Patent ID: 9580275
Date: 2017-02-28
CPC Classifications: B66B

Claim:
1. An elevator installation including an elevator car, a counterweight, a support device supporting the elevator and the counterweight, wherein the counterweight is connected with the support device by at least one deflecting roller mounted to be rotatable about a rotary bearing and wherein the support device at least partly loops around the deflecting roller, wherein the rotary bearing has a bearing part stationary relative to the counterweight, wherein the bearing part is fixed to the counterweight in a desired position, and a safety device for positional monitoring of the bearing part in the elevator installation, wherein further: the bearing part being an axial body; the safety device being arranged for monitoring a positional deviation of the bearing part from the desired position with respect to the counterweight, wherein the positional deviation is a rotation of the bearing part about an axis of rotation of the bearing part; and the safety device generating an alarm signal if the monitored positional deviation exceeds a predeterminable positional deviation, wherein the safety device includes a detection element for detecting the positional deviation of the bearing part from the desired position and a trigger element for triggering the alarm signal, wherein the detection element and the trigger element are configured and arranged for triggering the alarm signal at least on attainment of the predeterminable positional deviation of the bearing part from the desired position, and wherein the trigger element is arranged in a stationary position in an elevator shaft of the elevator installation.