JP6660011B2 - Ground short-circuit device - Google Patents

Description

  The present invention relates to a ground short-circuit device. In particular, a ground short-circuiting device that is detachable with the tip of a common operation rod for indirect hot-line construction, and that operates the common operation rod to grip the electric wire from the outer peripheral direction and short-circuit the electric wire. The structure of the device.

  It is known that there are two types of live-line work for performing distribution work on high-voltage distribution lines without interruption, a direct live-line method and an indirect live-line method. In the direct hot-line construction method, workers wear protective equipment such as high-pressure rubber gloves and perform power distribution work by directly touching energized high-voltage distribution lines. On the other hand, in the indirect hot-line construction method, a worker can perform power distribution work using an insulating operation rod (hot stick) or the like without directly touching a high-voltage power distribution line that is energized.

  In general, the insulating operating rod is composed of a long operating rod and a power distribution work tool (hereinafter referred to as a “tip tool”) attached to the tip of the operating rod. The insulated operating rod is attached to the distal end of the insulated operating rod so that a tip tool corresponding to a work purpose can be replaced, such as holding or cutting a high-voltage distribution line.

  When performing power distribution work while the high-voltage distribution line is in a blackout state, use a grounding short-circuit device (earth hook) for indirect live-line work to prevent the electric shock from being improperly supplied to the high-voltage distribution line. Ground short circuit. Thereby, the safety of the worker can be ensured.

  For example, a grounding short-circuiting device for indirect hot-line construction has been disclosed which can be easily attached to an electric wire and which can clamp the electric wire with a sufficient force from the outer peripheral direction regardless of the skill level of an operator (eg, Patent Reference 1).

  The ground short-circuit device according to Patent Literature 1 includes a long insulating operating rod, a conductive block, and a bell crank-shaped ground hook. The insulated operation rod houses the operation rod therein so as to be movable in the axial direction. The conductive block is fixed to the tip of the insulating operation rod. In addition, the conductive block has a pair of first concave portions formed on the side surface that can freely contact the outer periphery of the electric wire. The ground hook has an intermediate portion rotatably connected to the tip of the conductive block. The ground hook has one end connected to the tip of the operating rod so that the other end can swing freely. Further, the ground hook has another piece which is arranged opposite to the first concave portion and has a second concave portion formed on the side surface so as to be able to contact the outer periphery of the electric wire.

  The ground short-circuit device according to Patent Document 1 can introduce an electric wire between the side surface of the conductive block and the other piece of the ground hook when the operation lever provided at the base end of the operation rod is pulled down, and the operation lever is moved upward. When the wire is pulled up, the electric wire can be held between the conductive block and the ground hook. The ground short-circuit device according to Patent Literature 1 states that the electric wire can be ground-short-circuited by embedding the other end of the ground wire having one end connected to the conductive block in the ground.

  Further, a ground short-circuiting device for indirect hot-line construction, in which the electric wire is inserted into the concave portion between the first swing arm and the second swing arm in a state where the electric wire is introduced from the outer circumferential direction into the concave portion formed on the side surface of the receiving bracket. It is disclosed (for example, see Patent Document 2).

  The ground short-circuit device according to Patent Document 2 includes an insulating operation rod and a box-shaped receiving member. The ground short-circuit device according to Patent Document 2 includes a first swing arm and a second swing arm. The insulated operation rod has a feed screw fixed coaxially to the tip thereof. The receiving fitting has a feed screw therein and is detachably and rotatably connected to a base end of the feed screw. Further, the receiving metal fitting has a concave portion formed on a side surface thereof, into which the electric wire can be introduced from the outer peripheral direction.

  The first swing arm is disposed above the receiving fitting. The tip of the first swing arm is branched into two branches. The second swing arm is arranged below the receiving fitting. The tip of the second swing arm can be introduced between the tips of the first swing arm. The feed screw has a first nut member disposed at an upper portion. In the feed screw, the second nut member is arranged at a lower portion.

  The first nut member is screwed to the feed screw. When the insulating operating rod is rotated in one direction, the first nut member can be moved upward. Then, the first swing arm can swing toward the recess. Similarly, the second nut member is screwed to the feed screw. When the insulating operating rod is rotated in one direction, the second nut member can be moved downward. Then, the second swing arm can swing toward the recess.

  When the insulated operating rod is rotated in the other direction, the first swing arm and the second swing arm can be opened to introduce the electric wire. When the insulating operation rod is rotated in one direction, the first swing arm and the second swing arm are closed with each other, and the wire can be gripped without falling off. The ground short-circuiting device according to Patent Literature 2 states that an electric wire can be grounded and short-circuited by embedding one end of a ground wire connected to a metal fitting to the other end of the ground wire.

  Further, there is disclosed a ground short-circuiting device for indirect hot-line construction capable of sandwiching both side surfaces of a strip-shaped conductive plate to which one end of an electric wire is connected (for example, see Patent Document 3).

  The ground short-circuiting device according to Patent Literature 3 includes an opening / closing mechanism including a cylindrical connection fitting and a plurality of links. The connection fitting can be attached to and detached from the tip of the common operation rod. A feed screw is coaxially fixed to the tip. When the common operation rod is rotated in one direction, the pair of chuck claws forming the opening / closing mechanism are closed with each other, and both side surfaces of the conductive plate can be held. When the common operation rod is rotated in the other direction, the pair of chuck claws can be opened to release the conductive plate.

  The ground short-circuit device according to Patent Literature 3 states that the conductive plate can be ground-short-circuited by embedding the other end of the ground wire having one end connected to one chuck claw in the ground.

JP 2010-35305 A JP-A-7-123552 JP-A-2002-152935

  The ground short-circuiting device according to Patent Literature 1 can easily pinch an electric wire by operating an operation lever. However, when the electric wire is short-circuited to the ground, a long insulating operating rod is hanging down from the electric wire. There is a problem that the load on the device is large. It is preferable that the ground short-circuit device is configured to be detachable from the insulating operation rod.

  In the earthing short-circuit device according to Patent Document 2, when the insulating operating rod is rotated in one direction around its axis, the first swing arm and the second swing arm are closed to each other, and the electric wire can be gripped without falling off. However, in the ground short-circuit device according to Patent Document 2, when the insulating operation rod is excessively rotated, the tightening force of the first swing arm and the second swing arm is increased, and there is a concern that the electric wire may be damaged. On the other hand, if the rotation speed of the insulating operating rod is insufficient, the tightening force of the first swing arm and the second swing arm becomes weak, and there is a concern that the contact force with the electric wire becomes insufficient. There is a need for a ground short-circuit device that can clamp an electric wire with a fixed tightening force.

  The ground short-circuiting device according to Patent Document 3 has a problem that the grounded object is limited to a strip-shaped conductive plate, and it is difficult to grip an electric wire having a substantially circular cross section. And the above may be said to be an object of the present invention.

