JP2001352626A - Wire-gripping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire-gripping device which facilitates the wire gripping operation and can improve the efficiency and safety of the gripping work. SOLUTION: A fixed side gripping half unit 31 and a movable side gripping half unit 32 whose gripping planes 33 and 34, in which semi-cylindrical recesses 33a and 34a are formed respectively, face each other are opened/closed by the manipulation of a lever 16 via a linking rod 22 and a swinging member 20. A locking mechanism (a locking member 18 with a nail 18a and teeth 14a formed on a flat plate member 14) is provided, so as to have the lever 16 locked, while a wire D is gripped by both the gripping half units 31 and 32. A guide shaft 38, which guides the wire D, so as to come to a position where the wire D is held between both the recesses 33a and 34a when both the gripping half units 31 and 32 are closed, while it is brought into contact with the outer circumference of the wire D, is provided in the neighborhood of both the gripping half units 31 and 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire gripper used for construction of electric wires and mounting of a protective tube to the electric wires.

[0002]

2. Description of the Related Art Conventionally, an electric wire gripper has a structure in which an electric wire is sandwiched and gripped by a pair of open / closeable half-pipe-shaped gripping halves. (For example, a hot stick) and the like are known. Also, when performing construction work in the vicinity, a hollow cylindrical electric wire protection pipe (so-called "poly pipe") is attached to the electric wire so that the electric wire is not damaged, and this protective tube is inserted smoothly into the electric wire ( Also, it is used to hold an insertion guide for removing the wire in a predetermined position of the electric wire.

FIG. 7 shows a conventional example of a wire gripper used for holding the insertion guide.
6 (a flexible guide 87 through which a protective tube is guided is attached to the insertion guide 86), and a fixed-side holding half 81, which is fixed to the fixed holding half 81 via a hinge 85. The movable holding portion half 82 is freely attached. These two halves 8
Cylindrical depressions 83, 8 are provided on the gripping surfaces facing each other.
4 are formed, and the movable-side gripping half 82 is moved to the position shown in FIG.
(B) Open as indicated by the dashed line, and then open both dents 83, 8
The electric wire D can be firmly gripped by holding the electric wire D between the four.

[0004]

However, in such a conventional wire gripping tool 80, both gripping halves 8 are used.
1, 82 is opened and closed by twisting a threaded opening / closing screw 88 (for this reason, a corresponding screw is also cut in the holding portion half 81). When gripping, the opening and closing screw 88 must be twisted dozens of times, which is troublesome. In addition, since this work is performed at a high place and close to the electric wire D, sufficient safety confirmation is required, and workability is not good. Furthermore, it is difficult to make the electric wire D just located between the depressions 83 and 84 of the both holding portion halves 81 and 82, and when the electric wire D is not properly gripped between the depressions 83 and 84, the electric wire D is In some cases, the protective tube was damaged, or the guiding direction was shifted when the protective tube was attached, and the protective tube could not be properly attached to the electric wire.

The present invention has been made in view of such a problem, and can easily perform an operation of gripping an electric wire.
It is an object of the present invention to provide a wire gripper having a configuration capable of improving work efficiency and improving safety.

[0006]

In order to achieve the above object, according to the present invention, the first and second electric wire gripping halves in which the gripping surfaces formed with semi-cylindrical depressions face each other are opened and closed. In an electric wire gripper for gripping and releasing an electric wire, a support rod is provided at one end to open and close both halves, and a link mechanism is provided at the other end of the support rod. Rod 22 and rocking member 2
0), and a locking mechanism (for example, a locking member provided with the claw portion 18a in the embodiment) for locking the lever while holding the electric wire by the two gripping halves. 18 and teeth 14 of the flat plate member 14
a) are provided. According to such a configuration, the electric wire can be easily gripped by remote control,
Since there is no need to manually open and close the two gripper halves by operating the screw as in the related art, it is possible to improve work efficiency and improve safety.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a right side view and a partial front view of an electric wire gripper 1 according to the present invention,
FIG. 3 is a view showing a state in which the protective tube insertion machine 40 provided with the electric wire gripping tool 1 is mounted on an aerial work vehicle 50 and the protective tube 70 is attached to the electric wire D. The aerial work vehicle 50 shown in FIG. 3 has a horizontally movable swivel table 52 behind a vehicle body 51. The swivel table 52 has a telescoping boom 53 which can be freely moved up and down by an up and down cylinder 54. It is attached to. At the tip of the boom 53, a column (not shown) which is always held vertically is provided, and a work table 55 for an operator's boarding is attached to the column so as to swing freely. Outrigger jacks 51a are provided at four front, rear, left, and right sides of the vehicle body 50. By extending the outrigger jacks 51a, it is possible to withstand the overturning moment when the boom 56 is extended.

