JP2018088868A - Mower - Google Patents

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JP2018088868A
JP2018088868A JP2016235231A JP2016235231A JP2018088868A JP 2018088868 A JP2018088868 A JP 2018088868A JP 2016235231 A JP2016235231 A JP 2016235231A JP 2016235231 A JP2016235231 A JP 2016235231A JP 2018088868 A JP2018088868 A JP 2018088868A
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guide member
mower
discharge port
posture
locking
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JP6707017B2 (en
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遼太郎 千田
Ryotaro Senda
遼太郎 千田
健介 上本
Kensuke Uemoto
健介 上本
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Kubota Corp
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Kubota Corp
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Priority to EP17204490.1A priority patent/EP3329759B1/en
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Abstract

PROBLEM TO BE SOLVED: To surely maintain a lodging state of a guiding member provided at a discharge port for discharging mowed grass without solely depending on an urging force of an urging mechanism, and also enable an operation in a standing state of the guiding member with small operational force.SOLUTION: A plurality of rotational blades are provided inside a mower deck 20. A guiding member 30 is provided which guides discharged grasses to a lateral outward direction, the guiding member 30 being provided to a lateral outward side of a discharge port 25 formed on one lateral side of the mower deck 20. The guiding member is configured to be changeable between a standing state in which the guiding member stands to open the discharge port 25 and a lodging state in which the guiding member is lodged to guide the grasses discharged from the discharge port 25. An urging mechanism 29 which elastically urges the guiding member 30 to the lodging state side and a locking mechanism which fixes a position of the guiding member 30 in the lodging state are provided.SELECTED DRAWING: Figure 4

Description

本発明は、モーアデッキの内部に複数の回転ブレードが配設され、そのモーアデッキの横一側部に形成された刈草排出用の排出口の横外側に、放出刈草を横外方に案内する案内部材が備えられたモーアに関する。   The present invention provides a guide member in which a plurality of rotating blades are arranged inside a mower deck, and guides the released mowing grass laterally outwardly on the laterally outer side of the discharge port for discharging mowing grass formed on one side of the mower deck. Concerning moore.

従来の技術としては、モーアデッキの横一側部に形成された刈草排出用の排出口の横外側に、放出刈草を横外方に案内する案内部材が備えられ、その案内部材を水平方向の横軸心回りで起伏揺動可能に支持させたものが知られている(例えば特許文献1参照)。
この構造によれば、案内部材が水平方向に沿う倒伏姿勢にして刈草の横側方への放出を案内する状態と、案内部材を起立させ、排出口を閉じてマルチング作業を行い易くした状態とに、案内部材の姿勢切換を行うことが可能である。
As a conventional technique, a guide member is provided on the laterally outer side of a discharge port for discharging mowing grass formed on one side portion of the mower deck, and the guide member is provided in the horizontal direction. One that is supported so as to be able to swing up and down around an axis is known (see, for example, Patent Document 1).
According to this structure, the guide member is in a lying posture along the horizontal direction to guide the release of the cut grass laterally, and the guide member is erected and the discharge port is closed to facilitate the mulching operation In addition, the attitude of the guide member can be switched.

特開2008−278818号公報(段落「0027」,「0048」、及び図面の「図8」,「図9」参照)JP 2008-278818 A (see paragraphs “0027” and “0048” and “FIG. 8” and “FIG. 9” in the drawings)

特許文献1に示された構造のものでは、刈草排出用の排出口に設けた案内部材を、ねじりバネを用いた付勢機構によって、案内部材の倒伏姿勢側へ揺動付勢している。これは、機体走行に伴う倒伏姿勢の案内部材のガタツキを付勢機構の付勢力によって抑制したり、起立姿勢とした案内部材をストッパーとなる部材に押し付けた状態を維持するためである。
これにより、刈草を横外方へ排出するサイドディスチャージ方式の使用形態では案内部材の倒伏姿勢を維持し、刈草の放出を行わないマルチング方式での使用形態では案内部材が横外方へ延出されない状態を維持するように、案内部材の姿勢変更を行うことができる点では有用である。
しかしながら、機体の作業走行に伴う振動によって倒伏姿勢の案内部材のガタツキを確実に抑制するには、かなり強い付勢力が必要であるが、そのように付勢力を強くすると、案内部材の姿勢変更を行う操作が重くて操作し難くなるという点で改善の余地がある。
In the structure shown in Patent Document 1, the guide member provided at the discharge port for discharging the mowing grass is oscillated and urged toward the lying down posture side of the guide member by an urging mechanism using a torsion spring. This is in order to suppress the rattling of the guide member in the lying posture accompanying the traveling of the aircraft by the urging force of the urging mechanism, or to maintain the state where the guide member in the standing posture is pressed against the member serving as the stopper.
As a result, in the usage mode of the side discharge method that discharges the cut grass laterally outward, the guide member maintains the lying posture, and in the usage mode of the mulching method that does not release the cut grass, the guide member does not extend laterally outward. This is useful in that the attitude of the guide member can be changed so as to maintain the state.
However, in order to reliably suppress rattling of the guide member in the lying posture due to vibration accompanying the work of the aircraft, a fairly strong urging force is required, but if the urging force is increased in this way, the posture of the guide member can be changed. There is room for improvement in that the operations to be performed are heavy and difficult to operate.

