WO2022009578A1 - Paddy field work machine - Google Patents

Paddy field work machine Download PDF

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Publication number
WO2022009578A1
WO2022009578A1 PCT/JP2021/021474 JP2021021474W WO2022009578A1 WO 2022009578 A1 WO2022009578 A1 WO 2022009578A1 JP 2021021474 W JP2021021474 W JP 2021021474W WO 2022009578 A1 WO2022009578 A1 WO 2022009578A1
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WO
WIPO (PCT)
Prior art keywords
height
float
height sensor
working
support
Prior art date
Application number
PCT/JP2021/021474
Other languages
French (fr)
Japanese (ja)
Inventor
田尾哲也
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 KR1020227044472A priority Critical patent/KR20230036068A/en
Priority to CN202180040838.1A priority patent/CN115666219A/en
Publication of WO2022009578A1 publication Critical patent/WO2022009578A1/en

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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
    • 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
    • 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 raising and lowering a working device at the rear of the machine in a paddy field working machine such as a riding type rice transplanter or a riding type direct seeding machine.
  • a float that follows the ground surface of the rice field is supported so as to be able to move up and down at the lower part of the work device, and a height sensor is attached to the work device.
  • the rod is connected across the float and the height sensor.
  • An object of the present invention is to prevent mud and water blown backward from the machine body from adhering to the height sensor in a paddy field work machine in which a work device is supported at the rear part of the machine body.
  • the paddy field working machine of the present invention is supported by the rear part of the machine body so as to be able to move up and down, and supplies materials to the rice field surface.
  • a float that is supported up and down and follows the ground surface, a height sensor provided in a portion of the work equipment behind the front end of the float, and the float and the height sensor.
  • a link mechanism that transmits the lifting operation of the float to the working device to the height sensor so that the height sensor detects the working height from the float to the working device.
  • a control unit for operating the elevating mechanism is provided so that the working height becomes a preset height based on the detection value of the height sensor.
  • a float and a height sensor are provided in a working device at the rear of the machine, and a height sensor is a front end of the float in a state where a link mechanism is connected between the float and the height sensor. It is located behind the aircraft and away from the aircraft. This makes it difficult for mud and water to adhere to the height sensor even if mud and water are blown backward from the aircraft, and it is possible to prevent the durability of the height sensor from decreasing due to the adhesion of mud and water. can.
  • the link mechanism is supported by the working device so as to be swingable around the support shaft core along the left-right direction, extends forward from the support shaft core, and is connected to the float.
  • a swing member provided with a second portion extending upward from the support shaft core, and arranged along the front-rear direction, extending over the input portion of the height sensor and the second portion. It is preferable to have a connecting member connected to the vehicle.
  • a swing member and a connecting member are provided in a link mechanism connected to the float and the height sensor.
  • the swing member of the link mechanism swings around the support axis, and the connection member moves back and forth with respect to the work device.
  • the lifting operation of the float is transmitted to the height sensor, and the working height from the float to the working device is detected by the height sensor.
  • the swing member is provided with a second portion extending upward from the support shaft core, and the connecting member along the front-rear direction is the input portion of the height sensor and the second portion of the swing member. It is connected over and over.
  • the second portion of the rocking member arranges the height sensor at a relatively high position from the float (field surface), which is advantageous in that mud and water are less likely to adhere to the height sensor.
  • the input portion extends downward from the height sensor, and the lower portion of the input portion and the rear portion of the connecting member are connected to each other.
  • the input portion of the height sensor extends downward from the height sensor.
  • the position of the height sensor is higher than the swing member by the amount that the input part of the height sensor extends downward, so the height sensor is placed at a relatively high position from the float (field surface). This is advantageous in that mud and water are less likely to adhere to the height sensor.
  • the spring support portion is provided on the rear side with respect to the swing member, and the tension spring is connected to the first portion and the spring support portion by the urging force of the tension spring. It is preferable that the float is urged downward with respect to the working device via the rocking member.
  • Paddy field work machines may be provided with springs that urge the float downwards with respect to the work equipment.
  • the tension spring is connected to the first portion of the swing member and extends rearward from the first portion of the swing member, so that the tension spring can be compactly placed at a relatively low position. Be placed. By arranging the tension spring at a low position, the tension spring has less influence on the arrangement of the height sensor.
  • a set height changing portion capable of changing the set height by changing the support position of the float with respect to the working device up and down is provided, and the setting is performed by operating the set height changing portion.
  • the position of the support shaft core is changed to the lower side with respect to the working device, and as the set height is changed to the lower side, the said It is preferable that an interlocking portion for changing the position of the support shaft core to the higher side with respect to the working device is provided.
  • Some paddy field work machines such as passenger-type rice transplanters are equipped with a set height change unit that can change the set height by changing the support position of the float with respect to the work equipment up and down.
  • the planting depth of the seedlings by the seedling planting device is changed by changing the set height from the float (field surface) to the seedling planting device (working device).
  • the position of the support shaft core of the swing member is changed in the same manner as the support position of the float, so that the set height is changed. Even if the height is changed, there is little change in the vertical positional relationship between the float and the support shaft core of the swing member.
  • the height sensor is provided in the work device, when the support position of the float is changed by the set height changing portion, the support shaft core of the float and the swing member and the height sensor , The positional relationship in the vertical direction changes.
  • the connecting member since the connecting member is connected over the input portion of the height sensor and the second portion of the swing member, as described above, the support shaft core of the float and the swing member and the height sensor are connected. Even if the vertical positional relationship with the height sensor changes, the connecting member swings around the connection point with the second part of the swinging member, and the connecting member around the connecting point with the input portion of the height sensor. By swinging to, the above-mentioned change in the positional relationship in the vertical direction is absorbed. As a result, even if the support position of the float is changed by the set height change part, the lift operation of the float with respect to the work device is appropriately transmitted to the height sensor, and the work height from the float to the work device is the height sensor. Is properly detected by.
  • the spring support portion is provided on the rear side with respect to the swing member, and the tension spring is connected to the first portion and the spring support portion by the urging force of the tension spring.
  • the float is urged downward with respect to the working device via the swing member, and the position of the spring support portion is changed along the front-rear direction by the operation of the set height changing portion.
  • a spring interlocking portion for maintaining a constant urging force of the tension spring is provided.
  • Paddy field work machines may be provided with springs that urge the float downwards with respect to the work equipment.
  • the tension spring is connected to the first portion of the swing member and extends rearward from the first portion of the swing member, so that the tension spring can be compactly placed at a relatively low position. Be placed. By arranging the tension spring at a low position, the tension spring has less influence on the arrangement of the height sensor.
  • the spring interlocking portion when the set height is changed by the operation of the set height changing portion and the position of the support shaft core of the swing member to which the tension spring is connected is changed as described above, the spring interlocking portion is used.
  • the position of the spring support portion is changed along the front-rear direction, the change in the front-rear distance between the first portion of the swing member and the spring support portion is suppressed to a small one, and the urging force of the tension spring is maintained constant. ..
  • the float stably follows the ground surface.
  • the support frame is arranged along the left-right direction in the portion of the work device on the rear side of the front end portion of the float, and the work portion that supplies materials to the field surface is connected to the support frame. It is preferable that the height sensor extends to the rear side from the support frame and is provided on the rear side of the support frame in a side view.
  • the support frame is arranged along the left-right direction on the work device, and the work part that supplies materials to the paddy field is connected to the support frame and extends to the rear side to improve the overall rigidity of the work device.
  • the support frame may be located in a portion of the work equipment that is posterior to the front end of the float.
  • the height sensor is provided on the rear side of the support frame in the side view, so that the height sensor is arranged rearward from the machine body, so that mud and water are high. It is advantageous in that it is difficult to adhere to the sensor.
  • the right and left support frames are provided, and the center side end portion on the left and right center side of the work device in the right support frame and the center on the left and right center side of the work device in the left support frame.
  • the side ends are butted at intervals, and the right and left support frames are arranged along the left-right direction, and the right and left support frames are arranged along the front-rear direction.
  • a non-working state arranged side by side in the left-right direction is set, a switching mechanism capable of switching the working device between the working state and the non-working state is provided, and the link mechanism is the working state in a plan view. It is preferable that the support frame is arranged between the right and left central ends of the support frame.
  • the right and left support frames are provided in the work device, and the right and left support frames are arranged along the left-right direction with the right and left support frames abutted, and the right and left support frames are front and rear.
  • Some are configured to be switchable to a non-working state in which they are arranged side by side in the left-right direction in a posture along the direction. Since the width of the working device is reduced in the non-working state of the working device, it is advantageous for transporting and storing the paddy field working machine.
  • the central end of the right support frame and the central end of the left support frame are configured to be butted at a distance from each other. Space is secured near the center of the left and right.
  • the link mechanism is arranged between the center side ends of the right and left support frames in the working state of the work device in a plan view, so that the link mechanism cannot be placed near the left and right center parts of the work device. It is easy to connect the float near the center of the left and right sides of the work equipment and the link mechanism, and the work height is detected based on the float near the center of the left and right sides of the work equipment. Easy to obtain.
  • the support member is attached to the central end of the support frame on either the right or left side, and the height sensor and the link mechanism are supported by the support member. ..
  • the link mechanism when the link mechanism is configured to be arranged between the central end portions of the right and left support frames in the working state of the working apparatus in a plan view as described above, the right and left By supporting the height sensor and the link mechanism on the support member attached to the central end of one of the support frames, the positions of the height sensor and the link mechanism are stabilized.
  • the support frame in the non-working state, is arranged so that the central end portion of the support frame is arranged on the rear side with respect to the opposite end portion of the central side end portion of the support frame. Is preferably arranged in a posture along the front-back direction.
  • the central end of the support frame is located on the rear side (opposite the rear part of the machine body), and the operator is not affected by the machine body. Maintenance work for the height sensor and link mechanism can be performed.
  • FIGS. 1 to 10 show a 10-row planting type passenger-type rice transplanter, which is an example of a paddy field work machine.
  • F indicates a forward direction
  • B indicates a backward direction
  • U indicates an upward direction
  • D indicates a downward direction
  • R indicates a right direction
  • L indicates a left direction. ..
  • the passenger-type rice transplanter moves the link mechanism 3 and the link mechanism 3 up and down to the rear part of the machine body 30 provided with the right and left front wheels 1 and the right and left rear wheels 2.
  • a hydraulic cylinder 4 (corresponding to an elevating mechanism) is provided, and a seedling planting device 5 (corresponding to a working device) is supported at the rear of the link mechanism 3.
  • the seedling planting device 5 for planting seedlings (corresponding to materials) on the rice field G is supported so as to be able to move up and down at the rear part of the machine body 30, and the seedling planting device 5 moves up and down with respect to the machine body 30 by the hydraulic cylinder 4. It is ready for operation.
  • FIGS. 1 and 2 (Overall configuration of seedling planting device, fertilizer application device and chemical spraying device) As shown in FIGS. 1 and 2, five planting transmission cases 6 (corresponding to a working part) arranged at predetermined intervals in the left-right direction on the seedling planting device 5, and the right side of the planting transmission case 6.
  • Rotating case 7 rotatably supported on the left and right parts, planting arms 8 supported on both ends of the rotating case 7, 1 center float 9 (corresponding to a float), 4 floats 10, and a seedling stand 11 and the like are provided.
  • the fertilizer application device 12 is supported over the rear part of the machine body 30 and the seedling planting device 5, and the fertilizer application device 12 is provided with a hopper 13, a feeding portion 14, a blower 15, a groove making device 16, a hose 17, and the like. There is.
  • the driver's seat 18 is supported at the rear of the aircraft 30.
  • a hopper 13 for storing fertilizer and a feeding portion 14 are provided in a portion on the rear side of the driver's seat 18 in the machine body 30, and a blower 15 is provided on the left lateral side of the feeding portion 14. .
  • a grooving device 16 is attached to the center float 9 and the float 10, and a hose 17 is connected to the feeding portion 14 and the grooving device 16.
  • the planting arm 8 (rotary case 7) is rotationally driven while the seedling stand 11 is laterally driven, and the planting arm 8 takes out the seedlings from the lower part of the seedling stand 11. It is planted (supplied) on the rice field G.
  • the fertilizer of the hopper 13 is fed out by the feeding portion 14, and is supplied to the groove making device 16 through the hose 17 by the transport air of the blower 15. While being formed, fertilizer is supplied from the groove making device 16 to the groove of the field surface G.
  • the drug spraying device 28 is supported by the support frame 29 connected to the central planting transmission case 6. From the chemical spraying device 28, a chemical such as a herbicide is sprayed on the rice field G behind the seedling planting device 5.
  • a frame-shaped support frame 19 is provided when viewed from the front. Brackets connected to the right and left vertical portions 19c and lower portions 19b connected to the support frame 19 over the upper portion 19a and the lower portion 19b, the upper portion 19a and the lower portion 19b arranged along the left-right direction. 19d and the like are provided.
  • the bracket 19d of the support frame 19 is rotatably supported around the axis P3 along the front-rear direction by the vertical link 3a (see FIG. 1) at the rear of the link mechanism 3.
  • the right and left support arms 20 (corresponding to the switching mechanism) can swing around the axis P1 along the vertical direction, so that the upper portion 19a and the lower portion of the support frame 19 can swing. It is held in the right and left parts of 19b.
  • right and left support frames 21 and 22 are provided, and the connecting portion 23 is connected to the right and left support frames 21 and 22.
