JP4711407B2 - Fertilizer application unit - Google Patents

Description

  The present invention relates to a rice transplanter, and more particularly, to a fertilizer unit applied to a rice transplanter.

It is conventionally known that a fertilizer and a fertilizer blower are attached to a work vehicle main machine of a rice transplanter, and the fertilizer fed from the fertilizer is supplied to a place to be fertilized by the fertilizer blower.
Specifically, the fertilizer application apparatus includes a fertilizer hopper that stores fertilizer, a fertilizer feeding body that communicates with a lower end opening of the fertilizer hopper, and a fertilization hose that communicates with the fertilizer feeding body.
The fertilizer blower is fluidly connected to the fertilizer application device so that the fertilizer fed from the fertilizer feeding body can be pumped to a place to be fertilized via the fertilizer hose.

By the way, the fertilizer application apparatus normally uses the space between the driver's seat and the seedling stage, and is arranged along the vehicle width direction by the number corresponding to the number of rice transplanters (the number of seedling stages). It is installed side by side.
That is, four fertilizers are juxtaposed in the vehicle width direction in the four-row planting rice transplanter, and eight fertilizers are juxtaposed in the vehicle width direction in the eight-row planting rice transplanter.
Therefore, when the fertilizer is fixedly installed, particularly in a fertilizer applied at the center in the vehicle width direction, it is difficult to discharge residual fertilizer in the fertilizer hopper and to perform maintenance work.

From such a point of view, it has been proposed that the fertilizer application device be installed so as to be movable up and down relative to the work vehicle main machine (see Patent Document 1 below).
However, in such a conventional configuration, there is a problem that a complicated structure is required for raising and lowering the fertilizer application, resulting in high costs.
Furthermore, even if the fertilizer is raised, there is a work vehicle main unit below the fertilizer, so the fertilizer placed at the center in the vehicle width direction is still subject to residual fertilizer discharge work and maintenance work. Difficulty remains.
Japanese Patent Laid-Open No. 10-290611

  The present invention has been made in view of the above-described prior art, and is a fertilizer unit that can be attached to a work vehicle main body of a rice transplanter, and has a structure capable of facilitating discharge work and maintenance work of residual fertilizer in a fertilizer applicator. One purpose is to provide a simple fertilizer unit.

In order to achieve the above object, the present invention provides a fertilizer unit that can be attached to a work vehicle main machine of a rice transplanter, and is configured to supply fertilizer to be accommodated, and supports the fertilizer device A movable member that is operable to connect the fertilizer to a drive source of the work vehicle main body and a maintenance position that positions the fertilizer to the outside of the fertilizer work position in the vehicle width direction. a movable member which is relatively movable along the width direction of the vehicle relative to the prior SL work vehicle the machine as an air pipe which is supported by the movable member, fertilization blower for supplying manure pumping air to said air pipe When the movable member is positioned at the maintenance position, the residual fertilizer discharge port of the fertilizer case in the fertilizer apparatus located at the innermost position in the vehicle width direction is a rear wheel of the work vehicle main unit. It is located substantially above Providing a fertilizer unit, characterized in that.

  In the fertilization unit according to the present invention, the movable member can be positioned at the maintenance position while the movable member can be positioned at the fertilization work position.

  As described above, according to the fertilization unit according to the present invention, the movable member is positioned at the maintenance position while enabling the fertilization work by positioning the movable member at the fertilization work position. The discharge operation of the residual fertilizer and the maintenance operation of the fertilizer can be performed easily and easily.

Further, in the fertilization unit according to the present invention, when positioning the front Symbol movable member to the maintenance position, substantially above the rear wheel of a discharge port in the fertilizing device which is located innermost in the vehicle width direction is the work vehicle camcorder Therefore, not only the fertilizer other than the fertilizer that is located in the innermost part in the vehicle width direction, but also the fertilizer that is located in the innermost part in the vehicle width direction remains from the discharge port in the fertilizer. A work space for the fertilizer discharge work can be secured well, and the discharge work can be performed smoothly and reliably. For example, even when the fertilizer is disposed between a driver's seat provided in the work vehicle main unit and a seedling stage, an operator can use a rear wheel of the work vehicle main unit and the seedling stage. Maintenance work can be performed from behind the vehicle of the fertilizer application apparatus without intervening work and maintenance workability can be improved accordingly. Further, in the maintenance position, it is possible to prevent the fertilizer application apparatus from being moved excessively outward in the vehicle width direction, thereby realizing the reduction of the maximum vehicle width in the maintenance position, and accordingly, in the vehicle width direction. The space required for the movement of the fertilizer application can be reduced.

In order to achieve the above object, the present invention is a fertilizer unit that can be attached to a work vehicle main machine of a rice transplanter, and is configured to supply fertilizer to be accommodated, and the fertilizer apparatus A fertilization work position where the fertilizer is operatively connected to a drive source of the work vehicle main machine, and a maintenance position where the fertilizer is located outward in the vehicle width direction from the fertilizer work position. e Bei a movable member relatively movable along the vehicle width direction with respect to the service vehicle the machine so as to obtain, and a locking mechanism for holding the movable member in the fertilization working position, the locking mechanism, When the movable member is positioned at a fertilization work position, a fertilizer unit is provided that is disposed outward in the vehicle width direction from the rear wheel of the work vehicle main machine .
According to such a configuration, when the Hare line manually operating the lock operation and unlocking operation of the locking mechanism, since the locking operation and unlocking operation of the lock mechanism can be performed in the vehicle width direction outer side, respectively, for example, When an operator gets off from the work vehicle main body and moves the movable member outward in the vehicle width direction, the lock mechanism is easily locked and unlocked at the movable operation position of the movable member. Can do. Thereby, the effort of the movement operation | movement which an operator moves unnecessarily can be saved.

According to the fertilizing unit according to the present invention, a fertilizing device configured to be able to supply fertilizer to be accommodated, and a movable member supporting the fertilizing device, wherein the fertilizing device is used as a drive source for the work vehicle main unit. It is possible to move relative to the work vehicle main body in the vehicle width direction so that a fertilization work position to be operatively connected and a maintenance position in which the fertilizer application device is located outward in the vehicle width direction from the fertilization work position can be taken. Since the movable member is provided, it is possible to provide a fertilizer application unit having a simple structure capable of facilitating the discharge work and maintenance work of the residual fertilizer in the fertilizer application apparatus.

Further, an air pipe which is supported by said movable member, said Bei example a fertilizer blower for supplying manure pumping air to the air pipe, the fertilizing device, a fertilizer hopper for containing the fertilizer, the lower end opening of the fertilizer hopper A connected fertilization case, a fertilization feeding mechanism housed in the fertilization case, and a connection in which an intermediate region between one end and the other end is connected to a lower end opening of the fertilization case below the fertilization feeding mechanism A pipe having one end fluidly connected to the air pipe and the other end acting as a fertilizer discharge port, and when the movable member is positioned at a maintenance position, the vehicle width When the discharge port in the fertilizer that is located at the innermost side in the direction is configured to be located substantially above the rear wheel of the work vehicle main unit, the fertilizer that is located at the innermost side in the vehicle width direction. Before As well as the fertilizer, the fertilizer that is located at the innermost side in the vehicle width direction can also ensure a good discharge work space for residual fertilizer from the discharge port in the fertilizer, and perform smooth and reliable discharge work accordingly. It is possible.
A lock mechanism for holding the movable member at the fertilization work position; and when the movable mechanism positions the movable member at the fertilization work position, the vehicle is located outward in the vehicle width direction from the rear wheel of the work vehicle In this case, the lock mechanism can be easily locked and unlocked, and the labor of the operator moving unnecessarily can be saved.

Embodiments according to the present invention will be described below with reference to the accompanying drawings.
In FIG. 1, the side view of the rice transplanter A to which the fertilization unit 100 which concerns on this Embodiment was applied is shown.

First, the whole structure of the rice transplanter A will be described with reference to FIG.
The rice transplanter A includes a work vehicle main machine 1, a planting device 3 attached to the rear of the work vehicle main machine 1, and the work vehicle main machine 1 so as to be positioned in front of the planting device 3. And a fertilization unit 100 attached to the rear.

