Material handling container with openable sidewall

Claim 1

An open top container comprising a horizontally disposed bottom wall, three vertically disposed sidewalls each extending vertically substantially the full height and width of said container and connected together and to said bottom wall to define a storage compartment in said container, each of said bottom and sidewalls comprising a rigid rectangular frame including a plurality of verTically and horizontally disposed bars, a fourth vertically disposed sidewall comprising a rigid rectangular frame including a plurality of vertically and horizontally disposed bars extending substantially the full height of said container but having a width slightly less than the width of said container, continuous guide means, comprising first parallel guide portions disposed interiorly on a pair of said vertically disposed bars at said one sidewall and second parallel guide portions disposed interiorly on a pair of said horizontally disposed bars at the top of said container, slide means secured to opposite sides of said fourth sidewall, a given distance below the top thereof and engaging said guide means to permit movement thereof from its normal, vertically disposed closed position to a horizontally disposed open position at the top of said container and upstanding guide means rigidly mounted on the exterior of the edge of said bottom wall which corresponds to the bottom edge of said fourth sidewall when in its normal vertically disposed closed position, said upstanding guide means having a vertical height less than said given distance of said slide means below the top of said fourth sidewall whereby said bottom edge of said fourth sidewall is received behind said upstanding guide means when said fourth wall is in its normal vertically disposed closed position to rigidly restrain said fourth sidewall against horizontal forces exerted outwardly thereon from the interior of said container, and whereby said fourth sidewall may be raised vertically said given distance to disengage said bottom edge thereof from said upstanding guide means before it is pivoted to said horizontally disposed open position thereof at the top of said container by the engagement between said slide means thereon and said continuous guide means.