EP3121140A1 - Überwachungsvorrichtung zur erkennung von lockerung in einer anordnung mit einer multiplizität eines aufhängungs- und traktionsmediums eines aufzugs - Google Patents

Überwachungsvorrichtung zur erkennung von lockerung in einer anordnung mit einer multiplizität eines aufhängungs- und traktionsmediums eines aufzugs Download PDF

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Publication number
EP3121140A1
EP3121140A1 EP15178151.5A EP15178151A EP3121140A1 EP 3121140 A1 EP3121140 A1 EP 3121140A1 EP 15178151 A EP15178151 A EP 15178151A EP 3121140 A1 EP3121140 A1 EP 3121140A1
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EP
European Patent Office
Prior art keywords
monitoring device
engagement
actuation part
elongate
screws
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15178151.5A
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English (en)
French (fr)
Inventor
Lin Han
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inventio AG
Original Assignee
Inventio AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inventio AG filed Critical Inventio AG
Priority to EP15178151.5A priority Critical patent/EP3121140A1/de
Publication of EP3121140A1 publication Critical patent/EP3121140A1/de
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/12—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack

Definitions

  • the present invention relates to a monitoring device for detecting slack in an arrangement comprising a multiplicity of flexible suspension and traction media of an elevator, particularly of a traction sheave elevator. Furthermore, the invention relates to an elevator arrangement comprising such monitoring device and to a method for installing such monitoring device.
  • an elevator cabin and/or a counterweight are typically supported by at least one flexible suspension and traction medium, hereinafter referred to as "STM".
  • STM may be for example a cable, rope or belt.
  • STM may carry heavy loads of e.g. several hundreds of kilograms when loaded in a longitudinal tensioning direction.
  • the STM is typically flexible, i.e. may be deflected, bent or curved in a direction transverse to its longitudinal direction. Accordingly, lacking any load in tensioning direction, the STM may slack.
  • the STM is generally driven by a traction sheave which itself is driven for example by a motor.
  • a friction between the traction sheave and the STM may be very high. Due to such high friction, situations may occur in which for example the cabin or the counterweight may not be displaced due to being for example stuck in a fixed position within an elevator shaft and then, as a result of a lacking motion of this elevator component, portions of the STM may become loose, i.e. may slack. Such slacking of the STM may result in undesirable or even dangerous situations. Accordingly, any slack of an STM should be detected in a reliable manner.
  • WO 2007/144456 describes an arrangement for detecting a slack rope in a traction sheave elevator.
  • EP 1 953 108 B1 describes an elevator in which load variations on an STM may be detected with a sensor.
  • WO 2011/131574 A1 describes monitoring the operation state of suspensions in an elevator system wherein a slack support member switch is comprised in an elevator arrangement.
  • monitoring device for detecting slack in an arrangement comprising a multiplicity of flexible STMs of an elevator arrangement which monitoring device, inter alia, may be easily installed and operate in a reliable manner. Furthermore, there may be a need for an elevator arrangement comprising such monitoring device and for a method of installing such monitoring device in an easy and reliable manner.
  • a monitoring device for detecting slack in an arrangement comprising a multiplicity of flexible suspension and traction media of an elevator arrangement
  • the monitoring device comprising an elongate engagement and actuation part and further comprising a sensor.
  • the elongate engagement and actuation part comprises at least two engagement protrusions extending in a protrusion direction.
  • the elongate engagement and actuation part is arranged and adapted such that, when the elongate engagement and actuation part is arranged adjacent to each of the multiplicity of flexible STMs, the at least two engagement protrusions each mechanically interact with one of the flexible STMs such that, when a slack occurs in one of the flexible STMs, a resulting motion of the respective STM is transferred mechanically to the elongate engagement and actuation part.
  • Such mechanical interaction between the engagement protrusions and the STMs might be established via a mechanical engagement of the protrusions into for example recesses comprised in the STM or in a fixation arrangement for fixing the STM at a fixed support structure of the elevator arrangement.
  • the sensor of the monitoring device is arranged and adapted such as to detect the motion of the elongate engagement and actuation part.
  • the monitoring device proposed herein is characterized by the fact that the elongate engagement and actuation part comprises a plurality of screws forming its engagement protrusions.
  • slack detecting monitoring devices have been proposed in which an elongate engagement and actuation part may at the same time be in contact with several STMs and may be used for detecting any motion of the STMs which is a result of slack in one or more of the STMs.
  • Such conventional monitoring devices generally use an elongate engagement and actuation part which is made by punching and bending a metal sheet into a desired configuration.
  • the engagement protrusion is typically realized as a single bended portion or two bended portions of the metal sheet which extend in a longitudinal direction of the elongate engagement and actuation part. When installing such monitoring device, this bended portion has to be precisely adjusted such as to come into close contact with the STMs to be monitored.
  • the elongate engagement and actuation part comprises an elongate body in which each of the screws is fixed such that it protrudes in a protrusion direction being transverse to a longitudinal direction of the elongate body.
