JP2019037189A - Chemical spray vehicle - Google Patents

Abstract

To provide a chemical spray vehicle capable of adjusting an air blowing amount in a blower part with a simple configuration and by a simple operation.SOLUTION: A chemical spray vehicle 1 includes: a blower part 10 having a blower fan 11 rotatably driven around a rotation axis A and a tubular fan case 12 for storing the blower fan 11, in which a suction port 13 is formed at one end of the fan case 12 in the rotation axis A direction, and a discharge port 14 is formed at the other end of the fan case 12 in the rotation axis A direction; a shield cover 20 extending in an arc shape so as to cover the outer peripheral side of the fan case 12 of the blower part 10, which has a predetermined width in the rotation axis A direction; and a movement mechanism 30 configured so as to move the shield cover 20 to an open position P1 in which the shield cover 20 covers the outer peripheral side of the fan case 12 and opens the periphery of a suction space S1 adjacent to the suction port 13, and a shield position P2 in which the shield cover 20 covers the periphery of the suction space S1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a drug distribution vehicle.

  As a medicine spraying vehicle, for example, as described in Patent Document 1, a speed sprayer including a shielding plate disposed at a central portion of an air inlet of a blower is known. In this speed sprayer, the shielding plate includes a plurality of fins formed of a fan-shaped thin plate and a connecting pin that connects these fins. The plurality of fins are provided so as to overlap each other, and each of the fins is rotatable around a central axis. With this configuration, the area of the shielding plate can be expanded and contracted, and the amount of air blown in the blower can be adjusted.

  In addition to such a speed sprayer, as a technique that makes it possible to adjust the air flow rate, for example, a technique is known in which a movable part is provided at the base part of a moving blade and the angle of the moving blade is changed. In addition, a speed increasing device having a speed change mechanism is provided between a power shaft from a tractor or the like and a moving blade shaft of a blower, and the rotating speed of the moving blade is changed by switching the speed increasing ratio. In addition to the above-described speed sprayer that shields the intake port with a fan-shaped fin, there is also known one that shields the intake port with a semicircular plate.

JP 2007-31615 A

  The speed sprayer described in Patent Document 1 employs a mechanism that rotates a plurality of fins that overlap and are connected to each other while shifting them, and the mechanism is complicated. In addition, for the other technologies mentioned above, it is necessary to assemble after removing the parts (fan case, dust screen, etc.) surrounding the rotor blade in order to change the angle of the rotor blade, and to achieve multiple speed ratios In order to do so, it is necessary to use a gearbox with a complicated structure. Moreover, in order to adjust the opening degree of a semicircular disk, the attachment or detachment operation | work using a tool is needed for every adjustment.

  An object of this invention is to provide the chemical | medical agent dispersion | spreading vehicle which enables adjustment of the ventilation volume in an air blower part by simple structure and simple operation.

  A drug distribution vehicle (1) according to an aspect of the present invention includes a blower fan (11) that is driven to rotate around a rotation axis (A), and a cylindrical fan case (12) that houses the blower fan (11). A suction port (13) is formed at one end of the fan case (12) in the direction of the rotation axis (A), and a discharge port (14) is formed at the other end of the fan case (12) in the direction of the rotation axis (A). And a shielding cover that extends in an arc shape so as to cover the outer peripheral side of the fan case (12) of the blower unit (10) and has a predetermined width in the direction of the rotation axis (A) ( 20), an open position (P1) where the shielding cover (20) covers the outer peripheral side of the fan case (12) and opens the outer peripheral portion of the intake space (S1) adjacent to the suction port (13), and the shielding cover ( 20) covers the outer periphery of the intake space (S1) Comprising 蔽 position and (P2), the shielding cover (20) movably arranged moving mechanism (30), the.

