JPH0545061Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to an insulation repair material suitable for repairing the connecting wires of a watt-hour meter. When a watt-hour meter is replaced without interruption, the insulation coating of the connecting wire is destroyed at the connection point, and the present invention relates to an insulation repair material that can easily repair the broken point in such a case.

[Prior Art] Conventionally, insulating tape such as electrically insulating vinyl adhesive tape has been used to repair the insulation coating of insulated wires, and the repair has been carried out by wrapping the tape around the damaged area several times using a device.

[Problems that the invention aims to solve] However, the conventional tape-wrapping method has the problem of very poor workability, as power meters are usually housed in a special box and the work space is very small. Ta. In addition, in the method of cutting the tape into small pieces and pasting them on the damaged area, the tape material was in the form of a sheet, so there was a problem that the tape could peel off due to the restoring force of the sheet. Furthermore, since various wire diameters are mixed in the connecting wires of watt-hour meters, it has been desired to develop a repair material that can be applied to any wire diameter.

Therefore, the purpose of this invention is to provide an insulation repair material that has good workability, does not peel off after repair, and can be applied to any wire diameter.

[Means for Solving the Problems] In order to achieve the above object, the insulation repair material according to this invention consists of a synthetic resin main body as a repair main body and an adhesive material that fixes this main body to the repaired part of the electric wire. The insulation repair material is constructed so that it can be easily fixed and repaired to the repaired area using the adhesive strength of the adhesive material, and there is no peeling after repair, and it can be applied to any wire diameter. Therefore, we have devised the following measures.

That is, the main body made of synthetic resin has a substantially elliptical cross-sectional shape, and has a longitudinal cutout on one surface on the minor axis side.

If such a synthetic resin main body is molded from segments of a synthetic resin extrusion molded tube having a substantially elliptical cross-sectional shape, its inherent restoring force will also work, making it a more desirable insulation repair material.

[Function] The repair material with the above structure does not need to be wrapped like tape, and if it is inserted into the repaired part of the electric wire using the incision and crimped, it will be firmly fixed to the repaired part by the adhesive material. Ru.

Since the cross-sectional shape is approximately elliptical, it can be applied to small-diameter electric wires in the short axis direction, and can be applied to large-diameter electric wires in the inner peripheral length.

Furthermore, since the main body formed into a substantially elliptical shape is expanded at the incision and fixed to the electric wire, it has a tendency to wrap around the electric wire, and there is little risk of it peeling off after being fixed.

Note that when a synthetic resin extrusion molded tube is cut in the length direction (extrusion direction), the stress balance during extrusion molding is disrupted and the tube contracts in the inner diameter direction, which acts as a wrapping force for the electric wire. The state of attachment to the electric wire becomes even better.

[Example] Fig. 1 is a cross-sectional view showing an example of the insulation repair material according to the invention, in which 1 is a synthetic resin main body having a substantially elliptical cross-sectional shape, and 2 is a main body 1. 3 is an adhesive material fixed to the entire inner surface of the main body, and 4 is a release paper for protecting the surface of the adhesive material.

In this example, the synthetic resin main body 1 is made of an extruded polyvinyl chloride tube that is extruded so that the cross-sectional shape is approximately elliptical, and is cut in the length direction on one surface of the short axis of the ellipse.
It is divided into appropriate sizes.

Further, the dimension in the short axis direction is made smaller than the outer diameter of the minimum applicable electric wire, and the inner circumference length is made slightly smaller than the outer circumference of the maximum applicable electric wire.

Butyl rubber is used as the adhesive material,
Various other adhesive materials having insulating properties can also be used.

FIGS. 2A and 2B show an example of application when the electric wire 5 is used for maximum application, and reference numeral 6 indicates a damaged portion of the insulation coating that requires repair.

3A and 3B show an example of application in the case of using the minimum applicable electric wire 7, and reference numeral 8 indicates a damaged part in the insulation coating as a repair required part.

In either case of FIGS. 2 and 3, the contraction force of the synthetic resin main body 1 acts as indicated by the arrow in the drawing, and a good fastening state can be obtained.

[Effects of the invention] As detailed above, the insulation repair material for insulated wires according to this invention has a structure that allows it to be easily fixed to the parts of the wire that require repair, and is not only highly workable, but also effective at fixing the wires. The insulation repair material has good adhesion, does not peel off after repair, and can be applied to both large and small wire diameters, making it the ideal material for repairing electrical wires connected to watt-hour meters. It could have been provided.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing one embodiment of the insulation repair material for insulated wires according to this invention, Fig. 2 A and B show an example of application when used for the maximum applicable electric wire, and A is a cross-sectional view. Figures 3A and 3B are front perspective views, Figures 3A and 3B show an example of application when used for a minimum applicable electric wire, Figure 3A is a cross-sectional view, and Figure 3B is a front perspective view. 1...Synthetic resin main body, 2...Incision part, 3...
Adhesive material, 4...Release paper.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A main body made of synthetic resin that has a substantially elliptical cross-sectional shape and has a longitudinal cutout on one surface of its minor axis, and a part or the entire inner surface of the main body. Insulation repair material for insulated wires, consisting of an adhesive material that is adhered to. (2) The insulation repair material for an insulated wire according to claim 1, wherein the synthetic resin main body is composed of segments of an extruded synthetic resin tube having a substantially elliptical cross-sectional shape.