| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cardboard box which prevents remarkable deformation on appearance even when a large stacking load is operated.SOLUTION: In a cardboard box, each pair of lateral plates 1 and edge plates 2 are connected via ridge lines in the vertical direction, and outer flaps 3 and inner flaps 4 are connected to upper edges and lower edges of the lateral plates 1 and the edge plates 2 respectively via flap ruled lines 5 as ridge lines in the transverse direction. An oblique ruled line 7 extended in the center part direction of the lateral plate 1 or the edge plate 2 by making the position leaving an interval to the inner side along the flap ruled line 5 from a corner part as the starting point is put into at least either one pair of upper part and lower part among the upper parts and lower parts of each one pair of the lateral plates 1 and the edge plates 2, a step collapsing part 9 is formed in a range from the flap ruled line 5 over the inner side of the oblique ruled line 7 and a step collapsing part 10 is formed from a part between starting points of the oblique ruled lines 7 on the flap ruled line 5 on the outer flap 3 and the inner flap 4. Further, an arcuate ruled line 12 curved in such a direction that an intermediate part approaches the ridge line in the vertical direction over between upper and lower oblique ruled lines 7.</p> |
