JP4462256B2 - Seedling planting machine - Google Patents

Description

  The present invention relates to a seedling planting machine in which a seedling planting device is mounted on a vehicle body so as to be movable up and down.

There is a seedling planting machine provided with a lifting lever for raising and lowering a seedling planting device with respect to a vehicle body.
JP-A-9-191710

The seedling transplanter adjusts at the end of the seedlings while moving the planting device up and down with respect to the car body while driving on the farm scene and turning the seedling planting transmission clutch on and off. In addition, many operations such as performing seedling replenishment operations are required.
Accordingly, an object of the present invention is to improve operability. Another object of the present invention is to prevent the seedling planting device from being unexpectedly driven or moved up and down when the engine is started.

According to the first aspect of the present invention, the seedling planting device (3) is mounted on the vehicle body (9) that travels by driving the front wheel (13) and the rear wheel (14) via the transmission (11) by the engine (10). In a seedling planting machine configured to transmit the drive of the engine (10) to the seedling planting device (3) by the PTO shaft (17). 11) A lift switch (4U) for raising the seedling planting device (3), a lowering operation of the seedling planting device (3), and the PTO A lowering button (7 ) for operating the PTO clutch (18) for turning on / off the transmission of the shaft (17) is provided, and the grip part (2) is dedicated to lowering for lowering the seedling planting device (3). the lowering button (8), provided separately from the downward button (7), raising switch (4 ), The actuator (24) driven by the operation of the lowering button (7) and the lowering button (8), the rack gear (56) rotating in mesh with the pinion (55) of the actuator (24), and each engagement position The positioning cam (36) whose rotational position is locked by the engagement of the cam roller (38) with the rack gear (56) and the positioning cam (36) are connected to each other by a pin (45) and an elongated hole (46). A positioning floating mechanism (59) that is engaged via the actuator, the actuator (24) is driven to operate the PTO clutch (18) and the elevation control valve (23) via the positioning floating mechanism (59), and the engine switch it is obtained by a seedling planting machine, characterized in that to drive the actuator (24) is configured to switch elevation control valve (23) to the neutral position by the OFF of (50)

According to the first aspect of the present invention, the grip switch (4) of the speed change lever (1) for operating the speed change device (11) is provided with a lift switch (4U) for raising the seedling planting device (3), and a seedling. A lowering button (7) for operating the lowering operation of the planting device (3) and the operation of the PTO clutch (18) for turning on and off the transmission of the PTO shaft (17) is provided. Since the lowering button (8) dedicated to lowering the device (3) is provided separately from the lowering button (7) , the operator can raise and lower the seedling planting device (3) and the seedling planting device ( The operation of the PTO clutch (18) to 3) can be performed, and the operability can be improved.

Further , it is possible to prevent the seedling planting device (3) from being unexpectedly driven or moved up and down when the engine is started.

  The operation device for a mobile agricultural machine according to the present invention can be used for a seedling planting machine, a fertilizer seeding machine, various management work machines to be attached to a tractor, or a combine. In a mobile agricultural machine such as a seedling transplanter, as shown in the figure, the vehicle body 9 travels, the working device 3 that is attached to the vehicle body 9 so as to be movable up and down, and the working device 3 is moved from the vehicle body side 9. It is set as the form which performs each operation | movement with the transmission which carries out a ground work by transmission.

  Here, the vehicle body 9 travels by transmitting the front wheel 13 and the rear wheel 14 via the main transmission of the HST (hydraulic continuously variable transmission) 11 and the auxiliary transmission in the transmission case 12 by driving the engine 10. It is configured to be able to travel. Further, the working device 3 is lifted and lowered by connecting the working device 3 to the rear side of the vehicle body 9 via a lift link 15 and moving it up and down by the expansion and contraction of the lift cylinder 16 to rise to the non-working position or to the ground working position. Can descend. Further, the work device 3 is transmitted from the engine 10 through the PTO shaft 17 and through the PTO clutch 18 that turns on and off the transmission of the PTO shaft 17.

