JP2009210063A - Traveling operation device for riding type rice transplanter - Google Patents

Traveling operation device for riding type rice transplanter Download PDF

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Publication number
JP2009210063A
JP2009210063A JP2008055169A JP2008055169A JP2009210063A JP 2009210063 A JP2009210063 A JP 2009210063A JP 2008055169 A JP2008055169 A JP 2008055169A JP 2008055169 A JP2008055169 A JP 2008055169A JP 2009210063 A JP2009210063 A JP 2009210063A
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Prior art keywords
traveling
pedal
shift
shift pedal
speed change
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JP2008055169A
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JP5497268B2 (en
Inventor
Makoto Inoue
誠 井上
Takashi Nakajima
崇 中嶌
Keishi Kinuta
圭志 絹田
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Yanmar Co Ltd
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Yanmar Co Ltd
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Priority to JP2008055169A priority Critical patent/JP5497268B2/en
Application filed by Yanmar Co Ltd filed Critical Yanmar Co Ltd
Priority to CN201410258850.1A priority patent/CN104110492A/en
Priority to KR1020107018255A priority patent/KR101590434B1/en
Priority to CN201410850651.XA priority patent/CN104604398A/en
Priority to PCT/JP2009/051982 priority patent/WO2009110280A1/en
Priority to CN200980107746XA priority patent/CN101960182A/en
Priority to KR1020167002185A priority patent/KR101716724B1/en
Publication of JP2009210063A publication Critical patent/JP2009210063A/en
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Publication of JP5497268B2 publication Critical patent/JP5497268B2/en
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C11/00—Transplanting machines
    • A01C11/003—Transplanting machines for aquatic plants; for planting underwater, e.g. rice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/04—Ratio selector apparatus
    • F16H59/06—Ratio selector apparatus the ratio being infinitely variable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control 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
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/437—Pump capacity control by mechanical control means, e.g. by levers or pedals

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  • 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

<P>PROBLEM TO BE SOLVED: To facilitate shift-operation of traveling speed of a riding type rice transplanter comprising a traveling machine body 2 having traveling wheels 5, 6 to be driven by an engine 7, a seeding planting device 3 installed at the rear part, a traveling transmission 8 for the traveling wheels, and a gear shift pedal 12 installed at an operation control part 9 of the traveling machine body. <P>SOLUTION: A traveling operation device 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. The actuator 28 operates the traveling transmission to increase a speed when the detection means detects the depressing operation of the gear shift pedal, and operates the traveling transmission to reduce a speed when the detection means detects the releasing operation of the gear shift pedal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は，走行機体の後部に苗植え装置を装着して成る構成の乗用型田植機において，その走行速度を，足踏み式の変速ペダルにて変速操作するための装置に関するものである。   The present invention relates to an apparatus for shifting a traveling speed of a riding-type rice transplanter configured by mounting a seedling planting device at the rear of a traveling machine body with a foot-operated shift pedal.

先行技術としての特許文献１には，前記した構成の乗用型田植機において，その走行の変速を行う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により，前記変速ペダルの踏み込み操作で，前記変速ミッションが走行速度を増速に作動し，前記変速ペダルの踏み込み操作解除で，前記変速ミッションが走行速度を減速に作動するように構成して，その操作性の向上を図ることが記載されている。
特開２００３−２２０９３３号公報 In Patent Document 1 as a prior art, in the riding-type rice transplanter having the above-described configuration, a gap between a shift lever in a traveling shift transmission that performs shifting of the traveling and a foot-operated shift pedal provided in a driving operation unit is as follows. By mechanically interlocking with a rod or the like, the shifting mission operates to increase the traveling speed by depressing the shift pedal, and the shifting mission increases the traveling speed by releasing the depressing operation of the shifting pedal. It is described that it is configured to operate at a reduced speed to improve its operability.
JP 2003-220933 A

しかし，前記先行技術のように，走行変速ミッションにおける変速レバーと，足踏み式の変速ペダルとを，ロッド等にて機械的に連結するという構成にした場合においては，その構造が簡単であるが，その反面，前記変速ペダルの操作動きが遅れなく直ちに走行変速ミッションに伝達するという構造であるから，走行機体が，前記変速ペダルの踏み込み操作によって急発進又は急加速し，前記変速ペダルの踏み込み解除操作によって急減速又は急停止する。   However, as in the prior art, when the shift lever in the traveling shift transmission and the stepped shift pedal are mechanically connected by a rod or the like, the structure is simple. On the other hand, since the operation of the shift pedal is transmitted immediately to the traveling shift mission without delay, the traveling vehicle suddenly starts or accelerates by the depression of the shift pedal, and the depressing release operation of the shift pedal is performed. Suddenly decelerate or stop.

前記急発進又は急加速した場合には，走行機体の前部が浮き上がり，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るという問題を招来し，また，前記急減速又は急停止した場合には，走行機体が横ずれ蛇行するという問題を招来するのであった。   When the vehicle starts suddenly or accelerates rapidly, the front part of the traveling aircraft floats up and the rear seedling planting device is lowered, causing a problem that the seedling planting depth in the field scene becomes deeper than a predetermined value. Further, when the vehicle suddenly decelerates or stops suddenly, a problem arises that the traveling machine body oscillates laterally.

また，前記先行技術の構成においては，走行変速ミッションにおける変速レバーと変速ペダルとがロッド等による機械的な連結構造であるから，前記変速ペダルにおける踏み込む操作が重くなるばかりか，前記変速レバーを変速作動するときの衝撃又は負荷が，前記変速ペダルに，いわゆるキックバックとして伝わり，これらが変速操作性及び操作フィリングを低下するという問題もあった。   Further, in the configuration of the prior art, since the shift lever and the shift pedal in the traveling shift transmission are mechanically connected by a rod or the like, not only the operation of depressing the shift pedal becomes heavy, but also the shift lever is shifted. The impact or load when operating is transmitted to the shift pedal as so-called kickback, which causes a problem that the shift operability and the operation filling are lowered.

