JP4119046B2 - Checking mechanism of handle transfer management machine - Google Patents

Description

【００１８】
このような構成において、ハンドル３２を後方へ突出するように振り替えて作業者が前方を向いて作業をしないで走行する状態では、表１に示すように、前進１速Ｆ１、前進２速Ｆ２、後進１速Ｒ１、後進２速Ｒ２に変速可能である。つまり、規制ロッド５２は図５の位置となり、変速時に規制ロッド５２の先端はＰＴＯ入・切アーム５５に当接しない。
【００１９】
また、ハンドル３２を後方へ突出して作業者が前方を向いて作業をする場合は、ＰＴＯ入・切レバー１９を「入」側に回動すると、ＰＴＯ入・切アーム５５は図４、図５に示すように、後方へ回動され、主変速レバー３３は前進１速Ｆ１、前進２速Ｆ２には変速可能であるが、後進１速Ｒ１、または、後進２速Ｒ２に変速しようと主変速レバー３３を右側（Ｒ側）へ回動しても、規制ロッド５２先端がＰＴＯ入・切アーム５５に当たり、変速できないのである。つまり、ハンドル３２を後方へ振り替えた状態では、作業者は前を向いて前進しながら作業はできるが、後進しながら作業はできないように規制しているのである。
【００２０】
次に、ハンドル３２を前方へ振り替えた場合について説明する。図４、図６に示すように、ハンドル３２の前方への回動とともに、カム４７も回動され前方に偏心した状態となっており（大径部４７ｄが回動中心Ｏより前方に位置し）、ＰＴＯ入・切アーム５５が「入」位置（または「切」位置）にあるとき、規制ロッド５２先端は図４の如くラップしておらず、主変速レバー３３は後進１速Ｒ１、または、後進２速Ｒ２に変速することができる。つまり、ハンドル３２を前方へ振り替えた状態では、作業者は後向きとなり、後進１速Ｒ１、または、後進２速Ｒ２は機体前後方向に対しては後ろ向きで後進、つまり，作業者にとっては通常の前進歩行することとなり、作業の入り切りにかかわらず安全に走行・作業ができるのである。
【００２１】
また、畦立てやマルチフィルムの敷設作業等においては、ハンドル３２を前方へ振り替えた状態で作業を行うが、このとき作業者は機体に対して後ろ向きで前進するため、前進１速Ｆ１の時は後ずさりしながら作業することとなる。しかし、前進２速２Ｆのときは高速前進となるため、作業や走行はやり難く安全上問題が生じる。そこで本発明では、ハンドル３２を前方へ振り替えた状態では前進２速２Ｆに変速できないようにしている。
【００２２】
つまり、ハンドル３２を前方へ振り替えると、カム４７も同時に回動されて、カム４７の大径部４７ｄが前方に位置し、規制ピン４６の先端が当接して前進２速２Ｆに変速できないようにしているのである。詳述すると、図４、図６に示すように、前進１速Ｆ１の時、規制ピン４６の先端はカム面４７ｂにして変速が可能であり、低速前進が可能である。しかし、前進２速２Ｆに変速するために、主変速レバー３３を中立位置で上方へ回動して右側へ回動しようとすると、規制ピン４６の先端が大径部４７ｄにおけるカム面４７ａに当接して、前進２速２Ｆに変速することはできないのである。具体的には、大径部４７ｄが前側に位置した図４の状態で、前進２速２Ｆに変速すると規制ピン４６は図３の位置となるが、大径部４７ｄが位置しているのでカム面４７ａに当たり変速はできないのである。
【００２３】
また、ハンドル３２を後方へ振り替えた状態で、前進２速Ｆ２に変速すると、図３における規制ピン４６の先端はカム面４７ａの高さの位置で図５のＦ位置となり、規制ピン４６と大径部４７ｄは当接せず、変速は可能となっている。そして、この変速状態でメインクラッチを切った状態で、ハンドル３２を回動して前方へ振り替えると、カム４７も同時に回動して、大径部４７ｄが前方へ回動して、カム面４７ａが規制ピン４６に当接して右方へ押し、主変速レバー３３は中立位置Ｎに戻されるのである。従って、前進２速Ｆ２に変速した状態で、ハンドル３２を前方へ振り替えて、主変速レバー３３を中立側へ戻すことを忘れて、主クラッチレバーを「入」としても、自動的に主変速レバー３３は中立位置に戻されているので、急に、前進することがないのである。
【００２４】
また、ハンドル３２を前方へ振り替えた状態で、後進１速Ｒ１、または、後進２速Ｒ２に変速すると、図６における規制ロッド５２の先端はＲ位置となり、規制ピン４６も大径部４７ｄに当接せず、変速は可能となる。そして、この変速状態でメインクラッチを切った状態で、ハンドル３２を回動して後方へ振り替えると、カム４７も同時に回動して、大径部４７ｄが後方へ回動して、カム面４７ｂが規制ロッド５２の当接片５２ａを後方へ押す、そして同時に、規制ロッド５２の先端が後方へ移動するときにＰＴＯ入・切アーム５５の上端に当接しながら移動する。このとき規制ロッド５２は左方へ押され、主変速レバー３３は中立位置Ｎに戻されるのである。従って、後進１速Ｒ１、または、後進２速Ｒ２に変速した状態で、ハンドル３２を後方へ振り替えて、主変速レバー３３を中立側へ戻すことを忘れて、主クラッチレバーを「入」としても、自動的に主変速レバー３３は中立位置に戻されているので、急に、後進することがないのである。ただし、本実施例では、規制ピン４６を前側、規制ロッド５２を後側に配置しているが、前後逆に、または左右方向に配置することも可能である。
【００２５】
【発明の効果】
本発明は以上の如く構成したので、以下の効果を奏するものである。
