JPH0551945A - Operating device for service vehicle - Google Patents

Abstract

PURPOSE:To improve safety by locking an operating device automatically at a neutral position, when an operating tower having the work device operating device is tilted into a rear side getting on/off posture from a using posture projected to a front side getting on/off passage. CONSTITUTION:An operating tower 15 having the operating lever 13 of a work device is supported to be tilted forward and backward at an axial core P. After that, the tower 15 is freely switched to a using posture tilted to a front side getting on/off passage S for getting on/off a driving seat, and a getting on/off posture tilted to a rear side. After that, at the lower end boss section 27 of the lever 13 positioned at a neutral position, a locking member 20 to be moved forward and backward is vertically slidably set. Besides, an L type cam 32 to be engaged with the lower end of the lock 20 is pivotally fitted on the tower 15, and with a tensile spring 36, the lock 20 is energized in the low direction. When the tower 15 is tilted to the getting on/off posture side, then the cam 32 is brought in contact with a roller 34 set on the bearing and fixing section of the tower 15 via a bracket 35, and the lock 20 is engaged with the boss 27, and the lever 13 is locked. As a result, neutral operation can be prevented from being forgot, and the device can be prevented from being driven not to be forecast.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、バックホウ、ホイール
ローダあるいはコンバインといった作業車に係り、詳し
くは、運転座席の横側位置に設けた操作具を、その座席
に対する乗降用の通路に張り出た操縦姿勢と、通路から
退避した乗降姿勢とに移動可能に構成してある作業車の
操作装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle such as a backhoe, a wheel loader, or a combine, and more specifically, an operation tool provided at a side position of a driver's seat is extended to a passage for getting on and off the seat. The present invention relates to an operating device for a work vehicle that is configured to be movable between a steering posture and an on-and-off posture retracted from a passage.

【０００２】[0002]

【従来の技術】この種の作業車としては、実開平２−６
６８６１号公報に示されるもののように、掘削作業装置
の操作レバーを頂部に備えた操縦塔を、前倒しして乗降
用通路に張り出た使用姿勢と、後方側に倒して起立させ
た乗降姿勢とが現出できるようにして、作業中における
操縦者の不測の機外落下の牽制が図れ、かつ、乗降用通
路の拡大による良好な乗降性を得る技術が知られてい
る。2. Description of the Related Art As a work vehicle of this type, an actual Kaihei 2-6
As shown in Japanese Patent No. 6861, a control tower equipped with an operation lever of an excavation work device at the top is used in a forward posture and overhangs in a passageway, and in a rearward posture when the steering tower is in a standing posture. It is known that a driver can control the accidental fall of the aircraft during work and that the passenger can get on and off by expanding the passage for getting on and off.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、エンジ
ンが回っている状態のときに操縦塔を乗降姿勢にして乗
り降りする際に、肘で引っ掛ける等して誤って操作レバ
ーを動かしてしまうと、作業装置が不意に駆動される安
全上好ましくない現象の生じるおそれがあり、改善の余
地があった。本発明は、操縦塔を乗降姿勢にしたときに
は作業装置が駆動されないようにして安全性を高めるこ
とを目的とする。However, when the operator operates the operating tower with the elbow or the like to accidentally move the operation lever when the engine is running, the operator can get on and off the control tower. There is a possibility that an unfavorable safety phenomenon may occur in which the product is driven unexpectedly, and there was room for improvement. An object of the present invention is to improve safety by preventing the work device from being driven when the control tower is placed in a boarding / alighting posture.

【０００４】[0004]

【課題を解決するための手段】上記目的の達成のために
本発明は、上部に作業装置の操作具を備えた操縦塔を、
操縦塔がこれの前方に位置する乗降用通路へ張り出た使
用姿勢と、操縦塔が乗降用通路から後方に退避した乗降
姿勢とを現出するべく前後移動可能に運転座席の横側位
置に備えてある作業車の操作装置において、操縦塔が使
用姿勢から乗降姿勢に移動されるに従って、自動的に操
作具をロック部材によって中立位置に係止維持させる自
動ロック機構を設けてあることを特徴とする。In order to achieve the above-mentioned object, the present invention provides a control tower having an operating tool for a working device at its upper part,
It is possible to move forward and backward in order to show the use posture in which the control tower overhangs the entry / exit passage located in front of it, and the entry / exit posture in which the control tower retracts rearward from the entry / exit passage. The operating device of the work vehicle provided is provided with an automatic lock mechanism for automatically locking and maintaining the operation tool at the neutral position by the lock member as the control tower is moved from the use posture to the getting on / off posture. And

