JP2011062183A - Solid body applicator and working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid body applicator that achieves a mechanism for transmitting a driving force to a plurality of feed parts by a simple constitution. <P>SOLUTION: The applicator for a box application agent is equipped with a plurality of application units 44, a link mechanism 91, a driving force distribution mechanism 92 and unit clutches 78 corresponding to each of the application units 44. Each of the application units 44 is equipped with a hopper, a feed part for feeding a chemical in the hopper and a feed drive shaft 48 for rotating and driving the feed part. Each of the application units 44 is equipped with the two feed parts. The link mechanism 91 transmits a driving force from a plant case of a rice transplanter to the driving force distribution mechanism 92. The driving force distribution mechanism 92 distributes driving force input from the link mechanism 91 to each of the unit clutches 78. Each of the unit clutches 78 is connected and disconnected between the feed drive shaft 48 mounted on the corresponding application unit 44 and the driving force distribution mechanism 92. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention mainly relates to a configuration of a drive transmission mechanism for transmitting a driving force to a plurality of feeding portions in a solid body sprayer that sprays a solid body.

  Conventionally, a solid material spreader mounted on a work vehicle has been known. The solid material spreader is configured to feed the solid material in the hopper by a feeding unit and spray it at a predetermined spraying speed. Examples of such a solid material spreader include a box application spreader and a fertilizer spreader mounted on a rice transplanter. The fertilizer as described above is described in, for example, Patent Document 1, and the box application agent spreader is described in, for example, Patent Document 2.

  The solid material spreader as described above is generally configured to include a plurality of feeding units and a drive transmission mechanism that transmits a driving force to each feeding unit. Moreover, in the solid body spreader provided with the several delivery part as mentioned above, it is comprised so that a drive can be stopped only about a part delivery part among several delivery parts. In addition, as disclosed in Patent Documents 1 and 2, in particular, the rice transplanter is configured to stop the driving of the feeding portion corresponding to the operation of the hooking clutch in conjunction with the operation of the stopping clutch. For example, Patent Document 3 discloses the configuration of the streak clutch.

JP 2004-105107 A Japanese Patent Laid-Open No. 2002-253009 JP 2007-236265 A

  As described above, the solid material spreader needs to be configured so that the driving force to some of the feeding units can be cut while transmitting the driving force to the plurality of feeding units. Therefore, the conventional solid material spreader has a problem that the configuration of the drive transmission mechanism tends to be complicated.

  For example, since Patent Document 1 has a configuration in which all the feeding units are driven by one feeding shaft, in order to realize a configuration in which the driving of only a part of the feeding units is stopped, between each feeding unit and the feeding shaft. It is necessary to provide a clutch. Therefore, the configuration of Patent Document 1 has a problem that the number of clutches is increased, the number of parts is increased, and the cost is increased. On the other hand, Patent Document 2 has a configuration in which a plurality of feed drive shafts are provided and each feed drive shaft is individually driven by a link mechanism. In the case of this configuration, the driving of the corresponding feeding drive shaft can be stopped by individually stopping the driving of the link mechanism, so that it is not necessary to provide a clutch for stopping only a part of the feeding portions. However, since a plurality of link mechanisms are required corresponding to a plurality of feeding drive shafts, the number of parts is increased, which causes an increase in cost.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a solid material spreader that realizes a mechanism for transmitting a driving force to a plurality of feeding portions with a simple configuration. is there.

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 the 1st viewpoint of this invention, it is a solid body spreading machine mounted in a working vehicle, Comprising: The solid body spreading machine comprised as follows is provided. In other words, the solid material sprayer includes a plurality of spraying units, a link portion, a driving force distribution mechanism, and unit clutches provided corresponding to the spraying units. Each of the spraying units includes a hopper, a feeding unit that feeds out the medicine in the hopper, and a drive shaft for rotationally driving the feeding unit. One hopper and one drive shaft are provided for each spraying unit. Further, at least one of the plurality of spraying units is provided with two feeding sections. The link portion transmits a driving force from the work vehicle to the driving force distribution mechanism. The driving force distribution mechanism distributes the driving force input from the link portion to the unit clutches. Each of the unit clutches can be switched between connection and disconnection between the drive shaft included in the corresponding spraying unit and the drive force distribution mechanism.

  Thus, by providing a unit clutch corresponding to each spraying unit, the presence or absence of driving of the feeding unit can be switched as needed for each spraying unit. Therefore, it is possible to prevent unnecessary solid bodies from being scattered. Further, even when the spraying unit has two feeding parts, the two feeding parts are driven by one drive shaft, and therefore a unit clutch for switching the driving of the two feeding parts. One is enough. Therefore, the spray unit can be configured at low cost, and the configuration for operating the clutch can be simplified.

  The solid material spreader is preferably configured as follows. That is, the driving force distribution mechanism includes an input side drive transmission shaft (reference numeral 72 in FIG. 7), a plurality of first drive transmission gears (reference numeral 73 in FIG. 7), and a plurality of second drive transmission gears (in FIG. 7). Reference numeral 74) and a plurality of output side drive transmission shafts (reference numeral 75 in FIG. 7). The input side drive transmission shaft is rotationally driven by the driving force transmitted by the link part. The plurality of first drive transmission gears are fixed to the input side drive transmission shaft. Each of the plurality of second drive transmission gears is arranged corresponding to the first drive transmission gear. Each of the plurality of output side drive transmission shafts is fixed to the second drive transmission gear. Each of the first drive transmission gears and the corresponding second drive transmission gear mesh with each other directly or indirectly, so that the driving force from the input-side drive transmission shaft is transmitted to each of the output-side drive transmissions. Distributed to the axis. The unit clutch is disposed at at least one of both end portions of the second drive transmission shaft.

  Thereby, the driving force transmitted by one link part can be distributed to each unit clutch, and the feeding part of a some spraying unit can be driven. Thus, since only one link portion is required, the driving force can be transmitted with a simple configuration. In addition, since the driving force can be transmitted to the driving shafts of the respective spraying units after branching the driving force to the plurality of second drive transmission shafts via the drive transmission gear, the degree of freedom of the layout of the spraying units Can be increased.

