| 摘要 |
PROBLEM TO BE SOLVED: To easily manufacture with machining from only one face by folding a first plane part, a first fold and second plane part into a U-shape so that respective cuts open outward and also folding a third plane part to be placed between the first and second plane parts. SOLUTION: Respective cuts q1, q2, s1 of a corrugated fiberboard material 1 are all cut from a surface, so that they can be easily folded in the same direction. Further, a first plane part P, a plane part q3 of a first fold, and a second plane part R are folded into a U-shape by folding them by 90 degrees so that the respective cuts q1, q2 opened outward. In addition, a third plane part T is folded by opening a cut s1 of a second fold outward, whereby it is folded into the first plane part P and the second plane part R to obtain a three-layered cushioning material made of corrugated fiberboard. Thus it can be used as a cushioning material which can absorb impact from any direction. |