【０００５】[0005]

【作用】上記特徴構成によれば、自動ロック機構の働き
により、操縦塔を乗降姿勢に移動操作するとロック部材
によって操作具が自動的に中立位置にロックされるよう
になる。故に、乗降時に誤って操作具を引っ掛けても操
作具は中立位置を維持し、不測の作業装置駆動が起きな
いようになる。例えば、操作具を中立にロックする別レ
バーを設け、操縦塔を乗降姿勢に操作すると警報が鳴る
とか警告ランプが点灯する等して別レバーの操作を促す
注意喚起を行う手段に比べて、本発明の手段では中立操
作し忘れることがなく確実である。According to the above-mentioned characteristic structure, the operation of the automatic lock mechanism allows the operating member to be automatically locked at the neutral position by the lock member when the operation operation of moving the control tower to the getting on / off posture is performed. Therefore, even if the operating tool is accidentally hooked at the time of getting on and off, the operating tool maintains the neutral position, and unexpected driving of the working device does not occur. For example, compared to a means that calls for caution to urge the operation of another lever by providing another lever that locks the operation tool neutrally and sounding an alarm or turning on a warning lamp when operating the control tower in the boarding / alighting posture. The means of the invention ensures that the neutral operation is not forgotten.

【０００６】[0006]

【発明の効果】従って、ロック部材が操作具を中立位置
にロックすることを、操縦塔の移動構造を利用して自動
的に遂行されるように工夫したので、乗降姿勢時におけ
る操作具ロックが確実に行え、乗降時の不測の作業装置
駆動を防止する機能を信頼性の高い状態で提供できた。Therefore, since the lock member is designed to automatically lock the operating tool at the neutral position by utilizing the moving structure of the control tower, the operating tool is locked when the operator gets on and off. It was possible to provide a function that can be reliably performed and that prevents unexpected driving of the working device when getting on and off in a highly reliable state.

【０００７】[0007]

【実施例】以下に、本発明の実施例を図面に基づいて説
明する。以下に、本発明の実施例を作業車の一例である
バックホウに適用した場合について図面に基づいて説明
する。図６に本発明によるバックホウを示している。こ
のバックホウは、走行機台Ｆ上に縦軸心周りで全旋回自
在に旋回台１を搭載するとともに、この旋回台１に掘削
作業装置２を取付け、上部に運転部３を配設してある。
掘削作業装置２はスイングブラケット４を介して格納揺
動自在に取付けられ、３個の油圧シリンダ５，６，７に
より各別に揺動駆動されるブーム８、アーム９および、
バケット１０から成り、この掘削作業装置２および旋回
台１の駆動操作は、運転座席１１の両横位置に十字操作
式の操作レバー１２，１３を配設し、各シリンダ５，
６，７及び図示しない旋回台駆動用油圧モータの図示し
ない制御弁に連動連結される操作ワイヤ１４の***作部
１４ａを、前記操作レバー１２，１３で押し引きする機
械式の操作システムに構成してある。尚、操作レバー１
２，１３は、その非操作時には図示しない復元バネによ
って直立した中立位置に戻るようにされている。同図に
示すように、左側の操作レバー１３を頂部に備えた操縦
塔１５をその下部の左右軸心Ｐでの前後揺動により、運
転座席１１に対して乗り降りするための乗降用通路Ｓ側
（前方）に寄った使用姿勢（仮想線の状態）と後方へ寄
った乗降姿勢（実線の状態）とに切換自在である。つま
り、乗降時には操縦塔１５を乗降姿勢にし、座席１１に
着座しての作業装置２操縦時には操縦塔１５を前に倒し
て操縦し易い位置にするのである。前記操縦塔１５は、
その後部位置に配設された左右軸心Ｚで支持される単一
の移動レバー１６の前後揺動操作によって操縦姿勢と乗
降姿勢とに姿勢変更及び維持できるように構成されてい
る。Embodiments of the present invention will be described below with reference to the drawings. Hereinafter, a case where the embodiment of the present invention is applied to a backhoe which is an example of a work vehicle will be described with reference to the drawings. FIG. 6 shows a backhoe according to the present invention. In this backhoe, a swivel base 1 is mounted on a traveling machine base F so as to be fully swivel about a vertical axis center, an excavation work device 2 is attached to the swivel base 1, and an operating section 3 is arranged on the upper part. ..
The excavation work device 2 is mounted via a swing bracket 4 so as to be retractable and swingable, and a boom 8, an arm 9, and a boom 8 that are swingably driven by three hydraulic cylinders 5, 6, and 7, respectively.
A driving operation of the excavation work device 2 and the swivel base 1 is made up of a bucket 10, and cross operation type operation levers 12 and 13 are arranged at both lateral positions of a driver's seat 11, and each cylinder 5 is operated.
6, 7 and the operated portion 14a of the operation wire 14 which is linked to a control valve (not shown) of the hydraulic motor for driving the swivel base, which is not shown, is configured as a mechanical operation system in which the operation levers 12 and 13 push and pull. There is. The operating lever 1
When not operated, the return springs 2 and 13 are returned to the upright neutral position by a restoring spring (not shown). As shown in the figure, the control tower 15 provided with the left operation lever 13 at the top is swung back and forth about the left and right axis P of the lower part of the control tower 15 to get on and off the driver's seat 11 on the passage S side for getting on and off. It is possible to switch between the use posture (state of phantom line) approaching (front) and the getting on / off posture (state of solid line) approaching rearward. That is, the control tower 15 is set in the loading / unloading posture when the passenger gets on and off, and when the working device 2 is seated on the seat 11, the control tower 15 is tilted forward to be in a position where it is easy to control. The control tower 15 is
It is configured such that the posture can be changed and maintained between a steering posture and a boarding / alighting posture by a forward / backward swinging operation of a single moving lever 16 supported by a left-right axis Z arranged at a rear position.