  As shown in FIG. 1, the work vehicle main machine 1 includes a vehicle body frame 5, a drive source 6 mounted on a front portion of the vehicle body frame 5, and the drive in a state of being operatively connected to the drive source 6. A transmission case 8 disposed behind the power source 6, a pair of front axle cases 9 disposed on both sides of the transmission case 8 in the vehicle width direction, and the pair of front axle cases 9 via a front axle 10A. A pair of paddy field front wheels 10 supported respectively, a rear axle case 12 connected to the rear portion of the transmission case 8 via a connecting frame 11, and a rear axle 13A on both sides of the rear axle case 12 in the vehicle width direction. A pair of supported paddy field rear wheels 13 are provided.

  Further, the work vehicle main machine 1 includes a bonnet 7 that covers the drive source 6, a vehicle body cover 14 that is stretched on the vehicle body frame 5 so as to cover the transmission case 8, and the vehicle body cover 14. A driver's seat 21, a steering handle 20 disposed in front of the driver's seat 21 and at the rear of the bonnet 7, and spare seedling platforms 50 provided on both sides of the bonnet 7 in the vehicle width direction. ing.

The vehicle body cover 14 includes an auxiliary step 15 disposed on both sides of the bonnet 7 in the vehicle width direction, a main step 16 disposed behind the bonnet 7, and a driver seat step disposed behind the main step 16. 17 and a rear step 18 disposed behind the driver's seat step 17.
The driver's seat step 17 and the rear step 18 are provided via a rear frame 25 erected on the vehicle body frame 5.

  The planting device 3 includes a planting case 38, a seedling stage 33, and a seedling feed belt mounted on the seedling stage so that the seedling mat placed on the seedling stage 33 can be conveyed downward. (Not shown), a rotary case 31 rotatably supported by the planting case 38, and a claw case 32 supported by the rotary case 31 and having a planting claw. ing.

In the present embodiment, the planting device 3 is for eight strips in which eight single-row seedling platforms 33 on which one row of seedling mats can be placed are arranged in parallel in the vehicle width direction. .
A pair of the rotary cases 31 are provided on both sides of the planting case 38 in the vehicle width direction.
In other words, in the present embodiment, the planting device 3 has four double-planting cases 38 and eight rotary cases 31.

  The planting device 3 includes a planting drive case 26 having a planting input shaft (not shown) operatively connected to a planting PTO shaft (not shown) provided in the work vehicle main unit 1; A horizontal pipe case (not shown) that is connected to the planting drive case 26 so as to extend in the vehicle width direction and in which a planting drive shaft that is operatively connected to the planting input shaft is inserted. ), A pair of left and right side frames 34 erected on the horizontal pipe case, and a rolling frame (not shown) extending in the vehicle width direction so as to connect the upper portions of the pair of left and right side frames 34. I have.

  Further, the planting device 3 includes a center float 35 and a side float 36 disposed below the planting case 38.

The planting device 3 having such a configuration is connected to the work vehicle main unit 1 so as to be movable up and down via a lifting link mechanism 2 inserted between the vehicle body frame 5 and the planting drive case 26. Has been.
Specifically, the lifting link mechanism 2 includes a lifting link 27 extending between the machine body frame 5 and the planting drive case 26, and a lifting hydraulic pressure interposed between the lifting link 27 and the connecting frame 11. And a cylinder 28.
By having such a configuration, the planting device 3 is moved up and down with respect to the work vehicle main unit 1 by moving the lifting hydraulic cylinder 28 forward and backward.

FIG. 2 shows a schematic left side view including a partial cross section near the fertilizer application unit 100. FIG. 3 shows a schematic front view of the fertilizing unit 100.
As shown in FIGS. 1 to 3, the fertilizer application unit 100 is supported by the vehicle body frame 5 via a fertilization support machine frame 39 so as to be positioned between the driver's seat 21 and the seedling stage 33. ing.

  The fertilizer unit 100 includes a movable member 1200 movably connected to the work vehicle main machine 1 along a vehicle width direction, a fertilizer device 130 supported by the movable member 1200, and the fertilizer device 130. And a turbo blower-type fertilizer blower 140 that pumps out the fed fertilizer. In the present embodiment, the fertilizer application unit 100 further includes a fixed-side rail 110 that cannot be moved relative to the work vehicle main machine 1, and the movable member 1200 includes the movable-side rail 120. The movable rail 120 is connected to the fixed rail 110 so as to be movable along the vehicle width direction, and supports the fertilizer 130. More specifically, the first and second movable members 1210 and 1220 as the movable member 1200 have first and second movable side rails 120a and 120b as the movable side rail 120, respectively. The first and second movable-side rails 120a and 120b are connected to the first and second fixed-side rails 110a and 120b as the fixed-side rail 110 so as to be movable along the vehicle width direction, and the fertilizer is applied. The first and second fertilizer applicators 130a and 130b as the device 130 are supported.

The fertilizer application unit 100 includes a plurality of the fertilizers 130 corresponding to the number of planting strips of the rice transplanter A, so that the fertilizer fed from the fertilizers 130 can be pumped by the single fertilizer blower 140. It is configured.
Specifically, in addition to the above configuration, the fertilizer application unit 100 includes an air pipe 150 fluidly connected to the plurality of fertilizer applicators 130, and the base end of the air pipe 150 (the progress of the arrow in FIG. 1). The fertilizer blower 140 is connected to the vehicle width direction left end as viewed from the worker heading in the direction, and the fertilizer blower 140 pumps the fertilizer fed from the plurality of fertilizer applicators 130 via the air pipe 150. It is like that.
In the present embodiment, the rice transplanter is an 8-row type. Therefore, the fertilizer application unit 100 includes eight fertilizer application devices 130.

  The plurality of fertilizer applicators 130 are configured to be able to supply fertilizer to be accommodated, and are arranged in parallel along the vehicle width direction behind the driver seat 21 as shown in FIGS. 1 and 2. Both have the same configuration.

  FIG. 4 is a schematic cross-sectional view mainly showing the fertilizer application unit 130 in the fertilizer application unit 100, and FIG. 5 is an exploded perspective view of the main part of the fertilizer application unit 130.

  As shown in FIGS. 4 and 5, the fertilizer applying device 130 includes a fertilizer hopper 131 having upper ends 131 a and lower ends 131 b opened, a fertilizer case 135 connected to the lower end 131 b opening of the fertilizer hopper 131, and the fertilizer. A fertilizer feeding mechanism 136 (not shown in FIG. 4, refer to FIG. 5) housed in the case 135 and a cleaner mechanism 138 (see FIG. 5) for removing the fertilizer adhering to the inner peripheral surface of the lower case 45 described later in the fertilizing case 135. 4 and the intermediate region 133c between the one end portion 133a and the other end portion 133b is below the fertilizer feeding mechanism 136 (and further below the cleaner mechanism 138), and The connecting pipe 133 connected to the lower end 135b opening of the lower case 45 and the fertilizer release of the connecting pipe 133 at the base end And the tip portion communicates with the other end portion 133b is provided with a fertilizer hose 134 located on the side of the corresponding float 35 acting as a mouth.

  The fertilizer hopper 131 accommodates fertilizer, and a lower end 131b is connected to an upper end 135a of the fertilizer case 135 via a joining member 137 so as to be able to contact and separate. The joining member 137 includes a case side tubular joint 137a, a hopper side tubular joint 137b, and a seal member 137c. One end of the case-side cylindrical joint 137a is attached to the upper end 135a of the fertilizing case 135, and the top of the other end is a contact portion 137a 'having a relatively large area. One end of the hopper side cylindrical joint 137b is attached to the lower end 131b of the fertilizer hopper 131, and the other end has an inner diameter larger than the outer diameter of the other end of the case side cylindrical joint 137a. And has a pedestal portion 137b ′ that contacts the contact portion 137a ′ via the seal member 137c. The seal member 137c is made of a ring-shaped rubber material, and is provided on one of the contact portion 137a 'and the pedestal portion 137b'. Accordingly, the contact portion 137a ′ is brought into contact with the pedestal portion 137b ′ via the seal member 137c, so that the lower end 131b opening of the fertilizer hopper 131 is sealed with the seal member 137c. A fluid connection can be made to the fertilizer case 135. The fertilizer hopper 131 is held by the arm member 400 so as to be able to contact and separate from the fertilizer case 135 as will be described later.

