JP2017022904A - Device for preventing snowcap and method for mounting the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for preventing snowcap with simple structure, configured to enable easy installation, low manufacturing cost, and easy removal, and a method for mounting the same.SOLUTION: A device A for preventing snowcap for a cross arm to be used for overhead wire transmission/distribution wire comprises: a plurality of anchor stays 20 placed on an upper surface of a cross arm B; attachment means 30 for fixing the anchor stay to the cross arm, and a cap member 10 which is a plate member bent in a mountain shape along the longitudinal direction and which covers an upper portion between the plurality of anchor stays. Each of the plurality of anchor stays includes a pedestal 23 placed on the cross arm, and a support plate 21 erected upward from the pedestal. On the sides of the multiple support plates, the two side plates of the shade member are supported from the inside.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a snow-carrying prevention device and a mounting method thereof, and more particularly to a snow-carrying prevention device for a brace for overhead wiring of a transmission / distribution electric wire and a mounting method thereof.

Centering on heavy snowfall areas such as Hokkaido and Tohoku, armatures of tower-like structures such as power transmission and distribution facilities are snowing, and there are accidents where the insulator is covered and the voltage is lowered or short-circuited. Such an accident causes a power outage in a wide area. In addition, there is a risk that the arm will be bent by the snow load and damage the equipment.
Therefore, conventionally, in order to remove the snow from the brace, workers have gone up to the scaffolding provided at the height of the tower-like structure and directly scraped off the snow from the brace using a snow shovel such as a long scoop. It was.
However, it is dangerous because the frozen snow can be manually removed from the unstable scaffolding, resulting in poor work efficiency and high work on a narrow scaffold.
In addition, a lot of work was done in inconvenient places such as mountainous areas, so it was very expensive.

In view of this, a snow-carrying prevention device installed on a brace has been proposed.
For example, Patent Document 1 includes a mounting jig that opens and closes via a hinge and surrounds an armature of a steel tower, and a paint or sheet material that has a snow-falling effect is applied to or pasted on a plate-like member. A snow accretion prevention plate, and the snow accretion prevention plate is sandwiched between an attachment surface of a brace and an attachment jig and can be exchanged by opening and closing the attachment jig. Is disclosed.
According to the present apparatus, since it is difficult to apply snow-preventing paint, sheets, or sticking on the ground, the work on the tower only needs to be replaced with a new snow-preventing board. It is said that the above work can be facilitated and the working time can be greatly shortened.

Japanese Patent Laid-Open No. 5-263552

The snow cover prevention device of Patent Document 1 has the following drawbacks.
<1> Since the structure is complicated, installation work is difficult at a high place with little work space, and installation takes time and effort.
<2> Since the structure is complicated and the number of members is large, the manufacturing cost is high.
<3> Since it takes a lot of time to remove it, it has become an obstacle to work when work on the brace is required after attachment.
<4> Since it is necessary to periodically repaint the hard-to-attach snow paint and re-seat the sheet, it took time and effort for maintenance.
<5> Since the upper surface of the brace is flat even after mounting, it is easy for birds to stop on the bracelet or to make a nest, and there is a possibility that a bird strikes a high-voltage line (bird strike) or the like.

An object of the present invention is to provide a snow protection device and a method for attaching the same, which have at least one of the following effects.
<1> The structure is simple and the mounting work is easy.
<2> Manufacturing cost is low.
<3> Removal is easy.
<4> Less maintenance work and costs.
<5> Has a bird damage prevention function.

  In order to solve the above-described problems, a snow-carrying prevention device according to the present invention is a snow-carrying device for an armrest for overhead wiring of a transmission / distribution cable, and includes a plurality of anchor stays placed on the upper surface of the armrest And a mounting means for fixing the anchor stay to the brace, and a cap member that is bent in a mountain shape along the longitudinal direction and covers the upper part between the plurality of anchor stays, Each of the anchor stays includes a pedestal mounted on the armrest and a support plate standing upward from the pedestal, and the two side plates of the cap member on the side of the plurality of support plates from the inside It is characterized by being supported.

  In the snow protection device of the present invention, it is preferable that the support plate has a triangular shape protruding upward from the pedestal.

  In the snow protection device of the present invention, it is desirable to provide two support plates for each of the plurality of anchor stays.

  In the snow protection device of the present invention, it is desirable that the cap member is integrated with the anchor stay.

  In the snow protection device of the present invention, it is desirable to partially separate the pedestal and the arm metal via a spacer formed in the lower part of the pedestal.

