EP3421406B1 - Dispositif de sécurité pour arrêter un mouvement non contrôlé d'une cabine d'ascenseur - Google Patents

Dispositif de sécurité pour arrêter un mouvement non contrôlé d'une cabine d'ascenseur Download PDF

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Publication number
EP3421406B1
EP3421406B1 EP18171524.4A EP18171524A EP3421406B1 EP 3421406 B1 EP3421406 B1 EP 3421406B1 EP 18171524 A EP18171524 A EP 18171524A EP 3421406 B1 EP3421406 B1 EP 3421406B1
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EP
European Patent Office
Prior art keywords
pin
elevator car
slider
contact plate
safety
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EP18171524.4A
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German (de)
English (en)
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EP3421406A1 (fr
Inventor
Paolo Frigerio
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Individual
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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

Definitions

  • the present invention refers to a safety device for stopping an uncontrolled movement away of an elevator car.
  • the present invention refers to a safety device for stopping an uncontrolled movement away of an elevator car from the level of a floor of the building wherein the elevator is installed, the hoistway door not being blocked or the elevator entrance door not being in the closed position because of a fault occurred in the elevator system.
  • the present invention also refers to a safety device suitable for allowing to stop an uncontrolled movement of an elevator car whenever operators are present inside the hoistway to perform maintenance or repair operations.
  • an elevator is a system the function of which is to lift/lower people and/or things from one floor to another or to different levels of a building and comprises a car suitable for receiving people and things, movable inside a hoistway, said car being moved by means of hoistropes driven by an electric motor or by means of hydraulically operated telescopic plungers, which lift and make the car itself go down.
  • An aspect related to safety is represented, for instance, by the need for an emergency stop of the elevator car in the case of a fault or the like, said stop taking place by way of an emergency braking system comprising a safety brake which slows down or blocks the elevator system in the case of an emergency or, in the case of hydraulic elevators, comprising shut-off valves which act directly onto hydraulic plungers.
  • a further aspect related to safety is represented by the need for stopping the elevator car and preventing uncontrolled movements thereof during test and maintenance operations in order to make those in charge for such operations safe and unharmed; in this connection, safety is guaranteed by way of devices which identify any uncontrolled movements of the elevator car and stop and hold it stationary.
  • any uncontrolled movement of an elevator car is stopped by using an electronic device placed above the elevator car and provided with magnetic sensors, which sense the elevator car being subjected to an uncontrolled movement away and enable such device to trigger braking means which, for instance, act onto the slow shaft of the hoist or operate actuator means of a safety brake.
  • a further drawback related to the safety devices of traditional types is in that the elevator control panel shall also conforms with the regulations in order for the elevator system to meet and conform with the regulations, which might entail the need for replacing the elevator control panel already in use, which means increased costs. It is also worth emphasizing that new and recent regulations and extensions of existing regulations ordered the application of safety devices for stopping any uncontrolled movements away of an elevator car also for elevator systems manufactured before the year 1999.
  • a safety device is disclosed in EP2154096 as suitable for stopping the downward or upward movement of an elevator's car comprising a pair of brakes joined by means of a coupling mean and of an electromechanical actuator which actuates the coupling between the brakes according to a direction which is horizontal with respect to the movement direction of the elevator car, with said electromechanical actuator being aimed to drive the brakes through the coupling mean in case the elevator car reaches a prefixed speed value.
  • DE102011001449 Another known solution is disclosed in DE102011001449 as comprising a device wherein a safety device drives a braking device acting on a guide bar, an actuating device which actuates the braking device in case of falling, said actuating device being connected to a control unit and with the space inside which the car moves which comprises a safety rope to which the actuating device is connected, with said device actuated in case the car speed reaches a value bigger that a predefined speed value.
