JPH11205929A - Indirect live line holding tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to conduct a locking and unlocking operation of a live line holding section easily without requiring much labor, and to easily make a correct measurement. SOLUTION: A tool is provided with a holding tool 10 constituted of a fixed holding piece 11 and a rotating holding piece 12 located separably from the fixed holding piece 11, an insulating operation bar 20 which, being provided at the top end with the holding tool 10, is for positioning the holding tool 10 at a working position, an operating section 30 provided, at the side of the base of the insulating operation bar 20, with a rotatable operation lever for separating or bringing the rotating holding piece 12 from or into contact with the fixed holding piece 11 (rotating operation of the rotating holding piece 12), and a locking mechanism 40 having a locking lever member which, being installed near the operation lever 31 of the operating section 30, locks 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 holds a closed state of a gripping tool once it has been gripped by a gripping tool, and removes a hand from a lever for operating the gripping tool. It is also desired that the lock state can be maintained. For this reason, various devices equipped with a mechanism for locking a portion for operating a gripper have been proposed.

For example, a lock mechanism as shown in FIGS. 13 and 14 has been proposed. According to the figure, a cover 110 is provided on the base end side of the insulating operation rod 100, and the cover 110 is equipped with an operation lever 120. The operating lever 120 is used to remotely open and close a gripping tool (not shown) provided at the tip of the insulating operating rod 100, and covers the cover 110 via a support pin 130 fixed near one end thereof.
Is swingably supported. The cover 110 is equipped with a lock mechanism for keeping the gripper from gripping the object to be gripped. The lock mechanism prevents the gripping tool from opening by restricting the rotation direction of the lever 120. The lock mechanism is configured so that the gear 140 (ratchet gear) fixed to the support pin 130 and the gear 140 can be freely disengaged. A locking claw 151 (ratchet claw) for locking, which is rotatably engaged with a cover 110 and a swingable lock lever 150 having an end portion,
Screw member 16 for regulating the swing range of lock lever 150
0, and a spring 1 for urging the lock lever 150 so as to maintain the locked state between the gear 140 and the locking claw 151.
70. The lock lever 150 is a pin 180
The lock release button 190 is provided at the other end on the opposite side to the side where the locking claw 151 is 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 so as to protrude toward the lock lever 150 as shown in FIG. The lock lever 15 is pressed by the screw member 160, rotates clockwise in FIG. 13 against the spring force of the spring 17, and releases the locking claw 151 from the gear 140. As a result, the operation lever 120 enters a free state in which the operation lever 120 can rotate not only in one direction but also in the opposite direction. In this state, the operation lever 120
To completely open the gripper. 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 15 rotates counterclockwise in FIG. 13 by the spring force of the spring 170 to lock the locking claw 151 to the gear 140 (see FIG. 14). 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 15 is pressed against the spring force of the spring 17 as shown in FIG. The lock claw 151 is rotated clockwise or the lock release button 190 is pressed to rotate the lock lever 15 clockwise in FIG. Remove and unlock. 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 provided with a lock mechanism that can easily perform locking and unlocking operations.

[0010]

In order to achieve the above object, a hot-line gripping tool according to the present invention comprises an openable / closable gripper for gripping an object to be gripped, and a gripping tool provided with the gripper at its tip. An insulated operating rod for positioning the tool in the working position, an operating unit provided with an operating lever for opening and closing the gripper on the base end side of the insulated operating rod, and an operating lever of the operating unit swinging. A lock mechanism mounted on the base end side of the insulated operation rod movably supported and restricting rotation of the operation lever, wherein the lock mechanism rotates the operation lever in a direction to close the gripper. A one-way rotation mechanism that allows movement and prevents the operation lever from rotating in a direction to open the gripper, and holds the one-way rotation mechanism when locked.
At the time of unlocking, there is provided a swingable lock lever member that releases the one-way rotation mechanism and allows the operation lever to rotate in both directions of closing and opening the gripper. And a lock operation unit.

In the indirect hot-line gripping tool, as the one-way rotating mechanism, a gear fixed to a pin for fixing the operation lever and swingably supporting a base end side of the insulating operation rod, A mechanism including a locking claw member that is removably locked to the gear is preferable.

It is preferable that the lock lever member is fixed to the locking claw member.

[0013] The lock operating portion may further include: a lock position for holding the one-way rotation mechanism by maintaining the lock lever member to be locked between the locking claw member and the gear; Any position of a lock release position for releasing the one-way rotation mechanism so as to allow the operation lever to rotate in both directions of closing and opening the gripping tool by removing from the gear; It is preferable that a lock plate for holding the lock is provided.

