JP3540968B2

JP3540968B2 - Ridge clutch structure of rice transplanter

Info

Publication number: JP3540968B2
Application number: JP27741799A
Authority: JP
Inventors: 守久保; 登東尾; 邦充牧原; 猛向井
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 1999-09-29
Filing date: 1999-09-29
Publication date: 2004-07-07
Anticipated expiration: 2019-09-29
Also published as: JP2001095329A

Description

【０００１】
【発明の属する技術分野】
本発明は、複数の畦際クラッチレバーによる対応する畦際クラッチの切り換え操作で端数条の植え付けを行えるように構成してある田植機の畦際クラッチ構造に関する。
【０００２】
【従来の技術】
従来、上記のような田植機の畦際クラッチ構造において、フィードケースからの動力を各植付伝動ケースに支持された植付機構に分岐伝達するそれぞれの分岐伝動系に装備した植え付け用の畦際クラッチとしては、例えば、実公平３−５２１７号公報で開示されているように、植付機構側の伝動系であるスプロケットと、このスプロケットに設けた噛合爪に噛合する伝動位置とその噛合爪から離間する非伝動位置とに移動可能で、かつ、伝動位置に復帰付勢されたシフト部材との間に、シフト部材の移動方向と直交する軸心周りに回動操作可能なピン状の操作部材に形成した扁平形状のカム部を介在させ、操作部材の回動操作でシフト部材を非伝動位置に移動させることで、端数条の植え付けを行えるように構成したものがあった。
【０００３】
一方、苗載台の各苗載面に配設される縦送り機構の縦送りベルトのうち、左右一側方から１条目の苗載面に配設される第１縦送りベルトと２条目の苗載面の配設される第２縦送りベルトとの間に縦送り機構の入力部が配設される５条植え用に構成された苗植付装置に装備される縦送り用の畦際クラッチとしては、その入力部から左右に延設された縦送り軸と第１縦送りベルトとの間に介装される縦送り用の第１畦際クラッチと、縦送り軸と第２縦送りベルトとの間に介装される縦送り用の第２畦際クラッチとを、格別の連係ワイヤを介して同じ畦際クラッチレバーに連係することで、この単一の畦際クラッチレバーの操作で、第１畦際クラッチと第２畦際クラッチの切り換え操作を同時に行えるように構成したものがあった。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来技術のうちの前者のものにおいては、シフト部材を操作する操作部材のカム部が扁平形状であることから、そのカム部にシフト部材の操作量を確保しながら長期の使用に耐え得るだけの強度を備えさせるためには、操作部材として大径のものを採用しながらカム部の厚みを厚くする必要が生じるようになる。従って、植え付け用の畦際クラッチにおいて耐久性の向上を図れるようにするためには、植え付け用の畦際クラッチが大型化するとともに製造コストが嵩む不都合を招くようになっていた。
【０００５】
しかも、伝動連結される植付機構側のスプロケットとシフト部材との間にシフト部材を操作する操作部材のカム部を介在させることから、シフト部材を伝動位置に位置させた状態でのカム部に対するスプロケット及びシフト部材の相対回転を良好に行わせるためには、スプロケット、シフト部材、及び操作部材の加工精度や組み付け精度を高める必要が生じ、又、駆動側であるシフト部材の回転に連れて操作部材が回動してシフト部材が不測に非伝動位置に移動する、といった不都合の発生を未然に回避するためには、操作部材の回動軸心から偏心させた位置に扁平形状のカム部を形成する、といった比較的面倒な加工を行う必要があることから、製作にかなりの手間を要するとともに製造コストが更に嵩む不都合を招くようになっていた。
【０００６】
一方、上記従来技術のうちの後者のものにおいては、第１畦際クラッチと第２畦際クラッチとを、それらを同時操作する単一の畦際クラッチレバーに格別の連係ワイヤを介して連係することから、製造コストが嵩む不都合を招くようになり、又、それらの連係ワイヤを込み入った状態となっている苗載台の裏面側に引き回す必要があることから、製作にかなりの手間を招くようになっていた。
【０００７】
本発明の第１の目的は、製作の容易化及び製造コストの低減化を図れるとともに長期の使用に耐え得る耐久性に優れた植え付け用の畦際クラッチを提供できるようにすることにあり、又、第２の目的は、製作の容易化及び製造コストの低減化を図ることのできる縦送り用の畦際クラッチを提供できるようにすることにある。
【０００８】
【課題を解決するための手段】
〔構成〕
上記目的を達成するため、本発明のうちの請求項１記載の発明では、複数の畦際クラッチレバーによる対応する畦際クラッチの切り換え操作で端数条の植え付けを行えるように構成してある田植機の畦際クラッチ構造において、フィードケースからの動力を各植付伝動ケースに支持された植付機構に分岐伝達するそれぞれの分岐伝動系に装備した植え付け用の畦際クラッチを、前記フィードケース側の伝動系に連結される伝動位置と前記フィードケース側の伝動系から離間する非伝動位置とに亘って移動可能で、かつ、前記伝動位置に復帰付勢されたシフト部材と、該シフト部材の移動方向と直交する軸心周りに回動操作可能なピン状の操作部材とから構成し、前記シフト部材の外周には、所定位置に切欠部が形成された第１フランジと、該第１フランジから前記非伝動位置側に所定間隔を隔てる第２フランジとを設け、前記操作部材には、前記切欠部との隣接時においてのみ前記操作部材の前記軸心周りでの回動を許容する状態で前記第１フランジと第２フランジとの間に係入するとともに、前記操作部材の前記軸心周りでの回動に伴って前記シフト部材を前記非伝動位置に押圧操作する半円形状のカム部を形成した。
【０００９】
〔作用〕
上記請求項１記載の発明によると、操作部材を、そのカム部の平滑面が第２フランジに対向するように回動操作すると、シフト部材は、第２フランジがカム部の平滑面に近接してフィードケース側の伝動系に連結される伝動位置に復帰するようになる。この伝動位置において第１フランジがカム部に隣接するようになると、シフト部材の外周に所定間隔を隔てて並設された第１フランジ及び第２フランジによってカム部の姿勢変更が阻止されることから、操作部材の回動操作を確実に不能にすることができるようになり、もって、シフト部材を伝動位置に安定保持することができるようになる。又、伝動位置において切欠部がカム部に隣接するようになると、その切欠部へのカム部の係入が許容されることで操作部材の回動操作が可能となり、操作部材の回動操作が行われると、カム部が、その一端側を切欠部に係入しながら他端側にてシフト部材を非伝動位置に押圧操作する姿勢に姿勢変更するようになり、もって、シフト部材を非伝動位置まで確実に操作することができて、植付機構を切欠部の形成位置に応じた所定の姿勢で停止させることができるようになる。
