WO2020136937A1 - Paddy field work machine - Google Patents

Paddy field work machine Download PDF

Info

Publication number
WO2020136937A1
WO2020136937A1 PCT/JP2019/019845 JP2019019845W WO2020136937A1 WO 2020136937 A1 WO2020136937 A1 WO 2020136937A1 JP 2019019845 W JP2019019845 W JP 2019019845W WO 2020136937 A1 WO2020136937 A1 WO 2020136937A1
Authority
WO
WIPO (PCT)
Prior art keywords
operated
marker
operating
control valve
lifting
Prior art date
Application number
PCT/JP2019/019845
Other languages
French (fr)
Japanese (ja)
Inventor
柴原藍
Original Assignee
株式会社クボタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社クボタ filed Critical 株式会社クボタ
Priority to CN201980077061.9A priority Critical patent/CN113163711B/en
Priority to KR1020217014455A priority patent/KR20210103461A/en
Publication of WO2020136937A1 publication Critical patent/WO2020136937A1/en

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
    • A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
    • A01B63/102—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means characterised by the location of the mounting on the tractor, e.g. on the rear part
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
    • A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B69/00—Steering of agricultural machines or implements; Guiding agricultural machines or implements on a desired track
    • A01B69/02—Ridge-marking or like devices; Checkrow wires; Accessories therefor
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C11/00—Transplanting machines
    • A01C11/02—Transplanting machines for seedlings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C11/00—Transplanting machines
    • A01C11/02—Transplanting machines for seedlings
    • A01C11/025—Transplanting machines using seedling trays; Devices for removing the seedlings from the trays
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2

