JP6173970B2 - Scatter work vehicle - Google Patents

Description

  The present invention mainly relates to a spreading work vehicle including a spreading device. In detail, it is related with the transmission structure of the driving force with respect to a spreading device.

  In general, a riding type rice transplanter includes a seedling platform for mounting mat seedlings on the rear side of the vehicle body. In this type of rice transplanter, there is a case where a spraying device for spraying a medicine or the like is provided. Examples of the spraying device include a box application spraying device that sprays a box application agent on a mat seedling placed on a seedling stand, and a herbicide spraying device that sprays a herbicide on the ground. Can do. Such a spraying device is often arranged behind the seedling stage.

  Thus, in the rice transplanter in which the spraying device is arranged behind the seedling stage, there is a problem that the accessibility to the seedling stage is poor. For example, when the operator tries to remove the mat seedling remaining on the seedling mount, the spraying device becomes an obstacle and it is difficult to take out the mat seedling.

  In this regard, Patent Literature 1 discloses a configuration in which a spraying device (in the case of Patent Literature 1, a fertilizer application device) is movable. According to the configuration of Patent Document 1, since the fertilizer application device can be separated from the seedling stage, it is considered that the accessibility to the seedling stage is improved.

JP-A-5-268807

  Since the configuration of Patent Document 1 is a configuration in which the fertilizer is rotated around a support shaft (vertical axis of the transmission case), the amount of movement of the fertilizer is small at a position close to the support shaft, and the fertilizer is used as a seedling. The distance away from the platform is short. Therefore, the effect of improving the accessibility to the seedling platform is low at a position close to the support shaft.

  But even if it is a structure of patent document 1, if the fertilizer is rotated 180 degree | times around a spindle, for example, the back of a seedling mounting stand can be opened completely (the state where there is no fertilizing device behind the seedling mounting stand) Can). Therefore, in this state, the accessibility to the seedling table is not impaired even at a position close to the support shaft. However, a large space is required to rotate the fertilizer device 180 degrees around the support shaft. For this reason, for example, in a situation where the space is limited, such as in a garage, it is difficult to completely open the rear of the seedling platform.

  Accordingly, a main object of the present invention is to provide a configuration in which a work apparatus having a spraying device can be separated from the vehicle body as a whole by an easy work.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to an aspect of the present invention, a scattering work vehicle having the following configuration is provided. That is, the scattering work vehicle includes a travelable vehicle body, a spraying device, a main frame, an intermediate frame, and a support portion. The main frame supports the spraying device. The intermediate frame supports the main frame. The support portion supports the intermediate frame. The intermediate frame is supported so as to be rotatable relative to the support portion around a first rotation axis. The main frame is supported so as to be rotatable relative to the intermediate frame around a second rotation axis that is different in axis from the first rotation axis and is substantially parallel to the first rotation axis. This scattering work vehicle includes a transmission mechanism that includes a first transmission shaft, a second transmission shaft, and an intermediate transmission member. The first transmission shaft is disposed with its axis line coincident with the first rotation shaft. The second transmission shaft is disposed with its axis line coincident with the second rotation shaft. The intermediate transmission member transmits a driving force from the first transmission shaft to the second transmission shaft. The driving force input to the first transmission shaft is output from the second transmission shaft, and the spraying device is driven by this driving force.

  Thereby, a spreading device can be moved in a plane via the 1st rotation axis and the 2nd rotation axis. Therefore, the entire spraying device can be separated from the vehicle body. Further, since the first transmission shaft and the second transmission shaft of the transmission mechanism are provided so as to coincide with the respective rotation shafts, when the main frame is moved around the rotation shaft, the first transmission shaft and the second transmission shaft. There is no need to remove the transmission shaft. As a result, the work of separating and returning the spraying device from the vehicle body becomes extremely simple.

  The above-described scattering work vehicle preferably has the following configuration. That is, the bevel gear provided on the first transmission shaft meshes with the bevel gear provided on the intermediate transmission member. A bevel gear provided on the intermediate transmission member and a bevel gear provided on the second transmission shaft mesh with each other.

  Thereby, a driving force can be transmitted with a simple configuration between the first transmission shaft 52 and the second transmission shaft 58 arranged in parallel to each other.

  The above-described scattering work vehicle preferably has the following configuration. That is, the intermediate frame is configured as a hollow member. The intermediate transmission member is rotatably disposed inside the intermediate frame.

  As a result, the drive transmission path between the first transmission shaft and the second transmission shaft is arranged inside the intermediate frame, so that compactness is possible. In addition, as the intermediate frame rotates, the drive transmission path in the intermediate frame also moves integrally, so that the operator may interfere with the drive member during the operation of separating and returning the spraying device from the vehicle body. There is no need to worry.

  The above-described scattering work vehicle preferably has the following configuration. That is, the first transmission shaft, the intermediate transmission member, and the second transmission shaft are mechanically connected. The intermediate frame and the main frame can be rotated while the mechanical connection is maintained.

  This eliminates the need to separate the drive transmission path from the first transmission shaft to the second transmission shaft via the intermediate transmission member when the spraying device is separated from the vehicle body or returned, thereby making the operation easier. Become.

  The above-described scattering work vehicle preferably has the following configuration. That is, this spreading work vehicle has a seeding stage on which a seedling is placed and a planting part for planting the seedling on the ground. The said spraying device sprays a chemical | medical agent with respect to the seedling on the said seedling mounting stand. The power of the planting part is taken out and transmitted to the first transmission shaft.

  Thereby, since the spreading | diffusion apparatus can be driven using the motive power of a planting part, the compactization of a structure is realizable.

  The above-described scattering work vehicle preferably has the following configuration. In other words, this spray work vehicle includes a crank and a connecting rod. A driving force of the second transmission shaft is transmitted to the crank. The connecting rod is connected to the output shaft of the crank and transmits driving force to the spraying device. A rotation axis of the crank is arranged to coincide with the second rotation axis.

  Accordingly, the driving force can be transmitted to the spraying device by the transmission mechanism and driven. Further, since the crank rotates on the same axis as the second rotation axis, it is not necessary to remove the connecting rod when rotating the main frame around the second rotation axis. As a result, the spreading device can be easily moved around the rotation axis.

The side view of the rice transplanter which concerns on one Embodiment of this invention. A schematic plan view of a rice transplanter. The skeleton figure which shows the power transmission structure of a rice transplanter. The skeleton figure which shows the power transmission structure to a planting part, a box application agent spreading device, and a herbicide spreading device. The perspective view of a spraying unit. Side surface sectional drawing of a spraying unit. Front sectional drawing of the spraying unit which expands and shows a feeding roll. The schematic top view which shows the structure for waterproofing of a dispersion | spreading unit. The perspective view which shows arrangement | positioning of a rubber seal and an oil seal. The top view of a box application agent spreading device and a herbicide spreading device. The rear view which shows typically the transmission mechanism of a driving force. The typical top view which shows a mode that the main frame was moved. The typical top view which shows a mode that the back of the seedling mounting stand was opened completely. The perspective view which shows the transmission mechanism of a driving force.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a rice transplanter 1 as a work vehicle according to an embodiment of the present invention. This rice transplanter 1 has a vehicle body 2 including a front wheel 11, a rear wheel 12, and a driver seat 9, and is configured as a riding type rice transplanter.

