EP0245686B1 - Braking device for lifting means, such as lifts or goods lifts - Google Patents

Braking device for lifting means, such as lifts or goods lifts Download PDF

Info

Publication number
EP0245686B1
EP0245686B1 EP87106088A EP87106088A EP0245686B1 EP 0245686 B1 EP0245686 B1 EP 0245686B1 EP 87106088 A EP87106088 A EP 87106088A EP 87106088 A EP87106088 A EP 87106088A EP 0245686 B1 EP0245686 B1 EP 0245686B1
Authority
EP
European Patent Office
Prior art keywords
braking
braking device
lifts
jaws
alternate current
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.)
Expired - Lifetime
Application number
EP87106088A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0245686A3 (en
EP0245686A2 (en
Inventor
Angelo Martini
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.)
GMV Martini SpA
Original Assignee
GMV Service SRL
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 GMV Service SRL filed Critical GMV Service SRL
Priority to AT87106088T priority Critical patent/ATE97103T1/de
Publication of EP0245686A2 publication Critical patent/EP0245686A2/en
Publication of EP0245686A3 publication Critical patent/EP0245686A3/en
Application granted granted Critical
Publication of EP0245686B1 publication Critical patent/EP0245686B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention refers to a braking device for lifting means, such as lifts or goods lifts.
  • the present invention refers to a braking device for lifting means, such as lifts or goods lifts normally used in blocks of flats of co-ownership, buildings assigned to dwelling-houses and/or offices and similar.
  • a braking device comprising two coupled braking systems is disclosed in DE-C-1007041.
  • US-A-4232768 discloses an improved brake for winches comprising a first main brake, a second emergency brake, first means for actuating the first brake, second means for actuating the second brake in emergency and means for delaying operation of the second means relating to the first means to apply first and second braking force in sequence in an emergency.
  • Jaw brakes are well known and generally used in the lifting means.
  • the object of the present invention is to eliminate the abovementioned problems.
  • the subject matter of the present invention is a lift comprising an asynchronous alternate current motor, an electromagnetic braking device, provided with braking jaws, a manoeuvring winch comprising a traction pulley of cables supporting an elevator car, at one end, and a counterweight, at the other end, and means for controlling the braking device, characterized in that the means for controlling the braking device consists in supplying the asynchronous alternate current motor with direct current and, simultaneously, the electromagnetic braking device with sequential pulses intermittently acting on the jaws.
  • the asynchronous alternate current motor, with one speed, supplied with direct currents is the first braking system.
  • the electromagnetic braking device with intermittent action on the jaws is the second braking system.
  • the first braking system exercises a braking action at the first stage, which then decreases according to the square of the speed, and the second braking system acts intermittently and with variable braking force.
  • the braking device of the present invention permits us to obtain, in first place, a more regular, precise braking effect since the two coupled braking systems, with simultaneous action, intervene on both the traction motor and on the braking jaws of traditional type. Moreover, the braking action exercised on the motor is of continuous type, while that exercised on the jaws is of intermittent type or with variable force.
  • the braking device for lifting means like lifts or goods lifts, of the present invention, comprises essentially an asynchronous alternate current motor 1, with one speed, connected to the manoeuvring winch 2 by an electromagnetic brake 3.
  • the manoeuvring winch 2 comprises the traction pulley 4 of the cables 5, which support, at one end, elevator car 6 and, at the other end, is suspended the counterweight 7.
  • selector switch 10 presets and automatically intervenes to supply the various parts with the controls necessary to make the manoeuvre.
  • said controls are sent to the braking device sufficiently in advance to guarantee the slowing down and stopping of car 6 exactly in front of space 11, corresponding to the door of each floor 8, so that the level 12 of its floor is perfectly aligned with that or the levels 13.
  • the braking control is sent simultaneously to the asynchronous alternate current motor 1 and the electromagnetic brake 3.
  • the braking action on the asynchronous alternate current motor 1 is obtained by inserting direct current in it, while sequential pulses are sent to the electromagnetic brake 3 which cause its intervention intermittently or with variable force.
  • the intermittent braking action on brake 3 is therefore directed at regulation of the stop run, especially in the final phase, since the real braking action is carried out very efficiently by motor 1 in the first phase, as soon as the direct current is inserted in it.
  • the two braking systems acting simultaneously therefore exercise actions of mutual compensation, giving as final result a constant, regular braking, independent from load.
  • the subsequent intermittent braking interventions with the jaws of brake 3 are more moderate, with the advantage of less wear on said brake.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Control And Safety Of Cranes (AREA)
  • Braking Arrangements (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Elevator Control (AREA)
EP87106088A 1986-05-07 1987-04-27 Braking device for lifting means, such as lifts or goods lifts Expired - Lifetime EP0245686B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87106088T ATE97103T1 (de) 1986-05-07 1987-04-27 Bremseinrichtung fuer hebemittel wie personenoder lastenaufzuege.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8621748U IT208095Z2 (it) 1986-05-07 1986-05-07 Dispositivo di frenatura per mezzi di sollevamento, quali ascensori e montacarichi.
IT2174886U 1986-05-07

Publications (3)

Publication Number Publication Date
EP0245686A2 EP0245686A2 (en) 1987-11-19
EP0245686A3 EP0245686A3 (en) 1990-05-23
EP0245686B1 true EP0245686B1 (en) 1993-11-10

Family

ID=11186302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106088A Expired - Lifetime EP0245686B1 (en) 1986-05-07 1987-04-27 Braking device for lifting means, such as lifts or goods lifts

Country Status (5)

Country Link
EP (1) EP0245686B1 (es)
AT (1) ATE97103T1 (es)
DE (1) DE3788081T2 (es)
ES (1) ES2047481T3 (es)
IT (1) IT208095Z2 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9457987B2 (en) 2011-02-04 2016-10-04 Otis Elevator Company Stop sequencing for braking device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04129988A (ja) * 1990-09-19 1992-04-30 Toshiba Corp エレベータ
FI109684B (fi) * 1998-03-23 2002-09-30 Kone Corp Menetelmä vetopyörähissin jarruttamiseksi ja vetopyörähissi

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232768A (en) * 1978-05-01 1980-11-11 Jacques Dufresne Automatic emergency brake
GB2040857A (en) * 1979-02-07 1980-09-03 Columbus Mckinnon Corp Hoist load positioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9457987B2 (en) 2011-02-04 2016-10-04 Otis Elevator Company Stop sequencing for braking device

Also Published As

Publication number Publication date
DE3788081T2 (de) 1994-03-17
ES2047481T3 (es) 1994-03-01
EP0245686A3 (en) 1990-05-23
IT208095Z2 (it) 1988-03-31
DE3788081D1 (de) 1993-12-16
IT8621748V0 (it) 1986-05-07
EP0245686A2 (en) 1987-11-19
ATE97103T1 (de) 1993-11-15

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