JP4696386B2

JP4696386B2 - Seedling transplanter

Info

Publication number: JP4696386B2
Application number: JP2001109152A
Authority: JP
Inventors: 勝野　　志郎; 木下　　栄一郎; 大久保　　嘉彦; 裕明小野; 貴志伊藤
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2001-04-06
Filing date: 2001-04-06
Publication date: 2011-06-08
Anticipated expiration: 2021-04-06
Also published as: JP2002305921A

Description

【０００１】
【発明の属する技術分野】
本発明は、畑用の苗移植機の技術分野に属する。
【０００２】
【従来の技術】
従来、昇降駆動するリンク機構と連結して昇降動作する開閉可能なくちばし状の苗植付け具と、走行装置と、操縦ハンドルとを備えた歩行型の苗移植機では、苗を収容するカップを複数備えたターンテーブルを苗植付け具の上方に配置して、苗植付け具が上昇したときターンテーブルのカップの底蓋が開きそのカップに収容された苗が落下して苗が苗植付け具に供給される構成としていた。
【０００３】
【発明が解決しようとする課題】
ところで、畑に移植する苗の形状や大きさは多種多様である。大きい苗もあれば小さい苗もあり、また、葉が広がった苗もあれば細長く伸びた苗もある。更に、セル成形苗のような土付き苗もあれば根にブロック状の土が付いていない所謂裸苗もある。上記のような従来の苗移植機は、苗の形状、大きさの相違にある程度対応できるものであるが、例えば、茎葉部が長い苗や重量が軽い裸苗の場合には、カップの底蓋が開いて苗が苗植付け具に供給される際に苗がカップ等に引っかかって苗植付け具に適確に落下しないことがあって、植付不良を生じることがあった。そこで、本発明は、苗の種類や形状、大きさ等が相違しても適確に移植できる苗移植機を得ることを課題とする。
【０００４】
【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、以下のような構成のものとした。
請求項１記載の発明は、昇降駆動するリンク機構と連結して昇降動作する開閉可能なくちばし状の苗植付け具と、走行装置と、操縦ハンドルとを備えた歩行型の苗移植機において、前記苗植付け具内に苗を案内する筒状の案内体を、前記苗植付け具の開閉支点より上方に突出させて苗植付け具の上部に設けるとともに、案内体の上端開口部が苗植付け具が最上位に位置するときに前記操縦ハンドルのグリップ部の上下位置近傍に位置するように設けて、作業者が該案内体の上端開口部内に直接苗を投入して苗植付け具に苗を供給できる程度に前記筒状の案内体の上端開口部を下端開口部より広く設けるとともに、該上端開口部が機体平面視で案内体の下部外周近傍に配置した苗植付け具と前記リンク機構との連結部の上方に重なるように設け、苗植付け具が最上位に位置するとき苗植付け具と前記リンク機構との連結部の側方及び後方を覆うガード体を設け、該ガード体の上端部より前記案内体が上方に突出するように設けたことを特徴とする苗移植機とした。
【０００５】
【０００６】
【０００７】
【作用】
本発明の苗移植機は、作業走行中、開閉可能なくちばし状の苗植付け具が昇降駆動するリンク機構によって昇降動作して苗植付け具内に供給された苗を圃場に植付けていく。苗植付け具内への苗の供給は、苗植付け具の上部に設けた筒状の案内体の上端開口部内に作業者が直接苗を投入し、その投入された苗が案内体により案内されて苗植付け具内に落下していって、苗植付け具内に苗が供給される。
【０００８】
そして、請求項１記載の発明では、案内体が、苗植付け具の開閉支点より上方に突出し、しかも、苗植付け具が最上位に位置するとき、案内体の上端開口部が操縦ハンドルのグリップ部の上下位置近傍に位置する。
また、筒状の案内体の上端開口部が、下端開口部より広く、且つ、機体平面視で案内体の下部外周近傍に配置した苗植付け具と前記リンク機構との連結部の上方に重なる。
【０００９】
更に、ガード体が、苗植付け具が最上位に位置するとき苗植付け具と前記リンク機構との連結部の側方及び後方を覆う。しかし、案内体は、ガード体の上端部より上方に突出する。
【００１０】
【発明の効果】
請求項１記載の発明により、作業者は苗植付け具の上部に設けた筒状の案内体の上端開口部内に直接苗を投入して苗植付け具に苗を供給するものとなり、よって、茎葉部が長い苗や重量が軽い裸苗の場合でも、従来のように苗が引っかかって苗植付け具に適確に落下しないというようなことは生じにくくなり、苗の種類や形状、大きさ等が相違しても適確に移植できるものとなる。しかも、案内体の上端開口部が苗植付け具が最上位に位置するときに操縦ハンドルのグリップ部の上下位置近傍に位置するので、作業者が案内体に苗を投入するとき案内体の上端開口部が適当な高さに位置することになって、苗の投入が容易且つ適確に行え作業が能率よく行える。
【００１１】
更に、筒状の案内体の上端開口部が、下端開口部より広く、且つ、機体平面視で案内体の下部外周近傍に配置した苗植付け具と前記リンク機構との連結部の上方に重なるので、案内体の上端開口部内への苗の投入が容易に行え、また、苗を案内体内に投入するときに、昇降動する苗植付け具及びリンク機構に手などが上方から接触してしまうことが生じにくくなり作業が安全に行える。
【００１２】
また、畝間の谷部を歩行しながら苗供給作業を行う作業者は機体側方位置することになるが、苗植付け具が最上位に位置するとき苗植付け具と前記リンク機構との連結部の側方及び後方を覆うガード体を設けているので、苗を案内体内に投入するときに、昇降動する苗植付け具及びリンク機構に手などが側方及び後方から接触してしまうことが生じにくくなり作業が安全に行え、しかも、案内体はガード体の上端部より上方に突出するので、ガード体を設けながらも苗を案内体内に投入する作業は容易に行えるものとなる。
【００１３】
【発明の実施の形態】
この発明の一実施形態としての苗移植機を以下に説明する。尚、以下の図示例についての説明で前又は後というときは、操縦ハンドル２を配置した側を後とし、その反対側、即ちエンジン５を配置した側を前そしていう。そして、右又は左というときは、機体後部において機体前部側を前側として立つ作業者から見て右手側を右とし、左手側が左としていう。
