JP4396104B2

JP4396104B2 - Seedling planting equipment

Info

Publication number: JP4396104B2
Application number: JP2003024403A
Authority: JP
Inventors: 塩崎　　孝秀
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2003-01-31
Filing date: 2003-01-31
Publication date: 2010-01-13
Anticipated expiration: 2023-01-31
Also published as: JP2004229593A

Description

【０００１】
【発明の属する技術分野】
この発明は、苗植付具により苗を保持した状態で圃場面に移送して植え付ける苗植付装置の技術分野に属する。
【０００２】
【従来の技術】
従来、田植機等の苗移植機において、伝動ケースから突出する左右方向の駆動軸の駆動回転により、該駆動軸と一体回転する回転体の回転中心から偏位した位置に伝達軸を設け、該伝達軸の駆動が伝達されるように苗植付具を回転体に取り付けた構成の苗植付装置が設けられている。この苗植付装置は、回転体の回転により苗植付具を上下往復移動させ、苗植付具により、苗載置台上の例えばマット状の苗から一株分の苗を掻き取って保持して圃場面まで移送し、苗を圃場に植え付ける構成となっている。前記伝達軸は、回転体を構成する回転ケース内の複数のギヤからなる伝達機構により、回転体の回転に連動して回転体に対して該回転体の回転方向と逆方向に回転する構成となっている。この伝達軸に苗植付具を取り付けて、伝達軸により苗植付具の姿勢が制御されるようになっている。
【０００３】
そして、苗植付装置は、各植付条毎に回転体が設けられ、この回転体の左右一側にのみ苗植付具を取り付けた構成となっている（例えば、特許文献１参照）。
【０００４】
【特許文献１】
特開２００１−２６９０２３号公報
【０００５】
【発明が解決しようとする課題】
上記従来の苗植付装置は、各植付条毎に回転体が設けられているので、複数条植えの苗移植機において、回転体の個数が多くなり、また回転体の個数に付随して伝達軸への伝達機構等を含む部品点数が多くなり、重量が大きくなり、コストアップの要因となる。
【０００６】
また、回転体の左右一側に伝達軸を延ばして、この伝達軸に複数の苗植付具を取り付けて左右に並べ、単一の回転体により複数条分の苗植付具を作動させることが考えられるが、植付条間にわたるべく伝達軸が左右に長くなる分、苗植付具の作動が不安定になったり、伝達軸が周囲の構造物と干渉しないようにするために他の構造物の配置等の設計の自由度が低下したり、コストアップを招くおそれがある。
【０００７】
【課題を解決するための手段】
この発明は、上記の課題を解決するために、次の技術的手段を講じた。
すなわち、請求項１に係る発明は、左右方向の軸心回りに回転する回転体（３１）の回転中心から偏位した位置に伝達軸（３６）を支持して設け、該伝達軸（３６）の左右に苗植付具（３２）を取り付け、回転体（３１）の外周を受けて該回転体（３１）を回転可能に支持する支持部（６３）を設け、機体側に入力ギヤ（６０）を設け、該入力ギヤ（６０）と噛み合う駆動ギヤ（６１）を設け、回転体（３１）が駆動ギヤ（６１）と一体回転する構成とし、支持部（６３）には内歯の固定ギヤ（６５）を固着し、該固定ギヤ（６５）と噛み合う回転ギヤ（６７）を設け、回転体（３１）の回転に伴って回転ギヤ（６７）が公転しながら自転し、該回転ギヤ（６７）から伝達軸（３６）へ伝動する構成とし、回転体（３１）と支持部（６３）とを一体で機体に対して着脱可能に設けたことを特徴とする苗植付装置とした。
【０００８】
従って、請求項１に記載の苗植付装置は、回転体（３１）の左右方向の軸心回りの回転により、回転体（３１）の回転中心から偏位した位置に伝達軸（３６）で左右の苗植付具（３２）の姿勢が制御されながら該苗植付具（３２）が上下往復移動し、圃場に複数条に苗を植え付けていく。そして、支持部（６３）により回転体（３１）の外周を受ける構成としたので、左右の苗植付具（３２）が回転体の駆動軸や該駆動軸への伝動部等に干渉しないように構成でき、ひいては回転体（３１）の小型化が図れる。また、機体に対して回転体（３１）と支持部（６３）とを一体で着脱することができるので、修理や調整等のメンテナンスを容易に行える。
【０００９】
また、請求項２に係る発明は、左右方向の軸心回りに回転する回転体（３１）の回転中心から偏位した位置に伝達軸（３６）を支持して設け、該伝達軸（３６）の左右に苗植付具（３２）を取り付け、回転体（３１）の外周を受けて該回転体（３１）を回転可能に支持する支持部（６３）を設け、回転体（３１）の外周を支持部（６３）により覆うと共に、側面視で回転体（３１）を支持部（６３）と重複しない位置に設けたことを特徴とする苗植付装置とした。
【００１０】
従って、請求項２に記載の苗植付装置は、回転体（３１）の左右方向の軸心回りの回転により、回転体（３１）の回転中心から偏位した位置に伝達軸（３６）で左右の苗植付具（３２）の姿勢が制御されながら該苗植付具（３２）が上下往復移動し、圃場に複数条に苗を植え付けていく。そして、支持部（６３）により回転体（３１）の外周を受ける構成としたので、左右の苗植付具（３２）が回転体の駆動軸や該駆動軸への伝動部等に干渉しないように構成でき、ひいては回転体（３１）の小型化が図れる。また、側方から回転体（３１）を取り外したり回転体（３１）へのメンテナンスを行うとき、支持部（６３）が邪魔にならずに容易に行える。しかも、回転体（３１）の外周を支持部（６３）により覆うので、回転体（３１）の回転により該回転体（３１）に圃場の泥や水等がかかるのを防止でき、回転体（３１）が作業者や他の構造物に接触しにくく、安全性の向上が図れると共に、回転体（３１）が破損するようなことを防止できる。
【００１１】
また、請求項３に係る発明は、左右方向の軸心回りに回転する回転体（３１）の回転中心から偏位した位置に伝達軸（３６）を支持して設け、該伝達軸（３６）の左右に苗植付具（３２）を取り付け、回転体（３１）の外周を受けて該回転体（３１）を回転可能に支持する支持部（６３）を設け、機体側に入力ギヤ（６０）を設け、該入力ギヤ（６０）と噛み合う駆動ギヤ（６１）を設け、回転体（３１）が駆動ギヤ（６１）と一体回転する構成とし、駆動ギヤ（６１）に孔（６１ｂ）を設け、伝達軸（３６）が孔（６１ｂ）を貫通する構成としたことを特徴とする苗植付装置とした。
【００１２】
従って、請求項３に記載の苗植付装置は、回転体（３１）の左右方向の軸心回りの回転により、回転体（３１）の回転中心から偏位した位置に伝達軸（３６）で左右の苗植付具（３２）の姿勢が制御されながら該苗植付具（３２）が上下往復移動し、圃場に複数条に苗を植え付けていく。そして、支持部（６３）により回転体（３１）の外周を受ける構成としたので、左右の苗植付具（３２）が回転体の駆動軸や該駆動軸への伝動部等に干渉しないように構成でき、ひいては回転体（３１）の小型化が図れる。また、駆動ギヤ（６１）に孔（６１ｂ）を設け、伝達軸（３６）が孔（６１ｂ）を貫通する構成とし、小型化、軽量化又はコストダウンを図ることができる。
【００１３】
また、請求項４に係る発明は、左右方向の軸心回りに回転する回転体（３１）の回転中心から偏位した位置に伝達軸（３６）を支持して設け、該伝達軸（３６）の左右に苗植付具（３２）を取り付け、回転体（３１）の外周を受けて該回転体（３１）を回転可能に支持する支持部（６３）を設け、機体側に入力ギヤ（６０）を設け、該入力ギヤ（６０）と噛み合う駆動ギヤ（６１）を設け、回転体（３１）が駆動ギヤ（６１）と一体回転する構成とし、駆動ギヤ（６１）に孔（６１ａ，６１ｃ）を設け、回転体（３１）を左右のケース体（３１ａ）により構成し、該左右のケース体（３１ａ）を結合する結合部材（６８，７９）を設け、結合部材（６８，７９）が孔（６１ａ，６１ｃ）を貫通する構成としたことを特徴とする苗植付装置とした。
【００１４】
従って、請求項４に記載の苗植付装置は、回転体（３１）の左右方向の軸心回りの回転により、回転体（３１）の回転中心から偏位した位置に伝達軸（３６）で左右の苗植付具（３２）の姿勢が制御されながら該苗植付具（３２）が上下往復移動し、圃場に複数条に苗を植え付けていく。そして、支持部（６３）により回転体（３１）の外周を受ける構成としたので、左右の苗植付具（３２）が回転体の駆動軸や該駆動軸への伝動部等に干渉しないように構成でき、ひいては回転体（３１）の小型化が図れる。また、左右のケース体（３１ａ）を結合する結合部材（６８，７９）を設け、結合部材（６８，７９）が駆動ギヤ（６１）の孔（６１ａ，６１ｃ）を貫通する構成とし、小型化、軽量化又はコストダウンを図ることができる。
【００１５】
