JP2020036458A - Tool for attaching/detaching high voltage cover - Google Patents

Abstract

To enhance workability during attachment/detachment of a high voltage cover.SOLUTION: A tool 1 for attachment/detachment is provided with: a common operation rod 2; and a tip tool 3 attachably/detachably fitted to the common operation rod 2. The tip tool 3 is provided with: a main shaft 12 extended from an end portion of the common operation rod 2; a branch shaft 13 laterally protruded from a proper portion of the main shaft 12; and a spindle portion 14 provided at a tip of the main shaft 12 to be used as a rotation shaft during operation. The tool 1 for attachment/detachment is used during opening/closing of a lock part when a high voltage cover is attached/detached. The branch shaft 13 is inserted into an insertion hole during the opening/closing of the lock part, and a hooking hole is engaged with/disengaged from a hooking protrusion to perform attachment/detachment operation. Then, the spindle portion 14 comes into contact with a proper portion of the high voltage cover to be used as a rotation shaft.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tool for attaching and detaching a high-pressure cover.

As a high-pressure cover that covers a protection target to which a high voltage is applied, for example, a retention clamp cover that covers a retention clamp is known.
The retention clamp is a hardware attached to the end of the overhead wire (conductor) that distributes a high voltage, and a high pressure is applied to the retention clamp through the overhead wire. For this reason, the retaining clamp is installed in a state covered by a retaining clamp cover made of an insulating resin material.
The retaining clamp is fixed to a utility pole via a tension insulator. Since the tension insulator deteriorates with use, it is replaced as the deterioration progresses. When replacing the tension insulator, it is necessary to attach and detach the retaining clamp cover.
The retaining clamp cover has two openable and closable pieces that can be opened and closed, and a lock portion that maintains a closed state when the retaining clamp is closed with the retaining clamp interposed between the two pieces. The lock portion has a lock piece provided on one of the open / close pieces and a lock piece provided on the other open / close piece. By locking the lock pieces, the closed state of the open / close pieces is maintained. Further, by releasing the lock by the lock piece, the retaining clamp cover is made removable from the overhead wire.
The attachment and detachment of the retaining clamp cover is performed by, for example, an indirect hot-line method in which a tip tool is attached to the tip of the common operation rod and the attaching and detaching operation is performed from below the retaining clamp cover.

The following are known as advanced tools used for the indirect hot-line construction method.
Patent Literature 1 discloses a tip tool in which a middle portion of a round bar extending from the tip of a common operation rod is bent at a substantially right angle to make the tip flat. This tip tool is used when removing the protective tube attached to the overhead wire. The tip of the round bar has a flat shape having a lateral surface orthogonal to the axial direction of the common operation rod, and facilitates insertion of the round bar into the gap between the lower part of the overhead wire and the lower part of the protection tube.
Patent Literature 2 discloses a tip tool in which a round bar is bent in a "-" shape in the middle and a magnetic material such as a magnet is attached to the tip of the round bar. The tip tool is used to attach a metal movable member included in the burrower when attaching the burrower to a utility pole. In this tip tool, the tip of the magnetic material is made a flat suction surface to improve the suction force generated between the magnetic material and the movable member. Further, the operability is improved by appropriately setting the bending angle of the round bar and the inclination angle of the suction surface.
Patent Literature 3 discloses a tip tool having a holding aid that is detachably attached to the tip of a common operation rod and tools that are held by the holding aid. With this tip tool, a flathead screwdriver can be used as one of the tools.

JP 2017-212772 A JP 2014-099965 A JP 2011-135625 A

The tip tool disclosed in each patent document is not manufactured for the purpose of attaching and detaching the high-pressure cover. Therefore, when these tip tools are used for attaching and detaching the high-pressure cover, it may take time to lock and release the lock portion, or the lock portion may be damaged.
The present invention has been made in view of such circumstances, and an object of the present invention is to improve workability when attaching and detaching a high-pressure cover.

  In order to solve the above problems, the present invention is a tool for attaching and detaching a high-pressure cover, wherein the high-pressure cover has two openable and closable pieces and an object to be protected interposed between the two pieces. A lock portion that maintains a closed state when closed in a state, wherein the lock portion is provided on one of the open / close pieces and the first lock piece is provided on the other open / close piece. And a second lock piece having a tool insertion hole, and a tool insertion hole, wherein the attaching / detaching tool includes an operating rod, a main shaft extending from an end of the operating rod, A branch shaft protruding laterally from an appropriate position of the main shaft, and a support shaft portion provided at the tip of the main shaft and serving as a rotation shaft at the time of operation, wherein the branch shaft is inserted into the tool insertion hole and When the fitting lock hole is attached to and detached from the first lock piece, the support shaft is attached to the high-pressure cover. Contact with, characterized in that the said times shaft.

  ADVANTAGE OF THE INVENTION According to this invention, the workability | operativity at the time of attachment / detachment of a high-pressure cover can be improved.

