EP1739047A1 - Dämpfungsvorrichtung für einen aufzug - Google Patents

Dämpfungsvorrichtung für einen aufzug Download PDF

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Publication number
EP1739047A1
EP1739047A1 EP05728716A EP05728716A EP1739047A1 EP 1739047 A1 EP1739047 A1 EP 1739047A1 EP 05728716 A EP05728716 A EP 05728716A EP 05728716 A EP05728716 A EP 05728716A EP 1739047 A1 EP1739047 A1 EP 1739047A1
Authority
EP
European Patent Office
Prior art keywords
vibration
elevator
elevator cage
cage
damping 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.)
Withdrawn
Application number
EP05728716A
Other languages
English (en)
French (fr)
Other versions
EP1739047A4 (de
Inventor
Yuuichiro c/o Fuchu Complex KAIDA
Masaaki c/o Fuchu Complex HIRAI
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.)
Toshiba Elevator and Building Systems Corp
Original Assignee
Toshiba Elevator Co Ltd
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 Toshiba Elevator Co Ltd filed Critical Toshiba Elevator Co Ltd
Publication of EP1739047A1 publication Critical patent/EP1739047A1/de
Publication of EP1739047A4 publication Critical patent/EP1739047A4/de
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/02Cages, i.e. cars
    • B66B11/026Attenuation system for shocks, vibrations, imbalance, e.g. passengers on the same side
    • B66B11/028Active systems
    • B66B11/0286Active systems acting between car and supporting frame

