EP1352869A1 - Notbremseinrichtung für aufzug - Google Patents

Notbremseinrichtung für aufzug Download PDF

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Publication number
EP1352869A1
EP1352869A1 EP00985996A EP00985996A EP1352869A1 EP 1352869 A1 EP1352869 A1 EP 1352869A1 EP 00985996 A EP00985996 A EP 00985996A EP 00985996 A EP00985996 A EP 00985996A EP 1352869 A1 EP1352869 A1 EP 1352869A1
Authority
EP
European Patent Office
Prior art keywords
sheave
roller
car
disk
guide body
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.)
Withdrawn
Application number
EP00985996A
Other languages
English (en)
French (fr)
Other versions
EP1352869A4 (de
Inventor
Kazumasa 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
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 EP1352869A1 publication Critical patent/EP1352869A1/de
Publication of EP1352869A4 publication Critical patent/EP1352869A4/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
    • 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
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect

Definitions

  • the present invention relates to an emergency brake apparatus for an elevator, which stops the ascent of an elevator car when the car is ascending at an abnormal speed.
  • a brake apparatus in which a wedge-shaped braking member is pushed in between a sheave and a peripheral member thereof, whereby a main rope is held between the sheave and the braking member.
  • a wedge-shaped braking member is pushed in between a sheave and a peripheral member thereof, whereby a main rope is held between the sheave and the braking member.
  • the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain an emergency brake apparatus for an elevator which can promptly generate braking force and can safely stop a car with a simple and compact structure when the car is ascending at an abnormal speed.
  • an emergency brake apparatus for an elevator which is provided in the elevator including a rotatable sheave disposed in an upper portion of a hoistway, a main rope wound around the sheave, and a car and a counterweight which are suspended from the main rope, for stopping the car when the car is ascending at a speed greater than a predetermined speed
  • the apparatus comprising: a guide body facing an outer circumferential surface of the sheave; a roller capable of reciprocating along the guide body between a braking position where the roller fits in between the guide body and the sheave and a release position where the roller is separated from the sheave; biasing means for biasing the roller toward the braking position; and holding means for holding the roller at the release position against the biasing means and for releasing the holding of the roller when the car is ascending at a speed greater than the predetermined speed.
  • an emergency brake apparatus for an elevator which is provided in the elevator including a rotatable sheave disposed in an upper portion of a hoistway, a main rope wound around the sheave, and a car and a counterweight which are suspended from the main rope, for stopping the car when the car is ascending at a speed greater than a predetermined speed
  • the apparatus comprising: a disk which is arranged coaxially with the sheave and is in frictional-contact with the sheave, the disk being rotated together with the sheave; a guide body facing an outer circumferential surface of the disk; a roller capable of reciprocating along the guide body between a braking position where the roller fits in between the guide body and the disk and a release position where the roller is separated from the disk; biasing means for biasing the roller toward the braking position; and holding means for holding the roller at the release position against the biasing means and for releasing the holding of the roller when the car is ascending at a speed greater than the pre
  • Fig. 1 is a structural diagram showing an elevator having an emergency brake apparatus in accordance with Embodiment 1 of the present invention.
  • Fig. 2 is a structural diagram in which a main part in Fig. 1 is enlarged.
  • Fig. 3 is a cross-sectional view taken along a line III-III in Fig. 2.
  • Fig. 4 is a cross-sectional view taken along a line IV-IV in Fig. 3.
  • an upper portion of a hoistway 1 is provided with a machine room 2.
  • a machine base 3 is installed in the machine room 2.
  • a hoisting machine 4 and a deflector wheel 5 are mounted to the machine base 3.
  • a main rope 6 is wound around a driving sheave 4a of the hoisting machine 4 and the deflector wheel 5.
  • a car 7 is suspended from one end portion of the main rope 6 .
  • a counterweight 8 is suspended from the other end portion of the main rope 6.
  • the emergency brake apparatus 9 which brakes the driving sheave 4a to stop the car 7 when the car 7 ascends at a speed greater than a predetermined speed.
  • the emergency brake apparatus 9 has: a guide body 11 opposed to an outer circumferential surface of the driving sheave 4a; a roller 12 that can reciprocate along the guide body 11; a plunger 13 connected with the roller 12; a solenoid coil 14 as a holding means that surrounds the plunger 13; and a spring 15 as a biasing means that is arranged between the plunger 13 and the solenoid coil 14.
  • the roller 12 is reciprocated between a braking position (broken line in Fig. 4) where the roller 12 fits in between the guide body 11 and the driving sheave 4a and a release position (solid line in Fig. 4) where the roller 12 is separated from the driving sheave 4a.
