JP4443372B2 - Grounding short-circuit apparatus, grounding component, and grounding short-circuit device - Google Patents

Description

  The present invention relates to a grounding short-circuit apparatus, a grounding component, and a grounding short-circuit device, and more particularly, in a cutout device disposed in a front stage on a load device side that supplies power from a commercial power supply, the grounding operation on the load device side is performed. It relates to things that can be done reliably and safely.

  Conventionally, since a voltage higher than the voltage supplied to the load device is supplied to the commercial power supply side electric wire, a transformer that supplies a voltage corresponding to the load device is installed, and the voltage exceeding the transformer capacity is excessive. In order to prevent a current from flowing into the transformer, a cutout device incorporating a fuse is interposed on the commercial power supply side of the transformer.

  As this type of cutout device, for example, as shown in FIG. 10, there is a device designed to close a box-shaped main body 11 with a lid (conduction portion) 12 (for example, Patent Document 1). reference).

  The main body portion 11 of the cutout device 10 includes a power connection portion 13 for connecting the electric wire D1 branched from the electric wire on the commercial power supply side, a load connection portion 14 for connecting the electric wire D2 from the transformer on the load device side, Is arranged. Further, the lid body portion 12 of the cutout device 10 includes conduction blades 15 and 16 connected to the connection portions 13 and 14 on the main body portion 11 side, and conducts between the conduction blades 15 and 16 via the fuse 18. A so-called fuse cylinder 17 is provided. In this cutout device 10, the lid 12 is rotatably attached to one end of the main body 11, and the lid 12 is rotated so as to close the open surface side of the main body 11. Simultaneously with the cover, the connection blades 15, 16 can be connected to the connection portions 13, 14, and the power connection portion 13 and the load connection portion 14 can be conducted through the fuse cylinder 17.

  In such a box-shaped cutout device 10, as shown in FIG. 10, the lid body portion 12 is rotated to open the main body portion 11, and the lid body dummy (non-conductive portion) shown in FIG. 22 can be attached to the main body 11 instead of the lid 12. The lid dummy 122 includes a conductive blade 126 connected to the load connecting portion 14 on the main body 11 side, a dummy blade 128 made of an insulating material inserted into the insertion hole 19 provided on the main body 11 side, and an outer surface. And a terminal (installation terminal portion) 121 that is disposed and is connected to the conductive blade 126 that is connected to the load connection portion 14 on the load device side.

  A ground short-circuit instrument 110 shown in FIG. 12 can be connected to the terminal 121 of the lid dummy 122 to ground the load device side of the cutout device 10. The grounding short-circuit instrument 110 includes a terminal connection portion 112 connected to the terminal 121, a clip (grounding portion) 114 connected to a ground conductor that is electrically connected to the ground, and a cable 115 that electrically connects the terminal connection portion 112 and the clip 114. In this ground short-circuit instrument 110, a terminal connecting portion 112 is disposed at the tip of the connecting rod 111 for each of the cables 115a to 115c branched into a plurality of cables.

  Therefore, in this cutout device 10, when a lid dummy (grounding component) 122 is attached to the main body portion 11 instead of the lid body (usually used component) 12, the power source connection portion 13 is connected to the lid dummy 122. Since the conducting blade 15 and the fuse cylinder 17 connected to the power source are removed, when performing maintenance or the like of the transformer, the operator grasps the connecting rod 111 to the cutout device 10 as shown in FIG. By connecting the terminal connection portion 112 to the terminal 121 of the lid dummy 122 to be attached, the load device side such as a transformer can be grounded to ensure safety. In addition, 118 in FIG. 12 is a hook connected to the other end portion of the string 119 connected to the branching point of the cable 115 and the cables 115a to 115c, and the hook 118 is inadvertently hooked. The connecting rod 111 is prevented from dropping.

  Similarly, the box-shaped cutout device 10 is configured to rotate the lid 12 to open the main body 11 as shown in FIG. 10, as shown in FIG. The charging terminal (conduction component) 132 can be attached to the main body 11 in place of the lid 12. The power supply terminal 132 is electrically connected to the conductive blades 135 and 136 that are conductively connected to the power supply connection portion 13 and the load connection portion 14 on the main body 11 side, respectively. As shown in FIG. 14B, for example, an attachment terminal (conduction terminal portion) 132a connected to the terminal connection portion 131 of the attachment 130 to which a DC pulse voltage is applied is fixed. Thereby, in this box-shaped cutout device 10, a so-called accident point search is performed in which a DC pulse voltage is applied from the attachment 130 via the power application terminal 132 to identify an accident point in the distribution line from the commercial power source. Etc. can be performed.

  Furthermore, as this type of cutout device, for example, as shown in FIG. 15, there is a device designed to have a structure in which a cylindrical main body 51 is closed by a lid body (conduction portion) 52 (for example, Patent Documents). 2 and 3).

