JP7569967B2 - Bird and animal repellent device - Google Patents

Description

The present invention relates to a bird and animal repellent device that repels birds and animals that feed on agricultural crops in farm fields, etc.

As for damage to agricultural crops caused by wild birds and animals, while the area of cultivated land in Japan is decreasing, there has been no significant change in the total area of damage from year to year, which indicates that the proportion of the area of damaged areas is increasing. The damage caused to agricultural crops exceeds 17 billion yen per year, and necessary measures are needed. In addition to damage caused by deer, wild boars, crows, monkeys, etc., damage caused by ducks is also serious, and due to their habits, they are particularly active at night, causing damage to agricultural crops in succession. Ducks have the habit of flying into fields at night when no agricultural work is being done to feed, and it is not easy to take measures to repel them.

Conventionally, the device disclosed in Patent Document 1 has been known as a method for preventing bird and animal damage.

Japanese Patent Application Publication No. 6-233644

Patent Document 1 relates to a method for controlling bird and animal damage using laser light, and aims to prevent bird and animal damage by emitting laser light emitted from a laser light source into the air in a specified direction. However, in the method of Patent Document 1, it is planned to apply high-power lasers such as helium-neon lasers, carbon dioxide lasers, and ultraviolet lasers to the laser light oscillator itself, and to prevent danger, the laser light source 1, reflecting mirrors 3 and 4, polygon mirror 2, and other devices are housed in a main body case 6 and emitted into the air in this state. For this reason, the air emission angle from the polygon mirror 2 is set to only about 90 degrees, and the emission area of the laser light is limited, so that the prevention of damage to ducks and the like when emitting laser light into a field is insufficient. In addition, even if a polygon mirror with a polygonal outer periphery is used, there is a risk that ducks will learn the emission pattern into the field by the laser light emission if it rotates only in one direction, and even if the ducks escape once due to the laser light emission, they will return at a short interval and repeat predation. Furthermore, in the method of Patent Document 1, the laser light hits the target in a point-like manner, and the laser light is reflected by a polygonal mirror to strongly stimulate the cornea of the bird or animal's eye, so there are doubts about the effectiveness of projecting the laser light onto the eyes of individual birds. In addition, there is the problem that expensive monitoring equipment and large-scale facilities increase the financial burden on users.

The present invention was made in consideration of the above-mentioned problems in the conventional technology, and one of its objectives is to provide a bird and animal repellent device that can prevent bird and animal damage over a wide area with a simple configuration and short operation time. Another objective of the present invention is to provide a bird and animal repellent device that can ensure the effectiveness of repellency by emitting laser light over a wide area and in a planar manner to the target area in a field or the like to be repellented.

In order to solve the above problems, the present invention includes a laser light oscillator 10, a plate-shaped laser beam forming means 30 that passes the laser light 2 emitted from the oscillator 10 as a plate-shaped laser beam 11 through a slit hole 12 that is long in one direction, and an external rotating reflector device 50 that is located in an external vicinity position on the back side of the slit hole after passing through the slit hole 12 and reflects the plate-shaped laser beam 11 that has passed through the slit hole 12 while rotating integrally with a rotating shaft 52 that is installed along the longitudinal direction of the slit hole , and the plate-shaped laser beam forming means 30 preferably includes a housing 3 having a closed chamber 9, an internal rotating reflector device 40 that is provided in the closed chamber 9 of the housing 3 and reflects the laser light 2 emitted from the laser light oscillator 10 while rotating integrally with the rotating shaft 42, and a slit hole 12 that is long in one direction and is provided on a wall surface 3a of the housing 3 and passes the laser light reflected by the internal rotating reflector device 40 .