  The fertilizer case 135 is connected to the lower end opening 131b of the fertilizer hopper 131 so as to communicate with the fertilizer receiving port 44 (see FIG. 5) through which the fertilizer in the fertilizer hopper 131 can be introduced and the fertilizer receiving port 44. It has a fertilizer supply port 41, and has a middle case 42, an upper case 43 having the fertilizer receiving port 44, and a funnel-like (lower constricted) lower case 45 having the fertilizer supply port 41. Yes. The upper case 43 and the lower case 45 are detachably connected to the middle case 42 and are provided above and below the middle case 42, respectively. The middle case 42 is supported by a movable side frame 180 described later (see also FIG. 6 described later), and the upper case 43 communicates with the lower end 131b opening of the fertilizer hopper 131 on the upstream side of the feeding mechanism 136. And a discharge port 73 that can discharge the residual fertilizer of the fertilizer hopper 131. The fertilizer hopper 131, the upper case 43, and the lower case 45 are formed of a permeable member in this embodiment.

  A storage portion 48 (see FIG. 5) is provided in the upper portion of the upper case 43 adjacent to the rear of the fertilizer receiving port 44, and a horizontal bearing portion 46 through which a transmission shaft 160, which will be described later, penetrates. And a longitudinal bearing portion 47 through which a feeding drive shaft 55 described later passes. The storage portion 48 is internally provided with a bevel gear 91 attached to the transmission shaft 160 and a bevel gear 75 attached to the upper end portion of the feeding drive shaft 55 in mesh with each other (see FIG. 5). The upper opening is sealed with a synthetic resin lid 49 having elasticity such as rubber (see FIG. 4).

  Further, as shown in FIG. 4, the arm member 400 described above is provided on the outer surface of the fertilization hopper 131. The arm member 400 has a movable-side rear side so that a fertilizer supply position where the lower end 131b opening is connected to the fertilizer receiving port 44 and a retracted position allowing the upper case 43 to be detached upward can be taken. The frame 180 ″ is supported so as to be swingable about the swing axis Q. As a result, when the fertilizer hopper 131 is located at the fertilizer supply position, the fertilizer hopper 131 can be securely held by the fertilizer case 135. In addition, when the fertilizer hopper 131 is located at the retracted position, the fertilizer hopper 131 is separated from the fertilizer case 135 supported by the movable frame 180, so that maintenance work and cleaning work can be performed easily and easily. it can.

  As shown in FIG. 5, the feeding mechanism 136 includes an upper cover body 51 disposed so as to block between the fertilizer receiving port 44 and the fertilizer supply port 41, and the fertilizer receiving port below the upper cover body 51. 44 and the fertilizer supply port 41, a lower cover body 58 disposed so as to be blocked, an eye plate body 56 interposed between the upper cover body 51 and the lower cover body 58, and the upper cover And a feeding drive shaft 55 that is rotatable relative to the body 51 and the lower cover body 58 but not relative to the eye plate body 56, and includes the upper case 43 and the middle case 42. It is accommodated in the upper case 43 so as to be detached, and is operatively driven by power from the drive source 6 of the work vehicle main machine 1.

  That is, the upper cover body 51 is a receiving hole 54 that communicates between the upper surface and the lower surface, the receiving hole 54 that communicates with the fertilizer receiving port 44 and extends substantially half a circumference along the circumferential direction, and the feeding-out It has a center opening 51a having a circular shape in plan view that penetrates the drive shaft 55, and is fixed to the upper portion of the upper case 43 in a non-rotatable and detachable manner. The lower cover body 58 is a passage hole 59 that communicates between the upper surface and the lower surface, and is cut along the circumferential direction so as to face the receiving hole 54 with respect to the rotation center of the feeding drive shaft 55. A notched passage hole (notch hole) 59 and a central opening 58a having a circular shape in plan view that penetrates the feed drive shaft 55 are fixed to the lower portion of the upper case 43 in a non-rotatable and detachable manner. Yes. Further, a feeding hole 57 communicating between the upper surface and the lower surface is provided between the upper cover body 51 and the lower cover body 58 and is the same as the receiving hole 54 extending in the circumferential direction of the upper cover body 51. An eye plate having a plurality of feed holes 57 provided over the entire circumference along a circumferential direction at a position corresponding to the rotational radius position, and a central opening 56a having a rectangular shape in plan view that penetrates the feed drive shaft 55. A body 56 is rotatably arranged by the feeding drive shaft 55.

  The upper cover body 51, the eye plate body 56, and the lower cover body 58, which are configured in this way, are located on the fertilizer receiving port 44 side with respect to the rotation center, and the receiving hole 54 of the upper cover body 51. And the feeding hole 57 of the eye plate body 56 communicate with each other, and on the side opposite to the fertilizer receiving port 44 side with respect to the rotation center, the feeding hole 57 of the eye plate body 56 and the lower cover body 58 is accommodated in the upper case 43 so as to communicate with the passage hole 59.

  The feed-out drive shaft 55 has a penetrating portion formed in a rectangular shape in cross section passing through the central openings 51a, 56a, and 58a in the upper cover body 51, the eye plate body 56, and the lower cover body 58. Of these, only the center opening 56a having a rectangular shape in plan view formed in the eye plate body 56 is engaged. As a result, the feeding drive shaft 55 and the eye plate body 56 can rotate integrally with the rotation of the feeding drive shaft 55. By rotating the eye plate body 56 in this manner, the fertilizer receiving port 44 of the upper case 43 arrives at the feeding hole 57 of the eye plate body 56 through the receiving hole 54 of the upper cover body 51. The incoming fertilizer can be moved to the passage hole 59 of the lower cover body 58 and dropped onto the lower case 45.

  The cleaner mechanism 138 includes a cleaner drive shaft 64 fitted to the lower end engaging portion 55a of the feed drive shaft 55 so as not to rotate relative to the axis and to be separated in the axial direction, and a flange member provided on the cleaner drive shaft 64. 65, an urging member 67 whose upper end portion engages with the flange member 65 (in this embodiment, a coil spring), and a cleaner connected to the lower case 45 so as to hold the lower end portion of the coil spring 67. It has a support member 66 and a cleaner member 69 attached to the lower end of the cleaner drive shaft 64, and is accommodated in the lower case 45 so as to be detached from the middle case 42 together with the lower case 45. The lower case 45 in which the cleaner mechanism 138 is accommodated is connected to the middle case 42 in which the feeding mechanism 136 is accommodated. It is, power from the feeding mechanism 136 is adapted to be transmitted operatively.

  More specifically, the cleaner support member 66 has a through hole 66a through which the lower end portion of the cleaner drive shaft 64 passes, and two cleaner support members 66 provided to face each other on the inner side of the upper end portion of the lower case 45. It is attached to the fixing portions 45a and 45a. The cleaner member 69 has a substantially bowl-like shape that slides on the inner peripheral surface of the lower case 45 as the cleaner drive shaft 64 rotates about its axis. The cleaner drive shaft 64 fitted to the lower end engaging portion 55a of the feeding drive shaft 55 has an engaged portion 64a at the upper end portion, and between the fixed portions 45a and 45a in the lower case 45. It penetrates through the cleaner support member 66 that is mounted on the body. The cleaner drive shaft 64 is provided with the flange member 65 near the upper end. The cleaner drive shaft 64 is interposed between the flange member 65 and the cleaner support member 66 with the coil spring 67 fitted on the outer periphery of the cleaner drive shaft 64. The upper end engaged portion 64 a is engaged with the lower end of the feeding drive shaft 55 by being pressed against the feeding drive shaft 55 through the flange member 65 by the elastic biasing force of the coil spring 67 holding the lower end portion. It is engaged with the portion 55 a and rotates together with the feeding drive shaft 55.

  Further, as described above, the substantially bowl-shaped cleaner member 69 is attached to the lower end portion of the cleaner drive shaft 64. Accordingly, the cleaner member 69 rotates so as to substantially follow the inner peripheral surface of the lower case 45 in conjunction with the rotation of the cleaner drive shaft 64 due to the rotation of the feeding drive shaft 55. The fertilizer adhering to the peripheral surface can be removed, and therefore, the fertilizer clogging can be surely prevented.

  As shown in FIG. 4, a discharge guide tube 72 that is inclined forward and downward is integrally provided on the upper case 43 at the front lower side of the fertilizer receiving port 44 in the vehicle front-rear direction. Is attached with an open / close valve (not shown) configured to be capable of opening and closing based on a manual operation. The discharge guide tube 72 is fitted with a discharge tube 74 made of a soft synthetic resin having the discharge port 73. As a result, the residual fertilizer guided from the fertilizer receiving port 44 of the upper case 43 to the discharge cylinder 74 via the discharge guide cylinder 72 by rotating the on-off valve in the opening direction is discharged into the discharge cylinder 74. It is possible to discharge from the discharge port 73.

