Jumbo Tanishi exterminator

Abstract

To provide a golden apple snail extermination device that can lessen a workload and efficiently perform an extermination operation.SOLUTION: The above problem is solved by a golden apple snail extermination device 1 that comprises an attachment part 2 for being fastened to a blade attachment part k1 of a bush cutter K, a rotary shaft part 4 formed integrally with the attachment part 2 and fulfilling a rotary shaft function, a grating blade 10 rotated together with the rotary shaft part 4 so as to grate a cluster of eggs of a golden apple snail, and an attachment part 7 for attaching the grating blade 10 to the rotary shaft part 4.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the giant apple snail.

Background Art

[0002] The giant apple snail (scientific name: Pomacea canaliculata) is widely distributed in almost every prefecture west of Chiba Prefecture, especially in the warm southwestern regions. In areas with particularly high population densities, it has caused serious damage to agricultural and horticultural crops that grow in water, such as rice, water chestnuts, taro, rush, and eelgrass, and has become a problem.

[0003] In addition, the giant apple snail is known to lay a large number of egg masses on the bank walls of waterways and paddy fields and reproduce, which has become a problem in various places as it harms the landscape. Therefore, from the perspective of suppressing damage to crops and protecting the landscape, the control of the giant apple snail has become an important issue.

[0004] Here, in the control work of the giant apple snail, a method of preventing hatching by crushing the egg masses laid on the bank walls is effective. For example, Patent Document 1 discloses a giant apple snail exterminator that allows an operator to hold the handle and use the brush at the tip to rub the bank wall, thereby crushing the egg masses laid on the bank wall.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, the giant apple snail exterminator described in Patent Document 1 requires manual crushing of the egg masses with a brush, which places a heavy burden on the operator and there is room for improvement in work efficiency.

[0007] Therefore, an object of the present invention is to provide a jumbo thistle exterminator that can solve such problems, reduce the work burden, and efficiently perform extermination work.

Means for Solving the Problems

[0008] To achieve the above object, a first invention provides a mounting part fastened to the blade mounting part of a mower, a rotating shaft part integrally formed with the mounting part and serving as a rotating shaft, a crushing blade that rotates together with the rotating shaft part and crushes the egg masses of jumbo thistles, and a mounting part for attaching the crushing blade to the rotating shaft part, and provides a jumbo thistle exterminator.

[0009] A second invention provides, in the first invention above, wherein the mounting part is arranged such that its longitudinal direction is inclined with respect to the longitudinal direction of the rotating shaft part, and the crushing blade is attached to the rotating shaft part by the mounting part such that its surface is inclined with respect to the rotating shaft of the rotating shaft part, and provides a jumbo thistle exterminator.

[0010] A third invention provides, in the second invention above, wherein the mounting part includes a flat plate part, an upper bent part formed by bending the upper end of the flat plate part, a lower bent part formed by bending the lower end of the flat plate part, and insertion holes are respectively formed in the upper bent part and the lower bent part, and the crushing blade is formed of a substantially rectangular sheet of a flexible resin material, a loop-shaped folded part is provided by folding one end side thereof, and the crushing blade is configured to be attachable to the rotating shaft part by inserting an insertion rod, which is a bar-shaped member having a circular cross section formed in a substantially L shape, through the insertion holes and the folded part, and provides a jumbo thistle exterminator.

[0011] A fourth invention provides, in the third invention above, There is provided a jumbo thistle exterminator characterized in that a flange portion projecting horizontally in a disc shape is formed at the lower end of the rotating shaft portion.

[0012] A fifth invention is the above second invention, wherein the mounting portion is bolted and fixed to the rotating shaft portion so that the mounting angle can be changed, There is provided a jumbo thistle exterminator characterized in that the crushing blade is configured such that the inclination angle with respect to the rotating shaft of the rotating shaft portion can be adjusted by adjusting the mounting angle of the mounting portion.

Advantages of the Invention

[0013] According to the first invention described above, by using a mower as a drive source and rotating together with the rotating shaft portion, the crushing blade that crushes the egg masses of jumbo thistles can significantly reduce the working burden on the operator while enabling rapid and efficient extermination of the egg masses of jumbo thistles.