本発明は，これらの問題を解消した走行操作装置を提供することを技術的課題とするものである。   An object of the present invention is to provide a traveling operation device that solves these problems.

この技術的課題を達成するため請求項１は，
「エンジンにて駆動の走行車輪を有する走行機体と，後部に装着される苗植え装置と，前記走行車輪に対する走行変速ミッションと，前記走行機体における運転操作部に設けた足踏み式の変速ペダルとから成る乗用型田植機において，
前記走行変速ミッションを変速操作するアクチエータと，前記変速ペダルの踏み込み操作及びこの踏み込んだ状態からの踏み込み解除操作を検出する検出手段とを備え，前記アクチエータは，前記検出手段による前記変速ペダルにおける踏み込み操作の検出にて前記走行変速ミッションを増速に作動し，前記検出手段による前記変速ペダルにおける踏み込み解除操作の検出にて前記走行変速ミッションを減速に作動する構成である。」
ことを特徴としている。 In order to achieve this technical problem, claim 1
“From a traveling vehicle having a traveling wheel driven by an engine, a seedling planting device attached to the rear, a traveling transmission mission for the traveling wheel, and a foot-operated transmission pedal provided in a driving operation unit in the traveling vehicle body In the riding type rice transplanter consisting of
An actuator for shifting the travel transmission mission; and a detecting means for detecting a depressing operation of the shift pedal and a depressing release operation from the depressed state; The travel shift transmission is operated to increase the speed by detecting this, and the travel shift mission is operated to decelerate by detecting the depression release operation on the shift pedal by the detecting means. "
It is characterized by that.

請求項２は，
「前記請求項１の記載において，前記検出手段による検出を入力として前記アクチエータを作動制御するコントローラを備え，前記変速ペダルにおける単位操作量に対する走行速度の単位変速量が，前記コントローラにて変更可能に構成されている。」
ことを特徴としている。 Claim 2
“In the first aspect of the present invention, a controller for controlling the operation of the actuator with the detection by the detection means as an input is provided, and the unit shift amount of the traveling speed with respect to the unit operation amount in the shift pedal can be changed by the controller. It is configured."
It is characterized by that.

請求項３は，
「前記請求項１又は２の記載において，前記走行車輪に対するブレーキ機構及びクラッチ機構を備え，更に，一つの作動部材にて，前記ブレーキ機構をＯＮにして前記クラッチ機構をＯＦＦにする停止状態と，前記ブレーキ機構をＯＦＦにして前記クラッチ機構をＯＮにする走行状態とに切り換え作動するように構成されており，この作動部材は，前記変速ペダルを踏み込まない状態のとき前記停止状態になり，当該変速ペダルを踏み込んだ状態のとき前記走行状態になる構成である。」
ことを特徴としている。 Claim 3
“In the description of claim 1 or 2, the brake mechanism and the clutch mechanism for the traveling wheel are provided, and further, with one actuating member, the brake mechanism is turned on and the clutch mechanism is turned off. The brake mechanism is turned off and the clutch mechanism is turned on. The operating member is in the stop state when the shift pedal is not depressed, and the speed change operation is performed. When the pedal is depressed, the vehicle is in the running state. "
It is characterized by that.

請求項４は，
「前記請求項３の記載において，前記作動部材は，前記走行機体における運転操作部に設けられている足踏み式のブレーキペダルに，当該ブレーキペダルの踏み込み操作により，前記変速ペダルに優先して，前記停止状態になるように関連している。」
ことを特徴としている。 Claim 4
“In the third aspect of the present invention, the actuating member has priority over the shift pedal by depressing the brake pedal to a foot-operated brake pedal provided in a driving operation portion of the traveling machine body. It ’s related to being stopped. ”
It is characterized by that.

前記請求項１の記載によると，前記変速ペダルを踏み込み操作すると，この踏み込み操作が検出手段にて検出され，この検出に応じてアクチエータが作動し，このアクチエータの作動により走行変速ミッションが増速作動する一方，前記変速ペダルを踏み込みを戻すように踏み込み解除操作すると，この踏み込み解除操作が検出手段にて検出され，この検出に応じてアクチエータが作動し，このアクチエータの作動により走行変速ミッションが減速作動する。   According to the first aspect of the present invention, when the shift pedal is depressed, the depressing operation is detected by the detecting means, and the actuator is activated in response to the detection, and the travel shift transmission is accelerated by the activation of the actuator. On the other hand, when the depressing operation is performed so that the shift pedal is depressed, the depressing operation is detected by the detecting means, and the actuator is activated in response to the detection, and the travel shift transmission is decelerated by the activation of the actuator. To do.

つまり，前記変速ペダルと，これによって作動する走行変速ミッションとの間には，前記検出手段による検出と，この検出に基づく前記アクチエータの作動との両方が存在し，これにより，前記変速ペダルの踏み込み操作に際しての急加速又は急発進，及び，前記変速ペダルの踏み込み解除操作に際しての急減速又は急停止を回避することができるから，発進又は加速の際に，圃場面に対する苗植え付けが深植えになることを低減できることに加えて，減速又は停止の際に，走行機体が横ずれ蛇行することを低減できる。   In other words, both the detection by the detecting means and the operation of the actuator based on the detection exist between the shift pedal and the traveling shift mission operated by the shift pedal. Since sudden acceleration or sudden start during operation and sudden deceleration or sudden stop during release operation of the shift pedal can be avoided, seedling planting on the field scene is deeply planted when starting or accelerating In addition to being able to reduce this, it is possible to reduce the meandering of the traveling aircraft when the vehicle decelerates or stops.

