EP1281654B1 - Dispositif de commutation en mode de maintenance pour un ascenseur - Google Patents

Dispositif de commutation en mode de maintenance pour un ascenseur Download PDF

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Publication number
EP1281654B1
EP1281654B1 EP00921040A EP00921040A EP1281654B1 EP 1281654 B1 EP1281654 B1 EP 1281654B1 EP 00921040 A EP00921040 A EP 00921040A EP 00921040 A EP00921040 A EP 00921040A EP 1281654 B1 EP1281654 B1 EP 1281654B1
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EP
European Patent Office
Prior art keywords
maintenance mode
pit
personnel
switch
elevator
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.)
Expired - Lifetime
Application number
EP00921040A
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German (de)
English (en)
Other versions
EP1281654A4 (fr
EP1281654A1 (fr
Inventor
Makoto Mitsubishi Denki Kabushiki K. TOMIDOKORO
Kazumasa Mitsubishi Denki Kabushiki Kaisha ITO
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
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Mitsubishi Electric Corp
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Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1281654A1 publication Critical patent/EP1281654A1/fr
Publication of EP1281654A4 publication Critical patent/EP1281654A4/fr
Application granted granted Critical
Publication of EP1281654B1 publication Critical patent/EP1281654B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
    • 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

Definitions

  • This invention relates to an elevator system comprising a maintenance mode shifting apparatus, and more particularly to a maintenance mode shifting apparatus that shifts into a maintenance mode for improvements in the safety of maintenance of an elevator system of the machine room-less type wherein a hoist is installed within the hoistway pit.
  • Figs. 3 to 7 are views showing one example of a conventional elevator system of the machine room-less type wherein a hoist is installed within the hoistway pit.
  • the reference number 1 is a hoistway of an elevator system
  • 2 is an elevator pit located at the lower portion of the elevator hoistway, particularly below the lowermost floor
  • 3 is a hoist installed within the pit 2
  • 4 is an elevator car ascending and descending within the hoistway 1
  • 5 and 6 are return sheaves disposed in the upper section of the hoistway 1 for changing the direction of movement of a rope
  • 7 are a pair of suspension sheaves disposed underneath the elevator car 4 for driving up the elevator car 4
  • 8 is a rope passed through a sheave 11 of a counterweight 10 and then wound around the return sheave 5 disposed in the upper section of the hoistway 1, the hoist 3, the return sheave 6 and the suspension sheaves 7, with one end 9 thereof being fastened to the upper section of the hoistway 1 and the other end 12 thereof being fastened
  • the counterweight 10 is provided with a sheave 11 at the upper section.
  • 13 are a pair of rails for the elevator car guiding the elevator car 4 during ascending and descending thereof via a pair of guide shoes (not shown) attached to the elevator car 4
  • 14 are a pair of rails for the counterweight guiding the counterweight 10 via a pair of guide shoes fastened to a wall of the hoistway 1 via a pair of rail brackets (not shown).
  • 15 are a pair of buffers disposed within the pit 2 of the hoistway 1 for the elevator car 4
  • 16 are a pair of buffers for the counterweight 10.
  • 17 is a control panel provided within the pit 2 at the lower section of the hoistway 1 of the elevator system.
  • a landing entrance 18 is provided at the landing of the lower-most floor of the elevator system, and a door 19 of the landing, a three-direction door frame 20 and a door track 21 guiding the door 19 of the landing via the leg of the door are installed in the landing entrance 18.
  • the door 19 of the landing is provided with a triangular key 22 releasing the door 19 of the landing, and the door 19 can be unlocked upon the turning of the triangular key 22 to the direction shown by arrow A in Fig. 5 .
  • 23 is a push rod driven upward when the triangular key 22 is turned to the direction shown by an arrow A
  • 24 is a hanger plate for hanging via hanger rollers 27 the door 19 of the landing on a rail 26 of a hanger case 25
  • 28 is a latch fastened to the hanger plate 24 via a pivot 29.
  • the latch 28 turns to the direction shown by an arrow B upon the upward movement of the push rod 23, it is unlatched and released from the latch keeper 30.
  • Levers 31, 32 and 33 being pin-connected each other are connected to the triangular key 22, and when the triangular key 22 turns to the direction shown by the arrow A, the lever 31 also turns with the triangular key 22 to the direction, inducing the long lever 32 to move downward.
  • the lever 33 is pivotally attached via a pivot 34 to the hanger plate 24 and turns to the direction shown by an arrow D around the pivot 34 when the lever 32 moves downward.
  • a maintenance mode shift switch 35 mounted on the hanger case 25 is a maintenance mode shift switch 35.
  • 36 is a lever that is driven upward when the lever 33 turns to the direction shown by the arrow D.
  • a lever 37 pin-connected thereto turns to the direction shown by an arrow E around a pivot 39 fastened to a switch case 38, causing a switch 40 to be activated.
