【０００１】
【発明の属する技術分野】
本発明は、圃場に植生する枝豆等の作物体の地上部を挟持して上昇搬送し作物体を圃場から抜取る収穫機の技術分野に属する。
【０００２】
【従来の技術】
従来、圃場に植生する作物体を後上り傾斜状態に備えた引抜き搬送ベルトで引き抜いて後方に搬送する枝豆等の引抜き収穫機がある。そして、引抜き搬送ベルトを巻きかける搬送始端側のプーリを支持する構成として、搬送ベルトの下方に伝動ケースを備え、搬送始端側プーリを下側から支持する構成が下記の特許文献１に記載されている。
【０００３】
【特許文献１】特開平２００２―１４２５３２号
【０００４】
【発明が解決しようとする課題】
枝豆等のように地上部分の茎葉に最終収穫物がついている作物の場合、根本に近い位置に最終収穫物がついている場合があるため、引き抜き搬送ベルトはできるだけ地面に近い位置で茎葉を挟持することが望ましい。しかしながら、上記特許文献１で記載されているように搬送始端側のプーリを下側から支持するよう構成すると、支持する部材（伝動ケース）の厚みの分、引抜き搬送ベルトが圃場から作物体を引き抜く位置が高い位置になる。そうなると、根本に近い位置についている最終収穫物を引き抜き搬送ベルトが挟んで、最終収穫物を傷めてしまう。
【０００５】
本発明は、枝豆等のように地上部分の茎葉に最終収穫物がついている作物の場合に、作物体を圃場から抜き取る時、あるいは抜き取った作物体を後方に搬送する時に枝豆等の最終収穫物ができるだけ傷めないようにすることを目的とする。
【０００６】
【課題を解決するための手段】
本発明は、上記課題を解決するために、以下のように構成した。
請求項１記載の発明は、圃場Ｅに植生する作物体Ｐを挟持搬送して圃場Ｅから引抜く左右一対の引抜搬送ベルト２２，２２を後上がり傾斜状態に設けた収穫機において、前記引抜搬送ベルト２２，２２を巻き掛ける搬送始端側プーリ２０，２０を、該搬送始端側プーリ２０，２０の上方から片持ち支持する構成としたことを特徴とする収穫機の引抜搬送装置とする。
【０００７】
請求項２記載の発明は、圃場Ｅに植生する作物体Ｐを挟持搬送して圃場Ｅから引抜く左右一対の引抜搬送ベルト２２，２２の少なくとも一方のベルトの外周面下側に周方向連続する突起部２２ａを形成して左右ベルトが対向する箇所においてベルトの外周面上側に空間部Ｋを形成したことを特徴とする収穫機の引抜搬送装置。
【０００８】
請求項３記載の発明は、搬送始端側プーリ２０，２０を上方から片持ち支持すると共に、搬送終端側プーリ１９、１９を下方から片持ち支持することことを特徴とする請求項１記載の収穫機の引抜搬送装置とする。
【０００９】
【作用】
本発明の収穫機の作用について説明すると、引抜搬送装置２の引抜搬送ベルト２２，２２が作物体Ｐの根本部ｒを挟んで引き抜き、上方に搬送していくことで作物体Ｐを圃場から引き抜いていく。そして、引抜搬送ベルト２２，２２の搬送終端側Ｔより搬送した作物体を順次放出していく。
【００１０】
【発明の効果】
請求項１記載の発明では、搬送始端側プーリ２０，２０を上方より片持ち支持するよう構成しているため、引抜搬送ベルト２２，２２で作物体Ｐの根本部ｒを挟む時、より地面に近い位置に引抜搬送ベルト２２，２２を近づけて作物体Ｐの根本部ｒを挟むことができる。従って作物体Ｐの地上部分についている枝豆等の最終収穫物Ｂからより離れた位置で挟むことが可能になり、作物体Ｐの根本部ｒに近い位置でついている枝豆等の最終収穫物Ｂを引抜搬送ベルト２２，２２が挟んで傷つけることが生じにくくなる。
【００１１】
請求項２記載の発明では、を形成した左右一対の引抜搬送ベルト２２，２２の少なくとも一方のベルトの外周面下側に周方向連続する突起部２２ａを形成すると、左右ベルトが対向する箇所において該ベルトの外周面上側に空間部Ｋが形成されるので、作物体Ｐの根本部ｒに近い位置でついている枝豆等の最終収穫物Ｂをベルトが挟持して傷つけることが生じにくくなる。
【００１２】
請求項３記載の発明では、搬送始端側プーリ２０，２０を上方から片持ち支持すると共に、搬送終端側プーリ１９、１９を下方から片持ち支持するよう構成しているため、作物体Ｐを挟んで引抜く時には請求項１で記載したように作物体Ｐの根本部ｒに近い位置でついている枝豆等の最終収穫物Ｂを引抜搬送ベルト２２，２２が挟んで傷つけることが生じにくくなるものでありながら、搬送終端側Ｔでは枝豆等の最終収穫物Ｂが搬送終端側プーリ１９、１９の支持部材に当たって傷つけることが生じにくくなる。
【００１３】
【発明の実施の態様】
本発明の一実施態様として最終収穫物が枝豆である作物体を圃場から抜取って収穫する収穫機を、以下に詳細に説明する。
この収穫機は、図に示すように、走行装置１と、作物体Ｐの収穫作業を行う作業部Ｗとを設けたもので、走行装置１は機体を進行方向ｄに向って走行させ、そして、その走行中に作業部Ｗが作物体Ｐの収穫作業を行っていく。これにより、この収穫機は、機体進行方向ｄにそって並ぶ作物体Ｐを機械的に且つ連続的に収穫していくことになる。
【００１４】
走行装置１の一例として、圃場Ｅに形成された畝Ｕの両側の谷部分Ｖを走行する駆動回転する左右一対の車輪５，５を設けて、機体が自走するよう構成している。この車輪５，５は、機体後部側に配置されたエンジン６から動力が伝動されて駆動回転する。具体的には、エンジン６の動力が、エンジン６の前側に配置されエンジン６に連結するミッションケース７内の変速伝動機構に伝動し、該変速伝動機構を経て、ミッションケース７の左右両側部に固着した車輪伝動ケース８，８内の伝動機構に伝動し、該車輪伝動ケース８，８の下部の左右方向外側方に突出する車軸９，９に伝動して該車軸９，９に取り付けている前記車輪５，５が駆動回転する構成となっている。なお、走行装置１は車輪式に換えてクローラ式に構成することもできる。
【００１５】
また、機体の操縦部として歩行型の操縦ハンドル１０をその左右のグリップ部１１，１１が機体後端に位置するように機体後部に設けている。操縦ハンドル１０のグリップ部１１，１１から前側に延びるハンドルフレーム１２は下方に傾斜して前方に延び基部がミッションケース７に固着している。また、操縦ハンドル１０のグリップ部１１，１１には、操縦者の握り操作により操作されるサイドクラッチレバー１３，１３を左右に設けていて、これにより左右の車輪５，５への伝動を個々に遮断することができ機体の旋回が容易に行える。更に、抜取り搬送装置２への伝動を断接するクラッチの操作を行う操作レバー１４、エンジン６からミッションケース７内の変速伝動機構への伝動を断接するクラッチの操作を行う操作レバー１５を配置した操作部１６を操縦ハンドル１０のグリップ部１１，１１の前側近傍に設けている。
【００１６】
次に、作業部Ｗについて説明する。