Definitions

  • the present invention relates to a vibration damping device including a movable weight movably supported on an elevator cage and capable of being driven for movement to damp the vibration of the elevator cage. More specifically, the present invention relates to techniques for improving a vibration damping device for efficiently damping the vibration of an elevator cage.
  • a cage assembly 1 for an elevator has an elevator cage 4 supported on a cage frame 2 via vibration insulating members 3.
  • a main rope 5 suspended from a hoist, not shown, is connected to the cage frame 3 via a vibration insulating member 6 to move the cage assembly 1 vertically in an elevator shaft 7.
  • Guide rollers 9 are supported on the four corners of the cage frame 2 via vibration insulating members 8. The guide rollers 9 roll on a right guide rail 10R and a left guide rail 10L attached vertically to walls 7a defining the elevator shaft 7 to guide the cage assembly 1 for vertical movement.
  • a vibration damping device 12 shown in Fig. 7 fastened to the bottom of the elevator cage 4 includes a ball screw 14, a drive motor 13 for rotating the ball screw 14 in opposite directions, a movable weight 15 engaged with the ball screw 14 for movement in opposite directions along the axis of the ball screw 14, an accelerometer 16 fixed to the elevator cage 4 and a controller 17 for controlling the drive motor 13 on the basis of a signal provided by the accelerometer 16.
  • Ride comfort can be improved by counteracting vibrations of the elevator cage 4 by inertial forces produced by forcibly displacing the movable weight 15.
  • the signal provided by the accelerometer 16 included in the foregoing known vibration damping device 12 includes a signal component representing the vibration of the building caused by wind. Consequently, the controller 17 inevitably drives the movable weight 15 to counteract the vibration of the building.
  • the frequency of the vibration of a flexible, high-rise building is as low as 5 Hz or below and the displacement is on the order of several hundreds millimeters. Therefore, the movable weight 15 needs to have a very large mass and the stroke of the movable weight 15 needs to be very long and, consequently, the size of the vibration damping device 12 become large.
  • the displacement of the elevator cage 4 relative to the guide rails 10R and 10L is several millimeters.
  • the vibration of the building is outside a range with which the vibration damping device is expected to cope and does not need to cope with, because the building itself is vibrating.
  • Vibrations of the elevator cage 4 to be damped to improve ride comfort are those of low natural frequencies of the vibration insulating members 8 and the vibration insulating members 3 interposed between the cage frame 2 and the elevator cage 4.
  • Unnecessary widening of the frequency range of vibrations to be damped by the vibration damping device 12 entails the enlargement of the vibration damping device 12 and the reduction of the efficiency of damping vibrations of frequencies in a frequency band to be damped.
  • the ride comfort of the elevator cage will be deteriorated.
  • the movable component such as the ball screw 14 is contaminated with foreign matters, the vibration damping device 12 will be deteriorated and unable to operate smoothly, and the damping effect of the vibration damping device 12 will be reduced.
  • a vibration damping device in a first aspect of the present invention for an elevator including an elevator cage, a cage frame supporting the elevator cage, guide means combined with the cage frame to guide the cage frame in cooperation with guide rails installed in an elevator shaft and first vibration insulating means interposed between the guide means and the cage frame, combined with the elevator cage to damp the vibration of the elevator cage
  • a movable weight movably supported on the elevator cage includes: a movable weight movably supported on the elevator cage; a driving means for displacing the movable weight; a vibration measuring means for measuring the vibration of the elevator cage; filtering means capable of transmitting signals representing vibrations of frequencies in a frequency band including the low natural frequency of the first vibration insulating means included in a signal provided by the vibration measuring means; and a control means for controlling the operation of the driving means on the basis of the signals transmitted by the filtering means.
  • a combination of a low-pass filter and a high-pass filter may be used as the filtering means.
  • the vibration damping device in the first aspect of the present invention for an elevator uses the filtering means for transmitting only the signals representing vibrations of frequencies in the frequency band including the low natural frequency of the first vibration insulating means included in a signal provided by the vibration measuring means, such as an accelerometer or, in other words, this vibration damping device uses the filtering means for reducing the gains of vibrations of frequencies outside the frequency band including the low natural frequency of the first vibration insulating means.
  • the effect of the movable weight and the driving means can be concentratedly used for damping the vibration of the cage frame relative to the guide rails caused by the vibration of a low natural frequency of the first vibration insulating means. Therefore, the damping ability of the movable weight and the driving means can be limited to build the vibration damping device in small, lightweight construction. Consequently, elevator cage has a smaller total mass and power necessary for driving the driving means can be reduced.
