Height and inclination adjustable support shelf

Claim 1

A work station comprising a platform and spaced legs supporting said platform, multitrack roller guide means mounted on said legs below said platform, and a shelf having a first pair of rollers and a second pair of rollers spaced forwardly of said first pair of rollers for cooperation with said roller guide means to guide movement of said shelf to selected pulled out heights and inclinations, said roller guide means having lower guide tracks and vertically spaced upper guide tracks for guiding said pairs of rollers during forward movement of said shelf to selected pulled out positions and rearward movement to a pushed in storage position, said lower guide tracks defining said pushed in shelf storage position whereat said shelf is spaced below said platform by a distance sufficient to accommodate the height of a machine supported on said shelf, said upper guide tracks each having a first pair of openings and a second pair of openings spaced forwardly of said first pair of openings to allow said first and second pairs of rollers to be moved into said upper guide tracks, said first and second pairs of rollers being spaced from one another a distance less than the distance between said first and second pairs of openings whereby only one pair of rollers at a time can be switched from said lower to said upper guide tracks upon manipulation of said pulled out shelf about the other pair of rollers, thereby to establish a selected height and inclination thereof relative to said platform, and inclines terminating said upper guide tracks, said inclines extending upwardly and forwardly from the rear edges of said pairs of openings to automatically direct pairs of rollers in said upper guide tracks to said lower guide tracks when said shelf is moved rearwardly toward said pushed in storage position.