JPH028491Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a messenger wire retaining clamp that holds only a messenger wire guided in a plurality of bundled covered power distribution wires.

Recently, with the development of covered electric wires, attempts have been made to use a simplified power distribution system in which a plurality of (for example, three) covered electric wires and one messenger wire are bundled together and overhead wires are used. In this case, when pinning a part of multiple covered wires to a support such as a building or utility pole, pull out one mesenger wire from the bundled wires without directly pinning the covered wires. It is designed so that it can be secured to a retaining metal fitting (clamp). However, at present, there is no suitable clamp for holding only the horizontally protruding messenger wire, and it is hoped that such a clamp will appear as soon as possible.

The present invention provides a retaining clamp for retaining only the extended messenger wire together with the covered electric wire in the above-mentioned simple power distribution system.

That is, the present invention provides a messenger wire in which a pair of pinch-type clamp bodies with a built-in tightening piece for clamping the messenger wire and a pair of hanger fittings are tightened by tightening bolts arranged on four sides. It is a retaining clamp.

Hereinafter, the present invention will be described with reference to drawings of embodiments.

Reference numeral 1 denotes a synthetic resin clamp body which is divided into a pair of horizontal halves, and each clamp part 1 of the clamp body 1 is
It is made of metal (aluminum) and has a wire receiving groove 4 in which a large number of screw groove-shaped locking strips 3 orthogonal to the line direction are arranged in the fitting grooves 2, 2 formed in the opposing surface parts 1c, 1c of a, 1b. The tightening piece 5 has anti-slip wings 5a on both sides of the center, a locking ridge 5b on the bottom, and a fitting groove 2.
It is adapted to fit into the side receiving step portion 2a and receiving ridge 2b, respectively. Further, bolt insertion holes 6 are bored on all sides of the clamp body 1. In this case, the bolt insertion holes 6 at diagonal positions of each clamp part 1a, 1b are simply holes 6a, and the remaining bolt insertion holes 6 at diagonal positions have grooves 6b and grooves 6c on opposite sides. Become. Reference numeral 7 designates a pair of hanger metal fittings, each of which has a fitting stepped portion 8 having a fitting width for the clamp body at its base end, and bolt holes 9 are provided on all sides of the fitting stepped portion 8.
I wear it. In this case, among the bolt insertion holes 6 of the clamp body 1, the bolt holes 9 at positions corresponding to the simple holes 6a are provided with threaded grooves 9a, and the bolt holes 9 corresponding to the other threaded grooves 6b are provided with simple holes 9a,
The tightening bolt 10 passing through the bolt hole 9 of the hanger fitting 7 and the bolt insertion hole 6 of the clamp body 1 has a nut-free tightening structure. Reference numeral 11 denotes a thin sponge-like cushioning mat impregnated with a compound interposed between the opposing surfaces of the clamp body 1. 1
Reference numeral 6 denotes a reinforcing bulge formed on the hanger fitting 7.

When using this retaining clamp, first tighten the tightening bolts 10 that fasten the four sides of the clamp body 1.
, the clamp parts 1a and 1b of this clamp body 1
loosen so that they separate. That is, the four tightening bolts 10 are made into a set of two at diagonal positions, and the bolt head 10a is positioned from the simple hole 9a side of the bolt hole 9 of one hanger fitting 7, and the threaded portion 10b at the tip
the screw groove 9 of the bolt hole 9 of the other hanger fitting 7.
Since it is configured to be screwed into the screw groove 9
If the tightening bolt 10 screwed into b is screwed back and pulled, at least the tightening bolt 10 will fit into the thread groove 9.
It can be easily removed from the clamp portion 1a or 1b on the b side. However, this pull-out tightening bolt 10 is inserted into the bolt insertion hole 6 of the clamp portion 1b or 1a on the base end side.
Since the screw grooves 6b are arranged in the parts, when the clamp parts 1a and 1b are separated, the hanger fittings 7 and 7 are removed at once.
are never separated.

Here, only the messenger wire 13 formed in a bundle together with a plurality of covered power distribution wires 12 is extended laterally, and the clamp portion 1a, which separates the messenger wire 13,
The wire is passed between the semicircular arc-shaped wire receiving grooves 4, 4 of the tightening pieces 5, 5 on the opposing surfaces of the wire 1b.
In this case, when the messenger wire 13 itself is a covered electric wire, the sponge-like buffer mats 11, 1 are used to prevent the coating layer from separating from the core wire.
The messenger wire 13 is made to face the wire receiving grooves 4, 4 position with the wire receiving grooves 1 interposed on both sides.

