JP2004089060A

JP2004089060A - Combine harvester

Info

Publication number: JP2004089060A
Application number: JP2002254258A
Authority: JP
Inventors: Shigeaki Maeda; 前田　滋昭; Tadamitsu Morihiro; 森広　忠光
Original assignee: Mitsubishi Agricultural Machinery Co Ltd
Current assignee: Mitsubishi Agricultural Machinery Co Ltd
Priority date: 2002-08-30
Filing date: 2002-08-30
Publication date: 2004-03-25
Anticipated expiration: 2022-08-30
Also published as: JP3853275B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester whose front treating section can be retreated and moved on a vertical axis as a support point, and which can simply form a stopper mechanism and can surely control the downward movement of the front treating section, when a stopper mechanism for limiting the downward movement of the front treating section on its retreating rotation is disposed. <P>SOLUTION: This combine harvester is characterized by rotatably supporting one end of a horizontal transmission cylinder 11 at the upper end of a vertical shaft 18, disposing a horizontal transmission cylinder-supporting member 15 capable of being integrally retreated and rotated together with the front treating section 2, and disposing a stopper mechanism 34 for limiting the downward movement of the front treating section 2, when the front treating section 2 is retreated and rotated, wherein the stopper mechanism 34 comprises a receiver 36 integrally disposed on the horizontal transmission cylinder 11 and a stopper pin 37 slidably supported on the horizontal transmission cylinder-supporting member 15, and wherein the sliding support portion 15a of the stopper 37 is disposed at a position just below the horizontal transmission cylinder 11 of the horizontal transmission cylinder-supporting member 15. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、前処理部を、機体前方に位置する作業姿勢と、縦軸を回動支点として機体前方から機体一側方へ退避する退避姿勢とに変姿自在に構成したコンバインの技術分野に属するものである。
【０００２】
【従来の技術】
近年、茎稈を刈り取る前処理部を、機体前方に位置する作業姿勢と、縦軸を回動支点として機体前方から機体一側方へ退避する退避姿勢とに変姿自在に構成したコンバインが提案されている（例えば、特開２００２−４２号公報）。
この種のコンバインでは、前処理部を機体一側方へ退避させることにより、走行機体の前方又は前処理部の後方が開放されるため、点検作業や清掃作業が容易になるという利点を有する。