[0008] A sub-boom 56 is provided at the upper end of the above-mentioned support column so as to be able to move up and down. An arm device 57 having a plurality of joints is attached to the sub-boom 56. Sheaves 58 and 59 are attached to an intermediate portion and a distal end portion of the arm device 57, respectively. The sheaves 58 and 59 are wound and fed out by a winch 60 provided at a base end portion of the sub-boom 56, and a protective tube 70 is stored at the distal end portion. The storage tube 62 supports the attached wire 61. Here, the protective tube 70 is formed of an insulating material having elasticity, and as shown in FIG. 4, a hollow cylindrical main body 71 and a slit formed to extend in the axial direction on the outer peripheral surface of the main body. A pair of flanges 72 extending outward from both ends. The inner diameter of the main body 71 is naturally larger than the outer diameter of the electric wire D to which the main body 71 is to be attached.

The protective tube insertion machine 40 includes a feeding portion 41 attached to an intermediate portion of an arm device 57, an electric wire gripper 1 for gripping the electric wire D, an insertion guide 42 fixed to the electric wire gripper 1, and It comprises a flexible guide 46 which can be bent and extended so as to connect the feeding portion 41 and the insertion guide 42. The feeding portion 41 is configured to rotate a plurality of rollers (not shown) by driving a built-in hydraulic motor (not shown), and the worker M uses a hand or an insulative magic hand 58. When mounted from below the feeding portion 41, the plurality of rollers are conveyed so as to sandwich the flange portion 72 of the protection tube 70, and vigorously eject upward.

As shown in FIGS. 1 and 2, the wire gripper 1 is made of an insulating material (for example, FRP) and has a vertically extending support bar 10 at the upper end thereof. Is attached, and this support bracket 11 is attached.
1 (left side of the paper in FIG. 1; front side of the paper in FIG. 2) extends in the left-right direction (vertical direction to the paper surface in FIG. 1, and left-right direction in FIG. 2). A unit 30 is provided.

A cylindrical bracket 12 is mounted in the vicinity of the center of the support rod 10. The bracket 12 passes through a groove 13 provided through the support rod 10 and the bracket 12 in the front-rear direction. A flat plate member 14 is attached. Saw-shaped teeth 14 a are provided on the rear side of the support bar 10 in the flat plate member 14, and the front side of the support bar 10 extends through the through groove 13 from the rear to the front. The arm 16 a of the lever 16 is swingably connected by a pin 17.

A lock member 18 is attached to a portion of the lever 16 on the rear side of the support rod 10 by a pin 19 so as to be swingable on the same plane as the flat plate member 14. The lock member 18 is urged in a counterclockwise direction in FIG. 1 (direction of arrow C in FIG. 1) by a coil spring (not shown), and a claw portion 18 a formed at the tip of the lock member 18 is It is constantly pressed in the direction of engagement with the teeth 14a. Therefore, the teeth 14a of the flat plate member 14 and the claw portions 18a of the lock member 18 have a configuration like a ratchet mechanism (claw wheel).
The lever 16 rotates clockwise around the pin 17 (arrow A in the figure).
When trying to swing in the direction of (), the claw portion 18a moves so as to slide on the teeth 14a and does not hinder the swing,
When the lever 16 is to swing in the counterclockwise direction around the pin 17 (in the direction of arrow B in the figure), the claw portion 18a is locked by the teeth 14a, so that the swing cannot be performed.

The center of a substantially L-shaped swinging member 20 is attached to the supporting bracket 11 by a pin 21 so as to be swingable. An elongated hole 20a is formed in one arm of the swinging member 20. The upper end of a vertically extending connecting rod 22 is attached to the side arm by a pin 23. This connecting rod 22
Is coupled to the lever 16 by a pin 24. When the lever 16 swings in the direction of arrow A in the figure, it moves downward to swing the swing member 20 around the pin 21.

