JPS6334219Y2 - - Google Patents

Description

[Detailed description of the invention] This invention insulates the branch connection part, which consists of stripping off the insulation coating at any position of the main cable to expose the conductor, and connecting the conductor of the branch cable to the exposed conductor. This relates to improvements in insulating covers used for processing.

When taking out the branch cable from the main cable,
As an insulating treatment for the branch connection part made up of both, so-called pre-molded insulation is known, in which the connection part is molded with epoxy resin in order to maintain airtightness, watertightness, and appropriate strength. However, when installing cables on site,
If there is a change in the deep extraction position, it is difficult to cope with the above insulation treatment, and a new branch must be constructed.

Therefore, it is possible to pre-mold only the insulating cover corresponding to the pre-molded insulator mentioned above,
Then, during branching work, the insulating cover is attached over the conductor connection part to perform insulation treatment.

The most commonly used cover is a so-called split-back type insulating cover, which has a cylindrical shape with a cut in the longitudinal direction so that it can be opened from the side so that the work only needs to be done once. According to
Since the cover itself must have sufficient strength to prevent injury, it is made hard and somewhat thick, and therefore has poor elasticity, making it difficult to attach the cover to the connecting part by opening the back part. Sometimes, unreasonable deformation may cause distortion, which may lead to permanent deformation, making it difficult to ensure reliable and easy coating.

In addition, after the cover is attached, the back split part must be airtight and watertight, so it must be tightly closed with adhesive, etc., but uneven adhesion often occurs and the adhesion is insufficient. It was difficult to obtain

The object of the present invention is to provide an improved insulating cover of this type which overcomes the drawbacks of the prior art mentioned above.

That is, as shown in FIGS. 1 and 2, an enlarged cylindrical portion 2 is formed having a cavity 1 sufficient to accommodate the conductor connection portion at the center in the axial direction, and the enlarged cylindrical portion 2 is They are connected to form a first diameter-reduced cylindrical part 4 having a hole 3 for inserting the main cable at one end in the axial direction, and a main cable is connected to the enlarged cylindrical part 2 at the other end in the axial direction. A second diameter-reduced cylindrical portion 6 is formed which has holes 5 and 5' for insertion and branch cable insertion, respectively. An axial cylindrical wall portion 2 extending from the forming portion through the enlarged cylindrical portion 2 to the forming portion of the main cable insertion hole 3 of the first reduced diameter cylindrical portion 4
0 to have a thin wall L ₁ , and the first cylindrical portion is formed from the part where the trunk cable insertion hole 5 is formed in the second diameter-reduced cylindrical portion through the enlarged cylindrical portion 2 and facing the thin-walled cylindrical wall portion 20 . The axial cylindrical wall portion 30 extending up to the formation portion of the trunk cable insertion hole 3 of the section 4 is formed with a thick wall _l2 , and the slit portion 40 is formed along the entire axial length of the thick cylindrical wall portion 30. It is formed by forming.

In order to attach the insulating cover of the present invention constructed in this manner to a branch connection, first open it from the cut section 40 using the thin wall section 20 as a starting line, and then guide the cable from the opened section to the side and branch it. Cable W ₁
is inserted into the hole 5' and pulled out to the outside, the conductor connection part J is accommodated in the cavity 1 at the same time, and the main cable W ₂ is inserted into the opened hole in each of the first and second cylindrical parts 4 and 6. 3 and 5, and in this state close the thick part 30 of the cover 10 to adhere the torn part 40, and to make each hole 3 and 5 tightly contact the outer periphery of the main cable _W2 . be.

After this, it is advisable to wrap and tighten the cover 10 from its outer periphery using a plastic band.

In addition, apply adhesive to the insertion holes 3 and 5 of the main cable and the insertion hole 5' of the branch cable, and connect the cable W _1.
It is recommended to attach it to the outer periphery of W ₂ .

Furthermore, in the above-mentioned embodiment, the part surrounding the branch cable insertion hole 5' is not cut out, but a cut is made in this part as well, so that the branch cable can be inserted into the branch connection part. It is also possible to make it even simpler.

As explained above, according to the insulating cover for branch connections of the present invention, even if the material is hard, it can be opened starting from the thin cylindrical wall part that has appropriate hardness and elasticity, so that branch connections can be opened. It is easy to attach the special connection form at the part, and it is also easy to reliably and tightly fit the cut part after installation, and the cut part forms a cylindrical part. By providing it in the thick part of the cylindrical wall, it is possible to obtain appropriate strength and sufficient bonding margin without forming unnecessary protrusions from the outer surface of the cover. This has the effect of achieving a bond that maintains sufficient airtightness and watertightness with little unevenness, and takes advantage of the advantage of the split-back type insulating cover, that is, it only needs to be installed once. Its practical value is enormous as a means of ensuring reliable insulation of branch connections.

[Brief explanation of the drawing]

The attached drawings show one embodiment of the insulating cover for a branch connection part of the present invention, and FIG. 1 shows the appearance of the insulating cover, where A is a left side view, B is a front view, C is a right side view, and FIG. FIG. 2 is a sectional view taken along line a-a in FIG. 1A. DESCRIPTION OF SYMBOLS 10... Insulating cover, 20... Thin cylinder wall part, 30... Thick cylinder wall part, 40... Cutting part.

Claims (1)

[Scope of utility model registration request] A first reduced-diameter cylindrical shape having an enlarged cylindrical part for storing a conductor connection part in the center in the axial direction, and having a hole for inserting the main cable at one end side in the axial direction, which is connected to the enlarged cylindrical part. At the same time, a second reduced diameter cylindrical part is formed in series with the enlarged cylindrical part and has a hole for the main cable insertion and a branch cable insertion hole on the other end side in the axial direction. , an axial cylinder wall portion extending from the part where the branch cable insertion hole is formed in the second reduced diameter cylindrical part through the enlarged cylindrical part to the part where the main cable insertion hole is formed in the first reduced diameter cylindrical part; is formed to have a thin wall, and is for passing the trunk cable of the first cylindrical part from the part where the trunk cable insertion hole of the second reduced diameter cylindrical part is formed, through the enlarged cylindrical part, and facing the thin cylindrical wall part. A branch connection part characterized in that an axial cylindrical wall part extending up to the hole forming part is formed with a thick wall, and a cut part is formed along the entire axial length of this thick cylindrical wall part. insulation cover.