JP3746037B2

JP3746037B2 - Spare seedling mounting structure for riding rice transplanter

Info

Publication number: JP3746037B2
Application number: JP2002353046A
Authority: JP
Inventors: 祐一加藤
Original assignee: Yanma Agricultural Equipment Co Ltd
Current assignee: Yanma Agricultural Equipment Co Ltd
Priority date: 2002-12-04
Filing date: 2002-12-04
Publication date: 2006-02-15
Anticipated expiration: 2022-12-04
Also published as: JP2004180609A

Description

【０００１】
【発明の属する技術分野】
本発明は、乗用田植機における苗継用の予備苗を載置しておく予備苗載台の取り付け構造に関する。とくに、予備苗載台の乗用田植機の走行機体への取り付け構造に関するものである。
【０００２】
【従来の技術】
従来、予備苗載台を備えた乗用田植機おいては、下記特許文献１に開示されているように、予備苗載台に断面がおよそコの字形の位置規制具を取り付けるとともに、該位置規制具に設けられたフック部を、予備苗載台支柱に取り付けられた支軸に係合させ、さらに、乗用田植機側方に突出するように位置規制具に取り付けられた、スプリングの付勢力に抗うようにして引き操作可能なロッド利用の操作具を乗用田植機の外側向きへ操作することで、予備苗載台を、予備苗載台に搭載している場合の苗載置姿勢とほぼ鉛直下向きに畳んだ場合の格納姿勢とに切り替えることができるようにしたものがある。
【０００３】
このような予備苗載台取り付け構造とすることで、予備苗載台を予備苗載台支柱から取り外すことなくほぼ鉛直下向きに畳むことができるので、乗用田植機の幅寸法を減少することができ、乗用田植機をコンパクトに納屋などに格納可能であった。しかしながら、予備苗載台を苗載置姿勢と格納姿勢とに切り替えるためには、上記のとおり、スプリングの付勢力に抗うようにして引き操作可能なロッド利用の操作具を乗用田植機の外側向きへ操作しなければならない。また、運転座席から上記操作具の取り付け位置までは遠く、運転者が運転座席から上記操作具を乗用田植機の外側向きへ操作しようとすると、上半身を乗用田植機の外側へ投げ出す格好で操作しなければならなかった。従って運転者は、安全に予備苗載台を苗載置姿勢と格納姿勢とに切り替える際には、一端乗用田植機から降りて乗用田植機側方へ回り、上記操作具を乗用田植機の外側向きへ引くという操作しなければならず不便であった。
【特許文献１】
特開２００２−１５９２０８
【０００４】
【発明が解決しようとする課題】
そこで、本発明は、予備苗載台付き乗用田植機において、運転者が乗用田植機から降りることなく、予備苗載台の姿勢切り替えを可能にする乗用田植機の予備苗載台取り付け構造を提供することを課題とする。
【０００５】
【課題を解決するための手段】
本発明は上記課題の解決を図るため、次の手段を用いる。
即ち、走行機体後部に苗植付部を昇降自在に設けると共に、苗継用の予備苗を載置させる予備苗載台と、該予備苗載台を支持する予備苗載台支柱とを備え、予備苗載台が、走行機体に対し外側水平方向に突出する苗載置姿勢と、走行機体に対し外側鉛直方向に回動され格納姿勢とに揺動切り替え自在に構成した乗用田植機において、前記予備苗載台はその縁部から突出して形成される接続部と、前記予備苗載台支柱の柱部を嵌め受ける格納姿勢時嵌合部とを有し、前記予備苗載台支柱の柱部と前記予備苗載台の縁部から突出して形成される接続部とを圧接させて予備苗載台を苗載置姿勢に保持する保持機構を該乗用田植機の走行機体側に備え、該保持機構が、走行機体に対し前後方向に操作されることで、予備苗載台を苗載置姿勢に保持および保持解除自在であり、かつ格納時には、前記格納姿勢時嵌合部が前記柱部を嵌め受けることで固定されることを特徴とする乗用田植機の予備苗載台取り付け構造とする。
【０００６】
上記保持機構において、予備苗載台が、走行機体に対し前後方向にスライド操作されることで、該予備苗載台の苗載置姿勢における保持および保持解除が自在である乗用田植機の予備苗載台取り付け構造としてもよい。
【０００７】
【発明の実施の形態】
以下、本発明の実施形態を図面に示した実施例に基づいて説明するが、以下の具体例は本発明を限定するものではない。実施形態は、本発明の主旨から逸脱しない限り適宜設計変更可能なものである。
