JP3591132B2

JP3591132B2 - Riding rice transplanter with topsoil cultivation

Info

Publication number: JP3591132B2
Application number: JP13115296A
Authority: JP
Inventors: 弘和仲; 一郎渡部; 学名本
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 1996-04-27
Filing date: 1996-04-27
Publication date: 2004-11-17
Anticipated expiration: 2016-04-27
Also published as: JPH09294425A

Description

【０００１】
【発明の属する技術分野】
この発明は、表土耕起付き乗用型田植機に関する。
【０００２】
【従来技術】
従来、特開平７−１４７８０９号公報に開示された表土耕起付き乗用型田植機があった。この従来型の田植機は、田植装置側の昇降作動とは別に表土耕起装置としての代掻ロ−タが昇降制御される構成になっているが、この代掻ロ−タは田植装置を昇降作動するリンク機構の後端部材の真下に位置し上下調節範囲がこの後端部材によって制限されて高く吊り上げ調節できない欠点があった。
【０００３】
また、代掻ロ−タの後側にフロ−ト付きの田植装置が設けられているが、その代掻ロ−タを駆動する伝動ケ−スの後方には整地フロ−トが配置されていなかった。
また、整地フロ−トが奇数個配置されており、中央部フロ−トを接地圧センサ−として田植装置を自動的に昇降する油圧装置の切換弁を切り換えて自動昇降制御を司る構成になっているが、この制御用のフロ−トが１個であり、このフロ−トと隣合う左右側のフロ−トとの間隔が同一になっていた。
【０００４】
更に、田植装置の昇降制御の感度が、代掻ロ−タの上下調節で変更できる連動機構等は全く開示されていなかった。
また、各フロ−トの間隔部に代掻ロ−タで均された圃場表面を均平にする整地体が設けられていなかった。
【０００５】
【発明が解決しようとする課題】
従来のものでは、代掻ロ−タが代表する表土耕起装置の上下調節範囲が少なくて、耕起を必要としない圃場においても耕起してしまい、圃場表面が軟弱になり過ぎて苗植付姿勢の乱れを防止することができなかった。
また、耕起装置の伝動ケ−ス部分は代掻できないままでのこされ、この部分をフロ−ト整地することもできなかった。
【０００６】
また、代掻装置で代表される耕起装置で掻き均されるときに起る水田の泥水波がフロ−ト後部へ通過しにくく、特に、フロ−トによる田植装置の昇降制御用のセンサ−がその中央部のフロ−トである場合に泥水波の影響を受けて正確な昇降制御が出来にくい欠点があった。
また、耕起装置を下降して水田表土を深く起すとき、どうしても田植装置側お上下振動が起り易くなるが、このとき昇降制御がこの振動を受けて無闇に昇降制御される欠点があった。
【０００７】
更に、中央部のフロ−ト間隔が広くなると、この部分の整地が悪くなる欠点があった。
このように、従来技術では諸々の問題点を有していた。
【０００８】
【課題を解決するための手段】
この発明は、前述の課題を解消するために次の技術的な手段を講じた。
第１番目の発明は、乗用型の走行車体１の後部に第１昇降リンク機構１７を介して田植装置２７を装着するに、前記第１昇降リンク機構１７の後部部材２０に後方側へ長く延びた後方延長枠４４ａと、当該後方延長枠４４ａの後部から下方へ延びる下方延長枠４４ｂとからなる側面視が略┓型の屈折状の枠体４４を取付け、この下方延長枠の下端側後部に田植装置２７をロ−リング自在に装着し、前記田植装置側から前方に向かう第２昇降リンク機構４６を設け、この第２昇降リンク機構４６を介して前記屈折状の枠体４４の前側下部に配設する表土耕起装置５０を昇降調節可能に装着してなる表土耕起付き乗用型田植機。
【０００９】
第２番目の発明は、乗用型の走行車体１の後部に第１昇降リンク機構１７を介して田植装置２７を装着するに、前記第１昇降リンク機構１７の後部部材２０に後方側へ長く延びた後方延長枠４４ａと、当該後方延長枠４４ａの後部から下方へ延びる下方延長枠４４ｂとからなる側面視が略┓型の屈折状の枠体４４を取付け、この下方延長枠の下端側後部に田植装置２７をロ−リング自在に装着し、前記田植装置側から前方に向かう第２昇降リンク機構４６を設け、この第２昇降リンク機構４６を介して前記屈折状の枠体４４の前側下部に配設する表土耕起装置５０を昇降調節可能に装着する表土耕起付き乗用型田植機において、前記表土耕起装置５０の駆動ケ−ス５１が配置される部位の後方側には前記田植装置２７の植付部位置を整地する整地フロ−ト３８が配設されている表土耕起付き乗用型田植機。
【００１０】
第３番目の発明は、乗用型の走行車体１の後部に第１昇降リンク機構１７を介して田植装置２７を装着するに、前記第１昇降リンク機構１７の後部部材２０に後方側へ長く延びた後方延長枠４４ａと、当該後方延長枠４４ａの後部から下方へ延びる下方延長枠４４ｂとからなる側面視が略┓型の屈折状の枠体４４を取付け、この下方延長枠の下端側後部に田植装置をロ−リング自在に装着し、前記田植装置側から前方に向かう第２昇降リンク機構４６を設け、この第２昇降リンク機構４６を介して前記屈折状の枠体４４の前側下部に配設する表土耕起装置５０を昇降調節可能に装着してなる表土耕起付き乗用型田植機において、前記田植装置２７の植付部位置を整地する整地フロ−ト３８が偶数個所定の横方向間隔を配して田植装置２７の機体側に後部を支点に前部が上下動自在に取り付けられ、前記中央部分の２個のフロ−ト３８ａ，３８ａの前部側を互いに連結し、この連結されたフロ−ト３８ａの前部側上下動で前記第１昇降リンク機構１７を作動する油圧装置２３の切換弁２６を切り換える構成となし、この連結フロ−ト間隔の幅Ｌを他のフロ−トとの間隔ｌよりも広くしてなる表土耕起付き乗用型田植機。
【００１１】
第４番目の発明は、乗用型の走行車体１の後部に第１昇降リンク機構１７を介して田植装置２７を装着するに、前記第１昇降リンク機構１７の後部部材２０に後方側へ長く延びた後方延長枠４４ａと、当該後方延長枠４４ａの後部から下方へ延びる下方延長枠４４ｂとからなる側面視が略┓型の屈折状の枠体４４を取付け、この下方延長枠の下端側後部に田植装置２７をロ−リング自在に装着し、前記田植装置側から前方に向かう第２昇降リンク機構４６を設け、この第２昇降リンク機構４６を介して前記屈折状の枠体４４の前側下部に配設する表土耕起装置５０を昇降調節可能に装着してなる表土耕起付き乗用型田植機において、前記田植装置２７の植付部位置を整地する整地フロ−ト３８が偶数個所定の横方向間隔を配して田植装置２７の機体側に後部を支点に前部が上下動自在に取り付けられ、前記中央部分の２個のフロ−ト３８ａ，３８ａの前部側を互いに連結し、この連結されたフロ−トの前部側上下動で前記第１昇降リンク機構１７を作動する油圧装置２３の切換弁２６を切り換える構成となし、この連結フロ−ト間隔の幅Ｌを他のフロ−トとの間隔ｌよりも広くし、前記連結された２個のフロ−トの間隔部の前部位置に代掻き整地装置４２を上下動自在に設けてなる表土耕起付き乗用型田植機。
【００１２】
第５番目の発明は、乗用型の走行車体１の後部に第１昇降リンク機構１７を介して田植装置２７を装着するに、前記第１昇降リンク機構１７の後部部材２０に後方側へ長く延びた後方延長枠４４ａと、当該後方延長枠４４ａの後部から下方へ延びる下方延長枠４４ｂとからなる側面視が略┓型の屈折状の枠体４０を取付け、この下方延長枠の下端側後部に田植装置２７をロ−リング自在に装着し、前記田植装置側から前方に向かう第２昇降リンク機構４６を設け、この第２昇降リンク機構４６を介して前記屈折状の枠体４４の前側下部に配設する表土耕起装置５０を昇降調節可能に装着してなる表土耕起付き乗用型田植機において、前記田植装置２７の植付部位置を整地する整地フロ−ト３８が偶数個所定の横方向間隔を配して田植装置２７の機体側に後部を支点に前部が上下動自在に取り付けられ、前記中央部分の２個のフロ−ト３８ａ，３８ａの前部側を互いに連結し、この連結されたフロ−トの前部側上下動で当該フロ−ト前部側が所定範囲以上に上動するとき田植装置２７を上昇し、逆に所定範囲内以下に下動するとき田植装置２７を下降するよう前記第１昇降リンク機構１７を作動する油圧装置２３の切換弁２６を切り換える自動切換機構を構成し、前記第２昇降リンク機構４６により表土耕起装置５０を下降させる側に調節するとき、前記油圧装置２３の切換弁２６を切り換える自動切換機構の田植装置上昇側切換えが鈍感になるよう表土耕起装置５０の昇降調節装置５９と前記油圧装置２３の切換弁２６の切換機構とをフロ−ト３８ａを介さない直接的あるいはフロ−ト３８ａを介した間接的に連動してなる表土耕起付き乗用型田植機。
