JP2004298045A - Seedling-planting apparatus - Google Patents

Seedling-planting apparatus Download PDF

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Publication number
JP2004298045A
JP2004298045A JP2003093602A JP2003093602A JP2004298045A JP 2004298045 A JP2004298045 A JP 2004298045A JP 2003093602 A JP2003093602 A JP 2003093602A JP 2003093602 A JP2003093602 A JP 2003093602A JP 2004298045 A JP2004298045 A JP 2004298045A
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JP
Japan
Prior art keywords
seedling
gear
final
rotating body
planting
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JP2003093602A
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Japanese (ja)
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JP4396121B2 (en
JP2004298045A5 (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
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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 JP2003093602A priority Critical patent/JP4396121B2/en
Priority to CNB200410003752XA priority patent/CN1295952C/en
Priority to KR1020040005960A priority patent/KR100694651B1/en
Publication of JP2004298045A publication Critical patent/JP2004298045A/en
Publication of JP2004298045A5 publication Critical patent/JP2004298045A5/ja
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling-planting apparatus which can accurately operate two row seedling-planting tools in one rotary case without adding an unreasonable power to an operation mechanism. <P>SOLUTION: This seedling-planting apparatus is characterized by rotatably disposing laterally directed final shafts 25 on a rotator 21 capable of being rotated on a lateral rotation axis at places shifted from the rotation axis, integrally attaching seedling-planting tools 26 to the final shafts at positions laterally projected from the rotator 21, and transmitting powers to final gears 39 integrally rotated with the final shafts 25 through the line of gears 35, 36, 37, 38, and 39 disposed on the rotator 21. The seedling-planting tools 26 are disposed on the rotator 21 in its rotation direction, and the power is transmitted to a final gear 39 for each final shaft 25 through the second counter gear 38 attached to a common shaft 61. <P>COPYRIGHT: (C)2005,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予想される。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、最終ギヤを複数設け、共通のカウンタ軸に取り付けた複数の第二カウンタギヤから各最終ギヤへ伝動する構成とした。
【0010】
請求項3に記載の苗植付装置は、請求項2の内容に加え、第二カウンタギヤを回転体の回転中心線上に設けた。
【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、側面視で最終ギヤの一部が回転体よりも外側に突出させた。
【0012】
請求項5に記載の苗植付装置は、請求項2乃至4のいずれかの内容に加え、第二カウンタギヤ及び最終ギヤが不等径ギヤであり、最終ギヤが回転体の回転による移動経路の下位に位置するとき当該最終ギヤの最大外径部が上側になるようにした。
【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、苗植付具の移動軌跡は全体的には上下方向に長い環状で、かつ苗植付具が下死点からさらに後方へ移動する行程を含む形状とした。
【0014】
請求項7に記載の苗植付装置は、請求項1乃至6のいずれかの内容に加え、苗植付具は、苗載台の苗を取り出す苗取り爪と、該苗取り爪に保持されている苗を押し出して圃場に植付ける苗押出体とを備え、該苗押出体の作動機構を、苗押出体を押し出し方向に付勢する付勢体と、苗押出体の押し出し方向への移動を規制するカム機構とを組み合わせて構成し、前記付勢体を前記苗取り爪に対し左右にずらせて配置した。
