Patent attributes
A combination shelf includes at least four column units, at least two storage layers, and multiple clips. The column unit consists of two parallel, vertical poles on the left and right, and multiple connections connecting the left and right vertical poles. The clip has a vertical groove with a wing located on both sides at the lower halves of the front and rear ends of the groove opening. The grooves of the clips can be embedded by the vertical poles. The front and rear ends of both sides of the storage layer each offers an outward-opening U-shaped fastener. The front and rear edges of the lower half of the fastener each has a top pusher. The fasteners of the storage layer can each cover the exterior of the clips of the column units. The inner faces of the two top pushers each presses the two wings. By fitting together the corresponding bevels of the top pushers and the two wings, the clips and the fasteners press each other and therefore clamping the vertical pole.
