JP2010226824A - Utility pole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a utility pole capable of preventing electric cables from being cut by a falling tree. <P>SOLUTION: The utility pole (10) includes a utility pole body (30) provided on the ground (70), an arm (31) provided on the utility pole body (30), and an insulator (40) provided on the lower surface of the arm (31). An electric cable (20) is supported on the insulator (40) by a winding bind (50), and the winding bind (50) is forme have a fixing strength enough to be cut by the load of a falling tree. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a utility pole, and more particularly to a utility pole that can prevent an electric wire from being cut by a fallen tree.

Conventionally, high-voltage line damage due to fallen trees has been much in mountainous areas. That is, the ground is loosened due to rainfall or snowfall and a large tree falls, and the fallen tree is caught by the high-voltage line, and the high-voltage line is cut.
As such a countermeasure, as shown in FIG. 8, a fallen tree guard wire provided at the upper part of the utility pole 130 is known. In this fallen tree guard wire, a wire 135 is stretched between the high-voltage line 120 and the trees 60 between the adjacent power poles 130 and 130 ′. According to the fallen tree guard wire, when the tree 60 falls down, the tree 60 leans against the wire 135, so that the high voltage line can be protected.

  However, in this fallen tree guard wire, since the electric pole 130 supports the wire 135, the electric pole 130 may fall down due to the load of the tree 60 leaning on the wire 135.

  An object of this invention is to provide the utility pole which can prevent that an electric wire is cut | disconnected by fallen trees etc.

  The present invention is an electric pole for supporting an electric wire, comprising an electric pole main body provided on the ground, an arm provided on the electric pole main body, and an insulator provided on a lower surface of the arm wooden, the electric wire being The fixing member is supported by the insulator, and the fixing strength of the fixing member relates to a utility pole that is cut by a load of wood.

According to this invention, the electric wire is supported on the insulator by the fixing member, and the fixing strength of the fixing member is set to such an extent that it can be cut by the load of the wood.
Therefore, when the tree falls down and leans on the electric wire, the fixing member is cut by the load of the tree, and the electric wire falls without being disconnected.
Therefore, the electric wire can be prevented from being cut by a fallen tree or the like.

  The fixing member includes a substantially C-shaped insulator fixing portion wound around the insulator, and a spiral portion extending spirally from both ends of the insulator fixing portion to both sides and wound around the electric wire. Is preferred.

Moreover, it is preferable that the said fixing member is a metal wire, and at least one part is the fixed intensity | strength of the grade cut | disconnected by the said wooden load.
Therefore, it can be cut at any part.

  In addition, it is preferable that a plurality of the arms are provided at different heights in the utility pole body, and the insulators are arranged so as not to overlap in a substantially vertical direction.

  According to the present invention, the insulators are arranged so as not to overlap in the substantially vertical direction. Therefore, even if the electric wire supported by the upper insulator is dropped, the electric wire can be prevented from being caught by the electric wire supported by the lower insulator.

  ADVANTAGE OF THE INVENTION According to this invention, an electric wire can be supported and it can prevent that an electric wire is cut | disconnected by impacts, such as a fallen tree. Therefore, it is possible to prevent the electric wire and the utility pole from being damaged by typhoons, wind and snow, and the like.

It is a figure which shows the utility pole which concerns on embodiment of this invention. It is an expansion perspective view which shows the insulator and fixing member which comprise the utility pole which concerns on embodiment of this invention. It is a top view which shows the fixing member which comprises the utility pole which concerns on embodiment of this invention. It is a figure which shows the state in which the tree fell to the utility pole which concerns on embodiment of this invention. It is a figure which shows the state by which the fixing member which comprises the utility pole which concerns on embodiment of this invention was cut | disconnected. It is an expansion perspective view which shows the insulator and fixing member which comprise the utility pole which concerns on 2nd Embodiment. It is a figure which shows the utility pole which concerns on 3rd Embodiment. It is a figure which shows the utility pole of a prior art example.

Hereinafter, a first embodiment for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a utility pole 10 according to an embodiment of the present invention.
As shown in FIG. 1, the utility pole 10 supports the electric wire 20.
The utility pole 10 includes a utility pole main body 30 provided on the ground 70, an arm 31 provided on the utility pole main body 30, an insulator 40 provided on the lower surface of the arm 31, and an electric wire 20 fixed to the insulator 40. And a winding bind 50 as a fixing member that supports 20.

