JP3656143B2 - Riding farm equipment - Google Patents

Riding farm equipment Download PDF

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Publication number
JP3656143B2
JP3656143B2 JP26416195A JP26416195A JP3656143B2 JP 3656143 B2 JP3656143 B2 JP 3656143B2 JP 26416195 A JP26416195 A JP 26416195A JP 26416195 A JP26416195 A JP 26416195A JP 3656143 B2 JP3656143 B2 JP 3656143B2
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Japan
Prior art keywords
speed
stage
transmission lever
operated
speed increasing
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JP26416195A
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Japanese (ja)
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JPH09104258A (en
Inventor
康彦 柏村
憲一郎 山下
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Yanma Agricultural Equipment Co Ltd
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Yanma Agricultural Equipment Co Ltd
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  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Transplanting Machines (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、乗用田植機などの乗用農作業機、詳しくは、移動速度段、作業速度段及び後速段を切換える主変速レバーと、走行駆動系の回転を上げる増速手段とを備えた乗用農作業機に関する。
【0002】
【従来の技術】
従来、乗用田植機などの乗用農作業機は、田植え作業を行わない移動速度段、田植え作業を行う作業速度段、後速段を切換える主変速レバーと、走行駆動系の回転を上げる副変速レバー・増速ペダルなどの増速手段とを備えている。そして、各変速段に応じて前記増速手段を操作することにより、各変速段において増減速が行えるようにしている。
【0003】
【発明が解決しようとする課題】
以上のように従来の乗用農作業機は、各変速段において増減速を可能としているため、水田などでの農作業時に比べて移動抵抗の少ない路上走行時、すなわち移動速度段での走行時、或はトラックへの積込・積降し時等に後速段に入れて機体を後退させたりするような時、増速手段が操作されると危険速度になり、機体が不安定となって転倒事故を招く等のおそれがある不具合があつた。
【0004】
本発明は、主変速レバーを移動速度段または後速段に切換えての走行時に増速手段が操作された場合、走行駆動系が増速になるのを防止することができる乗用農作業機を提供することをその主目的とする。
【0005】
【課題を解決するための手段】
本発明は、以上の主目的を達成するため、請求項1記載の発明は、図1に示すように、移動速度段、作業速度段及び後速段を切換える主変速レバーと、操作により走行駆動系の回転を上げる増速手段とを備えた乗用農作業機において、前記主変速レバーが移動速度段及び後速段の一方へ操作されたとき、前記増速手段の操作による前記走行駆動系の増速動作を規制する規制手段を備えることを特徴とする。
【0006】
【発明の作用効果】
請求項1記載の発明では、図1に示すように、主変速レバーが移動速度段及び後速段の一方に操作されたとき、規制手段を動作させて増速手段による増速動作を規制するから、主変速レバーを移動速度段または後速段に切換えての走行時に増速手段が操作されるとき、走行駆動系が増速になるのを防止することができるのである。従って、移動速度段での走行時、或はトラックへの積込・積降し時等に後速段に入れて機体を後退させたりするような時、増速手段が操作されたとしても、危険速度になることなく、機体の安定性を良好に保つことができるのである。
【0007】
【発明の実施の形態】
図4,図5に示した実施形態の乗用農作業機は、運転席11及びハンドル12をもつ機体10の左右に、エンジン13に連動する小径で幅の狭い前輪14,14と、同じくトランスミッション15を介してエンジン13に連動する大径で幅の広い後輪16,16とを有し、機体10の後方に、油圧シリンダ17と、これに連動するロワーリンク18a並びにトップリンク18b及び門形支柱18cをもつ昇降装置18を介して田植装置2を連結した乗用田植機で、前記トランスミッション15は、主変速装置及び副変速装置を備えており、また、田植装置2は前記トランスミッション15側から延びるPTO軸19に連動させている。
【0008】
また、前記機体10における運転席11の近くには、前記主変速装置を「移動速度」段、「作業速度」段及び「後速」段に切換える主変速レバー3と、前記副変速装置を「増速」段と、「低速」段とに切換えてエンジン13と後輪16,16間における走行駆動系の回転を上げる副変速レバー4と、前記エンジン13のアクセルに連動し踏込み操作により走行駆動系の回転を上げる増速ペダル5と、前記各後輪16,16に備えたブレーキ装置を操作する一対のブレーキペダル6a,6bとを備え、運転席11に座った姿勢で主変速レバー3と、副変速レバー4と、増速ペダル5と、ブレーキペダル6a,6bとを操作することができるようにしている。尚、副変速レバー4と増速ペダル5とで、走行駆動系の回転を上げる増速手段Sを構成している。この増速手段Sの副変速レバー4と増速ペダル5とは、何れか一つであってもよい。
【0009】
前記主変速レバー3は、図6(イ)に示すように変速ガイド30のガイド孔31に沿って移動させることにより、「移動速度」段位置、「中立」位置、「作業速度」段位置、「苗継ぎ」位置及び「後速」段位置に切換えることができるようにしている。また、副変速レバー4は、図6(ロ)に示すように、変速ガイド40のガイド孔41に沿って移動させることにより、前記「増速」段位置と、「低速」段位置の他、所定のマーカをセットさせる「マーカ」位置と、「中立」位置と、油圧シリンダ17をして昇降装置18を上昇させる「上」位置とに切換えることができ、「下」位置から「マーカ」位置側の領域Aでは油圧シリンダ17をして昇降装置2を下降させ、「切り」位置から「中立」位置側の領域Bでは、前記PTO軸19の動力取出しを切りに切換えることができるようにしている。
【0010】
更に、前記主変速レバー3と、前記副変速レバー4の近傍位置との間には、主変速レバー3の「移動速度」段及び「後速」段の一方への操作時、前記副変速レバー4による増速動作を規制する規制手段7を設けている。
【0011】
この規制手段7は、機体10における副変速レバー4の近傍位置に枢支軸71を介して揺動自由に枢支する規制アーム72と、この規制アーム72と前記主変速レバー3との間に張設する連動索73とから成る。この連動索73は、一端を主変速レバー3の長さ方向中間部に掛止し、他端を規制アーム72に掛止するインナーワイヤ73aと、該インナーワイヤ73aをガイドするアウタ筒73bとから成り、このアウタ筒73bの一端を、前記主変速レバー3の支持位置に対しグリップ3a側に変位した位置に主変速レバー3の回転中心線と平行な横軸を介して回動自由に支持するアウタ受け74に係止し、他端を、規制アーム72の枢支位置近くに固定した受体75に係止して、アウタ受け74の回転中心O1からインナーワイヤ73aの主変速レバー3への掛止点O2までの長さを、主変速レバー3を「移動速度」段及び「後速」段の一つに操作したときの長さ「H1」が、主変速レバー3を「作業速度」段及び「中立」位置の一つに操作したときの長さ「H2」よりも長くなるようにしている。
【0012】
