Collapsible framework, such as a display stand, and an articulation joint for such framework

A framework according to any of the preceding claims, characterized in that the articulation seats (32) are formed in one (28) of the pieces (28, 30) of the block (12) and are in the form of recesses which are open both to the corresponding cavities (18) an on a face (34) of the said piece of the block (12) which coincides with the separation plane, and in that the other piece (30) of the block (12) has, in the separation plane, flat surfaces (36) which close the outlets of the recesses (32) in the said plane to entrap the pivot pins (24) of the rods (10).

A framework according to any of the preceding claims, characterized in that the block (12) has, at least on its front face (56) remote from its back face (22), at least one profiled peg or button (58, 58a) to which accessories can be affixed.

An articulation joint for a collapsible three-dimensional framework, such as a display stand, the joint consisting of a block (12) of a substantially parallelepipedal shape which has a plurality of cavities (18) each of which is open on a respective side face (20) and on a back face (22) of the block (12), which cavities (18) are adapted to receive the ends of respective rods (10) of the collapsible three-dimensional framework, which are connected to the block (12) by transverse pivot pins (24), and which cavities (18) have respective seats of articulation (32) to receive transverse pivot pins (24) extending from the ends of the rods (10) in diametrically opposite positions,

• characterized in that the block (12) is divided into two pieces (28, 30) which match with each other according to a separation plane which is parallel to its back face (22) and located in correspondence with the seats of articulation (32), and in that the two pieces (28, 30) of the block (12) are secured to each other by releasable fastening means (40, 42) in such a manner as to allow the insertion of the pivot pins (24) of the rods (10) with a movement substantially perpendicular to the separation plane when the two pieces (28, 30) of the block (12) are taken apart, and to entrap the pivot pins (24) in the seats (32) when these two pieces are joined to each other.