Structure of collapsible rack

Abstract

A collapsible rack includes symmetric support frames composed of vertical bars and horizontal bars and top and bottom frames connected between the support frames in a movable manner. The top and bottom frames are composed of connected movable left and right boards, which have front and rear faces that define recessed channels. Spaced fitting holes are defined in the channels. Straight bars form pegs. The top and bottom frames are of movability to allow the top and bottom frames to be collapsed to a stacked flat configuration when the rack is not in use, so as to facilitate storage and transportation. When the rack is to be used, the top and bottom frames are expanded and the straight bars are set to have the pegs fit in the fitting holes defined in the left and right boards to fix the top and bottom frames in the expanded position.

1 . A collapsible rack, comprising:
 a plurality of support frames, each of which is composed of a plurality of vertical bars and a plurality of horizontal bars;   a plurality of the top and bottom frames, which are connected to and between the support frames in a movable manner, each of the top and bottom frames comprising movable left and right boards, each of which has front and rear surfaces that define recessed channels, a plurality of spaced fitting holes being defined in the channels; and   a plurality of straight bars, which have dimensions corresponding to the channels defined in the front and rear surfaces of the left and right boards and form a plurality of pegs corresponding to the fitting holes;   wherein in the rack so formed, the top and bottom frames are of movability to allow the top and bottom frames to be collapsed downward and upward to a stacked flat configuration when the rack is not in use, so as to facilitate storage and transportation and wherein when the rack is to be used, the top and bottom frames are expanded and the straight bars are set to have the pegs fit in the fitting holes defined in the left and right boards to fix the top and bottom frames in the expanded position, so that the top and bottom frames are adapted to receive and support articles positioned thereon.   
     
     
         2 . The collapsible rack according to  claim 1 , wherein the horizontal bars of the support frames have lower edges to which retention bars are mounted to selectively support flat boards thereon so as to form vertically spaced shelves. 
     
     
         3 . The collapsible rack according to  claim 1 , wherein connectors are set to connect between the top and bottom frames and the support frames and between the left and right boards of the top and bottom frames, and wherein the connectors comprise hinges or other openable/closable connection devices. 
     
     
         4 . A collapsible rack, comprising:
 a front frame, which is composed of a plurality of vertical bars and a plurality of horizontal bars, each of the horizontal bars defining spaced fitting holes;   a rear frame, which is composed of a plurality of vertical bars and a plurality of horizontal bars, each of the horizontal bars defining spaced fitting holes;   two side frames, which are connected between the front and rear frames in a movable manner and each comprising movable and connected left and right sub-frames, the left and right sub-frames having inside surfaces to which horizontally extending elongate ribs are mounted; and   a plurality of flat boards, each of which has a bottom forming elongate ribs close to opposite side edges thereof and comprising pegs formed along front and rear edges to correspond to the fitting holes defined in the horizontal bars of the front and rear frames;   wherein in the rack so formed, the front and rear frames and the side frames are of movability to allow the rack to be collapsed into a stacked flat configuration, when the rack is not in use, so as to facilitate storage and transportation of the rack and wherein when the rack is to be used, the front and rear frames and the side frames are expanded and the flat boards are set to have the pegs fit into the fitting holes of the horizontal bars so that he flat boards are securely fixed on the horizontal bars with the elongate ribs mounted to the inside surfaces of the left and right sub-frames serving as stops to hold the boards in position whereby the flat boards are adapted to stably receive articles to be positioned thereon and supported thereby.   
     
     
         5 . The collapsible rack according to  claim 4 , wherein connectors are set to connect between the front and rear frames and the side frames, and between the left and right sub-frames of the side frames in a movable manner, and wherein the connectors comprise hinges or other openable/closable connection devices.