JP2004015877A - Aerial wire spacing widening tool and method for widening spacing between aerial wires and supporting wires using this - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aerial wire spacing widening tool which is simply constituted at low cost and yet makes it possible to easily and quickly widen the spacing between three existing aerial wires parallel with one another in a short period of time, and a method wherein the spacing between three aerial wires can be favorably widened and the wires are favorably supported using the tool. <P>SOLUTION: A middle wire gripping member 3 for gripping a middle aerial wire S2 is rotatably installed at the substantially central part of one main body rod 2. A line wire gripping member 7 which is brought into a state of gripping aerial wires S1 to S3 by external operation. The line wire gripping member 7 is installed at either or both of two parts at both the ends of the main body rod 1 and apart from the middle wire gripping member 3 by a distance equivalent to the spacing between the aerial wires S1 to S3 to be widened. At the same time, a line wire gripping member which is brought into a state of gripping the aerial wires S1 to S3 by external operation or a line wire holding member 4 which holds the aerial wires S1 to S3 is installed at the other. An engaging portion 41 with which a remotely operating tool is detachably engaged is installed on one end of the main body rod 2. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an overhead wire enlarging tool and an overhead wire widening tool used for, for example, remotely extending the distance between three existing overhead wires that are parallel to each other when performing a cutting work at a wiring location. The present invention relates to a preferred construction method capable of maintaining the space between existing overhead wires in a widened state.
[0002]
[Prior art]
When performing separation work to connect a bypass cable line to a plurality of existing overhead lines, a method of performing wiring while remotely operating with an insulated remote control tool while power is supplied to the existing overhead lines (hereinafter, referred to as a hot stick method) It is preferable to employ This is because if the construction is performed with the power supply side circuit of the wiring location where the separation construction is to be performed cut off, the power outage affects a wide range of power consumers during the construction. In order to adopt the hot stick method, it is necessary to widen a plurality of existing overhead lines having relatively small intervals so that the cutting tool can be easily attached or detached.
[0003]
Therefore, conventionally, in order to use a cutting tool by a hot stick method at a parallel overhead wiring location such as a triangular pillar wiring, a total of three existing overhead wirings, one on the upper side and one on the lower side, are used. There has been proposed an overhead wire widening tool and an overhead wire widening holding method for gripping the wire and widening the overhead wire interval (see Japanese Patent Application Laid-Open No. 9-289715). The overhead wire enlarging device has an overhead wire gripping device at both ends and a widening horizontal rod having an expansion / contraction mechanism, a connecting device detachably connected to a shaft portion of the widening horizontal rod at an upper end, and an overhead wire gripping device at a lower end. And a widening vertical rod having a telescopic mechanism. When widening the existing overhead wire, the widening horizontal rod is supported by inserting the upper two existing overhead wires into the overhead wire gripping tools at both ends thereof, and the widening horizontal rod is attached to the shaft portion of the widening horizontal rod. After connecting the connecting portions of the vertical rods, inserting the lower existing overhead wire into the overhead wire gripping tool of the widening vertical rod, and before and after this, the three overhead wire gripping tools are gripped, and then both rods are connected. The extension is performed in such a manner that the three overhead lines are maintained in a state where the distance between them is widened.
[0004]
[Problems to be solved by the invention]
However, the above overhead wire widening device is limited to applications in which the distance between two parallel existing overhead wires, two on the upper side and one on the lower side, is widened. For example, three parallel lines in the vertical or horizontal direction are used. It cannot be used for widening the gap between existing overhead lines. Moreover, the horizontal rod for widening is adapted to move the inner cannula provided so as to be able to move in and out of the mantle tube by screwing a screw rod and a nut rotated by a combination of a pair of bevel gears. An existing overhead wire gripper is provided at the outer end of each of the tube and the intubation. The widening horizontal rod has a gripper similar to the above at one end, and a coupling tool, a pair of bevel gears, a screw for rotating operation, a screw rod for moving the intubation tube, and the like at the other end. have. As described above, since the overhead wire widening tool has a complicated structure having a large number of parts, it not only increases the cost but also has poor durability due to the complicated configuration.
[0005]
Further, the overhead wire widening device is assembled by connecting a widening vertical rod to a shaft portion of a widening horizontal rod supported by two existing overhead wires and using a remote control terminal to assemble a remote control wrench. Tighten the drive screw of each of the three overhead wire gripping tools, use the remote control hook tool to rotate the operation ring for rotating the screw rod in the widening horizontal rod, and use the remote control wrench to widen the vertical rod. However, since many complicated operations such as rotating the hexagonal screw head for rotating the screw rod and assembling work with poor workability are required, there is a problem that it takes too much time to widen the existing overhead wire.
