Load measuring device for an elevator installation

摘要

An elevator installation includes an elevator cage with a support construction carrying the elevator cage, wherein the support construction has two beams. Mounted on each beam is a positioning arrangement on which a sensor is positioned, which is part of a load measuring device, wherein the positioning arrangements have material structures. The sensors detect a change in spacing of the material structures from one another, wherein this change in spacing is caused by a change in loading of the elevator cage. Signals of the sensors are processed in an evaluating unit and a signal representing the loading is used in an elevator control.

主权项

1. An elevator installation, comprising:
an elevator cage; a support construction bearing the elevator cage, the support construction including first and second beams each having a horizontally extending beam surface; first and second sensors; respective material structures in each of the beam surfaces of the first and second beams, each of the material structures being bounded by a material separation formed in the respective beam surface, wherein the material separations are formed by at least partly removing or weakening a material of the first and second beams, the first sensor being arranged at the material structure at the first beam and the second sensor being arranged at the material structure at the second beam, a change in spacing at the material structure at the first beam being measurable by the first sensor, and a change in spacing at the material structure at the second beam being measurable by the second sensor, the first sensor detecting a compression of the first beam and the second sensor detecting an expansion of the second beam, wherein the first beam includes two of the material separations each generally in a shape of a capital letter “E” and the second beam includes two of the material separations each generally in a shape of a capital letter “M”.