EP1409389A1 - Elevator rope braking system - Google Patents
Elevator rope braking systemInfo
- Publication number
- EP1409389A1 EP1409389A1 EP01982879A EP01982879A EP1409389A1 EP 1409389 A1 EP1409389 A1 EP 1409389A1 EP 01982879 A EP01982879 A EP 01982879A EP 01982879 A EP01982879 A EP 01982879A EP 1409389 A1 EP1409389 A1 EP 1409389A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elevator
- rope
- braking system
- plate
- fixed plate
- 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- Withdrawn
Links
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
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/185—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by acting on main ropes or main cables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
-
- 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
- B66D5/16—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes for action on ropes or cables
Definitions
- the present invention relates to an elevator rope braking system, in which an elevator hauling rope is temporarily supported and locked by the operating plate equipped with a brake lining and which operates by a hydraulic pressure, when the elevator slowly moves due to slippage of the rope or operates at a speed higher than the normal speed, so as to thereby prevent the elevator from slippage or over-speed and achieve a safe operation of the elevator.
- elevators are connected to a rope which is hauled up/down by the driving force of a motor, so as to lower or elevate passengers or loads throughout a building.
- Such an elevating or lowering operation of the elevator is carried out by a guide shoe which is guided by the guide rail at both sides of the elevator.
- Elevators are equipped with safety devices such as a braking device or lifting motor so as to achieve an in-advance prevention against slippage or over-speed of elevator which is caused due to the deterioration of frictional force between the hauling rope and lifting pulley or weight difference between an elevator car and balancing weight.
- safety devices such as a braking device or lifting motor so as to achieve an in-advance prevention against slippage or over-speed of elevator which is caused due to the deterioration of frictional force between the hauling rope and lifting pulley or weight difference between an elevator car and balancing weight.
- Conventional emergency braking devices adopt a system in which an abnormal operation of the elevator is controlled by limiting the guide rail for guiding the elevator through a wedging jaw.
- Such an emergency braking device is constructed in that a governor switch cuts off power being supplied to the motor upon detection of over-speed of elevator, and the wedging emergency braking device for limiting the governor rope limits operation of the guide rail, to thereby stop the operation of elevator.
- the conventional braking device has drawbacks in that the braking device operates only when the elevator is rapidly hauled down at a speed higher than the normal predetermined speed, and an effective brake mechanism may not be obtained when the elevator slowly slips from the position of operational stoppage or when the elevator is rapidly hauled up at a speed higher than the normal predetermined speed.
- an emergency braking system is proposed in that emergency braking operation for elevator is performed in such a manner that a cylinder rod is maintained at locked state by a solenoid, the locked state of the cylinder rod is released by the solenoid upon detection of the signal indicative of an abnormal operation of the elevator, and the released cylinder rod pulls a brake shoe by the repulsive force of the spring so as to allow the brake shoe to surface- contact the rope.
- an emergency braking system is economically disadvantageous since the manufacturing cost is high and volume of the braking system increases in order to maintain braking pressure of approximately 1000kg or higher.
- Korean Patent Laid-open No. 1999-52147 discloses an elevator rope braking device which includes, as shown in Fig. 1, a hydraulic pressure generating unit for receiving signals from a control unit of an elevator and supplying braking force; a repulsive force generating unit consisting of a hydraulic cylinder 125 mounted to a support plate 123 and a connection member 127 having at an outer periphery thereof a spring; a fixed plate 133 having both ends fixed to a housing, and which contacts the connection member 127; and an operating plate 135 installed at an end of the connection member 127 in such a manner that the operating plate 135 advances to or retreats from the fixed plate against the elastic force from the spring.
- the elevator rope braking device shown in Fig. 1 locks or releases an elevator rope 103 in accordance with the operation of the repulsive force generating unit.
- Laid-open No. 1999-52147 is constructed to brake the elevator rope through the movement of the operating plate 135, which causes brake load to be concentrated to the fixed plate 133.
- the fixed plate 133 may not sufficiently support such a concentrated overload.
- the present invention provides a new and improved elevator rope braking system which overcomes the drawbacks enumerated above with respect to the previously patented devices.
- an elevator rope braking system including a hydraulic pressure generating unit having a directional solenoid valve and a pressure accumulator which operate in accordance with a signal output from a controller of an elevator; a driving unit having a hydraulic cylinder which receives a driving force from the hydraulic pressure generating unit, an elastic spring and a connection member; and a locking unit having a fixed plate both ends of which are fixed to a housing, and an operating plate which advances or retreats against elastic force of a plurality of springs.