The internal rotating mirror device 40 includes a first reflector 41 that is supported by a first rotating shaft 42 that is provided in the housing 3 and has a rotation axis 42a that intersects with the direction of radiation of the laser light 2 emitted from the laser light oscillator 10, and rotates integrally with the first rotating shaft while reflecting the laser light to form the orbiting flat thin beam 11. The slit hole 12 is preferably provided in the housing wall surface 3a at a position corresponding to the orbital position of the orbiting flat thin beam 11, which is the wall surface of the housing that is hit in the direction of the path of the laser beam from the laser light oscillator 10.

In addition, in this case, the rotating shaft 42 supporting the first reflecting mirror 41 is preferably attached at a position (3e) close to one of the walls of the housing 3 along the emission direction of the laser beam 2 emitted from the laser light oscillator 10.

Furthermore, the first reflector 41 of the internal rotating mirror device 40 is a reflector attached so as to rotate integrally with the horizontal axis (42), and the second reflector 51 of the external rotating mirror device 50 is a reflector attached so as to rotate integrally with the vertical axis (52).

In addition, it is preferable that the first and second reflecting mirrors 41 and 51 are plane mirrors.

Furthermore, the external rotating mirror device 50 may be provided with a beam radiation path securing device 80 that moves the external rotating mirror (51) so as to laterally shift the rotation axis 52a of the second reflector 51 from the center line 12a of the slit hole 12 to deviate it from the traveling path of the laser beam.

The bird and animal repellent device of the present invention can radiate laser light in a planar manner onto a target area, repelling harmful birds and animals from a field, simply by operating the device for a short period of time at intervals of several tens of minutes. In addition, since the laser light can be radiated over a wide area in a field or the like, the effectiveness of repelling harmful birds and animals can be ensured. Furthermore, the device can be constructed at low cost due to its simple configuration.

1 is a partially cutaway explanatory side view of a bird and animal repellent device according to an embodiment of the present invention; FIG. 2 is a front view of the bird and animal repellent device of FIG. 2 is a view of the bird and animal repellent device of FIG. 1 taken along line AA. FIG. 2 is a partially cutaway plan view illustrating the bird and animal repellent device of FIG. 1; FIG. 2 is a perspective view of the bird and animal repellent device of FIG. 1; FIG. 2 is a partially cutaway side view illustrating the bird and animal repellent device of FIG. 1 for explaining its function. FIG. 2 is a front view illustrating the operation of the bird and animal repellent device of FIG. 1 . 2A to 2E are schematic explanatory plan views of the laser beam emission area of the external rotating reflecting mirror device of the bird and animal repellent device of FIG. 1.

Below, an embodiment of the bird and animal repellent device of the present invention will be described with reference to the attached drawings, but the present invention is not limited to the configuration of the embodiment, and other embodiments may be used within the scope of the essence of the invention described in the claims. The bird and animal repellent device of the present invention is used to prevent birds and animals from approaching farm fields at night, other agricultural crop planting areas, fish and shellfish farming areas, and other areas where birds and animals should not run rampant or fly in, by using laser light.

The figures show one embodiment of the present invention, with Fig. 1 being a partially cutaway side view of the bird and animal repellent device 1 of the present invention, Fig. 2 being a front view of the device 1, and Fig. 4 being a partially cutaway plan view of the device 1.

In the embodiment of the present invention shown in the figures, an example is given of a repellent device for preventing feeding damage caused by ducks at night in fields where lotus roots and the like are grown. In Figs. 1, 2 and 4, the bird and animal repellent device 1 of the present invention includes a laser light oscillator 10, a plate-shaped laser beam forming means 30, and an external rotating reflector device 50. The laser light oscillator 10 is a laser light oscillation means that uses light amplified radiation by stimulated emission (Light Amplification by Stimulated Emission of Radiation) and generates coherent light. The laser light oscillator 10 places the optically amplified light between a gas or semiconductor reflecting element medium, and causes it to travel back and forth, accumulating high light energy while oscillating and resonating. In the embodiment, a semiconductor laser is used as a solid-state laser.

In Figs. 1, 2 and 4 showing the embodiment, a laser beam oscillator 10 is disposed in a rectangular iron housing 3 having an opening and closing part for mounting (not shown). The rectangular housing 3 has a closed chamber 9 inside, and the laser beam oscillator 10 is disposed in this closed chamber 9. The laser beam oscillator 10 has an exit port 4 for the generated laser beam. An operation table 14 is provided at the bottom of the rectangular housing 3 so that the entire housing 3 can be tilted in the direction a around the vertical axis and in the swing direction b. The laser beam oscillator 10 does not need to be installed inside the housing, and may be disposed outside the housing and its laser beam taken into the housing to form a plate-shaped laser beam.

The plate-shaped laser beam forming means 30 is a means for generating and extracting the laser light 2 emitted from the oscillator 10 as a plate-shaped beam having a required thickness. In the embodiment, the plate-shaped laser beam forming means 30 includes a housing 3 having a closed chamber 9, an internal rotating reflector device 40, and a slit hole 12 long in one direction. The slit hole 12 passes the laser light emitted from the oscillator 10 as a plate-shaped laser beam 11. In the embodiment, the rectangular housing 3 has three pairs of opposing walls 3a, 3b, 3c, 3d, 3e, and 3f, and the laser light oscillator 10 is installed in the closed chamber 9 near the rear wall 3b. A vertically long slit hole 12 is provided in the front wall 3a, which is the direction of laser radiation. The slit hole 12 is provided at approximately the center position of the front wall 3a. The slit hole 12 is a long slit hole in one direction that passes the laser light reflected by the internal rotating mirror device 40, and directly forms the plate-shaped laser beam 11 that passes through it.

In Figures 1 to 3, an internal rotating reflector device 40 provided in a housing 3 having a closed chamber 9 includes a first reflector 41. Since laser light travels straight without diverging, a function is required to convert the laser beam projected as a point into a plate-shaped beam.

The internal rotating mirror device 40 is a laser beam rotating reflection means that reflects the laser beam emitted from the laser beam oscillator while rotating together with the rotating shaft. More specifically, it includes a first rotating shaft 42 provided in the housing, and a first reflecting mirror 41 attached to the first rotating shaft and rotating together with the first rotating shaft. The first rotating shaft 42 is attached across the left and right side walls of the housing 3 inside the housing 3 so that the direction of rotation is a direction intersecting with the radiation direction of the laser beam 2 emitted from the laser beam oscillator 10. The first rotating shaft is rotatably provided via a bearing (not shown), and in the embodiment, a support plate (not shown) is fixed at its center to the first rotating shaft 42. The first reflecting mirror 41 is fixed to one or both sides of the support plate in a face-to-face manner with the reflecting surface facing outward. As a result, the first reflecting mirror rotates together with the first rotating shaft 42 as the first rotating shaft 42 rotates. Although not shown, a motor connected to the first rotating shaft 42 is attached to the outside of the side wall of the housing 3 and is provided alongside the housing to rotate the first rotating shaft 42. At this time, the first reflecting mirror 41 reflects the laser beam from the laser light oscillator 10 while rotating it around its axis to form a circulating flat thin plate-like beam 11 (see FIG. 6). In the embodiment, the first rotating shaft 42 and the first reflecting mirror 41 are attached closer to the top wall 3e than the middle position of the housing from the top to the bottom.

The beam formed by reflection by the first reflecting mirror 41, depending on the axial position of the first rotating shaft 42 of the internal rotating mirror device 40 and the slight play in the longitudinal direction of the rotating shaft, is formed as a plate-shaped beam having a thickness of about several millimeters, that is, an orbiting thin plate-shaped beam.

In the embodiment, the internal rotating mirror device 40 further includes a fixed mirror 44. The fixed mirror 44 is arranged in a corner lower than the middle of the top and bottom and close to the wall 3a on the other end side facing the laser light oscillator 10, and is set so that the laser beam emitted from the oscillator 10 hits the first reflecting mirror 41 rotating diagonally above. As a result, the first reflecting mirror 41 reflects the laser beam from the fixed mirror 44 while rotating around its axis, forming a revolving flat thin beam 11. The revolving flat thin beam 11 is formed by converting the laser beam reflected by the mirror surface of the first reflecting mirror 41 into a revolving flat thin beam 11 having a constant thickness while the first reflecting mirror 41 is continuously rotated.

The rotating shaft 42 supporting the first reflecting mirror 41 is attached to a position close to one of the walls along the direction of emission of the laser beam emitted from the laser light oscillator 10. This allows the laser beam from the rotating first reflecting mirror to pass efficiently through the slit hole 12 on the front wall 3a side, and the first rotating shaft portion is positioned in the path of the laser beam so as not to impede its passage through the slit hole 12.

In this embodiment, the first reflecting mirror 41 is composed of two plane mirrors attached back-to-back to the rotation axis via a support plate (not shown). Note that only one of the plane mirrors may be used. Furthermore, instead of plane mirrors, a curved convex mirror, polygonal mirror, or multi-faceted mirror may also be used.

On the other hand, the slit hole 12 is a wall surface of the housing that abuts in the extension direction of the laser beam from the laser light oscillator 10, and is provided on the front wall 3a of the housing at a position corresponding to the rotation position of the circulating flat sheet-like beam 11. The slit hole 12 is a means for passing the circulating flat sheet-like beam 11 generated by the first reflecting mirror 41 of the internal rotating reflecting mirror device 40 and directing it outside the housing to directly form the sheet-like laser beam 11. In the embodiment, the slit hole 12 is, for example, a vertically elongated hole with a width of about 6 mm and a vertical length of about 34 mm, and the longitudinal direction is arranged along the vertical direction. Note that the size of the slit hole is not limited to this embodiment, and the width and length may be larger. The slit hole 12 may be formed in an oblique direction at a certain angle less than 90 degrees from the vertical direction. The slit hole 12 may be a rectangular slit hole, or may be formed with R-shaped both longitudinal ends.

The external rotating mirror device 50 is a means for rotating a reflector around a rotation axis installed along the longitudinal direction of the slit hole 12 to reflect the circulating flat thin beam 11 that has passed through the slit hole 12 and radiate the reflected beam directly toward the farm field or cultivation area to be protected. The external rotating mirror device 50 includes a second rotating shaft 52 and a second reflector 51 that is integrally attached to the second rotating shaft via a machine frame 53.

In this embodiment, a second rotating shaft 52 is provided rotatably in parallel with the longitudinal direction of the slit hole 12, i.e., in the vertical direction, immediately in front of the front wall 3a of the housing 3 in which the slit hole 12 is provided, and a second reflecting mirror 51 is attached to one side of a machine frame 53 attached to this second rotating shaft. As a result, the second reflecting mirror 51 rotates integrally with the second rotating shaft around the axis of the second rotating shaft 52, i.e., around the vertical axis.

In this embodiment, the first reflector 41 of the internal rotating mirror device 40 is a reflector attached to rotate integrally with the horizontal axis serving as the first rotating shaft 42, and the second reflector 51 of the external rotating mirror device 50 is a reflector attached to rotate integrally with the vertical axis serving as the second rotating shaft 52. As a result, a flat thin plate-shaped beam 11 having a surface in the left-right direction is taken out from the slit hole 12, and by continuously reflecting it while rotating by the second reflector 51 rotating around the vertical axis, the plate-shaped beam is scanned and moved in a sector-like manner in the horizontal direction from the emission direction, making it possible to emit or irradiate the laser beam over the entire target farm field, cultivation area, etc.

The external rotating mirror device 50 is a reflector means that reflects the plate-shaped laser beam 11 that has passed through the slit hole 12 while rotating integrally with the rotation axis. In the embodiment, the external rotating mirror device 50 includes a second rotation axis 52 and a second reflector 51.

The second rotating shaft 52 is supported by a bearing (not shown) and is rotatable along the longitudinal direction of the slit hole, i.e., the vertical direction, at a position near the outside on the back side of the slit hole 12 in the direction in which the laser beam passes. The second reflecting mirror 51 is attached to the machine frame 54 attached to this second rotating shaft 52, so that it rotates integrally with the second rotating shaft 52.

In the embodiment, the external rotating reflector device 50 includes a beam radiation path securing device 80. The beam radiation path securing device 80 is a beam radiation path securing means that moves the external rotating reflector as the second reflector 51 so as to shift the rotation axis 52a of the second reflector 51 in the horizontal direction (k direction), i.e., left and right, from the vertical center line 12a of the slit hole in order to shift it from the traveling direction path of the laser beam that is long in one direction.

1, 2, 6, and 7, an upper plate 55 having a protruding portion 56 protruding in a canopy shape from the top surface of the housing 3 toward the front side is fixed. A receiving base portion 57 is fixed to the lower surface of the upper plate 55 opposite the protruding portion 56, protruding from the lower portion of the housing 3 toward the front side. In the embodiment, the beam radiation path securing device 80 includes a lateral guide mechanism 60 for the second rotating shaft 52 and a drive mechanism 70 for driving the second rotating shaft 52 in the lateral direction.

1, 2, 6, and 7, a U-shaped movable frame 61 is provided between the protruding portion 56 and the receiving base portion 57 so as to be freely slidable in the lateral direction, i.e., horizontal direction. The movable frame 61 is integrally formed as a U-shaped frame body so as to open to the front side in a side view of the device as shown in Figs. 1 and 6. That is, the movable frame 61 is composed of a U-shaped frame body in which a standing wall 61a arranged in a face-matching manner in a position closely facing the front wall of the housing 3 and upper and lower walls 61b, 61c protruding forward from the upper and lower ends of the standing wall are integrally fixed. A through hole 66 is drilled as a through hole at a position approximately at the center of the standing wall 61a and facing the vertically elongated slit hole 12 drilled in the front wall 3a of the housing 3. The movable frame 61 is provided so as to be freely movable in the left-right direction in a front view as shown in Fig. 7. In FIG. 7, the moving frame 61, the protruding portion 56, and the receiving base portion 57 are provided with a moving guide mechanism (not shown) for guiding the moving forward and backward movement in the horizontal direction, i.e., in the direction intersecting with the traveling direction of the laser beam. A second rotating shaft 52 is provided vertically in the space between the opposing upper and lower plates of the U-shaped moving frame 61 so as to be rotatable about the vertical axis. Furthermore, a second reflecting mirror 51 having one side as a reflecting surface is attached to a machine frame 54 attached to the second rotating shaft 52. The second reflecting mirror 51 is provided in a position close to the through hole 66 of the U-shaped moving frame 61, on the rear side directly after the plate-shaped laser beam passes through the slit hole 12 and the through hole 66. In the embodiment, the axis line of the slit hole 12 and the vertical center line of the second reflecting mirror are set at mutually offset positions. Note that this setting position may be set to a position where the axis line of the slit hole 12 and the vertical center line of the second reflecting mirror coincide with each other by providing a beam radiation path securing device 80.

In FIG. 4, two guide pins 62, 62 are provided at a distance from each other on the protruding portion 56 of the upper plate 55. A support plate 64 having two parallel long holes 63, 63 into which the guide pins 62, 62 are loosely inserted is provided so as to be freely slidable on the upper plate 55. A drive motor 65 is attached to the support plate 64, and its rotating shaft is connected to the second rotating shaft 52 via a connecting portion (not shown) on the upper plate of the U-shaped moving frame 61 to rotate the second rotating shaft 52 and simultaneously rotate the second reflecting mirror 51.

In this embodiment, the two parallel long holes 63 in the support plate 64 are opened in a direction perpendicular to the traveling direction of the plate-shaped laser beam. The two guide pins 62, 62 in the protruding portion 56 of the upper plate 55 are loosely inserted, so that the support plate 64 can move freely in the horizontal direction while being guided by these guide pins.

The lateral guide mechanism 60 includes a guide pin 62 erected on the protruding portion 56 of the upper plate 55, and a long hole 63 in a support plate 64 that is loosely inserted into the guide pin 62 and that carries the drive motor 65. The upper plate portion of the U-shaped moving frame 61 and the support plate 64 of the drive motor 65 are connected via a connecting member, and a movement hole for this connecting member is provided in the upper plate 55.

The drive mechanism 70 of the beam radiation path securing device 80 is a means for directly securing the beam radiation path by shifting the second rotation axis 52 in the lateral direction while shifting the rotation axis of the second reflecting mirror 51 in the lateral direction, and in the embodiment, includes a plurality of springs 67, 68 that urge the support plate 64 of the drive motor 65 in the k direction, a fixed piece 69, and a solenoid 71. In the embodiment, a coil spring is used, and one end of the spring 67 is connected to the fixed piece 69 to the protruding portion 56 of the upper plate 55, and the other end is fixed to the support base 65 of the motor. In addition, one end of the spring 68 is fixed to the other end of the support base that faces the support base 65 and the other end is connected to the solenoid 71. Then, by turning on and off the electrical connection to the solenoid, the support base 65 of the drive motor 64 can shift the second rotation axis and the rotation axis of the second reflecting mirror 51 in the lateral direction via the retraction and return operations of the spring 68. The solenoid 71 is designed to repeatedly turn electricity on and off at intervals set by the timer.

As a result, a flat, thin plate-like beam 11 with a surface on the left and right side is extracted from the vertically long slit hole 12, and by continuously reflecting this while rotating by the second reflector 51 which rotates around the vertical axis, the plate-like beam is scanned and moved in a sector-like manner horizontally in the emission direction, making it possible to emit or irradiate the laser beam over the entire target farm field, cultivation area, etc.

Next, the operation of the bird and animal repellent device 1 according to an embodiment of the present invention will be described. In Figures 1, 4 and 6, a laser beam emitted from a laser light oscillator 10 provided on the lower side near the bottom wall 3f of the housing 3 is reflected by a fixed mirror 44 of the internal rotating reflector device 40 and projected toward a first reflector 41 rotating about a horizontal axis attached to a position near the top wall 3e inside the housing 3. The reflecting angle of the rotating first reflector 41 changes continuously to form a circulating flat thin plate-like beam 11 having surfaces in the left and right directions as shown by the virtual lines in Figure 6, which is directed toward a slit hole 12 set corresponding to the position where the beam is reflected and travels. After the flat, thin beam 11 passes through the slit hole 12, it hits the reflecting surface of the second reflecting mirror 51 of the external rotating reflecting mirror device 50, which rotates around the vertical axis. The second reflecting mirror 51 continuously reflects the beam as it rotates, scanning and moving the flat, thin beam in a vertical plate shape in a sector-like manner horizontally from the emission direction, making it possible to emit or irradiate the laser beam over the entire target farm field, cultivation area, etc.

Figure 8 is a schematic diagram showing how the plate-shaped laser beam 11 formed by the plate-shaped laser beam forming means 30 passes through the slit hole 12 and is radiated toward the target area by the second reflector 51 of the external rotating reflector device 50. When the reflecting surface of the second reflector 51 is perpendicular to the plate-shaped laser beam 11 in states (a) and (d), the beam is not radiated toward the target area. When the reflecting surface of the second reflector 51 is in the ranges (a)>reflecting surface>180 degrees and 270 degrees>reflecting surface>360 degrees, the beam is effectively radiated toward the target area in front. By rotating each reflector with a motor drive of, for example, 1,800 rpm while emitting a laser beam from the oscillator 10, laser radiation toward the target area in front is realized.

The beam radiation path securing device 80 of the embodiment secures the beam radiation path by shifting the axis 52a of the second rotating shaft 52 in the left-right direction so that the axis 52a of the second rotating shaft 52 of the external rotating mirror device 50 is not positioned on the beam progression path and obstructs the progression after the vertical plate-shaped flat thin plate-shaped beam passes through the slit hole 12. For example, by repeatedly tensioning and releasing the spring 68 in response to the timer time set in the solenoid 71, the entire U-shaped moving frame 61 moves forward and backward in the k direction shown in Figure 7, and by shifting the rotation axis 52a of the second rotating shaft left and right, it is possible to radiate the vertical plate-shaped flat thin plate-shaped beam while scanning it over almost the entire sector-shaped area.

The bird and animal repellent device 1 of the present invention is not limited to the specific configuration of the embodiment described above. For example, the arrangement, number, angle, etc. of the mirrors of the internal rotating reflector device are not limited to the configuration of the embodiment, but may be any that can form a vertical plate-shaped laser beam. Furthermore, the specific configuration of the lateral guide mechanism of the external rotating reflector device is not limited in detail to the configuration of this embodiment.

The bird and animal repellent device realized in the above embodiment includes a laser light oscillator, a plate-shaped laser beam forming means for passing the laser light emitted from the oscillator through a long slit hole in one direction as a plate-shaped laser beam, and an external rotating reflector device that rotates integrally with a rotating shaft installed along the longitudinal direction of the slit hole at an external position near the rear side of the slit hole after passing through the slit hole and reflects the plate-shaped laser beam that has passed through the slit hole. This allows the vertically long plate-shaped laser beam to be scanned and moved in a sector-like manner laterally toward the emission direction, making it possible to emit or irradiate the laser beam over the entire target farm field, cultivation area, etc. Also, a bird and animal repellent device can be realized with a simple configuration and low cost. Furthermore, it is possible to repel the target birds and animals by simply installing the device at the site where the beam is to be emitted and operating it for a short period of about 30 seconds at 30-minute intervals, and the maintenance and management work and costs of the device can be kept simple and low.

The plate-shaped laser beam forming means includes a housing having a closed chamber, an internal rotating mirror device that is provided within the closed chamber of the housing and reflects the laser light emitted from the laser light oscillator while rotating integrally with the rotation axis, and a slit hole that is long in one direction and is provided on the wall surface of the housing to pass the laser light reflected by the internal rotating mirror device, thereby making it possible to realize a bird and animal repellent device with a simple configuration of providing a laser beam reflector within the housing and a slit hole in the housing.

The internal rotating mirror device includes a first reflector that is supported by a first rotating shaft that is provided within the housing and has a rotation axis that intersects with the radiation direction of the laser light emitted from the laser light oscillator, and rotates integrally with the first rotating shaft while reflecting the laser light to form a rotating flat, thin plate-like beam. The slit hole is provided in the wall of the housing that is struck in the extension direction of the laser beam from the laser light oscillator, and is provided in the wall of the housing at a position that corresponds to the rotation position of the orbiting flat, thin plate-like beam. This makes it possible to specifically realize the formation of a plate-like laser beam within the housing and the formation of a slit in the housing with an extremely simple and compact configuration.

In addition, by configuring the rotation axis supporting the first reflector to be attached to a position close to one of the walls of the housing along the emission direction of the laser beam emitted from the laser light oscillator, it is possible to efficiently form a flat, thin beam by taking into account the straightness of the laser light from the laser oscillator and ensuring that the first reflector itself is not in the path of the beam.

Furthermore, by configuring the first reflector of the internal rotating mirror device to be a reflector mounted so as to rotate integrally on the horizontal axis, and the second reflector of the external rotating mirror device to be a reflector mounted so as to rotate integrally on the vertical axis, it is possible to form a flat thin plate-like beam with a vertical plate surface by the internal rotating mirror device, and to perform sector-like scanning movement horizontally in the emission direction by the external rotating mirror device.

