JP5889940B2 - Indirect hot wire work tool - Google Patents

Description

  The present invention relates to an indirect hot wire working tool used for gripping an overhead electric wire or the like in indirect hot wire work, and more particularly to a stray link tong that sandwiches the overhead electric wire or the like between a hook portion and a movable body (jaw).

  As an indirect hot wire work tool used for indirect hot wire work in a high-voltage distribution line, when holding an electric wire or holding a straight sleeve, a so-called stray link tong is used (Patent Documents 1, 2, etc.) reference).

  This stray link tong 1 is as shown in FIG. 5, and is configured by providing a head 3 as a gripping metal fitting at the tip of an insulating operation rod 2.

  The insulating operation rod 2 is formed of a cylindrical (pipe-shaped) insulating member, and a draining collar 4 is fitted and fixed to an intermediate portion of the insulating operation rod. Further, below the draining collar 4, In order to prevent an electric shock accident, a safety limit collar 5 is fitted and fixed to clarify the boundary between a portion that can be gripped and other portions.

  The head 3 is made of a hard metal such as an aluminum alloy, and includes a head body 6 having a U-shape and a movable portion 7 that is movable in the axial direction of the insulating operation rod 2.

  The head body 6 is located at the upper part of the U-shape, and has a claw-shaped hook part 61 that is hooked on an electric wire or the like, and a base end that is disposed below the hook part 61 and is located at the lower part of the U-shape. And a side wall portion 63 provided so as to connect one side end of each of the hook portion 61 and the base end portion 62.

  A rotating cylindrical body 10 having a through hole in which an internal thread is formed on the inner peripheral surface is rotatably mounted on the base end portion 62 while being restricted from moving in the axial direction.

  The movable portion 7 holds the electric wire in cooperation with the head body 6 and a rod-shaped screw shaft body 12 formed with a male screw meshing with a female screw on the inner peripheral surface of the through hole of the rotating cylindrical body 10. And a jaw 13 capable of (gripping). The jaw 13 has a concave portion on the surface facing the side wall portion 63 of the head main body 6, and is attached to the tip end of the screw shaft body 12 in a non-rotatable state with the side wall portion 63 fitted in the concave portion. The insulating operation rod 2 has a distal end fixed to the proximal end of the rotating cylindrical body 10, and a screw that has passed through the rotating cylindrical body 10 when the screw shaft body 12 is most retracted inside the distal end. A space capable of storing the end of the shaft body 12 is formed.

  Accordingly, when the insulating operation rod 2 is rotated, the rotating cylindrical body 10 is rotated accordingly, and the side wall portion 46 is fitted in the concave portion of the jaw 13, so that the screw shaft body screwed with the rotating cylindrical body 10 is engaged. 12 does not rotate together, and is screwed back and forth in the axial direction with respect to the base end portion 62.

  When attaching such a stray link tong 1 to the overhead electric wire 50, first, the insulating operation rod 2 is rotated until the electric wire 50 can be inserted between the hook portion 61 of the head body 6 and the jaw 13 of the movable portion 7. Let loosen. Then, the head 3 is brought close to the electric wire with the insulating operation rod 2, the electric wire is inserted between the hook portion 61 of the head 3 and the jaw 13, and the hook portion 61 is hooked on the electric wire 50. When the insulating operation rod 2 is rotated in the tightening direction of the electric wire 50 in this state, the rotating cylindrical body 10 rotates with the rotation of the insulating operation rod 2.

  The head 3 tries to rotate together in the rotation direction of the insulating operation rod 2, but the hook portion 61 of the head body 6 is locked so as to twist the electric wire 50. Accordingly, since the head 3 is prevented from rotating by the electric wire 50 and the jaw 13 is prevented from rotating by the side wall portion 63 of the head body 6, the screw shaft body 12 moves forward (the jaw 13 moves forward toward the hook portion 61. Thus, the electric wire 50 can be tightened between the hook portion 61 and the jaw 13.

