Cabin of a construction machine having a device for opening and closing a door and construction machine with such a door

The door (17), located in the curved side wall (18) of the vehicle cab, is opened and closed by a slide block (23) on the side of the door travelling along a slideway while it pivots about a vertical axis of rotation passing through the block at the same time as a supporting arm (26) turns on hinges (28, 29) on the top of the door frame and door. A second supporting arm turns about hinges on the lower rear corner of the door and its frame.