Shelf, shelf system or partition

Shelf, shelf system or partition consisting of several identical or similar module units connecting elements for connecting said modules to one another, and the module units in each case comprising a U-shaped frame part with base panels which have carrying uprights on each of both end sides and perpendicular to the base panel, said carrying uprights having narrow sides with exposed ends, notches being provided in said narrow sides that correspond to notches of a vertically adjacent module unit and into which the connecting elements are insertable as a means for stacking and connecting module units atop one another in a position, characterized by the following features:

• the notches of the narrow sides are each made as a blind hole that extends perpendicular to the base panel;
• the blind holes are placed centrally or at least almost centrally with respect to the narrow side of the carrying upright;
• on an extension of central axes of said blind holes in the exposed ends of the narrow sides of the carrying uprights, further blind holes are provided in each case on a side of the base panel which is opposite the respective narrow side;
• peg-shaped connecting elements which are insertable into the blind holes for connecting module units together one on top of another and that have, in a central area thereof, a spacer collar with an outer diameter or width that is equal to or less than a wall thickness of the carrying uprights;
• and wherein posts of the connecting elements have, in the central area, molded-on or pushed-on spacer collars that are connected rigidly to one another by a spacer bar.