JP2012152140A - Powder and granular material spraying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder and granular material spraying device capable of easily preventing clogging with powder and granular material in a diffusion guide case, and capable of easily preventing occurrence of trouble caused by a clogging prevention means.SOLUTION: The powder and granular material spraying device includes a rotator 50 which includes a rotary plate 51 for receiving powder and granular material and blades 52 projecting upward from the rotary plate 51 for sputtering powder and granular material. The diffusion guide case 58 includes: a ceiling wall part 58A; a vertical wall part 58B located along the outer peripheral edge of the rotator 50 on the opposite side from where a diffusion port 58C to the rotator 50 is located; and a guide lateral wall part 60 located between the diffusion port 58C and the vertical wall part 58B for guiding diffusion of the powder and granular material. The diffusion guide case 58 is opened downward. The lower ends 58Bt and 60t of the vertical wall part 58B and the guide lateral wall part 60 are lower than the lower end 50t of the rotator 50.

Description

  In the present invention, the granular material is supplied to the inside of the diffusion guide case, and the supplied granular material is splashed by a rotating body that is driven to rotate around a vertical axis inside the diffusion guide case, so that the diffusion is performed. The present invention relates to a granular material spraying device configured to be guided by a guide case and scattered from a spraying port of the diffusion guide case.

  Conventionally, for example, there has been one described in Patent Document 1 as the above-described powder particle distribution device. The one described in Patent Document 1 includes a casing as a diffusion guide case and a centrifugal blower as a rotating body.

Shokai 57-9230

In the case of the granular material spraying device obtained by adopting the above-described conventional technique, the bottom wall portion of the diffusion guide case exists below the rotating body, and there are the following problems.
Although the granular material is supplied to the operating range of the rotating body, the supplied granular material may deviate from the operating range of the rotating body due to rebound or the like. As a result, the granular material deviating from the operating range of the rotating body remains in the diffusion guide case, and clogging of the granular material is likely to occur. In addition, if clogging of powder particles occurs, poor spraying is likely to occur due to poor movement of the rotating body.

  An object of the present invention is to provide a granular material spraying device that easily avoids clogging of powder particles in a diffusion guide case and that also avoids problems caused by clogging avoidance means.

In the first aspect of the invention, the granular material is supplied into the diffusion guide case, and the supplied granular material is splashed off by a rotating body that is driven to rotate around the vertical axis inside the diffusion guide case. In the granular material spraying device configured to be guided by the diffusion guide case and scattered from the spraying port of the diffusion guide case,
The rotating body includes a rotating plate that receives the granular material while being driven to rotate around the longitudinal axis, and a blade body that protrudes upward and integrally from the rotating plate so as to jump off the granular material. And
The diffusion guide case is positioned along the outer peripheral edge of the rotating body on the opposite side of the rotating body from the ceiling wall portion covering the rotating body and the side where the spray port is positioned. A vertical wall portion that restricts scattering of the body, and a guide horizontal wall portion that is positioned on both sides of the rotating body between the spraying port and the vertical wall portion and that guides and diffuses the granular material. ,
The diffusion guide case is configured to open downward, and the arrangement height of the lower ends of the vertical wall portion and the guide horizontal wall portion is set to be lower than the lower end of the rotating body.

According to the configuration of the first aspect of the present invention, the supplied granular material is received by the rotating plate constituting the rotating body and is subjected to the splashing by the blade body, and the granular material that is skipped in the predetermined direction is the diffusion guide. If there is a granular material that is guided by the guide horizontal wall portion that constitutes the case, scatters from the spray port, and tries to fly away from the predetermined direction from the rotating body, this granular material is the vertical wall portion. Is controlled so that it does not scatter outside the diffusion guide case, jumps back to the rotating body in a predetermined direction and scatters from the spray port, so that the diffusion guide case is configured to open downward, The powder particles can be dispersed as prescribed. And when the granular material which protrudes from the rotating body and is not subject to splashing by the rotating body is generated, the protruding granular material is dropped from the rotating body and discharged out of the diffusion guide case from the downward opening of the diffusion guide case. be able to.
Since the arrangement height of the lower end of the vertical wall part and the guide horizontal wall part is set to be lower than the lower end of the rotating body, even if water or mud jumps up from the rice field etc., the vertical wall part and the guide A guard function can be exerted on the vertical wall portion and the guide horizontal wall portion so that it does not easily enter the inside of the diffusion guide case by hitting the horizontal wall portion. Also, when it rains or is washed, water drops that fall along the outer surface of the vertical wall or guide horizontal wall reach the lower end of the vertical wall or guide horizontal wall and enter the inner surface of the vertical wall or guide horizontal wall. Even if it wraps around, it can prevent wrapping around the rotating body.

