JP2004261081A - Seedling-planting apparatus - Google Patents

Seedling-planting apparatus Download PDF

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Publication number
JP2004261081A
JP2004261081A JP2003054668A JP2003054668A JP2004261081A JP 2004261081 A JP2004261081 A JP 2004261081A JP 2003054668 A JP2003054668 A JP 2003054668A JP 2003054668 A JP2003054668 A JP 2003054668A JP 2004261081 A JP2004261081 A JP 2004261081A
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JP
Japan
Prior art keywords
gear
seedling
final
counter
rotating body
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JP2003054668A
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Japanese (ja)
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JP2004261081A5 (en
JP4496706B2 (en
Inventor
Takahide Shiozaki
塩崎  孝秀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
Original Assignee
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
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Application filed by Iseki and Co Ltd, Iseki Agricultural Machinery Mfg Co Ltd filed Critical Iseki and Co Ltd
Priority to JP2003054668A priority Critical patent/JP4496706B2/en
Priority to CNB200410003752XA priority patent/CN1295952C/en
Priority to KR1020040005960A priority patent/KR100694651B1/en
Publication of JP2004261081A publication Critical patent/JP2004261081A/en
Publication of JP2004261081A5 publication Critical patent/JP2004261081A5/ja
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Publication of JP4496706B2 publication Critical patent/JP4496706B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling-planting apparatus in which seedling-planting members for two seedling rows can accurately be operated in a rotary case without adding an excessive force to an operation mechanism. <P>SOLUTION: This seedling-planting apparatus is characterized by rotatably disposing lateral final shafts 25 deviated from a rotation center shaft in a rotator 21 rotated on a lateral rotation center axis, integrally attaching the seedling-planting members to projections laterally projected from the rotator 21 on the final shafts 25, and transmitting powers to final gears 39 integrally rotated with the final shafts 25 through a row of gears 35, 36, 37, 38, and 39. A fixed gear 40 engaged with the rotation gear to determine the orbit of the rotation gear is disposed as an inner gear, and the final shafts 25 are disposed on the inside of the fixed gear 40. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、田植機等の苗移植機に設けられる苗植付装置に関する。
【0002】
【従来の技術】
左右方向の植付駆動軸を回転中心にして回転するロータリケースに苗植付具が設けられ、該苗植付具が円軌道上を移動しながら苗を植付けるロータリ苗植付装置は、例えば特許文献1に記載されているように、一般的には1個のロータリケース(回転ケース)21に苗植付具(移植具)30が1条分だけ設けられている。これは、植付駆動軸(回転軸)22へ伝動する植付伝動ケース12がロータリケースの側方近傍に設けられるため、ロータリケース21の左右両側に苗植付具30を設けることができないからである。
【0003】
【特許文献1】
特公平7−112381号公報
【0004】
特殊な例としては、特許文献2に示すように、左右並列に設けた2個のロータリケース21,21同士、又はロータリケース21と回転体65とを左右方向の軸51で結び、この軸51に苗植付具22を取り付けた構成がある。この構成であれば、1個のロータリケースで2条以上の苗植付具を作動させることも可能である。
【0005】
【特許文献2】
実開昭62−91926号公報
【0006】
【発明が解決しようとする課題】
特許文献1に代表される構成の場合、植付条数と同数だけロータリケースが必要であるから、全体の部品点数が多くコスト高になるという問題点があった。一方、特許文献2の構成は、ロータリケース1個当たり2条以上の苗植付具を設けられるので上記問題点は解決できるが、苗植付具を取り付ける軸51に捩じれや撓みが生じやすく、それに起因する破損や植付精度の低下が起きることが想像される。そこで本発明では、1個のロータリケースで2条の苗植付具を作動させることができ、しかもその作動機構に無理な力がかからず正確に作動させられる苗植付装置を提供することを課題としている。
【0007】
【課題を解決するための手段】
上記課題に対して本発明は下記の構成とした。すなわち、請求項1に記載の苗植付装置は、左右方向の回転中心線回りに回転する回転体に前記回転中心線に対し偏心した左右方向の最終軸を回転自在に設け、その最終軸における回転体から左右に突出する突出部に苗植付具を一体に取り付けるとともに、前記最終軸と一体回転する最終ギヤへ前記回転体に設けたギヤ列を介して伝動するようにしたことを特徴としている。
【0008】
回転体が回転中心線回りに回転することにより、苗植付具が円軌道を移動する。その際、苗植付具が取り付けられている最終軸がギヤ列を介して伝動されることにより、苗植付具の姿勢が適宜変化して円軌道上の移動位置に応じた適正姿勢を保持する。ギヤ列を回転体に設けることにより、最終軸を回転体から左右両側に突出させ、その左右両突出部に苗植付具を設けることが可能になる。
【0009】
請求項2に記載の苗植付装置は、請求項1の内容に加え、ギヤ列を側面視で最終軸と重複しない位置に配置する構成とした。
【0010】
請求項3に記載の苗植付装置は、請求項1又2の内容に加え、ギヤ列は、回転体の回転中心線を中心とする円軌道を移動しながら回転する回転ギヤと、該回転ギヤと一体回転する中間ギヤと、該中間ギヤに噛合する第一カウンタギヤと、該第一カウンタギヤと一体回転し最終ギヤに噛合する第二カウンタギヤとからなり、第一カウンタギヤ、第二カウンタギヤ、最終ギヤ及び最終軸の組み合わせを複数組設けて、回転体の回転中心線を中心とする円周上に複数の苗植付具を設けた構成とし、或る組の第一カウンタギヤ及び第二カウンタギヤの回転中心軸に他の組の第一カウンタギヤ又は第二カウンタギヤが側面視で重複しない配置とするとともに、異なる2組の第一カウンタギヤ及び第二カウンタギヤの回転中心軸の相互間隔を第一カウンタギヤ又は第二カウンタギヤの直径の2倍よりも小さい構成とした。
【0011】
請求項4に記載の苗植付装置は、請求項1乃至3のいずれかの内容に加え、回転ギヤと噛合して該回転ギヤの軌道を決定する固定ギヤを内歯ギヤとし、その固定ギヤの内側に最終軸を設けた構成とした。
【0012】
請求項5に記載の苗植付装置は、請求項1乃至4のいずれかの内容に加え、回転体を外側から回転自在に支持する固定支持体と、回転体を回転中心線回りに回転させるように駆動する駆動ギヤとが側面視で重複しない配置とした。
【0013】
請求項6に記載の苗植付装置は、請求項1乃至5のいずれかの内容に加え、回転体と固定ギヤとが側面視で重複しない配置とした。
【0014】
請求項7に記載の苗植付装置は、請求項5又6の内容に加え、最終ギヤと固定支持体とが側面視で重複しない配置とした。
【0015】
請求項8に記載の苗植付装置は、請求項5乃至7のいずれかの内容に加え、固定ギヤが固定支持体に回り止めされている構成とした。
【0016】
【発明の効果】
請求項1乃至8の構成とすると、回転体の左右両側に苗植付具を設けられるので、1個の回転体を複数条(通常は2条)で兼用させ、苗植付装置全体の軽量化、コストダウンを図ることが可能となるとともに、ギヤ列の各ギヤをあまり左右にずらさずに配置することができるので、苗植付具への伝動が安定し植付精度が向上する。
【0017】
請求項2乃至8の構成とすることにより、比較的簡単なギヤ列の構成で、請求項1の構成を実現できる。詳しくは、請求項3の構成とすれば、複数組設けられた第一カウンタギヤ、第二カウンタギヤ、最終ギヤ及び最終軸の組み合わせにおける異なる2組の第一カウンタギヤ及び第二カウンタギヤの回転中心軸間隔を狭くして回転体を小型化でき、苗植付具の作動安定化、高速化、コストダウンが図れる。また、請求項4の構成とすれば、ギヤ列を回転体に無理なく設けることができる。
【0018】
特に、請求項5の場合は、固定支持体に対し回転体を駆動ギヤごと着脱することができ、請求項6の場合は、上記回転体の着脱時に固定ギヤが邪魔にならず、請求項7の場合は、固定支持体に対し回転体を最終ギヤごと着脱することができ、これらにより苗植付装置の組み付けが容易になる。さらに、請求項8の場合は、簡単な構造でありながら固定ギヤの回り止めを確実にできるという効果がある。
【0019】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づき説明する。
図1及び図2は本発明の苗植付装置を装備した乗用田植機を表している。この乗用田植機1は、エンジン2を搭載し駆動回転する各左右一対の前輪3,3及び後輪4,4を備えた走行車体5の後方に、昇降リンク装置6を介して6条植の苗植付部7が連結されている。図中の符号8は操縦座席、9は前輪3,3を操向するステアリングハンドル、10は予備の苗を載せておく予備苗載台である。
【0020】
苗植付部7は、走行車体5から伝動入力される伝動ケース12の上側に前部が上位となるように傾斜した苗載台13を設けるとともに、伝動ケース12の植付伝動部12a,…の後端部に2条ごとで1組の苗植付装置14,…を設けている。フロート15,…を接地させた状態で機体を進行させると、苗載台13が左右に往復移動して台上のマット苗を苗載台下端側の苗取出口16,…に一株づつ順次供給し、それを苗植付装置14,…が掻き取って圃場に植付ける。
【0021】
苗植付装置14は、図3乃至図9に示す構成となっている。植付伝動部12aの後端に側面視環状の固定支持体20が一体に設けられ、その内側に左右の分割体21L,21Rからなる回転体としてのロータリケース21がベアリング22及びブッシュ23を介して回動自在に嵌合している。ロータリケース21には、その回転中心線24を中心とする円周上に互いに180度の位相で2本の最終軸25,25が回動自在に設けられ、それぞれの最終軸25,25のロータリケース21から突出する左右両端部に苗植付具26,26が一体に取り付けられている。
【0022】
ロータリケース21の左右分割体21L,21Rの間には、該ケースを駆動する駆動ギヤ30が設けられている。この駆動ギヤ30は、植付伝動部12a内のチェーン31を介して伝動される軸32に取り付けた伝動ギヤ33と噛み合い、一定方向に一定速度で回転する。
【0023】
また、ロータリケース21内には、最終軸25,25へ伝動するためのギヤ列が設けられている。このギヤ列は、ロータリケース21の回転中心線24を中心とする円軌道を移動しながら回転する回転ギヤ35と、該回転ギヤと一体回転する中間ギヤ36と、該中間ギヤに噛合する第一カウンタギヤ37,37と、該第一カウンタギヤと一体回転する第二カウンタギヤ38,38と、最終軸25,25に取り付けられ第二カウンタギヤと噛合する最終ギヤ39,39とからなっている。第一カウンタギヤ37、第二カウンタギヤ38、及び最終ギヤ39の組み合わせは2組設けられており、中間ギヤ36の回転が2系統に分岐して2本の最終軸25へそれぞれ伝達される。回転ギヤ35は、固定支持体20に固定された内歯の固定ギヤ40と噛合し、ロータリケース21の回転に連動して前記作動をするようになっている。
【0024】
駆動ギヤ30が回転すると、それと一体のロータリケース21も回転し、一対の苗植付具26,26が円軌道を移動する。そのとき、ロータリケース21の回転に連動する回転ギヤ35の作動がギヤ列を介して最終軸25,25へ伝達され、苗植付具26,26の姿勢が変化する。第二カウンタギヤ38及び最終ギヤ39は非円形ギヤであるため、苗植付具26の姿勢変化には緩急が生じる。結果的に、苗植付具26は図10乃至図15に示すように姿勢を変化する。これを一つの図にまとめて表すと図16のようになる。苗植付具26は逐次姿勢を変えつつ、後記苗分離爪47の先端が軌跡Pを描くように作動する。苗分離爪47の移動速度は、苗取出位置A及び苗植付位置B付近で遅く、両位置A,B間は速くなっている。機体の移動を加味した苗分離爪47の先端動軌跡P′は図17のようになる。
【0025】
また、ロータリケース21の内部には、最終軸25に一体回転するように取り付けた制動カム42と、該制動カムの外周面に当接する制動アーム43と、該制動アームを制動カム42に押し付けるスプリング44とからなる2組の位相ずれ防止機構が設けられている。この位相ずれ防止機構は、苗植付具26が苗取出位置A及び苗植付位置Bにある時に最終ギヤ39の回転を制動し、各ギヤ間のバックラッシュを吸収して、後述する苗分離及び苗植付の動作が正確に行われように作用する。なお、スプリング44は、2組の位相ずれ防止機構で共用である。
【0026】
苗植付具26は、コッタピン46により最終軸25に一体作動するように取り付けられている。苗植付具26には、先端部が鋭利に形成された二股フォーク状の苗分離爪47と、該苗分離爪の下側で突出・後退作動をする苗押出体48とが設けられている。
【0027】
苗押出体48の作動機構は次のようになっている。すなわち、最終軸25に回転自在に嵌合する押出カム50の外周面に、アーム軸51に回動自在に軸支されたカムアーム52が摺接している。また、アーム軸51にはカムアーム52と一体に回動する押出規制アーム53が軸支されていて、該押出規制アームの先端部と苗押出体48を支持する押出ロッド54の端部とが継手部材55を介して連結されている。継手部材55は、押出ロッド54を突出させる側に押出スプリング56によって付勢されている。
【0028】
最終軸25が回転すると、該軸に対し押出カム50が相対的に回転し、押出カム50とカムアーム52とからなるカム機構の働きで押出規制アーム53が揺動する。押出スプリング56を圧縮する位置に押出規制アーム53があるときは、苗押出体48が後退した状態にある。その位置から押出規制アーム53が回動して押出スプリング56の圧縮が緩和されると、押出スプリング56の弾発力で押出ロッド54が押し出され、苗押出体48が突出する。
【0029】
乗用田植機1での作業時、前述したように、一対の苗植付具26,26が先端軌跡Pを描きながら同一軌道上を互いに1/2周期の間隔を保ったまま移動する。苗取出位置Aで苗分離爪47が苗取出口16の苗を一株分に分割して取り出す。このとき、苗押出体48は後退した状態にある。苗植付具26が下動して苗植付位置Bまで移動すると、苗押出体48が突出し、苗分離爪47が保持している苗の土部を下向きに押すことにより、苗を苗分離爪47から押し出して圃場に植付ける。その後、苗植付具26が下動時よりも後方の軌道を通って上動するとともに、苗押出体48が後退する。苗分離爪47先端の移動速度を苗取出位置A及び苗植付位置B付近で遅く、両位置A,B間は速くすることにより、苗の取出し及び植付けの精度は高く、かつ高速の植付けを可能にしている。
【0030】
このように、この苗植付装置14は、固定支持体20により外側から回転自在に支持されたロータリケース(回転体)21の左右両側に苗植付具26を設け、1個のロータリケースで同時に2条に苗を植付けるように構成されている。この構成を可能にするとともに、機能性向上、コスト低減のために、この苗植付装置には以下の特徴的な構造が採用されている。
【0031】
まず、回転体であるロータリケース21は左右の分割体21L,21Rに分割されていて、その間に駆動ギヤ30を挟み込んで固定している。これにより、ロータリケース21外から駆動ギヤ30への伝動を可能にするとともに、駆動ギヤ30を変形しにくくしている。駆動ギヤ30の外径は固定支持体20の内径よりは小さく、側面視で駆動ギヤ30が固定支持体20と重複しないようにしている。これにより、駆動ギヤ30ごとロータリケース21を固定支持体20から容易に着脱できる。
【0032】
また、駆動ギヤ30の外径は最終軸25,25が配置された円周よりも大きく、最終軸25,25は駆動ギヤ30を貫通して設けられている。このため、最終軸25,25の中間部が駆動ギヤ30に支持された状態となり、最終軸25,25の撓み防止に有効である。
【0033】
最終軸25,25へ伝動するギヤ列は、ロータリケース21の左右中央に位置する駆動ギヤ30の左右一方(図示例では右側)に回転ギヤ35があり、反対側に中間ギヤ36、第一カウンタギヤ37,37、第二カウンタギヤ38,38、及び最終ギヤ39,39がある配置としている。駆動ギヤ30は中心部が開口しており、この開口部30aに回転ギヤ35及び中間ギヤ36を取り付けた中間軸60が挿通されている。このように、ギヤ列の各ギヤを左右に振り分けて配置することにより、左右のバランスが良好になる。
【0034】
前記中間軸60は、第一、第二両カウンタギヤ37,38をそれぞれ取り付けた2本のカウンタ軸61,61から当距離の位置にあり、かつ側面視で2本のカウンタ軸61,61を結ぶ直線から外れた位置に配置している。また、2本のカウンタ軸の間隔Dは、第一カウンタギヤ37又は第二カウンタギヤ38の直径の2倍よりも小さくしている。これにより、ギヤ列が比較的簡略でコンパクトな構成とすることができる。ギヤ列は全体が最終軸25,25と重複しないように配置されている。
【0035】
苗植付装置14を停止させる場合、図示しない定位置クラッチにより一対の苗植付具26,26が同じ高さで停止するようになっているが、この時、2本のカウンタ軸61,61も同じ高さで停止し、その間に中間軸60が位置するようになっている。このため、苗植付装置停止時の前後重量バランスが良好で、停止位置が安定している。また、中間軸60が2本のカウンタ軸61,61を結ぶ直線の下側で停止した場合は、中間ギヤ36がロータリケース21内の潤滑油に浸った状態となるので、次回植付けを開始するときの動作がスムーズであるという効果もある。
【0036】
回転ギヤ35と噛合して該回転ギヤの軌道を決定する固定ギヤ40は内歯ギヤとし、これを固定支持体20に固定して取り付けている。その取付は、固定ギヤ40の外周4箇所に形成されている凸部40a,…を固定支持体20に形成された凹部に係合させ、固定支持体20に固定ギヤ40を回り止めした状態で固定している。この取付方法は、確実に回り止めできるうえ、ボルト等の固着具が不要で構造が簡単であるという利点がある。固定ギヤ40はロータリケース21と一体に構成してもよい。
【0037】
固定ギヤ40は、最終軸25,25の外側に、側面視でロータリケース21と重複しないように配置されている。また、最終ギヤ25,25は固定支持体20に側面視で重複しないようになっている。このため、ロータリケース21の着脱に際して、固定ギヤ40や最終ギヤ25,25が邪魔にならない。
【0038】
ロータリケースの左右分割体21L,21Rは、締付けボルト65により4箇所で互いに連結されている。図5に図示されているように、締付けボルト65の位置を最終軸25,25を挟む両側近傍に配置することにより、最終軸25,25を安定して支持できる。これら4本の締付けボルトのうち2本は左の分割体21L側から挿入され、残りの2本は右の分割体21R側から挿入される。左右の左右分割体21L,21Rは同じ部品で共用しているため、上記のように締付けボルト65の挿入方向を左右に分けている。
【0039】
駆動ギヤ30は、最終軸25と90度の位相をなす2箇所で固定されている。回転ギヤ35がある側の固定箇所は、両端に雄ねじ部66aと雌ねじ部66bとが形成された第一結合部材66の雄ねじ部66aを左の分割体21Lにナット67で固着するとともに、その第一結合部材66の雌ねじ部66bに駆動ギヤ30をボルト68で固定している。反対側の固定箇所は、両端に雄ねじ部69a,69bが形成された第二結合部材69の一方の雄ねじ部69aを左の分割体21Lに螺着し、その雄ねじ側に外嵌させた筒体70と第二結合部材の段部69cとの間で駆動ギヤ30を挟んで固定し、他方の雄ねじ部69bを右の分割体21Rにナット67で固着している。
【0040】
中間軸60は、両端に雄ねじ部60a,60bが形成されており、一方の雄ねじ部60aを左の分割体21Lの雌ねじ部71に螺着し、他方の雄ねじ部60bを右の分割体21Rの通孔72に挿通して、その突出部にナット67で螺着している。つまり、中間軸60は左右の分割体21L,21Rを結合する結合部材を兼ねている。このように、ロータリケース21の回転中心線24を挟んで一方側には両分割体21L,21Rと駆動ギヤ30とを共に結合する結合部材(第二結合部材)69を設け、反対側には左右両方の分割体21L,21Rの結合部材を兼ねる中間軸60を設けている。なお、中間軸60が取り付けられない左の分割体21Lの通孔72には栓73が取り付けられている。
【0041】
カウンタ軸61は、左端部で左の分割体21Lに螺着され、右端部に駆動ギヤ30が固定されている。このように左右一方の分割体に駆動ギヤ30及びカウンタギヤ37,38を取り付けると、ロータリケース21の左右分割が容易である。
【0042】
以上に挙げた特徴的な構造は、ロータリケース21とそれを支持する固定支持体20とについてであり、それよりも伝動下手側の苗植付具26は含まれていないので、本発明は苗植付装置に限定せず、苗載台から苗を取り出すだけの動作を行う苗取出装置にも適用できる。
【図面の簡単な説明】
【図1】乗用田植機の側面図である。
【図2】図1に示す乗用田植機の平面図である。
【図3】苗植付装置の外観側面図である。
【図4】苗植付装置の伝動機構を示す側面図その1である。
【図5】苗植付装置の伝動機構を示す側面図その2である。
【図6】S1−S1断面図である。
【図7】S2−S2断面図である。
【図8】S3−S3断面図である。
【図9】苗植付具の側面断面図である。
【図10】ギヤ列の状態と苗植付具の状態との関係を示す図その1である。
【図11】ギヤ列の状態と苗植付具の状態との関係を示す図その2である。
【図12】ギヤ列の状態と苗植付具の状態との関係を示す図その3である。
【図13】ギヤ列の状態と苗植付具の状態との関係を示す図その4である。
【図14】ギヤ列の状態と苗植付具の状態との関係を示す図その5である。
【図15】ギヤ列の状態と苗植付具の状態との関係を示す図その6である。
【図16】苗植付具先端の軌跡を示す図である。
【図17】機体の移動を加味した苗植付具先端の動軌跡を示す図である。
【符号の説明】
1 乗用田植機
5 走行車体
6 昇降リンク装置
7 苗植付部
14 苗植付装置
20 固定支持体
21 ロータリケース(回転体)
21L,21R 分割体
24 回転体の回転中心線
25 最終軸
26 苗植付具
30 駆動ギヤ
35 回転ギヤ
36 中間ギヤ
37 第一カウンタギヤ
38 第二カウンタギヤ
39 最終ギヤ
40 固定ギヤ
40a 凸部(回り止め)
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seedling planting device provided in a seedling transplanter such as a rice transplanter.
[0002]
[Prior art]
A seedling planting tool is provided in a rotary case that rotates about the planting drive shaft in the left-right direction as a rotation center, and the seedling planting tool moves a circular orbit to plant a seedling. As described in Patent Literature 1, generally, one rotary case (rotating case) 21 is provided with one seedling planting tool (transplanting tool) 30 for one row. This is because the planting transmission case 12 for transmitting to the planting drive shaft (rotary shaft) 22 is provided near the side of the rotary case, so that the seedling planting tool 30 cannot be provided on the left and right sides of the rotary case 21. It is.
[0003]
[Patent Document 1]
Japanese Patent Publication No. 7-112381
As a special example, as shown in Patent Literature 2, two rotary cases 21 and 21 provided in parallel on the left and right, or the rotary case 21 and the rotating body 65 are connected by a shaft 51 in the left and right direction. There is a configuration in which a seedling attaching tool 22 is attached to the apparatus. With this configuration, it is possible to operate two or more seedling-planting tools with one rotary case.
[0005]
[Patent Document 2]
Japanese Utility Model Application Laid-Open No. 62-91926 [0006]
[Problems to be solved by the invention]
In the case of the configuration represented by Patent Literature 1, the same number of rotary cases as the number of planting strips is required, so that there is a problem that the number of parts as a whole is large and the cost is high. On the other hand, the configuration of Patent Literature 2 can solve the above problem because two or more seedling attachments are provided per rotary case, but the shaft 51 for attaching the seedling attachments is liable to be twisted or bent. It is conceivable that the damage and the lowering of the planting accuracy caused by this will occur. Therefore, the present invention provides a seedling planting apparatus that can operate two seedling planting tools with one rotary case and that can be accurately operated without exerting an excessive force on the operation mechanism. Is an issue.
[0007]
[Means for Solving the Problems]
The present invention has the following configuration to solve the above problem. In other words, the seedling planting apparatus according to claim 1 is provided with a left-right final axis eccentric to the rotation center line rotatably provided on a rotating body that rotates around the left-right rotation center line, The seedling attachment is integrally attached to a protruding portion projecting left and right from the rotating body, and transmitted to a final gear that rotates integrally with the final shaft via a gear train provided on the rotating body. I have.
[0008]
The rotation of the rotating body about the rotation center line causes the seedling attachment to move in a circular orbit. At this time, the final shaft on which the seedling-planting implement is mounted is transmitted via the gear train, so that the posture of the seedling-planting implement changes appropriately and maintains an appropriate posture according to the moving position on the circular orbit. I do. By providing the gear train on the rotating body, it is possible to make the final shaft project from the rotating body to the left and right sides, and to provide seedling attachments at both left and right projected portions.
[0009]
The seedling planting device according to claim 2 is configured such that, in addition to the contents of claim 1, the gear train is arranged at a position that does not overlap with the final shaft in a side view.
[0010]
According to a third aspect of the present invention, in addition to the first or second aspect, the gear train includes a rotating gear that rotates while moving along a circular orbit about a rotation center line of the rotating body; An intermediate gear rotating integrally with the gear, a first counter gear meshing with the intermediate gear, and a second counter gear rotating integrally with the first counter gear and meshing with the final gear; A plurality of sets of a combination of a counter gear, a final gear, and a final shaft are provided, and a plurality of seedling attachments are provided on a circumference around a rotation center line of the rotating body. And the other set of the first counter gear or the second counter gear is arranged so as not to overlap with the rotation center axis of the second counter gear in side view, and the rotation centers of two different sets of the first counter gear and the second counter gear are different. First counter for axis spacing And smaller configuration than 2 times the diameter of Ya or second counter gear.
[0011]
According to a fourth aspect of the present invention, in addition to any one of the first to third aspects, the fixed gear that meshes with the rotating gear to determine the trajectory of the rotating gear is an internal gear, and the fixed gear is And a final shaft is provided inside the.
[0012]
According to a fifth aspect of the present invention, in addition to the features of the first to fourth aspects, the seedling planting apparatus further comprises: a fixed support for rotatably supporting the rotating body from the outside; and the rotating body rotating about a rotation center line. And the driving gear to be driven does not overlap in side view.
[0013]
In the seedling planting apparatus according to the sixth aspect, in addition to the contents of any one of the first to fifth aspects, the rotating body and the fixed gear are arranged so as not to overlap in a side view.
[0014]
In the seedling planting apparatus according to the seventh aspect, in addition to the contents of the fifth or sixth aspect, the final gear and the fixed support are arranged so as not to overlap in a side view.
[0015]
The seedling planting apparatus according to claim 8 is configured such that, in addition to the contents of any of claims 5 to 7, the fixed gear is prevented from rotating by the fixed support.
[0016]
【The invention's effect】
According to the configuration of claims 1 to 8, since the seedling attachments are provided on both the left and right sides of the rotating body, one rotating body can be shared by a plurality of rows (usually two rows), and the weight of the entire seedling planting apparatus is reduced. In addition, the cost can be reduced, and the gears of the gear train can be arranged without being shifted too much left and right, so that transmission to the seedling planting tool is stabilized and planting accuracy is improved.
[0017]
According to the configurations of claims 2 to 8, the configuration of claim 1 can be realized with a relatively simple gear train configuration. More specifically, according to the configuration of claim 3, rotation of two different sets of the first counter gear and the second counter gear in the combination of the first counter gear, the second counter gear, the last gear, and the last shaft provided in a plurality of sets. The rotating body can be miniaturized by narrowing the interval between the central axes, and the operation of the seedling attachment can be stabilized, the speed can be increased, and the cost can be reduced. Further, according to the configuration of the fourth aspect, the gear train can be provided on the rotating body without difficulty.
[0018]
In particular, in the case of claim 5, the rotating body can be attached to and detached from the fixed support together with the drive gear, and in the case of claim 6, the fixed gear does not interfere with the attaching and detaching of the rotating body. In the case of (1), the rotating body can be attached to and detached from the fixed support together with the final gear, thereby facilitating assembly of the planting apparatus. Furthermore, in the case of the eighth aspect, there is an effect that the rotation of the fixed gear can be surely prevented while having a simple structure.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a riding rice transplanter equipped with the seedling transplanting device of the present invention. The riding rice transplanter 1 is provided with a six-row plantation via an elevating link device 6 behind a traveling body 5 having a pair of left and right front wheels 3, 3 and rear wheels 4, 4 on which an engine 2 is mounted and driven to rotate. The seedling planting part 7 is connected. In the drawing, reference numeral 8 denotes a control seat, 9 denotes a steering handle for steering the front wheels 3 and 3, and 10 denotes a spare seedling mounting table on which spare seedlings are placed.
[0020]
The seedling planting section 7 is provided with a seedling mounting table 13 that is inclined so that a front portion thereof becomes higher in the upper side of a transmission case 12 to which power is input from the traveling vehicle body 5, and a planting transmission section 12 a of the transmission case 12. A set of seedling planting devices 14,... When the airframe advances while the floats 15,... Are in contact with the ground, the seedling table 13 reciprocates left and right, and the mat seedlings on the table are sequentially transferred to the seedling outlets 16,. , And the seedlings are scraped and planted in the field.
[0021]
The seedling planting apparatus 14 has a configuration shown in FIGS. An annular fixed support 20 is integrally provided at the rear end of the planting transmission section 12a, and a rotary case 21 as a rotating body composed of left and right divided bodies 21L and 21R is provided on the inner side thereof via a bearing 22 and a bush 23. And are rotatably fitted. The rotary case 21 is provided with two final shafts 25, 25 rotatably on the circumference around the rotation center line 24 at a phase of 180 degrees with respect to each other. Seedling attachments 26 are integrally attached to both left and right end portions protruding from the case 21.
[0022]
A drive gear 30 for driving the rotary case 21 is provided between the left and right divided bodies 21L and 21R. The drive gear 30 meshes with a transmission gear 33 attached to a shaft 32 that is transmitted via a chain 31 in the planting transmission section 12a, and rotates at a constant speed in a fixed direction.
[0023]
In the rotary case 21, a gear train for transmitting power to the final shafts 25, 25 is provided. The gear train includes a rotating gear 35 that rotates while moving along a circular orbit about the rotation center line 24 of the rotary case 21, an intermediate gear 36 that rotates integrally with the rotating gear, and a first gear that meshes with the intermediate gear. It comprises counter gears 37, 37, second counter gears 38, 38 integrally rotating with the first counter gear, and final gears 39, 39 attached to the final shafts 25, 25 and meshing with the second counter gear. . Two combinations of the first counter gear 37, the second counter gear 38, and the final gear 39 are provided, and the rotation of the intermediate gear 36 branches into two systems and is transmitted to the two final shafts 25, respectively. The rotary gear 35 meshes with a fixed gear 40 of internal teeth fixed to the fixed support 20, and performs the above operation in conjunction with the rotation of the rotary case 21.
[0024]
When the drive gear 30 rotates, the rotary case 21 integral therewith also rotates, and the pair of seedling-planting tools 26 move in a circular orbit. At this time, the operation of the rotating gear 35 that is linked to the rotation of the rotary case 21 is transmitted to the final shafts 25, 25 via the gear train, and the posture of the seedling attachments 26, 26 changes. Since the second counter gear 38 and the final gear 39 are non-circular gears, the posture change of the seedling planting tool 26 is slowed down. As a result, the posture of the seedling attachment 26 changes as shown in FIGS. FIG. 16 shows this in a single diagram. The seedling attaching tool 26 operates so that the tip of the seedling separation claw 47 described later draws a locus P while sequentially changing the posture. The moving speed of the seedling separating claw 47 is low near the seedling extracting position A and the seedling planting position B, and is high between the two positions A and B. The tip movement locus P ′ of the seedling separation claw 47 taking into account the movement of the machine is as shown in FIG.
[0025]
Further, inside the rotary case 21, a brake cam 42 attached so as to rotate integrally with the final shaft 25, a brake arm 43 abutting on the outer peripheral surface of the brake cam, and a spring for pressing the brake arm against the brake cam 42. 44 are provided. This phase shift prevention mechanism brakes the rotation of the final gear 39 when the seedling placement tool 26 is at the seedling removal position A and the seedling placement position B, absorbs backlash between the gears, and separates the seedling separation described later. And it acts so that the operation of planting seedlings is performed accurately. The spring 44 is shared by the two sets of phase shift prevention mechanisms.
[0026]
The seedling attachment 26 is attached to the final shaft 25 by a cotter pin 46 so as to be integrally operated. The seedling attaching tool 26 is provided with a forked fork-shaped seedling separating claw 47 having a sharp tip, and a seedling extruded body 48 that protrudes and retracts below the seedling separating claw. .
[0027]
The operation mechanism of the seedling extruded body 48 is as follows. That is, the cam arm 52 rotatably supported by the arm shaft 51 is in sliding contact with the outer peripheral surface of the pushing cam 50 rotatably fitted to the final shaft 25. An extruding control arm 53 that rotates integrally with the cam arm 52 is pivotally supported on the arm shaft 51, and the distal end of the extruding control arm and the end of the extruding rod 54 that supports the seedling extruded body 48 are connected by a joint. They are connected via a member 55. The joint member 55 is urged by a pushing spring 56 to the side where the pushing rod 54 projects.
[0028]
When the final shaft 25 rotates, the pushing cam 50 rotates relatively to the shaft, and the pushing regulating arm 53 swings by the action of the cam mechanism including the pushing cam 50 and the cam arm 52. When the push-out regulating arm 53 is located at a position where the push-out spring 56 is compressed, the seedling push-out body 48 is in a retracted state. When the push-out regulating arm 53 rotates from that position and the compression of the push-out spring 56 is relaxed, the push-out rod 54 is pushed out by the elastic force of the push-out spring 56, and the seedling extruded body 48 projects.
[0029]
At the time of the operation with the riding rice transplanter 1, as described above, the pair of seedling attaching tools 26, 26 move on the same orbit while maintaining a half cycle interval while drawing the tip trajectory P. At the seedling removal position A, the seedling separating claw 47 takes out the seedling at the seedling removal outlet 16 by dividing it into one plant. At this time, the seedling extruded body 48 is in a retracted state. When the seedling placement tool 26 moves downward and moves to the seedling placement position B, the seedling extruded body 48 protrudes and pushes the soil portion of the seedling held by the seedling separation claw 47 downward to separate the seedling. It is extruded from the nail 47 and planted in the field. Thereafter, the seedling attaching tool 26 moves upward through the orbit behind the downward movement, and the seedling extruded body 48 retreats. The moving speed of the tip of the seedling separation claw 47 is slow near the seedling picking position A and the seedling planting position B, and is high between the two positions A and B, so that the accuracy of picking and planting the seedlings is high and high-speed planting is possible. Making it possible.
[0030]
In this way, the seedling planting apparatus 14 is provided with the seedling planting tools 26 on both the left and right sides of the rotary case (rotating body) 21 rotatably supported from the outside by the fixed support body 20. At the same time, the seedlings are planted in two rows. The following characteristic structure is adopted in this seedling-planting apparatus in order to make this configuration possible, and to improve functionality and reduce costs.
[0031]
First, the rotary case 21, which is a rotating body, is divided into left and right divided bodies 21L and 21R, and the drive gear 30 is sandwiched and fixed therebetween. Thus, transmission from outside the rotary case 21 to the drive gear 30 is enabled, and the drive gear 30 is hardly deformed. The outer diameter of the drive gear 30 is smaller than the inner diameter of the fixed support 20 so that the drive gear 30 does not overlap with the fixed support 20 in a side view. Thus, the rotary case 21 together with the drive gear 30 can be easily attached to and detached from the fixed support 20.
[0032]
The outer diameter of the drive gear 30 is larger than the circumference on which the final shafts 25, 25 are arranged, and the final shafts 25, 25 are provided through the drive gear 30. Therefore, the intermediate portions of the final shafts 25, 25 are supported by the drive gear 30, which is effective for preventing the final shafts 25, 25 from bending.
[0033]
The gear train transmitted to the final shafts 25, 25 has a rotary gear 35 on one of the left and right sides (right side in the illustrated example) of the drive gear 30 located at the left and right center of the rotary case 21, an intermediate gear 36 on the opposite side, and a first counter. The gears 37, 37, the second counter gears 38, 38, and the final gears 39, 39 are arranged. The drive gear 30 has an opening at the center, and the intermediate shaft 60 to which the rotating gear 35 and the intermediate gear 36 are attached is inserted through the opening 30a. In this way, by arranging the gears of the gear train separately on the left and right, the balance on the left and right is improved.
[0034]
The intermediate shaft 60 is located at the same distance from the two counter shafts 61, 61 to which the first and second counter gears 37, 38 are attached, respectively. It is located at a position off the connecting straight line. Further, the distance D between the two counter shafts is smaller than twice the diameter of the first counter gear 37 or the second counter gear 38. Thus, the gear train can be made relatively simple and compact. The gear train is arranged so that the whole does not overlap with the final shafts 25, 25.
[0035]
When the seedling planting device 14 is stopped, a pair of seedling planting tools 26, 26 are stopped at the same height by a fixed position clutch (not shown). At this time, two counter shafts 61, 61 are used. Also stop at the same height, during which the intermediate shaft 60 is positioned. Therefore, the weight balance before and after the seedling planting device is stopped is good, and the stopping position is stable. When the intermediate shaft 60 stops below the straight line connecting the two counter shafts 61, 61, the intermediate gear 36 is immersed in the lubricating oil in the rotary case 21, so that the next planting is started. There is also an effect that the operation at the time is smooth.
[0036]
The fixed gear 40 that meshes with the rotating gear 35 to determine the trajectory of the rotating gear is an internal gear, which is fixedly attached to the fixed support 20. The attachment is performed in a state where the protrusions 40a,... Formed at four places on the outer periphery of the fixed gear 40 are engaged with the recesses formed in the fixed support 20, and the fixed gear 40 is prevented from rotating around the fixed support 20. It is fixed. This mounting method has the advantages that the rotation can be reliably prevented, and that a fixing tool such as a bolt is not required and the structure is simple. The fixed gear 40 may be formed integrally with the rotary case 21.
[0037]
The fixed gear 40 is arranged outside the final shafts 25, 25 so as not to overlap with the rotary case 21 in a side view. Further, the final gears 25, 25 do not overlap the fixed support 20 in a side view. Therefore, when the rotary case 21 is attached or detached, the fixed gear 40 and the final gears 25 and 25 do not interfere.
[0038]
The left and right divided bodies 21 </ b> L and 21 </ b> R of the rotary case are connected to each other at four places by fastening bolts 65. As shown in FIG. 5, the final shafts 25, 25 can be stably supported by arranging the positions of the tightening bolts 65 near both sides of the final shafts 25, 25. Two of these four tightening bolts are inserted from the left divided body 21L side, and the other two are inserted from the right divided body 21R side. Since the left and right divided bodies 21L and 21R are shared by the same parts, the insertion direction of the tightening bolt 65 is divided into left and right as described above.
[0039]
The drive gear 30 is fixed at two positions that are 90 degrees in phase with the final shaft 25. The fixed portion on the side where the rotary gear 35 is located is such that the male screw portion 66a of the first coupling member 66 having the male screw portion 66a and the female screw portion 66b formed at both ends is fixed to the left divided body 21L with the nut 67, and The drive gear 30 is fixed to the female screw portion 66b of the one coupling member 66 with a bolt 68. The opposite fixed portion is a cylindrical body in which one male screw portion 69a of the second coupling member 69 having male screw portions 69a and 69b formed at both ends is screwed to the left divided body 21L, and externally fitted to the male screw side. The drive gear 30 is sandwiched and fixed between 70 and the step portion 69c of the second coupling member, and the other male screw portion 69b is fixed to the right divided body 21R with a nut 67.
[0040]
The intermediate shaft 60 has male screw portions 60a and 60b formed at both ends. One male screw portion 60a is screwed to the female screw portion 71 of the left divided body 21L, and the other male screw portion 60b is formed of the right divided body 21R. It is inserted into the through hole 72 and is screwed to the protruding portion with a nut 67. That is, the intermediate shaft 60 also serves as a connecting member for connecting the left and right divided bodies 21L and 21R. As described above, the coupling member (second coupling member) 69 that couples the divided bodies 21L and 21R and the drive gear 30 together is provided on one side of the rotary center line 24 of the rotary case 21 and on the opposite side. An intermediate shaft 60 is provided which also serves as a coupling member for the left and right divided bodies 21L and 21R. A plug 73 is attached to the through hole 72 of the left divided body 21L to which the intermediate shaft 60 is not attached.
[0041]
The counter shaft 61 is screwed to the left divided body 21L at the left end, and the drive gear 30 is fixed to the right end. When the drive gear 30 and the counter gears 37 and 38 are attached to one of the left and right divided bodies, the rotary case 21 can be easily divided into left and right.
[0042]
The characteristic structure described above is about the rotary case 21 and the fixed support 20 that supports the rotary case 21. Since the seedling planting tool 26 on the lower side of the transmission is not included in the rotary case 21, the present invention relates to a seedling. The present invention is not limited to the planting device, and can be applied to a seedling removal device that only performs an operation of removing a seedling from a seedling mounting table.
[Brief description of the drawings]
FIG. 1 is a side view of a riding rice transplanter.
FIG. 2 is a plan view of the riding rice transplanter shown in FIG.
FIG. 3 is an external side view of the seedling planting apparatus.
FIG. 4 is a first side view showing a transmission mechanism of the seedling planting apparatus.
FIG. 5 is a second side view showing the transmission mechanism of the planting apparatus.
FIG. 6 is a sectional view taken along line S1-S1.
FIG. 7 is a sectional view taken along line S2-S2.
FIG. 8 is a sectional view taken along line S3-S3.
FIG. 9 is a side sectional view of the seedling attachment.
FIG. 10 is a first diagram illustrating a relationship between a state of a gear train and a state of a seedling plant.
FIG. 11 is a second diagram illustrating the relationship between the state of the gear train and the state of the seedling attachment.
FIG. 12 is a third diagram showing the relationship between the state of the gear train and the state of the seedling-planting implement.
FIG. 13 is a fourth diagram illustrating the relationship between the state of the gear train and the state of the seedling plant.
FIG. 14 is a fifth diagram illustrating the relationship between the state of the gear train and the state of the seedling attachment.
FIG. 15 is a view No. 6 showing the relationship between the state of the gear train and the state of the seedling plant.
FIG. 16 is a diagram showing a trajectory of a tip of a seedling attachment.
FIG. 17 is a diagram showing a movement trajectory of the tip of the seedling attachment in consideration of the movement of the machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Riding rice transplanter 5 Running vehicle body 6 Elevating link device 7 Seedling planting part 14 Seedling planting device 20 Fixed support 21 Rotary case (rotary body)
21L, 21R Split body 24 Center of rotation 25 of rotating body Final shaft 26 Seedling attachment 30 Drive gear 35 Rotating gear 36 Intermediate gear 37 First counter gear 38 Second counter gear 39 Final gear 40 Fixed gear 40a Stop)

Claims (8)

左右方向の回転中心線回りに回転する回転体に前記回転中心軸に対し偏心した左右方向の最終軸を回転自在に設け、その最終軸における回転体から左右に突出する突出部に苗植付具を一体に取り付けるとともに、前記最終軸と一体回転する最終ギヤへ前記回転体に設けたギヤ列を介して伝動するようにしたことを特徴とする苗植付装置。A left-right final axis eccentric to the rotation center axis is rotatably provided on a rotating body that rotates about the right-left rotation center line, and a seedling attachment is provided on a protruding portion of the final shaft that projects left and right from the rotating body. And a transmission unit for transmitting the gears to a final gear that rotates integrally with the final shaft via a gear train provided on the rotating body. ギヤ列を側面視で最終軸と重複しない位置に配置した請求項1に記載の苗植付装置。The seedling planting apparatus according to claim 1, wherein the gear train is arranged at a position not overlapping with the final shaft in a side view. ギヤ列は、回転体の回転中心線を中心とする円軌道を移動しながら回転する回転ギヤと、該回転ギヤと一体回転する中間ギヤと、該中間ギヤに噛合する第一カウンタギヤと、該第一カウンタギヤと一体回転し最終ギヤに噛合する第二カウンタギヤとからなり、第一カウンタギヤ、第二カウンタギヤ、最終ギヤ及び最終軸の組み合わせを複数組設けて、回転体の回転中心線を中心とする円周上に複数の苗植付具を設けた構成とし、或る組の第一カウンタギヤ及び第二カウンタギヤの回転中心軸に他の組の第一カウンタギヤ又は第二カウンタギヤが側面視で重複しない配置とするとともに、異なる2組の第一カウンタギヤ及び第二カウンタギヤの回転中心軸の相互間隔を第一カウンタギヤ又は第二カウンタギヤの直径の2倍よりも小さくした請求項1又は2に記載の苗植付装置。The gear train includes a rotating gear that rotates while moving along a circular orbit about the rotation center line of the rotating body, an intermediate gear that rotates integrally with the rotating gear, a first counter gear that meshes with the intermediate gear, A first counter gear and a second counter gear that rotates integrally with and meshes with the final gear; a plurality of combinations of the first counter gear, the second counter gear, the final gear, and the final shaft are provided, and the rotation center line of the rotating body is provided. A plurality of seedling attachments are provided on the circumference around the center, and the other set of the first counter gear or the second counter is mounted on the rotation center axis of one set of the first counter gear and the second counter gear. The gears are arranged so as not to overlap in side view, and the mutual interval between the rotation center axes of two different sets of the first counter gear and the second counter gear is smaller than twice the diameter of the first counter gear or the second counter gear. Claims made Seedling planting device according to 1 or 2. 回転ギヤと噛合して該回転ギヤの軌道を決定する固定ギヤを内歯ギヤとし、その固定ギヤの内側に最終軸を設けた請求項1乃至3のいずれかに記載の苗植付装置。The seedling planting apparatus according to any one of claims 1 to 3, wherein the fixed gear that meshes with the rotating gear to determine the trajectory of the rotating gear is an internal gear, and a final shaft is provided inside the fixed gear. 回転体を外側から回転自在に支持する固定支持体と、回転体を回転中心線回りに回転させるように駆動する駆動ギヤとが側面視で重複しない配置とした請求項1乃至4のいずれかに記載の苗植付装置。5. A fixed support for rotatably supporting a rotating body from the outside and a drive gear for driving the rotating body to rotate about a rotation center line are arranged so as not to overlap in a side view. A seedling plant according to the above. 回転体と固定ギヤとが側面視で重複しない配置とした請求項1乃至5のいずれかに記載の苗植付装置。The seedling planting apparatus according to any one of claims 1 to 5, wherein the rotating body and the fixed gear are arranged so as not to overlap in a side view. 最終ギヤと固定支持体とが側面視で重複しない配置とした請求項5又は6に記載の苗植付装置。The seedling planting apparatus according to claim 5 or 6, wherein the final gear and the fixed support are arranged so as not to overlap in a side view. 固定ギヤが固定支持体に回り止めされている請求項5乃至7のいずれかに記載の苗植付装置。The seedling planting apparatus according to any one of claims 5 to 7, wherein the fixed gear is prevented from rotating by the fixed support.
JP2003054668A 2003-01-31 2003-02-28 Seedling planting equipment Expired - Fee Related JP4496706B2 (en)

Priority Applications (3)

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JP2003054668A JP4496706B2 (en) 2003-02-28 2003-02-28 Seedling planting equipment
CNB200410003752XA CN1295952C (en) 2003-01-31 2004-01-30 Transplanting appts.
KR1020040005960A KR100694651B1 (en) 2003-01-31 2004-01-30 Transplanting device

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62155011A (en) * 1985-12-27 1987-07-10 ヤンマー農機株式会社 Multirow rice planter
JPS6447307A (en) * 1987-08-13 1989-02-21 Yanmar Agricult Equip Transmission case in rotary planter
JPH0530823A (en) * 1991-08-01 1993-02-09 Seibutsukei Tokutei Sangyo Gijutsu Kenkyu Suishin Kiko Seedling planting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62155011A (en) * 1985-12-27 1987-07-10 ヤンマー農機株式会社 Multirow rice planter
JPS6447307A (en) * 1987-08-13 1989-02-21 Yanmar Agricult Equip Transmission case in rotary planter
JPH0530823A (en) * 1991-08-01 1993-02-09 Seibutsukei Tokutei Sangyo Gijutsu Kenkyu Suishin Kiko Seedling planting device

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