  • the maintenance mode shift switch 35 is activated, the maintenance mode is self-locked, thus allowing no resetting unless a reset switch 42 contained in an inspection panel 41 provided in the landing and outside the hoistway as that shown in Fig. 4 is activated.
  • 43 is a pit ladder provided for entering into the pit 2 by using the ladder and performing work in case where maintenance is to be performed within the pit 2 after releasing the door 19 of the lower-most floor landing.
  • the inspection panel 41 provided in the landing of the lower-most floor is for performing maintenance after unlocking by a special key, and disposed within the inspection panel 41 is the reset switch 42 for resetting the maintenance mode shift switch 35.
  • 44 is an illumination for illuminating the inside of the pit 2 that is energized when the maintenance mode shift switch 35 is activated.
  • the maintenance mode shift switch 35 is activated by the link mechanism involving the levers 31, 32, 33, 36 and 37 connected to the triangular key 22 and then the maintenance mode is self-locked.
  • the elevator system can be driven by no other modes than a manual speed, thus inducing a situation wherein maintenance can be performed safely because the elevator car becomes non-respondent to calls from other floors during the period of maintenance and the illumination 44 within the pit is turned on to give a brightness necessary for maintenance and also to display that the pit is safe for personnel to get in.
  • the problem of the conventional maintenance mode shifting apparatus as described above is that, even if personnel performing maintenance have been given training and education, under such circumstances as described below, the personnel could get into the pit 2 believing mistakenly by human error that the elevator system has been put in the maintenance mode although actually it is in the automatic drive mode.
  • JP-A-07041264 discloses a power isolating switch with a lamp that illuminates a working area in an elevator shaft once the switch is activated by the movement of a ladder in the elevator pit.
  • the present invention is an elevator system as defined in Claim 1.
  • the maintenance mode shift switch may detect the entrance of personnel by detecting movement caused by the weight of the personnel.
  • the weight detecting switch may be operable by a ladder that is installed within the pit and stepped on by personnel when entering into the pit. There may be guide-support means supporting the ladder for allowing a limited movement of said ladder along the hoistway wall, the switch detecting the movement of said ladder due to the weight of the personnel and shifting the elevator to a maintenance mode.
  • the maintenance mode shift switch may alternatively include a heat-sensitive switch that is provided within the pit to monitor the heat generated by personnel.
  • the reset switch may be provided within the hoistway in a position close to the entrance of the landing so that personnel can reach and operate it from the landing of the lower-most floor.
  • Figs. 1 and 2 show one embodiment of the maintenance mode shifting apparatus of the present invention.
  • an entrance 18 having a door 19, a jamb 20 and a door sill 21 is installed on a landing 50 of the lower-most floor of an elevator system, and a ladder 52 extending substantially vertically from the landing 50 of the lower-most floor down to a pit 2 is installed along a wall 51 of a hoistway 1.
  • the ladder 52 is connected at its upper ends 53 to brackets 56 fastened to the hoistway wall 51 via links 55 that are connected to the brackets 56 through pins 54 and at its lower ends 57 to brackets 60 fastened to the hoistway wall 51 via links 59 that are connected to the brackets 60 through pins 58.
  • the ladder 52 can therefore move up and down along the hoistway wall 51 substantially in parallel to the wall.
  • the links 55 and 59 are guide-support means supporting the ladder 52 in the way guiding and allowing the ladder 52 to make a limited movement along the hoistway wall 51.
  • Compression springs 61 are disposed in the space between the lower ends 57 of the ladder 52 and a floor 60 of the pit 2 so that the ladder 52 is always held in a position apart at a predetermined distance above the floor 60 of the pit 2.
  • the ladder 52 is provided at the lower ends 57 with stoppers 62, or bolts that extend from the lower ends 57 toward the floor 60 of the pit 2 and its length of protrusion from the ladder 52 is adjustable.
  • the length of protrusion of the stoppers 62 is adjusted to give gap G of a predetermined distance between each of the lower ends 57 of the ladder 52 and the floor 60 of the pit 2.
  • the strength of the compression springs 61 is at the level that usually holds the ladder 52 at the shown position, or the position providing gap G between the stoppers 62 and the floor 60 of the pit 2, but when personnel step on the ladder 52 to get into the pit 2 for maintenance, allows the ladder 52 to move downward till the stoppers 62 abut against the floor 60 of the pit 2 and thus there is no gap G as a result of the compression of the compression springs 61 by the weight of the personnel, and then makes the ladder 52 go back its original position having gap G underneath when the personnel step off the ladder.
  • the maintenance mode shifting apparatus for an elevator system includes a maintenance mode shift switch 63 of weight detecting type that is attached to the hoistway wall 51 and detects the downward movement of the ladder 52.
  • the maintenance mode shift switch 63 is a detection switch of self-holding type that is activated by the rotational movement of the links 55 connecting the ladder 52 to the hoistway wall 51.