【0015】
【発明の効果】
請求項1乃至7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。
【0016】
請求項2及び3の構成とすると、少ないギヤ数でギヤ列を構成することができ、軽量化及びコストダウンが図れる。特に、請求項3の構成とすると、請求項2の構成を無理なく実現することができる。
【0017】
また、請求項4の構成とすると、回転体を小型することが可能で、それにより作動の安定化、作動の高速化、軽量化、コストダウンが図れる。請求項5の構成とすると、最終ギヤが取り付けられている最終軸と地面との距離を近づけることができるので、苗植付深さの調節範囲を広くすることが可能になる。
【0018】
請求項6の構成とすると、苗を植付けた後の苗植付具が先行の苗植付具が植付けた苗に影響を与えにくいので、回転体の回転方向に多数の苗植付具を設けることが可能になる。請求項7の構成とすると、回転体の回転方向に多数の苗植付具を設ける場合、苗植付具同士が干渉しないように苗植付具をコンパクトにできる。
【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,…が分離して取り出し圃場に植付ける。
【0021】
苗植付装置14は、図3乃至図7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、その内側に回転体(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。回転体21には、その回転中心線24を中心とする円周上に互いに120度の位相で3本の最終軸25,25,25が回動自在に設けられ、それぞれの最終軸の回転体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】
回転体21の内部には、該ケースと一体回転する駆動ギヤ30が設けられている。この駆動ギヤ30を植付伝動部12aの後端部に設けた入力ギヤ31で減速回転させることにより、回転体21が回転する。なお、入力ギヤ31へ伝動するチェーン伝動装置32のスプロケット32aから入力ギヤ31への伝動部には、伝動を切ったとき該ギヤが所定の位相で停止する停止クラッチ33が設けられている。
【0023】
図6に駆動ギヤ30と入力ギヤ31との噛み合い状態が表されている。一見するでは分かりにくいが、駆動ギヤ30の歯数は入力ギヤ31の歯数の3倍であり、駆動ギヤ30は丸印を付けた3箇所(図6における入力ギヤ31との噛み合い位置を基準として0。,120。,240。の位置)が最大径となる不等径ギヤ、入力ギヤ31は丸印を付けた1箇所(図6における駆動ギヤ30の噛み合い位置を基準として0。の位置)が最小径となる不等径ギヤになっている。したがって、駆動ギヤ30が0。,120。,240。の位置で入力ギヤ31と噛み合うときに、駆動ギヤ30の回転速度が速くなり、駆動ギヤ30の回転速度は1/3周期で変化する
【0024】
また、回転体21の内部には、最終軸25,25,25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、回転体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と、該第一カウンタギヤと一体回転する3個の第二カウンタギヤ38,38,38と、最終軸25,25,25に取り付けられ各第二カウンタギヤとそれぞれ個別に噛合する最終ギヤ39,39,39とからなっている。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、回転体21の回転に連動して前記作動をする。第二カウンタギヤ38及び最終ギヤ39は非円形ギヤ(不等径ギヤ)である。
【0025】
回転体21が回転すると、3個の苗植付具26,26,26が円軌道を移動する。そのとき、回転体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25,25,25へ伝達され、図8乃至図11に示すように、苗植付具26,26,26の姿勢が変化する。これにより、苗植付具26は、後記苗取り爪47の先端が軌跡Pを描くように作動する。機体の移動を加味した苗取り爪47の先端動軌跡は図12のようになる。各先端動軌跡P′(1〜3)は機体の移動速度の違いによるもので、P′(1)、P′(2)、P′(3)の順に移動速度が速い。軌跡Pにおいて下死点である苗植付位置Bからさらに後方へ移動する行程Cが含まれていることにより、動軌跡P′(1〜3)では苗取り爪47が苗植付位置Bを通過後ほぼ真上へ移動するようになっている。
【0026】
さらに、回転体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3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、後述する苗取出し及び苗植付けの動作が正確に行われるように作用する。
【0027】
各苗植付具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取り爪47と、該苗取り爪の下側で突出・後退作動をする苗押出体48とが設けられている。
【0028】
苗押出体48の作動機構は次のようになっている。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。各最終軸25,…の押出カム50,…は、個別に回転しないように連結プレート50aによって互いに連結されている。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、付勢体である押出スプリング56によって押出ロッド54を突出させる側に付勢されている。押出スプリング56は苗取り爪47に対し左右にずらせて配置されているため、苗植付具26が苗押出体48の押し出し方向にコンパクトになり、回転体21の回転方向に設けられた3個の苗植付具26が互いに干渉するのを防いでいる。
【0029】
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。
【0030】
