PROBLEM TO BE SOLVED: To provide an extendible working machine having a rod part which is lightweight and capable of being extended further long.SOLUTION: An extendible working machine includes a rotation/drive section, a working section, and an extendible rod section which connects the rotary driving section and the working section, and transmits a rotational force to the working section. The rod section includes an extendible tube body and a shaft body which extends in an axial direction in the tube body and is extendible together with the tube body. The tube body includes an outer tube, and an inner tube movable in the outer tube, and the shaft body includes a drive shaft which is rotatably held in the outer tube by a plurality of bearings, and a pipe shaft which is rotatably held in the inner tube. A plurality of grooves are formed in a helical form on the surface of the drive shaft. The pipe shaft is movable in the axial direction along the outer surface of the drive shaft, and the drive shaft is connected with the pipe shaft so as to transmit the rotation of the drive shaft to the pipe shaft.COPYRIGHT: (C)2014,JPO&INPIT【課題】軽量でかつより長く伸ばすことが可能な棹部を有する伸縮式作業機を提供する。【解決手段】回転駆動部、作業部、前記回転駆動部と前記作業部とを連結し、回転力を前記作業部に伝達し、伸縮可能な棹部を備えた伸縮式作業機であって、前記棹部は伸縮可能な管体、および、管体内を軸方向に延び管体と共に伸縮可能な軸体を備えており、前記管体は、外管、および外管内を移動可能な内管を備え、軸体は、外管内に複数の軸受によって回転可能に保持されたドライブシャフト、および、内管内に回転可能に保持されたパイプシャフトを備えており、ドライブシャフトの表面には複数の溝が螺旋状に形成されており、前記パイプシャフトは前記ドライブシャフトの外面に沿って軸方向に移動可能に、かつ、前記ドライブシャフトの回転が前記パイプシャフトに伝達されるように前記ドライブシャフトが前記パイプシャフトと接続されている。【選択図】図2
