(57) [summary] [purpose] in pill file proof-type cap structure pill file proof skirt upon first opening is removed is communicated from the cap body, the cap body lower end by the disconnection of the pill file proof skirt To prevent the protruding member is left. [Construction] is set to Ren-ra Neru that the pill file proof skirt portion 2 to the cap body 1 when the cap is opened, at the bottom of the wide bridge portion 3A of the weakening band section 4, concave or convex of the reinforcing rib along the bridge portion 6 it was provided. The weakening band portion on the opposite side of the vertical slit 5 of pill file proof skirt, it was forming an acute angle corner portion 4a to be cut starting point of the wide bridge portion.
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