JP4201534B2

JP4201534B2 - Folding farm work machine

Info

Publication number: JP4201534B2
Application number: JP2002190603A
Authority: JP
Inventors: 孝志岡本; 明彦垣見; 徹阿部
Original assignee: KOBASHI INDUSTRIES CO., LTD.
Current assignee: KOBASHI INDUSTRIES CO., LTD.
Priority date: 2002-06-28
Filing date: 2002-06-28
Publication date: 2008-12-24
Anticipated expiration: 2022-06-28
Also published as: JP2004033020A

Description

【０００１】
【発明の属する技術分野】
本発明は、トラクタの後部に昇降可能に連結される作業機本体に対して延長作業機体を設けて、この延長作業機体を作業機本体に対して折り畳み可能に配備した折り畳み農作業機に関する。
【０００２】
【従来の技術】
この種の折り畳み農作業機としては、耕耘・整地或いは代掻き作業を行うロータリ作業機が知られている。このロータリ作業機は、トラクタの後部に昇降可能の連結装置を介して作業幅中央部分の作業機本体が連結されており、この作業機本体の左右両側に作業幅を延長する延長作業機体が折り畳み可能に配備されている。ここで、作業機本体のロータリ作業部はトラクタからの動力によって回転駆動され、延長作業機体の延長ロータリ作業部は、ロータリ作業部におけるロータリ軸端部を延長ロータリ作業部のロータリ軸端部に接続することによって回転駆動される。したがって、この折り畳みロータリ作業機は、中央部分の作業機本体に対して左右両側の延長作業機体を折り畳んだ状態で、作業機本体を単独で使用して狭幅の作業を行うことが可能であり、また、左右の延長作業機体の一方又は両方を水平に展開した状態にして、作業幅を延長させた状態で作業することも可能である。
【０００３】
このようなロータリ作業機においては、作業機本体と延長作業機体のそれぞれに、ロータリ作業部で砕土された泥土を整地する整地部材が機体の後方下部に上下動可能に軸支されている。この整地部材は、作業機本体に対して延長作業機体を折り畳んだ状態では、それぞれの整地部材を分離する必要があり、また、作業機本体に対して延長作業機体を水平に展開した状態では、それぞれの整地部材が一体となって上下動するように各整地部材間を連結させる必要がある。
【０００４】
このような折り畳み農作業機における整地部材の連結手段としては、特開２０００−３４２００１号公報に記載されるように、作業機本体側又は延長作業機体側の各整地部材における対向する側部の一方に嵌合凸部を設け、対向する他方の側部に嵌合凹部を設けて、作業機本体に対して延長作業機体が水平に展開した状態になると、一方の整地部材における嵌合凸部が他方の整地部材における嵌合凹部に嵌合され、両整地部材を連結するものが知られている。
【０００５】
【発明が解決しようとする課題】
このような折り畳み農作業機における整地部材の連結手段によると、作業機本体又は延長作業機体の側部の一方に嵌合凹部が設けられるので、折り畳み状態で作業をしている際に露出した嵌合凹部に土等が入り込み凹部を塞いでしまい、整地部材の連結を円滑に行うことができなくなるという問題があった。
【０００６】
また、凹凸嵌合によって作業機本体側の整地部材と延長作業機体側の整地部材を連結させる場合には、機械的な組み付け精度をかなり高くしない限り、両整地部材の側部間に隙間が生じやすく、この隙間からロータリ作業部で砕土された泥土が流出して、必要な整地機能を達成することができないという問題があった。更には、高い組み付け精度を要求した場合には、構造も複雑化してコスト高になると共に高い生産性が得られないという問題があった。
【０００７】
本発明は、このような問題に対処することを課題とするものであって、具体的には、折り畳み農作業機における整地部材の連結に際して、確実な連結が可能であり、更には、簡単な構造で、連結された整地部材間から泥土が流出するのを防止することを目的とするものである。
【０００８】
【課題を解決するための手段】
このような目的を達成するために、本発明による各請求項に係る発明は、以下の特徴を具備するものである。
【０００９】
請求項１に係る発明は、トラクタの後部に昇降可能に連結され、該トラクタからの動力により駆動されるロータリ作業部を備えた作業機本体と、該作業機本体に対して作業幅を延長するように配備される延長作業機体とからなり、前記作業機本体に対して前記延長作業機体を水平に展開した状態と、前記作業機本体に対して前記延長作業機体を折り畳んだ状態とを選択可能にした折り畳み農作業機において、前記作業機本体及び前記延長作業機体は機体の後方下部に上下動可能に軸支された整地部材を備え、該各整地部材には、前記展開した状態で両整地部材を連結させる連結手段が設けられ、該連結手段は、前記作業機本体側の整地部材の上昇に伴って両整地部材を協動させる第１協動体と前記作業機本体側の整地部材の下降に伴って両整地部材を協動させる第２協動体とからなることを特徴とする。
【００１０】
請求項２に係る発明は、前述の折り畳み農作業機を前提として、前記第１協動体及び前記第２協動体は、それぞれ両整地部材の対向側部から突出する一対の突出部材からなり、前記第１協動体では、作業機本体側の突出部材が延長作業機体側の突出部材の下に重ねられ、前記第２協動体では、作業機本体側の突出部材が延長作業機体側の突出部材の上に重ねられることを特徴とする。
【００１１】
請求項３に係る発明は、前述の折り畳み農作業機を前提として、前記第１又は第２協動体の少なくとも一方における前記一対の突出部材の一方は、対向する他方に向けて突没可能に弾持された部材であり、他方は、該部材に当接する当接面を有することを特徴とする。
【００１２】
請求項４に係る発明は、前述の折り畳み農作業機を前提として、前記一方の突出部材の先端が前記展開した状態で前記他方の突出部材側面の案内板に当接し、前記両整地部材が接地抵抗を受けて同一高さになったときに、前記案内板によって一旦退避した前記一方の突出部材が前記他方の突出部材の当接面上に突出することを特徴とする。
【００１３】
請求項５に係る発明は、前述の折り畳み農作業機を前提として、前記第１又は第２協動体は、整地部材の側部に沿って形成される板状突出部材からなることを特徴とする。
【００１４】
請求項６に係る発明は、前述の折り畳み農作業機を前提として、前記整地部材は、前記機体に軸支される第１整地部材と該第１整地部材の下方に軸支される第２整地部材とからなり、前記連結手段が前記第１整地部材及び第２整地部材のそれぞれに設けられることを特徴とする。
【００１５】
このような各請求項に係る発明によると以下の作用を為すものである。
【００１６】
すなわち、折り畳み農作業機は、トラクタの後部に昇降可能に連結され、このトラクタからの動力により駆動されるロータリ作業部を備えた作業機本体と、この作業機本体に対して作業幅を延長するように配備された延長作業機体とからなり、作業機本体に対して延長作業機体を水平に展開した状態と、作業機本体に対して延長作業機体を折り畳んだ状態とを選択可能にしているので、中央部分の作業機本体に対して左右両側の延長作業機体を折り畳んだ状態で、作業機本体を単独で使用して狭幅の作業を行うことが可能であり、また、左右の延長作業機体の一方又は両方を延長状態に設置して、作業幅を延長させた状態で作業することも可能になる。