また、請求項５に係る発明は、左右方向の軸心回りに回転する回転体（３１）の回転中心から偏位した位置に伝達軸（３６）を支持して設け、該伝達軸（３６）の左右に苗植付具（３２）を取り付け、回転体（３１）の外周を受けて該回転体（３１）を回転可能に支持する支持部（６３）を設け、回転体（３１）が駆動ギヤ（６１）と一体回転する構成とし、支持部（６３）には内歯の固定ギヤ（６５）を固着し、該固定ギヤ（６５）と噛み合う回転ギヤ（６７）を設け、回転体（３１）の回転に伴って回転ギヤ（６７）が公転しながら自転し、該回転ギヤ（６７）と一体回転する中間ギヤ（６９）を設け、該中間ギヤ（６９）から伝達軸（３６）へ伝動する構成とし、中間ギヤ（６９）を駆動ギヤ（６１）の回転ギヤ（６７）とは反対側に位置させたことを特徴とする苗植付装置とした。
【００１６】
従って、請求項５に記載の苗植付装置は、回転体（３１）の左右方向の軸心回りの回転により、回転体（３１）の回転中心から偏位した位置に伝達軸（３６）で左右の苗植付具（３２）の姿勢が制御されながら該苗植付具（３２）が上下往復移動し、圃場に複数条に苗を植え付けていく。そして、支持部（６３）により回転体（３１）の外周を受ける構成としたので、左右の苗植付具（３２）が回転体の駆動軸や該駆動軸への伝動部等に干渉しないように構成でき、ひいては回転体（３１）の小型化が図れる。また、中間ギヤ（６９）を駆動ギヤ（６１）の回転ギヤとは反対側に位置させ、小型化、軽量化又はコストダウンを図ることができる。
【００１７】
【発明の効果】
請求項１乃至５に記載の苗植付装置によると、回転体（３１）の左右に取り付けた苗植付具（３２）により圃場に複数条に苗を植え付けることができ、部品点数が少なくなって軽量化、コストダウンを図ることができる。また、伝達軸（３６）により左右の苗植付具（３２）の姿勢が制御されるので、苗植付姿勢の適正化を図ることができる。しかも、左右の苗植付具（３２）が回転体の駆動軸や該駆動軸への伝動部等に干渉しないように構成でき、ひいては回転体（３１）の小型化が図れる。
【００１８】
更に、請求項１に記載の苗植付装置によると、機体に対して回転体（３１）と支持部（６３）とを一体で着脱することができるので、修理や調整等のメンテナンスを容易に行える。
【００１９】
また、請求項２に記載の苗植付装置によると、側方から回転体（３１）を取り外したり回転体（３１）へのメンテナンスを行うとき、支持部（６３）が邪魔にならずに容易に行える。しかも、回転体（３１）の回転により該回転体（３１）に圃場の泥や水等がかかるのを防止でき、回転体（３１）が作業者や他の構造物に接触しにくく、安全性の向上が図れると共に、回転体（３１）が破損するようなことを防止できる。
【００２０】
また、請求項３乃至５に記載の苗植付装置によると、小型化、軽量化又はコストダウンを図ることができる。
【００２１】
【発明の実施の形態】
この発明の実施の一形態を図面に基づき説明する。
図１及び図２は、乗用型の田植機１を示すものであり、この乗用型の田植機１は、走行車体２と６条植えの苗植付部３とから構成される。
【００２２】
走行車体２の略中央に駆動源であるエンジン４が備えられ、該エンジン４の駆動により走行ミッションケ−ス５等を介して前輪６，６及び後輪７，７が駆動され、これらの前後輪６，６，７，７が駆動されて走行車体２が走行する。前記エンジン４の上方に操縦席８が備えられ、該操縦席８の前側にステアリングハンドル９が設けられている。この走行車体２の後部に昇降リンク機構１０が設けられ、該昇降リンク機構１０を介して前記苗植付部３が装着され、油圧昇降シリンダ１１の伸縮により上下に昇降するように設けられている。尚、走行車体側からの動力が植付クラッチケ−ス１２を介して前記苗植付部３に伝動されるようになっている。
【００２３】
また、操縦席前側のステップ部には有段操作される株間変速レバ−１３が設けられており、走行車体２の走行速度に対する苗植付部３の作動速度を変速できるようになっている。この株間変速レバ−１３により、植付作業者が圃場に移植する苗の植付株間を設定できるようになっている。従って、前記株間変速レバ−１３を操作しない限り、走行速度に比例した速度で前記苗植付部３が作動されるようになっている。
【００２４】
苗植付部３は、苗載置台２０と植付伝動部２１及び各２条毎の苗植付装置２２，…とを備えて構成される。苗植付部３の下部には、センタ−フロ−ト２３及び両側部にサイドフロ−ト２４，２４が設けられており、該フロ−ト２３，２４，２４が圃場面を滑走する構成である。
【００２５】
また、苗植付部３は、植付伝動部２１からの動力により前記苗植付装置２２を作動する。前記苗載置台２０は、上部を苗載置台支持ロ−ラ２５，２５、下部を左右移動ガイド板２６により左右移動可能に支持されている。そして、苗植付部３は、植付伝動部２１からの動力により苗載置台２０が固着された苗載置台左右移動棒２７を左右移動させて苗載置台２０を左右移動させ、マット状の苗を苗植付装置２２により一株づつ掻き取る構成となっている。尚、前記左右移動ガイド板２６には、苗植付装置２２，…の苗掻き取り口２６ａ，…が設けられている。また、前記苗載置台２０は、左右移動終端においてマット状の苗を各条の苗送りベルト２８，…により苗載置台２０に沿って苗植付装置側に順次移送する公知の構成である。
【００２６】
苗植付装置２２は、植付伝動部２１の植付伝動フレ−ム２９の後端部で機体の走行速度に比例して一定速度で回動する苗植付装置駆動軸３０の駆動により作動するようになっている。尚、前記苗植付装置駆動軸３０は、前側から巻きかけたチェ−ン３７からの伝動により駆動する従動スプロケット３８と安全クラッチ３９とを介して伝動されて駆動する。前記安全クラッチ３９は、該従動スプロケット３８の端部に一体で設けた駆動クラッチ爪３９ａ、該駆動クラッチ爪３９ａと噛み合う受動クラッチ爪を備える受動クラッチ爪体３９ｂ及び前記従動スプロケット３８を前記受動クラッチ爪体３９ｂ側へ付勢する圧縮スプリング３９ｃを備えて構成される。尚、前記従動スプロケット３８すなわち前記駆動クラッチ爪３９ａは苗植付装置駆動軸３０回りに回転するように設けられ、前記受動クラッチ爪体３９ｂは前記苗植付装置駆動軸３０と一体回転するようになっている。前記駆動クラッチ３９ａ爪及び受動クラッチ爪体３９ｂの爪部は傾斜面を備えており、苗植付装置２２が異物等に干渉してメカロックを起こすと、前記傾斜面により圧縮スプリング３９ｃに抗して駆動クラッチ爪３９ａすなわち従動スプロケット３８が受動クラッチ爪体３９ｂとは反対側に移動して、安全クラッチ３９の伝動を断つようになっている。
【００２７】
そして、前記受動クラッチ爪体３９ｂと一体回転する入力ギヤ６０が設けられ、該入力ギヤ６０の後側で噛み合う駆動ギヤ６１へ伝動され、苗植付装置２２の回転ケ−ス３１が駆動ギヤ６１と一体回転する構成となっている。尚、該駆動ギヤ６１は、左右方向において回転ケ−ス３１及び該回転ケ−ス３１に装着した左右の苗植付具３２間の略中央位置に設けられている。尚、入力ギヤ６０又は駆動ギヤ６１が、回転ケース３１へ回転動力を入力する入力部となる。
【００２８】
苗植付装置２２は、前記回転ケ−ス３１と該回転ケ−ス３１の左右それぞれに装着した一対の苗植付具３２とを備えて構成され、該苗植付具３２が前記苗掻き取り口２６ａ上の苗を掻き取り、掻き取った苗を圃場に植え付けていくようになっている。前記回転ケ−ス３１は、植付伝動フレ−ム２９の後端に上下左右計４本の締付ボルト６２で固着された支持部となる回転支持ケース６３に左右の回転ケ−ス軸受（ベアリング）６４を介して回転可能に支持され、外周が回転支持ケース６３に覆われている。従って、回転支持ケース６３は、回転ケ−ス３１の回転により該ケ−ス３１に圃場の泥や水等がかかるのを防止するガード体となっている。更には、回転ケ−ス３１が作業者や他の構造物に接触しにくく、安全性の向上を図ると共に、回転ケ−ス３１が破損するようなことを防止している。また、前記４本の締付ボルト６２を外すことにより、回転ケ−ス３１ごと回転支持ケース６３を植付伝動フレ−ム２９から取り外すことができる。回転支持ケース６３内には、前記左右の軸受６４の間に位置する内歯の固定ギヤ６５が４か所の締付ボルト６６で固着されている。この固定ギヤ６５と噛み合う回転ギヤ６７が、回転ケ−ス３１内に設けた左右方向の回転ギヤ軸６８回りに回転するように駆動ギヤ６１の右側に設けられている。尚、前記回転ギヤ軸６８は、回転ケ−ス３１の回転中心に対して偏位して設けられている。従って、回転ケ−ス３１の回転に伴って回転ギヤ６７が固定ギヤ６５に沿って公転しながら自転し、これらの回転ギヤ６７、固定ギヤ６５及び回転ケ−ス３１等により遊星ギヤ機構を構成している。また、駆動ギヤ６１の左側には回転ギヤ６７と一体回転する中間ギヤ６９が設けられ、該中間ギヤ６９と噛み合う複数個（２個）の遊星駆動ギヤ７０が、回転ケ−ス３１内に設けたそれぞれの左右方向の遊星駆動ギヤ軸７１回りに回転するように設けられている。そして、遊星駆動ギヤ７０と一体回転する第一偏心ギヤ７２がそれぞれ最終ギヤとなる第二偏心ギヤ７３と噛み合う。尚、前記遊星駆動ギヤ７０及び第一偏心ギヤ７２により、カウンタギヤを構成している。この一対の第二偏心ギヤ７３は、回転ケ−ス３１内に設けたそれぞれの左右方向の最終回動軸３６と一体回転するように設けられている。尚、前記第一偏心ギヤ７２及び第二偏心ギヤ７３は、偏心しているばかりでなく外形が不規則な非円形に構成されており、回転角速度を変化させながら最終回動軸３６へ伝動する。また、一対の前記遊星駆動ギヤ７０、第一偏心ギヤ７２、第二偏心ギヤ７３、遊星駆動ギヤ軸７１及び最終回動軸３６は、それぞれ回転ケ−ス３１の回転中心に対して互いに対称な位置に配置されていると共に、回転ケ−ス３１の回転により公転しながら自転する遊星ギヤとなっている。
