Dock device, particularly for maintaining and overhauling aircraft

Dock device for maintaining and overhauling a commercial aircraft having a longitudinal axis, said dock device comprising at least two lateral dock parts spaced from one another to form an area of passage for an aircraft, each lateral dock part being connected by a suspension device to a supporting framework installed above the area of passage so as to form a supporting portal structure which, is positioned in the area of passage, is displaceable in the direction of the longitudinal axis of the aircraft, the lateral dock parts each having a moveable bridge part such that, when the bridge parts are moved apart from one another, the area of passage is cleared between the lateral dock parts and, when the bridge parts are moved toward one another, a bridge deck is created between the lateral dock parts.