PROBLEM TO BE SOLVED: To provide a rotary blade for a bush cutter in which the dressing can easily be performed and the sharpness is easily recovered.SOLUTION: A rotary blade 10 for a bush cutter includes a rotary base body 11 being disk-shaped, and multiple blade parts 12 provided in an outer circumferential part of the rotary base body 11. As each blade part 12 forms substantially a triangular shape in top view having a first edge α directed to the front side to the rotating direction A of the rotary base body 11 and a second edge β directed to the diagonal rear side to the rotating direction A of the rotary base body 11, blade surfaces α1, β2 are formed in substantially the whole of both of the first edge α and the second edge β, and the first edge α in each blade part 12 is recessed and formed in an arc shape in the rear side to the rotating direction A of the rotary base body 11.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】 目立てを容易に行うことができ、その切れ味を回復させることの容易な刈払機用回転刃を提供する。【解決手段】 円板状を為す回転基体11と、回転基体11の外周部に設けられた複数の刃部12とを備えた刈払機用回転刃10において、それぞれの刃部12を、回転基体11の回転方向Aに対して前側を向く第一縁部αと、回転基体11の回転方向Aに対して斜め後側を向く第二縁部βとを有する上面視略三角形状を為すものとして、第一縁部α及び第二縁部βの双方の略全体に刃面α1,β2を形成するとともに、それぞれの刃部12における第一縁部αを、回転基体11の回転方向Aに対して後側に円弧状に窪んで形成した。【選択図】図2
