JPS603632Y2 - Structure of temporary cable reconnection part - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a temporary reconnection section for communication and power cables.

More specifically, the present invention relates to a connection structure for temporarily applying waterproof and airtight treatment to a temporarily connected portion of a cable that has been subjected to waterproof and airtight treatment after it is once dismantled for connection work such as a core wire.

When connection work such as communication cables takes a long time,
It is common practice to temporarily stop the work midway through the process, create a temporary connection state, and apply a temporary waterproof and airtight treatment to the connection area.

Moreover, even if you start connecting the core wires again from this temporary connection state, the connection work may still not be completed, so it is recommended to put the temporary connection part back into the temporary connection state and perform waterproof and airtight treatment. It must be devised so that it can be done.

A conventional structure for this purpose is shown in FIG.

That is, the connection part 1 between the communication cables C1, 02, and C3
In this step, the moisture-proofing mixture 2 is adhered to the periphery of the communication cables C2 and C3, and an adhesive rubber sheet 104 formed in the shape of a hollow cylinder is placed on the outside of the moisture-proof mixture 2.

During the initial reconnection work, cut the center part of the adhesive rubber sheet 104 in the circumferential direction, push it out to both sides, and open the opening part A.
form and work again from here.

If the work is to be further interrupted, another adhesive rubber sheet 105 for repair is wound and glued in the circumferential direction around this opening part A to seal the connection part 1, and the gas pressure of the cable of the adhesive rubber sheet 104 is applied from the outside. A rubber tape 106 is evenly wrapped to prevent expansion caused by the heat transfer, and is sealed, as well as to prevent mechanical damage from the outside world.

Rubber tapes 10 located at both ends of this rubber tape 106
6a and 106b are the clamp 107 and the holding tape 1
It is fixed at 08.

This conventional structure has the disadvantage that the winding and unwinding of the rubber tape 106 during reconnection work is extremely complicated and requires a lot of man-hours and skill.

In addition, during winding and unwinding of the rubber tape 106, the dam of the moisture-proofing mixture 2 may be destroyed, and the adhesive portion between the bent portion 104a of the adhesive rubber sheet 104 and the repair adhesive rubber sheet 105 may be damaged. There were drawbacks such as insufficient adhesion and an inability to maintain an airtight structure.

This idea was made to eliminate these drawbacks of the conventional technology, and it not only makes temporary connection work quick and easy, but also ensures waterproof and airtightness for a long time without requiring special skill. Moreover, it is an object of the present invention to provide a temporary reconnection section for cables that allows easy temporary reconnection and temporary reconnection.

The connection structure of this invention consists of a base layer that is attached vertically in the form of a hollow cylinder to cover the connection part of the cable, is integrally attached to one side of the fiber cloth, and is mainly composed of vulcanized rubber; An adhesive sheet having an adhesive layer mainly composed of unvulcanized rubber adhered thereto, and wrapping in the circumferential direction of a folded part formed by cutting this adhesive sheet in the circumferential direction. It is characterized in that it includes a bonded repair adhesive sheet, a winding part that wraps the adhesive part inside, and a protective cover that covers the outside of the adhesive sheet.

Next, a more detailed explanation will be given with reference to the drawings of the embodiments.

First, the adhesive sheet used in the present invention will be explained with reference to FIG. 2. FIG. 2 is a cross-sectional structural diagram of the adhesive sheet used in the present invention.

This adhesive sheet 10 has a base layer 12 mainly composed of vulcanized rubber attached to one side of a fiber cloth 11 whose tensile strength is increased by nylon thread or the like.
An adhesive layer 13 is formed by adhering an adhesive material mainly composed of unvulcanized rubber thereon, and a separator 14 such as a release cloth (or paper) is further formed on the adhesive layer 13 with a part thereof protruding. It is attached as a whole and is integrated as a whole.

FIG. 3 is a structural diagram of the protective cover.

The protective cover 20 corresponds to the size of the adhesive sheet 10 and covers the adhesive sheet 10 separately or integrally with a sheet-like cover 21 having water resistance, weather resistance, and tensile strength (for example, fiber cloth) in the length direction of the cable. As shown in FIG. 3a, a belt-shaped tightening belt 22 (for example, a synthetic fiber belt) having ice resistance, weather resistance, and tensile strength, and a stopper 23 sewn to the tip of this tightening belt 22. A plurality of cables are attached at appropriate intervals along the length of the cable.

The tightening belt 22 is slightly longer than the width of the cover 21, and its tip is free with respect to the cover 21.

The stopper 23 is attached to the proximal end of the tightening belt 22 and has two ring shapes in the illustrated example, and as shown in FIG. It can be tightened and fixed by reversing the part and pulling it through only one ring.

Note that the fastener 23 is not limited to such a fixing structure.

FIGS. 4, 5, and 6 are diagrams showing the structure of an embodiment of this invention.

