EP1783089A1 - Treuil d'ascenseur - Google Patents

Treuil d'ascenseur Download PDF

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Publication number
EP1783089A1
EP1783089A1 EP04772325A EP04772325A EP1783089A1 EP 1783089 A1 EP1783089 A1 EP 1783089A1 EP 04772325 A EP04772325 A EP 04772325A EP 04772325 A EP04772325 A EP 04772325A EP 1783089 A1 EP1783089 A1 EP 1783089A1
Authority
EP
European Patent Office
Prior art keywords
annular portion
hoisting machine
braking member
rotation shaft
motor
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Withdrawn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
EP04772325A
Other languages
German (de)
English (en)
Other versions
EP1783089A4 (fr
Inventor
Kenji Mitsubishi Denki Kabushiki Kaisha INOUE
K. Mitsubishi Denki Kabushiki Kaisha NAKAMURA
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 EP1783089A1 publication Critical patent/EP1783089A1/fr
Publication of EP1783089A4 publication Critical patent/EP1783089A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
    • B66D5/08—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect embodying blocks or shoes

Definitions

  • the present invention relates to an elevator hoisting machine for raising and lowering a car and a counterweight.
  • an electromagnetic brake device is provided around a brake disc, so that the size of the entire hoisting machine is rather large. Further, since each pad is pressed against an outer peripheral portion of the brake disc, oil of a main rope scattered as a result of the rotation of the pulley adheres to the outer peripheral portion of a brake disc, resulting in a reduction in a braking force obtained through the pressing of each pad against the brake disc.
  • the present invention has been made with a view toward solving the above-mentioned problems. It is an object of the present invention to provide an elevator hoisting machine allowing a reduction in size and capable of achieving a reduction in the braking force for the rotation of a driving sheave.
  • An elevator hoisting machine includes a hoisting machine main body having a motor and a rotation shaft rotated by the motor; a driving sheave which has an annular portion around an outer peripheral portion of the annular portion an elevator main rope is looped, which is spaced apart from the motor in an axial direction of the rotation shaft, and which can rotate integrally with the rotation shaft; and a brake device which has a braking member capable of being brought into and out of contact with an inner peripheral surface of the annular portion and a displacement device displacing the braking member so that the braking member is brought into and out of contact with the inner peripheral surface, and which is provided inside the annular portion.
  • Fig. 1 is a view, partially in section, of an elevator hoisting machine according to Embodiment 1 of the present invention.
  • Fig. 2 is a sectional view taken along a line II-II of Fig. 1.
  • the hoisting machine 2 has a hoisting machine main body 3, a driving sheave 4 provided on the hoisting machine main body 3 and rotated by the hoisting machine main body 3, and a pair of brake devices 5 for braking the rotation of the driving sheave 4.
  • a plurality of main ropes (not shown) for suspending the car and the counterweight are looped around the driving sheave 4. The car and the counterweight are raised and lowered within the hoistway through the rotation of the driving sheave 4.
  • the hoisting machine main body 3 has a motor 6 supported by the support base 1 and a rotation shaft 7 extending horizontally from the motor 6 and rotated by the motor 6.
  • the forward end portion of the rotation shaft 7 is rotatably supported by the support base 1.
  • the driving sheave 4 is fixed to the intermediate portion of the rotation shaft 7. As a result, the driving sheave 4 and the rotation shaft 7 can rotate integrally.
  • the driving sheave 4 has a pulley portion 8 around which the main ropes are looped and a braking drum 9 fixed to a side portion of the pulley portion 8 so as to be adjacent thereto in the axial direction of the rotation shaft 7.
  • a braking drum 9 fixed to a side portion of the pulley portion 8 so as to be adjacent thereto in the axial direction of the rotation shaft 7.
  • Each main rope is looped around the pulley portion 8 along each groove portion 10.
  • the braking drum 9 is fixed to the side portion of the pulley portion 8 on the side opposite to the hoisting machine main body 3.
  • the braking drum 9 has a fixing portion 11 fixed to the pulley portion 8 and an annular portion 12 provided on the outer peripheral portion of the fixing portion 11 on the side opposite to the pulley portion 8. That is, the braking drum 9 has a recess 13 open on the rotation shaft 7 forward end portion side and formed by the fixing portion 11 and the annular portion 12.
  • the inner peripheral surface of the annular portion 12 has a braking surface 14 extending in the circumferential direction of the annular portion 12.
  • the brake devices 5 are supported by the support base 1.
  • the brake devices 5 are arranged on the inner side of the annular portion 12, that is, in the recess 13. Further, the brake devices 5 are arranged symmetrically with respect to the axis of the rotation shaft 7.
  • Each brake device 5 has a brake shoe 15 that is a braking member capable of being brought into and out of contact with the braking surface 14, and a displacement device 16 displacing the brake shoe 15 so as to bring it into and out of contact with the braking surface 14.
  • the rotation of the driving sheave 4 is braked by a contact of the brake shoes 15 with the braking surface 14.
  • the braking of the rotation of the driving sheave 4 can be canceled by spacing the brake shoes 15 apart from the braking surface 14.
  • Each displacement device 16 has an urging spring 17 for urging the brake shoe 15 so as to bring it into contact with the braking surface 14, and an electromagnet 18 adapted to displace the brake shoe 15 against the urging force of the urging spring 17 so as to space it apart from the braking surface 14.
  • the brake shoes 15 are spaced apart from the braking surface 14 by energizing the electromagnets 18, and are displaced so as to be brought into contact with the braking surface 14 and pressed against the braking surface 14 by stopping the energization of the electromagnets 18.
  • Each brake device 5 is a direct-acting-type brake device in which the urging spring 17 directly urges the brake shoe 15.
  • a pair of guide rails 19 for guiding the brake shoes 15.
  • the brake shoes 15 are guided by the common guide rails 19.
  • the guide rails 19 guide the brake shoes 15 such that they move toward and away from the braking surface 14 in a direction perpendicular to the braking surface 14. Further, the guide rails 19 guide the brake shoes 15 in the direction in which the urging springs 17 urge the brake shoes 15.
  • the guide rails 19 are fixed in position with respect to the support base 1.
  • the dimension of the hoisting machine 2 in the axial direction of the rotation shaft 7 is larger than the dimension thereof in the radial direction. That is, the hoisting machine 2 is a non-reduced-thickness type hoisting machine in which the motor 6 and the driving sheave 4 are arranged so as to be spaced apart from each other in the axial direction of the rotation shaft 7.
  • the brake shoes 15 are displaced toward the braking surface 14, that is, radially outwards, by the urging force of the urging springs 17. At this time, the brake shoes 15 are displaced while guided by the guide rails 19. Thereafter, the brake shoes 15 hit the braking surface 14 and are pressed against the braking surface 14. As a result, the rotation of the driving sheave 4 is braked.
  • the brake shoes 15 When the electromagnets 18 are energized, the brake shoes 15 are displaced toward the electromagnets 18, that is, radially inwards, by the electromagnetic attraction of the electromagnets 18 against the urging force of the urging springs 17. At this time also, the brake shoes 15 are displaced while guided by the guide rails 19. As a result, the brake shoes 15 are spaced apart from the braking surface 14, and the braking of the driving sheave 4 is released.
  • the brake devices 5 are provided on the inner side of the braking drum 9, so it is possible to reduce the size of the hoisting machine 2 in the radial direction thereof, thus making it possible to achieve a reduction in hoisting machine 2 size. Further, the brake shoes 15 are brought into and out of contact with the braking surface 14 in the inner periphery of the braking drum 9, so it is possible to prevent oil of the main rope scattered as a result of the rotation of the driving sheave 4 from adhering to the braking surface 14, thus making it possible to prevent a reduction in the braking force for the rotation of the driving sheave 4.
  • the displacement devices 16 have the urging springs 17 urging the brake shoes 15 so as to bring them into contact with the braking surface 14, and the electromagnets 18 adapted to displace the brake shoes 15 so as to space them apart from the braking surface 14 against the urging force of the urging springs 17, so that it is possible to effect reciprocal displacement of the brake shoes 15 more reliably with a simple construction.
  • the guide rails 19 for guiding the brake shoes 15, so that it is possible to displace the brake shoes 15 still more reliably. Further, when the brake shoes 15 come into contact with the braking surface 14, it is possible to prevent the brake shoes 15 from being drawn into displacement in the rotating direction of the driving sheave 4.
  • the braking drum 9 is fixed to the side portion of the pulley portion 8 on the opposite side of the hoisting machine main body 3, it is also possible to fix the braking drum 9 to the side portion of the pulley portion 8 on the hoisting machine main body 3 side.
  • a recess open on the hoisting machine main body 3 side is formed in the braking drum 9.
  • the brake devices 5 and the guide rails 19 are provided in the recess, which is open on the hoisting machine main body 3 side.
  • Fig. 3 is a view, partially in section, of an elevator hoisting machine according to Embodiment 2 of the present invention.
  • a driving sheave 21 is provided on the intermediate portion of a rotation shaft 7.
  • the driving sheave 21 can rotate integrally with the rotation shaft 7.
  • the driving sheave 21 has an annular portion 22 around the peripheral portion of which main ropes are looped, and a fixing portion 23 provided between the annular portion 22 and the rotation shaft 7 and fixing the annular portion 22 to the rotation shaft 7.
  • the annular portion 22 and the fixing portion 23 of the driving sheave 21 form a recess 24 that is open on the forward end side of the rotation shaft 7.
  • a plurality of groove portions 25 extending in the circumferential direction of the driving sheave 21.
  • a pair of brake devices 5 and a pair of guide rails 19 are provided on the inner side of the annular portion 22, that is, in the recess 24, there are provided a pair of brake devices 5 and a pair of guide rails 19. Constructions of the brake devices 5 and the guide rails 19, respectively, are the same as those of Embodiment 1. The brake devices 5 and the guide rails 19 are supported by the support base 1.
  • the inner peripheral surface of the annular portion 22 has a braking surface 26 extending in the circumferential direction of the annular portion 22.
  • the brake shoes 15 of the brake devices 5 are brought into and out of contact with the braking surface 26. Otherwise, the construction and operation of this embodiment are the same as those of Embodiment 1.
  • the driving sheave 21 has the annular portion 22 around the outer peripheral portion of which the main ropes are looped, and the brake devices 5 are provided on the inner side of the annular portion 22, that is, in the recess 24, so it is possible to reduce the size of the hoisting machine in the radial direction thereof, and it is possible to reduce the size thereof in the axial direction of the rotation shaft 7 as compared with the hoisting machine 2 of Embodiment 1, thus making it possible to achieve a further reduction in hoisting machine size.
  • the brake shoes 15 are brought into and out of contact with the braking surface 26 in the inner periphery of the annular portion 22, so it is possible to prevent oil of the main rope scattered as a result of the rotation of the driving sheave 4 from adhering to the braking surface 26, thus making it possible to prevent a reduction in the braking force for the rotation of the driving sheave 4.
  • the driving sheave 21 has the recess 24 that is open on the forward end side of the rotation shaft 7, it is also possible to provide the driving sheave 21 with a recess that is open on the hoisting machine main body 3 side.
  • the brake devices 5 and the guide rails 19 are provided in the recess that is open on the hoisting machine main body 3 side.
  • the number of the brake devices 5 is two, it may also be one or three or more.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
EP04772325A 2004-08-27 2004-08-27 Treuil d'ascenseur Withdrawn EP1783089A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/012369 WO2006022016A1 (fr) 2004-08-27 2004-08-27 Treuil d'ascenseur

Publications (2)

Publication Number Publication Date
EP1783089A1 true EP1783089A1 (fr) 2007-05-09
EP1783089A4 EP1783089A4 (fr) 2012-09-19

Family

ID=35967239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04772325A Withdrawn EP1783089A4 (fr) 2004-08-27 2004-08-27 Treuil d'ascenseur

Country Status (4)

Country Link
EP (1) EP1783089A4 (fr)
JP (1) JPWO2006022016A1 (fr)
CN (1) CN100526191C (fr)
WO (1) WO2006022016A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100415626C (zh) * 2006-08-18 2008-09-03 陈惠良 滚筒式曳引机
CN110831883B (zh) * 2017-05-24 2021-02-02 三菱电机株式会社 电梯用曳引机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19846671A1 (de) * 1998-10-09 2000-04-13 Erhard Mueller Treibscheibenbremse mit erhöhter Redundanz
EP1078876A2 (fr) * 1999-08-26 2001-02-28 Mitsubishi Denki Kabushiki Kaisha Système d'ascenseur avec machinerie de levage améliorée
WO2003089354A1 (fr) * 2002-04-19 2003-10-30 Mitsubishi Denki Kabushiki Kaisha Systeme de freinage d'urgence destine a un ascenseur
DE202004005300U1 (de) * 2004-03-31 2004-07-08 Lat Suhl Ag Aufzugsantriebseinheit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0228489A (ja) * 1988-07-13 1990-01-30 Toshiba Corp 昇降機用巻上装置
JPH02106590A (ja) * 1988-10-14 1990-04-18 Mitsubishi Electric Corp エレベータ装置
JP3149416B2 (ja) * 1993-10-28 2001-03-26 三菱電機株式会社 エレベータ用巻上機
JPH11157766A (ja) * 1997-11-28 1999-06-15 Hitachi Ltd 巻上機
JP4451034B2 (ja) * 2001-09-26 2010-04-14 三菱電機株式会社 制動装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19846671A1 (de) * 1998-10-09 2000-04-13 Erhard Mueller Treibscheibenbremse mit erhöhter Redundanz
EP1078876A2 (fr) * 1999-08-26 2001-02-28 Mitsubishi Denki Kabushiki Kaisha Système d'ascenseur avec machinerie de levage améliorée
WO2003089354A1 (fr) * 2002-04-19 2003-10-30 Mitsubishi Denki Kabushiki Kaisha Systeme de freinage d'urgence destine a un ascenseur
DE202004005300U1 (de) * 2004-03-31 2004-07-08 Lat Suhl Ag Aufzugsantriebseinheit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006022016A1 *

Also Published As

Publication number Publication date
CN100526191C (zh) 2009-08-12
WO2006022016A1 (fr) 2006-03-02
EP1783089A4 (fr) 2012-09-19
CN1882494A (zh) 2006-12-20
JPWO2006022016A1 (ja) 2008-05-08

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