Door closure for refrigeration housing

A slidable door displaceable on a top support rail from a closed position over a door opening to an open position to one side of said door opening, said slidable door comprising a rectangular door panel having door support means in a top edge thereof for displaceable support engagement with said top support rail, guide means provided in a lower edge of said door panel, spaced bearing means secured at predetermined locations adjacent a bottom edge of said door opening and disposed for engagement by said guide means, said guide means having door urging means to displace said door panel adjacent a frame of said door opening to close said door opening, said top support rail being a straight rail secured at an angle with respect to a vertical surface plane of said door opening so that when said door panel is in front of the door opening it closes said opening, and when displaced to said open position to one side of said door opening it is positioned outwardly of said plane of said door opening by said support means to which a top edge of said door is displaceably attached and said guide means to which a lower edge of said door is guidingly engaged, said guide means being a guide channel in said lower edge of said door panel, said channel having opposed parallel guide walls, said guide channel having an inlet end for receiving said spaced bearing means, an inner one of said guide walls having an outwardly angulated end section at said inlet end extending toward said door opening to frictionally engage with a first bearing means to cause said door panel to be urged closer to said door opening, said bearing means being constituted by a first and second guide post having a bearing surface and adjustably secured on an eccentric connection in a floor adjacent a respective one of opposed side edges of said door opening, said bearing surface being a cylindrical side wall of said guide post.