  • CN103420247 discloses an actuating means suitable for detecting the opening condition of the elevator or a non complete closing condition of the same doors, with said device comprising a leverage system connected to the doors.
  • ITMI20120384 Another solution is disclosed in ITMI20120384 as comprising a safety device for detecting uncontrolled departure movement of an elevator car from a floor level of the building wherein the safety brake is actuated by means of a rope connected to the safety device.
  • a safety device for stopping an uncontrolled movement away of an elevator car, comprising an actuator means and a safety brake of a bidirectional type, connected to each other and stabilized with respect to the structure of an elevator car frame.
  • the safety device for stopping an uncontrolled movement away of an elevator car indicated by the reference numeral 10 as a whole in the mentioned figures, comprises an actuator means 12 and a safety brake 13 connected to each other and stabilized with respect to the structure of the elevator car frame as described in details below.
  • the actuator means 12 and the safety brake 13 which make up the device according to the invention are secured to the structure of the elevator car and conveniently to the upper part of a traditional elevator car frame (not represented in the figures) or, alternatively, to the lower part of the car frame, said elevator car being movable and slidable along guides or uprights 15, said actuator means 12 and safety brake 13 being secured to said car frame by way of fixing blocks or brackets 14.
  • Figure 1 illustrates a condition wherein the device according to the invention is connected to the structure of the elevator car in correspondence with the upper part of the car frame by way of the above mentioned fixing blocks or brackets 14 by using screws or equivalently known retention elements.
  • the actuator means 12 comprises a guide means 16, substantially consisting of a metal pipe 16' secured to one of the fixing blocks or brackets 14 by way of a support element 18, the guide means 16 being connected to the support element 18 by way of a hinge 20 featuring a horizontal axis of rotation suitable for enabling said guide means 16 to oscillate in a vertical plane as described in more details below.
  • a slider or pin 22 Inside the metal pipe 16' and coaxially thereto there is arranged a slider or pin 22, an end 22' of which projects from the pipe 16' by a certain length; inside said metal pipe there are arranged means suitable for allowing the slider or pin 22 to slide, said means not being described in details in that they consist of anti-friction means of the bushing type or the like, commonly known to those skilled in this art.
  • the metal pipe 16' thus defines a guide means for the cursor or pin 22.
  • a sleeve 24, coaxial to the metal pipe, is secured, the function of which is to make it possible the connection of a means suitable for displacing the slider or pin 22, said means consisting of an electric actuator 26, more specifically an electromagnetic actuator; said electric actuator 26, when energized, allows to hold the slider or pin 22 in a position close to said electromagnet (first position), i.e. a retracted position with respect to the metal pipe 16', opposite to a second position wherein said slider or pin 22 in in the extended position with respect to the metal pipe 16'.
  • first position i.e. a retracted position with respect to the metal pipe 16'
  • a pair of microswitches 28 and 29 are also arranged the function of which is to detect the position of the slider or pin 22 in the first and second positions.
  • the safety brake 13 is of a bidirectional type, is secured to one of the fixing blocks or brackets 14, and comprises a body 13', activation levers 13" secured to both fixing blocks or brackets 14, and a synchronization shaft 13'''.
  • connection means 30 which comprises a contact plate 31 and a further contact plate 31' substantially parallel to each other and to a shock absorbing element for said two plates, consisting of a first elastic element 32, a second elastic element 32', and a connection pin 32" for interconnecting said elastic elements.
  • the first elastic element 32 is arranged between the contact plate 31 and the further contact plate 31', and the second elastic element 32' is arranged in contact with the further contact plate 31' on the opposed side with respect to the contact plate 31, the connection pin 32" being inserted coaxially to said first and second elastic elements so as to hold them in line.
