JPH11346410A - Indirect hot-line gripper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the locking and unlocking operation easily by installing a locking pin member, which locks a unidirectional rotation mechanism at locking and unlocks it and allows an operation lever to rotate in either a gripper closing direction or opening direction at the time of unlocking. SOLUTION: When a locking mechanism 40 allows an operation lever 31 to be rotated in a closing direction of a gripper 20, it prevents the operation lever 31 to rotate in the gripper opening direction (to rotate in a direction opposite to that shown by the arrow A) by means of a unidirectional rotating mechanism 42. A lock pin 43 locks the unidirectional mechanism 42 at the time of locking and unlocks it and allows the operation over 31 to rotate in either the gripper closing or opening direction at unlocking. Due to this structure, locking and unlocking operation can be made easily with only one hand for gripping the operation lever 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indirect hot-line gripping tool used for live-line construction of distribution lines, and more particularly, to an indirect hot-line gripping tool for easily performing a lock operation and a lock release operation of a grip operating portion. It relates to a line gripping tool.

[0002]

2. Description of the Related Art In recent years, in order to safely and efficiently perform hot work on distribution lines, a gripping tool is provided at the tip of an insulating operating rod, and the gripping tool is provided via a lever provided at a base end side of the insulating operating rod. An indirect hot-line gripping tool that is remotely operated by the operator is used.

[0003] From the viewpoint of ease of use, an indirect hot-line gripping tool once grips an object with a gripper, holds a closed state of the gripper, and raises a hand from a lever for operating the gripper. There is a demand that the locked state can be maintained even when the gripping tool is released. For this reason, various devices equipped with a mechanism for locking the operating portion of the gripper have been proposed.

For example, a lock mechanism as shown in FIGS. 7 and 8 has been proposed. According to FIG.
A cover 110 is provided on the base end side of the cover 1.
10 is equipped with an operation lever 120. Operation lever 1
Reference numeral 20 denotes a gripper (not shown) provided at the tip of the insulating operation rod 100, which is remotely opened and closed. The gripper 20 is swingably supported by the cover 110 via a support pin 130 fixed near one end thereof. Is done. The cover 110 is equipped with a lock mechanism for keeping the gripper from gripping the object to be gripped. This lock mechanism prevents the gripping tool from opening by restricting the rotation direction of the lever 120. A rockable lock lever 150 having a locking claw 151 (ratchet claw) at one end for locking, and a screw member 160 screwed to the cover 110 to regulate a range of rocking of the lock lever 150.
And a spring 17 for urging the lock lever 150 to maintain the locked state between the gear 140 and the locking claw 151.
0. The lock lever 150 is swingably mounted on the cover 110 via the pin 180, and
Lock release button 1 on the other end opposite to the side provided with 51
90 are provided. Here, the gear 140 and the lock lever 150 allow only rotation in one direction (the direction in which the gripper is closed) while the gear 140 and the locking claw 151 are locked. A one-way rotation mechanism that prevents rotation in the opposite direction (the direction in which the gripper is opened) is prevented.

In order to grip an object to be gripped, first, the gripping tool is completely opened. This includes the screw member 160
Is rotated in one direction to protrude toward the lock lever 150 as shown in FIG. The lock lever 150 is pressed by the screw member 160, rotates clockwise in FIG. 7 against the spring force of the spring 170, and releases the locking claw 151 from the gear 140. Thereby, the operation lever 120 is
It is in a free state in which it can rotate not only in one direction but also in the opposite direction. In this state, the gripper is completely opened by the operation lever 120. Next, the screw member 160 is rotated in the other direction and moved in a direction away from the lock lever 150. As a result, the lock lever 150 rotates counterclockwise in FIG. 7 by the spring force of the spring 170 to lock the locking claw 151 to the gear 140 (see FIG. 8). Thereafter, the operation lever 120 is rotated in one direction to close the gripper and grip the object to be gripped.

When the locking claw 151 is locked to the gear 140, rotation of the operation lever 120 in one direction (rotation in a direction to further close the gripper) is allowed, but rotation in the other direction is allowed. Since the rotation (rotation in the opening direction of the gripper) is prevented, the gripped state of the object to be gripped is maintained. That is, by restricting the rotation of the operation lever 120 in only one direction, the gripper is locked so as not to open.

