JPH08149670A - Cable protecting member and its manufacture - Google Patents

Abstract

PURPOSE: To integrally form high-hardness or hardly machinable chip members and sheet-like elastic member by spreading the chip members all over one surface of the elastic member so as to make a cable protecting member to be able to be inserted surely into a duct line even when a cable is laid in a curved state and improve the withstand voltage of the protecting member. CONSTITUTION: In a cable protecting member 10, a fiber net 12 is formed on the surface of a sheet-like elastic member composed of neoprene rubber 11. On the net 12, a plurality of chips 13 composed of a sintered hard alloy or ceramic are arranged in a prescribed direction. The member 10 in which the chips 13 and neoprene rubber 11 are integrally formed is obtained by subjecting the member 10 to vulcanization and forming by applying a pressure of about 200×10<5> Pa to the member 10 for about 10 minutes while the member 10 is heated to about 170 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable protecting member and a method for manufacturing the same, and more particularly to a cable protecting member for protecting an existing cable in a pipe such as a manhole and a method for manufacturing the same.

[0002]

2. Description of the Related Art At present, when reconstructing manholes, handholes, etc., work such as demolishing concrete forming the pipelines with picks, drills, cutting the pipelines with sanders, etc. is performed. ing. When the concrete is demolished, a cable protection member is inserted into the pipeline so as not to damage the existing cable contained in the pipeline and cause a failure.

For example, as shown in FIG. 5, when the waterproof concrete 1 in the manhole is demolished by a drill 2 or the like, the existing cable 4 in the pipeline 3 formed in the waterproof concrete 1 is not damaged. Then, the half-divided plate 5 is inserted as a cable protection member along the cable 4. As shown in FIG. 6, the half-divided plate 5 has a shape in which a circular pipe is divided in half in the longitudinal direction, that is, an arcuate shape along the cable. Has a length of 1000 mm and a thickness of 2.3 mm.

By inserting such a half-split plate 5 into the pipe line 3, as shown in FIGS. 7 (a) and 7 (b), the cutting work by the blade of the pick and drill 2 and the pipe by the sander 6 are carried out. The existing cables 4 are prevented from being inadvertently damaged when the work such as the round cutting is performed.

[0005]

However, the above-mentioned conventional half-divided plate 5 is made of stainless steel and has no flexibility. However, since the cable 4 is bent vertically and horizontally at the end of the duct, even if the half plate 5 for protecting the cable is inserted into the pipe line 3, it may not be actually inserted.

Further, the stainless steel which constitutes the half-split plate 5,
Since the altitude is about 200, it has a problem that the proof stress against picks, drills, sanders, etc. is low. The present invention has been made in view of the above problems, and even if the cable is bent and laid, it can be reliably inserted into the pipeline, and the cable protection member has high resistance to picks, drills, sanders, and the like. And its manufacturing method.

[0007]

That is, according to the present invention, a sheet-like elastic member facing a cable so that one surface thereof is protected, and an elastic member formed integrally with the elastic member are provided. It is characterized by comprising a chip-shaped member laid on the other surface of high hardness or difficult to cut.

Further, according to the present invention, a step of laying a high hardness or hard-to-cut chip-shaped member on one surface of the elastic member so as to be integrally molded with the sheet-shaped elastic member, and after the laying step And vulcanizing and molding the elastic member and the chip-shaped member that are integrally molded by heating and pressing.

[0009]

In the present invention, one surface of the sheet-like elastic member is opposed to the cable so as to be protected, and the other surface of the elastic member is provided with a chip member having high hardness or hard-to-cut. Is laid. After this laying, the elastic member and the chip-shaped member, which are integrally molded, are heated and pressed to be vulcanized and molded, whereby the cable protection member is manufactured.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention and is an external view of a cable protection member. In FIG. 1, the cable protection member 10 has a fibrous net 12 laid on a neoprene rubber 11 which is an elastic member. Then, on the fibrous net 12, a plurality of chips 13 made of a superalloy or a ceramic are arranged and arranged in a predetermined direction.

This chip 13 is, for example, 10 mm × 10
2 mm, which are laid out in a grid pattern on the fibrous net 12 and are arranged diagonally with respect to the longitudinal direction of the cable protection member 10 as shown in FIG. 2A, for example. They may be arranged vertically and horizontally as shown in (b).

The cable protection member 10 has, for example, a length of 1000 mm in the longitudinal direction, a length of 20 mm in the direction of the short side orthogonal thereto, and a thickness of 4 mm. The cable protection member 10 has flexibility as shown in FIG. 1 (b).

The cable protection member 10 is manufactured as follows. That is, on a synthetic rubber which is a sheet-like elastic member, in this embodiment, on the neoprene rubber 11,
The fibrous net 12 is laid. And this net 1
A plurality of chips 13 made of a superalloy or a ceramic are arranged and mounted in a predetermined direction on the upper surface 2.

With the chip 13 placed, the cable protection member 10 is heated to about 170.degree. At the same time, apply a pressure of about 200 × 10 ⁵ Pa for about 10 minutes,
Vulcanize and mold. In this way, the cable protection member 10 in which the neoprene rubber 11 and the chip 13 are integrally formed is configured.

