JP2002017013A - Cable stringing method and cable stringing guide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable stringing method and a cable stringing guide which make it possible to perform bundling work of stringing a new cable additionally to an already-strung transmission line without using a bucket car (or long ladder) in a span portion as before, and shorten time. SOLUTION: This is a cable stringing method for stringing a new cable B additionally along with a cable A strung already through the medium of cable hangers A2 along with a suspension wire Al in a span X1, X2. The new cable B is strung over the span X1, X2 by inserting a guide rope 3 in the cable hangers A2 along the already-strung cable A and stringing the guide rope 3 over the span by a wire inserting means, connecting the new cable B to the tip of the guide rope 3, and then winding the guide rope 3 drawing the new cable B out. The wire inserting means is composed of a guide appliance to be fitted on the already-strung cable A, and a wire inserting rod 2 whose tip is united to the guide appliance and end pad is united to the guide rope 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a cable for use in a construction work of a transmission line, and to a guide device for a cable construction.

[0002]

2. Description of the Related Art In general, a transmission line is laid by a construction method in which a suspension line is installed between utility poles (spans) and various cables such as a coaxial cable and an optical cable are suspended on the suspension line using a plurality of cable hangers. ing.

[0003] In recent years, with the increase in the amount of equipment such as transmission lines, bundled work for additionally laying new cables along existing transmission lines has been increasing. Conventionally, the following construction method has been adopted for the unification work.

[0004] Using a bucket truck arranged in the span, attaching a hanger roller into which the guide cable is inserted is attached to the suspension line, and inclining the existing cable hanger obliquely to prevent contact between the existing cable and the guide cable (see FIG. 1). 9)
Is performed while sequentially moving the bucket truck to extend the guide line between the spans. Next, with the newly installed cable connected to the end (or tip) of the cable, the cable and the cable are pulled in by an overhead vehicle, the cable is extended to the span, and then the existing cable is used by using a bucket wheel. By replacing the cable hanger with a newly installed cable hanger and removing the hanger roller while sequentially moving the bucket truck, the new cable is bundled with the existing cables of the span.

[0005] In such a bundle method,
A long ladder may be used instead of a bucket truck.

[0006]

However, according to the above-described bundle method, the bucket wheel (mounting of the hanger roller and the extension of the cable) and the work of attaching the cable (replacement of the cable hanger) and removing the hanger roller are respectively performed by the bucket wheel ( Or a long ladder) is used, so that the work of moving the bucket truck (or long ladder) sequentially between the spans is performed in the process before and after the cable extension work in order to bundle the newly installed cables. It takes a long time to complete the construction.

[0007] Further, in places with heavy traffic, work by a bucket truck or the like is hindered, further delaying the work, and not only disturbing passers-by and traveling vehicles, but also causing danger to workers. There was a problem of becoming.

The present invention has been made in view of such circumstances, and uses a bucket truck (or long ladder) between spans in the entire bundled construction process of attaching a new cable to an existing transmission line. It is an object of the present invention to provide a cable overhead wire construction method capable of reducing the time and shortening the time, and to provide a cable overhead wire guide suitable for use in transmission line overhead work such as unification work.

[0009]

According to a first aspect of the present invention, a method for constructing a cable according to the first aspect of the present invention is to attach a new cable to an existing cable hanger which has been wired via a cable hanger together with a suspension wire between spans. A method of wire-laying a cable with an existing cable along with the existing cable, in which a cable is extended along the existing cable by passing through the inside of the cable hanger by a wire-passing means. After connecting a new cable to the tip of the rope, take out the new cable and wind up the lead cable,
It is characterized in that a new cable is connected in the span.

According to a second aspect of the present invention, the cable connecting method connects the guide member to the existing cable and connects the guide member to a distal end portion.
A guide rod is connected to the existing cable at a terminal end, and a guide tool is fitted into the existing cable, and the guide rod is pushed into a span, and the guide tool slides along an outer peripheral portion of the existing cable. By moving the power cable from one power pole to the other power pole side, the guide rope is extended to a span.

According to a third aspect of the present invention, there is provided a guide device for a cable overhead wire which is moved along an existing cable which has been wired via a cable hanger together with a suspension wire between the spans. The tool is detachably fitted into the existing cable through a groove, and is slidable along the outer peripheral portion of the existing cable in the fitted state, and extends from the base end to the distal end of the existing cable. The base end is provided with a connecting portion to which a wire rod for moving the guide tool along the existing cable is detachably attached.