【００１３】
【作用及び効果】
第１番目の発明では、耕起装置５０の上下調節が、第１昇降リンク機構１７の後側で枠体４４の上位部分の後方延長枠４４ａの下側において行われ、田植装置２７をロ−リング自在に取り付ける軸心位置を下方延長枠４４ｂの下部側後方に設けたから田植装置２７の上下方向重心近くでロ−リングが行われることとなり、的確なロ−リング作用が期待できる。
【００１４】
第２番目の発明では、前記表土耕起装置５０の駆動ケ−ス５１が配置される部位の後方側には前記田植装置２７の植付部位置を整地する整地フロ−ト３８が配設された構成であるから、駆動ケ−ス５１部分の非耕起部分がフロ−トで整地でき確実な植付機能が期待できる。
第３番目の発明では、耕起装置５０の後部に配置する田植装置２７の昇降制御を司るセンサ−としての左右中間部にいちする中央部フロ−ト３８ａ，３８ａの間隔Ｌを之に隣合う側部フロ−ト３８ｂ，３８ｃとの間隔ｌよりも広くすることにより、後方への泥水の逃げを確実にできて、雑草等もひっかかることがなく昇降制御が確実になる。
【００１５】
第４番目の発明では、前記第３目の発明のフロ−ト３８ａ，３８ａの間隔Ｌが広く、この部分にレ−キとしての整地装置４２をもうけたから、整地性能がよくなり、しかもフロ−ト３８ａの前部底板形状に類似のレ−キであるため、雑草や藁屑のひっかかりも少なく、高精度な昇降制御が期待できて、且つ、広幅Ｌ部分の整地ができる。
【００１６】
第５番目の発明では、耕起装置５０を下方へ下げて深く耕起する場合には、自動的にフロ−ト３８ａの浮上を抑制でき、頻繁に油圧装置２３の切換弁２６が切り換わるの防止できてハンチングの少ない昇降制御が期待できる。
【００１７】
【実施例】
この発明の一例を図面に基づき詳細に説明する。
１は走行車体で、左右一対の操舵用の駆動前輪２，２と左右一対の駆動後輪３，３とを有した機体４の上部に搭乗用のステップ板５を張設し、この左右中央前部に操縦枠体６を突出ならしめ、その上側にステアリングポスト７を突出して操縦ハンドル８を設け、この操縦ハンドルの後部側の機体４にエンジン９を搭載して、その外周を前記ステップ板５と一体状のカバ−１０で被い、このカバ−１０の上面側に操縦座席１１を設けた構成になっている。
【００１８】
図中１２はフロントミッションケ−スで、この内部に減速装置やクラッチ装置等の伝動機構を内装し、前記エンジン９側から適宜伝動されるよう構成され、駆動前輪２，２は、このフロントミッションケ−ス１２から左右側に張り出した伝動軸で駆動されるよう構成され、また、左右両側に別れたリヤ−伝動ケ−ス１３，１３が、前記機体４の後部に左右に天秤状の動きをするよう設けられた横枠４ａの両端に取り付けられ、このリヤ伝動ケ−ス１３，１３の外側に前記後輪３，３が軸承されており、この左右のリヤ−伝動ケ−ス１３，１３側に前記フロントミッションケ−ス１２側から平面視でハ字状になったユニバ−サルジョイントを介した駆動軸１４，１４で伝動ならしめている。１５は後輪カバ−で、前記ステップ板５と一体に樹脂材で成型されていて後方側は左右につながっているが、その左右中央部の後端は前側に切り込まれて欠如されている。
【００１９】
１６は支柱で、前記機体４の後端側に基部が固着され、先端側が上方へ突出し前記後輪カバ−１５の後端側切り込み部から更に上方へ突出している。
１７は第１昇降リンク機構で、上リンク１８と下リンク１９の基部側を前記支柱１６にブラケット２１を介して枢着し、これらリンク１８，１９の後端側を後部部材２０で枢結して実施例では平行リンクに仕上げ、この下リンク１９の基部側と一体のレバ−２２を機体４側に取り付けた油圧装置２３のピストンロッド２３ａに連繋して平行リンクを昇降作動できるように構成している。２３ｂは油圧装置のシリンダ−を示す。
【００２０】
ここで、油圧装置２３の作動回路について説明する。
２４は油圧タンク、２５は油圧ポンプ、２６は切換弁であり、油圧ポンプ２５で油圧タンク２４から吸い上げた作動油は切換弁２６を経て油圧シリンダ−２３ｂ内送りこまれてピストンロッド２３ａが突出して田植装置を上昇させ、また、切換弁２６が逆にきりかえられると、田植機側の荷重によりピストンロッド２３ａが引っ込み自由になって田植装置が下降するよう構成されている。
【００２１】
２７は田植装置であり、この機枠部分の主体を構成する伝動ケ−ス２８は、第図および第４図で示した通り、動力入力部及び苗載置台の横移動機構等を内装する主伝動ケ−ス部２８ａと左右横方向へ張り出した伝動軸を包む筒ケ−ス部２８ｂと更に後方側へ分岐して延び、植付装置を駆動するチエン伝動機構を内装した縦伝動ケ−ス部２８ｃで構成されている。２９は主伝動ケ−ス２８ａ内の左右往復横移動機構であるリ−ドカム軸に連繋されて移動する往復移動軸である。
【００２２】
前記田植装置２７の苗載置台３０は、土付きマット状の苗を載置して後述の植付装置に苗を供給するもので、実施例では苗載板を左右側に６区分に仕切板で仕切れ、その苗載板の後部側には苗送り用のベルト３１が前後向けて張設巻回されている。そして、この苗載置台３０を前記伝動ケ−ス２８の上側に配置させて前側が上位になるよう傾斜させ、その下端側を苗受止板３２で受け止め、また、上部側裏面を前記伝動ケ−ス２８側から上方へ突出させた背面視が門型状の支持枠３３により支持し、この苗載置台３０が左右横方向に移動自在に受止めている。
【００２３】
３４は植付装置で、前記縦伝動ケ−ス２８ｃの後方側側部に設けた回転ケ−ス３５の外側部に、植付爪３６を有した植付体３７を設け、この植付爪３６の側面視の軌跡（イ）により、前記苗受止板３２に穿った苗分割口から苗を掻き取って下部の圃場表面に植付けるよう構成されている。
３８は整地用フロ−トで、図例では４個田植装置２７の機枠側に取り付けられ、中央部に同一形状をした２個の中央部フロ−ト３８ａ，３８ａとその外側の平面視が対称状をした側部フロ−ト３８ｂ，３８ｃとが左右側に所定の間隔を配して設けられ、これらのフロ−ト３８の後部側上面が横方向の支軸３９回りに回動して前側が上下動自在に取り付けられている。
【００２４】
そして、この中央部フロ−ト３８ａ，３８ａは、門型状をした連結具４０によって連結し、共に昇降動するよう構成し、この連結具にレリ−ズワイヤ−４１のインナ−側を連結して前記油圧装置の切換弁２６に連繋し、該フロ−ト３８ａが田植装置２７の機枠側に対して一定範囲以上に下動されるときワイヤ−４１が引っ張られて切換弁２６をピストンロッド２３ａが引っ込める状態に切換えて田植装置２７を下降させ、逆に、フロ−ト３８ａが田植装置２７の機枠側に対して一定範囲以上に上動されるときワイヤ−４１が弛められて切換弁２６が復元スプリング４２の張力によりピストンロッド２３ａが突出する状態に切換えて田植装置２７を上昇させ、フロ−ト３８ａが適正高さの状態になると切換弁が中立に切換えられて田植装置２７の上下動が起らないように構成されてる。
【００２５】
前記の各フロ−ト３８ａ，３８ａ，３８ｂ，３８ｃの左右横方向の間隔は、中央部フロ−ト間隔Ｌが広く、中央部フロ−ト３８ａと側部フロ−ト３８ｂあるいは側部オフロ−ト３８ｃとの間隔ｌが間隔Ｌに較べて狭くなっている。また、この広い中央部フロ−ト３８ａ、３８ａ間の前側部分には、代掻き整地装置４２を設け、この整地装置４２は前側上部を横方向の軸を兼ねた前記門型状をした連結具４０に枢着して後方側が上下動自在でスプリング４３により下圧される構成に取り付けられている。尚、この整地装置４２は側面視において、フロ−ト３８ａの前部底面形状と略同じ形状に設けられており、泥水が後方側に逃げ易くなるよう熊手形状の凹凸に構成している。また、中央部フロ−ト３８ａの先端側が他の側部フロ−ト３８ｂ，３８ｃの先端よりも側面視において前方側へ突出した構造になっている。
【００２６】
このように構成された田植装置２７を前記走行車体１側の第１昇降リンク機構１７の後部部材２０に取り付ける手段について詳細に説明する。
