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WO2019197703A1 - Ascenseur doté d'un agencement de frein à rail - Google Patents

Ascenseur doté d'un agencement de frein à rail Download PDF

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Publication number
WO2019197703A1
WO2019197703A1 PCT/FI2018/050255 FI2018050255W WO2019197703A1 WO 2019197703 A1 WO2019197703 A1 WO 2019197703A1 FI 2018050255 W FI2018050255 W FI 2018050255W WO 2019197703 A1 WO2019197703 A1 WO 2019197703A1
Authority
WO
WIPO (PCT)
Prior art keywords
elevator
brake
arrangement
safety
rail
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.)
Ceased
Application number
PCT/FI2018/050255
Other languages
English (en)
Inventor
Matti RÄSÄNEN
Markku Haapaniemi
Otto Lanz
Lasse Nyman
Mikko VILJANEN
Tarvo Viita-Aho
Kai Guo
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.)
Kone Corp
Original Assignee
Kone 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 Kone Corp filed Critical Kone Corp
Priority to PCT/FI2018/050255 priority Critical patent/WO2019197703A1/fr
Publication of WO2019197703A1 publication Critical patent/WO2019197703A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B17/00—Hoistway equipment
    • B66B17/34—Safe lift clips; Keps
    • 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
    • B66B5/22—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 means of linearly-movable wedges

