JPH09163565A - Wire clamp - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide an electric wire clamp capable of easily attaching an electric wire clamp to an electric wire in a short time. SOLUTION: A locking projection 29 is provided in the axial direction of a tightening rod 23.
A and 29B are formed in two steps, and the clamp cap 15
When the locking projections 29A and 29B pass through, the locking projections 29A and 29B are rotated to pass through the locking projections 29A and 2B.
After 9B passes, it returns to the original state and the locking projection 29A.
The rotation locking body 50 that engages with the rotation locking body 5 is provided. First, the locking projection 29A of the first stage located on the outer side is fixed to the rotation locking body 5.
By engaging with 0, the clamp main body 13 and the clamp cap 15 loosely grip the electric wire, and then the second locking convex portion 29B located inside is engaged with the rotary locking body 50. , Clamp body 13 and clamp cap 1
With 5, the wire is firmly gripped.

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 in which a clamp body for holding an electric wire and a clamp cap are tightened by using a tightening rod penetrating them.

[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 are electric wire clamps configured to tighten the clamp body and the clamp cap by using a tightening rod having a locking projection on one end side. .

An example of such a wire clamp 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. 8, the clamp body 13 and the clamp cap 15 are openably and closably coupled to each other by the hinge portion 20 on one side of the wire gripping grooves 17 and 19, and on the other side, the tightening rod 23 and the coil spring 2 are connected.
5, the eccentric cam 27, and the like, and the tightening mechanism 21 is used for tightening.

The tightening rod 23 of the tightening mechanism 21 penetrates through the clamp body 13 and has a locking projection 29 (FIG. 9, FIG. 9) that engages with the open end side of the clamp cap 15 at one end thereof.
(See FIG. 10), and the eccentric cam 27 is rotatably attached to the other end by a shaft pin 31. Also, the coil spring 25, together with the washer 33, has the tightening rod 2
It is arranged between the eccentric cam 27 and the clamp body 13 in a state of passing through 3.

On the open end side of the clamp cap 15, a notch (or an elongated hole) 35 through which the locking projection 29 of the tightening rod 23 can pass when it is oriented in a direction perpendicular to the electric wire, and the electric wire 1
1 is formed with a stopper wall 37 that is caught when facing in the direction parallel to 1. That is, the clamp cap 15 can be opened and closed by setting the locking projection 29 of the tightening rod 23 in the direction perpendicular to the electric wire 11, and can be opened and closed by rotating the tightening rod 23 by 90 ° in the closed state. Is caught on the stopper wall 37 and is prevented from further rotation.

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. 9 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. 7, and has a bent portion formed with a hole 41 for turning operation.

Next, a procedure for gripping an electric wire with the electric wire clamp will be described. First, as shown in FIG. 10, the eccentric cam 27 is set in a state where the coil spring 25 is not compressed, and the tightening rod 23 is rotated to direct the locking projection 29 in the same direction as the elongated hole 35 to open the clamp cap 15. Next, the electric wire 11 is inserted between the clamp body 13 and the clamp cap 15, and the clamp cap 15 is closed.
Rotate it by 0 ° to move the locking protrusion 29 to the clamp cap 15.
To be engaged.

Next, as shown in FIG. 10, 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. 8 and 9, the eccentric cam 27 compresses the coil spring 25, and 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.

However, there is a problem that the workability is poor because the work for attaching the electric wire clamp is an operation on an unstable electric wire. Also, the number of electric wire clamps to be attached to one transmission line is very large, and in particular, for spacers used in multi-conductor transmission lines with 4 conductors or more, one spacer has 4 or more electric wire clamps, which is the same as the number of transmission lines. Therefore, there is a problem that it takes a lot of time for the mounting work.

Therefore, first, near the steel tower, the electric wire is loosely gripped by the clamp body and the clamp cap, and then the clamp body and the clamp cap are slid on the electric wire to move to a predetermined position, and finally the coil spring is compressed. There has been proposed a method for attaching an electric wire clamp in which the clamp body and the clamp cap are fixed to an electric wire by utilizing the repulsive force of the coil spring by setting the state.

According to such a wire clamp mounting method, the work of loosely gripping the wire between the clamp body and the clamp cap can be performed near the steel tower where the wire does not easily shake, so that the work is 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 operation of putting the coil spring into a compressed state is performed, and therefore the work can be performed in a short time. There is an advantage.

[0013]

However, when the above-mentioned work is attempted by using the conventional wire clamp, the conventional wire clamp has a structure in which the eccentric cam attached to the tightening rod is rotated to compress the coil spring. Therefore, there is a problem that it is difficult to loosely grip the electric wire between the clamp body and the clamp cap near the steel tower. That is, when the eccentric cam is rotated, the coil spring is compressed, and accordingly, the clamp body and the clamp cap firmly grip the electric wire, and it is difficult to grip the electric wire loosely. On the other hand, if the eccentric cam is not rotated in order to hold the wire loosely, the locking projection of the tightening rod will come off the clamp cap, which may cause the wire to slide and move to the specified position. The problem is that it becomes difficult.