【０００８】図３、図４に示すように、操縦塔１５の下
部に係止板１７を取付けるとともに、後方に張り出た操
縦塔１５下部のブラケット１５ａに左右軸心Ｘ周りに回
動自在にリンク１８を取付けてあり、リンク１８の軸心
Ｘ付近に取付けた押圧棒１８ａをロック板１７に枢支し
たリターンバネ１９で前方へ引っ張ることで、該リンク
１８を図中時計周り方向に付勢し、かつ、移動レバー１
６に連動するロッド２１の対リンク枢支点１８ｂと操縦
塔１５の揺動軸心Ｐとが一致する位置にリンク１８が係
止するように、リンク１８とブラケット１５ａとを接当
してある。前記ロッド２１は移動レバー１６下部１６Ａ
のピン１６ａに長孔２１ａで連結され、ピン１６ａが長
孔２１ａの図中右端に位置するようにばね２２で相対付
勢してある。前記係止板１７は軸心Ｐを中心とする円弧
面１７ａ上に４箇所の切欠き２３が形成してあり、これ
ら切欠き２３に係合可能な爪部２４ａを形成した係止片
２４を、操縦塔１５の取付部２５に上下軸心Ｙ周りで回
動自在に、かつ、爪部２４ａが切欠き２３に接近移動す
る方向にばね付勢される状態に枢支してあり、係止片２
４の作用部２４ｂがレバー下部１６Ａの前側に位置して
いる。尚、２６は操縦塔１５を後方に復帰付勢させる復
帰シリンダである。前記切欠き２３のうち、下側の３個
は接近して配置され、その中の一つを選択設定するカバ
ー板２８が、軸心Ｐ周りに移動自在、かつ、操縦塔１５
との相対係止位置を変更自在に設けてある。つまり、ボ
ルト２９と長孔３０との相対係止位置を調節して止める
のである。As shown in FIGS. 3 and 4, a locking plate 17 is attached to the lower portion of the control tower 15, and a bracket 15a at the lower portion of the control tower 15 which projects rearward is rotatable about the left and right axis X. The link 18 is attached, and the pressing rod 18a attached near the axis X of the link 18 is pulled forward by the return spring 19 pivotally supported by the lock plate 17, whereby the link 18 is urged clockwise in the figure. And the moving lever 1
The link 18 and the bracket 15a are abutted so that the link 18 is locked at a position where the counter link pivot fulcrum 18b of the rod 21 interlocking with 6 and the swing axis P of the control tower 15 coincide. The rod 21 is a lower portion 16A of the moving lever 16.
Is connected to the pin 16a by a long hole 21a, and is urged relatively by a spring 22 so that the pin 16a is located at the right end of the long hole 21a in the figure. The locking plate 17 has four cutouts 23 formed on an arcuate surface 17a centered on the axis P, and a locking piece 24 having a claw portion 24a engageable with the cutout 23 is formed. , Is pivotally attached to the mounting portion 25 of the control tower 15 about the vertical axis Y, and is pivotally supported in a state in which the claw portion 24a is spring-biased in a direction of moving toward the notch 23, and is locked. Piece 2
4 acting portion 24b is located on the front side of the lower lever portion 16A. Reference numeral 26 is a return cylinder for urging the control tower 15 to return to the rear. The lower three of the notches 23 are arranged close to each other, and a cover plate 28 for selectively setting one of the notches 23 is movable around the axis P and the control tower 15
The relative locking position with respect to is provided so as to be freely changeable. That is, the relative locking position between the bolt 29 and the long hole 30 is adjusted and stopped.

