Elevator rope maintenance method
US11465879B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 23, 2018 |
| Grant date | Oct 11, 2022 |
| Priority date | — |
| Expiry date | Sep 5, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B7/1238
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
During a maintenance inspection, an optical rope diameter measuring device is provided at a predetermined position along a path of a wire rope, rope diameter is measured at multiple measuring points while the elevator is driven in test mode, and diameter reduction at each measuring point is determined and stored as a first diameter reduction (S2_S6). During a subsequent maintenance inspection, rope diameter is similarly measured at each measuring point to determine diameter reduction constituting a second diameter reduction (S7_S11). Based on these two diameter reductions, the time at which diameter reduction will reach a predetermined threshold value is predicted for each measuring point, and the earliest time is displayed as a rope replacement time (S12_S14).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.