JPH0337383B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a detention clamp for use in securing conductors of support structures, particularly power distribution lines.

[Conventional technology]

Conventional detention clamps are designed on the premise that attachment and removal of detention clamps to conductors will be carried out under power outages, such as when replacing or adding a detention insulator interposed between a support structure and a detention clamp. It was configured to do this.

[Problem that the invention seeks to solve]

Therefore, it is extremely dangerous to attach or detach the retaining clamp to or from the conductor while the line is live. Conventionally, work has been carried out under power outages, resulting in lower reliability of power supply and inability to improve maintenance efficiency.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a live wire tie clamp that enables attachment and detachment of the tie clamp to a conductor using a live wire stay with a tool attached to the tip.

[Means for solving problems]

In order to achieve this object, the configuration of the present invention will be explained using the drawings.

The live wire detention clamp according to the present invention includes a clamp body 2 having a conductor guide groove 1 formed on its upper surface, and a U-shaped metal fitting 3 that is inserted into the clamp body 2 from below. A presser foot 6 is rotatably attached to a presser foot 5 formed with a conductor presser groove 4 facing the conductor, and a locking pin 22 for attaching and detaching the presser foot 5 to and from the other side of the U-shaped metal fitting 3 is inserted and removed. Presser foot attachment/detachment means 7, U-shaped fitting attachment means 8 for attaching the U-shaped fitting 3 to the clamp body 2, and displacement by operating the screw shaft 6 for causing relative displacement between the clamp body 2 and the U-shaped fitting 3. It consists of means 10.

[Operation] To remove the tie clamp from the tensioned conductor, first use a kamalong, wire tensioner, etc. to bring the tensioned conductor into the support structure side to the extent that the tension insulator does not loosen, and then remove the live wire stay. The clamping of the conductor is released by rotating the screw shaft 9 using a tool at the tip of the stake and widening the distance between the clamp body 2 and the presser foot 5. This transfers the conductor tension to the wire tensioner. Next, the tool at the tip of the stake is replaced, and this tool is used to pull out the locking pin 22 of the presser foot attachment/detachment means 7 from the U-shaped metal fitting 3, open the presser foot 5, and remove the retaining clamp from the conductor.

To fix the retaining clamp to the conductor, determine the slackness in advance with a wire tensioner, fit the conductor guide groove 1 into the conductor clamp position, and place the presser foot 5 over the clamp body 1 and the square bracket 3 with a live wire stay. , the presser foot 5 is attached to the U-shaped fitting 3 by the locking pin 22 of the presser foot attachment/detachment means 7.
to be locked. As a result, the presser foot 5 and the U-shaped metal fitting 3 are integrated, the conductor holding groove 4 of the presser foot 5 is fitted into the conductor, and the retaining clamp is attached to the conductor. Here, the tool at the tip of the stake is replaced, the screw shaft 9 is rotated, and the clamp body 2 is pushed up until a predetermined conductor clamping force is obtained, thereby fixing the retaining clamp to the conductor.

〔Example〕

Embodiments of the present invention will be described based on the drawings. 1st
2 and 3, the clamp body 2
has a mounting hole 14 at the bottom of the tip for attaching the Kamalong, and a mounting hole 15 at the rear end for attaching the connecting fitting on the support structure side, and the jumper side faces downward on the upper surface from the tip to the middle. The conductor guide groove 1 is provided with an independent guide groove part 16 at the rear upper part thereof that guides the jumper side of the conductor upward, and is further provided with an independent guide groove part 16 at the middle lower side of the clamp body 2 slightly downward toward the tip. A long hole 17 is formed.

The presser metal fitting 6 consists of a U-shaped metal fitting 3 that is fitted into the clamp body 2 from below, and a presser foot 5 that is rotatably attached to the upper part of one side wall of the U-shaped metal fitting 3 by a support shaft 18. The U-shaped metal fitting 3 has a threaded shaft 9 inserted into the lower part of both side walls and the elongated hole 17 of the clamp body 2.
It is attached to the clamp body 2. The presser foot 5 has a spring 21 and a locking pin 2 on the inner surface of its free end.
A locking pin 22 is formed on the outer side of the free end to fit into the locking hole 20 formed in the upper side wall of the U-shaped metal fitting 3. , and the locking pin 22
A seat ring 23 is arranged to accommodate the spring 21 in the recess 39 against the spring 21. That is, the presser foot attachment/detachment means 7 of this embodiment forms a closed loop with the U-shaped metal fitting 3 and the presser foot 5 by fitting the locking pin 22 into the locking hole 20 of the U-shaped metal fitting 5 as shown in the figure. To release, use the tool at the end of the live wire stay to seat ring 2.
3 to remove the locking pin 22 from the locking hole 20 against the spring 21.