  • the further contact plate 31' is secured to the lever 13" by way of screws 31" or equivalent retention elements.
  • a metal plate 40 secured to one of the guides or uprights 15 or to the wall of the hoistway within which the elevator car moves, comprises a through opening 41 which the end 22' of the pin or slider 22 can engage whenever said pin or slider is in the second position, i.e. is extended with respect to the end of the pipe 16'; said through opening is of a slotted type to make it possible to accommodate and compensate for any inaccurate stops or releveling movements with respect to the level of the elevator.
  • An elastic element 42 preferably consisting of a helical spring, is secured to one of the levers 13" on the safety brake fixing side and its function is to bring the lever 13" back to the central position (i.e. to the horizontal or rest position) whenever the device 12 stops operating.
  • this shows a safety device according to the invention, indicated by the reference numeral 10' as a whole, according to a different mounting mode and, more specifically, in correspondence with the lower part of the elevator car frame.
  • the electric actuator 26 is energized and consequently, as described above, the slider or pin 22 is in the first position (i.e. in the position whereby it is retracted with respect to the end of the tubular element 16').
  • the electric actuator 26 Upon reaching the level of the floor, the electric actuator 26 deenergizes and, consequently, the slider or pin 22 gets out with respect to the end of the tubular element 16' and its end 22' engages the through opening 41 of the metal plate 40.
  • the slider or pin 22 slides along the through opening 41 (said opening is of a slotted type) and, upon reaching the end of the opening (one of the two ends of the slot) the guide means 16 will start rotating upwards with respect to the hinge means 20 and, considering that the connection means 30 connects the guide means 16 to the safety brake 13 via the contact plate 31 and the further contact plate 31', the safety brake 13 will be operated, whereby the elevator car is firmly blocked with respect to the guide elements thereby firmly holding it.
  • the function of the shock absorbing element is that of absorbing the shocks resulting from the movement of the two connection plates whenever the safety brake is activated and, substantially, it accompanies the braking action.
  • the operation of the device is fully similar should the uncontrolled movement be directed upwards, in that the safety brake 13 is a bidirectional one.
  • the position of the slider or pin 22, i.e. whether the slider or pin is in the first or in the second position, is controlled by the microswitches 28 and 29 in order to inhibit the operation of the elevator or not.
  • the safety device for stopping an uncontrolled movement away of an elevator car can be advantageously secured to the elevator car frame, in a simple manner, so as to make test, maintenance, and/or replacement/repair operations, in the presence of faults, easy and quick to perform.
  • the device according to the invention comprises and integrates both the uncontrolled movement detection means and the safety brake in one structure, said structure being easily connectable to the structure of the elevator car frame both in the upper part and in the lower part of said elevator car frame, and this allows to secure said device also to elevators installed before the year 1999 without requiring onerous works for the operators in charge and without a possible complete replacement of the elevator car frame.
  • a further advantage of the device according to the invention is related to the fact that it is secured to the elevator car frame and, consequently, it moves integrally therewith and at the same speed and does not depend on the operation of any other electronic and/or mechanical components not fixed to the elevator car frame; thanks to this circumstance, it is not necessary to declare the time delay within which the movement shall be detected, time delay to which one should add the time within which the electric devices in charge of operating the brake and the remaining elevator car stopping devices are operated.
  • this advantage makes it possible for a device according to the invention to comply with the regulations that specify that an elevator car shall stop within a space not exceeding 1,2 meters from the level of the floor at which the uncontrolled movement of the elevator car has been detected.
  • a further advantage of the device according to the invention is in that it operates directly onto the safety brake without requiring the presence of movement detection systems or devices and, consequently, it is fully independent of the elevator control panel.

