The present invention safety in order to mowing work with the brush cutter , to provide a rotary cutting blade for the purpose of improving the work efficiency . A shape that is upward arched at an angle from the blade bottom two dozen mm~ three dozen mm center side a few degrees the part of the blade to be positioned on the outer peripheral part in the round part of to several tens of degrees rotating cutting blade 1 to . By smoothly curved portion 4 is grounded during rotation before the cutting edge 3 , is to measure the effect of work efficiency due to damage mitigation effect as the cutting edge of safety due to scattering and kickback of pebbles and gravel to reduce can be , and is excellent in practicality . [ Selection Figure ] Figure 1【課題】刈払機による草刈作業する上での安全面、作業効率の向上を目的とするための回転刈刃を提供する。【解決手段】回転刈刃1の刃底2から十数mm~三十数mm中心側の周回部分で外周部分に位置する刃の部分を数度~十数度の角度で上向きに反らせた形状とする。回転中に刃先3より先に滑らかな湾曲部4が接地することで、小石や砂利の飛散やキックバックが軽減することによる安全面の効果と刃先の損傷軽減による作業効率の効果をはかることができ、実用性に優れたものである。【選択図】図1
