| 摘要 |
PROBLEM TO BE SOLVED: To enable a container opening to be closed during its descending operation and to be opened during its ascending operation by a method wherein a shoulder part of the container formed into a tapered shape is formed in such a way that it can be resiliently inverted. SOLUTION: The container is constructed such that a rod 5 is raised from the central part of a bottom wall 3 of the container, a resilient tapered shoulder section 15 which can be inverted is projected in a downward and inward direction through a first thin-walled hinge 14 from an upper end of a barrel part raised from the outer circumference of the bottom wall, a port flange part 17 is projected from the lower end of the shoulder part 15 through a second thin-walled hinge 16, a rod-like member is inserted into the port flange part 17 and raised, a flange 18 projecting in both inward and outward direction is arranged at the upper end of the port flange and then the inward projecting portion of the flange 18 is press contacted with the outer circumferential part of the rod upper surface. |