本発明は、刈草排出用の排出口に設けた案内部材の倒伏姿勢を、付勢機構の付勢力のみに頼らず確実に姿勢維持することができ、かつ軽い操作力で起立姿勢にも操作可能であるモーアを提供しようとするものである。   The present invention can reliably maintain the lying posture of the guide member provided at the discharge port for cutting grass cutting without depending on only the urging force of the urging mechanism, and can be operated in a standing posture with a light operating force. It is intended to provide Mohr that is.

本発明におけるモーアの特徴は、モーアデッキの内部に縦軸心周りで回転駆動される複数の回転ブレードが配設され、前記回転ブレードで刈り取った刈草を排出する排出口が前記モーアデッキの横一側部に形成され、前記排出口の横外側に、その排出口から放出された刈草を横外方に案内する案内部材が備えられ、前記案内部材が、起立して前記排出口を開放する起立姿勢と、倒伏して前記排出口からの放出刈草を案内する倒伏姿勢とに姿勢変更可能に構成されたモーアにおいて、前記案内部材を前記倒伏姿勢側へ弾性付勢する付勢機構と、前記案内部材を前記倒伏姿勢で位置固定するロック機構と、が備えられているということである。   The feature of the mower in the present invention is that a plurality of rotating blades that are driven to rotate about the longitudinal axis are disposed inside the mower deck, and a discharge port that discharges the mowing grass cut by the rotating blade is a lateral side portion of the mower deck. A guide member that guides the cut grass that has been discharged from the discharge port laterally outward is provided on the lateral outer side of the discharge port, and the guide member stands up and opens the discharge port. In a mower configured to be able to change the posture to a lying posture that falls and guides the released grass from the discharge port, a biasing mechanism that elastically biases the guide member toward the lying posture, and the guide member A locking mechanism for fixing the position in the lying posture.

本発明によれば、案内部材を倒伏姿勢側へ弾性付勢する付勢機構が備えられているので、案内部材を常時倒伏姿勢側へ付勢して、排出口が開放されたままになることを避けることができる。そして、倒伏姿勢はロック機構によって確実に維持されるので、案内部材に下方側からの突き上げ外力が作用したとしても、案内部材が起立姿勢に姿勢変更されてしまうことを回避し得る。
また、案内部材の倒伏姿勢はロック機構によって確実に維持されるので、付勢機構による付勢力を、案内部材の起立姿勢側への姿勢変更を阻止し得るほどには大きくする必要はなく、比較的軽い付勢力に設定することが可能である。したがって、案内部材の倒伏姿勢側への常時付勢と、案内部材のガタツキ抑制と、起立姿勢への姿勢変更とを、比較的軽い付勢力の付勢機構を採用しながら的確に行うことができる利点がある。
According to the present invention, since the biasing mechanism that elastically biases the guide member toward the lying posture is provided, the guide member is always biased toward the lying posture, and the discharge port remains open. Can be avoided. Since the lying posture is reliably maintained by the lock mechanism, it is possible to prevent the posture of the guide member from being changed to the standing posture even if a push-up external force from below is applied to the guide member.
In addition, since the lying posture of the guide member is reliably maintained by the lock mechanism, it is not necessary to increase the urging force by the urging mechanism so as to prevent the posture change of the guide member to the standing posture side. It is possible to set a moderate biasing force. Therefore, it is possible to accurately perform the constant urging of the guide member to the lying posture side, the suppression of rattling of the guide member, and the posture change to the standing posture while adopting a biasing mechanism of a relatively light urging force. There are advantages.

本発明においては、前記ロック機構に、前記モーアデッキとそのモーアデッキに対して揺動作動可能に支持された前記案内部材とのうちの、いずれか一方に装備された係止部材と、いずれか他方に装備された被係止部材と、前記係止部材を前記被係止部材との係合側へ弾性付勢する係止付勢バネと、が備えられていると好適である。   In the present invention, the locking mechanism includes a locking member mounted on one of the mower deck and the guide member supported to be swingable with respect to the mower deck, and on the other It is preferable that an equipped locked member and a locking biasing spring that elastically biases the locking member toward the engagement side with the locked member are provided.

本発明によれば、ロック機構に、係止部材を被係止部材との係合側へ弾性付勢する係止付勢バネが備えられているので、案内部材を所定の倒伏位置へ操作するだけで、係止部材を被係止部材に係合させて自動的にロック状態とすることができる。   According to the present invention, since the locking mechanism is provided with the locking biasing spring that elastically biases the locking member toward the engagement side with the locked member, the guide member is operated to the predetermined lying position. By simply engaging the locking member with the locked member, it can be automatically locked.

本発明においては、前記案内部材を前記起立姿勢から前記倒伏姿勢側へ付勢する前記付勢機構の復帰付勢力が、前記係止付勢バネで前記係合側へ付勢された前記係止部材と前記被係止部材との当接による摩擦抵抗よりも強く設定されていると好適である。   In the present invention, the return biasing force of the biasing mechanism that biases the guide member from the standing posture to the lying posture side is biased to the engagement side by the latching biasing spring. It is preferable that the frictional resistance by contact between the member and the locked member is set to be stronger.

