JP2000228808A - Tool and method for re-stringing overhead ground wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool and a method for re-stringing overhead ground wires, wherein re-stringing the overhead ground wires can be performed in safety without bringing an overhead ground wire into contact with a live wire. SOLUTION: An overhead ground wire G is held by a wire holder 6, and the gripping portion of the overhead ground wire G is pulled towards a moving roller 5 by operating a wire grip 7 to make an end of the overhead ground wire G slacken. In this state, the end of the overhead ground wire G is removed from the overhead ground wire connecting portion of a pole D, and subsequently the moving roller 5 is moved away from the pole D along a slide arm 1. Furthermore, an extension rod 3 is retracted to incline the slide arm 1 downward with the position of a fixture 2 used as a pivot, so that the overhead ground wire G is positioned diagonally under a live wire K which is strung on the pole D. Thereafter, the overhead ground wire G is removed from the wire holder 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replacement tool and an overhead ground used for mounting or removing an overhead ground line extended above a live line such as a high-voltage transmission line stretched on a telephone pole. This is related to the method of reassigning lines.

[0002]

2. Description of the Related Art Generally, an overhead ground wire is provided at the upper end of a power pole above a live line such as a high-voltage transmission line provided on the power pole.

[0003] Conventionally, when performing the replacement work for attaching or removing the overhead ground wire, the overhead ground wire has been removed in a state where the overhead ground wire is stretched above the live line on the telephone pole. There is a problem that the overhead ground wire may hang down during removal work and come into contact with live wires, or workers may come into contact with live wires, and this overhead ground wire replacement work is extremely dangerous. Was.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides an overhead ground wire that can be safely and efficiently attached and removed without contacting live wires. An object of the present invention is to provide a replacement tool and a replacement method.

[0005]

In order to achieve the above object, an overhead ground wire refilling tool according to the present invention comprises a slide arm extending in a substantially horizontal direction, and the slide arm attached to an upper end of a telephone pole. A mounting tool for tiltably mounting, a telescopic rod for supporting and fixing the slide arm from below at a position parallel to and away from the electric pole, mounting means for mounting the telescopic rod parallel to the electric pole, and moving the slide arm along the same It is characterized by comprising a movable roller attached to the movable roller, and a tensioner attached to the movable roller and having a gripper at the tip.

In order to achieve the above object, according to the method of relocating an overhead ground wire of the present invention, the slide arm is attached to the upper end of the telephone pole by a mounting tool so as to be tiltable, and the slide arm is mounted in parallel to the telephone pole by mounting means. After supporting and fixing the telescopic pole from below at a position parallel to and away from the utility pole, the moving roller is fixed to a position close to the utility pole on the slide arm, and stretched over the live line, such as a high-voltage power transmission line installed on the utility pole. A state in which the gripping portion of the overhead ground wire is pulled toward the moving roller side by operating a tension wire which grips the provided overhead ground wire with the gripper at the tip, and the end of the overhead ground wire is bent. In this state, remove the end of the overhead ground wire from the overhead ground wire connection part of the utility pole, and then move the moving roller in the direction away from the utility pole along the slide arm to move the overhead ground wire away from the utility pole and further expand and contract. Shrink the stick and slide The overhead ground wire is tilted downward with the fixture position as a fulcrum, and the overhead ground wire is positioned diagonally below the live line stretched on the telephone pole, and then the overhead ground wire is removed from the gripper. Features.

[0007] According to the above invention, the overhead ground wire can be installed at a position distant from the live line and below the live line at the time of rebuilding work for attaching and removing the overhead ground line. The ground wire does not come into contact with the live line, and there is no possibility that an operator or the like will come into contact with the live line, and the overhead ground line replacement operation can be performed safely and efficiently.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a replacement work for attaching or removing an overhead ground wire according to the present invention.

In this embodiment, the operation of removing the overhead ground line will be mainly described as the operation of replacing the overhead ground line. As shown in FIGS. 1 to 10, this embodiment of the removal work includes a slide arm 1 extending substantially horizontally and a mounting bracket (attachment) for attaching the slide arm 1 to the upper end of the utility pole D in a tiltable manner. ) 2, a telescopic rod 3 for supporting and fixing the slide arm 1 from below at a position parallel to and slightly away from the electric pole D, and mounting means (specifically, the telescopic rod 3) for attaching this telescopic rod 3 to the electric pole D in parallel. An arm mounting member 34 provided therein, a mounting auxiliary metal fitting 4) to be described later, a moving roller 5 movably mounted on the slide arm 1 along the same, and a gripper attached to the moving roller 5 and having a tip at a tip thereof. 6 and a drawer 7 having the same. The telescopic rod 3 is attached to the utility pole D by the above-mentioned attaching means in a state where the overhead ground wire G is extended so as to be at a height of 60 cm or more from the live line K, and the slide arm 1 is supported and fixed.