【０００３】
【発明が解決しようとする課題】
ところで、上記コンバインでは、前処理部を退避回動させる場合、機体側の前処理昇降機構（リフトシリンダ）から前処理部を切離すため、退避回動時における前処理部の下降を規制するためにストッパ機構を設ける必要がある。
しかしながら、上記従来のコンバインでは、横伝動筒支持部にロック部材を回動自在に設けると共に、このロック部材を、横伝動筒支持部の受け部と、横伝動筒の受け部との間に挟み込むことによって前処理部の下降を規制している。そのため、ロック部材を回動自在に支持するだけでなく、横伝動筒及び横伝動筒支持部に受け部を設ける必要があり、構造の複雑化を招来する不都合がある。
また、退避回動時に前処理部が揺れたり、持ち上がったりすると、ロック部材が外れ、前処理部が下降してしまう可能性がある。
【０００４】
【課題を解決するための手段】
本発明は、上記の如き実情に鑑みこれらの課題を解決することを目的として創作されたものであって、走行機体の前部に、横伝動筒を回動支点として昇降する前処理部を設けると共に、該前処理部を、機体前方に位置する作業姿勢と、縦軸を回動支点として機体前方から機体一側方へ退避する退避姿勢とに変姿自在に構成したコンバインにおいて、前記縦軸の上端部に、前記横伝動筒の一端部を回動自在に支持し、かつ、前記前処理部と一体的に退避回動する横伝動筒支持部を設けると共に、この横伝動筒支持部と横伝動筒との間に、退避回動時における前処理部の下降を規制するストッパ機構を構成するにあたり、該ストッパ機構を、横伝動筒に一体的に設けられる受け部と、横伝動筒支持部にスライド自在に支持されるストッパピンとの接当により、前処理部の下降を規制するように構成し、さらに、前記ストッパピンのスライド支持部を、横伝動筒支持部の横伝動筒直下位置に設けたことを特徴とする。つまり、横伝動筒に一体的に設けられる受け部と、横伝動筒支持部にスライド自在に支持されるストッパピンとの接当により、前処理部の下降を規制するため、従来のように横伝動筒及び横伝動筒支持部に受け部を設ける必要がなく、構造の簡略化を図ることができる。しかも、前記ストッパピンのスライド支持部を、横伝動筒支持部の横伝動筒直下位置に設けたため、横伝動筒支持部の中心部でストッパピンを強固に支持することができる。
また、前記受け部は、前記ストッパピンとの接当部分が、ストッパピンの外周形状に合わせて円弧状に形成されていることを特徴とする。この場合においては、ストッパピンと受け部との接当面積を広く確保し、前処理部の荷重を確実に受止めることができる。
【０００５】
【発明の実施の形態】
次に、本発明の実施の形態の一つを図面に基づいて説明する。図面において、１はコンバインであって、該コンバイン１は、茎稈を刈り取る前処理部２と、刈り取った茎稈から穀粒を脱穀し、かつ、脱穀した穀粒を選別する脱穀部３と、選別した穀粒を貯溜する穀粒タンク４と、脱穀済みの排稈を排出処理する後処理部５と、運転席６及び各種操作具が配置される操作部７と、クローラ式の走行部（図示せず）とを備える。
【０００６】
前処理部２は、茎稈を分草するデバイダ８と、茎稈を引き起す引起し装置９と、茎稈の株元を切断する刈刃装置（図示せず）と、刈り取った茎稈を脱穀部３に向けて搬送する茎稈搬送装置１０とを備える。前処理部２の後部には、左右方向を向く横伝動筒１１が設けられ、その右端部（操作部７側の端部）に入力プーリ１２を備える。入力プーリ１２は、図示しない伝動ベルトを介して、走行機体側から前処理動力を入力し、その動力が横伝動筒１１及び縦伝動筒１３を介して上記の各装置９、１０に供給される。
【０００７】
横伝動筒１１の左右両端部は、機体フレーム１４に設けられる横伝動筒支持部材（横伝動筒支持部）１５及び分割ホルダ１６によって回動自在に支持されている。これにより、横伝動筒１１を回動支点とする前処理部２の昇降動作が許容される。また、機体フレーム１４と縦伝動筒１３との間には、リフトシリンダ１７が介設されており、このリフトシリンダ１７を油圧伸縮動作させることによって、前処理部２の強制的な昇降動作が行われる。
【０００８】
本発明のコンバイン１は、図１及び図２に示すように、前処理部２を、機体前方に位置する作業姿勢と、後述する縦軸１８を回動支点として機体前方から機体一側方（左側方）へ退避する退避姿勢とに変姿させるための構成を有しており、以下、その構成を詳細に説明する。
【０００９】
図３に示すように、機体フレーム１４は、平面視長方形に枠組みされた枠フレームを構成しており、その前端部左側には、前処理支持部１４ａが立設されている。前処理支持部１４ａは、左右一対の支柱フレーム１９、２０と、その上端部同士を連結する梁フレーム２１と、支柱フレーム１９、２０の倒れを防ぐ左右一対の補強フレーム２２、２３とを備えて構成される。左右一対の支柱フレーム１９、２０のうち、左側の支柱フレーム１９は、筒部材を用いて構成されており、ここに前記縦軸１８が回動自在に支持される。
