JPS591293Y2 - Cable with branch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a branched cable particularly suitable for lighting tunnels, factories, etc.

Multi-line branch cables are often installed for lighting tunnels and factories.

In this case, the branch connections between the trunk cable and the branch cable are made according to the number of lines, but as the number of lines increases, it becomes difficult to perform branching work at the branch point.
If the cable is larger than the core, it becomes difficult to branch from the inner core.

FIG. 1 is a sectional view of a conventional seven-core cable, in which 1 shows a core conductor, 2 shows its insulation coating, 3 shows an inclusion, and 4 shows a sheath.

As is clear from the figure, one of the seven cores is arranged at the center of the cable, and the remaining six cores are arranged in a cylindrical shape around its outer periphery and housed within the sheath. Since the core is surrounded by wire cores, it has the disadvantage that branching, connection, and insulation processing are difficult.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a cable with branches that facilitates branch connection and insulation work even when the number of wire cores increases.

In other words, the gist of the present invention is to arrange a plurality of insulated wire cores in a circumferential shape inside the sheath in a cable made by twisting a plurality of insulated wire cores and applying a sheath to the outer periphery, and to make branch connections and connections inside the sheath. A space sufficient for insulation treatment is provided, this space is filled so that inclusions can be removed, and the connection portion formed by connecting the above-mentioned insulated wire core and the wire cores of the branch cable and insulating treatment removes the inclusions. The first point is that the branched cable is housed in the space formed by the cable and has a branched connection part.

This invention will be explained below with reference to an embodiment shown in FIGS. 2 to 4.

FIG. 2 shows the cable main body structure, and FIGS. 3 and 4 show branch connections between the cable and a branch cable.

In this embodiment, the number of cable cores is 10.

That is, 10 insulated wire cores, each consisting of a wire conductor 1 and an insulating coating 2, are arranged in a circumferential manner within a sheath 4, and a space for branch connection and insulation processing is set inside the sheath 4. This space is removably filled with inclusions 3 to form the cable 7.

At the branch connection section, the inclusion 3 is removed from the cable 7 to form a storage space, and the insulated core of the cable 7 and the core of the branch cable 5 are connected with a sleeve. The connection portion 6 is formed by insulating the surrounding area,
The connecting portion 6 is stored in the storage space, and finally insulated with a compound using a vinyl mold 8 or the like.

Here, the space required for the branch connection and insulation treatment should be provided at least at the location where the branch connection is planned for the cable 7, but if it is set over the entire length of the cable 7, the above-mentioned branch It is possible to reproduce the connection part.

As is clear from the above explanation, this idea consists of arranging multiple insulated wire cores in a circumferential manner within a sheath, providing enough space for branch connections and insulation treatment inside the sheath, and removing any inclusions in this space. The insulated wire core and the wire cores of the branch cable are connected to each other and the connection portion formed by insulating the wire cores is housed in the space formed by removing the inclusions. Since the branch connection part is configured with a 3-wire structure, the branch connection work of insulated wire cores can be performed extremely easily without being interfered with by other insulated wire cores, which eliminates the difficulty of branch connection due to an increase in the number of wire cores. This has the effect of making the branch connection more compact, and the practical benefits are enormous, since the connection part can be housed within the insulated wire cores without significantly disrupting the arrangement of the insulated wire cores.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a conventional cable, Fig. 2 is a cross-sectional view showing an example of the cable main body structure of a cable with a branch according to the present invention, and Fig. 3 is a cross-sectional view showing an example of the structure of the cable main body of a cable with a branch according to the present invention. FIG. 4 is an enlarged view of the cross-sectional view taken along the line A--A in the same figure. 1: Core conductor, 2: Insulating coating, 3: Inclusion, 4. Sheath, 5: Branch cable, 6: Connection part, 7: Cable.

Claims (1)

[Scope of utility model registration request] In a cable consisting of a plurality of insulated wire cores twisted together and a sheath applied to the outer periphery, the plurality of insulated wire cores are arranged circumferentially within the sheath and branch connections and insulation treatment are performed inside the sheath. A sufficient space is provided, this space is removably filled with inclusions, and the connection portion formed by connecting the insulated wire core and the wire cores of the branch cable and insulating them is provided with the inclusions removed. A branched cable configured to be housed within the formed space.