  The solid material spreader is preferably configured as follows. That is, the work vehicle is a rice transplanter provided with a plurality of planting cases, and the unit clutch is provided corresponding to the plurality of planting cases. And a solid object spreading machine is provided with the clutch interlocking mechanism which can interlock the line stop clutch provided in each of these planting cases, and the unit clutch corresponding to the position of the said planting case.

  Thereby, the presence or absence of the drive of the feeding part of a spraying unit can be switched according to the stopping clutch operation of a rice transplanter. And since the unit clutch is provided corresponding to the planting case, when the streak is performed with the rice transplanter, the spray corresponding to the streaked strip (the strip that has not been planted) is linked to this. The feeding section of the unit is not driven. Thereby, it can prevent that a solid body is consumed wastefully.

  According to the 2nd viewpoint of this invention, the working vehicle carrying said solid body spreader is provided.

  In this work vehicle, by providing a unit clutch corresponding to each spraying unit, it is possible to switch the driving of the feeding unit for each spraying unit as necessary. Therefore, it is possible to prevent unnecessary solid bodies from being scattered. Further, even when the spraying unit has two feeding parts, the two feeding parts are driven by one drive shaft, and therefore a unit clutch for switching the driving of the two feeding parts. One is enough. Therefore, the spray unit can be configured at low cost, and the configuration for operating the clutch can be simplified.

The side view which shows the whole structure of the rice transplanter which concerns on one Embodiment of this invention. The rear view which shows the structure of a planting part and a box application agent spreading machine. Plan sectional drawing which shows the mode inside a planting case. The typical side view of a planting case. The rear view of a spraying unit. Side surface sectional drawing of a spraying unit. The schematic diagram of a drive transmission mechanism. The perspective view explaining a drive transmission mechanism. The perspective view which expands and shows the structure of a unit clutch vicinity. The perspective view which shows the support frame of the state which removed the spraying unit. The perspective view of a spraying unit. The perspective view of the spraying unit seen from the angle different from FIG. The rear view which shows the structure of the fertilizer applicator which concerns on a modification. The side view which shows the structure of the fertilizer applicator which concerns on a modification.

  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 13, and is configured as a riding type rice transplanter (transplanter).

  A steering handle 14 is disposed in front of the driver seat 13, and pedals such as a brake pedal 15 are disposed at the feet of the driver seat 13. Various operation levers such as a bar stop lever 16 are disposed in the vicinity of the driver seat 13.

  Further, the rice transplanter 1 includes a fertilizer application device 20 disposed immediately behind the driver seat 13, a planting unit 30 disposed behind the vehicle body 2, and a box application agent spreader 40 attached to the planting unit 30. And.

  The fertilizer application device 20 includes a fertilizer hopper 21, a fertilizer feeding unit 22, a blower not shown, and a fertilizer transport hose 23. The fertilizer feeding unit 22 is configured to feed the fertilizer in the fertilizer hopper 21 by a predetermined amount by being driven appropriately. The fertilizer fed from the fertilizer feed unit 22 is transported through the fertilizer transport hose 23 by the air flow generated by the blower, and is supplied to the grooving device 38 described later.

  The planting part 30 includes a planting case 32 connected to the rear part of the vehicle body 2 via an elevating link mechanism 31. The elevating link mechanism 31 has a parallel link structure including a top link 33, a lower link 34, and the like. The elevating link mechanism 31 is driven up and down by driving an unillustrated elevating cylinder connected to the lower link 34. It is configured to be possible.

  As shown in FIG. 2, in the planting part 30 with which the rice transplanter 1 of this embodiment is provided, a total of four planting cases 32 are arrange | positioned, and the planting unit 36 is respectively on the left and right of each planting case 32. Are arranged one by one. Therefore, the rice transplanter 1 of this embodiment is configured as a rice transplanter for 8 articles.

  Each planting unit 36 is configured as a rotary planting device provided with two planting claws 36b on a rotating case 36a. Since the configuration of the rotary planting device is well known, detailed description is omitted, but by rotating the rotary case 36a, the tip of the planting claw 36b is driven up and down while drawing a predetermined locus. It is configured. When the tip of the planting claw 36b moves from top to bottom, one seedling is scraped off from the lower end of a seedling mat placed on a seedling mount 39 described later, and the root of the seedling is held. It is configured to move downward and plant on the ground.

  As shown in FIG. 1, the planting unit 30 includes a float 37, a grooving device 38, and a seedling mount 39.

  The float 37 is provided symmetrically in the lower part of the planting part 30. Thereby, it is comprised so that the right and left balance of the planting part 30 can be kept favorable and the planting posture can be stabilized and accurate planting can be performed. The groove generator 38 is provided adjacent to the float 37. The grooving device 38 enters the mud layer downward from the ground contact surface, and forms a groove for supplying fertilizer, while supplying the fertilizer supplied from the fertilizer application device 20 through the fertilizer transport hose 23 to the mud layer. It is configured to fertilize.

  The seedling mount 39 is disposed above the planting case 32. Since the rice transplanter 1 according to the present embodiment is for eight strips, the seedling mount 39 is configured so that eight strips of seedling mats can be placed side by side in the vehicle body width direction (see FIG. 2).

  The seedling stage 39 is supported on a guide rail (not shown) so as to be slidable back and forth in the left-right direction of the vehicle body. And the planting part 30 is provided with the horizontal feed mechanism of the omission of illustration which reciprocates the seedling mounting stand 39 right and left within the range of the left-right width of a seedling mat. Thereby, the seedling mat placed on the seedling placing stand 39 can be moved relative to the planting unit 36 from side to side. The seedling mounting table 39 includes a seedling feeding belt (vertical feeding mechanism) that intermittently feeds the seedling mat downward (that is, toward the planting unit 36). With the above configuration, by appropriately interlocking the horizontal feed mechanism and the vertical feed mechanism, seedlings can be sequentially supplied to the planting units 36 and planted continuously.

  A box application spreader 40 is disposed above the planting case 32. The configuration of the box application agent spreader 40 will be described in detail later. Briefly, the box application agent in the hopper 45 is fed out by the feeding portion 46, and the surface of the seedling mat is fed from the pipe-shaped shooter (medicine guide member) 47. It is sprayed on the root of the seedling. As shown in FIG. 2, the feeding portion 46 and the shooter 47 are provided for each strip. The box application agent spreader 40 is fixed to the planting case 32. Therefore, the shooter 47 moves relative to the seedling mat by the lateral feed mechanism and the vertical feed mechanism, so that the box application agent can be uniformly distributed on the seedling mat.

