JP2004049015A

JP2004049015A - Tillage tine mounting apparatus and normally and reversely rotating rotary tillage apparatus

Info

Publication number: JP2004049015A
Application number: JP2002207050A
Authority: JP
Inventors: Kinsaku Kida; 来田　金作; Mitsuko Takeda; 武田　美津子; Takao Kida; 来田　孝雄
Original assignee: KIDA NOUSAN KK
Current assignee: KIDA NOUSAN KK
Priority date: 2002-07-16
Filing date: 2002-07-16
Publication date: 2004-02-19
Anticipated expiration: 2022-07-16
Also published as: CN100396169C; CN1720774A; CN1720772A; CN1720773A; JP3735322B2; CN100345474C; CN1720771A; CN100349503C; CN100396170C

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tillage tine mounting apparatus designed to reduce resistance during cutting in downcutting and upcutting and efficiently perform tillage operation by a simple structure and to provide a normally and reversely rotating rotary tillage apparatus. <P>SOLUTION: Tine members 16 composed of base parts 20 and tine parts 21 are fitted freely rotatably around a rotary shaft 15 and rotating members 24 are fitted to both sides thereof so as to be freely movable only in the shaft direction. Circular arc slots 22 are bored in each base part 20 and hole parts 26 are bored oppositely to the slots 22 in each rotating member 24. Rodlike members 28 are passed through the hole parts 26 and freely fitted into the slots 22. When the rotary shaft 15 is rotated, the rotating members 24 and rodlike members 28 are rotated following to the rotation of the rotary shaft 15. The tine members 16 on contact with cultivated soil are rotated by the length of the slots 22 in the reverse direction, then regulated with the rodlike members 28 and forced into the cultivated soil. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、耕耘爪を軸に取り付けるための耕耘爪取付装置、そして、耕耘爪が耕土に対して下向きに回転切削するダウンカットロータリと、逆に上向きに回転切削するアップカットロータリとを適宜切換可能な正逆転ロータリ耕耘装置に関する。
【０００２】
【従来の技術】
正逆転ロータリ耕耘装置では、ダウンカット時には耕耘爪がその根元側から順に耕土に切り込むようにして切削する際の抵抗を抑えるようにする必要があり、アップカット時には装置の進行方向とは逆方向に耕土中を耕耘爪が回転するためダウンカットの時よりも大きな抵抗を受けることからその対策を講じる必要がある。
【０００３】
ダウンカット用に根元から後ろ方向に湾曲した耕耘爪を使用すると、アップカットではそのまま使用することができないため耕耘爪を取り替えることが必要となるが、手間がかかることから、耕耘爪を直刀形状に成形して回転方向に揺動することが考えられている。例えば、特公平６−７５４４１号公報では、ロータリ軸と直交する方向に延びる爪取付フランジを固設し、その先端部に枢支ピンにより両側端縁に刃縁を形成した作業爪を枢着した点が記載されている。作業爪は爪取付フランジに設けられたストッパにより所定角度だけ揺動可能に規制されている。また、特公平６−１２９６１号公報には、爪軸とほぼ直交する方向にブラケットを固定し、ブラケットに耕耘爪を装着して枢軸を支点に揺動可能とした点が記載されており、そして、耕耘爪の両側縁にダウンカット用刃部とアップカット用刃部をそれぞれ湾曲して形成し、それぞれの切削時の抵抗を減少するようにしている。
【０００４】
また、特許第３２６４７３０号公報では、耕耘軸にホルダを固設してホルダ内に耕耘爪の取付基部を嵌挿し、取付基部とホルダとにピンを挿通して抜け止めするとともに、ホルダ内に取付基部を押圧する押えバネを装着して耕耘爪のがたつきを抑えるようにした点が記載されている。
【０００５】
【発明が解決しようとする課題】
以上のような従来技術では、いずれもロータリ軸に固定されたフランジやブラケットに耕耘爪を装着しているため、取付位置が固定されてしまう。したがって、耕土の状況に応じた設定を行うことが困難である。また、フランジやブラケットへの耕耘爪の取り付けをピンで枢支しているため、使用している間にがたつきが生じてくることは避けられない。特許第３２６４７３０号公報のように、押えバネを用いることも考えられるが、構造が複雑になり、また、長期間使用すればいずれがたつきが生じてくるようになる。
【０００６】
そこで、本発明では、簡単な構造でダウンカット及びアップカットでの切削時の抵抗を減少し効率的な耕耘作業を行うことが可能な耕耘爪取付装置及び正逆転ロータリ耕耘装置を提供することを目的とするものである。
【０００７】
【課題を解決するための手段】
本発明に係る耕耘爪取付装置は、爪部と棒状の軸に嵌合する基部とを有し前記軸の軸方向に移動自在であるとともに前記軸の回りを回動自在である爪部材と、前記爪部材を前記軸の回動動作に追従して回動させるとともに前記爪部材が所定角度だけ前記軸の回りを回動自在となるようにする規制手段を備えたことを特徴とする。さらに、前記爪部材の基部には、前記軸の軸心を中心とする円周に沿って円弧状の長孔が穿設されており、前記規制手段は、前記軸に嵌合し前記軸の軸方向にのみ移動自在であるとともに前記軸の回動動作に追従して回動する回動部材と、前記回動部材に突設され前記爪部材の長孔に遊嵌する規制部材とを備えており、前記爪部材は、前記規制部材により前記長孔の両端で規定される所定角度だけ前記軸の回りを回動自在とされていることを特徴とする。
【０００８】
そして、本発明に係る正逆転ロータリ耕耘装置は、上記の耕耘爪取付装置により取り付けた爪部材を所定間隔置いてロータリ軸に複数嵌合されていることを特徴とする。さらに、各爪部材の爪部が前記ロータリ軸の軸方向からみて所定角度ずつずれて配置されていることを特徴とする。
【０００９】
本発明に係る耕耘爪取付装置は、上記のような構成を有することで、爪部材の基部自体が軸の回りを回動するようになるため、ダウンカット及びアップカットのいずれの場合にも耕土に爪部材の爪部が接地した際に爪部材全体が所定角度回動して耕土の切削動作に入るようになり、徐々に爪部材が耕土内に入っていくことでその抵抗を減少させることができる。また、爪部材全体が回動することから、爪部の側縁全体で接地するようにすることが容易であるから、爪部材にかかる負荷が一部に集中することを避けることができる。さらに、爪部材の基部が軸に嵌合しているため、従来技術のようなピンで枢支する場合のようながたつきを生じるようなことはない。そして、爪部材は軸方向に移動自在であることから、爪部材の軸方向の取付位置を任意に設定でき、取り付ける爪部材の数に応じて軸方向に適宜取り付ければよい。また、爪部材は回動自在でもあることから、爪部材の回転方向の取付位置も任意で設定でき、軸方向から見て所定角度ずつずらせてスクリューのように取り付けることも簡単にできるようになる。このような耕耘爪取付装置により複数の爪部材をロータリ軸に装着した正逆転ロータリ耕耘装置は、装着する爪部材の数を選択したり、取付位置も適宜設定でき、またスクリューのように爪部材をずらせて取り付けることで、耕土の状況に応じた最適の耕耘作業を行うことができる。特に、スクリューのように爪部材を取り付けることで、耕耘動作時の振動が減少し、駆動装置の馬力も小さくできるとともに、耕土の反転も全体にバランスよく行うことができる。
【００１０】
爪部材の基部に円弧状の長孔を穿設し、規制手段として、上記のような回動部材と規制部材を用いることで、簡単な構造で確実に爪部材を規制しながら軸の回動に追従して回動させることができる。また、各部材を軸に嵌合するだけで取り付けることができるので、取付作業を簡略化することが可能となる。
【００１１】
また、本発明に係る正逆転ロータリ耕耘装置は、正六角形の断面形状を有するロータリ軸と、前記ロータリ軸の断面である正六角形の頂点を結ぶ円とほぼ同一形状の嵌合孔が穿設され該嵌合孔で前記ロータリ軸に嵌合する基部を有する爪部材と、前記爪部材の基部を挟むように設けられた２つの円板からなるとともに前記各円板はその中心部に前記ロータリ軸の断面である正六角形とほぼ同一形状の装着孔が穿設され該装着孔で前記ロータリ軸に嵌合する回動部材とを備え、前記爪部材の基部には、前記ロータリ軸の軸心を中心とする円周に沿って円弧状の長孔が穿設されており、前記回動部材の２つの円板には、それぞれ前記爪部材の長孔に対向する部分に穴部が穿設されており、該穴部を貫通するとともに前記長孔に遊嵌する棒状の規制部材を備えていることを特徴とする。
【００１２】
さらに、前記爪部材及び前記回動部材を１単位として、複数の単位が所定の間隔を置いて前記ロータリ軸に嵌合されていることを特徴とする。
【００１３】
さらに、前記各単位の間には、所定の長さの筒体が前記ロータリ軸に嵌装されており、前記筒体の両端は、前記各単位の回動部材の円板に設けられた突起部で支持されていることを特徴とする。
【００１４】
さらに、前記各単位の爪部材の基部には、円弧状の前記長孔が複数穿設され各長孔は同一形状で所定角度ずつずれて形成されており、前記各単位の回動部材の２つの円板には、複数の前記長孔に対向する部分に前記穴部が所定角度ずつずれて複数穿設されており、前記規制部材は、前記各単位の爪部材の爪部が前記ロータリ軸の軸方向からみて所定角度ずつずれて配置されるように前記各単位の爪部材の前記長孔に遊嵌されていることを特徴とする。そして、前記規制部材は、前記ロータリ軸にほぼ平行に支持された直線状の複数の棒状部材からなり各棒状部材は前記各単位の爪部材の基部に設けられた前記長孔に遊嵌するとともに遊嵌された長孔に対応する前記各円板の前記穴部を貫通していることを特徴とする。
【００１５】
上記のような構成を有することで、爪部材はロータリ軸の断面である正六角形の頂点を結ぶ円とほぼ同一形状の嵌合孔を有するからロータリ軸に対して軸方向に移動自在で軸の回りを回動自在となり、回動部材を構成する２つの円板はロータリ軸の断面である正六角形とほぼ同一形状の装着孔を有するから軸方向のみ移動自在とすることができる。そして、爪部材に穿設された円弧状の長孔に爪部材を両側から挟む円板に穿設された穴部を貫通して棒状部材からなる規制部材を遊嵌しているので、爪部材はその長孔の長さだけロータリ軸の回りを回動自在になる。このように簡単な構造で確実に爪部材全体が所定角度だけ軸の回りを回動自在となるようにすることができる。
【００１６】
そして、爪部材及び回動部材を１単位としてその間に所定の長さの筒体を嵌装すれば、各単位を所定の間隔で配置することができ、筒体の長さを変更することで各単位の取付位置を簡単に変更することが可能となる。また、各爪部材の長孔とそれに対応する各円板の穴部を複数設け、ロータリ軸にほぼ平行に支持された直線状の棒状部材で各爪部材の長孔と対応する各円板の穴部を貫通することで、簡単な構造で各爪部材を位置決めできるとともにその爪部をロータリ軸の軸方向から見て所定の角度ずつずらせていくことが容易に設定可能となる。
【００１７】
本発明に係る正逆転ロータリ耕耘装置は、棒状の支持軸と、爪部と前記支持軸に嵌合する基部とを有する複数の爪部材と、複数の前記爪部材を連結し一体として動作させる連結部材と、前記支持軸の軸心を通る直線とほぼ一致する軸心を有するロータリ軸と、前記ロータリ軸に嵌合し前記ロータリ軸を中心に回動自在である作動部材と、前記作動部材を前記ロータリ軸の回動動作に追従して回動させるとともに前記作動部材が所定角度だけ前記ロータリ軸の回りを回動自在となるようにする規制手段とを備え、前記連結部材は前記作動部材に連結されており、前記ロータリ軸の回動により前記作動部材が回動することで前記連結部材を介して複数の前記爪部材が一体として回動することを特徴とする。
【００１８】
さらに、前記爪部材の基部には、前記支持軸の軸心を中心とする円周に沿って所定角度ずつずらして複数の位置決め穴部が穿設されており、前記連結部材は、前記支持軸にほぼ平行に支持された直線状の複数の棒状部材からなり、前記各棒状部材は前記各爪部材の基部に設けられた前記位置決め穴部を貫通していることを特徴とする。
【００１９】
さらに、前記連結部材の各棒状部材は、前記各爪部材の爪部が前記支持軸の軸方向からみて所定角度ずつずれて配置されるように前記各爪部材の基部の設けられた前記位置決め穴部に貫通していることを特徴とする。
【００２０】
さらに、前記作動部材には、前記ロータリ軸の軸心を中心とする円周に沿って円弧状の長孔が穿設されており、前記規制手段は、前記ロータリ軸の回動動作に追従して回動する回動部材と前記回動部材に突設され前記作動部材の長孔に遊嵌する規制部材とを備えていることを特徴とする。
【００２１】
さらに、複数の前記爪部材が所定の間隔を置いて前記支持軸に嵌合されていることを特徴とする。
【００２２】
さらに、複数の前記爪部材の間には、所定の長さの筒体が前記支持軸に嵌装されており、前記筒体の両端は、前記各爪部材の基部に設けられた突起部で支持されていることを特徴とする。
【００２３】
上記のような構成を有することで、支持軸に嵌合された複数の爪部材を連結部材で一体化してこれら全体が作動部材とともに所定角度だけロータリ軸の回りを回動自在なるようにすることができる。したがって、ダウンカット及びアップカットのいずれの場合にも耕土に爪部材の爪部が接地した際に爪部材全体が所定角度回動して耕土の切削動作に入るようになり、徐々に爪部材が耕土内に入っていくことでその抵抗を減少させることができる。また、爪部材は支持軸に対して軸方向に移動自在であることから、爪部材の数、その軸方向の取付位置を任意に設定できる。その際各爪部材の間に所定の長さの筒体を嵌装すれば、簡単かつ確実に爪部材を位置決めできる。そして、爪部材の基部に設けた複数の位置決め穴部を貫通して棒状部材を設けることで簡単な構造で一体化できるとともに、棒状部材に貫通する位置決め穴部をずらしていくことで、軸方向から見た各爪部材の爪部を所定角度ずつずらせて設定することが容易にできる。したがって、スクリューのように取り付けることで耕耘時の抵抗を減少することが可能となる。
【００２４】
本発明に係るロータリ耕耘装置用爪部材は、軸に装着される基部と、該基部とは別体の爪部と、前記基部に前記爪部を固定する固定部材とを備えたロータリ耕耘装置用爪部材であって、前記基部は、所定の間隔を置いて貫通して穿設された２つの基孔を有するとともに２つの基孔の間に当接部が形成されており、前記爪部は、所定の間隔を置いて貫通して穿設された２つの取付孔を有するとともに２つの取付孔の間に切欠部が形成されており、前記固定部材は、前記基孔及び前記取付孔に挿入して前記爪部を前記基部に固定する部材であり、前記爪部は、前記切欠部で前記当接部を跨ぐように前記基部に装着して前記固定部材により固定可能であることを特徴とする。
【００２５】
上記のような構成を有することで、爪部を基部の一方の面に固定する場合と爪部の切欠部で基部の当接部を跨ぐように装着して固定する場合とで爪部を設定することができる。すなわち、基部の一方の面が耕耘装置の進行方向に沿っているときに、爪部を跨いで固定する場合、進行方向に対して爪部は斜めに設定されることになり、外向きの斜めに設定されれば、爪部は耕耘しながら外方向に土を寄せ集め、内向きの斜めに設定されれば、爪部は耕耘しながら内方向に土を寄せ集めるようになり、爪部を適宜設定して様々な耕耘を行うことができ、さらにその設定を簡単に変更することができる。特に、爪部の根元から斜めになっているので、耕土の反転がよくなり、例えば溝掘り作業を効率よく行うことができるようになる。
【００２６】
【発明の実施の形態】
以下、本発明に係る耕耘爪取付装置及び正逆転ロータリ耕耘装置に関する実施形態について詳しく説明する。図１は、正逆転ロータリ装置全体の概略図である。図示しないトラクタに昇降可能に取り付けられた機体１には、中央部のギアボックス２と、それから横方向に延びる横フレーム３及び伝達軸フレーム４、横フレーム３から垂下して設けられた支持フレーム５、伝動軸フレーム４から垂下して設けられたチェーンフレーム７がそれぞれ取り付けられている。ギアボックス２内には、図示しないトラクタの駆動装置からの駆動力を伝達する傘歯車等の歯車機構１０が収納されており、伝達軸フレーム４内には、伝達軸１１が軸支されている。チェーンフレーム７内には、伝達軸１１の端部にスプロケット１２が固定されている。一方、支持フレーム５及びチェーンフレーム７の下部には両者の間に横架されたロータリ軸１５が軸支されており、チェーンフレーム７内にはロータリ軸１５に固定されたスプロケット１４が収納されている。そして、スプロケット１２及びスプロケット１４にはチェーン１３が懸架されている。ロータリ軸１５には、後述する複数の爪部材１６が嵌合されており、各爪部材１６の間には筒体１７が嵌装されて所定の間隔を保持するようになっている。
【００２７】
図示しないトラクタからの駆動力は、歯車機構１０で適宜正逆回転に切り換えられて伝達軸１１に伝達される。伝達軸１１の回転によりスプロケット１２が回転するとチェーン１３及びスプロケット１４を介してロータリ軸１５が回転する。ロータリ軸１５の回転により爪部材１６がロータリ軸１５の回りを回転し、耕土を切削していく。爪部材１６の上部にはカバー１８が爪部材１６全体を覆うように配設されており、耕耘時に石等が飛散するのを防止する。
【００２８】
