The present invention when it is scratched work object surface, pebbles or the like on the working surface the object to provide a herbicidal rotary blade to mitigate that popping outward. .. A herbicidal rotary blade 100 is attached to the brush cutter 110 is driven to rotate around the rotational axis L by a driving unit of the cutter 110 ??. Herbicidal rotary blade 100 is formed so as to extend in a plane perpendicular to the rotation axis L, the bottom surface is a plate-shaped rotary blade body 1 to form the blade section 3 facing the working target surface, the rotational axis L The perpendicular to the disc portion 20 formed in a disk shape extending in a plane, and a peripheral portion 21 extending downwardly from the outer edge of the circular plate portion 20, the rotary blade body 1 and I and a protective cover 2, which is arranged so as to cover from above. Rotary blade body 1 and the protective cover 2 rotates integrally about the rotation axis L, the position corresponding to the tip of the blade section 3 at the outer peripheral portion 21, the cutout to allow the ingress of weeds into the protective cover in the 2 22 is opened. .. [Selection Figure Figure 5.【課題】作業対象面を掻いた際に、該作業対象面上の小石等が外向きに飛び出ることを緩和する除草用回転刃を提供する。【解決手段】除草用回転刃100は、刈払機110に取り付けられ、該刈払機110の駆動部によって回転軸線L周りに回転駆動される。除草用回転刃100は、回転軸線Lと直交する面内に延在するように形成され、下面が作業対象面に対向する刃部3を形成した板状の回転刃本体1と、回転軸線Lと直交する面内に延在して円板状に形成された円板部20と、該円板部20の外周縁から下向きに延びた外周部21とを有し、該回転刃本体1を上方から覆うように配置された保護カバー2とを備えている。回転刃本体1と保護カバー2は回転軸線L周りに一体に回転し、外周部21にて刃部3の先端部に対応する箇所には、保護カバー2内への雑草の進入を許す切欠き22が開設されている。【選択図】 図5
