| 摘要 |
The invention relates to a lift installation (20) comprising a lift cage (21 ), a lift shaft (22) and a drive unit (25), the lift cage (21) being moveably installed in the lift shaft (22) and controlled by the drive unit (25) in su ch a way that it (21) can stop at various positions in the lift shaft (22). Sai d lift shaft (22) is provided with a detection device (29) for detecting wheth er a person is in a critical area (32, 33) of the lift shaft (22) or whether th e person is about to arrive into one such area. The detection device (29) is connected to the drive unit (25) in such a way that the lift installation (2 0) can be switched into a special operating mode if a person is in the critical area (32, 33) or about to arrive into the same. The drive unit (25) comprise s a special control device (30) which, when the lift installation is in the special operating mode, stops the lift cage (21) before it arrives in the critical area (32, 33). To this end, the detection device (29) and the speci al control device (30) are designed in an operationally-safe manner in order to prevent the lift cage (2l) from entering the critical area (32, 33). When th e lift installation is in the special operating mode, the special control devi ce (30) enables the lift cage (21) to be operated in an undisturbed manner in a n area outside the critical area (32, 33).
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