JP2008079430A - Temporary support for ground wire edge portion and tool for ground shorting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temporary support for a ground wire edge portion and a tool for ground shorting, capable of realizing work for easily and safely connecting a terminal of the ground wire to the terminal on an electric line side when the 22 kV electric line is made short to ground. <P>SOLUTION: This temporary support 10 for the ground wire edge portion in which a screw terminal 170 on the ground side at an edge portion of the ground wire 160 is screwed to a screw terminal 110 on the power distribution side which is communicated and connected to the electric line 100 with specially high voltage of 22 kV in advance to use it for the work for making short to ground. This support includes a hook portion 11 which is detachably attached to the electric line, a retaining portion 12 which detachably stops the screw terminal on the ground side of the edge portion of the ground wire with the insulation operating bar 200, a joint portion 22 which detaches/attaches the edge portion of the insulation operating bar, and a support member 13 in which a plurality of retaining portions are disposed together with the hook portion and the joint portion to support the ground wire edge portion. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a temporary support for a grounding wire end and a grounding short-circuiting tool, and more particularly to a device that can facilitate the work of grounding and shorting a 22 kV extra-high-voltage electric wire.

  Conventionally, when performing various operations on power receiving equipment and electric lines, grounding wires have been connected and short-circuited to ensure safety, and various types of grounding according to each connection point have been performed. Short-circuit tools have been proposed (see, for example, Patent Documents 1 to 4).

As a grounding short-circuit tool of this kind, whenever a 6-kV three-phase electric line is short-circuited to the ground, the jacket is peeled off and the grounding line is connected to the core line (conducting line) of the electric line and short-circuited. However, in this case, insulation is ensured by tape-wrapping the part where the outer cover is peeled off.
Japanese Utility Model Publication No. 7-7076 JP 2002-152935 A Japanese Utility Model Publication No. 5-60119 JP 2001-157333 A

  However, in such a conventional ground short-circuit tool, when a 22 kV special high-voltage line is short-circuited to the ground, it is treated by the same treatment as a 6 kV electric wire line to ensure insulation because of the extra high voltage. It is not possible. For this reason, in such an extra-high voltage electric line, a screw terminal capable of ensuring insulation is connected in advance to the conductive line of the electric line, and the screw terminal is connected to the ground line side. By grounding and screwing the screw terminals, the ground can be short-circuited. Thereafter, the screw terminal on the ground wire side can be removed and returned to its original state to ensure insulation.

  For this reason, for example, when a three-phase electric wire is short-circuited to ground, a screw terminal 170 that can be connected to the screw terminal 110 on the electric wire 100 side is provided at the end as shown in FIG. Preparing a ground wire 150 having a branch ground wire 160 and a collective ground wire 180 in which the branch ground wire 160 is assembled and a ground metal fitting such as a so-called crocodile clip is provided at the end; After the screw terminal 170 of the first branch ground wire 160 is held at the tip of the insulation operation rod 200 shown in FIG. 6 and connected to the screw terminal 110 of the first wire conduit 100, the tip of the insulation operation rod 200 is shown. The screw terminals 170 of the second and third branch ground wires 160 are sequentially held and connected to the screw terminals 110 of the second and third wire lines 100.

  For this reason, when the second and third branch ground wires 160 and the collective ground wire 180 are also hung on the first branch ground wire 160, and the shaking occurs, the screw terminals 110, 170, etc. There is a risk of damage. The operation of holding the screw terminals 170 of the second and third branch ground wires 160 at the tip of the insulation operating rod 200 is a state in which the first branch ground wire 160 is electrically connected to the first wire 100. As a result, an electric shock accident due to an induced voltage or a residual charge may occur for some reason.

  Therefore, the present invention provides a grounding wire end temporary support tool and a grounding shorting tool for realizing an operation of easily and safely connecting a terminal of a grounding wire to a terminal on the wireway side when a 22 kV electric wire is short-circuited to the ground. The purpose is to provide.

  The first invention of the temporary support for the ground wire end that solves the above-mentioned problem is that the ground-side screw terminal of the ground wire end is screwed to the wire-side screw terminal that is conductively connected in advance to the 22 kV extra-high-voltage electrical wire. A temporary support for the end of the grounding wire used when performing the work of grounding and shorting, and an insulating operation rod for attaching the mounting portion detachably attached to the electric wire and the grounding side screw terminal of the grounding wire end A screw terminal locking portion that is detachably locked, and a support portion that is provided with a plurality of screw terminal locking portions together with the mounting portion and supports the grounding tip portion.

