JP2003032822A - Cable laying spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable laying spacer which not only can be easily, rapidly, and surely drawn into a pipe by small drawing-in force and enables laying with excellent work efficiency in addition, but enables insertion and laying without causing partition boards to have a buckling phenomenon even at a bent spot of a pipe, and always keeps a cable inserting space in a specified shape surely. SOLUTION: Strip spacer members 2a, 2b, 2c fitted with a required number of partition boards 4 insertable freely into a pipe 56 for a cable are arranged at specified intervals in series, and the partition boards 4 of the spacer members 2a, 2b, 2c adjoining in front and in rear are united to each other with flexible uniting members 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable laying spacer, and more particularly, to a plurality of communication cables in a cable pipe laid in a joint road or a tunnel road. The present invention relates to a cable laying spacer used for permanent laying.

[0002]

2. Description of the Related Art Conventionally, it has been generally practiced to lay various kinds of pipes having different diameters in advance inside a joint road or tunnel buried underground and use the pipes to lay power lines and communication lines. Has been done. By the way, in the information society of recent years, various types of communication lines have been added so that higher-level communication information can be transmitted and received, and it has been required to install communication cables in excess of the number of pipes conventionally installed. In particular,
An optical cable capable of transmitting a large amount of information has a large transmission amount as compared with a conventional communication cable, and the diameter of the cable has been reduced. When a new cable is inserted into the piping of the communication cable, the cables may cross each other in the piping and adversely affect the characteristics of the optical cable. There is a risk that the cables will interfere with each other and damage the cable coating, and it is extremely difficult in terms of work and the work efficiency is very poor.

As a solution to the conventional problems, a cable laying spacer disclosed in Japanese Utility Model Laid-Open No. 4-131132 is disclosed, which will be described with reference to FIGS. 8 and 9. That is, in the figure, 51 is a cable laying spacer, 52 is a substantially rod-shaped plastic shaft body provided with a wire-loop core material 53 that constitutes the spacer 51, and The body 52 has a length of 200 to 300 m. Reference numeral 54 denotes three partition plates that are radially formed integrally with each other at a predetermined pitch along the longitudinal direction of the shaft body 52. The outer diameter of the partition plate 54 is slightly smaller than the inner diameter of a pipe 56 described later. At the same time, the space 55 for inserting the cable is defined by being inserted into the pipe 56. In addition, reference numeral 56 denotes a cylindrical pipe laid in the common road or tunnel, and 57 denotes a cable for communication.

Then, the spacer 5 constructed as described above.
When laying 1 in the pipe 56, first, an introducing wire (not shown) is inserted into the pipe 56, and the core material 53 of the spacer 51 is connected to the rear end thereof. After a while,
While pulling the lead-in wire from the outlet side of the pipe 56, the spacer 51 is pulled into the pipe 56 so as to be installed, and the partition plate 5
4, the inside of the pipe 56 is divided into three equal parts to form a space 55 for inserting the cable. At this time, piping 5
If there is an existing cable 57 in 6, the required space 55 is held while the existing cable 57 is held.
It is advisable to draw the spacer 51 into the pipe 56 and install it. When the installation of the spacer 51 is completed, a cable 57 is appropriately inserted into another empty space 55 defined by the partition plate 54 of the spacer 51 to newly install it.

[0005]

In the spacer 51 constructed as described above, the interior of the pipe 56 is divided into three equal parts by a partition plate 54 to form a space 55 for inserting a cable. Therefore, the cable 57 can be reliably pulled in and laid without crossing the cables 57. However, since the conventional spacer 51 is integrally formed in a very long shape with a length of 200 to 300 m, a large pulling force is required when the spacer 51 is pulled in and inserted into the pipe 56. When the cable 57 is drawn into a structure such as a building, a very large drawing force is required because the pipe 56 itself is bent, and accordingly, the spacer 51 itself is laid. Was very troublesome, laborious, and extremely inefficient in work. Further, at the place where the pipe 56 is bent, the partition plate 54 causes a buckling phenomenon, and the space 55 for inserting the cable cannot be held in a constant shape.

The present invention is intended to solve the above-mentioned problems of the prior art, and the first purpose thereof is to easily and quickly and surely draw the spacer into the pipe with a small drawing force. Not only can it be installed efficiently, but it can also be installed by inserting it into the partition plate without causing a buckling phenomenon even at the bent part of the pipe, and the cable insertion space can always be held in a fixed shape. It is an object of the present invention to provide a cable laying spacer that can be pressed. A second object of the present invention is to reliably hold the cable at the time of laying in a required space, and to always reliably pull it in without derailing it over the partition plate and into another adjacent space. The present invention aims to provide a cable laying spacer that can be installed. A third object of the present invention is to provide a cable laying spacer which can easily install a new cable on a spacer laid on a pipe with good workability.

