JPH05268862A - Prevention of bird injury to telegraph pole or the like - Google Patents

Abstract

PURPOSE:To prevent birds from approaching a telegraph pole, etc., by fixing light-reflective plastic materials respectively to suitable parts of a cross arm, etc., of a telegraph pole with wires, etc. CONSTITUTION:Light-reflective plastic materials 1A1, 1A2, 1A3... are fixed with wires (W), etc., to places in danger of bird injury, e.g. a cross arm (C) of a telegraph pole or a high-voltage pylon. As the light-reflective plastic materials, a synthetic resin mirror, a fine lens, a prism plate, etc., are sufficient for use by leaving a space of 10 to 30cm.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing bird damage caused by nesting or stopping of birds on electric poles or the like.

[0002]

BACKGROUND OF THE INVENTION Many birds such as pigeons, crows, and kites originally nest on trees, but when there are no suitable trees nearby, they use nests of arm poles of electric poles or truss members of high-voltage towers as substitutes for trees. There are many. At this time, an iron wire or wire is brought as a nesting material to short-circuit the electric wire, which often causes a power failure accident. The same accidents will also occur with snakes aiming at the eggs after spawning and approaching the nests, and snakes that large birds have bitten as food.

It is needless to say that these accidents are not preferable from the viewpoint of nature protection and animal welfare, especially when a power failure accident is caused, there is no way to discover the cause other than careful patrol, and it is a great deal. It is a big problem that it requires human power and prolongs the recovery. For this reason, electric power companies around the country are working to remove nests by patrol all the time.
It is still used by, but it is still annoying. Therefore, the best method is to keep the birds away from the power poles as much as possible, but up to now, no bird-harvesting method that is harmless to humans and has endurance has not been developed.

[0004]

In view of the above circumstances, the present invention is effective in suppressing the approach of birds to utility poles,
Moreover, the aim is to develop measures that are durable over the long term.

[0005]

[Means for Solving the Problems]

(1) Concept Therefore, in order to solve the above problems, the present inventor aims to develop a means that can safely and effectively prevent the birds from approaching the electric poles, etc. As a result, the present inventors have reached the present invention by recognizing the fact that sunlight reflected by a reflecting material such as a mirror repels birds.

(2) Overview Based on the above findings, the present invention is characterized in that a light-reflecting material is attached to a place where birds may nest or stop, such as a pole of a utility pole or a truss member of a high-voltage tower. The main points are bird damage prevention methods such as. Hereinafter, various elements constituting the invention will be described by dividing them into items.

(3) Light-reflecting material As the light-reflecting material, a plastic mirror is suitable from the viewpoint of impact resistance, workability, and non-conductivity, but especially an acrylic resin (polymethylmethacrylate) plate. It is more preferable from the viewpoints of weather resistance and productivity that the thin film made of metal fine particles such as aluminum is attached to the surface of the surface by a known means such as vapor deposition or sputtering. It should be noted that the one having the thin film-attached surface protected by a transparent plastic plate, sheet, or the like is most excellent in terms of corrosion resistance against smog, stain resistance, and weather resistance.

Instead of the flat reflecting material, a reflecting material having a curved surface such as a convex curved surface or a spherical surface can be used. These non-planar reflectors cause a wide range of birds to be vigilant, as the range of reflection angles is less affected by the elevation and direction of the solar orbit. Such a reflection angle enlarging action is the same even when the surface of the flat reflecting material is made of fine regular irregularities such as a fine prism, Fresnel lens or lenticular lens.

The above light-reflecting material is formed into an appropriate shape such as a flat plate shape, a convex curved surface shape, an L-shape, a U-shape, or a spherical shape having a size suitable for being attached to, for example, a pole of a utility pole. It is more convenient to use if it has a mounting means such as an adhesive, a hole, and a metal fitting. If desired, a metal plate, a rigid plastic plate, or the like may be reinforced for protection of the mirror surface or independently of the protection.

