JP2008138350A - Radio wave absorption yarn / electromagnetic wave shield yarn, radio wave absorption fabric, radio wave absorption sheet, radio wave absorption structure, radio wave absorption yarn / electromagnetic wave shield yarn manufacturing method, radio wave absorption yarn / electromagnetic wave shield yarn manufacturing device, and spinning device - Google Patents

Abstract

In an electromagnetic wave absorbing yarn, it can be easily spun as in the case of spinning a normal yarn made of a spinnable fiber, and is thin and light like a normal yarn made of a spinnable fiber. The fabric can be woven with a loom in exactly the same way, and it has a wide absorption band and high electromagnetic wave absorption capability.
A radio wave absorbing yarn 1 is constituted by a core yarn 2 made of polyester fiber as a spinnable fiber, a twisted yarn 3 made of polyester fiber, and a carbon yarn 4 made of carbon fiber. That is, the carbon yarn 4 having a random length made of carbon fibers is spaced apart from the core yarn 2 and is integrally fixed along the core yarn 2 by the twisted yarn 3. The length of the carbon yarn 4 is set to be a random length within a range of 25 mm ± 5 mm, that is, 20 mm to 30 mm. That is, it is manufactured so as to absorb a radio wave having a wavelength centered on a wavelength (about 25 mm) of a 5.8 GHz radio wave used in the ETC system.
[Selection] Figure 1

Description

  The present invention can be used as an excellent radio wave absorber and electromagnetic wave shield material regardless of whether it is inside or outside a building, and has both the same thinness and light weight as a yarn made of spinnable fibers. Easily woven radio wave absorption yarn / electromagnetic wave shield yarn, radio wave absorption fabric using the radio wave absorption yarn, radio wave absorption sheet, radio wave absorption structure, method for producing radio wave absorption yarn / electromagnetic wave shield yarn, and radio wave absorption The present invention relates to a yarn / electromagnetic shield yarn manufacturing device and a spinning device.

  In recent years, with the development of IT (information technology), IT and OA devices such as personal computers (hereinafter referred to as “personal computers”) have rapidly spread, and even in normal home and work environments, The effect of electromagnetic waves radiated from IT equipment / OA equipment on the human body has become a problem. Also, even outdoors, for example, with the current penetration rate of ETC (Electronic Toll Collection) system exceeding 60%, multiple ETC gates are installed side by side at toll gates on highways, and are adjacent to each other. In order to prevent crosstalk between the ETC gates, it is indispensable to cut off radio waves, and there is a growing demand for radio wave absorbers and electromagnetic wave shielding materials.

  Therefore, in Patent Document 1, in order to shield electromagnetic waves in a wider range, a mixed yarn of aluminum fiber and spinnable fiber obtained by finely cutting an aluminum foil into a staple fiber shape is used. The present invention discloses an idea of an electromagnetic shielding curtain formed by a woven fabric. Thus, the curtain itself has conductivity, and has a function of attenuating electromagnetic waves having a frequency of 10 MHz to 500 MHz by 30 dB to 50 dB or more.

Further, in Patent Document 2, a carbon yarn in which carbon as a magnetic material is coated on a surface of a cotton yarn, a copper wire as a conductor, and a polyethylene yarn as a dielectric material are combined to form a string. The invention of the formed radio wave absorber is disclosed. A radio wave absorbing plate is formed by pasting this radio wave absorber on the surface of a donut-shaped foamed polystyrene with a rubber adhesive to form a radio wave absorbing plate, and the overall thickness of the radio wave absorbing plate is approximately λ / 4. It is said that the leakage of the radio wave from the ventilation port can be prevented by attaching a predetermined number of sheets to the opening of the ventilation port of the anechoic chamber.
No. 3-36538 JP-A-6-120687

  However, in the electromagnetic wave shielding curtain described in Patent Document 1, in order to produce a blended yarn in which aluminum fibers are blended, an aluminum foil having a thickness of 10 μm to 20 μm is finely split by a splitter machine, and then a bar lock machine It is necessary to carry out complicated processes such as short fiber-like aluminum fiber obtained by the above process as a sliver, mixed with a cotton fiber or synthetic fiber sliver in a kneading machine, and spinning with this mixed sliver roving / spinning machine. However, it takes a lot of time and money to obtain blended yarn. The electromagnetic wave absorber described in Patent Document 2 also has a problem that a special device and process are required to coat the surface of the cotton yarn with carbon, and extra time and cost are required. It was.

  Therefore, the present invention can be spun easily as in the case of spinning a normal yarn made of a spinnable fiber, and is thin and light like a normal yarn made of a spinnable fiber. It is possible to weave woven fabrics with a loom in exactly the same way as above, and weave the electromagnetic wave absorbing and electromagnetic wave shielding yarns and the electromagnetic wave absorbing yarns that have a wide absorption band and high electromagnetic wave absorption capability, and also high electromagnetic wave shielding performance depending on the method of use. Production of radio wave absorption yarn and electromagnetic wave shield yarn for producing radio wave absorption fabric, radio wave absorption sheet and radio wave absorption structure using these radio wave absorption yarn and radio wave absorption fabric, and radio wave absorption yarn and electromagnetic wave shield yarn It is an object of the present invention to provide a method, a radio wave absorbing yarn / electromagnetic shield yarn manufacturing device, and a spinning device.

  The radio wave absorbing yarn according to the invention of claim 1 is a core yarn made of a spinnable fiber and a carbon fiber having a random length or a random length made of a carbon fiber spaced from the core yarn. A carbon wire having a random length or a random length made of the carbon fiber with a space between a core yarn made of the spinnable fiber and a twisted yarn made of the spinnable fiber. The metal wire is integrally fixed along the core yarn by a twisted yarn made of the spinnable fiber.

  Here, as the “spinnable fiber”, usually, cotton, silk, hemp, wool, nylon, vinylon, polyester fiber, acrylic fiber, vinylidene chloride fiber, organic fiber such as acetate and rayon, and inorganic fiber such as glass fiber. Fibers or these fibers can be mixed. Further, the “core yarn” and the “twisted yarn” may be made of the same “spinnable fiber” or may be made of “spinnable fibers” different from each other. Furthermore, the “core yarn” and the “twisted yarn” may have the same thickness, and one may be thicker than the other. Examples of the “metal wire” include stainless steel wire, copper wire, galvanized copper wire, and the like.

  The radio wave absorbing yarn according to the invention of claim 2 is a core yarn made of a spinnable fiber and a carbon fiber having a random length or a random length made of a carbon fiber spaced apart from the core yarn. The carbon wire and a twisted yarn made of the spinnable fiber, and continuously winding the spinnable yarn made of the spinnable fiber around the core yarn made of the spinnable fiber while spacing the carbon A carbon yarn cut into random length made of fibers or a metal wire cut into random length is supplied along the core yarn, so that the cut carbon yarn or the cut metal wire Is integrally fixed along the core yarn by the twisted yarn.

  Here, as the “spinnable fiber”, usually, cotton, silk, hemp, wool, nylon, vinylon, polyester fiber, acrylic fiber, vinylidene chloride fiber, organic fiber such as acetate and rayon, and inorganic fiber such as glass fiber. Fibers or these fibers can be mixed. Further, the “core yarn” and the “twisted yarn” may be made of the same “spinnable fiber” or may be made of “spinnable fibers” different from each other. Furthermore, the “core yarn” and the “twisted yarn” may have the same thickness, and one may be thicker than the other. Further, as the “metal wire”, a stainless steel wire, a copper wire, a galvanized copper wire, or the like can be used.

  The radio wave absorption yarn according to the invention of claim 3 is obtained by coating the radio wave absorption yarn of claim 1 or claim 2 with an organic synthetic resin, rubber or elastomer over the entire length.

  Here, examples of the “organic synthetic resin” include thermoplastic resins such as polyethylene, polypropylene, acrylic resin, and vinyl chloride resin, and thermosetting resins such as phenol resin and epoxy resin. “Elastomer” in the broad sense means “highly elastic polymer” and includes natural rubber and synthetic rubber (edited by Saburo Nagakura et al., “Iwanami Rikagaku Dictionary, 5th Edition”, page 153, published.・ Iwanami Shoten Co., Ltd., issue date, February 20, 1998), here, it means a narrowly defined elastomer that does not contain rubber.

  The electromagnetic wave absorbing yarn according to the invention of claim 4 is an organic synthetic resin, rubber or elastomer over the entire length after winding a fiber having a high dielectric constant over the entire length of the electromagnetic wave absorbing yarn according to claim 1 or claim 2. It is made by coating.

  Here, examples of the “fiber having a high dielectric constant” include glass fiber, a fiber in which a ceramic having a high dielectric constant is kneaded or affixed to a spinnable fiber, and the like. Examples of the “organic synthetic resin” include thermoplastic resins such as polyethylene, polypropylene, acrylic resin, and vinyl chloride resin, and thermosetting resins such as phenol resin and epoxy resin. Furthermore, the term “elastomer” refers to a “highly elastic polymer substance” in a broad sense, and includes natural rubber and synthetic rubber, but here means an elastomer in a narrow sense that does not contain rubber.

  The radio wave absorption yarn according to the invention of claim 5 is formed by coating a fluororesin over the entire length of the radio wave absorption yarn of claim 1 or claim 2. Here, as a method of coating the fluororesin, there are a method of spraying a liquid fluororesin, a method of immersing in a fluororesin solution, and a method of baking a gaseous fluororesin.

  The radio wave absorption fabric according to the invention of claim 6 is formed by weaving the radio wave absorption yarn according to any one of claims 1 to 5.

  The radio wave absorption fabric according to the invention of claim 7 is formed by mixing and mixing the radio wave absorption yarn according to any one of claims 1 to 5 and the yarn comprising the spinnable fiber. .

  An electromagnetic wave absorbing sheet according to an eighth aspect of the present invention is the electromagnetic wave absorbing fabric according to the sixth aspect or the seventh aspect, wherein one or two or more electromagnetic wave absorbing fabrics are stacked and sandwiched between two thin organic synthetic resin sheets, rubber sheets, or elastomer sheets. The sheet is formed by thermocompression bonding.

  The radio wave absorption sheet according to the invention of claim 9 is a two-layer organic thin film in which two or more sheets having different textures of the radio wave absorption yarn are overlapped with each other in the radio wave absorption fabric according to claim 6 or 7. The sheet is sandwiched between a synthetic resin sheet, a rubber sheet or an elastomer sheet and heat-pressed to form a sheet.

  According to a tenth aspect of the present invention, there is provided the radio wave absorption sheet according to the eighth or ninth aspect, wherein the radio wave absorption fabric has a coarse texture of 1 mm to 200 mm, and the two thin organic synthetic resin sheets or rubber sheets or The elastomer sheet is transparent.

  According to an eleventh aspect of the present invention, there is provided a radio wave absorption structure in which the radio wave absorption yarn according to any one of the first to fifth aspects is stretched across a frame body in parallel with a predetermined interval. 6. The radio wave absorption yarn according to claim 1, wherein the radio wave absorption yarns stretched between each other with a dielectric sheet interposed therebetween are vertically stacked, or the radio wave absorption yarn according to claim 1. Are stretched in both vertical and horizontal directions and / or diagonal directions.

  A radio wave absorption structure according to a twelfth aspect of the present invention is the Z direction in which the radio wave absorption yarn according to any one of claims 1 to 5 is arranged at a predetermined pitch on an outer peripheral surface of a plastic pipe having a predetermined inner diameter. And a metal rod or metal pipe inside the plastic pipe is supported by caps fixed to both ends of the plastic pipe along the center line of the plastic pipe. It will be.

  A radio wave absorption structure according to a thirteenth aspect of the present invention is a structure in which a plurality of the radio wave absorption structures according to the twelfth aspect are arranged in parallel at predetermined intervals.

  The method for producing a radio wave absorbing yarn according to the invention of claim 14 includes a yarn twisting step of continuously winding a twisted yarn made of a spinnable fiber around a core yarn made of a spinnable fiber, and the yarn twisting step in parallel with the yarn twisting step. A radio wave absorber supplying step for supplying a carbon yarn or metal wire made of carbon fiber along the core yarn, and a cutting step for cutting the carbon yarn or the metal wire supplied by the radio wave absorber supplying step into random lengths; And repeating the yarn twisting step, the radio wave absorber supplying step, and the cutting step.

