JP7180484B2 - Bird damage prevention tool - Google Patents

Description

The present invention relates to a bird damage prevention device.

When birds such as crows build their nests on facilities installed on utility poles, bird damage occurs such that bird droppings adhere to the electric poles. Also, for example, if a crow carries a wire or the like to a utility pole facility, the wire may come into contact with the electric wire and cause a short circuit.
Therefore, a so-called umbrella-bone type bird damage prevention device having a shaft portion and branch portions (flying prevention rods) radially extending obliquely downward from the shaft portion is used as a cross arm. By attaching it to the bird, it prevents birds from flying and nesting (see, for example, Patent Document 1).

JP 2014-117269 A

However, depending on the position of the spreading branches, they may come into contact with the high-pressure edge wire after being attached to the cross arm. must be kept.
However, it is not easy to determine, prior to installation, which branches are close to the edge line and become a hindrance. After installation, if it is different from what was expected, it must be redone, and it takes time to install the bird damage prevention device. In addition, if the branches are in contact with high-voltage edge lines, salt damage may cause ground faults. On the other hand, if too many branches are removed or too many branches are removed due to the separation from the high-voltage edge line, the effect as a bird damage prevention device is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bird damage prevention device that allows branches to be easily installed at appropriate positions.

(1) In order to solve the above-mentioned problems, the present invention provides a bird damage prevention tool comprising a shaft and branch portions extending radially obliquely downward from the shaft, wherein the shaft has a bent portion inside. and the branch portion is inserted into the through hole and attached to the shaft portion so as to be bent at the bending portion along the through hole. do.

(2) The through-hole extends obliquely upward from each of the two entrances provided on the side of the shaft portion and is connected to the bent portion inside the shaft portion, and the bent portion is located in the shaft portion. It may be in the shape of an upward projection in the axial direction.

(3) The through-hole extends obliquely upward from each of two inlets and outlets provided on the side of the shaft, and is connected inside the shaft, and the bent portion extends in a direction toward the axis of the shaft. It may be protruding.

(4) A plurality of through-holes may be provided at different positions in the axial direction or radial direction of the shaft portion so as not to communicate with each other, and the branch portions may be inserted through the respective through-holes.

(5) A plurality of bird damage prevention units each including the shaft portion and the branch portion may be provided, and the shaft portions may be coaxially connectable to each other.

(6) The shafts connected to each other may be rotatable relative to each other.

(7) It is preferable that the tip of the branch portion is wider than the diameter of the through hole.

ADVANTAGE OF THE INVENTION According to this invention, the bird damage prevention tool which can install a branch part in an appropriate position easily can be provided.

It is a side view explaining the installation state of the bird damage prevention tool 1 of embodiment. FIG. 2 is a schematic top view for explaining an installation state of the bird damage prevention device 1; 4 is a partially enlarged view of the bird damage prevention unit 100. FIG. FIG. 10 is a diagram showing a modification of the position of the through hole 23;

A bird damage prevention device 1 according to an embodiment will be described below with reference to the drawings. FIG. 1 is a side view explaining the installation state of the bird damage prevention device 1 (1A, 1B) of the embodiment, and FIG. 2 is the installation state of the bird damage prevention device 1 (1A, 1B, 1C, 1D). It is a schematic diagram seen from the upper surface.

As shown in FIG. 1, the bird damage prevention device 1 (1A, 1B) is a so-called umbrella bone type bird damage prevention device. 3 are coaxially connected in multiple stages. Further, the bird damage prevention device 1 has a conical top portion 5 attached to the upper end of the connected bird damage prevention units 100A, 100B, and 100C, and a fixing portion 4 having a screw portion 4a at the lower end attached to the lower end. Prepare.

The fixed part 4 is a part attached to the cross arm 20A of the utility pole 20 by the support fitting 10 . The support fitting 10 includes an L-shaped bent support member 11, an L-shaped bent bolt member 12, and a triangular pressing member 14. As shown in FIG.

The support member 11 has a horizontal portion 11a and a vertical portion 11b, and one end of the horizontal portion 11a is provided with an opening 11c through which the lower screw portion 4a of the fixing portion 4 is inserted.
The bird damage prevention device 1 is fixed to the support member 11 by inserting the threaded portion 4a of the fixing portion 4 into the opening 11c and fastening the nut 15 to the threaded portion 4a.
The other end side of the horizontal portion 11a of the support member 11 is placed on the upper surface of the arm 20A, and the vertical portion 11b extends downward along the side surface of the arm 20A.