  • the maintenance mode shift switch 63 may be provided in any position within the hoistway 1 so long as it can detect the downward movement of the ladder 52 and causes no trouble in work within the hoistway 1 or the pit 2.
  • the maintenance mode shift switch 63 is a personnel detecting means detecting the entrance of personnel into the pit 2.
  • the maintenance mode shifting apparatus for an elevator system also includes a reset switch 64 for resetting an automatic drive at a rated speed by putting the maintenance mode shift switch 63 in the off position to cancel the maintenance mode, after the maintenance mode shift switch 63 of self-holding type is activated by being brought into the on position.
  • the reset switch 64 is provided on the hoistway wall 51 within the hoistway 1 in a position close to the entrance 18 of the landing so that, after work, personnel can reach and operate after getting out of the hoistway 1 and stepped up onto the landing 50 of the lower-most floor via the ladder 52.
  • the reset switch 64 provided within the elevator hoistway 1 cannot be operated from the landing 50 when the elevator landing door 19 is closed.
  • a lock mechanism comprising the triangular key 22, the push rod 23, the latch 28 and the latch keeper 30 as exemplified in Fig. 5 is first unlocked on the landing 50 of the lower-most floor.
  • the maintenance mode shifting apparatus for an elevator system according to the present invention includes neither a link mechanism comprising the links 31, 32, 33, 36 and 37 shown in Fig. 5 nor the maintenance mode shift switch 35 to be activated by this link mechanism.
  • the ladder 52 moves downward due to the compression of the compression springs 61 by the weight of personnel, and remains at the position where the stoppers 62 abut against the floor 60 of the pit 2, resulting in the downward movement of the ladder 52 by the distance corresponding to gap G.
  • the ladder 52 neither shows an unstable movement nor induces anxiety in personnel because the ladder 52 is guided and supported by a guide-support means comprising members including the links 55 and 59 in the way allowing a limited movement along the hoistway wall 51.
  • the downward movement of the ladder 52 causes a rotating movement of the links 55 and 59 along the direction shown by an arrow F in Fig.
  • the elevator driving mode is put in a maintenance mode as by the conventional maintenance procedures shown in Fig. 7 .
  • the elevator system is driven not automatically at a rated speed but at a manual speed, and the inside of the pit 2 is illuminated by the light 44 for maintenance.
  • the ladder 52 moves upward and gets back to its original position shown in Fig. 1 by the action of the compression springs 61.
  • the maintenance mode shift switch 63 also returns to the off position, the maintenance mode is maintained because the reset switch 64 is not turned on.
  • the maintenance mode shift switch 63 is pushed back to the on position again with the downward movement of the ladder 52 caused by the stepping up again of the ladder 52 by the personnel getting out of the pit 2 after finishing maintenance, the action of the entire maintenance mode shifting mechanism of the elevator system remains unaffected because the maintenance mode is maintained.
  • the maintenance mode still continues even when the ladder 52 gets back to its original position shown in Fig. 1 after the personnel has stepped off the ladder 52 and ascended on the landing 50 because the reset switch 64 is not turned on.
  • personnel Upon completion of maintenance, personnel reach the reset switch 64 provided on the hoistway wall 51 from the landing 50 installed outside the hoistway and operate the switch to reset an automatic rated speed drive by canceling the maintenance mode, thus making the elevator system provide a normal service to elevator riders
  • the elevator system maintenance mode shifting apparatus also includes, for a shift to a maintenance mode, a heat-sensitive switch 65 as another maintenance mode shift switch detecting the entrance of personnel into the pit 2 beside the switch 63 detecting the entrance of personnel by sensing the weight of the personnel on the ladder 52.
  • the heat-sensitive switch 65 is provided on the hoistway wall 51 facing the pit 2, functions as a heat-sensitive sensor, and is enabled to monitor the heat generated by personnel in almost whole area of the floor of the pit 2 and to ensure the detection of the presence of personnel within the pit 2. In this mechanism using both the heat-sensitive switch 65 and the switch 63 of weight-sensing type, an improved reliability of its action can be expected.
  • These maintenance mode shift switches can be used separately.
  • the heat-sensitive switch 65 solely as a maintenance mode shift switch fasten the ladder 52 to the hoistway wall 51 and connect the heat-sensitive switch 65 to an electric circuit instead of the switch 63 detecting the downward movement of the ladder 52.
  • an elevator system maintenance mode shifting apparatus is advantageous, particularly for an improvement in the safety of maintenance of an elevator system wherein a hoist is installed within the hoistway pit and no machine room is provided, in that it can prevent maintenance personnel from entering into the pit by error by directly detecting the entrance of personnel into the pit, and by shifting the elevator operation mode to maintenance mode.

