EP2281768A1 - Dispositif élévateur - Google Patents

Dispositif élévateur Download PDF

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Publication number
EP2281768A1
EP2281768A1 EP08765298A EP08765298A EP2281768A1 EP 2281768 A1 EP2281768 A1 EP 2281768A1 EP 08765298 A EP08765298 A EP 08765298A EP 08765298 A EP08765298 A EP 08765298A EP 2281768 A1 EP2281768 A1 EP 2281768A1
Authority
EP
European Patent Office
Prior art keywords
sheave
friction belt
driving sheave
deflecting
driving
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Withdrawn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
EP08765298A
Other languages
German (de)
English (en)
Other versions
EP2281768A4 (fr
Inventor
Atsushi Mitsui
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 EP2281768A1 publication Critical patent/EP2281768A1/fr
Publication of EP2281768A4 publication Critical patent/EP2281768A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B15/00—Main component parts of mining-hoist winding devices
    • B66B15/02—Rope or cable carriers
    • B66B15/04—Friction sheaves; "Koepe" pulleys
    • 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
    • B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
    • B66B11/0476—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation with friction gear, e.g. belt linking motor to sheave

Definitions

  • the present invention relates to a traction elevator apparatus in which a main rope that suspends a car is wound around a driving sheave of a hoisting machine, and that raises and lowers the car by rotating the driving sheave.
  • traction elevator apparatuses in which a main rope that suspends a car and a counterweight is wound around a driving sheave of a hoisting machine, if we let ⁇ be a coefficient of friction between the main rope and the driving sheave, K2 be a coefficient that is determined by a shape of a rope groove that is formed on an outer circumferential portion of the driving sheave, and ⁇ be a contact angle of the main rope relative to the driving sheave, then traction capacity r can be expressed by Formula (1) below.
  • e is the natural logarithm base.
  • tension T1 of the main rope near the car tension T2 of the main rope near the counterweight, and traction capacity ⁇ are designed so as to satisfy the relationship in Formula (2) blow so as to prevent slippage from occurring between the driving sheave and the main rope.
  • Formula (2) represents the relationship between the respective tensions T1 and T2 and the traction capacity ⁇ when T2 is greater than T1.
  • the value of at least one of the coefficient of friction ⁇ , the coefficient K2, or the contact angle ⁇ need only be increased according to Formula (1).
  • the present invention aims to solve the above problems and an object of the present invention is to provide an elevator apparatus that enables size reductions to be achieved and that also enables extension of service life while continuing to ensure a predetermined traction capacity.
  • an elevator apparatus characterized in comprising: a car that can be raised and lowered inside a hoistway; a hoisting machine including: a hoisting machine main body; and a driving sheave that is rotated by the hoisting machine main body, the hoisting machine generating a driving force that raises and lowers the car; a deflecting sheave that is disposed so as to be positioned at a distance from the driving sheave; an endless friction belt that is wound around the driving sheave and the deflecting sheave, and that performs a cyclic motion due to rotation of the driving sheave; and a main rope that is wound continuously around the driving sheave and the deflecting sheave such that the friction belt is interposed, the main rope suspending the car.
  • Figure 1 is a longitudinal section that shows an elevator apparatus according to Embodiment 1 of the present invention.
  • a pair of car guide rails 2 and a pair of counterweight guide rails 3 are installed inside a hoistway 1.
  • a car 4 is disposed hoistably between the car guide rails 2
  • a counterweight 5 is disposed hoistably between the counterweight guide rails 3.
  • the car 4 has a front surface, a back surface, a pair of side surfaces, a bottom surface, and a ceiling surface.
  • a car doorway 4a is disposed on the front surface of the car 4.
  • the back surface of the car 4 faces the front of the car 4 in a depth direction of the car 4.
  • the side surfaces of the car 4 are disposed between the car guide rails 2, and face each other in a direction of frontage of the car doorway 4a.
  • the counterweight 5 is raised and lowered near the back surface of the car 4. Consequently, the car 4 and the counterweight 5 are disposed so as to line up with each other in the depth direction of the car 4 in a projected plane when the hoistway 1 is projected vertically. Moreover, a plane that includes the car guide rails 2 and a plane that includes the counterweight guide rails 3 are parallel.
  • a machine room 6 is disposed in an upper portion of the hoistway 1.
  • a machine base 7 is fixed to a floor surface of the machine room 6.
  • a hoisting machine 8 and a deflecting sheave 9 are supported by the machine base 7.
  • the hoisting machine 8 generates a driving force that raises and lowers the car 4 and the counterweight 5.
  • the hoisting machine 8 has: a hoisting machine main body 10 that includes a motor; and a driving sheave 11 that is disposed on the hoisting machine main body 10, and that is rotated by the hoisting machine main body 10.
  • the driving sheave 11 is rotated around a sheave shaft that is disposed horizontally.
  • the deflecting sheave 9 is disposed so as to be positioned at a distance from the driving sheave 11.
  • the deflecting sheave 9 is rotatably disposed on a sheave shaft that is arranged so as to be parallel to the sheave shaft of the driving sheave 11.
  • the deflecting sheave 9 is disposed at a position that is lower than the position of the driving sheave 11.