3 (a) and 3 (b) are sectional views of the cable protection member 10 manufactured in this way. The cable protection member 10 is not initially formed in a half-split shape. Normally, or when it is placed on a plane, as shown in FIG. 3A, the chips 13 formed on the net 12 are spread with no gaps. Then, in the case of being curved along the cable, as shown in FIG. 3B, the neoprene rubber 11 and the net 12 expand and contract as they are, and a gap is formed between the adjacent chips 13 arranged on the net 12. Occurs.

Due to the formation of the gap between the chips,
The cable protection member 10 can be made flexible. FIG. 4 shows a state in which the cable protection member 10 manufactured as described above is inserted along the cable 4 accommodated in the conduit 3 in the waterproof concrete 1.

As shown in the figure, even when the cable 4 is bent or congested, the cable protection member 10 itself has flexibility, so that the conduit 3 smoothly runs along the cable 4. Can be inserted into. Moreover,
Since the surface of the cable protection member 10 is made of a superalloy or ceramic chip, its hardness is 1300 to 1300.
It is as high as 1650. Therefore, with this high-hardness tip, it is possible to obtain high proof stress against picks, drills, sanders, etc. used for cutting work, ring cutting work, and the like. That is, it is possible to reliably prevent the cable from being damaged by a work such as a pick, a drill or a sander.

Since the cable protection member 10 is made of an elastic member such as neoprene rubber 11 on the side facing the cable 4, it is possible to prevent the cable 4 from being damaged during insertion.

In the above-mentioned embodiments, the superalloy or ceramic chips are laid in a grid pattern diagonally or longitudinally with respect to the longitudinal direction, but the invention is not limited to this, and they are arranged in a staggered pattern. It may be one.

[0020]

As described above, according to the present invention, even if the cable is bent and laid, it can be surely inserted into the pipeline, and the cable has a high resistance against picks, drills, sanders and the like. A protective member and a method for manufacturing the same can be provided.

[Brief description of drawings]

1 is an external view of a cable protection member according to an embodiment of the present invention.

2 shows an example of the arrangement of the chips 13 of FIG.
(A) is the figure which showed the example arrange | positioned diagonally with respect to the longitudinal direction of the cable protection member 10, (b) is the figure which showed the example arranged vertically and horizontally with respect to the longitudinal direction of the cable protection member 10. is there.

3A and 3B are cross-sectional views of the cable protection member 10, where FIG. 3A is a view showing a normal state or a state of being placed on a plane, and FIG. 3B is a view showing a state of being curved along the cable.

FIG. 4 shows the cable protection member 10 as the waterproof concrete 1
It is the figure which showed the state inserted along the cable 4 accommodated in the pipe line 3 inside.

FIG. 5 is a diagram illustrating an outline of a case where the waterproof concrete 1 in a conventional manhole is demolished by a drill 2 or the like.

FIG. 6 is a view showing an outer appearance of the half-split plate 5 of FIG.

FIG. 7 is a diagram showing a state of a pick work using a conventional half-split plate 5, a cutting work by a blade of a drill 2, a work of cutting a pipe by a sander 6, and the like.

[Explanation of symbols]

1 ... Waterproof concrete, 2 ... Pick, drill, 3 ... Pipe line, 4 ... Cable, 5 ... Halfway, 6 ... Thunder, 10 ...
Cable protection member, 11 ... Neoprene rubber, 12 ... Fibrous net, 13 ... Chip.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshiaki Ito 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Inventor Hiroki Shikata 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Masanori Seki 4-7-20 Toyo, Koto-ku, Tokyo Inside Doi Manufacturing Co., Ltd.

Claims (9)

[Claims] 1. A sheet-shaped elastic member facing a cable so that one surface is protected, and a high hardness laid on the other surface of the elastic member, which is integrally molded with the elastic member. Alternatively, a cable protection member comprising a chip-shaped member that is difficult to cut. 2. The cable protection member according to claim 1, wherein the elastic member is made of synthetic rubber. 3. The cable protection member according to claim 2, wherein the elastic member is made of neoprene synthetic rubber. 4. The cable protection member according to claim 1, 2 or 3, wherein the material of the tip-shaped member is a super steel alloy or a ceramic. 5. A step of laying a high-hardness or hard-to-cut chip-shaped member on one surface of the elastic member so as to be integrally molded with the sheet-shaped elastic member, and integrally molding after the laying step. And a step of vulcanizing and molding the elastic member and the chip-shaped member which have been subjected to heating and pressurization. 6. The method for manufacturing a cable protection member according to claim 5, wherein in the vulcanization molding step, a pressure of 200 × 10 ⁵ Pa is applied for 10 minutes while heating at 170 ° C. 7. The method for manufacturing a cable protection member according to claim 5, wherein the elastic member is made of synthetic rubber. 8. The method of manufacturing a cable protection member according to claim 7, wherein the elastic member is made of neoprene synthetic rubber. 9. The method for manufacturing a cable protecting member according to claim 5, wherein the material of the tip-shaped member is made of a super steel alloy or ceramic.