| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap which can be opened only by rotating a top cover in a cover opening direction.SOLUTION: In a cap 1 provided with a top cover 2 in the way that it can be screwed to an inside plug 3, a top wall 7 of the top cover 2 is provided with a metatarsus 22. The metatarsus 22 is provided with a base part 22a and an end part 22b, is provided with a bendable part 22c between them, and in the state that the end part 22b is reversed, is in contact with a guide surface provided for an outer peripheral surface at a distal end part 7a of an outlet cylinder 7 of the inside plug 3. In opening, the end part 22b is moved along the guide surface, and a weakened part 12 joining an opening-planned part 13 to the distal end part 7a of the outlet cylinder 7 of the inside plug 3 is cut or broken by the end part 22b, so that opening becomes possible.SELECTED DRAWING: Figure 2 |
