PROBLEM TO BE SOLVED: To provide a bush cutter, in which an engagement portion vibration-proofing portion is neither crushed nor broken between an engaging projection and an engaging recess even if a load for rotating in a circumferential direction of a support rod is applied to a cutter unit.SOLUTION: A bush cutter 10 comprises: a cutter unit 20 mounted on a front end portion of a support lever 11 and a vibration-proofing cylindrical soft elastic member 12 interposed between the front end portion of the support lever 11 and a mounting portion 21c of a forward end housing 21 of the cutter unit 20. The soft elastic member 12 includes: an engagement portion vibration-proofing portion 12b interposed between an engaging recess 11a of the support lever 11 and an engaging portion of an engaging projection 21d of the front end housing 21 and a notched portion 12c formed so that the engaging recess 11a and the engaging projection 21d may confront through a clearance. The engaging projection 21d is equipped, at a position forming the notched portion 12c, with a stopper portion 21e protruding towards the engaging recess 11a less than the thickness of the engagement portion vibration-preventing portion 12b at a position formed with the notched portion 12c.COPYRIGHT: (C)2014,JPO&INPIT【課題】カッタユニットに支持棹の周方向に回動する負荷が加わっても、柔軟弾性体の係合部分防振部が係合突部と係合凹部との間で押し潰されて破損することのない刈払機を提供する。【解決手段】刈払機10は、支持棹11の前端部に設けたカッタユニット20と、支持棹11の前端部とカッタユニット20の前端ハウジング21の取付部21cとの間に防振のための筒形の柔軟弾性体12とを備え、柔軟弾性体12には支持棹11の係合凹部11aと前端ハウジング21の係合突部21dとの係合部分の間に介装された係合部分防振部12bと、係合凹部11aと係合突部21dとが間隙を設けて対向するように形成された切欠き部12cとを設け、係合突部21dには切欠き部12cを形成した位置に係合部分防振部12bの厚みより小さく係合凹部11aに向けて突出したストッパ部21eを設けた。【選択図】図2