[0014]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and utilizes a clamp body for holding an electric wire and a clamp cap by using a tightening rod having a locking projection on one end side. In an electric wire clamp that is tightened, the locking projections are formed in at least two stages in the axial direction of the tightening rod, and a rotation locking body for locking the locking projections is provided on the clamp body or the clamp cap. The rotation locking body rotates to pass the locking projection when the locking projection passes, and returns to the original state after the locking projection passes and returns to the locking projection. It is characterized in that it is configured to engage with the section.

As described above, the locking projections are formed in at least two stages in the axial direction of the tightening rod, and the locking projections are rotated when the locking projections pass through the clamp body or the clamp cap. Is provided, and after the locking convex portion has passed, it is returned to the original state and a pivotal locking body that engages with the locking convex portion is provided. By engaging the rotation locking body with the clamp body and the clamp cap to loosely grasp the electric wire, and then engaging the second locking projection located inside with the rotation locking body. Thus, the electric wire can be firmly gripped by the clamp body and the clamp cap.

Therefore, the work of loosely grasping the electric wire near the tower where the electric wire is hard to shake, and the work of firmly grasping the electric wire after the clamp body and the clamp cap are slid on the electric wire and moved to a predetermined position Can be performed easily and in a short time.

The electric wire clamp according to the present invention is an electric wire clamp in which a clamp body for holding an electric wire and a clamp cap are tightened by using a tightening rod having a locking projection on one end side. The main body or the clamp cap is provided with a rotation locking body that locks the locking projection, and the rotation locking body rotates when the locking projection passes and the locking projection is locked. It is characterized in that it is configured to be passed through, and after the locking convex portion has passed, it returns to the original state and is engaged with the locking convex portion.

As described above, when the locking projections pass through the clamp body or the clamp cap, they rotate to pass the locking projections, and after the locking projections pass, the original state is restored. By providing the rotation locking body that engages with the locking projection, the work of firmly gripping the electric wire by the clamp body and the clamp cap can be easily performed.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. 1 to 6 show an embodiment of an electric wire clamp according to the present invention. The same parts as those in FIGS. 7 to 10 are designated by the same reference numerals and the description thereof will be omitted.

In the electric wire clamp according to the present invention, the locking projections 29A and 29B are formed in two steps in the axial direction of the tightening rod 23, and the locking projections 29A and 29B are formed on the clamp body 13 or the clamp cap 15. It is characterized in that a rotary locking body 50 that engages with is provided.

That is, locking projections 29A and 29B are provided on one end side of the tightening rod 23 in the axial direction thereof, and the locking projections 29A and 29B are T-shaped. Although the number of the locking projections 29A and 29B in the embodiment is two, the number may be three or the like and is not particularly limited.

On the other hand, the rotary locking body 50 is provided on the clamp cap 15, and the rotary locking body 50 includes a lock fitting 51 and a leaf spring 52 for keeping the lock fitting 51 in a horizontal state. I have it. The lock fitting 51 has a pin 53
Is attached to the clamp cap 15 by the upper surface of which is engaged with the inner surface of the clamp cap 15,
A leaf spring 52 is engaged with the lower surface.

Therefore, when the upper surface of the rotation locking body 50 is pushed by the locking projections 29A and 29B of the tightening rod 23, the rotation locking body 50 rotates downward about the pin 53, and the locking projection 29A.
-When 29B passes, it returns to the original horizontal state by the repulsive force of the leaf spring 52. At this time, the upper surfaces of the locking projections 29A and 29B engage with the lower surface of the rotary locking body 50.

Next, a method for attaching the electric wire clamp having the above-described structure to the electric wire will be described. First, perform the following work near the steel tower. First, as shown in FIG.
The first locking protrusion 29A is engaged with the rotary locking body 50. This work is performed by the first locking projection 29 of the tightening rod 23.
It can be easily performed by pushing A into the rotation locking body 50. Next, the eccentric cam 27 is rotated in the direction of arrow P to bring the coil spring 25 into a compressed state. In this state, the clamp body 13 and the clamp cap 15 loosely grip the electric wire 11. The gap between the clamp body 13 and the clamp cap 15 and the outer diameter of the electric wire 11 is preferably 3 mm or more.

Next, 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.

When the clamp body 13 and the clamp cap 15 are moved on the electric wire 11, the electric wire 11 and the clamp body 13 are prevented in order to prevent the electric wire 11 from being damaged.
It is preferable that a cylindrical protective body made of hard plastic or the like be interposed between the clamp cap 15 and the clamp cap 15.