４４は田植装置２７を後部部材２０に装着するための枠体で、側面視が略々┓型形状をした後方側に長く延びる後方延長枠４４ａと下方側へ長く延びる下方延長枠４４ｂとからなり、前記後方延長枠４４ａの前端側を前記後部部材２０に一体的に連結し、下方延長枠４４ｂの下端側後部に前記田植装置２７の主伝動ケ−ス２８ａの前側部をロ−リング軸４５を介して田植装置２７の左右中心部がロ−リング自在となるよう連結している。
【００２７】
したがって、前記第１昇降リンク機構１７の上下のリンク後端側を枢結する後部部材２０と、これに取り付けられた枠体４４の下方延長部材４４ｂとの間には高い位置に後方延長枠４４ａが形成されているだけであり、該後方延長部材４４ｂの前側部分には上下方向及び前方に長い空間（Ｃ）が形成される。
４６は第２昇降リンク機構で、上リンク４６ａと下リンク４６ｂの基部側を前記田植装置２７の伝動ケ−ス２８の筒ケ−ス２８ｂに固着したブラケット４７に枢着し先端部を前方側へ突出させて左右横方向へ延ばした筒軸４８に固着したブラケット４９によって枢結し平行リンクに構成している。この第２昇降リンク機構４６は左右側に放して平面視で２か所構成された４連リンクになっており、筒軸４８部分が昇降自在で、当該筒軸４８が側面視における前記枠体４４の空間Ｃ部分に達している。
【００２８】
５０は表土耕起装置で、代掻作業をしないで田植作業をする場合の代掻ロ−タまたは、耕耘しないで直接田植作業をする場合の植付部分前方のみを幅狭く耕耘する何れかの作業を行う装置であり、場合によっては代掻装置あるいは耕耘装置を代表して表土耕起装置と総称し、何れの作業装置であってもよい。そして、この作業を行うロ−タリ軸の駆動ケ−ス５１が前記筒軸４８に一体的に固着されている。即ち、筒軸４８に駆動ケ−ス５１の上下中間部が取り付けられて昇降自在に構成されている。この駆動ケ−ス５１の左右両側に駆動軸５２が突出され、この軸５２に水田圃場の表土を掻き均す代掻ロ−タ５３ａ又は耕耘ロ−タ５３ｂが取付けられた構造になっている。
【００２９】
このように構成される表土耕起装置５０は、前記前記枠体４４の空間Ｃ部分に配置され、この耕起装置５０にはその代掻作業時又は耕耘作業時に発生するう泥土の跳ね上げを防止する上部と後部とを被うロ−タリカバ−５４が設けられている。そして、このカバ−５４の後端側には圃場の表土面に折れ曲がって所定前後幅接当するゴム垂体５５を左右方向にわたって取付けている。そして、前記枠体４４が位置する部分においては、後方側にロ−タリカバ−５４がその下方延長部材４４ｂの下位にまでたっすることから、該カバ−５４を切欠きで表土耕起装置５０を上動してもカバ−５４が該下方延長部材４４ｂに衝突しないよう構成し、しかも、このカバ−５４の欠如部分にはゴム板５６を張設して該下方延長部材４４ｂに当接してもゴム板５６側が凹んで逃げえるよう構成している。
【００３０】
また、前記耕起装置５０の駆動ケ−ス５１側には動力を走行車体１側のフロントミッションケ−ス１２側から後方へ突出させた駆動軸５７で駆動し、田植装置２７の伝動ケ−ス２８側への動力も走行車体１側のフロントミッションケ−ス１２側から後方へ突出させた駆動軸５８で駆動するが、この２個の動力伝達用駆動軸５７，５８は前記枠体４４の左右側に位置し、ロ−リング軸を挟んだ形態でもうけられている。即ち、駆動軸５７，５８がロ−リング軸の一側に偏った状態で構成されているから、動力伝達がロ−リングバランスを崩すことなく行われ、ロ−リングに悪影響を及ぼさない。
【００３１】
駆動ケ−ス５１の位置は、田植装置２７の中央部フロ−ト３８ａの前位に配置され、この駆動ケ−ス部分は代掻ロ−タの整地機能がないから、該フロ−ト３８ａで整地されるように構成されている。
５９は前記耕起装置５０の昇降調節装置で、前記田植装置２７側の苗載置台３０の門型状をした支持枠３３に取り付けた横軸パイプ６０に基部側を固着したブラケット６１に球状軸受されて自由回動する筒型メタル６２内に、縦筒６３内で回転自在に軸受された螺子筒６４をもうけて、前記メタル６２の上側に設けた調節ハンドル６５で該螺子筒６４を正、逆転可能に構成し、この螺子筒６４に螺子軸６６を螺合させ、この螺子軸６６の下端側に前記筒軸４８を取付け、前記ハンドル６５の回転操作で筒軸４８を介して耕起装置５０を上下調節できるように構成している。
【００３２】
前記中央部フロ−ト３８ａの前部側上下動により、油圧切換弁２６が切り換えられて田植装置２７が昇降制御されるが、圃場の状態によりこの昇降制御の感度、特に田植装置２７が上昇される場合の感度を調節することが要求される。そこで、前記フロ−ト３８ａの前側上面をスプリング６７を介して押圧するフロ−ト上動抵抗体６８を設け、このスプリング６７の張力を操縦者手元側のレバ−６９でワイヤ−７０を介して調節できるようにするとともに、このフロ−ト上動抵抗体６８の取付体を前記第２昇降リンク機構４６のリンク４７側に固着したア−ム７１に枢着している。そして前記スプリング６７を該ア−ム７１に一体のブラケット７２とフロ−ト上動抵抗体６８の取付体７３との間に介在させている。したがって、レバ−６９によりスプリング６７の張圧力を変更して感度調節が可能であり、かつ、耕起装置５０の上下調節によって自動的に感度調節が可能な構成になっている。即ち、耕起深さを深くするとき、フロ−ト３８ａの上動が抑制される方向になり田植装置２７の上昇制御感度が鈍くなる。
【００３３】
尚、耕起装置５０の代掻ロ−タ−による作業は、水田圃場の表土の状態や土質等により、代掻き状態を変更する必要があり、代掻ロ−タの回転周速を田植作業時の走行速度よりも一般的には高速にして代掻作業をするが、この走行速度よりも遅くしたり同一速度にすることにより代掻きをしないで水田表土を均す機能や全く均しの代掻きもしない状態にすることも可能になる。実施例では駆動ケ−ス５１内に変速機構７４を設け、変速レバ−７５で作業時の走行速度とロ−タリ回転周速とが若干マイナス速から高速にまで変速できるように構成して、圃場の条件に合わした変速を可能にしている。この場合、該代掻ロ−タ−の駆動を油圧モ−タで駆動して正、逆無段変速機構を採用することもできる。
【００３４】
尚、図中の符号７６は施肥装置を示し、ホッパ−７７内の肥料を、下部繰出装置７８で繰出し、起風装置７９から空気溜室８０を介して送風される可撓性の移送パイプ８１の中に、繰り出された肥料を供給して田植装置２７の各フロ−ト３８に設けた肥料散布管８２中に送りこみ、田植えと同時に施肥されるよう構成されている。
【００３５】
上例の作用について説明すると、この発明の実施例によれば、田植作業と同時に代掻きを省略した圃場であっても表土を均すだけで簡単にさぎょうでき、また、耕耘を省略している圃場の場合には植付位置だけを幅狭く掘削して、そこに苗を植付けることができ、田植作業時の前作業工程が省略できる。具体的な作用については構成を説明する時点で明らかにしたので、極く簡単に説明する。
【００３６】
代掻き作業又は耕耘作業等の耕起装置５０による作業時に、その圃場の状態、硬軟度や土質あるいは水の深さ等に応じて上下調節装置５９により耕起装置５０の高さが調節できる。即ち、ハンドル６５の回転操作で第２昇降リンク機構４６が回動調節されてその高さが調節されるが、このとき、該耕起装置５０が第１昇降リンク機構１７の後部で枠体４４の下方延長部材４４ｂの前側に形成された空間Ｃの位置で上下調節されてために調節範囲を大きくでき、耕起を不要とするような圃場では表土面に接触しない位置にまでも調節できるようになる。
また、耕起された跡に植付作業するが、この複数個のフロ−トの内で中央部フロ−ト２８ａ，２８ａの間隔が広くなり、この中央部フロ−トによって田植装置２７の昇降制御が行われるから、水田表土面の泥水がこの広い間隔Ｌから後方側に抵抗にならずに流下され、田植装置２７の昇降制御が誤作動しないでおこなわれる。
また、耕起装置５０の駆動ケ−ス５１の後側にフロ−ト３８の整地部を構成したために、駆動ケ−ス５１のために整地されない状態の表土部分が残らず確実に表土面が整地される。
更に、昇降制御用の切換弁２６に連繋された中央部フロ−ト３８ａ，３８ａの広幅間隔Ｌの間の前部にレ−キ状の整地装置４２を設けたから、この間隔部Ｌも整地でき、また、両フロ−ト３８ａ，３８と共に該整地装置４２が上下動するから田植装置２７の昇降制御に悪影響を及ぼさないですむ。
【００３７】
また、耕起装置５０が装備された田植装置の場合には、耕起深さにより機体の振動が生じやすく、特に深く代掻きする場合には昇降制御の切換弁２６の切換えが頻繁に起り確実な制御機能がなされないことになるが、実施例の通り耕起装置５０を深く調節するときは感度が鈍くなるよう連動させるから制御が的確に行われる。
