| 摘要 |
PROBLEM TO BE SOLVED: To safely carry out a work for opening a lower opening section of a container and taking out a stored material in the container. SOLUTION: A container 1 is provided with a bottom cover set on a lower opening section 5 of a cylindrical container main body 2 formed of a flexible sheet, and the bottom cover 6 is provided with a release section 8 for opening the one side direction, and one side end on the side opposite to the release section side is stitched on the lower end of the container main body 2 and both left and right side pieces 6b, 6b of the bottom cover 6 are formed into almost the triangle shape or almost into the fan shape with a stitching section as a top.
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