EP1588974A1 - Aufzugsvorrichtung - Google Patents

Aufzugsvorrichtung Download PDF

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Publication number
EP1588974A1
EP1588974A1 EP03701898A EP03701898A EP1588974A1 EP 1588974 A1 EP1588974 A1 EP 1588974A1 EP 03701898 A EP03701898 A EP 03701898A EP 03701898 A EP03701898 A EP 03701898A EP 1588974 A1 EP1588974 A1 EP 1588974A1
Authority
EP
European Patent Office
Prior art keywords
brake
releasing
braking device
lever
counterweight
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Withdrawn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
EP03701898A
Other languages
English (en)
French (fr)
Other versions
EP1588974A4 (de
Inventor
Toshiaki c/o Mitsubishi Denki K. K. ISHII
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 EP1588974A1 publication Critical patent/EP1588974A1/de
Publication of EP1588974A4 publication Critical patent/EP1588974A4/de
Withdrawn legal-status Critical Current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
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • 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
    • B66B5/027—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/0035—Arrangement of driving gear, e.g. location or support
    • B66B11/0045—Arrangement of driving gear, e.g. location or support in the hoistway
    • B66B11/0055—Arrangement of driving gear, e.g. location or support in the hoistway on the counterweight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B17/00—Hoistway equipment
    • B66B17/12—Counterpoises