  According to the present invention, in the state where the screw terminal at the end of the ground wire to be screwed into the screw terminal of the extra high voltage electric line of 22 kV is engaged with the screw terminal engaging part of the support part, the attachment part is temporarily attached to the electric line. The screw terminal at the end of the ground wire can be positioned in the vicinity of the screw terminal of the electric line, and the screw terminal at the end of the ground wire can be insulated from the screw terminal locking portion of the support portion, etc. By sequentially performing the operation of removing the screw and screwing it into the screw terminal of the electric wire path, the ground wire can be conductively connected to the electric wire path and the ground can be short-circuited. Therefore, even when the first branch grounding line is conductively connected to the electric line, the second and third branch grounding lines are not hung and remain held on the support portion. It is possible to prevent damage. In addition, the second and third branch ground wires do not hang unstably even after the first branch ground wire is electrically connected to the wire path, and each screw terminal is similarly insulated with an operating rod or the like. The screw terminals can be sequentially screwed to each other, and there is no need to manually screw them.

  In addition to the specific matters of the first invention, the second invention of the ground wire end temporary support that solves the above-described problems is characterized in that the screw terminal locking portion is configured to screw the ground side screw terminal of the ground wire end. It is a screw terminal that can be combined.

  According to the present invention, the screw terminal at the end of the ground wire can be screwed and locked to the screw terminal locking portion of the support portion in the same manner as the screw terminal of the electric wire path. Therefore, it is only necessary to provide the support part with a simple structure similar to the screw terminal of the electric line, and it can be attached to and detached from the support part by the same operation.

  In addition to the specific matters of the first or second invention, the third invention of the temporary support for grounding wire ends that solves the above-described problems is characterized in that the attachment portion includes a hook-shaped portion that is hooked on an electric wire, and an insulation operation. It is characterized by comprising a joint part for attaching and detaching the end part of the rod, and a slide part that approaches or separates from the curved inner surface side of the hook-shaped part by rotating the joint part.

  In this invention, after attaching the joint portion to the tip of the insulating operation rod, the insulation operation rod can be temporarily attached by gripping the hook and hooking the hook-shaped portion on the electric wire. By rotating the (joint portion), the slide portion can enter (approach) into the hook-shaped portion to attach the electric wire path to the curved inner surface. Therefore, it is possible to restrict the support part from being accidentally dropped or freely shaken, and various operations can be smoothly performed.

  According to a fourth aspect of the temporary support for grounding wire ends that solves the above problems, in addition to the specific matter of any one of the first to third aspects of the invention, the attachment portion includes a hook-shaped portion that is hooked on the electric wire. The hook-shaped portion is characterized in that a cross-sectional hook shape that can be hooked on the electric wire path extends in the extending direction of the electric wire path.

  In this invention, it can restrict | limit that a support part tries to rotate to a horizontal direction by the hook-shaped part hooked on an electric wire path extending in the extension direction of the electric wire path. Therefore, it can restrict that a support part shakes freely, and can perform various operations smoothly.

  In addition to the specific matters of any of the first to third inventions, the fifth invention of the temporary support for grounding wire ends that solves the above-mentioned problems is characterized in that the attachment portion has a hook-shaped portion that is hooked on the electric wire. And the hook-shaped portion is arranged at at least two remote positions of the support portion.

  In this invention, by hooking hook-shaped portions at two places on the electric wire path, the hook-shaped portions hooked at two different places on the same electric wire path or the hook-shaped portions that are separated from each other are restricted from rotating in the horizontal direction. can do. Therefore, it can restrict that a support part shakes freely, and can perform various operations smoothly.

  The first invention of a grounding short-circuiting tool that solves the above-described problem is that the grounding-side screw terminal at the end of the grounding wire is screwed to the wire-side screwing terminal that is conductively connected in advance to the 22 kV extra-high-voltage wiringing line, thereby shorting to ground A grounding short-circuit tool used when performing work, and holding the grounding wire end temporary support of any of the first to fifth inventions and the grounding-side screw terminal of the grounding wire end A screw terminal holder that rotates relative to the road-side screw terminal. The screw terminal holder includes a joint part that attaches and detaches the end of the insulation operating rod, and a ground-side screw terminal at the end of the ground wire. And an engaging portion that engages with the joint portion so as not to rotate relative to the joint portion.

