JPH07231545A - Wedge anchor clamp - Google Patents

Abstract

PURPOSE:To enhance the workability by providing an engaging piece for allowing or regulating the rotation of a stopper accompanied with the rotation of a tightening bolt at a wedge part thereby making it possible to set or remove the stopper by simply rotating the tightening bolt. CONSTITUTION:When a screw is driven into a screw hole through a tightening bolt 11 driven into a through hole 10 through a washer W, a stopper 8 is shifted toward a flange part 7. When the bolt 11 is untightened, the stopper 8 is shifted to separated from the flange part 7 through the function of a coil spring 16. When the bolt 11 is tightened to secure a wire L by means of the stopper 8, rotation of the stopper 8 is blocked by an engaging piece 15 and the stopper 8 is positioned to secure the wire L in place. When the bolt 11 is untightened and the stopper 8 is rotated in the direction separating from the flange part 7, the stopper 8 is rotated together and strikes against the engaging piece 15 to be stopped thereat. Under that state, the stopper 8 releases a groove thus allowing the setting and removing of the wire L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wedge-type retractable clamp, and more particularly to a wedge-type retractable clamp that enables efficient work during hot line.

[0002]

2. Description of the Related Art FIG.
2 shows a conventional wedge type strain clamp (hereinafter referred to as a clamp) C'as shown in Japanese Patent Laid-Open No.
The clamp C'is composed of a clamp body 1 and a wedge body 2. The figure (a) is a front view of the clamp C ', and the figure (b) is the arrow line arrow in the figure (a). It is a perspective view.

The clamp body 1 has a clamp portion 21 and a wedge portion 22, and an electric wire L is held between the clamp portion 21 and the wedge portion 22, and the electric wire L is fixed to the clamp body C'by a wedge mechanism. I am trying to do it. The pin 2 is provided on the side of the clamp portion 21 opposite to the side where the electric wire L is stretched.
3 is provided with a connection fitting 24 that is rotatably provided, and is configured to be connected to an electric pole via this connection fitting 24 and an insulator (not shown).

On the upper surface of the wedge body 22 on the side opposite to the side where it is inserted into the clamp body 1, the wedge body 22 is projected toward both sides in a direction orthogonal to the direction of the center line of the concave line 25 provided in the wedge body 22, In addition, a pair of flange portions 26a, 26b having the same surface as the surface of the concave line 25 are provided. Further, on the upper surfaces of the flange portions 26a and 26b, a holding piece 27 for fixing the remaining electric wire L held by the clamp body 21 to the wedge body 22 is provided.

One end of the pressing piece 27 and the one brim portion 26a are connected by a hinge mechanism 28.
An upper portion of a tightening bolt 29 is rotatably connected to the other end of the pressing piece 27, and the tightening bolt 2
9 is inserted into a notch provided in the other brim portion 26,
It is configured to be fixed with a nut 30. Therefore, the electric wire L is put in the groove 25, and the pressing piece 27 is pressed from above.
When the nut 30 is tightened with the
It can be fixed to the wedge body 22 by 7.

[0006]

However, in the above-mentioned conventional clamp C ', when fixing the electric wire L to the wedge body 22, the tightening bolt 29 is loosened and the pressing piece 27 is recessed 25.
After removing from the top and inserting the electric wire L into the recess 25, the pressing piece 27 is placed on the electric wire L, and then the tightening bolt 2
Since the nut 30 is tightened after setting 9, the work is complicated. Especially, the electric wire L
During the hot-line work when a current is flowing through, the tightening bolt 29, the nut 30 or the pressing piece 27 cannot be directly touched by hand, and it is a work using an insulating tool. It was difficult.

Therefore, the present invention has been made to solve the above-mentioned drawbacks, and an object thereof is to make it possible to automatically remove and set the pressing piece only by rotating the tightening bolt. , To provide a clamp that can improve workability.

[0008]

In order to achieve the above-mentioned object, a clamp according to the present invention is a wedge type retractable clamp in which an electric wire is interposed between a wedge body and a clamp body to insert the electric wire. By the collar portion provided on one side in the direction orthogonal to the center line of the concave line of the wedge body, the screw hole provided in the collar portion, and the collar portion mounted on the collar portion, A holding piece for fixing the electric wire, a through hole provided in the holding piece facing the screw hole, and a tightening bolt for inserting the holding piece to the collar portion by inserting the holding piece from above the through hole. , A coil spring that is provided between the collar portion and the pressing piece and constantly biases the pressing piece in a direction separating from the collar portion, and when the tightening bolt is rotated in a loosening direction, The wire is placed on the wedge so that Provided on the collar portion that allows rotation of the holding piece and restricts rotation of the holding piece at a position facing the electric wire position on the wedge body when the tightening bolt rotates in the tightening direction. And a locking piece that is provided.

