PROBLEM TO BE SOLVED: To provide a cutter that causes no cutting force deterioration due to weakening of contact pressure (mechanical resistance) of a rotary blade and weeds and that generates no rolling-in phenomenon in which the shaft of the rotary blade is entangled with cut weeds.SOLUTION: On the upper face of the base material of the rotary blade 3, there are installed rectangular wing pieces 7 that radially project from the center to the outer periphery. An air stream is generated upwardly from the lower part by the function of the wing pieces 7, so that weeds are held upright to improve the cutting force. At the same time, the cut weeds are blown away and prevented from the phenomenon of rolling in the shaft of the rotary blade 3.COPYRIGHT: (C)2015,JPO&INPIT【課題】回転刃と草類の接触圧力(機械的抵抗)が弱くなることによる切断力の低下が発生しない、さらに回転刃の軸部に刈り取られた草類が絡み付く巻き込み現象も発生しない刈り払い機を提供する。【解決手段】回転刃3の基材の上面に中心部から外周部に向け放射状に突出した長方形の翼片7を設け、翼片7の機能で下から上方向へ空気の流れを発生せしめて、草類を直立状態に保持し切断力の向上を図る、と共に刈り取られた草類は吹き飛ばされて回転刃3の軸部への巻き込み現象を防止する。【選択図】図1
