JP3659883B2

JP3659883B2 - Seedling supply structure of seedling planting equipment

Info

Publication number: JP3659883B2
Application number: JP2000334552A
Authority: JP
Inventors: 博幸三木; 強井上; 吉秀宮西; 学東郷; 幹夫奥山
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2000-11-01
Filing date: 2000-11-01
Publication date: 2005-06-15
Anticipated expiration: 2020-11-01
Also published as: JP2002136204A

Description

【０００１】
【発明の属する技術分野】
本発明は、苗植付機構の苗植え運動に連動して機体横方向に往復移送されて苗植付機構に苗供給する苗載せ台と、苗載せ台に載置された苗を苗植付機構が苗取出しする苗供給口に向けて縦送りする苗縦送りベルトとを備えている苗植付装置の苗供給部構造に関する。
【０００２】
【従来の技術】
上記の苗植付装置において、苗載せ台に載置した苗が苗載置部から浮き上がると、苗縦送りベルトによる苗送りが行われにくくなるとか、苗が苗載せ台上で横ずれするとかのトラブルが発生しやすくなる。このため、苗載せ台に載置された苗に上方からストップ作用するとともに苗載せ台の横幅方向に並ぶ複数本の苗ステーを設け、苗載せ台上の苗が苗載置部から浮き上がることを抑制するように構成される。
【０００３】
この苗ステーは、苗載せ台に苗を供給するとか苗載せ台から残留苗を取出す場合、障害物にならないように苗載置部から上昇した解除位置に切り換える必要がある。このため、従来、苗ステーを直接手で持って作用位置や解除位置に切り換え操作するようになっていた。
【０００４】
また、従来の苗植付装置では、複数本の苗ステーのいずれもが苗縦送りベルトから横側に外れた部位で苗に作用するようになっていた。
【０００５】
また、複数の苗植付機構の一部による苗植付けを停止させながら植え付け作業する場合などのため、苗載せ台に載置された苗を苗縦送りベルトによって縦送りされないようにストップさせる苗ストッパーを設け、苗植付機構が駆動されても、苗供給口には苗が供給されないようにすることを可能にされる。
【０００６】
この苗ストッパーは、苗載せ台の苗載置部に下降して苗にストップ作用する作用位置と、苗載せ台の苗載置部から上昇して苗ストップを解除する解除位置に切り換えられるようにするとともに、解除位置に切り換えた際には、その位置から下降しないように解除位置に保持できるようにする必要がある。このため、従来、苗ストッパーの基端側に設けた左右一対の取付け部によって支持部材に揺動昇降自在に取付け、苗ストッパーが左右側で支持されながら作用位置や解除位置にスムーズに移動する。苗ストッパーの基端側に左右一対のロック部を設けるとともに、苗ストッパーを解除位置に上昇操作すれば、これに伴ってロック部が自ずと固定部に係合して苗ストッパーを解除位置に保持し、苗ストッパーを解除位置から下降操作しようとすると、この操作力によってロック部が固定部から自ずと外れ、苗ストッパーの揺動操作を行うだけで、ロック手段を作用させるとか解除させる手間を掛けなくとも、苗ストッパーが解除位置と作用位置とに切り換わるとともに解除位置に保持できるというものがあった。
【０００７】
【発明が解決しようとする課題】
従来、苗ステーを作用させたり解除させる際、苗ステーを直接手で持って切り換え操作せねばならないことにより、また、苗ステーは作用位置になると、苗の葉どうしの間に入り込んで持ちにくくなることにより、操作しにくくなっていた。殊に、解除側に切り換える際、苗ステーを葉の間から持ち上げる必要があることから、操作しにくくなっていた。
【０００８】
また、従来の苗植付装置では、複数本の苗ステーのいずれもが苗縦送りベルトから横側に外れた部位で苗に作用することから、苗載せ台の苗載置部に複数本の苗縦送りベルトを苗載せ台の横幅方向に並べて設ける必要があった。
【０００９】
すなわち、苗ステーが苗縦送りベルトの横外側に位置していると、苗縦送りベルトの横幅が広くなるほど、苗縦送りベルトに載っている苗部分には苗ステーによる支持作用が及びにくくなり、苗縦送りベルトが苗送りをする際、苗がベルトから浮き上がってスリップしやすくなる。また、苗縦送りベルトの横幅が狭いほど、苗縦送りベルトによる搬送作用が及ぶ苗の範囲が狭くなる。このため、苗載置部の横幅の割には横幅が狭い苗縦送りベルトの複数本を苗載置部の横幅方向に並べて設け、ベルトに載っている苗部分にも苗ステーによる支持作用が及びやすいようにするとともに、苗の横幅方向での広範囲にわたって苗縦送りベルトの搬送作用が及ぶようにする必要があった。
【００１０】
従来の苗ストッパーの場合、苗ストッパーを作用位置や解除位置に切り換える際、左右のロック部の一方が固定部から外れたり固定部に係合した後に他方のロック部が固定部から外れたり係合したりすると、ロックが係脱する際の苗ストッパーの動きがスムーズでなくなって切り換え操作がしにくくなる。また、ロック部に無理な力が作用して変形などのトラブルが発生しやすくなる。このため、左右のロック部が等しいタイミングで固定部に対して係脱するように精度よく製作するとともに組み付ける必要があった。
従来の苗ストッパーの場合、苗ストッパーを作用位置や解除位置に切り換える際、左右のロック部の一方が固定部から外れたり固定部に係合した後に他方のロック部が固定部から外れたり係合したりすると、ロックが係脱する際の苗ストッパーの動きがスムーズでなくなって切り換え操作がしにくくなる。また、ロック部に無理な力が作用して変形などのトラブルが発生しやすくなる。このため、左右のロック部が等しいタイミングで固定部に対して係脱するように精度よく製作するとともに組み付ける必要があった。
【００１１】
本発明の目的は、苗ステーを作用位置や解除位置に切り換え操作しやすいとか、数少ない苗縦送りベルトや極力軽量な苗ステーで苗の縦送りやずれ動き防止が精度よくできるとか、苗ストッパーを操作簡単かつスムーズに切り換え操作できる状態に容易かつ能率よく製作及び組み立てできる苗植付装置の苗供給部構造を提供することにある。
【００１２】
【課題を解決するための手段】
請求項１による発明の構成、作用、効果はつぎのとおりである。
【００１３】
〔構成〕
請求項１による発明は、苗植付機構の苗植え運動に連動して機体横方向に往復移送されて苗植付機構に苗供給する苗載せ台と、苗載せ台に載置された苗を苗植付機構が苗取出しする苗供給口に向けて縦送りする苗縦送りベルトとを備えている苗植付装置の苗供給部構造において、前記苗載せ台の苗載置部から苗が浮き上がることを抑制するとともに苗載せ台の横方向に並ぶ複数本の苗ステーを、一部の苗ステーが前記苗縦送りベルトの直上方に位置し、他の苗ステーが前記苗縦送りベルトの横外側に位置する配置にして、前記複数本の苗ステーの基端側に連結する苗載せ台横方向の１本の支持部材によって支持される状態で設け、前記支持部材に、苗の浮き上がりを抑制する前記苗ステーの下降作用位置で保持部に保持されるとともに前記苗ステーを上方移動させた上昇解除状態で支持体に係止して位置保持される位置決めアームを設け、前記支持部材を上下位置変更自在に前記支持体に取付けるとともに、前記支持部材の上下方向の各位置において前記苗ステーの下降作用状態で前記位置決めアームを前記保持部に保持させることにより前記苗ステーが下降作用位置に保持されることを特徴とする。
【００１４】
〔作用〕
複数本の苗ステーの一部が苗縦送りベルトの直上方に位置し、他の苗ステーが縦送りベルトの横外側に位置しているものだから、苗縦送りベルトとして横幅が苗載置部の横幅の割には広いベルトを採用して苗縦送りベルトの設置数を少なく済ませながら苗縦送りベルトによる搬送力を苗の横幅方向での広範囲にわたって作用させて、しかも、苗が苗縦送りベルトから浮き上がることも苗縦送りベルトから外れた苗載置部から浮き上がることも苗ステーによって抑制させて、苗を縦送り不足やスリップによるずれ動きが発生しにくいように精度よく供給できる。