本発明によれば、付勢機構の復帰付勢力が、係止付勢バネで係合側へ付勢された係止部材と被係止部材との当接による摩擦抵抗よりも強く設定されている。
すなわち、係止付勢バネの係合側への付勢力は、付勢機構の倒伏姿勢側への復帰付勢力による案内部材の倒伏方向への移動に対しては、係止部材と被係止部材との当接による摩擦抵抗として作用する。したがって、案内部材を人為的に起立姿勢に操作している状態では、その人為操作力を補助する役割を果たし、案内部材の起立姿勢の維持を比較的軽い操作で行い易い。
そして、手を離して、案内部材を起立姿勢に維持する操作を解除すれば、弱い係止付勢バネの係合側への付勢力による摩擦抵抗だけでは、付勢機構による倒伏姿勢側への復帰付勢力に抗しきれないので、案内部材は自動的に倒伏姿勢側へ復帰操作される。
According to the present invention, the return biasing force of the biasing mechanism is set to be stronger than the frictional resistance caused by the contact between the locking member biased to the engagement side by the locking biasing spring and the locked member. Yes.
In other words, the urging force of the locking urging spring to the engagement side is such that the movement of the guide member in the lying down direction due to the return urging force of the urging mechanism to the lying down posture side is locked with the locking member. It acts as a frictional resistance due to contact with the member. Therefore, in a state where the guide member is artificially operated to the standing posture, it plays a role of assisting the artificial operation force, and it is easy to maintain the standing posture of the guide member with a relatively light operation.
Then, by releasing the hand and releasing the operation to maintain the guide member in the standing posture, the frictional force due to the biasing force to the engagement side of the weak latching biasing spring alone will cause the biasing mechanism to move to the lying down posture side. Since the return biasing force cannot be resisted, the guide member is automatically returned to the lying posture side.

乗用型芝刈り機の左側面図である。It is a left view of a riding type lawn mower. 乗用型芝刈り機の平面図である。It is a top view of a riding type lawn mower. モーアの排出口近くを示す平面図である。It is a top view which shows the discharge opening vicinity of a mower. モーアの排出口近くを示す分解斜視図である。It is a disassembled perspective view which shows the moor discharge port vicinity. 案内部材を倒伏姿勢にした排出口近くを示す側面図である。It is a side view which shows the vicinity of the discharge port which made the guide member the lying posture. 案内部材を起立姿勢にした排出口近くを示す側面図である。It is a side view which shows the vicinity of the discharge port which made the guide member the standing posture.

以下、本発明における実施形態の一例を図面の記載に基づいて説明する。
尚、本実施形態での説明における前後方向及び左右方向は、特段の説明がない限り、次のように記載している。つまり、本発明における乗用型芝刈り機の作業走行時における前進側の進行方向(図1,2における矢印F参照)が「前」、後進側への進行方向(図1,2における矢印B参照)が「後」、その前後方向での前向き姿勢を基準としての走行機体の右側に相当する方向(図2における矢印R参照)が「右」、同様に走行機体の左側に相当する方向(図2における矢印L参照)が「左」である。
Hereinafter, an exemplary embodiment of the present invention will be described based on the drawings.
In the description of the present embodiment, the front-rear direction and the left-right direction are described as follows unless otherwise specified. In other words, the forward traveling direction (see arrow F in FIGS. 1 and 2) during work travel of the riding lawn mower in the present invention is “forward”, and the backward traveling direction (see arrow B in FIGS. 1 and 2). ) Is “rear”, the direction corresponding to the right side of the traveling aircraft with reference to the forward-facing posture in the front-rear direction (see arrow R in FIG. 2) is “right”, and similarly the direction corresponding to the left side of the traveling aircraft (see FIG. 2 (see arrow L in FIG. 2) is “left”.

〔乗用型芝刈り機の全体構成〕
図1,図2に基づいて、乗用型芝刈り機の全体構成について説明する。
図1に示すように、乗用型芝刈り機は、操向操作される前輪1Fと操向不能で駆動される後輪1Rとが走行機体1に備えられている。走行機体1の下腹部に、モーア2がリンク機構10を介して平行昇降可能に吊り下げ支持されている。
走行機体1の後部にはエンジン11が搭載されている。このエンジン11の前方に突出された出力軸(図示せず)から取り出された動力が、後輪1Rを装備した伝動ケース(図示せず)に伝達され、その伝動ケース、及び伝動ケースから導出された伝動軸12を経てモーア2にエンジン動力が伝達されている。
[Overall configuration of riding lawn mower]
Based on FIG. 1, FIG. 2, the whole structure of a riding-type lawn mower is demonstrated.
As shown in FIG. 1, the riding lawn mower includes a traveling machine body 1 that includes a front wheel 1 </ b> F that is steered and a rear wheel 1 </ b> R that is driven so as not to be steered. A mower 2 is suspended and supported by the lower abdomen of the traveling machine body 1 via a link mechanism 10 so as to be movable up and down in parallel.
An engine 11 is mounted on the rear part of the traveling machine body 1. The power extracted from an output shaft (not shown) protruding forward of the engine 11 is transmitted to a transmission case (not shown) equipped with the rear wheel 1R, and is derived from the transmission case and the transmission case. Engine power is transmitted to the mower 2 via the transmission shaft 12.

走行機体1の後部に前記エンジン11を内装した原動部13が配設され、原動部13よりも前方側の機体中央部に運転座席14が設けられている。運転座席14の前方位置に、操縦操作用の左右一対の操縦操作杆15が設けられ、運転座席14と原動部13との中間位置にロプス16が設けられている。
モーア2は、前後方向で運転座席14と重複する位置に相当する箇所で、走行機体1の下方側に配備されている。
A driving part 13 having the engine 11 mounted therein is disposed at the rear of the traveling machine body 1, and a driver seat 14 is provided in the center of the machine body on the front side of the driving part 13. A pair of left and right control operation rods 15 for operation are provided in front of the driver seat 14, and a lops 16 is provided at an intermediate position between the driver seat 14 and the driving unit 13.
The mower 2 is disposed on the lower side of the traveling machine body 1 at a position corresponding to the position overlapping the driver seat 14 in the front-rear direction.

