JP2851090B2 - How to lay an optical cable around an overhead line - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of winding and laying an optical cable having a built-in optical fiber around an overhead line such as an existing overhead ground line, overhead transmission line or overhead distribution line. Things.

(Prior art)

FIG. 5 shows a conventional method of laying and winding an optical cable.
Reference numeral 11 denotes a steel tower, and reference numeral 12 denotes an overhead ground wire provided therebetween. This method uses a traction machine 13 and a winding machine
14 and an optical cable 15
The optical fiber 15 is wound and laid while the winding machine 14 is pulled by the pulling machine 13. When the winding machine 14 travels along the overhead ground wire 12, the drum 16 rotates around the overhead ground wire 12,
Thereby, the optical cable 15 is spirally wound around the overhead ground wire 12.

Note that the winding machine may be pulled by pulling a rope or the like connected to the winding machine on the ground.

In such a laying method, when the winding and laying of one span A is completed and then the winding and laying of the next span B is to be performed, the traction machine 13 and the wrapping machine 14 are displaced from the overhead ground wire 12 on one side of the steel tower 11. It is necessary to change to the overhead ground line 12 on the side. This changeover operation is performed as shown in FIG. 6 (only the winding machine 14 is shown, but the towing machine is similarly performed). First, when the winder 14 arrives near the tower 11, work ladders 17 are placed on both sides of the tower 11.
, And remove the drum 16 from the winding machine 14 and fix it in a place where the work is not hindered. After that, a pole fixed to the tower 11
The winding machine 14 is lifted using the chain block 19 and the overhead ground wire 12 on one side and removed from the overhead ground wire 12 on the other side.
Put on 12.

Next, after the drum 16 is mounted on the winding machine 14, the optical cable 15 is fixed to the steel tower 11 in a fixed manner. This fixing operation is performed as shown in FIG. That is, after covering the optical cable 15 with the protective tube 21 and the protective tube 22 containing the reinforcing wire, the holding metal 23A, the fixing metal 24A, the intermediate supporting metal 25, the fixing metal 24B, Bracket 23B
And attach the optical cable 15 to the overhead ground wire 12 and tower 11
Fixed to. When the fixing operation is completed, the winding machine 14 is started again, and the winding operation for the next span is performed. The procedure described above is performed in order to prevent the optical cable from being excessively short or short at the steel tower.

〔Task〕

In the conventional winding and laying method, every time the winding machine passes through a support such as a steel tower, a relatively time-consuming fixing work of the optical cable is performed, and during this time, the winding machine remains stopped. There is a problem that it takes an extremely long time to finish laying the entire length, and it has been desired to speed up the laying work.

[Means for solving the problem and its operation]

In order to solve the above-described problems, the present invention provides a method of running a winding machine equipped with a drum around which an optical cable is wound along an overhead line and winding and laying the optical cable around the overhead line. After completing the laying of one span and moving to the laying of the next span, pull out the optical cable extra than the length necessary to pass through a support such as a steel tower, and lay the wrap of the next span. After starting,
The operation of storing the extra length portion of the optical cable in the extra length storage case attached to the support or the vicinity thereof is performed.

With this configuration, the winding installation by the winding machine and the operation of fixing the optical cable in the support portion can be performed in parallel, and the time required for the installation work can be greatly reduced.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 show an embodiment of the present invention. This winding laying method is performed as follows. First, when the towing machine 13 and the wrapping machine 14 arrive near the tower 11, as shown in FIG.
A work ladder 17 is placed on both sides of 11 and the winding machine 14
And secure it in a place where it will not interfere with work. At this time, the optical cable 15 is pulled out from the drum 16 more than the length required for passing through the steel tower. Thereafter, the pulling machine 13 and the winding machine 14 are changed from the overhead ground wire 12 on one side of the steel tower 11 to the overhead ground wire 12 on the opposite side using the bar 18 and the chain block 19.

Then, after the drum 16 is mounted on the winding machine 14, the extra length of the optical cable 15 is left as it is, and the traction machine 13 and the winding machine 14 are started on the overhead ground wire 12 of the next span to complete the winding installation. Start. Then, while the winding machine 14 is performing the winding installation, the fixing work of the optical cable 15 on the steel tower 11 is performed. As shown in FIG. 2, the fixing work is performed by covering the optical cable 11 with the protective tube 21 and fixing the metal fittings 24A and 24B.
After fixing the winding end portion and the winding start portion to the overhead ground wire 12, the extra length storage case 26 is fixed to the steel tower 11, and the extra length portion of the optical cable 15 is appropriately sized in the extra length storage case 26. It is performed by storing it in a roll. As the extra storage case 26, for example, a disc-shaped case with a lid may be used.

In the above embodiment, the case where the extra length storage case 26 is attached to the steel tower 11 has been described. However, the extra length storage case 26 can be attached to the overhead ground wire 12 near the iron tower 11, for example, as shown in FIG.

In addition, as shown in FIG.
When wrapping and wrapping around, the extra length storage case 26 can also be attached to the middle part of the jumper wire 28. Figure-4
, 11 is a steel tower, 28 is a tension insulator, 29 is a hanging insulator,
Numeral 30 denotes a retaining clamp.

〔The invention's effect〕

As described above, according to the present invention, when the winding machine finishes the laying of the winding of one span and moves to the laying of the next span, the optical cable has a length necessary to pass through a support such as a steel tower. After pulling out the extra length and starting to lay the next span, remove the extra length of the optical cable,
Since it is stored in the extra length storage case attached to the support or the like, the winding installation by the winding machine and the optical cable fixing work on the support can be performed in parallel, which is necessary for the installation work. There is an advantage that the time can be significantly reduced.

[Brief description of the drawings]

1 and 2 show an embodiment of a winding and laying method according to the present invention, and FIG. 1 is a side view and a view showing a state in which a traction machine and a winding machine are replaced at a steel tower portion. 2 is a side view showing a state after installation, FIGS. 3 and 4 are side views each showing a state after installation according to another embodiment of the present invention, and FIG. 5 shows a conventional winding installation method. Side view, Figure-
FIG. 6 is a side view showing a state when the winding machine is replaced by a conventional method, and FIG. 7 is a side view showing a state after installation by the conventional method. 11: Steel tower, 12: Overhead ground wire, 13: Towing machine 14: Winding machine, 15: Optical cable, 16: Drum 21: Protection tube, 24A / 24B: Fixture 26: Extra length storage case

Claims (1)

(57) [Claims] 1. A method of running a winding machine equipped with a drum around which an optical cable is wound along an overhead wire and winding and laying the optical cable around the overhead wire, wherein the winding machine performs winding and laying of one span. At the end, when moving to the next span of laying, pull out the optical cable more than necessary to pass through a support such as a tower, and after starting the next span of wrapping, A method of wrapping and wrapping an optical cable around an overhead wire, wherein the operation of storing the long portion in the extra length storage case attached to or near the support is performed.