WO2009110280A1 - Riding - type rice transplanter - Google Patents

Riding - type rice transplanter Download PDF

Info

Publication number
WO2009110280A1
WO2009110280A1 PCT/JP2009/051982 JP2009051982W WO2009110280A1 WO 2009110280 A1 WO2009110280 A1 WO 2009110280A1 JP 2009051982 W JP2009051982 W JP 2009051982W WO 2009110280 A1 WO2009110280 A1 WO 2009110280A1
Authority
WO
WIPO (PCT)
Prior art keywords
traveling
pedal
shift
shift pedal
speed change
Prior art date
Application number
PCT/JP2009/051982
Other languages
French (fr)
Japanese (ja)
Inventor
誠 井上
崇 中嶌
圭志 絹田
Original Assignee
ヤンマー株式会社
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 ヤンマー株式会社 filed Critical ヤンマー株式会社
Priority to CN200980107746XA priority Critical patent/CN101960182A/en
Priority to KR1020167002185A priority patent/KR101716724B1/en
Publication of WO2009110280A1 publication Critical patent/WO2009110280A1/en

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01CPLANTING; SOWING; FERTILISING
    • A01C11/00Transplanting machines
    • A01C11/003Transplanting machines for aquatic plants; for planting underwater, e.g. rice
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H59/00Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02Selector apparatus
    • F16H59/04Ratio selector apparatus
    • F16H59/06Ratio selector apparatus the ratio being infinitely variable
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38Control of exclusively fluid gearing
    • F16H61/40Control of exclusively fluid gearing hydrostatic
    • F16H61/42Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/437Pump capacity control by mechanical control means, e.g. by levers or pedals