  • the connecting portion 23 of the right support frame 21 is supported by the end portion of the right support arm 20 so as to be swingable around the axis P2 along the vertical direction.
  • the connecting portion 23 of the left support frame 22 is supported by the end portion of the left support arm 20 so as to be swingable around the axis P2 along the vertical direction.
  • Three planting transmission cases 6 are connected to the right support frame 21 and extend rearward from the right support frame 21, and the center float 9 and the two floats 10 are connected to the right support frame 21. Is supported by.
  • Two planting transmission cases 6 are connected to the left support frame 22 and extend rearward from the left support frame 22, and two floats 10 are supported by the left support frame 22. There is.
  • the right and left support frames 21 and 22 are the front end portions 9a and 10a of the center float 9 and the float 10 in the side view and the plan view. It is arranged along the left-right direction in the rear part.
  • the states shown in FIGS. 1, 2 and 3 are the left end of the right support frame 21, the center side end 21a of the left and right center side of the seedling planting device 5, and the right end of the left support frame 22. It is a working state A1 in which the center side end portions 22a on the left and right center side of the attachment device 5 are butted at intervals, and the right and left support frames 21 and 22 are arranged along the left and right directions.
  • the operation of switching from the working state A1 to the non-working state A2 in the seedling planting device 5 is performed as described below.
  • the seedling stand 11 is separated at the boundary between the right portion 11a of the 6th row and the left portion 11b of the 4th row.
  • the left portion 11b belongs to the left support frame 22.
  • the right support frame 21 is swung around the axis P2 in the counterclockwise direction of FIG. 3, and the left support frame 22 is swung around the axis P2 in the clockwise direction of FIG.
  • the left support arm 20 is swung backward around the axis P1.
  • the right and left support frames 21 and 22 are arranged side by side in the left-right direction in a posture along the front-rear direction.
  • the working state A2 is set.
  • the central side ends 21a and 22a of the support frames 21 and 22 are attached to the opposite ends 21b and 22b of the central side ends 21a and 22a of the support frames 21 and 22.
  • the support frames 21 and 22 are arranged in a posture along the front-rear direction so as to be arranged on the rear side.
  • right and left fulcrum frames 25 and 26 are provided.
  • the right fulcrum frame 25 is rotatably supported around the axis P4 along the left-right direction under the three planting transmission cases 6 connected to the right support frame 21.
  • the left fulcrum frame 26 is rotatably supported around the axis P4 along the left-right direction under the two planting transmission cases 6 connected to the left support frame 22.
  • the occlusal portion 24 is connected to the left end of the right fulcrum frame 25, and the occlusal portion 24 is connected to the right end of the left fulcrum frame 26.
  • the occlusal portions 24 of the right and left fulcrum frames 25 and 26 are occluded, and the right and left fulcrum frames 26 are in a state where they can rotate integrally.
  • the float arms 25a and 26a are connected to the fulcrum frames 25 and 26 and extend to the rear side, and the rear portions of the center float 9 and the float 10 can swing up and down around the axis P5 along the left-right direction. It is supported by the rear parts of the float arms 25a and 26a. As a result, the center float 9 and the float 10 are supported on the lower part of the seedling planting device 5 so as to be able to move up and down so as to follow the ground surface G on the ground.
  • a fan-shaped operation gear 27 swings around the axis P6 along the front-rear direction on the upper part of the portion belonging to the left support frame 22.
  • a gear mechanism 31 having a pinion gear 31a that meshes with the operation gear 27 and an electric motor 32 (corresponding to a set height changing portion) that drives the gear mechanism 31 are provided.
  • the linking rod 35 is connected to the occlusal portion 24 of the left support frame 22 and the operation gear 27.
  • a dial switch type set height operating tool 33 (corresponding to a set height changing portion) is provided in the vicinity of the steering handle 34 for steering the front wheel 1.
  • the operating position of the set height operating tool 33 is input to the control device 40 (corresponding to the control unit) provided on the machine body 30.
  • the electric motor 32 is operated by the control device 40 based on the operating position of the set height operating tool 33.
  • the operation is operated, the operation gear 27 is swung up and down, and the fulcrum frames 25 and 26 are rotated around the axis P4 via the linking rod 35.
  • the fulcrum frames 25 and 26 By rotating the fulcrum frames 25 and 26, the positions of the float arms 25a and 26a of the fulcrum frames 25 and 26 are changed up and down, and the positions of the shaft core P5 are changed up and down.
  • the set height H1 from the center float 9 and the float 10 (field G) to the seedling planting device 5 (planting transmission case 6) is set for the center float 9 and the float 10 that follow the ground surface G on the ground.
  • the support position (position of the shaft core P5) of the center float 9 (float 10) with respect to the seedling planting device 5 (planting transmission case 6) is moved up and down.
  • the set height H1 is changed to.
  • the support member 36 is connected to the central end portion 21a of the right support frame 21.
  • a potentiometer-type height sensor 38 is supported by a bracket 37 connected to the support member 36, and the arm-shaped input portion 38a of the height sensor 38 can swing around the axis P7 along the left-right direction. It is provided on the height sensor 38 and extends downward from the height sensor 38.
  • the height sensor 38 is provided in the portion of the seedling planting device 5 behind the front end portions 9a and 10a of the center float 9 and the float 10, and the right and left support frames are provided.
  • a height sensor 38 is provided on the rear side of 21 and 22.
  • the height sensor 38 is arranged above the fulcrum frame 25 in a side view, and is arranged at substantially the same height as the upper surface portion of the planting transmission case 6.
  • the link mechanism 39 is connected to the front portion of the center float 9 and the input portion 38a of the height sensor 38, and the link mechanism 39 is connected to the swing member 41. It has a member 42.
  • the balance-shaped interlocking portion 43 is supported by the support member 36 so as to be swingable around the axis P8 along the left-right direction, and the arm 25b connected to the fulcrum frame 25 and extended to the front side is interlocked. It is connected to the rear portion of the portion 43, and the posture of the interlocking portion 43 is set.
  • a swing member 41 is swingably supported around a shaft core P9 (corresponding to a support shaft core) along the left-right direction of the front portion of the interlocking portion 43, and the swing member 41 is supported via the interlocking portion 43. It is swingably supported by the seedling planting device 5.
  • the swing member 41 is provided with a first portion 41a extending forward from the shaft core P9 and a second portion 41b extending upward from the shaft core P9, and the front portion of the first portion 41a. Is connected to the front portion of the center float 9 via the link member 44.
  • the connecting member 42 is arranged along the front-rear direction, the front portion of the connecting member 42 and the upper portion of the second portion 41b of the swing member 41 are connected, and the rear portion of the connecting member 42 and the input of the height sensor 38 are connected.
  • the lower part of the portion 38a is connected, and the connecting member 42 is connected to the input portion 38a of the height sensor 38 and the second portion 41b of the rocking member 41.
  • a balance-shaped spring support portion 46 is swingably supported around the axis P10 along the left-right direction by a bracket 45 connected to the rear portion of the support member 36.
  • the spring support portion 46 is provided on the rear side of the swing member 41 of the link mechanism 39.
  • the arm 25c (corresponding to the spring interlocking portion) connected to the fulcrum frame 25 and extended to the rear side is connected to the front portion of the spring support portion 46, and the posture of the spring support portion 46 is set.
  • a coil spring-shaped tension spring 47 is connected to the lower portion of the first portion 41a of the swing member 41 and the rear portion of the spring support portion 46.
  • the tension spring 47 is arranged at a lower position on the lower side with respect to the swing member 41, the interlocking portion 43, and the fulcrum frame 25 along the front-rear direction.
  • the urging force of the tension spring 47 urges the rocking member 41 in the counterclockwise direction of FIGS. 8 and 9, and the center float 9 passes through the rocking member 41 and the link member 44 to the seedling planting device 5 ( It is urged downward with respect to the planting transmission case 6), and the center float 9 follows the ground surface G on the ground.
  • the link mechanism 39, the height sensor 38, and the tension spring 47 are arranged between the central end portions 21a and 22a of the right and left support frames 21 and 22 in a plan view.
  • the center float 9 is arranged below between the central end portions 21a and 22a of the right and left support frames 21 and 22 in plan view and side view.
  • the central side end portions 21a, 22a of the right and left support frames 21 and 22 are the central side end portions 21a of the support frames 21 and 22.
  • the right and left support frames 21 and 22 are arranged in a posture along the front-rear direction so as to be arranged on the rear side with respect to the opposite ends 21b and 22b of 22a.
  • the height sensor 38, the link mechanism 39, and the tension spring 47 are supported by the support member 36 connected to the central end portion 21a of the right support frame 21.
  • the center side ends 21a and 22a of the right and left support frames 21 and 22 are located on the rear side (opposite side of the rear part of the machine body 30), and the height is high.
  • the sensor 38, the link mechanism 39, the tension spring 47, and the center float 9 are located on the rear side (opposite the rear side of the machine body 30).
  • a control valve 48 is provided in the hydraulic cylinder 4 to operate the hydraulic cylinder 4 by supplying and discharging hydraulic oil, and the control valve 48 is operated by the control device 40 as described below. Cylinder.
  • the seedling planting device 5 (planting transmission case 6) moves up and down with respect to the center float 9 that follows the ground surface G on the ground, and the seedling planting device 5 (planting transmission case 6) is operated from the center float 9 (field surface G).
  • the swing member 41 swings around the axis P9 in the link mechanism 39, and the connecting member 42 moves back and forth to move the seedling planting device 5 (planting).
  • the raising and lowering operation of the center float 9 with respect to the transmission case 6) is transmitted to the input portion 38a of the height sensor 38.
  • the working height H2 from the center float 9 (field surface G) to the seedling planting device 5 (planting transmission case 6) is detected by the height sensor 38, and the working height detected by the height sensor 38. H2 is input to the control device 40.
  • the control device 40 operates the control valve 48 and operates the hydraulic cylinder 4 so that the working height H2 detected by the height sensor 38 becomes a preset value, and the seedling planting device 5 (planting transmission case 6) is moved up and down with respect to the machine body 30.
  • the set value is a value set substantially in the center of the detection range of the height sensor 38, is a value fixed to the height sensor 38, and corresponds to the set height H1.
  • the seedling planting device 5 (planting transmission case 6) is moved up and down so that the working height H2 detected by the height sensor 38 becomes the set value (set height H1). 5 (planting transmission case 6) is maintained at the set height H1 from the field surface G.
  • the rotary case 7 and the planting arm 8 are rotationally driven in a constant locus, so that the seedling planting device 5 (planting transmission case 6) is maintained at the set height H1 from the rice field surface G.
  • the planting depth of the seedlings by the planting arm 8 is maintained at the set planting depth.
  • the set height H1 corresponds to the set planting depth.
  • the state shown in FIG. 8 is an intermediate state in which the set height H1 (set planting depth) is set between the minimum height (deepest) and the maximum height (shallowest).
  • the state shown in FIG. 9 is a state in which the fulcrum frames 25 and 26 are rotated counterclockwise in FIG. 8 and the set height H1 (set planting depth) is set to the minimum height (maximum depth). ..
  • the state shown in FIG. 10 is a state in which the fulcrum frames 25 and 26 are rotated in the clockwise direction of FIG. 8 and the set height H1 (set planting depth) is set to the maximum height (shallowest). ..
  • the height sensor 38 is provided in the seedling planting device 5 (planting transmission case 6), when the set height H1 (set planting depth) is changed as described above, The positional relationship in the vertical direction changes between the axis P9 of the center float 9 and the swing member 41 and the height sensor 38.
  • the connecting member 42 is connected to the input portion 38a of the height sensor 38 and the second portion 41b of the swinging member 41, the shafts of the center float 9 and the swinging member 41 are as described above. Even if the vertical positional relationship between the core P9 and the height sensor 38 changes, the connecting member 42 swings around the connection point with the second portion 4b of the swinging member 41, and the connecting member 42 By swinging around the connection point of the height sensor 38 with the input portion 38a, the above-mentioned change in the positional relationship in the vertical direction is absorbed.
  • the posture corresponding to the set value of the input unit 38a of the height sensor 38 does not change, and even if the set height H1 (set planting depth) is changed, the changed set height H1 (setting) is changed.
  • the planting depth) corresponds to the set value of the height sensor 38.
  • the height sensor 38 By making the changed set height H1 (set planting depth) correspond to the set value of the height sensor 38, as described in the above-mentioned (elevation control of the seedling planting device), the height sensor 38
  • the seedling planting device 5 (planting transmission case 6) is changed by raising and lowering the seedling planting device 5 (planting transmission case 6) so that the detected work height H2 becomes the set value.
  • the set height is maintained at H1 (the planting depth of seedlings is maintained at the changed set planting depth).
  • the working height H2 detected by the height sensor 38 and added or subtracted is changed to the changed set height H1 (set planting depth). It can be considered that the raising and lowering operation of the seedling planting device 5 (planting transmission case 6) is performed so as to have the depth).
  • the input portion 38a of the height sensor 38 may be configured to extend upward from the height sensor 38.
  • a planting depth lever (not shown) is connected to the fulcrum frames 25 and 26, and the driver operates the planting depth lever to operate the fulcrum frame 25. , 26 may be rotated to change the set height H1.
  • the seedling planting device 5 may be configured as an 8-row planting type, a 6-row planting type, a 5-row planting type, or a 4-row planting type.
  • the right and left support frames 21 and 22 may be abolished and one support frame (not shown) may be arranged along the left-right direction.