  Next, the structure of the anchoring clutch of the planting part 30 is demonstrated. The streak clutch is a clutch mechanism provided in each planting case 32, and is configured so that the planting unit 36 can be switched for each planting case 32. Thereby, planting can be partially stopped as needed.

  The streak clutch can be switched by operating the stapling lever 16. A total of four stapling levers 16 are provided corresponding to each planting case 32, and each can be operated independently.

  Next, the configuration of the hooking clutch will be specifically described with reference to FIG. As shown in FIG. 3, in each planting case 32, a drive transmission shaft 50 for transmitting a rotational driving force from a PTO shaft (not shown) provided in the vehicle body 2 is arranged. A first bevel gear 51 is fixed to the rear end of the drive transmission shaft 50.

  In each planting case 32, a planting unit drive shaft 52 is disposed along the left-right direction of the vehicle body. Both ends of the planting unit drive shaft 52 protrude outward from the left and right sides of the planting case 32, and a rotating case 36a is attached to each of the both ends.

  Further, in each planting case 32, a first clutch member 53 that is spline-fitted to the planting unit drive shaft 52, and a second clutch member that is supported so as to be rotatable relative to the planting unit drive shaft 52 are provided. 54 are arranged.

  Clutch claws are formed on the first clutch member 53 and the second clutch member 54, respectively, and the clutch claws face each other in the axial direction of the planting unit drive shaft 52. The clutch pawls of the first clutch member 53 and the second clutch member 54 can be engaged with each other. That is, the first clutch member 53 and the second clutch member 54 constitute a meshing clutch (strip stop clutch).

  The first clutch member 53 is attached so as not to rotate relative to the planting unit drive shaft 52 by the spline fitting. On the other hand, a second bevel gear 55 is formed on the second clutch member 54, and the second bevel gear 55 is engaged with the first bevel gear 51. With the above configuration, when the first clutch member 53 and the second clutch member 54 are engaged with each other (clutch “ON” state), the driving force of the drive transmission shaft 50 is transmitted to the planting unit drive shaft 52. Thus, the planting units 36 (for two strips) on the left and right of the planting case 32 can be driven.

  On the other hand, since the first clutch member 53 is spline-fitted with the planting unit drive shaft 52, the first clutch member 53 can move in a direction away from the second clutch member 54 (that is, a direction in which the engagement of the clutch pawl is released). It is. As a result, the driving of the planting units 36 on the left and right of the planting case 32 (for two strips) can be stopped with the clutch in the “disengaged” state. The first clutch member 53 is biased by a biasing spring 56 in a direction to engage with the second clutch member 54. Therefore, in a normal state, the first clutch member 53 and the second clutch member 54 are held in a meshed state (clutch “ON” state).

  Next, a configuration for enabling the clutch configured as described above to be operated by the stop lever 16 will be described with reference to FIG. As shown in FIG. 4, a clutch lever 58 formed in an L shape is attached to the outside of each planting case 32 with its intermediate portion rotatably supported by a stop pin 59. A wire 60 is connected to one end of the clutch lever, and the wire 60 is connected to the above-described stapling lever 16. With this configuration, the clutch lever 58 can be rotated around the position of the stop pin 59 by operating the bar stop lever 16.

  Further, one end of a clutch operation pin 57 is attached to the other end of the clutch lever 58. The other end of the clutch operation pin 57 is inserted in the planting case 32. With this configuration, the clutch operating pin 57 can be pushed into the planting case 32 by operating the stapling lever 16. On the other hand, as shown in FIG. 3, the first clutch member 53 has a cam portion 53a. When the clutch operating pin 57 is pushed into the planting case 32, the tip of the clutch operating pin 57 comes into contact with the cam portion 53a and moves the first clutch member 53 away from the second clutch member 54 ( It is configured to be able to move in the direction of the clutch “disengaged” state.

  As described above, by operating the stapling lever 16, the corresponding stapling clutch of the planting case 32 is disconnected, and the driving of the two planting units 36 provided in the planting case 32 is stopped, It is configured so that planting can be partially stopped.

  Next, the box application agent spreader 40 will be described in detail. As shown in FIG. 2, the box application agent spreader 40 includes a support frame 43 and a plurality of spray units 44 supported by the support frame 43.

  As shown in FIG. 2, the support frame 43 includes a vertical frame 41 fixed in the upper part of each planting case 32, and a horizontal frame supported on the upper end of the vertical frame 41 and arranged in the left-right direction of the vehicle body. 42.

  As shown in FIG. 1, the spraying unit 44 is disposed on the rear upper side of the seedling stage 39. As shown in FIG. 2, the plurality of spraying units 44 are supported by the support frame 43 in a state where they are arranged in the left-right direction of the vehicle body. Further, the spraying unit 44 is provided corresponding to the planting case 32. Therefore, the box application agent spreader 40 of this embodiment includes four spraying units 44. As shown in FIG. 2, there are two types of spraying unit 44, spraying unit 44 </ b> R and spraying unit 44 </ b> L, both of which have almost the same configuration except that the position of unit-side clutch member 49 (described later) is different. Therefore, in the present specification, the spraying unit 44L is illustrated and described exclusively.

  As shown in FIG. 5, each spray unit 44 includes a hopper 45, a feeding portion 46, a shooter 47, a feeding drive shaft (drive shaft) 48, a round bar member 27, a plate member 28, and a unit side. The clutch operating lever 80 is integrally configured. Each spraying unit 44 is configured to be removable from the support frame 43 together with the spraying unit 44.

  The hopper 45 is a container for containing a box application agent. The hopper 45 is formed with an opening at its upper end, and includes a lid 45b that closes the opening. By opening the lid 45b, the box application agent can be replenished into the hopper 45, or the remaining box application agent can be confirmed by looking into the hopper 45. The box application agent is assumed to be fine (not liquid). Therefore, it can also be said that the box application agent spreader 40 of this embodiment is a solid body spreader.

