Trolley transferring concrete slabs from palette rack - uses rocking pivoted arm with beam clamp which swivels 180 degrees after every other pick=up

摘要

The self-propelled trolley (1) travels back and forth on rails (2) to transfer cured precast concrete slabs from a pallet-rack (13) to a flat wagon (14). A beam (15) with a fixed (17) and mobile (18) jaws acts automatically to pick up and deposit a slab, being pivotable about a perpendicular axis (x-x). This arrangement permits compact on edge stacking of slabs with an edge upstand (50), alternate slabs being inverted. Beam pivoting may be effected by a rotary pneumatic jack (53), and may entail a 180 deg. beam rotation after every other pick-up.