JPH018137Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is used for starlings, starlings,
This invention relates to a bird prevention device for preventing feeding damage caused to agricultural crops by flying bulbuls or sparrows in groups.

(b) Prior art Since birds fly in groups during the harvesting season of agricultural products, especially fruits and grains, and cause damage to these agricultural products, so-called defense systems have been used since ancient times to create meshes that prevent birds from entering. Bird nets have been spread over crops to prevent feeding damage, but since the cultivated land for crops is vast, a large area of bird nets is required, and it takes a lot of cost and effort to cover and spread these nets. However, because the trees are large in size, it is extremely difficult to spread the covering over the fruit, so it is almost never used. For this reason, in recent years, bird nets have been replaced by so-called bombers that intermittently explode propane gas and use the sound of the explosions to intimidate and dissipate birds, or by hanging models that resemble the eyes and body types of animals that are natural enemies of birds. So-called intimidation models are used exclusively to make predators flee with a sense of threat.

(c) Problems that the invention aims to solve However, since the birds that cause damage to agricultural crops mainly live within the living area of humans, they easily adapt to the various sounds and movements associated with industrial activities. However, with explosive devices that simply emit explosive sounds intermittently, in areas other than extremely close ranges where the sound pressure is strong, people gradually get used to the explosive sounds and their threatening effect weakens, and on the other hand, they often forget to shut down their operation at night, resulting in new explosions. In reality, the threat model is causing a lot of noise pollution, and because the threat model needs to be sufficiently visible to flying birds, it has to be installed in large numbers suspended over vast arable land, making it expensive in terms of cost. Moreover, the threatening model does not change its depiction in any particular way other than simply being swayed by the wind, and has problems such as getting used to it over time and losing its threatening effect.

The present invention was developed in view of the current problem.The present invention uses a small amount of wind power to comprehensively and irregularly create threatening elements for birds, such as flashes, sounds, and close visibility. The object of the present invention is to provide a bird prevention and threat device that can effectively dissipate birds.

(d) Means for Solving the Problem The technical means of the present invention for achieving the above-mentioned object is to attach the top of the sounding tube made of a metal tube whose upper end is closed with a lid having a hanging ring at the top.
A windmill whose rotating blade surface is mirror-finished is provided, a pendulum is suspended near the lower end of the sounding tube, and a weight heavier than the pendulum is suspended below the pendulum. A threat plate imitating the eye shape or appearance of a natural enemy bird or animal is suspended below the weight.

(e) Effect The present invention, which has such a technical configuration, has a windmill whose rotating blade surface is mirror-finished on the top of the sounding tube, so that the windmill can easily rotate even in the weak wind and generate rotational noise. As the sound is generated, the light rays are strongly reflected by the rotation of the twisted rotary blades and scattered in multiple directions in the form of flashes, and because the sound tube is installed at a high location, the flash works over a wide range of cultivated land.
A pendulum is suspended near the lower end of the sounding tube made of a metal tube whose upper end is closed with a lid, and a weight heavier than the pendulum is suspended below the pendulum. However, since a warning board with the eye shape or appearance of the natural enemy bird or animal is hung below the weight, the warning board sways due to wind pressure, creating a sense of threat from the close proximity of the natural enemy. The weight is swayed due to the sway of the sense of threat, but since the weight is heavy, an inertial force is applied to it, and the pendulum inside the sounding tube is swung by this inertial force, shaking the sounding tube and emitting a threatening sound. It will be done. Furthermore, once inertia is applied to the weight, even if the temporary wind stops, the inertia of the weight causes the pendulum to repeatedly swing for a while, producing a continuous warning sound, and the warning board suspended below. The unrest will continue.