The flat reflector is easy to manufacture and most versatile, but the orbit of the sun changes moment by season and time, so the reflection angle cannot be kept constant by itself. On the contrary, the curved shape has a smaller change in the reflection angle due to the change in the orbit, and in particular, the spherical shape and the regular polyhedron or the mixed regular polyhedron such as the mirror ball or the soccer ball have the reflection depending on the angle. It excels in that the change in quantity is minimal. However, as will be shown in Example 5 (Test Example 1) below, even a flat plate-shaped reflector can provide a sufficient effect in practical use.

(4) Object The representative objects to which the method of the present invention is applied are the above-mentioned arm poles of electric poles, truss members of high-voltage towers, etc., but in addition, for example, bridge girders of bridges, handrails of balconies, window frames, etc. , The eaves,
It can be any place where there is a risk of bird damage, such as the attic of the station building.

(5) Attachment of reflector The attachment of the reflector to the above-mentioned object is, for example, a wire that passes through a small hole formed in itself, a binding with a string, an appropriate fixing such as tightening or adhering with a screw. By means. The mounting density varies depending on the type of object and the habitat density of birds, but in general, it is sufficient to install at intervals of 10 to 30 cm,
It is not necessary to cover the entire target area. However, in the case of a flat plate type, the average repelling effect is enhanced by mounting a plurality of sheets by changing the facing direction so as to cope with the angle change of the incident light ray due to the operation of the sun.

Generally, the most effective location is a place with a view, but the direction of reflection by a flat reflector naturally depends on the angle of the sun. Even if the bird approaches the flat reflector from the same direction as the sun, no reflected light is visible. That is, the flat reflector has a large amount of reflected light itself, but its reflection range is limited to a diagonal region approximately equal to the altitude of the sun.
On the contrary, the reflection angle of the curved or spherical convex curved surface reflection material is
The bird's eye view is wide. Therefore, for example, when the curved reflecting material is arranged in the vertical and horizontal directions, the maximum repellent effect can be expected.

[0014]

[Action] Birds are sensitive in their vision, and if they recognize glare (irregularly polarized light) due to reflection while flying over the sky, they may instinctively feel dangerous and avoid the place. Since it does not try to nest, damage caused by nesting and excretion is prevented.

[0015]

The present invention will now be described in more detail by way of examples, but the examples are merely for the purpose of illustration and are not meant to limit or limit the inventive idea.

Example 1 (Product Example (1)) FIG. 1 is a plan view of an example of a reflecting material that can be used for carrying out the method of the present invention, and FIG. 2 is a sectional view taken along line XX of FIG. ,
FIG. 3 is a perspective view showing the usage state.

Whole 1 _A is a rigid polyvinyl chloride plate (back plate)
4 made of aluminum vapor-deposited polymethylmethacrylate plate 2 superposed on top of each other with an adhesive layer 3 interposed therebetween, and binding small holes 5, 5 ... However, if the thickness of the polymethylmethacrylate plate 4 is sufficient, the combined use of the back plate 2 can be omitted. Also, instead of the small holes, an adhesive may be applied to the back surface.

In use, the wire W is attached to the surface of the arm C of the utility pole as shown in FIG. 3, for example. In order to cope with the change in the irradiation angle of sunlight, it is desirable to attach a plurality of reflectors 1 _A so as to face each other in both the south and zenith directions and, if possible, the east and west directions.

In FIG. 3, the reflectors 1 _A1 and 1 _{A2 on the} upper surface of the armrests point in the zenith direction regardless of the direction of the armrests, and therefore reflect sunlight at all angles throughout the four seasons. However, since the altitude of the sun decreases in winter, for example, when the arm C is along the east-west direction, if the reflector 1 _A3 facing the south is attached to the side of the arm facing the south, a decrease in the total reflection efficiency can be suppressed. As described above, it is preferable that the facing direction of the reflecting material on the side surface faces the south side as much as possible. Therefore, when the arms are in the north-south direction due to the wiring, it may be preferable to attach the reflecting material to the end surface of the arms that faces the south.

Example 2 (Product Example (2)) FIG. 4 is a plan view of another reflector used for carrying out the invention.
FIG. 5 is a sectional view taken along the line YY of FIG.

The reflector 1 _B of this example is an example in which the vapor-deposited surface 2a of the aluminum vapor-deposited polymethylmethacrylate plate 2 is inwardly reinforced by a polycarbonate back plate 4 and the whole is curved in an arc shape.