  The rice transplanter 1 has an engine 10 as a drive source. The driving force of the engine 10 is output to the front wheels 11 and the rear wheels 12 via a transmission (not shown) and the like, and the front wheels 11 and the rear wheels 12 are rotationally driven. In the vicinity of the driver seat 9, an operation tool such as a steering handle 14 is appropriately disposed.

  The rice transplanter 1 also includes a planting unit 3 disposed behind the vehicle body 2, a box application agent spraying device (first spraying device) 4 and a herbicide spraying device (second spraying) attached to the planting unit 3. Device) 5. Further, the rice transplanter 1 includes a PTO shaft 13 that outputs the driving force of the engine 10 rearward.

  Further, an elevating link mechanism 31 for elevating the planting part 3 is provided at the rear part of the vehicle body 2. The planting part 3 is attached to the rear of the vehicle body 2 via the lifting link mechanism 31. The elevating link mechanism 31 includes a parallel link structure in which the planting portion 3 can be translated in the vertical direction with respect to the vehicle body 2 and an unillustrated elevating cylinder that drives the parallel link structure. Thereby, the planting part 3 can be driven up and down by driving the elevating cylinder.

  The planting unit 3 includes a planting case 32, a planting unit 36, and a seedling mount 39.

  As shown in FIG. 2, the planting part 3 of this embodiment has eight planting units 36 arranged in the left-right direction of the vehicle body. That is, the rice transplanter 1 of the present embodiment is configured as an eight-row planting rice transplanter.

  Each planting unit 36 is configured as a rotary planting device that includes two planting claws in the rotating case 50. Since the configuration of the rotary planting device is known, detailed description is omitted, but the planting claw scrapes off one seedling from the lower end of the mat seedling placed on the seedling mounting table 39 to be described later, It is configured to plant seedlings on the ground.

  The planting case 32 is connected to the rear portion of the vehicle body 2 via the lifting link mechanism 31. A total of four planting cases 32 are arranged, and one planting unit 36 is arranged on each side of each planting case 32.

  The planting case 32 is configured in a hollow cylindrical shape, and is arranged with its axial direction along the front-rear direction of the vehicle body 2. Inside the planting case 32, a transmission shaft for transmitting a driving force to the planting unit 36 (specifically, a planting transmission shaft 130 described later shown in FIG. 4) is arranged. The driving force of the engine 10 is input to the transmission shaft via the PTO shaft 13. Thereby, each planting unit 36 (rotating case 50) can be driven by the driving force of the engine 10.

  As shown in FIG. 1, the seedling mount 39 is disposed above the planting case 32. The seedling mount 39 has a mounting surface on which a mat seedling can be mounted. The mounting surface faces obliquely upward rearward. As the rice transplanter 1 of the present embodiment is for eight strips, the seedling mount 39 is configured so that eight strip seedling mats can be placed side by side in the vehicle body width direction.

  Then, the drive transmission path | route in the rice transplanter 1 of this embodiment is demonstrated with reference to FIG.3 and FIG.4. FIG. 3 is a skeleton diagram showing a power transmission configuration of the rice transplanter 1. FIG. 4 is a skeleton diagram illustrating a power transmission configuration according to the planting unit 3, the box application agent spraying device 4, and the herbicide spraying device 5.

  As shown in FIG. 3, the driving force of the engine 10 is input to a mission case 112 disposed in front of the engine 10 via a drive transmission belt 111. A hydraulic continuously variable transmission 113 is provided inside the mission case 112, and the driving force of the engine 10 is shifted by the hydraulic continuously variable transmission 113. As this hydraulic continuously variable transmission 113, for example, a known HST (hydrostatic continuously variable transmission) or the like can be employed. The gear ratio of the hydraulic continuously variable transmission 113 can be changed by the operator operating the shift pedal.

  Part of the output from the hydraulic continuously variable transmission 113 is input to the gear-type main transmission 115 via the main clutch 114, and is shifted. The main transmission 115 is configured to be switchable by an operator operating a main transmission lever. The main transmission lever is configured to be able to select at least the positions of “forward”, “reverse”, and “seed”. When the main shift lever is operated to the “advance” position, axles 116 and 117, which will be described later, are driven to rotate in the direction in which the vehicle body 2 is advanced. On the other hand, when the main shift lever is operated to the “reverse” position, the axles 116 and 117 are driven to rotate in the direction in which the vehicle body 2 is moved backward. Further, when the main transmission lever is operated to the “seed joint” position, the transmission of drive to the axles 116 and 117 and the PTO shaft 13 is cut off.

  A part of the rotational driving force changed by the main transmission 115 is transmitted to a front axle case 118 formed integrally with the transmission case 112, and rotationally drives the front axles 116L and 116R which are axles of the front wheels 11. Further, a part of the rotational driving force changed by the main transmission 115 is input to the rear axle case 120 via the propeller shaft 119 protruding rearward from the transmission case 112, and the rear axle 117L, which is the axle of the rear wheel 12. , 117R are driven. With the above configuration, the vehicle body 2 can be driven by driving the front wheels 11 and the rear wheels 12. The traveling speed of the vehicle body 2 can be arbitrarily changed by the operator operating the shift pedal.

  A left side clutch 121L is arranged between the drive transmission path from the propeller shaft 119 to the left rear axle 117L. Similarly, the right side clutch 121R is disposed between the drive transmission paths from the propeller shaft 119 to the right rear axle 117R. The left and right side clutches 121L and 121R can be switched between connection / disconnection independently.

  Part of the output of the hydraulic continuously variable transmission 113 is taken out from the rear end of the transmission case 112 and input to the planting transmission unit 123 via the planting drive transmission shaft 122. A speed change device including a plurality of gears is provided in the planting speed change unit 123, and is configured to appropriately shift the input driving force and output it from the PTO shaft 13. The planting part 3 shown in FIG. 4 is driven by the driving force transmitted by the PTO shaft 13. With the above configuration, the speed at which the planting unit 36 is driven can be changed.

  In the planting transmission unit 123 shown in FIG. 3, the driving force is transmitted to the PTO shaft 13 via the planting clutch 124. By cutting the planting clutch 124, the driving of the planting unit 3 can be stopped. The connection / disconnection of the planting clutch 124 can be switched by the operator operating a planting clutch operating lever (not shown). The planting clutch 124 can also be switched by a controller (not shown) that controls the operation of the vehicle body 2 and the planting unit 3 of the rice transplanter 1.

  The power output from the planting transmission unit 123 is input into the transmission housing 126 of the planting unit 3 shown in FIG. 4 via the PTO shaft 13. The driving force input to the transmission housing 126 is transmitted through a plurality of transmission shafts 127, a plurality of transmission gears 128, and the like, and a planting transmission shaft 130 and a rotation case driving shaft provided in each of the four planting cases 32 arranged side by side. 129. The rotating case 50 of the planting unit 36 is attached to both ends of the rotating case drive shaft 129.

