JPS5816845B2 - Lifting device for walking rice transplanter - Google Patents
Lifting device for walking rice transplanterInfo
- Publication number
- JPS5816845B2 JPS5816845B2 JP3910979A JP3910979A JPS5816845B2 JP S5816845 B2 JPS5816845 B2 JP S5816845B2 JP 3910979 A JP3910979 A JP 3910979A JP 3910979 A JP3910979 A JP 3910979A JP S5816845 B2 JPS5816845 B2 JP S5816845B2
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- aircraft
- float
- rice transplanter
- state
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Landscapes
- Transplanting Machines (AREA)
Description
【発明の詳細な説明】
本発明は、機体の下側にフロートを上下動可能に装着し
、かつ機体にスイングアームを介して走行車輪を上下動
可能に取付け、植付状態でフロートに作用する接地圧変
動に応じ油圧装置により走行車輪を上下動して機体を田
面に対し略々一定レベルに下降、上昇するように制御す
る歩行型田植機の機体昇降装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a float is attached to the underside of the machine so that it can move up and down, and a running wheel is attached to the body via a swing arm so that it can move up and down, and the float is operated in a planted state. This invention relates to a device for lifting and lowering the body of a walk-behind rice transplanter, which controls the body of the rice transplanter to be lowered and raised to a substantially constant level relative to the rice field by moving the running wheels up and down using a hydraulic system in response to ground pressure fluctuations.
このような機体昇降装置では、前記油圧装置の油圧ポン
プとスイングアームを作動させる油圧シリンダ機構との
間に設けた切換弁に、下端がフロートに連繋された昇降
検知手段を接続すると共に、さらに手元操作装置を連繋
し、該操作装置の手元操作によって切換弁を切換えるこ
とにより、機体を強制上昇させ、あるいは切換弁を中立
状態にして機体を上昇状態に固定し得るようにしtいる
。In such an aircraft elevating device, an elevating detecting means whose lower end is connected to a float is connected to a switching valve provided between a hydraulic pump of the hydraulic device and a hydraulic cylinder mechanism that operates a swing arm. By linking the operating device and switching the switching valve by hand operation of the operating device, the aircraft can be forcibly raised, or the switching valve can be placed in a neutral state to fix the aircraft in the ascending state.
しかし従来のものは、手元操作装置の操作経路が、切換
弁を植付状態の自動位置から、中立位置(固定位置)を
経て、機体を強制上昇させる上昇位置にもたらすように
なっていたので、枕地における旋回時に車輪の上下動を
一時、固定状態に切換える際、操作装置を一旦、切換弁
の上昇位置にし、機体を浮上させた後に中立位置に戻し
て旋回に移らなければならず、操作がきわめて煩雑で、
また操作が自動位置→中立→上昇→中立の手順を経るこ
とから旋回操作に時間がかかつて作業能率が悪く、操作
を省略化して機体を浮上させずに旋回すると、フロート
の接地圧が大きいことより、フロートによる泥押しが多
くなるという問題があった。However, in the conventional model, the operation path of the hand-operated device was such that the switching valve was brought from the automatic position in the planted state, through the neutral position (fixed position), and then to the raised position where the aircraft was forcibly raised. When turning the wheels on a headland, when temporarily switching the vertical movement of the wheels to a fixed state, the operating device must be placed in the up position of the switching valve, and after the aircraft has surfaced, it must be returned to the neutral position and the turning can be started. is extremely complicated,
In addition, since the operation goes through the steps of automatic position → neutral → rise → neutral, turning operations take time and work efficiency is poor, and if the operations are simplified and the aircraft turns without levitating, the ground pressure of the float will be high. Therefore, there was a problem in that mud was pushed more often by the float.
本発明は、このような問題を解決するためになされたも
ので、前述のような歩行型田植機の機体昇降装置におい
て、手元操作装置の操作経路を、切換弁が植付状態の自
動位置から→機体を強制上昇させる上昇位置を経て→中
立位置に至る、ように構成することにより、田植機の枕
地旋回時に手元操作装置を操作すると上昇位置を通り、
この上昇位置を通過する間に機体の上昇作動が行なわれ
て、機体が少し浮上されるようにし、これによって、フ
ロートによる泥押しを少なくして、機体の走行を停止す
ることなく旋回操作が簡単で、かつ能率的に行われるよ
うにしたものである。The present invention has been made to solve such problems, and in the above-mentioned body lifting device of a walking rice transplanter, the operation path of the hand control device is changed from the automatic position where the switching valve is in the planting state. By configuring the rice transplanter to go through a raised position where the machine is forcibly raised, and then reach the neutral position, when the rice transplanter turns the headland and operates the hand control device, it will pass through the raised position.