  The fertilizer application apparatus further includes an upper case locking mechanism 410 that connects and holds the upper case 43 to the middle case 42, and a lower case locking mechanism 420 that connects and holds the lower case 45 to the middle case 42. I have.

  FIG. 6 shows a state in which the upper case 43 is connected and held to the middle case 42 by the upper case locking mechanism 410 and the lower case 45 is connected and held to the middle case 42 by the lower case locking mechanism 420. It is a perspective view.

  As shown in FIG. 6, the upper case support mechanism 410 is opposed to the outer surface of one of the upper case 43 and the middle case 42 (in the present embodiment, the middle case 42) so as to extend outward. The pair of first pivot shafts 411 and 411 and the base end portions 412a and 412a are swingably supported by the pair of first pivot shafts 411 and 411, respectively, and free end portions 412b and 412b. A pair of first engaging arms 412 and 412 provided with first engaging portions 413 and 413 respectively, and the other of the upper case 43 and the middle case 42 (the upper case 43 in the present embodiment). It has a pair of 1st to-be-engaged parts 414 and 414 provided on the surface so as to be engaged with the first engaging parts 413 and 413, respectively. In the upper case support mechanism 410, the upper case 43 is prevented from being detached from the middle case 42 by engaging the first engaging portions 413, 413 and the first engaged portions 414, 414. is doing.

  The lower case support mechanism 420 is a pair of outer casings that extend outward and face each other on the outer surface of one of the lower case 45 or the middle case 42 (the middle case 42 in the present embodiment). Second pivot shafts 421 and 421 (in this embodiment, a pair of second pivot shafts 421 and 421 integrated with the first pivot shaft 411) and base end portions 422a and 422a are the pair of first pivot shafts 421a and 422a. A pair of second engagement arms 422 and 422 that are swingably supported by the two pivot shafts 421 and 421 and that have second engagement portions 423 and 423 provided at the free ends 422b and 422b, respectively, A pair of second engaged members provided on the outer surface of the case 45 or the other of the middle case 42 (the lower case 45 in the present embodiment) so as to be engaged with the second engaging portions 423 and 423, respectively. Joint part 424, 42 And it has a door. In the lower case support mechanism 420, the lower case 45 is prevented from being detached from the middle case 42 by engaging the second engaging portions 423, 423 and the second engaged portions 424, 424. is doing.

  As shown in FIG. 4, the connecting pipe 133 is disposed so as to receive fertilizer from the fertilizer supply port 41 in the intermediate region 133c, and the one end 133a is fluidly connected to the air pipe 150, The other end 133b is fluidly connected to the fertilizer hose 134. As a result, the fertilizer fed from the feeding mechanism 136 can be supplied to the fertilization hose 134. In the present embodiment, the connecting pipe 133 is formed integrally with the lower case 45 of the fertilizing case 135.

As described above, in the present embodiment, the fertilizer application unit 100 includes the eight fertilizer applicators 130 arranged in parallel in the vehicle width direction.
Then, each fertilizer application device 130 operates on the drive source 6 via a work PTO shaft (not shown) projecting backward from the transmission shaft 160 disposed along the vehicle width direction to the mission case 8. It is designed to be connected.

  Specifically, in addition to the above configuration, the fertilizing unit 100 includes an input unit 171 (see FIG. 10 described later) that is operatively connected to the drive source 6 via the working PTO shaft, as shown in FIG. It has a power transmission mechanism 170 for fertilization.

  The power transmission mechanism 170 is fixedly supported substantially at the center in the vehicle width direction, and one or more (four in the present embodiment) located on one side in the vehicle width direction with respect to the power transmission mechanism 170 as a reference. Fertilizer (hereinafter referred to as the first fertilizer 130a) and one or more (four in this embodiment) fertilizer (hereinafter referred to as the first fertilizer 130a) on the other side in the vehicle width direction It is comprised so that a driving force may be output with respect to both of the 2nd fertilizer 130b).

Specifically, the power transmission mechanism 170 transmits power input to the input unit 171 from the input unit 171 and the drive source 6 through the work PTO shaft to one side and the other side in the vehicle width direction. Output unit 172 (first and second output units 172a and 172b for outputting rotational power toward one side and the other side in the vehicle width direction, respectively) (to be described below, FIG. 10). reference).
In the present embodiment, a gear box is adopted as the power transmission mechanism 170, but it goes without saying that a link mechanism having a one-way clutch can be adopted instead.

  The fertilizer application unit 100 uses, as the transmission shaft 160, the first transmission shaft 160a that transmits the power from the first output unit 172a to the first fertilizer 130a, and the power from the second output unit 172b. And a second transmission shaft 160b that transmits the second fertilizer application device 130b.

  Further, the fertilizer application unit 100 includes first and second air pipes 150a and 150b arranged as one side and the other side in the vehicle width direction with the power transmission mechanism 170 interposed therebetween, as the air pipe 150, First and second air pipes 150a supported by the first and second movable members 1210 and 1220, respectively, in a state along the vehicle width direction so as to be fluidly connected to the first and second fertilizer applicators 130a and 130b, respectively. , 150b.

The first air pipe 150a is supported by the first movable member 1210 while being fluidly connected to the first fertilizer application device 130a, and the inner end portion and the outer end portion in the vehicle width direction are respectively opened. The blower opening of the fertilizer blower 140 is connected to the outer end in the vehicle width direction.
Further, the second air pipe 150b is supported by the second movable member 1220 so as to be positioned on the same axis P as the first air pipe 150a in a state of being fluidly connected to the second fertilizer application device 130b. When the first and second movable members 1210 and 1220 are both positioned at a fertilization work position described later, the inner end in the vehicle width direction is opened so as to be fluidly connected to the first air pipe 150a. The outer end portion in the vehicle width direction is sealed. The fertilizer blower 140 may be configured to supply fertilizer pressure air to at least one of the first air pipe 150a and the second air pipe 150b, but in the present embodiment, the first air pipe 150a. It is comprised so that fertilizer pressure ventilation may be supplied to.

  Further, the first and second air pipes 150a and 150b (150) are respectively connected to the first and second fertilizer applicators 130a and 130b (midway between the inner end and the outer end in the vehicle width direction). 130) is connected (see FIG. 4).

  The first and second movable members 1210 and 1220 are, in addition to the first and second movable side rails 120a and 120b, respectively, the first and second movable side frames 180a and 180b as the movable side frame 180, respectively. The first and second gripping portions 124a and 124b as the gripping portion 124 are provided.

  The first and second movable-side rails 120a and 120b and the first and second movable-side frames 180a and 180b are respectively positioned on one side and the other side in the vehicle width direction across the power transmission mechanism 170. The first and second movable side frames 180a and 180b are supported by the first and second movable side rails 120a and 120b, respectively. The first fertilizer 130a disposed on one side in the vehicle width direction across the output portion 172 of the power transmission mechanism 170, the first transmission shaft 160a for transmitting a driving force to the first fertilizer 130a, The first air pipe 150a fluidly connected to the first fertilizer 130a and the fertilizer blower 140 are supported by the first movable side rail 120a via the first movable side frame 180a, and The second fertilizer 130b disposed on the other side in the vehicle width direction across the output portion 172 of the power transmission mechanism 170, and the second transmission shaft 160b that transmits a driving force to the second fertilizer 130b. The second air pipe 150b fluidly connected to the second fertilizer application device 130b is supported on the second movable side rail 120b via the second movable side frame 180b.

  In the present embodiment, as shown in FIG. 4, the first and second movable-side rails 120 a and 120 b (120) are a pair of front and rear, and the front of the vehicle with respect to the axis P of the air pipe 150. One movable front rail 120 ′ that is movable in the vehicle width direction on the side, and the other movable rear rail 120 that is movable in the vehicle width direction on the vehicle rear side with respect to the axis P of the air pipe 150. The first and second movable side frames 180a and 180b (180) are also a pair of front and rear, and move in the vehicle width direction on the vehicle front side with respect to the axis of the feeding drive shaft 55. One movable-side front frame 180 ′ made possible and the other movable-side rear made movable in the vehicle width direction on the vehicle rear side with respect to the axis of the feed drive shaft 55 It has become since the frame 180 ".

  As shown in FIG. 2, the movable front rail 120 ′ of the movable rail 120 is disposed on the vehicle front side with respect to the axis P of the air pipe 150, and in the front view, the air pipe 150. Are arranged so as to overlap with the upper surface of the rear step 18 in a front view.