The reflecting material 1 _B of this example is the aluminum vapor deposition surface 4 a.
Because of the curved shape, it reflects light almost uniformly over a wide range of angles regardless of changes in the altitude of the sun due to changes in the four seasons and the time of day. In addition, since the whole is curved, it scatters the reflected light over a wide range.

Embodiment 3 (Product Example (3)) FIG. 6 is an elevational view of still another reflector used for carrying out the invention, and FIG. 7 is a sectional view taken along line ZZ of FIG. is there.

The reflector 1 _C of this example is a thin film of silver 2'a formed by using a silver mirror reaction (ammoniacal silver nitrate reduction reaction) on the inner surface of a spherical spherical substrate 2'made of polycarbonate prepared by hollow molding means. A bolt 7 with a hemispherical holder 6 is attached to the spherical mirror formed with the adhesive 3 using an adhesive 3.

Since the reflector 1 _C of this example has a spherical shape by itself, it has the ability to reflect sunlight in the widest range, and can be reliably attached to a arm or the like using the attachment bolt 7.

Embodiment 4 (Product Example 4) FIG. 8 is a cutaway perspective view showing still another example of the invention.

In the reflector 1 _D of this example, an adhesive layer 3 ′ is provided on the inner surface of an L-shaped aluminum vapor-deposited polymethylmethacrylate reflector substrate 2 ″ through a thin polyurethane foam layer 8 and further the layer 3 The upper surface of the ‘′’ is protected by the release paper layer 9. The length from the bent portion to each free end in the figure is selected to be substantially equal to the surface width of the timber forming the armrest.

The reflecting material of this example is easy to install because the release paper layer is only peeled off and it is attached to the target arm or the like. Moreover, with one piece of attachment, the zenith direction and the south face (or east or west face) ) Is obtained.

Example 5 (Test Example 1) On the upper surface of each arm of 20 utility poles that had been damaged by nesting in the past, the length was
An aluminum vapor-deposited polymethylmethacrylate plate (having a thickness of 250 mm, a width of 100 mm and a thickness of 3 mm (excluding the reinforcing plate from that of Example 1) was tied with a wire and observed for one year. No damage due to nesting occurred at all.

[0030]

INDUSTRIAL APPLICABILITY As described above, the present invention can utilize the habit of birds to develop safe and effective means for preventing bird damage caused by nesting or stopping of birds on power distribution facilities such as utility poles. By doing so, it can contribute to the prevention of power outages and pollution due to bird droppings.

[Brief description of drawings]

FIG. 1 is a plan view of an example of a reflective material that can be used to carry out the method of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a perspective view showing a usage state of the reflecting material of FIGS. 1 and 2.

FIG. 4 is a plan view of another reflector used to carry out the present invention.

5 is a cross-sectional view taken along the line YY of FIG.

FIG. 6 is a plan view of still another reflector used in the practice of the present invention.

7 is a cross-sectional view taken along the line ZZ in FIG.

FIG. 8 is a cutaway perspective view of yet another example of a reflective material used for implementing the present invention.

[Explanation of symbols]

1 _A to 1 _D : Whole reflector used in the method of the present invention 2: 1 _A to 1 _B reflector substrate 2a: 1 _A , 1 _B and 1 _D aluminum vapor deposition layer 2 ': 1 _C reflector Substrate 2'a: 1 _C silver plated layer 2 ": 1 _D reflector substrate 3: Adhesive layer 3 ': 1 _D adhesive layer 4: 1 _A and 1 _B reinforcing plate 5: 1 _A and 1 _B mounting hole 6: 1 _C holder 7: 6 mounting bolt 8: 1 _D foamed polyurethane layer 9: 1 _D release paper layer

Claims (3)

[Claims] 1. A method for preventing damage to birds such as utility poles, which is characterized in that a light-reflecting material made of plastic is attached to a place where birds such as arms of utility poles, truss members of high-voltage towers, etc. may nest or stop. 2. The method according to claim 1, wherein the light reflecting material is a mirror, a fine lens or a prism plate made of synthetic resin. 3. The method according to claim 1 or 2, wherein the light reflecting material comprises attachment means to an object.