EP3421406A1 - 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
EP3421406A1
EP3421406A1 EP18171524.4A EP18171524A EP3421406A1 EP 3421406 A1 EP3421406 A1 EP 3421406A1 EP 18171524 A EP18171524 A EP 18171524A EP 3421406 A1 EP3421406 A1 EP 3421406A1
Authority
EP
European Patent Office
Prior art keywords
elevator car
pin
cursor
contact plate
secured
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.)
Granted
Application number
EP18171524.4A
Other languages
German (de)
English (en)
Other versions
EP3421406B1 (fr
Inventor
Paolo Frigerio
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Individual
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Individual
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Publication date
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Publication of EP3421406A1 publication Critical patent/EP3421406A1/fr
Application granted granted Critical
Publication of EP3421406B1 publication Critical patent/EP3421406B1/fr
Active legal-status Critical Current
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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.
  • An object of the present invention is to obviate the above-mentioned drawbacks.
  • an object of the present invention is to provide such safety device for stopping an uncontrolled movement away of an elevator car as to be easily secured to the elevator car frame, so as to make the test, maintenance and/or replacement/repair operations, in the case of faults, easy and quick to perform.
  • a further object of the present invention is to provide a safety device that does not necessarily require the presence of movement detection systems or devices and consequently is fully independent of the elevator control panel.
  • a further object of the present invention is to provide a safety device that can be easily installed even on types of elevators manufactured before the year 1999.
  • a further object of the present invention is to provide a safety device that is compact in size and space occupation.
  • a further object of the present invention is to put at users' disposal a safety device for stopping an uncontrolled movement away of an elevator car suitable for guaranteeing a high value of strength and reliability over time and also such as to be implemented in an easy and cost-effective manner.
  • 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 cursor or pin 22 Inside the metal pipe 16' and coaxially thereto there is arranged a cursor 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 cursor 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 cursor 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 cursor 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 cursor 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 cursor 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 cursor 22 can engage whenever said pin or cursor 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 cursor 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 cursor 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 cursor 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 cursor or pin 22, i.e. whether the cursor 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
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 true EP3421406A1 (fr) 2019-01-02
EP3421406B1 EP3421406B1 (fr) 2021-11-03

Family

ID=60020340

Family Applications (1)

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

Country Status (3)

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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2154096A1 (fr) * 2007-06-04 2010-02-17 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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2154096A1 (fr) * 2007-06-04 2010-02-17 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

Also Published As

Publication number Publication date
IT201700051961A1 (it) 2018-11-12
MA46250A (fr) 2019-07-24
EP3421406B1 (fr) 2021-11-03

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