JP2004000241A

JP2004000241A - Riding rice transplanter

Info

Publication number: JP2004000241A
Application number: JP2003182876A
Authority: JP
Inventors: Masabumi Saeki; 佐伯　正文; Hiroyuki Niiyama; 新山　裕之; Takashi Suzuki; 鈴木　隆; Isao Ishida; 石田　伊佐男
Original assignee: Iseki and Co Ltd; Iseki Agricultural Machinery Mfg Co Ltd
Current assignee: Iseki and Co Ltd; Iseki Agricultural Machinery Mfg Co Ltd
Priority date: 2003-06-26
Filing date: 2003-06-26
Publication date: 2004-01-08

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding rice transplanter with a good operating efficiency which improves efficiency of carrying and storing by making the width of a machine smaller than before during carrying and storing, and in which one can pass on a floor face of both left and right sides of the front part of a car body and get on and off during working. <P>SOLUTION: The riding rice transplanter is provided with reserve seedling loading tables 34 on both left and right sides of a traveling car body 1. Seedling stands 37 on the reserve seedling loading tables 34 can be moved to a condition where the seedling stands 37 are piled up on the floor face of both left and right sides of the front part of the car body by a plan view of the car body, and a condition where they are positioned more outward than the condition in the left and right direction. The outside end parts of the seedling stands 37 being under the condition where they are positioned outward, are positioned more outward than the outside end parts of seedling loading tables 26 , and are positioned more inward than side markers 50 for fitting to adjoining lines being already planted. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、乗用型の田植機に関する。
【０００２】
【従来の技術】
近年の乗用田植機では、車体前部の左右両側にフロア面を設けてそのフロア面上を通行して機体前方から作業者が車体に乗降できるようにしている。これにより、畦から苗を補給するときに、機体を旋回させずに畦に向かって前進させて畦直前で機体を停止すると、作業者は水田内に降りずに直接車体上から畦に降り又畦から直接車体上に乗ることができるようになって、作業性が向上する。
【０００３】
また、乗用田植機では、通常、作業能率向上のため多数の苗を機体に搭載できるよう、予備苗載台を走行車体の左右両側に設ける。ところが、予備苗載台を車体の左右両側に設けるにあたり、上記のように車体前部の左右両側にフロア面を設けてそのフロア面上を通行できるようにすると、予備苗載台が車体の左右外側方にはみ出た状態となるよう設けられることになり、その結果、機体の左右幅が大きいものとなって、機体を効率良く運搬・格納できない。
【０００４】
【特許文献１】
特開昭６１−１９２２１５号公報（第２図）
【０００５】
【発明が解決しようとする課題】
そこで、この発明は、予備苗載台を走行車体の左右両側に設けた乗用田植機であって、運搬・格納時には、機体の左右幅が従来よりも小さくなるようにして運搬・格納の効率を向上しつつ、作業時には、車体前部の左右両側のフロア面上を通行して乗降できるようにして作業能率の良いものとした乗用田植機を得ることを課題とする。
【０００６】
【課題を解決するための手段】
