EP1902994A1 - Aufzugsvorrichtung - Google Patents

Aufzugsvorrichtung Download PDF

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Publication number
EP1902994A1
EP1902994A1 EP05765669A EP05765669A EP1902994A1 EP 1902994 A1 EP1902994 A1 EP 1902994A1 EP 05765669 A EP05765669 A EP 05765669A EP 05765669 A EP05765669 A EP 05765669A EP 1902994 A1 EP1902994 A1 EP 1902994A1
Authority
EP
European Patent Office
Prior art keywords
friction
car
main rope
coefficient
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Withdrawn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
EP05765669A
Other languages
English (en)
French (fr)
Other versions
EP1902994A4 (de
Inventor
Atsushi Mitsubishi Denki Kabushiki Kaisha 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 EP1902994A1 publication Critical patent/EP1902994A1/de
Publication of EP1902994A4 publication Critical patent/EP1902994A4/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Withdrawn legal-status Critical Current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
    • B66B15/00—Main component parts of mining-hoist winding devices
    • B66B15/02—Rope or cable carriers
    • B66B15/04—Friction sheaves; "Koepe" pulleys

Definitions

  • the present invention relates to a traction-type elevator apparatus for raising/lowering, with the aid of a driving force of a drive device, a car and a counterweight that are suspended within a hoistway by means of a main rope.
  • a main rope for suspending a car and a counterweight may be looped according to a 2:1 roping method.
  • the car is provided with a car suspending pulley
  • the counterweight is provided with a counterweight suspending pulley.
  • the hoisting machine which has a driving sheave, is provided at a bottom within a hoistway.
  • a car-side return pulley and a counterweight-side return pulley are provided in an upper portion of the hoistway.
  • the main rope is connected at one end thereof and the other end thereof to an upper portion of the hoistway.
  • the main rope which extends from the above-mentioned one end thereof to the other end thereof, is sequentially looped around the car suspending pulley, the car-side return pulley, the driving sheave, the counterweight-side return pulley, and the counterweight suspending pulley (see Patent Document 1).
  • Patent Document 1 JP 2004-269074 A
  • sheaves for an elevator apparatus such as a driving sheave, a car suspending pulley, a car-side return pulley and the like, and a main rope for the elevator apparatus are made of iron.
  • a main rope having a surface formed of a resin in order to increase the coefficient of friction with the driving sheave made of iron and improve the traction abilities of the sheaves.
  • this main rope is applied to the aforementioned elevator apparatus, since the frictional forces acting between the respective sheaves and the main rope are large and the number of the sheaves is large as well, a great effort is required in dragging the main rope when the sheaves are fitted with detents, respectively. As a result, the operation of looping the main rope is troublesome.
  • the present invention has been made to solve the above-mentioned problems, and it is therefore an obj ect of the present invention to obtain an elevator apparatus which makes it possible to facilitate an operation of looping a main rope around a plurality of sheaves and homogenize with ease a tensile force applied to the main rope along an entire length thereof even when the main rope has a surface formed of a resin.
  • An elevator apparatus includes: a car and a counterweight that can be raised/lowered within a hoistway; a main rope having a surface formed of a resin, for suspending the car and the counterweight within the hoistway; a drive device having a driving sheave around which the main rope is looped, for rotating the driving sheave to raise/lower the car and the counterweight; and a driven sheave around which the main rope is looped, for being rotated through movement of the main rope, in which: the driven sheave has an outer periphery portion provided with a groove portion into which the main rope is inserted; and the groove portion has an inner surface whose coefficient of friction with the main rope is smaller than a coefficient of friction between iron materials.
  • Fig. 1 is a schematic diagram showing an elevator apparatus according to Embodiment 1 of the present invention.
  • a car 2 and a counterweight 3 are suspended within a hoistway 1 by means of a plurality of main ropes 4.
  • a hoisting machine (drive device) 5 for generating a driving force for raising/lowering the car 2 and the counterweight 3 is provided at a bottom within the hoistway 1.
  • the hoisting machine 5 has a hoisting machine body 6 including a motor, and a driving sheave 7 for being rotated by the hoisting machine body 6.
  • a pair of car suspending pulleys 8 are provided on a lower portion of the car 2.
  • a counterweight suspending pulley 9 is provided on an upper portion of the counterweight 3.
  • a car-side return pulley 10 and a counterweight-side return pulley 11 are provided in an upper portion within the hoistway 1. Further, a car-side cleat device 12 and a counterweight-side cleat device 13 are provided in the upper portion within the hoistway 1.
  • each of the main ropes 4 is connected to the car-side cleat device 12, and the other end 4b of each of the main ropes 4 is connected to the counterweight-side cleat device 13.
  • Each of the main ropes 4, which extends from the above-mentioned one end 4a thereof to the other end 4b thereof, is sequentially looped around the respective car suspending pulleys 8, the car-side return pulley 10, the driving sheave 7, the counterweight-side return pulley 11, and the counterweight suspending pulley 9.
  • the respective main ropes 4 are moved through rotation of the driving sheave 7.
