PROBLEM TO BE SOLVED: To provide a pruning machine, which is free from deterioration of durability due to impact when blades are locked.SOLUTION: A connecting part between a gear 41 and a driven member 43 includes: a hole 42 formed in the gear 41, the hole having an inner circumferential surface 41a and a plurality of inward protruding parts 42b protrude from the inner circumferential surface 41a toward the rotating center of the gear 41 so that tips 42c have a common radius an outer wall formed on the driven member 43, the outer wall having a plurality of outer circumferential surfaces 43c to be rotatably fitted to the tips 42c of the inward protruding parts 42b of the gear 41 and a plurality of outward protruding parts 43d protruded from the outer circumferential surfaces 43c toward the side opposite to the rotating center of the gear 41 with tips 43e being rotatably fitted to the inner circumferential surface 41a and an elastic member 46 interposed each between the sidewalls 42d of the inward protruding parts 42b and the sidewalls 43f of the outward protruding parts 43d.COPYRIGHT: (C)2013,JPO&INPIT【課題】ブレードのロック時の衝撃により耐久性が低下する虞のない刈り込み機を提供する。【解決手段】歯車41と従動部材43の連結部は、歯車41に形成され内周面41aと内周面41aから歯車41の回転中心側に突出し先端部42cが共通の半径を持って形成された複数の内方凸形状部42bを有する孔42と、従動部材43に形成され歯車41の内方凸形状部42bの先端部42cと回動自在に嵌合する複数の外周面43cと外周面43cから歯車41の反回転中心側に突出し先端部43eが内周面41aと回動自在に嵌合する複数の外方凸形状部43dを有する外壁と、内方凸形状部42bの側壁42dと外方凸形状部43dの側壁43fとの間に介在する弾性部材46とを備える。【選択図】 図4