  The present invention has been made in view of such problems, and it is an object of the present invention to provide a grounding short-circuiting device for indirect hot-line construction, which can be attached to and detached from a distal end portion of a common operation rod and can make a constant tightening force of an electric wire. Aim.

  The present inventors have a receiving metal fitting at a distal end for receiving an electric wire, a grounding short-circuiting device main body having a connecting metal connectable with a common operation rod at a base end, and a pair of grounding hooks freely engageable with the electric wire. The grounding short-circuit device is constituted by a conductive cylinder that is rotatably and movably connected to the body of the grounding short-circuiting device from the upper surface. Based on the assumption that the biasing member arranged inside can make the tightening force of the electric wire constant, based on this, the inventors have invented the following new grounding and short-circuiting device for indirect hot-line construction.

  (1) A ground short-circuiting device according to the present invention is a grounding short-circuiting device for short-circuiting an electric wire by using a long common operation rod which can interchangeably connect a tip tool having a different purpose to a tip portion. A substantially circular first fitting having a first receiving fitting at its distal end that is receivable from the lower surface side and a cylindrical first fitting that can be detachably connected to the distal end of the common operation rod at its proximal end. A cylindrical first grounding short-circuit device main body having a flange portion at an intermediate portion, and a shaft portion on a tip end side of the first grounding short-circuit device main body protruding from an upper surface, accommodating the first flange portion therein, (1) A cylindrical first conductive cylinder which is rotatably connected to the main body of the grounding short-circuiting device around its axis and is movable in the axial direction of the main body of the first grounding short-circuiting device, and an upper surface of the first conductive cylinder. A pair of hook-shaped first ground hooks projecting from A first biasing member that is disposed inside the first conductive cylinder and biases a force that abuts the first flange on the bottom surface of the first conductive cylinder; one end of the first biasing member; An earth wire connected to the outer periphery, the first flange portion has one or more protrusions protruding from the outer periphery thereof, and the first conductive cylinder body opens in a two-stage crank shape, The track has a track for guiding the protrusion on the outer circumference, and the track is configured such that the first flange portion is biased by the first biasing member, and the first ground hook is closest to the first receiving bracket. A starting end for stopping the projection, and being continuous with the starting end and formed parallel to the axial direction of the first conductive cylinder, resisting the urging force of the first urging member, the first ground hook and the first ground hook; A first linear trajectory for guiding the projection so that the electric wire can be held between the first receiving bracket and the first linear trajectory; And an intermediate track formed in an outer peripheral direction of the first conductive cylinder, and an intermediate track continuous with the intermediate track and formed in parallel with an axial direction of the first conductive cylinder, and provided with a first urging member. A second straight line that guides the projection in a state where the first ground hook and the first receiving bracket are separated so that an electric wire can be freely introduced between the first ground hook and the first receiving bracket against a force. The first ground hook is formed in the outer circumferential direction of the first conductive cylinder while being continuous with the track and the second linear track, and the first ground hook is configured to resist the urging force of the first urging member. And a terminal track that maintains the protrusion in a state most distant from the receiving fitting.

  (2) The common operation rod has a columnar shaft portion and one or more pins protruding in a centrifugal direction from an outer periphery of the shaft portion at a distal end portion, and the first connection fitting has an opening at a bottom surface. A first shaft hole that can be fitted to the shaft portion; and a first engagement groove cut out in an L shape from the bottom surface of the first connection fitting so as to be fitted to the pin. Is preferred.

  (3) a semicircular cover in which one piece is fixed to the outer periphery of the first conductive cylinder and the other piece is arranged close to the outer periphery of the first connection fitting, wherein the cover prevents the pins from entering; It is preferable that the other piece has an edge to be formed, and that the other piece has a cutout portion that does not hinder the movement of the pin when the protrusion is located at the start end of the track.

  (4) The grounding short-circuiting device according to the present invention is a grounding short-circuiting device for short-circuiting an electric wire using a long common operating rod which can exchangeably connect a tip tool having a different purpose to a distal end thereof. A substantially circular second connecting fitting having a second receiving fitting at its distal end that is receivable from the lower surface side and a cylindrical second connecting fitting that can be detachably connected to the distal end of the common operation rod. A cylindrical second grounding short-circuit device main body having a flange portion at an intermediate portion, and a shaft portion at a tip end side of the second grounding short-circuit device main body protruding from an upper surface, and accommodating the second flange portion therein; (2) A cylindrical second conductive cylinder that is rotatably connected to the main body of the grounding short-circuiting device around its axis and is movable in the axial direction of the main body of the second grounding shorting device, and an upper surface of the second conductive cylinder. A pair of hook-shaped second grounding hooks projecting from A second biasing member that is disposed inside the second conductive cylinder and biases a force that abuts the second flange on the bottom surface of the second conductive cylinder; one end of the second biasing member; An earth wire connected to an outer periphery, wherein the second grounding short-circuit device main body protrudes from the outer periphery, and extends in an axial direction from an upper surface of the second flange toward the second receiving bracket. The second conductive cylinder has a guide groove for guiding the protrusion, and the second conductive cylinder protrudes from the bottom surface of the second conductive cylinder. A restricting wall that allows rotation of the ridge in one direction and restricts rotation of the ridge in the other direction, wherein the ridge is guided by the guide groove, An electric wire standby state in which only the axial movement of the second conductive cylinder is permitted with respect to the second grounding short-circuit device main body, and the edge of the ridge is It comes into contact with the bottom surface of the second conductive cylindrical body, which is freely displaceable in a wire introduction ready to introduce the wire between the second receiving bracket and a pair of second ground hook.

  (5) The common operation rod has a cylindrical shaft portion and one or more pins protruding in a centrifugal direction from an outer periphery of the shaft portion at a distal end portion, and the second connection fitting has an opening at a bottom surface. A second shaft hole which can be freely fitted to the shaft portion; and a second engagement groove cut out in an L shape from the bottom surface of the second connection fitting so as to be freely fitted to the pin. Is preferred.

  The grounding short-circuiting device according to the present invention has a receiving fitting for receiving an electric wire at a distal end thereof, a grounding short-circuiting device main body having a connecting fitting freely connectable to a common operation rod at a base end thereof, and a pair of a grounding short-circuiting device capable of engaging with the electric wire. An earth hook is protruded from the upper surface, and a conductive cylinder body rotatably and movably connected to the ground short-circuiting device main body. The arranged urging member can make the tightening force of the electric wire constant.

