JPH0215253Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a branch connection section of a flat cable.

Flat rubber or plastic cables, in which a large number of stranded conductors are arranged horizontally in a line and a flat rubber or plastic coating layer is provided on the outside, are sometimes used as vertical trunk cables for roofs of high-rise buildings. When connecting a branch line to this indoor vertical main cable, as shown in Figure 3A, the horizontal single-row stranded conductor 1', exposed by removing the covering layer, has a cross section u.
Both end edges 322', 322' of a collar 32' having a crescent-shaped cross section are covered with the sleeve main body 31' from the side and the branch line 4' is compressed and connected to the attachment part 321' in advance.
Both side walls 311', 311' of the sleeve body 31'
After that, the sleeve main body 31' is compressed, and the above-mentioned both end edges 322', 322' and both side walls 3
11' and 311', or, as shown in FIG. 3B, it is known to provide a mounting portion 321' for connecting a branch line on the sleeve body 31' side.

However, in these branch connection parts, the neck part n' is indispensable for attaching the attachment part 321', which is disadvantageous because the width dimension of the branch connection part becomes large.

In addition, in the case shown in FIG. 3A, a branch line attachment part 321' is provided on the collar 32' side, so that when a lateral force F' or a tensile force is applied to the branch line 4' (the branch line is attached (Since the main cable is laid in a state where it is exposed to external forces, it is difficult to avoid the effects of external forces).
There is a risk that the collar 32' may come off from the sleeve body 31'. Furthermore, in the branch connections shown in FIGS. 3A and 3B, for example, if an expansion force P' is applied to the sleeve main body while the cable is being stretched with the above-mentioned branch line attached, this expansion will occur. There is virtually no opposing presser member (in collar 32',
(Insufficient holding action against expansion of the sleeve body), the sleeve body tends to expand.

SUMMARY OF THE INVENTION The object of the invention is to provide a branch connection for flat cables which eliminates all of the above-mentioned disadvantages.

The branch connection part of the flat cable according to the present invention is a flat cable in which a large number of twisted wire conductors are arranged in a horizontal row and a flat rubber or plastic layer is coated on the outside. A line conductor is exposed, and a sleeve for connecting a branch conductor is compressed onto the exposed conductor, and the sleeve consists of a sleeve main body having a U-shaped cross section with an opening at one end, and a lid body sandwiching the open end of the main body, This structure is characterized in that a conductor insertion hole is provided in the thickness of the other end of the sleeve body, and the conductor of the branch line is compressed and connected in the hole.

The present invention will be explained below with reference to the drawings.

FIG. 1A is an explanatory longitudinal cross-sectional view showing a branch connection part of a flat cable according to the present invention, and FIG. 1B is an explanatory cross-sectional view taken along the line bb in FIG. 1A.

In FIGS. 1A and 1B, A is a flat cable in which a large number of stranded conductors 1, . Usually consists of two layers: an inner insulator layer and an outer sheath layer).
The conductors 1', . . . are exposed at the middle in the longitudinal direction. 3 is a flat sleeve for connecting branch conductors;
A sleeve main body 31 having a U-shaped cross section and an opening at one end, and a lid 32 that can hold the open end of the main body 31.
The joint 311 is an interlocking type. Reference numeral 4 denotes a branch line connection hole provided within the thickness of the other end of the sleeve body 31.

For the connection work, first, the sleeve body 31 is placed over the horizontal single-row stranded conductors 1, . The conductor 51 of the branch line 5 is inserted into the branch line connection hole 4 of the sleeve body, and then the entire sleeve is compressed with a compressor.

In the present invention, as shown in FIG. 2, a plurality of branch conductor insertion holes 4, . . . can be provided in the sleeve main body 31 to connect a plurality of branch wires.

The branch connection part of the flat cable according to the present invention has the configuration as described above, and the branch wires are connected through the branch line connection holes provided within the wall thickness of the sleeve, so the width dimension of the connection part can be reduced. Can be reduced. Furthermore, it has the following advantages.

Since the branch line is connected to the sleeve body side rather than the lid body side, it is mechanically safe even if external force is applied to the branch line (there is no fear of the collar coming off as in the case of Figure 3 A). . In addition, since the branch wire is connected to the sleeve body side, which has a larger contact area with the cable conductor of the flat cable than the cover side, the electrical resistance between the cable conductor of the flat cable and the conductor of the branch wire can be lowered and is electrically advantageous.

Even if an expansion force is applied to the sleeve body as shown by P in FIG.
The opening end of the sleeve body 31 is held between the opening ends of the sleeve body 31, and there is no hole for connecting a branch line in the lid body 32, and the lid body 32 acts as a strong holding member against the expansion of the sleeve body 31. 31 can be prevented from expanding.

That is, when one end 310' of the sleeve main body 31' covers the collar 32' as in the case of FIG. ′ is large (if its expansion force is P′ and the width of the sleeve body is l′, P′×l′ is large because l′ is large), and in this case, the sleeve If there is a hole in the thick wall at the other end of the main body 31', the moment resistance will be reduced and expansion will likely occur, but in the case of the embodiment of the present invention shown in FIG. Most of the sleeve rests on the lid 32 side, and since the lid 32 has a high moment resistance, it is possible to effectively prevent the sleeve from expanding.

[Brief explanation of the drawing]

FIG. 1A is an explanatory diagram showing an embodiment of the present invention;
Figure B is a sectional view taken along line bb in Figure 1A, Figure 2 is an explanatory diagram showing another example of the sleeve used in the present invention, and Figures 3A and 3B are explanatory diagrams each showing a conventional example. be. In the figure, 1, . . . are horizontal single-row stranded conductors, 3 is a sleeve, 31 is a sleeve body, 32 is a lid, 4 is a hole, and 51 is a conductor of a branch line.

Claims (1)

[Scope of utility model registration request] In the middle of a flat cable in which a large number of stranded wire conductors are arranged in a horizontal line and the outside is coated with a flat rubber or plastic layer, the above-mentioned horizontal single row stranded wire conductor is exposed, and a branch conductor is connected to the exposed conductor. The sleeve is compressed and consists of a sleeve body with a U-shaped cross section with an opening at one end, and a lid body that sandwiches the open end of the body, and a conductor insertion hole in the thickness of the other end of the sleeve body. A branch connection part for a flat cable, characterized in that the conductor of the branch line is compressed and connected in the hole.