One end of the bolt member 12 is locked to the lower surface of the horizontal portion 11a of the support member 11, and the other end is a male screw portion 12a.
The inner surface side of the corner between the horizontal portion 11a and the vertical portion 11b of the support member 11 is brought into contact with the corner of the arm 20A having a rectangular cross section. Then, the male screw portion 12a of the bolt member 12 protrudes outward from the hole 11d provided in the lower portion of the vertical portion 11b. By fastening a nut 13 to the male threaded portion 12a of the bolt member 12, the bird damage prevention device 1 is supported by the arm 20A via the support fitting 10. As shown in FIG.
The pressing member 14 is attached so that the arm 20A abuts the lower surface and the side faces abut the inner surface of the vertical portion 11b to prevent the support metal fitting 10 from tilting toward the arm 20A.

The cross arm 20A is cantilevered on the utility pole 20 shown in FIG. 2 and arranged in a substantially horizontal state. In the form shown in FIG. 2, a pair of arms 20A are arranged substantially parallel to each other with the utility pole 20 interposed therebetween. Each cross arm 20A has three pin insulators Pi for holding electric wires arranged at approximately equal intervals.

(Bird damage prevention tool 1)
The bird damage prevention device 1 is arranged in the central portion of the adjacent pin insulator Pi in each cross arm 20A. For example, in FIG. 2, two bird damage prevention devices 1 are arranged on one cross arm 20A, and a total of four bird damage prevention devices 1A, 1B, 1C, and 1D are provided.

As shown in FIG. 1, the bird damage prevention device 1 includes a plurality of bird damage prevention units 100 (100A, 100B, 100C) coaxially connected. FIG. 3 is a partially enlarged view of one bird damage prevention unit 100. FIG. Since the bird damage prevention units 100A, 100B, and 100C have the same configuration, they will be collectively described as the bird damage prevention unit 100 below.

The bird damage prevention unit 100 includes a shaft portion 2 and two branch portions 3 . Two branches 3 are attached to one bird damage prevention unit 100 . Each branch 3 is inserted into a through-hole 23 which will be described later, and both ends of the branch 3 extend radially in two directions from the through-hole 23 of the shaft 2 . It extends in four directions.

The shaft portion 2 is a cylindrical member extending vertically around the axis L0.
(Connecting hole 21 at the upper end)
A connecting hole 21 is provided at the upper end of the shaft portion 2 . The connecting hole 21 has a small diameter hole 21a and a large diameter hole 21b provided below the small diameter hole 21a. Groove portions 21c extend radially outward from two locations on the side surface of the small-diameter hole 21a. The two grooves 21c extend radially to the same position as the inner surface of the large-diameter hole 21b, and in the embodiment, are provided at symmetrical positions with respect to the axis L0, that is, on a straight line.

A connecting portion 22 is provided at the lower end of the shaft portion 2 . The connecting portion 22 has a cylindrical portion 22a having substantially the same diameter as the small-diameter hole 21a, and projections 22b extending radially outward from two locations on the side surface of the lower end of the cylindrical portion 22a. The two protrusions 22b are provided at symmetrical positions with respect to the axis L0, that is, on a straight line.

Here, the radial length of the groove portion 21c and the radial length of the protrusion 22b are substantially equal. In addition, the length of the connecting portion 22 in the direction of the axis L0 (the length of the cylindrical portion 22a in the direction of the axis L0) and the length of the connecting hole 21 in the direction of the axis L0 (depth, the difference between the small diameter hole 21a and the large diameter hole combined length). Furthermore, the length of the protrusion 22b in the direction of the axis L0 and the length (depth) of the large-diameter hole 21b in the direction of the axis L0 are substantially equal.

