Apparatus for spreading granular materials

Abstract

To provide spraying equipment of granular spray material that can laterally, linearly and more evenly spray granular spray materials.SOLUTION: The spray equipment includes: a hopper tank 14 which is installed in a mobile device; a discharger 16 which sequentially makes falling discharge of granular spray materials; an impeller 20 which is rotatably driven by receiving and spraying the granular spray materials; and a spray guide cover 30 which guides the spray direction of the granular spray materials. The spray guide cover 30 is equipped with one side wall guide 32a and the other side wall guide 32b which laterally guide the spray direction of the granular spray materials. The impeller 20 is provided with a disk part 21 and a plurality of fin parts 25 that is installed in a form extending from a rotation axis 22 side of the disk part 21 to the periphery 23. The shape of the fin parts 25 is in the form of concavely receiving air pressure in the rotation direction, in the installation of the impeller.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a granule spraying device comprising a hopper tank provided to store a granular spray material and mounted on a mobile device, a discharging device connected to the hopper tank for sequentially dropping and discharging the granular spray material, an impeller rotatably driven to receive and spray the granular spray material discharged from the discharging device, and a spraying guide cover provided to cover the impeller from above for guiding the spraying direction of the granular spray material.

Background Art

[0002] Conventionally, in a spraying chamber of an aerial sprayer for a radio control helicopter, a side plate for forming a spraying window is detachable from a top plate. In the spraying chamber, a rotating plate is directly supported by a rotating shaft of a motor and constitutes a bottom surface portion of the spraying chamber in this state. A spraying agent passage is constituted by spraying agent passing holes provided in a plurality of plate materials, and a spraying agent supply amount adjusting plate and a shutter plate rotate along these plate materials (see Patent Document 1).

[0003] According to this aerial sprayer for a radio control helicopter, there is an effect that the opening area and the opening direction of the spraying window for discharging the spraying agent can be easily switched to adjust a spraying area on the ground or the like.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem that the conventional device aims to solve is that, with the conventional device, the material is spread in an arc shape in only one direction due to the action of the side plates, which can suppress uneven distribution, but it is difficult to make the distribution concentration more uniform and to distribute the material more efficiently over a wider area.

[0006] Therefore, the object of the present invention is to provide a granular material dispensing device that can dispensing granular material more efficiently and uniformly over a wider area by dispensing it in a more linear manner in the left-right direction. [Means for solving the problem]

[0007] To achieve the above objective, the present invention comprises the following configuration. According to one embodiment of a granular material spreading device according to the present invention, the granular material spreading device comprises a hopper tank provided for storing granular material and mounted on a mobile device, a discharge device connected to the hopper tank for sequentially dropping and discharging the granular material, an impeller that is rotationally driven to receive and disperse the granular material discharged from the discharge device, and a spreading guide cover provided to cover the impeller from above and to guide the direction of dispersal of the granular material, wherein the spreading guide cover is positioned on the front or rear side in the direction of movement of the mobile device and on the outer edge of the impeller Close proximity The impeller is provided with a side wall guide section and a side wall guide section that extend to the left and right and guide the direction of dispersion of the granular material in the left and right directions, and comprises a disc section that rotates to receive the supply of the granular material, and a plurality of fin sections provided in a manner that extends from the side of the rotation axis of the disc section toward the periphery, wherein the shape of the fin sections is provided to receive air pressure in a concave shape in the direction of rotation. The disc portion is provided with a drop hole through which the granular material can pass so that it can fall. .

[0008] Furthermore, according to one embodiment of the granular material dispersing device of the present invention, the discharge port for dropping and discharging the granular material of the discharge device is the top cover portion of the dispersing guide cover, and is characterized in that it is open between the periphery of the disc portion of the impeller, which is close to either the one side wall guide portion or the other side wall guide portion, and the rotation axis of the disc portion, so as to be supplied with the granular material.