図１に、乗用田植機の概略側面図を、図２に、苗載置姿勢時における予備苗載台と予備苗載台支柱との位置関係を示す概略平面図を、図３に、苗載置姿勢時と格納姿勢時とに切り替える状態における予備苗載台と予備苗載台支柱との位置関係を示す概略平面図を、図４に、回動軸上の留め具部分を示す概略斜視図を、図５に、格納姿勢時おける予備苗載台と予備苗載台支柱との位置関係を示す概略正面図を、図６に、予備苗載台の概略斜視図を示す。
【０００８】
以下、本発明の実施の形態を図面に示す実施例を基に説明する。
図１は乗用田植機の概略側面図であり、まず、この乗用田植機全体について説明をする。作業者が搭乗する乗用田植機（Ａ）において、シャーシである車体フレーム（３）上に、前部には原動部であるエンジン（２）が搭載されるとともにエンジン（２）後方にはミッションケースが設けられ、ミッションケースの両側にフロントアクスルケースを介して水田走行用前輪（６）が支持されるとともに、リアアクスルケースを介して水田走行用後輪（８）が支持されている。また、エンジン（２）等を覆うボンネット（９）の両側には予備苗載台（５０）が取り付けられており、ミッションケース等はステップ（１１）を有する車体カバー（１２）によって被覆されている。そして、車体カバー（１２）の上部には運転座席（１３）が取り付けられ、その運転座席（１３）の前方に操向ハンドル（１４）が設けられている。なお、（１５）はクラッチ機構とブレーキ機構を操作するペダル、（１６）は施肥装置である。
以下においては、乗用田植機（Ａ）において、エンジン（２）、車体フレーム（３）、水田走行用前輪（６）、水田走行用後輪（８）、操向ハンドル（１４）などの走行機能の主要部によって構成される機体を走行機体という。
【０００９】
乗用田植機（Ａ）の走行機体後部には、例えば６条植え用の苗載台（２０）並びに複数の植付爪（２９）などを具備する植付部（１７）が昇降自在に設けられ、前高後低でおよそ矩形板状の前傾式苗載台（２０）は、下部ガイドレール（１８）及び上部ガイドレール（１９）を介して、中央及び左右の植付伝動ケース（２６）に対して左右往復摺動自在に支持されている。そして、苗載台（２０）の上面には、縦リブが所定間隔で配設されており、条を区分けするように上下方向に伸延されている。また、苗載台（２０）の下部側には、上下に平行に配設された駆動軸と従動軸に縦搬送ベルトを巻回して構成された縦搬送装置（２２）が各条ごとに配設されている。
【００１０】
また、一方向に等速回転するロータリーケース（２７）は、植付伝動ケース（２６）に支持され、ロータリーケース（２７）の回転軸芯を中心として対称となる位置に一対の植付爪ケース（２８）が配設されるとともに、その植付爪ケース（２８）の先端に植付爪（２９）が取り付けられている。そして、ミッションケースの後部から延出された駆動軸が植付伝動ケース（２６）に連動連結して、前記苗載台（２０）の左右往復動、縦搬送装置（２２）、ロータリーケース（２７）と植付爪ケース（２８）の各駆動を行うようになっている。
【００１１】
また、植付伝動ケース（２６）の前端にはローリング支点軸を介してヒッチブラケット（３１）が左右傾動自在に枢着されており、このヒッチブラケット（３１）に連結されているトップリンク（３２）及びロワーリンク（３３）を含む３点昇降リンク機構を用いて乗用田植機（Ａ）の走行機体後側に植付部（１７）を連結している。そして、この植付部（１７）を、乗用田植機（Ａ）の走行機体後部とロワーリンク（３３）との間に介設した油圧シリンダーの伸縮動作によって昇降するように構成している。また、植付伝動ケース（２６）の下方には、中央及び左右の植付用均等フロート（３５）（３６）が植付深さ調節リンク（３７）などを介して支持されており、植付部（１７）を降下させてフロート（３５）（３６）を着地させることにより、苗載台（２０）上の苗マットから取り出した苗の植付深さを設定するようになっている。
【００１２】
続いて、本発明の要所である、予備苗載台（５０）と予備苗載台支柱（５１）との取り付け構造について説述する。
乗用田植機（Ａ）の概略において説述したとおり、予備苗載台（５０）等はボンネット（９）の両側に設けられる。図１に示した予備苗載台（５０）の数は片側３枚で両側計６枚であるが、勿論この枚数に限定する理由はなく適宜変更してもよい。また、各予備苗載台（５０）の形状は、従来の如くおよそ矩形状とするが、適宜変更可能である。
以下の説明は特段の断りのない限り、各予備苗載台と予備苗載台支柱との取り付け構造について妥当するものである。
【００１３】
各予備苗載台(５０)は、これを支持する部材である予備苗載台支柱（５１）に取り付けられる。予備苗載台支柱（５１）の形状は、角棒型、丸棒型、門字（逆Ｕ字）型などがあるが、本発明においては、門字（逆Ｕ字）型形状としている。また、門字型予備苗載台支柱（５１）の断面形状についても特段の限定は無いが、本実施形態例では略円形とする。
【００１４】
予備苗載台支柱（５１）の乗用田植機（Ａ）の走行機体への取り付け方法については従来公知のものでよく、例えば、車体フレーム（３）に取付ステーなどを介してボルト締めで接続される。