〔モーアの全体構成〕
図1及び図2に示すように、モーア2は、モーアデッキ20を上下方向で貫通する3本の回転軸(図示せず)に支持されて上下方向の回転軸心P1,P2,P2(縦軸心に相当する)回りで回転駆動される3枚の回転ブレード21,22を備えている。
この3枚の回転ブレード21,22は左右方向に並設されている。
[Moore overall configuration]
As shown in FIGS. 1 and 2, the mower 2 is supported by three rotating shafts (not shown) penetrating the mower deck 20 in the vertical direction, and the vertical rotation axes P1, P2, P2 (vertical axis) It includes three rotating blades 21 and 22 that are driven to rotate around (corresponding to the center).
The three rotating blades 21 and 22 are arranged side by side in the left-right direction.

回転軸の下端部に装着された各回転ブレード21,22は、帯板状の鋼板で構成されている。各回転ブレード21,22における両端部の一側に切刃(図示せず)が形成され、両端部の他側に起風羽根(図示せず)が一体に形成されている。
モーアデッキ20の左右両端近くで、かつ前後両側にゲージ輪23が取り付けられている。このゲージ輪23によって各回転ブレード21,22の対地高さを調節可能に構成してある。
Each rotary blade 21, 22 attached to the lower end of the rotary shaft is composed of a strip-shaped steel plate. Cutting blades (not shown) are formed on one side of both ends of each rotary blade 21, 22, and wind-up blades (not shown) are integrally formed on the other side of both ends.
Gauge wheels 23 are attached near the left and right ends of the moor deck 20 and on both the front and rear sides. The height of the ground of each rotary blade 21, 22 can be adjusted by the gauge ring 23.

モーアデッキ20の上面における左右中央部に分岐ボックス24が設けられている。この分岐ボックス24に伝動軸12を介してエンジン11の動力が伝達されている。
分岐ボックス24の内部には、前後向きの伝動軸12側から伝達される回転動力を、図示しない上下方向の作業出力軸の回転に変換する機構が備えられ、その作業出力軸に作業用出力プーリ(図示せず)が備えられている。そして、作業用出力プーリの回転が、伝動ベルト(図示せず)を介して、各回転ブレード21,22の回転軸の上端部に備えた伝動プーリ(図示せず)に伝達される。
A branch box 24 is provided at the center of the left and right of the upper surface of the moor deck 20. The power of the engine 11 is transmitted to the branch box 24 via the transmission shaft 12.
The branch box 24 is provided with a mechanism for converting rotational power transmitted from the front-rear transmission shaft 12 side to rotation of a work output shaft (not shown) in the vertical direction, and a work output pulley is provided on the work output shaft. (Not shown). Then, the rotation of the work output pulley is transmitted to a transmission pulley (not shown) provided at the upper end of the rotary shaft of each rotary blade 21, 22 via a transmission belt (not shown).

モーア2は、平面視において機体中央側の回転ブレード21の回転軸心P1が、左右方向での横外方に位置する回転ブレード22の回転軸心P2よりも前方に位置するように配備されている。
このように、各回転ブレード21,22は、その回転軸心P1,P2の位置が左右方向の一直線上に並ぶ状態で設けられているのではなく、前後方向で少し位置ずれした状態に設けられている。このように各回転ブレード21,22の回転軸心P1,P2の位置を前後方向で少し位置ずれさせることにより、各回転ブレード21,22の先端回動軌跡同士の干渉は避けながら、その先端回動軌跡の通過跡を左右方向で少し重複する状態に配設することができる。
The mower 2 is arranged such that the rotational axis P1 of the rotary blade 21 on the center side of the machine body is positioned in front of the rotational axis P2 of the rotary blade 22 located laterally outward in the left-right direction in plan view. Yes.
Thus, the rotary blades 21 and 22 are not provided in a state where the rotational axes P1 and P2 are aligned on a straight line in the left-right direction, but are provided in a state where they are slightly displaced in the front-rear direction. ing. In this way, by slightly shifting the positions of the rotational axes P1 and P2 of the rotary blades 21 and 22 in the front-rear direction, the front end rotation trajectory of the rotary blades 21 and 22 is avoided while avoiding interference. It is possible to arrange the passage traces of the movement traces so as to slightly overlap in the left-right direction.

つまり、各回転ブレード21,22の回転軸心P1,P2の位置を前後方向で位置ずれさせると、左右方向における各回転ブレード21,22の回転軸心P1,P2同士の間隔を、左右方向の一直線上に並べる場合よりも少し短くしても、各回転ブレード21,22の先端回動軌跡同士が重複しない状態で配設することができる。これにより、各回転ブレード21,22の先端回動軌跡同士の重複は避けながら、先端回動軌跡の通過跡同士は少し重複した状態とすることができる。
このように各回転ブレード21,22の先端回動軌跡の通過跡を少し重複させることで、隣接する回転ブレード21,22同士の間で刈り残しが発生しないように構成されている。
That is, if the positions of the rotational axes P1 and P2 of the rotary blades 21 and 22 are displaced in the front-rear direction, the spacing between the rotational axes P1 and P2 of the rotary blades 21 and 22 in the left-right direction is changed in the left-right direction. Even if it is slightly shorter than the case where they are arranged on a straight line, the tip rotation trajectories of the rotary blades 21 and 22 can be arranged so as not to overlap each other. Thereby, the passing traces of the tip rotation traces can be slightly overlapped while avoiding the overlap of the tip rotation traces of the rotary blades 21 and 22.
As described above, the passing traces of the tip rotation trajectories of the rotary blades 21 and 22 are slightly overlapped, so that no uncut portion is generated between the adjacent rotary blades 21 and 22.

