JP5281490B2 - Overhead wire widening tool and overhead wire widening holding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aerial wire spacing widening tool which is simply constituted and yet widens the spacing between three parallel aerial wires stably with good workability. <P>SOLUTION: In the aerial wire spacing widening tool 1 for widening the mutual spacing of three existing aerial wires 2a-2c parallel with one another, aerial wire gripping means 4 and 5 for gripping the aerial wires 2a and 2b are provided rotatably at one end of one body rod 3 and substantially in the center thereof, a bending portion 10 which extends or bends the body rod 3 between the state where one end side 3a of the body rod 3 is linked rotatably and the body rod 3 is extended in the shape of straight line and the state where one end side of the body rod is bent, is provided in the intermediate position of both aerial wire gripping means 4 and 5 of the body rod 3, and a movable holding means 14 for holding the aerial wire 2c relatively movably is provided rotatably at the other end of the body rod 3, along with an engaging portion 20 with which the end of a remote operating tool for moving the other end of the body rod 3 is engaged. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an overhead wire widening tool that widens and holds a mutual space between three overhead wires, for example, when performing wiring cutting work on three overhead wires laid in parallel to each other, and this It is related with the overhead wire widening holding | maintenance method of expanding and holding an overhead wire using.

  When cutting work to connect a bypass cable line, etc. to three overhead wires laid in parallel to each other, if the work is done with the power supply circuit at the wiring location where the cutting work is cut off, Because a power outage affects a wide range of power consumers, a method of wiring while operating remotely with a remote control tool having high insulation in a live state where power is supplied to the overhead wire (hereinafter referred to as a hot stick method) Is preferably adopted. In order to employ this hot stick method, it is necessary to widen the interval between the three overhead wires wired at a relatively narrow interval so that the cutting tool can be easily attached and detached.

  An overhead wire gripping means for gripping a central overhead wire at a substantially central portion of one main body rod as a conventional overhead wire widening tool for widening the interval between three overhead wires laid in parallel in a vertical plane or a horizontal plane. Are attached to the both ends of the main body rod at a distance corresponding to the distance at which the overhead wire should be widened from the arrangement position of the overhead wire gripping means. An overhead wire holding and gripping switching means capable of switching between a state of holding the overhead wire so as to be relatively movable and a gripping state is rotatably attached around an axis parallel to the rotational axis of the overhead wire gripping means, and is attached to one end of the body rod. There has been known one provided with an engaging portion for engaging a remote control tool to rotate a main body rod (for example, see Patent Document 1).

  When this overhead wire widening tool is used, the central wire is gripped by the overhead wire gripping means at the center of the main body rod, and the main body rod is placed in an oblique posture with respect to the overhead wire, and the outer wire holding grip switching means at both ends are respectively connected to the outside. The overhead wire is held in a relatively movable state, and then the remote control tool is engaged with the engaging portion, and the main body rod is rotated around the overhead wire gripping means to rotate the main body rod with respect to the central overhead wire. With the substantially vertical posture, the distance between the central overhead line and the outer overhead line can be widened to secure a desired distance, and in that state, the overhead wire holding grip switching means is switched to the overhead wire gripping state. Thus, the overhead wires can be stably held at a desired interval. In addition, it has a simple configuration in which an overhead wire gripping means is provided at the center of the main body rod, and an overhead wire holding grip switching means is provided at both ends, and a telescopic mechanism is provided on the main body rod to widen the distance between the overhead wires. Therefore, it can be configured at low cost, and high workability can be ensured because it is not necessary to perform a time-consuming expansion / contraction operation.

JP 2004-15877 A

  However, in the conventional overhead wire widening tool described above, when the remote control tool is engaged with the engaging portion and the body rod is rotated about the overhead wire gripping means at the center of the body rod, it is rotated to a vertical posture. If the body rod does not move or rotates too much beyond the vertical posture, the tension of the outer overhead wire causes the body rod to be urged to rotate in a direction away from the substantially vertical posture with respect to the central overhead wire. Therefore, it is not easy to stop the main body rod in a substantially vertical posture with respect to the central overhead wire, and it is necessary for a skilled worker to work carefully, resulting in poor workability.

