PROBLEM TO BE SOLVED: To provide a riding type paddy field working machine that easily avoids occurrence of improper ground height control of paddy field working apparatus and performs a lifting and lowering operation of ground-leveling rotor by a simple structure in spite of leveling ground by a freely rotatable and drivable ground-leveling rotor.SOLUTION: The rotatable and drivable ground-leveling rotors 50 are arranged at the right and left sides of a ground sensor float 12. A pair of transmission means 60 and 60 for separately transmitting power to the right ground-leveling rotor 50 and the left ground-leveling rotor 50 are disposed. A right support means 70R for liftably and lowerably supporting the right ground-leveling rotor 50 on the frame 14 of the paddy field working apparatus and a left support means 70L for liftably and lowerably supporting the light ground-leveling rotor 50 on the frame 14 of the paddy field working apparatus are installed. An interlocking means for interlocking the right support means 70R and the left support means 70L is arranged and a drive mechanism for operating the left ground-leveling rotor 50 to the lifting side and the lowering side is mounted.COPYRIGHT: (C)2011,JPO&INPIT【課題】回転駆動自在な整地ロータによる整地を行わせるものでありながら、水田作業装置の不適切な対地高さ制御の発生を回避しやすく、かつ整地ロータの昇降操作を構造簡単に行うことができる乗用型水田作業機を提供する。【解決手段】接地センサフロート12の左側及び右側に、回転駆動自在な整地ロータ50を設けてある。左側の整地ロータ50と右側の整地ロータ50とに各別に動力伝達する一対の伝動手段60,60を設けてある。左側の整地ロータ50を水田作業装置のフレーム14に対して昇降自在に支持する左支持手段70L、右側の整地ロータ50を水田作業装置のフレーム14に対して昇降自在に支持する右支持手段70Rを設けてある。左支持手段70Lと右支持手段70Rを連動させる連動手段を設け、左側の整地ロータ50を上昇側及び下降側に操作する駆動機構を設けてある。【選択図】図4
