EP1357073A1 - Detecteur de l'allongement d'un cable principal d'ascenseur - Google Patents

Detecteur de l'allongement d'un cable principal d'ascenseur Download PDF

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Publication number
EP1357073A1
EP1357073A1 EP00979984A EP00979984A EP1357073A1 EP 1357073 A1 EP1357073 A1 EP 1357073A1 EP 00979984 A EP00979984 A EP 00979984A EP 00979984 A EP00979984 A EP 00979984A EP 1357073 A1 EP1357073 A1 EP 1357073A1
Authority
EP
European Patent Office
Prior art keywords
main rope
detector apparatus
electrical resistance
determining means
electrically
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Withdrawn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
EP00979984A
Other languages
German (de)
English (en)
Other versions
EP1357073A4 (fr
Inventor
Hiroyuki Takagi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1357073A1 publication Critical patent/EP1357073A1/fr
Publication of EP1357073A4 publication Critical patent/EP1357073A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/145—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising elements for indicating or detecting the rope or cable status
    • 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
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0037—Performance analysers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • B66B7/10—Arrangements of ropes or cables for equalising rope or cable tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • B66B7/1207—Checking means
    • B66B7/1215—Checking means specially adapted for ropes or cables
    • B66B7/1223—Checking means specially adapted for ropes or cables by analysing electric variables
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2301/00—Controls
    • D07B2301/25—System input signals, e.g. set points
    • D07B2301/259—Strain or elongation
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2301/00—Controls
    • D07B2301/55—Sensors
    • D07B2301/5531—Sensors using electric means or elements
    • D07B2301/554—Sensors using electric means or elements for measuring variable resistance