  An object of the present invention is to provide an overhead wire widening tool and an overhead wire widening holding method capable of widening the interval between three parallel overhead wires with a simple configuration and good workability, in view of the above conventional problems. And

  The overhead wire widening tool of the present invention is an overhead wire widening tool that widens the interval between three parallel wires that are parallel to each other, and the overhead wire gripping means that grips the overhead wire at one end and substantially the center of one body rod. Is provided so as to be rotatable about a rotation axis perpendicular to the axis of the main body rod, and at one end side of the main body rod around an axis parallel to the rotation axis, at an intermediate position between the two body wire gripping means of the main body rod The other end of the main body rod is provided with a bending portion that can be extended and bent between the state where the main body rod is extended in a straight line and the state where one end of the main body rod is bent. In addition, movable holding means for holding the overhead wire so as to be relatively movable is provided so as to be rotatable around an axis parallel to the rotation axis, and the tip of a remote operation tool for moving the other end of the main body rod is engaged. An engaging portion is provided.

  According to this configuration, with the one end side of the main body rod bent, the central wire is gripped by the overhead wire gripping means in the substantially central portion of the main body rod, and the main body rod is inclined with respect to the overhead wire, and the other end portion The movable holding means is engaged with one of the outer wires, the overhead wire widening tool is attached to the overhead wire, and then one end side of the main body rod is rotated and the other outer overhead wire is moved by the overhead wire gripping means at one end. The position of the remote control tool is engaged with the engaging portion of the other end portion of the main body rod, and the other end portion of the main body rod is gripped. , And the main body rod is rotated so as to be in a substantially vertical posture with respect to the overhead wire, so that the overhead wire is gripped by the overhead wire gripping means at the intermediate portion and one end portion of the main body rod. The intermediate bending of these overhead wire gripping means as it turns There one end of the extended body rod becomes straight to the other part, their spacing is widened in both outer sides of the overhead wire is pushed open against the center of the contact wire. Thus, a simple configuration in which the overhead wire gripping means is provided at the center and one end of one main body rod, the bending portion is provided at an intermediate position between them, and the movable holding means and the engaging portion are provided at the other end. Therefore, it can be constructed at low cost, and the two overhead wires are gripped by the two overhead wire gripping means at the one end portion and the substantially central portion. The interval between the overhead wires can be surely widened, and workability can be improved.

  In addition, when the movable holding means at the other end of the main body rod is provided with a gripping means for gripping the overhead wire, the widened state is stably held by gripping each of the three overhead wires with the gripping means in a widened state. be able to.

  Moreover, when the pivot shaft of the bent portion that rotatably supports one end side of the main body rod is disposed on the side portion of the main body rod that is eccentric with respect to the axis of the main body rod, the main body rod extends in a straight line. In this state, even if a compressive force is applied from both ends of the main body rod due to the tension of the outer overhead wire, it does not act to bend and maintain the extension state of the main body rod. Stabilization of the extended state can be achieved.

  In addition, the bending portion is provided with an engaging means that engages with one end side of the main body rod so that the one end side of the main body rod does not close from a posture in which the one end side of the main body rod is parallel to another portion to a posture in which the main body rod is paralleled from a position opened at an appropriate angle. And before holding the central overhead wire by the overhead wire gripping means at the central portion of the main body rod, the one end side of the main body rod is opened to some extent by the engaging means in advance, and then the overhead wire at one end portion of the main body rod When the gripping means is moved toward one outside overhead wire, one end side of the main body rod can be easily rotated with respect to the other part, and workability can be improved.

  Also, if the bent portion is provided with a locking means for locking the main body rod in a straight line, the three overhead wires can be locked by the locking means in the extended state of the main body rod. The widened state can be secured more stably, and the subsequent cutting work can be performed more safely.

  Moreover, the overhead wire widening holding method of the present invention is an overhead wire widening holding method for widening the interval between three parallel wires parallel to each other using the overhead wire widening tool, wherein one end side of the main body rod is a bent portion. In the bent state, a step of gripping the intermediate overhead wire by the overhead wire gripping means at the center of the main body rod, the main body rod is inclined with respect to the overhead wire, and the movable holding means at the other end of the main body rod Engaging with the overhead wire, opening the one end side of the main body rod from the bent state, and gripping a position facing the gripping position of the intermediate overhead wire in the other outer overhead wire with the overhead wire gripping means at one end portion; Engaging the tip of the remote control tool with the engaging part at the other end of the main body rod, moving the other end of the main body rod, and extending the main body rod in a straight line; Grip the overhead wire with the gripping means at the end And a step.