  • the car suspending pulleys 8, the counterweight suspending pulley 9, the car-side return pulley 10, and the counterweight-side return pulley 11 are rotated. That is, the car suspending pulleys 8, the counterweight suspending pulley 9, the car-side return pulley 10, and the counterweight-side return pulley 11 are designed as driven sheaves, which are rotated through movement of the respective main ropes 4.
  • the car 2 and the counterweight 3 are raised/lowered within the hoistway 1 through movement of the respective main ropes 4.
  • Each of the main ropes 4 is covered with a resinous covering member so as to be prevented from slipping with respect to the respective sheaves 7 to 11. That is, the respective main ropes 4 have surfaces formed of a resin.
  • Mentionable as a material of the covering member is, for example, a resin such as urethane rubber.
  • urethane rubber is adopted as the material of the covering member, the coefficient of friction between a sheave, which is formed of iron, and a main rope is substantially equal to or larger than 0.4.
  • Fig. 2 is a sectional view showing the car-side return pulley 10 of Fig. 1 .
  • the car-side return pulley 10 is provided on a horizontally extending stationary shaft 14.
  • a bearing 15 is interposed between the car-side return pulley 10 and the stationary shaft 14.
  • the car-side return pulley 10 is rotatable around the stationary shaft 14.
  • a plurality of groove portions 16 extending in a circumferential direction of the car-side return pulley 10 are provided in an outer periphery portion of the car-side return pulley 10.
  • the main ropes 4 are inserted in the groove portions 16, respectively.
  • Fig. 3 is a sectional view showing the outer periphery portion of the car-side return pulley 10 of Fig. 2 .
  • linings 17 forming inner surfaces of the groove portions 16 are provided therein, respectively.
  • the main ropes 4 are in contact with the linings 17, respectively.
  • Acoefficient of friction between the linings 17 and the main ropes 4 is smaller than a coefficient of frictionbetweenironmaterials. That is, the linings 17 are made of a material whose coefficient of friction with the main ropes 4 is smaller than the coefficient of friction between the iron materials.
  • the material of the linings 17 are, for example, a fluorinated resin (Teflon®), a plated material scattered with a solid lubricant, and the like. It has been experimentally confirmed that there is no hindrance to the operation of looping the main ropes 4 when the coefficient of friction between the main ropes 4 and the linings 17 is smaller than the coefficient of friction between the iron materials. In this example, the coefficient of friction between the linings 17 and the main ropes 4 is smaller than about 0.2, which is a value smaller than the coefficient of friction between the iron materials.
  • the respective car suspending pulleys 8, the counterweight suspending pulley 9, and the counterweight-side return pulley 11 are constructed in the same manner as the car-side return pulley 10.
  • a plurality of groove portions (not shown), into which the main ropes 4 are inserted respectively, are provided in an outer periphery portion of the driving sheave 7.
  • the respective groove portions of the driving sheave 7 has inner surfaces formed of iron. That is, the coefficient of friction between the inner surfaces of the groove portions 16 provided in the driven sheaves 8 to 11 and the main ropes 4 is smaller than a coefficient of friction between the inner surfaces of the groove portions provided in the driving sheave 7 and the main ropes 4.
  • a chain or the like is used, for example, to suspend the car 2 and the counterweight 3 to fix them within the hoistway 1.
  • the respective car suspending pulleys 8, the counterweight suspending pulley 9, the car-side return pulley 10, and the counterweight-side return pulley 11 are fitted with detents so as to be prevented from rotating through contact with the main ropes 4.
  • each of the main ropes 4 is connected to the car-side cleat device 12.
  • the respective main ropes 4 are sequentially looped around the respective car suspending pulleys 8, the car-side return pulley 10, the drive sheave 7, the counterweight-side return pulley 11, and the counterweight suspending pulley 9 while being dragged.
  • the other end 4b of each of the main ropes 4 is connected to the counterweight-side cleat device 13.
  • the car-side cleat device 12 and the counterweight-side cleat device 13 are operated to adjust the tensile forces applied to the respective main ropes 4, so the vertical positions of the above-mentioned one end 4a and the other end 4b of each of the respective main ropes 4 are adjusted.
  • the main ropes 4 slip with respect to the driven sheaves 8 to 11 in such a direction that the magnitudes of the tensile forces applied to the main ropes 4 along the entire length thereof are homogenized (such a direction that the discrepancies among the tensile forces decrease) while the discrepancies among the magnitudes of the tensile forces are still small.
  • the coefficient of friction between the inner surfaces of the respective groove portions 16 provided in the outer periphery portions of the driven sheaves 8 to 11 and the main ropes 4 is smaller than the coefficient of friction between the iron materials. Therefore, even when the surfaces of the main ropes 4 are formed of a resin unlikely to cause slippage, the main ropes 4 can be made liable to slip with respect to the driven sheaves 8 to 11. As a result, the operation of looping the main ropes 4 around the driving sheave 7 and the driven sheaves 8 to 11 can be facilitated.
  • the linings 17 forming the inner surfaces of the groove portions 16 are provided therein and made of, for example, a fluorinated resin or the like. Therefore, even when the surfaces of the main ropes 4 are formed of a resin unlikely to cause slippage, the main ropes 4 can be made likely to slip with respect to existing driven sheaves merely by providing (coating) groove portions of the driven sheaves with linings, respectively. Accordingly, the driven sheaves 8 to 11 can be manufactured at low cost and with ease through effective utilization of the existing driven sheaves.