【００１０】
そして、シフト部材を操作する操作部材のカム部を半円形状にしていることから、前述した従来技術（カム部を扁平形状に形成するもの）のように操作部材として大径のものを採用しなくても、シフト部材の操作量を確保しながら長期の使用に耐え得るだけの高い強度を簡単に備えさせることができるようになる。つまり、操作部材として大径のものを採用することに起因した植え付け用の畦際クラッチの大型化や製造コストの高騰を招くことなく、植え付け用の畦際クラッチにおける耐久性の向上を図れるようになる。
【００１１】
又、カム部が半円形状であることによって、カム部が切欠部に隣接した際にシフト部材の回転に連れて操作部材が回動しようとしても、第１フランジがカム部の湾曲面に接触して操作部材の回動を阻止するようになることから、前述の従来技術のように操作部材の回動軸心から偏心させた位置にカム部を形成するといった面倒な加工を施さなくても、シフト部材の回転に連れて操作部材が回動することに起因したシフト部材の不測の非伝動位置への移動を未然に回避することができるようになり、その分、製作に要する手間や製造コストの削減を図れるようになる。
【００１２】
更に、シフト部材の外周に所定間隔を隔てて並設される第１フランジと第２フランジとの間にシフト部材を操作するカム部を係入させることから、伝動連結される植付機構側のスプロケットとシフト部材との間にシフト部材を操作する操作部材のカム部を介在させる従来技術のものに比較して、高い加工精度や組み付け精度の要する部品点数を少なくすることができるので、その分、製作に要する手間や製造コストを削減することができるようになる。
【００１３】
〔効果〕
従って、製作の容易化及び製造コストの低減化を図れるとともに長期の使用に耐え得る耐久性に優れた植え付け用の畦際クラッチを提供できるようになった。
【００１４】
〔構成〕
本発明のうちの請求項２記載の発明では、上記請求項１記載の発明において、前記分岐伝動系に、所定値以上の負荷が掛かるのに伴って前記植付機構に対する伝動を解除する噛合式のトルクリミッタを装備し、前記トルクリミッタに配設ピッチの異なる３つの噛合爪を形成した。
【００１５】
〔作用〕
近年では、植付機構としてロータリ式のものを採用していることから、トルクリミッタに位相が１８０度異なる２つの噛合爪を形成することによって、いずれかの植付機構がトルクリミッタの作動で一旦停止された場合であっても、その植付機構が再作動する際には、他の植付機構と同期した状態で作動させられるようにすることが考えられているのであるが、２つの噛合爪を形成するだけでは安定した噛合状態が得られ難いことから、噛合部において摩耗を早める籾摺り状の運動が発生し易くなり、結果、トルクリミッタの耐久性の低下を招くようになる。
【００１６】
そこで、上記請求項２記載の発明では、トルクリミッタに配設ピッチの異なる３つの噛合爪を形成するようにしているのであり、これによって、いずれかの植付機構がトルクリミッタの作動で一旦停止された場合であっても、その植付機構が再作動する際には、他の植付機構と同期した状態で作動させることができるようになり、又、トルクリミッタを安定した状態で噛合させることができることから、噛合部において摩耗を早める籾摺り状の運動が発生することを抑制できるようになる。
【００１７】
〔効果〕
従って、トルクリミッタの耐久性の向上を図れるようになった。
【００１８】
〔構成〕
本発明のうちの請求項３記載の発明では、上記請求項１又は２記載の発明において、苗植付装置を、前記植え付け用の畦際クラッチと対応して操作される縦送り用の畦際クラッチを備え、かつ、苗載台の各苗載面に配設される縦送り機構の縦送りベルトのうち、左右一側方から１条目の苗載面に配設される第１縦送りベルトと２条目の苗載面の配設される第２縦送りベルトとの間に縦送り機構の入力部が配設されるとともに、前記縦送り用の畦際クラッチのうち、前記入力部から左右に延設された縦送り軸と前記第１縦送りベルトとの間に介装される縦送り用の第１畦際クラッチと、前記縦送り軸と前記第２縦送りベルトとの間に介装される縦送り用の第２畦際クラッチとを、連係ワイヤを介して単一の畦際クラッチレバーに連係する５条植え用に構成し、前記連係ワイヤを、前記畦際クラッチレバーから前記第２畦際クラッチに亘る第１連係ワイヤと、該第１連係ワイヤにおける第２畦際クラッチ側の端部から前記第１畦際クラッチに亘る第２連係ワイヤとから構成した。
【００１９】
〔作用〕
上記請求項３記載の発明によると、先ず、畦際クラッチレバーを、それから比較的に近い第２畦際クラッチに第１連係ワイヤを介して連係し、その第１連係ワイヤにおける第２畦際クラッチ側の端部を、畦際クラッチレバーから比較的に遠い第１畦際クラッチに第２連係ワイヤを介して連係することで、畦際クラッチレバーによる第２畦際クラッチと第１畦際クラッチとの同時操作を行えるようにしていることから、前述した従来技術のように、第１畦際クラッチと第２畦際クラッチとを、それらを同時操作する単一の畦際クラッチレバーに格別の連係ワイヤを介して連係する構成を採用する場合に比較して、連係ワイヤの長さを短くすることができるので、その分、製造コストを削減することができるようになり、又、連係ワイヤの引き回しを簡単にすることができるので、その分、製作に要する手間を削減することができるようになる。
【００２０】
〔効果〕
従って、製作の容易化及び製造コストの低減化を図ることのできる縦送り用の畦際クラッチを提供できるようになった。
【００２１】
【発明の実施の形態】
図１には田植機の全体側面が示されており、この田植機は、走行機体１の後部に、油圧シリンダ２Ａの作動で昇降揺動するリンク機構２を介して苗植付装置３を昇降自在に連結することによって構成されている。
【００２２】
走行機体１は、その前部に搭載されたエンジン４、エンジン４からの動力が伝達される変速装置５、変速装置５からの変速後の動力が伝達される左右一対の前輪６と後輪７、前輪６に連係されたステアリングホイール８、及び、ステアリングホイール８の後方に配設された運転座席９、などによって乗用型に構成されている。
【００２３】
図１〜５に示すように、苗植付装置３は、左右向きに配設された角パイプ状の支持フレーム１０、支持フレーム１０の中央部に連結されたフィードケース１１、左右方向に所定間隔を隔てる状態で支持フレーム１０から後方に向けて延設された３基の植付伝動ケース１２、左右方向に等間隔を隔てる状態で中央に位置する植付伝動ケース１２の後部右側と左右に位置する植付伝動ケース１２の後部左右両側とに位置するように各植付伝動ケース１２に回転軸１３を介して支持された合計５基のロータリ式の植付機構１４、５条分のマット状苗を載置するように形成された苗載台１５、苗載台１５を各植付機構１４に対して左右方向に一定ストロークで往復移動させる横送り機構１６、苗載台１５がストローク端に到達するごとにマット状苗を縦送りする縦送り機構１７、及び、各植付機構１４による苗植え付け箇所に対して前もって整地作用を施す３基の整地フロート１８、などによって５条分の植え付けを行えるように構成されている。
