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WO2024203055A1 - Bande de transport et toile de bande - Google Patents

Bande de transport et toile de bande Download PDF

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Publication number
WO2024203055A1
WO2024203055A1 PCT/JP2024/008435 JP2024008435W WO2024203055A1 WO 2024203055 A1 WO2024203055 A1 WO 2024203055A1 JP 2024008435 W JP2024008435 W JP 2024008435W WO 2024203055 A1 WO2024203055 A1 WO 2024203055A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyor belt
belt
canvas
threads
weft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/008435
Other languages
English (en)
Japanese (ja)
Inventor
幸貴 森本
佑紀 佐藤
亮人 大井
優太 鈴木
颯 内藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitta Corp
Original Assignee
Nitta Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nitta Corp filed Critical Nitta Corp
Publication of WO2024203055A1 publication Critical patent/WO2024203055A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B65G15/34—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric

Definitions

  • the present invention relates to conveyor belts and canvas for belts.
  • conveyor belts have been made of, for example, a single layer of resin, or one that uses a core such as canvas.
  • Conveyor belts made of a single layer of resin are easy to stretch and are therefore used in roller conveyors such as BOR (Belt on Roller). Conveyor belts made of a single layer of resin have low tension and therefore cannot be used to transport heavy objects, and due to their low lateral rigidity they are prone to wrinkling when attached to a conveyor. Conveyor belts made of a single layer of resin have low tension and so place little strain on the machine due to axial load.
  • Conveyor belts that use a core such as canvas have a high tension, unlike conveyor belts made of a single layer of resin, and can be used to transport heavy objects.
  • a core such as canvas
  • monofilament for the weft of the canvas lateral rigidity can be ensured, making it less likely to wrinkle when attached to a conveyor.
  • the high tension can cause the axial load to become too large, placing a heavy burden on the machine.
  • the tension when the conveyor belt is attached may increase or decrease, making it impossible to transport or damaging the machine.
  • Patent Document 1 discloses a composite belt that includes a resin layer, a core layer made of woven fabric, and an adhesive layer that bonds the core layer and the resin layer.
  • Patent Document 2 discloses a conveyor belt in which a woven fabric is embedded in the belt so that the warp threads are aligned along the longitudinal direction, with the warp threads and weft threads crossed so that they overlap one another and entangled with a binder thread.
  • the present invention was made in consideration of the above points, and aims to provide a conveyor belt that can simultaneously transport heavy objects and reduce the load on the machine due to the size of the axle load, and a canvas for the belt that can be used for the belt.
  • the conveyor belt according to the present invention is a conveyor belt having a belt canvas and a resin layer laminated on at least one of one side and the other side of the belt canvas, and the belt canvas is provided with a plurality of straight warp threads extending in the length direction of the conveyor belt and made of monofilaments of an elastic material, a plurality of straight first weft threads extending in a direction intersecting the warp threads on one side of the conveyor belt and made of a material with lower elasticity than the warp threads, a plurality of straight second weft threads extending in a direction intersecting the warp threads on the other side of the conveyor belt and made of a material with lower elasticity than the warp threads, and a plurality of binder threads extending in the same direction as the warp threads and connecting the warp threads, the first weft threads, and the second weft threads.
  • the canvas for belts is a canvas used for conveyor belts, and comprises a plurality of straight warp threads that extend in the length direction of the conveyor belt and are made of monofilaments of an elastic material, a plurality of straight first weft threads that extend in a direction intersecting the warp threads on one side of the conveyor belt and are made of a material with lower elasticity than the warp threads, a plurality of straight second weft threads that extend in a direction intersecting the warp threads on the other side of the conveyor belt and are made of a material with lower elasticity than the warp threads, and a plurality of binder threads that extend in the same direction as the warp threads and connect the warp threads, the first weft threads, and the second weft threads.
  • the present invention makes it possible to transport heavy objects while reducing the load on the machine due to the magnitude of the axle load.