【図面の簡単な説明】
【図１】側面図
【図２】平面図
【図３】要部の簡略平面図
【図４】要部の平面図
【図５】油圧回路図
【図６】要部の斜面図
【図７】要部の側面図
【図８】要部の側面図
【図９】要部の側面図
【図１０】別例の要部の簡略側面図
【符号の説明】
１走行車体
１７第１昇降リンク機構
２０後部部材
２３油圧装置
２６切換弁
２７田植装置
３８整地フロ−ト
３８ａ中央部フロ−ト
３８ｂ側部フロ−ト
３８ｃ側部フロ−ト
４２整地装置（レ−キ）
４４枠体
４４ａ後方延長枠
４４ｂ下方延長枠
４６第２昇降リンク機構
５０表土耕起装置
５１駆動ケ−ス
５９昇降調節装置
Ｌ広幅部
ｌ狭幅部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a riding type rice transplanter with topsoil cultivation.
[0002]
[Prior art]
Conventionally, there has been a riding type rice transplanter with topsoil cultivation disclosed in Japanese Patent Application Laid-Open No. 7-147809. This conventional rice transplanter is configured such that a scraping rotor as a topsoil cultivation device is controlled to move up and down separately from the raising and lowering operation of the rice transplanting device side. There is a disadvantage that the vertical adjustment range is limited by the rear end member, which is located directly below the rear end member of the link mechanism that moves up and down, and cannot be lifted and adjusted high.
[0003]
A rice transplanting device with a float is provided on the rear side of the scraping rotor, but a leveling float is arranged behind a transmission case for driving the scraping rotor. Did not.
In addition, an odd number of leveling floats are arranged, and a central float is used as a ground pressure sensor to switch the switching valve of a hydraulic device that automatically raises and lowers the rice transplanting apparatus, thereby controlling the automatic raising and lowering control. However, the number of the control float is one, and the interval between the float and the adjacent left and right floats is the same.
[0004]
Furthermore, there has been no disclosure of an interlocking mechanism or the like in which the sensitivity of the raising and lowering control of the rice transplanting apparatus can be changed by vertically adjusting the substitute rotor.
In addition, no leveling material for leveling the surface of the field leveled by the scraping rotor was provided at the interval between the floats.
[0005]
[Problems to be solved by the invention]
In the prior art, the up and down adjustment range of the topsoil cultivation device represented by the substitute rotor is small, and the cultivation is carried out even in a field that does not require tillage. It was not possible to prevent the posture from being disturbed.
In addition, the transmission case of the tillage device was left unremovable, and this portion could not be floated.
[0006]
Further, muddy water waves in the paddy field, which are generated when the paddy fields are raked by a plowing device, are difficult to pass to the rear of the float, and particularly, a sensor for controlling the elevation of the rice transplanting device by the float. However, there is a drawback in that it is difficult to perform accurate ascent / descent control due to the influence of the muddy water when the float is located at the center of the float.
In addition, when the tillage device is lowered to raise the paddy rice topsoil deeply, the rice planting device side vertical vibration is apt to occur, but at this time, there is a drawback that the elevation control is controlled by this vibration in a dark manner.
[0007]
Further, if the float interval in the central portion is widened, there is a disadvantage that the leveling of this portion is deteriorated.
As described above, the conventional technique has various problems.
[0008]
[Means for Solving the Problems]
The present invention has taken the following technical measures in order to solve the above-mentioned problems.
