JP3600784B2

JP3600784B2 - Farm work machine

Info

Publication number: JP3600784B2
Application number: JP2000245356A
Authority: JP
Inventors: 勉谷澤; 元紀佐藤
Original assignee: 松山株式会社
Priority date: 2000-08-11
Filing date: 2000-08-11
Publication date: 2004-12-15
Anticipated expiration: 2020-08-11
Also published as: JP2002051603A

Description

【０００１】
【発明の属する技術分野】
本発明は、圃場を平らに整地する農作業機に関する。
【０００２】
【従来の技術】
従来、この種の農作業機は、例えば、圃場を耕耘するロータリー等の耕耘体を備え、この耕耘体の上方位置には土の飛散を防止するカバー体が設けられ、この耕耘体の後方位置には圃場を平らに整地する整地体が設けられている。そして、整地体は、カバー体に連結された弾性連結体に取り付けられ、この整地体は弾性連結体にて吊下げ保持されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記従来の農作業機は、単に整地体を吊下げ保持した構成であるので、例えば、圃場の状態に適切に対応できないおそれがある問題を有している。
【０００４】
本発明は、このような点に鑑みなされたもので、圃場の状態に適切に対応できる農作業機を提供することを目的とする。
【０００５】
【課題を解決するための手段】
請求項１記載の農作業機は、圃場を耕耘砕土する耕耘体と、この耕耘体の後方位置に位置し、圃場を平らに整地する整地体と、この整地体の左右水平方向の回動中心軸線の位置変更を規制する規制姿勢および前記回動中心軸線の位置変更を許容する許容姿勢に設定される設定体とを備え、前記整地体は、左右水平方向の回動中心軸線に沿った係合軸部を有し、前記設定体は、前記係合軸部と係脱自在に係合して前記係合軸部の位置変更を規制する規制姿勢に設定されるとともに、前記係合軸部との係合が解かれて前記係合軸部の位置変更を許容する許容姿勢に設定されるものであり、前記設定体が規制姿勢に設定された状態時には、前記係合軸部は移動が規制された位置変更規制状態にあるがその定位置での回動は可能となっており、前記整地体はその係合軸部を中心として後端側が昇降するように回動するものである。
【０００６】
そして、この構成では、設定体が規制姿勢に設定されると、整地体の左右水平方向の回動中心軸線の位置変更が規制され、設定体が許容姿勢に設定されると、整地体の左右水平方向の回動中心軸線の位置変更が許容される。
【０００７】
請求項２記載の農作業機は、請求項１記載の農作業機において、設定体は、回動操作により整地体の左右水平方向の回動中心軸線の位置変更を規制する規制姿勢に設定され回動操作により前記回動中心軸線の位置変更を許容する許容姿勢に設定される回動可能な回動操作設定体であるものである。
【０００８】
そして、この構成では、回動操作設定体が回動操作により規制姿勢に設定されると、整地体の左右水平方向の回動中心軸線の位置変更が規制され、回動操作設定体が回動操作により許容姿勢に設定されると、整地体の左右水平方向の回動中心軸線の位置変更が許容される。
【０００９】
請求項３記載の農作業機は、請求項２記載の農作業機において、耕耘体の上方位置に位置して土の飛散を防止するカバー体と、このカバー体の後端部に前端部が連結され、前記耕耘体の後方位置に位置する整地体の前端部に後端部が連結された連結体とを備え、前記整地体の係合軸部は、前記連結体の略側方位置に配置されているものである。
【００１０】
そして、この構成では、回動操作設定体の規制姿勢設定時に、連結体と耕耘体との間の空間が著しく増大するのを防止でき、耕耘体による砕土性が良好である。
【００１１】
【発明の実施の形態】
以下、本発明の農作業機の一実施の形態の構成を図面を参照して説明する。
【００１２】
図１ないし図３において、１は代掻装置等の農作業機で、この農作業機１は、図示しないトラクタの牽引により水田圃場上を移動しつつ、水田圃場を耕耘砕土して水田圃場の表面部を水平面状に平らに整地するものである。
【００１３】
この農作業機１は、図示しないトラクタに着脱可能に装着される機体２を備え、この機体２は、農作業機１の左右水平方向に長手方向を有する細長筒形状の主フレーム３を有している。
【００１４】
この主フレーム３の長手方向の中央部側には、入力軸５を有するミッション６が設けられているとともにトラクタ連結部としての三点連結部７が設けられている。この三点連結部７は、トップピン８を有するトップマスト９、ロワピン10を有する左右一対のロワアーム11，11等にて構成されている。
【００１５】
また、主フレーム３の長手方向の両端部には、上下方向に長手方向を有する側面視細長略矩形状の互いに離間対向した左右一対の側板フレームとしてのチェーンケース14およびブラケット15の各々の上端部が固着されている。
【００１６】
これらチェーンケース14およびブラケット15の下端部間には、水田圃場を耕耘砕土する耕耘体としての耕耘ロータリー作業体16が回転可能に設けられている。この耕耘ロータリー作業体16は、チェーンケース14およびブラケット15の下端部間に軸架された水平状の回転軸17を有し、この回転軸17には複数の耕耘爪18が軸方向に互いに間隔を介して並設され、各耕耘爪18が回転軸17から放射状に突出している。
【００１７】
また、チェーンケース14およびブラケット15の各々の下部後端部には、互いに離間対向した左右一対の板状の突出部としてのサイドカバー体21，21が後方に向って突設されており、これら両サイドカバー体21は、耕耘ロータリー作業体16の側方に位置し、チェーンケース14およびブラケット15とともに耕耘ロータリー作業体16から放出される土の側方への飛散を防止する。さらに、サイドカバー体21の外側面には、図１に示されるように、両端面を開口した略円筒形状の支持部材23が取り付けられており、この支持部材23は、上端開口部が前斜め上方に開口しかつ下端開口部が後斜め下方に開口した所定の傾斜状態とされている。また、この支持部材23にて設定体としての回動操作設定体24が回動可能に支持されている。この回動操作設定体24は、細長棒状部材が三箇所で折り曲げられて側面視略二等辺三角形状に形成されたもので、図示しない自由端部側が支持部材23内に差し込まれており、等しい二辺の連結部側には係合部25が形成されている。なお、支持部材23および回動操作設定体24にて軸部保持手段26が構成されている。
【００１８】
また一方、チェーンケース14およびブラケット15の上下方向の略中央部間には、左右方向に長手方向を有する細長略矩形板状で幅方向中央側が上方に膨出したやや湾曲状のカバー体としての上部カバー体31が略水平面状に設けられている。この上部カバー体31は、耕耘ロータリー作業体16の上方位置でこの耕耘ロータリー作業体16に沿って配置され、耕耘ロータリー作業体16から放出される土の上方への飛散を防止する。
【００１９】
また、この上部カバー体31の後端部には、左右方向に長手方向を有する細長略矩形板状のゴム板等の弾性変形可能な連結体としての弾性連結体32の前端部が連結固定されている。この弾性連結体32は、図１に示されるように、前端側から後端側に向って徐々に下方に傾斜した傾斜状に配置され、左右一対のサイドカバー体21，21間に略位置している。
【００２０】
