EP3789335B1 - Elektromechanische fangvorrichtung für aufzugsvorrichtung - Google Patents

Elektromechanische fangvorrichtung für aufzugsvorrichtung Download PDF

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Publication number
EP3789335B1
EP3789335B1 EP20382790.2A EP20382790A EP3789335B1 EP 3789335 B1 EP3789335 B1 EP 3789335B1 EP 20382790 A EP20382790 A EP 20382790A EP 3789335 B1 EP3789335 B1 EP 3789335B1
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EP
European Patent Office
Prior art keywords
guide
activation
safety gear
gear device
guiding
Prior art date
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EP20382790.2A
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English (en)
French (fr)
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EP3789335A3 (de
EP3789335A2 (de
Inventor
Raúl ALONSO RAMILA
Oier GARCIA ZALACAIN
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Orona S Coop
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Orona S Coop
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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
    • 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
    • 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

Definitions

  • the present invention is comprised in the technical field of safety devices for elevators, more specifically in the field of braking devices acting between cars or counterweights and guiding surfaces, and relates particularly to an electromechanically-actuated safety gear device for elevator apparatus.
  • Safety elements commonly used in elevator apparatus include, among others, emergency braking devices which are used for reducing the speed of movement of an elevator car until it comes to a halt in cases in which the elevator car reaches excessively high speeds, which may occur due to defects in brake control or actuation, or to cable breaking and disconnecting, for example.
  • safety gears prevent the free fall or uncontrolled movement of the car by means of the immobilization thereof on guides along which the car moves. Therefore, a safety gear, also sometimes known as engagement, is in charge of stopping the car by means of a force of friction it causes when acting on the guides of the car, and must be capable of stopping said car at full capacity, keeping it secured on the guides.
  • safety gears are activated by means of a mechanical-type speed limiting element which, in the case of excessive car speed, is locked and causes the activation of said safety gears.
  • safety electronics in the technical field of elevator safety systems is on the rise, and these electronic safety systems can be classified into active-type systems which require power supply for the positive actuation of the safety mechanism, and passive-type systems which require power supply for keeping the safety system in an operative restraining state.
  • passive safety elements offer an increased functionality, they have the significant drawback of requiring continuous power supply for restraining same, with the increase in energy expenditure that this entails, thereby increasing the operative costs of the apparatus and negatively affecting its energy rating.
  • said passive elements typically have components of very large dimensions due to the high power requirements during operation, adversely affecting the overall size, weight, and efficiency of the apparatus.
  • a first example can be found in European patent with publication number EP1813566 relating to a safety device for an elevator capable of reducing the time period required for stoppage after detection of a speed abnormality.
  • the device comprises a speed limiter activating engagement when a speed abnormality is detected, a rail that moves away from the guide in the downward direction, and a braking element including an attraction element or magnet.
  • the limiter detects an abnormality, the magnet is attracted to the guide by the limiter, causing the braking element to stop moving downward and to move upward along the rail to cause engagement.
  • Another European patent in this case with publication number EP1902993 , describes a braking or arresting device for an elevator car guided in a shaft along guide rails, wherein a roller is the braking element placed between the guide and the block for immobilizing the car. This roller is kept such that it is spaced from the guide as a result of an electromagnet. Furthermore, there is a guiding element which, in the active position, puts the roller in contact with the guide so as to cause engagement, whereas in the non-active position, the electromagnet keeps the guiding element stowed away.
  • patent with publication number EP2651810 discloses a device for actuating and resetting a safety gear of an elevator installation that can be fitted on a braking surface or a guide rail.
  • the device includes a pressure accumulator, preferably a compression spring, an actuator, a restraining device, and a remotely actuable resetting device configured for tensing the pressure accumulator in a standby position.
  • the actuator can be attached to the safety gear element and is attached to the pressure accumulator, and the actuator is configured for, on one hand, keeping the safety gear element in the standby position, and on the other hand, if necessary, moving it to an engaged position upon releasing the pressure accumulator.
  • the restraining device includes a restraining latch held by means of an electromagnet and released by means of a spring force, this latch being configured for keeping the actuator in the standby position.
  • US 2012/152663 A1 also discloses an electromechanical safety gear device for elevator apparatus according to the state of the art.
  • safety gears for elevator apparatus are activated by means of a mechanical speed limiting element which, when an excessive speed of movement of the car with respect to the guides is detected, is locked and causes the activation of said safety gears.