Definitions

  • the present invention relates to a riding type rice transplanter in which a seedling planting device is attached to the rear or front of a traveling machine body. More specifically, the present invention relates to a riding type rice transplanter in which travel speed is changed with a step-type shift pedal.
  • the vehicle speed is generally changed by adjusting the fuel injection amount, but the engine of the rice transplanter not only runs but also drives the seedling planting device, so the engine output changes a lot. Therefore, the vehicle speed is changed by controlling the traveling speed change mission.
  • Patent Document 1 discloses mechanically interlocking and connecting a transmission lever in a traveling transmission transmission and a stepping type transmission pedal provided in a driving operation unit with a rod or the like.
  • the shift pedal when the shift pedal is depressed, the shift mission is in an accelerated state, and when the shift pedal is released (when the shift pedal returns and moves), the shift mission is in a decelerated state.
  • Patent Document 1 since the shift pedal is mechanically connected to the shift lever of the traveling shift mission by a rod or the like, the movement of the shift pedal is immediately transmitted to the traveling shift mission, and the vehicle travels by depressing the shift pedal. There has been a concern that the aircraft may suddenly start or accelerate, or the traveling aircraft may suddenly decelerate or stop suddenly when the shift pedal is depressed. That is, there is a concern that the response follow-up of the movement of the traveling transmission mission with respect to the movement of the shift pedal is too sensitive.
  • the traveling vehicle body suddenly decelerates or stops suddenly, the traveling vehicle body is shifted laterally and becomes easy to meander.
  • the resistance of the shift lever in the traveling shift mission acts as a resistance to the movement of the shift pedal, which greatly increases the depression of the shift pedal.
  • a shift operability and a driving feeling are deteriorated due to a so-called kickback phenomenon in which an impact or a load when the shift lever is operated is transmitted to the shift pedal.
  • the object of the present invention is to solve these problems related to gear shifting in a riding type rice transplanter.
  • the first invention is the configuration of the most superordinate concept, and includes a traveling machine body on which an engine is mounted, and a seedling planting device that is attached to a rear portion of the traveling machine body so that the height can be adjusted.
  • the airframe is provided with a driving operation unit having a seat, a traveling wheel, a traveling speed change transmission that transmits the engine power to the traveling wheel by shifting, and a stepping type speed change pedal for changing the traveling speed.
  • the traveling shift mission is controlled by a power actuator that operates in response to the movement of the pedal.
  • detection means for detecting the stepping movement and the return movement of the shift pedal as electrical signals.
  • the detection means and the actuator are configured so that the detection means When the shift pedal is detected, the actuator increases the travel shift mission, and when the detection means detects the shift pedal return movement, the actuator decelerates the travel shift mission. Yes.
  • the detecting means can detect the amount of movement of the shift pedal per unit time, while the actuator performs a traveling shift transmission so that the change in vehicle speed per unit time can be adjusted.
  • a controller that can be controlled and that can adjust the relationship between the shift amount of the shift pedal per unit time and the rate of change of the vehicle speed is interposed between the detection means and the actuator.
  • an electric motor is adopted as the actuator.
  • a fifth invention is a subordinate concept of the first to fourth inventions.
  • the fifth invention further includes a brake mechanism that provides resistance to rotation of the traveling wheel, and the traveling speed change mission.
  • a clutch mechanism for switching output to the traveling wheel, and one actuating member for simultaneously switching the brake mechanism and the clutch mechanism.
  • the actuating member turns on the brake mechanism and turns off the clutch mechanism.
  • the travel stop state can be switched to the travel state by turning off the brake mechanism and turning on the clutch mechanism.
  • the operating member and the shift pedal are in a stopped state when the shift pedal is not depressed, and the actuating member is in a traveling state when the shift pedal is depressed. It is interlocked so that it becomes.
  • a stepping type brake pedal is provided in the driving operation unit of the traveling machine body, and the brake pedal and the actuating member are configured so that the brake pedal is depressed when the brake pedal is depressed.
  • the actuating member is interlocked so that the relationship with the shift pedal is cut off and the operation is stopped.
  • the traveling shift mission can be prevented from responding sensitively to the shift pedal movement. Accordingly, it is possible to prevent sudden start and acceleration due to depression of the shift pedal, and as a result, it is possible to prevent or significantly suppress the seedling from being deeply planted by preventing the traveling machine body from turning forward. In addition, since sudden stop and sudden deceleration due to the return movement of the shift pedal can be prevented, lateral slippage of the traveling machine body can be prevented or significantly reduced.
  • the movement of the shift pedal can be transmitted to the actuator by a mechanical mechanism.
  • adopting an electrical detection means as in the second invention is advantageous in terms of design because an interlocking member is not required.
  • the speed change of the traveling machine body can be smoothed to allow the traveling machine body to travel stably, and as a result, the effects of preventing deep planting and preventing lateral slippage can be further promoted.
  • the actuator such as hydraulic motors and electromagnetic solenoids can be used as the actuator.
  • an electric motor preferably a stepping motor
  • complicated control is possible with a simple structure. It becomes possible. Accordingly, the fourth invention is a preferred embodiment in the present invention.
  • the clutch mechanism when the operator removes his / her foot from the speed change pedal, the clutch mechanism is turned off and the power transmission to the running wheel is cut off, and at the same time the brake mechanism is turned on and the running wheel stops rotating.
  • the traveling machine body is automatically and reliably stopped, and the operability of the rice transplanter can be improved.
  • FIG. 5 is an enlarged sectional view taken along line VV in FIG. 4.
  • FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 4. It is a principal part enlarged view of FIG. It is a figure which shows the relationship between the moving amount of a speed-change pedal, and the change rate of travel speed.
  • reference numeral 1 denotes a passenger type rice transplanter.
  • This riding type rice transplanter 1 is composed of a traveling machine body 2 and a conventionally known multi-row planting seedling planting device 3 that is mounted on the rear part so as to be movable up and down.
  • the traveling machine body 2 includes a pair of left and right front wheels 5 Similarly, a vehicle body frame 4 supported by a pair of left and right rear wheels 6 is provided.
  • the vehicle body frame 4 in the traveling machine body 2 is equipped with an engine 7 and a traveling speed change transmission 8 for appropriately transmitting power from the engine 7 to the front and rear wheels 5 and 6.
  • the traveling machine body 2 travels forward in the direction of arrow A by four-wheel drive.
  • a driving operation unit 9 including a steering handle 10 and a seat 11 is provided on the upper surface of the vehicle body frame 4 in the traveling machine body 2, and the right side of the steering handle 10 on the floor surface of the driving operation unit 9 is provided.
  • the part is provided with a stepping-type shift pedal (accelerator pedal) 12 in the forward direction and a stepping-type brake pedal 13 in the same direction in the left-right direction.
  • These pedals 12 and 13 are rotatably attached to the vehicle body frame 4.
  • the traveling transmission gear 8 includes an HST (hydrostatic) continuously variable transmission mechanism 14.
  • the HST continuously variable transmission mechanism 14 includes a variable hydraulic pump 15 driven by power from the engine 7 and a hydraulic motor 16 driven by hydraulic pressure from the hydraulic pump 15. By changing the inclination angle of the swash plate 15a in the hydraulic pump 15 with the speed change lever 17, the travel speed of the travel machine body 2 is continuously variable.
  • the speed change lever 17 is connected to spring means for biasing the speed change lever 17 in the deceleration direction.
  • the travel transmission mission 8 is provided with a clutch mechanism 18 for turning on / off (interrupting) power transmission to the wheels 5 and 6, and A brake mechanism 19 for braking the wheels 5 and 6 is provided.
  • the traveling transmission mission 8 is provided with a rotary operation shaft 20 for the brake mechanism 19, and the clutch mechanism 18 is connected to one operating member 21 fixed to the operation shaft 20 by a wire or the like. ing.
  • the brake mechanism 19 is on and the clutch mechanism 18 is off.
  • the brake mechanism 19 is OFF and the clutch mechanism 18 is ON.
  • the one actuating member 21 or the operation shaft 20 is provided with spring means (not shown) for urging the actuating member 21 to rotate in the direction of the arrow B.
  • a detecting means 24 for detecting a stepping operation and a stepping release operation (described later in detail) of the speed change pedal 12 is provided, while a fan gear 25 is provided at the left end of the speed change operating shaft 22. Is fixed.
  • an arm 26 is fixed to the speed change operation shaft 22, and a front end of a speed change rod rod 27 extending rearward is pivotally attached to the tip of the arm 26. Further, a long groove hole 27a having an appropriate length L is formed at the rear end of the speed change rod rod 27. The long groove hole 27a is provided at the front end of the speed change lever 17 in the continuously variable transmission mechanism 14 of the traveling speed change transmission 8. The pin 17a is slidably fitted and engaged.
  • the continuously variable transmission mechanism 14 is in a state where little power is transmitted when the speed change rod shaft 27 does not rotate and the speed change rod rod 27 does not move rearward.
  • the speed change rod rod 27 is rotated in the counterclockwise direction indicated by the arrow C in FIG. 6 and moves backward, the amount of movement exceeds the length L of the long groove hole 27a.
  • the traveling speed is increased steplessly in proportion to the backward movement.
  • the continuously variable speed change mechanism 14 turns to deceleration, and the running speed is stepless. Will slow down.
  • the fan gear 25 meshes with a pinion 29 that is rotationally driven by an electric actuator (for example, an electric motor) 28. Therefore, when the sector gear 25 is rotated forward and backward by the electric actuator 28, the speed change operation shaft 22 rotates forward and backward in the counterclockwise direction indicated by the arrow C and the clockwise direction indicated by the arrow D.
  • an electric actuator for example, an electric motor
  • a shift pedal shaft 30 extending in parallel with the shift operation shaft 22 is rotatably supported at a right end portion of the shift operation shaft 22 (the shift pedal shaft 30 is attached to the vehicle body frame 4). .)
  • the speed change pedal shaft 30 is interlocked with the speed change pedal 12 via an interlock mechanism 31 so that the speed change pedal 12 is tilted against the spring means from a posture generated by a spring means (not shown).
  • the pedal is depressed (when the pedal is depressed)
  • the shift pedal shaft 30 rotates in the clockwise direction indicated by an arrow E.
  • the shift pedal shaft 30 rotates in the counterclockwise direction indicated by the arrow F.
  • the detection means 24 disposed at the right end of the speed change operation shaft 22 includes a box 24a fixed to the speed change operation shaft 22, a rotor 24b rotatably provided on the box 24a, and a radially outward position from the rotor 24b.
  • a bifurcated arm 24c protruding in the direction and a pair of switches 24d and 24e provided on both sides of the bifurcated arm 24c in the box 24a are provided.
  • the bifurcated arm 24c is engaged with the tip of an arm 32 projecting from the speed change pedal shaft 30. For this reason, the bifurcated arm 24c and the rotor 24b are moved by an arrow in the stepping operation on the speed change pedal 12. It rotates in the counterclockwise direction indicated by E ′.
  • one switch 24d is switched from OFF to ON.
  • the bifurcated arm 24c and the rotor 24b rotate clockwise as indicated by the arrow F ', and the other switch 24e is turned from OFF to ON. Switch to.
  • reference numeral 33 denotes a controller.
  • the controller 33 uses the signals in the switches 24d and 24e of the detection means 24 as input signals, changes the input signals as appropriate, and outputs instructions to the electric actuator 28.
  • the switches 24d When one switch 24d of 24e is turned from OFF to ON, the electric actuator 28 is driven and the speed change operating shaft 22 rotates in the direction of arrow C via the sector gear 25, whereby the speed change rod rod 27 However, it moves backward as shown by the solid line arrow G in FIGS. Conversely, when the other switch 24e of the switches 24d and 24e is turned from OFF to ON, the speed change rod rod 27 moves forward as indicated by a dotted arrow H in FIGS.
  • a receiving piece 21a is integrally provided on one operating member 21 for both the clutch mechanism 18 and the brake mechanism 19, and the speed change rod rod 27 is slidable on the receiving piece 21a. It penetrates.
  • a stopper piece 27b that contacts the receiving piece 21a is provided at the rear end of the speed change rod rod 27. For this reason, when the speed change rod 22 does not rotate and the speed change rod rod 27 does not move backward (that is, when the speed change pedal 12 is not depressed), the one actuating member 21 is The stopper piece 27b is held in a stopped state in which the brake mechanism 19 is turned on and the clutch mechanism 18 is turned off.
  • the brake pedal 13 provided side by side with the shift pedal 12 is connected to a brake shaft 34 that is rotatably supported on the vehicle body frame 4, and the brake shaft 34 rotates when the brake pedal 13 is depressed.
  • An arm 35 is fixed to the brake shaft 34, and a brake rod rod 36 extending rearward is connected to the tip of the arm 35.
  • a locking piece 21b provided on the one actuating member 21 is slidably penetrated, and a stopper 36a is provided at the rear end of the brake rod rod 36. Therefore, in a state where the brake pedal 13 is not depressed, the one actuating member 21 can freely operate from a stopped state (position indicated by a solid line in FIG.
  • the one actuating member 21 is in a stop state, for example, shown by a solid line in FIG. 7, and the power transmission cutoff state in which the brake mechanism 19 is ON and the clutch mechanism 18 is OFF. Therefore, the traveling machine body 2 does not travel.
  • the shift pedal shaft 30 first rotates in the direction of arrow E in FIG. 5, and the bifurcated arm 24c and the rotor 24b in the detection means 24 are moved to the arrow based on this rotation.
  • E ′ By rotating in the direction of E ′, one of the switches 24d and 24e in the detecting means 24 is switched from OFF to ON, so that the electric actuator 28 is instructed by the controller 33.
  • the speed change operation shaft 22 is rotated in the direction of arrow C.
  • the speed change rod rod 27 starts to move backward as indicated by a solid arrow G in FIG.
  • the rearward movement of the speed change rod rod 27 is continued by continuing the depressing operation of the speed change pedal 12, and when the rearward movement exceeds the length L of the long groove hole 27a, the speed change lever 17 rotates rearward.
  • the HST type continuously variable transmission mechanism 14 operates in a power transmission state. As a result, the traveling machine body 2 starts traveling.
  • the traveling speed of the traveling machine body 2 is proportional to the amount of further rearward movement of the speed change rod rod 27 (that is, the amount of depression of the speed change pedal 12).
  • the controller 33 continues the rotation of the speed change operation shaft 22 in the direction of the arrow C by the electric actuator 28, so that one switch 24d in the detecting means 24 is turned on. From the ON state to the OFF state, the instruction of the controller 33 stops the rotation of the speed change operation shaft 22 in the direction of the arrow C by the electric actuator 28. As a result, the speed change rod rod 27 is moved backward. Stop at that position. Accordingly, the traveling speed of the traveling machine body 2 is maintained at a speed corresponding to the depression position of the shift pedal 12.
  • the forward movement of the speed change rod rod 27 causes the speed change lever 17 to rotate rearward and the HST type continuously variable speed change mechanism 14 to operate in a decelerating state. Accordingly, the travel speed of the traveling machine body 2 is reduced.
  • the start and acceleration by depressing the shift pedal 12 is operated by the actuator 28 to accelerate the traveling shift transmission 8 via the detection means 24 for detecting the depression of the shift pedal 12 and the controller 33.
  • decelerating and stopping by depressing the shift pedal 12 is also performed by operating the traveling shift transmission 8 to decelerate with the actuator 28 via the detecting means 24 and the controller 33. Since the detecting means 24 and the actuator 28 exist between the speed change pedal 12 and the travel speed change transmission 8, sudden acceleration or sudden start by sudden depression of the speed change pedal 12 or sudden return of the speed change pedal 12 is possible. It is possible to avoid sudden deceleration or sudden stop.
  • the depressing operation force of the shifting pedal 12 can be reduced, and further, when the shifting pedal 12 is operated, the shifting of the traveling transmission mission 8 is performed. It can be avoided that the load and impact of the lever 17 are transmitted to the shift pedal 12 as so-called kickback.
  • FIG. 8 is a diagram illustrating the relationship between the operation amount S of the shift pedal 12 and the shift amount W of the traveling speed, and the relationship is a linear straight line X indicated by a solid line or a downward convexity indicated by a two-dot chain line. Or a quadratic curve Y.
  • the unit shift amount ⁇ W of the traveling speed with respect to the unit operation amount ⁇ S of the shift pedal 12 is set to be linearly proportional over the entire region, Under the relationship of the downward convex quadratic curve Y shown, the unit shift amount of the traveling speed with respect to the unit operation amount ⁇ S of the shift pedal 12 is smaller than the relationship of X over the entire region, but the depression operation of the shift pedal 12 is performed. It is set to be the smallest and gradually increase in the initial stage.
  • the amount by which the shift pedal 12 is depressed can be calculated by measuring the time during which one switch 24d of the detecting means 24 is ON. Further, the return displacement amount of the shift pedal 12 can be calculated by measuring the time during which the other switch 24e in the detecting means 24 is ON.
  • the detecting unit 24 may have a sensor function for directly detecting the amount of displacement (displacement angle) of the shift pedal 12.
  • the relationship between X and Y can also be realized by a cam.
  • the speed increase rate of the traveling speed becomes moderate at the initial stage of the depressing operation of the shift pedal 12 (when starting), and at the end of the depressing operation of the shift pedal 12 (when stopping). Since the speed reduction rate of the running speed can be made gentle, the effects of preventing deep planting at the start and preventing lateral slippage at the stop are further promoted.
  • the primary straight line X is not limited to the primary straight line X or the downward convex quadratic curve Y.
  • the shape of the downward convex quadratic curve Y can be changed, or can be made an upward convex quadratic curve, and when the shift pedal 12 is depressed (starting), the depression is released. It can be set to be a linear or quadratic curve that differs depending on the operation (when stopped).
  • the drive rotational speed of the engine 7 is automatically changed according to the speed change operation of the traveling speed change mission 8, and this point is illustrated in FIG.
  • the sector gear 25 is provided with a cam groove 37 extending in the circumferential direction.
  • the cam groove 37 has a start end (one end) 37 a that is rotated by the sector gear 25.
  • the terminal (the other end) 37b is located at a portion having a small radius R2 from the speed change operation shaft 22, and the cam groove 37 is located at a position having a large radius R1 from the speed change operation shaft 22 as a center.
  • the sector gear 25 is inclined so as to gradually approach the center of rotation toward the direction of rotation of the sector gear 25 in the direction of arrow C (that is, the direction of rotation that increases the traveling speed).
  • the cam arm 37 is slidably engaged with the tip of a first arm 39 projecting from a horizontal shaft 38 rotatably supported on the vehicle body frame 4, while being fixed to the horizontal shaft 38.
  • the two arms 40 and the accelerator lever 7a of the engine 7 are connected by a wire 41 or the like.
  • the rotational speed of the engine 7 can be arbitrarily changed by manually rotating the accelerator lever 7a.
  • the present invention can be applied to a riding type rice transplanter to improve its usefulness, and therefore has industrial applicability.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Transplanting Machines (AREA)
  • Transportation (AREA)
  • Braking Elements And Transmission Devices (AREA)

Abstract

A riding - type rice transplanter comprises a traveling frame (2) having traveling wheels (5, 6) driven by an engine (7), a seedling planting device (3) installed at the rear of the traveling frame (2), a traveling transmission (8(14)) for the traveling wheels (5, 6), and a gear shift pedal (12) installed at the operation control part (9) of the traveling frame. The riding - type rice transplanter further comprises an actuator (28) for shift-operating the traveling transmission and a detection means (24) for detecting the depressing operation and the releasing operation of the gear shift pedal (12). The actuator (28) operates the traveling transmission (8(14)) to an increase in speed when the detection device (24) detects the depressing operation of the gear shift pedal, and operates the traveling transmission (8(14)) to a decrease in speed when the detection means detects the releasing operation of the transmission pedal (12).