【００２９】
ところで、固定ギヤ６５から回転ギヤ６７への回転伝達比（すなわち、回転ケ−ス３１の回転に対する回転ギヤ６７の回転数の比）と中間ギヤ６９から遊星駆動ギヤ７０への回転伝達比とが互いに逆数の関係にあり、固定ギヤ６５から遊星駆動ギヤ７０への回転伝達比が１となるため、回転ケ−ス３１の１回転につき遊星駆動ギヤ７０が同じ方向へ１回転する構成となっている。また、第一偏心ギヤ７２と第二偏心ギヤ７３とは同じ歯数で回転伝達比が１であり、回転ケ−ス３１の１回転につき最終回動軸３６が回動角速度を変えながらそれぞれ逆方向に１回転する。
【００３０】
最終回動軸３６は、それぞれ左右の最終回動軸軸受（ベアリング）７４により回転ケ−ス３１に対して回転可能に両持ち支持されている。そして、最終回動軸３６の両端の方形軸部が苗植付具３２の苗植付具固定部材３２ｃの方形穴部に嵌合しており、前記最終回動軸３６と前記苗植付具３２を一体回転させ、回転ケ−ス３１の回動位置に対して苗植付具３２の前後傾斜姿勢が決定される。すなわち、左右一対の苗植付具３２が第二偏心ギヤ７３と一体回転するようになっている。従って、回転ケ−ス３１が１回転する間に、苗植付具３２が前後傾斜姿勢を変化させながら回転ケ−ス３１の回動とは逆方向に該回転ケ−ス３１に対して１回転するようになっている。尚、苗植付具３２には苗植付具ケ−ス３２ａを備えており、該苗植付具ケ−ス３２ａを２本の取付ボルト３２ｂにより前記苗植付具固定部材３２ｃに固着している。
【００３１】
また、回転ケ−ス３１内のギヤの噛み合いにおけるバックラッシにより発生するガタを吸収すべく、ガタ止め機構４０を回転ケ−ス３１内に設けている。該ガタ止め機構４０は、駆動ギヤ６１の右側に設けられ、最終回動軸３６と一体回転するガタ止めカム４０ａと該カム４０ａに当接するガタ止めア−ム４０ｂと該ア−ム４０ｂを前記ガタ止めカム４０ａ側に付勢するガタ止めスプリング４０ｃとを備えて構成される。従って、ガタ止めカム４０ａと第二偏心ギヤ７３とを駆動ギヤ６１の左右に振り分けているので、両者４０ａ、７３が左右に離れて配置され、この両者４０ａ、７３が作用する最終回動軸３６の撓みを防止でき、植付精度の向上を図っている。尚、該ガタ止めスプリング４０ｃの両端を一対のガタ止めア−ム４０ｂに連結して、複数個（２個）のガタ止めア−ム４０ｂでガタ止めスプリング４０ｃを共用している。このガタ止め機構４０ｃにより、苗植付装置２２が苗掻き取り口２６ａから苗を掻き取るとき及び掻き取った苗を圃場に植え付けるときに前記バックラッシによる第二偏心ギヤ７３のガタを止めて苗植付具３２の前後傾斜姿勢のガタを抑え、該苗植付具３２により適確に苗を掻き取り適確に圃場に苗を植え付けるようにしている。尚、前記ガタ止めア−ム４０ｂは駆動ギヤ６１に設けた支点軸４０ｄ回りに回動するように設けられ、ガタ止めスプリング４０ｃは駆動ギヤ６１の内部に設けた左右に連通する空洞孔部６１ａのスペ−スに重複して配置されている。
【００３２】
前記苗植付具３２は、マット状の苗を一株分掻き取って保持する植付爪４１と該植付爪４１で分離して保持した苗を圃場面へ向けて押し出す苗押出体の一例である苗押出フォ−ク４２とを備えて構成される。回転ケ−ス３１の回動により苗植付具３２が上下に長いル−プ軌跡Ｔを描いて苗掻き取り口２６ａを通過することにより、取付ボルト４３により苗植付具ケ−ス３２ａに固着された植付爪４１が苗掻き取り口２６ａにある苗を掻き取り保持するようになっている。
【００３３】
苗押出フォ−ク４２は、押出作動により前記苗植付具ケ−ス３２ａに対して摺動する丸軸部４２ａと該丸軸部４２ａの先端に固着された苗押出部４２ｂとを備えて構成される。この苗押出部４２ｂの前端部が植付爪４１が保持した苗の苗床に当接して植付爪４１が保持した苗を押し出すようになっている。
【００３４】
前記苗押出フォ−ク４２の上部すなわち丸軸部４２ａの一部は、苗植付具ケ−ス３２ａ内に挿入されている。前記苗植付具ケ−ス３２ａ内には、前記苗押出フォ−ク４２の上端部に下部支軸４４ａを介して連結された連結リンク４４と、該連結リンク４４に上部支軸４４ｂを介して連結した苗押出ア−ム４５と、苗押出ア−ム４５と一体的に設けたカム側ア−ム４６と、該カム側ア−ム４６と当接する苗押出カム４７とを備えている。尚、前記苗押出ア−ム４５及び前記カム側ア−ム４６は、苗植付具ケ−ス３２ａに取り付けた揺動軸４８回りに一体で揺動するようになっている。尚、前記連結リンク４４は、前記下部支軸４４ａを介して前記苗押出フォ−ク４２に連結されているが、苗押出フォ−ク４２と当接することにより該苗押出フォ−ク４２に対してほとんど回動しないように設けられている。また、前記苗押出カム４７は、回転ケ−ス３１の最終回動軸３６回りに回動可能に設けられると共に、回転ケ−ス３１と一体で該回転ケ−ス３１に対して回動しないように設けられている。従って、回転ケ−ス３１の一回転につき、苗押出カム４７が苗植付具３２に対して一回転する構成となっている。そして、苗植付具３２に対する苗押出カム４７の一回転につき、カム側ア−ム４６を介して苗押出ア−ム４５が１往復分揺動し、苗押出フォ−ク４２が１往復分摺動する構成となっている。尚、苗植付具ケ−ス３２ａにおける苗押出フォ−ク４２が摺動する部分にはゴム製のシ−ル材５０を設けており、該シ−ル材５０により苗押出フォ−ク４２の摺動により苗植付具ケ−ス３２ａ内に供給されたグリス（潤滑剤）が苗植付具ケ−ス３２ａ外へ連れ出されないようにしている。
【００３５】
連結リンク４４の上端部には、圧縮スプリングである苗押出スプリング５１を当接させて設けている。尚、苗押出スプリング５１の他端は、苗植付具ケ−ス３２ａの内面に当接している。また、前記連結リンク４４の上端部には、前記苗押出スプリング５１の下端部が当接するための当接面を構成している。そして、苗押出フォ−ク４２は、前記苗押出スプリング５１により苗の押出作用側へ付勢されており、前記苗押出カム４７により苗の押出作用側への摺動が規制され、カム側ア−ム４６が苗押出カム４７の小径部４７ｂに当接する状態で苗押出スプリング５１により摺動して押出作動するようになっている。尚、苗植付具３２のル−プ軌跡Ｔの下死点Ａの位置にきたとき、前記苗押出フォ−ク４２が押出作動するようになっている。そして、苗植付具３２が前記下死点Ａの位置から上昇して苗掻き取り口２６ａの位置に来るまでに押出作動した苗押出フォーク４２が戻り作動して、植付爪４１が苗を掻き取るまでに苗押出フォーク４２が戻り作動するようになっている。尚、苗押出フォ−ク４２が押出作動したときに苗押出ア−ム４５と当接するクッションゴム５２を苗植付具ケ−ス３２ａ内に設けており、該クッションゴム５２により苗押出スプリング５１による苗押出フォ−ク４２の押出作動の衝撃を緩和する構成となっている。
【００３６】
次に、回転ケ−ス３１について説明する。
回転ケ−ス３１は、左右のケ−ス体３１ａにより構成されている。尚、このケ−ス体３１ａは、左右で同じものを使用して共用部品となっている。左右のケ−ス体３１ａは、左側及び右側から挿入されるそれぞれ２本づつのケ−ス結合用ボルト７５（計４本）により結合される。このケ−ス結合用ボルト７５は、それぞれの最終回動軸３６の近くで該軸３６と略対称位置に配置されており、左右の互いのケ−ス体３１ａあるいは回転ケ−ス３１全体における最終回動軸軸受７４を受ける部分の位置ずれが起こりにくいようにしており、回転ケ−ス３１に対して最終回動軸３６の位置が適正な位置へ精度良く固定されるようにしている。尚、最終回動軸３６及びケ−ス結合用ボルト７５は、その中途部で駆動ギヤ６１に設けたそれぞれに対応する孔６１ｂを貫通し、回転ケ−ス３１に対する駆動ギヤ６１の位置精度を向上させると共に、回転ケ−ス３１及び駆動ギヤ６１に対する最終回動軸３６の位置精度の向上を図っている。
【００３７】
