JPH08331723A - Hot line cutting and dividing tool - Google Patents

Abstract

PURPOSE: To provide a hot line cutting and dividing tool that enables hot-line work through remote operation. CONSTITUTION: The title hot line cutting and dividing tool consists of a rod- shaped wire stringer 3 that pulls a pair of chucks 5a, 5b installed on a distribution line 2 in the hot state at an appropriate interval and thereby slackens the distribution line 2 between the chucks 5a, 5b; and distribution line supporting portions 4a-4c that support the ends of the distribution line 2 cut between the chucks 5a, 5b, respectively. Anchoring rings 16, 25 to be operated by a remote operation means 40 are installed on hooks 21 attached both the ends of the rod-shaped wire stringer 3 and a rotational operation shaft 15 that expands and contracts the rod-shaped wire stringer 3. Each of the distribution line supporting portions 4a-4c consists of a retaining ring having an opening and a closing piece that closes the opening in such a manner the opening can be opened. An anchoring ring to be operated by the remote operation means 40 is installed on the closing piece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot wire cutting tool which can be suitably used when work is to be carried out by preventing power outages other than the minimum construction section.

[0002]

2. Description of the Related Art Conventionally, in the case of conducting distribution line work, etc., a utility pole equipped with a switch or the like shuts off the switch to cause a power failure, but the switch or the like is not installed on each utility pole. Therefore, there was a problem that the power outage for a long time was inevitable due to winding up even outside the construction section.

Therefore, as a method of solving such a problem, in JP-A-62-31312, a chuck is fixed to a distribution line at positions near both ends of a bar-shaped stretcher on both sides of a construction section. By pulling these chucks with a rod-type wire stretcher, the distribution line between the chucks is loosened while maintaining the tension of the distribution line, and the distribution line is cut, and the cut end outside the construction section is connected with a bypass cable. However, a method has been proposed in which the cut end on the side of the construction section is grounded to work, so that the power is cut off only in the construction section.

The rod-shaped stretcher used in this method is constructed so that it can be expanded and contracted by operating a ratchet handle, and the body of the rod-shaped stretcher supports the end of the cut distribution line. A pair of distribution line support tools are slidably, rotatably and fixedly mounted, and the distribution line is cut with both sides of the cutting position of the distribution line being supported by the distribution line support tool, and then one of the distribution line support tools It is configured to isolate the cut end of the distribution line by rotating and fixing it. The distribution line support is fixed by screwing the support pillar into a mounting ring that is slidably and rotatably fitted onto the body of the rod-shaped stretcher and engaging its tip with the outer periphery of the body of the rod-shaped stretcher. In addition, the strut is provided with a bifurcated electric wire receiving portion and a screw-type lock pin that closes the opening of the electric wire receiving portion.

[0005]

However, in the configuration of the hot wire cutting tool including the rod-shaped stretcher and the distribution line support disclosed in the above publication, the ratchet handle is operated to move the rod-shaped stretcher. To extend or contract, rotate the lock pin to support the distribution line with the distribution line support tool, screw the support pole to rotate or fix the distribution line support tool around the body of the rod-shaped stretcher, There is a problem that the workability is poor because the worker needs to work directly by hand to loosen it.

In view of the above-mentioned conventional problems, it is an object of the present invention to provide a hot wire cutting tool which can be operated by using a remote operation tool.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to a rod-shaped stretcher for loosening a distribution line between chucks by pulling a pair of chucks fixed to a distribution line in a live state with a proper gap and between the chucks. In a hot wire cutting tool having at least a pair of distribution line support parts that respectively hold both ends of the distribution line cut by the method, a rod-shaped stretcher includes a main body having a cylindrical portion and a rotatable inside the cylindrical portion. A screw shaft disposed on the screw shaft, a rotary operation part for rotating the screw shaft, and a telescopic cylinder body that is telescopically fitted to the tubular part and has one end screwed to the screw shaft. ,
The distribution line is provided with a connector for connecting one end of the main body and the chuck attached to the other end of the telescopic cylinder, and an engagement part provided for operating the rotation operation part and the connection device by a remote operation tool. The support portion is provided with a retaining ring having an opening in a part thereof, a closing piece for closing the opening portion so as to be able to open and close, and an engaging portion for operating the closing piece with a remote operation tool. And

Preferably, three distribution line support portions are provided, a pair of distribution line support portions are diametrically arranged and fixed at appropriate positions on the tubular portion, and the other distribution line support portion is a pair of distribution line support portions. It is fixed to the tubular portion so as to face one of the distribution line support portions with an appropriate gap in the axial direction.