  According to this medicine spreading vehicle (1), the blower fan (11) is driven to rotate, and air is sucked from the suction port (13) of the fan case (12) through the intake space (S1). The sucked air is discharged from the discharge port (14), and the sprayed medicine is diffused and dispersed. The shielding cover (20) covering the outer peripheral side of the fan case (12) has an opening position (P1) for opening the outer peripheral portion of the intake space (S1) and an outer peripheral portion of the intake space (S1) by the moving mechanism (30). It can move to the shielding position (P2) to cover. Therefore, the amount of air sucked from the suction port (13), that is, the blown amount in the blower unit (10) can be adjusted. Since it is the structure which moves the shielding cover (20) which has a fixed shape, a structure is simple and the movement operation of the shielding cover (20) is also easy. Moreover, since the shielding cover (20) is provided on the outer peripheral side of the fan case (12), the shielding cover (20) and the moving mechanism (30) can be retrofitted to the existing blower unit (10). That is, the air volume adjustment function can be retrofitted.

  The moving mechanism (30) may be configured to be able to slide the shielding cover (20) along the direction of the rotation axis (A). In this case, since it is only necessary to slide the shielding cover (20) by the moving mechanism (30), the moving operation of the shielding cover (20) is further simplified.

  The moving mechanism (30) is fixed to the fan case (12) and extends along the direction of the rotation axis (A). The moving mechanism (30) is attached to the shielding cover (20) and attached to the rail (31, 32). 32) and at least one roller (33, 34) that fits. In this case, when the rollers (33, 34) roll on the rails (31, 32), the shielding cover (20) can be smoothly slid.

  In the moving mechanism (30), the shielding cover (20) has at least one intermediate position (P3) between the opening position (P1), the shielding position (P2), and the opening position (P1) and the shielding position (P2). And a locking means (40) that can fix the position of the shielding cover (20). In this case, the position of the shielding cover (20) can be fixed by the locking means (40) after adjusting the position of the shielding cover (20) so as to obtain a desired air flow rate. Thereby, the chemical spreader (1) can be stably operated for a certain time while maintaining a desired air flow rate. Since the position of the shielding cover (20) can be fixed at at least three positions of the open position (P1), the intermediate position (P3), and the shielding position (P2), the air flow rate can be adjusted in multiple stages.

  According to the present invention, it is possible to adjust the air flow rate in the blower unit (10) with a simple configuration and simple operation.

It is a perspective view which shows the chemical | medical agent dispersion car which concerns on one Embodiment of this invention. It is a side view which shows the chemical | medical agent dispersion car of FIG. It is a perspective view which shows the air blower part and shielding cover in FIG. It is sectional drawing which shows the locking means provided in a moving mechanism. FIG. 5A is a diagram illustrating a state where the shielding cover is moved to the open position, and FIG. 5B is a diagram illustrating a state where the shielding cover is moved to the shielding position.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drug distribution vehicle of this embodiment is also called a speed sprayer, and is used when, for example, a chemical solution is sprayed on a field such as an orchard. In the following description, “front”, “rear”, “left”, and “right” are directions based on the drug distribution vehicle.

  As shown in FIGS. 1 and 2, the drug distribution vehicle 1 includes left and right wheels 5 attached to a frame 3, and is connected to a towing vehicle such as a tractor via a connecting portion 7 that extends forward. It is a vehicle that can be towed and run. The medicine spreading vehicle 1 includes an input shaft 6 that receives power from a tractor's PTO (Power Take Off) at the front, and transmits power to the pump 4 and the blower fan 11 of the blower unit 10 via the input shaft 6. Is configured to do. The medicine spreading vehicle 1 includes a tank 2 fixed on a frame 3. The tank 2 includes a chemical liquid tank 2a for storing chemical liquid, a hand washing water tank 2b for storing fresh water for hand washing, and a washing water tank 2c for storing fresh water for washing the chemical liquid tank 2a.

