JP2004033020A

JP2004033020A - Foldable agricultural implement

Info

Publication number: JP2004033020A
Application number: JP2002190603A
Authority: JP
Inventors: Takashi Okamoto; 岡本　孝志; Akihiko Kakimi; 垣見　明彦; Toru Abe; 阿部　徹
Original assignee: Kobashi Industries Co Ltd
Current assignee: Kobashi Industries Co Ltd
Priority date: 2002-06-28
Filing date: 2002-06-28
Publication date: 2004-02-05
Anticipated expiration: 2022-06-28
Also published as: JP4201534B2

Abstract

PROBLEM TO BE SOLVED: To surely connect land grading members and to prevent mud from outflowing from an interval between the land grading members connected with a simple structure when connecting the land grading member in the foldable agricultural implement. SOLUTION: The foldable agricultural implement comprises a land grading member connecting means 19 or a leveling plate connecting means 20 for connecting the land grading members 16 and 16a or the leveling plates 17 and 17a. The land grading member connecting means 19 or the leveling plate connecting means 20 is composed of first cooperating bodies (191, 192, 201 and 202) for cooperating both the land grading members 16 and 16a or leveling plates 17 and 17a according to lifting of the land grading member 16 or leveling plate 17 on the implement body side and second cooperating bodies (193 and 194) for cooperating both the land grading members 16 and 16a or the leveling plates 17 and 17a according to lowering of the land grading member 16 or the leveling plate 17 on the implement body side. COPYRIGHT: (C)2004,JPO