  • the linings 17 are provided in the groove portions 16 respectively to reduce the coefficient of friction between the main ropes 4 and the groove portions 16.
  • the outer periphery portions themselves of the driven sheaves 8 to 11 may be made out of a material whose coefficient of friction with the main ropes 4 is smaller than the coefficient of friction between the iron materials so as to reduce the coefficient of friction between the inner surfaces of the groove portions and the main ropes 4.
  • Fig. 4 is a sectional view showing the outer periphery portion of the car-side return pulley 10 according to Embodiment 2 of the present invention.
  • the car-side return pulley 10 has a sheave body 21, and a sheave outer periphery portion 22 provided on the sheave body 21 so as to surround it.
  • the sheave body 21 is made of iron.
  • the sheave outer periphery portion 22 is made of a material whose coefficient of friction with the main ropes 4 is smaller than the coefficient of friction between the iron materials. Mentionable as the material of the sheave outer periphery portion 22 is, for example, ultra high molecular polyethylene, high-density polyethylene, polypropylene, or the like.
  • the sheave outer periphery portion 22 is provided with a plurality of groove portions 23 into which the main ropes 4 are inserted, respectively.
  • the main ropes 4 are in contact with inner surfaces of the groove portions 23, respectively.
  • the inner surfaces of the respective groove portions 23 are formed of the material of the sheave outer periphery portion 22. That is, the coefficient of friction between the inner surfaces of the groove portions 23 and the main ropes 4 is smaller than the coefficient of friction between the iron materials. In this example, the coefficient of friction between the groove portions 23 and the main ropes 4 is smaller than 0.2.
  • the respective car suspending pulleys 8, the counterweight suspending pulley 9, and the counterweight-side return pulley 11 are constructed in the same manner as the car-side return pulley 10 ( Fig. 4 ).
  • Embodiment 2 of the present invention is identical to Embodiment 1 of the present invention in other constructional details.
  • the sheave outer periphery portion 22 of each of the driven sheaves 8 to 11 is made of, for example, ultra high molecular polyethylene or the like. Therefore, the coefficient of friction between the inner surfaces of the groove portions 23 provided in the sheave outer periphery portion 22 and the main ropes 4 can be made smaller than the coefficient of friction between the iron materials.
  • the main ropes 4 can be made likely to slip with respect to the driven sheaves 8 to 11, so the operation of looping the main ropes 4 around the driving sheave 7 and the driven sheaves 8 to 11 can be facilitated. Further, the tensile forces applied to the respective main ropes 4 along the entire length thereof can be easily homogenized as well.
  • the coefficient of friction between the main ropes 4 and the groove portions 23 can be kept small. Still further, even when the interiors of the groove portions cannot be coated with linings for some reason, the driven sheaves 8 to 11 can be manufactured with ease.
  • Embodiment 2 of the present invention only the outer periphery portions of the driven sheaves 8 to 11 are made of the material whose coefficient of friction with the main ropes 4 is smaller than the coefficient of friction between the iron materials.
  • the driven sheaves 8 to 11 themselves may be made of a material whose coefficient of friction with the main ropes 4 is smaller than the coefficient of friction between the iron materials.
  • Fig. 5 is a sectional view showing the outer periphery portion of the car-side return pulley 10 according to Embodiment 3 of the present invention.
  • the car-side return pulley 10 is made of the same material as the sheave outer periphery portion 22 according to Embodiment 2 of the present invention.
  • the outer periphery portion of the car-side return pulley 10 is provided with a plurality of groove portions 31 into which the main ropes 4 are inserted, respectively.
  • the main ropes 4 are in contact with inner surfaces of the groove portions 31, respectively.
  • the inner surfaces of the respective groove portions 31 are formed of the material of the car-side return pulley 10.
  • the coefficient of friction between the inner surfaces of the groove portions 31 and the main ropes 4 is smaller than the coefficient of friction between the iron materials.
  • the coefficient of friction between the groove portions 31 and the main ropes 4 is smaller than 0.2.
  • the respective car suspending pulleys 8, the counterweight suspending pulley 9, and the counterweight-side return pulley 11 are constructed in the same manner as the car-side return pulley 10 ( Fig. 5 ).
  • Embodiment 3 of the present invention is identical to Embodiment 1 of the present invention in other constructional details.
  • the driven sheaves 8 to 11 themselves are made of the material whose coefficient of friction with the main ropes 4 is smaller than the coefficient of friction between the iron materials, the operation of looping the main ropes 4 around the driving sheave 7 and the driven sheaves 8 to 11 can be facilitated, and the tensile forces applied to the respective main ropes 4 along the entire length thereof can be easily homogenized as well, as in the case of Embodiment 2 of the present invention. Further, even when the groove portions 31 have been abraded due to the friction between the main ropes 4 and the groove portions 31, the coefficient of friction between the main ropes 4 and the groove portions 31 can be kept small. Still further, the respective driven sheaves 8 to 11 can be manufactured through integral molding. Consequently, the driven sheaves 8 to 11 can be manufactured more easily.

