| 摘要 |
A carrier for a motor-vehicle roof comprises a bar provided at its ends with two supporting legs which constitute two outer clamping jaws which are for engaging two longitudinal guides secured to the motor-vehicle roof. An inner jaw is pivotally connected to each outer jaw and is moveable between an opened position and a closed clamping position. The bar is provided with a screw for actuating synchronous and symmetrical movements along the bar of two actuating members which are adapted to cause a movement of the two outer jaws towards each other at a first time, until the outer jaws engage the outer lateral surfaces of the two longitudinal guides, whereupon at a second time the two inner jaws are caused to close onto the longitudinal guides, so that clamping of the bar on the longitudinal guides is obtained.
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