そこで、この発明は、上記課題を解決するために、左右前輪４と左右後輪５を装備した走行車体１に座席９の前側左右側部から車体前部に至るフロア面を有する左右ステップフロア８を設け、該左右ステップフロア８の左右外側に立設した支持フレーム３５に苗を載せる苗台３７を備えた予備苗載台３４を取り付け、該走行車体１の後部にリンク２４を介して苗載台２６を装備した苗移植作業機２を連結した乗用田植機において、予備苗載台３４の支持フレーム３５はその基部が前輪４よりも前側で機体正面視で機体左右方向に延びてその左右端部から更に上方に向けて設けた構成とし、該上方に向けて設けた支持フレーム３５部に前記予備苗載台３４の苗台３７を設けて、該苗台３７を車体平面視で車体前部の左右両側のフロア面上に重なる状態と、該状態より左右方向外方に位置する状態とに移動できる構成とすると共に、該外方に位置する状態とした苗台３７の外側端部が苗載台２６外側端部よりも外方に位置し、且つ、隣接既植付条に条合せするサイドマーカー５０よりも機体内方に位置する構成とした乗用田植機としたものである。
【０００７】
従って、この乗用田植機は、運搬・格納時には、基部が前輪４よりも前側で機体正面視で機体左右方向に延びてその左右端部から更に上方に向けて設けた支持フレーム３５部に予備苗載台３４の苗台３７を設けて、その苗台３７を、車体平面視で車体前部の左右両側のフロア面上に重なる状態に移動しておくことで、車体前部の左右両側のフロア面上の空間を利用して機体の左右幅を従来よりも小さくすることができ、効率良く運搬でき、狭い場所への格納も容易に行える。
【０００８】
作業時には、予備苗載台３４の苗台３７を上記の状態より左右方向外側で、苗台３７の外側端部が苗載台２６外側端部よりも外方に位置し、且つ、隣接既植付条に条合せするサイドマーカー５０よりも機体内方に位置する状態に移動しておくことで、車体前部の左右両側のフロア面の上方が解放され、畦の苗を機体に搭載するときなどに車体前部から乗降することが容易に行え、また、苗台３７の外側端部が苗載台２６外側端部よりも外方に位置することにより予備苗載台３４の苗台３７に苗を搭載する作業及び苗台３７から苗を取出して苗載台２６に供給する作業も容易で非常に作業性が良い。また、予備苗載台３４の苗台３７を左右方向外側に位置させた状態でも、サイドマーカー５０が苗台３７の外側端部よりも機体外側方に位置することになるので、作業者はサイドマーカー５０が良く見えて隣接既植付条に条合せして機体を走行させることが容易に行える。
【０００９】
【発明の効果】
よって、この発明は、基部が前輪４よりも前側で機体正面視で機体左右方向に延びてその左右端部から更に上方に向けて設けた支持フレーム３５部に予備苗載台３４の苗台３７を設けて、その苗台３７を上記のように移動することにより、運搬・格納時には、車体前部の左右両側のフロア面上の空間を利用して機体の左右幅を従来よりも小さくできて、運搬・格納の効率が良いものとなり、しかも、作業時には、車体前部の左右両側のフロア面上を通行して乗降し能率良く作業が行え、作業者はサイドマーカー５０が良く見えて隣接既植付条に条合せして機体を走行させることが容易に行えるようになる。
【００１０】
【発明の実施の形態】
以下に、本発明の一実施例を図面に基づき詳細に説明する。図中の符号１は乗用型走行車体で、後方にリンク２４を介して苗移植作業機２を連結している。３はエンジンであって、前後方向で前輪４、４と後輪５、５の間で、ミッションケース６の後端から後方に向けて固着された１本のフレーム７ａ上に搭載されている。またエンジン３の上側はステップフロア８と一体のエンジンカバー部８ａで覆われ、そのカバー８ａ上に座席９が配設されている。ステップフロア８は、座席９に座る作業者の足元部分、及び座席９の左右下側、そして、ハンドル１５の左右下側即ち車体前部の左右両側に渡ってフロア面が連続的に延設されている。更に、座席９の左右両側には、ステップ８上への乗り降り用の乗降ステップ部８ｂ、８ｂが一体的に設けられている。また、座席９の後側にはリヤステップ８ｃ、８ｃが設けられている。このリヤステップ８ｃ、８ｃは左右所定の間隔をあけて取付けられていて、その間をリンク２４が油圧シリンダ２３により昇降作動する。また、リヤステップ８ｃ、８ｃは、苗移植作業機２の苗載台２６の上位側（前側）部の下方に入り込むように位置させて取り付けられている。これにより、リヤステップ８ｃ、８ｃに足を載せて、容易に、苗載台２６の上に体を乗り出すことができ、苗載台２６に載せた苗がめくれ上がったり、逆に滑り落ちなかったり等の苗載置不良状態を起こしたときに、安定した姿勢で、苗載台の下位側部に向かって手を延ばして不良状態となった苗を直接手で修正することができる。
【００１１】
エンジン３の回転動力は、伝動ベルト１０を介してエンジン出力軸３ａから油圧ポンプ駆動軸１１ａに伝動し、更に、油圧ポンプ駆動軸１１ａから伝動ベルト１２を介してミッションケース６の入力軸６ａに伝動する。ミッションケース６内に伝えられた動力は、走行系、作業機系へと伝達される。また、副変速機構として、図５−（ａ）〜（ｄ）に示されるように、エンジン３の出力軸３ａから油圧ポンプ１１の駆動軸１１ａへの伝動と、油圧ポンプ１１の駆動軸１１ａからミッションケース６の入力軸６ａへの伝動とが、それぞれ伝動回転数を無段階に切替られる構成になっている。即ち、エンジン３の出力軸３ａにはエンジン出力プーリー３ｂが一体回転するように取付けられ、油圧ポンプ１１の駆動軸１１ａには割プーリ１１ｂが一体回転且つプーリー幅を変更可能に取付けられている。この割プーリー１１ｂとエンジン出力プーリー３ｂとに伝動ベルト１０が巻き掛けられる。そして、ベルト１０に張力をかけるベルトテンション装置Ｔ１が設けられ、テンションローラーＲ１がベルトテンションを強める側に移動すると、前記割プーリー１１ｂの可動プーリ側が軸方向に摺動してプーリー幅が広くなり、割プーリー１１ｂへのベルト巻き付き半径が小さくなって油圧ポンプ１１側への伝動回転数が増大する。尚、割プーリー１１ｂの可動プーリーは、スプリングＳＰ１によりプーリー幅を小さくする方向に摺動するよう付勢されている。また、テンションローラーＲ１は、回動自在に枢支されたＬ字状のローラーアームＡ１に回動自在に取付けられて枢支軸廻りに揺動するようになっている。そして、ローラーアームＡ１のローラーＲ１取り付け側と反対側の端部と機体に枢着された副変速レバーＶＬに一体の操作プレートＡ１’の長孔部ａとがスプリングＳＰ１’を介したロッドＬ１で連結されている。
【００１２】
