JP2013013173A - Earth cable mounting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth cable mounting tool capable of mounting an earth cable on a linear conductive body such as an overhead wire or an arcing horn by a simple operation.SOLUTION: An earth cable mounting tool 10 includes: a rod-shaped handle part 12 electrically insulated; two arm parts (a fixed arm body 20 and a rotary arm body 22) provided on a side of a tip end 12a of the handle part 12, for holding a linear conductive body A; and an earth cable 18 electrically connected to the arm parts. Tip end sides of both arm parts pivotably supported by a rotary shaft are openable and closable. An operation body 26 is provided in such a manner that a top side part 26a reciprocates in an extending direction of the handle part 12 in a region between the two arm parts and on tip end sides of the arm parts, and the operation body 26 is urged upward. The rotary arm body 22 is rotated and closed in an interlocking fashion with the downward movement of the operation body 26 against the urging to be able to hold the linear conductive body A.

Description

  The present invention relates to a ground wire attachment device for attaching a ground wire to an arc horn provided on an overhead wire or an insulator in order to prevent an electric shock accident of an operator when working on the overhead wire.

  In the inspection of overhead wires and electrical work, work is performed with the work site in a power failure state for safety. However, an induced current may be induced in an overhead electric wire even when an operation such as an inspection of the overhead electric wire in a power failure state is performed. In order to prevent an electric shock accident due to this induced current, a ground wire connected in advance to the ground side is attached to an arc horn provided on an overhead wire or an insulator, and the induced current is released to the ground side. I am doing so.

  For the attachment of the ground wire, for example, an earth hook rod having a hook portion for hooking an overhead electric wire to the tip of a long rod-shaped body and the hook portion of the hook portion being configured to be openable and closable is used. Used (for example, Patent Document 1).

  FIG. 4 is a diagram for explaining an operation of attaching the ground wire to the overhead electric wire A using the conventional ground hook rod 50. As shown in the drawing, a movable hook member 56 is pivotally supported on a stationary hook member 54 attached to a distal end portion 52 a of a long handle portion 52 of an earth hook rod 50, thereby constituting a hook portion 58. The tip 52a is screwed to a cylindrical female screw member 60 provided inside the immovable hook member 54. One end of a ground wire 62 is screwed to the outer surface of the immovable hook member 54, and the other end is connected to a ground wire connecting member (not shown) embedded in the ground.

  The worker holds the base end portion of the ground hook rod 50 on the armature of the steel tower that supports the overhead electric wire, and once passes through the hook portion 58 from the lower side to the upper side of the overhead wire A to be attached to the ground wire 62. To perform the operation. Next, by performing an operation of moving the hook portion 58 downward while moving it horizontally, the overhead electric wire A is introduced into the hook portion 58 from the hook 64 of the narrow hook portion 58 as shown in the figure. Then, by rotating the tip 52a together with the handle 52 with respect to the female screw member 60 whose rotation is restrained by the overhead electric wire A, it is interlocked with the movement of the female screw member 60 in the direction of the arrow 300 to be movable. The hook member 56 is rotated in the arrow 400 direction. Thereby, the shed 64 is closed, and the installation work of the ground wire 62 to the overhead electric wire A is completed.

Japanese Utility Model 06-060459

  However, according to the earth hook rod described in Patent Document 1, the operator has a base end portion of a long handle in an unstable high work place on the armrest of a steel tower, It is necessary to perform a difficult operation of moving the hook portion attached to the tip portion on the side in a proper manner and introducing the overhead electric wire A into the hook portion from the narrow opening. Further, it is necessary to rotate the tip of the handle and close the shed, and it takes a lot of time to attach the ground wire.

  This invention is made | formed in view of this subject, The objective is related with the earth wire attachment tool which can attach an earth wire with respect to linear conductors, such as an overhead electric wire or an arc horn, by simple operation | movement.

  The invention according to claim 1 for solving the above-described object includes a rod-shaped handle portion that is electrically insulated and protected, a holding portion that is provided on a tip end side of the handle portion and holds the linear conductor, An earth wire attachment device having an earth wire electrically connected to the holding portion, wherein the holding portion is pivotally attached to a rotating shaft so that a distal end side thereof can be freely opened and closed, and the linear conductor is in a closed state. The upper arm portion is provided so as to reciprocate in the extending direction of the handle portion between the two arm portions and in the region on the distal end side of the arm portion. An operating body, and a first urging means for urging the operating body upward, wherein the operating body and the arm portion are configured to resist the urging force of the first urging means. In conjunction with the movement of the body being pushed down, the arm portion has an interlocking structure that rotates to enter the closed state.