  Therefore, even if a granular material outside the range of action of the rotating body is generated, it is easy to avoid clogging of the granular material by naturally discharging by the downward opening of the diffusion guide case, and muddy water from the downward opening of the diffusion guide case. And water droplets can be easily prevented by the guard function of the vertical wall and guide horizontal wall, and it is easy to avoid clogging due to muddy water and water droplets entering, and it is difficult to cause poor spraying due to clogging A body spraying device can be obtained.

  According to the second aspect of the invention, in the configuration of the first aspect of the invention, the guide lateral wall portion is supported so that the angle can be changed so that the diffusion guide direction changes.

  According to the configuration of the second aspect of the invention, by changing the angle of the guide lateral wall portion, the diffusion guide direction by the guide lateral wall portion can be changed to change the spraying direction of the granular material.

  Therefore, even when spraying particles with no change in properties, changing the spreading direction by changing the diffusion guide direction by the guide horizontal wall or when spraying particles with changes in properties Even if it exists, the spreading | diffusion direction can be adjusted to a desired direction, such as changing the spreading | diffusion guide direction by a guide horizontal wall part, and not changing a spreading | diffusion direction substantially.

  According to the third aspect of the present invention, in the configuration of the second aspect of the invention, the upper end of the guiding horizontal wall portion overlaps the vertical wall portion in the radial direction of the rotating body outside the vertical wall portion. It is arranged in the state to do.

  According to the configuration of the third aspect of the invention, the vertical wall portion is disposed so as to be as close as possible to the outer peripheral edge of the rotating body from one end to the other end thereof in the rotating body rotation direction. While forming both ends in the direction of rotation of the rotating body into a simple shape that enters between the rotating body and the lateral guide wall, the upper end of the guide lateral wall in the direction of the granular material flow is as much as possible on the outer surface of the vertical wall. Can be approached.

  Therefore, the gap between the vertical wall part and the rotating body can be made as narrow as possible to prevent the occurrence of powder particle leakage between the vertical wall part and the rotating body, and the gap between the guide horizontal wall part and the vertical wall part can be made as narrow as possible. Leakage of the granular material from between the horizontal wall portion and the vertical wall portion can be made difficult to occur, and it is easy to avoid troubles such as leakage of the granular material and adversely affecting the crop. In addition, the vertical wall portion can be obtained at a low cost with a simple shape.

  In the fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the length of the guide lateral wall portion in the flow direction of the granular material is set to 1.5 times or more the diameter of the rotating body. It is.

  According to the configuration of the fourth aspect of the present invention, the length of the diffusion guide area of the guide lateral wall portion that performs diffusion guide action on the powder particles is increased in the flow direction of the powder particles, and the powder particles jumped off by the rotating body. The guide horizontal wall portion can be made to act as reliably as possible so that it is difficult for the material to be dispersed without receiving the diffusion guide action by the guide horizontal wall portion.

  Therefore, it is possible to cause the granular material splashed off by the rotating body to receive the diffusion guide by the guide lateral wall portion as much as possible, and to accurately distribute the granular material in a desired distribution direction.

It is a whole side view of a riding type rice transplanter. It is a whole top view of a riding type rice transplanter. It is a rear view of a granular material spraying apparatus. It is a vertical side view of a granular material spraying apparatus. It is a bottom view of a granular material spraying apparatus. It is a cross-sectional top view of a dispersion part. (A) The bottom view which shows the spreading | diffusion part in the state in which the attachment angle of the side guide wall part was changed, (b) It is a rear view which shows a spreading | diffusion guide case. It is a vertical side view of a feeding mechanism. It is a cross-sectional plan view of a feeding mechanism. It is a cross-sectional top view of the delivery part in 2nd Embodiment. It is a cross-sectional plan view of the feeding part in 3rd Embodiment.