【００２４】
フィードケース１１は、走行機体１から伝動軸１９を介して伝達された動力を、横送り機構１６の横送り駆動軸１６ａ、縦送り機構１７の縦送り駆動軸１７ａ、及び、各植付伝動ケース１２に支持された植付機構１４に分岐伝達するように各植付伝動ケース１２に内装された分岐伝動系２４の入力軸２６に伝達するように構成されている。
【００２５】
図６に示すように、各分岐伝動系２４は、各入力軸２６に装着されるトルクリミッタ２７、各回転軸１３に装着される植え付け用の畦際クラッチ２８、及び、トルクリミッタ２７から畦際クラッチ２８に減速伝動するチェーン式減速機構２９、などによって構成されている。
【００２６】
図４及び図９に示すように、トルクリミッタ２７は、各入力軸２６に相対摺動可能な状態でスプライン嵌合されたシフト部材２７Ａ、各入力軸２６に相対摺動不能な状態で遊嵌された回転体２７Ｂ、及び、シフト部材２７Ａを回転体２７Ｂに向けて押圧付勢するバネ２７Ｃ、などによって構成されており、バネ２７Ｃの押圧でシフト部材２７Ａの左側面に形成された３つの噛合爪２７ａが回転体２７Ｂの右側面に形成された３つの噛合爪２７ｂと噛合することによって植付機構１４に伝動するようになっている。各噛合爪２７ａ，２７ｂには、植付機構１４の他物との接触などによって分岐伝動系２４に所定値以上の負荷が掛かるのに伴って、バネ２７Ｃの付勢に抗してシフト部材２７Ａ側の噛合爪２７ａを回転体２７Ｂ側の噛合爪２７ｂに乗り上げさせることで植付機構１４への伝動を解除する乗り上がり傾斜面ａ，ｂが形成されており、これによって、分岐伝動系２４に所定値以上の負荷が掛かっているにもかかわらず、植付機構１４への伝動を継続させることに起因した植付機構１４や分岐伝動系２４などの破損を回避できるようになっている。又、各シフト部材２７Ａ及び回転体２７Ｂは、所定の回転位相でしか伝動連結されないように３つの噛合爪２７ａ，２７ｂがそれぞれ異なる配設ピッチで形成されており、これによって、いずれかの植付機構１４がトルクリミッタ２７の作動で一旦停止された場合であっても、その植付機構１４が再作動する際には、他の植付機構１４と同期した状態で作動させることができるようになっている。
【００２７】
図４〜８に示すように、植え付け用の畦際クラッチ２８は、フィードケース１１側の伝動系となるように回転軸１３に相対摺動不能な状態で遊嵌された回転体２８Ａ、回転軸１３に相対摺動可能な状態でスプライン嵌合されたシフト部材２８Ｂ、シフト部材２８Ｂの移動方向と直交する軸心Ｐ周りに回動操作可能なピン状の操作部材２８Ｃ、及び、シフト部材２８Ｂを回転体２８Ａに向けて押圧付勢するバネ２８Ｄ、などによって構成されている。
【００２８】
図４及び図５に示すように、チェーン式減速機構２９は、トルクリミッタ２７の回転体２７Ｂに溶接された小径の駆動スプロケット２９Ａ、植え付け用の畦際クラッチ２８の回転体２８Ａに溶接された大径の従動スプロケット２９Ｂ、及び、それらのスプロケット２９Ａ，２９Ｂに亘って巻き掛けられた伝動チェーン２９Ｃ、などによって、フィードケース１１からの動力を１／２に減速するように構成されている。
【００２９】
植え付け用の畦際クラッチ２８の構成について詳述すると、図３〜８に示すように、回転体２８Ａの右側面とシフト部材２８Ｂの左側面のそれぞれには、シフト部材２８Ｂの伝動位置への移動に伴って噛合連結され、かつ、シフト部材２８Ｂの非伝動位置への移動に伴って噛合連結が解除される一対の噛合爪２８ａ，２８ｂが形成されている。シフト部材２８Ｂの外周には、１８０度位相を異ならせた所定位置に切欠部２８ｃが形成された第１フランジ２８ｄと、第１フランジ２８ｄから非伝動位置側に所定間隔を隔てるとともに第１フランジ２８ｄよりも突出量の大きい第２フランジ２８ｅとが形成されている。操作部材２８Ｃの下端には、切欠部２８ｃとの隣接時においてのみ操作部材２８Ｃの軸心Ｐ周りでの回動を許容する状態で第１フランジ２８ｄと第２フランジ２８ｅとの間に係入するとともに、操作部材２８Ｃの軸心Ｐ周りでの回動に伴ってシフト部材２８Ｂをバネ２８Ｄの付勢に抗して非伝動位置に押圧操作する半円形状で段付きのカム部２８ｆが形成されている。操作部材２８Ｃの上部には、苗載台１５の裏面上部に並設された３本の畦際クラッチレバー３０のうちの対応するものに連係ワイヤ３１及び蓄力バネ３２を介して連係される操作アーム２８Ｅが溶接されるとともに、操作部材２８Ｃを、そのカム部２８ｆの平滑面ｃが第２フランジ２８ｅに対向する操作位置に向けて復帰付勢する復帰バネ２８Ｆが外嵌されている。
【００３０】
以上の構成から、植え付け用の各畦際クラッチ２８は、対応する畦際クラッチレバー３０が切り位置から入り位置に操作されると、復帰バネ２８Ｆの作用によって、操作部材２８Ｃが、そのカム部２８ｆの平滑面ｃが第２フランジ２８ｅに対向する操作位置まで回動操作され、かつ、バネ２８Ｄの作用によって、シフト部材２８Ｂが、その第２フランジ２８ｅがカム部２８ｆの平滑面ｃに近接するとともに、その噛合爪２８ｂが回転体２８Ａの噛合爪２８ａに噛合する伝動位置まで操作されるようになっており、もって、対応する植付機構１４に対する伝動状態が現出されるようになっている。そして、この伝動状態の現出に伴ってシフト部材２８Ｂが回転することで第１フランジ２８ｄがカム部２８ｆの湾曲面ｄに隣接するようになると、シフト部材２８Ｂの外周に所定間隔を隔てて並設された第１フランジ２８ｄ及び第２フランジ２８ｅによってカム部２８ｆの姿勢変更が阻止されることから、操作部材２８Ｃの回動操作を確実に不能にすることができるようになり、もって、シフト部材２８Ｂを伝動位置に安定保持することができるようになっている。
【００３１】
又、対応する畦際クラッチレバー３０が入り位置から切り位置に操作されると、切欠部２８ｃがカム部２８ｆの湾曲面ｄに隣接するまでの間は蓄力バネ３２に操作力が蓄えられ、切欠部２８ｃがカム部２８ｆの湾曲面ｄに隣接すると、その切欠部２８ｃへのカム部２８ｆの係入が許容されて操作部材２８Ｃの回動操作が可能になることから、蓄力バネ３２の作用による操作部材２８Ｃの回動操作が開始されて、カム部２８ｆが、その一端側を切欠部２８ｃに係入しながら他端側にてシフト部材２８Ｂを非伝動位置に押圧操作する姿勢に姿勢変更するようになり、もって、シフト部材２８Ｂを、その噛合爪２８ｂが回転体２８Ａの噛合爪２８ａから離間する非伝動位置まで確実に操作することができて、対応する植付機構１４を切欠部２８ｃの形成位置に応じた所定の姿勢、つまり、植付機構１４に装備された一対の植付爪１４Ａが圃場及び苗載台１５から離間する姿勢で停止させることができるようになっている。
【００３２】
図２及び図３に示すように、横送り機構１６は、苗載台１５に連結された移動体１６ｂに内装されたコマ部材（図示せず）を、横送り駆動軸１６ａの回転に伴って、横送り駆動軸１６ａに形成された無端の螺旋溝１６ｃにてネジ送りすることで、苗載台１５を左右方向に一定ストロークで往復移動させることができるようになっている。