  The HST 11 is shifted by a shift lever 1 provided on the right side of the driver's seat 19. When the speed change lever 1 is operated to the neutral position, the travel transmission is stopped, and the speed change lever 1 is moved forward to the forward high speed state, and from the neutral position to the rearward speed to the reverse high speed state. The forward / reverse speed can be increased or decreased according to the inclination angle of the lever 1.

The auxiliary transmission lever 20 is provided on a dashboard 22 below the steering handle 21.
A lift control valve 23 of a hydraulic circuit that extends and contracts the lift cylinder 16 and a PTO clutch 18 are interlocked via an operation drive mechanism 25 by an actuator 24 such as an electric motor or a stepping motor. The actuator 24 is actuated by an output from the controller 26 by ON / OFF operations of the lift switch 4 and the work switch 5 arranged on the grip portion 2 of the shift lever 1.

  The working device 3 is a multi-planted seedling planting device that accommodates mat-like seedlings and can be fed out while reciprocating to the left and right, and the seedling tanks 27 are fed out. The seedling planting claws 28 for separating the seedlings to be planted on the lower soil surface, the center float 30 and the side float 31 that slide on the soil surface supporting these seedling planting frames 29, and the like. A grounding sensor 32 for detecting the grounding state by the vertical movement of the center float 30 is provided. By the detection of the grounding sensor 32, the lifting / lowering control valve 23 is switched, and the lift cylinder 16 is expanded and contracted. The ground contact height of the seedling planting device 3 is maintained and controlled so as to maintain the seedling planting depth constant.

  Here, since the lifting / lowering switch 4 for raising and lowering the working device 3 and the working switch 5 for performing work transmission are provided on the grip portion 2 of the speed change lever 1, the work device 3 moves from raising and lowering the working device 3 to working transmission. A series of operations can be quickly performed by improving the operability by removing the holding hand from the grip portion 2 or performing a lifting operation or a planting transmission operation while performing a shifting operation.

  Here, by operating the shift lever 1, the vehicle speed of the work implement can be changed by operating the HST 11. The operator operates the ascending switch 4U or the descending switch 4D of the elevating switch 4 while holding the grip portion 2 of the speed change lever 1 to output the actuator 24, and via the operation driving mechanism 25, The lift control valve 23 can be switched to expand and contract the lift cylinder 16, and the work device 3 can be lifted and lowered with respect to the vehicle body 9. Further, when the work switch 5 is operated, the actuator 24 is operated, and the PTO clutch 18 is turned on and off via the operation drive mechanism 25, so that the work device 3 can be transmitted.

  The work switch 5 can be configured independently of the lowering switch 4D of the raising / lowering switch 4, but in the illustrated example, the actuator 24 and the operation driving mechanism 25 are shared with the elevation control valve 23. The work switch 5 can also be shared with the lowering switch 4D. In this case, when the seedling planting device 3 is lowered to a certain working position by the detection of the lift link sensor 33 for detecting the lift position of the lift cylinder 15 or the grounding sensor 32 by the vertical movement of the center float 30. The PTO clutch 18 is actuated so that seedling planting work can be performed.

  The raising / lowering switch 4 has an ascending button 6 that switches between rising and stopping each time it is pressed, and a descending button 7 that switches between descending and descending every time it is pressed, so that each time the ascending button 6 and the descending button 7 are pressed, Since the operation is switched to ascending and stopping, and ascending and descending, respectively, these operations can be performed accurately and easily. Further, the ascending and descending strokes can be maintained for a long time, and the ascending and descending can be promptly performed.

  Here, the ascending switch 4U is turned on by pushing the raising button 6 and the descending switch 4D is turned on by pushing the descending button 7. Each time the lift button 6 is pushed, the lift control valve 23 can be switched via the actuator 24 and the operation drive mechanism 25 to extend the lift cylinder 16 so that the work device 3 can be lifted or stopped. . During the raising operation, the elevation control valve 23 is held at the raised position, and the work device 3 is continuously raised.

  Further, every time the lowering button 7 is pushed in, the lowering switch 4D is turned ON to similarly switch between the lowering of the working device 3 and the lowering stop. At the time of the lowering, the work device 3 is continuously lowered.

