Lift installation having a compensating device, so that a first roller is largely relieved of loading when the lift car is at rest

Abstract

The invention relates to a lift installation (1) having a lift car (5) which can be moved along a guide rail (3). The lift installation here comprises at least a first pair (29) of rollers and a second pair (31) of rollers. The guide rail (3) runs between the two rollers (45, 46) of the first pair (29) of rollers and between the two rollers (47, 48) of the second pair (31) of rollers. The lift installation (1) also has an apparatus (19) for subjecting the lift car (5) to a retaining force (21), wherein there is a horizontal offset between the point at which the retaining force takes effect and the centre of gravity of the lift car, and therefore the lift car is subjected to a first torque. In addition, the lift car has at least a first compensating device (63), so that, when the lift car (5) is at rest, the guide rail (3) is subjected to sufficient force to give rise to a second torque, which largely compensates for the first torque, so that a first roller (45) of the first pair (29) of rollers is largely relieved of loading when the lift car (5) is at rest.

Description

technical field [0001] The invention relates to an elevator installation with eccentric means for holding an elevator car. Such lift installations are known, for example, from EP1772413 and EP1818305. With the eccentric means for holding the elevator car, the holding force is not applied centrally to the elevator car. This means that the holding force is neither along the line of the center of gravity (including the vertical line of the center of gravity) nor at the geometric center position or along the corresponding vertical line. Background technique [0002] In this case the elevator installation comprises an elevator car movable along the guide rail, the elevator car having at least a first roller pair and a second roller pair. In this case, the guide rail extends over the two rollers of the first roller pair and between the two rollers of the second roller pair. In addition, the elevator installation has means for subjecting the elevator car to holding forces. In t...

AI Technical Summary

Problems solved by technology

But at high speeds, the stiffer roll material produces noticeable noise

Additionally, the weak cushioning of the stiffer roll material creates an uncomfortable ride because relatively much vibration is transmitted to the elevator car

However, softer roller materials with better cushioning are subject to greater plastic deformation, which in turn leads to loud noise generation and an uncomfortable ride experience

Therefore, rolls with soft roll material may only be suitable for low payloads, or such rolls need to be replaced frequently

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