【００３３】
図２、図３、図１０及び図１１に示すように、縦送り機構１７は、苗載台１５の各苗載面１５Ａａ〜１５Ａｅに一対ずつ配設される第１縦送りベルト１７Ａａ〜第５縦送りベルト１７Ａｅ、右側方から１条目の苗載面１５Ａａに配設される第１縦送りベルト１７Ａａと２条目の苗載面１５Ａｂに配設される第２縦送りベルト１７Ａｂとの間に配設される入力部１７Ｂ、入力部１７Ｂから左右に向けて延設された６角軸からなる縦送り軸１７Ｃ、縦送り軸１７Ｃに相対回転自在に外嵌されるとともに右側方から１条目の苗載面１５Ａａに配設された一対の第１縦送りベルト１７Ａａを連動連結する第１筒軸１７Ｄａ、縦送り軸１７Ｃに相対回転自在に外嵌されるとともに右側方から２条目の苗載面１５Ａｂに配設された一対の第２縦送りベルト１７Ａｂを連動連結する第２筒軸１７Ｄｂ、縦送り軸１７Ｃに相対回転自在に外嵌されるとともに右側方から３条目（左右中央）の苗載面１５Ａｃに配設された一対の第３縦送りベルト１７Ａｃを連動連結する第３筒軸１７Ｄｃ、縦送り軸１７Ｃに相対回転自在に外嵌されるとともに右側方から４条目と５条目の各苗載面１５Ａｄ，１５Ａｅに配設される第４縦送りベルト１７Ａｄと第５縦送りベルト１７Ａｅとを連動連結する第４筒軸１７Ｄｄ、縦送り軸１７Ｃと第１縦送りベルト１７Ａａとの間に介装される縦送り用の第１畦際クラッチ１７Ｅａ、縦送り軸１７Ｃと第２縦送りベルト１７Ａｂとの間に介装される縦送り用の第２畦際クラッチ１７Ｅｂ、縦送り軸１７Ｃと第３縦送りベルト１７Ａｃとの間に介装される縦送り用の第３畦際クラッチ１７Ｅｃ、及び、縦送り軸１７Ｃと第５縦送りベルト１７Ａｅとの間に介装される縦送り用の第４畦際クラッチ１７Ｅｄ、などによって構成されている。
【００３４】
入力部１７Ｂは、縦送り駆動軸１７ａに所定間隔を隔てて並設された一対の駆動アーム１７ｂが、苗載台１５が左右のストローク端に到達するごとに、縦送り軸１７Ｃにワンウェイクラッチ１７ｃを介して装備された操作アーム１７ｄを蹴り上げ操作することで、縦送り軸１７Ｃを間欠的に回転させるように構成されている。
【００３５】
上記の構成から、縦送り機構１７は、苗載台１５が左右のストローク端に到達するごとに各苗載面１５ａ〜１５Ａｅに載置されたマット状苗を所定量ずつ縦送りすることできるようになっている。
【００３６】
図３及び図１１に示すように、縦送り用の第１畦際クラッチ１７Ｅａと第２畦際クラッチ１７Ｅｂは、連係ワイヤ３３及びシフトフォーク３４を介して右側に配設された畦際クラッチレバー３０に連係されている。縦送り用の第３畦際クラッチ１７Ｅｃは、連係ワイヤ３５及びシフトフォーク３４を介して左右中央に配設された畦際クラッチレバー３０に連係されている。縦送り用の第４畦際クラッチ１７Ｅｄは、連係ワイヤ３５及びシフトフォーク３４を介して左側に配設された畦際クラッチレバー３０に連係されている。つまり、右側の畦際クラッチレバー３０の操作によって、縦送り用の第１畦際クラッチ１７Ｅａと第２畦際クラッチ１７Ｅｂとを同時に切り換え操作することができて、第１縦送りベルト１７Ａａ及び第２縦送りベルト１７Ａｂに対する伝動状態を切り換えられるようになり、左右中央の畦際クラッチレバー３０の操作によって、縦送り用の第３畦際クラッチ１７Ｅａを切り換え操作することができて、第３縦送りベルト１７Ａｃに対する伝動状態を切り換えられるようになり、左側の畦際クラッチレバー３０の操作によって、縦送り用の第４畦際クラッチ１７Ｅｄを切り換え操作することができて、第４縦送りベルト１７Ａｄ及び第５縦送りベルト１７Ａｅに対する伝動状態を切り換えられるようになっている。
【００３７】
図１２にも示すように、縦送り用の第１畦際クラッチ１７Ｅａ及び第２畦際クラッチ１７Ｅｂを右側の畦際クラッチレバー３０に連係する連係ワイヤ３３は、畦際クラッチレバー３０から第２畦際クラッチ１７Ｅｂに亘る第１連係ワイヤ３３Ａと、第１連係ワイヤ３３Ａにおける第２畦際クラッチ１７Ｅｂ側の端部から第１畦際クラッチ１７Ｅａに亘る第２連係ワイヤ３３Ｂとから構成されている。尚、図１１及び図１２に示す符号３６は、第２連係ワイヤ３３Ｂを第１畦際クラッチ１７Ｅａに向けて案内するガイド部材である。
【００３８】
要するに、以上の構成によって、右側の畦際クラッチレバー３０のみを切り位置に操作すると、右側２条分の植付作動を停止させることができて左側３条分の端数条植えを行えるようになり、又、右側と左右中央の各畦際クラッチレバー３０を切り位置に操作すると、右側３条分の植付作動を停止させることができて左側２条分の端数条植えを行えるようになり、逆に、左側の畦際クラッチレバー３０のみを切り位置に操作すると、左側２条分の植付作動を停止させることができて右側３条分の端数条植えを行えるようになり、又、左側と左右中央の各畦際クラッチレバー３０を切り位置に操作すると、左側３条分の植付作動を停止させることができて右側２条分の端数条植えを行えるようになっている。
【図面の簡単な説明】
【図１】田植機の全体側面図
【図２】苗植付装置の正面図
【図３】畦際クラッチの操作構造を示す苗植付装置の概略平面図
【図４】分岐伝動系の構成を示す要部の横断平面図
【図５】植え付け用の畦際クラッチの操作状態を示す要部の縦断背面図
【図６】植え付け用の畦際クラッチの構成を示す要部の分解斜視図
【図７】植え付け用の畦際クラッチの構成を示す要部の縦断側面図
【図８】植え付け用の畦際クラッチの操作状態を示す要部の横断平面図
【図９】トルクリミッタにおけるシフト部材及び回転体の側面図
【図１０】縦送り機構の入力部の構成を示す要部の縦断側面図
【図１１】縦送り用の畦際クラッチの連係構成を示す要部の正面図
【図１２】連係ワイヤの構成を示す要部の斜視図
【符号の説明】
３苗植付装置
１１フィードケース
１２植付伝動ケース
１４植付機構
１５苗載台
１５Ａａ〜１５Ａｅ苗載面
１７縦送り機構
１７Ａａ〜１７Ａｅ縦送りベルト
１７Ｂ入力部
１７Ｃ縦送り軸
１７Ｅａ縦送り用の第１畦際クラッチ
１７Ｅｂ縦送り用の第２畦際クラッチ
１７Ｅｃ縦送り用の第３畦際クラッチ
１７Ｅｄ縦送り用の第４畦際クラッチ
２４分岐伝動系
２７トルクリミッタ
２７ａ噛合爪
２７ｂ噛合爪
２８植え付け用の畦際クラッチ
２８Ａ伝動系
２８Ｂシフト部材
２８Ｃ操作部材
２８ｃ切欠部
２８ｄ第１フランジ
２８ｅ第２フランジ
２８ｆカム部
３０畦際クラッチレバー
３３連係ワイヤ
３３Ａ第１連係ワイヤ
３３Ｂ第２連係ワイヤ
Ｐ軸心[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a ridge-side clutch structure of a rice transplanter, which is configured so that a plurality of ridge-side clutch levers can be used to switch a corresponding ridge-side clutch to perform planting of a few rows.
