JP2002027624A - Cutting/dividing method for covered overhead wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting/dividing method for a covered overhead wire which can surely prevent the covered wire, etc., from falling, while a stripping work of the parts of the covered wire which are gripped by wire gripping devices is eliminated. SOLUTION: Covered parts 10 of two positions of a covered overhead wire 9 are gripped by a pair of wire-gripping devices 12a and 12b. Both the wire- gripping devices 12a and 12b are connected to each other in a tightened state, by using an expander 13 provided between both the wire gripping devices 12a and 12b, while the covered wire 9 is in a loosened state and the covered wire 9 is cut at a position in the loosened part and the covered parts 10 and 10 of both the cut ends are stripped. Conductors 11a and 11b, exposed by the stripping, are gripped respectively by chucks 1a and 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for separating a coated overhead wire such as a coated electric wire.

[0002]

2. Description of the Related Art In the process of separating a covered overhead wire, two portions of the covered overhead wire are gripped by grippers fixed to both ends of a telescopic rod-shaped telescopic device, and then the telescopic device is contracted by both grippers. The distance between the wire devices is shortened to loosen the coated overhead wire, and then the coated overhead wire is cut at the slackened portion, both cut ends are separated, and the coating portion is peeled.

[0003]

At present, generally used insulated wires (covered overhead wires) have a form in which a core wire made of a copper stranded wire is covered with a covering portion made of plastic or the like. The degree of adhesion to the coating is not very strong. Therefore, a pair of grippers grip the covering portions of both cut ends of the coated overhead wire after cutting, and connect the two cut ends by these grippers and telescopic devices, and leave them for a long time. In such a case, if a large external force is applied to the coated overhead wire for some reason, the part of the coated part gripped by the gripper will be pulled by a large force, and will come off the core wire in a state where it will be cut off from the other coated part. Then, the connection of both cut ends is released,
There was a risk that the coated overhead wire, the gripper, and the telescopic device would fall.

[0004] In order to prevent the above-mentioned accidents, it is a common practice to peel the covering portion of the portion to be gripped by the gripper and directly grip the core wire of the coated overhead wire by the gripper. Is being done. However, in this case, it is necessary to measure the dimensions of the portion to be gripped by the coated overhead wire, and to peel off only the necessary portion, so that there is a problem that a large amount of labor and time are required for the operation. In addition, after the construction is completed, it is necessary to repair the stripped part.

[0005] In view of the above, the present invention eliminates the necessity of stripping the portion gripped by the coated overhead wire gripper, and even if a large external force acts on the coated overhead wire after cutting,
It is an object of the present invention to provide a method for separating a coated overhead wire that can prevent the falling of the coated overhead wire and the like by grasping the connection between both cut ends of the coated overhead wire even if the coating portion is cut off. .

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, a method for separating a coated overhead wire according to the present invention comprises gripping two locations of the coated overhead wire at a covering portion thereof with a pair of grippers, Using a telescopic device or a retractor arranged in the middle of the vessel, connect both grippers in a tensioned state with the covered overhead wire loosened, cut the covered overhead wire at the loosened location, and cut both It is characterized in that each of the emerging core wires is gripped by a chuck by peeling off the covering portion at the end.

According to the present invention, the covering portions at both cut ends of the cut overhead wire after cutting are gripped by a pair of grippers, and both cut ends are connected by these grippers and the like and left for a long time. In such a case, even if a large external force acts on the coated overhead wire for some reason and the gripped part of the coated part may be torn off from other coated parts, the gripped part Movement is prevented by the chuck directly fixed to the core wire, so that the shredded covering portion can be prevented from falling off the core wire, and the connection of both cut ends by a gripper or the like is maintained. . Therefore, it is possible to prevent a fall accident such as a covered overhead wire, a gripper, and the like, which is seen in the conventional example.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

