| 摘要 |
PURPOSE: To enlarge an effective capacity of a bag and eliminate the necessity of reinforcement on a hollow part of the bag by one threading and an energizing member being movable together to the other threading and the energizing member being movable to the other threading. CONSTITUTION: By revolving a cap 50, a torque is transmitted from the first threading portion 70 to the second threading portion 72, then to an energizing member 26. On the other hand, the energizing member 26 is intercepted in revolution by a guiding projection 28. And because the outside threading part of the threading portion 72 has larger area than the inside threading part of the threading portion 70, a friction resistance between the energizing member 26 and the threading portion 72 is larger than the friction resistance between the threading portion 72 and the threading portion 70. The threading portion 70 revolves against the threading portion 72, and the threading portion 72 and the energizing member 26 move against the threading portion 70 as one body unit. An elastic energy storing portion 32 is compressed and contents are pressed in the bag 24, and discharged by opening operation of an operation valve 16. Then, above operation is repeated. |
