Patent ID: 9643816
Date: 2017-05-09
CPC Classifications: B66B

Claim:
1. A method for determining the replacement state of wear of a support means of an elevator, wherein the support means is guided over a drive pulley and/or at least one return roller and connects an elevator car with a counterweight, comprising the following steps: providing a control for controlling the movement of the elevator, the control configured to receive call information from the elevator car and from building floors, the control further configured to direct movement of the elevator car to the selected floor and generate call data; connecting an evaluating unit having a memory to the control, the evaluating unit configured to receive call data from the control; dividing the support means into several sections, assigning to each one of the building floors a one of the sections that lies on the drive pulley when the elevator car stands at the corresponding building floor, and assigning an associated memory position in the memory as an alternate bending counter for each of the sections; determining for each of the sections from the call data provided by the control whether the section during a journey of the elevator car passes over the drive pulley and/or the at least one return roller and if so increasing a degree of readiness for discard representing the replacement state of wear correspondingly for the section including counting alternate bending of each of the sections with the alternate bending counters which alternate bending is decisive for a service life of the section with a greatest number of the alternate bendings, wherein determining the degree of readiness for discard includes multiplying each of the alternate bendings by a weighting factor, the weighting factor selected based on at least one of a bending type, a return roller diameter, a looping angle, and a load; generating from the evaluating unit, without checking the support means for a degree of readiness for discard, a service report indicating when the degree of readiness for discard has exceeded a defined value for one of the sections and the support means has to be exchanged; indicating that the support means is ready for exchange when the degree of readiness for discard of one of the sections exceeds the defined value, and taking the elevator out of operation if the degree of readiness for discard for one of the sections exceeds the defined value.