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

Claims (8)

  1. Dispositif de sécurité (10, 10') permettant d'arrêter un mouvement incontrôlé loin d'une cabine d'ascenseur, comprenant, dans un dispositif, un moyen d'actionnement (12) et un frein de sécurité (13) de type bidirectionnel reliés l'un à l'autre et pouvant être fixés à la structure d'un châssis de cabine d'ascenseur, la connexion entre ledit moyen d'actionnement (12) et ledit frein de sécurité (13) se faisant au moyen d'une connexion (30) qui comprend une plaque de contact (31) et une autre plaque de contact (31') parallèles l'une à l'autre et un élément d'absorption des chocs pour ladite plaque de contact (31) et ladite autre plaque de contact (31'), caractérisé en ce que les moyens d'actionnement (12) comprennent un moyen de guidage (16) comprenant un tube métallique (16') à l'intérieur duquel est disposé une glissière ou une broche (22) dont une extrémité (22') fait saillie par rapport au tube (16') sur une longueur et comprenant une paire de microinterrupteurs (28, 29) appropriés pour détecter la position de la glissière ou de la broche (22) dans les première et seconde positions, ledit tube métallique (16') comprenant, en correspondance avec une extrémité opposée à celle à partir de laquelle l'extrémité (22') de la glissière ou de la broche (22) fait saillie, un manchon coaxial (24) destiné à se connecter à un moyen comprenant un actionneur électrique (26) adapté pour déplacer la glissière ou la broche (22) entre une première position dans laquelle la glissière ou la broche (22) est rétractée par rapport au tube métallique (16') et une deuxième position dans laquelle la glissière ou la broche (22) est dans une position étendue par rapport à l'élément tubulaire (16'), le dispositif de sécurité comprenant en outre une plaque métallique (40) pouvant être fixée à un guide ou montant (15) ou à une paroi d'un puits à l'intérieur duquel la cabine d'ascenseur se déplace et ladite plaque métallique (40) comprenant une ouverture traversante (41) de type fendu pour recevoir tout arrêt imprécis ou mouvement de remise à niveau, ladite ouverture étant appropriée pour être engagée par l'extrémité (22') de la broche ou de la glissière (22) chaque fois que ladite broche ou glissière est dans la deuxième position, la partie d'extrémité (22') de la broche ou de la glissière étant étendue par rapport au tube (16').
  2. Dispositif de sécurité selon la revendication 1, caractérisé en ce qu'il peut être fixé au châssis de la cabine d'ascenseur en correspondance avec la partie supérieure ou la partie inférieure du châssis de la cabine d'ascenseur.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'il peut être fixé au châssis de la cabine d'ascenseur au moyen de blocs ou de supports de fixation (14).
  4. Dispositif selon la revendication 1, caractérisé en ce que, l'actionneur électrique (26) est un actionneur électromagnétique.
  5. Dispositif selon la revendication 3, caractérisé en ce que le moyen de guidage (16) est fixé à l'un des blocs ou supports de fixation (14) au moyen d'un élément de support (18), ledit moyen de guidage (16) étant relié à l'élément de support (18) au moyen d'une charnière (20) présentant un axe de rotation horizontal approprié pour permettre audit moyen de guidage (16) d'osciller dans un plan vertical.
  6. Dispositif selon les revendications 1 à 3, caractérisé en ce que le frein de sécurité (13) est fixé à l'un des blocs ou supports de fixation (14) et comprend un corps (13'), des leviers d'actionnement opposés et parallèles (13") fixés aux deux blocs ou supports de fixation (14), et un arbre de synchronisation (13"').
  7. Dispositif selon la revendication 6, caractérisé en ce que l'autre plaque de contact (31') est fixée à l'un des leviers (13") par des vis (31") ou des éléments de rétention équivalents.
  8. Dispositif selon la revendication 1, caractérisé en ce que l'élément d'absorption des chocs comprend un premier élément élastique (32), un deuxième élément élastique (32') et une broche de connexion (32"), le premier élément élastique (32) étant disposé entre la plaque de contact (31) et l'autre plaque de contact (31'), et le deuxième élément élastique (32') étant disposé de façon à être en contact avec l'autre plaque de contact (31') sur un côté opposé par rapport à la plaque de contact (31), la broche de connexion (32") étant insérée de manière coaxiale auxdits premier et deuxième éléments élastiques de manière à les maintenir alignés.
EP18171524.4A 2017-05-12 2018-05-09 Dispositif de sécurité pour arrêter un mouvement non contrôlé d'une cabine d'ascenseur Active EP3421406B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102017000051961A IT201700051961A1 (it) 2017-05-12 2017-05-12 Dispositivo di sicurezza per l'arresto di un movimento di allontanamento incontrollato di una cabina di ascensore

Publications (2)

Publication Number Publication Date
EP3421406A1 EP3421406A1 (fr) 2019-01-02
EP3421406B1 true EP3421406B1 (fr) 2021-11-03

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ID=60020340

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Application Number Title Priority Date Filing Date
EP18171524.4A Active EP3421406B1 (fr) 2017-05-12 2018-05-09 Dispositif de sécurité pour arrêter un mouvement non contrôlé d'une cabine d'ascenseur

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EP (1) EP3421406B1 (fr)
IT (1) IT201700051961A1 (fr)
MA (1) MA46250A (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008149413A1 (fr) * 2007-06-04 2008-12-11 Mitsubishi Electric Corporation Dispositif de sécurité d'élévateur
DE102011001449A1 (de) * 2011-03-21 2012-09-27 K-Solutions Gmbh Sicherheitsfangvorrichtung für eine Aufzugsanlage sowie Verfahren zur Sicherung einer schienengeführten Aufzugskabine einer Aufzugsanlage
ITMI20120384A1 (it) * 2012-03-12 2013-09-13 Paolo Frigerio Dispositivo per arrestare il movimento di allontanamento incontrollato della cabina di un ascensore da un piano
CN103420247B (zh) * 2013-08-21 2015-07-29 上海微频莱机电科技有限公司 关于电梯轿厢意外移动的安全装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
IT201700051961A1 (it) 2018-11-12
EP3421406A1 (fr) 2019-01-02
MA46250A (fr) 2019-07-24

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