To open the gripper, as described above, the screw member 160 is rotated in one direction so as to protrude toward the lock lever 150, and the lock lever 150 is pressed against the spring force of the spring 170 as shown in FIG. Rotate clockwise or press the unlock button 190 to release the lock lever 15
0 is rotated clockwise in FIG. 7 against the spring force of the spring 170 to release the locking claw 151 from the gear 140,
Release the lock. Thus, the operation lever 120 can be rotated in the other direction to open the gripper, and the object to be gripped can be removed from the gripper.

[0008]

According to the lock mechanism, the screw member 160 is used to lock the operation lever 120.
Is rotated in one direction, and the unlocked state of the operation lever 120 is released by rotating the screw member 160 in the other direction or by pressing the lock release button 190 against the spring force of the spring 170. It was necessary to continue, and the workability was inferior, and improvement was demanded.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an indirect hot-line gripping tool equipped with a lock mechanism for easily performing locking and unlocking operations with a hand gripping an operation lever.

[0010]

In order to achieve the above object, a live wire gripping tool according to the present invention is provided with an openable / closable gripping tool for gripping an object to be gripped at the tip of an insulated operating rod. An indirect hot-line gripping tool equipped with an operating portion having a swingable operating lever for opening and closing the gripping tool on the base end side of the tool, further comprising a lock mechanism for restricting rotation of the operating lever, wherein the lock mechanism is A control device that is provided on the proximal end side of the insulating operation rod and allows the operation lever to rotate in the closing direction of the gripper, but prevents the rotation of the operation lever in the opening direction of the gripper. A directional rotation mechanism, holding the one-way rotation mechanism when locked, releasing the one-way rotation mechanism when unlocking, and rotating the operation lever in both directions of closing and opening the gripper. On the operating lever Characterized by comprising comprises a slidably-equipped locking pin member.

[0011] The one-way rotating mechanism is mounted on a ratchet gear fixedly mounted on the base end side of the insulating operating rod, and is swingably mounted on the operating lever, and is removably engaged with the ratchet gear. It is preferable to form a ratchet pawl member.

It is preferable that an urging member is interposed between the ratchet pawl member and the operation lever to urge the ratchet pawl member to lock the ratchet gear.

Further, the lock pin member is formed in a rod shape, and the operating lever is slid in a direction perpendicular to the axial direction of the ratchet pawl member in a state where the ratchet pawl member is in contact with the urging member. It is preferable to equip it.

Further, the lock pin member has a different outer diameter from a lock portion for maintaining the engagement between the ratchet pawl member and the ratchet gear, and the ratchet pawl member and the ratchet against the urging means. It is preferable to provide a lock release part for releasing the engagement with the gear.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a front view of an entire indirect hot-line gripping tool showing one embodiment of the present invention, FIG. 2 is a partially enlarged front view of a lock mechanism provided in the indirect hot-line gripping tool of FIG. 1, and FIG. FIG. 4 is a partially enlarged front view of the lock mechanism when the gripper is kept closed, FIG. 4 is a side view of the same, FIG. 5 is a partially enlarged front view of the lock mechanism when the lock is released from the state of FIG. 6 is a side view of the same.

As shown in FIG. 1, the indirect hot-line gripping tool according to the present embodiment includes a fixed gripping piece 11 and a rotary gripping piece 12 arranged to be able to contact and separate from the fixed gripping piece 11. Tool 10, an insulating operating rod 20 equipped with the gripping tool 10 at the tip to position the gripping tool 10 at the working position, and an operation of moving the rotating gripping piece 12 to and from the fixed gripping piece 11 (rotating). An operating unit 30 provided with an operating lever 31 for swinging operation on the proximal end side of the insulating operating rod 20 and a lock provided near the operating lever 31 of the operating unit 30 to lock the operating lever 31 And a mechanism 40.

The fixed gripping piece 11 is fixedly arranged at the tip of the insulating operating rod 20, and the rotating gripping piece 12 can pivot at its lower end portion toward the lower end portion of the fixed gripping piece 11 via a pivot pin 13. Is pivoted to.

The lower end of the rotary gripping piece 12 is
It is connected to the upper end of the auxiliary insulating operation rod 32 mounted in parallel with the zero. The lower end of the auxiliary insulating operation rod 32 is
Is rotatably connected to one end of the operation lever 31 via the.

