JP5838583B2

JP5838583B2 - Riding lawn mower

Info

Publication number: JP5838583B2
Application number: JP2011100851A
Authority: JP
Inventors: 和幸栗田; 榎本　和加雄; 和加雄榎本
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2011-04-28
Filing date: 2011-04-28
Publication date: 2016-01-06
Anticipated expiration: 2031-04-28
Also published as: JP2012231696A

Description

本発明は、乗用型の草刈機で所謂ハイダンプ式の集草容器を備えるものに関する。 The present invention relates to a riding type mower having a so-called high dump type grass collection container.

特許文献１には、集草容器を上昇させ、次いで、集草容器の蓋を開いて集草容器内の草を排出する所謂ハイダンプ式の乗用型の草刈機について記載されている。 Patent Document 1 describes a so-called high-dump riding mower that raises a grass collecting container and then opens the lid of the grass collecting container to discharge the grass in the grass collecting container.

特開２００６−９４７７３号公報JP 2006-94773 A

集草容器を昇降させるシリンダと集草容器の蓋を開閉する蓋のシリンダは別個のものであり、それぞれ別の操作レバーで昇降・開閉を行なっていたが、誤操作のもとである。
本発明は、集草容器の昇降・開閉操作をし易くすることを課題とする。また、迅速に昇降・開閉動作を行なうことを課題とする。 The cylinder for raising and lowering the grass collection container and the cylinder for the lid for opening and closing the lid of the grass collection container are separate, and each of them is moved up and down and opened and closed by different operating levers.
This invention makes it a subject to make it easy to raise / lower and open / close a grass container. It is another object of the present invention to quickly move up and down and open and close.