  Since the lowering button 7 can switch on / off of work transmission by lowering the working device 3 to the working position, the lowering button 7 can lower the working device 3 as described above. When 3 reaches the work position, the work transmission to the work device 3 is switched between on and off each time the lowering button 7 is pressed, and the work can be performed or stopped. It is possible to switch between work transmission and this transmission stop with the same lowering button 7 for lowering the work device 3, and operability can be improved.

  Since the protruding amount of the ascending button 6 and the descending button 7 is set to be different, the protruding amount in the grip portion 2 of the ascending button 6 and the descending button 7 is different, and the operation feeling between the buttons is different. Thus, it is possible to improve the distinction between the up button 6 and the down button 7 and to reduce erroneous operations.

  Since the ascending button 6 is positioned on the front end side of the grip portion 2 and the descending button 7 is disposed below the ascending button 6, the ascending button 6 is provided on the distal end side of the grip portion 2 of the speed change lever 1, Since the lowering button 7 is disposed on the lower side, the operation is accurately selected in accordance with the same side as the lifting / lowering direction of the work device 3, and erroneous operations can be reduced.

  Since the grip portion 2 has a lowering button 8 that descends by pressing and stops descending when the pressing is released, the grip portion 2 of the speed change lever 1 has a lowering button 8 dedicated to lowering separately from the lowering button 7. Therefore, in the alignment of the start of work at the end of the operation, the lowering of the work device 3 can be switched by the depression and depressing of the lower button 8, and the delicate alignment can be performed. This makes it easy to improve operability.

  Since the lower button 8 is arranged at the rear of the up button 6 and the down button 7, the lower button 8 that is less frequently used is arranged at the rear of the up button 6 and the down button 7, so that an erroneous operation is performed. Can be reduced.

  Here, each of the up button 6, the down button 7 and the down button 8 is arranged on the thumb side of the grip part 2, but is arranged on the opposite side of the child finger or the ring finger and is pushed by the middle finger or the like. It can also be configured to be operable. Further, the up button 6 and the down button 7 can be provided on the thumb side, and the down button 8 can be provided on the opposite side. Further, in order to make the fingertip contact feelings of the buttons 6, 7, and 8 different, the outer shape and the uneven shape of the contact surface can be made different.

Reference numeral 60 denotes an auxiliary seedling mounting frame, which is arranged on both the left and right sides of the dashboard 22 at the front of the vehicle body 9. 61 is a fertilizer applying fertilizer on the soil surface near the seedling planting position of the seedling claw 28.
The operation drive mechanism 25 driven by the actuator 24 drives the lift control valve 23 and the PTO clutch 18 as described above, and can also drive the seedling raising / lowering lever 34 for manual operation on the side of the driver's seat 19. It is configured.

  The rack gear 56 that meshes with the pinion 55 that is the operation drive mechanism 25 is pivotally supported around the shaft 35 provided on the bracket 52 that is an integral member of the vehicle body 9 by the electric power of the actuator 24 by the motor. The shaft 35 is rotatably provided with a positioning cam 36 integrated with a seedling raising / lowering lever 34 which is a manual operation mechanism. A cam roller 38 of a swing arm 37 is slidably fitted on the outer peripheral portion of the positioning cam 36, and the rotation position of the positioning cam 36 can be locked or unlocked in a rotatable state. . Reference numeral 39 denotes a support shaft of the swing arm 37, and reference numeral 40 denotes a spring that elastically pushes the cam roller 38 toward the positioning cam 36.

  The seedling raising / lowering lever 34 is integrally provided with a clutch cam arm 41, and the clutch cam arm 41 presses the cam of the PTO clutch planting clutch (planting clutch) 18 for transmission to the seedling planting device 3. Thus, the PTO clutch 18 can be turned on and off. Further, the seedling raising / lowering lever 34 is provided with a valve arm 42, which can be operated to press the spool of the raising / lowering control valve 23 to switch the lift link 15 from the neutral position to the lowered position or raised position.

