Material or article handling – Movable rack having superposed – charge-supporting elements,... – Rack moved vertically by elevating means
Patent
1977-12-07
1980-05-20
Sheridan, Robert G.
Material or article handling
Movable rack having superposed, charge-supporting elements,...
Rack moved vertically by elevating means
414592, 414609, 414277, 414280, 414281, 414285, B65G 100, B65G 4700, E04H 606
Patent
active
042036968
ABSTRACT:
A tray unloading apparatus for transferring trays from a tray transport van to a horizontal in-feed station of a carry-away conveyor for carrying trays to further stations. The unloading apparatus includes vertical pillars which support a set of horizontal parallel tray guide tracks which are disposed essentially parallel to a plurality of vertical sets of tray rails in a tray transport van. The set of tray guide tracks are vertically shiftable along the pillars by a mechanical drive into different height positions corresponding to levels of the transport van rails. The uppermost height position is level with the in-feed station of the carry-away conveyor to receive a tray slid from the tray guide tracks at the upper level. A horizontal continuous belt conveyor located below and between the tray guide tracks is also vertically shiftable as a unit to a plurality of levels equal to the tray levels in the van, and is horizontally shiftable as a unit to be moved between and under any selected level of van tray rails to shift trays from the van to the tray guide tracks. Each time tray or trays at one level are transferred to the guide tracks they are raised to the upper level where a laterally shiftable tray shifter can engage and shift the lifted tray to the carry-away conveyor.
REFERENCES:
patent: 1737762 (1929-12-01), Howe
patent: 2869739 (1959-01-01), Davis
patent: 3719288 (1973-03-01), Schmitt et al.
patent: 3782563 (1974-01-01), Brockmeyer et al.
patent: 3877563 (1975-04-01), Hayashi
Johnson R. B.
Sheridan Robert G.
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