しかも，前記変速ペダルにおける踏み込み操作は，前記走行変速ミッションをアクチエータにて変速作動する分だけ軽減されることに加えて，前記変速ペダルには前記走行変速ミッションの変速レバーを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伝わることがないから，変速操作性及び操作フィリングを大幅に向上できる。   In addition, the stepping operation on the shift pedal is reduced by the shift operation of the travel shift mission by the actuator, and the load on the shift pedal when the shift lever of the travel shift mission is shifted is applied to the shift pedal. Further, since the shock is not transmitted as a so-called kickback, the shift operability and the operation filling can be greatly improved.

次に，請求項２の記載によると，前記変速ペダルにおける単位操作量に対する走行速度の単位変速量を，前記コントローラにて変更可能であることにより，例えば，前記変速ペダルの踏み込み操作の初期（発進に際して）において，走行速度の増速度を緩やかにしたり，前記変速ペダルの踏み込み解除操作の終期（停止に際して）において，走行速度の減速度を緩やかにすることが任意に設定できるから，発進に際しての深植え防止，及び，停止に際しての横ずれ蛇行防止の効果を一層に助長できる利点がある。   Next, according to a second aspect of the present invention, the unit shift amount of the traveling speed with respect to the unit operation amount of the shift pedal can be changed by the controller, for example, at the initial stage of the depressing operation of the shift pedal (start In this case, it is possible to arbitrarily set the speed increase of the traveling speed, or to moderate the deceleration of the traveling speed at the end of the depressing operation of the shift pedal (when stopping). There is an advantage that it is possible to further promote the effects of preventing planting and meandering when stopping.

また，請求項３の記載によると，前記変速ペダルから足を離して，前記変速ペダルを踏み込まない状態にすると，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になって走行車輪が停止するから，走行機体の確実な走行停止が行われ，操作性の向上に寄与できる。   According to a third aspect of the present invention, when the foot is released from the shift pedal and the shift pedal is not depressed, the clutch mechanism is turned off and the power transmission to the traveling wheels is cut off and the brake mechanism is turned on at the same time. As a result, the traveling wheels stop, so that the traveling body is reliably stopped and can contribute to the improvement of operability.

更にまた，請求項４の記載によると，前記走行機体の走行停止が，前記変速ペダルによる操作にかかわらず，換言すると，前記変速ペダルによる操作とは関係なく，ブレーキペダルによって任意に行うことができるから，操作性をより向上できる。   Furthermore, according to the fourth aspect of the present invention, the traveling stop of the traveling machine body can be arbitrarily performed by the brake pedal regardless of the operation by the shift pedal, in other words, regardless of the operation by the shift pedal. Therefore, the operability can be further improved.

以下，本発明の実施の形態を，図１〜図７の図面について説明する。   Hereinafter, embodiments of the present invention will be described with reference to FIGS.

図１及び図２において，符号１は，乗用型の田植機を示し，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，車体フレーム４を左右一対の前車輪５と同じく左右一対の後車輪６とで支持するという構成である。   1 and 2, reference numeral 1 denotes a riding type rice transplanter. This riding type rice transplanter 1 has a traveling machine body 2 and a well-known multi-row planting seedling planting mounted on the rear part thereof so that it can be raised and lowered. The traveling machine body 2 is configured such that the vehicle body frame 4 is supported by a pair of left and right rear wheels 6 as well as a pair of left and right front wheels 5.

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記各車輪５，６に伝達するようにようにした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。   An engine 7 is mounted on the vehicle body frame 4 of the traveling machine body 2, and a traveling transmission mission 8 is configured to transmit power to the wheels 5 and 6 by appropriately shifting power from the engine 7. Thus, 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，これらペダル１２，１３は，前記車体フレーム４に枢着されている。   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 is on the floor surface of the driving operation unit 9. The part is provided with a forward stepping type shift pedal 12 and a forward stepping type brake pedal 13 arranged side by side, and these pedals 12, 13 are pivotally attached to the vehicle body frame 4. ing.

前記走行変速ミッション８には，図３に示すように，前記エンジン７からの動力を入力とす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とから成るＨＳＴ式の無段変速機構１４を備え，この無段変速機構１４は，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ように構成して成るものであり，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設けられている。   As shown in FIG. 3, the traveling speed change mission 8 includes a variable hydraulic pump 15 that receives power from the engine 7 and a hydraulic motor 16 driven by the hydraulic pressure from the hydraulic pump 15. The continuously variable transmission mechanism 14 includes an HST type continuously variable transmission mechanism 14, which changes the inclination angle of the swash plate 15 a in the hydraulic pump 15 with the transmission lever 17, thereby increasing the traveling speed of the traveling machine body 2. Although not shown, the speed change lever 17 is provided with spring means for urging the speed change lever 17 in the deceleration direction.

また，前記走行変速ミッション８には，図３に示すように，前記各車輪５，６への動力伝達をＯＮ・ＯＦＦ（断続）するためのクラッチ機構１８を備えているとともに，前記各車輪５，６に対するブレーキ機構１９とを備えている。   Further, as shown in FIG. 3, the traveling speed change mission 8 is provided with a clutch mechanism 18 for turning on / off (interrupting) power transmission to the wheels 5, 6. , 6 is provided with a brake mechanism 19.

