Foldable box for hanging files

A foldable file box for supporting hanging files which have opposed hooks that are accommodated on spaced parallel rails for receiving and holding the hooks on the hanging files, said box comprising:

• a bottom panel;
• a generally rectangular top frame;
• a pair of collapsible side panels respectively hinged to opposite sides of the top frame and to respective opposite sides of the bottom panel;
• a pair of end panels hinged to respectively opposite ends of the top frame, said end panels swinging down to lock the box in an open and erect position and swinging up to enable said box to collapse;
• and
• means integral with the box into which said rails are flexed to be installed and to be removed.

A collapsible plastic box for holding hanging files, each of said files being in the form of a heavy sheet folded back upon itself to form a generally rectangular file receiving pocket, free ends of said heavy sheet having hooks with a distance therebetween, said hooks projecting from its opposing corners, said box comprising:

• four sides and a bottom panel hingedly interconnected to fold from a first and collapsed position to a second and erect position in order to form a generally rectangular box;
• a first two of said sides being hinged to fold onto the bottom panel to provide a compact structural form and to fold into an upright and erect box;
• the other two of said sides being hinged to swing to a position parallel to said bottom panel when said box is in said compact structure form and to swing to a locking position when said box is in said erect form;
• a pair of rail members;
• at least four socket-like rail end support areas integrally formed in opposing and confronting sides of the box at locations corresponding to the positions of the ends of said pair of rail members when said rails are in a spaced parallel relationship and when they are separated from each other by a distance substantially equal to the distance between said hooks for supporting the hanging files within said box;
• and
• means for preventing removal of the rails without deforming them.