  When the insulating operation rod 2 is rotated in the reverse direction, the rotating cylinder 10 rotates in the same direction as the insulation operation rod 2 rotates, the head 3 is prevented from rotating by the electric wire 50, and the jaw 13 is the head. Since the rotation is prevented by the side wall portion 63 of the main body 6, the screw shaft body 12 screwed into the rotating cylindrical body 10 is retracted (the jaw 13 is retracted toward the base end portion 62), and the hook portion 61 and the jaw 13 are The interval between and is widened.

  Incidentally, a disc-like circular gear member 31 is fixed immediately below the base end portion 62 of the head main body 6 of the insulating operation rod 2. On the periphery of the surface of the circular gear member 31 facing the head 3, teeth 31a projecting toward the head are formed. The base end portion 62 of the head body 6 is provided with a locking claw 32 that locks back of the movable portion 7. The locking claw 32 can be slid in the axial direction of the insulating operation rod 2 by operating the lock operation knob 34. The locking claw 32 is slid to the insulation operation rod 2 side to move the locking claw 32 to the above-mentioned position. By engaging with the teeth 31 a of the circular gear member 31, it has a function of regulating the rotation direction of the insulating operation rod 2.

  Here, the tooth 31a of the circular gear member 31 has a gently inclined surface facing the locking claw 32 in the rotational direction in which the jaw 13 is advanced, and is locked in the rotational direction in which the jaw 13 is retracted. The surface facing the claw 32 is a surface substantially perpendicular to the end surface of the circular gear member.

  For this reason, even when the locking claw 32 is in contact with the teeth 31a of the circular gear member 31, if the insulating operation rod 2 is rotated in the direction in which the jaw 13 is advanced, the locking claw 32 is gently inclined. Since it is possible to get over the surface, the rotation is allowed and the jaw 13 can move forward. When the insulating operation rod 2 is rotated in the reverse direction, the locking claw 32 abuts on the substantially vertical surface and rotates. Since it is blocked, the retraction of the jaw 13 is restricted.

JP 2009-232579 A JP 2010-68582 A

  However, although the above-described conventional stray link tong 1 utilizes a lock mechanism in accordance with the work, the head 3 has a center of gravity closer to the side wall when used without being locked by the locking claw 32. Therefore, when the insulation operating rod 2 is inclined and approached to the electric wire, the opening of the head 2 faces upward, and it becomes difficult to insert the electric wire 50 between the hook portion 61 and the jaw 13.

  For this reason, it is necessary to be in a locked state by a lock mechanism so that the head does not rotate, but when removing the head from the electric wire or when correcting the holding position of the electric wire, in order to release the locked state, It was necessary to use other indirect hot-line tools such as bind punches at the same time, which required work labor.

  Further, once the lock is released, it is necessary to return the lock mechanism to the locked state again using an indirect hot wire tool, or to pull the lock operation knob to the hand and operate it by hand, which is troublesome.

  The present invention has been made in view of such circumstances, and indirect hot-wire work that enables locking and unlocking of the rotation of the head in a state of being hooked on an overhead wire without using another indirect hot-wire tool. The main challenge is to provide tools for use.

  In order to achieve the above object, an indirect hot wire working tool (strain link tong) according to the present invention includes a head body having a hook portion at a tip portion, and a movable body facing the hook portion at a tip portion. A head having a movable portion is attached to a tip of an insulating operation rod, and includes a mechanism for adjusting the distance between the hook portion and the movable body by moving the movable body by rotation of the insulating operation rod. In the above configuration, the insulating operation rod is connected to the distal end side rod-like body fixed to the head main body, and is rotatably connected to the distal end side rod-like body, thereby rotating the movable body of the movable portion. A proximal end-side rod-shaped body that is moved in the axial direction of the insulating operation rod, and one rod-shaped body in the vicinity of the boundary between the proximal-end-side rod-shaped body and the distal-end-side rod-shaped body extends along the outer peripheral edge. Projecting toward the other rod A circular gear member is formed, and is fixed to the other rod-like body so as to be movable in the axial direction of the insulating operation rod in the vicinity of the boundary between the proximal-end-side rod-like body and the distal-end-side rod-like body. A locking claw that can be locked to the teeth of the gear member is provided.