Description

乗用型田植機Ride type rice transplanter
 本発明は、走行機体の後部又は前部に苗植え装置を装着して成る乗用型田植機に関する。より詳しくは、走行速度の変更が足踏み式の変速ペダルで行われる乗用型田植機に関する。 The present invention relates to a riding type rice transplanter in which a seedling planting device is attached to the rear or front of a traveling machine body. More specifically, the present invention relates to a riding type rice transplanter in which travel speed is changed with a step-type shift pedal.
 乗用車やトラックのような自動車の場合は車速の変更は一般に燃料噴射量の調節によって行われるが、田植機のエンジンは走行のみでなく苗植え装置の駆動も行うため、エンジンの出力はあまり変化させるのは好ましくなく、そこで、走行変速ミッションを制御することで車速を変更することが行われている。 In the case of automobiles such as passenger cars and trucks, the vehicle speed is generally changed by adjusting the fuel injection amount, but the engine of the rice transplanter not only runs but also drives the seedling planting device, so the engine output changes a lot. Therefore, the vehicle speed is changed by controlling the traveling speed change mission.
 その一例として特許文献1には、走行変速ミッションにおける変速レバーと、運転操作部に設けた足踏み式の変速ペダルとの間を、ロッド等にて機械的に連動連結することが開示されている。この特許文献では、変速ペダルを踏み込むと変速ミッションは増速状態となり、変速ペダルの踏み込みを解除すると(変速ペダルが戻り移動すると)変速ミッションは減速状態になる。
特開2003-220933号公報
As an example, Patent Document 1 discloses mechanically interlocking and connecting a transmission lever in a traveling transmission transmission and a stepping type transmission pedal provided in a driving operation unit with a rod or the like. In this patent document, when the shift pedal is depressed, the shift mission is in an accelerated state, and when the shift pedal is released (when the shift pedal returns and moves), the shift mission is in a decelerated state.
JP 2003-220933 A
 特許文献1のように足踏み式の変速ペダルで車速の変更を行うと、両手は空いているため、手動式レバーで車速を調節する場合に比べて、ハンドル操作や各種レバー類の操作が容易であり、このため安全性に優れている。 When the vehicle speed is changed with a foot-operated shift pedal as in Patent Document 1, both hands are vacant, making it easier to operate the handle and various levers than when adjusting the vehicle speed with a manual lever. Yes, it is excellent in safety.
 しかし、特許文献1は、走行変速ミッションの変速レバーに変速ペダルがロッド等にて機械的に連結されているため、変速ペダルの動きが走行変速ミッションに直ちに伝達されて、変速ペダルの踏み込みによって走行機体が急発進又は急加速したり、変速ペダルの踏み込み解除によって走行機体が急減速又は急停止したりする問題が懸念されていた。つまり、変速ペダルの動きに対する走行変速ミッションの動きの応答追従性が過敏すぎることが懸念されていた。 However, in Patent Document 1, since the shift pedal is mechanically connected to the shift lever of the traveling shift mission by a rod or the like, the movement of the shift pedal is immediately transmitted to the traveling shift mission, and the vehicle travels by depressing the shift pedal. There has been a concern that the aircraft may suddenly start or accelerate, or the traveling aircraft may suddenly decelerate or stop suddenly when the shift pedal is depressed. That is, there is a concern that the response follow-up of the movement of the traveling transmission mission with respect to the movement of the shift pedal is too sensitive.
 そして、走行機体が急発進又は急加速すると、走行機体の前部が浮き上がって後部の苗植え装置が下がることにより、圃場面に対する苗の植付け深さが所定値よりも深くなり過ぎるという問題を招来し、また、前記走行機体が急減速したり急停止したりすると、走行機体が横ずれして蛇行しやすくなる。 Then, when the traveling aircraft suddenly starts or accelerates, the front part of the traveling aircraft is lifted and the rear seedling planting device is lowered. In addition, when the traveling vehicle body suddenly decelerates or stops suddenly, the traveling vehicle body is shifted laterally and becomes easy to meander.
 また、特許文献1のように変速ペダルの動きをロッドで走行変速ミッションに伝える構成では、走行変速ミッションにおける変速レバーの抵抗が変速ペダルの動きに対する抵抗として作用することにより、変速ペダルの踏み込みに大きな力を要するという問題や、変速レバーを作動させるときの衝撃又は負荷が変速ペダルに伝わるいわゆるキックバック現象により、変速操作性及び運転操作フィーリングを低下させるという問題もあった。 Further, in the configuration in which the movement of the shift pedal is transmitted to the traveling shift mission by the rod as in Patent Document 1, the resistance of the shift lever in the traveling shift mission acts as a resistance to the movement of the shift pedal, which greatly increases the depression of the shift pedal. There is also a problem that a shift operability and a driving feeling are deteriorated due to a so-called kickback phenomenon in which an impact or a load when the shift lever is operated is transmitted to the shift pedal.
 本発明は、乗用型田植機におけるこれら変速に関する問題を解消することを目的としている。 The object of the present invention is to solve these problems related to gear shifting in a riding type rice transplanter.
 本願発明は多面的な広がりを持っている。このうち第1の発明は最も上位概念の構成であり、エンジンが搭載された走行機体と、前記走行機体の後部に高さ調節可能に取り付けられた苗植え装置とを有しており、前記走行機体には、座席を有する運転操作部と、走行車輪と、前記エンジンの動力を前記走行車輪に変速して伝える走行変速ミッションと、走行速度を変えるための足踏み式の変速ペダルとが設けられている、という乗用型田植機において、前記走行変速ミッションの制御が、前記ペダルの動きに応答して作動する動力式アクチェータによって行われる。 The invention of the present application has a multifaceted spread. Of these, the first invention is the configuration of the most superordinate concept, and includes a traveling machine body on which an engine is mounted, and a seedling planting device that is attached to a rear portion of the traveling machine body so that the height can be adjusted. The airframe is provided with a driving operation unit having a seat, a traveling wheel, a traveling speed change transmission that transmits the engine power to the traveling wheel by shifting, and a stepping type speed change pedal for changing the traveling speed. In the riding type rice transplanter, the traveling shift mission is controlled by a power actuator that operates in response to the movement of the pedal.
 第2の発明は、第1の発明において、前記変速ペダルの踏み込み移動と戻り移動とを電気信号として検知する検出手段が備えられており、前記検出手段と前記アクチェータとは、前記検出手段が前記変速ペダルの踏み込み移動を検知すると前記アクチェータは前記走行変速ミッションを増速し、前記検出手段が前記変速ペダルの戻り移動を検知すると前記アクチェータは前記走行変速ミッションを減速させる、というように連動している。 According to a second invention, in the first invention, there is provided detection means for detecting the stepping movement and the return movement of the shift pedal as electrical signals. The detection means and the actuator are configured so that the detection means When the shift pedal is detected, the actuator increases the travel shift mission, and when the detection means detects the shift pedal return movement, the actuator decelerates the travel shift mission. Yes.
 第3の発明は、第2の発明において、前記検出手段は変速ペダルの単位時間当たりの移動量を検知可能である一方、前記アクチェータは単位時間当たりの車速変化を調節できるように走行変速ミッションを制御可能であり、前記検出手段とアクチェータとの間には、単位時間当たりの変速ペダルの移動量と車速の変化率との関係を調節できるコントローラが介在している。 In a third aspect based on the second aspect, the detecting means can detect the amount of movement of the shift pedal per unit time, while the actuator performs a traveling shift transmission so that the change in vehicle speed per unit time can be adjusted. A controller that can be controlled and that can adjust the relationship between the shift amount of the shift pedal per unit time and the rate of change of the vehicle speed is interposed between the detection means and the actuator.
 第4の発明は、第1~第3の発明においては、前記アクチェータとして電動モータが採用されている。 In the fourth invention, in the first to third inventions, an electric motor is adopted as the actuator.
 第5の発明は、第1~第4の発明の下位概念であり、第1~第4の発明に加えて、更に、前記走行車輪の回転に抵抗を与えるブレーキ機構と、前記走行変速ミッションの出力を前記走行車輪に継断するクラッチ機構と、前記ブレーキ機構とクラッチ機構とを同時に切り換える1つの作動部材とが備えられており、前記作動部材は、前記ブレーキ機構をONで前記クラッチ機構をOFFとした走行停止状態と、前記ブレーキ機構をOFFで前記クラッチ機構をONとして走行状態とに切り換え可能である。そして、第5の発明では、前記作動部材と前記変速ペダルとは、前記変速ペダルを踏み込まない状態では前記作動部材は停止状態になり、前記変速ペダルを踏み込んだ状態では前記作動部材は走行状態になる、というように連動している。 A fifth invention is a subordinate concept of the first to fourth inventions. In addition to the first to fourth inventions, the fifth invention further includes a brake mechanism that provides resistance to rotation of the traveling wheel, and the traveling speed change mission. There is provided a clutch mechanism for switching output to the traveling wheel, and one actuating member for simultaneously switching the brake mechanism and the clutch mechanism. The actuating member turns on the brake mechanism and turns off the clutch mechanism. The travel stop state can be switched to the travel state by turning off the brake mechanism and turning on the clutch mechanism. In the fifth invention, the operating member and the shift pedal are in a stopped state when the shift pedal is not depressed, and the actuating member is in a traveling state when the shift pedal is depressed. It is interlocked so that it becomes.
 第6の発明は、第5の発明において、前記走行機体の運転操作部には足踏み式のブレーキペダルが設けられており、前記ブレーキペダルと前記作動部材とは、前記ブレーキペダルが踏み込まれると前記作動部材は前記変速ペダルとの関係を遮断して停止状態になるように連動している。 According to a sixth aspect of the present invention based on the fifth aspect, a stepping type brake pedal is provided in the driving operation unit of the traveling machine body, and the brake pedal and the actuating member are configured so that the brake pedal is depressed when the brake pedal is depressed. The actuating member is interlocked so that the relationship with the shift pedal is cut off and the operation is stopped.
 第1の発明では、変速ペダルの動きは動力式アクチェータを介して走行変速ミッションに伝達されため、走行変速ミッションが変速ペダルの動きに過敏に応答することを無くすることができる。従って、変速ペダルの踏み込みによる急発進や急加速を防止でき、その結果、走行機体が前のめりになることを防止して苗が深植え状態になることを防止又は著しく抑制できる。また、変速ペダルの戻り移動による急停止や急減速も防止できるため、走行機体の横ずれ蛇行も防止又は著しく低減できる。 In the first invention, since the movement of the shift pedal is transmitted to the traveling shift mission via the power actuator, the traveling shift mission can be prevented from responding sensitively to the shift pedal movement. Accordingly, it is possible to prevent sudden start and acceleration due to depression of the shift pedal, and as a result, it is possible to prevent or significantly suppress the seedling from being deeply planted by preventing the traveling machine body from turning forward. In addition, since sudden stop and sudden deceleration due to the return movement of the shift pedal can be prevented, lateral slippage of the traveling machine body can be prevented or significantly reduced.
 また、走行変速ミッションにおける変速レバー変速作動するときの負荷及び衝撃がいわゆるキックバックとして変速ペダルに伝わることはないから、変速操作性及び運転フィーリングを大幅に向上できる。 In addition, since the load and impact when the shift lever shift operation is performed in the traveling shift mission are not transmitted to the shift pedal as so-called kickback, the shift operability and the driving feeling can be greatly improved.
 変速ペダルの動きは機械的な機構によってアクチェータに伝えることも可能であるが、第2の発明のように電気的な検出手段を採用すると、連動部材が不要となるため設計面で有利である。 The movement of the shift pedal can be transmitted to the actuator by a mechanical mechanism. However, adopting an electrical detection means as in the second invention is advantageous in terms of design because an interlocking member is not required.
 第3の発明では、例えば、変速ペダルの踏み込み操作の初期(発進時)において増速度を緩やかにしたり、変速ペダルの踏み込み解除操作の終期(停止時)において減速度を緩やかにするといったことが可能となるため、走行機体の速度変化を滑らかにして走行機体を安定走行させることができ、その結果、深植え防止や横ずれ蛇行防止という効果を一層助長できる。 In the third aspect of the invention, for example, it is possible to moderate the acceleration at the initial stage of the shift pedal depression operation (when starting), or to moderate the deceleration at the end of the shift pedal depression operation (when stopping). Therefore, the speed change of the traveling machine body can be smoothed to allow the traveling machine body to travel stably, and as a result, the effects of preventing deep planting and preventing lateral slippage can be further promoted.
