JPH09191518A - Protective cover for distribution line construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a protective cover by which a mounting operation to, and a removal operation from, a charging part or the like can be performed by using a hot stick although a flexible insulating sheet is used. SOLUTION: An insulating sheet 12 is laid, in a gently turned-up shape, along the inside part of gripping and holding parts 14a at a pair of scissors 14 for sheet fixation, and it is fixed by sheet fixation parts 17. When a protective cover 11 is attached to an object, to be attached, such as a charging part or the like by using a hot stick, opening and shutting operation parts 14b at the pair of scissors 14 for sheet fixation are gripped so as to be brought close to the object to be attached, and the protective cover is attached to the object in such a way that the object is covered with the insulating sheet 12. Since the insulating sheet 12 and the pair of scissors 14 for sheet fixation are integrated, a mounting operation and a removal operation can be performed by using the hot stick. Since the insulating sheet 12 is used, the protective cover can be used in common for various shapes of objects.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective cover for distribution line construction, which is used by being attached to a high-voltage charging section (electric wire or the like) or a grounding section (arms or the like) during live line construction work on an overhead distribution line.

[0002]

2. Description of the Related Art When performing live work on an overhead distribution line, a protective cover is usually placed on the high-voltage charging section and the ground section. When this protective cover is attached by hand, a flexible and flexible insulating sheet is manually wrapped around an object such as a charging part or a grounding part, and this is wrapped with a rubber cord to stop it. . On the other hand, the work of indirect hot-line construction using a hot stick is safer than manual work, but in this case, the operation of a soft and flexible insulating sheet with a hot stick is not possible. Since it is difficult, the above insulating sheet cannot be used as a protective cover.

Therefore, conventionally, as a protective cover for distribution line construction using a hot stick, as shown in FIG. 5, an insulating resin molded product having a shape corresponding to a member to be attached has been used. In the illustrated example, the distribution line 1 has a tubular protective cover 2 that has an overlapping portion on one side and that can be opened and closed.
Protective covers 4 and 5 each having a substantially U-shaped cross-section that match the shape of the arm 3 are attached to the arm 3. Also,
An eye ring 6 is attached to each of the protective covers 2, 4, and 5. When attaching / removing the protective covers 2, 4, 5, the hook tool attached to the tip of the hot stick is attached to the eye ring 6. I hang it up and work.

[0004]

In the work of distribution line work using the above-mentioned hot stick, a dedicated tool is attached to the tip of the hot stick, which is an insulating rod, and various work work of the distribution line is performed by the dedicated tool. Method,
Since the worker can work away from the high-voltage charging part by the length of the hot stick, the worker can be prevented from electric shock and the work can be performed safely. Then, the protection covers 2, 4, and 5 are attached by this hot stick operation.
Although the workability of removing is good, the shape of the protective covers 2, 4 and 5 is different depending on the object to be attached because the protective covers 2, 4 and 5 are resin molded products. Therefore, many types of protective covers are required. Therefore, there is a problem in operability. Further, since the protective covers 2, 4, 5 are molded products, there is a problem that a large space is required for storing them.

The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and enables attachment / detachment work with a hot stick while using an insulating sheet as a protective cover. It is an object of the present invention to provide a protective cover that does not need to have a large number and does not require a large space for storing and transporting the protective cover.

[0006]

A protective cover of the present invention for solving the above-mentioned problems includes a flexible insulating sheet, and a sheet fixing scissors having a gripping portion for sandwiching the insulating sheet in a gently folded shape. And a sheet stopper plate for stopping the vicinity of both edges of the folded-back insulating sheet along the inner surface of the grip portion of the sheet fixing scissors, respectively.

[0007]

FIG. 1 is a block diagram showing an embodiment of the present invention.
~ It demonstrates with reference to the Example of FIG. FIG. 1 is a front view of a protective cover (hereinafter simply referred to as a protective cover) 11 for distribution line construction according to an embodiment of the present invention, and FIG. 2 is a side view. As shown in the figure, the protective cover 11 uses a flexible and flexible rectangular insulating sheet 12 as a protective cover body, and is equipped with sheet fixing scissors 14 for fixing the insulating sheet 12. At both edges of the insulating sheet 12,
End reinforcing rods 17 are attached to reinforce the flexible edges so as not to wobble. Illustrated end reinforcement rod 1
Reference numeral 7 denotes a structure in which both edges of the insulating sheet 12 are fitted and sandwiched by slits provided in the pipe. This sheet fixing scissors 14
Has a gripping portion 14a having a concavely curved inner surface that sandwiches the insulating sheet 12 in a gently folded shape, and an opening / closing operation portion 14b having a torsion spring 15. The vicinity of both edges of the folded back insulating sheet 12 is stopped along the inner surface of the grip portion 14a of the sheet fixing scissors 14 by the sheet stopper plate 16, respectively. The lower end portion of the seat stop plate 16 is bent into a substantially U-shape, and the substantially U-shaped portion 16 a is provided at the grip portion 14 of the seat fixing scissors 14.
It is fitted to the tip of a and attached to the sheet fixing scissors 14.

