PROBLEM TO BE SOLVED: To provide a work vehicle capable of improving maintainability of a mechanism for controlling lifting operation and work action of a ground work device.SOLUTION: A work vehicle comprises: a lifting linkage mechanism that is provided on the rear part of a traveling vehicle body and lifts and lowers a ground work device a lifting cylinder that makes the lifting linkage mechanism perform lifting action an operation instrument comprising a lifting operation member for activating the lifting cylinder and a work ON/OFF member for switching the ground work device between a work state and a non-work state a switching valve that switches the lifting cylinders action by using movement of a spool a drive unit that starts according to operation using the lifting operation member or the work ON/OFF member a switching arm that is rotated by the drive unit to move the spool a rotation sensor that detects the amount of rotation of the switching arm and a control unit that controls the ground work devices lifting action and work action, on the basis of the operation using the lifting operation member or the work ON/OFF member and a detection value of the rotation sensor at the time of the operation using the lifting operation member or the work ON/OFF member.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】対地作業装置の昇降操作や作業動作を制御する機構のメンテナンス性を向上させることのできる作業車両を提供すること。【解決手段】走行車体の後部に設けられ、対地作業装置を昇降させる昇降リンク機構と、昇降リンク機構に昇降動作させる昇降シリンダと、昇降シリンダを作動する昇降操作部材と、対地作業装置を作業状態と非作業状態とに切り替える作業入切部材とを備える操作具と、昇降シリンダの動作を、スプールの移動により切り替える切替バルブと、昇降操作部材または作業入切部材の操作に応じて作動する駆動部と、駆動部により回動し、スプールを移動させる切替アームと、切替アームの回動量を検出する回動センサと、昇降操作部材または作業入切部材の操作と、昇降操作部材または作業入切部材の操作時における回動センサの検出値に基いて、対地作業装置の昇降動作および作業動作を制御する制御部とを備える。【選択図】図3