  The apparatus for producing a radio wave absorbing yarn according to the invention of claim 15 is formed by winding a core yarn made of a spinnable fiber, a core yarn supplying means for supplying the core yarn, and a twisted yarn made of a spinnable fiber, A twisted yarn supplying means for supplying the twisted yarn, and a spindle with a rotary motor for rotating the twisted yarn supplying means, wherein the twisted yarn is supplied to the core yarn supplied from the core yarn supplying means by rotating the twisted yarn supplying means. A spindle that winds the twisted yarn supplied from the supply means in the vicinity of the upper end of the spindle and guides it downward through a through-hole penetrating from the upper end to the lower end of the spindle, and a carbon yarn or a radio wave absorber made of carbon fiber as a radio wave absorber. A metal wire as a material is wound around the tip of the carbon yarn or the metal wire near the upper end of the spindle An electromagnetic wave supply material supplying means for supplying, and an air that passes through the carbon yarn or the metal wire to the position where the end of the carbon yarn or the metal wire is wound around the core yarn in the vicinity of the upper end of the spindle A nozzle, a cutting means for cutting the carbon yarn or the metal wire provided between an upper end of the spindle and the air nozzle, and a supply length measurement for measuring a supply length of the carbon yarn or the metal wire. The length means and the supply length data of the carbon yarn or the metal wire measured by the supply length measuring means are input, and the input supply length data is a preprogrammed random length. A control means for operating the cutting means to cut the carbon yarn or the metal wire when reaching the position, and provided below the spindle. A radio wave absorbing yarn winding means for winding the carbon yarn cut to the random length by the twisted yarn or the radio wave absorbing yarn wound with the metal wire around the core yarn, the spindle, and the radio wave absorbing yarn winding A distance measuring means for measuring a length of the portion of the radio wave absorbing yarn wound around without being wound around the carbon yarn or the metal wire provided between the means, and the control means, At the same time as operating the cutting means, the supply length measuring means was stopped and the air pressure of the air nozzle was lowered, and the carbon yarn or the metal wire was wound without being wound from the interval length measuring means. When the data of the length of the electromagnetic wave absorbing yarn is input to the control means, and when the input data reaches a preprogrammed random length The supply length measuring means is rotated again and the air pressure of the air nozzle is increased.

  The radio wave absorption yarn, the radio wave absorption yarn manufacturing method, or the radio wave absorption yarn manufacturing apparatus according to the invention of claim 16 is the structure of any one of claims 1 to 5, and the configuration of claim 14 or claim 15, The random length is in the range of ± 1 mm to ± 10 mm in length which is a half of the wavelength of the radio wave to be absorbed by the radio wave absorbing yarn.

  The radio wave absorption yarn, the radio wave absorption yarn manufacturing method, or the radio wave absorption yarn manufacturing apparatus according to the invention of claim 17 is the structure according to any one of claims 1 to 5 or claims 14 to 16. The metal wire is a stainless steel wire or a galvanized copper wire.

  A spinning device according to an eighteenth aspect of the invention is the first yarn supplying means for supplying the first yarn, the second yarn being wound, and the second yarn being supplied by winding the first yarn. A second thread supply means that rotates and a spindle with a rotary motor that rotates the second thread supply means, and is supplied from the first thread supply means by rotating the second thread supply means. A spindle that winds the second yarn supplied from the second yarn supply means around the first yarn in the vicinity of the upper end of the spindle and guides it downward through a through-hole penetrating from the upper end to the lower end of the spindle; A third yarn supplying means for supplying the tip of the third yarn to the vicinity of the upper end of the spindle, and a tip of the third yarn passing through the third yarn. Near the top of the spindle An air nozzle that feeds the second yarn around the first yarn, a cutting means for cutting the third yarn provided between the upper end of the spindle and the air nozzle; Supply length measuring means for measuring the supply length of the third yarn, and data on the supply length of the third yarn measured by the supply length measuring means is input, and the input supply length When the data reaches a pre-programmed random length, the cutting means is operated to cut the third yarn, and the first yarn provided below the spindle A winding means for winding a thread around which the third thread cut to the random length by the second thread is wound; and the third means provided between the spindle and the winding means. Without the yarn being wound Interval measuring means for measuring the length of the scraped portion, and the control means activates the cutting means and simultaneously stops the supply length measuring means and controls the air pressure of the air nozzle. The length data of the portion wound without the third yarn being wound from the interval length measuring means is input to the control means, and the input data is a pre-programmed random length. When the pressure reaches the value, the supply length measuring means is rotated again and the air pressure of the air nozzle is increased.

  The electromagnetic wave shielding yarn according to the invention of claim 19 is a random length carbon yarn or a random length consisting of a core yarn made of a spinnable fiber and a carbon fiber spaced apart from the core yarn. A carbon wire having a random length or a random length made of the carbon fiber with a space between a core yarn made of the spinnable fiber and a twisted yarn made of the spinnable fiber. The metal wire is integrally fixed along the core yarn by a twisted yarn made of the spinnable fiber.

  Here, as the “spinnable fiber”, usually, cotton, silk, hemp, wool, nylon, vinylon, polyester fiber, acrylic fiber, vinylidene chloride fiber, organic fiber such as acetate and rayon, and inorganic fiber such as glass fiber. Fibers or these fibers can be mixed. Further, the “core yarn” and the “twisted yarn” may be made of the same “spinnable fiber” or may be made of “spinnable fibers” different from each other. Furthermore, the “core yarn” and the “twisted yarn” may have the same thickness, and one may be thicker than the other. Examples of the “metal wire” include stainless steel wire, copper wire, galvanized copper wire, and the like.

  The electromagnetic wave shielding yarn according to the invention of claim 20 is a carbon yarn having a random length or a random length comprising a core yarn made of a spinnable fiber and carbon fibers arranged at an interval from the core yarn. The carbon wire and a twisted yarn made of the spinnable fiber, and continuously winding the spinnable yarn made of the spinnable fiber around the core yarn made of the spinnable fiber while spacing the carbon A carbon yarn cut into random length made of fibers or a metal wire cut into random length is supplied along the core yarn, so that the cut carbon yarn or the cut metal wire Is integrally fixed along the core yarn by the twisted yarn.

  Here, as the “spinnable fiber”, usually, cotton, silk, hemp, wool, nylon, vinylon, polyester fiber, acrylic fiber, vinylidene chloride fiber, organic fiber such as acetate and rayon, and inorganic fiber such as glass fiber. Fibers or these fibers can be mixed. Further, the “core yarn” and the “twisted yarn” may be made of the same “spinnable fiber” or may be made of “spinnable fibers” different from each other. Furthermore, the “core yarn” and the “twisted yarn” may have the same thickness, and one may be thicker than the other. Further, as the “metal wire”, a stainless steel wire, a copper wire, a galvanized copper wire, or the like can be used.

  The electromagnetic shielding yarn according to the invention of claim 21 is formed by coating the electromagnetic shielding yarn of claim 19 or 20 with an organic synthetic resin, rubber or elastomer over the entire length.

  Here, examples of the “organic synthetic resin” include thermoplastic resins such as polyethylene, polypropylene, acrylic resin, and vinyl chloride resin, and thermosetting resins such as phenol resin and epoxy resin. The term “elastomer” refers to a “highly elastic polymer substance” in a broad sense, and includes natural rubber and synthetic rubber, but here, it means a narrowly defined elastomer that does not contain rubber.

  The electromagnetic shielding yarn according to the invention of claim 22 is an organic synthetic resin, rubber or elastomer over the entire length after winding a fiber having a high dielectric constant over the entire length of the electromagnetic shielding yarn according to claim 19 or 20. It is made by coating.

  Here, examples of the “fiber having a high dielectric constant” include glass fiber, a fiber in which a ceramic having a high dielectric constant is kneaded or affixed to a spinnable fiber, and the like. Examples of the “organic synthetic resin” include thermoplastic resins such as polyethylene, polypropylene, acrylic resin, and vinyl chloride resin, and thermosetting resins such as phenol resin and epoxy resin. Furthermore, the term “elastomer” refers to a “highly elastic polymer substance” in a broad sense, and includes natural rubber and synthetic rubber, but here means an elastomer in a narrow sense that does not contain rubber.

  The electromagnetic shielding yarn according to the invention of claim 23 is formed by coating a fluororesin over the entire length of the electromagnetic shielding yarn of claim 19 or claim 20. Here, as a method of coating the fluororesin, there are a method of spraying a liquid fluororesin, a method of immersing in a fluororesin solution, and a method of baking a gaseous fluororesin.

  The method for producing an electromagnetic shielding yarn according to the invention of claim 24 includes a yarn twisting step of continuously winding a twisted yarn made of a spinnable fiber around a core yarn made of a spinnable fiber, and the yarn twisting step in parallel with the yarn twisting step. An electromagnetic shielding material supply step of supplying carbon yarn or metal wire made of carbon fiber along the core yarn, and a cutting step of cutting the carbon yarn or metal wire supplied by the electromagnetic shielding material supply step into random lengths; And repeating the yarn twisting step, the electromagnetic shielding material supply step, and the cutting step.

  An apparatus for producing an electromagnetic wave shielding yarn according to the invention of claim 25, wherein a core yarn made of a spinnable fiber is wound, a core yarn supplying means for supplying the core yarn, and a twisted yarn made of a spinnable fiber are wound, A twisted yarn supplying means for supplying the twisted yarn, and a spindle with a rotary motor for rotating the twisted yarn supplying means, wherein the twisted yarn is supplied to the core yarn supplied from the core yarn supplying means by rotating the twisted yarn supplying means. A spindle that winds the twisted yarn supplied from the supply means in the vicinity of the upper end of the spindle and guides it downward through a through-hole penetrating from the upper end to the lower end of the spindle, and a carbon yarn or an electromagnetic shield made of carbon fiber as an electromagnetic shielding material A metal wire as a material is wound, and the carbon yarn or The electromagnetic shielding material supply means for supplying the tip of the metal wire, and the carbon yarn or the metal wire penetrates the tip of the carbon yarn or the metal wire to the core yarn near the upper end of the spindle. An air nozzle for feeding to a winding position, a cutting means for cutting the carbon yarn or the metal wire provided between an upper end of the spindle and the air nozzle, and a supply length of the carbon yarn or the metal wire. Supply length measuring means to be measured, and supply length data of the carbon yarn or the metal wire measured by the supply length measuring means are input, and the input supply length data is programmed in advance. Control means for operating the cutting means when the random length is reached and cutting the carbon yarn or the metal wire; An electromagnetic shielding yarn winding means for winding up the electromagnetic shielding electromagnetic wave absorbing yarn in which the carbon yarn or the metal wire wound around the random length by the twisted yarn is wound around the core yarn provided below the spindle; An interval length measuring unit for measuring the length of the portion of the electromagnetic wave shielding yarn wound around the carbon yarn or the metal wire provided between the spindle and the electromagnetic wave shielding yarn winding unit; The control means operates the cutting means and simultaneously stops the supply length measuring means and lowers the air pressure of the air nozzle so that the carbon yarn or the metal wire is wound from the interval measuring means. The length of the portion of the electromagnetic shielding yarn wound up without being input is input to the control means, and is input. When the read data reaches a pre-programmed random length, the supply length measuring means is rotated again and the air pressure of the air nozzle is increased.

  The radio wave absorption yarn according to the invention of claim 1 is a random yarn having a core length made of a spinnable fiber and a carbon fiber having a random length made of carbon fibers arranged at intervals with respect to the core yarn. A carbon fiber having a random length or a metal wire having a random length, the carbon fiber having a random length, and a core yarn made of a spinnable fiber, spaced from a core yarn made of a spinnable fiber. It is integrally fixed along the core yarn by a twisted yarn made of spinnable fibers.

  Here, as the “spinnable fiber”, usually, cotton, silk, hemp, wool, nylon, vinylon, polyester fiber, acrylic fiber, vinylidene chloride fiber, organic fiber such as acetate and rayon, and inorganic fiber such as glass fiber. Fibers or these fibers can be mixed. Further, the “core yarn” and the “twisted yarn” may be made of the same “spinnable fiber” or may be made of “spinnable fibers” different from each other. Furthermore, the “core yarn” and the “twisted yarn” may have the same thickness, and one may be thicker than the other. Examples of the “metal wire” include stainless steel wire, copper wire, galvanized copper wire, and the like.

  In this way, a yarn in which a carbon fiber having a random length or a metal wire having a random length is fixed to a core yarn made of a spinnable fiber at a distance by a twisted yarn made of a spinnable fiber. By doing so, carbon fibers or metal wires having random lengths absorb radio waves corresponding to the respective lengths, so that the radio wave absorbing yarn has a wide absorption band. Therefore, if a woven fabric is woven using such a radio wave absorbing yarn, a radio wave absorbing fabric having a wide absorption band and a high radio wave absorbing ability is obtained.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The fabric can be woven with a loom in exactly the same manner, and it has a wide absorption band and high radio wave absorption capability.

  The radio wave absorbing yarn according to the invention of claim 2 is a core yarn made of a spinnable fiber and a carbon fiber having a random length or a random length made of a carbon fiber spaced apart from the core yarn. The carbon wire and a twisted yarn made of the spinnable fiber, and continuously winding the spinnable yarn made of the spinnable fiber around the core yarn made of the spinnable fiber while spacing the carbon A carbon yarn cut into random length made of fibers or a metal wire cut into random length is supplied along the core yarn, so that the cut carbon yarn or the cut metal wire Is integrally fixed along the core yarn by the twisted yarn.