- the elevator rope braking system of the prevent invention is constructed to brake the rope side where an elevator is installed or the rope side where a balancing weight is installed, from among the ropes caught at a lifting pulley disposed in the machinery room having - a winch installed therein.
- FIG. 1 is a perspective view illustrating a conventional elevator rope braking system
- FIGs. 2a and 2b are schematic views illustrating an installed state of an elevator ' rope braking system according to the present invention
- Fig. 3 is a perspective view illustrating an elevator rope braking system according to the present invention.
- Figs. 4a and 4b are plane views illustrating operation of the elevator rope braking system according to the present invention, wherein Fig. 4a illustrates a state where the rope locking is released and Fig. 4b illustrates a state where the rope is locked;
- Figs. 5a and 5b are perspective views illustrating linings attached, respectively, to a fixed plate and an operating plate of the elevator rope braking system according to the prevent invention.
- Fig. 6 illustrates a hydraulic circuit for operating the operating plate in the elevator rope braking system according to the present invention.
- an elevator rope braking system(A) includes a hydraulic pressure generating unit having a directional solenoid valve and a pressure accumulator which operate in accordance with a signal output from a controller of an elevator; a driving unit 21 having a hydraulic cylinder 25 which receives a driving force from the hydraulic pressure generating unit, an elastic spring 29 and a connection member 27; and a locking unit 31 having a fixed plate 33 both ends of which are fixed to a housing 11, and an operating plate 35 which advances or retreats against elastic force of a plurality of springs.
- the elevator rope braking system of the prevent invention is constructed to brake the rope side where an elevator is installed or the rope side where a balancing weight is installed, from among the ropes caught at a lifting pulley disposed in the machinery room having a winch installed therein.
- the housing 11 is constituted by two sections which are spaced apart from each other in a symmetric manner and have protruded portions 1 1a which have both ends bent inwardly and rectangularly.
- the driving unit 21 includes the hydraulic cylinder 25 which is provided with a hydraulic pressure through a hydraulic pipe 25b from a hydraulic pressure generating unit 41 penetrating through a support plate 23 fixed inside of the protruded portion of the housing, and the elastic spring 29.
- the fixed plate 33 and the operating plate 35 contacting a plunger 25a of the hydraulic cylinder 25 have linings 33a and 35a with locking grooves 33b and 35b formed along the surfaces of the fixed plate 33 and the operating plate 35 facing each other, respectively, in such a manner as to tightly support an elevator rope 3.
- connection members 27 which penetrate through the fixed plate 33, the operating plate 34 and the support plate 23 in sequence.
- the connection member 27 disposed between the fixed plate 33 and the operating plate 35 is equipped with the elastic spring 29.
- the hydraulic pressure generating unit 41 of the elevator rope braking system(A) of the present invention includes a pump 42 for compressing the working fluid contained in a tank 43; an accumulator 44 for storing the working fluid which is pressed at a predetermined pressure by the pump and supplied through a check valve 46; a directional solenoid valve 45 which opens/shuts off in accordance with the elevator operation or stoppage signal so as to change the flow direction of the working fluid; a relief valve 47 for controlling operation of the pump 42; and a pressure switch 48 and a pressure gauge 49.
- a pump 42 for compressing the working fluid contained in a tank 43
- an accumulator 44 for storing the working fluid which is pressed at a predetermined pressure by the pump and supplied through a check valve 46
- a directional solenoid valve 45 which opens/shuts off in accordance with the elevator operation or stoppage signal so as to change the flow direction of the working fluid
- a relief valve 47 for controlling operation of the pump 42
- the driving unit 21 for receiving the working fluid through the hydraulic pipe 25b from the hydraulic pressure generating unit 41 includes the hydraulic cylinder 25 connected to an end of the hydraulic pipe 25b; the support plate 23 through which the hydraulic cylinder 25 penetrates; and the connection member 27 having along the outer periphery thereof the elastic spring 29, and which penetrates through and supports the fixed plate 33, the protruded portion 11a of the housing, the operating plate 35 and the support plate 23.
- the locking unit 31 includes the fixed plate 33 which is fixed outside of one protruded portion 1 1a of the housing through the connection member 27; and the operating plate 35 which is fixed by the connection member 27 between two protruded portions 11a of the housing, and has one surface contacting the front end of the plunger 25a of the hydraulic cylinder 25.
- the operating plate 35 is pushed by the plunger 25a through the operation of the hydraulic cylinder 25 and pressed toward the fixed plate 33 against the elastic force of the elastic spring 29 arranged along the outer periphery of the connection member 27 between the fixed plate 33 and the operating plate 35.
- the fixed plate 33 which is fixed outside of one protruded portion 1 1a of the housing through the connection member 27
- the operating plate 35 which is fixed by the connection member 27 between two protruded portions 11a of the housing, and has one surface contacting the front end of the plunger 25a of the hydraulic cylinder 25.
- the operating plate 35 is pushed by the plunger 25a through the operation of the hydraulic cylinder 25 and pressed toward the fixed plate
- the fixed plate 33 is equipped with, at the front surface thereof, the lining 33a which has a plurality of locking grooves 33b contacting the elevator rope 3.
- the operating plate 35 is equipped with the lining 35a which has a plurality of locking grooves 35b.
- connection member 27 having along the outer periphery thereof the elastic spring 29 can be increased or decreased. That is, number of connection members 27 for supporting the support plate 23 and the fixed plate 33 installed to the both sides from the operating plate 35 is not specifically limited.
- Plural ropes 3 arranged between the operating plate 35 and the fixed plate 33 can be maintained at the locked state by linings 33a and 35a. That is, ropes 3 are tightly supported by locking grooves 33b and 35b formed at linings 33a and 35a, respectively, and maintained at the stopped state.
- Reference numeral 13 of Figs. 4a and 4b denotes a device for attaching and installing the housing 11 of the elevator rope braking system(A).
- the control unit of the elevator transmits a signal to the hydraulic pressure generating unit 41.
- the plunger 25a of the hydraulic cylinder 25 is pressed by the operation of the hydraulic pressure generating unit 41, and pushes the operating plate 35.
- the operating plate 35 moves toward the fixed plate 33, allowing the rope 3 to be re-locked so as to stop the operation of the elevator 1 in a safe manner.
- the operating plate 35 of the locking unit 31 has at the surface thereof opposite to the surface contacting the plunger 25a of the hydraulic cylinder 25, the lining 35a having a plurality of locking grooves 35b contacting the elevator rope 3.
- the fixed plate 33 of the locking unit 31 has at the front surface thereof the lining 33a having a plurality of locking grooves 33b with trapezoidal cross section and which is attached to the fixed plate 33 in a lengthwise direction.
- the hydraulic pressure generating unit 41 for operating the driving unit 21 operates as follows. Referring to Fig. 6, when the elevator 1 in operation stops, a need arises to operate the hydraulic cylinder 25 and push, by temporary and large power, the plunger 25a arranged at the front end of the hydraulic cylinder 25 so as to tightly support the elevator rope 3.
- the working fluid is pressed by the operation of the pump 42, delivered to the accumulator 44 through the check valve 46, and standing by in the accumulator, by being maintained at a predetermined pressure which is set by the pressure switch 48.
- the working fluid standing by at a predetermined pressure passes through the directional solenoid valve 45 with the opening of the directional solenoid valve 45 which shuts off the working fluid flow toward the hydraulic cylinder 25, and enters the hydraulic cylinder 25.
- the working fluid is delivered from the accumulator 44 to the hydraulic cylinder 25 so as to permit the plunger 25a of the hydraulic cylinder 25 to push the operating plate 33.
- the return line for the directional solenoid valve 45 is open when a power is applied to the directional solenoid valve 45 by an elevator operation re-start signal.
- the operating plate 35 pushed toward the fixed plate 33 is returned by the elastic force of the elastic spring 29, and pushed toward the support plate 23, to thereby press the plunger 25a to retract into the hydraulic cylinder 25.
- the working fluid returns to the tank 43 through the return line of the directional solenoid valve 45.
- the elevator rope braking system is capable of performing brake operation even during power failure, since the accumulator 44 maintains hydraulic pressure of a predetermined level.
- the working fluid is delivered to the hydraulic cylinder 25 when the directional solenoid valve 45 opens in the hydraulic cylinder direction due to the power failure, at the state where the accumulator 44 maintains a predetermined level of hydraulic pressure.
