| 摘要 |
PROBLEM TO BE SOLVED: To provide a set-up box with an intermediate partition, capable of preventing the engagement of a folding bottom from being disengaged or an adhering portion of the folding bottom from being damaged due to the interference of component materials at the time of setting up a folding box from a flate state thereof. SOLUTION: Lower inner sheets 11, 14 forming a bottom of a folding box are shaped in the form of an irregular quadrilateral, respectively, and one of three corresponding internal angles in the lower inner sheets is made smaller than those of the others, respectively. When a folding bottom is to be opened, a timing at which each of respective top ends 27, 33 of two bottom sheets 24, 30 intersects each of respective mating sides 12, 15 of the lower inner sheets 11, 14 is caused to lag so as to eliminate mutual interference. Thereby, such a jumping phenomenon that one of the bottom sheets jumps out on the other bottom sheet is prevented, and diagonal bolt lines with cutting edges on the folding bottom are covered with protruding portions 13, 16 of the lower inner sheets, thereby preventing the folding bottom from being cut off. |