【００１４】
苗移植機は、走行装置１と操縦ハンドル２を備えた機体に、昇降駆動するリンク機構３と連結して昇降動作する開閉可能なくちばし状の苗植付け具４を備えた構成としている。
走行装置１は、図示例では、エンジン５と、該エンジン５の動力が伝達されて駆動回転する左右一対の後輪６，６と、該車輪６，６の前方に転動自在に支持した左右一対の前輪７，７とを備えたものとしている。
【００１５】
エンジン５の後部には、ミッションケース８を配置し、そのミッションケース８は、その左側部からエンジン５の左側方に延びるケース部分を有し、これがエンジン５の左側部と連結している。このケース部分にエンジン５の出力軸が入り込んでミッションケース８内の伝動機構に動力が伝達する構成となっている。ミッションケース８の左右両側部に伝動ケース９，９を回動自在に取り付け、この伝動ケース９，９の回動中心にミッションケース８から左右両外側方に延出させた車輪駆動軸の先端が入り込んで伝動ケース９，９内の伝動機構に走行用の動力を伝達している。そして、走行用の動力は伝動ケース９，９内の伝動機構を介して、機体後方側に延びてその後端側側方に突出する車軸１０，１０に伝動し、後輪６，６が駆動回転するようになっている。
【００１６】
また、伝動ケース９，９のミッションケース８への取付部には、上方に延びるアーム１１，１１を一体的に取り付けていて、これがミッションケース８に固定された昇降用油圧シリンダ１２のピストンロッド先端に上下軸心周りに回動自在に取り付けた天秤杆１３の左右両側部と連結している。その連結部の右側はロッド１４で連結し、左側は伸縮作動可能な左右水平制御用油圧シリンダ１５で連結している。
【００１７】
昇降用油圧シリンダ１２が作動してそのピストンロッドが機体後方に突出すると、左右の前記アーム１１，１１は後方に回動し、これに伴い伝動ケース９，９が下方に回動して、機体が上昇する。反対に、昇降用油圧シリンダ１２のピストンロッドが機体前方に引っ込むと、左右の前記アーム１１，１１は前方に回動し、これに伴い伝動ケース９，９が上方に回動して、機体が下降する。この昇降用油圧シリンダ１２は、機体に対する畝上面高さを検出するセンサーＳの検出結果に基づいて機体を畝上面高さに対して設定高さになるよう作動するよう構成しており、また、操縦ハンドル２近傍に配置した操作具の人為操作によって機体を上昇或は下降させるよう作動する構成ともしている。
【００１８】
また、前記左右水平制御用油圧シリンダ１５が伸縮作動すると、前記天秤杆１３が、その左右中央部の昇降用油圧シリンダ１２のピストンロッド先端と連結する上下軸心周りに回動して左右の伝動ケース９，９を互い違いに上下動させ機体を左右に傾斜させる。この左右水平制御用油圧シリンダ１５は、左右水平に対する機体の左右傾斜を検出するセンサの検出結果に基づいて機体を左右水平になるように作動するよう構成している。
【００１９】
前記左右前輪７，７は、エンジン５下方の左右中央位置で前後方向の軸心周りに回動自在に取り付けた前輪支持フレーム１６の左右両側部の下方に延びるアーム部分の下端部側方に固定した車軸１７，１７に回転自在に取り付けている。従って、左右前輪７，７は、機体の左右中央の前後方向の軸心周りにローリング動自在となっている。
【００２０】
前記操縦ハンドル２は、ミッションケース８に前端部を固定した機体フレーム２ｂの後端部に取り付けている。機体フレーム２ｂは、機体の左右中央から右側に偏った位置に配置されて後方に延び、また、前後中間部から斜め後上方に延びている。操縦ハンドル２は、機体フレーム２ｂの後端部から左右に後方に延びてその各後端部を操縦ハンドル２のグリップ部２ａ，２ａとしている。操縦ハンドル２の左右のグリップ部２ａ，２ａは、作業者がそのグリップ部２ａ，２ａを楽に手で握れるように適宜高さに設定する。なお、図例ではグリップ部２ａ，２ａを左右に分かれた構成としているが、操縦ハンドル２の左右の後端部を互いに左右に連結してその連結部分をグリップ部としても良い。
【００２１】
尚、上記走行装置１は、四輪構成としたものであるが、左右一対の駆動輪のみの２輪構成でもよいし、前輪の替わりに畝上面を転動する鎮圧輪としてもよい。また、クローラー式の走行装置としてもよい。
次に、リンク機構３及び苗植付け具４について説明する。
【００２２】
リンク機構３は、ミッションケース８内から苗植付け具駆動用の動力を受けて伝動する伝動機構を内装する植付け伝動ケース１８に装着している。図例のように植付け伝動ケース１８は、その前部がミッションケース８の後部に連結しそこから後斜め上方に延びる第一ケース部１８ａと、この第一ケース部１８ａの上部左側部に固定され左側方に延びる第二ケース部１８ｂと、その第二ケース部１８ｂの左端部に固定され後斜め下方に延びる第三ケース部１８ｃと、その第三ケース部１８ｃの下端部外側部に固定され左側方に延びる第四ケース部１８ｄと、その第四ケース部１８ｄの左端部に固定され後方水平状に延びる第五ケース部１８ｅを有するものとしている。これら第一ケース部１８ａ〜第五ケース部１８ｅ内にリンク機構３を昇降駆動するための動力を伝達する伝動機構を内装している。なお、第一ケース部１８ａ内に内装した伝動機構には、リンク機構３及び苗植付け具４をその昇降動最上位の位置で或はその近傍位置で設定時間停止させる間欠駆動機構と、リンク機構３及び苗植付け具４の昇降動を停止させるクラッチ機構とを備える。間欠駆動機構によって停止する時間は、該間欠駆動機構が備える変速機構によって調節され、この調節によって苗植付け具４による苗植付株間が変更調節されるようになっている。
【００２３】