  The drug spraying vehicle 1 pumps the chemical solution from the chemical solution tank 2 a by driving the pump 4, and sprays the chemical solution from a plurality of spray nozzles 8 provided at the rear part of the drug spraying vehicle 1. The plurality of spray nozzles 8 are arranged, for example, in an arc shape along the outer peripheral portion of the discharge space S <b> 2 provided at the rear end portion of the medicine spreading vehicle 1. The chemical spraying vehicle 1 includes a blower unit 10 for diffusing the chemical sprayed from the spray nozzle 8 radially behind the tank 2. The drug distribution vehicle 1 travels while being pulled by a tractor, and sprays the drug solution radially toward the field. Between the input shaft 6 and the blower unit 10, a universal shaft for driving the blower fan 11, a mission (both not shown), and the like are provided.

  Next, the blower unit 10 will be described. The blower unit 10 includes a blower fan 11 that is rotationally driven around a rotation axis A that extends in the front-rear direction, and a cylindrical fan case 12 that houses the blower fan 11 so as to have a predetermined gap with respect to the blower fan 11. Is provided. The fan case 12 is fixed on, for example, the frame 3 so as to be disposed along the rotation axis A. A substantially circular suction port 13 is formed at the front end of the fan case 12, and a substantially circular discharge port 14 is formed at the rear end of the fan case 12. The blower unit 10 sucks air from the suction port 13 and discharges air from the discharge port 14 with a predetermined air volume and wind pressure.

  An intake space S1 is formed between the suction port 13 of the fan case 12 and the rear surface 2d of the tank 2. The intake space S1 adjacent to the suction port 13 is a substantially columnar space, has a diameter corresponding to the suction port 13, and has a predetermined length in the front-rear direction (that is, the direction of the rotation axis A). The air sucked by the blower unit 10 passes through the intake space S <b> 1 communicating with the suction port 13. More specifically, the sucked air is collected in the fan case 12 from above and from the left and right sides, across the outer periphery of the intake space S1, through the suction port 13, and so on.

  On the rear side of the discharge port 14 of the fan case 12, there is provided a jet plate 16 standing along a vertical plane. The jet plate 16 is substantially orthogonal to the rotational axis A, and a discharge space S <b> 2 is formed between the discharge port 14 and the jet plate 16. The discharge space S2 adjacent to the discharge port 14 is a substantially columnar space, has a diameter corresponding to the discharge port 14, and has a predetermined length in the front-rear direction (that is, the rotation axis A direction). The air discharged by the blower unit 10 flows into the discharge space S2 communicating with the discharge port 14, collides with the nozzle plate 16, and is ejected radially upward and laterally.

  The plurality of spray nozzles 8 described above are arranged along the outer periphery of the discharge space S2. For example, the spray nozzles 8 may be arranged in a semicircular shape on both the left and right sides. With such a configuration, the spray nozzle 8 is arranged in the flow of discharged air. The direction of the spray nozzle of each spray nozzle 8 is directed outward in the radial direction (outward in the radial direction), and the chemical liquid sprayed from the spray nozzle 8 is radially diffused along with the jetted air flow. .

  In the medicine spreading vehicle 1 of this embodiment, a shielding cover 20 that slides in the front-rear direction is provided, and the position of the shielding cover 20 can be adjusted and held by one touch to adjust the air flow rate. Moreover, it is not necessary to modify the internal structure of the blower unit 10, and the amount of blown air can be adjusted with a simple configuration. Hereinafter, a mechanism for adjusting the air flow rate in the blower unit 10 will be described.

  On the outer peripheral side of the fan case 12, a shielding cover 20 extending in an arc shape so as to cover the fan case 12 is provided. For example, the shielding cover 20 has an annular shape in which only the lower part is cut out. The shielding cover 20 has a predetermined length (width) in the front-rear direction. The length in the front-rear direction may be a length corresponding to the intake space S1. In that case, the shielding cover 20 can cover substantially the entire area of the intake space S1. The shielding cover 20 may have a size that can cover only a part of the intake space S1.

