JP2002354646A - Spiral rod slippage prevention device and wind noise preventing cable provided therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slippage prevention device for a spiral rod to reduce wind pressure load and a wind noise preventing cable provided therewith, the device reliably preventing insufficient contact of the rod to the cable as well as slippage of the rod therefrom even when the diameter of the spiral rod is small. SOLUTION: A spiral rod slippage prevention device, whose final shape is cylindrical going around a cable and which is provided with a thin-wall hinge section on one side of opposing sides sandwiching the cylindrical axis and an open section on the other, the open section having a male-female engagement structure, has a groove in the inside perimeter on the radial section between the engagement section and the hinge section to allow the spiral rod to pass through; the prevention device is attached to a cable wrapped with a spiral rod. Also, the final shape may be cylindrical consisting of two half-shells going around a cable, the mating sides having a male- female engagement structure; a groove is provided in the inside perimeter on the radial section between the engagement structures to allow the spiral rod to pass through. The prevention device is attached to a cable wrapped with a spiral rod to provide a wind noise preventing cable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of a spiral rod which winds around an overhead power transmission line to prevent wind noise, and more particularly to a device for preventing a spiral rod from coming off and a wind noise preventing wire provided with the same.

[0002]

2. Description of the Related Art As a countermeasure against wind noise of an overhead power transmission line, there is a method of winding a spiral rod around an electric wire. FIG.
The spiral rod 2 is wound around an electric wire 1, (a) shows an example in which one spiral rod is wound around an electric wire, and (b) shows an example in which two spiral rods are wound diagonally (in a direction of 180 degrees). (C) shows an example in which two spiral rods are closely wound in parallel and wound.

[0003] In any case, when the spiral rod is wound around the electric wire, the inner diameter (envelope inner diameter of the electric wire) of the spiral rod before attachment is set to 80 to 9 times the outer diameter of the electric wire.
By setting the value to 0%, the spiral rod itself grips the electric wire, so that the spiral rod does not come off even if the spiral rod runs on a spiral rod winding part by a spacecraft or the like.

[0004]

As described above, the effect of preventing wind noise can be expected by winding a spiral rod around an electric wire. However, since the wind pressure load increases, the standard size currently used due to insufficient strength of the steel tower is required. There was a place where the spiral rod was not wound. Therefore, in order to reduce the wind pressure load, a method of reducing the diameter of the spiral rod is conceivable. However, the spiral rod may be shifted or come off by passing through a spacecraft.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and a problem thereof is to reduce the wind pressure load. It is an object of the present invention to provide a spiral rod disengagement prevention device which ensures prevention of disengagement and a wind noise prevention electric wire provided with the same.

[0006]

The first means provided by the present invention is a spiral rod disengagement prevention device which has a cylindrical shape having a final shape surrounding an electric wire, and has a thin wall at one of opposed portions sandwiching the cylindrical shaft. An open portion is provided on the other side of the hinge portion, and the open portion has a connection structure by fitting of unevenness, and a groove through which a spiral rod can pass is formed on an inner peripheral surface of an arc-shaped portion between the connection portion and the hinge portion. It has. The present invention also provides a wind noise prevention electric wire in which the spiral rod detachment prevention device is mounted on an electric wire around which the spiral rod is wound.

[0007] The second means provided by the present invention; the spiral rod detachment prevention device, the final shape is a two-part cylindrical shape surrounding the electric wire, and each joint has a joint structure by fitting unevenness, A groove through which the spiral rod can pass is provided on the inner peripheral surface of the arc-shaped portion between the connecting structures. The present invention also provides a wind noise prevention electric wire in which the spiral rod detachment prevention device is mounted on an electric wire around which the spiral rod is wound.

According to the first means and the second means as described above, in order to prevent electric wire wind noise in a place where a standard size spiral rod cannot be applied due to a problem of wind pressure load or tower strength,
The gripping force of the spiral rod is compensated for the electric wire around which the thin spiral rod is wound by the mounting gripping force of the spiral rod disengagement prevention device. Therefore, the spiral rod can be securely mounted on the electric wire around which the spiral rod is wound without being detached even when passing through the spacecraft.

[0009]

FIG. 1 shows a first embodiment embodied based on the first means of the present invention.
(B) shows a spiral rod detachment prevention device, and (C) shows a wind noise prevention electric wire equipped with the spiral rod detachment prevention device.