Definitions

  • the present invention relates to an elevator with a rail brake arrangement as defined in the preamble of claim 1.
  • Another problem in elevator arrangements relates to safety conditions during the loading and un loading of the elevator car when the elevator car doors are open.
  • the el evator car moves a short travel before the safety brake sys tem stops the movement. That may cause damages to people who are just entering to the elevator car or exiting from the elevator car when the unintentional movement takes place.
  • Yet another solution according to prior art for achieving an adequate safety space in the upper part of an elevator shaft is to use one or more turnable buffers or movable pillars that are disposed below the counterweight.
  • the buffer is lifted upright before going onto the roof of the elevator car to work.
  • the length of the buffer is such that the move ment of the counterweight, and at the same time the movement of the elevator car, stops before the elevator car rises too high with respect to the ceiling of the elevator shaft.
  • One problem, among others, in this solution is, however, that the shaft space might have been dimensioned so precisely that there is no proper space in the bottom part of the ele vator shaft for a turnable buffer.
  • One object of the present invention is to eliminate draw backs of prior art technology and to achieve an elevator with a rail brake arrangement, wherein the bouncing effect disturbing loading and unloading the elevator car is mini mized, and wherein the safety arrangement is operationally extremely reliable, easy and fast to use and surely guaran tees a required safety space in the elevator shaft regard less of a possible carelessness or ignorance of the persons performing the tasks in the elevator shaft, and wherein the unintentional movement of the elevator car during loading and unloading can be automatically prevented.
  • the elevator, according to the invention, with a rail brake arrangement is characterized by what is disclosed in the characterization part of claim 1.
  • Other embodiments of the invention are characterized by what is disclosed in the other claims.
  • inventive content of the application can also be defined differently than in the claims presented below.
  • the in ventive content may also consist of several separate inven- tions, especially if the invention is considered in the light of expressions or implicit sub-tasks or from the point of view of advantages or categories of advantages achieved.
  • some of the attributes contained in the claims below may be superfluous from the point of view of separate inventive concepts.
  • the different details present ed in connection with each embodiment can also be applied in other embodiments.
  • at least some of the subordinate claims can, in at least some situations, be deemed to be inventive in their own right.
  • An aspect of the invention is to provide an elevator with a rail brake arrangement, which elevator comprises at least an elevator operating system, a control system, a door control arrangement, a safety system, an elevator car arranged to run in the elevator shaft along guide rails, and a safety brake unit which comprises a rail gripper which is con trolled by a first control arrangement.
  • the safety brake unit comprises a rail brake arrangement which is controlled by a control arrangement, other than the first control arrangement.
  • One advantage of the invention is that the invention enables an elevator where the bouncing effect during loading and un loading the elevator car is minimized.
  • Another advantage of the solution according to the invention is that a number of suspension ropes can be optimized to as close as possible the safety factor.
  • Yet another advantage is that an unin tended movement of the elevator car can be effectively, re liably and safely prevented when the door of the elevator car is open. Means or operations for preventing unintended movement of the elevator car could also be called UCM func tion.
  • Yet another advantage is that the solution is very easy and quick to use, and does require neither awkward working in the elevator shaft nor preliminary procedures at the top end or bottom end of the elevator shaft before the service, maintenance or inspection work, and the solution gives a secure and safe protection for the service, mainte nance or inspection work. Yet one advantage is that the so lution of the invention reduces wear of critical safety de vices during maintenance operations, and it also improves maintenance efficiency by reducing manually activated parts. In addition, the invention reduces possibility of the eleva tor car becoming stuck due to worn guide rails or safety gears and.
  • Yet another advantage of the invention is that invention en ables a safe way of providing an elevator that can have a shallow pit and headroom. Yet a further advantage is that the integration of the rail brakes to the frame of the safe ty gear units takes sense because braking forces are di rected to the same structures as in a gripping situation. Yet a further advantage is that the solution is inexpensive, simple to implement and does not require much space. Yet a further advantage is also that the solution of the invention makes the structures of the elevator lighter and makes func tions of the elevator simpler.
  • Fig. 1 presents in a simplified and diagrammatic side view a part of the building where the back wall of the elevator shaft is removed, and an elevator in the elevator shaft, in which elevator the rail brake arrangement according to the invention can be used,
  • Fig . 2 presents in a simplified and diagrammatic side view the elevator according to Fig. 1 in two different positions: in the uppermost position and in the lowermost position, showing the sizes of the head- room and pit of the elevator,
  • Fig . 3 presents in a simplified and diagrammatic oblique top view one type of integrated safety brake unit according to the invention