  Here, as the “spinnable fiber”, usually, cotton, silk, hemp, wool, nylon, vinylon, polyester fiber, acrylic fiber, vinylidene chloride fiber, organic fiber such as acetate and rayon, and inorganic fiber such as glass fiber. Fibers or these fibers can be mixed. Further, the “core yarn” and the “twisted yarn” may be made of the same “spinnable fiber” or may be made of “spinnable fibers” different from each other. Furthermore, the “core yarn” and the “twisted yarn” may have the same thickness, and one may be thicker than the other. Examples of the “metal wire” include stainless steel wire, copper wire, galvanized copper wire, and the like.

  In this way, a yarn in which a carbon fiber having a random length or a metal wire having a random length is fixed to a core yarn made of a spinnable fiber at a distance by a twisted yarn made of a spinnable fiber. By doing so, carbon fibers or metal wires having random lengths absorb radio waves corresponding to the respective lengths, so that the radio wave absorbing yarn has a wide absorption band. Therefore, if a woven fabric is woven using such a radio wave absorbing yarn, a radio wave absorbing fabric having a wide absorption band and a high radio wave absorbing ability is obtained.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The fabric can be woven with a loom in exactly the same manner, and it has a wide absorption band and high radio wave absorption capability.

  The radio wave absorption yarn according to the invention of claim 3 is formed by coating the radio wave absorption yarn of claim 1 or claim 2 with an organic synthetic resin, rubber or elastomer over the entire length. Here, examples of the “organic synthetic resin” include thermoplastic resins such as polyethylene, polypropylene, acrylic resin, and vinyl chloride resin, and thermosetting resins such as phenol resin and epoxy resin. The term “elastomer” refers to a “highly elastic polymer substance” in a broad sense, and includes natural rubber and synthetic rubber, but here means an elastomer in a narrow sense that does not contain rubber.

  The radio wave absorbing yarn having such a structure is excellent in water resistance because it is coated with an organic synthetic resin, rubber, or elastomer over the entire length, and the radio wave absorbing fabric formed by weaving the radio wave absorbing yarn can be used as it is without being sealed. Can be used in Accordingly, it can be easily used for outdoor radio wave absorption.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The woven fabric can be woven with the loom in exactly the same manner, and it has a wide absorption band, a high radio wave absorption capability, and a radio wave absorbing yarn that can be used outdoors.

  The electromagnetic wave absorbing yarn according to the invention of claim 4 is an organic synthetic resin, rubber or elastomer over the entire length after winding a fiber having a high dielectric constant over the entire length of the electromagnetic wave absorbing yarn according to claim 1 or claim 2. Coated. Here, examples of the “fiber having a high dielectric constant” include glass fiber, a fiber in which a ceramic having a high dielectric constant is kneaded or affixed to a spinnable fiber, and the like.

  Thus, by winding a fiber having a high dielectric constant, such as glass fiber, over the entire length of the radio wave absorption yarn according to claim 1 or 2, a radio wave absorption fabric formed by weaving the radio wave absorption yarn is obtained. In the case of forming a radio wave absorption structure in combination with a metal plate / metal mesh, the space between the radio wave absorption fabric and the metal plate / metal mesh can be reduced, thus saving space. And since it is coated with organic synthetic resin, rubber, or elastomer over the entire length, it is excellent in water resistance, and the radio wave absorption fabric formed by weaving such radio wave absorption yarn can be used as it is without being sealed. Accordingly, it can be easily used for outdoor radio wave absorption.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The woven fabric can be woven with the loom in exactly the same manner, and it has a wide absorption band, a high radio wave absorption capability, and a radio wave absorbing yarn that can be used outdoors.

  The radio wave absorption yarn according to the invention of claim 5 is formed by coating a fluororesin over the entire length of the radio wave absorption yarn of claim 1 or claim 2. Here, as a method of coating the fluororesin, there are a method of spraying a liquid fluororesin, a method of immersing in a fluororesin solution, and a method of baking a gaseous fluororesin.

  The radio wave absorbing yarn having such a configuration is excellent in water resistance because it is coated with a fluororesin having water repellency over the entire length, and the radio wave absorbing fabric formed by weaving such a radio wave absorbing yarn can be used outdoors without being sealed. Can be used.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The woven fabric can be woven with the loom in exactly the same manner, and it has a wide absorption band, a high radio wave absorption capability, and a radio wave absorbing yarn that can be used outdoors.

  The radio wave absorption fabric according to the invention of claim 6 is formed by weaving the radio wave absorption yarn according to any one of claims 1 to 5. As described above, the radio wave absorbing yarns according to claims 1 to 5 are all made of a core yarn made of a spinnable fiber having a random length carbon yarn or a random length metal wire. A wide number of carbon fibers or metal wires of a random length absorb a radio wave corresponding to each length by forming a yarn that is integrally fixed at intervals by twisted yarns made of fibers. It becomes an electromagnetic wave absorbing yarn. Therefore, if a woven fabric is woven using such a radio wave absorbing yarn, a radio wave absorbing fabric having a wide absorption band and a high radio wave absorbing ability is obtained.

  In this way, a random number of carbon yarns or random length metal wires were fixed to a core yarn made of a spinnable fiber by a twisted yarn made of a spinnable fiber at an interval. By weaving the radio wave absorbing yarn, it becomes a radio wave absorbing fabric that can be woven with a loom just like a normal fabric while having excellent radio wave absorbing performance.

  A radio wave absorption fabric according to a seventh aspect of the invention is formed by mixing and mixing the radio wave absorption yarn according to any one of the first to fifth aspects and a spinnable fiber. Even if we mix and weave electric wave absorbing yarn and spinnable fiber, we do not deteriorate big electric wave absorption performance, and when we use for indoor curtains, weaving which we mixed spinnable fiber Can be produced at low cost, and a light shielding effect can be obtained.

  In this way, a random number of carbon yarns or random length metal wires were fixed to a core yarn made of a spinnable fiber by a twisted yarn made of a spinnable fiber at an interval. By weaving the radio wave absorbing yarn, it becomes a radio wave absorbing fabric that can be woven with a loom just like a normal fabric while having excellent radio wave absorbing performance.

  An electromagnetic wave absorbing sheet according to an eighth aspect of the present invention is the electromagnetic wave absorbing fabric according to the sixth aspect or the seventh aspect, wherein one or two or more electromagnetic wave absorbing fabrics are stacked and sandwiched between two thin organic synthetic resin sheets, rubber sheets, or elastomer sheets. The sheet is formed by thermocompression bonding. As a result, the radio wave absorption fabric without water resistance is prevented from getting wet by moisture such as rain, and the radio wave absorption sheet can be used outdoors.

  In this way, the radio wave absorbing sheet can be installed in any place and has excellent radio wave absorption performance.

  The radio wave absorbing sheet according to the invention of claim 9 is a thin organic composite comprising two or more layers of the radio wave absorbing fabric according to claim 6 or 7, wherein two or more sheets having different textures of the radio wave absorbing yarn are stacked on each other. It is sandwiched between a resin sheet, rubber sheet or elastomer sheet and heat-pressed to form a sheet.

  When the texture of the radio wave absorption fabric is different, the frequency band showing the greatest radio wave absorption is different. Therefore, by laminating two or more of such radio wave absorbent fabrics, a radio wave absorption sheet having excellent radio wave absorption performance over a wider frequency band is obtained. And it becomes an electromagnetic wave absorption sheet which can prevent the radio wave absorption fabric without water resistance from getting wet with moisture such as rain and can be used outdoors.

  In this way, the radio wave absorbing sheet has excellent radio wave absorption performance over a wider frequency band and can be installed in any place, and has excellent radio wave absorption performance.

  In the radio wave absorbing sheet according to the invention of claim 10, the radio wave absorbing fabric has a coarse weave of 1 mm to 200 mm and the two thin organic synthetic resin sheets, rubber sheets or elastomer sheets are transparent.

  In this way, the radio wave absorbing fabric has a coarse texture of 1 mm to 200 mm and the organic synthetic resin sheet, rubber sheet, or elastomer sheet is transparent, so that the constructed radio wave absorbing sheet has translucency and the other side is visible. It will be a thing. Therefore, it is extremely suitable for applications requiring translucency.

  In this way, the radio wave absorbing sheet has excellent radio wave absorption performance and has translucency and the other side can be seen.

  According to an eleventh aspect of the present invention, there is provided a radio wave absorption structure in which the radio wave absorption yarn according to any one of the first to fifth aspects is stretched across a frame body in parallel with a predetermined interval. 6. The radio wave absorption yarns stretched so as to be perpendicular to each other with a dielectric sheet interposed therebetween, or the radio wave absorption yarn according to claim 1 as a frame. It is stretched in both vertical and horizontal directions and / or diagonal directions.

  As a result, even if the fabric is not woven by the loom, it is stretched with a predetermined interval according to the wavelength of the radio wave to be absorbed by the radio wave absorption yarn, whereby a radio wave absorption structure having excellent radio wave absorption performance is obtained. Since only the radio wave absorbing yarn is stretched at a predetermined interval, the radio wave absorbing structure is excellent in translucency and the other side can be seen well. In addition, the radio wave absorption structure formed by stretching the radio wave absorption yarns of claims 3 to 5 over the frame body is excellent in water resistance, and therefore is suitable for outdoor use.

  In this manner, a radio wave absorption structure having a simple structure and excellent radio wave absorption performance, and translucency and the other side can be clearly seen.

  A radio wave absorption structure according to a twelfth aspect of the present invention is the Z direction in which the radio wave absorption yarn according to any one of claims 1 to 5 is arranged at a predetermined pitch on an outer peripheral surface of a plastic pipe having a predetermined inner diameter. And a metal rod or metal pipe is supported inside a plastic pipe by caps fixed to both ends of the plastic pipe along the center line of the plastic pipe.

  The radio wave incident on the radio wave absorption structure having such a structure is first partially absorbed by the radio wave absorbing yarn on the outer peripheral surface of the plastic pipe, reflected by the metal rod or pipe inside the plastic pipe, and again It is absorbed by the electromagnetic wave absorbing yarn on the outer peripheral surface. Accordingly, it is possible to strongly absorb radio waves incident from any direction with respect to the radio wave absorption structure.

  The predetermined inner diameter of the plastic pipe (more precisely, the distance from the inner metal rod or pipe surface to the outer surface electromagnetic wave absorbing yarn) and the predetermined pitch around which the electric wave absorbing yarn is wound, By setting according to the wavelength, the radio wave of the target wavelength can be efficiently absorbed. Moreover, if a transparent thing is used as a plastic pipe, it will become an electromagnetic wave absorption structure which also has translucency.

  In this way, a radio wave absorption structure having excellent radio wave absorption performance and capable of particularly strongly absorbing radio waves of a predetermined wavelength is obtained.

  A radio wave absorption structure according to a thirteenth aspect of the present invention is formed by arranging a plurality of radio wave absorption structures according to the twelfth aspect of the present invention in parallel at predetermined intervals.

  As a result, radio waves can be absorbed over a wide area, and a stronger radio wave absorption capability is exhibited by corresponding to the wavelength of the radio wave to be absorbed at a predetermined interval. In addition, since the radio wave absorption structure according to claim 12 is arranged at a predetermined interval, the other side can be seen even when a transparent plastic pipe is not used.

  In this way, a radio wave absorption structure having excellent radio wave absorption performance and capable of particularly strongly absorbing radio waves of a predetermined wavelength is obtained.

  The method for producing a radio wave absorbing yarn according to the invention of claim 14 includes a yarn twisting step of continuously winding a twisted yarn made of a spinnable fiber around a core yarn made of a spinnable fiber, and a core yarn in parallel with the yarn twisting step. A radio wave absorber supplying process for supplying carbon yarns or metal wires made of carbon fibers along with a cutting process for cutting carbon fibers or metal wires supplied by the radio wave absorber supplying process into random lengths. The yarn twisting process, the radio wave absorber supplying process, and the cutting process are repeated.

  As a result, the carbon yarn or metal wire cut to a random length in the cutting step is fixed at intervals along the core yarn made of the spinnable fiber by the twisted yarn made of the spinnable fiber. Since the carbon fibers or metal wires having random lengths absorb radio waves corresponding to the respective lengths, radio wave absorbing yarns having a wide absorption band can be manufactured. Then, by repeating a series of steps, a radio wave absorbing yarn having an arbitrary length can be manufactured.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. In the same way, a woven fabric can be woven with a loom, and a method for producing a radio wave absorption yarn having a wide absorption band and a high radio wave absorption capability is obtained.