  • a ground leveling device (not shown) that leveles the field surface G by being rotationally driven around the axis along the left-right direction is configured to be supported on the front side with respect to the right and left support frames 21 and 22. You may.
  • the leveling device corresponds to the portion corresponding to the support frame 19, the portion corresponding to the right support frame 21, and the left support frame 22.
  • the portions corresponding to the right and left support frames 21 and 22 of the leveling device may be configured to move together with the right and left support frames 21 and 22.
  • the present invention is not limited to a passenger-type rice transplanter, but also a passenger-type direct sowing machine in which a seeding device (corresponding to a working device) for supplying seeds (corresponding to a material) to the rice transplanter G is supported at the rear of the machine body 30, and a chemical agent to the rice transplanter G. It can also be applied to a passenger-type management machine in which a drug supply device for supplying (corresponding to a material) is supported at the rear of the machine body 30.

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  • 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)

Abstract

This paddy field work machine, on which a work device is supported on the rear of the machine body, makes mud or water scattering rearward from the machine body less likely to adhere to a height sensor. The paddy field work machine comprises: a lifting mechanism which can perform a lift operation on the work device relative to the machine body; a float 9 which is liftably supported on the lower part of the work device and tracks on the ground of a paddy field G; and a height sensor 38 provided on a portion of the work device rearward of a front end 9a of the float 9 in a plan view. A link mechanism 39 is provided, which is connected across the float 9 and the height sensor 38, and which transmits, to the height sensor 38, the lifting operation of the float 9 relative to the work device such that the height sensor 38 detects a work height H2 from the float 9 to the work device. A control unit is provided which actuates the lifting mechanism such that the work height H2 becomes a set height H1 on the basis of a detected value of the height sensor 38.

Description

水田作業機Paddy field 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、機体の後部の作業装置の昇降操作の構成に関する。 The present invention relates to a configuration for raising and lowering a working device at the rear of the machine in a paddy field working machine such as a riding type rice transplanter or 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、田面に接地追従するフロートが作業装置の下部に昇降可能に支持され、高さセンサーが作業装置に取り付けられて、フロートと高さセンサーとに亘ってロッドが接続されている。
　これにより、フロート（田面）から作業装置までの作業高さが、高さセンサーにより検出され、作業高さが、事前に設定された設定高さとなるように、作業装置が昇降操作される。 In a passenger-type rice transplanter, which is an example of a paddy field work machine, as disclosed in Patent Document 1, a float that follows the ground surface of the rice field is supported so as to be able to move up and down at the lower part of the work device, and a height sensor is attached to the work device. The rod is connected across the float and the height sensor.
As a result, the working height from the float (field surface) to the working device is detected by the height sensor, and the working device is moved up and down so that the working height becomes a preset height.
特開２０１３－５９２６７号公報Japanese Unexamined Patent Publication No. 2013-59267
　水田作業機では、走行に伴って機体から後方に泥や水が飛ばされるので、後方に飛ばされた泥や水が高さセンサーに付着し難いようにするという面で、改善の余地がある。
　本発明は、機体の後部に作業装置が支持された水田作業機において、機体から後方に飛ばされた泥や水が高さセンサーに付着し難いようにすることを目的としている。 In the paddy field work machine, mud and water are blown backward from the machine as it travels, so there is room for improvement in terms of making it difficult for the mud and water blown backward to adhere to the height sensor.
An object of the present invention is to prevent mud and water blown backward from the machine body from adhering to the height sensor in a paddy field work machine in which a work device is supported at the rear part of the machine body.
　本発明の水田作業機は、機体の後部に昇降可能に支持され、田面に資材を供給する作業装置と、前記機体に対して前記作業装置を昇降操作可能な昇降機構と、前記作業装置の下部に昇降可能に支持され、田面に接地追従するフロートと、側面視で、前記作業装置における前記フロートの前端部よりも後側の部分に設けられた高さセンサーと、前記フロートと前記高さセンサーとに亘って接続され、前記高さセンサーが前記フロートから前記作業装置までの作業高さを検出するように、前記作業装置に対する前記フロートの昇降作動を前記高さセンサーに伝達するリンク機構と、前記高さセンサーの検出値に基づいて、前記作業高さが、事前に設定された設定高さとなるように、前記昇降機構を作動させる制御部とが備えられている。 The paddy field working machine of the present invention is supported by the rear part of the machine body so as to be able to move up and down, and supplies materials to the rice field surface. A float that is supported up and down and follows the ground surface, a height sensor provided in a portion of the work equipment behind the front end of the float, and the float and the height sensor. A link mechanism that transmits the lifting operation of the float to the working device to the height sensor so that the height sensor detects the working height from the float to the working device. A control unit for operating the elevating mechanism is provided so that the working height becomes a preset height based on the detection value of the height sensor.
　本発明によると、機体の後部の作業装置に、フロート及び高さセンサーが設けられて、フロートと高さセンサーとに亘ってリンク機構が接続された状態において、高さセンサーが、フロートの前端部よりも後側に配置されており、機体から後方に離れて配置されている。
　これにより、機体から後方に泥や水が飛ばされても、泥や水が高さセンサーに付着し難くなるのであり、泥や水の付着による高さセンサーの耐久性の低下を防止することができる。 According to the present invention, a float and a height sensor are provided in a working device at the rear of the machine, and a height sensor is a front end of the float in a state where a link mechanism is connected between the float and the height sensor. It is located behind the aircraft and away from the aircraft.
This makes it difficult for mud and water to adhere to the height sensor even if mud and water are blown backward from the aircraft, and it is possible to prevent the durability of the height sensor from decreasing due to the adhesion of mud and water. can.
　本発明において、前記リンク機構は、左右方向に沿った支持軸芯周りに揺動可能に前記作業装置に支持され、前記支持軸芯から前側に延出されて前記フロートに接続された第１部分が設けられ、前記支持軸芯から上側に延出された第２部分が設けられた揺動部材と、前後方向に沿って配置され、前記高さセンサーの入力部と前記第２部分とに亘って接続された接続部材とを有していると好適である。 In the present invention, the link mechanism is supported by the working device so as to be swingable around the support shaft core along the left-right direction, extends forward from the support shaft core, and is connected to the float. Is provided, and a swing member provided with a second portion extending upward from the support shaft core, and arranged along the front-rear direction, extending over the input portion of the height sensor and the second portion. It is preferable to have a connecting member connected to the vehicle.
　本発明によると、フロートと高さセンサーとに亘って接続されるリンク機構に、揺動部材と接続部材とが設けられている。田面に接地追従するフロートに対して作業装置の作業高さが変化すると、これに伴ってリンク機構の揺動部材が支持軸芯周りに揺動し、接続部材が前後動して、作業装置に対するフロートの昇降作動が高さセンサーに伝達されて、フロートから作業装置までの作業高さが高さセンサーにより検出される。 According to the present invention, a swing member and a connecting member are provided in a link mechanism connected to the float and the height sensor. When the working height of the work device changes with respect to the float that follows the ground surface, the swing member of the link mechanism swings around the support axis, and the connection member moves back and forth with respect to the work device. The lifting operation of the float is transmitted to the height sensor, and the working height from the float to the working device is detected by the height sensor.
　本発明によると、揺動部材に、支持軸芯から上方に延出された第２部分が設けられ、前後方向に沿った接続部材が、高さセンサーの入力部と揺動部材の第２部分とに亘って接続されている。揺動部材の第２部分により、高さセンサーがフロート（田面）から比較的高い位置に配置されるのであり、泥や水が高さセンサーに付着し難くなるという面で有利になる。 According to the present invention, the swing member is provided with a second portion extending upward from the support shaft core, and the connecting member along the front-rear direction is the input portion of the height sensor and the second portion of the swing member. It is connected over and over. The second portion of the rocking member arranges the height sensor at a relatively high position from the float (field surface), which is advantageous in that mud and water are less likely to adhere to the height sensor.
　本発明において、前記入力部が前記高さセンサーから下側に延出され、前記入力部の下部と前記接続部材の後部とが接続されていると好適である。 In the present invention, it is preferable that the input portion extends downward from the height sensor, and the lower portion of the input portion and the rear portion of the connecting member are connected to each other.
　本発明によると、高さセンサーの入力部と揺動部材の第２部分とに亘って接続部材が接続される場合、高さセンサーの入力部が、高さセンサーから下側に延出されている。
　これにより、高さセンサーの入力部が下側に延出される分だけ、高さセンサーの位置が揺動部材に対して高くなるので、高さセンサーがフロート（田面）から比較的高い位置に配置されることにより、泥や水が高さセンサーに付着し難くなるという面で有利になる。 According to the present invention, when the connecting member is connected over the input portion of the height sensor and the second portion of the rocking member, the input portion of the height sensor extends downward from the height sensor. There is.
As a result, the position of the height sensor is higher than the swing member by the amount that the input part of the height sensor extends downward, so the height sensor is placed at a relatively high position from the float (field surface). This is advantageous in that mud and water are less likely to adhere to the height sensor.
　本発明において、バネ支持部が、前記揺動部材に対して後側に設けられ、引っ張りバネが、前記第１部分と前記バネ支持部とに亘って接続されて、前記引っ張りバネの付勢力により、前記フロートが前記揺動部材を介して前記作業装置に対して下側に付勢されていると好適である。 In the present invention, the spring support portion is provided on the rear side with respect to the swing member, and the tension spring is connected to the first portion and the spring support portion by the urging force of the tension spring. It is preferable that the float is urged downward with respect to the working device via the rocking member.
　水田作業機では、フロートを作業装置に対して下側に付勢するバネが設けられることがある。
　本発明によると、引っ張りバネが、揺動部材の第１部分に接続されて、揺動部材の第１部分から後側に延出される状態となるので、引っ張りバネが比較的低い位置にコンパクトに配置される。引っ張りバネが低い位置に配置されることにより、引っ張りバネが高さセンサーの配置に影響を及ぼすことは少ない。 Paddy field work machines may be provided with springs that urge the float downwards with respect to the work equipment.
According to the present invention, the tension spring is connected to the first portion of the swing member and extends rearward from the first portion of the swing member, so that the tension spring can be compactly placed at a relatively low position. Be placed. By arranging the tension spring at a low position, the tension spring has less influence on the arrangement of the height sensor.
　本発明において、前記作業装置に対する前記フロートの支持位置を上下に変更することにより、前記設定高さを変更可能な設定高さ変更部が備えられ、前記設定高さ変更部の作動により、前記設定高さが高側に変更されるのに伴って、前記支持軸芯の位置を前記作業装置に対して低側に変更し、前記設定高さが低側に変更されるのに伴って、前記支持軸芯の位置を前記作業装置に対して高側に変更する連動部が備えられていると好適である。 In the present invention, a set height changing portion capable of changing the set height by changing the support position of the float with respect to the working device up and down is provided, and the setting is performed by operating the set height changing portion. As the height is changed to the higher side, the position of the support shaft core is changed to the lower side with respect to the working device, and as the set height is changed to the lower side, the said It is preferable that an interlocking portion for changing the position of the support shaft core to the higher side with respect to the working device is provided.
　乗用型田植機等の水田作業機では、作業装置に対するフロートの支持位置を上下に変更することにより、設定高さを変更可能な設定高さ変更部が備えられたものがある。乗用型田植機では、フロート（田面）から苗植付装置（作業装置）までの設定高さが変更されることにより、苗植付装置による苗の植付深さが変更される。 Some paddy field work machines such as passenger-type rice transplanters are equipped with a set height change unit that can change the set height by changing the support position of the float with respect to the work equipment up and down. In the passenger-type rice transplanter, the planting depth of the seedlings by the seedling planting device is changed by changing the set height from the float (field surface) to the seedling planting device (working device).
　本発明によると、設定高さ変更部の作動により設定高さが変更されるのに伴って、揺動部材の支持軸芯の位置が、フロートの支持位置と同様に変更されるので、設定高さが変更されても、フロートと揺動部材の支持軸芯の上下方向の位置関係に変化は少ない。
　これに対して、高さセンサーは作業装置に設けられているので、設定高さ変更部によりフロートの支持位置が変更されると、フロート及び揺動部材の支持軸芯と、高さセンサーとにおいて、上下方向の位置関係は変化する。 According to the present invention, as the set height is changed by the operation of the set height changing portion, the position of the support shaft core of the swing member is changed in the same manner as the support position of the float, so that the set height is changed. Even if the height is changed, there is little change in the vertical positional relationship between the float and the support shaft core of the swing member.
On the other hand, since the height sensor is provided in the work device, when the support position of the float is changed by the set height changing portion, the support shaft core of the float and the swing member and the height sensor , The positional relationship in the vertical direction changes.
　本発明によると、高さセンサーの入力部と揺動部材の第２部分とに亘って接続部材が接続されているので、前述のように、フロート及び揺動部材の支持軸芯と高さセンサーとの上下方向の位置関係が変化しても、接続部材が揺動部材の第２部分との接続点周りに揺動すること、並びに、接続部材が高さセンサーの入力部との接続点周りに揺動することにより、前述の上下方向の位置関係の変化が吸収される。
　これにより、設定高さ変更部によりフロートの支持位置が変更されても、作業装置に対するフロートの昇降作動が高さセンサーに適切に伝達されて、フロートから作業装置までの作業高さが高さセンサーにより適切に検出される。 According to the present invention, since the connecting member is connected over the input portion of the height sensor and the second portion of the swing member, as described above, the support shaft core of the float and the swing member and the height sensor are connected. Even if the vertical positional relationship with the height sensor changes, the connecting member swings around the connection point with the second part of the swinging member, and the connecting member around the connecting point with the input portion of the height sensor. By swinging to, the above-mentioned change in the positional relationship in the vertical direction is absorbed.