さらに、この弾性連結体32の後端部には、幅方向の中間二箇所で屈曲した左右方向に長手方向を有する細長略矩形板状の整地基板34の前端部が連結固定されている。この整地基板34は、図１に示されるように、前端側から後端側に向って徐々に下方に傾斜した傾斜状に配置され、左右一対のサイドカバー体21より後方位置に位置している。
【００２１】
また、整地基板34の長手方向の両端部には、互いに離間対向した左右一対の整地側板35，35が固着され、この整地側板35の前側部はサイドカバー体21と弾性連結体32との間に入り込んでいる。さらに、整地側板35の上部外側面には、軸方向が左右水平方向に一致した断面円形の固定用ピン等の係合軸部36，36が一体に突出形成されている。左右一対の係合軸部36の整地側板35からの突出寸法は、それぞれ、図３に示されるように、係合軸部36の先端がサイドカバー体21の外側面より側方に突出する寸法に設定されている。また、係合軸部36は、弾性連結板32の前後方向中央部よりやや後端側寄りの部分或いは前後方向中央部の側方位置に配置されている。なお、整地基板34、整地側板35、係合軸部36等にて均平板等の整地体としての第１の整地体38が構成され、この第１の整地体38は、耕耘ロータリー作業体16の後方位置に位置し、耕耘ロータリー作業体16から放出される土を下方に誘導して略水平面状に平らに整地する。
【００２２】
そして、第１の整地体38の整地側板35の係合軸部36は、回動操作設定体24の係合部25と係脱自在の構成とされており、この回動操作設定体24は、例えば作業者の手で支持部材23の軸方向に一致した回動中心軸線を中心として一方向へ回動操作すると、自由端部側のばね作用でサイドカバー体21側に付勢されてこのサイドカバー体21に圧接した状態となって、係合部25が整地側板35の係合軸部36と係脱自在に係合し、これにより、この回動操作設定体24は、第１の整地体38の左右水平方向の回動中心軸線（係合軸部36の中心軸線）Ｘの位置変更、つまり、回動中心軸線Ｘに沿った係合軸部36の位置変更を規制する規制姿勢に設定された状態となる（図１、図５）。
【００２３】
なお、この回動操作設定体24が規制姿勢に設定された状態時には、係合軸部36は、規制姿勢にある回動操作設定体24の係合部25と係合し、この係合部25とサイドカバー体21の後端縁部とで挟持された状態にあり、上方や後方等への移動が規制された位置変更規制状態にあるが、その定位置での回動は可能となっている。すなわち、この回動操作設定体24が規制姿勢に設定された状態時には、第１の整地体38は、係合軸部36を中心として後端側が昇降するように回動可能な状態にある。なお、第１の整地体38の回動時には、この第１の整地体38の回動に応じて弾性連結体32が長手方向に沿って折れ曲がるようにして弾性変形する。
【００２４】
また、回動操作設定体24は、例えば作業者の手で支持部材23の軸方向に一致した回動中心軸線を中心として一方向とは反対の他方向へ回動操作すると、自由端部側のばね作用でサイドカバー体21側に付勢されてこのサイドカバー体21に圧接した状態となって、整地側板35の係合軸部36との係合が解かれ、これにより、第１の整地体38の左右水平方向の回動中心軸線（係合軸部36の中心軸線）Ｘの位置変更、つまり、回動中心軸線Ｘに沿った係合軸部36の位置変更を許容する許容姿勢に設定された状態となる（図４）。なお、この状態時においては、第１の整地体38は、弾性連結体32にて吊下げ保持された状態にある。
【００２５】
さらに、第１の整地体38の後端部には、左右方向に長手方向を有する細長略矩形板状のレーキ板等の第２の整地体40が、左右一対の回動アーム41，41等からなる連結手段42を介して回動可能に連結されている。なお、回動アーム41は整地側板35に取り付けられた回動規制手段43で解除可能に回動規制されている。そして、この第２の整地体40は、第１の整地体38の後方位置に水平整地姿勢で位置し、第１の整地体38にて整地された水田圃場の表面部を水平面状に平らに整地する。
【００２６】
なお、上部カバー体31の上面部における左右両側のアーム取付け部45には左右一対の第１の支持アーム46，46の前端部が回動可能に取り付けられ、第１の支持アーム46の後端部に第１の吊持杆47の上端部が回動可能に連結され、第１の吊持杆47の下端部が第１の整地体38の上面部に回動可能に連結されている。そして、第１の支持アーム46、第１の吊持杆47、コイルスプリング48等にて第１の整地体接地圧調節手段49が構成されており、この第１の整地体接地圧調節手段49にて第１の整地体38の圃場面との接地圧が調節可能となっている。
【００２７】
また、上部カバー体31の上面部における長手方向中央のアーム取付け部50には第２の支持アーム51の前端部が回動可能に取り付けられ、第２の支持アーム51の後端部に第２の吊持杆52の上端部が回動可能に連結され、第２の吊持杆52の下端部が第２の整地体40の上面部に回動可能に連結されている。そして、第２の支持アーム51、第２の吊持杆52、図示しないガススプリング等にて第２の整地体接地圧調節手段54が構成されており、この第２の整地体接地圧調節手段54にて第２の整地体40の圃場面との接地圧が調節可能となっている。また、第２の整地体40は、図示しない操作ハンドルの操作により、整地作業をする水平整地姿勢と土寄せ作業をする略鉛直状の土寄せ姿勢とに切り換えることができる。
【００２８】
次に、上記一実施の形態の動作を説明する。
【００２９】
図示しないトラクタの三点リンク機構（作業機昇降用油圧装置）に機体２の三点連結部７を連結するとともに、図示しないトラクタのＰＴＯ軸に入力軸５を図示しない動力伝達軸等を介して連結することにより、トラクタからの駆動力で耕耘ロータリー作業体16を作動させる。
【００３０】
砕土を中心とする荒代作業時には、図５に示すように、回動操作設定体24を規制姿勢に設定し、第１の整地体38の係合軸部36の位置変更を規制した状態とする。
【００３１】
そして、トラクタの走行によりこのトラクタとともに農作業機１全体を水田圃場に沿って前方に移動させると、耕耘ロータリー作業体16にて耕耘砕土作業が行われ、第１の整地体38および第２の整地体40にて整地作業が行われ、水田圃場の表面部が水平面状に平らに整地される。
【００３２】
この荒代作業時において、第１の整地体38が、整地基板34への土塊の衝突等に基づいて所定の大きさ以上の土圧を受けた場合、第１の整地体38は左右水平方向の回動中心軸線Ｘを中心として後端側が上昇する方向に回動し、この回動に応じて弾性連結体32が係合軸部36と対向する位置、例えば後端近傍位置でこの弾性連結体32の長手方向に沿ってやや折れ曲がる。
【００３３】
しかし、弾性連結体32の所定部分、つまり係合軸部36より前方に位置する部分は変形せず、この弾性連結体32の所定部分と耕耘ロータリー作業体16との間の空間Ａは大きくならないため、この空間Ａは所定の大きさに維持される。その結果、耕耘ロータリー作業体16の土塊の持ち回り性が悪くなるのを防止でき、砕土性が良好である。
【００３４】
また、均平を中心とする仕上げ代作業時には、図４に示すように、回動操作設定体24を許容姿勢に設定し、第１の整地体38の係合軸部36の位置変更を許容した状態とする。
【００３５】
そして、トラクタの走行によりこのトラクタとともに農作業機１全体を水田圃場に沿って前方に移動させると、耕耘ロータリー作業体16にて耕耘砕土作業が行われ、第１の整地体38および第２の整地体40にて整地作業が行われ、水田圃場の表面部が水平面状に平らに整地される。
【００３６】