Definitions

  • the present invention relates to a configuration for lifting and lowering a working device in a paddy working machine such as a riding type rice transplanter and a riding type direct seeding machine.
  • a seedling planting device is supported by a machine body so as to be able to move up and down, and a hydraulic cylinder that operates the seedling planting device to move up and down.
  • a hydraulic cylinder that operates the seedling planting device to move up and down.
  • the seedling planting device is provided with a planting clutch capable of transmitting and shutting off power, and the raising and lowering operation lever operates the planting clutch to the transmission position and the shut-off position, whereby the seedling planting device operates and stops.
  • Patent Document 1 a float that is supported by the seedling planting apparatus so as to be able to move up and down and that follows the ground contact with the rice field is provided, and a wire is connected across the control valve and the float.
  • the height of the seedling planting device with respect to the float is mechanically transmitted to the control valve via the wire, and the control valve is automatically operated by the float and the wire so that the seedling planting device is maintained at the set height from the rice field. Operated.
  • the seedling planting depth of the seedling planting device is maintained at the set planting depth.
  • Patent Document 1 when a worker operates an elevating operation lever, the elevating operation lever operates a control valve to a neutral stop position, an ascending operation position, and a descending operation position, and an elevating operation lever causes a work clutch to a transmission position and a disengagement position. Operated in position. In this case, since the operation stroke of the elevating operation lever is large, there is room for improvement in terms of operability.
  • the present invention is intended to improve the operability of a control valve in a paddy work machine, and to improve the operability of a work clutch capable of transmitting and disconnecting power to a work device.
  • the paddy work machine of the present invention includes a work device supported by a machine body so as to be able to move up and down, a work clutch capable of transmitting and shutting off power to the work device, a hydraulic cylinder for operating the work device up and down, and a hydraulic cylinder.
  • a control valve for supplying/discharging hydraulic oil to operate the hydraulic cylinder, and an elevating/lowering mechanism for operating the control valve to maintain the working device at a set height from a field are provided.
  • a lifting actuator that can operate the work clutch, an operation tool that can be artificially operated, and a lifting control unit that operates the lifting actuator based on the operation of the operation tool, and the lifting control unit is
  • the operating tool is operated to the raised position
  • the work clutch is operated to the disengaged position
  • the control valve is operated to and maintained at the raised operating position in preference to the elevating and lowering mechanism.
  • the lifting actuator is operated.
  • the control valve when the control valve is operated by the elevator linkage mechanism and the operating device is operated to the elevated position in the state where the working device is maintained at the set height from the rice field, based on the operation of the elevator actuator,
  • the work clutch is operated to the disengagement position, the control valve is operated to the raising actuation position in preference to the raising/lowering linkage mechanism, and the working device is raised. Even if the operating tool is not maintained in the raised position after being operated in the raised position, the work clutch is maintained in the disengaged position and the control valve is maintained in the raised operation position based on the operation of the lifting actuator.
  • the ascent operation is continued.
  • the control valve is operated to the raising operation position and the work clutch is operated to the disengagement position based on the operation of the elevating actuator by the operation of the operation tool.
  • the elevating controller when the operation tool is operated to the descending position, the elevating controller is maintained in a state in which the work clutch is operated to the disengaged position and the control valve is operated by the elevating and lowering linkage mechanism.
  • the lifting actuator it is preferable to operate the lifting actuator.
  • the working clutch is operated (maintained) to the disengaged position based on the operation of the lifting actuator, and the control valve is operated by the lifting linkage mechanism. To be done.
  • the control valve When the control valve is operated by the elevating and lowering linkage mechanism in a state where the work device is lifted from the field, the control valve is operated to the lowering operation position by the elevating and lowering linkage mechanism, and the working device is lowered. Even if the operating tool is not maintained in the lowered position after being operated in the lowered position, the work clutch is maintained in the disengaged position based on the operation of the lifting actuator, and the state in which the control valve is operated by the lifting linkage mechanism is maintained. Therefore, the descending operation of the working device is continued.
  • the elevator valve mechanism When the work device descends and reaches the position of the set height from the rice field, the elevator valve mechanism operates the control valve to the neutral stop position to stop the descending operation of the work device. After that, the control valve is operated by the elevating and lowering mechanism, and the working device is maintained at the set height from the rice field.
  • the control valve is operated to the ascending operation position and the descending operation position and the work clutch is operated to the disengagement position based on the operation of the elevating actuator by the operation of the operation tool.
  • the elevating controller controls the work while maintaining a state in which the control valve is operated by the elevating linkage mechanism. It is preferable to operate the lifting actuator so that the clutch is operated to the transmission position.
  • the operating tool when the operating tool is operated to the descending position and then to the descending position again, the work is performed while the control valve is maintained to be operated by the elevating mechanism based on the operation of the elevating actuator.
  • the clutch is operated to the transmission position, and the work by the work device is started.
  • the control valve is operated to the ascending operation position and the descending operation position and the work clutch is operated to the transmission position and the disengagement position based on the operation of the elevating actuator by the operation of the operation tool.
  • an upper limit position detection unit that detects that the work device is lifted is provided at an upper limit position of a lifting range of the work device, and the lift control unit includes the upper limit position detection unit to limit the work device to the upper limit. It is preferable that the lift actuator is operated so that the control valve is operated to the neutral stop position in preference to the lift linkage mechanism when it is detected that the lift valve has been lifted to the position.
  • the control valve based on the operation of the lifting actuator, the control valve is maintained in the lifted operating position, and when the working device is lifted, when the working device reaches the upper limit position, based on the operation of the lifting actuator, The control valve is operated to the neutral stop position in preference to the elevator linkage mechanism.
  • a lower limit position detection unit that detects that the working device is lowered is provided at a lower limit position of an elevating range of the working device, and the elevating and lowering control unit includes the lower limit position detection unit to limit the working device to the lower limit. It is preferable to operate the lift actuator such that the control valve is operated to the neutral stop position in preference to the lift linkage mechanism when it is detected that the lift actuator is lowered to the position.
  • the elevator actuator is activated. Based on this, the control valve is operated to the neutral stop position with priority over the lifting and lowering linkage mechanism.
  • a float that is supported by the working device so as to be able to move up and down, and that follows the ground contact with the rice field, is provided over the control valve and the float, and the height of the working device with respect to the float is controlled by the control valve. It is preferable that the lifting and lowering linkage mechanism is provided to maintain the working device at the set height from the rice field by operating the control valve.
  • the height of the working device with respect to the float is mechanically transmitted to the control valve by the lifting and lowering linkage mechanism, and the control valve is operated to set the working device from the rice field in a state where the float follows the ground contact with the paddy field. Maintained at height.
  • the control valve Since the float is descending with respect to the work device when the work device is raised from the field, when the control valve is operated by the elevating and lowering mechanism, the control valve is operated to the lowering operation position by the elevating and lowering mechanism. The working device is lowered.
  • the float When the work equipment descends and the float touches the rice field, the float rises with respect to the work equipment.When the work equipment reaches the set height position from the rice field, the elevator linkage mechanism causes the control valve to move the control valve to the neutral stop position. And the lowering operation of the working device is stopped. After that, the height of the work device with respect to the float is mechanically transmitted to the control valve by the lifting and lowering linkage mechanism, and the control valve is operated to maintain the work device at the set height from the paddy field.
  • the float that follows the ground contact with the rice field and the control valve that is operated by the elevator linkage mechanism have high reliability and reliability of the operation of the control valve. Will be things.
  • the control valve is biased to the lowering operation position, and the lifting and lowering linkage mechanism is
  • the control valve is stopped at the neutral stop position, and when the float rises with respect to the working device, the control valve is pushed to the rising operating position.
  • the control valve is allowed to move to the lowering operation position, and the lifting actuator separates the control valve from the lifting operation mechanism. It is preferable that the control valve is pushed to a position, the control valve is stopped at the neutral stop position, and the operation of the control valve to the descending operation position is allowed.
  • the elevating actuator and the elevating mechanism can operate the control valve by stopping and pushing the control valve in a parallel state.
  • the control valve is operated to the raising operation position and the neutral stop position in preference to the lifting linkage mechanism, and the control valve is operated by the lifting linkage mechanism. State is set reasonably.
  • control valve is provided with a spool slidable between the rising operation position on one side and the lowering operation position on the other side with the neutral stop position interposed therebetween, and the spool is provided in the lowering operation position.
  • the operating portion of the lifting/lowering linkage mechanism and the operating portion of the lifting/lowering actuator are arranged so as to line up to face the end of the spool. It is preferable that the operating section separately pushes the spool from the lowering operation position to the neutral stop position and the rising operation position.
  • the operating portion of the lifting/lowering linkage mechanism and the operating portion of the lifting/lowering actuator are arranged so as to face the end of the spool of the control valve, so that the lifting/lowering actuator and the lifting/lowering linkage mechanism are arranged as described above.
  • the lifting/lowering actuator and the lifting/lowering linkage mechanism are arranged as described above.
  • a marker actuator that can operate the holding mechanism to the release position and a marker control unit that operates the marker actuator based on the operation of the operation tool are provided, and the marker control section is configured such that the operation tool is at the right marker position.
  • the marker actuator When operated, the marker actuator is operated so that the right marker holding mechanism is operated to the release position, and when the operation tool is operated to the left marker position, the left marker holding mechanism is released to the release position. It is preferable to operate the marker actuator so that the marker actuator is operated.
  • Some paddy working machines are provided with right and left markers, and the right and left markers are supported so that they can be moved up and down from a working position to form an index of a working process on a rice field and a storage position above the rice field.
  • a marker operating mechanism and a marker holding mechanism are provided.
  • the right and left markers are moved to the storage position by the marker operating mechanism, and the right and left markers are moved as the working device is lowered to the rice field. Operated to the working position.
  • the marker holding mechanism can hold the right and left markers operated to the storage position at the storage position in preference to the marker operation mechanism, and the right and left markers are held at the storage position. In this state, even if the work device is lowered to the field, the right and left markers are held in the storage position and are not moved to the work position.
  • the working device With the right and left markers held in the retracted position, the working device is lowered to the rice field, and when the right marker holding mechanism is operated to the release position, the marker operation mechanism operates the right marker. Operated in position.
  • the right marker holding mechanism when the operating tool is operated to the right marker position in the above-mentioned state, the right marker holding mechanism is operated to the release position based on the operation of the marker actuator. The marker is moved to the working position.
  • the left marker holding mechanism is operated to the release position based on the operation of the marker actuator, and the left marker at the storage position is operated to the working position.
  • the right and left marker holding mechanisms are operated to the release position based on the operation of the marker actuator by the operation of the operation tool.
  • the marker actuators operate the right and left marker holding mechanisms to the release position without difficulty, and the right and left marker positions are set. Since the operation resistance of the marker holding mechanism is not applied to the operation tool, the operability of the right and left marker holding mechanisms by the operation tool is improved.
  • the marker operating mechanism, the marker holding mechanism, and the marker actuator are arranged in the vicinity of the hydraulic cylinder, and the hydraulic cylinder causes the hydraulic cylinder to move the lifting operation of the working device by the hydraulic cylinder.
  • the marker operating mechanism When the marker operating mechanism is operated, the marker is operated to the storage position, and the marker operating mechanism that operates the marker to the storage position is held by the marker holding mechanism, so that the marker is moved to the storage position.
  • the marker holding mechanism is operated to the release position by the marker actuator in a state in which the working device is lowered to the rice field by the hydraulic cylinder, and the marker in the storage position is operated by the marker holding mechanism. It is preferable to be operated to the position.
  • the marker operating mechanism operates the right and left markers to the storage position as the working device is lifted from the rice field as described above, the working device is lifted and lowered.
  • the marker operating mechanism is arranged in the vicinity of the hydraulic cylinder, and the marker operating mechanism is operated by the hydraulic cylinder.
  • the hydraulic cylinder is also used as the power source of the marker operating mechanism, which is advantageous in terms of simplification of the structure.
  • the marker holding mechanism and the marker actuator are also arranged in the vicinity of the hydraulic cylinder so that the marker operating mechanism, the marker holding mechanism and the marker actuator are mutually arranged. Placed in close proximity.
  • FIG. 4 is a right side view in the vicinity of a lifting motor, a control valve, and a first work linkage mechanism. It is a right side view near a control valve and an operation shaft. It is an exploded perspective view of a control valve, an operation shaft, an operation arm, a wire, etc.
  • FIG. 3 is a front view of the vicinity of a control valve, an operation shaft and an operation arm.
  • FIG. 6 is a right side view of the control valve, the planting clutch and the fertilizer application clutch that are operated in the shutoff position, and the vicinity of the first and second work linkage mechanisms.
  • FIG. 9 is a right side view showing a state where the planting clutch and the fertilizer application clutch are operated to the transmission position from the state shown in FIG. 8.
  • FIG. 6 is a right side view of the swing unit, the interchange unit, and the length adjusting unit in the first work linkage mechanism.
  • FIG. 6 is a cross-sectional plan view in the vicinity of a swing part, an interchange part and a length adjusting part in the first work linkage mechanism. It is a right side view near the planting clutch and the fertilizer application clutch. It is a cross-sectional top view of the vicinity of a planting clutch and a fertilizer application clutch. It is a longitudinal rear view of the vicinity of the 1st operation member and link member of a planting clutch.
  • FIG. 16 is a right side view of the first work linkage mechanism in the vicinity of the first and second swinging parts and the interchange part in the first alternative embodiment of the invention.
  • FIG. 26 is a right side view showing a state where the planting clutch and the fertilizer application clutch are operated to the transmission position from the state shown in FIG. 25 in the first another embodiment of the invention.
  • 1st another form of implementation of invention it is a cross-sectional top view of the 1st and 2nd rocking
  • FIG. 1 to 27 show a riding-type rice transplanter, which is an example of a paddy working machine, where F indicates a front direction, B indicates a rear direction, U indicates an upward direction, and D indicates a downward direction. , R indicates the rightward direction, and L indicates the leftward direction.
  • a riding-type rice transplanter is equipped with a link mechanism 4 supported on a rear part of a body 3 having right and left front wheels 1 and right and left rear wheels 2 so as to be vertically swingable.
  • a hydraulic cylinder 5 that is extended to the side and that moves up and down the link mechanism 4 is provided.
  • a seedling planting device 6 (corresponding to a working device) is supported at the rear part of the link mechanism 4.
  • a fertilizer application device 7 that supplies fertilizer to the paddy field G is provided across the rear part of the machine body 3 and the seedling planting device 6, and at the lower part of the front side of the seedling planting device 6, a leveling device 50 for leveling the paddy field G is provided. It is supported.
  • a mission case 73 is connected to a front portion of the machine body frame 60, and an engine 34 is supported on a front portion of the mission case 73. ..
  • the seedling planting device 6 is provided with a support frame 8, a feed case 14, a planting transmission case 9, a rotating case 10, a planting arm 11, a float 12, a seedling stand 13, and the like. Has been.
  • the support frame 8 is manufactured by the aluminum drawing method and has a trapezoidal cross-sectional shape (see FIG. 3).
  • the support frame 8 is arranged along the left-right direction, the feed case 14 is connected to the left-right center of the support frame 8, and the two planted transmission cases 9 are connected to the right and left parts of the support frame 8. Is extended to the rear side.
  • the rotating case 10 is rotatably supported on the right and left portions of the rear part of the planted transmission case 9, and the planted arms 11 are supported on both ends of the rotatable case 10.
  • a seedling stand 13 is supported so as to be capable of reciprocating in the left-right direction.
  • the power of the engine 34 is transmitted from the planted clutch 21 (corresponding to a work clutch) inside the transmission case 73 (see FIGS. 8 and 19) via the transmission shaft 35 to the transmission mechanism inside the feed case 14 (not shown).
  • the seedling stand 13 is reciprocated laterally with a predetermined stroke by a lateral feed shaft (not shown) provided in the feed case 14 in a lateral direction.
  • the power transmitted to the transmission mechanism of the feed case 14 is transmitted to the rotating case 10 via the transmission shaft 36, the torque limiter 37 inside the planted transmission case 9, the transmission chain 38 and the minority clutch 39.
  • the rotating case 10 is rotationally driven, and the planting arms 11 alternately take out the seedlings from the lower part of the seedling stand 13 and plant them on the rice field G.
  • the right and left markers 23 are vertically swingably supported around the axis P1 along the front-rear direction of the right and left ends of the support frame 8.
  • the marker 23 is provided with an arm portion 23a supported by the support frame 8 so as to be swingable around the axis P1 and a rotating body 23b supported by the tip of the arm portion 23a so as to be freely rotatable.
  • the marker 23 can be moved up and down from a work position B1 in which it touches the rice field G to form an index of a work process on the rice field G, and from the rice field G to an upper storage position B2. While the rotating body 23b of the marker 23 operated to the work position B1 is in contact with the rice field G, the machine body 3 advances to form an index on the rice field G while the rotating body 23b of the marker 23 rotates.
  • the fertilizer application device 7 is provided with a hopper 15, a feeding part 16, a blower 17, a groove making device 18, a hose 19, and the like.
  • a hopper 15 for storing fertilizer and a feeding portion 16 are supported on the rear side of the driver's seat 20 in the airframe 3, and a blower 17 is provided on the left lateral outside of the feeding portion 16.
  • the grooving device 18 is attached to the float 12, four grooving devices 18 are provided, and four hoses 19 are connected across the feeding portion 16 and the grooving device 18.
  • the power of the engine 34 is transmitted to the transmission arm 81 via the fertilizer application clutch 22 (see FIGS. 8 and 19) inside the mission case 73.
  • the transmission arm 81 extends to the left outside through the left body frame 60, and is rotationally driven around the axis in the left-right direction.
  • a transmission rod 82 is connected across the transmission arm 81 and the feeding portion 16, and the transmission rod 82 is linearly arranged in a side view.
  • the power of the engine 34 is transmitted to the transmission rod 82 via the fertilizer application clutch 22 and the transmission arm 81, and the transmission rod 82 is pushed and pulled along the front-rear direction to drive the feeding portion 16.
  • the fertilizer in the hopper 15 is delivered by the delivery unit 16 and is supplied to the grooving device 18 through the hose 19 by the transport wind of the blower 17.
  • the fertilizer is supplied from the grooving device 18 to the groove on the rice field G while the grooving device 18 forms the groove on the rice field G.
  • a leveling device 50 for leveling the rice field G is supported.
  • Right and left support members 45 are connected to the left and right ends of the support frame 8.
  • a transmission case 46 is supported by a left support member 45 so as to be vertically swingable and a support arm 47 is supported by a right support member 45 so as to be vertically swingable around an axis P6 which is the same as the transmission shaft 36. There is.
  • the drive shaft 48 is rotatably supported over the front of the transmission case 46 and the support arm 47, and a large number of ground leveling bodies 53 are attached to the drive shaft 48.
  • the power of the transmission shaft 36 is transmitted to the drive shaft 48 from the transmission shaft 49 installed over the transmission case 9 with the plant and the transmission case 46 via the torque limiter 51 and the transmission chain 52 inside the transmission case 46. To be done.
  • the drive shaft 48 and the ground leveling body 53 are rotationally driven in the counterclockwise direction in FIG. 1 by the power of the transmission shaft 36, and the ground leveling body 53 performs leveling on the field G.
  • the support member 45 extends to the front side, and the cover 54 is attached to the extended portion of the support member 45.
  • the cover 54 stops the mud splashed to the rear side by the leveling body 53 and prevents the mud from accumulating on the float 12.
  • a control valve 24 for supplying and discharging hydraulic oil to and from the hydraulic cylinder 5 is provided below the driver's seat 20 in the rear portion of the machine body 3.
  • the control valve 24 supplies the hydraulic oil to the hydraulic cylinder 5 to raise the hydraulic cylinder 5 (contract operation) in an ascending position, and discharges the hydraulic oil from the hydraulic cylinder 5 to lower the hydraulic cylinder 5 (extend operation). It can be operated to a descending operation position for stopping and a neutral stop position for stopping the hydraulic cylinder 5.
  • a spool 24a that can be slid in the front-rear direction (left-right direction in FIGS. 4 and 5) is provided in the control valve 24 in a forward direction.
  • the spool 24a of the control valve 24 is slidable between the neutral operating position and a rising operating position on the side closer to the control valve 24 on one side and a lowering operating position on the side farther from the control valve 24 on the other side.
  • a spring (not shown) provided inside the control valve 24 is urged to the lowering operation position.
  • Brackets 25 and 26 are connected to the front part of the control valve 24, and an operating shaft 55 is rotatably supported around a horizontal axis P7 of the brackets 25 and 26.
  • a fan-shaped operation gear 55a is connected to the right end portion of the operation shaft 55, a shaft-shaped operation portion 55b (corresponding to the operation portion of the lifting actuator) is connected to the operation gear 55a, and the operation portion 55b is connected to the control valve 24. Is extended to the end of the spool 24a.
  • a lifting motor 56 (corresponding to a lifting actuator) and a speed reduction mechanism 57 are connected to the bracket 26, and a pinion gear 57a of the speed reduction mechanism 57 meshes with an operation gear 55a of an operation shaft 55.
  • the pinion gear 57a of the speed reduction mechanism 57 is rotationally driven in the forward and reverse directions by the elevating motor 56, and the operation shaft 55 is rotationally operated in the forward and reverse directions.
  • the operating portion 55b of the operating shaft 55 is separated from the spool 24a of the control valve 24 toward the lowering operation position side.
  • the position A1 and the fourth position A4 are operated to a second position A2 for pushing the spool 24a of the control valve 24 to the neutral stop position, and a third position A3 for pushing the spool 24a of the control valve 24 to the raising operation position.
  • FIGS. 1, 2, and 3 Float support structure for planting equipment
  • two floats 12 are located on the rear side of the right and left rear wheels 2 in a plan view and below the planted transmission case 9 in a side view. It is located in.
  • a bracket 27 is connected to the rear portion of the support frame 8, and a float pipe 28 is arranged below the planted transmission case 9 along the left-right direction so that the float pipe 28 is rotatable about an axis P2 in the left-right direction. It is supported by 27.
  • the support arm 28a connected to the float pipe 28 is extended to the rear side, and the float 12 is supported so as to be able to move up and down (swingable) around the horizontal axis P3 of the rear end of the support arm 28a. There is.
  • a planting depth lever 29 is connected to the float pipe 28 and extends diagonally forward to the upper side.
  • a lever guide 30 is connected to the feed case 14, and a planting depth lever 29 is inserted in the lever guide 30.
  • the support arm 28a of the float pipe 28 is operated up and down, and the position of the axis P3 (rear part of the float 12) is changed up and down.
  • the position of the axis P3 is fixed.
  • the frame 31 is connected to the front portions of the two floats 12, and the two floats 12 integrally swing up and down around the axis P3.
  • the support member 32 is connected to the left and right center portions of the frame 31 and extends rearward, and the rake-shaped leveling member 33 is connected to the rear end portion of the support member 32. It is located in the center.
  • the channel-shaped detection unit 40 in a front view is swingably supported around the horizontal axis P4 of the bracket 31a connected to the left portion of the frame 31. , Extends upward between the support frame 8 and the cover 54.
  • connection member 41 formed by bending a round bar is provided.
  • the bracket 42 is connected to the upper portion of the support frame 8 so that the intermediate portion of the connecting member 41 is swingably supported around the horizontal axis P5 of the bracket 42.
  • a long hole 40a extending in the vertical direction is opened in the detection unit 40, and one end 41a of the connection member 41 is inserted into the long hole 40a of the detection unit 40 from the side.
  • a long hole 29a is opened in the planting depth lever 29, and the other end 41b of the connecting member 41 is inserted into the long hole 29a of the planting depth lever 29 from the lateral side.
  • One end of the inner 43a of the wire 43 (corresponding to the lifting and lowering linkage mechanism) is connected to the end 41a of the connection member 41, and one end of the outer 43b of the wire 43 is connected to the upper end of the detection unit 40. Has been done.
  • the float 12 follows the ground contact with the paddy field G as the machine body 3 progresses, and when the seedling planting device 6 moves up and down with respect to the paddy field G (float 12), the float 12 moves axially with respect to the seedling planting device 6. Since it swings up and down around the core P3, the detector 40 moves up and down with respect to the seedling planting device 6 (connecting member 41). The inner part 43a of the wire 43 is pushed and pulled by the vertical movement of the detection unit 40.
  • the operation arm 44 (corresponding to the lifting and lowering linkage mechanism) is supported by the operating shaft 55 so as to be relatively rotatable, and the operating portion 44 a of the operation arm 44 (the lifting and lowering linkage mechanism). (Corresponding to the operating portion) faces the end of the spool 24 a of the control valve 24.
  • the operation portion 44a of the operation arm 44 and the operation portion 55b of the operation shaft 55 are arranged so as to face the end of the spool 24a of the control valve 24 in the left-right direction when viewed from the front (see FIG. 7). ).
  • the operating portion 44a of the operating arm 44 and the operating portion 55b of the operating shaft 55 can separately push the spool 24a of the control valve 24 from the lowering operation position to the neutral stop position and the upper operation position.
  • a sensitivity lever 58 is swingably supported around the axis P8 in the left-right direction on the upper side of the control valve 24, and the sensitivity lever 58 extends upward through a lever guide 59.
  • the sensitivity lever 58 is bent in a crank shape when viewed from the front, and the lower end 58a of the sensitivity lever 58 supports the other end of the outer 43b of the wire 43.
  • the other end of the inner 43a of the wire 43 is connected to the upper portion of the operation arm 44.
  • the inner 43a of the wire 43 is pushed to the operation arm 44 side by the raising operation of the seedling planting device 6, and when the seedling planting device 6 returns to the set height H1, the upper end of the detection unit 40.
  • the positional relationship between the portion and the end 41a of the connecting member 41 (the length of the inner 43a extending from the outer 43b of the wire 43) returns to the state shown in FIG.
  • the spring inside the control valve 24 allows the spool 24a of the control valve 24 to operate in the neutral stop position, and the spring inside the control valve 24 causes the spool 24a of the control valve 24 to move to the operating arm 44.
  • the operation section 44a of the operation arm 44 is operated while being pushed to the neutral stop position while being pressed, and stopped at the neutral stop position by the operation section 44a of the operation arm 44.
  • the spring inside the control valve 24 allows the spool 24a of the control valve 24 to operate in the lowered operating position, and the spring inside the control valve 24 causes the spool 24a of the control valve 24 to move to the operating arm 44.
  • the hydraulic cylinder 5 is moved downward while the operation part 44a of the above is pushed to the lowering operation position, and the seedling planting device 6 is operated downward.
  • the detection unit 40 When the seedling planting device 6 is lowered, the inner 43a of the wire 43 is pulled to the seedling planting device 6 side, and when the seedling planting device 6 returns to the set height H1, the detection unit 40.
  • the positional relationship between the upper end of the wire 43 and the end 41a of the connecting member 41 (the length of the inner 43a extending from the outer 43b of the wire 43) returns to the state shown in FIG.
  • the operation arm 44 swings counterclockwise in FIG. 4, and the spool 24a of the control valve 24 is operated by the operation portion 44a of the operation arm 44. Is pushed to the neutral stop position and stopped at the neutral stop position.
  • the control valve 24 The height of the seedling planting device 6 with respect to the float 12 is mechanically transmitted to the control valve 24 by the wire 43 and the operation arm 44 provided over the float 12 and the spool 24a of the control valve 24 is operated.
  • the seedling planting device 6 is maintained at the set height H1 from the rice field G.
  • the planting depth lever 29 When the planting depth lever 29 is operated from the state shown in FIG. 3 and the position of the axis P3 (rear part of the float 12) with respect to the seedling planting device 6 is changed to the lower side, the set height H1 becomes high. The planting depth of seedlings becomes shallower.
  • connection member 41 is rocked around the axis P5 in conjunction with the planting depth lever 29, and the position of the end 41a of the connection member 41 is changed up and down as described below. ..
  • the seedling planting device can be operated as described above (the raising operation of the seedling planting device in the elevation control of the seedling planting device) and the (descent operation of the seedling planting device in the raising and lowering control of the seedling planting device). 6 is maintained at the set height H1 from the rice field G, and the planting depth of the seedlings by the seedling planting device 6 (planting arm 11) is maintained at the set planting depth.
  • the sensitivity lever 58 can set the sensitivity of the elevation control to sensitive and insensitive.
  • the state shown in FIGS. 3, 4, and 19 is a state in which the sensitivity lever 58 is operated to the center position of the operation range.
  • the operation position of the sensitivity lever 58 is changed to the sensitive side, the length of the inner wire 43a of the wire 43 extending to the operation arm 44 side becomes longer, and the length of the inner wire 43a of the wire 43 extending to the seedling planting device 6 side becomes longer. It gets shorter.
  • the posture of the float 12 in the state where the spool 24a of the control valve 24 is stopped at the neutral stop position is slightly downward, and the ground contact area of the rice paddy G of the float 12 is increased. It will be in a state of following the ground sensitively. Since the float 12 follows the ground surface G sensitively, the spool 24a of the control valve 24 is sensitively operated, and the sensitivity of the lifting control becomes sensitive.
  • the posture of the float 12 when the spool 24a of the control valve 24 is stopped at the neutral stop position is slightly upward, and the ground contact area of the pad surface G of the float 12 is reduced. It will be in a state to follow the ground touching insensitively.
  • the float 12 follows the touchdown surface G insensitively, so that the spool 24a of the control valve 24 is operated insensitively, and the sensitivity of the lifting control becomes insensitive.
  • first work linkage mechanism 61 is provided across the lifting motor 56 and the planting clutch 21. As described below, the first work linkage mechanism 61 is provided with a first linkage part 63, a swing part 64, a second linkage part 65, and the like.
  • an oscillating portion 64 is oscillatably supported on the right outer side of the right machine body frame 60 about an axis P9 in the left-right direction.
  • the oscillating portion 64 is configured by bending a plate material into a channel shape in a plan view, and has an elongated hole 64a in an outer portion of the oscillating portion 64.
  • an arm portion 55c is connected to a portion of the operation shaft 55 opposite to the operation gear 55a.
  • the link portion 63 is connected to the arm portion 55c of the operation shaft 55, and the operation portion 63a, which is the end portion of the link portion 63, is inserted into the elongated hole 64a of the swing portion 64, as shown in FIGS. Has been inserted.
  • the link portion 63 is arranged along the vertical direction, and with respect to an imaginary line connecting the operation shaft 55 (axis core P7) and the axis P9 of the swinging part 64 in a side view,
  • the long hole 64a of the swinging portion 64 is arranged on the rear side (the side opposite to the planting clutch 21).
  • the operating part of the linking part 63 is interlocked with the operating part 55b of the operating shaft 55 and the arm part 55c.
  • 63a is operated to the 1st position A1 and the 4th position A4, the 2nd position A2, and the 3rd position A3 (refer to the above-mentioned (structure regarding a control valve for a raising/lowering operation of a seedling planting device, and a raising/lowering motor)).
  • the interchangeable portion 67 provided with the operating portion 63 a of the linking portion 63 and the elongated hole 64 a of the swinging portion 64 serves to connect the first linking portion 63 and the swinging portion 64. It is provided in the connecting portion and is provided in the first work linking mechanism 61.
  • the length adjusting unit 66 is attached to the swinging unit 64 (see (Structure of Length Adjusting Unit) (Operation of Length Adjusting Unit) below), rod-like shape.
  • the linking part 65 is connected to the length adjusting part 66.
  • a long hole 60a extending in the front-rear direction is opened in the right body frame 60, and the linking portion 65 passes from the length adjusting portion 66 through the long hole 60a of the body frame 60 to the right and left body frames 60. It goes in between and extends to the front side.
  • the linking portion 65 is connected to the planting clutch 21 as described later (operating member for operating the planting clutch).
  • the planting clutch 21 is provided inside the rear portion of the mission case 73, and the planting clutch 21 is disposed between the right and left machine body frames 60 in a plan view. There is. An operation rod 68 for operating the planted clutch 21 to the transmission position and the disengagement position is supported by the mission case 73 so as to be vertically slidable.
  • a pair of flat plate-shaped (rib-shaped) support portions 83 along the up-down direction and the front-back direction are provided in the vicinity of the operation rod 68 in the mission case 73, and one side thereof is provided.
  • the inner surface of the support portion 83 on the other side is opened at a predetermined interval W1.
  • a pin-shaped support shaft 84 is provided, and one side portion and the other side portion of the support shaft 84 are supported by the one side and the other side support portions 83.
  • a first operation member 69 configured by bending a plate material is provided.
  • the arm portion 69d extending forward from the operating member portions 69a and 69b, the operating member swinging portion 69e extending downward from the operating member portion 69a on one side, and the operating member swinging portion 69e are opened.
  • An elongated portion 69f and a contact portion 69g extending from the operation member spacing portion 69c are provided.
  • the operation member portions 69a and 69b on one side and the other side of the operation member 69 are swingable around the axis P10 of the support shaft 84 in a portion of the support shaft 84 between the one side and the other side support portions 83. It is supported and the arm portion 69d of the operation member 69 is connected to the lower portion of the operation rod 68.
  • the front end 65a of the link portion 65 is inserted into the long hole 69f of the operation member 69.
  • the first work linkage mechanism 61 is provided across the lifting motor 56 and the operating member 69 via the operating shaft 55, and the operating shaft extends between the lifting motor 56 and the planting clutch 21.
  • a first work linkage mechanism 61 is provided via 55 and the operation member 69.
  • the operating rod 68 (planted clutch 21) is operated to the transmission position and the disengagement position.
  • the contact portion 69g of the operating member 69 abuts the supporting portion 83 on the other side, and the swinging of the operating member 69 beyond the transmission position is stopped.
  • a first spring 71 is connected to the operating member 69, and the operating member 69 is biased in the counterclockwise direction in FIG. 12 by the spring 71.
  • the operating rod 68, the operating member 69, and the planted clutch 21 are connected to the spring 71. Is urged to the cutoff position by.
  • the operating member spacing portion 69c of the operating member 69 maintains the spacing between the outer surfaces of the operating member portions 69a and 69b on one side and the other side of the operating member 69 at a predetermined spacing W1.
  • the outer surfaces of the operating member portions 69a and 69b on one side and the other side of the operating member 69 come into contact with the inner surfaces of the supporting portions 83 on the one side and the other side. Slide.
  • the spacing W1 in the direction along the axis of the support shaft 84 between the operating member portions 69a, 69b on one side and the other side of the operating member 69 is such that the operating member portion 69a on one side of the operating member 69 is Is in contact with the support portion 83 on one side, and the operation member portion 69b on the other side of the operation member 69 is maintained at the interval W1 in which the support portion 83 on the other side is contacted with the operation member interval of the operation member 69.
  • a portion 69c is provided.
  • linking member 70 formed by bending a plate material.
  • linking member 70 To the linking member 70, the linking member portion 70a on one side, the linking member portion 70b on the other side, the linking member spacing portion 70c connected over the linking member portions 70a and 70b on the one side and the other side, the linking member on one side
  • a linking member swinging portion 70e extending downward from the portion 70a, a connecting portion 70d provided in the linking member swinging portion 70e, and a long hole 70f opened in the linking member swinging portion 70e are provided.
  • the linking member portion 70a on one side of the linking member 70 is provided on the outer side of the support shaft 84 on the opposite side of the operating member 69 with respect to the one side supporting portion 83. It is swingably supported around the axis P10 of 84.
  • a linking member portion 70b on the other side of the linking member 70 is swingable around the axis P10 of the linking shaft 70 at a portion on the opposite side of the operating member 69 with respect to the support portion 83 on the other side of the support shaft 84. Supported by.
  • the spacing between the inner surfaces of the linking member portions 70a and 70b on one side and the other side of the linking member 70 becomes a predetermined spacing W2 on the outer surface of the support portion 83 on the one side and the other side.
  • W2 the spacing between the inner surfaces of the linking member portions 70a and 70b on one side and the other side of the linking member 70
  • the distance W2 in the direction along the axis P10 of the support shaft 84 of the linking member portions 70a and 70b on one side and the other side of the linking member 70 is the linking member portion on one side of the linking member 70.
  • the linking member of the linking member 70 is maintained so that the space 70a is in contact with the support part 83 on one side and the linking member portion 70b on the other side of the linking member 70 is in contact with the support part 83 on the other side.
  • a spacing portion 70c is provided.
  • the operating member swinging portion 69e of the operating member 69 and the linking member swinging portion 70e of the linking member 70 are adjacent to each other, and the front end portion 65a of the linking portion 65 is The long hole 69f of the operating member 69 and the long hole 70f of the linking member 70 are inserted.
  • a spacer 85 is attached to a portion between the operating member swinging portion 69 e of the operating member 69 and the linking member swinging portion 70 e of the linking member 70.
  • the distance between the operating member swinging portion 69e of the operating member 69 and the linking member swinging portion 70e of the linking member 70 is maintained at a predetermined distance W3 that is the width of the spacer 85.
  • the fertilizer application clutch 22 is provided at the rear part of the mission case 73, and the second work association mechanism 62 extends between the first work association mechanism 61 and the fertilization application clutch 22. Is provided.
  • the second work linkage mechanism 62 is provided with a second operation member 75, a third linkage portion 76, and the like, as described below.
  • An operating member 75 for operating the fertilizer clutch 22 to the transmission position and the shutoff position is swingably supported around the vertical axis P11 below the fertilizer clutch 22.
  • a rod-shaped linking portion 76 is connected across the connecting portion 70d of the linking member 70 and the operating member 75.
  • the second spring 72 is connected to the operating member 75, and the operating member 75 is biased in the counterclockwise direction in FIG. 13 by the spring 72.
  • the operating member 75 and the fertilizer clutch 22 are moved to the blocking position by the spring 72. It is energized.
  • the second work linking mechanism 62 is provided across the linking member 70 and the second operating member 75, and the linking member 70 extends across the first work linking mechanism 61 and the fertilizer application clutch 22.
  • a second work linking mechanism 62 is provided via the second operation member 75.
  • the length adjusting unit 66 is provided with an adjusting unit 86, a connecting unit 87, and the like.
  • the end of the adjustment unit 86 which is triangular and flat in a side view, is supported so as to be vertically swingable around the horizontal axis P12 of the swing unit 64.
  • a long hole 64b extending in the up-down direction is opened in the swing portion 64, and an end portion 65b of the linking portion 65 is inserted into the long hole 64b of the swing portion 64 and connected to the adjusting portion 86.
  • the adjustment portion 86 has three connection holes 86a, 86b, 86c along the vertical direction, and the swinging portion 64 has one connection hole 64c.
  • the connecting portion 87 including the bolt and the nut is inserted into the connecting hole 86a of the adjusting portion 86 and the connecting hole 64c of the swinging portion 64, and the adjusting portion 86 is attached to the swinging portion 64. It is in a state of being connected at the position shown in.
  • the length adjusting portion 66 and the swinging portion 64 are arranged on the right outer side of the right machine body frame 60 in a plan view, and at a position close to the rear wheel 2 in a side view. It is arranged on the rear side of a certain aircraft 3.
  • the length adjusting portion 66 is provided at the connecting portion between the second linking portion 65 and the swinging portion 64, and is arranged in front of the axis P9 of the swinging portion 64 in a side view.
  • the length adjusting portion 66 is arranged outside the swinging portion 64 in a plan view, and the linking portion 65 is arranged on the right body frame 60 side with respect to the swinging portion 64 in a plan view. ..
  • the position of the end portion 65b of the linking portion 65 is adjusted from the position shown in FIG. 10 along the moving direction of the linking portion 65. It slightly moves to the opposite side of the portion 66 (axial center P12), and then slightly to the length adjusting part 66 (axial center P12) side.
  • the connecting portion 87 When the connecting portion 87 is inserted into the connecting hole 86b of the adjusting portion 86 and the adjusting portion 86 is connected to the swinging portion 64, the position of the end portion 65b of the linking portion 65 is slightly aligned with the length adjusting portion 66 (axis P12). Located on the near side, the length from the elevating motor 56 of the first work linkage mechanism 61 to the planting clutch 21 is slightly shorter than the above state.
  • the connecting portion 87 When the connecting portion 87 is inserted into the connecting hole 86c of the adjusting portion 86 and the adjusting portion 86 is connected to the swinging portion 64, the position of the end portion 65a of the linking portion 65 is set to the length adjusting portion 66 (axis P12) most. At the near side, the length from the lifting motor 56 of the first work linkage mechanism 61 to the planting clutch 21 is the shortest.
  • the adjusting portion 86 is vertically swung to insert the connecting portion 87 into the connecting holes 86a, 86b, 86c of the adjusting portion 86 and the connecting hole 64c of the swinging portion 64, and the adjusting portion 86 is moved.
  • swiveling part 64 in the edge part 65b of the linking part 65 is changed in three steps along the moving direction of the linking part 65.
  • the position of the end portion 65b of the linkage portion 65 is slightly changed back and forth along the moving direction of the linkage portion 65, and extends from the lifting motor 56 of the first work linkage mechanism 61 to the planting clutch 21. The length is adjusted.
  • the operating portion 63a of the linking portion 63 When the operating portion 63a of the linking portion 63 is located at the first position A1, the operating member 69 is operated by the spring 71 in the counterclockwise direction in FIG. 12, the planting clutch 21 is operated to the disengagement position, and the spring 72 is operated. Thus, the operating member 75 is operated in the counterclockwise direction in FIG. 13, and the fertilizer application clutch 22 is operated to the disengagement position.
  • the end portion 65a of the linking portion 65 is located at the front-rear intermediate portion of the elongated hole 69f of the operating member 69, and is located behind the elongated hole 70f of the linking member 70.
  • the operation of maintaining the state maintained is not transmitted to the planting clutch 21 and the fertilizer application clutch 22 (operation member 69) by the interchange part 67.
  • the end portion 65a of the linking portion 65 is located at the front-rear intermediate portion of the elongated hole 69f of the operating member 69, the end portion 65a of the linking portion 65 extends along the elongated hole 69f of the operating member 69. Only by moving to the rear side, the operating member 69 is not operated and the planted clutch 21 is maintained in the disengaged position.
  • the fertilizer application clutch 22 is operated to the transmission position by the linkage member 70, the second work linkage mechanism 62, and the second operation member 75. It The operation of operating the planting clutch 21 and the fertilizer application clutch 22 in the elevation motor 56 to the transmission position is transmitted to the planting clutch 21 and the fertilizer application clutch 22 by the interchange part 67.
  • the fertilizer application clutch 22 is operated to the transmission position, so that the first fertilizer reaches the grooving device 18 (field G) at substantially the same time.
  • the planting of the seedling by the planting arm 11 can be started.
  • the first and second springs are operated by the first and second work linkage mechanisms 61 and 62.
  • the planting clutch 21 and the fertilizer application clutch 22 are in the state of being operated to the transmission position against 71 and 72.
  • the operation of operating the planting clutch 21 in the lifting motor 56 to the transmission position is performed from the first work linkage mechanism 61 to the second position.
  • the fertilizer application clutch 22 is transmitted to the fertilizer application clutch 22 via the work linkage mechanism 62, and the fertilizer application clutch 22 is operated to the transmission position against the second spring 72.
  • the oscillating portion 64 causes the linkage. Since the pulling operation of the portion 65 is eliminated, as described in the above (operation of the raising/lowering motor to the disengagement position of the planting clutch and the fertilizing clutch), the springs 71 and 72 are used to plant the planting clutch 21 and the fertilizing clutch 22. Are operated to the blocking position at substantially the same time.
  • the fertilizer application clutch 22 is moved to the disengaged position via the linkage member 70, the second work linkage mechanism 62, and the second operation member 75. Operated.
  • a steering handle 77 for steering the front wheels 1 is provided in the front portion of the machine body 3, and an operating lever 78 (corresponding to an operating tool is provided on the lower right side of the steering handle 77. ) Is provided and extends to the right side.
  • the operation lever 78 includes a neutral position N, a first lifted position U1, a second lifted position U2 (corresponding to a lifted position), a first lowered position D1, a second lowered position D2 (corresponding to a lowered position), and a rear right marker. It is possible to artificially operate at the position R1 and the front left marker position L1.
  • the operating lever 78 is biased to the neutral position N so that when the operator releases the operating lever 78, the operating lever 78 automatically returns to the neutral position N.
  • the control device 100 is provided on the machine body 3, a position sensor (not shown) for detecting the operation position of the operation lever 78 is provided, and the operation position of the operation lever 78 is input to the control device 100.
  • An angle sensor 79 (corresponding to the upper limit position detecting unit) (corresponding to the lower limit position detecting unit) that detects the vertical angle of the link mechanism 4 with respect to the machine body 3 is provided, and the detection value of the angle sensor 79 is input to the control device 100. ing.
  • a position sensor 80 that detects the rotation angle of the operation shaft 55 is connected to the end of the operation shaft 55 on the side of the arm portion 55c, and the detected value of the position sensor 80 is controlled. It is input to the device 100.
  • the position sensor 80 detects the rotation angle of the operation shaft 55, whereby the positions of the operation portion 55b and the arm portion 55c of the operation shaft 55 are detected.
  • the elevating control unit 101 is provided as software in the control device 100, and operates positions of the operation lever 78 (neutral position N, first raised position U1, second raised position U2, first lowered position D1, second lowered position). Based on the detected value of D2) and the angle sensor 79, the lift control unit 101 (control device 100) operates the lift motor 56 as described below.
  • the raising/lowering motor 56 operates the operating portion 55b and the arm portion 55c of the operation shaft 55 to the fourth position A4, and the raising/lowering motor 56 operates the planting clutch 21 and the fertilizer clutch 22 to the transmission position, as shown in FIG.
  • the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44.
  • step S1 when the operation lever 78 is operated to the first raised position U1 (step S1), the operation section 55b of the operation shaft 55 and the arm section 55c are moved by the elevating motor 56. , To the third position A3 (step S2).
  • the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position (see (Operation of the planting clutch and fertilizer application clutch to disengagement position by the lifting motor) described above), and the wire 43 and the operation arm 44 are given priority.
  • the spool 24a of the control valve 24 is pushed to the raising operation position, the hydraulic cylinder 5 is raised, and the seedling planting device 6 is raised.
  • Step S7 When the operating lever 78 is operated from the first raised position U1 to the neutral position N (steps S1 and S6), the operating unit 55b and the arm 55c of the operating shaft 55 are operated to the second position A2 by the elevating motor 56. (Step S7).
  • the spool 24a of the control valve 24 is operated to return to the neutral stop position in preference to the wire 43 and the operation arm 44, and the hydraulic cylinder is operated. 5 and the seedling planting device 6 are stopped.
  • Step S4 When the angle sensor 79 detects that the link mechanism 4 has reached the upper limit position in the state where the operation lever 78 is operated to the first elevated position U1 (the state where the seedling planting device 6 is operated to be elevated) ( (Step S4), the operating portion 55b and the arm portion 55c of the operating shaft 55 are operated to the second position A2 by the lifting motor 56 (step S7).
  • step S1 The raising operation of the seedling planting device by the second raising position of the operation lever
  • step S3 the operating portion 55b of the operating shaft 55 and the arm portion 55c are moved to the third position A3 by the lifting motor 56. It is operated (step S3).
  • the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position (see (Operation of the planting clutch and fertilizer application clutch to disengagement position by the lifting motor) described above), and the wire 43 and the operation arm 44 are given priority.
  • the spool 24a of the control valve 24 is pushed to the raising operation position, the hydraulic cylinder 5 is raised, and the seedling planting device 6 is raised.
  • step S1 Even if the operating lever 78 is operated from the second raised position U2 to the neutral position N (step S1), the operating portion 55b and the arm portion 55c of the operating shaft 55 are maintained at the third position A3 by the lifting motor 56 (step S3). ), the spool 24a of the control valve 24 is maintained in a state of being pushed to the raising operation position in preference to the wire 43 and the operating arm 44, and the raising operation of the hydraulic cylinder 5 and the raising operation of the seedling planting device 6 are performed. Continued.
  • step S5 when the angle sensor 79 detects that the link mechanism 4 has reached the upper limit position in the state where the raising operation of the hydraulic cylinder 5 and the raising operation of the seedling planting device 6 are continued (step S5).
  • the operating portion 55b and the arm portion 55c of the operating shaft 55 are operated to the second position A2 by the lifting motor 56 (step S7).
  • the float 12 When the float 12 is separated from the rice field G to the upper side, the float 12 is lowered with respect to the seedling planting device 6, and the detection unit 40 is lowered with respect to the connection member 41, so that the inner portion of the wire 43 is lowered. 43a is pushed to the operation arm 44 side.
  • step S1 when the operating lever 78 is operated to the first lowered position D1 (step S1), the lifting motor 56 causes the operating portion 55b of the operating shaft 55 and the arm portion 55c. Is operated to the first position A1 (step S11).
  • the spool inside the control valve 24 may cause the spool 24a of the control valve 24 to move to the lowering operation position. Permissible.
  • the spool 43a of the control valve 24 is operated by the wire 43 and the operation arm 44, and the spring inside the control valve 24 causes the spool 24a of the control valve 24 to operate the operation portion 44a of the operation arm 44.
  • the hydraulic cylinder 5 is moved to the descending operation position, the hydraulic cylinder 5 is descended, and the seedling planting device 6 is descended (see the above-mentioned (the descending operation of the seedling planting device in the elevation control of the seedling planting device)). ..
  • the planting clutch 21 and the fertilizer application clutch 22 are operated (maintained) at the cutoff position.
  • Step S14 When the operating lever 78 is operated from the first lowered position D1 to the neutral position N (steps S1 and S13), the operating portion 55b and the arm portion 55c of the operating shaft 55 are operated to the second position A2 by the lifting motor 56. (Step S14).
  • the spool 24a of the control valve 24 is operated to return to the neutral stop position in preference to the wire 43 and the operation arm 44, and the hydraulic cylinder is operated. 5 and the seedling planting device 6 are stopped.
  • the link mechanism 4 may reach the lower limit position.
  • the angle sensor 79 detects that the link mechanism 4 has reached the lower limit position in a state where the operation lever 78 is operated to the first lowered position D1 (a state where the seedling planting device 6 is moved downward) ( (Step S12)
  • the operating portion 55b and the arm portion 55c of the operating shaft 55 are operated to the second position A2 by the lifting motor 56 (step S14).
  • step S1 Down operation of the seedling planting device by the second lower position of the operation lever
  • step S21 Down operation of the seedling planting device by the second lower position of the operation lever
  • the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44, and the control valve 24 is operated.
  • the spool 24a is moved to the lowering operation position, the hydraulic cylinder 5 is lowered, and the seedling planting device 6 is lowered.
  • the planting clutch 21 and the fertilizer application clutch 22 are operated (maintained) at the cutoff position.
  • step S22 Even if the operating lever 78 is operated from the second lowered position D2 to the neutral position N (steps S22 to S25), the operating portion 55b and the arm portion 55c of the operating shaft 55 are maintained at the first position A1 by the lifting motor 56 ( In step S22), the state in which the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44 is maintained, and the lowering operation of the hydraulic cylinder 5 and the lowering operation of the seedling planting device 6 are continued.
  • the seedling planting device 6 When the float 12 is grounded to the rice field G, the seedling planting device 6 is maintained at the set height H1 due to the state in which the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44. 6 (planting arm 11) is in a state where the planting depth of the seedling is maintained at the set planting depth (the above-mentioned (the raising operation of the seedling planting device in the elevation control of the seedling planting device) and the (seedling plant)). See the descending operation of the seedling planting device in the lifting control of the planting plant)).
  • the link mechanism 4 may reach the lower limit position.
  • the angle sensor 79 detects that the link mechanism 4 has reached the lower limit position (step S25)
  • the lifting motor 56 operates the operating portion 55b and the arm portion 55c of the operating shaft 55 to the second position A2 ( Step S26).
  • the spool 24a of the control valve 24 is returned to the neutral stop position in preference to the wire 43 and the operation arm 44, and the hydraulic cylinder 5 and the seedling planting device 6 stop at the lower limit position.
  • a guide plate 88 is supported on the lower side of the driver's seat 20 in the rear part of the machine body 3 and on the part on the center side of the machine body with respect to the control valve 24.
  • the right and left operation arms 89 are supported independently of each other around the axis P13 of the lower side of the guide plate 88 in the left-right direction so as to be swingable in the front-rear direction.
  • the right wire 90 (corresponding to a marker operating mechanism) is connected across the upper part of the right operation arm 89 and the arm portion 23a of the right marker 23, and the upper part of the left operation arm 89 and the arm of the left marker 23 are connected.
  • the left wire 90 (corresponding to a marker operating mechanism) is connected to the portion 23a.
  • Two long hole-shaped openings 88a are opened in the guide plate 88 along the front-rear direction, and the operation portion 89a at the upper end of the operation arm 89 passes through the opening 88a of the guide plate 88 to the upper side.
  • right and left springs 91 (corresponding to a marker operating mechanism) that bias the right and left markers 23 to the working position B1 are connected to the right and left markers 23.
  • the operation arms 89 and the wires 90 are arranged so as to be adjacent to the hydraulic cylinders 5. It is located near. As shown in FIGS. 16 and 19, the operating portion 5a connected to the piston of the hydraulic cylinder 5 is arranged above the guide plate 88 and behind the operating portion 89a of the operating arm 89.
  • the state indicated by the chain double-dashed line in FIG. 16 is a state in which the hydraulic cylinder 5 is lowered (the piston is extended) and the seedling planting device 6 is lowered to the rice field G.
  • the operating portion 5a of the hydraulic cylinder 5 is separated from the operating portion 89a of the operating arm 89 rearward, the marker 23 is operated to the work position B1 by the spring 91, and the wire 90 is pulled to the marker 23 side.
  • the operating portion 89a of the operating arm 89 is located at the rear end portion of the opening 88a of the guide plate 88.
  • the support pin 92 is connected upward to the guide plate 88, and the right and left holding arms 93 (corresponding to the marker holding mechanism) are provided around the axis P14 of the support pin 92. , Swingably supported independently of each other.
  • a spring 94 (corresponding to a marker holding mechanism) is attached to the support pin 92 so that the holding portions 93a at the tips of the right and left holding arms 93 approach each other by the spring 94 in the right and left holding arms. 93 is activated.
  • a part of the guide plate 88 is bent upward and a contact part 88b is provided, and the holding part 93a of the holding arm 93 hits the contact part 88b of the guide plate 88 so that the holding part 93a of the holding arm 93 is flat. It is stopped at the holding position overlapping the opening 88a of the guide plate 88 when viewed.
  • the operating portion 5a of the hydraulic cylinder 5 operates the operating arm.
  • the operating portion 89a of the operating arm 89 pushes the holding portion 93a of the holding arm 93 in the holding position against the spring 94, and pushes the holding portion 93a away from the holding portion 93a. Reach the position shown in.
  • the operation arm 89 While the operation arm 89 is held in the posture shown in FIGS. 16 and 17 by the holding arm 93, the seedling planting device 6 is lowered by the hydraulic cylinder 5, and the operating portion 5a of the hydraulic cylinder 5 is moved to the rear side. Even if it moves, the operation arm 89 is held by the holding arm 93 in the posture shown in FIGS. 16 and 17, and the marker 23 is held at the storage position B2.
  • the holding arm 93 and the spring 94 are in a state of holding the right and left markers 23 operated to the storage position B2 in the storage position B2 in preference to the operation arm 89, the wire 90 and the spring 91.
  • the angle-shaped operation arm 96 in front view can swing in the front-back direction around the horizontal axis P15 of the support plate 95 supported on the upper side of the guide plate 88. It is supported.
  • a fan-shaped operation gear 96a is connected to the operation arm 96 so as to swing integrally with the operation arm 96.
  • a marker motor 97 (corresponding to a marker actuator) and a reduction mechanism 98 are connected to a support plate 95, and a pinion gear 98a of the reduction mechanism 98 meshes with an operation gear 96a of an operation arm 96.
  • the marker motor 97 rotationally drives the pinion gear 98a of the reduction mechanism 98 in the forward and reverse directions, and the operation arm 96 is oscillated in the forward and reverse directions.
  • the operation member 99 is swingably supported around the axis P14 of the support pin 92 independently of the holding arm 93.
  • the operation member 99 is bent into a channel shape in a side view, is formed into a bifurcated shape in a plan view, is provided with right and left operation portions 99a, and has an arm portion 99b extending laterally outward.
  • the rear portion of the holding arm 93 extends upward to form an operating portion 93b, and the operating portion 99a of the operating member 99 is located outside the operating portion 93b of the holding arm 93.
  • the distal end portion of the operation arm 96 is formed in a bifurcated shape, the arm portion 99b of the operation member 99 is inserted into the bifurcated distal end portion of the operation arm 96, and the operation arm 96 and the arm portion 99b of the operation member 99 are engaged with each other. doing.
  • the guide plate 88 supports the holding arm 93 and the spring 94, and A marker motor 97 is arranged on the upper side.
  • the operation arm 89 and the wire 90, the holding arm 93 and the spring 94, and the marker motor 97 are arranged near the hydraulic cylinder 5.
  • the right operating portion 99a of the operating member 99 pushes the operating portion 93b of the right holding arm 93 to hold the right holding arm 93.
  • the right holding arm 93 is operated to a release position where the portion 93a is disengaged from the operation portion 89a of the right operation arm 89.
  • the position sensor 111 that detects the rotation angle of the operation arm 96 is connected to the operation arm 96, and the detection value of the position sensor 111 is input to the control device 100.
  • the position of the operation member 99 is detected by detecting the rotation angle of the operation arm 96 by the position sensor 111.
  • the marker control unit 102 is provided as software in the control device 100, and based on the operation position of the operation lever 78 (right marker position R1 and left marker position L1) and the detection value of the position sensor 111, the marker control unit 102.
  • the marker motor 97 is operated by the (control device 100) as described below.
  • the operation lever 78 is set at the first raising position.
  • the right and left markers 23 as described in the above (marker holding mechanism for holding the marker in the storage position). Is operated to the storage position B2, the right and left operation arms 89 are held by the right and left holding arms 93, and the right and left markers 23 are held at the storage position B2.
  • the operation lever 78 When the operation lever 78 is operated to the right marker position R1, the operation arm 96 is rocked to the front side by the marker motor 97 as described above (configuration regarding the marker motor capable of releasing the marker holding mechanism), The operation member 99 is rocked in the clockwise direction in FIG. 17, and the right holding arm 93 is operated to the release position.
  • the right marker 23 is operated to the work position B1 by the spring 91, the right wire 90 is pulled to the right marker 23 side, and the operation portion 89a of the right operation arm 89 is guided by the guide plate 88. It returns to the state of being located at the rear end of the opening 88a (see the chain double-dashed line in FIG. 16).
  • the operation lever 78 When the operation lever 78 is operated to the left marker position L1, the operation arm 96 is oscillated to the rear side by the marker motor 97 as described above (configuration regarding the marker motor capable of releasing the marker holding mechanism).
  • the operating member 99 is swung counterclockwise in FIG. 17, and the left holding arm 93 is operated to the release position.
  • the left marker 23 is operated to the work position B1 by the spring 91, the left wire 90 is pulled to the left marker 23 side, and the operation portion 89a of the left operation arm 89 is guided by the guide plate 88. It returns to the state of being located at the rear end of the opening 88a (see the chain double-dashed line in FIG. 16).
  • the marker motor 97 When the operating lever 78 is operated to the right marker position R1 (left marker position L1) and the set time required for the operating portion 89a of the operating arm 89 to pass through the holding portion 93a of the holding arm 93 elapses, the marker motor 97. Thus, the operation arm 96 is returned to the position shown in FIG. 17, and the right (left) holding arm 93 is returned to the holding position.
  • the operation device 78 When the operation device 78 is operated to the right marker position R1 and then to the left marker position L1 in the state where the seedling planting device 6 is operated to descend to the rice field G (the left marker position L1 is operated, then the left marker position L1 is operated).
  • the right marker position R1) When operated to the right marker position R1), the right and left markers 23 are operated to the work position B1.
  • a fan-shaped operation gear 112 is swingably supported around an axial center P16 in the front-rear direction above the front part of the seedling planting device 6.
  • the electric motor 113 and the speed reduction mechanism 114 are supported on the upper part of the front part of the seedling planting device 6, and the pinion gear of the speed reduction mechanism 114 meshes with the operation gear 112.
  • a link rod 115 is connected across the operation gear 112, the transmission case 46, and the support arm 47.
  • the electric motor 113 rotationally drives the pinion gear of the reduction mechanism 114 in the forward and reverse directions, swings the operation gear 112 in the forward and reverse directions, and raises and lowers the leveling device 50 (the transmission case 46 and the support arm 47) around the axis P6. To be done.
  • a dial operation type ground leveling switch 116 is provided below the control handle 77, and an operation signal of the ground leveling switch 116 is input to the control device 100.
  • the ground leveling switch 116 is provided with a work position and a storage position, and the ground leveling switch 116 arbitrarily sets the set ground leveling depth of the ground leveling device 50 in the operation range of the work position.
  • the height sensor 117 is connected to the shaft core P16 portion of the operation gear 112, and the height sensor 117 detects the vertical position of the ground leveling device 50 with respect to the seedling planting device 6, and the detected value of the height sensor 117. Is input to the control device 100.
  • a position sensor 118 that detects the operating position of the planting depth lever 29 is provided, and the detection value of the position sensor 118 is input to the control device 100.
  • the ground leveling control unit 103 is provided as software in the control device 100. Based on the operation position of the ground leveling switch 116 and the detection values of the height sensor 117 and the position sensor 118, the ground leveling control unit 103 (control device 100) operates the electric power.
  • the motor 113 is operated as described below.
  • the set height H1 set planting depth of seedling
  • the detection value of the height sensor 117 vertical position of the ground leveling device 50 with respect to the seedling planting device 6
  • the electric motor 113 is operated and the leveling device 50 is moved up and down so that the leveling depth H2 of the leveling device 50 becomes the set leveling depth of the leveling switch 116.
  • the electric motor 113 operates so that the ground leveling depth H2 of the ground leveling device 50 becomes the changed set ground leveling depth of the leveling switch 116, and the ground leveling device 50 is operated. Is moved up and down.
  • the detection value of the position sensor 118 (changed set height H1 (set planting depth of seedling)) and the height sensor 117 Based on the detected value, the ground leveling depth H2 of the ground leveling device 50 is detected, and the electric motor 113 is operated so that the ground leveling depth H2 of the ground leveling device 50 becomes the set ground leveling depth of the ground leveling switch 116.
  • the device 50 is moved up and down.
  • the upper limit position of the leveling device 50 is a position where the leveling device 50 is largely lifted from the field G and the leveling device 50 does not touch the field G.
  • the operator When the turning J1 is completed, the operator operates the operation lever 78 to lower the seedling planting device 6 to the rice field G, and operates the planting clutch 21 and the fertilizer clutch 22 to the transmission position to perform the next planting. Entering process K2.
  • the end position K11 of the previous planting process K1 (the position of the seedling planting device 6 in which the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position) and the start position K21 of the next planting process K2 ( It is necessary to match the position of the seedling planting device 6 in which the planting clutch 21 and the fertilizer application clutch 22 are operated to the transmission position).
  • the planting and assembling control unit 104 is provided as software in the control device 100.
  • a rotation speed sensor 120 that detects the rotation speed of the rear wheel 2 is provided, and the detection value of the rotation speed sensor 120 is input to the control device 100.
  • a dial operation type planting and arranging switch 119 is provided near the steering handle 77, and an operation signal of the planting and arranging switch 119 is input to the control device 100.
  • the planting alignment control unit 104 detects the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting stroke K1 with the end position K11 as the origin, and the direction along the planting stroke K1. The angle of the machine body 3 with respect to the reference direction is detected with reference to.
  • the position of the machine body 3 moves away from the origin (end position K11) to the ridge F side, and the angle of the machine body 3 with respect to the reference direction. It gradually grows from 0 degrees.
  • the position of the machine body 3 (the seedling planting device 6) stops, and as the angle of the machine body 3 approaches 90 degrees to 180 degrees as the turning J1 progresses.
  • the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting process K1 approaches the origin (end position K11).
  • the angle of the machine body 3 becomes 180 degrees, and if the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting process K1 is located at the origin (end position K11), the end position K11 is obtained. It can be determined that the start position K21 matches.
  • the planting alignment control unit 104 causes the lifting motor 56 to move the elevator motor 56 as described below so that the end position K11 and the start position K21 coincide with each other. Operated.
  • the planting alignment control unit 104 sets the end position K11 at the time when the operation lever 78 is operated, and the planting operation is performed.
  • the direction along the additional process K1 is set as the reference direction. With the end position K11 as the origin, detection of the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting process K1 and detection of the angle of the machine body 3 with respect to the reference direction are started.
  • the angle of the machine body 3 reaches between 90 degrees and 180 degrees, and the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting process K1 is slightly on the ridge F side from the origin (end position K11).
  • the planting/alignment control unit 104 determines that it has entered the second half of the turning J1, and prioritizes the lifting/lowering control unit 101, the lifting/lowering motor 56 causes the operation unit 55b and the arm unit 55c of the operation shaft 55 to move to the third position.
  • the seedling planting device 6 is lowered to the rice field G (see the above-described (Descent operation of the seedling planting device by the second lowering position of the operation lever)).
  • the planting alignment control unit 104 In preference to the lifting control unit 101, the lifting motor 56 operates the operation unit 55b and the arm unit 55c of the operation shaft 55 to the fourth position A4 to operate the planting clutch 21 and the fertilization clutch 22 to the transmission position. (Refer to the above (operation to the transmission position of the planting clutch and the fertilizer application clutch by the second lowered position of the operation lever)).
  • the timing at which the operating portion 55b and the arm 55c of the operating shaft 55 are operated to the fourth position A4 is set to the planting stroke K1.
  • the position of the machine body 3 (seedling planting device 6) at the coordinates along the line can be set slightly before (early) or slightly after (late) when the origin (end position K11) is reached.
  • the planting alignment control unit 104 stops. Therefore, the operator operates the operation lever 78 so that the end position K11 and the start position K21 coincide with each other, The descending operation of the seedling planting device 6 to the rice field G and the operation of the planting clutch 21 and the fertilization clutch 22 to the transmission position are performed.
  • the interchange part 67 provided in the first work linking mechanism 61 may be configured as described below.
  • a support shaft 74 is connected across the right and left body frames 60.
  • the first swinging portion 64 and the second swinging portion 121 are swingable independently of each other around the axis P9 in the left-right direction at the end of the support shaft 74 on the right outer side of the right machine body frame 60. It is supported.
  • a rod-shaped first linking portion 63 is connected across the arm portion 55c of the operating shaft 55 and the swinging portion 64.
  • the swinging unit 64 is linked to the operating unit 55b and the arm unit 55c of the operating shaft 55 so that the swinging unit 64 moves to the first position A1, the fourth position A4, and the second position.
  • A2, 3rd position A3 is operated (refer to the above-mentioned (configuration regarding the control valve for raising/lowering operation of the seedling planting device and the raising/lowering motor)).
  • a pin-shaped operation portion 64d is connected to the swing portion 64, and an arc-shaped long hole 121a centered on the axis P9 is opened in the swing portion 121. It is inserted in the long hole 121a of the swinging part 121.
  • the interchange portion 67 provided with the operation portion 64d of the swing portion 64 and the elongated hole 121a of the swing portion 121 is provided across the first swing portion 64 and the second swing portion 121. And is provided in the first work linkage mechanism 61.
  • the rod-shaped second linking portion 65 is connected to the swinging portion 121 and passes between the right and left body frames 60 through the long hole 60 a of the body frame 60.
  • the link portion 65 extends to the front side and is connected to the operation member 69 and the link member 70 (see the above-mentioned (operation member for operating the planting clutch)). In this case, the length adjusting unit 66 is not provided.
  • the oscillating portion 64 when the oscillating portion 64 is operated to the first position A1 by the lifting motor 56, the operating portion 64d of the oscillating portion 64 is positioned at the upper end portion of the long hole 121a of the oscillating portion 121. Therefore, the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position.
  • the operating portion 64d of the swinging portion 64 does not have the long hole of the swinging portion 121. Only by moving along 121a, the rocking portion 121 is not rocked, and the planting clutch 21 and the fertilizing clutch 22 are maintained in the disengaged position.
  • the operating lever 78 In a state where the engine 34 is stopped, the operating lever 78 is operated to, for example, the second descending position D2, to the neutral position N, and then to the second descending position D2 again. Is operated in a specific direction, the elevating/lowering control unit 101 (control device 100) operates the elevating/lowering motor 56 to operate the arm portion 55c of the operation shaft 55 to the fourth position A4, and the planting clutch 21 and The fertilizer application clutch 22 may be operated to the transmission position.
  • the planting clutch 21 that operates and stops the seedling planting device 6 is generally provided with a fixed position stopping function.
  • the fixed position stopping function of the planting clutch 21 is a state in which both of the two sets of planting arms 11 of the rotating case 10 are located above the rice field G (for example, one planting arm 11 planting seedlings on the rice field G). Is a little higher than the rice field surface G and the other planting arm 11 immediately before taking out the seedling from the lower part of the seedling stand 13), the rotation case 10 is stopped and fixed.
  • the planting clutch 21 can be operated to the transmission position as described above with the engine 34 stopped, the fixed position stop function does not work, and the operator manually rotates the rotating case 10. This makes it easy to perform various maintenance work.
  • the lift control unit 101 (control device 100) operates the lift motor 56 to operate the arm unit of the operation shaft 55.
  • 55c may be operated to the second position A2, and the spool 24a of the control valve 24 may be pushed to the neutral stop position in preference to the wire 43 and the operation arm 44.
  • the above-described lifting control unit 101 performs the operation. It may be configured not to.
  • an arch-shaped operation arm 122 may be provided at the front end of the machine body 3 in a front view, and the operation arm 122 extends from the standing posture and the machine body 3 shown in FIG. 1 to the front side. It is supported so that it can be used in different postures.
  • the operation arm 122 is operated in a standing posture.
  • the operator standing in front of the machine body 3 holds the operating arm 122 in the use posture to lift the front part of the machine body 3 up. It can be pressed or the orientation of the machine body 3 can be corrected.
  • a tact switch type engine stop switch (not shown) may be provided above the operation arm 122.
  • the operator operates the engine stop switch to stop the engine 34, and at the same time, the buzzer and the like are operated. An alarm sounds.
  • the upper limit position switch (not shown) (corresponding to the upper limit position detection unit) for detecting that the link mechanism 4 has reached the upper limit position by eliminating the angle sensor 79, and that the link mechanism 4 has reached the lower limit position.
  • a lower limit position switch (not shown) for detection (corresponding to a lower limit position detection unit) may be separately provided.
  • the present invention is not limited to a riding type rice transplanter, but a riding type direct seeding device equipped with a seeding device (corresponding to a working device) (not shown) for feeding seeds to a rice field G, and a feeding device for supplying a drug to the rice field G. It can also be applied to a riding type spreader equipped with (corresponding to a working device) (not shown).