そして、リンク機構３は、苗植付け具４の前側の開閉支点となる軸１９の左右中間部に回動自在に連結する第一昇降アーム２０と、苗植付け具４の後側の開閉支点となる軸２１の左側部に回動自在に連結する第二昇降アーム２２とを備える。そして、第一昇降アーム２０の後端部は、第三ケース部１８ｃの上部側後部に突出する取付部に揺動自在に取り付けた第一揺動アーム２３の下端部と回動自在に連結し、第二昇降アーム２２の後端部は、第五ケース部１８ｅの上部に突出する取付部に揺動自在に取り付けた第二揺動アーム２４の下端部と回動自在に連結する。また、第一昇降アーム２０の中間部は、第三ケース部１８ｃの下部右側部から突出し駆動回転する第一駆動軸２５に固定されて駆動回転する第一駆動アーム２６の先端部と回動自在に連結し、第二昇降アーム２２の中間部は、第五ケース部１８ｃの後部右側部から突出し駆動回転する第二駆動軸２７に固定されて駆動回転する第二駆動アーム２８の先端部と回動自在に連結する。従って、第一駆動アーム２６と第二駆動アーム２８とが植付け伝動ケース１８内の伝動機構によって動力が伝達されて駆動回転すると、第一昇降アーム２０と第二昇降アーム２２とが揺動しながら昇降動し、その結果、苗植付け具４の下端部が側面視で上下に長い略楕円形状の軌跡Ｔで昇降動する。また、第一駆動アーム２６と第二駆動アーム２８とは、共に、左側方から見て反時計回りに回転して苗植付け具４の下端部が左側方から見て反時計回りに略楕円形状の軌跡Ｔで昇降回動する。従って、作業走行しながら苗植付け具４が上記回転方向で前記軌跡Ｔを描くように昇降回動すると、軌跡Ｔの下端部で苗植付け具４の下端部が圃場の畝Ｕの土壌中に付き刺さったとき、苗植付け具４が畝Ｕに対して前後に大きくずれないようになり、前後に大きく植え跡を残さずに適確な姿勢で苗を植付けることができる。なお、くちばし状の苗植付け具４は、その昇降動最下位まで下降すると前後に開いて苗植付け具４内の苗を畝Ｕの土壌に放出する。
【００２４】
苗植付け具４は、下方に向かって延びるくちばし状に形成したもので前後に開閉可能に構成している。このくちばし状部の前側部分である前側くちばし部４Ｆは、その上部側が後方にアーム状にのびてその先端部が苗植付け具４の後側の開閉支点となる軸２１に回動自在に連結し、くちばし状部の後側部分である後側くちばし部４Ｂは、その上部側が前方にアーム状にのびてその先端部が苗植付け具４の前側の開閉支点となる軸１９に回動自在に連結する。そして、前側くちばし部４Ｆ上部の後方にのびるアーム状部と後側くちばし部４Ｂ上部の前方にのびるアーム状部とは、それぞれ前側の軸１９と後側の軸２１との前後中央位置に設けた長孔に横軸方向の軸部を有するナット２９を嵌めて連結し、前側くちばし部４Ｆと後側くちばし部４Ｂの一方側は他方側の動作に連動して回動し両者が前後に開閉動作するようになっている。また、前側くちばし部４Ｆと後側くちばし部４Ｂとはスプリング３０にて苗植付け具４を閉じる方向互いに連結している。更に、第二昇降アーム２２と第二揺動アーム２４とが互いに連結する軸部分に、苗植付け具４を開閉動作させるための開閉アーム３１を回動自在に連結し、その開閉アーム３１の先端部と後側くちばし部４Ｂの上部後部側とを連結ロッド３２で連結している。開閉アーム３１の中間部には、回転自在なローラ３３を取付けていて、このローラ３３が、苗植付け具４がその昇降動最下位まで下降したときに、第二昇降アーム２２を回動自在に連結している第二駆動アーム２８の先端部に固定の軸２８ａに固定したカム３４の作用によって上方に押上げられて開閉アーム３１が上方に回動し、後側くちばし部４Ｂを前側の回動支点である軸１９周りに上方回動し、これとともに前側くちばし部４Ｆを後側の回動支点である軸２１周りに上方回動して、苗植付け具４が開く。そして、苗植付け具４が上昇途中でカム３４の開き作用から開放され苗植付け具４が閉じる。なお、上記のカム３４、開閉アーム３１、連結ロッド３２等は、苗植付け具４の開閉機構を構成するが、公知の別の開閉機構を採用してもよい。
【００２５】
苗植付け具４の上部には、苗植付け具４内に苗を案内する筒状の案内体３５を取り付けている。この案内体３５は、苗植付け具４の開閉支点となる軸１９，２１より上方に突出させて設けるとともに、案内体３５の上端開口部３５ａが苗植付け具４が最上位に位置するときに操縦ハンドル２のグリップ部２ａ，２ａの上下位置と同じ上下位置或はその近傍に位置するように設けて、作業者が該案内体３５の上端開口部３５ａ内に直接苗を投入して苗植付け具４に苗を供給する構成としている。
【００２６】
また、筒状の案内体３５の上端開口部３５ａを下端開口部３５ｂより広く設けるとともに、該上端開口部３５ａが機体平面視で案内体３５の下部外周近傍に配置した苗植付け具４と前記リンク機構３との連結部（図例では、苗植付け具４の前側の開閉支点となる軸１９と第一昇降アーム２０との連結部、及び苗植付け具４の後側の開閉支点となる軸２１と第二昇降アーム２２との連結部）の上方に重なるように設けている。また、苗植付け具４の開閉機構を構成する動作部材（図例では、カム３４、開閉アーム３１、連結ロッド３２等）の上方にも重なるように設けている。案内体３５の下部は、苗植付け具４の開閉支点となる軸１９，２１の前後間を上下に位置するように設けていて、ここで、該軸１９，２１に取り付けた支持部材にて該案内体３５の下部を支持している。
【００２７】
更に、苗植付け具４が最上位に位置するとき苗植付け具４とリンク機構３との連結部の少なくとも側方を覆うガード体３６を設け、該ガード体３６の上端部より前記案内体３５が上方に突出するように設けている。尚、ガード体３６は、図例では、苗植付け具４が最上位に位置するとき苗植付け具４とリンク機構３との連結部の側方だけでなく後方も覆うように構成している。
【００２８】
従って、上記構成の苗移植機は、作業走行中、開閉可能なくちばし状の苗植付け具４が昇降駆動するリンク機構３によって昇降動作して苗植付け具４内に供給された苗を圃場に植付けていく。苗植付け具４内への苗の供給は、苗植付け具４の上部に設けた筒状の案内体３５の上端開口部３５ａ内に作業者が直接苗を投入し、その投入された苗が案内体３５により案内されて苗植付け具４内に落下していって、苗植付け具４内に苗が供給される。
【００２９】
そして、案内体３５が、苗植付け具４の開閉支点１９，２１より上方に突出し、しかも、苗植付け具４が最上位に位置するとき、案内体３５の上端開口部３５ａが操縦ハンドル２のグリップ部２ａ，２ａの上下位置近傍に位置する。
また、筒状の案内体３５の上端開口部３５ａが、下端開口部３５ｂより広く、且つ、機体平面視で案内体３５の下部外周近傍に配置した苗植付け具４とリンク機構３との連結部の上方に重なる。
【００３０】
更に、ガード体３６が、苗植付け具４が最上位に位置するとき苗植付け具４とリンク機構３との連結部の少なくとも側方を覆う。しかし、案内体３５は、ガード体３６の上端部より上方に突出する。
