JP3996689B2 - Indirect hot wire gripping tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an indirect hot wire gripping tool used for hot wire construction of a distribution line, and more particularly to an indirect hot wire gripping tool that can easily perform a locking operation and a unlocking operation of a portion that operates a gripping tool.
[0002]
[Prior art]
In recent years, in order to perform live line construction of distribution lines safely and efficiently, a gripping tool is provided at the tip of the insulating operation rod, and the gripping tool is remotely operated via a lever provided on the base end side of the insulation control rod. The indirect hot-line gripping tool is used.
[0003]
From the viewpoint of ease of use, the indirect live-line gripping tool holds the closed state of the gripping tool once it is gripped by the gripping tool, and locks it even if the lever that operates the gripping tool is released. There is a demand for the state to be maintained, and various types of devices equipped with a mechanism for locking a portion for operating the gripping tool have been proposed.
[0004]
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 this 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 can swing on the cover 110 via a support pin 130 fixed near one end thereof. Supported by The cover 110 is equipped with a lock mechanism for allowing the gripping tool to continue to grip the object to be gripped. This locking mechanism prevents the gripping tool from opening by restricting the rotation direction of the lever 120, and allows the gear 140 (ratchet gear) fixed to the support pin 130 and the gear 140 to be freely engaged and disengaged. A swingable lock lever 150 having a latching claw 151 (ratchet claw) at one end, a screw member 160 that is screwed into the cover 110 and restricts the swing range of the lock lever 150, and a gear 140. And a spring 170 that urges the lock lever 150 so as to maintain the locked state between the locking claw 151 and the locking claw 151. The lock lever 150 is swingably mounted on the cover 110 via a pin 180, and a lock release button 190 is provided on the other end opposite to the side on which the locking claw 151 is provided. Here, the gear 140 and the lock lever 150 allow only the rotation of the operation lever 120 in one direction (direction to close the gripping tool) in a state where the gear 140 and the locking claw 151 are locked. The unidirectional rotation mechanism that prevents the rotation in the other direction opposite to the above (the direction in which the gripper is opened) is configured.
[0005]
In order to grip the object to be gripped, the gripper is first completely opened. For this purpose, 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 and rotates in the clockwise direction in FIG. 13 against the spring force of the spring 17 to remove the locking claw 151 from the gear 140. Thereby, the operation lever 120 becomes a free state which can be rotated not only in one direction but also in the other direction opposite thereto. 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 away from the lock lever 150. As a result, the lock lever 15 is rotated counterclockwise in FIG. 13 by the spring force of the spring 170 to lock the locking claw 151 on the gear 140 (see FIG. 14). Thereafter, the operation lever 120 is rotated in one direction to close the gripping tool and grip the object to be gripped.
[0006]
In a state where the locking claw 151 is locked to the gear 140, the operation lever 120 is allowed to rotate in one direction (rotation in the direction of further closing the gripping tool), but in the other direction ( Therefore, the grasping state of the object to be grasped is maintained. That is, by restricting the rotation of the operation lever 120 in only one direction, the gripping tool is locked so as not to open.
[0007]
To open the gripping tool, 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 counterclockwise against the spring force of the spring 17 in the clockwise direction of FIG. The lock lever 15 is rotated by rotating the lock lever 15 against the spring force of the spring 17 in the clockwise direction of FIG. To cancel. Thereby, the operating lever 120 can be rotated in the other direction to open the gripping tool and remove the object to be gripped from the gripping tool.
[0008]
[Problems to be solved by the invention]
According to the lock mechanism, the screw member 160 is rotated in one direction to lock the operation lever 120, and the screw member 160 is rotated in the other direction to release the locked state of the operation lever 120. Alternatively, it is necessary to keep pushing the lock release button 190 against the spring force of the spring 170, and therefore the workability is inferior, and the improvement has been demanded.