While passing through this raised position, the aircraft is raised slightly, allowing the aircraft to rise slightly. This reduces mud pushing by the floats and makes turning operations easier without stopping the aircraft. This is done in an efficient manner.
以下、図面を参照して本発明の一実施例を具体的に説明
する。Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.
第1図において、符号1は歩行型田植機の機体で、機体
1の下方にはフロート2が設置され、該フロート2は、
その後部が機体1側に回動自在に枢着され、前部がリン
ク3を介して昇降自在に機体1に連結されている。In FIG. 1, reference numeral 1 is the body of a walking rice transplanter, a float 2 is installed below the body 1, and the float 2 is
The rear part is rotatably pivoted to the body 1 side, and the front part is connected to the body 1 via a link 3 so as to be movable up and down.
機体1には前後方向の略中央部に左右一対の走行車輪5
を有し、この車輪5は、機体1に基部を枢支させたスイ
ングアーム4の自由端に軸支されていて上下動可能とな
っており、そして前記車輪5は、機体1の後部に設けた
植付体6と共に、機体1の前部に搭載したエンジン7に
よって駆動されるようになっている。The fuselage 1 has a pair of left and right running wheels 5 approximately at the center in the longitudinal direction.
The wheel 5 is pivotally supported by the free end of a swing arm 4 whose base is pivotally supported on the body 1, and is movable up and down. It is designed to be driven together with the planting body 6 by an engine 7 mounted on the front part of the aircraft body 1.
前記機体1には油圧装置8が設けられ、該油圧装置8は
、第1図乃至第3図に示すように、油圧ポンプ9と、油
圧シリンダ機構10と、これらの間に設けた後述するロ
ータリ式の切換弁11と、図示しないタンクとを備えて
いる。The aircraft body 1 is provided with a hydraulic system 8, which, as shown in FIGS. It is equipped with a type switching valve 11 and a tank (not shown).
そして切換弁11には、その弁体13に設けたアーム1
3aに下端が前記フロート2の前部に連繋された昇降検
知手段12の上端が接続されている。The switching valve 11 has an arm 1 provided on the valve body 13.
The upper end of a lift detecting means 12 whose lower end is connected to the front part of the float 2 is connected to 3a.
また機体1の後部には、苗タンク14の背後に斜め後上
方に延びるハンドル15が装備され、このハンドル15
に取付板16が固定されてあり、該取付板16には手元
操作レバー17が枢着されている。Further, at the rear of the machine body 1, a handle 15 is provided behind the seedling tank 14 and extends diagonally rearward and upward.
A mounting plate 16 is fixed to the mounting plate 16, and a hand control lever 17 is pivotally mounted to the mounting plate 16.
該操作レバー17は、後述するガイド手段18および操
作ケーブル19を介して前記切換弁11の弁体13に設
けた別のアーム20に連結されている。The operating lever 17 is connected to another arm 20 provided on the valve body 13 of the switching valve 11 via a guide means 18 and an operating cable 19, which will be described later.
前記ガイド手段18は、操作レバー17に固定されたカ
ム板21と、該カム板21に圧接されるカムレバー22
と、カムレバー22をカム板21に圧接させるはね23
を備え、カムレバー22に前記操作ケーブル19が連結
されている。The guide means 18 includes a cam plate 21 fixed to the operating lever 17 and a cam lever 22 pressed against the cam plate 21.
and a spring 23 that presses the cam lever 22 against the cam plate 21.
The operating cable 19 is connected to the cam lever 22.
前記カム板21のカム面には、切換弁11を切換動作す
る3つのカム面A、B、Cを有し、特に機体1を強制上
昇させる作動状態となる上昇部分Bを中間として、その
一側に切換弁11が植付状態となる自動位置Aと、他側
に切換弁11が中立状態となる中立位置C1とが連続し
た形態に配置形成されている。The cam surface of the cam plate 21 has three cam surfaces A, B, and C that operate to switch the switching valve 11, and one of the cam surfaces has a rising portion B in the middle where the operating state for forcibly lifting the fuselage 1 is in the middle. An automatic position A where the switching valve 11 is in a planted state on one side and a neutral position C1 where the switching valve 11 is in a neutral state on the other side are arranged and formed in a continuous manner.
