JP2534682Y2 - Compact stress cone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a phase identification display means provided on a compact stress cone used in a cable terminal connection portion.

[Conventional technology]

Conventionally, as shown in FIG. 3, a cable end connecting portion for connecting to an electric device or the like has a conductive rubber layer 21 for relaxing an electric field at an end portion of a cable outer shielding layer, and an insulating member for reducing a tape winding portion as much as possible. A compact stress cone 20 composed of a rubber molding layer 22 is frequently used. In the case where a phase identification display is provided for each phase of the terminal connection portion, conventionally, an adhesive vinyl tape is wound on the outer peripheral surface of the central portion of the stress cone 20 as shown in the figure, and the phase identification display 23 is provided.

Note that the sign displayed on the stress cone is not the phase identification sign of the cable end connection part, but like the rubber mold type stress cone of Japanese Utility Model Laid-Open No. 2-72638, the outer diameter is the same and the inner cable insulation is not used. In order to prevent a size error when assembling the various rubber mold type stress cones having different diameters of the wire core insertion center hole, a mark is provided on the center hole of the end surface of the conductive terminal portion or the peripheral surface of the conductive terminal portion, There is known a rubber mold type stress cone manufacturing / management identification display means which cuts off the size after checking the size when using the stress cone.

In addition, a mark for wire identification is provided on a wire terminal in which a ferrule including a conductor tubular portion fitted to a conductive core wire of a wire and a tubular insulating skirt fitted to an insulating coating portion is fitted to a wire terminal portion. For this purpose, a supporting member is attached to a window hole on the peripheral surface of the cylindrical insulating skirt portion, and a plurality of plastic rings with identification symbols are fitted on the peripheral surface of the supporting member, and unnecessary ring portions are cut off during use. A ferrule for electric wire disclosed in Japanese Patent Publication No. 56-136475 is known.

[Problems to be solved by the invention]

In the conventional phase identification display means as shown in FIG. 3, the operation of winding the adhesive vinyl tape around the outer peripheral surface of the stress cone 20 to provide the phase identification display 23 is troublesome and takes a long time. In addition, the adhesive vinyl tape peeled off during use, and the phase of the adhesive vinyl tape could not be identified due to the discoloration of the adhesive vinyl tape, so that maintenance and inspection work became extremely difficult.

In addition, the identification and display means for manufacturing and managing the rubber mold-type stress cone of the utility model application publication is to cut off after checking the size when using the stress cone,
Since the place where the sign is provided is the end of the conductive terminal part of the stress cone, it is provided on the stress cone used at the cable terminal connection part, and as a sign to indicate the phase identification so that it can be always visually observed from the outside in use condition Cannot be applied.

The sign of the electric wire ferrule disclosed in the patent application is a sign attached to the electric wire terminal, and has a configuration in which a sign ring is cutably fitted on the peripheral surface of the supporting member attached to the ferrule, so that the stress cone is Not applicable as a sign.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a compact stress cone for a cable terminal connection in which phase identification is possible semipermanently.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention provides a compact stress cone comprising a conductive rubber layer and an insulating rubber molding layer used for a cable terminal connection portion, wherein a holder is provided on an outer peripheral surface of a central portion of the stress cone. The compact stress cone is constructed by standing upright and fitting an identification plate into the holder.

[Action]

The above-mentioned stress cone is mainly used for a cable termination connection part as a thing of 33 KV or less, a conductive rubber layer relieves an electric field at an end of a cable outer shielding layer at a cable termination connection part, and an insulating rubber molding layer is used. This is to save the tape winding part as much as possible.

An identification plate that is color-coded for each phase is fitted in a holder that stands on the outer peripheral surface of the central portion of the stress cone, and identification for each phase is performed by the identification plate.

The discrimination plate is exposed on the surface of the cable for each phase at the cable terminal connection portion, and is always visible from the outside.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a half-sectional view taken along a center line in the longitudinal direction. In FIG. The conductive rubber layer 3 for relaxing the electric field at the end is an insulating rubber molded layer for minimizing the power consumption of the tape winding part.

Reference numeral 4 denotes a cylindrical holder that stands upright on the outer peripheral surface of the central portion of the stress cone 1. An annular protrusion 4a is provided on the inner peripheral surface of the distal end of the cylindrical holder 4.

Reference numeral 5 denotes an identification plate made of a colored plastic plate or the like fitted in the holder 4, and the identification plate 5 performs identification display for each phase.

The shape of the holder 4 is not limited to a cylindrical shape, but may be changed in design as appropriate according to the intended use, such as an elliptical shape or a square shape.

By fitting the identification plate 5 made of a colored plastic plate or the like into the holder 4 standing upright on the outer peripheral surface of the central part of the stress cone 1 as described above, it is difficult to wind the identification adhesive vinyl tape which is troublesome and takes a long time. A conventional stress cone that can semipermanently identify a phase can be obtained by eliminating conventional disadvantages such as work, peeling off of an adhesive vinyl tape, inability to determine phase identification due to discoloration, and the like.

[Effect of the invention]

In the present invention, as described above, the identification plate is fitted in the holder that is provided upright on the outer peripheral surface of the central portion of the compact stress cone used for the cable terminal connection portion, so that it can be always visually observed from the outside in use. Thus, it is possible to provide a compact stress cone for a cable termination connection in which the phase can be identified semipermanently.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
FIG. 3 is a half sectional view taken along a longitudinal center line of the conventional compact stress cone, and FIG. 3 is a half sectional view taken along a longitudinal center line thereof. 1: stress cone 2: conductive rubber layer 3: insulating rubber molding layer 4: holder 5: identification plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A compact stress cone comprising a conductive rubber layer and an insulating rubber molding layer used in a cable terminal connection portion, wherein a holder is erected on an outer peripheral surface of a central portion of the stress cone, and an identification plate is provided in the holder. A compact stress cone that is fitted with.