An object of the present invention is reducing the weight of the gear case 30, to provide a brush cutter that was secured over the optimal meshing state by a small-diameter bevel gear 41 and the large gear 44 to a long period of time in the gear case 30. The gear case 30 of the A Kari device 10 is made of plastic or light metal, while maintaining a constant interval and a guide roller 60 which is located on the back side in the parallel of the small-diameter bevel gear 41 and the large gear 44, to remain sandwiched between the large gear 44, optimum engagement with the small-diameter bevel gear 41 and the large gear 44, even when the power transmission, as is ensured for a long time, both the umbrella Each base of the supporting shafts 40, 45 of the gears 41 and 44, as well as connected by the connecting member 62 and is held to the gear case 30 in a state of being interposed between the spacer plates. .BACKGROUND【課題】ギヤケース30の軽量化を図り、ギヤケース30内における小径傘歯車41と大径傘歯車44とによる最適な噛合状態を長期間に亘って確保した刈払機を提供する。【解決手段】刈払装置10のギヤケース30をプラスチック製又は軽金属製とし、小径傘歯車41と大径傘歯車44の背面側に位置するガイドローラ60とを平行で一定間隔を保った状態で、大径傘歯車44を間に挟んだ状態を維持させ、小径傘歯車41と大径傘歯車44による最適な噛合が、動力伝達時においても、長期間に亘り確保されるように、双方の傘歯車41,44の支持軸40,45の各基部を、連結部材62で連結するとともに、スペーサ板を間に介在させた状態でギヤケース30内に保持させた。【選択図】図6