作業部Ｗには、作業走行中に作物体Ｐの根本部ｒを挟んで上方に搬送し作物体Ｐを圃場Ｅから抜取る抜取り搬送装置２を設けている。従って、走行装置１によって機体を進行方向ｄに向って走行させ、そして、その走行中に、抜取り搬送装置２が、作物体Ｐの根本部ｒを挟んで上方に搬送し作物体Ｐを圃場Ｅから抜取っていく。これにより、この収穫機は、機体進行方向ｄにそって並ぶ作物体Ｐを機械的に且つ連続的に圃場Ｅから抜取っていくことになり、枝豆等の作物体Ｐを圃場Ｅから抜取るという収穫作業を、従来人力によっていたものと比べ省力化が図れる。なお、ここで根本部ｒとは、作物体Ｐの地表面付近の地上及び地中の幹部と、地中の根部とを指して根本部とよんでいる。
【００１７】
また、作業部Ｗの前部下側左右には、作業部Ｗを圃場Ｅ（畝Ｕの左右の谷部Ｖ，Ｖ）に支持させる支持体（図例では遊転自在な車輪）２７，２７を設けている。この支持体２７，２７を設けたことにより、抜取り搬送装置２が畝Ｕ上に生育する作物体Ｐを挟んで上方に搬送することによって作物体Ｐを畝Ｕから抜取るときに作業部Ｗが下降しようとするのを、この支持体２７，２７で突っ張るようにして作業部Ｗを支持するものとなる。
【００１８】
抜取り搬送装置２の作物体挟持始端部Ｓ、及び支持体２７，２７の前方には、地中にある作物体Ｐの根本部ｒの左右の土を左右外側方に移動させて排出する排土装置３を設けている。従って、この収穫機は、排土装置３が地中にある作物体Ｐの根本部ｒの左右の土を左右支持体２７，２７の外側方に向けて排出し、このようにして左右の土が排出された個所に抜取り搬送装置２の作物体挟持始端部Ｓが進んで行って、地中にあった作物体Ｐの根本部ｒを抜取り搬送装置２が挟んで上方に搬送し作物体Ｐを圃場Ｅから抜取っていく。これにより、作物体Ｐの地面付近にある最終収穫物Ｂを抜取り搬送装置２が挟んで傷つけることが生じにくくなる。また、排土装置３を支持体２７，２７の前方に設けることで、排土装置３で排出した土が支持体２７，２７の前側を経て側方に向って移動するため、支持体２７，２７の内側に滞留することによって支持体２７，２７が前進するのを妨げるのを防止することができる。
【００１９】
排土装置３は、板体で構成し該板体前面の排土面が左右外側ほど機体進行方向後側になる姿勢とした排土板３ａ，３ａを、作物体Ｐの根本部ｒの左右両側方を通過するよう左右に配置して構成している。これにより、排土装置３を簡略に構成でき、排土装置３の小型軽量化・コストダウンが図れる。
【００２０】
更に、排土装置３の前方には、作物体Ｐの根本部ｒの左右の土を左右に分断する分土装置４を設けている。従って、この収穫機は、分土装置４が、作物体Ｐの根本部ｒの左右の土を予め左右に分断し、即ち、作物体Ｐの根本部ｒの左右の土を進行方向ｄに向って切溝を形成し、そして、排土装置３がその左右に分断された土の左右外側の土を左右外側方に移動させて排出するので、土が良好に排出され、作業を良好に進められる。なお、この分土装置４を設けないと、特に硬い土壌や粘性の高い土壌など流動性の低い土壌の場合には、排土装置３による左右外側方への土の移動が円滑に行われにくい。また、そのような場合で、排土装置３を前記のような左右の排土板３ａ，３ａで構成したものであるときには、左右外側方への土の移動が円滑に行われにくく、排土板３ａ，３ａの前面に土が滞留して排土板３ａ，３ａが土を押していくような状態になり排土が良好に行われない場合がある。しかし、このような場合でも、上記のような分土装置４を設けることで、土が左右外側方へ円滑に移動して排土が良好に行えるようになる。
【００２１】
また、分土装置４は、駆動動作される作用体によって機体進行方向ｄに向って土を左右に分断するようにもできるが、ここでは、機体構成の簡略化、軽量小型化、コストダウンという観点から、機体に固定の作用体にて構成する。具体的には平板で構成した分土板４ａ，４ａを設ける。分土板４ａ，４ａは、その板面を機体進行方向ｄと上下方向とに沿う姿勢とし、前記排土装置３の排土作用部３ａ，３ａの左右内端部前方に左右に配置して構成する。この分土板４ａ，４ａが土を分断する分断作用部となる。従って、この収穫機は、分土装置４の左右の分土板４ａ，４ａは、板面が機体進行方向ｄと上下方向とに沿う姿勢で土中に潜り込んで進行し、作物体Ｐの根本部ｒの左右の土を左右に分断する。このため分土板４ａ，４ａの土中直進性が高く、走行中、分土板４ａ，４ａの左右の位置ずれが生じにくい。よって、左右の分土板４ａ，４ａの間から作物体Ｐの根本部ｒが外れることが生じにくく、作業を良好に進められる。
【００２２】
また、分土板４ａ，４ａの後部は、排土装置３の排土作用部３ａ，３ａの左右内端部よりも後方に延設している。これにより、作物体Ｐの根本部ｒは抜取り搬送装置２の作物体挟持始端部Ｓの近くまで左右の分土板４ａ，４ａの間を通過するようになる。従って、作物体Ｐの根本部ｒが分土板４ａ，４ａの間を通り抜けて抜取り搬送装置２の作物体挟持始端部Ｓに到る間に機体が左右にずれて作物体Ｐの根本部ｒが抜取り搬送装置２の作物体挟持始端部Ｓに対し適確に供給されなくなるということも生じにくくなり、作物体Ｐの抜取り作業を更に一層良好に進められる。
【００２３】
分土板４ａ，４ａの後部は、前記排土装置３の排土作用部３ａ，３ａの左右内端部よりも後方に延設している。これにより、作物体Ｐの根本部ｒは抜取り搬送装置２の作物体挟持始端部Ｓの近くまで左右の分土板４ａ，４ａの間を通過するようになる。従って、作物体Ｐの根本部ｒが分土板４ａ，４ａの間を通り抜けて抜取り搬送装置２の作物体挟持始端部Ｓに到る間に機体が左右にずれて作物体Ｐの根本部ｒが抜取り搬送装置２の作物体挟持始端部Ｓに対し適確に供給されなくなるということも生じにくくなり、作物体Ｐの抜取り作業を更に一層良好に進められる。
【００２４】
分土板４ａ，４ａの前部は、前記排土板３ａ，３ａの排土作用部３ａ，３ａの左右方向内端且つ下端部分から垂直前方にのびる線ｘが排土作用部３ａ，３ａの左右方向外端且つ下端部分から機体進行方向ｄにのびる線ｙと機体平面視で交差する点ｚより前方に延設している。これにより、排土板３ａ，３ａの排土面が前進して押し出され左右外側方に移動しようとする土部分に対し、その土部分の左右方向内側部を分土板４ａ，４ａが前後方向において十分に分断しているので、排土が良好に行われ、作物体Ｐの抜取り作業を良好に進められる。
【００２５】
分土装置４の土分断深さは、排土装置３の排土深さに対し略同深さ或は深くなるように設けている。具体的には、分土装置４の分断作用部の下端位置、ここでは分土板４ａ，４ａの下端位置が、上下方向において排土装置３の排土作用部３ａ，３ａの下端位置に対し略同位置、或は、分土板４ａ，４ａの下端位置の方が下側に位置するように設ける。これにより、排土板３ａ，３ａの排土面が前進して押し出され左右外側方に移動しようとする土部分に対し、その土部分の左右方向内側部を分土板４ａ，４ａが上下方向において十分に分断しているので、排土が良好に行われ、作物体Ｐの抜取り作業を良好に進められる。