  • FIG. 2 is a plan view of a belt canvas used in the conveyor belt according to the embodiment.
  • FIG. 2 is a cross-sectional view showing a schematic cross section of the belt canvas shown in FIG. 1.
  • 1 is a cross-sectional view of a conveyor belt according to an embodiment of the present invention.
  • 4 is a graph showing tension versus elongation rate of the conveyor belt according to the first example.
  • 5 is a graph showing tension versus elongation rate, with the portion of the graph in FIG. 4 from 0% to 5% elongation rate enlarged.
  • 13 is a graph showing tension versus elongation rate of the belt canvas according to the second embodiment.
  • 7 is a graph showing tension versus elongation rate, with the portion of the graph in FIG. 6 from 0% to 5% elongation rate enlarged.
  • Fig. 1 is a plan view of the belt canvas 10 used in the conveyor belt 1 according to the embodiment.
  • Fig. 2 is a cross-sectional view showing a schematic cross section of the belt canvas 10 shown in Fig. 1.
  • the belt canvas 10 is a canvas used in the conveyor belt 1, and is formed in a strip shape stretched in the length direction of the conveyor belt 1.
  • the belt canvas 10 has warp threads 11, a first weft thread 12, a second weft thread 13, and a binder thread 14.
  • the warp threads 11 extend in the length direction of the conveyor belt 1, are made of monofilaments of an elastic material, and have a straight shape. Multiple warp threads 11 are arranged in parallel.
  • the warp threads 11 are made of, for example, copolymer polyester or polyurethane, and specifically, polyether polyester copolymer.
  • the fiber diameter of the warp threads 11 is, for example, 500 dtex to 2000 dtex, specifically 1100 dtex.
  • 60 to 200 warp threads 11, specifically 166 warp threads 11 are arranged per 10 cm in the width direction of the conveyor belt 1.
  • the first weft threads 12 extend in a direction intersecting the warp threads 11 on one side of the conveyor belt 1, are made of a material with lower elasticity than the warp threads 11, and have a straight shape. A plurality of first weft threads 12 are arranged in parallel.
  • the first weft threads 12 are made of monofilament or multifilament, and are preferably made of monofilament.
  • the first weft threads 12 are made of, for example, polyester such as polyethylene terephthalate (PET) or polybutylene terephthalate, or polyamide such as PA6 or PA66.
  • the fiber diameter of the first weft threads 12 is, for example, 500 dtex to 2000 dtex, specifically 1100 dtex.
  • the first weft threads 12 are arranged, for example, 50 to 170 threads, specifically 111 threads, per 10 cm in the length direction of the conveyor belt 1.
  • the second weft threads 13 extend in a direction intersecting the warp threads 11 on the other side of the conveyor belt 1, are made of a material with lower elasticity than the warp threads 11, and have a straight shape. A plurality of second weft threads 13 are arranged in parallel.
  • the second weft threads 13 are made of monofilament or multifilament, and are preferably made of multifilament.
  • the second weft threads 13 are made of, for example, the same material as the first weft threads 12.
  • the fiber diameter of the second weft threads 13 is, for example, 500 dtex to 2000 dtex, specifically 1100 dtex.
  • the second weft threads 13 are arranged, for example, 50 to 170 threads, specifically 111 threads, per 10 cm in the longitudinal direction of the conveyor belt 1.
  • the binder threads 14 extend in the same direction as the warp threads 11 and are arranged to connect the warp threads 11, the first weft threads 12, and the second weft threads 13. A plurality of binder threads 14 are arranged in parallel.
  • the binder threads 14 are made of monofilament or multifilament, and are preferably made of multifilament.
  • the binder threads 14 are made of, for example, the same material as the first weft threads 12.
  • the fiber diameter of the binder threads 14 is, for example, 500 dtex to 2000, specifically 1100 dtex. For example, 100 to 200 binder threads, specifically 166, are arranged per 10 cm in the width direction of the conveyor belt 1.
  • the thickness of the belt canvas 10 is, for example, 0.7 mm to 1.5 mm, specifically 1.1 mm.
  • the belt canvas 10 has a straight warp structure using four types of thread as described above.
  • the warp threads 11 are made of an elastic material, which allows the tension of the belt canvas 10 to be reduced.
  • the binder threads 14 are arranged to create large projections and recesses in order to connect the warp threads 11, the first weft thread 12, and the second weft thread 13, which allows the tension of the belt canvas 10 to be reduced in the low stretch range. If the first weft thread 12 is made of monofilament, the lateral rigidity of the belt canvas 10 can be ensured.
