Component piece system, particularly laminar or flat form component piece, has immobilized expansion unit at side surfaces, where expansion unit is conveyed with or after connection of component pieces

摘要

The component piece system (1) has an immobilized expansion unit (10a) at side surfaces (4,5). The expansion unit is conveyed with or after the connection of the component pieces (2,3) by activation of a non-expanded initial state in an expanded locking state. The outlines of the side surfaces are formed such that a form fit or friction fit connection is formed between the side surfaces by the expansion unit in the locking state.