【００２６】
作業部Ｗ各部の更に具体的な構成を以下に説明する。
作業部Ｗは、機体前部に配置していて、ミッションケース７の前部から斜め前側上方に延びる左右２本の伝動フレーム１７，１７と、ミッションケース７の前部から斜め前側下方に延びる左右２本の支持フレーム１８，１８との各先端部に取り付けている。
【００２７】
抜取り搬送装置２は、搬送終端側プーリ１９，１９と搬送始端側プーリ２０，２０、そしてテンションプーリ２１ａ，２１ａ；２１ａ，２１ａ、作物体挟持始端部Ｓ側に多数の作物体支持ローラ２１ｂ…，２１ｂ…を連続して設け、搬送中間部の泥落し装置駆動ローラ２１ｃ、２１ｃを左右にわたって千鳥状に複数備えている。それら左右それぞれに抜取り搬送装置２の搬送体となる引抜搬送ベルト２２，２２を巻き掛け、搬送終端側プーリ１９，１９の駆動回転により左右の引抜搬送ベルト２２，２２が駆動回転する構成としている。引抜搬送ベルト２２，２２の左右内側のベルト外周面は互いに接触或は近接するように設ける。抜取り搬送装置２の作物体挟持始端部Ｓは、引抜搬送ベルト２２，２２の前端部で左右の搬送ベルト２２，２２が左右中央側でベルト外周面を互いに接触或は近接させ始める個所となり、ここに作物体Ｐの根本部ｒが供給されると、左右の搬送ベルト２２，２２が作物体Ｐの根本部ｒを挟んで上方に搬送し作物体Ｐを圃場Ｅから抜取ることになる。
【００２８】
左右の搬送ベルト２２，２２への伝動構成について説明すると、ミッションケース７と、駆動軸２３，２３を内装する左右伝動フレーム１７，１７と、駆動軸２３，２３の先端側部分に一体回転するよう取り付けた第１中間プーリ２４ａ，２４ａと、搬送終端側プーリ１９，１９の軸１９ａに取付けた第２中間プーリ２４ｂ，２４ｂと、第１中間プーリ２４ａ，２４ａと第２中間プーリ２４ｂ，２４ｂとを巻き掛ける中間ベルト２４ｃと、をそれぞれ備え、これら第１中間プーリ２４ａ，２４ａと第２中間プーリ２４ｂ，２４ｂと中間ベルト２４ｃとは中間ケース２４ｄに内装されており中間伝動部２４を形成している。
【００２９】
そして、動力の伝動について説明すると、ミッションケース７内の動力が駆動軸２３，２３に伝動し、次いで第１中間プーリ２４ａ，２４ａ、中間ベルト２４ｃ、第２中間プーリ２４ｂ，２４ｂを経て搬送終端側プーリ１９，１９が回転する。すると、左右内側のベルト外周面が後方に移動するように左右の引抜搬送ベルト２２，２２が回転し、さらに引抜搬送ベルト２２，２２が回転すると、搬送中間部の泥落し装置駆動ローラ２１ｃ、２１ｃも回転駆動する。
【００３０】
抜取り搬送装置２の取付構成について詳述すると、引抜搬送ベルト２２，２２の周回内であって、且つ略平行に支持部材Ｇ，Ｇを備える。支持部材Ｇ，Ｇはテンションプーリ２１ａ，２１ａ；２１ａ，２１ａ、作物体支持ローラ２１ｂ…，２１ｂ…、泥落し装置駆動ローラ２１ｃ、２１ｃを支持する支持軸２６と、支持軸２６の搬送始端側上面より斜め下方に向かって延設され搬送始端側プーリ２０，２０をプーリ軸２０ａを介して上方から片支持する支持プレート２５と、支持軸２６の搬送終端側下面により斜め上方に向かって取り付けられ搬送終端側プーリ１９，１９をプーリ軸１９ａを介して下方から支持する中間ケース２４ｄとを一体形成して構成している。
【００３１】
ここで、支持部材Ｇ，Ｇが引抜搬送ベルト２２，２２の周回内に収めるのは、作物体Ｐの引っ掛かり及びゴミや茎葉の滞留の防止の他、引抜搬送ベルト２２，２２の交換等メンテナンスをしやすくするためである。
引抜搬送ベルト２２の構成について説明すると、図５に示すように一方のベルトの外周面下側に周方向連続する突起部２２ａを形成している。そして、この突起面２２ａと他方の引抜搬送ベルト２２のベルト外周面とがは作物体Ｐを引き抜き挟持搬送する面となっている。そのため、該突起部２２ａの上方と対向するベルト外周面との間に空間Ｋが形成され、非挟持面になるため、根本部ｒに近い位置に付いている枝豆等の最終収穫物Ｂにベルトが作用しなくなり傷がつきにくいものになると共に、他方のベルト外周面には突起部を形成しないことで、作物体Ｐを直立姿勢に支持する作用が増大し、作物体Ｐを良好に搬送できる。突起部は図６のように両方の搬送ベルト２２に突起面を備えても良い。この場合にはより最終収穫物Ｂに作用する面がより少なくなるため傷がつきにくいものになる。また、図７に示すようにベルトと異なる材質（例えばスポンジ等の弾性体２２ｂ）を別途搬送ベルト２２，２２の外周面下方に取り付けても良い。
【００３２】
抜取り搬送装置２は作物体Ｐを機体に対して斜め後上方へ搬送するが、搬送装置２の斜め後上方への搬送速度のうち機体後方水平方向の速度成分の大きさは、走行装置１による機体前方水平方向への作業走行速度の大きさと略同じ大きさとなるよう設定する。このように設定すると、作業走行中、作物体Ｐは、抜取り搬送装置２によって、圃場Ｅに対して前後に倒れないで略垂直姿勢で搬送されるようになる。
【００３３】
前記支持体２７，２７は、ここでは、前記支持フレーム１８，１８に固着の支持体フレーム２８に取り付けている。また、支持体２７，２７は調節ハンドルＭにより取付け高さを調節自在に設けており、これにより、抜取り搬送装置２の作物体挟持始端部Ｓの畝Ｕに対する高さを適当な高さに調節して設定でき、作物体Ｐの生育状態に対応して抜取り搬送装置２の作物体Ｐの根本部ｒの挟持個所を適当に上下調節できて作物体Ｐの抜取り収穫作業が良好に行える。なお、左右の支持体２７，２７の各前方には分草体２９，２９を設けている。
【００３４】
排土板３ａ，３ａと分土板４ａ，４ａとは、抜取り搬送装置２の左右の搬送始端側プーリー２０の支軸上端部に取り付け、支持プレート２５に対し固定した左右のブラケット３０，３０の各先端部に、左右位置調節自在に且つ上下位置調節自在に取り付けている。左右の分土板４ａ，４ａは、抜取り搬送装置２の作物体挟持始端部Ｓの前方に適宜間隔（作物体Ｐの根本部ｒの幹の径の約２倍程度の間隔）をあけて、板面が機体進行方向ｄと上下方向とに沿う姿勢で互いに左右平行となるようにして設ける。排土板３ａ，３ａは、左右の分土板４ａ，４ａの外側面に左右内側端部を固着し左右外側が後側になるように機体平面視で前後に傾斜した姿勢で且つ上下方向においては略直立姿勢で取り付けている。左右の分土板４ａ，４ａの前端縁は、上側が下側より前方になるよう機体側面視で傾斜するように形成して、機体前進時に分土板４ａ，４ａが円滑に土を左右に分断しながら前進できるようにしている。
【００３５】