  • a vibration damping device in a second aspect of the present invention for an elevator including an elevator cage, a cage frame supporting the elevator cage and a second vibration insulating means interposed between the elevator cage and the cage frame, combined with the elevator cage to damp the vibration of the elevator cage
  • said vibration damping device includes: a movable weight movably supported on the elevator cage; a driving means for displacing the movable weight; a vibration measuring means for measuring the vibration of the elevator cage; a filtering means capable of transmitting signals representing vibrations of frequencies in a frequency band including the low natural frequency of the second vibration insulating means included in a signal provided by the vibration measuring means; and a control means for controlling the operation of the driving means on the basis of the signals transmitted by the filtering means.
  • the filtering means may include, in combination, a low-pass filter and a high-pass filter.
  • the vibration damping device in the second aspect of the present invention for an elevator uses the filtering means for transmitting only the signals representing vibrations of frequencies in the frequency band including the low natural frequency of the second vibration insulating means included in a signal provided by the vibration measuring means, such as an accelerometer or, in other words, this vibration damping device uses the filtering means for reducing the gains of vibrations of frequencies outside the frequency band including the low natural frequency of the second vibration insulating means.
  • the effect of the movable weight and the driving means can be concentratedly used for damping the vibration of the cage frame relative to the cage frame caused by the vibration of a low natural frequency of the second vibration insulating means. Therefore, the damping ability of the movable weight and the driving means can be limited to build the vibration damping device in small, lightweight construction. Consequently, elevator cage has a smaller mass and power necessary for driving the driving means can be reduced.
  • a vibration damping device in a third aspect of the present invention combined with an elevator cage to damp the vibration of the elevator cage includes: a movable weight movably supported on the elevator cage; a driving means for displacing the movable weight; a vibration measuring means for measuring the vibration of the elevator cage; a filtering means capable of attenuating a signal representing the vibration of low natural frequency of a building in which the elevator is installed included in a signal provided by the vibration measuring means; and a control means for controlling the operation of the driving means on the basis of signals transmitted by the filtering means.
  • the filtering means may include a notch filter or in combination, a low-pass filter and a high-pass filter.
  • the vibration damping device in the third aspect of the present invention for an elevator uses the filtering means for attenuating a signal representing the vibration of low natural frequency of a building in which the elevator is installed included in a signal provided by the vibration measuring means or, in other words, this vibration damping device uses the filtering means for reducing the gains of vibrations of low natural frequencies of the building.
  • the driving means does not need to operate for damping the component vibration of the low natural frequency of the building included in the vibration of the elevator cage, the stroke of the movable weight may be short and the movable weight may have a small weight. Therefore, the vibration damping device can be formed in small construction and power necessary for driving the driving means can be reduced.
  • At least the movable weight and the driving means may be held on the elevator cage via a third vibration insulating means.
  • the propagations of high-frequency vibrations generated by the driving means and such to the elevator cage can be prevented and noise in the elevator cage can be reduced to improve ride comfort.
  • Each of the vibration damping devices in the first to the third aspect of the present invention may further include an enclosing means detachably attached to the elevator cage to enclose at least the movable weight and the driving means.
  • an enclosing means detachably attached to the elevator cage to enclose at least the movable weight and the driving means.
  • Each of the vibration damping devices in the first to the third aspect of the present invention may further include a frequency analyzing arithmetic unit capable of processing the frequencies of the signal provided by the vibration measuring means by a frequency analysis process and of calculating the low natural frequency of the building in which the elevator is installed, and a display for displaying the low natural frequency of the building calculated by the frequency analyzing arithmetic unit.
  • a frequency analyzing arithmetic unit capable of processing the frequencies of the signal provided by the vibration measuring means by a frequency analysis process and of calculating the low natural frequency of the building in which the elevator is installed
  • a display for displaying the low natural frequency of the building calculated by the frequency analyzing arithmetic unit.
  • Vibration damping devices embodying the present invention will be described with reference to Figs. 1 to 6.
  • the same parts are denoted by the same reference characters and the duplicate description of those parts will be omitted.
  • a cage assembly 1 has an elevator cage 4 supported on a cage frame 2 via vibration insulating members (second vibration insulating members) 3.
  • a main rope 5 suspended from a hoist, not shown, is connected to the cage frame 3 via a vibration insulating member 6 to move the cage assembly 1 vertically in an elevator shaft 7.
