PROBLEM TO BE SOLVED: To always satisfactorily perform the cutting of road edge weed, etc. by improving a structure of the surface of a cutting blade part on a rotating blade for a mowing machine.SOLUTION: A central surface part, including a shaft center of a thin disk body made of a spring steel material as a whole, is formed into a horizontal surface shape on an outer-periphery part adjacent to this central surface part, a cutting blade part 7, on which one side surface part is formed into a recessed shape and the other side surface part is formed into a projected shape, is formed into a waveform shape in one rotation direction and this waveform shape of the cutting blade part surface is not formed into a triangular shape but into a circular-arc curved surface shape 8.COPYRIGHT: (C)2014,JPO&INPIT【課題】 刈払い機用回転刃における切刃部面の構成を改善することによって、道路端の雑草類の刈払い作業を常に良好に行うことを目的とする。【解決手段】 全体が発条鋼材による薄円板体の軸心を含む中央面部分は水平面形状に成り、この中央面部分に隣接する外周囲部分には一側面部が凹面形状に他側面部が凸面形状に成る切刃部7を一回転方向の波形状に形成して設け、この切刃部面の波形状は三角山状ではなく円弧曲面形状8に形成して成るものである。【選択図】 図6
