| 摘要 |
PROBLEM TO BE SOLVED: To build up a simple packaging utensil by a quite simple operation, reduce the material consumption, make it convenient for storage, and carry it by simply building it up. SOLUTION: A pair of external plates 2 are erected from both side edges of a bottom wall 1, and a pair of internal plates 3 being connected from the end edges of respective external plates 2 by a folding line, are superposed on the internal surfaces of the external plates 2. The internal plates 2 are connected by a diagonal folding line being provided at lower parts of respective internal plates 3, and a pair of end surface surrounding plates 5 which surround both end surfaces, are formed. |