  The shielding cover 20 will be described in more detail. As shown in FIG. 3, the shielding cover 20 includes an upper bracket 23 extending in the front-rear direction along the top of the fan case 12, a pair of left and right upper covers 21 having upper ends connected to the upper bracket 23, a fan A pair of left and right side brackets 24 extending in the front-rear direction along the sides of the case 12 and connected to the lower end of the upper cover 21, and a pair of left and right lower covers 22 having the upper ends connected to the pair of side brackets 24. And have. The upper cover 21 and the lower cover 22 may be plate members having the same radius of curvature. The upper cover 21 and the lower cover 22 are integrated via an upper bracket 23 and a side bracket 24. The shielding cover 20 extends along the outer peripheral surface of the fan case 12 and has a predetermined gap with respect to the outer peripheral surface.

  In the medicine spreading vehicle 1, the shielding cover 20 covers the outer peripheral side of the fan case 12, and the opening position P1 (see FIG. 5A) where the outer peripheral portion of the intake space S1 is opened, and the shielding cover 20 is shifted from the fan case 12. A moving mechanism 30 configured to be able to move the shielding cover 20 is provided at a shielding position P2 (see FIG. 5B) that covers the outer periphery of the intake space S1.

  As shown in FIGS. 3 and 4, four upper rollers 33 that are rotatable about an axis extending in the left-right direction are attached inside the upper bracket 23. More specifically, a pair of upper rollers 33 are attached to the front portion of the upper bracket 23, and another pair of upper rollers 33 are attached to the rear portion of the upper bracket 23. These upper rollers 33 are fitted on, for example, two parallel upper rails 31 fixed to the rear end portion 12a of the fan case 12 via rail mounting plates 36. The two upper rails 31 extend in the front-rear direction along the outer surface of the fan case 12. These upper rails 31 may be fixed to only the rear end 12a of the fan case 12 and cantilevered with the same height, or the front end of the upper rail 31 may be fixed to the tank 2 or the like. It can be installed in a holding form. The upper rail 31 has a strength capable of supporting the shielding cover 20 placed on the upper rail 31. In FIG. 3, the upper bracket 23 and the side bracket 24 are partially broken.

  As shown in FIG. 3, two side rollers 34 that are rotatable about an axis extending in the vertical direction are attached to the inside of each side bracket 24. More specifically, one side roller 34 is attached to the front portion of the side bracket 24, and another side roller 34 is attached to the rear portion of the side bracket 24. These side rollers 34 are fitted on one side rail 32 fixed to the rear end portion 12a of the fan case 12 via a rail mounting plate 37, for example. The side rails 32 extend in the front-rear direction along the outer surface of the fan case 12. The side rail 32 may be fixed to only the rear end 12a of the fan case 12 and installed in a cantilevered manner, or the front end of the side rail 32 is fixed to the tank 2, the frame 3, etc. It can be installed in. The side rail 32 has a strength capable of supporting the shielding cover 20 placed on the side rail 32 in cooperation with the upper rail 31.

  A side roller 34 may be disposed below the side rail 32. Even in this case, the side roller 34 is fitted to the side rail 32 from below. In this case, the upper rail 31 and the side rail 32 are sandwiched from above and below by the upper roller 33 and the side roller 34 of the shielding cover 20.

  According to the shielding cover 20 and the moving mechanism 30 having the above configuration, the shielding cover 20 can be smoothly slid in the front-rear direction, and can be moved to any position in the front-rear direction. When the upper rail 31 is installed in a cantilever manner, a stopper 38 (see FIG. 3) made of a plate member or the like may be provided at the front end of the upper rail 31. The stopper 38 is provided on the track of the upper rail 31 and stops the upper roller 33 from moving forward. This prevents the shielding cover 20 from falling off the upper rail 31 when adjusting the position of the shielding cover 20. Such a stopper may be provided at the front end of the side rail 32.

