Storage Rack with Multiple Tiers

Abstract

A storage rack with multiple tiers includes at least two rack portions and at least a connecting member. The two rack portions include an upper rack portion and a lower rack portion. The rack portions respectively include at least three support beams and at least a rack tier fixed thereon. Two female screw threads are respectively formed on a bottom of the support beams of the upper rack portion and on a top of the support beams of the lower rack portion. The at least a connecting member is connecting the upper rack portion and the lower rack portion. The connecting member includes a handheld portion and two screw portions. The screwing portions are respectively disposed on two sides of the handheld portion and each having a male screw thread thereon. The male screw threads are configured for threadly engaging the female screw threads of the support beams.

1 . A storage rack with multiple tiers comprising:
 at least two rack portions, comprising an upper rack portion and a lower rack portion, the upper rack portion being adjacent to and stacked upon the lower rack portion, each rack portion comprising at least three support beams and a rack tier fixed thereon, the support beams of the upper rack portion being vertically coaxially aligned with the support beams of the lower rack portion respectively, two female screw threads being respectively formed in a bottom of the support beam of the upper rack portion and on a top of the support beam of the lower rack portion; and   at least a connecting member for connecting the upper rack portion and the lower rack portion comprising a handheld portion, two screw portions with male screw threads disposed on two sides of the handheld portion respectively, the male screw threads being configured for engaging with the female screw threads of the support beams.   
   
   
       2 . The storage rack with multiple tiers according to  claim 1 , wherein a plurality of anti-sliding grooves is defined on the surface of the handheld portion and the two screw portions of the connecting member are vertically coaxially aligned to each other. 
   
   
       3 . The storage rack with multiple tiers according to  claim 2 , wherein the male screw threads of the two screw portions have a same screwing direction. 
   
   
       4 . The storage rack with multiple tiers according to  claim 2 , wherein the male screw threads of the two screw portions have an opposite screwing direction and two screw portions have a same length. 
   
   
       5 . The storage rack with multiple tiers according to  claim 1 , wherein the rack portions respectively comprises four support beams and four connecting members. 
   
   
       6 . A storage rack with multiple tiers comprising:
 a lower rack portion having at least three support beams and at least a rack tier fixed thereon, a top end of each support beam defining a screw hole therein;   an upper rack portion being adjacent to and stacked upon the lower rack portion, the upper rack portion having at least three support beams coaxially aligned with the support beams of the lower rack portion and at least one rack tier fixed thereon, two opposite ends of each support beams defining a screw hole therein; and   a plurality of connecting members for connecting the upper rack portion and the lower rack portion, each connecting member having a handheld portion with two screws disposed on two sides of the handheld portion respectively, wherein the screws of each connecting member are engaged in the screw holes of each support beam of the lower rack portion and each support beam of the upper rack portion.   
   
   
       7 . The storage rack with multiple tiers according to  claim 6 , wherein pluralities of anti-sliding grooves are defined in the surface of the handheld portion and the two screw portions of the connecting member are vertically coaxially aligned to each other. 
   
   
       8 . The storage rack with multiple tiers according to  claim 7 , wherein the two screw portions of each connecting member have male screw threads in a same screwing direction. 
   
   
       9 . The storage rack with multiple tiers according to  claim 7 , wherein the two screw portions of the connecting member have male screw threads in opposite screwing directions and two screw portions have the same length. 
   
   
       10 . The storage rack with multiple tiers according to  claim 6 , wherein the lower rack portion and the upper rack portion respectively comprise four support beams and four connecting members.