[0014] According to the second invention described above, in addition to the effects of the first invention, since it is attached to the rotating shaft portion so as to have an inclination with respect to the rotating shaft of the rotating shaft portion, when the crushing blade rotates, it can generate an air flow downward and can satisfactorily drop the egg masses of jumbo thistles downward. In addition, a buoyancy force is applied to the rotating shaft portion to reduce the weight of the jumbo thistle exterminator 1 and reduce the working burden on the operator.

[0015] According to the third invention described above, in addition to the effects of the second invention, the crushing blade is formed of a substantially rectangular sheet of flexible resin material, and one end side thereof is folded back to provide a ring-shaped folded portion. By inserting an insertion rod, which is a rod-shaped member having a substantially circular cross-section formed in a substantially L-shape, through the insertion hole and the folded portion, it is configured to be attachable to the rotating shaft portion. With this simple configuration, it becomes easy to attach, detach, and replace the crushing blade to and from the main body of the rotating shaft portion. As a result, the working efficiency is improved. Furthermore, by adopting such a pinning specification, compared with the case of fixing by bolt fastening or the like, even when the crushing blade is strongly pressed against the wall surface, it is possible to absorb the rotational impact, so that the impact is prevented from being transmitted to the weed cutter, and wear and damage of the crushing blade can be prevented.

[0016] According to the fourth invention described above, in addition to the effects of the third invention, a flange portion that protrudes horizontally in a disk shape is formed at the lower end of the rotating shaft portion, thereby preventing the rotating shaft portion from interfering with the bank wall surface, preventing malfunctions, and enabling only the crushing blade to come into contact with the bank wall surface satisfactorily.

[0017] According to the fifth invention described above, in addition to the effects of the second invention, By adjusting the angle of the attachment portion, it becomes possible to adjust the attachment angle and position of the crushing blade, and it also becomes possible to adjust the buoyancy of the rotating shaft portion and the attachment angle and position according to the depth of the bank wall surface.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

[0019] Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of the jumbo dandelion exterminator 1 according to an embodiment of the present invention. In the following, for convenience of explanation, front, rear, up, down, left, and right are defined as shown by the arrow lines in FIG. 1, but these definitions themselves do not limit the configuration of the invention.

[0020] As shown in FIG. 1, the jumbo dandelion exterminator 1 according to the present invention is attached to the blade attachment portion k1 of the mower K instead of the cutting blade 7. Thereby, the jumbo dandelion exterminator 1 is configured to obtain rotational power from the mower K by driving the electric motor k2 of the mower K. Note that the configuration of this mower K may be a general-purpose one (for example, see JP-A-2020-145986). Therefore, the mower K is not limited to the illustrated example, and may be, for example, a gasoline engine type.

[0021] At the upper end of the jumbo dandelion exterminator 1, a mounting portion 2 for mounting the jumbo dandelion exterminator 1 to the blade attachment portion k1 of the mower K is provided. This mounting portion 2 has a rectangular frame shape, and fastening holes 3 for fastening and fixing to the blade attachment portion k1 of the mower K are provided at the upper part thereof.

[0022] FIG. 2 is a front view of the jumbo dandelion exterminator, FIG. 3 is a right side view, and FIG. 4 is a plan view. Below the mounting portion 2, a rotating shaft portion 4 that functions as a rotating shaft when the mower K is driven is provided. The main body of this rotating shaft portion 4 is a hollow frame member with a rectangular cross-section and is integrally formed with the mounting portion 2. Further, at the lower end of the main body of the rotating shaft portion 4, a flange portion 6 that projects horizontally in a disc shape is formed.

[0023] A plurality of through holes 5 are provided in the main body of the rotating shaft portion 4, whereby the weight of the main body of the rotating shaft portion 4 is reduced. As a result, the work burden on the operator is reduced.

[0024] On the left and right circumferential surfaces of the main body of the rotating shaft portion 4, mounting portions 7 for attaching crushing blades 10 for crushing the egg masses of the giant Japanese snail are provided vertically on the left and right respectively. This mounting portion 7 is formed in a substantially U shape by bending the upper and lower parts of a flat bar-shaped metal fitting, and includes a flat plate portion 7a welded to the main body of the rotating shaft portion 5, an upper bent portion 7b formed by bending the upper end of the flat plate portion 7a, and a lower bent portion 7c formed by bending the lower end of the flat plate portion 7a.

