JP2000261941A - Wedge-type anchoring clamp and wedge push-in device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform both wedge push-in and pull-out through the use of one wedge pushing-in device set by projecting support shafts toward both-side outsides of a clamp, fitting arms to the support shafts freely-rotatably, pressing the wedge on the anchoring side of the clamp, and pressing and extracting the wedge on the opposite side. SOLUTION: A clamp 1 grasps an electric wire opposing its clamping segments 1a, 1b having c-shaped cross sections to each other. Wedges 2a, 2b to be used are capable of filling gaps above and below an electric wire E. The electric wire E is interposed therebetween beforehand, and a belt is fastened at edge parts, and its tip part is inserted into the clamp. The clamp 1 is stuck by inserting support shafts 4 into shaft holes 3 bored in both-side central parts. The support shafts 4 protrude to the outside and lock each one end of arms 5. The support shafts 4 are on the diameter line of the electric wire E. The arms 5 are rotatable at the upper and lower surfaces of the electric wire, have holes bored at end parts, and locked to an iron tower by the holes. Consequently, a push-in device set can be diverted for a push-out purpose.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wedge-type clamp for retaining electric wires, and more particularly, to a wedge pushing-in device capable of both pushing and removing wedges.

[0002]

2. Description of the Related Art A hydraulic device for pushing wedges into gaps above and below a wire of a clamp for holding the wire is disclosed in Japanese Patent Laid-Open No. Hei 6-1894.
33 are known.

[0003]

However, once the wedge has been pushed in, the wedge may be pulled out and then re-pushed in due to adjustment of the wire slackness or other circumstances. In that case, since only the pushing of the retaining clamp in the above-mentioned reference can be performed, it is necessary to prepare some other device for extracting. Since the work is performed in a high place space, there has been a long-awaited need for a clamp capable of both pushing and removing a wedge with a single device.

[0004]

SUMMARY OF THE INVENTION The clamp in the above-mentioned known reference is provided with U-shaped bearings on both outer sides, the arm is stopped on the shaft, and the other end of the arm is locked to the steel tower. This arm simultaneously supports the hydraulic cylinder and presses the wedge with its piston rod. However, the U-shaped bearing is a side-open type, and allows only the side locking of the arm. On the other hand, in the present invention, instead of the U-shaped bearing, a support shaft is provided to protrude outward on both sides of the clamp. And the arm is rotatably provided on its support shaft,
The wedge is pressed on the clamp stopping side, and the wedge is pressed on the opposite side to enable removal.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a clamp 1 holds an electric wire with clamping pieces 1a and 1b having a C-shaped cross section facing each other. The wedges 2a and 2b are capable of filling the upper and lower gaps of the electric wire E. The wedges 2a and 2b are previously sandwiched with the electric wire E, tightened with bolts at the ears 2c, and the tips are inserted into the clamp. The clamp 1 inserts and fixes the support shaft 4 into a shaft hole 3 formed in the center of both sides and projects outward. One end of the arm 5 is locked to this. The support shaft 4 is on the diameter line of the electric wire E, and the arm 5 is rotatable in the direction of the arrow on the lower surface of the upper surface of the electric wire and has two holes 5 at the end.
a, 5b are drilled. The arm 5 is locked to the steel tower by the hole 5b. FIG. 5 shows another embodiment of the clamp 1. A hinge is provided at the top or bottom of the opposing piece of the C-shaped cross section of the clamp 1 so that either one of the hinges can be selectively coupled to facilitate attachment to the electric wire E. Next, in FIG. 4, a hydraulic cylinder C is fixed at the upper center of the retaining plate 6, and a semicircular cut 6a that can be straddled on the electric wire E is located at the lower center.
However, notches 6b into which the arms 5 can be inserted are provided on both sides thereof. The arm 5 inserted into the cut 6b has a hole 5a.
Is supported by the pin 7. A pressing plate 9 is fixed to an end of the piston rod 8 of the hydraulic cylinder C, and an adapter 9a is provided on the plate surface so as to be able to simultaneously press upper and lower wedges. This adapter has a U-shape that can be inserted into the wire E,
Press the upper wedge at the bend and the lower wedge at both leg ends.

[0006]

FIG. 6 shows a case where the electric wire E is extended through a steel wheel (not shown) for stopping a steel tower and is temporarily fixed by a cam-along A. Attach the clamp 1 to a part of the slack electric wire behind the temporary fixing point, rotate the arm 5 toward the tower,
b is connected to the mounting bracket K and stopped on the insulator G of the steel tower.
It is locked to the retaining plate 6 by a. In this state, the oil is fed to the cylinder C, the wedge 2 is pushed by the pressing plate 9, and the electric wire can be stopped by the clamp. Then, the cam-along A is loosened to transfer the tension from the wire W to the electric wire E, and the cam-along is removed to complete this work. If it becomes necessary to remove the wedge at a stage before the removal of the cam-along, the locking of the locking plate 6 by the arm 5 is released, and the wedge pushing device of FIG. Reference numeral 5 re-locks the locking plate rotated and rotated around the support shaft 4. Then the wedge is pressed from the opposite side. If the tip of the wedge is hidden in the clamp, the adapter 9a may be pressed with an appropriate distance piece.

[0007]

As described above, wedges are all operations in a high space, as described above. Preparing another set of equipment for sampling and arranging it on the opposite side of the wedge was an unbearable labor for workers. The present invention rationalizes this point, and is characterized in that one set of pushing devices can be diverted to extraction.

[Brief description of the drawings]

FIG. 1 is a side view of a clamp.

FIG. 2 is a plan view of upper and lower wedges.

FIG. 3 is a perspective view of a clamp.

FIG. 4 is a perspective view near a cylinder.

FIG. 5 is another embodiment of the clamp.

FIG. 6 is a diagram illustrating the operation of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp 2a, 2b Wedge 3 Shaft hole 4 Support shaft 5 Arm 6 Retaining plate 7 Pin 8 Piston rod 9 Press plate 9a Adapter C Hydraulic cylinder A Cam Along G Insulator W Wire E Electric wire K Mounting bracket

Claims (3)

[Claims] 1. A clamp for holding an electric wire with C-shaped cross-section pieces facing each other, a pair of wedges which are inserted into upper and lower gaps between the clamp and the electric wire and which can fix both by pushing, and outer sides on both sides of the clamp. And a pair of arms, one end of which is rotatably supported by the above-mentioned support shaft and the other end of which is locked to a steel tower. A wedge pushing device is attached to the arm to remove the wedge. A wedge-type retaining clamp characterized in that the wedge-type retaining clamp is capable of being pushed into the clamp or pressed from the opposite direction of the clamp and withdrawn. 2. The wedge-type retaining clamp according to claim 1, wherein the top or bottom of the C-shaped cross-section facing piece is a clamp capable of being hinged. 3. A hydraulic cylinder is fixed at right angles to the plate surface at the upper center of the rectangle, a semicircular cut corresponding to the electric wire is inserted at the center of the lower piece, and the arm according to claim 1 is inserted at both sides thereof. A locking plate provided with notches that can be locked, a pressing plate fixed to the piston rod end of the cylinder and facing the wedge end, and an adapter fixed to the pressing plate surface and capable of simultaneously pressing upper and lower wedges. The wedge pushing device according to claim 1 or 2, wherein