Inventio Ag

Florian Dold

Ernst Ach

Volker Zapf

Claudio De Angelis

Adolf Bissig

Manfred Wirth

Philippe Henneau

Alessandro D'Apice

Oliver Berner

Tobias Noseda

Adrian Steiner

Guntram Begle

Herbert Bachmann

Roland Lorenz

Daniel Meierhans

Urs Lindegger

Marcus Junig

Wolf Neumann-Henneberg

Philipp Müller

Philipp Bürgi

Andreas Egger

Gian-Reto Petruzzi

Alessandro D'apice

Reinhard Glienke

A method and an apparatus monitor the physical state of a suspension means that is connected to an elevator car and can move the same. The support means has markings along its length that divide the support means into segments. The strain difference of the suspension means is monitored segment by segment using a first strain at a first load and a second strain at a second load being determined by a signal processing unit from a distance between two selected markings detected by a detection device, and a strain difference representing the elastic behavior of the segment is calculated from the two strains, wherein the load acting on the suspension means between the two selected markings is measured by a load measuring device.

Determination of the state of a suspension means

A method and a monitoring device determine a wear state of components such as a cable-like suspension means, a traction sheave of a drive machine and deflection rollers of a suspension means arrangement of an elevator system. The method comprises at least the following steps: monitoring an actual time curve of a first parameter which correlates with the wear state of at least one first monitored component of the components; comparing the actual time curve of the monitored first parameter with a predetermined expected time curve of the first parameter; and determining the wear state of the monitored component based on a result of the comparison.

Method for determining a wear state of components of a suspension means arrangement of an elevator system

A pulley for guiding a belt for carrying a car and/or a counterweight of an elevator system has a plurality of peripheral, axially spaced channels for receiving ribs of the belt. Each of the channels has two opposing channel flanks for force transmission by frictional engagement with one of the ribs and a peripheral groove between the two channel flanks. A width of the groove is at least 25 percent of an axial spacing of the channels and at least 80 percent of a height of the channels.

Pulley for guiding a belt for carrying a car and/or a counterweight of an elevator system

A roller for an elevator system has a roller body made of a metal material and a shell made of a POM material forming a running surface of the elevator roller. The shell and the roller body each have a wave profile running in a circumferential direction on a shared contact surface, wherein the shell has, on the running surface, a V-ribbed profile aligned with the wave profile of the roller body that has a rib spacing which substantially corresponds to a wave spacing of the wave profile. The elevator roller is manufactured using a molding process.

Elevator roller for an elevator system, elevator system having at least one such elevator roller, and method for producing an elevator roller

An elevator system includes at least one car and at least one counterweight. At least two support means having different physical properties are arranged between the at least one car and the at least one counterweight.

Elevator system comprising a plurality of differing support means

An elevator system includes a car and/or a counterweight connected to a belt having a plurality of ribs. The elevator system further has at least two deflecting elements over which the belt is guided and which each have a plurality of grooves. The grooves of at least one of the deflecting elements are configured with geometries that differ from the grooves of another of the deflecting elements. The belt has longitudinal ribs that cooperate with the grooves.

Elevator system comprising deflecting elements having different groove geometries

A suspension member arrangement for an elevator includes a suspension member having a plurality of electrically conductive load-bearing cords commonly embedded in an electrically isolating matrix material, a first connector and a second connector each attached to the suspension member and electrically contacting the cords within the suspension member in a contacted end region thereof. The first connector electrically contacts and electrically interconnects in parallel a first group of the cords being a first plurality of directly neighboring ones of the cords. The second connector electrically contacts and electrically interconnects in parallel a second group of the cords being a second plurality of directly neighboring ones of the cords. The suspension member arrangement facilitates electrically contacting the cords of the suspension member using a simple type of connector whereby deteriorations in characteristics of the suspension member can be electrically detected with high accuracy.

