| 摘要 |
PROBLEM TO BE SOLVED: To make disposal by incineration possible together with a container after use by a method wherein both sides of an opening/shutting passage body made of a soft sheet is held from both sides with a pressing leaf spring formed by folding up a long piece while the passage body is made to penetrate through a slit formed at a bent part of the pressing leaf spring, and the front end of an extended part of the side of the pressing leaf spring is engaged with opposite end parts. SOLUTION: The upper end of a passage body is inserted into a slit 8, and the passage body is held from both sides with a pressing leaf spring 6 folded up on a pressing leaf spring 5. A turned-up part 7 at the front end of the pressing leaf spring 6 is tucked in to the lower end of the pressing leaf spring 5 and en engaging piece 10 formed at the front end of a traction means 9 formed by extending the pressing leaf spring 5 is engaged with the other end of the pressing leaf spring 5, and fabrication is made up therewith. In an opening/shutting mechanism fabricated as mentioned above, the passage body is held in a circular arc shape, being put in the state of being curved, as the pressing leaf springs 5 and 6 curve, and the circular arc shape is kept with the traction means 9 being put in the position of chord. Thereby, the curved shape can be kept certainly even though a shape-keeping force of the pressing leaf springs 5 and 6 is weak, and the passage body can be pressed firm. |
