JP4617205B2 - Transplanter - Google Patents

Description

  The present invention relates to a transplanter such as a riding rice transplanter.

  Conventionally, a rice paddy machine is known which is a transplanting machine that leaves a normal headland and performs planting while reciprocating the inside of the headland and then travels around the remaining headland (see, for example, Patent Documents 1 and 2). ).

  In the above-mentioned reciprocating planting work, if both ends of each shoot are not aligned, there is a large gap between the seedling planted on the headland during the round planting operation and the seedling planted by the reciprocating planting operation. There was a problem that planting, etc., overlapped with seedlings planted by the traveling, and the efficiency of planting on the field deteriorated.

  On the other hand, the passenger rice transplanter disclosed in Patent Document 1 is provided with a line marker and a trace marker that draw a line as an index for the planting traveling of the next process to the field when planting while reciprocating, and the trace marker is a line drawing marker. When the planting operation is started (when the planting clutch is turned on), the end of the existing shoots and the start of the planting strips are aligned.

  On the other hand, the riding rice transplanter of Patent Document 2 detects the turning angle of the traveling machine body, and when the turning angle exceeds a predetermined value, the planting work machine is lowered, and the lowering of the planting work machine is completed. When the traveling machine body travels a predetermined distance, the planting clutch is automatically turned on and the planting operation is started, so that the end of the existing planted shoot and the start of the planted row are aligned. ing.

The riding rice transplanters of both Patent Documents 1 and 2 allow the operator to align the ends of the seedling rows without looking back.
JP 2003-289702 A JP 2002-335720 A

  In the case of the structure of Patent Document 1, the timing for turning on the planting clutch differs for each worker, and it cannot be said that the positional accuracy between the end of the existing planted shoot and the start of the planted shoot is high. In the case of the structure of Patent Document 2, the positional accuracy between the end of the already planted shoot and the start of the planting ridge is high, but there is a drawback that the structure and control are complicated.

  Therefore, a transplanter that can easily align the end positions of each planting seedling row at the time of planting work is desired with a relatively simple configuration and control without the operator sitting on the seat looking back. It was.

The transplanter of the present invention for solving the above-mentioned problems is a planting machine 1 having a traveling machine body 1 having a driving seat 9 and a planting unit 19 connected to the rear of the seat 9 for planting seedlings in a field. In the transplanter provided with the attached work machine 6 and provided with a pointer pointing to the adjacent seedling row adjacent to the traveling machine body 1 in front of the seat 9, the end of the existing seedling row in the traveling direction of the traveling machine body 1 Controls 12 and 41 that are operated when the pointer indicates the position, and control for stopping the planting drive of the planting work machine 6 after traveling a predetermined distance from the time when the operating tools 12 and 41 are operated. Part 36, and by setting the predetermined distance to the front-rear distance from the planting position X to the pointer by the planting unit 19, by operating the operation tools 12, 41, in a row of seedling planting work, The planting end position is the end of the adjacent seedling row It is the first feature to match the position.

Second, the traveling machine body 1 having a driving seat 9 and the planting work machine 6 having a planting unit 19 connected to the rear of the seat 9 for planting seedlings in a farm field, the seat 9, in a transplanter in which a pointer pointing to an adjacent established seedling row is provided integrally with the traveling machine body 1 in front of 9, the operation is performed when the pointer points to the starting position of the already-planted seedling row in the traveling direction of the traveling machine body 1. that the operating member 12 and 41, after a predetermined distance traveling of the traveling machine body 1 from the operation point of the operation tool 12 and 41, provided a control unit 36 to start the planting operation of the planting work machine 6, the predetermined distance By setting the front and back distance from the planting position X to the pointer by the planting unit 19, the planting start end position is set to the end of the adjacent seedling row in the planting operation of one row of seedlings by the operation of the operation tools 12 and 41. It is characterized by matching with the part position That.

  Third, when the traveling body 1 is planted, the pointer is made of a marker 35 that keeps the intervals between the planted seedlings constant along the adjacent planted seedling rows.