前記切換弁11は、貫通穴24を有する弁体13が弁筺
25に回動自在に嵌合され、該弁筺25にはポンプ側ポ
ートa、タンク側ポートb、ピストン進出側すなわち機
体上昇側ポートc、およびピストン退入側すなわち機体
下降側ポートd、が90度の角度間階で設けられている
。In the switching valve 11, a valve body 13 having a through hole 24 is rotatably fitted into a valve housing 25, and the valve housing 25 has a pump side port a, a tank side port B, and a piston advancing side, that is, a body rising side. A port c and a port d on the piston retraction side, that is, on the body lowering side, are provided at an angle of 90 degrees.
なお第1図中符号26はピストン、27は連結手段であ
る。In FIG. 1, reference numeral 26 is a piston, and 27 is a connecting means.
以上のように構成された機体昇降装置は、手元操作レバ
ー17のカム板21の自動位置Aにカムレバー22が圧
接している時には植付状態となる。The body elevating device configured as described above is in a planted state when the cam lever 22 is in pressure contact with the automatic position A of the cam plate 21 of the hand control lever 17.
この状態では、操作ケーブル19が緩められているので
切換弁11の弁体13は、フロート2に連繋された検知
手段12により、田面上を滑走するフロート2の接地圧
に応じて切換を制御される。In this state, since the operating cable 19 is loosened, the switching of the valve body 13 of the switching valve 11 is controlled by the detection means 12 connected to the float 2 according to the ground pressure of the float 2 sliding on the rice field. Ru.
そして、油圧シリンダ機構10のシリンダの一端側また
は他端側に油圧ポンプ9からの圧油を供給して油圧シリ
ンダ機構10のピストン26を進出、退入させ、該ピス
トン26に連結手段27を介して連結されたスイングア
ーム4を上下揺動させる。Then, pressure oil from the hydraulic pump 9 is supplied to one end side or the other end side of the cylinder of the hydraulic cylinder mechanism 10 to advance and retract the piston 26 of the hydraulic cylinder mechanism 10, and the piston 26 is connected to the piston 26 via the connecting means 27. The connected swing arm 4 is vertically swung.
これによって耕盤上を走行する走行車輪5が、耕盤の凹
凸等により上下動し、フロート2に作用する接地圧が大
きい時には走行車輪5を下降方向に、接地圧が小さい時
には該車輪5を上昇方向に、それぞれ上下動することに
よって、機体1を円面に対し上昇、下降させて機体1が
一定レベルで田面上を滑走するようにし、植付体6によ
る苗の植付けを所定深さに制御する。As a result, the running wheels 5 running on the tiller move up and down due to the unevenness of the tiller, and when the ground pressure acting on the float 2 is large, the running wheels 5 are moved downward, and when the ground pressure is small, the running wheels 5 are moved downward. By moving up and down in the ascending direction, the machine body 1 is raised and lowered relative to the circular surface, so that the machine body 1 slides on the rice field at a constant level, and the planting body 6 plants the seedlings at a predetermined depth. Control.
田植機を枕地において旋回する時には、植付体6の作動
を停止し、手元操作レバー17により車輪の上下動を一
時、固定状態に切換えるが、この際、手元操作レバー1
7によりてカム板21を回動させて自動位置Aから固定
状態の中立位置Cに移行させると、この過程でカム板2
1の上昇部分Bが一時的にカムレバー22に圧接される
。When turning the rice transplanter on a headland, the operation of the planting body 6 is stopped and the vertical movement of the wheels is temporarily switched to a fixed state using the hand control lever 17.
7, when the cam plate 21 is rotated from the automatic position A to the fixed neutral position C, the cam plate 21 is rotated in this process.
1 is temporarily pressed against the cam lever 22.
これによりカムレバー22が回動して操作ケーブル19
を引張り、切換弁11の弁体13を第3図の鎖線に示す
ように回動させ、その貫通穴24を介してポンプ側ポー
トaと機体上昇側ポートcとが一時的に連通ずる。As a result, the cam lever 22 rotates and the operation cable 19
is pulled, and the valve body 13 of the switching valve 11 is rotated as shown by the chain line in FIG. 3, and the pump side port a and the body lifting side port c are temporarily communicated through the through hole 24.
このため、油圧シリンダ機構10の車輪下降側に圧油が
供給され、フロート2の接地圧と関係なしに強制的に機
体1が少し上昇する。Therefore, pressure oil is supplied to the wheel lowering side of the hydraulic cylinder mechanism 10, and the body 1 is forcibly raised a little regardless of the ground pressure of the float 2.
