EP1860055A1 - Dispositif auxiliaire de frein d élévateur - Google Patents
Dispositif auxiliaire de frein d élévateur Download PDFInfo
- Publication number
- EP1860055A1 EP1860055A1 EP06715173A EP06715173A EP1860055A1 EP 1860055 A1 EP1860055 A1 EP 1860055A1 EP 06715173 A EP06715173 A EP 06715173A EP 06715173 A EP06715173 A EP 06715173A EP 1860055 A1 EP1860055 A1 EP 1860055A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brake
- main ropes
- auxiliary device
- sheave
- brake auxiliary
- 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- Withdrawn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
Images
Classifications
-
- 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
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/08—Driving gear ; Details thereof, e.g. seals with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
-
- 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
- B66B5/16—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
Definitions
- the present invention relates to a brake auxiliary device for an elevator, for assisting braking of a car at a time of emergency braking.
- a braking force of a brake device at a time of emergency braking is excessively large, slip occurs between a sheave and main ropes.
- RPM of the sheave and an elevating speed of a car are detected and compared to each other, thereby calculating a slip velocity, and when the slip velocity exceeds a predetermined value at the time of emergency braking, a braking torque of the brake device is limited (refer to, for example, Patent Document 1).
- Patent Document 1 JP 2004-231355 A
- the present invention has been made to solve the above-mentioned problem, and it is therefore an obj ect of the present invention to provide a brake auxiliary device for an elevator, with which it is possible to suppress, with a simpler structure, slip of main ropes at a time of emergency braking.
- a brake auxiliary device for an elevator includes a brake auxiliary roller, which is rotatable, for pressing a main rope against a sheave which is braked by a brake device at a time of emergency braking.
- Fig. 1 is a structural view showing an elevator apparatus according to Embodiment 1 of the present invention.
- the drive device 1 includes an electric motor 5 for generating a driving force, a drive sheave 6 rotated by the driving force of the electric motor 5, a brake device 7 for braking rotation of the drive sheave 6, and a brake auxiliary device 8 for assisting braking of a car 10 at a time of emergency braking.
- a plurality of main ropes 9 are wound around the drive sheave 6 and the deflector sheave 2.
- the car 10 and a counterweight 11 are suspended by the main ropes 9 within the hoistway.
- Fig. 2 is an enlarged front view showing the brake device 7 of Fig. 1.
- a brake fixing pedestal 15 is fixed in position.
- the brake fixing pedestal 15 is mounted with a pair of brake arms 16.
- Each of the brake arms 16 is pivotable on a proximal end thereof attached to the brake fixing pedestal 15.
- a brake shoe 17 is fixed.
- the distal ends of the brake arms 16 are mounted with a brake spring 18 and a brake releasing portion 19.
- the brake spring 18 causes the brake shoes 17 to press against the brake drum 20. Rotation of the drive sheave 6 is braked by causing the brake drum 20 to be sandwiched by the brake shoes 17.
- the brake releasing portion 19 causes the brake shoes 17 to be spaced apart from the brake drum 20 against the brake spring 18 at a time of releasing the brake, while causing the brake spring 18 to be released at a time of braking.
- an electromagnet or the like is used for the brake releasing portion 19.
- the electromagnet is energized to cause the brake shoes 17 to be spaced apart from the brake drum 20.
- the electromagnet is put in a non-energized state to cause the brake shoes 17 to press against the brake drum 20.
- Fig. 3 is an enlarged perspective view showing the drive sheave 6 and the brake auxiliary device 8 of Fig. 1.
- sheave mounting pedestals 25 are fixed in position.
- a rotating shaft 5a for the electric motor 5 is supported so as to be rotatable.
- the drive sheave 6 is fixed to the rotating shaft 5a.
- the drive sheave 6 is rotated integrally with the rotating shaft 5a about the rotating shaft 5a as a center thereof.
- a support frame 26 is fixed to the shaft mounting pedestals 25.
- the support frame 26 supports the brake auxiliary device 8.
- the brake auxiliary device 8 is arranged so as to be opposed to an outer peripheral surface of the drive sheave 6.
- Fig. 4 is a front view of the brake auxiliary device 8 of Fig. 3, showing a normal state thereof.
- a support arm 28 is fixed to an upper portion of the support frame 26.