Therefore, since the circular gear member and the locking claw that can be locked to the teeth of the circular gear member are provided not at the upper end portion of the insulating operation rod but at the boundary portion between the proximal side rod-like body and the distal end side rod-like body, A circular gear member and a locking claw can be disposed in the vicinity of holding the operating rod by hand, and the locking claw can be operated by hand without pulling the insulating operating rod toward the front.
For this reason, when performing locking / unlocking, it is not necessary to use another indirect live tool, and there is no inconvenience that the operation is interrupted due to the locking / unlocking operation.

  As a specific configuration example of the above-described tool for indirect hot-wire work, the head main body is provided with a hook portion at a distal end portion and a base end portion at a position facing the hook portion, and the movable portion is And a mechanism for adjusting the distance between the hook portion and the movable body, the male shaft of the screw shaft body and A rotating member having a meshing internal thread formed on the inner peripheral surface is rotatably attached to the base end, and the movable body is moved by the rotation of the rotating member so that the distance between the hook portion and the movable body is increased. If adjusted, the insulating rod is connected to the distal end side rod-shaped body fixed to the head main body, and the distal end side rod-shaped body is rotatably connected to the distal end side rod-shaped body and rotates integrally with the rotating member. The distal end side rod of the proximal end side rod-shaped body In the vicinity of the boundary with the body, a circular gear member formed with teeth projecting in the distal direction of the insulating operation rod along the outer peripheral edge is fixed, and the vicinity of the boundary between the distal end side rod-like body and the proximal end side rod-like body Further, a locking claw that is fixed so as to be movable in the axial direction of the insulating operation rod and that can be locked to the teeth of the circular gear member may be provided.

  In addition, it is preferable that the said front end side rod-shaped body and the said base end side rod-shaped body are connected so that it can rotate in the part which grasps a common operation rod with a hand, ie, below a safety limit collar.

  As described above, according to the indirect hot wire working tool according to the present invention, the insulating operation rod includes the distal end side rod-like body fixed to the head body, and the proximal end side rod-like body rotatably connected thereto. A circular gear member formed with teeth protruding toward the other rod-shaped body along the outer peripheral edge in the vicinity of the boundary between the proximal-side rod-shaped body and the distal-end-side rod-shaped body Is fixed to the other rod-like body so as to be movable in the axial direction of the insulating operation rod and is locked to the teeth of the circular gear member. Since the possible latching claw is provided, it becomes possible to perform locking / unlocking at hand without using other indirect hot wire tools.

FIG. 1 is an external view showing a configuration example of an indirect hot wire working tool according to the present invention. FIG. 2 is a diagram showing a cross-sectional structure of the indirect hot wire working tool shown in FIG. 1, and shows a state where no electric wire is held on the hook portion. FIG. 3 is a diagram showing a cross-sectional structure of the indirect hot wire working tool shown in FIG. 1 and shows a state where an electric wire is held on a hook portion. FIG. 4 is a diagram showing an operation process for holding an electric wire using the indirect hot wire working tool according to the present invention, (a) shows a state before holding the electric wire, and (b) shows an electric wire. It is a figure which shows the state hold | maintained. FIG. 5 is a diagram showing a conventional stray link tong.

  Hereinafter, embodiments of an indirect hot wire working tool according to the present invention will be described with reference to the drawings.

In FIG. 1 thru | or FIG. 3, the structural example of the stray link tong 1 as an indirect hot wire work tool which concerns on this invention is shown.
The stray link tong 1 includes an insulating operation rod 2 and a head 3 as a holding fitting attached to the distal end portion of the insulation operation rod 2.

The insulating operation rod 2 is formed of a hollow cylindrical insulating member, such as an epoxy resin-based reinforced plastic, a polyester resin-based reinforced plastic, or the like that is not easily deformed.
A draining collar 4 as a measure against rainfall is fitted and fixed to the middle part of the insulating operation rod, and below this draining collar 4 a part that can be gripped and other parts to prevent an electric shock accident The safety limit collar 5 for clarifying the boundary is fitted and fixed.