  Between the arm 43 of the seedling raising / lowering lever 34 and the arm 44 integrated with the positioning cam 36, a pin 45 constituting a positioning floating mechanism 59 and a long hole 46 for fitting the pin 45 are provided. A pin 45 is fixed to the arm 44, and a long hole 46 is formed in the arm 43. The relative position of the rack gear 56 on the shaft 35 and the positioning cam 36 is engaged through a loose gap formed by the pin 45 and the long hole 46 between the arms 44 and 43, so that the positioning cam with respect to the rack gear 56 is engaged. The rotational position of 36 can be moved back and forth, and the engagement between the positioning cam 36 and the cam roller 38 is engaged at a fixed position. For this reason, the position of the seedling raising / lowering lever 6 is locked at a fixed position by the positioning cam 36 and the cam roller 38, and the hunting of the seedling raising / lowering lever 34 by the control of the motor of the actuator 24 can be prevented.

  At this time, since the cam roller 38 acting on the positioning cam 36 is pressed by the elastic force of the spring 40, the positioning cam 36 driven by the motor of the actuator 24 up to a certain position has a length in which the pin 45 is fitted. Since the rotation is advanced in advance by the backlash of the hole 46, the positioning cam 36 is positioned quickly, and hunting can be prevented more effectively.

  The driving of the operation mechanism by the motor of the actuator 24 is performed by the output from the controller 26. An operation switch, a sensor switch, a control program, and the like are input to the input side of the controller 26. The operation switches include the up / down switch 4, the work switch 5, the lowering switch 8, the switch 48 by operating the finger lever 47, and the control output may be by turning off the engine switch 50, or by a sensor switch. In some cases, the seedling planting device 3 is lowered to detect that it is at the seedling planting position, the grounding sensor 32 by the ground contact of the center float 30, the lift link sensor 33 that detects the lift position of the lift link 15, the back lift input There is a case where the reverse position sensor 49 is entered in the reverse control when the cut lever is entered. An actuator sensor 51 is attached to the bracket 52 to detect the rotational position of the rack gear 56 as the operation position. When the tip of the telescopic arm 53 rotated integrally with the rack gear 56 is engaged with the pin groove of the sensor arm 54 of the actuator sensor 51, the arm 53 is rotated together with the rack gear 56. The combined sensor arm 54 is rotated, and the actuator sensor 51 detects the rotation angle of the rack gear 56.

  The operation by such a seedling raising / lowering lever 34 and the actuator 24 will be described. In the operation by the seedling raising / lowering lever 34, the clutch cam arm 41 and the valve arm 42 are rotated, and the PTO clutch 18 and the raising / lowering control valve 23 are operated. The position can be switched to the attachment position B or the raising position C. At these positions N, A, B, and C, the cam roller 38 is engaged with each engagement position of the positioning cam 36. At this time, the actuator 24 is in a rotatable state, and even if the pinion 55 is rotated by the rotation of the rack gear 56, there is no great resistance. Further, since the actuator sensor 51 is also rotated, the operation position can be input to the controller 26 and displayed on the indicator 58 provided near the speed change lever 1.

  That is, in the neutral position N, the seedling planting device 3 is not lifted and the PTO clutch 18 to the seedling planting device 3 is also in a disconnected state. At the lower planting cut position A, the seedling planting device 3 is lowered, but the PTO clutch 18 is in the cut state and seedling planting cannot be performed. In the lowered planting entry position B, the seedling planting work device 3 is lowered, and the PTO clutch 18 is in the state and seedlings can be planted. Further, at the raising position C, the seedling planting device 3 is raised to the non-seedling position, and the PTO clutch 18 is also in a disengaged state.

  Next, the actuator 24 is actuated to actuate the clutch cam arm 41 and the valve arm 42. The actuator 24 can be operated by operating switches 4, 5, 8, 48, or sensor switches 49, 32. , 33 and 51, and further according to the control output 50. Of these, as an operation switch, when the finger lever 47 is operated, the switch 48 is turned on each time the finger lever 47 is pulled upward, and the actuator 24 is intermittently output from the controller 26. The valve arm 42, the positioning cam 36, and the like are rotated in the upward direction at every pitch by rotating the output by a constant amount. This one pitch is set as each engagement position interval of the cam roller 38 in the positioning cam 36. Conversely, every time the finger lever 47 is pushed down once, the valve arm 42, the positioning cam 36, and the like are rotated in the downward direction at every pitch.

