| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a corrugated board packing box which forms buffer material in all directions of six surfaces and, at the same time, facilitates a housing operation although the folding-back is simple.SOLUTION: In a buffering flap 16-4, when the folding-up is annularly performed such that the cross-section becomes such a substantial triangle that the tip side returns to a lateral surface (left lateral surface 14) of the root, one surface of the triangle of the tip side forms a bottom surface 16-4-1 which comes to substantially parallel to an opening surface and, when respective surfaces which continue to the side of the root from the bottom surface are made to be a first surface 16-4-2 and a second surface 16-4-3, two lines of gaps C-11, C-12 which are substantially parallel to each other are formed so as to be orthogonally crossed with an edge E-11 on which the first surface 16-4-2 and the second surface 16-4-3 come into contact with each other. A corner formed by the edge E-11 on which the first surface 16-4-2 and the second surface 16-4-3 come into contact with each other between the two lines of gaps C-11, C-12 is folded into the inner side of the triangle. Then, a recess D-11 is formed on a folded portion. The recess D-11 is called as a first bottom side support part.</p> |