乗用田植機1での作業時、前述したように、3個の苗植付具26,26,26が先端軌跡Pを描きながら同一軌道上を互いに1/3周期の間隔を保ったまま移動する。苗取出位置Aで苗取り爪47が苗取出口16の苗を一株分に分離して取り出す。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、苗取り爪47が保持している苗の土部を下向きに押すことにより、苗を苗取り爪47から押し出して圃場に植付ける。その後、苗植付具26はさらに後方に移動してから、下動時よりも後方の軌道を通って上動する。図12の動軌跡P′(1〜3)に示されているように、苗取り爪47が苗植付位置Bを通過後ほぼ真上へ移動するため、先行する苗植付具26が植付けた苗に干渉しない。苗植付位置Bから苗取出位置Aへ移動するまでの間に、苗押出体48は後退する。
【0031】
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回転体21の左右両側に苗植付具26を設け、1個の回転体で同時に2条に苗を植付けるとともに、各条に3個の苗植付具を設け、高速植付けが可能な構成になっている。上記構成を実現し、しかも機能性向上、コスト低減を図るため、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。
【0032】
まず、固定支持体20は分割面60で前後に2分割されており、植付伝動部12aと一体の前部材20aに対して後部材20bを結合ボルト61,…で結合する構成になっている。このように固定支持体20を分割することにより、固定支持体20の後半分を取り外すことができるので、回転体21のメンテンスが容易である。
【0033】
次に、3本の最終軸へ伝動するギヤ列は、回転体21の回転中心線24上に配置した共通のカウンタ軸62に1個の第一カウンタギヤ37と3個の第二カウンタギヤ38,38,38とを取り付け、各第二カウンタギヤを対応する最終ギヤ39,39,39にそれぞれ噛合させ、1本のカウンタ軸62から3本の最終軸25,25,25へ動力を分岐して伝動する構成としている。これにより、少ないギヤ数で有効なギヤ列を構成することができ、軽量化及びコストダウンが図れるようになる。この場合、本実施形態のように、側面視で3本のうち1本の最終軸25とカウンタ軸62とを通る直線上に、回転ギヤ35及び中間ギヤ36を取り付けた中間軸63を配置するとよい。
【0034】
また、回転体21の左右中央に駆動ギヤ30を設け、その左右一方(図示例では右側)に回転ギヤ35及び固定ギヤ40を配置し、反対側に中間ギヤ36、第一カウンタギヤ37、第二カウンタギヤ38,38,38、及び最終ギヤ39,39,39を配置した構成としている。なお、駆動ギヤ30は中心部が開口しており、この開口部30aにカウンタ軸62及び中間軸63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。
【0035】
前述のように最終ギヤ39は非円形ギヤ(不等径ギヤ)であるため、回転体21の回転位置によって最終軸25に対して最終ギヤ39が外側に張り出す幅が異なる。そこで、最終ギヤ39の最大外径部が外側にくる箇所については、側面視で最終ギヤ39の一部が回転体21よりも外側に突出させ、それに対応する部分20aだけ固定支持体20の外形を大きくした形状としている(図6、図7参照)。これにより、固定支持体20を必要以上に大きくすることなく、回転体21を小型化できる。
【0036】
このような不等径の最終ギヤ39を採用する場合は、最終ギヤ39が移動経路の下位に位置するとき当該最終ギヤの最大外径部が上側になるようにすれば、最終軸25を地面に近づけることが可能になり、苗植付深さの調節範囲を広くできる。
【0037】
さらに、前述のように、入力ギヤ31と駆動ギヤ30との歯数比を苗植付具26の数と同じ「3」とするとともに、両ギヤ30,31を不等径ギヤとすることにより、駆動ギヤ30の回転速度が1/3周期で変化するように不等速駆動回転させているが、駆動ギヤ30の回転速度が速くなるのは回転体21の回転中心線24よりも後側に2個の苗植付具26,26が位置するときに設定している。換言すれば、上動する苗植付具(回転体21の回転中心線24よりも後側に位置する)の数の方が下動する苗植付具(回転体21の回転中心線24よりも前側に位置する)の数より多いとき回転体21の回転速度が遅いということであり、回転体21の回転安定に効果がある。
【0038】
入力ギヤ31と駆動ギヤ30の組み合わせによる減速機構を回転体21への伝動の直前に配置することにより、停止クラッチ33の配置の自由度が高くなり、例えば本実施形態のように植付伝動部12aの後端部に停止クラッチ33を設けることができる。また、停止クラッチ33を、回転体21の左右両側に設けられる2条の苗植付装置の両方に共用させることができる。
【0039】
停止クラッチ33により回転体21が停止してとき、いずれか1個の苗植付具26が回転体21の回転中心24の直上又は直下に位置するようになっている(例えば図3に示す位置)。このようにすると、3個の苗植付具の重量バランスが前後均等になるので、作動停止が確実に行われるとともに、停止位置が安定する。
【0040】
また、1個の苗植付具26が回転体21の回転中心線24の直上に位置する状態で回転体21が停止した場合(図3の状態)、下側の前後一対の苗植付具26,26は下端の高さが略同一になるので、作動停止時に地面から下側の苗植付具までの距離が適正に保たれ、苗植付具が地面と干渉するのを防げる。
【0041】
回転体21の停止時に苗植付具26が固定支持体20の後端よりも前側にあるので、後方の障害物に苗植付具が当たることが防げ、苗植付具の保護に有効である。
【0042】
以上に挙げた特徴的な構造は、固定支持体20や回転体21と、その内側に収容されているギヤ列とについてであり、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】一部を断面で表した苗植付装置の側面図である。
【図4】苗植付装置の展開断面図その1である。
【図5】苗植付装置の展開断面図その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】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9】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3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4である。
【図12】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 回転体
24 回転体の回転中心線
25 最終軸
26 苗植付具
30 駆動ギヤ
31 入力ギヤ
33 停止クラッチ
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