従って、作業者は苗植付け具４の上部に設けた筒状の案内体３５の上端開口部３５ａ内に直接苗を投入して苗植付け具４に苗を供給するものとなり、よって、茎葉部が長い苗や重量が軽い裸苗の場合でも、従来のように苗が引っかかって苗植付け具に適確に落下しないというようなことは生じにくくなり、苗の種類や形状、大きさ等が相違しても適確に移植できるものとなる。しかも、案内体３５の上端開口部３５ａが苗植付け具４が最上位に位置するときに操縦ハンドル２のグリップ部２ａ，２ａの上下位置近傍に位置するので、作業者が案内体に苗を投入するとき案内体の上端開口部が適当な高さに位置することになって、苗の投入が容易且つ適確に行え作業が能率よく行える。
【００３１】
更に、筒状の案内体３５の上端開口部３５ａが、下端開口部３５ｂより広く、且つ、機体平面視で案内体３５の下部外周近傍に配置した苗植付け具４とリンク機構３との連結部の上方に重なるので、案内体３５の上端開口部３５ａ内への苗の投入が容易に行え、また、苗を案内体３５内に投入するときに、昇降動する苗植付け具４及びリンク機構３に手などが上方から接触してしまうことが生じにくくなり作業が安全に行える。
【００３２】
また、畝間の谷部を歩行しながら苗供給作業を行う作業者は機体側方位置することになるが、苗植付け具４が最上位に位置するとき苗植付け具４とリンク機構３との連結部の少なくとも側方を覆うガード体３６を設けているので、苗を案内体３５内に投入するときに、昇降動する苗植付け具４及びリンク機構３に手などが側方から接触してしまうことが生じにくくなり作業が安全に行え、しかも、案内体３５はガード体３６の上端部より上方に突出するので、ガード体３６を設けながらも苗を案内体３５内に投入する作業は容易に行えるものとなる。
【００３３】
尚、図中、符合３７は苗を予備的に置いておくための苗台を示し、３８は苗植付け具４によって畝Ｕに植付けられた苗に対し左右から覆土し鎮圧する転動自在な輪体で構成した覆土装置を示す。
【図面の簡単な説明】
【図１】苗移植機の側面図。
【図２】苗移植機の平面図。
【図３】苗移植機の要部の側面図。
【図４】苗移植機の要部の平面図。
【図５】苗植付け具が開いた状態を示す側面図。
【符号の説明】
１：走行装置
２：操縦ハンドル
２ａ，２ａ：グリップ部
３：リンク機構
４：苗植付け具
３５：案内体
３６：ガード体[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of field seedling transplanters.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a walking type seedling transplanter provided with an openable / closable beak-shaped seedling planting tool, a traveling device, and a steering handle, which are connected to a link mechanism that drives up and down, a plurality of cups that store seedlings are provided. When the prepared turntable is placed above the seedling planting tool, when the seedling planting tool rises, the bottom lid of the cup of the turntable opens and the seedling stored in the cup falls and the seedling is supplied to the seedling planting tool The configuration was
[0003]
[Problems to be solved by the invention]
By the way, there are various shapes and sizes of seedlings transplanted in the field. There are large seedlings and small seedlings, and some seedlings with widened leaves and some seedlings that are elongated. Furthermore, some seedlings with soil, such as cell-molded seedlings, are so-called bare seedlings with no block-like soil attached to the roots. The conventional seedling transplanting machine as described above can cope with the difference in shape and size of seedlings to some extent. For example, in the case of a seedling with a long foliage or a bare seedling with a light weight, the bottom cover of the cup When the seedlings are opened and the seedlings are supplied to the seedling planting tool, the seedlings may get caught in a cup or the like and may not fall properly onto the seedling planting tool, resulting in poor planting. Then, this invention makes it a subject to obtain the seedling transplanting machine which can transplant correctly even if the kind, shape, size, etc. of seedlings differ.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention has the following configuration.