[0009] Furthermore, according to one embodiment of the granular material dispersing device of the present invention, a scattering suppression wall is provided that hangs down from a portion of the top cover portion located on the side of one side wall guide portion or the other side wall guide portion that is not close to the position of the discharge port, and the scattering suppression wall is provided that suppresses the scattering of the granular material in a manner corresponding to the upstream portion of the airflow generated by the rotation of the impeller, from the portion of the impeller's periphery that is close to the one side wall guide portion or the other side wall guide portion.

[0010] Furthermore, according to one embodiment of the granular material dispersing device of the present invention, one fixed guide vane is provided that hangs down from the top cover portion at a position immediately downstream of the position of the discharge port in the airflow generated by the rotation of the impeller, and extends left and right with respect to the direction of movement of the moving device to guide the granular material to be dispersed in one direction to the left and right; and another fixed guide vane is provided that hangs down from the top cover portion at a position diagonally opposite to the first fixed guide vane with respect to the axis of rotation, and extends left and right with respect to the direction of movement of the moving device to guide the granular material to be dispersed in the other direction to the left and right.

[0011] Furthermore, according to one embodiment of the granular material dispensing device of the present invention, a flap device is provided at each of the left and right ends of the dispensing guide cover so as to be able to adjust the dispensing angle in the vertical direction. Furthermore, according to one embodiment of the granular material dispersing device of the present invention, the disc portion of the impeller is characterized by having an auxiliary fin portion provided in addition to the fin portion, and / or a dropping hole from which the granular material can be dropped.

[0012] Furthermore, according to one embodiment of the granular material dispersing device of the present invention, the mobile device is characterized by being a drone. [Effects of the Invention]

[0013] The granular material dispensing device according to the present invention offers a particularly advantageous effect: by dispensing the granular material in a more linear fashion in the left-right direction, it can be distributed more efficiently and uniformly over a wider area. [Brief explanation of the drawing]

[0014] [Figure 1] This is a front view showing an example of a drone equipped with a granular material dispersing device according to the present invention. [Figure 2] This is a perspective view from the bottom side showing an example of the form of a granular material dispensing device according to the present invention. [Figure 3] This is a perspective view from the bottom side, showing the impeller removed from the example configuration in Figure 2. [Figure 4] This is a perspective view from the planar side, showing the impeller removed from the example configuration in Figure 2. [Figure 5] This is a bottom view showing the impeller attached to the example configuration in Figure 2. [Figure 6] This is a bottom view showing the impeller removed from the example configuration in Figure 2. [Figure 7] This is a cross-sectional view showing the example morphology in Figure 2, with the left and right sides broken through the center. [Figure 8] This is a schematic plan view illustrating an example of the dispersal of granular material (seed rice) in a paddy field by a drone equipped with a granular material dispersing device according to the present invention (a), and an example of the dispersal of granular material by a drone equipped with a conventional granular material dispersing device (b).

Best Mode for Carrying Out the Invention

[0015] Hereinafter, a form example of a granule spraying device according to the present invention will be described in detail based on the accompanying drawings (Figs. 1 to 8). This granule spraying device can be used by being mounted on a moving device such as a drone (unmanned aerial vehicle) that can fly by wireless control or automatic control using GPS (Global Positioning System) or a wireless communication network. Note that the moving device according to the present invention includes vehicles that travel on the ground, including agricultural machines such as tractors. In addition, examples of the granule spraying material targeted in the present invention include paddy rice seeds for direct seeding, granular fertilizers, and chemicals.

[0016] As shown in Figs. 1 and 2 as a basic configuration, the granule spraying device according to the present invention includes a hopper tank (storage container) 14 provided so as to store granule spraying materials and mounted on a moving device (in this form example, drone 10), a discharge device 16 connected to the hopper tank 14 to sequentially drop and discharge granule spraying materials, an impeller 20 (see Fig. 2, etc.) that is rotationally driven to receive and spray the granule spraying materials discharged from the discharge device 16, and a spraying guide cover 30 provided so as to cover the impeller 20 from above to guide the spraying direction of the granule spraying materials.

