| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap which can be put for sealing for reuse without requiring a screwed part while having a pilferproof effect. SOLUTION: The cap 9 comprises a cap main body 10 having a surrounding wall part 12 and a plug 17 which can be inserted into the cap main body 10. The outer diameter of the surrounding wall 12 of the cap main body 10 is practically equal to the inner diameter of a bead 8. While a belt-like annular projected part 16 is formed at the inside of the surrounding wall pad 12, an annular protuberance 18 in the outer diameter slightly larger than the inner diameter of the annular projected part 16 is formed at the plug 17. As the plug 17 is inserted into the cap main body 10 after the cap main body 10 is inserted into an opening 7 of a container 1, making the annular projected part 16 and the annular protuberance 18 engaged with each other, the annular projected part 16 is expanded along an outwardly expanded inner lower part 8b of the bead 8 and pressed against the inner lower part 8b, thereby completing sealing.
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