The invention according to claim 1 is an ambulatory seedling transplanting machine comprising an openable / closable beak-shaped seedling planting tool that is connected to a link mechanism that is driven to move up and down, a traveling device, and a steering handle. A cylindrical guide for guiding the seedling into the seedling planting tool is provided above the seedling planting tool so as to protrude upward from the opening / closing fulcrum of the seedling planting tool, and the upper end opening of the guide body is at the top of the seedling planting tool. It provided so as to be positioned near the vertical position of the grip portion of the steering wheel when positioned in the upper, the degree to which the operator can supply the seedlings to the seedling planting device by directly seedlings charged into the top opening of the guide body The upper end opening of the cylindrical guide body is provided wider than the lower end opening, and the upper end opening of the connecting part between the seedling planting tool and the link mechanism arranged near the lower outer periphery of the guide body in plan view of the machine body Provided to overlap When the seedling planting tool is positioned at the uppermost position, a guard body is provided to cover the side and rear of the connecting portion between the seedling planting tool and the link mechanism, and the guide body projects upward from the upper end of the guard body. The seedling transplanting machine is characterized by being provided .
[0005]
[0006]
[0007]
[Action]
The seedling transplanting machine according to the present invention moves up and down by a link mechanism in which a beak-shaped seedling planting tool that can be opened and closed is driven to move up and down, and transplants the seedling supplied in the seedling planting tool to a farm field. The seedlings are supplied into the seedling planting tool by the operator directly feeding the seedlings into the upper end opening of the cylindrical guide provided at the top of the seedling planting tool. The seedling is dropped into the seedling planting tool, and the seedling is supplied into the seedling planting tool.
[0008]
In the first aspect of the invention, when the guide body projects upward from the opening / closing fulcrum of the seedling planting tool and the seedling planting tool is located at the uppermost position, the upper end opening of the guide body is the grip part of the steering handle. It is located near the vertical position.
Further , the upper end opening of the cylindrical guide body is wider than the lower end opening and overlaps above the connecting portion between the seedling planting tool and the link mechanism arranged in the vicinity of the lower outer periphery of the guide body in plan view.
[0009]
Furthermore , a guard body covers the side part and the back of the connection part of a seedling planting tool and the said link mechanism, when a seedling planting tool is located in the highest level. However, the guide body projects upward from the upper end portion of the guard body.
[0010]
【The invention's effect】
According to the invention described in claim 1, the operator directly feeds the seedling into the upper end opening of the cylindrical guide provided at the top of the seedling planting tool and supplies the seedling to the seedling planting tool. Even in the case of long seedlings or light-weight bare seedlings, it is unlikely that the seedlings will get caught and fall properly onto the seedling planting tool as in the past, and the seedling type, shape, size, etc. will be different. Even then, it can be transplanted properly. Moreover, since the upper end opening of the guide body is located near the vertical position of the grip portion of the steering handle when the seedling planting tool is located at the uppermost position, the upper end opening of the guide body when the operator puts the seedling into the guide body Since the part is positioned at an appropriate height, seedlings can be easily and accurately put in and work can be performed efficiently.
[0011]
Furthermore , the upper end opening of the cylindrical guide body is wider than the lower end opening and overlaps above the connecting portion between the seedling planting tool and the link mechanism arranged in the vicinity of the lower outer periphery of the guide body in plan view. The seedling can be easily put into the upper end opening of the guide body, and when the seedling is put into the guide body, the hand or the like may come into contact with the seedling planting tool and the link mechanism that move up and down. It is less likely to occur and work can be performed safely.
[0012]
In addition , the worker who performs the seedling supply work while walking in the valley part of the furrow is located on the side of the aircraft, but when the seedling planting tool is located at the top, the connection part of the seedling planting tool and the link mechanism Since the guard body covering the side and the rear is provided, when the seedling is put into the guide body, it is difficult for the hand etc. to come into contact with the seedling planting tool and the link mechanism that move up and down from the side and the rear. Therefore, since the guide body projects upward from the upper end of the guard body, the work of putting the seedling into the guide body can be easily performed while the guard body is provided.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
A seedling transplanter as an embodiment of the present invention will be described below. In the following description of the illustrated example, when referring to the front or the rear, the side on which the steering handle 2 is disposed is referred to as the rear, and the opposite side, that is, the side on which the engine 5 is disposed is referred to as the front. When the term “right” or “left” is used, the right hand side is referred to as the right and the left hand side is referred to as the left when viewed from an operator standing at the front of the body at the rear of the body.
[0014]
The seedling transplanting machine is configured to include a beak-like seedling planting tool 4 that can be opened and closed connected to a link mechanism 3 that is driven to move up and down on a machine body that includes a traveling device 1 and a steering handle 2.
In the illustrated example, the traveling device 1 includes an engine 5, a pair of left and right rear wheels 6 and 6 that are driven and rotated by transmission of the power of the engine 5, and left and right wheels that are rotatably supported in front of the wheels 6 and 6. A pair of front wheels 7 and 7 is provided.
