EP2741990A1 - Détection et surveillance d'accès à la cuvette inférieure - Google Patents

Détection et surveillance d'accès à la cuvette inférieure

Info

Publication number
EP2741990A1
EP2741990A1 EP11871060.7A EP11871060A EP2741990A1 EP 2741990 A1 EP2741990 A1 EP 2741990A1 EP 11871060 A EP11871060 A EP 11871060A EP 2741990 A1 EP2741990 A1 EP 2741990A1
Authority
EP
European Patent Office
Prior art keywords
elevator
hoistway
elevator car
lower landing
control system
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.)
Pending
Application number
EP11871060.7A
Other languages
German (de)
English (en)
Other versions
EP2741990A4 (fr
Inventor
Gregor STRICKER
Gerard Sirigu
Ricardo CANO-TORRES
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.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
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 Otis Elevator Co filed Critical Otis Elevator Co
Publication of EP2741990A1 publication Critical patent/EP2741990A1/fr
Publication of EP2741990A4 publication Critical patent/EP2741990A4/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/22—Operation of door or gate contacts
    • 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
    • B66B5/0043—Devices enhancing safety during maintenance
    • B66B5/005—Safety of maintenance personnel
    • B66B5/0056—Safety of maintenance personnel by preventing crushing

Definitions

  • the subject matter disclosed herein relates to elevator systems. More specifically, the subject disclosure relates to elevator systems having a shallow pit and/or a low overhead.
  • Elevator systems having a shallow pit and/or a low overhead being part of so- called “machine room-less” elevator systems, have at least a portion of their drive systems such, as the motor and the brake, located inside of the hoistway of the elevator, where an elevator car travels.
  • Such a construction typically provides construction cost savings and can be more compatible with severe architectural constraints than a traditional elevator system with a machine room and/or regular pits or overheads.
  • Access to the systems located in the hoistway is required periodically for system maintenance and/or repair. As such, safety requires that the elevator car motion is stopped during this time, and that an amount of clearance is provided so that the maintenance and/or repairs can be accomplished.
  • the motor and brake are deactivated to stop motion of the elevator car in the hoistway.
  • An embodiment of an elevator system includes a hoistway and an elevator car moveable along the hoistway.
  • a drive system is located in the hoistway and is operably connected to the elevator car to urge movement of the elevator car along the hoistway.
  • a safety system to establish a protected volume in the hoistway includes a prop installable in the hoistway to prevent downward movement of the elevator car and a plurality of relays configured to detect faults in the elevator control system to prevent movement of the elevator car prior to installation of the prop.
  • the elevator system additionally or alternatively includes each relay of the plurality of relays being in electrical communication with one of a lower landing key switch or a lower landing door contact.
  • the elevator system additionally or alternatively includes an incorrect position of one of the lower landing key switch or the lower landing door contact being indicative a fault in the elevator control system.
  • the elevator system additionally or alternatively includes the fault in the elevator control system tripping one or more of the plurality of relays, thereby deenergizing the drive system.
  • the elevator system additionally or alternatively includes a remote station operably connected to the safety system and configured to detect additional elevator control system faults.
  • a method of preventing movement of an elevator car includes moving the elevator car to a selected position in an elevator system hoistway and opening a lower landing door to provide access to the hoistway beneath the elevator car.
  • One or more faults in an elevator control system are detected via a plurality of relays.
  • Unintended movement of the elevator car is prevented via detection of the one or more faults.
  • a prop is erected in the hoistway to prevent movement of the elevator car.
  • the method additionally or alternatively includes deenergizing a drive system of the elevator car upon detection of the one or more faults, thereby preventing the unintended movement of the elevator car.
  • the method additionally or alternatively includes each relay of the plurality of relays being in electrical communication with one of a lower landing key switch or a lower landing door contact.
  • the method additionally or alternatively includes an incorrect state of one of the lower landing key switch contacts or the lower landing door contacts being indicative of a fault in the elevator control system.
  • the elevator system additionally or alternatively includes the fault in the elevator control system tripping one or more of the plurality of relays, thereby deenergizing the drive system of the elevator car.
  • the elevator system additionally or alternatively includes detecting additional elevator control system faults via a remote station operably connected to the elevator control system.
  • FIG. 1 is a schematic view of an embodiment of an elevator system
  • FIG. 2 is a schematic view of an embodiment of an electrical circuit for an elevator system.
  • FIG. 1 Shown in FIG. 1 is an embodiment of an elevator system 10.
  • the elevator system 10 includes an elevator car 12 moveably vertically in a hoistway 14 along, for example, one or more hoistway rails 16.
  • the elevator car 12 is driven through the hoistway 14 by a machine 18.
  • the machine 18 is connected to the elevator car 12 via one or more drive elements 20, which are cable, belts or the like.
  • the elevator system 10 of FIG. 1 is a machine room-less elevator system 10. In such systems, the elevator car 12 moves essentially along an entire length of the hoistway 14, from a pit 22 located at a bottom of the hoistway 14 to an upper end 24 of the hoistway.
  • the system 10 is configured with a plurality of landings 26 along the hoistway 14.
  • the machine 18 and other drive components are located at the pit 22 or in the overhead 24. They or other elevator components are accessible for maintenance and or repair via a lower landing 28, the lowest such landing 26 in the hoistway 14.
  • the elevator car 12 is moved to a maintenance limit 30 in the hoistway 14 or higher. Moving the elevator car 12 to the maintenance limit 30 or to a higher maintenance position is accomplished by entering an upwards call and then activating a lower key switch 32 located at the lower landing 28. Opening of the lower key switch 32 stops the elevator car 12 immediately and prevents further car 12 movement.
  • the mechanic then opens a set of landing doors 34 at the lower landing 28 which opens landing door contacts 36.
  • the mechanic erects a prop 38 or similar mechanical stop in the pit 22 to establish a protection volume 40 to protect the mechanic while in the pit 22.
  • the prop 38 is inserted into a receptacle in a floor 42 of the pit 22, and physically prevents further downward movement of the elevator car 12.
  • a secondary safety measure is needed to prevent unwanted movement of the elevator car 12 before the prop 38 is erected. Such a safety measure is provided in the circuit of FIG. 2.
  • the circuit of FIG. 2 The circuit of FIG.
  • the safety chain 44 can include bi- stable landing door key switches 32 for each landing 26, and it includes landing door contacts 36 for each set of landing doors 34.
  • the key switches 32 and landing door contacts 36 are connected in such a way that an elevator operation control 46 cannot determine at which landing 26 the landing door contacts 36 are opened.
  • a sub-safety chain 46 is connected to the safety chain 44.
  • the sub-safety chain 46 includes two pairs of relays 48 with positively driven contacts, the relay pairs 48 monitoring the key switch 32 contacts and landing door contacts 36 at the lower landing 28.
  • a fault in one or more of the key switch contacts 32 and/or landing door contacts 36 such as a "stuck closed" fault, is indicated in a first relay 48
  • a second relay 48 is deenergized thereby deenergizing the machine 18 and other drive components of the elevator system 10 to prevent movement of the elevator car 12.
  • the sub-safety chain 46 is connected to a remote station 50.
  • the remote station 50 is configured to detect additional fault states, such as a fault state where the key switch 32 is indicated as "closed", but the lower landing door contacts 36 are indicated as "open". Such a state is an impossibility since the key switch 32 must be opened before the landing door contacts 36 may be opened. As above, detection of such a fault results in stopping operation of the machine 18 and other drive components of the elevator system 10 to prevent movement of the elevator car 12 and thereby protect a mechanic entering the hoistway 14 from injury.

