JPH0711837U - Wedge type detention clamp - Google Patents

Abstract

(57) [Summary] [Purpose] It has the same strength as before, does not deteriorate in performance, allows complete prefabricated overhead wires on the ground, shortens the construction time, and can be used on steel towers. It is an object of the present invention to provide a towing clamp capable of eliminating the handling work of heavy objects in the field. A clamp body 1 formed by bending a plate material into a U-shaped cross-section and having a substantially triangular side surface shape, and a wedge 5 having one surface in contact with an electric wire 20 and an inclined surface 8 on the opposite surface,
Wedge receiving surface 10 which is pivotally mounted between the lateral sides 2, 2 of the clamp body 1 and cooperates with the sloped surface 8 of the wedge 5.
In the retaining clamp in which the wedge retainer 9 having the above and the reinforcing plate 14 'that covers the clamp body 1 are bolted together, another bolt 16 is sandwiched in the clamp body 1 with respect to the clamp body 1 and the reinforcing plate 14'. By connecting plate 1
The 5'was attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a wedge-shaped retractable clamp of a type in which an electric wire is held on a clamp body by using a wedge.

[0002]

[Prior art]

 The clamp body 1 of the conventional wedge-shaped strain clamp (hereinafter referred to as the strain clamp) A'is made by bending a plate made of metal such as aluminum alloy so that its cross section becomes U-shaped, and the sides 2 and 2 are shaped like a right-angled triangle. To extend along one of the two sides that sandwich the right angle of the side part 2, and to receive the wire a (Fig. 7) in the semi-cylindrical curved surface part 3 that forms the bottom part that is bent in a U shape. It has become. Therefore, the diameter of the curved surface portion 3, that is, the distance between the side portions 2 and 2 is substantially equal to the diameter of the electric wire a. Since the curved surface portion 3 supports the electric wire a placed along the curved surface portion 3, the portion near the outer end has the guide portion 4 which is bent so that the electric wire a emerging from the outer end is not bent at a sharp angle here. is doing.

The wedge portion of the elongated wedge 5 that acts to hold the electric wire a in the clamp body 1 has one surface (the lower surface during use) having a radius substantially equal to the radius of the electric wire a, and the wedge portion is provided on the outer circumference of the electric wire a. It has a wire-engaging surface 7 made of a cylindrical surface on which it can ride, and an inclined surface 8 for performing a wedge action on the opposite side surface (upper surface in use). Because of the sloped surface 8, the wedge 5 has a thick rear end portion where the wire retainer 6 is provided, and the thickness is gradually thin and tapered toward the tip.

In order to hold the electric wire a on the clamp body 1, the electric wire a is placed on the curved surface portion 3, and when the wedge 5 fixed thereto is inserted between the side portions 2 and 2, the upper surface of the wedge 5 is A wedge retainer 9 that engages with the sloped surface 8 is provided between both sides 2 and 2 of the clamp body 1 and is pivotally attached to the clamp body 1. The wedge retainer 9 is composed of a plate whose side shape is an isosceles triangle, and the thickness of the plate is approximately equal to the distance between the side portions 2 and 2. The lower surface, which corresponds to the base of the triangle, engages with the sloped surface 8 of the wedge 5. It is a wedge-shaped receiving surface 10 (Fig. 9). The wedge retainer 9 has a through hole 11 near the center of the triangle. The wedge retainer 9 is pivotally attached to the clamp body by bolts 13 that penetrate the hole 11 and the holes 12 of both sides 2 and 2 of the clamp body 1. Has been done.

Reference numeral 14 is a reinforcing plate that covers the outside of the clamp body 1, is formed in a substantially U-shape, and the lower portion is in close contact with the outside of the clamp body 1. The reinforcing plate 14, the clamp body 1, the wedge retainer 9 and the connecting plate 15 are integrated by the bolt 13.

As described above, in the conventional clamp, at the time of assembling the clamp, the clamp body 1, the connecting plate 15, and the wedge retainer 9 are integrally formed by penetrating them with a single bolt 13. This work is carried out on high and unstable towers, but this structure has poor workability and often causes the wedge retainer 9 to fall during assembly. Further, since the connecting plate 15 is made of steel, it is heavy, and the balance of the clamp as a whole is lost after the wedge 5 is attached, and it is necessary to fix the connecting plate 15 to the clamp body 1 side with a small rope or the like. .