  The head 3 is made of a hard metal such as an aluminum alloy, and has a head body 6 having a U-shape (C-shaped clamp shape) and a movable portion 7 that can move forward and backward in the axial direction of the insulating operation rod 2. doing.

  The head body 6 is located at the upper part of the U-shape, and has a claw-shaped hook part 61 that is hooked on an electric wire or the like, and a base end that is disposed below the hook part 61 and is located at the lower part of the U-shape. A portion 62 and a side wall portion 63 provided so as to connect one side end of each of the hook portion 61 and the base end portion 62 are configured.

The base end portion 62 is formed with a through hole 8 penetrating substantially in the center thereof in the axial direction of the insulating operating rod 2, and the through hole 8 has a through hole 9 having an inner peripheral surface formed with a female screw. A cylindrical body (rotating member) 10 is rotatably inserted.
The rotating cylindrical body 10 is formed with flange portions 10a and 10b whose diameters are enlarged at the upper and lower ends, and movement in the axial direction is restricted by the flange portions 10a and 10b.

  The movable portion 7 includes a rod-shaped screw shaft body 12 having a male screw meshed with a female screw on the inner peripheral surface of the through-hole 9 of the rotary cylindrical body 10, and the screw on the upper end of the screw shaft body 12. A jaw (movable body) 13 that is attached so as not to rotate relative to the shaft body 12 and that can hold (grip) the electric wire in cooperation with the head body 6 is provided.

  The jaw 13 has a recess 13a formed on the surface of the head body 6 facing the side wall 63, and is attached to the tip of the screw shaft body 12 in a relatively non-rotatable manner with the side wall 63 fitted in the recess 13a. It has been. The screw shaft body 12 is inserted through the rotating cylindrical body 10 from the lower end portion of the jaw 13 and is inserted into the distal end portion of the insulating operation rod 2, and an accommodation space 25a formed at the distal end portion of the relay rod 25 described later. The tip is housed in

  The insulating operation rod 2 is fixed to the head main body 6 and attached to the head main body 6 so as not to rotate relative to the head main body 6. The proximal end side rod-shaped body 22 that rotates integrally with the rotating cylindrical body 10 is provided.

  The distal end side rod-like body 21 is formed to have a length that allows the draining collar 4 and the safety limit collar 5 to be fitted and fixed, and an area that can be gripped by hand below the safety limit collar 5 and a lock mechanism 30 described later. It is formed in such a length that a region where the locking claw 32 is attached is secured.

  The proximal end side rod-like body 22 is rotatably fitted to the lower end portion of the distal end side rod-like body 21 with its axis center aligned with the distal end side rod-like body 21, and a common operation rod or an adder is provided at the lower end. A joint fitting 23 for attaching and removing a rod or the like is attached. Further, in this example, the base end side rod-like body 22 is provided with a fitting portion 22a fitted inside from the lower end opening of the tip end side rod-like body 21, and from the fitting portion 22a to the tip side rod-like body 21. A relay rod 25 extending through the interior to the rotating cylinder 10 is provided.

  This relay rod 25 is fixed so as to rotate integrally with the base end side rod-like body 22, and its distal end is fixed to the rotating cylindrical body. In addition, an accommodation space 25a is formed at the distal end of the relay rod so that the lower end side of the screw shaft body that has passed through the rotating cylindrical body 10 can be stored when the screw shaft body 12 is most retracted.

  Therefore, when the base end side rod-like body 22 is rotated, the rotating cylindrical body 10 is rotated via the relay rod 25 fixed to the base end side rod-like body 22, and the screw shaft body 12 screwed into the rotating cylindrical body 10 is Since the jaw 13 fixed to the tip is engaged with the side wall 63 of the head main body 6 and is prevented from rotating, the jaw 13 does not rotate together with the relay rod 25 and moves up and down.

