| 摘要 |
PROBLEM TO BE SOLVED: To prevent a load from being applied to an elastic piece formed in a storage recessed part formed in the other side wall which is folded after one side wall to prevent the elastic part from being damaged. SOLUTION: A storage recessed part 2c formed with an elastic piece 2e is formed in the other side wall 2 which is folded after one side wall. A stopper block member B, to which the one side wall folded first contacts, is configured to be accommodated in the storage recessed part in the state where the side walls are assembled in a box shape. In the state where the side walls are assembled in the box shape, when an external force is applied to the one side wall 3 folded first, the one side wall folded first contacts the stopper block member accommodated in the storage recessed part formed in the other side wall folded after the one side wall. The load is not applied, therefore, to the elastic piece formed in the storage recessed part formed in the other side wall folded after the one side wall. COPYRIGHT: (C)2010,JPO&INPIT
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