【００１５】
各苗ステーに苗から支持反力が作用しても、苗ステーの下降作用位置で位置決めアームを保持部で保持されているので、苗の浮き上がりを抑制する苗ステーを苗支持反力に抗して下降作用位置に保持できる。
苗ステ−を上方に移動させると、苗ステーが苗載置部に対する苗供給や苗載置部からの苗取出しの障害物になりにくいように苗載置部から上方に大きく離れた上昇解除状態となる。
支持部材の上下方向の各位置において苗ステーの下降作用状態で位置決めアームを保持部に保持させることにより、苗ステーが下降作用位置に保持される。
【００１６】
〔効果〕
したがって、苗の横幅方向での広範囲にわたって苗縦送りベルトによる搬送力を作用させて、苗が苗縦送りベルトに載る部分と苗縦送りベルトから外れた部分のいずれにおいても浮き上がったりずれ動いたりすることを抑制して苗植付機構に苗を供給量不足がないように精度よく供給できる。その割には、横幅の広い苗縦送りベルトを採用してその必要数を少なく済ませるとともに、苗ステー全体の軽量化を図って、軽量化や構造の簡略ができる。
【００１７】
各苗ステーに苗から支持反力が作用しても、苗ステーの下降作用位置で位置決めアームを保持部で保持されているので、苗ステーを苗支持反力に抗して下降作用位置に保持できこれにより苗の浮き上がりを抑制することができる。
苗ステ−を上方に移動させると、苗ステーが苗載置部から上方に大きく離れた上昇解除状態となるので、苗載置部に対する苗供給や苗載置部からの苗取出しの障害物になりにくい。
【００１８】
請求項２による発明の構成、作用、効果はつぎのとおりである。
【００１９】
〔構成〕
請求項２による発明は、請求項１の発明において、前記苗縦送りベルトの上方に位置する前記苗ステーの苗に支持作用する長さを、苗縦送りベルトの左右両横外側に位置する前記苗ステーの苗に支持作用する長さより短くしてある。
【００２０】
〔作用〕
又、請求項２の発明には前記作用を備えながら更に次の作用を奏する。
苗ステーは苗の葉どうしの間に入り込むものだから、苗葉に引っ掛かって苗のすべりによるずれ動きを抑制する。また、苗縦送りベルトの苗が載る表面側には苗がスリップしにくいように苗係止突起が設けられていることから、苗は苗縦送りベルトに載る部分よりも苗縦送りベルトから外れた部分でずれ動きやすくなる。このため、苗縦送りベルトの横外側に位置する苗ステーの前記長さを短くしたものでは、苗が苗縦送りベルトから外れた部分でずれ動きやすくなる。そして、苗縦送りベルトの横外側に位置する苗ステーの前記長さも、苗縦送りベルトの上方に位置する苗ステーの前記長さも長くすると、苗ステー全体としての重量が重くなる。これに対し、苗縦送りベルトの上方に位置する苗ステーの前記長さが短く、苗縦送りベルトから外れて位置する苗ステーの前記長さが長いものだから、苗ステー全体としての重量を軽くしながら、苗の苗縦送りベルトに載る部分でのずれ動きも、苗縦送りベルトから外れた部分でのずれ動きも抑制できる。
【００２１】
〔効果〕
したがって、請求項２の発明には、苗の横幅方向での広範囲にわたって苗縦送りベルトによる搬送力を作用させて、苗が苗縦送りベルトに載る部分と苗縦送りベルトから外れた部分のいずれにおいても浮き上がったりずれ動いたりすることを抑制して苗植付機構に苗を供給量不足がないように精度よく供給できる。その割には、横幅の広い苗縦送りベルトを採用してその必要数を少なく済ませるとともに、苗ステー全体の軽量化を図って、軽量化や構造の簡略ができる。
【００２２】
【発明の実施の形態】
図１に示すように、左右一対の操向及び駆動自在な前車輪１、左右一対の駆動自在な後車輪２、機体前端部に位置するエンジン３を有する原動部、機体後端部に位置する運転座席４を有する運転部を備える走行機体の機体フレーム５の後端部に、リンク機構６を介して苗植付装置１０を連結し、走行機体のエンジン３の出力を回転軸７によって苗植付装置１０に伝達するように構成するとともに、リンク機構６の操作部と機体フレーム５とにわたって連結してあるリフトシリンダ８でリンク機構６を機体フレーム５に対して上下に揺動操作することによって、苗植付装置１０を昇降操作するように構成して、乗用型田植機を構成してある。
【００２３】
図１、図２などに示すように、前記苗植付装置１０は、前記回転軸７に入力部が連結している駆動ケース１１、この駆動ケース１１の後部から機体左向きと右向きとに延出するパイプ製の伝動ケース１２、この左右の伝動ケース１２の先端部に前端部が連結している植付駆動ケース１３のそれぞれを備えている植付機体と、前記各植付駆動ケース１３の後端部の両横側に駆動自在に取付けた苗植付機構１４と、これらの苗植付機構１４の前方に後端側ほど低レベルに位置する後下がりの傾斜姿勢で位置する一つの苗載せ台２１によって各苗植付機構１４に苗供給する苗供給部２０と、前記植付機体の下部に機体横方向に並べて取付けてあるとともに苗植付機構１４が圃場に苗植付けするに先立ってその植付け箇所を整地するように構成してある複数個の接地フロート１５とによって構成してある。
【００２４】
前記複数の苗植付機構１４のそれぞれは、前記植付駆動ケース１３が駆動回動自在に支持している駆動アーム１６と揺動自在に支持している揺動リンク１７とにわたって取付けた植付けアームによって構成してある。この植付けアームの先端側には苗植付け爪１４ａと苗押出し具とを備えてある。
すなわち、各苗植付機構１４は、苗植付け爪１４ａの先端側が苗載せ台２１の下端付近に位置する苗供給口２２を上方から下方に通って圃場に至り、圃場から上昇して苗供給口２２に戻る機体側面視で環状の運動軌跡を描いて上下に回動するように駆動アーム１６によって駆動され、苗植付け爪１４ａが苗供給口２２で苗載せ台１４に載置されているマット状苗Ａの下端部から一株分のブロック苗を切断して取出し、苗植付け爪１４ａがこのブロック苗を圃場の泥土部に持ち込むと、苗押出し具がブロック苗を苗植付け爪１４ａから押し出して植え付けるように苗植え運動を行う。
【００２５】
図３に示すように、前記苗供給部２０には、前記複数の苗植付機構１４に各別に供給する複数枚のマット状苗Ａを各別に載置する複数の苗載置部２１ａが機体横方向に並んでいる前記苗載せ台２１、この苗載せ台２１の前記各苗載置部２１ａの下端側に一つずつ設けた苗縦送りベルト２３、苗載せ台２１の横方向に並ぶ複数本の苗ステー５１ａ，５１ｂを有する苗ステー装置５０、苗載せ台２１の下端側の上方に苗載せ台２１の横方向に並んでいる複数個の苗ストッパー６０、苗載せ台２１の下端側に配置した機体横方向に沿う方向のガイドレール２５などを備えてある。
【００２６】
図１、図４などに示すように、苗載せ台２１の上端側を、植付け機体に立設した支柱２６の上端側に機体横方向に摺動自在に支持させ、苗載せ台２１の下端側を、前記ガイドレール２５に摺動自在に支持させてある。これにより、苗載せ台２１は、植付け機体に対してその横方向にガイドレール２５に沿って移動するように支持されている。
【００２７】
図２などに示すように、苗載せ台２１の裏面側に一端側が連結している苗載せ台移送体２７ａと、この苗載せ台移送体２７ａの他端側を貫通しているとともに前記駆動ケース１１によって回動自在に支持されている機体横方向の苗横送り軸２７ｂとにより、苗載せ台２１を各苗植付機構１４の苗植え運動に連動させて機体横方向に往復移送する苗横送り機構を構成してある。すなわち、苗横送り軸２７ｂは、駆動ケース１１の内部に位置する横送り駆動機構（図示せず）によって各苗植付機構１４の駆動に連動させて回動駆動される。苗載せ台移送体２７ａは、苗横送り軸２７ｂの周面に設けてある螺旋溝２７ｃに摺動自在に係合している送り駒体（図示せず）を備えており、苗横送り軸２７ｂが駆動されると、この駆動力によって苗横送り軸２７ｂに沿わせて往復移送されて苗載せ台２１を往復移動させる。
【００２８】