  When the shielding cover 20 moves to the open position P1, most or all of the intake space S1 is opened, and the air flow path that connects the periphery of the intake space S1 and the intake space S1 is maximized. When the shielding cover 20 moves to the shielding position P2, most or all of the intake space S1 is closed, and the air flow path that connects the periphery of the intake space S1 and the intake space S1 is minimized. When the shielding cover 20 moves to an arbitrary intermediate position P3 (see FIG. 3) between the open position P1 and the shielding position P2, the air flow path that connects the periphery of the intake space S1 and the intake space S1 is It becomes the intermediate size between the maximum value and the minimum value. In the drug spreader 1 including the shielding cover 20, the size of the air flow path on the suction side of the blower unit 10 (strictly, the cross-sectional area of the cross section orthogonal to the flow direction) is adjusted by the movement of the shielding cover 20. As a result, the air flow rate is adjusted.

  As shown in FIGS. 3 and 4, the moving mechanism 30 further includes locking means 40 that can fix the position of the shielding cover 20 at a plurality of positions. The lock means 40 fixes the position of the shielding cover 20 in a state where the shielding cover 20 is located at the open position P1, the shielding position P2, and the intermediate position P3 between them.

  Referring to FIG. 4 in detail, the upper bracket 23 includes an upper member 23a having a C-shaped section opened downward and a lower member 23b having a C-shaped section opened upward. It has a structure in which these side plate portions are overlapped and fastened together by a fastening member 48 in a state where the roller shaft 47 penetrates. The upper member 23a and the upper member 23a form a rectangular parallelepiped space inside, and two upper rails 31 are inserted into the space. The pair of upper rollers 33 described above are placed in the space and placed on the upper rail 31.

  The locking means 40 is a circular guide bar 44 (see also FIG. 3) disposed between the two upper rails 31 and extending in parallel therewith, and a circular formed on the top plate portion of the upper member 23a. And a lock pin 41 inserted through the through hole 23c. The guide bar 44 is attached, for example, in the same manner as the upper rail 31, and the base end portion thereof is fixed to the rear end portion 12 a of the fan case 12 via the rail attachment plate 36. A straight shaft portion 41e of the lock pin 41 is provided with a spring 43 that is a compression coil spring in a portion below the top plate portion of the upper member 23a. A seat plate portion 42 is fixed to the lower portion of the shaft portion 41e, and the spring 43 is wound around the shaft portion 41e and compressed more than the free length, and the upper member 23a and the seat plate portion 42 of the upper bracket 23 are compressed. Between. That is, the upper end 43 a of the spring 43 is in contact with the back surface of the top plate portion of the upper member 23 a, and the lower end 43 b is in contact with the upper surface of the seat plate portion 42.

  The spring 43 biases the lock pin 41 downward. In other words, the lock pin 41 can move to a predetermined range in the vertical direction while receiving a biasing force by the spring 43. The hook portion 41c of the lock pin 41 protruding above the upper bracket 23 is bent in a U shape. The base end 41d of the lock pin 41 is in contact with the surface of the top plate portion of the upper member 23a. On the other hand, a plurality of circular positioning holes 46 penetrating in the thickness direction are formed in the guide bar 44 extending in the horizontal direction. As shown in FIG. 3, the plurality of positioning holes 46 are formed at a predetermined interval. As shown in FIG. 4, the engaging portion 41 a of the lock pin 41 is inserted into the positioning hole 46, and the tip 41 b projects downward from the guide bar 44. Accordingly, the upper bracket 23, that is, the shielding cover 20, is positioned and fixed in the front-rear direction. In this state, the spring 43 is compressed, the lock pin 41 receives the urging force of the spring 43, and the base end 41d of the lock pin 41 contacts the top plate portion of the upper member 23a.

