Rack assembly joint

Abstract

A rack assembly joint aims for assembly of a plurality of shelves. Each shelf has four corners at two lateral edges and four insertion rods respectively protruding from the four corners toward two sides. The rack assembly joint includes a main body, a first coupling structure and a second coupling structure. The main body has a first coupling end and a second coupling end perpendicular to each other. The first coupling structure and the second coupling structure are located respectively on the first coupling end and the second coupling end, and include respectively at least two first coupling round holes and two second coupling round holes to form compact coupling with the insertion rod. Thus a selected number of the rack assembly joints and the shelves can be chosen to assemble an assembly rack.

What is claimed is: 
     
         1 . A rack assembly joint for coupling with a plurality of shelves to form a rack, each shelf including four corners at two lateral edges and four insertion rods respectively protruding from the four corners straightly toward two sides thereof, comprising:
 a main body including a first coupling end and a second coupling end perpendicular to each other;   a first coupling structure which is located on the first coupling end and includes at least two first coupling round holes to form compact coupling with the insert rod; and   a second coupling structure which is located on the second coupling end and includes at least two second coupling round holes to form compact coupling with the insert rod.   
     
     
         2 . The rack assembly joint of  claim 1 , wherein each of the first coupling round holes and the second coupling round holes includes a latch rim inside to clamp the insertion rod. 
     
     
         3 . The rack assembly joint of  claim 1 , wherein the main body includes a first flank plate and a second flank plate that are connected thereon and extended outward transversely in the directions of the first coupling round holes and the second coupling round holes. 
     
     
         4 . The rack assembly joint of  claim 1  further including a third coupling structure, and the main body further including a third coupling end opposite to the first coupling end at a rear side thereof, the third coupling structure being located on the third coupling end and including at least two third coupling round holes to form compact coupling with the insertion rod, the second coupling round holes including at least three sets. 
     
     
         5 . The rack assembly joint of  claim 4 , wherein each of the first coupling round holes, the second coupling round holes and the third coupling round holes includes a latch rim inside to clamp the insertion rod. 
     
     
         6 . The rack assembly joint of  claim 4 , wherein the main body includes a first flank plate, a second flank plate and a third flank plate that are connected thereon and extended outward transversely in the directions of the first coupling round holes, the second coupling round holes and the third coupling round holes. 
     
     
         7 . The rack assembly joint of  claim 4  further including a fourth coupling structure, and the main body further including a fourth coupling end opposite to the second coupling end at a rear side thereof, the fourth coupling structure being located on the fourth coupling end and including at least three fourth coupling round holes to form compact coupling with the insertion rod, the first coupling round holes, the second coupling round holes and the third coupling round holes including respectively at least three sets. 
     
     
         8 . The rack assembly joint of  claim 7 , wherein each of the first coupling round holes, the second coupling round holes, the third coupling round holes and the fourth coupling round holes includes a latch rim inside to clamp the insertion rod. 
     
     
         9 . The rack assembly joint of  claim 7 , wherein the main body includes a first flank plate, a second flank plate, a third flank plate and a fourth flank plate that are connected thereon and extended outward transversely in the directions of the first coupling round holes, the second coupling round holes, the third coupling round holes and the fourth coupling round holes.