図2に示すように、モーアデッキ20の右端部には、各回転ブレード21,22で刈り取られた刈草を排出するための排出口25が設けられている。この排出口25の横外側には、案内部材30が前後向きの軸心P3周りで上下に揺動可能に取り付けられている。
そして、刈り取った刈草をモーアデッキ20内から車外右後方に排出させるサイドディスチャージ形態で、案内部材30を下方へ倒して排出口25の横外側へ向けて延出し、回転ブレード21,22を回転させながら走行すると、モーアデッキ20内で刈り取った刈草をモーアデッキ20の右斜め後方に排出することができるように構成されている。
As shown in FIG. 2, the right end portion of the moor deck 20 is provided with a discharge port 25 for discharging the cut grass cut by the rotary blades 21 and 22. On the lateral outer side of the discharge port 25, a guide member 30 is attached so as to be swingable up and down around a longitudinal axis P3.
Then, in a side discharge mode in which the cut grass is discharged from the mower deck 20 to the right rear outside the vehicle, the guide member 30 is tilted downward and extended toward the lateral outer side of the discharge port 25 while rotating the rotating blades 21 and 22. When traveling, the mowing grass cut in the mower deck 20 can be discharged diagonally to the right rear of the mower deck 20.

〔案内部材の構造〕
案内部材30の詳細構造について説明する。
図3乃至図6に示すように、案内部材30は、前後向きの軸心P3周りで上方に揺動した起立姿勢と、前後向きの軸心P3周りで下方に揺動して走行面に沿って倒伏した倒伏姿勢とに姿勢変更可能に構成されている。
上記の案内部材30を起立させた姿勢では、排出口25周りでのメンテナンス作業等を行い易い。案内部材30を倒伏させた姿勢では、サイドディスチャージ形態における刈草の必要以上の広範囲への拡散を避けながら所定方向へ排出案内することができる。
[Guide member structure]
The detailed structure of the guide member 30 will be described.
As shown in FIG. 3 to FIG. 6, the guide member 30 swings upward around the longitudinal axis P3 and swings downward around the longitudinal axis P3 to follow the traveling surface. The posture can be changed to the lying posture.
In the posture in which the guide member 30 is raised, maintenance work and the like around the discharge port 25 are easily performed. In the posture in which the guide member 30 is laid down, it is possible to guide the discharge in a predetermined direction while avoiding the spread of the mowing grass more than necessary in the side discharge form.

図1及び図4に示すように、案内部材30は、モーアデッキ20の排出口25の開口形状に合わせて平板を折り曲げ加工することにより、側面視で下方側が開放されたチャンネル状に形成されている。
この案内部材30の平面視での形状は、図2乃至図4に示すように、倒伏姿勢における平面視での形状が内方側の接続部30aから外方側の放出部30bに向かって末広がり状に構成されており、刈草を所定範囲内で広角に放出できるように構成されている。
As shown in FIGS. 1 and 4, the guide member 30 is formed in a channel shape in which a lower side is opened in a side view by bending a flat plate in accordance with the opening shape of the discharge port 25 of the mower deck 20. .
As shown in FIGS. 2 to 4, the shape of the guide member 30 in plan view is such that the shape of the guide member 30 in plan view in the lying posture spreads from the inner connection portion 30 a toward the outer discharge portion 30 b. It is comprised so that a cut grass can be discharge | released at a wide angle within a predetermined range.

案内部材30の上面側には、前後一対の連結アーム31,32が溶接固定されている。
前側の連結アーム31及び後側の連結アーム32には、それぞれ案内部材30の接続部30a側端縁よりも少しモーアデッキ20側へ延出されていて、その延出箇所に連結孔31a,32aが形成されている。
モーアデッキ20側にも前後一対の取付ブラケット26,27が立設されていて、この前後一対の取付ブラケット26,27には取付孔26a,27aが形成されている。そして、前後の取付ブラケット26,27に形成された取付孔26a,27aと、前後の連結アーム31,32に形成された連結孔31a,32aと、にわたって連結ロッド28が挿通され、モーアデッキ20に対して案内部材30が、連結ロッド28の軸心P3回りで上下揺動可能に取り付けられる。つまり、連結ロッド28の軸心P3が、案内部材30を前後向きの軸心P3周りで揺動作動させるための軸心となっている。
A pair of front and rear connecting arms 31 and 32 are fixed to the upper surface of the guide member 30 by welding.
Each of the front side connecting arm 31 and the rear side connecting arm 32 extends slightly toward the moor deck 20 side from the edge of the connecting member 30a side of the guide member 30, and connecting holes 31a and 32a are provided at the extended portions. Is formed.
A pair of front and rear mounting brackets 26 and 27 are also erected on the mower deck 20 side, and mounting holes 26a and 27a are formed in the pair of front and rear mounting brackets 26 and 27. Then, the connecting rod 28 is inserted through the mounting holes 26a and 27a formed in the front and rear mounting brackets 26 and 27 and the connecting holes 31a and 32a formed in the front and rear connecting arms 31 and 32, and the moor deck 20 is inserted. The guide member 30 is attached so as to be swingable up and down around the axis P3 of the connecting rod 28. That is, the axis P3 of the connecting rod 28 is an axis for swinging the guide member 30 about the axis P3 in the front-rear direction.

前後の連結アーム31,32同士の間で、連結ロッド28の外周側にねじりバネ29(付勢機構に相当する)が外嵌され、ねじりバネ29の一端側がモーアデッキ20側に当接し、他端側が案内部材30に当接している。このねじりバネ29の付勢力によって案内部材30は常時下方へ押し付け付勢されている。この付勢作用、及び後述するロック機構のロック作用により、案内部材30が乗用型芝刈り機の走行等によって上下に動き難いように構成されている。   Between the front and rear connecting arms 31, 32, a torsion spring 29 (corresponding to an urging mechanism) is fitted on the outer peripheral side of the connecting rod 28, one end side of the torsion spring 29 abuts on the mower deck 20 side, and the other end The side is in contact with the guide member 30. The guide member 30 is always pressed and biased downward by the biasing force of the torsion spring 29. Due to this urging action and the locking action of a locking mechanism, which will be described later, the guide member 30 is configured to be difficult to move up and down by traveling of a riding lawnmower or the like.

モーアデッキ20側に設けられた前後一対の取付ブラケット26,27のうち、前方側の取付ブラケット26(被係止部材に相当する)には、前記取付孔26aとは別の係合孔26bが形成されている。
そして、その前方側の取付ブラケット26に連結される前方側の連結アーム31には、前記係合孔26bに対して挿抜可能なストッパーピン33(係止部材に相当する)が取り付けられている。
Of the pair of front and rear mounting brackets 26 and 27 provided on the mower deck 20 side, the front mounting bracket 26 (corresponding to a locked member) is formed with an engagement hole 26b different from the mounting hole 26a. Has been.
A stopper pin 33 (corresponding to a locking member) that can be inserted into and removed from the engaging hole 26b is attached to the front connecting arm 31 that is connected to the front mounting bracket 26.

つまり、図3乃至図6に示すように、倒伏姿勢にある案内部材30の前方側の連結アーム31の後面側には、平面視で前方側の連結アーム31に対向する側が開放されたチャンネル状のガイド枠34が設けられている。
このガイド枠34に、案内部材30の上面側に沿う水平方向のスライド軸部33aと、そのスライド軸部33aに交差する方向に屈曲した起立軸部33bとを備えるL字状のストッパーピン33が後方側から差し込まれている。
ストッパーピン33のうち、ガイド枠34内に挿入された部位のスライド軸部33aに、ガイド枠34の内部に装填されたコイル状の係止付勢バネ35が外嵌されている。ストッパーピン33には、スライド軸部33aを貫通するバネ受けピン36が設けられていて、このバネ受けピン36とガイド枠34の内面との間に挟持される状態で前記係止付勢バネ35が装着されている。
That is, as shown in FIGS. 3 to 6, a channel shape in which the side facing the front connection arm 31 in a plan view is opened on the rear surface side of the front connection arm 31 of the guide member 30 in the lying posture. The guide frame 34 is provided.
An L-shaped stopper pin 33 having a horizontal slide shaft portion 33 a along the upper surface side of the guide member 30 and an upright shaft portion 33 b bent in a direction intersecting the slide shaft portion 33 a is provided on the guide frame 34. It is inserted from the rear side.
Of the stopper pin 33, a coil-shaped locking biasing spring 35 loaded inside the guide frame 34 is externally fitted to a slide shaft portion 33 a of a portion inserted into the guide frame 34. The stopper pin 33 is provided with a spring receiving pin 36 penetrating the slide shaft portion 33a, and the latching biasing spring 35 is held between the spring receiving pin 36 and the inner surface of the guide frame 34. Is installed.

前方側の連結アーム31には、ストッパーピン33のスライド軸部33aの軸端が嵌入する貫通孔31bが形成されている。この貫通孔31bは、図6に示すように案内部材30が起立姿勢に操作されていると、取付ブラケット26の係合孔26bとは外れた位置にあり、案内部材30が倒伏姿勢に操作されると、図5に示すように係合孔26bと合致する位置に設けられている。
したがって、案内部材30が倒伏姿勢に操作されると、係止付勢バネ35の作用により、スライド軸部33aが連結アーム31の貫通孔31b及び取付ブラケット26の係合孔26bを貫通して、図5に示す倒伏姿勢でロックされる。
つまり、上記のストッパーピン33、係合孔26bを備えた取付ブラケット26、及び係止付勢バネ35が、案内部材30を倒伏姿勢で固定するためのロック機構を構成している。
The connecting arm 31 on the front side is formed with a through hole 31b into which the shaft end of the slide shaft portion 33a of the stopper pin 33 is fitted. As shown in FIG. 6, when the guide member 30 is operated in the standing posture, the through hole 31b is in a position away from the engagement hole 26b of the mounting bracket 26, and the guide member 30 is operated in the lying posture. Then, as shown in FIG. 5, it is provided at a position that matches the engagement hole 26b.
Therefore, when the guide member 30 is operated in the lying down posture, the slide shaft portion 33a passes through the through hole 31b of the connecting arm 31 and the engagement hole 26b of the mounting bracket 26 by the action of the locking biasing spring 35. Locked in the lying posture shown in FIG.
That is, the stopper pin 33, the mounting bracket 26 provided with the engagement hole 26b, and the latching biasing spring 35 constitute a lock mechanism for fixing the guide member 30 in the lying posture.