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をワイヤー等を介して連結することにより，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において，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おり，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 via a wire or the like. By connecting, 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 brake mechanism 19 is turned off and the clutch mechanism 18 is turned on when the vehicle is rotated backward in the direction indicated by the arrow B in FIG. Each of the operating members 21 or the operation shaft 20 is provided with spring means (not shown) that urges the operating members 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 laterally extending speed change operation shaft 22 is rotatably supported by a bearing 23 at a front portion of the vehicle body frame 4, and the right end of the speed change operation shaft 22 is connected to the speed change pedal 12. A detecting means 24 for detecting a stepping operation and a stepping release operation (described in detail later) is provided, while a sector gear 25 is fixed to the left end of the speed change operation shaft 22.

また，前記変速操作軸２２にはアーム２６が固着され，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，この変速ロッド杆２７の後端に設けた適宜長さＬの長溝孔２７ａには，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おり，これにより，前記無段変速機構１４は，前記変速操作軸２２が回転することなく，ひいては前記変速ロッド杆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における図５及び図６に矢印Ｃで示す反時計方向への回転に伴う前記変速ロッド杆２７の後方への移動が前記長溝孔２７ａの長さＬを越えた時点から前記変速ロッド杆２７の後方への移動に比例して，走行速度を無段に増速する一方，前記変速操作軸２２における図５及び図６に矢印Ｄで示す時計方向への回転に伴う前記変速ロッド杆２７の前方への移動に比例して，走行速度を無段に減速するように構成されている。   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, and an appropriate length provided at the rear end of the speed change rod rod 27. A pin 17a provided at the tip of the speed change lever 17 in the continuously variable transmission mechanism 14 of the traveling speed change transmission 8 is slidably fitted into and engaged with the long groove hole 27a of the traveling speed change transmission 8. The speed change mechanism 14 is in a state in which almost no power is transmitted when the speed change operation shaft 22 does not rotate and, as a result, the speed change rod rod 27 does not move rearward. The movement of the speed change rod rod 27 in the counterclockwise direction indicated by the arrow C in proportion to the rearward movement of the speed change rod rod 27 from the time when the length L of the long groove hole 27a is exceeded. And While the running speed is increased continuously, the speed change rod shaft 27 travels in proportion to the forward movement of the speed change rod rod 27 accompanying the clockwise rotation indicated by the arrow D in FIGS. The speed is continuously reduced.

前記扇形歯車２５には，電動式アクチェータ２８にて回転駆動されるピニオン２９が噛合しており，前記電動式アクチェータ２８にて，前記扇形歯車２５を介して前記変速操作軸２２を，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回転するように構成している。   A pinion 29 that is rotationally driven by an electric actuator 28 is engaged with the sector gear 25, and the speed change operation shaft 22 is connected to the arrow C by way of the sector gear 25. And a counterclockwise direction indicated by the arrow D and a clockwise direction indicated by the arrow D.

前記変速操作軸２２の右端の部分には，これに平行する変速用ペダル軸３０が回転自在に軸支され，この変速用ペダル軸３０は，前記変速ペダル１２に連動機構３１を介して連動されていることにより，前記変速ペダル１２を図示しないばね手段に抗して起立した状態から倒すように踏み込むという踏み込み操作にて矢印Ｅで示す時計方向に回転し，前記変速ペダル１２をその踏み込みの解除にて前記踏み込んだ位置からそのばね手段にて元の起立姿勢の方向に戻すという踏み込み解除操作にて矢印Ｆで示す反時計方向に回転するように構成されている。   A shift pedal shaft 30 parallel to the shift operation shaft 22 is rotatably supported on the right end portion of the shift operation shaft 22, and the shift pedal shaft 30 is linked to the shift pedal 12 via an interlock mechanism 31. Accordingly, the shift pedal 12 is rotated clockwise as indicated by an arrow E by a stepping operation of depressing the shift pedal 12 from a standing state against a spring means (not shown), and the shift pedal 12 is released. In the step release operation of returning to the original standing posture direction by the spring means from the stepped-on position, the rotation is made in the counterclockwise direction indicated by the arrow F.

そして，前記変速操作軸２２の右端における前記検出手段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とから成り，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の先端が係合していることにより，この二股状アーム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′で示すように反時計方向に回動して，一方のスイッチ２４ｄがＯＦＦからＯＮに切り換わり，前記変速ペダル１２における前記踏み込んだ状態からの踏み込み解除操作にて矢印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に切り換わるように構成されている。   The detecting means 24 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 direction from the rotor 24b. The bifurcated arm 24c protrudes and a pair of switches 24d and 24e provided on both sides of the bifurcated arm 24c in the box 24a. The bifurcated arm 24c is connected to the shift pedal shaft 30. When the tip of the projecting arm 32 is engaged, the bifurcated arm 24c and the rotor 24b are rotated counterclockwise as indicated by an arrow E 'by the depressing operation of the speed change pedal 12. One switch 24d is switched from OFF to ON, and the shift pedal 12 is depressed from the depressed state. Rotates in a clockwise direction as indicated by an arrow F 'in releasing operation, the other switch 24e is configured to switch ON from OFF.

図４に符号３３で示すコントローラは，前記検出手段２４の両スイッチ２４ｄ，２４ｅにおける信号を入力として，この入力を適宜変更して前記電動式アクチェータ２８に出力するものであり，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が前記変速操作軸２２を扇形歯車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，後方に移動し，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，前記変速ロッド杆２７が，図４，図６及び図７に点線矢印Ｈで示すように，前方に移動するように構成している。   The controller denoted by reference numeral 33 in FIG. 4 receives signals from both switches 24d and 24e of the detecting means 24 as input, changes the inputs as appropriate, and outputs them to the electric actuator 28. The switches 24d, When one switch 24d of 24e is turned from OFF to ON, the electric actuator 28 rotates the speed change operation shaft 22 in the direction of arrow C via the sector gear 25, so that the speed change rod rod 27 is 4, as shown by a solid arrow G in FIGS. 6 and 7, when the other switch 24e of both the switches 24d and 24e is turned from OFF to ON, the speed change rod rod 27 is moved to FIG. As shown by a dotted arrow H in FIGS. 6 and 7, it is configured to move forward.

