JPH0974653A - Wire clamp and method for attaching the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire clamp which can be attached to a wire in a short time. SOLUTION: In a wire clamp composed of a clamp main body 13 which is attached to a wire and a clamp cap 15 clamped to the main body 13 by utilizing the compressional repulsive force V of an elastic body 25, the elastic body 25 is caused to generate the compressional repulsive force by moving upward a clamping member 80 fitted to the outer peripheral surface of a clamping rod 23 passed through the main body 13 and cap 15 in a vertically movable state and putting the member 80 in a groove 85.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire clamp constructed so that a clamp body for holding an electric wire and a clamp cap are tightened by utilizing a compression repulsive force of an elastic body, and a method of mounting the same.

[0002]

2. Description of the Related Art In general, a spacer, a twist prevention damper, an interphase spacer, and the like are attached to an overhead electric wire (an overhead transmission line, an overhead ground wire, etc.) by an electric wire clamp. There are various types of electric wire clamps. Among them, there is an electric wire clamp configured to tighten the clamp body and the clamp cap by utilizing the compression repulsive force of an elastic body.

An example of such a wire clamp is shown in FIG.
It will be described with reference to FIGS. That is, the electric wire clamp includes the clamp body 13 for holding the electric wire 11 and the clamp cap 15. As shown in FIG. 13, the clamp body 13 and the clamp cap 15 are openably and closably coupled to each other by a hinge portion 20 on one side of the wire gripping grooves 17 and 19, and are composed of a tightening rod 23, a coil spring 25, an eccentric cam 27 and the like on the opposite side. Tightening mechanism 21
Is tightened.

The tightening rod 23 of the tightening mechanism 21 penetrates the clamp body 13 and has a T-shaped engaging portion 29 (FIG. 1) which engages with the open end side of the clamp cap 15 at one end thereof.
4 and FIG. 15), and the eccentric cam 27 is rotatably attached to the other end by a shaft pin 31. In addition, the eccentric cam 27 and the clamp body 1 are provided together with the washer 33 and the tightening rod 23 in the coil spring 25.
It is located between the three.

On the open end side of the clamp cap 15, the T-shaped engaging portion 29 of the tightening rod 23 is provided with a notch (or a long hole) 35 through which the T-shaped engaging portion 29 of the tightening rod 23 can pass when it is oriented in a direction perpendicular to the electric wire, and is directed in a direction parallel to the electric wire 11. A stopper wall 37 is formed so as to be hooked with. That is, the clamp cap 15
The T-shaped engaging portion 29 of the tightening rod 23 can be opened and closed by directing the T-shaped engaging portion 29 in a direction perpendicular to the electric wire 11. When the tightening rod 23 is rotated 90 ° in a closed state, the T-shaped engaging portion 29 is attached to the stopper wall 37. They are caught and do not rotate any further.

Further, the eccentric cam 27 rotates about the shaft pin 31 and can be in a state where the coil spring 25 is compressed as shown in FIG. 14 or a state where the coil spring 25 is not compressed as shown in FIG. The eccentric cam 27 is U-shaped as shown in FIG. 12, and the bent portion thereof has a hole 41 for rotation operation.
Are formed.

Next, a procedure for gripping an electric wire with this electric wire clamp will be described. First, as shown in FIG. 15, the eccentric cam 27 is set in a state in which the coil spring 25 is not compressed, the tightening rod 23 is rotated, the T-shaped engaging portion 29 is directed in the same direction as the elongated hole 35, and the clamp cap 15 is opened. Next, the electric wire 11 is inserted between the clamp body 13 and the clamp cap 15,
After closing the clamp cap 15, the tightening rod 23 is rotated by 90 ° to engage the T-shaped engaging portion 29 with the clamp cap 15.

Next, as shown in FIG. 15, the operating rod 43 is inserted into the hole 41 of the eccentric cam 27 and rotated by 180 ° in the direction of arrow P. Then, as shown in FIGS. 13 and 14, the eccentric cam 27 compresses the coil spring 25, so that the repulsive force clamps the clamp body 13 and the clamp cap 15 to firmly grip the electric wire 11.

The above-mentioned operation of tightening the clamp body and the clamp cap to firmly grip the electric wire 11 is performed by a person riding on a floating device suspended on the electric wire and moving on the electric wire, moving on the electric wire, and Is stopped by operating the eccentric cam at that position.

