JP3817854B2

JP3817854B2 - Seedling planting equipment

Info

Publication number: JP3817854B2
Application number: JP23410197A
Authority: JP
Inventors: 塩崎　　孝秀
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 1997-08-29
Filing date: 1997-08-29
Publication date: 2006-09-06
Anticipated expiration: 2017-08-29
Also published as: JPH1175447A

Description

【０００１】
【発明の属する分野】
この発明は、苗載置台上のマット状の苗から一株分の苗を掻き取って圃場に植え付けていく苗植付装置に関するものである。
【０００２】
【従来の技術】
従来、田植機においては、３０×６０ｃｍ程度の広さで生育したマット苗から数本の苗を一株分として床土とともに一度に掻き取って圃場面に植え付けるように出来ている。そして、その苗を掻き取る植付爪は、通常、左右一対の棒状の杆が用いられる。マット苗は、草丈が７ｃｍ程度に生育した稚苗が用いられるが、寒冷地では根の発育が悪く、前後左右の苗の根がほとんどからまない。そのため、一株を構成する数本の苗が掻き取られたのち、圃場面に達するまでに分離するおそれがある。これを解消するため、上記の一対の棒状の植付爪に代えて、先端部の左右両端が下側に折り曲げられることにより側壁部が設けられた植付爪で一株分の苗床を左右の前記側壁部で抱えるようにしたものを用い、この植付爪が掻き取った苗を押し出すべく前記左右の側壁部の間で作動する苗押出具を設けて圃場に苗を植え付けるようにした苗植付装置がある（特開平８−１４０４３９号）。
【０００３】
【発明が解決しようとする課題】
ところが、上記の側壁部が設けられた植付爪と苗押出具とを備えた苗植付装置において、植付爪の先端部にある側壁部と苗押出具との隙間に圃場の土や小石等が詰まって植付爪や苗押出具を変形させたり苗押出具の作動が不適正になる恐れがある。
【０００４】
【課題を解決するための手段】
この発明は、上記の課題を解決するために、次の技術的手段を講じた。
すなわち、苗載置台（２０）上のマット状の苗から一株分の苗を掻き取る植付爪（４０）と該植付爪（４０）が掻き取った苗を押し出すべく作動する苗押出具（４１）とを備え、前記植付爪（４０）には上壁部（４０ａ）を備え、該植付爪（４０）の先端部には前記上壁部（４０ａ）から下側に延びる左右の側壁部（４０ｃ，４０ｃ）を備え、側面視において前記側壁部（４０ｃ，４０ｃ）と前記苗押出具（４１）とを少なくとも一部で重複するように設けた苗植付装置において、側面視で前記苗押出具（４１）の前記側壁部（４０ｃ，４０ｃ）と重複する部分が該苗押出具（４１）の押出の戻り作動端において側面視で前記側壁部（４０ｃ，４０ｃ）から突出するように設け、植付爪（４０）の切欠き部（４０ｄ）の側面（４０ｅ）を曲面形状とすると共に、苗押出具（４１）の苗押出部（４１ｂ）の苗押出基部（４１ｃ）の上面（４１ｅ）を上方に突出した曲面形状としていることを特徴とする苗植付装置とした。
【０００５】
【作用】
本発明の苗植付装置は、植付爪により苗載置台上のマット状の苗から一株分の苗を掻き取り、その掻き取った苗を苗押出具の作動により圃場に植え付ける。植付爪に掻き取られた苗は、植付爪の先端部の上壁部と左右の側壁部とにより一株分の苗がばらけないように苗植付装置に確実に保持され、前記側壁部の側方にある苗押出具の作動により確実に圃場に植え付けられる。そして、前記側壁部と苗押出具との間に圃場の泥土や小石等が詰まっても、側面視で前記の前記側壁部と重複する部分の少なくとも一部を該苗押出具の作動により側面視で前記側壁部と重複しないようにしているので、その重複しない苗押出具の部分から前記側壁部と前記苗押出具との間に詰まった圃場の土や小石等の脱落を促し、前記側壁部と前記苗押出具との間に圃場の土や小石等が詰まるのを抑制する。また、植付爪４０の切欠き部４０ｄの側面４０ｅを曲面形状としたので、植付爪４０が苗載置台２０上のマット状の苗を掻き取って保持したとき、前記切欠き部４０ｄにある苗の葉が該切欠き部４０ｄの側面４０ｅ部分で損傷するのを抑制できる。また、苗押出具４１の苗押出部４１ｂの苗押出基部４１ｃの上面４１ｅを上方に突出した曲面形状としたので、圃場の土や小石等が前記苗押出基部４１ｃの上面４１ｅに付着するようなことがあっても、前記苗押出基部４１ｃの上面４１ｅにおける左右方向の保持力が小さく前記苗押出基部４１ｃからの泥土や小石等の脱落を促す。
【０００６】
【発明の効果】
よって、植付爪の側壁部と苗押出具との間に圃場の土や小石等が詰まるのを抑制し、また苗の葉が植付爪４０の切欠き部４０ｄの側面４０ｅ部分で損傷するのを抑制し、更に苗押出具４１の苗押出部４１ｂの苗押出基部４１ｃからの泥土や小石等の脱落を促すので、植付爪や苗押出具が変形したり苗押出具の作動が不適正になるのを抑えることができる。