[0017] Note that the drone 10 of this form example has a general configuration such as a main body 11, propellers 12, and legs 13 as shown in Fig. 1. In addition, an existing discharge device 16 including a mechanism and driving means for sequentially discharging granule spraying materials, and a driving device including a driving motor for the impeller 20 that diffuses granule spraying materials can be used. In this form example, the driving devices for the discharge device 16 and the impeller 20 are integrally unitized into a discharge and spraying drive unit 15. Further, at the connection port of the discharge device 16 to the hopper tank 14, as shown in Fig. 2, etc., a stirring coil 16b that is rotated by a stirring motor 16a and operates in the hopper tank 14 to prevent the granule spraying materials from clogging is arranged.

[0018] In the granule spraying device according to the present invention, as shown in FIGS. 2 to 7, the spraying guide cover 30 is located on the front side or the rear side in the moving direction (flying direction) of the moving device (in this exemplary embodiment, the drone 10), and is provided along the outer peripheral edge of the impeller 20 (in this exemplary embodiment, the peripheral edge 23 of the disk portion 21) so as to extend left and right, and includes one side wall guiding portion 32a and the other side wall guiding portion 32b that guide the spraying direction of the granule spraying material in the left and right directions. Close proximity In the spraying guide cover 30 of this exemplary embodiment, in addition to the configuration of the top surface cover portion 31, one side wall guiding portion 32a, and the other side wall guiding portion 32b, it is formed by plate-shaped components including a flap plate 41 described later, and is formed into a rectangular box shape that is longer in the left and right directions than in the front and rear directions (flying direction) of the drone 10, and is provided so as to be used in a form where the box body is laid down. Further, the top surface cover portion 31 of the spraying guide cover 30 is formed in a form in which the left and right end portions are gently inclined downward with respect to the central portion in the left and right directions, and is provided in a form that guides the spraying direction of the granule spraying material obliquely downward at a shallow angle.

[0019] In the spraying guide cover 30 of this exemplary embodiment, in addition to the configuration of the top surface cover portion 31, one side wall guiding portion 32a, and the other side wall guiding portion 32b, it is formed by plate-shaped components including a flap plate 41 described later, and is formed into a rectangular box shape that is longer in the left and right directions than in the front and rear directions (flying direction) of the drone 10, and is provided so as to be used in a form where the box body is laid down. Further, the top surface cover portion 31 of the spraying guide cover 30 is formed in a form in which the left and right end portions are gently inclined downward with respect to the central portion in the left and right directions, and is provided in a form that guides the spraying direction of the granule spraying material obliquely downward at a shallow angle.

[0020] Note that in this exemplary embodiment, the spraying guide cover 30 is in a form in which a rectangular box body with a U-shaped cross section is laid down by the top surface cover portion 31, one side wall guiding portion 32a, and the other side wall guiding portion 32b, but it is not limited to this. That is, the lengths of the guiding surfaces (inner surfaces) respectively constituted by the top surface cover portion 31, one side wall guiding portion 32a, and the other side wall guiding portion 32b are extended along the tangential direction of the disk portion 21 of the impeller 20, and may be formed only in the direction in which the granule spraying material is sprayed along with the rotation direction of the impeller 20 at least. The lengths of the one side wall guiding portion 32a and the other side wall guiding portion 32b may be provided, for example, substantially about half the length compared with this exemplary embodiment.

[0021] Furthermore, in the granular material spreading device according to the present invention, the impeller 20 comprises a disc portion 21 that rotates to receive the supply of granular material, and a plurality of fin portions 25 that extend from the side of the rotation axis 22 of the disc portion 21 to the periphery 23, and the shape of the fin portions 25 is such that it receives air pressure in a concave shape in the direction of rotation (see the direction of the arrows in Figures 3, 4, and 5). In other words, the fin portions 25 are formed in a concave shape that scoops in air and are arranged to rotate in a direction that is more susceptible to air resistance.