そして前記操作レバー17の回動操作により、カム板2
1が上昇部分Bを越えて中立位置Cに達すると、カムレ
バー22が若干逆方向に回動することにより、切換弁1
1の弁体13が第3図の実線に示すポンプ側ポートaと
タンク側ポートbとを連通させ、かつ機体上昇側ポート
cと機体下降側ポートdとを連通させる中立状態となる
。Then, by rotating the operating lever 17, the cam plate 2
1 crosses the rising portion B and reaches the neutral position C, the cam lever 22 rotates slightly in the opposite direction, causing the switching valve 1 to
A neutral state is established in which the first valve body 13 communicates the pump side port a and the tank side port b shown by the solid line in FIG. 3, and communicates the body ascending side port c and the machine descending side port d.
このため、油圧シリンダ機構10が固定状態となって、
機体1は少し上昇した状態で維持され、フロート2の接
地圧が小さくなった状態で旋回が行われるから、枕地で
の泥押しを少くして旋回することができる。Therefore, the hydraulic cylinder mechanism 10 is in a fixed state,
Since the aircraft 1 is maintained in a slightly elevated state and turns are performed with the ground pressure of the float 2 being reduced, it is possible to turn with less mud pushing on the headland.
旋回完了後は、操作レバー17を旋回開始時とは逆に回
動してカム板21の自動位置Aにカムレバー22が圧接
する位置に戻すと、前述したように操作ケーブル19が
緩められて、切換弁11の弁体13は、フロート2に連
繋された検知手段12により切換え制御される植付状態
となる。After the rotation is completed, the operation lever 17 is rotated in the opposite direction from when the rotation was started to return the cam lever 22 to the automatic position A of the cam plate 21, and the operation cable 19 is loosened as described above. The valve body 13 of the switching valve 11 is in a planted state, which is switched and controlled by the detection means 12 connected to the float 2.
この復帰過程においても、一時的にカム板12の上昇部
分Bがカムレバー22に圧接されて機体は少し」二昇す
るが、しかし自動位置に移行すると、機体1は自重によ
って瞬時に下降するから、支障なく直ちに正常の植付状
態に戻ることができる。During this return process, the rising portion B of the cam plate 12 is temporarily pressed against the cam lever 22, causing the aircraft to rise slightly, but when it shifts to the automatic position, the aircraft 1 instantly descends due to its own weight. It is possible to immediately return to the normal planting state without any problems.
なお、上記実施例では、切換弁11の切換え操作を操作
レバー17、ガイド手段18などのいわゆる機械的手段
で行なうようにしたが、これを電気的手段によって行な
うようにしてもよいものである。In the above embodiment, the switching operation of the switching valve 11 is performed by so-called mechanical means such as the operating lever 17 and the guide means 18, but this may be performed by electrical means.
以上説明したように、本発明による歩行型田植機の機体
昇降装置によれば、枕地旋回時等において、手元操作装
置により車輪の上下動を一時、固定状態に切換えるべく
操作装置を自動位置から中立位置に移動すると、その移
行過程で上昇部分を通過することから自動的に機体が少
し上昇した状態で、機体が固定状態となるから、フロー
トの接地圧が小さくなって旋回時に、フロートによる泥
押しを少なくすることができる。As explained above, according to the body lifting device for a walking rice transplanter according to the present invention, when turning a headland, etc., the operating device is moved from the automatic position to temporarily switch the vertical movement of the wheels to the fixed state using the hand operating device. When moving to the neutral position, the aircraft automatically rises a little as it passes through a rising section during the transition process and becomes stationary, which reduces the ground pressure of the float and prevents the float from muddying up when turning. The pressure can be reduced.
しかもその操作は、手元操作装置を直線的に一方向へ移
動操作することにより機体の上昇と固定が同時的に行わ
れるので、操作が簡単で、従来のこの種の装置にみられ
るように機体上昇と固定を2段階的に操作していたもの
に比して、操作を大巾に単純化できる上に、加えて機体
上昇は操作装置の上昇部分を通過する間で行われること
から、操作装置のソフト速度をコントロールすることに
より機体の上昇高さを適宜に選定することができ、不必
要に機体を高位置に完全上昇しないから旋回後の、植付
作業への移行が円滑で作業能率の向」−をはかることが
できる等の効果も併せ得られる。Furthermore, the operation is simple, as the aircraft is raised and fixed at the same time by moving the hand control device linearly in one direction. Compared to the two-step operation of raising and fixing, the operation can be greatly simplified, and in addition, since the aircraft is raised while passing the raising part of the control device, the operation is much easier. By controlling the soft speed of the device, the lifting height of the aircraft can be appropriately selected, and the aircraft does not rise completely to a high position unnecessarily, so the transition to planting work after turning is smooth and work efficiency is improved. Other effects such as being able to measure the direction of the object can also be obtained.
