The invention relates to a conveyor device with at least one first and second conveyor carriage which are arranged one behind the other in the conveyor direction (F), a cross belt conveyor which is formed on at least the second conveyor carriage for conveying material to be conveyed in a cross conveyor direction (Q) oriented substantially transversely to the conveyor direction (F), and a powertrain brake for the cross belt conveyor. An operating device is arranged on the first conveyor carriage and a brake device is arranged on the second conveyor carriage. The brake device assumes the release state when the first and second conveyor carriage are traveling in a substantially straight manner, and the brake device assumes the brake state when at least one of the conveyor carriages is cornering in order to allow a movement of a cross belt of the cross belt conveyor in a cross conveyor direction (Q) when traveling in a straight manner and brake the movement when cornering.