図５に示すように、ガイドレール２５の長手方向での複数箇所から延出している取付け杆２８それぞれの先端側を、前記植付け駆動ケース１３に固定したレール支持体２９の一対の支持部２９ａに摺動自在に貫通させてある。これにより、ガイドレール２５は、植付け機体に対してその横方向には移動しない状態で、かつ、各苗植付機構１４の苗植付け爪１４ａの運動軌跡に接近したり離れる方向には移動する状態で植付け機体に支持されている。植付け機体が備えるブラケット３０によって回動自在に支持されている機体横向きの丸パイプ材で成る苗取り量調節軸３１の途中から一体回動自在に延出している調節アーム３２の先端側が前記各取付け杆２８の基部に位置する調節用凹部に係入しており、植付け作業を行うなどの通常時は、苗取り量調節軸３１を調節した所定の回転位置に固定して調節アーム３２を揺動しないようにロックしておくことにより、ガイドレール２５は調節アーム３２の揺動位置によって決まる所定の取付け位置に固定されている。
【００２９】
ガイドレール２５の上端部に、横断面Ｌ型の板体部を一体成形して苗載せ台２１の各苗載置部２１ａに載置されたマット状苗Ａの下端部を受け止め支持するストッパー部２５ａを設けてあるとともに、このストッパー部２５ａの前記各苗植付機構１４の苗植付け爪１４ａの運動軌跡に対応する部分に、切欠きを設けて前記苗供給口２２を形成してある。
【００３０】
図４、図６などに示すように、苗載せ台２１の各苗載置部２１ａに位置する前記苗縦送りベルト２３は、マット状苗Ａが載ってこの苗Ａに搬送作用する表面側に苗係止突起２３ａを苗縦送りベルト２３の長手方向と横幅方向との両方向に並べて設けてあるゴム製の無端ベルトで成り、苗載置部２１ａの苗載せ台縦方向での中間部の裏側に遊転自在に設けたベルト支持輪体３３と、苗載置部２１ａの下端部の裏側に駆動自在に設けたベルト駆動輪体３４とにわたって巻回してある。これにより、苗縦送りベルト２３は、ベルト駆動輪体３４が駆動されると、ベルト駆動輪体３４の回動力によって駆動され、苗載置部２１ａのマット状苗Ａを前記苗供給口２２に向けて縦送りする。このとき、苗係止突起２３ａがマット状苗Ａの床土部に係止して移送力を伝達し、マット状苗Ａをスリップしにくいように縦送りする。
【００３１】
全ての苗縦送りベルト２３のベルト駆動輪体３４を一本の六角軸でなる回転支軸３５に一体回転自在に取付けて、この回転支軸３５を回転操作することによって全ての苗縦送りベルト２３を駆動できるように構成してある。図２、図５などに示すように、前記回転支軸３５の途中に取付けた一つの一方向回転クラッチ３６と、前記駆動ケース１１が一本の回転支軸３７を介して駆動揺動自在に支持している左右一対の駆動アーム３８とにより、苗載せ台２１が左右の横送りストロークエンドに達した際に全ての苗縦送りベルト２３を苗縦送り方向に設定ストロークだけ駆動する苗縦送り機構３９を構成してある。すなわち、左右の駆動アーム３８は、駆動ケース１１の内部に位置するカム式駆動機構（図示せず）によって常に設定角度を往復揺動するように駆動されている。苗載せ台２１が左側の横送りストロークエンドに到達した場合には、一回転方向の入力アーム３６ａが左側の駆動アーム３８の運動軌跡に入り込み、苗載せ台２１が右側の横送りストロークエンドに到達した場合には、一回転方向の入力アーム３６ａが右側の駆動アーム３８の運動軌跡に入り込み、いずれの場合も、駆動アーム３８が入力アーム３６ａに当接してこの入力アーム３６ａを苗縦送り方向に設定角度だけ回動させる。すると、この回動力が一回転方向クラッチ３６によって回転支軸３５に伝わって全てのベルト駆動輪体３４を苗縦送り側に駆動する。駆動アーム３８が入力アーム３６ａを苗縦送り側に駆動してから復動するとき、入力アーム３６ａが復元ばね（図示せず）によって苗縦送り方向とは反対方向に回動して待機位置に復帰するが、このときは、一回転方向クラッチ３６が入力アーム３６ａの復帰側の回動力を回転支軸３５に伝達しない。このため、苗縦送り駆動機構３９は、苗縦送りベルト２３を苗縦送りの回転方向のみに駆動する。
【００３２】
これにより、苗供給部２０は、苗載せ台２１の各苗載置部２１ａにマット状苗Ａを載置しておくと、この苗Ａを各苗植付機構１４に次の如く供給する。
すなわち、各苗植付機構１４が駆動されると、苗載せ台２１を前記苗送り機構によって苗植付機構１４の苗植え運動に連動させてガイドレール２５に沿わせて機体横方向に往復移送し、各苗植付機構１４の苗植付け爪１４ａがこの苗植付機構１４のための苗載置部２１ａに載置してあるマット状苗Ａの下端部から一株分のブロック苗をマット状苗Ａの横一端側から他端側に向けて順次に切断して取出していくように、各苗載置部２１ａのマット状苗Ａを苗載せ台２１によってガイドレール２５の苗ストッパー部２５ａに沿わせて苗供給口２２に対して機体横方向に往復移送する。そして、苗載せ台２１が左右の横移動ストロークエンドに到達すると、その都度、全ての苗縦送りベルト２３を前記苗縦送り機構３９によって苗縦送り側に設定ストロークだけ駆動し、各苗載置部２１ａのマット状苗Ａを苗縦送りベルト２３によって苗供給口２２に向けて苗植付機構１４が苗取出しする苗縦送り方向での大きさに相当する分だけ縦送りする。
【００３３】
図３などに示すように、前記苗ステー装置５０は、前記複数本の苗ステー５１ａ，５１ｂと、各苗ステー５１ａ，５１ｂの基端側どうしを連結している苗載せ台横方向の一本の丸棒材で成る支持部材５２とによって構成し、苗載せ台２１の下端側の両横端部と中間部との三個所に固定した合成樹脂製の支持体５３にわたって前記支持部材５２を回動自在に取付けることにより、この支持部材５２を苗載せ台２１に回動自在に支持させ、全ての苗ステー５１ａ，５１ｂが一挙に支持部材５２の機体横向きの軸芯まわりで上下に揺動するように苗載せ台２１に支持させてある。
【００３４】
図１３などに示すように、複数の苗ステー５１ａ，５１ｂの最も両横外側に位置する苗ステー５１ｂに、この苗ステー５１ｂの遊端側からこの苗ステー５１ｂの上方を通って支持部材５２に至るように形成して苗ステー５１ｂと支持部材５２とにわたって取付けた操作バー５４を備えさせ、左右の前記操作バー５４を持って支持部材５２の軸芯まわりで上下に揺動操作し、図６に示す如く支持部材５２の左右端部から一体回動自在に延出するとともに延出端側が支持体５３のループ内に入り込んでいる位置決めアーム５５が、支持体５３に一体形成してあるとともに支持体５３の上下方向に並んでいる図７や図１２の如き複数枚の保持片５６どうしの間に入り込んでこの保持片５６によって挟持されると、苗ステー装置５０が下降作用状態になるように構成してある。
【００３５】
苗ステー装置５０が下降作用状態になると、苗載せ台２１の各苗載置部２１ａに苗ステー５１ａ，５１ｂが三本ずつ下降し、各苗載置部２１ａにおける三本の苗ステー５１ａ，５１ｂは、これの作用部が苗載置部上のマット状苗Ａの葉どうしの間に入り込んでマット状苗Ａの床土部上面の上方近くに床土部上面にほぼ平行に位置する下降作用位置になり、マット状苗Ａが苗載置部２１ａから浮き上がろうとすると床土部の上面に作用部によって支持作用し、苗縦送りベルト２３による苗送りが不能になるまでは浮き上がらないようにその浮き上がりを抑制するように構成してある。このとき、前記左右の操作バー５４の苗ステー５１ｂに連結している側の一部を除く大部分は、持ちやすいようにマット状苗Ａの葉から上方に露出している。また、各苗ステー５１ａ，５１ｂに苗Ａから支持反力が作用しても、保持片５６による位置決めアーム５５の挟持のために苗ステー５１ａ，５１ｂを苗支持反力に抗して下降作用位置に保持できる。
【００３６】
図７に示すように、前記左右の位置決めアーム５５の遊端側が支持体５３の一部分に当ると、苗ステー装置５０が上昇解除状態になるように構成してある。苗ステー装置５０が上昇解除状態になると、全ての苗ステー５１ａ，５１ｂは、作用部が苗載置部２１ａに対する苗供給や苗載置部２１ａからの苗取出しの障害物になりにくいように苗載置部２１ａから上方に大きく離れた上昇解除位置になる。このとき、各苗ステー５１ａ，５１ｂが自重のためにさらに後方に下降しようとするが、各支持体５３が位置決めアーム５５にストップ作用するために、全ての苗ステー５１ａ，５１ｂを自重に抗して上昇解除位置に保持できる。
【００３７】
