Storage rack with an extendible shelf structure

A storage rack having at least one storage shelf movable from a storage position to a fully extended position to enable loading and unloading of the shelf, said storage rack comprising a rack having a pair of side frame units of vertical frame members interconnected by transverse frame members, said side frame units being interconnected by additional frame members to form the rack having an open front;

• and at least one movable shelf assembly being disposed in said rack, each movable shelf assembly including a rigid carriage with an open end formed by a pair of side members interconnected by transverse carriage elements, a rigid shelf having side elements interconnected by transverse shelf elements, first mounting means for mounting said rigid shelf for movement in a path in said carriage between a first position received in said carriage and a second position extending out of said open end of the carriage, and second mounting means for mounting said carriage in said rack for movement in a path between a third position retracted within the rack and a fourth position with a portion of the carriage extending out of said open front of said rack, said first mounting means including each of said carriage side members having means including a channel member for forming a pair of vertical spaced horizontal parallel track surfaces and each of the side elements having spaced rollers mounted in horizontally spaced relationship to extend between and engage said track surfaces, said second mounting means including said carriage side members having means including a plate member for forming a pair of vertically spaced, horizontal track surfaces and each of the side frame units having spaced pairs of rollers arranged with the plate member extending therebetween and the roller engaging said track surfaces to support the carriage as it moves between the third and fourth position so that with the shelf in a second position and the carriage in a fourth position, said shelf is completely fully extended from the rack frame to enable loading and unloading the shelf without interference from the rack.

A storage rack having at least one storage shelf movable from a storage position to a fully extended position to enable loading and unloading of the shelf, said storage rack comprising a vertically standing rack having at least one pair of horizontally extending frame members;

• and at least one movable shelf assembly being disposed in said rack, each movable shelf assembly including a rigid carriage with an outer end formed by a pair of side members interconnected by at least one transverse carriage element, a rigid shelf having a shelf surface supported by side elements interconnected by transverse shelf elements, first mounting means for mounting said rigid shelf for movement in a path on said carriage between a first position received in said carriage and a second position with a portion extending past the outer end of said carriage, and second mounting means for mounting said carriage in said rack for movement in a path between a third position retracted within the rack and a fourth position with a portion of the carriage extending past the frame members of said rack, said first mounting means including the side member at each side of the carriage having means forming a first track and the side element having spaced rollers mounted in spaced relation thereon for engaging said track, said second mounting means including each side member of the carriage having means including a plate member for forming a pair of vertically spaced, horizontal track surfaces and each of the frame members having spaced pairs of vertically spaced rollers arranged with the plate member extending therebetween and the rollers engaging said track surfaces to support the carriage as it moves between the third and fourth position so that with the shelf in a second position and the carriage in a fourth position, said shelf is fully extended beyond the frame members of the rack to enable loading and unloading the shelf without interference from the rack.