That is, for example, the connecting portion 22 of the bird damage prevention unit 100B arranged thereon is inserted into the connection hole 21 of the bird damage prevention unit 100C.
At that time, the protrusion 22b is aligned with the groove 21c, and the cylindrical portion 22a is inserted into the small-diameter hole 21a. Then, when the lower end of the cylindrical portion 22a is pushed in until it reaches the bottom surface of the large diameter hole 21b of the connecting hole 21, the protrusion 22b enters the large diameter hole 21b from the groove portion 21c, and moves around the axis L0 in the large diameter hole 21b. rotatable.
Then, the connecting portion 22 is rotatable in the connecting hole 21, that is, the shaft portion 2 of the bird damage prevention unit 100B above is rotatable with respect to the shaft portion 2 of the bird damage prevention unit 100C below.
However, at this time, in the embodiment, since the gap between the connecting portion 22 and the connecting hole 21 is very small, a frictional force is generated. It does not rotate freely with respect to the harm prevention unit 100C.

The shaft portion 2 is provided with a through hole 23 having a bent portion 23a therein. The through hole 23 extends obliquely upward from each of two entrances 23b provided on the side of the shaft portion 2 and is connected to the inside of the shaft portion 2 at a bent portion 23a projecting upward in the direction of the axis L0. is.
Further, in the embodiment, in order to secure the length of the through hole 23, the cylindrical member 24 extends obliquely downward from the side surface of the shaft portion 2 so as to cover the outer periphery of the through hole 23, and the inlet/outlet 23b is at the tip of the cylindrical member. is provided.
Two through-holes 23 are provided in the embodiment, and the respective through-holes 23 are provided at different positions (upper and lower in the embodiment) in the direction of the axis L0 so as not to communicate with each other. In FIG. 3, the upper through-hole is shown as a through-hole 23U, and the lower through-hole is shown as a through-hole 23D.

The branch portion 3 is flexible and has a cylindrical portion 3a and wide portions 3b provided at both ends of the cylindrical portion 3a.
The diameter of the cylindrical portion 3a is substantially equal to the diameter of the through hole 23, and the cylindrical portion 3a can be inserted through the through hole 23. As shown in FIG.
Since the width of the wide portion 3b in the direction perpendicular to the axis L1 is larger than the diameter of the through hole 23, the wide portion 3b cannot be inserted through the through hole 23 as it is. However, the wide portion 3b can be bent about the axis L1, and by bending, the width perpendicular to the axis L1 becomes narrower.

A wide portion 3b on one end side of the branch portion 3 is bent and inserted into the through hole 23 from one entrance 23b.
Then, when the branch portion 3 is pushed into the through hole 23 so that the wide portion 3b on the one end side is inserted into the through hole 23, the wide portion 3b advances obliquely upward, changes direction at the bent portion 23a, and further obliquely downwards. and exits from the other doorway 23b.
That is, the inserted branch portion 3 is attached to the shaft portion 2 so as to be bent at the bent portion 23 a inside the through hole 23 .
In the embodiment, since the cylindrical member 24 extends obliquely downward from the side surface of the shaft portion 2 so as to cover the outer periphery of the through hole 23, even if the branch portion 3 has flexibility, it can be moved in the horizontal direction. Spread is preserved.
The wide portion 3b on the one end side, which is exposed to the outside, expands from the bent state and returns to its original shape. When the wide portion 3 b on the one end side is pulled, the one end side of the branch portion 3 extends further outward from the through hole 23 and the other end side is pulled into the through hole 23 . However, since the wide portion 3b on the other end side is not inserted into the through hole 23 unless the wide portion 3b is also bent, the branch portion 3 does not slip out of the through hole 23.例文帳に追加

Then, by pulling either one end or the other end of the branch portion 3, the length of the branch portion 3 extending from one entrance 23b of the through hole 23 and the length extending from the other entrance 23b of the through hole 23 can be freely adjusted. can be done.

As shown in FIG. 1, for example, when two bird damage prevention devices 1A and 1B are arranged close to each other, the side of the branch 3 where the bird damage prevention devices 1A and 1B are close to each other is shortened and the other side is lengthened, it is possible to easily prevent the branches 3 of the bird damage prevention devices 1A and 1B from colliding or overlapping each other in the horizontal direction.