【０００９】次に、前記構造による作用を説明する。先
ず、図５に示す操作レバー１３が乗降姿勢であるとき
に、移動レバー１６を中立位置Ｎから前方に倒して第１
係止解除位置Ｋ1 に操作すると、ロッド２１を介してリ
ンク１８を図中反時計周り方向に回動し、押圧棒１８ａ
が係止片２４を押して爪部２４ａと上側の切欠き２３と
の係合を解除するとともに、リンク１８の作用面１８ｃ
が操縦塔１５の後壁１５Ａに接当した状態になる。そし
て、尚も移動レバー１６を倒し続けると後壁１５Ａと作
用面１８ｃとの接当によってリンク１８の単独回動は不
能となるが、ロッド２１との枢支点１８ｂが軸心Ｐより
も下に移動している位置関係によって、操縦塔１５がリ
ンク１８と一体で前方に揺動移動する。そして、第１係
止解除位置Ｋ1 から少し倒し込んだ位置で押圧棒１８ａ
の爪部２４ａへの押圧作用がなくなり、爪部２４ａは係
止板の円弧面１７ａ上に押圧接当する状態に変化する。
さらに移動レバー１６を倒し込むと、カバー板２８で選
択された下側の切欠き２３に係止片２４が自動的に嵌ま
り込んだ係止位置Ｒとなり、その位置で操縦塔１５の揺
動と移動レバー１６の倒し込みが停止し、つまり、図３
に示すように操縦塔１５が操縦姿勢になる。移動レバー
１６を離すと、リンク１８はリターンバネ１９によって
もとの状態に復帰し、よって移動レバー１６は中立位置
Ｎに自己復帰する。（尚、図面理解上、係止板の円弧面
１７ａとカバー板２８の円弧面とは異なるように描かれ
ているが、実際は両者は等しい半径を有している。）Next, the operation of the above structure will be described. First, when the operation lever 13 shown in FIG. 5 is in the getting on / off posture, the moving lever 16 is tilted forward from the neutral position N to move the first lever.
When operated to the unlocked position K1, the link 18 is rotated counterclockwise in the figure via the rod 21 to push the push rod 18a.
Presses the locking piece 24 to release the engagement between the claw portion 24a and the upper cutout 23, and the action surface 18c of the link 18
Is in contact with the rear wall 15A of the control tower 15. If the moving lever 16 is still kept tilted, the link 18 cannot rotate independently due to the contact between the rear wall 15A and the working surface 18c, but the pivot point 18b with the rod 21 is below the axis P. Due to the moving positional relationship, the control tower 15 swings forward together with the link 18. Then, at the position slightly retracted from the first locking release position K1, the pressing rod 18a
The pressing action of the claw portion 24a on the claw portion 24a disappears, and the claw portion 24a changes into a state of being pressed against the circular arc surface 17a of the locking plate.
When the moving lever 16 is further tilted down, the locking piece 24 is automatically fitted into the lower cutout 23 selected by the cover plate 28 to reach the locking position R, and at that position, the control tower 15 swings. And the fall of the moving lever 16 is stopped, that is, in FIG.
As shown in FIG. When the moving lever 16 is released, the link 18 is returned to the original state by the return spring 19, so that the moving lever 16 self-returns to the neutral position N. (In order to understand the drawing, the arcuate surface 17a of the locking plate and the arcuate surface of the cover plate 28 are drawn differently, but in reality, they have the same radius.)

