JPH073217U - Straining clamp for high tension cable - Google Patents

Abstract

(57) [Abstract] [Purpose] A high-tension cable retaining clamp that allows the bypass cable to be attached and detached easily and reliably even on pole work during uninterruptible work on 6600V high-voltage distribution lines. For the purpose of provision. [Structure] Instead of the conventional wedge method, a link mechanism is used,
The structure is such that the clamps that can move up and down in parallel are pressed against the cable grip of the fixed clamp body to grip the cable. -A spring is incorporated in the base of the frame, and when the tightening fitting is released from the open state, it automatically rises upward and returns to its original position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cable holding clamp, and more particularly to a clamp that temporarily holds a bypass cable during uninterruptible work on a 6600V high-voltage distribution line or the like.

[0002]

[Prior art]

 Conventionally, as a retaining clamp for a high-tension cable, as shown in FIGS. 3 and 4, in a retaining clamp in which a wedge body 20 is attached to a clamp body 10, a bypass cable is provided between the wedges 20. (Indicated by an imaginary dotted line in FIG. 3), the support metal fitting 30 was pulled in the direction of the arrow and retained.

[0003]

[Problems to be solved by the device]

 In the retaining clamp having the structure described in the prior art, the wedge 20 is divided in half, and therefore, when the cable is mounted, the portion of the wedge 20 is pressed down with both hands and the wedge 20 is pressed. There was a problem that the cable would slip and could not be fixed to the clamp unless tension was applied with the cable slightly biting into the sheath of the cable.

Further, since almost all uninterruptible work is done on a pillar, it is almost impossible to hold down the wedge with both hands, and even if it is held down with one hand, it is unsafe work and a skilled person is required. However, there was a problem that the work was difficult to do.

Furthermore, after the uninterruptible construction work, when the cable is removed from the clamp, the wedge bites tightly into the cable sheath, so that it cannot be removed unless the wedge is hit with a hammer or the like. Therefore, there has been a demand for a high tension cable retention clamp having a structure that does not have these problems. The present invention has been made in response to such a demand, and an object thereof is to provide a retractable clamp for a high-tensile cable, which enables easy and reliable attachment and detachment of the cable.

[0006]

[Means for Solving the Problems]

 The lower ends of a plurality of arms are rotatably pivoted at appropriate intervals on the base of the clamp body that has a cable gripping groove on the upper part, and are tilted at an appropriate angle in the direction opposite to the cable holding direction. The upper ends of the arms are spaced at the same intervals, a hook metal fitting is attached to one end, and the fitting is rotatably attached to the lower end of the tightening metal fitting that has a cable grip groove on the upper end. The lower end of each arm and the base of the clamp body are connected to each other by the spring at the pivotally connecting portion so that they are located above.

[0007]

[Action]

 The movement of the tightening metal is constrained by an arm, and it is normally positioned by springs so that it is located above with a certain tightening margin.However, the hook metal is not attached in the direction opposite to the cable pulling direction. When you press with, the arm rotates and the tightening fitting lowers in parallel to the lower side, opening so that the cable can be mounted.

In this state, the cable is mounted between the cable gripping groove of the clamp body and the cable gripping groove of the tightening fitting, and the pressing force applied to the hook fitting is released. It is automatically pushed up by the action of the spring and holds the cable sheath. Then, when the tow rope is pulled, the tightening fitting is pushed further upward, firmly gripping the cable case, and the slippage disappears.

[0009]

【Example】

 An example of the embodiment of the present invention will be described with reference to FIGS. 1 and 2. The lower ends of the arms 3 and 3'are rotatably provided at appropriate intervals on the base of a clamp body 2 having a cable gripping groove 1 on the top. Pivot the upper ends of the arms 3 and 3'to an angle opposite to the direction in which the cables are held, and at the same interval as the lower ends, hook metal fittings 4 are attached to one end and the cable is attached to the upper end. -Attach rotatably to the lower end of the fastening member 6 having the bull gripping groove 5, and normally keep the fastening member 6 at a predetermined tightening margin t so as to be located above. The lower end of 3'and the base of the clamp body 2 are connected by a spring 7. In addition, 8 is a tow rope.

The material of the clamp body and the clamp is preferably aluminum alloy from the viewpoint of lightness. There are various methods of keeping a predetermined tightening margin t in the tightening fitting 6 by leaving a surplus force in the spring 7 when not in use. For example, the tightening fitting 6 and the clamp body It is easy to touch a part of 2 and receive the remaining spring force. Further, a spacer having the same thickness as the tightening allowance t may be attached.

In implementation, first, in FIG. 1, when the hook metal fitting 4 is lightly pushed to the right side by the thumb, the arms 3 and 3'are rotated, the fastening metal fitting 6 is lowered, and the cable can be mounted. Open to the extent. Then, the cable is fitted into the cable gripping groove 5 through its opening, and the thumb is released from the hook fitting 4, so that the arms 3 and 3'are rotated in the opposite direction by the spring force of the spring 7. Then, the fastening metal fitting 6 is automatically pushed upward and gripped between the cable gripping groove 1 of the clamp body 2 and the cable gripping groove 5 of the fastening metal fitting 6. Then, when the tow rope 8 is pulled to the left, the tightening metal member 6 is pushed up further to firmly grip the cable.

When the cable is removed from the clamp after the work is completed, if the hook metal fitting 4 is lightly pushed to the right side with the thumb, the arms 3 and 3'are rotated and the tightening metal fitting 6 is lowered. , Can be easily removed.

[0013]

【effect】

 Since the present invention is configured as described above, it has the following effects.

There is no need to press the wedge strongly with both hands or one hand as in the past, and you can lightly press the hook metal fitting with your thumb etc., and after mounting the cable, just release your thumb etc. Even if there is, you can easily attach the cable.

When the tow rope is pulled, the arm rotates and steadily pushes up the fastening metal, so there is no slippage as in the conventional case.

After the work, when the cable is removed from the clamp, it is only necessary to lightly push the hook metal fitting with the thumb or the like, which makes the work easier than ever. This device exerts the above effects, and its industrial utility value is remarkable.

[Brief description of drawings]

FIG. 1 is a front view showing an example of implementation of the present invention.

FIG. 2 is a right side view showing an example of implementation of the present invention.

FIG. 3 is a front view showing a conventional example.

FIG. 4 is a right side view showing a conventional embodiment.

[Explanation of symbols]

 1 cable gripping groove 2 clamp body 3 arm 3'arm 4 hook metal fitting 5 cable gripping groove 6 tightening metal fitting 7 spring 8 pulling rope 10 conventional clamp body 20 wedge 30 support metal fitting t tightening margin

Claims (1)

[Scope of utility model registration request] 1. A lower end of an arm (3, 3 ') is rotatably pivoted at an appropriate interval to a base of a clamp body (2) having a cable gripping groove (1) on an upper part thereof, Arm (3,
3 ') The upper end of 3') is tilted at an appropriate angle in the opposite direction to the cable holding direction, the hook metal fittings (4) are attached to one end, and the cable gripping groove (5) is attached to the upper end. It is rotatably attached to the lower end of the metal fitting (6), and the armature (3, 3 ') is attached at the pivoting portion so that the tightening metal fitting (6) is always located above with a predetermined tightening margin (t). )
Strain clamp for high tension cable, characterized in that the lower end of the clamp and the base of the clamp body (2) are connected by a spring (7).