  According to the structure of the present invention configured as described above, the position of the end of each planting seedling row at the time of planting work can be determined with a relatively simple configuration and control without the operator sitting on the seat looking back. There is an effect that they can be easily aligned. In particular, the control unit is configured to stop the planting drive of the planting work machine after traveling a predetermined distance from the operation point of the operation tool operated when the pointer points to the end position of the adjacent existing seedling row, By doing so, there is an advantage that the end position can be aligned with the adjacent seedling row, for example, the end position of the seedling row that has been planted in the previous stroke in the planting operation of one row of seedlings.

  In addition, the planting drive of the planting work machine is started after the traveling machine body has traveled a predetermined distance from the time of operation of the operating tool operated when the pointer points to the start position of the adjacent seedling row in the traveling direction of the traveling machine body. With the configuration, there is an advantage that the start position can be aligned with the adjacent seedling row, for example, the end position of the seedling row that has been planted in the previous stroke, in the planting operation of one row of seedlings.

  And it is not necessary to provide a dedicated pointer by configuring the pointer from a marker that maintains a constant distance between each line of planted seedlings by following the existing planted seedling rows when planting the traveling machine body, Cost increase can be avoided.

  1 and 2 are a plan view and a side view of a riding rice transplanter which is a transplanter adopting the present invention. The traveling machine body 1 is provided with front and rear wheels 2 and 3. A driver's seat 8 is provided behind the hood 7 of the traveling machine body 1. A planting work machine 6 is connected to the rear of the traveling machine body 1 via an elevating link mechanism 4 having an upper link 4a and a lower link 4b.

  A hydraulic cylinder 5 is provided between the lower link 4 b and the traveling machine body 1. The elevating link mechanism 4 moves up and down by the expansion and contraction of the hydraulic cylinder 5. The planting work machine 6 moves up and down as the lifting link mechanism 5 moves up and down.

  A seat 9 is provided in the driver's seat 8 on the rear side. A front operation panel 10 is provided in front of the seat 9. A steering handle 13 protrudes from the front operation panel 10. As shown in FIG. 3, a lifting operation lever 12 is provided so as to protrude from the steering column 11 to one side (right in the present embodiment).

  As will be described later, the planting work machine 6 can be moved up and down and actuated by swinging the lifting operation lever 12 in the vertical direction. The up / down swing lever 12 is electrically detected and output on the up / down operation lever 12 side. As shown in FIG. 4, on the opposite side of the front operation panel 10 with the steering handle 13 of the elevating operation lever 12, a mode changeover switch A15 and a mode changeover switch B20 for operating a planting mode as described later are provided. Is provided.

  By operating the elevating operation lever 12, the planting work machine 6 is lowered so that the float 18 comes in contact with the field scene, and the planting clutch 19 is engaged and operated to drive the planting unit 19 of the planting work machine 6. By traveling the traveling machine body 1 in the field, the planting unit 19 scrapes off the seedling from the seedling stand 21 as the traveling machine body 1 travels, and a planting operation for planting in the field is performed.

  The planting machine 6 moves up and down in a range from a height position at which the float 12 contacts the farm scene to a predetermined maximum height. The operator can fix the position of the planting work machine 6 at an arbitrary height within the lifting range by operating the lifting operation lever 12.

  In front of the seat 9, trace markers 25 made of vertical ridges are provided on both the left and right sides. Each trace marker 25 is attached to a support arm 30 projecting so as to be retractable to the left and right of the traveling machine body 1 so that the height can be adjusted. By causing the traveling body 1 to plant and travel so that the trace marker 25 is close to or slightly in contact with an adjacent existing seedling, the interval between the shoots can be maintained substantially constant.

The aforementioned hydraulic cylinder 5 raises and lowers the planting work machine 6 via the lifting link mechanism 4. Expansion and contraction of the hydraulic cylinder 5 is controlled by a control valve 23 shown in FIG. The control valve 23 is provided with an operation shaft that rotates to switch the state of the control valve 23. The control valve 23 is switched to a plurality of positions according to the range of the rotation angle of the operation shaft, and the state of the hydraulic cylinder 5 is switched.