[First Embodiment]
Hereinafter, based on drawings, the case where the riding type rice transplanter is equipped with the powder particle distribution device according to the present invention will be described.
As shown in FIGS. 1 and 2, the riding type rice transplanter includes an engine 4 and a transmission case on the front side of a traveling machine body 3 having a pair of left and right front wheels 1 and a pair of left and right rear wheels 2 that can be steered. 5, a steering unit 7 equipped with a steering handle 6, a driver's seat 8, and the like is provided behind the engine 4 of the traveling machine body 3, and reserve seedling platforms 9 are disposed on the left and right sides of the traveling machine body 3. Has been. A seedling planting device 12 is connected to the rear of the traveling machine body 3 so as to be movable up and down through a link mechanism 11 by operating a lift cylinder 10, and a chemical such as a herbicide is sprayed behind the seedling planting device 12. A granular material spraying device 13 is provided. The seedling planting device 12 is configured in a four-row planting type. The mission case 5 is provided with a hydrostatic continuously variable transmission (not shown) that is operated to change speed by operating the speed change lever 16.

As shown in FIGS. 1 and 2, the seedling planting device 12 has two transmission cases 15 facing rearward on a support frame (not shown) that is connected to one feed case 14 and extends in the left-right direction of the machine body. Cantilevered. A planting arm 18 is supported by the crank mechanism 17 so as to be swingable up and down on both the left and right sides of the rear portion of the transmission case 15, and a planting claw 22 is provided on the planting arm 18. A grounding float 19 is supported on.
In addition, the seedling planting device 12 is provided with a seedling platform 20 so that it can be driven back and forth by a fixed stroke to the left and right. Each time the seedling platform 20 reaches the stroke end, the seedling planted is placed. A belt-type vertical feeding device 21 that feeds a fixed amount downward is provided on the seedling table 20.

  The power transmitted to the feed case 14 is transmitted to the transmission case 15 and the planting arm 18 is driven. On the other hand, the seedling table 20 is driven to reciprocate laterally by the power transmitted to the feed case 14. The planting arm 18 that swings up and down from the lower part of the seedling platform 20 takes out the seedlings one by one with the planting claws 22 provided at the tip of the planting plant, and plants the seedling platform 20 back and forth. When the stroke end of the lateral feed is reached, the vertical feed device 21 is driven by the power transmitted to the feed case 14 so that the seedling placed on the seedling raising table 20 is sent downward.

Next, the granular material spraying device 13 will be described.
As shown in FIG. 1 to FIG. 3, the powder particle disperser 13 is supported by a support column 23 fixedly erected from two transmission cases 15 in a state of being positioned above a set distance from the rice field in a seedling planting state. It has a configuration. As shown in FIGS. 4 and 5, the powder particle disperser 13 is a hopper-shaped storage unit 24 that stores the drug, and a feeding unit that feeds the drug from the storage unit 24 located below the storage unit 24. It comprises a mechanism 25 and a spraying part 27 for spraying a medicine fallen and supplied from the feeding mechanism 25 through the supply path 26, and the seedling planting device 12 uses a medicine such as a herbicide stored in the storage part 24. Apply to the places where seedlings were planted.

  The support column 23 is erected upward from a portal-shaped support frame 23a as viewed in the front-rear direction and attached to a pair of transmission cases 15, 15.

  The feeding mechanism 25 is configured to be housed in a casing 29 that is detachably connected to the support column 23 by a connecting portion 29 </ b> A. The casing 29 is made of a synthetic resin material, and drops and supplies the medicine to the spraying portion 27. The cylinder part 30 which comprises the supply path | route 26 is integrally formed. As shown in FIG. 5, the casing 29 has a left and right split structure in which the divided casing portions 29a and 29b on the left and right sides are connected to each other at the mating surfaces.

  As shown in FIGS. 4, 8, and 9, the feeding mechanism 25 closes the metal opening forming plate 32 in which the powder particle passage opening 31 is formed and the powder particle passage opening 31. A metal shutter member 33 is slidably movable between a closed state and an open state where the medicine passage opening 31 is opened, and a solenoid 34 serving as an actuator for switching the shutter member 33 between the closed state and the open state. It is configured.

The opening forming plate 32 and the shutter member 33 are provided so as to overlap each other. When the shutter member 33 closes the opening 31 for passing the granular material formed in the opening forming plate 32, the opening forming plate 32 and the shutter member 33 are closed. When it is stopped and the shutter member 33 slides to a position where the opening 31 for passing the granular material is opened, the opening 31 for passing the granular material is opened to be in an open state. The medicine is dropped and supplied to the lower supply path 26 through the opening 31.
In this configuration, only the shutter member 33 exists below the opening 31 for passing the granular material, and no other member exists below the shutter member 33, so that the medicine is not easily clogged. Yes.

