| 摘要 |
PROBLEM TO BE SOLVED: To provide a bag which overcomes the disadvantages that, since a three-dimensional form is maintained upon use in a conventional bag which maintains the three-dimensional form as an entire form whether or not it is used, accommodated articles are conveniently easily taken in and out, however, since the three-dimension form is also maintained when it is not used, a wide space is inconveniently necessary to keep the bulky bag, and that, in a conventional bag which does not maintain the three-dimensional form as the entire form when it is not used, however, can be compactly folded with low bulkiness when it is not used, a wide space is not conveniently necessary to keep it when it is not used, however, accommodated articles are hardly taken in and out with inconvenience upon its use. SOLUTION: A body part 2a on which a coil spring 2 is wound is provided in the inner periphery of the body part 1a of a tubular body 1 with a bottom made of a flexible material so as to come into contact therewith. The tubular body 1 with the bottom is vertically expansible.
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