JP2001352629A - Cable guide head in conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable guide head which can exhibit its pulling performance, even when water stays in a conduit in which communication cables, etc., are laid beforehand. SOLUTION: The head main part of this cable guide head 2 comprises a core 21, which is made of fibers which are not water-absorbing such as polyester cotton, etc., and can maintain a necessary cotton-like swelling even if it is wetted by water, an air receiving hollow bag 22 which contains the core 21, is made from a film or a sheet of non-permeable material and has a required number of air-holes 24 in parts of its circumference and a lattice-shaped outer net bag 23 which surrounds the whole circumference of the hollow bag 22. An end of a cable guide rope 3 is attached to the head main part and a suction negative pressure, and a pushing positive pressure which are generated in a conduit 1 are received by the hollow bag 22 to pull the cable guide rope 3 into the conduit 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire member, such as a cable rope, which is inserted into an existing cable conduit and is attached to the head of the wire member to perform a pulling action. The present invention relates to a head for wiring.

[0002]

2. Description of the Related Art When a wire member such as a wire rope is inserted into an existing cable conduit, a traction tool having a wind receiving action is attached to the head of the wire member to perform wire connection work. Is well known in pipeline construction. In the present invention, the above-described traction tool is referred to as a “line head”.

[0003] In this conventional example, as a head for a wire to be attached to the head of a linear member, for example, Japanese Patent Publication No. 4-53
What is comprised in the para-sheet-like guide member as described in Unexamined-Japanese-Patent No. 598 is common.

[0004] In addition, some existing cable conduits have already introduced a communication cable or the like, and in this conduit, a communication cable, an optical fiber cable, or a pipe for drawing them in (further). A conventional technique of separately passing a rope for passing a wire through the remaining space in a pipeline in order to draw in pods and the like is also disclosed in, for example, JP-A-2-25061.
No. 4 and JP-A-2-250615 are known. In the following description, a member that has already been drawn into the pipe is referred to as a “sheath pipe” for drawing a cable in the present invention.

[0005]

However, in a pipeline in which a "sheath pipe" has already been drawn in, the following problem arises when the filament member is additionally passed through the remaining space in the pipeline. There was a point. First, the remaining space in the pipeline to be routed changes in the cross-sectional shape in the pipeline due to the bending or twisting of the already introduced "sheath pipe". In addition to the problem of difficulty in passing, water may accumulate in the pipeline in the middle of the route, and with a conventional head for passage, water is absorbed during the passage, and There was a serious inconvenience that the situation could not be reached.

[0006] The present invention has been proposed with the intention of solving the above-described problems, and is intended for cases where water has accumulated in a pipeline in which a "sheath pipe" has been previously introduced. Its main purpose is to provide a head for traffic that can exhibit traction performance without hindrance.

[0007]

In order to achieve the above object, a head for wiring according to the present invention is characterized in that it is constructed as follows. In other words, the head for the wire is made of a fiber such as polyester cotton that does not have water absorbency, and a core material that maintains the required cotton-like swelling even when wet with water, and this core material is built in, and a part of the circumference is A head body is formed by a wind receiving hollow bag made of a film or sheet material of a non-permeable material having a required number of air vent holes, and a grid-like outer net bag entirely surrounding the hollow bag,
The distal end of the linear member to be wired is connected to the head body so that the hollow bag receives the wind receiving action of the negative pressure and the positive pressure generated in the pipeline so that the hollow bag advances in the pipeline. It is characterized by comprising.

With the above construction, the air escapes from the air vent hole opened in the hollow bag, so that the outer shape of the head body can be freely deformed. For example, the head body has already been drawn into the pipe. Even when the cross section of the sheath changes due to bending or twisting of the sheath, the head body is freely deformed according to the cross section of the pipeline, ensuring smooth traffic. .

[0009] Further, even if there is a place where water is stored in the conduit, and the head body may pass through the water, the core material contained in the hollow bag is made of a non-water-absorbing polyester. Since the required cotton-like swelling is maintained even when wet with water using fibers such as cotton, the external shape of the head main body is maintained in the required swelling state.

[0010] The water flowing into the hollow bag during passage is
Since the water is drained out of the air vent hole when passing through the pipeline where water does not accumulate, it is not affected by the water that has entered the hollow bag, and a situation in which the vehicle cannot proceed cannot occur.

Even if the hollow bag has a required number of air vent holes, the entire bag is made of a film or sheet made of a non-breathable material, and a non-breathable portion of a required area is secured. , It can sufficiently secure the wind receiving action of positive pressure, and can exhibit the required traction force.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, reference numeral 1 denotes an existing cable conduit buried under a road or the like.
A plurality of sheaths 11 for drawing in a communication cable or the like have already been drawn into the inside of the inside.