この発明は、かかる技術的課題を解決するために次のような技術的手段を構成した。すなわち、請求項１の発明では、
草刈部（８）と、走行車体（１）の後部に集草容器（９）を備えた乗用型草刈機において、
集草容器（９）は上下方向に昇降アーム（１２）で昇降すると共に、開閉蓋（１４）を開閉可能に構成し、
昇降アーム（１２）は昇降用シリンダ（１３）により昇降する構成とし、開閉蓋（１４）は開閉用シリンダ（１５）で開閉する構成とし、
昇降用シリンダ（１３）を伸縮させるバルブ及び開閉用シリンダ（１５）を伸縮させるバルブを操作する操作レバー（３３）を設け、操作レバー（３３）は操作ガイドに沿って移動する構成とし、操作ガイドは昇降用シリンダ（１３）を操作するための第一操作ガイド（３０）と、開閉用シリンダ（１５）を操作するための第二操作ガイド（３１）と、昇降用シリンダ（１３）及び開閉用シリンダ（１５）を共に操作するための第三操作ガイド（３２）を設け、
第一操作ガイド（３０）と第二操作ガイド（３１）と第三操作ガイド（３２）はそれぞれ並列して設け、各操作ガイドそれぞれの中央位置を中立位置とし、該それぞれの中立位置は移動ガイド（３４）で連通する構成とし、操作レバー（３３）が各操作ガイド間を移動自在に構成し、
昇降用シリンダ（１３）を伸縮させるバルブを操作する第一バルブ操作体（３６）と、操作レバー（３３）が係合して動作する第一係合プレート（３８）を連結し、
開閉用シリンダ（１５）を伸縮させるバルブを操作する第二バルブ操作体（３７）と、操作レバー（３３）が係合して動作する第二係合プレート（３９）を連結し、
第一係合プレート（３８）と第二係合プレート（３９）には、それぞれ操作レバー（３３）を前後から挟むように形成する係合部（３８ａ，３９ａ）と、操作レバー（３３）が移動ガイド（３４）に沿って移動するための移動孔（３８ｂ，３９ｂ）を形成し、
第一係合プレート（３８）の係合部（３８ａ）の先端部と、第二係合プレート（３９）の係合部（３９ａ）の先端部が平面視で重複する構成とし、
第一操作ガイド（３０）に沿って操作レバー（３３）を操作すると、操作レバー（３３）と第一係合プレート（３８）の係合部（３８ａ）との係合により、第一係合プレート（３８）が動作し、昇降用シリンダ（１３）を伸縮させ、
第二操作ガイド（３１）に沿って操作レバー（３３）を操作すると、操作レバー（３３）と第二係合プレート（３９）の係合部（３９ａ）との係合により、第二係合プレート（３９）が動作し、開閉用シリンダ（１５）を伸縮させ、
第三操作ガイド（３２）に沿って操作レバー（３３）を操作すると、操作レバー（３３）が第一係合プレート（３８）の係合部（３８ａ）及び第二係合プレート（３９）の係合部（３９ａ）の両方との係合により、第一係合プレート（３８）及び第二係合プレート（３９）の両方が共に動作し、昇降用シリンダ（１３）及び開閉用シリンダ（１５）を伸縮させる構成とし、
操作レバー（３３）を第一操作ガイド（３０）の中立位置から一方に沿って操作すると集草容器（９）が上昇側に作動し、第一操作ガイド（３０）の中立位置から他方に沿って操作すると集草容器（９）が下降側に作動し、
操作レバー（３３）を第二操作ガイド（３１）の中立位置から一方に沿って操作すると開閉蓋（１４）が開き側に作動し、操作レバー（３３）を第二操作ガイド（３１）の中立位置から他方に沿って操作すると開閉蓋（１４）が閉じ側に作動し、
操作レバー（３３）を第三操作ガイド（３２）の中立位置から一方に沿って操作すると、集草容器（９）が上昇側、かつ、開閉蓋（１４）が開き側に作動し、操作レバー（３３）を第三操作ガイド（３２）の中立位置から他方に沿って操作すると、集草容器（９）が下降側、かつ、開閉蓋（１４）が閉じ側に作動することを特徴とする乗用型芝刈機とする。 The present invention has the following technical means to solve the technical problem. That is, in the invention of claim 1,
In a riding-type grass mower having a grass cutting portion (8) and a grass collecting container (9) at the rear of the traveling vehicle body (1) ,
The grass collection container (9) is configured to be moved up and down by an elevating arm (12) in the vertical direction and to be able to open and close the open / close lid (14) .
The elevating arm (12) is configured to be raised and lowered by the elevating cylinder (13) , and the opening / closing lid (14) is configured to be opened and closed by the opening / closing cylinder (15) .
An operation lever (33) for operating a valve for expanding and contracting the elevating cylinder (13) and a valve for expanding and contracting the opening and closing cylinder (15 ) is provided, and the operation lever (33) moves along the operation guide. the first operation guide for operating the lifting cylinders (13) (30), the second operation guide for operating the opening-closing cylinder (15) and (31), lifting cylinders (13) and for opening and closing A third operation guide (32) for operating the cylinder (15) together is provided ,
The first operation guide (30), the second operation guide (31), and the third operation guide (32) are provided in parallel, and the center position of each operation guide is a neutral position, and each neutral position is a movement guide. (34) and the operation lever (33) is configured to be movable between the operation guides.
A first valve operating body (36) that operates a valve for extending and retracting the elevating cylinder (13) and a first engagement plate (38) that is operated by engaging an operation lever (33);
A second valve operating body (37) for operating a valve for expanding and contracting the open / close cylinder (15) and a second engagement plate (39) operated by engaging the operating lever (33);
The first engagement plate (38) and the second engagement plate (39) are respectively provided with an engagement portion (38a, 39a) and an operation lever (33) that sandwich the operation lever (33) from the front and rear. Forming movement holes (38b, 39b) for movement along the movement guide (34);
The distal end portion of the engagement portion (38a) of the first engagement plate (38) and the distal end portion of the engagement portion (39a) of the second engagement plate (39) overlap in plan view,
When the operation lever (33) is operated along the first operation guide (30), the first engagement is caused by the engagement between the operation lever (33) and the engagement portion (38a) of the first engagement plate (38). The plate (38) is operated to extend and retract the lifting cylinder (13),
When the operation lever (33) is operated along the second operation guide (31), the second engagement is caused by the engagement between the operation lever (33) and the engagement portion (39a) of the second engagement plate (39). The plate (39) is operated, and the open / close cylinder (15) is expanded and contracted.
When the operation lever (33) is operated along the third operation guide (32), the operation lever (33) moves between the engagement portion (38a) of the first engagement plate (38) and the second engagement plate (39). Due to the engagement with both of the engaging portions (39a), both the first engaging plate (38) and the second engaging plate (39) operate together, and the elevating cylinder (13) and the opening / closing cylinder (15). )
When the operation lever (33) is operated along one side from the neutral position of the first operation guide (30), the grass collection container (9) is actuated upward, and along the other side from the neutral position of the first operation guide (30). Operation, the collecting container (9) is moved downward,
When the operation lever (33) is operated along one side from the neutral position of the second operation guide (31), the opening / closing lid (14) is operated to the open side, and the operation lever (33) is moved to the neutral position of the second operation guide (31). When operated along the other from the position, the open / close lid (14) is moved to the closed side,
When the operation lever (33) is operated along one side from the neutral position of the third operation guide (32), the grass collection container (9) is moved upward, and the open / close lid (14) is moved to the open side, and the operation lever When (33) is operated along the other from the neutral position of the third operation guide (32), the grass collection container (9) is actuated to the lowering side and the opening / closing lid (14) is actuated to the closing side. Riding lawn mower.