Further, the bird damage prevention units 100A, 100B, and 100C provided above and below in one bird damage prevention device 1 are rotated around the axis L0, so that each branch 3 can be seen from above. can be made so that they do not overlap horizontally.
An example is shown in FIG. In the drawing, the branch 3 of the bird damage prevention unit 100A is indicated by a solid line, the branch 3 of the bird damage prevention unit 100B is indicated by a chain line, and the branch 3 of the bird damage prevention unit 100C is indicated by a dashed line.
As shown in the figure, the branch portion 3 (100A) of the bird damage prevention unit 100A and the branch portion 3 (100B) of the bird damage prevention unit 100B are rotated relative to each other so that the bird damage prevention unit can be viewed from above. It is easy to prevent the branch portion 3 (100A) of 100A, the branch portion 3 (100B) of the bird damage prevention unit 100B, and the branch portion 3 (100C) of the bird damage prevention unit 100C from overlapping in the horizontal direction. can be done.

As described above, according to the embodiment, the length of the branch portion 3 extending from the shaft portion 2 can be optimally adjusted after the bird damage prevention device 1 is fixed to the cross arm 20A. Therefore, the length of the branch portion 3 extending from the shaft portion 2 can be easily finely adjusted while observing the state of the edge line. Therefore, there is no need to previously remove or cut the branches 3 which may be an obstacle.
Since the length and position of the branch part 3 extending from the shaft part 2 can be optimized, the bird damage prevention device 1 can be efficiently arranged without waste. Therefore, it is possible to reduce the number of installations of the bird damage prevention device 1 at a predetermined location.
Since the length of the branch part 3 extending from the shaft part 2 can be easily finely adjusted while observing the state of the edge line, the installation work time of the bird damage prevention device 1 can be shortened. Furthermore, since the structure is simple, the cost can be reduced.

(deformed form)
(1) In the above-described embodiment, the through-holes 23 extend obliquely upward from the two entrances 23b provided on the side of the shaft portion 2 and are connected to each other inside the shaft portion 2, and the bent portion 23a 2 projecting in the direction toward the axis L0. A plurality of through holes 23 are provided at different positions in the vertical direction on the shaft portion 2 so as not to communicate with each other.
However, it is not limited to this. FIG. 4 is a diagram showing a modified form of the position of the through hole 23. As shown in FIG. As shown in the figure, a plurality of through holes 23 may be provided at different positions in the horizontal direction of the shaft portion 2 so as not to communicate with each other.
(2) In the above-described embodiment, a plurality of bird damage prevention units 100 are provided. However, the present invention is not limited to this. good.

Reference Signs List 1, 1A, 1B, 1C, 1D Bird damage prevention device 2 Shaft 3 Branch 3a Cylindrical part 3b Wide part 4 Fixed part 20 Utility pole 20A Cross arm 21 Connecting hole 21a Small diameter hole 21b Large diameter hole 21c Groove 22 Cylindrical part 22 Connection Part 22a Cylindrical part 22b Projection 23, 23D, 23U Through hole 23a Bent part 23b Doorway 100, 100A, 100B, 100C Bird damage prevention unit

Claims (7)

A bird damage prevention tool comprising a shaft portion and branch portions radially extending obliquely downward from the shaft portion,
The shaft portion is provided with a through hole having a bent portion inside,
The branch portion is inserted into the through hole and attached to the shaft portion so as to be bent at the bending portion along the through hole,
Bird damage prevention tool. The through-hole extends obliquely upward from each of two inlets and outlets provided on the side of the shaft and connects at the bent portion inside the shaft, and the bent portion extends in the axial direction of the shaft. is an upward protrusion,
The bird damage prevention tool according to claim 1. The through-hole extends obliquely upward from each of two entrances and exits provided on the side of the shaft, and connects inside the shaft, and the bent portion protrudes in a direction toward the axis of the shaft. is
A bird damage preventive tool according to claim 1 or 2. a plurality of the through-holes are provided at different positions in the axial direction or the radial direction of the shaft portion so as not to communicate with each other;
The branches are inserted through respective through-holes,
A bird damage prevention tool according to any one of claims 1 to 3. a plurality of bird damage prevention units each including the shaft portion and the branch portion;
the shafts are coaxially connectable to each other;
A bird damage prevention tool according to any one of claims 1 to 4. the shafts connected to each other are rotatable relative to each other;
The bird damage prevention tool according to claim 5. The tip of the branch is wider than the diameter of the through hole,
A bird damage prevention tool according to any one of claims 1 to 5.

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