次に、油圧ポンプ１１の駆動軸１１ａには前記割プーリ１１ｂの外側に油圧第２プーリー１１ｃが一体回転するように取付けられ、トランスミッション６の入力軸６ａには前記割プーリー１１ｂと同様の割プーリ６ｂが一体回転且つプーリー幅を変更可能に取付けられている。この割プーリー６ｂと油圧第２プーリー１１ｃとに伝動ベルト１２が巻き掛けられる。そして、ベルト１２に張力をかけるベルトテンション装置Ｔ２が設けられ、テンションローラーＲ２がベルトテンションを強める側に移動すると、前記割プーリー６ｂの可動プーリ側が軸方向に摺動してプーリー幅が広くなり、割プーリー６ｂへのベルト巻き付き半径が小さくなってミッションケース６側への伝動回転数が増大する。尚、割プーリー６ｂの可動プーリーは、スプリングＳＰ２によりプーリー幅を小さくする方向に摺動するよう付勢されている。また、テンションローラーＲ２は、回動自在に枢支されたＬ字状のローラーアームＡ２に回動自在に取付けられて枢支軸廻りに揺動するようになっている。そして、ローラーアームＡ２のローラーＲ２取り付け側と反対側の端部と機体に枢着された副変速レバーＶＬに一体の操作プレートＡ２’とがスプリングＳＰ２’を介したロッドＬ２で連結されている。
【００１３】
上記構成の副変速機構は、副変速レバーＶＬにより以下のように作動する。即ち、副変速レバーＶＬが最低速位置Ｐ１に位置するときは、図５−（ａ）に示されるように、油圧ポンプ１１側の割プーリー１１ｂとミッションケース６側の割プーリー６ｂとが両方ともベルト巻き付き半径が最大半径となる低速伝動状態となる。この状態が最低速伝動状態となる。次に、副変速レバーＶＬを中速位置Ｐ２までシフトすると、図５−（ｂ）に示されるように、油圧ポンプ１１側のテンション装置Ｔ１側はロッドＬ１が操作プレートＡ１’の長孔部ａを融通して引っ張られないので作動せず、油圧ポンプ１１側の割プーリー１１ｂは低速伝動状態のままとなる。しかし、ミッションケース６側の割プーリー６ｂは、副変速レバーＶＬに一体の操作プレートＡ２’にロッドＬ２が引っ張られてローラーアームＡ２が揺動し、テンションローラーＲ２が移動してベルト巻き付き半径が最小半径となり高速伝動状態となる。この状態が中速伝動状態となる。前記最低速伝動状態からこの中速伝動状態までの間の変速は無段階に操作でき、しかも、この間は、油圧ポンプ１１の駆動軸１１ａへの伝動回転数は変化せず（但し、エンジンアクセル一定において）、油圧作動系（例えば油圧シリンダ２３）の最低限必要な作動スピードは保持される。そして、副変速レバーＶＬを最高速位置Ｐ３までシフトすると、図５−（ｃ）に示されるように、油圧ポンプ１１側のテンション装置Ｔ１はロッドＬ１が長孔部ａの融通許容範囲の融通が終って引っ張られ、ローラーアームＡ１が揺動してテンションローラーＲ１が移動し、油圧ポンプ１１側の割プーリー１１ｂのベルト巻き付き半径が最小半径となる高速伝動状態となる。一方、ミッションケース６側の割プーリー６ｂは、前述のように、既に、ベルト巻き付き半径が最小半径となるまでテンションローラーＲ２が移動しているから、ロッドＬ２のスプリングＳＰ２’が伸びて高速伝動状態が維持される。この状態が最高速伝動状態となる。前記中速伝動状態からこの最高速伝動状態までの間の変速も無段階に操作でき前記最低速伝動状態から連続的に変速操作できる。更に、この間は、油圧ポンプ１１の駆動軸１１ａへの伝動回転数が増大していき、油圧シリンダ２３などの油圧作動系の作動スピードが走行スピードの増大に伴って増大し、高速作業走行における苗移植作業機２の昇降制御の追従性を高められる。
【００１４】
前輪４、４は、ミッションケース６の左右両側に連結固着する前輪伝動ケース１４ａ、１４ｂの下側ケース１４ｂに軸架されている。また、前輪４、４は、ミッションケース６から伝動されて駆動回転し、更に、ハンドル１５の回動に対応して操向回動するようになっている。ハンドル１５が回動すると、ステアリング軸１５ａを介してアーム１６が連動して回動し、そのアーム１６がロッド１７、１７を介して上側の前輪伝動ケース１４ａに対して回動自在な下側ケース１４ｂ、１４ｂと連結して、ハンドル１５の回動操作が前輪４、４に伝動されるようになっている。
【００１５】
後輪５、５は、フレーム７ａの後端の横フレーム７ｂの中央に後方へ向けて固着されたローリング軸１８にローリング自在に取り付けられた後輪フレーム１９の左右端部の後輪ギヤケース２０、２０に軸架されている。よって、後輪５、５はローリング軸１８周りにローリング可能な構成になっている。後輪５、５への伝動は、ミッションケース６内の動力が、そのミッション内の後輪用の差動装置を介して、ミッションケース６の後端部左右２箇所から後方に突出させた後輪駆動軸２１、２１に伝動され、その駆動軸２１、２１と後輪ギヤケース２０、２０の入力軸２０ａ、２０ａとを自在継手、伸縮継手を備えた後輪伝動軸２２、２２が連結して、後輪５、５へ動力が伝達されている。
【００１６】
２３は油圧シリンダで、シリンダの基部側はエンジン３の下側でフレーム７ａに固着されたブラケットに軸支され、ピストンロッドの先端は走行車体１と作業機２を連結するリンク２４のアッパーリンク２４ａに一体のアーム２５に連結されている。油圧シリンダ２３のシリンダ内へオイルが流入、流出することによって、ピストンロッドが突出、引退し、リンク２４が走行車体１側を回動支点として上下し、作業機が昇降する。
【００１７】
リンク２４は、アッパーリンク２４ａとロアーリンク２４ｂ、２４ｂが、走行車体１側の横フレーム７ｂに固着された走行車体側リンクベース２４ｃにリンク回動支点として連結され、苗移植作業機２側には植付伝動ケース２７に固着のローリング連結軸２７ａを左右ローリング自在に軸受している作業機側リンクベース２４ｄが連結されている。
【００１８】
