1974-07-18
1976-01-20
Spar, Robert J.
214730, B65G 106
Patent
active
039332578
ABSTRACT:
Several stacks of shelves in a warehouse, separated by aisles, are vertically subdivided into a multiplicity of tiers each with a depth of four storage spaces accommodating respective pallet-size loads. At the level of certain tiers of each stack the two inner storage spaces are converted into throughgoing passageways for the manual assembly of fractional orders, these passageways extending parallel to the aisles bounding the respective stack. A stacker crane in each aisle comprises a platform accommodating two pallets in a direction perpendicular to the passageways, the platform supporting a telescoping arm bracketed by a pair of longitudinally extending ledges forming part of an underlying lifting frame; the ledges carry respective transfer blocks allowing for the longitudinal displacement of a pallet from one extremity of the telescoping arm to the other upon an elevation of the lifting frame to raise the pallet off that arm. A pallet can thus be repositioned on the platform during operation of the lifting crane, with extension of the arm into a storage space next to a passageway occurring after the platform has been aligned with the corresponding tier.
REFERENCES:
patent: 3561620 (1969-12-01), Willis
patent: 3608749 (1971-09-01), Zollinger
patent: 3741419 (1973-06-01), Bergerhoff et al.
Dubno Herbert
Johnson R. B.
Ross Karl F.
Spar Robert J.
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