斯くすることにより、主変速レバー3を「作業速度」段又は「中立」位置から「移動速度」段又は「後速」段位置に操作したとき、インナーワイヤ73aが引張られて規制アーム72は図1の鎖線に示すように規制位置に揺動し、前記副変速レバー4の「増速段」位置への移動(図1の矢印方向)を規制することができる。また、主変速レバー3を「移動速度」段又は「後速」段位置から「作業速度」段又は「中立」位置に操作したとき、インナーワイヤ73aが弛緩され、規制アーム72は図1実線の非規制位置に復帰する。従って、副変速レバー4を「増速」段位置に移動させることができる。
【0013】
尚、前記規制手段7は、連動索73を用いて行う他、図示していないが、例えば主変速レバー3が「移動速度」段又は「後速」段位置に操作されたとき動作する検出スイッチと、該検出スイッチから出力される検出信号により動作して前記揺動アーム72を規制位置に作動させる電磁ソレノイドとを用いてもよい。この場合、前記規制アーム72をなくし、前記電磁ソレノイドに連動するロッドで副変速レバー4の移動を規制するようにしてもよい。
【0014】
また、以上の実施形態では、副変速レバー4による増速動作を規制する規制手段7について説明したが、その他、前記増速ペダル5による増速動作を規制するようにしてもよい。この場合の規制手段7は、前記した各実施形態と同様であるためその詳細な説明を省略する。
【0015】
また、図7,図8に示した実施形態では、前記各ブレーキペダル6a,6bを連結して同時に動作させるコネクタ61と、このコネクタ61の動作に連動して動作し、前記増速ペダル5による増速動作を規制するペダル規制機構60を設けている。
【0016】
前記コネクタ61は、各ブレーキペダル6a,6bの踏面と背面とに対向する一対の細長板体から成り、このコネクタ61の一端部を一方のブレーキペダル6aに揺動自在に枢支し、このコネクタ61を他方のブレーキペダル6b側に倒伏さることにより各ブレーキペダル6a,6bを連結し、これらブレーキペダル6a,6bを同時に動作させるようにしている。
【0017】
また、前記ペダル規制機構60は、機体10における増速ペダル5の近傍位置に枢支軸62を介して揺動自由に枢支する規制アーム63と、この規制アーム63と前記コネクタ61の先端部との間に張設する連動索64とから成る。この連動索64は、一端をコネクタ61の先端部に掛止し、他端を規制アーム63に掛止するインナーワイヤ64aと、該インナーワイヤ64aをガイドするアウタ筒64bとから成り、このアウタ筒64bの一端を、前記ブレーキペダル6bの脚部に固定した受体65に係止し、他端を、規制アーム63の枢支位置近くに固定した受体66に係止している。そして、前記枢支軸62と規制アーム63との間に、該規制アーム63を常時規制位置を付勢するリターンばね67を介装すると共に、枢支軸62の端部に連結するワイヤ受け68と規制アーム63との間に、該規制アーム63を揺動範囲中間位置に対し一方側に選択的に付勢する支点越えばね69を介装し、コネクタ61が図7のようにペダル連結位置に倒伏すると、リターンばね67の力で規制アーム63が図7実線のように規制位置に移動し、増速ペダル5の動作を規制でき、また、コネクタ61を非連結位置(図7の反時計方向位置)に揺動させて、各ブレーキペダル6a,6bの連結を解除すると、連動索64のインナーワイヤ64aがリターンばね67に抗して引張られ、規制アーム63が図7鎖線の非規制位置に移動する。
【0018】
斯くすることにより、移動速度段で路上走行時、或はトラックへの積込・積降し時など、ブレーキペダル6a,6bをコネクタ61で連結して、同時に動作させ、左右後輪16,16を同時に制動するようにした場合、リターンばね67により規制アーム63は図7の実線に示すように規制位置に揺動し、前記増速ペダル5の踏込みを規制することができる。従って、ブレーキペダル6a,6bをコネクタ61で連結させたときは、故意操作及び誤操作による増速を防止できるのである。また、コネクタ61を非連結位置に待避させて各ブレーキペダル6a,6bを独立して動作させ得るようにした場合、ペダル規制機構60のインナーワイヤ64aが引張られ、図7鎖線に示すように規制アーム63は非規制位置に移動する。
【0019】
尚、前記ペダル規制機構60は、連動索64を用いて行う他、図9に示すように、例えばコネクタ61が連結位置に操作されたとき動作する検出スイッチ60aと、該検出スイッチ60aから出力される検出信号により動作して前記揺動アーム63を規制位置に作動させる電磁ソレノイド(図示せず)とを用いてもよい。この場合、前記規制アームをなくし、前記電磁ソレノイドに連動するロッドで増速ペダル5の動作を規制するようにしてもよい。
【0020】
また、図10に示した実施形態では、前記主変速レバー3を「苗継ぎ」位置に操作したとき、油圧シリンダ17をして昇降装置18を動作させ、植付位置に下降している田植装置2を、前記副変速レバー4で「中立」となる位置に若干上昇させるようにしている。即ち、主変速レバー3が「苗継ぎ」位置に操作されたとき動作する検出スイッチ20と、該検出スイッチ20から出力される検出信号により動作して前記油圧シリンダ17のコントロールバルブ21を制御し、該コントロールバルブ21のスプール21aを、昇降装置18を上昇させる側に動作させる電磁ソレノイド22とを設けている。斯くすることにより、田植装置2におけるフロート23の長さが短いとか、或は田植装置2に施肥機24がセットされている場合において、苗継ぎ時に、副変速レバー4が図6(ロ)の領域Aに操作され、田植装置2が植付位置に下降して植付け状態になっているとしても、フロート23が沈み気味になるのを有効に防止できると共に、施肥機24の施肥部が湿気を帯び難くできるのである。
【0021】
尚、前記副変速レバー4は、図6(ロ)の領域Aから領域Bの「上」位置に操作したとき、油圧シリンダ17をして昇降装置18を若干上昇させた後、オートリターン手段により副変速レバー4を「中立」位置に自動復帰させるようにしてもよい。
【図面の簡単な説明】
【図1】本発明乗用農作業機の主変速レバーと増速手段と規制手段とを取り出した概略説明図。
【図2】同図1の変速レバー部分における平面図。
【図3】同増速手段による増速動作を規制した状態の図1の側面図。
【図4】同乗用農作業機の全体構造を示す側面図。
【図5】同乗用農作業機の機体部分のみの平面図。
【図6】同主変速レバーと増速手段の変速ガイドを示す説明図
【図7】同ブレーキペダルと増速ペダルと規制機構とを取り出した概略説明図。
【図8】同図7の増速ペダル部分における底面図。
【図9】同図7の別の実施形態を示す説明図。
【図10】更に別の実施形態を示す説明図。
【符号の説明】
3……主変速レバー
7……規制手段
S……増速手段
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a riding farm work machine such as a riding rice transplanter, and more specifically, a riding farm work including a main transmission lever that switches between a moving speed stage, a working speed stage and a rear speed stage, and a speed increasing means for increasing the rotation of a traveling drive system. Related to the machine.
[0002]
[Prior art]
Conventionally, passenger farming machines such as riding rice transplanters have a main transmission lever that switches between a moving speed stage that does not perform rice planting work, a work speed stage that performs rice planting work, and a rear speed stage, and a sub-transmission lever that increases the rotation of the traveling drive system. And a speed increasing means such as a speed increasing pedal. Then, by operating the speed increasing means according to each gear stage, acceleration / deceleration can be performed at each gear stage.
[0003]
[Problems to be solved by the invention]