  According to this configuration, the overhead wire is gripped by the intermediate wire gripping means at the intermediate portion and one end portion of the main body rod, and the overhead wire is held in a relatively movable manner by the movable holding means at the other end portion. By rotating the body rod by moving the end, the bent part of the body rod is extended so that one end side of the body rod is straight with respect to the other part, Since the overhead wires are pushed and widened, the interval between them is widened, so that the interval between the three overhead wires can be reliably widened with good workability using a simple and inexpensive construction of the overhead wire widening tool.

  According to the overhead wire widening tool and the overhead wire widening holding method of the present invention, the overhead wire gripping means is disposed at the central portion and one end portion of one main body rod, the bending portion is provided at an intermediate position between them, and the other end portion is movable. Since the holding means and the engaging portion are arranged in a simple configuration, the construction can be made at low cost, and the two overhead wires are gripped by the two overhead wire gripping means at the one end and the substantially central portion. By simply moving the end portion, the interval between the three overhead wires can be surely widened and workability can be improved.

An embodiment of the overhead wire widening tool of the present invention is shown, (a) is a side view with a part broken in the longitudinal direction, (b) is a front view of the same. The perspective view which shows the state which hold | maintained the one end side of the main body rod in the straight line shape in the bending part of the embodiment. The perspective view which shows the state which restricted the one end side of the main body rod to the position opened a little in the bending part of the embodiment. The state which folded the one end side of the main body rod of the embodiment is shown, (a) is the side view which fractured | ruptured and showed a part in the longitudinal direction, (b) is the perspective view which expanded and showed the bending part. The front view which shows the state which attached the overhead wire widening tool in order to widen an overhead wire space | interval using the overhead wire widening tool of the embodiment. The front view which shows the process in the middle of widening an overhead wire space | interval using the overhead wire widening tool of the embodiment. The front view which shows the state which expanded the space | interval of an overhead wire using the overhead wire widening tool of the embodiment. The perspective view which shows the bending part of other embodiment. The partial cross section side view which shows the engagement pin in the bending part of the embodiment. The partial cross section front view which shows the state which bent the one end side of the main body rod in parallel with the other part in the bending part of the embodiment. The partial cross section front view which shows the state which restricted the one end side of the main body rod to the position slightly opened in the bending part of the embodiment.

  Hereinafter, an embodiment of an overhead wire widening tool of the present invention and an overhead wire widening holding method using the same will be described with reference to FIGS.

  In FIG. 1 to FIG. 4, reference numeral 1 denotes an overhead wire widening tool that is used to widen the interval between three existing overhead wires 2 a, 2 b, 2 c that are parallel to each other, and one end of one main body rod 3 The overhead wire gripping means 4 and 5 are respectively attached to the substantially central part. The overhead wire gripping means 4 and 5 are substantially C-shaped, and receive and hold the overhead wires 2a and 2b in the overhead wire receiving portion 6a at one end thereof, and the other end portion of the receiving member 6 is threaded. In addition, the pressing screw shaft 7 having the overhead wire pressing portion 7a at the tip and the rotation operation ring 7b at the other end, and the receiving member 6 are connected to the body rod 3 on the axis of the body rod 3 and the overhead wires 2a and 2b. On the other hand, it is composed of a rotating support shaft 8 that is rotatably mounted around a vertical axis.

  The main body rod 3 is divided into two at one end side 3a and the other portion 3b at an intermediate position between the mounting positions of the two overhead wire gripping means 4 and 5, and at the bent portion 10 disposed at the divided portion. The one end side 3a extends straight with respect to the other portion 3b as shown in FIGS. 1 and 2, and the one end side 3a is a side portion of the other portion 3b as shown in FIGS. Are connected to each other so as to be able to extend and bend. The bent portion 10 is mounted and fixed to the connecting end portion of the other portion 3b, and the shape seen from the axial direction surrounds three sides of the main body rod 3 and protrudes to the side portion of the main body rod 3. A U-shaped connecting bracket 11 having 11a, and a protruding portion 12a that is mounted and fixed to the connecting end portion of the one end side 3a and that is partially fitted into the connecting bracket 11 and protrudes to the side portion of the body rod 3. And a pivot shaft 13 that pivotally connects the connecting block 12 to the connecting bracket 11 through the protruding end portion 11a of the connecting bracket 11 and the protruding portion 12a of the connecting block 12. The axis of the pivot shaft 13 is parallel to the rotation shaft 8.