この構成によると、集草容器を昇降だけさせる操作と、開閉蓋を開閉だけさせる操作と、集草容器を昇降させながら開閉蓋を開閉させる操作を行なうことができ、作業状況に合わせた集草容器の草排出作業ができる。また、迅速な集草容器の草排出作業ができる。 According to this configuration, it is possible to perform an operation for only raising and lowering the grass collection container, an operation for only opening and closing the opening and closing lid, and an operation for opening and closing the opening and closing lid while raising and lowering the grass collection container. The grass can be discharged from the container. Moreover, the grass discharging operation of the grass collecting container can be performed quickly.

また、この構成によると、単一の操作レバーで操作できるため、誤操作を防止し、把持しやすくすることが出来る。 Further, according to this configuration, since it can be operated with a single operation lever, it is possible to prevent erroneous operation and facilitate gripping.

本発明は、集草容器の昇降・開閉操作を単一の操作レバーでし易くすることができる。また、迅速に昇降・開閉動作を行なうことができる。 The present invention can be easily lifting-off operation grass catcher in a single operation lever. Further, the lifting / closing operation can be performed quickly.

側面から見た乗用芝刈機の草刈作業位置と草排出位置を示す図The figure which shows the mowing work position and the grass discharge position of the riding lawn mower seen from the side 側面から見た草排出作業を示す図Diagram showing grass discharge from the side 操作レバーを説明する図Diagram explaining the operating lever 昇降用センサを説明する図The figure explaining the sensor for raising and lowering 別実施例の操作レバーを及び操作ガイドの形状を示す図The figure which shows the shape of the operation lever of another Example, and an operation guide 別実施例の操作ガイドの形状を示す図The figure which shows the shape of the operation guide of another Example 乗用型芝刈機の側面図Side view of riding lawn mower

本発明の乗用草刈機について、図面に基づいて説明する。
走行車体１には前輪２と後輪３を備え、走行車体１の前側にはエンジン４を内装するボンネット５を形成し、ボンネット５の後部にはステアリング６と運転座席７を設けている。 The riding mower of the present invention will be described with reference to the drawings.
The traveling vehicle body 1 includes a front wheel 2 and a rear wheel 3. A bonnet 5 that houses an engine 4 is formed on the front side of the traveling vehicle body 1, and a steering 6 and a driver seat 7 are provided at the rear of the bonnet 5.

前輪２と後輪３との間には草刈装置８を設け、走行車体１の後方には草刈装置８で刈取った草を収容する集草容器９を設け、運転座席７の下方には草刈装置８で刈り取った草が通過するシュータ１０を設けている。 A mowing device 8 is provided between the front wheel 2 and the rear wheel 3, a grass collecting container 9 for accommodating grass cut by the mowing device 8 is provided at the rear of the traveling vehicle body 1, and a mowing is provided below the driver seat 7. A shooter 10 through which the grass cut by the device 8 passes is provided.

集草容器９は走行車体１の後部に取り付けている支持フレーム１１に昇降アーム１２を介して支持される構成とし、昇降アーム１２は昇降用シリンダ１３の伸縮動作で昇降する構成としている。集草容器９の後部には開閉蓋１４を設け、開閉用シリンダ１５の伸縮動作で開閉する構成としている。 The grass collection container 9 is configured to be supported by a support frame 11 attached to the rear portion of the traveling vehicle body 1 via an elevating arm 12, and the elevating arm 12 is configured to move up and down by an expansion and contraction operation of the elevating cylinder 13. An opening / closing lid 14 is provided at the rear portion of the grass collection container 9 and is configured to be opened and closed by an expansion / contraction operation of the opening / closing cylinder 15.

