JP2002343143A - Electric shield wire and its braiding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric shield wire and its braiding method, which excels in workability in braiding, can equalize processed quality, and can automate braiding. SOLUTION: It is the electric shield wire 10, with which an insulator 12, braiding 14, and a sheath 15 are arranged surrounding a conductor 11, and its braiding method. The electric shield wire 10 is arranged with two or more spreading components 13, which widely spreads the braiding, between the insulator 12 and the braiding 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded electric wire and a braiding method thereof.

[0002]

2. Description of the Related Art In a conventional shielded electric wire, for example, a shielded electric wire 1 shown in FIG. 7, an insulator 3, a braided metal wire 4 and a sheath 5 are arranged in this order around a conductor 2 composed of a stranded wire. Have been. For example, when the shielded wire 1 is used for wiring of an electric vehicle, the
Since it is necessary to take measures against electromagnetic wave shielding from the viewpoint of MC (electro-magnetic compatibility), the braid 4 in which the sheath 5 at the end is partially removed and exposed is shielded.
In such a case, in the conventional shielded electric wire 1, a cap 7 made of an electrically conductive metal attached in advance is arranged near the boundary between the braid 4 and the sheath 5, and as shown in FIGS. The braid 4 and the cap 7 are electrically connected by folding the braid 4 and covering the cap 7.

[0003]

By the way, the braid 4
Since the metal wire made of tin-plated annealed copper wire or the like is woven, there is a problem that the work of folding back is troublesome and troublesome, and that the wire is broken when folded.
In this case, if the braid 4 is separated, the braid 4 and the cap 7 of the shielded electric wire 1 do not contact uniformly, and the quality of the braid processing becomes uneven. In addition, since the shielded electric wire 1 is subjected to braid processing by folding back the braid 4, it is difficult to automate the processing operation using a machine.

[0004] The present invention has been made in view of the above points, has excellent workability of braid processing, can uniform processing quality,
An object of the present invention is to provide a shielded electric wire capable of automating a braiding process and a braiding method thereof.

[0005]

According to the present invention, there is provided a shielded electric wire in which an insulator, a braid, and a sheath are arranged on the outer periphery of a conductor. The configuration is such that a plurality of expanding members for expanding the braid are arranged. In order to achieve the above object, in the method for braiding a shielded electric wire of the present invention, an insulator, a braid, and a sheath are arranged on an outer periphery of a conductor, and the braid is expanded between the insulator and the braid. The braid at the end of the shielded wire is expanded by the plurality of spreaders, and a conductive member is attached from the end of the shielded wire to the braid. The configuration is such that the conductive member is electrically connected.

Preferably, the expanding member is a wire,
It is assumed that the wire is spirally wound around the insulator.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a shielded electric wire and a braiding method thereof according to the present invention will be described below in detail with reference to FIGS. As shown in FIGS. 1 and 2, the shielded electric wire 10 has an insulator 12, four wires 13, a braid 14, and a sheath 15 arranged in this order on the outer periphery of a conductor 11.

[0008] The conductor 11 is a stranded wire obtained by twisting a plurality of strands. The insulator 12 is made of a synthetic resin such as cross-linked polyethylene. The braid 14 is formed by weaving a thin metal wire such as a tin-plated soft copper wire having a diameter of about 0.2 mm, and four wires 13 are arranged between the braid 14 and the insulator 12. Here, the wire 13 is an expanding member that expands the end of the braid 14, and a fiber bundle such as a string or aramid fiber may be used as long as it has such a function.

The sheath 15 is a coating made of chloroprene rubber, vinyl chloride, polyethylene or the like for protecting the shielded electric wire 10. The shielded electric wire 10 is configured as described above, and is subjected to a braiding process by a braiding method of a shielded electric wire described below. First, a desired length of the sheath 15 is removed from the end of the shielded electric wire 10, the end of the braid 14 is expanded by each wire 13, and the tip of the wire 13 is bent outward.

Next, as shown in FIG. 3, a cap 17 made of phosphor bronze or the like plated with an electrically conductive tin is placed on the cap 17.
It is arranged on the end side of the shielded electric wire 10. Cap 17
Has a cylindrical portion 17a and a large-diameter portion 17b.
The outer periphery of the end portion of FIG.
It is provided in the place. The cap 17 has a cylindrical portion 17a.
To the end of the shielded wire 10. Here, as long as the cap 17 has conductivity, a conductive plastic such as a carbon composite material may be used.