Suspension member arrangement for an elevator and monitoring arrangement for monitoring a suspension member

A method for detecting a deterioration state in an elevator suspension member including electrically conductive cords uses a multiplexing unit (MU) to apply first and second alternating voltages to proximal ends of first and second groups of the cords respectively and connect the proximal end of a third group of the cords to a voltage measurement arrangement connected to a reference potential. Distal ends of the groups are connected together. A first neutral point voltage between the third proximal end and the reference potential is determined. The MU is switched to apply the first alternating voltage to the second proximal end, apply the second alternating voltage to the third proximal end and determine a second neutral point voltage between the first proximal end and the reference potential. The deterioration state of the suspension member arrangement is determined based on the first and second neutral point voltages.

Method and device for detecting a deterioration state in a suspension member arrangement for an elevator based on AC voltage measurements with suspension members being electrically short-circuited at their distal ends

A connection element for electrically contacting tension members embedded into a matrix material of a load-bearing belt for an elevator system has a frame with an upper part, a lower part and multiple electrically conductive contact elements. The frame is shaped to receive the belt in an interior space delimited at at least two opposite sides. The contact elements are formed as stamped and bent metal parts, and some regions of the contact elements are arranged in the upper part of the frame with other regions protruding from the upper part of the frame into the interior space, for example in the form of piercing tips, in order to contact the tension members embedded in the portion of the belt received in the interior space.

Connection element for electrically contacting tension members in a load-bearing belt for an elevator system, and method for assembling the connection element on the belt

An elevator installation wherein damage to a support for an elevator car and a counterweight, in particular damage to a sheath of the support, advantageously can be detected. At the elevator installation, a housing at least partially extending around the support, for example at a deflecting roller arrangement. A surface of the housing facing the support is electrically conductive and is electrically grounded. If the support or a wire coming out of the damaged support comes in contact with the housing, an electrical ground fault results. The ground fault can be detected by a security monitoring unit by monitoring a current flowing through the wires of the support, and the damage to the support can thus be inferred.

Elevator installation having a supporting means, around which an electrically conductive housing partially extends, in particular at a deflecting roller arrangement

A method monitors at least one suspension apparatus in an elevator system, wherein the suspension apparatus includes at least one electrically conducting tension load carrying member that is surrounded by an electrically insulating jacket. The method includes the steps of: repeated determination of a value of an electrical characteristic of at least one tension load carrying member or of a group of tension load carrying members; establishment of a mean value on the basis of the determined values; and comparison of the mean value established with a reference value.

Method for monitoring elevator system suspension apparatus

An elevator system has a car and a suspension device, wherein the car is least partially carried by the suspension device. The suspension device includes several electrically conductive tension members that are arranged parallel to one another and are essentially enclosed by a jacket. The suspension device is attached to suspension device mounting fixtures, wherein the suspension device mounting fixtures each include a housing and a clamping element. The housing and the clamping element have clamping surfaces between which the suspension device is clamped. The clamping element and/or the housing is made of an electrically insulating material.

Electrically insulating suspension device mounting fixture

A method determines a status of at least one component of an elevator system, wherein the elevator system includes a suspension apparatus having at least one traction member. The at least one traction member is surrounded by a non-metallic cladding, wherein the suspension apparatus is guided via a drive sheave with a metallic traction surface. The method includes the steps of: identifying at least one parameter based on an electrostatic effect which occurs due to friction of the non-metallic cladding on the traction sheave with the metallic traction surface; and determining a status of the at least one component on the basis of the identified parameter.

Method for determining state of elevator system component

A support for an elevator car in an elevator installation includes a plurality of tensile carriers, arranged parallel to one another, and a casing. The tensile carriers are enclosed by the casing, wherein the tensile carriers extend along a longitudinal axis of the support. The tensile carriers are freed at least partly from the casing on a section of the longitudinal axis of the support. Contact elements for electrical contacting of the exposed tensile carriers are fastened to the tensile carriers at this section.

Monitoring of support in elevator installations

A method of providing a support for an elevator car in an elevator installation, wherein the support includes a plurality of tensile carriers arranged parallel to one another and substantially enclosed by a casing, includes pre-preparation of a first support end wherein the tensile carriers are directly electrically contactable at a pre-prepared location by a contacting device, and wherein the pre-preparation is carried out before transport of the support to the elevator installation.

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Root, Switzerland

Florian Dold