昇降用シリンダ１３は走行車体１側と連結する油圧パイプ３５と連結し、油圧のバルブ（図示せず）を操作して伸縮する構成とし、開閉用シリンダ１５は走行車体１側とは独立した油圧シリンダで構成し、開閉用シリンダモータ（図示せず）で伸縮する構成である。
次に、集草容器９の昇降及び開閉を操作する操作具について説明する。 The elevating cylinder 13 is connected to a hydraulic pipe 35 connected to the traveling vehicle body 1 side, and is configured to expand and contract by operating a hydraulic valve (not shown), and the open / close cylinder 15 is hydraulically independent from the traveling vehicle body 1 side. A cylinder is configured to be expanded and contracted by an opening / closing cylinder motor (not shown).
Next, an operation tool for operating the raising and lowering and opening and closing of the grass collection container 9 will be described.

昇降用シリンダ１３を昇降操作する操作レバー２０を運転座席７に隣接するフェンダー２９に形成する操作ガイド２１に沿って移動可能に構成し、本実施の形態では長孔状の操作ガイド２１の中央を中立Ｎとし、操作ガイド２１の中央部より両端側をそれぞれ昇降用シリンダの上昇Ｊ、下降Ｋの動作範囲としている。 An operation lever 20 for raising and lowering the raising / lowering cylinder 13 is configured to be movable along an operation guide 21 formed on a fender 29 adjacent to the driver's seat 7. In the present embodiment, the center of the elongated hole-like operation guide 21 is formed. Neutral N is set, and both end sides from the center of the operation guide 21 are set as an operating range of ascending J and descending K of the lifting cylinder.

操作レバー２０の把持部２０ａには開閉用シリンダ１５を操作する開閉スイッチ２２が設けられている。本実施の形態の開閉スイッチ２２はシーソー式のスイッチであり、開閉用シリンダモータ（図示せず）と電気的に接続し、開閉用シリンダ１５を伸縮させる構成である。 An opening / closing switch 22 for operating the opening / closing cylinder 15 is provided on the grip 20 a of the operation lever 20. The open / close switch 22 according to the present embodiment is a seesaw type switch, and is electrically connected to an open / close cylinder motor (not shown) to extend and contract the open / close cylinder 15.

二本の昇降アーム１２の前端を連結体２３で連結し、連結体２３を支持フレーム１１に取り付けており、連結体２３に昇降用リミットスイッチ２４を設け、昇降アーム１２が設定以上上昇位置であることを検出する構成である。本実施の形態では昇降アーム１２が設定以上上昇位置まで上昇すると昇降用リミットスイッチ２４はオフし、上昇していた昇降アーム１２が設定位置まで下降すると昇降用リミットスイッチ２４がオンする構成である。勿論オン・オフは反対に設定しても良い。 The front ends of the two lifting arms 12 are connected by a connecting body 23, the connecting body 23 is attached to the support frame 11, a limit switch 24 for raising and lowering is provided on the connecting body 23, and the lifting arm 12 is at a higher position than set. It is the structure which detects this. In the present embodiment, the lifting limit switch 24 is turned off when the lifting arm 12 is raised to the raised position above the setting, and the lifting limit switch 24 is turned on when the raised lifting arm 12 is lowered to the setting position. Of course, on / off may be reversed.

開閉蓋１４の開閉を検出する開閉用リミットスイッチ２６を設けている。
次に本実施の形態の集草容器９の草排出動作及び草排出動作終了後に集草容器９を草刈姿勢に戻す動作について説明する。 An opening / closing limit switch 26 for detecting opening / closing of the opening / closing lid 14 is provided.
Next, the grass discharging operation of the grass collecting container 9 according to the present embodiment and the operation of returning the grass collecting container 9 to the mowing posture after the grass discharging operation is completed will be described.

