Cassette gas cylinder mounting structure

摘要

Cylinder mounting mechanism (25) is provided in a working machine (10) for mounting thereto a cylinder case (26) having a cassette gas cylinder (21) accommodated therein. Mouthpiece support section (42) is provided in the mounting mechanism for supporting a mouthpiece portion (61) of the cassette gas cylinder in the cylinder case. Fitting recessed portion (170) is provided in one end portion of the cylinder case (26) and capable of receiving the mouthpiece support section (42), the fitting recessed portion being defined by an inner peripheral wall part (171) of the one end portion that has a tapering wall thickness such that the surface of the wall part slants gradually outwardly toward the distal end (171a) of the fitting recessed portion.