[0002]
[Prior art]
Conventionally, in a ridge-side clutch structure of a rice transplanter as described above, a ridge for planting provided for each branch transmission system that branches and transmits power from a feed case to a planting mechanism supported by each planting transmission case. As disclosed in, for example, Japanese Utility Model Publication No. 3-5217, a sprocket, which is a transmission system on the side of the planting mechanism, and a transmission position meshing with a meshing claw provided on the sprocket and a meshing claw thereof are used. A pin-shaped operating member movable to a separated non-transmission position and rotatable about an axis orthogonal to the moving direction of the shift member between the shift member and the shift member urged to return to the transmission position. There has been a configuration in which a few cams can be planted by interposing a flat cam portion formed as described above and moving the shift member to a non-transmission position by rotating the operation member.
[0003]
On the other hand, of the vertical feed belts of the vertical feed mechanism provided on each seedling mounting surface of the seedling mounting table, the first vertical feed belt provided on the first row of seedling mounting surfaces from the left and right sides and the second feed belt An input section of a vertical feed mechanism is disposed between the second vertical feed belt on which the seedling mounting surface is disposed and a ridge for vertical feed provided in a seedling planting apparatus configured for five-row planting. As the clutch, a first ridge-side clutch for longitudinal feed interposed between a longitudinal feed shaft and a first longitudinal feed belt extending right and left from an input portion thereof, a longitudinal feed shaft and a second longitudinal feed By linking the second ridge clutch for vertical feeding interposed between the belt and the same ridge clutch lever via a special linking wire, the operation of this single ridge clutch lever can be performed. In some cases, the switching operation between the first ridge-side clutch and the second ridge-side clutch can be performed simultaneously.
[0004]
[Problems to be solved by the invention]
However, in the former of the prior arts described above, since the cam portion of the operation member for operating the shift member has a flat shape, the cam portion can withstand a long-term use while securing the operation amount of the shift member. In order to provide sufficient strength, it is necessary to increase the thickness of the cam portion while employing a large-diameter operation member. Therefore, in order to improve the durability of the planting ridge clutch, the planting ridge clutch becomes large and disadvantageously increases the manufacturing cost.
[0005]
In addition, since the cam portion of the operating member for operating the shift member is interposed between the sprocket on the side of the planting mechanism and the shift member to which the transmission member is connected, the cam member in the state where the shift member is located at the transmission position. In order to make the relative rotation of the sprocket and the shift member favorable, it is necessary to increase the processing accuracy and the assembling accuracy of the sprocket, the shift member, and the operating member, and the operation is performed along with the rotation of the shift member on the driving side. In order to avoid inconvenience such as the member rotating and the shift member unexpectedly moving to the non-transmission position, a flat cam portion is provided at a position eccentric from the rotation axis of the operation member. Since it is necessary to perform a relatively complicated process such as forming, a considerable labor is required for the production and a problem that the production cost is further increased has been caused.
[0006]
On the other hand, in the latter of the above-mentioned prior arts, the first ridge clutch and the second ridge clutch are linked via a special linking wire to a single ridge clutch lever that operates them simultaneously. As a result, the production cost is disadvantageously increased, and since it is necessary to route those linking wires to the back side of the seedling mounting table which is in a complicated state, a considerable amount of time is required for production. Had become.
[0007]
A first object of the present invention is to provide a planting ridge clutch for planting which can be manufactured easily and reduce the manufacturing cost and which is durable and can withstand long-term use. A second object of the present invention is to provide a ridge-side clutch for longitudinal feed, which can facilitate the production and reduce the production cost.
[0008]
[Means for Solving the Problems]
〔Constitution〕
In order to achieve the above object, in the invention according to claim 1 of the present invention, a rice transplanter configured to be able to plant a fraction of a row by switching operation of a corresponding ridge-side clutch by a plurality of ridge-side clutch levers. In the ridge-side clutch structure of the above, the ridge-side clutch for planting, which is provided in each branch transmission system that branches and transmits the power from the feed case to the planting mechanism supported by each planting transmission case, is provided on the feed case side. A shift member movable between a transmission position connected to a transmission system and a non-transmission position separated from the transmission system on the feed case side, and urged to return to the transmission position; and movement of the shift member. A first flange having a notch formed at a predetermined position on an outer periphery of the shift member, the first flange comprising a pin-shaped operation member rotatable around an axis perpendicular to the direction; A second flange is provided at a predetermined distance from one flange to the non-transmission position side, and the operation member allows the operation member to rotate around the axis only when adjacent to the cutout portion. A semi-circular shape which engages between the first flange and the second flange in a state and presses the shift member to the non-transmission position with rotation of the operation member around the axis. A cam portion was formed.
[0009]
[Action]
According to the first aspect of the present invention, when the operating member is rotated so that the smooth surface of the cam portion faces the second flange, the shift member moves the second flange close to the smooth surface of the cam portion. As a result, it returns to the transmission position connected to the transmission system on the feed case side. When the first flange is adjacent to the cam portion at this transmission position, the change in the posture of the cam portion is prevented by the first flange and the second flange arranged side by side at a predetermined interval on the outer periphery of the shift member. Thus, the rotation operation of the operation member can be reliably disabled, so that the shift member can be stably held at the transmission position. Further, when the notch portion is adjacent to the cam portion at the transmission position, the cam portion can be engaged with the notch portion so that the turning operation of the operating member becomes possible, and the turning operation of the operating member becomes impossible. When this is performed, the cam portion changes its posture to a posture in which the shift member is pressed to the non-transmission position at the other end while engaging one end of the shift member with the notch portion. The operation can be reliably performed up to the position, and the planting mechanism can be stopped at a predetermined posture corresponding to the formation position of the notch.
[0010]
Since the cam portion of the operation member for operating the shift member is formed in a semicircular shape, a large-diameter operation member is employed as in the above-described related art (the cam portion is formed in a flat shape). Even without this, it is possible to easily provide high strength enough to withstand long-term use while securing the operation amount of the shift member. In other words, it is possible to improve the durability of the ridge-side clutch for planting without increasing the size of the ridge-side clutch for planting and increasing the manufacturing cost due to the adoption of a large-diameter operating member. Become.
[0011]
In addition, since the cam portion has a semicircular shape, the first flange contacts the curved surface of the cam portion even when the operation member attempts to rotate with the rotation of the shift member when the cam portion is adjacent to the notch portion. As a result, since the rotation of the operation member is prevented, it is not necessary to perform a troublesome process such as forming a cam portion at a position eccentric from the rotation axis of the operation member as in the above-described related art. In addition, it is possible to prevent the shift member from being unexpectedly moved to the non-transmission position due to the rotation of the operation member with the rotation of the shift member. The cost can be reduced.
[0012]
Further, since the cam portion for operating the shift member is engaged between the first flange and the second flange which are arranged side by side at a predetermined interval on the outer periphery of the shift member, the side of the planting mechanism to which the transmission mechanism is connected is connected. Compared with the prior art in which the cam portion of the operating member for operating the shift member is interposed between the sprocket and the shift member, the number of parts requiring high machining accuracy and assembly accuracy can be reduced, and accordingly, Therefore, it is possible to reduce labor and manufacturing cost required for manufacturing.