また、図７に基づいて説明すると、左側のケ−ス体３１ａ内部に備える雌ねじ孔部３１ｂに回転ギヤ軸６８の一端（左端）に設けた雄ねじ部６８ａを螺合すると共に、回転ギヤ軸６８の他端（右端）に設けた雄ねじ部６８ｂをケ−ス外へ突出させ、該雄ねじ部６８ｂに締付ナット７６をケ−ス外側から螺合している。従って、回転ギヤ６７及び中間ギヤ６９の回転軸心となる回転ギヤ軸６８は、その両端部を左右のケ−ス体３１ａにより支持固定されると共に、前記ケ−ス結合用ボルト７５と同様に左右のケ−ス体３１ａを結合する結合部材となっている。尚、回転ギヤ軸６８の外周に設けたボス部７７により、回転ギヤ６７及び中間ギヤ６９が一体で構成されている。また、回転ギヤ軸６８及びボス部７７は駆動ギヤ６１内部の空洞孔部６１ａを貫通しており、この空洞孔部６１ａで回転ギヤ６７側（図７では右側）から中間ギヤ６９を通し、該中間ギヤ６９を駆動ギヤ６１の回転ギヤ６７とは反対側（図７では左側）に位置させて回転ギヤ６７及び中間ギヤ６９を装着するようになっている。尚、左右のケ−ス体３１ａが共用部品のため、回転ギヤ軸６８の雄ねじ部６８ｂをケ−ス外へ突出させるための孔３１ｃは他方（図７では左側）のケ−ス体３１ａにも設けられているが、この孔３１ｃにはキャップ７８を挿入して回転ケ−ス３１内の潤滑油が該孔３１ｃから抜け出ないようにしている。
【００３８】
また、回転ケ−ス３１の回転中心に対して回転ギヤ軸６８とは反対側に、左右のケ−ス体３１ａを結合する結合部材となるケ−ス結合軸７９が設けられている。このケ−ス結合軸７９は、その一端（図７では左端）に設けた雄ねじ部７９ａを一方の（図７では左側）のケ−ス体３１ａ内部に備える雌ねじ孔部３１ｄに螺合すると共に、他端（図７では右端）に設けた雄ねじ部７９ｂをケ−ス体３１ａ（図７では右側）に備える軸孔３１ｅからケ−ス外へ突出させ、該雄ねじ部７９ｂに締付ナット８０をケ−ス外側から螺合している。尚、このケ−ス結合軸７９は、駆動ギヤ６１内部に設けた孔６１ｃを貫通しており、回転ケ−ス３１に対する駆動ギヤ６１の位置精度の向上を図っている。
【００３９】
また、回転ケ−ス３１の回転中心に対して前記ケ−ス結合軸７９と対称な位置に、一方（図７では左側）のケ−ス体３１ａ内部に支持され駆動ギヤ６１を固定するための締付用軸８１が設けられている。該締付用軸８１は、駆動ギヤ６１内部に設けた孔６１ｄを貫通し、その一端（図７では左端）に設けた雄ねじ部８１ａをケ−ス体３１ａ（図７では左側）に備える軸孔３１ｅからケ−ス外へ突出させ、該雄ねじ部８１ａに締付ナット８２をケ−ス外側から螺合してケ−ス体３１ａに固着すると共に、他端（図７では右端）に設けた雌ねじ孔部８１ｂに締付ボルト８３を螺合し、一方（図７では左側）のケ−ス体３１ａに駆動ギヤ６１を固着している。更には、遊星駆動ギヤ軸７１も、駆動ギヤ６１内部に設けた孔６１ｅを貫通し、その一端（図７では左端、図６では下端）に設けた雄ねじ部７１ａをケ−ス体３１ａ（図７では左側、図６では下側）内部に備える雌ねじ孔部３１ｆに螺合すると共に、他端（図７では右端、図６では上端）に設けた雄ねじ部７１ｂに締付ナット８４を螺合し、一方（図７では左側、図６では下側）のケ−ス体３１ａに駆動ギヤ６１を固着している。従って、締付用軸８１及び遊星駆動ギヤ軸７１により、一方（図７では左側、図６では下側）のケ−ス体３１ａに駆動ギヤ６１を固着し、該駆動ギヤ６１の位置を確実に固定している。尚、一方（図７では左側、図６では下側）のケ−ス体３１ａに駆動ギヤ６１を固着したので、左右のケ−ス体３１ａを離して回転ケ−ス３１を分割するとき、４本のケ−ス結合用ボルト７５及び締付ナット７６，８０を外すだけで回転ケ−ス３１を分割することができる。
【００４０】
回転ケ−ス３１と回転ケ−ス軸受（ベアリング）６４との間には、図６乃至図８及び図１１に示すような回転体３１と支持部６３との間に介在する介在部材となるブッシュ８５が介在している。このブッシュ８５は、左右のケ−ス体３１ａにそれぞれ対応して設けられ、回転ケ−ス３１の左右外側となる端部の適宜箇所（２か所）に回転ケ−ス３１の回転中心側に折り曲げて構成される突起８５ａを備えている。一方、左右のケ−ス体３１ａには、図１１に示すように、回転ケ−ス３１の左右外側となる端部の前記突起８５ａと対応する位置に溝３１ｇを備えている。従って、回転ケ−ス３１にブッシュ８５を装着すると、前記突起８５ａが前記溝３１ｇに係合して回転ケ−ス３１とブッシュ８５との係合部となり、回転ケ−ス３１に対してブッシュ８５が回転するのを阻止する回り止めとなる。尚、回転ケ−ス軸受（ベアリング）６４の左右外側には、回転ケ−ス３１内の潤滑油が外へ放出されないように、回転ケ−ス３１と回転支持ケース６３との間を塞ぐオイルシ−ル８６が設けられている。
【００４１】
尚、回転ケ−ス３１を受ける前記ブッシュ８５及び最終回動軸軸受７４を受ける苗押出カム４７は、鉄製で強度を持たせてあり、回転ケ−ス３１あるいは最終回動軸３６をしっかりと確実に支持できるようにしている。そして、回転ケ−ス３１や回転支持ケース６３等の他の構造物は、アルミ鋳物で構成され、軽量化が図られている。尚、前記他の構造物を、アルミ鋳物で構成する代わりに樹脂製としてもよい。
【００４２】
また、固定ギヤ６５は、適宜の位置で回転支持ケース６３内部に固着されている。尚、この固定ギヤ６５は、図５に示すように、外周の複数箇所（４か所）に凸部６５ａで構成される係合部を備えており、この凸部６５ａが回転支持ケース６３側に設けた凹部（図示せず）と係合して、回転支持ケース６３に対して回転しないように設けられている。
【００４３】
苗植付具３２の苗植付具ケ−ス３２ａと苗押出カム４７との間には、左右方向で両者のボス部３２ｄ，４７ｃの外面にわたるように伸縮可能なゴム製のブ−ツ８７が設けられている。このブ−ツ８７は、端部が苗押出カム４７の外面に設けたブ−ツ用溝４７ｄに回転しやすいように係合し、苗植付装置２２の作動抵抗になりにくいように装着され、回転ケ−ス３１あるいは苗植付具ケ−ス３２ａ内の潤滑油が外へ洩れ出るのを防止している。尚、苗植付具ケ−ス３２ａのボス部３２ｄ内面と苗押出カム４７の外面との間、及び苗押出カム４７のボス部４７ｃ内面と最終回動軸３６との間には、従来と同様に苗植付具ケ−ス３２ａあるいは回転ケ−ス３１の潤滑油洩れを防ぐためのそれぞれオイルシ−ル８８，８９が設けられている。
【００４４】
また、図３等から判るように、回転支持ケース６３の内部空間内に回転ケ−ス３１が収容され、機体側面視で回転支持ケース６３と回転ケ−ス３１とが重複しないように配置されている。従って、回転ケ−ス３１の左右一側の一対の苗植付具３２を最終回動軸３６から取り外し、苗植付具３２が残る他側へ回転ケ−ス３１をスライドさせて取り外すことができる。尚、苗押出カム４７のボス部４７ｃは、側面視で、回転ケ−ス３１の外周より該ケ−ス３１の回動中心側に位置しているので、回転ケ−ス３１の取り外しの支障にならない。
【００４５】
以上により、この苗植付具３２は、回転ケ−ス３１の回転により、上下方向のル−プ軌跡Ｔで旋回し植付爪４１により苗載置台２０の下部の苗掻き取り口２６ａから一株分の苗を掻き取ってその掻き取った苗を圃場面に移送し、苗押出フォ−ク４２が摺動して圃場に苗を押し出して植え付ける。尚、図１０には、機体の走行を加味した苗植付具３２の動軌跡Ｕを示している。
【００４６】
尚、以上の発明の実施の形態は乗用型の田植機１について記述したが、本発明は乗用型の田植機に限定されるものではない。
【図面の簡単な説明】
【図１】乗用型の田植機を示す側面図
【図２】乗用型の田植機を示す平面図
【図３】苗植付装置を示す側面図
【図４】入力ギヤ及び駆動ギヤを示す側面図
【図５】回転ケ−ス内の一部のギヤを示す側面図
【図６】図５のＳ１−Ｓ１断面における苗植付装置の展開断面図
【図７】図５のＳ２−Ｓ２断面における苗植付装置の断面図
【図８】図４のＳ３−Ｓ３断面における苗植付装置の断面図
【図９】苗植付具を示す側面断面図
【図１０】苗植付具の作動軌跡を示す側面図
【図１１】回転ケ−スのケ−ス体とブッシュとの関係を判り易く示した斜視図
【図１２】苗植付装置の動作を判り易く示した側面図
【図１３】図１２の「１」の状態における回転ケ−ス内のギヤの様子を判り易く示した側面図
【図１４】図１２の「２」の状態における回転ケ−ス内のギヤの様子を判り易く示した側面図
【図１５】図１２の「３」の状態における回転ケ−ス内のギヤの様子を判り易く示した側面図
【図１６】図１２の「４」の状態における回転ケ−ス内のギヤの様子を判り易く示した側面図
【図１７】図１２の「５」の状態における回転ケ−ス内のギヤの様子を判り易く示した側面図
【図１８】図１２の「６」の状態における回転ケ−ス内のギヤの様子を判り易く示した側面図
【符号の説明】
２２…苗植付装置、３１…回転ケ−ス、３１ａ…ケース体、３２…苗植付具、３６…最終回動軸、６０…入力ギヤ、６１…駆動ギヤ、６１ａ…空洞孔部、６１ｂ，６１ｃ…孔、６３…回転支持ケース、６５…固定ギヤ、６７…回転ギヤ、６８…回転ギヤ軸、６９…中間ギヤ、７９…ケース結合軸 [0001]
BACKGROUND OF THE INVENTION
  The present invention belongs to the technical field of a seedling planting device that is transferred to a field scene and planted in a state where the seedling is held by a seedling planting tool.
