JPH018136Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention [Industrial field of application] The invention is intended to prevent birds from building nests on steel towers, etc.

[Conventional technology]

Birds build nests on power transmission towers, causing various problems, and the present applicant previously proposed Utility Model Application No. 118,488/1983 as a nest prevention device to prevent this.

That is, an outer cylinder and an inner cylinder are provided concentrically, one of them is fixed, and the other is rotated by a weather vane, and on a plane perpendicular to the axis of rotation, a plurality of cylinders are installed on the circumferential surface of the outer cylinder. A through-hole is drilled through the tube, and a plurality of prosthetic eyes of birds of prey are attached to the circumferential surface of the inner cylinder, and the prosthetic eyes are moved in and out of the window by rotating the weather vane.

[Problem that the invention attempts to solve]

However, with the above method, depending on the direction of the wind, there is a risk that the artificial eye may be hidden between adjacent window holes. In order to prevent this, it is possible to increase the number of artificial eyes, but there are problems such as increased costs if many expensive artificial eyes are used.

The present invention aims to solve the above problems.

B. Structure of the invention [Means for solving the problem] In other words, the concentric inner and outer cylinders 1 and 2 are configured to rotate relative to each other by means of a wind catch blade 3, and the bird's eye prosthesis 4 attached to the inner cylinder 1 is This is a bird nest prevention device configured to be moved back and forth into a circumferential elongated hole 5 of an outer cylinder 2.

[Effect]

Regardless of the direction of the wind, the artificial bird eye 4 attached to the inner cylinder 1 is always located within the circumferential elongated hole 5 of the outer cylinder 2. When one cylinder rotates due to a change in wind direction, the artificial eye 4 moves within the above range, making it appear as if the eye of a bird of prey is moving.

Therefore, if the preventer A of the present invention is installed at an appropriate location such as on a steel tower, birds such as crows will appear to be constantly being watched by the birds of prey and will be unable to approach them, thereby preventing them from nesting.

〔Example〕

The illustrated example shows an L-shaped board 7 and a cross arm 6 provided integrally with the angle T1 of a power transmission tower T.
It is attached using a shape bolt 8 or the like, and the rotating shaft 9 of the inner and outer cylinders 1 and 2 is attached to the arm 6 via a mounting fitting 10. In this case, the mounting bracket 10 is constructed such that its tilt can be adjusted with respect to the armrest 6 using the shaft bolt 11, etc., as shown in the figure, so that the rotation shaft 9 is always fixed regardless of the mounting position on the steel tower T. It is possible to install it almost vertically.

In the case of the figure, the inner cylinder 1 is attached to the rotation axis 9 by the bolt 12.
etc., and the outer cylinder 2 has a short cylinder part 13 integrally provided on the inner surface of the central part of the top surface 2a thereof, and the short cylinder part 13 is fixed to the upper end part 9a of the shaft 9.
The shaft 9 is inserted into the center hole 16a of the bottom plate 16, which is attached to the lower surface of the outer cylinder with bolts 14, nuts 15, etc., and is rotatably supported. By attaching a plurality of wind receiving vanes 3 to the circumferential surface of the outer cylinder 2 in the radial direction, the inner and outer cylinders 1 and 2 are relatively rotated by wind. 17 is a thrust receiver provided at the upper end 9a of the rotating shaft 9; 18 is a bottom plate 16;
This is a collar for preventing the outer cylinder from coming off, which is fixed to the shaft 9 with a screw 18a on the upper surface of the outer cylinder. Note that the inner cylinder 1 may be painted white, and the outer cylinder 2 may be painted brown.

The bird of prey prosthetic eye 4 uses, for example, a prosthetic eye for taxidermy of a deer, a kite, an owl, etc. In the case shown in the figure, six eyes are provided on the circumferential surface of the inner cylinder 1 at approximately equal intervals in the circumferential direction, and corresponding eyes are provided. The same number of oblong holes 5 are formed in the circumferential direction on the circumferential surface of the outer cylinder 2.

The above-mentioned artificial eye 4 has a structure in which a black circle 4b and a yellow circle 4c of plastic are pasted on the rear surface of a hemispherical glass 4a. The elongated hole 5 is horizontally elongated at least twice the diameter of the artificial eye 4. Reference numeral 19 denotes a yellow reflective sheet pasted around the elongated hole 5 in the shape of an eyelid. Since the circumferential surface of the inner tube 1 is white as described above, it appears that the white of the eye and the iris of the artificial eye 4 are located inside the oblong hole 5.

Reference numeral 20 denotes a rotation angle regulating mechanism of the outer tube 2 for moving the artificial eye 4 within the elongated hole 5, and the illustrated example is a stopper 21 attached to the collar 18 for preventing the outer tube from coming off.
and a pair of stopper pins 2 planted in the bottom plate 16.
It consists of 2 and 22. However, the above-mentioned rotation angle regulating mechanism has a stopper 21 extending inward on the inner surface of the outer cylinder 2, a stopper pin 22 on the top surface of the inner cylinder 1, etc., and the structure and arrangement position thereof may be determined as appropriate.

Note that the outer cylinder 2 may be fixed and the inner cylinder 1 may be rotated by a weather vane or the like. Moreover, it can be installed not only in power transmission towers but also in other towers, buildings, etc. as appropriate.

C. Effect of the invention Since the present invention has the above-described configuration, the artificial bird of prey eye 4 of the inner cylinder 1 is always located within the circumferential elongated hole 5 of the outer cylinder 2 and moves within that range, regardless of the wind direction. do.
Therefore, the artificial eye 4 is not hidden between the adjacent elongated holes 5, 5, which is more effective in preventing birds such as crows from building nests.

[Brief explanation of the drawing]

FIG. 1 is a front view of a steel tower on which the nest prevention device of the present invention is installed, FIG. 2 is an enlarged partially vertical front view of the nest prevention device, and FIG. 3 is a partially cutaway plan view thereof. 1 is the inner tube, 2 is the outer tube, 3 is the wing plate, 4 is the bird's eye prosthesis, and 5 is the long hole.

Claims (1)

[Scope of utility model registration request] This bird nesting prevention device has a structure in which concentric inner and outer cylinders are relatively rotated by wind receiving blades, and a bird's eye prosthesis attached to the inner cylinder is moved back and forth within a circumferentially elongated hole in the outer cylinder.