Also, when the messenger wire 13 has a bare thick wire configuration, this sponge-like buffer mat 11,
11 is peeled off from the surface of the tightening piece 5, 5, and is exposed directly to the wire receiving grooves 4, 4 (normally, this type of messenger wire is a thick wire when using bare wire, and is coated with a thick wire). When using a line, it appears as a thin line).

After that, in the opposite manner to the above, if the tips of the four tightening bolts 10 are passed through the opposing clamp part 1a or 1b and screwed into the threaded groove 9b of the bolt hole 9 of the hanger metal fitting 7 located on the back thereof, the center The messenger wire 13 arranged on both sides of the locking strip 3, which is threaded in the wire receiving grooves 4, 4 of the clamping pieces 5, 5,
3 is bitten and gripped, so it is clamped without sliding in the tension direction. In this case, when the messenger wire 13 is a covered wire, the sponge-like buffer mat 11 is interposed between the messenger wire 13 and the tightening piece 5, so that the tightening piece 5 is made of metal. The locking strips 3 do not strongly grip only this coating layer, so that this coating layer and the internal core wire do not separate (there is no straining phenomenon).

Thereafter, by hooking the retaining bolt 14 placed at the tip of the hanger fitting 7 onto the hook 15 attached to the support (not shown), the entire messenger wire 13 is installed to the support. The state will be as follows. Therefore, this messenger wire 1
3 is extended as a wire bundle that is twisted together with the plurality of covered wires 12 groups, so that the covered wires 12 groups are also substantially installed on the support side. Of course, this messenger wire 13 itself uses a robust wire that can withstand the load of the other covered wires 12 groups.

As mentioned above, the wire retaining clamp of the present invention consists of a pair of horizontally split clamp bodies each having a clamping piece provided with a wire receiving groove with a locking strip on opposing surfaces, and a clamp body. By configuring the hanger metal fitting to be tightened with four tightening bolts, the messenger wire interposed between the pair of tightening pieces can be securely gripped. In this case, the clamp body is made of synthetic resin to reduce weight, but the clamping piece that directly clamps the wire is made of a metal member (aluminum) to provide the desired gripping force. Of course, the messenger wire at this time may be either a bare wire or a coated wire. However, when using messenger wire as a covered wire, a cushioning material (sponge-like cushioning mat) is laid to protect the covering layer so that the gripping force does not directly affect only the covering layer. Further, the retaining clamp of the present invention is an assembly type with a simplified structure and does not require a nut, so it is easy to handle and can be tightened with a single tightening tool such as a spanner. In addition, since the tightening piece and the clamp part have a concave-convex engagement, there is no risk that only the core of the tightening piece will slide out even if tension is applied, making it durable for long-term use. This has practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a slope view, Fig. 2 is a front view, and Fig. 3 is a cross-sectional view of Fig. 1 A-A.
4 is a perspective view of the clamp body separated; FIG. 5 is a perspective view of the clamp section; FIG. 6 is a perspective view of the tightening piece; FIG. 7 is a perspective view of the clamp body as seen from the bottom; Figure 8 is a slope view showing the state of use, Figure 9 is an explanatory diagram of the tightened state when using the sponge-like cushioning mat,
FIG. 10 is a partially cutaway explanatory view seen from the side. 1... Clamp body, 1a, 1b... Clamp part, 2... Fitting groove, 3... Locking strip, 4... Wire receiving groove, 5... Tightening piece body, 6... Bolt insertion hole,
7... Hanger metal fittings, 14... Retaining bolt.

Claims (1)

[Scope of utility model registration request] A wire receiving groove with a locking line orthogonal to the track direction is provided on the opposing inner surface, and anti-slip wings are provided at both ends of the center.
Forms a pair of tightening pieces with locking ridges on the back,
The tightening piece body is fitted into the fitting grooves on the opposing inner surfaces of a pair of horizontally split clamp bodies, and the upper and lower surfaces of the clamp bodies are fitted into the fitting steps provided at the base ends of the pair of hanger fittings, respectively. A tightening bolt that is inserted into the four sides of the fitting stepped portion passes through the clamp body and is screwed onto the hanger metal fitting on the back to tighten it, and a retaining bolt is attached to the tip of the hanger metal fitting. clamp.