  As with the box-shaped cutout device 10, the cutout device 50 has a power supply connection portion 53 that connects the commercial power supply side electric wire D1 and a load connection that connects the load device side electric wire D2 to the main body 51 side. A portion 54 is provided. The lid 52 is fitted into the cylindrical bottom of the main body 51 with the fuse cylinder 57 with the conduction cap 56 attached to the head on the conduction shoulder 55 on the distal end side. Designed to close. The cut-out device 50 is closed by inserting the lid body portion 52 into the main body portion 51, and at the same time, the conduction cap of the fuse cylinder 57 is connected to the insertion terminal 53 a that is conductive to the power connection portion 53 on the main body portion 51 side. 56, and a conductive connection can be established by pressing the conductive shoulder 55 to the receiving terminal 54a that is conductive to the load connecting portion 54 on the load device side, and a fuse (not shown) of the fuse cylinder 57 is connected. The power connection part 53 and the load connection part 54 can be made conductive.

  This cylindrical cutout device 50 is also designed to allow the load device side to be grounded when performing maintenance etc. on the transformer, etc., similarly to the box-shaped cutout device 10. In this cylindrical cutout device 50, as shown in FIG. 16, by removing the lid (normally used parts) 52 and the fuse cylinder 57, the power connection section 53 and the load connection section 54 via the fuse cylinder 57 are provided. 12 is simply inserted by inserting the connecting rod 111 of the grounding short-circuiting instrument 110 shown in FIG. 12 and set to the receiving terminal 54a of the load connecting part 54. The load device side can be grounded via the clip 114 and the cable 115 of the grounding short circuit device 110 to ensure safety. That.

Further, the cylindrical cutout device 50 has the lid body portion 52 removed from the main body portion 51, and, as shown in FIG. 17 (a), the charging terminal 172 (component for conduction) is connected to the lid body portion. Instead of 52, it can be inserted into the main body 51 and attached. As shown in FIG. 17 (b), the power charging terminal 172 is made of a rod-shaped conductive material, and a terminal (conduction terminal portion) that is attached and connected to the terminal connection portion 131 of the attachment 130 at the rear end portion. 172a is integrally formed, and the front end portion is fitted into the insertion terminal 53a of the power source connection portion 53 on the main body portion 51 side to conduct conduction, and the terminal connection portion 131 of the attachment 130 attached to the terminal 172a at the rear end portion. The conductive shoulder portion can be brought into pressure contact with the receiving terminal 54a of the load connection portion 54 to be conductively connected. As a result, even in the cylindrical cutout device 50, a so-called accident point search or the like can be performed by applying a DC pulse voltage from the attachment 130 via the power application terminal 172.
JP-A-5-101767 Japanese Utility Model Publication No. 7-14539 JP 2002-270083 A

  Here, in the case of handling electric wires and the like through which electricity flows, the indirect hot wire method of performing various operations through tools that ensure insulation, such as an insulating rod, is encouraged, and in these cutout devices It is desired that the work also employs an indirect hot wire method.

  However, in such a grounding short-circuit instrument 110 for the conventional cutout device, since the connection rod 111 connected to the terminal 121 to be grounded must be handled at hand, the electric charge remains in the transformer or the like. In some cases there is a risk of electric shock.

  The terminal 121 of the lid dummy 122 that connects the connecting rod 111 of the grounding short-circuiting device 110 is engraved with a male screw, whereas the terminal connection 112 of the connecting rod 111 of the grounding short-circuiting device 110 is connected to the terminal 121. Is designed to be connectable by engraving female threads. However, the terminals 132a and 172a of the charging terminals 132 and 172 are male screws that can be connected to the terminal connecting portion 112 of the connecting rod 111 of the ground short-circuiting device 110, and the terminal connecting portion 131 of the attachment 130 must be connected. Otherwise, there is a risk that the terminal connection portion 112 of the ground short-circuiting device 110 will be mistakenly connected and the commercial power supply side will be short-circuited to the ground. In this case, electric power from a commercial power source may flow into the ground short-circuit instrument 110 and an electric shock may occur.

  Therefore, an object of the present invention is to provide a grounding short-circuit apparatus and a grounding short-circuit device that can perform grounding work of the cutout device by an indirect hot wire method and can safely perform the grounding work. It is another object of the present invention to provide a grounding component and a grounding short-circuit device that can realize grounding without mistakes of the cutout device and can ensure the safety of the grounding work.

  An invention of a ground short-circuit apparatus that solves the above problems includes a power supply connecting portion that connects an electric wire from a commercial power source, a load connecting portion that connects an electric wire to the load device side, and between the power supply connecting portion and the load connecting portion. A grounding short circuit for grounding the load connecting part with a non-conducting part in which a fuse is removed from the conducting part instead of the conducting part attached to a cutout device having a conducting part interposed between the conducting part and a conducting part. A terminal connecting part connected to a terminal part arranged on the outer surface of the non-conducting part and conducting to the load connecting part, a grounding part for grounding in order to release accumulated charges, and these terminal connecting parts and A cable for conducting between the grounding portions, and the terminal connection portion is disposed on the distal end side of the instrument body in which the attachment portion attached to the distal end of the long insulating rod is disposed on the proximal end side, Figure for the mounting part There is characterized in that it is fixed.