また、作物体Ｐの根本側の茎葉部を上方に持ち上げるための左右ガイド体３２，３２を設けている。この左右ガイド体３２，３２は、基部を左右の分土板４ａ，４ａの前側上端部に取付け固定していて、作物体Ｐの根本側の茎葉部を上方に持ち上げるためのガイド作用部となる部分を、左右の分土板４ａ，４ａより左右外側に位置させて、後ろ上がり姿勢に設けている。この左右ガイド体３２，３２の前端部は、作業走行時には、作物体Ｐの地上にある根本部ｒ（幹部）の左右両側方に入り込んで、機体進行にともないその上方にある茎葉部を上方に持ち上げていくようになっている。これにより、更に一層、抜取り搬送装置２が作物体Ｐの根本部ｒを挟むときに圃場面近くの最終収穫物Ｂを一緒に挟まないようになり、抜取り搬送装置２による最終収穫物Ｂの損傷が一層生じにくくなる。
【００３６】
抜取り搬送装置２の後側には、抜取り搬送装置２から排出される作物体Ｐを受ける受け台３３を設けている。この受け台３３は、左右中央部に固定台３４と、その左右両側に、機体内側に移動可能に設けた移動受け台３５，３５を設けて構成している。左右の移動受け台３５，３５は、左右外方に水平状に張り出す姿勢と、上方に起立する姿勢に対し機体内側に移動した姿勢とに移動可能且つ各姿勢で保持可能に設けている。具体的には、ここでは、左右中央の固定台３４の左右両側部に前後方向の支軸を設けて、この支軸に左右の移動受け台３５，３５の左右内端部を回動自在に取り付け、左右外方に水平状に張り出す姿勢と、その姿勢から上方に回動して起立する姿勢とに移動可能且つ且つ各姿勢で保持可能に設けている。複数列の畝Ｕ・・・に作物体Ｐ・・・が植生していて、一畝ごとに作物体Ｐ・・・を収穫していく場合、未収穫の畝側の移動受け台３５は起立姿勢とし、収穫済みの畝側の移動受け台３５は左右外方に水平状に張り出す姿勢とする。そして、抜取り搬送装置２から後方に排出された複数の作物体Ｐ・・・は、左右中央の固定台３４と左右外方に水平状に張り出す姿勢とした移動受け台３５上に置かれていく。満載状態になれば水平状に張り出した移動受け台３５から左右外側方に移動させて圃場に落下させて置いて行く。
【００３７】
以上のように構成した収穫機は、走行装置１が機体進行方向ｄに向って走行させ、そして、その走行中に、抜取り搬送装置２が、作物体Ｐの根本部ｒを挟んで上方に搬送し作物体Ｐを圃場Ｅから抜取っていく。また、分土装置４が、作物体Ｐの根本部ｒの左右の土を左右に分断し、そして、排土装置３が、その左右に分断された土の左右外側の土を左右外側方に移動させて排出し、このようにして左右の土が排出された個所に抜取り搬送装置２の作物体挟持始端部Ｓが進んで行って、地中にあった作物体Ｐの根本部ｒを引抜搬送ベルト２２，２２が挟んで作物体Ｐを圃場Ｅから抜取って上方に搬送していく。そして、作物体Ｐは連続する多数の作物体支持ローラ２１ｂ…，２１ｂ…、の挟持作用を受けて確実に搬送され、泥落し装置駆動ローラ２１ｃ、２１ｃ間、すなわち回転する泥落し装置Ｄを通過するとき作物体Ｐの根本部ｒに付着している泥等を落としていく。そして、搬送終端部Ｔ，Ｔより受け台３３，３３に落下放出していく。
【００３８】
その際、支持部材Ｇ，Ｇは搬送始端側プーリ２０，２０を上方より片持ち支持するよう構成しているため、引抜搬送ベルト２２，２２で作物体Ｐの根本部ｒを挟む時、より地面に近い位置に引抜搬送ベルト２２，２２を近づけて作物体Ｐの根本部ｒを挟むことができる。従って作物体Ｐの地上部分についている枝豆等の最終収穫物Ｂからより離れた位置で挟むことが可能になり、作物体Ｐの根本部ｒに近い位置でついている枝豆等の最終収穫物Ｂを引抜搬送ベルト２２，２２が挟んで傷つけることが生じにくくなる。また、支持部材Ｇは搬送始端側プーリ２０，２０をプーリ軸２０ａを介して上方より片持ち支持すると共に、搬送終端側プーリ１９、１９をプーリ軸１９ａの下方より片持ち支持するよう構成しているため、作物体Ｐを挟んで引抜く時には請求項１で記載したように作物体Ｐの根本部ｒに近い位置でついている枝豆等の最終収穫物Ｂを引抜搬送ベルト２２，２２が挟んで傷つけることが生じにくくなるものでありながら、搬送終端側Ｔでは枝豆等の最終収穫物Ｂが支持部材に当たって傷つけることが生じにくくなる。
【図面の簡単な説明】
【図１】収穫機の側面図。
【図２】収穫機の平面図。
【図３】収穫機の一部の作用状態を示す平面図。
【図４】収穫機の一部の作用状態を示す図で、（ａ）は背面視断面図、（ｂ）は平面図、（ａ）は側面図。
【図５】搬送ベルト２２が作物体Ｐを挟持搬送していることを示す図
【図６】搬送ベルト２２が作物体Ｐを挟持搬送していることを示す図
【図７】搬送ベルト２２が作物体Ｐを挟持搬送していることを示す図
【符号の説明】
２：抜取り搬送装置
１９：搬送終端プーリ
２０：搬送始端プーリ
２２：引抜搬送ベルト
Ｓ：作物体挟持始端部
Ｐ：作物体
ｒ：作物体の根本部
Ｂ：最終収穫物
Ｅ：圃場
Ｇ：支持部材
Ｋ：空間部[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention belongs to the technical field of a harvester for holding an above-ground portion of a crop body such as green soybeans vegetated in a field to ascend and convey the crop body from the field.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a drawing and harvesting machine such as green soybeans that pulls a crop plant vegetated in a field with a pulling and conveying belt provided in an upwardly inclined state and conveys the rearward. Patent Document 1 below describes a configuration in which a transmission case is provided below the transport belt and the transport start end pulley is supported from below as a configuration for supporting the pulley on the transport start end around which the pull-out transport belt is wound. I have.