The gripper 30 includes a fixed gripper half 31 fixed to the support fitting 11 and a shaft 35 extending through the fixed gripper half 31 and the support member 11 in the front-rear direction.
And a pin 36 provided at the rear end of the shaft 35 is engaged with the elongated hole 20 a formed in the swinging member 20. I have. A spring 37 is provided between the two gripper halves 31 and 32 so as to surround the outer periphery of the shaft 35, whereby the two gripper halves 31 and 32 are constantly urged in a direction of separating from each other. The movable-side gripper half 32 is a fixed-side gripper half 3
2, two guide shafts 38 extending in the front-rear direction and parallel to the shaft 35 (these two guide shafts 38 are arranged in the left-right direction, that is, in the direction parallel to the electric wire D, as shown in FIG. Thread (not shown) formed at the rear end of the guide shaft 38 and threadedly engaged with the nut 39 on the rear side of the fixed-side holding half 31. Therefore, the fixed-side holding portion half 31 and the movable-side holding portion half 32 are not urged in the separating direction by the spring 37 but do not spread beyond a certain interval. The two guide shafts 38 also serve to guide the fixed-side gripper half 31 and the movable-side gripper half 32 so as not to be in a twisted positional relationship.

Semi-cylindrical depressions 33a, 34a are formed in the opposite gripping surfaces 33, 34 of the fixed-side gripper half 31 and the movable-side gripper half 32.
The radii of a and a (the radius of the cylinder) are substantially equal to the radius of the electric wire D. Therefore, when the lever 16 is swung in the direction of arrow A in FIG. 1 while holding the lower end of the support rod 10, the swing member 20 swings around the pin 21 and the shaft 35 moves rightward, The gripper half 32 slides to the right against the urging force of the spring 37, so that the gripping surfaces 33 and 34 are close to each other and the electric wire D positioned between the recesses 33a and 34a is It is gripped by the partial halves 31, 32.

Here, the two guide shafts 38
When closing both grip part halves 31, 32, the electric wire D is in contact with the outer peripheral surface of the electric wire D while the electric wire D is in contact with the two concave portions 33a, 34a.
And serves to guide the electric wire D so as to be located at the position where the electric wire D is held. FIG. 5 shows this state, and FIG.
3B shows the state before the electric wire D is gripped by the two gripper half bodies 31 and 32, and FIG. 2B shows the state after the electric wire D is gripped by the two gripper half bodies 31 and 32, respectively. In order for the electric wire D to be sandwiched between the recesses 33a and 34a in this manner, as shown in FIG. 6, a surface F including the central axes P and Q of the recesses 33a and 34a and an outer peripheral surface of the guide shaft 38. The two guide shafts 38 may be provided so that the distance between the two guide shafts 38 substantially matches the radius R of the electric wire D.

By swinging the lever 16 in the direction of arrow A while holding the lower end of the support rod 10 in this manner, the movable-side grip half 32 approaches the fixed-side grip half 31. In this case, the electric wire D can be gripped, but at this time, the lever 16 moves the lock member 18 downward as it swings in the direction of the arrow A. At this time, the claw portion 18a of the lock member 18 swings around the pin 19 while the flat plate member 14
Is moved so as to slide on the tooth 14a. Then, when only the lever 16 is released from the hand in a state where the electric wire D is gripped, the two gripping halves are separated by the restoring force of the spring 37 provided between the fixed gripping half half 31 and the movable gripping half half 32. The bodies 31 and 32 try to separate from each other, and this force is transmitted to the shaft 35, the swinging member 20, and the connecting rod 22 to move the lever 16 to the arrow B in the figure.
However, since the claw portion 18a of the lock member 18 meshes with the teeth 14a of the flat plate member 14, the lever 16 cannot be swung around the pin 17 and is locked. Therefore, the two holding portion halves 31, 32 are held in a state of being close to each other.

