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EP2213606B1 - Dispositif d'ascenseur - Google Patents

Dispositif d'ascenseur Download PDF

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Publication number
EP2213606B1
EP2213606B1 EP08710980.7A EP08710980A EP2213606B1 EP 2213606 B1 EP2213606 B1 EP 2213606B1 EP 08710980 A EP08710980 A EP 08710980A EP 2213606 B1 EP2213606 B1 EP 2213606B1
Authority
EP
European Patent Office
Prior art keywords
sheave
car
slippage
main ropes
main rope
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.)
Not-in-force
Application number
EP08710980.7A
Other languages
German (de)
English (en)
Other versions
EP2213606A4 (fr
EP2213606A1 (fr
Inventor
Atsushi Mitsui
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 EP2213606A1 publication Critical patent/EP2213606A1/fr
Publication of EP2213606A4 publication Critical patent/EP2213606A4/fr
Application granted granted Critical
Publication of EP2213606B1 publication Critical patent/EP2213606B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3492—Position or motion detectors or driving means for the detector

Definitions

  • the present invention relates to a traction elevator apparatus in which a car and a counterweight are suspended by a main rope.
  • an undercut groove that has a width that is less than that of a sheave groove that is disposed on an outer circumferential surface of a sheave is disposed on a bottom portion of the sheave groove, thereby ensuring required frictional force against a main rope.
  • a rotation detector that generates a signal that corresponds to movement of the main rope is disposed in addition to a rotation detector that generates a signal that corresponds to rotation of the sheave, and slippage of the main rope relative to the sheave is determined by comparing the signals from the two rotation detectors (see Patent Literature 1, for example).
  • Patent Literature 1 Japanese Patent Laid-Open No. SHO 62-205973 (Gazette )
  • the present invention aims to solve the above problems and an object of the present invention is to provide an elevator apparatus that can test for slippage of a main rope relative to a sheave using a simple configuration.
  • JP 2007/153547 discloses features falling under the preamble of claim 1.
  • an elevator apparatus having the features of claim 1.
  • Figure 1 is a structural diagram that shows an elevator apparatus according to Embodiment 1 of the present invention.
  • a pair of car guide rails 2 and a pair of counterweight guide rails 3 are installed inside a hoistway 1.
  • a car 4 is raised and lowered inside the hoistway 1 along the car guide rails 2.
  • a counterweight 5 is raised and lowered inside the hoistway 1 along the counterweight guide rails 3.
  • a machine room 6 is disposed in an upper portion of the hoistway 1.
  • a machine base 7 is installed inside the machine room 6.
  • a hoisting machine 8 and a deflecting sheave 9 are supported by the machine base 7.
  • the hoisting machine 8 has a hoisting machine main body 10 and a sheave 11. Included in the hoisting machine main body 10 are: a motor that rotates the sheave 11; and a brake that brakes rotation of the sheave 11.
  • a plurality of main ropes 12 (only one is shown in the figures) are wound around the sheave 11 and the deflecting sheave 9. First end portions of the main ropes 12 are connected to an upper portion of the car 4. Second end portions of the main ropes 12 are connected to an upper portion of the counterweight 5. The car 4 and the counterweight 5 are suspended inside the hoistway 1 by the main ropes 12, and are raised and lowered by the hoisting machine 8.
  • a rotation detector that generates a signal that corresponds to the rotation of the sheave 11 (a speed detector) 13 is disposed on the hoisting machine 8.
  • An encoder that generates pulse signals that corresponds to the rotation of the sheave 11, for example, can be used as the rotation detector 13.
  • the signal from the rotation detector 13 is input into an elevator control apparatus 14 that controls running of the car 4, i.e., driving of the hoisting machine 8.
  • the elevator control apparatus 14 computes the speed and distance traveled by the car 4 based on the signal from the rotation detector 13.
  • a slippage testing portion 15 that tests for the presence or absence of slippage of the main ropes 12 relative to the sheave 11 is disposed on the elevator control apparatus 14.
  • the elevator control apparatus 14 has a computer that has a storage portion, an arithmetic processing portion, and a signal input/output portion. Functions of the slippage testing portion 15 can be implemented by the computer, for example.
  • Figure 2 is a partial cross section of the sheave 11 from Figure 1 .
  • a plurality of sheave grooves 11a into which the main ropes 12 are inserted are disposed on an outer circumferential surface of the sheave 11.