[0009]
An object of the present invention is to provide an indirect hot-line gripping tool equipped with a lock mechanism that can be easily locked and unlocked.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a live-line gripping tool of the present invention is provided with an openable / closable gripping tool for gripping an object to be gripped, and for positioning the gripping tool at a working position by mounting the gripping tool at the tip. Insulating operation rod, an operation portion equipped with an operation lever for opening and closing the gripper on the proximal end side of the insulation operation rod so as to be swingable, and the insulation operation in which the operation lever of the operation portion is supported swingably A lock mechanism that is provided on a proximal end side of the rod and restricts the rotation of the operation lever, and the lock mechanism allows the operation lever to rotate in a direction to close the gripping tool, and A one-way rotation mechanism for preventing the operation lever from rotating in a direction to open the tool, and holding the one-way rotation mechanism at the time of locking, and releasing the one-way rotation mechanism at the time of unlocking; In both the closing and opening directions Serial control lever is allowed to rotate, characterized by comprising; and a locking operation section provided with a pivotable locking lever member.
[0011]
In the indirect live wire gripping tool, the one-way rotating mechanism includes a gear fixed to a pin that fixes the operation lever and supports it swingably on the proximal end side of the insulating operation rod, A mechanism including a locking claw member that is detachably locked is preferable.
[0012]
The lock lever member is preferably fixed to the locking claw member.
[0013]
In addition, the lock operation unit includes a lock position in which the lock lever member is maintained in a locked state with the locking claw member and the gear to hold the one-way rotation mechanism, and the locking claw member is moved from the gear. The holding lever is held at any one of the unlocking positions for releasing the one-way rotation mechanism so as to allow the operation lever to rotate in either the closing direction or the opening direction. A lock plate is preferably provided.
[0014]
The lock plate includes a lock engagement recess for holding the lock lever member at the lock position and a lock release engagement recess for holding the lock lever member at the lock release position. The member includes: a swingable lock pin that is engaged with the lock engagement recess or the lock release engagement recess; and an elastic member that biases the lock pin toward the lock engagement recess and the lock release engagement recess. It is preferable to provide.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
[0016]
FIG. 1 is a front view of an entire indirect hot wire gripping tool according to an embodiment of the present invention, FIG. 2 is a partially enlarged front view of a lock mechanism provided in the indirect hot wire gripping tool of FIG. 1, and 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. 6 is the lock mechanism portion of FIGS. 7 is an enlarged front view of the lock plate, FIG. 7 is a front view for explaining the use state of the indirect hot wire gripping tool of FIG. 1, and FIG. 8 is for explaining the state of operating the lock lever member with the thumb of the hand holding the operation lever. FIG. 9 is a front view for explaining the relationship between the lock plate and the lock pin at the locked position, FIG. 10 is a rear view thereof, and FIG. 11 is a diagram for explaining the relationship between the lock plate and the lock pin at the unlocked position. FIG. 12 is a front view for the purpose.
[0017]
As shown in FIG. 1, the indirect hot-line gripping tool of the present embodiment includes a gripping tool 10 including a fixed gripping piece 11 and a rotating gripping piece 12 arranged so as to be able to contact and separate from the fixed gripping piece 11. An insulating operation rod 20 for mounting the gripping tool 10 at the tip and positioning the gripping tool 10 at a working position, and a rotating gripping piece 12 with respect to the fixed gripping piece 11 (rotating operation) An operating portion 30 that is swingably mounted on the base end side of the insulating operating rod 20, and a lock mechanism 40 that is provided near the operating lever 31 of the operating portion 30 and locks the operating lever 31. Is provided.
[0018]
The fixed gripping piece 11 is fixedly arranged at the tip of the insulating operating rod 20, and the rotary gripping piece 12 is pivotally attached to the lower end portion of the fixed gripping piece 11 via the pivot pin 13. Is done.
[0019]
The lower end portion of the rotating gripping piece 12 is connected to the upper end portion of the auxiliary insulating operation rod 32 provided in parallel with the insulating operation rod 20. A lower end portion of the auxiliary insulation operation rod 32 is rotatably connected to one end of the operation lever 31 via a connection pin 34.
[0020]
As shown in FIGS. 2 and 3, the operation lever 31 is substantially L-shaped and constitutes the operation unit 30 together with the auxiliary insulating operation rod 32, and a portion near one end thereof is fixed to the support pin 35. The support pin 35 is rotatably mounted on one end side (left side in FIG. 2) of the cover 41 of the lock mechanism 40 disposed 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.