【００１０】次に、図３に示す操作レバー１３が操縦姿
勢にあるときに移動レバー１６を後側に倒して第２係止
解除位置Ｋ2 に操作すると、レバー下部１６Ａが係止片
２４の作用部２４ｂを前方に押し操作して爪部２４ａと
切欠き２３との係合を解除し、操縦塔１５は復帰シリン
ダ２６によって自動的に乗降姿勢に戻るのである。乗降
姿勢に操縦塔１５を位置決めするように設定しておけ
ば、移動レバー１６を第２係止解除位置Ｋ2 に、一瞬あ
るいは継続して操作するに関係なく乗降姿勢への自己復
帰機能を生じさせることができる。ここでは、係止片２
４と切欠き２３とで姿勢維持機構Ｄが、ロッド２１、リ
ンク１８、係止片２４、切欠き２３等から連係操作機構
Ａが、図４に示すように、レバー下部１６Ａ、係止片２
４等から解除機構Ｂが夫々構成されている。Next, when the operating lever 13 shown in FIG. 3 is in the maneuvering posture, the moving lever 16 is tilted rearward to operate to the second locking release position K2, and the lower lever portion 16A acts as the locking piece 24. By pushing the portion 24b forward, the engagement between the claw portion 24a and the notch 23 is released, and the control tower 15 is automatically returned to the getting on / off posture by the return cylinder 26. If the control tower 15 is set to be positioned in the getting on / off posture, the self-return function to the getting on / off posture is generated regardless of whether the moving lever 16 is moved to the second unlocked position K2 for a moment or continuously. be able to. Here, the locking piece 2
4 and the notch 23, the posture maintaining mechanism D, the rod 21, the link 18, the locking piece 24, the linking operation mechanism A from the notch 23, and the like, as shown in FIG.
The release mechanism B is composed of 4 and the like.

【００１１】図１、図２に示すように、操縦塔１５が使
用姿勢から乗降姿勢に移動されるに従って、自動的に操
作レバー（操作具に相当）１３をロック部材２０によっ
て中立位置Ｎに係止維持させる自動ロック機構Ｃを設け
てある。すなわち、ロック部材２０を、丁度中立位置Ｎ
にある操作レバー１３下端のボス部２７に対して出退自
在となるように、ガイド３１を介して上下スライド自在
に操縦塔１５内部に設けるとともに、このロック部材２
０の下端部に長孔とピンとの係合構造で連動連結される
Ｌ字カム３２を左右軸心Ｑ周りで揺動自在に操縦塔１５
に枢支し、かつ、このＬ字カム３２を引っ張りバネ３６
によってロック部材２０が下がる方向に付勢してある。
一方、操縦塔１５を揺動自在に支持する固定部３３に
は、上端にローラ３４を軸支した係合ブラケット３５を
取付けてあり、以上の構造によって自動ロック機構Ｃが
構成されている。作用を説明すると、図１に示すように
操縦塔１５が使用姿勢にあると、引っ張りバネ３６によ
ってロック部材２０はボス２７から下方に離脱した非ロ
ック状態にあり、操作レバー１３の自由な操作が可能で
ある。そして、図２に示すように操縦塔１５を使用姿勢
から乗降姿勢に向けて引き起こすと、Ｌ字カム３２がロ
ーラ３４に接当干渉して図中時計周り方向に強制揺動さ
れ、ロック部材２０がボス２７に係入してのレバーロッ
ク状態が現出されるのである。尚、Ｌ字カム３２の揺動
軸３８には、操縦塔１５の外部において人為的にレバー
ロック操作するための手動ロックレバー３７が連結され
ている。自動ロック機構Ｃとしては、例えば、操縦塔１
５が乗降姿勢に操作されると作動するスイッチを設け、
このスイッチの作動によって操作レバー１３の動きを牽
制するソレノイドが作動してレバーロックする等、種々
の手段が考えられる。As shown in FIGS. 1 and 2, as the control tower 15 is moved from the use posture to the getting on / off posture, the operation lever (corresponding to an operation tool) 13 is automatically engaged with the lock member 20 at the neutral position N. An automatic lock mechanism C is provided to maintain the stop. That is, the lock member 20 is moved to the neutral position N
The lock member 2 is provided inside the control tower 15 so as to be vertically slidable through a guide 31 so that the lock member 2 can freely move in and out of the boss portion 27 at the lower end of the operation lever 13.
An L-shaped cam 32, which is interlockingly connected to the lower end of 0 by an engagement structure of a long hole and a pin, is swingable around a left-right axis Q.
And the L-shaped cam 32 is pulled by a spring 36.
The lock member 20 is urged in the downward direction.
On the other hand, an engaging bracket 35 pivotally supporting a roller 34 is attached to the upper end of a fixed portion 33 that swingably supports the control tower 15, and the automatic lock mechanism C is configured by the above structure. The operation will be described. When the control tower 15 is in the use posture as shown in FIG. 1, the tension spring 36 causes the lock member 20 to be released downward from the boss 27 and is in an unlocked state, so that the operation lever 13 can be freely operated. It is possible. Then, as shown in FIG. 2, when the control tower 15 is raised from the use posture toward the getting on / off posture, the L-shaped cam 32 abuts on and interferes with the roller 34, and is forcibly rocked clockwise in the drawing, and the lock member 20. That is, the lever lock state is brought out by engaging with the boss 27. A manual lock lever 37 for artificially performing a lever lock operation outside the control tower 15 is connected to the swing shaft 38 of the L-shaped cam 32. As the automatic lock mechanism C, for example, the control tower 1
A switch that operates when 5 is operated to get on and off,
Various means are conceivable, for example, a solenoid for restraining the movement of the operating lever 13 is activated by the operation of this switch to lock the lever.