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transplanting Machines (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Guiding Agricultural Machines (AREA)

Abstract

[Problem] To improve control valve operability and work clutch operability of a paddy field work machine. [Solution] This paddy field work machine is provided with a control valve 24 for supplying and exhausting operating oil to and from a hydraulic cylinder 5 to activate the hydraulic cylinder 5, and lifting/lowering linkage mechanisms 43, 44 for maintaining the work device at a set height H1 from a paddy surface G by operating the control valve 24. The paddy field work machine is also provided with a lifting/lowering actuator 56 capable of operating the control valve 24 and the work clutch 21, a human-operable manipulator 78, and a lifting/lowering control unit 101 for activating the lifting/lowering actuator 56 on the basis of an operation of the manipulator 78. The lifting/lowering control unit 101, when the manipulator 78 has been operated into an up position U2, activates the lifting/lowering actuator 56 so that the work clutch 21 is operated to a disengaged position and, with priority over the lifting/lowering linkage mechanisms 43, 44, the control valve 24 is operated to and maintained in an upward activation position.

Description

水田作業機Paddy work machine
　本発明は、乗用型田植機や乗用型直播機等の水田作業機において、作業装置の昇降操作の構成に関する。 The present invention relates to a configuration for lifting and lowering a working device in a paddy working machine such as a riding type rice transplanter and a riding type direct seeding machine.
　水田作業機の一例である乗用型田植機では、特許文献１に開示されているように、苗植付装置が機体に昇降可能に支持されて、苗植付装置を昇降操作する油圧シリンダと、油圧シリンダに作動油を給排操作する機械操作型式の制御弁と、人為的に操作される昇降操作レバーとが備えられたものがある。 In a riding-type rice transplanter, which is an example of a paddy field working machine, as disclosed in Patent Document 1, a seedling planting device is supported by a machine body so as to be able to move up and down, and a hydraulic cylinder that operates the seedling planting device to move up and down. 2. Description of the Related Art Some hydraulic cylinders are provided with a machine-operated control valve for supplying and discharging hydraulic oil, and an artificially operated lift control lever.
　昇降操作レバーによって、制御弁が上昇作動位置、中立停止位置及び下降作動位置に操作されることにより、油圧リンダが作動して、苗植付装置が昇降操作される。
　苗植付装置に動力を伝動及び遮断可能な植付クラッチが備えられて、昇降操作レバーにより植付クラッチが伝動位置及び遮断位置に操作されることにより、苗植付装置が作動及び停止する。 By operating the control valve to the raising operation position, the neutral stop position and the lowering operation position by the raising/lowering operation lever, the hydraulic linder operates and the seedling planting device is raised/lowered.
The seedling planting device is provided with a planting clutch capable of transmitting and shutting off power, and the raising and lowering operation lever operates the planting clutch to the transmission position and the shut-off position, whereby the seedling planting device operates and stops.
　特許文献１では、苗植付装置に昇降可能に支持されて田面に接地追従するフロートが備えられ、制御弁とフロートとに亘ってワイヤが接続されている。フロートに対する苗植付装置の高さが、ワイヤを介して機械的に制御弁に伝達されて、苗植付装置が田面から設定高さに維持されるように、フロート及びワイヤにより制御弁が自動的に操作される。
　苗植付装置が田面から設定高さに維持されることにより、苗植付装置による苗の植付深さが設定植付深さに維持される。 In Patent Document 1, a float that is supported by the seedling planting apparatus so as to be able to move up and down and that follows the ground contact with the rice field is provided, and a wire is connected across the control valve and the float. The height of the seedling planting device with respect to the float is mechanically transmitted to the control valve via the wire, and the control valve is automatically operated by the float and the wire so that the seedling planting device is maintained at the set height from the rice field. Operated.
By maintaining the seedling planting device at the set height from the rice field, the seedling planting depth of the seedling planting device is maintained at the set planting depth.
特開２００８－２３７０６２号公報Japanese Patent Laid-Open No. 2008-237062
　特許文献１では、作業者が昇降操作レバーを操作することによって、昇降操作レバーにより制御弁が中立停止位置、上昇作動位置及び下降作動位置に操作され、昇降操作レバーにより作業クラッチが伝動位置及び遮断位置に操作される。この場合、昇降操作レバーの操作ストロークが大きなものになっているので、操作性の面で改善の余地がある。 In Patent Document 1, when a worker operates an elevating operation lever, the elevating operation lever operates a control valve to a neutral stop position, an ascending operation position, and a descending operation position, and an elevating operation lever causes a work clutch to a transmission position and a disengagement position. Operated in position. In this case, since the operation stroke of the elevating operation lever is large, there is room for improvement in terms of operability.
　本発明は、水田作業機において、制御弁の操作性を向上させること、及び、作業装置に動力を伝動及び遮断可能な作業クラッチの操作性を向上させることを目的としている。 The present invention is intended to improve the operability of a control valve in a paddy work machine, and to improve the operability of a work clutch capable of transmitting and disconnecting power to a work device.
　本発明の水田作業機は、機体に昇降可能に支持された作業装置と、前記作業装置に動力を伝動及び遮断可能な作業クラッチと、前記作業装置を昇降操作する油圧シリンダと、前記油圧シリンダに作動油を給排操作して、前記油圧シリンダを作動させる制御弁と、前記制御弁を操作して、前記作業装置を田面から設定高さに維持する昇降連係機構とが備えられ、前記制御弁及び前記作業クラッチを操作可能な昇降アクチュエータと、人為的に操作可能な操作具と、前記操作具の操作に基づいて前記昇降アクチュエータを作動させる昇降制御部とが備えられて、前記昇降制御部は、前記操作具が上昇位置に操作されると、前記作業クラッチが遮断位置に操作され、且つ、前記昇降連係機構に優先して前記制御弁が上昇作動位置に操作されて維持されるように、前記昇降アクチュエータを作動させる。 The paddy work machine of the present invention includes a work device supported by a machine body so as to be able to move up and down, a work clutch capable of transmitting and shutting off power to the work device, a hydraulic cylinder for operating the work device up and down, and a hydraulic cylinder. A control valve for supplying/discharging hydraulic oil to operate the hydraulic cylinder, and an elevating/lowering mechanism for operating the control valve to maintain the working device at a set height from a field are provided. And a lifting actuator that can operate the work clutch, an operation tool that can be artificially operated, and a lifting control unit that operates the lifting actuator based on the operation of the operation tool, and the lifting control unit is When the operating tool is operated to the raised position, the work clutch is operated to the disengaged position, and the control valve is operated to and maintained at the raised operating position in preference to the elevating and lowering mechanism. The lifting actuator is operated.
　本発明によると、昇降連係機構により制御弁が操作されて、作業装置が田面から設定高さに維持された状態において、操作具が上昇位置に操作されると、昇降アクチュエータの作動に基づいて、作業クラッチが遮断位置に操作され、昇降連係機構に優先して制御弁が上昇作動位置に操作されて、作業装置が上昇操作される。
　操作具が上昇位置に操作された後に上昇位置に維持されなくても、昇降アクチュエータの作動に基づいて、作業クラッチが遮断位置に維持され、制御弁が上昇作動位置に維持されるので、作業装置の上昇操作は続行される。 According to the present invention, when the control valve is operated by the elevator linkage mechanism and the operating device is operated to the elevated position in the state where the working device is maintained at the set height from the rice field, based on the operation of the elevator actuator, The work clutch is operated to the disengagement position, the control valve is operated to the raising actuation position in preference to the raising/lowering linkage mechanism, and the working device is raised.
Even if the operating tool is not maintained in the raised position after being operated in the raised position, the work clutch is maintained in the disengaged position and the control valve is maintained in the raised operation position based on the operation of the lifting actuator. The ascent operation is continued.
　本発明によると、操作具の操作による昇降アクチュエータの作動に基づいて、制御弁が上昇作動位置に操作され、作業クラッチが遮断位置に操作される。
　これにより、操作具の操作ストロークを小さなものに設定しても、昇降アクチェータの作動に基づいて、制御弁及び作業クラッチが無理なく操作され、制御弁の操作抵抗及び作業クラッチの操作抵抗が操作具に掛からないのであり、操作具による制御弁の操作性及び作業クラッチの操作性が向上する。 According to the present invention, the control valve is operated to the raising operation position and the work clutch is operated to the disengagement position based on the operation of the elevating actuator by the operation of the operation tool.
As a result, even if the operation stroke of the operation tool is set to a small value, the control valve and the work clutch are operated without difficulty based on the operation of the lifting actuator, and the operation resistance of the control valve and the operation clutch are reduced. Therefore, the operability of the control valve by the operation tool and the operability of the work clutch are improved.
　本発明において、前記昇降制御部は、前記操作具が下降位置に操作されると、前記作業クラッチが遮断位置に操作され、且つ、前記昇降連係機構により前記制御弁が操作される状態に維持されるように、前記昇降アクチュエータを作動させると好適である。 In the present invention, when the operation tool is operated to the descending position, the elevating controller is maintained in a state in which the work clutch is operated to the disengaged position and the control valve is operated by the elevating and lowering linkage mechanism. Thus, it is preferable to operate the lifting actuator.
　本発明によれば、操作具が下降位置に操作されると、昇降アクチュエータの作動に基づいて、作業クラッチが遮断位置に操作（維持）され、昇降連係機構により制御弁が操作される状態が設定される。 According to the present invention, when the operating tool is operated to the lowered position, the working clutch is operated (maintained) to the disengaged position based on the operation of the lifting actuator, and the control valve is operated by the lifting linkage mechanism. To be done.
　作業装置が田面から上昇した状態で、昇降連係機構により制御弁が操作される状態になると、昇降連係機構により制御弁が下降作動位置に操作されて、作業装置が下降操作される。
　操作具が下降位置に操作された後に下降位置に維持されなくても、昇降アクチュエータの作動に基づいて、作業クラッチが遮断位置に維持され、昇降連係機構により制御弁が操作される状態が維持されるので、作業装置の下降操作は続行される。 When the control valve is operated by the elevating and lowering linkage mechanism in a state where the work device is lifted from the field, the control valve is operated to the lowering operation position by the elevating and lowering linkage mechanism, and the working device is lowered.
Even if the operating tool is not maintained in the lowered position after being operated in the lowered position, the work clutch is maintained in the disengaged position based on the operation of the lifting actuator, and the state in which the control valve is operated by the lifting linkage mechanism is maintained. Therefore, the descending operation of the working device is continued.
　作業装置が下降して、作業装置が田面から設定高さの位置に達すると、昇降連係機構により制御弁が中立停止位置に操作されて、作業装置の下降操作が停止される。この後、昇降連係機構により制御弁が操作されて、作業装置が田面から設定高さに維持される。 When the work device descends and reaches the position of the set height from the rice field, the elevator valve mechanism operates the control valve to the neutral stop position to stop the descending operation of the work device. After that, the control valve is operated by the elevating and lowering mechanism, and the working device is maintained at the set height from the rice field.
　本発明によると、操作具の操作による昇降アクチュエータの作動に基づいて、制御弁が上昇作動位置及び下降作動位置に操作され、作業クラッチが遮断位置に操作される。
　これにより、操作具の操作ストロークを小さなものに設定しても、昇降アクチェータの作動に基づいて、制御弁及び作業クラッチが無理なく操作され、制御弁の操作抵抗及び作業クラッチの操作抵抗が操作具に掛からないのであり、操作具による制御弁の操作性及び作業クラッチの操作性が向上する。 According to the present invention, the control valve is operated to the ascending operation position and the descending operation position and the work clutch is operated to the disengagement position based on the operation of the elevating actuator by the operation of the operation tool.
As a result, even if the operation stroke of the operation tool is set to a small value, the control valve and the work clutch are operated without difficulty based on the operation of the lifting actuator, and the operation resistance of the control valve and the operation clutch are reduced. Therefore, the operability of the control valve by the operation tool and the operability of the work clutch are improved.
　本発明において、前記昇降制御部は、前記操作具が下降位置に操作されてから再び下降位置に操作されると、前記昇降連係機構により前記制御弁が操作される状態が維持されながら、前記作業クラッチが伝動位置に操作されるように、前記昇降アクチュエータを作動させると好適である。 In the present invention, when the operating tool is operated to the descending position and then to the descending position again, the elevating controller controls the work while maintaining a state in which the control valve is operated by the elevating linkage mechanism. It is preferable to operate the lifting actuator so that the clutch is operated to the transmission position.
　本発明によれば、操作具が下降位置に操作されてから再び下降位置に操作されると、昇降アクチュエータの作動に基づいて、昇降連係機構により制御弁が操作される状態が維持されながら、作業クラッチが伝動位置に操作されるのであり、作業装置による作業が開始される。 According to the present invention, when the operating tool is operated to the descending position and then to the descending position again, the work is performed while the control valve is maintained to be operated by the elevating mechanism based on the operation of the elevating actuator. The clutch is operated to the transmission position, and the work by the work device is started.
　本発明によると、操作具の操作による昇降アクチュエータの作動に基づいて、制御弁が上昇作動位置及び下降作動位置に操作され、作業クラッチが伝動位置及び遮断位置に操作される。
　これにより、操作具の操作ストロークを小さなものに設定しても、昇降アクチェータの作動に基づいて、制御弁及び作業クラッチが無理なく操作され、制御弁の操作抵抗及び作業クラッチの操作抵抗が操作具に掛からないのであり、操作具による制御弁の操作性及び作業クラッチの操作性が向上する。 According to the present invention, the control valve is operated to the ascending operation position and the descending operation position and the work clutch is operated to the transmission position and the disengagement position based on the operation of the elevating actuator by the operation of the operation tool.
As a result, even if the operation stroke of the operation tool is set to a small value, the control valve and the work clutch are operated without difficulty based on the operation of the lifting actuator, and the operation resistance of the control valve and the operation clutch are reduced. Therefore, the operability of the control valve by the operation tool and the operability of the work clutch are improved.
　本発明において、前記作業装置の昇降範囲の上限位置に前記作業装置が上昇したことを検出する上限位置検出部が備えられ、前記昇降制御部は、前記上限位置検出部により前記作業装置が前記上限位置に上昇したことが検出されると、前記昇降連係機構に優先して前記制御弁が前記中立停止位置に操作されるように、前記昇降アクチュエータを作動させると好適である。 In the present invention, an upper limit position detection unit that detects that the work device is lifted is provided at an upper limit position of a lifting range of the work device, and the lift control unit includes the upper limit position detection unit to limit the work device to the upper limit. It is preferable that the lift actuator is operated so that the control valve is operated to the neutral stop position in preference to the lift linkage mechanism when it is detected that the lift valve has been lifted to the position.
　本発明によると、昇降アクチュエータの作動に基づいて、制御弁が上昇作動位置に維持されて、作業装置が上昇操作された場合、作業装置が上限位置に達すると、昇降アクチュエータの作動に基づいて、昇降連係機構に優先して制御弁が中立停止位置に操作される。
　これにより、作業者が操作具を操作しなくても、作業装置が上限位置で無理なく停止するのであり、操作具による制御弁の操作性が良いものなる。 According to the present invention, based on the operation of the lifting actuator, the control valve is maintained in the lifted operating position, and when the working device is lifted, when the working device reaches the upper limit position, based on the operation of the lifting actuator, The control valve is operated to the neutral stop position in preference to the elevator linkage mechanism.
As a result, even if the operator does not operate the operation tool, the work device can be reasonably stopped at the upper limit position, and the operability of the control valve by the operation tool is improved.
　本発明において、前記作業装置の昇降範囲の下限位置に前記作業装置が下降したことを検出する下限位置検出部が備えられ、前記昇降制御部は、前記下限位置検出部により前記作業装置が前記下限位置に下降したことが検出されると、前記昇降連係機構に優先して前記制御弁が前記中立停止位置に操作されるように、前記昇降アクチュエータを作動させると好適である。 In the present invention, a lower limit position detection unit that detects that the working device is lowered is provided at a lower limit position of an elevating range of the working device, and the elevating and lowering control unit includes the lower limit position detection unit to limit the working device to the lower limit. It is preferable to operate the lift actuator such that the control valve is operated to the neutral stop position in preference to the lift linkage mechanism when it is detected that the lift actuator is lowered to the position.
　本発明によると、例えば路上等において、昇降アクチュエータの作動に基づいて、昇降連係機構により制御弁が操作される状態に維持された状態で、作業装置が下限位置に達すると、昇降アクチュエータの作動に基づいて、昇降連係機構に優先して制御弁が中立停止位置に操作される。
　これにより、作業者が操作具を操作しなくても、作業装置が下限位置で無理なく停止するのであり、操作具による制御弁の操作性が良いものなる。 According to the present invention, for example, on a road or the like, when the working device reaches the lower limit position in a state where the control valve is operated by the elevator linkage mechanism based on the operation of the elevator actuator, the elevator actuator is activated. Based on this, the control valve is operated to the neutral stop position with priority over the lifting and lowering linkage mechanism.
As a result, even if the operator does not operate the operation tool, the work device can be reasonably stopped at the lower limit position, and the operability of the control valve by the operation tool is improved.
　本発明において、前記作業装置に昇降可能に支持されて田面に接地追従するフロートと、前記制御弁と前記フロートとに亘って設けられ、前記フロートに対する前記作業装置の高さを前記制御弁に機械的に伝達し前記制御弁を操作して、前記作業装置を田面から前記設定高さに維持する前記昇降連係機構とが備えられていると好適である。 In the present invention, a float that is supported by the working device so as to be able to move up and down, and that follows the ground contact with the rice field, is provided over the control valve and the float, and the height of the working device with respect to the float is controlled by the control valve. It is preferable that the lifting and lowering linkage mechanism is provided to maintain the working device at the set height from the rice field by operating the control valve.
　本発明によると、フロートが田面に接地追従する状態において、フロートに対する作業装置の高さが、昇降連係機構により制御弁に機械的に伝達され、制御弁が操作されて、作業装置が田面から設定高さに維持される。 According to the present invention, the height of the working device with respect to the float is mechanically transmitted to the control valve by the lifting and lowering linkage mechanism, and the control valve is operated to set the working device from the rice field in a state where the float follows the ground contact with the paddy field. Maintained at height.
　作業装置が田面から上昇した状態では作業装置に対してフロートが下降しているので、昇降連係機構により制御弁が操作される状態になると、昇降連係機構により制御弁が下降作動位置に操作されて、作業装置が下降操作される。 Since the float is descending with respect to the work device when the work device is raised from the field, when the control valve is operated by the elevating and lowering mechanism, the control valve is operated to the lowering operation position by the elevating and lowering mechanism. The working device is lowered.
　作業装置が下降して、フロートが田面に接地すると、作業装置に対してフロートが上昇するのであり、作業装置が田面から設定高さの位置に達すると、昇降連係機構により制御弁が中立停止位置に操作されて、作業装置の下降操作が停止される。
　この後、フロートに対する作業装置の高さが、昇降連係機構により制御弁に機械的に伝達され、制御弁が操作されて、作業装置が田面から設定高さに維持される。 When the work equipment descends and the float touches the rice field, the float rises with respect to the work equipment.When the work equipment reaches the set height position from the rice field, the elevator linkage mechanism causes the control valve to move the control valve to the neutral stop position. And the lowering operation of the working device is stopped.
After that, the height of the work device with respect to the float is mechanically transmitted to the control valve by the lifting and lowering linkage mechanism, and the control valve is operated to maintain the work device at the set height from the paddy field.
　本発明によると、昇降連係機構により制御弁が操作される状態において、田面に接地追従するフロート及び昇降連係機構により制御弁が操作されることにより、制御弁の操作の確実性及び信頼性が高いものとなる。 According to the present invention, in the state where the control valve is operated by the elevator linkage mechanism, the float that follows the ground contact with the rice field and the control valve that is operated by the elevator linkage mechanism have high reliability and reliability of the operation of the control valve. Will be things.
　本発明において、前記制御弁が前記下降作動位置に付勢されて、前記昇降連係機構は、
　前記作業装置が田面から前記設定高さに位置していると、前記制御弁を前記中立停止位置に止め、前記フロートが前記作業装置に対して上昇すると、前記制御弁を前記上昇作動位置に押し操作し、前記フロートが前記作業装置に対して下降すると、前記制御弁の前記下降作動位置への作動を許容し、前記昇降アクチュエータは、前記昇降連係機構とは別に、前記制御弁を前記上昇作動位置に押し操作し、前記制御弁を前記中立停止位置に止め、前記制御弁の前記下降作動位置への作動を許容すると好適である。 In the present invention, the control valve is biased to the lowering operation position, and the lifting and lowering linkage mechanism is
When the working device is located at the set height from the rice field, the control valve is stopped at the neutral stop position, and when the float rises with respect to the working device, the control valve is pushed to the rising operating position. When the float is lowered with respect to the working device by operating the control valve, the control valve is allowed to move to the lowering operation position, and the lifting actuator separates the control valve from the lifting operation mechanism. It is preferable that the control valve is pushed to a position, the control valve is stopped at the neutral stop position, and the operation of the control valve to the descending operation position is allowed.
　本発明によると、昇降アクチュエータ及び昇降連係機構が、並列的な状態で、制御弁を止め操作及び押し操作して、制御弁を操作することができる。
　これにより、昇降アクチュエータの作動に基づいて、昇降連係機構に優先して制御弁が上昇作動位置及び中立停止位置に操作される状態が無理なく得られるのであり、昇降連係機構により制御弁が操作される状態が無理なく設定される。 According to the present invention, the elevating actuator and the elevating mechanism can operate the control valve by stopping and pushing the control valve in a parallel state.
As a result, based on the operation of the lifting actuator, it is possible to reasonably obtain a state in which the control valve is operated to the raising operation position and the neutral stop position in preference to the lifting linkage mechanism, and the control valve is operated by the lifting linkage mechanism. State is set reasonably.
　本発明において、前記中立停止位置を間に挟んで、一方側の前記上昇作動位置及び他方側の前記下降作動位置にスライド可能なスプールが、前記制御弁に設けられ、前記スプールが前記下降作動位置に付勢されて、前記昇降連係機構の操作部と前記昇降アクチュエータの操作部とが、前記スプールの端部に対向して並ぶように配置されて、前記昇降連係機構の操作部と前記昇降アクチュエータの操作部とが別々に、前記スプールを前記下降作動位置から、前記中立停止位置及び前記上昇作動位置に押し操作すると好適である。 In the present invention, the control valve is provided with a spool slidable between the rising operation position on one side and the lowering operation position on the other side with the neutral stop position interposed therebetween, and the spool is provided in the lowering operation position. The operating portion of the lifting/lowering linkage mechanism and the operating portion of the lifting/lowering actuator are arranged so as to line up to face the end of the spool. It is preferable that the operating section separately pushes the spool from the lowering operation position to the neutral stop position and the rising operation position.
　本発明によると、昇降連係機構の操作部と昇降アクチュエータの操作部とが、制御弁のスプールの端部に対向して並ぶように配置されることにより、前述のように昇降アクチュエータ及び昇降連係機構が、並列的な状態で制御弁を操作する構成を容易に得ることができるので、構造の簡素化の面で有利なものとなる。 According to the present invention, the operating portion of the lifting/lowering linkage mechanism and the operating portion of the lifting/lowering actuator are arranged so as to face the end of the spool of the control valve, so that the lifting/lowering actuator and the lifting/lowering linkage mechanism are arranged as described above. However, since it is possible to easily obtain a configuration for operating the control valves in a parallel state, it is advantageous in terms of simplification of the structure.
　本発明において、作業行程の指標を田面に形成する作業位置、及び田面から上側の格納位置に昇降可能に支持された右及び左のマーカーと、前記作業装置が田面から上昇操作されるのに伴って、右及び左の前記マーカーを前記格納位置に操作し、前記作業装置が田面に下降操作されるのに伴って、右及び左の前記マーカーを前記作業位置に操作する右及び左のマーカー操作機構と、前記格納位置に操作された右及び左の前記マーカーを、前記マーカー操作機構に優先して前記格納位置に保持する右及び左のマーカー保持機構とが備えられ、右及び左の前記マーカー保持機構を解除位置に操作可能なマーカーアクチュエータと、前記操作具の操作に基いて前記マーカーアクチュエータを作動させるマーカー制御部とが備えられて、前記マーカー制御部は、前記操作具が右マーカー位置に操作されると、右の前記マーカー保持機構が解除位置に操作されるように、前記マーカーアクチュエータを作動させ、前記操作具が左マーカー位置に操作されると、左の前記マーカー保持機構が解除位置に操作されるように、前記マーカーアクチュエータを作動させると好適である。 In the present invention, a work position for forming an index of a work stroke on the rice field, and right and left markers supported up and down from the rice field to a storage position on the upper side, and the work device is lifted from the rice field. And operating the right and left markers to the storage position, and operating the right and left markers to the working position as the working device is lowered to the field surface. A right and left marker holding mechanism for holding the right and left markers operated to the storage position in the storage position in preference to the marker operating mechanism, and a right and left marker. A marker actuator that can operate the holding mechanism to the release position and a marker control unit that operates the marker actuator based on the operation of the operation tool are provided, and the marker control section is configured such that the operation tool is at the right marker position. When operated, the marker actuator is operated so that the right marker holding mechanism is operated to the release position, and when the operation tool is operated to the left marker position, the left marker holding mechanism is released to the release position. It is preferable to operate the marker actuator so that the marker actuator is operated.
　水田作業機では、右及び左のマーカーが備えられたものがあり、右及び左のマーカーは作業行程の指標を田面に形成する作業位置、及び田面から上側の格納位置に昇降可能に支持されて、マーカー操作機構及びマーカー保持機構が備えられている。 Some paddy working machines are provided with right and left markers, and the right and left markers are supported so that they can be moved up and down from a working position to form an index of a working process on a rice field and a storage position above the rice field. A marker operating mechanism and a marker holding mechanism are provided.
　作業装置が田面から上昇操作されるのに伴って、マーカー操作機構により右及び左のマーカーが格納位置に操作され、作業装置が田面に下降操作されるのに伴って、右及び左のマーカーが作業位置に操作される。
　この場合、マーカー保持機構により、格納位置に操作された右及び左のマーカーを、マーカー操作機構に優先して格納位置に保持することができるのであり、右及び左のマーカーを格納位置に保持した状態で、作業装置が田面に下降操作されても、右及び左のマーカーは格納位置に保持されて作業位置に操作されない。 As the working device is lifted from the rice field, the right and left markers are moved to the storage position by the marker operating mechanism, and the right and left markers are moved as the working device is lowered to the rice field. Operated to the working position.
In this case, the marker holding mechanism can hold the right and left markers operated to the storage position at the storage position in preference to the marker operation mechanism, and the right and left markers are held at the storage position. In this state, even if the work device is lowered to the field, the right and left markers are held in the storage position and are not moved to the work position.
　右及び左のマーカーが格納位置に保持された状態で、作業装置が田面に下降操作された後、例えば右のマーカー保持機構が解除位置に操作されると、マーカー操作機構により右のマーカーが作業位置に操作される。 With the right and left markers held in the retracted position, the working device is lowered to the rice field, and when the right marker holding mechanism is operated to the release position, the marker operation mechanism operates the right marker. Operated in position.
　本発明によれば、前述の状態において操作具が右マーカー位置に操作されると、マーカーアクチュエータの作動に基づいて、右のマーカー保持機構が解除位置に操作されるのであり、格納位置の右のマーカーが作業位置に操作される。
　操作具が左マーカー位置に操作されると、マーカーアクチュエータの作動に基づいて、左のマーカー保持機構が解除位置に操作されるのであり、格納位置の左のマーカーが作業位置に操作される。 According to the present invention, when the operating tool is operated to the right marker position in the above-mentioned state, the right marker holding mechanism is operated to the release position based on the operation of the marker actuator. The marker is moved to the working position.
When the operating tool is operated to the left marker position, the left marker holding mechanism is operated to the release position based on the operation of the marker actuator, and the left marker at the storage position is operated to the working position.
　以上のように本発明によると、操作具の操作によるマーカーアクチュエータの作動に基づいて、右及び左のマーカー保持機構が解除位置に操作される。
　これにより、操作具の右マーカー位置及び左マーカー位置に亘る操作ストロークを、小さなものに設定しても、マーカーアクチェータにより右及び左のマーカー保持機構が無理なく解除位置に操作され、右及び左のマーカー保持機構の操作抵抗が操作具に掛からないのであり、操作具による右及び左のマーカー保持機構の操作性が向上する。 As described above, according to the present invention, the right and left marker holding mechanisms are operated to the release position based on the operation of the marker actuator by the operation of the operation tool.
As a result, even if the operation stroke across the right marker position and the left marker position of the operation tool is set to a small one, the marker actuators operate the right and left marker holding mechanisms to the release position without difficulty, and the right and left marker positions are set. Since the operation resistance of the marker holding mechanism is not applied to the operation tool, the operability of the right and left marker holding mechanisms by the operation tool is improved.
　本発明において、前記マーカー操作機構と前記マーカー保持機構と前記マーカーアクチュエータとが、前記油圧シリンダの近傍に配置されて、前記油圧シリンダによる前記作業装置の上昇操作に伴なって、前記油圧シリンダにより前記マーカー操作機構が操作されて、前記マーカーが前記格納位置に操作され、前記マーカーを前記格納位置に操作した前記マーカー操作機構が、前記マーカー保持機構により保持されることにより、前記マーカーが前記格納位置に保持され、前記油圧シリンダにより前記作業装置が田面に下降操作された状態において、前記マーカー保持機構が、前記マーカーアクチェータにより前記解除位置に操作されることにより、前記格納位置の前記マーカーが前記作業位置に操作されると好適である。 In the present invention, the marker operating mechanism, the marker holding mechanism, and the marker actuator are arranged in the vicinity of the hydraulic cylinder, and the hydraulic cylinder causes the hydraulic cylinder to move the lifting operation of the working device by the hydraulic cylinder. When the marker operating mechanism is operated, the marker is operated to the storage position, and the marker operating mechanism that operates the marker to the storage position is held by the marker holding mechanism, so that the marker is moved to the storage position. The marker holding mechanism is operated to the release position by the marker actuator in a state in which the working device is lowered to the rice field by the hydraulic cylinder, and the marker in the storage position is operated by the marker holding mechanism. It is preferable to be operated to the position.
　本発明によると、前述のように作業装置が田面から上昇操作されるのに伴って、マーカー操作機構により右及び左のマーカーが格納位置に操作されるように構成する場合、作業装置を昇降操作する油圧シリンダの近傍にマーカー操作機構が配置されて、油圧シリンダによりマーカー操作機構が操作される。
　これにより、油圧シリンダが、マーカー操作機構の動力源に兼用されるので、構造の簡素化の面に有利なものとなる。 According to the present invention, in the case where the marker operating mechanism operates the right and left markers to the storage position as the working device is lifted from the rice field as described above, the working device is lifted and lowered. The marker operating mechanism is arranged in the vicinity of the hydraulic cylinder, and the marker operating mechanism is operated by the hydraulic cylinder.
As a result, the hydraulic cylinder is also used as the power source of the marker operating mechanism, which is advantageous in terms of simplification of the structure.
　本発明によると、油圧シリンダの近傍にマーカー操作機構が配置された場合、マーカー保持機構及びマーカーアクチュエータも、油圧シリンダの近傍に配置されることにより、マーカー操作機構、マーカー保持機構及びマーカーアクチュエータが互いに近接して配置される。
　これにより、マーカー保持機構によりマーカー操作機構が格納位置で保持される構造、及びマーカーアクチェータによりマーカー保持機構が解除位置に操作される構造が、簡素に構成されるようになり、構造の簡素化の面に有利なものとなる。 According to the present invention, when the marker operating mechanism is arranged in the vicinity of the hydraulic cylinder, the marker holding mechanism and the marker actuator are also arranged in the vicinity of the hydraulic cylinder so that the marker operating mechanism, the marker holding mechanism and the marker actuator are mutually arranged. Placed in close proximity.
As a result, the structure in which the marker holding mechanism holds the marker operating mechanism at the retracted position and the structure in which the marker holding mechanism operates the marker holding mechanism to the release position are simplified, and the structure is simplified. It will be advantageous in terms of aspects.
乗用型田植機の左側面図である。It is a left side view of a riding type rice transplanter. 苗植付装置の横断平面図である。It is a cross-sectional plan view of the seedling planting apparatus. フロートの付近の左側面図である。It is a left side view near the float. 昇降モータ及び制御弁、第１の作業連係機構の付近の右側面図である。FIG. 4 is a right side view in the vicinity of a lifting motor, a control valve, and a first work linkage mechanism. 制御弁及び操作軸の付近の右側面図である。It is a right side view near a control valve and an operation shaft. 制御弁、操作軸及び操作アーム、ワイヤ等の分解斜視図である。It is an exploded perspective view of a control valve, an operation shaft, an operation arm, a wire, etc. 制御弁、操作軸及び操作アームの付近の正面図である。FIG. 3 is a front view of the vicinity of a control valve, an operation shaft and an operation arm. 制御弁、遮断位置に操作された植付クラッチ及び施肥クラッチ、第１及び第２の作業連係機構の付近の右側面図である。FIG. 6 is a right side view of the control valve, the planting clutch and the fertilizer application clutch that are operated in the shutoff position, and the vicinity of the first and second work linkage mechanisms. 図８に示す状態から植付クラッチ及び施肥クラッチが伝動位置に操作された状態を示す右側面図である。FIG. 9 is a right side view showing a state where the planting clutch and the fertilizer application clutch are operated to the transmission position from the state shown in FIG. 8. 第１の作業連係機構における揺動部、融通部及び長さ調節部の付近の右側面図である。FIG. 6 is a right side view of the swing unit, the interchange unit, and the length adjusting unit in the first work linkage mechanism. 第１の作業連係機構における揺動部、融通部及び長さ調節部の付近の横断平面図である。FIG. 6 is a cross-sectional plan view in the vicinity of a swing part, an interchange part and a length adjusting part in the first work linkage mechanism. 植付クラッチ及び施肥クラッチの付近の右側面図である。It is a right side view near the planting clutch and the fertilizer application clutch. 植付クラッチ及び施肥クラッチの付近の横断平面図である。It is a cross-sectional top view of the vicinity of a planting clutch and a fertilizer application clutch. 植付クラッチの第１の操作部材及び連係部材の付近の縦断背面図である。It is a longitudinal rear view of the vicinity of the 1st operation member and link member of a planting clutch. 植付クラッチの第１の操作部材及び連係部材の分解斜視図である。It is a disassembled perspective view of the 1st operation member and link member of a planting clutch. マーカーモータの付近の左側面図である。It is a left side view near a marker motor. マーカーモータの付近の分解平面図である。It is a disassembled top view of the vicinity of a marker motor. マーカーモータの付近の分解斜視図である。It is an exploded perspective view of the vicinity of a marker motor. 制御装置と各部との連係状態を示す概略図である。It is a schematic diagram showing a state of cooperation between a control device and each part. 制御装置と各部との連係状態を示す概略図である。It is a schematic diagram showing a state of cooperation between a control device and each part. 畦際での旋回状態を示す平面図である。It is a top view showing the turning state at the edge. 操作レバーの操作位置に基づく制御の流れを示す図である。It is a figure which shows the flow of control based on the operation position of an operation lever. 操作レバーの操作位置に基づく制御の流れを示す図である。It is a figure which shows the flow of control based on the operation position of an operation lever. 操作レバーの操作位置に基づく制御の流れを示す図である。It is a figure which shows the flow of control based on the operation position of an operation lever. 発明の実施の第１別形態において、第１の作業連係機構における第１及び第２揺動部、融通部の付近の右側面図である。FIG. 16 is a right side view of the first work linkage mechanism in the vicinity of the first and second swinging parts and the interchange part in the first alternative embodiment of the invention. 発明の実施の第１別形態において、図２５に示す状態から植付クラッチ及び施肥クラッチが伝動位置に操作された状態を示す右側面図である。FIG. 26 is a right side view showing a state where the planting clutch and the fertilizer application clutch are operated to the transmission position from the state shown in FIG. 25 in the first another embodiment of the invention. 発明の実施の第１別形態において、第１の作業連係機構における第１及び第２揺動部、融通部の付近の横断平面図である。In 1st another form of implementation of invention, it is a cross-sectional top view of the 1st and 2nd rocking|fluctuation part in a 1st work cooperation mechanism, and the interchange part.
　図１～図２７に、水田作業機の一例である乗用型田植機が示されており、Ｆは前方向を示し、Ｂは後方向を示し、Ｕは上方向を示し、Ｄは下方向を示し、Ｒは右方向を示し、Ｌは左方向を示している。 1 to 27 show a riding-type rice transplanter, which is an example of a paddy working machine, where F indicates a front direction, B indicates a rear direction, U indicates an upward direction, and D indicates a downward direction. , R indicates the rightward direction, and L indicates the leftward direction.
（乗用型田植機の全体構成）
　図１に示すように、乗用型田植機は、右及び左の前輪１、右及び左の後輪２を備えた機体３の後部に、リンク機構４が上下に揺動可能に支持されて後側に延出されており、リンク機構４を昇降操作する油圧シリンダ５が設けられている。 (Overall structure of riding type rice transplanter)
As shown in FIG. 1, a riding-type rice transplanter is equipped with a link mechanism 4 supported on a rear part of a body 3 having right and left front wheels 1 and right and left rear wheels 2 so as to be vertically swingable. A hydraulic cylinder 5 that is extended to the side and that moves up and down the link mechanism 4 is provided.
　苗植付装置６（作業装置に相当）が、リンク機構４の後部に支持されている。機体３の後部及び苗植付装置６に亘って、田面Ｇに肥料を供給する施肥装置７が設けられており、苗植付装置６の前側の下部に、田面Ｇを整地する整地装置５０が支持されている。 A seedling planting device 6 (corresponding to a working device) is supported at the rear part of the link mechanism 4. A fertilizer application device 7 that supplies fertilizer to the paddy field G is provided across the rear part of the machine body 3 and the seedling planting device 6, and at the lower part of the front side of the seedling planting device 6, a leveling device 50 for leveling the paddy field G is provided. It is supported.
　機体３において、前後方向に沿った右及び左の機体フレーム６０が設けられており、機体フレーム６０の前部にミッションケース７３が連結され、ミッションケース７３の前部にエンジン３４が支持されている。 In the machine body 3, right and left machine body frames 60 along the front-rear direction are provided, a mission case 73 is connected to a front portion of the machine body frame 60, and an engine 34 is supported on a front portion of the mission case 73. ..
（苗植付装置の全体構成）
　図１及び図２に示すように、苗植付装置６に、支持フレーム８、フィードケース１４、植付伝動ケース９、回転ケース１０、植付アーム１１、フロート１２、苗のせ台１３等が設けられている。 (Overall structure of seedling planting equipment)
As shown in FIGS. 1 and 2, the seedling planting device 6 is provided with a support frame 8, a feed case 14, a planting transmission case 9, a rotating case 10, a planting arm 11, a float 12, a seedling stand 13, and the like. Has been.
　支持フレーム８は、アルミの引き抜き工法によって製作されており、台形状の断面形状を備えている（図３参照）。支持フレーム８が左右方向に沿って配置されており、支持フレーム８の左右中央部にフィードケース１４が連結され、２個の植付伝動ケース９が支持フレーム８の右部及び左部に連結されて後側に延出されている。 The support frame 8 is manufactured by the aluminum drawing method and has a trapezoidal cross-sectional shape (see FIG. 3). The support frame 8 is arranged along the left-right direction, the feed case 14 is connected to the left-right center of the support frame 8, and the two planted transmission cases 9 are connected to the right and left parts of the support frame 8. Is extended to the rear side.
　植付伝動ケース９の後部の右部及び左部に、回転ケース１０が回転可能に支持され、回転ケース１０の両端に、植付アーム１１が支持されている。苗のせ台１３が、左右方向に往復移動可能に支持されている。 The rotating case 10 is rotatably supported on the right and left portions of the rear part of the planted transmission case 9, and the planted arms 11 are supported on both ends of the rotatable case 10. A seedling stand 13 is supported so as to be capable of reciprocating in the left-right direction.
　エンジン３４の動力が、ミッションケース７３の内部の植付クラッチ２１（作業クラッチに相当）（図８及び図１９参照）から、伝動軸３５を介して、フィードケース１４の内部の伝動機構（図示せず）に伝達されて、フィードケース１４に設けられた横送り軸（図示せず）により、苗のせ台１３が所定のストロークで左右方向に往復横送り駆動される。 The power of the engine 34 is transmitted from the planted clutch 21 (corresponding to a work clutch) inside the transmission case 73 (see FIGS. 8 and 19) via the transmission shaft 35 to the transmission mechanism inside the feed case 14 (not shown). The seedling stand 13 is reciprocated laterally with a predetermined stroke by a lateral feed shaft (not shown) provided in the feed case 14 in a lateral direction.
　フィードケース１４の伝動機構に伝達された動力が、伝動軸３６、植付伝動ケース９の内部のトルクリミッター３７、伝動チェーン３８及び少数条クラッチ３９を介して、回転ケース１０に伝達される。苗のせ台１３が左右方向に往復横送り駆動されるのに伴って、回転ケース１０が回転駆動され、植付アーム１１が苗のせ台１３の下部から交互に苗を取り出して田面Ｇに植え付ける。 The power transmitted to the transmission mechanism of the feed case 14 is transmitted to the rotating case 10 via the transmission shaft 36, the torque limiter 37 inside the planted transmission case 9, the transmission chain 38 and the minority clutch 39. As the seedling stand 13 is driven to reciprocate laterally in the left-right direction, the rotating case 10 is rotationally driven, and the planting arms 11 alternately take out the seedlings from the lower part of the seedling stand 13 and plant them on the rice field G.
　支持フレーム８の右端部及び左端部の前後方向に沿った軸芯Ｐ１周りに、右及び左のマーカー２３が上下に搖動可能に支持されている。マーカー２３に、軸芯Ｐ１周りに搖動可能に支持フレーム８に支持されたアーム部２３ａと、アーム部２３ａの先端部で自由回転可能に支持された回転体２３ｂとが設けられている。 The right and left markers 23 are vertically swingably supported around the axis P1 along the front-rear direction of the right and left ends of the support frame 8. The marker 23 is provided with an arm portion 23a supported by the support frame 8 so as to be swingable around the axis P1 and a rotating body 23b supported by the tip of the arm portion 23a so as to be freely rotatable.
　図１９に示すように、マーカー２３は、田面Ｇに接地して作業行程の指標を田面Ｇに形成する作業位置Ｂ１、及び田面Ｇから上側の格納位置Ｂ２に昇降可能である。作業位置Ｂ１に操作されたマーカー２３の回転体２３ｂが田面Ｇに接地した状態で、機体３が進行することにより、マーカー２３の回転体２３ｂが回転しながら田面Ｇに指標を形成する。 As shown in FIG. 19, the marker 23 can be moved up and down from a work position B1 in which it touches the rice field G to form an index of a work process on the rice field G, and from the rice field G to an upper storage position B2. While the rotating body 23b of the marker 23 operated to the work position B1 is in contact with the rice field G, the machine body 3 advances to form an index on the rice field G while the rotating body 23b of the marker 23 rotates.
（施肥装置の全体構成）
　図１及び図２に示すように、施肥装置７に、ホッパー１５、繰り出し部１６、ブロア１７、作溝器１８及びホース１９等が設けられている。 (Overall structure of fertilizer application)
As shown in FIGS. 1 and 2, the fertilizer application device 7 is provided with a hopper 15, a feeding part 16, a blower 17, a groove making device 18, a hose 19, and the like.
　機体３において運転座席２０の後側に、肥料を貯留するホッパー１５及び繰り出し部１６が支持されており、繰り出し部１６の左の横外側にブロア１７が設けられている。フロート１２に作溝器１８が取り付けられて、４個の作溝器１８が設けられており、繰り出し部１６と作溝器１８とに亘って４本のホース１９が接続されている。 A hopper 15 for storing fertilizer and a feeding portion 16 are supported on the rear side of the driver's seat 20 in the airframe 3, and a blower 17 is provided on the left lateral outside of the feeding portion 16. The grooving device 18 is attached to the float 12, four grooving devices 18 are provided, and four hoses 19 are connected across the feeding portion 16 and the grooving device 18.
　エンジン３４の動力が、ミッションケース７３の内部の施肥クラッチ２２（図８及び図１９参照）を介して、伝動アーム８１に伝達される。伝動アーム８１は、左の機体フレーム６０を通って左外側に延出されており、左右方向の軸芯周りに回転駆動される。伝動アーム８１と繰り出し部１６とに亘って、伝動ロッド８２が接続されており、伝動ロッド８２は側面視で直線的に配置されている。 The power of the engine 34 is transmitted to the transmission arm 81 via the fertilizer application clutch 22 (see FIGS. 8 and 19) inside the mission case 73. The transmission arm 81 extends to the left outside through the left body frame 60, and is rotationally driven around the axis in the left-right direction. A transmission rod 82 is connected across the transmission arm 81 and the feeding portion 16, and the transmission rod 82 is linearly arranged in a side view.
　エンジン３４の動力が、施肥クラッチ２２及び伝動アーム８１を介して、伝動ロッド８２に伝達され、伝動ロッド８２が前後方向に沿って押し引き駆動されて、繰り出し部１６が駆動される。 The power of the engine 34 is transmitted to the transmission rod 82 via the fertilizer application clutch 22 and the transmission arm 81, and the transmission rod 82 is pushed and pulled along the front-rear direction to drive the feeding portion 16.