[0021]
When the operating lever 31 is gripped and the operating lever 31 is rotated in the direction of arrow A in FIG. 2, the auxiliary insulation operating rod 32 is pulled down, and the rotating gripping piece 12 is rotated toward the fixed gripping piece 11. The gripping tool 10 is closed, and grips an object to be gripped such as an insulating cover that covers a connection portion of the distribution line, an insulation coating that is peeled off from the distribution line, and the like. On the other hand, when the operation lever 31 is rotated in the direction opposite to the arrow A direction in FIG. 2, the auxiliary insulating operation rod 21 is pushed up, and the rotary gripping piece 12 is rotated away from the fixed gripping piece 11 and gripped. The tool 20 is opened and the gripped object such as the insulation coating is released.
[0022]
As shown in FIGS. 2 and 3, the lock mechanism 40 is provided on the cover 41 and allows the operation lever 31 to rotate in the direction to close the gripping tool 20, but the operation lever in the direction to open the gripping tool 20. The one-way rotation mechanism 42 that prevents the 31 from rotating, and the one-way rotation mechanism 42 when the lock is released, and when the lock is released, the one-way rotation mechanism 42 is released and the gripping tool 20 is closed and opened. A lock operation portion 44 having a rockable lock lever member 43 that allows the operation lever 31 to rotate in any direction.
[0023]
The one-way rotation mechanism 42 includes a ratchet gear 42a fixed to the support pin 35, and a ratchet claw 42b as a locking claw member that is detachably engaged with the ratchet gear 42a, and the tip of the ratchet claw 42b. 2 is allowed to rotate in the direction of arrow A in FIG. 2 (rotation in the direction of closing the gripping tool 20), but is opposite to the direction of arrow A in the state where the lever is engaged with the ratchet gear 42a. Rotation in the direction (rotation in the direction of opening the gripping tool 20) is prevented.
[0024]
The lock operation unit 44 includes a lock lever member 43 and a lock plate 45 that holds the lock lever member 43 at one of a lock position and a lock release 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 31 is allowed to rotate in the direction of arrow A in FIG. In this state, the rotation in the direction opposite to the arrow A direction is prevented (the locked state where the one-way rotation mechanism 42 is held). On the other hand, when the lock lever member 43 is held at the unlocked position by the lock plate 45, the ratchet pawl 42b is disengaged from the ratchet gear 42a, and the rotation of the operation lever 31 in the direction of arrow A in FIG. It will be in the state which permits any rotation in the direction (unlocked state with the one-way rotation mechanism 42 released).
[0025]
As shown in FIGS. 4 and 5, the lock lever member 43 has an upper end fixed to a pivot pin 46 rotatably mounted on the cover 41, and a lower end of the hand that holds the operation lever 31. It protrudes from the cover 41 so that it can be operated with the thumb. The rear end of the ratchet pawl 42b is fixed to the pivot pin 46, and the ratchet pawl 42b and the lock lever member 43 are integrated, and the ratchet pawl 42b is moved to the ratchet gear 42a by swinging the lock lever member 43. It can be engaged and disengaged.
[0026]
At an intermediate height position of the lock lever member 43, a lock pin 47b is provided so as to be swingable in the vertical direction with the pin 47a protruding from the side surface of the lock lever member 43 (see FIG. 5). An elastic member 48 for urging the lock pin 47b toward the lock plate 45 is provided in an attachment hole 43a formed in the axial direction 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 that protrudes from the mounting hole 43a by the coil spring 48a and presses against the lock pin 47b (see FIG. 5), and is screwed into the hole 43a from the lower end of the lock lever member 43. The spring force of the coil spring 48 a is adjusted by the combined screw member 49.
[0027]
The lock plate 45 is fixed at a lower position on the outer surface (the right side in FIG. 2) of the other end side of the cover 41, and as shown in FIG. 6, a lock locking recess for maintaining the lock lever member 43 in the lock position on the lower edge thereof. 45a and the lock release latching recessed part 45b which maintains the lock lever member 43 in a lock release position are formed. Between the lock latching recess 45a and the unlocking latching recess 45b, the portion between them is inclined upward from one end side to the other end side of the cover 41 (inclined upward from the left side to the right side in FIG. 2). As a result, a taper portion 45c is formed that ensures a smooth transition of the lock pin 47b from the lock engagement recess 45a to the lock release engagement recess 45b.