案内部材30のロックを解除するには、ストッパーピン33の起立軸部33bを把持して、スライド軸部33aの端部を取付ブラケット26の係合孔26bから抜き出せばよい。スライド軸部33aの端部が係合孔26bから抜き出された状態で、案内部材30を図6に示すように起立姿勢に姿勢変更すると、ストッパーピン33のスライド軸部33aの端部は、係合孔26bから外れた位置で係止付勢バネ35の作用により取付ブラケット26に押し付けられた状態となる。   In order to release the lock of the guide member 30, the upright shaft portion 33 b of the stopper pin 33 may be grasped and the end portion of the slide shaft portion 33 a may be extracted from the engagement hole 26 b of the mounting bracket 26. When the guide member 30 is changed to the standing posture as shown in FIG. 6 with the end portion of the slide shaft portion 33a being extracted from the engagement hole 26b, the end portion of the slide shaft portion 33a of the stopper pin 33 is At a position disengaged from the engagement hole 26b, the engagement urging spring 35 is pressed against the mounting bracket 26.

しかし、この係止付勢バネ35で係合側へ付勢されたストッパーピン33と取付ブラケット26との当接による摩擦抵抗よりも、案内部材30を起立姿勢から倒伏姿勢側へ付勢するねじりバネ29の復帰付勢力が強く設定されている。このため、案内部材30から手を離して起立姿勢で支持している状態を解除すると、案内部材30は、案内部材30の自重とねじりバネ29の復帰付勢力によって倒伏姿勢側へ自動的に復帰する。そして、倒伏姿勢に達すると、係止付勢バネ35の作用により、スライド軸部33aが連結アーム31の貫通孔31b及び取付ブラケット26の係合孔26bを貫通して、倒伏姿勢でロックされた状態となる。   However, the torsion that urges the guide member 30 from the standing posture to the lying posture side rather than the frictional resistance caused by the contact between the stopper pin 33 urged to the engagement side by the locking urging spring 35 and the mounting bracket 26. The return biasing force of the spring 29 is set strongly. For this reason, when releasing the hand from the guide member 30 and releasing the supporting state in the standing posture, the guide member 30 automatically returns to the lying posture side by the weight of the guide member 30 and the return biasing force of the torsion spring 29. To do. When the lying posture is reached, the slide urging spring 35 passes through the through hole 31b of the connecting arm 31 and the engaging hole 26b of the mounting bracket 26 and is locked in the lying posture by the action of the latching biasing spring 35. It becomes a state.

[他の実施形態の1]
実施の形態では、案内部材30を前記倒伏姿勢側へ弾性付勢する付勢機構としてねじりバネ29を備えた構造のものを例示したが、この構造に限られるものではない。
例えば、モーアデッキ20と案内部材30とを、図示はしないが、引っ張りバネや押圧バネで、案内部材30を倒伏姿勢とする側へ付勢するなどの、適宜の構造を採用してもよい。
その他の構成は、前述した実施形態と同様の構成を採用すればよい。
[Other Embodiment 1]
In the embodiment, the structure having the torsion spring 29 is illustrated as an urging mechanism for elastically urging the guide member 30 toward the lying posture. However, the structure is not limited to this structure.
For example, although not shown, the moor deck 20 and the guide member 30 may employ an appropriate structure such as urging the guide member 30 toward the lying posture with a tension spring or a pressing spring.
Other configurations may be the same as those in the above-described embodiment.

[他の実施形態の2]
実施の形態では、ロック機構として、被係止部材に相当する係合孔26bを備えた取付ブラケット26,27がモーアデッキ20に設けられ、係止部材に相当するストッパーピン33が案内部材30側に設けられた構造のものを例示したが、この構造に限られるものではない。
例えば、被係止部材に相当する係合孔26bを備えた取付ブラケット26が案内部材30側に設けられ、係止部材に相当するストッパーピン33がモーアデッキ20に設けられた構造のものであっても差し支えない。
その他の構成は、前述した実施形態と同様の構成を採用すればよい。
[Other Embodiment 2]
In the embodiment, as the lock mechanism, mounting brackets 26 and 27 having an engagement hole 26b corresponding to a locked member are provided in the mower deck 20, and a stopper pin 33 corresponding to the locking member is provided on the guide member 30 side. Although the thing of the structure provided was illustrated, it is not restricted to this structure.
For example, the mounting bracket 26 provided with the engagement hole 26b corresponding to the locked member is provided on the guide member 30 side, and the stopper pin 33 corresponding to the locking member is provided on the mower deck 20. There is no problem.
Other configurations may be the same as those in the above-described embodiment.