  According to the present invention, there can be obtained a screw terminal holder that can obtain the effects of the above-mentioned temporary support for the ground wire end and screw and rotate the ground side screw terminal of the ground wire end with respect to the wire side screw terminal. It can be attached to and detached from the tip of the insulating operation rod, and the grounding side screw terminal at the end of the grounding wire can be screwed onto the electric wire side screw terminal by rotating the insulating operation rod. Therefore, it is possible to use the insulating operation rod in common with other tools, and when the temporary support has a joint portion, the temporary operation tool can also perform various operations using the insulation operation rod in common. .

  As described above, according to the present invention, the ends of all the ground wires that are conductively connected to the 22 kV extra-high voltage electric wire are temporarily supported by the electric wires, and the screw terminals are screwed into the respective electric wires. The operations can be performed sequentially, and the screw terminal at the end of the ground wire can be moved from the vicinity so that the screw terminal of the electric line can be easily screwed together. Therefore, the other grounding wire is not suspended from the first grounding wire and is not damaged, and the electric wire is not handled by handling the screw terminal at the end of the second and subsequent grounding wires by hand. The grounding and shorting operation can be completed easily and safely.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings. FIGS. 1-7 is a figure which shows 1st Embodiment of the earthing | grounding short-circuit tool provided with the temporary support tool for ground wire ends which concerns on this invention, and a screw terminal holder.

  In FIG. 1, the temporary support 10 for the end portion of the grounding wire is used to connect the screw terminal 170 of the grounding wire 150 shown in FIG. The auxiliary tool used together with the screw terminal holder 50 shown in FIG.

  First, here, as shown in FIGS. 3 and 4, the screw terminal 110 for grounding short-circuit that is installed in advance in the electric wire 100 is formed in a T shape and is electrically connected to the electric wire 100. And a cover member 115 that defines a T-shaped space S inside the connection terminal 111 so that the connection terminal 111 can be installed inside, and a lid member that is connected to and held by the connection terminal 111 to close the lower side opening 117a of the cover member 115. 121.

  The connection terminal 111 includes a straight portion 112 that is conductively connected by crimping and connecting the conductive wire 100b with the outer sheath 100a of the electrical line 100 peeled off from the slit 112a, and the center of the straight portion 112. And a female screw portion 113 provided continuously to the portion. The connection terminal 111 enables a grounding short circuit of the electrical line 100 by electrically connecting the ground line 150 to the female screw part 113 in a state where the straight part 112 is electrically connected to the conductive line 100 b of the electrical line 100.

  The cover member 115 is made of an insulative resin material and includes a straight portion 116 that defines an insertion space of the electric wire 100 at a location where the straight portion 112 of the connection terminal 111 is conductively connected, and a female screw of the connection terminal 111. And an insertion portion 117 that defines a space in which the end portion of the ground wire 150 is inserted and conductively connected. The cover member 115 covers the both ends of the straight portion 116 with an insulating coating 118 and fills the inside with an insulating resin material 119, thereby ensuring the 22 kV extra high voltage insulation of the electric wire 100 together with the lid member 121. Yes.

  The lid member 121 includes a male screw part 122 that can be fixed by being screwed into the female screw part 113 of the connection terminal 111, and a rod-like member 123 made of an insulating material that is continuously connected to the male screw part 122 so as not to rotate relative thereto. A disk member 124 made of an insulating material that holds the rod-shaped member 123 in the center and closes the lower opening 117a of the insertion portion 117 of the cover member 115, and an end portion of the rod-shaped member 123 are connected in a non-rotatable manner. A hexagonal screw portion 125. The lid member 121 has an opening on the lower side of the cover member 115 by rotating the hexagonal screw portion 125 with a rotating tool or the like to screw the male screw portion 122 into the female screw portion 113 of the connection terminal 111 via the rod-like member 123. 117a can be attached / detached so as to be closed / opened, thereby enabling grounding short circuit and insulation of the electric wire 100.

  Further, as shown in FIG. 5, the screw terminal 170 of the ground wire 150 (branch ground wire 160) has three branch ground wires that are branched from the collective ground wire 180 that is grounded by a ground fitting such as an alligator clip. The round terminal 171 is connected to the tip of the branch ground line 160 and is refracted at a substantially right angle, and is attached to the round terminal 171 so as not to fall off. A male screw part 172 that can be fixed by being screwed to the female screw part 113 of the screw terminal 110 on the side, and a hexagonal screw part 173 that is connected to the male screw part 172 so as not to be relatively rotatable are provided. The screw terminal 170 of the branch ground line 160 is fixed by rotating the hexagonal screw portion 173 with a rotating tool or the like and screwing the male screw portion 172 to the female screw portion 113 of the screw terminal 110 on the electric wire 100 side. The round terminal 171 can be conductively connected to the connection terminal 111 of the screw terminal 110, and the electric line 100 can be short-circuited to the ground via the branch ground line 160 and the collective ground line 180.