【００１０】
機体フレーム１４の下部には、下方に延出する複数の連結フレーム２４を介して、走行フレーム２５が設けられており、この走行フレーム２５に走行部が組付けられる。前側の連結フレーム２４は、リフトシリンダ１７の取付フレームに兼用されており、連結フレーム２４から前方に延びるリフトシリンダ１７は、そのロッド先端部が前処理部２の縦伝動筒１３に連結される。この連結は、縦伝動筒１３側のブラケット２６及びリフトシリンダ１７のロッド先端部を貫通するピン２７と、該ピン２７を抜止めするスナップピン２８とを用いて行われる。これにより、前処理部２を退避回動させる際、前処理部２とリフトシリンダ１７との切離しが容易になる。
【００１１】
図５に示すように、左側支柱フレーム１９の上端部及び下端部には、それぞれプレート２９、３０が溶着されている。縦軸１８の下端部は、下側プレート３０によって回動自在に嵌合支持される一方、縦軸１８の上端部は、ボス３１によって回動自在に嵌合支持される。ボス３１は、上側プレート２９に位置調整自在に取付けられる調整プレート３２に溶着され、該調整プレート３２の位置変更により、下側プレート３０との芯合せが行われる。
【００１２】
縦軸１８の上端には、前述した横伝動筒支持部材１５が一体的に溶着される。横伝動筒支持部材１５の底面には、円座３３がボルト固定されており、この円座３３の底面が、調整プレート３２の上面で摺動自在に支持される。これにより、縦軸１８を支点とする横伝動筒支持部材１５の回動が可能になる。また、横伝動筒支持部材１５と横伝動筒１１との間には、ストッパ機構３４が構成されており、このストッパ機構３４をロック操作することにより、退避回動時における前処理部２の下降が規制される。
【００１３】
一方、右側支柱フレーム２０の上端部には、図６に示すようにプレート３５が溶着され、このプレート３５に、前述した分割ホルダ１６がボルト固定される。分割ホルダ１６は、プレート３５に固定される固定部１６ａと、該固定部１６ａに支軸１６ｂを介して回動自在に設けられる可動部１６ｃとを備えて構成される。可動部１６ｃは、通常、ボルト１６ｄで固定部１６ａに固定され、横伝動筒１１を回動自在に支持するが、ボルト１６ｄを外し、可動部１６ｃを前下方へ回動させると、分割ホルダ１６による横伝動筒１１の支持が解除される。
【００１４】
即ち、前処理部２を機体一側方へ退避回動させる場合は、前処理部２をストッパ機構３４のロック位置よりも上昇させて、ストッパ機構３４により前処理部２の下降を規制した後、スナップピン２８を外し、前処理部２とリフトシリンダ１７の連結を解除する。次に、入力プーリ１２から伝動ベルトを外すと共に、分割ホルダ１６の可動部１６ｃを前下方に回動させ、分割ホルダ１６による横伝動筒１１の支持を解除する。その後、前処理部２を機体の一側方へ押し操作又は引き操作すると、縦軸１８を回動支点として前処理部２を機体一側方に退避させることが可能になる。
【００１５】
次に、ストッパ機構３４の構成を詳細に説明する。図７及び図８に示すように、ストッパ機構３４は、横伝動筒１１に一体的に溶着される受け部３６と、横伝動筒支持部材１５のスライド支持部（ボス）１５ａでスライド自在（横伝動筒方向）に支持されるストッパピン３７とを備えて構成される。ストッパピン３７の外周には、軸方向に所定間隔を存して２本の係止溝３７ａ、３７ｂが形成される一方、スライド支持部１５ａには、係止ボルト３８が螺入されており、この係止ボルト３８で係止溝３７ａ、３７ｂを選択的に係止することにより、ストッパピン３７が非ロック位置とロック位置とに保持される。
【００１６】
ストッパピン３７が非ロック位置に保持された状態では、ストッパピン３７の右端部が横伝動筒支持部材１５から突出しない。従って、受け部３６及び横伝動筒１１の回動が許容され、前処理部２を昇降範囲の全域で昇降動作させることが可能になる。一方、ストッパピン３７がロック位置に保持された状態では、ストッパピン３７の右端部が横伝動筒支持部材１５から突出する。このときストッパピン３７は、受け部３６の下降方向への回動を接当規制することにより、前処理部２を所定の高さで下降規制することになる。
【００１７】
つまり、横伝動筒１１に一体的に設けられる受け部３６と、横伝動筒支持部材１５にスライド自在に支持されるストッパピン３７との接当により、前処理部２の下降を規制するように構成されるため、従来のように横伝動筒１１と横伝動筒支持部材１５との両方に受け部を設ける必要がなくなり、構造の簡略化を図ることが可能になる。また、スライド支持されるストッパピン３７は、退避回動時に前処理部２が揺れたり、持ち上がったりしても、回動式のストッパ部材に比べて位置が変化しにくく、しかも、本実施形態では、ストッパピン３７を係止ボルト３８で位置保持するため、前処理部２を確実に下降規制することができる。