  By the way, the movement in the direction opposite to the tightening direction (the direction in which the jaw 13 is brought close to the hook portion 61), that is, the backward movement of the movable portion 7 is locked at the boundary portion between the proximal end side rod-like body 22 and the distal end side rod-like body 21. A lock mechanism 30 is provided. The lock mechanism 30 includes a circular gear member 31 and a locking claw 32, and the circular gear member 31 is located in the vicinity of the boundary between the proximal end side rod-like body 22 and the distal end side rod-like body 21. The fitting is fixed. On the upper surface of the circular gear member 31, teeth 31 a are formed that protrude in the distal direction of the insulating operation rod 2 (on the distal end side rod-like body 21 side) along the outer peripheral edge.

  Further, in the vicinity of the boundary between the distal end side rod-like body 21 and the proximal end side rod-like body 22, it is fixed so as to be movable in the axial direction of the insulating operation rod 2, and can be engaged with the teeth 31 a of the circular gear member 31. Claws 32 are provided

  The teeth 31a provided on the circular gear member 31 have a gently inclined surface facing the locking claw 32 in the rotation direction (tightening direction) for moving the jaw 13 forward, and rotation for moving the jaw 13 backward. The surface facing the locking claw 32 in the direction is a substantially vertical surface, and therefore, when locked by the lock mechanism 30 (the locking claw 32 abuts on the teeth 31a of the circular gear member 31). In this case, if the insulation operating rod 2 is rotated in the direction in which the jaw 13 is moved forward, the locking claw 32 can get over the gently inclined surface. When the insulating operation rod 2 is rotated in the reverse direction, the locking claw 32 comes into contact with the substantially vertical surface and is prevented from rotating, so that the retraction of the jaw 13 is restricted. Have

  The locking claw 32 is accommodated in a locking claw receiving block 33 fixed to the base end portion of the distal end side rod-like body 21 and is held movably by a claw holding portion (not shown) in the longitudinal direction of the insulating operation rod 2. The locking operation knob 34 protrudes to the side of the pawl housing block 33 and moves together. Accordingly, the proximal end side rod-like body 22 is moved to the distal end side rod-like body by slidingly operating the lock operation knob 34 toward the proximal end side rod-like body 22 to engage the locking claw 32 with the teeth 31a of the circular gear member 31. It is structured to lock so as not to rotate with respect to 21.

  In the above configuration, the operation of gripping the electric wire 50 using the above-described stray link tong 1 will be described. First, the lock operation knob 34 is raised so that the locking claw 32 is separated from the teeth 31a of the circular gear member 31. The base end side rod-shaped body 22 is brought into a rotatable state. Then, in this state, the proximal end side rod-like body 22 is rotated to separate the jaw 13 from the hook portion 61, and a space is formed so that the electric wire 50 can be inserted between the distal end portion 61 a of the hook portion 61 and the jaw 13.

  Thereafter, the lock operation knob 34 is lowered and the locking claw 32 is engaged with the teeth 31a of the circular gear member 31 to form a locked state. The left hand grips between the safety limit collar 5 of the distal end side rod-shaped body 21 and the locking claw receiving block 33, and the right hand grips a portion below the circular gear member 31 of the proximal end-side rod-shaped body 22, 3 is lifted to approach the electric wire 50 (FIG. 4A), and the electric wire 50 is brought close to the electric wire 50 and the electric wire 50 is inserted into the head 3 from the opening (FIG. 4). (B)).

  At this time, since the head 3 is in the locked state, there is no inconvenience that the head 3 rotates, and the electric wire 50 is inserted from the opening of the head body 6 toward the intended direction of the opening of the head body 6. Is possible.

  And if the electric wire 50 is inserted between the hook part 61 and the jaw 13, if the proximal end side rod-shaped body 22 is rotated in the tightening direction with the right hand while holding the distal end side rod-shaped body 21 with the left hand, the jaw 13 The wire 50 moves forward toward the hook portion 61, and the electric wire 50 is held between the hook portion 61 and the jaw 13, and the attachment of the stray link tongue 1 to the electric wire 50 is completed.