【００１７】
また、作業機本体及び延長作業機体は機体の後方下部に上下動可能に軸支された整地部材を備え、各整地部材には、作業機本体と延長作業機体を展開した状態で両者の整地部材を連結させる連結手段が設けられているので、展開時には両整地部材を連結させて一体的に上下動させることができ、延長した作業幅内で均一な整地を行うことが可能になり、作業機本体に対して延長作業機体を折り畳む際には各整地部材を分離させることができる。
【００１８】
そして、作業機本体と延長作業機体との機体にそれぞれ軸支された整地部材を連結する連結手段は、作業機本体側の整地部材の上昇に伴って両整地部材を協動させる第１協動体と作業機本体側の整地部材の下降に伴って両整地部材を協動させる第２協動体とからなっているので、それぞれの整地部材に嵌合凹部を設ける必要が無く、作業中にこの凹部に土が詰まることがないので、両整地部材の連結を確実に行うことができる。
【００１９】
更に本発明の折り畳み農作業機によると、前述の連結手段における第１協動体及び第２協動体は、それぞれ両整地部材の対向側部から突出する一対の突出部材からなり、第１協動体では、作業機本体側の突出部材が延長作業機体側の突出部材の下に重ねられ、第２協動体では、作業機本体側の突出部材が延長作業機体側の突出部材の上に重ねられている。
【００２０】
したがって、作業機本体に対して延長作業機体が水平に展開した状態で作業機本体側の整地部材が上昇すると、この整地部材の側部から突出した突出部材が延長作業機体側の整地部材の側部から突出した突出部材を押し上げることになり、また、作業機本体側の整地部材が下降すると、作業機本体側の整地部材の側部から突出した突出部材が延長作業機体側の整地部材の側部から突出した突出部材を押し下げることなる。これによって、展開時には作業機本体に軸支された整地部材と延長作業機体に軸支された整地部材とを一体的に上下動させることができる。
【００２１】
また、作業機本体側の整地部材から突出する突出部材と延長作業機体側の整地部材から突出する突出部材とは何ら結合されていないので、作業機本体に対して延長作業機体を折り畳む際には、特に解除動作を行うことなく、両整地部材を分離することができる。これによって、装置の簡略化が可能になる。
【００２２】
更に本発明の折り畳み農作業機によると、前述した一対の突出部材の一方は、対向する他方に向けて突没可能に弾持された部材であり、他方は、この部材に当接する当接面を有している。これによると、作業機本体に対して水平に延長作業機体を展開した場合であっても、メンテナンス等で必要な場合には、弾持された突出部材を弾性に抗して退避させることができ、作業機本体側の整地部材と延長作業機側の整地部材とを独立させることができる。
【００２３】
また、一方の突出部材の先端が作業機本体と延長作業機体とが展開した状態で他方の突出部材側面の案内板に当接し、両整地部材が接地抵抗を受けて同一高さになったときに、案内板によって一旦退避した一方の突出部材が他方の突出部材の当接面上に突出するようにすることで、整地部材を特に操作することなく、両整地部材の連結を行うことができる。
【００２４】
更に本発明の折り畳み農作業機によると、前述の第１又は第２協動体を整地部材の側部に沿って形成される板状突出部材とすることができる。これによると、展開時には、整地部材の側部に沿って形成された板状突出部材が作業機本体側の整地部材と延長作業機体側の整地部材の間で重なり合った状態になるので、両整地部材間の側部の隙間を板状突出部材で塞ぐことが可能になり、簡単構造で、両整地部材間の間隙から泥土が流出するのを防止することができる。
【００２５】
このような整地部材間の連結手段は、整地部材として機体に軸支される第１整地部材（エプロン）と該第１整地部材の下方に軸支される第２整地部材（均平板）とからなるものにおいて、それぞれの整地部材相互に設けることができる。
【００２６】
【発明の実施の形態】
以下、本発明の実施形態を図面を参照して説明する。
【００２７】
図１及び図２は、折り畳み農作業機であるロータリ作業機の外観図である。ロータリ作業機１は、左右方向の作業幅が長く、一行程で幅広の砕土或いは代掻き作業を行うことができるロータリ式のハローである。このロータリ作業機１の前部中央部分には、図示省略したトラクタのトップリンクとロアリンクとからなる３点リンクヒッチ機構に連結される連結部２が設けられ、ロータリ作業機１はトラクタの後部に連結部２によって昇降可能に連結されるものである。また、トラクタのＰＴＯ軸から、ユニバーサルジョイント等の伝動手段を介してギアボックス３に動力が伝達される。
【００２８】
このロータリ作業機１は、トラクタのタイヤの間隔よりやや作業幅の広い中央部分の作業機本体４と、その作業機本体４の左右に作業幅を延長させるために配備される延長作業機体５Ｌ，５Ｒとからなり、この作業機本体４と延長作業機体５Ｌ，５Ｒとによって３分割された構造をなしている。そして、延長作業機体５Ｌ，５Ｒは、作業機本体４の固定カバー部材１５に設けられた回転支持部６，６により、ほぼ１８０°回転可能に連結されており、図２に示されるように、作業機本体４の背面と左右に配備された延長作業機体５Ｌ，５Ｒの背面とを重ね合わせるようにして折り畳み状態を保持できるようにしている。また、作業幅を延長する際には、作業機本体４に対して、延長作業機体５Ｌ，５Ｒの一方又は両方を水平に展開した状態で保持できるようにしており、前述の折り畳み状態と展開状態とが選択可能になっている。
【００２９】
ここで、作業機本体４は前述のようにトラクタのタイヤ間隔より広い作業幅を有して、トラクタのタイヤにより圃場に付けられた車輪跡を消去できるようにしている。また、延長作業機体５Ｌ，５Ｒは、左右両方を折り畳み状態にできるように、それぞれの長さを作業機本体４の長さに対して２分の１以下にしている。
【００３０】
そして、作業機本体４及び延長作業機体５Ｌ，５Ｒのそれぞれにおける上部には、前述した固定カバー部材１５，１５ａがそれぞれ設けられており、その後下端部のそれぞれに整地板（第１整地部材）１６，１６ａの上端部が枢支軸１６ｂを介して回動自在に枢着されている。また、整地板１６，１６ａの後端部に均平板（第２整地部材）１７，１７ａの基端部が枢支軸１７ｂにより枢支されている。ここで、作業機本体４における均平板１７は、均平板制御体１８を介して幅方向中央部が支持されており、この均平板１７が枢支軸１７ｂにより自在に回動できる均平作業状態と、均平板１７の回動を下方側で規制して代掻き土壌の土寄せ等を行う固定状態とを選択できるようにしており、この選択はトラクタ操縦者が運転状態のままで操作できるようにしている。
【００３１】
また、作業機本体４における整地板１６と延長作業機体５Ｌ，５Ｒにおける整地板１６ａ，１６ａの両側部には、整地板連結手段１９が設けられており、作業機本体４における均平板１７と延長作業機体５Ｌ，５Ｒにおける均平板１７ａ，１７ａの両側部には、均平板連結手段２０が設けられている。図２における符号１９３及び２０１はそれぞれ整地板連結手段１９，均平板連結手段２０における突出部材を示している。
【００３２】
上記ギアボックス３の左右両側には作業機本体４を支持する本体フレーム７が延設されている。この作業機本体４における本体フレーム７の片端側には伝動ケース８が、他端側には支持枠９がそれぞれ垂設されており、この伝動ケース８と支持枠９との間にロータリ作業部１０が軸装されている。また、延長作業機体５Ｌ，５Ｒにおいては、軸支部１４，１４間に延長ロータリ作業部１３（１３Ａが延長ロータリ軸、１３Ｂがロータリ爪を示している）が軸装されている。１１は伝動ケース８の側面に露出する接続部であり（突出片１１Ａ，筒状体２１）、１２は軸支部１４の外側に露出する被接続部である。