Landscapes

  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
EP05765669A 2005-07-13 2005-07-13 Aufzugsvorrichtung Withdrawn EP1902994A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/012904 WO2007007400A1 (ja) 2005-07-13 2005-07-13 エレベータ装置

Publications (2)

Publication Number Publication Date
EP1902994A1 true EP1902994A1 (de) 2008-03-26
EP1902994A4 EP1902994A4 (de) 2013-02-27

Family

ID=37636808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05765669A Withdrawn EP1902994A4 (de) 2005-07-13 2005-07-13 Aufzugsvorrichtung

Country Status (4)

Country Link
EP (1) EP1902994A4 (de)
JP (1) JPWO2007007400A1 (de)
CN (1) CN101048332A (de)
WO (1) WO2007007400A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2679532A1 (de) * 2012-06-27 2014-01-01 Kone Corporation Aufzug-Seilrolle
US9701517B2 (en) 2012-05-04 2017-07-11 Otis Elevator Company Methods and apparatuses for applying a substrate onto an elevator sheave
US10773929B2 (en) 2014-07-31 2020-09-15 Otis Elevator Company Sheave for elevator system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5060567B2 (ja) * 2010-01-22 2012-10-31 株式会社日立製作所 エレベーターのロープ巻き掛け方法、及び部材
CN105270957B (zh) * 2014-07-25 2018-11-09 蒂森克虏伯电梯（上海）有限公司 一体式轴承轮装置及具有该一体式轴承轮装置的电梯
CN108502685A (zh) * 2018-03-21 2018-09-07 永大电梯设备（中国）有限公司 一种电梯用高摩擦系数曳引轮

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040026676A1 (en) * 2002-08-06 2004-02-12 Smith Rory Stephen Modular sheave assemblies
US20040256180A1 (en) * 2003-06-19 2004-12-23 Roland Eichhorn Elevator for transporting a load by means of a movable traction means

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI119234B (fi) * 2002-01-09 2008-09-15 Kone Corp Hissi
EP1516845B1 (de) * 2002-06-27 2010-01-20 Mitsubishi Denki Kabushiki Kaisha Seil für aufzug und verfahren zur herstellung des seils

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040026676A1 (en) * 2002-08-06 2004-02-12 Smith Rory Stephen Modular sheave assemblies
US20040256180A1 (en) * 2003-06-19 2004-12-23 Roland Eichhorn Elevator for transporting a load by means of a movable traction means

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007007400A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9701517B2 (en) 2012-05-04 2017-07-11 Otis Elevator Company Methods and apparatuses for applying a substrate onto an elevator sheave
US10647547B2 (en) 2012-05-04 2020-05-12 Otis Elevator Company Methods and apparatuses for applying a substrate onto an elevator sheave
EP2679532A1 (de) * 2012-06-27 2014-01-01 Kone Corporation Aufzug-Seilrolle
US10773929B2 (en) 2014-07-31 2020-09-15 Otis Elevator Company Sheave for elevator system

Also Published As

Publication number Publication date
WO2007007400A1 (ja) 2007-01-18
CN101048332A (zh) 2007-10-03
JPWO2007007400A1 (ja) 2009-01-29
EP1902994A4 (de) 2013-02-27

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