In order to remove the overhead ground wire G using the various fittings installed on the telephone pole D as described above, first, the moving roller 5 is fixed at a position on the slide arm 1 close to the telephone pole D. I do. Next, the overhead ground wire G stretched above the live wire K stretched over the telephone pole D is gripped by the gripper 6 at the tip of the wire stretcher 7 attached to the moving roller 5. By the operation of 7, the gripping portion of the overhead ground wire G is drawn toward the moving roller 5 so that the end of the overhead ground wire G is bent. In this state, the end of the overhead ground wire G is removed from the overhead ground wire connection portion (not shown) of the telephone pole D. Specifically, the winding grip is removed from the support insulator, and the end of the overhead ground wire G is set in a free state.

Next, the position of the moving roller 5 is released, and the moving roller 5 is moved away from the utility pole D along the slide arm 1 so that the overhead ground wire G is kept at least 60 cm away from the hot wire K. To move the overhead ground wire G away from the utility pole D, and at that position, move the moving roller 5 to the slide arm 1
Fix the position on top.

Further, the telescopic rod 3 is contracted, and the slide arm 1 is tilted obliquely downward with the position of the mounting bracket 2 as a fulcrum, so that the overhead ground wire G is positioned obliquely below the live line K provided on the telephone pole D.

Next, the overhead ground wire G gripped by the wire gripper 6 of the wire stretching device 7 attached to the moving roller 5 is removed from the wire gripper 6.

The above-mentioned operation of removing the overhead ground wire is also performed in parallel on adjacent power poles, and the overhead ground wire G stretched between a plurality of power poles is secured in a safe state at a position below the live line K. It is removed efficiently.

Next, each refilling tool will be described in detail with reference to FIGS.

As shown in FIGS. 4 (a) and 4 (b), the mounting bracket 2 has a metal fitting main body 21 and a curved fixing portion pivotally attached to one side of the metal fitting main body 21 via a bending portion 22. 23,
A screw shaft 24 provided facing the curved fixing portion 23, a tightening nut 26 screwed to the screw shaft 24, and a joint pin 11 of the slide arm 1 described later are inserted into the other side of the metal fitting main body 21. And a fixing screw 27 for fixing the joint pin 11, and a position adjusting bolt 28 for screwing the holed block 25 into this to adjust the position thereof. It has.

The mounting bracket 2 engages the tip fork 23a of the curved fixing portion 23 with the screw shaft 24, tightens the tightening nut 26, and the flange 26 of the tightening nut 26.
By pushing the tip fork portion 23a with b,
The upper part of the crown C (see FIG. 2) provided at the upper end of the electrode D is sandwiched between the curved fixing part 23 and the curved part 22, and is fixed to the crown C. The tightening nut 26 and the fixing screw 27 are respectively provided with eyeball portions 26a,
7a so that remote operation is possible.

The slide arm 1 is, as shown in FIG.
It has a rectangular tube shape, and has a joint pin 11 for a mounting bracket and a joint pin 12 for a telescopic rod mounted on lower surfaces at two places on the left and right sides via pivot pins 11a and 12a, respectively. Joint pin 11 for mounting bracket
As described above, the slide joint pin 12 is inserted by being inserted into the holed block 25 of the mounting bracket 2 and attached.
Can be inserted and attached to the head 31 (see FIG. 8) of the telescopic rod 3 described later.

A movable roller 5 is mounted on the slide arm 1 so as to be movable left and right.

As shown in FIGS. 6 (a) and 6 (b), the moving roller 5 is provided inside the moving roller main body 51 having a substantially U-shape in front view and in contact with the four side surfaces of the sliding arm 1 so that the sliding arm 1 is moved. Guide rollers 52, 5 for moving the upper side
7, 58 are rotatably mounted. An extension roller body 53 is provided above the moving roller body 51, and extension rollers 54a, 54b, 54c, and 54d are rotatably mounted on the inside of the extension roller body 53 at the left, right, up, and down. ing. Further, a position fixing screw 55 for fixing the moving roller 5 to a desired position of the slide arm 1 is provided on one side surface of the moving roller main body 51, and a joint bolt 77 of the drawer 7 is connected to the other side surface. An eye-shaped mounting portion 59 is provided.

