[go: up one dir, main page]

EP1431228B1 - Dispositif de sécurité pour travailler sur une cage d'ascenseur - Google Patents

Dispositif de sécurité pour travailler sur une cage d'ascenseur Download PDF

Info

Publication number
EP1431228B1
EP1431228B1 EP04006916.3A EP04006916A EP1431228B1 EP 1431228 B1 EP1431228 B1 EP 1431228B1 EP 04006916 A EP04006916 A EP 04006916A EP 1431228 B1 EP1431228 B1 EP 1431228B1
Authority
EP
European Patent Office
Prior art keywords
car
driving machine
elevator
safety device
raising
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
EP04006916.3A
Other languages
German (de)
English (en)
Other versions
EP1431228A2 (fr
EP1431228A3 (fr
Inventor
Toshiaki Ishii
Kazumasa Ito
Makoto Tomidokoro
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
Priority to EP04006916.3A priority Critical patent/EP1431228B1/fr
Priority claimed from EP00902881A external-priority patent/EP1167268B1/fr
Publication of EP1431228A2 publication Critical patent/EP1431228A2/fr
Publication of EP1431228A3 publication Critical patent/EP1431228A3/fr
Application granted granted Critical
Publication of EP1431228B1 publication Critical patent/EP1431228B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B66B5/0043—Devices enhancing safety during maintenance
    • B66B5/005—Safety of maintenance personnel
    • B66B5/0081—Safety of maintenance personnel by preventing falling by means of safety fences or handrails, being operable or not, mounted on top of the elevator car
    • 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 a safety device for working on top of an elevator car, which is employed in an elevator in which a driving machine is disposed at an upper portion of a hoistway, and which prevents a worker from colliding against the driving machine while working on top of the car.
  • Fig. 13 is a side view showing a conventional elevator such as disclosed, for example, in EP0926093A
  • Fig. 14 is a plan view showing the elevator in Fig. 13 .
  • a driving machine 2 having a sheave 3 is fixed to an upper portion of a hoistway 1.
  • a middle portion of a main rope 4 is wound around the sheave 3.
  • a car 5 and a counterweight 6 are suspended by the main rope 4.
  • a pair of car suspending sheaves 7 around which the main rope 4 is wound are provided at a bottom portion of the car 5.
  • a counterweight suspending sheave 8 around which the main rope 4 is wound is provided at a top portion of the counterweight 6.
  • the car 5 is provided with car doors 9. Landing doors 10 opposing the car doors 9 are provided on a hall side.
  • a door machine 11 for opening/closing the car doors 9 and the landing doors 10 is mounted on a top portion of the car 5. Also, a fence 12 for restricting the area of movement for a worker while working on top of the car 5 is erected on the top portion of the car 5.
  • a portion of the driving machine 2 is disposed in an area where the car 5 is projected in its raising and lowering direction.
  • a portion of the driving machine 2 overlaps the car 5 when looked at from above. Accordingly, a fear exists that a worker may run into the driving machine 2 while working on top of the car 5. To prevent this, the worker is kept from entering an area S1 directly below the driving machine 2 by providing the fence 12.
  • Fig. 15 is a side view showing a conventional elevator such as disclosed, for example, in Japanese Utility Model Publication No. 48-3961
  • Fig. 16 is a plan view showing the elevator in Fig. 15 .
  • a ceiling detection plate 14 is suspended from a ceiling portion of the hoistway 1 through a plurality of hangers 13.
  • the ceiling detection plate 14 spreads above the whole car 5, the area S3 can not be used for maintenance space, and there is problem that maintenance work on the driving machine 2 can not be performed from the top of the car 5. Further, it is necessary to heighten the ceiling of the hoistway 1 to permit the worker to stand on the car 5 when the car 5 moves to the uppermost floor, thereby inhibiting effective utilization of space in the building.
  • Fig. 17 is a side view showing a conventional elevator such as disclosed, for example, in Japanese Patent No. 2862713
  • Fig. 18 is a plan view showing the elevator in Fig. 17 .
  • a plurality of chains 15 are suspended from the driving machine 2.
  • the present invention is made to solve the problems mentioned above, and an object of the present invention is to provide a safety device for working on top of an elevator car, wherein a working space on a car can be secured, maintenance on a driving machine can be performed from the top of the car, and workers can be more safely kept from running into the driving machine.
  • a safety device for working on top of an elevator car employed in an elevator in which a driving machine for raising and lowering a car is disposed at an upper portion in a hoistway and a portion of the driving machine is disposed in an area where the car is projected in its raising and lowering direction, comprising: a detection plate suspended in the hoistway and disposed between the driving machine and the car to allow maintenance operations from a top of the car, the detection plate being capable of moving upwardly by being pushed from a lower position; a buffer attached to a bottom surface of the detection plate; a plurality of detecting switches for detecting the upward movement of the detection plate; and a stop circuit for stopping the raising of the car when at least one of the detecting switches is operated by the upward movement of the detection plate.
  • a safety device for working on top of an elevator car employed in an elevator in which a driving machine for raising and lowering a car is disposed at an upper portion of a hoistway and a portion of the driving machine is disposed in an area where the car is projected in its raising and lowering direction, comprising: a light projecting device provided on a side wall of the hoistway for horizontally projecting a plurality of light beams below the driving machine; a light receiving device provided on a side wall of the hoistway opposite to the light projecting device for receiving the light beams projected from the light projecting device; and a stop circuit for stopping the raising of the car when at least one of the light beams is intercepted.