FIG. 2A is a front view of a tip tool according to an embodiment of the present invention, and FIG. 2B is a diagram illustrating a detachable tool in which the tip tool is attached to a tip of a common operation rod. (A) is a front view of a holding clamp cover, (b) is a bottom view of the holding clamp cover, and (c) is a diagram showing a holding clamp in the holding clamp cover. It is a figure which shows the use state of a retention clamp cover. (A) is a figure which shows the lock part of a lock state, (b) is a figure which shows the tongue piece part in the middle of the passing of the locking hole through the head of a locking projection, (c) is a lock. It is a figure showing a lock part where a state was released. (A) is a figure which shows the tongue piece part when the branch shaft of the attachment / detachment tool is inserted in the insertion hole, (b) is a figure which shows the tongue piece part when the attachment / detachment tool is rotated, (C) is a figure which shows the tongue piece part when the front-end | tip of a latching projection is fitted in a latching hole, (d) is a figure which shows the tongue piece part latched on the latching projection. (A) is a figure which shows the tongue piece part when the branch shaft of the tool for attachment / detachment is inserted in an insertion hole, (b) is a tongue when the front-end | tip is curved by the branch shaft toward the head side of a latching projection. It is a figure which shows a piece part, (c) is a figure which shows the tongue piece part when a latching hole has passed the head of a latching projection, and (d) is when unlocking with a latching projection is released. It is a figure which shows the tongue piece part. (A) is a figure which shows the tongue piece part when the branch shaft of the attachment / detachment tool is inserted in an insertion hole, (b) abuts the front-end | tip of the branch shaft inserted in the insertion hole with the head of a latching projection. It is a figure which shows the tongue piece at the time of making it possible, (c) is a figure which shows the tongue piece at the time of fitting a hook hole in the head of a latching projection, (d) is a figure which shows a latching projection. It is a figure which shows the tongue piece part which latched. (A) is a right side view of the retaining clamp cover, (b) is a diagram showing a tongue piece just before inserting the tip of the branch shaft into the insertion hole, (c) is inserting the branch shaft into the insertion hole, It is a figure which shows the tongue piece part when a branch shaft is pulled down. (A) is a figure which shows the tongue piece part when a spindle part is inserted in an insertion hole from below, (b) is a figure which shows the tongue piece part hooked on the latching projection. (A) is a top view of another holding clamp cover, and (b) is a front view of the holding clamp cover. (A) is a figure which shows the lock part with which another retention clamp cover is provided, (b) is a figure which shows the lock part of a released state. (A) is a side view of another lock part, (b) is a plan view of another lock part, and (c) is a view showing a state where the locked state is released in another lock part. It is a front view of a tip tool concerning a 2nd embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are not merely intended to limit the scope of the present invention but are merely illustrative examples unless otherwise specified. .
<About the outline of the attachment / detachment tool 1>
FIG. 1 is a view showing the attachment / detachment tool 1, FIG. 2 is a view showing the retention clamp cover 20, FIG. 3 is a view showing a use state of the retention clamp cover 20, and FIG. It is a figure showing lock part 27 provided.
The attachment / detachment tool 1 shown in FIG. 1 is a means used when the lock portion 27 of the anchoring clamp cover 20 (high-pressure cover) shown in FIGS. 2A and 2B is locked or unlocked. As shown in FIGS. 2C and 3, the retaining clamp cover 20 covers the retaining clamp 32 (the object to be protected) attached to the overhead wire 31. The retaining clamp 32 is fixed to an arm 33 provided on a utility pole via a tension insulator 34.
As shown in FIGS. 2A to 2C, the clamp clamp cover 20 includes a first cover piece 21 (one open / close piece) and a second cover piece 22 (the other open / close piece) that can be opened and closed. And a lock portion 27 that maintains the closed state when the clamp 32 is closed with the clamp 32 interposed between the two cover pieces 21 and 22. As shown in FIGS. 2A, 2 </ b> B, and 4, the lock portion 27 is provided on a hooking projection 21 d (first lock piece) provided on the first cover piece 21 and on the second cover piece 22. And a tongue piece 22d (a second lock piece) provided with a locking hole 22f (fitting locking hole) for fitting and locking the locking projection 21d, and a insertion hole 22g (tool insertion hole). are doing.

When replacing the tension insulator 34, it is necessary to attach and detach the retaining clamp cover 20, and the attaching and detaching work of the cover 20 is performed by an indirect hot-line method using the attaching and detaching tool 1. Note that the retention clamp 32 is not attached or detached when the tension insulator 34 is replaced, and is kept attached to the overhead wire 31.
As shown in FIGS. 1A and 1B, the attachment / detachment tool 1 includes a common operation rod 2 operated by an operator and a tip tool 3 detachably attached to a tip of the common operation rod 2. Have. The tip tool 3 includes a main shaft 12 extending from an end of the common operation rod 2, and a branch shaft protruding laterally from an appropriate position of the main shaft 12 (in this example, a front end of the main shaft 12 retracted by a predetermined length from a front end of the support shaft portion 14). 13 and a support shaft portion 14 provided at the tip of the main shaft 12 and serving as a rotation shaft during operation.

FIG. 5 is a diagram illustrating an example of a locking operation of the lock unit 27 using the attachment / detachment tool 1, and FIG. 6 is a diagram illustrating an example of an unlocking operation of the lock unit 27 using the attachment / detachment tool 1.
As shown in FIGS. 5A to 5D, when the tongue piece 22d is hooked on the hooking projection 21d to lock the lock portion 27, the tip end 13b of the branch shaft is inserted into the tongue piece 22d. The support shaft portion 14 is inserted into the hole 22g, and is brought into contact with an appropriate position (a hook projection 21d in this example) of the retaining clamp cover 20. By rotating the attachment / detachment tool 1 with the support shaft portion 14 in contact with an appropriate position of the retaining clamp cover 20 as a rotation axis, the tongue piece portion 22d rises, and the head of the hook projection 21d is inserted into the hook hole 22f. The part 21e is fitted. When the engaging hole 22f passes through the head 21e, the tongue piece 22d is engaged with the engaging protrusion 21d, and the lock portion 27 is locked.
As shown in FIGS. 6A to 6D, when the locking state of the lock portion 27 is released by releasing the locking of the tongue piece 22d and the locking projection 21d, the tip of the branch shaft 13b is moved to the tongue piece. The insertion / removal tool 1 is moved so that the tip of the tongue piece 22d bends toward the head 21e of the engaging projection 21d while being inserted into the insertion hole 22g of the 22d. By moving the attachment / detachment tool 1 until the hook hole 22f of the tongue piece 22d passes through the head 21e of the hook projection 21d, the hook between the tongue piece 22d and the hook projection 21d is released.