走行しながら草刈作業を行ない、集草容器９に収容された草を排出するときには、オペレータが操作レバー２０を把持し、中立位置Ｎから昇降用シリンダ上昇Ｊ側に操作すると昇降用シリンダ１３が伸長し、集草容器９が排出姿勢に傾きながら上昇する。そして、上昇位置から開閉スイッチ２２を開側に操作すると開閉用シリンダ１５が伸長して開閉蓋１４が開放し、集草容器９内の刈り草が落下排出する。 When the mowing operation is performed while driving and the grass stored in the grass collection container 9 is discharged, the lifting / lowering cylinder 13 extends when the operator holds the operating lever 20 and operates from the neutral position N to the lifting / lowering cylinder ascending J side. Then, the grass collection container 9 rises while tilting to the discharge posture. When the open / close switch 22 is operated to the open side from the raised position, the open / close cylinder 15 is extended, the open / close lid 14 is opened, and the cut grass in the grass collection container 9 is dropped and discharged.

刈り草の排出後に集草容器９を草刈位置まで戻すときは、まず開閉スイッチ２２を閉側に操作し、開閉蓋１４を閉にしてから操作レバー２０を下降Ｋ側に操作すると昇降用シリンダ１３が縮み、集草容器９が草刈位置まで戻る。 When the grass collection container 9 is returned to the mowing position after the cut grass is discharged, the opening / closing switch 22 is first operated to the closed side, the opening / closing lid 14 is closed, and then the operating lever 20 is operated to the lowering K side. Shrinks and the grass collection container 9 returns to the mowing position.

次に、昇降・及び開閉動作についての諸条件について説明する。
開閉蓋１４は集草容器９が草刈位置にあるときに開き動作を行なうと地面等に当接して破損する場合がある。また、集草容器９内の草を円滑に排出するためにはある程度の高さまで上昇して集草容器９を傾けてから開閉蓋１４を開くことが望ましい。そこで、本実施の形態では集草容器９の上昇時に昇降アーム１２が設定高さ以上を検出したことを昇降用リミットスイッチ２４が検出するまでは、開閉スイッチ２２を開側に操作しても開閉用シリンダ１５に通電せず、開閉蓋１４の開動作を開始しないようにしている。あるいは、別実施例として操作レバー２０を上昇方向に操作したことを上昇スイッチ２５が検出したことを条件に開閉用スイッチ２２の開操作が開閉用シリンダ１５に通電して開閉蓋１４の開動作を行なえるように構成にしても良い。 Next, various conditions regarding the raising / lowering and opening / closing operations will be described.
If the opening / closing lid 14 is opened when the grass collection container 9 is in the grass cutting position, the opening / closing lid 14 may come into contact with the ground or the like and be damaged. Further, in order to smoothly discharge the grass in the grass collection container 9, it is desirable to open the open / close lid 14 after the grass collection container 9 is tilted by raising the grass to a certain height. Therefore, in this embodiment, even when the open / close switch 22 is operated to the open side, the open / close switch 22 is opened / closed until the lift limit switch 24 detects that the lift arm 12 has detected the set height or more when the grass collection container 9 is raised. The cylinder 15 is not energized, and the opening / closing lid 14 is not started to open. Alternatively, as another example, the opening operation of the opening / closing switch 22 energizes the opening / closing cylinder 15 and opens the opening / closing lid 14 on the condition that the raising switch 25 detects that the operating lever 20 has been operated in the upward direction. It may be configured so that it can be performed.

集草容器９が排出姿勢から草刈姿勢に戻すとき、操作レバー２０の下降操作を検出する下降スイッチ２６を検出すると、開閉用スイッチ２２に通電して開閉用シリンダ１５を縮ませ、開閉蓋１４を閉じる動作にする。 When the grass collecting container 9 returns from the discharging posture to the mowing posture, when the lowering switch 26 for detecting the lowering operation of the operation lever 20 is detected, the opening / closing switch 15 is contracted by energizing the opening / closing switch 22 and the opening / closing lid 14 is moved. Close action.