[0010]

However, there is a problem that the work of attaching the electric wire clamp is poor because the work is performed on an unstable electric wire. Also, the number of wire clamps attached to one power transmission line is very large, especially the spacers used for multi-conductor power transmission lines with 4 conductors or more,
Since one spacer has four or more electric wire clamps equal to the number of power transmission lines, there is a problem that much time is required for mounting work.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a wire clamp and a method of mounting the same, which can be easily mounted and can be mounted in a short time. It is a thing. The electric wire clamp according to the present invention is a wire clamp in which a clamp main body for gripping an electric wire and a clamp cap are tightened by utilizing a compression repulsive force of an elastic body. The outer peripheral surface of the tightening rod that penetrates the clamp cap is generated by moving the tightening member that is vertically movable.

The wire clamp mounting method according to the present invention is a wire clamp mounting method in which a clamp body for gripping a wire and a clamp cap are tightened by utilizing the compression repulsive force of an elastic body. First, near the steel tower,
The electric wire is loosely grasped by the clamp main body and the clamp cap, and then the clamp main body and the clamp cap are slid on the electric wire to move to a predetermined position, and finally the elastic body is brought into a compressed state so that the elastic body This is a method for attaching an electric wire clamp, characterized in that the clamp body and the clamp cap are fixed to the electric wire by utilizing the repulsive force.

[0013]

As in the electric wire clamp according to the present invention, the tightening member attached to the clamp rod penetrating the clamp body and the clamp cap so as to be movable up and down is moved relatively upward to the elastic body. When the compression repulsive force is applied, the electric wire can be loosely gripped by the clamp body and the clamp cap when the tightening member is not moved relatively upward, and the tightening member is moved relatively upward. A compression repulsive force can be easily generated in the elastic body by a simple operation of performing the operation, and the electric wire can be easily grasped by the clamp body and the clamp cap.

In the method of attaching the electric wire clamp according to the present invention, since the electric wire is loosely gripped by the clamp body and the clamp cap in the vicinity of the tower where the electric wire is hard to shake, the work can be easily performed in a short time. . Further, after the clamp body and the clamp cap are slid on the electric wire and moved to a predetermined position, only the work of bringing the elastic body into the compressed state need be performed, so that the work can be performed in a short time.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. 1 to 5 show an embodiment of an electric wire clamp according to the present invention. Note that the same parts as those in FIGS.

In the electric wire clamp according to the present invention, the length of the tightening rod 23 is longer than that of the conventional one.
As shown in FIG. 3, even if the eccentric cam 27 is rotated to compress the coil spring 25, the coil spring 25 is not compressed.

A tightening member 80 is attached to the tip end side of the tightening rod 23 so as to be vertically movable on the outer peripheral surface of the tightening rod 23. The fastening member 80 has a U-shaped cross section and is made of a spring material. Therefore, the tightening member 8
0 tightens the tightening rod 23 in the radial direction. The tightening member 80 has the same function as the conventional T-shaped engaging portion 29. That is, the clamp cap 15 can be opened and closed when the tightening member 80 is oriented in the direction perpendicular to the electric wire 11, and when the tightening rod 23 is rotated 90 ° in the closed state, the tightening member 80 is caught by the stopper wall 37. It does not rotate any further.

As shown in FIG. 4, by moving the tightening member 80 upward along the outer peripheral surface of the tightening rod 23, the coil spring 25 is put into a compressed state. When the coil spring 25 is put into a compressed state, the tightening is performed. In order to prevent the member 80 from slipping on the outer peripheral surface of the tightening rod 23, the tightening rod 2
A groove 85 is provided on the outer periphery of the groove 3. That is, the tightening member 80 is moved upward along the outer peripheral surface of the tightening rod 23 to position the tightening member 80 on the outer circumference of the groove 85.
By doing so, the tightening member 80 can hold the coil spring 25 in a compressed state without sliding on the outer peripheral surface of the tightening rod 23. Of course, the position of the groove 85 is provided at a position where the coil spring 25 can be held in a compressed state.

Next, a method of attaching the above wire clamp to an electric wire will be described. First, perform the following work near the steel tower. As shown in FIG. 1, the electric wire 11 near the steel tower is loosely held by the clamp body 13 and the clamp cap 15.
That is, the electric wire is sandwiched between the electric wire grip grooves 17 and 19 of the clamp body 13 and the clamp cap 15, and the tightening rod 2
The tightening member 80 attached to the tip side of 3 is locked to the clamp cap 15. In this state, as shown in FIGS. 1 and 2, the eccentric cam 27 is not rotating in the direction of compressing the coil spring 25.

Next, as shown in FIG. 2, the operating rod 43 is inserted into the hole 41 of the eccentric cam 27 and rotated in the direction of arrow P by 180 °. In this way, the eccentric cam 27 is connected to the coil spring 25.
The coil spring 25 is not in the compressed state as shown in FIG. 3, even when the coil spring 25 is rotated in the compressed state. That is, since the length of the tightening rod 23 is longer than in the conventional case, the coil spring 25 is not compressed even when the eccentric cam 27 is compressed.

