| 摘要 |
PROBLEM TO BE SOLVED: To improve a packing box having reinforcing walls for raising pressure resisting strength.SOLUTION: A packing box 10 comprises a bottom wall 12, end walls 13A, 13B standingly provided on first edges of the bottom wall 12, side walls 15A, 15B standingly provided adjacent to the end walls 13A, 13B, edge walls 20 provided continuously to side edges of the end walls 13A, 13B via outer wall folding lines 21, folded-back walls 25 arranged on inner surfaces of the edge walls 20, inner walls 27 arranged on inner surfaces of the end walls 13A, 13B, and reinforcing walls 26 continuing to the folded-back walls 25 via first folding lines 29 and continuing to the inner walls 27 via second folding lines 30. The reinforced wall 26 projects inward from between the folded-back wall 25 and the inner wall 27, and the first or second folding line 29, 30 between the first and second folding lines 29, 30, which lies closer to an outer wall folding line 21 side than a projecting apex, is arranged at a distance L3 from the outer wall folding line 21. |
