JPH10126945A - Sable end sheath movement preventive structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the sheath of a cable end from moving at a low cost by a method wherein a ring is fitted on the sheath of the cable end, the end of the sheath is folded on the ring and the folded sheath end part is tightened by a band and, further, fixed by a heat-shrinkable tube. SOLUTION: First, a wedge-like ring 10 is put on the outer circumference of the sheath 5 of a cable 1 end. The outer circumference of the ring 10 is tapered so as to have a wedge-shape. Slits are formed in the end 5A of the sheath 5 and a plurality of the pieces of the sheath end 5A are folded on the ring 10 into wedge-shapes. After the folded pieces of the sheath end parts 5A are bound and tightened by a band 11, a heat-shrinkable tube 12 is put over the whole folded sheath end and the stripped cable end to fix as a whole. As a result, the movement of the cable end sheath can be avoided by simple components and works and the moisture-proofness and electrical insulating properties of the cable end can be improved at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheath movement preventing structure for a power cable terminal.

[0002]

2. Description of the Related Art A typical power cable terminal conventionally used is shown in FIG. In FIG. 2, reference numeral 1 denotes a power cable, which comprises a cable conductor 2, a cable insulator 3, a cable copper tape 4, and a cable copper sheath 5.

The terminal is formed by stripping a cable end to a predetermined size, attaching a terminal 6 to the cable conductor 2, and winding an insulating tape 9 and a shielding tape 8.
7 is a stress cone.

In the prior art of this type of cable terminal, for example, as disclosed in JP-A-59-67815, a cable terminal is supported by a bracket, and the cable terminal is held by a bracket around the outer periphery of a cable sheath. At a position closer to the end than the part, there is a case where the sheath section is wound in contact with the bracket, and an adhesive heat-shrinkable tube is fitted thereon and heat-shrinks to prevent the sheath from being displaced with respect to the bracket. .

[0005] As a structure of a cable terminal portion, for example, Japanese Patent Application Laid-Open No. 56-29410 discloses that a ring is inserted into a terminal of a cable and a cut is made at an end of an external semiconductive layer of the cable. The end of the conductive layer is folded at the ring position, and the folded portion is stopped with a presser winding (a stress cone is formed by the folded portion), and
The entire folded portion is housed in a bushing to be filled with a highly soft insulating mixture, and Japanese Patent Application Laid-Open No. 61-96727 discloses that the sheath end is folded, the portion is filled with an adhesive, and the folded portion is filled. A technique is described in which an adhesive is fixed to a terminal pipe by filling with an adhesive.

[0006]

The sheath of a cable may move depending on the laying environment, load conditions, and the like, and the effect may be manifested as a defect in the cable terminal.

For example, if the sheath moves at the end of the cable, the insulation tape 9 or the shielding tape 8 may be unwound and cracked, and the waterproofing performance may be reduced, and the cracking of the shielding tape may cause insulation breakdown.

According to the present invention, such sheath movement prevention is provided.
The above-mentioned conventional techniques (for example, the technique of engaging the bracket with the sheath section / heat-shrinkable tube, or fixing the folded sheath by bushing or filling the terminal pipe with an insulating admixture or an adhesive) are unnecessary, which is simple and convenient. An object of the present invention is to provide a low-cost cable terminal sheath movement prevention structure which can be reliably realized by parts and operations.

[0009]

According to the structure for preventing movement of a sheath of a cable terminal according to the present invention, a ring is fitted on a sheath of the cable terminal, and an end of the sheath is folded over the sheath to form a sheath folded portion. It is characterized in that it is fastened with a band on the upper side, and the whole folded portion of the sheath is fixed with a heat-shrinkable tube.

According to the above configuration, the sheath end is fastened by the ring and the band, and the heat-shrinkable tube tightens the entire sheath end (folded portion) on the cable end, so that the sheath movement can be prevented.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a sectional view showing an essential part of an embodiment of the present invention, in which the same reference numerals as those in FIG. 2 denote the same parts.

In this embodiment, the cable 5 has a sheath 5 at one end.
A wedge-shaped ring 10 is fitted on the upper side, that is, on the outer periphery of the sheath 5. The outer periphery of the ring 10 has a tapered surface and has a wedge shape. The end portion 5A of the sheath (for example, a copper copper sheath) 5 is slit in the cable axial direction and placed on the wedge-shaped ring 10 in a state of a plurality of pieces (three or more pieces). The stress cone is also formed at the time of the sheath folding by folding back), and the folded end portion 5A is bound on the cable sheath 5 by a band 11 in a tightened state.

The cable sheath 5 has good workability if it is heated and folded at the time of folding.

After the band 11 is attached, the sheath folded portion 5 is covered with a heat-shrinkable tube 12 over the entire sheath folded portion and the end of the cable from which the sheath has been stripped.
A whole is fixed.

According to the present embodiment, by providing the cable terminal with the sheath movement preventing structure, it is possible to ensure waterproofness and to prevent the electric insulation performance from being deteriorated. 10, band 1
1. The sheath movement preventing structure of the cable terminal can be realized only by providing the heat shrinkable tube 12.

[0017]

As described above, according to the present invention, a structure for preventing movement of the sheath of the cable terminal can be realized with simpler parts and operations than in the prior art. Improvement can be achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a power cable terminal according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of a conventional power cable terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable 5 Sheath 5A Sheath folded part 10 Wedge-shaped ring 11 Band 12 Heat-shrinkable tube

Claims (3)

[Claims] A ring is fitted on a sheath of a cable end, an end of the sheath is folded over the sheath, and a folded portion of the sheath is tightened with a band on the sheath. A sheath movement preventing structure for a cable terminal, which is fixed by a tube. 2. The structure according to claim 1, wherein said ring comprises a wedge-shaped ring. 3. The sheath movement prevention of a cable terminal according to claim 2, wherein an end of said sheath is slit and a plurality of pieces are put on said wedge-shaped ring and folded in a wedge shape. Construction.