請求項１の如く、ハンドル（３２）を機体進行方向の前後に振り替え可能とし、ハンドル（３２）を前方側に振り替えて、機体が前進走行するのに対して、作業者が後向きに歩行する状態において、前進側の走行速度を牽制する管理機（１）において、該ハンドル（３２）の回動基部にカム（４７）を設け、主変速レバー（３３）の回動基部より規制ピン（４６）を前記カム（４７）側へ突出し、該ハンドル（３２）を前方へ振り替えて、主変速レバー（３３）を高速前進速位置に変速しようとすると、前記規制ピン（４６）がカム（４７）に当接して変速できないようにし、更に、該主変速レバー（３３）が高速前進速位置で、該ハンドル（３２）を前方へ振り替えたときに、該カム（４７）が規制ピン（４６）を押して主変速レバー（３３）を中立に戻すように構成したので、作業者が機体に対して後向きで高速前進することがなくなり、作業者が転倒したりすることがなく、安心して作業や走行を行うことができる。
【００２６】
また、ハンドルを前後振り替え可能とし、作業者が機体に対し後向き前進時の走行を牽制する管理機において、ハンドルの回動基部にカムを設け、主変速レバーの回動基部より規制部材を前記カム側へ突出し、主変速レバーが高速前進速位置で、ハンドルを前方へ振り替えたときに、カムが規制部材を押して主変速レバーを中立に戻すようにしたので、主変速レバーを前進高速位置に変速したままハンドルを前側へ回動しても、必ず、中立に戻されるので、誤って主クラッチを「入」としても、高速前進することがない。また、中立に戻す手間も省くことができ、操作性を向上できる。
【００２７】
また、前記主変速レバー（３３）より、該ハンドル（３２）を進行方向の後側へ振り替えた状態で、後進作業を規制する規制ロッド（５２）を設け、該規制ロッド（５２）をＰＴＯ入・切アーム（５５）の近傍へ突出し、該規制ロッド（５２）に前記カム（４７）が接当すべく構成し、該ハンドル（３２）を後方へ振り替えると、前記カム（４７）が規制ロッド（５２）を押して、ＰＴＯ入・切アーム（５５）と係合し、該主変速レバー（３３）が後進位置で、作業を不可能としたので、両方の規制部材が主変速レバーの回動基部に集中して配置することができ、メンテナンス等がやり易くなり、コンパクトに配置構成できる。また、カムも両方の規制に利用でき、部品点数が少なく、コスト低減化も図れる。
【００２８】
請求項２の如く、請求項１記載のハンドル振り替え管理機の牽制機構において、前記ハンドル（３２）を前側へ振り替えた際に、作業者が後向きの高速前進を規制する規制ピン（４６）の取付部と、該ハンドル（３２）を後側へ振り替えて後進作業を規制する規制ロッド（５２）の取付部を、前記主変速レバー（３３）の基部に対して互いに反対方向に配置したので、両方の規制部材が干渉することがなく、確実に規制できる。
また、互いに独立して作用させることもでき、効率よく配置できる。
【図面の簡単な説明】
【図１】 本発明の管理機の左側面図である。
【図２】 同じく右側面図である。
【図３】 主変速レバー基部の側面図である。
【図４】 同じく主変速レバーを前側へ向けた状態の側面図である。
【図５】 ハンドルを後側に振り替えた状態のハンドル基部の平面図である。
【図６】 同じくハンドルを前側に振り替えた平面図である。
【図７】 シフトガイドプレートの平面図である。
【図８】 ハンドルベースの右側面図である。
【符号の説明】
１ 管理機
３２ ハンドル
３３ 主変速レバー
４６ 規制ピン（規制部材）
４７ カム[0001]
BACKGROUND OF THE INVENTION
The present invention is a means for restraining the operator from working backward while turning the handle forward and a means for restraining the worker from facing forward and moving the handle backward and moving backward. It relates to the configuration of the management machine provided.
[0002]
[Prior art]
Conventionally, the handle can be changed back and forth, and the work can be performed while the handle is directed forward and the work moves forward, or the handle is transferred forward and the work can be performed while the worker moves forward or backwards. I was able to do it.
[0003]
[Problems to be solved by the invention]
However, when the worker moves backward while facing forward, the traveling direction is easy to bend and the work is difficult to perform, and the worker may hit the work machine. Further, when the worker moves forward at high speed while facing backward, the worker is likely to fall down and is difficult to drive.
[0004]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
[0005]
