Tray fastening devices for modular shelving

Abstract

A shelving assembly includes four spaced apart posts each having a narrow top end and a wide bottom end; a plurality of trays each including four positioning tubes on its four corners adapted to securely sleeve onto the posts; and a plurality of sets of four tray fastening members each including a truncated conic inner sleeve having a first element and a mated second element adapted to matingly engage with the first element for securely sleeving onto the positioning tube; and a truncated conic outer sleeve having a first member and a mated second member adapted to matingly engage with the first member for securely sleeving onto the inner sleeve. Preferably, the inner sleeve is plastic and the outer sleeve is metal. In a case of detaching one or more broken inner sleeves, a user may simply detach one or more outer sleeve(s) prior to removing the broken inner sleeve(s)

1 . A shelving assembly comprising:
 four spaced apart posts each having a narrow top end and a wide bottom end;   a plurality of trays each including four positioning tubes on its four corners adapted to securely sleeve onto the posts; and   a plurality of sets of four tray fastening members each including a truncated conic inner sleeve having a first element and a mated second element adapted to matingly engage with the first element for securely sleeving onto the positioning tube; and a truncated conic outer sleeve having a first member and a mated second member adapted to matingly engage with the first member for securely sleeving onto the inner sleeve.   
   
   
       2 . The shelving assembly of  claim 1 , wherein the inner sleeve is formed of plastic. 
   
   
       3 . The shelving assembly of  claim 1 , wherein the first element comprises a projection on one side and a recess on the other side, and the second element comprises a projection on the other side and a recess on one side, and wherein the projection of the first element is adapted to matingly engage with the recess of the second element, and the projection of the second element is adapted to matingly engage with the recess of the first element. 
   
   
       4 . The shelving assembly of  claim 1 , wherein the outer sleeve is formed of metal. 
   
   
       5 . The shelving assembly of  claim 1 , wherein the first member comprises an upper protrusion on either side and the second member comprises a lower protrusion on either side, and wherein the upper protrusions of the first member are adapted to matingly engage with the lower protrusions of the second member.