- the plunger 25a is pushed and presses the operating plate, to thereby brake the elevator rope 3.
- an elevator rope braking system of the present invention is advantageous in that structures of the housing and the fixed plate are improved so as to sufficiently correspond to the temporary large load occurred during braking operation for the abnormal motion of the elevator rope, to thereby increase reliability of the system.
- an elevator rope braking system of the present invention is advantageous in that the operating plate is directly pressed by the plunger of the hydraulic cylinder, to thereby brake abnormal motion of the elevator rope and elevator in a rapid manner.
- an elevator rope braking system of the present invention employs an accumulator so as to carry out elevator brake operation even during power failure.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2000029397U | 2000-10-21 | ||
KR2020000029397U KR200221450Y1 (en) | 2000-10-21 | 2000-10-21 | Brake system for rope of a elevator |
PCT/KR2001/001775 WO2002032801A1 (en) | 2000-10-21 | 2001-10-20 | Elevator rope braking system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1409389A1 true EP1409389A1 (en) | 2004-04-21 |
EP1409389A4 EP1409389A4 (en) | 2005-06-29 |
Family
ID=19670842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01982879A Withdrawn EP1409389A4 (en) | 2000-10-21 | 2001-10-20 | Elevator rope braking system |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1409389A4 (en) |
KR (1) | KR200221450Y1 (en) |
CN (1) | CN1469835A (en) |
AU (1) | AU2002214338A1 (en) |
WO (1) | WO2002032801A1 (en) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004211888A (en) * | 2002-12-24 | 2004-07-29 | Inventio Ag | Brake-shoe for braking cable |
EP1598299B1 (en) * | 2003-02-27 | 2015-12-02 | Mitsubishi Denki Kabushiki Kaisha | Elevator equipment |
JP4673574B2 (en) * | 2003-05-07 | 2011-04-20 | インベンテイオ・アクテイエンゲゼルシヤフト | ELEVATOR EQUIPMENT USING APPARATUS FOR PROVIDING TEMPORARY PROTECTION SPACE, METHOD FOR MOUNTING THE APPARATUS, AND METHOD FOR PROVIDING TEMPORARY PROTECTION SPACE |
DE10334654A1 (en) * | 2003-07-22 | 2005-02-10 | Thyssenkrupp Elevator Ag | cable brake |
CN100408460C (en) * | 2004-07-22 | 2008-08-06 | 上海三菱电梯有限公司 | Apparatus for protecting lifting overspeed of elevator |
CN100361887C (en) * | 2005-03-03 | 2008-01-16 | 朱思中 | Wire rope braking device |
KR100717776B1 (en) | 2005-10-20 | 2007-05-16 | 임미성 | Elevator safety device |
KR100731198B1 (en) * | 2006-03-16 | 2007-06-22 | 세이프테크 (주) | Emergency brake device of an elevator |
EP2358624A1 (en) * | 2008-12-17 | 2011-08-24 | Otis Elevator Company | Elevator braking control |
KR101001648B1 (en) * | 2009-11-17 | 2010-12-17 | 오인수 | A rope braking device for an elevator |
KR101011024B1 (en) * | 2010-08-17 | 2011-01-26 | 배후근 | Rope brake |
CN101962142A (en) * | 2010-10-29 | 2011-02-02 | 江南嘉捷电梯股份有限公司 | Elevator structure |
JP5714345B2 (en) * | 2011-01-27 | 2015-05-07 | 東芝エレベータ株式会社 | Elevator brake system |
CN102303803A (en) * | 2011-05-28 | 2012-01-04 | 赵强 | Sliding rope braking scheme and device for friction type hoist |
CN102976177A (en) * | 2011-09-02 | 2013-03-20 | 日立电梯(中国)有限公司 | Entrapment and breakdown emergency rescue device of elevator withoutmachine room |
CN102767583A (en) * | 2012-07-27 | 2012-11-07 | 徐州工业职业技术学院 | Pulse brake applicable to ascending and descending drive devices |
CN102745619A (en) * | 2012-08-06 | 2012-10-24 | 吴江信谊精密五金有限公司 | Full angle brake of elevator hauling ropes |