【００１８】
また、受け部３６は、ストッパピン３７との接当面３６ａが、ストッパピン３７の外周形状に合わせて円弧状に形成されている。これにより、ストッパピン３７と受け部３６との接当面積を広く確保し、前処理部２の荷重を確実に受止めることが可能になる。
【００１９】
また、受け部３６は、前処理部２が下降規制位置よりも下降しているとき、ストッパピン３７の突出操作（ロック位置への操作）を接当規制するように形状が設定されている。そのため、ストッパピン３７の誤操作を防止し、前処理部２を確実に下降規制することができる。
【００２０】
ところで、横伝動筒支持部材１５は、横伝動筒１１を回動自在に支持する円筒状の回動支持部１５ｂと、縦軸１８の上端部に溶着されるベース部１５ｃと、この両部１５ｂ、１５ｃを一体的に繋ぐ連結部１５ｄとを有する。そして、この横伝動筒支持部材１５にストッパピン３７のスライド支持部１５ａを形成するにあたり、スライド支持部１５ａは、横伝動筒支持部材１５の横伝動筒直下位置（回動支持部１５ｂの直下位置）に形成される。そのため、横伝動筒支持部材１５の中心部でストッパピン３７を強固に支持することが可能になる。しかも、本実施形態では、側面視において、縦軸１８の軸芯延長線上に、ストッパピン３７及び横伝動筒１１の軸芯が位置するため、縦軸１８に偏荷重が作用することを避け、前処理部２の退避回動を円滑にすることができる。
【００２１】
叙述の如く構成されたものにおいて、コンバイン１は、走行機体の前部に、横伝動筒１１を回動支点として昇降する前処理部２を設けると共に、該前処理部２を、機体前方に位置する作業姿勢と、縦軸１８を回動支点として機体前方から機体一側方へ退避する退避姿勢とに変姿自在に構成している。そして、コンバイン１においては、縦軸１８の上端部に、横伝動筒１１の一端部を回動自在に支持し、かつ、前処理部２と一体的に退避回動する横伝動筒支持部材１５を設けると共に、この横伝動筒支持部材１５と横伝動筒１１との間に、退避回動時における前処理部２の下降を規制するストッパ機構３４を構成するにあたり、該ストッパ機構３４を、横伝動筒１１に一体的に設けられる受け部３６と、横伝動筒支持部材１５にスライド自在に支持されるストッパピン３７との接当により、前処理部２の下降を規制するように構成している。そのため、回動式のロック部材で前処理部２を下降規制する従来のもののように、横伝動筒１１と横伝動筒支持部材１５の両方に受け部を設ける必要がなく、その結果、構造の簡略化を図ることができる。
【００２２】
しかも、ストッパピン３７のスライド支持部１５ａは、横伝動筒支持部材１５の横伝動筒直下位置に設けられるため、横伝動筒支持部材１５の中心部でストッパピン３７を強固に支持することができ、その結果、前処理部２の荷重でストッパピン３７や横伝動筒支持部材１５が変形するなどの不都合を回避することができる。
【００２３】
また、受け部３６は、ストッパピン３７との接当面３６ａが、ストッパピン３７の外周形状に合わせて円弧状に形成されるため、ストッパピン３７と受け部３６との接当面積を広く確保し、前処理部２の荷重を確実に受止めることができる。
【図面の簡単な説明】
【図１】コンバインの平面図である。
【図２】前処理部を退避回動させたコンバインの平面図である。
【図３】機体フレームの斜視図である。
【図４】前処理支持部の正面図である。
【図５】前処理支持部の一部を断面した側面図である。
【図６】分割ホルダの側面図である。
【図７】横伝動筒支持部材及びストッパ機構を示す正面図である。
【図８】図７のＡ−Ａ矢視図である。
【符号の説明】
１　　　コンバイン
２　　　前処理部
１１　　横伝動筒
１２　　入力プーリ
１４　　機体フレーム
１４ａ　前処理支持部
１５　　横伝動筒支持部材
１５ａ　スライド支持部
１６　　分割ホルダ
１７　　リフトシリンダ
１８　　縦軸
１９　　左側支柱フレーム
２０　　右側支柱フレーム
３４　　ストッパ機構
３６　　受け部
３６ａ　接当面
３７　　ストッパピン
３８　　係止ボルト[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to the technical field of a combine which is configured such that a pre-processing unit can be freely transformed into a working posture positioned in front of the fuselage and a retracting posture retracting from the front of the fuselage to one side of the fuselage with the vertical axis as a fulcrum. Belong to.