According to the first invention, when the rice transplanting device 27 is mounted on the rear portion of the riding type traveling vehicle body 1 via the first lifting link mechanism 17, the rear member 20 of the first lifting link mechanism 17 extends long rearward. And a lower extension frame 44b extending downward from the rear portion of the rear extension frame 44a. The rice transplanting device 27 is rotatably mounted, and a second elevating link mechanism 46 is provided forwardly from the rice transplanting device side. The second elevating link mechanism 46 is provided at the lower front side of the refracting frame 44 via the second elevating link mechanism 46. A riding type rice transplanter with topsoil cultivation in which a topsoil cultivation device 50 to be provided is mounted so as to be able to move up and down.
[0009]
According to the second invention, when the rice transplanting device 27 is mounted on the rear part of the riding type traveling vehicle body 1 via the first lifting link mechanism 17, the rear member 20 of the first lifting link mechanism 17 extends long to the rear side. And a lower extension frame 44b extending downward from the rear portion of the rear extension frame 44a. The rice transplanting device 27 is rotatably mounted, and a second elevating link mechanism 46 is provided forwardly from the rice transplanting device side. The second elevating link mechanism 46 is provided at the lower front side of the refracting frame 44 via the second elevating link mechanism 46. In a riding type rice transplanter with topsoil cultivation in which a topsoil cultivation device 50 to be provided is mounted so as to be able to move up and down, the rice transplanting device is provided behind a portion where a drive case 51 of the topsoil cultivation device 50 is arranged. Level 27 planting sites Earth flow - with topsoil tillage door 38 is disposed riding type rice planting machine.
[0010]
In the third invention, when the rice transplanting device 27 is mounted on the rear portion of the riding type traveling vehicle body 1 via the first lifting link mechanism 17, the rear member 20 of the first lifting link mechanism 17 extends long to the rear side. And a lower extension frame 44b extending downward from the rear portion of the rear extension frame 44a. The rice transplanting device is rotatably mounted, and a second elevating link mechanism 46 is provided forwardly from the rice transplanting device side. The second elevating link mechanism 46 is disposed on the lower front side of the bent frame body 44 via the second elevating link mechanism 46. In a riding type rice transplanter with topsoil cultivation in which a topsoil cultivation device 50 to be installed is mounted so as to be able to move up and down, an even number of leveling floats 38 for leveling the planting portion of the rice cultivation device 27 in a predetermined lateral direction. The rice planting machine 27 The front part is attached to the front part of the two parts 38a, 38a in the central part so as to be movable up and down with the rear part as a fulcrum, and the front part of the connected float 38a is connected to each other. The switching valve 26 of the hydraulic device 23 that operates the first lifting link mechanism 17 by vertical movement is configured to be switched, and the width L of the connection float interval is set to be wider than the interval l to other floats. Riding rice transplanter with topsoil cultivation.
[0011]
In the fourth invention, when the rice transplanting device 27 is mounted on the rear part of the riding type traveling vehicle body 1 via the first lifting link mechanism 17, the rear member 20 of the first lifting link mechanism 17 extends long to the rear side. And a lower extension frame 44b extending downward from the rear portion of the rear extension frame 44a. The rice transplanting device 27 is rotatably mounted, and a second elevating link mechanism 46 is provided forwardly from the rice transplanting device side. The second elevating link mechanism 46 is provided at the lower front side of the refracting frame 44 via the second elevating link mechanism 46. In a riding type rice transplanter with topsoil cultivation in which a topsoil cultivation device 50 to be arranged is mounted so as to be able to move up and down, an even number of predetermined leveling floats 38 for leveling the planting portion of the rice cultivation device 27 is provided. Rice transplanting equipment 27 A front portion is attached to the body side so as to be movable up and down with a rear portion as a fulcrum. The front portions of the two floats 38a, 38a in the central portion are connected to each other, and the front portion of the connected floats is connected. The switching valve 26 of the hydraulic device 23 that operates the first lifting link mechanism 17 by vertical movement is configured to be switched, and the width L of the connection float interval is made larger than the interval l with other floats, A riding type rice transplanter with topsoil cultivation, wherein a scraping and leveling device 42 is provided at a front position of a space between the two connected floats so as to be vertically movable.
[0012]
In the fifth invention, when the rice transplanting device 27 is mounted to the rear part of the riding type traveling vehicle body 1 via the first lifting link mechanism 17, the rear member 20 of the first lifting link mechanism 17 extends long to the rear side. A rearwardly extending frame 44a and a downwardly extending frame 44b extending downward from the rear portion of the rearwardly extending frame 44a are attached with a refraction-like frame 40 having a substantially ┓ shape when viewed from the side. The rice transplanting device 27 is rotatably mounted, and a second elevating link mechanism 46 is provided forwardly from the rice transplanting device side. The second elevating link mechanism 46 is provided at the lower front side of the refracting frame 44 via the second elevating link mechanism 46. In a riding type rice transplanter with topsoil cultivation in which a topsoil cultivation device 50 to be arranged is mounted so as to be able to move up and down, an even number of predetermined leveling floats 38 for leveling the planting portion of the rice cultivation device 27 is provided. Rice transplanting equipment 27 A front portion is attached to the body side so as to be movable up and down with a rear portion as a fulcrum. The front portions of the two floats 38a, 38a in the central portion are connected to each other, and the front portion of the connected floats is connected. The first elevating link mechanism 17 raises and lowers the rice transplanting device 27 when the front part of the float moves upward beyond a predetermined range by vertical movement, and lowers the rice transplanting device 27 when moving downward within a predetermined range. When the second lifting link mechanism 46 adjusts the topsoil cultivation device 50 to the lower side, the switching valve 26 of the hydraulic device 23 is set to an automatic switching mechanism for switching the switching valve 26 of the hydraulic device 23 that operates the hydraulic device 23. The raising / lowering adjusting device 59 of the topsoil cultivating device 50 and the switching mechanism of the switching valve 26 of the hydraulic device 23 are directly or floatingly connected via the float 38a so that the switching of the rice planting device on the upside of the automatic switching mechanism for switching is insensitive. With topsoil plowing formed by indirectly linked through the door 38a riding rice planting machine.
[0013]
[Action and effect]
In the first invention, the up and down adjustment of the tillage device 50 is performed on the rear side of the first elevating link mechanism 17 below the rear extension frame 44a on the upper portion of the frame body 44, and the rice planting device 27 is lowered. Since the axial position for freely attaching the ring is provided on the lower rear side of the lower extension frame 44b, the rolling is performed near the vertical center of gravity of the rice transplanting device 27, and an accurate rolling action can be expected.
[0014]
In the second aspect of the present invention, a leveling float 38 for leveling the planting portion of the rice planting device 27 is disposed behind the portion where the drive case 51 of the topsoil cultivation device 50 is disposed. With this configuration, the non-plowed portion of the drive case 51 can be leveled with floats, and a reliable planting function can be expected.
In the third aspect of the present invention, the interval L between the central floats 38a, 38a located at the left and right intermediate portions as sensors for controlling the raising and lowering of the rice transplanting device 27 disposed at the rear of the tillage device 50 is adjacent to the sensor. By making the distance l from the side floats 38b and 38c wider, the escape of muddy water to the rear can be ensured, and weeds and the like can be prevented from getting caught and the ascent / descent control can be ensured.
[0015]
In the fourth aspect of the present invention, the spacing L between the floats 38a, 38a of the third aspect of the present invention is wide and the leveling device 42 as a rake is provided in this portion, so that the leveling performance is improved and the flow is improved. Since the rake is similar to the shape of the front bottom plate of the toe 38a, it is less likely to be caught by weeds and straw debris, high-precision vertical control can be expected, and leveling of the wide L portion can be performed.
