JP3285988B2 - Ground work machine - Google Patents
Ground work machineInfo
- Publication number
- JP3285988B2 JP3285988B2 JP02779293A JP2779293A JP3285988B2 JP 3285988 B2 JP3285988 B2 JP 3285988B2 JP 02779293 A JP02779293 A JP 02779293A JP 2779293 A JP2779293 A JP 2779293A JP 3285988 B2 JP3285988 B2 JP 3285988B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- state
- work
- lifting
- lowering
- 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 - Fee Related
Links
Landscapes
- Transplanting Machines (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、走行機体の後部に駆動
機構により駆動昇降自在に対地作業装置を連結するとと
もに、走行機体からの動力を作業クラッチを介して入り
切り操作自在に前記対地作業装置に伝えるよう構成し、
前記対地作業装置を所定位置まで強制上昇させる状態と
接地下降させる状態とに切り換え自在な昇降操作スイッ
チを備えてある対地作業機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground working device which is connected to a rear part of a traveling machine body by a driving mechanism so as to be driven up and down freely, and is capable of operably turning on and off the power from the traveling machine body via a work clutch. To communicate to
The present invention relates to a ground working machine provided with a lifting operation switch capable of switching between a state in which the ground working device is forcibly raised to a predetermined position and a state in which the ground working device is lowered.
【０００２】[0002]
【従来の技術】上記対地作業機において、従来では、例
えば本出願人による特願平４−５０１５７号において示
されるように、圃場での畦際旋回の際に前記昇降操作ス
イッチを操作すると、苗植付装置〔対地作業装置〕が最
大上昇位置まで強制上昇するとともに、再度、スイッチ
操作すると接地下降するよう構成されていた。2. Description of the Related Art In the above-mentioned ground working machine, conventionally, as shown in Japanese Patent Application No. 4-50157 by the present applicant, when the raising / lowering operation switch is operated at the time of turning on a ridge in a field, seedlings are obtained. The planting device (ground work device) is configured to be forcibly raised to the maximum ascending position, and to be lowered when touching the switch again.
【０００３】[0003]
【発明が解決しようとする課題】上記したような昇降操
作構造は、従来より行われていた昇降レバーの揺動操作
による昇降操作構造では、圃場における畦際旋回走行の
際に機体の走行速度の低速切り換え操作やハンドル回動
操作等とともに、昇降レバー操作も短時間内で行わねば
ならず、操縦者に対する作業負担が大である欠点がある
ので、畦際旋回時の作業装置の昇降操作を操作が行い易
いスイッチ操作で行えるようにしたものである。ところ
で、この種の作業機にあっては、作業装置が接地下降状
態で作業走行する状態又は作業装置を大きく上昇させて
畦際旋回走行する状態以外に、例えば、対地作業機の一
例として乗用型田植機においては、作業装置〔苗植付装
置〕を対地所定高さにまで上昇させて苗補給作業を行っ
たり、施肥量調節等の作業を行う場合があるが、上記従
来構造では、このような途中レベルまでの上昇操作は、
前記昇降操作スイッチを用いて行うことができず、他の
手動昇降用操作具を用いて目測でレベル調節しながら作
業装置の上昇操作を行う必要があり、操作の煩わしさが
あり、改善の余地があった。本発明の目的は、合理的改
良によって、対地作業中の作業装置の昇降作動だけでな
く、調節作業の際における作業装置の昇降作業を能率よ
く行えるようにする点にある。The above-described lifting and lowering operation structure is different from the conventional lifting and lowering operation structure by the swinging operation of the lifting and lowering lever. In addition to the low-speed switching operation and handle rotation operation, the lifting lever operation must be performed within a short period of time, and there is a drawback that the work load on the pilot is large. Can be performed by a switch operation that is easy to perform. By the way, in this type of working machine, besides a state in which the working device travels while descending on the ground or a state in which the working device is largely lifted and turns around on a ridge, for example, a riding type machine as an example of a ground working machine is used. In the rice transplanter, the working device (seedling planting device) may be raised to a predetermined height with respect to the ground to perform seedling replenishment work or work such as fertilization amount adjustment. The ascent operation to the middle level is
It cannot be performed using the lifting operation switch, and it is necessary to perform the lifting operation of the working device while visually adjusting the level using another manual lifting operation tool, and there is room for operation, and there is room for improvement. was there. SUMMARY OF THE INVENTION An object of the present invention is to make it possible to efficiently perform not only the raising and lowering operation of a working device during ground work, but also the raising and lowering operation of a working device at the time of adjustment work, by a rational improvement.