[0022] In this embodiment of the impeller 20, the disc portion 21 has a flat bottom plate and is equipped with a plate-shaped inner bottom surface that instantaneously receives the granular material supplied from the discharge device 16. In addition, as shown in Figure 4, the impeller 20 in this embodiment is provided with three fin portions 25, which are positioned at three equal divisions of the circumference on the upper side of the disc portion 21. Each fin portion 25 in this embodiment is made by bending a strip-shaped plate material into a hook shape near the peripheral edge 23 of the disc portion 21, so that it is provided in a concave shape to receive air pressure in the direction of rotation. However, the fin portions 25 are not limited to this, and as long as they are in a shape that receives air pressure in a substantially concave shape, it is sufficient for the centrifugal force to be sufficiently transmitted to the granular material, for example, they may be formed in a smooth arc shape.

[0023] In this embodiment, the impeller 20 has a gap 24 between each fin section 25 and the rotating shaft 22. This gap 24 prevents granular materials such as rice seeds that have fallen from the hopper tank 24 through the discharge port 17 from becoming unevenly distributed on the disc section 21 (inner bottom surface). In other words, the gap 24 allows the granular materials to move somewhat freely, distributing evenly on the disc section 21 and further suppressing variations in lateral dispersal.

[0024] Furthermore, in the granular material dispensing device according to the present invention, the impeller 20 may be configured to include an auxiliary fin portion 26 in addition to the fin portion 25 on the disc portion 21, and / or a drop hole 27 from which the granular material can be dropped. This allows for more uniform dispensing of the granular material.

[0025] In this embodiment, as shown in Figure 4 and other figures, the disc portion 21 of the impeller 20 is provided with multiple fin portions 25, as well as auxiliary fin portions 26 located at intermediate points (equally divided circumferential angles) between the fin portions 25. The auxiliary fin portions 26 in this embodiment are shorter than the fin portions 25 and are positioned closer to the periphery 23 of the impeller 20. These auxiliary fin portions 26 have the effect of further suppressing variations in the lateral dispersion of granular material.

[0026] Furthermore, in this embodiment, as shown in Figure 4, the disc portion 21 of the impeller 20 is provided with a drop hole 27 that allows granular material such as rice seeds to pass through appropriately, so that the granular material can fall in a balanced manner directly below the drone. The drop hole 27 in this embodiment is located slightly closer to the rotation axis 22 in the middle of the impeller 20 between the rotation axis 22 and the periphery 23, and is positioned close to the concave surface of each fin portion 15 between adjacent fin portions 25. By arranging the drop hole 27 in this way, it is possible to drop a more appropriate amount of granular material directly below the drone, taking into account the relationship (balance) with the effects of centrifugal force on the granular material and its tendency to accumulate.

[0027] The granular material dispersing device according to the present invention offers a particularly advantageous effect compared to conventional devices: by dispersing the granular material more linearly in the left-right direction, it can be distributed more efficiently and uniformly over a wider area. In other words, according to the granular material dispersing device of the present invention, when mounted on a drone, for example, as shown in Figure 8(a), the granular material (seed rice) can be dispersed in a more linear, band-like (or rectangular) shape, spreading more linearly to the left and right, with a more uniform concentration. Compared to the conventional fan-shaped dispersal (Figure 8(b)), it can be dispersed more effectively to the corners of the paddy field and maintain uniformity over longer distances in the left and right directions, thereby increasing the efficiency of the dispersal work. (Note that the dotted arrows in Figure 8 indicate the flight path.) Furthermore, because the granular material can be dispersed more uniformly, it can be dispersed efficiently, eliminating waste of the granular material. Therefore, for example, as shown in Figure 8(a), when the present invention is used for direct seeding of rice seeds, the work efficiency is increased, production efficiency is improved, and the cost of rice production can be reduced.

[0028] Furthermore, in this embodiment, as shown in Figure 6, the discharge port 17 from which the granular material of the discharge device 16 is dropped and discharged is the top cover portion 31 of the spray guide cover 30, and is open so that the granular material is dropped and supplied between the periphery 23 of the disc portion 21 of the impeller 20, which is close to one of the pair of side wall guide portions (in this embodiment, one of the side wall guide portions 32a), and the rotation axis 22 of the disc portion 21.

