JP3964815B2 - Passenger rice transplanter - Google Patents

Passenger rice transplanter Download PDF

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Publication number
JP3964815B2
JP3964815B2 JP2003074530A JP2003074530A JP3964815B2 JP 3964815 B2 JP3964815 B2 JP 3964815B2 JP 2003074530 A JP2003074530 A JP 2003074530A JP 2003074530 A JP2003074530 A JP 2003074530A JP 3964815 B2 JP3964815 B2 JP 3964815B2
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Prior art keywords
planting device
lever
planting
operation side
temporary fixing
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Expired - Fee Related
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JP2003074530A
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Japanese (ja)
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JP2004275144A (en
Inventor
忠之 新古
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Yanma Agricultural Equipment Co Ltd
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Yanma Agricultural Equipment Co Ltd
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  • Lifting Devices For Agricultural Implements (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、乗用田植機に関する。
【0002】
【従来の技術】
従来、乗用田植機の一形態として、走行機体の後方に植付装置を昇降可能に連結すると共に、同走行機体に、変速レバーと植付装置昇降レバーとを設け、両レバーをバック連動機構を介して連動連結して、変速レバーの後進変速操作に植付装置昇降レバーの植付装置上昇操作を連動させたものがある(例えば、特許文献1参照)。
【0003】
すなわち、バック連動機構は、植付装置昇降レバーに植付装置上昇操作側に弾性付勢する上昇側引張スプリングを連結して、同植付装置昇降レバーにより植付装置上昇制御用の油圧バルブのスプールを確実に押圧作動させることができるようにしている。
【0004】
そして、植付装置昇降レバーに被仮止め体を設けて、植付装置下降操作さらには植付装置クラッチ入り操作時には、被仮止め体が仮止め体により仮止めされて、植付装置昇降レバーを操作位置に保持させることができるようにしている。
【0005】
ここで、仮止め体には、仮止め方向に弾性付勢する仮止め用引張スプリングを連結している。
【0006】
また、変速レバーに上記仮止め体を連動連結すると共に、同変速レバーに後進変速操作姿勢を保持するための後進姿勢保持手段を設けている。
【0007】
このようにして、バック連動機構では、変速レバーを後進変速操作すると、仮止め体が仮止め用引張スプリングの弾性付勢力に抗して仮止め解除動作され、そうすると植付装置昇降レバーが上昇側引張スプリングにより植付装置上昇側に回動されて、植付装置上昇制御用の油圧バルブのスプールを確実に押圧作動させて、植付装置を上昇作動させることができるようにしている。
【0008】
この際、変速レバーは、後進姿勢保持手段により後進変速操作姿勢に保持されるようにしている。
【0009】
【特許文献1】
特開2001−352810号公報
【0010】
【発明が解決しようとする課題】
ところが、上記したバック連動機構では、次のような課題を有している。
【0011】
すなわち、植付装置昇降レバーにより植付装置上昇制御用の油圧バルブのスプールを確実に押圧作動させるべく、上昇側引張スプリングの弾性付勢力を大きく設定している。
【0012】
そのために、かかる上昇側引張スプリングの弾性付勢力に抗して植付装置昇降レバーを植付装置下降操作位置さらには植付装置クラッチ入り操作位置に保持させるべく、仮止め用引張スプリングの弾性付勢力も大きく設定している。
【0013】
その結果、かかる仮止め用引張スプリングの弾性付勢力に抗して変速レバーを後進操作して、同仮止め体を仮止め解除動作させるのに大きな操作力を必要とすると共に、同変速レバーを後進姿勢に保持する後進姿勢保持手段の作用力を大きくする必要性が生じている。そのために、変速レバーを前進側に操作するのに大きな操作力を必要としている。
【0014】
【課題を解決するための手段】
そこで、本発明では、走行機体の後方に植付装置を昇降可能に連結すると共に、同走行機体に変速レバーと植付装置昇降レバーとを設け、両レバーをバック連動機構を介して連動連結して、変速レバーの後進変速操作に植付装置昇降レバーの植付装置上昇操作を連動させた乗用田植機であって、バック連動機構は、植付装置昇降レバーと一体的に回動すると共に植付装置上昇操作側に弾性付勢された被仮止め体と、同被仮止め体に係合して仮止めすると共に仮止め方向に弾性付勢された仮止め体と、同仮止め体と変速レバーとを連動連結する連動連結体と、上記被仮止め体に連結すると共に植付クラッチ切断方向に弾性付勢された植付クラッチ接続・切断アームとを具備する乗用田植機において、被仮止め体に、植付装置上昇操作側に弾性付勢する植付装置上昇操作側付勢手段を連結すると共に、同植付装置上昇操作側付勢手段に支点越え部材を設けて、植付装置昇降レバーの植付装置下降操作及び植付クラッチ接続操作時に、上記支点越え部材が植付装置昇降レバーの回動支点を越えて、同植付装置昇降レバーを被仮止め体を介して植付クラッチ接続操作側に弾性付勢すべく構成したことを特徴とする乗用田植機を提供するものである。
【0015】
また、本発明は、植付クラッチ接続・切断アームの切断方向への弾性付勢力は、植付装置昇降レバーの植付クラッチ接続操作側への弾性付勢力よりも大きくなるように設定したことにも特徴を有する。
【0016】
【発明の実施の形態】
以下に、本発明の実施の形態について説明する。
【0017】
すなわち、本発明に係る乗用田植機は、走行機体の後方に植付装置を昇降可能に連結すると共に、同走行機体に変速レバーと植付装置昇降レバーとを設け、両レバーをバック連動機構を介して連動連結して、変速レバーの後進変速操作に植付装置昇降レバーの植付装置上昇操作を連動させている。