【０００４】[0004]
【課題を解決するための手段】本発明の特徴構成は、冒
頭に記載した対地作業機において、下記〔イ〕，〔ロ〕
の各操作モードに夫々切り換え設定自在な操作モード切
り換え手段を備えてある点にある。 〔イ〕前記昇降操作スイッチの操作に基づいて前記対地
作業装置を接地下降状態と退避用第１上昇レベルとの間
で昇降操作を行うとともに、接地下降状態にあるとき前
記作業クラッチの入り操作を許容し且つ前記上昇レベル
では作業クラッチ入り操作を牽制する第１操作モード。 〔ロ〕前記昇降操作スイッチの操作に基づいて前記対地
作業装置を接地下降状態と調節作業用第２上昇レベルと
の間で昇降操作を行うとともに、前記第２上昇レベルに
あるとき前記作業クラッチの入り操作を許容する第２操
作モード。Means for Solving the Problems The feature of the present invention is that the ground work machine described at the beginning has the following features (a) and (b).
Operation mode switching means that can be set to switch to each operation mode. [B] Based on the operation of the lifting / lowering operation switch, the ground working device is raised / lowered between a ground-lowering state and a first evacuation elevating level, and when the ground clutch is in the ground-down state, the operation of engaging the work clutch is performed. A first operation mode in which the operation clutch engagement operation is tolerated at the above-mentioned ascending level. [B] Based on the operation of the raising / lowering operation switch, the ground working device is raised / lowered between a ground-lowering state and a second lifting level for adjustment work, and when the working clutch is in the second rising level, The second operation mode in which the entering operation is allowed.
【０００５】[0005]
【作用】前記操作モード切り換え手段を第１操作モード
に設定しておくと、昇降操作スイッチの操作に基づい
て、大きく対地上昇する退避用第１上昇レベルと接地状
態との間で昇降作動が行われ、しかも、対地作業装置が
接地下降する作業状態でのみ作業クラッチが入り操作可
能であり、昇降操作スイッチの操作により第１上昇レベ
ルまで退避上昇したときには、作業クラッチの入り操作
が不可能となるから、誤って、上昇中に作業クラッチが
入り作業上の不具合〔例えば、田植機にあっては苗の放
り投げ等〕が生じるのを防止できる。又、操作モード切
り換え手段を第２操作モードに設定しておくと、昇降操
作スイッチの操作に基づいて、調節作業に適した第２上
昇レベルと接地状態との間で作業装置の昇降作動が行わ
れる。この場合には、作業装置が対地浮上した状態であ
っても作業クラッチが入り操作可能となるから、対地浮
上した非作業姿勢において作業装置を駆動させながら調
節作業〔例えば、田植機にあっては苗の取り量調節や施
肥量調節等〕を行うことができる。When the operation mode switching means is set to the first operation mode, the elevating operation is performed between the evacuation first elevating level, which greatly rises to the ground, and the grounding state based on the operation of the elevating operation switch. In addition, the work clutch can be engaged only when the ground working device is in contact with the ground and descends, and when the elevating operation switch is operated to retreat to the first ascent level, the work clutch cannot be engaged. Therefore, it is possible to prevent the work clutch from being erroneously raised during climbing and causing a problem in work (for example, throwing of a seedling in a rice transplanter). Further, when the operation mode switching means is set to the second operation mode, the operation of the working device is performed between the second ascending level suitable for the adjusting operation and the grounding state based on the operation of the elevating operation switch. Will be In this case, the work clutch can be engaged and operated even when the working device is levitated above the ground, so that the adjusting operation is performed while driving the working device in the non-working posture where the surface is levitated (for example, in the case of a rice transplanter, Control of the amount of seedlings and fertilizer application).