The first and second fixed-side rails 110a and 110b (110) are disposed on one side and the other side in the vehicle width direction with the power transmission mechanism 170 interposed therebetween, and the first and second fixed-side rails. The first and second movable rails 120a and 120b are engaged with the rails 110a and 110b (110), respectively, so as to be movable in the vehicle width direction. More, the fixed rail 110 is of a pair before and after, and 'one of the fixed-side front rail 1 1 0 corresponding to' the movable front rail 120, corresponding to the movable rear rail 120 ""it has become from the said fixed side front rail 110 other fixed-side rear rail 1 1 0 'and the fixed-side rear rail 110" the respective movable front rail 120' and the movable rear rail 120 "is the vehicle It is engaged so as to be movable in the width direction.

  7 (a) and 7 (b) respectively show the fixed-side rails 110a and 110b (110) of the first and second movable-side rails 120a and 120b (120) that are movably coupled along the vehicle width direction. 7 (c) is a front view schematically showing a connection state between the first and second fixed side rails 110a of the first and second movable side rails 120a and 120b (120). It is a schematic sectional drawing which shows an engagement state with 110b (110). In this embodiment, each rail is a pair of front and rear, but in FIG. 7, only one is shown and the other is not shown.

  As shown in FIG. 7, in the present embodiment, the fixed-side rail 110 is located at the end on the inner side in the vehicle width direction (left side in FIG. 7 (a), right side in FIG. 7 (b)). A mounting flange 111 located on the fertilizer support machine frame 39, and an outer side in the vehicle width direction from the mounting flange 111 (right side in FIG. 7A, FIG. 7B). The fixed rail main body 112 extending to the left side), the fixed side roller mounting flange 113 provided at the outer end of the fixed rail main body 112 in the vehicle width direction, and the first movable side rail 120. In this way, the fixed side rollers 114 and 114 are arranged on the outer side in the vehicle width direction, and at a predetermined interval along the vehicle width direction on the movable side rail 120 side of the fixed side roller mounting flange 113. Separate and rotate itself And a pair of fixed side roller 114, 114 supported on.

  The movable-side rail 120 includes a movable-side roller mounting flange 121 positioned at an end on the inner side in the vehicle width direction (left side in FIG. 7A, right side in FIG. 7B), and the movable-side roller. A pair of movable rollers 122, 122 rotatably supported by the mounting flange 121 so as to sandwich the fixed rail main body 112 from both sides in the vertical direction, and the pair of movable rollers of the movable roller mounting flange 121 A movable side roller 122 ′ which is rotatably supported to be engaged with the lower surface of the fixed rail body 112 at a position closer to the outer side than the side rollers 122, 122, and outward in the vehicle width direction from the movable side roller mounting flange 121. Extending to the side (right side in FIG. 7 (a), left side in FIG. 7 (b)) so as to cover the fixed-side rail 110, and the lower surface engages with the pair of fixed-side rollers 114, 114 And a movable rail body 123.

  As described above, the movable rail 120 is engaged with the movable side roller 122 ′ while the fixed rail body 112 is sandwiched and engaged with the pair of movable side rollers 122 and 122 with respect to the fixed side rail 110. In addition, the fixed side roller 114 is connected to the movable rail body 123 so as to be movable in the vehicle width direction.

  In the present embodiment, the fixed rail main body 112 of the fixed side rail 110 has a circular shape with a radius r in cross section as shown in FIG. 7 (c), and the movable side rollers 122, 122 ' The outer surface that engages with the fixed rail body 112 is concave with a curvature R, and the curvature R is larger than the radius r.

  In the fertilization unit 100 configured as described above, the first movable member 1210 causes the first fertilizer device 130a to move to the drive source 6 of the work vehicle main machine 1 (more specifically, the first fertilizer application power transmission mechanism 170). A fertilizer application position (see FIG. 3) to be operatively connected to one output section 172a) and a maintenance position (see FIG. 8) to position the first fertilizer application device 130a on one side outward in the vehicle width direction from the fertilizer application position. As can be seen, relative to the first fixed-side rail 110a in the work vehicle main machine 1 along the vehicle width direction. Further, the second movable member 1220 operatively connects the second fertilizer application device 130b to the drive source 6 of the work vehicle main machine 1 (more specifically, the second output portion 172b of the fertilizer application power transmission mechanism 170). The work vehicle main unit is configured so that a fertilization work position (see FIG. 3) and a maintenance position (see FIG. 8) for positioning the second fertilizer 130b on the other side in the vehicle width direction from the fertilization work position can be taken. 1 is movable relative to the second fixed rail 110b in the vehicle width direction. Thus, by making the first and second movable members 1210 and 1220 relatively movable with respect to the first and second fixed rails 110a and 110b, for example, the first and second movable members 1210, When moving the 1220 to the maintenance position, a space is provided in the central portion of the work vehicle main machine 1 (specifically, the portion facing the lifting link mechanism 2, the seedling mount 33 and the planting device 3). In the space of the central portion, assembly work and maintenance work can be easily performed from the front and above, and the assembly work and maintenance work can be improved accordingly. FIG. 8 is a front view showing the fertilizer application unit 100 in a state where the first and second movable rails 120a and 120b are positioned at the maintenance position.

  Preferably, when the first movable-side rail 120a is positioned at the maintenance position, the first fertilizer 130a ′ positioned at the innermost side in the vehicle width direction among the four first fertilizers 130a is the work vehicle main unit 1. When the second movable rail 120b is positioned at the maintenance position, the second fertilizer applied at the innermost position in the vehicle width direction among the four second fertilizers 130b. 130b 'may be comprised so that it may be located in the other side end vicinity of the working vehicle main machine 1. FIG.

  In the present embodiment, as shown in FIG. 8, when the first movable-side rail 120a is positioned at the maintenance position, the discharge port in the first fertilizer application device 130a ′ positioned at the innermost side in the vehicle width direction. 73 is positioned substantially above the outer side surface of the rear wheel 13 of the work vehicle main unit 1 and is positioned at the innermost position in the vehicle width direction when the second movable rail 120b is positioned at the maintenance position. The discharge port 73 in the second fertilizer application device 130b ′ is configured to be positioned substantially above the outer side surface of the rear wheel 13 of the work vehicle main machine 1.

  FIG. 9A shows a perspective view of the mounting state of the first gripping portion 124a as viewed from the rear side in the vehicle width direction, and FIG. 9B shows the mounting state of the second gripping portion 124b in the other side in the vehicle width direction. The perspective view seen from the side front is shown.

  As shown in FIG. 9, the grip portion 124 is connected to the movable side frame 180. As shown in FIG. 9 (a), the first holding portion 124a as the holding portion 124 has a first fixing for fixing and supporting the movable frame 180 and the outer end in the vehicle width direction of the movable rail 120. The movable front frame 180 'and the movable front rail 120' so as to be adjacent to the plate 40a, the first front grip portion 124a 'installed on the movable side front rail 120', and the movable plate so as to be adjacent to the first fixed plate 40a. Side rear frame 180 ″ and a first rear grip portion 124a ″ installed on the movable side rear rail 120 ″. Also, as shown in FIG. The second grip 124b is disposed on the movable front frame 180 ′ so as to be adjacent to the second fixed plate 40b that fixedly supports the outer ends of the movable frame 180 and the movable rail 120 in the vehicle width direction. And the second front gripping portion 124b 'installed on the movable front rail 120' and the second movable frame 120 "and the second movable rear rail 120" so as to be adjacent to the second fixed plate 40b. Second rear gripping portion 124b ".

  In the present embodiment, as shown in FIG. 9 (a), the first front gripping portion 124a ′ provided on the movable front frame 180 ′ is connected to the fertilizer blower 140 and the work in the vehicle width direction. The first rear grip portion 124a "disposed between the vehicle main unit 1 and provided on the movable rear frame 180" is disposed between the fertilizer blower 140 and the connection pipe 133 in the vehicle width direction. It is arranged.

  FIG. 10 (a) shows a cross-sectional view of the vicinity of the power transmission mechanism 170 in a state where both the first and second movable-side rails 120a and 120b are positioned at the fertilization work position, as viewed from the rear, and FIG. ) Is a cross-sectional view taken along line V (b) -V (b) in FIG.

  As shown in FIG. 10, in the present embodiment, the axial directions of the first transmission shaft 160a and the first output portion 172a are the same as the sliding direction of the first movable-side rail 120a, and the second transmission The axial direction of the shaft 160b and the second output part 172b is the same as the sliding direction of the second movable side rail 120b, and the first movable side rail 120a includes the first transmission shaft 160a and the first output part 172a. When positioned at the fertilization work position, opposite ends of each other are engaged with each other so as not to rotate relative to the axis, and the second transmission shaft 160b and the second output portion 172b are connected to the second movable rail 120b. When positioned at the fertilization work position, the opposing end portions are engaged with each other so as not to rotate relative to each other.

