| 摘要 |
The invented fastening set comprises at least two parts, a lower part (13) and an upper part (12), which have mutually assigned attachment holes (14, 15) with greater length than width thereof, and a fastening element having a lower part (5) being longitudinal perpendicular to axis of rotation and whose width is always less than width of the attachment holes (14, 15) of the parts (12, 13), with a shank (4), the width of which is less than the width of the attachment holes (14, 15), and with a head (1) for bearing and pressing against the upper part (12). Distance between upper side of the lower part (5) and bottom side of the head (1) corresponds to total thickness of the lower part (13) and the upper part (12) at the spot of joining. The lower part (13) has the form of a profiled C-shaped rail that contains the attachment hole (15) being arranged between resilient arms (21) of the profiled rail. The shank (4) cross section length is greater than the width attachment holes (14, 15) of the upper part (12) and the C-shaped profiled rails and two opposite edges of the shank (4) are provided with fillets (20).
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