図２は、耕耘爪取付装置の構造を分解斜視図で示したものである。ロータリ軸１５は断面形状が正六角形となるように成形されている。爪部材１６は、基部２０及び爪部２１からなる。図３には、爪部材１６の正面図と側面図が示されており、基部２０は、中央部にロータリ軸１５に嵌合する嵌合孔２３が穿設されており、嵌合孔２３は、ロータリ軸１５の断面形状である正六角形の頂点を結ぶ円周とほぼ一致する形状とされている。また、基部２０には、嵌合孔２３の周囲に３つの長孔２２が穿設されており、各長孔２２は、ロータリ軸１５の軸心を中心に所定の半径で描いた円周に沿って、所定の幅を有する円弧状となっている。そして、各長孔２２の形状は同一で、１２０度ずつずれて形成されている。爪部２１は、基部２０と一体化しており、基部２０の上部へ延出する板状で先端部は湾曲して耕耘時のすくい部を形成している。爪部２１の両側縁は刃部が形成されており、ダウンカット時及びアップカット時に刃部が耕土に接地して切削する。基部２０の爪部が一体化した部分以外の外形は、ロータリ軸１５の軸心を中心とする円形状に形成されている。
【００２９】
図２に示すように、爪部材１６の両側には回動部材２４がロータリ軸１５に嵌合しており、装着時には爪部材１６の基部２０に密着して装着される。図４に示すように、回動部材２４は、中央部にロータリ軸１５の断面形状である正六角形にほぼ一致する形状の装着孔２７が穿設されている。装着孔２７の周囲には３つの穴部２６が穿設されており、各穴部２６は、後述する長尺状の棒状部材２８が挿通可能な形状となっている。そして、装着時に各穴部２６は爪部材１６の各長孔２２に対向するように１２０度ずつずれて形成されている。回動部材２４の外周は、爪部材１６の基部２０の円形状とほぼ同一の円板状となっており、爪部材１６の基部２０との当接面は平面上となっているが、当接面と逆の面にはフランジ部２５が外周より小さい同心円状に形成されている。
【００３０】
ロータリ軸１５に装着する際には、爪部材１６の両側に回動部材２４が密着したグループを一単位として複数の単位を装着し、各単位の間には筒体１７が嵌装されて所定の間隔に保たれる。筒体１７は、その両端を回動部材２４のフランジ部２５に嵌め込むことで、保持されるようになっている。３本の長尺状の棒状部材２８が各単位の回動部材２４の穴部２６とそれに対応する爪部材１６の長孔２２を貫通している。各棒状部材２８は、ボルト状に形成されており、一方の端部に頭部が形成され、他方の端部にネジ溝が形成されている。一番外側に位置する回動部材２４の穴部２６を貫通して突出したネジ溝にナットを螺着して爪部材１６、回動部材２４及び筒体１７が密着して保持されるようにする。
【００３１】
以上のように装着された爪部材１６は、嵌合孔２３がロータリ軸１５の断面形状である正六角形の頂点を結ぶ円周とほぼ一致する形状であるから、ロータリ軸１５の回りを回動自在となっているが、基部２０の長孔２２に棒状部材２８が遊嵌されているため、図５に示すように、棒状部材２８に規制されて長孔２２の円弧状の長さだけ回動自在とされている。そして、回動部材２４の装着孔２７はロータリ軸１５の断面形状と同じ正六角形であることから、回動部材２４はロータリ軸１５に追従して回転し、回動部材２４の穴部２６で保持された棒状部材２８は回動部材２４とともに回転する。したがって、爪部材１６は長孔２２の端部に棒状部材２８が係合してロータリ軸１５の周りを回動するようになる。
爪部材１６は、ロータリ軸１５の回りを回動して耕土に接地すると、上述したように長孔２２の円弧状の長さ分だけ回動自在であるため、耕土に押圧されて一旦逆方向に回動してから、長孔２２の端部に棒状部材２８が係合してロータリ軸１５の回動力が伝達されて耕土を切削するようになる。ダウンカット時及びアップカット時のいずれの場合にも同様の動作がなされるため、いずれの場合にも耕土に爪部材１６の爪部２１が押入する際の抵抗を減少することができるとともに、爪部２１の先端部に負荷が集中することもない。
【００３２】
各単位の爪部材１６の爪部２１は、各棒状部材２８に遊嵌する長孔２２をずらすことで、図６に示すように、ロータリ軸１５の軸方向から見て１２０度ずつずらして装着することができる。全体からみると、爪部２１がスクリュー状に配列されるようになり、この装着状態でロータリ軸１５を回動すると、各爪部２１が順次耕土に押入されるので、爪部２１の押入時の抵抗が減少して小さい馬力で効率よく耕耘作業を行うことができる。
【００３３】
上記の例では、３つの爪部２１を１２０度ずつずらせた３連スクリュータイプを説明したが、爪部材をスクリュー状にずらす角度を小さくしていくと爪部材の回動自在となる角度が小さくなる。そこで、爪部材の回動自在となる角度をそのまま維持してスクリュー状にずらす角度を小さくすることができる例を説明する。
【００３４】
図７には、６連スクリューの場合の分解斜視図を示している。爪部材１６、支持円板３３及び筒体１７は正六角形の断面形状を有する支持軸２９に嵌合されている。支持軸２９は筒状に形成され、ロータリ軸１５の端部には円柱状の差込部３０が延設されており、支持軸２９の一方の端部に差込部３０を挿入することで支持軸２９はロータリ軸１５により回動自在に軸支される。爪部材１６の基部２０には、中央部に支持軸２９の断面形状とほぼ同一の正六角形の嵌合孔３１が穿設されており、その周囲には支持軸２９の軸心を中心とする円周に沿って６０度ずつずらせて６つの位置決め穴部３２が穿設されている。支持円板３３には、支持軸２９の断面形状とほぼ同一の正六角形の貫通孔３５が穿設され、その周囲には上述した位置決め穴部３２と同じ円周上の位置に１２０度ずつずらせて穴部３４が穿設されている。支持円板３３の外周は、爪部材１６の基部２０の円形状とほぼ同一の円板状となっており、爪部材１６の基部２０との当接面は平面上となっているが、当接面と逆の面にはフランジ部３６が外周より小さい同心円状に形成されている。
【００３５】
支持円板３３は爪部材１６の基部２０に両側から密着するように装着され、支持円板３３の３つの穴部３４は、基部２０の６つの位置決め穴部３２のうち１つおきに選択される３つの位置決め穴部３２と一致するように装着される。そして、１つの爪部材１６及び２つの支持円板３３を１単位として複数単位を支持軸２９に嵌合する。各単位の爪部材１６の爪部２１を支持軸２９に対して６０度ずつずらして嵌合すれば、図８に示すように支持軸２９の軸方向から見てスクリュー状に装着することができる。そして、各単位の間に筒体１７を嵌装し、筒体１７の両端を支持円板３３のフランジ部３６に嵌合して所定間隔を保つようにする。
【００３６】
各単位の支持円板３３の３つの穴部３４及びこれらに一致する爪部材１６の基部２０の位置決め穴部３２には長尺状の３つの支持棒４８が挿通されて支持軸２９とほぼ平行に支持されている。各支持棒４８の一方の端部はボルトの頭部状に形成され、他方の端部はネジ溝が形成されている。支持軸２９のロータリ軸１５側の端部には、一番外側にカバー部材４５が支持軸２９に嵌合されている。カバー部材４５は、円形状で後述する作動部材３７を覆うためのものである。そして、その中央部には支持軸２９の断面形状とほぼ一致する正六角形の貫通孔４７が穿設されており、貫通孔４７の周囲には上述した３つの支持棒４８が貫通する３つの穴部４６が穿設されている。
【００３７】
一方ロータリ軸１５は断面形状を正六角形に成形されており、端部には上述のように差込部３０が形成されて支持軸２９が軸支されている。そして、円板状の作動部材３７及び回動部材４１がロータリ軸１５に嵌合されている。作動部材３７は、中央部にロータリ軸１５に嵌合する嵌合孔３９が穿設されており、嵌合孔３９は、ロータリ軸１５の断面形状である正六角形の頂点を結ぶ円周とほぼ一致する形状とされている。したがって、作動部材３７は、ロータリ軸１５の回りに回動自在となっている。また、嵌合孔３９の周囲に３つの長孔３８が穿設されており、各長孔３８は、ロータリ軸１５の軸心を中心に所定の半径で描いた円周に沿って、所定の幅を有する円弧状となっている。そして、各長孔２２の形状は同一で、１２０度ずつずれて形成されている。各長孔３８と嵌合孔３９との間には上記の３つの支持棒４８の端部に形成されたネジ溝がそれぞれ螺着して固定するための３つのネジ穴４０が穿設されている。
【００３８】
回動部材４１は、作動部材３７を中心にカバー部材４５とは反対側に装着され、カバー部材４５と同様に円形状に成形されており、カバー部材４５の周囲に突設したフランジ部と密着して作動部材３７を被覆する。回動部材４１の中央部には、ロータリ軸１５の断面形状である正六角形とほぼ同一の形状の装着孔４３が穿設されており、装着孔４３の周囲には３つの穴部４２が作動部材３７に形成された３つの長孔３８に対応して１２０度ずつずれて穿設されている。３つの穴部４２には棒状部材４４が挿通して長孔３８に遊嵌しており、棒状部材４４の端部には長孔３８からの抜け止めのためナット等が止着されている。作動部材３７は、長孔３８に棒状部材４４が遊嵌されているため、長孔の円弧状の長さ分だけロータリ軸１５の回りを回動自在となっている。
【００３９】
図９には、ロータリ軸１５及び支持軸２９の接合部分付近の分解正面図を示している。支持軸２９は、ロータリ軸１５の差込部３０が挿入されて軸支される。支持軸２９に支持円板３３、爪部材１６、支持円板３３、筒体１７、カバー部材４５が順番に嵌合されており、支持棒４８により貫通されて連結されている。ロータリ軸１５には作動部材３７及び回動部材４１が嵌合されており、両者は棒状部材４４で連結されている。
【００４０】
以上の構成でロータリ軸１５が回動すると、回動部材４１は正六角形の装着孔４３でロータリ軸１５に嵌合しているため、ロータリ軸１５に追従して回動する。回動部材４２が回動すると、穴部４２に挿通された棒状部材４４が追従して回動するが、作動部材３７の長孔３８に棒状部材４４が遊嵌されているため、長孔３８の一端に棒状部材４４が係止したときに作動部材３７が追従して回動するようになる。作動部材３７には３つの支持棒４８の一端が固定されているため、支持棒４８が貫通して連結されたカバー部材４５、支持円板３３、爪部材１６及び筒体１７が一体として作動部材３７に追従して回動するようになる。したがって、ロータリ軸１５が回動して爪部材１６が耕土に接地すると、耕土から抵抗を受けて一旦ロータリ軸１５とは逆方向に回動するが、作動部材３７が長孔３８で棒状部材４４で規制されるとロータリ軸１５に追従して回動し、爪部材１６は耕土に押入されて耕土を切削するようになる。したがって、爪部材１６の押入時の抵抗を減少することができ、また６つの爪部材１６をスクリュー状に配列できるので、よりバランスよく耕耘することが可能となる。
【００４１】
上記実施例においては、爪部材１６は基部２０及び爪部２１が一体となったもので説明したが、基部２０及び爪部２１を別体とすることも可能である。図１０に示すように、基部２０には、図３と同様に長孔２２と嵌合孔２３が穿設されており、上部に当接部５０と２つの基孔５２が穿設されている。爪部２１には、下部に２つの基孔５２に対応して２つの取付孔５３が穿設されており、取付孔５３の間には切欠部５１が形成されている。図１１に示すように、基部２０の一方の面に爪部２１の下部を密着させて基孔５２及び取付孔５３を一致させ固定部材５４で固定する。固定部材５４としては、ボルト及びナットを用いることができるが、固定することが可能であればよく、特に限定されない。
【００４２】
また、図１２に示すように、切欠部５１で当接部５０に跨ぐように基部２０に爪部２１を装着して固定部材５４で固定すれば、基部２０に対して爪部２１を斜めにして取り付けることができる。こうして爪部２１が斜めに取り付けられると、爪部２１が回動したときに、耕土を進行方向に対して一方のサイドに寄せ集めることができる。従来の爪部材でもこうした効果をねらって捻るように湾曲した形状に形成することが行われているが、成形が難しくまた根元から捻ることができなかった。本発明の爪部材は、簡単に加工でき、さらに根元から斜めに取り付けられるので、耕耘作業性も向上する。また、固定部材を取り外すだけで爪部の装着方向を簡単に変えることができるので、爪部の取付作業を簡単に短時間で行うことが可能となる。
【００４３】
また、図１３には、図７に示す爪部材１６について基部２０及び爪部２１を別体とした場合の基部２０を示している。図１０と同様に基孔５２に爪部２１を取り付けて爪部材１６を構成することができる。また、図１４及び図１５は、基部２０の上下に当接部５１及び基孔５２を設けた例である。図１６に示すように、上下に２つの爪部２１を固定部材５４で固定すれば、爪部の数を２倍に増やすことができる。また、図１２と同様に爪部２１を適宜斜めに取り付けるようにすることもでき、種々の耕耘作業に対して簡単に対応することが可能となる。
【００４４】
【発明の効果】
以上に説明したとおり、本発明に係る耕耘爪取付装置は、爪部材はロータリ軸の断面である正六角形の頂点を結ぶ円とほぼ同一形状の嵌合孔を有するからロータリ軸に対して軸方向に移動自在で軸の回りを回動自在となり、回動部材を構成する２つの円板はロータリ軸の断面である正六角形とほぼ同一形状の装着孔を有するから軸方向のみ移動自在とすることができる。そして、爪部材に穿設された円弧状の長孔に爪部材を両側から挟む円板に穿設された穴部を貫通して棒状部材からなる規制部材を遊嵌しているので、爪部材はその長孔の長さだけロータリ軸に対して回動自在になる。このように簡単な構造で確実に爪部材全体を所定角度だけ軸の回りを回動自在をすることができる。
【００４５】
本発明に係る正逆転ロータリ耕耘装置は、爪部材及び回動部材を１単位としてその間に所定の長さの筒体を嵌装すれば、各単位を所定の間隔で配置することができ、筒体の長さを変更することで各単位の取付位置を簡単に変更することが可能となる。また、各爪部材の長孔とそれに対応する各円板の穴部を複数設け、ロータリ軸にほぼ平行に支持された直線状の棒状部材で各爪部材の長孔と対応する各円板の穴部を貫通することで、簡単な構造で各爪部材を位置決めできるとともにその爪部をロータリ軸の軸方向から見て所定の角度ずつずらせていくことが容易に設定可能となる。
【００４６】
本発明に係る正逆転ロータリ耕耘装置は、支持軸に嵌合された複数の爪部材を連結部材で一体化してこれら全体を作動部材とともに所定角度だけロータリ軸に対して相対的に回動自在とすることができる。したがって、ダウンカット及びアップカットのいずれの場合にも耕土に爪部材の爪部が接地した際に爪部材全体が所定角度回動して耕土の切削動作に入るようになり、徐々に爪部材が耕土内に入っていくことでその抵抗を減少させることができる。また、爪部材は支持軸に対して軸方向に移動自在であることから、爪部材の数、その軸方向の取付位置を任意に設定できる。その際各爪部材の間に所定の長さの筒体を嵌装すれば、簡単かつ確実に爪部材を位置決めできる。そして、爪部材の基部に設けた複数の位置決め穴部を貫通して棒状部材を設けることで簡単な構造で一体化できるとともに、棒状部材に貫通する位置決め穴部をずらしていくことで、軸方向から見た各爪部材の爪部を所定角度ずつずらせて設定することが容易にできる。したがって、スクリューのように取り付けることで耕耘時の抵抗を減少することが可能となる。
【００４７】
本発明に係るロータリ耕耘装置用爪部材は、爪部を基部の一方の面に固定する場合と爪部の切欠部で基部の当接部を跨ぐように装着して固定する場合とで爪部を設定することができる。すなわち、基部の一方の面が耕耘装置の進行方向に沿っているときに、爪部を跨いで固定する場合、進行方向に対して爪部は斜めに設定されることになり、外向きの斜めに設定されれば、爪部は耕耘しながら外方向に土を寄せ集め、内向きの斜めに設定されれば、爪部は耕耘しながら内方向に土を寄せ集めるようになり、爪部を適宜設定して様々な耕耘を行うことができ、さらにその設定を簡単に変更することができる。特に、爪部の根元から斜めになっているので、耕土の反転がよくなり、例えば溝掘り作業を効率よく行うことができるようになる。
【図面の簡単な説明】
【図１】本発明に係る実施形態の正逆転ロータリ耕耘装置の概略図である。
【図２】本発明に係る実施形態の正逆転ロータリ耕耘装置の分解斜視図である。
【図３】本発明に係る実施形態の爪部材の正面図及び側面図である。
【図４】本発明に係る実施形態の回動部材の正面図及び側面図である。
【図５】本発明に係る実施形態の爪部材のロータリ軸の軸方向から見た動作図である。
【図６】本発明に係る実施形態の複数の爪部材のロータリ軸の軸方向から見た図である。
【図７】本発明に係る実施形態の正逆転ロータリ耕耘装置の分解斜視図である。
【図８】本発明に係る実施形態の複数の爪部材のロータリ軸の軸方向から見た図である。
【図９】本発明に係る実施形態の正逆転ロータリ耕耘装置の分解正面図である。
【図１０】本発明に係る実施形態の爪部材の分解図である。
【図１１】本発明に係る実施形態の爪部材の組立図である。
【図１２】本発明に係る実施形態の爪部材の組立図である。
【図１３】本発明に係る実施形態の爪部材の基部の正面図である。
【図１４】本発明に係る実施形態の爪部材の基部の正面図である。
【図１５】本発明に係る実施形態の爪部材の基部の正面図である。
【図１６】本発明に係る実施形態の爪部材の組立図である。
【符号の説明】
１　　機体
２　　ギアボックス
３　　横フレーム
４　　伝達軸フレーム
５　　支持フレーム
７　　チェーンフレーム
１０　　歯車機構
１１　　伝達軸
１２　　スプロケット
１３　　チェーン
１４　　スプロケット
１５　　ロータリ軸
１６　　爪部材
１７　　筒体
１８　　カバー
２０　　基部
２１　　爪部
２２　　長孔
２３　　嵌合孔
２４　　回動部材
２５　　フランジ部
２６　　穴部
２７　　装着孔
２８　　棒状部材
２９　　支持軸
３０　　差込部
３１　　嵌合孔
３２　　位置決め穴部
３３　　支持円板
３４　　穴部
３５　　貫通孔
３６　　ブランジ部
３７　　作動部材
３８　　長孔
３９　　嵌合孔
４０　　ネジ穴
４１　　回動部材
４２　　穴部
４３　　装着孔
４４　　棒状部材
４５　　カバー部材
４６　　穴部
４７　　貫通孔
４８　　支持棒
５０　　当接部
５１　　切欠部
５２　　基孔
５３　　取付孔
５４　　固定部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a tilling claw mounting device for mounting a tilling claw on a shaft, and appropriately switches between a down-cut rotary in which the tilling claw is rotated downward with respect to the cultivated soil and an up-cut rotary in which the tillable claw is rotationally cut upward. It relates to a possible forward / reverse rotary tillage device.
[0002]
[Prior art]