Further, in recent years, in order to improve work efficiency, prefabricated overhead wires have become popular, and it has become necessary to pass the draw clamp A ′ to the gold wheel. However, in the conventional product, the width of the clamp main body is larger than the width of the gold wheel inside. , It was difficult for the gold car to pass.

[0008]

[Problems to be solved by the device]

 It has the same strength as before, it does not deteriorate in performance, it can be passed through a gold car, complete prefabricated overhead wire is possible, and the construction time can be shortened, and parts are assembled on the tower. An object of the present invention is to provide a towing clamp that can eliminate the work of handling heavy objects.

[0009]

[Means for Solving the Problems]

 A clamp body 1 formed by bending a plate material into a U-shaped cross-section and having a substantially triangular side surface shape, a wedge 5 having one surface in contact with an electric wire and a sloped surface 8 on the opposite surface, and both lateral sides of the clamp body 1. A wedge retainer 9 having a wedge receiving surface 10 that is pivotally mounted between the portions 2 and 2 and cooperates with a sloped surface 8 of the wedge 5, and a reinforcing plate 14 ′ that covers the clamp body 1 are attached to a bolt 13. In the retaining clamp which has been joined together, the connecting plate 15 'is joined by another bolt 16 while being clamped in the clamp body 1 with respect to the clamp body 1 and the reinforcing plate 14'.

[0010]

【Example】

 An embodiment will be described below with reference to FIGS. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is a bottom view, FIG. 4 is a left side view, FIG. 5 is a right side view, and FIG. 6 is a VI-VI sectional view of FIG.

The detention clamp A of the present invention is also similar to the above-mentioned known example, in which the clamp body 1 is formed by bending a plate made of a metal such as an aluminum alloy so that the cross section perpendicular to the electric wire a is U-shaped and extending in parallel. A semi-cylindrical curved surface that forms a U-shaped bottom by extending 2 and 2 so as to form a substantially right-angled triangle and extending along one of the two sides that sandwich the square of side 2. 3 receives the electric wire a. Therefore, the diameter of the curved surface portion 3, that is, the distance between the side portions 2 and 2 is substantially equal to the diameter of the electric wire a. Since the curved surface portion 3 supports the electric wire a placed along the curved surface portion 3, the portion near the outer end has the guide portion 4 which is bent so that the electric wire emerging from this outer end is not bent at a sharp angle here. is doing.

The wedge portion of the elongated wedge 5 that acts to hold the electric wire a in the clamp body 1 has one surface (the lower surface during use) having a radius substantially equal to the radius of the electric wire a, and the wedge portion is provided on the outer circumference of the electric wire a. It has a wire-engaging surface 7 made of a cylindrical surface on which it can ride, and an inclined surface 8 for performing a wedge action on the opposite side surface (upper surface in use). Because of the sloped surface 8, the wedge 5 has a thick rear end having the wire retainer 6, and the thickness gradually decreases toward the front end.

The electric wire retainer 6 cooperates with the gripping piece 6a to sandwich the electric wire a from above and below, and uses a U-shaped bolt 6b provided on the outside of the gripping piece 6a and a nut 6c which engages with this bolt to hold the electric wire. The wedge 5 can be fixed to the electric wire a by tightening 6 and the gripping piece 6a.

In order to hold the electric wire on the clamp body 1, the electric wire a is placed on the curved surface portion 3, and when the wedge 5 fixed to the electric wire a is inserted between the side portions 2 and 2, the inclined surface of the upper surface of the wedge is formed. A wedge retainer 9 that engages with 8 is provided between both sides 2, 2 of the clamp body 1 and is pivotally attached to the clamp body 1. The wedge retainer 9 is composed of a plate whose side shape is approximately an isosceles triangle, and the thickness of the plate is approximately equal to the distance between the two side portions 2 and 2, and the lower surface corresponding to the bottom of the triangle is the sloped surface 8 of the wedge 5. It is the wedge receiving surface 10 (FIG. 6) that engages. The wedge retainer 9 has a through hole 11 in the vicinity of the center of the triangular shape, and the clamp body 1 is attached to the clamp body 1 by bolts 13 that penetrate the hole 11 and the holes 12 of both side portions 2 and 2 of the clamp body 1. It is pivotally attached.

