Abstract: A rolling device is provided for opening and/or closing a door, having a rolling unit which can be connected to a fastening element to be fastened to the door, by means of a connecting element. The rolling unit has a drive unit which has at least one power accumulator and a drive, and which is connected to a wheel unit that has a drive wheel. The drive wheel, in the mounted operative position of the rolling device, is in frictional contact with a floor surface contiguous to the door. The drive unit together with the power accumulator and the wheel unit are immobilized on the rolling unit, the rolling unit being received so as to be freely mobile under the influence of its proper weight by means of a linear friction bearing formed between the connecting element and the fastening element.

Abstract: A device for opening and closing a door is provided, with a rolling device having a shell-shaped housing assembled from two complementary housing parts and in which a driving device is arranged, which is connected via a drive shaft to a driving wheel which, in a fitted operating position of the rolling device, is in frictional contact with a rolling surface facing the driving wheel. A fixing body is arranged on a housing part, which together with an opposite fixing body on the other housing part, form a fixed bearing for the drive shaft, each fixing body further having a recess forming a bearing seat for a bearing of the drive shaft. A housing part has linear guide means for connection to corresponding linear guide means of a fastening element. The linear guide means are arranged adjacent to the bearing seat. A method for installing such a device is also provided.