  In the snow protection device of the present invention, it is desirable to provide a stepped portion that can be fitted to the upper part of the arm metal on the lower surface of the spacer.

  In the snow protection device of the present invention, it is desirable that the support plate be eccentric from the center of the pedestal to one side in a front view of the anchor stay.

  In the snow protection device of the present invention, it is desirable to provide a peak plate protruding upward on the top side of the shade member.

  The method for attaching the snow protection device of the present invention comprises a step of placing a plurality of anchor stays on the upper surface of the arm metal, a step of fixing the plurality of anchor stays to the arm metal by an attaching means, and a cap on the plurality of anchor stays. And a step of fitting a member to cover an upper portion between a plurality of anchor stays.

Since the snow protection device and the mounting method thereof according to the present invention have the above-described configuration, they have at least one of the following effects.
<1> Since the cap member can be connected with one touch, the mounting operation is easy.
<2> Since the structure is simple, the manufacturing cost is low.
<3> A working space can be secured on the armor simply by removing the cap member.
<4> Since the structure is simple, the maintenance cycle is long, and maintenance work and costs are low.
<5> Since the shade member has a mountain shape and it is difficult for birds to stop, it has a bird damage prevention function.

Explanatory drawing of the snow protection apparatus which concerns on this invention. Explanatory drawing of the snow protection apparatus which concerns on this invention. Explanatory drawing of the snow protection apparatus which concerns on this invention. Explanatory drawing of Example 2 of the snow cap prevention apparatus which concerns on this invention. Explanatory drawing of Example 3 of the snow cap prevention apparatus which concerns on this invention. Explanatory drawing of Example 4 of the snow cap prevention apparatus which concerns on this invention.

The snow crown prevention device of the present invention is an apparatus for installing on a brace of a structure to prevent the snow from falling on the brace. In the following, a power transmission tower is illustrated as a structure, but the structure is not limited to this, and any structure may be used as long as it has a brace-like structure.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a snow-carrying prevention device and a mounting method thereof according to the present invention are described in detail with reference to the drawings.

[Configuration of the present invention]
<1> Overall configuration (FIG. 1).
The snow protection device A according to the present invention includes a shade member 10, an anchor stay 20, and an attachment means 30. The attachment means 30 includes a plurality of anchor stays 20 installed on the upper part of a brace B of the structure. And fixed to the arm metal B, and the upper portion between the plurality of anchor stays 20 is covered with the shade member 10.
In this example, an angle material having an inverted L-shaped cross section is illustrated as the arm metal B, but the present invention is not limited to this, and the arm metal can be applied to an arm metal having another shape as long as it has a flat surface at the top.

<2> Shade member.
The cap member 10 is a member for covering the upper part of the arm metal B and sliding the snowfall downward.
The cap member 10 is a long plate bent in a mountain shape along the longitudinal direction, and has an isosceles triangular cross-sectional shape with an open bottom surface.
In this example, a steel plate in which the cap member 10 is subjected to corrosion prevention processing such as welding galvanization is adopted. However, the present invention is not limited to this, and a synthetic resin plate, an FRP plate, or the like may be employed.
The cap member 10 includes an apex 11 that is a ridge portion bent into a mountain shape, two smooth side plates 12 on both sides of the apex 11, and two fitting portions 13 provided at the lower end of the side plate 12. It has.

<2.1> A fitting part.
The fitting portion 13 is a portion for fitting in a fitting groove 22 of the anchor stay 20 described later and connecting the shade member 10 to the anchor stay 20.
The fitting portion 13 is formed by folding both lower end portions of the two side plates 12 inside the shade member 10. It is desirable that the fitting portion 13 is folded back slightly upward from the horizontal in order to make the fitting with the fitting groove 22 stronger.
In addition, the connection means of the cap member 10 and the anchor stay 20 is not limited to the fitting by the fitting portion 13, and various techniques such as fastening with screws, adhesion, and welding can be employed.

<3> Anchor stay (FIG. 2).
The anchor stay 20 is a member that is placed on the upper part of the arm metal B and connects the cap member 10 to the arm metal B while supporting the cap member 10.
The anchor stay 20 includes a pedestal 23 and a support plate 21 protruding upward from the pedestal 23.
In this example, two support plates 21 and 21 are provided on one anchor stay 20, but the number of support plates 21 is not limited to this.
The two support plates 21 and 21 are substantially parallel to each other with the base 23 interposed therebetween.
The pedestal 23 and the two support plates 21 and 21 can be integrally molded, or can be joined by welding different members.

