Article accommodation case

Abstract

The present invention addresses the problem of providing an article accommodation case that can be formed at low costs, is excellent in connecting workability, and secures high stability in a stacked state. In order to solve the above problem, an article accommodation case having an opening at an upper part thereof and having a substantially cubic shape or a substantially rectangular shape is provided, wherein a convex part serving as a leg part is formed on a bottom-wall lower surface thereof, the convex part being configured to fit into the upper opening of a case below the case when the cases are stacked; inwardly or outwardly protruding upper tongue pieces are formed in a vicinity of upper-end centers of mutually facing side walls thereof; and lower tongue pieces protruding in directions opposite to directions, in which the upper tongue pieces protrude, are formed on the bottom-wall lower surface, the lower tongue pieces engaging the upper tongue pieces of the lower case when the cases are stacked to connect the cases to each other.

1 . An article accommodation case having an opening at an upper part thereof and having a substantially cubic shape or a substantially rectangular shape, wherein
 a convex part serving as a leg part is formed on a bottom-wall lower surface thereof, the convex part being configured to fit into the upper opening of a case below the case when the cases are stacked;   inwardly or outwardly protruding upper tongue pieces are formed in a vicinity of upper-end centers of mutually facing side walls thereof; and   lower tongue pieces protruding in directions opposite to directions, in which the upper tongue pieces protrude, are formed on the bottom-wall lower surface, the lower tongue pieces engaging the upper tongue pieces of the lower case when the cases are stacked to connect the cases to each other.   
     
     
         2 . The article accommodation case according to  claim 1 , wherein concave parts are formed around the upper tongue pieces. 
     
     
         3 . The article accommodation case according to  claim 1 , wherein
 the upper tongue pieces are formed to protrude from upper-end surfaces of the side walls.   
     
     
         4 . The article accommodation case according to  claim 1 , wherein
 the upper tongue pieces have on lower surfaces thereof engagement concave parts respectively, and   the lower tongue pieces have on upper surfaces thereof engagement convex parts respectively, the engagement convex parts fitting into the engagement concave parts of the upper tongue pieces.   
     
     
         5 . The article accommodation case according to  claim 1 , wherein
 the upper tongue pieces are formed on the mutually facing side walls on a long side respectively, and   the lower tongue pieces are formed on the convex part serving as the leg part on the bottom-wall lower surface.   
     
     
         6 . The article accommodation case according to  claim 1 , wherein
 a rectangular lid body that closes the upper opening of the case is provided,   the lid body has on a lower surface thereof a convex part,   the convex part is configured to fit into the upper opening of the case, and   the convex part has tongue pieces that engage the upper tongue pieces formed on the case.