苗ステー装置５０は、さらに図１１に示す如く構成してある。すなわち、苗ステー装置５０を作用状態にしたとき各苗載置部２１ａに位置する三本の苗ステー５１ａ，５１ｂのうち、中央に位置する一本の苗ステー５１a は、苗縦送りベルト２３の直上方に位置して苗Ａにストッパー作用し、両横側に位置する苗ステー５１ｂは、苗縦送りベルト２３から横外側に外れた部位に位置して苗Ａにストッパー作用するように構成してある。苗縦送りベルト２３の直上方に位置する苗ステー５１ａの支持部材５２から延出して苗Ａに支持作用する長さＬ１が苗縦送りベルト２３から横外側に外れて位置する苗ステー５１ｂの支持部材５２から延出して苗Ａに支持作用する長さＬ２より短いように構成してある。
【００３８】
図８に示すように、前記各苗ストッパー６０は、苗載せ台２１の横方向に並ぶ複数のストッパー作用部６０ａを先端側に備える形状に、かつ、各ストッパー作用部６０ａの先端の横幅が基端側の横幅より広くて軽量な割には苗Ａの広い範囲にわたってストップ作用する形状に合成樹脂によって作成し、苗ストッパー６０の基端部の裏面側の苗ストッパー６０の左右方向での中心より左側に位置する二個所に一体形成した取付け部６１と、中心より右側に位置する二個所に一体成形した取付け部６１を前記苗ステー装置５０の前記支持部材５２に回動自在に連結することにより、各ストッパー作用部６０ａが苗載置部２１ａまで下降した作用位置と、苗載置部２１ａから上方に離れた解除位置とに支持部材５２の軸芯まわりで揺動切り換えできるように前記支持部材５２に支持させてある。そして、作用位置にすると、各ストッパー作用部６０ａが前記苗ステー５１ａ，５１ｂどうしの間や、苗ステー５１ｂと苗載せ台２１の仕切り壁部との間でマット状苗Ａの床土部の下端に当接してストップ作用することにより、苗ストッパー６０は、苗植付けを行わせない苗植付機構１４に対応する苗載置部２１ａに在る苗Ａを苗縦送りベルト２３が駆動されても苗供給口２２に縦送りされないようにストップさせる。
【００３９】
図９、図１０に示すように、前記各取付け部６１は、苗ストッパー６０の前後方向に所定の間隔を隔てて並ぶ一対の取付け舌片６１ａで成り、両舌片６１ａの先端側で前記支持部材５２を挟持することにより、苗ストッパー６０を支持部材５２にこの支持部材５２の機体横向きの軸芯まわりで回動自在に連結している。
【００４０】
図８、図９に示すように、各苗ストッパー６０において、苗ストッパー６０の基端部における裏面側の前記左側の２個の取付け部６１と、前記右側の２個の取付け部６１との間の一個所だけに、一対の挟持舌片６２ａを備えるロック部６２を一体成形してある。このロック部６２は、苗ストッパー６０が上昇操作されて前記上昇解除位置になると、これに伴ってロック部６２が前記短尺側の苗ステー５１ａを形成している丸棒部材の前記支持部材５２から上方に突出している部分で成る固定部６３に対してこの固定部６３を一対の挟持舌片６２ａによって挟持する状態に自動的に係合し、この係合によって苗ストッパー６０を上昇解除位置に保持するようにロック状態になり、苗ストッパー６０を上昇解除位置から下降操作すると、この操作力のために一対の挟持舌片６２ａが前記固定部６３から抜け外れることにより、固定部６３から自動的に離脱して苗ストッパー６０の下降を許容するようにロック解除側に切り換わるように構成してある。
【００４１】
図６、図１２などに示すように前記３個の支持体５３の取付けスリット５３ａにわたって取付けた丸棒材でなる苗葉支え６５は、苗載せ台２１の各苗載置部２１ａに載置された苗Ａの葉を、苗植付機構１４の植付け爪１４ａの運動軌跡に入り込まないように受け止め支持させるものである。
【００４２】
つまり、苗植付け作業を行う場合、苗ステー装置５０を下降作用状態に切り換える。すると、各苗載置部２１ａにおいて、３本の苗ステー５１ａ，５１ｂが苗載置部２１ａの上方近くに下降した作用位置になり、マット状苗Ａが苗載置部２１ａから浮き上がって縦送り不良やずれ動きが発生することを回避しながら苗植付機構１４に苗供給できる。このとき、各苗ストッパー６０は、ロック部６２によって上昇解除位置に保持しておく。
【００４３】
一部の苗植付機構１４による苗植付けを停止させながら植付け作業する場合、苗植付けを停止させる苗植付機構１４のための苗載置部２１ａの苗ストッパー６０を下降作用位置に切り換える。すると、苗縦送りベルト２３が駆動されても、マット状苗Ａを苗供給口２２に縦送りされないように苗ストッパー６０によって停止させ、苗植付機構１４が駆動されてもこれによる苗植付けを実行しないようにできる。
【００４４】
苗載せ台２１に苗Ａを供給したり、苗載せ台２１に残った苗Ａを取出したりする場合、苗ステー装置５０を上昇解除状態に切り換える。すると、各苗載置部２１ａの苗ステー５１ａ，５１ｂが上昇解除位置になって苗供給や苗取出しの障害部にならないようにしながら供給や取出し作業できる。
【図面の簡単な説明】
【図１】乗用型田植機全体の側面図
【図２】苗植付機構の平面図
【図３】苗載せ台全体の平面図
【図４】苗載せ台の苗縦送りベルト配設部での断面図
【図５】苗載せ台のガイドレールへの取付け部での断面図
【図６】苗ステーの作用状態の説明図
【図７】苗ステーの解除状態の説明図
【図８】苗ストッパーの平面図
【図９】苗ストッパーの解除状態の説明図
【図１０】苗ストッパーの取付け部の断面図
【図１１】苗載せ台の苗縦送りベルト配設部を示す平面図
【図１２】苗ステーの位置決めアームの作用を示す断面図
【図１３】苗ステー装置の一部を示す斜視図
【符号の説明】
１４苗植付機構
２１苗載せ台
２１ａ苗載置部
２２苗供給口
２３苗縦送りベルト
５１ａ，５１ｂ苗ステー
５２支持部材
５４操作バー
６０苗ストッパー
６１苗ストッパーの取付け部
６２苗ストッパーのロック部
６３固定部
Ｌ１，Ｌ２苗ステーの長さ[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a seedling stage that is reciprocated in the lateral direction of the aircraft in conjunction with the seedling planting movement of the seedling planting mechanism and supplies seedlings to the seedling planting mechanism, and seedlings that are placed on the seedling platform are seeded. The present invention relates to a seedling supply unit structure of a seedling planting device including a seedling vertical feed belt that vertically feeds toward a seedling supply port from which a mechanism extracts seedlings.
[0002]
[Prior art]
  In the above seedling planting device, if the seedling placed on the seedling platform rises from the seedling placement section, it may be difficult to feed the seedling by the seedling vertical feed belt, or the seedling may shift laterally on the seedling platform Trouble occurs easily. For this reason, the seedlings placed on the seedling stage are stopped from above and provided with a plurality of seedling stays arranged in the width direction of the seedling stage, so that the seedlings on the seedling stage rise from the seedling placement part. Configured to suppress.
