JPH0423418Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a bird prevention device for preventing damage to wild birds.

(Prior art) Conventional bird prevention devices to prevent damage to fruit trees, agricultural crops, etc. by wild birds have been used, for example, by using explosive sound and vision, or by molding plastic in the shape of a hawk and using its wings. A large-scale device such as an electrically operated bird deterrent device or a device that moves the bird deterrent device from side to side with the movement of the cable line, or a vinyl balloon with an eyeball pattern drawn on it and hung. A variety of methods have been developed and provided, ranging from small-scale and simple products such as objects.

(Problem that the invention aims to solve) However, the former large-scale project requires power equipment, fuel, etc., and it is inevitable that costs and expenses will increase. In addition, the latter small and simple type does not have a structure that takes advantage of the habits of wild birds from various angles, so it is not as expected due to factors such as habituation. A stable and long-term bird prevention effect could not be expected.

(Means for solving the problems) This invention was made to solve the above problems.

Wild birds are originally very nervous and wary animals, and they have a particularly sensitive animal-like sense that causes them to be abnormally fearful and wary of certain visual and auditory stimuli. In particular, it is widely known as a result of tests that birds have a habit of being extremely afraid of large feathers, and that if a thin line is placed on the ground such as in a field, there is a tendency for birds to become wary and avoid getting close to it. ing.

Based on the above knowledge, the present inventor has succeeded in devising an extremely simple, inexpensive, and highly effective rational bird prevention device that aims to achieve a combined effect by utilizing the above two habits of wild birds.

The bird prevention device of this invention will be described in detail below with reference to the drawings. Reference numeral 1 denotes a tension wire stretched between supports 3 and 3 in the air at an appropriate height above the ground 2, such as in a field of agricultural crops. A thin thread with strong torsional elasticity that is resistant to wind and rain, such as
lines are used. Note that this tension wire 1 is desirably thin enough to prevent birds from perching on it.
Therefore, in this device, a plurality of bird wings 4 are fixed to the tension wire 1 at appropriate intervals.

As the bird feathers 4, it is desirable to use the feathers of birds as large as possible, such as stiff wing feathers with thick rachis, and each bird feather 4
As shown in the figure, the rods are respectively provided on the tension wire 1 by fixing the bases of the rachis 5 so that they are substantially perpendicular to the tension wire 1.

(Effect of the invention) As mentioned above, this invented device uses the habit of wild birds not to approach because they are afraid and wary.A thin tension wire 1 is stretched in the air at an appropriate height using a support 3, etc. Since a plurality of bird feathers 4, which wild birds are most afraid of and awe at, are attached to the tension wire 1 at appropriate intervals, the compound synergistic effect of the two elements that wild birds are most afraid of greatly reduces habituation. It has an outstanding long-term and stable bird-prevention effect.

In this invention, a thin wire with torsional elasticity, such as nylon thread, is used as the tension wire 1, so when the wind blows, each bird blade 4 receives the wind and rotates in one direction like a propeller. When the bird stops, the torsional repulsion and restoring force of the tension wire 1 causes the bird blades 4 to rotate in the forward and reverse directions with the wind, swinging greatly together with the tension wire 1, which has an excellent effect of further improving the bird prevention effect. There is.

In addition, since the bird wings 4 are extremely light, they move well even in the slightest breeze, and the number of supports 3, etc., is small, and both the tension wire 1 and the bird feathers 4 are inexpensive, and the equipment can be easily installed. .

[Brief explanation of drawings]

The drawing is a front view showing an embodiment of this invented bird prevention device. 1... tension wire, 2... ground, 3... support, 4...
Bird feather, 5... feather shaft.

Claims (1)

[Scope of utility model registration request] For example, a thin tension wire 1 such as nylon thread that is resistant to wind and rain and has strong torsional elasticity is attached to the support 3.
A bird prevention device comprising a plurality of bird feathers 4 which are stretched in the air at an appropriate height by means of wires 1 and fixed at appropriate intervals.