| 摘要 |
PROBLEM TO BE SOLVED: To prevent a cutting score from being broken when a plug is driven into a container and further prevent shower water from entering when shower cooling is performed after high temperature filling in the case that a cap in which a threaded lid is threadably engaged with the plug in advance and the lower end of the threaded lid is abutted against an outer upper surface of a fitted top wall is installed at an opening of the container filled with the content by driving the plug into it. SOLUTION: An inner cylinder 11 having a female threaded segment 11a and an outer cylinder 12 having a holding segment 12a form a side surface of a threaded lid 7. During fastening operation, a lower end surface 11b of an inner cylinder is abutted against the upper surface of a fitting top wall 5 of the plug, a tapered surface 12b inside the lower end of the outer cylinder 12 is abutted against a tapered surface 5a outside the fitting top wall 5 through an annular sealing protrusion 13 and then the lower end surface 12c of the outer cylinder 12 is not abutted against an upper end surface 4a of a fitting outer cylinder 4. |