As shown in FIG. 7, the auxiliary mounting bracket 4 includes a rod-shaped main body 43 and a fixing portion 41 which is located on the base end side of the main body 43 and is mounted on the electric pole D in a wound state.
And a mounting pin 42 which is located on the distal end side of the main body 43 and is inserted into a joint fitting 37 of the telescopic rod 3 described later to support the telescopic rod 3 in an upright state.

The telescopic rod 3 is, as shown in FIG.
3 and a clamp 3 attached to the center of the pillar body 33.
4a, a head 31 provided at the upper end of the column main body 33, a telescopic rod-like portion 35 inserted into the column main body 33 so as to be extendable and contractible, and provided at a lower end of the column main body 33. Input shaft 3 for extending and retracting the telescopic bar 35
Gearbox 36 having a joint 6a
And a fixing screw 39 for fixing the telescopic rod joint pin 12.

Then, the slide arm 1 inserts the telescopic rod joint pin 12 into the head 31 and the fixing screw 3
9 (see FIG. 3). Also, as shown in FIG. 1, the arm fitting 34 is inserted into the arm A of the utility pole D, and the telescopic rod 3 is fixed to the utility pole D by tightening the clamp 34a. Further, by attaching the joint fitting 37 of the telescopic rod 3 to the mounting pin 42 of the auxiliary mounting bracket 4, the telescopic rod 3 is fixed to the utility pole D so as to be parallel thereto.

As shown in FIGS. 9 (a) and 9 (b), the wire stretching device 7 includes a belt 72 wound around the main body 71, a brake gear 73 for winding the belt 72, and a check pawl 74. , An input shaft 75 that rotates in only one direction, a joint bolt 76 provided on the main body 71 side for attaching to the moving roller 5, and a belt 7 for attaching the gripper 6.
2 and a joint bolt 77 provided on the tip side.

As shown in FIGS. 10 (a) and 10 (b), the gripping device 6 is provided with a movable holding portion 6 provided on one side of the main body 61.
2 and a movable holding portion 62 provided on the other side of the main body 61.
, A fixing hole 64 for inserting the joint bolt 76 of the wire tensioner 7 and attaching it to the wire tensioner 7, and a fixing screw 64 for ensuring a gripping state. Then, the movable side holding portion 62 and the fixed side holding portion 63 hold the overhead ground wire G in a state of being held therebetween.

Next, the operation of removing the overhead ground line G will be described.

First, as shown in FIG. 2, the fitting 2 is fitted to the upper part of the crown C provided at the upper end of the utility pole D with the curved fixing part 23 opened, and 23
Is closed and the fastening nut 26 is tightened, whereby the mounting bracket 23 is mounted and fixed on the upper part of the crown C provided at the upper end of the utility pole D.

Next, as shown in FIG. 3, the joint pin 11 for the mounting bracket of the slide arm 1 is inserted into the block 25 with a hole of the mounting bracket 2 and mounted, and as shown in FIG. The slide arm 1 is shown by a solid line in FIG. 1 by inserting and inserting the joint pin 12 for the extendable rod of the slide arm 1 into the head 31 of the extendable rod 3 attached by using the fixture 34 and the auxiliary fitting 4 for attachment. So that the overhead ground line G can be kept at a distance of 60 cm or more from the live line K in the horizontal direction.

Next, as shown by a solid line in FIG. 1, the moving roller 5 is mounted and fixed on the slide arm 1 at a position near the utility pole D. In this state, after attaching the joint bolt 76 of the wire tensioner 7 to the mounting portion 59 of the moving roller 5, the wire gripper 6 grips a predetermined portion of the overhead ground wire G, and 75 is rotated using a ratchet wrench or the like to rotate the belt 72.
And pulls the gripping portion of the overhead ground wire G toward the moving roller 5 to end the overhead ground wire G (it may end at the portion of the power pole D, but the wire is extended toward the next power pole. In some cases).

Then, in this state, the winding grip is removed from the supporting insulator, and the end of the overhead ground wire G is set in a free state.

Next, as shown by a two-dot chain line in FIG. 1, the moving roller 5 is horizontally moved on the slide arm 1 in a direction away from the utility pole D so that the overhead ground wire G can be separated from the hot wire K by 60 cm or more. , And the extensible rod 3 is moved to the input shaft 3 as shown by a two-dot chain line in FIG.
6a is rotated by a rotating handle or the like to contract it, and the slide arm 1 is tilted obliquely downward with the position of the mounting bracket 2 as a fulcrum, and the overhead ground wire G is positioned obliquely below the live line K stretched over the telephone pole D. . Since the joint pins 11 and 12 and the slide arm 1 are connected via the pivot pins 11a and 12a, the operation of tilting the slide arm 1 is performed smoothly. At this position, the slide arm 1 is fixed in position.