After the above work is completed, the clamp body 13 and the clamp cap 15 are moved on the electric wire 11 to be positioned at predetermined positions. This work can be easily carried out by a person on the airborne vehicle by moving a spacer or the like. In order to prevent the electric wire 11 from being scratched when the clamp body 13 and the clamp cap 15 are moved over the electric wire 11, a hard plastic material or the like is provided between the electric wire 11, the clamp body 13 and the clamp cap 15. It is preferable to interpose a cylindrical protective body made in (4).

Clamp body 13 and clamp cap 15
After the and are moved on the electric wire 11 to be located at a predetermined position, the tightening member 80 is moved relatively upward along the outer peripheral surface of the tightening rod 23 to move the tightening member 80 into the groove 85.
Located on the outer periphery of. The electric wire 11 and the clamp body 1
In the case where a cylindrical protective body is interposed between 3 and the clamp cap 15, the work is performed after removing the cylindrical protective body. By positioning the tightening member 80 on the outer periphery of the groove 85, the tightening member 80 is moved to the tightening rod 2
The coil spring 25 can be held in a compressed state without slipping on the outer peripheral surface of 3. When the coil spring 25 is in a compressed state, the compression repulsive force causes the clamp body 13 and the clamp cap 15 to firmly grip the electric wire 11, so that the clamp body 13 and the clamp cap 15 do not move on the electric wire 11.

The tightening member 80 is attached to the tightening rod 2
The work of moving relatively upward along the outer peripheral surface of 3 is
Although it may be performed manually, it may be performed using a pressing jig 100 as shown in FIG. That is, the pressing jig 100 shown in FIG. 6 is composed of a substantially U-shaped main body 101 and a pressing portion 102 provided on the lower side. The pressing portion 102 is a hydraulic cylinder 103 and the hydraulic cylinder 103. And a pressing member 104 attached to the tip of the.

In order to move the tightening member 80 above the tightening rod 23 using the pressing jig 100,
First, the U-shaped body 101 is attached at a predetermined position, and then the hydraulic cylinder 103 is operated to operate the hydraulic cylinder 1.
Tightening member 8 by pressing member 104 attached to the tip of 03.
Press 0. Note that an electric motor, a hydraulic motor, or the like may be used instead of the hydraulic cylinder.

7 to 9 show another embodiment of the electric wire clamp of the present invention, in which the shape of the tightening member 80 is different from that of the above embodiment. That is, the tightening member 80 has a wedge piece 81 that contacts the outer circumference of the tightening rod 23.
The spring member 82 for pressing the rear end of the wedge piece 81 is housed in the tightening member main body 83.

In order to compress the coil spring 25 using the tightening member 80, the tightening member main body 83 may be moved upward along the outer peripheral surface of the tightening rod 23. That is, when the tightening member main body 83 is moved upward along the outer peripheral surface of the tightening rod 23, the wedge piece 81 and the spring material 82 are moved above the tightening rod 23 accordingly.
After the tightening member main body 83 is located at the predetermined position, the clamp cap 15 is locked on the upper surface of the tightening member main body 83,
The clamp cap 15 pushes the tightening member main body 83 downward. Then, the wedge piece 81 comes into close contact with the outer periphery of the tightening rod 23, and the tightening member main body 83 does not move downward. When such a wedge piece 81 is used, the groove 85 of the tightening rod 23 as shown in the above embodiment is unnecessary.

FIGS. 10 and 11 show still another embodiment of the electric wire clamp of the present invention. The difference from the above embodiment is that the inside of the tightening member main body 83 has a V-shaped taper shape. The groove 87 is provided, and the sphere 88 and the spring material 82 are inserted at such positions. In this structure, the spherical body 88 acts as a wedge and contacts the outer peripheral surface of the tightening rod 23, and holds the coil spring 25 in a compressed state.

The electric wire clamp used in the present invention is not limited to those of the above-mentioned embodiments. For example, a rubber elastic body or a leaf spring elastic body may be used instead of the coil spring. Good. The shape of the tightening member that compresses the elastic body is not particularly limited, and for example, an eccentric cam may not be used.