第1図は本発明の一実施例による機体昇降装置を備えた
歩行型田植機を示す概略側面図、第2図は油圧装置の一
部を切欠いた側面図、第3図は切換弁部の断面説明図で
ある。
1・・・・・・機体、2・・・・・・フロート、3・・
・・・・リンク、4・・・・・・スイングアーム、5・
・・・・・走行車輪、6・・・・・・植付体、7・・・
・・・エンジン、8・・・・・・油圧装置、9・・・・
・・油圧ポンプ、10・・・・・・油圧シリンダ機構、
11・・・・・切換弁、12・・・・・・検知手段、1
3・・・・・・弁体、14・・・・・・苗タンク、15
・・・・・・バンドル、16・・・・・・取付板、17
・・・・・・手元操作レバー、18・・・・・・ガイド
手段、19・・・・・・操作ケーブル、20・・・・・
・アーム、21・・・・・・カム板、22・・・・・・
カムレバー、23・・・・・・ばね、24・・・・・・
貫通穴、25・・・・・・弁筺、26・・・・・・ピス
トン、27・・・・・・連結手段、A・・・・・・自動
位置、B・・・・・・上昇部分、C・・・・・・中立位
置、a・・・・・・ポンプ側ポート、b・・・・・・タ
ンク側ポート、C・・・・・・機体上昇側ポート、d・
・・・・・機体下降側ポート。Fig. 1 is a schematic side view showing a walking rice transplanter equipped with a body lifting device according to an embodiment of the present invention, Fig. 2 is a side view with a part of the hydraulic system cut away, and Fig. 3 is a diagram of the switching valve section. It is a cross-sectional explanatory view. 1... Aircraft, 2... Float, 3...
...Link, 4...Swing arm, 5.
... Traveling wheels, 6 ... Planting body, 7 ...
...Engine, 8...Hydraulic system, 9...
...Hydraulic pump, 10...Hydraulic cylinder mechanism,
11...Switching valve, 12...Detection means, 1
3... Valve body, 14... Seedling tank, 15
...Bundle, 16...Mounting plate, 17
......Hand control lever, 18...Guide means, 19...Manipulation cable, 20...
・Arm, 21...Cam plate, 22...
Cam lever, 23... Spring, 24...
Through hole, 25...Valve housing, 26...Piston, 27...Connection means, A...Automatic position, B...Rise Part, C: Neutral position, a: Pump side port, b: Tank side port, C: Aircraft ascending side port, d.
...Aircraft lowering side port.
Claims (1)
機体にスイングアームを介して上下動可能に取付けられ
た走行車輪と、該走行車輪を上下動させる油圧シリンダ
機構とその切換弁とを有し、上記切換弁に、下端が前記
フロートに連繋された昇降検知手段を接続すると共に、
さらに手元操作装置を連繋し、この手元操作装置は、操
作経路の中間に切換弁を機体上昇位置にシフトする上昇
部分を配し、その両側に切換弁を植付状態にシフトする
自動位置と、切換弁を中立状態にシフトする中立位置と
を配設してなることを特徴とする歩行型田植機の機体昇
降装置。1. A float supported on the underside of the aircraft so that it can move up and down,
It has a running wheel attached to the aircraft body so as to be movable up and down via a swing arm, a hydraulic cylinder mechanism for moving the running wheel up and down, and a switching valve thereof, and a lower end of the switching valve is connected to the float. In addition to connecting the elevation detection means,
Furthermore, a hand-operated device is connected, and this hand-operated device has a rising part in the middle of the operation path that shifts the switching valve to the aircraft raised position, and an automatic position on both sides of the rising part that shifts the switching valve to the planted state. A body lifting device for a walk-behind rice transplanter, characterized in that it is provided with a neutral position for shifting a switching valve to a neutral state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3910979A JPS5816845B2 (en) | 1979-03-31 | 1979-03-31 | Lifting device for walking rice transplanter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3910979A JPS5816845B2 (en) | 1979-03-31 | 1979-03-31 | Lifting device for walking rice transplanter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55131310A JPS55131310A (en) | 1980-10-13 |
JPS5816845B2 true JPS5816845B2 (en) | 1983-04-02 |
Family
ID=12543901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3910979A Expired JPS5816845B2 (en) | 1979-03-31 | 1979-03-31 | Lifting device for walking rice transplanter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5816845B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60186215A (en) * | 1985-02-15 | 1985-09-21 | ヤンマー農機株式会社 | Machine height control apparatus in rice planter |
-
1979
- 1979-03-31 JP JP3910979A patent/JPS5816845B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS55131310A (en) | 1980-10-13 |
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