２５は作業機伝動軸で、ミッションケース６の後側部から後方に向けて突出させたＰＴＯ軸の回転動力を、作業機２の入力軸へ自在継手、伸縮継手を介して伝達する。２６は苗載台で、前側が上位に後側が下位になるよう傾斜させて植付部伝動ケース２７に固定されているレール上に左右スライド可能に取り付けられている。伝動ケース２７内の左右往復機構により苗載台２６は左右に往復移動して、植付装置２８…にその植え付けサイクルに合わせて一株づつ苗を供給する。
【００１９】
植付装置２８…は、植付部伝動ケース２７の左右端側からそれぞれ後方に向かって延びる２本の植付伝動フレーム２９、２９の後側に、左右両側２条分づつ取り付けられ全体で４条植え分装着されている。各条の植え付け装置２８…は植付伝動フレーム２９、２９内のチェーン伝動機構を介して伝動ケース２７の動力が伝達されている。また、植付装置２８は、回転ケース３０とそれに装着された２基の植付具３１、３１から構成されている。この２基の植付具３１、３１のそれぞれに植付爪が設けられ、その先端が回転ケース３０の回転に伴うケース内のギヤ列の回転伝動によって楕円状の軌跡を描く運動を行い、苗載台２６の苗供給に合わせて一株づつ苗を取って圃場に植え付けていく。
【００２０】
３２ａ、３２ｂ、３２ｃはそれぞれ左側、中央側、及び右側の整地フロートで、植付伝動フレーム２９、２９の下側にそれぞれ前端が上下に揺動可能に吊り下げられ、植え付け圃場の泥面を整地しながら滑走していく。尚、中央整地フロート３２ｂは、作業機２を昇降させる油圧シリンダ２３を作動させる油圧バルブ２３ａのスプールと連結して、作業機昇降制御のセンサーフロートも兼ねる。
【００２１】
３４、３４は予備苗載台で、それぞれ機体の左右に取り付けられている。左右の予備苗載台３４、３４は、それぞれ同じ構成をとっており、具体的には以下のようになっている。即ち、予備苗載台３４の支持フレーム３５は、側面視逆Ｌ字状に成形されていて、その下側基部はミッションケース６の前側に固着のブラケット３５ａに固着され、遊端部には上下方向の回動軸３６を受ける軸受部材３５ｂが固着している。また、苗を収容した箱或は苗そのままを一枚づつ載せられる苗台３７、３７は苗台フレーム３８ａ…、３８ｂ…に下側から固定支持され、苗台フレーム３８…、３８ｂ…は上下の回動軸３６を貫通する軸孔を有する回動部材３９に固着されている。その回動部材３９の軸孔と前記軸受部材３５ｂの軸孔とを上下に連ねて回動軸３６を貫通することで、苗台３７、３７を支持フレーム３５に回動軸３６廻りに回動自在に取付けられる。そして、軸受部材３５ｂに固着のブラケット３５ｃ、３５ｃで支持されたレバー回動支軸３５ｄに苗台固定レバー４０の係止プレート部４０ａが枢支されている。このレバー４０の係止プレート部４０ａが前記回動部材３９の下端に固着された回動プレート３９ａの固定位置決め用の切欠き部３９ｂ…の一つに係合させると、苗台３７、３７の回動軸３６廻りの回動が阻止される。レバーの把手部４０ｂを持ち上げると、係止プレート部４０ａが回動プレート３９ａの切欠き部３９ｂから外れ、苗台３７、３７の回動軸３６廻りの回動は許容される。そして、別の切欠き部３９ｂに係合させれば、再び、苗台３７、３７を別の姿勢で固定できる。切欠き部３９ｂ…は、３個所設けられている。
【００２２】
まず、切欠き位置Ｘ１に係合すると、苗台３７、３７がハンドル１５に近接して車体平面視でステップフロア８の車体前部の左右両側に設けたフロア面上に重なる状態となり、このときハンドル１５の左右を通過して機体前方からは乗り降りするには苗台３７…が邪魔になるが、図面に示すように苗台３７…は車体側面視で車体側部に設けた乗降用のステップ部８ｂ，８ｂ上方に重ならない状態にあるから、乗降ステップ部８ｂ、８ｂを用いて走行車体１の側方から乗り降りするのには苗台３７…が邪魔にならない。そして、左右の苗台３７…をこの状態に位置させれば、乗用田植機の左右最大幅（苗移植作業機２の苗載台２６下端部の苗受枠２６ａの左右幅）よりも、予備苗載台３４、３４の左右の幅が狭く内側に入った状態となる。したがって、運搬・格納時に苗台３７…をこの状態に移動することで、車体前部の左右両側のフロア面上の空間を利用して機体の左右幅を従来よりも小さくさせられて、効率良く運搬でき、狭い場所への格納も容易に行える。しかも、狭い場所に機体を前進させて乗り入れるときやそこから出すときに、苗台３７…が邪魔にならないで、車体側方から降りたり乗ったりすることが容易に行える。
【００２３】
また、切欠き位置Ｘ２に係合すると、上記の状態より左右方向外側に位置する状態に移動する。したがって、作業時に、苗台３７…をこの状態に移動することで、車体前部の左右両側のフロア面の上方が解放され、畦の苗を機体に搭載するときなどに車体前部から乗降することが容易に行える。このとき支持フレーム３５、３５の水平部３５’、３５’は乗り降り時の手摺りとなる。尚、左右の苗台３７…をこの状態に位置させれば、乗用田植機の左右最大幅よりも、予備苗載台３４、３４の左右の幅が広く外側に出るが、前述の前側からの乗り降りができることに加えて、前方視界が広くなり、特に予備苗載台３４、３４で見えずらくなりがちな隣接既植付条への条合せサイドマーカー５０、５０の確認も良好となる。尚、切欠き部３９ｂ（切欠き位置Ｘ３）で係止すると、苗台３７…の長手方向が左右横方向になる。
【図面の簡単な説明】
【図１】実施例の乗用田植機を示す平面図である。
【図２】実施例の乗用田植機を示す側面図である。
【図３】予備苗載台の部分断面側面図である。
【図４】予備苗載台の部分断面平面図である。
【図５】副変速機構の説明図で、（ａ）最低速伝動状態の簡略側面図、（ｂ）中速伝動状態の簡略側面図、（ｃ）最高速伝動状態の簡略側面図、（ｄ）簡略平面図である。
【符号の説明】
１：走行車体
２：苗移植作業機
４：左右前輪
５：左右後輪
８：ステップフロア
９：座席
２４：リンク
２６：苗載台
３４：予備苗載台
３５：支持フレーム
３７：苗台
５０：サイドマーカー[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a riding type rice transplanter.