Further, the lock plate includes a lock engagement recess for holding the lock lever member in the lock position, and a lock release engagement recess for holding the lock lever member in the unlock position. The lock lever member includes a swingable lock pin that locks in the lock lock recess or the lock release lock recess, and an elasticity that urges the lock pin to the lock lock recess or the lock release lock recess. And a member.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One 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. 2 is a rear view of the lock mechanism portion of FIG. 2, FIG. 4 is a front view of the lock lever member of the lock mechanism portion of FIGS. 2 and 3, FIG. 5 is a rear view of the lock lever member of FIG. 4, and FIG. FIG. 7 is an enlarged front view of a lock plate of a lock mechanism portion, FIG. 7 is a front view illustrating a use state of the indirect hot-line gripping tool of FIG. 1, and FIG. 8 is a state in which a thumb holding a control lever operates a lock lever member. 9 is a front view for explaining a relationship between a lock plate and a lock pin at a lock position, FIG. 10 is a rear view of the same, and FIG. 11 is a relationship between a lock plate and a lock pin at a lock release position. FIG. 12 is a rear view of FIG. That.

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 FIGS. 2 and 3, the operating lever 31 has a substantially L-shape, and includes an operating portion 3 together with an auxiliary insulating operating rod 32.
0, and one end thereof is fixed to the support pin 35. The support pin 35 is rotatably mounted on one end (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 rotatably mounted on the cover 41 together with the support pin 35.

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 20 opens and releases the grasped object such as the insulating coating.

The lock mechanism 40 is mounted on the cover 41 as shown in FIGS. 2 and 3, and allows the operation lever 31 to rotate in the direction to close the gripper 20, but the direction in which the gripper 20 is opened. A one-way rotation mechanism 42 for preventing the operation lever 31 from rotating at the same time, a direction in which the one-way rotation mechanism 42 is held when locked, and the one-way rotation mechanism 42 is released when the lock is released, and the gripper 20 is closed. Lock operation unit 4 having a swingable lock lever member 43 that allows the operation lever 31 to rotate in any direction of the opening direction.
4 is provided.

The one-way rotating mechanism 42 includes a ratchet gear 42a fixed to the support pin 35, and a ratchet gear 4a.
When the tip of the ratchet claw 42b is locked to the ratchet gear 42a, the ratchet claw 42b is engaged with the ratchet gear 42a. Although rotation in the direction (rotation in the direction in which the gripper 20 is closed) is permitted, 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 operating section 44 includes a lock lever member 4.
3 and a lock plate 45 for holding the lock lever member 43 at one of a lock position and an unlock position. When the lock lever member 43 is held at the lock position by the lock plate 45, the latched state between the ratchet pawl 42b and the ratchet gear 42a is maintained, and the operation lever 3 is held.
1 is allowed to rotate in the direction of arrow A in FIG.
A state in which rotation in the direction opposite to the direction is prevented (a locked state in which the one-way rotation mechanism 42 is held) is achieved. On the other hand, when the lock lever member 43 is held at the unlock position by the lock plate 45, the ratchet pawl 42b
a state in which both the rotation of the operation lever 31 in the direction of arrow A in FIG. 2 and the rotation of the operation lever 31 in the direction opposite to the direction of arrow A are permitted (the unlocked state in which the one-way rotation mechanism 42 is released). become.

As shown in FIGS. 4 and 5, an upper end of the lock lever member 43 is fixed to a pivot pin 46 rotatably mounted on the cover 41, and a lower end of the lock lever member 43 grips the operation lever 31. It protrudes from the cover 41 so that it can be operated with the thumb of the hand. Ratchet pawl 4 on pivot pin 46
2b is fixed at its rear end, and the ratchet pawl 42b and the lock lever member 43 are integrated with each other.
By swinging the ratchet 3, the ratchet pawl 42b can be engaged with the ratchet gear 42a in a detachable manner.

At an intermediate height position of the lock lever member 43, a lock pin 47b is provided so as to be vertically swingable with a lock pin 47b protruding from a side surface of the lock lever member 43 via a pin 47a (see FIG. 5). ). An elastic member 48 for urging the lock pin 47b toward the lock plate 45 is provided in an axially extending mounting hole 43a formed from the lower end of the lock lever member 43 to the intermediate height position. The elastic member 48 includes a coil spring 48a and a pressing pin 48b which protrudes from the mounting hole 43a by the coil spring 48a and presses against the lock pin 47b (FIG. 5).
), And a coil spring 48a is screwed by a screw member 49 screwed into the hole 43a from the lower end of the lock lever member 43.
The spring force of is adjusted.

