| 摘要 |
<p>A flooring system comprises floorboards (1, 11) mechanical jointed at a joint plane (VP), said floorboards (1, 11) having a core (30), a front side (2, 32), a rear side (34) and opposite joint edge portions (4a, 4b), of which one (4a) is formed as a tongue groove (36) which is defined by upper and lower lips (39, 40). A bottom end (48) and the other (4b) is formed as a tongue (38) with an upwardly directed portion (8). The tongue groove (36), seen from the joint plane (VP), has the shape of an undercut groove. At least the major part of the bottom end (48) of the tongue groove (36), seen parallel with the surface plane (HP), is positioned further away from the joint plane (VP) than is the outer end (69) of the tongue (38). The inner locking surface (45) of the tongue groove (36) is formed on the upper lip (39) within the undercut portion (35) of the tongue groove for coaction with the corresponding locking surface (65) of the tongue (38), which locking surface is formed on the upwardly directed portion (8) of the tongue (38). The lower lip (40) has a supporting surface (50) for coaction with a corresponding supporting surface (71) on the tongue (38).</p> |