  With the above configuration, the rotary case 50 can be rotationally driven, so that seedlings can be planted by the planting unit 36 configured as a rotary planting apparatus.

  The rotation of the rotation case drive shaft 129 of one of the four planting cases 32 is taken out via the bevel gear and output from a drive output bevel gear 60 disposed in the support case 33 described later. The rotation of the drive output bevel gear 60 is transmitted through an appropriate transmission mechanism, and the box application agent spraying device 4 and the herbicide spraying device 5 are driven. The details of this transmission mechanism will be described later.

  Then, the box application agent spreading device 4 with which a rice transplanter is provided is demonstrated. As shown in FIG. 1, the box application agent spraying device 4 is disposed behind the seedling mount 39.

  The box application agent spraying device 4 sprays the box application agent on the surface of the seedling mat (the seedling root) placed on the seedling mount 39. As shown in FIG. 2, the box application agent spraying device 4 includes a plurality of spraying units 44. In FIG. 2, the spreading unit 44 is schematically shown by a dotted line. A specific configuration of the spray unit 44 is shown in the perspective view of FIG.

  As shown in FIG. 5, each spraying unit 44 is configured by integrally assembling a hopper 45, a feeding portion 46, a shooter 47, and a feeding drive shaft (first drive input shaft) 48. .

  The hopper 45 is a container for containing a box application agent. In addition, it is assumed that the box application agent of this embodiment is a solid granular medicine. The hopper 45 is formed with an opening at its upper end, and includes a lid 45b that closes the opening. Further, the lower portion of the hopper 45 is opened, and a passage portion 45 a communicating with the feeding portion 46 is formed.

  For the hopper 45, a synthetic resin having high weather resistance is used. The hopper 45 is made of a transparent synthetic resin, which makes it easy to visually recognize from the outside what the internal medicine is and its remaining amount.

  The feeding portion 46 is connected to the lower portion of the passage portion 45 a of the hopper 45. The feeding portion 46 is configured to feed the box application agent in the hopper 45 by a predetermined amount and drop it onto the shooter 47.

  The shooter 47 is a pipe-like member, and is arranged so that its tip is located near the surface of the mat seedling (the root of the seedling). Since the shooter 47 is made of an elastically deformable material such as rubber, the shooter 47 can be prevented from getting tangled with the seedling.

  With the above configuration, the box application agent in the hopper 45 is fed out by a predetermined amount by the feeding unit 46, so that the box application agent can be sprayed on the surface of the mat seedling through the shooter 47.

  One spraying unit 44 is configured to spray two strips of box application agent. Specifically, the lower portion of the hopper 45 is divided into two forks, and a passage portion 45 a communicating with the feeding portion 46 is formed at the lower end portion of the divided portion. In each passage portion 45a, a feeding portion 46 and a shooter 47 are provided. Since the rice transplanter 1 of the present embodiment is eight-row planting, the box application agent spraying device 4 includes four spraying units 44. Thereby, the box application agent spraying device 4 can spray the box application agent for eight strips.

  In addition, a plate-like partition plate 86 is provided inside the hopper 45 so as to divide the internal space at the bifurcated portion. Thereby, the bias | inclination of a chemical | medical agent can be prevented.

  Next, the configuration of the feeding portion 46 will be described in detail with reference to FIGS. The feeding unit 46 includes a feeding case 24 and a feeding roll 25.

  The feeding case 24 is attached to the lower part of the hopper 45. The feeding roll 25 is disposed in a space surrounded by the feeding case 24 and the hopper 45 (see FIGS. 6 and 7). The feeding roll 25 is formed in a thick disk shape. As shown in the side sectional view of FIG. 6, a plurality of recesses 25 a are formed on the circumferential surface of the feeding roll 25 at predetermined intervals in the circumferential direction. The granular box application agent in the hopper 45 is supplied to the upper side of the feeding roll 25 through the passage portion 45a. The supplied box application agent is taken in a certain amount into each recess 25a. By intermittently driving the feeding roll 25 by a predetermined angle, the box application agent in the hopper 45 can be fed toward the shooter 47 at a predetermined supply speed.

  The feeding roll 25 is fixed to the feeding drive shaft 48 with its axis line aligned. Specifically, a cylindrical shaft portion protrudes from both axial end surfaces of the feeding roll 25, and a regular hexagonal shaft hole is formed in the shaft portion and the feeding roll 25 as shown in FIG. On the other hand, the feeding drive shaft 48 has a regular hexagonal cross section corresponding to the shaft hole. Accordingly, the feeding roll 25 can be rotated integrally with the feeding drive shaft 48 by inserting the feeding drive shaft 48 into the shaft hole of the feeding drive shaft 48.

  As shown in FIG. 5, a unit-side clutch member 49 is attached to one end of the feeding drive shaft 48 so as not to be relatively rotatable. The unit side clutch member 49 is formed with a clutch pawl. When the rotational driving force is input to the unit side clutch member 49, the feeding drive shaft 48 (and the feeding roll 25 fixed thereto) is driven to rotate about the axis, and the box application agent in the hopper 45 is fed out. It is.

  As shown in the side cross-sectional view of FIG. 6, the feeding portion 46 includes a seal member 26 that is disposed so as to contact the peripheral surface of the feeding roll 25. Moreover, as shown in the front sectional view of FIG. 7, flanges 25 b that protrude radially outward are formed at both ends in the axial direction of the feeding roll 25. On the other hand, a labyrinth seal portion 45c is formed at the lower end of the passage portion 45a. As shown in FIG. 7, the labyrinth seal portion 45 c is disposed so as to contact the flange portion 25 b of the feeding roll 25 from the axial direction of the feeding roll 25 (left and right direction in FIG. 7). As described above, by providing the seal member 26 and the labyrinth seal portion 45c, it is possible to prevent the medicine (box application agent) in the hopper 45 from passing out around the feeding roll 25 and flowing downward. doing.

  By the way, as mentioned above, it is assumed that the box application agent of this embodiment is a solid granular medicine. Since such a granular medicine has a relatively large size (diameter), it cannot go over the seal member 26 or the labyrinth seal portion 45c. However, in the hopper 45 and the feeding case 24, the medicine may be crushed or scraped to generate fine powder. Such fine powder may get over between the feeding roll 25 and the hopper 45 or the feeding case 24 over the seal member 26 and the labyrinth seal portion 45c. In this case, when the feeding roll 25 is driven to rotate, the feeding roll 25 and the hopper 45 or the feeding case 24 are rubbed with each other through the powder, so that the feeding roll 25, the hopper 45 or the feeding case 24 is worn. There is a problem of progress.

