Structure of a modular shelf rack

Abstract

The structure of modular shelf rack includes two bar-type side racks, which are standing vertically. The single bar-type side rack is made by a single frame rod, and the upper and lower positioning parts are placed on top and bottom of the two side racks with pre-determined heights. There is a lower stationary rack placed between the bottom of the two side racks, and a hook and vertical blocker is placed on both sides of the lower stationary rack. There is also an upper stationary rack, which is placed between the top of the two side racks, and the slip-on positioning parts are placed on both its sides. The slip-on positioning part is placed vertically to connect the top of the two side racks with the bottom and to position the two side racks.

1 . A structure of a modular shelf rack, comprising: 
 a bar-type side rack, standing vertically and formed of a single bar frame, the frame having a top and a bottom of two side racks, each side rack having an upper positioning part and a lower positioning part with pre-determined height, said lower positioning part being a horizontal rod;    a lower stationary rack, placed horizontally between the bottom of the two side bars, a hook and a vertical blocker being placed on two sides of the lower stationary rack, said hook being hooked to the lower positioning part at the bottom of the two side racks, said vertical blocker being placed inside of the two side racks to lean against when the two side racks are standing vertically, said vertical blocker being formed by an outside of two horizontal frames that spaced from top to bottom; and    an upper stationary rack, placed in between the top of the two side racks, a slip-on positioning part being placed on two sides thereof and on a vertical frame of the top of the two side racks to position the top of the two side racks.    
   
   
       2 . The structure defined in  claim 1 , wherein said upper positioning part is a horizontal rod or rail or protruding block.  
   
   
       3 . The structure defined in  claim 1 , wherein the rail is placed between the upper and lower part of the bar-type side rack.  
   
   
       4 . The structure defined in  claim 1 , wherein the upper stationary rack is a frame, being comprised of an external frame bar and at least two internal supporting bars, said two internal supporting bars being placed on external frame bars to form said slip-on positioning part.  
   
   
       5 . The structure defined in  claim 1 , wherein the upper stationary rack is a plate, rectangle through holes being set up on both sides of the upper stationary rack to form said slip-on positioning part.