次に、操作具の別実施例について図５及び図６と図７に基づいて説明する。
昇降用シリンダ１３の伸縮動作用の第一操作ガイド３０と開閉用シリンダ１４の伸縮動作用の第二操作ガイド３１と昇降用シリンダ１３及び開閉用シリンダ１５が共に伸縮動作する第三操作ガイド３２を隣接位置に並列して形成し、各操作ガイドの中央部を中立位置Ｎとし、各操作ガイドの中立位置Ｎ間を単一の操作レバー３３がいずれかの操作ガイドに移動するための移動ガイド３４を形成している。操作ガイド及び移動ガイドは運転座席７に隣接するフェンダー２９に前後方向を長手に設けている。 Next, another embodiment of the operation tool will be described with reference to FIGS. 5, 6, and 7.
A first operation guide 30 for extending / contracting the lifting cylinder 13, a second operation guide 31 for extending / contracting the opening / closing cylinder 14, and a third operation guide 32 for expanding / contracting the lifting cylinder 13 and opening / closing cylinder 15 together. A movement guide 34 is formed in parallel with adjacent positions, the central portion of each operation guide being a neutral position N, and a single operation lever 33 moving to one of the operation guides between the neutral positions N of each operation guide. Is forming. The operation guide and the movement guide are provided in the fender 29 adjacent to the driver seat 7 in the longitudinal direction.

図７の乗用芝刈機は昇降用シリンダ１３及び開閉用シリンダ１５のいずれも走行車体側と油圧ホース３５で連結する構成で、昇降用シリンダ１３用のバルブ（図示せず）と開閉用シリンダ１５用のバルブ（図示せず）をそれぞれ操作することで、昇降用シリンダ１３と開閉用シリンダ１５の伸縮を操作している。該バルブの操作構成は該バルブを操作するバルブ操作体３６，３７と操作レバー３４が係合して動作する係合プレート３８，３９とを連結し、操作レバー３３の操作により、係合プレート３８，３９及びバルブ操作体３６，３７を動作し、昇降用シリンダ１３と開閉用シリンダ１４の伸縮を行なう。 The riding lawn mower of FIG. 7 has a configuration in which both the lifting cylinder 13 and the opening / closing cylinder 15 are connected to the traveling vehicle body side by a hydraulic hose 35, and a valve (not shown) for the lifting cylinder 13 and the opening / closing cylinder 15 are used. Each of these valves (not shown) is operated to extend and retract the lifting cylinder 13 and the opening / closing cylinder 15. The operation structure of the valve is such that the valve operating bodies 36 and 37 for operating the valve are connected to the engagement plates 38 and 39 that are operated by the operation lever 34 being engaged. , 39 and valve operating bodies 36, 37 are operated to expand and contract the elevating cylinder 13 and the opening / closing cylinder 14.

係合プレート３８，３９は操作レバー３３を挟むように形成する係合部３８ａ，３９ａと操作レバー３３が移動ガイド３４に沿って移動するための移動孔３８ｂ，３９ｂを形成している。 The engagement plates 38 and 39 form engagement holes 38 a and 39 a formed so as to sandwich the operation lever 33 and movement holes 38 b and 39 b for the operation lever 33 to move along the movement guide 34.

昇降用シリンダ１３用の第一バルブ操作体３６と開閉用シリンダ１５用の第二バルブ操作体３７はそれぞれ昇降用シリンダ１３用の第一係合プレート３８と開閉用シリンダ１５用の第二係合プレート３９により別個に動作する構成とし、第一操作ガイド３０に沿って操作レバー３３を操作すると第一係合プレート３８が動作し、第二操作ガイド３１に沿って操作レバー３３を操作すると第二係合プレート３９が動作する。 The first valve operating body 36 for the lifting cylinder 13 and the second valve operating body 37 for the opening / closing cylinder 15 are respectively the first engagement plate 38 for the lifting cylinder 13 and the second engagement for the opening / closing cylinder 15. When the operation lever 33 is operated along the first operation guide 30, the first engagement plate 38 is operated, and when the operation lever 33 is operated along the second operation guide 31, the second operation guide 33 is operated. The engagement plate 39 operates.

第一係合プレート３８と第二係合プレート３９の係合部３８ａ，３９ａの一部Ｃは平面視で重複する構成で。第三操作ガイド３２（係合孔３８ｂ，３９ｂ）に沿って操作レバー３３を操作すると、第一係合プレート３８と第二係合プレート３９の両方が操作レバー３３と係合して動作することで第一バルブ操作体３６と第二バルブ操作体３７も共に動作する。すなわち、第三操作ガイド３２は昇降用シリンダ１３と開閉用シリンダ１５が共に伸縮するためのガイドであり、オペレータが迅速に草排出作業を行なう場合に使用するものである。 Part C of the engaging portions 38a and 39a of the first engaging plate 38 and the second engaging plate 39 overlaps in plan view. When the operation lever 33 is operated along the third operation guide 32 (engagement holes 38b, 39b), both the first engagement plate 38 and the second engagement plate 39 are engaged with the operation lever 33 and operated. Thus, both the first valve operating body 36 and the second valve operating body 37 operate. In other words, the third operation guide 32 is a guide for expanding and contracting both the lifting cylinder 13 and the opening / closing cylinder 15 and is used when the operator quickly performs the grass discharging operation.