　ホッパー１５の肥料が、繰り出し部１６により繰り出され、ブロア１７の搬送風によりホース１９を通って作溝器１８に供給される。作溝器１８により田面Ｇに溝が形成されながら、肥料が作溝器１８から田面Ｇの溝に供給される。 The fertilizer in the hopper 15 is delivered by the delivery unit 16 and is supplied to the grooving device 18 through the hose 19 by the transport wind of the blower 17. The fertilizer is supplied from the grooving device 18 to the groove on the rice field G while the grooving device 18 forms the groove on the rice field G.
（整地装置の全体構成）
　図１及び図２に示すように、苗植付装置６の前部の下部において、支持フレーム８の前側に、田面Ｇを整地する整地装置５０が支持されている。 (Overall structure of leveling device)
As shown in FIG. 1 and FIG. 2, at the lower part of the front part of the seedling planting device 6, on the front side of the support frame 8, a leveling device 50 for leveling the rice field G is supported.
　支持フレーム８の左端部及び右端部に、右及び左の支持部材４５が連結されている。伝動軸３６と同一の軸芯Ｐ６周りに、伝動ケース４６が上下に揺動可能に左の支持部材４５に支持され、支持アーム４７が上下に揺動可能に右の支持部材４５に支持されている。 Right and left support members 45 are connected to the left and right ends of the support frame 8. A transmission case 46 is supported by a left support member 45 so as to be vertically swingable and a support arm 47 is supported by a right support member 45 so as to be vertically swingable around an axis P6 which is the same as the transmission shaft 36. There is.
　伝動ケース４６及び支持アーム４７の前部に亘って、駆動軸４８が回転可能に支持されて、多数の整地体５３が駆動軸４８に取り付けられている。伝動軸３６の動力が、植付伝動ケース９と伝動ケース４６とに亘って架設された伝動軸４９から、伝動ケース４６の内部のトルクリミッター５１及び伝動チェーン５２を介して、駆動軸４８に伝達される。 The drive shaft 48 is rotatably supported over the front of the transmission case 46 and the support arm 47, and a large number of ground leveling bodies 53 are attached to the drive shaft 48. The power of the transmission shaft 36 is transmitted to the drive shaft 48 from the transmission shaft 49 installed over the transmission case 9 with the plant and the transmission case 46 via the torque limiter 51 and the transmission chain 52 inside the transmission case 46. To be done.
　伝動軸３６の動力により、駆動軸４８及び整地体５３が、図１の反時計方向に回転駆動されて、整地体５３により田面Ｇの整地が行われる。図２及び図３に示すように、支持部材４５が前側に延出されて、支持部材４５の延出部分に亘って、カバー５４が取り付けられている。整地体５３によって後側に跳ね飛ばされる泥がカバー５４により止められて、フロート１２での泥の堆積が防止される。 The drive shaft 48 and the ground leveling body 53 are rotationally driven in the counterclockwise direction in FIG. 1 by the power of the transmission shaft 36, and the ground leveling body 53 performs leveling on the field G. As shown in FIGS. 2 and 3, the support member 45 extends to the front side, and the cover 54 is attached to the extended portion of the support member 45. The cover 54 stops the mud splashed to the rear side by the leveling body 53 and prevents the mud from accumulating on the float 12.
（苗植付装置の昇降操作用の制御弁及び昇降モータに関する構成）
　図４～図７及び図１９に示すように、油圧シリンダ５に作動油を給排操作する制御弁２４が、機体３の後部において、運転座席２０の下側に設けられている。制御弁２４は、油圧シリンダ５に作動油を供給して油圧シリンダ５を上昇作動（収縮作動）させる上昇作動位置、油圧シリンダ５から作動油を排出して油圧シリンダ５を下降作動（伸長作動）させる下降作動位置、及び油圧シリンダ５を停止させる中立停止位置に操作可能である。 (Structure related to control valve and lifting motor for lifting operation of seedling planting device)
As shown in FIGS. 4 to 7 and 19, a control valve 24 for supplying and discharging hydraulic oil to and from the hydraulic cylinder 5 is provided below the driver's seat 20 in the rear portion of the machine body 3. The control valve 24 supplies the hydraulic oil to the hydraulic cylinder 5 to raise the hydraulic cylinder 5 (contract operation) in an ascending position, and discharges the hydraulic oil from the hydraulic cylinder 5 to lower the hydraulic cylinder 5 (extend operation). It can be operated to a descending operation position for stopping and a neutral stop position for stopping the hydraulic cylinder 5.
　前後方向（図４及び図５の左右方向）にスライド操作可能なスプール２４ａが、制御弁２４に前向きに設けられている。制御弁２４のスプール２４ａは、中立停止位置を間に挟んで、一方側である制御弁２４に近い側の上昇作動位置、及び他方側である制御弁２４から遠い側の下降作動位置にスライド可能であり、制御弁２４の内部に設けられたバネ（図示せず）により、下降作動位置に付勢されている。 A spool 24a that can be slid in the front-rear direction (left-right direction in FIGS. 4 and 5) is provided in the control valve 24 in a forward direction. The spool 24a of the control valve 24 is slidable between the neutral operating position and a rising operating position on the side closer to the control valve 24 on one side and a lowering operating position on the side farther from the control valve 24 on the other side. A spring (not shown) provided inside the control valve 24 is urged to the lowering operation position.
　制御弁２４の前部にブラケット２５，２６が連結されており、操作軸５５が、ブラケット２５，２６の左右方向の軸芯Ｐ７周りに回転可能に支持されている。操作軸５５の右端部に、扇形状の操作ギヤ５５ａが連結され、操作ギヤ５５ａに軸状の操作部５５ｂ（昇降アクチュエータの操作部に相当）が連結されており、操作部５５ｂが制御弁２４のスプール２４ａの端部にまで延出されている。 Brackets 25 and 26 are connected to the front part of the control valve 24, and an operating shaft 55 is rotatably supported around a horizontal axis P7 of the brackets 25 and 26. A fan-shaped operation gear 55a is connected to the right end portion of the operation shaft 55, a shaft-shaped operation portion 55b (corresponding to the operation portion of the lifting actuator) is connected to the operation gear 55a, and the operation portion 55b is connected to the control valve 24. Is extended to the end of the spool 24a.
　昇降モータ５６（昇降アクチュエータに相当）及び減速機構５７が、ブラケット２６に連結されており、減速機構５７のピニオンギヤ５７ａが、操作軸５５の操作ギヤ５５ａに咬合している。昇降モータ５６により、減速機構５７のピニオンギヤ５７ａが正逆に回転駆動され、操作軸５５が正逆に回転操作される。 A lifting motor 56 (corresponding to a lifting actuator) and a speed reduction mechanism 57 are connected to the bracket 26, and a pinion gear 57a of the speed reduction mechanism 57 meshes with an operation gear 55a of an operation shaft 55. The pinion gear 57a of the speed reduction mechanism 57 is rotationally driven in the forward and reverse directions by the elevating motor 56, and the operation shaft 55 is rotationally operated in the forward and reverse directions.
　図５及び図７に示すように、昇降モータ５６により操作軸５５が回転操作されることによって、操作軸５５の操作部５５ｂが、制御弁２４のスプール２４ａから下降作動位置側に離れた第１位置Ａ１及び第４位置Ａ４、制御弁２４のスプール２４ａを中立停止位置に押し操作する第２位置Ａ２、制御弁２４のスプール２４ａを上昇作動位置に押し操作する第３位置Ａ３に操作される。 As shown in FIGS. 5 and 7, when the operating shaft 55 is rotated by the lifting motor 56, the operating portion 55b of the operating shaft 55 is separated from the spool 24a of the control valve 24 toward the lowering operation position side. The position A1 and the fourth position A4 are operated to a second position A2 for pushing the spool 24a of the control valve 24 to the neutral stop position, and a third position A3 for pushing the spool 24a of the control valve 24 to the raising operation position.
（苗植付装置のフロートの支持構造）
　図１，２，３に示すように、２個のフロート１２が、平面視で右及び左の後輪２の後側に位置し、側面視で植付伝動ケース９の下側に位置するように配置されている。 (Float support structure for planting equipment)
As shown in FIGS. 1, 2, and 3, two floats 12 are located on the rear side of the right and left rear wheels 2 in a plan view and below the planted transmission case 9 in a side view. It is located in.
　支持フレーム８の後部に、ブラケット２７が連結されており、フロートパイプ２８が、植付伝動ケース９の下側に左右方向に沿って配置されて、左右方向の軸芯Ｐ２周りに回転可能にブラケット２７に支持されている。フロートパイプ２８に連結された支持アーム２８ａが後側に延出されて、支持アーム２８ａの後端部の左右方向の軸芯Ｐ３周りに、フロート１２が昇降可能（揺動可能）に支持されている。 A bracket 27 is connected to the rear portion of the support frame 8, and a float pipe 28 is arranged below the planted transmission case 9 along the left-right direction so that the float pipe 28 is rotatable about an axis P2 in the left-right direction. It is supported by 27. The support arm 28a connected to the float pipe 28 is extended to the rear side, and the float 12 is supported so as to be able to move up and down (swingable) around the horizontal axis P3 of the rear end of the support arm 28a. There is.
　植付深さレバー２９が、フロートパイプ２８に連結されて、斜め前側の上側に延出されている。フィードケース１４にレバーガイド３０が連結されており、植付深さレバー２９がレバーガイド３０に挿入されている。 ∙ A planting depth lever 29 is connected to the float pipe 28 and extends diagonally forward to the upper side. A lever guide 30 is connected to the feed case 14, and a planting depth lever 29 is inserted in the lever guide 30.
　植付深さレバー２９が上下に操作されることによって、フロートパイプ２８の支持アーム２８ａが上下に操作されて、軸芯Ｐ３（フロート１２の後部）の位置が上下に変更される。植付深さレバー２９がレバーガイド３０に係合することより、軸芯Ｐ３（フロート１２の後部）の位置が固定される。 By operating the planting depth lever 29 up and down, the support arm 28a of the float pipe 28 is operated up and down, and the position of the axis P3 (rear part of the float 12) is changed up and down. By engaging the planting depth lever 29 with the lever guide 30, the position of the axis P3 (rear part of the float 12) is fixed.
　２個のフロート１２の前部に亘って、フレーム３１が連結されており、２個のフロート１２が一体で軸芯Ｐ３周りに上下に揺動する。
　支持部材３２が、フレーム３１の左右中央部に連結されて後側に延出され、レーキ状の整地部材３３が支持部材３２の後端部に連結されており、整地部材３３が機体３の左右中央に配置されている。 The frame 31 is connected to the front portions of the two floats 12, and the two floats 12 integrally swing up and down around the axis P3.
The support member 32 is connected to the left and right center portions of the frame 31 and extends rearward, and the rake-shaped leveling member 33 is connected to the rear end portion of the support member 32. It is located in the center.
（苗植付装置の昇降制御に関するフロート側の構成）
　図２及び図３に示すように、正面視でチャンネル状の検知部４０が、フレーム３１の左部に連結されたブラケット３１ａの左右方向の軸芯Ｐ４周りに、揺動可能に支持されており、支持フレーム８とカバー５４との間を通って上側に延出されている。 (Structure on the float side regarding the elevation control of the seedling planting device)
As shown in FIGS. 2 and 3, the channel-shaped detection unit 40 in a front view is swingably supported around the horizontal axis P4 of the bracket 31a connected to the left portion of the frame 31. , Extends upward between the support frame 8 and the cover 54.
　丸棒材を折り曲げて構成された接続部材４１が設けられている。支持フレーム８の上部にブラケット４２が連結されて、接続部材４１の中間部が、ブラケット４２の左右方向の軸芯Ｐ５周りに揺動可能に支持されている。 A connection member 41 formed by bending a round bar is provided. The bracket 42 is connected to the upper portion of the support frame 8 so that the intermediate portion of the connecting member 41 is swingably supported around the horizontal axis P5 of the bracket 42.
　上下方向に沿った長孔４０ａが検知部４０に開口されており、接続部材４１の一方の端部４１ａが、検知部４０の長孔４０ａに横側から挿入されている。植付深さレバー２９に長孔２９ａが開口されており、接続部材４１の他方の端部４１ｂが、植付深さレバー２９の長孔２９ａに横側から挿入されている。 A long hole 40a extending in the vertical direction is opened in the detection unit 40, and one end 41a of the connection member 41 is inserted into the long hole 40a of the detection unit 40 from the side. A long hole 29a is opened in the planting depth lever 29, and the other end 41b of the connecting member 41 is inserted into the long hole 29a of the planting depth lever 29 from the lateral side.
　ワイヤ４３（昇降連係機構に相当）のインナー４３ａの一方の端部が、接続部材４１の端部４１ａに接続され、ワイヤ４３のアウター４３ｂの一方の端部が、検知部４０の上端部に接続されている。 One end of the inner 43a of the wire 43 (corresponding to the lifting and lowering linkage mechanism) is connected to the end 41a of the connection member 41, and one end of the outer 43b of the wire 43 is connected to the upper end of the detection unit 40. Has been done.
　機体３の進行に伴ってフロート１２は田面Ｇに接地追従するのであり、田面Ｇ（フロート１２）に対して苗植付装置６が上下動すると、苗植付装置６に対してフロート１２が軸芯Ｐ３周りに上下に揺動するのであり、苗植付装置６（接続部材４１）に対して検知部４０が上下動する。検知部４０が上下動することにより、ワイヤ４３のインナー４３ａが押し引き操作される。 The float 12 follows the ground contact with the paddy field G as the machine body 3 progresses, and when the seedling planting device 6 moves up and down with respect to the paddy field G (float 12), the float 12 moves axially with respect to the seedling planting device 6. Since it swings up and down around the core P3, the detector 40 moves up and down with respect to the seedling planting device 6 (connecting member 41). The inner part 43a of the wire 43 is pushed and pulled by the vertical movement of the detection unit 40.
（苗植付装置の昇降制御に関する制御弁側の構成）
　図４，６，７，１９に示すように、操作アーム４４（昇降連係機構に相当）が、操作軸５５に相対回転可能に支持されており、操作アーム４４の操作部４４ａ（昇降連係機構の操作部に相当）が、制御弁２４のスプール２４ａの端部に対向している。 (Structure on the control valve side for raising/lowering control of the seedling planting device)
As shown in FIGS. 4, 6, 7, and 19, the operation arm 44 (corresponding to the lifting and lowering linkage mechanism) is supported by the operating shaft 55 so as to be relatively rotatable, and the operating portion 44 a of the operation arm 44 (the lifting and lowering linkage mechanism). (Corresponding to the operating portion) faces the end of the spool 24 a of the control valve 24.
　操作アーム４４の操作部４４ａと、操作軸５５の操作部５５ｂとが、正面視で制御弁２４のスプール２４ａの端部に対向して、左右方向に並ぶように配置されている（図７参照）。操作アーム４４の操作部４４ａと、操作軸５５の操作部５５ｂとが、別々に制御弁２４のスプール２４ａを下降作動位置から、中立停止位置及び上昇作動位置に押し操作することができる。 The operation portion 44a of the operation arm 44 and the operation portion 55b of the operation shaft 55 are arranged so as to face the end of the spool 24a of the control valve 24 in the left-right direction when viewed from the front (see FIG. 7). ). The operating portion 44a of the operating arm 44 and the operating portion 55b of the operating shaft 55 can separately push the spool 24a of the control valve 24 from the lowering operation position to the neutral stop position and the upper operation position.
　制御弁２４の上側の左右方向の軸芯Ｐ８周りに、感度レバー５８が揺動可能に支持されており、感度レバー５８がレバーガイド５９を通って上側に延出されている。感度レバー５８は正面視でクランク状に折り曲げられており、感度レバー５８の下部５８ａに、ワイヤ４３のアウター４３ｂの他方の端部が支持されている。ワイヤ４３のインナー４３ａの他方の端部が、操作アーム４４の上部に接続されている。 A sensitivity lever 58 is swingably supported around the axis P8 in the left-right direction on the upper side of the control valve 24, and the sensitivity lever 58 extends upward through a lever guide 59. The sensitivity lever 58 is bent in a crank shape when viewed from the front, and the lower end 58a of the sensitivity lever 58 supports the other end of the outer 43b of the wire 43. The other end of the inner 43a of the wire 43 is connected to the upper portion of the operation arm 44.
　感度レバー５８が軸芯Ｐ８周りに揺動操作されることにより、ワイヤ４３のアウター４３ｂの他方の端部の位置が、ワイヤ４３のインナー４３ａに沿って変更されるのであり、感度レバー５８がレバーガイド５９に係合することにより、ワイヤ４３のアウター４３ｂの他方の端部の位置が固定される。 By swinging the sensitivity lever 58 around the axis P8, the position of the other end of the outer 43b of the wire 43 is changed along the inner 43a of the wire 43. By engaging with the guide 59, the position of the other end of the outer 43b of the wire 43 is fixed.
（苗植付装置の昇降制御における苗植付装置の上昇操作）
　図３，４，５，１９に示す状態は、操作軸５５の操作部５５ｂが第１位置Ａ１に操作され、制御弁２４のスプール２４ａが、操作アーム４４の操作部４４ａにより中立停止位置に止められて、油圧シリンダ５が停止している状態である。この状態で、苗植付装置６が田面Ｇから設定高さＨ１に維持されて、苗植付装置６（植付アーム１１）による苗の植付深さが、設定植付深さに維持される。 (The raising operation of the seedling planting device in the lifting control of the seedling planting device)
In the state shown in FIGS. 3, 4, 5, and 19, the operating portion 55b of the operating shaft 55 is operated to the first position A1, and the spool 24a of the control valve 24 is stopped at the neutral stop position by the operating portion 44a of the operating arm 44. Thus, the hydraulic cylinder 5 is in a stopped state. In this state, the seedling planting device 6 is maintained at the set height H1 from the rice field G, and the seedling planting depth of the seedling planting device 6 (planting arm 11) is maintained at the set planting depth. It
　図３に示す状態から苗植付装置６が下降して田面Ｇに接近すると、苗植付装置６に対してフロート１２が上昇する状態となり、接続部材４１に対して検知部４０が上昇する状態となって、ワイヤ４３のインナー４３ａが苗植付装置６側に引き操作される。 When the seedling planting device 6 descends from the state shown in FIG. 3 and approaches the paddy field G, the float 12 rises with respect to the seedling planting device 6 and the detector 40 rises with respect to the connection member 41. Then, the inner 43a of the wire 43 is pulled toward the seedling planting device 6 side.
　図４，５，１９に示すように、ワイヤ４３のインナー４３ａが苗植付装置６側に引き操作されることにより、操作アーム４４が図４の反時計方向に揺動し、操作アーム４４の操作部４４ａによって、制御弁２４のスプール２４ａが上昇作動位置に押し操作されて、油圧シリンダ５が上昇作動し、苗植付装置６が上昇操作される。 As shown in FIGS. 4, 5, and 19, by pulling the inner 43a of the wire 43 toward the seedling planting device 6 side, the operation arm 44 swings counterclockwise in FIG. The spool 24a of the control valve 24 is pushed to the raising operation position by the operating portion 44a, the hydraulic cylinder 5 is raised, and the seedling planting device 6 is raised.
　苗植付装置６が上昇操作されることにより、ワイヤ４３のインナー４３ａが操作アーム４４側に押し操作されるのであり、苗植付装置６が設定高さＨ１に戻ると、検知部４０の上端部と接続部材４１の端部４１ａとの位置関係（ワイヤ４３のアウター４３ｂから出るインナー４３ａの長さ）が、図３に示す状態に戻る。 The inner 43a of the wire 43 is pushed to the operation arm 44 side by the raising operation of the seedling planting device 6, and when the seedling planting device 6 returns to the set height H1, the upper end of the detection unit 40. The positional relationship between the portion and the end 41a of the connecting member 41 (the length of the inner 43a extending from the outer 43b of the wire 43) returns to the state shown in FIG.
　制御弁２４の内部のバネにより、制御弁２４のスプール２４ａが中立停止位置に作動することが許容されるのであり、制御弁２４の内部のバネにより、制御弁２４のスプール２４ａが、操作アーム４４の操作部４４ａを押しながら中立停止位置に作動して、操作アーム４４の操作部４４ａにより中立停止位置で止められる。 The spring inside the control valve 24 allows the spool 24a of the control valve 24 to operate in the neutral stop position, and the spring inside the control valve 24 causes the spool 24a of the control valve 24 to move to the operating arm 44. The operation section 44a of the operation arm 44 is operated while being pushed to the neutral stop position while being pressed, and stopped at the neutral stop position by the operation section 44a of the operation arm 44.
　制御弁２４のスプール２４ａが中立停止位置で止められると、油圧シリンダ５の上昇作動が停止して、苗植付装置６の上昇操作が停止し、苗植付装置６が設定高さＨ１で停止して、苗植付装置６（植付アーム１１）による苗の植付深さが、設定植付深さに戻る。 When the spool 24a of the control valve 24 is stopped at the neutral stop position, the raising operation of the hydraulic cylinder 5 is stopped, the raising operation of the seedling planting device 6 is stopped, and the seedling planting device 6 is stopped at the set height H1. Then, the planting depth of the seedlings by the seedling planting device 6 (planting arm 11) is returned to the set planting depth.
（苗植付装置の昇降制御における苗植付装置の下降操作）
　図３に示す状態から苗植付装置６が上昇して田面Ｇから離れると、苗植付装置６に対してフロート１２が下降する状態となり、接続部材４１に対して検知部４０が下降する状態となって、ワイヤ４３のインナー４３ａが操作アーム４４側に押し操作される。 (Descent operation of the seedling planting device in raising/lowering control of the seedling planting device)
When the seedling planting device 6 rises from the state shown in FIG. 3 and moves away from the paddy field G, the float 12 descends to the seedling planting device 6 and the detector 40 descends to the connecting member 41. Then, the inner 43a of the wire 43 is pushed to the operation arm 44 side.
　図４，５，１９に示すように、ワイヤ４３のインナー４３ａが操作アーム４４側に押し操作されることにより、操作アーム４４の操作部４４ａにより制御弁２４のスプール２４ａが中立停止位置で止められる操作が消える。 As shown in FIGS. 4, 5 and 19, when the inner 43a of the wire 43 is pushed toward the operation arm 44, the operation portion 44a of the operation arm 44 stops the spool 24a of the control valve 24 at the neutral stop position. The operation disappears.
　制御弁２４の内部のバネにより、制御弁２４のスプール２４ａが下降作動位置に作動することが許容されるのであり、制御弁２４の内部のバネにより、制御弁２４のスプール２４ａが、操作アーム４４の操作部４４ａを押しながら下降作動位置に作動して、油圧シリンダ５が下降作動し、苗植付装置６が下降操作される。 The spring inside the control valve 24 allows the spool 24a of the control valve 24 to operate in the lowered operating position, and the spring inside the control valve 24 causes the spool 24a of the control valve 24 to move to the operating arm 44. The hydraulic cylinder 5 is moved downward while the operation part 44a of the above is pushed to the lowering operation position, and the seedling planting device 6 is operated downward.
　苗植付装置６が下降操作されることにより、ワイヤ４３のインナー４３ａが苗植付装置６側に引き操作されるのであり、苗植付装置６が設定高さＨ１に戻ると、検知部４０の上端部と接続部材４１の端部４１ａとの位置関係（ワイヤ４３のアウター４３ｂから出るインナー４３ａの長さ）が、図３に示す状態に戻る。 When the seedling planting device 6 is lowered, the inner 43a of the wire 43 is pulled to the seedling planting device 6 side, and when the seedling planting device 6 returns to the set height H1, the detection unit 40. The positional relationship between the upper end of the wire 43 and the end 41a of the connecting member 41 (the length of the inner 43a extending from the outer 43b of the wire 43) returns to the state shown in FIG.
　ワイヤ４３のインナー４３ａが苗植付装置６側に引き操作されることにより、操作アーム４４が図４の反時計方向に揺動し、操作アーム４４の操作部４４ａによって、制御弁２４のスプール２４ａが中立停止位置に押し操作されて、中立停止位置で止められる。 When the inner 43a of the wire 43 is pulled to the seedling planting device 6 side, the operation arm 44 swings counterclockwise in FIG. 4, and the spool 24a of the control valve 24 is operated by the operation portion 44a of the operation arm 44. Is pushed to the neutral stop position and stopped at the neutral stop position.
　制御弁２４のスプール２４ａが中立停止位置で止められると、油圧シリンダ５の下降作動が停止して、苗植付装置６の下降操作が停止し、苗植付装置６が設定高さＨ１で停止して、苗植付装置６（植付アーム１１）による苗の植付深さが、設定植付深さに戻る。 When the spool 24a of the control valve 24 is stopped at the neutral stop position, the lowering operation of the hydraulic cylinder 5 is stopped, the lowering operation of the seedling planting device 6 is stopped, and the seedling planting device 6 is stopped at the set height H1. Then, the planting depth of the seedlings by the seedling planting device 6 (planting arm 11) is returned to the set planting depth.
　前述の（苗植付装置の昇降制御における苗植付装置の上昇操作）、及び本項の（苗植付装置の昇降制御における苗植付装置の下降操作）に記載のように、制御弁２４とフロート１２とに亘って設けられたワイヤ４３及び操作アーム４４により、フロート１２に対する苗植付装置６の高さが制御弁２４に機械的に伝達され、制御弁２４のスプール２４ａが操作されて、苗植付装置６が田面Ｇから設定高さＨ１に維持される。 As described in the above (the raising operation of the seedling planting device in the raising/lowering control of the seedling planting device) and the (Descenting operation of the seedling planting device in the raising/lowering control of the seedling planting device) of this section, the control valve 24 The height of the seedling planting device 6 with respect to the float 12 is mechanically transmitted to the control valve 24 by the wire 43 and the operation arm 44 provided over the float 12 and the spool 24a of the control valve 24 is operated. The seedling planting device 6 is maintained at the set height H1 from the rice field G.
　この場合、操作軸５５の操作部５５ｂが第１位置Ａ１又は第４位置Ａ４に操作されていると、前述のように、ワイヤ４３及び操作アーム４４により制御弁２４のスプール２４ａが操作される状態となって、苗植付装置６が田面Ｇから設定高さＨ１に維持される。 In this case, when the operation portion 55b of the operation shaft 55 is operated to the first position A1 or the fourth position A4, the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44 as described above. Then, the seedling planting device 6 is maintained at the set height H1 from the rice field G.
（苗の設定植付深さの変更）
　図３に示す状態は、軸芯Ｐ３（フロート１２の後部）の位置が、苗植付装置６に最も接近した状態であり、設定高さＨ１（図１９参照）が、最も低い状態（苗の設定植付深さが最も深い状態）である。 (Change of planting depth of seedling)
In the state shown in FIG. 3, the position of the axis P3 (the rear part of the float 12) is closest to the seedling planting device 6, and the set height H1 (see FIG. 19) is the lowest (see the seedling). It is the deepest setting planting depth).
　図３に示す状態から植付深さレバー２９が操作されて、苗植付装置６に対する軸芯Ｐ３（フロート１２の後部）の位置が下側に変更されていくと、設定高さＨ１が高くなっていき、苗の設定植付深さが浅くなっていく。 When the planting depth lever 29 is operated from the state shown in FIG. 3 and the position of the axis P3 (rear part of the float 12) with respect to the seedling planting device 6 is changed to the lower side, the set height H1 becomes high. The planting depth of seedlings becomes shallower.
　植付深さレバー２９が操作されて苗の設定植付深さが変更されると、苗植付装置６に対するフロート１２及び検知部４０の位置が上下に変化する。植付深さレバー２９に連動して、接続部材４１が軸芯Ｐ５周りに揺動操作されるのであり、接続部材４１の端部４１ａの位置が、以下の説明のように上下に変更される。 When the planting depth lever 29 is operated and the set planting depth of seedlings is changed, the positions of the float 12 and the detection unit 40 with respect to the seedling planting device 6 are changed up and down. The connection member 41 is rocked around the axis P5 in conjunction with the planting depth lever 29, and the position of the end 41a of the connection member 41 is changed up and down as described below. ..
　植付深さレバー２９により苗の設定植付深さが深側（設定高さＨ１の低側）に変更されると（苗植付装置６に対して検知部４０の位置が上昇すると）、これに伴ってワイヤ４３のインナー４３ａ（接続部材４１の端部４１ａ）の位置も上側に変更される。 When the set planting depth of the seedling is changed to the deep side (the lower side of the set height H1) by the planting depth lever 29 (when the position of the detection unit 40 is raised with respect to the seedling planting device 6), Along with this, the position of the inner 43a of the wire 43 (the end portion 41a of the connecting member 41) is also changed to the upper side.
　植付深さレバー２９により苗の設定植付深さが浅側（設定高さＨ１の高側）に変更されると（苗植付装置６に対して検知部４０の位置が下降すると）、これに伴ってワイヤ４３のインナー４３ａ（接続部材４１の端部４１ａ）の位置も下側に変更される。 When the set planting depth of seedlings is changed to the shallow side (high side of the set height H1) by the planting depth lever 29 (when the position of the detection unit 40 is lowered with respect to the seedling planting device 6), Along with this, the position of the inner 43a of the wire 43 (the end portion 41a of the connecting member 41) is also changed to the lower side.
　以上のように、植付深さレバー２９が操作されて苗の設定植付深さが変更されても、検知部４０の上端部と接続部材４１の端部４１ａとの位置関係（ワイヤ４３のアウター４３ｂから出るインナー４３ａの長さ）が、図３に示す状態に維持される。 As described above, even if the planting depth lever 29 is operated and the set planting depth of the seedling is changed, the positional relationship between the upper end of the detection unit 40 and the end 41a of the connection member 41 (of the wire 43). The length of the inner 43a extending from the outer 43b) is maintained in the state shown in FIG.
　これにより、前述の（苗植付装置の昇降制御における苗植付装置の上昇操作）及び（苗植付装置の昇降制御における苗植付装置の下降操作）に記載のように、苗植付装置６が田面Ｇから設定高さＨ１に維持されて、苗植付装置６（植付アーム１１）による苗の植付深さが、設定植付深さに維持される。 As a result, the seedling planting device can be operated as described above (the raising operation of the seedling planting device in the elevation control of the seedling planting device) and the (descent operation of the seedling planting device in the raising and lowering control of the seedling planting device). 6 is maintained at the set height H1 from the rice field G, and the planting depth of the seedlings by the seedling planting device 6 (planting arm 11) is maintained at the set planting depth.
（苗植付装置の昇降制御の感度変更）
　前述の（苗植付装置の昇降制御における苗植付装置の上昇操作）及び（苗植付装置の昇降制御における苗植付装置の下降操作）に記載の苗植付装置６の昇降制御において、以下の説明のように、感度レバー５８により昇降制御の感度を敏感及び鈍感に設定することができる。 (Change the sensitivity of raising/lowering control of seedling planting equipment)
In the raising/lowering control of the seedling planting device 6 described in the above (the raising operation of the seedling planting device in the raising/lowering control of the seedling planting device) and the (lowering operation of the seedling planting device in the raising/lowering control of the seedling planting device), As will be described below, the sensitivity lever 58 can set the sensitivity of the elevation control to sensitive and insensitive.
　図３，４，１９に示す状態は、感度レバー５８が操作範囲の中央位置に操作されている状態である。感度レバー５８の操作位置が敏感側に変更されると、ワイヤ４３のインナー４３ａにおいて操作アーム４４側に出る長さが長くなり、ワイヤ４３のインナー４３ａにおいて苗植付装置６側に出る長さが短くなる。 The state shown in FIGS. 3, 4, and 19 is a state in which the sensitivity lever 58 is operated to the center position of the operation range. When the operation position of the sensitivity lever 58 is changed to the sensitive side, the length of the inner wire 43a of the wire 43 extending to the operation arm 44 side becomes longer, and the length of the inner wire 43a of the wire 43 extending to the seedling planting device 6 side becomes longer. It gets shorter.
　これにより、制御弁２４のスプール２４ａが中立停止位置で止められている状態でのフロート１２の姿勢が、少し下向きとなり、フロート１２の田面Ｇの接地面積が大きくなるのであり、フロート１２が田面Ｇに敏感に接地追従する状態となる。
　フロート１２が田面Ｇに敏感に接地追従することにより、制御弁２４のスプール２４ａが敏感に操作されるようになって、昇降制御の感度が敏感となる。 As a result, the posture of the float 12 in the state where the spool 24a of the control valve 24 is stopped at the neutral stop position is slightly downward, and the ground contact area of the rice paddy G of the float 12 is increased. It will be in a state of following the ground sensitively.
Since the float 12 follows the ground surface G sensitively, the spool 24a of the control valve 24 is sensitively operated, and the sensitivity of the lifting control becomes sensitive.
　感度レバー５８の操作位置が鈍感側に変更されると、ワイヤ４３のインナー４３ａにおいて操作アーム４４側に出る長さが短くなり、ワイヤ４３のインナー４３ａにおいて苗植付装置６側に出る長さが長くなる。 When the operation position of the sensitivity lever 58 is changed to the insensitive side, the length of the inner wire 43a of the wire 43 extending to the operation arm 44 side becomes shorter, and the length of the inner wire 43a of the wire 43 extending to the seedling planting device 6 side becomes shorter. become longer.
　これにより、制御弁２４のスプール２４ａが中立停止位置で止められている状態でのフロート１２の姿勢が、少し上向きとなり、フロート１２の田面Ｇの接地面積が小さくなるのであり、フロート１２が田面Ｇに鈍感に接地追従する状態となる。
　フロート１２が田面Ｇに鈍感に接地追従することにより、制御弁２４のスプール２４ａが鈍感に操作されるようになって、昇降制御の感度が鈍感となる。 As a result, the posture of the float 12 when the spool 24a of the control valve 24 is stopped at the neutral stop position is slightly upward, and the ground contact area of the pad surface G of the float 12 is reduced. It will be in a state to follow the ground touching insensitively.
The float 12 follows the touchdown surface G insensitively, so that the spool 24a of the control valve 24 is operated insensitively, and the sensitivity of the lifting control becomes insensitive.
（昇降モータと植付クラッチとに亘って設けられた第１の作業連係機構）
　図４及び図８に示すように、昇降モータ５６と植付クラッチ２１とに亘って、第１の作業連係機構６１が設けられている。第１の作業連係機構６１には、以下の説明のように、第１の連係部６３、揺動部６４及び第２の連係部６５等が設けられている。 (First work linkage mechanism provided across the lifting motor and the planting clutch)
As shown in FIGS. 4 and 8, a first work linkage mechanism 61 is provided across the lifting motor 56 and the planting clutch 21. As described below, the first work linkage mechanism 61 is provided with a first linkage part 63, a swing part 64, a second linkage part 65, and the like.
　図４，８，１０，１１に示すように、右の機体フレーム６０の右外側において、揺動部６４が、左右方向の軸芯Ｐ９周りに揺動可能に支持されている。揺動部６４は、板材が平面視でチャンネル状に折り曲げられて構成されており、揺動部６４の外側の部分の長孔６４ａが開口されている。 As shown in FIGS. 4, 8, 10, and 11, an oscillating portion 64 is oscillatably supported on the right outer side of the right machine body frame 60 about an axis P9 in the left-right direction. The oscillating portion 64 is configured by bending a plate material into a channel shape in a plan view, and has an elongated hole 64a in an outer portion of the oscillating portion 64.
　図５，６，７に示すように、操作軸５５において操作ギヤ５５ａの反対側の部分に、アーム部５５ｃが連結されている。操作軸５５のアーム部５５ｃに連係部６３が接続され、図４，８，１０，１１に示すように、連係部６３の端部である操作部６３ａが、揺動部６４の長孔６４ａに挿入されている。 As shown in FIGS. 5, 6 and 7, an arm portion 55c is connected to a portion of the operation shaft 55 opposite to the operation gear 55a. The link portion 63 is connected to the arm portion 55c of the operation shaft 55, and the operation portion 63a, which is the end portion of the link portion 63, is inserted into the elongated hole 64a of the swing portion 64, as shown in FIGS. Has been inserted.
　図８に示すように、連係部６３が上下方向に沿って配置されており、側面視で操作軸５５（軸芯Ｐ７）と揺動部６４の軸芯Ｐ９とを結ぶ仮想線に対して、揺動部６４の長孔６４ａが、後側（植付クラッチ２１の反対側）に配置されている。 As shown in FIG. 8, the link portion 63 is arranged along the vertical direction, and with respect to an imaginary line connecting the operation shaft 55 (axis core P7) and the axis P9 of the swinging part 64 in a side view, The long hole 64a of the swinging portion 64 is arranged on the rear side (the side opposite to the planting clutch 21).
　図４，５，８，１０に示すように、昇降モータ５６により操作軸５５が回転操作されることによって、操作軸５５の操作部５５ｂ及びアーム部５５ｃに連動して、連係部６３の操作部６３ａが、第１位置Ａ１及び第４位置Ａ４、第２位置Ａ２、第３位置Ａ３に操作される（前述の（苗植付装置の昇降操作用の制御弁及び昇降モータに関する構成）参照）。 As shown in FIGS. 4, 5, 8 and 10, when the operating shaft 55 is rotated by the lifting motor 56, the operating part of the linking part 63 is interlocked with the operating part 55b of the operating shaft 55 and the arm part 55c. 63a is operated to the 1st position A1 and the 4th position A4, the 2nd position A2, and the 3rd position A3 (refer to the above-mentioned (structure regarding a control valve for a raising/lowering operation of a seedling planting device, and a raising/lowering motor)).
　図４，１０，１１に示すように、連係部６３の操作部６３ａと揺動部６４の長孔６４ａとが設けられた融通部６７が、第１の連係部６３と揺動部６４との接続部分に設けられ、第１の作業連係機構６１に設けられている。 As shown in FIGS. 4, 10 and 11, the interchangeable portion 67 provided with the operating portion 63 a of the linking portion 63 and the elongated hole 64 a of the swinging portion 64 serves to connect the first linking portion 63 and the swinging portion 64. It is provided in the connecting portion and is provided in the first work linking mechanism 61.
　図８，１０，１１に示すように、長さ調節部６６が揺動部６４に取り付けられており（後述の（長さ調節部の構成）（長さ調節部の操作）参照）、ロッド状の連係部６５が、長さ調節部６６に接続されている。 As shown in FIGS. 8, 10, and 11, the length adjusting unit 66 is attached to the swinging unit 64 (see (Structure of Length Adjusting Unit) (Operation of Length Adjusting Unit) below), rod-like shape. The linking part 65 is connected to the length adjusting part 66.
　右の機体フレーム６０に、前後方向に沿った長孔６０ａが開口されており、連係部６５が、長さ調節部６６から機体フレーム６０の長孔６０ａを通って、右及び左の機体フレーム６０の間に入り込み、前側に延出されている。連係部６５が、後述の（植付クラッチを操作する操作部材）に記載のように、植付クラッチ２１に接続されている。 A long hole 60a extending in the front-rear direction is opened in the right body frame 60, and the linking portion 65 passes from the length adjusting portion 66 through the long hole 60a of the body frame 60 to the right and left body frames 60. It goes in between and extends to the front side. The linking portion 65 is connected to the planting clutch 21 as described later (operating member for operating the planting clutch).
（植付クラッチを操作する操作部材）
　図８及び図１２に示すように、ミッションケース７３の後部の内部に、植付クラッチ２１が設けられており、植付クラッチ２１が平面視で右及び左の機体フレーム６０の間に配置されている。植付クラッチ２１を伝動位置及び遮断位置に操作する操作ロッド６８が、上下方向にスライド可能にミッションケース７３に支持されている。 (Operating member for operating the planted clutch)
As shown in FIGS. 8 and 12, the planting clutch 21 is provided inside the rear portion of the mission case 73, and the planting clutch 21 is disposed between the right and left machine body frames 60 in a plan view. There is. An operation rod 68 for operating the planted clutch 21 to the transmission position and the disengagement position is supported by the mission case 73 so as to be vertically slidable.
　図１２～図１５に示すように、ミッションケース７３における操作ロッド６８の近傍部分に、上下方向及び前後方向に沿った平板状（リブ状）の一対の支持部８３が設けられており、一方側及び他方側の支持部８３の内面が、所定の間隔Ｗ１に開けられている。ピン状の支持軸８４が設けられて、支持軸８４の一方側の部分及び他方側の部分が、一方側及び他方側の支持部８３により支持されている。 As shown in FIGS. 12 to 15, a pair of flat plate-shaped (rib-shaped) support portions 83 along the up-down direction and the front-back direction are provided in the vicinity of the operation rod 68 in the mission case 73, and one side thereof is provided. The inner surface of the support portion 83 on the other side is opened at a predetermined interval W1. A pin-shaped support shaft 84 is provided, and one side portion and the other side portion of the support shaft 84 are supported by the one side and the other side support portions 83.
　板材が折り曲げられて構成された第１の操作部材６９が設けられている。操作部材６９に、一方側の操作部材部分６９ａ、他方側の操作部材部分６９ｂ、一方側及び他方側の操作部材部分６９ａ，６９ｂに亘って接続された操作部材間隔部分６９ｃ、一方側及び他方側の操作部材部分６９ａ，６９ｂから前側に延出されたアーム部６９ｄ、一方側の操作部材部分６９ａから下側に延出された操作部材揺動部分６９ｅ、操作部材揺動部分６９ｅに開口された長孔６９ｆ、操作部材間隔部分６９ｃから延出された当たり部６９ｇが設けられている。 A first operation member 69 configured by bending a plate material is provided. To the operation member 69, the operation member portion 69a on one side, the operation member portion 69b on the other side, the operation member spacing portion 69c connected across the operation member portions 69a, 69b on the one side and the other side, the one side and the other side The arm portion 69d extending forward from the operating member portions 69a and 69b, the operating member swinging portion 69e extending downward from the operating member portion 69a on one side, and the operating member swinging portion 69e are opened. An elongated portion 69f and a contact portion 69g extending from the operation member spacing portion 69c are provided.
　支持軸８４における一方側及び他方側の支持部８３の間の部分に、操作部材６９の一方側及び他方側の操作部材部分６９ａ，６９ｂが、支持軸８４の軸芯Ｐ１０周りに揺動可能に支持されており、操作部材６９のアーム部６９ｄが操作ロッド６８の下部に接続されている。 The operation member portions 69a and 69b on one side and the other side of the operation member 69 are swingable around the axis P10 of the support shaft 84 in a portion of the support shaft 84 between the one side and the other side support portions 83. It is supported and the arm portion 69d of the operation member 69 is connected to the lower portion of the operation rod 68.
　連係部６５の前側の端部６５ａが、操作部材６９の長孔６９ｆに挿入されている。これにより、昇降モータ５６と操作部材６９とに亘って、操作軸５５を介して、第１の作業連係機構６１が設けられており、昇降モータ５６と植付クラッチ２１とに亘って、操作軸５５及び操作部材６９を介して第１の作業連係機構６１が設けられている。 The front end 65a of the link portion 65 is inserted into the long hole 69f of the operation member 69. As a result, the first work linkage mechanism 61 is provided across the lifting motor 56 and the operating member 69 via the operating shaft 55, and the operating shaft extends between the lifting motor 56 and the planting clutch 21. A first work linkage mechanism 61 is provided via 55 and the operation member 69.
　操作部材６９が軸芯Ｐ１０周りに揺動操作されることにより、操作ロッド６８（植付クラッチ２１）が伝動位置及び遮断位置に操作される。操作部材６９が遮断位置に操作された際に、操作部材６９の当たり部６９ｇが他方側の支持部８３に当たり、操作部材６９の伝動位置を越えての揺動が止められる。 By operating the operating member 69 to swing about the axis P10, the operating rod 68 (planted clutch 21) is operated to the transmission position and the disengagement position. When the operating member 69 is operated to the blocking position, the contact portion 69g of the operating member 69 abuts the supporting portion 83 on the other side, and the swinging of the operating member 69 beyond the transmission position is stopped.
　操作部材６９に第１のバネ７１が接続されて、バネ７１により操作部材６９が図１２の反時計方向に付勢されており、操作ロッド６８及び操作部材６９、植付クラッチ２１が、バネ７１により遮断位置に付勢されている。 A first spring 71 is connected to the operating member 69, and the operating member 69 is biased in the counterclockwise direction in FIG. 12 by the spring 71. The operating rod 68, the operating member 69, and the planted clutch 21 are connected to the spring 71. Is urged to the cutoff position by.
　操作部材６９の操作部材間隔部分６９ｃによって、操作部材６９の一方側及び他方側の操作部材部分６９ａ，６９ｂの外面の間隔が所定の間隔Ｗ１に維持されている。これにより、操作部材６９が揺動操作される際に、操作部材６９の一方側及び他方側の操作部材部分６９ａ，６９ｂの外面が、一方側及び他方側の支持部８３の内面に接触しながら摺動する。 The operating member spacing portion 69c of the operating member 69 maintains the spacing between the outer surfaces of the operating member portions 69a and 69b on one side and the other side of the operating member 69 at a predetermined spacing W1. As a result, when the operating member 69 is rocked, the outer surfaces of the operating member portions 69a and 69b on one side and the other side of the operating member 69 come into contact with the inner surfaces of the supporting portions 83 on the one side and the other side. Slide.
　このことについて言い換えると、操作部材６９の一方側及び他方側の操作部材部分６９ａ，６９ｂの支持軸８４の軸芯に沿った方向での間隔Ｗ１が、操作部材６９の一方側の操作部材部分６９ａが一方側の支持部８３に接触し、且つ、操作部材６９の他方側の操作部材部分６９ｂが他方側の支持部８３に接触する間隔Ｗ１に維持されるように、操作部材６９の操作部材間隔部分６９ｃが設けられている。 In other words, the spacing W1 in the direction along the axis of the support shaft 84 between the operating member portions 69a, 69b on one side and the other side of the operating member 69 is such that the operating member portion 69a on one side of the operating member 69 is Is in contact with the support portion 83 on one side, and the operation member portion 69b on the other side of the operation member 69 is maintained at the interval W1 in which the support portion 83 on the other side is contacted with the operation member interval of the operation member 69. A portion 69c is provided.
（植付クラッチを操作する操作部材に隣接して設けられる連係部材）
　図１２～図１５に示すように、板材が折り曲げられて構成された連係部材７０が設けられている。 (Coupling member provided adjacent to the operating member for operating the planting clutch)
As shown in FIGS. 12 to 15, there is provided a linking member 70 formed by bending a plate material.
　連係部材７０に、一方側の連係部材部分７０ａ、他方側の連係部材部分７０ｂ、一方側及び他方側の連係部材部分７０ａ，７０ｂに亘って接続された連係部材間隔部分７０ｃ、一方側の連係部材部分７０ａから下側に延出された連係部材揺動部分７０ｅ、連係部材揺動部分７０ｅに設けられた接続部７０ｄ、連係部材揺動部分７０ｅに開口された長孔７０ｆが設けられている。 To the linking member 70, the linking member portion 70a on one side, the linking member portion 70b on the other side, the linking member spacing portion 70c connected over the linking member portions 70a and 70b on the one side and the other side, the linking member on one side A linking member swinging portion 70e extending downward from the portion 70a, a connecting portion 70d provided in the linking member swinging portion 70e, and a long hole 70f opened in the linking member swinging portion 70e are provided.
　図１３及び図１４に示すように、支持軸８４における一方側の支持部８３に対して操作部材６９の反対側の外側の部分に、連係部材７０の一方側の連係部材部分７０ａが、支持軸８４の軸芯Ｐ１０周りに揺動可能に支持されている。支持軸８４における他方側の支持部８３に対して操作部材６９の反対側の外側の部分に、連係部材７０の他方側の連係部材部分７０ｂが、支持軸８４の軸芯Ｐ１０周りに揺動可能に支持されている。 As shown in FIGS. 13 and 14, the linking member portion 70a on one side of the linking member 70 is provided on the outer side of the support shaft 84 on the opposite side of the operating member 69 with respect to the one side supporting portion 83. It is swingably supported around the axis P10 of 84. A linking member portion 70b on the other side of the linking member 70 is swingable around the axis P10 of the linking shaft 70 at a portion on the opposite side of the operating member 69 with respect to the support portion 83 on the other side of the support shaft 84. Supported by.
　連係部材７０の連係部材間隔部分７０ｃにより、連係部材７０の一方側及び他方側の連係部材部分７０ａ，７０ｂの内面の間隔が、一方側及び他方側の支持部８３の外面の所定の間隔Ｗ２に維持されている。これにより、連係部材７０が揺動操作される際に、連係部材７０の一方側及び他方側の連係部材部分７０ａ，７０ｂの内面が、一方側及び他方側の支持部８３の外面に接触しながら摺動する。 Due to the linking member spacing portion 70c of the linking member 70, the spacing between the inner surfaces of the linking member portions 70a and 70b on one side and the other side of the linking member 70 becomes a predetermined spacing W2 on the outer surface of the support portion 83 on the one side and the other side. Has been maintained. Accordingly, when the linking member 70 is rocked, the inner surfaces of the linking member portions 70a and 70b on one side and the other side of the linking member 70 come into contact with the outer surfaces of the support portions 83 on the one side and the other side. Slide.
　このことについて言い換えると、連係部材７０の一方側及び他方側の連係部材部分７０ａ，７０ｂの支持軸８４の軸芯Ｐ１０に沿った方向での間隔Ｗ２が、連係部材７０の一方側の連係部材部分７０ａが一方側の支持部８３に接触し、且つ、連係部材７０の他方側の連係部材部分７０ｂが他方側の支持部８３に接触する間隔Ｗ２に維持されるように、連係部材７０の連係部材間隔部分７０ｃが設けられている。 In other words, the distance W2 in the direction along the axis P10 of the support shaft 84 of the linking member portions 70a and 70b on one side and the other side of the linking member 70 is the linking member portion on one side of the linking member 70. The linking member of the linking member 70 is maintained so that the space 70a is in contact with the support part 83 on one side and the linking member portion 70b on the other side of the linking member 70 is in contact with the support part 83 on the other side. A spacing portion 70c is provided.
　図１３，１４，１５に示すように、操作部材６９の操作部材揺動部分６９ｅと、連係部材７０の連係部材揺動部分７０ｅとが隣接しており、連係部６５の前側の端部６５ａが、操作部材６９の長孔６９ｆと、連係部材７０の長孔７０ｆとに亘って挿入されている。 As shown in FIGS. 13, 14, and 15, the operating member swinging portion 69e of the operating member 69 and the linking member swinging portion 70e of the linking member 70 are adjacent to each other, and the front end portion 65a of the linking portion 65 is The long hole 69f of the operating member 69 and the long hole 70f of the linking member 70 are inserted.
　連係部６５の端部６５ａにおいて、操作部材６９の操作部材揺動部分６９ｅと、連係部材７０の連係部材揺動部分７０ｅとの間の部分に、スペーサ８５が取り付けられている。
これにより、操作部材６９の操作部材揺動部分６９ｅと連係部材７０の連係部材揺動部分７０ｅとの間隔が、スペーサ８５の幅である所定の間隔Ｗ３に維持されている。 At the end portion 65 a of the linking portion 65, a spacer 85 is attached to a portion between the operating member swinging portion 69 e of the operating member 69 and the linking member swinging portion 70 e of the linking member 70.
As a result, the distance between the operating member swinging portion 69e of the operating member 69 and the linking member swinging portion 70e of the linking member 70 is maintained at a predetermined distance W3 that is the width of the spacer 85.