In the work of separating the covered overhead wire (covered electric wire), first, at two places of the covered overhead wire 9 stretched between electric poles or the like, the covering portion 10 is grasped by a pair of graspers 12a and 12b. Started from. Both gripping devices 12a, 12b are connected to a rod-shaped extender / contractor 13 via chains 15a, 15b. The turnbuckle type expander / contractor 13 contracts by giving rotation about its axis, draws both grippers 12a and 12b, and reduces the distance between them, thereby relaxing the covered overhead wire 9. Both outer portions 9a and 9b of the grippers 12a and 12b of the covered overhead wire 9 are mechanically connected by the grippers 12a and 12b and the telescopic device 13 while a large tensile force is applied. Grabber 1
The tension from the coated overhead wire and the telescopic device 13 acts on 2a and 12b.
2b is configured to increase the gripping force.

Next, the two grippers 12 connected in a tension state are connected.
a, in the center of the slack portion located inside 12b,
The coated overhead wire 9 is cut. Thereafter, as shown in FIG. 1, one of the pair of holders 16 a and 16 b attached to the vicinity of both ends of the expander 13 and holding the coated overhead wire is rotated by 180 ° around the axis of the expander 13. ,
The two cut ends 17a and 17b of the coated overhead wire 9 are separated.

Next, the covering portion 10 is peeled at both cut ends of the covering overhead wire 9, and the emerging core wires 11a and 11b are gripped by the chucks 1a and 1b, respectively. Chuck 1
a and 1b are, as an example, as shown in FIGS. 2 and 3, a main body 3 having a fixed gripper 2, a movable gripper 4 slidably held by the main body 3, and a main body 3. And a screw shaft 5 that is screwed together and rotatably connected to the movable gripper 4 and is integrally moved in the axial direction. The core wires 11a and 11b are arranged between the fixed gripper 2 and the movable gripper 4 of the core wires 11a and 11b, and the screw shaft 5 is rotated to advance the core wires 11a and 11b.
Can be firmly gripped between the fixed gripper 2 and the movable gripper 4. Various chucks such as those having a wedge-type movable gripper can be used as the chucks 1a and 1b.

The chucks 1a and 1b are connected to the core wires 11a and 1b, respectively.
As shown in FIG. 1, the position where the chuck 1 a is held by the side surfaces of the chucks 1 a and 1 b is preferable as the position where the chuck 1 a is gripped.

As described above, the work of separating the coated overhead wire is performed, and may be left for a long time in a state as shown in FIG. 1, as described in (Means for Solving the Problems). As described above, by the operation of the chucks 1a and 1b directly fixed to the core wires 11a and 11b, the covering portion 10 causes the core wires 11a and 11b to move.
11b can be reliably prevented from falling out.

After that, by repairing the coated overhead wire 10, both cut ends are connected, and an insulating coating is applied to the connection.

As another method of shortening the distance between the two grippers to loosen the covered overhead wire and connecting the two grippers in a tensioned state, the two grippers are pulled by using a tensioner. There is a method of maintaining that state with a stopper.

[0016]

According to the present invention, it is possible to reliably prevent falling of a covered overhead wire or the like while eliminating the need for stripping work of a portion gripped by the covered overhead wire gripper. A method can be provided.

[Brief description of the drawings]

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

FIG. 2 is a front view showing an example of a chuck.

FIG. 3 is a side view showing one example of a chuck.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chuck 9 Coated overhead wire 10 Coated part 11a, 11b Core wire 12a, 12b Gripping device 13 Telescopic device

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference)

Claims (1)

[Claims] 1. A covered overhead wire is gripped at two locations by a pair of grippers at its covering portion, and the covered overhead wire is slackened by using an extender or a retractor disposed between the two grippers. In this state, both grippers are connected in a tensioned state, the covered overhead wire is cut at the slackened point, and the cores appearing by peeling the covering portions at both cut ends are gripped by the chuck. A method for separating a coated overhead wire, characterized in that: