EP1873111A1 - Hebezeugvorrichtung für aufzug - Google Patents

Hebezeugvorrichtung für aufzug Download PDF

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Publication number
EP1873111A1
EP1873111A1 EP05734540A EP05734540A EP1873111A1 EP 1873111 A1 EP1873111 A1 EP 1873111A1 EP 05734540 A EP05734540 A EP 05734540A EP 05734540 A EP05734540 A EP 05734540A EP 1873111 A1 EP1873111 A1 EP 1873111A1
Authority
EP
European Patent Office
Prior art keywords
sheave
rope
guard
hoist
braking
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Withdrawn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
EP05734540A
Other languages
English (en)
French (fr)
Other versions
EP1873111A4 (de
Inventor
Kosei c/o Mitsubishi Denki K.K. MIYAMOTO
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 EP1873111A1 publication Critical patent/EP1873111A1/de
Publication of EP1873111A4 publication Critical patent/EP1873111A4/de
Withdrawn legal-status Critical Current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
    • B66D5/24—Operating devices
    • B66D5/30—Operating devices electrical
    • 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
    • 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
    • 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
    • B66D5/16—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes for action on ropes or cables

Definitions

  • the present invention relates to elevator hoist apparatuses for moving a car up and down by driving a sheave around which a main rope engaged to the car is wound.
  • a sheave is mounted to which a main rope suspending the car of the elevator is engaged.
  • a brake is mounted not only for holding the car in the stopped state, but also for braking the car at an emergency stop; thereby, a rotator connected to the sheave is braked to which the main rope is engaged.
  • this brake for holding the car in the stopped state braking force that can stop moving the car up and down is required in accordance with a live load having any margin in response to the riding capacity of the car.
  • the brake for braking the car at the emergency stop the braking force is limited so that the up-and-down movement of the car is decelerated based on a deceleration speed that does not physically affect a passenger inside the car.
  • the opposite conditions of the braking ability for holding the car in the stopped state and the braking ability for emergently braking the car at the emergency stop are required to be satisfied. Therefore, because the control and maintenance of the braking torque are needed to be accurately performed, expense increases. Moreover, when, in addition to securing the desirable braking ability for holding, lightening of the car and miniaturizing of the hoist motor are accomplished, because its inertial load decreases, the deceleration speed of the car increases at the emergency stop. Therefore, a problem has occurred that the lightening and the miniaturizing of the hoist become difficult.
  • Patent Document 1 a technology is disclosed in Japanese Laid-Open Patent Publication 294,385/2001 (Patent Document 1).
  • a hoist is provided for moving a car up and down by driving a sheave, which is engaged with a main rope for suspending the car, and a slow brake is also provided for decreasing the up-and-down speed of the car, by braking the rotation of a rotator connected to the sheave, based on deceleration that does not physically affect a passenger inside the car.
  • a holding brake that operates after the slow brake operates is provided for braking the rotator, and for holding the stopped car.
  • the slow brake operates so as to decrease the speed of the car
  • the holding brake operates so as to hold the car at the stopped position without sudden deceleration. Therefore, the slow-brake characteristics are independent from the condition of the holding torque; consequently, its designation can be simplified.
  • Patent Document 1 Japanese Laid-Open Patent Publication 294,385/2001
  • the conventional apparatus has a mechanism in which, if the car turns in an over-speed state, the brake provided in the driver operates so as to decelerate the speed of the car.
  • the brake provided in the driver is also used at a time when the car is stopped in the normal operation. For example, due to unfavorable conditions being overlapped, when the braking characteristics of the brake decrease or malfunction occurs that the brake itself does not effectively drive, an emergency-stop device provided in the car or on the balance weight operates, and emergently stops the car; therefore, a problem occurs that the stopping acceleration inside the car increases.
  • Patent Document 1 By using the technology disclosed in Patent Document 1, the above problem can be resolved; however, because the sheave, the slow brake, and the holding brake are newly provided, a problem has occurred that a space for installing them and the number of parts increase.
  • An objective of the present invention which is made to solve the above described problem, is to provide an elevator hoist apparatus that can resolve the problem in which the acceleration for stopping the car increases when the braking characteristics of the brake decrease or malfunction occurs that the brake itself does not effectively drive, and can also prevent the increase of the installing space and the increase of the number of parts.
  • an elevator hoist apparatus includes a hoist; a sheave fixed to the output axis of the hoist; a speed detector for detecting the output-axis rotation speed of the hoist; a rope-guard braking means that functions as a rope guard of the sheave or a deviation sheave in the normal operation, and functions as a breaking means in an emergency; and a control means for detecting abnormality, due to over speed, from the rotation speed detected by the speed detector, and for operating the rope-guard braking means.
  • Fig. 1 is a view illustrating an elevator hoist apparatus according to Embodiment 1 of the present invention.
  • a sheave 2 is fixed to the leading axis of a hoist 1 on a table to which the hoist apparatus is mounted, and a speed detector 3 is coaxially fixed to the output axis of the hoist 1 in order to detect a rotation speed of the sheave 2 rotating due to driving of the hoist 1.
  • a rope 4 for moving a car up and down through the up-and-down path is applied to the sheave 2.
  • the rope 4 is applied to a deviation sheave 5 rotatably fixed to the table to which the hoist apparatus is mounted, so that the rope 4 suspends the car from a predetermined position.
  • a brake for braking the drive axis of the hoist 1 during the normal operation is installed inside the hoist.
  • a rope guard is provided along the periphery of the sheave 2 and the deviation sheave 5 so that the rope 4 is not removed from the sheave 2 and the deviation sheave 5 during the operation.
  • a spare brake other than that is needed to be arranged preparing for a case in which the brake provided inside the hoist 1 used during an operation loses its function to be originally effective, a spare brake other than that is needed to be arranged.
  • a rope-guard braking means 6 is placed, instead of the rope guard, at the position that the rope guard is to be provided. Moreover, a control means 14 for controlling the operation of the rope-guard braking means 6 is electrically connected, and thus, the control means 14 is also electrically connected to the speed detector 3. A structure of the rope-guard braking means 6 is explained.
  • Fig. 2 is a structural view illustrating the rope-guard braking means 6 according to Embodiment 1 of the present invention.
  • a spring 10, which is fixed between the housing 7 and the rope guard 8, is set for forcing in the direction to release the engagement between the engaging portion 7a provided on the housing 7 and the engaging portion 8a of the rope guard 8.
  • an actuator 11, which is fixed to the housing 7, is set for moving in the direction to engage the engaging portion 7a provided on the housing 7 and the engaging portion 8a of the rope guard 8, when it is determined to be abnormal.
  • the actuator 11 adopts an electromagnet structure constituted by the housing 7 also having a stator portion, and by a coil 12 and a movable element 13; that is, the actuator 11 is configured so that, because a magnetic circuit is configured by the housing 7 and the movable element 13 due to the magnetic force generated by current flowing through the coil 12 during the current flowing through the coil 12, attraction force acts, on the movable element 13 fixed to the rope guard 8, in the direction of engaging the engaging portion 7a provided on the housing 7 and the engaging portion 8a of the rope guard 8. Because the control means 14 and the coil 12 are electrically connected to each other, the control means 14 becomes possible to control the coil 12.
  • Fig. 3 is a cross-sectional view viewed from the side of Fig. 2.
  • the slide face of the rope guard 8 is formed so as to slide the sheave 2 and the rope 4 applied to the deviation sheave 5 along their surfaces.
  • a plurality of rope guards 8 is generally fixed to the sheave 2 and the deviation sheave 5
  • a plurality of rope-guard braking means 6 is also fixed. Therefore, without increasing the number of parts, the braking force needed per unit rope-guard braking means 6 can be decreased; consequently, the problem of the space increase can be resolved.
  • the elevator hoist apparatus includes the hoist 1; the sheave 2 fixed to the output axis of the hoist 1; the speed detector 3 for detecting the output-axis rotation speed of the hoist 1; the rope-guard braking means 6 that functions as a rope guard of the sheave 2 or a deviation sheave 5 in the normal operation, and functions as a breaking means in an emergency; and the control means 14 for detecting abnormality, due to the over speed, from the rotation speed detected by the speed detector 3, and for operating the rope-guard braking means 6; therefore, a problem can be resolved, in which the acceleration for stopping the car increases when the braking characteristics of the brake decrease or malfunction occurs that the brake itself does not effectively drive, and the increase of the installing space and the increase of the number of parts can also be prevented.
  • the elevator hoist apparatus is also applicable to an abnormal state such as the blackout.
  • the actuator 11 of the rope-guard braking means 6 has been explained to be configured of the electromagnet composed of the coil 12, the stator, and the movable element 13; however, when significant force is needed for the maintenance, for example, by controlling the position of the movable element 13 using a motor and a reduction gear, the function can also be substituted.
  • the actuator including the electromagnet an oil-pressure cylinder or an air-pressure cylinder may also substitute the function, and thus, due to the configuration using a pump, etc.
  • the rope guard 8 may be configured to be slidable with respect to the sheave 2 and the deviation sheave 5.
  • Fig. 4 is a structural view illustrating the rope-guard braking means 6 according to Embodiment 2 of the present invention.
  • elements other than the elements specifically illustrated are the same as those in Embodiment 1, and the same symbols in Fig. 4 as those in Fig. 2 represent the same elements or the equivalent elements.
  • Embodiment 1 a case has been explained in which the slide face, facing the sheave 2 or the deviation sheave 5, of the rope guard 8 included in the rope-guard braking means 6 is plane; however, in Embodiment 2, the slide face of the rope guard 8 is configured so as to be along the slide-face shape of the sheave 2 or the deviation sheave 5.
  • the slide face of the rope guard 8 is configured so as to be along the slide face of the sheave 2 or the deviation sheave 5, the area of the actual slide face increases; however, in order that the rope 4 is configured not to be removed from the sheave 2 and the deviation sheave 5, because the slide face of the rope guard 8 cannot be narrowed, the force contacting the sheave 2 or the deviation sheave 5 is decreased, and consequently, the rope-guard braking means 6 can be further miniaturized.
  • Embodiment 1 an effect similar to that in Embodiment 1 can be obtained. Moreover, because the slide face of the rope guard 8 is configured so as to be along the slide face of the sheave 2 or the deviation sheave 5, the force contacting the sheave 2 or the deviation sheave 5 can be decreased; therefore, the rope-guard braking means 6 can be further miniaturized.
  • the elevator hoist apparatus according to the present invention is suitable for operating elevators.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP05734540A 2005-04-20 2005-04-20 Hebezeugvorrichtung für aufzug Withdrawn EP1873111A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/007537 WO2006114872A1 (ja) 2005-04-20 2005-04-20 エレベータ用巻上装置