  The operation shaft of the control valve 23 is rotated through the arm 35 by driving the operation motor 26. The above-mentioned planting clutch is turned on and off by the swing of the operation arm 27 provided in the vicinity of the operation motor 26.

  The operation arm 27 is operated by the cam surface (circumferential surface) of the operation cam 28. The operation cam 28 is rotated by driving the operation motor 26. The rotation of the operation cam 28 and the rotation of the operation shaft are interlocked. As described above, the raising and lowering of the planting work machine 6 and the driving of the planting unit 19 are controlled by the rotation control of the operation motor 26.

  At the fixed position of the control valve 23 that stops the flow of pressure oil to the hydraulic cylinder 5 and the flow of pressure oil from the hydraulic cylinder 5 to the oil tank, the expansion and contraction of the hydraulic cylinder 5 is locked, and the planting work machine 6 has a predetermined height. It becomes a fixed state at.

  At the raised position of the control valve 23 for sending the pressure oil to the hydraulic cylinder 5 side, the hydraulic cylinder 5 is extended and the planting work machine 6 is raised. Pressure oil from the hydraulic cylinder 5 can be returned to the oil tank. When the control valve 23 is automatically lowered and retracted by the grounding of the float 18 based on feedback from the planting work machine 6 side, The auxiliary work machine 6 is in a lowered / automatic state.

  When the planting work machine 6 is in the lowered / automatic state, the hydraulic cylinder 5 is contracted by the dead weight of the planting work machine 6 when the float 18 is not in contact with the ground, and the float 18 is grounded and lowered from the lowered state. When stopped, it automatically enters an automatic state that can follow the field scene. By driving the operation motor 26 in the descending / automatic state of the planting work machine 6 that has stopped descending to bring the planting clutch into an engaged state, the planting unit 19 side starts to be driven. It becomes a planting state.

  As shown in FIG. 6, the operation motor 26 is connected to the output side of a control device 36 having a microcomputer unit. On the input side of the control device 36, the lifting / lowering operation lever 12, the mode change-over switch A 15, the mode change-over switch B 20, the potentiometer 37 for detecting the rotation angle of the operation cam 28, and a rotation sensor for detecting the travel distance. 38 and a planting work preparation switch 39 to be pressed in advance when performing the planting work.

  Since the rotation angle of the operation shaft of the control valve 23 corresponds to the rotation angle of the operation cam 28, the position of the control valve 23 and the on / off state of the planting clutch are detected by the potentiometer 37, and the operation of the planting unit 19 is controlled. The state of the planting work machine 6 included can be detected.

  The rotation sensor 38 is installed so as to detect the rotation speed of the propeller shaft that transmits the driving force to the rear axle. The rotation sensor outputs a pulse as the propeller shaft rotates. The travel distance can be detected by the number of pulses.

  On the control device 36 side, an elevating drive program for controlling the elevating and driving of the planting work machine 6 by driving the operation motor 26 is provided. The control device 36 functions as a lifting drive means for controlling the lifting and driving of the planting work machine 6 by operating based on the lifting drive program.

  As shown in the flowchart of FIG. 7, the raising / lowering drive control of the planting work machine 6 by the raising / lowering driving means first checks in step S1 whether or not the raising / lowering operation lever 12 is raised or lowered.

  When the raising operation of the raising / lowering operation lever 12 is detected in step S1, it progresses to step S2 and the state of the planting work machine 6 is checked. If the planting machine 6 is in the raised state in step S2, the process returns. When the planting work machine 6 is not in the raised state in step S2, the process proceeds to step S3, and the state of the planting work machine 6 is checked again.

  When the planting work machine 6 is in the fixed state in step S3, the process proceeds to step S4, the operation motor 26 is driven, the control valve 23 is set to the raised position, the planting work machine 6 is switched to the raised state, and then the process returns. If the planting work machine 6 is in a state other than the fixed state in step S3, the process proceeds to step S5, and the state of the planting work machine 6 is checked again.