  Therefore, in the box application agent spraying device 4 of the present embodiment, as shown in FIG. 7, a gap 45 d is formed between the axial end surface of the feeding roll 25 and the hopper 45. Further, as shown in FIG. 7, a gap 24 d is formed between the axial end surface of the feeding roll 25 and the feeding case 24. Here, the width of the gaps 45d and 24d is preferably 0.5 mm or more. By providing the gaps 45d and 24d in this way, even if powder enters between the feeding roll 25 and the hopper 45 or the feeding case 24, the width of the gaps 45d and 24d is larger than the size (diameter) of the powder. Therefore, the powder does not get caught between the feeding roll 25 and the hopper 45 (or the feeding case 24). Thereby, it can prevent that abrasion of the supply roll 25, the hopper 45, and the supply case 24 advances.

  The gap 45d and the gap 24d communicate with each other. Further, as shown in FIG. 7, the lower portion of the gap 24d is open and communicates with the above-described shooter 47 (see FIG. 6). According to this configuration, even if powder enters the gap 45d or the gap 24d, the powder falls downward from the gap 24d and is discharged to the outside through the shooter 47. Therefore, no powder is collected in the gaps 45d and 24d.

  Next, the structure for waterproofing in the junction part of the hopper 45 and the feeding case 24 is demonstrated with reference to FIG.8 and FIG.9.

  As shown in FIGS. 8 and 9, a horizontal plate-like joining plate portion is formed at the lower end portion of the hopper 45 and the upper end portion of the feeding case 24, and these joining plate portions are made up of bolts, nuts and the like. By being attached by the fixing means, the hopper 45 and the feeding case 24 are coupled.

  Then, a pair of rubber seals 87 are attached to the mating surfaces of the joining plate portion so as to sandwich the rotation axis of the feeding roll 25. As shown in FIGS. 8 and 9, each rubber seal 87 is arranged while being bent so as to bypass the feeding roll 25. Further, ring-shaped oil seals 88 are respectively attached to the end portions of the shaft portions protruding from both axial end surfaces of the feeding roll 25, and are in close contact with the hopper 45 and the feeding case 24. By these, waterproofness and mudproofness are improved.

  Subsequently, the herbicide spraying device 5 will be described. The herbicide spraying device 5 is a device that sprays the herbicide on the ground after seedlings are planted.

  As shown in FIGS. 1 and 2, the herbicide spraying device 5 is disposed further rearward of the box application agent spraying device 4. The herbicide spraying device 5 includes a hopper 16, a feeding portion 17, and a spray cover 18. In addition, in FIG. 2, the herbicide spraying apparatus 5 is typically shown with the dotted line.

  The hopper 16 of the herbicide spraying device 5 is a container for storing the herbicide. In this embodiment, it is assumed that the herbicide is a solid granular drug. In addition, the herbicide spraying apparatus 5 of this embodiment has only one hopper.

  The feeding portion 17 is connected to the lower portion of the hopper 16. The feeding unit 17 includes a feeding roll (not shown) and a weeding drive shaft 17a (second driving input shaft, FIG. 1) to which a driving force for rotationally driving the feeding roll is input. By rotating the feeding roll, the herbicide in the hopper 16 is fed out by a predetermined amount.

  A spray cover 18 is disposed below the feeding portion 17. As shown in FIG. 10, the spray cover 18 is elongated along the left-right direction of the vehicle body. The lower part of the spray cover 18 is open. Further, an unillustrated feeding blade is disposed inside the spray cover 18 and immediately below the feeding roll. Further, the herbicide spraying device 5 includes an electric motor (not shown) for rotationally driving the feeding blade at a high speed.

  This type of herbicide spraying device is well known as described in, for example, Japanese Patent Application Laid-Open No. 2000-175512, and thus detailed description thereof is omitted. The manner in which the herbicide is sprayed will be briefly described as follows. That is, the herbicide fed by the feeding roll falls on the feeding blade. Since the feeding blade is rotationally driven at high speed by an electric motor, the herbicide is blown off by centrifugal force. The blown herbicide is guided by the spray cover 18 so as to diffuse left and right, and is discharged from the lower part of the spray cover and falls to the ground.

  With the above configuration, the herbicide in the hopper 16 can be dispersed to the left and right and sprayed on the ground.

  Then, the support structure of the said box application agent spraying apparatus 4 and the herbicide spraying apparatus 5 is demonstrated with reference to FIG.2, FIG.10, FIG.11 etc. FIG. In addition, in FIG. 11, illustration of the herbicide spraying apparatus 5 is abbreviate | omitted. Moreover, in FIG. 11, the transmission shaft for transmitting a driving force, etc. are transparently shown by the thick line.

  The rice transplanter 1 includes a main frame 6 for supporting the spreading devices 4 and 5. As shown in FIG. 11, the main frame 6 is disposed substantially parallel to the horizontal plane. As will be described in detail later, the main frame 6 is movable in a horizontal plane (see FIGS. 12 and 13). In this specification, the position of the main frame (the position shown in FIG. 2 and the like) at the time of work (when seedlings are planted by the planting unit 3) is referred to as “work position”. As shown in FIG. 2, the main frame 6 at the work position is arranged along the left-right direction of the vehicle body. Hereinafter, the description will be made assuming that the main frame 6 is in the “working position” unless otherwise specified.

  As shown in FIGS. 10 and 11, the rice transplanter 1 includes a subframe 20 disposed in parallel with the main frame 6. The sub frame 20 is fixed to the main frame 6 via the stay 21. Each spraying unit 44 is attached to the subframe 20. As shown in FIG. 10, the subframe 20 is positioned in front of the main frame 6 in plan view. As shown in FIG. 10, the plurality of spraying units 44 included in the box application agent spraying device 4 are arranged side by side along the length direction of the subframe 20. Thereby, the spraying unit 44 is arranged side by side in the left-right direction of the vehicle body 2.

  As shown in FIG. 10, the herbicide spraying device 5 is fixed to the main frame 6 via a stay 22. As shown in FIG. 10, the herbicide spraying device 5 is arranged so that the longitudinal direction of the spray cover 18 is parallel to the main frame 6. In plan view, the herbicide spraying device 5 is arranged on the opposite side of the box application agent spraying device 4 with the main frame 6 interposed therebetween. Therefore, the herbicide spraying device 5 is arranged behind the box application agent spraying device 4 in plan view.

  As described above, the box application agent spraying device 4 and the herbicide spraying device 5 are fixedly attached to the main frame 6.

  Subsequently, a characteristic configuration of the present embodiment will be described.

  As described above, in the rice transplanter 1 of the present embodiment, the box application agent spraying device 4 and the herbicide spraying device 5 are arranged behind the seedling mount 39. For this reason, in the state as it is, there exists a problem that the accessibility to the seedling mounting stand 39 is bad.

  Therefore, in the present embodiment, the box application agent spraying device 4 and the herbicide spraying device 5 are configured to be moved in a direction away from the seedling mount 39.