  In the present embodiment, a cross-sectionally engaged member 161 having four claw portions 161a protruding outward with respect to the axis is provided at the inner end of the transmission shaft 160 in the vehicle width direction. It has been.

  The output portion 172 includes an engaging member 173 that is slidably fitted in the vehicle width direction on the inner side of a stop member E for preventing the vehicle width direction from coming off in the vehicle in the vehicle width direction. An engagement member 173 having four claw portions 173a extending in the vehicle width direction arranged in parallel along the circumferential direction corresponding to the claw portion 161a of the engaged member 161, and the engagement member 173. A biasing member that biases outward in the vehicle width direction (in this embodiment, the flange portion Q provided on the inner side of the engagement member 173 and an outer portion between the flange portion Q and the engagement member 173). A fitted coil spring S) is provided. Thus, when the first and second movable rails 120a and 120b are positioned at the fertilization work position, the engaged member 161 and the engaging member 173 are engaged, or the first As the second output portions 172a and 172b rotate, the coil spring S is brought into an engaged state, and the first and second transmission shafts 160a and 160b, the first and second output portions 172a and 172b, Can be engaged with each other such that their opposite ends cannot rotate relative to each other about the axis.

  By providing such a configuration, it is possible to engage / shut off power transmission from the drive source 6 to the fertilizer applying device 130 only by sliding the movable rail 120, thereby improving operability. it can.

As shown in FIG. 10, the power transmission mechanism 170 is provided with a clutch mechanism 175 that selectively connects or blocks power transmission from the input unit 171 to the first and second output units 172a and 172b. be able to.
By providing such a clutch mechanism 175, the operation and stop of the whole of the plurality of fertilizer applicators 130 can be easily performed.

  The fertilization unit 100 further includes a manually operable lock mechanism 200 that holds the first and second movable members 1210 and 1220 at the fertilization work position, and the fertilization of the first and second movable members 1210 and 1220. And a positioning mechanism 300 that defines the posture at the work position.

  11 to 14 are diagrams for explaining the configuration of the lock mechanism 200 and the positioning mechanism 300. FIG. 11 shows a schematic front view of the central portion of the fertilizer unit 100, and FIG. 12 shows the fertilizer unit. 100 is a schematic front view of one side portion in the vehicle width direction, FIG. 13 is a schematic front view of the other side portion in the vehicle width direction of the fertilizing unit 100, and FIG. 14 is a schematic view of the central portion of the fertilizing unit 100. A plan view is shown.

  The lock mechanism 200 holds the first and second movable members 1210 and 1220 at the fertilization work position, and is arranged at the center of the work vehicle main machine 1 in the vehicle width direction as shown in FIG. A central locking device 210 provided; a first outer locking device 220 disposed on one side in the vehicle width direction of the work vehicle main unit 1; and a other side in the vehicle width direction of the work vehicle main unit 1. The second outer locking device 230 is provided.

As shown in FIGS. 11 and 14, the central locking device 210 connects the first and second movable members 1210 and 1220 to each other so that both can be held in the fertilization work position. In the present embodiment, a general-purpose type (a so-called patch-on lock) having a central locking engagement member 211 and a central locking engaged member 212 is employed. In the central locking device 210, one of the central locking engaging member 211 and the central locking engaged member 212 (in this embodiment, the engaging member 211) is the first movable member 1210 (this embodiment). In this embodiment, the first movable side front frame 180a (180 ') is provided at the inner end in the vehicle width direction, and the other (engaged member 212 in this embodiment) is the second movable member 1220 (this embodiment). In the embodiment, the second movable side front frame 180b (180 ′)) is provided at the inner end in the vehicle width direction, and the engaging hook of the engaging member 211 is engaged with the engaged portion of the engaged member 212. The first and second movable members 1210 and 1220 are locked by causing the engagement member 211 to be positioned at the lock position about the rotation axis, and the engagement member 211 is released to the release position about the rotation axis. Located in The engagement of the engagement hook of the engagement member 211 in Rukoto is released from the engaged portion of the engaging member 211, coupling lock of the first and second movable members 1210 and 1220 is released Te. Accordingly, the first and second movable members 1210 and 1220 can be locked and unlocked easily, easily and inexpensively. In the present embodiment, the central locking device 210 is disposed on the vehicle front side from the position of the axis P of the first air pipe 150a and the second air pipe 150b (see FIG. 14).

As shown in FIG. 12, the first outer locking device 220 holds the first movable member 1210 at the fertilization work position. In the present embodiment, the first outer locking engagement member A general-purpose type (a so-called patch-on lock) having 221 and a first outer locking engaged member 222 is employed. In the first outer locking device 220, one of the first outer locking engaging member 221 and the first outer locking engaged member 222 (in the present embodiment, the engaging member 22 1). ) Is provided at one end in the vehicle width direction of the first movable member 1210 (in this embodiment, the first movable side front rail 120a (120 ′) and the first movable side rear rail 120a (120 ″)). It is the other (in this embodiment the engaged member 22 2) in the first fixed side rail 110a (this embodiment the first fixed-side front rail 110a (110 ') and said first fixed-side rear Rail 110a (110 ")) is provided on the fixed side roller mounting flange 113, and an engagement hook of the engagement member 221 is engaged with an engaged portion of the engaged member 222 to engage the engagement. Turn member 221 Wherein by positioning the locking position around the axis a first movable member 1210 is the first fixed rail 110a (110 ', 110 ") is locked in the position to release position to the engagement member 221 to pivot axis is allowed by the engagement hook of the engaging member 221 in Rukoto is released from the engaged portion of the engaging member 222, the first fixed side rails 110a of the first movable member 1210 (110 ', 110 ") lock is released to. As a result, the first movable member 1210 and the first fixed rail 110a (110 ′, 110 ″) can be locked and unlocked easily, easily and inexpensively.

As shown in FIG. 13, the second outer locking device 230 holds the second movable member 1220 at the fertilization work position. In the present embodiment, the second outer locking device 230 is a second outer locking engagement member. A general-purpose type (a so-called patch-on lock) having 231 and a second outer locking engaged member 232 is employed. In the second outer locking device 230, wherein the either one (the embodiment of the second outer locking engagement member 231 and the second outer locking the engaged member 232 engaging members 23 1 ) Is provided at one end portion in the vehicle width direction of the second movable member 1220 (in this embodiment, the second movable side front rail 120b (120 ′) and the second movable side rear rail 120b (120 ″)). is the other (in this embodiment the engaged member 23 2) and in the second fixed side rail 110b (this embodiment the second fixed-side front rail 110b (110 ') and said second fixed-side rear Rail 110b (110 ″)) is provided on the fixed-side roller mounting flange 113, and the engagement portion of the engagement member 232 is engaged with an engagement hook of the engagement member 231 to engage the engagement. Turn member 231 Wherein by positioning the locking position around the axis a second movable member 1220 and the second fixed side rail 110b (110 ', 110 ") is locked in the position to release position to the engagement member 231 to pivot axis is allowed by the engagement hook of the engaging member 231 in Rukoto is released from the engaged portion of the engaging member 232, the second fixed-side rail 110b of the second movable member 1220 (110 ', 110 ") lock is released to. As a result, the second movable member 1220 and the second fixed rail 110b (110 ′, 110 ″) can be locked and unlocked easily, easily and inexpensively.

  In the present embodiment, the first and second outer locking devices 220 and 230 are the same as the central locking device 210 and the axis P of the first and second air pipes 150a and 150b, respectively. Is displaced in the circumferential direction. More specifically, as shown in FIG. 18, the first and second outer locking devices 220 and 230 are arranged with reference to the axis P of the first and second air pipes 150a and 150b, respectively. The central lock device 210 and the plurality of lock portions 220 ′ and 230 ′ are provided on the first and second air pipes 150a and 150b. They are arranged at substantially equal intervals in the circumferential direction with respect to the axis P. In the case where the first and second outer locking devices 220 and 230 are each single, the peripheral locking device 210 is connected to the central locking device 210 with respect to the axis P of the first and second air pipes 150a and 150b. It may be displaced by approximately 180 ° in the direction.