Definitions

  • the present invention relates to an elevator main rope elongation detector apparatus disposed in an elevator in which a car is suspended inside a hoistway by a main rope made of a synthetic fiber rope, the elevator main rope elongation detector apparatus detecting elongation of the main rope.
  • a car and a counterweight are suspended inside a hoistway by a main rope.
  • a car buffer and a counterweight buffer are installed on a bottom portion of the hoistway.
  • a clearance dimension between the counterweight and the counterweight buffer when the car is stopped at an uppermost floor is required to be constantly maintained at a specified value.
  • the clearance dimension between the counterweight and the counterweight buffer is reduced by elongation of the main rope with the passage of time.
  • the amount of elongation of the main rope is as much as twice that of a steel rope.
  • the clearance dimension between the counterweight and the counterweight buffer is conventionally measured during routine inspection.
  • one maintenance worker drives the elevator, and another maintenance worker enters a pit in the hoistway and performs the measurement. Consequently, two maintenance workers are required, reducing work efficiency.
  • the present invention aims to solve the above problems and an object of the present invention is to provide an elevator main rope elongation detector apparatus enabling elongation of a main rope made of a synthetic fiber rope to be detected simply and efficiently.
  • an elevator main rope elongation detector apparatus disposed in an elevator in which a car is suspended inside a hoistway by a main rope made of a synthetic fiber rope having a synthetic fiber strand and an electrically-conductive filament, the elevator main rope elongation detector apparatus detecting elongation of the main rope, wherein the elevator main rope elongation detector apparatus includes: an electrical resistance measuring apparatus for measuring electrical resistance in the electrically-conductive filament; a determining means for determining whether a measured value from the electrical resistance measuring apparatus is within a preset normal range; and a warning means for issuing a warning when the measured value is determined by the determining means to be outside the preset normal range.
  • Figure 1 is a structural diagram showing an elevator main rope elongation detector apparatus according to Embodiment 1 of the present invention.
  • a car 1 and a counterweight 2 are suspended inside a hoistway by a main rope 3 made of a synthetic fiber rope.
  • the main rope 3 includes: a plurality of synthetic fiber strands; and a plurality of carbon filaments functioning as electrically-conductive filaments integrated into at least some of these synthetic fiber strands over an entire length of each.
  • An intermediate portion of the main rope 3 is wound around a drive sheave 5 of a driving machine 4 disposed in an upper portion of the hoistway.
  • the car 1 and the counterweight 2 are raised and lowered by means of a driving force from the driving machine 4.
  • a pair of car suspension sheaves 6 around which the main rope 3 is wound are disposed on a lower portion of the car 1.
  • a counterweight suspension sheave 7 around which the main rope 3 is wound is disposed on an upper portion of the counterweight 2.
  • First and second end portions of the main rope 3 are connected to respective rope stops 8 and 9 in the upper portion of the hoistway.
  • An electrical resistance measuring apparatus 11 for measuring electrical resistance in the carbon filaments integrated into the main rope 3 is disposed in a control panel 10 for controlling elevator operation.
  • the electrical resistance measuring apparatus 11 is connected to first and second end portions of the carbon filaments.
  • a main rope elongation detector apparatus includes the electrical resistance measuring apparatus 11, the determining means 12, and the warning means 13.
  • the electrical resistance of the carbon filaments in the main rope 3 is measured by the electrical resistance measuring apparatus 11 when necessary.
  • the carbon filaments are disposed over the entire length of the main rope 3, stretching in a similar manner to the main rope 3 when age-related elongation arises in the main rope 3. In other words, when elongation arises in the main rope 3, the entire length of the carbon filaments elongates, reducing cross-sectional area and increasing electrical resistance.
  • the measured value from the electrical resistance measuring apparatus 11 is monitored by the determining means 12 to determine whether there is any abnormality. If the measured value exceeds the preset normal range, an abnormality detection signal is sent to the warning means 13, whereby a warning is issued by the warning means 13. Then, any required action such as run-by adjustments or replacement of the main rope 3, etc., is undertaken by maintenance workers who receive the warning.
  • a main rope elongation detector apparatus of this kind elongation of the main rope 3 can be detected simply and efficiently when necessary regardless of the position of the car 1. Furthermore, the elongation of the main rope 3 can be checked remotely and automatically, enabling reductions in costs required for maintenance inspections.
  • Figure 2 is a structural diagram showing part of an elevator main rope elongation detector apparatus according to Embodiment 2 of the present invention.