Landscapes

  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Elevator Control (AREA)

Abstract

Dispositif de commutation en mode de maintenance pour un ascenseur, capable de commuter automatiquement un mode de fonctionnement d'ascenseur en mode de maintenance d'ascenseur pour empêcher un technicien d'entrer dans la cuvette (2) sans commuter le mode de fonctionnement en mode de maintenance. Ledit dispositif comporte un commutateur (63) sélecteur de mode de maintenance et un commutateur de remise à l'état initial (64). Le commutateur (63) sélecteur de mode de maintenance commute le mode de fonctionnement en mode de maintenance en cas de détection de l'entrée du technicien dans la cuvette (2) et maintient cet état, et le commutateur de remise à l'état initial (64), qui a pour fonction de remettre à l'état initial le commutateur (63) sélecteur de mode de maintenance, est installé dans une cage (1) et ne peut être actionné depuis une plate-forme (50) lorsque la porte palière est fermée. La présente invention concerne un procédé permettant de détecter l'entrée du technicien qui consiste par exemple à détecter un poids ou une température et lorsque l'entrée est détectée par une détection de poids, un procédé utilisé de préférence est un procédé selon lequel le mouvement d'une échelle (52) que le technicien utilise lorsqu'il entre dans la cuvette (2), causé par le poids du technicien, est détecté par le commutateur sélecteur (63) de mode de maintenance.

Claims (5)

  1. Système d'ascenseur, comprenant:
    un dispositif de commutation en mode de maintenance, comprenant :
    un commutateur en mode de maintenance (63, 65) du type à auto-maintien, pour détecter l'entrée de personnel dans la fosse d'ascenseur (2) de la cage d'ascenseur (1) et assurer la commutation en mode de maintenance en vue de commuter le mode opérationnel du système d'ascenseur dans le mode de maintenance ; et
    un commutateur de réinitialisation (64), agencé dans la cage de l'ascenseur (1) pour réinitialiser ledit commutateur en mode de maintenance, ne pouvant pas être actionné à partir d'un palier (50) lorsqu'une porte (19) du palier (50) d'ascenseur est fermée.
  2. Système d'ascenseur selon la revendication 1, dans lequel ledit commutateur en mode de maintenance est un commutateur à détection du poids (63), détectant l'entrée de personnel en détectant un mouvement entraîné par le poids du personnel.
  3. Système d'ascenseur selon les revendications 1 ou 2, dans lequel ledit commutateur à détection du poids (63) peut être actionné par l'intermédiaire d'une échelle (52) installée dans la fosse (2), empruntée par le personnel lors de l'entrée dans la fosse, un moyen de support de guidage (56, 60), supportant l'échelle pour permettre un déplacement limité de ladite échelle le long du mur de la cage, et un commutateur de détection, détectant le déplacement de ladite échelle entraîné par le poids du personnel, et commutant l'ascenseur en mode de maintenance.
  4. Système d'ascenseur selon l'une quelconque des revendications 1 à 3, dans lequel ledit commutateur en mode de maintenance (65) englobe un commutateur sensible à la chaleur, agencé dans la fosse (2) et surveillant la chaleur générée par le personnel.
  5. Système d'ascenseur selon l'une quelconque des revendications 1 à 4, dans lequel ledit commutateur de réinitialisation (64) est agencé dans la cage (1) dans une position proche de l'entrée du palier (50), de sorte que le personnel peut l'atteindre et l'actionner à partir du palier de l'étage le plus bas.
EP00921040A 2000-04-26 2000-04-26 Dispositif de commutation en mode de maintenance pour un ascenseur Expired - Lifetime EP1281654B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/002741 WO2001081225A1 (fr) 2000-04-26 2000-04-26 Dispositif de commutation en mode de maintenance pour un ascenseur

