Monitoring device for detecting an undesired travel of an elevator cab from a standstill

An electromechanical monitoring device (12) is proposed for detecting an undesired travel of an elevator cab (3) from a standstill. The electromechanical monitoring device (12) for detecting an undesired travel of a elevator cab (3) from a standstill comprises a follower wheel (13), which, if required, is pressed against a running path (14, 8, 25) of the elevator cab, preferably against a running diameter (25) of the speed limiter. A sensor (15) detects a rotation of the follower wheel (13) and actuates a brake device (9, 10, 11) when a rotary angle of the follower wheel (13) exceeds a predetermined value. This electromechanical monitoring device (12) is suitable for being fitted to or installed in a speed limiter (24) and is suitable for retrofitting on elevator installations.