[0002]
[Prior art]
  Conventionally, in a seedling transplanter such as a rice transplanter, a transmission shaft is provided at a position deviated from the rotation center of a rotating body that rotates integrally with the drive shaft by the drive rotation of the left and right drive shaft protruding from the transmission case, A seedling planting apparatus having a configuration in which a seedling planting tool is attached to a rotating body so that the drive of the transmission shaft is transmitted is provided. This seedling planting device moves the seedling planting tool up and down by rotating the rotating body, and scrapes and holds one seedling from a mat-like seedling on the seedling mounting table by the seedling planting tool. The plant is transferred to the farm scene and seedlings are planted in the farm field. The transmission shaft is configured to rotate in a direction opposite to the rotation direction of the rotating body with respect to the rotating body in conjunction with the rotation of the rotating body by a transmission mechanism including a plurality of gears in a rotating case constituting the rotating body. It has become. A seedling planting tool is attached to the transmission shaft, and the posture of the seedling planting tool is controlled by the transmission shaft.
[0003]
  And the seedling planting apparatus has a configuration in which a rotating body is provided for each planting strip, and a seedling planting tool is attached only to the left and right sides of the rotating body (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
  JP 2001-269023 A
[0005]
[Problems to be solved by the invention]
  In the conventional seedling planting device, since a rotating body is provided for each planting line, in the seedling transplanting machine for multiple-row planting, the number of rotating bodies increases, and the number of rotating bodies is attached. The number of parts including the transmission mechanism to the transmission shaft is increased, the weight is increased, and the cost is increased.
[0006]
  Also, extending the transmission shaft to the left and right sides of the rotating body, attaching a plurality of seedling planting tools to this transmission shaft and arranging them on the left and right, and operating the seedling planting tools for a plurality of strips with a single rotating body However, as the transmission shaft extends from side to side to extend between the planting strips, the operation of the seedling planting tool becomes unstable and other measures are taken to prevent the transmission shaft from interfering with surrounding structures. There is a possibility that the degree of freedom of design such as the arrangement of the structure may be reduced or the cost may be increased.
[0007]
[Means for Solving the Problems]
  In order to solve the above problems, the present invention has taken the following technical means.
  That is, the invention according to claim 1 supports the transmission shaft (36) at a position displaced from the rotation center of the rotating body (31) rotating around the axis in the left-right direction, and the transmission shaft (36). A seedling planting tool (32) is attached to the left and right sides of the body, and a support part (63) for receiving the outer periphery of the rotating body (31) and rotatably supporting the rotating body (31) is provided.An input gear (60) is provided on the machine body side, a drive gear (61) that meshes with the input gear (60) is provided, and the rotating body (31) rotates integrally with the drive gear (61). Is provided with a fixed gear (65) having an internal tooth and a rotating gear (67) meshing with the fixed gear (65). The rotating gear (67) rotates while the rotating body (31) revolves as the rotating body (31) rotates. And the transmission gear (67) is transmitted to the transmission shaft (36),The seedling planting apparatus is characterized in that the rotating body (31) and the support portion (63) are integrally provided to be removable from the machine body.
[0008]
  Therefore, the seedling planting device according to claim 1 is configured so that the transmission shaft (36) is displaced from the rotation center of the rotating body (31) by the rotation of the rotating body (31) around the axial center in the left-right direction. While the postures of the left and right seedling planting tools (32) are controlled, the seedling planting tool (32) reciprocates up and down to plant seedlings in a plurality of rows in the field. And since it was set as the structure which receives the outer periphery of a rotary body (31) by a support part (63), right and left seedling planting tools (32) do not interfere with the drive shaft of a rotary body, the transmission part to this drive shaft, etc. Thus, the rotating body (31) can be reduced in size. Further, since the rotating body (31) and the support portion (63) can be integrally attached to and detached from the machine body, maintenance such as repair and adjustment can be easily performed.
[0009]
  In the invention according to claim 2, the transmission shaft (36) is supported and provided at a position deviated from the rotation center of the rotating body (31) rotating around the axis in the left-right direction, and the transmission shaft (36). A seedling planting tool (32) is attached to the left and right sides of the body, and a support part (63) for receiving the outer periphery of the rotating body (31) and rotatably supporting the rotating body (31) is provided.The outer periphery of the rotating body (31) is covered with the support portion (63),The seedling planting apparatus is characterized in that the rotating body (31) is provided at a position not overlapping with the support portion (63) in a side view.
[0010]
  Therefore, the seedling planting device according to claim 2 is configured such that the transmission shaft (36) is located at a position deviated from the rotation center of the rotating body (31) by the rotation of the rotating body (31) around the axis in the left-right direction. While the postures of the left and right seedling planting tools (32) are controlled, the seedling planting tool (32) reciprocates up and down to plant seedlings in a plurality of rows in the field. And since it was set as the structure which receives the outer periphery of a rotary body (31) by a support part (63), right and left seedling planting tools (32) do not interfere with the drive shaft of a rotary body, the transmission part to this drive shaft, etc. Thus, the rotating body (31) can be reduced in size. Moreover, when removing a rotary body (31) from a side or performing maintenance to a rotary body (31), it can carry out easily, without a support part (63) interfering.Moreover, since the outer periphery of the rotating body (31) is covered by the support portion (63), it is possible to prevent the rotating body (31) from being covered with mud, water, etc. in the field due to the rotation of the rotating body (31). 31) is less likely to come into contact with workers and other structures, and safety can be improved, and the rotating body (31) can be prevented from being damaged.
[0011]
  In the invention according to claim 3, the transmission shaft (36) is supported and provided at a position deviated from the rotation center of the rotating body (31) rotating around the axis in the left-right direction, and the transmission shaft (36). A seedling planting tool (32) is attached to the left and right sides of the body, and a support part (63) for receiving the outer periphery of the rotating body (31) and rotatably supporting the rotating body (31) is provided.An input gear (60) is provided on the machine body side, a drive gear (61) that meshes with the input gear (60) is provided, and the rotating body (31) rotates integrally with the drive gear (61). The drive gear (61) Provided with a hole (61b), and the transmission shaft (36) passes through the hole (61b).ConstitutionWhenIt was set as the seedling planting device characterized by the above.
[0012]
  Therefore, the seedling planting device according to claim 3 is configured such that the transmission shaft (36) is displaced from the rotation center of the rotating body (31) by the rotation of the rotating body (31) around the axial center in the left-right direction. While the postures of the left and right seedling planting tools (32) are controlled, the seedling planting tool (32) reciprocates up and down to plant seedlings in a plurality of rows in the field. And since it was set as the structure which receives the outer periphery of a rotary body (31) by a support part (63), right and left seedling planting tools (32) do not interfere with the drive shaft of a rotary body, the transmission part to this drive shaft, etc. Thus, the rotating body (31) can be reduced in size. Also,The drive gear (61) has a hole (61b), and the transmission shaft (36) passes through the hole (61b)., Weight reduction or cost reduction can be achieved.
[0013]
  In the invention according to claim 4, the transmission shaft (36) is supported and provided at a position deviated from the rotation center of the rotating body (31) rotating about the axis in the left-right direction, and the transmission shaft (36). A seedling planting tool (32) is attached to the left and right sides of the body, and a support part (63) for receiving the outer periphery of the rotating body (31) and rotatably supporting the rotating body (31) is provided.An input gear (60) is provided on the machine body side, a drive gear (61) that meshes with the input gear (60) is provided, and the rotating body (31) rotates integrally with the drive gear (61). The drive gear (61) Are provided with holes (61a, 61c), the rotating body (31) is composed of left and right case bodies (31a), and coupling members (68, 79) for coupling the left and right case bodies (31a) are provided. (68, 79) is configured to pass through the holes (61a, 61c).The seedling planting device was characterized by this.
[0014]
  Therefore, the seedling planting device according to claim 4 is configured such that the transmission shaft (36) is displaced from the rotation center of the rotating body (31) by the rotation of the rotating body (31) around the axial center in the left-right direction. While the postures of the left and right seedling planting tools (32) are controlled, the seedling planting tool (32) reciprocates up and down to plant seedlings in a plurality of rows in the field. And since it was set as the structure which receives the outer periphery of a rotary body (31) by a support part (63), right and left seedling planting tools (32) do not interfere with the drive shaft of a rotary body, the transmission part to this drive shaft, etc. Thus, the rotating body (31) can be reduced in size. Also,A coupling member (68, 79) that couples the left and right case bodies (31a) is provided, and the coupling member (68, 79) passes through the holes (61a, 61c) of the drive gear (61). Or to reduce costsit can.
[0015]
  In the invention according to claim 5, the transmission shaft (36) is supported and provided at a position deviated from the rotation center of the rotating body (31) rotating about the axis in the left-right direction, and the transmission shaft (36). A seedling planting tool (32) is attached to the left and right sides of the rotor, and a support portion (63) for receiving the outer periphery of the rotating body (31) and rotatably supporting the rotating body (31) is provided. The rotating body (31) is driven. It is configured to rotate integrally with the gear (61), and a fixed gear (65) with an internal tooth is fixed to the support portion (63), and a rotating gear (67) that meshes with the fixed gear (65) is provided. ), The rotation gear (67) rotates while revolving, and an intermediate gear (69) that rotates integrally with the rotation gear (67) is provided, and is transmitted from the intermediate gear (69) to the transmission shaft (36). The intermediate gear (69) is placed on the opposite side of the drive gear (61) from the rotating gear (67). It was seedling planting apparatus which is characterized in that by location.
[0016]
  Therefore, the seedling planting device according to claim 5 is configured so that the transmission shaft (36) is displaced from the rotation center of the rotating body (31) by the rotation of the rotating body (31) around the axial center in the left-right direction. While the postures of the left and right seedling planting tools (32) are controlled, the seedling planting tool (32) reciprocates up and down to plant seedlings in a plurality of rows in the field. And since it was set as the structure which receives the outer periphery of a rotary body (31) by a support part (63), right and left seedling planting tools (32) do not interfere with the drive shaft of a rotary body, the transmission part to this drive shaft, etc. Thus, the rotating body (31) can be reduced in size. Further, the intermediate gear (69) is positioned on the opposite side of the drive gear (61) from the rotation gear, so that the size, weight, or cost can be reduced.
