PROBLEM TO BE SOLVED: To provide a rotary cultivator which has upward or downward movable portions and facilitates to attach or detach an electric motor for upward or downward moving the movable portions.SOLUTION: The rotary cultivator in which fitting portions for detachably fitting an output shaft 62 of an electric motor to rotate portion-operating rods with the power of the electric motor 56, to the axial end sides of the portion-operating rods of movable portion-operating devices 33L, 85, 108 for upward or downward moving the movable portions 28, 9, 8, includes: an engaging member which is swingably pivotally supported and swung in a state fitting the output shaft to the fitting portion on the electric motor side, thereby detachably engaging the engaging member with a retaining portion disposed on the movable portion-operating device side to prevent the release of the output shaft from the fitting portion and a rotation control unit 59 for controlling the rotation of a main body portion of the electric motor on the output shaft by the fitting operation of the output shaft to the fitting portion or by the engaging operation of the engaging member with the retaining portion, between the electric motor side and the movable portion-operating device side.COPYRIGHT: (C)2011,JPO&INPIT【課題】上げ下げされる可動部を備えたロータリ耕耘機において、可動部を上げ下げするための電動モータの着脱の容易化を図る。【解決手段】可動部28,9,8を上げ下げさせるための可動部操作装置33L,85,108の回転操作杆の軸芯方向一端側に、該回転操作杆を電動モータ56の動力によって回転させるべく該電動モータの出力軸62を嵌脱自在に嵌合させるための嵌合部を設けたロータリ耕耘機において、電動モータ側に、揺動自在に枢支されていて出力軸を嵌合部に嵌合させた状態で揺動させることにより可動部操作装置側に設けた抜止め部に係脱自在に係合して出力軸の嵌合部からの抜け止めをする係合部材を設け、且つ、電動モータ側と可動部操作装置側との間に、出力軸の嵌合部への嵌合動作、或いは、係合部材の抜止め部への係合動作によって電動モータの本体部分の出力軸軸芯廻りの回転を規制する回転規制手段59を備える。【選択図】図1