 アクチェータとしては油圧モータや電磁ソレノイドのような各種のものを使用可能であるが、第4の発明のように電動モータ(ステッピングモータが好ましい)を採用すると、簡単な構造でありながら複雑な制御が可能になる。従って、第4の発明は本願発明において好適な態様である。 Various actuators such as hydraulic motors and electromagnetic solenoids can be used as the actuator. However, when an electric motor (preferably a stepping motor) is employed as in the fourth invention, complicated control is possible with a simple structure. It becomes possible. Accordingly, the fourth invention is a preferred embodiment in the present invention.
 第5の発明によると、オペレータが変速ペダルから足を離すと、クラッチ機構がOFFになって走行車輪への動力伝達が切れると同時にブレーキ機構がONになって走行車輪の回転が停止するから、走行機体の走行停止が自動的にかつ確実に行われ、このため田植機の操作性を向上できる。 According to the fifth invention, when the operator removes his / her foot from the speed change pedal, the clutch mechanism is turned off and the power transmission to the running wheel is cut off, and at the same time the brake mechanism is turned on and the running wheel stops rotating. The traveling machine body is automatically and reliably stopped, and the operability of the rice transplanter can be improved.
 田植え作業では、安全等のために圃場で急停止せねばらならない場合がある。この点、第6の発明によると、ブレーキペダルを踏むと走行機体は変速ペダルの操作に優先して急停止するため、操作性をより向上できる。 In rice planting work, it may be necessary to stop suddenly on the field for safety. In this regard, according to the sixth aspect of the invention, when the brake pedal is depressed, the traveling machine body suddenly stops in preference to the operation of the shift pedal, so that the operability can be further improved.
本願発明を適用した乗用型田植機の側面図である。It is a side view of a riding type rice transplanter to which the present invention is applied. 図1の平面図である。It is a top view of FIG. 走行変速ミッションの概略図である。It is the schematic of a driving speed change mission. 走行操作装置を示す平面図である。It is a top view which shows a traveling operation apparatus. 図4のV-V視拡大断面図である。FIG. 5 is an enlarged sectional view taken along line VV in FIG. 4. 図4のVI-VI視拡大断面図である。FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 4. 図4の要部拡大図である。It is a principal part enlarged view of FIG. 変速ペダルの移動量と走行速度の変化率との関係を示す図である。It is a figure which shows the relationship between the moving amount of a speed-change pedal, and the change rate of travel speed.
発明を実施するための形態BEST MODE FOR CARRYING OUT THE INVENTION
 以下、本発明の実施の形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
 図1及び図2において、符号1は乗用型の田植機を示す。この乗用型田植機1は、走行機体2と、この後部に昇降可能に装着した従来周知の多条植え式の苗植え装置3とから成り、前記走行機体2は、左右一対の前車輪5と同じく左右一対の後車輪6とで支持された車体フレーム4を備えている。 1 and 2, reference numeral 1 denotes a passenger type rice transplanter. This riding type rice transplanter 1 is composed of a traveling machine body 2 and a conventionally known multi-row planting seedling planting device 3 that is mounted on the rear part so as to be movable up and down. The traveling machine body 2 includes a pair of left and right front wheels 5 Similarly, a vehicle body frame 4 supported by a pair of left and right rear wheels 6 is provided.
 また、前記走行機体2における車体フレーム4には、エンジン7が搭載されるとともに、このエンジン7から動力を適宜変速して前後の車輪5,6に伝達する走行変速ミッション8が搭載されており、これにより、前記走行機体2は四輪駆動にて矢印A方向に前進走行される。 The vehicle body frame 4 in the traveling machine body 2 is equipped with an engine 7 and a traveling speed change transmission 8 for appropriately transmitting power from the engine 7 to the front and rear wheels 5 and 6. As a result, the traveling machine body 2 travels forward in the direction of arrow A by four-wheel drive.
 更にまた、前記走行機体2における車体フレーム4の上面には、操縦ハンドル10及び座席11を備えた運転操作部9が設けられ、この運転操作部9における床面のうち前記操縦ハンドル10の右側の部位には、前方向への足踏み式の変速ペダル(アクセルペダル)12と、同じく前方向への足踏み式のブレーキペダル13とが左右に並べて設けられている。これらペダル12,13は前記車体フレーム4に回動自在に取り付けられている。 Furthermore, a driving operation unit 9 including a steering handle 10 and a seat 11 is provided on the upper surface of the vehicle body frame 4 in the traveling machine body 2, and the right side of the steering handle 10 on the floor surface of the driving operation unit 9 is provided. The part is provided with a stepping-type shift pedal (accelerator pedal) 12 in the forward direction and a stepping-type brake pedal 13 in the same direction in the left-right direction. These pedals 12 and 13 are rotatably attached to the vehicle body frame 4.
 図3に示すように、前記走行変速ミッション8はHST式(静油圧式)の無段変速機構14を備えている。このHST式無段変速機構14は、前記エンジン7からの動力で駆動される可変式の油圧ポンプ15と、この油圧ポンプ15からの油圧にて駆動される油圧モータ16とを有しており、前記油圧ポンプ15における斜板15aの傾斜角度を変速レバー17にて変更することにより、前記走行機体2の走行速度を無段変速するものである。前記変速レバー17には、図示していないが、当該変速レバー17を減速方向に付勢するばね手段が接続されている。 As shown in FIG. 3, the traveling transmission gear 8 includes an HST (hydrostatic) continuously variable transmission mechanism 14. The HST continuously variable transmission mechanism 14 includes a variable hydraulic pump 15 driven by power from the engine 7 and a hydraulic motor 16 driven by hydraulic pressure from the hydraulic pump 15. By changing the inclination angle of the swash plate 15a in the hydraulic pump 15 with the speed change lever 17, the travel speed of the travel machine body 2 is continuously variable. Although not shown, the speed change lever 17 is connected to spring means for biasing the speed change lever 17 in the deceleration direction.
 また、図3に示すように、前記走行変速ミッション8には、前記各車輪5,6への動力伝達をON・OFF(継断)するためのクラッチ機構18が備えられているとともに、前記各車輪5、6を制動するブレーキ機構19が備えられている。 In addition, as shown in FIG. 3, the travel transmission mission 8 is provided with a clutch mechanism 18 for turning on / off (interrupting) power transmission to the wheels 5 and 6, and A brake mechanism 19 for braking the wheels 5 and 6 is provided.
 更に、前記走行変速ミッション8には、前記ブレーキ機構19に対する回転式の操作軸20が設けられ、この操作軸20に固着した一つの作動部材21には、前記クラッチ機構18がワイヤー等で連結されている。これにより、前記一つの作動部材21は、図4及び図7に実線で示す位置にあるときは、前記ブレーキ機構19がONで前記クラッチ機構18がOFFの停止状態になっているが、図7に矢印Bで示す後ろ方向に回動して二点鎖線の位置になったときは、前記ブレーキ機構19がOFFで前記クラッチ機構18がONの走行状態になるように構成されている。この一つの作動部材21又は前記操作軸20には、当該作動部材21を前記矢印Bの方向に回動するように付勢するばね手段(図示せず)が設けられている。 Further, the traveling transmission mission 8 is provided with a rotary operation shaft 20 for the brake mechanism 19, and the clutch mechanism 18 is connected to one operating member 21 fixed to the operation shaft 20 by a wire or the like. ing. As a result, when the one actuating member 21 is in the position indicated by the solid line in FIGS. 4 and 7, the brake mechanism 19 is on and the clutch mechanism 18 is off. When the vehicle is rotated backward in the direction indicated by the arrow B to the position indicated by a two-dot chain line, the brake mechanism 19 is OFF and the clutch mechanism 18 is ON. The one actuating member 21 or the operation shaft 20 is provided with spring means (not shown) for urging the actuating member 21 to rotate in the direction of the arrow B.
 前記車体フレーム4のうち前部の部分には、横方向(走行機体2の正面視で左右方向)に延びる変速操作軸22が軸受け23にて回転自在に軸支されており、この変速操作軸22の右端には、前記変速ペダル12の踏み込み操作及び踏み込み解除操作(詳しくは後述する)を検出するための検出手段24が設けられている一方、前記変速操作軸22の左端には扇形歯車25が固着されている。 A shift operation shaft 22 extending in a lateral direction (left and right direction when viewed from the front of the traveling machine body 2) is rotatably supported by a bearing 23 at a front portion of the vehicle body frame 4. At the right end of the speed change pedal 12, a detecting means 24 for detecting a stepping operation and a stepping release operation (described later in detail) of the speed change pedal 12 is provided, while a fan gear 25 is provided at the left end of the speed change operating shaft 22. Is fixed.
 また、前記変速操作軸22にはアーム26が固着されており、このアーム26の先端には、後方に延びる変速ロッド杆27の前端が枢着されている。更に、この変速ロッド杆27の後端に適宜長さLの長溝孔27aが形成されており、この長溝孔27aに、前記走行変速ミッション8の無段変速機構14における変速レバー17の先端に設けたピン17aが摺動自在に嵌まり係合している。 Further, an arm 26 is fixed to the speed change operation shaft 22, and a front end of a speed change rod rod 27 extending rearward is pivotally attached to the tip of the arm 26. Further, a long groove hole 27a having an appropriate length L is formed at the rear end of the speed change rod rod 27. The long groove hole 27a is provided at the front end of the speed change lever 17 in the continuously variable transmission mechanism 14 of the traveling speed change transmission 8. The pin 17a is slidably fitted and engaged.
 従って、前記無段変速機構14は、前記変速操作軸22が回転せずに前記変速ロッド杆27が後方に移動しない状態では殆ど動力伝達しない状態にあるが、前記変速操作軸22が図5及び図6に矢印Cで示す反時計方向に回転して前記変速ロッド杆27が後方に移動するにおいてその移動量が前記長溝孔27aの長さLを越えた時点からは、前記変速ロッド杆27の後方への移動に比例して走行速度が無段階に増速される。一方、前記変速操作軸22が図5及び図6に矢印Dで示す時計方向に回転して前記変速ロッド杆27が前方に移動すると、無段変速機構14は減速に転じ、走行速度が無段階で減速される。 Therefore, the continuously variable transmission mechanism 14 is in a state where little power is transmitted when the speed change rod shaft 27 does not rotate and the speed change rod rod 27 does not move rearward. When the speed change rod rod 27 is rotated in the counterclockwise direction indicated by the arrow C in FIG. 6 and moves backward, the amount of movement exceeds the length L of the long groove hole 27a. The traveling speed is increased steplessly in proportion to the backward movement. On the other hand, when the speed change operation shaft 22 rotates in the clockwise direction indicated by the arrow D in FIGS. 5 and 6 and the speed change rod rod 27 moves forward, the continuously variable speed change mechanism 14 turns to deceleration, and the running speed is stepless. Will slow down.
 前記扇形歯車25には、電動式アクチェータ(例えば電動モータ)28にて回転駆動されるピニオン29が噛合している。従って、前記電動式アクチェータ28で扇形歯車25を正逆回転させることにより、前記変速操作軸22は、前記矢印Cで示す反時計方向と前記矢印Dで示す時計方向とに正逆回転する。 The fan gear 25 meshes with a pinion 29 that is rotationally driven by an electric actuator (for example, an electric motor) 28. Therefore, when the sector gear 25 is rotated forward and backward by the electric actuator 28, the speed change operation shaft 22 rotates forward and backward in the counterclockwise direction indicated by the arrow C and the clockwise direction indicated by the arrow D.
 前記変速操作軸22の右端の部分には、当該変速操作軸22と平行に延びる変速用ペダル軸30が回転自在に軸支されている(変速用ペダル軸30は車体フレーム4に取り付けられている。)。この変速用ペダル軸30は、連動機構31を介して前記変速ペダル12と連動するようになっており、前記変速ペダル12を、図示しないばね手段によって起きた姿勢からばね手段に抗して倒れるように踏み込むと(踏み込み操作すると)、変速ペダル軸30が矢印Eで示す時計方向に回転する。逆に、前記変速ペダル12を前記踏み込んだ位置からばね手段にて元の起きた姿勢に戻すという踏み込み解除操作が成されると、変速ペダル軸30は矢印Fで示す反時計方向に回転する。 A shift pedal shaft 30 extending in parallel with the shift operation shaft 22 is rotatably supported at a right end portion of the shift operation shaft 22 (the shift pedal shaft 30 is attached to the vehicle body frame 4). .) The speed change pedal shaft 30 is interlocked with the speed change pedal 12 via an interlock mechanism 31 so that the speed change pedal 12 is tilted against the spring means from a posture generated by a spring means (not shown). When the pedal is depressed (when the pedal is depressed), the shift pedal shaft 30 rotates in the clockwise direction indicated by an arrow E. On the contrary, when the depression release operation of returning the shift pedal 12 from the depressed position to the original position by the spring means is performed, the shift pedal shaft 30 rotates in the counterclockwise direction indicated by the arrow F.