  • Fig. 1 is a side view showing an elevator according to a first embodiment for a better understanding but not being part of the claimed invention
  • Fig. 2 is a plan view showing the elevator in Fig. 1
  • a driving machine 21 is fixed to an upper portion of a hoistway 1.
  • the driving machine 21 has a motor 22, a sheave 23 rotated by the motor 22, reduction gears 24 for transmitting the driving force of the motor 22 to the sheave 23, and a braking portion 25 for braking the rotation of the sheave 23.
  • a middle portion of a main rope 4 is wound around the sheave 23.
  • a car 5 and a counterweight 6 are suspended by the main rope 4.
  • a pair of car suspending sheaves 7 around which the main rope 4 is wound are provided at a lower portion of the car 5.
  • a counterweight suspending sheave 8 around which the main rope 4 is wound is provided at a top portion of the counterweight 6.
  • the car 5 is provided with car doors 9. Landing doors 10 opposing the car doors 9 are provided on a hall side. A door machine 11 for opening/closing the car doors 9 and the landing doors 10 is mounted on a top portion of the car 5.
  • a safety device 31 for working on top of the car 5 for preventing workers on the car 5 from running into the driving machine 21 is suspended from a ceiling portion of the hoistway 1.
  • the safety device 31 is disposed at a position between the car 5 and the driving machine 21 where it does not interfere with the car 5.
  • the safety device 31 has a plurality of (four in the figure) hangers 32, a detection plate 33 suspended by the hangers 32, a plurality of detecting switches 34 disposed between the hangers 32 and the detection plate 33, and an air bag 35 attached as a buffer to a bottom portion of the detection plate 33.
  • Fig. 3 is a cross-sectional view showing an essential portion of the safety device 31 in Fig. 1 .
  • the detection plate 33 is provided with a plurality of penetrating holes 33a.
  • Each detecting switch 34 has a first contact seat 36 made of insulating material and connected to a lower end portion of the hanger 32, a second contact seat 37 made of insulating material and fixed to the detection plate 33, a first contact 38 fixed to the first contact seat 36, and a second contact 39 fixed to the second contact seat 37 and contacting with and separating from the first contact 38.
  • the second contact seat 37 and the second contact 39 are provided with penetrating holes 37a and 39a continued to the penetrating hole 33a.
  • the first contact seat 36 has a flange portion 36a for supporting the first contact 38, and a rod portion 36b penetrating the penetrating holes 33a, 37a and 39a.
  • Fig. 4 is a cross-sectional view showing a state where the air bag 35 in Fig. 3 is pushed from the lower position.
  • the air bag 35 is deformed and the detection plate 33 is pushed upwardly. Accordingly, the second contact seat 37 and the second contact 39 fixed to the detection plate 33 are moved upwardly to separate the second contact 39 from the first contact 38.
  • Fig. 5 is a circuit diagram showing a control circuit of the safety device 31 in Fig. 1 .
  • Contacts 34A to 34D of four detecting switches 34 are connected in series with each other. Since the contacts 34A to 34D are normally-closed contacts, when any one of the contacts 34A to 34D is opened, the raising of the car 5 is stopped by a stopping circuit 40.
  • the workers can be more safely prevented from colliding against the driving machine 21.
  • the working area S2 on the car 5 can be sufficiently secured, and maintenance for the driving machine 21 can be performed from the top of the car 5.
  • the air bag 35 is used, the impact of collision against the safety device 21 can be sufficiently decreased, thereby further improving safety.
  • a plurality of detecting switches 34 are provided and the raising of the car 5 is stopped when any one of the detecting switches 34 is operated, reliability can be improved.
  • the buffer is not limited to this, and it is also possible to use, for example, sponge, foamed plastic or the like.
  • Fig. 6 is a plan view showing a safety device for working on top of an elevator car according to a second embodiment for a better understanding but not being part of the claimed invention
  • Fig. 7 is a side view showing the safety device in Fig. 6 .
  • an oil receiving portion 41a shaped like a tray is provided at a top surface of the detection plate 41.
  • the other constructions are the same as in the first embodiment.
  • any lubricating oil leaking from the reduction gears 24, bearings (not shown) or the like of the driving machine 21 is received by the oil receiving portion 41a. Accordingly, the lubricating oil is prevented from dropping onto the car 5.
  • Fig. 8 is a side view showing an elevator according to the present invention
  • Fig. 9 is a plan view showing the elevator in Fig. 8
  • a photoelectric proximity detecting device having a light projecting device 51 and a light receiving device 52 is used as a safety device.
  • the light projecting device 51 and the light receiving device 52 are provided on the side walls of the hoistway 1 to oppose each other.
  • a plurality of light beams 53 projected from the light projecting device 51 travel horizontally below the driving machine 21 and are received by the light receiving device 52.
  • the light projecting device 51 and the light receiving device 52 are disposed at positions lower than the driving machine 21.
  • the construction of the rest of the elevator is the same as in the first embodiment.
  • Fig. 10 is a circuit diagram showing the control circuit of the safety device in Fig. 8 .
  • An output contact 54 of the photoelectric proximity detecting device is connected to the stopping circuit 40 for stopping the raising of the car 5.
  • the workers can be more safely prevented from colliding against the driving machine 21.
  • the working area S2 on the car 5 can be sufficiently secured, and maintenance for the driving machine 21 can be performed from the top of the car 5.
  • the worker since the worker only intercepts the light beams 53, the worker receives no impact from a collision.
  • the plurality of detecting light beams 53 is projected and the raising of the car 5 is stopped when any portion of the light beams 53 is intercepted, reliability can be improved.