【0018】
そして、バック連動機構は、植付装置昇降レバーと一体的に回動すると共に植付装置上昇操作側に弾性付勢された被仮止め体と、同被仮止め体に係合して仮止めすると共に仮止め方向に弾性付勢された仮止め体と、同仮止め体と変速レバーとを連動連結する連動連結体と、上記被仮止め体に連結すると共に植付クラッチ切断方向に弾性付勢された植付クラッチ接続・切断アームとを具備している。
【0019】
しかも、被仮止め体に、植付装置上昇操作側に弾性付勢する植付装置上昇操作側付勢手段を連結すると共に、同植付装置上昇操作側付勢手段に支点越え部材を設けて、植付装置昇降レバーの植付装置下降操作及び植付クラッチ接続操作時に、上記支点越え部材が植付装置昇降レバーの回動支点を越えて、同植付装置昇降レバーを被仮止め体を介して植付クラッチ接続操作側に弾性付勢すべく構成している。
【0020】
さらには、植付クラッチ接続・切断アームの切断方向への弾性付勢力は、植付装置昇降レバーの植付クラッチ接続操作側への弾性付勢力よりも大きくなるように設定している。
【0021】
【実施例】
以下に、本発明の実施例を、図面を参照しながら説明する。
【0022】
図1及び図2に示すAは、本発明に係る乗用田植機であり、同乗用田植機Aは、走行機体1の後方位置に昇降連結機構2を介して植付装置3を昇降自在に連結している。
【0023】
走行機体1は、図1及び図2に示すように、機体フレーム4上の前部に原動機部5を設けると共に、後部に運転部6を設けており、同機体フレーム4の左右方向の中央部には、前後方向に伸延するミッション部7を設け、同ミッション部7の前部にフロントアクスルケース8を介して左右一対の前車輪9,9を取り付けると共に、後部にリヤアクスルケース10を介して左右一対の後車輪11,11を取り付けている。
【0024】
機体フレーム4は、前後方向に伸延する左・右側フレーム形成体4a,4aと、両左・右側フレーム形成体4a,4aの後端部間に架設した背面視門型の後部フレーム形成体4bとを具備しており、左・右側フレーム形成体4a,4aの後半部は後上方へ上り傾斜状に形成している。
【0025】
原動機部5は、機体フレーム4上にエンジンE等を搭載し、同エンジンE等をボンネット12により被覆している。
【0026】
運転部6は、ボンネット12の後端部にダッシュボード13を連設し、同ダッシュボード13中にハンドルポスト14を立設し、同ハンドルポスト14中に挿通したハンドル支軸15の上端部にステアリングハンドル16を取り付け、同ステアリングハンドル16の後方位置に運転席17を配設している。18は変速レバー、19は苗継ぎレバー、20は、植付装置3の昇降・植付の入切・植付時の変速・線引きマーカ等の操作を行う植付装置昇降レバー、21は油圧感度調節レバー、22はブレーキペダル、23はアクセルペダル、24はステップ形成体である。
【0027】
ミッション部7は、前記エンジンEに連動連結して、同エンジンEから取り入れた動力を前・後車輪9,9,11,11と植付装置3に伝達するようにしている。
【0028】
昇降連結機構2は、図1及び図2に示すように、前後方向に伸延して上方に配置されるトップリンク30と、前後方向に伸延して下方に配置されるロワリンク31と、これらのリンク30,31を昇降作動させる昇降シリンダ(図示せず)を具備して、これらのリンク30,31を前記機体フレーム4の後部フレーム形成体4bと、後述する植付ヒッチ体32との間に介設している。
【0029】
植付装置3は、図1及び図2に示すように、植付ヒッチ体32に植付ミッションケース33を取り付け、同植付ミッションケース33に左右一対の植付ケース34,34を連動連結し、各植付ケース34,34の左右側後部にそれぞれロータリケース35,35,35,35を介して植付爪36,36,36,36を連動連結し、上記植付ヒッチ体32には苗載台37を前高後低の傾斜姿勢にて左右方向に往復動可能に取り付けている。38はセンターフロート、39はサイドフロートである。
【0030】
このようにして、苗載台37上に苗マット(図示せず)を載置して、同苗マットの下端部より植付爪36,36,36,36により苗株を切削すると共に、圃場へ植え付けて、四条の苗植付が行えるようにしている。
【0031】
上記のような構成において、図1及び図2に示すように、前記変速レバー18は、ステアリングハンドル16の下方に配置すると共に、機体フレーム4に左右方向に軸線を向けて架設した変速レバー支軸40(図3参照)に下端部を取り付けて、同変速レバー支軸40を中心に前後方向に回動自在となしている。
【0032】
そして、変速レバー18は、ミッション部7内に設けた変速機構にに変速連動機構(図示せず)を介して連動連結して、中立位置を中心に前方への前進変速操作と、後方への後進変速操作とが行えるようにしている。
【0033】
また、前記植付装置昇降レバー20は、図1及び図2に示すように、運転席17の右側方に配置すると共に、図3〜図6に示すように、機体フレーム4の一部を形成する右側フレーム形成体4aの後部に左右方向に軸線を向けて取り付けた昇降レバー支軸41に下端部を取り付けて、同昇降レバー支軸41を中心に前後方向に回動自在となしている。
【0034】
そして、植付装置昇降レバー20を支持する昇降レバー支軸41の中途部にスプール押圧作用片42を取り付ける一方、右側フレーム形成体4aの後部に植付装置上昇制御用(前記昇降シリンダの短縮作動制御用)の油圧バルブ43を取り付け、同油圧バルブ43に設けたスプール44を上記スプール押圧作用片42に対向させて配置している。
【0035】
このようにして、植付装置昇降レバー20を後方へ回動操作(植付装置上昇操作)すると、昇降レバー支軸41を介してスプール押圧作用片42が油圧バルブ43のスプール44を押圧して、昇降シリンダが短縮作動される。その結果、昇降連結機構2を介して植付装置3が上昇作動されるようにしている。45は植付装置上昇操作検出センサ、46はセンサ作用体である。
【0036】
また、植付装置昇降レバー20を前方へ回動操作(植付装置下降操作)すると、昇降レバー支軸41を介してスプール押圧作用片42が油圧バルブ43のスプール44から離隔して、植付装置3の自重により昇降シリンダが伸長作動され、昇降連結機構2を介して植付装置3が下降作動されるようにしている。
【0037】
しかも、上記した変速レバー18と植付装置昇降レバー20は、図3に示すように、バック連動機構47を介して連動連結して、変速レバー18の後進変速操作に植付装置昇降レバー20の植付装置上昇操作を連動させている。
【0038】
すなわち、バック連動機構47は、図3〜図6に示すように、植付装置昇降レバー20を支持する昇降レバー支軸41の左側端部に被仮止め体50の上部を取り付ける一方、右側フレーム形成体4aの後部に上下方向に伸延する仮止め体51の上端部を左右方向に軸線を向けた仮止め体支軸52を介して前後揺動自在に枢支し、同仮止め体51の中途部に設けた仮止めピン51aを、上記被仮止め体50の下端縁部に形成した複数の仮止め用凹部50aに係合させて仮止めするようにしている。
【0039】