 そして、前記変速操作軸22の右端に配置した前記検出手段24は、前記変速操作軸22に固着したボックス24aと、このボックス24aに回転自在に設けたロータ24bと、このロータ24bから半径方向外向きに突出する二股状アーム24cと、前記ボックス24a内のうち前記二股状アーム24cの両側に設けた一対のスイッチ24d,24eとを備えている。前記二股状アーム24cには、前記変速用ペダル軸30から突出するアーム32の先端が係合しており、このため、二股状アーム24c及びロータ24bは、前記変速ペダル12における踏み込み操作にて矢印E′で示す反時計方向に回動する。すると、一方のスイッチ24dがOFFからONに切り換わる。逆に、前記変速ペダル12が踏み込んだ状態から踏み込み解除操作されると、二股状アーム24c及びロータ24bは矢印F′で示すように時計方向に回動して、他方のスイッチ24eがOFFからONに切り換わる。 The detection means 24 disposed at the right end of the speed change operation shaft 22 includes a box 24a fixed to the speed change operation shaft 22, a rotor 24b rotatably provided on the box 24a, and a radially outward position from the rotor 24b. A bifurcated arm 24c protruding in the direction and a pair of switches 24d and 24e provided on both sides of the bifurcated arm 24c in the box 24a are provided. The bifurcated arm 24c is engaged with the tip of an arm 32 projecting from the speed change pedal shaft 30. For this reason, the bifurcated arm 24c and the rotor 24b are moved by an arrow in the stepping operation on the speed change pedal 12. It rotates in the counterclockwise direction indicated by E ′. Then, one switch 24d is switched from OFF to ON. On the other hand, when the shift pedal 12 is depressed from the depressed state, the bifurcated arm 24c and the rotor 24b rotate clockwise as indicated by the arrow F ', and the other switch 24e is turned from OFF to ON. Switch to.
 図4に符号33で示すのはコントローラである。このコントローラ33は、前記検出手段24の両スイッチ24d,24eにおける信号を入力信号として、この入力信号を適宜変更して前記電動式アクチェータ28に指示の出力をするものであり、前記両スイッチ24d,24eのうち一方のスイッチ24dがOFFからONになると、前記電動式アクチェータ28が駆動されて前記変速操作軸22が扇形歯車25を介して矢印Cの方向に回転することにより、前記変速ロッド杆27が、図4、図6及び図7に実線矢印Gで示すように後方に移動する。逆に、前記両スイッチ24d,24eのうち他方のスイッチ24eがOFFからONになると、図4、図6及び図7に点線矢印Hで示すように、前記変速ロッド杆27が前方に移動する。 In FIG. 4, reference numeral 33 denotes a controller. The controller 33 uses the signals in the switches 24d and 24e of the detection means 24 as input signals, changes the input signals as appropriate, and outputs instructions to the electric actuator 28. The switches 24d, When one switch 24d of 24e is turned from OFF to ON, the electric actuator 28 is driven and the speed change operating shaft 22 rotates in the direction of arrow C via the sector gear 25, whereby the speed change rod rod 27 However, it moves backward as shown by the solid line arrow G in FIGS. Conversely, when the other switch 24e of the switches 24d and 24e is turned from OFF to ON, the speed change rod rod 27 moves forward as indicated by a dotted arrow H in FIGS.
 図7に示すように、前記クラッチ機構18及びブレーキ機構19の両方に対する一つの作動部材21には受け片21aが一体に設けられ、この受け片21aには前記変速ロッド杆27が摺動自在に貫通している。この変速ロッド杆27の後端部には、前記受け片21aに当接するストッパー片27bを設けている。このため、前記変速操作軸22が回転せずに前記変速ロッド杆27が後方に移動しない状態のとき(つまり、前記変速ペダル12を踏み込み操作しない状態のとき)、前記一つの作動部材21が、前記ストッパー片27bにて、前記ブレーキ機構19をONにして前記クラッチ機構18をOFFにする停止状態に保持される。そして、前記変速ロッド杆27が後方に移動すると、前記一つの作動部材21がばね手段に抗して図7に二点鎖線で示すように矢印Bの後方に回動し、前記ブレーキ機構19はOFFで前記クラッチ機構18はONの走行状態になる。 As shown in FIG. 7, a receiving piece 21a is integrally provided on one operating member 21 for both the clutch mechanism 18 and the brake mechanism 19, and the speed change rod rod 27 is slidable on the receiving piece 21a. It penetrates. A stopper piece 27b that contacts the receiving piece 21a is provided at the rear end of the speed change rod rod 27. For this reason, when the speed change rod 22 does not rotate and the speed change rod rod 27 does not move backward (that is, when the speed change pedal 12 is not depressed), the one actuating member 21 is The stopper piece 27b is held in a stopped state in which the brake mechanism 19 is turned on and the clutch mechanism 18 is turned off. Then, when the speed change rod rod 27 moves rearward, the one actuating member 21 rotates against the spring means to the rear of the arrow B as indicated by a two-dot chain line in FIG. The clutch mechanism 18 is in an ON running state when it is OFF.
 前記変速ペダル12に並設されているブレーキペダル13は、前記車体フレーム4に回転自在に軸支したブレーキ軸34に連結されており、ブレーキペダル13の踏み込み操作にてブレーキ軸34が回転する。ブレーキ軸34にはアーム35が固着されており、このアーム35の先端に、後方に延びるブレーキロッド杆36が連結されており、図7に示すように、ブレーキロッド杆36における後端の部分が前記一つの作動部材21に設けた係止片21bに摺動自在に貫通しており、ブレーキロッド杆36の後端にストッパー36aを設けている。従って、前記ブレーキペダル13を踏み込み操作しない状態では、前記一つの作動部材21における停止状態(図7に実線で示す位置)から走行状態(図7に二点鎖線で示す位置)への自由な作動を許容しているが、前記一つの作動部材21が前記走行状態にあるとき、前記ブレーキペダル13をそのばねに抗して踏み込み操作すると、前記変速ロッド杆27にかかわらず、前記一つの作動部材21を強制的に停止状態にすることができる。換言すると、前記変速ペダル12の操作に優先して強制的に停止状態にすることができる。 The brake pedal 13 provided side by side with the shift pedal 12 is connected to a brake shaft 34 that is rotatably supported on the vehicle body frame 4, and the brake shaft 34 rotates when the brake pedal 13 is depressed. An arm 35 is fixed to the brake shaft 34, and a brake rod rod 36 extending rearward is connected to the tip of the arm 35. As shown in FIG. A locking piece 21b provided on the one actuating member 21 is slidably penetrated, and a stopper 36a is provided at the rear end of the brake rod rod 36. Therefore, in a state where the brake pedal 13 is not depressed, the one actuating member 21 can freely operate from a stopped state (position indicated by a solid line in FIG. 7) to a traveling state (position indicated by a two-dot chain line in FIG. 7). However, when the one actuating member 21 is in the traveling state, if the brake pedal 13 is depressed against its spring, the one actuating member is used regardless of the speed change rod rod 27. 21 can be forced to stop. In other words, it is possible to forcibly enter the stop state in preference to the operation of the shift pedal 12.
 以上の構成において、前記変速ペダル12を踏み込まないときには、前記変速操作軸22が回転することはなく、前記変速ロッド杆27も後方に移動しないから、前記走行変速ミッション8のHST式無段変速機構14における変速レバー17は回動しない。 In the above configuration, when the shift pedal 12 is not depressed, the shift operation shaft 22 does not rotate, and the shift rod rod 27 does not move backward. 14 does not rotate.
 しかも、前記変速ペダル12を踏み込まないときには、前記一つの作動部材21は、例えば図7に実線で示す停止状態の位置にあって、ブレーキ機構19がONでクラッチ機構18がOFFの動力伝達遮断状態になっているから、走行機体2は走行しない。 Moreover, when the shift pedal 12 is not depressed, the one actuating member 21 is in a stop state, for example, shown by a solid line in FIG. 7, and the power transmission cutoff state in which the brake mechanism 19 is ON and the clutch mechanism 18 is OFF. Therefore, the traveling machine body 2 does not travel.
 次いで、前記変速ペダル12を踏み込み操作すると、先ず、前記変速用ペダル軸30が図5の矢印Eの方向に回転し、この回転に基づいて前記検出手段24における二股状アーム24c及びロータ24bが矢印E′の方向に回転することにより、前記検出手段24における両スイッチ24d,24eのうち一方のスイッチ24dがOFFからONに切り換わり、これにより、前記電動式アクチェータ28が、前記コントローラ33の指示にて前記変速操作軸22を矢印Cの方向に回転する。これにより、前記変速ロッド杆27は例えば図6の実線矢印Gで示すように後方に移動を始める。 Next, when the shift pedal 12 is depressed, the shift pedal shaft 30 first rotates in the direction of arrow E in FIG. 5, and the bifurcated arm 24c and the rotor 24b in the detection means 24 are moved to the arrow based on this rotation. By rotating in the direction of E ′, one of the switches 24d and 24e in the detecting means 24 is switched from OFF to ON, so that the electric actuator 28 is instructed by the controller 33. The speed change operation shaft 22 is rotated in the direction of arrow C. As a result, the speed change rod rod 27 starts to move backward as indicated by a solid arrow G in FIG.
 前記変速ロッド杆27の後方への初期移動量がその後端の長溝孔27aの長さLになると、そのストッパー27bが前記一つの作動部材21における受け片21aから後方に離れることにより、前記一つの作動部材21は二点鎖線で示す走行状態に回動し、これにより、ブレーキ機構19がOFFでクラッチ機構18がONの動力伝達状態になる。 When the amount of initial movement of the speed change rod rod 27 to the rear reaches the length L of the long slot 27a at the rear end, the stopper 27b moves rearward from the receiving piece 21a of the one actuating member 21, thereby The actuating member 21 is rotated to a traveling state indicated by a two-dot chain line, whereby the brake mechanism 19 is OFF and the clutch mechanism 18 is ON.
 前記変速ロッド杆27の後方移動は、前記変速ペダル12の踏み込み操作の継続により続行され、その後方移動が前記長溝孔27aの長さLを越えた段階で前記変速レバー17は後方に回動し、前記HST式無段変速機構14が動力伝達状態に作動する。これによって走行機体2は走行を始める。走行機体2の走行速度は、前記変速ロッド杆27の更なる後方への移動量(すなわち前記変速ペダル12の踏み込み操作量)に比例して行われる。 The rearward movement of the speed change rod rod 27 is continued by continuing the depressing operation of the speed change pedal 12, and when the rearward movement exceeds the length L of the long groove hole 27a, the speed change lever 17 rotates rearward. The HST type continuously variable transmission mechanism 14 operates in a power transmission state. As a result, the traveling machine body 2 starts traveling. The traveling speed of the traveling machine body 2 is proportional to the amount of further rearward movement of the speed change rod rod 27 (that is, the amount of depression of the speed change pedal 12).
 前記変速ペダル12の踏み込み操作を止めると、前記コントローラ33により電動式アクチェータ28による前記変速操作軸22の矢印Cへの方向に回転が継続されることで、前記検出手段24における一方のスイッチ24dがONからOFFになり、前記コントローラ33の指示にて、電動式アクチェータ28による前記変速操作軸22の矢印Cへの方向に回転が停止し、その結果、前記変速ロッド杆27の後方への移動がその位置において停止する。従って、走行機体2の走行速度は、前記変速ペダル12の踏み込み位置に対応した速度に維持される。 When the depressing operation of the speed change pedal 12 is stopped, the controller 33 continues the rotation of the speed change operation shaft 22 in the direction of the arrow C by the electric actuator 28, so that one switch 24d in the detecting means 24 is turned on. From the ON state to the OFF state, the instruction of the controller 33 stops the rotation of the speed change operation shaft 22 in the direction of the arrow C by the electric actuator 28. As a result, the speed change rod rod 27 is moved backward. Stop at that position. Accordingly, the traveling speed of the traveling machine body 2 is maintained at a speed corresponding to the depression position of the shift pedal 12.
 前記変速ペダル12から足を離して当該変速ペダル12を踏み込んだ状態からばね手段にて元の起きた姿勢に戻すという踏み込み解除操作が行われると、前記変速用ペダル軸30が矢印Fの方向に回転し、この回転に基づいて前記検出手段24の二股状アーム24c及びロータ24bが矢印F′の方向に回転する。すると、前記検出手段24における両スイッチ24d、24eのうち他方のスイッチ24eがOFFからONに切り換わることにより、前記電動式アクチェータ28が、前記コントローラ33の指示にて、前記変速操作軸22を矢印Dの方向に回転させるように駆動される。その結果、前記変速ロッド杆27は点線矢印Hで示すように前方に移動する。 When a depressing release operation is performed in which the shift pedal 12 is released from the state where the shift pedal 12 is released and the shift pedal 12 is depressed to return to the original posture by the spring means, the shift pedal shaft 30 is moved in the direction of arrow F. Based on this rotation, the bifurcated arm 24c and the rotor 24b of the detecting means 24 rotate in the direction of the arrow F '. Then, when the other switch 24e of the switches 24d and 24e in the detecting means 24 is switched from OFF to ON, the electric actuator 28 moves the shift operation shaft 22 to the arrow in accordance with the instruction of the controller 33. It is driven to rotate in the direction of D. As a result, the transmission rod rod 27 moves forward as indicated by the dotted arrow H.
 この変速ロッド杆27の前方移動により、前記変速レバー17が後方に回動して前記HST式無段変速機構14は減速状態に作動し、従って、走行機体2の走行速度は減速される。 The forward movement of the speed change rod rod 27 causes the speed change lever 17 to rotate rearward and the HST type continuously variable speed change mechanism 14 to operate in a decelerating state. Accordingly, the travel speed of the traveling machine body 2 is reduced.