<3.1> Pedestal.
The pedestal 23 is a base portion of the anchor stay 20 and is a portion that is connected to the upper portion of the arm metal B by the attachment means 30.
The pedestal 23 is a member that crosses the upper part of the arm metal B in the width direction, and two support plates 21, 21 projecting upward are provided at both ends corresponding to the longitudinal direction of the arm metal B.
At both ends of the pedestal 23 corresponding to the width direction of the arm metal B, sandwiching arms 25 and 25 projecting downward are provided. The holding arm 25 is not essential and may be omitted.

<3.1.1> Substructure of pedestal.
A spacer 24 for partially separating the pedestal 23 and the upper surface of the arm metal B is provided at the lower portion of the pedestal 23. In this example, a linear protrusion provided on the bottom of the pedestal 23 is employed as the spacer 24 (FIG. 2).
The spacer 24 has a function of preventing surface contact between the pedestal 23 and the arm metal B and preventing corrosion of the member due to retention of water. The spacer 24 is not essential and may be omitted.

<3.2> Support plate.
The support plate 21 is a plate for supporting the side plates 12 and 12 of the shade member 10 from the inner surface and closing both ends of the shade member 10.
In this example, an isosceles triangular plate having a top portion 21a protruding upward and two side edges 21b and 21b is employed as the support plate 21. However, the shape is not limited to this.
Since the support plate 21 supports the shade member 10 at the side 21b, it is desirable that the support plate 21 have a slight thickness.

<3.3> Fit groove.
The fitting groove 22 is a groove into which the fitting portion 13 of the cap member 10 is fitted.
The fitting groove 22 is provided below the two side edges 21b and 21b of the support plate 21, respectively.
The shape of the fitting groove 22 corresponds to the shape of the fitting portion 13 of the cap member 10. Therefore, it is desirable to form it slightly upward from the side 21 b toward the center of the support plate 21.

<4> Attachment means.
The attachment means 30 is means for fixing the anchor stay 20 to the arm bracket B.
In this example, as the attachment means 30, binding using a commercially available stainless steel band is employed. However, the present invention is not limited to this, and it is possible to employ various techniques such as resin binding bands, steel wire binding, screw fastening, adhesion, and welding.

[Mounting method of snow-prevention device]
Next, a method for attaching the snow protection device A of the present invention will be described with reference to the drawings.

<1> Fixing the anchor stay.
The anchor stay 20 is placed on the upper portion of the arm metal B in such a direction that the top portion 21a of the support plate 21 protrudes upward.
When the pedestal 23 of the anchor stay 20 is placed on the upper surface of the arm metal B, the two holding arms 25 and 25 projecting downward sandwich the both side ends of the arm metal B, so that the anchor stay 20 is stably installed. Can do.
Subsequently, the stainless band of the attachment means 30 is passed between the two support plates 21 and 21 of the anchor stay 20, and the pedestal 23 is fixed to the arm metal B.
Similarly, the anchor stay 20 is fixed to the position corresponding to the other end of the cap member 10 of the armature B.

<2> Installation of the cap member.
The shade member 10 is mounted between the two anchor stays 20, 20 fixed to the arm metal B.
When the cap member 10 is placed over the pair of anchor stays 20, 20, the fitting portions 13, 13 at both ends of the cap member 10 come into contact with both sides 21 b, 21 b of the support plate 21.
When the shade member 10 is pushed down as it is, the fitting portions 13 and 13 slide down along the side edges 21b and 21b, and the bottom portion of the shade member 10 is pushed open.
When the fitting portion 13 reaches the fitting groove 22 of the anchor stay 20, the fitting portions 13 and 13 are pulled inward by the restoring force of the pushed-opened cap member 10, so that the fitting portions 22 and 22 are firmly in the fitting groove 22 and 22. Fitted.
Thus, the snow-carrying prevention apparatus A according to the present invention can attach the cap member 10 to the anchor stay 20 with one touch, so that the installation work efficiency is high.
Further, the arm brace B of the structure is often provided with a protrusion such as a bolt on the upper portion. However, the snow-carrying prevention device A according to the present invention includes the cap member 10 with two anchor stays 20 and 20. Since it is a hollow structure supported by, it can be installed across these protrusions (FIG. 3).

<3> The function of the snow protection device.
The snow-carrying prevention apparatus A according to the present invention distributes snow falling on the structure to both sides at the top 11 of the cap member 10 and slides it downward along the interface of the smooth side plate 12. Snow can be prevented.
Moreover, since the upper part of the shade member 10 consists of the top side 11 and the smooth side plate 12, a bird cannot stay. Therefore, it is possible to prevent accidents of contact with high-voltage lines by birds and nesting. Moreover, it can also be installed in other high-rise facilities, park structures, etc. as a bird damage prevention tool.