  • the screws may for example be screwed into the elongate body such that upon further screwing a screw its extension into the protrusion direction may be modified.
  • the elongate engagement and actuation part may be established with an elongate body into which several screws are screwed and may therefore form the engagement protrusions.
  • the extension dimensions of these engagement protrusions may be modified by more or less screwing, i.e. tightening or loosening, each of the screws.
  • each of the screws forming the engagement protrusions may be precisely adapted such as to come into close contact or into direct mechanical contact with one of the STMs and/or a fixation arrangement of such STMs.
  • each screw may be precisely position independently of other screws.
  • the elongate body comprises a metal sheet which may have an advantageous thickness of for example at least 3mm.
  • the metal sheet may be a steel sheet.
  • such metal sheet may easily be manufactured and brought into a required shape for example by punching and bending the metal sheet. Thereby, the elongate body may be produced in a simple and cost-effective manner.
  • the elongate body may be provided with a sufficient mechanical strength.
  • the elongate body comprises an angled metal sheet comprising a first bracket at which the screws are fixed and a second bracket a motion of which is determined by the sensor of the monitoring device.
  • Such angled configuration of the elongate body may be beneficial in that, on the one hand, the elongate engagement and actuation part may be easily arranged with the first bracket of the elongate body being close to a side surface for example of the STMs and the second bracket of the elongate body being suitably arranged relative to the sensor such that the sensor may easily detect its motion.
  • the senor is a switch which is adapted for being mechanically actuated upon the motion of the elongate engagement and actuation member.
  • the sensor may be a mechanical switch which, for example, may be brought or held by the elongate engagement and actuation part into a first switching state when there is no slack in the monitored STMs and which comes into a second switching state when slack occurs in at least one of the STMs.
  • Such mechanically actuated sensor may be relatively cheap, robust and/or easily installed.
  • the senor may be any other type of sensor as long as being capable of detecting a specific motion of the elongate engagement and actuation part.
  • the sensor may be an optical sensor, an electrical sensor, a magnetic sensor, an inductive sensor, a capacitive sensor, etc.
  • the screws forming the engagement protrusions are thread forming screws.
  • Such thread forming screws may be easily screwed into corresponding openings within for example a metal sheet forming the elongate body of the elongate engagement and actuation part.
  • a typical diameter of the screws can be e.g. between 3mm and 30mm, preferably between 5mm and 15mm.
  • a typical length can be between 10mm and 200mm, preferably between 20mm and 100mm.
  • each of the screws forming the engagement protrusions may comprise a lock nut for fixing its extension position in the protrusion direction.
  • the screws may be easily fixed in a reliable manner and a risk of undesired releasing of any screw or undesired displacing of any screw may be minimized.
  • an elevator arrangement comprising a cabin, multiple suspension and traction media supporting the cabin and a fixation arrangement for fixing the multiple suspension and traction media to a fixed support of the elevator arrangement.
  • the elevator arrangement comprises a monitoring device according to embodiments of the above first aspect of the invention. Due to the provision of such monitoring device, any slack in one or more of the multiple STMs supporting the cabin may be detected in a reliable manner.
  • the monitoring device is adapted and arranged such that its screws forming the engagement protrusions engage with end portions of the multiple STMs and/or with the fixation arrangement.
  • the monitoring device may be fixed with respect to the STMs in such a manner that any slack of at least one of the STMs results in a motion of at least one of the STMs and/or a motion of the fixation arrangement fixing the STMs and the screws forming the engagement protrusions interact or engage with the STMs and/or the fixation arrangement in such a manner that this resulting motion may be detected by the sensor of the monitoring device.
  • a method for installing a monitoring device is proposed.
  • the method is specifically adapted for correctly detecting slack in an arrangement comprising a multiplicity of flexible STMs of an elevator arrangement.
  • the method comprises arranging the elongate engagement and actuation part of the monitoring device at a position adjacent to each of multiple holders, each holder being fixedly attached to one of the multiplicity of flexible STMs and being held at a fixation arrangement for fixing the STMs to a fixed support structure of the elevator arrangement.
  • each of the screws of the elongate engagement and actuation part is screwed into a configuration in which the respective screw comes either into mechanical contact or into close proximity of less than 1mm, preferably less than 0.5mm, to an associated one the holders.
  • the monitoring device may be easily installed in an elevator arrangement and its screws forming the engagement protrusions may be precisely positioned such as to achieve high reliability in detecting any slack of STMs.
  • Fig. 1 shows an elevator arrangement 100 comprising a cabin 102 and a counterweight 104 arranged in an elevator shaft 106.
  • Suspension and traction media 108 comprising for example a plurality of belts or ropes support the cabin 102 and the counterweight 104.
  • First ends of the STMs are fixed to a fixed support structure 112 of the elevator arrangement 100.
  • Second ends of the STMs 108 are fixed to a support structure 114 of the elevator arrangement 100 via a fixation arrangement 116.
  • the support structures 112, 114 may be part of a wall of the elevator shaft 106 or fixed thereto.