As a result, even if the support position of the float is changed by the set height change part, the lift operation of the float with respect to the work device is appropriately transmitted to the height sensor, and the work height from the float to the work device is the height sensor. Is properly detected by.
　本発明において、バネ支持部が、前記揺動部材に対して後側に設けられ、引っ張りバネが、前記第１部分と前記バネ支持部とに亘って接続されて、前記引っ張りバネの付勢力により、前記フロートが前記揺動部材を介して前記作業装置に対して下側に付勢され、前記設定高さ変更部の作動により、前記バネ支持部の位置を前後方向に沿って変更して、前記引っ張りバネの付勢力を一定に維持するバネ連動部が備えられていると好適である。 In the present invention, the spring support portion is provided on the rear side with respect to the swing member, and the tension spring is connected to the first portion and the spring support portion by the urging force of the tension spring. The float is urged downward with respect to the working device via the swing member, and the position of the spring support portion is changed along the front-rear direction by the operation of the set height changing portion. It is preferable that a spring interlocking portion for maintaining a constant urging force of the tension spring is provided.
　水田作業機では、フロートを作業装置に対して下側に付勢するバネが設けられることがある。
　本発明によると、引っ張りバネが、揺動部材の第１部分に接続されて、揺動部材の第１部分から後側に延出される状態となるので、引っ張りバネが比較的低い位置にコンパクトに配置される。引っ張りバネが低い位置に配置されることにより、引っ張りバネが高さセンサーの配置に影響を及ぼすことは少ない。 Paddy field work machines may be provided with springs that urge the float downwards with respect to the work equipment.
According to the present invention, the tension spring is connected to the first portion of the swing member and extends rearward from the first portion of the swing member, so that the tension spring can be compactly placed at a relatively low position. Be placed. By arranging the tension spring at a low position, the tension spring has less influence on the arrangement of the height sensor.
　本発明によると、前述のように設定高さ変更部の作動により設定高さが変更されて、引っ張りバネが接続される揺動部材の支持軸芯の位置が変更された場合、バネ連動部によりバネ支持部の位置が前後方向に沿って変更され、揺動部材の第１部分とバネ支持部との前後間隔の変化が小さいものに抑えられて、引っ張りバネの付勢力が一定に維持される。
　これにより、設定高さが変更されて、フロートの支持位置が上下に変更されても、フロートは田面に安定して接地追従する。 According to the present invention, when the set height is changed by the operation of the set height changing portion and the position of the support shaft core of the swing member to which the tension spring is connected is changed as described above, the spring interlocking portion is used. The position of the spring support portion is changed along the front-rear direction, the change in the front-rear distance between the first portion of the swing member and the spring support portion is suppressed to a small one, and the urging force of the tension spring is maintained constant. ..
As a result, even if the set height is changed and the support position of the float is changed up and down, the float stably follows the ground surface.
　本発明において、支持フレームが、前記作業装置における前記フロートの前端部よりも後側の部分に、左右方向に沿って配置され、田面に資材を供給する作業部が、前記支持フレームに連結されて、前記支持フレームから後側に延出され、前記高さセンサーが、側面視で、前記支持フレームよりも後側に設けられていると好適である。 In the present invention, the support frame is arranged along the left-right direction in the portion of the work device on the rear side of the front end portion of the float, and the work portion that supplies materials to the field surface is connected to the support frame. It is preferable that the height sensor extends to the rear side from the support frame and is provided on the rear side of the support frame in a side view.
　水田作業機では、支持フレームが作業装置に左右方向に沿って配置され、田面に資材を供給する作業部が支持フレームに連結され後側に延出されて、作業装置の全体の剛性を向上させるように構成されたものがある。この構成において、支持フレームが作業装置におけるフロートの前端部よりも後側の部分に配置されることがある。 In the paddy field work machine, the support frame is arranged along the left-right direction on the work device, and the work part that supplies materials to the paddy field is connected to the support frame and extends to the rear side to improve the overall rigidity of the work device. There is something configured like this. In this configuration, the support frame may be located in a portion of the work equipment that is posterior to the front end of the float.
　本発明によると、前述の構成において、高さセンサーが側面視で支持フレームよりも後側に設けられることにより、高さセンサーが機体から後方に離れて配置されるので、泥や水が高さセンサーに付着し難くなるという面で有利になる。 According to the present invention, in the above-described configuration, the height sensor is provided on the rear side of the support frame in the side view, so that the height sensor is arranged rearward from the machine body, so that mud and water are high. It is advantageous in that it is difficult to adhere to the sensor.
　本発明において、右及び左の前記支持フレームが設けられ、右の前記支持フレームにおける前記作業装置の左右中央側の中央側端部と、左の前記支持フレームにおける前記作業装置の左右中央側の中央側端部とが、間隔を空けて突き合わされて、右及び左の前記支持フレームが左右方向に沿って配置された作業状態と、右及び左の前記支持フレームが前後方向に沿った姿勢で、左右方向に並んで配置された非作業状態とが設定され、前記作業装置を前記作業状態及び前記非作業状態に切換可能な切換機構が備えられ、前記リンク機構が、平面視で、前記作業状態での右及び左の前記支持フレームの中央側端部の間に配置されていると好適である。 In the present invention, the right and left support frames are provided, and the center side end portion on the left and right center side of the work device in the right support frame and the center on the left and right center side of the work device in the left support frame. The side ends are butted at intervals, and the right and left support frames are arranged along the left-right direction, and the right and left support frames are arranged along the front-rear direction. A non-working state arranged side by side in the left-right direction is set, a switching mechanism capable of switching the working device between the working state and the non-working state is provided, and the link mechanism is the working state in a plan view. It is preferable that the support frame is arranged between the right and left central ends of the support frame.
　水田作業機では、作業装置において右及び左の支持フレームが設けられ、右及び左の支持フレームが突き合わされた状態で左右方向に沿って配置された作業状態と、右及び左の支持フレームが前後方向に沿った姿勢で左右方向に並んで配置された非作業状態とに切換可能に構成されたものがある。作業装置の非作業状態において、作業装置の横幅が小さくなるので、水田作業機の運搬や格納に有利なものとなる。 In the paddy field work machine, the right and left support frames are provided in the work device, and the right and left support frames are arranged along the left-right direction with the right and left support frames abutted, and the right and left support frames are front and rear. Some are configured to be switchable to a non-working state in which they are arranged side by side in the left-right direction in a posture along the direction. Since the width of the working device is reduced in the non-working state of the working device, it is advantageous for transporting and storing the paddy field working machine.
　本発明によると、作業装置の作業状態において、右の支持フレームの中央側端部と左の支持フレームの中央側端部とが、間隔を空けて突き合わされるように構成して、作業装置の左右中央部付近に空間を確保している。 According to the present invention, in the working state of the working device, the central end of the right support frame and the central end of the left support frame are configured to be butted at a distance from each other. Space is secured near the center of the left and right.
　本発明によると、リンク機構が平面視で作業装置の作業状態での右及び左の支持フレームの中央側端部の間に配置されることにより、リンク機構が作業装置の左右中央部付近に無理なく配置され、作業装置の左右中央部付近のフロートとリンク機構とを接続することが、無理なく行われるのであり、作業装置の左右中央部付近のフロートに基づいて作業高さを検出する構成が容易に得られる。 According to the present invention, the link mechanism is arranged between the center side ends of the right and left support frames in the working state of the work device in a plan view, so that the link mechanism cannot be placed near the left and right center parts of the work device. It is easy to connect the float near the center of the left and right sides of the work equipment and the link mechanism, and the work height is detected based on the float near the center of the left and right sides of the work equipment. Easy to obtain.
　本発明において、支持部材が、右及び左のうちの一方の前記支持フレームの中央側端部に取り付けられ、前記高さセンサー及び前記リンク機構が、前記支持部材に支持されていると好適である。 In the present invention, it is preferable that the support member is attached to the central end of the support frame on either the right or left side, and the height sensor and the link mechanism are supported by the support member. ..
　本発明によると、前述のようにリンク機構が平面視で作業装置の作業状態での右及び左の支持フレームの中央側端部の間に配置されるように構成する場合、右及び左のうちの一方の支持フレームの中央側端部に取り付けられた支持部材に、高さセンサー及びリンク機構を支持させることにより、高さセンサー及びリンク機構の位置が安定する。 According to the present invention, when the link mechanism is configured to be arranged between the central end portions of the right and left support frames in the working state of the working apparatus in a plan view as described above, the right and left By supporting the height sensor and the link mechanism on the support member attached to the central end of one of the support frames, the positions of the height sensor and the link mechanism are stabilized.
　本発明において、前記非作業状態は、前記支持フレームの中央側端部が、前記支持フレームにおける中央側端部の反対側の端部に対して、後側に配置されるように、前記支持フレームが前後方向に沿った姿勢に配置されると好適である。 In the present invention, in the non-working state, the support frame is arranged so that the central end portion of the support frame is arranged on the rear side with respect to the opposite end portion of the central side end portion of the support frame. Is preferably arranged in a posture along the front-back direction.
　本発明によると、作業装置を非作業状態に設定すると、支持フレームの中央側端部が後側（機体の後部の反対側）に位置することになり、作業者は機体の影響を受けることなく高さセンサー及びリンク機構のメンテナンス作業を行うことができる。 According to the present invention, when the working device is set to the non-working state, the central end of the support frame is located on the rear side (opposite the rear part of the machine body), and the operator is not affected by the machine body. Maintenance work for the height sensor and link mechanism can be performed.
乗用型田植機の左側面図である。It is a left side view of a passenger-type rice transplanter. 乗用型田植機の平面図である。It is a top view of a passenger-type rice transplanter. 苗植付装置の作業状態での平面図である。It is a top view in the working state of a seedling planting apparatus. 苗植付装置の非作業状態での平面図である。It is a top view of the seedling planting apparatus in a non-working state. 苗植付装置の作業状態でのセンターフロート、高さセンサー及びリンク機構の付近の平面図である。It is a top view near the center float, the height sensor and the link mechanism in the working state of the seedling planting apparatus. 苗植付装置の作業状態でのセンターフロート、高さセンサー及びリンク機構の付近の正面図である。It is a front view of the vicinity of a center float, a height sensor and a link mechanism in a working state of a seedling planting apparatus. センターフロート、高さセンサー及びリンク機構の分解斜視図である。It is an exploded perspective view of a center float, a height sensor and a link mechanism. 苗植付装置の昇降制御の形態を示す概略図である。It is a schematic diagram which shows the form of the elevating control of a seedling planting apparatus. 設定高さ（設定植付深さ）が最低高さ（最深）に設定された状態を示すセンターフロート、高さセンサー及びリンク機構の付近の左側面図である。It is a left side view near the center float, the height sensor and the link mechanism which shows the state which the set height (set planting depth) is set to the minimum height (the deepest). 設定高さ（設定植付深さ）が最高高さ（最浅）に設定された状態を示すセンターフロート、高さセンサー及びリンク機構の付近の左側面図である。It is a left side view near the center float, the height sensor and the link mechanism which shows the state which the set height (the set planting depth) is set to the maximum height (the shallowest).
　図１～図１０に、水田作業機の一例である１０条植え型式の乗用型田植機が示されている。図１～図１０において、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。 FIGS. 1 to 10 show a 10-row planting type passenger-type rice transplanter, which is an example of a paddy field work machine. In FIGS. 1 to 10, F indicates a forward direction, B indicates a backward direction, U indicates an upward direction, D indicates a downward direction, R indicates a right direction, and L indicates a left direction. ..
（乗用型田植機の全体構成）
　図１及び図２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３０の後部に、リンク機構３及びリンク機構３を昇降操作する油圧シリンダ４（昇降機構に相当）が備えられ、リンク機構３の後部に苗植付装置５（作業装置に相当）が支持されている。 (Overall configuration of passenger rice transplanter)
As shown in FIGS. 1 and 2, the passenger-type rice transplanter moves the link mechanism 3 and the link mechanism 3 up and down to the rear part of the machine body 30 provided with the right and left front wheels 1 and the right and left rear wheels 2. A hydraulic cylinder 4 (corresponding to an elevating mechanism) is provided, and a seedling planting device 5 (corresponding to a working device) is supported at the rear of the link mechanism 3.
　以上の構成により、田面Ｇに苗（資材に相当）を植え付ける苗植付装置５が、機体３０の後部に昇降可能に支持され、油圧シリンダ４により苗植付装置５が機体３０に対して昇降操作可能な状態となっている。 With the above configuration, the seedling planting device 5 for planting seedlings (corresponding to materials) on the rice field G is supported so as to be able to move up and down at the rear part of the machine body 30, and the seedling planting device 5 moves up and down with respect to the machine body 30 by the hydraulic cylinder 4. It is ready for operation.
（苗植付装置、施肥装置及び薬剤散布装置の全体構成）
　図１及び図２に示すように、苗植付装置５に、左右方向に所定間隔を置いて配置された５個の植付伝動ケース６（作業部に相当）、植付伝動ケース６の右部及び左部に回転可能に支持された回転ケース７、回転ケース７の両端に支持された植付アーム８、１個のセンターフロート９（フロートに相当）、４個のフロート１０、苗のせ台１１等が設けられている。 (Overall configuration of seedling planting device, fertilizer application device and chemical spraying device)
As shown in FIGS. 1 and 2, five planting transmission cases 6 (corresponding to a working part) arranged at predetermined intervals in the left-right direction on the seedling planting device 5, and the right side of the planting transmission case 6. Rotating case 7 rotatably supported on the left and right parts, planting arms 8 supported on both ends of the rotating case 7, 1 center float 9 (corresponding to a float), 4 floats 10, and a seedling stand 11 and the like are provided.
