Patent ID: 7503523

Claim:
A system for opening and closing a structural part arranged on a support structure, the system comprising: at least one hinged joint device for flexibly connecting the structural part to the support structure; the at least one hinged joint device being arranged inside the support structure and having an axis of rotation about which the structural part can be pivoted relative to the support structure during opening and closing; a locking arrangement structured and arranged to connect the structural part to the support structure in a form-locking manner when the structural part is in a closed position; and the locking arrangement comprising a tightening mechanism structured and arranged to lock and unlock, with the locking arrangement, the support structure and the structural part, wherein, in the closed position, the locking arrangement is arranged inside the support structure and is arranged to relieve the at least one hinged joint device, and wherein the locking arrangement comprises a chain or belt arrangement structured and arranged to lock a first flange of the structural part to a second flange of the support structure, wherein the chain or belt arrangement is arranged radially outside and around a circumference of the first and second flanges, wherein the first and second flanges respectively comprise opposite facing stop surfaces which contact each other and rest against one another in the closed position, and wherein the first and second flanges respectively comprise first locking surfaces which face away from each other.