【００３３】
図３は、前述したロータリ作業機の駆動部を説明する説明図である。前述と同一の部位には同一の符号を付している。ギアボックス３にはトラクタのＰＴＯ軸からの動力がユニバーサルジョイント等の伝動手段を介して入力される入力軸３Ａが突出しており、この入力軸３Ａに入力された動力は、歯車伝動機構３Ｂ，３Ｃ、伝動軸７Ａ、伝動ケース８内のスプロケット８Ａ及びチェン８Ｂを介してロータリ軸１０Ａに伝達されている。
【００３４】
ロータリ軸１０Ａは、周面には複数のロータリ爪１０Ｂが突設されており、その両端が作業機本体４の軸支部４Ａ，４Ａに軸支されてロータリ作業部１０を形成している。また、延長ロータリ軸１３Ａは、周面に複数のロータリ爪１０Ｂが突設されており、その両端が延長作業機体５Ｌ，５Ｒの軸支部１４に軸支されて延長ロータリ作業部１３を形成している。
【００３５】
そして、ロータリ軸１０Ａの両端部には、作業機本体４の側面から外側に露出して接続部１１が設けられている。また、この接続部１１（突出片１１Ａ，筒状体２１）と接続する被接続部１２が、延長作業機体５Ｌ，５Ｒの側面から露出して、延長ロータリ軸１３Ａの片側端部に設けられている。したがって、作業機本体４に対して水平に延長作業機体５Ｌ，５Ｒを展開すると、ロータリ軸１０Ａ端部の接続部１１と延長ロータリ軸１３Ａ端部の被接続部１２とが接続した状態になり、ロータリ軸１０Ａを介して延長ロータリ軸１３Ａに動力が伝達されることになる。また、ロータリ軸１０Ａと延長ロータリ軸１３Ａとを離脱して作業機本体４に対して延長作業機体５Ｌ，５Ｒを折り畳んだ状態では、ロータリ軸１０Ａが単独で駆動されることになる。
【００３６】
以下、図４〜図６において、整地板連結手段１９及び均平板連結手段２０について詳細に説明する。図４は整地板１６，１６ａ、均平板１７，１７ａの連結部分を示す平面図である。図５は図４におけるＡ−Ａ部分断面図、図６はＢ−Ｂ側面図を示している。また、前述の図における説明と同一の部分には同一の符号を付して説明を一部省略する。
【００３７】
整地板連結手段１９は、第１協動体と第２協動体とからなるが、作業機本体側の整地部材１６の側部上方から突出する突出部材１９１、延長作業機体側の整地板１６ａの側部上方から突出する突出ピン１９２によって第１協動体が形成され、作業機本体側の整地板１６の側部下方から突出する突出部材となる板状突出部材１９３、延長作業機体側の整地板１６ａの側部下方から突出する突出部材となる板状突出部材１９４によって第２協動体が形成されている。
【００３８】
また、均平板連結手段２０も同様に第１協動体と第２協動体とからなり、作業機本体側の均平板１７の側部から突出する突出部材２０１の上部に形成される当接部材２０１Ａ、延長作業機体側の均平板１７ａの側部上方から突出する突出ピン２０２によって第１協動体が形成され、作業機本体側の均平板１７から突出する突出部材２０１の下部に形成される当接部材２０１Ｂ、延長作業機体側の均平板１７ａの側部下方から突出する突出部材となる板状突出部材２０３によって第２協動体が形成されている（図６参照）。
【００３９】
突出ピン１９２は、延長作業機体側の整地板１６ａにおける側部及び支持部１９２Ａに支持され、本体作業機体側に向けてバネ１９２Ｂによって付勢されて突没可能になっている。また、この突出ピン１９２には、補助支持ピン１９２Ｃが二股に分かれて形成されており、整地板１６ａ側部の孔に支持されている。一方、均平板１７ａにおける突出ピン２０２は、支持枠２０２Ａに支持され、本体作業機側に向けてバネ２０２Ｂによって付勢されて突没可能になっている。
【００４０】
このような構造の整地板連結手段１９によると、作業機本体４に対して延長作業機体５Ｌ，５Ｒを水平に展開させた状態で図４及び図５の状態となり、延長作業機体側の整地板１６ａ側部から突出ピン１９２が突出して作業機本体側の整地板１６側部から突出している突出部材１９１上に重なり、整地板１６の側部に当接することで、第１協動体が機能する状態になる。また、作業機本体側の整地板１６の側部下方に突出する板状突出部材１９３が延長作業機体側の整地板１６ａの側部下方に突出する板状突出部材１９４の上に重なる状態になって、第２協動体が機能することになる。
【００４１】
すなわち、この状態になると、作業機本体側の整地板１６を上昇動作させると、突出部材１９１が突出ピン１９２に当接して押し上げることになって、延長作業機体側の整地板１６ａを共に上昇動作させることになり、また、作業機本体側の整地板１６を下降動作させると、作業機本体側の板状突出部材１９３が延長作業機体側の板状突出部材１９４に当接して押し下げることになって、延長作業機体側の整地板１６ａを共に下降動作させることになる。したがって、第１及び第２協動体が機能している状態では、整地板１６，１６ａは一体的に上下動することになる。
【００４２】
同様に、均平板連結手段２０によると、作業機本体４に対して延長作業機体５Ｌ，５Ｒを水平に展開させた状態で図４及び図６の状態となり、延長作業機体側の均平板１７ａ側部から突出ピン２０２が突出して作業機本体側の均平板１７側部から突出している突出部材２０１における当接部材２０１Ａ上に重なり、第１協動体が機能する状態になる。また、作業機本体側の均平板１７の側部に突出する突出部材２０１の下方にある当接部材２０１Ｂが延長作業機体側の均平板１７ａの側部下方に突出する板状突出部材２０３の上に重なる状態になって、第２協動体が機能することになる。
【００４３】
すなわち、この状態になると、作業機本体側の均平板１７を上昇動作させると、当接部材２０１Ａが突出ピン２０２に当接して押し上げることになって、延長作業機体側の均平板１７ａを共に上昇動作させることになり、また、作業機本体側の均平板１７を下降動作させると、作業機本体側の当接部材２０１Ｂが延長作業機体側の板状突出部材２０３に当接して押し下げることになって、延長作業機体側の整地部材１７ａを共に下降動作させることになる。したがって、第１及び第２協動体が機能している状態では、均平板１７，１７ａは一体的に上下動することになる。
【００４４】
このような実施形態のロータリ作業機１によると、図１に示すように、作業機本体４に対して左右の延長作業機体５Ｌ，５Ｒを水平に展開させて広い作業幅で作業する使用形態、図２に示すように、作業機本体４に対して左右の延長作業機体５Ｌ，５Ｒを折り畳んだ状態にし作業機本体４のみで作業する使用形態、作業機本体４に対して左右の延長作業機体５Ｌ，５Ｒの一方を折り畳んだ状態で左右の片側のみの作業幅を広げて作業する使用形態の各使用形態を選択することが可能である。また、路上での走行移動或いは倉庫への収納時には、作業機本体４を非作業位置にリフトアップして、この状態で作業機本体４に対して左右の延長作業機体５Ｌ，５Ｒを折り畳んだ状態にすることもできる。
【００４５】
そして、延長作業機体５Ｌ，５Ｒを折り畳んだ状態から作業機本体４と水平の展開状態にした場合には、突出ピン１９２は突出した状態になって展開と同時に図５の状態が保持され第１及び第２協動体が機能して整地板１６，１６ａは一体化された状態になる。
【００４６】