[他の実施形態の3] [3 of other embodiment]

実施の形態では、ロック機構として、係止付勢バネ35を組み込んだ構造のものを例示したが、必ずしもこの構造に限られるものではない。
例えば、係止付勢バネ35を省いて、係止部材に相当するストッパーピン33と、被係止部材に相当する係合孔26b付きの取付ブラケット26を備えたものによって構成しても良い。
この場合、案内部材30は、自重とねじりバネ29の復帰付勢力によって倒伏姿勢側へ自動的に復帰するが、係止付勢バネ35を備えていないので自動ロック状態とはならない。したがって、ロックが必要な場合、手動操作によりストッパーピン33を係合孔26bに押し込んで、ロック状態とするように構成されたものであってもよい。
その他の構成は、前述した実施形態と同様の構成を採用すればよい。
In the embodiment, as the lock mechanism, the structure incorporating the latching biasing spring 35 is illustrated, but the structure is not necessarily limited to this structure.
For example, the latch urging spring 35 may be omitted, and the stopper pin 33 corresponding to the locking member and the mounting bracket 26 with the engagement hole 26b corresponding to the locked member may be configured.
In this case, the guide member 30 automatically returns to the lying down posture side by its own weight and the return biasing force of the torsion spring 29, but does not have the locking biasing spring 35 and therefore does not automatically lock. Therefore, when the lock is necessary, the stopper pin 33 may be pushed into the engagement hole 26b by a manual operation to be in a locked state.
Other configurations may be the same as those in the above-described embodiment.

本発明は、実施の形態で示したような、前輪1Fと後輪1Rの間の下腹部にモーア2を連結した乗用型芝刈り機(いわゆるゼロターンモーア)に限らず、前輪1Fの前方にモーア2を連結した乗用型芝刈り機(いわゆるフロントモーア(図示せず))の場合にも同様に適用できる。また、乗用型芝刈り機に限らず、歩行型芝刈り機のモーア2においても同様に適用することができる。   The present invention is not limited to the riding lawn mower (so-called zero-turn mower) in which the mower 2 is connected to the lower abdomen between the front wheel 1F and the rear wheel 1R as shown in the embodiment, but in front of the front wheel 1F. The present invention can be similarly applied to a riding lawn mower connected with the mower 2 (so-called front mower (not shown)). Further, the present invention is not limited to the riding-type lawn mower but can be similarly applied to the mower 2 of the walking-type lawn mower.

20 モーアデッキ
21,22 回転ブレード
25 排出口
26 被係止部材
29 付勢機構
30 案内部材
33 係止部材
35 係止付勢バネ
P1,P2 縦軸心
20 Moore deck 21, 22 Rotating blade 25 Discharge port 26 Locked member 29 Biasing mechanism 30 Guide member 33 Locking member 35 Locking biasing spring P1, P2 Vertical axis

Claims (3)

モーアデッキの内部に縦軸心周りで回転駆動される複数の回転ブレードが配設され、
前記回転ブレードで刈り取った刈草を排出する排出口が前記モーアデッキの横一側部に形成され、
前記排出口の横外側に、その排出口から放出された刈草を横外方に案内する案内部材が備えられ、
前記案内部材が、起立して前記排出口を開放する起立姿勢と、倒伏して前記排出口からの放出刈草を案内する倒伏姿勢とに姿勢変更可能に構成されたモーアにおいて、
前記案内部材を前記倒伏姿勢側へ弾性付勢する付勢機構と、
前記案内部材を前記倒伏姿勢で位置固定するロック機構と、が備えられているモーア。
A plurality of rotating blades that are driven to rotate around the longitudinal axis are arranged inside the moor deck,
A discharge port for discharging cut grass cut by the rotating blade is formed on a lateral side of the mower deck,
A guide member is provided on the lateral outer side of the discharge port to guide the cut grass released from the discharge port laterally outward.
In the mower configured to be able to change the posture into an upright posture in which the guide member stands up and opens the discharge port, and a lying down posture in which the guide member lies down and guides the released grass from the discharge port,
An urging mechanism for elastically urging the guide member toward the lying posture;
A mower provided with a locking mechanism for fixing the position of the guide member in the lying posture.
前記ロック機構に、前記モーアデッキとそのモーアデッキに対して揺動作動可能に支持された前記案内部材とのうちの、いずれか一方に装備された係止部材と、いずれか他方に装備された被係止部材と、前記係止部材を前記被係止部材との係合側へ弾性付勢する係止付勢バネと、が備えられている請求項1記載のモーア。   The lock mechanism includes a locking member mounted on one of the mower deck and the guide member supported so as to be swingable with respect to the mower deck, and an engaged member mounted on the other. The mower according to claim 1, further comprising: a stopping member; and a locking biasing spring that elastically biases the locking member toward the engagement side with the locked member. 前記案内部材を前記起立姿勢から前記倒伏姿勢側へ付勢する前記付勢機構の復帰付勢力が、前記係止付勢バネで前記係合側へ付勢された前記係止部材と前記被係止部材との当接による摩擦抵抗よりも強く設定されている請求項2記載のモーア。   The locking member and the engaged member are urged toward the engagement side by the locking biasing spring by a return biasing force of the biasing mechanism that biases the guide member from the standing posture to the lying posture. The mower according to claim 2, wherein the mower is set to be stronger than a frictional resistance caused by contact with the stop member.
JP2016235231A 2016-12-02 2016-12-02 Moor Active JP6707017B2 (en)

Priority Applications (2)

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JP2016235231A JP6707017B2 (en) 2016-12-02 2016-12-02 Moor
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11576304B2 (en) * 2019-05-17 2023-02-14 Andreas Stihl Ag & Co. Kg Lawn mower
JP7454446B2 (en) 2020-05-18 2024-03-22 株式会社マキタ lawn mower

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11576304B2 (en) * 2019-05-17 2023-02-14 Andreas Stihl Ag & Co. Kg Lawn mower
JP7454446B2 (en) 2020-05-18 2024-03-22 株式会社マキタ lawn mower

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