  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 the tip thereof is located near the surface of the seedling mat (the seedling root). The tip portion of the shooter 47 has a role of scraping seedlings of the seedling mat that moves relative to each other by the vertical feed mechanism and the lateral feed mechanism, a role of guiding the box application agent falling from the feeding portion 46 to the surface of the seedling mat, Doubles as Thereby, a box application agent can be appropriately sprayed on the base of a seedling.

  As shown in FIG. 5, each spray unit 44 includes two feeding portions 46 and two shooters 47. This configuration corresponds to each planting case 32 having two planting units 36. Further, the two feeding portions are arranged with an interval therebetween, and the interval substantially coincides with the inter-strip pitch. In order to supply the box application agent to the two feeding portions 46, the left and right widths of the hopper 45 are formed to be slightly longer than the inter-strip pitch. The lower portion of the hopper 45 is divided into two forks, and communication portions 45 a communicating with the feeding portion 46 are formed at the lower ends of the divided portions.

  Moreover, as shown in FIG. 2, as for the four spreading | diffusion units 44 with which the box application agent spreading device 40 of this embodiment is provided, the space | interval of the feeding parts 46 with which the adjacent spreading | diffusion unit 44 is provided substantially corresponds with the pitch between stripes. Is arranged. In other words, when viewed as a whole of the box application agent spreader 40, the feeding portion 46 is provided for each strip, and the spacing between the feeding portions 46 is substantially the same as the pitch between the strips.

  Here, if the number of feeding portions 46 is smaller than the number of strips, the box application agent must be supplied from one feeding portion 46 to a plurality of seedling mats. 47 becomes long. In this regard, the length of the shooter 47 can be shortened by adopting a configuration in which the feeding portion 46 is provided for each strip as described above. Even if the number of the feeding portions 46 matches the number of strips, the distance from each feeding portion 46 to the seedling mat becomes long when the spacing between the feeding portions 46 does not match the pitch between the strips. End up. Therefore, as described above, the spacing between the feeding portions 46 is substantially matched with the inter-strip pitch.

  Then, by configuring the shooter 47 to be short, the shooter 47 can be prevented from being clogged with the box application agent. Further, since the shooter 47 can be shortened, the position of the feeding portion 46 can be brought close to the seedling mat, and the entire spray unit 44 can be arranged at a low position. Thereby, not only the replenishment operation of the box application agent to the hopper 45 can be easily performed, but also the weight balance of the whole rice transplanter 1 can be improved by lowering the center of gravity.

  Further, as shown in FIG. 2, in the state where each spraying unit 44 is mounted on the support frame 43, the distance between the hoppers 45 is increased to some extent. Therefore, it is easy for the operator to insert a hand from between the hoppers 45 to remove the seedling mat remaining on the seedling mount 39.

  Next, with reference to FIG. 6, the configuration of the feeding portion 46 will be described in detail. The feeding portion 46 includes a feeding case 24, a feeding roll 25, and a brush 26.

  The feeding case 24 is attached to the lower part of the two communicating portions 45a formed in the hopper 45, respectively. A feeding roll 25 is disposed inside a space formed by the feeding case 24 and the communication portion 45a. The feeding roll 25 is formed in a thick disk shape, and a plurality of concave portions 25a are formed at predetermined intervals on the outer peripheral surface thereof. As described above, the granular box application agent in the hopper 45 can be dropped into the recesses 25a by a certain amount. Then, by rotating the feeding roll 25 at a predetermined speed, the feeding roll 25 functions like a water wheel so that the box application agent in the hopper 45 can be fed toward the shooter 47 at a predetermined supply speed. it can.

  The brush 26 is disposed so as to contact the outer peripheral surface of the feeding roll 25. The brush 26 is used to block the box application agent so that the box application agent in the hopper 45 does not flow downward through the gap between the supply roll 25 and the supply case 24.

  Two feeding rolls 25 provided in the spreading unit 44 are fixed to the feeding drive shaft 48 provided in each spreading unit 44. Further, as shown in FIG. 5, a unit side clutch member 49 is attached to one end of the feeding drive shaft 48. The unit-side clutch member 49 is provided on the left side in the traveling direction, which is the spreading unit 44R, and the right side is the spreading unit 44L.

  The unit side clutch member 49 is formed with a clutch pawl. Then, when the unit side clutch member 49 is engaged with a frame side clutch member 76 which will be described later and the rotational driving force is input to the feeding drive shaft 48, the two feeding rolls 25 (for two strips) provided in the spraying unit 44 are provided. At the same time, the box application agent in the hopper 45 is fed out by being driven to rotate.

  Further, the round bar member 27 and the plate-like member 28 are members for abutting the mounting stay 87 provided in the support frame 43 to support the posture of the spray unit 44 itself when the spray unit 44 is put on the support frame 43. It is. The configuration of the mounting stay 87 will be described later.

  Next, the structure for transmitting the driving force from the planting case 32 to the feeding drive shaft 48 provided in each spraying unit 44 will be described.

  First, the structure for taking out driving force from the planting case 32 is demonstrated. Any one of the four planting cases 32 arranged has a rear end portion opened and a drive take-out case 61 attached to the rear end portion. In the case of this embodiment, as shown in FIG. 2, the drive extraction case 61 is attached to the rear end part of the second planting case 32 from the left. The inside of the drive take-out case 61 is shown in FIG. That is, FIG. 3 shows the second planting case 32 from the left.

  As shown in FIG. 3, a spreader PTO shaft 62 is disposed inside the drive take-out case 61. A third bevel gear 63 that meshes with the second bevel gear 55 is fixed to one end of the PTO shaft 62 for the spreader, and a drive gear 64 is fixed to the other end. On the other hand, a drive take-out shaft 65 is rotatably supported by the drive take-out case 61, and a driven gear (not shown) that meshes with the drive gear 64 is fixed to the front end of the drive take-out shaft 65, and the rear end is driven. It protrudes rearward from the take-out case 61. With the above configuration, the rotational driving force can be taken out from the rear of the planting case 32.

  Next, a drive transmission mechanism for transmitting the rotational driving force taken out from the planting case 32 to each spraying unit 44 will be described. The support frame 43 is provided with a link mechanism (link part) 91 that transmits a driving force from the planting unit 30, a one-way clutch mechanism 70, and a driving force distribution mechanism 92.