  The utility pole body 30 is formed in a long pillar shape, and stands upright in a substantially vertical direction. The arm 31 is formed in an elongated shape having a rectangular cross section, and is fixed in the vicinity of the upper portion of the utility pole main body 30 so that the arm 31 is substantially horizontal at a substantially central position in the length direction of the arm 31.

FIG. 2 is an enlarged perspective view of the lever 40 and the winding bind 50.
The insulator 40 is fixed near the tip of the arm 31 so as to be the lower surface of the arm 31. The insulator 40 includes a base shaft 42 standing downward from the arm 31 and an insulator body 41 fixed to the tip of the base shaft 42 and formed in a substantially cylindrical shape. A concave groove 43 is formed in the vicinity of the distal end of the insulator main body 41 along the outer periphery of the insulator main body 41 so that the electric wire 20 can be held in the groove 43. The insulator body 41 is made of an insulating ceramic material.

  As shown in FIG. 2, the lever fixing portion 51 of the winding bind 50 is fitted into the groove 43 of the lever 40 attached to the arm 31, and the spiral portions 52, 52 extending on both sides of the lever fixing portion 51 are respectively connected to the ends. The electric wire 20 is fixed to the insulator 40 by being wound around the electric wire 20.

FIG. 3 shows a plan view of the winding bind 50.
The winding bind 50 includes a substantially C-shaped insulator fixing portion 51 that is wound around the groove 43 of the insulator 40 and a spiral portion 52 that extends spirally from both ends of the insulator fixing portion 51 to both sides and winds around the electric wire 20. 52.

  The insulator fixing portion 51 and the spiral portion 52 are made of synthetic resin, can support the electric wire 20 on the insulator 40, and have a fixing strength enough to be cut by the load of the fallen tree, that is, the insulator is fixed by the load of the fallen tree. The portion 51 is formed of a material having a tensile strength enough to be cut.

  As shown in FIG. 4, when a tree 60 near the utility pole 10 falls over the electric wire 20, the winding bind 50 supporting the electric wire 20 is cut and the electric wire 20 is dropped to drop the tree. It is used to prevent the electric wire 20 from being cut by a load of 60.

  Next, an operation when a tree falls on the utility pole 10 according to the first embodiment of the present invention will be described.

  As shown in FIG. 4, when a tree 60 near the utility pole 10 falls due to a typhoon or wind and snow, and the fallen tree is caught on the electric wire 20, as shown in FIG. 5, due to the impact when the fallen tree is caught on the electric wire 20. Then, the winding bind 50 is cut and the support of the electric wire 20 with respect to the insulator 40 is released. Therefore, only the electric wire 20 falls.

According to the utility pole 10 which concerns on 1st Embodiment which has the structure mentioned above, the following effects are show | played.
(1) The electric wire is supported on the insulator by the fixing member, and the fixing strength of the winding bind 50 is set to such an extent that it is cut by the load of the tree 60.
Therefore, when the tree 60 falls down and leans against the electric wire 20, the winding bind 50 is cut by the load of the tree 60, and the electric wire 20 falls without being disconnected. Therefore, the electric wire 20 can be prevented from being cut by a fallen tree or the like.

Next, a second embodiment will be described with reference to FIG.
FIG. 6 is an enlarged perspective view of the insulator 40 and the metal wire 50a of the second embodiment.
The configuration of the utility pole of the second embodiment is basically the same as the configuration of the utility pole of the first embodiment.
However, in the utility pole of 2nd Embodiment, it is comprised with the metal wire 50a instead of the winding binding 50 as a fixing member. At least a part of the metal wire 50 a has a fixing strength that is cut by the load of the tree 60.

  The metal wire 50a is formed of a wire made of a metal material having corrosion resistance such as a hard steel wire, an aluminum wire, or a titanium wire. The metal wire 50a can support the electric wire 20 on the insulator 40 and has a fixing strength enough to be cut by a fallen tree load, i.e., a tension that can cut at least a part of the metal wire 50a by the fallen tree load. It is formed of a material having strength.

  Next, the operation when a tree falls on the utility pole 10 according to the second embodiment of the present invention will be described with respect to differences from the first embodiment.

  When the tree 60 near the utility pole 10 falls down due to a typhoon or wind and snow, and the fallen tree is caught by the electric wire 20, at least a part of the metal wire 50 a is cut by the impact when the fallen tree is caught by the electric wire 20. The support for 20 levers 40 is released. Therefore, only the electric wire 20 falls.

  According to the utility pole 10 which concerns on 2nd Embodiment which has the structure mentioned above, the following effects are show | played.

  (2) The fixing member is formed of the metal wire 50a, and at least a part thereof has a fixing strength enough to be cut by a load of wood. Therefore, it can be cut at any part.