According to claim 1, the handle (32) can be changed back and forth in the aircraft traveling direction, and the handle (32) is changed forward to move the aircraft forward while the operator walks backward. In the management machine (1) that controls the traveling speed on the forward side, a cam (47) is provided on the rotating base of the handle (32), and the restricting pin (46) from the rotating base of the main transmission lever (33). When the main transmission lever (33) is shifted to the high speed forward speed position by shifting the handle (32) forward, the restriction pin (46) is moved to the cam (47). When the main transmission lever (33) is at the high forward speed position and the handle (32) is turned forward, the cam (47) pushes the restriction pin (46). Main transmission lever 33) is configured to return to neutral, and a regulation rod (52) is provided for regulating the backward operation in a state where the handle (32) is transferred from the main transmission lever (33) to the rear side in the traveling direction, When the restricting rod (52) protrudes in the vicinity of the PTO on / off arm (55), the cam (47) comes into contact with the restricting rod (52), and the handle (32) is rearwardly moved. The cam (47) pushes the regulating rod (52) to engage with the PTO on / off arm (55), and the main speed change lever (33) is in the reverse position to make the operation impossible .
[0006]
According to claim 2, in the check mechanism of the handle change management machine according to claim 1, when the handle (32) is changed to the front side, the attachment of the restriction pin (46) for restricting the high-speed forward movement of the operator backward. And a mounting portion of a restriction rod (52) for restricting the reverse operation by transferring the handle (32) to the rear side, are arranged in opposite directions with respect to the base portion of the main transmission lever (33). .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a left side view of the management machine according to the present invention, FIG. 2 is a right side view of the same, FIG. 3 is a side view of a main shift lever base, and FIG. 4 is a side view of the main shift lever facing forward. 5 is a plan view of the handle base in a state where the handle is transferred to the rear side, FIG. 6 is a plan view of the handle similarly transferred to the front side, FIG. 7 is a plan view of the shift guide plate, and FIG. 8 is a right side view of the handle base. is there.