　機体３０の後部及び苗植付装置５に亘って、施肥装置１２が支持されており、施肥装置１２に、ホッパー１３、繰り出し部１４、ブロア１５、作溝器１６及びホース１７等が設けられている。 The fertilizer application device 12 is supported over the rear part of the machine body 30 and the seedling planting device 5, and the fertilizer application device 12 is provided with a hopper 13, a feeding portion 14, a blower 15, a groove making device 16, a hose 17, and the like. There is.
　運転座席１８が、機体３０の後部に支持されている。施肥装置１２において、機体３０における運転座席１８の後側の部分に、肥料を貯留するホッパー１３及び繰り出し部１４が設けられており、繰り出し部１４の左の横外側にブロア１５が設けられている。センターフロート９及びフロート１０に作溝器１６が取り付けられており、繰り出し部１４と作溝器１６とに亘ってホース１７が接続されている。 The driver's seat 18 is supported at the rear of the aircraft 30. In the fertilizer application device 12, a hopper 13 for storing fertilizer and a feeding portion 14 are provided in a portion on the rear side of the driver's seat 18 in the machine body 30, and a blower 15 is provided on the left lateral side of the feeding portion 14. .. A grooving device 16 is attached to the center float 9 and the float 10, and a hose 17 is connected to the feeding portion 14 and the grooving device 16.
　苗植付装置５において、苗のせ台１１が横送り駆動されながら、植付アーム８（回転ケース７）が回転駆動されるのであり、植付アーム８が苗のせ台１１の下部から苗を取り出して田面Ｇに植え付ける（供給する）。 In the seedling planting device 5, the planting arm 8 (rotary case 7) is rotationally driven while the seedling stand 11 is laterally driven, and the planting arm 8 takes out the seedlings from the lower part of the seedling stand 11. It is planted (supplied) on the rice field G.
　施肥装置１２において、ホッパー１３の肥料が繰り出し部１４により繰り出されて、ブロア１５の搬送風によりホース１７を通って作溝器１６に供給されるのであり、作溝器１６により田面Ｇに溝が形成されながら、作溝器１６から田面Ｇの溝に肥料が供給される。 In the fertilizer application device 12, the fertilizer of the hopper 13 is fed out by the feeding portion 14, and is supplied to the groove making device 16 through the hose 17 by the transport air of the blower 15. While being formed, fertilizer is supplied from the groove making device 16 to the groove of the field surface G.
　中央の植付伝動ケース６に連結された支持フレーム２９に、薬剤散布装置２８が支持されている。薬剤散布装置２８から、除草剤等の薬剤が苗植付装置５の後方の田面Ｇに散布される。 The drug spraying device 28 is supported by the support frame 29 connected to the central planting transmission case 6. From the chemical spraying device 28, a chemical such as a herbicide is sprayed on the rice field G behind the seedling planting device 5.
（苗植付装置における作業状態及び非作業状態へ切り換えの構成）
　図６に示すように、正面視で枠状の支持フレーム１９が設けられている。支持フレーム１９に、左右方向に沿って配置された上部分１９ａ及び下部分１９ｂ、上部分１９ａ及び下部分１９ｂに亘って連結された右及び左の縦部分１９ｃ、下部分１９ｂに連結されたブラケット１９ｄ等が設けられている。支持フレーム１９のブラケット１９ｄが、リンク機構３の後部の縦リンク３ａ（図１参照）に、前後方向に沿った軸芯Ｐ３周りにローリング可能に支持されている。 (Configuration for switching between working and non-working states in the seedling planting device)
As shown in FIG. 6, a frame-shaped support frame 19 is provided when viewed from the front. Brackets connected to the right and left vertical portions 19c and lower portions 19b connected to the support frame 19 over the upper portion 19a and the lower portion 19b, the upper portion 19a and the lower portion 19b arranged along the left-right direction. 19d and the like are provided. The bracket 19d of the support frame 19 is rotatably supported around the axis P3 along the front-rear direction by the vertical link 3a (see FIG. 1) at the rear of the link mechanism 3.
　図３及び図６に示すように、右及び左の支持アーム２０（切換機構に相当）が、上下方向に沿った軸芯Ｐ１周りに揺動可能に、支持フレーム１９の上部分１９ａ及び下部分１９ｂの右部及び左部に持されている。 As shown in FIGS. 3 and 6, the right and left support arms 20 (corresponding to the switching mechanism) can swing around the axis P1 along the vertical direction, so that the upper portion 19a and the lower portion of the support frame 19 can swing. It is held in the right and left parts of 19b.
　図３に示すように、右及び左の支持フレーム２１，２２が設けられており、右及び左の支持フレーム２１，２２に、連結部２３が連結されている。右の支持フレーム２１の連結部２３が、上下方向に沿った軸芯Ｐ２周りに揺動可能に、右の支持アーム２０の端部に支持されている。左の支持フレーム２２の連結部２３が、上下方向に沿った軸芯Ｐ２周りに揺動可能に、左の支持アーム２０の端部に支持されている。 As shown in FIG. 3, right and left support frames 21 and 22 are provided, and the connecting portion 23 is connected to the right and left support frames 21 and 22. The connecting portion 23 of the right support frame 21 is supported by the end portion of the right support arm 20 so as to be swingable around the axis P2 along the vertical direction. The connecting portion 23 of the left support frame 22 is supported by the end portion of the left support arm 20 so as to be swingable around the axis P2 along the vertical direction.
　３個の植付伝動ケース６が、右の支持フレーム２１に連結されて右の支持フレーム２１から後側に延出されており、センターフロート９及び２個のフロート１０が、右の支持フレーム２１に支持されている。２個の植付伝動ケース６が、左の支持フレーム２２に連結されて左の支持フレーム２２から後側に延出されており、２個のフロート１０が、左の支持フレーム２２に支持されている。 Three planting transmission cases 6 are connected to the right support frame 21 and extend rearward from the right support frame 21, and the center float 9 and the two floats 10 are connected to the right support frame 21. Is supported by. Two planting transmission cases 6 are connected to the left support frame 22 and extend rearward from the left support frame 22, and two floats 10 are supported by the left support frame 22. There is.
　図５，８，９，１０に示すように、苗植付装置５において、右及び左の支持フレーム２１，２２が、側面視及び平面視で、センターフロート９及びフロート１０の前端部９ａ，１０ａよりも後側の部分に、左右方向に沿って配置されている。 As shown in FIGS. 5, 8, 9 and 10, in the seedling planting apparatus 5, the right and left support frames 21 and 22 are the front end portions 9a and 10a of the center float 9 and the float 10 in the side view and the plan view. It is arranged along the left-right direction in the rear part.
　図１，２，３に示す状態は、右の支持フレーム２１の左端部である苗植付装置５の左右中央側の中央側端部２１ａと、左の支持フレーム２２の右端部である苗植付装置５の左右中央側の中央側端部２２ａとが、間隔を空けて突き合わされて、右及び左の支持フレーム２１，２２が左右方向に沿って配置された作業状態Ａ１である。 The states shown in FIGS. 1, 2 and 3 are the left end of the right support frame 21, the center side end 21a of the left and right center side of the seedling planting device 5, and the right end of the left support frame 22. It is a working state A1 in which the center side end portions 22a on the left and right center side of the attachment device 5 are butted at intervals, and the right and left support frames 21 and 22 are arranged along the left and right directions.
　苗植付装置５における作業状態Ａ１から非作業状態Ａ２への切換操作は、以下の説明のように行う。
　苗のせ台１１を６条の右部分１１ａと４条の左部分１１ｂとの境界部分で分離するのであり、苗のせ台１１の右部分１１ａは右の支持フレーム２１に属し、苗のせ台１１の左部分１１ｂは左の支持フレーム２２に属する。 The operation of switching from the working state A1 to the non-working state A2 in the seedling planting device 5 is performed as described below.
The seedling stand 11 is separated at the boundary between the right portion 11a of the 6th row and the left portion 11b of the 4th row. The left portion 11b belongs to the left support frame 22.
　次に、右の支持フレーム２１を軸芯Ｐ２周りに図３の反時計方向に揺動させて、左の支持フレーム２２を軸芯Ｐ２周りに図３の時計方向に揺動させながら、右及び左の支持アーム２０を軸芯Ｐ１周りに後方に揺動させる。 Next, the right support frame 21 is swung around the axis P2 in the counterclockwise direction of FIG. 3, and the left support frame 22 is swung around the axis P2 in the clockwise direction of FIG. The left support arm 20 is swung backward around the axis P1.
　これにより、図４に示すように、苗植付装置５において、右及び左の支持フレーム２１，２２が前後方向に沿った姿勢で、左右方向に並んで配置された苗植付装置５の非作業状態Ａ２が設定される。 As a result, as shown in FIG. 4, in the seedling planting device 5, the right and left support frames 21 and 22 are arranged side by side in the left-right direction in a posture along the front-rear direction. The working state A2 is set.
　苗植付装置５の非作業状態Ａ２において、支持フレーム２１，２２の中央側端部２１ａ，２２ａが、支持フレーム２１，２２における中央側端部２１ａ，２２ａの反対側の端部２１ｂ，２２ｂに対して、後側に配置されるように、支持フレーム２１，２２が前後方向に沿った姿勢に配置される。 In the non-working state A2 of the seedling planting device 5, the central side ends 21a and 22a of the support frames 21 and 22 are attached to the opposite ends 21b and 22b of the central side ends 21a and 22a of the support frames 21 and 22. On the other hand, the support frames 21 and 22 are arranged in a posture along the front-rear direction so as to be arranged on the rear side.
（センターフロート及びフロートの支持の構成）
　図５～図８に示すように、右及び左の支点フレーム２５，２６が設けられている。右の支点フレーム２５が、左右方向に沿った軸芯Ｐ４周りに回転可能に、右の支持フレーム２１に連結された３個の植付伝動ケース６の下部に支持されている。左の支点フレーム２６が、左右方向に沿った軸芯Ｐ４周りに回転可能に、左の支持フレーム２２に連結された２個の植付伝動ケース６の下部に支持されている。 (Structure of center float and float support)
As shown in FIGS. 5 to 8, right and left fulcrum frames 25 and 26 are provided. The right fulcrum frame 25 is rotatably supported around the axis P4 along the left-right direction under the three planting transmission cases 6 connected to the right support frame 21. The left fulcrum frame 26 is rotatably supported around the axis P4 along the left-right direction under the two planting transmission cases 6 connected to the left support frame 22.
　右の支点フレーム２５の左端部に咬合部２４が連結され、左の支点フレーム２６の右端部に咬合部２４が連結されている。苗植付装置５の作業状態Ａ１において、右及び左の支点フレーム２５，２６の咬合部２４が咬合して、右及び左の支点フレーム２６が一体で回転可能な状態となる。 The occlusal portion 24 is connected to the left end of the right fulcrum frame 25, and the occlusal portion 24 is connected to the right end of the left fulcrum frame 26. In the working state A1 of the seedling planting device 5, the occlusal portions 24 of the right and left fulcrum frames 25 and 26 are occluded, and the right and left fulcrum frames 26 are in a state where they can rotate integrally.
　フロートアーム２５ａ，２６ａが、支点フレーム２５，２６に連結されて後側に延出されており、センターフロート９及びフロート１０の後部が、左右方向に沿った軸芯Ｐ５周りに上下に揺動可能に、フロートアーム２５ａ，２６ａの後部に支持されている。これにより、センターフロート９及びフロート１０が、田面Ｇに接地追従するように、苗植付装置５の下部に昇降可能に支持されている。 The float arms 25a and 26a are connected to the fulcrum frames 25 and 26 and extend to the rear side, and the rear portions of the center float 9 and the float 10 can swing up and down around the axis P5 along the left-right direction. It is supported by the rear parts of the float arms 25a and 26a. As a result, the center float 9 and the float 10 are supported on the lower part of the seedling planting device 5 so as to be able to move up and down so as to follow the ground surface G on the ground.
（センターフロート（田面）から苗植付装置（植付伝動ケース）までの設定高さの設定）
　図５，６，８に示すように、苗植付装置５において、左の支持フレーム２２に属する部分の上部に、扇型の操作ギヤ２７が、前後方向に沿った軸芯Ｐ６周りに揺動可能に支持されており、操作ギヤ２７に咬合するピニオンギヤ３１ａを有するギヤ機構３１、ギヤ機構３１を駆動する電動モータ３２（設定高さ変更部に相当）が設けられている。左の支持フレーム２２の咬合部２４と操作ギヤ２７とに亘って、連係ロッド３５が接続されている。 (Setting the set height from the center float (field) to the seedling planting device (planting transmission case))
As shown in FIGS. 5, 6 and 8, in the seedling planting device 5, a fan-shaped operation gear 27 swings around the axis P6 along the front-rear direction on the upper part of the portion belonging to the left support frame 22. A gear mechanism 31 having a pinion gear 31a that meshes with the operation gear 27 and an electric motor 32 (corresponding to a set height changing portion) that drives the gear mechanism 31 are provided. The linking rod 35 is connected to the occlusal portion 24 of the left support frame 22 and the operation gear 27.