As described above, conventional riding farm machines can increase and decrease speed at each shift stage, so when traveling on the road with less movement resistance than when farming in paddy fields, that is, when traveling at a moving speed stage, or When loading and unloading on a truck, etc., when the aircraft is moved backward and moved backwards, it becomes dangerous speed if the speed increasing means is operated, and the aircraft becomes unstable and falls. There was a problem that could lead to
[0004]
The present invention provides a riding farm machine capable of preventing the traveling drive system from increasing when the speed increasing means is operated during traveling with the main shift lever switched to the moving speed stage or the rear speed stage. Its main purpose is to do.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned main object, the present invention as described in claim 1 includes a main shift lever that switches between a moving speed stage, a working speed stage, and a rear speed stage as shown in FIG. And a speed increasing means for increasing the rotation of the system.When the main shift lever is operated to one of the moving speed stage and the rear speed stage, the traveling drive system is increased by the operation of the speed increasing means. It is provided with the control means which controls high speed operation.
[0006]
[Effects of the invention]
In the first aspect of the invention, as shown in FIG. 1, when the main speed change lever is operated to one of the moving speed stage and the rear speed stage, the regulating means is operated to regulate the speed increasing operation by the speed increasing means. Therefore, when the speed increasing means is operated during traveling with the main speed change lever switched to the moving speed stage or the rear speed stage, it is possible to prevent the traveling drive system from increasing in speed. Therefore, even when the speed increasing means is operated when traveling at the moving speed stage, or when entering the rear speed stage when loading or unloading the truck, etc. The stability of the aircraft can be maintained satisfactorily without becoming a dangerous speed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
4 and 5, the riding farm work machine of the embodiment shown in FIGS. 4 and 5 has a small-diameter and narrow front wheels 14 and 14 interlocking with the engine 13 and a transmission 15 on the left and right sides of the body 10 having the driver's seat 11 and the handle 12. Through the rear side of the fuselage 10, a hydraulic cylinder 17, a lower link 18 a, a top link 18 b, and a portal column 18 c, which are linked to the hydraulic cylinder 17. The transmission 15 includes a main transmission and a sub-transmission, and the rice transplanting apparatus 2 has a PTO shaft extending from the transmission 15 side. 19 is linked.
[0008]
Further, near the driver's seat 11 in the fuselage 10, the main transmission lever 3 that switches the main transmission device to the “movement speed” stage, the “working speed” stage, and the “rear speed” stage, and the auxiliary transmission apparatus “ The sub-shift lever 4 that increases the speed of the traveling drive system between the engine 13 and the rear wheels 16, 16 by switching between the “acceleration” stage and the “low speed” stage, and the travel drive by the stepping operation in conjunction with the accelerator of the engine 13 A speed increasing pedal 5 for increasing the rotation of the system, and a pair of brake pedals 6a and 6b for operating a brake device provided in each of the rear wheels 16 and 16, and the main transmission lever 3 in a posture sitting on the driver's seat 11; The auxiliary transmission lever 4, the speed increasing pedal 5, and the brake pedals 6a and 6b can be operated. The auxiliary transmission lever 4 and the speed increasing pedal 5 constitute speed increasing means S for increasing the rotation of the traveling drive system. Any one of the auxiliary transmission lever 4 and the speed increasing pedal 5 of the speed increasing means S may be provided.