【００１２】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

【図面の簡単な説明】[Brief description of drawings]

【図１】自動ロック機構の構造を示す側面図FIG. 1 is a side view showing the structure of an automatic lock mechanism.

【図２】自動ロック機構の作動状態を示す側面図FIG. 2 is a side view showing an operating state of the automatic lock mechanism.

【図３】操縦塔が乗降姿勢にあるときの操作構造を示す
側面図FIG. 3 is a side view showing an operation structure when the control tower is in a boarding / alighting posture.

【図４】解除機構の構造を示す要部の斜視図FIG. 4 is a perspective view of a main part showing a structure of a release mechanism.

【図５】操縦塔が操縦姿勢にあるときの操作構造を示す
側面図FIG. 5 is a side view showing an operation structure when the control tower is in a control posture.

【図６】バックホウの側面図FIG. 6 is a side view of the backhoe.

【符号の説明】[Explanation of symbols]

２ 作業装置 １１ 運転座席 １３ 操作具 １５ 操縦塔 Ｓ 通路 Ｃ 自動ロック機構 2 work device 11 driver's seat 13 operation tool 15 control tower S passage C automatic lock mechanism

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 上部に作業装置（２）の操作具（１３）
を備えた操縦塔（１５）を、該操縦塔（１５）がこれの
前方に位置する乗降用通路（Ｓ）へ張り出た使用姿勢
と、前記操縦塔（１５）が前記乗降用通路（Ｓ）から後
方に退避した乗降姿勢とを現出するべく前後移動可能に
運転座席（１１）の横側位置に備えてある作業車の操作
装置であって、前記操縦塔（１５）が前記使用姿勢から
前記乗降姿勢に移動されるに従って、自動的に前記操作
具（１３）をロック部材によって中立位置に係止維持さ
せる自動ロック機構（Ｃ）を設けてある作業車の操作装
置。1. An operating tool (13) for a working device (2) at the upper part
And a use posture in which the control tower (15) provided with the above-mentioned control tower (15) projects to a boarding / alighting passage (S) located in front of the control tower (15), and the control tower (15) has a boarding / alighting passage (S). ) Is an operating device for a work vehicle provided in a lateral position of the driver's seat (11) so as to be able to move back and forth so as to reveal an on-and-off posture retracted rearward from the control tower (15). An operating device for a work vehicle provided with an automatic locking mechanism (C) for automatically locking and maintaining the operating tool (13) at a neutral position by a lock member as the operating tool (13) is moved from the vehicle to the boarding / alighting posture.