  Further, the first and second outer locking devices 220 and 230 in the locking mechanism 200 are arranged so that the work vehicle book is obtained when the first and second movable members 1210 and 1220 are positioned at the fertilization work position, respectively. It is disposed outside the rear wheel 13 of the machine 1 in the vehicle width direction (see FIG. 3).

  The positioning mechanism 300 defines the posture of the movable member 1200 at the fertilization work position, and includes a fixed-side engagement member 310 that is not movable relative to the work vehicle main machine 1, and the movable member. The movable-side engaging member 320 is provided on the movable member 1200 so as to be engaged with the fixed-side engaging member 310 when the 1200 is positioned at the fertilization work position.

  More specifically, as shown in FIG. 12, the fixed-side engagement member 310 has a first outer side that is immovably disposed between the pair of first fixed-side rollers 114a in the vehicle width direction. Fixed-side engaging member (in this embodiment, a positioning member 311 disposed between the pair of first fixed-side rollers 114a and having a positioning hole 311a penetrating along the vehicle width direction, the fixed-side roller As shown in FIG. 13, a positioning member 311) disposed on the mounting flange 113 and a second outer fixed side that is immovably disposed between the pair of second fixed side rollers 114b in the vehicle width direction. An engaging member (in this embodiment, a positioning member 312 having a positioning hole 312a disposed between the pair of second fixed-side rollers 114b and penetrating along the vehicle width direction; And a chromatography La positioning member 312 disposed in the mounting flange 113).

  As shown in FIG. 12, the movable side engaging member 320 is uneven with the positioning hole 311 a in the first outer fixed side engaging member 311 when the first movable member 1210 is positioned at the fertilization work position. A first outer movable engagement member (this embodiment) provided on the first movable member 1210 (in this embodiment, via the support member 321a) so as to be engaged. Then, the positioning pin 321) extending along the vehicle width direction and the positioning at the second outer fixed engagement member 312 when the second movable member 1220 is positioned at the fertilization work position as shown in FIG. A second outer movable side engaging portion provided on the second movable member 1220 (in this embodiment, via the support member 322a) so as to engage with the hole 312a in a concave-convex manner. And a (positioning pin 322 extending along the vehicle width direction in this embodiment).

  As shown in FIG. 14, the movable side engaging member 320 is further provided with a first inward movable side engaging member (this embodiment) provided on the inner end surface in the vehicle width direction of the first movable side frame 180a. In the embodiment, the first positioning pin 323 is provided on a first fixing member 40a ′ that fixes and supports the inner ends of the movable side frame 180 and the movable side rail 120 in the vehicle width direction, and extends along the vehicle width direction. A first positioning pin 323 that extends, and a second inner movable side engaging member (in the present embodiment, the movable side frame 180 and the movable side) provided on the inner end surface in the vehicle width direction of the second movable side frame 180b. A second positioning pin 324 provided on the second fixing member 40b ′ for fixing and supporting the inner end portion of the rail 120 in the vehicle width direction, and extending along the vehicle width direction. The fixed side engaging member 310 is further connected to the first and second inward movable side engaging members 323 and 324 when the first and second movable members 1210 and 1220 are positioned at the fertilization work position, respectively. A center fixed engagement member (in this embodiment, the first and second positioning pins 323 and 324 and the mounting flange 111 having positioning holes 111a and 111b that are engaged with the concave and convex portions, respectively). Yes. The first fixing member 40a ′ is provided with a relief hole 40a ″ penetrating the second positioning pin 324 provided in the second fixing member 40b ′, and the second fixing member 40b ′ has a relief hole 40a ″. Is provided with an escape hole 40b "that penetrates the first positioning pin 323 provided in the first fixing member 40a '.

  FIG. 15 shows an enlarged view of the vicinity of the opposed end portions of the first and second air pipes 150a and 150b in a state where the first and second movable rails 120a and 120b are both positioned at the fertilization work position. Further, in FIG. 16, the first and second movable rails 120a and 120b are moved in the vicinity of the opposed end portions of the first and second air pipes 150a and 150b in a state where they are moved from the fertilizer application position to the maintenance position. An enlarged view is shown.

As shown in FIGS. 15 and 16, in the present embodiment, a pair of first packing member 250 and second packing member having elasticity are provided at opposing ends of the first and second air pipes 150a and 150b. 260 is provided.
FIG. 17 shows a front view of the pair of first and second packing members 250 and 260.

Specifically, in the present embodiment, the opening at the inner end of the first air pipe 150a in the vehicle width direction is provided with a first packing member 250 attached to the first air pipe 150a, and the first packing member. A first packing holding plate 259 for fixing 250 to the first air pipe 150a with a fastening member such as a bolt is provided.
As shown in FIGS. 15 to 17, the first packing member 250 includes a hollow first main body portion 251 that is elastically fitted to the opening end portion of the corresponding air pipe 150 from the outside, and the first main body. A hollow convex portion 255 extending outward from the portion 251 is integrally provided.
Specifically, as shown in FIGS. 16 and 17, the hollow first main body portion 251 includes an outer peripheral portion 252 extending to the outer peripheral surface side of the peripheral wall 151 in the corresponding air pipe 150, and an inner peripheral surface side of the peripheral wall. An inner peripheral portion 253 extending to the outer peripheral portion 252 and a connecting portion 254 that connects the outer peripheral portion 252 and the inner peripheral portion 253, and in a space defined by the outer peripheral portion 252, the inner peripheral portion 253, and the connecting portion 254, The opening end of the corresponding air pipe 150 is inserted.
The hollow convex portion 255 extends outward from the inner peripheral portion 253, and a tip end portion projects through the opening 259 ′ of the first packing pressing plate 259.

On the other hand, a second packing member 260 attached to the second air pipe 150b and the second packing member 260 are connected to the second air pipe at the opening at the inner end of the second air pipe 150b in the vehicle width direction. A second packing presser plate 269 that is fixed to the pipe 150b by a fastening member such as a bolt is provided.
As shown in FIGS. 15 to 17, the second packing member 260 has a hollow second main body portion 261 that is elastically fitted from the outside to the opening end portion of the corresponding air pipe 150.
As shown in FIGS. 16 and 17, the hollow second main body portion 261 includes an outer peripheral portion 262 extending toward the outer peripheral surface side of the peripheral wall 151 in the corresponding air pipe 150, and an inner portion extending toward the inner peripheral surface side of the peripheral wall. It has a peripheral portion 263 and a connecting portion 264 that connects the outer peripheral portion 262 and the inner peripheral portion 263, and air that faces the space defined by the outer peripheral portion 262, the inner peripheral portion 263, and the connecting portion 264 The open end of the pipe 150 is inserted.

The second packing pressing plate 269 has a shape and dimension such that the tip of the hollow convex portion 255 of the first packing member 250 is pressed.
That is, the second packing presser plate 269 includes an opening 269 ′ that communicates with the opening 259 ′ of the first packing presser plate 259, and a contact area 269 ″ surrounding the opening 269 ′. The distal end portion of the hollow convex portion 255 of the first packing member 250 is in pressure contact with the corresponding contact region 269 ″.

  In the present embodiment, by providing such a pair of packing members 250, 260, when the first and second movable-side rails 120a, 120b are positioned at the fertilization work position, the first and second It effectively prevents the pumped air from leaking out from the connecting portions of the air pipes 150a and 150b.

  That is, by providing such a configuration, when the first and second movable rails 120a and 120b are positioned at the fertilization work position, the hollow convex portion 255 of the first packing member 250 is moved to the second packing. The contact area 269 ″ of the holding plate 269 is pressed in an elastically deformed state, thereby effectively preventing the pumped air from leaking out from the connecting portions of the first and second air pipes 150a and 150b. ing.

  In the fertilizer application unit 100 of the present embodiment, the movable rail 120, the movable frame 180, and the fixed rail 110 are configured with a pair of front and rear, but are not limited thereto. You may be comprised with one thing.

  Further, in the fertilization unit 100 of the present embodiment, the fertilization case 135 in the fertilizer application device 130 is configured by the upper case 43, the middle case 42, and the lower case 45, and the upper case 43 and the lower case 45. Is detachably connected to the middle case 42 supported by the support member 180, and the feeding mechanism 136 is detached from the middle case 42 supported by the support member 180 together with the upper case 45. However, for example, when the fertilizing case 135 is constituted by the upper case 43 and the lower case 45, the upper case 43 is detachably connected to the lower case 45 supported by the support member 180. The lower case in which the feeding mechanism 136 is supported by the support member 180 together with the upper case 45 It can be exemplified a case configured to be detached from 5.