  When adjusting the position of the shielding cover 20 using the locking means 40, the hook portion 41c of the lock pin 41 is pulled up to release the locked state, and the shielding cover 20 is moved forward or backward. The shielding cover 20 is stopped at a position where a desired air flow rate can be obtained, and the engaging portion 41a of the lock pin 41 is inserted into the positioning hole 46, and the shielding cover 20 is fixed. The rearmost positioning hole 46 formed in the guide bar 44 corresponds to the open position P1 of the shielding cover 20 (see FIG. 5A), and the frontmost positioning hole 46 formed in the guide bar 44. Corresponds to the shielding position P2 of the shielding cover 20 (see FIG. 5B). One or a plurality of positioning holes 46 formed in the middle thereof correspond to one or a plurality of intermediate positions P3.

  Since the lock pin 41 is pressed by the spring 43, the engaged state is not released by vibration or the like. The urging and pressing structure of the lock pin 41 may be different from the above structure. For example, the lock pin 41 may be urged by the spring 43 and pressed against the guide bar 44.

  According to the medicine spreading vehicle 1 of the present embodiment, the blower fan 11 is rotationally driven, and air is sucked from the suction port 13 of the fan case 12 through the intake space S1. The sucked air is discharged from the discharge port 14, and the sprayed medicine is diffused and dispersed. The shielding cover 20 covering the outer peripheral side of the fan case 12 can be moved by the moving mechanism 30 to an open position P1 that opens the outer peripheral portion of the intake space S1 and a shielding position P2 that covers the outer peripheral portion of the intake space S1. Therefore, the amount of air sucked from the suction port 13, that is, the amount of air blown in the blower unit 10 is adjusted. Since it is the structure which moves the shielding cover 20 which has a fixed shape, a structure is simple and the movement operation of the shielding cover 20 is also easy. Only the shielding cover 20 that shields the intake space S1 is required, and a component having a complicated mechanism is not required as in the prior art. Further, a tool or the like is not necessary for adjusting the position of the shielding cover 20. Furthermore, since the shielding cover 20 and the moving mechanism 30 are provided on the outer peripheral side of the fan case 12 and there is no member that interferes with the fan case 12 (except for the rail mounting portion), the existing blower unit 10 The shielding cover 20 and the moving mechanism 30 can be retrofitted. That is, it is possible to retrofit the air volume adjustment function.

  The moving mechanism 30 is configured to be able to slide the shielding cover 20 along the rotation axis A direction. Since it is only necessary to slide the shielding cover 20 by the moving mechanism 30, the moving operation of the shielding cover 20 is further simplified.

  Further, in the moving mechanism 30, the upper roller 33 rolls on the upper rail 31 and the side roller 34 rolls on the side rail 32, so that the shielding cover 20 can be smoothly slid.

  In addition, according to the configuration in which the shielding cover 20 includes the locking unit 40, the position of the shielding cover 20 can be fixed by the locking unit 40 after the position of the shielding cover 20 is adjusted so that a desired air flow rate is obtained. Thereby, the chemical spreader 1 can be stably operated for a predetermined time while maintaining a desired air flow rate. Since the position of the shielding cover 20 can be fixed at at least three positions (open position P1, intermediate position P3, and shielding position P2 (a total of four or more when there are a plurality of intermediate positions P3)), the amount of air flow can be adjusted with one touch. Can be done in stages.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, the locking means 40 is not limited to being configured by the lock pin 41 and the positioning hole 46 formed in the guide bar 44. For example, a protrusion or recess may be provided on the shielding cover 20 side (moving side), and a recess or protrusion that can be engaged with them may be provided on the blower fan 11 side (fixed side). The locking means 40 may be omitted.

  In the moving mechanism 30, one of the upper rail and roller and the side rail and roller may be omitted. The moving mechanism 30 that slides the shielding cover 20 is not limited to the case that includes a rail and a roller. For example, the moving mechanism may be configured such that a rib extending in the front-rear direction and a groove portion are fitted, and the shielding cover 20 is guided by the rib. A structure similar to the lock pin 41 and the positioning hole 46 may be provided in the side rail.