In a forward / reverse rotary tilling device, it is necessary to reduce the resistance when cutting by cutting the tilling claw in order from the root side at the time of down cutting, and to reverse the direction of travel of the device at the time of up cutting. It is necessary to take countermeasures because the tilling nails rotate in the cultivated soil and receive greater resistance than when downcutting.
[0003]
If you use a tilling nail that curves backward from the root for the down cut, you cannot use the tilling nail as it is with the up cut, so you need to replace the tilling nail. And swinging in the rotation direction. For example, in Japanese Patent Publication No. Hei 6-75441, a claw mounting flange extending in a direction perpendicular to the rotary shaft is fixedly provided, and a work claw having blade edges formed on both side edges by a pivot pin is pivotally attached to a tip end thereof. Points are listed. The working claw is regulated to be swingable by a predetermined angle by a stopper provided on the claw mounting flange. Japanese Patent Publication No. 6-12961 discloses that a bracket is fixed in a direction substantially perpendicular to a claw axis, a tilling claw is attached to the bracket, and the pivot can be pivoted about a pivot, and Down cutting blades and up cutting blades are formed on both side edges of the tilling claw, respectively, so as to reduce the resistance during cutting.
[0004]
Further, in Japanese Patent No. 3264730, a holder is fixed to a tilling shaft, a mounting base of a tilling claw is inserted into the holder, a pin is inserted into the mounting base and the holder to prevent it from coming off, and the holder is mounted in the holder. It is described that a holding spring for pressing a base is attached to suppress rattling of a tilling nail.
[0005]
[Problems to be solved by the invention]
In the above-described conventional technologies, the tilling claws are mounted on the flange or the bracket fixed to the rotary shaft, so that the mounting position is fixed. Therefore, it is difficult to make settings according to the situation of cultivated soil. Moreover, since the attachment of the tilling nail to the flange and the bracket is pivotally supported by the pin, it is inevitable that rattling occurs during use. As described in Japanese Patent No. 3264730, it is conceivable to use a pressing spring, but the structure becomes complicated, and if the device is used for a long period of time, some rattling will occur.
[0006]
Therefore, in the present invention, there is provided a tilling claw mounting device and a forward / reverse rotary tilling device capable of reducing the resistance at the time of cutting in down cut and up cut with a simple structure and performing efficient tilling work. It is the purpose.
[0007]
[Means for Solving the Problems]
The tilling claw attachment device according to the present invention includes a claw member having a claw portion and a base portion fitted to a rod-shaped shaft, the claw member being movable in the axial direction of the shaft, and being rotatable around the shaft, A regulating means is provided for rotating the claw member following the rotation of the shaft and for allowing the claw member to be rotatable around the shaft by a predetermined angle. Further, an arc-shaped long hole is formed in the base of the claw member along a circumference centered on the axis of the shaft, and the restricting means is fitted to the shaft, and A rotating member that is movable only in the axial direction and that rotates in accordance with the rotating operation of the shaft; and a regulating member protruding from the rotating member and loosely fitting into the elongated hole of the claw member. The claw member is rotatable around the axis by a predetermined angle defined by both ends of the elongated hole by the regulating member.
[0008]
And the forward / reverse rotary tillage device according to the present invention is characterized in that a plurality of claw members attached by the above-described tillage claw attachment device are fitted to a rotary shaft at predetermined intervals. Further, the claw portions of each claw member are arranged so as to be shifted by a predetermined angle when viewed from the axial direction of the rotary shaft.
[0009]
The tilling claw attachment device according to the present invention has the above-described configuration, so that the base itself of the claw member rotates around an axis. When the claw portion of the claw member comes into contact with the ground, the entire claw member rotates by a predetermined angle to start cutting operation of cultivated soil, and the resistance is gradually reduced by gradually moving the claw member into the cultivated soil. Can be. In addition, since the entire claw member rotates, it is easy to ground the entire side edge of the claw portion, so that the load applied to the claw member can be prevented from being concentrated on a part. Furthermore, since the base of the claw member is fitted on the shaft, there is no wobble that occurs when pivoting with a pin as in the prior art. Since the claw member is movable in the axial direction, the mounting position of the claw member in the axial direction can be arbitrarily set, and the claw member may be appropriately mounted in the axial direction according to the number of claw members to be mounted. Further, since the claw member is also rotatable, the mounting position in the rotation direction of the claw member can be arbitrarily set, and the claw member can be easily mounted like a screw by being shifted by a predetermined angle when viewed from the axial direction. . With such a tilling claw mounting device, a forward / reverse rotary tilling device in which a plurality of claw members are mounted on a rotary shaft, the number of claw members to be mounted can be selected, the mounting position can be appropriately set, and a claw member like a screw can be set. By shifting the installation, it is possible to perform the most suitable tilling work according to the situation of the cultivated soil. In particular, by attaching a claw member like a screw, vibration during the tilling operation is reduced, the horsepower of the driving device can be reduced, and the reversal of the tilled soil can be performed in a well-balanced manner as a whole.
[0010]
A circular arc-shaped long hole is formed in the base of the claw member, and the rotation member and the restriction member as described above are used as the restriction means. And can be rotated. In addition, since each member can be mounted simply by fitting the member to the shaft, the mounting operation can be simplified.
[0011]
Further, the forward / reverse rotary tillage device according to the present invention is provided with a rotary shaft having a regular hexagonal cross-sectional shape, and a fitting hole having substantially the same shape as a circle connecting a vertex of the regular hexagonal cross-section of the rotary shaft. A claw member having a base fitted to the rotary shaft through the fitting hole; and two disks provided so as to sandwich the base of the claw member, wherein each of the disks has the rotary shaft at its center. A mounting hole having substantially the same shape as a regular hexagon which is a cross section of the rotary shaft is provided, and a rotating member is fitted to the rotary shaft through the mounting hole.The base of the claw member is provided with an axial center of the rotary shaft. An arc-shaped long hole is formed along the circumference of the center, and holes are formed in the two discs of the rotating member at portions opposed to the long holes of the claw members, respectively. And a rod-shaped restriction that penetrates the hole and fits loosely into the elongated hole. Characterized in that it comprises a timber.
[0012]
Further, a plurality of units are fitted to the rotary shaft at predetermined intervals with the claw member and the rotating member as one unit.
[0013]
Further, a cylindrical body of a predetermined length is fitted on the rotary shaft between each of the units, and both ends of the cylindrical body are provided with protrusions provided on a disk of a rotating member of each of the units. It is characterized by being supported by a part.
[0014]
