| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging box having high mechanical intensity with no improvement of materials and no addition of stiffened members, in which flaps at a top section and a bottom section can be sealed without bonding with a bonding member such as an adhesive tape.SOLUTION: A packing box includes side faces having a front side face 11, a rear side face 12, a right side face 13, and a left side face 14; and a top 15; and a bottom 16. The top 15 and the bottom 16 are double structures where inner flaps and outer flaps overlap each other. In the right side face 13, insertion flaps are inserted to insertion holes, respectively, and each bent piece and the right side face 13 form a double structure. Also, in the left side face 14, insertion flaps are inserted to insertion holes, respectively, and each bent piece and the left side face 14 form a double structure. |
