| 摘要 |
Provided is an accumulator that prevents foreign matters from entering a space S between a housing and a gas plug that is fitted to a concave portion of the housing. An accumulator (100) includes: a housing (110) having an injection opening (112b) into which pressure gas is injected; and a gas plug (150) occluding the injection opening (112b), and seals the pressure gas in the housing (110) by the gas plug (150) that is welded to the housing (110) with a welding portion (151) of the gas plug (150) being melted, wherein the housing (110) includes: a concave portion to which the gas plug (150) occluding the injection opening (112b) is fitted, and to which the gas plug (150) is welded with the welding portion (151) being melted on its bottom surface (110a); and an inclined surface (110c) that extends from an edge portion of the concave portion toward an outside of the housing (110) such that a distance from a center of the injection opening (112b) increases, and the gas plug (150) includes a flange (152) which makes contact with the inclined surface (110c) in a state of being fitted and welded to the concave portion. |