[0009]
The main speed change lever 3 is moved along the guide hole 31 of the speed change guide 30 as shown in FIG. 6 (a), so that the “movement speed” step position, the “neutral” position, the “working speed” step position, It is possible to switch to the “seedling” position and the “rear speed” stage position. Further, as shown in FIG. 6 (b), the auxiliary transmission lever 4 is moved along the guide hole 41 of the transmission guide 40, so that the “acceleration” step position, the “low speed” step position, The “marker” position where a predetermined marker is set, the “neutral” position, and the “upper” position where the hydraulic cylinder 17 is moved to raise the lifting device 18 can be switched from the “lower” position to the “marker” position. In the region A on the side, the lifting / lowering device 2 is lowered by moving the hydraulic cylinder 17, and in the region B on the “neutral” position side from the “cut” position, the power take-out of the PTO shaft 19 can be switched to cut. Yes.
[0010]
Further, when the main transmission lever 3 is operated to one of the “movement speed” stage and the “rear speed” stage between the main transmission lever 3 and the position near the sub transmission lever 4, the sub transmission lever 4 is provided with a restricting means 7 for restricting the speed-up operation by 4.
[0011]
The restricting means 7 includes a restricting arm 72 pivotally supported by a pivot shaft 71 at a position in the vicinity of the auxiliary speed change lever 4 in the airframe 10, and between the restricting arm 72 and the main speed change lever 3. It consists of an interlocking cable 73 to be stretched. The interlocking cord 73 includes an inner wire 73 a that has one end hooked to the middle portion in the length direction of the main transmission lever 3 and the other end hooked to the restriction arm 72, and an outer cylinder 73 b that guides the inner wire 73 a. Thus, one end of the outer cylinder 73b is rotatably supported through a horizontal axis parallel to the rotation center line of the main transmission lever 3 at a position displaced toward the grip 3a with respect to the support position of the main transmission lever 3. The other end is locked to the outer support 74 and the other end is locked to a receiving body 75 fixed near the pivotal support position of the restricting arm 72, so that the rotation center O1 of the outer receiver 74 is connected to the main transmission lever 3 of the inner wire 73a. The length to the latching point O2 is the length “H1” when the main transmission lever 3 is operated to one of the “movement speed” stage and the “rear speed” stage, and the main transmission lever 3 is set to “working speed”. When operated to one of the steps and the “neutral” position It is set to be longer than the length "H2" of.
[0012]
Thus, when the main speed change lever 3 is operated from the “working speed” stage or the “neutral” position to the “moving speed” stage or the “rear speed” stage position, the inner wire 73a is pulled and the restriction arm 72 is As shown by a chain line 1, it can be swung to a restricting position to restrict the movement of the auxiliary transmission lever 4 to the “acceleration stage” position (arrow direction in FIG. 1). When the main speed change lever 3 is operated from the “movement speed” or “rear speed” position to the “working speed” position or the “neutral” position, the inner wire 73a is relaxed, and the restricting arm 72 is shown in FIG. Return to the non-restricted position. Therefore, the auxiliary transmission lever 4 can be moved to the “speed increase” position.
