| 摘要 |
An element fixing device comprises a rail ( 1,1',1'' ) with an upper wall (I 1 ) and lateral walls ( 12,13 ). The upper wall has openings ( 2 ) with a first part which permits the passage of a screw head ( 5 ) for the fixing element and a second narrower section ( 22 ) which permits the sliding passage of a shaft ( 4 ) of a fixing screw, the edges of which serve to grip the screw head on the tightening thereof, the head of the screw being housed between the lateral walls of the rail.
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