In the attachment / detachment tool 1 of the present embodiment, the branch shaft 13 is inserted into the insertion hole 22g of the tongue piece 22d when the lock portion 27 is opened and closed, and the tongue piece 22d is moved while being hooked on the branch shaft 13. Since there is a degree of freedom in the direction in which the branch shaft 13 is inserted, the branch shaft 13 can be easily inserted while avoiding obstacles such as the tension insulator 34. In addition, even after the branch shaft 13 is inserted into the insertion hole 22g, the direction in which the attachment / detachment tool 1 is moved can be selected and can be moved within the range of the length of the branch shaft 13, thereby improving workability when attaching / detaching the cover. Can be done.
Further, since the pivoting operation can be performed with the support shaft portion 14 abutting on the appropriate position of the retaining clamp cover 20 as a rotation axis, the attachment / detachment tool 1 can be stably rotated, thereby improving workability. Can be. In addition, since the tongue piece 22d can slide on the branch shaft 13, excessive deformation of the tongue piece 22d is suppressed, and breakage can be suppressed.

Hereinafter, the attachment / detachment tool 1 will be described in detail.
<About the clamp clamp cover 20>
Prior to the description of the attachment / detachment tool 1, the retaining clamp cover 20 will be described.
As shown in FIGS. 2A and 2B, the retaining clamp cover 20 includes a first cover piece 21, a second cover piece 22, and a hinge portion 23, and has electrical insulation. It is produced by molding a resin material (for example, polyethylene). In the retaining clamp cover 20, the upper end of the first cover piece 21 and the upper end of the second cover piece 22 are connected to each other via a hinge 23 so as to be freely opened and closed. Since the hinge portion 23 is elastically deformed, the first cover piece 21 and the second cover piece 22 are opened by the restoring force of the hinge portion 23 when no external force is applied. Further, the first cover piece 21 and the second cover piece 22 can be closed by applying an external force.

As shown in FIG. 2A, the first cover piece 21 includes a first accommodating portion 21 a having a concave cross-section in which the retaining clamp 32 can be arranged, and a longitudinal direction of the first accommodating portion 21 a (the hinge portion 23). A first guide 21b having a small diameter which is arranged at both ends and forms an opening through which the overhead wire 31 (see FIG. 3) is inserted while guiding the overhead wire 31 (see FIG. 3); Is also arranged below, and has a small-diameter first arranging portion 21c forming an opening in which a rear shaft 34a (see FIG. 3) of the tension insulator 34 is arranged, and a lower end edge of the first accommodating portion 21a and the first guide 21b. And a locking projection 21d protruding from each other.
The first accommodating portion 21a forms a box-shaped body (the clamp accommodating portion 24 in FIG. 2C) for accommodating the retaining clamp 32 by being combined with a second accommodating portion 22a described later when the cover pieces 21 and 22 are closed. I do. The first guide 21b forms a tubular body (an overhead wire guide portion 25 in FIG. 2 (c)) that guides the overhead wire 31 by being combined with a second guide 22b to be described later when the cover pieces 21 and 22 are closed. The first arranging portion 21c is a cylindrical body (the insulator shown in FIG. 2C) on which the rear shaft 34a of the tension insulator 34 is arranged by being fitted with a second arranging portion 22c to be described later when the cover pieces 21 and 22 are closed. The arrangement unit 26) is configured.
A total of four locking projections 21d are provided, two provided at the lower end edge of the first accommodation portion 21a with an interval and two provided one at each first guide portion 21b. I have.
As shown in FIGS. 4B and 4C, the hooking projection 21d has a head 21e whose surface is curved in a convex shape, and a support 21f that supports the head 21e. In the present embodiment, the head 21e has a shape obtained by dividing an ellipsoid into two orthogonal planes, and the support 21f is a leg having an H-shaped cross section.

As shown in FIGS. 2A and 2B, the second cover piece 22 has a concave cross-sectional shape in which the retaining clamp 32 can be arranged inside, and when the respective cover pieces 21 and 22 are closed, the first housing portion 21 a A second accommodating portion 22a to be fitted, a second guide 22b arranged at both ends in the longitudinal direction of the second accommodating portion 22a, and being fitted to the first guide 21b when the cover pieces 21 and 22 are closed, and a left side of the second accommodating portion 22a. A second arrangement portion 22c that is arranged below the second guide 22b and is aligned with the first arrangement portion 21c when each of the cover pieces 21 and 22 is closed, a second accommodation portion 22a, and a second guide 22b. And a tongue piece 22d projecting from the lower edge.
Each tongue piece 22d is provided at a position corresponding to each hooking projection 21d. That is, each tongue piece 22d is provided with a total of four, two provided at the lower end edge of the second storage portion 22a at an interval and two provided at each second guide 22b. ing.

As shown in FIGS. 2A to 2C, in a state where the first cover piece 21 and the second cover piece 22 are closed, the first accommodating portion 21a and the second accommodating portion 22a accommodate the retaining clamp 32. The first guide 21b and the second guide 22b form a possible clamp accommodating portion 24, and the first guide portion 21b and the second guide 22b form an overhead wire guide portion 25 capable of guiding the overhead wire 31. The insulator arranging portion 26 in which the rear shaft 34a of the tension insulator 34 can be arranged is formed.
As shown in FIGS. 2C and 3, the holding clamp 32 is fixed to the arm 33 (an electric pole) via a tension insulator 34, and the holding clamp cover 20 connects the holding clamp 32 to the first holding member 32. The two cover pieces 21 and 22 are closed while being interposed between the cover piece 21 and the second cover piece 22.
A set of a hook projection 21d of the first cover piece 21 and a tongue piece 22d of the second cover piece 22 is a lock that maintains a closed state when the first cover piece 21 and the second cover piece 22 are closed. The part 27 is constituted.