[0009]

According to the present invention, the connecting members at both ends of the rod-shaped wire tensioner are connected to a pair of chucks fixed to the distribution line with appropriate intervals, and the rotating operation section is rotated to operate the distribution between the chucks. When performing the work of loosening the electric wire, the work can be performed by remote control by engaging the remote operation tool with the engaging portion provided on the coupling tool and the rotation operation section, and then the loosened arrangement. Even in the work of supporting an electric wire with a pair of distribution line support parts and cutting between them, the remote operation tool is engaged with the engaging part provided on the closing piece of the distribution line support part to open and close the closing piece. Then
The distribution line can be supported by remote control by appropriately grasping the distribution line with a remote control type gripping tool, and can be cut with a remote control type cutting tool as appropriate.

Further, in order to isolate the cut end of the distribution line by remote control, the distribution line support part may be configured to be rotatable by using a remote control tool, but three distribution line support parts are provided. A pair of distribution line support portions are arranged and fixed in the diametrical direction of the cylindrical portion, and the other one is arranged and fixed so as to face one of the distribution line support portions. Supported by the tool, after cutting by moving the cutting end portion supported by one of the distribution line support portions of the pair of distribution line support portions to the other distribution line support portion to support,
It is possible to stably fix and support with an inexpensive structure without employing a complicated structure that can be rotated and fixed by remote control.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot wire cutting tool according to an embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, 1 is a distribution line 2 in a live state.
It is a hot wire cutting tool for cutting at both sides of the construction section while maintaining its tension. The hot wire cutting tool 1 includes a rod-shaped stretcher 3 and distribution line support portions 4a to 4c. When cutting the distribution line 2 using the hot wire cutting tool 1, both sides of the construction section are cut. Section, the pair of chucks 5a and 5b are fixed to the distribution line 2 at appropriate intervals, and the chucks 5a and 5b are pulled by the rod-shaped wire tensioner 3 to pull the chucks 5a and 5b.
The distribution line 2 between b is loosened, and the distribution line 2 is cut with the distribution line 2 supported by the distribution line support portions 4a and 4c, and the cut end is isolated by the distribution line support portions 4b and 4c. It is configured to be held.

As shown in detail in FIG. 2, the rod-shaped stretcher 3 is composed of a main body 7 having a tubular portion, and an extendable tubular body 8 fitted in the tubular portion so as to extend and retract. Has been done. The main body 7 is configured by connecting and fixing an FRP cylindrical portion 10 to a main body case 9 made of an aluminum alloy.
Bevel gears 11 and 12 whose axes are orthogonal to each other are arranged in a state of being rotatably supported therein. The shaft center is the tubular portion 1
One end of a screw shaft 13 arranged on the axis of the tubular portion 10 is fixed to the bevel gear 11 arranged so as to coincide with the axis of 0. The other bevel gear 12 is a cover 1 made of an aluminum alloy that closes an opening formed on one side surface of the main body case 9.
4 is fixed to one end of a rotary operation shaft 15 penetrating therethrough, and the other end portion of the rotary operation shaft 15 protruding to the outside is engaged with the remote operation tool 40 shown in FIG. Annulus 16 is attached.

A Duracon cap 17 is fitted and fixed to the tip of the tubular portion 10, and the telescopic cylinder 8 is provided with the cap 1.
It is slidably supported by passing through 4. The expandable cylinder body 8 is made of FRP, and a nut member 18 screwed onto the screw shaft 13 is fixed to one end of the expandable cylinder body 8 so that the expandable cylinder body 8 expands and contracts by rotation of the screw shaft 13. A key 19 made of ABS resin is attached to the outer peripheral surface of the expandable cylinder 8 along the axial direction, and the key 16 is engaged with the cap 14 to prevent the expandable cylinder 8 from rotating. A cap 20 is fitted and fixed to the tip of the telescopic cylinder 8.

A hook 21 for connecting to the chucks 5a and 5b is attached to the body case 9 and the cap 20.
As shown in FIG. 1, the chuck 5 is
a and 5b are connected. The hook 21 has a separation preventing tongue piece 2 that is biased by a spring to close the opening.
3 and an operation lever 24 for rotating the detachment preventing tongue piece 23 in the opening direction, and an engagement ring for engaging the remote operation tool 40 at the tip of the operation lever 24 and performing the rotation operation. 25 are formed.