[0002]
[Prior art]
In recent years, a combine has been proposed, in which the pre-processing unit that cuts stem culms can be freely transformed into a working posture located in front of the fuselage and an evacuation posture retracting from the front of the fuselage to one side of the fuselage with the vertical axis as a pivot point. (For example, JP-A-2002-42).
This type of combine has the advantage that the retreating of the pre-processing unit to one side of the body opens the front of the traveling body or the rear of the pre-processing unit, thereby facilitating inspection work and cleaning work.
[0003]
[Problems to be solved by the invention]
By the way, in the above-mentioned combine, when the pre-processing unit is retracted and rotated, the pre-processing unit is separated from the pre-processing elevating mechanism (lift cylinder) on the machine body side, so that the lowering of the pre-processing unit during the retraction rotation is performed. Need to be provided with a stopper mechanism.
However, in the above-described conventional combine, a lock member is rotatably provided on the horizontal transmission tube support portion, and the lock member is sandwiched between the receiving portion of the horizontal transmission tube support portion and the reception portion of the horizontal transmission tube. This restricts the lowering of the preprocessing section. Therefore, it is necessary not only to support the lock member rotatably but also to provide a receiving portion on the lateral transmission cylinder and the lateral transmission cylinder support portion, and there is a disadvantage that the structure becomes complicated.
Also, if the pre-processing unit shakes or lifts during the evacuation rotation, there is a possibility that the lock member comes off and the pre-processing unit descends.
[0004]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has been created with the object of solving these problems. In the front part of a traveling body, a pre-processing unit that moves up and down with a horizontal transmission cylinder as a pivot point is provided. In addition, the combiner is configured such that the pre-processing unit can be freely transformed into a working posture located in front of the fuselage and a retracting posture retracting from the front of the fuselage to one side of the fuselage with the vertical axis as a pivot point. At the upper end of the horizontal transmission cylinder, one end of the horizontal transmission cylinder is rotatably supported, and a horizontal transmission cylinder support that retreats and rotates integrally with the preprocessing unit is provided. In forming a stopper mechanism for restricting the lowering of the pre-processing unit during the evacuation rotation between the horizontal transmission cylinder and the horizontal transmission cylinder, the stopper mechanism includes a receiving portion provided integrally with the horizontal transmission cylinder, and a horizontal transmission cylinder support. With a stopper pin slidably supported by the Those with, and configured to regulate the descent of the pre-processing unit, further, the slide support portion of the stopper pin, and wherein the provided next transmission cylinder position directly below the transverse transmission cylinder support. In other words, the contact between the receiving portion provided integrally with the horizontal transmission cylinder and the stopper pin slidably supported by the horizontal transmission cylinder support portion restricts the lowering of the pre-processing portion. There is no need to provide a receiving portion on the cylinder and the lateral transmission cylinder supporting portion, and the structure can be simplified. In addition, since the slide support portion of the stopper pin is provided at a position directly below the horizontal transmission cylinder support portion of the horizontal transmission cylinder support portion, the stopper pin can be strongly supported at the center of the horizontal transmission cylinder support portion.
Further, the receiving portion is characterized in that a contact portion with the stopper pin is formed in an arc shape in accordance with an outer peripheral shape of the stopper pin. In this case, a large contact area between the stopper pin and the receiving portion can be ensured, and the load of the pretreatment portion can be reliably received.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a combine, the combine 1 is a pre-processing unit 2 for cutting stem culm, a threshing unit 3 for threshing grain from the cut stem and culling, and selecting threshed grain. A grain tank 4 for storing the selected grains, a post-processing unit 5 for discharging threshed culms, an operating unit 7 in which a driver's seat 6 and various operating tools are arranged, and a crawler-type running unit ( (Not shown)).
[0006]
The pre-processing unit 2 includes a divider 8 for weeding the stem, a raising device 9 for raising the stem, a cutting blade device (not shown) for cutting the stem of the stem, and a cut-stem. And a stem / culm conveying device 10 that conveys toward the threshing unit 3. At the rear of the pre-processing unit 2, a horizontal transmission cylinder 11 is provided which faces in the left-right direction, and has an input pulley 12 at the right end (the end on the operation unit 7 side). The input pulley 12 inputs preprocessing power from the traveling machine body via a transmission belt (not shown), and the power is supplied to the above-described devices 9 and 10 via the horizontal transmission cylinder 11 and the vertical transmission cylinder 13. .
