JPS6015396Y2 - Adhesive sheet for cable connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an adhesive sheet used for communication or power cable connections.

In particular, when connecting cables, including the core wire, coaxial core, and cable sheath, the work may take a long time. It is necessary to apply

The present invention relates to the improvement of an adhesive sheet suitable for this temporary waterproof and airtight treatment.

Conventionally, this type of waterproof and airtight treatment has been carried out as shown in FIGS. 1 and 2.

FIG. 1 is a cross-sectional view of the upper half of a conventional waterproof and airtight structure.

FIG. 2 is a longitudinal sectional view showing how a conventional adhesive sheet is used.

That is, in order to airtightly protect the connecting portions 5 of the communication cables 1.2 and 3, an adhesive rubber sheet 6 is vertically wrapped around the outside, and a rubber tape 7 is further wound over the entirety.

Next, a clamp band 8 is attached to the end of the rubber tape 7 to improve the watertightness and airtightness between the space 9 of the connection part 5 and the outside air.

Further, if necessary, a viscoelastic moisture-proof mixture 10 is filled between the cable jacket of each communication cable 1 to 3 and the end portion of the adhesive rubber sheet 6.

Here, as shown in FIG. 2, the structure of the adhesive rubber sheet 6 is as shown in FIG.
2 are laminated, and a non-adhesive layer 13 is laminated on the other side.

In order to wrap the adhesive rubber sheet 6 vertically around the cable connection part 5 as shown in FIG. After that, bend this part in the direction of the arrow shown in FIG.

Next, a rubber tape 7 is wound around this outside.

At this time, due to the external force of the rubber tape 7 or the pressure of the cable maintenance gas supplied into the cable, one adhesive layer 12 adheres to the other adhesive layer 12 and peels off, as shown by the large arrow in FIG. A part 1 of the fiber cloth 11
1' may be exposed.

In this case, there is a disadvantage that a leakage path for the maintenance gas is formed along this exposed portion 11'.

The present invention improves on this point. Even if one adhesive layer adheres to the other adhesive layer, a leakage path for maintenance gas will not be formed, resulting in excellent watertightness and airtightness for a long time. The purpose of the present invention is to provide an adhesive sheet having the following properties.

The present invention is constructed by laminating a base layer containing vulcanized rubber as the main component on one side of the fiber cloth, and further laminating an adhesive layer containing unvulcanized rubber as the main component on top of this base layer. It is characterized by having been.

An embodiment of the present invention will be described based on the drawings.

FIG. 3 is a cross-sectional structural diagram of an embodiment of the present invention.

The adhesive rubber sheet 6 according to the present invention is composed of three layers: a fiber cloth 15, a base layer 16, and an adhesive layer 17.

That is, the fiber cloth 15 is made of synthetic fiber or natural fiber, and has the least elongation among the layers and the highest tensile strength.

A base layer 16, which is a feature of the present invention, is adhered to one side of the fiber cloth 15 with an adhesive (such as rubber glue 18).

The base layer 16 is made of vulcanized rubber, which is somewhat more extensible than the fiber cloth 15, as a main component, such as neoprene rubber, ethylene propylene rubber, butyl rubber, etc.

An adhesive layer 17 is formed on the other surface of the base layer 16 by an adhesive 18.
is pasted.

This adhesive layer 17 is made of unvulcanized rubber as a main component, and is
The adhesive layers have the property of easily adhering to each other by pressing for a second.

A separator (release paper or cloth) 19 made of paper or cloth is adhered to the surface of the adhesive layer 17 with one end thereof protruding from the adhesive layer 17 .

The adhesive rubber sheet thus constructed is used as shown in the fourth example.

FIG. 4 is a longitudinal cross-sectional view showing how this adhesive rubber sheet is used.

Now, this adhesive rubber sheet 6 is wrapped vertically around the outer periphery of the connection part 5 of the communication cable.

At the same time, the separators 19 at both ends of the adhesive rubber sheet 6 are peeled off, the adhesive layers 17 are adhered to each other, this is bent inward, and the rubber tape 7 is wound from above.

At this time, even if a part of the adhesive layer 17 adheres to the other adhesive layer 17 and is peeled off, as shown by the large arrow in FIG. Therefore, the fiber cloth 15 does not protrude.

Therefore, even if gas for cable maintenance is sealed, this gas will not leak.

Furthermore, since the base layer 16 has a high elongation rate and is elastic, cracks do not occur at the bent portions.

As explained above, according to the present invention, a base layer mainly composed of vulcanized rubber is laminated on one side of the fiber cloth, and an adhesive layer mainly composed of unvulcanized rubber is further laminated on top of this. It was configured as follows.

Therefore, even if a part of one adhesive layer adheres to the other adhesive layer and peels off for some reason, the fiber cloth will not be exposed and the excellent effect of maintaining watertightness and airtightness. has.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the upper half showing a conventional waterproof and airtight treatment structure, Figure 2 is a longitudinal cross-sectional view showing how a conventional adhesive rubber sheet is used, and Figure 3 is a main part of the present invention - an example. FIG. 4 is a longitudinal sectional view showing the usage state of the above embodiment. 1 to 3...Communication cable, 5...Connection part, 6...Adhesive com sheet, 7...
Rubber tape, 8, song, clamp band, 9...
Space part, 10... Moisture-proofing mixture, 11.11'
...Fiber cloth, 12.17...Adhesive layer,
13...Non-adhesive layer, 16...Base layer,
18...Adhesive, 19...Separator.

Claims (1)

[Scope of utility model registration request] A protective sheet for cable connections that has an adhesive layer on one side and is used to airtightly cover connected cables from the outside, consists of a belt-shaped fiber cloth and a sheet formed on one side of the fiber cloth that is made of vulcanized rubber as the main component. a base layer formed on the base layer; an adhesive layer containing unvulcanized comb as a main component;
An adhesive sheet for cable connection, comprising a separator stuck on the adhesive layer.