It is a perspective view showing the composition of the grounding short circuit device by a 1st embodiment of the present invention. FIG. 2 is a perspective view showing a configuration of the ground short-circuiting device according to the first embodiment, and is a state diagram of the grounding short-circuiting device viewed from a different direction from FIG. 1. FIG. 2 is an exploded perspective view showing the configuration of the ground short-circuit device according to the first embodiment. It is a figure which shows the structure of the ground short-circuiting device by 1st Embodiment, FIG.4 (A) is a front view of a grounding short-circuiting device, FIG.4 (B) is a top view of a grounding short-circuiting device, FIG.4 (C). FIG. 4D is a left side view of the grounding short-circuit device. It is a front view showing composition by an example of a common operation stick. It is the perspective view which expanded the tool part provided in the front-end | tip part of the common operation rod. FIG. 7A is a front view showing the configuration of the ground short-circuiting device according to the first embodiment, FIG. 7A is a state diagram before the tool portion of the common operation rod is connected to the first connection fitting, and FIG. FIG. 7C shows a state in which the shaft portion of the tool portion of the common operation rod is inserted into the first shaft hole of the first connection fitting. FIG. 7C shows that the pin of the tool portion of the common operation rod has the first engagement of the first connection fitting. FIG. 7D is a state diagram in which the projection is moved from the start end of the track to the intermediate track from the state shown in FIG. 7C. FIG. 8A is a front view showing a configuration of the grounding short-circuit device according to the first embodiment, FIG. 8A is a state diagram in which a protrusion is moved from an intermediate track to a second straight track from the state shown in FIG. FIG. 8B is a diagram showing a state in which the protrusion has been moved from the intermediate track to the end of the second linear track from the state shown in FIG. 8A, and FIG. 8C is shown in FIG. 8B. FIG. 8D is a state diagram in which the protrusion is moved from the second straight track to the end of the track from the state, and FIG. 8D is a state diagram in which the electric wire is locked to the first ground hook in the state shown in FIG. is there. FIG. 9A is a front view showing the configuration of the grounding short-circuiting device according to the first embodiment. FIG. 9A shows a state in which the protrusion has been moved from the start end of the track to the end of the second straight track from the state shown in FIG. FIG. 9B is a state diagram in which the protrusion is moved from the end of the second linear trajectory to the intermediate trajectory from the state shown in FIG. 9A, and FIG. 9C is a state diagram in FIG. 9D is a state diagram in which the projection is moved from the intermediate trajectory to the first linear trajectory, and FIG. 9D is a state diagram in which the projection is moved from the state shown in FIG. 9C to the beginning of the trajectory. is there. It is a figure which shows the structure of the earthing | grounding short-circuiting device by 2nd Embodiment of this invention, FIG.10 (A) is a front view of the earthing | grounding short-circuiting device by 2nd Embodiment, FIG.10 (B) is by FIG. It is a top view of a ground short-circuit device. FIG. 11A is a front view illustrating a configuration of a grounding short-circuit device according to a second embodiment, and FIG. 11A is a guide groove in which a protrusion protruding from an outer periphery of a second grounding short-circuit device body is opened on an upper surface of a second conductive cylinder. 11 (B) is a state diagram in which the ridge has moved from the state shown in FIG. 11 (A) to the inside of the second conductive cylinder, and FIG. 11 (C) is a state diagram in FIG. FIG. 11D is a state diagram in which the ridge is turned from the state shown in FIG. B), and FIG. 11D is a state diagram in which the electric wire is gripped by the second receiving bracket and the second ground hook.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[First Embodiment]
(Configuration of grounding short-circuiting device)
First, the configuration of the ground short-circuit device according to the first embodiment of the present invention will be described.

  FIG. 1 is a perspective view showing a configuration of a ground short-circuit device according to a first embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of the grounding short-circuiting device according to the first embodiment, and is a state diagram when the grounding short-circuiting device is viewed from a different direction from FIG.

  FIG. 3 is an exploded perspective view showing the configuration of the ground short-circuit device according to the first embodiment. 4A and 4B are diagrams showing a configuration of the grounding short-circuiting device according to the first embodiment. FIG. 4A is a front view of the grounding short-circuiting device, FIG. FIG. 4C is a right side view of the ground short-circuit device, and FIG. 4D is a left side view of the ground short-circuit device.

(overall structure)
Referring to FIGS. 1 to 4, a grounding short-circuiting device 10 according to a first embodiment of the present invention includes a cylindrical first grounding short-circuiting device main body (hereinafter, simply referred to as a first main body) 1 and a cylindrical first conductive member. A cylinder 3 is provided. In addition, the ground short-circuiting device 10 includes a pair of hook-shaped first ground hooks 3f, 3f, a first compression coil spring 3s serving as a first biasing member, and a ground wire 3a. The ground short-circuiting device 10 can ground and short-circuit the electric wire W using a long common operation rod 9 that can exchangeably connect a tip tool having a different purpose to a tip portion (see FIG. 1).

  Referring to FIG. 1 to FIG. 4, the first main body 1 has a first receiving member 11 at a distal end portion. The first receiving fitting 11 can receive the electric wire from the lower surface side. The first main body 1 has a cylindrical first connection fitting 12 at a base end. The first connection fitting 12 can be detachably connected to the distal end of the common operation rod 9 (see FIG. 1). Further, the first main body 1 has a substantially circular first flange portion 13 at an intermediate portion (see FIG. 3 or FIG. 4 (D)).

  Referring to FIGS. 1 to 4, the first conductive cylinder 3 protrudes from the upper surface thereof a first shaft portion 11 s on the distal end side of the first main body 1 from the upper surface. In addition, the first conductive cylinder 3 houses the first flange portion 13 therein (see FIG. 3 or FIG. 4D). The first conductive cylinder 3 is connected to the first main body 1 so as to be rotatable around its axis. Further, the first conductive cylinder 3 is connected to the first main body 1 so as to be movable in the axial direction.

  With reference to FIGS. 1 to 4, the pair of first ground hooks 3 f project from the upper surface of the first conductive cylinder 3. The pair of first ground hooks 3f can lock the electric wire W from the upper surface side.

  Referring to FIG. 3 or FIG. 4 (D), the first conductive cylindrical body 3 further includes a ring member 3r whose bottom side can be closed. The ring member 3r has a male screw portion 31m formed on the outer periphery. On the other hand, the first conductive cylinder 3 has a female screw portion 31f formed on the inner wall. By screwing the male thread 31m into the female thread 31f, the ring member 3r can be fixed to the bottom of the first conductive cylinder 3.

  Referring to FIG. 3, the ring member 3r has a circular hole 31h opened at the center. The hole 31h can guide the second shaft portion 12s on the base end side of the first main body 1 rotatably and slidably.

  Referring to FIG. 3 or FIG. 4D, the first compression coil spring 3s is disposed inside the first conductive cylinder 3. The first compression coil spring 3s winds the second shaft portion 12s. Further, the first compression coil spring 3s is arranged between the first flange portion 13 and the ring member 3r. The first compression coil spring 3s urges the first flange 13 to contact the bottom surface of the first conductive cylinder 3.

  Referring to FIGS. 1 to 4, the ground wire 3a has a crimp terminal 32t crimped to one end. The crimp terminal 32t is screwed to the mounting bracket 321. The mounting bracket 321 can be detachably connected to the outer periphery of the first conductive cylinder 3. By burying the other end of the ground wire 3a in the ground, the electric wire W can be short-circuited to the ground via the first conductive cylinder 3.

