An object of the present invention Mowing ?? rate fall will become smaller in size each time you polish the cutting edge in the cut edge. Is difficult cutting edge polishing and is led to tipped. is cut ceased mowing blade is replaced by preparing several sheets blade replacement, but must carry around many pieces of blade bulky heavy, collectively burden of and it is time has been polishing the cutting edge time The large. The resources it has gone after is discarded and not used only only cutting edge, cost also effective use is desired A Therefore, off ceased cutting edge only detachable easily the mowing blade body outer periphery in order to be exchanged is provided a plurality alternately U-shaped member and Tsumeana to pay the blade but, L type that is fitted to the Tsumeana collectively the blade is replaced with a pressing member having a nail is to ensure easy detachment was sandwiched. The work replacement can temporarily stopped by be or shift in fear and spare blade exchange fall lost because it is small blade to keep magnetized blade changing since it is expected to be smooth [Selection Figure Figure 1【課題】 切り込み刃においては刃先を研磨するたびにサイズが小さくなっていき刈払効率が落ちる。チップソーに至っては刃先研磨が難しい。切れ止んだ刈払刃は交換用の刃を数枚用意して取り替えているが、重くてかさばる刃を何枚も持ち歩かなければならず、まとめて刃先を研磨しているが手間と時間の負担は大きい。また刃先部だけしか使わずあとは捨てられてしまっており資源的、コスト的にも有効利用が望まれる。【解決手段】 そこで切れ止んだ刃先だけを着脱容易に交換できるようにするため刈払刃本体外周部に替刃を納めるコの字型部材と爪穴を交互に複数個設け、爪穴に嵌合させるL型爪を有する押さえ部材をもって替え刃を一括して挟み込み確実容易に着脱できるようにした。また小さな替刃であるため落下紛失の恐れや替え刃交換中にズレたりすることが予測されるため替え刃を磁化しておくことで仮止めができ交換作業がスムーズにできる。。【選択図】図1