[0017]
【The invention's effect】
  Claims 1 to5According to the seedling planting apparatus described in, the seedling planting tool (32) attached to the left and right of the rotating body (31) can plant seedlings in a plurality of strips on the field, reducing the number of parts and reducing the cost. You can go down. In addition, since the postures of the left and right seedling planting tools (32) are controlled by the transmission shaft (36), the seedling planting posture can be optimized. In addition, the right and left seedling planting tool (32) can be configured not to interfere with the drive shaft of the rotating body, the transmission portion to the drive shaft, and the like, and thus the rotating body (31) can be reduced in size.
[0018]
  Furthermore, according to the seedling planting apparatus according to claim 1, since the rotating body (31) and the support portion (63) can be integrally attached to and detached from the machine body, maintenance such as repair and adjustment is facilitated. Yes.
[0019]
  In addition, according to the seedling planting device according to claim 2, when removing the rotating body (31) from the side or performing maintenance on the rotating body (31), the support portion (63) is easy without being obstructed. Can be done.In addition, the rotation of the rotating body (31) can prevent the rotating body (31) from being covered with mud, water, etc. in the field, and the rotating body (31) is less likely to come into contact with an operator or other structures. It is possible to prevent the rotating body (31) from being damaged.
[0020]
  Claim 35According to the seedling planting device described inMiniaturization, Can reduce weight or cost.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
  An embodiment of the present invention will be described with reference to the drawings.
  1 and 2 show a riding-type rice transplanter 1, and this riding-type rice transplanter 1 is composed of a traveling vehicle body 2 and a six-row planting part 3.
[0022]
  An engine 4 as a drive source is provided at the approximate center of the traveling vehicle body 2, and the front wheels 6, 6 and the rear wheels 7, 7 are driven by the driving of the engine 4 through the traveling mission case 5. The traveling vehicle body 2 travels by driving the wheels 6, 6, 7, 7. A cockpit 8 is provided above the engine 4, and a steering handle 9 is provided on the front side of the cockpit 8. An elevating link mechanism 10 is provided at the rear part of the traveling vehicle body 2, and the seedling planting part 3 is mounted via the elevating link mechanism 10, and is provided so as to be moved up and down by expansion and contraction of the hydraulic elevating cylinder 11. . The power from the traveling vehicle body side is transmitted to the seedling planting portion 3 through the planting clutch case 12.
[0023]
  Further, an inter-stock shift lever 13 that is operated stepwise is provided at the step portion in front of the cockpit, so that the operating speed of the seedling planting section 3 with respect to the traveling speed of the traveling vehicle body 2 can be changed. With this inter-strain shift lever 13, the planting operator can set the planting strains of seedlings to be transplanted in the field. Therefore, unless the inter-strain shift lever 13 is operated, the seedling planting unit 3 is operated at a speed proportional to the traveling speed.
[0024]
  The seedling planting unit 3 includes a seedling placing table 20, a planting transmission unit 21, and seedling planting devices 22,. At the lower part of the seedling planting part 3, a center float 23 and side floats 24, 24 are provided on both sides, and the floats 23, 24, 24 are configured to slide in a field scene. .
[0025]
  In addition, the seedling planting unit 3 operates the seedling planting device 22 by the power from the planting transmission unit 21. The seedling mounting table 20 is supported by a seedling mounting table support rollers 25 and 25 at the upper part and a left and right movement guide plate 26 at the lower part so as to be movable left and right. Then, the seedling planting unit 3 moves the seedling mounting table left and right moving rod 27 to which the seedling mounting table 20 is fixed by the power from the planting transmission unit 21 to move left and right to move the seedling mounting table 20 left and right. The seedlings are scraped one by one by the seedling planting device 22. The left and right moving guide plate 26 is provided with seedling scraping openings 26a of the seedling planting devices 22,. The seedling mounting table 20 has a known configuration in which mat-shaped seedlings are sequentially transferred to the seedling planting device side along the seedling mounting table 20 by the seedling feeding belts 28,.
[0026]
  The seedling planting device 22 is operated by driving a seedling planting device drive shaft 30 that rotates at a constant speed in proportion to the traveling speed of the airframe at the rear end portion of the planting transmission frame 29 of the planting transmission unit 21. It is supposed to be. The seedling planting device drive shaft 30 is driven and driven via a driven sprocket 38 and a safety clutch 39 which are driven by transmission from a chain 37 wound from the front side. The safety clutch 39 includes a drive clutch pawl 39a integrally provided at an end of the driven sprocket 38, a passive clutch pawl body 39b having a passive clutch pawl meshing with the drive clutch pawl 39a, and the driven sprocket 38. A compression spring 39c that urges the body 39b is provided. The driven sprocket 38, that is, the drive clutch pawl 39a is provided so as to rotate around the seedling planting device drive shaft 30, and the passive clutch pawl body 39b rotates integrally with the seedling planting device drive shaft 30. It has become. The claw portions of the drive clutch 39a claw and the passive clutch claw body 39b are provided with inclined surfaces, and when the seedling planting device 22 interferes with a foreign object or the like to cause a mechanical lock, the inclined surfaces resist the compression spring 39c. The drive clutch pawl 39a, that is, the driven sprocket 38 moves to the side opposite to the passive clutch pawl body 39b, and the transmission of the safety clutch 39 is cut off.
[0027]
  An input gear 60 that rotates integrally with the passive clutch pawl 39 b is provided and transmitted to the drive gear 61 that meshes with the rear side of the input gear 60, and the rotation case 31 of the seedling planting device 22 is driven by the drive gear 61. And is configured to rotate integrally. The drive gear 61 is provided at a substantially central position between the rotating case 31 and the left and right seedling planting tools 32 attached to the rotating case 31 in the left-right direction. Note that the input gear 60 or the drive gear 61 serves as an input unit for inputting rotational power to the rotary case 31.
[0028]
  The seedling planting device 22 includes a rotating case 31 and a pair of seedling planting tools 32 attached to the left and right sides of the rotating case 31, respectively. The seedling on the outlet 26a is scraped off, and the scraped seedling is planted in the field. The rotary case 31 includes left and right rotary case bearings (on the left and right rotary case bearings (supporting portions fixed to the rear end of the planting transmission frame 29 with four fastening bolts 62). A bearing 64 is rotatably supported, and the outer periphery is covered with a rotation support case 63. Accordingly, the rotation support case 63 serves as a guard body that prevents mud, water, etc. from being applied to the case 31 due to the rotation of the rotation case 31. Furthermore, the rotating case 31 is less likely to come into contact with an operator or another structure, thereby improving safety and preventing the rotating case 31 from being damaged. Further, the rotation support case 63 can be removed from the planting transmission frame 29 together with the rotation case 31 by removing the four tightening bolts 62. Inside the rotation support case 63, fixed gears 65 of internal teeth located between the left and right bearings 64 are fixed by four fastening bolts 66. A rotation gear 67 that meshes with the fixed gear 65 is provided on the right side of the drive gear 61 so as to rotate around a rotation gear shaft 68 in the left-right direction provided in the rotation case 31. The rotating gear shaft 68 is provided so as to be deviated from the rotation center of the rotating case 31. Accordingly, as the rotary case 31 rotates, the rotary gear 67 rotates while revolving along the fixed gear 65, and the planetary gear mechanism is constituted by the rotary gear 67, the fixed gear 65, the rotary case 31, and the like. is doing. Further, an intermediate gear 69 that rotates integrally with the rotation gear 67 is provided on the left side of the drive gear 61, and a plurality (two) of planetary drive gears 70 that mesh with the intermediate gear 69 are provided in the rotation case 31. Further, each of the left and right planetary drive gear shafts 71 is provided to rotate. Then, the first eccentric gear 72 that rotates integrally with the planetary drive gear 70 meshes with the second eccentric gear 73 that is the final gear. The planetary drive gear 70 and the first eccentric gear 72 constitute a counter gear. The pair of second eccentric gears 73 are provided so as to rotate integrally with the respective left and right final turning shafts 36 provided in the rotary case 31. The first eccentric gear 72 and the second eccentric gear 73 are not only eccentric but also have an irregular outer shape, and are transmitted to the final rotation shaft 36 while changing the rotational angular velocity. The pair of planetary drive gears 70, the first eccentric gear 72, the second eccentric gear 73, the planetary drive gear shaft 71 and the final rotation shaft 36 are symmetric with respect to the rotation center of the rotation case 31. The planetary gear is arranged at a position and rotates while revolving by the rotation of the rotary case 31.
[0029]
  Incidentally, the rotation transmission ratio from the fixed gear 65 to the rotation gear 67 (that is, the ratio of the rotation speed of the rotation gear 67 to the rotation of the rotation case 31) and the rotation transmission ratio from the intermediate gear 69 to the planetary drive gear 70 are as follows. Since the rotation transmission ratio from the fixed gear 65 to the planetary drive gear 70 is 1, the planetary drive gear 70 rotates once in the same direction for each rotation of the rotation case 31. Yes. Further, the first eccentric gear 72 and the second eccentric gear 73 have the same number of teeth and a rotation transmission ratio of 1, and the final rotation shaft 36 is reversed while changing the rotation angular velocity for each rotation of the rotation case 31. Make one turn in the direction.
[0030]
  The final rotation shaft 36 is supported by both left and right final rotation shaft bearings (bearings) 74 so as to be rotatable with respect to the rotation case 31. And the square shaft part of the both ends of the final rotation axis | shaft 36 is fitted in the square hole part of the seedling planting fixture fixing member 32c of the seedling planting tool 32, The said final rotation axis | shaft 36 and the said seedling planting tool 32 is rotated integrally, and the front / rear inclination posture of the seedling planting tool 32 is determined with respect to the rotational position of the rotary case 31. That is, the pair of left and right seedling planting tools 32 are configured to rotate integrally with the second eccentric gear 73. Therefore, while the rotation case 31 makes one rotation, the seedling planting tool 32 changes the front / rear inclination posture while rotating the rotation case 31 in the opposite direction to the rotation case 31. It is designed to rotate. The seedling planting tool 32 is provided with a seedling planting tool case 32a, and the seedling planting tool case 32a is fixed to the seedling planting tool fixing member 32c by two mounting bolts 32b. ing.