  Referring to FIGS. 1 to 4, the first flange portion 13 has a pair of projections 13b projecting from the outer periphery thereof. On the other hand, the first conductive cylinder 3 has a track 33 on its outer periphery for guiding the projection 13b. The track 33 is open in a two-stage crank shape.

  Referring to FIGS. 1 to 4, the track 33 has a starting end 33 s and a first linear track 331 continuous with the starting end 33 s. The start end 33s stops the projection 13b in a state where the first flange portion 13 is urged by the first compression coil spring 3s and the first ground hook 3f comes closest to the first receiving member 11.

  Referring to FIGS. 1 to 4, the first linear track 331 is formed parallel to the axial direction of the first conductive cylinder 3. The first linear track 331 can guide the projection 13b in a state where the electric wire W can be held between the first ground hook 3f and the first receiving member 11 against the urging force of the first compression coil spring 3s (FIG. 9). (D)).

  1 or 4, the track 33 has a terminal track 33e and a second linear track 332 continuous with the terminal track 33e. The terminal track 33e is formed in the outer peripheral direction of the first conductive cylinder 3. The end track 33e can maintain the projection 13b in a state where the first ground hook 3f is farthest from the first receiving bracket 11 against the urging force of the first compression coil spring 3s.

  Referring to FIG. 1 or FIG. 4, the second linear track 332 is formed parallel to the axial direction of the first conductive cylinder 3. The second linear track 332 is configured to allow the electric wire W to be freely introduced between the first ground hook 3f and the first receiving bracket 11 against the urging force of the first compression coil spring 3s, so that the first ground hook 3f and the first ground hook 3f The protrusion 13b can be guided in a state where the receiving metal fitting 11 is separated (see FIG. 9A or FIG. 9B).

  Further, referring to FIGS. 1 to 4, the track 33 has an intermediate track 333. The intermediate track 333 is formed in the outer circumferential direction of the first conductive cylinder 3. The intermediate trajectory 333 is continuous with the first linear trajectory 331 and is continuous with the second linear trajectory 332.

  By operating the common operation rod 9 described later with reference to FIGS. 1 to 4, the projection 13b can move on the trajectory 33 from the start end 33s to the end trajectory 33e.

  Referring to FIGS. 1 to 4, a ground short-circuiting device 10 according to the first embodiment has a first receiving metal fitting 11 for receiving an electric wire W at a distal end, and a first connecting metal fitting 12 that can be connected to a common operation rod 9. And a pair of first ground hooks 3f, 3f, which can be locked to the electric wire W, protrude from the upper surface, and are connected to the first main body 1 so as to be rotatable and movable. The first compression coil spring 3 s disposed inside the first conductive cylinder 3 is provided in a state where the first receiving metal 11 and the pair of first ground hooks 3 f, 3 f grip the electric wire W. The fastening force of the electric wire W can be made constant.

(Configuration of the first grounding short-circuit device main body)
Next, the configuration of the first main body 1 according to the first embodiment will be described. Referring to FIGS. 1 to 4, the first main body 1 further includes a disk-shaped pedestal 11b. It is preferable to fix the first receiving member 11 from the bottom side of the pedestal 11b using a flathead screw or the like. Then, the pedestal 11b with the first receiving fitting 11 can be fixed to the top surface of the first shaft portion 11s using a flathead screw or the like. Thus, the first receiving member 11 can be detachably fixed to the first shaft portion 11s in a state where the first shaft portion 11s protrudes from the upper surface of the first conductive cylinder 3.

  Referring to FIG. 4, the second shaft portion 12s is preferably formed with a stepped portion 12d having a smaller diameter. Further, it is preferable that a hole 12h into which the stepped portion 12d is fitted is formed in the first connection fitting 12. By inserting the stepped portion 12d into the hole 12h and press-fitting the pin 12p in a state where the press-fitting hole provided in the stepped portion 12d and the press-fitting hole provided in the first connection fitting 12 are matched, the second shaft portion is formed. The first connection fitting 12 can be fixed to the base end of 12s. Thereby, the first connection fitting 12 can be fixed to the base end of the second shaft portion 12s with the second shaft portion 12s inserted through the ring member 3r.

(Configuration of the first connection fitting)
Next, the configuration of the first connection fitting 12 according to the first embodiment will be described. Referring to FIGS. 1 to 4, the first connection fitting 12 is formed in a cylindrical shape with an open bottom surface. A first shaft hole 12a into which a shaft portion 91a (see FIG. 6) of the common operation rod 9 described later is fitted is opened from the bottom surface of the first connection fitting 12. Further, the first connection fitting 12 has a pair of first engagement grooves 12b, 12b, which are cut out in an L-shape from the bottom surface, on the outer periphery.

  Referring to FIGS. 1 to 4, after inserting the shaft portion 91a (see FIG. 6) in the axial direction of the first shaft hole 12a, the pair of pins 91b and 91b are rotated in the circumferential direction of the first shaft hole 12a. By doing so, the pair of pins 91b can be engaged with the pair of first engagement grooves 12b. Such an engagement means is called a twist lock. Further, since the push rod 91c (see FIG. 6) presses the upper inner wall of the first shaft hole 12a inside the first shaft hole 12a, the common operation rod 9 is securely engaged with the first connection fitting 12. it can.

(Cover configuration)
Next, the configuration of the cover 5 according to the first embodiment will be described. Referring to FIG. 1 or FIG. 2 and FIG. 4, the ground short-circuit device 10 according to the first embodiment further includes a cover 5 having a semicircular shape. One piece 51 of the cover 5 can be fixed to the outer periphery of the first conductive cylinder 3 by using a screw or the like. The cover 5 can move integrally with the first conductive cylinder 3. In the cover 5, the other piece 52 is arranged near the outer periphery of the first connection fitting 12.

  Referring to FIG. 1 or FIG. 2 and FIG. 4, when the other piece 52 of the cover 5 covers one of the first engagement grooves 12b, the cover 5 is configured such that the edge 521 of the other piece 52 is It is configured to contact the outer periphery. This can prevent the pin 91b from entering the first connection fitting 12.

  On the other hand, with reference to FIG. 1 or FIG. 2 and FIG. 4, when the projection 13b is located at the start end 33s of the track 33, the cover 5 engages the notch 522 which does not hinder the movement of one pin 91b with the other. 52. Thereby, the common operation rod 9 can be attached to and detached from the first connection fitting 12 with the ground short-circuiting instrument 10 holding the electric wire W.

(Composition of common operation stick)
Next, a configuration of an example of the common operation rod will be described. FIG. 5 is a front view showing a configuration of an example of the common operation stick. FIG. 6 is an enlarged perspective view of a tool portion provided at a distal end portion of the common operation rod.

  Referring to FIG. 5, the common operation rod 9 includes a tool portion 91, a handle portion 92, and a grip portion 93. The tool part 91 is detachable with the first connection fitting 12 (see FIGS. 1 to 4). The grip portion 93 is provided with a non-slip so as to be easily gripped by an operator. The handle portion 92 connects the tool portion 91 and the grip portion 93, and is formed of a long tube having an insulating property.

  Referring to FIG. 5, a conical drainage flange 9 a is attached to an intermediate portion of the handle 92. The drainage flange 9a can block rainwater that has advanced from the tool part 91. A conical limit flange 9b is attached to the connection between the handle 92 and the grip 93. The mounting position of the limit flange 9b indicates a limit at which safe work can be performed in consideration of insulation properties.

  Referring to FIG. 5 or FIG. 6, the tool portion 91 includes a shaft portion 91a and a pair of pins 91b. The tool section 91 includes a push rod 91c and a push ring 91d. The shaft portion 91a projects in the axial direction of the handle portion 92. The pair of pins 91b project from the outer periphery of the shaft portion 91a in opposite directions. The push rod 91c is urged by a compression coil spring (not shown) built in the tool portion 91 so as to protrude from the distal end surface of the shaft portion 91a. The push ring 91d is arranged below the shaft portion 91a. The push ring 91d is biased by a compression coil spring (not shown) toward a shaft portion 91a.

  The long insulated operation rod shown in FIG. 7 or FIG. 8 is called a common operation rod because a tip tool having a different purpose can be interchangeably attached to the tool portion.

(Effect of ground shorting device)
Next, the operation and effects of the grounding short-circuiting device 10 will be described while describing the operation method of the grounding short-circuiting device 10 according to the first embodiment.

  FIG. 7 is a front view showing the configuration of the ground short-circuiting device according to the first embodiment, and FIG. 7A is a state diagram before the tool portion of the common operation rod is connected to the first connection fitting, and FIG. FIG. 7B is a diagram showing a state in which the shaft portion of the tool portion of the common operation rod is inserted into the first shaft hole of the first connection fitting. FIG. FIG. 7D is a state diagram in which the protrusion is moved from the start end of the track to the intermediate track from the state shown in FIG. 7C.

  FIG. 8 is a front view showing the configuration of the grounding short-circuit device according to the first embodiment, and FIG. 8 (A) moves the protrusion from the intermediate track to the second straight track from the state shown in FIG. 7 (D). FIG. 8B is a state diagram in which the protrusion is moved from the intermediate trajectory to the end of the second linear trajectory from the state shown in FIG. 8A, and FIG. FIG. 8D shows a state in which the protrusion is moved from the second straight track to the end of the track from the state shown in FIG. 8D. FIG. 8D shows the state shown in FIG. FIG.

  FIG. 9 is a front view showing the configuration of the ground short-circuiting device according to the first embodiment. FIG. 9 (A) shows a state in which the protrusion is moved from the start end of the track to the second straight track from the state shown in FIG. 8 (D). FIG. 9 (B) is a state diagram in which the protrusion has been moved from the end of the second linear trajectory to the intermediate trajectory from the state shown in FIG. 9 (A), and FIG. FIG. 9D is a state diagram in which the projection is moved from the intermediate track to the first straight path from the state shown in FIG. 9B, and FIG. 9D is a state in which the projection is moved from the state shown in FIG. FIG.

(Step 1)
First, referring to FIG. 7A, the tool portion 91 of the common operation rod 9 is moved toward the first connection fitting 12. In the grounding short-circuit device 10, the protrusion 13b is located at the start end 33s of the track 33. Next, referring to FIG. 7 (B), the pin 91b of the common operation rod 9 is advanced to the depth of the first engagement groove 12b.

(Step 2)
Next, from the state shown in FIG. 7B, the common operation rod 9 and the first connection fitting 12 are connected by rotating the common operation stick 9 in one direction with respect to the first connection fitting 12. (See FIG. 7C).

(Step 3)
Next, referring to FIG. 7C, the pin 91b can be moved to the end of the first engagement groove 12b by pulling down the common operation rod 9 with respect to the first connection fitting 12 (see FIG. 1). Thus, the common operation rod 9 and the first connection fitting 12 can be integrally rotated.

(Step 4)
Next, from the state shown in FIG. 7 (C), the first ground hook 3f and the first receiving member 11 can be separated from each other by pulling down the common operation rod 9 with respect to the first conductive cylinder 3 (FIG. 7). (D)). In the state shown in FIG. 7D, the projection 13b is guided by the first linear trajectory 331 and moves to the intermediate trajectory 333 (see FIG. 4A).

(Step 5)
Next, from the state shown in FIG. 7D, by rotating the common operation rod 9 in the other direction with respect to the first conductive cylinder 3, the protrusion 13 b is guided by the intermediate track 333. , To the second linear trajectory 332 (see FIG. 8A).

(Step 6)
Next, from the state shown in FIG. 8A, the first ground hook 3f and the first receiving bracket 11 can be separated most by pulling down the common operation rod 9 with respect to the first conductive cylinder 3 (FIG. 8A). 8 (B)). In the state shown in FIG. 8B, the protrusion 13b is guided by the second linear trajectory 332 and moves to the terminal trajectory 33e (see FIG. 4A).

(Step 7)
Next, from the state shown in FIG. 8B, the protrusion 13b can be moved to the terminal track 33e by rotating the common operation rod 9 in the other direction with respect to the first conductive cylinder 3 (FIG. 8 (C)). In the state shown in FIG. 8 (C), the first compression coil spring 3s urges the projection 13b into contact with the edge of the terminal track 33e, so that the first ground hook 3f and the first receiving bracket 11 are connected. The most distant state can be maintained. Then, the electric wire W can be introduced between the first ground hook 3f and the first receiving bracket 11 (see FIG. 8C).

(Step 8)
Next, from the state shown in FIG. 8C, the first operation hook 9 is operated to lock the first ground hook 3f to the electric wire W (see FIG. 8D).

(Step 9)
Next, from the state shown in FIG. 8D, the protrusion 13 b is moved toward the second linear track 332 by rotating the common operation rod 9 in one direction with respect to the first conductive cylinder 3. (See FIG. 9A). In this case, since the first ground hook 3f is locked to the electric wire W, the common operation rod 9 can be easily rotated in one direction with respect to the first conductive cylinder 3.

(Step 10)
Next, from the state shown in FIG. 9A, the first receiving bracket 11 can be moved toward the electric wire W by pushing up the common operation rod 9 with respect to the first conductive cylinder 3 (FIG. B)). In this case, since the first compression coil spring 3s is housed inside the first conductive cylinder 3, the first receiving member 11 can be easily moved toward the electric wire W. In the state shown in FIG. 9B, the projection 13b is guided by the second linear track 332 and reaches the intermediate track 333.