  Hereinafter, a specific description will be given with reference to FIGS. 2 and 11 to 14. In addition, in FIG.2, FIG.12, FIG.13, the box application agent spreading device 4 and the herbicide spreading device 5 are shown with the dotted line. Moreover, in FIG. 11, while showing the box application agent spreading device 4 with a dotted line, illustration of the herbicide spreading device 5 is abbreviate | omitted. Further, in FIG. 14, the rightmost planting case 32 and the main frame 6 are shown by chain lines, and the other planting case 32, the box application agent spraying device 4, the herbicide spraying device 5 and the like are illustrated. Is omitted.

  As shown in FIGS. 12 and 13, the present embodiment has a configuration in which the main frame 6 can be moved backward so as to be separated from the seedling mount 39. Since the box application agent spraying device 4 and the herbicide spraying device 5 are attached to the main frame 6, the spraying devices 4 and 5 are separated from the seedling mount 39 by moving the main frame 6 as described above. Can be made.

  Thus, by separating the spraying devices 4 and 5 from the seedling stage 39, the seedling stage 39 can be easily accessed. For example, it becomes easy to perform an operation of removing the mat seedling remaining on the seedling mount 39.

  Next, a configuration for moving the main frame 6 as described above will be described.

  As shown in FIGS. 2 and 11, a support case 33 is fixed to any one rear end of the plurality of planting cases 32 provided in the rice transplanter 1. As shown in FIG. 2, in the present embodiment, a support case 33 is fixed to the rear end of the rightmost planting case 32. The support case 33 is formed in a hollow cylindrical shape, and is arranged with its axis line oriented in a substantially vertical direction as shown in FIGS. 11 and 14. Since the main frame 6 can rotate around the axis of the support case 33, this axis may be hereinafter referred to as the first rotation shaft 51. A first transmission shaft 52 is arranged inside the support case 33 so that the axis line coincides with the first rotation shaft 51.

  A first bevel case 34 is connected to the upper end of the support case 33. As shown in FIG. 14, the first bevel case 34 is configured in a hollow cylindrical shape, and the first bevel case 34 is rotatably supported by the support case 33 by covering the lower end portion of the first bevel case 34 with the support case 33. Can do. The first bevel case 34 is formed in a hollow shape, and bevel gears 35 and 37 are disposed therein.

  An end of one side of the intermediate frame 38 in the longitudinal direction (the right end in FIGS. 11 and 14) is fixed to the first bevel case 34. The intermediate frame 38 has a hollow cylindrical shape. The intermediate frame 38 is arranged so that its axis is substantially horizontal. An intermediate shaft (intermediate transmission member) 41 is disposed inside the intermediate frame 38.

  A second bevel case 53 is fixed to the other end of the intermediate frame 38 (the left end in FIGS. 11 and 14). The second bevel case 53 is formed in a hollow shape, and bevel gears 54 and 55 are disposed therein.

  A drive output case 56 is fixed to the upper part of the second bevel case 53. The drive output case 56 is configured in a hollow cylindrical shape, and is arranged with its axis line oriented in a substantially vertical direction, as shown in FIGS. 11 and 14. Since the main frame 6 can rotate around the axis of the drive output case 56, this axis may be hereinafter referred to as a second rotation shaft 57. Inside the drive output case 56, a second transmission shaft 58 is arranged with its axis line coincident with the second rotation shaft 57.

  A hollow cylindrical support shaft 66 is put on the outside of the drive output case 56 so as to be rotatable. The main frame 6 is fixed to the support shaft 66 via a fixing stay or a bracket (not shown). ing. Accordingly, the main frame 6 is supported by the support case 33 via the first bevel case 34, the intermediate frame 38, the second bevel case 53, and the drive output case 56.

  As described above, in the present embodiment, the main frame 6 is supported by the support case 33 provided in the rightmost planting case 32, so the main frame 6 (and the spraying devices 4 and 5 supported by the main frame 6). ) Will be added to the rightmost planting case 32. Therefore, in this embodiment, as shown in FIG. 11, the support column 59 is provided in a planting case 32 other than the right end (in this embodiment, the planting case 32 at the left end). The support | pillar 59 is comprised so that the main frame 6 of a working position can be supported from the bottom (state of FIG. 11). By providing the support 59 in the leftmost planting case 32 in this manner, the weight of the main frame 6 (and the spraying devices 4 and 5 supported by the main frame 6) is distributed and supported by the left and right planting cases 32. Can do. Accordingly, it is possible to prevent the weight from being excessively concentrated on the rightmost planting case 32 and to prevent the main frame 6 from being glazed due to vibration during operation.

  The first bevel case 34 is configured to be rotatable relative to the support case 33 around the first rotation shaft 51. An intermediate frame 38 is fixed to the first bevel case 34. Thereby, the intermediate frame 38 can rotate relative to the support case 33 around the first rotation shaft 51.

  Further, the support shaft 66 is configured to be rotatable relative to the drive output case 56 around the second rotation shaft 57. The main frame 6 is fixed to the support shaft 66. Thereby, the main frame 6 can rotate relative to the intermediate frame 38 around the second rotation shaft 57.

  As described above, the two rotating shafts 51 and 57 are interposed between the main frame 6 and the support case 33. Thereby, the main frame 6 can move with respect to the support case 33 via the rotation shafts 51 and 57.

  Here, the second rotation shaft 57 is not disposed on the same axis as the first rotation shaft 51. Therefore, the main frame 6 can move via two different rotating shafts 51 and 57. Since the first rotation shaft 51 and the second rotation shaft 57 are arranged along the substantially vertical direction, the main frame 6 can move in a horizontal plane.

  Patent Document 1 describes a configuration in which a fertilizer application device is rotated around one axis and separated from a seedling table. However, in this configuration, there is a problem that the distance at which the fertilizer application apparatus is separated from the seedling stage is short near the shaft.

  In this regard, in the configuration of the above-described embodiment, the main frame 6 can move via two different rotating shafts 51 and 57. Therefore, the spreading devices 4 and 5 can be moved via two different rotating shafts 51 and 57. According to this, since the movement of the spraying devices 4 and 5 is not limited to around one axis, the spraying devices 4 and 5 can be entirely separated from the seedling mount 39 (FIG. 12).

  In the present embodiment, as shown in FIG. 11, the drive output case 56 is provided near the center of the main frame 6 in the longitudinal direction. Further, when the main frame 6 is in the working position, the first bevel case 34 is arranged in the vicinity of the end of the main frame 6 (the right end in the case of FIG. 11). That is, in the present embodiment, when the main frame 6 is in the working position, the first rotation shaft 51 is near the end of the main frame 6 and the second rotation shaft 57 is near the center in the longitudinal direction of the main frame 6. Are arranged respectively.

  Accordingly, the length of the intermediate frame 38 in the longitudinal direction is shorter than that of the main frame 6. More specifically, as shown in FIG. 11 and the like, the intermediate frame 38 is about half as long as the main frame 6. Thus, since the intermediate frame 38 is configured to be relatively short, the trajectory when the intermediate frame 38 rotates around the first rotation shaft 51 is relatively compact. Thereby, the main frame 6 can be moved along a relatively compact locus. Therefore, it is easy to move the main frame 6 (and the spraying devices 4 and 5 attached thereto) even in a narrow space such as in a garage.