(F) Embodiment An embodiment of the present invention will be described below based on the drawings. Fig. 1 is a partially cutaway sketch of the invention, and Fig. 2 is a usage diagram, in which the sounding tube body 1 is arranged as required. diameter,
Using thick and long metal pipe material, there is a hanging ring 2 on the top.
It is formed by closing the upper end 1A of the lid 2 with a shape of A by welding or the like, and the threatening sound emitted by the sounding tube 1 is made by birds such as hawks and falcons, which are the natural enemies of birds that cause feeding damage. It is desirable to maintain sound quality close to that of a singing voice as well as sound pressure that can propagate over long distances.
According to the inventor's several experimental results, the metal tube material used for the sounding tube body 1 is an iron pipe with a wall thickness of 2 to 3 mm.
mm, outer diameter 60 to 70 mm, and length 50 to 70 cm are most suitable. A windmill 3 made of a lightweight and highly rigid material such as a hard synthetic resin plate or an aluminum plate is attached to the upper part of the sounding tube body 1, and the windmill 3 rotates with a slight breeze. There are no particular restrictions on the structure of the rotary blade 3A, but the surface of the rotating blade 3A may be coated with aluminum powder, laminated with aluminum foil, etc., or coated with nickel, etc. It is important to apply a mirror finish such as chrome plating. Of course, as long as the light reflecting ability is sufficiently enhanced, various colors may be appropriately combined in terms of hue.

Inside the sounding tube body 1, a pendulum 4 made of a highly hard material is attached to a suitable suspension string 5 at a position near its lower end 1B.
A weight 6, which is heavier than the pendulum 4, is suspended below the pendulum 4 via a similar suspension string 5.
is hanging. This weight 6 is naturally suspended below the lower end 1B of the sounding tube body 1, but there are no particular restrictions on its hanging position, and it is normally sufficient to hang it approximately 30 to 50 cm from the lower end 1B. Further, below the weight 6, an intimidation plate 7, which has the eye shape and appearance of the natural enemy copied thereon and whose overall weight is lighter than the weight 6, is suspended via a suitable hanging cord 5. The threat plate 7 is made of a plate structure that is relatively lightweight and easily shaken by wind pressure, such as a plate structure made of synthetic resin plate material or synthetic resin film material that is welded and inflated by injecting air into the interior. be done.

The weight 6 swings the pendulum 4 and generates a threatening sound when the inertia force is applied to the warning plate 7 even when there is no wind pressure.
In order to maintain the oscillation inertia that can sustain the oscillation, it is preferable that the weight of the weight 6 is at least twice the weight of the pendulum 4 and the intimidation plate 7, preferably about 3 to 5 times.

When using the present invention constructed in this manner, the support arm B at the upper part of the support post A erected in cultivated land and the suspension ring 2A of the present invention are tied together with an appropriate rope or string as shown in Fig. 2. It's fine if you hang it.

(G) Effect The present invention has the above-mentioned configuration, and since a wind turbine whose rotating blade surface is mirror-finished is installed on the upper part, it rotates even in the slightest breeze, and as the rotating blade twists, light rays are emitted. It is strongly reflected and scattered in the form of flashes in many directions, and since it is installed at a high place, the flash can be used as a threat over a long distance, and even the rotating sound can be used as a threat nearby. A pendulum is suspended near the lower end, a weight is suspended below the pendulum, and an intimidation plate imitating the eye shape or appearance of a natural enemy is suspended below the weight. Since the warning plate is formed in multiple layers, as the warning plate is shaken by wind pressure etc., oscillation inertia is applied to the weight, and even if the wind stops, the oscillation inertia of the weight will prevent the pendulum from swinging. Since the threat sound produced by the strike and the movement of the threat board are sustained, the combination of acoustic threat and natural enemy proximity threat significantly increases the threat effect, and these threat elements are mixed in a complex manner, making it difficult for birds to It is a bird prevention device that is difficult to get used to and has many features such as being able to demonstrate excellent bird prevention effects.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway diagram of the present invention, and FIG. 2 is a diagram of its use. Explanation of symbols, 1...Sounding tube body, 1A...Top end,
1B...lower end, 2...lid, 2A...hanging ring, 3...
...Windmill, 3A... Rotating blade, 4... Pendulum, 5...
Hanging cord, 6... weight, 7... threat board.

Claims (1)

[Scope of utility model registration request] A windmill whose rotating blade surface is mirror-finished is attached to the top of a sounding tube body made of a metal tube whose upper end is closed with a lid having a hanging ring at the top.
In addition, a pendulum is suspended near the lower end of the sounding tube, and a weight heavier than the pendulum is suspended below the pendulum, and further below the weight is the eye shape or appearance of the natural enemy bird or beast. What is claimed is: 1. A bird prevention and threat device characterized by a structure in which a threat plate is suspended, and the overall weight is lighter than that of a weight.