  As shown in FIGS. 2B and 4C, the tongue piece portion 22d of the second cover piece 22 has a thin plate shape whose tip is curved in an arc shape and has flexibility. The base end of the tongue piece 22d is a hinge 22e that is easily bent and curved. When no external force is applied, the tongue piece 22d is separated from the engaging projection 21d by the restoring force of the hinge 22e. At the center of the tongue piece 22d, a semicircular locking hole 22f is provided. The hook hole 22f is an opening through which the head 21e of the hook projection 21d passes. Therefore, the hook hole 22f is large enough to allow the head 21e of the hook projection 21d to penetrate. A circular insertion hole 22g is provided on the tip side of the tongue piece 22d with respect to the locking hole 22f. The branch shaft 13 and the support shaft 14 of the tip tool 3 shown in FIG. 1A are inserted into the insertion holes 22g. Therefore, the inner diameter of the insertion hole 22g is larger than the diameter of the branch shaft 13 or the support shaft portion 14.

As shown in FIG. 4A, in the locked state of the lock portion 27, the head 21e of the hooking projection 21d is fitted into the hooking hole 22f of the tongue piece 22d. When no external force is applied, the head 21e of the hook projection 21d is hooked on the tongue piece 22d by the restoring force of the hinge 22e, and the closed state between the first cover piece 21 and the second cover piece 22 is set. Maintain When the tip of the tongue piece 22d is moved from the locked state of FIG. 4A to the head 21e side of the locking projection 21d, the locking hole of the tongue piece 22d as shown in FIG. 4B. 22f is located around the head 21e of the hooking projection 21d. As shown in FIG. 4C, when the tip of the tongue piece 22d is further moved and the locking hole 22f passes through the head 21e, the locked state by the lock portion 27 is released. The first cover piece 21 and the second cover piece 22 can be opened by releasing the locked state of all the four lock portions 27.

<About tool 1 for attachment and detachment>
As shown in FIGS. 1A and 1B, a detachable tool 1 is detachably attached to a common operation rod 2 operated by an operator and a mounting portion 2 a provided at a tip of the common operation rod 2. And a tip tool 3 to be used.
The tip tool 3 is attached to and detached from the mounting portion 2a of the common operation rod 2 by a so-called twist lock mechanism and is relatively non-rotatably mounted. A main shaft 12 extending along the axial direction of the main shaft 12, a branch shaft 13 protruding laterally from an appropriate position of the main shaft 12, and a support shaft portion 14 provided at the tip of the main shaft 12 and serving as a rotation shaft during operation. ing.
The main shaft 12 is made of a round bar steel material having a diameter of 6 mm and a length L1 of 92 mm. The support shaft portion 14 is provided continuously from the tip of the main shaft 12, and has a length L2 of 8 mm. Accordingly, the total length (L1 + L2) of the main shaft 12 and the support shaft portion 14 is 100 mm. The base end diameter of the support shaft portion 14 is 6 mm as in the main shaft 12. The support shaft portion 14 is formed in a flat shape that is thinner toward the distal end, like a flathead screwdriver. Specifically, the distal end surface of the support shaft portion 14 is a surface extending in a direction parallel to the axial direction of the branch shaft 13.

In the present embodiment, when the tip tool 3 is mounted on the common operation rod 2, the main shaft 12 and the support shaft portion 14 are provided at concentric positions where the common operation rod 2 and the central axis CA are common. Thus, when the common operation rod 2 is rotated about the axis, the main shaft 12 and the support shaft 14 also rotate about the axis, so that the main shaft 12 and the support shaft 14 are shaken (eccentric). Inconvenience can be suppressed.
The branch shaft 13 is made of a round bar having a diameter of 5 mm and a length L3 of 50 mm. The branch shaft 13 is provided in a direction in which an axis of the main shaft 12 and an axis of the branch shaft 13 intersect at an angle θ1 with a boundary between the main shaft 12 and the support shaft portion 14 as a base point. In the present embodiment, the intersection angle θ1 is 108 °. The proximal end of the branch shaft 13 is joined to the main shaft 12 by welding.
The distal end (branch distal end) 13b of the branch shaft 13 also has a flat shape like a flathead screwdriver, like the distal end of the support shaft portion 14. The distal end surface of the branch shaft distal end portion 13b is a vertical surface parallel to the axial direction of the common operation rod 2. The branch shaft tip 13 b is bent with respect to the base of the branch shaft 13. In the present embodiment, the length L4 of the branch shaft tip 13b is 10 mm, and the bending angle θ2 is 18 °. Thus, the axis of the branch shaft tip 13b and the main shaft 12 intersect at right angles.

It should be noted that the above numerical values are merely examples, and the present invention is not limited to these numerical values.
For example, a round bar steel material having a diameter of 5 mm to 9 mm can be used for the main shaft 12 and the support shaft portion 14, and a round bar steel material having a diameter of 4 mm to 6 mm can be used for the branch shaft 13. Further, for the main shaft 12, the support shaft portion 14, and the branch shaft 13, a square steel material may be used instead of the round bar steel material.
The total length of the main shaft 12 and the support shaft 14 may be in the range of 80 mm to 150 mm, and the length of the support shaft 14 may be in the range of 6 mm to 12 mm. The length of the branch shaft 13 may be in a range of 40 mm to 75 mm, and the length of the branch shaft tip portion 13b may be in a range of 8 mm to 15 mm.
The intersection angle θ1 between the main shaft 12 and the branch shaft 13 may be in a range of 75 ° to 115 ° (= 90 ± 25 °), and the bending angle θ2 of the branch shaft 13 may be in a range of ± 25 °.
The intersection angle θ1 is preferably set in a range of 105 ° to 115 ° (= 90 ° + 15 ° to 25 °) in consideration of approaching the lock portion 27 located above the tension insulator 34. When the intersection angle θ1 is set in this range, when opening and closing the retaining clamp cover 20 from below the cover, it becomes easy to insert the tip of the branch shaft 13 into the insertion hole 22g of the tongue piece 22d while avoiding the tension insulator 34.