この仕上げ代作業時には、第１の整地体38は、弾性連結体32にて吊下げ保持されたフリー状態にあり、弾性連結体32の弾性変形に基づいて、後端側が昇降するように左右水平方向の回動中心軸線を中心として回動したり、左右両端側が昇降するように前後水平方向の回動中心軸線を中心として回動したりする。その結果、弾性連結体32の弾性変形により圃場の凸凹を吸収でき、圃場の凸凹でトラクタが傾いても、第１の整地体38および第２の整地体40を所定の水平状態に維持でき、均平性が良好である。
【００３７】
また、係合軸部36の位置変更規制が解除されたフリー状態では、圃場の軟らかくなった表面部に、第１の整地体38の重量が無理に作用せず、良好な仕上げ面が得られる。さらに、このフリー状態では、第１の整地体38の左右水平方向の回動中心軸線が弾性連結体32の前端部である上端部に位置するので、第１の整地体38の整地基板34および弾性連結体32からなる前後方向に比較的長い距離の整地部で、耕耘ロータリー作業体16からの土を比較的長い距離で柔軟に下方に誘導でき、均平性を向上できる。
【００３８】
このように、上記一実施の形態によれば、機体１の耕耘ロータリー作業体16の側方の左右一対のサイドカバー体21に設けた左右一対の回動操作設定体24を、荒代作業時に一方向に回動操作することにより規制姿勢に設定して第１の整地体38の左右水平方向の回動中心軸線Ｘの位置変更を規制したり、仕上げ代作業時に他方向に回動操作することにより許容姿勢に設定して第１の整地体38の左右水平方向の回動中心軸線Ｘの位置変更を許容したりできるので、作業状況等に応じた圃場の状態に適切に対応でき、圃場の状態に応じた適切な整地作業ができる。また、回動操作設定体24の設定は、作業者の手でワンタッチに行うことができ、操作性も良好である。
【００３９】
なお、上記実施の形態においては、第１の整地体38の係合軸部36を解除可能に保持する軸部保持手段26は、支持部材23および回動操作設定体24を有する構成として説明したが、例えば、図６ないし図８に示す軸部保持手段26aでもよい。
【００４０】
この軸部保持手段26aは、回動可能な設定体としての回動操作設定体61を有し、この回動操作設定体61は、細長略矩形板状に形成され、長手方向の中央近傍でやや折り曲げられ、この折曲げにより形成された傾斜部分が摘み部62となっている。回動操作設定体61における摘み部62とは反対側である基端側の端部には軸挿通用孔部63が開口形成されており、この軸挿通用孔部63内に、サイドカバー体21の外側面から側方に向って突出し軸方向が農作業機１の左右水平方向に一致した支軸部65が挿通され、回動操作設定体61はこの支軸部65を中心として回動可能となっている。この支軸部65の先端部にはリング状の抜け止め部材66が嵌着され、この抜け止め部材66と回動操作設定体61の軸挿通用孔部63の周縁部分との間に付勢手段としてのコイルばね67が圧縮された状態で装着されており、このコイルばね67は、回動操作設定体61をサイドカバー体21側に付勢し、回動操作設定体61はサイドカバー体21の外側面と圧接している。
【００４１】
また、回動操作設定体61の長手方向の中央部には、軸保持用孔部68が開口形成されている。一方、サイドカバー体21の外側面には、許容姿勢設定用の軸部70が側方に向って突出するように設けられ、この軸部70は支軸部65の上方位置でこの支軸部65と平行に位置している。
【００４２】
そして、回動操作設定体61は、作業状況等に応じた圃場の状態により、一方向への回動操作により第１の整地体38の係合軸部36に係脱自在に嵌合により係合して第１の整地体38の左右水平方向の回動中心軸線Ｘの位置変更を規制する規制姿勢に設定され（図６、図８）、一方向とは反対の他方向への回動操作により係合軸部36との係合が解かれて第１の整地体38の左右水平方向の回動中心軸線Ｘの位置変更を許容する許容姿勢に設定される（図７）。
【００４３】
すなわち、この回動操作設定体61は、規制姿勢に設定する場合、例えば作業者は、許容姿勢にある回動操作設定体61の摘み部62を手で摘み、コイルばね67の付勢力に抗してサイドカバー体21から離し、回動操作設定体61の軸保持用孔部68と軸部70との係合を解く。その後、支軸部65を中心として一方向へ回動操作することにより、回動操作設定体61の軸保持用孔部68内に整地側板35の係合軸部36を挿通させ、この回動操作設定体61と係合軸部36とを係合させる。これにより、回動操作設定体61は、第１の整地体38の左右水平方向の回動中心軸線（係合軸部36の中心軸線）Ｘの位置変更、つまり、係合軸部36の位置変更を規制する規制姿勢に設定された状態となる。
【００４４】
なお、この回動操作設定体61が規制姿勢に設定された状態時には、係合軸部36は、規制姿勢にある回動操作設定体61の軸保持用孔部68と挿通係合し、この軸保持用孔部68にて保持された状態にあり、上方や後方等への移動が規制された位置変更規制状態にあるが、その定位置での回動は可能となっている。すなわち、この回動操作設定体61が規制姿勢に設定された状態時には、第１の整地体38は、係合軸部36を中心として後端側が昇降するように回動可能な状態にある。
【００４５】
また、回動操作設定体61は、許容姿勢に設定する場合、例えば作業者は、規制姿勢にある回動操作設定体61の摘み部62を手で摘み、コイルばね67の付勢力に抗して、回動操作設定体61の軸保持用孔部68と係合軸部36との係合を解く。その後、支軸部65を中心として他方向へ回動操作することにより、回動操作設定体61の軸保持用孔部68内にサイドカバー体21の軸部70を挿通させ、この回動操作設定体61と軸部70とを係合させる。これにより、回動操作設定体61は、第１の整地体38の左右水平方向の回動中心軸線（係合軸部36の中心軸線）Ｘの位置変更、つまり、係合軸部36の位置変更を許容する許容姿勢に設定された状態となる。この状態時においては、第１の整地体38は、弾性連結体32にて吊下げ保持された状態にある。
【００４６】
そして、図６ないし図８に示す軸部保持手段26aを備えた構成でも、図３等に示す軸部保持手段26を備えた構成と同様、作業状況等に応じた圃場の状態に適切に対応でき、圃場の状態に応じた適切な整地作業をできる等の作用効果を奏することができる。
【００４７】
また、上記いずれの実施の形態においても、第１の整地体38は、ゴム板等の弾性連結体32の後端部に連結した構成として説明したが、例えば、図９に示すように、軸方向が前後水平方向に一致した支軸部71を中心として左右両端側が昇降するように回動するとともに軸方向が左右水平方向に一致した支軸部72を中心として後端側が昇降するように回動する金属製の連結体32aの後端部に連結した構成でもよい。なお、図９に示す回動操作設定体24は、規制姿勢に設定されて第１の整地体38の左右水平方向の回動中心軸線Ｘ、すなわち、第１の整地体38の整地基板34の上端部である前端部の左右両端から側方に突出した係合軸部36，36の位置変更を規制する一方、許容姿勢に設定されて係合軸部36，36の位置変更を許容する。
【００４８】
さらに、図１０に示すように、第１の整地体38は、軸方向が左右水平方向に一致した支軸部73を中心として後端側が昇降するように回動するとともに支軸部73がサイドカバー体21の長孔74に案内されることで昇降する金属製の連結体32bの後端部に連結した構成でもよい。なお、図１０に示す回動操作設定体24は、図９に示す回動操作設定体24と同様、規制姿勢に設定されて第１の整地体38の左右水平方向の回動中心軸線Ｘ、すなわち、第１の整地体38の整地基板34の上端部である前端部の左右両端から側方に突出した係合軸部36，36の位置変更を規制する一方、許容姿勢に設定されて係合軸部36，36の位置変更を許容する。