  • the main rope 3 made of a synthetic fiber rope includes: a plurality of synthetic fiber strands 31 composed of an aramid resin or the like; and a plurality of carbon filaments 32 functioning as electrically-conductive filaments integrated into at least some of these synthetic fiber strands 31 over an entire length of each.
  • the electrical resistance measuring apparatus 11 is connected only to the first end portion of the main rope 3.
  • the synthetic fiber strands 31 are bundled in pairs by means of end portion connectors 33.
  • the carbon filaments 32 are also electrically connected in series in pairs by the end portion connectors 33.
  • a plurality of electrical component sets each including an electric power supply 35 for applying a voltage to the carbon filaments 32 through a resistor 34, a low-pass filter 36, and an analog-to-digital (A/D) converter 37 are disposed in the electrical resistance measuring apparatus 11.
  • the rest of the construction is similar to that of Embodiment 1.
  • the electrical resistance measuring apparatus 11 needs to be connected only at a single end portion of the main rope 3, facilitating wiring.
  • the electrical resistance measuring apparatus 11 needs to be connected only to a car end portion or to a counterweight end portion of the main rope 3, enabling the construction of the apparatus to be simplified.
  • Figure 3 is a structural diagram showing part of an elevator main rope elongation detector apparatus according to Embodiment 3 of the present invention.
  • all of the carbon filaments 32 contained in one main rope 3 are electrically connected in series by a plurality of the end portion connectors 33.
  • the total number of carbon filaments 32 is an even number (six in the figure), the electrical resistance measuring apparatus 11 being connected only at the first end portion of the main rope 3.
  • the rest of the construction is similar to that of Embodiment 1.
  • the electrical resistance measuring apparatus 11 needs to be connected only at a single end portion of the main rope 3, facilitating wiring.
  • the electrical resistance measuring apparatus 11 needs to be connected only to a car end portion or to a counterweight end portion of the main rope 3, enabling the construction of the apparatus to be simplified.
  • all of the carbon filaments 32 in one main rope 3 are electrically connected in series, it is not necessary to measure the electrical resistance for each of the carbon filaments 32 individually, enabling the construction of the electrical resistance measuring apparatus 11 to be simplified.
  • the carbon filaments 32 in one main rope 3 were electrically connected in series, but when a plurality of main ropes 3 are used, as shown in Figure 4 for example, the construction of the electrical resistance measuring apparatus 11 can be further simplified by electrically connecting the carbon filaments 32 in series over the plurality of main ropes 3.
  • FIG. 5 is a block diagram showing part of an elevator main rope elongation detector apparatus according to Embodiment 5 of the present invention.
  • signals from the electrical resistance measuring apparatus 11, a temperature detector apparatus 21, and a humidity detector apparatus 22 are input into a central processing unit (CPU) 14 of the determining means 12 through input circuits 15 and 16.
  • the temperature detector apparatus 21 detects temperature inside the hoistway, outputting that information to the determining means 12.
  • the humidity detector apparatus 22 detects humidity inside the hoistway, outputting that information to the determining means 12.
  • an abnormality detection signal is output to the warning means 13 through an output circuit 18.
  • detecting precision for elongation of the main rope 3 can be improved by making a decision based not merely on a comparison between set values and the measured value, but also considering expansion and contraction of the main rope 3 due to temperature and humidity inside the hoistway.
  • abnormality in the amount of elongation may also be determined by storing an initial electrical resistance in the memory 17 and comparing the measured value with this initial electrical resistance, enabling the detecting precision to be improved by eliminating the effects of initial irregularities in the main rope 3 and the carbon filaments 32.
  • abnormality in the amount of elongation may also be determined from a mean value for a plurality of measured values, enabling the detecting precision to be improved by eliminating the effects of measurement errors.
  • the electrical resistance in a plurality of carbon filaments 32 is measured in one main rope 3, but the elongation of the main rope 3 can be detected by measuring the electrical resistance in just one or more of the carbon filaments 32.
  • reliability can be improved by measuring the electrical resistance in a plurality of the carbon filaments 32.
  • carbon filaments 32 are shown as the electrically-conductive filaments, but the filaments may also be composed of any other electrically-conductive material.
  • the main rope elongation detector apparatus is disposed inside the control panel 10, but the main rope elongation detector apparatus may also be disposed on the car 1 or the counterweight 2 with the abnormality detection signal being sent to the control panel 10.
  • the electrical resistance may also be sought as a numerical value and determined directly, or may also be determined indirectly by measuring a voltage when a predetermined electric current is applied and determining whether that voltage is within a normal range.

