Rack storage system with improved transport vehicle lifting device

A rack storage system comprising

• a first storage rack with storage places for unit loads, wherein the storage places are arranged next to one another in storage planes located on top of each other,
• a second storage rack with storage places for unit loads, wherein the storage places are arranged next to one another in storage planes located on top of each other,
• a rack aisle between the first storage rack and the second storage rack,
• rack guide tracks attached to the first storage rack and second storage rack and arranged in each case in pairs in driving planes located on top of each other,
• at least one automated transport vehicle movable in the rack aisle along the rack guide tracks in order to store the unit loads in the storage places and to retrieve the unit loads from the storage places,
• a transport vehicle lifting device with a vertically extending guide frame and a lift frame mounted on the guide frame so as to be adjustable by a lift drive, wherein a receiving device is arranged on the lift frame, comprises lift guide tracks extending in parallel with the rack guide tracks and positionable relative to the rack guide tracks, and transports the transport vehicle,
• a first guide profile extending essentially parallel to the guide frame and connected to the rack guide tracks on the first storage rack, and
• a second guide profile extending essentially parallel to the guide frame and is connected to the rack guide tracks on the second storage rack,
• a first lift guide track of the lift guide tracks mounted on the lift frame so as to be movable in a direction parallel to the rack guide tracks by a first guide device and is coupled to the first guide profile by a first coupling device, and
• a second lift guide track of the lift guide tracks mounted on the lift frame so as to be movable in a direction parallel to the rack guide tracks by a second guide device and is coupled to the second guide profile by a second coupling device.