Next, the cylindrical portion 17a is pushed along the insulator 12 while the corresponding wires 13 are in contact with the respective recesses 17c. Then, the braid 14 is uniformly spread with the four wires 13 by the pushed cylindrical portion 17a. When the cap 17 is pushed to the desired position in this manner, the cap 17 is inserted between the insulator 12 and the braid 14, as shown in FIGS.
It is electrically connected to the braid 14.

As described above, in the method of the present invention, the braid 14 can be easily pushed and spread without folding back the braid 14 as in the conventional case, simply by pushing the cap 17 along the insulator 12 from the end of the shielded wire 10. Then, the braid 14 and the cap 17 are electrically connected. In addition, in the method of the present invention, since the cap 17 is simply pushed in along the insulator 12, the braid 14 is not separated, the quality of the braid processing of the shielded electric wire 10 becomes uniform, and the processing operation is performed using a machine. Can also be automated.

Here, the shielded electric wire 10 may have four wires 13 spirally wound around the insulator 12 as shown in FIG. In this case, the cap 17 is pushed in by screwing the cylindrical portion 17a along the insulator 12. The number of the wires 13 is indispensable, but the number is not particularly limited as long as the braid 14 can be spread uniformly, and may be two, three, or four or more.

Further, when the cap 17 has a shape that expands in a tapered or curved shape from the cylindrical portion 17a to the large-diameter portion 17b, the braid 14 can be spread more evenly, and the cap 17 extends along the insulator 12. Operation becomes easy. Although the above embodiment has been described in connection with a shielded electric wire, it goes without saying that the present invention is also applicable to a case of a shielded cable.

[0015]

According to the first to sixth aspects of the present invention, there is provided a shielded electric wire which is excellent in workability of braiding processing, can uniformize processing quality, and can automate braiding processing, and a braiding processing method thereof. be able to.

[Brief description of the drawings]

FIG. 1 is a front view of a shielded electric wire showing an embodiment of a shielded electric wire and a braiding method of the present invention.

FIG. 2 is a left side view of the shielded electric wire of FIG.

FIG. 3 is a perspective view showing a state where a conductive member is attached to the shielded electric wire of FIG. 1;

FIG. 4 is a perspective view showing a state where a conductive member is attached to the shielded electric wire of FIG. 1;

FIG. 5 is a front view showing a state in which a conductive member is attached to the shielded electric wire of FIG. 1 with a cross section of the braid and the conductive member.

FIG. 6 is a front view showing another embodiment of the shielded electric wire of the present invention.

FIG. 7 is a front view of a conventional shielded electric wire.

FIG. 8 is a perspective view showing a state where a conductive member is attached to a conventional shielded electric wire.

FIG. 9 is a front view showing a state in which a conductive member is attached to a conventional shielded wire, in which the braid and the conductive member are shown in cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shield electric wire 11 Conductor 12 Insulator 13 Wire (expanding member) 14 Braid 15 Sheath 17 Cap (conductive member) 17a Cylindrical part 17b Large diameter part 17c Concave part

Claims (6)

[Claims] 1. A shielded electric wire in which an insulator, a braid and a sheath are arranged on the outer periphery of a conductor, wherein a plurality of expanding members for expanding the braid are arranged between the insulator and the braid. And shielded wires. 2. The expansion member according to claim 1, wherein the expansion member is a wire.
Shielded wires. 3. The shielded electric wire according to claim 2, wherein said wire is spirally wound around said insulator. 4. The shielded electric wire, wherein an insulator, a braid, and a sheath are arranged on an outer periphery of the conductor, and a plurality of expanding members for expanding the braid are arranged between the insulator and the braid. The braid at the end of the shielded wire is expanded by a plurality of expanding members, and a conductive member is attached from the end of the shielded wire to electrically connect the braid and the conductive member. Braid processing method of shielded electric wire. 5. The expansion member according to claim 4, wherein the expansion member is a wire.
Braid processing method of shielded electric wire. 6. The method according to claim 5, wherein the wire is spirally wound around the insulator.