[0008]
If it demonstrates from the whole structure of the management machine 1 from FIG. 1, FIG. 2, the F direction is demonstrated as a body front. In the management machine 1, the engine 2 is mounted on a front engine frame 20, and a fuel tank 21 is placed on the upper part of the engine 2. The engine frame 20 protrudes forward from the transmission case 3, and pulleys are fixed to the input shaft of the transmission case 3 and the output shaft of the engine 2 to transmit power via a belt. In this manner, the belt, the pulley and the like are covered with a transmission case 22. A chain case projects from the front and lower side of the transmission case 3, and an axle 24 is pivotally supported at the lower end of the chain case, and wheels 25 are fixed to the axle 24 so that the vehicle can be driven.
[0009]
Further, a rotary drive pipe 23 protrudes rearward and downward from the transmission case 3, a tilling claw shaft 26 is pivotally supported at the lower end of the rotary drive pipe 23, and a plurality of pieces are arranged on the axis of the tilling claw shaft 26. Tillage claws 30.30 ... are planted. The upper and lateral sides of the tip of the tilling claws 30, 30... Are covered with a tilling cover 38, and the tilling cover 38 is attached to a rotary frame 27 protruding rearward from the transmission case 3. The tillage cover 38 is pivoted upward so that it can be spread and fixed so that the tilled soil can be blown sideways. An attachment fixing boss 29 is fixed to the rear end portion of the rotary frame 27 and a gauge ring 28 is attached to constitute the rotary tiller 4.
[0010]
A handle base 31 is provided on the upper part of the transmission case 3, and a base 32a of a handle 32 is mounted on the handle base 31 so as to be rotatable about a vertical axis. 32 protrudes so that the vertical angle can be adjusted. Reference numeral 34 denotes a lock screw for fixing the handle 32 at a position shifted to the front or rear. A PTO on / off lever 19 is provided in the middle of the handle 32, and the PTO on / off lever 19 is connected to a PTO on / off arm 55 described later via a wire 17. Is connected to a PTO clutch which is a PTO on / off means in the mission case 3. Further, a main clutch lever, a side clutch lever, an accelerator lever and the like (not shown) are arranged at the rear portion of the handle 32.
[0011]
In the vicinity of the left side of the handle base 31, a main transmission lever 33 protrudes so as to be able to change back and forth, and is usually attached so as to protrude in the same direction according to the direction of the handle. In the vicinity of the right side of the handle base 31, the PTO on / off arm 55 and the PTO speed change lever 12 are arranged. As shown in FIGS. 3 to 6, the base portion of the main transmission lever 33 is attached to the boss 42 so as to be able to change back and forth, and the boss 42 protrudes from the side surface of the handle base 31 in the left horizontal direction toward the traveling direction. The pivot shaft 41 is pivotally supported so as to be able to rotate back and forth. A support plate 43 is fixed above and below the boss 42, and a rear end of the support plate 43 is engaged with an engagement body 45 fixed to the speed change fork shaft 44. Then, the sliding body in the transmission case 3 is slid to change the meshing position of the gear so that the gear can be changed.
[0012]
Further, one end of a restriction pin 46 serving as a restriction member is fixed on one side of the support plate 43 (the front part in the present embodiment), and the other end of the restriction pin 46 protrudes toward the handle base 32a side. It arrange | positions so that contact | abutting to the cam 47 mentioned later is possible. On the other side (rear end) of the support plate 43, an instruction pin 50 protrudes upward, and the tip of the instruction pin 50 has a lever guide groove 51a provided in a shift guide plate 51 fixed on the left side of the handle base 31. Has been inserted. The shift guide plate 51 is also provided with an insertion hole 51b for inserting the base portion of the main transmission lever 33.
[0013]
As shown in FIG. 7, the lever guide groove 51a is formed in an H shape, and the first forward speed F1 (low speed forward), the second forward speed F2 (high speed forward), the reverse first speed R1 (low speed reverse), and the reverse second speed. R2 (high speed reverse) and a neutral N position are provided, and the main shift lever 33 is turned to allow four speeds to be changed so that each shift stage can be easily recognized by the position of the instruction pin 50. ing. However, it is also possible to configure four or more shift stages.