  The opening forming plate 32 is formed with a downward bent piece 32b bent downward at the opening side end portion of the horizontal surface portion 32a where the opening 31 for passing the granular material is formed, and the solenoid 34 side end portion opposite thereto. An upward bent piece 32c that is bent upward is formed. In addition, the shutter member 33 is surrounded from above and below in order to prevent the shutter member 33 from separating downward at both sides in the width direction at the intermediate portion between the opening side end portion of the horizontal plane portion 32a and the solenoid 34 side end portion. Thus, a holding portion 32d that is bent in a substantially U-shape is formed.

  In the opening forming plate 32, the downward bent piece 32 b is engaged with a locking recess 35 formed on the inner side of the cylindrical portion 30 of the casing 29, and the shutter member 33 slides in a direction close to the solenoid 34. The continuous movement is restricted, and the upward bent piece 32c is engaged with the outer edge 36 of the cylindrical portion 30 of the casing 29 so that the shutter member 33 slides away from the solenoid 34. Is configured to be restricted from moving in a row.

  The shutter member 33 is formed in a band plate shape, and is configured to be pivotally connected to the operation rod 37 of the solenoid 34 by a connection pin 38, and is provided in a state of being in contact with the lower side of the opening forming plate 32. The holding portion 32d prevents the opening forming plate 32 from being separated vertically. Further, as shown in FIG. 8, the medicine fitted between the opening forming plate 32 and the shutter member 33 is dropped downward at a position closer to the solenoid 34 side than the opening shielding position 33 </ b> A of the shutter member 33. A scraping hole 39 penetrating in the vertical direction is formed.

As shown in FIG. 4, a solenoid housing chamber 40 for housing the solenoid 34 is formed at the front portion of the cylindrical portion 30 in the casing 29, and the electric motor constituting the spraying portion 27 is formed at the opposite side portion. A motor storage chamber 42 for storing 41 is formed.
A slit hole 43 through which the shutter member 33 and the opening forming plate 32 are inserted is formed in the side wall of the cylindrical portion 30 on the solenoid housing chamber 40 side. A wide guide portion 44 for holding the opening forming plate 32 and the shutter member 33 in a horizontal posture is formed on the upper side of the slit hole 43, and on the upper surface of the wide guide portion 44, the granular material passes. An inclined surface 45 that is inclined downward toward the opening 31 is formed over the entire width. Further, on both sides in the width direction on the upper side of the slit hole 43, both side guide portions 46 for preventing the opening forming plate 32 from being lifted are formed.

  A lower guide portion 47 that receives and supports the shutter member 33 is formed on both sides in the width direction on the lower side of the slit hole 43, and below the scraping hole 39 when the shutter member 33 is switched to the open state. A wide discharge space 48 is formed so that the drug discharged from can be guided to the supply path 26 (see FIG. 8).

  The shutter member 33 is moved and urged to the closed position (position where the powder particle passage opening 31 is closed) by the coil spring 49 housed in the solenoid 34 acting on the connecting pin 38 via the washer 38a. When the coil spring 49 is energized, it can be moved to the open position (position where the powder particle passage opening 31 is opened) by pulling it against the urging force of the coil spring 49.

  Accordingly, the feeding mechanism 25 switches the supply passage 26 between the open state and the closed state by switching the opening 31 for passing the granular material of the opening forming plate 32 between the open state and the closed state by the sliding operation of the shutter member 33 by the solenoid 34. By switching and switching the supply path 26 to the open state, the medicine stored in the storage section 24 is fed out to the supply path 26 and supplied from the supply path 26 to the spraying section 27, and the opening 31 for passing the granular material is passed through. The amount of medicine to be supplied to the spraying unit 27 per unit time is set by setting the time for maintaining the open state.

  As shown in FIGS. 4, 5, and 6, the spreading unit 27 includes a diffusion guide case 58 having a spreading port 58 </ b> C that opens rearward at a position where the rear end of the casing 29 is located, and the diffusion guide case 58. The electric motor 41 is located above the front end side of the guide case 58, and the rotating body 50 is provided inside the diffusion guide case 58 on the front end side.