[0016]
According to the fifth aspect of the present invention, when the tillage device 50 is lowered downward to plow deeply, the floating of the float 38a can be automatically suppressed, and the switching valve 26 of the hydraulic device 23 switches frequently. It can be expected that lifting control with less hunting can be prevented.
[0017]
【Example】
An example of the present invention will be described in detail with reference to the drawings.
Reference numeral 1 denotes a traveling vehicle body. A step board 5 for riding is stretched over an upper part of an airframe 4 having a pair of left and right driving front wheels 2 and 2 and a pair of left and right driving rear wheels 3 and 3. A control frame 6 is protruded from the front, a steering post 7 is protruded above the control frame 6, and a control handle 8 is provided. An engine 9 is mounted on the body 4 on the rear side of the control handle, and the outer periphery of the control plate is the step board. 5 is covered with a cover 10 integral with the cover 5, and the upper surface of the cover 10 is steered. seat 11 is provided.
[0018]
In the figure, reference numeral 12 denotes a front transmission case, in which a transmission mechanism such as a reduction gear and a clutch device is provided, which is configured to be appropriately transmitted from the engine 9 side. Rear transmission cases 13, 13 which are driven by a transmission shaft projecting to the left and right sides from the case 12, and which are separated on the left and right sides, have a balance-like movement to the left and right at the rear of the body 4. The rear wheels 3, 3 are mounted on the outer sides of the rear transmission cases 13, 13, and the left and right rear transmission cases 13, On the side 13, transmission is performed by drive shafts 14, 14 via a universal joint formed in a U-shape in plan view from the front transmission case 12 side. Reference numeral 15 denotes a rear wheel cover, which is molded of a resin material integrally with the step plate 5 and is connected to the left and right at the rear side, but the rear ends at the left and right central portions are cut into the front side and are missing. .
[0019]
Reference numeral 16 denotes a column having a base fixed to the rear end of the body 4, the front end protruding upward, and further projecting upward from the rear end cutout of the rear wheel cover 15.
Reference numeral 17 denotes a first elevating link mechanism, which pivotally connects the bases of the upper link 18 and the lower link 19 to the support 16 via a bracket 21, and pivotally connects the rear ends of the links 18 and 19 with a rear member 20. In this embodiment, the parallel link is finished, and a lever 22 integrated with the base side of the lower link 19 is connected to a piston rod 23a of a hydraulic device 23 attached to the body 4 so that the parallel link can be raised and lowered. ing. 23b indicates a cylinder of the hydraulic device.
[0020]
Here, an operation circuit of the hydraulic device 23 will be described.
Reference numeral 24 denotes a hydraulic tank, reference numeral 25 denotes a hydraulic pump, and reference numeral 26 denotes a switching valve. The hydraulic oil pumped up from the hydraulic tank 24 by the hydraulic pump 25 is fed into the hydraulic cylinder 23b through the switching valve 26, and the piston rod 23a projects and When the apparatus is raised and the switching valve 26 is switched in reverse, the piston rod 23a is freely retracted by the load on the rice transplanter side, and the rice transplanter is lowered.
[0021]
Numeral 27 denotes a rice transplanting device, and a transmission case 28, which forms the main body of the machine frame portion, has a power input unit and a horizontal moving mechanism for the seedling mounting table and the like as shown in FIGS. A vertical transmission case in which a transmission case portion 28a, a cylindrical case portion 28b which wraps a transmission shaft projecting in the left-right direction, and a chain transmission mechanism for branching and extending further rearward to drive the planting device are provided. It is composed of a part 28c. Reference numeral 29 denotes a reciprocating shaft that moves in connection with a lead cam shaft, which is a left-right reciprocating lateral moving mechanism in the main transmission case 28a.
[0022]
The seedling mounting table 30 of the rice planting device 27 is for placing a mat-shaped seedling with soil and supplying the seedlings to a planting device described later. In the embodiment, the seedling mounting plate is divided into six sections on the left and right sides. A belt 31 for feeding seedlings is stretched and wound forward and backward on the rear side of the seedling mounting plate. Then, the seedling mounting table 30 is disposed above the transmission case 28 and is inclined so that the front side is higher, the lower end side thereof is received by the seedling receiving plate 32, and the upper back surface is the transmission case. A rear view protruding upward from the side 28 is supported by a gate-shaped support frame 33, and the seedling mounting table 30 is movably received in the lateral direction.
[0023]
Numeral 34 denotes a planting device, which is provided with a planting body 37 having a planting claw 36 on the outer side of a rotating case 35 provided on the rear side of the vertical transmission case 28c. The seedlings are scraped from the seedling dividing hole formed in the seedling receiving plate 32 and planted on the lower surface of the field according to the locus (a) of the side view 36.
Numeral 38 denotes a leveling float, which is attached to the machine frame side of the four rice transplanters 27 in the illustrated example, and has two central floats 38a, 38a having the same shape in the central portion, and a plan view of the outside thereof. Symmetrical side floats 38b and 38c are provided at predetermined intervals on the left and right sides, and the upper surface of the rear side of these floats 38 rotates about a lateral support shaft 39 to rotate. The front side is attached to be able to move up and down.
[0024]
The central floats 38a, 38a are connected by a connecting member 40 having a gate shape and are configured to move up and down together. The inner side of the release wire 41 is connected to the connecting member. When the float 38a is lowered to a predetermined range or more with respect to the machine frame side of the rice transplanting device 27, the wire 41 is pulled to connect the switching valve 26 to the piston rod 23a. Is switched to the retracted state, and the rice transplanter 27 is lowered. Conversely, when the float 38a is moved upwardly beyond a predetermined range with respect to the machine frame side of the rice transplanter 27, the wire 41 is loosened and the switching valve is released. 26 switches the piston rod 23a to the projecting state by the tension of the restoration spring 42 and raises the rice transplanting device 27. When the float 38a reaches the appropriate height, the switching valve is switched to neutral and the rice transplanting device 27 is switched. And it is configured to move up and down is not occur.
[0025]
As for the horizontal spacing between the floats 38a, 38a, 38b and 38c, the central float interval L is wide, and the central float 38a and the lateral float 38b or the lateral off-road are provided. The interval 1 with respect to 38c is smaller than the interval L. A scraping leveling device 42 is provided at the front side between the wide central floats 38a, 38a, and the leveling device 42 has the front upper portion serving as the portal-shaped connecting tool 40 also serving as a horizontal axis. , And the rear side is freely movable up and down so that the pressure is reduced by a spring 43. The leveling device 42 is provided in substantially the same shape as the front bottom surface of the float 38a in a side view, and is formed in a rake-like unevenness so that muddy water can easily escape to the rear side. Further, the distal end of the central portion float 38a is configured to protrude forward in the side view from the distal ends of the other side floats 38b and 38c.
[0026]
The means for attaching the rice transplanting device 27 thus configured to the rear member 20 of the first lifting link mechanism 17 on the traveling vehicle body 1 side will be described in detail.
Reference numeral 44 denotes a frame for mounting the rice transplanting device 27 to the rear member 20. The frame 44 includes a rear extension frame 44a extending substantially rearward and having a substantially ┓ shape in side view, and a lower extension frame 44b extending long downward. The front end of the rear extension frame 44a is integrally connected to the rear member 20, and the front side of the main transmission case 28a of the rice transplanting device 27 is connected to the rolling shaft 45 at the rear lower end of the lower extension frame 44b. The right and left central portions of the rice transplanting device 27 are connected to each other so as to be freely rollable.
[0027]
Therefore, the rear extension frame 44a is located at a high position between the rear member 20 pivotally connecting the upper and lower link rear ends of the first lifting link mechanism 17 and the lower extension member 44b of the frame body 44 attached thereto. Is formed, and a long space (C) is formed in the front part of the rear extension member 44b in the vertical and forward directions.