Further, a plurality of the arc-shaped long holes are formed at the base of the claw member of each unit, and the long holes are formed in the same shape and shifted by a predetermined angle. In one of the discs, a plurality of the hole portions are formed at positions opposed to the plurality of the long holes by being shifted by a predetermined angle, and the regulating member includes a claw portion of each claw member of the rotary shaft. The claw member of each unit is loosely fitted in the elongated hole so as to be displaced by a predetermined angle when viewed from the axial direction. The regulating member is composed of a plurality of linear rods supported substantially in parallel with the rotary shaft, and each rod is loosely fitted into the long hole provided at the base of the claw member of each unit. It is characterized in that it penetrates through the hole of each of the discs corresponding to the loosely fitted long holes.
[0015]
With the above configuration, the claw member has a fitting hole having substantially the same shape as a circle connecting the vertices of a regular hexagon, which is a cross section of the rotary shaft, so that the claw member is freely movable in the axial direction with respect to the rotary shaft. The two disks constituting the rotating member have a mounting hole having substantially the same shape as a regular hexagon which is a cross section of the rotary shaft, so that they can be moved only in the axial direction. Then, the regulating member formed of a rod-shaped member is loosely fitted in the arc-shaped long hole formed in the claw member and penetrates the hole formed in the disk sandwiching the claw member from both sides. Is rotatable around the rotary shaft by the length of the slot. With such a simple structure, the entire claw member can be surely rotatable around the axis by a predetermined angle.
[0016]
If the claw member and the rotating member are defined as one unit and a cylindrical body having a predetermined length is fitted therebetween, each unit can be arranged at a predetermined interval, and by changing the length of the cylindrical body. The mounting position of each unit can be easily changed. In addition, a plurality of elongated holes of each claw member and a plurality of holes of each disk corresponding thereto are provided, and a linear rod-like member supported substantially parallel to the rotary shaft is provided with a hole of each disk corresponding to the elongated hole of each claw member. By penetrating the hole, each claw member can be positioned with a simple structure, and the claw can be easily set to be shifted by a predetermined angle when viewed from the axial direction of the rotary shaft.
[0017]
A forward / reverse rotary tillage device according to the present invention includes a plurality of claw members having a rod-shaped support shaft, a claw portion, and a base fitted to the support shaft, and a plurality of the claw members connected to each other to operate integrally. A member, a rotary shaft having an axis substantially coincident with a straight line passing through the axis of the support shaft, an operating member fitted to the rotary shaft and rotatable around the rotary shaft, and the operating member. Regulating means for rotating the rotary member following the rotating operation of the rotary shaft and allowing the operating member to be rotatable around the rotary shaft by a predetermined angle, wherein the connecting member is provided on the operating member. The plurality of claw members are integrally connected via the connecting member when the operating member is rotated by the rotation of the rotary shaft.
[0018]
Further, a plurality of positioning holes are formed in the base of the claw member at predetermined angles along a circumference centered on the axis of the support shaft, and the connecting member is provided with the support shaft. And a plurality of linear rod-like members supported substantially in parallel with each other, wherein each of said rod-like members penetrates through the positioning hole provided at the base of each of said claw members.
[0019]
Further, each of the rod-shaped members of the connecting member is provided with a positioning hole provided at a base of each of the claw members such that the claw portions of each of the claw members are displaced by a predetermined angle when viewed from the axial direction of the support shaft. Characterized in that it penetrates the part.
[0020]
Further, the operating member is formed with an arc-shaped long hole along a circumference centered on the axis of the rotary shaft, and the regulating means follows the turning operation of the rotary shaft. And a regulating member projecting from the rotating member and loosely fitting into a long hole of the operating member.
[0021]
Further, a plurality of the claw members are fitted to the support shaft at predetermined intervals.
[0022]
Furthermore, between the plurality of claw members, a cylindrical body of a predetermined length is fitted on the support shaft, and both ends of the cylindrical body are projections provided at the base of each of the claw members. It is characterized by being supported.
[0023]
With the above configuration, the plurality of claw members fitted to the support shaft are integrated with the connecting member so that the whole of them can rotate around the rotary shaft by a predetermined angle together with the operating member. Can be. Therefore, in both cases of the down cut and the up cut, when the claw portion of the claw member comes into contact with the cultivated soil, the entire claw member rotates by a predetermined angle and starts cutting operation of the cultivated soil. By going into the arable soil, its resistance can be reduced. Further, since the claw members are movable in the axial direction with respect to the support shaft, the number of the claw members and the mounting position in the axial direction can be arbitrarily set. At this time, if a cylindrical body having a predetermined length is fitted between the claw members, the claw members can be positioned easily and reliably. And, by providing a rod-shaped member through a plurality of positioning holes provided in the base of the claw member, the rod-shaped member can be integrated with a simple structure, and the positioning holes penetrating through the rod-shaped member can be shifted in the axial direction. Can be easily set by shifting the claw portions of each claw member viewed from above by a predetermined angle. Therefore, it becomes possible to reduce the resistance at the time of tilling by attaching like a screw.
[0024]
A claw member for a rotary tillage device according to the present invention is for a rotary tillage device including a base mounted on a shaft, a claw portion separate from the base portion, and a fixing member for fixing the claw portion to the base portion. A claw member, wherein the base has two base holes penetrating therethrough at a predetermined interval, and a contact portion is formed between the two base holes; And two notches formed through the holes at predetermined intervals, and a notch is formed between the two holes. The fixing member is inserted into the base hole and the holes. And a member for fixing the claw portion to the base portion, wherein the claw portion is attached to the base portion so as to straddle the contact portion with the cutout portion and can be fixed by the fixing member. I do.
[0025]