47 苗取り爪
48 苗押出体
50 押出カム
56 押出スプリング(付勢体)
[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 expected that damage and a decrease in planting accuracy due to 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]
According to a second aspect of the present invention, in addition to the first 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 that rotates integrally, a first counter gear that meshes with the intermediate gear, and a second counter gear that rotates integrally with the first counter gear and meshes with the final gear; The transmission is made from a plurality of second counter gears attached to the shaft to each final gear.
[0010]
According to a third aspect of the present invention, in addition to the contents of the second aspect, the second counter gear is provided on the rotation center line of the rotating body.
[0011]
In the seedling planting apparatus according to the fourth aspect, in addition to the contents according to any one of the first to third aspects, a part of the final gear projects outside the rotating body in a side view.
[0012]
According to a fifth aspect of the present invention, in addition to any one of the second to fourth aspects, the second counter gear and the last gear are unequal-diameter gears, and the last gear is a moving path by rotation of the rotating body. The maximum outer diameter portion of the final gear is located on the upper side when it is located below.
[0013]
In the seedling planting apparatus according to claim 6, in addition to the contents according to any one of claims 1 to 5, the movement trajectory of the seedling planting tool is generally annular in a vertically long direction, and the seedling planting tool is used. The shape includes the process of moving backward from the bottom dead center.
[0014]
In the seedling planting apparatus according to claim 7, in addition to the contents of any one of claims 1 to 6, the seedling planting tool is held by the seedling picking nail for taking out a seedling on the seedling mounting table and the seedling picking nail. A seedling extruded body for extruding seedlings and planting the seedlings in a field, and an urging body for urging the operating mechanism of the seedling extruded body in the pushing direction and moving the seedling extruded body in the pushing direction. , And the biasing body is arranged to be shifted left and right with respect to the seedling removing claw.
[0015]
【The invention's effect】
According to the configuration of claims 1 to 7, since the seedling-planting tools 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.
[0016]
According to the configuration of claims 2 and 3, the gear train can be configured with a small number of gears, so that weight reduction and cost reduction can be achieved. In particular, with the configuration of claim 3, the configuration of claim 2 can be realized without difficulty.