  In the present invention, the grounding short-circuiting instrument can be attached to the tip of the insulating rod, and the position of the terminal connection portion of the grounding short-circuiting instrument can be stabilized against the operation of the insulating rod. Thereby, the non-conduction part by which the terminal part is connected to the terminal connection part of the earthing | grounding short circuit instrument can be set to a cutout apparatus via the insulating rod. Therefore, the load device side of the cutout device can be safely grounded and short-circuited by a so-called indirect hot wire method.

  An invention of a grounding component that solves the above problems includes a power connection portion that connects a wire from a commercial power source, a load connection portion that connects a wire to the load device side, and the power connection portion and the load connection portion. A grounding component that is attached to a cutout device having a conducting portion interposed between the load connecting portion and the conducting portion when the load connecting portion is grounded via a grounding short-circuit device. Connection of a grounding short-circuit device that is configured as a non-conducting part with the fuse removed from and cannot be connected to the conducting terminal part arranged on the outer surface of the conducting part that conducts between the power supply connecting part and the load connecting part A grounding terminal portion designed to be connectable to the load connection portion and conducting to the load connection portion is arranged on the outer surface.

  In this invention, the terminal connection part of the ground short-circuit instrument cannot be connected to the conduction terminal part of the conduction component, and can be connected only to the grounding terminal part of the non-conduction part of the cutout device. Therefore, it is possible to eliminate the risk of inadvertently connecting the grounding short-circuiting device to the conduction terminal portion.

  An invention of a ground short-circuit device that solves the above problems includes a power supply connecting portion that connects an electric wire from a commercial power supply, a load connecting portion that connects an electric wire to the load device side, and between the power supply connecting portion and the load connecting portion. A grounding short-circuit device, which is attached to a cutout device having a conducting portion interposed between the conducting portion and the conducting portion to be in a conducting state instead of the conducting portion and grounds the load connecting portion, wherein the fuse is removed from the conducting portion. A grounding component as a part, and a grounding short-circuit apparatus that is arranged on the outer surface of the grounding part and is connected to a terminal part that conducts to the load connection part and grounds the power supply part. A grounding terminal portion that is designed to be connectable to a connection portion of a grounding short circuit device that cannot be connected to a conduction terminal portion that is arranged on the outer surface of a conduction component that conducts between the load connection portion and conducts to the load connection portion. Is the exterior On the other hand, the grounding short-circuit apparatus is composed of a terminal connecting part connected to the grounding terminal part of the grounding part, a grounding part grounded to release the accumulated electric charge, and the terminal connecting part and the grounding part. A terminal connection portion of the grounding short-circuiting instrument is disposed on the distal end side of the instrument body in which a mounting portion to be attached to the distal end of the long insulating rod is disposed on the proximal end side. Thus, the posture with respect to the mounting portion is fixed.

  In this invention, a grounding short-circuiting instrument can be attached to the tip of the insulating rod, the position of the terminal connection part of this grounding short-circuiting instrument is stabilized against the operation of the insulating rod, and the terminal is connected to the terminal connection part of the grounding short-circuiting instrument The grounding component to which the part is connected can be set in the cutout device via the insulating rod. Moreover, the terminal connection part of this earthing | grounding short circuit instrument cannot be connected to the conduction | electrical_connection terminal part of a component for conduction | electrical_connection, but can be connected only to the terminal part for earth | grounding of the component for grounding of a cutout apparatus. Therefore, do not inadvertently connect a grounding short circuit device to the conduction parts of the cutout device, and safely ground and short-circuit the load device side of the cutout device by the so-called indirect hot wire method. Can do.

  An invention of a ground short-circuit apparatus that solves the above problems includes a power supply connecting portion that connects an electric wire from a commercial power source, a load connecting portion that connects an electric wire to the load device side, and between the power supply connecting portion and the load connecting portion. A cut-out device comprising a conducting portion that is made conductive by interposing a fuse to a grounding short-circuit device that grounds the load connecting portion with the conducting portion removed, and is connected to the terminal portion that conducts to the load connecting portion A terminal connection portion to be connected; a grounding portion for grounding in order to release accumulated charges; and a cable for conducting between the terminal connection portion and the grounding portion. An attachment portion attached to the tip of the rod is disposed on the distal end side of the instrument main body arranged on the proximal end side, and the posture with respect to the attachment portion is fixed.

  In the present invention, a grounding short-circuiting instrument can be attached to the tip of the insulating rod, the position of the terminal connection portion of the grounding short-circuiting instrument is stabilized against the operation of the insulating rod, and the terminal connection portion is loaded on the cutout device. It can be connected directly to the terminal on the device side. Therefore, the load device side of the cutout device can be safely grounded and short-circuited by a so-called indirect hot wire method.