  • Fig . 4 presents in a simplified and diagrammatic top view the integrated safety brake unit according to Fig. 3, with an elevator guide rail, and partially cross-sectioned,
  • Fig . 5 presents in a simplified and diagrammatic front view the lower part of the integrated safety brake unit according to Fig. 3,
  • Fig . 6 presents in a simplified and diagrammatic front view a rail brake block according to the invention in its recess in the frame of the safety brake unit according to the invention
  • Fig . 7 presents in a simplified and diagrammatic front view an empty recess for the rail brake block ac cording to the invention.
  • Fig . presents in a simplified and diagrammatic front view a rail brake block according to the invention.
  • FIG. 1 presents in a simplified and diagrammatic side view a part of the building where the back wall of the elevator shaft 1 is removed, and an elevator in the elevator shaft 1, in which elevator the rail brake arrangement according to the invention can be used.
  • the building has four floors 10 served by the elevator.
  • the elevator is a so-called Machine-Room-Less (MRL ) elevator where the elevator machinery 5 with its operating brakes 6 and traction sheave is in the elevator shaft 1 or in an ap- basementte space adjacent to the elevator shaft 1, and in the upper area of the elevator shaft, advantageously just below the ceiling of the elevator shaft 1.
  • MLR Machine-Room-Less
  • the eleva tor comprises among other things an elevator car 2 that is arranged to run up and down in the elevator shaft 1 along guide rails 3 guided by guide shoes 7, and a counterweight 4 or balance weight that is also arranged to run up and down in the elevator shaft 1 along its guide rails which are not presented in figure 1 for the sake of clarity.
  • the elevator car 2 and the counterweight 4 are connected to each other with elevator ropes or hoisting ropes that also are not pre sented in figure 1 for the sake of clarity.
  • the cross sec tion of the hoisting ropes can be round or as a flat rectan gle.
  • the elevator car 2 is also equipped with safety gear arrangement comprising preferably two integrated safety brake units 8 and a synchronizing structure to synchronize the functions of the safety brake units 8.
  • the safety gear arrangement is arranged to stop the movement of the elevator car 2 and to facilitate an easy and safe locking of the ele vator car 2 into the guide rails 3 when needed.
  • the safety gear arrangement used in this embodiment is a bi-directional system, but it can also be a unidirectional system.
  • the elevator comprises at least an operating system, an electrical system, a control system with a con- trol arrangement 9, a safety system with a control arrange ment 9a, a door control arrangement 2b, and a variety of sensor arrangements.
  • the safety system comprises an inspection and/or maintenance mode.
  • Figure 2 presents in a simplified and diagrammatic side view the elevator according to Fig. 1 in two different positions: in the uppermost position and in the lowermost position, showing the heights of the headroom 11 and pit 12 of the el evator. In the uppermost position the elevator car 2 and the counterweight or balance weight 4 are presented in a solid line, and in the lowermost position the elevator car 2 and the counterweight 4 are presented in a dot-and-dash line.
  • the fast, safe and easy locking of the elevator car 2 to the guide rails 3 makes it possible to improve the efficiency of maintenance operations, and in that way safety in elevators with a shallow headroom 11 and/or pit 12 can be easily in creased .
  • FIGS 3-8 present in simplified and diagrammatic views one type of an integrated safety brake unit 8 and a rail brake block according to the invention.
  • the safety brake unit 8 is presented alone without any connection elements or fastening elements.
  • Figure 3 presents the integrated safety brake unit 8 in an oblique top view
  • figure 4 presents the integrated safety brake unit 8 according to figure 3 in a simplified and diagrammatic top view, with an elevator guide rail 3, and partially cross sectioned
  • figure 5 presents in a simplified and diagrammatic front view the lower part of the integrated safety brake unit 8 according to figure 3, a first cover plate 19 removed and the second cover plate 18 in its normal position
  • Figure 6 presents in a simplified and diagrammatic front view a rail brake block 28 according to the invention in its recess 35 in the frame 13 of the safety brake unit
  • figure 7 presents in a simplified and diagrammatic front view an empty recess 35 for the rail brake block 28
  • figure 8 presents in a simplified and diagrammatic front view a rail brake block 28 according to the invention.
  • the safety brake arrangement comprises the safety brake unit 8 that has a substantially solid frame 13, preferably of a rectangular shape, with a longitudinal slot 14 for the guiding flange 3a of the guide rail 3.
  • a rail gripper 15 comprising a first gripping element 16, with one or more gripping surfaces 16a, and a second gripping element 17, is placed in the frame 13 of the safety brake unit 8 substantially in a known way, so that the first gripping element 16 is on the first side of the slot 14 and the second gripping element 17 is on the second side of the slot 14. Placed in that way the first gripping element 16 is on the first side of the guiding flange 3a, and a second gripping element 17 is on the second side of the guiding flange 3a.
  • the second gripping element 17 is a known force element, such as a roller that is arranged to move along a guided path in a known way to cause the rail gripper 15 to grip to the guiding flange 3a of the guide rail 3 in order to stop the movement of the elevator car 2 when needed.
  • the rail gripper 15 is controlled by a first control arrangement 2a of the elevator in a known way.