[0017]
Further, according to the configuration of the fourth aspect, it is possible to reduce the size of the rotating body, thereby stabilizing the operation, increasing the speed of the operation, reducing the weight, and reducing the cost. According to the configuration of claim 5, since the distance between the final shaft on which the final gear is attached and the ground can be reduced, the adjustment range of the seedling planting depth can be widened.
[0018]
According to the configuration of claim 6, since the seedling planting tool after planting the seedlings hardly affects the seedling planted by the preceding seedling planting tool, a large number of seedling planting tools are provided in the rotation direction of the rotating body. It becomes possible. With the configuration of claim 7, when a large number of seedling planting tools are provided in the rotation direction of the rotating body, the seedling planting tools can be made compact so that the seedling planting tools do not interfere with each other.
[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 aircraft is advanced with the floats 15,... Grounded, the seedling mounting table 13 reciprocates left and right, and the mat seedlings on the table are sequentially transferred to the seedling taking-out ports 16,. , And the seedlings are separated and taken out 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 rotating body (rotary case) 21 is rotatably fitted via a bearing 22 and a bush 23 inside the fixed support 20. I have. The rotator 21 is provided with three final shafts 25, 25, 25 rotatably on a circumference centered on the rotation center line 24 at a phase of 120 degrees from each other. Seedling attachments 26 are integrally attached to both left and right end portions protruding from 21.
[0022]
A drive gear 30 that rotates integrally with the case is provided inside the rotating body 21. By rotating this drive gear 30 at a reduced speed with an input gear 31 provided at the rear end of the planting transmission section 12a, the rotating body 21 rotates. The transmission portion from the sprocket 32a of the chain transmission 32 that transmits to the input gear 31 to the input gear 31 is provided with a stop clutch 33 that stops the gear at a predetermined phase when the transmission is cut off.
[0023]
FIG. 6 shows a meshing state between the drive gear 30 and the input gear 31. Although it is difficult to understand at a glance, the number of teeth of the drive gear 30 is three times the number of teeth of the input gear 31, and the drive gear 30 has three circles (based on the meshing position with the input gear 31 in FIG. 6). (The positions of 0, 120, and 240) have the maximum diameter, and the input gear 31 is a circled position (the position of 0 based on the meshing position of the drive gear 30 in FIG. 6). ) Is an unequal-diameter gear with a minimum diameter. Therefore, the drive gear 30 is 0. , 120. , 240. When the input gear 31 meshes with the input gear 31 at the position, the rotation speed of the drive gear 30 increases, and the rotation speed of the drive gear 30 changes in 1/3 cycle.
Further, a gear train for transmitting power to the final shafts 25, 25, 25 is provided inside the rotating body 21. The gear train includes a rotating gear 35 that rotates while moving along a circular orbit about the rotation center line 24 of the rotating body 21, an intermediate gear 36 that rotates integrally with the rotating gear, and a first gear that meshes with the intermediate gear. A counter gear 37, three second counter gears 38, 38, 38 that rotate integrally with the first counter gear, and final gears that are attached to the final shafts 25, 25, 25 and individually mesh with the respective second counter gears. It comprises gears 39, 39, 39. The rotating gear 35 meshes with the internal gear fixed gear 40 fixed to the fixed support 20, and performs the above operation in conjunction with the rotation of the rotating body 21. The second counter gear 38 and the final gear 39 are non-circular gears (unequal-diameter gears).
[0025]
When the rotating body 21 rotates, the three seedling attachments 26, 26, 26 move in a circular orbit. At this time, the operation of the rotating gear 35 interlocked with the rotation of the rotating body 21 is transmitted to the final shafts 25, 25, 25 via a gear train, and as shown in FIGS. , 26 change. As a result, the seedling attaching tool 26 operates so that the tip of the seedling picking nail 47 described below draws a locus P. The movement trajectory of the tip of the seedling picking nail 47 taking into account the movement of the machine is as shown in FIG. Each tip movement trajectory P '(1-3) is due to a difference in the moving speed of the body, and the moving speed is faster in the order of P' (1), P '(2), P' (3). In the locus P, a process C for moving further backward from the seedling planting position B, which is the bottom dead center, is included. After passing, it moves almost directly above.