[0012]

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

According to the method of constructing a cable according to the present invention, for example, as shown in FIG. 3, a new cable B is added to an existing cable A that has been wired using a cable hanger A2 together with a suspension line A1 between spans. It is a construction method for the overhead line.

Here, before describing the cable wire construction method, first, a cable overhead wire guide device (hereinafter, simply referred to as a guide device) 1, a wire rod 2, and a lead wire used as main members in the method. 3 will be described.

As shown in FIG. 4, the guide member 1 is formed so that a groove 13 is formed in a spiral shape from the base end portion 11 to the distal end portion 12, and is detachably fitted into the existing cable A through the groove 13. Have been.

The guide member 1 is tapered from the base end portion 11 to the tip end portion 12 so that it can move smoothly along the existing cable A while inserting a cable hanger A2 in a cable wire laying method described later. Has been made. In addition, since the guide member 1 is made of a material that is fitted into the existing cable A and moved, the cable A
What can be moved smoothly without damaging is used, for example, is made of polyacetal or the like.

The wire rod 2 is for moving the guide 1 fitted into the existing cable A from one power pole X1 to the other power pole X2 as shown in FIG. The guide member 1 can be connected to the base end portion 11 by appropriate connecting means.

As the connecting means, for example, FIG.
As shown in FIG. 1, a screw portion 14 as a connecting portion is protruded from the base end portion 11 of the guide device 1. A nut portion 21 provided at the distal end of the communication rod 2 is screwed into the screw portion 14. As shown in FIG. 5B, the two are detachably connected to each other. In addition, the said connection means is an example, and you may employ | adopt another connection means.

The wire rod 2 is made of a material having excellent rigidity and high directivity, and made of a material that can be wound up and stored on a reel 4 as shown in FIG.
For example, those made of FRP are used.

The guiding rope 3 is a rope made of, for example, a low friction material in order to reduce the contact resistance with the existing cable or the existing cable hanger, and is connected to the terminal end of the wire rod 2 by an appropriate connecting means. And the connecting rod 2
The wire is extended through the span.

As the connection means, for example, a connection fitting 5 as shown in FIG. 7 is used. Specifically, FIG.
As shown in (a), a screw portion 51 is protruded from one end of the connection fitting 5, and a U-shaped connection member 5 is attached to the other end 52.
3 is detachably provided by a bolt 54, and the screw portion 51 is provided.
The nut 22 provided at the end of the wire rod 2 is screwed into the connecting rod 53, and the connecting member 53 is inserted through the annular portion 31 provided at the end of the guide rope 3 to connect the connecting member 53 to the bolt 5.
By connecting to the other end 52 by 4, FIG.
As shown in (1), the wire rod 2 and the guide rope 3 are connected via the connection fitting 5.

After the two parts are connected, a portion extending from the end of the wire rod 2 to the other end 52 of the connection fitting 5 is protected by a protective cover (prevention cover) 55 as shown in FIG.
To cover.

Next, a method of wiring a cable according to the present invention using the guide member 1 and the wire rod 2 will be described mainly with reference to FIGS.

First, as shown in FIG. 1, a wire rod 2 and a conductor 3 are provided near one power pole X1, and a new cable B is provided near the other power pole X2. In addition, a wheel is installed on these utility poles X1 and X2 as needed.

Subsequently, the operator connects the distal end of the wire rod 2 to the base end of the guide tool 1 on one of the electric poles X1, and fits the guide tool 1 into the existing cable A. As shown in FIG. 8 (a), the guide member 1 is first fitted in such a manner that the guide member 1 is inclined downward at the distal end with respect to the cable A, and the central portion 13a of the groove 13 is connected to the cable A. Fit into A. Then, in this state, by rotating the entire guide member 1 as shown in FIG. 8B, the guide member 1 is arranged on the cable A as shown in FIG. 8C.

In this state, the connecting rod 2 is connected to one utility pole X
The guide tool 1 is gradually pushed in from the first side in such a manner that the guide tool 1 is pushed out to the span. As a result, the guide member 1 slides on the outer periphery of the cable A and moves toward the utility pole X2 while penetrating the cable hanger A2. Accordingly, the wire rod 2 also passes through the cable hanger A2 while penetrating the cable hanger A2. Is extended along.

When the guide member 1 reaches the electric pole X2, the operator removes the guide member 1 from the cable A at the electric pole X2 and at the same time, passes the guide member 1 through the passing rod 2
The wire rod 2 extended between the spans is pulled out toward the utility pole X2 and collected. At this time, the leading end of the guiding rope 3 is connected to the end of the wire rod 2 and
By collecting the wire rod 2 at 2, the guiding rope 3 is extended to the span while being inserted into the cable hanger A2.

When the guiding rope 3 is extended in the span as described above, next, on the electric wire X2 side, a new cable B is fed out from the feeding drum 6 disposed near the wire X2, and the end of the cable B is pulled out. It is connected to the tip of the cable 3.

Then, as shown in FIG.
By winding the guide rope 3 at a predetermined speed on the winding drum 7 disposed on one side, the cable B is fed out with the back tension applied from the feeding drum 6.

As a result, the cable B is extended along the cable A in the span while being inserted through the cable hanger A2, and is held together with the cable A in a bundled state by the cable hanger A2.

Thereafter, by removing the used members, the work of connecting the cable B to the span is completed.

According to the above-described method of wiring a cable according to the present invention, a new cable B can be added to the existing cable A only by the work of the utility poles X1 and X2 by the operator. As a result, the work at a high place by the bucket truck between the spans becomes unnecessary, and the time required for the overhead wire work can be significantly reduced, and the work can be performed in a safe environment.

In the present embodiment, the case where a new cable B is laid along with the existing cable A for one span has been described. However, the method of laying a cable according to the present invention is as follows.
In addition to this, it is possible to wire the wire to two or more continuous spans while passing the telephone pole in the middle. In this case, it is necessary to provide various rollers according to the existing wiring conditions of the cable A or the like at the middle of the telephone pole so that the wire rod 2, the guiding rope 3 and the cable B can pass through the telephone pole smoothly. There is.

In addition, the description has been given of a case where a new cable B is connected to one existing cable A to bundle two cables, but the present invention is not limited to this. Alternatively, three cables may be bundled by bridging a simple cable. Although the number of existing cables does not matter as described above, it goes without saying that the cable laying method of the present invention is based on the premise that the cable hanger A2 has enough space to wire a new cable. No.

[0035]

As described above, according to the method of wiring a cable according to the present invention, a new cable can be added to an existing cable only by a worker working on a utility pole.
This eliminates the need for work at high places by a bucket truck between spans, greatly reducing the time required for overhead wire work, and performing work in a safe environment.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic explanatory view for explaining an overhead wire construction method for a cable according to the present invention.

FIG. 2 is a schematic explanatory view for explaining a cable overhead wire method according to the present invention.

FIG. 3 is a perspective view showing a cable spanned between spans.

FIG. 4 is a side view showing a guide tool.

FIG. 5 is a view showing a specific example of a connecting means for connecting the guide member and the wire rod.

FIG. 6 is a side view showing a reel for storing a wire rod;

FIG. 7 is a view showing a specific example of a connecting means for connecting the communication rod and the guide rope.

FIG. 8 is a diagram showing a method of fitting a guide tool into an existing cable.

FIG. 9 is a perspective view showing a conventional cable bundling method.

[Explanation of symbols]

 Reference Signs List A Cable A1 Suspension line A2 Cable hanger 1 Guide tool (guide tool for cable overhead wire) 13 Groove 14 Screw part (connecting part) 2 Connecting rod 3 Lead cable

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuya Nakahira 3-3-22 Nakanoshima, Kita-ku, Osaka City Inside Kansai Electric Power Company (72) Inventor Hidenori Akehashi 2-3-1 Honjo Higashi, Kita-ku, Osaka-shi No. Kindennai F-term (Reference) 5G367 GA03 GB01 GC02

Claims (3)

[Claims] 1. A method of wiring a cable in which a new cable is laid along with the existing cable by being laid inside an existing cable hanger of an existing cable that has been laid via a cable hanger together with a suspension line between the spans. Extending a lead line between the spans by a wire passing means while passing through the inside of the cable hanger along the existing cable,
After connecting a new cable to the tip of the guide cable, the new cable is wound up while feeding out the new cable, and the new cable is connected to the span. 2. The wiring means comprises a guide tool fitted into the existing cable, and a wire rod connecting the guide tool to a distal end and connecting the lead to a terminal end. The guide member is inserted into the cable, the wire rod is pushed into the span, and the guide member is slid along the outer peripheral portion of the existing cable to move from one power pole to the other power pole side. 2. The method according to claim 1, wherein the rope is extended between the spans. 3. A guide device for a cable overhead wire that is moved along an existing cable that is wired via a cable hanger together with a suspension wire between spans, wherein the guide device is detachable from the existing cable through a groove. In the fitted state, the cable is slidable along the outer peripheral portion of the existing cable, and is formed to be tapered from the base end to the distal end of the existing cable. A guide member for a cable overhead wire, wherein a connecting portion for detachably connecting a wire rod for moving the guide member along an existing cable is provided.