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部材（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、整地部材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における整地部材１６と延長作業機体５Ｌ，５Ｒにおける整地部材１６ａ，１６ａの両側部には、整地部材連結手段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はそれぞれ整地部材連結手段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、整地部材連結手段１９及び均平板連結手段２０について詳細に説明する。図４は整地部材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】
整地部材連結手段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部材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部材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部材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部材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、整地部材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部材連結手段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部材１６ａ側部から突出ピン１９２が突出して作業機本体側の整地部材１６側部から突出している突出部材１９１上に重なり、整地部材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部材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部材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部材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部材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部材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部材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、整地部材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部材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、整地部材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、整地部材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、整地部材連結手段１９又は均平板連結手段２０は、作業機本体側の整地部材１６又は均平板１７の上昇に伴って両整地部材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部材１６又は均平板１７の下降に伴って両整地部材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、それぞれの整地部材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、両整地部材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部材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部材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、両整地部材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、整地部材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部材１６と延長作業機体側の整地部材１６ａの間で重なり合った状態になるので、両整地部材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、両整地部材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　整地部材（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　整地部材連結手段
１９１　突出部材
１９２　突出ピン
１９３，１９４　板状突出部材
２０　整地板連結手段
２０１　突出部材
２０１Ａ，２０１Ｂ　当接部材
２０２　突出ピン
２０３　板状突出部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a foldable agricultural work machine in which an extension work machine is provided for a work machine main body which is connected to a rear part of a tractor so as to be able to move up and down, and the extension work machine is provided so as to be foldable with respect to the work machine body.
[0002]
[Prior art]
As this type of folding agricultural working machine, a rotary working machine that performs tilling, leveling, or scraping work is known. In this rotary working machine, the working machine main body at the center of the working width is connected to the rear of the tractor via a vertically movable connecting device, and an extended working body for extending the working width is folded on both left and right sides of the working machine main body. Deployed as possible. Here, the rotary working part of the working machine body is driven to rotate by the power from the tractor, and the extended rotary working part of the extended working body connects the rotary shaft end of the rotary working part to the rotary shaft end of the extended rotary working part. To be driven to rotate. Therefore, with this folding rotary working machine, it is possible to perform narrow work using the working machine body alone in a state where the left and right extended working bodies are folded with respect to the center of the working machine body. Further, it is also possible to work in a state where one or both of the left and right extension working bodies are expanded horizontally and the working width is extended.
[0003]
In such a rotary working machine, a ground leveling member for leveling mud crushed by the rotary working unit is pivotally supported at the lower rear portion of the body on each of the main body and the extended working body. In the state where the extension work body is folded with respect to the work machine main body, it is necessary to separate each leveling member, and in a state where the extension work body is horizontally deployed with respect to the work machine body, It is necessary to connect the respective leveling members so that the respective leveling members move up and down integrally.
[0004]
As described in Japanese Patent Application Laid-Open No. 2000-342001, as means for connecting the leveling members in such a folding agricultural work machine, one of the opposing side portions of each of the leveling members on the work machine body side or the extended work machine body side is used. When the fitting convex portion is provided, and the fitting concave portion is provided on the other side opposite to the working machine body, when the extended working machine body is expanded horizontally with respect to the working machine main body, the fitting convex portion of one of the leveling members becomes the other. Is known that is fitted into a fitting concave portion of the ground preparation member and connects both the ground preparation members.
[0005]
[Problems to be solved by the invention]
According to the connecting means of the leveling member in such a folding agricultural working machine, the fitting recess is provided on one of the side portions of the working machine main body or the extension working machine body, so that the fitting which is exposed when working in the folded state. There is a problem that soil or the like enters the concave portion and closes the concave portion, so that connection of the leveling member cannot be performed smoothly.
[0006]
In addition, when the leveling member on the side of the working machine and the leveling member on the side of the extended working body are connected by uneven fitting, a gap is created between the sides of both leveling members unless the mechanical assembly accuracy is significantly increased. There is a problem that the mud crushed in the rotary working section flows out from this gap, and the required leveling function cannot be achieved. Further, when a high assembling accuracy is required, there has been a problem that the structure is complicated, the cost is increased, and high productivity cannot be obtained.
[0007]
An object of the present invention is to address such a problem. More specifically, when connecting a leveling member in a folding agricultural machine, reliable connection is possible, and furthermore, a simple structure The purpose of the present invention is to prevent the mud from flowing out between the connected leveling members.
[0008]
[Means for Solving the Problems]
In order to achieve such an object, the invention according to each claim of the present invention has the following features.
[0009]