Definitions

  • the present invention relates to an elevator system wherein a hoisting machine is mounted on an elevator car or a counterweight.
  • this braking device has the method of pulling the rope which is coupled with the lever only downward, in the case where, for example, the braking device is provided on the elevator car side, when the elevator car is heavier than the counterweight depending on the situation of the number of persons in the car, the elevator car, of which the grip of the guiderails is released, starts descending once the lever is actuated. That is, because the elevator car moves in the direction which force is exerted by the lever, release of brake of the braking device by the lever cannot always be performed accurately. In other words, there are case where release of brake cannot be performed properly depending on the increase and decrease in the number of persons riding in the car.
  • the present invention has as its intension to enable rescue of passengers by making it possible for a maintenance worker to mechanically release brake of the braking device from the ground floor in the event that electrical control of opening and closing of the braking device becomes impossible when the elevator stops between floors due to malfunction, and afterwards to move the elevator car to a nearest floor, in an elevator system having a hoisting machine and a braking device mounted on the elevator car or the counterweight.
  • the present invention also has as its intension to enable more stable release of brake of the braking device, regardless of the number of persons riding in the elevator car.
  • the elevator system in the present invention comprises an elevator car which ascends and descends through the hoistway and a counterweight which travels in the direction opposite to the elevator car; and a hoisting machine is mounted on either the elevator car or the counterweight.
  • a main rope which suspends the elevator car and the counterweight is passed around a drive sheave of the hoisting machine.
  • a braking device which applies brake to the hoisting machine by means of brake springs and also releases brake of the hoisting machine by means of an excited electromagnet by resisting the brake springs is provided on the hoisting machine.
  • a brake-releasing mechanism for releasing brake of the braking device mechanically by resisting the brake springs is provided on the hoisting machine, separately from the braking device.
  • the brake-releasing mechanism has brake-releasing levers for releasing brake of the braking device by retracting the brake springs, and operation ropes for operating the brake-releasing levers wound around a pair of pulleys which are provided in a part higher and lower than either of the travel area of the elevator car or the counterweight and stretched between the pulleys ; and the brake-releasing levers and the operation ropes are connected via a connecting means.
  • the brake-releasing mechanism is comprised of the below-mentioned two sets of brake-releasing mechanisms (a first and a second). That is, the brake-releasing mechanism is comprised of a first brake-releasing mechanism having a first pair of pulleys, a first operation rope and a first brake-releasing lever, wherein the operation rope is pulled up so as to release brake of the braking device; and a second brake-releasing mechanism having a second pair of pulleys, a second operation rope and a second brake-releasing lever, wherein the operation rope is pulled down so as to release brake of the braking device.
  • the elevator system comprises two - a first and second - sets of brake-releasing mechanisms, it is possible to select the brake-releasing mechanism suited to the situation of the riding of the car and to perform a more stable releasing operation of the braking device with facility and also without fail, regardless of the number of persons riding in the elevator car.
  • Figure 1 is a diagram showing an example of an arrangement of the elevator system in accordance with the first embodiment of the present invention
  • Figure 1(A) is an elevation of the elevator system viewed from the horizontal direction
  • Figure 1(B) is a plan view of the elevator system viewed from above.
  • Entrance doors 4a are provided on the front surface of the car 4, and hall doors 5 are provided on the hall side, facing the entrance doors 4a.
  • the counterweight 10 is arranged between the rear surface of the car 4 and the wall of the hoistway 1.
  • the hoisting machine 11 is mounted on the counterweight 10.
  • a braking device 20 which performs opening and closing of brake of the hoisting machine 11 is provided.
  • both ends of the main rope 6 which suspends the elevator car 4 and the counterweight 10 are fixed to an upper part of the hoistway 1, and one of the ends of the main rope 6 is successively wound around a pair of suspension sheaves 7 provided in a lower part of the elevator car 4 starting at the upper part of the hoistway 1, and reaches the direction-changing pulley 8 which is provided in an upper part of the hoistway 1.
  • the brake-releasing mechanism used in the first embodiment comprises two sets - a first and a second - of brake-releasing mechanisms .
  • the first brake-releasing mechanism 30 has a first brake-releasing lever 31 for mechanically releasing brake of the braking device 20, a pair of first pulleys 32 which are separately provided in a part higher and lower than the travel area of the counterweight 10, and a first operation rope 33 which is passed around the first pulleys 32 and stretched in a loop shape between the first pulleys 32.
  • the second brake-releasing mechanism 40 has a second brake-releasing lever 41, second pulleys 42, and a second operation rope 43.
  • Figure 2 is a diagram for explaining the structures of the braking device of the hoisting machine and the brake-releasingmechanismmounted on the counterweight in accordance with the first embodiment of the present invention
  • Figure 2(A) is an elevation of the braking device of the hoisting machine viewed from the horizontal direction
  • Figure 2(B) is a cross sectional view taken on line C-C of the braking device.
  • the external form of the counterweight 10, on which the hoisting machine 11 is mounted is comprised of a frame body 14, and a weight 15 for the counterweight is mounted in a lower part inside the frame body 14.
  • the hoisting machine 11 comprises a drive sheave 12 around which the main rope 6 is passed, and an electric motor 13 for rotatably driving the drive sheave 12.
  • the braking device 20 is structured as a part of the hoisting machine 11; and a brake drum 21 is arranged on the same rotation axis as the drive sheave 12 of the hoisting machine 11.