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，図８に示すように，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おり，この変速ロッド杆２７の後端部には，前記受け片２１ａに接当するストッパー片２７ｂを設けて，前記変速操作軸２２が回転することなくひいては前記変速ロッド杆２７が後方に移動しない状態，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，前記ストッパー片２７ｂにて，前記一つの作動部材２１を，前記ブレーキ機構１９がＯＮで前記クラッチ機構１８がＯＦＦの停止状態に保持し，前記変速ロッド杆２７の後方への移動により，前記一つの作動部材２１が，その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。   As shown in FIG. 8, one operating member 21 for both the clutch mechanism 18 and the brake mechanism 19 is integrally provided with a receiving piece 21a, and the speed change rod rod 27 is slid on the receiving piece 21a. A stopper piece 27b that comes into contact with the receiving piece 21a is provided at the rear end of the speed change rod rod 27 so that the speed change operation shaft 22 does not rotate and the speed change rod rod 27 Is not moved backward, that is, when the shift pedal 12 is not depressed, the stopper piece 27b causes the one actuating member 21 to be turned on while the brake mechanism 19 is ON and the clutch mechanism 18 is OFF. The one actuating member 21 is shown by a two-dot chain line in FIG. 7 against its spring means by holding it in the stopped state and moving the shift rod rod 27 backward. Rotates behind the urchin arrow B, the brake mechanism 19 is configured such that the clutch mechanism 18 is OFF becomes a traveling state is ON.

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，当該ブレーキペダル１３の踏み込み操作にて，このブレーキ軸３４を回転するように連結されており，このブレーキ軸３４に固着したアーム３５の先端に，後方に延びるブレーキロッド杆３６を連結し，このブレーキロッド杆３５における後端の部分を，図７に示すように，前記一つの作動部材２１に設けた係止片２１ｂを摺動自在に貫通させて，その後端にストッパー３６ａを設けることにより，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ことにより，前記一つの作動部材２１を，前記変速ロッド杆２７にかかわらず，換言すると，前記変速ペダル１２における操作に優先して，強制的に前記停止状態にすることができるように構成している。   The brake pedal 13 arranged in parallel with the speed change pedal 12 is adapted to rotate the brake shaft 34 on the brake shaft 34 rotatably supported on the vehicle body frame 4 by depressing the brake pedal 13. A brake rod rod 36 extending rearward is coupled to the tip of an arm 35 fixed to the brake shaft 34, and the rear end portion of the brake rod rod 35 is connected to the one end as shown in FIG. In a state where the brake pedal 13 is not depressed, the stop state of the one actuating member 21 is achieved by slidably penetrating the locking piece 21b provided on one actuating member 21 and providing a stopper 36a at the rear end thereof. Free operation from the running state (the position indicated by the two-dot chain line in FIG. 7) from the position indicated by the solid line in FIG. 7 is permitted. When the moving member 21 is in the running state, the brake pedal 13 is depressed against its spring, so that the one actuating member 21 can be operated regardless of the speed change rod rod 27, in other words, the speed change gear 21 Prior to the operation of the pedal 12, the stop state can be forcibly set.

この構成において，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は回動されない。   In this configuration, when the speed change pedal 12 is not depressed, the speed change operating shaft 22 does not rotate and the speed change rod rod 27 does not move rearward, so that the HST type continuously variable speed change mechanism 14 of the traveling speed change transmission 8 is provided. The shift lever 17 is not rotated.

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，各図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の動力伝達遮断になっているから，走行機体２は，走行しない。   In addition, when the shift pedal 12 is not depressed, the one actuating member 21 is in a stopped state indicated by a solid line in each figure, and the power transmission is cut off when 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Ｃの方向に回転するから，前記変速ロッド杆２７は，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, and based on this rotation, the bifurcated arm 24c and the rotor 24b in the detecting means 24 move in the direction of arrow E '. By rotating in the direction, one of the switches 24d and 24e in the detection means 24 is switched from OFF to ON, so that the electric actuator 28 is instructed by the controller 33, Since the speed change operation shaft 22 rotates in the direction of arrow C, the speed change rod rod 27 starts to move backward as indicated by a solid line arrow G.

前記変速ロッド杆２７における後方への初期の移動が，その後端における長溝孔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，二点鎖線で走行状態に回動するから，ブレーキ機構１９がＯＦＦでクラッチ機構１８がＯＮの動力伝達になる。   When the initial rearward movement of the speed change rod rod 27 reaches the length L of the long slot 27a at the rear end, the stopper 27b is moved rearward from the receiving piece 21a of the one actuating member 21, thereby Since one actuating member 21 rotates in a traveling state along a two-dot chain line, power transmission is performed when the brake mechanism 19 is OFF and the clutch mechanism 18 is ON.

前記変速ロッド杆２７の後方への移動は，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，その後方への移動が前記長溝孔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が動力伝達に作動するから，走行機体２は走行を始める。   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 is moved. Since the HST type continuously variable transmission mechanism 14 is actuated for power transmission, the traveling machine body 2 starts traveling.

