Patent attributes
An object is to provide a container sealing device which can perform an opening of an inner plug with a clear opening feeling. An inner plug 10 is assembled in advance to an upper closure 20 by using a second screwing part 52. At this time, since an assembling interval between a separation part 12 and the upper closure 20 can be adjusted by tip end parts 16t and 20u of a cylindrical part 16 which are first stoppers and the small-diameter cylinder part 20d, the second screwing part 52 can be brought into a lock state of being screwed to the deepest position or a state close to that. In opening the plug, the first screwing part 51 is loosened the second screwing part 52 is tightened, and the separation part 12 can be rapidly and reliably separated from a body part 10b of the inner plug 10.