[0028]
Here, the lock pin 47b is pressed by the pressing pin 48b and is locked to the lock locking recess 45a or the lock release locking recess 45b, but resists the spring force of the coil spring 48a that biases the pressing pin 48b. Thus, it can swing in the vertical direction. Therefore, when the lock lever member 43 locks the one-way rotation mechanism 42 (when the latched claw 42b and the ratchet gear 42a are held in a locked state), the operation lever 31 is rotated in the direction of arrow A in FIG. Accordingly, the ratchet pawl 42b is allowed to ride on the teeth of the ratchet gear 42a. That is, the lock lever member 43 is allowed to rotate slightly 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 lock position to the lock release position, the lock lever member 43 is also allowed to shift from the lock release position to the lock position.
[0029]
9 and 10 show a state in which the lock pin 47b is pressed by the pressing pin 48b and the lock pin 47b is locked in the lock locking recess 45a. From this state, as shown in FIGS. When the locking recess 45a passes through the taper portion 45c to reach the unlocking locking recess 45b, it is pressed by the taper portion 45c, and the lock pin 47b rotates downward with the pin 47a as a fulcrum. When the lock pin 47b climbs over the portion of the taper portion 45c that protrudes to the lowermost position adjacent to the lock release locking recess 45b, the lock pin 47b is released from the taper portion 45c and moved upward by the spring force of the coil spring 48a. And is locked in the unlocking recess 45b. On the contrary, when the lock lever member 43 moves from the unlocked position to the locked position, the lock pin 47b protrudes to the lowermost part of the tapered portion 45c adjacent to the unlocking engagement recess 45b. It is pressed by the part that has been turned and pivots downwards. When this part is overcome, the coil spring 48a smoothly moves into the lock engaging recess 45a and engages with the lock engaging recess 45a.
[0030]
The inclination direction of the tapered portion 45c may be inclined downward from one end side to the other end side of the cover 41 (inclined downward from the left side to the right side in FIG. 2). In this case, the shift of the lock lever member 43 from the unlock position to the lock position is facilitated, but the shift of the lock lever member 43 from the lock position to the unlock position is slightly difficult, but the lock lever member 43 It is possible to forcibly press and shift from the locked position to the unlocked position.
[0031]
Further, instead of forming the taper portion 45c, a portion between the lock engagement recess 45a and the lock release engagement recess 45b is cut horizontally so that the lock lever member 43 is shifted from the unlock position to the lock position. Both of the shift from the lock position of the lock lever member 43 to the lock release position may be facilitated.
[0032]
Next, the usage method of the indirect hot-line gripping tool of the said Example is demonstrated with reference to FIG. 7 thru | or FIG.
[0033]
In order to make the gripping tool 10 fully open, the lock lever member 43 is first rotated to the unlocking position (the lock pin 47b is locked to the unlocking locking recess 45b) and the ratchet pawl 42b is moved. Remove from the ratchet gear 42a. As a result, the operation lever 43 is brought into a free state, and by rotating the operation lever 43 in the direction opposite to the arrow A direction in FIG. Can be fully open.
[0034]
When the gripping tool 10 is completely opened, the lock lever member 43 is rotated to the lock position (the lock pin 47b is locked to the lock locking recess 45a), and the ratchet pawl 42b is locked to the ratchet gear 42a. This locked state is maintained. Next, after the object to be grasped is interposed between the rotational gripping piece 12 and the fixed gripping piece 11 and is rotated in the direction of arrow A in FIG. The object to be grasped is grasped by rotating to the fixed grasping piece 11 side (see FIG. 7). Since the latching of the ratchet pawl 42b and the ratchet gear 42a prevents the operation lever 31 from rotating in the direction opposite to the arrow A direction in FIG. The gripping state by is maintained.
[0035]
When the object to be grasped is conveyed to a predetermined location, the object to be grasped is released from the grasping tool 10. In this case, as shown in FIG. 8, the thumb of the hand holding the operation lever 31 is used to rotate the lock lever member 43 to the unlock position (the lock pin 47b is engaged with the lock release locking recess 45b). When the ratchet pawl 42b is removed from the ratchet gear 42a, the operation lever 31 is in a free state. Therefore, the operation lever 31 is rotated in the direction opposite to the arrow A direction in FIG. open.