[0025] FIG. 5 is a right side view showing the giant Japanese snail exterminator 1 with the crushing blade 10 removed in FIG. 3. As shown in FIG. 5, the flat plate portion 7a is arranged so that its longitudinal direction is inclined by an angle α with respect to the longitudinal direction (axial direction) of the main body of the rotating shaft portion 5. As a result, the crushing blade 10 described later is configured to rotate in a state inclined with respect to the rotating shaft of the rotating shaft portion 4. Here, in the present embodiment, the angle α is approximately 30°, and it is desirable to be provided at 30° to 45°.

[0026] Each of the crushing blades 10 has a substantially rectangular shape and is formed of a substantially rectangular sheet of a flexible resin material. As shown in the partial perspective view represented by the blown-out portion in FIG. 2, one end side (attachment side) is folded back and sewn to the surface of the crushing blade 10 with a sewing thread 10b, thereby providing a ring-shaped folded-back portion 10a. Here, as the material of the crushing blade 10, a pressure-treated vinyl sheet with threads is desirable, but a rubber sheet, a pressure-treated cloth, a canvas sheet, a PE sheet, a PP sheet, etc. can also be adopted.

[0027] Next, the method of attaching the crushing blade 10 to the attachment portion 7 will be described. As shown in the partial perspective view represented by the blown-out portion in FIG. 5, insertion holes 7d and 7e, which are through holes, are provided in the upper bent portion 7b and the lower bent portion 7c, respectively.

[0028] As shown in the explanatory diagram of the assembly procedure represented by the blown-out portion in FIG. 1, the folded-back portion 10a of the crushing blade 10 is aligned with the insertion holes 7d and 7e, which are through holes (STEP1), and the insertion rod 8 is inserted into the insertion holes 7d and 7e together with the folded-back portion 10a (STEP2).

[0029] Here, the insertion rod 8 is a rod-shaped member having a circular cross-section formed in a substantially L shape, and has a bent portion whose upper part is bent at 90°. Thus, when the insertion rod 8 is inserted into the insertion holes 7d and 7e, this bent portion 8 is caught by the upper bent portion 7b and locked. Further, as shown in the partial exploded perspective view represented by the blown-out portion in FIG. 3, a pinning hole 8a is provided in the lower part of the insertion rod 8, and by inserting an R-shaped pin 9 into this pinning hole 8a, the insertion rod 8 can be fixed to the attachment portion 7 (STEP3). By the above procedure, the attachment of the crushing blade 10 to the attachment portion 7 is completed. With such a simple configuration, the attachment and detachment and replacement of the crushing blade 10 to and from the main body of the rotating shaft portion 4 are facilitated. Thereby, the working efficiency is improved. Furthermore, by adopting such a pinning specification, compared with the case of fixing by bolt fastening or the like, even when the crushing blade 10 is strongly pressed against the wall surface, the rotational impact can be absorbed, so that the impact is prevented from being transmitted to the brush cutter K, and wear and damage of the crushing blade 10 can be prevented.

[0030] FIG. 6 is an explanatory diagram of the usage state of the jumbo dandelion exterminator 1 according to the embodiment of the present invention. As shown in FIG. 6, the jumbo thistle exterminator 1 is used such that an operator brings the crushing blades 10 of the jumbo thistle exterminator 1 that rotate by driving the mower K into contact with the bank wall surface L where the egg masses of the jumbo thistle are laid, and appropriately moves them along the bank wall surface L. With such a simple operation, it is possible to quickly and efficiently exterminate the egg masses of the jumbo thistle much more than before. Also, since the mower K is used as a drive source, the work load on the operator is significantly reduced.