[0031]
  Further, a rattling stop mechanism 40 is provided in the rotary case 31 in order to absorb backlash generated by backlash in the meshing of the gears in the rotary case 31. The backlash mechanism 40 is provided on the right side of the drive gear 61, and includes a backlash cam 40a that rotates integrally with the final rotation shaft 36, a backlash arm 40b that abuts on the cam 40a, and the arm 40b. A backlash spring 40c that biases the backlash cam 40a is provided. Accordingly, since the backlash cam 40a and the second eccentric gear 73 are distributed to the left and right of the drive gear 61, both 40a and 73 are arranged apart from each other on the left and right, and the final rotation shaft 36 on which both 40a and 73 act. Can be prevented, and the planting accuracy is improved. Note that both ends of the backlash spring 40c are connected to a pair of backlash arm 40b, and a plurality (two) of backlash arm 40b share the backlash spring 40c. By this rattling stop mechanism 40c, when the seedling planting device 22 scrapes off the seedling from the seedling scraping opening 26a and when the scraped seedling is planted in the field, the backlash of the second eccentric gear 73 due to the backlash is stopped to plant the seedling. The backlash of the tool 32 in the back-and-forth inclination posture is suppressed, and the seedling planting tool 32 scrapes off the seedlings properly so that the seedlings are accurately planted in the field. The backlash arm 40b is provided so as to rotate about a fulcrum shaft 40d provided in the drive gear 61, and the backlash spring 40c is provided in a hollow hole portion 61a communicating with the left and right provided in the drive gear 61. It is arranged overlapping with the space.
[0032]
  The seedling planting tool 32 is an example of a planting claw 41 for scraping and holding a mat-like seedling and a seedling extrudate for extruding the seedling separated and held by the planting claw 41 toward a field scene. And a seedling extruding fork 42. The rotation of the rotary case 31 causes the seedling planting tool 32 to draw a long loop trajectory T in the vertical direction and pass through the seedling scraping opening 26a, thereby being secured to the seedling planting case 32a by the mounting bolt 43. The planted claw 41 scrapes and holds the seedling in the seedling scraping opening 26a.
[0033]
  The seedling extrusion fork 42 includes a round shaft portion 42a that slides with respect to the seedling planting case 32a by an extrusion operation, and a seedling extrusion portion 42b that is fixed to the tip of the round shaft portion 42a. Composed. The front end portion of the seedling pushing part 42b is in contact with the seedling bed of the seedling held by the planting claw 41 so as to push out the seedling held by the planting claw 41.
[0034]
  An upper portion of the seedling pushing fork 42, that is, a part of the round shaft portion 42a, is inserted into the seedling planting case 32a. In the seedling planting case 32a, a connection link 44 is connected to the upper end of the seedling push-out fork 42 via a lower support shaft 44a, and an upper support shaft 44b is connected to the connection link 44. The seedling push-out arm 45, the cam-side arm 46 provided integrally with the seedling push-out arm 45, and the seedling push-out cam 47 in contact with the cam-side arm 46. . The seedling push-out arm 45 and the cam side arm 46 swing integrally around a swing shaft 48 attached to the seedling planting case 32a. The connecting link 44 is connected to the seedling extruding fork 42 through the lower support shaft 44a. So that it hardly rotates. The seedling push cam 47 is provided so as to be rotatable around the final rotation shaft 36 of the rotary case 31 and is not integrally rotated with the rotary case 31. It is provided as follows. Therefore, the seedling pushing cam 47 is configured to rotate once relative to the seedling planting tool 32 for each rotation of the rotary case 31. Then, for each rotation of the seedling pushing cam 47 with respect to the seedling planting tool 32, the seedling pushing arm 45 swings by one reciprocation via the cam side arm 46, and the seedling pushing fork 42 takes one reciprocation. It is configured to slide. In addition, a rubber seal material 50 is provided in a portion where the seedling extrusion fork 42 slides in the seedling planting tool case 32 a, and the seedling extrusion fork 42 is provided by the seal material 50. Thus, the grease (lubricant) supplied into the seedling planting case 32a is prevented from being taken out of the seedling planting case 32a.
[0035]
  A seedling extrusion spring 51 that is a compression spring is provided in contact with the upper end portion of the connection link 44. The other end of the seedling pushing spring 51 is in contact with the inner surface of the seedling planting case 32a. Further, the upper end portion of the connection link 44 constitutes a contact surface for the lower end portion of the seedling push spring 51 to contact. The seedling extruding fork 42 is urged toward the seedling extruding action side by the seedling extruding spring 51, and the seedling extruding cam 47 regulates the sliding of the seedling to the extruding action side. The slide 46 is slid by the seedling pushing spring 51 in a state where it is in contact with the small diameter portion 47b of the seedling pushing cam 47, and is pushed out. In addition, when it comes to the position of the bottom dead center A of the loop locus | trajectory T of the seedling planting tool 32, the said seedling pushing fork 42 is pushed out. Then, the seedling pushing fork 42 that has been pushed out by the time the seedling planting tool 32 rises from the position of the bottom dead center A and reaches the position of the seedling scraping opening 26a returns and the planting claws 41 scrape the seedling. The seedling extruding fork 42 returns and operates until it is removed. A cushion rubber 52 that contacts the seedling pushing arm 45 when the seedling pushing fork 42 is pushed out is provided in the seedling planting case 32a. It is configured to mitigate the impact of the pushing operation of the seedling pushing fork 42 due to the above.
[0036]
  Next, the rotation case 31 will be described.
  The rotating case 31 is composed of left and right case bodies 31a. The case body 31a is a common part using the same one on the left and right. The left and right case bodies 31a are coupled by two case coupling bolts 75 (four in total) inserted from the left and right sides. The case coupling bolts 75 are arranged near the final rotation shafts 36 and at substantially symmetrical positions with respect to the shafts 36, and in the left and right case bodies 31 a or the entire rotation case 31. The position where the final rotation shaft bearing 74 is received is not easily displaced, and the position of the final rotation shaft 36 is accurately fixed to an appropriate position with respect to the rotation case 31. The final rotation shaft 36 and the case coupling bolt 75 pass through holes 61b corresponding to the respective positions provided in the drive gear 61 in the middle thereof, thereby improving the positional accuracy of the drive gear 61 with respect to the rotary case 31. At the same time, the positional accuracy of the final rotation shaft 36 with respect to the rotary case 31 and the drive gear 61 is improved.
[0037]
  Referring to FIG. 7, a male screw portion 68a provided at one end (left end) of the rotary gear shaft 68 is screwed into a female screw hole portion 31b provided in the left case body 31a, and the rotary gear shaft 68 is also engaged. A male threaded portion 68b provided at the other end (right end) of the housing is projected out of the case, and a tightening nut 76 is screwed into the male threaded portion 68b from the outside of the case. Accordingly, the rotation gear shaft 68 that is the rotation axis of the rotation gear 67 and the intermediate gear 69 is supported and fixed at both ends by the left and right case bodies 31a, and similarly to the case coupling bolt 75. It is a coupling member that couples the left and right case bodies 31a. A rotating gear 67 and an intermediate gear 69 are integrally formed by a boss portion 77 provided on the outer periphery of the rotating gear shaft 68. Further, the rotation gear shaft 68 and the boss 77 pass through a hollow hole 61a inside the drive gear 61, and the intermediate gear 69 is passed through the hollow hole 61a from the rotation gear 67 side (right side in FIG. 7). The intermediate gear 69 is positioned on the opposite side of the drive gear 61 from the rotation gear 67 (left side in FIG. 7), and the rotation gear 67 and the intermediate gear 69 are mounted. Since the left and right case bodies 31a are common parts, the hole 31c for projecting the male screw portion 68b of the rotary gear shaft 68 to the outside of the case is provided in the other case body 31a (left side in FIG. 7). Although a cap 78 is inserted into the hole 31c, the lubricating oil in the rotating case 31 is prevented from coming out of the hole 31c.
[0038]
  Further, a case coupling shaft 79 serving as a coupling member for coupling the left and right case bodies 31a is provided on the opposite side of the rotation gear shaft 68 from the rotation center of the rotation case 31. The case coupling shaft 79 is threadedly engaged with a female screw hole 31d provided in one case body 31a (left side in FIG. 7) with a male screw portion 79a provided at one end (left end in FIG. 7). The male threaded portion 79b provided at the other end (right end in FIG. 7) is projected out of the case from the shaft hole 31e provided in the case body 31a (right side in FIG. 7), and a tightening nut 80 is provided on the male threaded portion 79b. Are screwed in from the outside of the case. The case coupling shaft 79 passes through a hole 61 c provided in the drive gear 61 to improve the positional accuracy of the drive gear 61 with respect to the rotary case 31.
[0039]
  Further, in order to fix the drive gear 61, which is supported inside one case body 31a (left side in FIG. 7) at a position symmetrical to the case coupling shaft 79 with respect to the rotation center of the rotation case 31. A fastening shaft 81 is provided. The fastening shaft 81 passes through a hole 61d provided in the drive gear 61, and is provided with a male screw portion 81a provided at one end (left end in FIG. 7) of the case body 31a (left side in FIG. 7). Projecting out of the case from the hole 31e, a fastening nut 82 is screwed into the male threaded portion 81a from the outside of the case to be fixed to the case body 31a, and provided at the other end (right end in FIG. 7). The fastening bolt 83 is screwed into the female screw hole 81b, and the drive gear 61 is fixed to one (left side in FIG. 7) case body 31a. Further, the planetary drive gear shaft 71 also passes through a hole 61e provided in the drive gear 61, and a male screw portion 71a provided at one end thereof (the left end in FIG. 7 and the lower end in FIG. 6) is a case body 31a (FIG. 7 is screwed into a female screw hole 31f provided on the inside (the lower side in FIG. 6), and a tightening nut 84 is screwed into a male screw 71b provided at the other end (the right end in FIG. 7 and the upper end in FIG. 6). However, the drive gear 61 is fixed to one case body 31a (left side in FIG. 7, lower side in FIG. 6). Therefore, the driving gear 61 is fixed to one case body 31a (the left side in FIG. 7 and the lower side in FIG. 6) by the tightening shaft 81 and the planetary driving gear shaft 71, and the position of the driving gear 61 is ensured. It is fixed to. Since the drive gear 61 is fixed to one case body 31a (left side in FIG. 7, lower side in FIG. 6), the left and right case bodies 31a are separated to divide the rotary case 31. The rotary case 31 can be divided by simply removing the four case coupling bolts 75 and the fastening nuts 76 and 80.