The lock plate 45 is fixed at a position below the outer surface (the right side in FIG. 2) of the other end of the cover 41, and as shown in FIG. Locking recess 45a and lock lever member 43
Release locking recess 45b for maintaining the lock in the unlock position
Are formed. The portion between the lock engagement recess 45a and the lock release engagement recess 45b is inclined upward from one end to the other end of the cover 41 (inclined upward from left to right in FIG. 2). The tapered portion 45c is formed so that the lock pin 47b ensures a smooth transition from the lock locking recess 45a to the unlock locking recess 45b.

Here, the lock pin 47b is
8b, and is locked in the lock locking concave portion 45a or the lock releasing locking concave portion 45b, but may swing vertically in opposition to the spring force of the coil spring 48a for urging the pressing pin 48b. It is possible. Therefore, when the lock lever member 43 locks the one-way rotation mechanism 42 (when the locked state between the ratchet claw 42b and the ratchet gear 42a is maintained), the operation lever 31 is moved to the position shown in FIG.
The ratchet claw 42b is allowed to ride on the teeth of the ratchet gear 42a as the arrow A is rotated. That is, the lock lever member 43 is allowed to slightly rotate as the ratchet pawl 42b rides on the teeth of the ratchet gear 42a. In addition to allowing the lock lever member 43 to shift from the locked position to the unlocked position, the lock lever member 43 also allows shifting from the unlocked position to the locked position.

FIGS. 9 and 10 show a state in which the lock pin 47b is pressed by the pressing pin 48b and is locked in the lock locking recess 45a. FIG. 11 and FIG.
As shown in FIG. 7, when the lock pin 47b reaches the lock release lock concave portion 45b from the lock concave portion 45a through the taper portion 45c, the lock pin 47b is pressed by the taper portion 45c, and the lock pin 47b turns downward around the pin 47a as a fulcrum. Move. When the lock pin 47b passes over the lowermost portion of the tapered portion 45c that is adjacent to the lock release locking concave portion 45b, the lock pin 47b is released from the tapered portion 45c and is raised by the spring force of the coil spring 48a. To lock into the lock release locking concave portion 45b. Conversely, when the lock lever member 43 shifts from the unlocked position to the locked position, the lock pin 47b
Is pressed downward at the lowermost protruding portion of the tapered portion 45c adjacent to the lock release locking concave portion 45b, and pivots downward. However, when it gets over this portion, the lock force is applied by the spring force of the coil spring 48a. It smoothly moves into the stopping recess 45a and is locked in the lock locking recess 45a.

The inclination direction of the tapered portion 45c may be inclined downward from one end of the cover 41 to the other end (to be inclined downward from the left side to the right side in FIG. 2). In this case, it is easy to shift the lock lever member 43 from the unlocked position to the locked position, but it is slightly difficult to shift the lock lever member 43 from the locked position to the unlocked position. Can be forcibly pressed to shift from the locked position to the unlocked position.

Further, instead of forming the tapered portion 45c, the lock engagement recess 45a and the lock release engagement recess 45b
Is horizontally cut off, and the lock lever member 43 is cut off.
Both the shift from the lock release position to the lock position and the shift of the lock lever member 43 from the lock position to the unlock position may be facilitated.

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

In order to completely open the gripper 10, the lock lever member 43 is first rotated to the unlocked position (the lock pin 47b is unlocked by the lock release recess 45).
b) and release the ratchet pawl 42b from the ratchet gear 42a. Thereby, the operation lever 43 is in a free state, and by rotating the operation lever 43 in a direction opposite to the direction of arrow A in FIG.
Can be pulled away from the fixed gripping piece 11, and the gripping tool 10 can be completely opened.

When the gripper 10 is completely opened, the lock lever member 43 is rotated to the lock position (lock pin 4).
7b is locked to the lock locking recess 45a), and the ratchet pawl 42b is locked to the ratchet gear 42a to maintain this locked state. Next, the object to be gripped is turned to the rotary gripping piece 12.
When the operation lever 31 is turned in the direction of arrow A in FIG.
The rotating gripping piece 12 rotates toward the fixed gripping piece 11 to grip the object to be gripped (see FIG. 7). The locking of the ratchet pawl 42b and the ratchet gear 42a causes the operation lever 31 to move as shown in FIG.
Is prevented from rotating in the direction opposite to the arrow A direction, so that the gripping state of the gripper 10 is maintained even if 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 gripper 10. In this case, FIG.
As shown in the figure, the lock lever member 43 is rotated to the unlock position using the thumb of the hand holding the operation lever 31 (the lock pin 47b is locked in the lock release lock concave portion 45b), and the ratchet pawl 42b is rotated. The ratchet gear 42a
Then, the operation lever 31 is in a free state, so that the operation lever 31 is rotated in a direction opposite to the direction of the arrow A in FIG.