  According to a fifteenth aspect of the present invention, there is provided a radio wave absorbing yarn manufacturing apparatus in which a core yarn made of a spinnable fiber is wound, a core yarn supplying means for supplying the core yarn, and a twisted yarn made of a spinnable fiber is wound. And a spindle with a rotary motor for rotating the yarn supply means, and the yarn supplied from the yarn supply means to the core yarn supplied from the core yarn supply means by rotating the yarn supply means Is wound around the upper end of the spindle and guided downward through a through hole penetrating from the upper end to the lower end of the spindle, and a carbon yarn made of carbon fiber as a radio wave absorber or a metal wire as a radio wave absorber is wound around the spindle. A wave absorber supplying means for supplying the tip of the carbon yarn or metal wire to the vicinity of the upper end of the wire The air nozzle that feeds the tip of the carbon yarn or metal wire to the position where the twisted yarn is wound around the core yarn near the top end of the spindle, and the carbon yarn or metal wire provided between the top end of the spindle and the air nozzle The data of the supply length of the carbon yarn or the metal wire measured by the cutting means for cutting the wire, the supply length measuring means for measuring the supply length of the carbon yarn or metal wire, and the supply length measuring means are input. When the input feed length data reaches a preprogrammed random length, the cutting means is operated to cut the carbon yarn or metal wire, and the core provided below the spindle Electromagnetic wave absorbing yarn winding means for winding an electromagnetic wave absorbing yarn in which a carbon yarn or a metal wire wound around a yarn by a twisted yarn is wound at random length; A distance measuring means for measuring the length of the portion of the electromagnetic wave absorbing yarn wound between the spindle and the electromagnetic wave absorbing thread winding means without being wound with the carbon yarn or metal wire, and a control means Activates the cutting means and simultaneously stops the supply length measuring means and reduces the air pressure of the air nozzle, so that the electromagnetic wave absorbing yarn wound up without winding the carbon yarn or metal wire from the interval length measuring means. The length data of the portion is input to the control means, and when the input data reaches a pre-programmed random length, the supply length measuring means is rotated again and the air pressure of the air nozzle is increased.

  In such an electromagnetic wave absorbing yarn manufacturing apparatus, the twisted yarn supplied from the twisted yarn supplying means is wound around the core yarn supplied from the core yarn supplying means, and guided downward through the through hole of the spindle. By being wound up, the core yarn wound with the twisted yarn moves. Here, the data of the length of the portion of the radio wave absorbing yarn wound without winding the carbon yarn or the metal wire from the interval length measuring means is input to the control means, and the input data is a random number programmed in advance. When the length is reached, the supply length measuring means is rotated and the air pressure of the air nozzle is raised, and the tip of the carbon yarn or metal wire is sent to a position where the twisted yarn is wound around the core yarn.

  At the same time, the carbon yarn or metal wire wrapped around the core yarn by the twist yarn moves, and the supply length data of the carbon yarn or metal wire is input from the supply length measuring means to the control means. When the supplied length data reaches a pre-programmed random length, the cutting means is operated by the control means to cut the carbon yarn or the metal wire. By repeating this, the carbon yarn or metal wire cut to random length by the cutting means was fixed at intervals along the core yarn made of the spinnable fiber by the twisted yarn made of the spinnable fiber. Since radio wave absorbing yarns are manufactured continuously, and carbon fibers or metal wires of random length absorb radio waves corresponding to the respective lengths, it is possible to manufacture radio wave absorbing yarns with a wide absorption band. it can. Then, by repeating a series of steps, a radio wave absorbing yarn having an arbitrary length can be manufactured.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The fabric can be woven with a loom in exactly the same manner, and the apparatus for producing radio wave absorption yarn having a wide absorption band and high radio wave absorption capability.

  In the radio wave absorption yarn, the radio wave absorption yarn manufacturing method, or the radio wave absorption yarn manufacturing apparatus according to the invention of claim 16, the random length is one-half the wavelength of the radio wave to be absorbed by the radio wave absorption yarn. It is within the range of ± 1 mm to ± 10 mm, more preferably within the range of ± 1 mm to ± 5 mm. As a result, a radio wave absorbing yarn having a radio wave absorption band greatly widened with a peak of the wavelength of the radio wave to be absorbed can be obtained.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The fabric can be woven with a loom in exactly the same manner, and it is a radio wave absorption yarn having a wide absorption band and high radio wave absorption capability, a radio wave absorption yarn manufacturing method, or a radio wave absorption yarn manufacturing apparatus.

  In the radio wave absorbing yarn, the radio wave absorbing yarn manufacturing method or the radio wave absorbing yarn manufacturing apparatus according to the invention of claim 17, the metal wire is a stainless steel wire or a galvanized copper wire. Stainless steel wires and galvanized copper wires have water resistance, are resistant to rusting, and are excellent in weather resistance. Therefore, radio wave absorbing yarn using these as metal wires is more or less uncoated. Excellent water resistance and suitable for outdoor use.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. It is possible to weave woven fabrics with a loom in exactly the same way, and has a wide absorption band and high radio wave absorption capability, making it a radio wave absorption yarn suitable for outdoor use, a radio wave absorption yarn manufacturing method or a radio wave absorption yarn manufacturing device. .

  The spinning device according to the invention of claim 18 is the first yarn supplying means for supplying the first yarn, the first yarn supplying means for supplying the first yarn, and the first yarn supplying means for supplying the second yarn. A spindle with a rotary motor for rotating the second yarn supplying means and the second yarn supplying means, and the first yarn supplied from the first yarn supplying means by rotating the second yarn supplying means A spindle for winding the second yarn supplied from the second yarn supply means in the vicinity of the upper end of the spindle and guiding it downward through a through hole penetrating from the upper end to the lower end of the spindle, and a third yarn are wound around the spindle. A third yarn supplying means for supplying the tip of the third yarn to the vicinity of the upper end of the second thread, and a second thread passing through the third yarn to the first yarn near the upper end of the spindle. Air nozzle that feeds to the position where the yarn is wound A cutting means for cutting a third yarn provided between the upper end of the spindle and the air nozzle, a supply length measuring means for measuring the supply length of the third yarn, and a supply length measuring means The third yarn supply length data measured by the above is input, and when the input supply length data reaches a pre-programmed random length, the cutting means is operated and the third yarn is operated. A control means for cutting the yarn, a winding means for winding the yarn in which the first yarn provided below the spindle is wound with the third yarn cut to a random length by the second yarn, and the spindle And a distance measuring means for measuring the length of the portion wound without being wound by the third yarn provided between the winding means and the winding means, and when the control means operates the cutting means At the same time, the supply length measuring means is stopped and -The air pressure of the nozzle is lowered, the length data of the portion wound without the third yarn being wound from the interval length measuring means is input to the control means, and the input data is a pre-programmed random length. At this point, the supply length measuring means is rotated again and the air pressure of the air nozzle is increased.

  In such a spinning device, the second yarn supplied from the second yarn supply means is wound around the first yarn supplied from the first yarn supply means and guided downward through the through hole of the spindle. By being wound up by the winding means, the first yarn wound around the second yarn moves. Here, the length data of the portion wound without winding the third yarn from the interval length measuring means is input to the control means, and the input data has reached a preprogrammed random length. At that time, the supply length measuring means is rotated and the air pressure of the air nozzle is increased, and the tip of the third yarn is sent to a position where the second yarn is wound around the first yarn.

  At the same time, the third yarn wound around the first yarn by the second yarn moves, and the data on the supply length of the third yarn is inputted from the supply length measuring means to the control means. When the input supply length data reaches a preprogrammed random length, the cutting means is actuated by the control means to cut the third yarn. By repeating this, the third yarn that has been cut to a random length by the cutting means is continuously produced by the second yarn that is fixed at intervals along the first yarn. It will be. And a thread | yarn of arbitrary length can be manufactured by repeating a series of processes.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The fabric can be woven with a loom in exactly the same manner, and the yarn spinning device has a special structure.

  The electromagnetic shielding yarn according to the invention of claim 19 is a random length carbon yarn or a random length consisting of a core yarn made of a spinnable fiber and a carbon fiber arranged at a distance from the core yarn. A carbon fiber having a random length or a metal wire having a random length, the carbon fiber having a random length, and a core yarn made of a spinnable fiber, spaced from a core yarn made of a spinnable fiber. It is integrally fixed along the core yarn by a twisted yarn made of spinnable fibers.

  Here, as the “spinnable fiber”, usually, cotton, silk, hemp, wool, nylon, vinylon, polyester fiber, acrylic fiber, vinylidene chloride fiber, organic fiber such as acetate and rayon, and inorganic fiber such as glass fiber. Fibers or these fibers can be mixed. Further, the “core yarn” and the “twisted yarn” may be made of the same “spinnable fiber” or may be made of “spinnable fibers” different from each other. Furthermore, the “core yarn” and the “twisted yarn” may have the same thickness, and one may be thicker than the other. Examples of the “metal wire” include stainless steel wire, copper wire, galvanized copper wire, and the like.

  That is, the electromagnetic wave shielding yarn according to the present invention has the same structure as the radio wave absorbing yarn according to the invention of claim 1. Therefore, it can be manufactured by the same method. Even if it has the same structure as the radio wave absorbing yarn according to the invention of claim 1, it can be applied as an electromagnetic shielding yarn in special applications.

  For example, when shielding a flat plate with electromagnetic waves, it can be shielded by attaching a thin metal foil to the surface of the flat plate. In the case of those having a metal foil, it is not possible to shield the electromagnetic wave even if it is wound around a surface of a thin metal foil or the like, and it is effective for the first time by winding the one having a structure like the electromagnetic wave shielding yarn according to the present invention. Can be shielded electromagnetically.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The woven fabric can be woven with a loom in exactly the same manner, and the electromagnetic shielding yarn has excellent electromagnetic shielding properties.

  The electromagnetic shielding yarn according to the invention of claim 20 is a random length carbon yarn or a random length consisting of a core yarn made of a spinnable fiber and a carbon fiber arranged at a distance from the core yarn. Randomly made of carbon fiber at intervals while continuously winding a twisted yarn made of a spinnable fiber around a core yarn made of a spinnable fiber. The carbon yarn cut into length or the metal wire cut into random length is supplied along the core yarn, so that the cut carbon yarn or the cut metal wire is twisted along the core yarn. It is fixed integrally.

  Here, as the “spinnable fiber”, usually, cotton, silk, hemp, wool, nylon, vinylon, polyester fiber, acrylic fiber, vinylidene chloride fiber, organic fiber such as acetate and rayon, and inorganic fiber such as glass fiber. Fibers or these fibers can be mixed. Further, the “core yarn” and the “twisted yarn” may be made of the same “spinnable fiber” or may be made of “spinnable fibers” different from each other. Furthermore, the “core yarn” and the “twisted yarn” may have the same thickness, and one may be thicker than the other. Further, as the “metal wire”, a stainless steel wire, a copper wire, a galvanized copper wire, or the like can be used.

  That is, the electromagnetic shielding yarn according to the present invention has the same structure as the radio wave absorbing yarn according to the invention of claim 2. Therefore, it can be manufactured by the same method. Even if it has the same structure as the radio wave absorbing yarn according to the invention of claim 2, it can be applied as an electromagnetic shielding yarn in special applications.

  For example, when shielding a flat plate with electromagnetic waves, it can be shielded by attaching a thin metal foil to the surface of the flat plate. In the case of those having a metal foil, it is not possible to shield the electromagnetic wave even if it is wound around a surface of a thin metal foil or the like, and it is effective for the first time by winding the one having a structure like the electromagnetic wave shielding yarn according to the present invention. Can be shielded electromagnetically.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The woven fabric can be woven with a loom in exactly the same manner, and the electromagnetic shielding yarn has excellent electromagnetic shielding properties.

  The electromagnetic shielding yarn according to the invention of claim 21 is formed by coating the electromagnetic shielding yarn of claim 19 or 20 with an organic synthetic resin, rubber or elastomer over the entire length.

  Here, examples of the “organic synthetic resin” include thermoplastic resins such as polyethylene, polypropylene, acrylic resin, and vinyl chloride resin, and thermosetting resins such as phenol resin and epoxy resin. The term “elastomer” refers to a “highly elastic polymer substance” in a broad sense, and includes natural rubber and synthetic rubber, but here, it means a narrowly defined elastomer that does not contain rubber.

  That is, the electromagnetic wave shielding yarn according to the present invention has the same structure as the radio wave absorbing yarn according to the invention of claim 3. Therefore, it can be manufactured by the same method. Even if it has the same structure as the radio wave absorbing yarn according to the invention of claim 3, it can be applied as an electromagnetic shielding yarn in special applications.

