| 摘要 |
PROBLEM TO BE SOLVED: To easily and speedily fold up from one corrugated board a strawberry tray having a cross-shaped middle partition integrally and also having a sufficient structure-strength because engagement is ensured in all the areas where the ends of the sides of the middle partition are in contact with the faces of tray side-walls. SOLUTION: A corrugated board 100 has the form in which, on both sides of the square middle face 1 and via main creases A, left and right side-walls 2 and 3, half-bottoms 4 and 5, and longitudinal partitions 6 and 7 are provided contiguously in that order. In the middle face, a plurality of cutting/erecting slits 12 for erectly forming front and rear side-walls and a lateral partition in a cut-and-erection manner are made parallelly. The left and right side-walls 2 and 3 are provided with erecting auxiliary pieces 13 for aiding the erection. In the areas where the side walls and partitions interfere with each other, fitting slits 17 and 18 are made. Further, the front and rear side-walls are provided with locking pieces 30 having locking holes 31, and the longitudinal partitions 6 and 7 are provided with projecting pieces 35 which are inserted and fitted in the locking holes 31. Notches 34 and projecting pieces 35 which engage with each other are provide in the engaging areas of a middle partition as well. |