  • Guide rollers 9 are supported on the four corners of the cage frame 2 via vibration insulating members (first vibration insulating members) 8.
  • the guide rollers 9 roll on a right guide rail 10R and a left guide rail 10L attached vertically to walls 7a defining the elevator shaft 7 to guide the cage assembly 1 for vertical movement.
  • a vibration damping device 20 is disposed in a bottom part of the elevator cage 4 to improve ride comfort by attenuating the lateral vibration of the elevator cage 4.
  • the vibration damping device 20 includes stationary members 21 fixed to the bottom surface of the elevator cage 4, and a frame 23 supported on vibration insulating members (third vibration insulating members) 22 mounted on the stationary members 21.
  • a threaded rod 24 is extended horizontally between vertical side members 23a and 23b of the frame 23.
  • the threaded rod 24 is supported rotatably on the vertical side members 23a and 23b.
  • a drive motor 25 is mounted on the right, vertical side wall 23b, as viewed in Fig. 2, and is operatively connected to the threaded rod 24 to rotate the threaded rod 24 in opposite directions.
  • a threaded movable weight 26 is engaged with the threaded rod 24.
  • the threaded rod 24 is rotated to move the movable weight 24 in horizontal directions as viewed in Fig. 2.
  • An accelerometer (vibration measuring means) 27 is installed in the elevator cage 4. The accelerometer 27 measures the vibration of the elevator cage 4 and gives a signal to a controller 28.
  • the controller 28 processes an acceleration signal 31 received from the accelerometer 27 via a low-pass filter 32, a high-pass filter 33, a notch filter 34, an integrator 35 and an amplifier 36 as shown typically in Fig. 3.
  • the processed acceleration signal is given to an adder 37.
  • a weight position signal process unit 39 processes a weight position signal 38 provided by a weight position sensor, not shown, and gives the processed weight position signal to the adder 37.
  • the adder 37 gives a movable weight thrust command signal to the drive motor 25.
  • the filters filtering means
  • filters of different types may be connected in parallel when necessary.
  • Fig. 4 is a gain diagram showing the respective cutoff characteristics 41, 42 and 43 of the low-pass filter, the high-pass filter and the notch filter.
  • the gain of a component representing the low natural frequency of a building in which the elevator is installed included in the signal provided by the accelerometer 27 is reduced.
  • Gains of frequency bands other than a frequency band including the low natural frequencies of the first vibration insulating means 8 and the second vibration insulating means 3 are reduced.
  • the acceleration signal 31 filtered by the notch filter 34 of the vibration damping device 20 in this embodiment does not contain a component corresponding to the low natural frequency of the building in which the elevator is installed.
  • the controller 28 does not need to control the drive motor 25 so as to damp the component corresponding to the low natural frequency of the building included in the vibration of the elevator cage 4. Therefore, the stroke of the movable weight 26 may be short, the vibration damping device 20 can be formed in a small size and power necessary for driving the drive motor 25 can be reduced.
  • the acceleration signal 31 filtered by the low-pass filter 32 and the high-pass filter 33 of the vibration damping device 20 in this embodiment mainly contain a component corresponding to the frequency of vibration attributable to the vibration isolating members (first vibration isolating members) 8 interposed between the guide rails 10R and 10L and the cage frame 2 and a component corresponding to the frequency of the vibration of the cage frame 2 attributable to the natural frequency of the vibration insulating members (second vibration insulating members) 3.
  • the movable weight 26 and the drive motor 25 can be concentratedly used for damping the vibration of the elevator cage 4. Therefore, the movable weight 26 and the drive motor 25 may be small and lightweight. Consequently, the mass of the elevator cage 4 can be reduced and power necessary for driving the drive motor 25 can be reduced.
  • Fig. 5 shows a case (enclosing means) 50 for enclosing the vibration damping device 20.
  • the case 50 includes a box-shaped body 51 attached to the bottom surface of the elevator case 4 and surrounding the vibration damping device 20, and a lid 52 detachably attached to the open lower end of the body.
  • the lid 52 is fastened to the body with bolts 53.
  • Fig. 6 shows the function of the vibration damping device 20.
  • An acceleration signal 61 provided by the accelerometer 27 attached to the elevator cage 4 is given directly to a frequency analyzing unit 62 included in the controller 28 without being filtered by the filters. Then, the frequency analyzing unit 62 processes the acceleration signal 61 to calculate the natural frequency of the building in which the elevator is installed and a display 63 displays the natural frequency of the building.
  • any other measuring device for determining the natural frequency of the building is not necessary and the setting of the controller 28 can be adjusted at site so that the controller 28 can achieve an optimum operation according to the natural frequency of the building. Consequently, a satisfactory vibration damping operation can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Elevator Control (AREA)
EP05728716A 2004-04-06 2005-04-05 Dämpfungsvorrichtung für einen aufzug Withdrawn EP1739047A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004111943A JP4868712B2 (ja) 2004-04-06 2004-04-06 エレベータの制振装置
PCT/JP2005/006666 WO2005097655A1 (ja) 2004-04-06 2005-04-05 エレベータの制振装置