The distribution line supporting portions 4a-4c are shown in FIGS.
In order to operate the holding ring 26 having a substantially C-shaped opening 26a on one side, a closing piece 27 that opens and closes the opening 26a, and the closing piece 27 with the remote operation tool 30, as shown in FIG. The retaining ring 26 of the pair of distribution line support portions 4a and 4b is integrally formed in the diametrical direction with the boss portion 29 fitted and fixed to the tubular portion 10, The retaining ring 26 of the distribution line support portion 4c is integrally formed with a boss portion 30 externally fitted and fixed to the tubular portion 10 with a proper distance from the boss portion 29, and the distribution line support portions 4a and 4c are They are arranged so as to face each other with an appropriate interval.

An open end 26b of the retaining ring 26 on the radially outer side.
A groove-shaped guide portion 31 that guides the closing piece 27 in the radial direction of the tubular portion 10 is formed on the side surface of the closing piece 27, and a retaining pin 32 that is planted in the guide portion 31 is provided on the side surface of the closing piece. It is engaged with a long groove 33 formed in 27. In addition, the radially inner opening end 26c of the holding ring 26 is formed with a fitting recess 34 into which the tip of the closing piece 27 is fitted and which is elastic with the tip of the closing piece 27 fitted. There is provided a click means 35 for engagingly fixing.

As shown in FIG. 1, the remote operation tool 40 has an operating rod 41 made of a pipe material made of an insulating material, a hook-like engaging portion 42 provided at the tip thereof, and a T protruding at the back thereof. And a hook-shaped engagement portion 42 engaged with the engagement ring 16 to rotate the rotation operation shaft 15,
Further, the T-shaped engaging portion 43 is engaged with the engaging rings 25 and 28 to open the separation preventing tongue piece 23, or the closing piece 27 is slid to open and close.

In the above construction, when the distribution line 2 is cut at both sides of the construction section while maintaining its tension, the loop rope 2 is provided on each side as shown in FIG.
A pair of chucks 5a, 5b equipped with 2 are fixed to the distribution line 2 at appropriate intervals, and a telescopic cylinder body 8 is stretched in a lower portion between them as indicated by an imaginary line to extend the liveline cutting tool 1 Position, and the tongue pieces 23 for preventing the hooks 21 from separating at both ends thereof are opened by using the remote operation tool 40 to engage the loop ropes 22 attached to the chucks 5a and 5b with the hooks 21, respectively, and to connect to the distribution line 2. The hot wire cutting tool 1 is supported. Next, the hook-shaped engaging portion 42 of the remote operation tool 40 is engaged with the engagement ring 16 and the rotary operation shaft 15 is rotated by rotating the rotary operation shaft 15 as indicated by an arrow a, so that the telescopic cylinder is indicated by an arrow b. The body 8 is contracted and slid. Then, as shown by the solid line, the chuck 5
The a and 5b can be attracted to loosen the distribution line 2 between them.

Next, the remote operation tool 40 is attached to the engagement ring 28 of the closing tool 27 of the pair of distribution line support portions 4a and 4c facing each other.
Of the distribution line 2 loosened in the retaining ring 26 of the distribution line support portions 4a and 4c by opening the opening 26a of the retaining ring 26 by engaging the T-shaped engaging portion 43 and pushing up the closing tool 27.
Is appropriately inserted by a remote control gripping tool, and then the closing piece 27 is pulled down to close the distribution line supporting portions 4a, 4c.
The distribution line 2 is supported by. Next, the distribution line support portions 4a and 4c
After cutting with a remote-controlled cutting tool (not shown) at an intermediate position C, the pair of distribution line support portions 4 arranged in the diametrical direction.
The closures 27 of a and 4b are opened in the same manner as described above, and among the cut ends of the cut distribution line 2, the cut end on the side of the distribution line support 4a is appropriately grasped by the remote-control gripping tool to distribute the distribution line. Support part 4b
Of the distribution line support portion 4 in the same manner as above.
The cutting ends are isolated from each other by closing the closures 27 of a, 4b. Thus, the cutting of the distribution line 2 is completed. The cut end outside the construction section is connected with a bypass cable, and the cut end on the construction section side is grounded for work.
As a result, the distribution line 2 is brought into a live state and power is cut off only in the construction section so that the construction can be safely carried out in the construction section.

When the distribution line 2 is to be connected again after the completion of construction, a cutting sleeve held by the distribution line support 4c is fitted into the cut end held by the distribution line support 4c. After being held by the distribution line supporting portion 4a, the cut end portion is fitted into the other end side of the sleeve, and the sleeve is caulked to be connected again, and the hot wire cutting tool 1 is removed by substantially the opposite operation to the above. The original state can be restored by removing the chucks 5a and 5b.