[0015]
A mission case 8 is disposed at the rear of the engine 5, and the mission case 8 has a case portion extending from the left side of the engine 5 to the left side of the engine 5, and this is connected to the left side of the engine 5. The output shaft of the engine 5 enters the case portion and the power is transmitted to the transmission mechanism in the transmission case 8. The transmission cases 9 and 9 are rotatably attached to the left and right sides of the transmission case 8, and the tip ends of the wheel drive shafts extending from the transmission case 8 to the left and right outer sides at the rotation centers of the transmission cases 9 and 9. The power for traveling is transmitted to the transmission mechanism in the transmission cases 9, 9. The driving power is transmitted to the axles 10 and 10 which extend to the rear side of the machine body and protrude to the side of the rear end side via the transmission mechanism in the transmission cases 9 and 9, and the rear wheels 6 and 6 are driven to rotate. It is supposed to be.
[0016]
Also, upwardly extending arms 11, 11 are integrally attached to the attachment parts of the transmission cases 9, 9 to the transmission case 8, and this is the tip of the piston rod of the lifting hydraulic cylinder 12 fixed to the transmission case 8. Are connected to the left and right sides of a balance rod 13 that is pivotably mounted around a vertical axis. The right side of the connecting portion is connected by a rod 14, and the left side is connected by a left / right horizontal control hydraulic cylinder 15 which can be expanded and contracted.
[0017]
When the lifting / lowering hydraulic cylinder 12 is actuated and the piston rod projects rearward, the left and right arms 11 and 11 are rotated rearward, and accordingly the transmission cases 9 and 9 are rotated downward, and the airframe. Rises. On the contrary, when the piston rod of the elevating hydraulic cylinder 12 is retracted forward, the left and right arms 11 and 11 are rotated forward, and accordingly the transmission cases 9 and 9 are rotated upward so that the aircraft is Descend. The elevating hydraulic cylinder 12 is configured to operate the airframe to be a set height with respect to the height of the heel surface based on the detection result of the sensor S that detects the height of the heel surface with respect to the airframe. It is also configured to operate so as to raise or lower the airframe by manual operation of an operating tool disposed in the vicinity of the steering handle 2.
[0018]
Further, when the left / right horizontal control hydraulic cylinder 15 expands / contracts, the balance rod 13 rotates around the vertical axis connected to the tip of the piston rod of the lifting hydraulic cylinder 12 at the center of the left / right to transmit left / right transmission. Cases 9 and 9 are moved up and down alternately to incline the aircraft from side to side. The left / right horizontal control hydraulic cylinder 15 is configured to operate so that the airframe is horizontally horizontal based on a detection result of a sensor that detects the right / left inclination of the airframe relative to the left / right horizontal.
[0019]
The left and right front wheels 7 and 7 are fixed to the side of the lower end portion of the arm portion extending below the left and right side portions of the front wheel support frame 16 attached to the left and right central positions below the engine 5 so as to be rotatable around the front and rear axis. It is attached to the axles 17 and 17 rotatably. Accordingly, the left and right front wheels 7 and 7 are capable of rolling around the longitudinal center of the left and right center of the aircraft.
[0020]
The steering handle 2 is attached to a rear end portion of a body frame 2b having a front end portion fixed to the mission case 8. The airframe frame 2b is disposed at a position deviated from the right and left center of the airframe to the right side and extends rearward, and extends obliquely rearward and upward from the front and rear intermediate portion. The steering handle 2 extends rearward from the rear end portion of the body frame 2b to the left and right, and the rear end portions thereof serve as grip portions 2a and 2a of the steering handle 2. The left and right grip portions 2a, 2a of the steering handle 2 are set to an appropriate height so that the operator can easily grip the grip portions 2a, 2a with hands. In the example shown in the figure, the grip portions 2a, 2a are divided into left and right, but the left and right rear end portions of the steering handle 2 may be connected to each other left and right, and the connecting portion may be used as the grip portion.
[0021]
Although the traveling device 1 has a four-wheel configuration, the traveling device 1 may have a two-wheel configuration including only a pair of left and right drive wheels, or may be a pressure-reducing wheel that rolls on the upper surface instead of the front wheels. Moreover, it is good also as a crawler type traveling apparatus.
Next, the link mechanism 3 and the seedling planting tool 4 will be described.
[0022]
The link mechanism 3 is attached to a planting transmission case 18 that includes a transmission mechanism that receives power for driving a seedling planting tool from the mission case 8 and transmits it. As shown in the figure, the planting transmission case 18 is fixed to the first case portion 18a whose front portion is connected to the rear portion of the mission case 8 and extends rearward and obliquely upward therefrom, and the upper left portion of the first case portion 18a. A second case portion 18b that extends to the left side, a third case portion 18c that is fixed to the left end portion of the second case portion 18b and extends obliquely downward, and a left side that is fixed to the outer side of the lower end portion of the third case portion 18c. A fourth case portion 18d extending in the direction and a fifth case portion 18e that is fixed to the left end portion of the fourth case portion 18d and extends horizontally in the rearward direction are provided. The first case portion 18a to the fifth case portion 18e have a transmission mechanism that transmits power for driving the link mechanism 3 up and down. The transmission mechanism incorporated in the first case portion 18a includes an intermittent drive mechanism that stops the link mechanism 3 and the seedling planting tool 4 at the uppermost position of the raising / lowering position or a position near the upper and lower movement positions, and the link mechanism. 3 and a clutch mechanism for stopping the raising and lowering movement of the seedling planting tool 4. The time for stopping by the intermittent drive mechanism is adjusted by a speed change mechanism provided in the intermittent drive mechanism, and the adjustment between the seedling planting stocks by the seedling planting tool 4 is adjusted by this adjustment.
