A coupling lock for a docking device for the re-filling, filling or emptying of containers or conveyors, the coupling lock having a locking side and a container side, the coupling lock comprising:
- a pipe nozzle;
- and
- a closing flap that is disposed on the pipe nozzle and is pivotable around an axis, the closing flap having a front side that faces towards the locking side when in a closed position, wherein the closing flap rests along the axis with a partial shaft or partial shaft stump in a bearing that is open to the locking side, wherein the partial shaft or shaft stump is suitable for forming a shaft or a shaft stump when the partial shaft or shaft stump comes into contact with a complementary partial shaft or shaft stump of a further, complementary coupling lock, and wherein the partial shaft or partial shaft stump includes at least one engagement element into which a complementary engagement element is insertable and which is connectable to a drive,
- wherein, in a first alternative, at least one of the partial shaft or shaft stump has a front surface with at least one partially circular guide groove, the opposite ends of which each extend up to a contact surface for a complementary partial shaft or a complementary partial shaft stump of the complementary coupling lock, and the bearing, which is open towards the locking side, comprises at least one guide rail that points to the interior of the pipe nozzle, wherein the guide rail is partially circular and is complementary to the guide groove in the front surface of the partial shaft or partial shaft stump;
- or
- wherein, in a second alternative, the bearing, which is open to the locking side, comprises at least one partially circular guide groove which points to the interior of the pipe nozzle, the opposite ends of which each extend up to the contact surface for a complementary partial shaft or a complementary partial shaft stump of the complementary coupling lock, and wherein at least one partial shaft or shaft stump in the front surface comprises at least one partially circular guide rail which is complementary to the guide groove in the bearing, and
- wherein, in both the first alternative and the second alternative, the guide groove and the complementary guide rail are adapted to engage with each other in a form-fit manner when the closing flap is pivoted from the closed position to the open position, the guide groove and the guide rail comprising form-fit engagement elements that are complementary to each other such that a relative axial movement of a partial shaft or shaft stump and the bearing is prevented.