CN102774774B (en) * | 2012-08-06 | 2015-06-10 | 吴江信谊精密五金有限公司 | Brake for protecting elevator traction ropes |
CN103303764A (en) * | 2013-06-20 | 2013-09-18 | 苏州新达电扶梯部件有限公司 | Elevator safety rope clamp device |
CN103381984A (en) * | 2013-07-31 | 2013-11-06 | 杨石红 | Elevator braking system |
CN104627616B (en) * | 2013-11-14 | 2017-01-11 | 珠海格力电器股份有限公司 | Conveying device |
DE102014104865A1 (en) | 2014-04-04 | 2015-10-08 | Thyssenkrupp Ag | Elevator with a braking device |
WO2015177228A1 (en) * | 2014-05-20 | 2015-11-26 | Wittur Holding Gmbh | Hydraulic elevator car brake unit with controllable braking power |
CN104310152B (en) * | 2014-09-19 | 2016-04-27 | 宁波浩渤工贸有限公司 | A kind of elevator rope safety fastening device |
CN104555789B (en) * | 2014-12-17 | 2017-02-01 | 杭州沪宁电梯部件股份有限公司 | Steel wire rope brake |
WO2017072824A1 (en) * | 2015-10-26 | 2017-05-04 | 株式会社日立製作所 | Elevator device |
CN105565172A (en) * | 2016-01-25 | 2016-05-11 | 系新电子技术(苏州)有限公司 | Hoisting rope overspeed brake device |
CN105480810A (en) * | 2016-01-26 | 2016-04-13 | 森赫电梯股份有限公司 | Car upgoing overspeed protection system for elevator |
CN106081782A (en) * | 2016-08-24 | 2016-11-09 | 天津市特种设备监督检验技术研究院 | A kind of split type rope gripper of limiter of speed |
CN107867616B (en) * | 2016-09-27 | 2019-04-02 | 上海三菱电梯有限公司 | Elevator rope gripper |
CN106629310B (en) * | 2017-02-15 | 2019-05-21 | 韩伍林 | Rope brake |
US20200270098A1 (en) * | 2019-02-27 | 2020-08-27 | Otis Elevator Company | Elevator safety with translating safety block |
CN109879135A (en) * | 2019-02-28 | 2019-06-14 | 云南升华电梯有限公司 | Variable-ratio limiter of speed |
CN111776998B (en) * | 2020-07-09 | 2021-09-28 | 河南中电投华新电力工程有限公司 | Maintenance platform and maintenance process for power plant boiler platen superheater |
JP7222126B1 (en) | 2022-01-28 | 2023-02-14 | 東芝エレベータ株式会社 | Rotating rope brake device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2196075A (en) * | 1986-09-09 | 1988-04-20 | Rexroth Mannesmann Gmbh | Braking system |
DE19635245A1 (en) * | 1996-08-30 | 1998-03-05 | Wittur Aufzugteile Gmbh & Co | Emergency brake unit for haulage cable of lift |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5101937A (en) * | 1991-06-03 | 1992-04-07 | Burrell Michael P | Self centering elevator cable safety brake |
US5228540A (en) * | 1992-07-24 | 1993-07-20 | Hollister-Whitney Elevator Corp. | Elevator car brake with shoes actuated by springs |
KR200195906Y1 (en) * | 2000-02-24 | 2000-09-15 | 한재호 | Breaking device for elevator |
-
2000
- 2000-10-21 KR KR2020000029397U patent/KR200221450Y1/en not_active IP Right Cessation
-
2001
- 2001-10-20 EP EP01982879A patent/EP1409389A4/en not_active Withdrawn
- 2001-10-20 AU AU2002214338A patent/AU2002214338A1/en not_active Abandoned
- 2001-10-20 WO PCT/KR2001/001775 patent/WO2002032801A1/en not_active Application Discontinuation
- 2001-10-20 CN CNA018177018A patent/CN1469835A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2196075A (en) * | 1986-09-09 | 1988-04-20 | Rexroth Mannesmann Gmbh | Braking system |
DE19635245A1 (en) * | 1996-08-30 | 1998-03-05 | Wittur Aufzugteile Gmbh & Co | Emergency brake unit for haulage cable of lift |
Non-Patent Citations (1)
Title |
---|
See also references of WO0232801A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002032801A1 (en) | 2002-04-25 |
CN1469835A (en) | 2004-01-21 |
EP1409389A4 (en) | 2005-06-29 |
AU2002214338A1 (en) | 2002-04-29 |
KR200221450Y1 (en) | 2001-04-16 |
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