【０００７】
【実施例】
この発明の一実施例を図面に基づき説明する。
図１は、乗用型の田植機１を示すものであり、この乗用型の田植機１は、走行車体２と６条植えの苗植付部３とから構成される。
走行車体２の略中央に駆動源であるエンジン４が備えられ、該エンジン４の駆動により走行ミッションケ−ス５等を介して前輪６，６及び後輪７，７が駆動され、これらの前後輪６，６，７，７が駆動されて走行車体２が走行する。前記エンジン４の上方に操縦席８が備えられ、該操縦席８の前側にステアリングハンドル９が設けられている。この走行車体２の後部に昇降リンク機構１０が設けられ、該昇降リンク機構１０を介して前記苗植付部３が装着され、油圧昇降シリンダ１１の伸縮により上下に昇降するように設けられている。尚、走行車体側からの動力が植付クラッチケ−ス１２を介して前記苗植付部３に伝動されるようになっている。
【０００８】
また、操縦席前側のステップ部には有段操作される株間変速レバ−１３が設けられており、走行車体２の走行速度に対する苗植付部３の作動速度を変速できるようになっている。この株間変速レバ−１３により、植付作業者が圃場に移植する苗の植付株間を設定できるようになっている。従って、前記株間変速レバ−１３を操作しない限り、走行速度に比例した速度で前記苗植付部３が作動されるようになっている。
【０００９】
苗植付部３は、苗載置台２０と植付伝動部２１及び各条の苗植付装置２２，…とを備えて構成される。苗植付部３の下部には、センタ−フロ−ト２３及び両側部にサイドフロ−ト２４，２４が設けられており、該フロ−ト２３，２４，２４が圃場面を滑走する構成である。
また、苗植付部３は、植付伝動部２１からの動力により前記苗植付装置２２を作動する。前記苗載置台２０は、上部を苗載置台支持ロ−ラ２５，２５、下部を左右移動ガイド板２６により左右移動可能に支持されている。従って、苗植付部３は、苗載置台２０が固着された苗載置台左右移動棒２７を左右移動させて苗載置台２０を左右移動させ、マット状の苗を苗植付装置２２により一株づつ掻き取る構成となっている。尚、前記左右移動ガイド板２６には、苗植付装置２２，…の苗掻き取り口２６ａ，…が設けられている。また、前記苗載置台２０は、左右移動終端においてマット状の苗を各条の苗送りベルト２８，…により苗載置台２０に沿って苗植付装置側に順次移送する公知の構成である。
【００１０】
図１、図２に示すように、苗植付装置２２は、植付伝動部２１の植付伝動フレ−ム２９の端部から出力され機体の走行速度に比例して一定速度で回動する苗植付装置駆動軸３０の駆動により回転駆動する回転ケ−ス３１と該回転ケ−ス３１の両端部にそれぞれ装着された苗植付具３２，３２とを備えて構成され、該苗植付具３２，３２が前記苗掻き取り口２６ａ上の苗を掻き取り、掻き取った苗を圃場に植え付けていくようになっている。すなわち、前記回転ケ−ス３１が該苗植付装置駆動軸３０と一体回転するように取り付けられると共に、回転ケ−ス３１内の太陽ギヤ３３が前記植付伝動フレ−ム２９に対して回転しないように設けられ、回転ケ−ス３１の回動により該太陽ギヤ３３と噛み合う中間ギヤ３４，３４を前記太陽ギヤ３３回りに回動させ、前記中間ギヤ３４，３４の駆動により該中間ギヤ３４，３４と噛み合う最終ギヤ３５，３５を回動させ、該最終ギヤ３５，３５と一体回転する最終ギヤ回動軸３６，３６により前記苗植付具３２，３２を一体回転させ、前記回転ケ−ス３１の回動位置に対して前記苗植付具３２，３２の前後傾斜姿勢が決定される。尚、前記苗植付具３２が最終ギヤ３５と一体回転するようになっている。また、前記中間ギヤ３４，３４及び前記最終ギヤ３５，３５は、前記太陽ギヤ３３に対して対称位置に設けられてそれぞれの苗植付具３２，３２の前後傾斜姿勢を決定するようになっている。
【００１１】
また、前記太陽ギヤ３３と前記中間ギヤ３４，３４と前記最終ギヤ３５，３５とは非円形の偏心ギヤであると共にそれぞれ同歯数であり、回転ケ−ス３１の一回転につき前記中間ギヤ３４，３４及び前記最終ギヤ３５，３５が回動角速度を変えながらそれぞれ一回転する。従って、回転ケ−ス３１が一回転する間に、苗植付具３２，３２が回転ケ−ス３１の回動とは逆方向に該回転ケ−ス３１に対して一回転するようになっている。
【００１２】
前記苗植付具３２は、マット状の苗を一株分掻き取って保持する植付爪４０と該植付爪４０で分離して保持した苗を圃場面へ向けて押し出す苗押出具の一例である苗押出フォ−ク４１とを備えて構成される。前記回転ケ−ス３１の回動により苗植付具３２がル−プ軌跡を描いて前記苗掻き取り口２６ａを通過することにより、前記植付爪４０が苗掻き取り口２６ａにある苗を掻き取り保持するようになっている。苗押出フォ−ク４１は、苗の押出作用側に苗押出スプリング４２により付勢されると共に、苗植付具３２に対して回動する苗押出カム４３の回動により揺動軸４４ａ回りに揺動する苗押出ア−ム４４を揺動させ該ア−ム４４先端に係合して、苗植付具ケ−ス３２ａに対して摺動して押出作動するようになっている。尚、前記苗押出カム４３は回転ケ−ス３１に対して回動しないように設けられ、回転ケ−ス３１の一回転につき苗押出カム４４が苗植付具３２に対して一回転する構成となっている。
