JP2000333332A - Cable stringing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable stringing device which enables easy and quick stringing of various types of cables. SOLUTION: The add a new cable L' to an existing cable L installed on a messenger wire W which is strung between poles via a chain coil C, first an end of the cable L' is installed on the coupler 3 of a cable stringing device. Then the end of the cable L' is driven from one pole towards another with a core material 1 at the forefront along the messenger wire W so that the cable L' goes through inside the chain coil C. Since a plurality of elastic bows 2 are flexibly deformed and kept in contact with the chain coil C at this time, the core material 1 is supported on the plurality of the bows 2 and advances substantially in the center of the chain coil C. Furthermore, since the plurality of the bows 2 are displaced in the circumferential direction so as to avoid the messenger wire W and the existing cable L although the messenger wire W and the existing cable L are located inside the chain coil C, these members will not hinder the advance of the core material 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire passing device for inserting various cables such as a communication cable and a power transmission cable into a cable erection hanging device such as a chain coil.
More particularly, the present invention relates to a wire passing device that enables a wire passing operation to be performed easily and quickly.

[0002]

2. Description of the Related Art It has been proposed to use a stretchable chain coil formed of a synthetic resin in a continuous spiral shape as a means for easily laying a communication cable or a power transmission cable.

FIG. 5 shows a state in which a chain coil is erected. As shown in FIG. 5, the chain coil C is attached so as to wind the cable L together with the messenger wire W stretched between telephone poles.
Are suspended from the messenger wire W at regular intervals.

When a cable to be installed is added, a new cable may be inserted inside the spiral of the chain coil and extended along the messenger wire W. In this case, the wiring operation is performed by pushing the distal end of the cable from one power pole side to the other power pole side, into the inside of the chain coil, and gradually advancing along the messenger wire W.

[0005] However, since the cable is flexible and has a bent shape based on being wound on a reel for a long period of time, it is not possible to advance the cable end portion while passing the inside of the chain coil. It is extremely difficult, and in some cases, the tip must protrude from the chain coil and must be pulled back and advanced again into the chain coil. For this reason, a great deal of time and labor was required for cable passing work.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wire passing device which makes it possible to easily and quickly carry out the work of passing through various cables.

[0007]

According to the present invention, there is provided a liner having a plurality of elastically deformable bows arranged around a core material, and both ends of which are connected to the core. It is characterized in that it is attached to the front and rear of the material in the longitudinal direction, respectively, and that a cable can be connected to the rear end of the core material.

According to the liner of the present invention, when various cables are additionally inserted into a cable erection hanging tool such as a chain coil formed in a continuous spiral shape, the cable is connected to the rear end of the core material. By pushing the leading end of the cable inside the cable erection tool with the core material at the top, the plurality of elastically deformable bows are constantly in contact with the cable erection tool while being deformed. The material will be able to advance through the center of the cable erection hanger while avoiding messenger wires and existing cables. Therefore, it is possible to easily and quickly carry out the work of passing various cables.

In the present invention, a fastener for converging at least one location in the length direction of the plurality of bows is provided on the core, and the fastener is fixed to the core while the fastener is fixed to the core. A bow is configured to be slidable with respect to the fastener, or the bow is fixed to the fastener while the fastener is configured to be slidable relative to the core. Is preferred. When the fastener for converging the plurality of bows at at least one location is provided, each bow forms a plurality of arc-shaped bulges in the length direction of the core material.

[0010] Therefore, when the course of the wire is locally narrowed, the forward swelling is reduced while the rear swelling is increased.
The distal end side of the bow can be smoothly advanced while accurately maintaining the position of the core by the pressing force of the rear portion of the bow. When the rear part of the bow passes through a narrow course, the bulge on the rear side is reduced while the bulge on the front side is enlarged. The rear side of the bow can be smoothly advanced while accurately maintaining the position of the material.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 and FIG. 2 show a wiring device according to an embodiment of the present invention. In the figure, W is a messenger wire stretched between utility poles, C is a continuous spiral chain coil installed along the messenger wire W, L is a cable suspended at regular intervals by the chain coil C. It is.

The liner according to this embodiment comprises a rod-shaped or tubular core material 1, a plurality of bows 2 extending along the length direction around the core material 1, and a newly installed cable L '. And a connector 3 for connecting the. The core 1 is made of metal or synthetic resin. The dimensions of the core material 1 are not particularly limited, but need to be longer than at least the helical pitch when the chain coil C is erected. Sockets 1a and 1b for fixing the front and rear ends of the plurality of bows 2 are attached to the front end and the rear end of the core material 1, respectively. The socket 1a on the tip side is formed in a conical shape to facilitate advancement of the wire passing device.

On the other hand, a coupler 3 is mounted near the socket 1b on the rear end side. The coupler 3 has a hollow structure, and the distal end of the cable L ′ inserted into the hollow tube is fastened and fixed with a screw 3a. However, the configuration of the coupler 3 is not particularly limited, and for example, a structure in which the distal end of the cable L ′ is simply locked by a frictional force may be used.