  • the driving sheave 11 and the deflecting sheave 9 are composed of a steel material or cast iron, etc., for example.
  • An endless friction belt 12 is wound around the driving sheave 11 and the deflecting sheave 9.
  • a predetermined tension is applied to the friction belt 12 by adjusting the distance between the driving sheave 11 and the deflecting sheave 9.
  • the friction belt 12 is moved cyclically in response to the rotation of the driving sheave 11.
  • the deflecting sheave 9 is rotated in response to the cyclic motion of the friction belt 12.
  • a plurality of main ropes 13 are wound continuously around the driving sheave 11 and the deflecting sheave 9 such that the friction belt 12 is interposed.
  • the car 4 and the counterweight 5 are suspended inside the hoistway 1 by the main ropes 13.
  • the main ropes 13 are constituted by metal ropes. Furthermore, in this example, first end portions of the main ropes 13 are connected to the car 4, and second end portions of the main ropes 13 are connected to the counterweight 5.
  • the main ropes 13 are moved together with the cyclic motion of the friction belt 12.
  • the car 4 and the counterweight 5 are raised and lowered the inside of the hoistway 1 by the movement of the main ropes 13.
  • the car 4 and the counterweight 5 are raised and lowered, the car 4 is guided by the car guide rails 2, and the counterweight 5 is guided by the counterweight guide rails 3.
  • Figure 2 is a cross section that shows the driving sheave 11 and the friction belt 12 from Figure 1 .
  • a plurality of interfitting grooves 14 that are parallel to a direction of rotation of the driving sheave 11 are disposed on an outer circumferential portion of the driving sheave 11.
  • the cross-sectional shapes of the interfitting grooves 14 are constituted by a V shape that has a base side.
  • the friction belt 12 is composed of a wear-resistant high friction material.
  • high friction materials include urethane rubbers, resins, etc. Consequently, the material of the friction belt 12 is constituted by a material that is softer than the respective materials of the driving sheave 11, the deflecting sheave 9, and the main ropes 13.
  • a plurality of interfitting protruding portions 15 that can be fitted together with the interfitting grooves 14 are disposed on an inner circumferential surface of the friction belt 12.
  • a plurality of rope grooves 16 into which the respective main ropes 13 are inserted are disposed on an outer circumferential surface of the friction belt 12.
  • the respective interfitting protruding portions 15 and the respective rope grooves 16 are disposed so as to be parallel to a longitudinal direction of the friction belt 12.
  • a width dimension of the friction belt 12 is identical to a thickness dimension of the driving sheave 11.
  • a plurality of core bodies 17 that are parallel to a longitudinal direction of the friction belt 12 are embedded inside the friction belt 12.
  • the respective core bodies 17 are each configured endlessly.
  • the respective core bodies 17 are disposed side by side in a width direction of the friction belt 12.
  • the respective core bodies 17 are composed of a material (a high strength material) that has higher strength than the high friction material of the friction belt 12.
  • steel wires are used for the core bodies 17. Prevention of breakage of the friction belt 12 is thereby achieved.
  • Predetermined frictional forces are generated between the driving sheave 11 and the friction belt 12, between the deflecting sheave 9 and the friction belt 12, and between the respective main ropes 13 and the friction belt 12.
  • the friction belt 12 thereby performs a cyclic motion that corresponds to the rotation of the driving sheave 11, and the respective main ropes 13 perform motion that corresponds to the cyclic motion of the friction belt 12.
  • maximum frictional forces between the driving sheave 11 and the friction belt 12 and between the deflecting sheave 9 and the friction belt 12 are greater than the maximum frictional force between the respective main ropes 13 and the friction belt 12.
  • maximum frictional force means frictional force before slippage occurs between the members that contact each other. Consequently, even if the respective main ropes 13 slip relative to the friction belt 12, the friction belt 12 is prevented from slipping relative to both the driving sheave 11 and the deflecting sheave 9.
  • an angle obtained by adding the contact angle of the main ropes 13 relative to the deflecting sheave 9 to the contact angle of the main ropes 13 relative to the driving sheave 11 constitutes the contact angle that contributes to traction capacity, enabling the traction capacity to be improved.
  • the friction belt 12 is interposed between the driving sheave 11 and the main ropes 13 and between the deflecting sheave 9 and the main ropes 13, contact between metals that arises between the driving sheave 11 and the main ropes 13 and between the deflecting sheave 9 and the main ropes 13 can be avoided, enabling extension of service life of the driving sheave 11, the deflecting sheave 9, and the main ropes 13, respectively.
  • diameters of the main ropes 13 can be reduced, enabling respective diameters of the driving sheave 11 and the deflecting sheave 9 to be reduced while maintaining a ratio (D/d ratio) between the diameter of the driving sheave 11 and the diameter of the main ropes 13.
  • Size reductions of the hoisting machine 8 and the deflecting sheave 9 can thereby be achieved, enabling overall size reductions of the elevator apparatus.
  • the friction belt 12 can be made less likely to slip relative to both the driving sheave 11 and the deflecting sheave 9, enabling extension of service life of the friction belt 12. In other words, if slippage occurs between the driving sheave 11 and the friction belt 12 and between the deflecting sheave 9 and the friction belt 12, the friction belt 12 is abraded. A worn friction belt 12 is even more likely to slip relative to the driving sheave 11.