  In the fertilizer application unit 100 described above, both the first and second movable members 1210 and 1220 (1200) are positioned at the maintenance position, while the first and second movable members 1210 and 1220 (1200) are disposed on the fertilizer. It can be located at the working position. Specifically, the first and second fertilizer applicators 130a and 130b (130) disposed on one side and the other side in the vehicle width direction with reference to the power transmission mechanism 170 disposed in the center in the vehicle width direction. ), The first and second fertilizer applicators 130a and 130b (130) disposed on one side and the other side in the vehicle width direction when the fertilizer application position is positioned at the maintenance position are respectively And the second movable-side rails 120a and 120b (120) are pulled out to one side and the other side in the vehicle width direction, and disposed on the one side and the other side in the vehicle width direction when being positioned from the maintenance position to the fertilization work position. The first and second fertilizer applicators 130a and 130b (130) are connected to the first and second movable rails 120a and 120b (120, respectively). It is pushed back toward the vehicle width direction the other side and the one side by the.

  Thus, according to the fertilizer application unit 100, the fertilizer applying device 130 can be performed by positioning the movable member 1200 at the maintenance position while enabling the fertilization work by positioning the movable member 1200 at the fertilization work position. It is possible to easily and easily carry out the discharge work of the residual fertilizer and the maintenance work of the fertilizer application.

  Further, when the movable member 1200 is positioned at the maintenance position, the discharge port 133 in the fertilizer applying apparatus 130 ′ located at the innermost side in the vehicle width direction is positioned substantially above the rear wheel 13 of the work vehicle main machine 1. In addition to the fertilizer 130 other than the fertilizer 130 ′ located in the innermost part in the vehicle width direction, the fertilizer 130 ′ located in the innermost part in the vehicle width direction also has an outlet in the fertilizer 130 ′. A work space for discharging the residual fertilizer from 133 can be secured satisfactorily, and the discharge operation can be performed smoothly and reliably. For example, as in the present embodiment, even when the fertilizer application device 130 is disposed between the driver's seat 21 and the seedling stage 33, an operator can use the rear wheel of the work vehicle main machine 1 Therefore, the maintenance work can be performed from the rear of the fertilizer application device 130 without entering the space between 13 and the seedling stage 33, and the maintenance workability can be improved accordingly. Further, in the maintenance position, it is possible to prevent the fertilizer device 130 from being moved excessively outward in the vehicle width direction, thereby realizing a reduction in the maximum vehicle width in the maintenance position, and accordingly, the vehicle width. Regarding the direction, the space required for the movement of the fertilizer application device 130 can be reduced.

  The first and second outer locking devices 220 and 230 in the locking mechanism 200 are more vehicles than the rear wheel 13 of the working vehicle main machine 1 when the movable member 1200 is positioned at the fertilization work position. Since it is arranged outward in the width direction, and the lock operation and the unlock operation by the manual operation of the lock mechanism 200 can be performed respectively in the vehicle width direction outward, the operator can, for example, When getting off the vehicle 1 and moving the movable member 1200 outward in the vehicle width direction, the lock operation 200 can be easily locked and unlocked manually at the moving operation position of the movable member 1200. Can do. Thereby, the effort of the movement operation | movement which an operator moves unnecessarily can be saved.

FIG. 1 is a side view of a rice transplanter to which a fertilization unit according to the present embodiment is applied. FIG. 2 is a schematic left side view including a partial cross section near the fertilizer application unit of the rice transplanter shown in FIG. FIG. 3 is a schematic front view of a fertilizer unit in the rice transplanter shown in FIG. 1 and FIG. 2, and shows a state in which the first and second movable side rails in the fertilizer unit are positioned at the fertilization work position. is there. FIG. 4 is a schematic cross-sectional view mainly showing a fertilizer application part in the fertilizer application unit. FIG. 5 is an exploded perspective view of an essential part of the fertilizer application in the fertilizer unit. FIG. 6 is a perspective view showing a state in which the upper case is connected and held to the middle case by the upper case locking mechanism and the lower case is connected and held to the middle case by the lower case locking mechanism in the fertilizer application. 7 (a) and 7 (b) are front views schematically showing the connection state of the first and second movable side rails connected to the fixed side rail so as to be movable along the vehicle width direction, respectively. FIG. 7C is a schematic cross-sectional view showing an engagement state of the first and second movable side rails with the first and second fixed side rails. FIG. 8 is a front view showing the fertilizing unit in a state where the first and second movable-side rails are positioned at the maintenance position. FIG. 9 (a) shows a perspective view of the attachment state of the first gripping portion provided in the fertilizer application unit as viewed from one side rear in the vehicle width direction, and FIG. 9 (b) shows the first state provided in the fertilizer application unit. The perspective view which looked at the attachment state of 2 grip parts from the vehicle width direction other side front is shown. FIG. 10A is a cross-sectional view of the vicinity of the power transmission mechanism in a state where both the first and second movable side rails are positioned at the fertilization work position, and FIG. 10B is a cross-sectional view of FIG. It is sectional drawing along the V (b) -V (b) line | wire in (a). FIG. 11 is a schematic front view of the central portion of the fertilizer application unit. FIG. 12 is a schematic front view of one side portion of the fertilizing unit in the vehicle width direction. FIG. 13 is a schematic front view of the other side portion of the fertilizing unit in the vehicle width direction. FIG. 14 is a schematic plan view of a central portion of the fertilizer application unit. FIG. 15 is an enlarged front view of the joint portion of the first and second air pipes in the fertilizer application unit, showing the state where the first and second movable rails are located at the fertilization work position. . FIG. 16 is an enlarged front view of a joining portion of the first and second air pipes, and shows a state in which the first and second movable rails are being moved from the fertilizer application position to the maintenance position. FIG. FIG. 17 is a front view of a pair of elastic packing members attached to opposing ends of the first and second air pipes. FIG. 18 is a schematic view of a state in which the first and second outer locking devices are displaced in the circumferential direction from the central locking device with respect to the axes of the first and second air pipes as viewed from the left side. FIG.

DESCRIPTION OF SYMBOLS 1 ... Work vehicle main body 100 ... Fertilizer unit 130 ... Fertilizer 131 ... Fertilizer hopper
131b ... lower end of fertilizer hopper 133 ... connecting pipe 133a ... one end of connecting pipe
133b ... the other end of the connecting pipe 133c ... an intermediate area of the connecting pipe 135 ... a fertilizer case
136 ... Fertilizer feeding mechanism 140 ... Fertilizer blower 200 ... Lock mechanism
1200 ... movable member A ... rice transplanter

Claims (2)

It is a fertilizer unit that can be attached to the working machine of the rice transplanter,
A fertilizer applicator configured to supply fertilizer for storage;
A movable member that supports the fertilizer , a fertilizer work position for operatively connecting the fertilizer to a drive source of the work vehicle main machine, and a maintenance position for positioning the fertilizer to the outside in the vehicle width direction from the fertilizer work position. A movable member capable of relative movement along the vehicle width direction with respect to the work vehicle main unit ,
An air pipe supported by the movable member;
A fertilizer blower for supplying fertilizer pressure blow to the air pipe,
The fertilizer application includes a fertilizer hopper that contains fertilizer, a fertilizer case connected to a lower end opening of the fertilizer hopper, a fertilizer feed mechanism housed in the fertilizer case, and an intermediate between one end and the other end. The connection pipe connected to the lower end opening of the fertilization case below the fertilizer feeding mechanism, the connection pipe having one end fluidly connected to the air pipe and the other end acting as a fertilizer discharge port And
When the movable member is positioned at the maintenance position, the residual fertilizer discharge port of the fertilizer case in the fertilizer apparatus located at the innermost side in the vehicle width direction is positioned substantially above the rear wheel of the work vehicle main unit. fertilization unit, wherein to Rukoto. It is a fertilizer unit that can be attached to the working machine of the rice transplanter,
A fertilizer applicator configured to supply fertilizer for storage;
A movable member that supports the fertilizer, a fertilizer work position for operatively connecting the fertilizer to a drive source of the work vehicle main machine, and a maintenance position for positioning the fertilizer to the outside in the vehicle width direction from the fertilizer work position. A movable member capable of relative movement along the vehicle width direction with respect to the work vehicle main unit,
E Bei and a lock mechanism for holding the movable member in the fertilization working position,
The locking mechanism, when obtained by positioning the movable member in fertilization working position, fertilization unit you characterized in that it is arranged in the vehicle width direction outer side than the rear wheel of the work vehicle the machine.

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