In this embodiment, the displacement means for displacing the clamp body 2 that clamps the conductor with the presser foot 5 is formed in the middle of the hexagonal head screw shaft 9 that is screwed into the screw hole 19 of the U-shaped metal fitting 3 by means of a threaded portion 24. The tapered part 25 contacts the elongated hole 17 of the clamp body 2, and when the screw shaft 9 is tightened as shown in the figure, the clamp body 2 is located at the uppermost position, and when the screw shaft 9 is loosened, the taper As the portion 25 moves to the left in the figure, the clamp body 2 will descend under its own weight, and conversely will rise as it is tightened. This screw shaft 9 operation is performed by
Since it is perpendicular to the clamp body 2, the conductor acts as a reaction force during tightening, allowing for strong tightening.

The elongated hole 17 is inclined with respect to the conductor guide groove 1 because the conductor clamped by the presser metal fitting 6 of the clamp body 2 is pulled into the clamp body 2 by the conductor tension force.
This is so that when the conductor is about to be pulled out, the presser metal fitting 6 that moves together with the conductor is pushed down toward the clamp body 2 side by the screw shaft 9 along the elongated hole 17.
As a result, a conductor clamping force commensurate with the conductor tensioning force can be obtained. Furthermore, in this embodiment, the U-shaped fitting mounting means is composed of a screw shaft 9 to be attached to the U-shaped fitting 3 and a long hole 17 in the clamp body 2.

In the embodiments shown in FIGS. 4, 5 and 6, the clamp body 2 does not have the elongated hole 17 as shown in FIG. For this reason, as a means for attaching the U-shaped metal fitting 3 to the clamp body 2, long grooves 26 are formed in both side walls of the clamp body 2, each facing slightly downward toward the tip, and these long grooves 26, 26 are attached to both side walls of the U-shaped metal fitting 3. The U-shaped metal fitting 3 is attached to the clamp body 2 through the pins 27, 27 attached to the clamp body 2, respectively. Further, as a means for displacing the clamp body 2 by the screw shaft 9, the screw shaft 9 is rotatably attached to the side of the U-shaped metal fitting 3, and its movement in the axial direction is restrained by the hexagonal head 28 and the stepped portion 29. Then, the block 31 is screwed onto the threaded portion 30. The lower surface of this block 31 contacts the bottom surface of the recess 32 of the U-shaped metal fitting 3, and the upper surface contacts the lower surface of the clamp body 2. The contact surface 33 between the block 31 and the clamp body 2 is a slope inclined in the axial direction of the screw shaft 9, and when the screw shaft 9 is rotated, the block 31 moves in the axial direction, and the clamp body 2 in contact with it is displaced in the vertical direction. The other configurations are the same as those shown in FIG.

FIG. 7 shows another embodiment of the means for displacing the clamp body 2 by means of the screw shaft 9. As shown in FIG. A pair of screw-hole blocks 34 and 35 with sloped upper surfaces are placed opposite each other at the bottom of the U-shaped metal fitting 3, and the lower surface of the clamp body 2 serves as a V-shaped guide surface. Place it on the slope. On the other hand, the screw shaft 9
has a right-hand thread 36 and a left-hand thread 37, the right-hand thread 36 is screwed into the block 34, and the left-hand thread 37 is screwed into the block 34.
5 are screwed together, and when the screw shaft 9 is rotated, both blocks 34 and 35 approach or separate, so that the clamp body 2 is displaced in the vertical direction.

It should be noted that the live wire restraining clamp according to the present invention is not restricted to the embodiments illustrated, and can be modified in various ways without departing from the gist thereof.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the presser foot can be opened and closed with respect to the clamp body, the presser foot can be attached and removed from the U-shaped metal fitting, and the distance between the presser foot and the pair of clamp bodies can be adjusted by operating the live wire stay. Therefore, it is possible to attach and detach the retaining clamp to and from the conductor while the line is live. Therefore, it is possible to improve the reliability of power supply and to improve the efficiency of maintenance.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along line A-A in Fig. 1, and Fig. 4 is a side view of another embodiment of the invention. , 5th
6 is a sectional view taken along line BB in FIG. 4, and FIG. 7 is a partially cutaway sectional view of another embodiment of the present invention. 1... Conductor guide groove, 2... Clamp body, 3...
... U-shaped metal fitting, 4 ... Conductor presser, 5 ... Presser foot,
6... Presser foot fitting, 7... Presser foot attachment/detachment means, 8...
U-shaped bracket mounting means, 9... screw shaft, 10... displacement means.

Claims (1)

[Claims] 1. A clamp body having a conductor guide groove formed on the upper surface, and a presser foot having a conductor holding groove opposed to the conductor guide groove formed in the upper part of one side wall of a U-shaped metal fitting that is inserted into the clamp body from below, can be rotated. a presser foot fitting attached to the clamp body; a presser foot attaching/detaching means by inserting and removing a pin for attaching and detaching the presser foot to the other side wall of the U-shaped fitting; and a U-shaped fitting for attaching the U-shaped fitting to the clamp body. 1. A live wire detention clamp comprising: a mounting means; and a displacement means by operating a screw shaft for causing relative displacement between the clamp body and the U-shaped metal fitting.