JP2012105437A - Wedge type anchor clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wedge type anchor clamp for easy installation work of an electric wire which pulls an overhead transmission line to a steel tower.SOLUTION: The wedge type anchor clamp pulls an overhead transmission line to a steel tower. It includes a clamp body 10 which holds an electric wire at cable-tensioning work of it, a pair of wedges 60 which are press-fitted into a vertical gap between the clamp body 10 and the electric wire held by it, for securing the electric wire, a pair of connection plates 20 whose one end is rotatably supported by both sides of the clamp body 10, a clevis link 30 connected to the other end of the pair of connection plates 20, and a cable-tensioning link 70 fitted to one side of both sides of the clamp body 10. The clamp body 10 has a two-piece structure, being divided in two halves on both sides.

Description

  The present invention relates to a wedge-type retention clamp for pulling an overhead power transmission line to a steel tower, and more particularly to a wedge-type retention clamp that can easily perform an electric wire erection operation.

  FIG. 3 is a configuration diagram of a conventional wedge-type retention clamp (double wedge, MBT). In FIG. 3, a conventional wedge-type retention clamp 200 includes a clamp main body 11 that holds the electric wire during the wire tightening operation, and a vertical gap between the clamp main body 11 and the electric wire 90 held by the clamp main body 11 (see FIG. 2c). A pair of wedges 60 that are press-fitted into and fixed to the electric wire, a pair of connection plates 20 each having one end supported by the rotatable portion 15 on both sides of the clamp body 11, and locked to the other ends of the pair of connection plates 20 A clevis link 30 connected by a pin 40 and a tight link 70 attached to one side of both sides of the clamp body 11 by a fixing bolt 75 are provided.

  By the way, when the electric wire 90 is gripped by the wedge-type retention clamp 200 and is installed on the steel tower via the insulator series, the clamp body 11 holds the electric wire 90 before being fitted to the wedge 60 holding the electric wire 90. There is a need. For this reason, the nut of the locking pin 40 is loosened, and the connecting plate 20 on the upper side of the drawing is removed from the bolt of the locking pin 40. As a result, the clamp body 11 is opened on both sides around the hinge portion 12 so as to hold the electric wire 90, and after the connecting plate 20 is fixed again by the locking pin 40, the clamp body 11 is fitted with the wedge 60. Thus, in order for the clamp main body 11 to hold the electric wire 90, it is necessary to remove the connecting plate 20 from the locking pin 40 once, hold the electric wire 90, and fix the connecting plate 20 again. The erection construction process became complicated and there was a problem in workability.

  In Patent Document 1, a block that is detachably attached to a pair of straps provided on both sides of a clamp body, and a block so that the axial direction of a drive shaft coincides with the axial direction of a wedge body that grips an electric wire. A pressure cylinder having one end provided at the tip of the drive shaft of the pressure cylinder, the other end abutting against the wedge body holding the electric wire, and having a groove into which the electric wire is inserted. There is a statement to that effect.

JP-A-6-189433

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a wedge-type retention clamp that can easily perform an electric wire erection operation for pulling an overhead power transmission line to a steel tower.

  The wedge-type retention clamp of the present invention is a wedge-type retention clamp for pulling an aerial transmission line to a steel tower, and is held by the clamp main body, the clamp main body, and the clamp main body. A pair of wedges that are press-fitted into the upper and lower gaps of the connected electric wire and fix the electric wire, a pair of connecting plates that are rotatably supported on both sides of the clamp body, and the other end of the pair of connecting plates. A clevis link and a tight link attached to one side of both sides of the clamp body, and the clamp body has a two-part structure divided into both sides.

  ADVANTAGE OF THE INVENTION According to this invention, the wedge type | mold retention clamp which can perform the electric wire construction work which pulls an overhead power transmission line to a steel tower can be provided.

The block diagram of the wedge type | mold retention clamp by this invention. The construction drawing of the wedge type retention clamp by this invention. The block diagram of the conventional wedge type | mold retention clamp.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a structural diagram of a wedge-type retention clamp according to the present invention. In FIG. 1, the clamp body 10 of the wedge-type retaining clamp 100 has a two-part structure in which the clamp body 10 is divided into both side portions.

  FIG. 1 a shows a state in which the bolt and the nut of the locking pin 40 are tightened enough that the clamp body 10 is fitted to the two wedges 60 holding the electric wire 90. In FIG. 1b, in order to hold the electric wire 90, the nut of the locking pin 40 is loosened, and the connecting plate 20 on the upper side of the drawing is lifted upward in accordance with the amount of looseness of the bolt of the locking pin 40. 10 shows a state where the wire 90 is opened enough to hold the wire 90.

  FIG. 2 is a construction diagram showing a process of attaching the wedge type retaining clamp according to the present invention. In FIG. 2 a, the wedge type retaining clamp 100 is connected to an insulator series (not shown) attached to the steel tower by a clevis link 30 and a cotter pin 50. The electric wire 90 is gripped by an electric wire gripping tool having a pulley of the wire tightening tool 80, and a wire having one end connected to the wire link 70 passes the wire 90 toward the wedge-type retention clamp 100 via the pulley. Pull to a predetermined position.

  In FIG. 2 b, when the electric wire 90 is pulled toward the wedge-type retention clamp 100 to a predetermined position, the nut of the locking pin 40 is loosened, and the connecting plate 20 on the upper side of the drawing becomes the amount of loosening of the bolt of the locking pin 40. Accordingly, the two wedges 60 are removed, and the clamp body 10 is opened enough to hold the electric wire 90, and the electric wire 90 is set at the holding position of the clamp main body 10.

  In FIG. 2 c, the two wedges 60 hold a predetermined position of the electric wire 90, and the clamp body 10 is tightened by the bolts and nuts of the locking pins 40 sufficient to fit the two wedges 60. Next, the wire whose one end is connected to the tight link is loosened until the two wedges 60 are fitted in a predetermined position of the clamp body 10, and the installation of the electric wire 90 is completed.

  As described above, according to the present invention, the connection plate 20 can be lifted upward and the electric wire 90 can be easily set at the holding position of the clamp body 10 simply by loosening the nut of the locking pin 40. Thus, it is not necessary to remove the nut of the locking pin 40 and the connecting plate 20 from the bolt, and the operation is simplified. Moreover, the trouble of dropping the nut by mistake is also eliminated. In this way, it is possible to provide a wedge-type retention clamp with good workability that can easily perform an electric wire erection operation of pulling an overhead power transmission line to a steel tower.

DESCRIPTION OF SYMBOLS 10 Clamp main body 11 Clamp main body 12 Hinge part 15 Rotatable part 20 Connection board 30 Clevis link 40 Locking pin 50 Cotter pin 60 Two wedges 70 Tightening link 75 Fixing bolt 80 Tightening tool 90 Electric wire 100 Wedge type retention clamp by this invention 200 Conventional wedge-type retention clamp

Claims (1)

A wedge-type retention clamp for towing an overhead power transmission line to a steel tower,
A clamp body for holding the electric wire during the wire tightening operation;
A pair of wedges that are press-fitted into a vertical gap between the clamp body and the electric wire held by the clamp body to fix the electric wire;
A pair of connecting plates each having one end rotatably supported on both sides of the clamp body;
A clevis link coupled to the other end of the pair of coupling plates;
A tight link attached to one side of both sides of the clamp body;
2. The wedge-type retention clamp according to claim 1, wherein the clamp body has a two-divided structure that is divided into both side portions.

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