[0026]
Further, inside the rotating body 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. The 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 removes seedling removal described later. And it acts so that the operation of planting seedlings is performed accurately.
[0027]
Each 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 picking claw 47 having a sharp tip, and a seedling pushing body 48 that protrudes and retracts below the seedling picking claw. .
[0028]
The operation mechanism of the seedling extruded body 48 is as follows. A cam arm 52 rotatably supported by an arm shaft 51 is in sliding contact with the outer peripheral surface of the pushing cam 50 rotatably fitted to the final shaft 25. The extruding cams 50 of the final shafts 25 are connected to each other by a connecting plate 50a so as not to rotate individually. 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 an extruding spring 56 as an urging body to a side where the pushing rod 54 projects. Since the extruding spring 56 is disposed so as to be shifted left and right with respect to the seedling picking claw 47, the seedling planting tool 26 is compact in the pushing direction of the seedling extruded body 48, and three pieces are provided in the rotating direction of the rotating body 21. Are prevented from interfering with each other.
[0029]
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.
[0030]
At the time of working with the riding rice transplanter 1, as described above, the three seedling planters 26, 26, 26 move on the same orbit while keeping the interval of 1/3 cycle while drawing the tip trajectory P. . At the seedling extraction position A, the seedling picking nail 47 separates and extracts the seedlings at the seedling extraction outlet 16 into one plant. At this time, the seedling extruded body 48 is in a retracted state. When the seedling mounting tool 26 moves downward and moves to the seedling planting position B, the seedling extruded body 48 protrudes, and the soil portion of the seedling held by the seedling picking nail 47 is pressed downward, so that the seedling is picked. It is extruded from the nail 47 and planted in the field. After that, the seedling planting tool 26 moves further rearward, and then moves upward through a trajectory that is more rearward than when moving downward. As shown in the trajectories P '(1 to 3) of FIG. 12, the seedling picking tool 47 moves almost right after passing the seedling planting position B, so that the preceding seedling planting tool 26 is planted. Do not interfere with seedlings. The seedling extruded body 48 moves backward from the seedling placement position B to the seedling removal position A.
[0031]
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 rotating body 21 rotatably supported from the outside by the fixed support 20, and the two rotating bodies are simultaneously formed by one rotating body. In addition to planting seedlings, three studs are provided on each strip to enable high-speed planting. In order to realize the above-mentioned configuration, and to improve the functionality and reduce the cost, the following characteristic structure is adopted in this seedling planting apparatus.
[0032]
First, the fixed support body 20 is divided into two parts by a dividing surface 60, and the rear member 20b is connected to the front member 20a integral with the planting transmission part 12a by connecting bolts 61,. . By dividing the fixed support 20 in this manner, the rear half of the fixed support 20 can be removed, so that the maintenance of the rotating body 21 is easy.
[0033]
Next, the gear train transmitting to the three final shafts includes one first counter gear 37 and three second counter gears 38 on a common counter shaft 62 disposed on the rotation center line 24 of the rotating body 21. , 38, and 38, each second counter gear is meshed with a corresponding final gear 39, 39, and 39, and the power is branched from one counter shaft 62 to three final shafts 25, 25, and 25. Transmission. As a result, an effective gear train can be formed with a small number of gears, so that weight reduction and cost reduction can be achieved. In this case, as in the present embodiment, when the intermediate shaft 63 to which the rotary gear 35 and the intermediate gear 36 are attached is arranged on a straight line passing through one of the three final shafts 25 and the counter shaft 62 in a side view, as in this embodiment. Good.
[0034]
Further, a driving gear 30 is provided at the center of the rotating body 21 on the left and right, a rotating gear 35 and a fixed gear 40 are arranged on one of the left and right sides (right side in the illustrated example), and an intermediate gear 36, a first counter gear 37, Two counter gears 38, 38, 38 and final gears 39, 39, 39 are arranged. The driving gear 30 has an opening at the center, and the counter shaft 62 and the intermediate shaft 63 are 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.