ここで、被仮止め体50の上部端面より連結アーム50bを前方へ伸延させて形成し、同連結アーム50bの先端部と後部フレーム形成体4bに設けた連結片53の左側端部との間に、被仮止め体50を植付装置上昇操作側に弾性付勢する植付装置上昇操作側付勢手段54を介設している。55は連結ピンである。
【0040】
また、仮止め体51の下端部と右側フレーム形成体4aの後部に設けた連結片56との間には、仮止め体51の仮止めピン51aが被仮止め体50の仮止め用凹部50aに係合する方向に弾性付勢する仮止め用引張スプリング57を介設している。
【0041】
被仮止め体50の下部後端面より突設したロッド連結片50cと、ミッション部7内に設けた植付クラッチ(図示せず)に植付クラッチ操作軸58を介して連動連結した植付クラッチ接続・切断アーム59との間に、前後方向に伸延する連動ロッド60を介設している。
【0042】
ここで、植付クラッチ操作軸58の周面にはトルクバネ61を巻回して、同トルクバネ61の一端61aをミッション部7に係止する一方、他端61bを植付クラッチ接続・切断アーム59に係止して、同トルクバネ61により植付クラッチ接続・切断アーム59を植付クラッチ切断方向に回動させるべく弾性付勢している。
【0043】
また、変速レバー18と仮止め体51は連動連結体62を介して連動連結しており、同連動連結体62は、変速レバー18を支持する変速レバー支軸40にリンク機構63の一端を連結すると共に、同リンク機構63の他端に変速連動アーム63aを設けて、同変速連動アーム63aと前記仮止め体51の下部との間に連動連結ロッド64を介設している。
【0044】
ここで、連結ロッド64の後端部64aにはロッド伸延方向に沿って伸延する長孔65を形成し、同長孔65を介して仮止め体51の下部に設けた連結ピン66に連動連結ロッド64の後端部64aを連結している。
【0045】
このようにして、変速レバー18を後進変速操作すると、リンク機構63の変速連動アーム63aが上下方向の軸線廻りに前方へ回動して、連動連結ロッド64を仮止め用引張スプリング57の弾性付勢力に抗して前方へ摺動させ、同連動連結ロッド64が仮止め体51を仮止め体支軸52を中心に前方(図3及び図4において時計廻り)に回動させて、同仮止め体51の仮止めピン51aと被仮止め体50の仮止め用凹部50aとの係合を解除する。
【0046】
その結果、被仮止め体50は、植付装置上昇操作側付勢手段54とトルクバネ61との弾性付勢力により前方(図3及び図4において時計廻り)に回動され、昇降レバー支軸41を介してスプール押圧作用片42が油圧バルブ43のスプール44を押圧して、植付装置3を上昇させる。そして、植付クラッチも切断される。
【0047】
また、変速レバー18を前進変速操作すると、リンク機構63の変速連動アーム63aが上下方向の軸線廻りに後方へ回動して、連動連結ロッド64を後方へ摺動させるが、同連動連結ロッド64の後端部に形成した長孔65により仮止め体51は連動しない。
【0048】
上記のような構成において、本発明の要旨は、被仮止め体50に、植付装置上昇操作側に弾性付勢する植付装置上昇操作側付勢手段54を連結すると共に、同植付装置上昇操作側付勢手段54に支点越え部材67を設けて、植付装置昇降レバー20の植付装置下降操作及び植付クラッチ接続操作時に、上記支点越え部材67が植付装置昇降レバー20の回動支点を越えて、同植付装置昇降レバー20を被仮止め体50を介して植付クラッチ接続操作側に弾性付勢すべく構成したことにある。
【0049】
すなわち、植付装置上昇操作側付勢手段54は、図4及び図6に示すように、支点越え部材67と上昇操作用引張スプリング68とから形成しており、同支点越え部材67は、前後方向に伸延すると共に、中途部を上方へ凸状に湾曲させて形成して支点越え部67aとなし、支点越え部材67の前端部と被仮止め体50の連結アーム50bの前端部とを連結ピン55を介して連結する一方、支点越え部材67の後端部と後部フレーム形成体4bに設けた連結片53の左側端部との間に上記上昇操作用引張スプリング68を介設している。
【0050】
このようにして、変速レバー18を後進変速操作すると、前記したように仮止め体51の仮止めピン51aと被仮止め体50の仮止め用凹部50aとの係合を解除されて、被仮止め体50は、トルクバネ61の弾性付勢力により前方(図3及び図4において時計廻り)に回動され、同被仮止め体50の連結アーム50bが昇降レバー支軸41を中心に上方(図3及び図4において時計廻り)に回動され、同連結アーム50bの前端部に連結ピン55を介して連結した植付装置上昇操作側付勢手段54の支点越え部材67の前端部が、昇降レバー支軸41よりも上方に押し上げられて、支点越え状態を解除される。
【0051】
その結果、支点越え部材67が上昇操作用引張スプリング68と協働して被仮止め体50をさらに時計廻りに回動させて、昇降レバー支軸41を介してスプール押圧作用片42を油圧バルブ43のスプール44を押圧させる。
【0052】
また、植付装置昇降レバー20を植付装置下降操作及び植付クラッチ接続操作すると、植付装置上昇操作側付勢手段54に設けた支点越え部材67の支点越え部67aが植付装置昇降レバー20の回動支点である昇降レバー支軸41の直上方に位置すると共に、同支点越え部材67の前端部と後端部とを結ぶ仮想線Kが昇降レバー支軸41の下方に位置して、同仮想線Kの伸延方向に上昇操作用引張スプリング68が作用するため、被仮止め体50には後方(図3及び図4において反時計廻り)に回動させる弾性力(引張力)が作用することになる。
【0053】
その結果、植付装置昇降レバー20を被仮止め体50を介して植付クラッチ接続操作側に弾性付勢することができる。
【0054】
従って、被仮止め体50を仮止めして、植付装置昇降レバー20を植付装置下降操作位置ないしは植付クラッチ接続操作位置に保持する仮止め体51の仮止め方向への弾性付勢力を低減させることができる。
【0055】
その結果、かかる仮止め体51の仮止め方向への弾性付勢力に抗して変速レバー18を後進操作して、同仮止め体51を仮止め解除動作させる操作力を軽減することができると共に、同変速レバー18を後進姿勢に保持する後進姿勢保持手段(図示せず)の作用力を軽減することができる。そのため、後進姿勢保持手段の作用力が軽減される。
【0056】
ここで、植付クラッチ接続・切断アーム59の切断方向への弾性付勢力は、支点越え部材67の支点越え作用による植付装置昇降レバー20の植付クラッチ接続操作側への弾性付勢力よりも大きくなるように設定している。
【0057】
このようにして、植付クラッチ接続・切断アーム59の切断方向への弾性付勢力が、植付装置昇降レバー20の植付クラッチ接続操作側への弾性付勢力よりも大きくなるように設定しているため、これらの弾性付勢力の差の大きさ分だけ仮止め体の仮止め方向の弾性付勢力を軽減することができて、変速レバー18の後進変速操作力を軽減することができる。
【0058】
その結果、後進姿勢保持手段の作用力を軽減することができる。
【0059】
図7は、他実施例としての植付装置上昇操作側付勢手段54を示しており、同植付装置上昇操作側付勢手段54は、支点越え部材67と上昇操作用引張スプリング68とを、同上昇操作用引張スプリング68を形成する線材により一体成形して、製造コストを安価なものとしている。