The spiral rod disengagement prevention device according to the first embodiment has a final shape of a cylinder and has both arc portions 3, 3 '.
A thin hinge portion 3a is provided on one of the opposing portions with the cylindrical shaft interposed therebetween, and an open portion is provided on the other. A structure in which a groove 3b through which a spiral rod can pass is provided on the inner peripheral surface of one of the arc portions 3 between the connecting portions 4, 5 and the hinge portion 3a.

The device for preventing the spiral rod from coming off includes:
At the appropriate position of the wire 1 wound with the spiral rod 2 of the strip, set so as to surround the wire 1 with the arc portions 3, 3 'opened as shown in FIG. By fitting the fitting projection 4 and the fitting recess 5, the spiral rod 2 is fitted into the groove 3b as shown in FIG.
The spiral rod 2 is mounted and gripped on the electric wire 1 in a state where the spiral rod 2 passes, so that the spiral rod 2 floats and is held so as not to come off. Further, since the spiral rod 2 is protected by the inner circumferential groove of the circular arc portion, the performance of the spiral rod is not deteriorated. And can be securely mounted on the electric wire.

FIG. 2 shows a second embodiment embodied based on the first means of the present invention. (A) and (B) show a spiral rod detachment prevention device, and (C) shows this spiral rod. Fig. 2 shows a wind noise prevention electric wire equipped with a detachment prevention device.

The device for preventing the spiral rod from coming off according to the second embodiment is for an electric wire in which the spiral rod 2 is wound in two diagonal lines, has a final shape of a cylinder, and is provided between the two arc portions 3, 3 '. A thin hinge portion 3a is provided on one of the opposed portions sandwiching the cylindrical shaft, and an open portion is provided on the other, and the open portion has a fitting structure of fitting of concave and convex, that is, a fitting convex portion 4 and a fitting concave portion 5. , The connecting portions 4 and 5 and the hinge portion 3a
Are provided with grooves 3b, 3b 'through which spiral rods can pass on the inner peripheral surfaces of both arc portions 3, 3'.

This device for preventing the spiral rod from coming off has two
Wire 1 with spiral rods 2 and 2 wound diagonally
2 at the appropriate position, that is, the arc portions 3, 3 '
In the open state as shown in FIG. 2B, the wire is set so as to surround the electric wire 1 and the fitting protrusion 4 and the fitting recess 5 are fitted to each other to form the groove as shown in FIG. The spiral rod 2 is attached and gripped on the electric wire 1 in a state where one spiral rod 2 passes through 3b and 3b ', whereby the spiral rod 2 floats and is pressed so as not to come off. In addition, since the spiral rod 2 is protected by the inner circumferential groove of the circular arc portion, the performance of the spiral rod is not impaired. And can be securely mounted on the electric wire.

FIG. 3 shows a third embodiment embodied based on the first means of the present invention, wherein (a) and (b) show a spiral rod detachment prevention device, and (c) shows this spiral rod detachment prevention device. Fig. 4 shows a wind noise prevention wire equipped with.

The device for preventing the spiral rod from coming off according to the third embodiment is for an electric wire in which the spiral rod 2 is wound closely in parallel with two strips. The final shape is a cylindrical shape, and the two arc portions 3, 3 'are formed. A thin hinge portion 3a is provided on one of the opposing portions with the cylindrical shaft interposed therebetween, and an open portion is provided on the other. The joints 4 and 5 and the hinge 3
This is a structure having a groove 3c through which the two spiral rods 2 and 2 can pass on the inner peripheral surface of one of the arc portions 3 between "a" and "a".

This spiral rod detachment prevention device has two
Wire 1 with spiral rods 2 and 2 wound tightly
At an appropriate position, that is, the arc portions 3, 3 '
In the open state as shown in (b), the wire is set so as to surround the electric wire 1, and the fitting convex portion 4 and the fitting concave portion 5 are fitted to each other to form the groove as shown in FIG. The spiral rod 2 is attached and gripped on the electric wire 1 in a state where the two spiral rods 2 pass through 3c, whereby the spiral rod 2 is lifted and pressed so as not to come off. Further, since the spiral rod 2 is protected by the inner circumferential groove of the circular arc portion, the performance of the spiral rod is not deteriorated. And can be securely mounted on the electric wire.

FIG. 4 shows a fourth embodiment embodied based on the second means of the present invention, wherein (a) is a spiral rod detachment preventing device, and (b) is equipped with this spiral rod detaching preventing device. Shows the wind noise prevention wire.