According to the first aspect of the present invention, there is provided a working machine main body including a rotary working unit which is connected to a rear portion of a tractor so as to be able to move up and down and is driven by power from the tractor, and extends a working width with respect to the working machine body. And a state in which the extension work body is horizontally deployed with respect to the work machine body and a state in which the extension work 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 are provided with a leveling member pivotally supported at a lower rear portion of the body so as to be able to move up and down, and each of the leveling members includes both the leveling members in the unfolded state. A connecting means for connecting the first cooperating body that cooperates with the grounding member along with the rise of the grounding member on the side of the work machine body and the lowering of the grounding member on the side of the work machine body. Accompanying Characterized by comprising the second cooperating elements which cooperate with member.
[0010]
The invention according to claim 2 is based on the above-mentioned folding agricultural work machine, wherein the first cooperating body and the second cooperating body are each composed of a pair of projecting members projecting from opposing side portions of both the leveling members. In one cooperative body, the projecting member on the working machine body side is overlapped below the projecting member on the extended working machine body side, and in the second cooperating body, the projecting member on the working machine body side is placed above the projecting member on the extended working machine body side. It is characterized by being superimposed on.
[0011]
The invention according to claim 3 is based on the above-mentioned folding agricultural work machine, and one of the pair of projecting members is a member held so as to be able to protrude and retract toward the other opposing member, and the other is provided on the member. It is characterized by having an abutting surface for abutting.
[0012]
According to a fourth aspect of the present invention, on the premise of the above-described folding agricultural 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 grounding members are ground resistance. When receiving the same height, the one protruding member once retracted by the guide plate protrudes above the contact surface of the other protruding member.
[0013]
The invention according to claim 5 is characterized in that the first or second cooperating body is formed of a plate-shaped protruding member formed along a side portion of the leveling member, on the premise of the folding agricultural work machine described above.
[0014]
The invention according to claim 6 is based on the above-mentioned folding agricultural work machine, wherein the leveling member is a first leveling member pivotally supported by the body and a second leveling member pivotally supported below the first leveling member. Wherein the connecting means is provided on each of the first leveling member and the second leveling member.
[0015]
According to the inventions according to the respective claims, the following operations are performed.
[0016]
That is, the folding agricultural working machine is connected to the rear of the tractor so as to be able to move up and down, and has a working machine main body including a rotary working portion driven by power from the tractor, and extends a working width with respect to the working machine main body. Since the extension work body is deployed horizontally, the state where the extension work body is expanded horizontally with respect to the work machine body and the state where the extension work body is folded with respect to the work machine body are selectable, In the state where the left and right extension work bodies are folded with respect to the center work machine body, it is possible to use the work machine body alone to perform narrow work, and It is also possible to install one or both of them in the extended state and work in a state where the working width is extended.
[0017]
The work machine body and the extension work body are provided with a leveling member pivotally supported at the rear lower part of the body so that the work machine body and the extension work body are unfolded. Is provided, so that when the deployment is performed, the two leveling members can be connected and moved up and down integrally, and uniform leveling can be performed within the extended working width, When the extension work body is folded with respect to the main body, each leveling member can be separated.
[0018]
The connecting means for connecting the grounding members pivotally supported on the body of the working machine body and the extended working body is a first cooperating body for cooperating the grounding members with the rise of the grounding member on the working machine body side. And the second cooperating body that cooperates with the leveling member as the leveling member on the work machine body descends, so that it is not necessary to provide a fitting recess in each of the leveling members. Since the soil is not clogged, the two leveling members can be reliably connected.
[0019]
Further, according to the folding agricultural working machine of the present invention, the first cooperating body and the second cooperating body in the above-mentioned connecting means each comprise a pair of protruding members protruding from opposing side portions of both the leveling members, and in the first cooperating body, The projecting member on the working machine body side is superimposed below the projecting member on the extended working machine body side, and in the second cooperator, the projecting member on the working machine body side is superimposed on the projecting member on the extended working machine body side.
[0020]
Therefore, when the leveling member on the side of the work implement rises in a state where the extended work body is horizontally deployed with respect to the main body of the work implement, the protruding member protruding from the side of the leveling member on the side of the ground work member on the extended work body side When the leveling member on the working machine body side is lowered, the protruding member protruding from the side of the leveling member on the working machine body side is moved toward the side of the leveling member on the extended working machine body side. The protruding member protruding from the portion is pushed down. Thereby, at the time of unfolding, the leveling member pivotally supported by the work machine body and the leveling member pivotally supported by the extension work body can be moved up and down integrally.
[0021]
Further, since the projecting member projecting from the grounding member on the working machine body side and the projecting member projecting from the grounding member on the extended working machine body side are not connected at all, when the extended working machine body is folded with respect to the working machine body. In particular, both leveling members can be separated without performing a releasing operation. This allows for simplification of the device.
[0022]