  For example, when shielding a flat plate with electromagnetic waves, it can be shielded by attaching a thin metal foil to the surface of the flat plate. In the case of those having a metal foil, it is not possible to shield the electromagnetic wave even if it is wound around a surface of a thin metal foil or the like, and it is effective for the first time by winding the one having a structure like the electromagnetic wave shielding yarn according to the present invention. Can be shielded electromagnetically.

  The electromagnetic shielding yarn having such a configuration is coated with an organic synthetic resin, rubber, or elastomer over the entire length, so that it has excellent water resistance and can be used outdoors as it is without sealing. Therefore, it can be easily used for electromagnetic wave shielding in the outdoors.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The woven fabric can be woven with a loom in exactly the same manner, and it can be used as it is, and it can be used outdoors as it is, and it has an excellent electromagnetic shielding characteristic.

  The electromagnetic shielding yarn according to the invention of claim 22 is an organic synthetic resin, rubber or elastomer over the entire length after winding a fiber having a high dielectric constant over the entire length of the electromagnetic shielding yarn according to claim 19 or 20. It is made by coating.

  Here, examples of the “fiber having a high dielectric constant” include glass fiber, a fiber in which a ceramic having a high dielectric constant is kneaded or affixed to a spinnable fiber, and the like. Examples of the “organic synthetic resin” include thermoplastic resins such as polyethylene, polypropylene, acrylic resin, and vinyl chloride resin, and thermosetting resins such as phenol resin and epoxy resin. Furthermore, the term “elastomer” refers to a “highly elastic polymer substance” in a broad sense, and includes natural rubber and synthetic rubber, but here means an elastomer in a narrow sense that does not contain rubber.

  That is, the electromagnetic wave shielding yarn according to the present invention has the same structure as the radio wave absorbing yarn according to the invention of claim 4. Therefore, it can be manufactured by the same method. Even if it has the same structure as the radio wave absorbing yarn according to the invention of claim 4, it can be applied as an electromagnetic shielding yarn in a special application.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The woven fabric can be woven with a loom in exactly the same manner, and it can be used as it is, and it can be used outdoors as it is, and it has an excellent electromagnetic shielding characteristic.

  The electromagnetic shielding yarn according to the invention of claim 23 is formed by coating a fluororesin over the entire length of the electromagnetic shielding yarn of claim 19 or claim 20. Here, as a method of coating the fluororesin, there are a method of spraying a liquid fluororesin, a method of immersing in a fluororesin solution, and a method of baking a gaseous fluororesin.

  That is, the electromagnetic wave shielding yarn according to the present invention has the same structure as the radio wave absorbing yarn according to the invention of claim 5. Therefore, it can be manufactured by the same method. Even if it has the same structure as the radio wave absorbing yarn according to the invention of claim 5, it can be applied as an electromagnetic shielding yarn in special applications. And since the electromagnetic shielding yarn of this structure is coated with the fluororesin which has water repellency over the full length, it is excellent in water resistance, and can be used as it is even if it does not seal.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The woven fabric can be woven with a loom in exactly the same manner, and it can be used as it is, and it can be used outdoors as it is, and it has an excellent electromagnetic shielding characteristic.

  The method for producing an electromagnetic wave shielding yarn according to the invention of claim 24 includes a yarn twisting step in which a twisted yarn made of a spinnable fiber is continuously wound around a core yarn made of a spinnable fiber, and a core yarn in parallel with the yarn twisting step. An electromagnetic shielding material supplying step for supplying carbon yarn or metal wire made of carbon fiber along the cutting line, and a cutting step for cutting the carbon yarn or metal wire supplied by the electromagnetic shielding material supply step into random lengths. The yarn twisting process, the electromagnetic shielding material supplying process, and the cutting process are repeated.

  That is, the method for producing an electromagnetic wave shielding yarn according to the present invention is substantially the same as the method for producing an electromagnetic wave absorbing yarn according to the invention of claim 14. Therefore, a yarn having the same structure is manufactured, but even if it has the same structure as the radio wave absorbing yarn produced by the radio wave absorbing yarn manufacturing method according to the invention of claim 14, it is applied as an electromagnetic shielding yarn in special applications. be able to.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The fabric can be woven with a loom in exactly the same manner, and this is a method for producing an electromagnetic shielding yarn having excellent electromagnetic shielding characteristics.

  An apparatus for producing an electromagnetic wave shielding yarn according to the invention of claim 25 is the twisted yarn in which a core yarn made of a spinnable fiber is wound, a core yarn supplying means for supplying the core yarn, and a twisted yarn made of the spinnable fiber is wound. And a spindle with a rotary motor for rotating the yarn supply means, and the yarn supplied from the yarn supply means to the core yarn supplied from the core yarn supply means by rotating the yarn supply means Is wound around the top end of the spindle and guided downward through a through-hole penetrating from the top end to the bottom end of the spindle, and a carbon yarn made of carbon fiber as the electromagnetic shielding material or a metal wire as the electromagnetic shielding material is wound around the spindle. Electromagnetic shielding material supply means for supplying carbon yarn or metal wire tip to the vicinity of the upper end of The carbon yarn or metal wire passes through the air nozzle that feeds the tip of the carbon yarn or metal wire to the position where the twisted yarn is wound around the core yarn near the upper end of the spindle, and is provided between the upper end of the spindle and the air nozzle. Cutting means for cutting the carbon yarn or metal wire, supply length measuring means for measuring the supply length of the carbon yarn or metal wire, and supply of the carbon yarn or metal wire measured by the supply length measuring means When the length data is input and the input feed length data reaches a pre-programmed random length, the cutting means is operated to cut the carbon yarn or metal wire, and the spindle Winding a carbon yarn cut to random length with a twisted yarn or an electromagnetic shielding yarn wrapped with a metal wire around the core yarn provided below Interval measurement to measure the length of the electromagnetic shielding yarn winding means to be taken and the portion of the electromagnetic shielding yarn wound without being wound by the carbon yarn or metal wire provided between the spindle and the electromagnetic shielding yarn winding means The control means operates the cutting means and simultaneously stops the supply length measuring means and lowers the air pressure of the air nozzle, so that the carbon yarn or the metal wire is not wound from the interval length measuring means. The length data of the wound portion of the electromagnetic shielding yarn is input to the control means, and when the input data reaches a pre-programmed random length, the supply length measuring means is rotated again. Increase air nozzle air pressure.

  That is, the electromagnetic shielding yarn manufacturing apparatus according to the present invention is substantially the same as the radio wave absorbing yarn manufacturing apparatus according to the invention of claim 15. Therefore, a yarn having the same structure is manufactured, but even if it has the same structure as the radio wave absorbing yarn produced by the radio wave absorbing yarn manufacturing apparatus according to the invention of claim 15, it is applied as an electromagnetic shielding yarn in special applications. be able to.

  In this way, it can be spun as easily as spinning a normal yarn made of a spinnable fiber, and it is thin and light like a normal yarn made of a spinnable fiber. The woven fabric can be woven with the loom in exactly the same manner, and an electromagnetic shielding yarn manufacturing apparatus having excellent electromagnetic shielding characteristics is obtained.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1
First, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1A is a partial plan view showing the appearance of a part of the radio wave absorbing yarn according to the first embodiment of the present invention, FIG. 1B is a partially enlarged view of the radio wave absorbing yarn, and FIG. It is an enlarged view. FIG. 2 is a schematic diagram showing the overall configuration of the radio wave absorbing yarn manufacturing apparatus according to the first embodiment of the present invention. FIG. 3A is a perspective view showing the overall configuration of the radio wave absorption fabric according to the first embodiment of the present invention, and FIG. 3B is a perspective view showing the method for manufacturing the radio wave absorption sheet according to the first embodiment of the present invention. (C) is a perspective view which shows the whole structure of the electromagnetic wave absorption sheet concerning Embodiment 1 of this invention.

  As shown in FIG. 1, the radio wave absorbing yarn 1 according to the first embodiment includes a core yarn 2 made of polyester fiber as a spinnable fiber, and a twisted yarn 3 made of polyester fiber as a spinnable fiber, It is comprised by the carbon yarn 4 which consists of carbon fibers. That is, the carbon yarn 4 having a random length made of carbon fibers is spaced apart from the core yarn 2 and is integrally fixed along the core yarn 2 by the twisted yarn 3. The length of the carbon yarn 4 is set to be a random length within a range of 25 mm ± 5 mm, that is, 20 mm to 30 mm. That is, it is manufactured so as to absorb a radio wave having a wavelength centered on a wavelength (about 25 mm) of a 5.8 GHz radio wave used in the ETC system.

  Next, the manufacturing apparatus and manufacturing method of the radio wave absorbing yarn 1 according to the first embodiment will be described with reference to FIG. As shown in FIG. 2, the manufacturing apparatus 21 for the radio wave absorption yarn 1 according to the first embodiment includes a core yarn bobbin 26 as a core yarn supply unit around which the core yarn 2 is wound and supplies the core yarn 2. A twisted bobbin 27 serving as a twisted yarn supply means for winding the twisted yarn 3 and supplying the twisted yarn 3, and a spindle 28 with a rotation motor 29 for rotating the twisted yarn bobbin 27, and by rotating the twisted yarn bobbin 27, the core yarn bobbin 26 A spindle 28 that is wound around the core 2 supplied from the twisted bobbin 27 around the upper end of the spindle 28 and guides it downward through a through-hole penetrating from the upper end to the lower end of the spindle 28; A carbon yarn 4 made of a carbon fiber is wound and the tip of the carbon yarn 4 is supplied to the vicinity of the upper end of the spindle 28. It has and a carbon yarn bobbin 22 as a wave-absorbing material supply means.

  Further, the carbon yarn 4 penetrates, and the tip of the carbon yarn 4 is sent to a position where the twisted yarn 3 is wound around the core yarn 2 near the upper end of the spindle 28, and between the upper end of the spindle 28 and the air nozzle 24. And a pair of rotating rollers 23 as supply length measuring means for measuring the supply length of the carbon yarn 4. A pair of rotating rollers 23 incorporates a rotary encoder for length measurement.

  The supply length data of the carbon yarn 4 measured by the pair of rotating rollers 23 is input to the personal computer 30 as the control means, and the input supply length data reaches a preprogrammed random length. At that time, the personal computer 30 operates the cutter 25 to cut the carbon yarn 4. Below the spindle 28, a winding roller 32 is provided as a radio wave absorbing yarn winding means for winding the radio wave absorbing yarn 1 in which the carbon yarn 4 is wound around the core yarn 2 by the twisted yarn 3. Between the rollers 32, a pair of rotating rollers 31 are provided as interval length measuring means for measuring the length of the portion of the radio wave absorbing yarn 1 wound up without the carbon yarn 4 being wound. The pair of rotating rollers 31 also includes a length measuring rotary encoder.

In the radio wave absorbing yarn 1 manufacturing apparatus 21 according to the first embodiment having such a configuration, the core yarn 2 and the twisted yarn 3 wound around the core yarn 2 are wound around a winding roller 32 that is rotated by a rotary motor 33. As a result, they are pulled out from the core yarn bobbin 26 and the twisted yarn bobbin 27, respectively. On the other hand, the carbon yarn 4 wound and fixed around the core yarn 2 by the twisted yarn 3 is pulled out from the carbon yarn bobbin 22 by a pair of rotating rollers 23 as a supply length measuring means, passes through the air nozzle 24, and passes through the air nozzle 24. the position where the yarn 3 is wound straight to the core yarn 2 by 24 pneumatic ^{(3kgf / cm 2 ~6kgf / cm} 2), the tip is supplied.

  The tip of the supplied carbon yarn 4 is wound around the twisted yarn 3 rotated by the rotation of the spindle 28, wound around the core yarn 2 by the twisted yarn 3, and wound around the winding roller 32 together with the core yarn 2 and the twisted yarn 3. To move downward. Here, the carbon yarn 4 is cut by the cutter 25 after being wound around the twisted yarn 3. That is, when the supply length data input to the personal computer 30 from the pair of rotating rollers 23 as the supply length measuring means reaches the length programmed in the personal computer 30 in advance, the personal computer 30 sends it to the cutter 25. An operation signal is sent, and the cutter 25 is operated to cut the carbon yarn 4.