- a lower portion of the support arm 28 is mounted with a pressing plate 29 and an auxiliary device releasing portion 30.
- the pressing plate 29 is fixed to the lower portion of the support arm 28.
- the auxiliary device releasing portion 30 is connected to a movable frame 31.
- the movable frame 31 is connected to the lower portion of the support arm 28 through an intermediation of the auxiliary device releasing portion 30 so as to be movable.
- roller mounting arms 33 are fixed to an outer peripheral portion of the movable frame 31. Between tips of the roller mounting arms 33, a brake auxiliary roller 35 is attached so as to be rotatable.
- the brake auxiliary roller 35 is arranged so as to be opposed to a top portion of the drive sheave 6. Further, the brake auxiliary roller 35 includes a plurality of auxiliary roller portions 35a each corresponding to each of grooves 6a of the drive sheave 6. An outer periphery of each of the auxiliary roller portions 35a is provided with a roller groove 35b formed along a surface of each of the main ropes 9. Note that, all of the auxiliary roller portions 35a are formed so as to be integral with an outer peripheral portion of the brake auxiliary roller 35.
- auxiliary device springs 38 Between the pressing plate 29 and a bottomportion of the movable frame 31, there are arranged a plurality of auxiliary device springs 38. That is, the auxiliary device springs 38 are sandwiched by the pressing plate 29 and the bottom portion of the movable frame 31.
- the auxiliary device springs 38 biases the brake auxiliary roller 35 toward the main ropes 9 through intermediations of the movable frame 31 and the roller mounting arms 33.
- the brake auxiliary roller 35 is biased by the auxiliary device springs 38 to be pressed against the main ropes 9, thereby pressing the main ropes 9 against the drive sheave 6.
- the auxiliary device releasing portion 30 moves the movable frame 31 in a direction in which the movable frame 31 is spaced apart from the outer periphery of the drive sheave 6 against the auxiliary device springs 38. That is, the auxiliary device releasing portion 30 causes the brake auxiliary roller 35 to be spaced apart from the main ropes 9 through the intermediation of the movable frame 31. Further, the auxiliary device releasing portion 30 releases the auxiliary device springs 38 at the time of emergency braking. Note that, the auxiliary device releasing portion 30 is operated in conjunction with an emergency braking operation of the brake device 7.
- an electromagnet or the like is used as in the case of the brake releasing portion 19.
- the brake auxiliary roller 35 is spaced apart from the drive sheave 6.
- the auxiliary device springs 38 is released, so the main ropes 9 are pressed against the drive sheave 6 by the brake auxiliary roller 35.
- the auxiliary device springs 38 are released. Accordingly, as shown in Fig. 5, the movable frame 31 is moved in a direction of approaching the outer periphery of the drive sheave 6, and the brake auxiliary roller 35 is pressed against the main ropes 9.
- the brake auxiliary roller 35 rolls on the surfaces of the main ropes 9 until the rotation of the drive sheave 6 stops and presses the main ropes 9 against the drive sheave 6.
- Fig. 6 is a view for illustrating the slip of the main ropes 9 with respect to the drive sheave 6 of Fig. 1.
- tensions T1 and T2 respectively acts due to the car 10 and the counter weight 11.
- conditions on which no slip of the main ropes 9 occurs can be represented as follows.
- ⁇ a value of ⁇ varies to a large extent according to materials of the drive sheave 6 and the main ropes 9 and shapes of the grooves 6a of the drive sheave 6, so is represented by the following equation in general.
- T ⁇ 1 ⁇ ⁇ T ⁇ 2 ⁇ ⁇ ⁇ e ⁇ ⁇ ⁇
- the brake auxiliary roller 35 is rotatable, so the friction between the brake auxiliary roller 35 and the main ropes 9 caused when the brake auxiliary roller 35 is pressed against the main ropes 9 can be reduced, thereby making it possible to prevent the main ropes 9 from being shortened in life.
- the auxiliary device releasing portion 30 causes the brake auxiliary roller 35 to be spaced apart from the main ropes 9 against the auxiliary device springs 38 when the car 10 is in the normal state. Therefore, in the normal state, it is possible to avoid putting more burden on the main ropes 9 than necessary, thereby preventing the main ropes 9 from being shortened in life due to contact with the brake auxiliary roller 35.