[0002]
[Prior art]
2. Description of the Related Art Recent rice transplanters are provided with floor surfaces on both left and right sides of a front portion of a vehicle body so that an operator can get on and off the vehicle body from the front of the vehicle body by passing over the floor surface. With this, when replenishing seedlings from the ridge, if the aircraft is advanced toward the ridge without turning, and the aircraft is stopped just before the ridge, the worker can directly descend on the ridge from the vehicle body without falling into the paddy field. It is possible to get on the car body directly from the ridge, and workability is improved.
[0003]
In addition, in a riding rice transplanter, spare seedling mounts are usually provided on both the left and right sides of the traveling vehicle body so that a large number of seedlings can be mounted on the body to improve work efficiency. However, when the spare seedling mounting tables are provided on both the left and right sides of the vehicle body, if the floor surfaces are provided on the left and right sides of the front part of the vehicle body so that they can pass on the floor surface as described above, the spare seedling mounting tables The body is provided so as to protrude outward, and as a result, the lateral width of the body becomes large, and the body cannot be efficiently transported and stored.
[0004]
[Patent Document 1]
JP-A-61-192215 (FIG. 2)
[0005]
[Problems to be solved by the invention]
Therefore, the present invention is a riding rice transplanter in which spare seedling mounting tables are provided on both left and right sides of a traveling vehicle body, and when transporting and storing, the lateral width of the body is made smaller than before to improve transport and storage efficiency. It is an object of the present invention to provide a riding rice transplanter that is capable of getting on and off by passing on the floor surfaces on both the left and right sides of a front part of a vehicle body at the time of work while improving the work efficiency.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a traveling vehicle body 1 equipped with left and right front wheels 4 and left and right rear wheels 5 with a left and right step floor 8 having a floor surface extending from the front left and right sides of a seat 9 to the front of the vehicle. And a spare seedling stand 34 having a seedling stand 37 for placing seedlings on a support frame 35 erected on the left and right outer sides of the left and right step floors 8. In the riding rice transplanter to which the seedling transplanting machine 2 equipped with the stand 26 is connected, the base of the support frame 35 of the spare seedling mount 34 extends in the left-right direction of the body in front view of the body at the front side of the front wheel 4 and has the left and right ends. The seedling stand 37 of the spare seedling mounting table 34 is provided on the support frame 35 provided upwardly from the portion, and the seedling stand 37 is positioned at the front of the vehicle body in a plan view of the vehicle body. On both sides of the floor And the outer end of the seedling stand 37, which is located outside, is more outward than the outer end of the seedling table 26. This is a riding rice transplanter having a configuration in which the side marker 50 is positioned further inward than the side marker 50 that is aligned with an adjacent planted strip.
[0007]
Therefore, during transportation / storage, the riding rice transplanter has a base extending in the left-right direction of the fuselage in front of the front wheel 4 when viewed from the front of the fuselage, and is provided on a support frame 35 provided further upward from the left and right ends thereof. The seedling stand 37 of the mounting stand 34 is provided, and the seedling stand 37 is moved so as to be overlapped on the floor surfaces on the left and right sides of the front part of the vehicle body in a plan view of the vehicle body. By utilizing the space on the surface, the lateral width of the airframe can be made smaller than before, so that it can be efficiently transported and easily stored in a narrow place.
[0008]
At the time of the operation, the seedling stand 37 of the spare seedling placing stand 34 is located outside the above-mentioned state in the left-right direction, the outer end of the seedling stand 37 is located outside the outer end of the seedling placing stand 26, and the adjacent seeding stand is located. By moving to a position located in the interior of the aircraft relative to the side marker 50 to be aligned with the appendix, the upper portions of the floor surfaces on both the left and right sides of the front of the vehicle body are released, and when the seedlings in the ridge are mounted on the aircraft. It is easy to get on and off from the front of the vehicle body, and the outer end of the seedling stand 37 is located outside the outer end of the seedling stand 26 so that the seedling stand 37 of the spare seedling stand 34 The work of mounting the seedlings and the work of taking out the seedlings from the seedling stand 37 and supplying them to the seedling mounting stand 26 are also easy and have very good workability. Further, even when the seedling stand 37 of the spare seedling mounting stand 34 is positioned outside in the left-right direction, the side marker 50 is located outside the machine body from the outer end of the seedling stand 37. The marker 50 can be easily seen, and the aircraft can be easily moved in alignment with the adjacent planted strip.