[0023]
The link mechanism 3 serves as a first lifting arm 20 that is pivotally connected to the left and right intermediate portion of the shaft 19 that is a front opening / closing fulcrum of the seedling planting tool 4 and a rear opening / closing fulcrum of the seedling planting tool 4. A second lifting arm 22 rotatably connected to the left side of the shaft 21; The rear end portion of the first lifting arm 20 is rotatably connected to the lower end portion of the first swing arm 23 that is swingably attached to an attachment portion that protrudes from the upper rear portion of the third case portion 18c. The rear end portion of the second elevating arm 22 is rotatably connected to the lower end portion of the second swing arm 24 that is swingably attached to an attachment portion that protrudes from the upper portion of the fifth case portion 18e. Further, the intermediate portion of the first lifting arm 20 protrudes from the lower right side portion of the third case portion 18c and is fixed to the first drive shaft 25 that is driven and rotated, and is freely rotatable with the distal end portion of the first drive arm 26 that is driven and rotated. The intermediate portion of the second elevating arm 22 protrudes from the right side of the rear portion of the fifth case portion 18c and is fixed to the second drive shaft 27 that is driven and rotated. Connect freely. Therefore, when the first drive arm 26 and the second drive arm 28 are driven and rotated by the power transmitted by the transmission mechanism in the planting transmission case 18, the first lift arm 20 and the second lift arm 22 are swung. As a result, the lower end portion of the seedling planting tool 4 moves up and down along a substantially elliptical trajectory T that is vertically long in a side view. The first drive arm 26 and the second drive arm 28 both rotate counterclockwise when viewed from the left side, and the lower end portion of the seedling planting tool 4 is substantially elliptical when viewed from the left side. It moves up and down on the locus T. Accordingly, when the seedling planting tool 4 is moved up and down so as to draw the locus T in the above rotation direction while traveling, the lower end portion of the seedling planting tool 4 is attached to the soil of the straw U in the field at the lower end portion of the locus T. When stabbed, the seedling planting tool 4 does not largely shift back and forth with respect to the ridge U, and the seedling can be planted in an appropriate posture without leaving a large planting mark in the front and back. In addition, when the beak-shaped seedling planting tool 4 descends to the lowest movement, the beak-shaped seedling planting tool 4 opens back and forth and releases the seedlings in the seedling planting tool 4 to the soil of the ridge U.
[0024]
The seedling planting tool 4 is formed in a beak shape extending downward and is configured to be openable and closable forward and backward. The front beak portion 4F, which is the front side portion of the beak-like portion, is pivotably connected to a shaft 21 whose upper side extends in the shape of an arm rearward and whose tip is an opening / closing fulcrum on the rear side of the seedling planting tool 4. The rear beak portion 4B, which is the rear portion of the beak-shaped portion, is pivotably connected to a shaft 19 whose upper portion extends forward in the shape of an arm and whose tip is an opening / closing fulcrum on the front side of the seedling planting tool 4. To do. The arm-like portion extending rearward of the upper portion of the front beak portion 4F and the arm-like portion extending frontward of the upper portion of the rear beak portion 4B are provided at the front and rear central positions of the front shaft 19 and the rear shaft 21, respectively. A nut 29 having a shaft portion in the horizontal axis direction is fitted and connected to the long hole, and one side of the front beak portion 4F and the rear beak portion 4B is rotated in conjunction with the operation of the other side, and both of them open and close back and forth. It is supposed to be. Further, the front beak portion 4F and the rear beak portion 4B are connected to each other in a direction in which the seedling planting tool 4 is closed by a spring 30. Further, an opening / closing arm 31 for opening and closing the seedling planting tool 4 is rotatably connected to a shaft portion where the second lifting arm 22 and the second swing arm 24 are connected to each other. The connecting rod 32 connects the part and the upper rear side of the rear beak part 4B. A rotatable roller 33 is attached to an intermediate portion of the opening / closing arm 31, and this roller 33 can rotate the second lifting arm 22 when the seedling planting tool 4 is lowered to its lowest movement. The cam 34 fixed to the fixed shaft 28a is pushed upward by the action of the cam 34 fixed to the distal end portion of the connected second drive arm 28, so that the opening / closing arm 31 is rotated upward, and the rear beak portion 4B is rotated forward. The seedling planting tool 4 is opened by rotating upward around the shaft 19 that is a moving fulcrum and simultaneously rotating the front beak portion 4F around the shaft 21 that is a rotating fulcrum on the rear side. Then, the seedling planting tool 4 is released from the opening action of the cam 34 while the seedling planting tool 4 is rising, and the seedling planting tool 4 is closed. The cam 34, the opening / closing arm 31, the connecting rod 32 and the like constitute an opening / closing mechanism of the seedling planting tool 4, but another known opening / closing mechanism may be employed.
[0025]
A cylindrical guide body 35 that guides the seedling in the seedling planting tool 4 is attached to the upper part of the seedling planting tool 4. The guide body 35 is provided so as to protrude above the shafts 19 and 21 that are the opening and closing fulcrums of the seedling planting tool 4, and the upper end opening 35a of the guide body 35 is operated when the seedling planting tool 4 is positioned at the uppermost position. The handle 2 is provided so as to be located at the same vertical position as or near the vertical position of the grip portions 2a, 2a of the handle 2, and the operator directly puts the seedling into the upper end opening 35a of the guide body 35 so as to plant the seedling. 4 is configured to supply seedlings.
[0026]
Further, the upper end opening 35a of the cylindrical guide body 35 is provided wider than the lower end opening 35b, and the upper end opening 35a is disposed in the vicinity of the lower outer periphery of the guide body 35 in plan view of the machine body and the link. Connecting portion with the mechanism 3 (in the illustrated example, the connecting portion between the shaft 19 serving as the opening / closing fulcrum on the front side of the seedling planting tool 4 and the first lifting arm 20 and the shaft 21 serving as the opening / closing fulcrum on the rear side of the seedling planting device 4. And the second elevating arm 22). Moreover, it is provided so that it may also overlap over the operation members (the cam 34, the opening / closing arm 31, the connecting rod 32, etc. in the example) which comprise the opening / closing mechanism of the seedling planting tool 4. The lower part of the guide body 35 is provided so that the front and rear of the shafts 19 and 21 which are the opening and closing fulcrums of the seedling planting tool 4 are vertically positioned. Here, the supporting members attached to the shafts 19 and 21 The lower part of the guide body 35 is supported.