  According to this configuration, the operator holds the base end of the handle portion of the ground wire attachment device and opens the distal end side of the arm portion, and the upper side portion of the operation body is linearly formed from the lower side of the linear conductor. The linear conductor can be clamped only by pressing linearly against the conductor and pressing the operating body down against the clamping portion. Further, when the pressing is stopped, the operating body moves upward, and the distal end side of the arm portion is opened again. Therefore, the linear conductive member is simply pulled back from the linear conductor downward. The clamping part can be separated from the body. Therefore, the clamping part can pinch or separate the linear conductor by an extremely simple operation of bringing the operating body linearly close to or away from the linear conductor in the extending direction of the handle. It becomes possible.

  According to a second aspect of the present invention, in the ground wire attachment device according to the first aspect, the interlocking structure has a structure in which a lower portion of the operating body and a lower portion of the rotating shaft of the arm portion are engaged with each other. The engaging structure is configured such that the lower part of the operating body engages with the lower part of the rotation shaft of the arm portion at a position where the operating body has been moved down by a predetermined amount. Stopping at the moving position to maintain the closed state, in the closed state, by applying a force to the distal end side of the arm portion to open the distal end side of the arm portion, the engagement is released, It has a structure that allows the operating body to move up.

  According to this configuration, since the operation body is pushed down by a predetermined amount by the linear conductor, the holding portion can maintain the state where the linear conductor is held, so that the holding state can be maintained by pressing the operation body once. Can be maintained. Furthermore, even when the force by which the linear conductor pushes down the operating body is weakened in the sandwiched state, or when the force becomes zero, the linear conductor is maintained while being sandwiched by the sandwiching portion. Therefore, for example, the possibility that the linear conductor and the sandwiching portion are separated during ground wire installation work due to force majeure is reduced.

  According to a third aspect of the present invention, in the ground wire attachment device according to the first or second aspect, one of the arm portions is a non-rotating fixed arm body, and the other of the arm portions is the rotating portion. A rotating arm body rotatable about an axis, the rotating arm body being urged by a second urging means so that a distal end side of the arm portion is in a closed state, and the operating body The shape of the lower part protrudes in a direction intersecting with the extending direction of the handle part and has a flat upper surface part on the tip side, and the flat upper surface part is a lower part of the rotating shaft of the rotating arm body. A projecting portion for restraining the operating body at the lower position of the operating body, and a base end side of the projecting section, and a rotating shaft of the rotating arm body at the operating position of the operating body. A recess that maintains the distal end side of the arm portion in an open state against the urging force of the second urging means by engaging with the lower portion. , Characterized by having a.

  According to this configuration, the open / closed state of the distal end side of the arm portion is adjusted by contacting or releasing the flat upper surface portion of the operating body with the lower portion of the rotating shaft of the rotating arm body, This is done by engaging or disengaging the concave portion of the body and the lower portion of the rotating shaft of the rotating arm body. That is, the complicated adjustment described above can be performed by the interaction of the two members, that is, the rotating arm body and the operating body, so that the structure of the maintenance adjustment mechanism in the open state and the closed state on the distal end side of the arm portion is simplified. Has been.

  According to a fourth aspect of the present invention, in the ground wire attachment device according to the third aspect of the present invention, the apparatus includes a casing to which the fixed arm body and the operating body are respectively attached. And the tip of the handle portion penetrates the casing and protrudes outward from the casing by the screwing operation, and the tip of the handle portion is in the closed state in the protruding state. It contacts with the said rotation arm body, and the said closed state is maintained.

  According to this configuration, in the closed state on the distal end side of the arm portion, the operator rotates the handle portion in a direction in which the tip end of the handle portion protrudes with respect to the casing, and the tip end of the handle portion is turned to the rotating arm body. The holding state of the linear conductor by the holding portion can be maintained with a simple operation of contacting. Therefore, even when the operator accidentally releases his hand from the handle or accidentally pulls the handle downward, the holding state of the linear conductor by the holding portion is maintained, which is safe and secure. .