 変速ペダル12の踏み込み解除操作を途中で止めると、電動式アクチェータ28により前記変速操作軸22が矢印Dの方向に回転している状態でアーム32の回動が停止することにより、検出手段24における他方のスイッチ24eがONからOFFになり、すると、前記コントローラ33の指示にて、電動式アクチェータ28が停止して前記変速操作軸22の矢印Dへの方向の回転が停止する。その結果、前記変速ロッド杆27の前方への移動がその位置において停止して、走行速度が減速した状態に維持される。 When the depressing release operation of the speed change pedal 12 is stopped halfway, the rotation of the arm 32 is stopped while the speed change operation shaft 22 is rotated in the direction of the arrow D by the electric actuator 28. When the other switch 24e is turned from ON to OFF, the electric actuator 28 is stopped by the instruction of the controller 33, and the rotation of the speed change operation shaft 22 in the direction of arrow D is stopped. As a result, the forward movement of the speed change rod rod 27 is stopped at that position, and the traveling speed is maintained in a reduced state.
 前記変速ペダル12がばね手段によって元の起きた姿勢に戻り切ると、前記変速レバー17も元に戻ってHST式無段変速機構14が殆ど動力伝達しない状態になるとともに、前記一つの作動部材21は、前記ブレーキ機構19がONで前記クラッチ機構18がOFFの停止状態になり、これにより、走行機体2の走行は停止する。 When the shift pedal 12 returns to its original position by the spring means, the shift lever 17 also returns to the original state so that the HST continuously variable transmission mechanism 14 hardly transmits power, and the one actuating member 21 The brake mechanism 19 is turned on and the clutch mechanism 18 is turned off, whereby the traveling of the traveling machine body 2 is stopped.
 このように、前記変速ペダル12を踏み込み操作しての発進及び加速は、前記変速ペダル12の踏み込みを検出する検出手段24とコントローラ33とを介してアクチェータ28で走行変速ミッション8を増速に作動することによって行われる一方、前記変速ペダル12を踏み込み解除操作しての減速及び停止も、検出手段24及びコントローラ33を介してアクチェータ28で走行変速ミッション8を減速に作動させることによって行われるもので、前記変速ペダル12と走行変速ミッション8との間には検出手段24とアクチェータ28とが存在しているため、前記変速ペダル12の急踏み込みによる急加速又は急発進や変速ペダル12の急な戻しによる急減速又は急停止を回避することができる。 In this way, the start and acceleration by depressing the shift pedal 12 is operated by the actuator 28 to accelerate the traveling shift transmission 8 via the detection means 24 for detecting the depression of the shift pedal 12 and the controller 33. On the other hand, decelerating and stopping by depressing the shift pedal 12 is also performed by operating the traveling shift transmission 8 to decelerate with the actuator 28 via the detecting means 24 and the controller 33. Since the detecting means 24 and the actuator 28 exist between the speed change pedal 12 and the travel speed change transmission 8, sudden acceleration or sudden start by sudden depression of the speed change pedal 12 or sudden return of the speed change pedal 12 is possible. It is possible to avoid sudden deceleration or sudden stop.
 これに加えて、走行変速ミッション8をアクチェータ28にて変速作動するものであるため、変速ペダル12の踏み込み操作力を軽減でき、更に、変速ペダル12を操作するに際して、前記走行変速ミッション8の変速レバー17の負荷及び衝撃が前記変速ペダル12にいわゆるキックバックとして伝わることを回避できる。 In addition to this, since the shifting operation of the traveling transmission mission 8 is performed by the actuator 28, the depressing operation force of the shifting pedal 12 can be reduced, and further, when the shifting pedal 12 is operated, the shifting of the traveling transmission mission 8 is performed. It can be avoided that the load and impact of the lever 17 are transmitted to the shift pedal 12 as so-called kickback.
 ところで、本実施形態では、図8に示すように、前記コントローラ33に、前記変速ペダル12の単位操作量に対する走行速度の単位変速量を変更できる機能を備えている。すなわち、図8は、前記変速ペダル12の操作量Sと走行速度の変速量Wとの関係を示す図であり、その関係を、実線で示す一次直線Xとしたり二点鎖線で示す下向き凸の二次曲線Yとしたりすることができる。 By the way, in this embodiment, as shown in FIG. 8, the controller 33 is provided with a function capable of changing the unit shift amount of the traveling speed with respect to the unit operation amount of the shift pedal 12. That is, FIG. 8 is a diagram illustrating the relationship between the operation amount S of the shift pedal 12 and the shift amount W of the traveling speed, and the relationship is a linear straight line X indicated by a solid line or a downward convexity indicated by a two-dot chain line. Or a quadratic curve Y.
 図8の実線で示す一次直線Xの関係では、前記変速ペダル12の単位操作量ΔSに対する走行速度の単位変速量ΔWは全領域にわたって直線的に比例するように設定されており、二点鎖線で示す下向き凸の二次曲線Yの関係下では、前記変速ペダル12の単位操作量ΔSに対する走行速度の単位変速量は、全領域にわたってXの関係下よりも小さいが、前記変速ペダル12の踏み込み操作の初期において最も小さくて徐々に大きくなるように設定されている。 In the relationship of the primary straight line X shown by the solid line in FIG. 8, the unit shift amount ΔW of the traveling speed with respect to the unit operation amount ΔS of the shift pedal 12 is set to be linearly proportional over the entire region, Under the relationship of the downward convex quadratic curve Y shown, the unit shift amount of the traveling speed with respect to the unit operation amount ΔS of the shift pedal 12 is smaller than the relationship of X over the entire region, but the depression operation of the shift pedal 12 is performed. It is set to be the smallest and gradually increase in the initial stage.
 変速ペダル12の踏み込み変位量は、検出手段24における一方のスイッチ24dがONになっている時間を計測することで演算できる。また、変速ペダル12の戻り変位量は、検出手段24における他方のスイッチ24eがONになっている時間を計測することで演算できる。検出手段24に、変速ペダル12の変位量(変位角)を直接的に検知するセンサ機能を保持せしめてもよい。X、Yの関係をカムによって実現することも出来る。 The amount by which the shift pedal 12 is depressed can be calculated by measuring the time during which one switch 24d of the detecting means 24 is ON. Further, the return displacement amount of the shift pedal 12 can be calculated by measuring the time during which the other switch 24e in the detecting means 24 is ON. The detecting unit 24 may have a sensor function for directly detecting the amount of displacement (displacement angle) of the shift pedal 12. The relationship between X and Y can also be realized by a cam.
 Yの関係に設定することにより、前記変速ペダル12の踏み込み操作の初期(発進に際して)においては走行速度の増速率が緩やかになり、前記変速ペダル12の踏み込み解除操作の終期(停止に際して)に際しては走行速度の減速率を緩やかにすることができるから、発進に際しての深植え防止と停止に際しての横ずれ蛇行防止との効果が一層助長される。 By setting the relationship of Y, the speed increase rate of the traveling speed becomes moderate at the initial stage of the depressing operation of the shift pedal 12 (when starting), and at the end of the depressing operation of the shift pedal 12 (when stopping). Since the speed reduction rate of the running speed can be made gentle, the effects of preventing deep planting at the start and preventing lateral slippage at the stop are further promoted.
 なお、前記コントローラ33による前記変速ペダル12における操作量Sと走行速度の変速量Wとの関係設定に際しては、前記一次直線X又は下向き凸の二次曲線Yにすること以外に、前記一次直線Xの傾きを変えたり、前記下向き凸の二次曲線Yの形状を変えたり、上向き凸の二次曲線にしたりすることができるほか、前記変速ペダル12の踏み込み操作のとき(発進時)と踏み込み解除操作のとき(停止時)とで異なる一次直線又は二次曲線となるように設定することができる。 In setting the relationship between the operation amount S of the shift pedal 12 and the speed change amount W of the traveling speed by the controller 33, the primary straight line X is not limited to the primary straight line X or the downward convex quadratic curve Y. Can be changed, the shape of the downward convex quadratic curve Y can be changed, or can be made an upward convex quadratic curve, and when the shift pedal 12 is depressed (starting), the depression is released. It can be set to be a linear or quadratic curve that differs depending on the operation (when stopped).
 本実施形態では、前記エンジン7の駆動回転数が前記走行変速ミッション8の変速作動に応じて自動的に変更される構成になっており、この点は図6に例示されている。 In the present embodiment, the drive rotational speed of the engine 7 is automatically changed according to the speed change operation of the traveling speed change mission 8, and this point is illustrated in FIG.
 すなわち、まず、図6に示すように、前記扇形歯車25には円周方向に延びるカム溝37を設けているが、このカム溝37は、その始端(一端)37aが前記扇形歯車25の回転中心である前記変速操作軸22から大きい半径R1の部位に位置して、終端(他端)37bが前記変速操作軸22から小さい半径R2の部位に位置しており、従って、カム溝37は、前記扇形歯車25の矢印Cへの回転方向(つまり、走行速度を増速する回転方向)に向かって次第に回転中心に近付くように傾斜した形態になっている。 That is, first, as shown in FIG. 6, the sector gear 25 is provided with a cam groove 37 extending in the circumferential direction. The cam groove 37 has a start end (one end) 37 a that is rotated by the sector gear 25. The terminal (the other end) 37b is located at a portion having a small radius R2 from the speed change operation shaft 22, and the cam groove 37 is located at a position having a large radius R1 from the speed change operation shaft 22 as a center. The sector gear 25 is inclined so as to gradually approach the center of rotation toward the direction of rotation of the sector gear 25 in the direction of arrow C (that is, the direction of rotation that increases the traveling speed).
 そして、カム溝37に、前記車体フレーム4に回転自在に軸支した横軸38から突出する第1アーム39の先端が摺動自在に係合している一方、前記横軸38に固着した第2アーム40と前記エンジン7のアクセルレバー7aとがワイヤー41等で連結されている。 The cam arm 37 is slidably engaged with the tip of a first arm 39 projecting from a horizontal shaft 38 rotatably supported on the vehicle body frame 4, while being fixed to the horizontal shaft 38. The two arms 40 and the accelerator lever 7a of the engine 7 are connected by a wire 41 or the like.
 この構成において、前記扇形歯車25が矢印Cの方向(走行速度を増速させる方向)に回転すると、前記カム溝37にて、前記アクセルレバー7aがその戻しばね手段7bに抗して矢印Jで示す方向に回動するから、前記エンジン7の回転数はアイドル回転から走行速度の増速に比例して自動的に増速される。 In this configuration, when the sector gear 25 rotates in the direction of arrow C (in the direction of increasing the traveling speed), the accelerator lever 7a is opposed to its return spring means 7b in the cam groove 37 by the arrow J. Since the engine 7 rotates in the direction shown in the figure, the rotational speed of the engine 7 is automatically increased in proportion to the increase in traveling speed from idle rotation.
 一方、前記扇形歯車25が矢印Dの方向(走行速度を減速させる方向)に回転すると、前記カム溝37のガイド作用で、前記アクセルレバー7aがその戻しばね手段7bにて矢印Kで示す方向に戻り回動し、このため、前記エンジン7の回転数は走行速度の減速に比例して自動的に減速され、走行が停止し切るとアイドル回転になる。 On the other hand, when the sector gear 25 rotates in the direction of the arrow D (direction in which the traveling speed is reduced), the accelerator lever 7a is moved in the direction indicated by the arrow K by the return spring means 7b by the guide action of the cam groove 37. Accordingly, the rotational speed of the engine 7 is automatically decelerated in proportion to the deceleration of the traveling speed, and becomes idle when the traveling is stopped.
 なお、前記エンジン7の回転数は、前記アクセルレバー7aを手動にて回動操作することによっても、任意に変更できるように構成されていることは勿論である。 Of course, the rotational speed of the engine 7 can be arbitrarily changed by manually rotating the accelerator lever 7a.
 本願発明は乗用型田植機に適用してその有用性を向上できるものであり、従って、産業上の利用可能性を有している。 The present invention can be applied to a riding type rice transplanter to improve its usefulness, and therefore has industrial applicability.
符号の説明Explanation of symbols
   1 乗用型田植機
   2 走行機体
   3 苗植え装置
   4 車体フレーム
   5 前車輪(走行車輪)
   6 後車輪(走行車輪)
   7 エンジン
   8 走行変速ミッション
   9 運転操作部
  12 変速ペダル
  13 ブレーキペダル
  14 走行変速ミッションの中枢としてのHST式無段変速機構
  17 変速レバー
  18 クラック機構
  19 ブレーキ機構
  21 作動部材
  22 変速操作軸
  24 検出手段(センサ)
  25 変速用扇形歯車
  27 変速ロッド杆
  28 アクチェータ(電動モータ)
  33 コントローラ
DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter 2 Traveling machine body 3 Seedling planting device 4 Body frame 5 Front wheel (traveling wheel)
6 Rear wheels (traveling wheels)
DESCRIPTION OF SYMBOLS 7 Engine 8 Traveling transmission mission 9 Driving | operation operation part 12 Shift pedal 13 Brake pedal 14 HST type continuously variable transmission mechanism as center of traveling transmission mission 17 Shifting lever 18 Crack mechanism 19 Brake mechanism 21 Actuating member 22 Shifting operation shaft 24 Detection means ( Sensor)
25 Gear fan for speed change 27 Speed change rod 28 28 Actuator (electric motor)
33 controller