[0029] In the granular material spreading apparatus using the discharge device 16 of this embodiment, the discharge device 16, which has an outlet 17, does not have a shape that is perfectly symmetrical with respect to the spreading guide cover 30, but it is possible to spread the granular material linearly in both left and right directions while maintaining uniformity of concentration. In other words, the granular material spreading apparatus equipped with this discharge device 16 can spread the granular material evenly over a wider area, thereby improving its spreading efficiency, and its shape is designed to be easy to manufacture.

[0030] Thus, even if the discharge device 16 has an outlet 17 positioned in a location that does not have perfect symmetry, the reason why it can be dispersed evenly in both left and right directions is thought to be that the rotational movement of the impeller 20 creates negative pressure in the center of the impeller 20 according to the principle of a centrifugal blower (such as a sirocco fan), and the granular material immediately after being discharged from the outlet 17 of the discharge device 16 instantaneously behaves as if being sucked, at least partially, towards the center of the disc portion 21 of the impeller 20, and then dispersed as if being thrown outward by centrifugal force, and also because the shape of the fin portion 25 in this embodiment allows the granular material to be retained on the disc portion 21 more appropriately and a stronger centrifugal force to be applied compared to radially arranged and linearly formed fins.

[0031] It is possible to improve symmetry by dividing the discharge port 17 into two or more sections at point-symmetrical positions, but this would complicate the shape and increase manufacturing costs. Furthermore, if multiple discharge ports 17 are provided at symmetrical positions, a problem arises where the granular material will not be evenly distributed on the left and right sides unless it is discharged evenly from each of the multiple discharge ports, meaning that the granular material cannot always be distributed uniformly.

[0032] Furthermore, in this embodiment, the impeller is suspended from a portion of the top cover portion 31 located on the side of the side wall guide portion (in this embodiment, the other side wall guide portion 32b) that is not close to the position of the discharge port 17, and a scattering suppression wall (one scattering suppression wall 33a) is provided to suppress the scattering of granular material in a manner corresponding to the upstream portion of the airflow generated by the rotation of the impeller 20, from the portion of the impeller 20's periphery 23 that is close to the other side wall guide portion 32b.

[0033] Furthermore, in this embodiment, the impeller 20 has a configuration in which a scattering suppression wall (the other scattering suppression wall 33b) is provided that suppresses the scattering of granular material, corresponding to the upstream portion of the airflow generated by the rotation of the impeller 20, from the portion of the impeller 20's periphery 23 that is close to the one side wall guide 32. In other words, the one scattering suppression wall 33a and the other scattering suppression wall 33b are arranged at diagonal positions with respect to the rotation axis 22 of the impeller 20.

[0034] As shown in Figure 5, one scattering suppression wall 33a and the other scattering suppression wall 33b in this embodiment have an arc-shaped wall form and are arranged concentrically with the rotation axis 22 of the impeller 20, with a required gap between them and the periphery 23 of the disc portion 21 of the impeller 20. By adjusting this gap, the amount of granular material dispersed directly below and around the discharge device 16 can be adjusted so that some of the material leaks out. Furthermore, the shapes of the one scattering suppression wall 33a and the other scattering suppression wall 33b are not limited to this; for example, as long as the inner surface of the disc portion 21 of the impeller 20 relative to the periphery 23 has a curved, arc-shaped cross-section, the shape of the outer surface is not particularly limited. Also, the shapes and arrangement of the one scattering suppression wall 33a and the other scattering suppression wall 33b can be selectively adjusted as appropriate, and are not limited to being arranged in point-symmetrical positions and of the same size as in this embodiment. For example, depending on the differences in various conditions, the scattering suppression effect of one scattering suppression wall 33a may be increased to enhance the scattering suppression effect compared to the other scattering suppression wall 33b, thereby adjusting the balance of scattering of granular material in both left-right directions.

[0035] According to this, it is possible to moderately prevent the granular material from being scattered (falling) in excessive amounts in a highly concentrated state in the area closer to the area directly below where the drone 10 is flying (directly below the central part in the left-right direction of the spraying guide cover 30), and to distribute the granular material more uniformly. Although this effect is thought to vary depending on various conditions, in this embodiment, the effect is more pronounced with one of the scattering suppression walls 33a. This is because the scattering suppression wall 33a corresponds to the area on the disc portion 21 of the impeller 20 where the granular material discharged from the discharge port 17 of the discharge device 16 is in a more concentrated state.