  As described above, according to the present invention, the linear conductor can be operated with an extremely simple operation in which the tip end side of the handle portion is linearly brought close to or separated from the linear conductor in the extending direction of the handle portion. Can be clamped or separated by the clamping unit. Therefore, the workability of attaching the ground wire to the linear conductor is greatly improved.

(A) It is the schematic for demonstrating the ground wire attachment tool 10 which concerns on 1st Embodiment of this invention. (B) Similarly, it is the schematic which shows the state which the clamping part 14 of the earth wire attachment instrument 10 clamped the linear conductor A. FIG. (A) Similarly, it is the schematic which shows the interaction of the operation body 26 and the rotation arm body 22 in the open state of the front end side of the arm part of the earth wire attachment instrument 10. FIG. (B) It is the schematic which shows the interaction of the operation body 26 and the rotation arm body 22 in the closed state of the front end side of the arm part of the earth wire attachment instrument 10 similarly. (A) It is the schematic for demonstrating the ground wire attachment tool 40 which concerns on 2nd Embodiment of this invention. (B) Similarly, it is a figure which shows the state which the clamping part 14 of the earth wire attachment instrument 40 clamped the linear conductor A. FIG. It is a figure for demonstrating the attachment of the earth wire to the overhead electric wire by the conventional earth hook stick | rod 50. FIG.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
The first embodiment of the ground wire attachment device of the present invention is connected to the non-insulated linear conductor A on the armature of a steel tower that supports an overhead electric wire (hereinafter referred to as a linear conductor A). An example of a ground wire mounting tool for mounting the cable will be described with reference to FIGS. 1 and 2. FIG. 1 (A) is a schematic diagram for explaining the ground wire attachment device 10 according to the first embodiment of the present invention, and FIG. 1 (B) is also a holding portion 14 of the ground wire attachment device 10. FIG. 2 is a schematic view showing a state in which a linear conductor A is sandwiched. As shown in FIG. 1A, the ground wire attachment device 10 includes a substantially rectangular casing 16 having a sandwiching portion 14 for sandwiching a non-insulated linear conductor A on the distal end 12a side of a rod-shaped handle portion 12. Is attached. The casing 16 is conductive, and one end of a ground wire 18 is connected to the outer surface of the casing 16, whereby the sandwiching portion 14 is electrically connected to the ground wire 18. The other end of the ground wire 18 is connected to a ground wire connecting member (not shown) embedded in the ground.

  The sandwiching portion 14 has two arm portions, and one of the arm portions is a bar-shaped member formed in an arc shape, and has a concave surface 20a facing the other of the arm portions on the distal end side. It is the non-rotating fixed arm body 20 which has the fixing | fixed part 20b fixed to the inner surface of the base end side. The other arm portion has a tip portion formed in an arc shape so as to have a concave surface 22a opposite to the concave surface 20a, and a bent portion positioned substantially at the center is rotated with respect to the fixed arm body 20 by a hinge 24. This is a rotating arm body 22 that is pivotally mounted and has a base end portion that extends straight into the casing 16 as it is.

  The base end of the rotating arm body 22 is in contact with a flat upper surface portion 26e of the operating body 26 to be described later, and constitutes a protrusion 22b that is also engaged with the concave portion 26d of the operating body 26. Then, the rotating arm body 22 has its distal end always rotated to the concave surface 20a side of the fixed arm body 20 by a second urging means (not shown) described later, that is, the distal end side of the arm portion is moved. It is energized to be in the closed state.