[0014]
Then, an engaging pin 50a protrudes from a middle portion of the instruction pin 50 arranged at the base of the main transmission lever 33 (FIG. 3), and the engaging pin 50a is one end of a regulating rod 52 serving as a regulating member. Is inserted into and engaged with the insertion hole of the connecting plate 53 fixed to. The restriction rod 52 passes through the vicinity of the rotation base 32a of the handle 32 and extends to the vicinity of the PTO on / off arm 55. The restriction rod 52 is inserted into an insertion hole and a guide hole 31a provided on the side surface of the handle base 31. An abutting piece 52a configured in an arc shape is fixed to the right and left middle part of the restriction rod 52 (FIG. 5), and a spring 54 is provided on the other side of the restriction rod 52. The contact piece 52a is urged so as to contact the cam 47 by being locked.
[0015]
The other end (right end) of the restriction rod 52 protrudes to the right from the handle base 31, and its tip extends to a position where it can contact the tip of the PTO on / off arm 55. The front end (upper end) of the PTO on / off arm 55 is formed in a “h” shape in plan view so that the front end of the regulating rod 52 can slide and be guided. The base of the PTO on / off arm 55 is fixed to a PTO on / off shaft 56 connected to a PTO on / off means such as a PTO clutch, and the PTO on / off shaft 56 is horizontally mounted on the mission case 3. Yes. Further, as shown in FIG. 8, the wire 17 is connected to the middle portion of the PTO on / off arm 55 and is connected to the PTO on / off lever 19 provided on the handle 32.
[0016]
The cam 47 is fixed to the base 32 a of the handle 32, is rotatably supported by the handle base 31, and is rotated together with the handle 32. The cam 47 has cam surfaces 47a and 47b formed in the lower part, the cam surfaces 47a and 47b are formed in a substantially elliptical shape similar to each other in a plan view, and are stepped in a side view. Are arranged eccentrically, and a large-diameter portion 47d and a small-diameter portion 47e are formed with respect to the rotation center O of the handle 32. Further, stoppers 47c and 47c are formed on a part of the outer periphery of the side surface of the cam 47 so that the handle 32 can be pivoted back and forth only from one side direction.
[0017]
[Table 1]

[0018]
In such a configuration, in a state in which the handle 32 is shifted so as to protrude rearward and the operator travels without facing the front, as shown in Table 1, forward first speed F1, forward second speed F2, The speed can be changed to the first reverse speed R1 and the second reverse speed R2. That is, the restriction rod 52 is in the position shown in FIG. 5, and the tip of the restriction rod 52 does not contact the PTO on / off arm 55 at the time of shifting.
[0019]
When the handle 32 is protruded rearward and the operator works while facing the front, when the PTO on / off lever 19 is turned to the “on” side, the PTO on / off arm 55 is moved to FIGS. 4 and 5. As shown in FIG. 4, the main speed change lever 33 can be shifted to the first forward speed F1 and the second forward speed F2, but the main speed change lever 33 is intended to shift to the first reverse speed R1 or the reverse second speed R2. Even if the lever 33 is rotated to the right (R side), the tip of the regulating rod 52 hits the PTO on / off arm 55, and the speed cannot be changed. In other words, in a state where the handle 32 is rearwardly transferred, the operator can work while moving forward while moving forward, but is restricted so that work cannot be performed while moving backward.
[0020]
Next, a case where the handle 32 is transferred forward will be described. As shown in FIGS. 4 and 6, as the handle 32 is rotated forward, the cam 47 is also rotated and eccentrically moved forward (the large-diameter portion 47d is positioned forward from the rotation center O). ) When the PTO on / off arm 55 is in the “on” position (or “off” position), the tip of the regulating rod 52 is not wrapped as shown in FIG. The speed can be changed to the reverse second speed R2. In other words, in the state where the handle 32 is changed forward, the operator turns backward, and the first reverse speed R1 or the reverse second speed R2 moves backward with respect to the longitudinal direction of the machine body, that is, the forward movement is normal for the worker. You will be walking, and you can safely run and work regardless of whether you work.
[0021]
In addition, in the uprighting, multi-film laying work, etc., the work is performed with the handle 32 being transferred to the front. At this time, since the operator moves forward with respect to the aircraft, You will be working backwards. However, since the second forward speed 2F is a high speed forward movement, it is difficult to work and travel, causing a safety problem. Therefore, in the present invention, the shift to the forward second speed 2F cannot be performed when the handle 32 is changed forward.
[0022]
In other words, when the handle 32 is shifted forward, the cam 47 is also rotated at the same time so that the large-diameter portion 47d of the cam 47 is positioned forward and the tip of the regulation pin 46 comes into contact so that shifting to the forward second speed 2F cannot be performed. -ing More specifically, as shown in FIG. 4 and FIG. 6, at the first forward speed F1, the tip of the regulation pin 46 can be shifted with the cam surface 47b, so that low speed advance is possible. However, if the main transmission lever 33 is rotated upward at the neutral position to rotate rightward in order to shift to the forward second speed 2F, the tip of the regulation pin 46 contacts the cam surface 47a in the large diameter portion 47d. In contact, it is not possible to shift to the forward second speed 2F. Specifically, in the state of FIG. 4 in which the large-diameter portion 47d is located on the front side, when shifting to the second forward speed 2F, the restriction pin 46 is in the position of FIG. 3, but the large-diameter portion 47d is located so that the cam It is impossible to change the speed by hitting the surface 47a.
[0023]
Further, when shifting to the forward second speed F2 with the handle 32 being rearwardly transferred, the tip of the restriction pin 46 in FIG. 3 is at the position F in FIG. 5 at the height of the cam surface 47a, which is larger than the restriction pin 46. The diameter portion 47d does not come into contact, and the gear can be changed. When the main clutch is disengaged in this speed change state and the handle 32 is rotated and shifted forward, the cam 47 also rotates simultaneously, and the large-diameter portion 47d rotates forward, and the cam surface 47a. Is brought into contact with the regulating pin 46 and pushed rightward, so that the main transmission lever 33 is returned to the neutral position N. Therefore, even if the main shift lever 33 is forgotten to change the handle 32 to the front and return the main shift lever 33 to the neutral side in the state of shifting to the forward second speed F2, the main shift lever is automatically turned on. Since 33 is returned to the neutral position, it does not move forward suddenly.
[0024]
Further, when shifting to the first reverse speed R1 or the second reverse speed R2 with the handle 32 being shifted forward, the tip of the restriction rod 52 in FIG. 6 is in the R position, and the restriction pin 46 also contacts the large-diameter portion 47d. Shifting is possible without touching. Then, with the main clutch disengaged in this speed change state, when the handle 32 is rotated and shifted backward, the cam 47 also rotates simultaneously, and the large-diameter portion 47d rotates rearward, and the cam surface 47b. Pushes the contact piece 52a of the restriction rod 52 backward, and at the same time, the tip of the restriction rod 52 moves while contacting the upper end of the PTO on / off arm 55 when moving forward. At this time, the restriction rod 52 is pushed leftward, and the main transmission lever 33 is returned to the neutral position N. Therefore, in the state of shifting to the first reverse speed R1 or the second reverse speed R2, forgetting to change the handle 32 rearward and returning the main transmission lever 33 to the neutral side, the main clutch lever can be set to “ON”. Since the main transmission lever 33 is automatically returned to the neutral position, it does not suddenly reverse. However, in the present embodiment, the restriction pin 46 is arranged on the front side and the restriction rod 52 is arranged on the rear side, but it is also possible to arrange them in the reverse direction or in the left-right direction.
[0025]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
As in claim 1, the handle (32) can be changed back and forth in the aircraft traveling direction, and the handle (32) is changed forward to move the aircraft forward while the operator walks backward. In the management machine (1) that controls the traveling speed on the forward side, a cam (47) is provided on the rotating base of the handle (32), and the restricting pin (46) from the rotating base of the main transmission lever (33). When the main transmission lever (33) is shifted to the high speed forward speed position by shifting the handle (32) forward, the restriction pin (46) is moved to the cam (47). When the main transmission lever (33) is at the high forward speed position and the handle (32) is turned forward, the cam (47) pushes the restriction pin (46). Main transmission lever (3 ) And since it is configured to return to the neutral, it is not that the operator to fast forward in a rear-facing to the aircraft, without operator or fall, it is possible to perform the work and travel with confidence.