By having the above configuration, the claw portion is set in a case where the claw portion is fixed to one surface of the base portion and a case where the claw portion is attached and fixed so as to straddle the contact portion of the base portion with the cutout portion of the claw portion. can do. In other words, when one surface of the base is along the traveling direction of the tilling device and the struts are fixed across the claws, the claws will be set obliquely with respect to the traveling direction, and the obliquely outward direction will be set. If it is set to, the claws gather the soil outward while tilling, and if it is set inward and diagonally, the claws will gather the soil inward while tilling, Various tillage can be performed by appropriately setting, and the setting can be easily changed. In particular, since the claw portion is inclined from the root, the cultivated soil is more easily inverted, and, for example, a trenching operation can be performed efficiently.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a tilling claw mounting device and a forward / reverse rotary tilling device according to the present invention will be described in detail. FIG. 1 is a schematic view of the entire forward / reverse rotation rotary device. A body 1 mounted on a tractor (not shown) so as to be able to move up and down is provided with a gearbox 2 at a central portion, a horizontal frame 3 and a transmission shaft frame 4 extending laterally therefrom, and a support frame 5 provided to be suspended from the horizontal frame 3. And a chain frame 7 provided to be suspended from the transmission shaft frame 4. A gear mechanism 10 such as a bevel gear for transmitting a driving force from a tractor driving device (not shown) is housed in the gear box 2, and a transmission shaft 11 is supported in the transmission shaft frame 4. . A sprocket 12 is fixed to an end of the transmission shaft 11 in the chain frame 7. On the other hand, a rotary shaft 15 laid horizontally between the support frame 5 and the chain frame 7 is rotatably supported between them, and a sprocket 14 fixed to the rotary shaft 15 is housed in the chain frame 7. I have. A chain 13 is suspended between the sprocket 12 and the sprocket 14. A plurality of claw members 16, which will be described later, are fitted to the rotary shaft 15, and a cylindrical body 17 is fitted between the claw members 16 so as to maintain a predetermined interval.
[0027]
The driving force from the tractor (not shown) is transmitted to the transmission shaft 11 by being appropriately switched between forward and reverse rotation by the gear mechanism 10. When the sprocket 12 is rotated by the rotation of the transmission shaft 11, the rotary shaft 15 is rotated via the chain 13 and the sprocket 14. The rotation of the rotary shaft 15 causes the claw member 16 to rotate around the rotary shaft 15 to cut the cultivated soil. A cover 18 is provided on the upper portion of the claw member 16 so as to cover the entire claw member 16 to prevent stones and the like from scattering during tilling.
[0028]
FIG. 2 is an exploded perspective view showing the structure of the tilling claw attachment device. The rotary shaft 15 is formed so that the cross-sectional shape becomes a regular hexagon. The claw member 16 includes a base 20 and a claw 21. FIG. 3 shows a front view and a side view of the claw member 16. A fitting hole 23 for fitting the rotary shaft 15 is formed in the center of the base 20. , And a shape substantially matching the circumference connecting the vertices of the regular hexagon which is the cross-sectional shape of the rotary shaft 15. The base 20 has three long holes 22 formed around a fitting hole 23. Each long hole 22 has a circumference drawn with a predetermined radius around the axis of the rotary shaft 15. Along the arc, it has an arc shape having a predetermined width. The shapes of the long holes 22 are the same, and are formed by being shifted by 120 degrees. The claw portion 21 is integrated with the base portion 20 and has a plate shape extending to an upper portion of the base portion 20, and a tip portion is curved to form a rake portion during tilling. Blade portions are formed on both side edges of the claw portion 21, and the blade portions are grounded on cultivated soil and cut during downcut and upcut. The outer shape of the base portion 20 other than the portion where the claw portions are integrated is formed in a circular shape centered on the axis of the rotary shaft 15.
[0029]
As shown in FIG. 2, rotating members 24 are fitted on the rotary shaft 15 on both sides of the claw member 16, and are attached in close contact with the base 20 of the claw member 16 at the time of mounting. As shown in FIG. 4, the rotation member 24 has a mounting hole 27 having a shape substantially coinciding with a regular hexagon, which is a cross-sectional shape of the rotary shaft 15, in the center. Three holes 26 are formed around the mounting hole 27, and each of the holes 26 has a shape through which a long rod-like member 28 described later can be inserted. Each of the holes 26 is formed so as to be opposed to each of the long holes 22 of the claw member 16 by 120 degrees at the time of mounting. The outer periphery of the rotating member 24 has a disk shape substantially the same as the circular shape of the base 20 of the claw member 16, and the contact surface of the claw member 16 with the base 20 is flat. On the surface opposite to the contact surface, a flange portion 25 is formed concentrically smaller than the outer periphery.
[0030]
When mounted on the rotary shaft 15, a plurality of units are mounted with a group in which the rotating member 24 is in close contact with both sides of the claw member 16 as one unit, and a cylindrical body 17 is fitted between each unit and a predetermined unit is mounted. Is maintained at intervals. The cylindrical body 17 is held by fitting both ends thereof into the flange 25 of the rotating member 24. Three long rod-like members 28 penetrate through the holes 26 of the rotation member 24 of each unit and the corresponding long holes 22 of the claw member 16. Each rod-shaped member 28 is formed in a bolt shape, and has a head at one end and a thread groove at the other end. A nut is screwed into a screw groove protruding through the hole 26 of the outermost rotating member 24 so that the claw member 16, the rotating member 24 and the cylinder 17 are held in close contact with each other. I do.
[0031]
The claw member 16 mounted as described above has a shape in which the fitting hole 23 substantially matches the circumference connecting the vertices of the regular hexagon which is the cross-sectional shape of the rotary shaft 15, and thus rotates around the rotary shaft 15. Since the rod-shaped member 28 is loosely fitted in the long hole 22 of the base 20, as shown in FIG. 5, the rod-shaped member 28 is restricted by the rod-shaped member 28 and rotates by the arc-shaped length of the long hole 22. It is free to move. Since the mounting hole 27 of the rotating member 24 has the same regular hexagon as the cross-sectional shape of the rotary shaft 15, the rotating member 24 rotates following the rotary shaft 15 and rotates at the hole 26 of the rotating member 24. The held bar-shaped member 28 rotates together with the rotating member 24. Therefore, the claw member 16 rotates around the rotary shaft 15 with the rod-shaped member 28 engaged with the end of the elongated hole 22.
When the claw member 16 rotates around the rotary shaft 15 and touches the cultivated soil, the claw member 16 is rotatable by the arc-shaped length of the long hole 22 as described above. Then, the rod-shaped member 28 is engaged with the end of the long hole 22 and the rotating power of the rotary shaft 15 is transmitted to cut the cultivated soil. Since the same operation is performed in both the case of the downcut and the case of the upcut, the resistance when the claw portion 21 of the claw member 16 is pressed into the cultivated soil can be reduced in any case, and the claw can be reduced. The load does not concentrate on the tip of the part 21.
[0032]
The claw portions 21 of the claw members 16 of the respective units are attached by being shifted by 120 degrees as viewed from the axial direction of the rotary shaft 15 by shifting the long holes 22 loosely fitted into the respective rod-shaped members 28 as shown in FIG. can do. When viewed from the whole, the claw portions 21 are arranged in a screw shape. When the rotary shaft 15 is rotated in this mounted state, each claw portion 21 is sequentially pushed into the cultivated soil. And the tilling work can be performed efficiently with small horsepower.
[0033]
In the above example, the triple screw type in which the three claw portions 21 are shifted by 120 degrees has been described. However, as the angle at which the claw member is shifted in a screw shape is reduced, the angle at which the claw member can freely rotate becomes smaller. Become. Therefore, an example will be described in which the angle at which the claw member is rotatable can be maintained as it is and the angle at which the claw member is shifted in a screw shape can be reduced.
[0034]