[0007]
The left and right ends of the horizontal transmission cylinder 11 are rotatably supported by a horizontal transmission cylinder support member (horizontal transmission cylinder support) 15 and a split holder 16 provided on the body frame 14. This allows the pre-processing unit 2 to move up and down using the horizontal transmission cylinder 11 as a pivot point. A lift cylinder 17 is interposed between the body frame 14 and the vertical transmission cylinder 13, and by forcibly expanding and contracting the lift cylinder 17, the forcible vertical movement of the pre-processing unit 2 is performed. Is
[0008]
As shown in FIG. 1 and FIG. 2, the combine 1 of the present invention uses the pre-processing unit 2 as a work posture positioned in front of the fuselage and a longitudinal axis 18 described later as a pivot point from the front of the fuselage to one side of the fuselage ( It has a configuration for changing to a retreat posture for retreating to the left side), and the configuration will be described in detail below.
[0009]
As shown in FIG. 3, the body frame 14 constitutes a frame frame which is framed in a rectangular shape in a plan view, and a pre-processing support portion 14a is provided upright on the left side of its front end. The pre-processing support portion 14a includes a pair of left and right support frames 19, 20, a beam frame 21 connecting the upper ends thereof, and a pair of left and right reinforcement frames 22, 23 for preventing the support frames 19, 20 from falling down. Be composed. The left support frame 19 of the pair of right and left support frames 19 and 20 is formed using a cylindrical member, and the vertical axis 18 is rotatably supported here.
[0010]
A traveling frame 25 is provided at a lower portion of the body frame 14 via a plurality of connecting frames 24 extending downward, and a traveling section is attached to the traveling frame 25. The front connection frame 24 is also used as a mounting frame for the lift cylinder 17. The lift cylinder 17 extending forward from the connection frame 24 has its rod tip connected to the vertical transmission cylinder 13 of the preprocessing unit 2. This connection is performed using a pin 27 that penetrates the bracket 26 on the side of the vertical transmission cylinder 13 and the rod end of the lift cylinder 17, and a snap pin 28 that stops the pin 27. Thereby, when the pre-processing unit 2 is retracted and rotated, the pre-processing unit 2 and the lift cylinder 17 can be easily separated from each other.
[0011]
As shown in FIG. 5, plates 29 and 30 are welded to the upper and lower ends of the left support frame 19, respectively. The lower end of the vertical axis 18 is rotatably fitted and supported by the lower plate 30, while the upper end of the vertical axis 18 is rotatably fitted and supported by the boss 31. The boss 31 is welded to an adjustment plate 32 that is attached to the upper plate 29 so as to be adjustable in position. By changing the position of the adjustment plate 32, the boss 31 is aligned with the lower plate 30.
[0012]
At the upper end of the vertical axis 18, the above-mentioned horizontal transmission cylinder support member 15 is integrally welded. A circular seat 33 is bolted to the bottom surface of the lateral transmission cylinder support member 15, and the bottom surface of the circular seat 33 is slidably supported on the upper surface of the adjustment plate 32. Thereby, the rotation of the horizontal transmission cylinder support member 15 about the vertical axis 18 as a fulcrum becomes possible. Further, a stopper mechanism 34 is formed between the horizontal transmission cylinder support member 15 and the horizontal transmission cylinder 11, and by locking the stopper mechanism 34, the pre-processing unit 2 is lowered during the evacuation rotation. Is regulated.
[0013]
On the other hand, as shown in FIG. 6, a plate 35 is welded to the upper end of the right support frame 20, and the above-mentioned divided holder 16 is fixed to this plate 35 by bolts. The split holder 16 includes a fixed portion 16a fixed to the plate 35, and a movable portion 16c rotatably provided on the fixed portion 16a via a support shaft 16b. The movable portion 16c is normally fixed to the fixed portion 16a with a bolt 16d, and rotatably supports the lateral transmission cylinder 11. When the bolt 16d is removed and the movable portion 16c is rotated forward and downward, the divided holder 16c is rotated. Is released from the support of the lateral transmission cylinder 11.