[0013]
〔effect〕
Therefore, it has become possible to provide a ridge-side clutch for planting, which can be manufactured easily and reduce the manufacturing cost, and has excellent durability that can withstand long-term use.
[0014]
〔Constitution〕
According to a second aspect of the present invention, in the first aspect of the present invention, a meshing type for canceling transmission to the planting mechanism when a load of a predetermined value or more is applied to the branch transmission system. And three interlocking claws having different arrangement pitches are formed on the torque limiter.
[0015]
[Action]
In recent years, since a rotary type is used as the planting mechanism, one of the planting mechanisms is once operated by the operation of the torque limiter by forming two interlocking claws having a phase difference of 180 degrees in the torque limiter. It is considered that even when the planting mechanism is stopped, when the planting mechanism is operated again, the planting mechanism can be operated in synchronization with another planting mechanism. Since it is difficult to obtain a stable meshing state only by forming the claws, a hulling-like movement that accelerates wear at the meshing portion is likely to occur, and as a result, the durability of the torque limiter is reduced.
[0016]
Therefore, according to the second aspect of the present invention, the torque limiter is formed with three meshing claws having different arrangement pitches, whereby one of the planting mechanisms is temporarily stopped by the operation of the torque limiter. Even when the planting mechanism is operated again, it can be operated in synchronization with another planting mechanism, and the torque limiter can be meshed in a stable state. Therefore, it is possible to suppress the occurrence of a hulling-like movement that accelerates abrasion in the meshing portion.
[0017]
〔effect〕
Therefore, the durability of the torque limiter can be improved.
[0018]
〔Constitution〕
According to the third aspect of the present invention,In the invention of claim 1 or 2,Seedling planting equipment,A ridgeline clutch for longitudinal feed operated corresponding to the ridgeline clutch for planting, andAmong the vertical feed belts of the vertical feed mechanism provided on each seedling mounting surface of the seedling mounting table, the first vertical feed belt provided on the first row of seedling mounting surfaces from the left and right one side and the second row of seedling mounting The input section of the vertical feed mechanism is disposed between the second vertical feed belt on which the surface is disposed, andOf the vertical feed ridge side clutch,A first ridge clutch for longitudinal feed interposed between a vertical feed shaft extending left and right from the input unit and the first vertical feed belt, the vertical feed shaft and the second vertical feed belt And a second ridge-side clutch for longitudinal feed interposed between the ridge and the second ridge-side clutch for five-row planting linked to a single ridge-side clutch lever via a linking wire. A first linking wire extending from the second clutch lever to the second ridge-side clutch, and a second linking wire extending from the end of the first linking wire on the second ridge-side clutch side to the first ridge-side clutch. .
[0019]
[Action]
According to the third aspect of the present invention, first, the ridge-side clutch lever is linked to the second ridge-side clutch relatively close to the ridge-side clutch via the first linking wire, and the second ridge-side clutch on the first linking wire. By connecting the end on the side to the first ridge-side clutch relatively far from the ridge-side clutch lever via a second linking wire, the second ridge-side clutch and the first ridge-side clutch by the ridge-side clutch lever are connected. As described in the related art, the first ridge-side clutch and the second ridge-side clutch are specially linked to a single ridge-side clutch lever that simultaneously operates them. Since the length of the linking wire can be shortened as compared with a case where the linking is performed via the wire, the manufacturing cost can be reduced accordingly, and the pulling of the linking wire can be achieved. Times It is possible to simplify the, correspondingly, it is possible to reduce the labor required for manufacture.
[0020]
〔effect〕
Therefore, it has become possible to provide a ridge-side clutch for longitudinal feed, which can facilitate the production and reduce the production cost.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows the entire side surface of a rice transplanter. This rice transplanter raises and lowers a seedling planting device 3 at a rear portion of a traveling machine body 1 via a link mechanism 2 which moves up and down by operation of a hydraulic cylinder 2A. It is constituted by freely connecting.
[0022]
The traveling body 1 includes an engine 4 mounted on a front portion thereof, a transmission 5 to which power from the engine 4 is transmitted, a pair of left and right front wheels 6 and a rear wheel 7 to which power after shifting from the transmission 5 is transmitted. , A steering wheel 8 linked to the front wheel 6, and a driver's seat 9 disposed behind the steering wheel 8, are configured as a riding type.
[0023]
As shown in FIGS. 1 to 5, the seedling planting device 3 includes a square pipe-shaped support frame 10 arranged in the left-right direction, a feed case 11 connected to the center of the support frame 10, and a predetermined space in the left-right direction. Three planting transmission cases 12 extending rearward from the support frame 10 in a state in which the planting transmission case 12 is located at the center of the planting transmission case 12 at equal intervals in the left-right direction and located at the rear right and left and right. A total of five rotary-type planting mechanisms 14 supported on each planting transmission case 12 via a rotating shaft 13 so as to be located on the left and right sides of the rear of the planting transmission case 12. The seedling mounting table 15 formed so as to mount the seedlings, the lateral feed mechanism 16 for reciprocating the seedling mounting table 15 in a constant stroke in the left-right direction with respect to each planting mechanism 14, and the seedling mounting table 15 at the stroke end. Matte seedlings Longitudinal feeding mechanism 17 for feeding, and are configured to allow the planting of Article 5 min the like ground leveling float 18, the 3 groups performing leveling action previously with respect to seedling planting places due to the planting mechanism 14.
[0024]
The feed case 11 transfers the power transmitted from the traveling machine body 1 via the transmission shaft 19 to the horizontal feed drive shaft 16a of the horizontal feed mechanism 16, the vertical feed drive shaft 17a of the vertical feed mechanism 17, and each planted transmission case. The transmission is transmitted to an input shaft 26 of a branch transmission system 24 installed in each planting transmission case 12 so as to branch and transmit to the planting mechanism 14 supported by the plant 12.
[0025]
As shown in FIG. 6, each branch transmission system 24 includes a torque limiter 27 mounted on each input shaft 26, a planting ridge clutch 28 mounted on each rotating shaft 13, and a ridge from the torque limiter 27. It is constituted by a chain-type speed reduction mechanism 29 that transmits a speed reduction to the clutch 28, and the like.
[0026]
As shown in FIGS. 4 and 9, the torque limiter 27 has a shift member 27 A spline-fitted to each input shaft 26 so as to be relatively slidable, and loosely fits to each input shaft 26 in a state where the input shaft 26 is not slidable. And a spring 27C that presses and biases the shift member 27A toward the rotary member 27B. The three meshes formed on the left side surface of the shift member 27A by the pressing of the spring 27C. The pawl 27a is transmitted to the planting mechanism 14 by meshing with three meshing claws 27b formed on the right side surface of the rotating body 27B. When a load of a predetermined value or more is applied to the branch transmission system 24 due to contact with another object of the planting mechanism 14 or the like, the shift members 27A are pressed against the meshing claws 27a and 27b against the bias of the spring 27C. The climbing inclined surfaces a and b are formed to release the transmission to the planting mechanism 14 by causing the engaging claw 27a on the side to ride on the engaging claw 27b on the rotating body 27B side. Even if a load equal to or greater than a predetermined value is applied, damage to the planting mechanism 14, the branch transmission system 24, and the like due to continuing transmission to the planting mechanism 14 can be avoided. The shift members 27A and the rotating body 27B are formed with three engaging claws 27a and 27b at different disposition pitches so that they can be transmitted and connected only in a predetermined rotation phase. Even when the mechanism 14 is temporarily stopped by the operation of the torque limiter 27, when the planting mechanism 14 is restarted, it can be operated in synchronization with the other planting mechanisms 14. Has become.