As shown in FIG. 2, the operating lever 31 is substantially L-shaped, and constitutes the operating portion 30 together with the auxiliary insulating operating rod 32. A portion near one end thereof is fixed to the support pin 35. The support pin 35 is rotatably mounted in a concave portion 41a on one end side (left side in FIG. 2) of the cover 41 of the lock mechanism 40 arranged on the base end side of the insulating operation rod 20. That is, the operation lever 31 is moved together with the support pin 35 into the cover 41.
It is equipped to be rotatable with respect to.

When the operation lever 31 is gripped,
2 is rotated in the direction of arrow A in FIG. 2, the auxiliary insulating operation rod 32 is pulled down, and the rotating gripping piece 12 is
The gripping tool 10 is closed by rotating to one side, and grips an object to be gripped, such as an insulating cover that covers the connection portion of the distribution line and an insulating coating that is peeled off from the distribution line. On the other hand, when the operating lever 31 is rotated in the direction opposite to the direction of arrow A in FIG. 2, the auxiliary insulating operating rod 21 is pushed up, and the rotating gripping piece 12 is rotated away from the fixed gripping piece 11 and gripped. The tool 10 opens and releases the gripped object such as the insulating coating.

As shown in FIG. 2, the lock mechanism 40 rotates the operation lever 31 in a direction to close the gripper 10 (arrow A).
To rotate the operation lever 31 in the direction),
The operation lever 31 is rotated in a direction to open the gripper 20 (arrow A).
And a one-way rotation mechanism 42 for preventing the operation lever 31 from rotating in the opposite direction to the first direction.
2 to release the one-way rotation mechanism 42 when the lock is released, and to allow the operation lever 31 to rotate in both the closing direction and the opening direction of the gripper 20. 43.

The one-way rotation mechanism 42 includes a ratchet gear 4
4 and a ratchet pawl member 45 which is detachably engaged with the ratchet gear 44. Ratchet gear 44
Is fixed to the inner surface of one of the walls in the concave portion 41a of the cover 41 by a screw 46. The ratchet pawl member 45 is swingably mounted via a pin 31b in a substantially U-shaped mounting portion 31a provided on the operation lever 31.

The ratchet pawl member 45 is fixed to a pin 31b, and the pin 31b is rotatably mounted on the mounting portion 31a. That is, the ratchet pawl member 45
Rotates (swings) with respect to the mounting portion 31a together with the pin 31b.
It becomes possible. In this embodiment, the ratchet claw member 45 is
Claw portion 45a on the upper end side to be locked to ratchet gear 44
And an axially extending groove 31c provided on the operation lever 31
And a substantially L-shaped lower end side operation part 45b
And the two are integrated through a pin 31b. It is needless to say that the claw portion 45a and the operation portion 45b may be integrally formed without being divided into two parts. A coil spring 47 as an urging member is interposed between the inner surface on the lower end side of the operation portion 45b and the bottom surface of the groove 31c opposed thereto. The coil spring 47 has a ratchet claw member 45 (claw portion 45).
a) is urged to rotate toward the ratchet gear 44 with the pin 31b as a fulcrum. As a result, the ratchet pawl member 45 (pawl portion 45a) normally
4 is maintained.

When the pawl portion 45a of the ratchet pawl member 45 is engaged with the ratchet gear 44, the operation lever 31 rotates in the direction of arrow A in FIG. 2 (rotation in the direction to close the gripper 20). However, rotation in the direction opposite to the arrow A direction (rotation in the direction in which the gripper 20 is opened) is prevented.

The lock pin 43 is mounted on a mounting portion 31 a provided on the operation lever 31 so as to be slidable in a direction perpendicular to the axis of the operation lever 31 (see FIGS. 4 and 6). The urged operating portion 45b of the ratchet pawl member 45 abuts. The lock pin 43 has head portions 43a at both ends in the axial direction,
The shaft portion between these heads 43a is a lock portion 4 having a small diameter.
3b, an unlocking portion 43c having a larger diameter than this,
It is partitioned into a tapered portion 43d between the lock portion 43b and the unlock portion 43c.