Reference numeral 14 ′ is a reinforcing plate that covers the outside of the clamp body 1, is formed in a U shape, and is in close contact with the outside of the clamp body 1. The reinforcing plate 14 ', the clamp body 1 and the wedge retainer 9 are integrated by the bolt 13. The reinforcing plate 14 'is shown as one in the figure, but two reinforcing plates 14' may be arranged in parallel.

Reference numeral 15 'denotes a connecting plate, which is sandwiched between the clamp bodies 1 as shown in FIG. 2 and is separated from the bolt 13 by a reinforcing plate 14', the clamp body 1 and another bolt 16 as well. It is pivotally attached. Therefore, the triangular wedge retainer 9 is not connected to the connecting plate 15 '.

(Mounting method) The clamp body 1, the wedge retainer 9, the wedge 5, and the reinforcing plate 14 'are attached to the electric wire a pulled out on the ground, the wedge 5 is pushed in, and a protector (protective metal fitting) is attached (not shown). Make an overhead line. The electric wire a has a mark at the position measured at the time of manufacture, and the mark is the clamp mounting position. At the time of pulling, a wire clamp is attached to the clamp main body 1, and the pulling clamp near the steel tower is attached to the steel tower, and the connecting plate 15 'is attached to the clamp main body 1 by the bolt 16.

[0018]

【effect】

 The clamp body 1 has a U-shape, and a reinforcing plate 14 'having the same cross-section is attached to a part of the clamp body 1 and a dedicated bolt 13 for a mechanical portion for holding the electric wire a and a dedicated bolt 16 for a connecting portion are provided. For this reason, unlike the conventional product, the pushing pressure and the tensile load are not applied to one bolt, and each bolt has its own load, so the size of the bolt can be reduced.

The connecting plate 15 ′ can be attached to the insulator connecting side, and can be connected to the mounting hole of the clamp body 1 after the tightening wire with the bolt 16, which is the heaviest connecting plate 15 ′ of the retractable clamp A ′. Since it can be attached separately, the attachment to the electric wire a becomes easy.

In addition, since the pulling clamp A has the connecting plate 15 'sandwiched in the clamp body 1, the clamp width can be made smaller than the conventional one. , The clamp body can be attached to the wire a and passed.

In this way, since this clamp can be attached to the wire on the ground, there is no need to assemble and disassemble the main body, triangular plate, and wedges at high places and unstable places. It greatly contributes to work and safety.

[Brief description of drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a bottom view of the same.

FIG. 4 is a left side view of FIG.

5 is a right side view of FIG.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a plan view of a known detention clamp.

FIG. 8 is a plan view of the connecting plate.

9 is a sectional view taken along line IX-IX in FIG.

[Explanation of symbols]

 A, A ′ Stretching clamp a Electric wire 1 Clamp body 2 Side part 3 Curved part 4 Guide part 5 Wedge 6 Electric wire retainer 6a Grip piece 6b U-shaped bolt 6c Nut 7 Electric wire engaging surface 8 Gradient surface 9 Wedge retainer 10 Wedge receiving surface 11 Through hole 12 hole 13 bolt 14,14 'Reinforcing plate 15,15' Connecting plate 16 bolt

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Tsuzuki 1-4-2 Hondori, Shizuoka-shi, Shizuoka Chubu Electric Power Co., Inc. Shizuoka Branch (72) Toyoyuki Yuzuki 2-4 Hondori, Shizuoka-shi, Shizuoka No. 1 Chubu Electric Power Co., Ltd. Shizuoka Branch (72) Inventor Shoji Tokita 1-8-1, Hisamoto, Takatsu-ku, Kawasaki-shi, Kanagawa Asahi Electric Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A clamp body (1) formed by bending a plate material into a U-shaped cross section and having a substantially triangular side surface shape.
And a wedge (5) having one surface in contact with the electric wire and a sloped surface (8) on the opposite surface, and the wedge (5) pivotally mounted between both lateral side portions (2, 2) of the clamp body (1). ) The wedge retainer (9) having the wedge receiving surface (10) cooperating with the sloped surface (8) and the reinforcing plate (14 ') covering the clamp body (1) are connected by the bolt (13). In the retention clamp, the clamp body (1)
A wedge type detention clamp, characterized in that it is sandwiched in the clamp body (1) with respect to the reinforcing plate (14 '), and the connecting plate (15') is connected by another bolt (16).