Figure 4 is a partially cutaway structural diagram showing the connected cables C1,
It has a structure in which the moisture-proofing mixture 2 is adhered and filled around C2 and C3, the above-mentioned adhesive sheet 10 is covered from the outside, and the above-mentioned protective cover 20 is further covered on the outside.

A chain line 10c indicates a position to be cut when re-working is performed.

FIG. 5 is a partially cutaway structural diagram after reworking, and FIG. 6 is a diagram showing in more detail the processing structure of the cut portion after reworking.

In other words, in this embodiment, when starting the reconnection work,
First, after removing the protective cover 20, the central part 10c of the adhesive sheet 10, which is formed into a hollow columnar shape and covers the connecting part 1, is removed.
is cut in the circumferential direction, and the adhesive sheet 10 is attached to the cable C1.
, flip it up and move it to the C2 and C3 sides.

Next, the exposed connection portion 1 is connected.

To temporarily connect the adhesive sheet 10 again, the adhesive sheet 10 is folded back to both sides to form a folded portion 10a, and another repair adhesive sheet 3 of the same quality is wound on top of the folded portion 10a. Glue the attachment.

Further, the adhesive portion 10a between the adhesive sheet 10 and the repair adhesive sheet 3 is rolled up inside to form a rolled-up portion 10b, thereby airtightly closing the inside of the adhesive sheet 10.

Cover the protective cover 20 from the outside and tighten the aforementioned tightening belt 22.

With such a structure, when gas is filled in the connection part 1, the state of the repair adhesive sheet 3 is such that the wound part 10b of the adhesive sheet 10 is at the point Q, as shown in FIG. Since the repair adhesive sheet 3 is in contact with the outside of the adhesive sheet 10 and is pressed by the gas pressure P of the connecting portion 1 and the protective cover 20, the repair adhesive sheet 3 is reliably fixed.

FIG. 7 shows a temporary re-connection section obtained by cutting out the temporary re-connection section of the embodiment of the present invention once more.

That is, the repair adhesive sheet 3 is cut open and the work is performed again, but if the work is still not completed, the cut adhesive sheet 3 is folded back as shown in the figure, and another repair adhesive sheet 3' is placed on top of it. By covering it, a sealed structure can be created.

In this manner, the structure of the present invention allows the temporary reconnection operation to be repeated any number of times.

In this case, the protective cover 20 located on the outside of the connection part can be easily attached and detached by operating the tightening belt 22, so that the total number of temporary sealing operations is extremely reduced.

The above example concerns a temporary reconnection section of a communication cable.

Although described above, the structure of the present invention can also be applied to a power cable connection part.

As explained above, according to the present invention, ■ The outermost protective cover can be easily attached and detached by operating the tightening belt, and has excellent waterproof and airtight properties, so it does not take much time to work and does not require special Since no skill is required, temporary reconnection can be performed efficiently. ■ The adhesive part between the folded part of the adhesive sheet and the repair adhesive sheet is rolled inward, creating a synergistic effect between gas pressure and the protective cover. ■ Since the protective cover is removable even after repeated temporary reconnections, the dam of the moisture-proofing mixture will not be destroyed and the waterproof and airtightness will be maintained. It has excellent effects such as .

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing a temporary reconnection section of a conventional communication cable. FIG. 2 is a sectional view showing an example of the adhesive sheet used in this invention. 3A is a plan view showing an example of a protective cover used in this invention, and FIG. 3 is a diagram illustrating the use of a tightening belt and a stopper. 4 and 5 are partially cutaway side views showing the structure of an embodiment of this invention. FIGS. 6a and 6b are partially enlarged sectional views showing folded portions of adhesive sheets corresponding to the embodiment structures shown in FIGS. 4 and 5, respectively. FIG. 7 is a partially cutaway side view showing the structure of the temporary re-connection section according to an embodiment. 1...Connection part, 2...Moisture-proofing mixture,
3...Adhesive sheet for repair, 10...
Adhesive sheet, 11...Fiber cloth, 12...
... Base layer, 13 ... Adhesive layer, 14 ...
・Separator, 20... Protective cover, 21...
...Cover, 22...Tightening belt, 23.
Bend/stop metal fitting, 104...Adhesive rubber sheet, 1
05...Adhesive rubber sheet for repair, 106...
... Rubber tape, 107 ... Clamp band, 108 ... Presser tape.

Claims (1)

[Scope of utility model registration request] A cable comprising a fiber cloth, a base layer made of vulcanized rubber as a main component integrally attached to one side of the fiber cloth, and an adhesive layer made of unvulcanized rubber as a main component adhered on top of this base layer. A repair in which an adhesive sheet is attached vertically in a hollow cylindrical shape to cover the connection part, and the approximately center part of this adhesive sheet is cut on the circumference and glued with the adhesive surface aligned with the folded part formed. The repair adhesive sheet has a structure in which the adhesive part of the repair adhesive sheet and the vertically attached adhesive sheet is wound inside, and is tightened by a tightening belt on the outside of this adhesive sheet. A structure of a temporary reconnection part of a cable, characterized in that it is provided with a protective cover.