  • a pair of brake shoes 22 is provided facing the circumferential surface of the brake drum 21; and each of the brake shoes 22 is fixed to the brake arms 23.
  • the brake arms 23 receive the force of the braking springs 24 provided between themselves and a side part of the frame body 14 of the counterweight 10, and stops rotation of the brake drum 21 by pressing the brake shoes 22 to the brake drum 21.
  • One of the ends of the brake arms 23 are fixed to the frame body 14 of the counterweight 10 via brake arm pins 23a, and the brake arms 23 pivot with the brake arm pins 23a as their centers.
  • a plunger 28 is used as a pushing body which is driven by the excited electromagnet.
  • a plunger head 28a which is an end part of the plunger 28, abuts on the brake levers 26.
  • the first brake-releasing lever 31 is formed in a longitudinal shape, and on one end thereof there is provided a pierced first releasing-lever hole 35.
  • the plunger 28 is inserted into this first releasing-lever hole 35.
  • the plunger head 28a is formed to have a larger diameter than the part of the plunger 28 that is inserted into the first brake-releasing lever 31. For this reason, it is possible to couple the plunger head 28a with one end of the first brake-releasing lever 31.
  • this coupling part of the first brake-releasing lever 31 will be referred to as the first releasing-lever coupling part 34.
  • the first brake-releasing lever 31 uses as a supporting-point base 29 a part of the casing 27 which is close to the first brake-releasing lever coupling part 34 and in which the electromagnet is housed; and the supporting point of the first brake-releasing lever 31 is supported by the supporting-point base 29.
  • the other end of the first brake-releasing lever 31 is connected to the first operation rope 33 by means of a connection means.
  • a connection means In the first embodiment, an example in which the first brake-releasing lever 31 is constantly fixed to the first operation rope 33 is shown.
  • the brake-releasing lever 41 is formed in a longitudinal shape, with the middle part formed in a square-loop shape which surrounds the plunger head 28a.
  • one end of the second brake-releasing lever 41 uses as a supporting point the supporting-point base 29 of the casing 27 of the electromagnet, and normally one end is in a state in which it abuts on the supporting-point base 29.
  • the middle part of the second brake-releasing lever 41 has a second releasing-lever coupling part 44 between itself and the plunger head 28a, and is pivotally connected to the plunger head 28a via the second releasing-lever pin 45.
  • the other end of the second brake-releasing lever 41 is connected to the second operation rope 43 by means of a connection means.
  • a connection means similarly to the first brake-releasing lever 31, an example in which the second brake-releasing lever 41 is constantly fixed to the second operation rope 43 is shown.
  • releasing-lever holes 16 for inserting the first brake-releasing lever 31 and the second brake-releasing lever 41 respectively. It is structured so that during normal ascent and descent of the elevator car 4, the first brake-releasing lever 31 and the second brake-releasing lever 41 are both fixed to the side parts of the frame body of the counterweight 10 by fixing cords 17, and, in the case where the levers 31 and 41 are to be actuated in an emergency, the fixing cords 17 are broken by appliance of predetermined forces to the levers 31 and 41 and the fixation to the counterweight 10 is released.
  • Figure 3 is an elevation for explaining the motion of opening and closing of the braking device in accordance with the first embodiment of the present invention.
  • the brake arm 23 pivots against the force of the brake springs 23 with the brake arm pins 23a as their centers, and releases brake of the braking device 20 by separating the brake shoes 22 from the brake drum 21.
  • the first brake-releasing lever 31 and the second brake-releasing lever 41 travel synchronously with the travel of the counterweight 10. For this reason, the operation ropes 33 and 43 and the pulleys 32 and 42 which are constantly fixed to the levers 31 and 41 move synchronously with the travel of the levers 31 and 41.
  • Figure 4 is an elevation for explaining the motion of the first brake-releasing mechanism in accordance with the first embodiment of the present invention.
  • the first brake-releasing mechanism 30 releases the braking device 20 by actuating the first brake-releasing lever 31 by pulling down the part of the rope which is at the side opposite to the part of the first operation rope 33 where the first brake-releasing lever 31 is fixed.
  • the pulley 32 rotates in the direction shown by the arrow in Figure 4, and the connection part of the first brake-releasing lever 31 and the first operation rope 33 is pulled up.
  • the first brake-releasing lever 31 pivots with the supporting point supported by the supporting-point base 29 of the casing 27 of the electromagnet as the center, and the first releasing-lever coupling part 34 presses the plunger head 28a downward.
  • the subsequent motion is the same as the brake releasing motion of the braking device 20; the force of the plunger 28 is transmitted to the brake arms 23 via the brake levers 26, and releasing of brake of the braking device 20 is performed by resisting the brake springs 24.
  • the fixing cord 17 which fixes the first brake-releasing lever 31 to the counterweight 10 is broken, and operation of the first brake-releasing lever 31 becomes possible by pulling the first operation rope 33.
  • Figure 5 is an elevation for explaining the motion of the second brake-releasing mechanism in accordance with the first embodiment of the present invention.
  • the second brake-releasing lever 41 pivots with the end part of the second brake-releasing lever 41 which abuts on the supporting-point base 29 of the casing 27 of the electromagnet as the supporting point, and the second brake-releasing lever coupling part 44 presses the plunger head 28a downward.
  • the subsequent motion is the same as the normal brake releasing motion of the braking device 20 and the first brake-releasing mechanism 30; the force of the plunger 28 is transmitted to the brake arms 23 via the brake levers 26, and releasing of brake is performed by resisting the brake springs 24.
  • the fixing cord 17, which fixes the second brake-releasing lever 41 to the counterweight 10 is broken, and operation of the second brake-releasing lever 41 becomes possible by pulling the second operation rope 43.