<Regarding opening and closing of the lock unit 27>
Next, the opening and closing of the lock portion 27 of the retaining clamp cover 20 will be described. First, an operation on the lock portion 27A located above the tension insulator 34 will be described. Since the tension insulator 34 interferes with the lock portion 27A, it is difficult to operate the lock portion 27A with the attachment / detachment tool 1.
First, an operation up to locking the lock portion 27A in the unlocked state will be described with reference to FIG.

In the lock portion 27A shown in FIG. 5A, the tongue piece 22d is separated from the hooking projection 21d. From this state, the tip 13b of the branch shaft of the attachment / detachment tool 1 is inserted into the insertion hole 22g from the hooking projection 21d side (the inner surface side of the tongue piece 22d). When the tip end portion 13b of the branch shaft inserted into the insertion hole 22g reaches the opposite surface side (outer surface side of the tongue piece portion 22d) of the tongue piece portion 22d, the tip end portion of the tongue piece portion 22d is supported by the branch shaft 13, The tongue piece 22d can be moved in accordance with the movement of the branch shaft 13 (tool 1).
As shown in FIG. 5B, the spindle 14 is brought into contact with the head 21e of the hooking projection 21d from the state of FIG. 5A, and the branch shaft 13 is rotated clockwise about the spindle 14 as a fulcrum. The tongue piece 22d rises up and the hook hole 22f is located near the head 21e of the hook projection 21d.
As shown in FIG. 5C, when the tip of the tongue piece 22d is moved toward the hooking projection 21d by operating the attachment / detachment tool 1 from the state of FIG. 5B, the tongue piece 22d is further moved. Then, the head 21e of the hooking projection 21d is fitted into the hooking hole 22f.
As shown in FIG. 5D, when the tip of the tongue piece 22d is further moved to the hooking projection 21d side by operating the attachment / detachment tool 1 from the state of FIG. 5C, the hooking hole 22f is formed. It passes through the head 21e of the hanging projection 21d. When the branch shaft 13 is pulled out from the tongue piece 22d in this state, the restoring force of the hinge 22e positions the tongue piece 22d at the boundary between the head 21e of the hooking projection 21d and the support 21f, and the lock 27A. Is maintained in the locked state.

Next, an operation until the lock of the lock portion 27A in the locked state is released will be described with reference to FIG.
As shown in FIG. 6A, in the lock portion 27A in the locked state, the tongue piece 22d is hooked on the hook projection 21d. From this hooked state, the tip 13b of the branch shaft of the tool 1 is inserted into the insertion hole 22g from the inner surface of the tongue piece 22d. When the tip 13b of the branch shaft inserted into the insertion hole 22g reaches the outer surface side of the tongue piece 22d, the tip of the tongue piece 22d is supported by the branch shaft 13, and the tongue is moved with the movement of the tool 1 for attachment and detachment. The piece 22d can be moved.
As shown in FIG. 6 (b), from the state where the branch shaft tip 13b reaches the head 21e of the hooking projection 21d, the branch shaft tip 13b and the head 21e are kept in contact with each other. When the shaft 13 is rotated counterclockwise like a lever, the tip of the tongue piece 22d bends toward the head 21e.
As shown in FIG. 6C, when the branch shaft 13 is further rotated from the state of FIG. 6B, the locking holes 22f pass through the heads 21e of the locking projections 21d, and the locking of the locking portion 27A is performed. The state is solved.
As shown in FIG. 6D, since the hinge portion 22e of the tongue piece 22d has a restoring force, the tongue piece 22d is pulled out of the insertion hole 22g, so that the tongue piece 22d becomes the hooking projection 21d. Keep away from

Next, based on FIG. 7, another operation until the lock portion 27A in the unlocked state is locked will be described. FIG. 7 is a diagram illustrating another example of the locking operation of the locking portion 27A using the attachment / detachment tool 1.
First, as shown in FIG. 7A, the tip 13b of the branch shaft of the attaching / detaching tool 1 is inserted into the insertion hole 22g from the outer surface of the tongue piece 22d.
Next, as shown in FIG. 7 (b), the branch shaft 13 is inserted deeply into the insertion hole 22g from the state of FIG. 7 (a), and the branch shaft tip 13b is brought into contact with the head 21e of the hooking projection 21d. . When the branch shaft 13 is inserted, the tip of the tongue piece 22d can slide on the branch shaft 13, so that inconvenience such as excessive bending of the tongue piece 22d with the insertion of the branch shaft 13 can be suppressed. .
As shown in FIG. 7C, when the branch shaft 13 is rotated clockwise like a lever with the branch shaft tip 13b as a fulcrum from the state of FIG. 7B, the tongue piece 22d rises. The latch hole 22f is located near the head 21e of the latch protrusion 21d.
As shown in FIG. 7D, when the branch shaft 13 is further rotated clockwise from the state shown in FIG. 7C, the hook hole 22f passes through the head 21e of the hook projection 21d. When the branch shaft 13 is pulled out from the tongue piece 22d in this state, the restoring force of the hinge 22e positions the tongue piece 22d at the boundary between the head 21e of the hooking projection 21d and the support 21f, and the lock 27A. Is maintained in the locked state.