  At the other end of the main body rod 3, a movable holding means 14 that holds the overhead wire 2 c so as to be relatively movable is attached to be rotatable around a rotation support shaft 15 parallel to the rotation support shaft 8. The movable holding means 14 has a drum-like shape in which a U-shaped movable bracket 16 opened to the other end side of the main body rod 3 is rotatably attached to the rotary support shaft 15 and the overhead wire 2c is engaged relatively freely. A holding roller 17 is rotatably supported by the movable bracket 16. An L-shaped attachment member 18 extends obliquely outward from the movable bracket 16 toward the other end of the main body rod 3, and passes through a boss portion 18 a provided at a bent portion at the tip of the attachment member 18. A press screw shaft 19 having an overhead wire pressing portion 19a at the tip and a rotation operation ring 19b at the other end is screwed. The overhead wire 2c can be gripped between the overhead wire pressing portion 19a and the holding roller 17, and the holding roller 17 and the pressing screw shaft 19 constitute a gripping means 20 for the overhead wire 2c.

  Engaging portions 21 are provided on both sides of the other end of the main body rod 3 to engage the tip of a remote control tool (not shown) for moving the other end of the main body rod 3. The other end of the main body rod 3 is provided with a hook 22 for hanging a hanging string (not shown) for hanging and supporting the lead wire. The retaining hook 22 is provided with an operating ring 22b that is urged and disposed in a direction in which a drop-off preventing piece 22a of a hanging string (not shown) is closed and that operates in a direction to open the drop-off preventing piece 22a. It has been.

  As shown in FIGS. 1 and 2, the bent portion 10 is provided with locking means 23 that locks the one end side 3 a of the main body rod 3 and the other portion 3 b in a state of extending in a straight line. As shown in FIGS. 2 to 4, the locking means 23 is formed in a portion of the connecting block 12 that fits in the connecting bracket 11 when the one end side 3 a side of the main body rod 3 extends straight. The locking hole 24 is constituted by a locking pin 25 disposed on the coupling bracket 11 so as to be able to be withdrawn and retracted between a position where the locking hole 24 is inserted and a position where the locking hole 24 is extracted. An operation ring 25a for exiting and retracting with a remote operation tool is provided.

  Further, as shown in FIG. 3, the bent portion 10 includes a state in which one end side 3 a of the main body rod 3 is parallel to the other portion 3 b and the one end side 3 a is opened at an appropriate angle from the state shown in FIG. 4. Engaging means 26 for engaging with the connecting block 12 on the one end side 3a of the main body rod 3 is provided so as not to close toward the parallel posture shown in FIG. The engaging means 26 is inserted into the connecting bracket 11 as shown in FIGS. 2 and 3, and is engaged with the connecting block 12. As shown in FIG. 4, the engaging means 26 is pulled out from the connecting bracket 11 and connected to the connecting block. 12 is configured with an engagement pin 27 disposed on the connection bracket 11 so as to be able to be withdrawn and retracted from a position not engaged with the engagement pin 12, and the engagement pin 27 is provided with an operation knob 27a for the withdrawal operation. Yes.

  The main body rod 3 is made of a pipe material having a thickness of 2 mm or more made of, for example, epoxy resin reinforced plastic (FRP), which has high electrical insulation, low hygroscopicity, and strength. Further, a rain drainer 28 for work in rainy weather is provided at a position below the overhead wire gripping means 4 and 5 and the movable holding means 14.

