JPS5920258B2 - End block for cable connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an end block for a cable connection.

In the cable connection section, the core connection section where the core wires are connected to each other is surrounded by a cylindrical outer shell, and the openings at both ends of the outer shell are closed and sealed with end blocks.

In this case, the cable passes through the end block.

Conventionally, as such an end block 1, as shown in FIG. Ta.

However, since such an end block 1 has a split surface 3 that crosses the entire end block 1, this is one factor that reduces the reliability of sealing performance.

Furthermore, as shown in FIG. 2, an end block 1 with a cut surface has also been proposed.

This end block 1 includes a plurality of cable through holes 4 in a block body 2, and a conical cylindrical seal protrusion 5 protruding from one side of the block body 20.
They each have a blocking/da structure (・ru.

When such an end block 1 is used, the tip of the seal protrusion 5 is cut off, a hole is made in the seal protrusion 5, and a cable is passed through the hole and introduced into the outer shell.

Therefore, the end block 1 can be attached to the outer periphery of the cable without making any cuts, which is very advantageous in terms of sealing performance.

However, among the methods of connecting cables, there are cases in which the core wires are not cut or connected, but branched and connected to the core wires of other cables.

In such a case, a part of the end block 1 shown in FIG. 2 in the circumferential direction is cut out to reach the cable through hole 4.
It is necessary to pass the cable through the cable through hole 4 using the opening.

However, it is not easy to cut neatly into the thick block body 2 of the end block 1 as shown in FIG. 2 on site, resulting in poor workability and drawbacks.

The object of the present invention is to be able to easily crack the block body on site despite the type having a protruding part for sealing, and to be able to easily crack the block body without cracking or sometimes with no cracking at all. An object of the present invention is to provide an end block for a cable connection part having similar sealing performance.

Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings.

3 and 4 show an embodiment of the end block 1 according to the present invention.

This end block 1 is made of a molded product such as plastic or rubber, and has a disc-shaped block body 2 with a plurality of cable through holes 4, and these cable through holes 4 are integrated into the outer surface 2A of the block body 2. Each block body 2 is closed with a conical cylindrical seal protrusion 5 protruding from the block body 2.
On the inner surface 2B side of the block body 2 (also, splitting bars 6 are provided with a length that does not reach the outer circumferential surface 2C and outer surface 2A of this block body 2 from each cable through hole 4 toward the circumferential direction of the block body 20).・Ru.

When such an end block 1 is used for a cable connection section where a cable is cut, the tip of the seal protrusion 5 can be cut off and the cable can be passed through the resulting hole.

In this case, the split bars 6 do not reach the outer circumferential surface 2C and the outer surface 2A of the block body 2, and the split bars are completely
The same sealing performance as conventional end blocks can be obtained.

When using the end block 1 of the present invention at a cable connection where a branch connection is made without cutting the cable, cut the tip of the seal protrusion 5 and cut the block body 2 on the extension of the split reinforcement 6. The split bar 6 is set to reach the outer circumferential surface 2C and the outer surface 2A of the block body 2, and the split bar 6 is also continuously inserted into the seal protrusion 5, and the split bar 6 is opened to allow the cable to pass through. .

FIG. 5 shows an example of a cable connection using the end block 1 with the split bars 6 cut out in this way.

The cable 7 is introduced into a cylindrical outer shell 8, and a core connection part 9, which is a connection part between each core wire, is accommodated therein, and the sheaths 10 of the cables 7 to be connected are connected to a sheath retaining fitting 11. They are interconnected by a tension member 12 through which the tension from the cable 7 does not act directly on the core connection part 9 even when the temperature is high.

Both ends of the outer shell 80 are closed with an end block 1, and a cable 7 is passed through the cable through hole 4 of the end block 10 using a split bar 6 that is cut open, and a sealing material is applied to the split bar 6 that is cut open. 13 is interposed at ℃・ru.

A seal taping layer 14 is formed on the outer periphery of the seal protrusion 5 through which the cable 7 passes, spanning the cable 7.

A sealing material 15 is provided between the end block 1 and the outer shell 8.
is interposed and the temperature rises.

The outer shell 8 is split into two parts in the longitudinal direction, and the split surfaces 8A of the outer shell 8 are butted together with a sealant interposed therebetween, and are tightened with a tightening band 16 wrapped around the outer circumference of the split surfaces 8A of the outer shell 8. Then, the outer shell 8 and the end block 1 are sealed and heated.

As explained above, although the end block for a cable connection part according to the present invention is of the type having a cylindrical sealing protrusion that closes the cable through hole of the block body, there is no cable through hole on the inner side of the block body. Split bars can be provided in the circumferential direction of the block body with a length that does not reach the outer peripheral surface of the block body, so when passing an uncut cable through the cable through hole of this end block. To do this, it is only necessary to cut a small portion of the block body and the sealing protrusion in the direction of extending the splitting line, and the cutting work can be easily and easily performed on site.

In addition, when used at the connection of a cut cable, even if there is a split bar, this split bar does not reach the outer surface or peripheral surface, so it can achieve the same effect as a type without split bar. be able to.

[Brief explanation of the drawing]

1 and 2 are perspective views showing two types of conventional end blocks, FIG. 3 is a rear view showing an embodiment of the end block according to the present invention, and FIG. 4 is a perspective view showing two types of conventional end blocks. - An X-ray sectional view, and FIG. 5 is a partially vertical side view of a cable connection section using the end block of the present invention. 1... End block, 2... Block body, 2A
...outer surface, 2B...inner surface, 2C...outer surface, 4.
... Cable through hole, 5 ... Seal protrusion, 6...
・Split muscle.

Claims (1)

[Claims] 1. An end block for a cable connection part that has a cable through hole in the block body and a seal protrusion that closes the cable through hole on the outer surface of the block body (
・On the inner surface of the end block, a splitting line is provided from the cable through hole toward the outer periphery of the end block with a length that does not reach the outer periphery and outer surface of the end block. An end block for a cable connection section, which is characterized by: