JP3377329B2 - Seedling planting mechanism - Google Patents

Seedling planting mechanism

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Publication number
JP3377329B2
JP3377329B2 JP07852595A JP7852595A JP3377329B2 JP 3377329 B2 JP3377329 B2 JP 3377329B2 JP 07852595 A JP07852595 A JP 07852595A JP 7852595 A JP7852595 A JP 7852595A JP 3377329 B2 JP3377329 B2 JP 3377329B2
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JP
Japan
Prior art keywords
seedling
planting
case
rotation
claw
Prior art date
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Expired - Fee Related
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JP07852595A
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Japanese (ja)
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JPH08275637A (en
Inventor
守 久保
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Kubota Corp
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Kubota Corp
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Priority to JP07852595A priority Critical patent/JP3377329B2/en
Publication of JPH08275637A publication Critical patent/JPH08275637A/en
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Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明は、植付伝動ケースに対し
て横軸芯周りで回転自在に支持された回転ケースにおけ
る、前記横軸芯から互いに反対方向に偏芯した2箇所の
夫々に、前記横軸芯と平行な軸芯周りで相対回動自在
に、苗植付爪が取付けられた一対の植付爪支持体を軸支
し、前記各植付爪支持体を一体的に回動する状態で軸支
する各支持軸と、前記植付伝動ケースとの間に、前記回
転ケースの回転に伴って、前記各苗植付爪の先端部が、
側面視でほぼ重複する略楕円軌跡を描くように、前記各
支持軸を前記回転ケースに対してその回転方向と逆方向
に相対回動駆動させる相対回動手段を介装し、前記各植
付爪支持体と、前記各支持軸とを、夫々、フランジ連結
させて固定してある苗植付機構に関し、詳しくは、植付
爪支持体と支持軸との連結固定構造の改良に関するもの
である。 【0002】 【従来の技術】従来、上記のように構成された苗植付機
構として特公平6‐20371号公報に示されるものが
存在し、この従来例では、支持軸(公報中、植付ケース
支持部材37)に一体形成されたフランジ連結部(同、
フランジ37a)に対して、植付爪支持体(同、植付爪
ケース38)に一体形成したフランジ連結部(同、基部
38a)をボルトで連結固定する構成となっている。 【0003】 【発明が解決しようとする課題】従来例の構造では植付
爪支持体と支持軸とを連結する際には、図面から判断し
て夫々のフランジ連結部を重ねた状態でボルトを挿通
し、ボックスレンチ等で締め付ける操作を行うものとな
る。又、点検保守の目的でこの部位を分離する場合に
も、ボックスレンチ等を用いてボルトを緩め操作し、人
為的にボルトを抜取る操作を行うものとなる。しかし、
この従来例に限らず、従来からの苗植付機構ではフラン
ジが形成された部位が他方の植付爪支持体の苗植付爪の
先端の軌跡と重複する位置にあるので、回転ケース(公
報中、駆動ケース28)の回転が停止した姿勢によって
は、側面視(支持軸の軸芯と沿う方向視)で苗植付爪
(同、植付爪45)、あるいは、植付爪支持体の先端部
がフランジ連結部と重なり合う位置関係となり、苗植付
爪がボックスレンチの挿入を妨げる等、フランジ連結部
の着脱が阻害されることもあり改善の余地がある。 【0004】尚、この種の苗植付機構では回転ケースが
1回転すると、植付爪支持体が逆方向に1回転する作動
を行うものであり、この作動形態を考慮すると、例えば
従来例の第2図の構成では、一方の植付爪支持体が回転
ケースに対して1回転する際の苗植付爪の先端の円形軌
跡が他方の植付爪支持体の回転軸芯(カム軸32の軸
芯)と大きく重複することから(コンパスを用いて作図
すると理解できる)、前述したように回転ケースに対す
る植付爪支持体の姿勢によってはフランジ連結部と苗植
付爪とが重複することを説明できる。 【0005】本発明の目的は、回転ケースに対する植付
爪支持体の姿勢に拘わらず植付爪支持体と支持軸との連
結、及び、分離を容易に行える苗植付機構を合理的に構
成する点にある。 【0006】 【課題を解決するための手段】本発明の特徴は冒頭に記
したように、植付伝動ケースに支持された回転ケースの
2箇所の夫々に苗植付爪を有する植付爪支持体を軸支
し、各植付爪支持体を一体的に回動状態で軸支する各支
持軸と植付伝動ケースとの間に、回転ケースの回転に伴
って各苗植付爪の先端部が側面視でほぼ重複する略楕円
軌跡を描くよう各支持軸を回転ケースに対して逆方向に
相対回動駆動させる相対回動手段を介装し、各植付爪支
持体と各支持軸とを、夫々、フランジ連結させて固定し
てある苗植付機構において、前記各支持軸の軸芯延長上
に位置するカム軸に苗押し出し具を押し出し作動させる
カムが形成され、一対のカム軸はそれらにわたって架設
された連結杆に固定連結して回転ケースの回転に伴って
一体的に回動するように構成すると共に、前記各植付爪
支持体と、前記各支持軸とを、夫々連結させるフランジ
連結部の夫々を、側面視において、反対側に位置する苗
植付爪の先端軌跡の外方側に位置させる状態で配置して
ある点にあり、その作用、及び、効果は次の通りであ
る。 【0007】 【作用】上記特徴によると、側面視において夫々のフラ
ンジ連結部が苗植付爪の先端軌跡の外方側に位置するの
で、一方の植付爪支持体と支持軸とをフランジ連結部位
で連結する場合、分離する場合には回転ケースの回転姿
勢に拘わらず、苗植付爪、あるいは、植付爪支持体の先
端部位がフランジ連結部と重複することが無く、このフ
ランジ連結部を連結するボルト等の操作を行う際にもボ
ックスレンチ等の挿入を妨げられずに行えるものとな
る。 【0008】 【発明の効果】従って、回転ケースに対する植付爪支持
体の姿勢に拘わらず植付爪支持体と支持軸との連結、及
び、分離を容易に行える苗植付機構が合理的に構成され
たのである。 【0009】 【実施例】以下、本発明の実施例を図面に基づいて説明
する。図1に走行機体に備えられた苗植付装置を示して
いる。この苗植付装置は、角パイプ状のメインフレーム
1を機体横幅方向に沿って配置し、このメインフレーム
1の横幅方向ほぼ中央部に機体側からの動力が伝えられ
るフィードケース2を取付けると共に、横幅方向に適宜
間隔をあけて複数の植付伝動ケース3を後方に向けて延
出する状態で取付けてあり、これらによって、フレーム
体が構成されている。そして、機体横幅方向に一定スト
ロークで往復移動する苗のせ台4をフレーム体に支持さ
せ、この苗のせ台4上に載置されたマット苗の一部を切
り出して、圃場に植付ける複数の苗植付機構5を、前記
各植付伝動ケース3の後部の左右両側に夫々配設してあ
る。 【0010】次に、前記各苗植付機構5の構成について
説明する。図2に示すように、フィードケース2から伝
動チェーン(図示せず)を介して回転動力が伝えられる
駆動軸8が、植付伝動ケース3の後部において、横方向
外方に突出する状態で回動自在にベアリング9にて支持
され、この駆動軸8の外方突出部に、一体的に回動する
状態で回転ケース10を取付けてある。つまり、駆動軸
8の突出側端部の外周部の一部に切欠kを形成してあ
り、回転ケース10の軸承部10aに、駆動軸8軸芯と
直交する方向にテーパピン11が前記切欠kに圧接する
状態で打ち込み圧入され、駆動軸8と回転ケース10と
が一体回転すると共に、回転ケース10の外方への抜け
外れを阻止するようにしている。 【0011】この回転ケース10には、駆動軸8の軸芯
X1に対して180度の回転位相差を有する、2つの平
行な軸芯X2,X3周りで相対回動自在に、夫々、苗植
付爪12が取付けられた一対の植付爪支持体としての植
付爪支持ケース13を各別に支持軸14によって軸支し
てある。 【0012】図2乃至図4に示すように、前記各植付爪
支持ケース13には、苗植付爪12が取付け支持される
と共に、苗植付け作動に伴って苗植付爪12により保持
されている苗を圃場に押し出す苗押し出し具15が設け
られている。植付爪支持ケース13内に、支持軸14の
軸芯の延長上に位置するカム軸16が相対回動自在にベ
アリング支持され、このカム軸16には、苗押し出し具
15を押し出し作動させるカム17が形成されている。
カム軸16は、他方側のカム軸16と共に、それらにわ
たって架設された連結杆18にボルト連結され、回転ケ
ース10の回転に伴って一体的に回動するようになって
いる。 【0013】苗押し出し具15にはリンク19を介して
天秤アーム20が枢支され、この天秤アーム20の反対
側端部には前記カム17に作用するカムフォロア21を
備えてあり、しかも、カムフォロア21がカム17に押
圧する方向に天秤アーム20を揺動付勢する戻しバネ2
2を備えてある。後述するように、植付爪支持ケース1
3は回転ケース10に対して相対的に回動することにな
るので、植付爪支持ケース13とカム軸16とは所定回
動範囲で相対回動することになる。従って、この相対回
動に伴って、カム軸16に設けられたカム17の作用に
よって、戻しバネ22の戻し付勢力に抗して苗押し出し
具15が植付け作動に伴って相対的に苗押し出し方向に
移動するように構成されている。 【0014】回転ケース10の回転に伴って、苗植付爪
12の先端部が側面視で略楕円軌跡を描くように、植付
爪支持ケース13と回転ケース10とを相対回動駆動さ
せるギヤ式の相対回動手段Sが備えられている。 【0015】詳述すると、回転ケース10の内部には、
植付伝動ケース3における駆動軸8の軸承用ボス部3a
に対して噛み合い部Aを介して駆動軸8の軸芯方向に噛
み合うことによって回転が阻止された状態で、円形の太
陽ギヤ23が駆動軸8に遊転外嵌されており、又、植付
爪支持ケース13を支持する支持軸14が、回転ケース
10の内部において左右両側のベアリング24,25に
より両持ち支持状態で回転自在に支持されている。そし
て、この支持軸14が、植付伝動ケース3と反対側外方
に向けて回転ケース10から外方突出させてあり、この
支持軸14の外方突出部に一体的に形成されたフランジ
連結部26に、植付爪支持ケース13に形成されたフラ
ンジ連結部27を一対のボルト28,28で締付け連結
すると共に、支持軸14のフランジ連結部26よりも外
端側の軸部を植付爪支持ケース13の挿通孔29に嵌合
装着させて植付爪支持ケース13を位置決め状態で支持
するように構成してある。 【0016】回転ケース10に備えた夫々の植付爪支持
ケース13,13は、後述するように回転ケース10が
軸芯X1周りで1回転する際に、軸芯X2,X3周りで
逆方向に1回転するものであり、この回転の際には、側
面視において一方の植付爪支持ケース13の苗植付爪1
2の先端部が回転ケース10に対して回転する際の軌跡
F(円形の軌跡になる、図4を参照)の外方側に、他方
の植付爪支持ケース13の両フランジ連結部26,27
が位置するよう両フランジ連結部26,27を成形し、
又、相対位置関係を設定して、ボルト28をボックスレ
ンチ等で回動操作する際、人為的にボルト28を操作す
る際に他方の苗植付爪12、あるいは、植付爪支持ケー
ス13が妨げにならないように構成されている。 【0017】図5に示すように、このフランジ連結部2
6にはアーム部26Aが一体形成され、このアーム部2
6Aと植付爪支持ケース13の突出部13Aとの間に
は、突出部13Aに螺合するネジ部材46、及び、ロッ
クナット47を有した調節機構を備えて、支持軸14の
軸芯(軸芯X2若しくは軸芯X3)周りでのフランジ連
結部26と植付爪支持ケース13との相対回動姿勢を調
節できるよう構成されている。 【0018】回転ケース10内において、支持軸14に
一体回転自在に円形の遊星ギヤ30がスプライン外嵌さ
れ、この遊星ギヤ30と、前記太陽ギヤ23との間の中
間伝動部に、夫々の回転軸芯が変位する円形の第1中間
ギヤ31と円形の第2中間ギヤ32とを不等速状態で回
動させる偏芯クランク式の回動伝達機構Dを備えてあ
る。第1中間ギヤ31は、太陽ギヤ23に噛み合うと共
に、その太陽ギヤ23と同一歯数になるように形成さ
れ、第2中間ギヤ32は前記遊星ギヤ30に噛み合うと
共に、その遊星ギヤ30と同一歯数になるように形成さ
れ、第1中間ギヤ31の回転軸芯X4が第2中間ギヤ3
2の回転軸芯X5よりも太陽ギヤ23から離間する側に
偏芯した状態で、夫々の回転支軸33,34が回転ケー
ス10にベアリング支持されている。各回転支軸33,
34は、夫々の中間ギヤ31,32に対して互いに逆向
きに横一側方に突出する状態で設けられ、各中間ギヤ3
1,32は回転ケース10に対して片持ち状に軸支され
ている。 【0019】そして、前記第2中間ギヤ32における回
転支軸34と反対側、つまり、第1中間ギヤ31に対向
する側であってその回転軸芯から偏芯した箇所に、一体
的に伝動部としてのクランクローラ35が設けられてい
る。図6に示すように、このクランクローラ35は、耐
磨耗性の材質からなり、第2中間ギヤ32の側面に一体
的に突設させたピン36に回動自在に外嵌させてある。
又、第1中間ギヤ31における回転支軸33と反対側、
つまり、第2中間ギヤ32に対向する側には、前記クラ
ンクローラ35が係合すると共に、クランクローラ35
が径方向に位置ずれすることを許容しながら回転力を伝
える伝動部としての溝部38を形成する一対の突条3
9,39を形成してある。 【0020】前記各中間ギヤ31,32は、回転ケース
10内に組付けられた状態において、互いに対向する端
面同士、即ち、前記突条39の対向側端面と、第2中間
ギヤ32の対向側の側面とを接当させる状態で配置して
ある。このようにして、回転ケース10に対して片持ち
状に軸支される構成に起因して発生する苗植付け作動に
伴う駆動反力によって、ギヤが傾斜することを互いに接
当支持することで未然に防止できる構成としている。 【0021】このように構成することで、回転ケース1
0の回転に伴って第1中間ギヤ31が太陽ギヤ23に対
する噛み合い状態を維持しながら、駆動軸8の軸芯周り
で1回転公転すると、植付爪支持ケース13が回転ケー
ス10に対して逆方向に1回転自転することになる。こ
こで、この第1中間ギヤ31に対して遊星ギヤ30が噛
み合う状態であれば、遊星ギヤ30が第1中間ギヤ31
に対して逆向きに1回転自転するから、相対的に自転し
ない状態と同じになる。 【0022】しかし、上述したような相対回動手段Sが
設けられることで、第1中間ギヤ31に設けられた突条
39によって回動操作されるクランクローラ35が設け
られる第2中間ギヤ32は、回転軸芯が偏芯しているこ
とによって、回転ケース10の1回転に対して1回の変
動周期で相対回動周速度が変化することになる。 【0023】その結果、円形ギヤのみを用いたものであ
り乍ら、回転ケース10の回転に応じて遊星ギヤ30の
自転角度が図7に示すように周期的に変動することにな
り、苗植付爪12の先端部の軌跡が図1に示すように、
側面視で略楕円軌跡を描きながら、苗植付爪12が相対
的に上下に首振り運動が実行され、適切な苗植付け作動
が実行される。しかも、植付爪支持ケース13を支持す
る支持軸14は、回転ケース10内において左右両側で
両持ち状態でベアリング支持され、強固に支持すること
ができる。 【0024】前記苗植付爪12が、苗のせ台4上の苗に
突入する際、回転ケース10の回転方向と逆方向に向け
て強い衝撃反力を受けるが、この衝撃反力を受ける方向
は、遊星ギヤ30の駆動回動方向と同じであることか
ら、ギヤ噛み合い部のバックラッシュに相当するガタツ
キ分だけ、苗植付爪12の移動方向(回転ケース10の
回転方向)と反対方向に移動するおそれがあり、その結
果、円滑な苗取り出しが行えないおそれがある。そこ
で、このようなガタツキを少なくさせるためのガタ取り
機構が設けられている。 【0025】つまり、図8、図9に示すように、前記第
2中間ギヤ32の横側部位に、ギヤ歯先よりも径方向外
方に突出する2個の操作部40aが形成された操作部材
40を一体回動自在に設けると共に、前記支持軸14に
おける前記操作部材40に対応する箇所に、先端部がギ
ヤピッチ円とほぼ一致する2個の接当部41aが形成さ
れた先行回動部材41を、支持軸14に遊転自在に外嵌
する状態で設けてある。前記先行回動部材41は、遊星
ギヤ30の側面に立設したピン42により接当されて回
動するように構成され、ギヤ噛み合いによる回動に伴っ
て接当部41aが少しだけ操作部40aよりも先行して
回動すると共に、この接当部41aに対してギヤ歯先よ
りも突出した操作部40aが接当操作して、ギヤ噛み合
いによる回動よりも少しだけ先行させた状態で、先行回
動部材41を先行させて回動させるように構成してあ
る。 【0026】そして、先行回動部材41の側面に立設し
たピン43と、遊星ギヤ30の側面に立設したピン42
とにわたって先行回動部材41のボス部41bにループ
状に巻回された板バネ44を張設してあり、上述したよ
うな接当操作による先行回動に伴ってこの板バネ44の
バネ付勢力により遊星ギヤ30が連動して先行回動する
ように構成されている。その結果、苗取り出し作動時に
おいて、図10(イ),(ロ)に示すように、操作部4
0aがギヤ部よりも大径に設けられる結果、わずかにギ
ヤ部に先行して、接当部41aを回動させ、第2中間ギ
ヤ32に対して遊星ギヤ30が少しだけ先行する状態で
回動することになり、植付爪支持ケース13が予め後退
した状態で苗取り出しが実行されることになり、バック
ラッシュによるガタつきが解消された状態で、苗取り出
し作用が行われることになる。尚、図10の(イ)は接
当開始時、(ロ)は先行回動作動中、(ハ)は接当作用
終了時を夫々示している。 【0027】尚、前記接当部41a及び操作部40aが
夫々所定ピッチをあけて一対設けられ、苗の取り出し作
動時だけでなく圃場への植付け作動時におけるガタツキ
も防止するように構成してある。 【0028】〔別実施例〕本発明は上記実施例以外に、
図11及び図12に示すように、相対回動手段Sを、前
記実施例における太陽ギヤ23と遊星ギヤ30とを直接
咬合させると共に、遊星ギヤ30で駆動される軸51か
らの動力を、該軸51に備えたサイドギヤ52を介して
デフケース53に支承された一対のピニオンギヤ54に
伝え、更に、このピニオンギヤ54に咬合する他方側の
サイドギヤ52を介して、支持軸14に動力を伝えるよ
うに伝動系を形成し、又、太陽ギヤ23と一体形成した
偏芯カム55に遊嵌するリング56とデフケース53の
アーム53Aとをロッド57を介して連係することで、
回転ケース10が1回転すると支持軸14を逆方向に1
回転させると同時に、この回転時にデフケース53が軸
芯X2周りに揺動操作されることで支持軸14の角速度
を前記実施例と同様に変化させるよう構成することが可
能であり、この相対回動手段Sを備えた系に本発明の構
成を附加して実施することも可能である。この別実施例
では実施例と共通する部材に実施例と同じ番号符号を附
している。 【0029】又、本発明は相対回動手段Sに楕円ギヤ等
の非円形ギヤを用いたものに適用することも可能であ
る。 【0030】尚、特許請求の範囲の項に図面との対照を
容易にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating case rotatably supported around a horizontal axis with respect to a planted transmission case, and to a rotating case opposite to the horizontal axis. A pair of planting claw supports to which seedling planting claws are attached, respectively, rotatably about two axes eccentric in the direction around an axis parallel to the horizontal axis, The tip of each of the seedling-claws is provided between each support shaft that pivotally supports the planting-claw support in an integrally rotating state and the planting transmission case, as the rotating case rotates. But,
In order to draw substantially elliptical trajectories substantially overlapping in a side view, relative rotation means for driving the respective support shafts to rotate relative to the rotation case in a direction opposite to the rotation direction is interposed, and The present invention relates to a seedling planting mechanism in which a nail support and each of the support shafts are fixed by being flange-connected to each other, and more particularly to an improvement in a connection fixing structure between the planted nail support and the support shaft. . 2. Description of the Related Art Conventionally, a seedling planting mechanism configured as described above is disclosed in Japanese Patent Publication No. Hei 6-20371. In this conventional example, a support shaft (see, A flange connecting portion (same as above) integrally formed with the case supporting member 37).
The flange connecting portion (the base 38a) integrally formed with the planting claw support (the planting claw case 38) is connected and fixed to the flange 37a) with a bolt. [0003] In the structure of the prior art, when connecting the planting claw support and the support shaft, the bolts are connected in a state where the respective flange connecting portions are overlapped as judged from the drawing. An operation of inserting and tightening with a box wrench or the like is performed. Also, when this part is separated for the purpose of inspection and maintenance, the bolt is loosened using a box wrench or the like, and the bolt is artificially removed. But,
Not only in this conventional example, but also in the conventional seedling planting mechanism, since the portion where the flange is formed is located at a position overlapping with the trajectory of the tip of the seedling planting nail of the other planting nail support, the rotating case Depending on the posture in which the rotation of the drive case 28) is stopped, the seedling-planting claw (the same as the planting claw 45) or the planting-claw support in a side view (viewed in a direction along the axis of the support shaft). There is room for improvement because the distal end portion is in a positional relationship to overlap with the flange connection portion, and the attachment and detachment of the flange connection portion may be hindered, such as the seedling mounting claw preventing the insertion of the box wrench. In this kind of seedling planting mechanism, when the rotating case makes one rotation, the planting claw support performs one rotation in the reverse direction. In the configuration of FIG. 2, the circular locus of the tip of the seedling planting claw when one planting claw support makes one rotation with respect to the rotating case is the rotational axis (cam shaft 32) of the other planting claw support. (The center of the shaft) can be greatly overlapped (it can be understood by drawing with a compass). As described above, depending on the posture of the planting nail support with respect to the rotating case, the flange connecting portion may overlap with the seedling planting nail. Can be explained. [0005] It is an object of the present invention to rationally configure a seedling planting mechanism capable of easily connecting and separating the planting claw support and the support shaft regardless of the posture of the planting claw support with respect to the rotating case. Is to do. SUMMARY OF THE INVENTION As described at the outset, a feature of the present invention is that a planting claw support having seedling planting claws at two positions of a rotating case supported by a planting transmission case, respectively. The tip of each seedling-claw with the rotation of the rotating case, between each supporting shaft that supports the body and supports each planting-claw support in a rotating state integrally with the planting transmission case. A relative rotation means for driving the respective support shafts to rotate relative to the rotating case in the opposite direction so that the portions draw a substantially elliptical locus substantially overlapping in side view is provided, and each planted claw support and each support shaft are interposed. In the seedling planting mechanism fixed by flange connection, respectively,
Push the seedling extruder into the cam shaft located at
A cam is formed and a pair of camshafts are erected over them
With the connecting rod fixed and with the rotation of the rotating case
Each of the flange connecting portions, which are configured to rotate integrally and connect the planting claw support members and the support shafts, respectively, with the seedling planting members located on opposite sides in a side view. It is located in a state of being positioned on the outer side of the tip trajectory of the nail, and its operation and effect are as follows. According to the above-mentioned feature, since each flange connection portion is located on the outer side of the tip trajectory of the seedling-claw in side view, one of the planting-claw support members and the support shaft are flange-connected. In the case of connecting at the site, when separating, regardless of the rotation posture of the rotating case, the tip portion of the seedling claw or the planting claw support does not overlap with the flange connection portion, and this flange connection portion Can be operated without hindering the insertion of a box wrench or the like when operating a bolt or the like that connects the two. Accordingly, a seedling planting mechanism that can easily connect and separate the planting claw support and the support shaft irrespective of the posture of the planting claw support with respect to the rotating case is reasonable. It was composed. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a seedling planting device provided in a traveling machine body. In this seedling planting apparatus, a square pipe-shaped main frame 1 is arranged along the lateral width direction of the fuselage, and a feed case 2 to which power from the fuselage side is transmitted is attached to a substantially central portion of the main frame 1 in the lateral width direction. A plurality of planting transmission cases 3 are attached so as to extend rearward at appropriate intervals in the width direction, and these constitute a frame body. Then, a frame 4 supports the seedling rest 4 which reciprocates at a constant stroke in the lateral direction of the machine body, and cuts out a part of the mat seedling placed on the seedling rest 4 to be planted in a field. The planting mechanism 5 is disposed on each of the left and right sides of the rear portion of each planting transmission case 3. Next, the configuration of each seedling planting mechanism 5 will be described. As shown in FIG. 2, a drive shaft 8 to which rotational power is transmitted from the feed case 2 via a transmission chain (not shown) is rotated at a rear portion of the planting transmission case 3 so as to protrude outward in the lateral direction. A rotating case 10 is movably supported by bearings 9, and is attached to an outwardly projecting portion of the drive shaft 8 so as to rotate integrally. That is, a notch k is formed in a part of the outer peripheral portion of the protruding end of the drive shaft 8, and the taper pin 11 is formed in the bearing 10 a of the rotating case 10 in a direction orthogonal to the axis of the drive shaft 8. The drive shaft 8 and the rotating case 10 rotate integrally with each other while preventing the rotating case 10 from coming off. The rotating case 10 is provided with seedlings so as to be rotatable relative to two parallel axes X2 and X3 having a rotation phase difference of 180 degrees with respect to the axis X1 of the drive shaft 8. A pair of planting claw support cases 13 as a pair of planting claw supports to which the pawls 12 are attached are separately supported by support shafts 14. As shown in FIGS. 2 to 4, the seedling mounting claws 12 are attached to and supported by the planting nail support cases 13, and are held by the seedling mounting claws 12 in accordance with the seedling operation. A seedling extruding tool 15 is provided for extruding seedlings into a field. A cam shaft 16 located on an extension of the axis of the support shaft 14 is rotatably supported by bearings in the planting claw support case 13. The cam shaft 16 has a cam for pushing out the seedling extruder 15. 17 are formed.
The camshaft 16 is bolted together with the camshaft 16 on the other side to a connecting rod 18 spanned thereover, and integrally rotates with the rotation of the rotating case 10. A balance arm 20 is pivotally supported on the seedling extruding tool 15 via a link 19, and a cam follower 21 acting on the cam 17 is provided at the opposite end of the balance arm 20. Return spring 2 for urging the balance arm 20 to swing in a direction in which the balance arm 20 presses the cam 17
2 is provided. As will be described later, the planting claw support case 1
3 rotates relatively to the rotating case 10, so that the planting claw support case 13 and the cam shaft 16 rotate relatively within a predetermined rotation range. Accordingly, with the relative rotation, the action of the cam 17 provided on the cam shaft 16 causes the seedling pushing-out tool 15 to relatively move in the seedling pushing direction with the planting operation against the return biasing force of the return spring 22. It is configured to move to. A gear for relatively rotating the planting claw support case 13 and the rotating case 10 so that the tip of the planting claw 12 draws a substantially elliptical trajectory in a side view with the rotation of the rotating case 10. A relative rotation means S of the type is provided. More specifically, inside the rotating case 10,
Bearing boss 3a of drive shaft 8 in planting transmission case 3
A circular sun gear 23 is idlely fitted on the drive shaft 8 in a state where rotation is prevented by meshing with the drive shaft 8 in the axial direction of the drive shaft 8 via the meshing portion A. A support shaft 14 that supports the claw support case 13 is rotatably supported inside the rotary case 10 by bearings 24 and 25 on both left and right sides in a double-supported state. The support shaft 14 protrudes outward from the rotating case 10 toward the outside on the side opposite to the planting transmission case 3, and a flange connection formed integrally with the outer protrusion of the support shaft 14. The flange connecting portion 27 formed on the planting claw support case 13 is tightened and connected to the portion 26 with a pair of bolts 28, 28, and a shaft portion of the support shaft 14 on the outer end side with respect to the flange connecting portion 26 is planted. The claw support case 13 is configured to be fitted into the insertion hole 29 to support the planted claw support case 13 in a positioned state. As will be described later, when the rotating case 10 makes one rotation around the axis X1, the respective planting claw supporting cases 13, 13 provided in the rotating case 10 move in opposite directions around the axes X2, X3. In this rotation, the seedling claw 1 of one of the planting claw support cases 13 is viewed from the side.
The two flange connecting portions 26 of the other planting claw support case 13 are located on the outer side of a trajectory F (a circular trajectory, see FIG. 4) when the distal end of the second rotating member 10 rotates with respect to the rotating case 10. 27
The flange connection portions 26 and 27 are formed so that
Further, when the relative positional relationship is set and the bolt 28 is rotated with a box wrench or the like, when the bolt 28 is artificially operated, the other seedling claw 12 or the planted claw support case 13 is not used. It is configured so as not to interfere. As shown in FIG. 5, the flange connecting portion 2
6, an arm 26A is integrally formed.
An adjusting mechanism having a screw member 46 screwed to the projecting portion 13A and a lock nut 47 is provided between the projecting portion 13A of the planting claw supporting case 13 and the projecting portion 13A. The configuration is such that the relative rotation posture between the flange connection portion 26 and the planting claw support case 13 around the axis X2 or the axis X3) can be adjusted. In the rotating case 10, a circular planetary gear 30 is fitted around the spline so as to be rotatable integrally with the support shaft 14, and an intermediate transmission portion between the planetary gear 30 and the sun gear 23 is provided with respective rotations. An eccentric crank type rotation transmission mechanism D is provided for rotating the circular first intermediate gear 31 and the circular second intermediate gear 32 whose axis is displaced at an unequal speed. The first intermediate gear 31 meshes with the sun gear 23 and has the same number of teeth as the sun gear 23. The second intermediate gear 32 meshes with the planetary gear 30 and has the same teeth as the planetary gear 30. And the rotation axis X4 of the first intermediate gear 31 is
The respective rotation support shafts 33 and 34 are bearing-supported by the rotation case 10 in a state where they are eccentric to the side farther from the sun gear 23 than the second rotation axis X5. Each rotating shaft 33,
The intermediate gears 3 are provided in such a manner as to project laterally in opposite directions to the respective intermediate gears 31 and 32.
The first and second shafts 32 are supported to the rotating case 10 in a cantilever manner. The transmission portion is integrally formed on the side of the second intermediate gear 32 opposite to the rotation support shaft 34, that is, on the side opposite to the first intermediate gear 31 and eccentric from the rotation axis. Is provided. As shown in FIG. 6, the crank roller 35 is made of an abrasion-resistant material, and is rotatably fitted to a pin 36 integrally projecting from a side surface of the second intermediate gear 32.
Also, the first intermediate gear 31 has a side opposite to the rotation support shaft 33,
That is, the crank roller 35 is engaged with the side facing the second intermediate gear 32,
A pair of ridges 3 forming a groove portion 38 as a transmission portion for transmitting a rotational force while allowing a radial displacement of the shaft 3.
9, 39 are formed. When the intermediate gears 31 and 32 are assembled in the rotating case 10, the end faces opposing each other, that is, the end face on the opposite side of the ridge 39 and the opposing side of the second intermediate gear 32. Are arranged so as to be in contact with the side surfaces of. In this way, the drive reaction force accompanying the seedling planting operation generated due to the configuration supported in a cantilever manner with respect to the rotating case 10 abuts and supports the gears from inclining, so that the gears can be brought into contact with each other. The configuration is such that it can be prevented. With such a configuration, the rotating case 1
When the first intermediate gear 31 rotates one revolution around the axis of the drive shaft 8 while maintaining the meshing state with the sun gear 23 with the rotation of 0, the planting claw support case 13 is inverted with respect to the rotating case 10. It will rotate by one rotation in the direction. Here, if the planetary gear 30 is in mesh with the first intermediate gear 31, the planetary gear 30 can be moved to the first intermediate gear 31.
Is rotated by one rotation in the opposite direction, so that it is the same as a state in which it does not rotate relatively. However, by providing the relative rotation means S as described above, the second intermediate gear 32 provided with the crank roller 35 rotated by the ridge 39 provided on the first intermediate gear 31 is provided. Due to the eccentricity of the rotation axis, the relative rotation peripheral speed changes in one fluctuation cycle for one rotation of the rotating case 10. As a result, although only the circular gear is used, the rotation angle of the planetary gear 30 periodically fluctuates according to the rotation of the rotating case 10 as shown in FIG. As shown in FIG. 1, the trajectory of the tip of the attachment claw 12 is
While drawing a substantially elliptical trajectory in a side view, the seedling placement claw 12 swings up and down relatively, and an appropriate seedling placement operation is performed. In addition, the support shaft 14 that supports the planting claw support case 13 is supported by the bearings in the rotating case 10 on both left and right sides in a double-supported state, and can be firmly supported. When the seedlings 12 come into contact with the seedlings on the seedling rest 4, they receive a strong impact reaction in the direction opposite to the rotation direction of the rotating case 10. Is the same as the drive rotation direction of the planetary gear 30, so that the backlash of the gear meshing portion corresponds to the backlash, so that the seedling placement claw 12 moves in the direction opposite to the moving direction (the rotation direction of the rotating case 10). There is a possibility that the seedlings may move, and as a result, smooth removal of the seedlings may not be performed. Therefore, a play removing mechanism for reducing such play is provided. That is, as shown in FIGS. 8 and 9, an operation portion in which two operation portions 40a projecting radially outward from the gear tooth tip are formed at the lateral portion of the second intermediate gear 32. A leading rotating member in which a member 40 is provided so as to be rotatable integrally, and two contact portions 41a each having a tip portion substantially coinciding with a gear pitch circle are formed at a position corresponding to the operating member 40 on the support shaft 14. 41 is provided so as to be freely rotatably fitted to the support shaft 14. The preceding rotating member 41 is configured to be rotated by being brought into contact with a pin 42 erected on the side surface of the planetary gear 30, and the contact portion 41 a is slightly moved by the operating portion 40 a with the rotation by gear engagement. In a state in which the rotation is performed earlier than the rotation, and the operation portion 40a protruding from the gear tooth tip contacts the abutment portion 41a to slightly advance the rotation due to the gear engagement, The preceding rotation member 41 is configured to rotate ahead. A pin 43 erected on the side surface of the preceding rotary member 41 and a pin 42 erected on the side surface of the planetary gear 30.
A leaf spring 44 wound in a loop is stretched around the boss 41b of the preceding rotating member 41, and the leaf spring 44 is attached with the preceding rotation by the contact operation described above. The planetary gear 30 is configured to rotate forward in conjunction with the power. As a result, at the time of the seedling removal operation, as shown in FIGS.
As a result, the contact portion 41a is rotated slightly ahead of the gear portion, and the planetary gear 30 is rotated slightly ahead of the second intermediate gear 32. The seedlings are taken out in a state in which the planting claw support case 13 is retracted in advance, and the seedling taking-out action is carried out in a state in which rattling due to backlash is eliminated. 10A shows the state at the time of starting the contacting, FIG. 10B shows the state during the preceding rotation operation, and FIG. The contact portion 41a and the operation portion 40a are provided in a pair at a predetermined pitch, respectively, so as to prevent rattling not only at the time of the operation of taking out the seedlings but also at the time of the planting operation in the field. . [Alternative Embodiment] The present invention, in addition to the above embodiment,
As shown in FIGS. 11 and 12, the relative rotation means S causes the sun gear 23 and the planetary gear 30 in the above-described embodiment to directly mesh with each other, and the power from the shaft 51 driven by the planetary gear 30 is applied to the relative rotation means S. Power is transmitted to a pair of pinion gears 54 supported by a differential case 53 via side gears 52 provided on a shaft 51, and further transmitted to the support shaft 14 via the other side gears 52 engaged with the pinion gears 54. By forming a system and linking a ring 56 loosely fitted to an eccentric cam 55 integrally formed with the sun gear 23 with an arm 53A of the differential case 53 via a rod 57,
When the rotating case 10 makes one rotation, the support shaft 14 is rotated by 1 in the reverse direction.
Simultaneously with the rotation, the angular velocity of the support shaft 14 can be changed in the same manner as in the above embodiment by swinging the differential case 53 around the axis X2 during this rotation. It is also possible to add and implement the configuration of the present invention to a system provided with the means S. In this alternative embodiment, members common to the embodiment are given the same reference numerals as in the embodiment. The present invention can also be applied to a device using a non-circular gear such as an elliptical gear as the relative rotation means S. In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

【図面の簡単な説明】 【図1】苗植付装置の側面図 【図2】苗植付機構の横断平面図 【図3】回転ケースの縦断側面図 【図4】植付爪支持ケース及びフランジ連結部を表す縦
断側面図 【図5】フランジ連結部の調節構造の側面図 【図6】回転伝動機構の分解斜視図 【図7】植付爪支持ケースの相対揺動角変化を示す図 【図8】非作用姿勢のガタ取り機構の側面図 【図9】作用姿勢のガタ取り機構の側面図 【図10】(イ)はガタ取り機構の非作用姿勢でのギヤ
の接当状態を表す拡大図 (ロ)はガタ取り機構の作用姿勢でのギヤの接当状態を
表す拡大図 (ハ)はガタ取り機構の作用が解除された直後のギヤの
接当状態を表す拡大図 【図11】別実施例の回転ケースの横断平面図 【図12】別実施例の偏芯カムとデフケースの連係を表
す側面図 【符号の説明】 3 植付伝動ケース 10 回転ケース 12 苗植付爪 13 植付爪支持体 14 支持軸 26,27 フランジ連結部 F 先端軌跡 S 相対回動手段 X1 横軸芯 X2,X3 軸芯
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a seedling planting apparatus; FIG. 2 is a cross-sectional plan view of a seedling planting mechanism; FIG. 3 is a longitudinal side view of a rotating case; FIG. FIG. 5 is a side view of an adjustment structure of the flange connection part. FIG. 6 is an exploded perspective view of a rotary transmission mechanism. FIG. 7 is a view showing a relative swing angle change of a planting claw support case. FIG. 8 is a side view of the play removing mechanism in a non-operating position. FIG. 9 is a side view of the play removing mechanism in an operating position. FIG. 10A shows the gear contact state in the non-operative position of the play removing mechanism. (B) is an enlarged view showing the contact state of the gears in the action posture of the play removing mechanism (c) is an enlarged view showing the contact state of the gears immediately after the action of the play removing mechanism is released 11 is a cross-sectional plan view of a rotating case according to another embodiment. [FIG. 12] A side view showing the linkage between an eccentric cam and a differential case according to another embodiment. DESCRIPTION OF SYMBOLS 3 Planting transmission case 10 Rotating case 12 Seedling planting claw 13 Planting claw support 14 Support shafts 26, 27 Flange connecting portion F Tip trajectory S Relative rotation means X1 Horizontal axis X2, X3

Claims (1)

(57)【特許請求の範囲】 【請求項1】 植付伝動ケース(3)に対して横軸芯
(X1)周りで回転自在に支持された回転ケース(1
0)における、前記横軸芯(X1)から互いに反対方向
に偏芯した2箇所の夫々に、 前記横軸芯(X1)と平行な軸芯(X2),(X3)周
りで相対回動自在に、苗植付爪(12),(12)が取
付けられた一対の植付爪支持体(13),(13)を軸
支し、 前記各植付爪支持体(13),(13)を一体的に回動
する状態で軸支する各支持軸(14),(14)と、前
記植付伝動ケース(3)との間に、 前記回転ケース(10)の回転に伴って、前記各苗植付
爪(12),(12)の先端部が、側面視でほぼ重複す
る略楕円軌跡を描くように、前記各支持軸(14),
(14)を前記回転ケース(10)に対してその回転方
向と逆方向に相対回動駆動させる相対回動手段(S),
(S)を介装し、 前記各植付爪支持体(13),(13)と、前記各支持
軸(14),(14)とを、夫々、フランジ連結させて
固定してある苗植付機構であって、前記各支持軸(14),(14)の軸芯延長上に位置す
るカム軸(16),(16)に苗押し出し具(15)を
押し出し作動させるカム(17)が形成され、一対のカ
ム軸(16),(16)はそれらにわたって架設された
連結杆(18)に固定連結して回転ケース(10)の回
転に伴って一体的に回動するように構成すると共に、 前記各植付爪支持体(13),(13)と、前記各支持
軸(14),(14)とを、夫々連結させるフランジ連
結部(26),(27)の夫々を、側面視において、反
対側に位置する苗植付爪(12)の先端軌跡(F)の外
方側に位置させる状態で配置してある苗植付機構。
(1) A rotating case (1) rotatably supported around a horizontal axis (X1) with respect to a planting transmission case (3).
In (0), two positions eccentric from the horizontal axis (X1) in opposite directions to each other are relatively rotatable around axes (X2) and (X3) parallel to the horizontal axis (X1). A pair of planting claw supports (13), (13) to which seedling-planting claws (12), (12) are attached; and supporting the planting claw supports (13), (13). Between each of the supporting shafts (14), (14), which are pivotally supported in a state of being integrally rotated, and the planting transmission case (3), with the rotation of the rotating case (10). Each of the support shafts (14), (14), (14), (14), (14) is such that the tip of each seedling-claw (12), (12) draws a substantially elliptical trajectory substantially overlapping in side view.
Relative rotation means (S) for relatively rotating the (14) relative to the rotating case (10) in a direction opposite to the rotation direction thereof,
(S) is interposed, and the seedling support members (13) and (13) and the support shafts (14) and (14) are fixed to each other by flange connection. An attachment mechanism, which is located on the axis extension of each of the support shafts (14), (14).
Seedling pusher (15) on the camshafts (16) and (16)
A cam (17) for pushing operation is formed, and a pair of cams (17) are formed.
Shafts (16), (16) are erected over them
The rotating case (10) is fixedly connected to the connecting rod (18).
A flange that is configured to rotate integrally with the roll, and that connects the planted claw supports (13) and (13) to the support shafts (14) and (14), respectively. Seedlings arranged such that each of the connecting portions (26) and (27) is located outside the tip trajectory (F) of the seedling-attached claw (12) located on the opposite side in a side view. Attached mechanism.
JP07852595A 1995-04-04 1995-04-04 Seedling planting mechanism Expired - Fee Related JP3377329B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07852595A JP3377329B2 (en) 1995-04-04 1995-04-04 Seedling planting mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07852595A JP3377329B2 (en) 1995-04-04 1995-04-04 Seedling planting mechanism

Publications (2)

Publication Number Publication Date
JPH08275637A JPH08275637A (en) 1996-10-22
JP3377329B2 true JP3377329B2 (en) 2003-02-17

Family

ID=13664348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP07852595A Expired - Fee Related JP3377329B2 (en) 1995-04-04 1995-04-04 Seedling planting mechanism

Country Status (1)

Country Link
JP (1) JP3377329B2 (en)

Also Published As

Publication number Publication date
JPH08275637A (en) 1996-10-22

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