  As shown in FIGS. 7 and 8, the link mechanism 91 includes a crank plate 66 attached to the rear end of the drive extraction shaft 65, a vertical link member 67 having one end connected to the crank plate 66, and a vertical link member. And a first drive transmission lever 68 coupled to the other end of 67. The rotational motion taken out from the planting case 32 by the drive take-out shaft 65 is converted into a vertical reciprocating motion by the crank plate 66 and the vertical link member 67 and transmitted to the first drive transmission lever 68.

  The first drive transmission lever 68 is rotatably attached to a first drive transmission shaft 72 described later. With this configuration, the vertical reciprocating motion of the vertical link member 67 is converted into a reciprocating rotational motion about the axis of the first drive transmission shaft 72 by the first drive transmission lever 68.

  The one-way clutch mechanism 70 includes a second drive transmission lever 69 rotatably attached to the first drive transmission shaft 72, and only when the second drive transmission lever 69 rotates in one direction. The driving force is transmitted to the first drive transmission shaft 72. The second drive transmission lever 69 is configured to be in contact with the first drive transmission lever 68. Thereby, the reciprocating rotational motion by the first drive transmission lever 68 is transmitted to the second drive transmission lever 69, and only the rotational driving force in one direction is transmitted to the first drive transmission shaft 72 by the one-way clutch mechanism 70. .

  With the configuration described above, the driving force extracted from the planting unit 30 can be transmitted to the first drive transmission shaft 72, and the first drive transmission shaft 72 can be intermittently rotated in one direction.

  Next, the driving force distribution mechanism 92 will be described. The driving force distribution mechanism 92 includes a first drive transmission shaft (input-side drive transmission shaft) 72, a first drive transmission gear 73, a second drive transmission gear 74, and a second drive transmission shaft (output-side drive transmission shaft). ) 75 and a frame side clutch member 76.

  As shown in FIGS. 2 and 7, the first drive transmission shaft 72 is disposed in the direction in which the scattering units 44 are arranged (the vehicle body left-right direction). Further, as shown in FIG. 7, first drive transmission gears 73 are respectively fixed to both ends of the first drive transmission shaft 72. Accordingly, the box application agent spreader 40 of this embodiment includes two first drive transmission gears 73. As shown in FIG. 7, a second drive transmission gear 74 that meshes with the first drive transmission gear is provided corresponding to each of the two first drive transmission gears 73. Therefore, the box application agent spreader 40 of this embodiment includes two second drive transmission gears 74. The first drive transmission gear 73 and the second drive transmission gear 74 are accommodated in a gear case 77. In FIG. 8, in order to better illustrate the configuration of the first drive transmission gear 73 and the second drive transmission gear 74, the upper portion of the gear case 77 is depicted in perspective with a chain line.

  As shown in FIG. 7, the two second drive transmission gears 74 are respectively fixed to the central portion in the axial direction of the second drive transmission shaft 75 arranged corresponding thereto. Therefore, the box application agent spreader 40 of this embodiment includes two second drive transmission shafts. The second drive transmission shaft 75 is disposed in parallel with the first drive transmission shaft 72. Frame-side clutch members 76 are attached to both ends of each second drive transmission shaft 75. That is, the box application agent spreader 40 of this embodiment includes four frame side clutch members 76. Further, the four frame side clutch members 76 are arranged at positions corresponding to the attachment positions of the four spraying units 44.

  A clutch pawl is formed on the frame side clutch member 76. When the spray unit 44 is attached to the support frame, the clutch pawls formed on the frame side clutch member 76 and the clutch pawls formed on the unit side clutch member 49 are arranged so as to face each other in the left-right direction of the vehicle body. Has been. The clutch claws formed on the two clutch members 49 and 76 are configured to be able to engage with each other. That is, a unit clutch (meshing clutch) 78 is configured by the frame side clutch member 76 and the unit side clutch member 49. As shown in FIG. 7, it can be said that the unit clutch 78 is arranged for each spraying unit 44.

  With the above configuration, the driving force taken out from one planting case 32 is transmitted via one link mechanism 91 and one one-way clutch mechanism 70, and is driven by the driving force distribution mechanism 92 to the four unit clutches 78. Can be distributed. As described above, since one link mechanism 91 and one one-way clutch mechanism 70 are required, the drive transmission mechanism can have a simple configuration. Then, by setting the unit clutch 78 to the “ON” state (a state where the unit side clutch member 49 and the frame side clutch member 76 are engaged with each other), the driving force is transmitted to the feeding drive shaft 48 of each spraying unit 44, The feeding roll 25 of each spraying unit 44 can be rotationally driven.

  When the clutch is configured as a meshing clutch and the clutch member is arranged at the end of the drive transmission shaft, only one clutch transmission member can be arranged on one drive transmission shaft. That is, the driving force can be distributed only to the two spraying units. In this regard, in the above configuration, the driving force is branched from the first drive transmission shaft 72 to the plurality of second drive transmission shafts 75 via the drive transmission gears 73 and 74. Therefore, by attaching the frame side clutch members 76 to both ends of the plurality of second drive transmission shafts 75, the driving force can be distributed to the three or more spraying units 44. Further, another drive transmission gear may be provided between the drive transmission gears 73 and 74 (that is, the drive transmission gears 73 and 74 may be engaged with each other indirectly). Thereby, the second drive transmission shaft 75 can be arranged relatively freely, and the degree of freedom of the arrangement layout of the spray unit 44 can be increased.

  Moreover, as above-mentioned, in this embodiment, it is possible to arrange | position each spreading | diffusion unit 44 to a low position (closer to the planting case 32) by providing the delivery part 46 for every strip | growth. Therefore, the vertical link member 67 can be configured to be short, and the link mechanism 91 can be configured simply.

  Next, the structure of the unit clutch 78 will be described in detail. As shown in FIG. 9, the unit-side clutch member 49 is biased by a biasing spring 79 in a direction to engage with the frame-side clutch member 76. That is, the unit clutch 78 is held in the “on” state by the urging force of the urging spring 79.

  Next, a configuration of a clutch interlocking mechanism for switching the unit clutch 78 to the “OFF” state in conjunction with the tie stop clutch will be described.