[0003]
[Patent Document 1] JP-A-2002-142532
[0004]
[Problems to be solved by the invention]
For crops such as green soybeans that have the final crop on the foliage above the ground, the final crop may be located close to the root, so the pull-out conveyor belt clamps the foliage as close to the ground as possible. It is desirable. However, if the pulley at the transport start end is configured to be supported from below as described in Patent Literature 1, the pull-out transport belt pulls out the crop from the field by the thickness of the supporting member (transmission case). The position becomes higher. In such a case, the final harvest at a position close to the root is pulled out, and the transport belt is pinched, thereby damaging the final harvest.
[0005]
The present invention relates to a final crop such as green soybeans when crops are extracted from a field or when the crops are conveyed backward in the case of a crop such as green soybeans having a final crop on the foliage of the above-ground portion. The goal is to minimize damage.
[0006]
[Means for Solving the Problems]
Means for Solving the Problems In order to solve the above problems, the present invention has the following configurations.
The invention according to claim 1 is a harvesting machine in which a pair of left and right pull-out transport belts 22 for holding and transporting the crop P vegetated in the field E and pulling out from the field E are provided in an upwardly inclined state. A pull-out transport device for a harvester, characterized in that the transport start-end pulleys 20, 20 around which the belts 22, 22 are wound are cantilevered from above the transport start-end pulleys 20, 20, respectively.
[0007]
According to the second aspect of the present invention, the crop body P vegetated in the field E is pinched and conveyed and pulled out of the field E, and is circumferentially continuous below at least one of the pair of left and right pull-out conveyance belts 22, 22. A drawing and conveying device for a harvester, wherein a space K is formed on the upper side of the outer peripheral surface of the belt at a position where the left and right belts are opposed to each other by forming the protruding portion 22a.
[0008]
The invention according to claim 3 is characterized in that the transport start end pulleys 20 and 20 are cantilevered from above and the transport end side pulleys 19 and 19 are cantilevered from below. It is a pulling and conveying device of the machine.
[0009]
[Action]
The operation of the harvester according to the present invention will be described. The pull-out conveyor belts 22 of the pull-out conveyor 2 pull out the crop body P with the root portion r interposed therebetween and convey the crop body P upward to pull out the crop body P from the field. To go. Then, the crops transported from the transport end side T of the pull-out transport belts 22 and 22 are sequentially released.
[0010]
【The invention's effect】
According to the first aspect of the present invention, since the transport start side pulleys 20 are configured to be cantilevered from above, the pulling transport belts 22, 22 sandwich the root portion r of the crop P more closely to the ground. The root portion r of the crop P can be sandwiched by bringing the pull-out conveyor belts 22 and 22 closer to a close position. Accordingly, it is possible to sandwich the final crop B such as green soybeans on the above-ground portion of the crop P at a position farther from the final crop B such as green soybeans. It is less likely that the pull-out conveyance belts 22, 22 will be caught and damaged.
[0011]
According to the second aspect of the present invention, when a protrusion 22a that is continuous in the circumferential direction is formed below the outer peripheral surface of at least one of the pair of left and right pull-out and conveyance belts 22 formed at the position where the left and right belts face each other. Since the space K is formed on the upper side of the outer peripheral surface of the belt, the belt hardly causes the final crop B such as green soybeans attached at a position close to the root r of the crop P to be damaged by the belt.
[0012]
According to the third aspect of the present invention, since the transport start side pulleys 20 and 20 are cantilevered from above and the transport end side pulleys 19 and 19 are cantilevered from below, the crop P is sandwiched. At the time of pulling out, the pulling conveyor belts 22 and 22 are less likely to damage the final crop B such as green soybeans attached at a position near the root r of the crop body P as described in claim 1. However, on the transport end side T, it is less likely that the final crop B such as green soybeans hits the support member of the transport end side pulleys 19 and 19 and is damaged.
[0013]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
DETAILED DESCRIPTION OF THE INVENTION As one embodiment of the present invention, a harvester for extracting and harvesting a crop body whose final crop is soybean from a field will be described in detail below.
As shown in the figure, this harvester is provided with a traveling device 1 and a work unit W for performing a harvesting operation of a crop body P. The traveling device 1 causes the aircraft to travel in a traveling direction d, and During this traveling, the working unit W performs the harvesting work of the crop body P. As a result, the harvester mechanically and continuously harvests the crops P arranged in the machine body traveling direction d.
[0014]
As an example of the traveling device 1, a pair of left and right wheels 5, 5 that are driven and rotated to travel in valleys V on both sides of a ridge U formed in a field E are provided, and the aircraft is configured to travel by itself. The wheels 5, 5 are driven to rotate by the transmission of power from an engine 6 disposed on the rear side of the fuselage. Specifically, the power of the engine 6 is transmitted to a transmission mechanism in a transmission case 7 disposed in front of the engine 6 and connected to the engine 6, and is transmitted to the left and right sides of the transmission case 7 through the transmission mechanism. The power is transmitted to the transmission mechanism in the fixed wheel transmission cases 8, 8, and is transmitted to the axles 9, 9 projecting outward in the left-right direction below the wheel transmission cases 8, 8 and attached to the axles 9, 9. The wheels 5 and 5 are driven and rotated. Note that the traveling device 1 may be configured as a crawler instead of a wheel.