[0009]
【The invention's effect】
Therefore, according to the present invention, the seedling stand 37 of the preliminary seedling mounting table 34 is provided on a support frame 35 portion whose base portion extends in the left-right direction of the fuselage in front of the front wheel 4 when viewed from the front of the fuselage and is provided further upward from the left and right ends thereof. By moving the seedling stand 37 as described above, during transportation and storage, the left and right width of the body can be made smaller than before by utilizing the space on the floor surfaces on the left and right sides of the front of the vehicle body. In addition, the efficiency of transportation and storage is improved, and at the time of work, the operator can get on and off the vehicle by passing through the front and left floor surfaces of the front of the vehicle body and work efficiently. It is possible to easily run the aircraft in accordance with the planting strip.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below in detail with reference to the drawings. Reference numeral 1 in the figure denotes a riding type traveling vehicle body, to which a seedling transplanting working machine 2 is connected via a link 24 at the rear. Reference numeral 3 denotes an engine mounted on a single frame 7a fixed rearward from the rear end of the transmission case 6 between the front wheels 4, 4 and the rear wheels 5, 5 in the front-rear direction. The upper side of the engine 3 is covered with an engine cover 8a integrated with the step floor 8, and a seat 9 is arranged on the cover 8a. The step floor 8 has a floor surface continuously extending over a foot portion of an operator sitting on the seat 9, right and left lower sides of the seat 9, and right and left lower sides of the handle 15, that is, right and left sides of the front of the vehicle body. ing. Further, on both left and right sides of the seat 9, there are integrally provided getting-on / off step portions 8b, 8b for getting on and off the step 8. Further, rear steps 8c, 8c are provided on the rear side of the seat 9. The rear steps 8c, 8c are mounted with a predetermined left and right space, and the link 24 is moved up and down by the hydraulic cylinder 23 between them. The rear steps 8c, 8c are mounted so as to be positioned below the upper (front) portion of the seedling mounting table 26 of the seedling transplanter 2. Thus, the feet can be placed on the rear steps 8c, 8c, and the body can easily lean on the seedling mounting table 26, and the seedlings placed on the seedling mounting table 26 do not turn up or slide down. When the poor seedling placement state occurs, it is possible to directly reach out to the lower side of the seedling mounting table in a stable posture, and to manually correct the defective seedling.
[0011]
The rotational power of the engine 3 is transmitted from the engine output shaft 3a to the hydraulic pump drive shaft 11a via the transmission belt 10, and further transmitted from the hydraulic pump drive shaft 11a to the input shaft 6a of the transmission case 6 via the transmission belt 12. I do. The power transmitted into the transmission case 6 is transmitted to the traveling system and the working machine system. In addition, as shown in FIGS. 5A to 5D, the transmission from the output shaft 3 a of the engine 3 to the drive shaft 11 a of the hydraulic pump 11 and the drive shaft 11 a of the hydraulic pump 11 The transmission of the transmission to the input shaft 6a of the transmission case 6 is configured such that the transmission rotational speed can be switched steplessly. That is, an engine output pulley 3b is mounted on the output shaft 3a of the engine 3 so as to rotate integrally therewith, and a split pulley 11b is mounted on the drive shaft 11a of the hydraulic pump 11 so as to rotate integrally and change the pulley width. The transmission belt 10 is wound around the split pulley 11b and the engine output pulley 3b. Then, a belt tension device T1 for applying tension to the belt 10 is provided, and when the tension roller R1 moves to the side where the belt tension is increased, the movable pulley side of the split pulley 11b slides in the axial direction to increase the pulley width. The belt winding radius around the split pulley 11b becomes smaller, and the number of rotations transmitted to the hydraulic pump 11 increases. The movable pulley of the split pulley 11b is urged by a spring SP1 to slide in a direction to reduce the pulley width. Further, the tension roller R1 is rotatably attached to an L-shaped roller arm A1 rotatably pivoted, and swings around a pivot shaft. The end of the roller arm A1 on the side opposite to the side where the roller R1 is mounted and the long hole a of the operation plate A1 ′ integrated with the sub-transmission lever VL pivotally attached to the body are connected by a rod L1 via a spring SP1 ′. Are linked.
[0012]
Next, a hydraulic second pulley 11c is attached to the drive shaft 11a of the hydraulic pump 11 so as to rotate integrally with the outside of the split pulley 11b, and a split pulley similar to the split pulley 11b is mounted on the input shaft 6a of the transmission 6. 6b is attached so as to rotate integrally and change the pulley width. The transmission belt 12 is wound around the split pulley 6b and the hydraulic second pulley 11c. Then, a belt tension device T2 for applying tension to the belt 12 is provided, and when the tension roller R2 moves to the side where the belt tension is increased, the movable pulley side of the split pulley 6b slides in the axial direction to increase the pulley width. The radius of the belt wound around the split pulley 6b is reduced, and the number of rotations transmitted to the transmission case 6 is increased. The movable pulley of the split pulley 6b is urged by a spring SP2 to slide in a direction to reduce the pulley width. Further, the tension roller R2 is rotatably attached to an L-shaped roller arm A2 rotatably pivoted, and swings around a pivot shaft. An end of the roller arm A2 on the side opposite to the side where the roller R2 is mounted is connected to an operation plate A2 'integral with a sub-transmission lever VL pivotally attached to the machine by a rod L2 via a spring SP2'.
[0013]
The sub-transmission mechanism having the above configuration operates as follows by the sub-transmission lever VL. That is, when the sub-transmission lever VL is located at the lowest speed position P1, as shown in FIG. 5A, both the split pulley 11b on the hydraulic pump 11 side and the split pulley 6b on the transmission case 6 side A low-speed transmission state in which the belt winding radius is the maximum radius is achieved. This state is the lowest speed transmission state. Next, when the sub-transmission lever VL is shifted to the middle speed position P2, as shown in FIG. 5B, the tension device T1 on the hydraulic pump 11 side has the rod L1 with the elongated hole a of the operation plate A1 '. And the pulley 11b on the hydraulic pump 11 side remains in the low-speed transmission state. However, the split pulley 6b on the transmission case 6 side has a minimum belt winding radius because the rod L2 is pulled by the operation plate A2 'integrated with the auxiliary transmission lever VL, the roller arm A2 swings, and the tension roller R2 moves. The radius becomes the high-speed transmission state. This state is a medium speed transmission state. The speed change from the lowest speed transmission state to the middle speed transmission state can be operated in a stepless manner, and during this time, the number of rotations transmitted to the drive shaft 11a of the hydraulic pump 11 does not change (however, the engine accelerator is kept constant). ), The minimum operating speed of the hydraulic operating system (for example, the hydraulic cylinder 23) is maintained. Then, when the sub-transmission lever VL is shifted to the highest speed position P3, as shown in FIG. 5C, the tension device T1 on the hydraulic pump 11 side allows the rod L1 to move within the allowable range of the long hole a. At the end, the roller arm A1 swings, the tension roller R1 moves, and a high-speed transmission state in which the belt winding radius of the split pulley 11b on the hydraulic pump 11 side becomes the minimum radius is established. On the other hand, as described above, the tension pulley 6b of the split pulley 6b on the transmission case 6 side has already moved the tension roller R2 until the belt winding radius becomes the minimum radius. Is maintained. This state is the highest speed transmission state. The shift from the middle speed transmission state to the highest speed transmission state can also be operated steplessly, and the shift operation can be continuously performed from the lowest speed transmission state. Further, during this time, the number of rotations transmitted to the drive shaft 11a of the hydraulic pump 11 increases, and the operating speed of the hydraulic operating system such as the hydraulic cylinder 23 increases as the running speed increases. The followability of the lifting / lowering control of the transplant working machine 2 can be improved.