　図１，２，８に示すように、前輪１を操向操作する操縦ハンドル３４の近傍に、ダイヤルスイッチ型式の設定高さ操作具３３（設定高さ変更部に相当）が設けられており、機体３０に設けられた制御装置４０（制御部に相当）に、設定高さ操作具３３の操作位置が入力されている。 As shown in FIGS. 1, 2 and 8, a dial switch type set height operating tool 33 (corresponding to a set height changing portion) is provided in the vicinity of the steering handle 34 for steering the front wheel 1. The operating position of the set height operating tool 33 is input to the control device 40 (corresponding to the control unit) provided on the machine body 30.
　苗植付装置５の作業状態Ａ１において、機体３０に搭乗する運転者が設定高さ操作具３３を操作すると、設定高さ操作具３３の操作位置に基づいて、制御装置４０により電動モータ３２が作動操作され、操作ギヤ２７が上下に揺動操作され、連係ロッド３５を介して支点フレーム２５，２６が軸芯Ｐ４周りに回転操作される。支点フレーム２５，２６が回転操作されることにより、支点フレーム２５，２６のフロートアーム２５ａ，２６ａの位置が上下に変更され、軸芯Ｐ５の位置が上下に変更される。 In the working state A1 of the seedling planting device 5, when the driver boarding the machine body 30 operates the set height operating tool 33, the electric motor 32 is operated by the control device 40 based on the operating position of the set height operating tool 33. The operation is operated, the operation gear 27 is swung up and down, and the fulcrum frames 25 and 26 are rotated around the axis P4 via the linking rod 35. By rotating the fulcrum frames 25 and 26, the positions of the float arms 25a and 26a of the fulcrum frames 25 and 26 are changed up and down, and the positions of the shaft core P5 are changed up and down.
　これにより、田面Ｇに接地追従するセンターフロート９及びフロート１０に対して、センターフロート９及びフロート１０（田面Ｇ）から苗植付装置５（植付伝動ケース６）までの設定高さＨ１が設定されるのであり、設定高さ操作具３３が操作されることにより、苗植付装置５（植付伝動ケース６）に対するセンターフロート９（フロート１０）の支持位置（軸芯Ｐ５の位置）が上下に変更されて、設定高さＨ１が変更される。 As a result, the set height H1 from the center float 9 and the float 10 (field G) to the seedling planting device 5 (planting transmission case 6) is set for the center float 9 and the float 10 that follow the ground surface G on the ground. By operating the set height operating tool 33, the support position (position of the shaft core P5) of the center float 9 (float 10) with respect to the seedling planting device 5 (planting transmission case 6) is moved up and down. The set height H1 is changed to.
（高さセンサーの構成）
　図５～図９に示すように、支持部材３６が、右の支持フレーム２１の中央側端部２１ａに連結されている。支持部材３６に連結されたブラケット３７に、ポテンショメータ型式の高さセンサー３８が支持されており、高さセンサー３８のアーム状の入力部３８ａが、左右方向に沿った軸芯Ｐ７周りに揺動可能に高さセンサー３８に設けられて、高さセンサー３８から下側に延出されている。 (Height sensor configuration)
As shown in FIGS. 5 to 9, the support member 36 is connected to the central end portion 21a of the right support frame 21. A potentiometer-type height sensor 38 is supported by a bracket 37 connected to the support member 36, and the arm-shaped input portion 38a of the height sensor 38 can swing around the axis P7 along the left-right direction. It is provided on the height sensor 38 and extends downward from the height sensor 38.
　これにより、側面視及び平面視で、苗植付装置５におけるセンターフロート９及びフロート１０の前端部９ａ，１０ａよりも後側の部分に，高さセンサー３８が設けられ、右及び左の支持フレーム２１，２２に対して後側に、高さセンサー３８が設けられている。高さセンサー３８は、側面視で、支点フレーム２５の上方に配置されており、植付伝動ケース６の上面部と略同じ高さに配置されている。 As a result, in side view and plan view, the height sensor 38 is provided in the portion of the seedling planting device 5 behind the front end portions 9a and 10a of the center float 9 and the float 10, and the right and left support frames are provided. A height sensor 38 is provided on the rear side of 21 and 22. The height sensor 38 is arranged above the fulcrum frame 25 in a side view, and is arranged at substantially the same height as the upper surface portion of the planting transmission case 6.
（リンク機構の構成）
　図５～図９に示すように、センターフロート９の前部と高さセンサー３８の入力部３８ａとに亘って、リンク機構３９が接続されており、リンク機構３９は、揺動部材４１と接続部材４２とを有している。 (Structure of link mechanism)
As shown in FIGS. 5 to 9, the link mechanism 39 is connected to the front portion of the center float 9 and the input portion 38a of the height sensor 38, and the link mechanism 39 is connected to the swing member 41. It has a member 42.
　天秤状の連動部４３が、左右方向に沿った軸芯Ｐ８周りに揺動可能に、支持部材３６に支持されており、支点フレーム２５に連結されて前側に延出されたアーム２５ｂが、連動部４３の後部に接続されて、連動部４３の姿勢が設定されている。 The balance-shaped interlocking portion 43 is supported by the support member 36 so as to be swingable around the axis P8 along the left-right direction, and the arm 25b connected to the fulcrum frame 25 and extended to the front side is interlocked. It is connected to the rear portion of the portion 43, and the posture of the interlocking portion 43 is set.
　連動部４３の前部の左右方向に沿った軸芯Ｐ９（支持軸芯に相当）周りに、揺動部材４１が揺動可能に支持されており、揺動部材４１が連動部４３を介して苗植付装置５に揺動可能に支持されている。揺動部材４１に、軸芯Ｐ９から前側に延出された第１部分４１ａと、軸芯Ｐ９から上側に延出された第２部分４１ｂとが設けられており、第１部分４１ａの前部が、リンク部材４４を介してセンターフロート９の前部に接続されている。 A swing member 41 is swingably supported around a shaft core P9 (corresponding to a support shaft core) along the left-right direction of the front portion of the interlocking portion 43, and the swing member 41 is supported via the interlocking portion 43. It is swingably supported by the seedling planting device 5. The swing member 41 is provided with a first portion 41a extending forward from the shaft core P9 and a second portion 41b extending upward from the shaft core P9, and the front portion of the first portion 41a. Is connected to the front portion of the center float 9 via the link member 44.
　接続部材４２が、前後方向に沿って配置されており、接続部材４２の前部と揺動部材４１の第２部分４１ｂの上部とが接続され、接続部材４２の後部と高さセンサー３８の入力部３８ａの下部とが接続されて、接続部材４２が、高さセンサー３８の入力部３８ａと、揺動部材４１の第２部分４１ｂとに亘って接続されている。これにより、高さセンサー３８及びリンク機構３９が、支持部材３６に支持されている。 The connecting member 42 is arranged along the front-rear direction, the front portion of the connecting member 42 and the upper portion of the second portion 41b of the swing member 41 are connected, and the rear portion of the connecting member 42 and the input of the height sensor 38 are connected. The lower part of the portion 38a is connected, and the connecting member 42 is connected to the input portion 38a of the height sensor 38 and the second portion 41b of the rocking member 41. As a result, the height sensor 38 and the link mechanism 39 are supported by the support member 36.
（引っ張りバネの構成）
　図５～図９に示すように、支持部材３６の後部に連結されたブラケット４５に、天秤状のバネ支持部４６が、左右方向に沿った軸芯Ｐ１０周りに揺動可能に支持されており、バネ支持部４６がリンク機構３９の揺動部材４１に対して後側に設けられている。支点フレーム２５に連結されて後側に延出されたアーム２５ｃ（バネ連動部に相当）が、バネ支持部４６の前部に接続されて、バネ支持部４６の姿勢が設定されている。 (Structure of tension spring)
As shown in FIGS. 5 to 9, a balance-shaped spring support portion 46 is swingably supported around the axis P10 along the left-right direction by a bracket 45 connected to the rear portion of the support member 36. The spring support portion 46 is provided on the rear side of the swing member 41 of the link mechanism 39. The arm 25c (corresponding to the spring interlocking portion) connected to the fulcrum frame 25 and extended to the rear side is connected to the front portion of the spring support portion 46, and the posture of the spring support portion 46 is set.
　コイルバネ状の引っ張りバネ４７が、揺動部材４１の第１部分４１ａの下部と、バネ支持部４６の後部とに亘って接続されている。引っ張りバネ４７は、揺動部材４１、連動部４３及び支点フレーム２５に対して下側の低い位置を前後方向に沿って配置されている。 A coil spring-shaped tension spring 47 is connected to the lower portion of the first portion 41a of the swing member 41 and the rear portion of the spring support portion 46. The tension spring 47 is arranged at a lower position on the lower side with respect to the swing member 41, the interlocking portion 43, and the fulcrum frame 25 along the front-rear direction.
　引っ張りバネ４７の付勢力により、揺動部材４１が図８及び図９の反時計方向に付勢されて、センターフロート９が揺動部材４１及びリンク部材４４を介して、苗植付装置５（植付伝動ケース６）に対して下側に付勢されており、センターフロート９が田面Ｇに接地追従する。 The urging force of the tension spring 47 urges the rocking member 41 in the counterclockwise direction of FIGS. 8 and 9, and the center float 9 passes through the rocking member 41 and the link member 44 to the seedling planting device 5 ( It is urged downward with respect to the planting transmission case 6), and the center float 9 follows the ground surface G on the ground.
（高さセンサー及びリンク機構と苗植付装置の作業状態及び非作業状態との関係）
　図３，５，６に示すように、苗植付装置５の作業状態Ａ１において、右の支持フレーム２１の中央側端部２１ａと、左の支持フレーム２２の中央側端部２２ａとが、間隔を空けて突き合わされて、右及び左の支持フレーム２１，２２が左右方向に沿って配置されている。 (Relationship between height sensor and link mechanism and working and non-working state of seedling planting device)
As shown in FIGS. 3, 5 and 6, in the working state A1 of the seedling planting device 5, the center side end portion 21a of the right support frame 21 and the center side end portion 22a of the left support frame 22 are spaced apart from each other. The right and left support frames 21 and 22 are arranged along the left-right direction so as to be butted against each other.
　苗植付装置５の作業状態Ａ１において、リンク機構３９及び高さセンサー３８、引っ張りバネ４７が、平面視で、右及び左の支持フレーム２１，２２の中央側端部２１ａ，２２ａの間に配置されている。センターフロート９が、平面視及び側面視で、右及び左の支持フレーム２１，２２の中央側端部２１ａ，２２ａの間の下方に配置されている。 In the working state A1 of the seedling planting device 5, the link mechanism 39, the height sensor 38, and the tension spring 47 are arranged between the central end portions 21a and 22a of the right and left support frames 21 and 22 in a plan view. Has been done. The center float 9 is arranged below between the central end portions 21a and 22a of the right and left support frames 21 and 22 in plan view and side view.
　図４に示すように、苗植付装置５の非作業状態Ａ２において、右及び左の支持フレーム２１，２２の中央側端部２１ａ，２２ａが、支持フレーム２１，２２における中央側端部２１ａ，２２ａの反対側の端部２１ｂ，２２ｂに対して、後側に配置されるように、右及び左の支持フレーム２１，２２が前後方向に沿った姿勢に配置される。 As shown in FIG. 4, in the non-working state A2 of the seedling planting apparatus 5, the central side end portions 21a, 22a of the right and left support frames 21 and 22 are the central side end portions 21a of the support frames 21 and 22. The right and left support frames 21 and 22 are arranged in a posture along the front-rear direction so as to be arranged on the rear side with respect to the opposite ends 21b and 22b of 22a.
　右の支持フレーム２１の中央側端部２１ａに連結された支持部材３６に、高さセンサー３８及びリンク機構３９、引っ張りバネ４７が支持されている。苗植付装置５の非作業状態Ａ２において、右及び左の支持フレーム２１，２２の中央側端部２１ａ，２２ａが後側（機体３０の後部の反対側）に位置することになり、高さセンサー３８及びリンク機構３９、引っ張りバネ４７、センターフロート９が、後側（機体３０の後部の反対側）に位置する。 The height sensor 38, the link mechanism 39, and the tension spring 47 are supported by the support member 36 connected to the central end portion 21a of the right support frame 21. In the non-working state A2 of the seedling planting device 5, the center side ends 21a and 22a of the right and left support frames 21 and 22 are located on the rear side (opposite side of the rear part of the machine body 30), and the height is high. The sensor 38, the link mechanism 39, the tension spring 47, and the center float 9 are located on the rear side (opposite the rear side of the machine body 30).
（苗植付装置の昇降制御）
　図８に示すように、油圧シリンダ４に作動油を給排操作して油圧シリンダ４を作動させる制御弁４８が設けられており、制御装置４０により制御弁４８が以下の説明のように操作される。 (Elevation control of seedling planting device)
As shown in FIG. 8, a control valve 48 is provided in the hydraulic cylinder 4 to operate the hydraulic cylinder 4 by supplying and discharging hydraulic oil, and the control valve 48 is operated by the control device 40 as described below. Cylinder.