【００４９】
また、上記いずれの実施の形態でも、回動操作設定体24，61等の設定体は、回動操作により規制姿勢および許容姿勢に設定する構成として説明したが、例えば、図示しないが、スライド操作で設定する構成、或いは、第１の整地体38の孔部に対して設定体に形成した挿入部を抜き差し操作することで設定する構成等でもよい。
【００５０】
さらに、図示しない設定用駆動源を設けて、この設定用駆動源からの駆動力で設定体の姿勢を自動的に設定するようにしてもよい。
【００５１】
【発明の効果】
請求項１記載の発明によれば、設定体を規制姿勢に設定して整地体の左右水平方向の回動中心軸線の位置変更を規制したり、設定体を許容姿勢に設定して整地体の左右水平方向の回動中心軸線の位置変更を許容したりできるので、圃場の状態に適切に対応できる。
【００５２】
請求項２記載の発明によれば、回動操作設定体を回動操作により規制姿勢に設定して整地体の左右水平方向の回動中心軸線の位置変更を規制したり、回動操作設定体を回動操作により許容姿勢に設定して整地体の左右水平方向の回動中心軸線の位置変更を許容したりできるので、簡単な操作で、圃場の状態により一層適切に対応できる。
【００５３】
請求項３記載の発明によれば、回動操作設定体の規制姿勢設定時に、連結体と耕耘体との間の空間が著しく増大するのを防止でき、耕耘体による砕土性を良好にできる。
【図面の簡単な説明】
【図１】本発明の農作業機の一実施の形態の側面図である。
【図２】同上農作業機の後面図である。
【図３】同上農作業機の一部拡大後面図である。
【図４】同上農作業機の設定体を許容姿勢に設定した状態の側面図である。
【図５】同上農作業機の設定体を規制姿勢に設定した状態の側面図である。
【図６】本発明の農作業機の他の実施の形態の一部拡大後面図である。
【図７】同上農作業機の設定体を許容姿勢に設定した状態の側面図である。
【図８】同上農作業機の設定体を規制姿勢に設定した状態の側面図である。
【図９】本発明の農作業機のさらに他の実施の形態の後方からみた斜視図である。
【図１０】本発明の農作業機のさらに他の実施の形態の後方からみた斜視図である。
【符号の説明】
１農作業機
16 耕耘体としての耕耘ロータリー作業体
24，61 設定体としての回動操作設定体
31 カバー体としての上部カバー体
32 連結体としての弾性連結体
36 係合軸部
38 整地体としての第１の整地体
Ｘ回動中心軸線[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an agricultural work machine for leveling a field.
[0002]
[Prior art]
Conventionally, this kind of agricultural working machine includes, for example, a tilling body such as a rotary for tilling a field, and a cover body for preventing scattering of soil is provided at a position above the tilling body, and at a rear position of the tilling body. Is provided with a leveling body for leveling the field. The terrain is attached to an elastic connector connected to the cover, and the terrain is suspended and held by the elastic connector.
[0003]
[Problems to be solved by the invention]
However, since the conventional agricultural working machine has a configuration in which the ground preparation is simply suspended and held, there is a problem that it may not be possible to appropriately cope with, for example, a field state.
[0004]
The present invention has been made in view of such a point, and an object of the present invention is to provide an agricultural work machine that can appropriately cope with a field condition.
[0005]
[Means for Solving the Problems]
The agricultural work machine according to claim 1, a tilling body for cultivating and cultivating a field, a terrain body located at a rear position of the cultivating body and leveling the field flatly, and a rotation center axis in the left-right horizontal direction of the terrain body. And a setting body that is set to a restricting posture for restricting a change in the position of the turning center axis and an allowable posture for allowing a position change of the turning center axis. A setting portion, wherein the setting body is set to a restricting posture that removably engages with the engagement shaft portion and regulates a position change of the engagement shaft portion; of are those engagement is set to the allowable position for permitting the repositioning of the engaging shaft portion is released, wherein the setting member is at the set state to the restricting position, the engaging shaft portion is moved Although it is in the restricted position change restricted state, it is possible to rotate at the fixed position, and Body is to rotate to the rear end side moves up and down about its engagement shaft portion.