[0013]
The restricting means 7 is performed by using the interlocking cable 73 and is not shown. However, for example, a detection switch that operates when the main transmission lever 3 is operated to the “moving speed” stage or the “rear speed” stage position. And an electromagnetic solenoid that operates in accordance with a detection signal output from the detection switch and operates the swing arm 72 to a restricted position. In this case, the restriction arm 72 may be eliminated, and the movement of the auxiliary transmission lever 4 may be restricted by a rod that is interlocked with the electromagnetic solenoid.
[0014]
In the above embodiment, the restricting means 7 for restricting the speed increasing operation by the auxiliary transmission lever 4 has been described. However, the speed increasing operation by the speed increasing pedal 5 may be restricted. Since the restricting means 7 in this case is the same as that in each of the embodiments described above, detailed description thereof is omitted.
[0015]
Further, in the embodiment shown in FIGS. 7 and 8, a connector 61 that connects the brake pedals 6 a and 6 b to operate simultaneously, and operates in conjunction with the operation of the connector 61, and is operated by the speed increasing pedal 5. A pedal restricting mechanism 60 for restricting the speed increasing operation is provided.
[0016]
The connector 61 is composed of a pair of elongated plates facing the tread surface and the back surface of each brake pedal 6a, 6b, and one end of the connector 61 is pivotally supported on one brake pedal 6a. Each brake pedal 6a, 6b is connected by lying 61 on the other brake pedal 6b side, and these brake pedals 6a, 6b are operated simultaneously.
[0017]
Further, the pedal restricting mechanism 60 includes a restricting arm 63 pivotably supported by a pivot shaft 62 at a position in the vicinity of the speed increasing pedal 5 in the body 10, and the restricting arm 63 and the distal end portion of the connector 61. The interlocking cable 64 is stretched between the two. The interlocking cable 64 includes an inner wire 64a having one end hooked to the tip of the connector 61 and the other end hooked to the restriction arm 63, and an outer tube 64b for guiding the inner wire 64a. One end of 64b is locked to a receiver 65 fixed to the leg portion of the brake pedal 6b, and the other end is locked to a receiver 66 fixed near the pivot position of the restricting arm 63. A return spring 67 is provided between the pivot shaft 62 and the regulation arm 63 to urge the regulation arm 63 at a regular position, and a wire receiver 68 is connected to the end of the pivot shaft 62. 7 and a regulating arm 63, a fulcrum overspring 69 for selectively urging the regulating arm 63 to one side with respect to the middle position of the swinging range is interposed, and the connector 61 is connected to the pedal connecting position as shown in FIG. When it falls down, the restricting arm 63 is moved to the restricting position as shown by the solid line in FIG. 7 by the force of the return spring 67, so that the operation of the speed increasing pedal 5 can be restricted, and the connector 61 is moved to the non-connecting position (counterclockwise in FIG. When the connection between the brake pedals 6a and 6b is released, the inner wire 64a of the interlocking cable 64 is pulled against the return spring 67, and the restricting arm 63 is in the non-restricted position in FIG. Move to.
[0018]