[0026]
Further, in a management machine in which the handle can be changed back and forth, and the operator checks the traveling when the vehicle moves forward backward, a cam is provided on the rotating base of the handle, and the restricting member is attached to the cam from the rotating base of the main transmission lever. When the main shift lever is in the high forward speed position and the handle is shifted forward, the cam pushes the regulating member to return the main shift lever to the neutral position, so the main shift lever is shifted to the forward high speed position. Even if the handle is rotated to the front side in this state, it is always returned to neutral, so even if the main clutch is erroneously “engaged”, it does not move forward at high speed. Further, it is possible to save the trouble of returning to neutrality, and operability can be improved.
[0027]
Further, a restriction rod (52) for restricting the backward operation is provided in a state where the handle (32) is transferred to the rear side in the traveling direction from the main transmission lever (33), and the restriction rod (52) is inserted into the PTO. -It protrudes to the vicinity of the cutting arm (55), the cam (47) is configured to contact the regulating rod (52), and when the handle (32) is rearwardly moved, the cam (47) is moved to the regulating rod. (52) is pressed to engage the PTO on / off arm (55) and the main speed change lever (33) is in the reverse position, making it impossible to work. It can be arranged concentrated on the base, and maintenance and the like can be easily performed, and the arrangement can be made compact. In addition, the cam can be used for both regulations, and the number of parts is small, and the cost can be reduced.
[0028]
As in claim 2, in the check mechanism of the handle change management machine according to claim 1, when the handle (32) is changed to the front side, the restriction pin (46) is attached to restrict the operator from moving forward at a high speed. And the mounting portion of the restriction rod (52) for restricting the reverse operation by transferring the handle (32) to the rear side are arranged in opposite directions with respect to the base of the main transmission lever (33). The regulating member can be reliably regulated without interference.
Moreover, it can also be made to act mutually independently and can arrange | position efficiently.
[Brief description of the drawings]
FIG. 1 is a left side view of a management machine according to the present invention.
FIG. 2 is a right side view of the same.
FIG. 3 is a side view of a main transmission lever base.
FIG. 4 is a side view of the main transmission lever that is directed forward.
FIG. 5 is a plan view of the handle base in a state where the handle is changed to the rear side.
FIG. 6 is a plan view in which the handle is also changed to the front side.
FIG. 7 is a plan view of a shift guide plate.
FIG. 8 is a right side view of the handle base.
[Explanation of symbols]
1 Control Machine 32 Handle 33 Main Shift Lever 46 Restriction Pin (Restriction Member)
47 Cam

Claims (2)

The handle (32) can be changed back and forth in the aircraft traveling direction, and the handle (32) is changed forward and the aircraft moves forward, while the operator walks backward while the operator walks backward. In the management machine (1) for controlling the speed, a cam (47) is provided at the rotating base of the handle (32), and the regulating pin (46) is moved from the rotating base of the main transmission lever (33) to the cam (47). When the main shift lever (33) is shifted to the high speed forward speed position by shifting the handle (32) forward, the restriction pin (46) abuts against the cam (47) so that shifting cannot be performed. In addition, when the main transmission lever (33) is at the high forward speed position and the handle (32) is transferred forward, the cam (47) pushes the restriction pin (46) and the main transmission lever (33). Return to neutral In the state where the handle (32) is transferred to the rear side in the traveling direction from the main transmission lever (33), a regulating rod (52) for regulating the reverse operation is provided, and the regulating rod (52) is When the cam (47) protrudes in the vicinity of the PTO on / off arm (55), the cam (47) contacts the regulating rod (52), and the handle (32) is rearwardly moved, the cam (47) Checking of the steering wheel change management machine characterized in that the control rod (52) is pushed to engage with the PTO on / off arm (55), and the main speed change lever (33) is in the reverse position and the work is impossible. mechanism. The check mechanism of the handle change management machine according to claim 1, wherein when the handle (32) is changed to the front side, an attachment portion of a restriction pin (46) for restricting a high-speed forward movement by the operator, and the handle ( 32) A steering wheel change management machine characterized in that the attachment portion of the restriction rod (52) for changing the rearward movement to restrict the reverse operation is arranged in the opposite direction with respect to the base portion of the main transmission lever (33). Check mechanism.

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