| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a joined box capable of reducing transport cost and being used repeatedly. SOLUTION: A groove is formed on the boundary between bottom core paperboard 4 and each side wall core paperboard 5. By raising a plurality of sheets of the side wall core paperboard 5 perpendicularly with respect to the bottom core paperboard 4 along the boundaries of the grooves and putting a lid 3 thereon, a box is completed. By removing the lid 3, each side wall core paperboard 5 is brought down in a horizontal direction, whereby the box is put into a developed state.</p> |