[0014]
The front wheels 4, 4 are mounted on the lower case 14 b of the front wheel transmission cases 14 a, 14 b connected and fixed to the left and right sides of the transmission case 6. Further, the front wheels 4, 4 are driven and rotated by being transmitted from the transmission case 6, and further, are steered and rotated in response to the rotation of the handle 15. When the handle 15 rotates, the arm 16 rotates in conjunction with the steering shaft 15a, and the arm 16 pivots with respect to the upper front wheel transmission case 14a via the rods 17, 17. In connection with 14b, 14b, the turning operation of the handle 15 is transmitted to the front wheels 4, 4.
[0015]
The rear wheels 5, 5 are provided with a rear wheel gear case 20, left and right ends of a rear wheel frame 19, which is rotatably mounted on a rolling shaft 18 fixed rearward at the center of the horizontal frame 7b at the rear end of the frame 7a. 20. Therefore, the rear wheels 5, 5 are configured to be able to roll around the rolling axis 18. The transmission to the rear wheels 5, 5 is performed after the power in the transmission case 6 is made to protrude rearward from two right and left rear end portions of the transmission case 6 via a rear wheel differential device in the transmission. The transmission is transmitted to the wheel drive shafts 21, 21, and the drive shafts 21, 21 and the input shafts 20 a, 20 a of the rear wheel gear cases 20, 20 are connected to the rear wheel transmission shafts 22, 22 having universal joints and expansion joints. Power is transmitted to the rear wheels 5,5.
[0016]
Reference numeral 23 denotes a hydraulic cylinder. The base side of the cylinder is supported by a bracket fixed to the frame 7a below the engine 3 and the tip of a piston rod has an upper link 24a of a link 24 connecting the traveling vehicle body 1 and the working machine 2. Are connected to an arm 25 integral with the arm. When the oil flows into and out of the hydraulic cylinder 23, the piston rod protrudes and retreats, the link 24 moves up and down with the traveling vehicle body 1 as a fulcrum, and the work implement moves up and down.
[0017]
The link 24 has an upper link 24a and lower links 24b, 24b connected to a traveling vehicle body side link base 24c fixed to the lateral frame 7b on the traveling vehicle body 1 side as a link rotation fulcrum. A work implement-side link base 24d that supports a fixed rolling connection shaft 27a so as to freely roll in the left and right directions is connected to the planting transmission case 27.
[0018]
Reference numeral 25 denotes a working machine transmission shaft, which transmits the rotational power of the PTO shaft protruding rearward from the rear side of the transmission case 6 to the input shaft of the working machine 2 via a universal joint and an expansion joint. Numeral 26 denotes a seedling mounting table, which is slidably mounted on a rail fixed to a planting portion transmission case 27 so that the front side is upper and the rear side is lower, so as to be slidable left and right. The seedling table 26 reciprocates left and right by a left-right reciprocating mechanism in the transmission case 27, and supplies seedlings one by one to the planting devices 28 in accordance with the planting cycle.
[0019]
The planting devices 28 are attached to the rear side of two planting transmission frames 29, 29 extending rearward from the left and right end sides of the planting portion transmission case 27, and are attached to the left and right sides by two lines. It is installed for the row plant. The power of the transmission case 27 is transmitted to the planting devices 28 of each strip via a chain transmission mechanism in the planting transmission frames 29, 29. The planting device 28 is composed of a rotating case 30 and two planting tools 31 attached thereto. Each of the two planting tools 31, 31 is provided with a planting claw, and the tip of the planting claw performs a motion of drawing an elliptical locus by rotation transmission of a gear train in the case accompanying rotation of the rotating case 30. The seedlings are taken one by one according to the supply of the seedlings on the platform 26 and planted in the field.
[0020]
32a, 32b, 32c are left, center, and right leveling floats, respectively, whose front ends are hung vertically below the planting transmission frames 29, 29 so that they can swing up and down, and level the mud surface of the planting field. I will slide while doing. The center leveling float 32b is connected to a spool of a hydraulic valve 23a that operates a hydraulic cylinder 23 that raises and lowers the work implement 2, and also serves as a sensor float for work implement elevation control.
