PROBLEM TO BE SOLVED: To provide a rotary cutting blade decreasing bounce phenomena in the cutting work of miscellaneous trees, preventing the blade from collision to the ground or obstacles, having a groove coated with a fluorescent coating to be able to be easily recognize the position of the blade so as to prevent occurrence of troubles, and preventing the reaped weed from entangling on the connector portion of a mower, and the like.SOLUTION: There is provided a mower cutting blade 100 having a joint hole 114 at the center and equipped with at least two radius blades 112, which further includes a platy body 110 having the radius blades 112 at one side end to position in the mutual diagonal direction with a focus on the joint hole 114, an extension 120 extended from the edge of the body 110 and formed to equip a periphery blade 122 formed to gradually decline outside in the reverse direction of the rotational direction and from one end part of the radius blades 112, and at least two or more bents 130a and 130b extended from one side end of the body 110 to form to position at the reverse side of the radius blades 112 and bent upward or bent downward to the body 110.COPYRIGHT: (C)2012,JPO&INPIT【課題】雑木の切断作業の際に跳ねる現象を減らし、地面や障害物に刃が衝突することを防ぎ、蛍光塗料が塗布された溝を備えて刃の位置を容易に認知し得て事故の発生を防ぐと共に、刈り取った雑草が刃と草刈機の結合部位に絡んだりすることを防ぐ回転切断刃を提供する。【解決手段】中央に結合孔114が備えられ、少なくとも二つ以上の半径刃部112が備えられた草刈機用切断刃100において、結合孔114を中心に相互対角方向に配置するよう一側端に半径刃部112が備えられた板状の胴体110と、半径刃部112の一端部から回転方向の逆方向に向けて外側に徐々に傾斜するよう形成された周辺刃部122が備えられるよう胴体110の端部から延長形成される延長部120と、半径刃部112の反対側に配置するよう胴体110の一側端から延長形成され、胴体110に対して上向折曲または下向折曲された少なくとも二つ以上の折曲部130a、130bを含む。【選択図】図2