Numeral 46 denotes a second elevating link mechanism. The base side of the upper link 46a and the lower link 46b is pivotally connected to a bracket 47 fixed to the cylindrical case 28b of the transmission case 28 of the rice transplanting device 27, and the front end is forward. And a parallel link formed by a bracket 49 fixed to a cylindrical shaft 48 extending in the left-right lateral direction. The second lifting link mechanism 46 is a quadruple link formed in two places in a plan view when released to the left and right. The cylindrical shaft 48 can be moved up and down, and the cylindrical shaft 48 is connected to the frame body in a side view. The space C of 44 is reached.
[0028]
Reference numeral 50 denotes a topsoil cultivation device, which is either a slashing rotor for performing rice transplanting without slashing, or a narrow tilling only in front of a planted portion when directly sowning without tilling. It is a device for performing work, and in some cases, may be any working device, collectively referred to as a topsoil cultivation device, representing a substitute device or a tillage device. A drive case 51 of a rotary shaft for performing this operation is integrally fixed to the cylindrical shaft 48. That is, the upper and lower intermediate portions of the drive case 51 are attached to the cylindrical shaft 48 so as to be able to move up and down. Driving shafts 52 protrude on both left and right sides of the driving case 51, and a structure is provided in which a shaking rotor 53a or a tilling rotor 53b for leveling the topsoil of a paddy field is attached to the shaft 52. .
[0029]
The topsoil plowing device 50 thus configured is disposed in the space C of the frame body 44, and the plowing device 50 has a function to prevent muddy soil generated at the time of the scraping work or the plowing work. A rotary cover 54 is provided to cover the upper and rear portions to prevent. At the rear end side of the cover 54, a rubber rod 55 which is bent to the topsoil surface of the field and abuts a predetermined width in the front-rear direction is attached in the left-right direction. In the portion where the frame body 44 is located, the rotary cover 54 extends rearward to the lower side of the lower extension member 44b. Even if the cover 54 is moved upward, the cover 54 does not collide with the lower extension member 44b. Further, even if the rubber plate 56 is stretched on the missing portion of the cover 54 to abut on the lower extension member 44b. The rubber plate 56 side is configured to be dented and escape.
[0030]
Power is driven by a drive shaft 57 protruding rearward from the front transmission case 12 side of the traveling vehicle body 1 on the drive case 51 side of the plowing device 50, and the power transmission case of the rice planting device 27. The power to the gear 28 is also driven by a drive shaft 58 protruding rearward from the front transmission case 12 side of the traveling vehicle body 1, and the two power transmission drive shafts 57, 58 are connected to the frame 44. It is located on the left and right sides of the vehicle, and is provided with the rolling shaft interposed therebetween. That is, since the drive shafts 57 and 58 are configured to be biased to one side of the rolling shaft, power transmission is performed without breaking the rolling balance, and the rolling is not adversely affected.
[0031]
The position of the drive case 51 is located in front of the center float 38a of the rice transplanting device 27. Since this drive case does not have the function of leveling the substitute rotor, the drive case 51a is provided. It is configured to be leveled at.
Numeral 59 denotes a lifting / lowering adjusting device for the plowing device 50. A spherical bearing is mounted on a bracket 61 having a base portion fixed to a horizontal shaft pipe 60 attached to the gate-shaped support frame 33 of the seedling mounting table 30 on the rice transplanting device 27 side. A screw cylinder 64 rotatably supported in the vertical cylinder 63 is provided in the cylindrical metal 62 which is rotated freely, and the screw cylinder 64 is fixed by an adjustment handle 65 provided above the metal 62. A screw shaft 66 is screwed into the screw cylinder 64, the cylinder shaft 48 is attached to the lower end of the screw shaft 66, and the rotation of the handle 65 causes the plowing device via the cylinder shaft 48. It is configured so that 50 can be adjusted up and down.
[0032]
The hydraulic switching valve 26 is switched by the vertical movement of the front part 38a of the central part 38a to control the raising and lowering of the rice planting apparatus 27. Depending on the condition of the field, the sensitivity of this raising and lowering control, particularly the rice transplanting apparatus 27, is raised. It is necessary to adjust the sensitivity in the case where Therefore, a floating upper dynamic resistor 68 for pressing the front upper surface of the float 38a via a spring 67 is provided, and the tension of the spring 67 is adjusted by a lever 69 at the operator's hand side via a wire 70. In addition to being adjustable, the mounting body of the floating dynamic resistor 68 is pivotally connected to an arm 71 fixed to the link 47 of the second lifting link mechanism 46. The spring 67 is interposed between a bracket 72 integral with the arm 71 and a mounting member 73 of the floating dynamic resistor 68. Therefore, the sensitivity can be adjusted by changing the tension of the spring 67 by the lever 69, and the sensitivity can be automatically adjusted by vertically adjusting the tillage device 50. That is, when the tillage depth is increased, the upward movement of the float 38a is suppressed, and the sensitivity of the rice transplanting apparatus 27 to rise is reduced.
[0033]
In the operation of the tillage device 50 using the scraping rotor, it is necessary to change the scraping state according to the condition of the topsoil in the paddy field, the soil quality, and the like. Generally, the scraping work is performed at a higher speed than the running speed of the paddy field. It is also possible to set it not to. In this embodiment, a speed change mechanism 74 is provided in the drive case 51 so that the speed at the time of work and the peripheral speed of the rotary rotation can be changed from a slightly negative speed to a high speed by the speed change lever 75. A shift that matches the conditions of the field is enabled. In this case, the drive of the substitute rotor may be driven by a hydraulic motor to employ a forward / reverse continuously variable transmission mechanism.
[0034]
Reference numeral 76 in the drawing denotes a fertilizer application device, and a fertilizer in a hopper 77 is fed by a lower feeding device 78, and a flexible transfer pipe 81 which is blown from a draft device 79 through an air reservoir 80. Is fed into the fertilizer spray pipe 82 provided on each of the floats 38 of the rice planting apparatus 27 to be fertilized simultaneously with the planting.
[0035]
To explain the operation of the above example, according to the embodiment of the present invention, even in a field where padding is omitted at the same time as rice planting work, it is easy to saturate simply by leveling the topsoil, and tilling is omitted. In the case of an existing field, only the planting position can be excavated narrowly and the seedlings can be planted there, and the pre-operation step at the time of the rice planting operation can be omitted. Since the specific operation has been clarified at the time of describing the configuration, it will be described only briefly.
[0036]
At the time of the work with the tillage device 50 such as the scraping work or the tillage work, the height of the tillage device 50 can be adjusted by the up-and-down adjustment device 59 according to the condition of the field, the hardness, the soil quality or the depth of water. That is, the rotation of the handle 65 causes the second lifting link mechanism 46 to rotate and adjust its height. At this time, the tillage device 50 is moved by the frame 44 at the rear of the first lifting link mechanism 17. It can be adjusted up and down at the position of the space C formed on the front side of the lower extension member 44b so that the adjustment range can be increased, and even in a field where plowing is unnecessary, it can be adjusted even to a position where it does not contact the topsoil surface. become.
In addition, the planting work is carried out on the plowed trace. Among the plurality of floats, the interval between the central floats 28a, 28a is widened. Since the control is performed, the muddy water on the top soil surface of the paddy field flows down from the wide space L to the rear without any resistance, and the raising and lowering control of the rice transplanting device 27 is performed without malfunction.
In addition, since the leveling portion of the float 38 is formed on the rear side of the drive case 51 of the plowing device 50, the topsoil surface that is not leveled due to the drive case 51 does not remain and the topsoil surface is reliably formed. It is leveled.