  • Designs prepared for working without this mechanical speed limiting element, using for said function secure electronic systems for detecting emergency situations, are now emerging. This leads to need to use a safety gear that can be electronically activated.
  • the object of the invention consists of an electromechanically-actuated safety gear device for elevator apparatus comprising an engagement block integral with a car and in proximity with a guide of the elevator. There is arranged on one side of the guide a braking shoe of the car secured to the block, whereas on the other side of the guide of the elevator there is a roller for engagement thereof between the block and the shoe, retaining in this engagement movement the guide located between the roller and the shoe and thereby securing the car against the guide.
  • the device comprises an actuating and resetting mechanism comprising, among other elements:
  • the device is based mainly on the pivoting-type movement of the activation plate with respect to the engagement block, although linear-type movements are likewise contemplated.
  • the electromagnetic activation mechanism is powered, causing the activation plate to be kept spaced from the guide.
  • the block would start to move horizontally with respect to the guide, until the shoe touches the guide and then compresses springs attached to the shoe.
  • the horseshoe has a projection which, when hitting against the stops, would push the activation plate, moving it away from the guide and closer to the electromagnet, such that furthermore the magnetic element no longer contact the guide. Therefore, prior to disengaging the apparatus, the electromagnet would again be powered, causing the safety gear to return to the standby position when the roller moves downward as a result of a tension spring pulling the roller to said position.
  • the described electromechanical safety gear device for elevator apparatus is conceived to perform emergency braking of a car longitudinally movable along at least one essentially vertical guide (1), securing the car on said guide (1) so as to prevent uncontrolled movements or even fall due to the action of gravity.
  • this safety gear schematically shown in its standby position in Figure 1 is basically formed by:
  • the engagement block in turn comprises a central rail for housing the guide (1), a side arresting element (5) movable perpendicular to the central rail, and a side braking element (6) movable perpendicular to the central rail in a direction opposite that of the arresting element (5) and coupleable both to the arresting element (5) and to the guide (1) for braking and immobilizing the car.
  • the arresting element (5) consists of a shoe
  • the braking element (6) consists of a roller provided with a central shaft (7) and a toothed surface of friction.
  • the activation plate (2) which in this preferred embodiment has an elongated geometry and moves in a pivoting manner with respect to the guide (1), has a first end comprising a pivoting articulation (8) with the engagement block for creating a pivoting movement of the activation plate (2) with respect of the guide (1), and a second end comprising a compression spring (9) for moving the activation plate (2) closer to the guide (1).
  • the guiding mechanism (3) of said activation plate (2) in turn comprises a longitudinal through groove (10) located in a central sector of the activation plate (2), and stops (11) located at respective ends of the longitudinal groove (10).
  • the activation plate (2) additionally comprises a movable friction element (12), which in this preferred embodiment consists of a pivoting cam body located at the second end, as can be seen in the attached drawings.
  • This friction element (12) is kept in a normally horizontal position, perpendicular to the guide (1), as a result of the action of an inner spring (13).
  • the guiding element (4) is in the form of a horseshoe-shaped body, as illustrated in Figures 1-6 , and comprises a central housing (14), demarcated by respective upper and lower arms (15) of the horseshoe-shaped body, such that the housing (14) allows insertion of the central shaft (7) of the braking element (6). Furthermore, the guiding element (4) comprises at least one contact surface (16) intended for contacting the guide (1).
  • This guiding element (4) additionally comprises a magnetic element (17) for creating an additional magnetic coupling with the guide (1).
  • the contact surface (16) is located at a free end of the magnetic element (17), although in alternative embodiments, it can be located in other parts of the guiding element (4), such as the free ends of the arms (15), for example.
  • the aforementioned housing (14) allows a sliding longitudinal movement of the braking element (6) to occur therein.
  • the activation mechanism comprises at least one electromagnetic element (18), in this case an electromagnetic suction pad, linked to the pivoting articulation (8) for keeping the activation plate (2) in a position spaced from the guide (1), and an elastic element (19) linking the guiding element (4) with the activation plate (2).
  • the aforementioned compression spring (9) therefore moves the activation plate (2) closer to the guide (1) when the electromagnetic element (18) is not powered.
  • Figures 2-6 illustrate an operating sequence of the device described above. In this sense, while the device is in a standby position in Figure 1 , with the car moving normally along the guide (1) and the electromagnetic element (18) is powered and keeps the activation plate (2) spaced from said guide (1), in Figure 2 the elevator is in a standby position, waiting to be used, such that it does not have to be powered, thereby reducing its power consumption.
  • the braking element (6) moves horizontally through the housing (14) towards the guide (1) until contacting the arresting element (5), which additionally comprises reinforcement springs (20) for controlling the braking force.