　田面Ｇに接地追従するセンターフロート９に対して、苗植付装置５（植付伝動ケース６）が昇降作動して、センターフロート９（田面Ｇ）から苗植付装置５（植付伝動ケース６）までの作業高さＨ２が変化すると、これに伴いリンク機構３９において、揺動部材４１が軸芯Ｐ９周りに揺動し、接続部材４２が前後動して、苗植付装置５（植付伝動ケース６）に対するセンターフロート９の昇降作動が、高さセンサー３８の入力部３８ａに伝達される。 The seedling planting device 5 (planting transmission case 6) moves up and down with respect to the center float 9 that follows the ground surface G on the ground, and the seedling planting device 5 (planting transmission case 6) is operated from the center float 9 (field surface G). When the working height H2 up to () changes, the swing member 41 swings around the axis P9 in the link mechanism 39, and the connecting member 42 moves back and forth to move the seedling planting device 5 (planting). The raising and lowering operation of the center float 9 with respect to the transmission case 6) is transmitted to the input portion 38a of the height sensor 38.
　これにより、センターフロート９（田面Ｇ）から苗植付装置５（植付伝動ケース６）までの作業高さＨ２が高さセンサー３８により検出されて、高さセンサー３８により検出された作業高さＨ２が、制御装置４０に入力される。 As a result, the working height H2 from the center float 9 (field surface G) to the seedling planting device 5 (planting transmission case 6) is detected by the height sensor 38, and the working height detected by the height sensor 38. H2 is input to the control device 40.
　制御装置４０は、高さセンサー３８により検出された作業高さＨ２が、事前に設定された設定値となるように、制御弁４８を操作し、油圧シリンダ４を作動させて、苗植付装置５（植付伝動ケース６）を機体３０に対して昇降操作する。設定値は、高さセンサー３８の検出範囲の略中央に設定された値で、高さセンサー３８に対して固定された値であり、設定高さＨ１に対応する。 The control device 40 operates the control valve 48 and operates the hydraulic cylinder 4 so that the working height H2 detected by the height sensor 38 becomes a preset value, and the seedling planting device 5 (planting transmission case 6) is moved up and down with respect to the machine body 30. The set value is a value set substantially in the center of the detection range of the height sensor 38, is a value fixed to the height sensor 38, and corresponds to the set height H1.
　高さセンサー３８により検出された作業高さＨ２が設定値（設定高さＨ１）となるように、苗植付装置５（植付伝動ケース６）が昇降操作されることにより、苗植付装置５（植付伝動ケース６）が田面Ｇから設定高さＨ１に維持される。 The seedling planting device 5 (planting transmission case 6) is moved up and down so that the working height H2 detected by the height sensor 38 becomes the set value (set height H1). 5 (planting transmission case 6) is maintained at the set height H1 from the field surface G.
　苗植付装置５において、回転ケース７及び植付アーム８は一定の軌跡で回転駆動されるので、苗植付装置５（植付伝動ケース６）が田面Ｇから設定高さＨ１に維持されることによって、植付アーム８による苗の植付深さが、設定植付深さに維持される。設定高さＨ１は、設定植付深さに対応する。 In the seedling planting device 5, the rotary case 7 and the planting arm 8 are rotationally driven in a constant locus, so that the seedling planting device 5 (planting transmission case 6) is maintained at the set height H1 from the rice field surface G. As a result, the planting depth of the seedlings by the planting arm 8 is maintained at the set planting depth. The set height H1 corresponds to the set planting depth.
（設定高さの変更）
　前述の（センターフロート（田面）から苗植付装置（植付伝動ケース）までの設定高さの設定）及び図８に示すように、設定高さ操作具３３が操作されることにより、設定高さＨ１（設定植付深さ）が変更される。 (Change of set height)
As shown in the above-mentioned (setting of the set height from the center float (field surface) to the seedling planting device (planting transmission case)) and FIG. 8, the set height operating tool 33 is operated to set the height. H1 (set planting depth) is changed.
　図８に示す状態は、設定高さＨ１（設定植付深さ）が最低高さ（最深）と最高高さ（最浅）との間に設定された中間状態である。
　図９に示す状態は、支点フレーム２５，２６が図８の反時計方向に回転操作されて、設定高さＨ１（設定植付深さ）が最低高さ（最深）に設定された状態である。 The state shown in FIG. 8 is an intermediate state in which the set height H1 (set planting depth) is set between the minimum height (deepest) and the maximum height (shallowest).
The state shown in FIG. 9 is a state in which the fulcrum frames 25 and 26 are rotated counterclockwise in FIG. 8 and the set height H1 (set planting depth) is set to the minimum height (maximum depth). ..
　図９に示す状態において、苗植付装置５（植付伝動ケース６）がセンターフロート９に向かって下方に接近するので、支点フレーム２５の，２６が図８の反時計方向に回転操作されることにより、支点フレーム２５のアーム２５ｂにより、連動部４３が図８の時計方向に揺動して、揺動部材４１の軸芯Ｐ９の位置が、苗植付装置５（植付伝動ケース６）に対して高側に変更される。これと同時に支点フレーム２５のアーム２５ｃにより、バネ支持部４６が図８の時計方向に揺動して、バネ支持部４６における引っ張りバネ４７の接続部分が前方に移動する。 In the state shown in FIG. 9, since the seedling planting device 5 (planting transmission case 6) approaches downward toward the center float 9, 26 of the fulcrum frame 25 is rotated counterclockwise in FIG. As a result, the interlocking portion 43 swings clockwise by the arm 25b of the fulcrum frame 25, and the position of the axis P9 of the swing member 41 is set to the seedling planting device 5 (planting transmission case 6). It is changed to the higher side. At the same time, the arm 25c of the fulcrum frame 25 swings the spring support portion 46 in the clockwise direction in FIG. 8, and the connection portion of the tension spring 47 in the spring support portion 46 moves forward.
　図１０に示す状態は、支点フレーム２５，２６が図８の時計方向に回転操作されて、設定高さＨ１（設定植付深さ）が最高高さ（最浅）に設定された状態である。 The state shown in FIG. 10 is a state in which the fulcrum frames 25 and 26 are rotated in the clockwise direction of FIG. 8 and the set height H1 (set planting depth) is set to the maximum height (shallowest). ..
　図１０に示す状態において、苗植付装置５（植付伝動ケース６）がセンターフロート９から上方に離れるので、支点フレーム２５の，２６が図８の時計方向に回転操作されることにより、支点フレーム２５のアーム２５ｂにより、連動部４３が図８の反時計方向に揺動して、揺動部材４１の軸芯Ｐ９の位置が、苗植付装置５（植付伝動ケース６）に対して低側に変更される。これと同時に支点フレーム２５のアーム２５ｃにより、バネ支持部４６が図８の反時計方向に揺動して、バネ支持部４６における引っ張りバネ４７の接続部分が後方に移動する。 In the state shown in FIG. 10, since the seedling planting device 5 (planting transmission case 6) is separated upward from the center float 9, the fulcrum frames 25 and 26 are rotated in the clockwise direction of FIG. The arm 25b of the frame 25 causes the interlocking portion 43 to swing counterclockwise in FIG. 8, and the position of the axis P9 of the swing member 41 is displaced with respect to the seedling planting device 5 (planting transmission case 6). It is changed to the lower side. At the same time, the arm 25c of the fulcrum frame 25 swings the spring support portion 46 in the counterclockwise direction of FIG. 8, and the connection portion of the tension spring 47 in the spring support portion 46 moves rearward.
　以上のように、設定高さＨ１（設定植付深さ）が変更されても、センターフロート９と揺動部材４１の軸芯Ｐ９の上下方向の位置関係に変化は少ない。
　設定高さＨ１（設定植付深さ）の変更に伴って、バネ支持部４６が揺動操作されることにより、揺動部材４１の第１部分４１ａとバネ支持部４６との前後間隔に変化は小さく、設定高さＨ１（設定植付深さ）が変更されても、引っ張りバネ４７の付勢力が一定に維持される。 As described above, even if the set height H1 (set planting depth) is changed, there is little change in the vertical positional relationship between the center float 9 and the axis P9 of the swing member 41.
By swinging the spring support portion 46 with the change of the set height H1 (set planting depth), the front-rear distance between the first portion 41a of the swing member 41 and the spring support portion 46 changes. Is small, and even if the set height H1 (set planting depth) is changed, the urging force of the tension spring 47 is maintained constant.
　これに対して、高さセンサー３８は苗植付装置５（植付伝動ケース６）に設けられているので、前述のように設定高さＨ１（設定植付深さ）が変更されると、センターフロート９及び揺動部材４１の軸芯Ｐ９と、高さセンサー３８とにおいて、上下方向の位置関係は変化する。 On the other hand, since the height sensor 38 is provided in the seedling planting device 5 (planting transmission case 6), when the set height H1 (set planting depth) is changed as described above, The positional relationship in the vertical direction changes between the axis P9 of the center float 9 and the swing member 41 and the height sensor 38.
　この場合、高さセンサー３８の入力部３８ａと揺動部材４１の第２部分４１ｂとに亘って接続部材４２が接続されているので、前述のように、センターフロート９及び揺動部材４１の軸芯Ｐ９と高さセンサー３８との上下方向の位置関係が変化しても、接続部材４２が揺動部材４１の第２部分４ｂとの接続点周りに揺動すること、並びに、接続部材４２が高さセンサー３８の入力部３８ａとの接続点周りに揺動することにより、前述の上下方向の位置関係の変化が吸収される。 In this case, since the connecting member 42 is connected to the input portion 38a of the height sensor 38 and the second portion 41b of the swinging member 41, the shafts of the center float 9 and the swinging member 41 are as described above. Even if the vertical positional relationship between the core P9 and the height sensor 38 changes, the connecting member 42 swings around the connection point with the second portion 4b of the swinging member 41, and the connecting member 42 By swinging around the connection point of the height sensor 38 with the input portion 38a, the above-mentioned change in the positional relationship in the vertical direction is absorbed.
　これにより、高さセンサー３８の入力部３８ａの設定値に対応する姿勢は変化しないのであり、設定高さＨ１（設定植付深さ）が変更されても、変更された設定高さＨ１（設定植付深さ）が、高さセンサー３８の設定値に対応する。 As a result, the posture corresponding to the set value of the input unit 38a of the height sensor 38 does not change, and even if the set height H1 (set planting depth) is changed, the changed set height H1 (setting) is changed. The planting depth) corresponds to the set value of the height sensor 38.
　変更された設定高さＨ１（設定植付深さ）が高さセンサー３８の設定値に対応することによって、前述の（苗植付装置の昇降制御）に記載のように、高さセンサー３８により検出された作業高さＨ２が設定値となるように、苗植付装置５（植付伝動ケース６）が昇降操作されることにより、苗植付装置５（植付伝動ケース６）が変更された設定高さＨ１に維持される（苗の植付深さが変更された設定植付深さに維持される）。 By making the changed set height H1 (set planting depth) correspond to the set value of the height sensor 38, as described in the above-mentioned (elevation control of the seedling planting device), the height sensor 38 The seedling planting device 5 (planting transmission case 6) is changed by raising and lowering the seedling planting device 5 (planting transmission case 6) so that the detected work height H2 becomes the set value. The set height is maintained at H1 (the planting depth of seedlings is maintained at the changed set planting depth).
　このことについて言い換えると、設定高さＨ１（設定植付深さ）が変更された場合、揺動部材４１の軸芯Ｐ９の位置が上下に変更されることにより、高さセンサー３８により検出された作業高さＨ２に、揺動部材４１の軸芯Ｐ９の位置変更の分だけ加算又は減算が行われると見なすことができる。 In other words, when the set height H1 (set planting depth) is changed, the position of the axis P9 of the rocking member 41 is changed up and down, and the height sensor 38 detects it. It can be considered that addition or subtraction is performed to the working height H2 by the amount of change in the position of the shaft core P9 of the swing member 41.
　これにより、設定高さＨ１（設定植付深さ）が変更された場合、高さセンサー３８により検出され加算又は減算が行われた作業高さＨ２が、変更された設定高さＨ１（設定植付深さ）となるように、苗植付装置５（植付伝動ケース６）の昇降操作が行われると見なすことができる。 As a result, when the set height H1 (set planting depth) is changed, the working height H2 detected by the height sensor 38 and added or subtracted is changed to the changed set height H1 (set planting depth). It can be considered that the raising and lowering operation of the seedling planting device 5 (planting transmission case 6) is performed so as to have the depth).
（発明の実施の第１別形態）
　右の支持フレーム２１と左の支持フレーム２２との関係を逆転して、３個の植付伝動ケース６、センターフロート９及び２個のフロート１０が、左の支持フレーム２２に支持され、２個の植付伝動ケース６及び２個のフロート１０が、右の支持フレーム２１に支持されるように構成されてもよい。 (First Different Form of Implementation of the Invention)
By reversing the relationship between the right support frame 21 and the left support frame 22, three planting transmission cases 6, a center float 9 and two floats 10 are supported by the left support frame 22 and two. The planting transmission case 6 and the two floats 10 may be configured to be supported by the right support frame 21.
　この構成において、左の支持フレーム２２の中央側端部２２ａに、支持部材３６が連結され、高さセンサー３８及びリンク機構３９、引っ張りバネ４７が支持部材３６に支持されるように構成されてもよい。 In this configuration, even if the support member 36 is connected to the central end portion 22a of the left support frame 22, the height sensor 38, the link mechanism 39, and the tension spring 47 are supported by the support member 36. good.
（発明の実施の第２別形態）
　高さセンサー３８において、高さセンサー３８の入力部３８ａが高さセンサー３８から上側に延出されるように構成されてもよい。 (Second alternative form of carrying out the invention)
In the height sensor 38, the input portion 38a of the height sensor 38 may be configured to extend upward from the height sensor 38.