[0006]
In this configuration, when the setting body is set in the regulating posture, the change in the position of the rotation center axis in the left-right horizontal direction of the terrain body is regulated, and when the setting body is set in the allowable posture, the left and right A change in the position of the center axis of rotation in the horizontal direction is allowed.
[0007]
The agricultural working machine according to claim 2 is the agricultural working machine according to claim 1, wherein the setting body is set in a regulating posture for restricting a change in the position of a horizontal center axis in the left-right horizontal direction of the terrain body by a rotating operation. The rotation operation setting body is a rotatable rotation operation setting body that is set to an allowable posture that allows the position of the rotation center axis to be changed by an operation.
[0008]
In this configuration, when the rotation operation setting body is set to the restricting posture by the rotation operation, the position change of the left and right horizontal rotation center axis of the terrain body is restricted, and the rotation operation setting body rotates. When the allowable posture is set by the operation, the position change of the center axis of rotation of the terrain body in the left-right horizontal direction is permitted.
[0009]
請 Motomeko 3 agricultural machine in that in agricultural machine according to claim 2, wherein a cover body to prevent positional to scattering of soil above the plowing耘体, the front end to the rear end of the cover body And a connected body having a rear end connected to a front end of the terrain body positioned at the rear position of the tilling body, and an engagement shaft portion of the terrain body is located at a substantially lateral position of the connected body. It is what is arranged.
[0010]
With this configuration, it is possible to prevent the space between the connecting body and the tilling body from being significantly increased at the time of setting the restricting posture of the rotation operation setting body, and the crushing property of the tilling body is good.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a configuration of an embodiment of the agricultural working machine of the present invention will be described with reference to the drawings.
[0012]
1 to 3, reference numeral 1 denotes an agricultural work machine such as a scratching device. The agricultural work machine 1 cultivates and crushes a paddy field while moving on the paddy field by towing a tractor (not shown). To level the ground in a horizontal plane.
[0013]
The farm work machine 1 includes a machine body 2 detachably mounted on a tractor (not shown). The machine body 2 has an elongated cylindrical main frame 3 having a longitudinal direction in the left-right horizontal direction of the farm work machine 1. .
[0014]
At the center of the main frame 3 in the longitudinal direction, a transmission 6 having an input shaft 5 is provided, and a three-point connecting portion 7 as a tractor connecting portion is provided. The three-point connecting portion 7 includes a top mast 9 having a top pin 8, a pair of left and right lower arms 11, 11 having a lower pin 10, and the like.
[0015]
At both ends in the longitudinal direction of the main frame 3, upper ends of a chain case 14 and a bracket 15 as a pair of left and right side plate frames which are elongated and substantially rectangular in a side view and have a longitudinal direction in the vertical direction and are opposed to each other. Is fixed.
[0016]
Between the lower ends of the chain case 14 and the bracket 15, a tilling rotary working body 16 as a tilling body for tilling and cultivating a paddy field is rotatably provided. This tillage rotary working body 16 has a horizontal rotating shaft 17 suspended between the lower ends of a chain case 14 and a bracket 15, and a plurality of tilling claws 18 are spaced from each other in the axial direction on the rotating shaft 17. The tilling claws 18 project radially from the rotation shaft 17.
[0017]
At the lower rear end of each of the chain case 14 and the bracket 15, side cover bodies 21, 21 as a pair of left and right plate-shaped projections which are separated from and opposed to each other are provided to project rearward. The both side cover bodies 21 are located on the sides of the tilling rotary working body 16 and prevent the soil discharged from the tilling rotary working body 16 together with the chain case 14 and the bracket 15 from scattering to the side. Further, as shown in FIG. 1, a substantially cylindrical support member 23 having both open end faces is attached to the outer side surface of the side cover body 21. It has a predetermined inclined state which is opened upward and the lower end opening is opened obliquely rearward and downward. Further, a rotation operation setting body 24 as a setting body is rotatably supported by the support member 23. The rotating operation setting body 24 is formed by bending an elongated rod-shaped member at three places and forming a substantially isosceles triangle in a side view, and a free end portion (not shown) is inserted into the support member 23 and is equal. Engaging portions 25 are formed on the two connecting portion sides. Note that the shaft member holding means 26 is constituted by the support member 23 and the rotation operation setting body 24.
[0018]
On the other hand, between a substantially central portion in the vertical direction of the chain case 14 and the bracket 15, a slightly curved cover body having an elongated substantially rectangular plate shape having a longitudinal direction in the left-right direction and a central portion in the width direction bulging upward is used. The upper cover body 31 is provided substantially in a horizontal plane. The upper cover body 31 is disposed along the tillage rotary work body 16 at a position above the tillage rotary work body 16 to prevent the soil discharged from the tillage rotary work body 16 from scattering upward.
[0019]
Further, a front end of an elastic connecting body 32 as an elastically deformable connecting body such as an elongated substantially rectangular plate-like rubber plate having a longitudinal direction in the left-right direction is fixedly connected to a rear end of the upper cover body 31. ing. As shown in FIG. 1, the elastic connecting body 32 is disposed so as to be inclined gradually downward from the front end side to the rear end side, and is substantially located between the pair of left and right side cover bodies 21. ing.
[0020]
Further, to the rear end of the elastic connecting body 32, a front end of an elongated substantially rectangular plate-shaped grounding substrate 34 having a longitudinal direction in the left-right direction bent at two intermediate points in the width direction is fixedly connected. As shown in FIG. 1, the leveling board 34 is disposed in an inclined shape that gradually slopes downward from the front end side to the rear end side, and is located behind the pair of left and right side cover bodies 21. .
[0021]
Further, a pair of left and right leveling side plates 35 and 35 facing and separated from each other are fixed to both ends in the longitudinal direction of the leveling board 34, and the front side of the leveling side plate 35 is between the side cover body 21 and the elastic coupling body 32. I'm getting into. Further, on the upper outer side surface of the leveling side plate 35, engaging shaft portions 36, 36 such as fixing pins having a circular cross section whose axial directions coincide with the horizontal direction are integrally formed. The protrusion dimensions of the pair of left and right engagement shafts 36 from the leveling side plate 35 are, respectively, as shown in FIG. 3, such that the tip of the engagement shaft 36 protrudes laterally from the outer surface of the side cover body 21. Is set to In addition, the engagement shaft portion 36 is disposed at a position slightly closer to the rear end side than the center portion in the front-rear direction of the elastic connecting plate 32 or at a lateral position at the center portion in the front-rear direction. In addition, a first leveling body 38 as a leveling body such as a leveling plate is constituted by the leveling board 34, the leveling side plate 35, the engaging shaft portion 36, and the like. , And guides the soil discharged from the tilling rotary work body 16 downward to level the ground in a substantially horizontal plane.