[0014]
That is, when the pre-processing unit 2 is retracted and rotated to one side of the body, the pre-processing unit 2 is raised above the locked position of the stopper mechanism 34, and the stopper mechanism 34 restricts the lowering of the pre-processing unit 2. Then, the snap pins 28 are removed, and the connection between the pre-processing unit 2 and the lift cylinder 17 is released. Next, the transmission belt is detached from the input pulley 12, and the movable portion 16c of the divided holder 16 is rotated forward and downward to release the support of the horizontal transmission cylinder 11 by the divided holder 16. Thereafter, when the pre-processing unit 2 is pushed or pulled to one side of the machine, the pre-processing unit 2 can be retracted to one side of the machine using the vertical axis 18 as a pivot.
[0015]
Next, the configuration of the stopper mechanism 34 will be described in detail. As shown in FIGS. 7 and 8, the stopper mechanism 34 is slidable (horizontal) by a receiving portion 36 integrally welded to the horizontal transmission cylinder 11 and a slide support portion (boss) 15 a of the horizontal transmission cylinder support member 15. And a stopper pin 37 supported in the direction of the transmission cylinder. On the outer periphery of the stopper pin 37, two locking grooves 37a and 37b are formed at a predetermined interval in the axial direction, while a locking bolt 38 is screwed into the slide support portion 15a. By selectively locking the locking grooves 37a and 37b with the locking bolt 38, the stopper pin 37 is held at the unlocked position and the locked position.
[0016]
When the stopper pin 37 is held at the unlocked position, the right end of the stopper pin 37 does not protrude from the lateral transmission cylinder support member 15. Therefore, the rotation of the receiving portion 36 and the lateral transmission cylinder 11 is allowed, and the preprocessing portion 2 can be moved up and down over the entire range of the up and down range. On the other hand, when the stopper pin 37 is held at the lock position, the right end of the stopper pin 37 protrudes from the lateral transmission cylinder support member 15. At this time, the stopper pin 37 restricts the rotation of the receiving portion 36 in the descending direction, thereby restricting the pre-processing portion 2 at a predetermined height.
[0017]
That is, the lowering of the pre-processing unit 2 is restricted by the contact between the receiving part 36 provided integrally with the lateral transmission cylinder 11 and the stopper pin 37 slidably supported by the lateral transmission cylinder support member 15. With such a configuration, it is not necessary to provide receiving portions on both the lateral transmission cylinder 11 and the lateral transmission cylinder support member 15 as in the related art, and the structure can be simplified. In addition, even if the pre-processing unit 2 swings or lifts during the evacuation rotation, the position of the slide-supported stopper pin 37 is less likely to change as compared with the rotation type stopper member. Since the position of the stopper pin 37 is held by the locking bolt 38, the lowering of the pretreatment section 2 can be reliably performed.
[0018]
The receiving portion 36 has a contact surface 36 a with the stopper pin 37 formed in an arc shape in accordance with the outer peripheral shape of the stopper pin 37. Thus, a large contact area between the stopper pin 37 and the receiving portion 36 is ensured, and the load of the preprocessing portion 2 can be reliably received.
[0019]
Further, the shape of the receiving portion 36 is set so that the protruding operation of the stopper pin 37 (the operation to the lock position) is restricted when the pre-processing portion 2 is lower than the lowering restricting position. Therefore, erroneous operation of the stopper pin 37 can be prevented, and the lowering of the pre-processing unit 2 can be reliably suppressed.
[0020]
Incidentally, the horizontal transmission tube support member 15 includes a cylindrical rotation support portion 15b that rotatably supports the horizontal transmission tube 11, a base portion 15c welded to the upper end of the vertical axis 18, and these two portions 15b. , 15c. When forming the slide support portion 15a of the stopper pin 37 on the horizontal transmission cylinder support member 15, the slide support portion 15a is positioned directly below the horizontal transmission cylinder of the horizontal transmission cylinder support member 15 (directly below the rotation support portion 15b). ). Therefore, the stopper pin 37 can be firmly supported at the center of the lateral transmission cylinder support member 15. Moreover, in the present embodiment, since the stopper pin 37 and the axis of the lateral transmission cylinder 11 are located on the extension of the axis of the vertical axis 18 in a side view, it is possible to prevent the eccentric load from acting on the vertical axis 18. The retreat rotation of the preprocessing unit 2 can be made smooth.