[0003]
  When the seedling is supplied to the seedling stage or the residual seedling is taken out from the seedling stage, the seedling stay needs to be switched to the release position raised from the seedling stage so as not to become an obstacle. For this reason, conventionally, the seedling stay has been directly held by hand and switched to the action position or the release position.
[0004]
  Moreover, in the conventional seedling planting apparatus, all of the plurality of seedling stays act on the seedling at a site that is laterally removed from the seedling vertical feed belt.
[0005]
  In addition, a seedling stopper that stops seedlings placed on a seedling stand so that they are not vertically fed by a seedling vertical feed belt, for example, when planting work while stopping seedling planting by a part of a plurality of seedling planting mechanisms Even if the seedling planting mechanism is driven, it is possible to prevent seedlings from being supplied to the seedling supply port.
[0006]
  This seedling stopper can be switched between an action position where the seedling stopper descends to the seedling placement part of the seedling platform and stops the seedling, and a release position where the seedling stopper rises from the seedling placement part of the seedling platform and releases the seedling stop. In addition, when switching to the release position, it is necessary to be able to hold the release position so as not to descend from that position. For this reason, conventionally, a pair of left and right mounting portions provided on the base end side of the seedling stopper is attached to the support member so as to be able to swing up and down, and the seedling stopper is supported on the left and right sides and smoothly moves to the operating position and the release position. A pair of left and right locks are provided on the base end side of the seedling stopper, and if the seedling stopper is lifted to the release position, the lock part automatically engages with the fixed part to hold the seedling stopper in the release position. When trying to lower the seedling stopper from the release position, the operating force will cause the lock part to come off the fixed part, and the seedling stopper can be swung without having to act on the locking means or release it. The seedling stopper can be switched between the release position and the action position and can be held in the release position.
[0007]
[Problems to be solved by the invention]
  Conventionally, when the seedling stay is actuated or released, the seedling stay must be directly held and switched, and when the seedling stay is in the working position, it becomes difficult to hold between the leaves of the seedling. This made it difficult to operate. In particular, when switching to the release side, it is necessary to lift the seedling stay from between the leaves, which makes it difficult to operate.
[0008]
  In addition, in the conventional seedling planting device, since all of the plurality of seedling stays act on the seedling at a site that is laterally removed from the seedling vertical feeding belt, a plurality of seedling stays are placed on the seedling placing portion of the seedling placing stand. It was necessary to provide seedling vertical feed belts side by side in the width direction of the seedling platform.
[0009]
  That is, when the seedling stay is located on the laterally outer side of the seedling vertical feed belt, the support of the seedling stay on the seedling vertical feed belt is less likely to be supported by the seedling stay as the lateral width of the seedling vertical feed belt becomes wider. When the seedling vertical feed belt feeds the seedling, the seedling floats up from the belt and easily slips. Further, the narrower the lateral width of the seedling vertical feed belt, the narrower the range of seedlings that can be conveyed by the seedling vertical feed belt. For this reason, a plurality of seedling vertical feed belts with a narrow width are arranged side by side in the width direction of the seedling placement part for the width of the seedling placement part, and the seedling part placed on the belt also has a support action by the seedling stay In addition, it is necessary to make it easy for the seedling vertical feed belt to be conveyed over a wide range in the width direction of the seedling.
[0010]
  In the case of a conventional seedling stopper, when switching the seedling stopper to the operating position or the release position, one of the left and right lock parts is detached from the fixed part, and then the other lock part is detached from the fixed part or engaged. If it is done, the movement of the seedling stopper when the lock is disengaged is not smooth, and the switching operation becomes difficult. In addition, an excessive force acts on the lock portion, so that troubles such as deformation are likely to occur. For this reason, it has been necessary to manufacture and assemble with high accuracy so that the left and right lock portions can be engaged with and disengaged from the fixed portion at the same timing.
  In the case of a conventional seedling stopper, when switching the seedling stopper to the operating position or the release position, one of the left and right lock parts is detached from the fixed part, and then the other lock part is detached from the fixed part or engaged. If it is done, the movement of the seedling stopper when the lock is disengaged is not smooth, and the switching operation becomes difficult. In addition, an excessive force acts on the lock portion, so that troubles such as deformation are likely to occur. For this reason, the right and left lock parts are manufactured accurately so that they can be engaged with and disengaged from the fixed part at the same timingWithIt was necessary to assemble.
[0011]
  The purpose of the present invention is to make it easy to switch the seedling stay to the operating position and the release position, or to prevent the seedling vertical feed and displacement movement with a few seedling vertical feed belts and the lightest seedling stay as much as possible. It is an object of the present invention to provide a seedling supply part structure of a seedling planting device that can be easily and efficiently manufactured and assembled in a state where it can be easily and smoothly switched.
[0012]
[Means for Solving the Problems]
  The configuration, operation, and effect of the invention according to claim 1 are as follows.
[0013]
  〔Constitution〕
  The invention according to claim 1In response to the seedling planting movement of the seedling planting mechanism, the seedling planting mechanism picks up the seedlings that are reciprocated in the lateral direction of the aircraft and supplies the seedlings to the seedling planting mechanism, and the seedling planting mechanism takes out the seedlings placed on the seedling platform. In the seedling feeding part structure of the seedling planting device provided with a seedling vertical feeding belt that feeds vertically toward the seedling feeding port to be carried out, it is possible to suppress the seedling from floating from the seedling placing part of the seedling placing stand and to carry the seedling A plurality of seedling stays arranged in the horizontal direction of the platform are arranged such that some seedling stays are located directly above the seedling vertical feed belt and other seedling stays are located laterally outside the seedling vertical feed belt. , And set in a state of being supported by a single support member in the lateral direction of the seedling platform connected to the base end side of the plurality of seedling stays.In addition, the support member is held by the holding portion at the lowering action position of the seedling stay that suppresses the lifting of the seedling, and is held and held by the support body in the lifted release state in which the seedling stay is moved upward. A positioning arm is provided, and the support member is attached to the support body so that the vertical position of the support member can be freely changed, and the positioning arm is held by the holding portion while the seedling stay is descending at each position in the vertical direction of the support member. Accordingly, the seedling stay is held at the lowering action position.
[0014]
  [Action]
  Since some of the multiple seedling stays are located directly above the seedling vertical feed belt and other seedling stays are located laterally outside the vertical feed belt, the width of the seedling placement section is the seedling vertical feed belt. A wide belt is used for the width of the seedling, and the conveying force by the seedling vertical feed belt is applied over a wide range in the width direction of the seedling while reducing the number of seedling vertical feed belts installed, and the seedlings are fed vertically The seedling stay suppresses the lifting of the seedling from the belt and the seedling placement part that is separated from the seedling vertical feed belt, and supplies the seedling with high precision so that it is difficult to cause a shortage of vertical feeding or slippage due to slippage.it can.
[0015]
  Even if a support reaction force from the seedlings acts on each seedling stay, the positioning arm is held by the holding part at the lowering action position of the seedling stay, so the seedling stay that suppresses the seedling rise is resisted against the seedling support reaction force. Can be held at the lowering action position.
  When the seedling stage is moved upward, the lift release state is greatly separated upward from the seedling placement unit so that the seedling stay is less likely to become an obstacle for seedling supply to the seedling placement unit and removal of seedlings from the seedling placement unit. It becomes.
  The seedling stay is held at the lowering action position by holding the positioning arm on the holding portion in the lowering action state of the seedling stay at each position in the vertical direction of the support member.
[0016]
  〔effect〕
  Therefore, the conveying force of the seedling vertical feed belt is applied over a wide range in the lateral width direction of the seedling, so that the seedling floats up and moves at both the part on the seedling vertical feed belt and the part off the seedling vertical feed belt. The seedling can be supplied accurately to the seedling planting mechanism so that there is no shortage of supply. On the other hand, it is possible to reduce the necessary number by adopting a wide seedling vertical feed belt, and to reduce the weight of the seedling stay as a whole and to reduce the weight and simplify the structure.
[0017]
  Even if the support reaction force from the seedlings acts on each seedling stay, the positioning arm is held by the holding part at the lowering action position of the seedling stay, so the seedling stay is held at the lowering action position against the seedling support reaction force This makes it possible to suppress the seedling from floating.