In the drawing, reference numeral 2 denotes a head for wiring according to the present invention, and this head 2 is configured as follows. That is, as shown in FIG. 1, the head 2 for a wire includes a core 21 made of a fiber such as polyester cotton, a hollow bag 22 for wind receiving which has a shape incorporating the core 21,
A head main body is formed by a lattice-shaped outer net bag 23 that entirely surrounds the periphery of the hollow bag 22.

The core material 21 is a material that does not have water absorbency, is a material that maintains the required swelling as fluffy even when wet with water, such as cotton or cotton, and is made of fibers such as polyester cotton. Is done.

The hollow bag 22 is a hollow bag in which the core material 21 is incorporated and a required number of air vent holes 24 are opened in a part of the circumference. The entire bag is made of polypropylene having no air permeability. It is made of a plastic film such as polyvinyl chloride or a sheet material. Even if it has an air vent hole 24, a non-venting portion of a required area is secured, and it can withstand suction negative pressure and pressure positive pressure generated in the pipeline 1. It is formed in a parachute shape that receives a required wind receiving action.

The outer net bag 23 entirely surrounds the outer periphery of the hollow bag 22, and is made of a grid-like net material having required square dimensions.

The wire rope 3 is connected to the head body constructed as described above using a string at its end.

According to the wiring head 2 configured as described above, since the air escapes from the air vent hole 24 opened in the hollow bag 22 to the outside, the outer shape of the head main body becomes free to be deformed. Even when the cross section of the pipe 1 has been changed due to the bending or twisting of the sheath 11 already drawn into the inside, the head body is freely deformed according to the cross section of the pipe. , Ensure smooth traffic.

Further, even if there is a place where water is stored in the pipe 1 and the head body may pass through the water, the core material 21 built in the hollow bag 22 has a water absorbing property. Since the required cotton-like swelling is maintained even when wet with water using a fiber such as polyester cotton which does not have a fiber, the external shape of the head body is always maintained in the required "swelling state".

The water that has flowed into the hollow bag 22 during the passage is drained out of the air vent hole 24 when passing through the pipe 1 where water does not accumulate. It will not be affected by the water that has penetrated into the building, and will not be able to proceed.

Even if the hollow bag 22 has a required number of air vent holes 24, the entire bag is made of a film or sheet of a non-permeable material, and a non-vented portion of a required area is secured. Thus, the wind receiving action of the negative pressure and the positive pressure generated in the pipeline 1 can be sufficiently secured, and the required traction force can be exhibited.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a wiring step using a wiring head according to the present invention.

FIG. 2 is a vertical sectional front view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pipe line 11 ... Cable pull-in sheath already drawn in. 2 ... Training head 21 ... Core material 22 ... Wind bag hollow bag 23 ... Outer net bag 24 ... Air vent hole 3 .... Train rope (straight line member) )

Continuing on the front page (72) Inventor Masao Suehiro 3-23-14 Takanawa, Minato-ku, Tokyo Inside Japan COMSYS Corporation (72) Inventor Takayoshi Shimura 3-23-14 Takanawa, Minato-ku, Tokyo Japan COMSYS Within Co., Ltd. (72) Inventor Tsutomu Sato 3-23-14 Takanawa, Minato-ku, Tokyo Within Nippon Comsys Co., Ltd. (72) Nobukatsu Ike 1-10-6 Takaban, Meguro-ku, Tokyo Hakko Corporation (72) Inventor Hiroaki Kaneko 1-10-6 Takaban, Meguro-ku, Tokyo Inside Hako Co., Ltd. (72) Inventor Toshio Nakagawa 1-10-6 Takaban, Meguro-ku, Tokyo Inside Hako Co., Ltd. (72 ) Inventor Junta Sakurai 1-10-6 Takaban, Meguro-ku, Tokyo Inside Hako Co., Ltd. (72) Inventor Takeomi Miura 4-7-120 Toyo, Koto-ku, Tokyo Doi Corporation

Claims (1)

[Claims] 1. A head for a wire which is attached to the head of a wire member and draws the wire member into the pipe by a wind receiving action when a wire member such as a wire rope is inserted into the pipe. The head is made of a fiber such as polyester cotton having no water absorbency, and has a core material that maintains a required cotton-like swelling even when wet with water. A head body is formed by a wind receiving hollow bag made of a film or a sheet material of a non-breathable material having a number of air vent holes, and a grid-like outer net bag entirely surrounding the hollow bag. The head of the wire member to be passed through is connected to the head body, and the hollow bag receives the negative pressure and positive pressure generated in the pipeline and receives the wind receiving action, and travels in the pipeline. A head for wiring in a pipeline.