  • the first control arrangement 2a is a speed governor.
  • the safety brake unit 8 comprises a rail brake arrangement 20 that also is placed in the frame 13 of the safety brake unit 8, making the safety brake unit 8 a multifunctional device.
  • the rail brake ar rangement 20 comprises an actuator unit 20a and a braking unit 20b operatively coupled to the actuator unit 20a.
  • the actuator unit 20a is fastened onto a side of the frame 13 of the safety brake unit 8 with a fastening element 21.
  • the actuator unit 20a comprises a power unit 22, an actuator 24 having a vertically moving motion bar 25 that is driven by the power unit 22, and a motion lever 26 connected at its first end to the free end of the motion bar 25 and at its second end to the braking unit 20b.
  • the power unit 22 is preferably an electric motor.
  • the power unit 22 is connect ed, for example, through a cable 23 to one or more control arrangements 2b, 9, 9a of the elevator, which control ar rangements 2b, 9, 9a are fitted to control the safety brake unit 8, more precisely, the rail brake arrangement 20 of the safety brake unit 8.
  • the speed governor 2a being the first control arrangement for controlling the safety brake unit 8
  • the door control arrangement 2b is the second control arrangement for con trolling the safety brake unit 8
  • the control arrangement 9 of the elevator control system is the third control arrange ment
  • the control arrangement 9a for the elevator safety system is the fourth control arrangement for controlling the safety brake unit 8.
  • the fourth control arrange ment 9a is applied, for example when using the inspection or maintenance mode of the elevator.
  • the safety brake unit 8 can be controlled at least with four different control arrangements; the speed governor 2a, the door control arrangement 2b, control arrangement 9 of the elevator control system, and the control arrangement 9a for the elevator safety system.
  • the braking unit 20b comprises two brake blocks 28, actuat ing shafts 39 and 39a, to move the brake blocks 28, a syn chronizing arrangement 42 to synchronize the movements of the brake blocks 28, and return springs 41 to return the brake blocks 28 to their unoperated state.
  • the brake blocks 28 are placed in their own recesses 35 in the frame 13, at each side of the slot 14, substantially opposite to each other .
  • the two brake blocks 28 are essentially similar to each oth er comprising a body 29 connected to a front plate 30 that can be the same material with the body 29 and integrated with it, or a separate part that is fastened to the body 29.
  • the front plate 30 is equipped with one or more brake pads 31 to press against the guiding flange 3a of the guide rail 3 when the braking unit 20b is activated.
  • the body 29 com prises guiding surfaces 32 to co-operate with the counter guiding surfaces 36 of the recess 35 of the frame 13 in or der to keep the movement of the brake blocks 28 linear.
  • the body 29 comprises first counter surfaces 33 for the first ends of return springs 41 whose second ends lean against second counter surfaces 37 of the recess 35.
  • the body 29 comprises an opening 34 for the actuat ing shaft 39, 39a that is arranged to go through the opening 34 so that the eccentric cam 40 of the actuating shaft 39, 39a is inside the opening 34.
  • the first ends of the actuat ing shafts 39, 39a are pivoted to the cover plates 18 and 19, and the second ends of the actuating shafts 39, 39a are pivoted to openings 38 in the frame 13.
  • the second end of the motion lever 26 is connected at its second end to the first actuating shaft 39a to rotate the first actuating shaft 39a, and the synchronizing arrangement 42 having two toothed lever elements 43, 44 transmits the rotation of the first actuating shaft 39a to the second ac tuating shaft 39 so that both the actuating shafts 39, 39a rotate in the same rate.
  • the solution of the invention uses an electrical control system to activate the rail brake arrangement 20 to stop the elevator car 2 during maintenance operations with the help of a positioning system of the elevator.
  • the operating brakes 6 activate to stop the elevator car 2 and the rail brake arrangement 20 is activated after the elevator car 2 has stopped. Moving the elevator car 2 is allowed only in the opposite direction. If for some reason, both the operating brakes 6 and rail brake arrangement 20 fail at the same time, the bidirectional safety brake units 8 can be activated with a mechanical ac tivation onto guide rails 3.
  • the rail brake arrangement 20 is used as a loading and unloading brake.
  • the actuator unit 20a receives an order to ac tivate the braking unit 20b in order to lock the elevator car 2 to the guide rails 3 with the brake blocks 28.
  • the door is closing the actuator unit 20a receives an order to deactivate the braking unit 20b in order to unlock the elevator car 2 from the guide rails 3 by loosening the brake blocks 28 from the guiding flange 3a of the guide rail 3.
  • the locking and unlocking is controlled by limits switches integrated to the actuator unit 20a.
  • the rail brake arrangement 20 is preferably also used during inspection and maintenance tasks.
  • the eleva tor car 2 is driven to a wanted height and by using an ap limbate application or button the braking unit 20b is giv en an order to lock the elevator car 2 to the guide rails 3 with the brake blocks 28 and to unlock the elevator car 2 from the guide rails 3 by loosening the brake blocks 28 from the guiding flange 3a of the guide rail 3.
  • the elevator is preferably equipped with an au tomatic UCM function, which means preventing an uncontrolled movement of the elevator car 2.
  • the rail brake arrangement 20 is arranged to lock the elevator car 2 automatically to the guide rails 3 with the brake blocks 28 when the door of the elevator car 2 is open.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Abstract