  The rotating body 50 includes a rotating plate 51 and a blade body 52 that protrudes upward from a plurality of locations in the circumferential direction of the rotating plate of a receiving surface 51 </ b> A that is the upper surface of the rotating plate 51. The rotating support shaft 53 integrally formed with the rotating plate 51 is integrated with the output shaft 41a of the electric motor 41 entering the inside of the diffusion guide case 58 through a through hole provided in the ceiling wall portion 58A of the diffusion guide case 58. The rotary plate 51 of the rotating body 50 is rotatably connected, and is rotationally driven in the rotation direction F (see FIG. 6) by the electric motor 41 around the vertical axis Y that is the axis of the output shaft 41a. The body 52 rotates integrally with the rotating plate 51.

  An outlet 26 a of the supply path 26 is opened in the ceiling wall portion 58 </ b> A of the diffusion guide case 58, and the rotating body 50 is fed to the supply path 26 by the feeding mechanism 25 and supplied to the inside of the feeding case 58 from the supply path 26. The medicine to be received is received by the bladeless region Q on the receiving surface 51A of the rotating plate 51, and the received medicine is moved to the region where the blade body 52 of the receiving surface 51A is present by the rotation of the rotating plate 51. To jump into the diffusion guide case 58.

  The rotating plate 51 is formed in a shape in which the central portion protrudes downward, and the receiving surface 51A is an indented inclined surface positioned downward as it reaches the longitudinal axis Y, and the rotating body 51 is The function of leveling the supplied medicine in the circumferential direction is exhibited.

  The diffusion guide case 58 is formed so as to cover the upper side of the rotating body 50, the plate-shaped synthetic resin ceiling wall portion 58 </ b> A integrally formed with the casing 29, and the spray port 58 </ b> C is positioned with respect to the rotating body 50. A vertical wall portion 58B integrally formed with the casing 29 and located on the opposite side to the side to be closed, and a pair of left and right guide horizontal wall portions 60, 60 positioned separately on both lateral sides of the rotating body 50, A downward opening 58 </ b> D is provided that opens downward over the entire lower region or almost the entire region of the rotating body 50. The ceiling wall portion 58A and the vertical wall portion 58B are integrally formed. In addition, the ceiling wall part 58A and the vertical wall part 58B may employ a configuration in which the casing 29 is configured as a separate member and attached to the casing 29. The vertical height of the vertical wall portion 58B and the guide horizontal wall portion 60 is set so that the lower end 58Bt of the vertical wall portion 58B and the lower end 60t of the guide horizontal wall portion 60 are located at a lower arrangement height than the lower end 50t of the rotating body 50. is there. The distance from the inner surface of the ceiling wall 58A to the lower end 50t of the rotating body 50 and the distance from the lower end 50t of the rotating body 50 to the vertical wall 58B and the lower ends 58Bt and 60t of the guide horizontal wall 60 are set to be the same or substantially the same. Or, if the distance from the lower end 50t of the rotating body 50 to the vertical wall portion 58B and the lower ends 58Bt, 60t of the guide horizontal wall portion 60 is set larger than the distance from the inner surface of the ceiling wall portion 58A to the lower end 50t of the rotating body 50, The water drops descending along the outer surface side of the vertical wall portion 58B and the guide horizontal wall portion 60 reach the lower end 58Bt, 60t of the vertical wall portion 58B and the guide horizontal wall portion 60 and turn to the inner surface side of the vertical wall portion 58B and the guide horizontal wall portion 60. The mud soil that does not reach the position where the rotating body 50 is located and jumps up from the rear wheel 2 or the seedling planting device 12 hits the vertical wall 58B or the guide horizontal wall 60, and the vertical wall 58B and the guide horizontal wall By 0 of guard function hard to reach to the rotating body 50.

  The vertical wall portion 58B is made of a synthetic resin material integrally formed with the ceiling wall portion 58A so as to protrude downward from the front end portion of the ceiling wall portion 58A. The vertical wall portion 58B includes two divided vertical wall portions formed integrally with the two divided casing portions 29a and 29b. The inner peripheral surface 58Bs of the vertical wall portion 58B is formed as an arc surface along the outer peripheral edge of the rotator 50 over almost half of the circumference of the rotator 50. The medicine that has been splashed in the opposite direction (forward direction) is received by the inner peripheral surface 58Bs to restrict the scattering of the medicine, and the medicine is directed toward the center of the rotating body 50 by the arc shape of the inner peripheral surface 58Bs. Bounce back. The gap between the vertical wall portion 58B and the rotating body 50 is set to be a narrow gap so that drug leakage is less likely to occur.