この走行に際しての走行速度は，前記変速ロッド杆２７の更なる後方への移動，ひいては，前記変速ペダル１２の踏み込み操作に比例して行われる。   The travel speed during this travel is proportional to the further rearward movement of the speed change rod rod 27 and, consequently, the operation of depressing 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，ひいては，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から，前記変速ペダル１２の踏み込み位置に対応した走行速度に維持することができる。   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 shift rod rod 27 is moved rearward. Since the vehicle stops at the position, the traveling speed corresponding to the depressed position of the shift pedal 12 can be maintained.

次に，前記変速ペダル１２から足を外すことによって，当該変速ペダル１２を，前記変速位置に踏み込んだ状態からそのばね手段にて元の起立位置まで戻すという踏み込み解除操作を行うと，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における二股状アーム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の方向に回転するから，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。   Next, when a depressing release operation is performed by removing the foot from the speed change pedal 12 to return the speed change pedal 12 to the original standing position by the spring means from the position where the speed change pedal 12 is stepped on to the speed change position. The pedal shaft 30 rotates in the direction of the arrow F, and based on this rotation, the bifurcated arm 24c and the rotor 24b in the detection means 24 rotate in the direction of the arrow F ', whereby both switches 24d, When the other switch 24e of 24e is switched from OFF to ON, the electric actuator 28 rotates the shift operation shaft 22 in the direction of arrow D in response to an instruction from the controller 33. The rod rod 27 moves forward as indicated by the dotted arrow H.

この変速ロッド杆２７の点線矢印Ｈで示す前方への移動により，前記変速レバー１７が後方に回動し，前記ＨＳＴ式無段変速機構１４が減速に作動するから，走行機体２の走行速度は減速される。   As the speed change rod rod 27 moves forward as indicated by the dotted arrow H, the speed change lever 17 rotates rearward and the HST continuously variable speed change mechanism 14 operates to decelerate. Decelerated.

前記した踏み込み解除操作を途中で止める状態に前記変速ペダル１２を保持することで，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Ｄへの方向に回転が継続されることで，前記検出手段２４における他方のスイッチ２４ｅ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Ｄへの方向に回転が停止し，ひいては，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するから，走行速度を，前記した減速した状態に維持することができる。   By holding the shift pedal 12 in a state in which the depression operation described above is stopped halfway, the controller 33 continues to rotate the shift operation shaft 22 in the direction of the arrow D by the electric actuator 28. The other switch 24e in the detecting means 24 is turned from ON to OFF, and in response to an instruction from the controller 33, the rotation of the speed change operation shaft 22 in the direction of the arrow D by the electric actuator 28 is stopped. Since the forward movement of the rod rod 27 stops at that position, the traveling speed can be maintained in the decelerated state described above.

前記変速ペダル１２が，元の起立位置にまで戻った時点で，前記変速レバー１７が元に戻って，前記ＨＳＴ式無段変速機構１４が殆ど動力伝達しない状態になることに加えて，前記一つの作動部材２１が，前記ブレーキ機構１９がＯＮで前記クラッチ機構１８がＯＦＦの停止状態になるから，前記走行機体２の走行は停止する。   When the shift pedal 12 returns to the original standing position, the shift lever 17 returns to the original position so that the HST continuously variable transmission mechanism 14 hardly transmits power. Since the two actuating members 21 are in a stopped state in which the brake mechanism 19 is ON and the clutch mechanism 18 is OFF, 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に際しては，前記変速ペダル１２の踏み込みを検出手段２４で検出し，この検出に基づいてコントローラ３３を介してアクチェータ２８が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う一方，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に際しても，この踏み込み解除操作を検出手段２４で検出し，この検出に応じてアクチエータ２８が走行変速ミッション８を減速に作動することによって行うもので，前記変速ペダル１２と，これによって作動する走行変速ミッション８との間には，前記検出手段２４による検出と，この検出に基づく前記アクチエータ２８の作動との両方が存在し，これにより，前記変速ペダル１２の踏み込み操作に際しての急加速又は急発進，及び，前記変速ペダルの踏み込み解除操作に際しての急減速又は急停止を回避することができる。   Thus, when starting and accelerating by depressing the shift pedal 12, the depressing of the shift pedal 12 is detected by the detecting means 24. Based on this detection, the actuator 28 is operated by the controller 33 via the controller 33. 8 is operated by increasing the speed, while decelerating and stopping by depressing the shift pedal 12 is detected by the detecting means 24, and the actuator 28 travels in response to this detection. The transmission mission 8 is operated by decelerating. Between the shift pedal 12 and the traveling transmission mission 8 operated thereby, the detection by the detecting means 24 and the actuator 28 based on this detection are detected. Both of the operation and the operation of the depressing operation of the shift pedal 12. Acceleration or sudden start, and you can avoid abrupt deceleration or sudden stop of the time depressing the releasing operation of the shift pedal.

これに加えて，前記変速ペダル１２における踏み込み操作力を，前記走行変速ミッション８をアクチエータ２８にて変速作動する分だけ軽減できるほか，前記変速ペダル１２に，前記走行変速ミッション８の変速レバー１７を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伝わることを回避できる。   In addition to this, the depressing operation force on the shift pedal 12 can be reduced by the shift operation of the travel shift mission 8 by the actuator 28, and the shift lever 17 of the travel shift mission 8 can be connected to the shift pedal 12. It can be avoided that the load and impact during the shifting operation are transmitted as so-called kickback.

ところで，前記コントローラ３３には，前記変速ペダル１２における単位操作量に対する走行速度における単位変速量を変更できるようにした機能を備えている。   By the way, the controller 33 has a function that can change the unit shift amount at the traveling speed with respect to the unit operation amount at the shift pedal 12.