[0036] In this embodiment, one fixed guide vane (in this embodiment, one half-position fixed guide vane 35a and one quarter-position fixed guide vane 35b) is provided, suspended from the top cover portion 31 at a position immediately downstream of the position of the discharge port 17 in the airflow generated by the rotation of the impeller 20, and extends to the left and right with respect to the direction of movement of the mobile device (in this embodiment, the drone 10) to guide the granular material to be scattered in one direction to the left or right. In addition, the other fixed guide vane (in this embodiment, the other half-position fixed guide vane 37a and the other quarter-position fixed guide vane 37b) is provided, suspended from the top cover portion 31 at a position diagonally opposite to the one fixed guide vane with respect to the rotation axis 22, and extends to the left and right with respect to the direction of movement of the mobile device (in this embodiment, the drone 10) to guide the granular material to be scattered in the other direction to the left or right.

[0037] With one fixed guide vane and the other fixed guide vane, the side wall guide section 32a and the other side wall guide section 32b and the top cover section 31 can appropriately configure a left-right passage through which the granular material can be guided and dispersed so that it is more appropriately restricted (controlled) in the left-right direction. As a result, the granular material is dispersed more restricted in both left and right directions in the tangential direction of the disc section 21 of the impeller 20, allowing it to be dispersed in a more linear band shape and more uniformly over longer distances on both sides, thereby increasing dispersal efficiency and improving productivity.

[0038] In this embodiment, the fixed guide vanes are configured with two vanes each positioned symmetrically. However, the present invention is not limited to this configuration. For example, instead of symmetrically arranging them, the positional relationship between the fixed guide vanes may be adjusted to be different on the left and right sides. Alternatively, there may be only one vane each, or three or more vanes. Furthermore, the positional relationship between the fixed guide vanes can be adjusted according to various spraying conditions. For example, by bringing the position of one quarter-position fixed guide vane 35b of the fixed guide vane closer to the side wall guide (one side wall guide 32a in this embodiment), it is possible to suppress the scattering of granular material immediately after it is discharged from the discharge port 17 of the discharge device 16 and supplied onto the disc portion 21 of the impeller 20 in one direction (left to right), thereby adjusting the balance of scattering in both directions (left and right).

[0039] Furthermore, the shape and arrangement of the half-position fixed guide vane and quarter-position fixed guide vane, which are components of one fixed guide vane and the other fixed guide vane in this embodiment, can be selectively set as appropriate to adjust the balance of granular dispersion in both directions to the right. In this embodiment, the quarter-position fixed guide vane is arranged in a shape that tapers in a direction that expands its passage toward the dispersion direction (outward) in relation to the side wall guide section, while the half-position fixed guide vane is arranged parallel to the side wall guide section, so that in relation to the quarter-position fixed guide vane, its passage narrows toward the dispersion direction (outward). Therefore, although the air-blowing effect of the fin portion 25 of the impeller 20 is considered to be smaller than the effect of the centrifugal force of the impeller 20, the passage between the quarter-position fixed guide vane and the side wall guide becomes negative pressure, drawing in granular material and making it easier to spray more linearly in the left-right direction along the side wall guide. The passage between the quarter-position fixed guide vane and the half-position fixed guide vane becomes positive pressure, generating a high-velocity airflow in the left-right direction. This airflow acts as a wall, guiding the granular material to spray more linearly, thus contributing to the improvement of spraying efficiency as described above.

[0040] Furthermore, in this embodiment, flap devices 40 are provided at each of the left and right ends of the spray guide cover 30 to adjust the spray angle in the vertical direction. That is, in this embodiment, the flap plate 41 is configured to be rotatable by the flap plate drive device 42 so as to be adjustable to a desired angular position in the vertical direction.