Publications (2)

Publication Number Publication Date
EP1739047A1 true EP1739047A1 (de) 2007-01-03
EP1739047A4 EP1739047A4 (de) 2008-07-23

Family

ID=35124959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05728716A Withdrawn EP1739047A4 (de) 2004-04-06 2005-04-05 Dämpfungsvorrichtung für einen aufzug

Country Status (5)

Country Link
EP (1) EP1739047A4 (de)
JP (1) JP4868712B2 (de)
CN (1) CN1938214A (de)
TW (1) TWI290532B (de)
WO (1) WO2005097655A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2098473A4 (de) * 2006-12-13 2013-05-08 Mitsubishi Electric Corp Aufzugsvorrichtung

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010180033A (ja) * 2009-02-06 2010-08-19 Toshiba Elevator Co Ltd エレベータ制振装置
BR112014003045A2 (pt) * 2011-08-08 2017-03-07 Otis Elevator Co unidade de placa de apoio, e, kit
JP2013095570A (ja) * 2011-11-02 2013-05-20 Hitachi Ltd 制振装置を備えたエレベーター
JP5683720B2 (ja) * 2011-12-13 2015-03-11 三菱電機株式会社 アクティブ動減衰器およびエレベータの振動制御方法
CN105347143B (zh) * 2015-11-27 2018-07-03 东南电梯股份有限公司 一种无导轨液压升降平台及升降方法
JP6449179B2 (ja) * 2016-01-22 2019-01-09 株式会社日立ビルシステム エレベーター
JP6203334B1 (ja) * 2016-06-06 2017-09-27 東芝エレベータ株式会社 エレベータのアクティブ制振装置
CN107673175A (zh) * 2017-10-18 2018-02-09 陕西省特种设备质量安全监督检测中心 一种能够平稳运行的高速电梯
JP7392772B1 (ja) 2022-06-30 2023-12-06 フジテック株式会社 信号処理装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11116166A (ja) * 1997-10-15 1999-04-27 Toshiba Corp エレベータの制振装置
EP1201593A1 (de) * 2000-10-23 2002-05-02 Inventio Ag Verfahren und System zur Kompensation von Schwingungen in Aufzugskabinen
EP1262439A2 (de) * 2001-05-31 2002-12-04 Mitsubishi Denki Kabushiki Kaisha Schwingungsdämpfungseinrichtung für ein Aufzugsystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3041491A1 (de) * 1980-11-04 1982-05-13 Elb-Schliff Edmund Lang, 6113 Babenhausen Steuerung fuer den hydraulischen antrieb des werkstuecktisches einer flachschleifmaschine
JP3213220B2 (ja) * 1995-10-23 2001-10-02 株式会社東芝 エレベータかご室の制振装置
JPH09151064A (ja) * 1995-12-04 1997-06-10 Otis Elevator Co ロープ式エレベーター
JP2003112862A (ja) * 2001-10-04 2003-04-18 Toshiba Elevator Co Ltd エレベータ振動監視装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11116166A (ja) * 1997-10-15 1999-04-27 Toshiba Corp エレベータの制振装置
EP1201593A1 (de) * 2000-10-23 2002-05-02 Inventio Ag Verfahren und System zur Kompensation von Schwingungen in Aufzugskabinen
EP1262439A2 (de) * 2001-05-31 2002-12-04 Mitsubishi Denki Kabushiki Kaisha Schwingungsdämpfungseinrichtung für ein Aufzugsystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2005097655A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2098473A4 (de) * 2006-12-13 2013-05-08 Mitsubishi Electric Corp Aufzugsvorrichtung

Also Published As

Publication number Publication date
EP1739047A4 (de) 2008-07-23
JP4868712B2 (ja) 2012-02-01
CN1938214A (zh) 2007-03-28
WO2005097655A1 (ja) 2005-10-20
TW200604086A (en) 2006-02-01
TWI290532B (en) 2007-12-01
JP2005298071A (ja) 2005-10-27

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