FIG. 7 shows an exploded perspective view in the case of a six-unit screw. The claw member 16, the support disk 33, and the cylinder 17 are fitted on a support shaft 29 having a regular hexagonal cross-sectional shape. The support shaft 29 is formed in a cylindrical shape, and a cylindrical insertion portion 30 is extended at an end of the rotary shaft 15. The insertion portion 30 is inserted into one end of the support shaft 29. The support shaft 29 is rotatably supported by the rotary shaft 15. At the center of the base 20 of the claw member 16, a regular hexagonal fitting hole 31 having substantially the same cross-sectional shape as the support shaft 29 is formed. Six positioning holes 32 are formed by being shifted by 60 degrees along the circumference. A regular hexagonal through-hole 35 having substantially the same cross-sectional shape as the support shaft 29 is formed in the support disk 33, and the through-hole 35 is displaced around the same circumference as the above-described positioning hole 32 by 120 degrees. A hole 34 is formed. The outer periphery of the support disk 33 has a disk shape substantially the same as the circular shape of the base 20 of the claw member 16, and the contact surface of the claw member 16 with the base 20 is flat. On the surface opposite to the contact surface, a flange portion 36 is formed concentrically smaller than the outer periphery.
[0035]
The support disk 33 is attached to the base 20 of the claw member 16 so as to be in close contact with the base 20 from both sides. Three holes 34 of the support disk 33 are selected every other one of the six positioning holes 32 of the base 20. It is mounted so as to coincide with the three positioning holes 32. Then, a plurality of units are fitted to the support shaft 29 with one claw member 16 and two support disks 33 as one unit. If the claw portions 21 of the claw members 16 of the respective units are fitted by being shifted by 60 degrees with respect to the support shaft 29, they can be mounted in a screw shape when viewed from the axial direction of the support shaft 29 as shown in FIG. . Then, the cylindrical body 17 is fitted between the units, and both ends of the cylindrical body 17 are fitted to the flange portions 36 of the support disk 33 so as to keep a predetermined interval.
[0036]
Three elongate support rods 48 are inserted through the three holes 34 of the support disk 33 of each unit and the positioning holes 32 of the base 20 of the claw member 16 corresponding thereto, and are substantially parallel to the support shaft 29. It is supported by. One end of each support rod 48 is formed in the shape of a head of a bolt, and the other end is formed with a thread groove. An outermost cover member 45 is fitted to the support shaft 29 at the end of the support shaft 29 on the rotary shaft 15 side. The cover member 45 has a circular shape and covers an operation member 37 described later. A regular hexagonal through hole 47 substantially matching the cross-sectional shape of the support shaft 29 is formed in the center thereof, and three holes through which the above-described three support rods 48 pass are formed around the through hole 47. A portion 46 is drilled.
[0037]
On the other hand, the rotary shaft 15 is formed to have a regular hexagonal cross-sectional shape, and the insertion portion 30 is formed at the end as described above, and the support shaft 29 is supported by the shaft. The disk-shaped operating member 37 and the rotating member 41 are fitted to the rotary shaft 15. The operating member 37 is provided with a fitting hole 39 at the center thereof for fitting the rotary shaft 15, and the fitting hole 39 is substantially equal to a circumference connecting the vertices of a regular hexagon which is a cross-sectional shape of the rotary shaft 15. It has a matching shape. Therefore, the operating member 37 is rotatable around the rotary shaft 15. Further, three long holes 38 are formed around the fitting hole 39, and each of the long holes 38 has a predetermined radius along a circumference drawn with a predetermined radius around the axis of the rotary shaft 15. It has an arc shape having a width. The shapes of the long holes 22 are the same, and are formed by being shifted by 120 degrees. Three screw holes 40 are formed between the long holes 38 and the fitting holes 39 for screwing and fixing the screw grooves formed at the ends of the three support rods 48, respectively. I have.
[0038]
The rotating member 41 is mounted on the opposite side of the cover member 45 about the operating member 37 and is formed in a circular shape like the cover member 45, and is in close contact with a flange protruding around the cover member 45. Then, the operation member 37 is covered. A mounting hole 43 having substantially the same shape as a regular hexagon, which is a cross-sectional shape of the rotary shaft 15, is formed in the center of the rotating member 41, and three holes 42 operate around the mounting hole 43. The holes are formed so as to be shifted from each other by 120 degrees corresponding to the three long holes 38 formed in the member 37. A rod-shaped member 44 is inserted into the three holes 42 and loosely fits into the elongated hole 38, and a nut or the like is fixed to an end of the rod-shaped member 44 to prevent the rod-shaped member 44 from coming off from the elongated hole 38. Since the rod member 44 is loosely fitted in the long hole 38, the operating member 37 is rotatable around the rotary shaft 15 by the arc-shaped length of the long hole.
[0039]
FIG. 9 is an exploded front view of the vicinity of the joint between the rotary shaft 15 and the support shaft 29. The support shaft 29 is supported by inserting the insertion portion 30 of the rotary shaft 15. The support disk 33, the claw member 16, the support disk 33, the cylindrical body 17, and the cover member 45 are fitted to the support shaft 29 in this order, and are penetrated and connected by the support rod 48. An operating member 37 and a rotating member 41 are fitted to the rotary shaft 15, and both are connected by a rod-shaped member 44.
[0040]
When the rotary shaft 15 rotates in the above configuration, the rotating member 41 rotates following the rotary shaft 15 because the rotary member 41 is fitted to the rotary shaft 15 through the regular hexagonal mounting hole 43. When the rotating member 42 rotates, the rod-like member 44 inserted into the hole 42 follows and rotates. However, since the rod-like member 44 is loosely fitted in the long hole 38 of the operating member 37, the long hole 38 When the rod-shaped member 44 is locked at one end of the actuator, the operating member 37 follows and rotates. Since one end of each of the three support rods 48 is fixed to the operating member 37, the cover member 45, the support disk 33, the claw member 16, and the cylinder 17 to which the support rod 48 is connected are integrally formed. 37 to rotate. Therefore, when the rotary shaft 15 rotates and the claw member 16 comes into contact with the cultivated soil, the rotary member 15 receives the resistance from the cultivated soil and once rotates in the opposite direction to the rotary shaft 15. When it is regulated by the above, the rotary member follows the rotary shaft 15 and rotates, and the claw member 16 is pushed into the cultivated soil to cut the cultivated soil. Therefore, the resistance at the time of pushing the claw member 16 can be reduced, and the six claw members 16 can be arranged in a screw shape, so that it is possible to plow in a more balanced manner.
[0041]
In the above embodiment, the claw member 16 has been described as having the base portion 20 and the claw portion 21 integrated, but the base portion 20 and the claw portion 21 may be formed separately. As shown in FIG. 10, a long hole 22 and a fitting hole 23 are formed in the base 20 as in FIG. 3, and a contact part 50 and two base holes 52 are formed in the upper part. . Two mounting holes 53 are formed in the lower part of the claw 21 corresponding to the two base holes 52, and a notch 51 is formed between the mounting holes 53. As shown in FIG. 11, the lower portion of the claw portion 21 is brought into close contact with one surface of the base portion 20 so that the base hole 52 and the mounting hole 53 are aligned and fixed by the fixing member 54. As the fixing member 54, a bolt and a nut can be used, but it is only required that the fixing can be performed, and there is no particular limitation.
[0042]
