| 摘要 |
PROBLEM TO BE SOLVED: To improve operativity in rotating a sidewall to be first fallen toward the bottom in folding work. SOLUTION: An elastic member 5c formed on a projection 2c of a sidewall 2 to be subsequently fallen is pushed to bend a locking member 4 protrusively provided on a projection 3c of the sidewall 3 to be first fallen toward a guide block 5b formed on the projection of the sidewall to be subsequently fallen, to cause a locking protrusion 4a of the locking member to separate from the projection of the sidewall to be subsequently fallen. A slope 4b formed on the rear of the locking protrusion of the locking member is brought into contact with a slope 5b1 of the guide block. Then the elastic member is further pushed, thereby causing the locking member with the slope on the rear of the locking protrusion in contact with the slope of the guide block to move in the direction that the locking protrusion comes out of a through hole 5a bored on the projection of the sidewall to be subsequently fallen along the slope of the guide block. COPYRIGHT: (C)2004,JPO
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