  Moreover, as shown in FIG. 13, it is also possible to completely open the rear of the seedling table 39 (the state where there is no spraying device 4 or 5 behind the seedling table 39). More specifically, the intermediate frame 38 is rotated about 180 degrees around the first rotation shaft 51, and is disposed so as to protrude toward the right side of the vehicle body as shown in FIG. Further, the main frame 6 is rotated about 90 degrees around the second rotation shaft 57 with respect to the intermediate frame 38, so that the longitudinal direction of the main frame 6 and the longitudinal direction of the intermediate frame 38 are as shown in FIG. In a plan view, the state is substantially orthogonal.

  In this way, by moving the main frame 6 to the position of FIG. 13, the rear of the seedling mount 39 can be completely opened. Moreover, according to the structure of this embodiment, as shown in FIG. 13, it can arrange | position so that a part of longitudinal direction of the main frame 6 may be located in the right side of the seedling mounting stand 39. FIG. Thereby, when the back of the seedling stage 39 is completely opened, the space required in the front-rear direction can be reduced. Further, in this state, as shown in FIG. 13, the longitudinal direction of the main frame 6 can be arranged so as to be substantially parallel to the longitudinal direction of the vehicle body 2. Thereby, when the rear of the seedling stage 39 is completely opened, the space required in the left-right direction can be reduced. Accordingly, the rear of the seedling table 39 can be completely opened even in a narrow space such as in a garage.

  In the present embodiment, as described above, since the spraying devices 4 and 5 can be moved around two axes, the freedom of movement of the spraying devices 4 and 5 is relatively high. For this reason, if there is no restriction on the movement of the spraying devices 4 and 5, the spraying device may collide with the seedling table 39 or the like.

  Therefore, in this embodiment, the link mechanism 85 is provided so as to limit the movement of the main frame 6. The link mechanism 85 is configured by a link rod or the like, and interlocks the rotation of the intermediate frame 38 around the first rotation shaft 51 and the rotation of the main frame 6 around the second rotation shaft 57. It is configured to let you.

  More specifically, the relative rotation direction of the intermediate frame 38 relative to the support case 33 around the first rotation shaft 51 and the relative rotation of the main frame 6 relative to the intermediate frame 38 around the second rotation shaft 57. The link mechanism 85 is configured so that the direction is opposite. Then, when the main frame 6 is rotated about 90 degrees clockwise from the working position around the second rotation shaft 57 with respect to the intermediate frame 38, the intermediate frame 38 is moved relative to the support case 33. The link mechanism 85 is configured to rotate 180 degrees counterclockwise around the one rotation shaft 51. Thereby, the main frame 6 can be moved from the position shown in FIG. 2 to the position shown in FIG. 13 through the position shown in FIG.

  The main frame 6 (and the spraying device attached thereto) is prevented by the link mechanism 85 so that the main frame 6 (and the spraying devices 4 and 5 attached thereto) do not collide with the seedling mount 39 or the like. 4, 5) can be moved.

  Further, in the present embodiment, a locking mechanism (not shown) is provided on the above-described support column 59, and the main frame 6 can be fixed at the working position (the state shown in FIG. 11). Thereby, it is possible to prevent the main frame 6 (and the spraying devices 4 and 5 attached thereto) from moving without permission. If the lock mechanism is released, the main frame 6 (and the spraying devices 4 and 5 attached thereto) can be moved away from the seedling mount 39.

  Next, a configuration for transmitting driving force to the feeding roll of the box application agent spraying device 4 and the feeding roll of the herbicide spraying device 5 will be described.

  As shown in FIGS. 11 and 14, a drive output bevel gear 60 is disposed in the support case 33. The driving output bevel gear 60 has a driving force from a planting transmission shaft (not shown) in a planting case 32 (in the present embodiment, the planting case 32 at the right end) to which the support case 33 is fixed. Is entered. As a result, the drive output bevel gear 60 is rotationally driven in the support case 33.

  As shown in FIGS. 11 and 14, a bevel gear 61 is arranged in the support case 33. The bevel gear 61 is disposed so as to mesh with the drive output bevel gear 60. The bevel gear 61 is fixed to the lower end portion of the first transmission shaft 52 described above.

  The above-described bevel gear 35 is fixed to the upper end of the first transmission shaft 52. On the other hand, as shown in FIGS. 11 and 14, a bevel gear 37 is fixed to one end of the intermediate shaft 41 (the right end in FIGS. 11 and 14). The bevel gears 35 and 37 mesh with each other inside the first bevel case 34.

  A bevel gear 54 is fixed to the other end of the intermediate shaft 41 (the left end in FIGS. 11 and 14). On the other hand, the bevel gear 55 is fixed to the lower end of the second transmission shaft 58 described above. The bevel gears 54 and 55 mesh with each other inside the second bevel case 53.

  With the above configuration, the driving force output from the drive output bevel gear 60 is transmitted to the second transmission shaft 58 via the first transmission shaft 52 and the intermediate shaft 41.

  A crank 62 is fixed to the upper end of the second transmission shaft 58. Thus, the crank 62 is rotationally driven around the axis line of the second transmission shaft 58 (second rotation shaft 57). The crank 62 is provided with an output shaft 63. The output shaft 63 is arranged in parallel with the second rotation shaft 57 and eccentrically at a position shifted from the second rotation shaft 57. With the above configuration, the output shaft 63 rotates eccentrically around the second rotation shaft 57.

  As described above, the transmission path for transmitting the driving force from the support case 33 to the crank 62 is configured. As described above, the first transmission shaft 52 is disposed with its axis line aligned with the first rotation shaft 51, and the second transmission shaft 58 is disposed with its axis line aligned with the second rotation shaft 57. ing. Thereby, even if the main frame 6 (and the spraying devices 4 and 5 supported by the main frame 6) are moved around the rotation shafts 51 and 57, the transmission path is not affected.

  As shown in FIG. 10, the ends of the first connecting rod 64 and the second connecting rod 65 are connected to the output shaft 63 of the crank 62. The connecting rods 64 and 65 reciprocate as the output shaft 63 rotates eccentrically.

  As shown in FIG. 10, the end of the first connecting rod 64 is connected to a one-way clutch 68. The one-way clutch 68 converts the reciprocating motion of the first connecting rod 64 into an intermittent rotational motion and transmits it to the box application shaft 72.

  The box transmission shaft 72 is disposed along the longitudinal direction of the subframe 20. As shown in FIG. 10, first drive transmission gears 73 are fixed to both ends of the box transmission shaft 72. As shown in FIG. 10, a second drive transmission gear 74 that meshes with the first drive transmission gear 73 is provided.

  The first drive transmission gear 73 and the second drive transmission gear 74 are accommodated in a gear case 77. The gear case 77 is fixed to the subframe 20.