  • Undercut grooves 11b that have smaller widths than the sheave grooves 11a are disposed on bottom portions of the sheave grooves 11a.
  • the sheave grooves 11a are abraded over time by contact with the main ropes 12.
  • Figure 3 is a cross section that shows a state in which abrasion of the sheave groove 11a from Figure 2 has progressed.
  • Figures 4 and 5 are explanatory diagrams that schematically show changes in tension of the main ropes 12 that pass through the sheave 11, Figure 4 representing when the car 4 from Figure 1 is ascending, and Figure 5 representing when the car 4 from Figure 1 is descending.
  • Traction elevator apparatuses are designed so as to satisfy: T 1 / T 2 > e ⁇ k ⁇ , when T 1 > T 2, and T 2 / T 1 > e ⁇ k ⁇ , when T 1 ⁇ T 2, where T1 is tension on a side near the car 4, T2 is tension on a side near the counterweight 5, ⁇ is a contact angle of the main ropes 12 on the sheave 11, ⁇ is a coefficient of friction between the main ropes 12 and the sheave 11, and k is a shape coefficient of the sheave grooves 11a.
  • tension changes exponentially from T2 to T1, or from T1 to T2, within the limit angle ⁇ 1 required to operate without generating slippage between the main ropes 12 and the sheave 11.
  • Tension does not change in a zone of difference between the actual contact angle ⁇ and ⁇ 1, in which traction acts to change tension, i.e., ⁇ - ⁇ 1.
  • this region where tension does not change is known to be always present on the side that is being raised irrespective of the magnitude of the tension.
  • the main ropes 12 and the sheave 11 drift by an identical amount in each direction whichever side is considered, and the amount of drift between the sheave 11 and the main ropes 12 when one round trip is made is the tension differential extension 5 of the main ropes 12.
  • drift between the sheave 11 and the main ropes 12, i.e., creep can be calculated by measuring cumulative rotational speed of the sheave 11 when the car 4 is driven up and down by a given distance and calculating differences in the measured values.
  • Traction capacity rarely suddenly decreases significantly, usually decreasing gradually over a long period of use due to the sheave grooves 11a being abraded, or the main ropes 12 being abraded and deteriorating, etc. For this reason, it is not necessary for verification of traction capacity, i.e., verification of the presence or absence of slippage, to be performed constantly, and it need only be performed regularly, for example, making use of a time period during which the elevator apparatus is not used (at night, for example).
  • a slippage detection signal is transmitted to a remote elevator monitoring switchboard to let it be known that inspection of the sheave 11 and the main ropes 12 is required. If slippage is even greater, and is determined to be at a level at which normal operation is impossible, operation of the elevator apparatus is stopped.
  • the slippage testing portion 15 when performing a slippage test, it is preferable for the slippage testing portion 15 to run the car 4 through a speed pattern in which constant speed traveling time is significantly shorter than accelerating and decelerating time. It is even more preferable to minimize, i.e., completely eliminate, the constant speed traveling time, enabling slippage detecting precision to be improved even further.
  • an elevator apparatus of this kind because a car 4 is operated through a round trip for a predetermined distance, and slippage between a sheave 11 and main ropes 12 is tested by a slippage testing portion 15 based on a difference in a signal from a rotation detector 13 during ascent and a signal from the rotation detector 13 during descent, apparatus or software is required for pulse integration, but slippage can be tested using a simple configuration without having to dispose another rotation detector that would require separate space.
  • slippage testing portion 15 performs the slippage test after the car 4 is confirmed to be in an unloaded state, slippage can be detected precisely under stable conditions.
  • slippage testing portion 15 runs the car 4 through a speed pattern in which constant speed traveling time is shorter than accelerating and decelerating time when performing the slippage test, slippage detecting precision can be improved.
  • the slippage testing portion 15 is disposed on the elevator control apparatus 14, but the slippage testing portion 15 may also be disposed on another apparatus such as safety monitoring apparatus, etc., or may also be an independent apparatus, for example.
  • the main ropes 12 may be ropes that have circular cross sections, or may also be belts.
  • an elevator apparatus using a one-to-one (1:1) roping method is shown, but is not limited thereto, and for example, the present invention can also be applied to an elevator apparatus using a two-to-one (2:1) roping method.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Claims (2)