  As shown in FIG. 10, a frame side clutch operation lever 85 is rotatably supported on the horizontal frame 42. The frame side clutch operation lever 85 is provided corresponding to the four spreading units 44. Accordingly, the frame 42 according to this embodiment is provided with four frame side clutch operation levers 85. Further, one end of a clutch operating force transmission wire 86 is connected to each frame side clutch operating lever 85. And the other end of each clutch operation force transmission wire 86 is connected with the clutch operation pin 57 with which the corresponding planting case 32 is provided, as shown in FIG. With this configuration, the frame side clutch operation lever 85 can be rotated by the displacement of the clutch operation pin 57.

  Here, the “corresponding planting case 32” is the planting case 32 corresponding to the position of the spreading unit 44. For example, the frame-side clutch operation lever 85 provided corresponding to the leftmost spraying unit 44 is connected to the clutch operation pin 57 provided in the leftmost planting case 32 by a clutch operation force transmission wire 86. Further, for example, the frame side clutch operation lever 85 provided corresponding to the second spraying unit 44 from the left is provided by the clutch operation pin 57 provided in the second planting case 32 from the left and the clutch operation force transmission wire 86. It is connected.

  Therefore, when any one of the four anchoring levers 16 is operated and the clutch operation pin 57 of the corresponding planting case 32 is pushed into the planting case 32, the displacement of the clutch operation pin 57 is The clutch operating force transmission wire 86 is transmitted to the corresponding frame side clutch operating lever 85, and the frame side clutch operating lever 85 can be rotated. In other words, it is configured such that the operation of the hooking clutch and the operation of the frame side clutch operation lever 85 can be interlocked.

  On the other hand, as shown in FIGS. 11 and 12, a unit-side clutch operation lever 80 is rotatably attached to the plate-like member 28 of the spraying unit 44. The unit side clutch operation lever 80 includes a clutch member abutting portion 81 and an operation input portion 82.

  The clutch member contact portion 81 is disposed so as to be able to contact a flange portion 49 a formed on the outer periphery of the unit side clutch member 49. The operation input portion 82 is configured as a plate-shaped portion and is fixed to the clutch member abutting portion 81. By pushing the operation input unit 82 in a predetermined direction, the unit side clutch operation lever 80 can be rotated in a predetermined direction. Then, when the unit side clutch operation lever 80 rotates in a predetermined direction, the clutch member contact portion 81 pushes the unit side clutch member 49 and displaces the unit side clutch member 49 in a direction away from the frame side clutch member 76. It is comprised so that it can be made to. As a result, the unit clutch 78 can be set to the “off” state.

  As shown in FIG. 9, when the spraying unit 44 is attached, the operation input portion 82 of the unit-side clutch operation lever 80 and the frame-side clutch operation lever 85 are configured to be close to each other. . When the stapling lever 16 is operated, the corresponding frame side clutch operation lever 85 rotates, and this frame side clutch operation lever 85 contacts the operation input portion 82 of the unit side clutch operation lever 80 that is in proximity. Then, the operation input unit 82 is pushed in a predetermined direction. As a result, the unit side clutch operating lever 80 rotates and the clutch member contact portion 81 pushes the unit side clutch member 49, and the position of the unit side clutch member 49 is displaced in a direction away from the frame side clutch member 76. Thus, the unit clutch 78 is configured to be disconnected. In other words, it is configured such that the striation stopping clutch and the corresponding unit clutch 78 can be interlocked.

  As described above, the streak clutch of the planting case 32 is configured to stop planting every two strips. On the other hand, the spraying unit 44 is configured to drive two (two strips) feeding rolls 25 with one drive shaft. Accordingly, the driving of the two feeding portions 46 (for two strips) can be stopped by one unit clutch 78. Since it is such a structure, it becomes possible to switch the presence or absence of planting and a box application agent for every 2 item | stripes by interlocking a row stopping clutch and a unit clutch. Further, by configuring as described above, the number of parts related to the unit clutch can be reduced as compared with the configuration in which one unit clutch is provided for one feeding portion 46, and the spray unit 44 and the drive transmission mechanism are simplified. Can be configured.

  Next, a configuration for enabling the spraying unit 44 to be detached from the support frame 43 will be described.

  As described above, the unit clutch 78 is configured as a meshing clutch including the unit side clutch member 49 and the frame side clutch member 76. The unit side clutch member 49 can be separated from the frame side clutch member 76. That is, the feeding drive shaft 48 of the spray unit 44 can be separated from the drive transmission mechanism on the support frame 43 side at the unit clutch 78 portion. As described above, since the unit clutch 78 is configured as a meshing clutch, when removing the spraying unit 44 from the support frame 43, it is not necessary to remove a mechanism for transmitting the drive. Easy to remove.

  Further, as described above, the unit side clutch operation lever 80 and the frame side clutch operation lever 85 are merely disposed close to each other (not mechanically coupled). Therefore, the unit side clutch operation lever 80 can be separated from the frame side clutch operation lever 85. Thereby, when removing the spraying unit 44 from the support frame 43, it is not necessary to remove a mechanism (for example, a wire or the like) for transmitting the clutch operating force, so that the spraying unit 44 can be easily removed. .

  In addition, in the conventional box application agent spreader, since the feeding portion could not be easily separated from the drive transmission mechanism on the support frame side, the hopper and the feeding portion could not be removed as a unit. Therefore, in the conventional box application agent spreader, only the hopper can be removed in order to easily discharge the remaining medicine in the hopper. In this configuration, the hopper and the feeding portion cannot be firmly connected, and rainwater may enter through the gap between the hopper and the feeding portion, and the medicine may be melted. Further, since the feeding part cannot be removed from the support frame, the medicine remaining inside the feeding part could not be easily discharged.

  In this regard, in this embodiment, the feeding unit 46 can be easily separated from the drive transmission mechanism on the support frame 43 side by configuring the spray unit and the drive transmission mechanism as described above. Accordingly, the hopper 45, the feeding portion 46, the shooter 47, and the like are integrated together to form the spray unit 44, and the spray unit 44 can be detached from the support frame 43 together.