At the same time as the carbon yarn 4 is cut, the air pressure of the air nozzle 24 is reduced to about 0.5 kgf / cm ² , and the rotation of the pair of rotating rollers 23 as the supply length measuring means is also stopped. The tip of the carbon yarn 4 is not supplied to the position where the twisted yarn 3 is wound around the core yarn 2. As a result, only the yarns 3 wound around the core yarn 2 without the carbon yarn 4 being fixed are moved downward. This length is measured by a pair of rotating rollers 31 as interval length measuring means, and is input to the personal computer 30. When this interval length data reaches the length programmed in the personal computer 30 in advance, increased air pressure of the air nozzle 24 to 3kgf / cm ² ~6kgf / cm ² with the rotation roller 23 of the pair is rotated again, it is supplied tip of the carbon fiber 4 in a position twisted yarn 3 is wound again to the core yarn 2 The

  As shown in FIG. 2, the increase / decrease of the air pressure of the air nozzle 24 and the rotation and stop of the pair of rotating rollers 23 as the supply length measuring means are controlled by a control signal sent from the personal computer 30. . By repeating this process, the manufacturing apparatus 21 for the radio wave absorption yarn 1 according to the first embodiment can be easily spun in the same manner as spinning a normal yarn made of a spinnable fiber. To produce a radio wave absorbing yarn 1 that is thin and light like normal yarns made of synthetic fibers and can be woven by a loom just like a spinning fiber, and has a wide absorption band and high radio wave absorption capability. Can do.

  Note that when the air pressure of the air nozzle 24 is increased and the pair of rotating rollers 23 are rotated again, the winding by the winding roller 32 may be temporarily stopped. As a result, there is an advantage that the measurement accuracy of the supply length by the pair of rotating rollers 23 is improved. However, if the data reception by the personal computer 30 as the control means and the transmission of the control signal are accurate, the accuracy of the measurement of the supply length by the pair of rotating rollers 23 will not be reduced. The spinning efficiency of the radio wave absorbing yarn 1 is improved by operating continuously without stopping.

  A specific example of the spinning device according to the invention of claim 18 is the manufacturing device 21 of the radio wave absorbing yarn 1 according to the first embodiment. That is, in the spinning device according to the invention of claim 18, the first yarn is the core yarn 2 according to the first embodiment, the second yarn is the twisted yarn 3 according to the first embodiment, and the third yarn Is the carbon yarn 4 according to the first embodiment. The spinning device according to the invention of claim 18 is not limited to the first embodiment, and any of the first yarn, the second yarn, and the third yarn can be used. .

  Next, a radio wave absorbing fabric formed by weaving the radio wave absorbing yarn 1 and a radio wave absorbing sheet manufactured using the radio wave absorbing fabric will be described with reference to FIG. As shown in FIG. 3 (a), the radio wave absorbing fabric 10 according to the first embodiment is shown in FIG. 1, and the radio wave absorbing yarn 1 manufactured by the manufacturing apparatus 21 of FIG. It is woven vertically and horizontally. Even this radio wave absorbing fabric 10 alone can sufficiently absorb radio waves having a wavelength centered on the wavelength of radio waves of 5.8 GHz (about 25 mm) used in the ETC system over a wide band.

  Furthermore, considering the use in the outdoors etc., as shown in FIG. 3 (b), the electromagnetic wave absorbing fabric 10 is sandwiched from above and below by a polypropylene sheet 11 as a thin organic synthetic resin sheet, and an iron is hung over the entire surface. The upper and lower polypropylene sheets 11 are bonded by heating. As a result, as shown in FIG. 3 (c), the radio wave absorption sheet has radio wave absorption characteristics in a wide band centered on radio waves of 5.8 GHz used in the ETC system, is excellent in water resistance, and is excellent in weather resistance. 12 is produced.

  In this manner, the radio wave absorbing yarn 1, the radio wave absorbing fabric 10, and the radio wave absorbing sheet 12 according to the first embodiment can be easily spun in the same manner as when spinning a normal yarn made of a spinnable fiber. Can be woven with a loom just like a normal yarn made of a spinnable fiber, and can be woven with a loom, and has a wide absorption band and a high radio wave absorption capability. And a radio wave absorbing fabric formed by weaving the radio wave absorbing yarn, and a radio wave absorbing sheet using the radio wave absorbing fabric. In addition, the radio wave absorbing yarn 1 manufacturing apparatus 21 according to the first embodiment can easily spin the radio wave absorbing yarn 1 in the same manner as spinning a normal yarn made of a spinnable fiber.

Embodiment 2
Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4A is a partially enlarged view showing a part of the radio wave absorption yarn according to the second embodiment of the present invention, and FIG. 4B is a part of the radio wave absorption yarn according to the modification of the second embodiment of the present invention. It is the elements on larger scale which expand and show. FIG. 5 (a) is a perspective view showing the appearance of a specimen for measuring the radio wave absorption characteristic of the radio wave absorbing yarn according to the second embodiment of the present invention, and FIG. 5 (b) is the radio wave according to the second embodiment of the present invention. It is a graph which shows the electromagnetic wave absorption characteristic of an absorption yarn.

  As shown in FIG. 4A, the radio wave absorbing yarn 5 according to the second embodiment is coated with polyethylene 6 as an organic synthetic resin over the entire length of the radio wave absorbing yarn 1 according to the first embodiment. It will be. Further, as shown in FIG. 4B, the radio wave absorbing yarn 7 according to the modification of the second embodiment winds the glass fiber 8 over the entire length of the radio wave absorbing yarn 1 according to the first embodiment. Then, polyethylene 6 as an organic synthetic resin is coated over the entire length.

  As a method for coating the polyethylene 6, the radio wave absorbing yarn 1 according to the first embodiment described above or a solution obtained by dissolving the polyethylene 6 in an organic solvent or a melt obtained by heating and melting the polyethylene 6 or FIG. What is necessary is just to immerse what wound the glass fiber 8 over the full length of the electromagnetic wave absorption yarn 1 shown by b).

  When the method of immersing in a polyethylene solution is employed, the organic solvent is removed by lifting and drying, and when the method of immersing in a polyethylene melt is employed, it is lifted and cooled to obtain FIG. The radio wave absorbing yarns 5 and 7 shown in a) and (b) can be obtained. Here, in the radio wave absorption yarn 7 according to the modification of the second embodiment, as shown in FIG. 4B, first, the glass fiber 8 is wound over the entire length of the radio wave absorption yarn 1. Even when immersed in a high-temperature polyethylene melt, the core yarn 2 and the twisted yarn 3 made of polyester fiber as a spinnable fiber do not melt.

  The radio wave absorption yarns 5 and 7 having such a configuration are excellent in water resistance because they are coated with polyethylene 6 over the entire length, and the radio wave absorption fabric formed by weaving the radio wave absorption yarns 5 and 7 is left as it is without being sealed. Can be used outdoors. Thus, by coating the radio wave absorbing yarn 1 with polyethylene 6, the fabric can be woven with a loom just like a spinnable fiber, having excellent radio wave absorption performance and excellent water resistance.

  Next, a test method and test results of the radio wave absorption characteristics of the radio wave absorbing yarn 5 having such a configuration will be described with reference to FIG. As shown in FIG. 5 (a), in order to measure the radio wave absorption characteristics of the radio wave absorption yarn 5 according to the second embodiment, the radio wave absorption yarn 5 is fixed to the surface of a substantially square thin plywood plate 13 vertically and horizontally. The prepared specimen 15 was produced. The vertical and horizontal pitches of the radio wave absorbing yarn 5 were roughened to about 20 mm. The specimen 15 was irradiated with radio waves substantially perpendicularly, and radio wave absorption characteristics were measured by the KEC method. The result is shown in FIG.

  As shown in FIG. 5B, when the radio wave absorption characteristics were measured by irradiating two places on the specimen 15 with radio waves, the peak of radio wave absorption was shown depending on the measurement places as shown by the curves L1 and L2. Although the frequencies were different, all showed large radio wave absorption characteristics of about 35 dB at the maximum. The reason why the peak of the radio wave absorption is shifted depending on the measurement location in this way is considered to be caused by the warp of the thin plywood plate 13, and then the radio wave absorption characteristic is measured while pressing the specimen 15 with another plywood plate. As described above, it was found that the radio wave absorption peak was reduced to about 20 dB, but the frequency band of radio wave absorption was expanded.

  Thus, even if the vertical and horizontal pitches of the radio wave absorption yarn 5 are roughened to about 20 mm, a large radio wave absorption characteristic of about 35 dB can be obtained. Therefore, a radio wave absorption fabric with a finer pitch is woven with the radio wave absorption yarn 5. Thus, it is considered that a larger radio wave absorption characteristic can be obtained.

  In this way, the radio wave absorbing yarns 5 and 7 according to the second embodiment can be spun easily as in the case of spinning a normal yarn made of spinnable fibers, and are made of spinnable fibers. Like normal yarn, it is thin and light, and can be woven with a loom just like a spinning fiber. Moreover, it has a wide absorption band and high radio wave absorption capability, and can be used outdoors.

Embodiment 3
Next, a third embodiment of the present invention will be described with reference to FIGS.

  FIG. 6A is an exploded perspective view showing a method for manufacturing a radio wave absorption structure according to Embodiment 3 of the present invention, and FIG. 6B is a radio wave absorption structure according to the first modification of Embodiment 3 of the present invention. It is a perspective view which shows the whole structure. FIG. 7A is an exploded perspective view showing a method for manufacturing a radio wave absorption structure according to a first modification of the third embodiment of the present invention, and FIG. 7B shows a first modification of the third embodiment of the present invention. It is a perspective view which shows the whole structure of this electromagnetic wave absorption structure. FIG. 8A is an exploded perspective view showing a method for manufacturing a radio wave absorption structure according to a second modification of the third embodiment of the present invention, and FIG. 8B shows a second modification of the third embodiment of the present invention. It is a perspective view which shows the whole structure of this electromagnetic wave absorption structure.

  First, the radio wave absorbing structure and the manufacturing method thereof according to the third embodiment will be described with reference to FIG. As shown in FIG. 6A, the radio wave absorbing fabric 10A used in the radio wave absorbing structure according to the third embodiment is a fluororesin over the entire length of the radio wave absorbing yarn 1 according to the first embodiment. Is woven in a lattice shape with an interval of 5 mm. Here, as a method of coating the fluororesin, a method of removing the solvent by immersing the radio wave absorbing yarn 1 in the fluororesin solution and then removing the solvent may be used, or a method of baking a gaseous fluororesin may be used.

  Furthermore, as shown in FIG. 6A, a stainless steel wire mesh 45 is prepared as a metal mesh having the same dimensions as the radio wave absorbing fabric 10A. Here, the stainless steel wire mesh 45 is preferably made of a stainless steel wire as thin as possible in order to have excellent translucency when overlapped with the radio wave absorbing fabric 10A and to make the other side visible. In addition, since the wire mesh 45 plays a role of reflecting radio waves, the mesh of the wire mesh 45 is preferably finer. In the third embodiment, a stainless steel wire mesh 45 made of a stainless steel wire having a thickness of 0.5 mm and having a mesh size of 2 mm to 3 mm is used.

  As shown in FIG. 6 (b), the radio wave absorbing fabric 10A and the stainless steel wire mesh 45 are respectively attached to both sides of a reinforced plastic frame body 44 so that the thickness of the frame body 44 is only 10 mm. It is configured to face each other with an interval. Thereby, the radio wave absorption structure 43 according to the third embodiment is completed. The radio wave absorbing structure 43 according to the third embodiment having such a configuration is mainly used indoors. For example, a thin wooden board can be pasted on the radio wave absorbing fabric 10A on the upper surface of the radio wave absorbing structure 43 and applied as a structural material (wall panel) for a wall surface of a house.

  Next, a radio wave absorption structure and a manufacturing method thereof according to a first modification of the third embodiment using the radio wave absorption yarn 5 having the configuration according to the second embodiment will be described with reference to FIG. As shown in FIG. 7 (a), two sheets of a frame body 43 made of a thin stainless steel pipe, in which the radio wave absorbing yarn 5 is stretched in parallel with an interval of 2 to 3 mm, are produced. Then, these two sheets are bonded together with a dielectric sheet 44 made of glass fiber interposed therebetween so that the directions of the radio wave absorbing yarns 5 stretched on the frame body 43 are perpendicular to each other.

  The radio wave absorption structure thus manufactured is fixed to the upper surface of a reinforced plastic frame 47 as shown in FIG. 7 (b), and is made of stainless steel as a metal net shown in FIG. 7 (a). The wire mesh 45 is fixed to the bottom surface of the frame body 47. As a result, as shown in FIG. 7B, the radio wave absorption structure 46 according to the fourth embodiment is completed. Since the thickness of the frame 47 is 10 mm, an interval of about 10 mm is generated between the radio wave absorbing structure on the top surface and the stainless steel wire mesh 45 on the bottom surface, which is 5.8 GHz used for the ETC system. This is to absorb the radio waves. The radio wave absorbing structure 46 manufactured in this way is excellent in water resistance due to the use of the radio wave absorbing yarn 5, and can be used without problems even outdoors.

  Next, a radio wave absorption structure and a method for manufacturing the same according to a second modification of the third embodiment will be described with reference to FIG. As shown in FIG. 8A, the radio wave absorption structure 50 used in the radio wave absorption structure according to the second modification of the third embodiment is formed on the frame 43 made of the thin stainless steel pipe described above. The above-described radio wave absorbing yarn 5 is stretched in both vertical and horizontal directions and diagonal directions with an interval of 3 to 4 mm.

