| 摘要 |
PROBLEM TO BE SOLVED: To provide an assembly-type synthetic resin vessel hardly disconnected even if an impact is applied by assembling neighboring side plates firmly. SOLUTION: An upward engagement part and a downward engagement part are mounted to the side plates neighboring each other when the neighboring side plates are assembled. The upward engagement part comprises: an approximately L-shaped engagement protrusion composed of a base in the same direction as the inner surface of both ends of the inner surface of the foremost folded side plate and an insertion part protruding from the base; and a through-hole formed by forming a notch to a protrusion of a square frame which is mounted on the inner surface of the protrusion protrusively formed by perpendicularly extending the side plate from both ends of the afterward folded side plate. The downward engagement part comprises horizontal and approximately L-shaped protrusions at both ends of the foremost folded side plate, and an engagement plate inward protrusively mounted to the protrusions of both ends of the afterward folded side plate. The thickness dimension of the square frame mounted to the afterward folded side plate is larger than the protrusive width dimension of the engagement plate of the lower engagement part. COPYRIGHT: (C)2011,JPO&INPIT
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