  When the planting work machine 6 is in the lowered / automatic state in step S5, the process proceeds to step S6, and it is checked whether or not the planting work machine 6 has stopped the lowering operation. When the descending operation of the planting work machine 6 is stopped in step S6, the process proceeds to step S4, the operation motor 26 is driven, the control valve 23 is set to the raised position, and the planting work machine 6 is switched to the raised state. Then return.

  If the descent operation of the planting work machine 6 is not stopped in step S6, the process proceeds to step S7, the operation motor 26 is driven, the control valve 23 is set to the fixed position, and the planting work machine 6 is switched to the fixed state. Then return.

  If the planting work machine 6 is in the planting state in step S5, the process proceeds to step S8, where the mode changeover switch A is checked (ON / OFF). If the mode switch A15 is OFF, the process proceeds to step S9, the control valve 23 is lowered to the automatic position, and the planting clutch is operated by the operation cam 28 to move the planting work machine 6 to the lowered / automatic state. Switch, then return.

  In step S8, when the mode changeover switch A15 is ON, the process proceeds to step S10, and the number of pulses of the rotation sensor 38 from the time when the lifting operation lever 12 is raised in step S1 is checked. If the number of pulses from the rotation sensor 38 does not exceed a predetermined number, that is, if the travel distance from the point of time when the elevating operation lever 12 is raised does not reach a predetermined specified distance, the process returns. .

  In step S10, if the number of pulses from the rotation sensor 38 exceeds a predetermined number, that is, if the travel distance from the time when the lifting operation lever 12 is raised reaches the specified distance, the process proceeds to step S11. The process proceeds to check whether the mode switch B20 is turned on or off (ON, OFF).

  If the mode switch B20 is ON in step S11, the process proceeds to step S12, the control valve 23 is set to the raised position, the planting clutch is operated by the operation cam 28, and the planting work machine 6 is switched to the raised state. Then return.

  If the mode changeover switch B20 is OFF in step S11, the process proceeds to step S13, the control valve 23 is set to the automatic / lowering position, the planting clutch is disengaged by the operation cam 28, and the planting work machine 6 is automatically Switch to the descent state and then return.

  On the other hand, when the lowering operation of the elevating operation lever 12 is detected in step S1, the process proceeds to step S14 to check on / off (ON, OFF) of the planting work preparation switch 39. If the planting work preparation switch 39 is ON, the process proceeds to step S15, and the state of the planting work machine 6 is checked.

  In step S15, when the planting work machine 6 is in the raised state, the process proceeds to step S16, the operation motor 26 is driven, the control valve 23 is set to the fixed position, the planting work machine 6 is switched to the fixed state, and then the process returns. . When the planting work machine 6 is in a state other than the raised state, the process proceeds to step S17, and the state of the planting work machine 6 is checked again.

  When the planting work machine 6 is in the fixed state in step S17, the process proceeds to step S18, the operation motor 26 is driven, the control valve 23 is set to the lowering / automatic position, and the planting work machine 6 is switched to the lowering / automatic state. Then return.

  When the planting work machine 6 is in the lowered / automatic state in step S17, the process proceeds to step S19, and the mode changeover switch A15 is checked (ON / OFF). If the mode switch A15 is ON, the process proceeds to step S20, and the number 38 of pulses of the rotation sensor from the time when the lifting operation lever 12 is lowered in step S1 is checked.

  In step S20, when the number of pulses from the rotation sensor 38 does not exceed a predetermined number, that is, when the traveling distance from the time when the lifting operation lever 12 is lowered does not reach a predetermined specified distance. Will return.

  In step S20, if the number of pulses from the rotation sensor 38 exceeds a predetermined number, that is, if the travel distance from the time when the lifting operation lever 12 is lowered reaches the specified distance, the process proceeds to step S21. Then, the planting clutch is engaged and operated by the operation cam 28, the planting machine 6 is switched to the planting state, and then the process returns.