Further, according to the folding agricultural working machine of the present invention, one of the pair of projecting members described above is a member that is held so as to be able to protrude and retract toward the other opposing member, and the other has a contact surface that contacts this member. Have. According to this, even when the extension work body is deployed horizontally with respect to the work machine body, the resilient projecting member can be retracted against the elasticity when necessary for maintenance or the like. In addition, the leveling member on the working machine body side and the leveling member on the extension working machine side can be made independent.
[0023]
Further, when the tip of one protruding member abuts on the guide plate on the side of the other protruding member in a state where the working machine main body and the extension working machine body are deployed, and both leveling members receive the ground resistance and become the same height. In addition, by making the one protruding member once retracted by the guide plate protrude above the contact surface of the other protruding member, the two leveling members can be connected without particularly operating the leveling member. .
[0024]
Further, according to the folding agricultural working machine of the present invention, the first or second cooperating body can be a plate-shaped projecting member formed along the side of the leveling member. According to this, at the time of deployment, the plate-shaped projecting member formed along the side of the leveling member overlaps between the leveling member on the working machine main body side and the leveling member on the extended working machine body side. The side gap between the members can be closed by the plate-shaped projecting member, and with a simple structure, muddy soil can be prevented from flowing out of the gap between the two leveling members.
[0025]
Such a connecting means between the grading members includes a first grading member (apron) pivotally supported by the body as a grading member and a second grading member (flat plate) pivotally supported below the first grading member. In each case, the respective leveling members can be provided mutually.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0027]
1 and 2 are external views of a rotary working machine that is a folding farm working machine. The rotary working machine 1 is a rotary harrow having a long working width in the left-right direction and capable of performing wide crushing or scraping work in one stroke. In the center of the front part of the rotary working machine 1, there is provided a connecting part 2 which is connected to a three-point link hitch mechanism composed of a top link and a lower link of a tractor (not shown). Are connected so as to be able to move up and down by a connecting portion 2. Also, power is transmitted from the PTO shaft of the tractor to the gearbox 3 via a transmission means such as a universal joint.
[0028]
This rotary working machine 1 includes a working machine main body 4 in a central portion having a working width slightly larger than a tractor tire interval, and an extended working body 5L, which is provided on the left and right sides of the working machine main body 4 to extend the working width. 5R, and is divided into three parts by the working machine body 4 and the extended working bodies 5L and 5R. The extension working machines 5L and 5R are connected to each other by rotation supporting portions 6 and 6 provided on the fixed cover member 15 of the working machine main body 4 so as to be able to rotate substantially 180 °. As shown in FIG. The folded state can be maintained by overlapping the back surface of the working machine body 4 and the back surfaces of the extended working machine bodies 5L and 5R provided on the left and right. Further, when the working width is extended, one or both of the extended working bodies 5L and 5R can be held in a horizontally expanded state with respect to the working machine body 4, and the above-mentioned folded state and expanded state can be maintained. And can be selected.
[0029]
Here, the work implement body 4 has a work width wider than the tractor tire interval as described above, so that wheel marks attached to the field by the tractor tires can be erased. In addition, the length of each of the extension working machines 5L and 5R is set to a half or less of the length of the working machine main body 4 so that both the left and right sides can be folded.
[0030]
The above-mentioned fixed cover members 15 and 15a are respectively provided on the upper portions of the working machine main body 4 and the extended working machine bodies 5L and 5R, and a ground leveling member (first ground leveling member) 16 is provided at each lower end thereof. , 16a are pivotally connected via a pivot 16b. The base ends of the leveling plates (second leveling members) 17, 17a are pivotally supported by pivot shafts 17b at the rear ends of the leveling members 16, 16a. Here, the leveling plate 17 in the working machine main body 4 is supported at the center in the width direction via a leveling plate control body 18, and the leveling operation state in which the leveling plate 17 can be freely rotated by the pivot shaft 17b. And a fixed state in which the rotation of the leveling plate 17 is restricted on the lower side to perform scraping of the scraping soil, etc., and this selection is made so that the tractor operator can operate in the driving state. I have.
[0031]
Also, on both sides of the leveling member 16 in the working machine body 4 and the leveling members 16a, 16a in the extension working bodies 5L, 5R, there are provided leveling member connecting means 19, which extend from the leveling plate 17 in the working machine body 4. On both sides of the leveling plates 17a, 17a of the working machine bodies 5L, 5R, leveling plate connecting means 20 is provided. Reference numerals 193 and 201 in FIG. 2 indicate projecting members in the leveling member connecting means 19 and the leveling plate connecting means 20, respectively.
[0032]
On both left and right sides of the gear box 3, a main body frame 7 that supports the work machine main body 4 is extended. A transmission case 8 is suspended from one end of a main body frame 7 of the working machine body 4, and a support frame 9 is suspended from the other end, and a rotary working unit is provided between the transmission case 8 and the support frame 9. 10 is mounted on the shaft. In the extension working bodies 5L and 5R, an extended rotary working portion 13 (13A indicates an extended rotary shaft, and 13B indicates a rotary claw) is axially mounted between the shaft supports 14 and 14. Reference numeral 11 denotes a connecting portion exposed on the side surface of the transmission case 8 (the protruding piece 11A, the cylindrical body 21), and reference numeral 12 denotes a connected portion exposed on the outside of the shaft support portion 14.
[0033]
FIG. 3 is an explanatory diagram illustrating a driving unit of the rotary working machine described above. The same parts as those described above are denoted by the same reference numerals. An input shaft 3A through which power from the PTO shaft of the tractor is input via a transmission means such as a universal joint protrudes from the gearbox 3, and the power input to the input shaft 3A is transmitted to the gear transmission mechanisms 3B and 3C. Is transmitted to the rotary shaft 10A via the transmission shaft 7A, the sprocket 8A in the transmission case 8, and the chain 8B.