  Thus, according to the present invention, it is possible to ground the load device side of the cutout device by attaching the grounding short circuit device to the tip of the insulating rod and using the indirect hot wire method. In addition, the terminal connection portion of the grounding short-circuit apparatus can be disabled from being connected to the conduction terminal portion of the conduction component, and connection can be permitted only to the grounding terminal portion of the grounding component attached to the cutout device. Therefore, the grounding work of the cutout device can be performed safely.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings. 1-3 is a figure which shows an example of the cutout apparatus to which one Embodiment of the earthing short circuiting instrument and grounding components based on this invention is applied, FIGS. 4-9 is the earthing short circuiting apparatus of the one embodiment, and FIG. It is a figure which shows the components for grounding.

  First, the cutout device will be described. 1 and 2, the cut-out device 10 is formed into a mounting bracket 10a that is attached to a brace arm of a power pole for installing a distribution line from a commercial power source, and a box shape that is open on one side. A main body 11 made of porcelain 10a fixed to the outer surface of the bottom side, and a lid portion (conducting portion) 12 made of porcelain formed in a lid shape capable of closing the open surface of the main body 11; It has.

  The main body 11 is installed in the vicinity of the utility pole transformer by the mounting bracket 10a so as to be interposed between the distribution lines that supply the power generated by the commercial power source to each load device. The power supply connection part 13 which connects the branched electric wire, and the load connection part 14 which connects the electric wire from the transformer installed in the front | former stage of a load apparatus are provided.

  The lid portion 12 is designed to be detachable from a fuse cylinder 17 that secures power supply by bringing the conductive blades 15 and 16 into conductive contact with the power connection portion 13 and the load connection portion 14 of the main body portion 11. 17, the fuses 18 are electrically connected between the conductive blades 15 and 16 connected to the power supply connection unit 13 and the load connection unit 14.

  As shown in FIG. 3, the fuse cylinder 17 has conductive blades 15 and 16 erected on the peripheral surface of the cylindrical main body 17 a, and a head 17 b is attached to the tip of the cylindrical main body 17 a. Yes. The head 17b is built in such a manner that the entire length of the head 17b can be extended and retracted by extending and retracting in the extending direction of the cylindrical main body 17a, and the head 17b is biased by a biasing means such as a spring (not shown) in the extending direction.

  The fuse 18 is connected to the tip of a conductor rod (not shown) that is inserted into the cylindrical body 17 a of the fuse cylinder 17. The fuse 18 is electrically connected to the conductive blade 15 at the gripping portion 18a at the rear end of the conductor rod, and is electrically connected to the conductive blade 16 from the tip of the conductor rod to the outer surface of the cylindrical body 17a. The conductive blades 15 and 16 (connection portions 13 and 14) are electrically connected to each other by being electrically connected to the conductive piece 18b that is drawn out to the conductive blade 16 and is in conductive contact with the conductive blade 16.

  Further, the box-shaped cutout device 10 has a connecting shaft support that allows one side of the lid 12 to be rotated by a rotating shaft 11 a disposed on one side of the open surface of the main body 11. The main body part 11 and the lid body part 12 are connected to the connection parts 13 and 14 by sandwiching the conductive blades 15 and 16 so that the main body part 11 is closed by the lid body part 12. A rib-shaped portion 12b through which the hook hole 12a passes is provided upright on the other side of the front outer surface of the lid portion 12 while being able to be maintained.

  Accordingly, the cutout device 10 needs to be installed at a high place such as a utility pole so that a general person does not touch it. However, when performing work such as grounding short-circuiting, the cutout device 10 is attached to the tip of an insulating operation rod described later. By hooking a hook (not shown) or the like into the hooking hole 12a and pulling or pushing it up, the lid 12 can be rotated and moved away from the open surface of the main body 11 to open and close.

  The cutout device 10 connects the conductive blades 15 and 16 to the connection portions 13 and 14 of the main body 11 when the lid 12 closes the open surface side of the main body 11 and closes it. Thus, the power connection part 13 and the load connection part 14 can be conducted through the fuse cylinder 17. On the other hand, when a short circuit accident or the like occurs on the load device side, the fuse 18 of the fuse cylinder 17 is blown by overcurrent, so that the head 17b moves in the extending direction and the blown fuse 18 is removed from the conductive piece 18b. By separating, it is possible to prevent continuity between the power supply connection portion 13 and the load connection portion 14 and prevent the influence of a short circuit accident or the like from spreading to the commercial power supply side.

Reference numeral 10b in the figure denotes a varistor (ZnO ₂ ) element having one end electrically connected to the load connecting portion 14, and 10c is electrically connected to the mounting bracket 10a and a terminal at the other end of the varistor element 10b. It is a counter electrode plate which forms an air gap between. Thereby, when there is a lightning strike or the like on the distribution line from the commercial power source, the cutout device 10 generates a discharge in the air gap between the varistor element 10b and the counter electrode plate 10c to release the lightning strike to the ground. At the same time, the discharge voltage is kept high by the varistor element 10b to prevent a continuity from being generated by the power from the commercial power source.

