Packaging paper box and unfolding body of packaging paper box

摘要

PROBLEM TO BE SOLVED: To provide a developed body of a packaging paper box which exhibits a beautiful box shape while improving assembly workability and stably maintaining a predetermined shape.SOLUTION: A developed body 1A of a packaging paper box formed by folding one sheet 101 includes: a box main body 2 having a bottom wall 8 and three side walls 9, 10, 11 erected from the bottom wall; a lid body 3 having a top wall 12 and three covering walls 13, 14, 15 erected from the top wall; a connecting wall 4 for connecting the bottom wall and the top wall; a pair of first folding pieces 5 continuously formed on both right and left sides of the connecting wall; a pair of second folding pieces 6 arranged between the right and left side walls and the side wall on a front side; and a pair of third folding pieces 7 arranged between the right and left covering walls and the covering wall on a front side. The right and left side walls include bottom-side outer walls 20, 21, bottom-side inner walls 22, 23, upper walls 24, 25, and bottom wall adhering parts 26, 27. The right and left covering walls include top-side outer walls 40, 41, and top-side inner walls 42, 43.