Patent ID: 8851288

Claim:
A collapsible container comprising: a rectangular bottom wall; sidewalls composed of a pair of first sidewalls opposed to each other and a pair of second sidewalls opposed to each other, the pair of first sidewalls and the pair of second sidewalls being pivotally joined to respective outer edges of the bottom wall and being capable of entering a folded state in which the pair of second sidewalls and the pair of first sidewalls are folded on the bottom wall, in this order, and an assembled state in which the pair of first sidewalls and the pair of second sidewalls are raised from the bottom wall, in this order, the assembled state preventing the pair of first sidewalls from falling over on the bottom wall using the pair of second sidewalls held between the pair of first sidewalls; a pair of band plate members extending along upper edges of the pair of first sidewalls; a band plate hinge mechanism joining the band plate members near to top surfaces of the pair of first sidewalls, the band plate members configured to pivot between a horizontal posture of protruding inward from the first sidewalls horizontally and a rising posture of rising upward from the first sidewalls vertically, the band plate hinge mechanism being capable of positioning the band plate members in the horizontal posture, wherein, when the band plate members assume the horizontal posture, the band plate members are displaced lower relative to the top surfaces of the pair of first sidewalls than when the band plate members assume the rising posture, wherein the band plate members assuming the horizontal posture also are displaced between the raised pair of second sidewalls; rising engagement recesses formed by partially notching a corner portion between an upper surface and an outside surface of the pair of first sidewalls; and rising engagement protrusions on an outer edge of a side of each band plate member, wherein the side of each band plate member is laid on the upper surface of the pair of first sidewalls when the band plate members assume the rising posture such that the rising engagement recesses engage with the rising engagement protrusions when the band plate members assume the rising posture and retain the band plate members in the rising posture, thereafter holding the band plate members in the rising posture, and wherein the rising engagement protrusions extend vertically when the band plate members assume the rising posture.