| 摘要 |
The invention relates to a locking system for mechanical joining of floorboards ( 1, 1 '), a floorboard having such a locking system and a flooring made of such floorboards. The locking system has mechanical cooperating means ( 36, 38; 6, 8, 14 ) for vertical and horizontal joining of adjoining floorboards. The means for horizontal joining about a vertical plane (F) comprise a locking groove ( 14 ) and a locking strip ( 16 ) which is located at opposite joint edge portions ( 4 a , 4 b) of the floorboard ( 4 ). The locking strip ( 6 ) projects from the joint plane (F) and has an upwards projecting locking element ( 8 ) at its free end. The locking groove ( 14 ) is formed in the opposite joint edge portion ( 4 a) of the floorboard at a distance from the joint plane (F). The locking groove ( 14 ) and the locking element ( 8 ) have operative locking surfaces ( 10, 11 ). The locking surfaces are essentially plane and spaced from the upper side of the projecting strip and inside the locking groove and make a locking angle (A) of at least 50° to the upper side of the board. Moreover the locking groove has a guiding part ( 12 ) for cooperation with a corresponding guiding part ( 6 ) on the locking element ( 8 ).
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