[0007]

That is, according to the first aspect of the present invention, a short space spacer member 2a, 2b, 2c with a required number of partition plates 4 that can be inserted into the cable pipe 56 is provided. Are arranged in series at a predetermined interval, and the partition plates 4 of the spacer members 2a, 2b, 2c adjacent to each other in the front and rear are connected by a connecting member 10 having flexibility. The gist of the present invention is a cable laying spacer.

The invention according to claim 2 is characterized in that a curved holding piece 7 is formed at the tip of the partition plate 4 so that it can be brought into contact with the inner peripheral surface of the cable pipe 56. The gist of the present invention is the cable laying spacer of claim 1.

The invention according to claim 3 is characterized in that a temporary fixing portion 8 is formed at the base end portion of the partition plate 4 for temporarily fixing the cable passage cord 11. The gist is the cable laying spacer described in 2.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on an embodiment shown in the drawings. 1 to 5 show an embodiment of the present invention, in which 1 is 200 to 3
A cable laying spacer formed to a length of 00 m,
Reference numeral 2a denotes a required number of short spacer members that constitute the spacer 1, and the spacer members 2a are arranged in series at a predetermined interval. Reference numeral 3 designates a rod-like short plastic shaft body which constitutes the spacer member 2a, and 4 designates a space 5 for inserting the cable into the pipe 56 so as to partition and form the space 5. Three partition plates are integrally formed radially on the outer peripheral surface along the longitudinal direction, 6 is a mounting groove formed in each of the partition plates 4 in the circumferential direction, and 7 is the length of each partition plate 4. Curved holding pieces integrally formed on both side edges along the direction, and the outer diameter dimension of each holding piece 7 is set to be slightly smaller than the inner diameter of the pipe 56. Reference numeral 8 denotes a temporary fixing portion composed of a pair of holding pieces 9 on both sides, which are provided on the middle outer peripheral surface of the shaft body 3 so as to be positioned at an intermediate portion of each partition plate 4, and 10 are adjacent to each other in the front and rear direction via a mounting groove 6. Is a strip-shaped connecting member for connecting the partition plates 4 of the spacer member 2a to each other. The connecting member 10 is made of a flexible plastic material such as polypropylene and has a width of the partition plate 4.
Is formed to have a width slightly smaller than the width. Reference numeral 11 denotes a cable passing cord which is clamped to the temporary fixing portion 8 and can be temporarily fixed. Others are the same as the conventional example, and the same reference numerals indicate the same parts.

Then, the spacer 1 constructed as described above.
When laying the inside of the pipe 56, first, an introducing wire (not shown) is inserted into the pipe 56 in the same manner as in the conventional example, and one end of the connecting member 10 is connected to the rear end of the introducing wire and the spacer. The cable passing-through cord 11 is temporarily fixed to the temporary fixing portion 8 in a sandwiched manner while being arranged along the longitudinal direction of 1. After a while,
While pulling the introduction wire from the outlet side of the pipe 56,
The spacer 1 is pulled in together with the cable passage cord 11 and installed, and the partition plate 4 divides the inside of the pipe 56 into three equal parts to form a space 5 for inserting the cable (see FIG. 4). ). At this time, the spacer 1 has a structure in which a required number of short spacer members 2a arranged in series at a predetermined interval are connected by a connecting member 10, so that the conventional spacer is used. The weight is lighter than that of the pipe 51, and the frictional resistance with the inner peripheral surface of the pipe 56 is small. Further, as shown in FIG. 5, even at a bent portion of the pipe 56, each spacer member 2a is connected by the flexible connecting member 10, so that a buckling phenomenon occurs. It can be smoothly inserted along the bent pipe 56 without any trouble. In addition, Spacer 1
Therefore, when the cables 57 are laid on the respective spaces 5 formed by partitioning the pipes 56, the respective cables 57 are
One end of the cable is connected to the rear end of the cable passage cord 11 which is temporarily fixed to the temporary fixing portion 8 of the spacer 1. After a while,
The leading end of the cable passing cord 11 is pulled from the outlet side of the pipe 56, the cable 57 is pulled in while the cable passing cord 11 is released from the temporary fixing portion 8, and the cable 57 is sequentially installed. At this time, since the holding pieces 7 are formed on both sides of the tip of the partition plate 4 of each spacer member 2a, the case at the time of installation is determined.
The bull 57 and the cable passing cord 11 can be securely held in the required space 5, and there is no risk of getting over the partition plate 4 and derailing in another space 5 adjacent to it. is there. When the installation of the cable 57 is completed, the cable 5 is
Then, the cable passing cord 11 is removed from 7, and the laying work is completed.