  • the spring 15 biases the roller 12 toward the braking position.
  • the solenoid coil 14 is energized to attract the plunger 13 so as to hold the roller 12 at the release position against the spring 15. Further, when the car 7 ascends at a speed greater than a predetermined speed, energization to the solenoid coil 14 is interrupted, and the attraction to the plunger 13 is released.
  • Fig. 5 is a front view showing the roller in Fig. 2
  • Fig. 6 is a side view showing the roller in Fig. 5.
  • the outer circumferential surface of the roller 12 is subjected to surface roughening, whereby the friction coefficient is raised. Thus, sufficient braking force to the driving sheave 4a is secured.
  • Traveling speed of the car 7 is always detected by, for example, an encoder (not shown) or the like which is provided in the hoisting machine 4. If the traveling speed of the car 7 is normal, the roller 12 is held at the release position by electromagnetic force of the solenoid coil 14.
  • the abnormal speed at the time of ascent is accelerated gently by the difference in weight between the car 7 and the counterweight 8, or the like, different from the time of descent. Therefore, if a set speed is set low, the car 7 can be stopped before it reaches high speed. Thus, it is possible to use the rapid type emergency brake apparatus 9, and the structure can be made simple and compact.
  • the emergency brake apparatus 9 can be operated when the car 7 reaches a floor and stops, whereby the car 7 can be prevented from ascending due to trouble in the brake apparatus (not shown) of the hoisting machine 4, or the like while waiting at a floor.
  • the brake apparatus of the hoisting machine 4 and the emergency brake apparatus 9 serve as double brakes.
  • the emergency brake apparatus 9 can be operated while the brake apparatus of the hoisting machine 4 is disassembled to conduct maintenance work. Accordingly, maintenance work can be facilitated.
  • Fig. 7 is a cross-sectional view of an emergency brake apparatus in accordance with Embodiment 2 of the present invention
  • Fig. 8 is a cross-sectional view taken along a line VIII-VIII in Fig. 7.
  • a ring-shaped disk 16 is in frictional-contact with an end surface of a driving sheave 4a.
  • the disk 16 is arranged coaxially with the driving sheave 4a, and is rotated with the driving sheave 4a. Further, the disk 16 is sandwiched between a ring-shaped pressure plate 17 and the driving sheave 4a.
  • the end surface of the driving sheave 4a is threadedly attached with a plurality of bolts 18 bored through the pressure plate 17.
  • a spring 19, which pushes the disk 16 against the driving sheave 4a through the pressure plate 17, is provided between the head portion of each of the bolts 18 and the pressure plate 17. The frictional force between the disk 16 and the driving sheave 4a is adjusted in accordance with the amount of tightening of the bolts 18.
  • An emergency brake apparatus 20 in Embodiment 2 has a guide body 11, a roller 12, a plunger 13, a solenoid coil 14, a spring 15, the disk 16, the pressure plate 17, the bolts 18, and the spring 19.
  • Other structures of the apparatus are identical with those in Embodiment 1.
  • the roller 12 is pushed in between the disk 16 and the guide body 11 during the operation, and the rotation of the disk 16 is promptly stopped.
  • the disk 16 is in frictional-contact with the driving sheave 4a, the driving sheave 4a is not stopped promptly, receives braking force in accordance with frictional force, and is decelerated to thereby come to a stop.
  • the car 7 can be stopped safely with a constant braking force.
  • the roller 12 is arranged such that the rotation of the driving sheave 4a in the direction at the time when the car 7 ascends is stopped.
  • a brake apparatus having a roller that stops the rotation of the driving sheave 4a in the direction when the car 7 is descending.
  • the car 7 can also be prevented from descending due to the trouble in the brake apparatus of the hoisting machine 4, or the like while the car 7 touches the floor. Further, irrespective of the weight balance between the car 7 and the counterweight 8, the rotation of the driving sheave 4a in both directions is regulated, so that the brake apparatus of the hoisting machine 4 can be disassembled to conduct maintenance work. Thus, maintenance work can be facilitated.
  • Embodiments 1 and 2 Although an apparatus for braking the rotation of the driving sheave 4a which is a sheave is shown in Embodiments 1 and 2, it is possible to utilize an emergency brake apparatus for the deflector wheel 5 as long as the frictional force between the deflector wheel 5 which is also a sheave and the main rope 6 is sufficiently high, and the ascent of the car 7 can be stopped by braking the deflector wheel 5.
  • the solenoid coil 14 is shown as the holding means, a holding mechanism for mechanically holding and release the roller 12 at the release position may also be use, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Braking Arrangements (AREA)
EP00985996A 2000-12-28 2000-12-28 Notbremseinrichtung für aufzug Withdrawn EP1352869A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/009424 WO2002053485A1 (fr) 2000-12-28 2000-12-28 Dispositif de frein d'urgence pour ascenseur