[0021]
In the structure configured as described above, the combine 1 is provided with a pre-processing unit 2 that moves up and down with the horizontal transmission cylinder 11 as a rotation fulcrum at the front of the traveling body, and positions the pre-processing unit 2 in front of the body. And a retracting posture for retreating from the front of the fuselage to one side of the fuselage using the vertical axis 18 as a rotation fulcrum. In the combine 1, one end of the horizontal transmission cylinder 11 is rotatably supported on the upper end of the longitudinal axis 18, and the horizontal transmission cylinder support member 15 that retreats and rotates integrally with the preprocessing unit 2. And a stopper mechanism 34 for restricting the lowering of the pre-processing unit 2 during the retreat rotation between the lateral transmission cylinder support member 15 and the lateral transmission cylinder 11 is provided. The receiving unit 36 provided integrally with the transmission cylinder 11 and a stopper pin 37 slidably supported by the horizontal transmission cylinder support member 15 are configured to restrict the lowering of the pre-processing unit 2 by contact. I have. Therefore, unlike the related art in which the pretreatment unit 2 is controlled to be lowered by the rotating lock member, it is not necessary to provide the receiving portions on both the lateral transmission cylinder 11 and the lateral transmission cylinder support member 15, and as a result, Simplification can be achieved.
[0022]
In addition, since the slide support portion 15a of the stopper pin 37 is provided at a position directly below the horizontal transmission cylinder of the horizontal transmission cylinder support member 15, the stopper pin 37 can be firmly supported at the center of the horizontal transmission cylinder support member 15. As a result, it is possible to avoid inconveniences such as deformation of the stopper pin 37 and the lateral transmission cylinder support member 15 due to the load of the preprocessing unit 2.
[0023]
In addition, since the contact surface 36a of the receiving portion 36 with the stopper pin 37 is formed in an arc shape according to the outer peripheral shape of the stopper pin 37, a large contact area between the stopper pin 37 and the receiving portion 36 is ensured. Thus, the load of the pre-processing unit 2 can be reliably received.
[Brief description of the drawings]
FIG. 1 is a plan view of a combine.
FIG. 2 is a plan view of a combine in which a pre-processing unit is retracted and rotated.
FIG. 3 is a perspective view of a body frame.
FIG. 4 is a front view of a preprocessing support unit.
FIG. 5 is a side view in which a part of a pretreatment support section is sectioned.
FIG. 6 is a side view of a split holder.
FIG. 7 is a front view showing a lateral transmission cylinder support member and a stopper mechanism.
FIG. 8 is a view taken in the direction of arrows AA in FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combine 2 Pre-processing part 11 Horizontal transmission cylinder 12 Input pulley 14 Body frame 14a Pre-processing support part 15 Horizontal transmission cylinder support member 15a Slide support part 16 Split holder 17 Lift cylinder 18 Vertical axis 19 Left support frame 20 Right support frame 34 Stopper Mechanism 36 receiving portion 36a contact surface 37 stopper pin 38 locking bolt

Claims

At the front of the traveling body, there is provided a pre-processing unit that moves up and down with the horizontal transmission cylinder as a rotation fulcrum, and the pre-processing unit is provided with a working posture located in front of the body and a vertical axis as a rotation fulcrum. In a combine constructed so as to be able to freely change to a retracting posture for retreating to one side, one end of the horizontal transmission cylinder is rotatably supported at the upper end of the longitudinal axis, and is integrated with the pre-processing unit. In addition to providing a lateral transmission cylinder support portion that retreats and rotates, and configuring a stopper mechanism between the lateral transmission tube support portion and the lateral transmission tube, the stopper mechanism restricting the lowering of the preprocessing unit during the retraction rotation. The stopper mechanism is configured to restrict the lowering of the pre-processing unit by abutment of a receiving portion provided integrally with the lateral transmission tube and a stopper pin slidably supported by the lateral transmission tube support portion, Further, the slide support portion of the stopper pin is Combine, characterized in that provided in the lateral transmission cylinder position directly below the transverse transmission cylinder support.

2. The combine according to claim 1, wherein the contact portion of the receiving portion with the stopper pin is formed in an arc shape in accordance with an outer peripheral shape of the stopper pin. 3.