【０００６】[0006]
【発明の効果】従って、作業走行中に作業装置を上昇さ
せたときに誤って作業クラッチが入り操作されることが
無く作業上の安全性が確保されるものでありながら、対
地作業走行中だけでなく、走行停止させて作業装置を少
し対地浮上させて行う調節作業にあっても、スイッチ操
作により煩わしさ無く作業装置を所望高さまで上昇させ
てクラッチ入り状態で調節作業が行える等、昇降操作ス
イッチの作業状況の違いに応じた使い分けによって作業
能率が向上するものとなった。Therefore, the safety of the work can be ensured without the work clutch being erroneously engaged when the working device is raised during the work traveling, and only when the ground work is being carried out. However, even in the case of adjustment work in which the running device is stopped and the working device is slightly levitated above the ground, the lifting and lowering operation can be performed such that the working device can be raised to a desired height by a switch operation and adjusted with the clutch engaged without any trouble. The work efficiency has been improved by properly using the switch according to the difference in the work situation.
【０００７】[0007]
【実施例】以下、実施例を図面に基いて説明する。図３
に対地作業機の一例である乗用型田植機を示している。
この田植機は、乗用型走行機体１に後部にリンク機構２
を介して苗植付装置３〔対地作業装置の一例〕をリフト
シリンダ４〔駆動機構の一例〕により駆動昇降自在並び
に前後軸芯周りでローリング自在に連結して、機体を走
行させながら泥面上に苗の植付けを行うよう構成してあ
る。走行機体１には前部にエンジン５を搭載するととも
に、このエンジン５の動力がベルト式無段変速装置６、
ミッションケース７を介して前後車輪８，９に伝えら
れ、且つ、電動モータ１０により入り切り操作される植
付クラッチ１１〔作業クラッチの一例〕を介して車速と
同期した出力が苗植付装置３に伝えられるよう伝動系を
構成してある。前記電動モータ１０のクラッチ入り切り
作動は操縦部に備えたクラッチスイッチ１７の操作に基
づいて、マイクロコンピュータを備えた制御装置１８に
より行うようにしてある。苗植付装置３は、左右横方向
に一定ストロークで往復横移動する苗のせ台１２、苗の
せ台１２の下端部から一株づつ苗を取り出して圃場に植
付ける植付機構１３、泥面上に接地追従しながら整地作
用を行う複数の接地フロート１４等を備えて成り、ステ
アリングハンドル１６の下側には揺動レバー式の昇降操
作スイッチＳＷ１が備えられ、このスイッチＳＷ１の操
作に基づいて苗植付装置３を所定上昇位置まで強制上昇
させる状態と接地下降させる状態とに切り換え自在に構
成してある。リンク機構２の機体側枢支箇所にはリンク
機構２の相対角度変化より苗植付装置３の対機体高さを
検出するポテンショメータ型リンク角度センサ１９を設
けてあり、車輪フェンダー２０の後部には、苗植付装置
３が機械的上昇限界近くまで上昇すると、リンク機構２
の途中部が接当してそのことを検出する上限スイッチＳ
Ｗ２を設けてある。これらの出力は前記制御装置１８に
入力される。又、苗植付け作業中に苗植付け深さ即ち、
接地状態にある苗植付装置３の対泥面高さが機体走行に
伴って常に一定に維持されるようリフトシリンダ４を駆
動制御する自動昇降制御手段Ａを備えてある。つまり、
後部横軸芯Ｘ周りで上下揺動自在に設けられる接地フロ
ート１４のうち左右中央に位置する接地フロート１４の
前部側の上方に、対地高さの変動に起因する上下揺動量
を検出するポテンショメータ型のフロートセンサ２４を
備え、このフロートセンサ２４の検出値がポテンショメ
−タ型感度調節器２５による設定値と合致するよう制御
装置１８によりリフトシリンダ４の電磁式油圧制御弁Ｖ
を切り換え制御するのである。Embodiments will be described below with reference to the drawings. FIG.
2 shows a riding rice transplanter which is an example of a ground work machine.
This rice transplanter has a riding mechanism 1 with a link mechanism 2 at the rear.