  • the first brake-releasing mechanism 30 is selected; and releasing of brake of the braking device 20 is performed by usage of the first brake-releasing lever 31.
  • releasing of brake of the braking device 20 is performed by usage of the second brake-releasing lever 41.
  • the first brake-releasing lever 31 is used in cases where the counterweight 10 is heavier than the elevator car 4, i.e. in cases where the counterweight 10 moves downward when the braking device 20 is released.
  • the first brake-releasing lever 31 is actuated, an upward force resisting the force of the lever 31 pressing the plunger head 28a is exerted to the supporting-point base 29, which supports the supporting point of the lever 31. For this reason, in cases where the counterweight 10 is lighter than the elevator car 4, i.e.
  • the cases where the second brake-releasing lever 41 is to be used are cases where the counterweight 10 is lighter than the elevator car 4, i.e. cases where the counterweight 10 moves upward when the braking device 20 is released, as aforementioned.
  • the lever 41 acts with the end part of the brake lever 41 abutting on the supporting-point base 29 as the supporting point so as to press the plunger head 28a that is coupled with a middle part of the lever 41, however, at this time, if the counterweight 10 moves downward, the force of the lever 41 to press the plunger head 28a escapes, and cases where releasing of brake of the braking device 20 cannot be performed accurately occur.
  • the first pulley 32 and the second pulley 42 used in the brake-releasing mechanism of the braking device 20 of the hoisting machine 10 in accordance with the first embodiment of the present invention are of iron; however, these can also be of synthetic resin, which is lighter in weight.
  • the first operation rope 33 and the second operation rope 43 can be of synthetic fiber, which is lighter in weight compared to those of iron. If the moments of inertia of the pulleys and the operation ropes are large, the forces exerted by the operation ropes on the brake-releasing levers, which move synchronously with the counterweight 10 also become large during normal acceleration and deceleration of the elevator, thus causing disturbance upon the brake-releasing mechanism. For this reason, it is possible to lessen the possibility of faulty operation of the brake-releasing mechanism by using synthetic-resin pulleys and synthetic-fiber operation ropes, and making them lighter in weight compared to those of iron.
  • the braking device 20 which is mounted on the counterweight 10 with the hoisting machine 11, has brake-releasing mechanisms that comprise a brake-releasing lever, an operation rope and a pair of pulleys, in the event that electrical control to release brake of the braking device 20 becomes impossible in an emergency, it is possible to mechanically release brake of the braking device 20 from the ground, and there is no necessity for a maintenance worker to go to the place where the hoisting machine 11 mounted on the counterweight has stopped to release brake of the braking device 20; thus it is possible to rescue passengers by moving the elevator car 4 to the nearest floor with facility and without fail.
  • brake-releasing mechanisms that comprise a brake-releasing lever, an operation rope and a pair of pulleys
  • the brake-releasing mechanism is comprised of two sets - a first and a second - brake-releasing mechanisms, in both the cases where the counterweight 10 is heavier than the elevator car 4 and where it is lighter than the elevator car 4, it is possible to select and use the brake-releasing mechanism suitable for the case, and it is possible to release brake of the brake-releasing device 20 stably without being affected by the imbalance between the weights of the counterweight 10 and the elevator car 4.
  • first brake-releasing lever 31 and the second brake-releasing lever 41 both use a part of the casing 27 of the electromagnet as a supporting-point base 29 and make it work as a supporting point; the supporting-point base 29 is close to the plunger head 28a that is the working point, and is preferable in position as a supporting point.
  • the casing 27 of the electromagnet and the frame body 14 of the counterweight 10 are strongly-structured by nature and also high in strength, so it is suitable for a supporting point.
  • Figure 6 is an elevation for explaining the structure of the brake-releasing mechanism of the braking device in accordance with the second embodiment of the present invention.
  • actuating pieces 18 are fixed on both the first operation rope 33 and the second operation rope 43.
  • the actuating piece 18 fixed on the side of the first operation rope 33 is arranged near the first pulley 32 provided in a lower part of the hoistway 1
  • the actuating piece 18 fixed on the side of the second operation rope 43 is arranged near the second pulley 42 provided in an upper part of the hoistway 1.
  • the levers and the actuating pieces 18 become coupled by operating and moving each of the operation ropes in the direction the levers are to be moved respectively, thus enabling operation of the levers.
  • the other structures and the motions are the same as the first embodiment, so the same numerals are given to the same parts or the corresponding parts, thus repeated explanation will be omitted.
  • actuating pieces 18 are needed because the brake-releasing levers and the operation ropes are not constantly fixed, however, as the brake-releasing levers and the operation ropes are not in contact with each other during normal ascent and descent of the elevator car 4, it is advantageous in the point that there is no impact caused by moments of inertia from the pulleys nor from the operation ropes. In addition to this, the same effects as the first embodiment can be attained.
  • the elevator system in accordance with the present invention enables rescue of passengers by the maintenance worker's releasing brake of the braking device from the ground mechanically and moving the elevator car to the nearest floor, in the event that electric control of opening and closing of the braking device becomes impossible when the elevator stops between floors due to malfunction.
  • the present invention is useful as an elevator wherein security is improved in emergencies and space-saving is aimed by mounting the hoisting machine on the elevator car or the counterweight.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP03701898A 2003-01-28 2003-01-28 Aufzugsvorrichtung Withdrawn EP1588974A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/000775 WO2004067428A1 (ja) 2003-01-28 2003-01-28 エレベータ装置