Claims (6)

  1.  エンジンが搭載された走行機体と、前記走行機体の後部又は前部に高さ調節可能に取り付けられた苗植え装置とを有しており、前記走行機体には、座席を有する運転操作部と、走行車輪と、前記エンジンの動力を前記走行車輪に変速して伝える走行変速ミッションと、走行速度を変えるための足踏み式の変速ペダルとが設けられている、
    という乗用型田植機であって、
     前記走行変速ミッションの制御が、前記ペダルの動きに応答して作動する動力式アクチェータによって行われる、
    乗用型田植機。
    A traveling machine body on which an engine is mounted, and a seedling planting device attached to a rear part or a front part of the traveling machine body so as to be height-adjustable; the traveling machine body includes a driving operation unit having a seat; A traveling wheel, a traveling speed change transmission that transmits the engine power to the traveling wheel by shifting, and a stepped shift pedal for changing the traveling speed are provided,
    A passenger rice transplanter called
    Control of the traveling speed change mission is performed by a powered actuator that operates in response to movement of the pedal.
    Riding type rice transplanter.
  2.  前記変速ペダルの踏み込み移動と戻り移動とを電気信号として検知する検出手段が備えられており、前記検出手段と前記アクチェータとは、前記検出手段が前記変速ペダルの踏み込み移動を検知すると前記アクチェータは前記走行変速ミッションを増速し、前記検出手段が前記変速ペダルの戻り移動を検知すると前記アクチェータは前記走行変速ミッションを減速させる、というように連動している、
    請求項1に記載した乗用型田植機。
    Detection means for detecting depression movement and return movement of the shift pedal as electrical signals is provided, and the detection means and the actuator are configured to detect the depression movement of the transmission pedal when the detection means detects the depression movement of the shift pedal. The travel gearshift mission is increased, and when the detecting means detects the return movement of the shift pedal, the actuator is interlocked so as to decelerate the travel gearshift mission,
    The riding type rice transplanter according to claim 1.
  3.  前記検出手段は変速ペダルの単位時間当たりの移動量を検知可能である一方、前記アクチェータは単位時間当たりの車速変化を調節できるように走行変速ミッションを制御可能であり、前記検出手段とアクチェータとの間には、単位時間当たりの変速ペダルの移動量と車速の変化率との関係を調節できるコントローラが介在している、
    請求項2に記載した乗用型田植機。
    While the detection means can detect the amount of movement of the shift pedal per unit time, the actuator can control a traveling shift mission so that the change in vehicle speed per unit time can be adjusted, and between the detection means and the actuator In between, there is a controller that can adjust the relationship between the shift pedal movement amount per unit time and the rate of change of vehicle speed,
    The riding type rice transplanter according to claim 2.
  4.  前記アクチェータは電動モータである、
    請求項1~3のうちのいずれかに記載した乗用型田植機。
    The actuator is an electric motor.
    The riding type rice transplanter according to any one of claims 1 to 3.
  5.  更に、前記走行車輪の回転に抵抗を与えるブレーキ機構と、前記走行変速ミッションの出力を前記走行車輪に継断するクラッチ機構と、前記ブレーキ機構とクラッチ機構とを同時に切り換える1つの作動部材とが備えられており、前記作動部材は、前記ブレーキ機構をONで前記クラッチ機構をOFFとした走行停止状態と、前記ブレーキ機構をOFFで前記クラッチ機構をONとして走行状態とに切り換え可能であり、
     かつ、前記作動部材と前記変速ペダルとは、前記変速ペダルを踏み込まない状態では前記作動部材は停止状態になり、前記変速ペダルを踏み込んだ状態では前記作動部材は走行状態になる、というように連動している、
    請求項1~4のうちのいずれかに記載した乗用型田植機。
    And a brake mechanism that provides resistance to rotation of the traveling wheel, a clutch mechanism that relays the output of the traveling transmission mission to the traveling wheel, and a single actuating member that simultaneously switches between the brake mechanism and the clutch mechanism. The actuating member is switchable between a running stop state in which the brake mechanism is turned on and the clutch mechanism is turned off, and a running state in which the brake mechanism is turned off and the clutch mechanism is turned on.
    The actuating member and the shift pedal are linked such that the actuating member is in a stopped state when the shift pedal is not depressed, and the actuating member is in a traveling state when the shift pedal is depressed. is doing,
    The riding type rice transplanter according to any one of claims 1 to 4.
  6.  前記走行機体の運転操作部には足踏み式のブレーキペダルが設けられており、前記ブレーキペダルと前記作動部材とは、前記ブレーキペダルが踏み込まれると前記作動部材は前記変速ペダルとの関係を遮断して停止状態になるように連動している、
    請求項5に記載した乗用型田植機。
    A stepping type brake pedal is provided in a driving operation portion of the traveling machine body. When the brake pedal is depressed, the operation member cuts off a relationship with the shift pedal. Are linked so that
    The riding type rice transplanter according to claim 5.
PCT/JP2009/051982 2008-03-05 2009-02-05 Riding - type rice transplanter WO2009110280A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200980107746XA CN101960182A (en) 2008-03-05 2009-02-05 Riding - type rice transplanter
KR1020167002185A KR101716724B1 (en) 2008-03-05 2009-02-05 Riding-type rice transplanter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008055169A JP5497268B2 (en) 2008-03-05 2008-03-05 Traveling operation device for riding rice transplanter
JP2008-055169 2008-03-05