When the operating portion 45b of the ratchet claw member 45 abuts on the lock portion 43b (see FIGS. 3 and 4), the outer diameter of the lock portion 43b is small, and the ratchet claw member 45 is ratchet geared by the lock portion 43b. Since it is not pressed so as to rotate in the direction away from 44 (counterclockwise direction in FIG. 3), the claw portion 4 of the ratchet claw member 45 is not pressed.
The state where 5a is locked to the ratchet gear 44 by the urging force (elastic force) of the coil spring 47 is maintained (locked state). In this locked state, the operation portion 4
5b is pressed against the urging force of the coil spring 47, the ratchet claw member 45 (claw portion 45a)
It is possible to rotate in the direction away from the ratchet gear 44 with the b as a fulcrum and temporarily release the locked state. When the pressing of the operation portion 45b is stopped, the ratchet claw member 45 rotates toward the ratchet gear 44 by the restoring elastic force of the coil spring 47, and the locked state between the claw portion 45a and the ratchet gear 44 is maintained.

On the other hand, when the operating portion 45b of the ratchet pawl member 45 abuts on the unlocking portion 43c (see FIGS. 5 and 6), the ratchet pawl 43 has a large outer diameter. The member 45 is the unlocking section 4
The claw portion 45a of the ratchet claw member 45 separates from the ratchet gear 44 (becomes an unlocked state) by being pressed by 3c and rotating in a direction away from the ratchet gear 44 (counterclockwise in FIG. 3).

The tapered portion 43c is formed so that the diameter gradually increases from the lock portion 43b to the unlock portion 43c (so that the diameter decreases gradually from the unlock portion 43c to the lock portion 43b). From unlocked state (see FIGS. 5 and 6) to locked state (see FIGS. 3 and 4)
When the lock pin 43 moves to the
Is prevented from being caught on the operation portion 45b.

Next, a method of using the indirect hot-line gripping tool of the above embodiment will be described.

In order to completely open the gripper 10, for example, the lock pin 43 is pressed with the thumb of the hand gripping the operation lever 31 and slid in one direction, and the lock release portion 43c is moved to the ratchet pawl member 45. When the ratchet claw member 45 is positioned on the operation portion 45b of the
Of the ratchet gear 4 against the urging force of the coil spring 47.
4 and the locked state is released.
Thereby, the operation lever 31 is in a free state, and by rotating the operation lever 31 in the direction opposite to the direction of arrow A in FIG.
And the gripper 10 can be completely opened.

When the gripper 10 is completely opened, this time, the lock pin 43 is pressed with the index finger of the hand gripping the operation lever 31 and slid in the other direction opposite to the previous one, and the lock portion 43b is moved to the ratchet claw member 45. When the ratchet claw member 45 is positioned on the operation portion 45b of the
, The pawl portion 45a is rotated by the urging force of the coil spring 47 in a direction in which the pawl portion 45a is locked to the ratchet gear 44, and the lock state is established. In this locked state, the operation lever 31 is allowed to rotate only in the direction of arrow A in FIG. Next, the object to be grasped is moved between the rotating grasping piece 12 and the fixed grasping piece 1.
2, and while rotating the operation lever 31 in the direction of arrow A in FIG.
Rotates toward the fixed gripping piece 11 to grip the object to be gripped. As shown in FIG. 3 and FIG.
Since the rotation in the direction opposite to the direction is prevented, the gripping state by the gripper 10 is maintained even when the hand is released from the operation lever 31.

When the object to be gripped is transported to a predetermined place, the object to be gripped is released from the gripping tool 10. In this case, the lock pin 43 is pressed with the thumb of the hand gripping the operation lever 31 and slid in one direction, and the lock release portion 43c is positioned on the operation portion 45b of the ratchet claw member 45 to release the locked state. Then, the operating lever 31 is rotated in the direction opposite to the direction of arrow A in FIG.

When the operating portion 45b of the ratchet claw member 45 is pressed against the urging force of the coil spring 47 with the index finger of the hand holding the operating lever 31, the claw portion 4 is pressed.
5a is separated from the ratchet gear 44 and temporarily enters the unlocked state. The gripping tool 10 can be opened by rotating the operation lever 31 in the direction opposite to the direction of arrow A in FIG. 2 while maintaining the state where the operation portion 45b of the ratchet claw member 45 is pressed with the index finger.

