| 摘要 |
PROBLEM TO BE SOLVED: To provide a stopper device wherewith a cap is prevented from loosening when being put for closing while becoming convenient on opening and effectiveness of tamper evidence can be ensured. SOLUTION: In a stopper device composed of a container 21 and a cap 1, the cap 1 comprises a cap main body 4 having a top 2 and a drum 3 and a movable seal member 5 arranged at the inside of the cap main body 4 while the movable seal member 5 is equipped with a base 13 movable in the circumferential direction against the top 2 and an internal seal 14 to be fitted into a mouth 21a of the container, and the container 21 comprises an annular bulging part 23 formed at a position below an external thread 22, and a push-down part 24 having a slope bulging gradually downward toward the direction of opening the cap for pushing down tabs 11 at the time of opening is formed at the annular bulging part 23. |
