Storage system
A storage system comprises a first grid structure of storage cells, each cell being arranged to accommodate a vertical stack of storage bins, the first grid structure having a top level. The system further comprises a first vehicle, arranged to move horizontally at the top level of the first grid structure, and a bin elevator, arranged to convey a bin in a vertical direction between the top level of the grid structure and a delivery station. The first vehicle is further arranged to receive a storage bin from a storage cell at the top level of the first grid structure and to deliver the storage bin to the bin elevator. The bin elevator is arranged to receive a bin from the vehicle at the top level of the first grid structure and to convey the bin to the delivery station. The storage system further comprises one or more additional grid structures of storage cells at a different vertical level than the first grid structure, and additional vehicles that is arranged to move horizontally at the top level of the additional grid structures.
1. A storage system, comprising first and second three dimensional framework structures comprising vertical upright members interconnected by top rails arranged horizontally in two directions such that the top rails form a grid pattern defining a plurality of cells, each cell of the framework structures being at an uppermost level of a column, the grid pattern having an outer periphery defined by a plurality of columns outermost to an interior of the framework structures, wherein a plurality of the cells and columns are storage cells and storage columns respectively arranged to accommodate a vertical stack of storage bins, the first and second framework structures having a plurality of outer, peripheral columns and a plurality of interior columns,
a plurality of wheeled storage bin handling vehicles, arranged to travel along the top rails of the first and second framework structures, the vehicles arranged to lift and lower containers from and into the storage columns and to transport the storage bins about the top rails,
wherein the first framework structure is arranged vertically above the second framework structure, and further wherein
an interior column of the first framework structure and an interior column of the second framework structure, interior to the outer periphery of the grid pattern, are first and second elevator columns respectively, said first and second elevator columns being in vertical alignment with each other, and in which elevator columns a bin elevator having a vertically movable platform is arranged to travel vertically between the first and second framework structures, the bin elevator arranged to receive storage bins directly from the vehicles and transport the bins vertically between the first and second framework structures as well as to a delivery station, the elevator being accessible by vehicles of the first framework structure and vehicles of the second framework structure at the top level of the first and second framework structures respectively.
2. A storage system according to claim 1 , wherein the first and second framework structures are arranged on separate floors or mezzanines in a building.
3. A storage system according to claim 1 or 2 , comprising two sets of vertically aligned first and second elevator columns, the two sets arranged adjacent to a common vertical support column for the framework structures.