  • the side of the belt canvas 10 on which the first weft 12 made of hard monofilament is arranged is the placement surface
  • the side of the belt canvas 10 on which the second weft 13 made of soft multifilament is arranged is the surface that comes into contact with the pulley.
  • the conveyor belt 1 As shown in FIG. 3, the conveyor belt 1 according to this embodiment has the above-mentioned belt canvas 10 formed in a belt shape and a belt-shaped resin layer 20 laminated on one side of the belt canvas 10.
  • the resin layer 20 is formed from a thermoplastic resin material such as thermoplastic polyurethane or polyvinyl chloride.
  • the resin layer 20 is provided so as to form the support surface of the belt canvas 10 on the side on which the first weft thread 12 is arranged.
  • the resin layer 20 may be provided so as to form the surface of the belt canvas 10 on the side on which the second weft thread 13 is arranged that comes into contact with the pulley.
  • the thickness of the resin layer 20 is, for example, 0.5 mm to 3.0 mm, specifically 1.0 mm.
  • the thickness of the conveyor belt 1, which is the sum of the thickness of the belt canvas 10 and the thickness of the resin layer 20, is, for example, 1.5 mm to 5.0 mm, specifically 2.1 mm.
  • the tension of the conveying belt 1 is preferably 0.5 N/mm or more and 4 N/mm or less when the conveying belt 1 has an elongation rate of 2%. Also, the tension of the conveying belt 1 is preferably 1 N/mm or more and 6 N/mm or less when the conveying belt 1 has an elongation rate of 3%.
  • the conveyor belt 1 is formed into an endless shape by joining the belt ends together, and is stretched over multiple pulleys.
  • the conveyor belt 1 is arranged, for example, so that the transported object is placed on the outer surface of the resin layer 20 and the pulley is in contact with the outer surface of the belt canvas 10, and the conveyor belt 1 rotates and moves as the pulley rotates, moving the transported object placed on the outer surface of the resin layer 20.
  • the transported object may be placed on the outer surface of the belt canvas 10 and the pulley may be in contact with the outer surface of the resin layer 20.
  • the conveyor belt 1 shown in FIG. 3 has a resin layer 20 laminated on one side of the belt canvas 10, but the belt canvas 10 may have a resin layer 20 laminated on both sides.
  • the object to be conveyed is placed on the outer surface of the resin layer 20 provided on one side of the belt canvas 10 on which the first weft thread 12 is arranged, and the belt canvas 10 is used by being positioned so that the pulley is in contact with the outer surface of the resin layer 20 provided on the other side of the belt canvas 10 on which the second weft thread 13 is arranged.
  • the belt canvas 10 itself without the resin layer 20 formed thereon may be used as the conveyor belt.
  • the material to be conveyed is placed on one side of the belt canvas 10 on which the first weft thread 12 is arranged, and the belt canvas 10 is used by being arranged so that a pulley is in contact with the other side of the belt canvas 10 on which the second weft thread 13 is arranged.
  • the conveyor belt 1 according to this embodiment is not limited to a particular diameter for the pulley over which the endless conveyor belt 1 is passed, but can also be applied to a small diameter pulley, for example, with a diameter of 25 mm.
  • the conveyor belt 1 can be manufactured by any method, such as a method of manufacturing the conveyor belt 1 by adhering the resin layer 20 to the surface of the belt canvas 10 by any method, as long as the method does not cause the belt canvas 10 and the resin layer 20 to peel off from each other.
  • the belt canvas 10 and the resin layer 20 may be bonded to each other using an adhesive or by bonding under heat and pressure.
  • the conveyor belt 1 has a belt canvas 10 having a plurality of straight warp threads 11 that extend in the length direction of the conveyor belt 1 and are made of monofilaments of an elastic material, a plurality of straight first weft threads 12 and second weft threads 13 that extend in a direction intersecting the warp threads 11 on one and the other sides of the conveyor belt 1 and are made of a material with lower elasticity than the warp threads 11, and a plurality of binder threads 14 that connect them.
  • the conveyor belt 1 having the above configuration can achieve a tension higher than that of a conveyor belt made of a single resin layer, particularly in the low elongation range, and lower than that of a conventional conveyor belt that uses a canvas formed of filaments of a low elasticity material as a core. This makes it possible to transport heavy objects and reduce the load on the machine due to the magnitude of the axial load.
  • the conveyor belt 1 configured as described above can reduce the amount of change in tension relative to the elongation rate in the low elongation range.