In the attachment / detachment tool 1 of the present embodiment, the branch shaft 13 is inserted into the insertion hole 22g of the tongue piece 22d when the lock portion 27A is opened and closed, and the tongue piece 22d is moved while being hooked on the branch shaft 13. Since there is a degree of freedom in the direction in which the branch shaft 13 is inserted, the branch shaft 13 can be easily inserted while avoiding obstacles such as the tension insulator 34.
After the branch shaft 13 is inserted into the insertion hole 22g, the branch shaft 13 can be rotated like a lever, or the branch shaft 13 can be rotated with the support shaft portion 14 as a rotation axis.
As described above, since the direction in which the attachment / detachment tool 1 is moved can be selected and the movable range of the attachment / detachment tool 1 is wide, the workability when the cover is attached / detached can be improved.
Further, since the tongue piece 22d and the branch shaft 13 can relatively move along the axial direction of the branch shaft 13, excessive deformation of the tongue piece 22d is suppressed, and breakage can be suppressed.

5 to 7, the opening and closing of the lock portion 27A located above the tension insulator 34 has been described. Next, the opening and closing of the lock portion 27B that is not located above the tension insulator 34 will be described.
FIG. 8A is a right side view of the retaining clamp cover 20. FIG. 8B is a diagram showing the tongue piece portion 22d immediately before inserting the branch shaft tip portion 13b into the insertion hole 22g of the lock portion 27B. FIG. 8C is a diagram showing the tongue piece 22d when the branch shaft 13 is inserted into the insertion hole 22g and the branch shaft 13 is pulled down.
As shown in FIG. 8A, the lock portion 27B is provided on the lower surface of the retaining clamp cover 20. In the closed state of the lock portion 27B, the insertion hole 22g of the tongue piece portion 22d is open in the vertical direction. As shown in FIG. 8B, when releasing the lock of the lock portion 27 in the locked state, the common operation rod 2 is operated to position the branch shaft tip portion 13b above the insertion hole 22g. Thereafter, as shown in FIG. 8C, when the branch shaft 13 is inserted into the insertion hole 22g and the common operation rod 2 is pulled down, the locking hole 22f of the tongue piece 22d passes through the head 21e of the locking projection 21d. Then the locked state is released.
As described above, the locked state of the lock portion 27B can be released from the lock portion 27B by a simple operation of inserting the branch shaft tip portion 13b into the insertion hole 22g and pulling down the common operation rod 2.

FIG. 9A is a view showing the tongue piece 22d when the support shaft 14 is inserted into the insertion hole 22g from below. FIG. 9 (b) is a diagram showing the tongue piece 22d when hooked on the hooking projection 21d.
As shown in FIG. 9A, in a state where the lock portion 27B is unlocked, the tongue piece portion 22d is in a hanging state. Therefore, while positioning the tip of the tongue piece 22d at the Y-shaped portion of the support shaft 14 and the branch shaft 13, and moving the tongue piece 22d, the support shaft 14 is inserted into the insertion hole 22g from the outer surface side of the tongue piece 22d. Insert. As shown in FIG. 9B, when the common operation rod 2 is pushed up while the support shaft portion 14 is inserted into the insertion hole 22g, the locking hole 22f of the tongue piece portion 22d passes through the head portion 21e of the locking projection 21d. And it is hung.
As described above, the lock portion 27B can be locked to the lock portion 27B by a simple operation of inserting the support shaft portion 14 into the insertion hole 22g and pushing up the common operation rod 2.

<About another type of lock part 127B>
FIG. 10A is a top view of a retaining clamp cover 120 different from the retaining clamp cover 20 of FIG. FIG. 10B is a front view of the retaining clamp cover 120. FIG. 11A is a diagram illustrating a lock portion 127 </ b> B provided in the retaining clamp cover 120. FIG. 11B is a diagram illustrating the lock portion 127B in which the lock is released. The attachment / detachment tool 1 of the present embodiment can also be used for opening and closing the lock portion 127B.

The retaining clamp cover 120 shown in FIGS. 10A and 10B has the same configuration as the retaining clamp cover 20 of FIG. In brief, the retaining clamp cover 120 is connected to the first cover piece 121 and the second cover piece 122 that can be freely opened and closed via a hinge portion 123, and the retaining clamp 32 is connected between the two cover pieces 121 and 122. And a lock portion 127 (127A, 127B) for maintaining the closed state when closed in a state interposed between the two.
In the closed state, the first cover piece 121 and the second cover piece 122 are provided with a clamp accommodating portion 124 capable of accommodating the retaining clamp 32, an overhead wire guide 125 for guiding the overhead wire 31, and a rear shaft 34 a of the tension insulator 34. A possible insulator arrangement 126 is formed.
As shown in FIGS. 10B and 11A, two first hook pieces 121 a are arranged at a lower edge of the first cover piece 121 with an interval therebetween, and At the lower end edge and at a position corresponding to the first latching piece 121a, two second latching pieces 122a are arranged at intervals. The first hooking piece 121a and the second hooking piece 122a are rectangular plate pieces extending downward from the lower edges of the cover pieces 121, 122.

As shown in FIGS. 11A and 11B, the first hook piece 121a is provided with a hook hole 121b, and the second hook piece 122a is provided with a conical hook projection 122b. I have. A set of the first latching piece 121a and the second latching piece 122a constitutes a lock portion 127B. That is, by making the first hooking piece 121a and the second hooking piece 122a adhere to each other, the hooking projection 122b of the second hooking piece 122a is fitted into the hooking hole 121b of the first hooking piece 121b, The first hook 121a and the second hook 122a are locked.
In order to lock the lock portion 127B, for example, an indirect hot wire tool such as an insulated screw is used to hold the first hooking piece 121a and the second hooking piece 122a in close contact with each other. On the other hand, to release the locked state of the lock portion 127B, the detachable tool 1 of the present embodiment can be used.

