| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging box which is easily and surely closed even when an item to be packaged is stored in the box.SOLUTION: A body 2 is closed by the first-fourth flaps 10, 11, 12, 13. The first flap 10 is formed into a rectangular shape and the fourth flap 13 is into a trapezoidal shape with an engaging protrusion 15 on its tip center and the first inclining sides 14a, 14b on both of its sides. The second and the third flaps 11, 12 includes tip pressing parts 16, 20 for pressing the protrusion 15 of the flap 13 through the flap 10, the second inclining sides 17a, 21a inclining from the pressing parts 16, 20 to the base end, superimposing parts 18, 22 superimposing on the inside of the fourth flap 13, and the third inclining sides 17b, 21b inclining along the first inclining sides 14a, 14b of the fourth flap 13 from the superimposing parts 18, 22 to the pressing parts 16, 20. |