  1. Dispositif ascenseur comprenant :
    une machine de levage (8) qui a une poulie (11) ;
    une corde principale (12) enroulée autour de la poulie (11) ;
    une cabine (4) qui est suspendue par la corde principale (12) sur un premier côté de la poulie (11) ;
    un contrepoids (5) qui est suspendu par la corde principale (12) sur un second côté de la poulie (11) ;
    un détecteur de rotation (13) qui génère un signal qui correspond à la rotation de la poulie (11) ; et
    une portion de test de glissement (15) qui actionne la cabine (4) en aller-retour sur une distance prédéterminée, et qui teste le glissement entre la poulie (11) et la corde principale (12) sur la base d'une différence entre un signal venant du détecteur de rotation (13) pendant la remontée et un signal venant du détecteur de rotation (13) pendant la descente,
    caractérisé en ce que
    la portion de test de glissement (15) fait rouler la cabine (4) selon un schéma de vitesse dans lequel la cabine (4) est accélérée à une vitesse prédéterminée, puis décélérée et arrêtée de manière à éliminer complètement un temps de déplacement à vitesse constante.
  2. Dispositif ascenseur selon la revendication 1, dans lequel la portion de test de glissement (15) effectue un test de glissement après avoir confirmé que la cabine (4) est dans un état non chargé.
EP08710980.7A 2008-02-08 2008-02-08 Dispositif d'ascenseur Not-in-force EP2213606B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/052101 WO2009098772A1 (fr) 2008-02-08 2008-02-08 Dispositif d'ascenseur

Publications (3)

Publication Number Publication Date
EP2213606A1 EP2213606A1 (fr) 2010-08-04
EP2213606A4 EP2213606A4 (fr) 2014-05-14
EP2213606B1 true EP2213606B1 (fr) 2018-04-25

Family

ID=40951860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08710980.7A Not-in-force EP2213606B1 (fr) 2008-02-08 2008-02-08 Dispositif d'ascenseur

Country Status (5)

Country Link
EP (1) EP2213606B1 (fr)
JP (1) JP5334868B2 (fr)
KR (1) KR101345885B1 (fr)
CN (1) CN101896415A (fr)
WO (1) WO2009098772A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112016006890B4 (de) 2016-05-23 2022-01-13 Mitsubishi Electric Corporation Aufzugseinrichtung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011042480A (ja) * 2009-08-24 2011-03-03 Mitsubishi Electric Corp エレベータ装置
JP5947094B2 (ja) * 2012-04-25 2016-07-06 株式会社日立製作所 エレベータ
KR101935189B1 (ko) * 2015-02-18 2019-01-03 미쓰비시덴키 가부시키가이샤 엘리베이터의 진단 장치
CN107522056B (zh) * 2017-09-27 2020-05-05 杭州西奥电梯有限公司 一种监测电梯系统曳引能力的方法和系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0684233B2 (ja) 1986-03-05 1994-10-26 株式会社日立製作所 エレベーター装置及びその運転制御方法
DE8904375U1 (de) * 1989-04-07 1989-07-27 TÜV Bayern e.V., 8000 München Vorrichtung zum Erfassen von physikalischen Kenngrößen eines Aufzugs
JPH038681A (ja) * 1989-06-02 1991-01-16 Mitsubishi Electric Corp エレベーターの主索滑り検出装置
JP4836564B2 (ja) * 2005-12-06 2011-12-14 株式会社日立ビルシステム エレベーター用主ロープの滑り量検出方法及び滑り量検出装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112016006890B4 (de) 2016-05-23 2022-01-13 Mitsubishi Electric Corporation Aufzugseinrichtung

Also Published As

Publication number Publication date
EP2213606A4 (fr) 2014-05-14
KR101345885B1 (ko) 2013-12-30
KR20100051109A (ko) 2010-05-14
CN101896415A (zh) 2010-11-24
WO2009098772A1 (fr) 2009-08-13
JP5334868B2 (ja) 2013-11-06
EP2213606A1 (fr) 2010-08-04
JPWO2009098772A1 (ja) 2011-05-26

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