[0009]

In the above structure, when the locking piece is rotated in the direction in which the tightening bolt is loosened, the locking piece is allowed to rotate so as to be disengaged from the electric wire position on the wedge body, and the tightening bolt is tightened. The rotation of the pressing piece is regulated at a position facing the electric wire position on the wedge body when the pressing piece is rotated in the predetermined direction.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A clamp according to an embodiment of the present invention will be described below with reference to the drawings. 1A is a front view of a clamp C according to an embodiment, FIG. 1B is a view taken along the line AA of FIG. 1A, and FIG. 1C is a view of FIG. 1B. It is a BB line sectional view.

The clamp body 1 is composed of a single rod-shaped body, and one end side of the clamp body 1 is configured to be attached to an electric pole through an insulator (not shown) or the like. A groove 3 into which the lower part of the wedge body 2 is movably inserted is provided in the central portion of the upper surface of the clamp body 1 in the longitudinal direction.

A clamp piece 5 is provided on the other end side of the clamp body 1.
Is provided, and the clamp piece 5 is provided with a concave strip 4 for receiving the electric wire L so as to face the groove strip 3. The clamp piece 5 is provided so that the center line passing through the longitudinal direction of the concave line 4 and the center line passing through the longitudinal direction of the groove line 3 intersect at the other end side of the clamp body 1. Further, one side surface side (front side in FIG. 1) of the clamp piece 5 is open so that the electric wire L can be inserted between the clamp piece 5 and the wedge body 2 set in the groove 3. ing.

As described above, the wedge body 2 is constructed so that the lower portion thereof can be movably inserted into the groove 3 of the clamp body 1. Then, on the upper surface of the wedge body 2,
A similar groove 6 is provided so as to face the groove 4 of the clamp piece 5. Further, the center line passing through the longitudinal direction of the recessed line 6 of the wedge body 2 and the center line passing through the lower longitudinal direction intersect with each other, that is, the upper surface thereof is inclined, and the intersecting angle is the clamp piece. 5 is formed to have a substantially equal intersection angle between the center line passing through the longitudinal direction of the groove 4 and the center line passing through the longitudinal direction of the groove 3.

Therefore, when the wedge body 2 moves on the groove strip 3 toward the clamp piece 5, the distance between the recessed strip 4 of the clamp piece 5 and the recessed strip 6 of the wedge body 2 becomes gradually smaller, and both recessed strips 4 are formed. The clamping force acts on the electric wire L existing between the first and the second terminals.

At one end of the upper surface of the wedge body 2 opposite to the clamp piece 5 side, one end of the wedge body 2 is projected in one direction orthogonal to the direction of the center line of the groove 6 provided in the wedge body 2, and A collar portion 7 having the same surface as the surface of the recessed line 6 is provided. Further, on the upper surface of the collar portion 7, there is provided a holding piece 8 for fixing the remaining electric wire L held by the clamp body 1 to the wedge body 2.

A through hole 10 is provided in a substantially central portion of the pressing piece 8, and a tightening bolt 11 having a washer W interposed therein can be inserted into the through hole 10. And, in the collar portion 7 facing the through hole 10,
A screw hole 12 corresponding to the tightening bolt 11 is provided.

The locking piece 15 is made of a rod-shaped body and has a screw hole 12
It is provided integrally with the brim portion 7 so as to extend upward from the right end portion of the brim portion 7 on the side opposite to the concave streak portion 6 (see FIGS. 1A and 1B). The height of the locking piece 15 is determined such that it is at the upper surface position of the pressing piece 8 with a sufficient space between the pressing piece 8 and the collar portion 7 for the electric wire L to enter. Also, the tightening bolt 11
Has a length determined so as not to deviate from the screw hole 12 in this state.

The pressing piece 8 is mounted on the brim portion 7 as in the conventional example shown in FIG. 3, but the brim portion 7 and the pressing piece 8 are not connected by a hinge mechanism, and thus are in a free state. It is provided.

The coil spring 16 is provided around the tightening bolt 11 and between the pressing piece 8 and the collar portion 7.
The pressing piece 8 is always urged in the direction of separating from the brim portion 7.

Therefore, when the tightening bolt 11 with the washer W interposed in the through hole 10 is screwed into the screw hole 12a, the pressing piece 8 moves toward the flange portion 7 side against the coil spring 21 and is also tightened. When the tightening of the attached bolt 11 is released, the pressing piece 8 can be moved in the direction away from the flange portion 7 side by the action of the coil spring 16.