【0060】
また、本実施例では、変速連動アーム63aと仮止め体51の下部との間に連動連結ロッド64を介設しているが、同連動連結ロッド64に代えて連動ワイヤを設けることもできる。
【0061】
この場合、連動ワイヤには引張方向の弾性付勢力を付与して、変速レバー18を前進変速操作した際に弛緩されて撓まないようにする。そうすることによって、ステアリング機構との干渉等を防止することができる。
【0062】
【発明の効果】
(1)請求項1記載の本発明では、被仮止め体に、植付装置上昇操作側に弾性付勢する植付装置上昇操作側付勢手段を連結すると共に、同植付装置上昇操作側付勢手段に支点越え部材を設けて、植付装置昇降レバーの植付装置下降操作及び植付クラッチ接続操作時に、上記支点越え部材が植付装置昇降レバーの回動支点を越えて、同植付装置昇降レバーを被仮止め体を介して植付クラッチ接続操作側に弾性付勢すべく構成している。
【0063】
このようにして、変速レバーの後進変速操作に植付装置昇降レバーの植付装置上昇操作を連動させることができると共に、同植付装置昇降レバーを被仮止め体を介して植付装置上昇操作側付勢手段により植付クラッチ切断操作側に弾性付勢することができる。
【0064】
また、植付装置昇降レバーの植付装置下降操作及び植付クラッチ接続操作時には、植付装置上昇操作側付勢手段に設けた支点越え部材が植付装置昇降レバーの回動支点を越えて、同植付装置昇降レバーを被仮止め体を介して植付クラッチ接続操作側に弾性付勢することができる。
【0065】
従って、被仮止め体を仮止めして、植付装置昇降レバーを植付装置下降操作位置ないしは植付クラッチ接続操作位置に保持する仮止め体の仮止め方向への弾性付勢力を低減させることができる。
【0066】
その結果、かかる仮止め体の仮止め方向への弾性付勢力に抗して変速レバーを後進操作して、同仮止め体を仮止め解除動作させる操作力を軽減することができると共に、同変速レバーを後進姿勢に保持する後進姿勢保持手段の作用力を軽減することができる。そのため、後進姿勢保持手段の作用力が軽減される。
【0067】
(2)請求項2記載の本発明では、植付クラッチ接続・切断アームの切断方向への弾性付勢力は、植付装置昇降レバーの植付クラッチ接続操作側への弾性付勢力よりも大きくなるように設定している。
【0068】
このようにして、植付クラッチ接続・切断アームの切断方向への弾性付勢力が、植付装置昇降レバーの植付クラッチ接続操作側への弾性付勢力よりも大きくなるように設定しているため、これらの弾性付勢力の差の大きさ分だけ仮止め体の仮止め方向の弾性付勢力を軽減することができて、変速レバーの後進変速操作力を軽減することができる。
【0069】
その結果、後進姿勢保持手段の作用力を軽減することができる。
【図面の簡単な説明】
【図1】本発明に係る乗用田植機の側面図。
【図2】同乗用田植機の平面図。
【図3】バック連動機構の側面図。
【図4】同バック連動機構の一部拡大側面図。
【図5】スプール押圧作用片の側面説明図。
【図6】バック連動機構の一部拡大平面図。
【図7】他実施例としての植付装置上昇操作側付勢手段の側面図。
【符号の説明】
A 乗用田植機
1 走行機体
2 昇降連結機構
3 植付装置
4 機体フレーム
5 原動機部
6 運転部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a riding rice transplanter.
[0002]
[Prior art]
Conventionally, as a form of riding rice transplanter, a planting device is connected to the rear of the traveling machine body so that it can be moved up and down, and a shifting lever and a planting apparatus lifting lever are provided on the traveling machine body, and both levers are provided with a back interlocking mechanism. There is one in which the planting device lifting operation of the planting device lifting lever is interlocked with the reverse shifting operation of the gear shifting lever (see, for example, Patent Document 1).
[0003]
That is, the back interlocking mechanism is configured such that a lifting tension spring that is elastically biased toward the planting device lifting operation side is connected to the planting device lifting lever, and a hydraulic valve for controlling the planting device lift is controlled by the planting device lifting lever. The spool can be surely pressed and operated.
[0004]
Then, the planting device lifting lever is provided with a temporarily fixed body, and the planting device lifting lever is temporarily fixed by the temporary fixing body during the planting device lowering operation or the planting device clutch engaging operation. Can be held in the operating position.
[0005]
Here, a temporary fixing tension spring that is elastically biased in the temporary fixing direction is connected to the temporary fixing body.
[0006]
In addition, the temporary stop body is interlocked and connected to the speed change lever, and a reverse movement attitude holding means for holding the reverse speed shift operation attitude is provided on the speed change lever.