すなわち，図８は，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との関係を示す図であり，その関係を，実線で示す一次直線Ｘとすることにより，前記変速ペダル１２における単位操作量ΔＳに対する走行速度における単位変速量ΔＷを，全領域にわたって直線的に比例するように設定したり，或いは，二点鎖線で示す下向き凸の二次曲線Ｙとすることにより，前記変速ペダル１２における単位操作量ΔＳに対する走行速度における単位変速量を，前記変速ペダル１２の踏み込み操作の初期の領域において，前記直線比例のときのΔＷからΔＷ′に小さくし，以後変速ペダル１２の踏み込み操作量に比例して大きくするように設定したりすることができる。   That is, FIG. 8 is a diagram showing 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 primary straight line X indicated by a solid line, whereby the shift pedal 12 The unit shift amount ΔW at the running speed with respect to the unit operation amount ΔS at is set so as to be linearly proportional over the entire region, or is set as a downwardly convex quadratic curve Y indicated by a two-dot chain line, thereby The unit shift amount at the traveling speed with respect to the unit operation amount ΔS in the pedal 12 is decreased from ΔW when the linear proportional operation is performed to ΔW ′ in the initial region of the depression operation of the shift pedal 12, and then the depression operation of the shift pedal 12 is performed. It can be set to increase in proportion to the amount.

後者のよう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，走行速度の増速度を緩やかにし，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）において，走行速度の減速度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，及び，停止に際しての横ずれ蛇行防止の効果を一層に助長できる。   By setting the latter, the speed increase of the traveling speed is moderated at the initial stage of the depression operation of the shift pedal 12 (when starting), and the traveling is performed at the final stage (when the shift pedal 12 is released) (when stopping). Since the deceleration of the speed can be made gentle, it is possible to further promote the effects of preventing deep planting at the start and preventing lateral slippage at the time of stopping.

また，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の傾きを代えたり，前記下向き凸の二次曲線Ｙの形状を代えたり，上向き凸の二次曲線にしたりすることができるほか，一次直線又は二次曲線を，前記変速ペダル１２における踏み込み操作のときと，踏み込み解除操作のときとで代えるように設定することができる。   When the controller 33 sets the relationship between the operation amount S of the shift pedal 12 and the shift amount W of the traveling speed, the primary straight line X can be used in addition 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 an upward convex quadratic curve, or a linear or quadratic curve can be used for the depression operation of the shift pedal 12. It is possible to set so that the time is different from that at the time of the depression release operation.

前記した実施の形態においては，前記エンジン７の駆動回転数を，前記走行変速ミッション８における変速作動に応じて自動的に変更するように構成している。   In the above-described embodiment, the drive rotational speed of the engine 7 is automatically changed according to the shift operation in the traveling shift transmission 8.

すなわち，図６に示すように，前記扇形歯車２５に，円周方向に延びるカム溝３７を設けるに際し，このカム溝３７を，その始端３７ａが前記扇形歯車２５の中心である前記変速操作軸２２から大きい半径Ｒ１の部位に位置する一方，終端３７ｂが前記変速操作軸２２から小さい半径Ｒ２の部位に位置するというように，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つれて次第に回転中心に近づくように傾斜するという構成にする。   That is, as shown in FIG. 6, when the cam gear 37 is provided with a cam groove 37 extending in the circumferential direction, the cam gear 37 is provided with the speed change operation shaft 22 whose start end 37a is the center of the fan gear 25. The rotational direction of the sector gear 25 in the direction of the arrow C, that is, the traveling speed is increased so that the end 37b is located at a portion of a small radius R2 from the speed change operation shaft 22 while being located at a portion of a large radius R1. It is configured to incline so as to gradually approach the center of rotation as the rotational direction increases.

このカム溝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の先端を摺動自在に係合する一方，前記横軸３８に固着した第２アーム４０と，前記エンジン７におけるアクセルレバー７ａとの間を，ワイヤー４１等にて連結するという構成である。   The cam groove 37 is slidably engaged with a tip of a first arm 39 protruding from a horizontal shaft 38 rotatably supported on the vehicle body frame 4, and a second arm 40 fixed to the horizontal shaft 38. And the accelerator lever 7a in 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の矢印Ｃへの回転方向，つまり，走行速度の増速に応じて，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に抗しして矢印Ｊで示す方向に回転するから，前記エンジン７における回転数は，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, the accelerator lever 7a is opposed to its return spring means 7b in the cam groove 37 in accordance with the direction of rotation of the sector gear 25 in the direction of arrow C, that is, the increase in travel speed. Since the engine 7 rotates in the direction indicated by J, 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の矢印Ｄへの回転方向，つまり，走行速度の減速に応じて，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にて前記とは逆の矢印Ｋで示す方向に戻り回転するから，前記エンジン７における回転数は，走行速度の減速に比例して自動的に減速され，走行が停止したときにアイドル回転になる。   On the other hand, according to the rotation direction of the sector gear 25 in the direction of the arrow D, that is, in accordance with the reduction of the traveling speed, the accelerator lever 7a is returned by the return spring means 7b in the cam groove 37. Therefore, the rotational speed of the engine 7 is automatically decelerated in proportion to the reduction in travel speed, and becomes idle when travel stops.

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 operating the accelerator lever 7a.

乗用型田植機の側面図である。It is a side view of a riding type rice transplanter. 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を示す概略図である。It is the schematic which shows a traveling 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−VII 視拡大断面図である。FIG. 7 is an enlarged sectional view taken along line VI-VII in FIG. 4. 図４の要部拡大図である。It is a principal part enlarged view of FIG. 変速ペダルの操作量と走行速度の変速量との関係を示す図である。It is a figure which shows the relationship between the amount of operation of a speed-change pedal, and the amount of shifting of traveling speed.

