PROBLEM TO BE SOLVED: To provide a knapsack type power working machine capable of sufficiently reducing moistening of the back of a worker.SOLUTION: The knapsack type power working machine 100 comprises: a knapsack member 1 which is shouldered by the worker and faces his/her back a stand 3 extending rearward from the lower end of the knapsack member 1 a blower 6 mounted on the stand 3 and a back pad member 4 which is attached to the workers side of the knapsack member 1 and contacts the back of the worker. An intake port 9 for sucking air in a space between the blower 6 and the knapsack member 1 is provided to the blower 6, and an air hole 11 penetrating from a workers side to the blower 6 is provided to the knapsack member 1. Thereby, the air in the back pad member 4 can be discharged to the side of the knapsack member 1. The surface of the workers side of the back pad member 4 is composed of an air-permeable material. Thus, moisture generated on the back of the worker intrudes inside the back pad member 4 by a sucking force of the blower 6 and is discharged together with the air inside the back pad member 4.COPYRIGHT: (C)2012,JPO&INPIT【課題】作業者の背中の蒸れを十分に軽減することができる背負式動力作業機を提供する。【解決手段】作業者に背負われ当該作業者の背中に面する背負部材1と、背負部材1の下端部から後方に延びた架台3と、架台3の上に搭載された送風機6と、背負部材1の作業者側に取り付けられ作業者の背中に当接する背当部材4と、を備えた背負式動力作業機100において、送風機6には、背負部材1との隙間の空気を吸引する吸気口9を設け、背負部材1には、作業者側から送風機6側に貫通した通気孔11を設け、背当部材4の内部の空気を背負部材1側に排出可能とし、背当部材4の作業者側の表面を通気性のある素材で構成することで、送風機6の吸引力により、作業者の背中に生じた湿気を背当部材4の内部に進入させ、背当部材4の内部の空気と共に排出する。【選択図】図3