【００１３】
前記植付爪４０は、上壁部４０ａを備えて構成される。また、前記植付爪４０の上壁部４０ａには基部側に２個のボルト孔４０ｂ，４０ｂが設けられ、前記植付爪４０は前記２個のボルト孔４０ｂ，４０ｂを通す２本の締着ボルト４５，４５により前記苗植付具ケ−ス３２ａに取り付けられるようになっている。前記植付爪４０の先端部には、前記上壁部４０ａの左右両端部から下方へ突出して設けられた左右の側壁部４０ｃ，４０ｃが設けられている。また、前記上壁部４０ａの左右中央には、植付爪４０の先端部から基部側に向かって切欠き部４０ｄが設けられている。尚、前記切欠き部４０ｄは、前記左右の側壁部４０ｃ，４０ｃより植付爪４０の基部側にまで延設されると共に、植付爪４０の先端において前記上壁部４０ａの左右幅と略同一に構成され、植付爪４０の先端から基部側に向かうに従って左右幅が縮小され、所定の位置から基部側は一定の左右幅となっている。また、植付爪４０の前記先端部における前記上壁部４０ａの下側は、平面に構成されている。従って、図１０に示すように、植付爪４０の前記先端部において、横断面が左右一対のＬ字型で構成される苗保持部となっている。尚、前記切欠き部４０ｄの側面４０ｅは、曲面形状となっている。
【００１４】
また、前記上壁部４０ａの下面において、前記左右の側壁部４０ｃ，４０ｃの植付爪４０の基部側の端部４０ｆ，４０ｆの位置から植付爪４０の基部側にかけて左右にそれぞれ下側に突出した曲面形状部分４０ｇ，４０ｇが設けられている。
前記苗押出フォ−ク４１は、押出作動により前記苗植付具ケ−ス３２ａに対して摺動する丸軸部４１ａと該丸軸部４１ａの先端に固着された苗押出部４１ｂとを備えて構成される。前記苗押出部４１ｂには苗押出基部４１ｃと左右の苗押出プレ−ト４１ｄ，４１ｄとが設けられ、該苗押出プレ−ト４１ｄ，４１ｄの前端部が植付爪４０が保持した苗の苗床に当接して植付爪４０が保持した苗を押し出すようになっている。左右の前記苗押出プレ−ト４１ｄ，４１ｄは、植付爪４０の側壁部４０ｃ，４０ｃより左右内側の該側壁部４０ｃ，４０ｃの近傍に設けられ、該プレ−ト４１ｄ，４１ｄの上部が側面視で植付爪４０の前記側壁部４０ｃ，４０ｃと重複するように設けられている。また、図４に示すように、前記苗押出フォ−ク４１の押出作動における戻り作動端に位置する状態で、前記苗押出プレ−ト４１ｄ，４１ｄが、植付爪４０の側壁部４０ｃ，４０ｃの植付爪４０の基部側の端部４０ｆ，４０ｆから該苗押出プレ−ト４１ｄ，４１ｄの植付爪４０における基部側の端部である一部のみが突出するようになっている。尚、前記苗押出プレ−ト４１ｄ，４１ｄは、該プレ−ト４１ｄ，４１ｄの上部が前記苗押出フォ−ク４１が押出作動における押出作動端に位置する状態で植付爪４０の側壁部４０ｃ，４０ｃと側面視で重複するように設けられている。
【００１５】
また、苗押出部４１ｂの前記苗押出基部４１ｃの上面４１ｅは、前記苗押出プレ−ト４１ｄ，４１ｄの端部から植付爪４０の基部側にかけて上方に突出した曲面形状となっている。
以上により、この苗植付装置２２は、回転ケ−ス３１の回転により、上下方向のル−プ軌跡で旋回し植付爪４０により苗載置台２０の下部の苗掻き取り口２６ａから一株分の苗を掻き取ってその掻き取った苗を圃場面に移送し、苗押出フォ−ク４１が押出作動により圃場に苗を植え付ける。一株分の苗を掻き取るとき、苗床から上方に延びる苗の葉が植付爪４０の切欠き部４０ｄに入ると共に植付爪４０の先端部の上壁部４０ａと左右の側壁部４０ｃ，４０ｃとにより苗植付装置２２の苗植付具３２に一株分の苗床が保持され、圃場面に移送する苗の苗床が分離しないように確実に苗床を保持する。また、苗植付具３２に保持された苗は、前記左右の側壁部４０ｃ，４０ｃの左右内側近傍にある苗押出フォ−ク４１の苗押出プレ−ト４１ｄ，４１ｄの押出作動により確実に圃場に植え付けられる。
【００１６】
そして、前記側壁部４０ｃ，４０ｃと前記苗押出プレ−ト４１ｄ，４１ｄとの隙間に圃場の泥土や小石等が詰まっても、側面視で前記苗押出プレ−ト４１ｄ，４１ｄの前記側壁部４０ｃ，４０ｃと重複する部分の一部である植付爪４０の基部側となる端部を苗押出フォ−ク４１の戻り作動端で圃場面より上方に位置させると共に側面視で前記側壁部４０ｃ，４０ｃから突出させて該側壁部４０ｃ，４０ｃと重複しないようにしているので、その重複しない苗押出プレ−ト４１ｄ，４１ｄの植付爪４０の基部側となる端部から前記側壁部４０ｃ，４０ｃと前記苗押出プレ−ト４１ｄ，４１ｄとの間に詰まった圃場の土や小石等の脱落を促し、前記側壁部４０ｃ，４０ｃと前記苗押出プレ−ト４１ｄ，４１ｄとの間に圃場の土や小石等が詰まるのを抑制する。
【００１７】
よって、植付爪４０の側壁部４０ｃ，４０ｃと苗押出プレ−ト４１ｄ，４１ｄとの間に圃場の土や小石等が詰まるのを抑制するので、植付爪４０や苗押出フォ−ク４１が変形したり苗押出フォ−ク４１の作動が不適正になるのを抑えることができる。
尚、苗載置台２０の下部の苗掻き取り口２６ａから植付爪４０が苗を掻き取る状態の苗押出フォ−ク４１の戻り作動端で苗押出プレ−ト４１ｄ，４１ｄの前端（苗押出フォ−ク４１の先端側の端部）が植付爪４０の側壁部４０ｃ，４０ｃの側方にあるので、植付爪４０が掻き取った苗の苗床は植付爪４０の上壁部４０ａ、左右の側壁部４０ｃ，４０ｃ及び前記苗押出プレ−ト４１ｄ，４１ｄの前端に接触して確実に保持される。
【００１８】
また、苗押出フォ−ク４１の苗押出プレ−ト４１ｄ，４１ｄが作動しない部分となる左右の側壁部４０ｃ，４０ｃの植付爪４０の基部側の端部４０ｆ，４０ｆの位置から植付爪４０の基部側の部分は、側壁部４０ｃ，４０ｃがない上に上壁部４０ａの下面には左右にそれぞれ下側に突出した曲面形状部分４０ｇ，４０ｇが設けられているので、左右方向の保持力が小さくなり圃場の泥土や小石等が付着しても脱落しやすく、圃場の泥土や小石等が付着したり噛み込んだりすることが抑制される。従って、この植付爪４０の基部側の部分に付着したり噛み込んだりした圃場の泥土や小石等により植付爪４０の先端部で保持される苗が苗植付具３２の適正な位置あるいは苗植付具３２に対して適正な姿勢に保持されないことで、圃場に苗が適正な深さや適正な姿勢に植え付けられなかったり欠株を生じたりするのを抑制することができる。
【００１９】
また、植付爪４０の切欠き部４０ｄの側面４０ｅが曲面形状となっているので、植付爪４０が苗載置台上のマット状の苗を掻き取って保持したときに、前記切欠き部４０ｄにある苗の葉が該切欠き部４０ｄの側面４０ｅ部分で損傷するのを抑制している。
また、苗押出フォ−ク４１の苗押出部４１ｂの前記苗押出基部４１ｃの上面４１ｅが前記苗押出プレ−ト４１ｄ，４１ｄの端部から植付爪４０の基部側にかけて上方に突出した曲面形状となっているので、圃場の泥土や小石等が前記苗押出基部４１ｃの上面４１ｅに付着するようなことがあっても、前記苗押出基部４１ｃの上面４１ｅにおける左右方向の保持力が小さく前記苗押出基部４１ｃからの泥土や小石等の脱落を促す構成となっている。
【００２０】
ところで、図１１、図１２、図１３は、苗押出フォ−ク４１に苗持ち帰り防止具４２を装着した状態を示したものである。この苗持ち帰り防止具４２は、樹脂製であり、苗押出フォ−ク４１の苗押出部４１ｂに嵌め込んで装着するようになっている。前記苗持ち帰り防止具４２には植付爪４０の切欠き部４０ｄを上下方向に貫通する貫通部４２ａが設けられ、この貫通部４２ａが前記苗押出フォ−ク４１の作動により前記切欠き部４０ｄを前後方向に移動し、前記貫通部４２ａにより前記切欠き部４０ｄに詰まった圃場の泥土や小石等を苗植付具３２から除去させて脱落させるようになっている。これにより、植付爪４０の先端部で保持される苗の葉が植付爪４０の切欠き部４０ｄに詰まった圃場の泥土や小石等に当接することにより苗植付具３２の適正な位置あるいは苗植付具３２に対して適正な姿勢に保持されないことで、圃場に苗が適正な深さや適正な姿勢に植え付けられなかったり欠株を生じたりするのを抑制することができる。
【００２１】
尚、以上の実施例は乗用型の田植機の植付爪について記述したが、本発明は乗用型の田植機に限定されるものではない。
同様に、以上の実施例は回転ケ−スを備える苗植付装置について記述したが、本発明はこれに限定されるものではない。
【図面の簡単な説明】
【図１】乗用型の田植機の側面図
【図２】乗用型の田植機の平面図
【図３】回転ケ−スの側面断面図
【図４】苗植付具の側面断面図
【図５】植付爪の平面図
【図６】植付爪の側面図
【図７】植付爪の底面図
【図８】図５におけるＡ−Ａ断面図
【図９】図５におけるＢ−Ｂ断面図
【図１０】図５におけるＣ−Ｃ断面図
【図１１】苗持ち帰り防止具を装着した状態を示す苗植付具の一部の側面断面図
【図１２】苗持ち帰り防止具を装着した状態を示す苗植付具の一部の側面図
【図１３】苗持ち帰り防止具を装着した状態を示す苗植付具の一部の正面図
【符号の説明】
２０…苗載置台、２２…苗植付装置、４０…植付爪、４０ａ…上壁部、４０ｃ，４０ｃ…側壁部、４０ｄ…切欠き部、４０ｅ…切欠き部の側面、４０ｆ，４０ｆ…側壁部の植付爪における基部側の端部、４１…苗押出フォ−ク、４１ｂ…苗押出部、４１ｃ…苗押出基部、４１ｅ…苗押出基部の上面 [0001]
[Field of the Invention]
The present invention relates to a seedling planting apparatus that scrapes one seedling from a mat-like seedling on a seedling mounting table and plantes the seedling in a field.
