PROBLEM TO BE SOLVED: To provide a bush-cutting rotary blade that can easily attach a thread blade to the rotary blade without removing a rotary blade from a bush-cutter, and can improve efficiency of bush-cutting work by precisely responding to various bush clearing places.SOLUTION: A bush-cutting rotary blade is characterized in that multiple thread blade locking parts of a predetermined height with a thread blade locked therein are provided on a circumference line becoming the outside from an outer circumference of a saw-receiving flange of the bush-cutter in a mounting surface of a base metal to a bush-cutter, and the thread blades are detachably locked in each thread blade locking part, respectively. The thread blade is formed of a nylon cord of a predetermined length, and a locking part for preventing the coming-off to an outer circumferential edge direction of the base metal from a thread blade locking part is provided in the proximal end, and also the distal end is positioned outside from the cutting edge of the base metal by a predetermined size. Also, the thread blade locking part is formed by cylindrically curling a portion punched in the U-shape of the base metal in a plan view, or is formed by a protrusion formed in a mounting surface of the base metal.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】回転刃を刈払い機から取り外すことなく回転刃に糸刃を簡単に取り付けることができ、各種刈払い場所に的確に対応して、刈払い作業の効率を向上させ得る刈払い用回転刃を提供する。【解決手段】台金の刈払い機への取付面で当該刈払い機の鋸受けフランジの外周より外側となる円周線上に、糸刃が係止される所定高さの複数の糸刃係止部が設けられ、各糸刃係止部に糸刃がそれぞれ着脱可能に係止されることを特徴とする。前記糸刃が所定長さのナイロンコードで形成され、その基端部に糸刃係止部からの台金の外周縁方向への抜けを防止する係止部が設けられると共に、その先端部が台金の刃先より所定寸法外側に位置する。また、前記糸刃係止部が、台金の平面視コ字状に打ち抜いた部分を筒状にカーリングすることで形成されるか、あるいは台金の取付面に形成される凸部で形成される。【選択図】図1