Next, a third embodiment will be described with reference to FIG.
The configuration of the utility pole of the third embodiment is basically the same as the configuration of the utility pole of the first embodiment.
However, in the utility pole of the third embodiment, instead of providing a plurality of insulators 40 in one arm 31, as shown in FIG. 7, the arms 31 a, 31 b, 31 c have different heights in the utility pole body 30 a. A plurality of insulators 40a, 40b, and 40c are different in that they are arranged so as not to overlap in a substantially vertical direction.

  As shown in FIG. 7, each arm 31a, 31b, 31c is formed in different lengths, and is spaced from the upper part of the utility pole body 30a by a predetermined distance to the utility pole body 30a so as to have different height dimensions. Fixed. Each arm 31a, 31b, 31c is fixed so as to be substantially horizontal. The arm 31a provided at the upper part of the utility pole body 30a is formed longer and the arm 31c provided at the lower part of the utility pole body 30a is formed shorter.

  The insulators 40a, 40b, and 40c are fixed so as to be the lower surfaces of the arms 31a, 31b, and 31c in the vicinity of the distal ends of the arms 31a, 31b, and 31c. At this time, each insulator 40a, 40b, 40c is arrange | positioned so that it may not overlap in a perpendicular direction.

  Next, the usage state of the utility pole 10 according to the third embodiment of the present invention will be described with respect to differences from the first embodiment.

  A plurality of arms 31a, 31b, 31c are provided at different heights in the utility pole body 30a. And each insulator 40a, 40b, 40c is fixed to each arm 31a, 31b, 31c so that it may not overlap in a perpendicular direction.

  When the tree 60 near the utility pole 10a falls down due to a typhoon or wind and snow, and the fallen tree is caught by the electric wires 20a, 20b, and 20c, the winding bind 50 is caused by an impact when the fallen tree is caught by the electric wires 20a, 20b, and 20c. And the support of the electric wires 20a, 20b, and 20c with respect to the electric insulators 40a, 40b, and 40c is released.

  Therefore, when a strong load is applied to the electric wires 20a, 20b, 20c so that the electric wires 20a, 20b, 20c are cut by a fallen tree or the like, the electric wires 20a, 20b, 20c and the insulators 40a, 40b, The supporting state with 40c is released, and only the electric wires 20a, 20b, and 20c are dropped downward.

According to the utility pole 10a which concerns on 3rd Embodiment which has the structure mentioned above, the following effects are show | played.
(3) The insulators were arranged so as not to overlap in a substantially vertical direction. Therefore, even if the electric wire supported by the upper insulator is dropped, the electric wire can be prevented from being caught by the electric wire supported by the lower insulator. Therefore, the electric wires 20a, 20b, and 20c can be reliably dropped, and the electric wires 20a, 20b, and 20c can be prevented from being cut by an impact of a fallen tree or the like.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

  For example, the fixing member is cut by a wooden load, but is not limited thereto. What is necessary is just to make it cut | disconnect before the load by which an electric wire is cut | disconnected, and you may cut | disconnect by the load of the snow accumulated on the electric wire.

  Further, for example, the insulator fixing portion 51 constituting the winding bind 50 is made of synthetic resin and is cut by a fallen tree load, but is not limited thereto. For example, the winding binding is provided with a coupling portion that performs coupling or separation according to the tensile strength, and separation is performed according to the load of the fallen tree applied to the electric wire, thereby fixing and releasing the insulator at the coupling portion. You may make it perform.

10 Electric pole 20 Electric wire 30 Electric pole main body 31 Arm 40 40 Insulator 41 Insulator main body 50 Winding bind

Claims (4)

A utility pole that supports the wire,
A power pole body provided on the ground;
Arms provided on the main pole body,
An insulator provided on the underside of the arm,
The electric wire is supported by the insulator by a fixing member,
The electric pole characterized by the fixing strength of the said fixing member being a grade cut | disconnected by the load of a tree | wood.   The fixing member includes a substantially C-shaped insulator fixing portion that is wound around the insulator, and a spiral portion that spirally extends from both ends of the insulator fixing portion to both sides and is wound around the electric wire. The utility pole according to claim 1.   The utility pole according to claim 1, wherein the fixing member is a metal wire, and at least a part thereof has a fixing strength enough to be cut by a load of the wood. A plurality of the arms are provided at different heights in the utility pole body,
The utility pole according to claim 2 or 3, wherein the insulators are arranged so as not to overlap in a substantially vertical direction.

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