Foldable container

A foldable container comprising:

• a base having a substantially rectangular shape;
• a first pair of opposing side walls, which are hingedly mounted at one pair of opposing edges of said base to pivot between a folded position lying on said base and a standing-up position;
• a second pair of opposing side wails, which are hingedly mounted at one pair of opposing edges of said base to pivot between a folded position lying on said first pair of opposing side walls and a standing-up position and includes flanges extending from both lateral end regions of said second pair of side walls toward said first pair of opposing side walls;
• connecting means for providing toothed engagements between said flanges of said second pair of side walls and the corresponding lateral end regions of said first pair of side walls in the standing-up position, said connecting means having protrusions on said first side walls and corresponding receiving recesses formed on said flanges for receiving form fittingly said protrusions in standing-up position, said protrusions and said receiving recesses engaging each other wedge wisely;
• and
• means for locking the engagements between said first pair of side walls and said second pair of side walls in the standing-up position, said locking means comprises a pair of opposing stopper bars supported on said first pair of side walls in a laterally slidable manner and a spring interposed between facing ends of said stopper bars to resiliently urge said stopper bars toward said second pair of side walls having a recess for receiving free ends of said stopper bars respectively.