Landscapes

  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Abstract

La présente invention concerne un système d'ascenseur comprenant une gaine et une cabine d'ascenseur pouvant se déplacer le long de la gaine. Un système d'entraînement est situé dans la gaine et est raccordé fonctionnellement à la cabine d'ascenseur pour activer le déplacement de la cabine d'ascenseur le long de la gaine. Un système de sécurité pour établir un volume protégé dans la gaine comprend un support pouvant être installé dans la gaine pour empêcher le déplacement vers le bas de la cabine d'ascenseur et une pluralité de relais configurés pour détecter des défauts dans le système de commande de l'ascenseur pour empêcher le déplacement de la cabine d'ascenseur avant l'installation du support.
EP11871060.7A 2011-08-12 2011-08-12 Détection et surveillance d'accès à la cuvette inférieure Pending EP2741990A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2011/047517 WO2013025185A1 (fr) 2011-08-12 2011-08-12 Détection et surveillance d'accès à la cuvette inférieure

Publications (2)

Publication Number Publication Date
EP2741990A1 true EP2741990A1 (fr) 2014-06-18
EP2741990A4 EP2741990A4 (fr) 2015-03-25

Family

ID=47715321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11871060.7A Pending EP2741990A4 (fr) 2011-08-12 2011-08-12 Détection et surveillance d'accès à la cuvette inférieure

Country Status (2)

Country Link
EP (1) EP2741990A4 (fr)
WO (1) WO2013025185A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110002299A (zh) * 2017-12-01 2019-07-12 奥的斯电梯公司 电梯安全系统、电梯系统和操作电梯系统的方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3336032B1 (fr) 2016-12-14 2020-10-14 Otis Elevator Company Système de sécurité d'ascenseur et procédé de fonctionnement d'un système d'ascenseur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999047447A1 (fr) * 1998-03-18 1999-09-23 Kone Corporation Dispositif de securite pour ascenseur
US6138798A (en) * 1995-12-22 2000-10-31 Macuga; Henry J. Elevator safety system incorporating false pit
WO2010122211A1 (fr) * 2009-04-23 2010-10-28 Kone Corporation Agencement de sécurité d'un ascenseur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0167176B1 (ko) * 1995-04-21 1998-12-01 이희종 엘리베이터의 방범운전 방법
JPH1116071A (ja) * 1997-06-24 1999-01-22 Hitachi Ltd 故障表示制御装置
FI112640B (fi) * 2000-12-22 2003-12-31 Kone Corp Hissin turvalaite
WO2003020627A1 (fr) * 2001-09-03 2003-03-13 Inventio Ag Reaction, en fonction de la situation, en cas de derangement au niveau d'une porte d'un systeme d'ascenseur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6138798A (en) * 1995-12-22 2000-10-31 Macuga; Henry J. Elevator safety system incorporating false pit
WO1999047447A1 (fr) * 1998-03-18 1999-09-23 Kone Corporation Dispositif de securite pour ascenseur
WO2010122211A1 (fr) * 2009-04-23 2010-10-28 Kone Corporation Agencement de sécurité d'un ascenseur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2013025185A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110002299A (zh) * 2017-12-01 2019-07-12 奥的斯电梯公司 电梯安全系统、电梯系统和操作电梯系统的方法

Also Published As

Publication number Publication date
WO2013025185A1 (fr) 2013-02-21
EP2741990A4 (fr) 2015-03-25

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