[0040]
  Between the rotary case 31 and the rotary case bearing (bearing) 64, an interposition member is interposed between the rotary body 31 and the support portion 63 as shown in FIGS. A bush 85 is interposed. The bushes 85 are provided corresponding to the left and right case bodies 31a, respectively, and at the appropriate positions (two locations) on the outer left and right ends of the rotating case 31 on the rotation center side of the rotating case 31. The projection 85a is formed by being bent into a bent shape. On the other hand, as shown in FIG. 11, the left and right case bodies 31a are provided with grooves 31g at positions corresponding to the protrusions 85a at the outer left and right ends of the rotary case 31. Accordingly, when the bush 85 is attached to the rotating case 31, the protrusion 85a engages with the groove 31g to become an engaging portion between the rotating case 31 and the bush 85, and the bushing with respect to the rotating case 31. It becomes a detent that prevents the 85 from rotating. It should be noted that an oil sheath is provided on the left and right outer sides of the rotary case bearing (bearing) 64 so that the lubricating oil in the rotary case 31 is not released to the outside. -A ruling 86 is provided.
[0041]
  The bush 85 for receiving the rotary case 31 and the seedling extrusion cam 47 for receiving the final rotary shaft bearing 74 are made of iron and have strength, and the rotary case 31 or the final rotary shaft 36 is firmly attached. We are sure to support it. Other structures such as the rotation case 31 and the rotation support case 63 are made of an aluminum casting to reduce the weight. The other structure may be made of resin instead of being made of aluminum casting.
[0042]
  The fixed gear 65 is fixed inside the rotation support case 63 at an appropriate position. As shown in FIG. 5, the fixed gear 65 includes engaging portions composed of convex portions 65 a at a plurality of locations (four locations) on the outer periphery, and the convex portions 65 a are provided on the rotation support case 63 side. The rotation support case 63 is provided so as not to rotate by engaging with a recess (not shown) provided on the rotation support case 63.
[0043]
  Between the seedling planting case 32a and the seedling extruding cam 47 of the seedling planting tool 32, a rubber boot 87 that can expand and contract so as to extend over the outer surfaces of both boss portions 32d and 47c in the left-right direction. Is provided. The boots 87 are mounted so that the end portions thereof are engaged with the boot grooves 47d provided on the outer surface of the seedling push cam 47 so as to be easily rotated, and the operation resistance of the seedling planting device 22 is not easily generated. The lubricating oil in the rotary case 31 or the seedling planting case 32a is prevented from leaking outside. In addition, between the inner surface of the boss portion 32d of the seedling planting case 32a and the outer surface of the seedling extrusion cam 47, and between the inner surface of the boss portion 47c of the seedling extrusion cam 47 and the final rotation shaft 36, Similarly, oil seals 88 and 89 are provided for preventing leakage of lubricating oil from the seedling planting case 32a or the rotating case 31, respectively.
[0044]
  Further, as can be seen from FIG. 3 and the like, the rotation case 31 is accommodated in the internal space of the rotation support case 63, and the rotation support case 63 and the rotation case 31 are arranged so as not to overlap in a side view of the body. ing. Therefore, it is possible to remove the pair of seedling planting tools 32 on the left and right sides of the rotary case 31 from the final rotation shaft 36 and slide the rotary case 31 to the other side where the seedling planting tools 32 remain. it can. Since the boss portion 47c of the seedling push cam 47 is located on the rotation center side of the case 31 from the outer periphery of the rotation case 31 in a side view, the removal of the rotation case 31 is hindered. do not become.
[0045]
  As described above, the seedling planting tool 32 is rotated by the rotation of the rotary case 31 and swung along the loop trajectory T in the vertical direction, and is planted by the planting claw 41 from the seedling scraping opening 26a below the seedling mounting table 20. Minute seedlings are scraped off and the scraped seedlings are transferred to the field scene, and the seedling extrusion fork 42 slides to push the seedlings into the field and plant them. In addition, in FIG. 10, the movement locus | trajectory U of the seedling planting tool 32 which considered the driving | running | working of the body is shown.
[0046]
  The embodiment of the present invention has been described with respect to the riding type rice transplanter 1. However, the present invention is not limited to the riding type rice transplanter.
[Brief description of the drawings]
FIG. 1 is a side view showing a riding type rice transplanter.
FIG. 2 is a plan view showing a riding type rice transplanter.
FIG. 3 is a side view showing a seedling planting apparatus.
FIG. 4 is a side view showing an input gear and a drive gear.
FIG. 5 is a side view showing some of the gears in the rotary case.
6 is a developed cross-sectional view of the seedling planting device in the S1-S1 cross section of FIG. 5;
7 is a cross-sectional view of the seedling planting device taken along the S2-S2 cross section of FIG. 5;
8 is a cross-sectional view of the seedling planting device taken along the S3-S3 cross section of FIG.
FIG. 9 is a side sectional view showing a seedling planting tool.
FIG. 10 is a side view showing an operation locus of a seedling planting tool.
FIG. 11 is a perspective view showing the relation between the case body of the rotating case and the bush in an easily understandable manner.
FIG. 12 is a side view showing the operation of the seedling planting device in an easily understandable manner.
FIG. 13 is a side view showing the state of the gear in the rotating case in the state of “1” in FIG.
FIG. 14 is a side view showing the state of the gear in the rotary case in the state of “2” in FIG.
FIG. 15 is a side view showing the state of the gear in the rotary case in the state of “3” in FIG.
16 is a side view showing the state of the gear in the rotary case in the state “4” in FIG. 12 in an easily understandable manner.
FIG. 17 is a side view showing the state of the gear in the rotary case in the state of “5” in FIG.
18 is a side view showing the state of the gear in the rotary case in the state “6” in FIG. 12 in an easily understandable manner.
[Explanation of symbols]
  22 ... Seedling planting device, 31 ... Rotating case,31a ... Case body32 ... Seedling planting tool, 36 ... Final pivot,60 ... input gear, 61 ... drive gear, 61a ... hollow hole, 61b, 61c ... hole,63 ... Rotation support case,65 ... fixed gear, 67 ... rotating gear, 68 ... rotating gear shaft, 69 ... intermediate gear, 79 ... case coupling shaft

Claims

The transmission shaft (36) is supported and provided at a position deviated from the rotation center of the rotating body (31) rotating about the axis in the left-right direction, and the seedling planting tool (32) is provided on the left and right of the transmission shaft (36). A support portion (63) for receiving the outer periphery of the rotating body (31) and rotatably supporting the rotating body (31) , an input gear (60) provided on the machine body side, and the input gear (60) The rotating gear (61) rotates integrally with the driving gear (61), and a fixed gear (65) with internal teeth is fixed to the support portion (63). A rotating gear (67) meshing with (65) is provided, and the rotating gear (67) rotates while revolving as the rotating body (31) rotates, and is transmitted from the rotating gear (67) to the transmission shaft (36). configuration and then, set removably with the support portion rotating body (31) and (63) with respect to the machine body integrally Seedling planting apparatus characterized by a.

The transmission shaft (36) is supported and provided at a position deviated from the rotation center of the rotating body (31) rotating about the axis in the left-right direction, and the seedling planting tool (32) is provided on the left and right of the transmission shaft (36). And providing a support part (63) that receives the outer periphery of the rotating body (31) and rotatably supports the rotating body (31), covers the outer periphery of the rotating body (31) with the support part (63), A seedling planting apparatus, characterized in that the rotating body (31) is provided at a position not overlapping with the support portion (63) in a side view.

The transmission shaft (36) is supported and provided at a position deviated from the rotation center of the rotating body (31) that rotates about the axis in the left-right direction. A support portion (63) for receiving the outer periphery of the rotating body (31) and rotatably supporting the rotating body (31) , an input gear (60) provided on the machine body side, and the input gear (60) A drive gear (61) that meshes with the rotating body (31) rotates integrally with the drive gear (61), the drive gear (61) has a hole (61b), and the transmission shaft (36) has a hole (61b). ) seedling planting apparatus is characterized in that a structure that penetrates the.

The transmission shaft (36) is supported and provided at a position deviated from the rotation center of the rotating body (31) rotating about the axis in the left-right direction, and the seedling planting tool (32) is provided on the left and right of the transmission shaft (36). A support portion (63) for receiving the outer periphery of the rotating body (31) and rotatably supporting the rotating body (31) , an input gear (60) provided on the machine body side, and the input gear (60) The drive gear (61) that meshes with the drive gear (61) is configured to rotate integrally with the drive gear (61). The drive gear (61) is provided with holes (61a, 61c), and the rotary body (31) is left and right. The case member (31a) is provided with a connecting member (68, 79) for connecting the left and right case members (31a), and the connecting member (68, 79) passes through the holes (61a, 61c). A seedling planting device characterized by that.

The transmission shaft (36) is supported and provided at a position deviated from the rotation center of the rotating body (31) that rotates about the axis in the left-right direction. And a support portion (63) for receiving the outer periphery of the rotating body (31) and rotatably supporting the rotating body (31) is provided, and the rotating body (31) rotates integrally with the drive gear (61). A fixed gear (65) with internal teeth is fixed to the support portion (63), and a rotation gear (67) that meshes with the fixed gear (65) is provided. ) Rotates while revolving, and an intermediate gear (69) that rotates integrally with the rotating gear (67) is provided, and the intermediate gear (69) is transmitted from the intermediate gear (69) to the transmission shaft (36). A seedling characterized by being positioned on the opposite side of the drive gear (61) from the rotation gear (67) With equipment.