JPS6011718Y2 - Cable connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to cable connections, particularly molded connections for relatively rigid electrical wires.

When performing prefabricated branching of cables, peel off the cable coating layer at the connection part, peel off the insulation layer of the exposed core wire,
After connecting and soldering the other core wires, the wire is placed in a predetermined position in the mold, and the wire is applied to a vinyl mold machine, and a vinyl mold material is injected into the mold from the vinyl mold injection port.

However, because the vinyl mold injection port is oriented perpendicular to the cable axis direction due to injection pressure, the wires placed inside the mold move against the vinyl injection force and are deflected by the vinyl at the connection part. may occur.

This vinyl deflection at the connection part poses a problem in terms of the mechanical strength of the connection part and, ultimately, the deterioration of the insulation properties. The efficiency of molding work was not good because it required adjustment of operating conditions.

This invention was made to eliminate these drawbacks and provide a cable connection with less deflection of the cable sheathing layer. A connecting part in which multiple exposed wire cores are connected at least in one place, a reinforcing material that is attached between the exposed multiple wire cores and is long in the core direction, the ends of these cables, and cores that are collectively coated. and a molded insulator covering the reinforcing material.

Hereinafter, a method for creating a connecting portion according to this invention will be explained.

Figure 1 shows the situation during molding work for a prefabricated branch, where the covering layer of cable 1 is peeled off and part of the exposed part of core 2 is covered with the exposed wire of another cable 3 where the top layer is peeled off. After connecting the core 4 and inserting the insulating tube 5, it is placed in a mold 6, and at this time, a hard plastic or the like is placed in the space where the cores 2 and 4 are located so as to reinforce these cores. A rod-shaped reinforcing material 7 made of

By injecting vinyl molding material from the vinyl injection port 8 into the molding die 6 arranged in this way, the ends of the cables 1 and 3, the wire cores 2 and 4, and the reinforcing material 7 are collectively molded with the vinyl molding material. A cable connection is formed.

In this way, when the S center reinforcing material 7 is inserted into the cores 2 and 4, the rigidity of the cores can be increased even when the cores 2 and 4 have relatively little rigidity. In some cases, it is possible to obtain a connection part that does not move easily and has less uneven thickness.

The reinforcing materials used here include not only rod-shaped bodies C as shown in FIG.
It is also possible to use profiles with the same symmetry, which in this case provides greater stiffness than rods and helps prevent core movement during vinyl injection, as shown in Figure 2a. The reinforcing members in the shapes of and b can also be used for connecting parts of electric wires which are heated by arranging the connecting parts of the electric wires in different spaces formed by these shapes and covering them with heat-shrinkable tubes, for example.

In the example of the reinforcing material mentioned above, the reinforcing material was used to increase the rigidity of the wire core, which has low rigidity. , for example, the same effect can be obtained by arranging them as shown in FIGS. 3a and 3b.

In the figure, 9 is a wire core, and 10 is a reinforcing material.

In addition, when the reinforcing material is placed so as to cover the outer periphery of the wire core as shown in FIG. 3, the reinforcing material is provided with holes 11 in order to facilitate the inflow of powder particles.

As described above, the cable joint of the present invention can resist the injection pressure during vinyl injection molding and thus prevent deflection by adding a reinforcing material even to a non-rigid electric wire.

This eliminates the need for unnecessary mold thickness in consideration of deflection, which is economically advantageous, and also reduces the cooling and hardening time due to the reduction in the volume of the molding material, thereby shortening the working time.

Furthermore, since only a small amount of compound is required, large-sized products can be manufactured using the same extruder, which has great industrial benefits.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the manufacturing situation of one embodiment of the cable joint of the present invention, and FIGS. 2 a, b, and c are perspective views of reinforcing materials used in different embodiments of the cable connection of the present invention. FIGS. 3a and 3b are a cross-sectional view and a perspective view showing the arrangement of reinforcing members in other different embodiments. In the figure, 1 and 3 are cables, 2 and 4 are wire cores, 5 is an insulating tube, 6 is a mold, 7 and 10
...It is a reinforcing material.

Claims (1)

[Claims for Utility Model Registration] 1. At least two cables whose cable coating layers have been partially peeled off, and a connecting portion connected at at least one location of a plurality of wire cores exposed by the peeling of the cable coating layer. . A cable connection portion comprising a reinforcing material that is attached between the plurality of exposed wire cores and is long in the direction of the wire core, and a molded insulator that collectively covers the end portion of the cable, the wire core, and the reinforcing material. 2. The cable connection section according to claim 1, wherein the reinforcing material is arranged so as to surround at least a part of the outer periphery of the wire core to which the reinforcing material is attached. 3. The cable connection portion according to claim 2, wherein the reinforcing material has a hole through which a compound can flow.