[0015]
Further, a walking-type steering handle 10 is provided at the rear of the body so that the left and right grips 11, 11 are located at the rear end of the body as a control section of the body. A handle frame 12 extending forward from the grip portions 11, 11 of the steering handle 10 is inclined downward, extends forward, and has a base fixed to the transmission case 7. Further, side grip levers 13, 13 operated by the gripping operation of the operator are provided on the left and right sides of the grip portions 11, 11 of the steering handle 10, so that transmission to the left and right wheels 5, 5 is individually performed. It can be shut off and the aircraft can be turned easily. Further, an operation lever 14 for operating a clutch for connecting / disconnecting the transmission to the extracting / conveying device 2 and an operation lever 15 for operating a clutch for connecting / disconnecting the transmission from the engine 6 to the transmission mechanism in the transmission case 7 are arranged. The portion 16 is provided near the front side of the grip portions 11 of the steering handle 10.
[0016]
Next, the working unit W will be described.
The work unit W is provided with a sampling and conveying device 2 that conveys the crop P upward from the field E while sandwiching the root r of the crop P during work traveling. Therefore, the traveling apparatus 1 causes the machine body to travel in the traveling direction d, and during the traveling, the sampling and transporting apparatus 2 transports the crop body P upward with the root portion r of the crop body P interposed therebetween, and moves the crop body P to the field E. I will extract from. Thereby, the harvester mechanically and continuously extracts the crops P arranged in the machine body traveling direction d from the field E, and extracts the crops P such as green soybeans from the field E. The labor of harvesting can be reduced compared to the conventional work that requires manual labor. Here, the root part r is referred to as a root part in the vicinity of the ground surface and the underground trunk near the ground surface of the crop P, and the underground root part.
[0017]
Supports (free-wheeling wheels in the illustrated example) 27, 27 for supporting the working unit W on the field E (left and right valleys V, V of the ridge U) are provided on the lower left and right sides of the front of the working unit W. Provided. With the provision of the supports 27, 27, the working unit W is configured such that when the crop body P is removed from the ridge U by the sampling and transporting apparatus 2 transporting the crop body P growing on the ridge U upward and transporting the crop body P upward. The work unit W is supported by the support members 27 and 27 that are to be lowered.
[0018]
In front of the crop body holding start end S of the sampling and transporting apparatus 2 and the front of the supports 27, 27, the soil removal is performed by moving the soil left and right of the root part r of the crop body P in the ground to the left and right outside and discharging. An apparatus 3 is provided. Accordingly, in this harvester, the soil discharging device 3 discharges the left and right soil of the root part r of the crop P underground toward the outside of the left and right supports 27, 27, and thus the left and right soil. The crop body holding start end S of the sampling and transporting device 2 proceeds to the place where the is discharged, and the root portion r of the crop P which was in the ground is transported upward with the sampling and transporting device 2 sandwiched. From the field E. As a result, it is less likely that the final harvested product B near the ground surface of the crop body P will be damaged by the sampling and transporting device 2. In addition, since the earth discharging device 3 is provided in front of the supports 27, 27, the soil discharged by the earth discharging device 3 moves laterally through the front sides of the supports 27, 27. By staying inside the support 27, it is possible to prevent the supports 27, 27 from hindering advance.
[0019]
The earth removal device 3 is configured such that the earth removal plates 3a, 3a, which are composed of a plate body and whose earth removal surface at the front surface of the plate body is located on the rear side in the machine body traveling direction toward the left and right outer sides, are located on the left and right sides of the root r of the crop body P. It is arranged right and left so as to pass on both sides. Accordingly, the earth discharging device 3 can be simply configured, and the size and weight of the earth discharging device 3 and the cost can be reduced.
[0020]
Further, in front of the soil discharging device 3, a soil separating device 4 for separating the soil on the left and right of the root part r of the crop body P into right and left is provided. Therefore, in this harvester, the soil separating device 4 separates the left and right soil of the root part r of the crop P in advance into the left and right, that is, the left and right soil of the root r of the crop P is directed in the traveling direction d. To form a kerf, and the earth discharging device 3 moves the soil on the left and right outer sides of the soil divided right and left to the left and right sides and discharges the soil. Can be If the soil separator 4 is not provided, it is difficult for the soil discharging device 3 to move the soil to the left and right sides smoothly, particularly in the case of low fluidity soil such as hard soil or highly viscous soil. . Further, in such a case, when the discharging device 3 is constituted by the left and right discharging plates 3a, 3a as described above, the movement of the soil to the left and right outer sides is difficult to be performed smoothly, and the discharging is difficult. The soil may stay in the front of the plates 3a, 3a, and the earth discharging plates 3a, 3a may push the soil, and the earth discharging may not be performed well. However, even in such a case, the provision of the above-described soil separation device 4 allows the soil to move smoothly to the left and right outer sides, so that the soil can be discharged well.
[0021]
Further, the soil separating device 4 can also divide the soil into right and left directions in the body traveling direction d by an actuated body that is driven. However, here, the structure of the body is simplified, the weight and size are reduced, and the cost is reduced. From the viewpoint, it is constituted by a working body fixed to the body. Specifically, dividing plates 4a, 4a formed of flat plates are provided. The earth separating plates 4a, 4a are arranged so that their plate surfaces are oriented along the machine body traveling direction d and the vertical direction, and are disposed left and right in front of the left and right inner ends of the earth discharging action portions 3a, 3a of the earth discharging device 3. Constitute. The dividing plates 4a, 4a serve as dividing action portions for dividing the soil. Therefore, in this harvester, the left and right soil separating plates 4a and 4a of the soil separating device 4 advance while sunk into the soil with the plate surface in a posture along the machine body traveling direction d and the vertical direction. The right and left soil of the part r is divided into right and left. For this reason, the separating plates 4a, 4a have high straightness in the soil, and the running of the separating plates 4a, 4a is less likely to be left or right shifted during traveling. Therefore, it is difficult for the root part r of the crop body P to come off from between the left and right dividing plates 4a, 4a, and the operation can be favorably performed.
[0022]
The rear portions of the earth separating plates 4a, 4a extend rearward from the left and right inner ends of the earth discharging action portions 3a, 3a of the earth discharging device 3. Thereby, the root part r of the crop body P passes between the left and right dividing plates 4a, 4a to near the crop body holding start end S of the sampling and conveying device 2. Accordingly, while the root portion r of the crop body P passes between the dividing plates 4a and 4a and reaches the crop body holding start end S of the extraction and transfer device 2, the machine body is shifted left and right, and the root portion r of the crop body P is shifted. Is not supplied properly to the crop body holding start end S of the sampling and transporting apparatus 2, and the cropping work of the crop body P can be further promoted.
[0023]
The rear portions of the earth separating plates 4a, 4a extend rearward from the left and right inner ends of the earth discharging action portions 3a, 3a of the earth discharging device 3. Thereby, the root part r of the crop body P passes between the left and right dividing plates 4a, 4a to near the crop body holding start end S of the sampling and conveying device 2. Accordingly, while the root portion r of the crop body P passes between the dividing plates 4a and 4a and reaches the crop body holding start end S of the extraction and transfer device 2, the machine body is shifted left and right, and the root portion r of the crop body P is shifted. Is not supplied properly to the crop body holding start end S of the sampling and transporting apparatus 2, and the cropping work of the crop body P can be further promoted.