As described above, the lock pin 43 only needs to be slid with the thumb or the like of the hand holding the operation lever 31, and as shown in FIGS. 7 and 8, the screw member 160 is turned in one direction to lock. It is not necessary to rotate the screw member 160 in the other direction or to push the lock release button 190 against the spring force of the spring 170 in order to move and release the locked state.

In the above embodiment, the one-way rotating mechanism 4
Although the case where the ratchet gear 44 and the ratchet claw member 45 are used as 2 is shown, the present invention is not limited to this, and it is needless to say that various mechanisms allowing only one-way rotation can be adopted. In short, the mechanism is not limited to the mechanism described in the above embodiment as long as the mechanism can lock and unlock the one-way rotation mechanism with the finger of the hand holding the operation lever.

[0037]

As described above, according to the indirect hot-line gripping tool of the present invention, since the lock pin is slidably provided on the operation lever, the lock pin is slid with the finger of the hand holding the operation lever. Thus, the locked state and the unlocked state can be achieved, and the operation of completely opening the gripper to grip the object to be gripped, and then closing the gripper and gripping the object to be gripped can be performed extremely easily.

[Brief description of the drawings]

FIG. 1 is a front view of an entire indirect hot-line gripping tool showing an embodiment of the present invention.

FIG. 2 is a partially enlarged front view of a lock mechanism provided in the indirect hot-line gripping tool of FIG. 1;

FIG. 3 is a partially enlarged front view of a lock mechanism when the closed state of the gripper is maintained.

FIG. 4 is a side view of the lock mechanism of FIG. 3;

FIG. 5 is a partially enlarged front view of the lock mechanism when the lock is released from the state of FIG. 3;

FIG. 6 is a side view of the lock mechanism of FIG.

FIG. 7 is a front view illustrating an unlocked state of a conventional lock mechanism.

FIG. 8 is a front view illustrating a locked state of a conventional lock mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Grasping tool 20 Insulating operation rod 30 Operation part 31 Operation lever 32 Auxiliary insulation operation rod 40 Lock mechanism 41 Cover 42 One-way rotation mechanism 43 Lock pin 43b Lock part 43c Unlock part 43d Taper part 44 Ratchet gear 45 Ratchet claw member 45a Claw Part 45b Operation part 47 Biasing member (coil spring)

Claims (5)

[Claims] 1. An operation having an openable / closable gripper for gripping an object to be gripped at a distal end of an insulating operating rod, and a swingable operating lever for opening / closing the gripper at a base end side of the insulating operating rod. In an indirect hot-line gripping tool equipped with a part, a lock mechanism for restricting rotation of the operation lever is provided, and the lock mechanism is mounted on a base end side of the insulating operation rod, and is provided in a closing direction of the gripper. A one-way rotation mechanism that permits the rotation of the operation lever but prevents the operation lever from rotating in the opening direction of the gripper; and a one-way rotation mechanism that holds the one-way rotation mechanism when locked and releases the one-way rotation mechanism when unlocked. A lock pin member slidably mounted on the operation lever, which allows the operation lever to rotate in both directions of closing and opening the gripper by releasing the direction rotation mechanism. Specially Indirect hot-line gripping tool. 2. The indirect hot-line gripping tool according to claim 1, wherein the one-way rotating mechanism swings on a ratchet gear fixedly mounted on a base end side of the insulating operating rod and on the operating lever. An indirect hot-line gripping tool, comprising a ratchet pawl member, which is provided so as to be capable of engaging and disengaging from the ratchet gear. 3. The indirect hot-line gripping tool according to claim 2, wherein the ratchet pawl member is locked to the ratchet gear by a biasing member interposed between the ratchet pawl member and the operation lever. An indirect hot-line gripping tool, characterized in that the tool is biased to perform the operation. 4. The indirect hot-line gripping tool according to claim 2, wherein the lock pin member is rod-shaped, and the axis of the ratchet pawl member is in a state where the ratchet pawl member is brought into contact with the urging member. An indirect hot-line gripping tool, which is provided on the operation lever so as to slide in a direction perpendicular to the direction. 5. The indirect hot-line gripping tool according to claim 3, wherein the lock pin member has different outer diameters and maintains a lock between the ratchet claw member and the ratchet gear. And an unlocking portion for unlocking the ratchet claw member and the ratchet gear against the urging means.