一方、均平板１７，１７ａの関係は、延長作業機体側の均平板１７ａが自重で垂れ下がって最下方状態にあるので、展開された状態で均平板１７，１７ａが接地抵抗を受けるまでは、全体的に作業機本体側の均平板１７に対して延長作業機体側の均平板１７ａが下に位置する状態となる。その状態から、均平板１７，１７ａを圃場の作業面に接地させると、延長作業機体側の均平板１７ａが上昇して、突出部材２０１側面の案内板２０１Ｃに当接した突出ピン２０２は案内板２０１Ｃの作用によって一旦退避させられ、均平板１７，１７ａが接地抵抗により同じ高さになったときに、突出部材２０１の当接部材２０１Ｂが板状突出部材２０３に当接し、当接部材２０１Ａ上に突出ピン２０２が突出する。これによって、特に均平板１７を操作することなく第１及び第２の協動体を機能させることができ、両均平板１７，１７ａを連結することができる。そして、このような展開状態おいても、突出ピン１９２，２０２は突没可能であるから、弾性に抗してこれらを延長作業機体側に退避することで、整地板１６，１６ａ及び均平板１７，１７ａは相互に独立させることができる。
【００４７】
更に、延長作業機体５Ｌ，５Ｒを作業機本体４の上部に折り畳んだときには、突出ピン１９２の先端が開放されるので、バネ１９２Ｂの作用によって突出ピン１９２をスライドさせて補助支持ピン１９２Ｃを図示省略した延長作業機体側の固定カバー部材１５ａの支持部に支持させて、整地板１６ａを固定することができる。
【００４８】
このような実施形態によると、整地板連結手段１９又は均平板連結手段２０は、作業機本体側の整地板１６又は均平板１７の上昇に伴って両整地板１６，１６ａ又は均平板１７，１７ａを協動させる第１協動体と作業機本体側の整地板１６又は均平板１７の下降に伴って両整地板１６，１６ａ又は均平板１７，１７ａを協動させる第２協動体とからなっているので、それぞれの整地板１６，１６ａ又は均平板１７，１７ａに嵌合凹部を設ける必要が無い。作業中に嵌合凹部に土が詰まることがないので、両整地板１６，１６ａ又は均平板１７，１７ａの連結を確実に行うことができる。
【００４９】
また、作業機本体側の整地板１６、均平板１７から突出する突出部材１９１，板状突出部材１９３，突出部材２０１と延長作業機体側の整地板１６ａ，均平板１７ａから突出する突出ピン１９２，板状突出部材１９４，突出ピン２０２，板状突出部材２０３とは何ら結合されていないので、作業機本体４に対して延長作業機体５Ｌ，５Ｒを折り畳む際には、特に解除動作を行うことなく、両整地板１６，１６ａ又は均平板１７，１７ａ間を分離することができる。これによって、装置の簡略化が可能になる。
【００５０】
更に、展開時には、整地板１６，１６ａの側部に沿って形成された板状突出部材１９３，１９４が作業機本体側の整地板１６と延長作業機体側の整地板１６ａの間で重なり合った状態になるので、両整地板１６，１６ａ間の側部の隙間を板状突出部材１９３，１９４で塞ぐことになり、両整地板１６，１６ａ間の間隙から泥土が流出するのを防止することができる。
【００５１】
【発明の効果】
本発明はこのように構成されるので、折り畳み農作業機における整地部材の連結に際して、確実な連結が可能であり、更には、簡単な構造で連結された整地部材間から泥土が流出するのを防止することができる。
【図面の簡単な説明】
【図１】本発明の折り畳み農作業機であるロータリ作業機の外観図（展開時）である。
【図２】本発明の折り畳み農作業機であるロータリ作業機の外観図（折り畳み時）である。
【図３】本発明の折り畳み農作業機であるロータリ作業機の駆動部を説明する説明図である。
【図４】本発明の実施形態に係る整地部材、均平板の連結部分を示す平面図である。
【図５】図４におけるＡ−Ａ部分断面図である。
【図６】図４におけるＢ−Ｂ側面図である。
【符号の説明】
１ロータリ作業機
２連結部
３ギヤボックス
４作業機本体
４Ａ軸支部
５Ｌ，５Ｒ延長作業機体
６回転支持部
７本体フレーム
８伝動ケース
９支持枠
１０ロータリ作業部
１３延長ロータリ作業部
１５，１５ａ固定カバー部材
１６，１６ａ整地板（第１整地部材）
１７，１７ａ均平板（第２整地部材）
１８均平板制御体
１９整地板連結手段
１９１突出部材（第１協動体）
１９２突出ピン（第１協動体）
１９３，１９４板状突出部材（第２協動体）
２０均平板連結手段
２０１突出部材
２０１Ａ当接部材（第１協動体），２０１Ｂ当接部材（第２協動体）
２０１Ｃ案内板
２０２突出ピン（第１協動体）
２０３板状突出部材（第２協動体） [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a folding farm work machine in which an extension work machine body is provided for a work machine body connected to a rear portion of a tractor so as to be movable up and down, and the extension work machine body is foldable with respect to the work machine body.
[0002]
[Prior art]
As this type of folding farm work machine, a rotary work machine that performs tillage, leveling, or scraping work is known. In this rotary work machine, the work machine body at the center of the work width is connected to the rear part of the tractor via a connecting device that can be raised and lowered, and the extension work machine body that extends the work width is folded on both the left and right sides of the work machine body. It is deployed as possible. Here, the rotary working part of the work machine body is rotated by the power from the tractor, and the extended rotary working part of the extension work machine body connects the rotary shaft end part of the rotary work part to the rotary shaft end part of the extension rotary work part. It is rotationally driven by doing. Therefore, this folding rotary work machine can perform a narrow work by using the work machine body alone with the extended work machine body on the left and right sides folded with respect to the work machine body at the center. It is also possible to work in a state in which one or both of the left and right extension work machines are horizontally deployed and the work width is extended.
