A chairlift has chairs for conveying persons. The chairs may be detachably fastened to a haulage and conveying cable. A closing bar can be moved from a closed position into an open position and is mechanically connected by way of a Bowden cable or the like to a lever which interacts with rails that are arranged at the entry and exit of a station of the cableway system. In order to check whether the closing bar is completely opened or closed, a sensor for detecting the position of the actuating device is arranged in the region of the end of the rails as viewed in the conveying direction of the cable.