The cutting blade, in which the number of conventional outer peripheral blades is used as the name, has caused an accidental damage by rubbing an abutting material, such as pebbles, around the work neighborhood during the cutting operation such as mowing. The blade and the mass of the scattering contact piece are reduced to provide a cutting blade with a reduced dispersion energy.The cutting blade of the outer peripheral blade 4 is divided into a plurality of steps, thereby minimizing the kinetic energy to be applied to the abutment by the step size a which is ultimately shortened, and the cutting ability is maintained while the occurrence of the damage accident is eliminated.Diagram【課題】従来の外周刃の枚数を呼称としている刈り払い刃は、草刈り等の刈り払い作業回転に際し、作業近隣周囲に小石等の当接物を飛散させて、損壊事故を起こしていた。飛散当接物の体積や質量を小さくして飛散エネルギーを微弱化した刈り払い刃を提供する。【解決手段】外周刃４の切断刃を複数段に分割することにより、究極的に短小化した段差形状ａにより、当接物に与える運動エネルギーを最小化して損壊事故の発生を排除しながらも、刈り払い機能は維持した刈り払い刃とした。【選択図】図１