[0034]
The rotary shaft 10A has a plurality of rotary claws 10B protruding from a peripheral surface thereof, and both ends thereof are rotatably supported by the shaft supporting portions 4A, 4A of the working machine main body 4 to form the rotary working portion 10. The extended rotary shaft 13A has a plurality of rotary claws 10B protruding from a peripheral surface thereof, and both ends thereof are supported by the shaft supporting portions 14 of the extended working bodies 5L and 5R to form the extended rotary working portion 13. I have.
[0035]
At both ends of the rotary shaft 10 A, connection portions 11 are provided to be exposed to the outside from the side surfaces of the working machine body 4. Further, a connected portion 12 connected to the connecting portion 11 (the protruding piece 11A, the tubular body 21) is exposed from a side surface of the extension working machine body 5L, 5R, and is provided at one end of the extension rotary shaft 13A. I have. Therefore, when the extended working machine bodies 5L and 5R are deployed horizontally with respect to the working machine body 4, the connecting portion 11 at the end of the rotary shaft 10A and the connected portion 12 at the end of the extended rotary shaft 13A are in a connected state. 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 from each other and the extended work bodies 5L and 5R are folded with respect to the work machine main body 4, the rotary shaft 10A is driven alone.
[0036]
Hereinafter, the leveling member 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 connection portion between the leveling members 16, 16a and the leveling plates 17, 17a. FIG. 5 is a partial sectional view taken along line AA in FIG. 4, and FIG. 6 is a side view taken along line BB in FIG. In addition, the same reference numerals are given to the same portions as those in the above-described drawings, and the description is partially omitted.
[0037]
The leveling member connecting means 19 includes a first cooperating body and a second cooperating body. The protruding member 191 protrudes from above the side of the leveling member 16 on the working machine body side, and the side of the grounding member 16a on the extended working machine side. A first cooperating body is formed by a protruding pin 192 protruding from above the part, and a plate-shaped protruding member 193 serving as a protruding member protruding from below the side of the leveling member 16 on the working machine body side, and a leveling member 16a on the extended working machine body side A second cooperating body is formed by a plate-shaped protruding member 194 serving as a protruding member that protrudes from the lower side of the side.
[0038]
The leveling plate connecting means 20 also includes a first cooperating body and a second cooperating body, and a contact member 201A formed on an upper part of a protruding member 201 protruding from the side of the leveling plate 17 on the working machine body side. A first cooperating body is formed by a projecting pin 202 projecting from above the side of the leveling plate 17a on the side of the extended working machine body, and a contact formed below the projecting member 201 projecting from the leveling plate 17 on the working machine body side. A second cooperating body is formed by a member 201B and a plate-shaped protruding member 203 that protrudes from a lower side of the leveling plate 17a on the side of the extension working machine (see FIG. 6).
[0039]
The protruding pin 192 is supported by the side portion and the support portion 192A of the ground leveling member 16a on the extension working machine body side, and is urged by a spring 192B toward the main body working machine body to be able to protrude and retract. An auxiliary support pin 192C is formed on the protruding pin 192 so as to be divided into two, and is supported by a hole on the side of the leveling member 16a. On the other hand, the projecting pin 202 in the leveling plate 17a is supported by the support frame 202A, and is urged by a spring 202B toward the main body working machine to be able to protrude and retract.
[0040]
According to the grounding member connecting means 19 having such a structure, the state is shown in FIGS. 4 and 5 in a state where the extended working machine bodies 5L and 5R are spread horizontally with respect to the working machine body 4, and the ground working member on the extended working machine body side is provided. The first cooperator functions by the projecting pin 192 projecting from the side of the grounding member 16a and overlapping with the projecting member 191 projecting from the side of the leveling member 16 on the work machine main body side and abutting on the side of the leveling member 16. State. Further, the plate-shaped protruding member 193 projecting below the side portion of the grounding member 16 on the working machine body side overlaps the plate-shaped protruding member 194 projecting below the side portion of the grounding member 16a on the extended working machine body side. Thus, the second cooperator functions.
[0041]
That is, in this state, when the leveling member 16 on the working machine body side is raised, the protruding member 191 comes into contact with the protruding pin 192 and is pushed up, so that the leveling member 16a on the extended working machine side is also raised. When the leveling member 16 on the working machine body side is lowered, the plate-shaped projecting member 193 on the working machine body side comes into contact with the plate-shaped projecting member 194 on the extended working machine body side and is pushed down. Thus, the ground leveling member 16a on the side of the extension working machine is moved down. Therefore, when the first and second cooperating bodies are functioning, the leveling members 16, 16a move up and down integrally.
[0042]
Similarly, according to the equalizing plate connecting means 20, the state shown in FIG. 4 and FIG. 6 is obtained in a state where the extension working machine bodies 5L and 5R are developed horizontally with respect to the working machine main body 4, and the equalizing plate 17a side of the extension working machine body side The protruding pin 202 protrudes from the portion and overlaps with the contact member 201A of the protruding member 201 protruding from the side of the leveling plate 17 on the working machine main body side, and the first cooperating body functions. Further, the contact member 201B below the projecting member 201 projecting to the side of the leveling plate 17 on the working machine body side is located above the plate-like projecting member 203 projecting below the side of the leveling plate 17a on the extended working machine side. And the second cooperator functions.
[0043]
