EP1524232A2 - Sicherheitsvorrichtung, um auf einer Aufzugskabine zu arbeiten - Google Patents

Sicherheitsvorrichtung, um auf einer Aufzugskabine zu arbeiten Download PDF

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Publication number
EP1524232A2
EP1524232A2 EP04027990A EP04027990A EP1524232A2 EP 1524232 A2 EP1524232 A2 EP 1524232A2 EP 04027990 A EP04027990 A EP 04027990A EP 04027990 A EP04027990 A EP 04027990A EP 1524232 A2 EP1524232 A2 EP 1524232A2
Authority
EP
European Patent Office
Prior art keywords
car
detection plate
driving machine
elevator
safety device
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.)
Granted
Application number
EP04027990A
Other languages
English (en)
French (fr)
Other versions
EP1524232A3 (de
EP1524232B1 (de
Inventor
Toshiaki c/o Mitsubishi Denki K. K. Ishii
Kazumasa c/o Mitsubishi Denki K. K. Ito
Makoto c/o Mitsubishi Denki K. K. 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 DE60038579T priority Critical patent/DE60038579T2/de
Publication of EP1524232A2 publication Critical patent/EP1524232A2/de
Publication of EP1524232A3 publication Critical patent/EP1524232A3/de
Application granted granted Critical
Publication of EP1524232B1 publication Critical patent/EP1524232B1/de
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
    • B66B5/0043—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 partially overlap with the car in the vertical projection plane and 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.
  • the detection plate is provided only in the area underneath 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 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 of the present 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 of the present 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 a third embodiment of 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)
EP04027990A 2000-02-09 2000-02-09 Sicherheitsvorrichtung, um auf einer Aufzugskabine zu arbeiten Expired - Lifetime EP1524232B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE60038579T DE60038579T2 (de) 2000-02-09 2000-02-09 Sicherheitsvorrichtung, um auf einer Aufzugskabine zu arbeiten

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/JP2000/000717 WO2001058796A1 (en) 2000-02-09 2000-02-09 Safety device for work on elevator cage
EP00902881A EP1167268B1 (de) 2000-02-09 2000-02-09 Schutzgeraet, um auf einer aufzugskabine zu arbeiten

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP00902881A Division EP1167268B1 (de) 2000-02-09 2000-02-09 Schutzgeraet, um auf einer aufzugskabine zu arbeiten

Publications (3)

Publication Number Publication Date
EP1524232A2 true EP1524232A2 (de) 2005-04-20
EP1524232A3 EP1524232A3 (de) 2005-05-18
EP1524232B1 EP1524232B1 (de) 2008-04-09

Family

ID=11735671

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04027990A Expired - Lifetime EP1524232B1 (de) 2000-02-09 2000-02-09 Sicherheitsvorrichtung, um auf einer Aufzugskabine zu arbeiten
EP00902881A Expired - Lifetime EP1167268B1 (de) 2000-02-09 2000-02-09 Schutzgeraet, um auf einer aufzugskabine zu arbeiten

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP00902881A Expired - Lifetime EP1167268B1 (de) 2000-02-09 2000-02-09 Schutzgeraet, um auf einer aufzugskabine zu arbeiten

Country Status (5)

Country Link
EP (2) EP1524232B1 (de)
JP (1) JP4397559B2 (de)
DE (2) DE60038579T2 (de)
NO (1) NO20014318L (de)
WO (1) WO2001058796A1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50204457D1 (de) * 2001-11-23 2005-11-10 Inventio Ag Einrichtung zum Schutz von Wartungspersonal
JPWO2005077804A1 (ja) * 2004-02-13 2007-08-30 三菱電機株式会社 エレベータ装置
JP2005231869A (ja) * 2004-02-23 2005-09-02 Mitsubishi Electric Corp エレベータ装置
US7523809B2 (en) * 2004-04-30 2009-04-28 Otis Elevator Company Elevator top of car safety
CN101084157B (zh) * 2004-12-21 2010-04-14 奥蒂斯电梯公司 电梯安全系统及其防止人员受伤的方法
JP4839692B2 (ja) * 2005-06-28 2011-12-21 三菱電機株式会社 エレベータ釣合いおもりの上部足場装置
EP2080725B1 (de) * 2006-11-06 2015-05-20 Mitsubishi Electric Corporation Aufzugssystem
KR100898483B1 (ko) * 2007-05-02 2009-05-19 오티스 엘리베이터 컴파니 엘리베이터 장치 및 낮은 오버헤드 엘리베이터 장치에서 엘리베이터 카의 상부에 있는 사람이 상해 입는 것을 방지하는 방법
EP2328826B1 (de) 2009-09-13 2014-11-19 Yoram Madar Sicherheitsvorrichtungen für fahrstühle mit reduziertem spielraum
JP5192574B2 (ja) 2011-08-25 2013-05-08 ファナック株式会社 工具先端点の加速度または加加速度の表示部を備えた工具軌跡表示装置
DE102016015428A1 (de) * 2016-12-23 2018-06-28 Thyssenkrupp Ag Aufzugsanlage
JP6321246B1 (ja) * 2017-03-06 2018-05-09 東芝エレベータ株式会社 エレベータ保守作業支援システム
EP3424858B1 (de) 2017-07-03 2020-04-01 Otis Elevator Company Aufzugswartungsraumprojektionssysteme
EA038737B1 (ru) * 2019-02-25 2021-10-12 Открытое Акционерное Общество "Могилевский Завод Лифтового Машиностроения" (Оао "Могилевлифтмаш") Упор автоматический для подъемных механизмов
EP3702308B1 (de) * 2019-03-01 2025-07-23 Otis Elevator Company Aufzugskabine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS483961Y1 (de) * 1967-04-14 1973-01-31
JPS483961U (de) * 1971-05-31 1973-01-18
JPH0246788U (de) * 1988-09-27 1990-03-30
US5025895A (en) * 1990-01-09 1991-06-25 G.E.C. Holding Corp. Elevator car top intrusion device
JP2862713B2 (ja) * 1991-07-23 1999-03-03 株式会社東芝 エレベータの安全作業装置
JPH08113440A (ja) * 1994-10-18 1996-05-07 Mitsubishi Denki Bill Techno Service Kk エレベータのかご上作業安全装置
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
JPH11335018A (ja) * 1998-05-26 1999-12-07 Toshiba Elevator Co Ltd エレベータ

Also Published As

Publication number Publication date
JP4397559B2 (ja) 2010-01-13
DE60038579D1 (de) 2008-05-21
DE60024603D1 (de) 2006-01-12
EP1167268A1 (de) 2002-01-02
EP1167268B1 (de) 2005-12-07
DE60038579T2 (de) 2009-05-14
WO2001058796A1 (en) 2001-08-16
NO20014318D0 (no) 2001-09-05
EP1524232A3 (de) 2005-05-18
DE60024603T2 (de) 2006-08-03
NO20014318L (no) 2001-10-09
EP1167268A4 (de) 2003-01-29
EP1524232B1 (de) 2008-04-09

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