  • FIG 3 is a longitudinal section that shows an elevator apparatus according to Embodiment 2 of the present invention.
  • An elevator apparatus according to this example is a type of elevator apparatus in which no machine room is disposed (a machine-roomless elevator apparatus). Consequently, a hoisting machine 8 and a deflecting sheave 9 are disposed inside a hoistway 1.
  • the hoisting machine 8 is a thin hoisting machine in which an axial dimension is smaller than a radial dimension.
  • the hoisting machine 8 has: a thin hoisting machine main body 10 that includes a motor; and a driving sheave 11 that is disposed on the hoisting machine main body 10, and that is rotated by the hoisting machine main body 10.
  • the driving sheave 11 and the deflecting sheave 9 are disposed so as to be spaced apart from each other in a horizontal direction. In other words, the driving sheave 11 and the deflecting sheave 9 is disposed at positions that have identical height.
  • the rest of the configuration is similar to that of Embodiment 1.
  • a driving sheave 11 and a deflecting sheave 9 are disposed at positions that have identical height, dimensions in a height direction of a space for installing the hoisting machine 8 and the deflecting sheave 9 can be reduced. Thus, size reductions in the height direction of the hoistway 1 can be achieved. Because the contact angles that contribute to traction capacity are also similar to those of Embodiment 1 if the driving sheave 11 and the deflecting sheave 9 are disposed at positions that have identical height, improvements in traction capacity can also be achieved.
  • Figure 4 is a longitudinal section that shows an elevator apparatus according to Embodiment 3 of the present invention.
  • Figure 5 is a plan that shows the elevator apparatus from Figure 4 .
  • a counterweight 5 is raised and lowered near one side surface of a car 4. Consequently, the car 4 and the counterweight 5 are disposed so as to line up with each other in a width direction of the car 4 (a direction of frontage of a car doorway 4a) in a projected plane when a hoistway 1 is projected vertically.
  • a plane that includes respective counterweight guide rails 3 is perpendicular to a plane that includes respective car guide rails 2.
  • a fixed member 21 is fixed between respective upper portions of a first car guide rail 2 and a first counterweight guide rail 3.
  • a fixed member 22 is fixed to an upper portion of the second car guide rail 2.
  • a fixed member 23 is fixed between respective upper end portions of each of the counterweight guide rails 3. As shown in Figure 4 , the fixed member 23 is disposed at a position that is higher than a position of the fixed member 21.
  • a hoisting machine 8 is supported by the fixed member 21.
  • a first rope fastening portion 24 is disposed on the fixed member 22.
  • a deflecting sheave 9 is supported by the fixed member 23, and a second rope fastening portion 25 is disposed on the fixed member 23.
  • the hoisting machine 8 and the deflecting sheave 9 are disposed at positions that are outside a region of the car 4 in the projected plane when the hoistway 1 is projected vertically.
  • the deflecting sheave 9 is disposed at a position that is higher than a position of the driving sheave 11.
  • a pair of car suspending sheaves 26 are disposed on a lower portion of the car 4, and a counterweight suspending sheave 27 is disposed on an upper portion of the counterweight 5.
  • the car 4 and the counterweight 5 are suspended by a plurality of main ropes 13. First end portions of the respective main ropes 13 are connected to the first rope fastening portion 24, and second end portions of the respective main ropes 13 are connected to the second rope fastening portion 25.
  • the respective main ropes 13 are wound in sequence from the first rope fastening portion 24 around the respective car suspending sheaves 26, the driving sheave 11, the deflecting sheave 9, and the counterweight suspending sheave 27, to the second rope fastening portion 25.
  • the respective main ropes 13 are wound onto the driving sheave 11 and the deflecting sheave 9 such that a friction belt 12 is interposed.
  • the car 4 and the counterweight 5 are raised and lowered inside of the hoistway 1 by rotation of the driving sheave 11. The rest of the configuration is similar to that of Embodiment 2.
  • a deflecting sheave 9 is disposed at a position that is higher than a position of a driving sheave 11
  • an upper limit position of a range in which a counterweight 3 is raised and lowered can be set higher while maintaining dimensions of a hoistway 1 by raising and lowering the counterweight 3 below the deflecting sheave 9. Consequently, from the viewpoint of layout design, enlargement of the hoistway 1 can be prevented even if dimensions of the counterweight 3 are increased in the height direction.
  • the hoisting machine 8 is larger than the deflecting sheave 9
  • the upper limit position of the range that the counterweight 3 is raised and lowered will be lower than if the deflecting sheave 9 is disposed above the counterweight 3.
  • the dimensions of the hoistway 1 will be increased in the height direction if the driving sheave 11 is disposed at a position that is higher than the position of the deflecting sheave 9.
  • the deflecting sheave 9 by disposing the deflecting sheave 9 at a position that is higher than the position of the driving sheave 11, and raising and lowering the counterweight 3 below the deflecting sheave 9, the upper limit position of the range in which the counterweight 3 is raised and lowered can be set higher while maintaining the dimensions of the hoistway 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
EP08765298.8A 2008-06-06 2008-06-06 Dispositif élévateur Withdrawn EP2281768A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/060485 WO2009147749A1 (fr) 2008-06-06 2008-06-06 Dispositif élévateur