The plurality of bows 2 are made of a linear elastic wire material such as a synthetic resin monofilament or a piano wire, and have reversible flexibility such that when a force is applied from both ends in opposite directions, the bows are deformed into a bow shape. I have. These bows 2 are attached between the sockets 1a and 1b of the core 1 in an elastically curved state,
It protrudes radially from the outer periphery of the core material 1. The number of the bows 2 is preferably 3 to 6. If the number of the bows 2 is less than three, it becomes difficult to position the core 1 at the approximate center of the chain coil C, so that the straightness of the wire passing device is reduced,
On the other hand, if the number exceeds six, the bow 2 becomes overcrowded, so that the resistance at the time of wiring increases, and the wiring work becomes difficult.

Next, a method of using the above-mentioned wire passing device will be described. As shown in FIGS. 1 and 2, when a new cable L ′ is added to a messenger wire W stretched between utility poles via a chain coil C from a state in which a cable L is already installed, first, a connection of a liner is performed. Attach the distal end of the cable L ′ to the container 3. Next, with the core material 1 at the top, the tip of the cable L ′ is pushed from one power pole side to the other power pole side along the messenger wire W so as to pass through the inside of the chain coil C.

At this time, since the plurality of elastic bows 2 are constantly in contact with the chain coil C while being flexibly deformed, the core 1 is supported by the plurality of bows 2 and substantially at the center of the chain coil C. Advance the department. Although the messenger wire W and the existing cable L exist inside the chain coil C, as shown in FIG.
Are displaced in the circumferential direction so as to avoid the messenger wire W and the existing cable L, so that these members do not hinder the advance of the core material 1. Therefore, in the cable erection structure using the chain coil C, a new cable passing operation can be performed easily and quickly.

FIGS. 3 and 4 show a wire connecting device according to another embodiment of the present invention. However, in FIGS. 3 and 4, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description of those portions will be omitted.

In the liner according to this embodiment, a fastener 1 for converging each of the bows 2 is provided substantially at the center of the core 1 in the longitudinal direction.
c is provided. Although this fastener 1c is fixed to the core material 1, each bow 2 is slidable with respect to the fastener 1c. Thus, each bow 2 forms two arc-shaped ridges 2 a and 2 b in the length direction of the core 1.

When a new cable L 'is erected along the existing cable L using the above-described wire passing device, the core 1 is placed first and the distal end of the cable L', similarly to the above-described embodiment. Is pushed along the messenger wire W so as to pass through the inside of the chain coil C, so that the cable passing operation can be performed easily and quickly.

In the present embodiment, in particular, the plurality of bows 2 are slidably restrained with respect to the fastener 1c at substantially the center of the core 1 in the longitudinal direction. Since two arc-shaped protrusions 2a and 2b are formed in the length direction, for example, the diameter of the chain coil C at the time of erection is locally reduced, or depending on the suspension state of the existing cable L, Even in the case where the course is locally narrow, for example, the liner can be smoothly advanced.

That is, when the path of the wire passing device is locally narrowed, the front bulge 2a is reduced while the rear bulge 2b is enlarged. The tip end of the bow 2 can be smoothly advanced while accurately maintaining the position of the core 1 at the center of the chain coil C by the pressing force. Then, bow 2
When the rear part of the vehicle passes through a narrow course, the rear bulge 2b is reduced, while the front bulge 2b is reduced.
Since a becomes larger, the rear side of the bow 2 can be smoothly advanced while accurately maintaining the position of the core 1 with the pressing force of the front side portion of the bow 2. Therefore, according to the present embodiment, it is possible to prevent the passage device from protruding from the chain coil C even when the course of the passage device is bent.

In the above embodiment, the fastener is fixed to the core member, while the bow is slidable with respect to the fastener. In the present invention, the bow is fixed to the fastener. Alternatively, the fastener may be configured to be slidable along the length of the core. In this case, the bow may be integral with the fastener, or may be split on both sides of the fastener.

In the above embodiment, the case where a plurality of bows are converged at one position in the length direction has been described.
In the present invention, these bows may be converged at a plurality of positions in the length direction.

[0025]

As described above, according to the wire passing device of the present invention, a plurality of elastically deformable bows are attached along the length direction around the core material, and the rear end portion of the core material is provided. In the case where various cables are additionally inserted into a cable erection hanging tool such as a chain coil formed in a continuous spiral shape, the connecting work can be easily and quickly performed by being configured so that the cables can be connected. .

[Brief description of the drawings]

FIG. 1 is a side view of a case where a cable is erected using a liner according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a side view of a case where a cable is erected using a liner according to another embodiment of the present invention.

FIG. 4 is a sectional view taken along line YY of FIG. 3;

FIG. 5 is a side view showing a mounted state of a chain coil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core material 1a, 1b Socket 1c Fastener 2 Bow 3 Connector C Chain coil L, L 'Cable W Messenger wire

Claims (3)

[Claims] 1. A plurality of elastically deformable bows are disposed around a core material, and both ends thereof are attached to the front and rear of the core material in the longitudinal direction, respectively, and are attached to the rear end of the core material. A liner configured to connect cables. 2. A fastener for converging at least one portion in a length direction of the plurality of bows is provided on the core, and the fastener is fixed to the core while the bow is fixed. 2. The wire passing device according to claim 1, wherein the wire is slidable with respect to the fastener. 3. A fastener for converging at least one location in the longitudinal direction of the plurality of bows is provided on the core material, and the bow is fixed to the fastener while the fasteners are fixed. 2. The wire passing device according to claim 1, wherein the wire is slidable with respect to the core material.