Publications (1)

Publication Number Publication Date
WO2009110280A1 true WO2009110280A1 (en) 2009-09-11

Family

ID=41055841

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/051982 WO2009110280A1 (en) 2008-03-05 2009-02-05 Riding - type rice transplanter

Country Status (4)

Country Link
JP (1) JP5497268B2 (en)
KR (2) KR101716724B1 (en)
CN (3) CN104604398A (en)
WO (1) WO2009110280A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011064275A (en) * 2009-09-17 2011-03-31 Yanmar Co Ltd Riding type farm working machine
JP2011196399A (en) * 2010-03-17 2011-10-06 Yanmar Co Ltd Riding-type agricultural work machine
JP2011194923A (en) * 2010-03-17 2011-10-06 Yanmar Co Ltd Riding farm working machine
WO2012036280A1 (en) * 2010-09-17 2012-03-22 ヤンマー株式会社 Rice transplanter
JP2012062873A (en) * 2010-09-17 2012-03-29 Yanmar Co Ltd Rice transplanter
JP2012082777A (en) * 2010-10-13 2012-04-26 Yanmar Co Ltd Rice transplanter

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5724189B2 (en) * 2010-03-08 2015-05-27 株式会社ニコン Variable magnification optical system, optical device
JP6438368B2 (en) * 2015-09-18 2018-12-12 ヤンマー株式会社 Work vehicle
CN105340439B (en) * 2015-11-25 2018-02-02 云南烟草机械有限责任公司 A kind of multifunction caterpillar tobacco planting manages Operation Van
KR101956598B1 (en) * 2018-02-05 2019-06-24 동양물산기업 주식회사 Braking device for agricultural machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0751983B2 (en) * 1989-03-23 1995-06-05 株式会社クボタ Rice transplanter vehicle speed control device
JPH11315911A (en) * 1999-02-04 1999-11-16 Yanmar Agricult Equip Co Ltd Mobile farm machine
JP2004019890A (en) * 2002-06-20 2004-01-22 Yanmar Agricult Equip Co Ltd Working vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4116199B2 (en) * 1999-06-30 2008-07-09 ヤンマー農機株式会社 Rice transplanter
JP2001275416A (en) * 2000-03-30 2001-10-09 Kubota Corp Paddy working machine
JP4106217B2 (en) 2002-01-28 2008-06-25 ヤンマー農機株式会社 Brake and clutch operation mechanism
JP4095357B2 (en) * 2002-06-20 2008-06-04 ヤンマー農機株式会社 Rice transplanter
JP4142473B2 (en) 2003-01-10 2008-09-03 ヤンマー農機株式会社 Travel speed holding mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0751983B2 (en) * 1989-03-23 1995-06-05 株式会社クボタ Rice transplanter vehicle speed control device
JPH11315911A (en) * 1999-02-04 1999-11-16 Yanmar Agricult Equip Co Ltd Mobile farm machine
JP2004019890A (en) * 2002-06-20 2004-01-22 Yanmar Agricult Equip Co Ltd Working vehicle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011064275A (en) * 2009-09-17 2011-03-31 Yanmar Co Ltd Riding type farm working machine
JP2011196399A (en) * 2010-03-17 2011-10-06 Yanmar Co Ltd Riding-type agricultural work machine
JP2011194923A (en) * 2010-03-17 2011-10-06 Yanmar Co Ltd Riding farm working machine
WO2012036280A1 (en) * 2010-09-17 2012-03-22 ヤンマー株式会社 Rice transplanter
JP2012062873A (en) * 2010-09-17 2012-03-29 Yanmar Co Ltd Rice transplanter
CN103109060A (en) * 2010-09-17 2013-05-15 洋马株式会社 Rice transplanter
CN103109060B (en) * 2010-09-17 2016-06-15 洋马株式会社 Rice transplanter
JP2012082777A (en) * 2010-10-13 2012-04-26 Yanmar Co Ltd Rice transplanter

Also Published As

Publication number Publication date
JP2009210063A (en) 2009-09-17
JP5497268B2 (en) 2014-05-21
CN101960182A (en) 2011-01-26
CN104110492A (en) 2014-10-22
CN104604398A (en) 2015-05-13
KR101716724B1 (en) 2017-03-15
KR20160015401A (en) 2016-02-12
KR101590434B1 (en) 2016-02-18
KR20100124722A (en) 2010-11-29

Similar Documents

Publication Publication Date Title
WO2009110280A1 (en) Riding - type rice transplanter
JP6168012B2 (en) Work vehicle
KR101542440B1 (en) Traveling agricultural machine
KR101391570B1 (en) Control apparatus of folklift
JP5087892B2 (en) Seedling transplanter
KR102127624B1 (en) Work vehicle
CN110654233A (en) Working vehicle
JP6548609B2 (en) Work vehicle
JP2019178698A (en) Vehicle with transmission
JP2006125535A (en) Auto-cruise device of moving vehicle
JP2005119466A (en) Running transmission for working vehicle
JP5171319B2 (en) Ride type rice transplanter
JP5567284B2 (en) Rice transplanter
JP4828972B2 (en) Forward / reverse switching control device for work vehicle
JP5356862B2 (en) Work vehicle
JP5830116B2 (en) Ride type rice transplanter
JP2015101163A (en) Work vehicle
JP4456214B2 (en) Crawler type traveling vehicle
JP6710960B2 (en) Work vehicle
JP2022154730A (en) work vehicle
JP5027596B2 (en) Work vehicle
JP4989501B2 (en) Working gear shifting structure
JP2022169120A (en) work vehicle
JP2007225090A (en) Working vehicle
JP2014166192A (en) Rice transplanter

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200980107746.X

Country of ref document: CN

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

Ref document number: 09716216

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20107018255

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 6694/DELNP/2010

Country of ref document: IN

122 Ep: pct application non-entry in european phase

Ref document number: 09716216

Country of ref document: EP

Kind code of ref document: A1