In the above embodiment, each spacer member 2a constituting the spacer 1 is provided with three partition plates 4, but the invention is not limited to this, and for example,
A spacer member 2b formed by forming two partition plates 4 as shown in FIG. 6, or four partition plates 4 as shown in FIG.
It is possible to adopt and use a spacer member in which the number of partition plates 4 is increased or decreased as necessary, such as a spacer member 2c formed in the above. At this time, the temporary fixing portion 8 may be formed in accordance with the increase / decrease of the partition plate 4. Further, although the temporary fixing portion 8 is composed of the sandwiching pieces 9 on both sides, the temporary fixing portion 8 is not limited to this, and other known temporary fixing means can be adopted and used.

[0013]

According to the first aspect of the present invention, the short-sized spacer members 2a, 2b, 2c with the required number of partition plates 4 which can be inserted into the cable pipes 56 are as described above. Are arranged in series at predetermined intervals, and the partition plates 4 of the spacer members 2a, 2b, 2c adjacent to each other in the front and rear are connected by a flexible connecting member 10. Even when the pipe 56 is bent, it can be smoothly inserted along the bent pipe 56 without causing a buckling phenomenon, and it can be compared with the conventional integrally formed spacer 51. In addition, it is light in weight, has a small friction resistance with the inner wall of the pipe 56, and can be easily and quickly inserted with a small pulling force, and can be installed with good work efficiency.

According to the second aspect of the present invention, the curved holding piece 7 that can come into contact with the inner peripheral surface of the cable pipe 56 is formed at the tip of the partition plate 4 according to the above. Therefore, the cable 57 and the cable line cord 1 at the time of insertion are inserted.
1 can be securely held in the required space 5, and there is no danger of getting over the partition plate 4 and derailing into another adjacent space 5, and the cable 57 is always present.
Can be securely inserted and laid in the required space 5.

According to the invention described in claim 3, the temporary fixing portion 8 is formed at the base end portion of the partition plate 4 for temporarily fixing the cable passage cord 11 according to the above. The bull passing cord 11 can be temporarily fixed to the spacer 1 in advance and can be inserted into the pipe 56 together with the laying of the spacer 1. For this reason, the cable 5 is inserted into the space 5 for inserting the cable, which is partitioned and formed in the pipe 56 by the spacer 1.
Even when 7 is laid, one end of the cable 57 is connected to the rear end of the cable passing cord 11 and pulled, and the cable passing cord 11 is released from the temporary fixing portion 8. The cable 57 can be drawn and installed, and the cable 57 can always be installed very easily and with good workability.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a front view showing a spacer member 2a of the embodiment.

FIG. 3 is a side view of FIG.

FIG. 4 is a cross-sectional view showing a usage state of the embodiment.

FIG. 5 is a side view showing a usage state in the bent pipe 56 path of the embodiment.

FIG. 6 is a front view showing an embodiment of another spacer member 2b.

FIG. 7 is a front view showing an embodiment of another spacer member 2c.

FIG. 8 is a perspective view showing a conventional example.

FIG. 9 is a cross-sectional view showing a usage state of a conventional example.

[Explanation of symbols]

1 Spacer 2a ・ 2b ・ 2c Spacer member 4 partition boards 5 spaces 7 holding piece 8 Temporary stop 10 Connection member 11 cable line cord 56 piping 57 cables

Claims (3)

[Claims] 1. A short spacer member 2a, 2b, with a required number of partition plates 4 which can be inserted into a cable pipe 56.
The partition plates 4 of the spacer members 2a, 2b, 2c, which are adjacent to each other in the front and rear, are arranged in series at a predetermined interval.
A cable laying spacer, characterized in that they are connected by a flexible connecting member 10. 2. A curved holding piece 7 which is abuttable on the inner peripheral surface of the cable pipe 56 is formed at the front end of the partition plate 4. Cable laying spacer. 3. The cable according to claim 1 or 2, wherein a temporary fixing portion 8 is formed at a base end portion of the partition plate 4 for temporarily fixing the cable passage cord 11. Spacer for installation.