On the other hand, to release the gripping state of the electric wire D,
The operating portion 18b of the lock member 18 is pushed in the clockwise direction (the direction of the arrow D in the drawing) while the lever 16 is once slightly swung in the direction of the arrow A. As a result, the claws 18a and the teeth 14
As a result, the lever 16 swings in the direction of arrow B in FIG. As a result, the two holding portion halves 31, 32 are separated from each other, and the holding of the electric wire D is released (released).

As shown in FIGS. 1 and 2, the insertion guide 42 has a base 43 connected to the fixed-side holding half 31 of the electric wire holding tool 1, a front end 44 extending in a flat plate shape, and this front end. And a cylindrical connecting portion 45 connected thereto. here,
The distal end portion 44 and the connecting portion 45 are attached to the base 43 so as to extend obliquely with respect to the electric wire D gripped by the electric wire gripping tool 1. As shown in FIG. 2, mounting holes 43a and 45a opened to the right are formed in the base 43 and the connecting portion 45, and the holes 43a and 45a are formed at the ends of the flexible guide 46 as shown in FIG. Is detachably attached.

Next, a procedure for attaching the protection pipe 70 to the electric wire D using the protection pipe insertion machine 40 will be described. For this purpose, the aerial vehicle 50 is first driven to move to the work site, the vehicle body 50 is stopped, and then the jack 51a is extended as shown in FIG. Subsequently, the worker M gets on the work table 55, performs up / down, expansion / contraction, turning operation of the boom 53, and swing operation of the work table 55 from an operation box (not shown) installed on the work table 55, thereby performing the work table 55. To the vicinity of the electric wire D. When the position of the work table 55 is determined, the worker M attaches the arm device 57 to the sub-boom 56, suspends the storage tube 62 in which the protection tube 70 is stored by the winch 60, and pulls out the feeding portion 41 of the protection tube insertion machine 40. Attach it to the arm device 57.

After these operations are completed, the insertion guide 4
2, the lower end of the support rod 10 in the electric wire gripper 1 having one end of the flexible guide 46 attached thereto is held by hand, and the electric wire gripper 1 is positioned so that the electric wire D is positioned between the two gripper halves 31 and 32. Move. When the electric wire D is brought into contact with the two guide shafts 38 as shown in FIG. 5A, the operation of swinging the lever 16 in the direction of arrow A in FIG. Is moved toward the fixed-side holding portion half 31, and the electric wire D is held by both holding portion halves 31 and 32. At this time, the electric wire D is guided by the guide shaft 38, and the concave portions 3 of the two gripper halves 31, 32 are surely formed.
3a and 34a. When the electric wire D is gripped by the two gripper halves 31, 32, only the lever 16 is released from the hand. At this time, since the lever 16 is locked by the lock member 18 as described above,
The grip of the electric wire D by the first and the second 32 is held.

When the electric wire D is gripped by the electric wire gripper 1, the other end of the flexible guide 46 is attached to the feeding portion 41. As a result, the feeding portion 41 is connected to the flexible guide 46.
And the state is connected to the electric wire D via the insertion guide 42. When such preparation is completed, the protection pipe 70 is attached to the electric wire D. To this end, the worker M attaches the protective tube 70 from the lower part of the feeding section 41 using the hand or the magic hand 58 as described above. As a result, the feeding section 41 is connected to the protective pipe 70.
To the top. The protection tube 70 fed out by the feeding portion 41 is guided by the flexible guide 46 to the insertion guide 42 as shown in FIG. 4, where the flange 72 of the slit provided in the longitudinal direction of the protection tube 70 is expanded. To the wire D.

According to such a procedure, the protective tube 70 is connected to the electric wire D.
The protective tube insertion machine 40 includes the wire gripper 1 according to the present invention, and the wire gripper 1 has, as described above, one of the two holding portion halves 31, 32, which is provided at the other end of the support rod 10 so as to be able to open and close freely.
And a locking mechanism (claw) that locks the lever 16 while the electric wire D is being gripped by the gripping half halves 31, 32 via the swinging member 20). Since the lock member 18 having the portion 18a and the teeth 14a) of the flat plate member 14 are provided, the electric wire D can be easily gripped by remote control, and
It is no longer necessary to manually open and close the two gripper halves by operating the screw as in the related art, and it is possible to improve work efficiency and improve safety.