[0035]
As described above, since the final gear 39 is a non-circular gear (unequal diameter gear), the width of the final gear 39 projecting outward with respect to the final shaft 25 differs depending on the rotational position of the rotating body 21. Therefore, in a portion where the maximum outer diameter portion of the final gear 39 is located outside, a part of the final gear 39 is projected outward from the rotating body 21 in a side view, and the outer shape of the fixed support 20 only by the corresponding portion 20a. Is made larger (see FIGS. 6 and 7). Thus, the size of the rotating body 21 can be reduced without increasing the size of the fixed support body 20 more than necessary.
[0036]
When the final gear 39 having such an unequal diameter is adopted, if the maximum outer diameter portion of the final gear 39 is located on the lower side when the final gear 39 is located below the moving path, the final shaft 25 is grounded. And the adjustment range of the seedling planting depth can be widened.
[0037]
Further, as described above, the gear ratio between the input gear 31 and the drive gear 30 is set to “3”, which is the same as the number of the seedling attachments 26, and both gears 30 and 31 are unequal-diameter gears. The drive gear 30 is rotated at an irregular speed so that the rotation speed of the drive gear 30 changes in a 1/3 cycle, but the rotation speed of the drive gear 30 is increased behind the rotation center line 24 of the rotating body 21. Is set when the two seedling attachments 26, 26 are located at the center. In other words, the number of the upwardly moving seedling planting tools (located behind the rotational center line 24 of the rotating body 21) is lower than the number of the downwardly moving seedling planting tools (the rotating center line 24 of the rotating body 21). When the number is larger than the number on the front side, the rotation speed of the rotating body 21 is low, which is effective in stabilizing the rotation of the rotating body 21.
[0038]
By arranging the reduction mechanism by the combination of the input gear 31 and the drive gear 30 immediately before transmission to the rotating body 21, the degree of freedom of arrangement of the stop clutch 33 is increased. A stop clutch 33 can be provided at the rear end of 12a. Further, the stop clutch 33 can be shared by both of the two seedling planting devices provided on the left and right sides of the rotating body 21.
[0039]
When the rotating body 21 is stopped by the stop clutch 33, any one of the seedling attachments 26 is located immediately above or below the rotation center 24 of the rotating body 21 (for example, the position shown in FIG. 3). ). In this manner, the weight balance of the three seedling inoculation tools is equalized in the front-rear direction, so that the operation is reliably stopped and the stop position is stabilized.
[0040]
When the rotating body 21 stops in a state where one seedling planting tool 26 is located immediately above the rotation center line 24 of the rotating body 21 (the state of FIG. 3), a pair of front and rear seedling planting tools on the lower side are provided. Since the heights of the lower ends of 26 and 26 are substantially the same, the distance from the ground to the seedling lowering tool at the lower side when the operation is stopped is properly maintained, and the seedling mounting tool can be prevented from interfering with the ground.
[0041]
When the rotating body 21 is stopped, the seedling planting tool 26 is located on the front side of the rear end of the fixed support 20, so that the seedling planting tool can be prevented from hitting an obstacle behind, which is effective for protecting the seedling planting tool. is there.
[0042]
The characteristic structure described above is about the fixed support body 20 and the rotating body 21 and the gear train accommodated therein, and includes the seedling attachment 26 on the lower side of the transmission. Since there is no seedling, the present invention is not limited to the seedling planting apparatus, but can be applied to a seedling removal apparatus that performs only 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 a side view of the seedling planting apparatus, a part of which is shown in a cross section.
FIG. 4 is an exploded sectional view 1 of the seedling planting apparatus.
FIG. 5 is an exploded sectional view 2 of the seedling 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 first diagram showing a relationship between a state of a gear train and a state of a seedling plant.
FIG. 9 is a second diagram illustrating the relationship between the state of the gear train and the state of the seedling attachment.
FIG. 10 is a third diagram showing the relationship between the state of the gear train and the state of the seedling plant.
FIG. 11 is a fourth diagram illustrating the relationship between the state of the gear train and the state of the seedling attachment.