That is, in this state, when the leveling plate 17 on the working machine main body side is raised, the contact member 201A comes into contact with the protruding pin 202 and is pushed up, so that the leveling plate 17a on the extended working machine side is also raised. When the leveling plate 17 on the working machine body side is moved down, the contact member 201B on the working machine body side comes into contact with the plate-shaped protruding member 203 on the extended working machine body side and is pushed down. Thus, the ground leveling member 17a on the extension working machine body side is moved down together. Therefore, when the first and second cooperating bodies are functioning, the flat plates 17, 17a move up and down integrally.
[0044]
According to the rotary working machine 1 of such an embodiment, as shown in FIG. 1, the working form in which the left and right extended working bodies 5L, 5R are horizontally developed with respect to the working machine body 4 to work with a wide working width, As shown in FIG. 2, the working form in which the left and right extension working bodies 5 L and 5 R are folded with respect to the working machine main body 4 to work only with the working machine body 4, and the left and right extending working bodies with respect to the working machine body 4. It is possible to select each usage mode of the usage mode in which the working width of only one of the left and right sides is increased while one of 5L and 5R is folded. Also, when traveling on the road or storing in a warehouse, the working machine body 4 is lifted up to the non-working position, and the left and right extension working machines 5L, 5R are folded with respect to the working machine body 4 in this state. You can also
[0045]
When the extension working machine bodies 5L, 5R are changed from the folded state to the working machine main body 4 in a developed state, the protruding pins 192 are in a protruding state, and the state of FIG. And the 2nd cooperator functions, and the leveling members 16 and 16a will be in the integrated state.
[0046]
On the other hand, the relationship between the leveling plates 17 and 17a is that the leveling plate 17a on the side of the extension working machine is suspended by its own weight and is in the lowest position. As a result, the leveling plate 17a on the extension working machine side is located below the leveling plate 17 on the working machine body side. In this state, when the leveling plates 17, 17a are brought into contact with the work surface of the field, the leveling plate 17a on the extension working machine side rises, and the protruding pin 202 abutting on the guide plate 201C on the side surface of the protruding member 201 becomes a guide plate. The contact member 201B of the protruding member 201 comes into contact with the plate-shaped protruding member 203 when the leveling plates 17 and 17a are at the same height due to the grounding resistance, and are retreated by the action of 201C. The protruding pin 202 protrudes. This allows the first and second cooperators to function without particularly operating the leveling plate 17, and allows the leveling plates 17, 17a to be connected. Even in such a deployed state, since the protruding pins 192 and 202 can be protruded and retracted, they are retracted to the extension work body side against the elasticity, so that the leveling members 16, 16a and the leveling plate 17 are retracted. , 17a can be independent of one another.
[0047]
Further, when the extension working machine bodies 5L and 5R are folded on the upper part of the working machine body 4, the tip of the protruding pin 192 is opened, so that the protruding pin 192 is slid by the action of the spring 192B and the auxiliary support pin 192C is not shown. The leveling member 16a can be fixed by being supported by the supporting portion of the fixed cover member 15a on the side of the extended working machine body.
[0048]
According to such an embodiment, the leveling member connecting means 19 or the leveling plate connecting means 20 is provided with the leveling member 16, 16a or the leveling plate 17, 17a as the leveling member 16 or the leveling plate 17 on the work machine body rises. And a second cooperating body that cooperates the leveling members 16, 16a or the leveling plates 17, 17a with the lowering of the leveling member 16 or the leveling plate 17 on the working machine body side. Therefore, there is no need to provide a fitting recess in each of the leveling members 16, 16a or the leveling plates 17, 17a. Since soil is not clogged in the fitting concave portion during the work, it is possible to reliably connect the two leveling members 16, 16a or the leveling plates 17, 17a.
[0049]
In addition, the leveling member 16 on the working machine body side, the protruding member 191 projecting from the leveling plate 17, the plate-shaped protruding member 193, the protruding member 201 and the leveling member 16a on the extended working machine side, the protruding pin 192 protruding from the leveling plate 17a. Since the plate-shaped protruding member 194, the protruding pin 202, and the plate-shaped protruding member 203 are not connected at all, when the extension working machine bodies 5L and 5R are folded with respect to the working machine body 4, the releasing operation is not particularly performed. The two leveling members 16, 16a or the leveling plates 17, 17a can be separated. This allows for simplification of the device.
[0050]
Further, at the time of deployment, plate-like projecting members 193 and 194 formed along the side portions of the leveling members 16 and 16a are overlapped between the leveling member 16 on the working machine body side and the leveling member 16a on the extended working body side. Therefore, the gap at the side between the leveling members 16 and 16a is closed by the plate-shaped projecting members 193 and 194, so that the mud is prevented from flowing out from the gap between the leveling members 16 and 16a. it can.
[0051]
【The invention's effect】
Since the present invention is configured in this manner, it is possible to reliably connect the ground leveling members in the folding agricultural work machine, and furthermore, it is possible to prevent the mud from flowing out between the ground 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 which is a folding agricultural working machine of the present invention.
FIG. 2 is an external view (at the time of folding) 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 of the present invention.
FIG. 4 is a plan view showing a connection portion between the leveling member and the leveling plate according to the embodiment of the present invention.
FIG. 5 is a partial cross-sectional view along AA in FIG. 4;
FIG. 6 is a BB side view in FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotary work machine 2 Connecting part 3 Gear box 4 Work machine main body 4A Shaft support part 5L, 5R Extension work body 6 Rotation support part 7 Main frame 8 Transmission case 9 Support frame 10 Rotary work part 13 Extended rotary work part 15, 15a Fixed cover Member 16, 16a Leveling member (first leveling member)
17, 17a Flat plate (second leveling member)
18 Leveling Control Body 19 Leveling Member Connecting Means 191 Projecting Member 192 Projecting Pins 193, 194 Plate-shaped Projecting Member 20 Leveling Plate Connecting Means 201 Projecting Members 201A, 201B Contact Member 202 Projecting Pin 203 Plate-shaped Projecting Member

