JP2860365B2 - A method of supporting an optical cable on a hanging wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supporting an optical cable on a suspension wire provided between utility poles.

[0002]

2. Description of the Related Art Conventionally, as means for supporting an optical cable on a suspension wire laid between utility poles, a loop-shaped support bracket is hung on the suspension wire, and the optical cable is inserted through the loop-shaped bracket and held. I was letting it.

[0003]

However, in such a conventional means, since the supporting brackets must be sequentially attached at a predetermined pitch over the entire length of the suspending wire, the suspending bracket between the utility poles is required. Working on wires required scaffolding such as cable-type gondola, hoist, and ladder truck. In particular, work with a gondola that is suspended by moving wires is dangerous and workability is poor, and the use of a hoist or ladder car requires equipment and manpower, which increases costs and hinders traffic. There is a point.

Accordingly, the present invention provides a novel construction method capable of successively supporting an optical cable on a suspension wire while using a telephone pole as a scaffold and in a fixed place without using the gondola or the hoist described above. The first purpose.

[0005]

[0006]

In order to achieve the above object, the present invention takes the following technical measures. That is, in the method for achieving the object of the present invention, the metal wire 1
a is covered with a synthetic resin film 1b to form a spiral wire 1 by spirally twisting a wire of a predetermined length that has a shape-retaining hardness, and the wires are connected to one end of the spiral wire 1. The spiral wire 1 and the optical cable 3 are moved forward with the hanging wire 4 installed between the utility poles and the optical cable 3 to be installed being inserted into the spiral inner part of the spiral wire 1. The spiral wire 1 is sent out, and the next spiral wire is sequentially connected to one end of the spiral wire 1 on the hand side via the joint pipe 2 to support the optical cable 3.

[0007]

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the accompanying drawings. In the drawings, reference symbol A denotes a brace used in the method according to the present invention, and is a predetermined length in which a metal wire 1a such as a steel wire is covered with a synthetic resin film 1b to maintain a form-retaining hardness. And a joint pipe 2 attached to one end of the spiral wire 1 to connect the wires to each other.

The spiral wire 1 is formed in an elliptical cross section, and its flat surface is formed toward the inner surface of the spiral. Further, in this embodiment, the joint pipe 2 is formed of a compressible deformable metal material such as an aluminum material, and is connected to one end of the spiral wire 1 via a crimping means except for a connection hole 2a. Reference numeral 1b in FIG. 2 indicates the crimping portion. The inner edge of the opening of the connection hole 2a of the joint pipe 2 is chamfered so that one end of the spiral wire to be connected can be easily inserted. still,
The spiral wire 1 is formed with a length of 80 to 150 cm, and is selected according to the diameter of the optical cable 3 to be erected, that is, its weight and the environment of the work site.

[0010] In the method according to the present invention, the worker climbs on the telephone pole to ensure his / her body safety, and
As shown in the figure, the suspension wire 4 laid between the electric poles and the optical cable 3 to be laid are inserted through the spiral inner portion of the spiral wire 1 and the spiral wire 1 is sent out together with the optical cable 3 to the front side. The next spiral wire is connected to one end of the spiral wire 1 in the above-mentioned manner by means of crimping or the like via the joint pipe 2, and this is repeatedly sent out forward. The optical cable 3 is supported over the entire length of the lowering wire 4. in this case,
In this embodiment, since the spiral wire 1 is formed in an oval cross section and its flat surface is formed toward the inner surface of the spiral, the suspension wire 4 and the optical cable 3 and the spiral wire 1 are in surface contact. The optical cable 3 can be stably supported by the contact. In addition, the optical cable 3
It is preferable that the joint pipe 2 is arranged so as to be positioned above the suspending wire 4 as shown in FIG.

In the present invention, the connection between the joint pipe 2 and the optical cable 3 is not necessarily limited to crimping means. For example, the joint pipe 2 may be formed of a material having elasticity and connected by press-fitting the spiral wire 1.

Although the representative embodiment of the present invention has been described above, the present invention is not necessarily limited to the above-described embodiment structure, but may be appropriately modified within a range that has the constituent requirements and has an effect. Of course, it can be implemented.

[0013]

Since the present invention is constructed as described above, it is possible to support an optical cable alone on a suspension wire without using a gondola or a hoist, while using a telephone pole as a scaffold in a certain place. As a result, equipment and manpower can be omitted, and the construction cost for installing the optical cable can be significantly reduced. If a joint pipe for connection is attached to the spiral wire in advance, there is an effect that the management and carrying of the brace are facilitated and the working efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a construction method according to the present invention.

FIG. 2 is an enlarged partial cross-sectional side view showing a part of the brace used in the present invention.

FIG. 3 is a sectional view taken along the line BB in FIG. 2;

FIG. 4 is a partial cross-sectional side view showing a state where spiral wires are joined to each other.

FIG. 5 is a sectional view of only a joint pipe according to the present invention.

FIG. 6 is a front view of the joint pipe.

FIG. 7 is a side view showing a state where the optical cable is suspended.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spiral wire 1a Metal wire 1b Synthetic resin film 2 Joint pipe 3 Optical cable 4 Hanging wire

Claims (1)

(57) [Claims] 1. A spiral wire 1 is formed by spirally twisting a wire of a predetermined length having a shape-retaining hardness by covering a metal wire 1a with a synthetic resin film 1b, and forming one end of the spiral wire 1. A joint pipe 2 for connecting the wires to each other is attached to the spiral wire 1. A spiral wire 1 and a suspending wire 4 and an optical cable 3 to be installed are inserted between spiral poles of the spiral wire 1. 1 is forwarded together with the optical cable 3, and the next spiral wire is connected to one end of the spiral wire 1 near the hand by the joint pipe 2.
A method of supporting the optical cable by suspending wires, wherein the optical cable is supported by sequentially connecting the optical cable 3 through the cable.