JPH10177867A - Lead wires for power distribution equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To ensure that a gap created between a wire conductor insertion hole of a copper terminal and a wire conductor and a wire conductor is filled with a filling material for a long period of time so that no water pools are formed. Provide lead wires for power distribution equipment. SOLUTION: A copper terminal 3 used for a lead wire with a rubber mold cone is filled with a hardening resin or a molten solder 8 which is a material that is fluid and solidifies, and a wire conductor 2 is inserted into a hole for connecting a wire conductor of a copper terminal 3. The lead wire for power distribution equipment is characterized in that the copper terminal 3 is compression-connected after the hardening resin or the molten solder 8 is solidified. Further, it is a lead wire for power distribution equipment configured by compressing and connecting the wire conductor 2 to the copper terminal 3 and then covering the rubber mold cone 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead wire for power distribution equipment.

[0002]

2. Description of the Related Art The prior art will be described with reference to the drawings. In FIG. 2 which is a cross-sectional view showing the configuration of the lead wire for power distribution equipment, elastic portions 4 are filled in the inner portion of the copper terminal 3 provided with the wire conductor insertion hole for inserting the wire conductor. After that, the electric wire conductor 2 at the end of the power cable 1 is exposed and inserted, and the connecting portion outer surface 31 of the copper terminal 3 is compressed and connected with a die. The lead wire for power distribution equipment is formed by covering the rubber mold cone 5. (June 58-526
No. 20)

[0003] In the lead wire for power distribution equipment having the above configuration,
The purpose of filling the rubber 4 into the hole inside the wire conductor insertion hole of the copper terminal 3 is to allow water to enter into the gap formed between the tip of the wire conductor 2 and the hole inside the copper terminal 3 and reduce the temperature in cold regions. Therefore, the wire conductor 2 is extruded or the copper terminal 3 expands due to volume expansion due to freezing. However, when this is repeatedly received, the gap gradually increases, and the wire conductor 2 comes out of the copper terminal 3 or the copper terminal 3 In order to prevent breakage, the rubber is buried in the void at the back of the hole to prevent accumulation of water.

[0004]

In order to achieve the above object, it is necessary that the rubber 4 and the electric wire conductor 2 are firmly pressed against the copper terminal 3 to compress the connection portion outer surface 31 of the copper terminal 3 at the connection portion. However, since the electric wire conductor 2 is configured by twisting a number of strands, it is necessary to press and hold the electric wire conductor 2 to compress and connect the dies when the dies are compressed. Therefore, there was a problem in work efficiency. In addition, it is difficult to confirm the completion of the compression of the outer surface 31 of the connection portion of the copper terminal 3, and there is a problem in work management. If the wire conductor 2 is compressed with incomplete pressing, as shown in FIG.
A void 61 is formed at the tip of the rubber, resulting in a pool of water, and the purpose cannot be completely achieved even if elastic rubber is present.

Although the wire conductor 2 is cut at a right angle to the axial direction and connected in a straight line, the wires of the wire conductor 2 are displaced due to handling after cutting. As a result, a gap such as the gap 62 may be formed as shown in FIG. Further, it is also known to fill a small gap with a grease-like filler having fluidity, but since the filler has fluidity, the filler is filled between conductor strands for long-term use. There is a risk that the object will move and affect long-term stability. (See Japanese Utility Model Publication No. 52-47740)

The present invention has been made in view of such a point, and ensures that a gap between a wire conductor insertion hole and a wire conductor insertion hole of a copper terminal is filled with a filler for a long time. It is an object of the present invention to provide a lead wire for power distribution equipment in which puddles are not generated. Further, the copper terminal and the electric wire conductor are designed to maintain electrical and mechanical characteristics by compression connection.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a hardening resin or a molten solder, which is a fluid and solidified material, is filled in the back of a conductor connecting hole of a copper terminal used for a lead wire with a rubber mold cone. A lead wire for power distribution equipment, wherein a copper terminal is compression-connected after a wire conductor is inserted and a hardening resin or molten solder is solidified. Further, it is a lead wire for power distribution equipment configured by compressing and connecting an electric wire conductor to a copper terminal and then coating a rubber mold cone.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a configuration of a lead wire for power distribution equipment. That is, the wire conductor 2 at the end of the power cable 1 is exposed and inserted into the wire conductor insertion hole provided in the copper terminal 3. At this time, the hole of the copper terminal 3 is first filled with a material that is fluid and solidifies, for example, a curable resin or a heat-melted solder 8. Thereafter, the electric wire conductor 2 of the power cable 1 is inserted. Therefore, the gap 71 formed inside the hole of the copper terminal 3 and the gap 72 between the strands of the electric wire conductor 2 can be completely filled with the cured resin or the heated and melted solder 8.

After the filler 8 is solidified, the outer peripheral portion 31 of the connecting portion of the copper terminal 3 is compressed by a die and connected. When the solder is filled here, the conductor connection is conventionally performed by the soldering method, but the work of heating the copper terminal 3 as in the above-described method is not required, and the soldering is somewhat poor. Even if the gap 72 between the strands of the electric wire conductor 2 is filled, the object can be achieved. Therefore, in order to obtain electrical and mechanical characteristics, the connecting portion outer peripheral portion 31 of the copper terminal 3 is compression-connected by a die. It is.

When the wire conductor 2 is inserted, the space 71 at the tip of the wire conductor 2 and the wire conductor 2
Even in the gap 72 due to the irregularity of the cut wires, the solidification can be performed in a state where all the gaps are filled.
Then, the connecting portion of the copper terminal 3 is compressed and connected with a die, so that there is no water pool even if water infiltrates.
It is possible to surely eliminate defects such as destruction of the object. After that, similarly to the conventional example shown in FIG. 2, a connection portion between the copper terminal 3 and the electric wire conductor 2 is coated with a rubber mold cone to form a lead wire for power distribution equipment.

[0011]

As described above, according to the lead wire for power distribution equipment of the present invention, the following work management, which is problematic when a copper terminal is compression-connected to an electric wire conductor, is not required. There is no need to press the wire conductor firmly during compression. Even if a gap is generated due to the displacement between the strands of the cut end of the wire conductor, the gap can be filled. There is no need to check for voids and gaps after compression. Then, after the wire conductor is inserted into the hole of the copper terminal, the compression connection is performed in a state where no gap or gap is generated, so that there is no water pool, so that a problem due to repeated freezing in a cold region does not occur.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a lead wire for power distribution equipment according to an embodiment;

FIG. 2 is a cross-sectional view showing a configuration of a conventional lead wire for power distribution equipment;

FIG. 3 is an enlarged sectional view showing a connection portion between the copper terminal and the electric wire conductor of FIG. 2;

FIG. 4 is an enlarged sectional view showing only a distal end portion of the electric wire conductor of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power cable 2 Electric wire conductor 3 Copper terminal 31 Compression part 4 Elastic rubber 5 Rubber mold cone 61,62 Air gap 71 Air gap 72 Air gap 8 Filling material

Claims (2)

[Claims] 1. A hardening resin or a molten solder, which is a material that has fluidity and solidifies, is filled in a deep portion of an electric wire conductor connecting hole of a copper terminal used for a lead wire with a rubber mold cone.
A lead wire for power distribution equipment, wherein a copper terminal is compression-connected after a wire conductor is inserted and a hardening resin or molten solder is solidified. 2. After compression-connecting an electric wire conductor to the copper terminal,
The lead wire for a power distribution device according to claim 1, wherein the lead wire is formed by covering a rubber mold cone.