[0041] According to this, for example, the size of the lateral spraying range and the spraying concentration can be controlled and adjusted according to various spraying conditions, such as the type of granular material to be sprayed, the flight conditions of the drone including its flight performance and flight path (flight altitude, etc.), and the natural environment including weather conditions. This makes it possible to perform optimal spraying according to the spraying conditions, improving work efficiency and increasing productivity.

[0042] Although various preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. [Explanation of Symbols]

[0043] 10 Drones 11 Main unit 12 propellers 13 Legs 14 Hopper Tank 15. Discharge / Spray Drive Unit 16 Ejection device 16a Stirring motor 16b Stirring coil 17 Outlet 20 Impellers 21 Disc section 22 Rotation axis 23 Periphery 24 gaps 25 Fin section 26 Auxiliary fin section 27 Dropping holes 30 Spraying guide cover 31 Top cover section 32a Guide section on one side wall 32b Guide section of the other side wall 33a One of the scattering suppression walls 33b Other scattering suppression wall 35a One half-position fixed guide vane 35b One quarter position fixed guide vane 37a Other half-position fixed guide vane 37b Other quarter position fixing guide vane 40 Flap device 41 Flap plate 42 Flap plate drive device

Claims

1. A granular material spreading device comprising: a hopper tank provided for storing granular material and mounted on a mobile device; a discharge device connected to the hopper tank for sequentially dropping and discharging the granular material; an impeller that is rotationally driven to receive and spread the granular material discharged from the discharge device; and a spreading guide cover provided to cover the impeller from above and to guide the direction of spreading the granular material, wherein The spray guide cover is provided with one side wall guide portion and the other side wall guide portion, which are positioned on the front or rear side in the direction of movement of the moving device and extend to the left and right in close proximity to the outer edge of the impeller, and which guide the spraying direction of the granular material in the left and right directions. A granular material spreading device characterized in that the impeller comprises a disc portion that rotates to receive the supply of the granular material, and a plurality of fin portions that are provided in a manner that extends from the side of the rotation axis of the disc portion toward the periphery, wherein the shape of the fin portions is provided in a manner that receives air pressure in a concave shape in the direction of rotation, and the disc portion is provided with a discharge hole through which the granular material can pass so that it falls.

2. The granular material dispensing device according to claim 1, characterized in that the discharge port for dropping and discharging the granular material of the discharge device is located on the top cover portion of the dispensing guide cover and is open between the periphery of the disc portion of the impeller, which is close to either the one side wall guide portion or the other side wall guide portion, and the rotation axis of the disc portion, so as to be supplied with the granular material.

3. The granular material dispensing device according to claim 2, characterized in that a scattering suppression wall is provided that suppresses the scattering of the granular material, in a manner that hangs down from a portion of the top cover portion located on the side of one side wall guide portion or the other side wall guide portion that is not close to the position of the discharge port, and the periphery of the impeller is provided with a scattering suppression wall that suppresses the scattering of the granular material, corresponding to the upstream portion of the airflow generated by the rotation of the impeller, from the portion of the impeller that is close to the one side wall guide portion or the other side wall guide portion.

4. The granular material dispersing device according to claim 3, characterized in that one fixed guide blade is provided in a form that hangs down from the top cover portion at a position immediately downstream of the position of the discharge port in the airflow generated by the rotation of the impeller, and extends left and right with respect to the direction of movement of the moving device to guide the granular material to be dispersed in one direction in the left and right direction, and the other fixed guide blade is provided in a form that hangs down from the top cover portion at a position diagonally opposite to the one fixed guide blade with respect to the axis of rotation, and extends left and right with respect to the direction of movement of the moving device to guide the granular material to be dispersed in the other direction in the left and right direction.

5. The granular material spreading device according to any one of claims 1 to 4, characterized in that flap devices are provided at each of the left and right ends of the spreading guide cover so as to be able to adjust the spreading angle in the vertical direction.

6. The granular material spreading device according to any one of claims 1 to 4, characterized in that the disc portion of the impeller is provided with an auxiliary fin portion that is shorter than the fin portion, in addition to the fin portion.

7. The granular material dispersing device according to any one of claims 1 to 4, characterized in that the mobile device is a drone.

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