（第１の作業連係機構と施肥クラッチとに亘って設けられた第２の作業連係機構）
　図８，１２，１３に示すように、ミッションケース７３の後部に、施肥クラッチ２２が設けられており、第１の作業連係機構６１と施肥クラッチ２２とに亘って、第２の作業連係機構６２が設けられている。第２の作業連係機構６２には、以下の説明のように、第２の操作部材７５及び第３の連係部７６等が設けられている。 (Second work linking mechanism provided across the first work linking mechanism and the fertilizer application clutch)
As shown in FIGS. 8, 12, and 13, the fertilizer application clutch 22 is provided at the rear part of the mission case 73, and the second work association mechanism 62 extends between the first work association mechanism 61 and the fertilization application clutch 22. Is provided. The second work linkage mechanism 62 is provided with a second operation member 75, a third linkage portion 76, and the like, as described below.
　施肥クラッチ２２の下部の上下方向の軸芯Ｐ１１周りに、施肥クラッチ２２を伝動位置及び遮断位置に操作する操作部材７５が、揺動可能に支持されている。連係部材７０の接続部７０ｄと操作部材７５とに亘って、ロッド状の連係部７６が接続されている。 An operating member 75 for operating the fertilizer clutch 22 to the transmission position and the shutoff position is swingably supported around the vertical axis P11 below the fertilizer clutch 22. A rod-shaped linking portion 76 is connected across the connecting portion 70d of the linking member 70 and the operating member 75.
　操作部材７５に第２のバネ７２が接続されて、バネ７２により操作部材７５が図１３の反時計方向に付勢されており、操作部材７５及び施肥クラッチ２２が、バネ７２により遮断位置に付勢されている。 The second spring 72 is connected to the operating member 75, and the operating member 75 is biased in the counterclockwise direction in FIG. 13 by the spring 72. The operating member 75 and the fertilizer clutch 22 are moved to the blocking position by the spring 72. It is energized.
　これにより、連係部材７０と第２の操作部材７５とに亘って、第２の作業連係機構６２が設けられており、第１の作業連係機構６１と施肥クラッチ２２とに亘って、連係部材７０及び第２の操作部材７５を介して、第２の作業連係機構６２が設けられている。 As a result, the second work linking mechanism 62 is provided across the linking member 70 and the second operating member 75, and the linking member 70 extends across the first work linking mechanism 61 and the fertilizer application clutch 22. A second work linking mechanism 62 is provided via the second operation member 75.
（長さ調節部の構成）
　図８，１０，１１に示すように、長さ調節部６６に、調節部８６及び連結部８７等が設けられている。 (Structure of length adjustment part)
As shown in FIGS. 8, 10, and 11, the length adjusting unit 66 is provided with an adjusting unit 86, a connecting unit 87, and the like.
　側面視で三角形状で平板状の調節部８６の端部が、揺動部６４の左右方向の軸芯Ｐ１２周りに上下に揺動可能に支持されている。揺動部６４に上下方向に沿った長孔６４ｂが開口されており、連係部６５の端部６５ｂが、揺動部６４の長孔６４ｂに挿入されて、調節部８６に接続されている。 The end of the adjustment unit 86, which is triangular and flat in a side view, is supported so as to be vertically swingable around the horizontal axis P12 of the swing unit 64. A long hole 64b extending in the up-down direction is opened in the swing portion 64, and an end portion 65b of the linking portion 65 is inserted into the long hole 64b of the swing portion 64 and connected to the adjusting portion 86.
　調節部８６に上下方向に沿った３個の連結孔８６ａ，８６ｂ，８６ｃが開口されて、揺動部６４に１個の連結孔６４ｃが開口されている。図１０に示す状態は、ボルト及びナットを備えた連結部８７が、調節部８６の連結孔８６ａ及び揺動部６４の連結孔６４ｃに挿入されて、調節部８６が揺動部６４に図１０に示す位置で連結された状態である。 The adjustment portion 86 has three connection holes 86a, 86b, 86c along the vertical direction, and the swinging portion 64 has one connection hole 64c. In the state shown in FIG. 10, the connecting portion 87 including the bolt and the nut is inserted into the connecting hole 86a of the adjusting portion 86 and the connecting hole 64c of the swinging portion 64, and the adjusting portion 86 is attached to the swinging portion 64. It is in a state of being connected at the position shown in.
　図８，１０，１１に示すように、長さ調節部６６及び揺動部６４が、平面視で右の機体フレーム６０の右外側に配置されており、側面視で後輪２に近い位置である機体３の後側に配置されている。 As shown in FIGS. 8, 10, and 11, the length adjusting portion 66 and the swinging portion 64 are arranged on the right outer side of the right machine body frame 60 in a plan view, and at a position close to the rear wheel 2 in a side view. It is arranged on the rear side of a certain aircraft 3.
　長さ調節部６６が、第２の連係部６５と揺動部６４との接続部分に設けられて、側面視で揺動部６４の軸芯Ｐ９よりも前側に配置されている。長さ調節部６６が、平面視で揺動部６４に対して外側に配置されており、連係部６５が、平面視で揺動部６４に対して右の機体フレーム６０側に配置されている。 The length adjusting portion 66 is provided at the connecting portion between the second linking portion 65 and the swinging portion 64, and is arranged in front of the axis P9 of the swinging portion 64 in a side view. The length adjusting portion 66 is arranged outside the swinging portion 64 in a plan view, and the linking portion 65 is arranged on the right body frame 60 side with respect to the swinging portion 64 in a plan view. ..
（長さ調節部の操作）
　図１０及び図１１において、連結部８７が取り外された状態で、調節部８６が上下に揺動操作されると、連係部６５に沿った方向である連係部６５の移動方向（図１０の左右方向）と交差する方向に、調節部８６が揺動操作される。調節部８６が揺動操作されるのに伴って、連係部６５の端部６５ｂも軸芯Ｐ１２周りに揺動操作されて、連係部６５の移動方向と交差する方向に揺動操作される。 (Operation of the length adjuster)
10 and 11, when the adjusting portion 86 is vertically swung with the connecting portion 87 removed, the moving direction of the linking portion 65 (the left and right in FIG. 10), which is the direction along the linking portion 65. The adjusting portion 86 is rocked in a direction intersecting the (direction). Along with the swinging operation of the adjusting portion 86, the end portion 65b of the linking portion 65 is also swung around the axis P12, and is swung in a direction intersecting the moving direction of the linking portion 65.
　図１０に示す状態から調節部８６が上側に揺動操作されると、連係部６５の端部６５ｂの位置が、連係部６５の移動方向に沿って、図１０に示す位置から、長さ調節部６６（軸芯Ｐ１２）の反対側に少し移動するのであり、次に長さ調節部６６（軸芯Ｐ１２）側に少し移動する。 When the adjusting portion 86 is rocked upward from the state shown in FIG. 10, the position of the end portion 65b of the linking portion 65 is adjusted from the position shown in FIG. 10 along the moving direction of the linking portion 65. It slightly moves to the opposite side of the portion 66 (axial center P12), and then slightly to the length adjusting part 66 (axial center P12) side.
　図１０において、連結部８７を調節部８６の連結孔８６ａに挿入して、調節部８６を揺動部６４に連結すると、連係部６５の端部６５ｂの位置が長さ調節部６６（軸芯Ｐ１２）から最も遠い側に位置して、第１の作業連係機構６１の昇降モータ５６から植付クラッチ２１に亘る長さが、最も長い状態となる。 In FIG. 10, when the connecting portion 87 is inserted into the connecting hole 86a of the adjusting portion 86 and the adjusting portion 86 is connected to the swinging portion 64, the end portion 65b of the linking portion 65 is positioned at the length adjusting portion 66 (axial core). P12) is the farthest side, and the length from the lifting motor 56 of the first work linkage mechanism 61 to the planting clutch 21 is the longest.
　連結部８７を調節部８６の連結孔８６ｂに挿入して、調節部８６を揺動部６４に連結すると、連係部６５の端部６５ｂの位置が長さ調節部６６（軸芯Ｐ１２）に少し近い側に位置して、第１の作業連係機構６１の昇降モータ５６から植付クラッチ２１に亘る長さが、前述の状態よりも少し短い状態となる。 When the connecting portion 87 is inserted into the connecting hole 86b of the adjusting portion 86 and the adjusting portion 86 is connected to the swinging portion 64, the position of the end portion 65b of the linking portion 65 is slightly aligned with the length adjusting portion 66 (axis P12). Located on the near side, the length from the elevating motor 56 of the first work linkage mechanism 61 to the planting clutch 21 is slightly shorter than the above state.
　連結部８７を調節部８６の連結孔８６ｃに挿入して、調節部８６を揺動部６４に連結すると、連係部６５の端部６５ａの位置が長さ調節部６６（軸芯Ｐ１２）に最も近い側に位置して、第１の作業連係機構６１の昇降モータ５６から植付クラッチ２１に亘る長さが、最も短い状態となる。 When the connecting portion 87 is inserted into the connecting hole 86c of the adjusting portion 86 and the adjusting portion 86 is connected to the swinging portion 64, the position of the end portion 65a of the linking portion 65 is set to the length adjusting portion 66 (axis P12) most. At the near side, the length from the lifting motor 56 of the first work linkage mechanism 61 to the planting clutch 21 is the shortest.
　以上のように、調節部８６を上下に揺動操作し、連結部８７を、調節部８６の連結孔８６ａ，８６ｂ，８６ｃ及び揺動部６４の連結孔６４ｃに挿入して、調節部８６を揺動部６４に連結することにより、連係部６５の端部６５ｂにおける揺動部６４の接続位置が、連係部６５の移動方向に沿って３段階に変更される。 As described above, the adjusting portion 86 is vertically swung to insert the connecting portion 87 into the connecting holes 86a, 86b, 86c of the adjusting portion 86 and the connecting hole 64c of the swinging portion 64, and the adjusting portion 86 is moved. By connecting to the rocking|swiveling part 64, the connection position of the rocking|swiveling part 64 in the edge part 65b of the linking part 65 is changed in three steps along the moving direction of the linking part 65.
　これにより、連係部６５の端部６５ｂの位置が、連係部６５の移動方向に沿って前後に少し変更されるのであり、第１の作業連係機構６１の昇降モータ５６から植付クラッチ２１に亘る長さが調節される。 As a result, the position of the end portion 65b of the linkage portion 65 is slightly changed back and forth along the moving direction of the linkage portion 65, and extends from the lifting motor 56 of the first work linkage mechanism 61 to the planting clutch 21. The length is adjusted.
（昇降モータによる植付クラッチ及び施肥クラッチの遮断位置への操作）
　図８及び図１０に示すように、昇降モータ５６により操作軸５５のアーム部５５ｃが、第１位置Ａ１に操作されていると、連係部６３の操作部６３ａが、第１位置Ａ１に位置している。 (Operation of the planting clutch and fertilizing clutch to the disengaged position by the lifting motor)
As shown in FIG. 8 and FIG. 10, when the arm portion 55c of the operation shaft 55 is operated to the first position A1 by the lifting motor 56, the operation portion 63a of the linkage portion 63 is located at the first position A1. ing.
　連係部６３の操作部６３ａが第１位置Ａ１に位置していると、バネ７１により操作部材６９が図１２の反時計方向に操作されて、植付クラッチ２１が遮断位置に操作され、バネ７２により操作部材７５が図１３の反時計方向に操作されて、施肥クラッチ２２が遮断位置に操作されている。図１２及び図１３に示す状態で、連係部６５の端部６５ａが、操作部材６９の長孔６９ｆの前後中間部に位置し、連係部材７０の長孔７０ｆの後部に位置している。 When the operating portion 63a of the linking portion 63 is located at the first position A1, the operating member 69 is operated by the spring 71 in the counterclockwise direction in FIG. 12, the planting clutch 21 is operated to the disengagement position, and the spring 72 is operated. Thus, the operating member 75 is operated in the counterclockwise direction in FIG. 13, and the fertilizer application clutch 22 is operated to the disengagement position. In the state shown in FIGS. 12 and 13, the end portion 65a of the linking portion 65 is located at the front-rear intermediate portion of the elongated hole 69f of the operating member 69, and is located behind the elongated hole 70f of the linking member 70.
　図８及び図１０に示すように、昇降モータ５６により操作軸５５のアーム部５５ｃが、第２位置Ａ２及び第３位置Ａ３に操作されても、連係部６３の操作部６３ａが、揺動部６４の長孔６４ａ（融通部６７）に沿って第２位置Ａ２及び第３位置Ａ３移動するだけで、揺動部６４は操作されず、植付クラッチ２１及び施肥クラッチ２２は遮断位置に維持される。 As shown in FIGS. 8 and 10, even when the lifting motor 56 operates the arm portion 55c of the operation shaft 55 to the second position A2 and the third position A3, the operation portion 63a of the linkage portion 63 does not swing. The oscillating portion 64 is not operated and the planting clutch 21 and the fertilizing clutch 22 are maintained in the disengaged position only by moving the second position A2 and the third position A3 along the long hole 64a (interchangeable portion 67) of 64. It
　以上のように、昇降モータ５６により操作軸５５のアーム部５５ｃが、第１位置Ａ１、第２位置Ａ２及び第３位置Ａ３に操作された状態が、第１及び第２の作業連係機構６１，６２、第１及び第２のバネ７１，７２を介して、植付クラッチ２１及び施肥クラッチ２２が遮断位置に操作された状態である。 As described above, when the arm 55c of the operating shaft 55 is operated by the lifting motor 56 to the first position A1, the second position A2, and the third position A3, the first and second work linking mechanisms 61, The planting clutch 21 and the fertilizer application clutch 22 are operated to the disengaged position via 62, the first and second springs 71 and 72.
　昇降モータ５６におけるワイヤ４３及び操作アーム４４に優先して制御弁２４のスプール２４ａを上昇作動位置に操作する作動、及び、昇降モータ５６におけるワイヤ４３及び操作アーム４４により制御弁２４のスプール２４ａが操作される状態に維持する作動が、融通部６７により植付クラッチ２１及び施肥クラッチ２２（操作部材６９）に伝達されない。 The operation of operating the spool 24a of the control valve 24 to the raising operation position in preference to the wire 43 and the operation arm 44 of the lift motor 56, and the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44 of the lift motor 56. The operation of maintaining the state maintained is not transmitted to the planting clutch 21 and the fertilizer application clutch 22 (operation member 69) by the interchange part 67.
（昇降モータによる植付クラッチ及び施肥クラッチの伝動位置への操作）
　図８から図９に示すように、昇降モータ５６により操作軸５５のアーム部５５ｃが第４位置Ａ４に操作されると、連係部６３の操作部６３ａが、揺動部６４の長孔６４ａの上端部に達して第４位置Ａ４（図１０参照）に移動するのであり、揺動部６４が図９の反時計方向に揺動操作されて、連係部６５が後側に引き操作される。 (Operation of the planting clutch and fertilizer application clutch to the transmission position by the lifting motor)
As shown in FIGS. 8 to 9, when the arm portion 55c of the operating shaft 55 is operated to the fourth position A4 by the lifting motor 56, the operating portion 63a of the linking portion 63 moves into the long hole 64a of the swinging portion 64. Since it reaches the upper end portion and moves to the fourth position A4 (see FIG. 10 ), the swinging portion 64 is swung counterclockwise in FIG. 9, and the link portion 65 is pulled rearward.
　図１２及び図１３に示す状態から、連係部６５が後側に引き操作されると、連係部６５の端部６５ａが連係部材７０の長孔７０ｆの後部に位置していることにより、連係部材７０が図１２の反時計方向に揺動操作され、連係部７６が後側に引き操作されて、操作部材７５がバネ７２に抗して遮断位置から伝動位置側に操作され始める。 When the linking portion 65 is pulled rearward from the state shown in FIGS. 12 and 13, the end portion 65a of the linking portion 65 is located at the rear portion of the elongated hole 70f of the linking member 70. The swinging operation of 70 is performed in the counterclockwise direction in FIG. 12, the linking portion 76 is pulled rearward, and the operating member 75 starts to be operated from the blocking position to the transmission position side against the spring 72.
　この場合、連係部６５の端部６５ａが、操作部材６９の長孔６９ｆの前後中間部に位置していたことにより、連係部６５の端部６５ａが、操作部材６９の長孔６９ｆに沿って後側に移動するだけで、操作部材６９は操作されず、植付クラッチ２１は遮断位置に維持される。 In this case, since the end portion 65a of the linking portion 65 is located at the front-rear intermediate portion of the elongated hole 69f of the operating member 69, the end portion 65a of the linking portion 65 extends along the elongated hole 69f of the operating member 69. Only by moving to the rear side, the operating member 69 is not operated and the planted clutch 21 is maintained in the disengaged position.
　連係部６５の端部６５ａが操作部材６９の長孔６９ｆの後端部に達すると、連係部６５が後側に引き操作されるのに伴って、操作部材６９がバネ７１に抗して遮断位置から伝動位置側に揺動操作され始める。連係部６５が後側に引き操作されることにより、施肥クラッチ２２が伝動位置に操作され、これに少し遅れて植付クラッチ２１が伝動位置に操作される。 When the end portion 65a of the linking portion 65 reaches the rear end portion of the elongated hole 69f of the operating member 69, the operating member 69 is cut off against the spring 71 as the linking portion 65 is pulled rearward. Starting to swing from the position to the transmission position. When the linking portion 65 is pulled rearward, the fertilizer application clutch 22 is operated to the transmission position, and the planting clutch 21 is operated to the transmission position with a slight delay.
　以上のように、植付クラッチ２１が伝動位置に操作されるのに伴って、連係部材７０、第２の作業連係機構６２及び第２の操作部材７５により、施肥クラッチ２２が伝動位置に操作される。
　昇降モータ５６における植付クラッチ２１及び施肥クラッチ２２を伝動位置に操作する作動が、融通部６７により植付クラッチ２１及び施肥クラッチ２２に伝達される。 As described above, as the planting clutch 21 is operated to the transmission position, the fertilizer application clutch 22 is operated to the transmission position by the linkage member 70, the second work linkage mechanism 62, and the second operation member 75. It
The operation of operating the planting clutch 21 and the fertilizer application clutch 22 in the elevation motor 56 to the transmission position is transmitted to the planting clutch 21 and the fertilizer application clutch 22 by the interchange part 67.
　図１に示すように、施肥装置７において、繰り出し部１６と作溝器１８（田面Ｇ）とが少し離れているので、施肥クラッチ２２が伝動位置に操作されて、繰り出し部１６から最初の肥料が繰り出された場合、最初の肥料が作溝器１８（田面Ｇ）に到達するまでに少し時間を要する。 As shown in FIG. 1, in the fertilizer application device 7, since the feeding section 16 and the grooving device 18 (field G) are slightly apart from each other, the fertilization clutch 22 is operated to the transmission position, and the first fertilizer from the feeding section 16 is operated. When it is fed, it takes a little time for the first fertilizer to reach the grooving device 18 (Tamen G).
　植付クラッチ２１が伝動位置に操作されるよりも少し前に、施肥クラッチ２２が伝動位置に操作されることによって、最初の肥料が作溝器１８（田面Ｇ）に到達するのと略同時に、植付アーム１１による苗の植え付けが開始されるようにすることができる。 Shortly before the planting clutch 21 is operated to the transmission position, the fertilizer application clutch 22 is operated to the transmission position, so that the first fertilizer reaches the grooving device 18 (field G) at substantially the same time. The planting of the seedling by the planting arm 11 can be started.
　以上のように、昇降モータ５６により操作軸５５のアーム部５５ｃが、第４位置Ａ４に操作された状態が、第１及び第２の作業連係機構６１，６２により、第１及び第２のバネ７１，７２に抗して、植付クラッチ２１及び施肥クラッチ２２が伝動位置に操作された状態である。 As described above, when the arm 55c of the operation shaft 55 is operated to the fourth position A4 by the lifting motor 56, the first and second springs are operated by the first and second work linkage mechanisms 61 and 62. The planting clutch 21 and the fertilizer application clutch 22 are in the state of being operated to the transmission position against 71 and 72.
　昇降モータ５６により操作軸５５のアーム部５５ｃが第４位置Ａ４に操作されることにより、昇降モータ５６における植付クラッチ２１を伝動位置に操作する作動が、第１の作業連係機構６１から第２の作業連係機構６２を介して、施肥クラッチ２２に伝達されて、施肥クラッチ２２が第２のバネ７２に抗して伝動位置に操作される。 By operating the arm portion 55c of the operation shaft 55 by the lifting motor 56 to the fourth position A4, the operation of operating the planting clutch 21 in the lifting motor 56 to the transmission position is performed from the first work linkage mechanism 61 to the second position. The fertilizer application clutch 22 is transmitted to the fertilizer application clutch 22 via the work linkage mechanism 62, and the fertilizer application clutch 22 is operated to the transmission position against the second spring 72.
　図９から図８に示すように、昇降モータ５６により操作軸５５のアーム部５５ｃが第１位置Ａ１（第２位置Ａ２）（第３位置Ａ３）に操作されると、揺動部６４による連係部６５の引き操作が解消されるので、前述の（昇降モータによる植付クラッチ及び施肥クラッチの遮断位置への操作）に記載のように、バネ７１，７２により、植付クラッチ２１及び施肥クラッチ２２が略同時に遮断位置に操作される。 As shown in FIGS. 9 to 8, when the lifting motor 56 operates the arm portion 55c of the operation shaft 55 to the first position A1 (second position A2) (third position A3), the oscillating portion 64 causes the linkage. Since the pulling operation of the portion 65 is eliminated, as described in the above (operation of the raising/lowering motor to the disengagement position of the planting clutch and the fertilizing clutch), the springs 71 and 72 are used to plant the planting clutch 21 and the fertilizing clutch 22. Are operated to the blocking position at substantially the same time.
　以上のように、植付クラッチ２１が遮断位置に操作されるのに伴って、連係部材７０、第２の作業連係機構６２及び第２の操作部材７５を介して、施肥クラッチ２２が遮断位置に操作される。 As described above, as the planting clutch 21 is operated to the disengaged position, the fertilizer application clutch 22 is moved to the disengaged position via the linkage member 70, the second work linkage mechanism 62, and the second operation member 75. Operated.
（操作レバーによる苗植付装置の昇降操作の為の構成）
　図１及び図１９に示すように、機体３の前部に、前輪１を操向操作する操縦ハンドル７７が設けられ、操縦ハンドル７７の右の下側部に、操作レバー７８（操作具に相当）が設けられて右横側に延出されている。 (Structure for raising and lowering the seedling planting device with the operating lever)
As shown in FIGS. 1 and 19, a steering handle 77 for steering the front wheels 1 is provided in the front portion of the machine body 3, and an operating lever 78 (corresponding to an operating tool is provided on the lower right side of the steering handle 77. ) Is provided and extends to the right side.
　操作レバー７８は、中立位置Ｎ、第１上昇位置Ｕ１、第２上昇位置Ｕ２（上昇位置に相当）、第１下降位置Ｄ１、第２下降位置Ｄ２（下降位置に相当）、後側の右マーカー位置Ｒ１、前側の左マーカー位置Ｌ１に人為的に操作可能である。作業者が操作レバー７８から手を離すと、操作レバー７８が自動的に中立位置Ｎに戻るように、操作レバー７８は中立位置Ｎに付勢されている。 The operation lever 78 includes a neutral position N, a first lifted position U1, a second lifted position U2 (corresponding to a lifted position), a first lowered position D1, a second lowered position D2 (corresponding to a lowered position), and a rear right marker. It is possible to artificially operate at the position R1 and the front left marker position L1. The operating lever 78 is biased to the neutral position N so that when the operator releases the operating lever 78, the operating lever 78 automatically returns to the neutral position N.
　制御装置１００が機体３に設けられ、操作レバー７８の操作位置を検出する位置センサー（図示せず）が設けられて、操作レバー７８の操作位置が制御装置１００に入力されている。機体３に対するリンク機構４の上下角度を検出する角度センサー７９（上限位置検出部に相当）（下限位置検出部に相当）が設けられており、角度センサー７９の検出値が制御装置１００に入力されている。 The control device 100 is provided on the machine body 3, a position sensor (not shown) for detecting the operation position of the operation lever 78 is provided, and the operation position of the operation lever 78 is input to the control device 100. An angle sensor 79 (corresponding to the upper limit position detecting unit) (corresponding to the lower limit position detecting unit) that detects the vertical angle of the link mechanism 4 with respect to the machine body 3 is provided, and the detection value of the angle sensor 79 is input to the control device 100. ing.
　図６，７，１９に示すように、操作軸５５のアーム部５５ｃ側の端部に、操作軸５５の回転角度を検出する位置センサー８０が接続されており、位置センサー８０の検出値が制御装置１００に入力されている。位置センサー８０により操作軸５５の回転角度が検出されることによって、操作軸５５の操作部５５ｂ及びアーム部５５ｃの位置が検出される。 As shown in FIGS. 6, 7, and 19, a position sensor 80 that detects the rotation angle of the operation shaft 55 is connected to the end of the operation shaft 55 on the side of the arm portion 55c, and the detected value of the position sensor 80 is controlled. It is input to the device 100. The position sensor 80 detects the rotation angle of the operation shaft 55, whereby the positions of the operation portion 55b and the arm portion 55c of the operation shaft 55 are detected.
　昇降制御部１０１が、制御装置１００にソフトウェアとして設けられており、操作レバー７８の操作位置（中立位置Ｎ、第１上昇位置Ｕ１、第２上昇位置Ｕ２、第１下降位置Ｄ１、第２下降位置Ｄ２）、及び角度センサー７９の検出値に基づいて、昇降制御部１０１（制御装置１００）により、昇降モータ５６が以下の説明のように操作される。 The elevating control unit 101 is provided as software in the control device 100, and operates positions of the operation lever 78 (neutral position N, first raised position U1, second raised position U2, first lowered position D1, second lowered position). Based on the detected value of D2) and the angle sensor 79, the lift control unit 101 (control device 100) operates the lift motor 56 as described below.
（操作レバーの第１上昇位置による苗植付装置の上昇操作）
　昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが第４位置Ａ４に操作されて、昇降モータ５６により植付クラッチ２１及び施肥クラッチ２２が、伝動位置に操作され、図１９に示すように、ワイヤ４３及び操作アーム４４により制御弁２４のスプール２４ａが操作される状態を想定する。 (The raising operation of the seedling planting device by the first raising position of the operation lever)
The raising/lowering motor 56 operates the operating portion 55b and the arm portion 55c of the operation shaft 55 to the fourth position A4, and the raising/lowering motor 56 operates the planting clutch 21 and the fertilizer clutch 22 to the transmission position, as shown in FIG. First, assume that the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44.
　前述の状態において、図１９及び図２２に示すように、操作レバー７８が第１上昇位置Ｕ１に操作されると（ステップＳ１）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第３位置Ａ３に操作される（ステップＳ２）。 In the above-mentioned state, as shown in FIGS. 19 and 22, when the operation lever 78 is operated to the first raised position U1 (step S1), the operation section 55b of the operation shaft 55 and the arm section 55c are moved by the elevating motor 56. , To the third position A3 (step S2).
　これにより、植付クラッチ２１及び施肥クラッチ２２が遮断位置に操作され（前述の（昇降モータによる植付クラッチ及び施肥クラッチの遮断位置への操作）参照）、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが上昇作動位置に押し操作されて、油圧シリンダ５が上昇作動し、苗植付装置６が上昇操作される。 As a result, the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position (see (Operation of the planting clutch and fertilizer application clutch to disengagement position by the lifting motor) described above), and the wire 43 and the operation arm 44 are given priority. The spool 24a of the control valve 24 is pushed to the raising operation position, the hydraulic cylinder 5 is raised, and the seedling planting device 6 is raised.
　操作レバー７８が第１上昇位置Ｕ１から中立位置Ｎに操作されると（ステップＳ１，Ｓ６）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第２位置Ａ２に操作される（ステップＳ７）。 When the operating lever 78 is operated from the first raised position U1 to the neutral position N (steps S1 and S6), the operating unit 55b and the arm 55c of the operating shaft 55 are operated to the second position A2 by the elevating motor 56. (Step S7).
　これにより、植付クラッチ２１及び施肥クラッチ２２が遮断位置に操作された状態で、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが中立停止位置に戻し操作されて、油圧シリンダ５及び苗植付装置６が停止する。 As a result, in the state where the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position, the spool 24a of the control valve 24 is operated to return to the neutral stop position in preference to the wire 43 and the operation arm 44, and the hydraulic cylinder is operated. 5 and the seedling planting device 6 are stopped.
　操作レバー７８が第１上昇位置Ｕ１に操作された状態（苗植付装置６が上昇操作されている状態）において、角度センサー７９によりリンク機構４が上限位置に達したことが検出されると（ステップＳ４）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第２位置Ａ２に操作される（ステップＳ７）。 When the angle sensor 79 detects that the link mechanism 4 has reached the upper limit position in the state where the operation lever 78 is operated to the first elevated position U1 (the state where the seedling planting device 6 is operated to be elevated) ( (Step S4), the operating portion 55b and the arm portion 55c of the operating shaft 55 are operated to the second position A2 by the lifting motor 56 (step S7).
　これにより、操作レバー７８が第１上昇位置Ｕ１に操作された状態でも、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが中立停止位置に戻し操作されて、油圧シリンダ５及び苗植付装置６が上限位置で停止する。 As a result, even when the operating lever 78 is operated to the first raised position U1, the spool 24a of the control valve 24 is operated to return to the neutral stop position in preference to the wire 43 and the operating arm 44, and the hydraulic cylinder 5 and The seedling planting device 6 stops at the upper limit position.
（操作レバーの第２上昇位置による苗植付装置の上昇操作）
　図１９及び図２２に示すように、操作レバー７８が第２上昇位置Ｕ２に操作されると（ステップＳ１）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが第３位置Ａ３に操作される（ステップＳ３）。 (The raising operation of the seedling planting device by the second raising position of the operation lever)
As shown in FIGS. 19 and 22, when the operating lever 78 is operated to the second raised position U2 (step S1), the operating portion 55b of the operating shaft 55 and the arm portion 55c are moved to the third position A3 by the lifting motor 56. It is operated (step S3).
　これにより、植付クラッチ２１及び施肥クラッチ２２が遮断位置に操作され（前述の（昇降モータによる植付クラッチ及び施肥クラッチの遮断位置への操作）参照）、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが上昇作動位置に押し操作されて、油圧シリンダ５が上昇作動し、苗植付装置６が上昇操作される。 As a result, the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position (see (Operation of the planting clutch and fertilizer application clutch to disengagement position by the lifting motor) described above), and the wire 43 and the operation arm 44 are given priority. The spool 24a of the control valve 24 is pushed to the raising operation position, the hydraulic cylinder 5 is raised, and the seedling planting device 6 is raised.
　操作レバー７８が第２上昇位置Ｕ２から中立位置Ｎに操作されても（ステップＳ１）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第３位置Ａ３に維持され（ステップＳ３）、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが上昇作動位置に押し操作される状態が維持されて、油圧シリンダ５の上昇作動及び苗植付装置６の上昇操作は続行される。 Even if the operating lever 78 is operated from the second raised position U2 to the neutral position N (step S1), the operating portion 55b and the arm portion 55c of the operating shaft 55 are maintained at the third position A3 by the lifting motor 56 (step S3). ), the spool 24a of the control valve 24 is maintained in a state of being pushed to the raising operation position in preference to the wire 43 and the operating arm 44, and the raising operation of the hydraulic cylinder 5 and the raising operation of the seedling planting device 6 are performed. Continued.
　前述のように、油圧シリンダ５の上昇作動及び苗植付装置６の上昇操作が続行された状態において、角度センサー７９によりリンク機構４が上限位置に達したことが検出されると（ステップＳ５）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第２位置Ａ２に操作される（ステップＳ７）。 As described above, when the angle sensor 79 detects that the link mechanism 4 has reached the upper limit position in the state where the raising operation of the hydraulic cylinder 5 and the raising operation of the seedling planting device 6 are continued (step S5). The operating portion 55b and the arm portion 55c of the operating shaft 55 are operated to the second position A2 by the lifting motor 56 (step S7).
　これにより、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが中立停止位置に戻し操作されて、油圧シリンダ５及び苗植付装置６が上限位置で停止する。 As a result, the spool 24a of the control valve 24 is returned to the neutral stop position prior to the wire 43 and the operation arm 44, and the hydraulic cylinder 5 and the seedling planting device 6 stop at the upper limit position.
（操作レバーの第１下降位置による苗植付装置の下降操作）
　苗植付装置６（フロート１２）が田面Ｇから上側に離れた位置で、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第２位置Ａ２に操作されて苗植付装置６が停止し、昇降モータ５６により植付クラッチ２１及び施肥クラッチ２２が、遮断位置に操作された状態を想定する。 (Descent operation of the seedling planting device by the first lowered position of the operation lever)
At the position where the seedling planting device 6 (float 12) is away from the rice field G to the upper side, the operating portion 55b and the arm portion 55c of the operating shaft 55 are operated to the second position A2 by the lifting motor 56, and the seedling planting device 6 It is assumed that the planting clutch 21 and the fertilizer application clutch 22 are operated to the cutoff position by the lifting motor 56.
　フロート１２が田面Ｇから上側に離れていると、苗植付装置６に対してフロート１２が下降する状態となり、接続部材４１に対して検知部４０が下降する状態となって、ワイヤ４３のインナー４３ａが操作アーム４４側に押し操作されている。 When the float 12 is separated from the rice field G to the upper side, the float 12 is lowered with respect to the seedling planting device 6, and the detection unit 40 is lowered with respect to the connection member 41, so that the inner portion of the wire 43 is lowered. 43a is pushed to the operation arm 44 side.
　前述の状態において、図１９，２２，２３に示すように、操作レバー７８が第１下降位置Ｄ１に操作されると（ステップＳ１）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第１位置Ａ１に操作される（ステップＳ１１）。 In the aforementioned state, as shown in FIGS. 19, 22, and 23, when the operating lever 78 is operated to the first lowered position D1 (step S1), the lifting motor 56 causes the operating portion 55b of the operating shaft 55 and the arm portion 55c. Is operated to the first position A1 (step S11).
　操作軸５５の操作部５５ｂにより制御弁２４のスプール２４ａが中立停止位置で止められる操作が消えるので、制御弁２４の内部のバネにより、制御弁２４のスプール２４ａが下降作動位置に作動することが許容される。 Since the operation of stopping the spool 24a of the control valve 24 at the neutral stop position by the operating portion 55b of the operation shaft 55 disappears, the spool inside the control valve 24 may cause the spool 24a of the control valve 24 to move to the lowering operation position. Permissible.
　これにより、ワイヤ４３及び操作アーム４４により制御弁２４のスプール２４ａが操作される状態となって、制御弁２４の内部のバネにより、制御弁２４のスプール２４ａが、操作アーム４４の操作部４４ａを押しながら下降作動位置に作動して、油圧シリンダ５が下降作動し、苗植付装置６が下降操作される（前述の（苗植付装置の昇降制御における苗植付装置の下降操作）参照）。植付クラッチ２１及び施肥クラッチ２２は、遮断位置に操作（維持）されている。 As a result, the spool 43a of the control valve 24 is operated by the wire 43 and the operation arm 44, and the spring inside the control valve 24 causes the spool 24a of the control valve 24 to operate the operation portion 44a of the operation arm 44. While pushing, the hydraulic cylinder 5 is moved to the descending operation position, the hydraulic cylinder 5 is descended, and the seedling planting device 6 is descended (see the above-mentioned (the descending operation of the seedling planting device in the elevation control of the seedling planting device)). .. The planting clutch 21 and the fertilizer application clutch 22 are operated (maintained) at the cutoff position.
　操作レバー７８が第１下降位置Ｄ１から中立位置Ｎに操作されると（ステップＳ１，Ｓ１３）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第２位置Ａ２に操作される（ステップＳ１４）。 When the operating lever 78 is operated from the first lowered position D1 to the neutral position N (steps S1 and S13), the operating portion 55b and the arm portion 55c of the operating shaft 55 are operated to the second position A2 by the lifting motor 56. (Step S14).
　これにより、植付クラッチ２１及び施肥クラッチ２２が遮断位置に操作された状態で、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが中立停止位置に戻し操作されて、油圧シリンダ５及び苗植付装置６が停止する。 As a result, in the state where the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position, the spool 24a of the control valve 24 is operated to return to the neutral stop position in preference to the wire 43 and the operation arm 44, and the hydraulic cylinder is operated. 5 and the seedling planting device 6 are stopped.
　例えば路上等において、操作レバー７８が第１下降位置Ｄ１に操作された場合、リンク機構４が下限位置に達することがある。
　操作レバー７８が第１下降位置Ｄ１に操作された状態（苗植付装置６が下降操作されている状態）において、角度センサー７９によりリンク機構４が下限位置に達したことが検出されると（ステップＳ１２）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第２位置Ａ２に操作される（ステップＳ１４）。 For example, on the road or the like, when the operation lever 78 is operated to the first lowered position D1, the link mechanism 4 may reach the lower limit position.
When the angle sensor 79 detects that the link mechanism 4 has reached the lower limit position in a state where the operation lever 78 is operated to the first lowered position D1 (a state where the seedling planting device 6 is moved downward) ( (Step S12), the operating portion 55b and the arm portion 55c of the operating shaft 55 are operated to the second position A2 by the lifting motor 56 (step S14).
　これにより、操作レバー７８が第１下降位置Ｄ１に操作された状態でも、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが中立停止位置に戻し操作されて、油圧シリンダ５及び苗植付装置６が下限位置で停止する。 As a result, even when the operation lever 78 is operated to the first lowered position D1, the spool 24a of the control valve 24 is operated to return to the neutral stop position in preference to the wire 43 and the operation arm 44, and the hydraulic cylinder 5 and The seedling planting device 6 stops at the lower limit position.
（操作レバーの第２下降位置による苗植付装置の下降操作）
　図１９，２２，２４に示すように、操作レバー７８が第２下降位置Ｄ２に操作されると（ステップＳ１）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第１位置Ａ１に操作される（ステップＳ２１，Ｓ２２）。 (Down operation of the seedling planting device by the second lower position of the operation lever)
As shown in FIGS. 19, 22, and 24, when the operating lever 78 is operated to the second lowered position D2 (step S1), the operating portion 55b of the operating shaft 55 and the arm portion 55c are moved to the first position by the lifting motor 56. It is operated by A1 (steps S21 and S22).
　前述の（操作レバーの第１下降位置による苗植付装置の下降操作）に記載のように、ワイヤ４３及び操作アーム４４により制御弁２４のスプール２４ａが操作される状態となって、制御弁２４のスプール２４ａが下降作動位置に作動して、油圧シリンダ５が下降作動し、苗植付装置６が下降操作される。植付クラッチ２１及び施肥クラッチ２２は、遮断位置に操作（維持）されている。 As described above (downward operation of the seedling planting device by the first lowered position of the operation lever), the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44, and the control valve 24 is operated. The spool 24a is moved to the lowering operation position, the hydraulic cylinder 5 is lowered, and the seedling planting device 6 is lowered. The planting clutch 21 and the fertilizer application clutch 22 are operated (maintained) at the cutoff position.
　操作レバー７８が第２下降位置Ｄ２から中立位置Ｎに操作されても（ステップＳ２２～Ｓ２５）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第１位置Ａ１に維持され（ステップＳ２２）、ワイヤ４３及び操作アーム４４により制御弁２４のスプール２４ａが操作される状態が維持されて、油圧シリンダ５の下降作動及び苗植付装置６の下降操作は続行される。 Even if the operating lever 78 is operated from the second lowered position D2 to the neutral position N (steps S22 to S25), the operating portion 55b and the arm portion 55c of the operating shaft 55 are maintained at the first position A1 by the lifting motor 56 ( In step S22), the state in which the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44 is maintained, and the lowering operation of the hydraulic cylinder 5 and the lowering operation of the seedling planting device 6 are continued.
　フロート１２が田面Ｇに接地すると、ワイヤ４３及び操作アーム４４により制御弁２４のスプール２４ａが操作される状態によって、苗植付装置６が設定高さＨ１に維持される状態となり、苗植付装置６（植付アーム１１）による苗の植付深さが設定植付深さに維持される状態となる（前述の（苗植付装置の昇降制御における苗植付装置の上昇操作）及び（苗植付装置の昇降制御における苗植付装置の下降操作）参照）。 When the float 12 is grounded to the rice field G, the seedling planting device 6 is maintained at the set height H1 due to the state in which the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44. 6 (planting arm 11) is in a state where the planting depth of the seedling is maintained at the set planting depth (the above-mentioned (the raising operation of the seedling planting device in the elevation control of the seedling planting device) and the (seedling plant)). See the descending operation of the seedling planting device in the lifting control of the planting plant)).
　例えば路上等において、操作レバー７８が第２下降位置Ｄ２に操作された場合、リンク機構４が下限位置に達することがある。角度センサー７９によりリンク機構４が下限位置に達したことが検出されると（ステップＳ２５）、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃが、第２位置Ａ２に操作される（ステップＳ２６）。 For example, on the road or the like, when the operation lever 78 is operated to the second lowered position D2, the link mechanism 4 may reach the lower limit position. When the angle sensor 79 detects that the link mechanism 4 has reached the lower limit position (step S25), the lifting motor 56 operates the operating portion 55b and the arm portion 55c of the operating shaft 55 to the second position A2 ( Step S26).
　これにより、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが中立停止位置に戻し操作されて、油圧シリンダ５及び苗植付装置６が下限位置で停止する。 As a result, the spool 24a of the control valve 24 is returned to the neutral stop position in preference to the wire 43 and the operation arm 44, and the hydraulic cylinder 5 and the seedling planting device 6 stop at the lower limit position.
（操作レバーの第２下降位置による植付クラッチ及び施肥クラッチの伝動位置への操作）
　前述の（操作レバーの第２下降位置による苗植付装置の下降操作）に記載のように、操作レバー７８が、第２下降位置Ｄ２に操作されてから、中立位置Ｎに操作され再び第２下降位置Ｄ２に操作されると（ステップＳ２３，Ｓ２４）、昇降モータ５６により操作軸５５のアーム部５５ｃが、第４位置Ａ４に操作される（ステップＳ２７）。 (Operation of the planting clutch and fertilizer clutch to the transmission position by the second lowering position of the operation lever)
As described above (downward operation of the seedling planting device by the second lowering position of the operating lever), the operating lever 78 is operated to the second lowering position D2, then to the neutral position N, and then to the second position again. When operated to the lowered position D2 (steps S23 and S24), the lifting motor 56 operates the arm portion 55c of the operation shaft 55 to the fourth position A4 (step S27).
　これにより、ワイヤ４３及び操作アーム４４により制御弁２４のスプール２４ａが操作される状態が維持されながら、前述の（昇降モータによる植付クラッチ及び施肥クラッチの伝動位置への操作）に記載のように、植付クラッチ２１及び施肥クラッチ２２が伝動位置に操作される。 As a result, while maintaining the state in which the spool 24a of the control valve 24 is operated by the wire 43 and the operation arm 44, as described in (Operation of the planting clutch and fertilizer clutch to the transmission position by the lifting motor). The planting clutch 21 and the fertilizer application clutch 22 are operated to the transmission position.
（マーカーを作業位置及び格納位置に操作するマーカーの操作構造）
　図１６～図１９に示すように、機体３の後部において運転座席２０の下側で、制御弁２４に対して機体左右中央側の部分に、案内板８８が支持されている。右及び左の操作アーム８９（マーカー操作機構に相当）が、案内板８８の下側の左右方向の軸芯Ｐ１３周りに互いに独立に前後方向に揺動可能に支持されている。 (Operation structure of the marker that operates the marker to the working position and the storage position)
As shown in FIGS. 16 to 19, a guide plate 88 is supported on the lower side of the driver's seat 20 in the rear part of the machine body 3 and on the part on the center side of the machine body with respect to the control valve 24. The right and left operation arms 89 (corresponding to a marker operation mechanism) are supported independently of each other around the axis P13 of the lower side of the guide plate 88 in the left-right direction so as to be swingable in the front-rear direction.
　右の操作アーム８９の上部と右のマーカー２３のアーム部２３ａとに亘って、右のワイヤ９０（マーカー操作機構に相当）が接続され、左の操作アーム８９の上部と左のマーカー２３のアーム部２３ａとに亘って、左のワイヤ９０（マーカー操作機構に相当）が接続されている。 The right wire 90 (corresponding to a marker operating mechanism) is connected across the upper part of the right operation arm 89 and the arm portion 23a of the right marker 23, and the upper part of the left operation arm 89 and the arm of the left marker 23 are connected. The left wire 90 (corresponding to a marker operating mechanism) is connected to the portion 23a.
　案内板８８に、２個の長孔状の開口部８８ａが前後方向に沿って開口されており、操作アーム８９の上端部の操作部８９ａが、案内板８８の開口部８８ａを通って上側に出ている。図１９に示すように、右及び左のマーカー２３を作業位置Ｂ１に付勢する右及び左のバネ９１（マーカー操作機構に相当）が、右及び左のマーカー２３に接続されている。 Two long hole-shaped openings 88a are opened in the guide plate 88 along the front-rear direction, and the operation portion 89a at the upper end of the operation arm 89 passes through the opening 88a of the guide plate 88 to the upper side. Out. As shown in FIG. 19, right and left springs 91 (corresponding to a marker operating mechanism) that bias the right and left markers 23 to the working position B1 are connected to the right and left markers 23.
　機体３の後部において運転座席２０の下側で、機体左右中央側部に、油圧シリンダ５が配置されることにより、操作アーム８９及びワイヤ９０が、油圧シリンダ５に隣接するように、油圧シリンダ５の近傍に配置されている。図１６及び図１９に示すように、油圧シリンダ５のピストンに連結された操作部５ａが、案内板８８の上側で、操作アーム８９の操作部８９ａの後側に配置されている。 By arranging the hydraulic cylinders 5 on the rear side of the machine body 3 below the driver's seat 20 and on the left and right center side of the machine body, the operation arms 89 and the wires 90 are arranged so as to be adjacent to the hydraulic cylinders 5. It is located near. As shown in FIGS. 16 and 19, the operating portion 5a connected to the piston of the hydraulic cylinder 5 is arranged above the guide plate 88 and behind the operating portion 89a of the operating arm 89.
　図１６の二点鎖線に示す状態は、油圧シリンダ５が下降作動（ピストンが伸長作動）して、苗植付装置６が田面Ｇに下降操作された状態である。この状態で、油圧シリンダ５の操作部５ａが、操作アーム８９の操作部８９ａから後側に離れ、マーカー２３がバネ９１により作業位置Ｂ１に操作されており、ワイヤ９０がマーカー２３側に引き操作されて、操作アーム８９の操作部８９ａが案内板８８の開口部８８ａの後端部に位置している。 The state indicated by the chain double-dashed line in FIG. 16 is a state in which the hydraulic cylinder 5 is lowered (the piston is extended) and the seedling planting device 6 is lowered to the rice field G. In this state, the operating portion 5a of the hydraulic cylinder 5 is separated from the operating portion 89a of the operating arm 89 rearward, the marker 23 is operated to the work position B1 by the spring 91, and the wire 90 is pulled to the marker 23 side. Thus, the operating portion 89a of the operating arm 89 is located at the rear end portion of the opening 88a of the guide plate 88.
　図１６の二点鎖線に示す状態から油圧シリンダ５が上昇作動（ピストンが収縮作動）して、苗植付装置６が上昇操作されると、油圧シリンダ５による苗植付装置６の上昇操作に伴なって、油圧シリンダ５の操作部５ａが、前側に移動して操作アーム８９の操作部８９ａに当たり、操作アーム８９が図１６の反時計方向に揺動操作される。これにより、ワイヤ９０が操作アーム８９側に引き操作されて、マーカー２３がバネ９１に抗して格納位置Ｂ２に操作される。 When the hydraulic cylinder 5 is moved upward (the piston is contracted) and the seedling planting device 6 is operated to rise from the state shown by the two-dot chain line in FIG. 16, the hydraulic cylinder 5 raises the seedling planting device 6. Along with this, the operating portion 5a of the hydraulic cylinder 5 moves to the front side and hits the operating portion 89a of the operating arm 89, and the operating arm 89 is oscillated counterclockwise in FIG. As a result, the wire 90 is pulled toward the operation arm 89, and the marker 23 is moved to the storage position B2 against the spring 91.