[0027]
Furthermore, when the seedling planting tool 4 is positioned at the uppermost position, a guard body 36 that covers at least the side of the connecting portion between the seedling planting tool 4 and the link mechanism 3 is provided, and the guide body 35 is provided from the upper end of the guard body 36. It is provided so as to protrude upward. In the illustrated example, the guard body 36 is configured to cover not only the side of the connecting portion between the seedling planting tool 4 and the link mechanism 3 but also the back when the seedling planting tool 4 is positioned at the uppermost position.
[0028]
Therefore, the seedling transplanting machine having the above-described configuration transplants the seedling supplied to the seedling planting tool 4 by moving up and down by the link mechanism 3 driven by the beak-shaped seedling planting tool 4 that can be opened and closed during operation. To go. The seedlings are supplied into the seedling planting tool 4 by the operator directly feeding the seedlings into the upper end opening 35a of the cylindrical guide 35 provided on the upper part of the seedling planting tool 4 Guided by the body 35 and falling into the seedling planting tool 4, the seedling is supplied into the seedling planting tool 4.
[0029]
When the guide body 35 protrudes upward from the open / close fulcrums 19 and 21 of the seedling planting tool 4 and the seedling planting tool 4 is positioned at the uppermost position, the upper end opening 35a of the guide body 35 grips the steering handle 2. It is located in the vicinity of the vertical position of the parts 2a, 2a.
Moreover, the connection part of the seedling planting tool 4 and the link mechanism 3 which the upper end opening part 35a of the cylindrical guide 35 was wider than the lower end opening part 35b, and was arrange | positioned in the lower outer periphery vicinity of the guide body 35 by plane view of an airframe. It overlaps above.
[0030]
Furthermore, the guard body 36 covers at least the side of the connecting portion between the seedling planting tool 4 and the link mechanism 3 when the seedling planting tool 4 is positioned at the uppermost position. However, the guide body 35 protrudes upward from the upper end portion of the guard body 36.
Accordingly, the operator directly feeds the seedlings into the upper end opening 35a of the cylindrical guide 35 provided on the upper part of the seedling planting tool 4 and supplies the seedlings to the seedling planting tool 4. Even in the case of long seedlings or bare seedlings that are light in weight, it is unlikely that seedlings will get caught and fall properly onto the seedling planting tool as in the past, and the seedling type, shape, size, etc. will be different. However, it can be transplanted properly. Moreover, since the upper end opening 35a of the guide body 35 is located near the vertical position of the grip portions 2a, 2a of the steering handle 2 when the seedling planting tool 4 is located at the uppermost position, the operator throws seedlings into the guide body. In this case, the upper end opening of the guide body is positioned at an appropriate height, so that the seedling can be easily and accurately put in and the work can be performed efficiently.
[0031]
Furthermore, the upper end opening 35a of the cylindrical guide body 35 is wider than the lower end opening 35b, and the connecting portion between the seedling planting tool 4 and the link mechanism 3 disposed near the lower outer periphery of the guide body 35 in plan view. The seedling planting tool 4 and the link mechanism 3 that move up and down when the seedling is put into the guide body 35 can be easily put into the upper end opening 35a of the guide body 35. Therefore, it is difficult for a hand to come into contact with the hand from above, and the work can be performed safely.
[0032]
In addition, an operator who performs seedling supply work while walking in the valley of the furrow is located on the side of the machine body, but when the seedling planting tool 4 is positioned at the highest position, the seedling planting tool 4 and the link mechanism 3 are connected. Since the guard body 36 that covers at least the side of the part is provided, when the seedling is put into the guide body 35, the hand or the like comes into contact with the seedling planting tool 4 and the link mechanism 3 that move up and down from the side. Since the guide body 35 protrudes above the upper end of the guard body 36, it is easy to throw seedlings into the guide body 35 while the guard body 36 is provided. It can be done.
[0033]
In the figure, reference numeral 37 denotes a seedling stand for preliminarily placing seedlings, and 38 denotes a rollable wheel that covers and suppresses the seedlings planted on the ridge U by the seedling planting tool 4 from the left and right. The soil covering apparatus comprised with the body is shown.
[Brief description of the drawings]
FIG. 1 is a side view of a seedling transplanter.
FIG. 2 is a plan view of a seedling transplanter.
FIG. 3 is a side view of a main part of a seedling transplanter.
FIG. 4 is a plan view of the main part of a seedling transplanter.
FIG. 5 is a side view showing a state where a seedling planting tool is opened.
[Explanation of symbols]
1: Traveling device 2: Steering handle 2a, 2a: Grip part 3: Link mechanism 4: Seedling planting tool 35: Guide body 36: Guard body

Claims

In a walking type seedling transplanter equipped with an openable / closable beak-shaped seedling planting device that is connected to a link mechanism that is driven to move up and down, a traveling device, and a steering handle, the seedling is guided into the seedling planting device. A cylindrical guide body that protrudes above the open / close fulcrum of the seedling planting tool and is provided at the upper part of the seedling planting tool, and the upper end opening of the guide body is operated when the seedling planting tool is positioned at the uppermost position. It is provided so as to be positioned in the vicinity of the vertical position of the grip part of the handle so that the operator can directly feed the seedling into the upper end opening of the guide body and supply the seedling planting tool to the seedling planting tool . The upper end opening is provided wider than the lower end opening, and the upper end opening is provided so as to overlap above the connecting part between the seedling planting tool and the link mechanism arranged in the vicinity of the lower outer periphery of the guide body in plan view. The planting tool is at the top A guard for covering the side and rear of the connecting portion of the planting member and the link mechanism is provided when location, said guide member upper end portion of the guard member is characterized in that arranged so as to project upward Seedling transplanter .