  Next, an embodiment of the present invention will be described. In FIG. 4, the lid dummy 22 includes a conductive blade 26 connected to the load connecting portion 14 on the main body 11 side and an insertion hole provided on the main body 11 side, as in the prior art shown in FIG. And a dummy blade 28 made of an insulating material to be inserted into 19. The lid dummy 22 is attached to the main body portion 11 by connecting the conductive blade 26 to the load connecting portion 14 so as to cover the main body portion 11 and inserting the dummy blade 28 into the insertion hole 19. It is possible to maintain the connection state between the load connection portion 14 and the conductive blade 26 while blocking from the power supply connection portion 13.

  On the outer surface of the lid dummy 22, a terminal 21 made of a conductive material such as metal, which is electrically connected to the conductive blade 26 and realizes electrical connection to the load device side via the load connecting portion 14, is disposed. The terminal 21 is engraved with a female screw 21a that can be connected to a male screw 32a of a terminal connecting portion 32 of a grounding short circuit device 30 to be described later. That is, the lid body dummy 22 is a terminal 21 designed so as not to connect the terminal 132a (male screw) as the conduction terminal portion of the power application terminal (conduction part) 132 shown in FIG. The terminal 21 (female screw) as a grounding terminal part designed so that only the terminal connection part 32 (male screw) can be connected constitutes a non-conductive part grounding component arranged on the outer surface. Here, the terminal 21 has a female screw 21a formed on the bottom surface of a receiving portion 21b formed in a cylindrical shape with a bottom so that the terminal connecting portion 32 of the grounding short circuit device 30 can be received.

  Thereby, the terminal connection portion 32 of the terminal 21 is connected to the female screw 21a of the terminal 21 by rotating the terminal connection portion 32 of the connecting rod 31 in the terminal 21 of the lid dummy 22 while being accommodated in the accommodation portion 21b. The male screw 32a can be screwed and attached, so that it is possible to avoid common use with the terminal 132a (male screw) of the power-charging terminal 132 used when performing a so-called accident point search operation or the like. . Therefore, it is possible to eliminate the possibility that the terminal connection portion 32 of the grounding short-circuiting instrument 30 is connected to the power application terminal 132 and the commercial power source side of the cutout device 10 is grounded and short-circuited.

  As shown in FIG. 5, the grounding short-circuit device 30 is fixedly attached to the connecting rod 31 formed in a cylindrical shape so as to be grippable and the tip of the connecting rod 31 in the same manner as the prior art shown in FIG. 11. A terminal connection portion 32 connected to the terminal 21 of the lid dummy 22; a joint (attachment portion) 33 fixed to the rear end portion of the connection rod 31 and capable of attaching a distal end portion of an insulating operation rod 40 described later; A clip (grounding portion) 34 connected to a ground conductor embedded in the ground, a cable 35 for electrically connecting the terminal connecting portion 32 and the clip 34, and a hook 38 that can be hooked on an armrest arm of a utility pole, etc. And a string 39 for connecting the cable 35 and the hook 38 to each other.

  Since a plurality of connecting rods 31 are installed so that the cutout device 10 corresponds to a plurality of electric wires installed on a power pole or the like, a plurality of connecting rods 31 (three sets are shown in the figure) are prepared. In addition, the terminal connection portion 32 is conductively connected to each of the cables 35a to 35c branched from the cable 35 from the clip 34 into three, and disposed at the tip portion.

  The connecting rod 31 is formed by molding an insulating material, for example, a hard resin material into a cylindrical shape so that the cables 35a to 35c that are conductively connected to the terminal connecting portion 32 at the distal end portion can be housed and gripped. The cables 35 a to 35 c are internally provided from the terminal connection portion 32 at the front end portion to the front side of the joint 33 on the rear end side, and are led out from an opening portion opened in the vicinity of the joint 33.

  The terminal connection portion 32 is formed in a short columnar shape so as to be able to be accommodated in the cylindrical accommodation portion 21b of the terminal 21 of the lid dummy 22, and a female screw 21a of the terminal 21 is provided on the end surface on the front end side. A male screw 32a to be screwed to is erected. The terminal connection portion 32 is made of a conductive material such as a metal so as to be short-circuited to the ground via the clip 34 and the cables 35a to 35c.

  The joint 33 is formed in a bottomed cylindrical shape that opens on the rear end surface side of the connecting rod 31, and can be attached by inserting the distal end portion of the insulating operation rod 40 from the extending direction of the proximal end portion side of the connecting rod 31. . Further, the peripheral surface portion of the joint 33 includes a first cutout portion 33a cut out toward the insulating operation rod 40 side, and a second cutout portion 33b bent continuously in the orthogonal direction to the first cutout portion 33a. And a pin 41 of an insulating operation rod 40 to be described later can be attached so as not to be pulled out (cannot be dropped off) by entering and hooking a pin 41 of the insulating operation rod 40, which will be described later, from the first notch 33a to the back of the second notch 33b. it can.

  That is, the connecting rod 31 is connected between the terminal connecting portion 32 and the joint 33 by a hard resin material or the like, and the posture of the lid dummy 22 with respect to the insulating operation rod 40 (joint 33) (the posture of the terminal connecting portion 32 with respect to the posture). ) Can be fixed.

