Foldable accommodating box

A foldable accommodating box comprising a floor which includes a pair of parallel frames each forming a fork pocket and connected to each other, and a sidewall accommodating pocket formed between said frames;

• a pair of end walls pivotally supported on said floor for turning movement between a folded-up position in which they are piled on said floor and an upright position in which they stand up from said floor;
• and a pair of sidewalls capable of being accommodated in said sidewall accommodating pocket in a mutually piled state, so that when said accommodating box has been assembled, said pair of end walls opposed to each other and said pair of sidewalls opposed to each other perpendicularly to the end walls are provided to rise on the floor to form a rectangular parallelepiped shape, wherein each of said sidewalls includes a wall plate formed from a metal plate into a right-angled quadrilateral shape, a frame plate formed from a metal plate into a right-angled quadrilateral piped shape and secured at right angles to an outer surface of an outer periphery of said wall plate, and a plurality of metal bars which are secured to one another and combined into a lattice shape and which are secured to said wall plate and said frame plate on the side of the outer surface of said wall plate, said frame plate being provided with notches ensuring that when said sidewalls are piled on each other in an embraced manner so that their outer surface are opposed to each other, they are piled on each other with said frame plates partially adjoining each other on inner and outer sides.