[Method for disassembling snow cap prevention device]
Next, a method for disassembling the snow cap prevention device A of the present invention will be described.

<1> Separation of the cap member.
By holding the side plate 12 of the cap member 10 and sliding horizontally along the longitudinal direction of the armature B, one end of the cap member 10 is detached from one anchor stay 20.
Therefore, when the one end of the cap member 10 is lifted upward and slid in the opposite direction, the other end of the cap member 10 is also detached from the anchor stay 20 and the two are separated.
Thus, the cap member 10 can be easily detached from the anchor stay 20 with one hand without using a tool or the like.

<2> Removing the anchor stay.
The binding of the stainless band of the attaching means 30 is released, and the anchor stay 20 is removed from the arm bracket B.

<3> When walking on a bracelet.
When it is necessary to walk on the arm B for inspection, etc., the conventional snow cap prevention device could not secure a walking space without completely disassembling the snow cap preventing device and removing it from the arm B. .
On the other hand, the snow protection device A according to the present invention has a hollow structure in which the space between the two anchor stays 20 and 20 is simply covered with the shade member 10, so that only the shade member 10 is removed from the anchor stay 20, A walking space can be secured on the brace B.

[Example of support for armor with different standards]
Next, another embodiment in which the anchor stay 20 is configured to be applicable to a plurality of types of arm brackets having different standards will be described.
The snow protection device A of this example is fastened to various types of braces smaller than the brace B of the first embodiment by the stepped portion 24a provided on the lower surface of the spacer 24 and the insertion hole 26 provided in the base 23. (FIG. 4).
The step portion 24a is a step for fitting into the upper portion of the small arm metal B. The step portion 24 a is formed by cutting the inner side of the lower surface of the spacer 24 in a stepped manner toward the lower surface of the pedestal 23.
The insertion hole 26 is a hole for inserting the attachment means 30 provided in the base 23. The insertion hole 26 is drilled from a position outside the spacer 24 on the upper surface of the pedestal 23 to the bottom surface of the pedestal 23. When the attachment means 30 is a stainless steel band, the insertion hole 26 is preferably a long hole corresponding to the band shape of the stainless steel band.
In this example, the connection structure of the anchor stay 20 and the arm metal B is changed as shown in the following <1> to <3> according to the standard of the arm metal B.
For convenience of explanation, the arm metal B of the first embodiment is L size, and the smaller arm metal B is M size arm metal B ₁ , S size arm metal B ₂ , and SS size arm metal B _{3 in} descending order.

<1> When used for M size bracelets.
Reference is made to FIG. The M-size bracelet B ₁ has a width of the upper surface that is smaller than the interval between the inner sides of the holding arms 25, 25, but is larger than the interval between the inner side of one holding arm 25 and the spacer 24 on the other holding arm 25 side.
In this case, after placing the anchor stays 20 on arm-B _1, is brought into contact with the inside of one of the clamping Jiude 25 on the side surface of the arm-B _1. Subsequently, by inserting the stainless steel band mounting means 30 into the insertion hole 26 of the other clamping Jiude 25 side and bound together wrapped with the side of the cross-arm 25 abutting thereto and arm-B _1.
This can inner Kyojiude 25 is pressed against the arm-B _1, is firmly connected to the anchor stays 20 in arm-B _1.

<2> When used for S size bracelets.
Reference is made to FIG. Arm-B ₂ S-size, or the width of the upper surface is smaller than the distance between one of the clamping Jiude 25 and the other clamping Jiude 25 side of the spacer 24 is the same as the space between the spacers 24 and 24 which Greater than.
In this case, after placing the anchor stay 20 on the arm metal B ₂ , the stainless steel band of the attaching means 30 inserted through both the insertion holes 26, 26 is wound around the arm metal B ₂ and bound.
Thus, the anchor stays 20 can be firmly connected to the arm-B _2.

<3> When used for SS size bracelets.
Reference is made to FIG. The SS-sized bracelet B ₃ has a width of the upper surface that is smaller than the distance between the step portions 24 a and 24 a of the spacers 24 and 24.
In this case, the upper surface of the arm metal B ₃ is fitted between the two stepped portions 24 a and 24 a, and the stainless band of the attachment means 30 inserted through the two insertion holes 26 and 26 is wound around the arm metal B ₃ and bound.
Thus, the anchor stays 20 can be firmly connected to the arm-B _3.
Incidentally, a small cross-arm from arm-B ₃ of SS size, inner spacer 24, i.e., fixed by fitting to further lower space of stepped portions 24a.