  If the seedling stage is moved upward, the seedling stay will be in a lift release state that is far away from the seedling placement part, so that it will be an obstacle to supply seedlings to the seedling placement part and to remove seedlings from the seedling placement part. Difficult Yes.
[0018]
  The structure, operation, and effect of the invention according to claim 2 are as follows.
[0019]
  〔Constitution〕
  The invention according to claim 2 is the invention according to claim 1, wherein the length of the seedling stay that supports the seedling of the seedling stay above the seedling vertical feed belt is set on the left and right lateral outer sides of the seedling vertical feed belt. It is shorter than the length that supports the seedling of the seedling stay.
[0020]
  [Action]
  The invention according to claim 2 further provides the following action while having the above action.
  Since the seedling stays enter between the leaves of the seedlings, they are caught by the seedlings and restrain the slippage caused by the sliding of the seedlings. In addition, since the seedling locking protrusion is provided on the surface side of the seedling vertical feed belt on which the seedling is placed so that the seedling does not slip easily, the seedling is separated from the seedling vertical feed belt rather than the part on the seedling vertical feed belt. It will be easy to move in the wrong part. For this reason, in the case where the length of the seedling stay located on the laterally outer side of the seedling vertical feed belt is shortened, the seedling is easily shifted and moved at a portion deviated from the seedling vertical feed belt. If the length of the seedling stay located on the laterally outer side of the seedling vertical feed belt and the length of the seedling stay located above the seedling vertical feed belt are increased, the weight of the entire seedling stay becomes heavy. On the other hand, the length of the seedling stay located above the seedling vertical feed belt is short, and the length of the seedling stay located away from the seedling vertical feed belt is long. On the other hand, it is possible to suppress the shift movement of the seedling on the portion of the seedling vertical feed belt and the shift movement of the portion off the seedling vertical feed belt.
[0021]
  〔effect〕
  Therefore, in the invention of claim 2, any of the part where the seedling is placed on the seedling vertical feed belt and the part where the seedling is separated from the seedling vertical feed belt is applied by applying the conveying force by the seedling vertical feed belt over a wide range in the lateral width direction of the seedling. It is possible to supply the seedlings with high precision so that the seedling planting mechanism does not have a shortage of supply by suppressing the floating and shifting. On the other hand, it is possible to reduce the necessary number by adopting a wide seedling vertical feed belt, and to reduce the weight of the seedling stay as a whole and to reduce the weight and simplify the structure.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
  As shown in FIG. 1, a pair of left and right steering and driveable front wheels 1, a pair of left and right driveable rear wheels 2, a prime mover having an engine 3 located at the front end of the fuselage, and a rear end of the fuselage A seedling planting device 10 is connected to a rear end portion of a body frame 5 of a traveling machine body having a driving part having a driver seat 4 via a link mechanism 6, and an output of the engine 3 of the traveling body is seeded by a rotary shaft 7. In addition to being configured to transmit to the attachment device 10, the link mechanism 6 is swung up and down with respect to the body frame 5 by a lift cylinder 8 connected over the operation unit of the link mechanism 6 and the body frame 5. The seedling planting apparatus 10 is configured to be moved up and down to constitute a riding type rice transplanter.
[0023]
  As shown in FIGS. 1 and 2, the seedling planting device 10 includes a drive case 11 having an input unit coupled to the rotary shaft 7, and extends from the rear part of the drive case 11 to the left and right sides of the machine body. A pipe-made transmission case 12, a planting drive case 13 including a planting drive case 13 having a front end connected to the front ends of the left and right transmission cases 12, and the rear of each planting drive case 13 A seedling planting mechanism 14 that is drivably attached to both lateral sides of the end portion, and a single seedling placement that is positioned in a downwardly inclined posture that is positioned at a lower level toward the rear end side in front of these seedling planting mechanisms 14. A seedling supply unit 20 that supplies seedlings to each seedling planting mechanism 14 by means of a base 21, and is attached to the lower part of the planting machine side by side in the lateral direction of the machine body and before the seedling planting mechanism 14 plantes seedlings in the field. It is configured to level the planting area. It is constituted by a plurality of ground float 15.
[0024]
  Each of the plurality of seedling planting mechanisms 14 includes a planting arm attached over a drive arm 16 supported by the planting drive case 13 so as to freely rotate and a swing link 17 supported so as to swing freely. It is constituted by. A seedling planting claw 14a and a seedling pushing tool are provided on the tip side of the planting arm.
  That is, each seedling planting mechanism 14 passes from the top to the bottom through the seedling supply port 22 where the tip end of the seedling planting claw 14a is located near the lower end of the seedling mounting base 21 to reach the field, and rises from the field to the seedling supply port. A mat-like shape in which a seedling planting claw 14a is mounted on the seedling mount 14 at the seedling supply port 22 is driven by the driving arm 16 so as to rotate up and down while drawing an annular motion trajectory when viewed from the side of the machine body. When one block of block seedling is cut out from the lower end of the seedling A and the seedling planting claw 14a brings this block seedling into the mud of the field, the seedling pushing tool pushes the block seedling out of the seedling planting claw 14a and plantes it. Do the seedling planting exercise.
[0025]
  As shown in FIG. 3, the seedling supply unit 20 includes a plurality of seedling placement units 21 a for individually placing a plurality of mat-like seedlings A supplied to the plurality of seedling planting mechanisms 14. The seedling placing table 21 arranged in the lateral direction, the seedling vertical feed belt 23 provided one by one on the lower end side of each seedling placing part 21a of the seedling placing table 21, and the plurality of seedling placing tables 21 arranged in the lateral direction The seedling stay device 50 having the seedling stays 51a and 51b, a plurality of seedling stoppers 60 arranged in the lateral direction of the seedling placing table 21 above the lower end side of the seedling placing table 21, and the lower end side of the seedling placing table 21 A guide rail 25 and the like in the direction along the horizontal direction of the machine body are provided.
[0026]
  As shown in FIGS. 1, 4, etc., the upper end side of the seedling platform 21 is slidably supported on the upper end side of the column 26 erected on the planting machine body in the lateral direction of the machine body, and the lower end side of the seedling platform 21 Is slidably supported on the guide rail 25. Thereby, the seedling stand 21 is supported so as to move along the guide rail 25 in the lateral direction with respect to the planting machine body.
[0027]
  As shown in FIG. 2 and the like, the seedling platform transport body 27a whose one end is connected to the back surface side of the seedling platform 21 and the other end side of the seedling platform transport body 27a are penetrated and the drive case. A seedling horizontal feed shaft 27b supported in a freely rotating manner by the machine 11 is used to move the seedling placing table 21 back and forth in the horizontal direction in conjunction with the seedling planting movement of each seedling planting mechanism 14. A feed mechanism is configured. That is, the seedling lateral feed shaft 27b is rotationally driven in conjunction with the drive of each seedling planting mechanism 14 by a lateral feed drive mechanism (not shown) located inside the drive case 11. The seedling carrier transport body 27a includes a feed piece body (not shown) that is slidably engaged with a spiral groove 27c provided on the peripheral surface of the seedling lateral feed shaft 27b. When 27b is driven, it is reciprocated along the seedling horizontal feed shaft 27b by this driving force to reciprocate the seedling mount 21.
[0028]
  As shown in FIG. 5, the distal ends of the mounting rods 28 extending from a plurality of locations in the longitudinal direction of the guide rail 25 are attached to a pair of support portions 29 a of a rail support 29 fixed to the planting drive case 13. It is slidably penetrated. Thereby, the guide rail 25 is in a state where it does not move in the lateral direction with respect to the planting machine body and moves in a direction approaching or moving away from the movement locus of the seedling planting claw 14a of each seedling planting mechanism 14. It is supported by the planting machine. The tip end side of the adjustment arm 32 extending from the middle of the seedling amount adjustment shaft 31 made of a round pipe material facing the machine body so as to be rotatable by a bracket 30 provided in the planting machine body is attached to each of the attachments. It is engaged in an adjustment recess located at the base of the heel 28, and in normal times such as planting, the adjustment arm 32 is swung by fixing the seedling adjustment shaft 31 to a predetermined rotational position. The guide rail 25 is fixed at a predetermined mounting position determined by the swinging position of the adjustment arm 32 by locking so as not to occur.