  Next, an operation process for widening the interval between the three parallel overhead wires 2a to 2c using the overhead wire widening tool 1 having the above configuration will be described with reference to FIGS. First, the one end side 3 of the main body rod 3 is bent at the bent portion 10, and the one end side 3a is opened at an appropriate angle from the posture shown in FIG. 4 in parallel with the other portion 3b, and the engagement means 26 is engaged. As shown in FIG. 3, the coupling pin 27 is set in an inserted state, and is set in a state in which it does not close toward the parallel posture shown in FIG. The overhead wire widening tool 1 in that state is arranged with a remote control tool (not shown) at a location where the interval between the overhead wires 2a to 2c is to be widened in order to perform the cutting work, as shown in FIG. The intermediate overhead wire 2 b is gripped by the overhead wire gripping means 5 at the center of the main body rod 3. In that case, after inserting and holding the overhead wire 2b in the overhead wire receiving portion 6a of the receiving member 6, the overhead screw receiving portion 6a is operated by rotating the pressing screw shaft 7 with a remote control tool (not shown). And the overhead wire pressing part 7a.

  Next, the main body rod 3 is inclined with respect to the overhead wires 2a to 2c, and the movable holding means 14 at the other end of the main body rod 3 is engaged with the lower overhead wire 2c. At that time, the overhead wire 2 c is engaged with the holding roller 17 that is rotatably supported by the movable bracket 16. Next, as shown in FIG. 6, the one end side 3 a of the main body rod 3 is opened from the bent state, and the upper overhead wire 2 a is gripped by the overhead wire gripping means 4 at one end portion of the main body rod 3. The gripping position of the overhead wire 2a by the overhead wire gripping means 4 is a position opposite to the gripping position of the overhead wire 2b by the overhead wire gripping means 5, and the gripping operation is the same as that of the overhead wire gripping means 5.

  Thereafter, the distal end of a remote control tool (not shown) is engaged with the engagement portion 21 at the other end of the main body rod 3, and the other end of the main body rod 3 is moved as shown by a dashed line arrow in FIG. 6. The main body rod 3 is moved and operated so as to be in a vertical posture with respect to the overhead wires 2a to 2c. Then, since the overhead wire gripping means 4 and 5 are held and fixed at positions where the overhead wires 2a and 2b face each other, the other portion 3b of the main body rod 3 becomes perpendicular to the overhead wire 2b. The one end side 3a is also rotated perpendicularly to the overhead wire 2a via the bent portion 10, and the one end side 3a extends in a straight line with respect to the other portion 3b as shown in FIG. At the same time, the distance between the overhead lines 2a, 2b, 2b, 2c is widened. Thereafter, the pressing screw shaft 19 of the gripping means 20 at the other end of the body rod 3 is rotated to grip the overhead wire 2c, and the locking pin 25 of the locking means 23 is inserted into the locking hole 24 to insert the body rod. Fix 3 in the extended state.

  Thus, in the state which expanded the space | interval of the overhead wires 2a-2c with the overhead wire widening tool 1, the cutting work which connects a bypass cable line etc. to the three overhead wires 2a-2c is implemented. At that time, it is possible to work safely and with good workability while applying a hot stick method in which the power is supplied to the overhead wires 2a to 2c and remotely operated by an insulated remote control tool.

  When the predetermined work of the cutting work is completed, the gripping means 20 is released from the gripping means 2 and the movable holding means 14 is moved relative to the gripping means 20, and the locking pin 27 is pulled out. 7 so that the main body rod 3 can be bent at the bent portion 10 and the main body rod 3 is rotated in the reverse direction to return the state of FIG. 7 to the state of FIG. The holding of the overhead wire 2a by the overhead wire gripping means 4 is released, the one end side 3a is rotated by the bent portion 10 to be in the bent state shown in FIG. 5, and then the engagement of the movable holding means 14 to the overhead wire 2c is released. 4 (a), by releasing gripping of the overhead wire 2b by the overhead wire gripping means 5, removing the overhead wire widening tool 1 and lowering it to the ground, and then pulling out the engaging pin 27 as shown in FIG. 4 (b). As shown in FIG. By folding the side 3a of the state along the sides of the other portions 3b, it can be carried accommodated in such a tool bag in a compact state.