The seedling planting device 3 [an example of a ground working device] is connected via a lift cylinder 4 [an example of a driving mechanism] so that it can be driven up and down and rolled freely around the front and rear axes, so that the airframe can be moved on muddy surfaces. It is configured to plant seedlings. An engine 5 is mounted on the front of the traveling body 1 and the power of the engine 5 is transmitted by a belt-type continuously variable transmission 6,
An output transmitted to the front and rear wheels 8 and 9 via the transmission case 7 and synchronized with the vehicle speed via a planting clutch 11 [an example of a working clutch] operated to be turned on and off by the electric motor 10 is transmitted to the seedling planting device 3. The transmission system is configured to be transmitted. The clutch engagement / disengagement operation of the electric motor 10 is performed by a control device 18 having a microcomputer based on an operation of a clutch switch 17 provided in a control section. The seedling planting device 3 includes a seedling rest 12 that reciprocates horizontally with a constant stroke in the left-right direction, a planting mechanism 13 that takes out seedlings one by one from the lower end of the seedling rest 12 and planted them in a field. A plurality of grounding floats 14 and the like that perform a ground leveling operation while following the ground are provided. A swing lever type lifting / lowering operation switch SW1 is provided below the steering handle 16, and seedlings are operated based on the operation of the switch SW1. The planting device 3 is configured to be freely switchable between a state in which the planting device 3 is forcibly raised to a predetermined raising position and a state in which the planting device 3 is lowered. A potentiometer-type link angle sensor 19 for detecting the height of the seedling placement device 3 with respect to the body based on a change in the relative angle of the link mechanism 2 is provided at the body-side pivot point of the link mechanism 2. When the seedling planting device 3 rises to near the mechanical ascent limit, the link mechanism 2
Upper limit switch S which detects that the middle part of the
W2 is provided. These outputs are input to the controller 18. Also, during the seedling planting operation, the seedling planting depth, that is,
An automatic lifting / lowering control means A for controlling the driving of the lift cylinder 4 is provided so that the height of the mud surface of the seedling planting apparatus 3 in the ground contact state is always kept constant as the aircraft travels. That is,
A potentiometer for detecting a vertical swing amount caused by a change in the ground height above the front side of the ground float 14 located at the center in the left and right direction among the ground floats 14 provided to be vertically swingable around the rear horizontal axis X. Type float sensor 24. The electromagnetic hydraulic control valve V of the lift cylinder 4 is controlled by the control device 18 so that the detection value of the float sensor 24 matches the set value of the potentiometer type sensitivity adjuster 25.
Is controlled by switching.
【０００８】次に昇降操作スイッチＳＷ１による昇降作
動について説明する。この昇降操作スイッチＳＷ１によ
る昇降作動形態は２種類のモードに切り換え自在であ
り、各々の操作モードに夫々切り換え設定自在な操作モ
ード切り換え手段Ｂを制御装置１８に制御プログラム形
式で備えてあり、制御装置１８は以下のように制御を行
う。図２に示すように、先ず、機体操縦部に備えてある
モード切り換えスイッチ２６の操作位置を読み込み〔ス
テップ１〕、操作位置「」に設定されていれば、フロ
ートセンサ２４の検出情報から苗植付装置３が接地状態
にあると判断された状態から昇降操作スイッチＳＷ１が
操作されると、リンク角度センサ１９の検出情報を逐次
設定値と比較しながら、電磁制御弁Ｖを切り換えて苗取
り量の調節作業や施肥量調節等の調節作業が行い易い適
切な作業用所定レベルまで苗植付装置３を強制上昇さ
せ、その途中上昇位置で停止維持する〔ステップ２〜
５〕。この途中停止状態にあるとき、クラッチスイッチ
１７が「入」位置に操作されると植付クラッチが入り作
動するよう電動モータ１０を駆動制御し、「切」位置に
操作されるとクラッチ切り作動側に電動モータ１０を駆
動制御する〔ステップ６〜８〕。その後、昇降操作スイ
ッチＳＷ１が操作されると電磁制御弁Ｖを切り換えて苗
植付装置３が接地するまで下降させる〔ステップ９、１
０〕。モード切り換えスイッチ２６が操作位置「」に
あるときは、接地状態から昇降操作スイッチＳＷ１が操
作されると、上限スイッチＳＷ２が検出作動するまで苗
植付装置３を上昇作動させ、その上限位置で停止維持す
る〔ステップ１１〜１５〕。この上限停止モードにある
ときは、クラッチスイッチ１７の操作状態にかかわらず
植付クラッチ１１の入り作動禁止モードに設定される