  In step S19, when the mode changeover switch A15 is OFF, the process proceeds to step S22, and it is checked whether or not the planting work machine 6 has stopped the lowering operation. If the lowering operation of the planting work machine 6 is stopped in step S22, the process proceeds to step S23, the planting clutch is engaged and operated by the operation cam 28, the planting work machine 6 is switched to the planting state, and then the process returns. To do. If the lowering operation of the planting work machine 6 is not stopped in step S22, the process proceeds to step S24, the system is set in a planting clutch waiting state, and the process returns.

  If the planting work preparation switch 39 is OFF in step S14, the process proceeds to step S25, and the state of the planting work machine 6 is checked. When the planting work machine 6 is in the raised state in step S25, the process proceeds to step S16, the operation motor 26 is driven, the control valve 23 is set to the fixed position, the planting work machine 6 is switched to the fixed state, and the process returns.

  In step S25, when the planting work machine 6 is in a state other than the raised state, the process proceeds to step S26, and the state of the planting work machine 6 is checked again. When the planting work machine 6 is in the fixed state in step S26, the process proceeds to step S27, the operation motor 26 is driven, the control valve 23 is set to the lowered / automatic position, the planting work machine 6 is switched to the lowered state, and the process returns. . If the planting machine 6 is in a state other than the fixed state, the process returns as it is.

  In step S1, when the raising / lowering operation of the raising / lowering operation lever 12 is not detected, it progresses to step S28 and it is checked whether a system is a planting clutch waiting state. When the system is in the planting clutch waiting state in step S28, the process proceeds to step S29, and it is checked whether or not the planting work machine 6 has stopped the lowering operation.

  If the descending operation of the planting work machine 6 is stopped in step S29, the process proceeds to step S30, the planting clutch is engaged and operated by the operation cam 28, the planting work machine 6 is switched to the planting state, and then the process returns. To do. If the system is not waiting for the planting clutch in step S28, the process returns if the lowering operation of the planting work machine 6 is not stopped in step S29.

  As described above, when the mode changeover switch A15 is turned ON and the elevating operation lever 12 is operated to be raised when the planting work machine 6 is in the planting state, the planting machine 6 travels a specified distance after the elevating operation lever 12 is raised. The attached clutch is disengaged and planting work is stopped. At this time, if the mode changeover switch B20 is ON, the planting clutch 6 is disengaged and the planting work machine 6 is raised. However, when the mode switch B20 is OFF, the planting clutch is disengaged, and the planting work machine 6 is maintained in the automatic / lowering state.

  When the mode selector switch A15 is turned OFF, when the lifting operation lever 12 is raised when the planting work machine 6 is in the planting state, the planting clutch is disengaged when the lifting operation lever 12 is raised, The work machine 6 is switched to the lowered / automatic state. When the planting work machine 6 is lowered and automatically stopped due to grounding of the float 18 or when the planting work machine 6 is fixed at a predetermined height, the lifting operation lever 12 is operated to be raised. The planting machine 6 starts to rise.

  If the lifting operation lever 12 is raised while the planting work machine 6 is being lowered, the planting work machine 6 is fixed at the height when the lifting operation lever 12 is raised. Even if the raising / lowering operation lever 12 is raised while the planting work machine 6 is raised, the planting work machine 6 continues to rise.

  In addition, when the planting work preparation switch 39 is turned on and the mode switch A15 is turned on, when the lifting operation lever 12 is lowered when the planting work machine 6 is in the lowered / automatic state, the lifting operation lever 12 The planting clutch is engaged after traveling a specified distance from the time point 12 and the planting operation is started.

  When the planting work preparation switch 39 is turned on and the mode change-over switch A15 is turned off, the lifting / lowering operation is performed when the planting work machine 6 is stopped in the lowered / automatic state due to the grounding of the float 18 or the like. When the lever 12 is lowered, the planting clutch is engaged at the time when the lifting operation lever 12 is lowered, and the planting operation is started. However, if the elevating operation lever 12 is lowered while the planting machine 6 is being lowered, the planting clutch is engaged and planting work is started at the same time that the lowering is stopped by the grounding of the float 18.