Further, since the rake-like leveling device 42 is provided at the front portion between the wide intervals L of the central floats 38a, 38a connected to the switching valve 26 for elevation control, the interval L can also be leveled. In addition, the leveling device 42 moves up and down together with the two floats 38a and 38, so that the raising and lowering control of the rice transplanting device 27 is not adversely affected.
[0037]
Further, in the case of the rice transplanting apparatus equipped with the plowing device 50, the vibration of the body is easily generated due to the plowing depth, and particularly when deeper scraping is performed, the switching of the switching valve 26 of the lifting / lowering control is frequently performed and reliable. Although the control function will not be performed, when the tillage device 50 is adjusted deeply as in the embodiment, the control is performed accurately because the sensitivity is reduced so as to interlock.
[Brief description of the drawings]
FIG. 1 is a side view
FIG. 2 is a plan view
FIG. 3 is a simplified plan view of a main part.
FIG. 4 is a plan view of a main part.
FIG. 5 is a hydraulic circuit diagram
FIG. 6 is a perspective view of a main part.
FIG. 7 is a side view of a main part.
FIG. 8 is a side view of a main part.
FIG. 9 is a side view of a main part.
FIG. 10 is a simplified side view of a main part of another example.
[Explanation of symbols]
1 Running body
17 First lifting link mechanism
20 Rear members
23 Hydraulic system
26 Switching valve
27 Rice transplanting equipment
38 Leveling Float
38a Central part float
38b Side float
38c Side float
42 Leveling equipment (rake)
44 Frame
44a Rear extension frame
44b Lower extension frame
46 Second lifting link mechanism
50 Topsoil cultivation equipment
51 Driving case
59 Lift control device
L Wide section
l Narrow part

Claims

To mount the rice transplanting device 27 on the rear part of the riding type traveling vehicle body 1 via the first elevating link mechanism 17, a rear extension frame 44a extending long to the rear side of the rear member 20 of the first elevating link mechanism 17, A resilient frame body 44 having a substantially ┓ shape in side view, comprising a lower extension frame 44b extending downward from the rear portion of the rear extension frame 44a, is mounted, and the rice transplanting device 27 is rolled on the lower rear portion of the lower extension frame. A topsoil cultivation device which is freely mounted and is provided with a second elevating link mechanism 46 which is directed forward from the rice transplanting apparatus side, and which is disposed at a lower front side of the bent frame body 44 via the second elevating link mechanism 46. A riding type rice transplanter with topsoil cultivation equipped with a 50 that can be adjusted up and down.

To mount the rice transplanting device 27 on the rear part of the riding type traveling vehicle body 1 via the first elevating link mechanism 17, a rear extension frame 44a extending long to the rear side of the rear member 20 of the first elevating link mechanism 17, A resilient frame body 44 having a substantially ┓ shape in side view, comprising a lower extension frame 44b extending downward from the rear portion of the rear extension frame 44a, is mounted, and the rice transplanting device 27 is rolled on the lower rear portion of the lower extension frame. A topsoil cultivation device which is freely mounted and is provided with a second elevating link mechanism 46 which is directed forward from the rice transplanting apparatus side, and which is disposed at a lower front side of the bent frame body 44 via the second elevating link mechanism 46. In the riding type rice transplanter with topsoil cultivation, which is mounted so as to be able to adjust up and down, the position of the planting portion of the rice cultivation device 27 is located at the rear side of the portion where the drive case 51 of the topsoil cultivation device 50 is arranged. Leveling Float 38 for leveling With topsoil plowing has been set riding type rice planting machine.

To mount the rice transplanting device 27 on the rear part of the riding type traveling vehicle body 1 via the first elevating link mechanism 17, a rear extension frame 44a extending long to the rear side of the rear member 20 of the first elevating link mechanism 17, A refracting frame body 44 having a substantially ┓ shape in side view, comprising a lower extension frame 44b extending downward from the rear portion of the rear extension frame 44a, is attached, and the rice transplanting device can be freely rolled on the lower rear portion of the lower extension frame. And a second raising / lowering link mechanism 46 which is mounted to the front of the refraction-shaped frame 44 via the second lifting / lowering link mechanism 46. In a riding type rice transplanter with topsoil cultivation, which is mounted so as to be able to move up and down, an even number of leveling floats 38 for leveling the planting portion of the rice transplanting device 27 are arranged at predetermined horizontal intervals. With the rear part on the 27 aircraft side The front part of the two floats 38a, 38a in the central portion are connected to each other, and the first part is moved up and down by the front part of the connected float 38a. The structure is such that the switching valve 26 of the hydraulic device 23 that operates the link mechanism 17 is switched, and the width L of the connection float interval is wider than the interval l between the other floats, and the riding type with top soil cultivation is used. Rice transplanter.

To mount the rice transplanting device 27 on the rear part of the riding type traveling vehicle body 1 via the first elevating link mechanism 17, a rear extension frame 44a extending long to the rear side of the rear member 20 of the first elevating link mechanism 17, A refracting frame body 44 having a substantially 側面 shape in side view, comprising a lower extension frame 44b extending downward from a rear portion of the rear extension frame 44a, is mounted, and the rice transplanting device 27 is rolled on the lower rear portion of the lower extension frame. A topsoil cultivation device which is freely mounted and is provided with a second elevating link mechanism 46 which is directed forward from the rice transplanting apparatus side, and which is disposed at a lower front side of the bent frame body 44 via the second elevating link mechanism 46. In a riding type rice transplanter with topsoil cultivation, which is mounted so that it can be raised and lowered, an even number of leveling floats 38 for leveling the location of the planting section of the rice transplanting device 27 are arranged at predetermined horizontal intervals. The rear part is supported on the fuselage side of the device 27. The front part of the two floats 38a, 38a in the central portion is connected to each other so that the front part can be freely moved up and down. The switching valve 26 of the hydraulic device 23 that operates the lifting link mechanism 17 is configured to be switched. The width L of the connection float interval is made wider than the interval 1 between the other floats, and the two connected two floats are connected. A riding type rice transplanter with topsoil cultivation, wherein a scraping and leveling device 42 is provided at the front position of the space between the floats so as to be vertically movable.

To mount the rice transplanting device 27 on the rear part of the riding type traveling vehicle body 1 via the first elevating link mechanism 17, a rear extension frame 44a extending long to the rear side of the rear member 20 of the first elevating link mechanism 17, A resilient frame body 40 having a substantially ┓ shape in side view, comprising a lower extension frame 44b extending downward from the rear portion of the rear extension frame 44a, is attached, and the rice transplanting device 27 is rolled on the lower rear portion of the lower extension frame. A topsoil cultivation device which is freely mounted and is provided with a second elevating link mechanism 46 which is directed forward from the rice transplanting apparatus side, and which is disposed at a lower front side of the bent frame body 44 via the second elevating link mechanism 46. In a riding type rice transplanter with topsoil cultivation, which is mounted so that it can be raised and lowered, an even number of leveling floats 38 for leveling the location of the planting section of the rice transplanting device 27 are arranged at predetermined horizontal intervals. The rear part is supported on the fuselage side of the device 27. The front part is attached to the front part so as to be movable up and down, and the front parts of the two floats 38a, 38a in the central part are connected to each other. A hydraulic device 23 that operates the first lifting link mechanism 17 so as to raise the rice transplanting device 27 when the front part moves upward beyond a predetermined range and conversely lowers the rice transplanting device 27 when moving downward below the predetermined range. Of the automatic switching mechanism for switching the switching valve 26 of the hydraulic device 23 when the second raising / lowering link mechanism 46 adjusts the topsoil cultivation device 50 to the lowering side. The elevation control device 59 of the topsoil cultivation device 50 and the switching mechanism of the switching valve 26 of the hydraulic device 23 are connected directly without the float 38a or via the float 38a so that the switching of the device ascending side becomes insensitive. Topsoil plowing with a riding type rice planting machine made by indirectly linked.