【００１５】
予備苗載台（５０）は上記したとおりおよそ矩形状であるが、予備苗載台支柱（５１）に取り付けられる予備苗載台（５０）の縁部においては外側へ突出した接続部（５３）が設けられる。この接続部（５３）は予備苗載台（５０）と一体成形されるが、予備苗載台（５０）とは別個独立の部材として予備苗載台（５０）に取り付けられるものでもよい。この接続部（５０）には、後述する回動軸（５６）を貫挿するための貫通孔（５９）が設けられ、予備苗載台（５０）と予備苗載台支柱（５１）との取り付け位置において、１本の回動軸（５６）によって、予備苗載台支柱（５１）とともに、乗用田植機（Ａ）の走行機体に対しほぼ水平方向に回動軸（５６）によって貫挿される。このように構成することによって、予備苗載台（５０）は回動軸（５６）周りに回動自在となる。
【００１６】
本実施形態例では、予備苗載台支柱（５１）が門字型形状のため、予備苗載台（５０）は、乗用田植機（Ａ）の走行機体に対しほぼ鉛直方向に立設された予備苗載台支柱（５１）の柱部（５１ａ）に、図２、図３に示すように１つの予備苗載台（５０）当たり計２カ所で接続されることになる。
【００１７】
また、接続部（５３）には、断面円形状の予備苗載台支柱（５１）の柱部（５１ａ）の外周部およそ半分ほどを嵌め受けられる半円弧状の凹部である、苗載置姿勢時嵌合部（５３ａ）が設けられる。
【００１８】
予備苗載台（５０）には、予備苗載台支柱（５１）に取り付けられる予備苗載台（５０）の縁部から予備苗載台（５０）底部にかけて斜方向に、予備苗載台支柱（５１）の柱部（５１ａ）を嵌め受ける凹部である、格納姿勢時嵌合部（５２）が設けられる。
【００１９】
回動軸（５６）には、図２、図３に示すように、予備苗載台（５０）と予備苗載台支柱（５１）の柱部（５１ａ）との接続部分の少なくとも一方には、予備苗載台（５０）の接続部（５３）および予備苗載台支柱（５１）の柱部（５１ａ）を挟み込むようにして、少なくとも２つの留め具（５５ａ）（５５ｂ）が固設される。予備苗載台支柱（５１）の柱部（５１ａ）の乗用田植機（Ａ）の走行機体前方側に配される留め具（５５ａ）の乗用田植機（Ａ）の走行機体直前方および接続部（５３）の乗用田植機（Ａ）の走行機体後方側に配される留め具（５５ｂ）の乗用田植機（Ａ）の走行機体直後方には、それぞれクリップ（７０）が設けられる。このクリップ（７０）は、例えば図４に示すような形状であって、回動軸（５６）の軸方向に対して垂直方向に設けられた貫通孔（７１）に、クリップ（７０）の直線状部分を差し込む。このような構成とすることによって、回動軸（５６）が軸方向に滑動して外れてしまうことを防止できる。
【００２０】
他の接続箇所においては、本実施例では、接続部（５３）の乗用田植機（Ａ）の走行機体後方側に少なくとも１つの留め具（５５ｂ）が固設されるようにする。また、上記のとおり、留め具（５５ｂ）の乗用田植機（Ａ）の走行機体直後方にクリップ（７０）を設けてもよい。
留め具（５５ａ）（５５ｂ）の形状には格別の限定はないが、円形の平板状であることが好ましい。
【００２１】
さらに、回動軸（５６）には、接続部（５３）と接続部（５３）の乗用田植機（Ａ）の走行機体後方側に設けられた留め具（５５ｂ）間に、スプリング（５４）を設ける。スプリング（５４）の取り付け位置は、このような位置に取り付けることを限定するものではなく、例えば、適宜予備苗載台支柱（５１）の柱部（５１ａ）と、接続部（５３）の乗用田植機（Ａ）の走行機体前方側に設けられた留め具（５５ａ）とに挟まれた部分に設けるようにしてもよいのであるが、留め具（５５ｂ）の平板状部分と接続部（５３）の乗用田植機（Ａ）の走行機体後方側の平板状部分にスプリング（５４）を設けることで安定した作動が可能になる。
【００２２】
続いて、以上のような構成のもとで、予備苗載台（５０）の苗載置姿勢および格納姿勢での切り替え動作について概説する。
まず、予備苗を搭載した苗載置姿勢における予備苗載台（５０）は、ほぼ水平に位置しており、この状態で、スプリング（５４）の伸張力によって、予備苗載台（５０）の接続部（５３）は予備苗載台支柱（５１）の柱部（５１ａ）に圧接される（図２参照）。即ち、スプリング（５４）によって圧接されることによって、苗載置姿勢時嵌合部（５３ａ）が予備苗載台支柱（５１）の柱部（５１ａ）を嵌め受ける。このようにして、予備苗載台（５０）はほぼ水平に予備苗載台支柱（５１）に付勢され固定されるのである。苗載置姿勢時嵌合部（５３ａ）と予備苗載台支柱（５１）の柱部（５１ａ）とが接触し合う表面部分には、滑り止め加工を施すようにしてもよい。
【００２３】