[0003]
In such a rotary work machine, a leveling member for leveling the mud ground crushed by the rotary work part is pivotally supported on the work machine body and the extension work machine so as to be vertically movable at the rear lower part of the machine body. This leveling member needs to separate each leveling member in a state where the extension work machine body is folded with respect to the work machine body, and in a state where the extension work machine body is deployed horizontally with respect to the work machine body, It is necessary to connect each leveling member so that each leveling member moves up and down integrally.
[0004]
As a means for connecting a leveling member in such a folding farm work machine, as described in Japanese Patent Application Laid-Open No. 2000-34001, one of the opposing side portions of each leveling member on the work machine main body side or the extension work machine side is provided. When the fitting convex portion is provided, the fitting concave portion is provided on the opposite side portion, and the extension work machine body is deployed horizontally with respect to the work machine main body, the fitting convex part on one leveling member is the other. There is known one that is fitted in a fitting recess in the leveling member and connects both leveling members.
[0005]
[Problems to be solved by the invention]
According to the connecting means of the leveling member in such a folding farm work machine, the fitting recess is provided on one of the side of the work machine main body or the extension work machine body, so that the fitting exposed when working in the folded state There is a problem in that soil or the like enters the recess and closes the recess, making it impossible to smoothly connect the leveling members.
[0006]
In addition, when the leveling member on the work machine main body side and the leveling member on the extended work machine side are connected by uneven fitting, a gap is generated between the side portions of both leveling members unless the mechanical assembly accuracy is considerably increased. There was a problem that the mud ground crushed in the rotary working part flowed out from this gap and the necessary leveling function could not be achieved. Furthermore, high assembly when requesting the accuracy, there is a problem that the structure also can not be obtained both high productivity becomes costly and complicated.
[0007]
An object of the present invention is to cope with such a problem. Specifically, when a leveling member is connected in a folding farm work machine, a reliable connection is possible, and a simple structure is provided. Then, it aims at preventing mud from flowing out between the connected leveling members.
[0008]
[Means for Solving the Problems]
In order to achieve such an object, the claimed invention according to the present invention has the following features.
[0009]
The invention according to claim 1 is connected to the rear portion of the tractor so as to be movable up and down, and has a working machine body including a rotary working unit driven by power from the tractor, and extends the working width with respect to the working machine body. It is possible to select a state in which the extension work machine body is horizontally deployed with respect to the work machine body and a state in which the extension work machine body is folded with respect to the work machine body. In the folded agricultural work machine, the work machine main body and the extension work machine body include a leveling member that is pivotally supported at the lower rear part of the machine body so as to be movable up and down, and each leveling member includes both leveling members in the unfolded state. Connecting means is provided for connecting the first cooperating body for cooperating both the leveling members as the leveling member on the working machine body side rises and the leveling member on the working machine body side. Accompanying both Characterized by comprising the second cooperating elements which cooperate with member.
[0010]
According to a second aspect of the present invention, on the premise of the above-mentioned folding farm work machine, the first cooperative body and the second cooperative body are each composed of a pair of projecting members projecting from opposite sides of both leveling members, In one cooperative body, the projecting member on the work machine body side is overlaid under the projecting member on the extension work machine body side, and in the second cooperative body, the projecting member on the work machine body side is above the projecting member on the extension work machine body side. It is characterized by being superimposed on.
[0011]
According to a third aspect of the present invention, on the premise of the above- described folding farm working machine, one of the pair of projecting members in at least one of the first or second cooperative bodies is supported so as to be able to project and retract toward the opposite side. The other member has a contact surface that contacts the member.
[0012]
According to a fourth aspect of the present invention, on the premise of the above-described folding farm working machine, the tip of the one protruding member abuts on the guide plate on the side surface of the other protruding member in the expanded state, and the two leveling members are connected to ground resistance. The one projecting member once retracted by the guide plate is projected onto the contact surface of the other projecting member when the height becomes the same.
[0013]
The invention according to claim 5 is characterized in that the first or second cooperative body is composed of a plate-like projecting member formed along a side portion of the leveling member, on the premise of the above-described folding farm working machine.
[0014]
According to a sixth aspect of the present invention, on the premise of the above-described folding farm working machine, the leveling member includes a first leveling member pivotally supported by the machine body and a second leveling member pivotally supported below the first leveling member. The connecting means is provided on each of the first leveling member and the second leveling member.
[0015]
According to the invention according to each of such claims, the following operations are performed.
[0016]
That is, the folding farm work machine is connected to the rear part of the tractor so as to be movable up and down, and has a work machine body provided with a rotary work part that is driven by power from the tractor, and extends the work width with respect to the work machine body. It is possible to select a state in which the extension work machine body is horizontally deployed with respect to the work machine body and a state in which the extension work machine body is folded with respect to the work machine body. It is possible to perform narrow work by using the work machine body alone with the extension work machine body on the left and right sides folded with respect to the work machine body in the center part. It is also possible to work in a state where one or both are installed in an extended state and the work width is extended.
[0017]
In addition, the work machine body and the extension work machine body are provided with leveling members that are pivotally supported at the rear lower part of the machine body so as to be movable up and down, and each leveling member includes both the leveling members in a state where the work machine body and the extension work machine body are deployed. Since the connecting means for connecting the two leveling members is connected, the leveling members can be connected and moved up and down integrally during deployment, and uniform leveling can be performed within the extended work width. When the extension work machine body is folded with respect to the main body, each leveling member can be separated.
[0018]
The connecting means for connecting the leveling members pivotally supported by the machine body of the work machine main body and the extension work machine body is a first cooperating body for cooperating both leveling members as the leveling member on the work machine main body side rises. And a second cooperating body that cooperates with the two leveling members as the leveling member on the work machine main body side descends. Since the soil is not clogged, both the leveling members can be reliably connected.
[0019]
Furthermore, according to the folding farm work machine of the present invention, the first cooperative body and the second cooperative body in the above-mentioned connecting means are each composed of a pair of projecting members projecting from the opposing side portions of the two leveling members, The projecting member on the work machine body side is overlaid under the projecting member on the extension work machine body side, and in the second cooperative body, the projecting member on the work machine body side is overlaid on the projecting member on the extension work machine body side.
[0020]
Therefore, when the leveling member on the work implement main body side rises in a state where the extension work implement is horizontally deployed with respect to the work implement main body, the projecting member protruding from the side of the leveling member becomes the side of the leveling member on the extension work implement side When the leveling member on the work machine main body side is lowered, the protruding member protruding from the side of the leveling member on the work machine main body side becomes the side of the leveling member on the extension work machine side. The protruding member protruding from the portion is pushed down. As a result, the leveling member pivotally supported by the work machine main body and the leveling member pivotally supported by the extension work machine body can be integrally moved up and down during deployment.
[0021]
In addition, since the projecting member projecting from the leveling member on the work machine main body side and the projecting member projecting from the leveling member on the extension work machine side are not combined at all, when folding the extension work machine body on the work machine main body Both the leveling members can be separated without particularly performing the releasing operation. This makes it possible to simplify the apparatus.
[0022]
Furthermore, according to the folding agricultural work machine of the present invention, one of the pair of projecting members described above is a member that is supported so as to project and retract toward the other facing the other, and the other has a contact surface that contacts the member. Have. According to this, even if the extension work machine body is deployed horizontally with respect to the work machine body, the projecting member that has been held can be retracted against elasticity if necessary for maintenance or the like. The leveling member on the work machine body side and the leveling member on the extension work machine side can be made independent.