[0036]
As described above, it is only necessary to rotate the lock lever member 43 to the lock position or the unlock position. To lock, the screw member 160 is rotated in one direction, as shown in FIGS. To release the locked state, it is not necessary to rotate the screw member 160 in the other direction or press the lock release button 190 against the spring force of the spring 170.
[0037]
In the above embodiment, the ratchet pawl 42b and the ratchet gear 42a are used as the one-way rotating mechanism 42. However, the present invention is not limited to this. Of course, it can be adopted. In short, the mechanism is not limited to the mechanism shown in the above embodiment as long as it is a mechanism that can lock and unlock the one-way rotation mechanism with the finger of the hand that holds the operation lever.
[0038]
【The invention's effect】
As described above, according to the indirect hot wire gripping tool of the present invention, the unidirectional rotating mechanism can be locked and unlocked only by the swinging operation of the lock lever member. After gripping, the work of closing the gripping tool and gripping the object to be gripped can be easily performed.
[0039]
Moreover, since the lock mechanism is provided on the base end side of the insulating operation rod, it can be operated with the finger (thumb) of the hand holding the operation lever, and gripping work using the gripping tool is extremely difficult. Easy to do.
[Brief description of the drawings]
FIG. 1 is a front view of an entire indirect hot wire gripping tool according to 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.
FIG. 3 is a rear view of the lock mechanism portion of FIG. 2;
4 is a front view of a lock lever member of the lock mechanism portion of FIGS.
FIG. 5 is a rear view of the lock lever member of FIG. 4;
6 is an enlarged front view of the lock plate of the lock mechanism portion of FIGS.
7 is a front view for explaining a use state of the indirect hot-line gripping tool of FIG.
FIG. 8 is a partially enlarged front view illustrating a state in which the lock lever member is operated with the thumb of the hand holding the operation lever.
FIG. 9 is a front view for explaining the relationship between the lock plate and the lock pin at the lock position.
FIG. 10 is a rear view of the same.
FIG. 11 is a front view for explaining the relationship between the lock plate and the lock pin at the unlocking position.
FIG. 12 is a rear view of the same.
FIG. 13 is a front view for explaining a lock release state of a conventional lock mechanism.
FIG. 14 is a front view for explaining a lock state of a conventional lock mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Holding tool 20 Insulation 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 board 48 Elastic member

Claims (5)

In indirect hot wire gripping tools,
An insulating operation rod equipped with an openable / closable gripper for gripping an object to be gripped at the tip;
An operating lever that is rotatably mounted on a base end side of the insulating operating rod via a support pin, the operating lever opening and closing the gripping tool by rotating the operating lever; and
A gear fixed to the support pin;
A locking claw member that is swingably provided with respect to the insulating operation rod and that can be detachably locked to the gear, and when the locking tool is locked to the gear, A locking claw member that allows the operation lever to rotate in a closing direction, but prevents the operation lever from rotating in a direction to open the gripping tool;
A lock lever member fixed to the latching claw member and swingable, comprising an elastic member and a lock pin swingable against the biasing force of the elastic member;
A lock plate formed with a lock engagement recess and a lock release engagement recess that can be engaged with the lock pin urged by the elastic member,
When the lock lever member rotates, when the lock pin is engaged with the lock engagement recess, the engagement between the engagement claw member and the gear is maintained, and the lock pin is engaged with the lock. The indirect live-line gripping tool, wherein the locking claw member and the gear are unlocked when locked in the release locking recess.   2. The indirect hot wire gripping tool according to claim 1, wherein a taper portion that is inclined in a direction toward a distal end of the insulating operation rod is formed from the unlocking recessed portion of the lock plate to the lock retaining recess.   2. The indirect hot wire gripping tool according to claim 1, wherein a tapered portion that is inclined in a proximal direction of the insulating operation rod is formed from the unlocking recessed portion of the lock plate to the lock retaining recess.   The portion between the unlocking engagement recess and the lock engagement recess of the lock plate is not inclined with respect to either the distal direction or the proximal direction of the insulating operation rod. The indirect hot wire gripping tool described in 1.   The mounting hole is formed in the lock lever member so as to extend in the axial direction, and the elastic member is provided in the mounting hole so as to protrude from one end of the mounting hole. The indirect hot wire gripping tool according to claim 1.

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