| 摘要 |
PROBLEM TO BE SOLVED: To avoid useless waste of corrugated cardboard and provide effective utilization of natural resources. SOLUTION: A wagon barrel 13 to be unfolded into a rectangular cylinder form and a wagon tray 14 mounted on the wagon barrel 13 formed into the rectangular cylinder shape are stored in outside boxes 11, 12. The outside boxes 11, 12 are inserted into the wagon barrel 13 and utilized as reinforcing legs. It is preferable that this kit stores a bottom plate 15 to be dropped into the wagon tray 14 for use in keeping flat the bottom part of the wagon tray 14 assembled on the wagon barrel 13.
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