  • the lateral rigidity of the conveyor belt 1 can be increased and the occurrence of wrinkles can be suppressed.
  • the conveyor belt 1 according to the example is an endless belt having a width of 20 mm, and is obtained by laminating a belt canvas 10 having a thickness of 1.1 mm and a resin layer 20 made of polyvinyl chloride having a thickness of 1.0 mm.
  • the belt canvas 10 is made of a monofilament warp thread 11 made of copolymer polyester and having a fiber diameter of 1100 dtex, a first monofilament weft thread 12 made of polyester and having a fiber diameter of 1100 dtex, a second multifilament weft thread 13 made of polyester and having a fiber diameter of 1100 dtex, and a multifilament binder thread 14 made of polyester and having a fiber diameter of 1100 dtex, and the warp threads 11 and binder threads 14 are arranged at 166 threads per 10 cm in the width direction of the conveyor belt 1, and the first weft thread 12 and second weft thread 13 are arranged at 111 threads per 10 cm in the width direction of the conveyor belt 1.
  • a conveying belt using canvas formed from filaments of a low-elasticity material as a core according to the comparative example 1, and a conveying belt composed of a single layer of resin according to the comparative example 2 were prepared.
  • the conveying belt according to the comparative example 1 was obtained by laminating a 0.5 mm thick canvas formed from filaments of a low-elasticity material and a 0.3 mm thick resin layer made of polyurethane.
  • the conveying belt according to the comparative example 2 was formed from a single layer of polyurethane resin.
  • the conveyor belts according to the embodiment, comparative example 1, and comparative example 2 obtained as described above were pulled in the longitudinal direction of the belt to determine the relationship between the elongation rate and tension, and the tensile properties were measured.
  • the sample size was set to 20 mm wide x 450 mm long, the pulling speed was set to 50 mm/min, and the chuck distance was set to 400 mm, and measurements were performed.
  • the sample size was set to a dumbbell shape of 10 mm wide x 200 mm long, the pulling speed was set to 50 mm/min in the low elongation range (1-10%), and the sample size was set to a dumbbell shape of No.
  • Figure 4 is a graph showing tension versus elongation rate for the conveyor belt of the first embodiment.
  • Figure 5 is a graph showing tension versus elongation rate, enlarged from the portion of the graph in Figure 4 where elongation rates are 0-5%.
  • the vertical axis shows tension (N/mm) and the horizontal axis shows elongation rate (%).
  • graph a shows the conveyor belt of Comparative Example 1
  • graph b shows the conveyor belt of Comparative Example 2
  • graph c shows conveyor belt 1 of the embodiment.
  • the conveyor belt 1 of the embodiment was able to achieve a tension higher than that of a conveyor belt made of a single layer of resin, particularly in the low elongation region, and lower than that of a conventional conveyor belt that uses canvas formed from filaments of a low elasticity material as a core.
  • the conveyor belt 1 of the embodiment was able to reduce the amount of change in tension relative to the elongation rate in the low elongation region compared to a conventional conveyor belt that uses canvas formed from filaments of a low elasticity material as a core.
  • Fig. 6 is a graph showing tension versus elongation rate for the belt canvas of the second embodiment.
  • Fig. 7 is a graph showing tension versus elongation rate, enlarged from the portion of the graph in Fig. 6 where elongation rates are 0-5%.
  • the vertical axis shows tension (N/mm) and the horizontal axis shows elongation rate (%).
  • graph d shows the canvas formed from filaments of a low-elasticity material used in the conveyor belt of Comparative Example 1
  • graph e shows the belt canvas 10 used in the conveyor belt 1 of the embodiment.
  • the belt canvas 10 used in the conveyor belt 1 of the embodiment was able to achieve a lower tension, especially in the low elongation range, than the canvas made of filaments of a low elasticity material used in the conveyor belt of the comparative example.
  • the belt canvas 10 used in the conveyor belt 1 of the embodiment was able to reduce the amount of change in tension relative to the elongation rate in the low elongation range compared to the canvas made of filaments of a low elasticity material used in the conveyor belt of the comparative example.
  • first weft 12, the second weft 13, and the binder yarn 14 may be either monofilament or multifilament.
  • the first weft 12, the second weft 13, and the binder yarn 14 may be made of the same material or different materials.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Belt Conveyors (AREA)

