JPS6041785Y2 - Multi-core cable terminal structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a terminal structure of a multi-core cable.

Conventionally, when connecting the cores of electrical cables such as multi-core cross-linked polyethyl insulated cables (hereinafter referred to as CV cables) or OF cables, the work process has been to first strip the cables, then conductor connections and The wire core is drawn out to the length required for insulation reinforcement, and the process proceeds to the conductor connection process after steps such as straight-out work to remove the twist, but in the case of 3-core cables, especially C■ cables, During this core straight-out work, a jig made of wood or other material is inserted between the wire cores, and this is used as a fulcrum to untwist the core, which is done manually. The wooden jig will soon be removed, but as a result, the wire core may untwist, the wire core may remain bent and connected, or the insulator or shield may be damaged when the wooden jig is removed. Currently, there are situations where insulation reinforcement work is hindered.

An object of the present invention is to eliminate the drawbacks of the prior art described above, and to provide a cable terminal structure that allows the cable core to be connected with the core fully exposed.

In other words, the present invention connects the cores of a multi-core cable, and uses a cone-shaped body made of an insulating or semiconductive material such as rubber or plastic at the end thereof, and a pipe made of a heat-shrinkable material fixed at an equal angle to the side of the cone-shaped body. The cable terminal structure is formed by inserting a thermal member consisting of a shaped body.

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a plan view of an embodiment of the present invention using a multi-core cable as an example.

That is, a terminal structure is formed in which a pipe-shaped body 2 made of a heat-shrinkable material is fixed to each ridgeline of a triangular pyramid 1 made of an insulating or semiconductive material, and 3 is a cable core inserted into the end structure. Indicates the hole to be filled.

Further, FIG. 2 is a partial sectional view of the terminal structure taken along line 1--2 in FIG.

FIG. 3 is a cross-sectional view taken along the line ■-■ in FIG. 1 when a terminal structure similar to that shown in FIG. indicates the cable insulator, 12 indicates the outer conductor, and 13 indicates the cable insulator.
1 represents a cable shield, and 14 represents a cable sheath.

In FIG. 3, the ridgeline of the triangular pyramid 1 is curved, and accordingly, the pipe-shaped body 2 is also curved accordingly, and has a shape suitable for keeping the cable ends parallel.

The working process will be explained with reference to FIG. 3. First, the sheath 14 at the end of the cable to be connected is stripped off and the cable core is taken out.

Next, the pipe-shaped body 2 of the pre-formed terminal structure
Pass the wire core through the hole 3 and insert the terminal structure to a predetermined position.

By this insertion, the wire core is expanded outward, and the wire core is directly pulled out by bending the cable further in the opposite direction using the cone as a fulcrum.

After the cores are directly taken out, each core is held and fixed to the cable by heating and contracting the pipe-shaped body 2.

FIG. 3 shows the state in which the cable core is fixed in this manner.

Regarding the material of the cone-shaped body 1 of the terminal structure, for example, when a rubber cone-shaped body is used, the cone-shaped body 1 has a hardness that does not deform under the stress applied during the work of directing the wire core, that is, a hardness of JIS hardness 70 or higher. A suitable material is
The pipe-like body 2 is not shrunk during the direct extraction operation, and therefore there is no possibility that it will be subjected to stress, so it only needs to have a strength that can hold the wire core.

According to the terminal structure according to the present invention, the following effects can be expected.

1. Stripping work, conductor connection work, and insulation reinforcing work when connecting cable cores can all be performed with the core exposed completely.

2. After the wire core is directly removed, the pipe-shaped body is heat-shrinked to hold the shield, so there is no damage to the copper tape, which is the external conductor, during restoration.

3. By using a semiconducting material as the pyramid, it is expected that the electric field at the end of the cable's external conductor will be alleviated.

Note that the shapes of the cone-shaped body and the pipe-shaped body are arbitrary.

Figure 4 shows a typical example, where a is a cone and b is a cone.
1 is a triangular pyramid but the fixed position of the pipe-like body is different from that in FIG. 1, and b is an exemplary sectional view at an appropriate position of a square pyramid.

Figure 5 is a diagram similar to Figure 2 of another example, and Figure 6 is a diagram similar to Figure 2 of another example.
The figure shows the length of the pipe-like body being shorter than the length of the cone ridge line.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the terminal structure of the present invention, and Fig. 2 is a plan view of the terminal structure of the present invention.
3 is a sectional view when the terminal structure of the present invention is applied to a multi-core cable; FIG. 4 is a schematic plan view of another embodiment of the present invention; The figure is a partial cross-sectional view showing another embodiment of the present invention, and FIG. 6 is a partial cross-sectional view of still another embodiment of the present invention. 1... Cone-shaped body, 2... Pipe-shaped body, 3
...hole, 10 ... cable conductor, 11
... Cable insulator, 12 ... Cable outer groove, 13 ... Cable shield, 14 ...
...Cable sheath.

Claims (1)

[Claims for Utility Model Registration] 1. A pyramid-shaped body, a plurality of heat-shrinkable pipe-shaped bodies fixed at approximately equal angular intervals to the pyramid-shaped body and having arbitrary lengths through which cable cores can be inserted, and these pipe-shaped bodies. A multi-core cable terminal structure consisting of a cable core that is attached to the body. 2. The multi-core cable terminal structure according to claim 1, wherein the pyramid-shaped body is made of a semiconductive or highly resistive material.