Publications (2)

Publication Number Publication Date
EP1588974A1 true EP1588974A1 (de) 2005-10-26
EP1588974A4 EP1588974A4 (de) 2011-06-01

Family

ID=32800800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03701898A Withdrawn EP1588974A4 (de) 2003-01-28 2003-01-28 Aufzugsvorrichtung

Country Status (5)

Country Link
EP (1) EP1588974A4 (de)
JP (1) JPWO2004067428A1 (de)
KR (1) KR100627539B1 (de)
CN (1) CN100357168C (de)
WO (1) WO2004067428A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2486126C2 (ru) * 2011-08-05 2013-06-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный университет" Рудничная скиповая подъемная установка
US11492232B2 (en) 2018-08-20 2022-11-08 Otis Elevator Company Elevator balance weight rescue device, an elevator and an elevator balance weight rescue method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016109158A1 (en) 2014-12-31 2016-07-07 Otis Elevator Company Elevator system roping arrangement
CN109238678B (zh) * 2018-09-29 2020-09-11 沈阳聚德视频技术有限公司 一种电梯制动弹簧同步检测智能视觉系统的实现方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6021872A (en) * 1997-05-28 2000-02-08 Otis Elevator Company Remote brake release mechanism for an elevator machine
US6068087A (en) * 1998-09-30 2000-05-30 Otis Elevator Company Belt-climbing elevator having drive in counterweight and common drive and suspension rope
WO2000035800A1 (fr) * 1998-12-11 2000-06-22 Kabushiki Kaisha Toshiba Ascenseur
US6179090B1 (en) * 1996-11-21 2001-01-30 Alan V. Casas Elevator hoist brake release apparatus
US6374953B1 (en) * 1999-11-30 2002-04-23 Alan V. Casas Vertical plunger brake control device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3098673B2 (ja) * 1994-05-23 2000-10-16 三菱電機ビルテクノサービス株式会社 エレベータのブレーキ解放装置
US5713433A (en) * 1995-09-21 1998-02-03 Wang Chiou N Auxiliary escape of elevator
JP3225811B2 (ja) * 1995-11-06 2001-11-05 三菱電機株式会社 エレベータ装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6179090B1 (en) * 1996-11-21 2001-01-30 Alan V. Casas Elevator hoist brake release apparatus
US6021872A (en) * 1997-05-28 2000-02-08 Otis Elevator Company Remote brake release mechanism for an elevator machine
US6068087A (en) * 1998-09-30 2000-05-30 Otis Elevator Company Belt-climbing elevator having drive in counterweight and common drive and suspension rope
WO2000035800A1 (fr) * 1998-12-11 2000-06-22 Kabushiki Kaisha Toshiba Ascenseur
US6374953B1 (en) * 1999-11-30 2002-04-23 Alan V. Casas Vertical plunger brake control device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2004067428A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2486126C2 (ru) * 2011-08-05 2013-06-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный университет" Рудничная скиповая подъемная установка
US11492232B2 (en) 2018-08-20 2022-11-08 Otis Elevator Company Elevator balance weight rescue device, an elevator and an elevator balance weight rescue method

Also Published As

Publication number Publication date
CN1620399A (zh) 2005-05-25
KR20050002894A (ko) 2005-01-10
WO2004067428A1 (ja) 2004-08-12
EP1588974A4 (de) 2011-06-01
JPWO2004067428A1 (ja) 2006-05-18
CN100357168C (zh) 2007-12-26
KR100627539B1 (ko) 2006-09-21

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