  When the planting work preparation switch 39 is OFF, the planting work machine 6 is not switched to the planting state. When the planting work machine 6 is fixed at a predetermined height, when the lifting operation lever 12 is lowered, the planting work machine 6 starts to descend. When the elevating operation lever 12 is operated to be lowered while the planting work machine 6 is being lifted, the planting work machine 6 is fixed at the height when the elevating operation lever 12 is lowered.

  Next, the planting work mode by this riding rice transplanter will be described. The planting work preparation switch 39 is turned on in advance, and as shown in FIG. 8, when starting the first stroke of the reciprocating planting run, the headland can be planted in a predetermined width (for example, in two strokes). The planting is started from the position A where the width is left, and the planting of the first step is completed at the B position where the headland is left at the predetermined width.

  Then, the traveling body 1 is turned 180 degrees so that the trace marker 35 comes close to or slightly in contact with the adjacent existing shoots planted in the previous stroke, and the adjacent existing shoots and the current planted seedlings are planted. The planting travel is started while maintaining a constant interval with the planting, the planting travel is performed in the next stroke, and the above operations are repeated to perform the reciprocating planting operation. Then, the remaining headland is planted and run around.

  The above-mentioned prescribed distance is the front-rear distance from the position of the trace marker 35 to the planting position X by the planting unit 19. For this reason, at the time of planting traveling in the next step, the mode changeover switch is located at a position C indicating that the trace marker 35 is located directly beside the seedling at the end of planting of the adjacent existing shoots planted in the previous stroke. In the environment where A15 is ON, when the lifting operation lever 12 is swung downward, the traveling machine 1 travels without performing planting work until the seedling starts to be planted from right next to the seedling at the end of the above-mentioned planted shoot. To do.

  In the environment where the mode change-over switch A15 is turned on at the position D at which the trace marker 35 is located immediately beside the seedling at the beginning of planting of the adjacent already-planted shoot planted in the previous stroke and indicates the seedling, the raising / lowering operation is performed. When the lever 12 is swung upward, the traveling machine body 1 is planted and traveled until the seedling at the end of planting is planted directly beside the seedling at the beginning of planting the already-planted shoots.

  Therefore, in the above-described reciprocating planting operation, the mode changeover switch A15 is set to ON, and as shown in C in FIG. 8, the trace marker 35 is directly beside the seedling at the end of planting of the adjacent existing shoots planted in the previous stroke. When the raising and lowering operation lever 12 is swung downward when the seedling is pointed and positioned, planting is started from the point in time when the traveling machine body 1 is positioned at C ′, and the planting of the adjacent existing shoots is completed. Seedlings can be planted right next to them.

  Further, the mode changeover switch A was turned on, and as shown in D in FIG. 6, the trace marker 35 was positioned right next to the seedling at the beginning of the adjacent existing shoot planted in the previous stroke and pointed to the seedling. When the lifting operation lever 12 is swung upward, the planting is continued until the traveling machine body 1 is positioned at D ′, and the seedling at the end of planting is planted next to the seedling at the beginning of the adjacent existing shoot. wear.

  As a result, the operator sitting on the seat 9 does not look back by the reciprocating planting work, and the planting start and planting end positions of the shoots to be planted are aligned by simple structure and control. There is a large gap between the planted seedlings and the seedlings planted by the reciprocating planting operation, and inconveniences such as overlapping with the seedlings already planted by the reciprocating planting operation are prevented, and the efficiency of planting on the field is reduced. improves.

  In addition, since the trace marker 35 is also used as a pointer that points to an adjacent seedling row, it is not necessary to prepare a dedicated pointer, and an increase in cost can be suppressed.

  On the other hand, as shown in FIG. 9, a planting switch 41 that operates planting different from the lifting operation lever 12 may be provided on the steering handle 13. In this case, as shown in FIG. 10, the above-described mode change-over switch A15 can be omitted, and a mode change-over switch B20 may be provided on the front operation panel 10. As shown in FIG. 11, a planting switch 41 is connected to the input side of the control device 36.