Landscapes

  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP00979984A 2000-12-07 2000-12-07 Detecteur de l'allongement d'un cable principal d'ascenseur Withdrawn EP1357073A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/008673 WO2002046082A1 (fr) 2000-12-07 2000-12-07 Detecteur de l'allongement d'un cable principal d'ascenseur

Publications (2)

Publication Number Publication Date
EP1357073A1 true EP1357073A1 (fr) 2003-10-29
EP1357073A4 EP1357073A4 (fr) 2006-05-31

Family

ID=11736772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00979984A Withdrawn EP1357073A4 (fr) 2000-12-07 2000-12-07 Detecteur de l'allongement d'un cable principal d'ascenseur

Country Status (4)

Country Link
EP (1) EP1357073A4 (fr)
JP (1) JPWO2002046082A1 (fr)
CN (1) CN1243658C (fr)
WO (1) WO2002046082A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7123030B2 (en) * 1999-03-29 2006-10-17 Otis Elevator Company Method and apparatus for detecting elevator rope degradation using electrical resistance
EP1846741A2 (fr) * 2004-03-16 2007-10-24 Otis Elevator Company Systeme et procede de surveillance de la resistance a la traction d'un support
US20080149430A1 (en) * 2006-12-04 2008-06-26 Claudio De Angelis Synthetic fiber rope
US20110000746A1 (en) * 2008-01-18 2011-01-06 Kone Corporation Rope for a hoisting device, elevator and use
CN102933482A (zh) * 2009-12-21 2013-02-13 因温特奥股份公司 监测升降机***的悬吊及牵引装置
US20130270042A1 (en) * 2012-04-12 2013-10-17 Inventio Ag Determining states of elevator components
CN103738873A (zh) * 2013-12-20 2014-04-23 诺威起重设备（苏州）有限公司 洁净室用防尘电动葫芦
US8807286B2 (en) 2012-12-30 2014-08-19 Kone Corporation Method and an arrangement in rope condition monitoring of an elevator
US20140305744A1 (en) * 2012-01-24 2014-10-16 Kone Corporation Rope of a lifting device, a rope arrangement, an elevator and a condition monitoring method for the rope of a lifting device
CN105060057A (zh) * 2015-09-14 2015-11-18 云南名家智能设备股份有限公司 钢带检测装置
US20150375963A1 (en) * 2013-02-21 2015-12-31 Otis Elevator Company Elevator cord health monitoring
WO2016062454A1 (fr) * 2014-10-22 2016-04-28 Inventio Ag Installation d'élévation
US9423369B2 (en) 2010-09-01 2016-08-23 Otis Elevator Company Resistance-based monitoring system and method
WO2017032914A1 (fr) * 2015-08-21 2017-03-02 Kone Corporation Agencement et procédés pour le contrôle de l'état de la courroie de traction et/ou la fin de la courroie de traction
US9599582B2 (en) 2010-09-01 2017-03-21 Otis Elevator Company Simplified resistance based belt inspection
EP3428111A1 (fr) * 2014-03-21 2019-01-16 Liebherr-Components Biberach GmbH Dispositif de détermination du moment de dépose d'un câble lorsqu'il est utilisé dans des engins de levage
EP3527523A1 (fr) * 2018-02-19 2019-08-21 Otis Elevator Company Systèmes et procédés de surveillance de composants de porte d'ascenseur

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Publication number Priority date Publication date Assignee Title
EP1435407A1 (fr) * 2003-01-02 2004-07-07 Teijin Twaron B.V. Fil d'aramide ayant un apprêt conducteur
WO2005094249A2 (fr) * 2004-03-16 2005-10-13 Otis Elevator Company Dispositif de connexion electrique utilise avec des elements de support de charge d'un dispositif de levage
DE502005009483D1 (de) 2005-03-12 2010-06-10 Thyssenkrupp Elevator Ag Aufzuganlage
JP5436776B2 (ja) * 2006-05-25 2014-03-05 三菱電機株式会社 エレベータ装置
JP2007320730A (ja) * 2006-06-02 2007-12-13 Mitsubishi Electric Corp エレベータのドア制御装置
CN102256888B (zh) * 2008-12-22 2014-02-19 因温特奥股份公司 用于监控电梯承载机构的方法、电梯承载机构监控装置以及具有这种监控装置的电梯设备
JPWO2011158871A1 (ja) * 2010-06-16 2013-08-19 Natac株式会社 エレベータ用ワイヤロープの損傷監視方法及びエレベータ用ワイヤロープの損傷監視装置
CN102115991B (zh) * 2010-12-31 2012-10-03 北京建龙重工集团有限公司 一种钢丝绳及其断裂预警装置和预警方法
DE202011001846U1 (de) * 2011-01-24 2012-04-30 Liebherr-Components Biberach Gmbh Vorrichtung zur Erkennung der Ablegereife eines hochfesten Faserseils beim Einsatz an Hebezeugen
JP2011102195A (ja) * 2011-01-28 2011-05-26 Otis Elevator Co 引張支持強度監視システムおよび方法
JP5865037B2 (ja) * 2011-11-28 2016-02-17 株式会社日立製作所 エレベータの運行管理システム
EP2794448B1 (fr) * 2011-12-20 2018-06-13 Inventio AG Installation d'ascenseur
CN102530692B (zh) * 2012-03-20 2013-12-04 扬州凯思特机械有限公司 一种罐笼承载钢丝绳伸长量的智能补偿方法
CN102602787B (zh) * 2012-03-20 2014-01-08 扬州凯思特机械有限公司 一种罐笼承载钢丝绳伸长量的智能补偿方法及其专用装置
WO2014064021A1 (fr) * 2012-10-22 2014-05-01 Inventio Ag Moyen de suspension pour un système d'ascenseur
WO2014083043A1 (fr) * 2012-11-29 2014-06-05 Inventio Ag Installation d'ascenseur
CN103359567B (zh) * 2013-07-26 2015-10-14 日立电梯（中国）有限公司 电梯称重***
CN114803773A (zh) * 2014-02-18 2022-07-29 奥的斯电梯公司 用于电梯受拉构件的检查***的连接器
CA3000694C (fr) 2015-09-30 2019-02-26 Greg Zoltan Mozsgai Evaluation non destructive de produits de cordage
AU2018202655B2 (en) * 2017-04-20 2023-12-07 Otis Elevator Company Tension member for elevator system belt
CN107352485B (zh) * 2017-07-19 2023-01-06 天奇自动化工程股份有限公司 一种具备皮带断裂预警功能的升降机
US20190100408A1 (en) * 2017-09-29 2019-04-04 Otis Elevator Company Rope deterioration detection
CN108275523A (zh) * 2017-12-12 2018-07-13 无锡创联科技有限公司 一种垂直梯预防及******
WO2019130425A1 (fr) * 2017-12-26 2019-07-04 三菱電機株式会社 Ascenseur
JP2020007078A (ja) * 2018-07-05 2020-01-16 東芝エレベータ株式会社 報知装置及び報知方法

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JPH05338958A (ja) * 1992-06-02 1993-12-21 Mitsubishi Electric Corp エレベーター用補償索張り車装置
CA2169431C (fr) * 1995-03-06 2005-07-12 Claudio De Angelis Materiel servant a indiquer quand des cables a fibres synthetiques doivent etre mis au rebut

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EP1029973A1 (fr) * 1999-01-22 2000-08-23 Inventio Ag Détection de l'endommagement de la gaine d'un câble en fibres synthétiques