In the above embodiment, the three distribution line support portions 4a ...
Although the example in which 4c is fixedly provided to the cylindrical portion 10 is shown, a pair of distribution line support portions are provided and one of them is remotely operated.
It may be configured so that it can be rotated by 80 °. However, when the three distribution line support portions 4a to 4c are fixedly provided, it is not necessary to employ a complicated configuration that allows the distribution line support portion to be rotated and fixed by remote control, and is stable with an inexpensive configuration. The cut end can be fixedly supported.

[0023]

According to the hot wire cutting tool of the present invention, the connecting tools at both ends of the rod-shaped stretcher are connected to the pair of chucks fixed to the power distribution line at appropriate intervals as described above, When performing the operation to loosen the distribution line between the chucks by rotating the rotation operation part, work remotely by engaging the remote operation tool with the engaging part provided on the connector and the rotation operation part. In the work of supporting the loosened distribution line with a pair of distribution line support parts and cutting it between them,
By engaging the remote control tool with the engaging part provided on the closing piece of the distribution line support part to open and close the closing piece, and by grasping the distribution line with the remote-controlled gripping tool, the remote operation can be performed remotely. The distribution line can be supported and appropriately cut by a remote-controlled cutting tool.

Further, three distribution line support portions are provided, a pair of distribution line support portions are arranged and fixed in the diameter direction of the cylindrical main body, and the other one is arranged to face one distribution line support portion. It is fixed and supported by the distribution line support tool arranged oppositely when cutting, and after cutting, the cut end supported by one distribution line support part of the pair of distribution line support parts is moved to the other distribution line support part. With this configuration, the cut end of the distribution line can be stably fixed and supported by an inexpensive structure without employing a complicated structure that can be rotated and fixed by remote control.

[Brief description of drawings]

FIG. 1 is a front view of a usage state of a hot wire cutting tool according to an embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view of the hot wire cutting tool of the same embodiment.

FIG. 3 is a front view of a distribution line support tool in the hot wire cutting tool of the embodiment.

4A and 4B show a distribution line support tool in the hot wire cutting tool of the embodiment, wherein FIG. 4A is a view taken along the line AA of FIG. 3, and FIG. 4B is a view taken along the line BB of FIG. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 live line cutting tool 2 distribution line 3 rod type wire tensioner 4a-4c distribution line support 5a, 5b chuck 7 main body 8 telescopic cylinder 10 tubular part 13 screw shaft 15 rotation operation shaft 16 engagement ring 21 hook ( Connection tool) 25 Engagement ring 26 Holding ring 27 Closing piece 28 Engagement ring 40 Remote operation tool

Front page continued (72) Inventor Ryoichi Saito 3-7-1, Ichibancho, Aoba-ku, Sendai City, Miyagi Prefecture Tohoku Electric Power Co., Inc. (72) Inventor Toshio Saito 4-1-1, Enooka, Miyagino-ku, Sendai City, Miyagi Prefecture Stock Company Yutec (72) Inventor Yasuharu Nagaki 3-43-1, Otada, Daito-shi, Osaka Stock Company Nagaki Seiki (72) Inventor Mitsuharu Honma 3-31, Otada, Daito-shi, Osaka Stock Company Nagaki Seiki

Claims (2)

[Claims] 1. A rod-shaped stretcher for loosening the distribution line between chucks by pulling a pair of chucks fixed to a distribution line in a live state at appropriate intervals, and both ends of the distribution line cut between the chucks. In a live wire cutting tool including at least a pair of distribution line supporting portions that respectively hold, a rod-shaped stretcher has a main body having a tubular portion, and a screw shaft rotatably disposed in the tubular portion. , A rotary operation part for rotating the screw shaft, an expandable telescopic cylinder fitted to the cylindrical part so as to extend and contract slidably, and one end of which is screwed onto the screw shaft, one end of the main body and the expandable expandable cylinder A connector attached to the other end of the chuck, and an engaging portion provided for operating the rotation operation part and the connection device by a remote operation tool, and the distribution line support part is partially provided. A retaining ring with an opening, a closing piece that opens and closes the opening, and a closing piece A live line cutting tool, comprising: an engaging portion for operating with an operating tool. 2. A distribution line support part is provided, and a pair of distribution line support parts are diametrically arranged and fixed at appropriate places of the tubular part, and another distribution line support part is a pair of distribution line. The hot wire cutting tool according to claim 1, wherein the live wire cutting tool is fixed to the tubular portion so as to face one of the support portions with an appropriate gap in the axial direction.