| 摘要 |
PROBLEM TO BE SOLVED: To provide a relatively simply structured corrugate cardboard box which offers the most suitable closing lock force. SOLUTION: This relates to a corrugated cardboard box 1. Each right and left pair inside flap 26, 28 is provided with a pair of right and left slits 29 corresponding to a pair of front and back outside flaps 25, 27. The outside flaps 25, 27 are provided with a pair of right and left fitting pieces 30 to be inserted and fitted in the slits 29 corresponding when the outside flaps 25, 27 are folded on the flaps 26, 28. The fitting pieces 30 are provided with a hook part 33 having a draw-in gradient (a tapered face) for the slits 29.
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