Patent ID: 7908816
Filing Date: 2011-03-22
Classification: E04B,E04F,F16B

Abstract:
1. A device for connecting and locking building boards comprising a top side and a bottom side, having a core made of wood material and provided with a groove on at least two opposite side edges, comprising an insert intended for locking purposes, which insert can be inserted into the groove of one of the side edges, the boards being connected by substantially horizontal displacement one toward the other, wherein the insert is provided with one resilient lip extending upward from a first side edge directed toward the top side of the insert, and another resilient lip extending downward from a second side edge directed toward the bottom side of the insert, and wherein at least one of the one resilient lip and the another resilient lip compresses toward a center of the insert and then springs back out from the center of the insert when the boards are connected by the substantially horizontal displacement, the insert comprises: the first side edge comprises the second upward facing surface and the first downward facing surface; the second side edge comprises the first upward facing surface and the second downward facing surface; the one resilient lip extends upward from the second upward facing surface; and the another resilient lip extends downward from the second downward facing surface, wherein each resilient lip has a tip running obliquely to the top side and bottom side, which tip, for locking, cooperates with an obliquely running edge, the insert is plastic, the insert has in its core at least one cavity at a center of the insert, the angle of inclination between the obliquely running edge measures between 90° and 135°, the thickness of the insert measures 1.5-5 mm, the depth of penetration of the insert into the groove is 3-8 mm, and the flexural modulus of the plastic is 1000-7000 N/mm