Clamp body 13 and clamp cap 15
After and are moved to a predetermined position on the electric wire 11, the second locking projection 29B of the tightening rod 23 is engaged with the rotary locking body 50 as shown in FIG. In this work, the second locking projection 29B of the tightening rod 23 is rotated by the rotary locking body 5.
It can be easily done by pushing it to 0. The second locking protrusion 29B of the tightening rod 23 is attached to the rotary locking body 50.
The electric wire 11 can be firmly gripped by the clamp body 13 and the clamp cap 15 by engaging with.

The operation of engaging the second locking projection 29B of the tightening rod 23 with the rotary locking body 50 may be performed manually, but a compression jig 80 as shown in FIG. 6 is used. May be used. This compression jig 80 has a U-shaped frame 8
1, a compression member 82 arranged in the U-shaped frame 81 and engaged with the lower wall of the clamp cap 15, and a hydraulic cylinder 83 for moving the compression member 82 up and down.
In order to engage the second locking convex portion 29B of the tightening rod 23 with the rotary locking body 50 using this compression jig 80, the upper portion of the U-shaped frame body 81 is engaged with the eccentric cam 27. Combined compression material 8
2 is compressed toward the lower wall of the clamp cap 15. This allows the clamp body 13 and the clamp cap 15 to be easily tightened.

In the electric wire clamp according to the present invention, a coil spring or an eccentric cam may not be provided, and the clamp body may be directly clamped by the clamp rod. Further, the number of the locking projections provided on the tightening rod 23 may be one. If the number of the locking projections is one as described above, the electric wire cannot be loosely gripped by the clamp body and the clamp cap, but there is an advantage that the clamp body and the clamp cap can be easily tightened. is there.

Further, the structure of the rotation locking body 50 is not particularly limited as long as it can lock the locking projection after passing through the locking projection. Further, the rotation locking body 50 may be provided on the clamp body side.

[0031]

As described above, the electric wire clamp according to the present invention is an electric wire obtained by tightening the clamp body for holding the electric wire and the clamp cap by using the tightening rod having the locking projection on one end side. In the clamp for use, the locking projection is formed in at least two stages in the axial direction of the tightening rod, and the clamp main body or the clamp cap is provided with a rotary locking body for locking the locking projection. The rotation locking body rotates to pass the locking projection when the locking projection passes, and returns to the original state after the locking projection passes and engages with the locking projection. Therefore, first, by engaging the locking projection of the first step located on the outer side with the rotation locking body, the electric wire is connected between the clamp body and the clamp cap. Gently grasp it, and then turn the second locking protrusion located inside. By engaging the locking member, it is possible to firmly grip the wire between the clamp body and the clamping cap. Therefore, the work of loosely gripping the wire near the steel tower where the wire does not easily shake, and the work of firmly gripping the wire after the clamp body and clamp cap have been slid over the wire and moved to the specified position, are easy. And it can be done in a short time.

Further, the electric wire clamp according to the present invention is an electric wire clamp in which a clamp body for holding an electric wire and a clamp cap are tightened by using a tightening rod having a locking projection on one end side. The main body or the clamp cap is provided with a rotation locking body that locks the locking projection, and the rotation locking body rotates when the locking projection passes and the locking projection is locked. After passing, the locking projection returns to its original state after passing and engages with the locking projection, so the work of firmly gripping the wire with the clamp body and clamp cap can be performed easily. You can

[Brief description of the drawings]

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

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view of a main part of a state where an electric wire is loosely gripped.

FIG. 4 is a cross-sectional view of an essential part in a state where an electric wire is firmly gripped.

FIG. 5 is a bottom view of FIG. 2;

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

FIG. 7 is a plan view of a conventional wire clamp.

FIG. 8 is a front view of FIG. 7;

FIG. 9 is a cross-sectional view of essential parts after the eccentric cam is rotated.

FIG. 10 is a cross-sectional view of essential parts before rotating the eccentric cam.

[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 29 29A 29B locking convex part 50 rotating locking body 51 locking metal fitting 52 leaf spring 80 compression cure Ingredient

Claims (2)

[Claims] 1. A wire clamp comprising a clamp body for holding an electric wire and a clamp cap, which are tightened by using a tightening rod having an engaging projection on one end side, wherein the engaging projection is a shaft of the tightening rod. Direction is formed in at least two stages, and the clamp main body or the clamp cap is provided with a rotation locking body for locking the locking projection, and the rotation locking body passes through the locking projection. The electric wire clamp is characterized in that it is configured to rotate so as to pass through the locking convex portion, and after the locking convex portion has passed, returns to the original state and engages with the locking convex portion. 2. A wire clamp in which a clamp body for gripping an electric wire and a clamp cap are tightened by using a tightening rod having a locking projection on one end side, wherein the lock is held on the clamp body or the clamp cap. A rotation locking body for locking the convex portion is provided, and the rotation locking body rotates when the locking convex portion passes to pass the locking convex portion. The electric wire clamp is characterized in that after passing, it returns to the original state and is engaged with the locking convex portion.