　油圧シリンダ５が下降作動（ピストンが伸長作動）して、苗植付装置６が下降操作されると、油圧シリンダ５の操作部５ａが、操作アーム８９の操作部８９ａから後側に離れるので、マーカー２３がバネ９１により作業位置Ｂ１に操作されるのであり、ワイヤ９０がマーカー２３側に引き操作されて、操作アーム８９の操作部８９ａが案内板８８の開口部８８ａの後端部に位置する状態に戻る。 When the hydraulic cylinder 5 is lowered (the piston is extended) and the seedling planting device 6 is lowered, the operating portion 5a of the hydraulic cylinder 5 is separated from the operating portion 89a of the operating arm 89 to the rear side. The marker 23 is operated to the work position B1 by the spring 91, the wire 90 is pulled to the marker 23 side, and the operation portion 89a of the operation arm 89 is positioned at the rear end portion of the opening 88a of the guide plate 88. Return to the state.
（マーカーを格納位置に保持するマーカーの保持構造）
　図１６～図１９に示すように、支持ピン９２が案内板８８に上向きに連結されており、右及び左の保持アーム９３（マーカー保持機構に相当）が、支持ピン９２の軸芯Ｐ１４周りに、互いに独立に揺動可能に支持されている。 (Marker holding structure that holds the marker in the storage position)
As shown in FIGS. 16 to 19, the support pin 92 is connected upward to the guide plate 88, and the right and left holding arms 93 (corresponding to the marker holding mechanism) are provided around the axis P14 of the support pin 92. , Swingably supported independently of each other.
　バネ９４（マーカー保持機構に相当）が、支持ピン９２に取り付けられて、バネ９４により、右及び左の保持アーム９３の先端の保持部９３ａが互いに接近し合う方向に、右及び左の保持アーム９３が付勢されている。 A spring 94 (corresponding to a marker holding mechanism) is attached to the support pin 92 so that the holding portions 93a at the tips of the right and left holding arms 93 approach each other by the spring 94 in the right and left holding arms. 93 is activated.
　案内板８８の一部が上側に折り曲げられて当たり部８８ｂが設けられており、保持アーム９３の保持部９３ａが案内板８８の当たり部８８ｂに当たることによって、保持アーム９３の保持部９３ａが、平面視で案内板８８の開口部８８ａと重複する保持位置で止められる。 A part of the guide plate 88 is bent upward and a contact part 88b is provided, and the holding part 93a of the holding arm 93 hits the contact part 88b of the guide plate 88 so that the holding part 93a of the holding arm 93 is flat. It is stopped at the holding position overlapping the opening 88a of the guide plate 88 when viewed.
　前述の（マーカーを作業位置及び格納位置に操作するマーカー操作機構）に記載のように、油圧シリンダ５による苗植付装置６の上昇操作に伴なって、油圧シリンダ５の操作部５ａにより操作アーム８９が図１６の反時計方向に揺動操作されると、操作アーム８９の操作部８９ａが、保持位置の保持アーム９３の保持部９３ａをバネ９４に抗して押し退けながら、図１６及び図１７に示す位置に達する。 As described above (marker operating mechanism for operating the marker to the working position and the retracted position), as the seedling planting device 6 is lifted by the hydraulic cylinder 5, the operating portion 5a of the hydraulic cylinder 5 operates the operating arm. When 89 is rocked counterclockwise in FIG. 16, the operating portion 89a of the operating arm 89 pushes the holding portion 93a of the holding arm 93 in the holding position against the spring 94, and pushes the holding portion 93a away from the holding portion 93a. Reach the position shown in.
　操作アーム８９の操作部８９ａが図１６及び図１７に示す位置に達すると、保持アーム９３がバネ９４により保持位置に戻るのであり、保持アーム９３の保持部９３ａが操作アーム８９の操作部８９ａに係合して、操作アーム８９が図１６及び図１７に示す姿勢に保持される。 When the operating portion 89a of the operating arm 89 reaches the position shown in FIGS. 16 and 17, the holding arm 93 returns to the holding position by the spring 94, and the holding portion 93a of the holding arm 93 becomes the operating portion 89a of the operating arm 89. The operation arm 89 is engaged and held in the posture shown in FIGS. 16 and 17.
　保持アーム９３により操作アーム８９が図１６及び図１７に示す姿勢に保持された状態において、油圧シリンダ５による苗植付装置６の下降操作が行われ、油圧シリンダ５の操作部５ａが後側に移動しても、保持アーム９３により操作アーム８９は図１６及び図１７に示す姿勢に保持されて、マーカー２３は格納位置Ｂ２に保持される。 While the operation arm 89 is held in the posture shown in FIGS. 16 and 17 by the holding arm 93, the seedling planting device 6 is lowered by the hydraulic cylinder 5, and the operating portion 5a of the hydraulic cylinder 5 is moved to the rear side. Even if it moves, the operation arm 89 is held by the holding arm 93 in the posture shown in FIGS. 16 and 17, and the marker 23 is held at the storage position B2.
　これにより、保持アーム９３及びバネ９４が、格納位置Ｂ２に操作された右及び左のマーカー２３を、操作アーム８９、ワイヤ９０及びバネ９１に優先して格納位置Ｂ２に保持する状態となる。 As a result, the holding arm 93 and the spring 94 are in a state of holding the right and left markers 23 operated to the storage position B2 in the storage position B2 in preference to the operation arm 89, the wire 90 and the spring 91.
（マーカーの保持を解除可能なマーカーモータに関する構成）
　図１６，１７，１８に示すように、案内板８８の上側に支持された支持板９５の左右方向の軸芯Ｐ１５周りに、正面視でアングル形状の操作アーム９６が前後方向に揺動可能に支持されている。扇形状の操作ギヤ９６ａが、操作アーム９６と一体で揺動するように操作アーム９６に連結されている。 (Structure related to marker motor that can release marker retention)
As shown in FIGS. 16, 17, and 18, the angle-shaped operation arm 96 in front view can swing in the front-back direction around the horizontal axis P15 of the support plate 95 supported on the upper side of the guide plate 88. It is supported. A fan-shaped operation gear 96a is connected to the operation arm 96 so as to swing integrally with the operation arm 96.
　マーカーモータ９７（マーカーアクチュエータに相当）及び減速機構９８が、支持板９５に連結されており、減速機構９８のピニオンギヤ９８ａが、操作アーム９６の操作ギヤ９６ａに咬合している。マーカーモータ９７により、減速機構９８のピニオンギヤ９８ａが正逆に回転駆動され、操作アーム９６が正逆に揺動操作される。 A marker motor 97 (corresponding to a marker actuator) and a reduction mechanism 98 are connected to a support plate 95, and a pinion gear 98a of the reduction mechanism 98 meshes with an operation gear 96a of an operation arm 96. The marker motor 97 rotationally drives the pinion gear 98a of the reduction mechanism 98 in the forward and reverse directions, and the operation arm 96 is oscillated in the forward and reverse directions.
　操作部材９９が、支持ピン９２の軸芯Ｐ１４周りに、保持アーム９３とは独立に揺動可能に支持されている。操作部材９９は、側面視でチャンネル形状に折り曲げられ、平面視で二股状に形成されて、右及び左の操作部９９ａが設けられており、アーム部９９ｂが横外側に延出されている。 The operation member 99 is swingably supported around the axis P14 of the support pin 92 independently of the holding arm 93. The operation member 99 is bent into a channel shape in a side view, is formed into a bifurcated shape in a plan view, is provided with right and left operation portions 99a, and has an arm portion 99b extending laterally outward.
　保持アーム９３の後部が上側に延出されて操作部９３ｂとなっており、操作部材９９の操作部９９ａが、保持アーム９３の操作部９３ｂの外側に位置している。操作アーム９６の先端部が二股状に形成され、操作部材９９のアーム部９９ｂが操作アーム９６の二股状の先端部に入り込んでおり、操作アーム９６と操作部材９９のアーム部９９ｂとが係合している。 The rear portion of the holding arm 93 extends upward to form an operating portion 93b, and the operating portion 99a of the operating member 99 is located outside the operating portion 93b of the holding arm 93. The distal end portion of the operation arm 96 is formed in a bifurcated shape, the arm portion 99b of the operation member 99 is inserted into the bifurcated distal end portion of the operation arm 96, and the operation arm 96 and the arm portion 99b of the operation member 99 are engaged with each other. doing.
　操作アーム８９及びワイヤ９０が、油圧シリンダ５に隣接するように、油圧シリンダ５の近傍に配置されていることに加えて、案内板８８に保持アーム９３及びバネ９４が支持され、案内板８８の上側にマーカーモータ９７が配置されている。これにより、操作アーム８９及びワイヤ９０と、保持アーム９３及びバネ９４と、マーカーモータ９７とが、油圧シリンダ５の近傍に配置されている。 In addition to the operation arm 89 and the wire 90 being disposed in the vicinity of the hydraulic cylinder 5 so as to be adjacent to the hydraulic cylinder 5, the guide plate 88 supports the holding arm 93 and the spring 94, and A marker motor 97 is arranged on the upper side. As a result, the operation arm 89 and the wire 90, the holding arm 93 and the spring 94, and the marker motor 97 are arranged near the hydraulic cylinder 5.
　右及び左の操作アーム８９が右及び左の保持アーム９３により、マーカー２３の格納位置Ｂ２に保持された状態において、マーカーモータ９７により操作アーム９６が前側に揺動操作されると、操作部材９９が図１７の時計方向に揺動操作される。 When the right and left operation arms 89 are held at the storage position B2 of the marker 23 by the right and left holding arms 93, when the operation arm 96 is rocked forward by the marker motor 97, the operation member 99 is operated. Is oscillated in the clockwise direction in FIG.
　これにより、左の保持アーム９３が保持位置に残された状態で、操作部材９９の右の操作部９９ａにより右の保持アーム９３の操作部９３ｂが押し操作されて、右の保持アーム９３の保持部９３ａが右の操作アーム８９の操作部８９ａから外れる解除位置に、右の保持アーム９３が操作される。 As a result, with the left holding arm 93 left in the holding position, the right operating portion 99a of the operating member 99 pushes the operating portion 93b of the right holding arm 93 to hold the right holding arm 93. The right holding arm 93 is operated to a release position where the portion 93a is disengaged from the operation portion 89a of the right operation arm 89.
　マーカーモータ９７により操作アーム９６が後側に揺動操作されると、操作部材９９が図１７の反時計方向に揺動操作される。これにより、右の保持アーム９３が保持位置に残された状態で、操作部材９９の左の操作部９９ａにより左の保持アーム９３の操作部９３ｂが押し操作されて、左の保持アーム９３の保持部９３ａが左の操作アーム８９の操作部８９ａから外れる解除位置に、左の保持アーム９３が操作される。 When the operation arm 96 is rocked rearward by the marker motor 97, the operation member 99 is rocked counterclockwise in FIG. As a result, with the right holding arm 93 left in the holding position, the left operating arm 93 is pushed by the left operating portion 99a of the operating member 99, and the left holding arm 93 is held. The left holding arm 93 is operated to a release position where the portion 93a is disengaged from the operating portion 89a of the left operating arm 89.
（マーカーモータの操作に関する構成）
　図１７及び図１９に示すように、操作アーム９６の回転角度を検出する位置センサー１１１が、操作アーム９６に接続されており、位置センサー１１１の検出値が制御装置１００に入力されている。位置センサー１１１により操作アーム９６の回転角度が検出されることによって、操作部材９９の位置が検出される。 (Structure related to operation of marker motor)
As shown in FIGS. 17 and 19, the position sensor 111 that detects the rotation angle of the operation arm 96 is connected to the operation arm 96, and the detection value of the position sensor 111 is input to the control device 100. The position of the operation member 99 is detected by detecting the rotation angle of the operation arm 96 by the position sensor 111.
　マーカー制御部１０２が、制御装置１００にソフトウェアとして設けられており、操作レバー７８の操作位置（右マーカー位置Ｒ１及び左マーカー位置Ｌ１）、及び位置センサー１１１の検出値に基づいて、マーカー制御部１０２（制御装置１００）により、マーカーモータ９７が以下の説明のように操作される。 The marker control unit 102 is provided as software in the control device 100, and based on the operation position of the operation lever 78 (right marker position R1 and left marker position L1) and the detection value of the position sensor 111, the marker control unit 102. The marker motor 97 is operated by the (control device 100) as described below.
（操作レバーの右マーカー位置及び左マーカー位置によるマーカーの操作）
　前述の（操作レバーの第１上昇位置による苗植付装置の上昇操作）（操作レバーの第２上昇位置による苗植付装置の上昇操作）に記載のように、操作レバー７８が第１上昇位置Ｕ１又は第２上昇位置Ｕ２に操作されて、苗植付装置６が上昇操作されると、前述の（マーカーを格納位置に保持するマーカー保持機構）に記載のように、右及び左のマーカー２３が格納位置Ｂ２に操作され、右及び左の保持アーム９３により右及び左の操作アーム８９が保持されて、右及び左のマーカー２３が格納位置Ｂ２に保持される。 (Marker operation by the right and left marker positions of the operating lever)
As described in the above (the raising operation of the seedling planting device by the first raising position of the operation lever) (the raising operation of the seedling planting device by the second raising position of the operation lever), the operation lever 78 is set at the first raising position. When the seedling planting device 6 is operated to be raised by operating the U1 or the second elevated position U2, the right and left markers 23 as described in the above (marker holding mechanism for holding the marker in the storage position). Is operated to the storage position B2, the right and left operation arms 89 are held by the right and left holding arms 93, and the right and left markers 23 are held at the storage position B2.
　次に、操作レバー７８が第１下降位置Ｄ１又は第２下降位置Ｄ２に操作されて、苗植付装置６が田面Ｇに下降操作されたとする（油圧シリンダ５の操作部５ａが、操作アーム８９の操作部８９ａから後側に離れた状態）。この状態では、保持アーム９３により操作アーム８９が保持されて、マーカー２３が格納位置Ｂ２に保持されている。 Next, it is assumed that the operation lever 78 is operated to the first descending position D1 or the second descending position D2, and the seedling planting device 6 is descended to the rice field G (the operation portion 5a of the hydraulic cylinder 5 operates the operation arm 89). (The state of being separated from the operation portion 89a to the rear side). In this state, the operation arm 89 is held by the holding arm 93, and the marker 23 is held at the storage position B2.
　操作レバー７８が右マーカー位置Ｒ１に操作されると、前述の（マーカー保持機構を解除可能なマーカーモータに関する構成）に記載のように、マーカーモータ９７により操作アーム９６が前側に揺動操作され、操作部材９９が図１７の時計方向に揺動操作され、右の保持アーム９３が解除位置に操作される。 When the operation lever 78 is operated to the right marker position R1, the operation arm 96 is rocked to the front side by the marker motor 97 as described above (configuration regarding the marker motor capable of releasing the marker holding mechanism), The operation member 99 is rocked in the clockwise direction in FIG. 17, and the right holding arm 93 is operated to the release position.
　これにより、右のマーカー２３がバネ９１により作業位置Ｂ１に操作されるのであり、右のワイヤ９０が右のマーカー２３側に引き操作されて、右の操作アーム８９の操作部８９ａが案内板８８の開口部８８ａの後端部に位置する状態に戻る（図１６の二点鎖線を参照）。 As a result, the right marker 23 is operated to the work position B1 by the spring 91, the right wire 90 is pulled to the right marker 23 side, and the operation portion 89a of the right operation arm 89 is guided by the guide plate 88. It returns to the state of being located at the rear end of the opening 88a (see the chain double-dashed line in FIG. 16).
　操作レバー７８が左マーカー位置Ｌ１に操作されると、前述の（マーカー保持機構を解除可能なマーカーモータに関する構成）に記載のように、マーカーモータ９７により操作アーム９６が後側に揺動操作され、操作部材９９が図１７の反時計方向に揺動操作され、左の保持アーム９３が解除位置に操作される。 When the operation lever 78 is operated to the left marker position L1, the operation arm 96 is oscillated to the rear side by the marker motor 97 as described above (configuration regarding the marker motor capable of releasing the marker holding mechanism). The operating member 99 is swung counterclockwise in FIG. 17, and the left holding arm 93 is operated to the release position.
　これにより、左のマーカー２３がバネ９１により作業位置Ｂ１に操作されるのであり、左のワイヤ９０が左のマーカー２３側に引き操作されて、左の操作アーム８９の操作部８９ａが案内板８８の開口部８８ａの後端部に位置する状態に戻る（図１６の二点鎖線を参照）。 As a result, the left marker 23 is operated to the work position B1 by the spring 91, the left wire 90 is pulled to the left marker 23 side, and the operation portion 89a of the left operation arm 89 is guided by the guide plate 88. It returns to the state of being located at the rear end of the opening 88a (see the chain double-dashed line in FIG. 16).
　操作レバー７８が右マーカー位置Ｒ１（左マーカー位置Ｌ１）に操作された場合、操作アーム８９の操作部８９ａが保持アーム９３の保持部９３ａを通過する為に要する設定時間が経過すると、マーカーモータ９７により操作アーム９６が、図１７に示す位置に戻し操作されて、右（左）の保持アーム９３が保持位置に戻し操作される。 When the operating lever 78 is operated to the right marker position R1 (left marker position L1) and the set time required for the operating portion 89a of the operating arm 89 to pass through the holding portion 93a of the holding arm 93 elapses, the marker motor 97. Thus, the operation arm 96 is returned to the position shown in FIG. 17, and the right (left) holding arm 93 is returned to the holding position.
　苗植付装置６が田面Ｇに下降操作された状態において、操作レバー７８が右マーカー位置Ｒ１に操作され、次に左マーカー位置Ｌ１に操作されると（左マーカー位置Ｌ１に操作され、次に右マーカー位置Ｒ１に操作されると）、右及び左のマーカー２３が作業位置Ｂ１に操作される。 When the operation device 78 is operated to the right marker position R1 and then to the left marker position L1 in the state where the seedling planting device 6 is operated to descend to the rice field G (the left marker position L1 is operated, then the left marker position L1 is operated). When operated to the right marker position R1), the right and left markers 23 are operated to the work position B1.
　苗植付装置６が上昇操作された状態において、操作レバー７８が右マーカー位置Ｒ１（左マーカー位置Ｌ１）に操作されて、保持アーム９３が解除位置に操作されても、油圧シリンダ５の操作部５ａにより、操作アーム８９の操作部８９ａが図１６に示す姿勢に保持されているので、マーカー２３は作業位置Ｂ１に操作されない。 Even when the operation lever 78 is operated to the right marker position R1 (left marker position L1) and the holding arm 93 is operated to the release position in the state where the seedling planting device 6 is operated to be raised, the operating portion of the hydraulic cylinder 5 is operated. Since the operation portion 89a of the operation arm 89 is held in the posture shown in FIG. 16 by 5a, the marker 23 is not operated to the work position B1.
（整地装置の昇降の構成）
　図２０に示すように、扇形の操作ギヤ１１２が、苗植付装置６の前部の上部の前後方向の軸芯Ｐ１６周りに、揺動可能に支持されている。電動モータ１１３及び減速機構１１４が、苗植付装置６の前部の上部に支持されて、減速機構１１４のピニオンギヤが操作ギヤ１１２に咬合している。操作ギヤ１１２と、伝動ケース４６及び支持アーム４７とに亘って連係ロッド１１５が接続されている。 (Structure of raising and lowering of landslide device)
As shown in FIG. 20, a fan-shaped operation gear 112 is swingably supported around an axial center P16 in the front-rear direction above the front part of the seedling planting device 6. The electric motor 113 and the speed reduction mechanism 114 are supported on the upper part of the front part of the seedling planting device 6, and the pinion gear of the speed reduction mechanism 114 meshes with the operation gear 112. A link rod 115 is connected across the operation gear 112, the transmission case 46, and the support arm 47.
　電動モータ１１３により減速機構１１４のピニオンギヤが正逆に回転駆動され、操作ギヤ１１２が正逆に揺動操作されて、整地装置５０（伝動ケース４６及び支持アーム４７）が軸芯Ｐ６周りに昇降操作される。 The electric motor 113 rotationally drives the pinion gear of the reduction mechanism 114 in the forward and reverse directions, swings the operation gear 112 in the forward and reverse directions, and raises and lowers the leveling device 50 (the transmission case 46 and the support arm 47) around the axis P6. To be done.
（整地装置の高さ制御）
　図１及び図２０に示すように、ダイヤル操作型式の整地スイッチ１１６が、操縦ハンドル７７の下側に設けられており、整地スイッチ１１６の操作信号が制御装置１００に入力されている。整地スイッチ１１６に作業位置及び格納位置が設けられており、作業位置の操作範囲において、整地スイッチ１１６により整地装置５０の設定整地深さが任意に設定される。 (Height control of leveling equipment)
As shown in FIGS. 1 and 20, a dial operation type ground leveling switch 116 is provided below the control handle 77, and an operation signal of the ground leveling switch 116 is input to the control device 100. The ground leveling switch 116 is provided with a work position and a storage position, and the ground leveling switch 116 arbitrarily sets the set ground leveling depth of the ground leveling device 50 in the operation range of the work position.
　高さセンサー１１７が、操作ギヤ１１２における軸芯Ｐ１６の部分に接続されて、高さセンサー１１７により苗植付装置６に対する整地装置５０の上下位置が検出されており、高さセンサー１１７の検出値が制御装置１００に入力されている。植付深さレバー２９の操作位置を検出する位置センサー１１８が設けられており、位置センサー１１８の検出値が制御装置１００に入力されている。 The height sensor 117 is connected to the shaft core P16 portion of the operation gear 112, and the height sensor 117 detects the vertical position of the ground leveling device 50 with respect to the seedling planting device 6, and the detected value of the height sensor 117. Is input to the control device 100. A position sensor 118 that detects the operating position of the planting depth lever 29 is provided, and the detection value of the position sensor 118 is input to the control device 100.
　整地制御部１０３が制御装置１００にソフトウェアとして設けられており、整地スイッチ１１６の操作位置、高さセンサー１１７及び位置センサー１１８の検出値に基いて、整地制御部１０３（制御装置１００）により、電動モータ１１３が以下の説明のように操作される。 The ground leveling control unit 103 is provided as software in the control device 100. Based on the operation position of the ground leveling switch 116 and the detection values of the height sensor 117 and the position sensor 118, the ground leveling control unit 103 (control device 100) operates the electric power. The motor 113 is operated as described below.
　位置センサー１１８により植付深さレバー２９の操作位置が検出されることによって、設定高さＨ１（苗の設定植付深さ）（前述の（苗の設定植付深さの変更）及び図１９参照）が検出される。設定高さＨ１（苗の設定植付深さ）と、高さセンサー１１７の検出値（苗植付装置６に対する整地装置５０の上下位置）とに基いて、田面Ｇからの整地装置５０の高さが検出されるのであり、整地装置５０の整地深さＨ２が検出される。 By detecting the operation position of the planting depth lever 29 by the position sensor 118, the set height H1 (set planting depth of seedling) (the above-mentioned (change of set planting depth of seedling) and FIG. (See) is detected. Based on the set height H1 (set planting depth of seedlings) and the detection value of the height sensor 117 (vertical position of the ground leveling device 50 with respect to the seedling planting device 6), the height of the ground leveling device 50 from the surface G. Is detected, and the leveling depth H2 of the leveling device 50 is detected.
　これにより、整地装置５０の整地深さＨ２が、整地スイッチ１１６の設定整地深さとなるように、電動モータ１１３が作動して、整地装置５０が昇降操作される。整地スイッチ１１６の設定整地深さが変更されると、整地装置５０の整地深さＨ２が、変更された整地スイッチ１１６の設定整地深さとなるように、電動モータ１１３が作動して、整地装置５０が昇降操作される。 As a result, the electric motor 113 is operated and the leveling device 50 is moved up and down so that the leveling depth H2 of the leveling device 50 becomes the set leveling depth of the leveling switch 116. When the set ground leveling depth of the ground leveling switch 116 is changed, the electric motor 113 operates so that the ground leveling depth H2 of the ground leveling device 50 becomes the changed set ground leveling depth of the leveling switch 116, and the ground leveling device 50 is operated. Is moved up and down.
　設定高さＨ１（苗の設定植付深さ）が変更されても、位置センサー１１８の検出値（変更された設定高さＨ１（苗の設定植付深さ））と、高さセンサー１１７の検出値とに基いて、整地装置５０の整地深さＨ２が検出され、整地装置５０の整地深さＨ２が、整地スイッチ１１６の設定整地深さとなるように、電動モータ１１３が作動して、整地装置５０が昇降操作される。 Even if the set height H1 (set planting depth of seedling) is changed, the detection value of the position sensor 118 (changed set height H1 (set planting depth of seedling)) and the height sensor 117 Based on the detected value, the ground leveling depth H2 of the ground leveling device 50 is detected, and the electric motor 113 is operated so that the ground leveling depth H2 of the ground leveling device 50 becomes the set ground leveling depth of the ground leveling switch 116. The device 50 is moved up and down.
　整地スイッチ１１６が格納位置に操作されると、電動モータ１１３により整地装置５０が上限位置に上昇操作される。整地装置５０の上限位置は、整地装置５０が田面Ｇから大きく上昇操作されて、整地装置５０が田面Ｇに接地しない位置である。 When the ground leveling switch 116 is operated to the retracted position, the leveling device 50 is moved up to the upper limit position by the electric motor 113. The upper limit position of the leveling device 50 is a position where the leveling device 50 is largely lifted from the field G and the leveling device 50 does not touch the field G.
（畦際での旋回及び植え揃え）
　図２１に示すように、乗用型田植機では、１回の植付行程Ｋ１を終了して、機体３が畦Ｆに手前に達すると、作業者は、操作レバー７８を操作して、苗植付装置６を田面Ｇから上昇操作し（植付クラッチ２１及び施肥クラッチ２２は遮断位置）、操縦ハンドル７７を操作して畦際で旋回Ｊ１を行う。 (Turning and planting on the edge)
As shown in FIG. 21, when the riding type rice transplanter completes one planting process K1 and the aircraft 3 reaches the ridge F, the operator operates the operation lever 78 to plant seedlings. The attachment device 6 is operated to move upward from the rice field G (the planting clutch 21 and the fertilizer application clutch 22 are in the disengaged position), and the steering handle 77 is operated to perform the turning J1 at the edge.
　旋回Ｊ１が終了すると、作業者は、操作レバー７８を操作して、苗植付装置６を田面Ｇに下降操作し、植付クラッチ２１及び施肥クラッチ２２を伝動位置に操作して、次の植付行程Ｋ２に入る。 When the turning J1 is completed, the operator operates the operation lever 78 to lower the seedling planting device 6 to the rice field G, and operates the planting clutch 21 and the fertilizer clutch 22 to the transmission position to perform the next planting. Entering process K2.
　この場合、前の植付行程Ｋ１の終了位置Ｋ１１（植付クラッチ２１及び施肥クラッチ２２が遮断位置に操作された苗植付装置６の位置）と、次の植付行程Ｋ２の開始位置Ｋ２１（植付クラッチ２１及び施肥クラッチ２２が伝動位置に操作された苗植付装置６の位置）とを、一致させる必要がある。 In this case, the end position K11 of the previous planting process K1 (the position of the seedling planting device 6 in which the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position) and the start position K21 of the next planting process K2 ( It is necessary to match the position of the seedling planting device 6 in which the planting clutch 21 and the fertilizer application clutch 22 are operated to the transmission position).
（植え揃え制御部）
　図２０及び図２１に示すように、植え揃え制御部１０４が、制御装置１００にソフトウェアとして設けられている。後輪２の回転数を検出する回転数センサー１２０が設けられており、回転数センサー１２０の検出値が制御装置１００に入力されている。ダイヤル操作型式の植え揃えスイッチ１１９が、操縦ハンドル７７の近傍に設けられており、植え揃えスイッチ１１９の操作信号が制御装置１００に入力されている。 (Planting control unit)
As shown in FIGS. 20 and 21, the planting and assembling control unit 104 is provided as software in the control device 100. A rotation speed sensor 120 that detects the rotation speed of the rear wheel 2 is provided, and the detection value of the rotation speed sensor 120 is input to the control device 100. A dial operation type planting and arranging switch 119 is provided near the steering handle 77, and an operation signal of the planting and arranging switch 119 is input to the control device 100.
　前述の（畦際での旋回及び植え揃え）に記載のように、乗用型田植機が畦際での旋回Ｊ１を行う場合に、回転数センサー１２０の検出値及び前輪１の操向角度等に基づいて、植え揃え制御部１０４により、終了位置Ｋ１１を原点として、植付行程Ｋ１に沿った座標での機体３（苗植付装置６）の位置が検出され、植付行程Ｋ１に沿った方向を基準方向として、基準方向に対する機体３の角度が検出される。 As described in the above (Turning and planting on the edge), when the riding type rice transplanter performs the turning J1 on the edge, the detection value of the rotation speed sensor 120 and the steering angle of the front wheels 1 are changed. Based on this, the planting alignment control unit 104 detects the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting stroke K1 with the end position K11 as the origin, and the direction along the planting stroke K1. The angle of the machine body 3 with respect to the reference direction is detected with reference to.
　終了位置Ｋ１１から旋回Ｊ１が開始されると、機体３（苗植付装置６）の位置が原点（終了位置Ｋ１１）から畦Ｆ側に離れていき、機体３の角度が、基準方向に対して０度から次第に大きくなっていく。 When the turning J1 is started from the end position K11, the position of the machine body 3 (seedling planting device 6) moves away from the origin (end position K11) to the ridge F side, and the angle of the machine body 3 with respect to the reference direction. It gradually grows from 0 degrees.
　前述の機体３の角度が９０度になると、機体３（苗植付装置６）の位置が停止するのであり、旋回Ｊ１が進行により機体３の角度が９０度から１８０度に近づくのに伴って、植付行程Ｋ１に沿った座標での機体３（苗植付装置６）の位置が、原点（終了位置Ｋ１１）に接近していく。 When the angle of the machine body 3 reaches 90 degrees, the position of the machine body 3 (the seedling planting device 6) stops, and as the angle of the machine body 3 approaches 90 degrees to 180 degrees as the turning J1 progresses. The position of the machine body 3 (seedling planting device 6) at the coordinates along the planting process K1 approaches the origin (end position K11).
　これにより、機体３の角度が１８０度となり、植付行程Ｋ１に沿った座標での機体３（苗植付装置６）の位置が、原点（終了位置Ｋ１１）に位置すれば、終了位置Ｋ１１と開始位置Ｋ２１とが、一致したと判断できる。 As a result, the angle of the machine body 3 becomes 180 degrees, and if the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting process K1 is located at the origin (end position K11), the end position K11 is obtained. It can be determined that the start position K21 matches.
　植え揃えスイッチ１１９が作業位置に操作された状態において、植え揃え制御部１０４（制御装置１００）により、終了位置Ｋ１１と開始位置Ｋ２１とが一致するように、昇降モータ５６が以下の説明のように操作される。 When the planting alignment switch 119 is operated to the working position, the planting alignment control unit 104 (control device 100) causes the lifting motor 56 to move the elevator motor 56 as described below so that the end position K11 and the start position K21 coincide with each other. Operated.
　作業者が操作レバー７８を操作して、苗植付装置６が田面Ｇから上昇操作されると、植え揃え制御部１０４は、操作レバー７８が操作された時点で終了位置Ｋ１１を設定し、植付行程Ｋ１に沿った方向を基準方向として設定する。終了位置Ｋ１１を原点として、植付行程Ｋ１に沿った座標での機体３（苗植付装置６）の位置の検出、及び、基準方向に対する機体３の角度の検出が開始される。 When the operator operates the operation lever 78 to raise the seedling planting device 6 from the rice field G, the planting alignment control unit 104 sets the end position K11 at the time when the operation lever 78 is operated, and the planting operation is performed. The direction along the additional process K1 is set as the reference direction. With the end position K11 as the origin, detection of the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting process K1 and detection of the angle of the machine body 3 with respect to the reference direction are started.
　機体３の角度が９０度と１８０度との間に達し、植付行程Ｋ１に沿った座標での機体３（苗植付装置６）の位置が、原点（終了位置Ｋ１１）から少し畦Ｆ側に達すると、植え揃え制御部１０４は、旋回J１の後半に入ったと判断して、昇降制御部１０１に優先して、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃを、第３位置Ａ３に操作して、苗植付装置６を田面Ｇに下降操作する（前述の（操作レバーの第２下降位置による苗植付装置の下降操作）参照）。 The angle of the machine body 3 reaches between 90 degrees and 180 degrees, and the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting process K1 is slightly on the ridge F side from the origin (end position K11). When it reaches, the planting/alignment control unit 104 determines that it has entered the second half of the turning J1, and prioritizes the lifting/lowering control unit 101, the lifting/lowering motor 56 causes the operation unit 55b and the arm unit 55c of the operation shaft 55 to move to the third position. By operating to the position A3, the seedling planting device 6 is lowered to the rice field G (see the above-described (Descent operation of the seedling planting device by the second lowering position of the operation lever)).
　次に機体３の角度が１８０度となり、植付行程Ｋ１に沿った座標での機体３（苗植付装置６）の位置が、原点（終了位置Ｋ１１）に達すると、植え揃え制御部１０４は、昇降制御部１０１に優先して、昇降モータ５６により操作軸５５の操作部５５ｂ及びアーム部５５ｃを、第４位置Ａ４に操作して、植付クラッチ２１及び施肥クラッチ２２を伝動位置に操作する（前述の（操作レバーの第２下降位置による植付クラッチ及び施肥クラッチの伝動位置への操作）参照）。 Next, when the angle of the machine body 3 becomes 180 degrees and the position of the machine body 3 (seedling planting device 6) at the coordinates along the planting process K1 reaches the origin (end position K11), the planting alignment control unit 104 In preference to the lifting control unit 101, the lifting motor 56 operates the operation unit 55b and the arm unit 55c of the operation shaft 55 to the fourth position A4 to operate the planting clutch 21 and the fertilization clutch 22 to the transmission position. (Refer to the above (operation to the transmission position of the planting clutch and the fertilizer application clutch by the second lowered position of the operation lever)).
　植え揃えスイッチ１１９の作業位置の操作範囲において、植え揃えスイッチ１１９を操作することにより、操作軸５５の操作部５５ｂ及びアーム部５５ｃが第４位置Ａ４に操作されるタイミングを、植付行程Ｋ１に沿った座標での機体３（苗植付装置６）の位置が原点（終了位置Ｋ１１）に達する少し前（早め）に設定したり、少し後（遅め）に設定したりすることができる。 By operating the planting/aligning switch 119 within the operating range of the planting/aligning switch 119, the timing at which the operating portion 55b and the arm 55c of the operating shaft 55 are operated to the fourth position A4 is set to the planting stroke K1. The position of the machine body 3 (seedling planting device 6) at the coordinates along the line can be set slightly before (early) or slightly after (late) when the origin (end position K11) is reached.
　これにより、植え揃え制御部１０４の作動状態で、終了位置Ｋ１１と開始位置Ｋ２１とがうまく一致しない場合、作業者が前述のように植え揃えスイッチ１１９を操作することにより、終了位置Ｋ１１と開始位置Ｋ２１とを一致させることができる。 As a result, when the end position K11 and the start position K21 do not match well in the operating state of the planting alignment control unit 104, the operator operates the planting alignment switch 119 as described above, and thereby the end position K11 and the start position K21. K21 can be matched.
　植え揃えスイッチ１１９が停止位置に操作されていると、植え揃え制御部１０４は停止するので、作業者は、終了位置Ｋ１１と開始位置Ｋ２１とが一致するように、操作レバー７８を操作して、苗植付装置６の田面Ｇへの下降操作、植付クラッチ２１及び施肥クラッチ２２の伝動位置への操作を行う。 When the planting alignment switch 119 is operated to the stop position, the planting alignment control unit 104 stops. Therefore, the operator operates the operation lever 78 so that the end position K11 and the start position K21 coincide with each other, The descending operation of the seedling planting device 6 to the rice field G and the operation of the planting clutch 21 and the fertilization clutch 22 to the transmission position are performed.
（発明の実施の第１別形態）
　第１の作業連係機構６１に設けられる融通部６７が、以下の説明のように構成されてもよい。 (First Embodiment of the Invention)
The interchange part 67 provided in the first work linking mechanism 61 may be configured as described below.
　図２５，２６，２７に示すように、制御弁２４及び昇降モータ５６の下側において、右及び左の機体フレーム６０に亘って支持軸７４が連結されている。右の機体フレーム６０の右外側において支持軸７４の端部に、第１の揺動部６４及び第２の揺動部１２１が、左右方向の軸芯Ｐ９周りに、互いに独立に揺動可能に支持されている。 As shown in FIGS. 25, 26, and 27, below the control valve 24 and the lifting motor 56, a support shaft 74 is connected across the right and left body frames 60. The first swinging portion 64 and the second swinging portion 121 are swingable independently of each other around the axis P9 in the left-right direction at the end of the support shaft 74 on the right outer side of the right machine body frame 60. It is supported.
　操作軸５５のアーム部５５ｃと揺動部６４とに亘って、ロッド状の第１の連係部６３が接続されている。昇降モータ５６により操作軸５５が回転操作されることによって、操作軸５５の操作部５５ｂ及びアーム部５５ｃに連動して、揺動部６４が、第１位置Ａ１及び第４位置Ａ４、第２位置Ａ２、第３位置Ａ３に操作される（前述の（苗植付装置の昇降操作用の制御弁及び昇降モータに関する構成）参照）。 A rod-shaped first linking portion 63 is connected across the arm portion 55c of the operating shaft 55 and the swinging portion 64. When the operating shaft 55 is rotationally operated by the lifting motor 56, the swinging unit 64 is linked to the operating unit 55b and the arm unit 55c of the operating shaft 55 so that the swinging unit 64 moves to the first position A1, the fourth position A4, and the second position. A2, 3rd position A3 is operated (refer to the above-mentioned (configuration regarding the control valve for raising/lowering operation of the seedling planting device and the raising/lowering motor)).
　揺動部６４に、ピン状の操作部６４ｄが連結され、揺動部１２１に、軸芯Ｐ９を中心とする円弧状の長孔１２１ａが開口されており、揺動部６４の操作部６４ｄが揺動部１２１の長孔１２１ａに挿入されている。 A pin-shaped operation portion 64d is connected to the swing portion 64, and an arc-shaped long hole 121a centered on the axis P9 is opened in the swing portion 121. It is inserted in the long hole 121a of the swinging part 121.
　これにより、揺動部６４の操作部６４ｄと揺動部１２１の長孔１２１ａとが設けられた融通部６７が、第１の揺動部６４と第２の揺動部１２１とに亘って設けられ、第１の作業連係機構６１に設けられている。 As a result, the interchange portion 67 provided with the operation portion 64d of the swing portion 64 and the elongated hole 121a of the swing portion 121 is provided across the first swing portion 64 and the second swing portion 121. And is provided in the first work linkage mechanism 61.
　ロッド状の第２の連係部６５が、揺動部１２１に接続されて、機体フレーム６０の長孔６０ａを通って右及び左の機体フレーム６０の間に入り込んでいる。連係部６５が、前側に延出されて、操作部材６９及び連係部材７０に接続されている（前述の（植付クラッチを操作する操作部材）参照）。この場合、長さ調節部６６は設けられていない。 The rod-shaped second linking portion 65 is connected to the swinging portion 121 and passes between the right and left body frames 60 through the long hole 60 a of the body frame 60. The link portion 65 extends to the front side and is connected to the operation member 69 and the link member 70 (see the above-mentioned (operation member for operating the planting clutch)). In this case, the length adjusting unit 66 is not provided.
　図２５に示すように、昇降モータ５６により揺動部６４が第１位置Ａ１に操作されていると、揺動部６４の操作部６４ｄが、揺動部１２１の長孔１２１ａの上端部に位置しており、植付クラッチ２１及び施肥クラッチ２２は遮断位置に操作されている。 As shown in FIG. 25, when the oscillating portion 64 is operated to the first position A1 by the lifting motor 56, the operating portion 64d of the oscillating portion 64 is positioned at the upper end portion of the long hole 121a of the oscillating portion 121. Therefore, the planting clutch 21 and the fertilizer application clutch 22 are operated to the disengagement position.
　昇降モータ５６により操作軸５５のアーム部５５ｃ及び揺動部６４が、第２位置Ａ２及び第３位置Ａ３に操作されても、揺動部６４の操作部６４ｄが、揺動部１２１の長孔１２１ａに沿って移動するだけで、揺動部１２１は揺動操作されず、植付クラッチ２１及び施肥クラッチ２２は遮断位置に維持される。 Even when the arm portion 55c and the swinging portion 64 of the operating shaft 55 are operated to the second position A2 and the third position A3 by the lifting motor 56, the operating portion 64d of the swinging portion 64 does not have the long hole of the swinging portion 121. Only by moving along 121a, the rocking portion 121 is not rocked, and the planting clutch 21 and the fertilizing clutch 22 are maintained in the disengaged position.
　図２５から図２６に示すように、昇降モータ５６により揺動部６４が第４位置Ａ４に操作されると、揺動部６４の操作部６４ｄが揺動部１２１の長孔１２１ａの上端部に達し、揺動部６４及び揺動部１２１が、一体で図２６の反時計方向に揺動操作されて、連係部６５が後側に引き操作される。
　これにより、植付クラッチ２１及び施肥クラッチ２２が伝動位置に操作される（前述の（昇降モータによる植付クラッチ及び施肥クラッチの伝動位置への操作）参照）。 As shown in FIG. 25 to FIG. 26, when the swing motor 64 is operated to the fourth position A4 by the lifting motor 56, the operating portion 64d of the swing portion 64 comes to the upper end of the long hole 121a of the swing portion 121. 26, the rocking portion 64 and the rocking portion 121 are integrally rocked in the counterclockwise direction in FIG. 26, and the link portion 65 is pulled rearward.
As a result, the planting clutch 21 and the fertilizer application clutch 22 are operated to the transmission position (see the above-mentioned (operation of the planting clutch and the fertilizer application clutch to the transmission position by the lifting motor)).
（発明の実施の第２別形態）
　エンジン３４の停止操作が行われた状態において、操作レバー７８が例えば第２下降位置Ｄ２に操作され中立位置Ｎに操作されてから再び第２下降位置Ｄ２に操作されるというように、操作レバー７８が特定方向に操作されると、昇降制御部１０１（制御装置１００）により、昇降モータ５６が作動操作されて、操作軸５５のアーム部５５ｃが第４位置Ａ４に操作され、植付クラッチ２１及び施肥クラッチ２２が伝動位置に操作されてもよい。 (Second Embodiment of the Invention)
In a state where the engine 34 is stopped, the operating lever 78 is operated to, for example, the second descending position D2, to the neutral position N, and then to the second descending position D2 again. Is operated in a specific direction, the elevating/lowering control unit 101 (control device 100) operates the elevating/lowering motor 56 to operate the arm portion 55c of the operation shaft 55 to the fourth position A4, and the planting clutch 21 and The fertilizer application clutch 22 may be operated to the transmission position.
　苗植付装置６を作動及び停止させる植付クラッチ２１は、一般に、定位置停止機能が備えられている。植付クラッチ２１の定位置停止機能は、回転ケース１０の２組の植付アーム１１の両方が、田面Ｇから上側に位置する状態（例えば一方の植付アーム１１が田面Ｇへの苗の植え付けを終了して田面Ｇから少し上昇し、他方の植付アーム１１が苗のせ台１３の下部から苗を取り出す直前の状態）で、回転ケース１０を停止させて固定する機能である。 The planting clutch 21 that operates and stops the seedling planting device 6 is generally provided with a fixed position stopping function. The fixed position stopping function of the planting clutch 21 is a state in which both of the two sets of planting arms 11 of the rotating case 10 are located above the rice field G (for example, one planting arm 11 planting seedlings on the rice field G). Is a little higher than the rice field surface G and the other planting arm 11 immediately before taking out the seedling from the lower part of the seedling stand 13), the rotation case 10 is stopped and fixed.
　これにより、エンジン３４を停止させた状態で、作業者が手動で回転ケース１０を回転させて、植付アーム１１による苗の取り出し量の確認等のメンテナンス作業を行う場合、植付クラッチ２１が遮断位置に操作されて、前述の定位置停止機能が働いていると、手動で回転ケース１０を回転させることが困難になる。 As a result, when the operator manually rotates the rotating case 10 with the engine 34 stopped to perform maintenance work such as checking the amount of seedlings taken out by the planting arm 11, the planting clutch 21 is disengaged. When it is operated to the position and the above-mentioned fixed position stop function is working, it becomes difficult to rotate the rotating case 10 manually.
　従って、エンジン３４を停止させた状態で、前述のように植付クラッチ２１を伝動位置に操作することができると、定位置停止機能が働かなくなるので、作業者が手動で回転ケース１０を回転させることが無理なく行えるのであり、各種のメンテナンス作業が行い易くなる。 Therefore, if the planting clutch 21 can be operated to the transmission position as described above with the engine 34 stopped, the fixed position stop function does not work, and the operator manually rotates the rotating case 10. This makes it easy to perform various maintenance work.
（発明の実施の第３別形態）
　操作レバー７８が中立位置Ｎに操作された状態において、エンジン３４の停止操作が行われると、昇降制御部１０１（制御装置１００）により、昇降モータ５６が作動操作されて、操作軸５５のアーム部５５ｃが第２位置Ａ２に操作され、ワイヤ４３及び操作アーム４４に優先して、制御弁２４のスプール２４ａが中立停止位置に押し操作されてもよい。 (Third Alternative Embodiment of the Invention)
When the engine 34 is stopped while the operation lever 78 is operated to the neutral position N, the lift control unit 101 (control device 100) operates the lift motor 56 to operate the arm unit of the operation shaft 55. 55c may be operated to the second position A2, and the spool 24a of the control valve 24 may be pushed to the neutral stop position in preference to the wire 43 and the operation arm 44.
　操作レバー７８が第１下降位置Ｄ１又は第２下降位置Ｄ２に保持された状態において、エンジン３４の停止操作が行われると、前述のような昇降制御部１０１（制御装置１００）による操作が行われないように構成されてもよい。 If the engine 34 is stopped while the operation lever 78 is held at the first lowered position D1 or the second lowered position D2, the above-described lifting control unit 101 (control device 100) performs the operation. It may be configured not to.
（発明の実施の第４別形態）
　図１に示すように、機体３の前端部に、正面視でアーチ状の操作アーム１２２が設けられることがあり、操作アーム１２２は、図１に示す起立姿勢及び機体３から前側に延出された使用姿勢に、姿勢変更可能に支持されている。 (Fourth Embodiment of Implementation of the Invention)
As shown in FIG. 1, an arch-shaped operation arm 122 may be provided at the front end of the machine body 3 in a front view, and the operation arm 122 extends from the standing posture and the machine body 3 shown in FIG. 1 to the front side. It is supported so that it can be used in different postures.
　通常の植付作業では、操作アーム１２２は起立姿勢に操作されている。畦Ｆを越えて乗用型田植機を水田に進入させる場合や水田から出る場合、機体３の前に立つ作業者が、使用姿勢の操作アーム１２２を持つことにより、機体３の前部の浮き上がりを押さえたり、機体３の向きの修正を行うことができる。 In normal planting work, the operation arm 122 is operated in a standing posture. When the riding-type rice transplanter crosses the ridge F and enters or leaves the paddy field, the operator standing in front of the machine body 3 holds the operating arm 122 in the use posture to lift the front part of the machine body 3 up. It can be pressed or the orientation of the machine body 3 can be corrected.
　前述のような操作アーム１２２において、操作アーム１２２の上部に、タクトスイッチ型式のエンジン停止スイッチ（図示せず）が設けられてもよい。
　これにより、機体３の前に立つ作業者が使用姿勢の操作アーム１２２を持つ場合、作業者がエンジン停止スイッチを操作することにより、エンジン３４が停止操作されるのであり、これと同時にブザー等の警報音が鳴る。 In the operation arm 122 as described above, a tact switch type engine stop switch (not shown) may be provided above the operation arm 122.
As a result, when the worker standing in front of the machine body 3 has the operation arm 122 in the use posture, the operator operates the engine stop switch to stop the engine 34, and at the same time, the buzzer and the like are operated. An alarm sounds.
（発明の実施の第５別形態）
　角度センサー７９を廃止して、リンク機構４が上限位置に達したことを検出する上限位置スイッチ（図示せず）（上限位置検出部に相当）と、リンク機構４が下限位置に達したことを検出する下限位置スイッチ（図示せず）（下限位置検出部に相当）とを、別々に設けてもよい。 (Fifth Embodiment of the Invention)
The upper limit position switch (not shown) (corresponding to the upper limit position detection unit) for detecting that the link mechanism 4 has reached the upper limit position by eliminating the angle sensor 79, and that the link mechanism 4 has reached the lower limit position. A lower limit position switch (not shown) for detection (corresponding to a lower limit position detection unit) may be separately provided.
　本発明は、乗用型田植機ばかりではなく、田面Ｇに種子を供給する播種装置（作業装置に相当）（図示せず）を備えた乗用型直播機や、田面Ｇに薬剤を供給する供給装置（作業装置に相当）（図示せず）を備えた乗用型散布機にも適用できる。 INDUSTRIAL APPLICABILITY The present invention is not limited to a riding type rice transplanter, but a riding type direct seeding device equipped with a seeding device (corresponding to a working device) (not shown) for feeding seeds to a rice field G, and a feeding device for supplying a drug to the rice field G. It can also be applied to a riding type spreader equipped with (corresponding to a working device) (not shown).
　３　　　機体
　５　　　油圧シリンダ
　６　　　苗植付装置（作業装置）
　１２　　フロート
　２１　　植付クラッチ（作業クラッチ）
　２３　　マーカー
　２４　　制御弁
　２４ａ　スプール
　３４　　エンジン
　４３　　ワイヤ（昇降連係機構）
　４４　　操作アーム（昇降連係機構）
　４４ａ　操作部
　５５ｂ　操作部
　５６　　昇降モータ（昇降アクチュエータ）
　７８　　操作レバー（操作具）
　７９　　角度センサー（上限位置検出部）（下限位置検出部）
　８９　　操作アーム（マーカー操作機構）
　９０　　ワイヤ（マーカー操作機構）
　９１　　バネ（マーカー操作機構）
　９３　　保持アーム（マーカー保持機構）
　９４　　バネ（マーカー保持機構）
　９７　　マーカーモータ（マーカーアクチュエータ）
　１０１　昇降制御部
　１０２　マーカー制御部
　Ｂ１　　作業位置
　Ｂ２　　格納位置
　Ｇ　　　田面
　Ｈ１　　設定高さ
　Ｕ２　　第２上昇位置（上昇位置）
　Ｄ２　　第２下降位置（下降位置）
　Ｒ１　　右マーカー位置
　Ｌ１　　左マーカー位置 3 Airframe 5 Hydraulic cylinder 6 Seedling planting device (working device)
12 Float 21 Clutch with planting (work clutch)
23 Marker 24 Control Valve 24a Spool 34 Engine 43 Wire (elevating link mechanism)
44 Operation arm (elevation linkage mechanism)
44a Operation part 55b Operation part 56 Lifting motor (lifting actuator)
78 Operation lever (operation tool)
79 Angle sensor (upper limit position detector) (lower limit position detector)
89 Operation arm (marker operation mechanism)
90 wires (marker operation mechanism)
91 Spring (Marker operation mechanism)
93 Holding arm (Marker holding mechanism)
94 spring (marker holding mechanism)
97 Marker motor (marker actuator)
101 Lifting/lowering control unit 102 Marker control unit B1 Working position B2 Storage position G Tab surface H1 Set height U2 Second rising position (raising position)
D2 Second lowered position (lowered position)
R1 right marker position L1 left marker position