As described above, it is only necessary to rotate the lock lever member 43 to the lock position or the unlock position. As shown in FIGS. 13 and 14, the screw member 160 is rotated in one direction to lock. In order to release the locked state, the screw member 160 is rotated in the other direction, or
Alternatively, there is no need to press the lock release button 190 against the spring force of the spring 170.

In the above embodiment, the one-way rotating mechanism 4
Although the case where the ratchet pawl 42b and the ratchet gear 42a are used is shown as 2, 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.

[0038]

As described above, according to the indirect hot-line gripping tool of the present invention, the one-way rotation mechanism can be locked and unlocked only by the swing operation of the lock lever member. After opening and gripping the object to be gripped, the operation of closing the gripper and gripping the object to be gripped can be easily performed.

Further, since the lock mechanism is provided on the base end side of the insulating operating rod, it can be operated with the finger (thumb) of the hand gripping the operating lever, and the grip using the gripping tool is used. Work can be done very 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 rear view of the lock mechanism of FIG. 2;

FIG. 4 is a front view of a lock lever member of the lock mechanism shown in FIGS.

FIG. 5 is a rear view of the lock lever member of FIG. 4;

FIG. 6 is an enlarged front view of a lock plate of a lock mechanism shown in FIGS.

FIG. 7 is a front view for explaining a use state of the indirect hot-line gripping tool of FIG. 1;

FIG. 8 is a partially enlarged front view illustrating a state in which the lock lever member is operated by the thumb of the hand holding the operation lever.

FIG. 9 is a front view for explaining a relationship between a lock plate and a lock pin at a lock position.

FIG. 10 is a rear view of the same.

FIG. 11 is a front view for explaining a relationship between a lock plate and a lock pin at a lock release position.

FIG. 12 is a rear view of the same.

FIG. 13 is a front view illustrating an unlocked state of a conventional lock mechanism.

FIG. 14 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 lever member 44 Lock operation part 45 Lock plate 48 Elastic member

Claims (5)

[Claims] 1. An openable / closable gripper for gripping an object to be gripped, an insulating operating rod for mounting the gripper at a tip and positioning the gripper at a work position, and an operation for opening and closing the gripper. An operating unit having a lever swingably mounted on a base end side of the insulated operating rod; and an operating lever mounted on a base end side of the insulated operating rod on which the operating lever of the operating unit is swingably supported. A lock mechanism for restricting rotation of the gripper, wherein the lock mechanism allows the operation lever to rotate in a direction to close the gripper, and rotates the operation lever in a direction to open the gripper. A one-way rotating mechanism that prevents the one-way rotating mechanism from being held when locked, and releasing the one-way rotating mechanism when unlocked, in either the closing direction or the opening direction of the gripper. Allow the operation lever to rotate Yes, and a lock operation portion provided with a pivotable locking lever member, characterized by comprising, indirect hot-gripping tool. 2. The indirect hot-line gripping tool according to claim 1, wherein the one-way rotating mechanism includes a pin that fixes the operation lever and swingably supports the operation lever at a base end side of the insulating operation rod. An indirect hot-line gripping tool, comprising: a fixed gear; and a locking claw member that is removably locked to the gear. 3. The indirect hot-line gripping tool according to claim 2, wherein the lock lever member is fixed to the locking claw member. 4. The indirect hot-line gripping tool according to claim 2, wherein the lock operation section causes the lock lever member to maintain the engagement between the engagement claw member and the gear. A locking position for holding a direction rotation mechanism, and allowing the operation lever to rotate in both directions of closing and opening the gripper by removing the locking claw member from the gear, An indirect hot-line gripping tool, comprising: a lock plate that holds the one-way rotating mechanism at any position of a lock release position. 5. The indirect hot-line gripping tool according to claim 4, wherein the lock plate is configured to lock the lock lever member to the lock position by holding the lock lever member at the lock position. A lock release member that holds the lock pin. The lock lever member includes a swingable lock pin that locks the lock lock recess or the lock release lock recess, and the lock pin includes the lock pin or the lock lock recess. An indirect hot-line gripping tool, comprising: an elastic member that urges the lock release locking recess.