(Step 11)
Next, from the state shown in FIG. 9B, the projection 13b is moved toward the first linear track 331 by rotating the common operation rod 9 in one direction with respect to the first conductive cylinder 3. (See FIG. 9C). In the process from the state shown in FIG. 9 (B) to the state shown in FIG. 9 (C), since the pair of first ground hooks 3f, 3f are locked to the electric wire W, the first conductive cylinder 3 In contrast, the first main body 1 can be easily rotated.

(Step 12)
Next, from the state shown in FIG. 9 (C), the common operation rod 9 is pushed up against the first conductive cylinder 3, so that the electric wire is connected to the first receiving bracket 11 and the pair of first ground hooks 3 f. W can be clamped (see FIG. 9D). Next, the common operation rod 9 is pivoted in the other direction with respect to the first connection fitting 12, and the common operation rod 9 is pulled down with respect to the first connection fitting 12, so that the common operation rod 9 and the ground short-circuiting device 10 are connected. The connection of the rod 9 can be released.

  In the state shown in FIG. 9 (D), the first receiving metal 11 and the first receiving metal 11 are pressed by the urging force of the first compression coil spring 3 s housed inside the first conductive cylinder 3 (see FIG. 3 or FIG. 4 (D)). The pair of first ground hooks 3f, 3f hold the electric wire W at a constant pressure.

  Referring to FIGS. 1 to 9, the ground short-circuiting device 10 according to the first embodiment can be easily attached to and detached from the common operation rod 9, and the long insulating operation rod does not hang down from the electric wire. There is an advantage that the load on the device is small.

Referring to FIGS. 1 to 9, the ground short-circuiting device 10 according to the first embodiment uses the biasing force of the first compression coil spring 3 s housed inside the first conductive cylinder 3 (see FIG. 3 or FIG. D)), the first receiving member 11 and the pair of first ground hooks 3f, 3f have an effect that the electric wire W can be clamped at a constant pressure.
[Second embodiment]
(Configuration of grounding short-circuiting device)
Next, the configuration of a ground short-circuit device according to a second embodiment of the present invention will be described.

  FIG. 10 is a diagram showing a configuration of a ground short-circuit device according to a second embodiment of the present invention. FIG. 10 (A) is a front view of the ground short-circuit device according to the second embodiment, and FIG. It is a top view of a grounding short circuit device by two embodiments.

  FIG. 11 is a front view showing the configuration of the grounding short-circuit device according to the second embodiment, and FIG. 11 (A) shows a protrusion protruding from the outer periphery of the second grounding short-circuit device main body on the upper surface of the second conductive cylinder. FIG. 11 (B) is a state diagram in which the protrusion has been moved into the second conductive cylinder from the state shown in FIG. 11 (A), and FIG. 11 (B) is a state diagram in which the ridge is rotated from the state shown in FIG. 11 (B), and FIG. 11 (D) is a state diagram in which the electric wire is gripped by the second receiving bracket and the second ground hook.

(overall structure)
Referring to FIG. 10 or FIG. 11, a ground short-circuit device 20 according to a second embodiment of the present invention includes a cylindrical second ground short-circuit device main body (hereinafter abbreviated as a second main body) 2 and a cylindrical second conductive member. A cylinder 4 is provided. In addition, the ground short-circuiting device 20 includes a pair of hook-shaped second ground hooks 4f, 4f, a second compression coil spring 4s serving as a second biasing member, and a ground wire 4a. The ground short-circuiting device 20 can short-circuit the electric wire W to the ground using the long common operation rod 9 that can interchangeably connect a tip tool having a different purpose to a tip portion (see FIG. 5 or FIG. 6).

  Referring to FIG. 10 or FIG. 11, the second main body 2 has a second receiving member 21 at a distal end portion. The second receiving member 21 can receive the electric wire from the lower surface side. The second main body 2 has a cylindrical second connection fitting 22 at the base end. The second connection fitting 22 can be detachably connected to the distal end of the common operation rod 9 (see FIG. 5 or FIG. 6). Further, the second main body 2 has a substantially circular second flange portion 23 at an intermediate portion.

  Referring to FIG. 10 or FIG. 11, the second conductive cylinder 4 protrudes the third shaft portion 21 s on the tip end side of the second main body 2 from the upper surface from the upper surface. In addition, the second conductive cylinder 4 houses the second flange 23 inside (see FIG. 10). The second conductive cylinder 4 is connected to the second main body 2 so as to be rotatable around its axis. Further, the second conductive cylinder 4 is connected to the second main body 2 movably in the axial direction.

  Referring to FIG. 10 or FIG. 11, the pair of second ground hooks 4 f project from the upper surface of the second conductive cylinder 4. The pair of second ground hooks 4f can lock the electric wire W from the upper surface side (see FIG. 11D).

  Referring to FIG. 10 or FIG. 11, the second conductive cylinder 4 further includes a ring member 4r whose bottom side can be closed. The ring member 4r is fixed to the bottom of the second conductive cylinder 4 by screwing with the bottom of the second conductive cylinder 4.

  Referring to FIG. 10, the ring member 4r has a circular hole (not shown) opened at the center. This hole can guide the fourth shaft portion 22s on the base end side of the second main body 2 in a freely rotatable and slidable manner.

  Referring to FIG. 10 or FIG. 11, the second compression coil spring 4s is disposed inside the second conductive cylinder 4. The second compression coil spring 4s winds the fourth shaft portion 22s. Further, the second compression coil spring 4s is arranged between the second flange portion 23 and the ring member 4r. The second compression coil spring 4s urges the second flange 23 to contact the bottom surface of the second conductive cylinder 4.

  Referring to FIG. 10A, the ground wire 3a has a crimp terminal 32t crimped to one end. The crimp terminal 32t is screwed to the mounting bracket 321. The mounting bracket 321 can be detachably connected to the outer periphery of the second conductive cylinder 4. By burying the other end of the ground wire 3a in the ground, the electric wire W can be short-circuited to the ground via the second conductive cylinder 4.

  Referring to FIG. 10 or FIG. 11, the second main body 2 has a pair of protrusions 23b projecting from the outer periphery of the third shaft portion 21s. The pair of protrusions 23 b extends in the axial direction from the upper surface of the second flange 23 toward the second receiving member 21.

  On the other hand, referring to FIG. 10A, the second conductive cylinder 4 has a guide groove 43 for guiding the ridge 23b opened on the upper surface. The ridge 23b can pass through the guide groove 43 in the axial direction. Referring to FIG. 10A, the second conductive cylinder 4 has a regulating wall 44. The restriction wall 44 protrudes from the bottom surface of the second conductive cylinder 4. The restricting wall 44 allows the protrusion 23b to rotate in one direction and restricts the rotation of the protrusion 23b in the other direction.

  Referring to FIG. 11, the grounding short-circuiting device 20 according to the second embodiment uses the common operation rod 9 to perform an electric wire standby state (see FIG. 11B) and an electric wire introduction state (see FIG. 11C). , Can be displaced.