Publications (2)

Publication Number Publication Date
EP1873111A1 true EP1873111A1 (de) 2008-01-02
EP1873111A4 EP1873111A4 (de) 2012-11-14

Family

ID=37214510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05734540A Withdrawn EP1873111A4 (de) 2005-04-20 2005-04-20 Hebezeugvorrichtung für aufzug

Country Status (4)

Country Link
EP (1) EP1873111A4 (de)
JP (1) JPWO2006114872A1 (de)
CN (1) CN1993289B (de)
WO (1) WO2006114872A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014086639A1 (de) * 2012-12-04 2014-06-12 Thyssenkrupp Elevator Ag Seilklemme und aufzuganlage mit seilklemme

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101811635B (zh) * 2009-02-20 2012-09-26 三菱电机株式会社 电梯的绳索摆动检测装置及地震自动恢复运转控制方法
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
CN103224175A (zh) * 2013-04-09 2013-07-31 康力电梯股份有限公司 一种曳引机的制动电路控制器
CN103253577B (zh) * 2013-05-22 2015-09-09 河南科技大学 一种用于悬挂电梯的限速制动系统
JP6395945B2 (ja) * 2015-09-16 2018-09-26 三菱電機株式会社 エレベータのそらせ車交換方法及びそらせ車交換治具
JP6272374B2 (ja) * 2016-03-18 2018-01-31 三菱電機ビルテクノサービス株式会社 ロープ外れ止め点検装置
CN114955778A (zh) * 2022-07-04 2022-08-30 浙江速捷电梯有限公司 一种电梯安全用紧急制动装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131381A (en) * 1982-12-06 1984-06-20 Mitsubishi Electric Corp Traction machine for elevators
EP1792865A1 (de) * 2004-09-09 2007-06-06 Mitsubishi Denki Kabushiki Kaisha Aufzugsvorrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59212371A (ja) * 1983-05-19 1984-12-01 株式会社東芝 エレベ−タ
JPH0631143B2 (ja) * 1986-04-04 1994-04-27 三菱電機株式会社 エレベ−タの安全装置
JP2763244B2 (ja) * 1993-01-07 1998-06-11 三菱電機株式会社 エレベーター用制動装置
JP4439074B2 (ja) * 2000-03-29 2010-03-24 三菱電機株式会社 エレベータの非常停止装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131381A (en) * 1982-12-06 1984-06-20 Mitsubishi Electric Corp Traction machine for elevators
EP1792865A1 (de) * 2004-09-09 2007-06-06 Mitsubishi Denki Kabushiki Kaisha Aufzugsvorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006114872A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014086639A1 (de) * 2012-12-04 2014-06-12 Thyssenkrupp Elevator Ag Seilklemme und aufzuganlage mit seilklemme

Also Published As

Publication number Publication date
EP1873111A4 (de) 2012-11-14
CN1993289A (zh) 2007-07-04
CN1993289B (zh) 2012-04-18
JPWO2006114872A1 (ja) 2008-12-11
WO2006114872A1 (ja) 2006-11-02

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