[0029]
  A stopper portion for integrally receiving and supporting a lower end portion of the mat-like seedling A placed on each seedling placing portion 21a of the seedling placing stand 21 by integrally forming an L-shaped plate body portion on the upper end portion of the guide rail 25. 25a is provided, and the seedling supply port 22 is formed by providing a notch in a portion of the stopper portion 25a corresponding to the movement locus of the seedling planting claw 14a of each seedling planting mechanism 14.
[0030]
  As shown in FIG. 4, FIG. 6, etc., the said seedling vertical feed belt 23 located in each seedling mounting part 21a of the seedling mounting stand 21 is on the surface side on which the mat-like seedling A is placed and acts on the seedling A. The seedling locking projections 23a are made of rubber endless belts arranged side by side in both the longitudinal direction and the lateral width direction of the seedling vertical feed belt 23, and the back side of the intermediate portion of the seedling mounting portion 21a in the vertical direction of the seedling mounting base The belt support ring body 33 is provided so as to be freely rotatable, and the belt drive wheel body 34 is provided so as to be driven freely on the back side of the lower end portion of the seedling placement portion 21a. Thus, when the belt drive wheel 34 is driven, the seedling vertical feed belt 23 is driven by the rotational force of the belt drive wheel 34, and the mat-like seedling A of the seedling placement portion 21 a is fed to the seedling supply port 22. Feed vertically. At this time, the seedling locking projection 23a is locked to the floor soil portion of the mat-shaped seedling A to transmit the transfer force, and the mat-shaped seedling A is fed vertically so as not to slip.
[0031]
  Belt drive wheels 34 of all seedling vertical feed belts 23 are attached to a rotary support shaft 35 consisting of a single hexagonal shaft so as to be integrally rotatable. By rotating this rotary support shaft 35, all seedling vertical feed belts are mounted. 23 can be driven. As shown in FIGS. 2 and 5, the one-way rotation clutch 36 attached to the middle of the rotation support shaft 35 and the drive case 11 can be driven and swung via a single rotation support shaft 37. The pair of left and right drive arms 38 supports the seedling longitudinal feed that drives all the seedling longitudinal feed belts 23 in the seedling longitudinal feed direction by a set stroke when the seedling platform 21 reaches the left and right lateral feed stroke ends. A mechanism 39 is configured. That is, the left and right drive arms 38 are driven by a cam type drive mechanism (not shown) located inside the drive case 11 so as to always swing back and forth at a set angle. When the seedling stage 21 reaches the left lateral feed stroke end, the input arm 36a in one rotation direction enters the movement locus of the left drive arm 38, and the seedling stage 21 reaches the right lateral feed stroke end. In this case, the input arm 36a in one rotation direction enters the movement locus of the right drive arm 38, and in either case, the drive arm 38 abuts on the input arm 36a and moves the input arm 36a in the seedling vertical feed direction. Rotate only the set angle. Then, this rotational force is transmitted to the rotation support shaft 35 by the one-rotation direction clutch 36 to drive all the belt drive wheel bodies 34 to the seedling longitudinal feed side. When the drive arm 38 drives the input arm 36a to the seedling vertical feed side and then moves backward, the input arm 36a is rotated in a direction opposite to the seedling vertical feed direction by a restoring spring (not shown) to the standby position. At this time, the one-rotation direction clutch 36 does not transmit the rotational force on the return side of the input arm 36 a to the rotation support shaft 35. For this reason, the seedling vertical feed drive mechanism 39 drives the seedling vertical feed belt 23 only in the rotation direction of the seedling vertical feed.
[0032]
  Thus, when the seedling supply unit 20 places the mat-like seedlings A on the seedling placement units 21a of the seedling placement stand 21, the seedlings A are supplied to the seedling planting mechanisms 14 as follows.
  That is, when each seedling planting mechanism 14 is driven, the seedling platform 21 is reciprocated in the horizontal direction along the guide rail 25 in conjunction with the seedling planting movement of the seedling planting mechanism 14 by the seedling feeding mechanism. Then, a seedling planting claw 14a of each seedling planting mechanism 14 mats one block of seedlings from the lower end portion of the mat-shaped seedling A that is placed on the seedling placement unit 21a for the seedling planting mechanism 14. The mat-like seedlings A of the seedling placement portions 21a are taken out by the seedling placement stand 21 so as to be sequentially cut from the lateral one end side to the other end side of the seedling seedlings A. And reciprocating in the horizontal direction of the machine body with respect to the seedling supply port 22. When the seedling stage 21 reaches the left and right lateral movement stroke end, every seedling vertical feed belt 23 is driven by the seedling vertical feed mechanism 39 to the seedling vertical feed side by a set stroke each time. The mat-like seedling A of the portion 21a is vertically fed by the seedling vertical feeding belt 23 toward the seedling supply port 22 by an amount corresponding to the size in the seedling vertical feeding direction in which the seedling planting mechanism 14 takes out the seedling.
[0033]
  As shown in FIG. 3 and the like, the seedling stay device 50 includes a plurality of seedling stays 51a and 51b and a seedling stand lateral direction connecting the proximal ends of the seedling stays 51a and 51b. The support member 52 is made of a synthetic resin support 53 that is fixed to three portions of both the lateral end and the intermediate portion on the lower end side of the seedling stand 21. The support member 52 is pivotally supported on the seedling stage 21 by being mounted movably, and all the seedling stays 51a and 51b are swung up and down around the axis of the support member 52 in the horizontal direction. In this way, it is supported on the seedling mount 21.
[0034]
  As shown in FIG. 13 and the like, the seedling stay 51b located on the outermost side of the plurality of seedling stays 51a and 51b is connected to the support member 52 from the free end side of the seedling stay 51b and above the seedling stay 51b. An operation bar 54 formed so as to extend over and attached to the seedling stay 51b and the support member 52 is provided, and the left and right operation bars 54 are held to swing up and down around the axis of the support member 52. As shown in FIG. 2, a positioning arm 55 that extends from the left and right ends of the support member 52 so as to be integrally rotatable and that extends into the loop of the support 53 is integrally formed with the support 53 and supported. When entering between the plurality of holding pieces 56 as shown in FIG. 7 and FIG. 12 arranged in the vertical direction of the body 53 and being sandwiched between the holding pieces 56, the seedling stay device 50 is brought into a descending action state. It is configured to so that.
[0035]
  When the seedling stay device 50 is in the descending action state, three seedling stays 51a and 51b are lowered to each seedling placement portion 21a of the seedling placement stand 21, and the three seedling stays 51a and 51b in each seedling placement portion 21a. Is a descending action in which the action part enters between the leaves of the mat-like seedling A on the seedling placement part and is located substantially parallel to the upper surface of the floor soil part near the upper surface of the mat soil seedling A. When the mat-like seedling A tries to float up from the seedling placement portion 21a, it is supported by the action portion on the upper surface of the floor soil portion and does not float until the seedling feed by the seedling vertical feed belt 23 becomes impossible. It is configured to suppress the lifting. At this time, most of the left and right operation bars 54 except the part connected to the seedling stay 51b are exposed upward from the leaves of the mat-shaped seedling A so as to be easy to hold. Further, even if a support reaction force from the seedling A acts on the seedling stays 51a and 51b, the seedling stays 51a and 51b are moved downward against the seedling support reaction force in order to hold the positioning arm 55 by the holding piece 56. Can be retained.
[0036]
  As shown in FIG. 7, when the free end side of the left and right positioning arms 55 hits a part of the support 53, the seedling stay device 50 is in a lift release state. When the seedling stay device 50 is in the lift release state, all the seedling stays 51a and 51b are seedlings so that the action part is not likely to be an obstacle for seedling supply to the seedling placement unit 21a and removal of seedlings from the seedling placement unit 21a. The lift release position is far away from the mounting portion 21a. At this time, the seedling stays 51a and 51b try to descend further due to their own weights. However, since each support 53 stops the positioning arm 55, all the seedling stays 51a and 51b are resisted by their own weights. Can be held in the lift release position.