  Referring to FIG. 10 or FIG. 11B, in the electric wire standby state, the ridge 23 b is guided by the guide groove 43, and only the axial movement of the second conductive cylinder 4 with respect to the second main body 2 is allowed. Is done. On the other hand, referring to FIG. 11 (C), when the electric wire is introduced, the edge of the ridge 23b abuts on the bottom surface of the second conductive cylinder 4, and the second receiving member 21 and the pair of second ground hooks 4f. The electric wire W can be introduced between 4f.

(Configuration of the second grounding short-circuit device main body)
Next, the configuration of the second main body 2 according to the second embodiment will be described. Referring to FIG. 10, the second main body 2 further includes a disc-shaped pedestal 21b. It is preferable to fix the second receiving member 21 from the bottom side of the pedestal 21b using a flathead screw or the like. Then, the pedestal 21b with the second receiving fitting 21 can be fixed to the top surface of the third shaft portion 21s by using a flathead screw or the like. Thus, the second receiving member 21 can be detachably fixed to the third shaft portion 21s in a state where the third shaft portion 21s protrudes from the upper surface of the second conductive cylinder 4.

  Referring to FIGS. 1 to 4 and FIGS. 10 and 11, the first receiving member 11 and the second receiving member 21 are the same, but are distinguished by changing reference numerals for convenience of explanation.

  Referring to FIG. 10, the fourth shaft portion 22s is preferably formed with a stepped portion (not shown) having a reduced diameter. Further, it is preferable that a hole for fitting the stepped portion is formed in the second fitting 22. The stepped portion is inserted into the hole, and the pin 22p is press-fitted in a state where the press-fitting hole provided in the stepped portion and the press-fitting hole provided in the second connection fitting 22 are aligned with each other, so that the fourth shaft portion is formed. The second connection fitting 22 can be fixed to the base end of the 22s. Thereby, the second connection fitting 22 can be fixed to the base end of the fourth shaft portion 42s with the fourth shaft portion 22s inserted through the ring member 4r.

(Configuration of second connection fitting)
Next, the configuration of the second connection fitting 22 according to the second embodiment will be described. Referring to FIG. 10 or FIG. 11, the second connection fitting 22 is formed in a cylindrical shape with an open bottom surface. A second shaft hole 22a into which the shaft portion 91a (see FIG. 6) of the common operation rod 9 fits is opened from the bottom surface of the second connection fitting 22. Further, the second connection fitting 22 has a pair of second engagement grooves 22b, 22b, which are cut out in an L-shape from the bottom surface, on the outer periphery.

  Referring to FIG. 10 or 11, after the shaft portion 91a (see FIG. 6) is inserted in the axial direction of the second shaft hole 22a, the pair of pins 91b and 91b are rotated in the circumferential direction of the second shaft hole 22a. By doing so, the pair of pins 91b can be engaged with the pair of second engagement grooves 22b. In addition, since the push rod 91c (see FIG. 6) presses the upper inner wall of the second shaft hole 22a inside the second shaft hole 22a, the common operation rod 9 is securely engaged with the second connection fitting 22. it can. Although the first connection fittings 12 and the second connection fittings 22 are the same, they are distinguished by changing reference numerals for convenience of explanation.

(Effect of ground shorting device)
Next, the operation and effects of the grounding short-circuiting device 20 will be described while describing a method of operating the grounding short-circuiting device 20 according to the second embodiment.

(Step 1)
First, referring to FIG. 11A, the tool portion 91 of the common operation rod 9 is moved toward the second connection fitting 22. In the grounding short-circuit device 20, the protrusion 23b is inserted into the guide groove 43, and the rotation of the second main body 2 is restricted. Further, the second flange portion 23 is urged by the second compression coil spring 4s and is in contact with the bottom surface of the regulating wall 44. Next, from the state shown in FIG. 11A, the pin 91b of the common operation rod 9 is inserted into the second engagement groove 22b.

(Step 2)
Next, by rotating the common operation rod 9 in one direction with respect to the second connection fitting 22 from a state in which the pin 91b of the common operation rod 9 has entered the depth of the second engagement groove 22b, The common operation rod 9 and the second connection fitting 22 can be connected (see FIG. 11B).

(Step 3)
Next, referring to FIG. 11B, the pin 91b can be moved to the end of the second engagement groove 22b by pulling down the common operation rod 9 with respect to the second connection fitting 22 (FIG. 11A). )), The common operation rod 9 and the second connection fitting 22 can be integrally rotated.

(Step 4)
Next, by pulling down the common operation rod 9 with respect to the second conductive cylinder 4, the second ground hook 4f and the second receiving bracket 21 can be separated (see FIG. 11B). In the state shown in FIG. 11B, the protrusion 23b is guided by the guide groove 43 and moves into the second conductive cylinder 4 (see FIG. 11B).

(Step 5)
Next, from the state shown in FIG. 11B, by rotating the common operation rod 9 in one direction with respect to the second conductive cylinder 4, the ridges 23 b are moved to the second conductive cylinder 4. The second earth hook 4f and the second receiving member 21 can be maintained at the most separated state by being restricted by the upper inner wall. Then, the electric wire W can be introduced between the second ground hook 4f and the second receiving member 21 (see FIG. 11C).

(Step 6)
Next, from the state shown in FIG. 11C, by rotating the common operation rod 9 in the other direction with respect to the second conductive cylinder 4, the ridge 23 b can be brought into contact with the regulating wall 44. (See FIG. 11D). In this case, since the second ground hook 4f is locked to the electric wire W, the common operation rod 9 can be easily rotated in the other direction with respect to the second conductive cylinder 4.

(Step 7)
Next, by pushing up the common operation rod 9 with respect to the second conductive cylinder 4, the second receiving member 21 can be moved toward the electric wire W (see FIG. 11D). In this case, since the second compression coil spring 4s is accommodated inside the second conductive cylinder 4, the second receiving member 21 can be easily moved toward the electric wire W. In the state shown in FIG. 9B, the ridges 23 b are guided by the guide grooves 43 and protrude from the upper surface of the second conductive cylinder 4.

  In the state shown in FIG. 11 (D) and FIG. 9 (D), the urging force of the second compression coil spring 4s housed inside the second conductive tubular body 4 causes the second receiving member 21 and the pair of second ground hooks to move. 4f and 4f hold the electric wire W at a constant pressure.

(Step 8)
Next, the common operation rod 9 is rotated in the other direction with respect to the second connection fitting 22, and the common operation rod 9 is pulled down with respect to the second connection fitting 22, so that the common operation rod 9 is connected to the ground short-circuit device 20. The connection of the rod 9 can be released.

  Referring to FIG. 10 or FIG. 11, the ground short-circuiting device 20 according to the second embodiment has the same effect as the grounding short-circuiting device 10 according to the first embodiment, but has a special operation that the operation of the common operation rod 9 is simple. Has a significant effect. The ground short-circuiting device 20 according to the second embodiment can include the cover 5 used in the first embodiment.

