JPS5930570Y2 - Grounding part of wire shield cable - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a grounding section of a wire shielded cable.

In recent years, so-called wire-shielded cables in which copper wire is wound horizontally around the outside of an external semiconductor layer have been widely used in order to prevent the occurrence of wrinkles in the shielding copper tape.

In such a cable line, when cross-bonding or the like is performed to reduce sheath current, it is necessary to take out a grounding wire from the wire shield, but conventionally there has been no method for grounding the cable.

An object of the present invention is to provide a grounding section for a wire shielded cable that is suitable for grounding the wire shielded cable at a predetermined position.

Hereinafter, the present invention will be explained based on the drawings of one embodiment.

As shown in FIG. 1, the wire shield cable includes a conductor 1, an inner semiconducting layer 2, an insulator 3, an outer semiconducting layer 4, a wire shield 5, a restraining tape 6, and an outer sheath, which are sequentially provided on the conductor 1. It is composed of γ.

However, in order to directly ground such a wire shield cable 8, the cable jacket T is first peeled off and the holding tape 6 is removed.

When the restraining tape 6 is removed, the wire shield 5 swells to some extent due to its own rigidity, and gaps are formed between the wires.

Insert the mounting piece of the grounding fitting, which will be described later, into this gap.

What is shown in FIG. 2 is a grounding fitting 9 that is attached to a cable, and includes a band-shaped mounting piece 10 made of easily deformable metal material such as copper or lead, and a seat body 11 fixed to the surface of the mounting piece 10. and has.

The mounting piece may be split into one half or one half.

This grounding fitting 9 is fixed to the wire shield 5 by bending a mounting piece 10 along the outer periphery of the cable outer semiconductive layer 4 and binding the copper wire 12, or by soldering or the like, as shown in FIG.

It is desirable to attach a cushion layer 13 made of rubber, plastic, or the like to the inner surface of the mounting piece 10 in advance.

In this implementation, the soldering can prevent heat transfer to the cable body at times and can absorb radial heat shrinkage in the cable.

The waterproofing layer 14 consists of a pair of stepped cable jackets γa.
, 7b, by winding a waterproof tape so as to cover the exposed surface of the wire shield 5.

The waterproof layer 14 may be formed using a heat shrink tube.

In this case, the heat shrink tube is bonded to the cable in the following manner.

In other words, fit a heat shrink tube to the tip of the cable in the manhole, let the cable run as it is, heat shrink the tube when it reaches the wire shield area, and wrap both ends of the tube with tape. Waterproof.

In this case, since the seat body 11 of the grounding fitting 9 protrudes, the tube to be attached to the corresponding position may be cut in the circumferential direction or two tubes may be used.

As described above, in the present invention, the grounding fitting can be attached directly to the wire shield portion without cutting the wire shield.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a wire-shielded cable, FIG. 2 is a front view of a grounding fitting used in the present invention, and FIG. 3 is a longitudinal cross-sectional view of the grounding portion of the wire-shielded cable in the present invention. 4...External semiconductive layer, 5...Wire shield, γ...Outer cover, 9...Grounding fitting, 10...Mounting piece , 11... Sitting body, 1
3... Cushion layer, 14... Waterproofing layer.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Rather than metals that are easily deformed, a band-shaped mounting piece and a grounding fitting having a seat on one side are used as a wire shield exposed by peeling off the cable sheath of the required part. A mounting piece of the grounding fitting is inserted between the cable body directly below the wire shield along the outer periphery of the cable body, and the wire shield and the mounting piece of the grounding fitting are electrically connected. A grounding part of a wire shield cable, characterized in that the exposed outer periphery of the wire shield is waterproofed. 2. The grounding portion of a wire shielded cable according to claim 1 of the registered utility model claim, wherein a cushion layer is provided on the cable body side of the mounting piece of the grounding fitting. 3. Grounding of the wire shield cable according to claim 1 or 2 of the utility model registration claim, in which the waterproofing layer is formed by heat shrinking a heat shrink tube inserted from one end of the cable at the exposed wire shield area. Department.