As shown in FIG. 12, if the claw 21 is attached to the base 20 so as to straddle the contact portion 50 with the notch 51 and fixed by the fixing member 54, the claw 21 is inclined with respect to the base 20. Can be attached. When the claw portion 21 is attached obliquely in this way, when the claw portion 21 rotates, the cultivated soil can be gathered to one side in the traveling direction. Although a conventional claw member is formed into a curved shape so as to be twisted in order to achieve such an effect, it is difficult to form and cannot be twisted from the root. Since the claw member of the present invention can be easily processed and can be attached diagonally from the root, the tilling workability is also improved. Further, since the mounting direction of the claw portion can be easily changed only by removing the fixing member, the mounting operation of the claw portion can be performed easily and in a short time.
[0043]
FIG. 13 shows the base 20 when the base 20 and the claw 21 of the claw member 16 shown in FIG. 7 are separated. The claw member 16 can be configured by attaching the claw portion 21 to the base hole 52 as in FIG. FIGS. 14 and 15 show examples in which a contact portion 51 and a base hole 52 are provided above and below the base portion 20. As shown in FIG. 16, if the two claws 21 are fixed vertically by the fixing member 54, the number of claws can be doubled. Further, similarly to FIG. 12, the claw portion 21 can be appropriately attached diagonally, so that it is possible to easily cope with various tillage operations.
[0044]
【The invention's effect】
As described above, in the tilling claw attachment device according to the present invention, since the claw member has a fitting hole having substantially the same shape as a circle connecting the vertices of a regular hexagon which is a cross section of the rotary shaft, the claw member has an axial direction with respect to the rotary shaft. The two disks constituting the rotating member have mounting holes that are almost the same shape as a regular hexagon, which is a cross section of the rotary shaft, so that they can be moved only in the axial direction. Can be. Then, the regulating member formed of a rod-shaped member is loosely fitted in the arc-shaped long hole formed in the claw member and penetrates the hole formed in the disk sandwiching the claw member from both sides. Is rotatable with respect to the rotary shaft by the length of the long hole. With such a simple structure, it is possible to reliably rotate the entire claw member around the axis by a predetermined angle.
[0045]
The forward / reverse rotary tillage device according to the present invention can arrange each unit at a predetermined interval by fitting a claw member and a rotation member as one unit and fitting a cylinder of a predetermined length therebetween. By changing the length of the body, the mounting position of each unit can be easily changed. In addition, a plurality of elongated holes of each claw member and a plurality of holes of each disk corresponding thereto are provided, and a linear rod-like member supported substantially parallel to the rotary shaft is provided with a hole of each disk corresponding to the elongated hole of each claw member. By penetrating the hole, each claw member can be positioned with a simple structure, and the claw can be easily set to be shifted by a predetermined angle when viewed from the axial direction of the rotary shaft.
[0046]
The forward / reverse rotary tillage device according to the present invention is configured such that a plurality of claw members fitted to the support shaft are integrated with a connecting member, and the whole of them is rotatable relative to the rotary shaft by a predetermined angle together with the operating member. can do. Therefore, in both cases of the down cut and the up cut, when the claw portion of the claw member comes into contact with the cultivated soil, the entire claw member rotates by a predetermined angle to start the cutting operation of the cultivated soil, and the claw member gradually moves. By going into the arable soil, its resistance can be reduced. Further, since the claw members are movable in the axial direction with respect to the support shaft, the number of the claw members and the mounting position in the axial direction can be arbitrarily set. At this time, if a cylindrical body having a predetermined length is fitted between the claw members, the claw members can be positioned easily and reliably. And, by providing a rod-shaped member through a plurality of positioning holes provided in the base of the claw member, the rod-shaped member can be integrated with a simple structure, and the positioning holes penetrating through the rod-shaped member can be shifted in the axial direction. Can be easily set by shifting the claw portions of each claw member viewed from above by a predetermined angle. Therefore, it becomes possible to reduce the resistance at the time of tilling by attaching like a screw.
[0047]
The claw member for a rotary tillage device according to the present invention includes a claw portion for fixing the claw portion to one surface of the base portion and a case where the claw portion is attached and fixed so as to straddle the contact portion of the base portion with the cutout portion of the claw portion. Can be set. In other words, when one surface of the base is along the traveling direction of the tilling device and the struts are fixed across the claws, the claws will be set obliquely with respect to the traveling direction, and the obliquely outward direction will be set. If it is set to, the claws gather the soil outward while tilling, and if it is set inward and diagonally, the claws will gather the soil inward while tilling, Various tillage can be performed by appropriately setting, and the setting can be easily changed. In particular, since the claw portion is inclined from the root, the cultivated soil is more easily inverted, and, for example, a trenching operation can be performed efficiently.
[Brief description of the drawings]
FIG. 1 is a schematic view of a forward / reverse rotary tillage device according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of a forward / reverse rotary tillage device according to the embodiment of the present invention.
FIG. 3 is a front view and a side view of a claw member according to the embodiment of the present invention.
FIG. 4 is a front view and a side view of the rotating member according to the embodiment of the present invention.
FIG. 5 is an operation diagram of the claw member according to the embodiment of the present invention as viewed from an axial direction of a rotary shaft.
FIG. 6 is a view of a plurality of claw members of the embodiment according to the present invention as viewed from the axial direction of a rotary shaft.
FIG. 7 is an exploded perspective view of a forward / reverse rotary tiller according to the embodiment of the present invention.
FIG. 8 is a view of the plurality of claw members according to the embodiment of the present invention, as viewed from an axial direction of a rotary shaft.
FIG. 9 is an exploded front view of the forward / reverse rotary tillage device of the embodiment according to the present invention.
FIG. 10 is an exploded view of the claw member according to the embodiment of the present invention.
FIG. 11 is an assembly view of a claw member according to the embodiment of the present invention.
FIG. 12 is an assembly diagram of a claw member according to the embodiment of the present invention.
FIG. 13 is a front view of a base of the claw member according to the embodiment of the present invention.
FIG. 14 is a front view of a base of the claw member according to the embodiment of the present invention.
FIG. 15 is a front view of a base of the claw member according to the embodiment of the present invention.
FIG. 16 is an assembly view of a claw member according to the embodiment of the present invention.
[Explanation of symbols]
1 aircraft
2 Gearbox
3 Horizontal frame
4 Transmission shaft frame
5 Support frame
7 Chain frame
10 Gear mechanism
11 Transmission shaft
12 sprockets
13 chain
14 Sprocket
15 Rotary shaft
16 Claw members
17 cylinder
18 Cover
20 base
21 Claw
22 long hole
23 Mating hole
24 Rotating member
25 Flange
26 hole
27 Mounting hole
28 Bar-shaped member
29 Support shaft
30 insertion part
31 Mating hole
32 Positioning hole
33 Support disk
34 hole
35 Through hole
36 Blunge part
37 Working members
38 Slot
39 Mating hole
40 screw holes
41 Rotating member
42 hole
43 Mounting hole
44 Bar-shaped member
45 Cover member
46 hole
47 Through hole
48 support rod
50 Abutment
51 Notch
52 base hole
53 Mounting hole
54 Fixing member