When the tightening bolt 11 rotates as described above, the pressing piece 8 is always biased by the coil spring 16, so that the pressing piece 8 can be rotated together. That is, FIG.
As shown by the arrow in (b), when the tightening bolt 11 is rotated so as to fix the electric wire L with the pressing piece 8, the pressing piece 8
Also, the rotational force indicated by the arrow acts. However, the pressing piece 8 is positioned at a predetermined position where the electric wire L is fixed because the rotation force is blocked by the locking piece 15.

On the other hand, as shown by the arrow in FIG.
When the tightening bolt 11 is loosened and the pressing piece 8 is rotated in a direction away from the brim portion 7, the pressing piece 8 rotates in the direction indicated by the arrow and comes into contact with the locking piece 15 and stops. In this state, the pressing piece 8 releases the concave strip 6, so that the electric wire L can be put in and taken out.

As described above, in the clamp according to this embodiment, only by rotating the tightening bolt 11, the pressing piece 8 automatically releases the groove 6 and is set on the groove 6. Therefore, the action during activation can be facilitated.

The clamping of the electric wire L between the clamp body 1 and the wedge body 2 of the clamp C according to the present embodiment is the same as that of the above-mentioned conventional one, and therefore its explanation is omitted.

In the above embodiment, the locking piece 15 is provided with the brim portion 7.
Although it is provided on the right side of FIG. 1, it may be provided at a position (see 15 ') shown by a chain line in FIG. That is,
This locking piece 15 ′ is provided on the left side of the flange portion 7 between the screw hole 12 and the recessed line 6.

[0026]

The clamp according to the present invention has a collar portion provided on one side in a direction orthogonal to the center line of the recess of the wedge body into which the electric wire is inserted, and a screw hole provided in the collar portion. , A pressing piece that is placed on the collar portion and that fixes the electric wire with the collar portion, a through hole provided in the pressing piece facing the screw hole, and inserted from above the through hole. And a tightening bolt for fixing the pressing piece to the collar portion, and a coil spring that is provided between the collar portion and the pressing piece and constantly urges the pressing piece in a direction away from the collar portion,
When the tightening bolt is rotated in the loosening direction, the pressing piece is allowed to rotate so as to be disengaged from the electric wire position on the wedge body, and when the tightening bolt is rotated in the tightening direction, Since there is a locking piece provided on the collar portion that restricts the rotation of the pressing piece at a position facing the electric wire position on the wedge body, the pressing piece is automatically moved only by moving the tightening bolt. Since it can be rotated to, it is possible to particularly facilitate the work during hot line. That is, the electric wire can be released from the wedge body by simply loosening the tightening bolt, and the electric wire can be released from the wedge body, and the electric wire can be fixed by the pressing piece only by screwing the tightening bolt.

[Brief description of drawings]

1A and 1B show a clamp according to an embodiment of the present invention, in which FIG. 1A is a front view in which a part of the clamp is cut away, and FIG. 1B is a view A in FIG. -A line arrow view, the same figure (c) is the BB sectional drawing of the same figure (b).

FIG. 2 is a view corresponding to FIG. 1B and is an explanatory diagram when a tightening bolt is loosened.

3A and 3B show a conventional clamp, in which FIG. 3A is a front view in which a part is cut away, and FIG.
Is a view taken along the line EE of FIG.

[Explanation of symbols]

 1 Clamping body 3 Grooves 4, 6 Recesses 7 Collar 7 Collar 10 Through hole 11 Tightening bolt 12 Screw hole 15 Locking piece 16 Coil spring 22 Wedge body 27 Holding piece L Electric wire C Wedge type retention clamp (clamp)

Claims (1)

[Claims] 1. A wedge type retracting clamp in which an electric wire is interposed between a wedge body and a clamp body, and the wedge type retracting clamp is provided on one side in a direction orthogonal to a center line of a concave line of the wedge body into which the electric wire is inserted. Collar part, a screw hole provided in the collar part, a holding piece that is placed on the collar part and fixes the electric wire with the collar part, and the pressing piece facing the screw hole. A through hole provided in the through hole, a tightening bolt that is inserted from above the through hole to fix the pressing piece to the brim portion, and provided between the brim portion and the pressing piece A coil spring for urging the piece in a direction away from the brim, and a rotation of the pressing piece so as to separate from a wire position on the wedge body when the tightening bolt is rotated in a direction to be loosened. , Rotate in the direction that the tightening bolt is tightened Occasionally, restricting the rotation of the pressing piece at a position facing the wire position on the wedge, the wedge-type anchor clamp and having a a locking piece provided on the flange portion.