| 摘要 |
PROBLEM TO BE SOLVED: To provide a hinge cap capable of preventing careless opening of a lid by suppressing increase in air pressure within a cap due to warming by making the inside of the cap into a negative pressure state during capping and capable of securely preventing intrusion of water to the inside of the cap.SOLUTION: An annular swelling part protruded to the outer peripheral surface, a top flat surface continued from the annular swelling part and a top projection cylinder provided to stand on the inner peripheral surface of the top flat surface are provided on an upper part of a lid engagement part of a cap body, a locking recessed part having a lower sealing surface which is fit to the annular swelling part to form a first sealing part and a locking upper surface which abuts on top flat surface of the lid engagement part on the inner peripheral surface of the lower sealing part is provided at the lower part of the inner peripheral surface of an outer cylindrical wall of an upper lid, and an upper sealing surface for forming a second sealing part with the outer peripheral surface of the top projection cylinder and a vertical rib which is suspended above the upper sealing surface to protrude toward inside are provided on the inner peripheral surface above the locking recessed part. |