  Each of the pair of left and right guide lateral wall portions 60, 60 bounces back the drug splashed rearward by the rotating body 50 in the diffusion guide region 60 </ b> A from the vicinity of the axis of the support shaft 61 to the rear end of the inner surface. The medicine from the rotator 50 is guided to diffuse and scatter from the spray port 58C in the left-right direction.

  Therefore, the sprinkling unit 27 rotates the rotating body 50 around the vertical axis Y by the electric motor 41, is fed from the storage unit 24 by the feeding mechanism 25, and is supplied into the diffusion guide case 58 from the supply path 26. The medicine is received by the rotating plate 51 of the rotating body 50, and the medicine received by the rotating plate 51 is spun off toward the rear side of the rotating body 50 by the blade body 52 that rotates integrally with the rotating plate 51, and the skipped medicine is guided. By spreading and scattering from the spraying port 58C in the left-right direction by diffusion guide by rebound of the diffusion guide region 60A of the horizontal wall 60, the seedling planting device 12 is spread over the entire width of this seedling planting site. Disperse and spread the drug.

  The spraying unit 27 discharges the medicine spilled from the rotating body 50 from the downward opening 58D of the diffusion guide case 58 and drops it onto the place where the seedling planting device 12 has planted the seedling, and the rear wheel 2 and the seedling. The muddy water splashed by the planting device 12 is sprayed with the medicine while preventing the muddy water from entering the portion of the diffusion guide case 58 where the rotating body 50 is located by the guard function of the vertical wall portion 58B and the guide horizontal wall portion 60.

  As shown in FIGS. 5 and 6, the pair of left and right guide lateral wall portions 60, 60 are supported by the ceiling wall portion 58 </ b> A via a support shaft 61 attached to the upper end portion 60 a in the drug flow direction. . The support shaft 61 is rotatable about the axis P parallel to the longitudinal axis Y that is the rotation axis of the rotating body 50 with respect to the ceiling wall 58A with respect to the ceiling wall 58A. It is fixedly connected.

  As shown in FIG. 7A, each of the guide lateral wall portions 60 is operated to swing around the axis P of the support shaft 61 by releasing the tightening and fixing of the support shaft 61 from the ceiling wall portion 58A. The direction in which the mounting angle with respect to the ceiling wall 58A is changed by being fastened and fixed to the ceiling wall 58A by the support shaft 61 at the raised position, and the medicine from the rotating body 50 is guided so as to diffuse laterally. To change. As shown in FIGS. 7A and 7B, the guide horizontal wall portion 60 includes a seal plate 62 that extends from the upper end portion of the guide horizontal wall portion 60 toward the inside of the diffusion guide case 58. When the mounting angle is changed so that the portion 60 protrudes laterally outward from the ceiling wall portion 58A, the gap between the guide lateral wall portion 60 and the ceiling wall portion 58A is closed by the seal plate 62 so that no chemical leakage occurs.

  Therefore, by changing the mounting angle of the pair of left and right guide horizontal wall portions 60, 60 with respect to the ceiling wall portion 58A to the same direction or different directions at the same angle or different angles, the medicine from the rotating body 50 can be changed to each guide horizontal wall portion 60. The direction in which the splash is guided by the diffusion guide region 60A can be changed, and the size of the seedling planting device is adjusted in the horizontal direction within the range where the drug is sprayed by the spray unit 27, or the drug is sprayed by the spray unit 27. The position in the lateral direction with respect to the seedling planting device 12 can be changed. When the herbicide is sprayed at the same time as seedling planting, if it is sprayed on unplanted seedlings or unplanted areas on the rice field, the rice may die, and it can be adjusted so that it is not sprayed on unplanted seedlings or unplanted areas.

  As shown in FIG. 6, the end surface 60 b of the guide horizontal wall 60 on the upper side in the flow direction of the granular material is formed in an outwardly convex circular arc surface centering on the axis P for changing the mounting angle of the guide horizontal wall 60. The end surface 58Bf of the vertical wall portion 58B facing the end surface 60b of the guide horizontal wall portion 60 is formed as a concave arcuate surface centering on the axis P for changing the mounting angle of the guide horizontal wall portion 60.