[0027]
As shown in FIGS. 4 to 8, the planting ridge-side clutch 28 includes a rotating body 28 A loosely fitted to the rotating shaft 13 in a non-slidable manner so as to be a transmission system on the feed case 11 side. 13, a shift member 28B spline-fitted in a state capable of sliding relative to the pin 13, a pin-shaped operation member 28C rotatable about an axis P orthogonal to the moving direction of the shift member 28B, and a shift member 28B. It is constituted by a spring 28D that urges against the rotating body 28A.
[0028]
As shown in FIGS. 4 and 5, the chain-type speed reduction mechanism 29 includes a small-diameter drive sprocket 29A welded to the rotating body 27B of the torque limiter 27 and a large-diameter welding body 28A welded to the ridge-side clutch 28 for planting. A driven sprocket 29B having a diameter and a transmission chain 29C wound around the sprockets 29A and 29B are configured to reduce the power from the feed case 11 to 1/2.
[0029]
3 to 8, the right side of the rotating body 28A and the left side of the shift member 28B are moved to the transmission position of the shift member 28B, as shown in FIGS. A pair of meshing claws 28a and 28b are formed so as to be meshed and connected with the shift member 28B and to be released with the shift of the shift member 28B to the non-transmission position. A first flange 28d having a notch 28c formed at a predetermined position 180 degrees out of phase on the outer periphery of the shift member 28B, and a first flange 28d spaced apart from the first flange 28d by a predetermined distance to the non-transmission position side. A second flange 28e having a larger protrusion amount than that is formed. The lower end of the operating member 28C engages between the first flange 28d and the second flange 28e in a state in which the operating member 28C is allowed to rotate around the axis P only when adjacent to the notch 28c. At the same time, a semicircular stepped cam portion 28f is formed which presses the shift member 28B to the non-transmission position against the urging of the spring 28D as the operation member 28C rotates around the axis P. ing. On the upper part of the operation member 28C, an operation linked via a linking wire 31 and a storage spring 32 to a corresponding one of the three ridge-side clutch levers 30 arranged side by side on the upper rear surface of the seedling mounting table 15. The arm 28E is welded, and a return spring 28F that biases the operation member 28C toward the operation position in which the smooth surface c of the cam portion 28f faces the second flange 28e is externally fitted.
[0030]
From the above configuration, when the corresponding ridgeline clutch lever 30 is operated from the off position to the on position, the operation member 28C causes the operation member 28C to move its cam portion 28f by the action of the return spring 28F. Is rotated to the operation position facing the second flange 28e, and the shift member 28B is moved by the action of the spring 28D so that the second flange 28e approaches the smooth surface c of the cam portion 28f. The meshing claw 28b is operated to a transmission position at which it meshes with the meshing claw 28a of the rotating body 28A, so that a transmission state for the corresponding planting mechanism 14 appears. When the shift member 28B rotates with the appearance of this transmission state and the first flange 28d comes adjacent to the curved surface d of the cam portion 28f, the first flange 28d is aligned with the outer periphery of the shift member 28B at a predetermined interval. Since the change in the posture of the cam portion 28f is prevented by the first flange 28d and the second flange 28e provided, the rotation operation of the operation member 28C can be reliably disabled, and thus the shift member can be provided. 28B can be stably held at the transmission position.
[0031]
When the corresponding ridge-side clutch lever 30 is operated from the engaged position to the disengaged position, the operating force is accumulated in the accumulation spring 32 until the notch portion 28c is adjacent to the curved surface d of the cam portion 28f, When the notch portion 28c is adjacent to the curved surface d of the cam portion 28f, the cam portion 28f can be engaged with the notch portion 28c and the operation member 28C can be rotated. The rotation operation of the operation member 28C by the action is started, and the cam portion 28f is in a posture of pressing the shift member 28B to the non-transmission position at the other end while engaging one end of the operation member 28C with the notch 28c. Accordingly, the shift member 28B can be reliably operated to the non-transmission position where the meshing claw 28b is separated from the meshing claw 28a of the rotating body 28A, and the corresponding planting mechanism 14 is notched. 28c Predetermined posture in accordance with the formation position, that is, so that it can be stopped in a posture in which a pair of planting claw 14A that is provided on the planting mechanism 14 is separated from the field and Naeno stand 15.
[0032]
As shown in FIGS. 2 and 3, the lateral feed mechanism 16 moves a top member (not shown) provided in a moving body 16 b connected to the seedling mounting table 15 with rotation of the lateral feed drive shaft 16 a. The seedling table 15 can be reciprocated at a constant stroke in the left-right direction by screw-feeding through an endless spiral groove 16c formed on the lateral feed drive shaft 16a.
[0033]
As shown in FIGS. 2, 3, 10 and 11, the vertical feed mechanism 17 includes first vertical feed belts 17 Aa to 5 A 5 arranged in pairs on the seedling mounting surfaces 15 Aa to 15 Ae of the seedling mounting table 15. The vertical feed belt 17Ae is disposed between the first vertical feed belt 17Aa provided on the first seedling mounting surface 15Aa and the second vertical feed belt 17Ab provided on the second seedling mounting surface 15Ab from the right. Input portion 17B, a vertical feed shaft 17C consisting of a hexagonal shaft extending leftward and rightward from the input portion 17B, and a first seedling from the right side which is fitted around the vertical feed shaft 17C so as to be relatively rotatable. The first cylindrical shaft 17Da and the vertical feed shaft 17C, which interlock and connect the pair of first vertical feed belts 17Aa disposed on the mounting surface 15Aa, are externally rotatably fitted to the first cylindrical shaft 17Da and the second seedling mounting surface 15Ab from the right side. A pair of second vertical feed belts arranged in A pair of third vertical feeds which are externally rotatably fitted to the second cylindrical shaft 17Db and the vertical feed shaft 17C for interlocking connection of the 7Abs, and which are disposed on the third seedling (left and right center) seedling mounting surface 15Ac from the right side. A fourth vertical shaft which is externally fitted to the third cylindrical shaft 17Dc and the vertical feed shaft 17C for interlocking connection of the belt 17Ac so as to be rotatable relative to each other, and which is arranged on the seedling mounting surfaces 15Ad and 15Ae of the fourth and fifth lines from the right side. A fourth cylinder shaft 17Dd for interlocking the feed belt 17Ad and the fifth vertical feed belt 17Ae, and a first ridge clutch 17Ea for vertical feed interposed between the vertical feed shaft 17C and the first vertical feed belt 17Aa. A second ridge-side clutch 17Eb for vertical feed interposed between the vertical feed shaft 17C and the second vertical feed belt 17Ab, and is interposed between the vertical feed shaft 17C and the third vertical feed belt 17Ac. 3rd ridge for vertical feed Latch 17Ec, and are configured vertical feed shaft 17C and the fifth longitudinal feed belt 17Ae clutch when the fourth ridge for longitudinal feed, which is interposed between the 17Ed, and the like.