Claims (10)

  1. 　機体に昇降可能に支持された作業装置と、前記作業装置に動力を伝動及び遮断可能な作業クラッチと、前記作業装置を昇降操作する油圧シリンダと、
    　前記油圧シリンダに作動油を給排操作して、前記油圧シリンダを作動させる制御弁と、
    　前記制御弁を操作して、前記作業装置を田面から設定高さに維持する昇降連係機構とが備えられ、
    　前記制御弁及び前記作業クラッチを操作可能な昇降アクチュエータと、
    　人為的に操作可能な操作具と、
    　前記操作具の操作に基づいて前記昇降アクチュエータを作動させる昇降制御部とが備えられて、
    　前記昇降制御部は、
    　前記操作具が上昇位置に操作されると、前記作業クラッチが遮断位置に操作され、且つ、前記昇降連係機構に優先して前記制御弁が上昇作動位置に操作されて維持されるように、前記昇降アクチュエータを作動させる水田作業機。     A work device supported by a machine body so as to be able to move up and down, a work clutch capable of transmitting and disconnecting power to and from the work device, and a hydraulic cylinder for operating the work device up and down.
    A control valve that operates the hydraulic cylinder by supplying and discharging hydraulic oil to and from the hydraulic cylinder,
    An elevator linkage mechanism for operating the control valve to maintain the working device at a set height from a field surface is provided.
    An elevating actuator capable of operating the control valve and the work clutch,
    An operation tool that can be operated artificially,
    An elevating control unit that operates the elevating actuator based on the operation of the operation tool is provided,
    The lifting control unit,
    When the operating tool is operated to the raised position, the work clutch is operated to the disengaged position, and the control valve is operated to and maintained at the raised operating position in preference to the elevating and lowering mechanism. Paddy work machine that operates the lifting actuator.
  2. 　前記昇降制御部は、
    　前記操作具が下降位置に操作されると、前記作業クラッチが遮断位置に操作され、且つ、前記昇降連係機構により前記制御弁が操作される状態に維持されるように、前記昇降アクチュエータを作動させる請求項１に記載の水田作業機。     The lifting control unit,
    When the operating tool is operated to the lowered position, the working clutch is operated to the disengaged position, and the lifting actuator is operated so that the control valve is operated by the lifting linkage mechanism. The paddy work machine according to claim 1.
  3. 　前記昇降制御部は、
    　前記操作具が下降位置に操作されてから再び下降位置に操作されると、前記昇降連係機構により前記制御弁が操作される状態が維持されながら、前記作業クラッチが伝動位置に操作されるように、前記昇降アクチュエータを作動させる請求項２に記載の水田作業機。     The lifting control unit,
    When the operating tool is operated to the descending position and then to the descending position again, the working clutch is operated to the transmission position while maintaining the state in which the control valve is operated by the elevating and lowering linkage mechanism. The paddy work machine according to claim 2, wherein the lifting actuator is operated.
  4. 　前記作業装置の昇降範囲の上限位置に前記作業装置が上昇したことを検出する上限位置検出部が備えられ、
    　前記昇降制御部は、
    　前記上限位置検出部により前記作業装置が上限位置に上昇したことが検出されると、前記昇降連係機構に優先して前記制御弁が中立停止位置に操作されるように、前記昇降アクチュエータを作動させる請求項１～３のうちのいずれか一項に記載の水田作業機。     An upper limit position detection unit that detects that the working device has risen to the upper limit position of the lifting range of the working device is provided,
    The lifting control unit,
    When the upper limit position detection unit detects that the working device is raised to the upper limit position, the lift actuator is operated so that the control valve is operated to the neutral stop position in preference to the lift linkage mechanism. The paddy work machine according to any one of claims 1 to 3.
  5. 　前記作業装置の昇降範囲の下限位置に前記作業装置が下降したことを検出する下限位置検出部が備えられ、
    　前記昇降制御部は、
    　前記下限位置検出部により前記作業装置が下限位置に下降したことが検出されると、前記昇降連係機構に優先して前記制御弁が中立停止位置に操作されるように、前記昇降アクチュエータを作動させる請求項４に記載の水田作業機。     A lower limit position detection unit that detects that the working device is lowered to the lower limit position of the lifting range of the working device is provided,
    The lifting control unit,
    When the lower limit position detection unit detects that the working device is lowered to the lower limit position, the lifting actuator is operated so that the control valve is operated to the neutral stop position in preference to the lifting linkage mechanism. The paddy work machine according to claim 4.
  6. 　前記作業装置に昇降可能に支持されて田面に接地追従するフロートと、
    　前記制御弁と前記フロートとに亘って設けられ、前記フロートに対する前記作業装置の高さを前記制御弁に機械的に伝達し前記制御弁を操作して、前記作業装置を田面から前記設定高さに維持する前記昇降連係機構とが備えられている請求項１～５のうちのいずれか一項に記載の水田作業機。     A float that is supported by the working device so as to be able to move up and down and follows the ground contact with the rice field,
    Provided over the control valve and the float, mechanically transmitting the height of the working device with respect to the float to the control valve to operate the control valve, so that the working device is set at the set height. The paddy work machine according to any one of claims 1 to 5, further comprising: the up-and-down linkage mechanism that is maintained at.
  7. 　前記制御弁が下降作動位置に付勢されて、
    　前記昇降連係機構は、
    　前記作業装置が田面から前記設定高さに位置していると、前記制御弁を中立停止位置に止め、前記フロートが前記作業装置に対して上昇すると、前記制御弁を上昇作動位置に押し操作し、前記フロートが前記作業装置に対して下降すると、前記制御弁の下降作動位置への作動を許容し、
    　前記昇降アクチュエータは、
    　前記昇降連係機構とは別に、前記制御弁を上昇作動位置に押し操作し、前記制御弁を中立停止位置に止め、前記制御弁の下降作動位置への作動を許容する請求項６に記載の水田作業機。     The control valve is biased to the lowered operating position,
    The lifting linkage mechanism is
    When the work device is located at the set height from the rice field, the control valve is stopped at the neutral stop position, and when the float rises with respect to the work device, the control valve is pushed to the rising operation position. When the float descends with respect to the working device, the control valve is allowed to operate in a descending operation position,
    The lifting actuator is
    7. The paddy field according to claim 6, wherein the control valve is pushed to an ascending operation position to stop the control valve at a neutral stop position, and the operation to the descending operation position of the control valve is allowed separately from the ascending and descending linkage mechanism. Working machine.
  8. 　中立停止位置を間に挟んで、一方側の上昇作動位置及び他方側の下降作動位置にスライド可能なスプールが、前記制御弁に設けられ、
    　前記スプールが下降作動位置に付勢されて、
    　前記昇降連係機構の操作部と前記昇降アクチュエータの操作部とが、前記スプールの端部に対向して並ぶように配置されて、
    　前記昇降連係機構の操作部と前記昇降アクチュエータの操作部とが別々に、前記スプールを下降作動位置から、中立停止位置及び上昇作動位置に押し操作する請求項７に記載の水田作業機。     The control valve is provided with a spool that is slidable between a rising operation position on one side and a descending operation position on the other side with the neutral stop position interposed therebetween.
    The spool is urged to the lowering operation position,
    An operating portion of the lifting/lowering linkage mechanism and an operating portion of the lifting/lowering actuator are arranged so as to be lined up facing the end of the spool,
    The paddy work machine according to claim 7, wherein the operation unit of the elevating and lowering linkage mechanism and the operation unit of the elevating and lowering actuator separately push the spool from the lowering operation position to the neutral stop position and the ascending operation position.
  9. 　作業行程の指標を田面に形成する作業位置、及び田面から上側の格納位置に昇降可能に支持された右及び左のマーカーと、
    　前記作業装置が田面から上昇操作されるのに伴って、右及び左の前記マーカーを前記格納位置に操作し、前記作業装置が田面に下降操作されるのに伴って、右及び左の前記マーカーを前記作業位置に操作する右及び左のマーカー操作機構と、
    　前記格納位置に操作された右及び左の前記マーカーを、前記マーカー操作機構に優先して前記格納位置に保持する右及び左のマーカー保持機構とが備えられ、
    　右及び左の前記マーカー保持機構を解除位置に操作可能なマーカーアクチュエータと、
    　前記操作具の操作に基いて前記マーカーアクチュエータを作動させるマーカー制御部とが備えられて、
    　前記マーカー制御部は、
    　前記操作具が右マーカー位置に操作されると、右の前記マーカー保持機構が解除位置に操作されるように、前記マーカーアクチュエータを作動させ、
    　前記操作具が左マーカー位置に操作されると、左の前記マーカー保持機構が解除位置に操作されるように、前記マーカーアクチュエータを作動させる請求項１～８のうちのいずれか一項に記載の水田作業機。     A work position that forms an index of the work process on the rice field, and right and left markers supported up and down to a storage position above the rice field,
    As the working device is operated to rise from the field, the right and left markers are operated to the storage position, and as the working device is operated to descend to the field, the right and left markers are operated. And a right and left marker operating mechanism for operating the working position,
    The right and left markers operated to the storage position, the right and left marker holding mechanism for holding the marker operation mechanism in the storage position in preference to the marker operation mechanism,
    A marker actuator capable of operating the right and left marker holding mechanisms to a release position,
    A marker control unit that operates the marker actuator based on the operation of the operation tool is provided,
    The marker control unit,
    When the operating tool is operated to the right marker position, the marker actuator is operated so that the right marker holding mechanism is operated to the release position,
    9. The marker actuator according to claim 1, wherein when the operation tool is operated to a left marker position, the marker actuator is operated so that the left marker holding mechanism is operated to a release position. Paddy work machine.
  10. 　前記マーカー操作機構と前記マーカー保持機構と前記マーカーアクチュエータとが、前記油圧シリンダの近傍に配置されて、
    　前記油圧シリンダによる前記作業装置の上昇操作に伴なって、前記油圧シリンダにより前記マーカー操作機構が操作されて、前記マーカーが前記格納位置に操作され、
    　前記マーカーを前記格納位置に操作した前記マーカー操作機構が、前記マーカー保持機構により保持されることにより、前記マーカーが前記格納位置に保持され、
    　前記油圧シリンダにより前記作業装置が田面に下降操作された状態において、前記マーカー保持機構が、前記マーカーアクチュエータにより解除位置に操作されることにより、前記格納位置の前記マーカーが前記作業位置に操作される請求項９に記載の水田作業機。
          The marker operating mechanism, the marker holding mechanism, and the marker actuator are arranged in the vicinity of the hydraulic cylinder,
    With the lifting operation of the working device by the hydraulic cylinder, the marker operating mechanism is operated by the hydraulic cylinder, and the marker is operated to the storage position,
    The marker operating mechanism operating the marker to the storage position is held by the marker holding mechanism, whereby the marker is held at the storage position,
    The marker holding mechanism is operated to the release position by the marker actuator in a state where the working device is lowered to the field surface by the hydraulic cylinder, whereby the marker in the storage position is operated to the working position. The paddy work machine according to claim 9.
PCT/JP2019/019845 2018-12-26 2019-05-20 Paddy field work machine WO2020136937A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980077061.9A CN113163711B (en) 2018-12-26 2019-05-20 Paddy field working machine
KR1020217014455A KR20210103461A (en) 2018-12-26 2019-05-20 faucet working machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018243335A JP7178897B2 (en) 2018-12-26 2018-12-26 Paddy work machine
JP2018-243335 2018-12-26