  According to the overhead wire widening tool 1 of this embodiment as described above, the overhead wire gripping means 4 and 5 are disposed at the central portion and one end portion of the single body rod 3, and the bent portion 10 is provided at an intermediate position between them. Since the movable holding means 14 and the engaging part 21 are arranged at the end, the structure can be manufactured at low cost, and the two overhead wire gripping means 4 and 5 at the one end and the substantially central part can be used. By gripping the two overhead wires 2a and 2b, the distance between the three overhead wires 2a to 2c can be surely widened by simply moving the other end of the main body rod 3, thereby improving workability. can do.

  Further, since the movable holding means 14 at the other end of the main body rod 3 is provided with the gripping means 20 for gripping the overhead wire 2c, the overhead wire gripping means 4 in a state where the distance between the three overhead wires 2a to 2c is widened. 5 and the gripping means 20 can grip the overhead wires 2a to 2c to stably hold the widened state. Furthermore, the bending means 10 is provided with a locking means 23 that locks the main body rod 3 in a state of extending in a straight line, and the main body rod 3 is locked by the locking means 23 in the extended state. The widened state of the three overhead wires 2a to 2c can be secured more stably, and the subsequent cutting work can be performed more safely.

  Moreover, since the pivot shaft 13 of the bent portion 10 that rotatably supports the one end side 3a of the main body rod 3 is disposed on the side portion of the main body rod 3 that is eccentric with respect to the axis of the main body rod 3, When the main body rod 3 is extended in a straight line, even if a compressive force is applied from both ends of the main body rod 3 due to the tension of the outer overhead wires 2a and 2c in that state, the main body 3 is bent against the bending portion 14. Since it acts so as to maintain the extended state of the rod 3, it is possible to stabilize the extended state of the main body rod 3 during the operation of widening the overhead wires 2a to 2c.

  Further, the engaging means 26 that engages the connecting block 12 of the one end side 3a of the main body rod 3 at a position that is opened at an appropriate angle from the posture in which the one end side 3a of the main body rod 3 is parallel to the other portion 3b. The engagement pin 27 is provided so that one end side 3a of the main body rod 3 can be opened to some extent by the engagement pin 27 in advance before the overhead wire widening tool 1 is placed at the working position. After the central wire 2b is gripped by the overhead wire gripping means 5 at the center of the rod 3, one end of the body rod 3 is moved when the overhead wire gripping means 4 at one end of the body rod 3 is moved toward the outside overhead wire 2a. The side 3a can be easily rotated with respect to the other portion 3b, workability can be improved, and the engaging pin 27 is pulled out to the non-engaging position when stored, so that one end of the body rod 3 can be pulled out. Side 3a parallel to other part 3b It can be housed in a compact in the posture.

  The bent portion 10 can be configured as in the embodiment shown in FIGS. In this embodiment, like the bent portion 10 shown in FIGS. 2 to 4, the U-shaped connecting bracket 11 and the connecting end portion on the one end side 3 a are mounted and fixed, and a part thereof is inside the connecting bracket 11. The connecting block 12 is connected to the connecting block 12 through the protruding end portion 11 a of the connecting bracket 11 and the protruding portion 12 a of the connecting block 12. A pivot shaft 13 is rotatably connected to the bracket 11.

  The bent portion 10 is provided with a locking means 23 that locks the one end side 3a of the main body rod 3 and the other portion 3b in a state of extending in a straight line. This locking means 23 is a portion of the connecting block 12 that fits into the connecting bracket 11 when the one end 3a side of the main body rod 3 is extended in a straight line, similarly to the locking means shown in FIGS. And a locking pin 25 disposed on the connection bracket 11 so as to be able to be withdrawn and retracted between a position inserted into the locking hole 24 and a position where the locking hole 24 is extracted. The pin 25 is provided with an operation ring 25a for performing a withdrawal operation with a remote operation tool.

  Further, as shown in FIG. 11, the bent portion 10 has a state in which the one end side 3 a of the main body rod 3 is parallel to the other portion 3 b and the one end side 3 a is opened at an appropriate angle from the state shown in FIG. 10. Engaging means 26 for engaging with the connecting block 12 on the one end side 3a of the main body rod 3 is provided so as not to close toward the parallel posture shown in FIG. As shown in FIGS. 9, 10, and 11, the engaging means 26 includes an engaging pin 27 c that is rotatably supported on the boss portion 27 g of the connecting bracket 11. The cross-sectional shape of the shaft portion of the engagement pin 27c is a semicircle, and at the rotational position shown in FIG. 10, the notch plane 27e abuts on the engagement side 12b of the connecting block 12, and the one end 3a and the end The other portion 3b is in a parallel lower state, and at the rotational position shown in FIG. 11, the circumferential surface 27f abuts on the engagement side 12b of the connecting block 12, and the one end 3a and the other portion 3b is held at a position opened at an appropriate angle.