Next, the gripper 6 is released to release the ground wire G
To remove.

In the operation of attaching the overhead ground wire, after removing the overhead ground wire as described above, a new overhead ground wire can be attached to the telephone pole D in the reverse order of the above removal operation.

[0034]

As described above, according to the present invention,
When installing or removing the overhead ground line, the overhead ground line can be moved diagonally below and away from the live line, so this overhead ground line replacement operation can be performed safely and efficiently. .

[Brief description of the drawings]

FIG. 1 is a schematic explanatory perspective view showing a method for removing an overhead ground wire according to an embodiment of the present invention.

FIG. 2 is a front view showing a state in which a mounting bracket used in the present embodiment is mounted on a crown above an electric pole.

FIG. 3 is a front view showing a method of attaching a slide arm to a utility pole in the method of removing an overhead ground wire according to the present embodiment.

4A and 4B show a mounting bracket used in the present embodiment, wherein FIG. 4A is a plan view and FIG. 4B is a front view.

FIG. 5 is a front view showing a state in which a moving roller is mounted on a slide arm in the embodiment.

6A and 6B show a moving roller used in the embodiment, and FIG.
Is a front view, and (b) is a side view.

FIG. 7 is a plan view of an attachment metal fitting used in the embodiment.

FIG. 8 is a front view of a telescopic rod used in the present embodiment.

FIGS. 9A and 9B show a cording device used in the present embodiment, wherein FIG. 9A is a plan view and FIG. 9B is a front view.

FIGS. 10A and 10B show a gripper used in the present embodiment, wherein FIG. 10A is a front view and FIG. 10B is a side view.

[Explanation of symbols]

 D Telegraph pole G Overhead ground wire K Live line 1 Slide arm 2 Mounting bracket 3 Telescopic rod 4 Auxiliary mounting bracket 5 Moving roller 6 Grabber 7 Cable stretcher 34 Arm bracket

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takuji Kanda 6-12 Koamicho, Naka-ku, Hiroshima-shi Chuden Corp. (72) Inventor Koji Nagaki 3-4-1-3 Taida, Daito-shi, Osaka Nagaki Seiki Co., Ltd. (72) Inventor Koji Tsubooka 3-4-1-3 Tayoda, Daito City, Osaka Pref.

Claims (3)

[Claims] 1. A slide arm extending in a substantially horizontal direction, a fixture for attaching the slide arm to the upper end of a utility pole so as to be tiltable, and a support for fixing the slide arm from below at a position parallel to and away from the utility pole. A telescopic rod, a mounting means for mounting the telescopic rod in parallel with the electric pole, and a moving roller movably mounted on the slide arm along the same.
An overhead ground wire refilling tool which is attached to the moving roller and comprises a wire tensioner having a gripper at a tip. 2. After the slide arm is tiltably attached to the upper end of the utility pole by means of a fixture, and supported and fixed from below by a telescopic rod attached parallel to the utility pole at a position parallel to and away from the utility pole by attaching means, The moving roller is fixed at a position close to the utility pole on the slide arm, and the overhead ground wire stretched above the live line, such as a high-voltage transmission line stretched over the utility pole, is gripped by the gripper at the tip. By operating the wire detector,
The gripping part of the overhead ground wire is pulled toward the moving roller side to bend the end of the overhead ground wire, and in this state, the end of the overhead ground wire is removed from the overhead ground wire connection portion of the telephone pole, and then moved. Move the roller in the direction away from the utility pole along the slide arm to move the overhead ground wire away from the utility pole, further shrink the telescopic rod, and tilt the slide arm diagonally downward with the mounting position as the fulcrum, thereby turning the overhead ground wire into a utility pole. A method for relocating an overhead ground line, wherein the overhead ground line is detached from the gripper after being positioned diagonally below the live line stretched over. 3. When the slide arm is attached to the utility pole in a substantially horizontal direction so that the overhead ground wire can be kept at a distance of 60 cm or more from the live line, and the moving roller is moved from the utility pole along the slide arm. 3. The method according to claim 2, further comprising moving the overhead ground line and the live line so as to maintain a distance of 60 cm or more.