なお、必ずしも予備苗載台（５０）の接続部（５３）には半円弧状の凹部を設けなければならないものではなく、予備苗載台支柱（５１）の柱部（５１ａ）の断面形状に適合すればよい。要は、予備苗載台（５０）がほぼ水平位置に付勢される際に保持可能であるために、凸部と凹部を、予備苗載台（５０）の接続部（５３）と予備苗載台支柱（５１）の柱部（５１ａ）に設け、さらに、スプリング（５４）によって圧接された際に、上記凹部と上記凸部が嵌合するようにすればよいのである。
【００２４】
上記のようにして、ほぼ水平に付勢された苗載置姿勢の予備苗載台（５０）を格納姿勢にするには、乗用田植機（Ａ）の運転者は、運転座席（１３）側から、腕を伸ばして予備苗載台（５０）の例えば縁部分に手を掛けて、予備苗載台（５０）を、本実施例においては、乗用田植機（Ａ）の走行機体後方へと引っ張るようにスライド操作する。すると、スプリング（５４）は圧縮されて、苗載置姿勢時嵌合部（５３ａ）と予備苗載台支柱（５１）の柱部（５１ａ）とは乖離し保持解除される（図３参照）。このような状態において、予備苗載台（５０）は回動軸（５６）周りに揺動自在となる。そこで、運転者は、予備苗載台（５０）を乗用田植機（Ａ）の走行機体に対して鉛直下向きへと動かす。予備苗載台（５０）自体の重さがあるので、運転者は大きな力を要することなく、予備苗載台（５０）を乗用田植機（Ａ）の走行機体に対して鉛直下向きへと動かすことが可能である。そして、乗用田植機（Ａ）の走行機体に対して鉛直下向きに動かされた予備苗載台（５０）は、格納姿勢時嵌合部（５２）に予備苗載台支柱（５１）の柱部（５１ａ）を嵌め受ける（図５参照）。即ち、格納姿勢時嵌合部（５２）を設けることによって、予備苗載台（５０）を格納姿勢にした際に、予備苗載台（５０）の底部の角が予備苗載台支柱（５１）に当たることを予防するとともに、格納姿勢になった場合の乗用田植機（Ａ）の幅寸法を少しでも減少させる効果を有する。
【００２５】
なお、以上のような予備苗載台（５０）の作動方法に鑑みれば、格納姿勢時嵌合部（５２）は、運転者が予備苗載台（５０）をスプリング（５４）のほぼ圧縮限界まで引っ張った状態で乗用田植機（Ａ）の走行機体に対して鉛直下向きに動かした場合に、予備苗載台支柱（５１）の柱部（５１ａ）が嵌め受けられる位置に設けるのが好ましい。なぜなら、このようにすることによって、運転者が逐一、予備苗載台（５０）と予備苗載台支柱（５１）との位置関係を確かめながら操作する煩わしさから解放されるからである。
【００２６】
格納姿勢から苗載置姿勢に姿勢切り替えするには、予備苗載台（５０）を乗用田植機（Ａ）の走行機体に対して鉛直下側の位置からほぼ水平位置に引き上げるだけでよい。即ち、予備苗載台（５０）を引き上げると、ほぼ水平位置になった際に、スプリング（５４）の伸張力で、予備苗載台（５０）の接続部（５３）が予備苗載台支柱（５１）の柱部（５１ａ）に押し付けられて、そのまま予備苗載台支柱（５１）の柱部（５１ａ）が苗載置姿勢時嵌合部（５３ａ）に嵌め受けられて付勢され固定されるのである。
【００２７】
【発明の効果】
本発明の乗用田植機の予備苗載台取り付け構造は、以上の構成を備えるので次の効果を奏する。
即ち、乗用田植機の運転者は、納屋等への格納時や圃場から圃場への移動の際に、運転座席から降りることなく予備苗載台の苗載置姿勢と格納姿勢との姿勢切り替えが可能になるので、作業効率の向上が図れる。また、補助者がいる場合においても、補助者は、乗用田植機の側方から予備苗載台の苗載置姿勢と格納姿勢との姿勢切り替えが可能であり、運転者は運転座席から降りる必要がない。さらに、保持機構を予備苗載台に担わせることで、部品点数を減少することができコスト削減に寄与する。
【図面の簡単な説明】
【図１】乗用田植機の概略側面図
【図２】苗載置姿勢時における予備苗載台と予備苗載台支柱との位置関係を示す概略平面図
【図３】苗載置姿勢時と格納姿勢時とに切り替える状態における予備苗載台と予備苗載台支柱との位置関係を示す概略平面図
【図４】回動軸上の留め具部分を示す概略斜視図
【図５】格納姿勢時おける予備苗載台と予備苗載台支柱との位置関係を示す概略正面図
【図６】予備苗載台の概略斜視図
【符号の説明】
５０予備苗載台
５１予備苗載台支柱
５２格納姿勢時嵌合部
５３接続部
５３ａ苗載置姿勢時嵌合部
５４スプリング
５５ａ留め具
５５ｂ留め具
５６回動軸
５９貫通孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for attaching a spare seedling stage on which a spare seedling for seedling joining in a riding rice transplanter is placed. In particular, the present invention relates to a structure for attaching a spare seedling platform to a traveling machine of a riding rice transplanter.