Landscapes

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

Claims (11)

  1. Elektromechanische Fangvorrichtung für eine Aufzugsvorrichtung, die zur Notbremsung einer longitudinal entlang einer Führung (1) bewegbaren Kabine elektronisch aktiviert werden kann, wobei die Vorrichtung aufweist:
    - einen Eingriffsblock, der einstückig mit der Kabine ausgebildet ist und wiederum aufweist:
    - eine mittlere Schiene zur Aufnahme der Führung (1),
    - ein Seitenarretierungselement (5), das senkrecht zu einer Seite der mittleren Schiene bewegbar ist, und
    - ein Bremselement (6), das in Bezug auf die mittlere Schiene bewegbar ist und mit der Führung (1) zum Bremsen und Einrasten der Kabine koppelbar ist,
    wobei die Vorrichtung ferner aufweist:
    - einen Aktivierungsmechanismus, der elektronisch betätigt werden kann,
    - eine Aktivierungsplatte (2), die in Bezug auf die Führung (1) bewegbar ist und durch den Aktivierungsmechanismus betätigbar ist, und die wiederum einen Führungsmechanismus (3) aufweist, und
    - ein Führungselement (4) des Bremselements (6), das mit dem Führungsmechanismus (3) koppelbar ist und durch den Führungsmechanismus (3) in eine Richtung im Wesentlichen parallel zu der Führung (1) bewegbar ist,
    wobei die Vorrichtung dadurch gekennzeichnet ist, dass die Aktivierungsplatte (2) zusätzlich ein bewegbares Reibungselement (12) aufweist, um relative Positionen der Aktivierungsplatte (2) in Bezug auf die Führung (1) zu definieren:
    - eine Standby-Position, in welcher der Aktivierungsmechanismus die Aktivierungsplatte (2) von der Führung (1) beabstandet hält,
    - eine aktive Position, in welcher der Aktivierungsmechanismus die Aktivierungsplatte (2) zu der Führung (1) bewegt, um das Reibungselement (12) mit der Führung (1) zu berühren, und
    - eine Bremsposition, in der eine relative Bewegung der Führung (1) in Bezug auf die Kabine eine Bewegung des Reibungselements (12) verursacht, was wiederum zu der folgenden Betätigungsreihenfolge führt:
    - das Führungselement (4) kontaktiert die Führung (1),
    - das Führungselement (4) bewegt sich aufgrund einer Reibung mit der Führung (1) entlang dem Führungsmechanismus (3), und
    - das Bremselement (6) wird bis zum Eingriff mit dem Arretierungselement (5) von dem Führungselement (4) angetrieben.
  2. Fangvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sich das Reibungselement (12) in Bezug auf die Aktivierungsplatte (2) schwenkend bewegt.
  3. Fangvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Führungselement (4) aufweist:
    - ein Gehäuse (14) zum Koppeln des Bremselements (6), und
    - mindestens eine Kontaktfläche (16), die dazu vorgesehen ist, die Führung (1) zu berühren.
  4. Fangvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass sich die Aktivierungsplatte (2) in Bezug auf die Führung (1) schwenkend bewegt und aufweist:
    - ein Schwenkscharnier (8) für die Schwenkbewegung der Aktivierungsplatte (2) in Bezug auf die Führung (1), und
    - eine Druckfeder (9), um die Aktivierungsplatte (2) näher an die Führung (1) zu bewegen.
  5. Fangvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Führungsmechanismus (3) aufweist:
    - eine Längsdurchgangsnut (10), und
    - Anschläge (11), die sich an jeweiligen Enden der Längsnut (10) befinden.
  6. Fangvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass das Führungselement (4) einen Vorsprung aufweist, der mit den Anschlägen (11) des Führungsmechanismus (3) koppelbar ist, um die Aktivierungsplatte (2) näher an den Aktivierungsmechanismus zu bewegen.
  7. Fangvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Aktivierungsmechanismus ein elektromagnetisches Element (18) aufweist, das mit dem Schwenkscharnier (8) verbunden ist, um die Aktivierungsplatte (2) in einer von der Führung (1) beabstandeten Position zu halten.
  8. Fangvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Bremselement (6) eine Rolle ist und das Arretierungselement (5) eine Backe ist.
  9. Fangvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Führungselement (4) ein Magnetelement (17) zum zusätzlichen magnetischen Koppeln mit der Führung (1) ist.
  10. Fangvorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass sich die Kontaktfläche (16) in dem Magnetelement (17) befindet.
  11. Aufzugsvorrichtung, dadurch gekennzeichnet, dass diese die elektromechanische Fangvorrichtung nach einem der Ansprüche 1 bis 10 aufweist.
EP20382790.2A 2019-09-06 2020-09-07 Elektromechanische fangvorrichtung für aufzugsvorrichtung Active EP3789335B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201930777A ES2821007B2 (es) 2019-09-06 2019-09-06 Dispositivo paracaídas electromecánico de aparatos elevadores