[0023]
Also, when the tip of one projecting member abuts the guide plate on the side surface of the other projecting member with the working machine main body and the extension working machine body unfolded, and the two leveling members receive ground resistance and become the same height In addition, since the one protruding member once retracted by the guide plate protrudes on the contact surface of the other protruding member, the two leveling members can be connected without particularly operating the leveling member. .
[0024]
Furthermore, according to the folding agricultural work machine of the present invention, the first or second cooperative body described above can be a plate-like protruding member formed along the side of the leveling member. According to this, at the time of deployment, since the plate-like projecting member formed along the side of the leveling member overlaps between the leveling member on the work machine body side and the leveling member on the extension work machine side, both leveling It becomes possible to close the gaps between the side portions between the members with the plate-like projecting members, and it is possible to prevent the mud from flowing out from the gaps between the two leveling members with a simple structure.
[0025]
The connecting means between the leveling members includes a first leveling member (apron) that is pivotally supported by the machine body as a leveling member and a second leveling member (level plate) that is pivotally supported below the first leveling member. In such a case, each leveling member can be provided mutually.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0027]
FIG.1 and FIG.2 is an external view of the rotary working machine which is a folding agricultural working machine. The rotary work machine 1 is a rotary halo that has a long work width in the left-right direction and can perform wide crushed soil or scraping work in one stroke. A connecting portion 2 connected to a three-point link hitch mechanism comprising a top link and a lower link of a tractor (not shown) is provided at a front central portion of the rotary work machine 1. It is connected by the connection part 2 so that raising / lowering is possible. In addition, power is transmitted from the PTO shaft of the tractor to the gear box 3 through transmission means such as a universal joint.
[0028]
The rotary work machine 1 includes a work machine body 4 at a central portion having a work width slightly wider than a tractor tire interval, and an extended work machine body 5L provided to extend the work width to the left and right of the work machine body 4. 5R, and has a structure that is divided into three by the work machine body 4 and the extension work machines 5L and 5R. And the extension work machine bodies 5L and 5R are connected so as to be able to rotate about 180 ° by the rotation support parts 6 and 6 provided on the fixed cover member 15 of the work machine body 4, and as shown in FIG. The folded state can be maintained by superimposing the back surface of the work machine body 4 and the back surfaces of the extension work machine bodies 5L and 5R arranged on the left and right sides. In addition, when extending the working width, one or both of the extension work machines 5L and 5R can be held horizontally with respect to the work machine body 4 so that the above-described folded state and unfolded state can be maintained. And can be selected.
[0029]
Here, the work implement body 4 has a work width wider than the tire interval of the tractor as described above, so that the wheel marks attached to the field by the tire of the tractor can be erased. In addition, the extension work machine bodies 5L and 5R are set to be less than or equal to half the length of the work machine body 4 so that both the left and right sides can be folded.
[0030]
And the fixed cover members 15 and 15a mentioned above are provided in the upper part in each of the working machine main body 4 and the extension working machine bodies 5L and 5R, respectively, and then a leveling plate (first leveling member) 16 is provided at each of the lower ends. , 16a is pivotally mounted via a pivot shaft 16b. Further, the base ends of leveling plates (second leveling members) 17 and 17a are pivotally supported by the pivot shaft 17b at the rear ends of the leveling plates 16 and 16a. Here, the flat plate 17 in the work machine body 4 is supported at the center in the width direction via the flat plate control body 18, and the flat plate 17 can be freely rotated by the pivot shaft 17b. And the fixed state in which the rotation of the flat plate 17 is regulated on the lower side and the soiling of the scraped soil is carried out, and this selection is made so that the tractor operator can operate in the driving state. Yes.
[0031]
Further, leveling plate connecting means 19 are provided on both sides of the leveling plate 16 in the work machine main body 4 and the leveling plates 16a and 16a in the extension work machines 5L and 5R. Flat plate connecting means 20 is provided on both sides of the flat plates 17a and 17a in the work machine bodies 5L and 5R. Reference numerals 193 and 201 in FIG. 2 indicate projecting members in the leveling plate connecting means 19 and the leveling plate connecting means 20, respectively.
[0032]
On the left and right sides of the gear box 3, a main body frame 7 for supporting the work machine main body 4 is extended. In this working machine body 4, a transmission case 8 is suspended from one end side of the main body frame 7, and a support frame 9 is suspended from the other end side. A rotary working unit is provided between the transmission case 8 and the support frame 9. 10 is mounted on the shaft. Further, in the extension work machine bodies 5L and 5R, an extension rotary work part 13 (13A indicates an extension rotary shaft and 13B indicates a rotary claw) is provided between the shaft support parts 14 and 14. Reference numeral 11 denotes a connection part exposed on the side surface of the transmission case 8 (projection piece 11A, cylindrical body 21), and 12 denotes a connection part exposed to the outside of the shaft support part.
[0033]
FIG. 3 is an explanatory diagram for explaining the drive unit of the rotary working machine described above. The same parts as those described above are denoted by the same reference numerals. The gear box 3 protrudes from an input shaft 3A to which power from the PTO shaft of the tractor is input via a transmission means such as a universal joint. The power input to the input shaft 3A is transmitted to the gear transmission mechanisms 3B and 3C. The transmission shaft 7A, the sprocket 8A in the transmission case 8 and the chain 8B are transmitted to the rotary shaft 10A.
[0034]
The rotary shaft 10 A has a plurality of rotary claws 10 B projecting from its peripheral surface, and both ends thereof are pivotally supported by the shaft support portions 4 A and 4 A of the work machine body 4 to form the rotary work portion 10. The extended rotary shaft 13A has a plurality of rotary claws 10B projecting from its peripheral surface, and both ends thereof are pivotally supported by the shaft support portions 14 of the extension work machine bodies 5L and 5R to form the extended rotary work portion 13. Yes.
[0035]
And the connection part 11 is exposed to the outer side from the side surface of the working machine main body 4 in the both ends of 10 A of rotary shafts. Further, the connected portion 12 connected to the connecting portion 11 (projecting piece 11A, cylindrical body 21) is exposed from the side surface of the extension work machine body 5L, 5R, and is provided at one end portion of the extension rotary shaft 13A. Yes. Accordingly, when the extension work machine bodies 5L and 5R are expanded horizontally with respect to the work machine body 4, the connection part 11 at the end of the rotary shaft 10A and the connected part 12 at the end of the extension rotary shaft 13A are connected, Power is transmitted to the extended rotary shaft 13A via the rotary shaft 10A. Further, in a state where the rotary shaft 10A and the extended rotary shaft 13A are detached and the extension work machine bodies 5L and 5R are folded with respect to the work machine body 4, the rotary shaft 10A is driven alone.
[0036]
Hereinafter, the leveling plate connecting means 19 and the leveling plate connecting means 20 will be described in detail with reference to FIGS. FIG. 4 is a plan view showing a connecting portion between the leveling plates 16 and 16a and the leveling plates 17 and 17a. 5 is a partial cross-sectional view taken along line AA in FIG. 4, and FIG. 6 is a side view taken along line BB. The same parts as those in the above-mentioned drawings are denoted by the same reference numerals, and a part of the description is omitted.