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Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7123030B2 (en) * 1999-03-29 2006-10-17 Otis Elevator Company Method and apparatus for detecting elevator rope degradation using electrical resistance
EP1846741A2 (fr) * 2004-03-16 2007-10-24 Otis Elevator Company Systeme et procede de surveillance de la resistance a la traction d'un support
EP1846741A4 (fr) * 2004-03-16 2009-09-16 Otis Elevator Co Systeme et procede de surveillance de la resistance a la traction d'un support
US7653506B2 (en) 2004-03-16 2010-01-26 Otis Elevator Company Tensile support strength monitoring system and method
US20080149430A1 (en) * 2006-12-04 2008-06-26 Claudio De Angelis Synthetic fiber rope
US8360208B2 (en) * 2006-12-04 2013-01-29 Inventio Ag Synthetic fiber rope for supporting an elevator car
US20110000746A1 (en) * 2008-01-18 2011-01-06 Kone Corporation Rope for a hoisting device, elevator and use
US11565912B2 (en) 2008-01-18 2023-01-31 Kone Corporation Rope for a hoisting device, elevator and use
US10843900B2 (en) 2008-01-18 2020-11-24 Kone Corporation Rope for a hoisting device, elevator and use
US9828214B2 (en) * 2008-01-18 2017-11-28 Kone Corporation Synthetic fiber rope for hoisting in an elevator
AU2010342458B2 (en) * 2009-12-21 2015-09-17 Inventio Ag Monitoring a supporting and propulsion means of an elevator system
AU2010342458A8 (en) * 2009-12-21 2015-10-22 Inventio Ag Monitoring a supporting and propulsion means of an elevator system
CN102933482A (zh) * 2009-12-21 2013-02-13 因温特奥股份公司 监测升降机***的悬吊及牵引装置
WO2011085885A3 (fr) * 2009-12-21 2013-04-25 Inventio Ag Surveillance d'un moyen de support et d'entraînement d'un système d'ascenseur
EP2516313B1 (fr) 2009-12-21 2015-04-08 Inventio AG Surveillance d'un moyen de support et d'entraînement d'un système d'ascenseur
EP2910510A1 (fr) * 2009-12-21 2015-08-26 Inventio AG Surveillance d'un moyen de traction et d'entraînement d'une installation d'ascenseur
US8686747B2 (en) 2009-12-21 2014-04-01 Inventio Ag Monitoring a suspension and traction means of an elevator system
US9423369B2 (en) 2010-09-01 2016-08-23 Otis Elevator Company Resistance-based monitoring system and method
US9599582B2 (en) 2010-09-01 2017-03-21 Otis Elevator Company Simplified resistance based belt inspection
US20140305744A1 (en) * 2012-01-24 2014-10-16 Kone Corporation Rope of a lifting device, a rope arrangement, an elevator and a condition monitoring method for the rope of a lifting device
US9834409B2 (en) * 2012-01-24 2017-12-05 Kone Corporation Rope of a lifting device for an elevator and a condition monitoring method for the rope
US20130270042A1 (en) * 2012-04-12 2013-10-17 Inventio Ag Determining states of elevator components
US8807286B2 (en) 2012-12-30 2014-08-19 Kone Corporation Method and an arrangement in rope condition monitoring of an elevator
US20150375963A1 (en) * 2013-02-21 2015-12-31 Otis Elevator Company Elevator cord health monitoring
US9731939B2 (en) * 2013-02-21 2017-08-15 Otis Elevator Company Elevator cord health monitoring
CN103738873A (zh) * 2013-12-20 2014-04-23 诺威起重设备（苏州）有限公司 洁净室用防尘电动葫芦
EP3428111A1 (fr) * 2014-03-21 2019-01-16 Liebherr-Components Biberach GmbH Dispositif de détermination du moment de dépose d'un câble lorsqu'il est utilisé dans des engins de levage
US10214396B2 (en) 2014-03-21 2019-02-26 Liebherr-Components Biberach Gmbh Device for determining the replacement state or wear of a rope during use in lifting gear
US10730720B2 (en) 2014-10-22 2020-08-04 Inventio Ag Method for monitoring elevator system suspension apparatus
WO2016062454A1 (fr) * 2014-10-22 2016-04-28 Inventio Ag Installation d'élévation
WO2017032914A1 (fr) * 2015-08-21 2017-03-02 Kone Corporation Agencement et procédés pour le contrôle de l'état de la courroie de traction et/ou la fin de la courroie de traction
CN105060057A (zh) * 2015-09-14 2015-11-18 云南名家智能设备股份有限公司 钢带检测装置
EP3527523A1 (fr) * 2018-02-19 2019-08-21 Otis Elevator Company Systèmes et procédés de surveillance de composants de porte d'ascenseur

Also Published As

Publication number Publication date
CN1243658C (zh) 2006-03-01
CN1433372A (zh) 2003-07-30
WO2002046082A1 (fr) 2002-06-13
JPWO2002046082A1 (ja) 2004-04-08
EP1357073A4 (fr) 2006-05-31

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