[0022]
The engaging shaft portion 36 of the grading side plate 35 of the first grading body 38 is configured to be freely disengageable from the engaging portion 25 of the turning operation setting body 24. For example, when the operator manually rotates the support member 23 in one direction around a rotation center axis that coincides with the axial direction of the support member 23, the free end portion is urged toward the side cover body 21 by a spring action, and The engaging portion 25 is brought into pressure contact with the side cover body 21, and the engaging portion 25 is engaged with the engaging shaft portion 36 of the ground leveling side plate 35 so as to be freely detachable. A restricting posture that regulates a change in the position of the rotation center axis X (center axis of the engagement shaft portion 36) in the left and right horizontal direction of the terrain body 38, that is, a change in the position of the engagement shaft portion 36 along the rotation center axis X. (FIGS. 1 and 5).
[0023]
When the turning operation setting body 24 is set in the restricting posture, the engaging shaft 36 engages with the engaging portion 25 of the turning operation setting body 24 in the restricting posture. 25 and the rear end edge of the side cover body 21 are in a position change restricted state in which the upward and rearward movements are restricted, but the rotation at the fixed position is possible. ing. That is, when the rotation operation setting body 24 is set in the restricting posture, the first ground adjustment body 38 is in a state where it can rotate around the engagement shaft 36 so that the rear end side moves up and down. At the time of rotation of the first grading body 38, the elastic connector 32 is elastically deformed so as to bend along the longitudinal direction in accordance with the rotation of the first grading body 38.
[0024]
Further, when the rotation operation setting body 24 is rotated by, for example, the operator's hand in the other direction opposite to one direction about the rotation center axis line that coincides with the axial direction of the support member 23, the free end side Urged toward the side cover body 21 by the action of the spring and brought into pressure contact with the side cover body 21, disengagement from the engagement shaft portion 36 of the ground leveling side plate 35, whereby the first A change in the position of the rotation center axis (the center axis of the engagement shaft portion) X in the left and right horizontal direction of the terrain body 38, that is, an allowable posture that allows the position change of the engagement shaft portion 36 along the rotation center axis X (FIG. 4). Note that, in this state, the first terrain body 38 is in a state of being suspended and held by the elastic connecting body 32.
[0025]
Further, at the rear end of the first terrain body 38, a second terrain body 40 such as an elongated substantially rectangular plate-shaped rake plate having a longitudinal direction in the left-right direction is provided with a pair of left and right rotating arms 41, 41 and the like. Are rotatably connected via a connecting means 42 composed of The rotation arm 41 is removably restricted by a rotation restricting means 43 attached to the leveling side plate 35. Then, the second terrain body 40 is located in a horizontal terrain posture at a position rearward of the first terrain body 38, and the surface of the paddy field that has been leveled by the first terrain body 38 is flattened in a horizontal plane. Level the ground.
[0026]
The front ends of a pair of left and right first support arms 46, 46 are rotatably mounted on the left and right arm mounting portions 45 on the upper surface of the upper cover body 31, and the rear end of the first support arm 46. The upper end of the first suspension rod 47 is rotatably connected to the portion, and the lower end of the first suspension rod 47 is rotatably connected to the upper surface of the first grounding body 38. The first support arm 46, the first suspension rod 47, the coil spring 48 and the like constitute a first grounding body ground pressure adjusting means 49. The first grounding body ground pressure adjusting means 49. , The contact pressure between the first terrain body 38 and the field scene can be adjusted.
[0027]
A front end of a second support arm 51 is rotatably attached to an arm attachment portion 50 at the center in the longitudinal direction on the upper surface of the upper cover body 31, and a second end is provided at a rear end of the second support arm 51. The upper end of the suspended rod 52 is rotatably connected, and the lower end of the second suspended rod 52 is rotatably connected to the upper surface of the second terrain body 40. A second grounding body ground pressure adjusting means 54 is constituted by a second support arm 51, a second hanging rod 52, a gas spring (not shown), and the like. At 54, the contact pressure between the second terrain body 40 and the field scene can be adjusted. In addition, the second leveling body 40 can be switched between a horizontal leveling attitude for performing leveling work and a substantially vertical soil leveling attitude for performing soil leveling work by operating an operation handle (not shown).
[0028]
Next, the operation of the embodiment will be described.
[0029]
A three-point link mechanism (not shown) of the tractor is connected to a three-point link mechanism (hydraulic device for lifting and lowering the work equipment), and the input shaft 5 is connected to a PTO shaft of the tractor (not shown) via a power transmission shaft (not shown). By the connection, the tiller rotary work body 16 is operated by the driving force from the tractor.
[0030]
At the time of roughing work centered on crushed soil, as shown in FIG. 5, the rotation operation setting body 24 is set in the restricting posture, and the position change of the engagement shaft portion 36 of the first terrain body 38 is restricted. I do.
[0031]
Then, when the entire agricultural work machine 1 is moved forward along the paddy field together with the tractor by traveling of the tractor, the tilling rotary work body 16 performs the tilling and crushing soil work, and the first terrain body 38 and the second terrain body A leveling operation is performed on the body 40, and the surface of the paddy field is leveled flat in a horizontal plane.
[0032]
At the time of this roughing work, when the first grading body 38 receives an earth pressure of a predetermined size or more based on a collision of the earth mass with the grading board 34, the first grading body 38 is moved in the left-right horizontal direction. The rear end pivots about the pivot center axis X in the direction in which the rear end rises, and in response to this rotation, the elastic coupling body 32 faces the engaging shaft portion 36, for example, at a position near the rear end. The body 32 bends slightly along the longitudinal direction.
[0033]
However, a predetermined portion of the elastic connector 32, that is, a portion located forward of the engagement shaft portion 36 is not deformed, and the space A between the predetermined portion of the elastic connector 32 and the tillable rotary working body 16 does not increase. Therefore, the space A is maintained at a predetermined size. As a result, it is possible to prevent the revolving property of the earth mass of the tilling rotary working body 16 from being deteriorated, and the crushing property is good.
[0034]
In addition, during the finishing allowance work centering on leveling, as shown in FIG. 4, the rotation operation setting body 24 is set in the allowable posture, and the position change of the engagement shaft portion 36 of the first ground adjustment body 38 is allowed. State.