[0007]
In this way, in the back interlocking mechanism, when the speed change lever is operated in reverse, the temporary fixing body is released from the temporary fixing against the elastic biasing force of the temporary fixing tension spring. It is rotated by the tension spring to the planting device ascending side, and the spool of the hydraulic valve for planting device ascent control is surely pressed to operate the planting device.
[0008]
At this time, the shift lever is held in the reverse shift operation posture by the reverse posture holding means.
[0009]
[Patent Document 1]
JP 2001-352810 A
[Problems to be solved by the invention]
However, the above-described back interlocking mechanism has the following problems.
[0011]
That is, the elastic biasing force of the ascending-side tension spring is set large so that the spool of the hydraulic valve for controlling the planting device ascent is pressed by the planting device lifting lever.
[0012]
For this purpose, the tensioning spring for temporary fixing is provided with elasticity so as to hold the planting device elevating lever against the elastic biasing force of the ascending-side tension spring in the planting device lowering operation position or the planting device clutching operation position. The power is also set large.
[0013]
As a result, a large operating force is required to reversely operate the temporary locking body by reversely operating the transmission lever against the elastic biasing force of the temporary fixing tension spring, and to release the temporary locking body. There is a need to increase the acting force of the reverse posture holding means for holding the reverse posture. Therefore, a large operating force is required to operate the shift lever forward.
[0014]
[Means for Solving the Problems]
Therefore, in the present invention, the planting device is connected to the rear of the traveling machine body so that the planting apparatus can be moved up and down. The back-shifting operation of the shifting lever is linked to the lifting operation of the planting device lifting lever, and the back interlocking mechanism rotates integrally with the planting device lifting lever and is planted. A temporarily fixed body elastically biased to the attaching device raising operation side, a temporary fixed body engaged and temporarily fixed to the temporary fixed body and elastically biased in the temporary fixing direction, and the temporary fixed body; In a riding rice transplanter comprising: an interlocking coupling body for interlockingly coupling a speed change lever; and a planting clutch connection / disconnection arm coupled to the temporarily fixed body and elastically biased in the planting clutch cutting direction. The stopper is elastic on the planting device ascending operation side. The planting device lifting operation side biasing means is coupled, and the planting device lifting operation side biasing means is provided with a fulcrum over-member, so that the planting device lifting lever is lowered and the planting clutch is connected. Sometimes, the fulcrum crossing member exceeds the pivoting fulcrum of the planting device lifting lever, and the planting device lifting lever is configured to be elastically biased to the planting clutch connection operation side via the temporarily fixed body. The characteristic rice paddy machine is provided.
[0015]
Further, according to the present invention, the elastic urging force in the cutting direction of the planting clutch connection / disconnection arm is set to be larger than the elastic urging force to the planting clutch connection operation side of the planting device elevating lever. Also has features.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
[0017]
That is, the riding rice transplanter according to the present invention connects the planting device to the rear of the traveling machine body so that the planting apparatus can be raised and lowered, and is provided with a shift lever and a planting device raising and lowering lever on the traveling machine body. The planting device raising operation of the planting device raising / lowering lever is linked to the reverse shifting operation of the gear shifting lever.
[0018]
The back interlocking mechanism rotates integrally with the planting device lifting / lowering lever and is elastically biased to the planting device lifting operation side, and is temporarily engaged with the temporarily mounted body. And a temporary fixing body elastically biased in the temporary fixing direction, an interlocking connecting body for interlockingly connecting the temporary fixing body and the transmission lever, and connected to the temporary fixed body and elastically applied in the cutting clutch cutting direction. And a planted clutch connecting / disconnecting arm.
[0019]
Moreover, a planting device lifting operation side biasing means that elastically biases the body to be fastened to the planting device lifting operation side is connected, and a fulcrum crossing member is provided on the planting device lifting operation side biasing means. When the planting device lifting lever is lowered and the planting clutch is connected, the fulcrum crossing member exceeds the pivoting fulcrum of the planting device lifting lever, and the planting device lifting lever is It is comprised so that it may elastically urge to the planting clutch connection operation side.
[0020]
Furthermore, the elastic urging force in the cutting direction of the planting clutch connecting / disconnecting arm is set to be larger than the elastic urging force of the planting device elevating lever to the planting clutch connecting operation side.
[0021]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0022]
1 and 2 is a riding rice transplanter according to the present invention, and the riding rice transplanter A is connected to a rear position of the traveling machine body 1 via a lifting connection mechanism 2 so as to be able to move up and down. is doing.
[0023]
As shown in FIGS. 1 and 2, the traveling machine body 1 is provided with a prime mover part 5 on the front part of the machine body frame 4 and a driving part 6 on the rear part. Is provided with a mission part 7 extending in the front-rear direction, and a pair of left and right front wheels 9, 9 are attached to the front part of the mission part 7 via a front axle case 8, and left and right via a rear axle case 10 at the rear part. A pair of rear wheels 11, 11 are attached.
[0024]
The body frame 4 includes left and right frame forming bodies 4a and 4a extending in the front-rear direction, and a rear-view portal rear frame forming body 4b installed between the rear ends of the left and right frame forming bodies 4a and 4a. And the rear half of the left and right frame forming bodies 4a, 4a is formed in an upwardly inclined manner.
[0025]
The prime mover unit 5 is equipped with an engine E or the like on the body frame 4 and is covered with a bonnet 12.
[0026]
The driving unit 6 has a dashboard 13 connected to the rear end of the bonnet 12, a handle post 14 is erected in the dashboard 13, and an upper end of the handle support shaft 15 inserted into the handle post 14 is installed. A steering handle 16 is attached, and a driver's seat 17 is disposed behind the steering handle 16. 18 is a shifting lever, 19 is a seedling lever, 20 is a planting device lifting lever for operating the planting device 3 for raising / lowering, planting on / off, shifting during planting, drawing marker, etc., 21 is a hydraulic sensitivity An adjustment lever, 22 is a brake pedal, 23 is an accelerator pedal, and 24 is a step forming body.
[0027]
The mission unit 7 is linked to the engine E so as to transmit power taken from the engine E to the front and rear wheels 9, 9, 11, 11 and the planting device 3.
[0028]
As shown in FIGS. 1 and 2, the elevating connection mechanism 2 includes a top link 30 that extends in the front-rear direction and is disposed above, a lower link 31 that extends in the front-rear direction and is disposed below, and these links. An elevating cylinder (not shown) for elevating 30 and 31 is provided, and these links 30 and 31 are interposed between the rear frame forming body 4b of the body frame 4 and a planting hitch body 32 to be described later. Has been established.
