The automatic coupling device allows the overheight cage (2) to be locked to the container (3) and released from it by a container spreader (1), with the operation of a container spreader twistlock (4) transmitted to the a twistlock (6) of the overheight cage via a counter-piece (5). The coupling between the twistlocks ensures that the container spreader twistlock position corresponds to the position of the overheight cage twistlock, with a signal lamp associated with the container spreader indicating the overheight cage twistlock position.