〔ステップ１６〕。その後、昇降操作スイッチＳＷ１が
操作されると接地するまで苗植付装置３を下降作動させ
る〔ステップ１７、１８〕。この制御モードでは、苗植
付装置３が接地下降すると植付クラッチの入り作動が可
能な状態に設定されるとともに、上述した自動昇降制御
が実行される〔ステップ１９、２０〕。Next, the lifting operation by the lifting operation switch SW1 will be described. The lifting operation mode by the lifting operation switch SW1 can be freely switched between two types of modes, and the operation mode switching means B which can be set to be switched to each operation mode is provided in the control device 18 in the form of a control program. 18 controls as follows. As shown in FIG. 2, first, the operation position of the mode changeover switch 26 provided in the aircraft control section is read [Step 1]. If the operation position is set to "", the seedling planting is performed based on the detection information of the float sensor 24. When the raising / lowering operation switch SW1 is operated from the state in which the attachment device 3 is determined to be in the ground state, the electromagnetic control valve V is switched while sequentially comparing the detection information of the link angle sensor 19 with the set value, and the seedling collection amount The seedling planting device 3 is forcibly raised to a predetermined level for appropriate work that is easy to perform adjustment work such as adjustment work of fertilizer application amount and fertilizer application amount, and is stopped and maintained at a halfway up position [Step 2].
5]. When the clutch switch 17 is operated to the "on" position in the halfway stop state, the drive of the electric motor 10 is controlled so that the planting clutch is engaged. Next, the drive of the electric motor 10 is controlled [steps 6 to 8]. Thereafter, when the raising / lowering operation switch SW1 is operated, the electromagnetic control valve V is switched to lower the seedling planting device 3 until it comes into contact with the ground [steps 9, 1].
0]. When the mode changeover switch 26 is in the operation position "", when the lifting operation switch SW1 is operated from the ground state, the seedling planting device 3 is raised and operated until the upper limit switch SW2 is detected and stopped at the upper limit position. Maintain [Steps 11 to 15]. When in the upper limit stop mode, the on-coming inhibition mode of the planting clutch 11 is set regardless of the operation state of the clutch switch 17 [step 16]. Thereafter, when the raising / lowering operation switch SW1 is operated, the seedling planting device 3 is moved down until it comes into contact with the ground (steps 17, 18). In this control mode, when the seedling planting device 3 comes down on the ground, the planting clutch is set in a state where it can be engaged, and the above-described automatic elevating control is executed [steps 19 and 20].
【０００９】〔別実施例〕前記制御モードの切り換え用
操作は、専用の切り換えスイッチを設ける代わりに、昇
降操作スイッチＳＷ１の長時間の継続操作によりモード
切り換えする等、既存の操作具を利用してもよく、又、
前記途中停止レベルは人為調節具により適宜変更できる
ようにしてもよい。前記ステップ１９における植付クラ
ッチ１１の入り操作は、クラッチスイッチ１７によるも
のに代えて、例えば線引きマーカの選択操作等や接地下
降時点から所定時間経過後に自動的にクラッチ入りさせ
る等、その他の作業用操作に連動して入り作動させるよ
うにしてもよい。[Alternative Embodiment] The control mode switching operation is performed by using an existing operation tool, such as switching the mode by operating the lifting operation switch SW1 for a long time instead of providing a dedicated switch. Well,
The halfway stop level may be appropriately changed by an artificial adjuster. The engaging operation of the planting clutch 11 in the step 19 is not limited to the operation by the clutch switch 17, but may be, for example, a selection operation of a drawing marker or the like, and the clutch is automatically engaged after a lapse of a predetermined time from the time when the touchdown is performed. You may make it enter and operate in conjunction with operation.
【００１０】尚、特許請求の範囲の項に図面との対照を
容易にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。[0010] In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.
【図１】制御ブロック図FIG. 1 is a control block diagram
【図２】制御フローチャートFIG. 2 is a control flowchart.
