Patent EP-2520737-A1 (EP)
Inventor: KONSTANCZAK MAREK
IPC: F16B5/00
Filed: 2011-05-03
Abstract: The building panel (1.1) comprises a device (100) for connecting the building panel to similar building panel (1.2) on substrate (11). The lip (15) of a locking arm (14) tapers in the direction of a bottom layer in such a manner that the inner surface of lip is inclined at an acute angle with respect to bottom of locking arm, or to the base surface of building panel (1.1). A locking roller (20) has a flat pressing surface which strikes against the head piece (5.1), during connection of panels, such that the head piece is swiveled in the direction of groove bottom. The building panel comprises a device for connecting the building panel to similar building panel on a substrate, in which the building panel is intended to be lowered against an already installed building panel. Each building panel has mutually opposing profiled side surfaces and abutting surfaces perpendicular to the usable surface or base surface of building panel. A locking arm protrudes over an abutting surface and ends in a trapezoidal lip directed towards the usable surface. A groove (9) has a bottom set back with respect to an abutting surface, and an elongated partly flexible separate connector (2.1) which cooperates with a side surface of opposing building panel (1.2) in the installed state of building panels and partly inserted into the groove. The connector has an approximately gutter-shaped cross-section in the undeformed state, and a partly arched wall (3) comprising a base portion and a leg, in which the partly cylindrical or partly elliptical inner surface of the wall transitions at one edge of the inner surface, into a headpiece, and at a different edge, into a foot (12.1). The foot has a side surface (24) and a base adjoining the side surface. In the installed state of the connector, the head piece points in the direction of usable surface, and the leg which adjoins the base portion and ends in the head piece, is arranged movably so that, when the building panels are joined, the leg can be swiveled together with the head piece in the direction of the groove bottom. A side surface has a locking roller for joining the building panels. The roller transitions into a recess which is open in the direction of base surface. The bottom (35) of the locking arm and the groove, as well as the inclined inner surface of the lip, forms a seat for accommodating the connector. The head piece presses in some sections against a flank of the groove, in the state in which the connector is fitted into the groove. The side surface and the base of the foot of the connector as well as the base portion of the connector facing the bottom of arm are in contact with the inner surface of the lip and the bottom of the locking arm before and after the joining of building panels. The lip of the locking arm tapers in the direction of the bottom layer in such a manner that the inner surface of the lip is inclined at an acute angle with respect to the bottom of the locking arm, or to the base surface of the building panel (1.1). The locking roller has a flat pressing surface which strikes against the head piece, during the connection of two building panels, such that the head piece is swiveled in the direction of groove bottom.