  As shown in FIG. 10, the second drive transmission gear 74 is provided with a frame-side clutch member 76 that rotates integrally with the second drive transmission gear 74. A clutch pawl is formed on the frame side clutch member 76. The frame side clutch member 76 is configured to be able to mesh with the unit side clutch member 49 provided in the spraying unit 44.

  With the above configuration, the intermittent rotational driving force, which is the main force of the one-way clutch 68, can be transmitted to the unit-side clutch member 49. As described above, when the driving force is input to the unit-side clutch member 49, the feeding roll 25 can be rotationally driven around the axis. In this manner, the feeding rolls 25 included in each spraying unit 44 can be driven to rotate intermittently by the reciprocating motion of the first connecting rod 64.

  The feeding drive shaft 48 of each spraying unit 44 is provided with a biasing member (not shown) that biases the unit side clutch member 49 toward the frame side clutch member 76. The state where the unit side clutch member 49 and the frame side clutch member 76 are engaged can be maintained by the urging force of the urging member.

  As shown in FIG. 5, the clutch pawls formed on the unit side clutch member 49 have a simple configuration in which only two are provided in the circumferential direction, and the clutch pawls formed on the frame side clutch member 76 are the same. is there. Thus, since the number of clutch claws is as small as two, cleaning when mud adheres is facilitated. Furthermore, a bellows-like boot cover 89 is provided on the unit-side clutch member 49 that is movable in the axial direction. With these configurations, waterproofness and mudproofness are enhanced, and mud biting and the like can be prevented.

  Corresponding to each spraying unit 44, a clutch operation section (not shown) is arranged. The clutch operation unit is configured to be able to move the unit-side clutch member 49 in a direction to move away from the frame-side clutch member 76 against the urging force of the urging member. By separating the unit-side clutch member 49 from the frame-side clutch member 76, no driving force is input to the feeding drive shaft 48, so that the driving of the feeding roll 25 can be stopped.

  On the other hand, as shown in FIG. 10, the second connecting rod 65 is arranged in a direction substantially opposite to the first connecting rod 64. The end of the second connecting rod 65 is connected to a not-shown one-way clutch. This one-way clutch converts the reciprocating motion of the second connecting rod 65 into an intermittent rotational motion and transmits it to the weeding drive shaft 17a (FIG. 2).

  With the above configuration, the feeding roll (not shown) included in the herbicide spraying device 5 can be intermittently driven by the reciprocating motion of the second connecting rod 65.

  In this way, by connecting the two connecting rods 64 and 65 to one output shaft 63, the driving force can be distributed to the box application agent spraying device 4 and the herbicide spraying device 5. it can.

  Since the crank 62 is disposed on the second rotation shaft 57, the connecting rods 64 and 65 need to be removed from the output shaft 63 when the main frame 6 is rotated around the second rotation shaft 57. There is no. That is, according to the configuration of the present embodiment, the main frame 6 (and the spraying devices 4 and 5 supported by the main frame 6) can be moved with the connecting rods 64 and 65 attached.

  In the present embodiment, as shown in FIG. 10, when viewed in the direction of the rotation shaft (second transmission shaft 58) of the crank 62, the direction in which the first connecting rod 64 extends from the output shaft 63, and the output shaft 63. To the direction in which the second connecting rod 65 extends.

  More specifically, as shown in FIG. 10, the first connecting rod 64 is disposed forward from the output shaft 63 in plan view. On the other hand, the second connecting rod 65 is disposed rearward from the output shaft 63 in plan view.

  Thus, since the two connecting rods 64 and 65 are connected to the output shaft 63 from substantially the opposite direction, the output shaft 63 pushes the first connecting rod 64 when the crank 62 is driven to rotate. In some cases, the second connecting rod 65 is pulled by the output shaft 63. Conversely, when the output shaft 63 is pulling the first connecting rod 64, the second connecting rod 65 is pushed by the output shaft 63.

  That is, in this embodiment, the direction in which the first connecting rod 64 is connected to the output shaft 63 and the direction in which the second connecting rod 65 is connected to the output shaft 63 are configured to be different. Therefore, the timing pulled by the output shaft 63 differs between the two connecting rods 64 and 65. For this reason, the timing at which the feeding roll 25 of the box application agent spraying device 4 is intermittently driven is shifted from the timing at which the feeding roll of the herbicide spraying device 5 is intermittently driven. As a result, the load applied to the rotating shaft of the crank 62 is dispersed, so that the crank 62 can be smoothly rotated.

  In particular, in this embodiment, since the connecting rod 64 is connected to the output shaft 63 from a substantially opposite direction, the timing at which the first connecting rod 64 is pulled by the output shaft 63 and the second connecting rod 65 are output. The timing pulled by the shaft 63 does not overlap. Thereby, the load applied to the rotating shaft of the crank 62 becomes substantially equal, and the crank 62 can be smoothly rotated.

  In the present embodiment, as shown in FIG. 10, a crank 62 is disposed between the box application agent spraying device 4 and the herbicide spraying device 5 in a plan view. As a result, a layout in which the two connecting rods 64 and 65 are connected to the output shaft 63 of the crank 62 from the opposite direction can be easily realized.

  As described above, the rice transplanter 1 according to this embodiment includes the vehicle body 2 that can travel, the box application agent spraying device 4, the main frame 6, the intermediate frame 38, and the support case 33. The main frame 6 supports the box application agent spraying device 4. The intermediate frame 38 supports the main frame 6. The support case 33 supports the intermediate frame 38. The intermediate frame 38 is supported so as to be rotatable relative to the support case 33 around the first rotation shaft 51. The main frame 6 is supported so as to be rotatable relative to the intermediate frame 38 around a second rotation shaft 57 having a different axis from the first rotation shaft 51 and substantially parallel to the first rotation shaft 51. The The rice transplanter 1 includes a transmission mechanism including a first transmission shaft 52, a second transmission shaft 58, and an intermediate shaft 41. The first transmission shaft 52 is arranged so that the axis line coincides with the first rotation shaft 51. The second transmission shaft 58 is disposed so that the axis line coincides with the second rotation shaft 57. The intermediate shaft 41 transmits driving force from the first transmission shaft 52 to the second transmission shaft 58. A rotational driving force is output from the support case 33 and input to the first transmission shaft 52, and the box application agent spraying device 4 is driven by the driving force output from the second transmission shaft 58.

  Thereby, the box application agent spreading device 4 can be moved in a plane via the first rotation shaft 51 and the second rotation shaft 57. Therefore, the entire box application agent spraying device 4 can be separated from the vehicle body 2. Further, since the first transmission shaft 52 and the second transmission shaft 58 of the transmission mechanism are provided so as to coincide with the rotation shafts 51 and 57, when the main frame 6 is moved around the rotation shafts 51 and 57, There is no need to remove the first transmission shaft 52 and the second transmission shaft 58. As a result, the operation of separating and returning the box application agent spraying device 4 from the vehicle body 2 becomes extremely simple.