【図３】田植機の側面図FIG. 3 is a side view of the rice transplanter.
１ 走行機体 ３ 対地作業装置 ４ 駆動機構 １１ 作業クラッチ Ｂ 操作モード切り換え手段 ＳＷ１ 昇降操作スイッチ DESCRIPTION OF SYMBOLS 1 Traveling body 3 Ground work device 4 Drive mechanism 11 Work clutch B Operation mode switching means SW1 Elevation operation switch
Claims (1)
により駆動昇降自在に対地作業装置（３）を連結すると
ともに、走行機体（１）からの動力を作業クラッチ（１
１）を介して入り切り操作自在に前記対地作業装置
（３）に伝えるよう構成し、前記対地作業装置（３）を
所定位置まで強制上昇させる状態と接地下降させる状態
とに切り換え自在な昇降操作スイッチ（ＳＷ１）を備え
てある対地作業機であって、 下記〔イ〕，〔ロ〕の各操作モードに夫々切り換え設定
自在な操作モード切り換え手段（Ｂ）を備えてある対地
作業機。 〔イ〕前記昇降操作スイッチ（ＳＷ１）の操作に基づい
て前記対地作業装置（３）を接地下降状態と退避用第１
上昇レベルとの間で昇降操作を行うとともに、接地下降
状態にあるとき前記作業クラッチ（１１）の入り操作を
許容し且つ前記上昇レベルでは作業クラッチ入り操作を
牽制する第１操作モード。 〔ロ〕前記昇降操作スイッチ（ＳＷ１）の操作に基づい
て前記対地作業装置（３）を接地下降状態と調節作業用
第２上昇レベルとの間で昇降操作を行うとともに、前記
第２上昇レベルにあるとき前記作業クラッチ（１１）の
入り操作を許容する第２操作モード。A driving mechanism (4) is provided at the rear of the traveling body (1).
The ground work device (3) is connected so as to be able to drive up and down freely, and the power from the traveling body (1) is supplied to the work clutch (1).
1) a lifting / lowering operation switch configured to transmit to the ground working device (3) so as to be capable of being turned on and off freely, and switchable between a state in which the ground working device (3) is forcibly raised to a predetermined position and a state in which the ground working device (3) is lowered; A ground working machine provided with (SW1), comprising an operation mode switching means (B) capable of switching and setting each of the following operation modes (a) and (b). [A] The ground working device (3) is brought into the ground-down state and the first evacuation state based on the operation of the elevation operation switch (SW1).
A first operation mode in which a raising / lowering operation is performed between a rising level and an operation for engaging the work clutch (11) is permitted when the vehicle is in a ground contact lowering state, and the operation for engaging the work clutch is suppressed at the elevation level. [B] Based on the operation of the lifting / lowering operation switch (SW1), the ground working device (3) is raised / lowered between a ground-lowering state and a second lifting level for adjustment work, and the second lifting level is set to the second lifting level. A second operation mode in which the engagement operation of the work clutch (11) is permitted at one time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02779293A JP3285988B2 (en) | 1993-02-17 | 1993-02-17 | Ground work machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02779293A JP3285988B2 (en) | 1993-02-17 | 1993-02-17 | Ground work machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06237614A JPH06237614A (en) | 1994-08-30 |
| JP3285988B2 true JP3285988B2 (en) | 2002-05-27 |
Family
ID=12230830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02779293A Expired - Fee Related JP3285988B2 (en) | 1993-02-17 | 1993-02-17 | Ground work machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3285988B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0519955A1 (en) * | 1990-03-14 | 1992-12-30 | GANDOLFI, Armando | Device for the inflow control of gas, steam or other fluids |
| JP6460686B2 (en) * | 2014-09-08 | 2019-01-30 | 三菱マヒンドラ農機株式会社 | Transplanter |
| JP2016019540A (en) * | 2015-09-28 | 2016-02-04 | 井関農機株式会社 | Seedling transplanter |
| JP6361758B2 (en) * | 2017-02-24 | 2018-07-25 | 井関農機株式会社 | Seedling transplanter |
-
1993
- 1993-02-17 JP JP02779293A patent/JP3285988B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06237614A (en) | 1994-08-30 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |