Conveyor system for transporting articles in an immersion treatment plant, in which the articles are conveyed through an immersion tank filled with a liquid, comprising a) at least one running rail (16, 18) arranged outside the immersion tank and b) a trolley, wherein the trolley comprises: - a trolley frame (28, 30), - a running gear (32, 34, 38) attached to the trolley frame and supported by the at least one running rail (16, 18), - a swivel shaft, and - a swivel arm (44, 46) which, by rotation of the swivel shaft, can be swivelled about a swivel axis arranged transversely to the at least one running rail (16, 18) and, at an end pointing away from the swivel axis, carries a fastening device for fastening an object to be immersed in the immersion tank to the transport carriage, - a drive comprising a motor for pivoting the swivel arm (44, 46) about the swivel axis, characterised in that the drive further comprises an elongated flexible pulling element (66; 66') and a coupling lever which is rigidly connected to the pivot shaft and projects radially outwards and to which the traction element (66; 66') is connected at one end, wherein the pulling element (66, 66') connects the swivel arm (44, 46) to the motor via the coupling lever in such a way that the swivel arm (44, 46) can be lowered due to gravity and held in a controlled manner by the pulling element (66; 66') and can be raised by means of the motor and the pulling element (66; 66'). a) at least one running rail (16, 18) arranged outside the immersion tank and b) a trolley, wherein the trolley comprises: - a trolley frame (28, 30), - a running gear (32, 34, 38) attached to the trolley frame and supported by the at least one running rail (16, 18), - a swivel shaft, and - a swivel arm (44, 46) which, by rotation of the swivel shaft, can be swivelled about a swivel axis arranged transversely to the at least one running rail (16, 18) and, at an end pointing away from the swivel axis, carries a fastening device for fastening an object to be immersed in the immersion tank to the transport carriage, - a drive comprising a motor for pivoting the swivel arm (44, 46) about the swivel axis, - a trolley frame (28, 30), - a running gear (32, 34, 38) attached to the trolley frame and supported by the at least one running rail (16, 18), - a swivel shaft, and - a swivel arm (44, 46) which, by rotation of the swivel shaft, can be swivelled about a swivel axis arranged transversely to the at least one running rail (16, 18) and, at an end pointing away from the swivel axis, carries a fastening device for fastening an object to be immersed in the immersion tank to the transport carriage, - a drive comprising a motor for pivoting the swivel arm (44, 46) about the swivel axis, characterised in that the drive further comprises an elongated flexible pulling element (66; 66') and a coupling lever which is rigidly connected to the pivot shaft and projects radially outwards and to which the traction element (66; 66') is connected at one end, wherein the pulling element (66, 66') connects the swivel arm (44, 46) to the motor via the coupling lever in such a way that the swivel arm (44, 46) can be lowered due to gravity and held in a controlled manner by the pulling element (66; 66') and can be raised by means of the motor and the pulling element (66; 66').