[0035]
Then, when the entire agricultural work machine 1 is moved forward along the paddy field together with the tractor by traveling of the tractor, the tilling rotary work body 16 performs the tilling and crushing soil work, and the first terrain body 38 and the second terrain body A leveling operation is performed on the body 40, and the surface of the paddy field is leveled flat in a horizontal plane.
[0036]
At the time of this finishing allowance work, the first grading body 38 is in a free state suspended and held by the elastic connecting body 32 and, based on the elastic deformation of the elastic connecting body 32, is horizontally moved so that the rear end side moves up and down. The rotation is made around a rotation center axis in the horizontal direction, or around a rotation center axis in the front-rear horizontal direction so that both left and right sides are moved up and down. As a result, the unevenness of the field can be absorbed by the elastic deformation of the elastic coupling body 32, and even if the tractor is tilted due to the unevenness of the field, the first terrain body 38 and the second terrain body 40 can be maintained in a predetermined horizontal state, Good levelness.
[0037]
Further, in the free state in which the position change regulation of the engagement shaft portion 36 has been released, the weight of the first terrain body 38 does not forcibly act on the softened surface portion of the field, and a good finished surface can be obtained. . Further, in this free state, the center axis of rotation of the first leveling body 38 in the horizontal direction is located at the upper end, which is the front end of the elastic connector 32. The soil from the tilling rotary working body 16 can be guided flexibly downward at a relatively long distance in the leveling portion having a relatively long distance in the front-rear direction composed of the elastic connecting bodies 32, and the leveling can be improved.
[0038]
As described above, according to the embodiment, the pair of left and right rotation operation setting bodies 24 provided on the pair of left and right side cover bodies 21 on the side of the tilling rotary work body 16 of the machine body 1 can be used during roughing work. By rotating in one direction, the regulating posture is set to restrict the change in the position of the rotation center axis X in the left and right horizontal direction of the first terrain body 38, or to rotate in the other direction during finishing allowance work. Accordingly, the position of the rotation center axis X in the horizontal direction of the left and right horizontal direction of the first terrain body 38 can be allowed to be set by setting the allowable posture, so that it is possible to appropriately cope with the state of the field according to the work situation and the like. Suitable leveling work according to the condition of Further, the setting of the rotation operation setting body 24 can be performed by one-touch operation of the operator's hand, and the operability is good.
[0039]
In the above-described embodiment, the shaft holding means 26 for releasably holding the engagement shaft 36 of the first terrain body 38 has been described as a configuration having the support member 23 and the rotation operation setting body 24. However, for example, the shaft holding means 26a shown in FIGS. 6 to 8 may be used.
[0040]
This shaft portion holding means 26a has a rotation operation setting body 61 as a rotatable setting body, and this rotation operation setting body 61 is formed in an elongated substantially rectangular plate shape, and is provided near the center in the longitudinal direction. The bend is slightly bent, and the inclined portion formed by this bend serves as the knob 62. A shaft insertion hole 63 is formed at an end of the rotation operation setting body 61 on the base end side opposite to the knob 62, and a side cover body is formed in the shaft insertion hole 63. A support shaft 65 protruding laterally from the outer surface of 21 and having an axial direction coinciding with the horizontal direction of the agricultural work machine 1 is inserted therethrough, and the rotation operation setting body 61 can rotate around the support shaft 65. It has become. A ring-shaped retaining member 66 is fitted to the distal end of the support shaft 65, and a bias is applied between the retaining member 66 and the peripheral portion of the shaft insertion hole 63 of the rotation operation setting body 61. A coil spring 67 as a means is mounted in a compressed state. The coil spring 67 urges the turning operation setting body 61 toward the side cover body 21, and the turning operation setting body 61 is It is in pressure contact with the outer surface of 21.
[0041]
Further, a shaft holding hole 68 is formed in the center of the rotation operation setting body 61 in the longitudinal direction. On the other hand, on the outer surface of the side cover body 21, a shaft portion 70 for setting an allowable posture is provided so as to protrude toward the side, and the shaft portion 70 is located above the support shaft portion 65. It is located parallel to 65.
[0042]
The turning operation setting body 61 is engaged with the engaging shaft portion 36 of the first terrain body 38 by a turning operation in one direction according to the state of the field according to the work situation or the like. In combination, the first terrain body 38 is set to the restricting posture for restricting the change of the position of the rotation center axis X in the left-right horizontal direction (FIGS. 6 and 8), and is rotated in the other direction opposite to one direction. By operation, the engagement with the engagement shaft portion 36 is released, and the first terrain body 38 is set to an allowable posture in which the position of the rotation center axis X in the left-right horizontal direction is allowed to be changed (FIG. 7).
[0043]
That is, when the rotation operation setting body 61 is set in the restricting posture, for example, the operator grips the knob 62 of the rotation operation setting body 61 in the allowable posture by hand, and resists the urging force of the coil spring 67. Then, it is separated from the side cover body 21, and the engagement between the shaft holding hole 68 of the rotation operation setting body 61 and the shaft 70 is released. Thereafter, by rotating in one direction about the support shaft portion 65, the engaging shaft portion 36 of the leveling side plate 35 is inserted into the shaft holding hole 68 of the rotation operation setting body 61, and this rotation is performed. The operation setting body 61 and the engagement shaft 36 are engaged. As a result, the rotation operation setting body 61 changes the position of the rotation center axis X (the center axis of the engagement shaft portion 36) in the horizontal direction of the first terrain body 38, that is, the position of the engagement shaft portion 36. It is in a state where it is set to the restrictive posture for restricting the change.
[0044]
When the rotation operation setting body 61 is set in the restricted posture, the engagement shaft 36 is inserted and engaged with the shaft holding hole 68 of the rotation operation setting body 61 in the restricted posture. It is held by the shaft holding hole 68 and is in a position change restricted state in which the upward or rearward movement is restricted, but it is possible to rotate at the fixed position. That is, when the rotation operation setting body 61 is set in the restricting posture, the first terrain body 38 is in a state where the rear end side can be rotated up and down around the engagement shaft portion 36.
[0045]
When the rotation operation setting body 61 is set in the allowable posture, for example, the operator grips the knob 62 of the rotation operation setting body 61 in the restricting posture by hand, and resists the urging force of the coil spring 67. Then, the engagement between the shaft holding hole 68 of the rotation operation setting body 61 and the engagement shaft 36 is released. Thereafter, by rotating the support shaft 65 in the other direction in the other direction, the shaft 70 of the side cover body 21 is inserted into the shaft holding hole 68 of the rotation operation setting body 61. The setting body 61 and the shaft 70 are engaged. As a result, the rotation operation setting body 61 changes the position of the rotation center axis X (the center axis of the engagement shaft portion 36) in the horizontal direction of the first terrain body 38, that is, the position of the engagement shaft portion 36. The state is set to the allowable posture allowing the change. In this state, the first ground adjustment body 38 is in a state of being suspended and held by the elastic connecting body 32.