[0037]
  The seedling stay device 50 is further configured as shown in FIG. That is, among the three seedling stays 51 a and 51 b located on each seedling placement portion 21 a when the seedling stay device 50 is in the activated state, one seedling stay 51 a located at the center is connected to the seedling vertical feed belt 23. The seedling stay 51b located on the both sides of the seedling stay 51b is located immediately above and acts as a stopper on the seedling A. It is. A length L1 that extends from the support member 52 of the seedling stay 51a located directly above the seedling vertical feed belt 23 and supports the seedling A is supported by the seedling stay 51b that is located laterally outside the seedling vertical feed belt 23. The length is set to be shorter than the length L2 extending from the member 52 and supporting the seedling A.
[0038]
  As shown in FIG. 8, each seedling stopper 60 has a shape including a plurality of stopper acting portions 60a arranged in the lateral direction of the seedling mount 21 on the distal end side, and the lateral width of the distal end of each stopper acting portion 60a is based on Although it is wider and lighter than the lateral width on the end side, it is made of synthetic resin into a shape that acts as a stop over a wide range of the seedling A, and from the center in the left-right direction of the seedling stopper 60 on the back side of the base end portion of the seedling stopper 60 By connecting the mounting portion 61 integrally formed at two positions located on the left side and the mounting portion 61 integrally formed at two positions positioned on the right side from the center to the support member 52 of the seedling stay device 50 in a freely rotatable manner. In addition, each stopper action portion 60a can be swingably switched around the axis of the support member 52 between an action position where the stopper action portion 60a is lowered to the seedling placement portion 21a and a release position separated upward from the seedling placement portion 21a. It is then supported by the supporting member 52 as. And when it is in the action position, each stopper action part 60a is located between the seedling stays 51a and 51b, or between the seedling stays 51b and the partition wall part of the seedling stage 21, and the lower end of the floor soil part of the mat-like seedling A Even if the seedling vertical feed belt 23 is driven, the seedling stopper 60 is driven by the seedling stopper 60 that is in the seedling placement portion 21a corresponding to the seedling planting mechanism 14 that does not perform seedling planting. Stop so that it is not fed vertically to the seedling supply port 22.
[0039]
  As shown in FIGS. 9 and 10, each mounting portion 61 is composed of a pair of mounting tongues 61 a arranged at a predetermined interval in the front-rear direction of the seedling stopper 60, and the support member is provided at the tip side of both tongues 61 a. By sandwiching 52, the seedling stopper 60 is connected to the support member 52 so as to be rotatable around the axis of the support member 52 facing the machine body.
[0040]
  As shown in FIGS. 8 and 9, in each seedling stopper 60, between the two left-side mounting portions 61 on the back side and the two right-side mounting portions 61 at the base end portion of the seedling stopper 60. The lock part 62 provided with a pair of clamping tongue pieces 62a is integrally formed at only one place. When the seedling stopper 60 is raised and moved to the lift release position, the locking part 62 is moved from the support member 52 of the round bar member forming the short-side seedling stay 51a. The fixing portion 63, which is an upward projecting portion, is automatically engaged with the fixing portion 63 so as to be clamped by the pair of clamping tongue pieces 62a, and the seedling stopper 60 is held in the lift release position by this engagement. When the seedling stopper 60 is lowered from the ascending release position, the pair of sandwiching tongue pieces 62a are detached from the fixing portion 63 due to this operating force, and automatically from the fixing portion 63. It is configured to switch to the unlocking side so as to allow the seedling stopper 60 to descend and to descend.
[0041]
  As shown in FIGS. 6, 12, etc., the seedling support 65 made of a round bar attached over the attachment slits 53 a of the three supports 53 is placed on each seedling placement portion 21 a of the seedling placement stand 21. The leaves of the seedlings A are received and supported so as not to enter the movement trajectory of the planting claws 14a of the seedling planting mechanism 14.
[0042]
  That is, when seedling planting work is performed, the seedling stay device 50 is switched to the descending action state. Then, in each seedling placement part 21a, the three seedling stays 51a, 51b are in the operating position lowered near the upper part of the seedling placement part 21a, and the mat-like seedling A is lifted from the seedling placement part 21a and vertically fed. It is possible to supply seedlings to the seedling planting mechanism 14 while avoiding the occurrence of defects and displacement. At this time, each seedling stopper 60 is held in the lift release position by the lock portion 62.
[0043]
  When planting while stopping seedling planting by some seedling planting mechanisms 14, the seedling stopper 60 of the seedling placement portion 21a for the seedling planting mechanism 14 for stopping seedling planting is switched to the lowering action position. Then, even if the seedling vertical feed belt 23 is driven, the mat-like seedling A is stopped by the seedling stopper 60 so as not to be vertically fed to the seedling supply port 22, and even if the seedling planting mechanism 14 is driven, seedling planting by this is stopped. You can prevent it from running.
[0044]
  When the seedling A is supplied to the seedling stage 21 or when the seedling A remaining on the seedling stage 21 is taken out, the seedling stay device 50 is switched to the lift release state. As a result, the seedling stays 51a and 51b of the seedling placement units 21a can be supplied and removed while being prevented from being in an ascending release position and becoming an obstacle for seedling supply and seedling removal.
[Brief description of the drawings]
[Figure 1] Side view of the entire riding rice transplanter
[Figure 2] Plan view of the seedling planting mechanism
[Fig. 3] Plan view of the whole seedling stand
FIG. 4 is a cross-sectional view of a seedling vertical feed belt arrangement portion of a seedling mount.
FIG. 5 is a cross-sectional view at a portion where the seedling mount is attached to the guide rail.
FIG. 6 is an explanatory diagram of the action state of the seedling stay
FIG. 7 is an explanatory diagram of a state where the seedling stay is released.
[Fig. 8] Plan view of seedling stopper
FIG. 9 is an explanatory diagram of the state where the seedling stopper is released.
FIG. 10 is a cross-sectional view of a seedling stopper mounting portion.
FIG. 11 is a plan view showing a seedling vertical feed belt arrangement portion of a seedling mount.
FIG. 12 is a sectional view showing the operation of the positioning arm of the seedling stay
FIG. 13 is a perspective view showing a part of the seedling stay device.
[Explanation of symbols]
  14 Seedling planting mechanism
  21 Seedling stand
  21a seedling placement part
  22 Seedling supply port
  23 Seedling vertical feed belt
  51a, 51b Seedling stay
  52 Support members
  54 Operation bar
  60 Seedling stopper
  61 Seedling stopper attachment
  62 Seedling stopper lock
  63 Fixed part
  L1, L2 Seedling stay length

Claims

In conjunction with the seedling planting movement of the seedling planting mechanism (14), the seedling is placed on the seedling platform (21) and the seedling platform (21) which is reciprocated in the lateral direction of the aircraft and supplies seedlings to the seedling planting mechanism (14). In the seedling supply unit structure of the seedling planting device, the seedling planting mechanism (14) includes a seedling vertical feeding belt (23) that vertically feeds the seedling to a seedling supply port (22) from which the seedling planting mechanism (14) takes out the seedling. There,
Part of the plurality of seedling stays (51a) (51b) arranged in the lateral direction of the seedling stage (21) while suppressing the seedling from floating from the seedling stage (21a) of the seedling stage (21) The plurality of seedling stays (51a) are positioned directly above the seedling vertical feed belt (23), and the other seedling stays (51b) are positioned laterally outside the seedling vertical feed belt (51b). this seedlings stay (51a) set in one state of being supported by the support member (52) of the proximal seedling stage connected to side lateral (51b) only, said support member (52), seedlings The support body (53) is held in the holding portion (56) in the lowered action state of the seedling stays (51a) (51b) that suppress the lifting, and the seedling stays (51a) (51b) are moved upward. Positioning that is locked and held in position) The support member (52) is attached to the support body (53) so that the vertical position can be freely changed, and the seedling stay (51a) (at each position in the vertical direction of the support member (52) is provided. Seedling planting, wherein the seedling stays (51a) (51b) are held at the lowering action position by holding the positioning arm (55) on the holding part (56) in the lowering action state of 51b) . Device seedling supply structure.

The length of the seedling stay (51a) positioned above the seedling vertical feed belt (23) is supported by the length of the seedling stay (51b) positioned on both the left and right lateral sides of the seedling vertical feed belt (23). The seedling supply part structure of the seedling planting apparatus according to claim 1, wherein the seedling planting apparatus has a length shorter than a length that supports the seedling .