Landscapes

  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)

Claims (2)

  1. Ascenseur dans lequel une machine d'entraînement (21) pour monter et abaisser une cabine (5) est disposée au niveau d'une partie supérieure d'une cage d'ascenseur (1) et une partie de la machine d'entraînement (21) est disposée dans une zone où la cabine (5) est projetée dans sa direction de montée et de descente, l'ascenseur comprenant en outre un dispositif de sécurité pour travailler en haut de la cabine (5),
    caractérisé par le dispositif de sécurité comprenant :
    un dispositif de projection de lumière (51) prévu sur une paroi latérale de la cage d'ascenseur (1) pour projeter horizontalement une pluralité de faisceaux lumineux (53) en-dessous de la machine d'entraînement (21) ;
    un dispositif de réception de lumière (52) prévu sur une paroi latérale de la cage d'ascenseur (1) de manière opposée audit dispositif de projection de lumière (51) pour recevoir les faisceaux lumineux (53) projetés à partir dudit dispositif de projection de lumière (51) ; et
    un circuit d'arrêt (40) pour arrêter la montée de la cabine (5) lorsqu'au moins l'un des faisceaux lumineux (53) est intercepté.
  2. Procédé permettant de fournir un dispositif de sécurité pour travailler en haut d'une cabine d'ascenseur, le dispositif de sécurité étant utilisé dans un ascenseur dans lequel une machine d'entraînement (21) pour monter et abaisser une cabine (5) est disposée au niveau d'une partie supérieure d'une cage d'ascenseur (1) et une partie de la machine d'entraînement (21) est disposée dans une zone où la cabine (5) est projetée dans sa direction de montée et de descente,
    le dispositif de sécurité comprenant un dispositif de projection de lumière (51) et un dispositif de réception de lumière (52),
    le procédé comprenant les étapes qui consistent à prévoir le dispositif de projection de lumière (51) sur une paroi latérale de la cage d'ascenseur (1) pour projeter l'horizontalement une pluralité de faisceaux lumineux (53) en-dessous de la machine d'entraînement (21) ; et
    à prévoir le dispositif de réception de lumière (52) sur une paroi latérale de la cage d'ascenseur (1) de manière opposée audit dispositif de projection de lumière (51) pour recevoir les faisceaux lumineux (53) projetés à partir dudit dispositif de projection de lumière (51) ;
    où le dispositif de sécurité comprend en outre un circuit d'arrêt (40) pour arrêter la montée de la cabine (5) lorsqu'au moins l'un des faisceaux lumineux (53) est intercepté.
EP04006916.3A 2000-02-09 2000-02-09 Dispositif de sécurité pour travailler sur une cage d'ascenseur Expired - Lifetime EP1431228B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04006916.3A EP1431228B1 (fr) 2000-02-09 2000-02-09 Dispositif de sécurité pour travailler sur une cage d'ascenseur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00902881A EP1167268B1 (fr) 2000-02-09 2000-02-09 Dispositif de securite pour travailler sur une cage d'ascenseur
EP04006916.3A EP1431228B1 (fr) 2000-02-09 2000-02-09 Dispositif de sécurité pour travailler sur une cage d'ascenseur

