| 摘要 |
PROBLEM TO BE SOLVED: To provide a cardboard packing box to which a common production line can be diverted, and in which storage properties and space efficiency of a cardboard sheet after the manufacturing are improved while minimizing the number of parts manufactured, and assembly is facilitated and the strength is also superior. ! SOLUTION: A bumper packing box 1 is a boat-shaped cardboard box for wrapping up a bumper as an object with a shape bent toward longitudinal both side ends. One of joint flaps 121, 221 is bonded to the other so that two pieces of cardboard sheets (first sheet 10 and second sheet 20) are overlapped with each other. These first sheet 10 and second sheet 20 are folded along pre-defined rule marks (scores 11, 21, creases 12, 22, a diagonal rule mark 13, and a horizontal parallel rule mark 14), thereby the box is assembled. Both of the first sheet 10 and the second sheet 20 are formed, for example, by notching the flap of a basic pattern sheet based on a cardboard sheet of the 02 for |