[0006]
In view of the above, the present invention has been made in view of the above-mentioned conventional problems, and has a simplified and inexpensive configuration, and allows three existing overhead lines parallel to each other to be easily and quickly expanded in a short time. An object of the present invention is to provide an existing catenary wire widening tool that can perform widening and maintenance of three existing catenary wires using the existing catenary wire widening tool.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an overhead wire enlarging device according to the present invention widens the interval between three existing overhead wires that are parallel to each other. A middle gripping member that grips the middle overhead wire of the overhead wire is rotatably mounted, and is separated from the middle gripping members at both ends of the main body rod by a distance corresponding to an interval to widen the overhead wire. At least one of the two parts is provided with an external wire gripping member that is brought into a holding state from the holding state by the external operation to the overhead wire, and the other external wire is brought into a gripping state from the holding state by the external operation on the overhead wire. An external line holding member for holding a gripping member or an overhead wire is attached, and an engagement portion with which a remote operation tool is detachably engaged is provided at one end of the main body rod. It is a symptom.
[0008]
This overhead wire widening device has a simple configuration in which a center line gripping member is attached to the center of one main body rod, and an external line gripping member or an external line holding member is attached to both ends, respectively. Since the holding member is provided at the position corresponding to the interval to widen the existing overhead wire, there is no need for a telescopic mechanism consisting of a complicated configuration such as the conventional bevel gear, screw bar, combination of mantle tube and inner tube. As a result, significant cost reduction can be achieved. In addition, this overhead wire widening device has an advantage that it is possible to widen the space between the three existing overhead wires even if the existing overhead wires are wired in any of the horizontal direction and the vertical direction. In addition, since there is no telescopic mechanism, there is no need to perform a rotating operation using a wrench for remote control or the like. , The working time can be greatly reduced.
[0009]
The overhead wire widening holding method using the overhead wire widening tool of the present invention is characterized in that the middle wire gripping member of the overhead wire widening tool of the above invention is gripped by the middle overhead wire of three existing overhead wires parallel to each other. By mounting the main body rod in a supported state and rotating the main body rod around the center line gripping member rotatably attached thereto, an outer line gripping member at one end and an outer line gripping member at the other end of the main body rod Alternatively, after the outer wire holding member is engaged with the outer two overhead wires in a holding state, the remote operation tool is engaged with the engagement portion at one end of the main body rod, and then the remote operation tool is pulled or pressed. The main body rod is rotated by operation until it becomes a relative arrangement substantially orthogonal to the three overhead lines, and the two overhead lines on both sides are widened in a direction away from the middle overhead line, and at least one of the overhead lines is widened. Said By the outer gripping member is gripping the overhead wire in the external gripping member by an external operation, is characterized in that to hold the three said overhead line of the widening state.
[0010]
In the overhead wire widening holding method using this overhead wire widening tool, the remote control tool is engaged with the engaging portion while the middle gripping member is supported by being gripped by the middle existing overhead wire, Just by lowering the operation tool and rotating the overhead wire widening tool, for example, the interval between each existing overhead wire can be widened at once, and the widening horizontal rod and widening vertical rod like the conventional overhead wire widening tool can be used. No complicated operation or assembly work with poor workability such as assembling by coupling, tightening the drive screw with a remote operation wrench, and rotating the hexagonal screw head for rotating the screw rod using a remote operation wrench is extremely unnecessary. Since only a few operations with good workability need to be performed, the work time can be greatly reduced.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 (a) and 1 (b) are a partially broken front view and a partially broken side view showing a catenary wire widening tool main body 1 in a catenary wire widening tool according to an embodiment of the present invention. This overhead wire enlarging device is constituted by an overhead wire enlarging device main body 1 and a bypass line holder described later. The overhead wire enlarging tool main body 1 has a simple configuration in which the center line gripping member 3 is attached to the center of one main body rod 2, and the upper line holding member 4 and the lower line gripping member 7 are attached to both ends. .