The spiral rod disengagement prevention device according to the fourth embodiment has a final shape of a two-part cylindrical shape surrounding the electric wire, and the joints of the separated arc portions 3, 3 'are fitted with irregularities. That is, it has a coupling structure with a fitting convex portion and a fitting concave portion (see the fitting convex portion 4 and the fitting concave portion 5 in the above-described embodiment), and one of the arc portions 3 between the coupling structures.
Has a groove (see the groove 3b in the above-described embodiment) on the inner peripheral surface of which one spiral rod can pass.

This spiral rod detachment prevention device has
At the proper position of the electric wire 1 around which the spiral rod 2 is wound, that is, it is set so that the two arc portions 3, 3 'are surrounded on the electric wire 1, and the two convex portions are fitted. By fitting the recesses, as shown in FIG.
The spiral rod 2 is mounted and gripped on the electric wire 1 in a state where the spiral rod 2 passes through a groove provided on the inner peripheral surface of the one arc portion 3,
The spiral rod 2 floats and is held so as not to come off. Further, since the spiral rod 2 is protected by the inner circumferential groove of the circular arc portion, the performance of the spiral rod is not deteriorated. Without coming off
Can be securely mounted on electric wires.

[0021]

As described above, according to the present invention, even if the diameter of the spiral rod for reducing the wind pressure load becomes small, the spiral rod disengagement prevention device for reliably preventing insufficient adhesion of the rod to the electric wire and preventing disengagement. And the intended problem of providing a wind noise prevention electric wire having the same; the object can be achieved, and the effect can be said to be great.

[Brief description of the drawings]

FIG. 1 shows a first embodiment embodied based on the first means of the present invention. (C) is an explanatory view showing a wind noise prevention electric wire to which the above device is attached.

FIG. 2 shows a second embodiment embodied based on the first means of the present invention, wherein (a) is a cross-sectional explanatory view of a spiral rod detachment prevention device with respect to a wind noise prevention electric wire, and (b) is the device. (C) is an explanatory view showing a wind noise prevention electric wire to which the above device is attached.

FIG. 3 shows a third embodiment embodied based on the first means of the present invention, wherein (a) is a cross-sectional explanatory view of a spiral rod detachment prevention device for a wind noise prevention electric wire, and (b) is the device. (C) is an explanatory view showing a wind noise prevention electric wire to which the above device is attached.

4A and 4B show a fourth embodiment embodied based on the second means of the present invention, wherein FIG. 4A is a cross-sectional explanatory view of a spiral rod detachment prevention device for a wind noise prevention electric wire, and FIG. Explanatory drawing which shows the wind-sound prevention electric wire to which was attached.

5A and 5B show examples of wind noise prevention electric wires, FIG. 5A is an explanatory diagram of an example in which one spiral rod is wound, and FIG. 5B is an explanatory diagram of an example in which two spiral rods are wound diagonally.
(C) is an explanatory view of an example in which two spiral rods are closely wound in parallel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric wire 2 Spiral rod 3 Arc part 3 'Arc part 3a Thin part 3b Groove 3b' Groove 3c Groove 4 Fitting convex part 5 Fitting concave part

Claims (4)

[Claims] A final shape is a cylindrical shape surrounding an electric wire, and a thin hinge portion is provided on one of opposed portions sandwiching the cylindrical shaft, and an open portion is provided on the other, and the open portion is connected by fitting of unevenness. A spiral rod disengagement prevention device having a structure, wherein a groove through which a spiral rod can pass is provided on an inner peripheral surface of an arc-shaped portion between the connecting portion and the hinge portion. 2. A final shape is a cylindrical shape surrounding an electric wire, and a thin hinge portion is provided on one of opposed portions sandwiching the cylindrical shaft, and an open portion is provided on the other, and the open portion is connected by fitting of unevenness. A spiral rod disengagement prevention device having a structure and having a groove through which a spiral rod can pass is provided on an inner peripheral surface of an arc-shaped portion between the coupling portion and the hinge portion, on a wire around which the spiral rod is wound. Wind noise prevention wire characterized by the following. 3. The final shape is a two-part cylindrical shape surrounding the electric wire, and each joint has a joint structure by fitting concave and convex, and an inner peripheral surface of an arc-shaped portion between the joint structures. A spiral rod detachment prevention device having a groove through which a spiral rod can pass. 4. A final shape is a two-part cylindrical shape surrounding the electric wire, and each joint has a joint structure by fitting concave and convex portions, and an inner peripheral surface of an arc-shaped portion between the joint structures. A wind noise prevention electric wire provided with a spiral rod detachment prevention device, wherein the spiral rod detachment prevention device having a groove through which the spiral rod can pass is mounted on the electric wire around which the spiral rod is wound.