When releasing the locked state of the lock portion 127B, for example, as shown in FIG. 11 (a), the support shaft portion 14 is inserted into the contact portion between the first hooking piece 121a and the second hooking piece 122a, and the first The gap between the hook piece 121a and the second hook piece 122a is widened. Since the support shaft portion 14 has a flat shape that is thinner toward the tip end like a flathead screwdriver, the support shaft portion 14 can be easily formed at a contact point (gap) between the first hook piece 121a and the second hook piece 122a. Can be inserted. Further, the operator can easily grasp the direction of the tip of the support shaft portion 14 (the direction of the flat shape) based on the protruding direction of the branch shaft 13.
Next, as shown in FIG. 11B, the branch shaft 13 is inserted into the widened gap, and the branch shaft 13 is rotated about the main shaft 12. The branch shaft tip portion 13b has a flat shape having a vertical surface parallel to the axial direction of the common operation rod 2. For this reason, the tip end portion 13b of the branch shaft can be easily inserted into the gap formed at the abutting portion of the both hook pieces 121a, 122a.
With the above operation, the locking projection 21d can be removed from the locking hole 22f, and the locked state of the lock portion 27 can be released.
Above the insulator disposing portion 126, a lock portion 127A composed of a set of a latching projection 121c and a tongue piece 122c is provided. The lock portion 127A has the same configuration as the lock portion 27A of the retention clamp cover 20 of FIG.

FIGS. 12A to 12C are views for explaining still another type of lock portion 227. FIG. This lock portion 227 is provided above the insulator disposition portion, similarly to the lock portion 27A of the first embodiment.
In the retaining clamp cover 220 shown in FIGS. 12A to 12C, the first cover piece 221 is provided with a hooking projection 221a, and the second cover piece 222 is provided with a tongue piece 222a. The hooking projection 221a has a triangular plate-shaped head 221b like a bird's beak, and a columnar support 221c provided at the base end of the head 221b. The tongue piece 222a has a base 222b having a semicircular tip end and an eave 222c provided along the edge of the base 222b. The latch hole 222d is provided at a portion of the substrate portion 222b facing the latch protrusion 221a. The insertion hole 222e is provided on the front side of the retaining clamp cover 220 in the eave portion 222c.
In the lock portion 227, when the tongue piece 222a is hooked on the hook projection 221a to lock the lock portion 227, the branch shaft 13 is inserted into the insertion hole 222e of the eave portion 222c, and the tongue piece 222a is hooked. It is drawn to the stop projection 221a side. Similarly, when releasing the locked state of the lock portion 227, the branch shaft 13 is inserted into the insertion hole 222e of the eave portion 222c, and the tongue piece portion 222a is moved in a direction away from the hooking projection 221a.
In the attachment / detachment tool 1 according to the present embodiment, the branch shaft 13 projects laterally from an appropriate position of the main shaft 12. Therefore, even when opening and closing the cover 220 from below the retaining clamp cover 220, the branch shaft 13 can be used. 13 can be easily inserted into the insertion hole 222e, and workability can be improved.

<About the second embodiment>
In the tip tool 3 of the first embodiment, the proximal end of the branch shaft 13 is welded to the distal end of the main shaft 12, but the present invention is not limited to this configuration. FIG. 13 is a front view of a tip tool 100 according to the second embodiment of the present invention. The tip tool 100 according to the second embodiment is characterized in that the main shaft 102, the support shaft 103, and the branch shaft 104 are made of one steel material.
As shown in FIG. 13, the tip tool 100 of the second embodiment has a straight rod-shaped main shaft 102 and a support shaft having a curved tip by bending the tip of a round bar steel material having a diameter of 5 mm into a U-shape, for example. Part 103 is formed. Furthermore, the branch shaft 104 is formed by bending a round bar steel material toward the distal end at the base end of the support shaft portion 103.
This tip tool 100 can be used similarly to the tip tool 3 of the first embodiment. Therefore, the description of the method of use is omitted.
Since the tip tool 100 of the second embodiment can be manufactured by appropriately bending one round steel bar, there is an advantage that the manufacture is easier than the tip tool 3 of the first embodiment. Further, in the tip tool 100, since the tip of the spindle portion 103 has a curved shape that is convex toward the tip, there is an advantage that the high-pressure cover such as the retaining clamp cover 20 is not easily damaged.

<About the modification>
In each of the above-described embodiments, the attachment and detachment work of the attachment clamp cover 20 and the like covering the attachment clamp 32 has been exemplified. However, the attachment and detachment work of the high-pressure cover other than the attachment clamp cover 20 can be used.
With respect to the main shafts 12 and 102, those extending in the axial direction of the common operation rod 2 from the tip of the common operation rod 2 have been exemplified, but the present invention is not limited to this configuration. The main shaft 12 may extend obliquely with respect to the axial direction of the common operation rod 2.
Although the support shaft portion 14 according to the first embodiment has a minus driver shape, the front end of the support shaft portion 14 may have a spherical shape convex toward the front end side instead.
In each of the above-described embodiments, the tip tools 3 and 100 detachably attached to the tip of the common operation rod 2 are exemplified. However, the tip tools 3 and 100 may be dedicated tools that cannot be detached from the operation rod.