  The moving mechanism is not limited to the case where the shielding cover 20 is slid along the rotation axis A direction. The moving mechanism may include, for example, a link mechanism that supports the shielding cover 20, and may be configured to move the shielding cover 20 back and forth by the link mechanism or the like.

  In the above embodiment, the case where the suction port 13 is formed at the front end of the fan case 12 and the discharge port 14 is formed at the rear end of the fan case 12 has been described. However, the positional relationship in the front-rear direction is opposite to that. Also good. That is, a suction port 13 is formed at the rear end of the fan case 12, an intake space S1 is formed at the rear side of the fan case 12, and a discharge port 14 is formed at the front end of the fan case 12. The discharge space S2 may be formed in the upper part. In this case, the shielding cover 20 is moved by the moving mechanism to an open position P1 that covers the fan case 12 and a shielding position P2 that covers the outer periphery of the intake space S1 behind it. A chemical | medical solution is spread | diffused radially from between the tank 2 and the air blower part 10, and is spread | dispersed.

  The medicine spreading vehicle is not limited to the above-described towed speed sprayer, and may be a riding speed sprayer, for example. The present invention can be applied to any medicine sprayer (medicine spreader) including a blower unit.

  DESCRIPTION OF SYMBOLS 1 ... Drug distribution wheel, 2 ... Tank, 8 ... Spray nozzle, 10 ... Blower part, 11 ... Blower fan, 12 ... Fan case, 13 ... Suction port, 14 ... Discharge port, 20 ... Shielding cover, 21 ... Top cover, DESCRIPTION OF SYMBOLS 22 ... Lower cover, 23 ... Upper bracket, 24 ... Side bracket, 30 ... Moving mechanism, 31 ... Upper rail, 32 ... Side rail, 33 ... Upper roller, 34 ... Side roller, 40 ... Locking means, 41 ... Lock pin, 42 ... seat plate portion, 43 ... spring, 44 ... guide bar, 46 ... positioning hole, A ... rotation axis, S1 ... intake space, S2 ... discharge space.

Claims (4)

A blower fan (11) that is driven to rotate around the rotation axis (A); and a cylindrical fan case (12) that houses the blower fan (11), and the rotation axis (A) in the direction of the rotation axis (A). A blower unit (10) having a suction port (13) formed at one end of the fan case (12) and a discharge port (14) formed at the other end of the fan case (12) in the direction of the rotation axis (A); ,
A shielding cover (20) extending in an arc shape so as to cover the outer peripheral side of the fan case (12) of the blower section (10) and having a predetermined width in the direction of the rotation axis (A);
An open position (P1) where the shielding cover (20) covers the outer peripheral side of the fan case (12) and opens an outer peripheral portion of the intake space (S1) adjacent to the suction port (13), and the shielding cover (20) A medicine spreading vehicle (30) including a shielding position (P2) that covers the outer peripheral portion of the intake space (S1), and a moving mechanism (30) configured to move the shielding cover (20). 1).   The drug delivery vehicle (1) according to claim 1, wherein the moving mechanism (30) is configured to be able to slide the shielding cover (20) along the direction of the rotation axis (A). The moving mechanism (30)
At least one rail (31, 32) fixed to the fan case (12) and extending along the direction of the rotation axis (A);
The drug spreader (1) according to claim 2, comprising at least one roller (33, 34) attached to the shielding cover (20) and fitted to the rail (31, 32).   The moving mechanism (30) is configured so that the shielding cover (20) is at least between the opening position (P1), the shielding position (P2), the opening position (P1), and the shielding position (P2). The medicine according to any one of claims 1 to 3, further comprising locking means (40) capable of fixing the position of the shielding cover (20) in a state of being respectively located at one intermediate position (P3). Spreader (1).

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