  Therefore, in the configuration of the present embodiment, in order to discharge the medicine remaining in the hopper 45 and the feeding portion 46, the spraying unit 44 may be removed, the lid 45b may be opened, and the spraying unit 44 may be turned over. Therefore, unlike the conventional box application agent spreader, it is not necessary to configure the hopper 45 so as to be easily separable from the feeding portion 46. Therefore, as shown in FIG. 5 and the like, in this embodiment, the hopper 45 and the feeding case 24 are screwed. Thus, since the hopper 45 and the feeding case 24 can be firmly connected, the sealing performance is improved as compared with the conventional case, and rainwater or the like can hardly enter the inside.

  Next, the structure for fixing each spreading | diffusion unit 44 to the support frame 43 is demonstrated.

  As shown in FIG. 10, on the horizontal frame 42, mounting stays 87 for placing the spraying units 44 are arranged at the mounting positions of the spraying units 44. Each mounting stay 87 is composed of two leg portions 88 provided side by side in the left-right direction of the vehicle body, and a plate-like horizontal portion 89 horizontally provided between the leg portions 88.

  On the other hand, as shown in FIGS. 11 and 12, the round bar member 27 and the plate-like member 28 included in the spraying unit 44 are arranged in the left-right direction of the vehicle body (in a direction parallel to the feeding drive shaft 48). When the spray unit 44 is placed on the mounting stay 87, the round bar member 27 is placed on the leg portion 88, and the plate-like member 28 is placed on the horizontal portion 89. Thus, since the spray unit 44 can be supported by at least three points by the two legs 88 and the horizontal part 89, the posture of the spray unit 44 can be stabilized.

  On the other hand, as shown in FIG. 10, the leg portion 88 is formed with an inclined portion 88a and a U-shaped portion 88b formed continuously at the lower end of the inclined portion 88a. With this configuration, when placing the spraying unit 44 on the mounting stay 87, the spraying unit 44 is moved to slide downward by its own weight while keeping the round bar member 27 in contact with the inclined portion 88a. Then, the round bar member 27 is naturally guided by the inclined part 88a, and the round bar member 27 is fitted inside the U-shaped part 88b, whereby the spraying unit 44 is positioned in the longitudinal direction of the vehicle body. ing. In the state where the spraying unit 44 is positioned in the longitudinal direction of the vehicle body, the clutch members 49 and 76 are configured to face each other.

  Further, the horizontal portion 89 and the plate-like member 28 have a certain length in the left-right direction of the vehicle body. That is, the plate-like member 28 can be placed on the horizontal portion 89 even if the position of the spraying unit 44 is shifted to some extent in the left-right direction of the vehicle body. On the other hand, the interval between the two leg portions 88 is configured to be shorter than the length of the round bar member 27 in the left-right direction of the vehicle body. That is, even if the position of the spray unit 44 is shifted to some extent in the left-right direction of the vehicle body, the round bar member 27 can be placed on the two leg portions 88. Therefore, even if the scattering unit 44 is moved to some extent in the left-right direction of the vehicle body with the round bar member 27 placed on the leg 88 and the plate-like member 28 placed on the horizontal part 89, the two leg parts 88 and the horizontal part 89 are moved. Can stably support the spraying unit 44 at least at three points. That is, the spraying unit 44 can be slid in the left-right direction of the vehicle body (that is, the direction in which the clutch members 49 and 76 are in contact with or separated from each other) while maintaining the posture of the spraying unit 44.

  Therefore, for example, the spreading unit 44 can be stably placed on the mounting stay 87 in a state where the clutch members 49 and 76 are separated from each other. Since the spraying unit 44 can be temporarily placed in this way, the mounting work of the spraying unit 44 can be performed easily. In this temporarily placed state (in which the round bar member 27 is fitted in the U-shaped portion 88b), the spraying unit 44 is positioned in the longitudinal direction of the vehicle body. Thus, the clutch members 49 and 76 can be easily engaged with each other simply by sliding in the left-right direction of the vehicle body.

  Note that the positioning of the spray unit 44 in the left-right direction of the vehicle body is such that the convex portion 89a (see FIG. 10) formed in the horizontal portion 89 is fitted into the hole 28a (see FIG. 12) formed in the plate-like member 28. Can be done. Further, a fixture 90 is disposed in the vicinity of the mounting stay 87 (see FIG. 10). The fixture 90 is configured to be able to hook and fix a hook-like member 27a (see FIG. 11) fixed to the round bar member 27. And this fixing tool 90 is comprised so that the state which hooked and fastened the hook-shaped member 27a, and the open state can be easily switched by one touch (for example, with one finger). Therefore, after the spraying unit 44 is positioned, the spraying unit 44 can be easily fixed to the mounting stay 87 by hooking the fixing member 90 to the hook-like member 27a.

  As described above, the attachment of the spraying unit 44 can be completed simply by stopping with the fixture 90. Then, by simply attaching the spraying unit 44 to the support frame 43, the clutch members 49, 76 can be engaged with each other (the drive drive shaft 48 and the drive transmission mechanism are connected). In this manner, the spraying unit 44 can be easily attached and removed without the need for screwing or the need to attach a drive transmission mechanism or a clutch operating mechanism.

  As explained above, the box applicator spreader 40 is mounted on the rice transplanter 1 of the present embodiment. The box application agent sprayer 40 includes a plurality of spraying units 44, a link mechanism 91, a driving force distribution mechanism 92, and a unit clutch 78 provided corresponding to each of the spraying units 44. Each of the spraying units 44 includes a hopper 45, a feeding portion 46 that feeds out the medicine in the hopper 45, and a feeding drive shaft 48 that rotationally drives the feeding portion 46. One hopper 45 and one feeding drive shaft 48 are provided for each spraying unit 44. Each dispensing unit is provided with two feeding portions 46. The link mechanism 91 transmits the driving force from the planting case 32 of the rice transplanter 1 to the driving force distribution mechanism 92. The driving force distribution mechanism 92 distributes the driving force input from the link mechanism 91 to each unit clutch 78. Each unit clutch 78 can be switched between connection and disconnection between the feeding drive shaft 48 and the driving force distribution mechanism 92 provided in the corresponding spraying unit 44.

  Thus, by providing the unit clutch 78 corresponding to each spraying unit 44, the presence or absence of the drive of the feeding part 46 can be switched for every spraying unit 44 as needed. Therefore, it is possible to prevent unnecessary medicine from being scattered. In addition, since the two feeding portions 46 are driven by one feeding drive shaft 48, only one unit clutch 78 is required for switching whether the two feeding portions 46 are driven. Therefore, the spray unit 44 can be configured at low cost, and the configuration for operating the clutch can be simplified.