[0037]
The leveling plate connecting means 19 includes a first cooperative body and a second cooperative body, and includes a projecting member 191 projecting from the upper side of the leveling member 16 on the work machine main body side, and a leveling plate 16a side on the extended work machine side. A first cooperative body is formed by the projecting pins 192 projecting from the upper part of the section, and a plate-shaped projecting member 193 serving as a projecting member projecting from the lower side of the leveling plate 16 on the work machine body side, and a leveling plate 16a on the extended work machine side. A second cooperating body is formed by a plate-like projecting member 194 serving as a projecting member projecting from the lower side of the side portion.
[0038]
Similarly, the flat plate connecting means 20 is also composed of a first cooperative body and a second cooperative body, and a contact member 201A formed on the upper portion of the protruding member 201 protruding from the side portion of the flat plate 17 on the work machine main body side. The first cooperating body is formed by the projecting pin 202 projecting from the upper side of the leveling plate 17a on the extension work machine side, and is in contact with the lower part of the projecting member 201 projecting from the leveling plate 17 on the work machine body side. A second cooperative body is formed by the member 201B and a plate-like projecting member 203 that serves as a projecting member projecting from the lower side of the flat plate 17a on the extension work machine side (see FIG. 6).
[0039]
The projecting pin 192 is supported by the side portion and the support portion 192A of the leveling plate 16a on the extension work machine side, and is urged by the spring 192B toward the main body work machine side so that it can project and retract. Further, an auxiliary support pin 192C is formed on the projecting pin 192 in a bifurcated manner and is supported by a hole on the side of the leveling plate 16a. On the other hand, the projecting pin 202 in the flat plate 17a is supported by the support frame 202A and is urged by the spring 202B toward the main body work machine side so that it can project and retract.
[0040]
According to leveling plate coupling means 19 of this structure, the working machine body 4 extending working body 5L respect, a state of FIG. 4 and FIG. 5 in a state of horizontal and developed 5R, extended working body side of the leveling plate The projecting pin 192 projects from the side portion 16a and overlaps with the projecting member 191 projecting from the side surface of the leveling plate 16 on the main body side of the work machine, and comes into contact with the side portion of the leveling plate 16, whereby the first cooperative body functions. It becomes a state. Further, the plate-like projecting member 193 projecting below the side portion of the leveling plate 16 on the work machine main body side overlaps the plate-like projecting member 194 projecting below the side portion of the leveling plate 16a on the extension work machine side. Thus, the second cooperative body will function.
[0041]
That is, in this state, when the leveling plate 16 on the work machine main body side is raised, the protruding member 191 comes into contact with the protruding pin 192 and pushes up, so that the leveling plate 16a on the extended work machine side is raised together. When the leveling plate 16 on the work machine body side is lowered, the plate-like projecting member 193 on the work machine body side comes into contact with and pushes down the plate-like projecting member 194 on the extension work machine body side. Thus, the leveling plate 16a on the extension work machine side is moved down together. Therefore, in a state where the first and second cooperative bodies are functioning, the leveling plates 16 and 16a move up and down integrally.
[0042]
Similarly, according to the leveling plate connecting means 20, the extension work machine bodies 5L and 5R are horizontally deployed with respect to the work machine body 4, and the state shown in FIGS. 4 and 6 is obtained, and the leveling plate 17a side on the extension work machine side is obtained. The protruding pin 202 protrudes from the portion and overlaps on the abutting member 201A of the protruding member 201 protruding from the leveling plate 17 side portion on the work machine main body side, and the first cooperative body becomes functional. Further, the contact member 201B below the projecting member 201 projecting to the side of the leveling plate 17 on the work machine main body side is above the plate-shaped projecting member 203 projecting to the lower side of the leveling plate 17a on the extension work machine side. It will be in the state which overlaps with, and a 2nd cooperative body will function.
[0043]
That is, in this state, when the leveling plate 17 on the work machine body side is raised, the contact member 201A comes into contact with the protruding pin 202 and pushes up, so that the leveling plate 17a on the extension work machine side is raised together. When the leveling plate 17 on the work machine body side is lowered, the contact member 201B on the work machine body side comes into contact with the plate-like projecting member 203 on the extension work machine body side and pushes down. Thus, the leveling member 17a on the extension work machine side is moved down together. Therefore, in a state where the first and second cooperative bodies are functioning, the leveling plates 17 and 17a move up and down integrally.
[0044]
According to the rotary working machine 1 of such an embodiment, as shown in FIG. 1, the usage mode in which the left and right extension working machines 5L and 5R are horizontally deployed with respect to the working machine body 4 to work with a wide working width, As shown in FIG. 2, the left and right extension work machines 5 L and 5 R are folded with respect to the work machine body 4, and the working mode is such that only the work machine body 4 works. It is possible to select each usage pattern of the usage pattern in which the work width of only one of the left and right sides is widened while one of 5L and 5R is folded. Further, when traveling on the road or being stored in the warehouse, the working machine body 4 is lifted up to the non-working position, and the left and right extension work machines 5L and 5R are folded with respect to the working machine body 4 in this state. It can also be.
[0045]
When the extension work machine bodies 5L and 5R are folded from the work machine main body 4 to the horizontal unfolded state, the projecting pins 192 are in a projecting state, and the state shown in FIG. And the 2nd cooperation body functions and the leveling boards 16 and 16a will be in the state integrated.
[0046]
On the other hand, since the flat plate 17a on the extension work machine side hangs down by its own weight and is in the lowermost state, the flat plate 17, 17a is in the lowermost state until the flat plate 17, 17a receives the grounding resistance in the unfolded state. Thus, the leveling plate 17a on the extended work machine side is positioned below the leveling plate 17 on the working machine body side. In this state, when the leveling plates 17 and 17a are grounded to the work surface of the farm field, the leveling plate 17a on the extension work machine side rises, and the protruding pin 202 that comes into contact with the guide plate 201C on the side surface of the protruding member 201 becomes the guide plate. When the flat plates 17 and 17a are temporarily retracted by the action of 201C and have the same height due to the grounding resistance, the contact member 201B of the protruding member 201 contacts the plate-shaped protruding member 203, and on the contact member 201A The protruding pin 202 protrudes. Thereby, the first and second cooperating bodies can be made to function without particularly operating the leveling plate 17, and both leveling plates 17, 17a can be connected. Even in such an unfolded state, the projecting pins 192 and 202 can project and retract, so that the leveling plates 16 and 16a and the leveling plate 17 can be retracted by retracting them toward the extension work machine against the elasticity. 17a can be independent of each other.
[0047]
Further, when the extension work machine bodies 5L and 5R are folded on the upper part of the work machine body 4, the tip of the projecting pin 192 is opened, so that the projecting pin 192 is slid by the action of the spring 192B and the auxiliary support pin 192C is not shown. The leveling plate 16a can be fixed by being supported by the support portion of the fixed cover member 15a on the extended work machine side.