[0002]
[Prior art]
Conventionally, in a riding rice transplanter equipped with a preliminary seedling mount, as disclosed in Patent Document 1 below, a position restricting tool having a substantially U-shaped cross section is attached to the preliminary seedling mount, and the position restriction Engage the hook part provided on the tool with the support shaft attached to the preliminary seedling support column, and further, to the biasing force of the spring attached to the position restricting tool so as to protrude to the side of the riding rice transplanter By operating the rod-type operation tool that can be pulled and operated against the outside of the riding rice transplanter, the vertical position of the seedling placement stand when the spare seedling placement stand is mounted on the spare seedling placement stand is almost vertical. There is one that can be switched to the retracted posture when folded downward.
[0003]
By adopting such a reserve seedling stand mounting structure, it is possible to fold the spare seedling stand almost vertically downward without removing it from the stand for the seedling stand, so the width dimension of the riding rice transplanter can be reduced. The passenger rice transplanter could be stored compactly in a barn or the like. However, as described above, in order to switch the preliminary seedling placement table between the seedling placement posture and the storage posture, the rod-type operation tool that can be pulled against the urging force of the spring is directed to the outside of the riding rice transplanter. Have to operate. Also, it is far from the driver's seat to the installation position of the operation tool, and when the driver tries to operate the operation tool from the driver's seat to the outside of the riding rice transplanter, the upper body is thrown out of the riding rice transplanter. I had to. Therefore, when the driver safely switches the standby seedling platform between the seedling placement posture and the storage posture, the driver gets off the riding rice transplanter and turns to the side of the riding rice transplanter, and the operation tool is placed outside the riding rice transplanter. It was inconvenient because it had to be operated to pull in the direction.
[Patent Document 1]
JP 2002-159208 A
[0004]
[Problems to be solved by the invention]
Therefore, the present invention provides a structure for attaching a spare seedling platform for a riding rice transplanter that enables the driver to switch the posture of the preliminary seedling platform without getting off the riding rice transplanter in the riding rice transplanter with a spare seedling platform. The task is to do.
[0005]
[Means for Solving the Problems]
The present invention uses the following means in order to solve the above problems.
In other words, a seedling planting part is provided at the rear part of the traveling machine so as to be movable up and down, and a preliminary seedling stage on which a spare seedling for seedling joining is placed, and a preliminary seedling stage column supporting the preliminary seedling stage, preliminary seedling mounting table is Te outer horizontal and Naeno postures projecting direction, with respect to vehicle body configured to be swingable switched between being pivoted outwardly vertically stored position riding rice transplanter odor to the traveling machine body, The preliminary seedling stage has a connection part that protrudes from an edge of the preliminary seedling stage, and a storage position fitting part that receives the pillar part of the preliminary seedling stage column, and the column of the preliminary seedling stage column Bei give a holding mechanism and a connecting portion part and the support member protrudes from the preliminary seedling mounting table edge and is pressed against holding the preliminary seedling load platform in Naeno postures on the traveling machine body side of the occupant for rice planting machine, The holding mechanism is operated in the front-rear direction with respect to the traveling machine body, so that the preliminary seedling stage is held in the seedling placement position. Holding releasable der is, and when stored, the storage posture when the fitting portion is to pre seedling load platform attachment structure of riding rice planting machine, characterized in that it is fixed by receiving fitting the pillar portion.
[0006]
In the above-mentioned holding mechanism, the spare seedling placing table is operated to slide in the front-rear direction with respect to the traveling machine body, so that the preliminary seedling of the riding rice transplanter can be freely held and released in the seedling placement posture of the spare seedling placing stand. A mounting structure may be used.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, although an embodiment of the present invention is described based on an example shown in a drawing, the following specific examples do not limit the present invention. The embodiment can be appropriately changed in design without departing from the gist of the present invention.
FIG. 1 is a schematic side view of the riding rice transplanter, FIG. 2 is a schematic plan view showing the positional relationship between the preliminary seedling stage and the preliminary seedling stage column in the seedling placement posture, and FIG. FIG. 4 is a schematic plan view showing the positional relationship between the preliminary seedling stage and the preliminary seedling stage column in a state of switching between the setting position and the storing position, and FIG. FIG. 5 is a schematic front view showing the positional relationship between the preliminary seedling stage and the preliminary seedling stage column in the retracted posture, and FIG. 6 is a schematic perspective view of the preliminary seedling stage.
[0008]
Embodiments of the present invention will be described below based on examples shown in the drawings.
FIG. 1 is a schematic side view of a riding rice transplanter. First, the entire riding rice transplanter will be described. In a riding rice transplanter (A) on which an operator is boarded, an engine (2) as a driving part is mounted on a front body frame (3) as a chassis, and a transmission case is located behind the engine (2). Is provided, and the front wheel (6) for paddy field traveling is supported on both sides of the transmission case via the front axle case, and the rear wheel (8) for paddy field traveling is supported via the rear axle case. Further, spare seedling platforms (50) are attached to both sides of the bonnet (9) covering the engine (2) and the like, and the transmission case and the like are covered with a vehicle body cover (12) having a step (11). . A driver seat (13) is attached to the upper portion of the vehicle body cover (12), and a steering handle (14) is provided in front of the driver seat (13). In addition, (15) is a pedal for operating the clutch mechanism and the brake mechanism, and (16) is a fertilizer.