  Returning to FIG. 1, the temporary support 10 is held together with the hook portion 11 to be hooked on the electric line 100, the holding portion 12 to which the screw terminal 170 of the branch ground line 160 is connected and the tip is held, and the hook portion 11. And a long support member 13 provided with the portion 12 at three locations. The temporary support 10 is assembled by attaching and holding the front end of the branch ground wire 160 to all the holding portions 12 of the support member 13 and then hooking and attaching the hook portion 11 of the support member 13 to the electric wire 100. An operation of sequentially connecting the branch ground lines 160 to the screw terminals 110 of the electric line 100 can be realized while the ground lines 150 including the ground lines 180 are dispersedly held by the three branch ground lines 160.

  Specifically, the hook portion 11 of the temporary support 10 includes a hook-shaped portion 21 that is hooked on the electric wire path 100, a joint portion 22 that is attached to the tip of the insulating operation rod 200 shown in FIG. And a slide portion 23 that is continuously connected to move the head portion 23a back and forth in the hook-shaped portion 21.

  The hook-shaped portion 21 of the hook portion 11 is disposed at a position shifted from the center in the length direction of the support member 13, and the opening through which the electric wire 100 enters is on the center side in the length direction of the support member 13. The support member 13 is fixed in such a posture. Thereby, the hook part 11 can be made into the attitude | position which hooks on the electric wire path 100 in the position shifted | deviated from the center of the length direction of the supporting member 13, and the opening of the hook-shaped part 21 falls, and the electric wire path 100 carelessly It is possible to reduce the detachment.

  The joint portion 22 is formed in a bottomed cylindrical shape with the rear end surface of the base end portion opened so that the distal end portion of the insulating operation rod 200 can be inserted, and peripheral surfaces on opposite sides of the cylindrical portion. Is cut into a substantially T-shape so that the insertion notch 22a from the rear end face (insulating operation rod 200) side toward the tip end and the insertion notch 22a are bent so as to be continuous on both sides in the orthogonal direction. A pair of engaging cutout portions 22b is formed. As a result, as will be described later, the hook portion 11 is not relatively rotatable and can be pulled out by engaging the pin 201 of the operation rod 200 from the insertion notch portion 22a of the joint portion 22 to the inside of the engagement notch portion 22b. Can be attached impossible (cannot be dropped).

  The slide portion 23 is formed with a male screw shape 23b that engages with a female screw (not shown) formed on the support member 13 on the outer peripheral surface, and a joint portion in the axial direction with respect to the support member 13 (female screw). The head portion 23a can be moved back and forth within the hook shape portion 21 by changing the screwing position with the male screw shape 23b by being relatively rotated through the head 22.

  Thereby, after the hook part 11 of the temporary support 10 is made to enter the wire path 100 from the opening side of the hook-shaped part 21 and is hooked, the slide part 23 is rotated via the joint part 22, The head portion 23 a of the slide portion 23 can be brought close to the curved portion of the hook-shaped portion 21 and can be clamped (held) while pressing the electric wire path 100, and the support member 13 of the temporary support tool 10 can be held in the electric wire path 100. It can be easily and temporarily attached to a desired position. On the other hand, the hooking portion 11 of the temporary support 10 causes the head portion 23a of the slide portion 23 to be separated from the curved portion of the hook-shaped portion 21 by reversely rotating the slide portion 23 via the joint portion 22. The electric wire path 100 can be freely released from the opening side of the hook-shaped portion 21, and the support member 13 of the temporary support 10 can be easily recovered from the electric wire path 100. That is, the support member 13 constitutes a support portion, and the hook portion 11 constitutes an attachment portion.

  The holding portion 12 of the temporary support 10 is formed by embedding a female screw portion 31 capable of screwing the male screw portion 172 of the screw terminal 170 of the branch ground wire 160 in the long support member 13. The four parts including the slide part 23 of the hook part 11 (the part corresponding to the curved part hooked on the wire path 100 of the hook-shaped part 21) are arranged substantially equally in the length direction of the support member 13 so that both ends are provided. It is arranged at two places and one place inside.