[0048]
According to such an embodiment, the leveling plate connecting means 19 or the leveling plate connecting means 20 is provided with the leveling plates 16 and 16a or the leveling plates 17 and 17a as the leveling plate 16 or the leveling plate 17 on the work machine body side rises. And a second cooperating body that cooperates both the leveling plates 16 and 16a or the leveling plates 17 and 17a with the lowering of the leveling plate 16 or the leveling plate 17 on the work machine main body side. Therefore, it is not necessary to provide a fitting recess in each leveling plate 16, 16a or leveling plate 17, 17a. Since the fitting recess does not get clogged with soil during the operation, the two leveling plates 16 and 16a or the leveling plates 17 and 17a can be reliably connected.
[0049]
Further, the leveling plate 16 on the work machine main body side, the projecting member 191 projecting from the leveling plate 17, the plate-like projecting member 193, the projecting member 201, the leveling plate 16 a on the extension work machine side, and the projecting pin 192 projecting from the leveling plate 17 a Since the plate-like projecting member 194, the projecting pin 202, and the plate-like projecting member 203 are not coupled at all, when the extension work machines 5L and 5R are folded with respect to the work machine body 4, there is no particular release operation. Both the leveling plates 16, 16a or the leveling plates 17, 17a can be separated. This makes it possible to simplify the apparatus.
[0050]
State Furthermore, at the time of deployment, the ground leveling plate plate-like protrusion is formed along the sides of the 16,16a member 193 and 194 are overlapped between the machine body side of the ground leveling plate 16 and the extension work inboard of the leveling plate 16a since the, results in closing the gap side between the two leveling plates 16,16a in the plate-like protrusion members 193 and 194, that the mud from the gap between the leveling plate 16,16a is prevented from flowing out it can.
[0051]
【The invention's effect】
Since this invention is comprised in this way, when connecting the leveling member in a folding agricultural work machine, a reliable connection is possible, and also it prevents the mud from flowing out between the leveling members connected with a simple structure. can do.
[Brief description of the drawings]
FIG. 1 is an external view (when unfolded) of a rotary working machine that is a folding agricultural working machine of the present invention.
FIG. 2 is an external view (when folded) of a rotary working machine which is a folding agricultural working machine of the present invention.
FIG. 3 is an explanatory diagram illustrating a drive unit of a rotary working machine that is a folding agricultural working machine according to the present invention.
FIG. 4 is a plan view showing a ground leveling member according to an embodiment of the present invention and a connecting portion of leveling plates.
FIG. 5 is a partial cross-sectional view taken along line AA in FIG.
6 is a BB side view in FIG. 4. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotary work machine 2 Connection part 3 Gear box 4 Work machine main body 4A Shaft support part 5L, 5R Extension work machine body 6 Rotation support part 7 Main body frame 8 Transmission case 9 Support frame 10 Rotary work part 13 Extension rotary work part 15, 15a Fixed cover Member 16, 16a Leveling plate (first leveling member)
17, 17a Flat plate (second leveling member)
18 Leveling plate control body 19 Leveling plate connecting means 191 Protruding member (first cooperating body)
192 Protruding pin (first cooperative body)
193,194 Plate-like projecting member (second cooperative body)
20 Hitoshitaira plate coupling means 201 projecting member 201A contact member (first co body), 201B contact member (second co body)
201C Guide plate 202 Protruding pin (first cooperating body)
203 Plate-like protruding member (second cooperative body)

Claims

トラクタの後部に昇降可能に連結され、該トラクタからの動力により駆動されるロータリ作業部を備えた作業機本体と、該作業機本体に対して作業幅を延長するように配備される延長作業機体とからなり、前記作業機本体に対して前記延長作業機体を水平に展開した状態と、前記作業機本体に対して前記延長作業機体を折り畳んだ状態とを選択可能にした折り畳み農作業機において、
前記作業機本体及び前記延長作業機体は機体の後方下部に上下動可能に軸支された整地部材を備え、該各整地部材には、前記展開した状態で両整地部材を連結させる連結手段が設けられ、
該連結手段は、前記作業機本体側の整地部材の上昇に伴って両整地部材を協動させる第１協動体と前記作業機本体側の整地部材の下降に伴って両整地部材を協動させる第２協動体とからなり、
前記第１及び第２協動体は、それぞれ両整地部材の対向側部から突出する一対の突出部材からなり、前記第１協動体を構成する一方の突出部材は前記延長作業機体側の整地部材の側部から前記作業機本体側へ突出し、前記作業機本体に当接する突出ピンであり、他方の突出部材は前記突出ピンに重なり得る板状であり、
前記突出ピンは前記延長作業機体側の整地部材における側部及び支持部に支持され、前記作業機本体側に向けて付勢された状態で、前記作業機本体側へ突没可能であることを特徴とする折り畳み農作業機。A work machine main body having a rotary working unit that is connected to the rear part of the tractor so as to be movable up and down and is driven by power from the tractor, and an extended work machine body that is arranged to extend the work width with respect to the work machine main body In the folding agricultural work machine that can select a state in which the extension work machine body is horizontally deployed with respect to the work machine body, and a state in which the extension work machine body is folded with respect to the work machine body,
The working machine main body and the extension work machine body include a leveling member that is pivotally supported at the rear lower part of the machine body so as to be movable up and down, and each leveling member is provided with a connecting means for connecting both leveling members in the unfolded state. And
The coupling means cooperates the first leveling body that cooperates with the two leveling members as the leveling member on the work machine body side rises and the leveling members as the leveling member on the side of the work machine body descends. Consisting of a second collaborator,
Each of the first and second cooperating bodies includes a pair of projecting members projecting from opposing sides of both leveling members, and one projecting member constituting the first cooperating body is a leveling member on the extension work machine side. It is a protruding pin that protrudes from the side to the working machine main body side and abuts against the working machine main body , and the other protruding member is a plate shape that can overlap the protruding pin ,
The projecting pin is supported by the side portion and the support portion of the leveling member on the extension work machine side, and can be projected and retracted to the work machine body side while being biased toward the work machine body side. Folding agricultural machine that features.

前記第１協動体における作業機本体側の突出部材は延長作業機体側の突出部材の下に重ねられ、前記第２協動体における作業機本体側の突出部材は延長作業機体側の突出部材の上に重ねられることを特徴とする請求項１記載の折り畳み農作業機。 The projecting member on the work machine main body side of the first cooperative body is stacked under the projecting member on the extension work machine body side, and the projecting member on the work machine main body side of the second cooperative body is above the projecting member on the extension work machine body side. The folding agricultural work machine according to claim 1, wherein

前記第２協動体は、整地部材の側部に沿って形成される板状突出部材からなることを特徴とする請求項１、もしくは請求項２に記載の折り畳み農作業機。The folding agricultural work machine according to claim 1 , wherein the second cooperative body includes a plate-like projecting member formed along a side portion of the leveling member.

前記整地部材は、前記機体に軸支される第１整地部材と該第１整地部材の下方に軸支される第２整地部材とからなり、前記連結手段が前記第１整地部材及び第２整地部材のそれぞれに設けられることを特徴とする請求項１〜３の何れかに記載の折り畳み農作業機。The leveling member includes a first leveling member pivotally supported by the airframe and a second leveling member pivotally supported below the first leveling member, and the connecting means includes the first leveling member and the second leveling level. The folding agricultural machine according to any one of claims 1 to 3 , wherein the folding agricultural machine is provided on each of the members.