US Patent 9901169 One piece collapsible shelving unit

A shelving unit movable between a shelf-supporting condition and a collapsed condition includes first and second side support frames pivotally connected to a rear support frame. At least one shelf is pivotally mounted to the rear support frame for movement between a horizontal position supported on the first and second side support frames, and a vertical position removed form the first and second side support frames. The first and second side support frames are folded upon one another forwardly of the at least one shelf in the vertical position thereof and parallel to the rear support frame to form a compact folded, layered, parallel arrangement so that the shelving unit is easy to store and transport.