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EP3789335A2 EP3789335A2 (de) 2021-03-10
EP3789335A3 EP3789335A3 (de) 2021-03-17
EP3789335B1 true EP3789335B1 (de) 2022-07-13

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ES (2) ES2821007B2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11975945B1 (en) 2022-11-28 2024-05-07 Otis Elevator Company Frictionless safety brake actuator

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EP4061757B1 (de) * 2019-11-21 2023-10-25 Inventio Ag Einfach rückstellbare elektronische fangvorrichtung
CN113479738B (zh) * 2021-07-26 2022-10-04 日立电梯（中国）有限公司 一种自适应相对恒定制动力装置
CN113928951B (zh) * 2021-10-11 2023-02-07 浙江蒂尔森电梯有限公司 一种安全防滑型电梯轿厢结构

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JP4672656B2 (ja) 2004-11-16 2011-04-20 三菱電機株式会社 エレベータの安全装置
BRPI0601926B1 (pt) * 2005-06-17 2018-06-12 Inventio Aktiengesellschaft Dispositivo de pára-quedas do freio
EP1783086B1 (de) * 2005-11-08 2014-03-19 Dynatech, Dynamics & Technology, S. L. Graduale bidirektionale Fangvorrichtung für Aufzüge
DE102006043890A1 (de) * 2006-09-19 2008-03-27 Wittur Ag Selbstrückstellmechanismus für eine Bremsfangeinrichtung Typ BSG
MY143851A (en) * 2006-12-05 2011-07-15 Inventio Ag Braking device for holding and braking a lift cabin in a lift facility
KR100968706B1 (ko) * 2009-04-08 2010-07-06 오티스 엘리베이터 컴파니 엘리베이터 카 안전장치용 마찰부재 및 이 마찰부재를 갖는 엘리베이터 카의 안전장치
KR20140042769A (ko) 2010-12-17 2014-04-07 인벤티오 아게 비상정지장치를 구동시키고 리셋시키기 위한 장치
US9169104B2 (en) * 2010-12-17 2015-10-27 Inventio Ag Activating a safety gear
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Publication number Priority date Publication date Assignee Title
US11975945B1 (en) 2022-11-28 2024-05-07 Otis Elevator Company Frictionless safety brake actuator

Also Published As

Publication number Publication date
EP3789335A3 (de) 2021-03-17
ES2821007B2 (es) 2022-02-21
EP3789335A2 (de) 2021-03-10
ES2821007A1 (es) 2021-04-23
ES2928390T3 (es) 2022-11-17

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