[0029]
As shown in FIGS. 1 and 2, the planting device 3 has a planting mission case 33 attached to a planting hitch body 32 and a pair of left and right planting cases 34, 34 linked to the planting mission case 33. Planting claws 36, 36, 36, 36 are interlocked and connected to the left and right rear portions of the planting cases 34, 34 via rotary cases 35, 35, 35, 35, respectively. A mounting table 37 is attached so as to be capable of reciprocating in the left-right direction in a leaning posture of front and rear and low. 38 is a center float and 39 is a side float.
[0030]
In this way, a seedling mat (not shown) is placed on the seedling placing stand 37, and the seedlings are cut from the lower end of the seedling mat by the planting claws 36, 36, 36, 36, and the field. Planted so that Shijo seedlings can be planted.
[0031]
In the above-described configuration, as shown in FIGS. 1 and 2, the speed change lever 18 is disposed below the steering handle 16 and is provided with a speed change lever support shaft that is erected on the body frame 4 with the axis line in the left-right direction. A lower end portion is attached to 40 (see FIG. 3), and is rotatable in the front-rear direction around the shift lever support shaft 40.
[0032]
The speed change lever 18 is linked to a speed change mechanism provided in the mission section 7 via a speed change interlock mechanism (not shown), and forward shift operation forward and backward with respect to the neutral position. Reverse gear shifting operation can be performed.
[0033]
The planting device elevating lever 20 is disposed on the right side of the driver's seat 17 as shown in FIGS. 1 and 2, and forms part of the body frame 4 as shown in FIGS. A lower end portion is attached to an elevating lever support shaft 41 attached to the rear portion of the right frame forming body 4a with the axis line directed in the left-right direction, and the elevating lever support shaft 41 is pivotable in the front-rear direction.
[0034]
The spool pressing action piece 42 is attached to the middle part of the lifting lever support shaft 41 that supports the planting device lifting lever 20, while the planting device lifting control is performed at the rear portion of the right frame forming body 4a (the shortening operation of the lifting cylinder). A hydraulic valve 43 for control) is attached, and a spool 44 provided in the hydraulic valve 43 is disposed so as to face the spool pressing action piece 42.
[0035]
Thus, when the planting device lifting lever 20 is rotated backward (planting device raising operation), the spool pressing action piece 42 presses the spool 44 of the hydraulic valve 43 via the lifting lever support shaft 41. The elevating cylinder is shortened. As a result, the planting device 3 is lifted through the lifting / lowering connection mechanism 2. 45 is a planting device raising operation detection sensor, and 46 is a sensor acting body.
[0036]
Further, when the planting device lifting lever 20 is rotated forward (planting device lowering operation), the spool pressing action piece 42 is separated from the spool 44 of the hydraulic valve 43 via the lifting lever support shaft 41 and planted. The lifting cylinder is extended by the weight of the device 3, and the planting device 3 is lowered by way of the lifting connection mechanism 2.
[0037]
In addition, as shown in FIG. 3, the shift lever 18 and the planting device lifting lever 20 are interlocked and connected via a back interlocking mechanism 47 so that the reverse movement operation of the shifting lever 18 can be performed in the reverse shift operation of the planting device lifting lever 20. The planting device raising operation is linked.
[0038]
That is, as shown in FIGS. 3 to 6, the back interlocking mechanism 47 attaches the upper portion of the temporarily fixed body 50 to the left end portion of the lifting lever support shaft 41 that supports the planting device lifting lever 20, while the right frame The upper end portion of the temporary fixing body 51 extending in the vertical direction at the rear part of the formed body 4a is pivotally supported by the temporary fixing body supporting shaft 52 with the axis lined in the left-right direction so as to be swingable back and forth. Temporary fixing pins 51a provided in the middle are engaged with a plurality of temporary fixing recesses 50a formed at the lower end edge of the temporarily fixed body 50 to be temporarily fixed.
[0039]
Here, the connecting arm 50b is formed by extending forward from the upper end surface of the temporarily fixed body 50, and between the front end portion of the connecting arm 50b and the left end portion of the connecting piece 53 provided on the rear frame forming body 4b. Further, a planting device raising operation side urging means 54 for elastically urging the temporarily fixed body 50 toward the planting device raising operation side is provided. 55 is a connecting pin.
[0040]
Further, a temporary fixing pin 51a of the temporary fixing body 51 is provided between the lower end portion of the temporary fixing body 51 and the connecting piece 56 provided at the rear portion of the right frame forming body 4a. Temporary fastening tension springs 57 that are elastically urged in a direction to engage with each other are provided.
[0041]
A rod coupling piece 50c projecting from the lower rear end face of the temporarily fixed body 50 and a planting clutch linked to a planting clutch (not shown) provided in the mission section 7 via a planting clutch operating shaft 58. An interlocking rod 60 extending in the front-rear direction is interposed between the connection / disconnection arm 59.
[0042]
Here, a torque spring 61 is wound around the peripheral surface of the planting clutch operating shaft 58, and one end 61a of the torque spring 61 is locked to the transmission section 7, while the other end 61b is engaged with the planting clutch connecting / disconnecting arm 59. The planting clutch connection / disconnection arm 59 is elastically biased by the torque spring 61 so as to rotate in the planting clutch disconnection direction.
[0043]
Further, the speed change lever 18 and the temporary fixing body 51 are interlocked and connected via an interlocking connecting body 62, and the interlocking connecting body 62 connects one end of the link mechanism 63 to the speed changing lever spindle 40 that supports the speed changing lever 18. At the same time, a shift interlocking arm 63a is provided at the other end of the link mechanism 63, and an interlocking connecting rod 64 is interposed between the shift interlocking arm 63a and the lower portion of the temporary fixing body 51.
[0044]
Here, a long hole 65 extending along the rod extending direction is formed in the rear end portion 64a of the connecting rod 64, and interlockingly connected to the connecting pin 66 provided at the lower portion of the temporary fixing body 51 through the long hole 65. The rear end portion 64a of the rod 64 is connected.