他の草排出作業の操作として、集草容器９を所望の高さで草を排出したい場合を説明すると、まず操作レバー３３を第一操作ガイド３０に沿わせて上昇側ｊの途中位置まで移動する。すると、昇降用シリンダ１３は第一係合プレート３８が移動した分だけ伸長し、集草容器９はその上昇位置の姿勢を維持する。そして、操作レバー３３を中立位置Ｎに戻して第二操作ガイド３１に移動し、第二係合プレート３９を開き側ｈに移動するよう操作する。すると第二係合プレート３９が移動した分だけ開閉用シリンダ１５が伸長し、開閉蓋１４はその開放位置の姿勢を維持する。昇降用シリンダ１３を下降側ｋ及び開閉蓋１４の閉じ側ｔについても同様に別個に操作可能である。 As another operation for discharging the grass, a case where the grass collecting container 9 is desired to discharge grass at a desired height will be described. First, the operation lever 33 is moved along the first operation guide 30 to the middle position on the ascending side j. To do. Then, the raising / lowering cylinder 13 is extended by the amount of movement of the first engagement plate 38, and the grass collection container 9 maintains its raised position. Then, the operation lever 33 is returned to the neutral position N and moved to the second operation guide 31, and the second engagement plate 39 is operated to move to the opening side h. Then, the opening / closing cylinder 15 is extended by the amount of movement of the second engagement plate 39, and the opening / closing lid 14 maintains its open position. Similarly, the raising / lowering cylinder 13 can be separately operated for the lowering side k and the closing side t of the opening / closing lid 14.

図６は図５と同じ技術思想に基づく別の形状の操作ガイドである。相違点は図５でいう第三操作ガイド３２を第一操作ガイド３０の上昇側ｊの延長線上に設けている点にある。図６の符号は図５の符号に準じて付している。 FIG. 6 shows an operation guide having another shape based on the same technical idea as FIG. The difference is that the third operation guide 32 shown in FIG. 5 is provided on an extension line on the rising side j of the first operation guide 30. The reference numerals in FIG. 6 are attached according to the reference numerals in FIG.

図７について、４０は集草容器９を走行車体１から取り外した時に、集草容器９を載置して保管するための載置台であり、草刈作業・草排出作業中は図１のように不要である。開閉用シリンダ１５は表面をカバー１５ａで覆われていることを示している。開閉用シリンダ１５用の油圧ホース３５は昇降アーム１２に沿って設けており、油圧ホースの外周をカバー３５ａで覆っていることを示している。 7, reference numeral 40 denotes a mounting table for mounting and storing the grass collection container 9 when the grass collection container 9 is removed from the traveling vehicle body 1. As shown in FIG. 1 during grass cutting and grass discharging operations. It is unnecessary. The opening / closing cylinder 15 is covered with a cover 15a. The hydraulic hose 35 for the opening / closing cylinder 15 is provided along the elevating arm 12, indicating that the outer periphery of the hydraulic hose is covered with a cover 35a.

図７と図１の乗用型草刈機の相違点として、図１の開閉用シリンダ１５は走行車体１側とは独立した油圧シリンダで構成し、開閉用シリンダモータ（図示せず）で伸縮する構成に対し、図７の開閉用シリンダ１５用の油圧ホース３５は走行車体１から昇降アーム１２に沿って設けている点で相違する。図１の構成によると、油圧ホース３５を昇降アーム１２に沿って配管するする必要がないため、外観が良好になり、また、コストダウンになるというメリットがある。 The difference between the riding type mowers of FIG. 7 and FIG. 1 is that the opening / closing cylinder 15 of FIG. 1 is composed of a hydraulic cylinder independent of the traveling vehicle body 1 side, and is expanded and contracted by an opening / closing cylinder motor (not shown). On the other hand, the hydraulic hose 35 for the opening / closing cylinder 15 in FIG. 7 is different from the traveling vehicle body 1 along the lifting arm 12. According to the configuration of FIG. 1, there is no need to pipe the hydraulic hose 35 along the elevating arm 12, so that there is an advantage that the appearance is improved and the cost is reduced.