  As a result, the holding portion 12 of the temporary support 10 rotates the hexagonal screw portion 173 at the end of the branch ground wire 160 with the rotating tool, thereby changing the male screw portion 172 at the end of the branch ground wire 160 into the female screw of the support member 13. The screw terminal 170 of the three branch ground wires 160 can be temporarily held by the support member 13. On the other hand, the holding portion 12 of the temporary support 10 is configured such that the male screw portion 172 can be easily removed from the female screw portion 31 of the support member 13 by reversely rotating the hexagon screw portion 173 with a rotating tool, and the electric wire path 100 is left as it is. It is possible to sequentially perform the operation of screwing and connecting to the screw terminal 110. That is, the male screw portion 172 of the screw terminal 170 of the branch ground line 160 constitutes a ground side screw terminal, and the holding portion 12 constitutes a screw terminal locking portion.

  Here, in the present embodiment, the temporary support 10 is not limited to the arrangement in which the holding portion 12 and the like are equally disposed on the long support member 13. For example, the slide portion 23 of the hook portion 11 is used as the support member 13. Further, the support member is not limited to the long member, and for example, the holding portion 12 is provided at each apex of the triangular shape and the hook portion 11 is provided at the center thereof. A balance may be achieved by providing the slide portion 23.

  Next, as shown in FIG. 2, the screw terminal holder 50 includes a rotary tool portion 51 that rotates a hexagonal screw portion formed in a hexagonal column shape, and the rotary tool portion 51 at the tip of the insulating operation rod 200. A joint member 52 to be attached to the insulation operating rod 200, and by attaching the rotary tool portion 51 to the tip of the insulation operating rod 200 via the joint portion 52, the lid member 121 of the screw terminal 110 of the electric wire 100 or It is possible to easily and safely perform an attaching / detaching operation in which the screw terminal 170 of the branch ground line 160 is rotated relative to the screw terminal 110 of the electric wire path 100 to be screwed together.

  Specifically, the rotary tool portion 51 of the screw terminal holder 50 is formed in a cylindrical shape, and a socket 51a having a hexagonal column is formed at the tip thereof, and the socket 51a is connected to each other. Even if the relative angle about the direction is shifted, the hexagonal column is formed in a socket shape that can be easily housed and locked so as not to be relatively rotatable. That is, the rotary tool part 51 constitutes an engaging part.

  The joint portion 52 is designed to have the same structure as the joint portion 22 of the temporary support 10, and engages the pin 201 of the insulating operation rod 200 from the insertion notch portion 52 a of the joint portion 52 as will be described later. The rotary tool part 51 can be attached to the tip of the insulating operating rod 200 so as not to be relatively rotatable and not to be pulled out (cannot be dropped off) by entering and hooking into the notch 52b.

  As a result, the rotary tool portion 51 of the screw terminal holder 50 uses the insulating operation rod 200 that is attached to and detached from the joint portion 22 of the temporary support 10 in common (using the general-purpose insulating operation rod 200) to insulate it. In the socket 51a of the rotary tool part 51 attached to the tip of the operation bar 200, the cover member 121 and the hexagonal screw parts 125 and 173 of the branch ground line 160 can be mounted in a relatively non-rotatable manner. By rotating, the respective male screw portions 122 and 172 are screwed into the screw terminals 110 of the electric wire path 100 and the female screw portions 113 and 31 of the support member 13 of the temporary support 10, and the screwing is released to remove the screws. Thus, it is possible to easily perform operations such as holding in such a state.

  Here, the insulating operation rod 200 is a general-purpose tool, as shown in FIG. 6, and is temporarily provided in a protruding shape on the opposite side surfaces of the tip portion to thereby temporarily support the tool 10 and the screw terminal holder 50. Pins 201 that can be inserted into and engaged with the two cutout portions 22a, 22b, 52a, and 52b of the joint portions 22 and 52, and a built-in spring (not shown) disposed on the distal end surface of the distal end portion. A protrusion 202 urged in the protruding direction, a grip 203 that can be screwed into a screw shape (not shown) engraved on the side surface of the tip, and a slipper that can replace a non-slip material are provided. And a grip portion 204 on the proximal end side gripped by the worker.