[0045]
Thus, when the speed change lever 18 is operated in reverse, the speed change interlocking arm 63a of the link mechanism 63 rotates forward about the vertical axis, and the interlocking connecting rod 64 is elastically attached to the tension spring 57 for temporary fixing. The interlocking connecting rod 64 rotates the temporary fixing body 51 forward (clockwise in FIGS. 3 and 4) about the temporary fixing body support shaft 52, and slides forward against the force. The engagement between the temporary fixing pin 51a of the fixing body 51 and the temporary fixing recess 50a of the temporarily fixed body 50 is released.
[0046]
As a result, the temporarily fixed body 50 is rotated forward (clockwise in FIGS. 3 and 4) by the elastic urging force of the planting device ascending operation side urging means 54 and the torque spring 61, and the elevating lever support shaft 41. The spool pressing action piece 42 presses the spool 44 of the hydraulic valve 43 to raise the planting device 3. And a planting clutch is also cut | disconnected.
[0047]
Further, when the speed change lever 18 is operated to move forward, the speed change interlocking arm 63a of the link mechanism 63 rotates rearward about the vertical axis, and the interlocking connecting rod 64 slides rearward. The temporary fixing body 51 is not interlocked by the long hole 65 formed in the rear end portion.
[0048]
In the configuration as described above, the gist of the present invention is that the planting device lifting operation side biasing means 54 that elastically biases the planted object 50 to the planting device lifting operation side and the planting device The lifting operation side urging means 54 is provided with a fulcrum crossing member 67 so that the fulcrum crossing member 67 rotates the planting device lifting lever 20 when the planting device lifting lever 20 is lowered and the planting clutch is connected. The planting device raising / lowering lever 20 is configured to be elastically biased to the planting clutch connection operation side via the temporarily fixed body 50 beyond the dynamic fulcrum.
[0049]
That is, as shown in FIGS. 4 and 6, the planting device ascending operation side urging means 54 is formed of a fulcrum exceeding member 67 and a lifting operation tension spring 68. In addition to extending in the direction, the middle part is curved upward to form a fulcrum exceeding part 67a, and the front end part of the fulcrum exceeding member 67 and the front end part of the connection arm 50b of the temporarily fixed body 50 are connected. On the other hand, the lifting operation tension spring 68 is interposed between the rear end portion of the fulcrum crossing member 67 and the left end portion of the connecting piece 53 provided on the rear frame forming body 4b. .
[0050]
As described above, when the speed change lever 18 is operated in reverse, the engagement between the temporary fixing pin 51a of the temporary fixing body 51 and the temporary fixing recess 50a of the temporary fixed body 50 is released, as described above. The stop body 50 is rotated forward (clockwise in FIGS. 3 and 4) by the elastic biasing force of the torque spring 61, and the connecting arm 50b of the temporarily fixed body 50 is moved upward with the lifting lever support shaft 41 as a center (see FIG. 3 and FIG. 4), the front end of the fulcrum member 67 of the planting device lifting operation side biasing means 54 connected to the front end of the connecting arm 50b via the connecting pin 55 is moved up and down. The lever support shaft 41 is pushed upward to release the state beyond the fulcrum.
[0051]
As a result, the fulcrum crossing member 67 cooperates with the lifting operation tension spring 68 to further rotate the temporarily fixed body 50 in the clockwise direction, and the spool pressing action piece 42 is moved to the hydraulic valve via the lifting lever support shaft 41. 43 spools 44 are pressed.
[0052]
Further, when the planting device raising / lowering lever 20 is operated to lower the planting device and the planting clutch is connected, the fulcrum exceeding part 67a of the fulcrum exceeding member 67 provided in the planting device raising operation side biasing means 54 is moved to the planting device raising / lowering lever. An imaginary line K connecting the front end portion and the rear end portion of the lifting point supporting member 67 is positioned below the lifting lever supporting shaft 41 and is located directly above the lifting lever supporting shaft 41 which is the 20 rotation support point. Since the lifting operation tension spring 68 acts in the extending direction of the imaginary line K, the temporarily fixed body 50 has an elastic force (tensile force) that rotates backward (counterclockwise in FIGS. 3 and 4). Will work.
[0053]
As a result, the planting device raising / lowering lever 20 can be elastically biased to the planting clutch connection operation side via the temporarily fixed body 50.
[0054]
Therefore, the temporarily fixed body 50 is temporarily fixed, and the elastic biasing force in the temporary fixing direction of the temporary fixing body 51 that holds the planting device lifting lever 20 at the planting device lowering operation position or the planting clutch connection operation position is applied. Can be reduced.
[0055]
As a result, it is possible to reduce the operating force for reversely operating the temporary fixing body 51 by operating the shift lever 18 backward against the elastic biasing force of the temporary fixing body 51 in the temporary fixing direction. Thus, the acting force of the reverse posture holding means (not shown) that holds the speed change lever 18 in the reverse posture can be reduced. For this reason, the acting force of the backward movement posture holding means is reduced.
[0056]
Here, the elastic urging force in the cutting direction of the planting clutch connecting / cutting arm 59 is more than the elastic urging force of the planting device lifting lever 20 to the planting clutch connection operation side due to the fulcrum exceeding action of the fulcrum exceeding member 67. It is set to be larger.
[0057]
In this way, the elastic urging force in the cutting direction of the planting clutch connecting / disconnecting arm 59 is set to be larger than the elastic urging force of the planting device elevating lever 20 to the planting clutch connecting operation side. Therefore, the elastic urging force in the temporary fixing direction of the temporary fixing body can be reduced by the magnitude of the difference between these elastic urging forces, and the reverse shift operating force of the transmission lever 18 can be reduced.
[0058]
As a result, the acting force of the backward posture holding means can be reduced.
[0059]
FIG. 7 shows a planting device raising operation side urging means 54 as another embodiment. The planting device raising operation side urging means 54 includes a fulcrum member 67 and a lifting operation tension spring 68. The assembling operation tension spring 68 is integrally formed with the wire material, thereby reducing the manufacturing cost.
[0060]
In this embodiment, the interlocking connecting rod 64 is interposed between the shift interlocking arm 63a and the lower portion of the temporary fixing body 51. However, an interlocking wire can be provided instead of the interlocking connecting rod 64.
[0061]
In this case, an elastic urging force in the pulling direction is applied to the interlocking wire so that it is relaxed and not bent when the speed change lever 18 is moved forward. By doing so, interference with the steering mechanism can be prevented.
