JP2001291435A - Electromagnetic wave shielding braided sleeve with earth cable and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic wave shielding braided sleeve with an earth cable and its manufacturing method, allowing a terminal to be mounted on the earth cable assembled into the braided sleeve, when used, the earth cable to be easily headed and drawn out of the braided sleeve during mounting the earth terminal thereon and the earth cable braided into the braided sleeve itself to be handled as a similar way as in the case that no earth cable exists. SOLUTION: The braided sleeve (S) having electromagnetic wave shielding performance, in which a preset number of element wires (s) are spirally braided, comprises the earth cable (A) braided in parallel or at a more gentle angle than the spiral angle of the element wires (s) in the longitudinal direction of the braided sleeve (S), independently of the braided structure of the braided sleeve (S).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding braided sleeve with a ground wire for effectively shielding electromagnetic waves generated from electric wires connected to electronic equipment, machine tools, or the like, or entering those electric wires. Things. The present invention also relates to a method for industrially advantageously producing such an electromagnetic wave shielding braided sleeve with a ground wire.

[0002]

2. Description of the Related Art An electromagnetic wave shielding braided sleeve for covering an electric wire has been used to effectively shield electromagnetic waves generated from or penetrating into electric wires connected to electronic devices, machine tools, and the like. . Since this braided tube expands and contracts in the radial direction, there is an advantage that it can cope with different wiring diameters or different wiring numbers.

[0003] For example, the following documents describe the electromagnetic wave shielding braided sleeve.・ "Noise suppression shield materials and methods, February 2, 1989"
Published the first edition on August 8
The section “J. Shield Sleeve” on page has a compact description of the electromagnetic shielding braided sleeve.・ Japanese Utility Model Laid-Open No. 1-86297 (Japanese Utility Model 6-11599)
Discloses a flexible braided sleeve for electromagnetic wave shielding which is braided into a sleeve shape using a yarn in which a metal foil is spirally wound around the surface of the yarn. In Japanese Utility Model Application Laid-Open No. 59-125019, there is a reference to a shield body made of a braided body formed using a conductive wire body in which a copper foil tape is spirally wound around the outer periphery of an insulating wire. Japanese Utility Model Application Laid-Open No. 61-120118 discloses that a yarn formed by winding a crimped yarn of a synthetic fiber plated with a metal around the periphery of a monofilament yarn of a synthetic fiber is braided in a tubular shape. An electric wire covering material for electromagnetic wave shielding is shown.
In the description of the prior art, there is also a description that a metal wire braided in a tubular shape is put on an electric wire.

[0004] Although the above-mentioned document does not mention a method of manufacturing the electromagnetic wave shielding braided sleeve,
The braided sleeve is manufactured by spirally braiding the strands using a braiding device called a braider.

In order to ensure that the electromagnetic wave shielding braided sleeve exerts the electromagnetic wave shielding function, it is necessary to ground the braided strand of the electromagnetic wave shielding braided sleeve itself. Conventionally, this grounding has been performed by the following method.

(A) A method of unbraiding the end of the electromagnetic wave shielding braided sleeve, soldering or crimping a conductive wire with a ground terminal, and connecting the ground terminal to the ground terminal block. (B) A method in which the braid at the end of the electromagnetic wave shielding braided sleeve is unwound, the strands are bundled, and directly connected to the ground terminal block. (C) One of the braided strands of the electromagnetic wave shielding braided sleeve is replaced with a ground wire, the ground wire is braided as an electromagnetic wave shielding braided sleeve, and at the time of grounding, the ground wire is selected from the end of the braided sleeve. A method of soldering or crimping a conductive wire with a ground terminal and connecting the ground terminal to the ground terminal block. (D) For grounding the braided fabric in (c) above, select a ground wire from the end of the braided sleeve.
Direct connection to the ground terminal block. (E) A method in which an earth wire independent of the electromagnetic wave shielding braided sleeve is bound to the braided sleeve to obtain conduction with the braided sleeve.

[0007]

However, in the above methods (a) and (b), the work of unraveling the braided structure at the end of the electromagnetic wave shielding braided sleeve is extremely troublesome, and therefore, the cable installation work on site is performed. Is significantly impaired.

In the above methods (c) and (d), since the ground wire forms a part of the braided structure, it is not easy to select the ground wire, and it takes a considerable time to select the ground wire. In addition, the efficiency of on-site cable installation work is significantly impaired.

In the above method (e), since an earth wire independent of the electromagnetic wave shielding braided sleeve must be prepared, extra work is required, and the continuity due to binding is a problem in terms of reliability. is there.

[0010] Under such a background, the present invention makes it easy to attach the terminal to the ground wire incorporated in the sleeve when using the braided sleeve, and in that case, the braided ground wire for attaching the ground terminal is used. An electromagnetic wave shielding braided sleeve with an earth wire, which can be easily pulled out from the sleeve and pulled out, and since the ground wire is woven into the braided sleeve itself, can be handled in the same manner as when there is no ground wire. An object of the present invention is to provide a method for producing the same.

[0011]

The electromagnetic wave shielding braided sleeve with an earth wire of the present invention is a braided sleeve (S) having a predetermined number of strands (s) spirally braided and having electromagnetic wave shielding properties. Therefore, independently of the braiding structure of the braided sleeve (S) and in the length direction of the braided sleeve (S),
It is characterized in that the ground wire (A) has a structure woven in parallel or at an angle smaller than the helix angle of the strand (s).

According to the method of manufacturing the electromagnetic wave shielding braided sleeve with the ground wire of the present invention, a predetermined number of strands are formed by using a braider.
In order to obtain a braided sleeve (S) having electromagnetic shielding properties by spirally braiding (s), a plurality of strand carrier bobbins (3) are braided on the guide (2) of the upper plate (1). The wire (s) is spirally braided by moving, and the ground wire outlet fixed to the upper panel (1)
By taking out the ground wire (A) from (5), or by moving the ground wire carrier bobbin (4), which moves with the braiding movement of the wire carrier bobbin (3), on the guide (2), While the strand (s) forms a braided structure, it is independent of the braided structure and its braided sleeve
Connect the ground wire (A) in parallel with the length of (S)
The knitting is performed at an angle smaller than the spiral angle of (s).

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

<Electromagnetic Wave Shielding Braided Sleeve with Ground Wire> The electromagnetic wave shielding braided sleeve with ground wire according to the present invention is basically an electromagnetic wave shielding braid formed of a predetermined number of strands (s) helically braided. It is composed of a braided sleeve (S) having the property.

The braided sleeve (S) has a predetermined number of strands (s).
Are spirally braided, and are manufactured using a braiding device called a blader as described later.

As the strand (s), a metal filament can be used. However, in order to obtain flexibility, usually a synthetic fiber such as a polyester monofilament yarn, a polyamide monofilament yarn, and a high-strength polyethylene monofilament yarn is used. A narrow conductive metal foil made of copper foil or metal-plated copper foil (tin-plated copper foil, nickel-plated copper foil, etc.) wound spirally around a core yarn made of fiber yarn
A book or a plurality of books are preferably used. When a narrow metal foil is spirally wound around the core yarn, it is preferable to provide an appropriate gap so that the metal foils do not overlap with each other in terms of flexibility or flexibility.

The electromagnetic wave shielding braided sleeve with the ground wire of the present invention is independent of the braided structure of the braided sleeve (S) and in the longitudinal direction of the braided sleeve (S).
It has a structure in which the ground wire (A) is woven in parallel or at an angle smaller than the helix angle of the strand (s). This is a characteristic point of the present invention. The method of weaving the ground wire (A) will be described later.

Here, as the ground wire (A), for example,
Conductive metal filaments such as annealed copper wire or a single wire, stranded wire, braided wire, or flat braided wire of metal foil plating yarn are used. The ground wire (A) may be composed of a single wire, but in order to ensure easy handling and reliability of conduction, and to ensure connection to the terminal block, about 2 to 20 or less As described above (preferably, about 3 to 15), it is usual to use a plurality of pieces in a line or twisted.

It is sufficient that one set of the ground wire (A) is provided for the braided sleeve (S), but a plurality of sets may be provided.
In addition, the ground wire (A) may be provided on the entire length of the braided sleeve (S), and is provided intermittently on the braided sleeve (S), and is located at the end of the sleeve when the braided sleeve (S) is cut. You may do so.

<Method of Manufacturing Braided Sleeve with Electromagnetic Wave Shielding Property with Earth Wire> The above-described braided sleeve (S) is manufactured by spirally braiding a predetermined number of strands (s) using a braider.

At this time, a plurality of wire carrier bobbins
The wire (s) is spirally braided by braiding (3) on the guide (2) of the upper plate (1).

The electromagnetic wave shielding braided sleeve with an earth wire according to the present invention, when the element wire (s) is spirally braided as described above, the ground wire (A) is knitted in the following manner. It is manufactured by going out.

The first method is to take out the ground wire (A) from the ground wire outlet (5) fixed to the upper panel (1). At this time, the wire (s) is the wire carrier bobbin
Since (3) braids on the guide (2) of the upper plate (1), it is helically braided, but the ground wire (A) is
The braiding is performed independently of the braiding structure of the strand (s) and parallel to the length direction of the braided sleeve (S) to be formed.

The second method is that the earth wire carrier bobbin moves with a delay from the braiding motion of the wire carrier bobbin (3).
(4) is to move on the guide (2). According to this method, the wire (s) is spirally braided, whereas the ground wire (A) is formed independently of the braided structure of the wire (s). In the length direction of the braided sleeve (S), braid at an angle smaller than the helix angle of the strand (s) (for example, at an angle less than about 1/2 of the helix angle of the strand (s)). I will go.

<Effect> The electromagnetic wave shielding braided sleeve with a ground wire of the present invention is often used by cutting it into a suitable length and covering it with an electric wire or a bundle of electric wires. Examples of electric wires or electric wire bundles include bare wires such as single wires, concentric stranded wires, composite stranded wires, flat stranded wires, braided wires, and copper core aluminum wires; silk wound wires, cotton wound wires, enamelled wires, vinyl wires, cords, etc. Insulated wires; and the like.

In this case, the braided sleeve (S) itself, in which the strand (s) is spirally braided, expands when slightly compressed in its axial direction, and returns to its normal diameter when compression is stopped. Therefore, the electric wire or the electric wire bundle can be covered exactly.

When the braided sleeve (S) is slightly compressed in its axial direction and widened, the ground wire (A) is independent of the braided structure of the braided sleeve (S) and its braid. Parallel to the length of the sleeve (S) or parallel (s)
Since the wire is woven at an angle smaller than the spiral angle of the wire, the ground wire (A) maintains its original shape even by the above-mentioned compression, and can be easily located and pulled out. Therefore,
It is easy to attach the ground terminal to the ground wire (A) even on site.

In addition, the ground wire (A) is a braided sleeve (S)
Since it is integrated with the conventional braided sleeve, it can be used in exactly the same manner as the conventional braided sleeve regardless of the electromagnetic wave shielding braided sleeve with the ground wire.

[0029]

The present invention will be further described with reference to the following examples.

Embodiment 1 FIG. 1 is a front view showing an example of an electromagnetic wave shielding braided sleeve with a ground wire according to the present invention. FIG. 2 is a perspective view showing an example of an apparatus for manufacturing an electromagnetic wave shielding braided sleeve with a ground wire. FIG. 3 is an enlarged view showing an example of the spindle (6) portion of the apparatus shown in FIG. FIG. 4 is an explanatory view showing an example of the upper panel (1) of the apparatus shown in FIG.

The strand (s) was braided using the apparatus (blader) and the spindle (6) shown in FIGS. Two types of the blader were used, each having a specification of 24 and 64 spindle machines.
However, FIG. 2 shows a case where the number of spindles is small to avoid complexity.

As the strand (s), a core made of 40-count, double-stranded aramid fiber, and a width of 0.1 mm made of tin-plated copper foil were used.
Three spirally wound conductive metal foils having a width of 33 mm were used in parallel.

12 or 32 guides on the upper panel (1)
One of (2) has a fixed ground wire outlet (5)
, From which the ground wire (A) is taken out.
Thus, while the wire (s) forms a braided structure, the ground wire (A) is independent of the braided structure and parallel to the length direction of the braided sleeve (S) being formed. ) Was woven.

The electromagnetic wave shielding braided sleeve with the ground wire thus obtained was cut into a predetermined length (for example, 200 mm), slightly compressed by hand in the axial direction thereof, expanded, and passed through a wire bundle. When I let go of my hand, the sleeve tried to return to its normal diameter, so that the wire bundle could be covered tightly. In this state, the ground wire (A), which retains its original shape even when the sleeve is expanded, has been caught, so that it can be easily pulled out. The installation of the ground terminal was easy.

Embodiment 2 FIG. 5 is a front view showing another example of an electromagnetic wave shielding braided sleeve with a ground wire according to the present invention. FIG. 6 is an explanatory view showing an example of the movement of the bobbins (3) and (4) on the upper panel (1) of the apparatus shown in FIG.

In this embodiment, as shown in FIG. 6, an earth wire carrier bobbin (4), which moves with a delay in the braiding movement of the wire carrier bobbin (3), is moved on a guide (2). It is.

Therefore, while the wire (s) forms a braided structure, the wire (s) is formed independently of the braided structure and in the length direction of the braided sleeve (S) to be formed. The ground wire (A) is braided at an angle that is approximately 1/2 less than the spiral angle of ()).

At this time, since the ground wire (A) keeps its original shape even by the expansion of the sleeve, the ground wire (A)
(A) can be easily located and pulled out.

[0039]

According to the present invention, the ground wire (A) is parallel to the length of the braided sleeve (S) independently of the braided structure of the braided sleeve (S) by the strand (s). Or it has a structure woven at an angle smaller than the helix angle of the strand (s). Therefore, according to the present invention, the following excellent effects can be obtained.

1. When the element wire (s) is helically braided to form the braided sleeve (S), the ground wire (A) can be attached together, which facilitates production and is useful as an industrial method. is there.

2. In use, the ground wire (A) to which the ground terminal is attached can be easily pulled out from the braided sleeve (S). In other words, there is no need to unravel the braided structure at the end of the braided sleeve (S), and simply by applying a force in the direction of shortening the braided sleeve (S), the braided sleeve (S) is expanded. However, since the ground wire (A) remains unchanged, the ground wire (A) can be caught with one touch and the ground wire (A) can be easily pulled out.

3. The braided sleeve (S) has excellent shielding properties against electromagnetic waves and is very effective in preventing crosstalk between wires and measures against radiation noise from cables. There are features such as richness, elasticity, and freedom to expand in the radial direction.

4. Since the ground wire (A) is woven into the braided sleeve (S) itself, the same handling as without the ground wire (A) can be performed.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an electromagnetic wave shielding braided sleeve with a ground wire according to the present invention.

FIG. 2 is a perspective view showing an example of an apparatus for manufacturing an electromagnetic wave shielding braided sleeve with a ground wire.

FIG. 3 is an enlarged view showing an example of a part of a spindle (6) in the apparatus of FIG. 2;

FIG. 4 is an explanatory view showing an example of a portion of an upper panel (1) in the apparatus of FIG. 2;

FIG. 5 is a front view showing another example of the electromagnetic wave shielding braided sleeve with a ground wire of the present invention.

FIG. 6 is an explanatory diagram showing an example of the movement of bobbins (3) and (4) on the upper panel (1) of the apparatus shown in FIG. 1;

[Explanation of symbols]

 (S) ... braided sleeve, (s) ... strand, (A) ... ground wire, (1) ... upper panel, (2) ... guide, (3) ... strand carrier bobbin, (4) ... earth wire carrier Bobbin, (5)… Ground wire outlet, (6)… Spindle

Claims (2)

[Claims] A braided sleeve (S) having a predetermined number of strands (s) spirally braided and having electromagnetic shielding properties, independent of the braided structure of the braided sleeve (S). And an electromagnetic wave with a ground wire, characterized in that the ground wire (A) has a structure in which the ground wire (A) is woven in parallel to the length direction of the braided sleeve (S) or at an angle smaller than the spiral angle of the strand (s). Shielding braided sleeve. In order to obtain a braided sleeve (S) having an electromagnetic wave shielding property by spirally braiding a predetermined number of strands (s) using a blader, a plurality of strand carrier bobbins (3) are used. Guide (2) for upper stage (1)
The wire (s) is spirally braided by braiding the upper part, and the ground wire (5) is fixed to the upper panel (1) through the ground wire outlet (5).
Remove (A) or wire carrier bobbin (3)
By moving an earth wire carrier bobbin (4), which moves with a delay to the braiding movement of the wire (4), on the guide (2), the wire (s) forms a braided structure, whereas the braided structure is An electromagnetic wave with a ground wire, characterized in that the ground wire (A) is braided independently and in the length direction of the braided sleeve (S) in parallel or at an angle smaller than the helix angle of the strand (s). Manufacturing method of shielding braided sleeve.