[0008] In the overhead power distribution line, when performing the work of indirect live-wiring using a hot stick, the protective cover 11 is covered on an object to be attached such as a power distribution line or a braid. In this case, the open / close operation unit 14b of the sheet fixing scissors 14 is grasped by a hot stick (not shown) and brought close to the object to be attached, the open / close operation unit 14b is narrowed to open the grip 14a, and the insulating sheet 12 is used to move the object. Sandwich, open / close operation unit 14b
When is opened, the gripping portion 14a is closed by the reaction force of the torsion spring 15, and the insulating sheet 12 is fixed to the object while covering the object. This functions as a protective cover and ensures worker safety. Although the description of removing the protective cover 11 is omitted, it can be easily removed from the object by using a hot stick as well.

In the above-described work of attaching / removing the protective cover 11, the insulating sheet 12 and the sheet fixing scissors 14 are integrated by the sheet stopper plate 16, so that the flexible insulating sheet 12 is used as the protective cover main body portion. While using, attach with the above-mentioned hot stick
The removal work can be easily performed. In addition, since both edges of the insulating sheet 12 have rigidity and do not sway due to the presence of the end reinforcing rods 17, there is no possibility that the edges of the insulating sheet 12 are caught inside when the insulating sheet 12 is covered with an object. ， Smooth operation is possible.

Insulating sheet 12 of protective cover 11 described above
Requires a periodic inspection (withstand voltage test), and at that time the insulating sheet 12 needs to be removed from the sheet fixing scissors 14, but the insulating sheet 12 is pressed and fixed to the sheet fixing scissors 14 by the sheet stop plate 16. Therefore, it is easy to attach and detach the insulating sheet 12 at the time of regular inspection.

When the protective cover 11 is attached to a small electric wire or the like, as shown in FIGS. 3 and 4, a two-folded small object gripping adapter 20 made of an elastic material is used to grip the sheet fixing scissors 14 with the gripping portion 14a. It is good to use by mounting it inside. As shown by the chain double-dashed lines in FIGS.
Even if the inner space of the grip portion 14a is too large with respect to its diameter, it can be gripped by the elastic small object grip adapter 20.

The insulating sheet is usually suitable to have a rectangular shape, but it may be considered to have a non-rectangular shape depending on an object to be attached. Further, the structure of the scissors for fixing the seat is not limited to the illustrated example. In short, it is sufficient if it has a gripping portion that can be opened and closed, and that the gripping portion can sandwich the insulating sheet in a gently folded manner. Also, the sheet stopper plate is not limited to the example shown in the figure, and any sheet can be used as long as the insulating sheet can be detachably attached to the inner surface of the grip portion of the sheet fixing scissors.

[0013]

According to the protective cover for distribution line construction of the present invention, since the insulating sheet and the scissors for fixing the sheet are integrated, the hot stick is used while the flexible insulating sheet is used as the protective cover main body. It is possible to easily attach and remove by using. Therefore, it can be shared regardless of the shape of the attachment target, and it is not necessary to have many types of protective covers.

Further, since the main part for insulation is not a molded product but a flexible insulating sheet, it does not become bulky during storage and transportation of the protective cover, and does not require a large space. Also, to attach the insulation sheet to the sheet fixing scissors,
Since it can be easily done by operating the sheet stop plate, it is easy to remove the insulating sheet during the withstand voltage test of the insulating sheet.

According to the second aspect, since both edges of the insulating sheet have rigidity and do not sway due to the presence of the end reinforcing rods, when the insulating sheet is covered with the object, the edges of the insulating sheet are wound inside. Smooth operation is possible without the risk of damage.

According to the third aspect, by attaching the gripping adapter for a small object, it becomes easy to attach the thin object to an electric wire or the like.

[Brief description of the drawings]

FIG. 1 is a front view of a protective cover for distribution line construction according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a front view of a protective cover for distribution line construction according to another embodiment of the present invention.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a perspective view of a conventional protective cover for distribution line construction, showing the vicinity of a wire arm of a utility pole.

[Explanation of symbols]

 11 Protective Cover 12 Insulating Sheet 14 Scissors for Fixing Sheet 14a Gripping Part 14b Opening / Closing Operating Part 16 Sheet Stop Plate 17 End Reinforcing Bar 20 Small Object Gripping Adapter

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koichi Machida 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Stock Company (72) Hidehiko Tojo 1-5-1, Kiba, Koto-ku, Tokyo Stockholders Inside Fujikura

Claims (3)

[Claims] 1. A flexible insulating sheet, sheet fixing scissors having gripping portions that sandwich the insulating sheet in a gently folded shape, and the vicinity of both edges of the folded insulating sheet, respectively. A protective cover for construction of a distribution line, comprising: a sheet stopper plate which is stopped along the inner surface of the grip portion of the sheet fixing scissors. 2. The protective cover for power distribution line construction according to claim 1, wherein end reinforcing rods for reinforcing the edges are attached to both edges of the insulating sheet. 3. In the grip portion of the sheet fixing scissors,
The protective cover for power distribution line construction according to claim 1, further comprising a two-fold-shaped thin object gripping adapter made of an elastic material for gripping a small object.