  In addition to the clamping portion 14 described above, the casing 16 has an upper side that reciprocates in the extending direction of the handle portion 12 between the fixed arm body 20 and the rotating arm body 22 and in the region on the distal end side of both arm portions. The operating body 26 includes a portion 26a. The operating body 26 extends in a direction orthogonal to the extending direction of the handle portion 12, and has a length that is substantially equal to the widest width between the concave surface 20a and the concave surface 22a in the open state on the distal end side of the arm portion. It has a rod-shaped collar part 26b. The surface of the flange portion 26b on the arrow 100 direction side in the drawing is the upper side portion 26a. Further, the operating body 26 extends in the extending direction of the handle portion 12 from the substantially central portion of the extending portion 26b to the inside of the casing 16 and is folded back in a substantially U shape inside the casing 16 while It has the protrusion part 26c which protrudes in the direction which cross | intersects an expansion | extension direction. The base end side of the protruding portion 26c is the concave portion 26d formed in the above-described substantially U shape, and the distal end side extends linearly from the end portion of the concave portion 26d in a direction perpendicular to the extending direction of the handle portion 12. This is a flat upper surface portion 26e. Further, the operating body 26 is moved in the direction of arrow 100, that is, from the proximal end 12b of the handle portion 12 to the distal end 12a by a spring 28 (first urging means) sandwiched between the recess 26d and the bottom surface 16a of the casing 16. It is urged | biased by the direction which the handle | pattern part 12 expands. When the operating body 26 is biased by the spring 28 and is in the pushed-up position, the protrusion 22b of the rotating arm body 22 is engaged with the recess 26d, so that the rotation of the rotating arm body 22 is second. The front end side of the fixed arm body 20 and the rotating arm body 22, that is, the front end side of the arm portion is maintained in an open state. In addition, the casing 16 has a female screw portion 16b provided on the bottom surface 16a side thereof and a male screw portion 12c provided on the tip end 12a side of the handle portion 12 so as to be brought into the tip end 12a side of the handle portion 12. It is provided by screwing. Therefore, by rotating the handle portion 12 with respect to the casing 16, the handle portion 12 can move in the extending direction of the handle portion 12 with respect to the casing 16. In particular, when the distal end side of the arm portion is in a closed state, the distal end 12a of the handle portion 12 protrudes from the casing 16 by screwing the handle portion 12 into the casing 16 by a predetermined amount, and the handle portion 12 is further screwed in. Then, as shown in FIG. 5B, the tip end portion of the rotating arm body 22 and the tip end 12a of the handle portion 12 come into contact with each other, and the rotation of the rotating arm body 22 can be restrained.

  Next, referring to FIG. 2, the interlocking mechanism that the operating body 26 and the rotating arm body 22 have, and the engagement structure that the interlocking mechanism has, that is, the lower portion (the concave portion 26d and the upper surface portion 26e) of the operating body 26 and the rotating arm. The operation of the engagement structure with the protrusion 22b of the body 22 will be described. FIG. 2A is a schematic view showing the interaction between the operating body 26 and the rotating arm body 22 in the open state on the distal end side of the arm portion of the ground wire attachment device 10. FIG. 5B is a schematic diagram showing the interaction between the operating body 26 and the rotating arm body 22 in the closed state on the distal end side of the arm portion of the ground wire attachment device 10. As shown in FIG. 5A, in the open state on the distal end side of the arm portion, the operating body 26 is in a position pushed up by being urged by the spring 28. The recess 26d and the protrusion 22b of the rotating arm body 22 are engaged with each other. By this engagement, the rotating arm body 22 urged so as to rotate in the closing direction by the spring 30 as the second urging means is maintained in a state against the urging force. From this state, when the operating body 26 is pushed down against the biasing means of the spring 28, the engagement between the recess 26d and the protrusion 22b is released in conjunction with the pushing down, as shown in FIG. The rotating arm body 22 is rotated by the urging force of the spring 30. The distal end side of the arm portion is closed as shown in FIG. 1B, and the upper surface portion 26e of the operation body 26 and the projection 22b come into contact with each other, and the operation body 26 resists the biasing force of the spring 28. Is maintained in the depressed position, so that the closed state is maintained. Further, the force for rotating the distal end portion of the rotating arm body 22 in the opening direction against the urging force of the spring 30 from the state shown in FIG. By applying a force for releasing the contact between the upper surface portion 26e and the protrusion 22b, the rotating arm body 22 rotates in a direction away from the fixed arm body 20, and at the same time, the protrusion 22b becomes a flat upper surface of the upper surface portion 26e. Move on the side. When the projection 22b moves to a position above the concave portion 26d, the contact with the upper surface portion 26e of the projection 22b is released, and the operating body 26 is moved upward by the urging force of the spring 28, as shown in FIG. The recess 26d and the protrusion 22b are engaged with each other. That is, in conjunction with the rotation of the rotating arm body 22, the operating body 26 moves upward and the concave portion 26d and the protrusion 22b engage with each other, and the open state on the distal end side of the arm portion is maintained. Therefore, the maintenance adjustment of the open / closed state of the distal end side of the arm portion is performed by contacting or releasing the upper surface portion 26e of the operating body 26 and the protrusion 22b of the rotating arm body 22 and rotating the recessed portion 26d of the operating body 26. This is done by engaging or disengaging the protrusion 22b of the arm body 22. That is, since the complicated adjustment for maintaining the open / closed state of the distal end side of the arm portion can be performed by the interaction of the two members of the rotating arm body 22 and the operating body 26, the open state of the distal end side of the arm portion is possible. And the structure of the maintenance adjustment mechanism in the closed state is simplified.

  Next, with reference to FIG. 1, attachment of the ground wire to the linear conductor A using the ground wire attachment device 10 will be described. First, as shown in FIG. 1 (A), in the stage before using the ground wire mounting tool 10, the rotation of the rotary arm body 22 is caused by the engagement of the concave portion 26d and the protrusion 22b. It is restrained against the urging force of the urging means, and the open state of the distal end side of the arm portion is maintained. In this state, the operator holds the base end 12b of the handle 12, moves the collar 26b of the operating body 26 in the direction of the arrow 100, brings the upper side 26a into contact with the linear conductor A, and continues to the collar 26 b is further moved in the direction of the arrow 100, and the operation of pushing down the flange portion 26 b against the holding portion 14 against the urging force of the spring 28 by the linear conductor A is performed. By this operation, the engagement between the recess 26d and the protrusion 22b is released, and the rotating arm body 22 is rotated by the urging force of the spring 30 (see FIG. 2B), as shown in FIG. Thus, the clamping part 14 clamps the linear conductor A. At this time, the upper surface portion 26e and the protrusion 22b are in contact with each other, and the operating body 26 is stopped at the pushed down position, so that the closed state is maintained. Therefore, the operator can maintain the holding state of the linear conductor A only by depressing the operating body 26 once. Further, for example, even when the operator loses balance on the armature of the steel tower due to a force majeure such as strong wind, and the pressing force of the operation body 26 is reduced or becomes zero, the linear conductor A and the sandwiching portion 14 are The risk of separation is reduced.

  In the sandwiched state, the linear conductor A needs to be securely contacted and sandwiched by the concave surfaces 20a and 22a of both arms in order to ensure conduction. For this purpose, for example, the rotation width of the rotating arm body 22 is adjusted by increasing the reciprocating length of the operating body 26, or linear shapes having various diameters on the concave surface 20a and / or the concave surface 22a of the arm portion. By providing a shape (for example, a corrugated shape) corresponding to the conductor A, it is possible to ensure contact between the linear conductors A and the concave surfaces 20a and 22a of both arms.

  When the operator wants to release the clamping state, the operator only needs to hold the proximal end 12b of the handle 12 and pull it in the direction opposite to the arrow 100. As a result, the distal end portion of the rotating arm body 22 in contact with the linear conductor A rotates in the opening direction against the urging force of the spring 30. Then, as shown in FIG. 1A, the linear conductor A is separated from the distal end side of the arm portion in the open state. At the same time, the concave portion 26d of the operating body 26 and the protrusion 22b of the rotating arm body 22 are engaged, and the distal end side of the arm portion is maintained in the open state. Therefore, the clamping part 14 is in a state where it is ready to clamp the next linear conductor A.

  Furthermore, when it is desired to maintain the clamping state firmly, the operator holds the linear conductor A by holding the proximal end 12b of the handle 12 in a state in which the closed state of the distal end side of the arm part is maintained. The handle part 12 is rotated in a direction in which the handle part 12 is screwed into the casing 16 having the holding part 14. As a result, the tip 12a of the handle 12 protrudes outward from the casing 16 along with this rotation, and the handle 12 is further rotated in the same direction, so that the tip 12a rotates as shown in FIG. It contacts the tip of the moving arm body 22. Thereby, since the rotation of the rotating arm body 22 is restrained, the holding state of the linear conductor A by the holding portion 14 is firmly maintained. Therefore, even when the operator accidentally releases his / her hand from the handle 12 or when he / she accidentally pulls the handle 12 in the direction in which he / she pulls the handle 12 in his / her hand, the holding state of the linear conductor A by the holding portion 14 is maintained. Safe and secure.

(Second Embodiment)
As in the first embodiment, the second embodiment of the present invention is attached to the ground wire for attaching the ground wire to the non-insulated linear conductor A on the armature of the steel tower that supports the linear conductor A. An instrument will be described as an example with reference to FIG. The present embodiment differs from the first embodiment in the shapes of the operating body and the rotating arm body, and therefore the movement of the interlocking structure that they have is different. Further, there is no engagement structure between the lower part of the operating body and the lower part of the rotation shaft in the arm part. Therefore, the shape of the operating body and the rotating arm body and the interlocking mechanism of the operating body and the rotating arm body will be mainly described. In the figure, elements similar to those in the embodiment shown in FIGS. 1 and 2 described above are denoted by the same reference numerals and description thereof is omitted.

  FIG. 3A is a schematic diagram for explaining a ground wire attachment device 40 according to the second embodiment of the present invention, and FIG. 3B is also a holding portion 14 of the ground wire attachment device 40. FIG. 3 is a view showing a state in which a linear conductor A is sandwiched. As shown in the figure, the rotating arm body 42 has a distal end portion formed in an arc shape so as to have a concave surface 42a facing the concave surface 20a of the fixed arm body 20, and a bent portion located near the base end thereof is a hinge. 24 is pivotally attached to the fixed arm body 20. The operation body 44 is formed in a substantially T shape, extends in a direction orthogonal to the extending direction of the handle portion 12, and has the widest width between the concave surface 20a and the concave surface 42a in the open state on the distal end side of the arm portion. It has a rod-shaped flange 44a having a length that is substantially equal. The surface of the flange portion 44a on the arrow 200 direction side is the upper side portion 44b of the operating body 44. Furthermore, it has the rod-shaped part 44c extended linearly in the extending | stretching direction of the handle | pattern part 12 from the approximate center part of the extending direction of this collar part 44a to the inside of the casing 16. FIG. The operating body 44 is moved in the direction of the arrow 200, that is, from the base end 12b of the handle portion 12 by a spring 28 (first biasing means) sandwiched between the tip end 44d of the rod-like portion 44c and the bottom surface 16a of the casing 16. The handle 12 is urged in the direction in which the handle 12 extends toward the tip 12a.

  Further, the operation body 44 is restricted in movement by a guide (not shown) provided in the casing 16 and can reciprocate only in the extending direction of the handle portion 12. The distal end 44 d of the operating body 44 is connected to the distal end 46 a of the rod-shaped link 46, and the base end 46 b of the link 46 is connected to the base end 42 b of the rotating arm body 42. That is, the rotating arm body 42 and the operating body 44 have an interlocking structure that interlocks via the link 46. In the present embodiment, the spring 30 as the second urging means is not provided, and the distal end portion of the rotating arm body 42 is urged to rotate toward the fixed arm body 20 side. No.

  Next, with reference to FIG. 3 (A) and FIG. 3 (B), the attachment of the ground wire to the linear conductor A using this ground wire attachment tool 40 will be described. In the present embodiment, the operating body 44 is normally in a position pushed up by being biased by the spring 28, and the base end 42b of the rotating arm body 42 is pushed upward (in the direction of arrow 200 in the figure) by the link 46. ing. Therefore, the distal end portion of the rotating arm body 42 located on the opposite side of the base end 42b from the shaft rotates in a direction away from the concave surface 20a of the fixed arm body 20. That is, the distal end side of the arm portion is in an open state. The operator holds the base end 12b of the handle portion 12, moves the collar portion 44a of the operating body 44 in the direction of the arrow 200, brings the upper side portion 44b into contact with the linear conductor A, and further moves the collar portion 44a to the arrow. By moving in the 200 direction, the flange portion 44 a is pushed down against the nip portion 14 against the urging force of the spring 28. By this depression, the link 46 is interlocked and pulled downward, the base end 42b side of the rotating arm body 42 connected to the base end 46b of the link 46 is lowered, and the base end 42b is positioned on the opposite side across the shaft. The distal end portion of the rotating arm body 42 rotates in a direction approaching the concave surface 20a of the fixed arm body 20, and the holding portion 14 holds the overhead electric wire A as shown in FIG.

  When it is desired to release the sandwiched state, the operator performs an operation of pulling back the handle portion 12 in the direction opposite to the arrow 200 so that the collar portion 44a is moved in the direction opposite to the arrow 200 in FIG. By this operation, the flange portion 44a is pushed up with respect to the holding portion 14 by the biasing force of the spring 28, and the distal end portion of the rotating arm body 42 is fixed to the fixed arm body via the link 46 in conjunction with the pushing up of the flange portion 44a. By rotating in a direction away from the 20 concave surface 20a, the sandwiched state is quickly released.