  That is, the mounting angle of the guide horizontal wall portion 60 can be changed while maintaining the state in which the end surface 60b of the guide horizontal wall portion 60 and the end surface 58Bf of the vertical wall portion 58B are close to each other, and the space between the vertical wall portion 58B and the guide horizontal wall portion 60 can be changed. The gap is a narrow gap in which drug leakage is less likely to occur regardless of the change in the mounting angle of the guide lateral wall 60.

[Second Embodiment]
FIG. 10 is a cross-sectional plan view showing the spraying portion 27 in the second embodiment. In the spreading unit 27 in the second embodiment, the length L1 in the drug flow direction in the diffusion guide region 60A of the guide horizontal wall 60 is set to a length that is 1.5 times or more the diameter L2 of the rotating body 50. Thus, the direction of the diffusion direction of the medicine by the guide lateral wall portion 60 is accurately performed.

[Third Embodiment]
FIG. 11 is a cross-sectional plan view showing the spraying portion 27 in the third embodiment. In the spreading part 27 in the third embodiment, the upper end 60a in the medicine flow direction of the guide horizontal wall part 60 is arranged outside the vertical wall part 58B so as to overlap the vertical wall part 50B in the radial direction of the rotating body 50. Has been.

  According to this configuration, the vertical wall portion 58B is brought as close as possible to the outer peripheral edge of the rotating body 50 from one end to the other end in the rotating body rotation direction, and drug leakage from the gap between the vertical wall portion 58B and the rotating body 50 is prevented. Even if it is difficult to occur and the vertical wall portion 50B is formed in a simple shape in which both end portions in the rotation direction of the rotating body enter between the rotating body 50 and the guiding horizontal wall portion 60, the medicine of the guiding horizontal wall portion 60 By making the upper end 60a in the flow direction closer to the outer surface side of the vertical wall 58B as much as possible, it is possible to prevent drug leakage from between the guide horizontal wall 60 and the vertical wall 58B.

[Another embodiment]
(1) In the above-described embodiment, the diffusion guide case structure in which the lower end 58Bt of the vertical wall portion 58B and the lower end 60t of the guide horizontal wall portion 60 are located at the same arrangement height has been shown, but the lower end 58Bt of the vertical wall portion 58B is Diffusion guide case structure located at a lower placement height than the lower end 60t of the guide horizontal wall portion 60, or a diffusion guide case structure located at a placement height where the lower end 60t of the guide horizontal wall portion 60 is lower than the lower end 58Bt of the vertical wall portion 58B. May be adopted.

(2) In the above-described embodiment, the length in the drug flow direction of the left and right guide lateral wall portions 60 provided on both lateral sides of the rotating body 50 is set to be substantially the same length. In other words, the length in the medicine flow direction of the guide horizontal wall portion 60 provided on the upper side of the rotating body rotation direction with respect to the vertical wall portion 58B of the left and right guide horizontal wall portions 60 is the same as the drug flow direction of the other guide horizontal wall portion 60. You may employ | adopt the structure set longer than this length. In addition, when the powder and particle distribution device 13 is installed to be laterally biased with respect to the center in the lateral direction of the seedling planting device 12, the right and left sides correspond to the biased direction and the rotational direction of the rotating body 50. You may employ | adopt the structure which makes the length in the chemical | medical agent flow direction of a pair of guide horizontal wall part 60 and 60 differ. Then, regardless of the rotation direction of the rotator 50 and the deviation of the powder particle disperser 13 from the seedling planting device 12, it is possible to achieve more uniform drug distribution amount in the left-right direction.

(3) In the above-described embodiment, an example in which the lateral guide wall 60 is made to swing is shown, but the lateral guide wall 60 may be fixed. When the lateral guide wall 60 is fixed, the lateral guide wall 60 may be configured to be continuous with the vertical wall 58B. In this case, the lateral guide wall 60 may be formed integrally with the casing 29 or may be attached to the casing 29 as a separate member.

(4) In the above-described embodiment, the rotating plate 51 is formed in a circular shape having a constant outer diameter in plan view, but the rotating plate 51 is configured so that the outer diameter of the rotating plate sequentially varies along the circumferential direction. It may be formed as follows. By configuring in this way, the timing of falling downward when the medicine is released outward can be made different in the circumferential direction, and the medicine is made even in the longitudinal direction of the traveling machine body 3 as much as possible. It becomes possible to disperse with.
Further, in order to vary the spraying area, a rotating plate 51 having a different outer shape may be used every time the field conditions are different.