  As shown in FIG. 6, the insulating operation rod 40 is provided with a pin 41 to be engaged and engaged with the notches 33 a and 33 b of the joint 33, and a non-slipable non-slipable material for preventing slipping. A grip portion 42 on the base end side to be gripped and umbrella covers 43 and 44 attached to an intermediate portion are provided, and the whole is made of an insulating material such as plastic to ensure insulation.

  The pin 41 is provided opposite to the side surface of the distal end portion of the insulating operation rod 40, and is fixed in a protruding shape on the opposite side, so that the pin 41 is inserted into the two notches 33a and 33b of the joint 33 of the connection rod 31. You can enter and engage. The umbrella covers 43 and 44 are disposed at two positions, the distal end side and the proximal end side, in the middle portion. The umbrella cover 43 on the distal end side drips moisture from the connecting rod 31 side, and the umbrella on the proximal end side. The cover 44 indicates the limit position where the work can be performed safely, and the safety during the work is ensured.

  Accordingly, the grounding short-circuiting device 30 attaches the terminal 21 of the lid dummy 22 to the terminal connection portion 32 of the connection rod 31 and attaches the tip of the insulating operation rod 40 to the joint 33 of the connection rod 31, thereby FIG. As shown in FIG. 2, the lid attached to the connecting rod 31 at the distal end portion of the insulating operation rod 40 is attached to the main body portion 11 that is opened by rotating the lid body portion 12 of the cutout device 10 installed at a high place. The body dummy 22 can be safely attached. Therefore, when performing maintenance or the like of the transformer or the like, the conductive blade 26 of the lid dummy 22 is safely connected to the load connecting portion 14 on the main body 11 side of the cutout device 10, and the terminal 21, the cable 35, A grounding state via the clip 34 can be established.

  Further, as shown in FIG. 8, the grounding short-circuit device 30 is a conventional cutout device 50 that is designed to have a structure in which a cylindrical body portion 51 is closed by a lid portion (conduction portion) 52. Similar to the grounding short-circuit instrument 110, the lid 52 is removed, and the connection between the power connection 53 and the load connection 54 via the fuse cylinder 57 is eliminated, and then the connecting rod 31 is inserted into the main body 51. Just by setting, the receiving shoulder 54a of the load connecting portion 54 can be brought into pressure connection with the conducting shoulder portion of the terminal connecting portion 32, and the load device side can be grounded via the clip 34 or the cable 35. Safety can be ensured.

  At the same time, this cylindrical cutout device 50 also connects a terminal 172a (male screw) as a conduction terminal portion of a power application terminal (conduction part) 172 used when performing a so-called accident point search operation or the like. The rod 31 is not screwed and attached to the male screw 32a of the terminal connection portion 32 of the rod 31. Therefore, it is possible to eliminate the possibility that the terminal connection portion 32 of the ground short-circuiting instrument 30 is connected to the power application terminal 172 and the commercial power supply side of the cutout device 50 is short-circuited to the ground.

  At this time, the grounding short-circuiting instrument 30 uses the hook 38 connected to the string 39 from the branch point of the cable 35 to the cables 35a to 35c as an armrest arm of a utility pole where the cutout devices 10 and 50 are installed. It is possible to prevent the connecting rod 31 from being inadvertently dropped by hooking it using a remote control tool such as Yatco.

  Here, after the insulating operating rod 40 is rotated by causing both the pins 41 to enter the notches 33a and 33b of the joint 33 while the protrusion 45 at the tip end is sunk against the elastic force of the built-in spring. When the force to be entered is released, the protrusion 45 protrudes by the elastic force of the spring and pushes out the joint 33, so that the pin 41 can be engaged in the engagement groove 33c bent from the notch 33b so as not to be detached. it can. Further, the insulating operation rod 40 is rotated so that the grip 46 screwed into a screw shape engraved at the center portion is rotated toward the joint 33 so that the pin 41 is not detached from the engagement groove 33c and does not rotate. Therefore, it is possible to reliably prevent the relative rotation with respect to the joint 33 from coming off.

  Further, a temporary cleat (supporting device) 60 shown in FIG. 9 is installed on the armature arm of the utility pole in which the cutout devices 10 and 50 are installed, and the connecting rod 31 of the grounding short circuit device 30 is temporarily placed. be able to.

  The temporary cleat 60 includes a support main body 61 having a U-shape when viewed from the side, an extension surface 62 extending laterally from the upper portion of the support main body 61, and the extension surface 62. A plurality of mounting parts 63 fixed to the support main body 61 so as to be positioned on the same side as the lower side and capable of mounting the connecting rod 31 of the grounding short circuit device 30, and disposed below the support main body 61. And a joint 64 to which the tip of the insulating operation rod 40 can be attached.

  The support main body 61 faces the side surface of the armrest arm of the utility pole and is fixed to the side plate 61a on which the extension surface portion 62 and the mounting portion 63 are fixed on the opposite side, and two upper portions of the side plate 61a. A pair of rod-like upper plates 61b that extend downward in the upper surface direction of the arm metal arm and projecting downward at the tip side, and a lower surface where the joint 64 is attached to the lower surface of the arm arm of the utility pole so as to be movable up and down. It consists of a plate 61c. The support main body 61 is inserted between the upper plate 61a and the lower plate 61c so that the armrest arm of the utility pole is positioned within the U-shape, and the tip 61d of the pair of upper plates 61b is hooked. Can be attached to the armrest arm of the utility pole.

