Crank support that can be attached to the drawbar of a trailer and safety device

A protective device formed by a cover that can cover an end face of a stand pipe (3) of a hand crank support (1) that can be fastened to a trailer, and to which a U-shaped arm (10) in cross-section adjoins, which is provided with at least one locking element (15) for form-fitting connection with the crank arm (7) of a hand crank (2) arranged on the end face of the stand pipe (3).