FIG. 12 is a diagram showing a movement trajectory of a tip of a seedling attachment in consideration of movement of a body.
[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 Rotating body 24 Rotation center line 25 Final shaft 26 Seedling planting tool 30 Drive gear 31 Input gear 33 Stop clutch 35 Rotating gear 36 Intermediate gear 37 First counter gear 38 Second counter gear 39 Final gear 40 Fixed gear 47 Seedling claw 48 Seedling extruded body 50 Extrusion cam 56 Extrusion spring (biasing body)

Claims (7)

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する苗植付装置。A left-right final axis eccentric to the rotation center line is rotatably provided on a rotating body that rotates around the left-right rotation center line, and a seedling attachment is provided at 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、最終ギヤを複数設け、共通のカウンタ軸に取り付けた複数の第二カウンタギヤから各最終ギヤへ伝動するように構成した請求項1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 second counter gear that rotates integrally with the first counter gear and meshes with the last gear. A plurality of final gears are provided, and transmission is performed from the plurality of second counter gears attached to a common counter shaft to each final gear. The seedling planting apparatus according to claim 1. 第二カウンタギヤを回転体の回転中心線上に設けた請求項2に記載の苗植付装置。3. The seedling planting apparatus according to claim 2, wherein the second counter gear is provided on a rotation center line of the rotating body. 側面視で最終ギヤの一部が回転体よりも外側に突出している請求項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 a part of the final gear projects outside the rotating body in a side view. 第二カウンタギヤ及び最終ギヤが不等径ギヤであり、最終ギヤが回転体の回転による移動経路の下位に位置するとき当該最終ギヤの最大外径部が上側になる請求項2乃至4のいずれかに記載の苗植付装置。The maximum outer diameter portion of the final gear is located on the upper side when the second counter gear and the final gear are unequal diameter gears, and the final gear is located at a lower position in a movement path by rotation of the rotating body. Crab seedling planting apparatus. 苗植付具の移動軌跡は全体的には上下方向に長い環状で、かつ苗植付具が下死点からさらに後方へ移動する行程を含む形状である請求項1乃至5のいずれかに記載の苗植付装置。The moving trajectory of the seedling-planting tool is generally annular in a vertically long direction, and has a shape including a process of moving the seedling-planting tool further backward from the bottom dead center. Seedling planting equipment. 苗植付具は、苗載台の苗を取り出す苗取り爪と、該苗取り爪に保持されている苗を押し出して圃場に植付ける苗押出体とを備え、該苗押出体の作動機構を、苗押出体を押し出し方向に付勢する付勢体と、苗押出体の押し出し方向への移動を規制するカム機構とを組み合わせて構成し、前記付勢体を前記苗取り爪に対し左右にずらせて配置した請求項1乃至6のいずれかに記載の苗植付装置。The seedling attaching tool includes a seedling picking nail for taking out seedlings from a seedling mounting table, and a seedling pushing body that pushes out the seedlings held by the seedling holding nails and implants the seedlings in a field. An urging body that urges the seedling extruded body in the pushing direction and a cam mechanism that regulates the movement of the seedling extruded body in the pushing direction are configured in combination, and the urging body is moved right and left with respect to the seedling removing claw. The seedling planting device according to any one of claims 1 to 6, wherein the planting device is shifted.
JP2003093602A 2003-01-31 2003-03-31 Seedling planting equipment Expired - Fee Related JP4396121B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2003093602A JP4396121B2 (en) 2003-03-31 2003-03-31 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

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003093602A JP4396121B2 (en) 2003-03-31 2003-03-31 Seedling planting equipment

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JP2004298045A true JP2004298045A (en) 2004-10-28
JP2004298045A5 JP2004298045A5 (en) 2008-12-18
JP4396121B2 JP4396121B2 (en) 2010-01-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007089481A (en) * 2005-09-29 2007-04-12 Iseki & Co Ltd Seedling-transplanting device for seedling transplanter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007089481A (en) * 2005-09-29 2007-04-12 Iseki & Co Ltd Seedling-transplanting device for seedling transplanter

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