Locking system for a closing flap

A closure system for a closing flap on a transport container having a container frame that is placed onto a docking frame in a fitting manner at an unloading station, with a rotary device for moving the closing flap, said closure system comprising

• a flap shaft acting axially at one end with respect to an axis of rotation of the closing flap, the other end of the flap shaft being mounted rotatably in the container frame and being a first connecting element,
• the first connecting element being axially coupled by a rotationally fixed pairing of a tongue in a groove to a second connecting element, the second connecting element being mounted in the container frame, and being axially displaceable,
• an axially acting compression spring being arranged between the first connecting element and the second connecting element such that the first connecting element and the second connecting element are pressed apart,
• in the closed position of the closing flap, the second connecting element engaging a rotationally fixed element and, for opening of the closing flap, the second connecting element being displaced in an axial direction, with the second connecting element being disengaged from the rotationally fixed element,
• the rotary device being provided on the docking frame and being secured on a displaceable support such that, in an inoperative position of the transport container, with the container frame on the docking frame, a drive shaft of the rotary device and the flap shaft lie on a common axis, and
• to move the closing flap, coupling elements fit together in an interlocking manner and are present on the second connecting element and on the drive shaft, the coupling elements being coupled to or decoupled from each other by displacement of the support of the rotary device, the second connecting element being axially displaced in the coupled position and being decoupled from the first connecting element.