Patent ID: 11904705
Assignee: TGW MECHANICS GMBH
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 10:
11. An automated rack storage system, comprising:
a rail line;
at least one storage rack disposed along the rail line;
a storage and retrieval unit movable on the rail line and configured for storing piece goods into the storage rack and retrieving piece goods from the storage rack, the storage and retrieval unit having:
several rail wheels;
a motor control which is electrically connected to at least one rail wheel or a current collector configured for electrical connection of a power-supply rail;
at least one drive motor connected to the motor control; and
a detection device configured to measure a level of a voltage applied to the at least one rail wheel or the current collector and to disconnect a current path between the at least one rail wheel or the current collector and a drive motor of the storage and retrieval unit when the voltage measured is below a threshold value associated with a risk situation;

a power supply electrically connected to at least one of the rail line and a power-supply rail, which is in contact with the storage and retrieval unit; and
a drive control adapted to detect a risk posed by the storage and retrieval unit and to set the at least one of the rail line and the power-supply rail to a normal-operation voltage in a normal operation when there is no risk and to a risk-operation voltage in a risk situation,
wherein the risk-operation voltage is sufficiently high to move the storage and retrieval unit.