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP00902881A Division EP1167268B1 (fr) 2000-02-09 2000-02-09 Dispositif de securite pour travailler sur une cage d'ascenseur

Publications (3)

Publication Number Publication Date
EP1431228A2 EP1431228A2 (fr) 2004-06-23
EP1431228A3 EP1431228A3 (fr) 2004-11-03
EP1431228B1 true EP1431228B1 (fr) 2013-11-20

Family

ID=32337987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04006916.3A Expired - Lifetime EP1431228B1 (fr) 2000-02-09 2000-02-09 Dispositif de sécurité pour travailler sur une cage d'ascenseur

Country Status (1)

Country Link
EP (1) EP1431228B1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4885975B2 (ja) * 2006-11-06 2012-02-29 三菱電機株式会社 エレベータ装置
EP3424858B1 (fr) * 2017-07-03 2020-04-01 Otis Elevator Company Systèmes de projection d'espace d'entretien d'un ascenseur
US10983210B2 (en) 2017-09-25 2021-04-20 Otis Elevator Company Elevator sensor array system
WO2021234119A1 (fr) * 2020-05-20 2021-11-25 Tk Elevator Innovation And Operations Gmbh Système d'ascenseur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0246788U (fr) * 1988-09-27 1990-03-30
US5025895A (en) * 1990-01-09 1991-06-25 G.E.C. Holding Corp. Elevator car top intrusion device
US6488124B1 (en) * 1997-09-26 2002-12-03 Kabushiki Kaisha Toshiba Elevator
ATE200067T1 (de) * 1997-11-28 2001-04-15 Thyssen Aufzugswerke Gmbh Aufzug, insbesondere treibscheibenaufzug

Also Published As

Publication number Publication date
EP1431228A2 (fr) 2004-06-23
EP1431228A3 (fr) 2004-11-03

Similar Documents

Publication Publication Date Title
EP1167268B1 (fr) Dispositif de securite pour travailler sur une cage d'ascenseur
US8177035B2 (en) Elevator system which controls a value of overspeed
KR101748475B1 (ko) 멀티 카식 엘리베이터
US11014781B2 (en) Elevator safety system and method of monitoring an elevator system
JPWO2001058796A1 (ja) エレベータのかご上作業安全装置
JP2002255460A (ja) エレベータシステムの運行制御方法および運行制御装置
US20190389695A1 (en) Elevator system
EP1431228B1 (fr) Dispositif de sécurité pour travailler sur une cage d'ascenseur
EP1020393B1 (fr) Ascenseur
JP7147900B1 (ja) エレベータ
CN109850714B (zh) 电梯
JP2006044889A (ja) 避難用エレベータ装置
JP4248678B2 (ja) エレベータ装置
JPH082844A (ja) エレベーター釣合鎖用安全装置
JP2007331902A (ja) エレベータの制御装置
JP6631414B2 (ja) エレベータ装置
KR100420027B1 (ko) 엘리베이터 조속기용 링크구조
JP2009161332A (ja) エレベータの安全装置
JPH0617195B2 (ja) 屋外展望用エレベ−タの群管理装置
JPS6129308B2 (fr)
JPS606060Y2 (ja) エレベ−タの地震時救出運転装置
JPH02182685A (ja) 工事用エレベータの安全装置
KR20000025903A (ko) 지진에 의한 균형추의 가이드 레일 탈선 방지장치 및 방법
JPH0537843U (ja) エレベータの防煙装置
JPH0741263A (ja) エレベータの安全装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040324

AC Divisional application: reference to earlier application

Ref document number: 1167268

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB NL

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TOMIDOKORO, MAKOTO

Inventor name: ISHII, TOSHIAKI

Inventor name: ITO, KAZUMASA

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB NL

AKX Designation fees paid

Designated state(s): DE FR GB NL

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MITSUBISHI DENKI KABUSHIKI KAISHA

17Q First examination report despatched

Effective date: 20120118

R17C First examination report despatched (corrected)

Effective date: 20120118

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20130613

INTG Intention to grant announced

Effective date: 20130618

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 1167268

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 60048348

Country of ref document: DE

Effective date: 20140116

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20131120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 60048348

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20140821

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140220

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20141031

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 60048348

Country of ref document: DE

Effective date: 20140821

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140220

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140228

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 60048348

Country of ref document: DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20180214

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60048348

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190903