[0034]
The input portion 17B is provided with a pair of drive arms 17b arranged side by side at predetermined intervals on the vertical feed drive shaft 17a, and each time the seedling mounting table 15 reaches the left and right stroke ends, the one-way clutch 17c The vertical feed shaft 17C is configured to intermittently rotate by performing a kick-up operation of the operation arm 17d provided via the control arm.
[0035]
From the above-described configuration, the vertical feeding mechanism 17 can vertically feed the mat-shaped seedlings placed on the seedling mounting surfaces 15a to 15Ae by a predetermined amount each time the seedling mounting table 15 reaches the left and right stroke ends. It has become.
[0036]
As shown in FIGS. 3 and 11, the first ridge-side clutch 17Ea and the second ridge-side clutch 17Eb for vertical feed are connected to the ridge-side clutch lever 30 disposed on the right side via the linking wire 33 and the shift fork 34. Is linked to. The third ridge-side clutch 17Ec for vertical feed is linked to a ridge-side clutch lever 30 disposed at the left and right center via a linking wire 35 and a shift fork 34. The fourth ridge-side clutch 17Ed for vertical feed is linked to a ridge-side clutch lever 30 disposed on the left side via a linking wire 35 and a shift fork 34. That is, by operating the right ridge-side clutch lever 30, the first ridge-side clutch 17Ea and the second ridge-side clutch 17Eb for vertical feed can be simultaneously switched, and the first vertical feed belt 17Aa and the second The transmission state of the vertical feed belt 17Ab can be switched, and the third vertical feed belt 17Ea for vertical feed can be switched by operating the left / right center ridge clutch lever 30. The transmission state for 17Ac can be switched, and by operating the left ridgeline clutch lever 30, the fourth ridgeline clutch 17Ed for vertical feed can be switched, and the fourth vertical feed belt 17Ad and the fifth The state of transmission to the vertical feed belt 17Ae can be switched.
[0037]
As shown in FIG. 12, the link wire 33 that links the first ridge-side clutch 17Ea and the second ridge-side clutch 17Eb for vertical feed to the right-side ridge-side clutch lever 30 is connected to the second ridge-side clutch lever 30 by the second ridge-side clutch lever 30. The first linking wire 33A extends over the front clutch 17Eb, and the second linking wire 33B extends from the end of the first linking wire 33A on the side of the second ridge clutch 17Eb to the first ridge clutch 17Ea. Reference numeral 36 shown in FIGS. 11 and 12 is a guide member that guides the second linking wire 33B toward the first ridge-side clutch 17Ea.
[0038]
In short, according to the above configuration, when only the right-side ridge side clutch lever 30 is operated to the cut position, the planting operation for the two right streaks can be stopped, and the fraction streak can be planted for the three left streaks. Also, when the clutch levers 30 at the ridges on the right and left and right sides are operated to the disengaged positions, the planting operation of the three right streaks can be stopped, and the planting of two left streaks can be performed, Conversely, if only the left-side ridge-side clutch lever 30 is operated to the cut position, the planting operation of the two left streaks can be stopped, and the right three streaks can be planted. By operating the clutch lever 30 at the ridge position at the center of each ridge at the left and right sides, the planting operation of the three left streaks can be stopped, and a fraction of two right streaks can be planted.
[Brief description of the drawings]
FIG. 1 is an overall side view of a rice transplanter.
FIG. 2 is a front view of the seedling planting apparatus.
FIG. 3 is a schematic plan view of a seedling planting device showing an operation structure of a ridge-side clutch.
FIG. 4 is a cross-sectional plan view of a main part showing a configuration of a branch transmission system.
FIG. 5 is a longitudinal rear view of an essential part showing an operating state of a ridge-side clutch for planting.
FIG. 6 is an exploded perspective view of a main part showing a configuration of a ridge-side clutch for planting.
FIG. 7 is a longitudinal sectional side view of an essential part showing a configuration of a ridge-side clutch for planting.
FIG. 8 is a cross-sectional plan view of a main part showing an operating state of a ridge-side clutch for planting.
FIG. 9 is a side view of a shift member and a rotating body in the torque limiter.
FIG. 10 is a longitudinal sectional side view of a main part showing a configuration of an input unit of the vertical feed mechanism.
FIG. 11 is a front view of a main part showing a linkage structure of a ridge-side clutch for vertical feed.
FIG. 12 is a perspective view of a main part showing a configuration of a linking wire;
[Explanation of symbols]
3 Seedling plant
11 feed case
12 Planting transmission case
14 Planting mechanism
15 Seedling platform
15Aa ~ 15Ae Seedling mounting surface
17 Vertical feed mechanism
17Aa-17Ae Vertical feed belt
17B input section
17C Vertical feed axis
17Ea First ridge clutch for vertical feed
17Eb Second ridge clutch for vertical feed
17Ec Third ridge clutch for vertical feed
17Ed Fourth ridge clutch for vertical feed
24 branch transmission system
27 Torque limiter
27a meshing claw
27b meshing claw
28 Cliffs near the ridge for planting
28A transmission system
28B shift member
28C operation member
28c notch
28d first flange
28e 2nd flange
28f Cam section
30 Row-side clutch lever
33 Linking Wire
33A first linking wire
33B 2nd link wire
P axis center

Claims

A ridge-side clutch structure of a rice transplanter, which is configured to be able to plant a fraction of a row by switching a corresponding ridge-side clutch with a plurality of ridge-side clutch levers,
A planting ridge-side clutch provided in each branch transmission system that branches and transmits power from the feed case to a planting mechanism supported by each planting transmission case, a transmission connected to the transmission system on the feed case side. A shift member movable between a position and a non-transmission position separated from the transmission system on the feed case side, and urged to return to the transmission position, and around an axis perpendicular to the moving direction of the shift member. A first flange having a notch formed in a predetermined position on the outer periphery of the shift member, and a predetermined flange extending from the first flange to the non-transmission position side. A second flange spaced from the first flange and the second flange in a state where the operating member allows rotation of the operating member around the axis only when the operating member is adjacent to the notch; When A semi-circular cam portion that engages with the intermediate member and presses the shift member to the non-transmission position with the rotation of the operation member around the axis. Clutch structure.

The branch transmission system is provided with a meshing torque limiter that releases the transmission to the planting mechanism when a load equal to or more than a predetermined value is applied, and the torque limiter is formed with three meshing claws having different arrangement pitches. The ridge-side clutch structure of a rice transplanter according to claim 1, wherein

The seedling planting device includes a vertical feed ridge clutch operated in correspondence with the planting ridge clutch, and a vertical feed mechanism disposed on each seedling mounting surface of the seedling mounting table. Among the feed belts, a vertical feed mechanism is provided between a first vertical feed belt provided on the first seedling mounting surface and a second vertical feed belt provided on the second seedling mounting surface from one side of the left and right sides. And a vertical feed shaft interposed between the vertical feed shaft extending left and right from the input portion and the first vertical feed belt, of the ridge-side clutch for vertical feed. A first ridge-side clutch for feed and a second ridge-side clutch for vertical feed interposed between the vertical feed shaft and the second vertical feed belt are connected to a single ridge via a linking wire. And the connecting wire is moved from the ridge-side clutch lever to the second ridge-side clutch. A first linking wire over from the end of the second ridge when the clutch side of the first linking wire according to claim 1 or 2, wherein are constructed from a second linking wire over the first ridge when clutch planting Clutch structure at the ridge of the machine.