[0002]
[Prior art]
Conventionally, in rice transplanters, several seedlings from a mat seedling grown in a size of about 30 × 60 cm are scraped at once with the floor soil and planted in a field scene. And as a planting nail which scrapes off the seedling, a pair of left and right bar-shaped cocoons is usually used. For mat seedlings, young seedlings having a plant height of about 7 cm are used, but in cold regions, root growth is poor and the roots of front, rear, left and right seedlings are hardly entangled. Therefore, after several seedlings constituting one strain are scraped off, they may be separated before reaching the farm scene. In order to solve this problem, instead of the pair of rod-shaped planting claws described above, the right and left ends of the tip portion are bent downward so that the nursery for one strain is left and right with the planting claws provided with side walls. A seedling planting that uses what is held by the side wall portion, and is provided with a seedling pushing tool that operates between the left and right side wall portions to push out the seedling scraped off by the planting claw so as to plant the seedling in the field. There is an attached device (Japanese Patent Laid-Open No. 8-140439).
[0003]
[Problems to be solved by the invention]
However, in the seedling planting device provided with the planting claw and the seedling pushing tool provided with the above-mentioned side wall part, the soil and pebbles in the field are placed in the gap between the side wall part and the seedling pushing tool at the tip of the planting claw. The planting claw and the seedling pusher may be deformed and the operation of the seedling pusher may be inappropriate.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has taken the following technical means.
That is, seedling pusher operating to push the Naeno table (20) on the mat-like scraping a share component seedlings from the seedling planting claw (40) and with claw plant (40) is scraped off seedlings (41) and wherein the top wall is in the planting claw (40) provided with a (40a), extending the upper wall portion at the tip portion of the claw with the plant (40) from (40a) to the lower right and left In the seedling planting apparatus provided with the side wall portions (40c, 40c), and provided so that the side wall portions (40c, 40c) and the seedling pushing tool (41) overlap at least partially in the side view. to in projecting from said side wall portion (40c, 40c) and the side wall as viewed from the side in back working end of the extrusion of the overlapping portions該苗pusher (41) of the seedling pusher (41) (40c, 40c) provided to, notch of the planting claw (40) the sides of (40d) (40e) curved With the Jo, and seedling planting apparatus characterized by seedling pushing portion of the upper surface (41e) of the seedlings extrusion base of (41b) (41c) has a curved shape projecting upward seedlings pusher (41) did.
[0005]
[Action]
The seedling planting apparatus of the present invention scrapes off one seedling from a mat-like seedling on a seedling mounting table with a planting claw, and plants the scraped seedling on a field by operating a seedling pushing tool. The seedling scraped off by the planting nail is securely held by the seedling planting device so that the seedling for one strain is not scattered by the upper wall portion and the left and right side wall portions of the tip of the planting nail, It is reliably planted in the field by the operation of the seedling pusher on the side of the side wall. Even when mud, pebbles or the like in the field are clogged between the side wall portion and the seedling pushing tool, at least a part of the portion overlapping with the side wall portion in the side view is actuated by the operation of the seedling pushing tool. In order not to overlap with the side wall portion, the side wall portion is urged to drop off soil, pebbles, etc. in the field between the side wall portion and the seedling extrusion tool from the non-overlapping portion of the seedling extrusion tool. And clogging soil, pebbles and the like in the field. In addition, since the side surface 40e of the notch 40d of the planting claw 40 has a curved shape, when the planting claw 40 scrapes and holds the mat-like seedling on the seedling mounting table 20, the notch 40d It can suppress that the leaf of a certain seedling is damaged in the side surface 40e part of this notch part 40d. Moreover, since the upper surface 41e of the seedling extrusion base 41c of the seedling extrusion part 41b of the seedling extrusion tool 41 has a curved shape protruding upward, soil, pebbles, etc. in the field are attached to the upper surface 41e of the seedling extrusion base 41c. Even in such a case, the holding force in the left-right direction on the upper surface 41e of the seedling extrusion base 41c is small, and the removal of mud, pebbles and the like from the seedling extrusion base 41c is urged.
[0006]
【The invention's effect】
Therefore, clogging of soil soil, pebbles, etc. between the side wall portion of the planting claw and the seedling pushing tool is suppressed, and the seedling leaf is damaged at the side surface 40e portion of the notched portion 40d of the planting claw 40. In addition, the removal of mud and pebbles from the seedling extrusion base 41c of the seedling extrusion part 41b of the seedling extrusion tool 41 is promoted, so that the planting claw and the seedling extrusion tool are deformed and the operation of the seedling extrusion tool is disabled. It can suppress becoming appropriate.
[0007]
【Example】
An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a riding type rice transplanter 1, which is composed of a traveling vehicle body 2 and a 6-row seedling planting part 3.
An engine 4 as a drive source is provided at the approximate center of the traveling vehicle body 2, and the front wheels 6, 6 and the rear wheels 7, 7 are driven by the driving of the engine 4 through the traveling mission case 5. The traveling vehicle body 2 travels by driving the wheels 6, 6, 7, 7. A cockpit 8 is provided above the engine 4, and a steering handle 9 is provided on the front side of the cockpit 8. An elevating link mechanism 10 is provided at the rear part of the traveling vehicle body 2, and the seedling planting part 3 is mounted via the elevating link mechanism 10, and is provided so as to be moved up and down by expansion and contraction of the hydraulic elevating cylinder 11. . The power from the traveling vehicle body side is transmitted to the seedling planting portion 3 through the planting clutch case 12.
[0008]
Further, an inter-stock shift lever 13 that is operated stepwise is provided at the step portion in front of the cockpit, so that the operating speed of the seedling planting section 3 with respect to the traveling speed of the traveling vehicle body 2 can be changed. With this inter-strain shift lever 13, the planting operator can set the planting strains of seedlings to be transplanted in the field. Therefore, unless the inter-strain shift lever 13 is operated, the seedling planting unit 3 is operated at a speed proportional to the traveling speed.
[0009]
The seedling planting unit 3 includes a seedling mounting table 20, a planting transmission unit 21, and seedling planting devices 22 for each strip. At the lower part of the seedling planting part 3, a center float 23 and side floats 24, 24 are provided on both sides, and the floats 23, 24, 24 are configured to slide in a field scene. .
In addition, the seedling planting unit 3 operates the seedling planting device 22 by the power from the planting transmission unit 21. The seedling mounting table 20 is supported by a seedling mounting table support rollers 25 and 25 at the upper part and a left and right movement guide plate 26 at the lower part so as to be movable left and right. Accordingly, the seedling planting unit 3 moves the seedling placement table left / right moving rod 27 to which the seedling placement table 20 is fixed to the left and right to move the seedling placement table 20 left and right. It is configured to scrape stocks one by one. The left and right moving guide plate 26 is provided with seedling scraping openings 26a of the seedling planting devices 22,. The seedling mounting table 20 has a known configuration in which mat-shaped seedlings are sequentially transferred to the seedling planting device side along the seedling mounting table 20 by the seedling feeding belts 28,.
[0010]
As shown in FIGS. 1 and 2, the seedling planting device 22 is output from the end of the planting transmission frame 29 of the planting transmission unit 21 and rotates at a constant speed in proportion to the traveling speed of the machine body. The seedling planting apparatus includes a rotating case 31 that is rotated by driving the driving shaft 30 and seedling planting tools 32 and 32 that are respectively attached to both ends of the rotating case 31. The attachments 32, 32 scrape off the seedling on the seedling scraping opening 26a, and plant the scraped seedling on the field. That is, the rotary case 31 is attached so as to rotate integrally with the seedling planting device drive shaft 30 and the sun gear 33 in the rotary case 31 rotates with respect to the planting transmission frame 29. The intermediate gears 34 and 34 that are provided so as not to be engaged and mesh with the sun gear 33 by the rotation of the rotary case 31 are rotated about the sun gear 33, and the intermediate gear 34 is driven by the driving of the intermediate gears 34 and 34. , 34 is rotated, and the seedling planting tools 32, 32 are integrally rotated by the final gear rotating shafts 36, 36 that rotate integrally with the final gears 35, 35, thereby rotating the rotation cage. The forward and backward inclined postures of the seedling planting tools 32, 32 are determined with respect to the rotational position of the support 31. Note that the seedling planting tool 32 rotates integrally with the final gear 35. In addition, the intermediate gears 34 and 34 and the final gears 35 and 35 are provided at symmetrical positions with respect to the sun gear 33 so as to determine the front and rear inclined postures of the respective seedling planting tools 32 and 32. Yes.
[0011]
The sun gear 33, the intermediate gears 34 and 34, and the final gears 35 and 35 are non-circular eccentric gears and have the same number of teeth, respectively, and the intermediate gear 34 per rotation of the rotary case 31. , 34 and the final gears 35, 35 rotate one time while changing the rotational angular velocity. Therefore, while the rotary case 31 makes one rotation, the seedling planting tools 32 and 32 rotate once with respect to the rotary case 31 in the direction opposite to the rotation of the rotary case 31. ing.
[0012]
The seedling planting tool 32 is an example of a planting claw 40 that scrapes and holds a mat-like seedling for one stock, and a seedling pushing tool that extrudes the seedling separated and held by the planting claw 40 toward a field scene. And a seedling extrusion fork 41. By the rotation of the rotary case 31, the seedling planting tool 32 draws a loop trajectory and passes through the seedling scraping opening 26a, so that the planting claw 40 scrapes off the seedling in the seedling scraping opening 26a. It comes to hold. The seedling pushing fork 41 is urged by the seedling pushing spring 42 toward the seedling pushing action side, and is rotated around the swinging shaft 44a by the turning of the seedling pushing cam 43 that turns with respect to the seedling planting tool 32. The swinging seedling pushing arm 44 is swung, engaged with the tip of the arm 44, and slid with respect to the seedling planting case 32a to be pushed out. The seedling pushing cam 43 is provided so as not to rotate with respect to the rotating case 31, and the seedling pushing cam 44 rotates once with respect to the seedling planting tool 32 for each rotation of the rotating case 31. It has become.
[0013]
The planting claw 40 includes an upper wall portion 40a. Further, the upper wall portion 40a of the planting claw 40 is provided with two bolt holes 40b, 40b on the base side, and the planting claw 40 has two fastening holes through which the two bolt holes 40b, 40b are passed. It is attached to the seedling planting tool case 32a by wearing bolts 45, 45. Left and right side wall portions 40c and 40c are provided at the distal end portion of the planting claw 40 so as to protrude downward from both left and right end portions of the upper wall portion 40a. In addition, a notch 40d is provided in the center of the left and right of the upper wall 40a from the tip of the planting claw 40 toward the base. The notch portion 40d extends from the left and right side wall portions 40c, 40c to the base side of the planting claw 40, and is substantially the same as the lateral width of the upper wall portion 40a at the tip of the planting claw 40. The left and right widths are configured to be the same, and the left and right widths are reduced from the tip of the planting claw 40 toward the base side. Further, the lower side of the upper wall portion 40a at the tip end portion of the planting claw 40 is configured as a flat surface. Therefore, as shown in FIG. 10, in the said front-end | tip part of the planting nail | claw 40, the cross section is a seedling holding part comprised by a left-right paired L shape. In addition, the side surface 40e of the notch 40d has a curved surface shape.
[0014]
Further, on the lower surface of the upper wall portion 40a, the left and right side wall portions 40c, 40c are respectively leftward and downward from the positions of the end portions 40f, 40f on the base side of the planting claws 40 to the base side of the planting claws 40. Projected curved surface portions 40g, 40g are provided.
The seedling extrusion fork 41 includes a round shaft portion 41a that slides with respect to the seedling planting case 32a by an extrusion operation, and a seedling extrusion portion 41b fixed to the tip of the round shaft portion 41a. Configured. The seedling extruding part 41b is provided with a seedling extruding base 41c and left and right seedling extruding plates 41d, 41d, and the seedling bed of the seedling that the front ends of the seedling extruding plates 41d, 41d are held by the planting claws 40 is provided. The seedlings held by the planting claws 40 are pushed out in contact with each other. The left and right seedling extrusion plates 41d and 41d are provided in the vicinity of the side wall portions 40c and 40c on the left and right inner sides of the side wall portions 40c and 40c of the planting claw 40, and the upper portions of the plates 41d and 41d are side surfaces. It is provided so that it may overlap with the said side wall parts 40c and 40c of the planting nail | claw 40 by visual observation. Further, as shown in FIG. 4, the seedling extrusion plates 41 d and 41 d are positioned at the return operation end in the extrusion operation of the seedling extrusion fork 41 so that the side wall portions 40 c and 40 c of the planting claw 40 Only a part of the base side end of the seedling extruding plate 41d, 41d is projected from the base side end 40f, 40f of the planting claw 40. The seedling extruding plates 41d and 41d are arranged such that the upper portions of the plates 41d and 41d are side walls 40c of the planting claws 40 in a state where the seedling extruding fork 41 is positioned at the extrusion operation end in the extrusion operation. , 40c so as to overlap in side view.
[0015]
In addition, the upper surface 41e of the seedling extrusion base 41c of the seedling extrusion part 41b has a curved shape protruding upward from the end of the seedling extrusion plates 41d and 41d to the base side of the planting claw 40.
As described above, the seedling planting apparatus 22 is rotated by the rotation of the rotary case 31 and swung along the loop trajectory in the vertical direction, and the planting claw 40 is used for one stock from the seedling scraping opening 26a below the seedling mounting table 20. The seedlings are scraped off and transferred to the field scene, and the seedling extrusion fork 41 plants the seedlings in the field by the extrusion operation. When scraping off one seedling, the leaves of the seedling extending upward from the seedbed enter the notch 40d of the planting claw 40 and the upper wall 40a and the left and right side walls 40c of the tip of the planting claw 40, The seedbed for one strain is held by the seedling planting tool 32 of the seedling planting device 22 by 40c, and the seedbed is securely held so that the seedbeds of the seedlings transferred to the farm scene are not separated. In addition, the seedlings held by the seedling planting tool 32 are reliably brought into the field by the pushing operation of the seedling pushing plates 41d and 41d of the seedling pushing fork 41 near the left and right inner sides of the left and right side wall portions 40c and 40c. To be planted.
[0016]
And even if mud, pebbles and the like in the field are clogged in the gap between the side wall portions 40c, 40c and the seedling extrusion plate 41d, 41d, the side wall portion 40c of the seedling extrusion plate 41d, 41d in a side view. , 40c, the end portion of the planting claw 40 that is a part of the overlapping portion is positioned above the field at the return operation end of the seedling pushing fork 41, and the side wall portion 40c, Since it protrudes from 40c so as not to overlap with the side wall portions 40c, 40c, the side wall portions 40c, 40c from the end portion on the base side of the planting claw 40 of the non-overlapping seedling extrusion plates 41d, 41d. And the seedling extruding plates 41d and 41d are urged to remove soil, pebbles, etc., and the soil in the field is placed between the side wall portions 40c and 40c and the seedling extruding plates 41d and 41d. Or pebbles Suppress.
[0017]
Therefore, clogging of soil, pebbles and the like in the field between the side wall portions 40c and 40c of the planting claw 40 and the seedling extrusion plates 41d and 41d is suppressed. Can be prevented from being deformed and the operation of the seedling extrusion fork 41 is inappropriate.
It should be noted that the front end of the seedling extrusion plates 41d and 41d (the seedling extrusion plate) at the return operation end of the seedling extrusion fork 41 in a state in which the planting claws 40 scrape the seedling from the seedling scraping opening 26a at the lower portion of the seedling mounting table 20. -The end portion of the tip 41 side) is on the side of the side wall portions 40c, 40c of the planting claw 40, so that the seedbed of the seedling scraped off by the planting claw 40 is the upper wall portion 40a of the planting claw 40, The left and right side wall portions 40c, 40c and the front ends of the seedling extrusion plates 41d, 41d are brought into contact with each other and securely held.
[0018]
Also, the planting claws are positioned from the positions of the end portions 40f, 40f on the base side of the planting claws 40 of the left and right side wall portions 40c, 40c, which are portions where the seedling extrusion plates 41d, 41d of the seedling extrusion fork 41 do not operate. The base portion 40 has no side wall portions 40c and 40c, and the lower surface of the upper wall portion 40a is provided with curved shape portions 40g and 40g that protrude downward on the left and right sides. Even if mud, pebbles, etc. in the field are attached and the force is reduced, it is easy to fall off, and mud, pebbles, etc. in the field are prevented from adhering or biting. Therefore, the seedling held at the tip of the planting claw 40 by the mud, pebbles, etc. of the field that is attached or bitten to the base side portion of the planting claw 40 is appropriately positioned on the seedling planting tool 32 or By not being held in a proper posture with respect to the seedling planting tool 32, it is possible to suppress the seedling from being planted in a proper depth or a proper posture in the field or from causing a stock loss.
[0019]
Moreover, since the side surface 40e of the notch 40d of the planting claw 40 has a curved surface shape, when the planting claw 40 scrapes and holds the mat-like seedling on the seedling mounting table, the notch The seedling leaves at 40d are prevented from being damaged at the side surface 40e portion of the notch 40d.
The upper surface 41e of the seedling extrusion base portion 41c of the seedling extrusion portion 41b of the seedling extrusion fork 41 protrudes upward from the end portions of the seedling extrusion plates 41d and 41d to the base side of the planting claws 40. Therefore, even if mud, pebbles, etc. in the field may adhere to the upper surface 41e of the seedling extrusion base 41c, the holding force in the left-right direction on the upper surface 41e of the seedling extrusion base 41c is small and the seedling It has a configuration that facilitates the removal of mud, pebbles, and the like from the extrusion base 41c.
[0020]
11, 12, and 13 show a state where the seedling take-out prevention tool 42 is attached to the seedling push-out fork 41. The seedling take-out prevention tool 42 is made of resin, and is fitted into the seedling pushing portion 41b of the seedling pushing fork 41 to be attached. The seedling take-out prevention tool 42 is provided with a through portion 42a that vertically penetrates the notch portion 40d of the planting claw 40, and this through portion 42a is operated by the seedling push-out fork 41 to form the notch portion 40d. Are moved in the front-rear direction, and the mud, pebbles and the like in the field clogged in the notch 40d are removed from the seedling planting tool 32 by the through-hole 42a and dropped. Thereby, the leaf of the seedling held at the tip of the planting claw 40 comes into contact with mud, pebbles, etc. in the field clogged with the notch 40d of the planting claw 40, so that the seedling planting tool 32 is properly positioned. Or it can suppress that a seedling is not planted in a proper depth and a proper posture in a field, or a lack of a stock arises by not being held in a proper posture to seedling planting tool 32.
[0021]
In addition, although the above Example described the planting nail | claw of the riding type rice transplanter, this invention is not limited to a riding type rice transplanter.
Similarly, although the above example was described about the seedling planting apparatus provided with a rotation case, this invention is not limited to this.
[Brief description of the drawings]
[Fig. 1] Side view of riding type rice transplanter [Fig. 2] Plan view of riding type rice transplanter [Fig. 3] Side view of rotating case [Fig. 4] Side view of seedling transplanter [Fig. 5] Plan view of the planting claw [Fig. 6] Side view of the planting claw [Fig. 7] Bottom view of the planting claw [Fig. 8] AA sectional view in Fig. 5 [Fig. 9] BB in Fig. 5 FIG. 10 is a cross-sectional view taken along the line CC in FIG. 5. FIG. 11 is a side cross-sectional view of a part of the seedling planting tool showing a state where the seedling take-out prevention device is attached. Side view of a part of the seedling planting tool showing the state [Fig. 13] Front view of a part of the seedling planting tool showing the state of wearing the seedling take-out prevention tool [Explanation of symbols]
DESCRIPTION OF SYMBOLS 20 ... Seedling mounting stand, 22 ... Seedling planting device, 40 ... Planting claw, 40a ... Upper wall part, 40c, 40c ... Side wall part, 40d ... Notch part, 40e ... Side surface of notch part, 40f, 40f ... End of base side in planting claw of side wall part, 41 ... seedling extrusion fork , 41b ... seedling extrusion part, 41c ... seedling extrusion base, 41e ... top surface of seedling extrusion base

Claims

A planting claw (40) for scraping off one seedling from a mat-like seedling on the seedling mounting table (20) and a seedling pushing tool (41 ) that operates to push out the seedling scraped off by the planting claw (40). ) and wherein the top wall is in the planting claw (40) provided with a (40a), the left and right side walls of which extend downward from the top wall portion at the distal end portion (40a) of the pawl with the plant (40) In the seedling planting apparatus provided with a portion (40c, 40c) and provided so that the side wall portion (40c, 40c) and the seedling pusher (41) overlap at least partially in side view, the side wall portion of the seedling pusher (41) (40c, 40c) such that the overlapping portions are protruding from the side wall portion in a side view (40c, 40c) in the extrusion of back working end of該苗pusher (41) provided to notch the planting claw (40) the side (40e) of (40d) and a curved shape Both seedling planting apparatus which is characterized in that as a curved shape that the upper surface of (41e) protruding upward seedlings extruded base (41c) of the seedling pushing portion (41b) of the seedling pusher (41).