Claims

A work implement main body having a rotary working part which is movably connected to a rear part of the tractor and driven by power from the tractor, and an extended work implement provided to extend a working width with respect to the work implement main body In the folding agricultural working machine which is capable of selecting a state in which the extended working body is unfolded horizontally with respect to the working machine body and a state in which the extended working body is folded with respect to the working machine body,
The work machine main body and the extension work body are provided with a leveling member pivotally supported at the rear lower portion of the body so as to be vertically movable, and each of the leveling members is provided with a connecting means for connecting the two leveling members in the unfolded state. And
The connecting means cooperates with the first cooperating body that cooperates with the leveling member on the side of the work machine main body as the leveling member rises, and cooperates with the leveling member on the lowering of the leveling member on the side of the work machine main body. A folding agricultural working machine comprising a second cooperating body.

The first and second cooperating bodies each include a pair of protruding members protruding from opposing side portions of both the leveling members. In the first cooperating body, the protruding member on the working machine body side is a protruding member on the extended working machine body side 2. The folding agricultural machine according to claim 1, wherein the projecting member on the working machine body side is overlapped with the projecting member on the extended working machine body side in the second cooperating body. 3.

3. The device according to claim 2, wherein one of the pair of protruding members is a member that is elastically held so as to protrude and retract toward the other opposing member, and the other has a contact surface that contacts the member. 4. Folding farm work machine.

When the tip of the one protruding member abuts on the guide plate on the side of the other protruding member in the unfolded state, and when the two leveling members receive the ground resistance and become the same height, the guide plate temporarily 4. The folding farm working machine according to claim 3, wherein the retracted one protruding member protrudes above a contact surface of the other protruding member.

The folding agricultural work machine according to any one of claims 1 to 4, wherein the first or second cooperating body is formed of a plate-shaped projecting member formed along a side portion of the leveling member.

The grading member includes a first grading member pivotally supported by the body and a second grading member pivotally supported below the first grading member, and the connecting means includes the first grading member and the second grading member. The folding agricultural machine according to any one of claims 1 to 5, wherein the folding agricultural machine is provided on each of the members.