[0046]
Also, in the configuration including the shaft holding means 26a shown in FIGS. 6 to 8, similarly to the configuration including the shaft holding means 26 shown in FIG. Thus, it is possible to obtain an operation and effect such as performing an appropriate leveling operation according to the state of the field.
[0047]
Further, in each of the above embodiments, the first grounding body 38 has been described as a configuration connected to the rear end of the elastic connecting body 32 such as a rubber plate. However, for example, as shown in FIG. The left and right ends are rotated so as to move up and down around the support shaft 71 whose direction coincides with the front-rear horizontal direction, and the rear end is moved up and down around the support shaft 72 whose axial direction coincides with the horizontal direction. It may be configured to be connected to the rear end of the moving metal connector 32a. Note that the rotation operation setting body 24 shown in FIG. 9 is set in the restricted posture, and the rotation center axis X in the horizontal direction of the first ground adjustment body 38 in the left and right horizontal direction, that is, the ground adjustment board 34 of the first ground adjustment body 38 The position change of the engagement shaft portions 36, 36 protruding laterally from both left and right ends of the front end portion, which is the upper end portion, is restricted, and the position change of the engagement shaft portions 36, 36 is permitted by being set to the allowable posture.
[0048]
Further, as shown in FIG. 10, the first terrain body 38 rotates around the support shaft portion 73 whose axial direction coincides with the horizontal direction horizontally so that the rear end side moves up and down, and the support shaft portion 73 is A configuration in which the cover body 21 is connected to the rear end of the metal connection body 32b that moves up and down by being guided by the long hole 74 may be used. Note that the turning operation setting body 24 shown in FIG. 10 is set in the restricted posture and the turning center axis X in the left and right horizontal direction of the first terrain body 38, like the turning operation setting body 24 shown in FIG. That is, while the position change of the engaging shaft portions 36, 36 protruding laterally from the left and right ends of the front end portion, which is the upper end portion of the leveling substrate 34 of the first leveling body 38, is restricted, the engaging position is set to the allowable posture. The position of the joint shafts 36, 36 can be changed.
[0049]
In each of the above embodiments, the setting members such as the rotation operation setting members 24 and 61 have been described as being configured to be set in the restricted posture and the allowable posture by the rotation operation. Alternatively, a configuration may be adopted in which the insertion portion formed in the setting body is inserted into and removed from the hole of the first leveling body 38, and the operation is performed.
[0050]
Further, a setting driving source (not shown) may be provided, and the posture of the setting body may be automatically set by the driving force from the setting driving source.
[0051]
【The invention's effect】
According to the first aspect of the present invention, the setting body is set in the regulating posture to restrict a change in the position of the rotation center axis in the left-right horizontal direction of the terrain body, or the setting body is set in the allowable posture to adjust the terrain body. Since the position change of the rotation center axis in the left-right horizontal direction can be allowed, it is possible to appropriately cope with the condition of the field.
[0052]
According to the second aspect of the present invention, the rotation operation setting body is set to the restricting posture by the rotation operation to restrict a change in the position of the rotation center axis in the left-right horizontal direction of the terrain body, or the rotation operation setting body. Can be set to an allowable posture by a rotation operation, and the position of the rotation center axis in the left-right horizontal direction of the terrain body can be changed, so that it is possible to more appropriately cope with the condition of the field with a simple operation.
[0053]
According to the invention 請 Motomeko 3, wherein when the regulation posture setting rotation operation setting body, the space between the connecting member and the tilling member prevents the increases remarkably, can be satisfactorily Harrow due tilling member .
[Brief description of the drawings]
FIG. 1 is a side view of an embodiment of an agricultural working machine according to the present invention.
FIG. 2 is a rear view of the agricultural working machine.
FIG. 3 is a partially enlarged rear view of the agricultural working machine.
FIG. 4 is a side view showing a state where the setting body of the agricultural work machine is set in an allowable posture.
FIG. 5 is a side view showing a state where the setting body of the agricultural work machine is set in a restricted posture.
FIG. 6 is a partially enlarged rear view of another embodiment of the agricultural working machine of the present invention.
FIG. 7 is a side view showing a state where the setting body of the agricultural work machine is set in an allowable posture.
FIG. 8 is a side view showing a state where the setting body of the agricultural work machine is set in a restricted posture.
FIG. 9 is a rear perspective view of still another embodiment of the agricultural working machine of the present invention.
FIG. 10 is a perspective view of a farm working machine according to still another embodiment of the present invention as viewed from the rear.
[Explanation of symbols]
1 farm work machine
16 Rotary tilling body as tilling body
24, 61 Rotating operation setting body as setting body
31 Upper cover body as cover body
32 Elastic connector as connector
36 Engagement shaft
38 First terrain body X as terrain body Center axis of rotation

Claims

A tilling body for tilling the field,
A leveling body that is located at the rear position of the tillage and leveles the field flatly;
A setting body that is set to a restricting posture that restricts a change in the position of the rotation center axis in the left-right horizontal direction of the terrain body and an allowable posture that allows a position change of the rotation center axis .
The terrain body has an engagement shaft portion along a rotation center axis in the left-right horizontal direction,
The setting body is set to a restricting posture that removably engages with the engagement shaft portion and regulates a position change of the engagement shaft portion, and is disengaged from the engagement shaft portion. It is set to an allowable posture that allows the position change of the engagement shaft portion,
When the setting body is set in the restricting posture, the engaging shaft portion is in a position change restricting state in which movement is restricted, but can be rotated at a fixed position, and the terrain body is An agricultural working machine, which rotates so that a rear end side moves up and down around an engagement shaft portion .

The setting body is set to a restricting posture that restricts a change in the position of the rotation center axis in the left and right horizontal direction of the terrain body by a rotation operation, and is set to an allowable posture that allows a position change of the rotation center axis by the rotation operation. The agricultural working machine according to claim 1, wherein the agricultural operation machine is a rotatable operation setting body.

A cover member for preventing the scattering of soil located above the position of the plowing耘体,
A front end portion is connected to a rear end portion of the cover body, and a connected body having a rear end portion connected to a front end portion of the ground preparation body located at a rear position of the tilling body,
The agricultural work machine according to claim 2 , wherein the engagement shaft portion of the terrain body is disposed substantially at a side position of the connection body.