  The extension surface portion 62 is formed with a notch portion 62a in which three portions on the side away from the support main body portion 61 are notched in a U shape, and the grounding short-circuit device 30 is formed in the notch portion 62a of the extension surface portion 62. The vicinity of the terminal connecting portion 32 of the connecting rod 31 in the standing state can be accommodated and supported.

  Three mounting portions 63 are formed in a U-shape, and three mounting portions 63 are fixed to the side surface of the support main body portion 61 so that the side away from the support main body portion 61 opens at the same position as the cutout portion 62a of the extension surface portion 62. The mounting portion 63 is inserted between the flange-shaped portion 31a and the flange-shaped portion 31b of the connecting rod 31 in a state where the grounding short circuit device 30 is upright, and mounts and supports the connecting rod 31. be able to.

  Similarly to the joint 33 of the connecting rod 31 of the grounding short-circuiting device 30, the joint 64 is formed with notches 33a and 33b and an engagement groove 33c and is fixed to the lower portion of the bolt 64a. The nut 61e fixed to the lower plate 61c of the main body 61 is screwed so as to be movable in the vertical direction. A holding plate 64b that moves up and down within the U-shape of the support main body 61 (upper part of the nut 61e) is rotatably attached to the tip of the bolt 64a.

  As a result, the temporary placement cleat 60 is provided with the cutout devices 10 and 50 in a state where the three connection rods 31 of the grounding short-circuiting device 30 are set by attaching the tip of the insulating operation rod 40 to the joint 64. It can be attached to the armrest arm of the utility pole. Thereafter, the work of grounding the cutout devices 10 and 50 can be easily performed by sequentially attaching the distal end portions of the insulating operation rods 40 to the joints 33 of the connecting rods 31 of the grounding / shorting device 30.

  As described above, in the present embodiment, the connecting rod 31 of the grounding short-circuiting instrument 30 is attached to the distal end portion of the insulating operation rod 40 in a stable posture, and the lid dummy attached to the terminal connecting portion 32 at the distal end of the connecting rod 31. 22 can be easily set in the main body 11 of the cutout device 10, or the connecting rod 31 can be directly set in the main body 51 of the cutout device 50. Thereby, the operation | work which earth | grounds the load connection parts 14 and 54 of the cutout apparatuses 10 and 50 via the cable 35 etc. of the earthing | grounding short circuit instrument 30 can be performed easily and safely. Therefore, the grounding work of the cutout devices 10 and 50 can be safely performed by a so-called indirect hot wire method without handling the connecting rod 31 of the grounding short-circuiting device 30 by hand.

  At this time, only the terminal 21 of the lid dummy 22 can be connected to the terminal connection portion 32 of the connecting rod 31 of the grounding short-circuiting device 30, which is used when performing so-called accident point search or the like. The terminals 132a and 172a of the terminals 132 and 172 are not screwed and connected. Therefore, the possibility of inadvertently short-circuiting the power connection portions 13 and 53 of the cutout devices 10 and 50 to ground can be eliminated, and the cutout devices 10 and 50 can be safely grounded.

  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.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows an example of the box-type cutout apparatus to which one Embodiment of the earthing | grounding short circuit instrument and earthing | grounding component based on this invention is applied, and is a partial cross section side view which shows the schematic whole structure. It is a top view which shows the cover body of the cutout apparatus. It is a figure which shows the whole structure of the fuse cylinder of the cutout apparatus, (a) is the top view, (b) is the side view. It is a figure which shows the whole structure of one Embodiment of the component for earthing | grounding, (a) is the top view, (b), (c) is a side view from a different direction. It is a front view which shows the whole structure of one Embodiment of the earthing | grounding short circuit instrument. It is a front view which shows the whole structure of an example of the insulating rod which attaches the earthing | grounding short circuit instrument. It is a partial cross section state figure explaining attachment to the cutout device of the parts for grounding by the grounding short circuit instrument. It is a figure which shows an example of the cylindrical cutout apparatus which applies one Embodiment of the earthing | grounding short circuit instrument, and is a partial cross section state figure explaining attachment to the cutout apparatus of the earthing short circuit apparatus. It is a figure which shows an example of the apparatus which supports one Embodiment of the earthing | grounding short circuit instrument, (a) is the top view, (b) is the side view. It is a partially cutaway side view explaining the box-shaped cutout device. It is a figure which shows the whole prior art structure of the components for grounding set to the box-shaped cutout apparatus, (a) is the top view, (b) is the side view. It is a front view which shows the whole prior art structure of the earthing | grounding short circuit instrument. It is a side state figure explaining attachment to the box type cutout device of the part for grounding by the grounding short circuit instrument of the prior art. It is a figure explaining the accident point exploration applied to the box-shaped cutout device, (a) is a side state diagram explaining the setting of the charging terminal to the cutout device by the attachment used for the exploration, (b) These are top views which show the whole structure of the charging terminal. It is a partial cross section side view explaining the cylindrical cutout device. It is a partial cross section side view explaining attachment to the cylindrical cutout device of the grounding short circuit instrument of the prior art. It is a figure explaining the accident point search applied to the cylindrical cutout device, (a) is a partial cross-sectional side view explaining the setting of the charging terminal to the cutout device by the attachment used for the search, b) is a plan view showing an overall configuration of the power-charging terminal.