  As shown in FIG. 8B, the radio wave absorbing structure 50 and the above-described stainless steel wire mesh 45 are respectively attached to both surfaces of the above-mentioned reinforced plastic frame 47, and the thickness ( 10 mm) so as to be opposed to each other with an interval. Thereby, the radio wave absorption structure 51 according to the second modification example of the third embodiment is completed.

  Here, the stainless steel wire mesh 45 is preferably made of a stainless steel wire as thin as possible in order to have excellent translucency when overlapped with the radio wave absorption structure 50 and to make the other side visible. In addition, since the wire mesh 45 plays a role of reflecting radio waves, the mesh of the wire mesh 45 is preferably finer. In the second modification of the third embodiment, a stainless steel wire mesh 45 made of a stainless steel wire having a thickness of 0.5 mm and having a mesh size of 2 mm to 3 mm is used. In the second modification of the third embodiment, the thickness of the frame body 47 is set to 10 mm, which is to absorb 5.8 GHz radio waves used in the ETC system.

Embodiment 4
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 9A is a perspective view showing a structure of a radio wave absorption structure according to Embodiment 4 of the present invention, and FIG. 9B is a perspective view showing an example of use of the radio wave absorption structure at a tollgate on an expressway.

  As shown in FIG. 9A, the radio wave absorbing structure 52 according to the fourth embodiment is coated with the polyethylene 6 according to the second embodiment on the outer peripheral surface of a vinyl chloride pipe 54 as a plastic pipe. The electromagnetic wave absorbing yarn 5 is wound and fixed at a constant pitch in the Z direction and the S direction, and the inside of the vinyl chloride pipe 54 is fitted to both ends of the vinyl chloride pipe 54 through an aluminum pipe 55 as a metal pipe. By being inserted into the cap 56, it is supported so as to be positioned along the center line of the vinyl chloride pipe 54.

  The radio wave incident on the radio wave absorption structure 52 having such a structure is first partially absorbed by the radio wave absorbing yarn 5 on the outer peripheral surface of the vinyl chloride pipe 54 and reflected by the aluminum pipe 55 inside the vinyl chloride pipe 54. It is absorbed again by the radio wave absorbing yarn 5 on the outer peripheral surface. As a result, radio waves incident from any direction with respect to the radio wave absorption structure 52 can be strongly absorbed, and excellent radio wave absorption performance is exhibited.

  The inner diameter of the vinyl chloride pipe 54 (more precisely, the distance from the surface of the inner aluminum pipe 55 to the radio wave absorbing yarn 5 on the outer peripheral surface) and the pitch around which the radio wave absorbing yarn 5 is wound are set in accordance with the wavelength of the radio wave to be absorbed. By setting, it is possible to efficiently absorb a radio wave having a target wavelength. In the fourth embodiment, the pitch is 10 mm, and the distance from the surface of the aluminum pipe 55 to the radio wave absorbing yarn 5 on the outer peripheral surface is set to 10 mm.

  Next, a usage example of the radio wave absorption structure 52 having such a structure will be described with reference to FIG. As shown in FIG. 9B, two ETC gates G are installed adjacent to each other at the toll gate TG on the highway. Between these two ETC gates G, a radio wave absorption structure according to a modification of the fourth embodiment, in which a plurality of radio wave absorption structures 52 according to the fourth embodiment are arranged at regular intervals in the horizontal direction. A body 60 is installed and functions to prevent crosstalk of radio waves.

  In the radio wave absorption structure 60 according to the modification of the fourth embodiment, a pair of support columns 61 are erected on the bottom plate 62, and a plurality of radio wave absorption structure bodies are provided between the pair of support columns 61. 52 is supported horizontally at regular intervals in the vertical direction. Since the radio wave absorption structure 60 is composed of a plurality of radio wave absorption structures 52, the radio wave incident from any direction can be strongly absorbed. Since there is a space in the vertical direction, the driver of the automobile V passing through the ETC gate G can see the movement of the automobile V passing through the adjacent ETC gate G well.

  In the fourth embodiment, an opaque vinyl chloride pipe 54 is used as a plastic pipe constituting the radio wave absorption structure 52. However, a transparent pipe such as a transparent acrylic resin pipe is used as the plastic pipe. By using it, the movement of the automobile V passing through the adjacent ETC gate G can be seen well.

Embodiment 5
Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 10 is a partial perspective view showing a state in which the electromagnetic wave shielding yarn according to the fifth embodiment of the present invention is wound around a high voltage electric wire. As shown in FIG. 10, in the fifth embodiment, an electromagnetic wave shielding yarn 71 having the same structure as the electromagnetic wave absorbing yarn 1 manufactured by the manufacturing method according to the first embodiment is used as the electromagnetic wave shielding yarn. ing.

  The electromagnetic wave can be shielded by winding the electromagnetic wave shielding yarn 71 having the same structure as the radio wave absorbing yarn 1 of Embodiment 1 around a target to be electromagnetic wave shielded at a predetermined pitch. As a specific application, for example, when a normal power line is used for communication in high-speed power line communication (PLC), leakage of radio waves from the power line becomes a problem. By winding, it is possible to reliably prevent such leakage of radio waves.

  In the fifth embodiment, as shown in FIG. 10, when the high voltage electric wire 70 is used as a PLC communication line by winding the electromagnetic wave shielding thread 71 around the high voltage electric wire 70 at a predetermined pitch, It is possible to reliably prevent radio waves from leaking. Here, the power line including the high-voltage electric wire 70 is not a flat plate but has a long cylindrical three-dimensional shape. In the case of a flat plate, for example, an electromagnetic wave can be shielded even by pasting a thin metal foil, but in the case of a three-dimensional shape such as a power line, the fifth embodiment is used. The electromagnetic wave cannot be shielded unless a cut conductor such as the electromagnetic wave shielding thread 71 is disposed.

  In the fifth embodiment, the electromagnetic wave shielding yarn 71 (radio wave absorbing yarn 1) manufactured using the radio wave absorbing yarn manufacturing apparatus 21 according to the first embodiment is used as the electromagnetic wave shielding yarn. Therefore, the radio wave absorbing yarn manufacturing apparatus 21 becomes an electromagnetic shielding yarn manufacturing apparatus as it is. Further, the method for manufacturing the radio wave absorbing yarn according to the first embodiment is directly used as the method for manufacturing the electromagnetic wave shielding yarn.

  In the fifth embodiment, an electromagnetic wave shield having the same structure as the radio wave absorbing yarn 1 shown in FIG. 1 manufactured using the radio wave absorbing yarn manufacturing apparatus 21 according to the first embodiment as an electromagnetic wave shielding yarn. Although the example using the thread | yarn 71 was demonstrated, various electromagnetic wave shield thread | yarn can be used besides this.

  For example, an organic synthetic resin or rubber or elastomer coated over the entire length of the electromagnetic shielding yarn 71, or an organic synthetic resin or rubber over the entire length of the electromagnetic shielding yarn 71 after winding the glass fiber Those formed by coating an elastomer, those formed by coating a fluororesin over the entire length of the electromagnetic shielding yarn 71, and the like. That is, the radio wave absorbing yarns 5 and 7 according to the second embodiment described above can also be used as electromagnetic shielding yarns as they are.

  In each of the above embodiments, the case where the core yarn 2 and the twisted yarn 3 using polyester fiber as the spinnable fiber and the carbon yarn 4 made of carbon fiber is used has been described. In addition, transparent polyester fibers, cotton, silk, hemp, wool, nylon, vinylon, acrylic fibers, vinylidene chloride fibers, organic fibers such as acetate and rayon, inorganic fibers such as glass fibers, or these fibers may be mixed. it can.

  In addition to the carbon yarn 4 made of carbon fiber, a metal wire such as a copper wire, a plated copper wire, and a stainless wire can also be used. Here, the thickness of the metal wire is preferably in the range of 30 μm to 120 μm.

  Further, in each of the above-described embodiments, the radio wave absorbing sheet 12 is described in which the radio wave absorbing fabric is sandwiched between two transparent thin organic synthetic resin sheets with a vinyl sheet 11 having a thickness of about 0.1 mm. In addition to these, those having various configurations such as a thin rubber sheet or an adhesive sheet sandwiched between elastomer sheets can be used. For example, a radio wave absorption fabric in which the radio wave absorption fabric 10 is sandwiched and bonded between two transparent thin rubber sheets or elastomer sheets, or two or more radio wave absorption fabrics 10 are stacked and sandwiched between two thin organic synthetic resin sheets. A sheet, a radio wave absorbing sheet in which two or more sheets of radio wave absorbing fabrics having different textures are stacked and sandwiched between two thin organic synthetic resin sheets.

  The structure, shape, quantity, material, thickness, thickness, size, connection relationship, etc. of other parts of the electromagnetic wave absorbing yarn, electromagnetic wave absorbing fabric, electromagnetic wave absorbing sheet, electromagnetic wave absorbing structure, electromagnetic wave shielding yarn, Regarding the configuration, shape, quantity, material, thickness, thickness, size, connection relationship, etc. of other parts of the absorbent yarn manufacturing apparatus, and other steps of the method of manufacturing an electromagnetic wave absorbing yarn, The form is not limited.

FIG. 1A is a partial plan view showing the appearance of a part of the radio wave absorbing yarn according to the first embodiment of the present invention, FIG. 1B is a partially enlarged view of the radio wave absorbing yarn, and FIG. It is an enlarged view. FIG. 2 is a schematic diagram showing the overall configuration of the radio wave absorbing yarn manufacturing apparatus according to the first embodiment of the present invention. FIG. 3A is a perspective view showing the entire configuration of the radio wave absorption fabric according to the first embodiment of the present invention, and FIG. 3B is a perspective view showing the method for manufacturing the radio wave absorption sheet according to the first embodiment of the present invention. (C) is a perspective view which shows the whole structure of the electromagnetic wave absorption sheet concerning Embodiment 1 of this invention. FIG. 4A is a partially enlarged view showing a part of the radio wave absorption yarn according to the second embodiment of the present invention, and FIG. 4B is a part of the radio wave absorption yarn according to the modification of the second embodiment of the present invention. It is the elements on larger scale which expand and show. FIG. 5 (a) is a perspective view showing the appearance of a specimen for measuring the radio wave absorption characteristic of the radio wave absorbing yarn according to the second embodiment of the present invention, and FIG. 5 (b) is the radio wave according to the second embodiment of the present invention. It is a graph which shows the electromagnetic wave absorption characteristic of an absorption yarn. FIG. 6A is an exploded perspective view showing a method for manufacturing a radio wave absorption structure according to Embodiment 3 of the present invention, and FIG. 6B is a radio wave absorption structure according to the first modification of Embodiment 3 of the present invention. It is a perspective view which shows the whole structure. FIG. 7A is an exploded perspective view showing a method for manufacturing a radio wave absorption structure according to a first modification of the third embodiment of the present invention, and FIG. 7B shows a first modification of the third embodiment of the present invention. It is a perspective view which shows the whole structure of this electromagnetic wave absorption structure. FIG. 8A is an exploded perspective view showing a method for manufacturing a radio wave absorption structure according to a second modification of the third embodiment of the present invention, and FIG. 8B shows a second modification of the third embodiment of the present invention. It is a perspective view which shows the whole structure of this electromagnetic wave absorption structure. FIG. 9A is a perspective view showing a structure of a radio wave absorption structure according to Embodiment 4 of the present invention, and FIG. 9B is a perspective view showing an example of use of the radio wave absorption structure at a tollgate on an expressway. FIG. 10 is a partial perspective view showing a state in which the electromagnetic wave shielding yarn according to the fifth embodiment of the present invention is wound around a high voltage electric wire.