[0062]
【The invention's effect】
(1) In this invention of Claim 1, while connecting the planting device raising operation side biasing means elastically biased to the planting device raising operation side to the temporarily fixed body, the planting device raising operation side When the urging means is provided with a fulcrum crossing member, the fulcrum crossing member exceeds the rotation fulcrum of the planting device lifting lever when the planting device lifting lever is lowered and the planting clutch is connected. The attaching device raising / lowering lever is configured to be elastically urged to the planting clutch connection operation side via the temporarily fixed body.
[0063]
Thus, the planting device raising / lowering lever can be interlocked with the reverse shifting operation of the shifting lever, and the planting device raising / lowering lever can be operated via the temporarily fixed body. The side biasing means can elastically bias the planting clutch cutting operation side.
[0064]
Further, at the time of planting device lowering operation and planting clutch connection operation of the planting device lifting lever, the fulcrum overpass member provided on the planting device lifting operation side biasing means exceeds the rotation fulcrum of the planting device lifting lever, The planting device raising / lowering lever can be elastically biased to the planting clutch connection operation side via the temporarily fixed body.
[0065]
Therefore, the temporarily biased body is temporarily fixed, and the elastic biasing force in the temporary fixing direction of the temporary fixing body holding the planting device lifting lever at the planting device lowering operation position or the planting clutch connecting operation position is reduced. Can do.
[0066]
As a result, it is possible to reduce the operating force to reverse the temporary fixing body by operating the shift lever reversely against the elastic biasing force of the temporary fixing body in the temporary fixing direction. The acting force of the reverse posture holding means for holding the lever in the reverse posture can be reduced. For this reason, the acting force of the backward movement posture holding means is reduced.
[0067]
(2) In the present invention according to claim 2, the elastic biasing force in the cutting direction of the planting clutch connecting / disconnecting arm is larger than the elastic biasing force of the planting device elevating lever to the planting clutch connecting operation side. It is set as follows.
[0068]
In this way, the elastic urging force in the cutting direction of the planting clutch connection / disconnection arm is set to be larger than the elastic urging force to the planting clutch connection operation side of the planting device lifting lever. The elastic urging force in the temporary fixing direction of the temporary fixing body can be reduced by the magnitude of the difference between these elastic urging forces, and the reverse shift operation force of the shift lever can be reduced.
[0069]
As a result, the acting force of the backward posture holding means can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view of a riding rice transplanter according to the present invention.
FIG. 2 is a plan view of the passenger rice transplanter.
FIG. 3 is a side view of a back interlocking mechanism.
FIG. 4 is a partially enlarged side view of the back interlocking mechanism.
FIG. 5 is an explanatory side view of a spool pressing action piece.
FIG. 6 is a partially enlarged plan view of a back interlocking mechanism.
FIG. 7 is a side view of a planting device lifting operation side biasing unit as another embodiment.
[Explanation of symbols]
A Passenger rice transplanter 1 Traveling machine body 2 Elevating connection mechanism 3 Planting device 4 Machine body frame 5 Motor unit 6 Driving unit

Claims (2)

走行機体の後方に植付装置を昇降可能に連結すると共に、同走行機体に変速レバーと植付装置昇降レバーとを設け、両レバーをバック連動機構を介して連動連結して、変速レバーの後進変速操作に植付装置昇降レバーの植付装置上昇操作を連動させた乗用田植機であって、
バック連動機構は、植付装置昇降レバーと一体的に回動すると共に植付装置上昇操作側に弾性付勢された被仮止め体と、同被仮止め体に係合して仮止めすると共に仮止め方向に弾性付勢された仮止め体と、同仮止め体と変速レバーとを連動連結する連動連結体と、上記被仮止め体に連結すると共に植付クラッチ切断方向に弾性付勢された植付クラッチ接続・切断アームとを具備する乗用田植機において、
被仮止め体に、植付装置上昇操作側に弾性付勢する植付装置上昇操作側付勢手段を連結すると共に、同植付装置上昇操作側付勢手段に支点越え部材を設けて、植付装置昇降レバーの植付装置下降操作及び植付クラッチ接続操作時に、上記支点越え部材が植付装置昇降レバーの回動支点を越えて、同植付装置昇降レバーを被仮止め体を介して植付クラッチ接続操作側に弾性付勢すべく構成したことを特徴とする乗用田植機。
The planting device is connected to the rear of the traveling machine body so that it can be raised and lowered, and a shifting lever and a planting device raising / lowering lever are provided on the traveling machine body, and both levers are interlocked and connected via a back interlocking mechanism. A riding rice transplanter in which the planting device lifting lever is operated in conjunction with the shifting operation,
The back interlocking mechanism rotates integrally with the planting device raising / lowering lever and is elastically biased to the planting device ascending operation side, and is engaged with and temporarily fixed to the temporarily fixed body. A temporary fixing body elastically biased in the temporary fixing direction, an interlocking connecting body for interlockingly connecting the temporary fixing body and the transmission lever, and connected to the temporary fixed body and elastically biased in the planting clutch cutting direction. In the rice paddy planter equipped with a planting clutch connection / disconnection arm,
A planting device lifting operation side biasing means that elastically biases the object to be fastened to the planting device lifting operation side is connected, and a fulcrum crossing member is provided on the planting device lifting operation side biasing means. At the time of planting device lowering operation and planting clutch connection operation of the planting device lifting lever, the fulcrum crossing member exceeds the pivoting fulcrum of the planting device lifting lever, and the planting device lifting lever is moved through the temporarily fixed body. A riding rice transplanter characterized in that it is configured to elastically bias the planting clutch connection operation side.
植付クラッチ接続・切断アームの切断方向への弾性付勢力は、植付装置昇降レバーの植付クラッチ接続操作側への弾性付勢力よりも大きくなるように設定したことを特徴とする請求項1記載の乗用田植機。The elastic urging force in the cutting direction of the planting clutch connecting / disconnecting arm is set to be larger than the elastic urging force of the planting device elevating lever to the planting clutch connecting operation side. The passenger rice transplanter described.
JP2003074530A 2003-03-18 2003-03-18 Passenger rice transplanter Expired - Fee Related JP3964815B2 (en)

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JP2015223088A (en) * 2014-05-26 2015-12-14 株式会社クボタ Paddy field work machine
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