[0031] FIG. 7 is an explanatory diagram of the operation and effect of the jumbo thistle exterminator 1 according to an embodiment of the present invention. As shown in FIG. 7, when the crushing blades 10 of the jumbo thistle exterminator 1 that rotate in the rotation direction F come into contact with the bank wall surface L, the crushing blades 10 crush the egg mass J of the jumbo thistle by impact and drop it downward along the bank wall surface L. Since eggs do not hatch in water, dropping them enables more reliable extermination.

[0032] At this time, the crushing blades 10 are attached to the rotary shaft portion 4 such that their surfaces are inclined with respect to the rotary shaft of the rotary shaft portion 4, and are configured to rotate in an inclined state. Thus, when the crushing blades 10 rotate, an air flow W is generated downward, and it is possible to satisfactorily drop the egg mass J of the jumbo thistle downward. In addition, by applying a buoyant force to the rotary shaft portion 4, the weight of the jumbo thistle exterminator 1 can be reduced, and the work load on the operator can be reduced.

[0033] Also, the flange portion 6 prevents the rotary shaft portion 4 from interfering with the bank wall surface L, preventing malfunctions and enabling only the crushing blades 10 to come into contact with the bank wall surface L satisfactorily.

[0034] Note that the present invention is not limited to the above-described embodiment, and various changes and modifications are possible. For example, the mounting portion 7 may be fixed to the rotating shaft portion 4 by bolt fastening instead of welding, and the mounting angle may be changeable. At this time, for example, a plurality of bolt fastening holes with different positions in the vertical, horizontal, front, and rear directions are provided on the left and right side surfaces of the rotating shaft portion 4, respectively, and the mounting portion 7 may be selectively bolt-fastened and mounted to any one of the fastening holes after the operator determines the mounting angle of the mounting portion 7. Thereby, by adjusting the angle of the mounting portion 7, it becomes possible to adjust the mounting angle (or the inclination angle with respect to the rotation axis of the rotating shaft portion 4) and the position of the crushing blade 10, and it also becomes possible to adjust the floating force of the rotating shaft portion 4 and the mounting angle and position according to the depth of the shore wall surface L.

Explanation of Signs

[0035] 1 Jumbo slug exterminator 2 Mounting portion 3 Fastening hole 4 Rotating shaft portion 5 Through hole 6 Flange portion 7 Mounting portion 7a Flat plate portion 7b, 7c Bending portion 7d, 7e Insertion hole 8 Insertion rod 9 R-type pin 10 Crushing blade 10a Folded-back portion 10b Sewing thread K Mower k1 Blade mounting portion

Claims

1. A mounting part fastened to the blade mounting part of a mower, A rotating shaft part integrally formed with the mounting part and serving as a rotating shaft, Crushing blades that rotate together with the rotating shaft part and crush the egg masses of giant Japanese snails, A mounting part for attaching the crushing blades to the rotating shaft part, and a giant Japanese snail exterminator comprising the same.

2. The mounting part is arranged such that its longitudinal direction is inclined with respect to the longitudinal direction of the rotating shaft part, The giant Japanese snail exterminator according to claim 1, wherein the crushing blades are attached to the rotating shaft part by the mounting part such that their surfaces are inclined with respect to the rotating shaft of the rotating shaft part.

3. The mounting part includes a flat plate-like flat plate part, an upper bent part formed by bending the upper end of the flat plate part, a lower bent part formed by bending the lower end of the flat plate part, and insertion holes are formed in the upper bent part and the lower bent part, respectively, The crushing blades are formed of a substantially rectangular sheet of a flexible resin material, and a loop-shaped folded-back part is provided by folding back one end side thereof. The giant Japanese snail exterminator according to claim 2, wherein the crushing blades are configured to be attachable to the rotating shaft part by inserting an insertion rod, which is a bar-shaped member having a circular cross-section formed in a substantially L shape, through the insertion holes and the folded-back part.

4. The giant Japanese snail exterminator according to claim 3, wherein a flange part protruding horizontally in a disk shape is formed at the lower end of the rotating shaft part.

5. The mounting part is bolt-fastened to the rotating shaft part so as to be able to change the mounting angle and fixed, The giant Japanese snail exterminator according to claim 2, wherein the inclination angle of the crushing blades with respect to the rotating shaft of the rotating shaft part can be adjusted by adjusting the mounting angle of the mounting part.

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