Further, it is preferable that the clamp main body 13 and the clamp cap 15 can move smoothly on the electric wire 11. For that purpose, when the electric wire is loosely gripped by the clamp main body 13 and the clamp cap 15, the clamp main body is clamped. 13 and the electric wire grip grooves 17 and 1 of the clamp cap 15
It is necessary to make the inner diameter of 9 considerably larger than the outer diameter of the electric wire 11. As a measure for this, the clamp cap 1
5 is to increase the length of the tightening rod 23 so that the opening size can be further increased by its own weight, or to position the coil spring 25 closer to the electric wire 11 side or increase the distance between the hinge portion 20 and the electric wire 11. By keeping
There is a method of effectively utilizing the opening between the clamp body 13 and the clamp cap 15.

Experiments have revealed that it is preferable that the gap between the inner diameters of the wire holding grooves 17 and 19 of the clamp body 13 and the clamp cap 15 and the outer diameter of the electric wire 11 is 3 mm or more.

Further, it goes without saying that the electric wire clamps used in the method for attaching the electric wire clamps of the present invention are not limited to those of the above-mentioned embodiments.

[0032]

As described above, the electric wire clamp according to the present invention is the electric wire clamp in which the clamp main body for holding the electric wire and the clamp cap are tightened by utilizing the compression repulsive force of the elastic body. Since the compression repulsive force of the body is generated by moving the tightening member attached to the tightening rod penetrating the clamp body and the clamp cap so as to be vertically movable, the tightening member is moved upward. In the state where it is not moved, the electric wire can be loosely held by the clamp main body and the clamp cap, and the elastic body can be easily repressed by a simple operation of moving the tightening member upward at any position. Therefore, the electric wire can be easily grasped by the clamp body and the clamp cap.

The wire clamp mounting method according to the present invention is a wire clamp mounting method in which the clamp body for holding the wire and the clamp cap are tightened by utilizing the compression repulsive force of the elastic body. First, near the steel tower,
The electric wire is loosely grasped by the clamp main body and the clamp cap, and then the clamp main body and the clamp cap are slid on the electric wire to move to a predetermined position, and finally the elastic body is brought into a compressed state so that the elastic body Since the method is characterized by fixing the clamp body and the clamp cap to the electric wire by using the repulsive force, it is possible to perform the work of loosely grasping the electric wire between the clamp body and the clamp cap near the steel tower where the electric wire is hard to shake. It can be done easily and in a short time, and after sliding the clamp body and clamp cap on the wire to the specified position, it is only necessary to put the elastic body into a compressed state. It can be done in a short time.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an electric wire clamp according to the present invention.

FIG. 2 is a sectional view of a main part before rotating an eccentric cam.

FIG. 3 is a cross-sectional view of an essential part after rotating an eccentric cam.

FIG. 4 is a cross-sectional view of a main part of a state where a coil spring is compressed.

5 is a sectional view of the tightening member shown in FIG.

FIG. 6 is an explanatory view of a pressing jig.

FIG. 7 is a cross-sectional view of essential parts showing another embodiment of the wire clamp according to the present invention.

8 is a sectional view of the tightening member shown in FIG.

9 is a bottom view of the tightening member shown in FIG.

FIG. 10 is a sectional view of an essential part showing a further embodiment of the electric wire clamp according to the present invention.

11 is a bottom view of the tightening member shown in FIG.

FIG. 12 is a plan view of a conventional wire clamp.

FIG. 13 is a front view of FIG. 12;

14 is a sectional view taken along the line AA of FIG.

15 is a cross-sectional view showing a non-compressed state of the coil spring shown in FIG.

[Explanation of symbols]

 11 wire 13 clamp body 15 clamp cap 17, 19 wire grip groove 20 hinge part 21 tightening mechanism 23 tightening rod 25 coil spring 27 eccentric cam 80 tightening member 81 wedge piece 82 spring member 83 tightening member body 85 groove 88 ball 100 pressing jig

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Naoshi Kikuchi 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Inventor Ryuji Mikami 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd.

Claims (2)

[Claims] 1. A wire clamp in which a clamp body for gripping an electric wire and a clamp cap are tightened by utilizing the compression repulsion force of an elastic body, and the compression repulsion force of the elastic body is applied to the clamp body and the clamp cap. A clamp for an electric wire, which is produced by moving a tightening member attached to an outer peripheral surface of a penetrating tightening rod so as to be vertically movable. 2. A method for mounting a clamp for an electric wire, which comprises tightening a clamp main body for holding an electric wire and a clamp cap by utilizing a compression repulsive force of an elastic body. First, the clamp main body and the clamp cap are provided near a steel tower. Grasp the wire loosely with, then slide the clamp body and clamp cap on the wire to a predetermined position, and finally by compressing the elastic body, use the repulsive force of the elastic body. A method for mounting a wire clamp, comprising fixing a clamp body and a clamp cap to a wire.