| 摘要 |
The rack comprises a sub-frame (5,6) having clamps (7) for releasable attachement to the roof of a vehicle. The sub-frame carries front and rear ladder support assemblies (8,9) each comprising transverse rollers (25,26 and 64,65) for engaging the stringers of a ladder spanning the two assemblies. The rear support assembly (9) comprises a ladder-retaining member (27) pivotable about a transverse axis (22) from a lowered inoperative position to a raised rung-engaging position. The ladder-retaining member (27) is operated by a handle (40) pivotted at one side of the rear support assembly (9). |