In the following, in the riding rice transplanter (A), traveling functions such as the engine (2), the vehicle body frame (3), the paddy field traveling front wheel (6), the paddy field traveling rear wheel (8), the steering handle (14), etc. An airframe composed of the main parts is called a traveling airframe.
[0009]
At the rear of the traveling body of the riding rice planter (A), for example, a planting part (17) having a seedling stage (20) for six-row planting and a plurality of planting claws (29) is provided so as to be movable up and down. The front and rear low and approximately rectangular plate-shaped forward tilting seedling platforms (20) are connected to the center and left and right planting transmission cases (26) via the lower guide rail (18) and the upper guide rail (19). Is supported so as to be slidable back and forth. And the vertical rib is arrange | positioned by the predetermined space | interval on the upper surface of the seedling mounting stand (20), and is extended in the up-down direction so that a stripe may be divided. In addition, on the lower side of the seedling mounting table (20), a vertical conveying device (22) configured by winding a vertical conveying belt around a driving shaft and a driven shaft arranged in parallel vertically is arranged for each strip. It is installed.
[0010]
The rotary case (27) rotating at a constant speed in one direction is supported by the planting transmission case (26), and a pair of planting claw cases at positions symmetrical about the rotation axis of the rotary case (27). (28) is disposed, and a planting claw (29) is attached to the tip of the planting claw case (28). And the drive shaft extended from the rear part of the transmission case is interlocked and connected to the planting transmission case (26), so that the seedling stage (20) is reciprocated left and right, the vertical transfer device (22), and the rotary case (27). ) And the planting claw case (28).
[0011]
Further, a hitch bracket (31) is pivotally attached to the front end of the planting transmission case (26) via a rolling fulcrum shaft so as to be tiltable to the left and right, and a top link (32) connected to the hitch bracket (31). ) And a lower link (33) are used to connect the planting part (17) to the rear side of the traveling body of the riding rice transplanter (A) using a three-point lifting link mechanism. And this planting part (17) is comprised so that it may raise / lower by the expansion-contraction operation | movement of the hydraulic cylinder interposed between the traveling body rear part of the riding rice transplanter (A), and the lower link (33). Further, below the planting transmission case (26), the center and left and right planting equal floats (35) and (36) are supported via the planting depth adjusting link (37) and the like. The planting depth of the seedling taken out from the seedling mat on the seedling placing stand (20) is set by lowering the part (17) and landing the float (35) (36).
[0012]
Then, the attachment structure of the preliminary seedling stage (50) and the preliminary seedling stage column (51), which is a key point of the present invention, will be described.
As described in the outline of the riding rice transplanter (A), the spare seedling stage (50) and the like are provided on both sides of the bonnet (9). The number of spare seedling platforms (50) shown in FIG. 1 is three on one side and a total of six on both sides, but of course there is no reason to limit to this number and may be changed as appropriate. Moreover, although the shape of each preliminary seedling stage (50) is approximately rectangular as in the prior art, it can be changed as appropriate.
Unless otherwise specified, the following description is appropriate for the attachment structure of each spare seedling stage and the spare seedling stage support.
[0013]
Each spare seedling stage (50) is attached to a preliminary seedling stage column (51), which is a member that supports this. There are a square bar type, a round bar type, a gate character (inverted U character) type, and the like as the shape of the preliminary seedling support column (51), but in the present invention, it is a gate character (inverted U character) shape. Further, there is no particular limitation on the cross-sectional shape of the gate-shaped preliminary seedling support column (51), but it is substantially circular in this embodiment.
[0014]
The method for attaching the spare seedling support column (51) to the traveling machine body of the riding rice transplanter (A) may be a conventionally known method, for example, connected to the vehicle body frame (3) by bolting via a mounting stay or the like. The
[0015]
The spare seedling stage (50) is approximately rectangular as described above, but at the edge of the preliminary seedling stage (50) attached to the preliminary seedling stage column (51), a connection part (53) protruding outward. Is provided. The connecting portion (53) is integrally formed with the preliminary seedling stage (50), but may be attached to the preliminary seedling stage (50) as an independent member from the preliminary seedling stage (50). The connecting portion (50) is provided with a through hole (59) for inserting a rotation shaft (56), which will be described later, between the preliminary seedling stage (50) and the preliminary seedling stage column (51). At the mounting position, the rotating shaft (56) is inserted through the rotating shaft (56) in a substantially horizontal direction with respect to the traveling machine body of the riding rice transplanter (A) together with the spare seedling support column (51). . By comprising in this way, a reserve seedling mounting stand (50) becomes rotatable around the rotating shaft (56).
[0016]
In this embodiment example, since the preliminary seedling support column (51) has a gate shape, the preliminary seedling support column (50) is erected substantially vertically with respect to the traveling machine body of the riding rice transplanter (A). As shown in FIG. 2 and FIG. 3, the spare seedling support column (51) is connected to the column part (51 a) at a total of two locations per one preliminary seedling support base (50).