  As a result, the insulating operating rod 200 is inserted into the joint portions 22 and 52 of the temporary support tool 10 and the screw terminal holder 50 to sink the protrusion 202 against the elastic force of the built-in spring, while the pin 201 After the two are moved into the notches 22a, 22b, 52a, and 52b of the joint portions 22 and 52 and then rotated, the protrusion 202 protrudes due to the elastic force of the spring and the joint portion 22 is released. , 52 can be engaged with the pins 201 in the engagement grooves 22c, 52c bent from the engagement notches 22b, 52b. Further, the insulating operating rod 200 can be locked so that the pin 201 is not detached from the engaging groove 52c and rotated by rotating the grip 203 toward the joint portion 52, and the screw terminal holder 50 can be locked. Can be reliably handled to be easy to handle. Here, the insulating operating rod 200 is provided with umbrella covers 205 and 206 at an intermediate portion, and the whole is made of an insulating material such as plastic, so that insulation is ensured. The cover 205 drips moisture from the temporary support 10 and the screw terminal holder 50 side, and the umbrella cover 206 on the base end side indicates a limit position where the work can be safely performed, thereby ensuring safety when working. ing.

  For this reason, when performing the grounding short circuit operation of the electric wire 100, first, the grounding is connected to the female screw portions 31 of the holding portion 12 arranged in three places of the support member 13 of the temporary support 10. The male screw portions 172 at the ends of the three branch ground wires 160 connected to the collective ground wire 180 are screwed and connected, and the tip of the insulating operating rod 200 is attached to the joint portion 22 of the hook portion 11 of the temporary support 10. . Thereafter, the insulating operation rod 200 is grasped, and the hook-shaped portion 21 of the hook portion 11 of the temporary support 10 is hooked in the vicinity of the screw terminal 110 of one of the three phases (preferably in the center) of the electric line 100. Later, by rotating the insulating operation rod 200 as it is, the electric wire path 100 can be held between the head portion 23a of the slide portion 23 and the hook-shaped portion 21, and attached without fear of dropping due to wind or the like. be able to. At this time, the screw terminals 170 at the tips of the three branch ground wires 160 are positioned in the vicinity of the screw terminals 110 of the electric line 100.

  Next, after removing the tip of the insulation operation rod 200 from the joint portion 22 of the temporary support 10 in a state of being attached to the electric wire 100 by reverse operation, the screw terminal holder 50 is attached to the tip of the insulation operation rod 200. The joint part 52 is attached. At this time, when the insulating operation rod 200 is attached to the joint portion 22 of the temporary support 10, the grip 203 is not removably used, whereas the insulation operation rod 200 is attached to the joint of the screw terminal holder 50. On the other hand, when attaching to the part 52, the grip 203 is used so that it cannot be removed.

  Next, the insulation operation rod 200 is gripped, and the hexagonal screw portion 125 of the lid member 121 of the screw terminal 110 installed in the electric wire 100 is relatively rotated into the socket 51 a of the rotary tool portion 51 of the screw terminal holder 50. By internally disabling and rotating together with the insulating operation rod 200, the male screw portion 122 of the cover member 121 can be removed from the female screw portion 113 of the connection terminal 111 of the screw terminal 110, and the cover member 121 is at hand. It can collect | recover and the lower side opening 117a of the insertion part 117 of the cover member 115 of the screw terminal 110 can be open | released.

  Thereafter, as shown in FIG. 7, the lid member 121 is removed from the rotary tool portion 51 of the screw terminal holder 50, and the electric wire 100 near the screw terminal 110 is placed in the socket 51 a of the rotary tool portion 51. The hexagonal screw portion 173 of the branch ground wire 160 screwed into the holding portion 12 of the support member 13 of the temporary support tool 10 attached to the housing is mounted so as not to be relatively rotatable, and is rotated together with the insulating operation rod 200 to thereby branch the ground. The male screw portion 172 can be removed from the female screw portion 31 of the holding portion 12 of the temporary support 10 while holding the hexagonal screw portion 173 of the wire 160.

  Subsequently, the screw terminal 170 at the tip of the branch ground wire 160 that holds the hexagonal screw portion 173 by the rotary tool portion 51 of the screw terminal holder 50 is simply moved by moving the insulating operation rod 200 as it is. The screw terminal 110 can be inserted into the insertion part 117 of the cover member 115 from the lower side opening 117a. By rotating the insulating operation rod 200, the female screw part 113 of the connection terminal 111 of the screw terminal 110 is rotated. The male screw portion 172 of the screw terminal 170 at the distal end of the branch ground line 160 can be screwed to be electrically connected.

  Then, by performing the same operation for each of the three branch ground wires 160, the screw terminals 170 of the branch ground wires 160 are held by the temporary support 10, and the screw terminals 110 of the three-phase electric wire 100 are sequentially applied. It can be moved to establish a conductive connection.

  In addition, after the work that required the ground 100 to be short-circuited is completed, the ground short-circuit work of the branch ground wire 160 to the wire 100 described above is performed in the reverse procedure, thereby screwing the branch ground wire 160. After the terminal 170 is held in the temporary support tool 10, it can be recovered easily and without being damaged.

  As described above, in the present embodiment, another branch ground line 160, the collective ground line 180, and the like are not temporarily suspended from one branch ground line 160. The ground short-circuiting operation of the electric line 100 can be completed without damaging the female screw portion 113 and the male screw portion 172 of the screw terminals 110 and 170 of the ground wire 160. Further, at this time, the hexagonal screw portion 173 that is held (internally) in the screw terminal holder 50 in a non-rotatable state with the insulating operation rod 200 in an upright state is simply switched, and the branch ground wire 160 can be handled without being handled by hand. The male threaded portion 172 can be easily screwed to or detached from the temporary support 10 or the female threaded portions 31 and 113 of the screw terminal 110 of the electric wire 100 without fear of an electric shock due to induced voltage or residual charge, The grounding / short-circuiting operation of the electric line 100 can be completed safely. Furthermore, the insulating operation rod 200 is a general-purpose product that can be attached to and detached from a general joint part, and can be attached to and detached from the joint parts 22 and 52 of the temporary support 10 and the screw terminal holder 50 and used in common. Can do.

  Next, FIG. 8 is a figure which shows 2nd Embodiment of the temporary support tool for earthing | grounding wire end parts of the earthing | grounding short-circuit tool based on this invention. Here, since the present embodiment is configured in substantially the same manner as the above-described embodiment, the same components are denoted by the same reference numerals and the characteristic portions will be described (also in other embodiments described later). The same).

  In FIG. 8, the hook portion 11 of the temporary support 10 is provided with a hook-shaped portion 61 instead of the hook-shaped portion 21 in the above-described embodiment, and the hook-shaped portion 61 bends the hook-shaped curved portion. An extending curved portion 61a extending in both directions orthogonal to the direction is provided continuously.

  As a result, the temporary support 10 has the hook portion 11 (extended curved portion 61 a) hooked to the electric wire path 100 extending in the direction in which the electric wire line 100 extends, and the hook of the hook portion 11. By hooking the extended curved portion 61 a of the shape portion 61 along the electric wire path 100, it is possible to restrict horizontal rotation during the grounding short-circuiting operation of the electric wire path 100, and to maintain the posture with respect to the electric wire path 100. can do.

  As described above, in the present embodiment, in addition to the operational effects of the above-described embodiment, the temporary support 10 does not freely rotate horizontally, and the branch ground wire 160 is connected to the female screw portion 31 of the temporary support 10. The operation of screwing or removing the male screw portion 172 can be performed smoothly. Therefore, the ground short-circuiting operation of the electric line 100 can be completed more easily and quickly.

  Next, FIG. 9 is a figure which shows 3rd Embodiment of the temporary support tool for earthing | grounding wire end parts of the earthing | grounding short-circuit tool based on this invention.

  In FIG. 9, the hook portion 11 of the temporary support 10 has the hook-shaped portions 21 in the above-described embodiment disposed at both ends of the support member 13, and the pair of hook-shaped portions 21 are connected to two electric wire paths. Each can be hooked to 100.

  Thereby, the temporary support 10 can be made into the state which hook-shaped part 21 of the hook part 11 of two places was hooked on the different electric wire path 100, and is going to rotate to a horizontal direction during the earth | ground short circuit work of the electric line 100. It is possible to maintain the posture with respect to the electric wire 100 by restricting the rotation of the electric wire 100 and restricting the rotation about the direction of the axis of the electric wire 100.

  As described above, in the present embodiment, in addition to the operational effects of the above-described embodiment, the temporary support 10 does not freely swing, and the branch ground wire 160 is connected to the female screw portion 31 of the temporary support 10. The operation of screwing or removing the male screw portion 172 can be performed smoothly. Therefore, the ground short-circuiting operation of the electric line 100 can be completed more easily and quickly.

  Further, as another aspect of the present embodiment, the hook-shaped portion 21 may be directed in a direction orthogonal to the length direction of the support member 13. The hook-shaped part of the hook part 11 can be hooked, and substantially the same effect can be obtained.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea. For example, in the above-described embodiment, a case in which the tips of the three branch ground wires 160 that short-circuit the three-phase electric wire 100 can be supported will be described. However, the present invention is not limited to this. Needless to say, it may be used for the grounding wire, and it may be designed to support more ends of the grounding wire.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole 1st Embodiment structure of the temporary support tool for earthing | grounding wire end parts of the earthing | grounding short circuit tool which concerns on this invention, (a) is the front view, (b) is the side view, (c) is It is the bottom view. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole structure of 1st Embodiment of the screw terminal holder of the earthing | grounding short circuit tool which concerns on this invention, (a) is the front view, (b) is the top view. It is a figure which shows the screw terminal which connects a ground wire with the earthing | shorting tool, (a) is a top view which shows the cover member, (b) is a partial cross section top view which shows the connection terminal, (c) is the figure It is a top view which shows a cover member. It is a longitudinal cross-sectional view which shows a state when installing in the electric wire path of the screw terminal shown in FIG. It is a top view which shows the screw terminal of the ground wire connected to the screw terminal of the electric wire path shown in FIG. It is a top view which shows the insulation operating rod used for the earthing | shorting operation | work. It is a perspective view explaining use of the ground wire end temporary support and the screw terminal holder of the ground short-circuit tool. It is a figure which shows the whole structure of 2nd Embodiment of the temporary support tool for earthing | grounding wire end parts of the earthing | grounding short circuit tool which concerns on this invention, It is the side view. It is a figure which shows the whole structure of 3rd Embodiment of the ground wire end part temporary support tool of the earthing | grounding short circuit tool which concerns on this invention, and is the side view. It is a state figure explaining the subject of a prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Temporary support tool 11 ... Hook part 12 ... Holding part 13 ... Support member 21, 61 ... Hook-shaped part 22, 52 ... Joint part 23 ... Slide part 23a ... Head part 23b ... Male Screw shape 31, 113 ... Female screw part 50 ... Screw terminal holder 51 ... Rotating tool part 51a ... Socket 61a ... Extended curved part 100 ... Electric wire 100b ... Conducting wire 110, 170 ... Screw Terminal 111 ... Connection terminal 112 ... Straight part 115 ... Cover member 116 ... Straight part 117 ... Insertion part 117a ... Lower side opening 118 ... Insulation coating 119 ... Insulating resin material 121 ... Lid member 122 , 172 ...... Male thread part 123 ...... Rod-shaped member 124 ...... Disk member 125, 173 …… Six Threaded portion 150 ...... ground line 160 ...... branch ground line 180 ...... set ground line 200 ...... insulated operating rod 204 ...... gripper

Claims (6)

Temporary support tool for the end of the grounding wire used when the grounding side screw terminal of the grounding wire end is screwed into the wireway side screw terminal that is conductively connected in advance to the extra-high-voltage electrical wireway to perform a grounding short circuit. Because
A mounting part that is detachably attached to the electric wire, a screw terminal locking part that detachably locks the ground-side screw terminal at the end of the ground wire with an insulating operation rod, and a plurality of screw terminal locking parts together with the mounting part. A grounding wire end temporary support device, comprising: a support portion that is provided and supports the grounding tip portion.   2. The ground wire end temporary support according to claim 1, wherein the screw terminal locking portion is a screw terminal capable of screwing the ground side screw terminal of the ground wire end.   The attachment portion includes a hook-shaped portion that is hooked on the electric wire path, a joint portion that attaches / detaches the end portion of the insulating operation rod, and a slide that moves closer to or away from the curved inner surface side of the hook-shaped portion by rotating the joint portion. And a ground wire end temporary support according to claim 1 or 2. The mounting portion includes a hook-shaped portion that is hooked on the electric wire path,
The ground wire end temporary support according to any one of claims 1 to 3, wherein the hook-shaped portion has a cross-sectional hook shape that can be hooked on an electric wire path extending in an extending direction of the electric wire path. The mounting portion includes a hook-shaped portion that is hooked on the electric wire path,
The ground wire end temporary support according to any one of claims 1 to 3, wherein the hook-shaped portion is disposed at at least two remote positions of the support portion. A grounding short-circuit tool used when performing a work to short-circuit the ground by screwing the ground-side screw terminal at the end of the ground wire to the wire-side screw terminal conductively connected in advance to the special high-voltage electrical line,
The ground wire end temporary support according to any one of claims 1 to 5, and a screw terminal holder that holds the ground side screw terminal at the end of the ground wire and rotates relative to the wire side screw terminal. , And
The screw terminal holder includes a joint portion that attaches / detaches an end portion of the insulating operation rod, and an engagement portion that engages the ground-side screw terminal at the end portion of the ground wire with the joint portion in a relatively non-rotatable manner. A grounding short-circuit tool characterized by:

Images