Explanation of symbols

1, 1A, 5, 7 Electromagnetic wave absorbing yarn 2 Core yarn 3 Twisted yarn 4 Carbon yarn 6 Organic synthetic resin 8 High dielectric constant fiber 10, 10A Radio wave absorbing fabric 11 Organic synthetic resin sheet 12 Radio wave absorbing sheet 21 Radio wave absorbing yarn manufacturing apparatus 22 Radio wave absorber supplying means 23 Supply length measuring means 24 Air nozzle 25 Cutting means 26 Core yarn supplying means 27 Twist yarn supplying means 28 Spindle 29 Rotating motor 30 Control means 31 Spacing length measuring means 32 Radio wave absorbing yarn winding means 41, 46 , 50, 51, 52, 60 Radio wave absorbing structure 45 Metal frame 47 Frame 54 Plastic pipe 55 Metal pipe 56 Cap 70 High-voltage electric wire 71 Electromagnetic shield yarn G ETC gate V Automobile

Claims (25)

A core yarn made of a spinnable fiber, a carbon fiber of random length or a metal wire of a random length made of carbon fiber arranged at intervals with respect to the core yarn, and the spinnable fiber. A twisted yarn,
A carbon fiber having a random length made of the carbon fiber or a metal wire having a random length is spaced along the core yarn by the twisted yarn made of the spinnable fiber at an interval from the core yarn made of the spinnable fiber. An electromagnetic wave absorbing yarn characterized by being integrally fixed. A core yarn made of a spinnable fiber, a carbon fiber of random length or a metal wire of a random length made of carbon fiber arranged at intervals with respect to the core yarn, and the spinnable fiber. A twisted yarn,
While continuously twisting the twisted yarn made of the spinnable fiber around the core yarn made of the spinnable fiber, the carbon yarn cut into the random length made of the carbon fiber at an interval or the random length The cut metal wire is supplied along the core yarn, and the cut carbon yarn or the cut metal wire is integrally fixed along the core yarn by the twisted yarn. An electromagnetic wave absorbing yarn.   3. A radio wave absorbing yarn obtained by coating the radio wave absorbing yarn according to claim 1 or 2 with an organic synthetic resin, rubber or elastomer over its entire length.   3. A radio wave absorption comprising: winding a fiber having a high dielectric constant over the entire length of the radio wave absorption yarn according to claim 1 or 2; and coating an organic synthetic resin, rubber or elastomer over the entire length. yarn.   An electromagnetic wave absorbing yarn comprising a fluororesin coated over the entire length of the electromagnetic wave absorbing yarn according to claim 1 or 2.   6. A radio wave absorbing fabric comprising the radio wave absorbing yarn according to claim 1 woven.   6. A radio wave absorbing fabric comprising the radio wave absorbing yarn according to any one of claims 1 to 5 and a yarn made of the spinnable fiber.   One or two or more of the radio wave absorbing fabrics according to claim 6 or 7 are stacked and sandwiched between two thin organic synthetic resin sheets, rubber sheets, or elastomer sheets to form a sheet. An electromagnetic wave absorbing sheet.   The radio wave absorbing fabric according to claim 6 or 7, wherein two or more sheets having different weave textures of the radio wave absorbing yarn are stacked and sandwiched between two thin organic synthetic resin sheets, rubber sheets or elastomer sheets. A radio wave absorption sheet characterized by being formed into a sheet shape by thermocompression bonding.   10. The radio wave absorption according to claim 8, wherein the radio wave absorbing fabric has a coarse texture of 1 mm to 200 mm, and the two thin organic synthetic resin sheets, rubber sheets, or elastomer sheets are transparent. Sheet.   Two pieces of the electromagnetic wave absorbing yarn according to any one of claims 1 to 5 stretched in parallel with each other at a predetermined interval on a frame, and stretched together with a dielectric sheet in between. The radio wave absorption yarns are stacked so as to be vertical, or the radio wave absorption yarns according to any one of claims 1 to 5 are stretched across a frame in both vertical and horizontal directions and / or diagonal directions. An electromagnetic wave absorbing structure characterized by.   A radio wave absorbing yarn according to any one of claims 1 to 5 is wound around and fixed in a Z direction and an S direction at a predetermined pitch on an outer peripheral surface of a plastic pipe having a predetermined inner diameter, and the plastic pipe An electromagnetic wave absorbing structure comprising: a metal rod or a metal pipe supported by caps fixed to both ends of the plastic pipe along a center line of the plastic pipe.   A radio wave absorption structure comprising a plurality of the radio wave absorption structures according to claim 12 arranged in parallel at predetermined intervals. A yarn twisting step of continuously winding a twisted yarn made of a spinnable fiber around a core yarn made of a spinnable fiber;
A radio wave absorber supplying step for supplying a carbon yarn or a metal wire made of carbon fiber along the core yarn in parallel with the yarn twisting step;
A cutting step of cutting the carbon yarn or metal wire supplied by the radio wave absorber supply step into random lengths,
A method of manufacturing a radio wave absorbing yarn, wherein the yarn twisting step, the radio wave absorber supplying step, and the cutting step are repeated. A core yarn supplying means for supplying a core yarn around which a core yarn made of a spinnable fiber is wound;
A twisted yarn supply means for winding a twisted yarn made of a spinnable fiber and supplying the twisted yarn;
A spindle with a rotary motor for rotating the twisted yarn supplying means, wherein the twisted yarn supplied from the twisted yarn supplying means is added to the core yarn supplied from the core yarn supplying means by rotating the twisted yarn supplying means. A spindle that winds in the vicinity of the upper end of the spindle and guides it downward through a through-hole penetrating from the upper end to the lower end of the spindle;
A radio wave absorber supplying means for supplying a carbon yarn or a metal wire as a radio wave absorber as a radio wave absorber or a metal wire as a radio wave absorber, and supplying the tip of the carbon yarn or the metal wire to the vicinity of the upper end of the spindle;
An air nozzle through which the carbon yarn or the metal wire penetrates and sends the tip of the carbon yarn or the metal wire to a position where the twisted yarn is wound around the core yarn in the vicinity of the upper end of the spindle;
Cutting means for cutting the carbon yarn or the metal wire provided between the upper end of the spindle and the air nozzle;
A supply length measuring means for measuring a supply length of the carbon yarn or the metal wire;
When the supply length data of the carbon yarn or the metal wire measured by the supply length measuring means is input, and when the input supply length data reaches a preprogrammed random length A control means for operating the cutting means to cut the carbon yarn or the metal wire;
A radio wave absorption yarn winding means for winding the carbon yarn cut to the random length by the twisted yarn or the radio wave absorption yarn around which the metal wire is wound around the core yarn provided below the spindle;
Interval length measuring means for measuring the length of the portion of the electromagnetic wave absorbing yarn wound around the carbon yarn or the metal wire provided between the spindle and the electromagnetic wave absorbing yarn winding means. Equipped,
The control means operates the cutting means and simultaneously stops the supply length measuring means and lowers the air pressure of the air nozzle,
Data on the length of the portion of the radio wave absorbing yarn wound without winding the carbon yarn or the metal wire from the interval length measuring unit is input to the control unit, and the input data is programmed in advance. The apparatus for producing a radio wave absorbing yarn, wherein when the random length is reached, the supply length measuring means is rotated again and the air pressure of the air nozzle is increased.   6. The random length according to claim 1, wherein the random length is within a range of ± 1 mm to ± 10 mm of a half length of a wavelength of the radio wave to be absorbed by the radio wave absorbing yarn. The radio wave absorbing yarn according to claim 1, the radio wave absorbing yarn manufacturing method according to claim 14, or the radio wave absorbing yarn manufacturing apparatus according to claim 15.   17. The radio wave absorbing yarn and the radio wave absorbing yarn according to claim 1, wherein the metal wire is a stainless steel wire or a galvanized copper wire. Manufacturing method or radio wave absorbing yarn manufacturing device. A first yarn supplying means for supplying the first yarn, the first yarn being wound around;
A second yarn supplying means for supplying the second yarn, around which a second yarn is wound;
A spindle with a rotary motor for rotating the second yarn supply means, wherein the first yarn supplied from the first yarn supply means by rotating the second yarn supply means is added to the first yarn. A spindle for winding the second yarn supplied from the second yarn supply means in the vicinity of the upper end of the spindle and guiding it downward through a through hole penetrating from the upper end to the lower end of the spindle;
A third yarn supplying means for winding a third yarn and supplying the tip of the third yarn to the vicinity of the upper end of the spindle;
An air nozzle that passes through the third yarn and feeds the tip of the third yarn to a position where the second yarn is wound around the first yarn near the upper end of the spindle;
Cutting means for cutting the third yarn provided between the upper end of the spindle and the air nozzle;
Supply length measuring means for measuring the supply length of the third yarn;
Data on the supply length of the third yarn measured by the supply length measuring means is input, and when the input data on the supply length reaches a pre-programmed random length, the data Control means for operating the cutting means to cut the third yarn;
A winding means for winding a thread in which the third thread cut to the random length by the second thread is wound around the first thread provided below the spindle;
An interval length measuring means for measuring a length of a portion of the third yarn provided between the spindle and the winding means that is wound without being wound;
The control means operates the cutting means and simultaneously stops the supply length measuring means and lowers the air pressure of the air nozzle,
Data on the length of the portion wound without winding the third yarn from the interval length measuring means is input to the control means, and the input data has reached a preprogrammed random length. The spinning device characterized in that, at the time, the supply length measuring means is rotated again and the air pressure of the air nozzle is increased. A core yarn made of a spinnable fiber, a carbon fiber of random length or a metal wire of a random length made of carbon fiber arranged at intervals with respect to the core yarn, and the spinnable fiber. A twisted yarn,
A carbon fiber having a random length made of the carbon fiber or a metal wire having a random length is spaced along the core yarn by the twisted yarn made of the spinnable fiber at an interval from the core yarn made of the spinnable fiber. An electromagnetic shielding yarn characterized by being integrally fixed. A core yarn made of a spinnable fiber, a carbon fiber of random length or a metal wire of a random length made of carbon fiber arranged at intervals with respect to the core yarn, and the spinnable fiber. A twisted yarn,
While continuously twisting the twisted yarn made of the spinnable fiber around the core yarn made of the spinnable fiber, the carbon yarn cut into the random length made of the carbon fiber at an interval or the random length The cut metal wire is supplied along the core yarn, and the cut carbon yarn or the cut metal wire is integrally fixed along the core yarn by the twisted yarn. Electromagnetic shielding yarn.   21. An electromagnetic shielding yarn obtained by coating the electromagnetic shielding yarn according to claim 19 or 20 with an organic synthetic resin, rubber, or elastomer over its entire length.   21. An electromagnetic wave shield comprising an electromagnetic synthetic fiber, a rubber, or an elastomer coated over the entire length after winding a fiber having a high dielectric constant over the entire length of the electromagnetic shield yarn according to claim 19 or 20. yarn.   21. An electromagnetic wave shielding yarn obtained by coating a fluororesin over the entire length of the electromagnetic wave shielding yarn according to claim 19 or 20. A yarn twisting step of continuously winding a twisted yarn made of a spinnable fiber around a core yarn made of a spinnable fiber;
In parallel with the yarn twisting step, an electromagnetic shielding material supply step for supplying a carbon yarn or a metal wire made of carbon fiber along the core yarn,
A cutting step of cutting the carbon yarn or metal wire supplied by the electromagnetic shielding material supply step into random lengths,
The method for producing an electromagnetic shielding yarn, wherein the yarn twisting step, the electromagnetic shielding material supply step, and the cutting step are repeated. A core yarn supplying means for supplying a core yarn around which a core yarn made of a spinnable fiber is wound;
A twisted yarn supply means for winding a twisted yarn made of a spinnable fiber and supplying the twisted yarn;
A spindle with a rotary motor for rotating the twisted yarn supplying means, wherein the twisted yarn supplied from the twisted yarn supplying means is added to the core yarn supplied from the core yarn supplying means by rotating the twisted yarn supplying means. A spindle that winds in the vicinity of the upper end of the spindle and guides it downward through a through-hole penetrating from the upper end to the lower end of the spindle;
An electromagnetic shielding material supply means for winding a carbon yarn made of carbon fiber as an electromagnetic shielding material or a metal wire as an electromagnetic shielding material and supplying the tip of the carbon yarn or the metallic wire to the vicinity of the upper end of the spindle;
An air nozzle through which the carbon yarn or the metal wire penetrates and sends the tip of the carbon yarn or the metal wire to a position where the twisted yarn is wound around the core yarn in the vicinity of the upper end of the spindle;
Cutting means for cutting the carbon yarn or the metal wire provided between the upper end of the spindle and the air nozzle;
A supply length measuring means for measuring a supply length of the carbon yarn or the metal wire;
When the supply length data of the carbon yarn or the metal wire measured by the supply length measuring means is input, and when the input supply length data reaches a preprogrammed random length A control means for operating the cutting means to cut the carbon yarn or the metal wire;
An electromagnetic shielding yarn winding means for winding up the electromagnetic shielding electromagnetic wave absorbing yarn in which the carbon yarn or the metal wire wound around the random length by the twisted yarn is wound around the core yarn provided below the spindle;
Interval length measuring means for measuring a length of the portion of the electromagnetic wave shielding yarn wound around the carbon yarn or the metal wire provided between the spindle and the electromagnetic wave shielding yarn winding means. Equipped,
The control means operates the cutting means and simultaneously stops the supply length measuring means and lowers the air pressure of the air nozzle,
Data on the length of the portion of the electromagnetic shielding yarn wound without winding the carbon yarn or the metal wire from the interval length measuring means is input to the control means, and the input data is programmed in advance. An apparatus for producing an electromagnetic wave shielding yarn, wherein the supply length measuring means is rotated again when the random length is reached and the air pressure of the air nozzle is increased.

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