[0017]
In addition, the connection portion (53) is a semicircular arc-shaped concave portion that can receive approximately half of the outer peripheral portion of the column portion (51a) of the preliminary seedling support column (51) having a circular cross section. An hour fitting part (53a) is provided.
[0018]
In the preliminary seedling stage (50), the preliminary seedling stage column is arranged in an oblique direction from the edge of the preliminary seedling stage (50) attached to the preliminary seedling stage column (51) to the bottom of the preliminary seedling stage (50). A fitting portion (52) in the retracted posture, which is a recess for receiving the column portion (51a) of (51), is provided.
[0019]
As shown in FIGS. 2 and 3, the rotating shaft (56) has at least one of the connection parts between the preliminary seedling stage (50) and the column part (51 a) of the preliminary seedling stage column (51). At least two fasteners (55a) and (55b) are fixedly provided so as to sandwich the connecting part (53) of the preliminary seedling stage (50) and the column part (51a) of the preliminary seedling stage column (51). The The front side of the traveling machine body of the riding rice transplanter (A) and the connection part of the fastener (55a) disposed on the front side of the traveling machine body of the riding rice transplanter (A) of the column part (51a) of the preliminary seedling support column (51). Clips (70) are respectively provided immediately after the traveling body of the riding rice transplanter (A) of the fastener (55b) disposed on the rear side of the traveling body of the riding rice transplanter (A) of (53). The clip (70) has, for example, a shape as shown in FIG. 4, and the straight line of the clip (70) is inserted into a through hole (71) provided in a direction perpendicular to the axial direction of the rotating shaft (56). Insert the shaped part. By adopting such a configuration, it is possible to prevent the pivot shaft (56) from sliding off in the axial direction.
[0020]
In other connection locations, in this embodiment, at least one fastener (55b) is fixedly provided on the rear side of the traveling machine body of the riding rice transplanter (A) of the connection portion (53). Further, as described above, the clip (70) may be provided immediately after the traveling body of the riding rice transplanter (A) of the fastener (55b).
The shape of the fasteners (55a) and (55b) is not particularly limited, but is preferably a circular flat plate.
[0021]
Further, the rotating shaft (56) has a spring (54) between a connecting portion (53) and a fastener (55b) provided on the rear side of the traveling machine body of the riding rice transplanter (A) of the connecting portion (53). Is provided. The attachment position of the spring (54) is not limited to such an attachment position. For example, the pillar part (51a) of the preliminary seedling stand column (51) and the riding rice planting of the connection part (53) are appropriately used. Although it may be provided at a portion sandwiched between the fastener (55a) provided on the front side of the traveling body of the machine (A), the flat plate-like portion and the connection portion (53) of the fastener (55b). A stable operation is possible by providing a spring (54) in the flat plate-like portion on the rear side of the traveling machine body of the passenger rice transplanter (A).
[0022]
Next, an outline of the switching operation between the seedling placement posture and the storage posture of the preliminary seedling placement stand (50) under the above-described configuration will be described.
First, the preliminary seedling stage (50) in the seedling mounting posture on which the preliminary seedling is mounted is positioned substantially horizontally, and in this state, the extension force of the spring (54) causes the preliminary seedling stage (50) to move. The connecting portion (53) is pressed against the column portion (51a) of the preliminary seedling support column (51) (see FIG. 2). That is, by the pressure contact by the spring (54), the fitting portion (53a) at the time of the seedling placement posture fits the column portion (51a) of the preliminary seedling placement support column (51). Thus, the preliminary seedling stage (50) is urged and fixed to the preliminary seedling stage column (51) almost horizontally. An anti-slip process may be applied to the surface portion where the fitting portion (53a) in the seedling placement posture and the column portion (51a) of the preliminary seedling support column (51) are in contact with each other.
[0023]
In addition, the connection part (53) of the preliminary seedling mounting base (50) does not necessarily have to be provided with a semicircular recess, but the cross-sectional shape of the column part (51a) of the preliminary seedling mounting base column (51). Just fit. In short, since the preliminary seedling stage (50) can be held when being urged to a substantially horizontal position, the convex part and the concave part are connected to the connecting part (53) of the preliminary seedling stage (50) and the preliminary seedling. The concave portion and the convex portion may be fitted when provided on the column portion (51a) of the mounting column (51) and further pressed by the spring (54).