The ground short-circuit device according to the present invention has the following effects.
(1) Insufficient contact with the electric wire is eliminated, and the safety of the worker can be ensured.
(2) By using a compression coil spring inside, attachment to an electric wire becomes easy.
(3) Since the existing insulating operation rod can be used, it is inexpensive.
(4) Since the insulated operation rod and the ground short-circuiting device can be separated, the storage space can be reduced.
(5) Even if it is installed inside the switchgear, the door can be closed and work can be performed safely and efficiently.
(6) The structure is such that the insulated operation rod comes off when the ground is securely attached and does not come off during the installation of the electric wire or when the ground is not installed.
(7) In order to attach the earth hook without loosening (without insufficient contact), depending on the type of electric wire, experience and knowledge were conventionally required. However, since the urging force of the compression coil spring clamps the electric wire, It can be easily and securely attached without any shortage.

  The present invention discloses an earthing short-circuiting device for indirect hot-line construction for grounding and short-circuiting a high-voltage distribution line in a blackout state using an insulating operation rod or the like. It is expected to be applied to other fields without limitation.

1 1st main body (1st grounding short-circuit device main body)
3 First conductive cylinder 3a Ground wire 3f · 3f A pair of first ground hooks 3s First compression coil spring (first biasing member)
9 common operation rod 10 ground short-circuiting device 11 first receiving bracket 12 first connecting bracket 13 first flange 13b projection 33 track 33e terminal track 33s start end 331 first straight track 332 second straight track 333 intermediate track

Claims (5)

A ground short-circuiting device that short-circuits an electric wire by using a long common operation rod that can connect a tip tool having a different purpose to a tip portion interchangeably.
A first receiving metal fitting at a distal end portion capable of receiving an electric wire from a lower surface side thereof; a cylindrical first connecting metal fitting at a base end portion detachably connectable to a distal end portion of the common operation rod; A first ground short-circuiting device main body having a first flange portion at an intermediate portion thereof;
A shaft portion on the tip end side of the first grounding short-circuit device main body protrudes from the upper surface, the first flange portion is housed inside, and is connected to the first grounding short-circuit device main body so as to be rotatable around its axis, A first cylindrical conductive body which is movable in the axial direction of the first grounding short-circuit device main body;
A pair of hook-shaped first ground hooks projecting from the upper surface of the first conductive cylinder and capable of locking an electric wire from the upper surface side;
A first biasing member that is disposed inside the first conductive cylinder and biases a force that abuts the first flange portion on a bottom surface of the first conductive cylinder;
A ground wire having one end connected to the outer periphery of the first conductive cylinder,
The first flange has one or more protrusions protruding from the outer periphery thereof,
The first conductive cylindrical body is opened in a two-stage crank shape, and has a track on the outer periphery for guiding the protrusion,
The orbit is
A starting end for stopping the projection in a state where the first flange portion is biased by the first biasing member and the first ground hook is closest to the first receiving bracket;
An electric wire is formed to be continuous with the start end and parallel to the axial direction of the first conductive cylinder, and against the urging force of the first urging member, the first ground hook and the first receiving bracket are used to wire the electric wire. A first linear trajectory for guiding the projection to a state where it can be pinched;
An intermediate track continuous with the first linear track and formed in an outer peripheral direction of the first conductive cylinder;
The first track is formed in parallel with the axial direction of the first conductive cylinder body while being continuous with the intermediate track, between the first ground hook and the first receiving bracket against the urging force of the first urging member. A second linear track that guides the projection in a state where the first ground hook and the first receiving bracket are separated so that an electric wire can be freely introduced into the first ground hook and the first receiving bracket;
The first ground hook is formed from the front first receiving bracket against the urging force of the first urging member. A ground short circuit device, comprising: a terminal track that maintains the protrusion in the most distant condition. The common operation rod is
A cylindrical shaft,
One or more pins protruding in the centrifugal direction from the outer periphery of the shaft portion,
The first connection fitting includes:
A first shaft hole that is open on the bottom surface and that can be freely fitted to the shaft portion;
The grounding short-circuit device according to claim 1, further comprising: a first engagement groove cut out in an L-shape from a bottom surface of the first connection fitting so as to be freely fitted to the pin. A semicircular cover in which one piece is fixed to the outer periphery of the first conductive cylinder, and the other piece is arranged close to the outer periphery of the first connection fitting;
The cover has an edge on the other piece that prevents the pin from entering, and a cutout that does not hinder the movement of the pin when the protrusion is located at the start end of the track. 3. The ground short-circuit device according to claim 2, further comprising: A ground short-circuiting device that short-circuits an electric wire by using a long common operation rod that can connect a tip tool having a different purpose to a tip portion interchangeably.
At the distal end, a second receiving fitting capable of receiving the electric wire from the lower surface side is provided, and at the base end, a cylindrical second connecting fitting that can be detachably connected to the leading end of the common operation rod is provided, and has a substantially circular shape. A cylindrical second grounding short-circuit device main body having a second flange portion at an intermediate portion;
The second ground short-circuiting device main body protrudes from the upper surface at the tip end side, the second flange portion is housed therein, and is connected to the second grounding short-circuiting device main body so as to be rotatable around its axis. A cylindrical second conductive cylinder that is movable in the axial direction of the grounding short-circuit device body;
A pair of hook-shaped second ground hooks projecting from the upper surface of the second conductive cylinder and capable of locking the electric wire from the upper surface side;
A second biasing member that is disposed inside the second conductive cylinder and biases a force that abuts the second flange portion on a bottom surface of the second conductive cylinder;
A ground wire having one end connected to the outer periphery of the second conductive cylinder,
The second grounding short-circuit device main body has one or more protrusions protruding from an outer periphery thereof and extending in an axial direction from an upper surface of the second flange toward the second receiving member,
The second conductive cylinder,
A guide groove for opening the upper surface so that the ridge can pass in the axial direction, and guiding the ridge;
A restricting wall projecting from the bottom surface of the second conductive cylinder, allowing rotation of the ridge in one direction, and restricting rotation of the ridge in the other direction,
An electric wire standby state in which the protrusion is guided by the guide groove, and only movement of the second conductive cylinder in the axial direction with respect to the second grounding short-circuit device body is permitted;
The edge of the ridge abuts against the bottom surface of the second conductive cylinder, and is freely displaceable between an electric wire introduction state in which an electric wire can be introduced between the second receiving bracket and the pair of second earth hooks. Ground shorting device. The common operation rod is
A cylindrical shaft,
One or more pins protruding in the centrifugal direction from the outer periphery of the shaft portion,
The second connection fitting,
A second shaft hole that is open on the bottom surface and is freely fittable with the shaft portion;
The ground short-circuiting device according to claim 4, further comprising: a second engagement groove cut out in an L-shape from a bottom surface of the second connection fitting so as to be fitted with the pin.

Images