JPS6328493Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention places a hanging wire along the cable,
The present invention relates to an overhead cable with a suspension wire in which the cable is supported by the suspension wire.

Overhead cables with hanging wires are generally used as self-supporting cables in overhead communication cables and the like. Conventional overhead cables with hanging wires are classified into daruma-type self-supporting cables, wrapped-type self-supporting cables, and bind-type self-supporting cables based on the structure in which the cables are supported on the hanging wires, but all of them are resistant to snow accretion. In this respect, it has a structural drawback.

For example, as shown in FIG. 1, in the Daruma type self-supporting cable, hanging wires 11 are arranged parallel to a cable core 10, and the outer periphery of these wires is connected to a neck portion 12.
The cable core 1 is attached to the suspension wire 11 by integrally covering it with a common jacket 13 of plastic.
It is configured to support 0. When this Daruma-shaped self-supporting cable is installed as an overhead line, the cable is twisted in order to reduce vibrations caused by wind. For this reason, snow adheres to the concave portion formed by the neck 12, and this adhered snow gradually rotates downward and along the twisted direction, depending on the height difference of the overhead wire condition. . Therefore, snow accretion tends to grow.

As shown in FIG. 2, the wrapped self-supporting cable has a cable core 10 and a suspension wire 11 covered with their own plastic sheaths 14, 14', and a cable body 15 surrounding the coated suspension wire 16. The cable main body 15 is supported by the suspension wire 16 by winding the cable at a predetermined pitch. However, in this case as well, since there is a recess between the hanging wire 16 and the cable main body 15 and the cable has a twisted structure, snow accumulation cannot be avoided, as in the case of the Daruma-shaped self-supporting cable.

Bound self-supporting cables also have a unique plastic jacket 1, as shown in FIG.
4, 14' and the suspension wire 16 are arranged in parallel, and the outer surface of the cable body 15 is tied with one or more binding wires.
It is configured to support the cable main body 15 at the same time. However, also in this case, the cable body 15
Since there is a recessed portion between the overhead wire 16 and the overhead wire 16, snow tends to adhere to this recessed portion, and the adhered snow moves downward depending on the height difference in the condition of the overhead wire. Then, the movement temporarily stops at the intersection between the recess and the binding line, but due to the weight of the snow, it then moves along the twisting direction of the binding line, and the snow grows while gradually rotating and moving.

In this way, all conventional overhead cables with suspension wires have a cable main body 15 and a covered suspension wire 16.
Since there is a recess between the two, it is easy for snow to adhere to it. In addition, in the state of the overhead wire, the outer surface of each wire has a spiral structure, and there is a drawback that the snow that has adhered to the wire is likely to rotate and grow.

For this reason, when installing overhead lines in snowy and cold regions,
There was a risk that snow adhering to the cable would rotate and grow, developing into a pipe of snow and causing a disconnection accident.

This invention was made in view of the above-mentioned circumstances, and the object is to provide an overhead cable with a suspension wire that is difficult to attract snow and has a structure that prevents the snow from rotating and growing.

This invention will be explained below with reference to embodiments of the drawings. FIG. 4 shows its structure, in which suspension wires 16 covered with the cable body 15 are arranged in parallel with a predetermined interval L between them. The cable body 15 is made by covering the cable core 10 with a plastic jacket 14. The covered suspension wire 16 also includes a plastic sheath 1 surrounding the suspension wire 11.
4'. The cable main body 15 and the hanging wire 16 are spaced apart from each other by a certain distance P.
They are connected and fixed to each other by a connecting member 17 provided for each, and are integrated. The connecting member 17 is constructed in the shape of a brim by plastic injection molding, and has a through hole formed therethrough that passes through the cable body 15 and the hanging wire 16.
The outer peripheral surface is formed of, for example, a straight line and an outwardly convex curve. The connecting member 17 may be configured with only an outwardly convex curve, or the cable body 15 may be configured as appropriate.
and the plastic sheathing 14, 14' of the hanging wire 16.
It may be formed integrally with. That is, the connecting member 1
Reference numeral 7 connects and fixes the cable body 15 and the suspension wire 16 to each other and forms a convex portion in the circumferential direction of the plastic sheaths 14 and 14'.

In the overhead cable with suspension wire configured in this way, a predetermined interval L is provided between the cable main body 15 and the covered suspension wire 16, which are arranged in parallel, so that a recess that causes snow accumulation is formed. Not done.
Therefore, compared to conventional cables of this type, snow is less likely to adhere to them. In addition, because the connecting member 17 forms convex portions at regular intervals P in the cable main body 15 and the hanging wire 16 in the longitudinal direction, these convex portions act as a barrier and prevent snow from adhering to the cable's overhead line. According to the difference, downward movement is prevented. Therefore, the possibility that snow deposits will grow and become large is extremely reduced.

In addition, as shown in FIG. 5, at opposing positions of the plastic jacket 14 of the cable body 15,
By providing the pair of protrusions 18, 18', rotational growth of snow within a certain distance P can be prevented, and the effect of preventing snow from accreting can be further improved. In this case, the plastic sheath 14' of the hanging wire 16 may also be provided with a pair of protrusions.

Furthermore, in the embodiment described above, the connecting member 1
7 is formed by a plastic in-die extension mold, and the plastic jackets 14 and 1 are directly attached to each other.
4', but the present invention is not limited to this. For example, as shown in FIG. 6, two plastic fixing pieces 19 and 19', or 20 and 20', with holes formed in advance corresponding to the shapes of the cable body 15 and the hanging wire 16, are used. It is also conceivable to configure it so that it is attached and fixed at regular intervals P.

As explained above, according to the overhead cable with suspension line of this invention, it is difficult for snow to adhere to it, and it also prevents the adhered snow from moving downward and becoming thicker, which reduces the possibility of snow accumulation developing into pipe snow. becomes extremely small. Therefore, even if the overhead wire is installed in a snowy and cold region, the risk of disconnection due to snow accumulation can be effectively resolved.

[Brief explanation of the drawing]

FIGS. 1 to 3 are drawings showing the configuration of a conventional overhead cable with a suspension line, respectively, in which a is a cross-sectional view thereof, b is a view seen from the side, and FIG.
Drawings showing the configuration of an overhead cable with a suspension wire according to an embodiment of this invention, a is a cross-sectional view thereof, b is a view seen from the side, and FIG. 5 is a diagram showing another embodiment of this invention. 6a is a sectional view thereof, b is a side view thereof, and FIGS. 6a and 6b are front views showing other examples of the connecting portion formed by this invention. 10... Cable core, 11... Hanging wire, 13,
14, 14'... Plastic jacket, 15... Cable body, 16... Covered hanging wire, 17... Connecting member, 18... Projection, 19, 19', 20, 20'...
...Indicates a plastic fixing piece.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A suspension wire having a plastic jacket and a cable body having a plastic jacket are arranged in parallel with a predetermined interval, and the suspension wire and the cable body are arranged in parallel in the length direction. Plastic connecting members are provided at regular intervals to integrally connect the cables, and the connecting members have a brim shape with a through hole passing through the suspension wire and the cable body, and the outer circumferential surface is at least a straight line and an outwardly convex curve. An overhead cable with a hanging wire, characterized by being composed of. (2) The overhead cable with hanging wire according to claim 1, wherein the plastic connecting member is integrally formed with the hanging wire and the plastic jacket of the cable main body by injection molding. (3) The overhead cable with hanging wire according to claim 1, wherein the plastic connecting member is constructed by adhering a pair of fixing pieces that are molded in two parts along a line that connects the through holes, facing each other.