Publications (2)

Publication Number Publication Date
EP1352869A1 true EP1352869A1 (de) 2003-10-15
EP1352869A4 EP1352869A4 (de) 2009-12-30

Family

ID=11736869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00985996A Withdrawn EP1352869A4 (de) 2000-12-28 2000-12-28 Notbremseinrichtung für aufzug

Country Status (3)

Country Link
EP (1) EP1352869A4 (de)
JP (1) JPWO2002053485A1 (de)
WO (1) WO2002053485A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100844633B1 (ko) * 2006-09-06 2008-07-07 미쓰비시덴키 가부시키가이샤 엘리베이터의 비상 브레이크 장치
US7607518B2 (en) 2004-10-05 2009-10-27 Mitsubishi Electric Corporation Emergency brake of elevator

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100447068C (zh) * 2004-02-23 2008-12-31 三菱电机株式会社 电梯的紧急制动装置
CN100408460C (zh) * 2004-07-22 2008-08-06 上海三菱电梯有限公司 电梯上行超速保护装置
WO2008146383A1 (ja) * 2007-05-31 2008-12-04 Mitsubishi Electric Corporation エレベータ用巻上機のブレーキ装置
JP5084838B2 (ja) * 2007-09-27 2012-11-28 三菱電機株式会社 エレベータ巻上機
JP5377236B2 (ja) * 2009-11-10 2013-12-25 株式会社東芝 寝台装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1401014A (fr) * 1964-07-16 1965-05-28 Inventio Ag Limiteur de vitesse pour élévateurs
DE2802681A1 (de) * 1978-01-21 1979-07-26 Thyssen Aufzuege Gmbh Geschwindigkeitsbegrenzer
GB2151810A (en) * 1983-12-16 1985-07-24 Elevator Gmbh Lift speed limiter
US5007505A (en) * 1990-03-19 1991-04-16 Northern Elevator Limited Elevator traction sheave brake
EP0529323A1 (de) * 1991-08-28 1993-03-03 Inventio Ag Notbremseinrichtung für einen Aufzug
EP0748758A1 (de) * 1995-06-13 1996-12-18 Otis Elevator Company Bidirektionaler Geschwindigkeitsbegrenzer für Aufzüge

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333549A (en) * 1980-06-25 1982-06-08 Otis Elevator Company Car blocking apparatus
JPS59159675U (ja) * 1983-04-11 1984-10-26 三菱電機株式会社 エレベ−タ用非常止め装置
US4977982A (en) * 1989-12-26 1990-12-18 Otis Elevator Company Elevator sheave brake safety
JP2763244B2 (ja) * 1993-01-07 1998-06-11 三菱電機株式会社 エレベーター用制動装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1401014A (fr) * 1964-07-16 1965-05-28 Inventio Ag Limiteur de vitesse pour élévateurs
DE2802681A1 (de) * 1978-01-21 1979-07-26 Thyssen Aufzuege Gmbh Geschwindigkeitsbegrenzer
GB2151810A (en) * 1983-12-16 1985-07-24 Elevator Gmbh Lift speed limiter
US5007505A (en) * 1990-03-19 1991-04-16 Northern Elevator Limited Elevator traction sheave brake
EP0529323A1 (de) * 1991-08-28 1993-03-03 Inventio Ag Notbremseinrichtung für einen Aufzug
EP0748758A1 (de) * 1995-06-13 1996-12-18 Otis Elevator Company Bidirektionaler Geschwindigkeitsbegrenzer für Aufzüge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO02053485A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7607518B2 (en) 2004-10-05 2009-10-27 Mitsubishi Electric Corporation Emergency brake of elevator
US8006806B2 (en) 2004-10-05 2011-08-30 Mitsubishi Electric Corporation Emergency brake of elevator
KR100844633B1 (ko) * 2006-09-06 2008-07-07 미쓰비시덴키 가부시키가이샤 엘리베이터의 비상 브레이크 장치

Also Published As

Publication number Publication date
WO2002053485A1 (fr) 2002-07-11
EP1352869A4 (de) 2009-12-30
JPWO2002053485A1 (ja) 2004-04-30

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