  Further, in order to remove the stray link tongue 1 from the state in which the electric wire 50 is clamped between the hook portion 61 and the jaw 13, between the safety limit collar 5 of the distal end side rod-shaped body and the locking claw receiving block 33 with the left hand. Then, the lock operation knob 34 is raised to move the locking claw 32 away from the teeth 31a of the circular gear portion 31, and the locked state is released. If the proximal rod 22 is rotated in the direction of loosening with the right hand while the distal rod 21 is held with the left hand, the jaw 13 is separated from the hook 61 and the hook 61 is detached from the electric wire 50. The removal of the stray link tongue 1 is completed.

As described above, the circular gear member 31 and the locking claw 32 that can be locked to the teeth 31a are provided at the boundary portion between the proximal end side rod-like body 22 and the distal end side rod-like body 21, and the insulating operation rod 2 is manually moved. Since the locking claw 32 can be operated near the holding position, the locking / unlocking can be performed at hand without pulling the insulating operation rod 2 forward.
For this reason, when performing locking / unlocking, it is not necessary to use another indirect live tool, and there is no inconvenience that the operation is interrupted due to the locking / unlocking operation.

DESCRIPTION OF SYMBOLS 1 Stray link tong 2 Insulation operation rod 21 Front end side rod-shaped body 22 Base end side rod-shaped body 3 Head 5 Safety limit collar 6 Head main body 61 Hook part 62 Base end part 63 Side wall part 7 Movable part 10 Rotating cylindrical body 12 Screw shaft body 13 Jaw 31 Circular gear member 31a Teeth 32 Locking claw

Claims (3)

A head having a head main body having a hook portion at a tip portion and a movable portion having a movable body facing the hook portion at a tip portion is attached to the tip of an insulating operation rod, and by rotating the insulation operation rod In the tool for indirect hot-wire work provided with a mechanism for moving the movable body and adjusting the distance between the hook portion and the movable body,
The insulating operating rod is connected to the distal end side rod-like body fixed to the head body, and is rotatably connected to the distal end side rod-like body, thereby rotating the movable body of the movable portion of the insulating operating rod. A base end rod-shaped body that is moved in the axial direction,
A circular gear member in which teeth projecting toward the other rod-shaped body along the outer peripheral edge is fixed to one rod-shaped body in the vicinity of the boundary between the base-end-side rod-shaped body and the distal-end-side rod-shaped body,
In the vicinity of the boundary between the base end side rod-like body and the distal end side rod-like body, the other rod-like body is fixed so as to be movable in the axial direction of the insulating operation rod, and can be engaged with the teeth of the circular gear member. A tool for indirect hot wire work characterized in that a pawl is provided. The head body includes a hook portion at a distal end portion and a proximal end portion at a position facing the hook portion, and the movable portion includes a distal end of a screw shaft body in which a male screw is formed on an outer peripheral surface. Equipped with a movable body,
The mechanism that adjusts the distance between the hook portion and the movable body is configured to rotatably attach a rotating member having an internal thread formed on an inner peripheral surface thereof to mesh with the external thread of the screw shaft body to the base end portion, The movable member is moved by the rotation of the rotating member to adjust the distance between the hook part and the movable member,
The insulating operation rod includes a distal end side rod-like body fixed to the head body, and a proximal end side rod-like body that is rotatably connected to the distal end side rod-like body and rotates integrally with the rotating member. Configured
A circular gear member in which teeth projecting in the distal direction of the insulating operation rod along the outer peripheral edge is fixed in the vicinity of the boundary between the proximal end rod-shaped body and the distal end-side rod-shaped body,
In the vicinity of the boundary between the distal end side rod-like body and the proximal end side rod-like body, a locking claw that is fixed so as to be movable in the axial direction of the insulating operation rod and that can be engaged with the teeth of the circular gear member is provided. The indirect hot wire working tool according to claim 1.   The indirect hot wire working tool according to claim 1 or 2, wherein the distal end side rod-like body and the proximal end side rod-like body are rotatably connected below a safety limit collar.

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