(5) In the above-described embodiment, the plurality of blade bodies 52 are provided in a state along the radial direction of the rotating body 50. However, in order to vary the medicine spraying direction and the spraying area, the plurality of blade bodies 52 are provided. The configuration may be different. For example, it is good also as a structure which inclines the attachment attitude | position of the several blade body 52 in the rotation direction lower side at a different inclination angle with respect to the radial direction of the rotary body 50. Further, the lengths of the plurality of blade bodies 52 in the radial direction of the rotating body may be varied.

(6) In the above-described embodiment, the receiving surface 51A is shown as being formed on a slanted surface having a concave shape located on the lower side of the rotating shaft, but the receiving surface 51A is flat throughout. The region where the blade body 52 is formed on the receiving surface 51A is formed as a slanted concave surface, and the bladeless region Q is formed as a flat surface. The area | region in which the several blade | wing body 52 in the stop surface 51A is formed may be formed in a flat surface, and the blade | wingless area | region Q may be formed in an indented inclined surface.

(7) In the above-described embodiment, the plurality of blade bodies 52 have the same shape and are provided with six pieces. However, the shape and quantity of the blade bodies 52 may be different, for example, the shape of the blade body 52 The shape may be a quadrangle or a triangle, or the number of blade bodies 52 may be 5 or less, or 7 or more.

(8) In the above-described embodiment, the example in which the electric motor 41 is provided in a state of being positioned above the rotating body 50 has been described. However, the arm-shaped support that extends from the vertical wall portion 58B to the lower side of the rotating body 50 is illustrated. It may be implemented by adopting a configuration in which the body is provided and the electric motor 41 is positioned below the rotating body 50 and supported by the support body.

(9) In the above-described embodiment, an example in which a medicine such as a herbicide is sprayed has been shown. However, various powders such as fertilizer may be sprayed.

  The present invention is not limited to the powder and dust distribution device installed in the work machine, but is carried on the back of the worker, and the powder is configured to be portable so as to perform the dusting work while being transported by the worker's walk. It can also be applied to body spraying equipment.

DESCRIPTION OF SYMBOLS 50 Rotating body 50t Lower end of rotating body 51 Rotating plate 52 Blade body 58 Diffusion guide case 58A Ceiling wall portion 58B Vertical wall portion 58Bt Lower end of vertical wall portion 58C Sprinkling port 60 Guide horizontal wall portion 60a Side end 60t Lower end of guide horizontal wall L1 Length of guide horizontal wall in powder flow direction L2 Diameter of rotating body Y Vertical axis

Claims (4)

Powder particles are supplied to the inside of the diffusion guide case, and the supplied powder particles are splashed by a rotating body that is driven to rotate around the vertical axis inside the diffusion guide case, and are guided by the diffusion guide case. It is a granular material spraying device configured to be scattered from the spraying port of the diffusion guide case,
The rotating body includes a rotating plate that receives the granular material while being driven to rotate around the longitudinal axis, and a blade body that protrudes upward and integrally from the rotating plate so as to jump off the granular material. And
The diffusion guide case is positioned along the outer peripheral edge of the rotating body on the opposite side of the rotating body from the ceiling wall portion covering the rotating body and the side where the spray port is positioned. A vertical wall portion that restricts scattering of the body, and a guide horizontal wall portion that is positioned on both sides of the rotating body between the spraying port and the vertical wall portion and that guides and diffuses the granular material. ,
The diffusion guide case is configured so as to open downward, and the disposition height of the lower end of the vertical wall portion and the guide horizontal wall portion is set to be lower than the lower end of the rotating body. apparatus.   2. The granular material spraying device according to claim 1, wherein the guide lateral wall portion is supported so that the angle can be changed so that the diffusion guide direction changes.   The granular material according to claim 2, wherein an upper end portion of the guide horizontal wall portion on the upper side in the powder body flow direction is disposed outside the vertical wall portion so as to overlap the vertical wall portion in the radial direction of the rotating body. Body spraying device. The granular material spraying device according to any one of claims 1 to 3, wherein a length of the guide horizontal wall portion in the granular material flow direction is set to 1.5 times or more of a diameter of the rotating body. .

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