[0024]
The front part of the earth separating plates 4a, 4a has a line x extending vertically forward from the left and right inner ends and lower ends of the earth discharging portions 3a, 3a of the earth discharging plates 3a, 3a. It extends forward from a point z that intersects a line y extending from the outer end and the lower end in the left-right direction in the body traveling direction d in the plane of the body. As a result, the earth removal surfaces of the earth removal plates 3a, 3a advance and are pushed out and move to the left and right outwards. In this case, the soil is sufficiently divided, so that the soil is discharged well, and the work of extracting the crop P can be favorably advanced.
[0025]
The soil separation depth of the soil removal device 4 is provided to be substantially the same as or deeper than the soil removal depth of the soil removal device 3. Specifically, the lower end position of the dividing action portion of the earthing device 4, here the lower end position of the earthing plates 4a, 4a, is in relation to the lower end position of the earth discharging action portions 3a, 3a of the earth discharging device 3 in the vertical direction. It is provided such that the lower end position of the dividing plates 4a, 4a is located substantially at the same position or lower. As a result, the earth removal surfaces of the earth removal plates 3a, 3a advance and are pushed out to move right and left outward, and the soil separation plates 4a, 4a vertically separate the left and right inner portions of the earth portion from the left and right sides. In this case, the soil is sufficiently divided, so that the soil is discharged well, and the work of extracting the crop P can be favorably advanced.
[0026]
A more specific configuration of each part of the working unit W will be described below.
The working unit W is disposed at the front of the fuselage, and has two transmission frames 17, 17 extending obliquely forward and upward from the front of the transmission case 7, and left and right extending obliquely downward from the front of the transmission case 7. It is attached to each tip of the two support frames 18,18.
[0027]
The pull-out transporting device 2 includes transport end pulleys 19, 19, transport start end pulleys 20, 20, tension pulleys 21a, 21a; 21a, 21a, and a large number of crop support rollers 21b,. .. Are provided continuously, and a plurality of drive rollers 21c, 21c in the middle of the conveyance are provided in a staggered manner on the left and right. The left and right pull-out conveyor belts 22 are driven by the drive rotation of the transport-end pulleys 19, 19 so that the left and right pull-out conveyor belts 22, 22 are driven to rotate by the drive rotation of the transfer end pulleys 19, 19, respectively. The belt outer peripheral surfaces on the left and right inner sides of the drawing and conveying belts 22 and 22 are provided so as to be in contact with or close to each other. The crop body nipping start end S of the extracting and conveying device 2 is a place where the left and right conveying belts 22 start to contact or approach the outer peripheral surfaces of the belts at the left and right center sides at the front end of the extracting and conveying belts 22. When the root portion r of the crop body P is supplied to the left side, the left and right conveyor belts 22 and 22 are transported upward with the root portion r of the crop body P therebetween, and the crop body P is extracted from the field E.
[0028]
The transmission configuration to the left and right conveyor belts 22 will be described. The transmission case 7, the left and right transmission frames 17, 17 containing the drive shafts 23, 23, and the drive shafts 23, 23 rotate integrally with the front end portions thereof. The attached first intermediate pulleys 24a, 24a, the second intermediate pulleys 24b, 24b attached to the shaft 19a of the transport end side pulleys 19, 19, the first intermediate pulleys 24a, 24a, and the second intermediate pulleys 24b, 24b. And a first intermediate pulley 24a, 24a, a second intermediate pulley 24b, 24b, and an intermediate belt 24c are housed in an intermediate case 24d to form an intermediate transmission portion 24. .
[0029]
To explain the power transmission, the power in the transmission case 7 is transmitted to the drive shafts 23, 23, and then through the first intermediate pulleys 24a, 24a, the intermediate belt 24c, and the second intermediate pulleys 24b, 24b, to the transport end side. The pulleys 19, 19 rotate. Then, the left and right pull-out transport belts 22 rotate so that the outer peripheral surfaces of the left and right inner belts move rearward, and when the pull-out transport belts 22 further rotate, the mud-driving device driving rollers 21c at the transport intermediate portion 21c. Is also driven to rotate.
[0030]
The mounting configuration of the pull-out and transport device 2 will be described in detail. Support members G and G are provided in the rotation of the pull-out and transport belts 22 and substantially in parallel. The support members G, G are tension pulleys 21a, 21a; 21a, 21a, crop support rollers 21b, 21b, support shafts 26 for supporting the mud-driving device drive rollers 21c, 21c, and the upper surface of the support shaft 26 on the transport start end side. A support plate 25 which extends diagonally downward and supports the transfer start side pulleys 20, 20 from above via a pulley shaft 20 a, and a transfer plate which is attached diagonally upward by a transfer terminal side lower surface of the support shaft 26. The end-side pulleys 19 are integrally formed with an intermediate case 24d for supporting the pulleys 19 from below via a pulley shaft 19a.
[0031]
Here, the support members G, G are accommodated in the circulation of the pull-out conveyor belts 22, 22, in order to prevent the crop body P from being caught and to prevent garbage and foliage from staying, and to perform maintenance such as replacement of the pull-out conveyor belts 22, 22. This is to make it easier.
Describing the configuration of the pull-out conveyance belt 22, as shown in FIG. 5, a protrusion 22a that is continuous in the circumferential direction is formed below the outer peripheral surface of one of the belts. The protruding surface 22a and the outer peripheral surface of the other pulling and conveying belt 22 form a surface for pulling out the crop P and holding it. Therefore, a space K is formed between the upper side of the protrusion 22a and the outer peripheral surface of the belt, and the space K is formed as a non-clamping surface, so that the belt is attached to the final crop B such as green soybeans near the root r. Does not work, and the surface of the other belt is not formed with a protrusion, so that the function of supporting the crop P in the upright posture is increased, and the crop P can be conveyed favorably. . As shown in FIG. 6, the projections may be provided on both the conveyor belts 22 with projections. In this case, the surface acting on the final crop B is further reduced, so that the surface is less likely to be damaged. Further, as shown in FIG. 7, a material different from the belt (for example, an elastic body 22b such as sponge) may be separately attached below the outer peripheral surfaces of the transport belts 22,22.
[0032]
The sampling conveyance device 2 conveys the crop body P obliquely rearward and upward with respect to the machine body. Among the conveyance speed of the conveyance device 2 obliquely rearward and above, the magnitude of the speed component in the machine body horizontal direction is determined by the traveling device 1. It is set to be substantially the same as the magnitude of the work traveling speed in the horizontal direction in front of the aircraft. With this setting, the crop P is transported by the extraction transport device 2 in a substantially vertical posture without falling back and forth with respect to the field E during the work traveling.