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 前輪
６ 後輪
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 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
２５ 変速用扇形歯車
２７ 変速ロッド杆
２８ アクチェータ
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 6 Rear wheel 7 Engine 8 Traveling transmission mission 9 Driving operation part 12 Shift pedal 13 Brake pedal 14 HST type continuously variable transmission mechanism 17 Shift lever 18 Crack mechanism 19 Brake mechanism 21 Actuating member 22 Shifting operation shaft 24 Detecting means 25 Shifting sector gear 27 Shifting rod rod 28 Actuator 33 Controller

Claims (4)

エンジンにて駆動の走行車輪を有する走行機体と，後部に装着される苗植え装置と，前記走行車輪に対する走行変速ミッションと，前記走行機体における運転操作部に設けた足踏み式の変速ペダルとから成る乗用型田植機において，
前記走行変速ミッションを変速操作するアクチエータと，前記変速ペダルの踏み込み操作及びこの踏み込んだ状態からの踏み込み解除操作とを検出する検出手段とを備え，前記アクチエータは，前記検出手段による前記変速ペダルにおける踏み込み操作の検出にて前記走行変速ミッションを増速に作動し，前記検出手段による前記変速ペダルにおける踏み込み解除操作の検出にて前記走行変速ミッションを減速に作動する構成であることを特徴とする乗用型田植機における走行操作装置。 A traveling body having traveling wheels driven by an engine, a seedling planting device mounted on the rear, a traveling speed change mission for the traveling wheels, and a stepped shift pedal provided in a driving operation section of the traveling body. In riding type rice transplanter,
An actuator for shifting the travel transmission mission; and a detecting means for detecting a depressing operation of the shifting pedal and a depressing release operation from the depressed state, wherein the actuator depresses the shifting pedal by the detecting means. The riding type characterized in that the traveling gearshift mission is actuated to increase speed by detecting an operation, and the traveling gearshift mission is actuated to decelerate by detecting the depression release operation on the shift pedal by the detecting means. Traveling operation device in rice transplanter. 前記請求項１の記載において，前記検出手段による検出を入力として前記アクチエータを作動制御するコントローラを備え，前記変速ペダルにおける単位操作量に対する走行速度の単位変速量が，前記コントローラにて変更可能に構成されていることを特徴とする乗用型田植機における走行操作装置。   2. The controller according to claim 1, further comprising a controller that controls operation of the actuator based on detection by the detection means, and a unit shift amount of a traveling speed with respect to a unit operation amount of the shift pedal can be changed by the controller. A traveling operation device for a riding type rice transplanter, characterized in that: 前記請求項１又は２の記載において，前記走行車輪に対するブレーキ機構及びクラッチ機構を備え，更に，一つの作動部材にて，前記ブレーキ機構をＯＮにして前記クラッチ機構をＯＦＦにする停止状態と，前記ブレーキ機構をＯＦＦにして前記クラッチ機構をＯＮにする走行状態とに切り換え作動するように構成されており，この作動部材は，前記変速ペダルを踏み込まない状態のとき前記停止状態になり，当該変速ペダルを踏み込んだ状態のとき前記走行状態になる構成であることを特徴とする乗用型田植機における走行操作装置。   In the claim 1 or 2, the brake mechanism and the clutch mechanism for the traveling wheel are provided, and further, with one operating member, the stop state in which the brake mechanism is turned on and the clutch mechanism is turned off; The operation mechanism is configured to switch to a running state in which the brake mechanism is turned off and the clutch mechanism is turned on, and the operating member is in the stopped state when the shift pedal is not depressed, and the shift pedal A traveling operation device in a riding type rice transplanter, wherein the traveling state is in the traveling state when the pedal is depressed. 前記請求項３の記載において，前記作動部材は，前記走行機体における運転操作部に設けられている足踏み式のブレーキペダルに，当該ブレーキペダルの踏み込み操作により，前記変速ペダルに優先して，前記停止状態になるように関連していることを特徴とする乗用型田植機における走行操作装置。
4. The operation member according to claim 3, wherein the actuating member is given priority to a stepping brake pedal provided in a driving operation portion of the traveling machine body, and the stop pedal is prioritized by the depression operation of the brake pedal. A traveling operation device in a riding type rice transplanter characterized by being related to a state.
JP2008055169A 2008-03-05 2008-03-05 Traveling operation device for riding rice transplanter Active JP5497268B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP2008055169A JP5497268B2 (en) 2008-03-05 2008-03-05 Traveling operation device for riding rice transplanter
KR1020107018255A KR101590434B1 (en) 2008-03-05 2009-02-05 Riding-type rice transplanter
CN201410850651.XA CN104604398A (en) 2008-03-05 2009-02-05 Riding-type rice transplanter
PCT/JP2009/051982 WO2009110280A1 (en) 2008-03-05 2009-02-05 Riding - type rice transplanter
CN201410258850.1A CN104110492A (en) 2008-03-05 2009-02-05 Riding-type rice transplanter
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

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JP2008055169A JP5497268B2 (en) 2008-03-05 2008-03-05 Traveling operation device for riding rice transplanter

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JP2014043526A Division JP5830116B2 (en) 2014-03-06 2014-03-06 Ride type rice transplanter

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JP5497268B2 JP5497268B2 (en) 2014-05-21

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CN104110492A (en) 2014-10-22
CN104604398A (en) 2015-05-13
KR101716724B1 (en) 2017-03-15
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KR101590434B1 (en) 2016-02-18
KR20100124722A (en) 2010-11-29

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