１走行車体
８草刈装置（草刈部）
９集草容器
１２昇降アーム
１３昇降用シリンダ
１４開閉蓋
１５開閉用シリンダ
２０操作レバー
２０ａ把持部
２２開閉スイッチ（操作スイッチ）
２４昇降用リミットスイッチ（上昇検出手段） 1 Traveling body 8 Mowing device (mowing unit)
9 Grass collecting container 12 Lifting arm 13 Lifting cylinder 14 Opening / closing lid 15 Opening / closing cylinder 20 Operation lever 20a Holding part 22 Opening / closing switch (operation switch)
24 Limit switch for lifting (rising detection means)

Claims

In a riding-type grass mower having a grass cutting portion (8) and a grass collecting container (9) at the rear of the traveling vehicle body (1) ,
The grass collection container (9) is configured to be moved up and down by an elevating arm (12) in the vertical direction and to be able to open and close the open / close lid (14) .
The elevating arm (12) is configured to be raised and lowered by the elevating cylinder (13) , and the opening / closing lid (14) is configured to be opened and closed by the opening / closing cylinder (15) .
An operation lever (33) for operating a valve for expanding and contracting the elevating cylinder (13) and a valve for expanding and contracting the opening and closing cylinder (15 ) is provided, and the operation lever (33) moves along the operation guide. the first operation guide for operating the lifting cylinders (13) (30), the second operation guide for operating the opening-closing cylinder (15) and (31), lifting cylinders (13) and for opening and closing A third operation guide (32) for operating the cylinder (15) together is provided ,
The first operation guide (30), the second operation guide (31), and the third operation guide (32) are provided in parallel, and the center position of each operation guide is a neutral position, and each neutral position is a movement guide. (34) and the operation lever (33) is configured to be movable between the operation guides.
A first valve operating body (36) that operates a valve for extending and retracting the elevating cylinder (13) and a first engagement plate (38) that is operated by engaging an operation lever (33);
A second valve operating body (37) for operating a valve for expanding and contracting the open / close cylinder (15) and a second engagement plate (39) operated by engaging the operating lever (33);
The first engagement plate (38) and the second engagement plate (39) are respectively provided with an engagement portion (38a, 39a) and an operation lever (33) that sandwich the operation lever (33) from the front and rear. Forming movement holes (38b, 39b) for movement along the movement guide (34);
The distal end portion of the engagement portion (38a) of the first engagement plate (38) and the distal end portion of the engagement portion (39a) of the second engagement plate (39) overlap in plan view,
When the operation lever (33) is operated along the first operation guide (30), the first engagement is caused by the engagement between the operation lever (33) and the engagement portion (38a) of the first engagement plate (38). The plate (38) is operated to extend and retract the lifting cylinder (13),
When the operation lever (33) is operated along the second operation guide (31), the second engagement is caused by the engagement between the operation lever (33) and the engagement portion (39a) of the second engagement plate (39). The plate (39) is operated, and the open / close cylinder (15) is expanded and contracted.
When the operation lever (33) is operated along the third operation guide (32), the operation lever (33) moves between the engagement portion (38a) of the first engagement plate (38) and the second engagement plate (39). Due to the engagement with both of the engaging portions (39a), both the first engaging plate (38) and the second engaging plate (39) operate together, and the elevating cylinder (13) and the opening / closing cylinder (15). )
When the operation lever (33) is operated along one side from the neutral position of the first operation guide (30), the grass collection container (9) is actuated upward, and along the other side from the neutral position of the first operation guide (30). Operation, the collecting container (9) is moved downward,
When the operation lever (33) is operated along one side from the neutral position of the second operation guide (31), the opening / closing lid (14) is operated to the open side, and the operation lever (33) is moved to the neutral position of the second operation guide (31). When operated along the other from the position, the open / close lid (14) is moved to the closed side,
When the operation lever (33) is operated along one side from the neutral position of the third operation guide (32), the grass collection container (9) is moved upward, and the open / close lid (14) is moved to the open side, and the operation lever When (33) is operated along the other from the neutral position of the third operation guide (32), the grass collection container (9) is actuated to the lowering side and the opening / closing lid (14) is actuated to the closing side. Riding lawn mower.