  • Fig. 2 shows a perspective view of the fixation arrangement 116 comprising a monitoring device 1 for detecting slack in an arrangement comprising the multiple STMs 108.
  • the fixation arrangement 116 comprises a strong bar 118 to which, in this example, three STMs 108 are connected via holders 120.
  • the holders 120 are cylindrical components having a conical surface 122 at their upper ends.
  • the STMs 108 are fixed to the holders 120 via connection means 126 and long stable fixation screws 128.
  • the monitoring device 1 comprises an elongate engagement and actuation part 3 which is arranged parallel to the bar 118.
  • the elongate engagement and actuation part 3 extends from an outermost first holder 120' to an opposite outermost last holder 120"'.
  • the elongate engagement and actuation part 3 is made from a punched and bent metal sheet and comprises a bent section 5 which engages with the conical surface 122 of each of the holders 120.
  • Fig. 3 shows a side view of the monitoring device 1 of Fig. 2 .
  • the bent portion 5 of the elongate engagement and actuation part 3 comes into close contact and/or engages with the conical surface 122 of the holder 120.
  • a sensor 7 is fixed with respect to the elongate engagement and actuation part 3.
  • the sensor 7 is arranged vertically and may be mechanically actuated by vertically displacing an actuation hub 23.
  • the elongate engagement and actuation part 3 may be displaced due to a motion of one of the STMs 108 as result of an occurring slack in this STM 108.
  • the sensor 7 may then transmit a corresponding signal via e.g. a signal line 109 to a control (not shown) of the elevator arrangement 100.
  • the control may e.g. de-activate the elevator arrangement 100 or initiate an emergency action.
  • the bent portion 5 extends essentially along the entire longitudinal length of the elongate engagement and actuation part 3 and comes into contact with each of the conical surfaces 122 of each of the three holders 120 connected to the three STMs 108.
  • several bent portions 5 may be provided along the longitudinal extension of the elongate engagement and actuation part 3. However, even then, typically one single bent portion 5 contacts two or more of the holders 120", 120'" at their respective conical surfaces 122.
  • a monitoring device 1 is proposed in which multiple screws 11 are provided for forming engagement protrusions which, in the example of Figs. 2 and 3 , was formed by the bent portion 5.
  • the elongate engagement and actuation part 3 carries the multiple screws 11 at positions corresponding to the positions of the holders 120 fixing the STMs 108 at the fixation arrangement 116.
  • the screws 11 are arranged in a line and spaced along the longitudinal direction of the elongate engagement and actuation part 3.
  • An extension direction of the screws 11 is transverse, preferably perpendicular, to a surface of the elongate engagement and actuation part 3.
  • the extension direction of the screws 11 is transverse, preferably perpendicular, to an extension direction of the STMs 108 or to a middle axis of the holders 120.
  • a lock nut 27 is provided which may be tensioned for reliable fixing of the positioning of the screw 11 with respect to the rest of the elongate engagement and actuation part 3.
  • the elongate engagement and actuation part 3 comprises an elongate body 13 formed by an angled metal sheet comprising a first bracket 15 at which the screws 11 are fixed and a second bracket 17 extending transverse to the first bracket 15.
  • the elongate body 13 may be made from a single metal sheet by punching and/or bending.
  • the elongate body 13 may comprise several through holes into which the screws 11 are inserted.
  • hinge extensions 19 are provided which may be accommodated within a hinge support 21 such that the elongate body 13 may pivot around the hinge extensions 19. Accordingly, when e.g. one of the holders 120 moves due to an STM 108 attached thereto becoming slack, its motion is transferred to the elongate body 13 via the screw 11 engaging the holder's conical surface 122, which, in the embodiment of Fig. 4 , is part of a recess 124 in the holder 120. In such motion, the elongate body 13 will pivot around an axis defined through the hinge extensions 19. Accordingly, the first and second brackets 15, 17 will be displaced.
  • An extension portion 21 of the second bracket 17 extending further to right in Fig. 4 is configured to actuate an actuation hub 23 of the sensor 7.
  • actuation hub 23 of the sensor 7 In case the second bracket 17 is displaced in a pivoting motion, such displacement may be detected for example by the sensor 7 due to its actuation hub 23 being mechanically actuated by the extension portion 21.
  • each of the screws 11 may be screwed, i.e. tightened or loosened, into a position such that its end surface comes into mechanical contact or at least into very closed proximity of e.g. less than 0.5mm to an associated holder 120, particularly to the conical surface 122 of the holder 120.
  • each of the STMs 108 comprised in the arrangement to be monitored by the monitoring device 1 screws 11 are provided at the elongate engagement and actuation part 3 for forming its engagement protrusions, each of these engagement protrusions may be accurately positioned by adjusting a screwing position of each screw 11.
  • Figs. 7 to 10 show further embodiments of the monitoring device 1 and its components wherein specific adaptions and modifications of the components and their functions as described with respect to the embodiment shown in Figs. 4 to 6 are substantially self-explaining to one skilled in the art from the figures.
  • the senor 7 is mounted horizontally.
  • An actuation hub 23 of the sensor 7 may be actuated by a slanted appendix 25 of the actuation extension 21 of the second bracket 17 of the elongate body 13.
  • the senor 7 is mounted horizontally at a different position at an upper portion of the first bracket 15. In the embodiment of Fig. 10 , the sensor 7 is mounted vertically at a further different position underneath the elongate body 13.