Claims

A claw member having a claw portion and a base portion fitted to a rod-shaped shaft, the claw member being movable in the axial direction of the shaft, and being rotatable around the shaft; and rotating the claw member by rotating the shaft. And a restricting means for rotating the claw member about the axis by a predetermined angle, the cultivating claw mounting device being provided.

At the base of the claw member, an arc-shaped long hole is perforated along a circumference centered on the axis of the shaft, and the restricting means is fitted to the shaft and extends in the axial direction of the shaft. A rotating member that is movable only in the direction of rotation of the shaft and that follows the rotating operation of the shaft, and a regulating member that is protruded from the rotating member and that fits loosely into a long hole of the claw member. The tilling claw mounting device according to claim 1, wherein the claw member is rotatable around the axis by a predetermined angle defined by both ends of the elongated hole by the regulating member.

The forward / reverse rotary plow according to claim 1 or 2, wherein the shaft is a rotary shaft, and the plurality of claw members are fitted to the rotary shaft at predetermined intervals.

4. The forward / reverse rotary tiller according to claim 3, wherein the plurality of claw members are arranged such that claw portions of each claw member are shifted by a predetermined angle when viewed from the axial direction of the rotary shaft. 5.

A rotary shaft having a regular hexagonal cross-sectional shape, and a fitting hole having substantially the same shape as a circle connecting the vertices of the regular hexagon, which is a cross-section of the rotary shaft, is drilled, and a base fitted to the rotary shaft with the fitting hole. And a pair of disks provided so as to sandwich the base of the claw member, and each of the disks has, at the center thereof, a mounting hole having substantially the same shape as a regular hexagon which is a cross section of the rotary shaft. A rotary member fitted to the rotary shaft with the mounting hole, and a base portion of the claw member has an arc-shaped long hole along a circumference centered on the axis of the rotary shaft. A hole is formed in a portion of each of the two disks of the rotating member that faces the long hole of the claw member, and the hole penetrates the hole and forms the long hole. A forward / reverse rotation rotor comprising a rod-shaped regulating member that is loosely fitted to Tillage equipment.

The forward / reverse rotary tilling apparatus according to claim 5, wherein a plurality of units are fitted to the rotary shaft at predetermined intervals with the claw member and the rotating member as one unit.

Between the units, a cylindrical body of a predetermined length is fitted on the rotary shaft, and both ends of the cylindrical body are projections provided on a disk of the rotating member of each unit. The forward / reverse rotary tillage device according to claim 6, which is supported.

At the base of the claw member of each unit, a plurality of the arc-shaped long holes are formed, and the long holes are formed in the same shape and shifted by a predetermined angle. The plate is provided with a plurality of holes each of which is offset by a predetermined angle at a portion facing the plurality of elongated holes, and the regulating member is configured such that a claw portion of each of the claw members is an axis of the rotary shaft. The forward / reverse rotary tillage device according to claim 6 or 7, wherein the claw member of each unit is loosely fitted in the elongated hole so as to be displaced by a predetermined angle when viewed from the direction.

The regulating member is composed of a plurality of linear rods supported substantially in parallel with the rotary shaft, and each rod is loosely fitted into the elongated hole provided at the base of the claw member of each unit. The forward / reverse rotary tilling device according to claim 8, wherein the hole extends through the hole of each of the disks corresponding to the elongated holes.

A plurality of claw members having a rod-shaped support shaft, a claw portion and a base portion fitted to the support shaft, a connecting member connecting the plurality of claw members to operate integrally, and passing through an axis of the support shaft; A rotary shaft having an axis substantially coincident with a straight line, an operating member fitted to the rotary shaft and rotatable about the rotary shaft, and the operating member following the rotation of the rotary shaft. Regulating means for rotating the operating member so as to be rotatable around the rotary shaft by a predetermined angle, wherein the connecting member is connected to the operating member, and the rotation of the rotary shaft is provided. A forward / reverse rotary tilling apparatus, wherein a plurality of the claw members are integrally rotated via the connecting member by rotating the operating member.

A plurality of positioning holes are formed in the base of the claw member at predetermined angles along a circumference centered on the axis of the support shaft, and the connecting member is substantially formed in the support shaft. 11. The device according to claim 10, comprising a plurality of linear rod members supported in parallel, wherein each of the rod members penetrates the positioning hole provided at a base of each of the claw members. Forward / reverse rotary tillage device.

Each rod-shaped member of the connecting member penetrates the positioning hole of each claw member such that the claw portion of each claw member is disposed at a predetermined angle when viewed from the axial direction of the support shaft. The forward / reverse rotary tillage device according to claim 11, characterized in that:

The operating member has an arc-shaped long hole formed along a circumference centered on the axis of the rotary shaft, and the regulating means rotates in accordance with the rotation of the rotary shaft. The forward / reverse rotary according to any one of claims 10 to 12, further comprising: a rotating member that moves, and a regulating member that is provided on the rotating member and that is loosely fitted in a long hole of the operating member. Tillage equipment.

The forward / reverse rotary tiller according to any one of claims 10 to 13, wherein a plurality of the claw members are fitted on the support shaft at predetermined intervals.

Between the plurality of claw members, a cylindrical body of a predetermined length is fitted on the support shaft, and both ends of the cylindrical body are supported by protrusions provided at the base of each of the claw members. The forward / reverse rotary tillage device according to claim 14, characterized in that:

A claw member for a rotary tilling device including a base mounted on a shaft, a claw part separate from the base part, and a fixing member for fixing the claw part to the base part, wherein the base part has a predetermined shape. It has two base holes that are pierced and penetrated at an interval, and a contact portion is formed between the two base holes, and the claw portion is pierced and pierced at a predetermined interval. And a notch formed between the two mounting holes, and the fixing member is a member that is inserted into the base hole and the mounting hole to fix the claw to the base. Wherein the claw portion is attached to the base portion so as to straddle the contact portion with the cutout portion and can be fixed by the fixing member.