PROBLEM TO BE SOLVED: To provide a paddy field work machine having an appropriate configuration which does not generate such a state that a ground levelling device (ground levelling body) is driven to be rotated at a non-work position in supporting the ground levelling device in a front part of a ground work device so as to be freely lifted and lowered.SOLUTION: A transmission mechanism 75 transmitting power to a ground levelling device 53 includes: a clutch mechanism 45 capable of transmitting and cutting off the power and an energization mechanism 14 energizing the clutch mechanism 45 to a cut-off state. When the ground leveling device 53 is driven to be lowered to a work position A3 by an actuator, lowering actuation of the ground leveling device 53 is transmitted to the clutch mechanism 45 and the clutch mechanism 45 is operated into a transmission state against the energization mechanism 14. When the ground leveling device 53 is driven to be lifted to a non-work position A4 by the actuator, the clutch mechanism 45 is operated into the cut-off state by the energization mechanism 14.SELECTED DRAWING: Figure 10COPYRIGHT: (C)2017,JPO&INPIT【課題】整地装置を対地作業装置の前部に昇降自在に支持した場合、非作業位置で整地装置(整地体)が回転駆動される状態が生じないような構成を、適切に得る。【解決手段】整地装置53に動力を伝達する伝動機構75に、動力を伝動及び遮断自在なクラッチ機構45と、クラッチ機構45を遮断状態に付勢する付勢機構14を備える。アクチュエータにより整地装置53が作業位置A3に下降駆動されると、整地装置53の下降作動がクラッチ機構45に伝達されて、付勢機構14に抗してクラッチ機構45が伝動状態に操作される。アクチュエータにより整地装置53が非作業位置A4に上昇駆動されると、付勢機構14によりクラッチ機構45が遮断状態に操作される。【選択図】図10