[0012]
The center wire gripping member 3 includes an overhead wire receiving member 8 and a screw rod 10 screwed into a screw hole 9 of the overhead wire receiving member 8. The overhead wire receiving member 8 is provided with a semicircular overhead wire receiving portion 8a into which the middle existing overhead wire S2 of the three existing overhead wires S1 to S3 parallel to each other is fitted. An overhead wire pressing member 11 is attached to one end of the threaded rod 10 on the overhead wire receiving portion 8a side, and a rotation operation ring 12 is fixed to the other end of the threaded rod 10. Although not shown, one end of the screw rod 10 is rotatably inserted into the overhead wire pressing member 11, and a retaining portion is engaged with an annular groove of the screw rod 10. Accordingly, when the overhead wire pressing member 11 comes into contact with the existing overhead wire S2, the overhead wire pressing member 11 is pressed against the existing overhead wire S2 without rotating regardless of the rotation of the screw rod 10. The overhead wire receiving member 8 of the center wire gripping member 3 is rotatably attached to the main body rod 2 by an attachment pin 13.
[0013]
As shown in FIG. 2, which is an enlarged front view of the upper line holding member 4, a U-shaped bracket 14, a lock pin 17 for opening and closing the open end of the U-shaped bracket 14, and a U-shaped bracket 14, a roller 18 rotatably provided, a ball 19 for temporarily fixing the lock pin 17 to an open position and a closed position, and a spring 20 for urging the ball 19 in a direction of pressing the ball 19 against the lock pin 17. It is configured. The upper line holding member 4 is attached to the main body rod 2 by a fixing screw 15.
[0014]
A guide hole 21 through which the lock pin 17 penetrates, and a locking recess 22 formed on the inner surface side of the side wall so as to communicate with the guide hole 21 are provided on one side wall (left side in the figure) of the U-shaped bracket 14. And a mounting hole 23 communicating with the guide hole 21 from the upper surface of the side wall. The ball 19 and the spring 20 are inserted into the mounting hole 23, and are closed by a plug 28. A guide hole 27 having a diameter for inserting the fall prevention flange 24 at the tip of the lock pin 17 is formed on the other side wall (right side in the figure) of the U-shaped bracket 14.
[0015]
On the other hand, the lock pin 17 is formed with annular grooves 29 and 30 in which the ball 19 is fitted and temporarily fixed at a closed position shown by a solid line and an open position shown by a two-dot chain line, respectively. An operation ring 31 and a positioning flange 32 for positioning the operation ring 31 at the closed position are provided at the portion (the left end in the figure). Therefore, when the lock pin 17 is pulled outward through the operation ring 31, the lock pin 17 pushes the ball 19 out of the annular groove 29 against the urging force of the spring 20, and moves to the open position indicated by the two-dot chain line. . At this time, the lock pin 17 is prevented from falling out by the fall prevention flange 24 being fitted into the locking concave portion 22, and the ball 19 is fitted into the annular groove 30 and temporarily fixed to the open position. Conversely, when the lock pin 17 is pushed inward from the open position, as shown by the solid line, the positioning flange 32 abuts on the outer surface of the U-shaped bracket 14 to be positioned in the closed position, and the ball 19 is positioned in the annular groove 29. And temporarily fixed to the closed position.
[0016]
The underline gripping member 7 includes a mounting frame 34 having one end rotatably mounted on the main body rod 2 by a mounting pin 33, and a roller rotatably mounted on a U-shaped portion of one end of the mounting frame 34. 37 and a screw rod 38 screwed into a screw hole (not shown) of the mounting frame 34. An overhead wire pressing member 39 is attached to one end of the screw rod 38 on the roller 38 side, and a rotation operation ring 40 is fixed to the other end of the screw rod 38. Although not shown, one end of a screw rod 38 is rotatably inserted into the overhead wire pressing member 39, and a retaining portion is engaged with an annular groove of the screw rod 38. Thus, when the overhead wire pressing member 39 contacts the existing overhead wire S3, the overhead wire pressing member 39 is pressed against the existing overhead wire S3 without rotating regardless of the rotation of the screw rod 38.
[0017]
Further, a hook locking portion 41 for hooking a remote control hook tool (not shown) is provided on both ends of the main body rod 2 on the side where the underline gripping member 7 is provided. And a hook portion 42 to which a hanging string described later is tied. In the vicinity of the hook portion 42, a drop-preventing piece 44 of a hanging string tied to the hook portion 42 is rotatably provided. The latch hook portion 42 is urged in the closing direction. Further, an operation ring 47 for operating the drop prevention piece 44 in the opening direction is attached.
