PROBLEM TO BE SOLVED: To provide a paddy field working machine that prevents damages caused by the ruggedness of field and by collisions with obstacles, secures durable fixing constitution of a wave-breaking member and suppresses side dispersions of water and soil and sand, pushed out by a float and outside dispersions of mud flow wave caused by the rotation of traveling wheels and a rotor for grinding soil mass.SOLUTION: The paddy field working machine 1 is equipped with a machine body 2 supported by the traveling wheels 11 so as to travel in a paddy field, a working apparatus 4 that is mounted on the machine body 2 and carries out paddy field operation and the float 56, that is arranged at the front side of traveling of a traveling position P by the working apparatus 4 and ground levels the paddy field. On the side position of the float 56, a wave-breaking plate 71 that goes beyond the front edge position of the float and extends in the front and in the rear is arranged, and the wave breaking plate 71 is rotatably and pivotally supported by a support shaft 72, in the vehicle width direction, behind the position of the center of gravity of the wave-breaking plate.COPYRIGHT: (C)2009,JPO&INPIT【課題】圃場の凹凸や障害物との衝突による破損を防止して防波部材の耐久的な取付け構成を確保するとともに、フロートの押出し泥水土砂の側方拡散および走行用車輪の回動や土壌塊粉砕用のローターによって発生する泥流波の外側方拡散を抑えることができる水田作業機を提供する。【解決手段】水田作業機1は、走行用車輪11によって水田走行が可能に支持された機体2と、この機体2に搭載されて水田作業を行う作業装置4と、この作業装置4による作業位置Pの走行前方側に配置されて圃場を均平整地するフロート56とを備えて構成され、上記フロート56の側方位置には、その前端位置を越えて前後に延びる防波板71を設け、この防波板71はその重心点位置の後方で車幅方向の支持軸72について回動可能に軸支したものである。【選択図】図4