Further, when the electric wire gripping tool 1 closes the gripping half halves 31 and 32, the electric wire D is brought into contact with the outer peripheral surface of the electric wire D and at a position where the electric wire D is sandwiched between the concave portions 33a and 34a. Since the guide shaft 38 for guiding the electric wire D so as to be positioned is provided, the electric wire D can be easily and reliably sandwiched between the recesses 33a and 34a. Since the electric wire is not damaged by being gripped by the portion and there is no possibility that the protective tube 70 is guided in an incorrect direction, the protective tube 70 can be securely attached to the electric wire D. This also improves work efficiency and safety.

Although the embodiment of the wire gripper according to the present invention has been described above, the scope of the present invention is not limited to the above. For example, the two guide shafts 38 in the above embodiment abut on the outer periphery of the electric wire D, and when the two grip half halves 31 and 32 are closed, the electric wire D becomes
Since the wire D is for guiding the electric wire D so as to be located at the position sandwiched by the wires a and 34a, the number of wires is not limited to two and may be any number of one or more. Alternatively, instead of such a shaft, a plate member extending in the axial direction of the electric wire D may be provided to position the electric wire D. In the above embodiment, the mechanism for locking the lever 16 is similar to the ratchet mechanism using the lock member 18 having the claw portion 18a and the teeth 14a of the flat plate 14. Other mechanisms may be used as long as the lever 16 can be locked while holding the electric wire D.

Further, in the above embodiment, the case where the electric wire gripper according to the present invention constitutes a part of the protective pipe insertion machine has been described as an example. The present invention is not limited to those used as a part, and can be used for all other uses performed by holding an electric wire. For this reason, for example, it is also possible to separate the insertion guide from the electric wire gripping tool and use it as a hot stick. Even in such a case, the above effects can be obtained. When the electric wire gripping tool is used as a hot stick in this way, it is preferable to use a shorter support rod for direct hot-line work and a longer support rod for indirect hot-line work.

[0027]

As described above, in the electric wire gripping tool according to the present invention, the support rod is provided at one end to open and close the two gripping halves, and is provided at the other end of the support rod.
A lever that opens and closes both gripping halves via a link mechanism and a lock mechanism that locks the lever while holding the wire by both gripping halves are provided, so that the electric wire can be easily operated by remote control. Can be grasped,
It is no longer necessary to manually open and close the two gripper halves by operating the screw as in the related art, and it is possible to improve work efficiency and improve safety.

[Brief description of the drawings]

FIG. 1 is a right side view of an electric wire gripper according to the present invention.

FIG. 2 is a partial front view of the electric wire gripper.

FIG. 3 is a diagram showing a state in which a protective tube insertion machine provided with the electric wire gripper is mounted on an aerial work vehicle and a work for attaching a protective tube to electric wires is performed.

FIG. 4 is a perspective view showing a state in which a protective tube is attached to an electric wire.

5A and 5B are diagrams showing a state in which an electric wire is guided between both recesses by a guide shaft, wherein FIG. 5A shows a state before the electric wire is gripped by both gripper halves, and FIG. 5B shows both gripper halves. , Respectively, after the electric wire is gripped.

FIG. 6 is a partial right side view of the electric wire gripper illustrating a mounting position of the guide shaft.

FIG. 7 is a view showing an example of a conventional electric wire gripper, wherein (A) is a front view and (B) is a right side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric wire gripping tool 10 Support rod 14 Flat member 14a Teeth 16 Lever 18 Lock member (Lock mechanism) 18a Claw part 20 Swinging member (Link mechanism) 22 Connecting rod (Link mechanism) 30 Gripping part 31 Fixed gripping half ( First half of the electric wire gripping part) 32 Half of the movable side gripping part (half of the second electric wire gripping part) 33, 34 Gripping surface 33a, 34a Indentation 38 Guide shaft (guide member) D Electric wire

Claims (1)

[Claims] An electric wire gripper for gripping and releasing an electric wire by opening and closing first and second electric wire gripping halves each having a semicylindrical hollow formed with opposing gripping surfaces. A support rod that supports the two gripper halves in an openable and closable manner; a lever that is provided at the other end of the support rod and that opens and closes the two gripper halves via a link mechanism; An electric wire gripper, comprising: a lock mechanism for locking the lever while the electric wire is gripped by the half body.