[0018]
The main body rod 2 is made of a material having excellent electric insulation, low hygroscopicity, and not easily deformed or having low insulation performance, such as an epoxy resin reinforced plastic (FRP). Is formed. The main body rod 2 is provided with rain cuts 48 for working in rainy weather on both sides of the center wire gripping member 3, and a fluorine resin tube 49 is wound around each of the rain cuts 48. I have. In addition, gripped portions 50 and 51 formed by winding contraction tubes are provided on both sides of one rain gutter 48 in the main body rod 2. On the other hand, when the three existing overhead lines S1 to S3 whose width is to be widened are arranged in a horizontal direction and are parallel to each other, the gripped portion 50 holds the overhead line widening tool main body 1 with a holding tool such as a barefoot. It is for. When the three existing overhead lines S1 to S3 whose widths are to be widened are arranged in parallel in the vertical direction and are parallel to each other, the other gripped portion 51 holds the overhead line widening tool main body 1 with a holding tool such as a barber. It is for.
[0019]
The above-mentioned overhead wire enlarging tool main body 1 has a simple configuration in which the center line gripping member 3 is attached to the center of one main body rod 2, and the upper line holding member 4 and the lower line gripping member 7 are attached to both ends, respectively. Since the two gripping members 3 and 7 and the one holding member 4 are provided in an arrangement corresponding to an interval at which the three existing overhead lines S1 to S3 are to be widened, the conventional bevel gear, screw rod, and outer jacket An expansion and contraction mechanism having a complicated configuration such as a combination of a tube and an intubation tube is not required, and a significant cost reduction can be achieved. In addition, even if the three existing overhead lines S1 to S3 are arranged and wired in any of the horizontal direction and the vertical direction, the overhead line widening tool main body 1 has an advantage that the width of these intervals can be widened. In addition, since there is no telescopic mechanism, there is no need to perform a rotating operation using a remote control wrench or the like. Since the interval between S1 and S3 can be widened, the operation time is greatly reduced.
[0020]
Next, a method of widening and holding the space between the three existing overhead lines S1 to S3 using the overhead line widening tool body 1 will be described with reference to FIG. In this embodiment, as shown in FIG. 3, a case where the interval between three existing overhead lines S <b> 1 to S <b> 3 arranged in parallel in a vertical direction and wired in parallel with each other will be described as an example. First, the catenary wire widening device main body 1 is set in a state where both the gripping members 3, 4 and the underline grasping member 7 are opened and the existing catenary wires S1 to S3 can be inserted, and a terminal for remote operation (not shown) is used. After gripping the gripped portion 51 of the overhead wire enlarging tool main body 2 in the vertical direction, the overhead wire enlarging tool body 1 is brought close to each of the existing overhead wires S1 to S3 in a vertical arrangement, and as shown by a two-dot chain line in FIG. By inserting the middle existing overhead wire S1 into the overhead wire receiving portion 8a of the overhead wire receiving member 8 of the middle wire holding member 3 so as to cover the overhead overhead wire S1, the overhead wire enlarging tool body 1 is supported by the existing overhead wire S2.
[0021]
Next, by using a remote control hook tool (not shown) to rotate the rotary operation ring 12 of the center wire gripping member 3 to cause the screw rod 10 to enter the existing overhead wire S2 side, as shown in FIG. Then, the existing overhead wire S2 is sandwiched and gripped by the overhead wire receiving portion 8a and the overhead wire pressing member. Thereby, the catenary wire widening device main body 1 is attached to the middle existing catenary wire S2 in a reliable supporting state without falling off.
[0022]
Subsequently, after the remote control hook tool separated from the rotary operation ring 12 of the center line gripping member 3 is engaged with the hook locking portion 41 in a hooked state, the remote control hook tool is pulled down. Manipulate. As a result, the catenary wire widening device main body 1 rotates about the mounting pin 13 of the middle line gripping member 3 as a rotation fulcrum, and as shown by the two-dot chain line in FIG. It is an inclined arrangement that comes into contact with the existing upper and lower overhead wires S1 and S3. From this state, as shown by a two-dot chain line in FIG. 1A, the upper existing overhead wire S1 is inserted into the U-shaped bracket 14 of the upper line holding member 4 to make contact with the upper surface of the roller 18, An operation is performed so that the existing overhead wire S3 is applied to the lower surface of the roller 37 of the underline gripping member 7.