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  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP15178151.5A 2015-07-23 2015-07-23 Überwachungsvorrichtung zur erkennung von lockerung in einer anordnung mit einer multiplizität eines aufhängungs- und traktionsmediums eines aufzugs Withdrawn EP3121140A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15178151.5A EP3121140A1 (de) 2015-07-23 2015-07-23 Überwachungsvorrichtung zur erkennung von lockerung in einer anordnung mit einer multiplizität eines aufhängungs- und traktionsmediums eines aufzugs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15178151.5A EP3121140A1 (de) 2015-07-23 2015-07-23 Überwachungsvorrichtung zur erkennung von lockerung in einer anordnung mit einer multiplizität eines aufhängungs- und traktionsmediums eines aufzugs

Publications (1)

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EP3121140A1 true EP3121140A1 (de) 2017-01-25

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EP15178151.5A Withdrawn EP3121140A1 (de) 2015-07-23 2015-07-23 Überwachungsvorrichtung zur erkennung von lockerung in einer anordnung mit einer multiplizität eines aufhängungs- und traktionsmediums eines aufzugs

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD154288A1 (de) * 1980-11-12 1982-03-10 Juergen Pietzsch Einrichtung zur ueberwachung der seilspannung an tragseilen
WO2007144456A1 (en) 2006-06-16 2007-12-21 Kone Corporation Arrangement for detecting slack rope of an elevator
WO2011131574A1 (de) 2010-04-19 2011-10-27 Inventio Ag Betriebszustandsüberwachung von tragmitteln in einer aufzugsanlage
CN202063618U (zh) * 2011-05-24 2011-12-07 南通十建集团有限公司 建筑施工电梯牵引绳断绳保护安全机构
EP1953108B1 (de) 2007-02-02 2013-04-03 Inventio AG Aufzug und Verfahren zur Überwachung dieses Aufzuges
CN203237876U (zh) * 2013-04-22 2013-10-16 宁波宏大电梯有限公司 电梯钢丝绳松断绳保护装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD154288A1 (de) * 1980-11-12 1982-03-10 Juergen Pietzsch Einrichtung zur ueberwachung der seilspannung an tragseilen
WO2007144456A1 (en) 2006-06-16 2007-12-21 Kone Corporation Arrangement for detecting slack rope of an elevator
EP1953108B1 (de) 2007-02-02 2013-04-03 Inventio AG Aufzug und Verfahren zur Überwachung dieses Aufzuges
WO2011131574A1 (de) 2010-04-19 2011-10-27 Inventio Ag Betriebszustandsüberwachung von tragmitteln in einer aufzugsanlage
CN202063618U (zh) * 2011-05-24 2011-12-07 南通十建集团有限公司 建筑施工电梯牵引绳断绳保护安全机构
CN203237876U (zh) * 2013-04-22 2013-10-16 宁波宏大电梯有限公司 电梯钢丝绳松断绳保护装置

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