CLOSING STRUCTURE FOR PRESSURE-RESISTANT CONTAINER, FORMATION METHOD THEREFOR, GAS GENERATOR USING CLOSING STRUCTURE FOR PRESSURE-RESISTANT CONTAINER, AND MANUFACTURING METHOD THEREFOR

摘要

According to an embodiment of the present invention, provided is a closing structure of a pressure-resistant container in which an opening of a metallic cylindrical container is closed by a metallic closing member, the closing member including a closing part, the closing part including a first surface, a second surface on an opposite side to the first surface in a thickness direction, and a circumferential surface part between the first surface and the second surface, and having a same shape as that of the opening and having a size enabling insertion thereof into the opening. The closing structure includes: the closing member that is inserted to be at an inside of the opening of the cylindrical container, with the second surface facing inside of the cylindrical container; an annular deformed part that is deformed, with a peripheral wall part on the opening of the cylindrical container abutting against the first surface of the closing part of the closing member and a first annular corner part at a boundary between the first surface and the circumferential surface part; and a welded part where a contact portion between the first annular corner part of the closing part of the closing member and the annular deformed part is welded from outside.