Device for locking building panels, especially floor panels

Team of two building boards (1, 2) which can be joined together and an insert for locking the building panels (1, 2) joined together, in particular floor panels with a core of wood composite, It is provided with plates construction (1, 2) in at least one edge of a groove (4) and on the opposite edge of an elastic tongue (3) which corresponds to the groove (4) being attachable two plates ( 1, 2) together by a horizontal movement assembly and can then interlocked by the tongue-groove joint in a vertical direction (V) and the tab (3) and the groove (4) at least being provided with a recess (5 , 6), the recesses (5, 6) being oriented in the tab (3) and the groove (4) in vertical direction (V), it is essentially facing the recesses when the plates are joined together and fitting the insert (7) in the recesses (5, 6), whereby the plates (1, 2) can be locked in the horizontal direction (H), characterized in that the insert (7) has resilient lips (7 I, 7 II, 7 III, 7 IV) arranged together shaped xy such that the insert (7) can be accommodated in the recess (5, 6) of one of the plates (1, 2) such that by horizontal movement assembly plates can fit into the opposite recess (6, 5) of the other plate.