  The engagement pin 27c is provided with an operation knob 27d for rotating the engagement pin 27c, and a ball plunger 27x for holding the engagement pin 27c at the respective positions shown in FIGS. In order to lock the ball of the ball plunger 27x, two holes 27h and 27i formed at predetermined rotation positions are provided in the boss portion 27g.

  The overhead wire widening tool and the overhead wire widening holding method of the present invention are arranged such that an overhead wire gripping means is provided at the center and one end of one main body rod, a bent portion is provided at an intermediate position between them, and a movable holding means is provided at the other end. Since the engagement portion is arranged in a simple manner, the construction can be made at a low cost, and the other end of the main body rod can be held by gripping two overhead wires with two overhead wire gripping means at one end and a substantially central portion. By simply moving and moving, the interval between the three overhead wires can be widened reliably, and workability can be improved. For example, when performing wiring separation work on three existing overhead wires parallel to each other. In addition, it can be suitably applied to widen and hold the interval between the three overhead wires.

DESCRIPTION OF SYMBOLS 1 Overhead widening tool 2a-2c Overhead wire 3 Main body rod 3a One end side 3b Other parts 4 Overhead wire gripping means 5 Overhead wire gripping means 8 Rotating support shaft 10 Bending part 13 Pivoting shaft 14 Movable holding means 15 Rotating support shaft 20 Holding means 21 Engaging portion 23 Locking means 26 Engaging means

Claims (6)

An overhead wire widening tool that widens the interval between three parallel wires,
An overhead wire gripping means for gripping an overhead wire is provided at one end and substantially the center of one body rod so as to be rotatable around a rotation axis perpendicular to the axis of the body rod,
One end side of the main body rod is rotatably connected to an intermediate position between the two body wire gripping means of the main body rod around an axis parallel to the rotation axis, and the main body rod extends in a straight line and Provide a folding part that can be extended and bent between the state where one end is bent,
At the other end of the main body rod, a movable holding means for holding the overhead wire so as to be relatively movable is provided so as to be rotatable about an axis parallel to the rotation axis, and a remote operation tool for moving the other end of the main body rod. An overhead wire widening tool, characterized in that an engagement portion for engaging the tip of the wire is provided.   2. The overhead wire widening tool according to claim 1, wherein gripping means for gripping the overhead wire is provided in the movable holding means at the other end of the main body rod.   2. The overhead wire according to claim 1, wherein a pivot shaft of the bent portion that rotatably supports one end side of the main body rod is disposed on a side portion of the main body rod that is eccentric with respect to the axis of the main body rod. Widening tool.   Engagement means that engages one end of the main body rod at the bent portion so that it does not close from the position where one end of the main body rod is parallel to the other part to the position parallel to the position opened from an appropriate angle. The overhead wire widening tool according to claim 1.   2. The overhead wire widening tool according to claim 1, wherein the bent portion is provided with locking means for locking the main body rod in a state of extending in a straight line. An overhead wire widening holding method for widening the interval between three overhead wires parallel to each other using the overhead wire widening tool according to claim 1,
In a state where one end side of the main body rod is bent at the bent portion, a step of gripping an intermediate overhead wire by the overhead wire gripping means in the central portion of the main body rod;
Inclining the main body rod with respect to the overhead wire, and engaging the movable holding means at the other end of the main body rod with one outer overhead wire;
Opening from one end side of the main body rod bent and gripping a position facing the gripping position of the intermediate overhead wire in the other outside overhead wire with the overhead wire gripping means at one end; and
Engaging the tip of the remote control tool with the engagement portion of the other end of the main body rod, moving the other end of the main body rod, and extending the main body rod in a straight line; and
And a method of gripping the overhead wire with gripping means at the other end of the main body rod.

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