PROBLEM TO BE SOLVED: To inexpensively constitute a device for controlling the expansion and contraction of a hydraulic cylinder for lifting and lowering a transplanting implement by using an electromagnetic control valve.SOLUTION: The transplanter is equipped with a mode-switching means 33 enabling the switching between a clutch-operable mode enabling the on-off operation of a transplanting switch by a lifting and lowering operation device 28 of the transplanting implement 13 installed at the vicinity of a steering wheel 8, and a clutch-unoperable mode for disabling the on-off operation of the transplanting clutch. The slow-speed lifting and lowering action of the transplanting implement 13 through the electromagnetic valves 25a and 25b by the lifting and lowering operation device 28 is enabled in the clutch-unoperable mode.COPYRIGHT: (C)2010,JPO&INPIT【課題】植付作業機を昇降作動させる油圧シリンダの伸縮制御装置を電磁制御弁を用いて安価に構成する。【解決手段】ステアリングホイール8の近傍に設けた植付作業機13の昇降操作具28による植付クラッチの入切操作を可能にするクラッチ操作可能モードと、植付クラッチの入切操作を不能にするクラッチ操作不能モードとに切換えできるモード切換手段33を設けると共に、前記クラッチ操作不能モード下では、当該昇降操作具28による電磁制御弁25a,25bを介しての植付作業機13の緩速昇降作動を可能にした。【選択図】図7