[0033]
Here, the supports 27 are attached to a support frame 28 fixed to the support frames 18. In addition, the support members 27, 27 are provided so that the mounting height can be freely adjusted by an adjusting handle M, whereby the height of the crop body holding start end S of the sampling and conveying device 2 with respect to the ridge U is adjusted to an appropriate height. The holding position of the root portion r of the crop P of the sampling and transporting device 2 can be appropriately adjusted up and down in accordance with the growing state of the crop P, so that the sampling and harvesting of the crop P can be favorably performed. In addition, weeding bodies 29, 29 are provided in front of the left and right supports 27, 27, respectively.
[0034]
The discharge plates 3a, 3a and the separation plates 4a, 4a are attached to the upper ends of the support shafts of the left and right transfer start side pulleys 20 of the extraction transfer device 2, and fixed to the support plate 25 by the left and right brackets 30, 30. Attached to each tip so that the horizontal position can be adjusted and the vertical position can be adjusted. The left and right dividing plates 4a, 4a are appropriately spaced in front of the crop body holding start end S of the sampling and conveying device 2 (about twice the diameter of the trunk of the root r of the crop body P). The plate surfaces are provided so as to be parallel to each other in the posture along the body traveling direction d and the vertical direction. The earth discharging plates 3a, 3a are fixed to the left and right inner ends on the outer surfaces of the left and right dividing plates 4a, 4a, and are inclined forward and backward in the plane view of the fuselage so that the left and right outer sides are rear sides, and in the vertical direction. Is mounted in a substantially upright position. The front edges of the left and right dividing plates 4a, 4a are formed so as to be inclined in the side view of the fuselage such that the upper side is forward from the lower side, so that the dividing plates 4a, 4a smoothly move the soil left and right when the fuselage advances. They are able to move forward while dividing.
[0035]
Further, left and right guides 32, 32 are provided for lifting the foliage on the root side of the crop body P upward. The left and right guide members 32, 32 have their bases fixed to the front upper ends of the left and right dividing plates 4a, 4a, and serve as guide action portions for lifting the root foliage of the crop P upward. The portion is located on the left and right outside of the left and right dividing plates 4a, 4a, and is provided in a rear-up posture. The front end portions of the left and right guide bodies 32, 32 enter the left and right sides of the root r (stem) on the ground of the crop body P during work traveling, and the foliage above the crop body P moves upward as the machine body advances. It is designed to be lifted. Thereby, when the sampling and transporting apparatus 2 sandwiches the root r of the crop P, the final crop B near the field scene is not pinched together, and the sampling and transporting apparatus 2 damages the final harvest B. Is more unlikely to occur.
[0036]
A receiving stand 33 for receiving the crop P discharged from the sampling and transporting device 2 is provided behind the sampling and transporting device 2. The cradle 33 includes a fixed pedestal 34 at the left and right central portions, and movable cradles 35 and 35 movably provided on the left and right sides on the inside of the machine body. The left and right movement receiving bases 35, 35 are provided so as to be movable between a posture extending horizontally horizontally to the left and right and a posture moved inward with respect to a posture standing upward and capable of being held in each posture. More specifically, here, a support shaft in the front-rear direction is provided on both left and right sides of a fixed base 34 at the center in the left and right directions, and the left and right inner ends of the left and right movement receiving bases 35, 35 are rotatable on this support shaft. It is mounted so that it can be moved between a posture in which it extends horizontally horizontally outward and a posture in which it turns upward from the posture and stands up, and can be held in each posture. When crops P ... are vegetated on a plurality of rows of ridges U ... and the crops P ... are harvested for each ridge, the unharvested ridge side moving cradle 35 stands. The posture is such that the harvested ridge-side movement cradle 35 projects horizontally left and right outward. The plurality of crops P discharged backward from the sampling and transporting apparatus 2 are placed on a fixed base 34 at the center in the left and right direction and on a movement receiving base 35 in a posture of horizontally projecting left and right outward. Go. When it is full, it is moved left and right outward from the horizontally-moving receiving cradle 35, dropped on the field, and left.
[0037]
In the harvester configured as described above, the traveling device 1 travels in the machine body traveling direction d, and during the traveling, the sampling and transporting device 2 transports the crop body P upward with the root portion r interposed therebetween. Then, the crop body P is extracted from the field E. Further, the soil separating device 4 divides the left and right soil of the root part r of the crop body P into right and left, and the soil discharging device 3 divides the left and right outer soil of the left and right soil into the left and right outer side. It is moved and discharged, and the crop body holding start end S of the extracting and transporting device 2 proceeds to the location where the left and right soil is discharged in this way, and pulls out the root part r of the crop body P that was underground. The crop P is pulled out from the field E and transported upward by the transport belts 22, 22. Then, the crop P is reliably transported by being pinched by a large number of continuous crop support rollers 21b, 21b, and passes through the mud-driving device driving rollers 21c, 21c, that is, passes through the rotating mud-driving device D. At this time, mud and the like adhering to the root part r of the crop body P are dropped. Then, they are dropped and discharged from the transport end portions T, T to the receiving tables 33, 33.
[0038]
At this time, since the support members G, G are configured to support the transport start end side pulleys 20, 20 from above, the pulling transport belts 22, 22, when the root portion r of the crop P is sandwiched between the pulleys 20, 20, the ground surface. The root portion r of the crop body P can be sandwiched by bringing the pull-out conveyance belts 22 and 22 closer to a position close to. Accordingly, it is possible to sandwich the final crop B such as green soybeans on the above-ground portion of the crop P at a position farther from the final crop B such as green soybeans. It is less likely that the pull-out conveyance belts 22, 22 will be caught and damaged. The support member G is configured to support the transport start end pulleys 20 and 20 cantilever from above through a pulley shaft 20a, and to support the transport end pulleys 19 and 19 cantilever from below the pulley shaft 19a. Therefore, when pulling out the crop P, the pulling conveyor belts 22 sandwich the final crop B such as green soybeans attached to a position near the root r of the crop P as described in claim 1. Although the damage is less likely to occur, it is less likely that the final crop B such as green soybeans hits the support member and is damaged on the transport end side T.
[Brief description of the drawings]
FIG. 1 is a side view of a harvester.
FIG. 2 is a plan view of the harvester.
FIG. 3 is a plan view showing an operation state of a part of the harvester.
FIGS. 4A and 4B are diagrams showing a partial operation state of the harvester, wherein FIG. 4A is a rear view sectional view, FIG. 4B is a plan view, and FIG.
FIG. 5 is a diagram showing that the transport belt 22 is nipping and transporting the crop P.
FIG. 6 is a diagram showing that the conveyor belt 22 is pinching and conveying the crop body P.
FIG. 7 is a diagram showing that the transport belt 22 is nipping and transporting the crop P.
[Explanation of symbols]
2: Sampling conveyance device
19: Transfer end pulley
20: Pulley at the beginning of conveyance
22: Pull-out conveyor belt
S: Crop body clamping start end
P: crop body
r: Root of crop
B: Final crop
E: Field
G: Support member
K: Space