  In the present embodiment, the traveling machine body 1 is equipped with a CVT continuously variable transmission. The rotation sensor 38 is arranged to detect the output rotation of the CVT continuously variable transmission. As shown in FIG. 12, since the driving force is transmitted from the output pulley 42 of the CVT continuously variable transmission to the input pulley 43 of the transmission by the belt 44, the rotation sensor 38 detects the rotation speed of the input pulley 43. It is configured as follows.

  As described above, by detecting the rotation speed of the input pulley 43 to the transmission which is not easily affected by the CVT continuously variable transmission on the upstream side of the transmission by the rotation sensor 38, a relatively high rotation is detected. The number of pulses output with respect to the travel distance is increased, and the measurement error of the travel distance is reduced with a simple and low-cost configuration.

  The configuration for detecting the number of rotations by the rotation sensor 38 may be employed in the above-described embodiment. In addition, the other structure of this embodiment shown by FIGS. 9-12 is according to FIGS. 1-6, and the same code | symbol is the same structure as the above-mentioned embodiment, and omits description about the same function.

  On the control device 36 side, a planting switch drive program for controlling the raising and lowering and driving of the planting work machine 6 by driving the operation motor 26 based on the operation of the planting switch 41 is provided in advance. As a result, the control device 36 operates based on the planting switch drive program, thereby functioning as a lifting drive means for controlling the lifting and driving of the planting work machine 6 based on the operation of the planting switch 41.

  The raising / lowering drive control of the planting work machine 6 by this raising / lowering drive means checks the presence or absence of operation of the planting switch 41 in step S1, as shown by the flowchart of FIG. When the planting switch 41 is operated, the process proceeds to step S2 to check the state of the planting work machine 6.

  When the planting work machine 6 is not in the raised state in step S2, the process proceeds to step S3, and the state of the planting work machine 6 is checked again. In step S3, when the planting work machine 6 is in a state other than the fixed state, the process proceeds to step S4, and the number of pulses of the rotation sensor 38 from the operation point of the planting switch 41 in step S1 is checked. If the number of pulses from the rotation sensor 38 does not exceed a predetermined number, that is, if the travel distance from the operation point of the planting switch 41 does not reach a predetermined specified distance, the process returns.

  In step S4, if the number of pulses from the rotation sensor 38 exceeds a predetermined number, that is, if the travel distance from the time when the planting switch 41 is operated reaches the specified distance, the process proceeds to step S5. The state of the planting work machine 6 is checked.

  When the planting work machine 6 is in the lowered / automatic state in step S5, the process proceeds to step S6, the planting clutch is engaged and operated by the operation cam 28, the planting work machine 6 is switched to the planting state, and then the process returns.

  In step S5, when the planting work machine 6 is in the planting state, the process proceeds to step S7, and whether the mode changeover switch B20 is turned on or off is checked. If the mode switch B20 is ON, the process proceeds to step S8, the control valve 23 is set to the raised position, the planting clutch is disengaged by the operation cam 28, and the planting work machine 6 is switched to the raised state. To do.

  If the mode changeover switch B20 is OFF in step S7, the process proceeds to step S9, the control valve 23 is set to the automatic / lowering position, and the planting clutch is disengaged by the operation cam 28 to automatically operate the planting work machine 6. Switch to the descent state and then return.

  When the planting switch 41 is operated (pressed) from the descending / automatic state of the planting work machine 6 with the float 18 in contact with the ground in order to start the planting operation (drive the planting unit 19) as described above, the planting switch The planting clutch is engaged after traveling a specified distance from the operation point 41, and planting work is started.

  In addition, when the planting switch 41 is operated (pressed) from the planting state of the planting work machine 6 to stop the planting operation (the planting unit 19 is stopped), if the mode switch B20 is ON, When the attached clutch is disengaged and the planting operation is stopped, the planting work machine 6 is raised, and when the mode switch B20 is OFF, the planting clutch is disengaged and the planting operation is stopped. The machine 6 is maintained in the automatic / descent state.