[0023]
In the above state, after the hook for remote control is hooked on the operation ring 31 of the upper line holding member 4, pressure is applied in a direction to push the lock pin 17 in the open position at this time. Thereby, as described in FIG. 2, the lock pin 17 is positioned at the closed position as shown in FIG. 1A, and is held so that the existing overhead wire S <b> 1 does not come out of the U-shaped bracket 14. On the other hand, the underline gripping member 7 is kept in the state shown in FIG. 1 (a), and the hook for remote control is hooked on the hook engaging portion 41. The main body 1 is further rotated. As a result, the overhead wire enlarging tool main body 1 changes from the inclined arrangement shown by the two-dot chain line in FIG. 3 to the vertical arrangement shown by the solid line, and at this point, the lowering operation of the remote control hook tool is stopped. At this time, the upper line holding member 4 and the lower line holding member 7 reliably hold the engagement state with the existing overhead wires S1 and S3 by the rollers 18 and 37 rolling along the corresponding existing overhead wires S1 and S3. It is displaced with little resistance load. When the catenary wire widening tool main body 1 is set in the vertical state in this way, the three existing catenary wires S1 to S3 are set by the arrangement intervals of the upper line holding member 4, the middle line holding member 3, and the lower line holding member 7. The width is increased at a predetermined interval.
[0024]
When the widening operation of the interval between the existing overhead lines S1 to S3 is completed in this way, the screw rod 38 is turned to the existing overhead line S3 side by turning the rotation operation ring 40 of the underline gripping member 7 using a hook tool for remote control. As a result, as shown in FIG. 5, the existing overhead wire S <b> 3 is gripped by being sandwiched between the roller 37 and the overhead wire pressing member 39. Accordingly, in addition to the gripping of the existing overhead wire S2 by the middle wire gripping member 3, the underline gripping member 7 grips the existing overhead wire S3. Thus, the gripping at these two places fixes the overhead wire enlarging tool body 1 in a non-rotatable state. Therefore, the three existing overhead lines S1 to S3 can be reliably held in a state where the distance between them is widened. Thereby, the cutting work for connecting the bypass lines such as the cable lines to the existing overhead lines S1 to S3 can be performed with good workability without the adjacent existing overhead lines S1 to S3 being in the way.
[0025]
In the overhead wire widening holding method using the overhead wire widening tool main body 1 described above, a hook tool for remote operation is attached to the hook locking portion 41 in a state where the middle wire gripping member 3 is supported by being gripped by the middle existing overhead wire S1. After engaging in the latched state, the distance between the existing overhead wires S1 to S3 can be increased at a stroke only by pulling down the remote control hook tool, and the widening like a conventional overhead wire expanding tool can be performed. Complicated operation and poor workability, such as assembling by connecting the horizontal rod and the vertical rod for widening, tightening the drive screw with a remote control wrench, and rotating the hexagonal screw head for screw rod rotation using a remote control wrench Since no assembling work is required and only a few operations with extremely good workability need to be performed, the work time can be greatly reduced.
[0026]
FIG. 4 is a plan view showing a bypass line holding tool 52 that constitutes an overhead wire widening tool used together with the overhead wire widening tool main body 1. The bypass line holder 52 is provided at one end of an arm 53 with a mounting portion 54 which is fixed to the main rod 2 of the catenary wire widening tool main body 1 in a state of gripping the main rod 2, and the other end of the arm 53. Further, as shown in FIG. 5, a bypass line holding portion 59 for holding bypass lines 57 and 58 connected to the existing overhead lines S1 to S3 is provided. The mounting portion 54 includes the rod receiving member 8 of the main body rod 2 and a screw rod 62 screwed into the screw hole 61 of the rod receiving member 60. A rod pressing member 63 is attached to one end of the screw rod 62 on the rod receiving member 60 side, and the rotation operation ring 12 is fixed to the other end of the screw rod 62. On the other hand, the bypass holder 59 has a U-shaped fitting 65 and a lock pin 66 for opening and closing the open end of the U-shaped fitting 65. The lock pin 66 has a configuration similar to that of the upper line holding member 4, and is selectively positioned between a closed position and an open position by operating the operation ring 67.