- each of the main ropes 9 is not limited. As a matter of course, main ropes each having a circular section or belt-like main ropes each having a flat section may also be used. Further, the auxiliary roller portions 35a may be rotatable independently of one another. Still further, while in the above-mentioned example, only one brake auxiliary roller is shown, a plurality of brake auxiliary rollers may be arranged at intervals therebetween in a circumferential direction of the sheave. Yet further, while in the above-mentioned example, the brake auxiliary roller 35 is pressed against the main ropes 9 by the auxiliary device springs 38, an actuator may be used for pressing.
- an installation location of the drive device is not limited to the upper portion of the hoist way. Still further, while in the above-mentioned example, an elevator apparatus employing a 1:1 roping system is shown, the roping system is not particularly limited. For example, the present invention may be applied also to an elevator apparatus employing a 2:1 roping system. Yet further, while in the above-mentioned example, the drive device (hoisting machine) 1 is provided with the brake device 7 and the brake auxiliary device 8, the brake device 7 and the brake auxiliary device 8 may be provided to another sheave such as a suspension pulley, deflector sheave, or a return pulley.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Braking Arrangements (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005073085 | 2005-03-15 | ||
PCT/JP2006/304090 WO2006098166A1 (fr) | 2005-03-15 | 2006-03-03 | Dispositif auxiliaire de frein d’élévateur |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1860055A1 true EP1860055A1 (fr) | 2007-11-28 |
Family
ID=36991514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06715173A Withdrawn EP1860055A1 (fr) | 2005-03-15 | 2006-03-03 | Dispositif auxiliaire de frein d élévateur |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1860055A1 (fr) |
JP (1) | JPWO2006098166A1 (fr) |
KR (1) | KR20070065294A (fr) |
CN (1) | CN1968885A (fr) |
WO (1) | WO2006098166A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2952464A1 (fr) * | 2014-06-03 | 2015-12-09 | Kone Corporation | Ascenseur |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4946312B2 (ja) * | 2006-09-26 | 2012-06-06 | フジテック株式会社 | エレベータ駆動装置 |
CN102674118A (zh) * | 2012-02-16 | 2012-09-19 | 郭自刚 | 一种钢丝绳防滑装置的电梯曳引机 |
CN105565199B (zh) * | 2016-03-03 | 2017-12-22 | 福安市广源机电有限公司 | 一种电梯曳引机附加防滑制动器 |
CN108046080B (zh) * | 2017-11-28 | 2019-06-14 | 浙江西沃电梯有限公司 | 一种防钢丝绳打滑电梯 |
CN111891873B (zh) * | 2020-08-05 | 2022-01-25 | 鹤山扬阳智能机械装备有限公司 | 一种电梯制动组件 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5024962A (fr) * | 1973-07-06 | 1975-03-17 | ||
JPS5225348A (en) * | 1975-08-21 | 1977-02-25 | Mitsubishi Electric Corp | Emrgency stop device for elevators |
JP4267335B2 (ja) * | 2003-01-30 | 2009-05-27 | 三菱電機株式会社 | エレベータの制動制御装置 |
-
2006
- 2006-03-03 EP EP06715173A patent/EP1860055A1/fr not_active Withdrawn
- 2006-03-03 CN CNA2006800003380A patent/CN1968885A/zh active Pending
- 2006-03-03 KR KR1020077001369A patent/KR20070065294A/ko not_active Application Discontinuation
- 2006-03-03 JP JP2006523477A patent/JPWO2006098166A1/ja active Pending
- 2006-03-03 WO PCT/JP2006/304090 patent/WO2006098166A1/fr not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2006098166A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2952464A1 (fr) * | 2014-06-03 | 2015-12-09 | Kone Corporation | Ascenseur |
US9783390B2 (en) | 2014-06-03 | 2017-10-10 | Kone Corporation | Elevator |
AU2015202967B2 (en) * | 2014-06-03 | 2019-10-03 | Kone Corporation | An elevator |
Also Published As
Publication number | Publication date |
---|---|
CN1968885A (zh) | 2007-05-23 |
WO2006098166A1 (fr) | 2006-09-21 |
KR20070065294A (ko) | 2007-06-22 |
JPWO2006098166A1 (ja) | 2008-08-21 |
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Legal Events
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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 |
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Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
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17P | Request for examination filed |
Effective date: 20061205 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE |
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18W | Application withdrawn |
Effective date: 20071120 |