JPH0116334Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a damper for preventing twisting of electric wires.

When snow falls on the upper surface of an electric wire, particularly an overhead electric wire made of stranded metal wires, the snow moves downward along the twisting grooves and adheres to the lower surface of the wire. If this phenomenon is repeated, the snow builds up and adheres to the wires, twisting the wires, and eventually develops into a huge snowdrift, leading to wires being cut and towers collapsing. It comes to cause.

In recent years, one of the means to prevent such an increase in snow accumulation is
As a method, a method of suspending and attaching a twist prevention damper to electric wires to make the wires less likely to twist has become widely adopted.

Conventionally, as this type of torsion prevention damper, the first
As shown in the figure, weights 20 and 30 are provided at both lower ends of the hanging member 10 formed into an inverted U shape, and an electric wire 40 is passed between the weights 20 and 21 and the electric wire 40 is engaged with the upper part of the hanging member 10. However, it is known that this is fixed by winding it with a helical rod such as an armor rod.

However, this torsion prevention damper is
Since the configuration is open between 0 and 21,
If the helical rod breaks, not only will the damper fall, but if the wires swing significantly due to gear locking vibrations, adjacent wires, for example lower phase wires, may be connected to upper phase wires. If the wires cross, the weights 20, 21 of the anti-twist damper attached to one wire to the other wire
Both enter into the inner gap from between the two, and the two become engaged.
The wires cannot return to their original arrangement. In such a case, power transmission etc. will be hindered.

On the other hand, it is conceivable to integrate the two weight parts provided at both lower ends of the hanging material so that no open part is formed at the lower end, but in this case, the electric wire is It is impossible to insert the cable into the inverted U-shaped hanging material from the direction that intersects with the cable, and therefore it becomes impossible to attach it to the installed electric wire.

The present invention improves on these drawbacks, and eliminates the risk of the damper falling even if the helical rod that fixes it to the wire breaks, and also eliminates the risk of the wire vibrating so much that one wire crosses over the other. It is an object of the present invention to provide a damper for preventing twisting of electric wires, which prevents the damper and the electric wires from engaging with each other even in the case of an electric wire.

In order to achieve the above object, the present invention is constructed as follows.

That is, in the present invention, two arms each having a hook part that engages the electric wire at the upper end are arranged facing each other so that the bent part of the hook faces inward and both hook parts are lined up along the longitudinal direction of the electric wire. At the same time, a weight is attached to the lower end of these arms so as to connect them.

Next, the present invention will be explained in detail based on an embodiment shown in FIGS. 2 to 5.

In the figure, 11 and 12 indicate arms.

As shown in FIG. 1, these two arms 11 and 12 are provided with hook portions 13 and 14 at their upper ends for engaging electric wires (not shown). The hook part 13,1
4 includes a bushing 15 made of rubber, synthetic resin, etc.
16 are provided. The bushes 15 and 16 are provided integrally with the hook parts 13 and 14 by molding, and a plurality of protrusions 17 are provided on the outer surface thereof. This protrusion 17 acts as a stopper to prevent the helical rod from moving when the hook portions 13 and 14 are secured to the electric wire by tightening the helical rod or the like.

The arms 11, 12 configured in this way have hook bent portions 18, 1 as shown in FIGS. 2 and 3.
9 facing inward and both hook parts 13 and 14 are arranged facing each other so that they are lined up along the longitudinal direction of the wire,
A weight 20 is attached to the lower ends of these arms 11 and 12.

As shown in FIG. 4, the mounting structure of the weight 20 is such that the lower ends of both arms 11 and 12 are attached by a bolt 21 passing through them and a nut 22 screwed into the bolt 21, and the weight 20 is attached to the lower ends of both arms 11 and 12. 12 are connected to each other.

The degree of tightening between the bolt 21 and nut 22 is
The arms 11 and 12 are designed to be movable in the direction of the arrow in FIG.

Furthermore, springs 23 and 24 are interposed between the arms 11 and 12 and the weight 20, and a split pin 25 is provided outside the nut 22 to prevent the nut 22 from loosening.

Further, the arms 11 and 12 are formed in a symmetrical shape, so that when manufacturing the arms 11 and 12, if only one type is manufactured, the other can be used upside down.

In addition, in this embodiment, the lower ends of the two arms 11 and 12 are separated, and these arms 1
1 and 12 are movably attached to the weight 20, and the arm 1
1, 12 to the electric wire, as shown in FIG. 5, separate the hook parts 3, 4 of the arms 11, 12 from each other, insert the electric wire 40 through this gap, and then rotate the entire damper 90 degrees in the direction of the arrow. Rotate the wire 40
Although the arms 11 and 12 can be engaged with the hook portions 13 and 14, the present invention is not limited thereto, and the arms 11 and 12 may be continuous at their lower ends. When the two arms 11 and 12 are made to have continuous lower ends, the band-shaped metal material is bent into a substantially inverted U-shape, and
A hook portion may be provided at the upper end, and a weight may be provided at the lower end by casting or the like. In addition, in this case, the arm is fixed to the weight, so the arm is made of spring steel or the like, and by pushing the arms apart, a gap is formed between the hook parts in which the electric wire can be inserted. Try to get it.

In addition, the bushes 1 provided on the hook portions 13 and 14
5 and 16 may be omitted depending on the case.

The damper for preventing twisting of electric wires according to the present invention configured as described above has a gap formed between the hook parts 13 and 14, as shown in FIG. The wire is inserted into the wire and engaged with the respective hook portions 13 and 14, and then the wire and the hook portion are wound together with a helical rod and suspended and fixed to the wire.

However, according to the damper for preventing twisting of electric wires of the present invention, two arms each having a hook portion for engaging the electric wire at the upper end are arranged such that the bent portions of the hooks face inward and both hook portions are arranged in the longitudinal direction of the electric wire. Since these arms are arranged opposite to each other so as to be lined up along the same axis, and weights are attached to the lower ends of these arms so as to connect them, the following effects are achieved.

In other words, since both arms and the weight are configured to have a closed ring shape as a whole, even if the helical rod or the like that fixes the torsion prevention damper to the electric wire breaks, there is no risk of the damper falling. , even if the electric wire to which the damper is attached vibrates greatly,
This prevents other electric wires from entering the gap inside the damper and causing both to engage with each other.

Moreover, when attaching the twist prevention damper to an installed electric wire, a gap is formed between the hook parts by pushing the arm apart, and the electric wire is inserted into the gap and engaged with the hook part. Therefore, it is possible to simplify the work of attaching the wire to the electric wire.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional example, Fig. 2 is a front view showing a damper for preventing twisting of an electric wire according to the present invention, Fig. 3 is a left side view of the same, Fig. 4 is an enlarged sectional view of the same main part, Fig. 5 is an explanatory diagram illustrating a usage example. 11, 12... Arm, 13, 14... Hook portion, 15, 16... Bush, 17... Projection, 1
8, 19... Hook bending part, 20... Weight, 21
... Bolt, 22 ... Nut, 23, 24 ... Spring, 25 ... Cotter pin, 40 ... Electric wire.

Claims (1)

[Scope of utility model registration request] Two arms each having a hook portion for engaging an electric wire at the upper end are arranged facing each other so that the bent portion of the hook faces inward and both hook portions are lined up along the longitudinal direction of the electric wire. A damper for preventing twisting of electric wires, characterized in that a weight is attached to the lower end so as to connect the two.