L'invention concerne un ascenseur doté d'un système de frein de sécurité, ledit ascenseur comprenant au moins un système d'exploitation d'ascenseur, un système de commande (9), un agencement de commande de porte (2b), un système de sécurité, une cabine d'ascenseur (2) agencée pour fonctionner dans la cabine d'ascenseur (1) le long de rails de guidage (3), et une unité de frein de sécurité (8) qui comprend un dispositif de préhension de rail (15) qui est commandé par un premier agencement de commande (2a). L'unité de frein de sécurité (8) comprend un agencement de frein de rail (20) qui est commandé par un agencement de commande, autre que le premier agencement de commande (2a).
PCT/FI2018/050255 2018-04-09 2018-04-09 Ascenseur doté d'un agencement de frein à rail Ceased WO2019197703A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2018/050255 WO2019197703A1 (fr) 2018-04-09 2018-04-09 Ascenseur doté d'un agencement de frein à rail

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2018/050255 WO2019197703A1 (fr) 2018-04-09 2018-04-09 Ascenseur doté d'un agencement de frein à rail

Publications (1)

Publication Number Publication Date
WO2019197703A1 true WO2019197703A1 (fr) 2019-10-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2018/050255 Ceased WO2019197703A1 (fr) 2018-04-09 2018-04-09 Ascenseur doté d'un agencement de frein à rail

Country Status (1)

Country Link
WO (1) WO2019197703A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220250872A1 (en) * 2019-08-29 2022-08-11 Dynatech, Dynamics & Technology, S.L. Electromechanical activation of a unidirectional emergency stop device for a lift
ES3005460A1 (es) * 2023-09-12 2025-03-14 Aplicaciones Electromecanicas Gervall S A Dispositivo de seguridad electrónico para ascensores o aparatos elevadores y equipo de frenado electrónico

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2695842A1 (fr) * 2011-04-05 2014-02-12 Mitsubishi Electric Corporation Dispositif d'ascenseur
US20140339025A1 (en) * 2011-12-19 2014-11-20 Inventio Ag Guide/damper arrangement for an elevator
DE102014111359A1 (de) * 2014-05-20 2015-11-26 Wittur Holding Gmbh Verfahren zum Betrieb einer Fahrkorbbremseinheit
CN205873576U (zh) * 2016-06-25 2017-01-11 浙江南奥电梯有限公司 一种电梯安全钳
US20170233219A1 (en) * 2014-08-07 2017-08-17 Inventio Ag Elevator system, brake system for an elevator system and method for controlling a brake system of an elevator system
US20170240381A1 (en) * 2011-03-22 2017-08-24 Otis Elevator Company Elevator braking system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170240381A1 (en) * 2011-03-22 2017-08-24 Otis Elevator Company Elevator braking system
EP2695842A1 (fr) * 2011-04-05 2014-02-12 Mitsubishi Electric Corporation Dispositif d'ascenseur
US20140339025A1 (en) * 2011-12-19 2014-11-20 Inventio Ag Guide/damper arrangement for an elevator
DE102014111359A1 (de) * 2014-05-20 2015-11-26 Wittur Holding Gmbh Verfahren zum Betrieb einer Fahrkorbbremseinheit
US20170233219A1 (en) * 2014-08-07 2017-08-17 Inventio Ag Elevator system, brake system for an elevator system and method for controlling a brake system of an elevator system
CN205873576U (zh) * 2016-06-25 2017-01-11 浙江南奥电梯有限公司 一种电梯安全钳

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220250872A1 (en) * 2019-08-29 2022-08-11 Dynatech, Dynamics & Technology, S.L. Electromechanical activation of a unidirectional emergency stop device for a lift
ES3005460A1 (es) * 2023-09-12 2025-03-14 Aplicaciones Electromecanicas Gervall S A Dispositivo de seguridad electrónico para ascensores o aparatos elevadores y equipo de frenado electrónico

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