[0021]
Reference numerals 34, 34 denote spare seedling mounts, which are mounted on the left and right sides of the machine, respectively. The left and right spare seedling mounts 34, 34 have the same configuration, and are specifically as follows. That is, the support frame 35 of the spare seedling mounting table 34 is formed in an inverted L-shape when viewed from the side, and its lower base is fixed to a bracket 35a fixed to the front side of the transmission case 6, and the free end is vertically A bearing member 35b that receives the rotation shaft 36 in the direction is fixed. In addition, seedling stands 37, 37 on which seedling boxes or seedlings are placed one by one, are fixedly supported by seedling stand frames 38a, 38b from below, and seedling stand frames 38, 38b, It is fixed to a rotation member 39 having a shaft hole passing through the rotation shaft 36. The shafts of the rotating member 39 and the shaft hole of the bearing member 35 b are vertically connected to each other and penetrate the rotating shaft 36, thereby rotating the seedling stands 37, 37 around the rotating shaft 36 on the support frame 35. Can be mounted freely. The locking plate portion 40a of the seedling fixing lever 40 is pivotally supported by a lever rotation support shaft 35d supported by brackets 35c fixed to the bearing member 35b. When the locking plate portion 40a of the lever 40 is engaged with one of the fixed positioning notches 39b of the rotating plate 39a fixed to the lower end of the rotating member 39, the seedling stands 37, 37 The rotation about the rotation shaft 36 is prevented. When the handle portion 40b of the lever is lifted, the locking plate portion 40a is disengaged from the notch portion 39b of the rotation plate 39a, and the rotation of the seedling stands 37, 37 around the rotation axis 36 is allowed. Then, by engaging with another notch 39b, the seedling stands 37, 37 can be fixed again in another posture. The notches 39b are provided at three locations.
[0022]
First, when engaging with the notch position X1, the seedling stands 37, 37 come close to the handle 15 and overlap the floor surfaces provided on the left and right sides of the front part of the vehicle body of the step floor 8 in plan view of the vehicle body. The seedling stands 37 are in the way to get on and off from the front of the fuselage after passing through the left and right sides of the steering wheel 15, but as shown in the drawing, the seedling stands 37 are provided on the side of the vehicle body when viewed from the side. The seedling stands 37 do not interfere with getting on and off from the side of the traveling vehicle body 1 using the getting on / off steps 8b, 8b because they are not overlapped above the sections 8b, 8b. When the right and left seedling stands 37 are located in this state, the spare seedlings are larger than the left and right maximum widths of the riding rice transplanter (the left and right widths of the seedling receiving frame 26a at the lower end of the seedling mounting table 26 of the seedling transplanting machine 2). The left and right widths of the mounting tables 34, 34 are narrow and enter the inside. Therefore, by moving the seedling stands 37 in this state during transportation and storage, the left and right widths of the body can be made smaller than before by utilizing the space on the floor surfaces on the left and right sides of the front part of the vehicle body, and the efficiency is improved. It can be transported and easily stored in narrow places. In addition, when the aircraft is advanced into and out of a narrow place, the seedling stands 37 can easily get off and on from the side of the vehicle body without being in the way.
[0023]
In addition, when engaging with the notch position X2, it moves to a state located outside in the left-right direction from the above state. Therefore, by moving the seedling stands 37 to this state during the work, the upper portions of the floor surfaces on both the left and right sides of the front part of the vehicle body are released, and when the seedlings in the ridge are mounted on the body, the passenger gets on and off from the front part of the vehicle body. Can be done easily. At this time, the horizontal portions 35 ', 35' of the support frames 35, 35 serve as handrails when getting on and off. If the left and right seedling stands 37 are positioned in this state, the left and right widths of the spare seedling stands 34 and 34 are wider than the left and right maximum widths of the riding rice transplanter. In addition to being able to get on and off, the front visibility is widened, and in particular, the confirmation of the alignment side markers 50, 50 on the adjacent planted streak, which tends to be difficult to see on the spare seedling mounts 34, 34, is also improved. When locked at the notch 39b (notch position X3), the longitudinal direction of the seedling stands 37 becomes the left-right lateral direction.
[Brief description of the drawings]
FIG. 1 is a plan view showing a riding rice transplanter of an embodiment.
FIG. 2 is a side view showing the riding rice transplanter of the embodiment.
FIG. 3 is a partial sectional side view of a spare seedling mounting table.
FIG. 4 is a partial sectional plan view of a spare seedling mounting table.
FIGS. 5A and 5B are explanatory views of a subtransmission mechanism, wherein FIG. 5A is a simplified side view of a lowest speed transmission state, FIG. 5B is a simplified side view of a middle speed transmission state, FIG. FIG.
[Explanation of symbols]
1: Running vehicle body 2: Seedling transplanting machine 4: Left and right front wheels 5: Left and right rear wheels 8: Step floor 9: Seat 24: Link 26: Seedling stand 34: Spare seedling stand 35: Support frame 37: Seedling stand 50: Side marker

Claims

A left and right step floor 8 having a floor surface extending from the front left and right sides of the seat 9 to the front of the vehicle body is provided on the traveling body 1 equipped with the left and right front wheels 4 and the left and right rear wheels 5, and is provided upright on the left and right outside of the left and right step floor 8. A spare seedling mounting 34 having a seedling mounting 37 on which the seedlings are mounted is mounted on the support frame 35 which has been mounted, and the seedling transplanting machine 2 equipped with the seedling mounting 26 is connected to the rear part of the traveling vehicle body 1 via a link 24 for riding. In the rice transplanter, the supporting frame 35 of the spare seedling mounting table 34 has a configuration in which the base extends forward and forward from the left and right ends from the left and right ends thereof in front of the front wheel 4 when viewed from the front of the body. A seedling stand 37 of the spare seedling mounting stand 34 is provided on a support frame 35 provided toward the vehicle, and the seedling stand 37 overlaps the floor surfaces on the left and right sides of the front part of the vehicle body in plan view of the vehicle body; State located more outward in the left-right direction And the outer end of the seedling stand 37 positioned outside is located outside the outer end of the seedling mount 26, and is aligned with the adjacent existing planting strip. A riding rice transplanter characterized in that it is located closer to the inside of the machine than the side marker 50 to be mounted.