<4> Effects of the present embodiment.
As described above, by designing the gap between the holding arms 25 and 25 according to the maximum standard armband B, it is possible to connect to various smaller armbands.
Therefore, in addition to the effect of the first embodiment, the snow protection device A of the present example has a further effect that one type of anchor stay 20 can cope with various types of arm brackets B having different standards.

[Example of eccentric support plate]
Next, another embodiment in which the support plate 21 is provided eccentric to one side will be described.
In this example, when the anchor stay 20 is viewed from the front, the center line of the support plate 21 is formed eccentric to one side by a distance d from the center line of the base 23 (FIG. 5).
A brace b for reinforcement may be connected to the brace B of the power transmission / distribution facility from the utility pole to the side surface of the brace B.
When the cap member 10 is attached to the anchor stay 20, the lower portion of the cap member 10 is pushed left and right. However, when the brace b is connected to the side surface of the arm metal B, the lower portion of the pushed-up cap member 10 interferes with the side surface of the brace b, so that the cap member 10 cannot be attached to the anchor stay 20.
Even in this case, the support plate 21 of the present example can secure a certain distance between the support plate 21 and the brace b, so that the lower end of the cap member 10 does not interfere with the brace b, and the cap The member 10 can be attached to the anchor stay 20.

[Example of ridge plate provided on top of cap member]
Next, another embodiment in which the peak plate 14 is provided on the top side 11 of the shade member 10 will be described.
In this example, a plate-like ridge plate 14 is projected upward along the top side 11 of the shade member 10.
The peak plate 14 may be formed by welding a plate-like separate member to the top side 11, or may be formed integrally with the shade member 10 by bending the plate material when the shade member 10 is formed (FIG. 6).
In addition to the effect of the first embodiment, the snow protection device A of this example has an effect that the snow protection function is further enhanced because the top side 11 of the shade member 10 is vertically cut by the ridge plate 14.
Moreover, the reinforcement effect of the cap member 10 is also produced. Furthermore, since it becomes more difficult for birds to stay on the shade member 10, the effect of improving the bird damage prevention function is achieved.

A Snow Cover Device 10 Shade Member 11 Top Side 12 Side Plate 13 Fitting Part 14 Peak Plate Part 20 Anchor Stay 21 Support Plate 21a Top Part 21b Side Side 22 Fitting Groove 23 Base 24 Spacer 24a Stepped Part 25 Clamping Arm 26 Insertion Hole 30 Attaching means B Arm, B ₁ Arm, B ₂ Arm, B ₃ Arm, b Brace

Claims (9)

A snow cap prevention device for a bracelet for overhead wiring of power transmission and distribution lines,
A plurality of anchor stays placed on the upper surface of the arm metal;
Mounting means for fixing the anchor stay to the arm;
A plate member bent in a mountain shape along the longitudinal direction, the cap member covering the upper portion between the plurality of anchor stays,
Each of the plurality of anchor stays includes a pedestal placed on the armrest, and a support plate erected upward from the pedestal,
The two side plates of the shade member are supported from the inside by the side of the plurality of support plates,
Snow protection device.   The snow cap prevention device according to claim 1, wherein the support plate has a triangular shape protruding upward from the pedestal.   The snow protection device according to claim 1 or 2, wherein each of the plurality of anchor stays is provided with two support plates.   The snow cap prevention device according to any one of claims 1 to 3, wherein the cap member is integrated with the anchor stay.   The snow protection device according to any one of claims 1 to 4, wherein a part of the pedestal and the arm metal are partially separated via a spacer formed at a lower portion of the pedestal. .   6. The snow protection device according to claim 5, wherein a stepped portion that can be fitted to an upper portion of the arm metal is provided on a lower surface of the spacer.   The snow cover prevention device according to any one of claims 1 to 6, wherein the support plate is provided eccentric to one side from the center of the pedestal in a front view of the anchor stay.   8. The snow protection device according to claim 1, wherein a peak plate protruding upward is provided on a top side of the shade member. A method for mounting the snow-carrying prevention device according to claim 1,
Placing the plurality of anchor stays on the upper surface of the arm metal;
Fixing the plurality of anchor stays to the arm with the attachment means;
Fitting the cap member to the plurality of anchor stays and covering the upper part between the plurality of anchor stays,
How to install the snow protection device.

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