Patent ID: 6189695
Filing Date: 2001-02-20
Classification: B65D

Abstract:
An improved structure for foldable storage bins, wherein, each of said storage bins has a square bottom board connectable on the four edges thereof with two pairs of side plates foldable inwardly, wherein, a pair of mutually opposite side plates in said two pairs of side plates each has on both ends thereof an abutting portion protruding inwardly and provided with a plurality of slot mortises, while the other pair of mutually opposite side plates in said two pairs of side plates each has on both ends thereof a plurality of corresponding tenons; when all said side plates are assembled in their upright positions, said side plates with said abutting portions are abutted against said other pair of mutually opposite side plates, and engagement between all said slot mortises with said corresponding tenons forms a firm connecting structure; said side plates are adapted to folding down inwardly till said bottom board thereof, when said storage bin is not in use, it is folded into a pile of stacked plates in favor of carrying and storage; said structure for foldable storage bins is characterized by that,said structure includes upright stop pieces on said four edges of said bottom board to prevent said side plates from falling down outwardly when said side plates are placed upright thereon; said firm connecting structure including said slot mortises and said corresponding tenons are provided for connecting every two of said side plates in order to prevent said side plates from falling down inwardly to increase stability of said side plates in assembling; a plurality of protuberances and engaging recesses are provided at the pivotal connecting areas between said bottom board and the bottom edges of said side plates, so that a pair of mutually opposite side plates in said two pairs of side plates are maintained in its upright position with said protuberances and engaging recesses when they are erected, then the other pair of mutually opposite side plates in said two pairs of side plates are erected under the favor of the stability of the former pair of said side plates; a plurality of small sheets are provided on the external walls of all said side plates at both ends of said storage bin, gaps are left between said small sheets and said external walls to allow insertion of indicating tags to show the contents in said storage bin; an inner frame and an outer frame extend downwardly on the external edges of said bottom board, so that when two storage bins same as said storage bin are stacked with each other, said inner and outer frames on the upper of said storage bins form a groove to engage over said side plates of the lower of said storage bins to increase stability of stacking.