Patent ID: 8616575

Claim:
Fifth-wheel coupling ( 1 ) comprising: a fifth-wheel coupling plate ( 2 ), on which an entry opening ( 4 ) for a kingpin ( 5 ) is disposed; a locking device ( 100 ) for fixing the kingpin ( 5 ) in place; a fixation element that is laterally movable from a locking position into an open position and vice versa, wherein the fixation element projects into the entry opening in the locking position and engages on the locking device ( 100 ); and a security device ( 15 ) having a blocking element ( 40 , 400 ) that is laterally movable from a rest position into a blocking position, and vice versa; wherein the blocking element ( 40 , 400 ) projects into the entry opening ( 4 ) at least in the blocking position, and the blocking element ( 40 , 400 ) is fixed in place in the blocking position when the fixation element is in the open position in unauthorized manner.