[0024]
As described above, in order to set the seedling placement stand (50) of the seedling placement posture biased almost horizontally to the retracted posture, the driver of the riding rice transplanter (A) is on the driver seat (13) side. From this, the arm is extended and a hand is placed on, for example, the edge portion of the preliminary seedling platform (50), and the preliminary seedling platform (50) is moved to the rear of the traveling machine body of the riding rice transplanter (A) in this embodiment. Slide to pull. Then, the spring (54) is compressed, and the fitting portion (53a) at the time of the seedling placement posture is separated from the column portion (51a) of the preliminary seedling support column (51) (see FIG. 3). . In such a state, the preliminary seedling stage (50) can swing around the rotation shaft (56). Then, a driver | operator moves a reserve seedling stand (50) vertically downward with respect to the traveling body of a riding rice transplanter (A). Since the spare seedling platform (50) itself is heavy, the driver moves the preliminary seedling platform (50) vertically downward relative to the traveling body of the riding rice transplanter (A) without requiring a large force. It is possible. And the reserve seedling stand (50) moved vertically downward with respect to the traveling machine body of the riding rice transplanter (A), the column portion of the spare seedling support column (51) is fitted to the fitting portion (52) in the retracted posture. (51a) is received (see FIG. 5). That is, by providing the fitting portion (52) in the retracted posture, when the reserve seedling platform (50) is set in the retracted posture, the corner of the bottom portion of the reserve seedling platform (50) becomes the spare seedling platform column (51). ) And the width dimension of the riding rice transplanter (A) in the retracted position is reduced as much as possible.
[0025]
In view of the operation method of the preliminary seedling platform (50) as described above, the fitting portion (52) in the retracted posture allows the driver to set the preliminary seedling platform (50) to the compression limit of the spring (54). When it is moved vertically downward with respect to the traveling machine body of the riding rice transplanter (A) in a state pulled to a maximum, it is preferably provided at a position where the column portion (51a) of the preliminary seedling support column (51) can be received. This is because, by doing so, the driver is freed from the trouble of operating while confirming the positional relationship between the spare seedling table (50) and the spare seedling table column (51).
[0026]
In order to switch the posture from the retracted posture to the seedling placement posture, it is only necessary to raise the preliminary seedling placement stand (50) from a position vertically below the traveling machine body of the riding rice transplanter (A) to a substantially horizontal position. That is, when the preliminary seedling stage (50) is pulled up, the connecting part (53) of the preliminary seedling stage (50) is moved by the extension force of the spring (54) when it is almost in the horizontal position. The column part (51a) of the preliminary seedling stage support column (51) is directly pressed against the column part (51a) of (51) and is received by the fitting part (53a) in the seedling placement posture and is urged and fixed. It is done.
[0027]
【The invention's effect】
Since the preliminary seedling stage mounting structure of the riding rice transplanter according to the present invention has the above-described configuration, the following effects can be obtained.
That is, the driver of the riding rice transplanter can change the posture between the seedling placement posture and the storage posture of the spare seedling stand without getting off the driver's seat at the time of storage in a barn or the like or when moving from the field to the field. This makes it possible to improve work efficiency. In addition, even if there is an assistant, the assistant can switch between the seedling placement position and the storage position of the spare seedling platform from the side of the riding rice transplanter, and the driver needs to get off the driver's seat There is no. Furthermore, by placing the holding mechanism on the spare seedling stage, the number of parts can be reduced, which contributes to cost reduction.
[Brief description of the drawings]
[Fig. 1] Schematic side view of riding rice transplanter [Fig. 2] Schematic plan view showing the positional relationship between the spare seedling platform and the spare seedling platform column in the seedling placement posture [Fig. 3] In the seedling placement posture FIG. 4 is a schematic perspective view showing a fastener part on a rotating shaft. FIG. 5 is a storage perspective. Schematic front view showing the positional relationship between the spare seedling stage and the preliminary seedling stage column [Fig. 6] Schematic perspective view of the preliminary seedling stage [Explanation of symbols]
50 Preparatory seedling stand 51 Preliminary seedling support column 52 Fitting portion 53 in the retracted posture Connection portion 53a Fitting portion in the seedling placement posture 54 Spring 55a Fastener 55b Fastener 56 Rotating shaft 59 Through-hole

Claims

A seedling planting part is provided at the rear part of the traveling machine so as to be movable up and down, and includes a spare seedling stage on which a spare seedling for seedling joining is placed, and a spare seedling stage column supporting the preliminary seedling stage, the platform is, Te outer horizontal and Naeno postures projecting direction, with respect to vehicle body configured to be swingable switched between being pivoted outwardly vertically stored position riding rice transplanter odor to the traveling machine body,
The preliminary seedling stage has a connection part that protrudes from the edge thereof, and a fitting part at the time of storage posture that receives the pillar part of the preliminary seedling stage column,
The riding rice transplanter has a holding mechanism for holding the spare seedling stage in a seedling placement posture by press-contacting a column part of the preliminary seedling stage column and a connection part formed protruding from an edge of the preliminary seedling stage for example prepare for the traveling machine body side, the holding mechanism, by being operated in the longitudinal direction with respect to vehicle body, Ri held and retained releasably der preliminary seedling load platform in Naeno postures,
And at the time of storage, preliminary seedling load platform attachment structure of riding rice transplanter the fitting portion when the stored position is characterized in that it is fixed by receiving fitting the pillar portion.

2. The holding mechanism according to claim 1, wherein the preliminary seedling stage is slidable in the front-rear direction with respect to the traveling machine body so that the preliminary seedling stage can be held and released in the seedling placement posture. A structure for mounting a seedling stand on the rice paddy machine.