Patent ID: 11912539
Assignee: INVENTIO AG
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for erecting an elevator installation, wherein the elevator installation includes a self-propelled elevator car, a first guide rail strand and a second guide rail strand for guiding the elevator car along a travel path in an elevator shaft, and a drive system having a primary part attached to the elevator car and a secondary part attached along the travel path, wherein the primary part of the drive system has a plurality of driven friction wheels that interact with the secondary part of the drive system, wherein the first and second guide rail strands are used as the secondary part of the drive system, wherein at least two of the driven friction wheels are pressed against each of two opposing guide surfaces of the first and second guide rail strands to drive the elevator car, the method comprising the steps of:
controlling a first rotational speed of the driven friction wheels pressing on guide surface of the first guide rail strand and controlling a second rotational speed of the driven friction wheels pressing on the guide surface of the second guide rail strand;
adjusting the first rotational speed and the second rotational speed independently of one another;
wherein the first guide rail strand lies in a first plane and the second guide rail strand lies in a second plane extending parallel with the first plane, and, in a centered state of the elevator car, a center of the elevator car is located on a center plane extending in parallel with the first and second planes; and
when a deviation of the elevator car center from the center plane is detected, changing at least one of the first rotational speed and the second rotational speed such that as the elevator car moves along the travel path, the elevator car center moves toward the center plane.