[0027]
Next, a method of using the above-mentioned bypass cable holder 52 will be described. As shown in FIG. 5, when performing the cutting work for connecting the bypass lines 57 and 58 such as cable lines to the existing overhead lines S <b> 1 to S <b> 3 held in a state of being widened at a predetermined interval, the bypass line holding is performed. The tool 52 is fixedly attached to the catenary widening tool main body 1 in a relative arrangement protruding laterally (in this case, the horizontal direction) with respect to the main body rod 2 by gripping the main body rod 2 with the mounting portion 54. After the bypass wires 57 and 58 to be connected are inserted into the U-shaped bracket 65 of the bypass wire holder 52 attached in this manner, the lock pins 66 are displaced to the closed position, whereby the bypass wires 57 and 58 are displaced. Is held in the bypass line holding section 59 in a state where it cannot be removed. Further, portions of the bypass lines 57 and 58 below the bypass line holding portion 59 are suspended in a state where the bypass lines 57 and 58 are bundled with a suspension string 68 tied to the hook portion 42. Thus, even when the hot stick method is used for the cutting work, the bypass lines 57 and 58 are held at positions that are laterally separated from the existing overhead lines S1 to S3. There is no danger of short circuit due to contact with S3. Therefore, the bypass lines 57 and 58 are connected to the existing overhead lines S1 and S2 with extremely good workability.
[0028]
【The invention's effect】
As described above, according to the overhead wire enlarging device of the present invention, a simple configuration in which the center line gripping member is attached to the center of one main body rod, and the external line gripping member or the external line holding member is attached to both ends, respectively. Since the three gripping members or the holding members are provided at positions corresponding to the intervals at which the existing overhead wire is to be widened, complicated bevel gears, screw rods, and combinations of a mantle tube and an intubation tube are required. The need for a telescopic mechanism having a configuration is eliminated, and a significant cost reduction can be achieved. In addition, this overhead wire widening device has an advantage that it is possible to widen the space between the three existing overhead wires even if the existing overhead wires are wired in any of the horizontal direction and the vertical direction. In addition, since there is no telescopic mechanism, there is no need to perform a rotating operation using a wrench for remote control or the like. , The working time can be greatly reduced.
[Brief description of the drawings]
FIGS. 1A and 1B are a partially cutaway front view and a partially cutaway side view showing a catenary wire widening device main body in an overhead wire widening device according to one embodiment of the present invention.
FIG. 2 is an enlarged front view showing the upper line holding member of the overhead wire enlarging tool main body, partially broken away.
FIG. 3 is an explanatory view showing an overhead line widening holding method using the above overhead line widening tool main body.
FIG. 4 is a plan view showing a bypass line holding tool in the overhead wire widening tool according to the embodiment.
FIG. 5 is a partially cutaway front view of a process of performing the overhead wire line widening holding method using the above-described bypass line holding tool.
[Explanation of symbols]
2 Body rod 3 Middle line gripping member 4 Upper line holding member (outer line holding member)
7 Underline gripping member (external line gripping member)
41 Hook locking part (engaging part)
S1-S3 Existing overhead line

Claims (2)

In an overhead wire widening tool for widening a mutual interval between three existing overhead wires that are parallel to each other,
At a substantially central portion of one main rod, a middle wire gripping member that grips a middle overhead wire of the three overhead wires is rotatably attached,
At least one of two portions of the main body rod, which are separated from each other by a distance corresponding to an interval to widen the overhead wire with respect to the center wire gripping member on both ends of the main body rod, the gripping state of the overhead wire from a holding state by an external operation. An external wire gripping member is attached, and on the other hand, an external wire holding member or an external wire holding member that holds an overhead wire that is brought into a gripping state from a holding state to the overhead wire by an external operation is attached,
An overhead wire widening tool, wherein an engagement portion with which a remote control tool is detachably engaged is provided at one end of the main body rod. The middle wire gripping member according to claim 1, wherein the middle wire gripping member is attached to a middle wire of the three existing wires that are parallel to each other and is supported by being gripped by the wire,
By rotating the main body rod around the center line gripping member rotatably attached to the main rod, the outer line gripping member at one end of the main body rod and the outer line gripping member or the outer line holding member at the other end are moved outward. Is engaged with each of the two overhead wires in a holding state,
After the remote control tool is engaged with the engaging portion at one end of the main body rod, the main body rod is turned by the pulling operation or the pressing operation of the remote control tool until the relative position is substantially perpendicular to the three overhead lines. Moving, the two overhead wires on both sides are widened in the direction away from the middle overhead wire,
An overhead wire widening holding device using an overhead wire widening tool, wherein the at least one external gripping member is externally operated and the overhead wire is gripped by the external gripping member to hold the three overhead wires in a widened state. Construction method.

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