Abstract

L'invention concerne : une bande de transport pouvant réaliser le transport d'un objet lourd et la réduction d'une charge sur une machine en raison de l'amplitude d'une charge axiale ; et une toile de bande qui peut être utilisée pour la bande de transport. La bande de transport comporte une toile de bande 10, et une couche de résine appliquée sur une surface et/ou l'autre surface de la toile de bande 10. La toile de bande 10 comprend : une pluralité de chaînes droites 11 s'étendant dans la direction de la longueur de la bande de transport et composées de monofilaments constitués d'un matériau élastique ; une pluralité de premières trames 12 et de secondes trames 13 droites s'étendant dans une direction croisant les chaînes 11 d'un côté et de l'autre côté des chaînes 11 de la bande transporteuse et composées d'un matériau ayant une élasticité inférieure à celle des chaînes 11 ; et une pluralité de fils de liaison 14 s'étendant dans la même direction que les chaînes 11 et reliant les chaînes 11, les premières trames 12 et les secondes trames 13.
PCT/JP2024/008435 2023-03-31 2024-03-06 Bande de transport et toile de bande Pending WO2024203055A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023058814A JP2024146098A (ja) 2023-03-31 2023-03-31 搬送用ベルト及びベルト用帆布
JP2023-058814 2023-03-31

Publications (1)

Publication Number Publication Date
WO2024203055A1 true WO2024203055A1 (fr) 2024-10-03

Family

ID=92904329

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/008435 Pending WO2024203055A1 (fr) 2023-03-31 2024-03-06 Bande de transport et toile de bande

Country Status (2)

Country Link
JP (1) JP2024146098A (fr)
WO (1) WO2024203055A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63212641A (ja) * 1987-02-27 1988-09-05 Canon Inc 画像形成装置
JPH02152807A (ja) * 1988-12-02 1990-06-12 Yokohama Rubber Co Ltd:The コンベヤベルト
JP2002068440A (ja) * 2000-08-24 2002-03-08 Nippon Jiikuringu Kk 高強度複合ベルト
JP2005298085A (ja) * 2004-04-07 2005-10-27 Nitta Ind Corp 搬送ベルト
US20060073751A1 (en) * 2003-11-18 2006-04-06 Mol Belting Company Interwoven belt fabric

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63212641A (ja) * 1987-02-27 1988-09-05 Canon Inc 画像形成装置
JPH02152807A (ja) * 1988-12-02 1990-06-12 Yokohama Rubber Co Ltd:The コンベヤベルト
JP2002068440A (ja) * 2000-08-24 2002-03-08 Nippon Jiikuringu Kk 高強度複合ベルト
US20060073751A1 (en) * 2003-11-18 2006-04-06 Mol Belting Company Interwoven belt fabric
JP2005298085A (ja) * 2004-04-07 2005-10-27 Nitta Ind Corp 搬送ベルト

Also Published As

Publication number Publication date
JP2024146098A (ja) 2024-10-15

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