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A track perpendicular to the roadway is set at the corresponding position of each layer at the front end of the ordinary shuttle racking system. There is a shuttle vehicle that can shuttle back and forth. Shuttle board (ie, sub-shuttle ) can drive into this shuttle vehicle. Shuttles (ie, sub-vehicles) can drive into this shuttle. It can transport the pallet goods to this shuttle vehicle, and it also can carry out instant charging on the shuttle vehicle. This shuttle vehicle is called master shuttle vehicle. The master shuttle vehicle can transport the goods to the lift or conveyor. Such a system is called a sub-master vehicle system. At the same time, the master vehicle can also transfer the sub-vehicles to different roadways. Such a high-density storage system is called a Sub-master shuttle type warehouse.
Through the WMS and WCS control system, the sub-master shuttle type warehouse system realizes fully automatic operation of equipment such as sub shuttle vehicles, master vehicle, lift, and conveyors, eliminating forklift lanes and auxiliary spaces, and greatly increasing the high density of materials in warehouses. The storage saves the time for the forklift to access the materials, reduces the working time of the workers, reduces the work intensity of the workers, and satisfies the customers' requirements for the combination of high-density storage of materials and high-efficiency access.