  Next, as a sensor switch, when the back lift on / off lever 57 is operated to the on position, the reverse position sensor 49 detects that the main transmission lever 1 has been operated to the reverse position, whereby the actuator 24 is driven to switch the elevation control valve 23 to the raised position C.

  Further, as a case of control output, by turning off the engine switch 50, the actuator 24 is driven to switch the elevation control valve 23 to the neutral position N, and the seedling planting device 3 is set to the neutral position. Thus, the seedling raising / lowering lever 34 is always in the neutral position N when the engine is started, and it is possible to prevent the seedling planting device 3 from being unexpectedly driven or raised / lowered when the engine is started.

  When the seedling planting device 3 is moved up and down by the grounding of the float grounding sensor 32 and the seedling planting depth is controlled to be constant, since it is performed at the lowered planting position B, the actuator 24 is driven. This is done in a separate route configuration.

  8 mainly differs from the above example in that an up button 6 and a down button 7 for operating the up / down switch 4 are provided on the upper end surface of the grip 2 of the speed change lever 1. Of these, the controller 26 has a program configuration such that when the lowering button 7 is pressed and the ascending button 6 is pressed while the lowering button 7 is pressed, the temporary lowering is stopped and when the lowering button 7 is pressed again, the lowering is performed again. . Further, when the lowering button 7 is pressed and the rising button 6 is continuously pressed twice during the downward movement, the lowering button 7 is raised. In addition, when the raising button 6 is pressed while the temporary lowering is stopped, the raising is made. Further, when the lowering button 7 is pushed down to be lowered and the lowering button 7 is pushed again, the PTO clutch 18 is engaged and the seedling planting operation is performed. 62 is a support shaft of the speed change lever 1, and 63 is an interlocking link with the HST 11.

  In the case of configuring in such an operation mode, it is effective when the seedling planting device 3 is lowered and brought close to the heel and facilitates the operation.

The front view and side view of a transmission lever part. Operation control block diagram. Block diagram of the transmission system. The side view of an operation drive mechanism part. The front view. The top view of a seedling transplanter. The side view. The side view of a different speed-change lever part, and the top view of the grip part.

  DESCRIPTION OF SYMBOLS 1: Shift lever, 2: Grip part, 3: Seedling planting device, 4U: Up switch, 4D: Down switch, 8: Down button, 9: Vehicle body, 10: Engine, 11: Transmission (hydraulic continuously variable transmission) ), 13: front wheel, 14: rear wheel, 17: PTO shaft, 18: PTO clutch, 23: lift control valve, 24: actuator, 36: positioning cam, 38: cam roller, 45: pin, 46: oblong hole, 50: Engine switch, 55: Pinion, 56: Rack gear, 59: Positioning mechanism

Claims (1)

The seedling planting device (3) is driven by the lift control valve (23) on the vehicle body (9) which is driven by driving the front wheels (13) and the rear wheels (14) via the transmission (11) by the engine (10). A shift lever for operating the transmission (11) in a seedling transplanter that is mounted so as to be able to move up and down and transmits the drive of the engine (10) to the seedling planting device (3) by the PTO shaft (17) ( The lift switch (4U) for raising the seedling planting device (3), the lowering operation of the seedling planting device (3) and the transmission of the PTO shaft (17) are inserted into the grip part (2) of 1) lowering buttons to operate the PTO clutch (18) for switching the (7) is provided, the grip portion (2), NaeUe working device (3) lowered only down button for lowering operation (8), falling provided separately from the button (7), raising switch (4U), down button (7) and The actuator (24) driven by the operation of the bald button (8), the rack gear (56) rotating in mesh with the pinion (55) of the actuator (24), and the cam roller (38) are engaged with each engagement position. The positioning cam (36) whose rotation position is locked by doing so, the positioning gear (56), and the positioning cam (36) are engaged by the pin (45) and the long hole (46) through the clearance gap. A mechanism (59), the actuator (24) is driven to actuate the PTO clutch (18) and the elevation control valve (23) via the positioning idler mechanism (59), and the engine switch (50) is turned off to turn the actuator ( 24) A seedling planting machine characterized in that the lift control valve (23) is switched to the neutral position by driving .

Images