By doing so, the brake pedals 6a and 6b are connected by the connector 61 and simultaneously operated when traveling on the road at the moving speed stage, or when loading and unloading the truck, and the left and right rear wheels 16 and 16 are operated simultaneously. When the brakes are simultaneously braked, the return spring 67 swings the restricting arm 63 to the restricting position as shown by the solid line in FIG. Therefore, when the brake pedals 6a and 6b are connected by the connector 61, the speed increase due to the intentional operation and the erroneous operation can be prevented. Further, when the connector 61 is retracted to the non-connecting position so that the brake pedals 6a and 6b can be operated independently, the inner wire 64a of the pedal restricting mechanism 60 is pulled and restricted as shown by a chain line in FIG. The arm 63 moves to the non-regulating position.
[0019]
The pedal restricting mechanism 60 is performed using the interlocking cable 64, and as shown in FIG. 9, for example, a detection switch 60a that operates when the connector 61 is operated to the coupling position, and is output from the detection switch 60a. An electromagnetic solenoid (not shown) that operates in response to the detection signal to actuate the swing arm 63 to the restricted position may be used. In this case, the restriction arm may be eliminated, and the operation of the speed increasing pedal 5 may be restricted by a rod interlocked with the electromagnetic solenoid.
[0020]
Further, in the embodiment shown in FIG. 10, when the main transmission lever 3 is operated to the “seed joint” position, the lifting device 18 is operated by operating the hydraulic cylinder 17 and is lowered to the planting position. 2 is slightly raised to a position where it becomes “neutral” by the auxiliary transmission lever 4. That is, the detection switch 20 that operates when the main transmission lever 3 is operated to the “seed joint” position, and the control signal 21 output from the detection switch 20 controls the control valve 21 of the hydraulic cylinder 17. An electromagnetic solenoid 22 for operating the spool 21a of the control valve 21 to the side where the lifting device 18 is raised is provided. Thus, when the length of the float 23 in the rice transplanter 2 is short, or when the fertilizer machine 24 is set in the rice transplanter 2, the auxiliary transmission lever 4 is moved as shown in FIG. Even if it is operated in the area A and the rice planting device 2 is lowered to the planting position and is in the planting state, it is possible to effectively prevent the float 23 from sinking and the fertilizer of the fertilizer application 24 to absorb moisture. It can be hard to wear.
[0021]
When the auxiliary transmission lever 4 is operated from the area A to the area “B” in FIG. 6B, the hydraulic cylinder 17 is used to slightly raise the elevating device 18 and then the automatic return means. The auxiliary transmission lever 4 may be automatically returned to the “neutral” position.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing a main transmission lever, speed increasing means, and regulating means taken out of a riding agricultural machine according to the present invention.
FIG. 2 is a plan view of the speed change lever portion of FIG.
3 is a side view of FIG. 1 in a state in which a speed increasing operation by the speed increasing means is restricted.
FIG. 4 is a side view showing the overall structure of the riding farm work machine.
FIG. 5 is a plan view of only the machine part of the riding agricultural machine.
FIG. 6 is an explanatory view showing a shift guide for the main shift lever and speed increasing means. FIG. 7 is a schematic explanatory view showing the brake pedal, the speed increasing pedal, and a regulating mechanism.
FIG. 8 is a bottom view of the speed increasing pedal portion of FIG. 7;
9 is an explanatory view showing another embodiment of FIG. 7;
FIG. 10 is an explanatory view showing still another embodiment.
[Explanation of symbols]
3 ... Main transmission lever 7 ... Regulating means S ... Speed increasing means

Claims (1)

移動速度段、作業速度段及び後速段を切換える主変速レバーと、操作により走行駆動系の回転を上げる増速手段とを備えた乗用農作業機において、前記主変速レバー移動速度段及び後速段の一方へ操作されたとき、前記増速手段の操作による前記走行駆動系の増速動作を規制する規制手段を備えることを特徴とする乗用農作業機。Moving speed stage, and the main shift lever for switching a working speed stage and the rear speed stage, in the riding farm machine comprising a speed increasing hand stage to increase the rotation of the travel drive system by operation, the main speed change lever moving speed stage and after when operated current gear to one, ride agricultural machine, characterized in that it comprises a regulating means to regulate the speed increasing operation of the travel drive system due to the operation of the speed increasing unit.
JP26416195A 1995-10-12 1995-10-12 Riding farm equipment Expired - Fee Related JP3656143B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26416195A JP3656143B2 (en) 1995-10-12 1995-10-12 Riding farm equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26416195A JP3656143B2 (en) 1995-10-12 1995-10-12 Riding farm equipment

Publications (2)

Publication Number Publication Date
JPH09104258A JPH09104258A (en) 1997-04-22
JP3656143B2 true JP3656143B2 (en) 2005-06-08

Family

ID=17399313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26416195A Expired - Fee Related JP3656143B2 (en) 1995-10-12 1995-10-12 Riding farm equipment

Country Status (1)

Country Link
JP (1) JP3656143B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015147109A1 (en) * 2014-03-27 2015-10-01 ヤンマー株式会社 Agricultural vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015147109A1 (en) * 2014-03-27 2015-10-01 ヤンマー株式会社 Agricultural vehicle

Also Published As

Publication number Publication date
JPH09104258A (en) 1997-04-22

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