Publications (3)

Publication Number Publication Date
EP1281654A1 EP1281654A1 (fr) 2003-02-05
EP1281654A4 EP1281654A4 (fr) 2009-06-03
EP1281654B1 true EP1281654B1 (fr) 2012-05-09

Family

ID=11735972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00921040A Expired - Lifetime EP1281654B1 (fr) 2000-04-26 2000-04-26 Dispositif de commutation en mode de maintenance pour un ascenseur

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EP (1) EP1281654B1 (fr)
WO (1) WO2001081225A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10889465B2 (en) 2017-07-31 2021-01-12 Otis Elevator Company Mechanical hoistway access control device

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10108772A1 (de) * 2001-02-23 2002-11-21 Otis Elevator Co Aufzugssicherheitseinrichtung
JP5037330B2 (ja) * 2006-10-04 2012-09-26 三菱電機株式会社 エレベータ装置
US20130025975A1 (en) * 2010-04-12 2013-01-31 Otis Elevator Company Retractable Stop for Low Overhead Elevators
JP2012115081A (ja) * 2010-11-26 2012-06-14 Toshiba Elevator Co Ltd エレベータのファン異常検出装置
KR101405169B1 (ko) * 2012-09-21 2014-06-13 티센크루프엘리베이터코리아 주식회사 엘리베이터 카 상부용 자동 안전 시스템
EP2765108A1 (fr) * 2013-02-06 2014-08-13 Kone Corporation Procédé de fourniture d'accès à un puits dans un ascenseur
EP3292063B1 (fr) 2015-05-07 2021-07-14 Otis Elevator Company Commande d'accès de cage d'ascenseur de système d'ascenseur
CN107473061B (zh) 2016-06-08 2020-10-16 奥的斯电梯公司 升降电梯系统的维护安全装置及其操作方法
EP3409627B1 (fr) * 2017-05-29 2019-07-03 KONE Corporation Procédé de commande d'un éclairage d'ascenseur et ascenseur
ES2817402T3 (es) 2017-06-22 2021-04-07 Otis Elevator Co Dispositivos de seguridad del bloqueo de la puerta del dintel del ascensor
US11072515B2 (en) 2018-03-27 2021-07-27 Otis Elevator Company Automated elevator maintenance mode initiation
JP6657301B2 (ja) * 2018-06-04 2020-03-04 東芝エレベータ株式会社 エレベータの点検システム

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
JPH0622700Y2 (ja) * 1987-05-26 1994-06-15 株式会社日立ビルシステムサービス エレベ−タ安全装置
JPH0741264A (ja) * 1993-07-29 1995-02-10 Toshiba Corp エレベータのピット点検用タラップ
JPH07237838A (ja) * 1994-02-24 1995-09-12 Mitsubishi Denki Bill Techno Service Kk エレベータの重り接近警報装置
JPH09227045A (ja) * 1996-02-23 1997-09-02 Toshiba Elevator Eng Kk エレベーターピット点検用の梯子装置
WO1998052859A1 (fr) * 1997-05-17 1998-11-26 Thielow Frank W Ascenseur sans cage
JPH11162662A (ja) * 1997-11-27 1999-06-18 Mitsubishi Electric Building Techno Service Co Ltd エレベータのピット内作業灯装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10889465B2 (en) 2017-07-31 2021-01-12 Otis Elevator Company Mechanical hoistway access control device

Also Published As

Publication number Publication date
EP1281654A4 (fr) 2009-06-03
EP1281654A1 (fr) 2003-02-05
WO2001081225A1 (fr) 2001-11-01

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