JPS645939Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a contact prevention device attached to a power transmission line to prevent electric shock accidents caused by contact with an overhead power transmission line.

[Problems to be solved by this invention]

In recent years, the number of cases in which cranes and the like are used under or near overhead power lines has increased, and as a result, electric shock accidents due to contact with the power lines are also increasing. Particularly in places where electric lines easily blend into the surrounding scenery, electric shock accidents occur frequently because it is difficult to confirm the position of the lines, but few effective measures to prevent these accidents have been proposed or implemented to date.

[Means for solving problems]

The present invention was developed in view of the above, and its purpose is to make the operator of a crane etc. aware of the existence of electric wires, prevent direct contact of the crane boom etc. with the electric wires, and also prevent the electric wires from being surrounded. To provide a contact prevention device for an overhead power transmission line, which prevents an electric shock even if a crane boom or the like comes into contact with a member of the overhead power transmission line.

In order to achieve the above objective, the present invention includes a pair of end-stop guards equipped with an insulating frame that surrounds the outer periphery of the power transmission line except for the upper part, and an intermediate guard having almost the same configuration as the guards, which is suspended from the power line. Furthermore, an insulating chain, rope, or net that surrounds the electric wire is stretched between the insulating frames of each guard to make the presence of the electric wire clear, and the frame, chain, etc. catches objects that approach the electric wire. I have to.

〔Example〕

An embodiment of the device according to the present invention will be described below with reference to the accompanying drawings.

In Fig. 1, symbol A is an electric wire, 1 is a contact prevention device,
The illustrated device 1 includes a pair of opposing end stop guards 2, 2, an intermediate guard 3, and an insulating chain 4 stretched between each guard.

As can be seen from FIG. 4, the end stop guard 2 includes a fixed member 5a, a movable member 5b hinged to the fixed member, a bolt/nut 5c for tightening the members 5a and 5b, and a wire grip for the members 5a and 5b. A clamp 5 consisting of a conductive rubber adapter 5d that is attached to a conductive rubber adapter 5d and brought into contact with an electric wire;
As shown in FIG. 2, a concentrator 7 with a socket 7a is assembled via a connector 6 having a swing fulcrum at a location, and fiber reinforced fibers are arranged radially with one end inserted and fixed into the socket of the concentrator. Plastic (FRP)
It has the same configuration as the clamp 5, and is shown in FIG. As shown in FIG.
It also consists of an FRP support rod 10 that is attached slightly tilted in the length direction of the electric wire and holds the frame 9 in place.

On the other hand, the intermediate guard 3, as shown in FIG.
It consists of a clamp 5, a connector 6, a concentrator 7, a connecting rod 8, and a frame 9, and has almost the same shape as the end stop guard 2 except for the second clamp 5', concentrator 7', and support rod 10. are doing.

The insulating chain 4 is made of ordinary plastic, etc., and is pinned to a clevis portion 9a formed in the frame 9 of the guards 2, 2, and 3 in order to surround the electric wire between each guard, and extends in the circumferential direction. They are installed at regular intervals.

The constituent members 5', 7', and 10 of the end stop guard 2 are provided to prevent the guard from deflecting due to the weight of the chain 4, but a reinforcing portion consisting of these three members may be provided as necessary.

In addition, the conductive adapter 5d of the clamp 5, 5'
The clamp also has the effect of increasing the clamping force, but can be omitted, and the shape and structure of the clamp itself does not matter as long as it can be fixed to the electric wire.

Furthermore, although the connecting rod 8, frame 9, and support rod 10 of the end stop and intermediate guard are made of FRP in order to reduce the weight and ensure strength of the device, they may be made of other insulating materials.

The chain 4 may also be replaced with an insulating rope or an insulating net, and the method of attaching it to the frame 9 is not limited to the pin fixing method.

FIG. 5 shows the usage state of the exemplary device, in which the end stop guards 2, 2 and one or more intermediate guards 3, preferably arranged at equal intervals between them, are shown in FIG.
is suspended from the electric wire A using clamps 5 and 5', and an insulating chain 4 is stretched between the frames 9 of each guard. This device 1 can be assembled in advance on the ground, lifted at a location where it is easy to work, handed to a worker suspended on a wire, and then placed on a pulley attached to the wire and moved. Can be attached to.

The device of the present invention has the effect of making the presence of the electric wire recognizable, but in order to further enhance this effect, it is desirable to color some or all of the components in a color that makes them easy to identify.

In addition, the clamps 5, 5' of each guard and the concentrator 7,
If 7' is made of a light metal such as aluminum, the weight of the device can be further reduced.

Furthermore, if the components of the end stop and intermediate guard, the chain attached to the frame of the guard, etc. are made removable, transportation of the device will be easier.

〔effect〕

The above-described contact prevention device of the present invention does not blend into the background and serves as a sign, so it can prevent contact with objects such as cranes, and its effectiveness is even greater than when it is colored in a highly distinguishable color.

In addition, when an object approaches the wire, end guards, intermediate guards, chains, etc. act as obstacles to prevent the object from coming into direct contact with the wire.In addition, the frame and chain of the guard are made of insulating material. In addition, since the parts are located sufficiently far from the electric wires, there is no fear that current will flow to objects that come into contact with these parts, and therefore, electric shock accidents that conventionally occur can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of the contact prevention device of the present invention, Fig. 2 is a - line thereof, and Fig. 3 is a - line.
FIG. 4 is a front view showing the clamp of the guard, and FIG. 5 is a perspective view schematically showing how the device of the embodiment is used. 1...Contact prevention device, 2...End stop guard, 3
...Middle guard, 4...Insulating chain, 5,5'
... Clamp, 6 ... Connector, 7, 7' ... Concentrator, 8 ... Connecting rod, 9 ... Frame, 10 ... Support rod.

Claims (1)

[Claims for Utility Model Registration] (1) A clamp for gripping electric wires, an insulating connecting rod attached radially to a concentrator connected to this clamp, and a connecting rod fixed to the outer end of the continuous rod to hold the upper part of the electric wire. A pair of end-stop guards each having an insulating frame that surrounds the surrounding area, an appropriate number of intermediate guards that have almost the same configuration as the guards, and an appropriate number of intermediate guards that are inserted between the insulating frames of each guard. A contact prevention device for overhead power transmission lines consisting of a plurality of insulating chains, ropes, or insulating nets wrapped around the electric wires. (2) A second clamp that has the same structure as the end stop guard and is installed at a different position in the length direction of the wire, and a second clamp that is attached to the end stop guard at a different position in the length direction of the wire, and a A contact prevention device for an overhead power transmission line as set forth in claim (1) of the utility model registration claim, characterized in that a reinforcing portion consisting of an insulating support rod is installed at an incline in the horizontal direction to hold the insulating frame in place. . (3) Utility model registration claim 1 or 2, characterized in that each of the guard clamps is provided with a conductive elastic adapter interposed between the gripping portion and the electric wire. Contact prevention device for overhead power transmission lines as described in item ). (4) A statement in any one of claims (1) to (3) of the claims for registration of a utility model, characterized in that at least a part of the component including the guard is colored in a highly distinguishable color. contact prevention device for overhead power transmission lines.