<Summary of Configuration, Function, and Effect of the Present Invention>
A first aspect of the present invention is a tool for attaching and detaching a high-pressure cover (an attachment clamp cover 20) (tool 1 for attaching and detaching), wherein the high-pressure cover has two openable and closable pieces (a first cover piece 21 and a second cover). Piece 22) and a lock portion (lock portion 27) that maintains the closed state when the object to be protected (the retention clamp 32) is closed with the interposition between the two opening and closing pieces, and the lock portion is A first lock piece (hook 21d) provided on one opening / closing piece and a fitting hook hole (hook hole 22f) provided on the other opening / closing piece for fitting and hooking the first lock piece. , And a second lock piece (tongue piece 22d) having a tool insertion hole (insertion hole 22g). The detachable tool includes an operation rod (shared operation rod 2) and an end of the operation rod. A main shaft (main shaft 12) extending from the main shaft, a branch shaft (branch shaft 13) protruding laterally from an appropriate position of the main shaft, A support shaft portion (support shaft portion 14) provided at the tip of the shaft and serving as a rotation shaft at the time of operation, wherein the branch shaft is inserted into the tool insertion hole, and the fitting engagement hole is formed with respect to the first lock piece. When performing the attaching / detaching operation, the support shaft portion comes into contact with the high-pressure cover and serves as a rotation shaft.

With this attachment / detachment tool, the branch shaft can be inserted into the tool insertion hole of the second lock piece when the lock portion is opened and closed, and the first lock piece can be moved while being hooked on the branch shaft. Since there is a degree of freedom in the insertion direction of the branch shaft, the branch shaft can be easily inserted while avoiding obstacles such as tension insulators. Further, even after the branch shaft is inserted into the tool insertion hole, the direction in which the attachment / detachment tool is moved can be selected, and the movable range of the attachment / detachment tool is wide, so that the workability when attaching / detaching the cover can be improved. it can.
Further, since the pivoting operation can be performed with the support shaft contacting the high-pressure cover as the rotation axis, the attachment / detachment tool can be stably rotated, and the workability can be improved. In addition, since the second lock piece can slide on the branch shaft, excessive deformation of the second lock piece is suppressed, and breakage can be suppressed.

In the second high-pressure cover attaching / detaching tool according to the second aspect of the present invention, the first lock piece (the engaging projection 21d) has a head (head 21e) whose surface is curved in a convex shape, and a support for supporting the head. (The support portion 21f), and the second lock piece is a flexible plate-shaped tongue piece (a tongue piece 22d).
With this attaching / detaching tool, the tongue piece can be easily moved while the branch shaft is inserted into the tool insertion hole of the tongue piece.

A third high-pressure cover attaching / detaching tool according to the present invention is characterized in that the tip of the branch shaft (branch shaft 13) has a flat shape having a vertical surface parallel to the axial direction of the operation rod.
With this attachment / detachment tool, the tip of the branch shaft can be easily inserted into the gap formed at the contact point between the lock pieces.

The fourth high-pressure cover attaching / detaching tool according to the present invention is characterized in that the tip of the support shaft (support shaft 14) has a flat shape.
With this attachment / detachment tool, the tip of the support shaft can be easily inserted into the abutting portion between the lock pieces.

A fifth high-pressure cover attaching / detaching tool according to the present invention is characterized in that the distal end of the support shaft (support shaft 14) has a curved shape that is convex toward the distal end.
With this attachment / detachment tool, it is possible to suppress damage to the high-pressure cover when the support shaft is used as the rotation shaft.

According to a sixth aspect of the present invention, there is provided a tool for attaching and detaching a high-pressure cover, wherein the object to be protected is an overhead wire anchoring clamp (an anchoring clamp 32) to which a high pressure is applied.
With this attaching / detaching tool, it is possible to improve the workability when attaching / detaching the cover to / from the high-pressure cover that covers the retaining clamp to which a high pressure is applied.

DESCRIPTION OF SYMBOLS 1 ... Detachable tool, 2 ... Common operation rod, 3 ... Tip tool, 12 ... Main shaft, 13 ... Branch shaft, 14 ... Support shaft part, 20 ... Retention clamp cover, 21 ... First cover piece, 21d ... Hook projection Reference numeral 21e: Head, 22: Second cover piece, 22d: Tongue piece, 22f: Hook hole, 22g: Insert hole, 27 (27A, 27B): Lock portion, 32: Retention clamp, 34: Tension insulator , 120: retention clamp cover, 127B: lock portion, 220: retention clamp cover, 227: lock portion

Claims (6)

A tool for attaching and detaching the high-pressure cover,
The high-pressure cover has two openable and closable pieces, and a lock part that maintains a closed state when the object to be protected is closed with the object interposed between the two pieces of the openable and closable pieces. A second lock having a first lock piece provided on one of the open / close pieces, a fitting hook hole provided on the other open / close piece for fitting the first lock piece, and a tool insertion hole. And a piece,
The attachment / detachment tool includes an operation rod, a main shaft extending from an end of the operation rod, a branch shaft protruding sideways from a proper position of the main shaft, and a rotation shaft provided at the tip of the main shaft for operation. And a supporting shaft portion,
When the branch shaft is inserted into the tool insertion hole and the fitting retaining hole is attached to and detached from the first lock piece, the support shaft portion comes into contact with the high-pressure cover and becomes the rotation shaft. A high-pressure cover attaching / detaching tool characterized by the above-mentioned. The first lock piece has a head whose surface is curved in a convex shape, and a support portion that supports the head,
2. The tool according to claim 1, wherein the second lock piece is a flexible plate-shaped tongue piece. 3.   The high-pressure cover attaching / detaching tool according to claim 1, wherein a tip of the branch shaft has a flat shape having a vertical surface parallel to an axial direction of the operation rod.   The tool for attaching and detaching a high-pressure cover according to any one of claims 1 to 3, wherein a tip of the spindle portion has a flat shape.   The tool for attaching / detaching a high-pressure cover according to any one of claims 1 to 3, wherein a tip of the spindle portion has a curved shape that is convex toward the tip.   The tool for attaching / detaching a high-pressure cover according to any one of claims 1 to 5, wherein the object to be protected is an anchoring clamp for an overhead wire to which a high voltage is applied.

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