  Therefore, the operator simply presses the collar portion 44a against the linear conductor A, and pushes down the operating body 44 against the clamping portion 14 by the linear conductor A, so that the linear conductor A is clamped. 14, and only the release of the operation body 44 by the linear conductor A is released, the distal end side of the arm portion is opened again, so that the sandwiching section 14 is removed from the linear conductor A. The pinching portion 14 can be separated from the linear conductor A by simply pulling back linearly in the extending direction.

  Conversely, when the operator wants to maintain the clamping state, the operator screws the handle 12 into the casing 16 having the clamping part 14 that clamps the overhead electric wire A while maintaining the pressing of the flange part 44a. The operation to rotate is performed. Along with this rotation, the tip 12a of the handle 12 moves in a protruding direction, and comes into contact with the tip of the rotating arm body 42 as shown in FIG. Therefore, the holding state of the overhead electric wire A by the holding portion 14 can be maintained.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention. For example, it is possible to configure the two arm portions of the sandwiching portion with two rotating arm bodies pivotally attached to the casing 16. According to this, the opening degree in the open state on the distal end side of the arm portion can be made larger.

  In the entire specification, the overhead electric wire is the linear conductor A, but the arc horn or the like provided on the insulator is also included in the linear conductor A.

DESCRIPTION OF SYMBOLS 10, 40 Ground wire attachment tool 12 Handle part 14 Clamping part 16 Casing 18 Ground wire 20 Fixed arm body 22, 42 Rotating arm body 22b Protrusion 26, 44 Operation body 26a, 44b Upper side part 26d Recess 26e Upper surface part 28 Energizing means 30 Second energizing means A Linear conductor

Claims (4)

A rod-shaped handle portion that is electrically insulated and protected; a holding portion that is provided on a tip end side of the handle portion and holds the linear conductor; and a ground wire that is electrically connected to the holding portion. In the ground wire mounting device,
The sandwiching portion has two arms that are pivotally attached to the rotation shaft and can be opened and closed at the tip end and can sandwich the linear conductor in a closed state.
An operating body provided between the two arms and provided so that the upper side reciprocates in the extending direction of the handle in a region on the tip side of the arm.
First biasing means for biasing the operating body upward,
The operating body and the arm are
A ground wire attachment, characterized in that it has an interlocking structure that interlocks with the movement of the operating body being pushed down against the urging force of the first urging means, and the arm portion rotates to be in the closed state. Instruments. The interlocking structure is
The lower part of the operating body and the lower part of the rotating shaft in the arm part have a structure that engages with each other,
The engagement structure is
When the operating body is moved downward by a predetermined amount, the lower part of the operating body is engaged with the lower portion of the pivot shaft of the arm portion, so that the operating body is restrained at the lower moving position and is in the closed state. Maintain
In the closed state, a force is applied to the distal end side of the arm portion to open the distal end side of the arm portion, thereby releasing the engagement and allowing the operating body to move upward. The grounding wire attachment device according to claim 1, wherein One of the arms is a non-rotating fixed arm,
The other of the arm portions is a rotating arm body that can rotate about the rotating shaft,
The rotating arm body is biased by the second biasing means so that the distal end side of the arm portion is in a closed state,
The shape of the lower part of the operating body is
It protrudes in a direction intersecting with the extending direction of the handle and has a flat upper surface portion on the tip side, and the flat upper surface portion comes into contact with the lower portion of the rotating shaft of the rotating arm body. A projecting part responsible for stopping the operating body at the lower position,
It is formed on the base end side of the projecting portion, and resists the urging force of the second urging means by engaging with the lower part of the rotating shaft of the rotating arm body at the upward movement position of the operating body. And a recess for maintaining the distal end side of the arm portion in an open state. Having a casing to which the fixed arm and the operating body are respectively attached;
The handle is screwed and attached to the casing in the extending direction of the handle, and the tip of the handle penetrates the casing and protrudes outward from the casing by a screwing operation.
The ground wire attachment device according to claim 3, wherein a tip of the handle portion is in contact with the rotating arm body in the closed state in the protruding state and maintains the closed state.

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