In addition, since the first and second reflectors are flat mirrors, the internal rotating mirror device and the external rotating mirror device can be realized using simple and inexpensive parts.

The external rotating mirror device is also configured with a beam emission path securing device that moves the external rotating mirror so as to shift the rotation axis of the second reflector laterally from the center line of the slit hole to deviate it from the traveling path of the laser beam, thereby making it difficult for the plate-shaped laser beam that passes through the slit hole to be concentrated on the second rotation axis of the second reflector of the external rotating mirror device and have its path obstructed.

As described above, the bird and animal repellent device of the present invention emits a vertical plate-shaped laser beam in a sector shape in a wide area to be repellent, so it is possible to reliably repel or evacuate the target bird or animal from the target area.

The bird and animal repellent device of the present invention is not limited to the above-mentioned embodiment, but can also effectively repellent damage caused by nighttime feeding by birds such as crows, and other animals such as deer, wild boars, crows, and monkeys.

1 Bird and animal repellent device 2 Laser light 3 Housing 10 Laser light oscillator 11 Plate-shaped laser beam 12 Slit hole 30 Plate-shaped laser beam forming means 40 Internal rotating reflector device 41 First reflector 42 First rotating shaft 44 Fixed mirror 50 External rotating reflector device 51 Second reflector 52 Second rotating shaft k Horizontal direction (left-right direction)
60: Lateral guide mechanism 61: U-shaped moving frame 62: Guide pin 65: Drive motor 66: Through holes 67, 68: Spring 70: Drive mechanism 71: Solenoid 80: Beam radiation path securing device

Claims (6)

A laser beam oscillator;
a plate-shaped laser beam forming means for passing a laser beam emitted from an oscillator through a slit hole that is long in one direction as a plate-shaped laser beam;
an external rotating reflecting mirror device that rotates integrally with a rotating shaft that is disposed along the longitudinal direction of the slit hole and is located in an external vicinity position on the rear side of the slit hole after the laser beam passes through the slit hole, and reflects the plate-shaped laser beam that has passed through the slit hole ;
The plate-shaped laser beam forming means includes a housing having a closed chamber;
an internal rotating reflecting mirror device that is provided in a closed chamber of the housing and that reflects a laser beam emitted from a laser beam oscillator while rotating integrally with a rotating shaft;
A bird and animal repellent device comprising: a slit hole elongated in one direction, provided on a wall surface of a housing, for passing laser light reflected by an internal rotating reflector device . The internal rotating mirror device includes a first reflecting mirror that is provided in a housing, is supported on a first rotating shaft having a rotation axis that intersects with a radiation direction of a laser light emitted from an oscillator of the laser light, and rotates integrally with the first rotating shaft to reflect the laser light and form a circulating flat thin plate-like beam,
The bird and animal repellent device as described in claim 1, characterized in that the slit hole is provided in the wall of the housing that is hit in the direction of travel of the laser beam from the laser light oscillator, at a position on the wall of the housing that corresponds to the rotation position of the circulating flat, thin beam . 3. The bird and animal repellent device according to claim 2 , wherein the rotation shaft supporting the first reflector is attached to a position close to one of the walls of the housing along the emission direction of the laser beam emitted from the laser light oscillator. The first mirror of the internal rotating mirror device is a mirror mounted for integral rotation on a horizontal axis;
4. The bird and animal repellent device according to claim 2 or 3 , wherein the second reflector of the external rotating reflector device is a reflector mounted so as to rotate integrally with the vertical shaft. 5. The bird and animal repellent device according to claim 4 , wherein the first and second reflecting mirrors are plane mirrors. A bird and animal repellent device as described in any one of claims 1 to 5, characterized in that the external rotating mirror device is provided with a beam radiation path securing device that moves the external rotating mirror so as to shift the rotation axis of the second reflector laterally from the center line of the slit hole to deviate it from the propagation path of the laser beam .

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