Publications (1)

Publication Number Publication Date
WO2020136937A1 true WO2020136937A1 (en) 2020-07-02

Family

ID=71127016

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/019845 WO2020136937A1 (en) 2018-12-26 2019-05-20 Paddy field work machine

Country Status (4)

Country Link
JP (1) JP7178897B2 (en)
KR (1) KR20210103461A (en)
CN (1) CN113163711B (en)
WO (1) WO2020136937A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001275410A (en) * 2000-03-31 2001-10-09 Kubota Corp Paddy field working machine
JP2003250314A (en) * 2003-03-31 2003-09-09 Kubota Corp Rice transplanter
JP3970010B2 (en) * 2001-12-11 2007-09-05 株式会社 神崎高級工機製作所 Hydraulic control device for work equipment
JP4145197B2 (en) * 2003-05-30 2008-09-03 株式会社クボタ Passenger work vehicle
JP2008237062A (en) * 2007-03-26 2008-10-09 Kubota Corp Paddy working machine
JP2014187887A (en) * 2013-03-26 2014-10-06 Yanmar Co Ltd Rice transplanter
JP2018117564A (en) * 2017-01-24 2018-08-02 株式会社クボタ Agricultural work vehicle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4032922B2 (en) * 2002-10-28 2008-01-16 三菱電機株式会社 Display device and display panel
CN106717372A (en) 2016-11-30 2017-05-31 江苏农华智慧农业科技股份有限公司 A kind of sitting type high-speed transplanter strap cam or so liner agency

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001275410A (en) * 2000-03-31 2001-10-09 Kubota Corp Paddy field working machine
JP3970010B2 (en) * 2001-12-11 2007-09-05 株式会社 神崎高級工機製作所 Hydraulic control device for work equipment
JP2003250314A (en) * 2003-03-31 2003-09-09 Kubota Corp Rice transplanter
JP4145197B2 (en) * 2003-05-30 2008-09-03 株式会社クボタ Passenger work vehicle
JP2008237062A (en) * 2007-03-26 2008-10-09 Kubota Corp Paddy working machine
JP2014187887A (en) * 2013-03-26 2014-10-06 Yanmar Co Ltd Rice transplanter
JP2018117564A (en) * 2017-01-24 2018-08-02 株式会社クボタ Agricultural work vehicle

Also Published As

Publication number Publication date
CN113163711A (en) 2021-07-23
KR20210103461A (en) 2021-08-23
CN113163711B (en) 2023-03-28
JP2020103080A (en) 2020-07-09
JP7178897B2 (en) 2022-11-28

Similar Documents

Publication Publication Date Title
JP7044693B2 (en) Paddy field work machine
CN100433965C (en) Paddy field working rig
WO2020136937A1 (en) Paddy field work machine
JP7304995B2 (en) Paddy work machine
JP2020115748A (en) Rice field implement
JP2020110064A (en) Rice field implement
JP2020103212A (en) Paddy field working machine
JP5060156B2 (en) Paddy field machine
JP5642600B2 (en) Mobile farm machine
JP2008054649A (en) Paddy field working machine
JP4617205B2 (en) Transplanter
JP6971904B2 (en) Paddy field work machine
JP5253220B2 (en) Rice transplanter
JP3759009B2 (en) Working vehicle lifting mechanism
JP3659859B2 (en) Paddy field machine
JP5874807B2 (en) Seedling transplanter
JP2006238790A (en) Paddy working machine
JP3770758B2 (en) Working vehicle lifting mechanism
JP2013243949A (en) Seedling transplanter
WO2016035612A1 (en) Harvester
JP4424472B2 (en) Paddy field machine
JP2020124128A (en) Implement
JP3888241B2 (en) Seedling transplanter
JP2000253707A (en) Paddy field working vehicle
JP2002101713A (en) Implement for paddy field

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19901565

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19901565

Country of ref document: EP

Kind code of ref document: A1