  Further, the box application agent spreader 40 of the present embodiment includes a first drive transmission shaft 72, a plurality of first drive transmission gears 73, a plurality of second drive transmission gears 74, and a plurality of second drive transmission shafts 75. And comprising. The first drive transmission shaft 72 is rotationally driven by the driving force transmitted by the link mechanism 91. The plurality of first drive transmission gears 73 are fixed to the first drive transmission shaft 72. Each of the plurality of second drive transmission gears 74 is disposed corresponding to the first drive transmission gear 73. Each of the plurality of second drive transmission shafts 75 is fixed to the second drive transmission gear 74. The first drive transmission gear 73 and the second drive transmission gear 74 corresponding to the first drive transmission gear 73 are directly meshed with each other, whereby the driving force from the first drive transmission shaft 72 is distributed to each second drive transmission shaft 75. Is done. Unit clutches 78 are disposed at both ends of the second drive transmission shaft 75.

  Thereby, the driving force transmitted by one link mechanism 91 can be distributed to each unit clutch 78 to drive the feeding portions 46 of the plurality of spraying units 44. Thus, since only one link mechanism 91 is required, the driving force can be transmitted with a simple configuration. Moreover, since the driving force can be transmitted to the feeding drive shaft 48 of each spraying unit 44 after the driving force is branched to the plurality of second drive transmission shafts 75 via the drive transmission gears 73 and 74, The degree of freedom of the layout of the spreading unit 44 can be increased.

  Moreover, the box application agent spreader 40 of this embodiment is comprised as follows. That is, the unit clutch 78 is provided corresponding to the plurality of planting cases 32. And the box application agent spreader 40 is a clutch interlocking capable of interlocking the streak clutch provided in each of the plurality of planting cases 32 and the unit clutch 78 corresponding to the position of the planting case 32. Provide mechanism.

  Thereby, the presence or absence of the drive of the feeding part 46 of the spreading | diffusion unit 44 can be switched according to the staple clutch operation of the rice transplanter 1. FIG. And since the unit clutch 78 is provided corresponding to the planting case 32, when it stops with the rice transplanter 1, it will interlock | cooperate with this and it will be in the line | wire (the line which is not planting). The feeding portion 46 of the corresponding spraying unit 44 is not driven. Thereby, it can prevent that a chemical | medical agent is consumed wastefully.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be configured as follows, for example.

  In the said embodiment, although the rice transplanter was comprised as a rice transplanter for 8 items | strains, if it is not only this but a 3 or more item rice transplanter, the structure of this invention is applicable.

  Moreover, in the said embodiment, although each sprinkling unit 44 was set as the structure provided with two feeding parts 46, there may exist a sprinkling unit with only one feeding part. In particular, when the rice transplanter is for odd-numbered strips, the feeding unit provides one or more two spraying units and the feeding unit provides one spraying unit, thereby matching the number of strips with the number of feeding units. be able to.

  The structure of this invention is applicable not only to a box application agent spreading machine but the whole solid body spreading machine for spreading a solid body. For example, the configuration of the present invention can be applied to a fertilizer applicator for spraying granular fertilizer.

  Moreover, when applying the structure of this invention to a fertilizer machine as mentioned above, you may comprise as follows. That is, as shown in FIG. 13, instead of the shooter 47 having the configuration of the above embodiment, a flexible tube 93 that penetrates the seedling mount 39 and extends to the vicinity of the ground is connected to the lower portion of the feeding portion 46. Then, as shown in FIG. 14, by connecting the lower end of the flexible tube 93 to the groove generator 38 and supplying fertilizer into the hopper 45, it can function as a fertilizer machine 95. Thereby, the parts of a fertilizer applicator and a box application agent spreader can be made common.

  The work vehicle is not limited to a rice transplanter. For example, the solid material spreader of the present invention may be configured as a soil modifier spreader mounted on a tractor.

1 Rice transplanter (work vehicle)
30 planting part 32 planting case 40 box application agent spreader (solid matter spreader)
43 Support frame 44 Spreading unit 45 Hopper 46 Feeding part 47 Shuta (drug guide member)
48 Feeding drive shaft (drive shaft)
91 Link mechanism (link part)
92 Driving force distribution mechanism

Claims (4)

A solid material spreader mounted on a work vehicle,
Multiple spraying units,
Link part,
A driving force distribution mechanism;
A unit clutch provided corresponding to each of the spraying units;
With
Each of the spraying units includes a hopper, a feeding portion for feeding out the medicine in the hopper, and a drive shaft for rotationally driving the feeding portion,
The hopper and the drive shaft are provided one for each spraying unit,
At least one of the plurality of spraying units is provided with two feeding sections,
The link portion transmits a driving force from the work vehicle to the driving force distribution mechanism,
The driving force distribution mechanism distributes the driving force input from the link portion to the unit clutches,
Each of the unit clutches can be switched between connection and disconnection between the drive shaft and the drive force distribution mechanism provided in the corresponding spray unit. The solid material spreader according to claim 1,
The driving force distribution mechanism is
An input side drive transmission shaft that is rotationally driven by the driving force transmitted by the link portion;
A plurality of first drive transmission gears fixed to the input side drive transmission shaft;
A plurality of second drive transmission gears each disposed corresponding to the first drive transmission gear;
A plurality of output side drive transmission shafts each fixed to the second drive transmission gear;
With
Each of the first drive transmission gears and the corresponding second drive transmission gear mesh with each other directly or indirectly, so that the driving force from the input side drive transmission shaft is applied to each output side drive transmission shaft. Distributed,
The solid material spreader, wherein the unit clutch is disposed at at least one of both ends of the output side drive transmission shaft. The solid material spreader according to claim 1 or 2,
The work vehicle is a rice transplanter provided with a plurality of planting cases,
The unit clutch is provided corresponding to the plurality of planting cases,
A solid material disperser comprising a clutch interlocking mechanism capable of interlocking a hooking clutch provided in each of the plurality of planting cases and a unit clutch corresponding to the position of the planting case. .   A work vehicle equipped with the solid material spreader according to any one of claims 1 to 3.

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