Publications (2)

Publication Number Publication Date
EP2281768A1 true EP2281768A1 (fr) 2011-02-09
EP2281768A4 EP2281768A4 (fr) 2014-04-30

Family

ID=41397841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08765298.8A Withdrawn EP2281768A4 (fr) 2008-06-06 2008-06-06 Dispositif élévateur

Country Status (5)

Country Link
EP (1) EP2281768A4 (fr)
JP (1) JPWO2009147749A1 (fr)
KR (1) KR101238084B1 (fr)
CN (1) CN102056831A (fr)
WO (1) WO2009147749A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105668390A (zh) * 2016-04-12 2016-06-15 波士顿电梯（湖州）有限公司 大包角的电梯曳引系统
WO2019225613A1 (fr) * 2018-05-21 2019-11-28 三菱電機株式会社 Poulie d'ascenseur et procédé de fabrication associé
CN114761344B (zh) * 2019-12-18 2024-02-13 三菱电机株式会社 电梯装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB754678A (en) * 1953-09-14 1956-08-08 Dynamit Nobel Ag Improvements in or relating to pulleys
JP2005306513A (ja) * 2004-04-19 2005-11-04 Hitachi Ltd エレベーター装置
JP2008081256A (ja) * 2006-09-27 2008-04-10 Toshiba Elevator Co Ltd エレベータの駆動方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29924775U1 (de) * 1998-12-22 2005-07-07 Otis Elevator Co., Farmington Aufzugsystem
JP2002145556A (ja) 2000-11-13 2002-05-22 Mitsubishi Electric Corp エレベータ装置
JP3921603B2 (ja) * 2002-01-18 2007-05-30 ニッタ株式会社 エレベータ駆動用ベルト
JP2004026424A (ja) 2002-06-26 2004-01-29 Toshiba Elevator Co Ltd エレベータ設備
JP4114431B2 (ja) * 2002-08-08 2008-07-09 フジテック株式会社 駆動装置
WO2004080875A1 (fr) * 2003-03-10 2004-09-23 Mitsubishi Denki Kabushiki Kaisha Ascenseur
CN2615110Y (zh) * 2003-04-22 2004-05-12 酒井建国 无机房电梯
JP2004323213A (ja) 2003-04-28 2004-11-18 Fujitec Co Ltd ロープ駆動機構

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB754678A (en) * 1953-09-14 1956-08-08 Dynamit Nobel Ag Improvements in or relating to pulleys
JP2005306513A (ja) * 2004-04-19 2005-11-04 Hitachi Ltd エレベーター装置
JP2008081256A (ja) * 2006-09-27 2008-04-10 Toshiba Elevator Co Ltd エレベータの駆動方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2009147749A1 *

Also Published As

Publication number Publication date
CN102056831A (zh) 2011-05-11
KR101238084B1 (ko) 2013-02-27
JPWO2009147749A1 (ja) 2011-10-20
KR20100117122A (ko) 2010-11-02
EP2281768A4 (fr) 2014-04-30
WO2009147749A1 (fr) 2009-12-10

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