  Thereby, when performing the planting work by the reciprocating planting work as described above, when the trace marker 35 points to the seedling positioned right next to the seedling at the end of planting of the adjacent existing shoots planted in the previous stroke, When the trace marker 35 points to the seedling that is positioned immediately beside the initial seedling of the adjacent existing shoot planted in the previous stroke, the planting switch 41 is used to start and stop planting operations. By doing so, the planting start and planting end positions of each shoot planted in the same manner are aligned, and there is a large gap between the seedling planted on the headland during the round planting run and the seedling planted by the reciprocating plant run, Inconveniences such as planting overlapping with seedlings already planted by reciprocating planting are prevented, and planting efficiency on the field is improved.

In any of the above-described embodiments, the state of the planting work machine 6 at the time when the planting of one row of seedlings is planted is selected to either rise or maintain the planting height by operating the mode changeover switch B20. Can do. Thereby, according to farm field conditions or work conditions, the state of the planting work machine 6 can be easily selected from any of the above, and workability is improved.

It is a top view of a riding rice transplanter. It is a side view of a riding rice transplanter. It is a perspective view of a steering handle part. It is a top view of a front operation panel part. It is a side view of a control valve part. It is a block diagram around a control device. It is a flowchart figure of raising / lowering drive control. It is a plane schematic diagram which shows a planting work form. It is a top view of the riding rice transplanter of other embodiment. It is a top view of the front operation panel part of other embodiments. It is a block diagram around the control device of another embodiment. It is a side view of the riding rice transplanter of other embodiment. It is a flowchart figure of the raising / lowering drive control of other embodiment.

Explanation of symbols

1 traveling machine body 6 planting work machine 9 seat 12 elevating operation lever (operating tool)
19 planting part 35 Trace marker (marker)
36 Control device (control unit)
41 Planting switch (operating tool)
X planting position

Claims (3)

A traveling machine body (1) having a driving seat (9) and a planting work machine (6) having a planting part (19) connected to the rear of the seat (9) for planting seedlings in a farm field. In the transplanter provided integrally with the traveling machine body (1) in front of the seat (9), the pointer indicating the adjacent existing seedling array is provided in the traveling machine body (1) in the traveling direction of the traveling machine body (1). The operation tools (12) and (41) operated when the pointer points to the end position of the vehicle, and after traveling a predetermined distance from the time when the operation tools (12) and (41) are operated, A control unit (36) for stopping the planting drive of the attachment work machine (6), and setting the predetermined distance to the front-rear distance from the planting position (X) by the planting unit (19) to the pointer. Accordingly, the operating member (12), by the operation of (41), when planting seedlings of a row Oite, transplanter to match the end position of the adjacent seedling rows planting end position. A traveling machine body (1) having a driving seat (9) and a planting work machine (6) having a planting part (19) connected to the rear of the seat (9) for planting seedlings in a farm field. In the transplanter provided integrally with the traveling machine body (1) in front of the seat (9), the pointer indicating the adjacent existing seedling array is provided in the traveling machine body (1) in the traveling direction of the traveling machine body (1). The operation tools (12) and (41) operated when the pointer points to the starting end position of the vehicle, and after traveling a predetermined distance from the operation time of the operation tools (12) and (41), the planting body (1) is planted. A control unit (36) for starting the planting drive of the attachment work machine (6), and setting the predetermined distance to a front-rear distance from the planting position (X) by the planting unit (19) to the pointer. Accordingly, the operating member (12), by the operation of (41), when planting seedlings of a row Oite, transplanter to match the end position of the adjacent seedling rows planting starting end position.   The transplant according to claim 1 or 2, wherein the pointer comprises a marker (35) for maintaining a constant distance between the individual lines of the planted seedlings by following the adjacent existing seedling rows when planting the traveling machine body (1). Machine.

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