Explanation of symbols

10, 50 Cutout device 11, 51 Main body 11a Rotating shaft 12, 52 Lid 13, 53 Power connection 14, 54 Load connection 15, 16, 26 Conducting blade 17 Fuse cylinder 18 Fuse 19 Insert hole 21 Terminal 21a Female thread 21b Storage section 22 Dummy dummy 28 Dummy blade 30 Grounding short circuit tool 31 Connecting rod 32 Terminal connection section 32a Male thread 33 Joint 33a, 33b Notch 33c Engaging groove 34 Clip 35, 35a-35c Cable 38 Hook 39 String 40 Insulating operation rod 41 Pin 42 Grip portion 45 Projection 46 Grip 50 Cutout device 53a Insertion terminal 54a Receiving terminal 57 Fuse tube 60 Cleat 61 Support body portion 61e Nut 62 Extension surface portion 62a Notch portion 63 Mounting portion 64 Joint 64a Bolt 64b Holding plate 130 Attachment 131 Terminal contact Consecutive portions 132 and 172 Electric charging terminals 132a and 172a Terminals 135 and 136 Conductive blades

Claims (4)

A power supply connection part for connecting a wire from a commercial power supply, a load connection part for connecting a wire to the load device side, and a conduction part for interposing a fuse between the power supply connection part and the load connection part A grounding short-circuit device for grounding the load connecting part with a non-conducting part in which a fuse is removed from the conducting part instead of the conducting part,
A terminal connection part connected to a terminal part arranged on the outer surface of the non-conduction part and conducting to the load connection part, a ground part for grounding in order to release accumulated charges, and a space between these terminal connection part and the ground part A cable for conducting,
The terminal connection portion is disposed on the distal end side of the instrument body in which the attachment portion attached to the distal end of the long insulating rod is disposed on the proximal end side, and the posture with respect to the attachment portion is fixed. To ground short circuit appliance. A power supply connection part for connecting electric wires from a commercial power supply, a load connection part for connecting electric wires to the load device side, and a conduction part for interposing a fuse between the power supply connection part and the load connection part A grounding component that is attached to a cut-out device provided with, instead of a conducting portion when the load connection portion is grounded via a ground short-circuit device,
A grounding short-circuit device that is configured as a non-conducting part in which a fuse is removed from a conducting part and cannot be connected to a conducting terminal part that is arranged on the outer surface of a conducting part that conducts between a power supply connecting part and a load connecting part. A grounding terminal part, which is designed to be connectable to each other and is connected to the load connection part, is disposed on the outer surface. A power supply connection part for connecting a wire from a commercial power supply, a load connection part for connecting a wire to the load device side, and a conduction part for interposing a fuse between the power supply connection part and the load connection part A grounding short-circuit device that attaches to a cutout device comprising:
It is composed of a grounding part as a non-conducting part in which a fuse is removed from a conducting part, and a grounding short-circuit device that is arranged on the outer surface of the grounding part and connected to a terminal part that conducts to a load connecting part and grounded
The grounding part is designed so that the connection part of the grounding short circuit device that cannot be connected to the conduction terminal part arranged on the outer surface of the conduction part for conducting between the power supply connection part and the load connection part can be connected to the load. While the grounding terminal portion that conducts to the connecting portion is arranged on the outer surface,
The grounding short circuit device includes a terminal connecting part connected to the grounding terminal part of the grounding part, a grounding part grounded to release the accumulated electric charge, and a cable that conducts between the terminal connecting part and the grounding part. And comprising
The terminal connection portion of the grounding short-circuiting instrument is disposed on the distal end side of the instrument body in which the attachment portion to be attached to the distal end of the long insulating rod is disposed on the proximal end side, and the posture with respect to the attachment portion is fixed. A grounding short-circuit device characterized by comprising: A power supply connection part for connecting a wire from a commercial power supply, a load connection part for connecting a wire to the load device side, and a conduction part for interposing a fuse between the power supply connection part and the load connection part A grounding short-circuit device for grounding a load connection part in a state where the conduction part is removed to a cutout device comprising:
A terminal connection portion connected to the terminal portion that conducts to the load connection portion, a grounding portion that is grounded to release the accumulated charge, and a cable that conducts between the terminal connection portion and the grounding portion,
The terminal connection portion is disposed on the distal end side of the instrument body in which the attachment portion attached to the distal end of the long insulating rod is disposed on the proximal end side, and the posture with respect to the attachment portion is fixed. To ground short circuit appliance.

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