（発明の実施の第３別形態）
　設定高さ操作具３３及び電動モータ３２に代えて、植付深さレバー（図示せず）を支点フレーム２５，２６に連結して、運転者が植付深さレバーを操作して支点フレーム２５，２６を回転操作し、設定高さＨ１を変更するように構成してもよい。 (Third alternative form of carrying out the invention)
Instead of the set height operating tool 33 and the electric motor 32, a planting depth lever (not shown) is connected to the fulcrum frames 25 and 26, and the driver operates the planting depth lever to operate the fulcrum frame 25. , 26 may be rotated to change the set height H1.
（発明の実施の第４別形態）
　苗植付装置５が、８条植え型式や、６条植え型式、５条植え型式、４条植え型式に構成されてもよい。
　この構成において、右及び左の支持フレーム２１，２２を廃止し、１個の支持フレーム（図示せず）が左右方向に沿って配置されてもよい。 (Fourth Different Embodiment of the Invention)
The seedling planting device 5 may be configured as an 8-row planting type, a 6-row planting type, a 5-row planting type, or a 4-row planting type.
In this configuration, the right and left support frames 21 and 22 may be abolished and one support frame (not shown) may be arranged along the left-right direction.
（発明の実施の第５別形態）
　左右方向に沿った軸芯周りに回転駆動されることにより田面Ｇを整地する整地装置（図示せず）が、右及び左の支持フレーム２１，２２に対して前側に支持されるように構成されてもよい。 (Fifth alternative form of carrying out the invention)
A ground leveling device (not shown) that leveles the field surface G by being rotationally driven around the axis along the left-right direction is configured to be supported on the front side with respect to the right and left support frames 21 and 22. You may.
　この構成において、苗植付装置５が非作業状態Ａ２に設定された場合、整地装置が、支持フレーム１９に対応する部分、右の支持フレーム２１に対応する部分、左の支持フレーム２２に対応する部分に分離されて、整地装置の右及び左の支持フレーム２１，２２に対応する部分が、右及び左の支持フレーム２１，２２と一緒に移動するように構成されてもよい。 In this configuration, when the seedling planting device 5 is set to the non-working state A2, the leveling device corresponds to the portion corresponding to the support frame 19, the portion corresponding to the right support frame 21, and the left support frame 22. Separated into portions, the portions corresponding to the right and left support frames 21 and 22 of the leveling device may be configured to move together with the right and left support frames 21 and 22.
　本発明は、乗用型田植機ばかりではなく、田面Ｇに種子（資材に相当）を供給する播種装置（作業装置に相当）を機体３０の後部に支持した乗用型直播機や、田面Ｇに薬剤（資材に相当）を供給する薬剤供給装置を機体３０の後部に支持した乗用型管理機にも適用できる。 The present invention is not limited to a passenger-type rice transplanter, but also a passenger-type direct sowing machine in which a seeding device (corresponding to a working device) for supplying seeds (corresponding to a material) to the rice transplanter G is supported at the rear of the machine body 30, and a chemical agent to the rice transplanter G. It can also be applied to a passenger-type management machine in which a drug supply device for supplying (corresponding to a material) is supported at the rear of the machine body 30.
　４　　　油圧シリンダ（昇降機構）
　５　　　苗植付装置（作業装置）
　６　　　植付伝動ケース（作業部）
　９　　　センターフロート（フロート）
　９ａ　　前端部
　２０　　支持アーム（切換機構）
　２１　　支持フレーム
　２１ａ　中央側端部
　２１ｂ　端部
　２２　　支持フレーム
　２２ａ　中央側端部
　２２ｂ　端部
　２５ｃ　アーム（バネ連動部）
　３０　　機体
　３２　　電動モータ（設定高さ変更部）
　３３　　設定高さ操作具（設定高さ変更部）
　３６　　支持部材
　３８　　高さセンサー
　３８ａ　入力部
　３９　　リンク機構
　４０　　制御装置（制御部）
　４１　　揺動部材
　４１ａ　第１部分
　４１ｂ　第２部分
　４２　　接続部材
　４３　　連動部
　４６　　バネ支持部
　４７　　引っ張りバネ
　Ａ１　　作業状態
　Ａ２　　非作業状態
　Ｇ　　　田面
　Ｈ１　　設定高さ
　Ｈ２　　作業高さ
　Ｐ９　　軸芯（支持軸芯） 4 Hydraulic cylinder (elevating mechanism)
5 Seedling planting equipment (working equipment)
6 Planting transmission case (working part)
9 Center float (float)
9a Front end 20 Support arm (switching mechanism)
21 Support frame 21a Central side end 21b End 22 Support frame 22a Central side end 22b End 25c Arm (spring interlocking part)
30 Aircraft 32 Electric motor (set height change part)
33 Set height operation tool (set height change part)
36 Support member 38 Height sensor 38a Input unit 39 Link mechanism 40 Control device (control unit)
41 Swing member 41a 1st part 41b 2nd part 42 Connection member 43 Interlocking part 46 Spring support part 47 Tension spring A1 Working state A2 Non-working state G Field surface H1 Set height H2 Working height P9 Jikushin (supporting shaft core)

Claims (10)

  1. 　機体の後部に昇降可能に支持され、田面に資材を供給する作業装置と、
    　前記機体に対して前記作業装置を昇降操作可能な昇降機構と、
    　前記作業装置の下部に昇降可能に支持され、田面に接地追従するフロートと、
    　側面視で、前記作業装置における前記フロートの前端部よりも後側の部分に設けられた高さセンサーと、
    　前記フロートと前記高さセンサーとに亘って接続され、前記高さセンサーが前記フロートから前記作業装置までの作業高さを検出するように、前記作業装置に対する前記フロートの昇降作動を前記高さセンサーに伝達するリンク機構と、
    　前記高さセンサーの検出値に基づいて、前記作業高さが、事前に設定された設定高さとなるように、前記昇降機構を作動させる制御部とが備えられている水田作業機。     A work device that is supported by the rear part of the machine so that it can be raised and lowered and supplies materials to the surface of the field.
    An elevating mechanism capable of elevating and lowering the work device with respect to the machine,
    A float that is supported by the lower part of the work equipment so that it can be raised and lowered and follows the ground surface.
    From the side view, a height sensor provided in a portion of the work equipment behind the front end of the float, and a height sensor.
    The height sensor is connected to the float and the height sensor, and the height sensor moves the float up and down with respect to the working device so that the height sensor detects the working height from the float to the working device. Link mechanism to transmit to
    A paddy field working machine provided with a control unit for operating the elevating mechanism so that the working height becomes a preset height based on a detection value of the height sensor.
  2. 　前記リンク機構は、
    　左右方向に沿った支持軸芯周りに揺動可能に前記作業装置に支持され、前記支持軸芯から前側に延出されて前記フロートに接続された第１部分が設けられ、前記支持軸芯から上側に延出された第２部分が設けられた揺動部材と、
    　前後方向に沿って配置され、前記高さセンサーの入力部と前記第２部分とに亘って接続された接続部材とを有している請求項１に記載の水田作業機。     The link mechanism is
    A first portion that is swingably supported by the work device around the support shaft core along the left-right direction, extends forward from the support shaft core, and is connected to the float is provided, and is provided from the support shaft core. A rocking member provided with a second portion extending upward, and
    The paddy field working machine according to claim 1, which is arranged along the front-rear direction and has a connecting member connected over an input portion of the height sensor and the second portion.
  3. 　前記入力部が前記高さセンサーから下側に延出され、前記入力部の下部と前記接続部材の後部とが接続されている請求項２に記載の水田作業機。 The paddy field working machine according to claim 2, wherein the input unit extends downward from the height sensor, and the lower portion of the input unit and the rear portion of the connecting member are connected.
  4. 　バネ支持部が、前記揺動部材に対して後側に設けられ、
    　引っ張りバネが、前記第１部分と前記バネ支持部とに亘って接続されて、
    　前記引っ張りバネの付勢力により、前記フロートが前記揺動部材を介して前記作業装置に対して下側に付勢されている請求項２又は３に記載の水田作業機。     A spring support portion is provided on the rear side with respect to the swing member.
    The tension spring is connected over the first portion and the spring support portion,
    The paddy field working machine according to claim 2 or 3, wherein the float is urged downward with respect to the working device by the urging force of the tension spring.
  5. 　前記作業装置に対する前記フロートの支持位置を上下に変更することにより、前記設定高さを変更可能な設定高さ変更部が備えられ、
    　前記設定高さ変更部の作動により、前記設定高さが高側に変更されるのに伴って、前記支持軸芯の位置を前記作業装置に対して低側に変更し、前記設定高さが低側に変更されるのに伴って、前記支持軸芯の位置を前記作業装置に対して高側に変更する連動部が備えられている請求項２～４のうちのいずれか一項に記載の水田作業機。     By changing the support position of the float with respect to the working device up and down, a set height changing portion capable of changing the set height is provided.
    As the set height is changed to the higher side by the operation of the set height changing portion, the position of the support shaft core is changed to the lower side with respect to the working device, and the set height is changed. 6. Paddy field work machine.
  6. 　バネ支持部が、前記揺動部材に対して後側に設けられ、
    　引っ張りバネが、前記第１部分と前記バネ支持部とに亘って接続されて、
    　前記引っ張りバネの付勢力により、前記フロートが前記揺動部材を介して前記作業装置に対して下側に付勢され、
    　前記設定高さ変更部の作動により、前記バネ支持部の位置を前後方向に沿って変更して、前記引っ張りバネの付勢力を一定に維持するバネ連動部が備えられている請求項５に記載の水田作業機。     A spring support portion is provided on the rear side with respect to the swing member.
    The tension spring is connected over the first portion and the spring support portion,
    The urging force of the tension spring causes the float to be urged downward with respect to the working device via the swing member.
    The fifth aspect of claim 5 is provided with a spring interlocking portion that changes the position of the spring support portion along the front-rear direction by operating the set height changing portion to maintain a constant urging force of the tension spring. Paddy field work machine.
  7. 　支持フレームが、前記作業装置における前記フロートの前端部よりも後側の部分に、左右方向に沿って配置され、
    　田面に資材を供給する作業部が、前記支持フレームに連結されて、前記支持フレームから後側に延出され、
    　前記高さセンサーが、側面視で、前記支持フレームよりも後側に設けられている請求項１～６のうちのいずれか一項に記載の水田作業機。     A support frame is arranged along the left-right direction in a portion of the work equipment behind the front end of the float.
    A working unit that supplies materials to the field surface is connected to the support frame and extends rearward from the support frame.
    The paddy field working machine according to any one of claims 1 to 6, wherein the height sensor is provided on the rear side of the support frame in a side view.
  8. 　右及び左の前記支持フレームが設けられ、
    　右の前記支持フレームにおける前記作業装置の左右中央側の中央側端部と、左の前記支持フレームにおける前記作業装置の左右中央側の中央側端部とが、間隔を空けて突き合わされて、右及び左の前記支持フレームが左右方向に沿って配置された作業状態と、
    　右及び左の前記支持フレームが前後方向に沿った姿勢で、左右方向に並んで配置された非作業状態とが設定され、
    　前記作業装置を前記作業状態及び前記非作業状態に切換可能な切換機構が備えられ、
    　前記リンク機構が、平面視で、前記作業状態での右及び左の前記支持フレームの中央側端部の間に配置されている請求項７に記載の水田作業機。     The right and left support frames are provided,
    The left and right center side ends of the work device in the right support frame and the left and right center side ends of the work device in the left support frame are butted at intervals to the right. And the working state in which the support frame on the left is arranged along the left-right direction,
    A non-working state is set in which the right and left support frames are arranged side by side in the left-right direction in a posture along the front-rear direction.
    A switching mechanism capable of switching the working device between the working state and the non-working state is provided.
    The paddy field working machine according to claim 7, wherein the link mechanism is arranged between the central end portions of the right and left support frames in the working state in a plan view.
  9. 　支持部材が、右及び左のうちの一方の前記支持フレームの中央側端部に取り付けられ、
    　前記高さセンサー及び前記リンク機構が、前記支持部材に支持されている請求項８に記載の水田作業機。     A support member is attached to the central end of the support frame on either the right or left side.
    The paddy field working machine according to claim 8, wherein the height sensor and the link mechanism are supported by the support member.
  10. 　前記非作業状態は、前記支持フレームの中央側端部が、前記支持フレームにおける中央側端部の反対側の端部に対して、後側に配置されるように、前記支持フレームが前後方向に沿った姿勢に配置される請求項９に記載の水田作業機。 In the non-working state, the support frame is arranged in the front-rear direction so that the central end portion of the support frame is arranged on the rear side with respect to the opposite end portion of the central side end portion of the support frame. The paddy field working machine according to claim 9, which is arranged in a posture along the line.
PCT/JP2021/021474 2020-07-10 2021-06-07 Paddy field work machine WO2022009578A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000270628A (en) * 1999-03-26 2000-10-03 Kubota Corp Sulky rice transplanter
JP2014198011A (en) * 2013-03-29 2014-10-23 株式会社クボタ Rice transplanter
JP2015065904A (en) * 2013-09-30 2015-04-13 株式会社クボタ Paddy field working machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5715013B2 (en) 2011-09-12 2015-05-07 株式会社クボタ Ride type paddy field work machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000270628A (en) * 1999-03-26 2000-10-03 Kubota Corp Sulky rice transplanter
JP2014198011A (en) * 2013-03-29 2014-10-23 株式会社クボタ Rice transplanter
JP2015065904A (en) * 2013-09-30 2015-04-13 株式会社クボタ Paddy field working machine

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