  Further, in the rice transplanter 1 of the present embodiment, the bevel gear 35 provided on the first transmission shaft 52 and the bevel gear 37 provided on the intermediate shaft 41 are engaged with each other. A bevel gear 54 provided on the intermediate shaft 41 and a bevel gear 55 provided on the second transmission shaft 58 are engaged with each other.

  Thereby, a driving force can be transmitted with a simple configuration between the first transmission shaft 52 and the second transmission shaft 58 arranged in parallel to each other.

  In the rice transplanter 1 of the present embodiment, the intermediate frame 38 is configured as a hollow member. The intermediate shaft 41 is rotatably disposed inside the intermediate frame 38.

  As a result, the drive transmission path between the first transmission shaft 52 and the second transmission shaft 58 is disposed inside the intermediate frame 38, and thus compactness is possible. Further, since the drive transmission path in the intermediate frame 38 moves integrally with the rotation of the intermediate frame 38, the operator is driven during the work of separating and returning the box application agent spraying device 4 from the vehicle body 2. There is no need to worry about interference with members.

  Moreover, in the rice transplanter 1 of this embodiment, the 1st transmission shaft 52, the intermediate shaft 41, and the 2nd transmission shaft 58 are mechanically connected. The intermediate frame 38 and the main frame 6 can be rotated while the mechanical connection is maintained.

  This eliminates the need to separate the drive transmission path from the first transmission shaft 52 to the second transmission shaft 58 via the intermediate shaft 41 when the box application agent spraying device 4 is separated from or returned to the vehicle body 2. Therefore, the work becomes easier.

  Moreover, the rice transplanter 1 according to the present embodiment includes a seeding stage 39 on which seedlings are placed and a planting unit 3 for planting the seedlings on the ground. The box application agent spraying device 4 sprays the medicine onto the seedlings on the seedling mount 39. The power of the planting part 3 is taken out and transmitted to the first transmission shaft 52.

  Thereby, since the box application agent spreading | diffusion apparatus 4 can be driven using the motive power of the planting part 3, the compactization of a structure is realizable.

  Further, the rice transplanter 1 of the present embodiment is connected to the crank 62 to which the driving force of the second transmission shaft 58 is transmitted and the output shaft 63 of the crank 62 to transmit the driving force to the box application agent spraying device 4. A rod 64 is provided. The rotation axis of the crank 62 is disposed so as to coincide with the second rotation shaft 57.

  Thereby, a driving force can be transmitted to the box application agent spreading device 4 and driven by the transmission mechanism. In addition, since the crank 62 rotates on the same axis as the second rotation shaft 57, it is not necessary to remove the connecting rod 64 when the main frame 6 is rotated around the second rotation shaft 57. As a result, the box application agent spraying device 4 can be easily moved around the rotation shaft 57.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  In the said embodiment, although it was set as the structure which supported two types of spraying apparatuses called the box application agent spraying apparatus 4 and the herbicide spraying apparatus 5 on the main frame 6, there is one kind of spraying apparatus supported on the main frame 6. Alternatively, three or more types of spraying devices can be supported on the main frame 6.

  In the above embodiment, the support case 33 is fixed to the rightmost planting case 32, but may be modified to be fixed to the leftmost planting case 32.

  In the above-described embodiment, the driving force is transmitted from the one-way clutch 68 via a plurality of gears and clutches to each spraying unit 44 of the box application agent spraying device 4. It is not limited and can be changed as appropriate.

  For example, in the above-described embodiment, a biasing member (not shown) that biases the unit side clutch member 49 toward the frame side clutch member 76 is provided in the feeding drive shaft 48. In this configuration, Since the load in the thrust direction is applied to the feeding drive shaft 48 by the biasing force of the biasing member, the feeding roll 25 may not be driven smoothly. Therefore, the urging member on the unit side clutch member 49 side may be omitted, and instead, the urging member may be provided on the frame side clutch member 76 side.

  In the above embodiment, the intermediate transmission member is the intermediate shaft 41, but is not limited thereto. The intermediate transmission member may be configured to be able to transmit a driving force between the first transmission shaft 52 and the second transmission shaft 58. For example, the intermediate transmission member can be an endless annular chain.

  The spraying device is not limited to a chemical spraying device, and may be any device that sprays granular solids such as seeds.

  The configuration of the present invention is not limited to rice transplanters, and can be widely applied to work vehicles that disperse granular solids.

1 Rice transplanter (dispersion work vehicle)
2 Car body 3 Planting part 4 Box application agent spraying device (spraying device)
5 Herbicide spraying device (second spraying device)
6 Main frame 33 Support case (support part)
35, 37 Bevel gear 38 Intermediate frame 39 Seed base 41 Intermediate shaft (intermediate transmission member)
51 First rotating shaft 52 First transmission shaft 54,55 Bevel gear 57 Second rotating shaft 58 Second transmission shaft 62 Crank 64 Connecting rod

Claims (6)

A vehicle body that can travel,
A spraying device;
A main frame supporting the spraying device;
An intermediate frame that supports the main frame;
A support portion for supporting the intermediate frame;
With
The intermediate frame is supported so as to be rotatable relative to the support portion around a first rotation axis.
The main frame is supported so as to be rotatable relative to the intermediate frame around a second rotation axis that is different in axis from the first rotation axis and is substantially parallel to the first rotation axis.
A first transmission shaft arranged with its axis aligned with the first rotation shaft;
A second transmission shaft disposed so that its axis coincides with the second rotation shaft;
An intermediate transmission member for transmitting a driving force from the first transmission shaft to the second transmission shaft;
Comprising a transmission mechanism comprising
A scattering work vehicle, wherein a driving force input to the first transmission shaft is output from the second transmission shaft, and the spraying device is driven by the driving force. A scattering work vehicle according to claim 1,
A bevel gear provided on the first transmission shaft and a bevel gear provided on the intermediate transmission member mesh with each other;
A spray work vehicle, wherein a bevel gear provided on the intermediate transmission member and a bevel gear provided on the second transmission shaft are meshed with each other. A scattering work vehicle according to claim 1 or 2,
The intermediate frame is configured as a hollow member,
The scattering work vehicle, wherein the intermediate transmission member is rotatably disposed inside the intermediate frame. A scattering work vehicle according to any one of claims 1 to 3,
The first transmission shaft, the intermediate transmission member, and the second transmission shaft are mechanically coupled;
A scattering work vehicle configured to be capable of rotating the intermediate frame and the main frame in a state where the mechanical connection is maintained. A scattering work vehicle according to any one of claims 1 to 4,
A planting part for planting the seedlings on the ground and having a seedling stage on which seedlings are placed;
The spraying device sprays the drug on the seedlings on the seedling stage,
A spray work vehicle, wherein power of the planting part is taken out and transmitted to the first transmission shaft. A scattering work vehicle according to any one of claims 1 to 5,
A crank to which the driving force of the second transmission shaft is transmitted;
A connecting rod connected to the output shaft of the crank and transmitting a driving force to the spraying device;
With
The scattering work vehicle, wherein a rotation axis of the crank is arranged so as to coincide with the second rotation axis.

Images