EP3929132A1 - Sicherheitsbremse für aufzug, hebevorrichtung mit sicherheitsbremse und verfahren zum bremsen einer hebevorrichtung durch besagte sicherheitsbremse - Google Patents

Sicherheitsbremse für aufzug, hebevorrichtung mit sicherheitsbremse und verfahren zum bremsen einer hebevorrichtung durch besagte sicherheitsbremse Download PDF

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Publication number
EP3929132A1
EP3929132A1 EP21382552.4A EP21382552A EP3929132A1 EP 3929132 A1 EP3929132 A1 EP 3929132A1 EP 21382552 A EP21382552 A EP 21382552A EP 3929132 A1 EP3929132 A1 EP 3929132A1
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EP
European Patent Office
Prior art keywords
braking
elevator
activation
safety brake
force
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.)
Pending
Application number
EP21382552.4A
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English (en)
French (fr)
Inventor
Raúl ALONSO RÁMILA
Oier GARCIA ZALACAIN
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.)
Orona S Coop
Original Assignee
Orona S Coop
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 Orona S Coop filed Critical Orona S Coop
Publication of EP3929132A1 publication Critical patent/EP3929132A1/de
Pending 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
    • 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 belongs to the field of elevators, and more specifically to safety devices for elevators that act between the car and the elevator guiding elements, exerting friction braking.
  • the object of the present invention is a safety brake for an elevator, a lifting device comprising the safety brake, and a method of braking a lifting device by means of said safety brake.
  • these safety systems consist of braking devices used to brake an elevator car, for those cases in which it reaches high speeds, which may occur, for example, due to defects in the control or actuation of its brake, due to breaks and sags in the cable, etc.
  • Emergency braking devices are also used to prevent uncontrolled movements of the car, such as slow sliding out of the stop position. They can also be activated to lock the car in a certain position, such as, for example, for the temporary protection of the safety space during the performance of inspection or maintenance tasks of the elevator by qualified technical personnel.
  • the actuator installed in the elevator car, which, tied to the chassis of the traveling assembly, is in charge of braking said traveling assembly in an emergency situation.
  • the parachute has the functions of allowing a safe operation of the elevator in the event of any risk event detected by the positioning system, having to guarantee a braking of the elevator, as a conventional wedging.
  • passive security systems offer an increase in functionality, they present the great disadvantage of needing a continuous power supply to be operational, with the increase in energy expenditure that this implies, thus increasing the operating costs of the machine.
  • these passive systems generally have larger components due to the high power requirements during operation, which negatively affects the overall size, weight and efficiency of the machine.
  • the safety chain opens, the locking mechanism releases the first element and it moves to its second position, pushing the second element with it, which in turn drags the braking element.
  • the reset mechanism acts on the first element and returns it to its first position. In this way, the locking mechanism can reretain said first element.
  • the invention refers to a safety brake for an elevator, the elevator having a movable car through a vertical guide.
  • the safety brake comprises a wedging block that can be coupled to the elevator car; a shoe attached to the wedge block; a braking element with two positions, an initial rest position and an active position, wherein said braking element is located between the wedging block and the vertical guide, such that when an emergency situation occurs said braking element simultaneously contacts the wedging block and the vertical guide in their active position, causing a safety braking of the elevator; an electrically powered activation element for activating and deactivating the safety brake.
  • the safety brake of the invention comprises a first element located in a lower position with respect to the braking element, said first element being vertically movable with respect to the wedging block, wherein the first element has two positions, a first rest position and a second active position, wherein in the event of a power failure of the activation element, a vertical movement of the first element to its second active position occurs, pushing and in turn moving the braking element from its initial rest position to its active position.
  • said active position of the braking element it reaches a point such that autonomous emergency braking is ensured, that is to say, from this point on it is no longer necessary to push the braking element further by means of the first element.
  • the safety brake described herein also comprises a second element located in a higher position with respect to the braking element, wherein the second element has two positions, a first rest position and a second active position, wherein said second element is movable vertically with respect to the wedging block, such that in the second active position of the second element and the first element in its second active position, the activating element simultaneously contacts the first element and the second element, leaving the vertical guide trapped between the braking element and the shoe, generating a maximum braking force of the elevator.
  • a resettable electronic activation parachute is provided in a simple and effective way under the condition of wedging, being a reliable and robust solution, as well as simple and involving low energy consumption.
  • both the first element and the second element are movable only in the vertical direction.
  • the activation element is integrally attached to the first element, such that both elements are in physical contact at all times, regardless of the rest or active position in which the first element and the second element are
  • the activation element is integrally attached to the second element, such that in the first rest position the first element is in physical contact with the activation element, and wherein in the event of a power failure of the activation element, the contact between both elements, activation element and first element, is lost.
  • this integral connection between the activation element and the second element includes an elastic element with compression capacity, said elastic element allowing absorbing the existing deformations between the first element and the activation element.
  • a lifting device comprising the elevator safety brake, described above, will be described below.
  • a braking method of a lifting device is described, by means of the safety brake described above. This method will be described later in detail with reference to the figures, to facilitate their follow-up and understanding by the reader.
  • FIG. 1 shows the safety brake (1) of the invention according to a possible preferred embodiment.
  • this safety brake (1) is applicable to all types of elevators equipped with electronic means for activating the parachute, without the need to include any speed limiter, with the elevators having a car movable through a vertical guide (2), said vertical guide (2) being housed in a central rail (11), as shown in figure 1 .
  • the safety brake (1) comprises:
  • first element (20) With respect to the first element (20), it has two positions, a first rest position, shown in Figures 1 and 4A , and a second active position, shown in Figure 4B , wherein in the event of a power failure of the activation element (14) there occurs a vertical movement of the first element (20) to its second active position, pushing and moving the braking element (13) from its initial rest position to its active position in which the actuation of said braking element (13) becomes autonomous, that is, from this point on it is no longer necessary to continue pushing the braking element (13) by means of the first element (20).
  • the second element (30) For its part, with respect to the second element (30), it also has two positions, a first rest position, shown in figure 4A , and a second active position, shown in figure 4D , wherein said second element (30) is vertically movable with respect to the wedging block (10), such that in its second active position and the first element (20) being in its second active position, the activation element (14) simultaneously contacts the first element (20) and the second element (30), in the preferred embodiment of figure 4D through the intermediate elastic element (15). In this way, as can be seen in figure 4D , the vertical guide (2) is trapped between the braking element (13) and the shoe (12), generating a maximum braking force for the elevator.
  • the activation element (14) is integrally connected to the second element (30), such that in the first rest position the first element (20) is in physical contact with the activation element (14), and where in the event of a power failure of the activation element (14), the contact between both elements, the activation element (14) and the first element (20), is lost, as shown in Figures 4A and 4B .
  • This special arrangement is not trivial or random, but allows a well-identified double objective to be obtained:
  • the activation element (14) in the rest position of the first element (20), the activation element (14) is configured to exert a force of attraction between the first element (20) and the second element (30), wherein said force of attraction is greater than the force exerted by the first compression springs (16). This allows the activation element (14) to remain in contact with the first element (20) during the rest position of the first element (20), the normal operating state of the elevator.
  • the first element (20) is a metal sheet in an "L" configuration, such that it has a lower horizontal base (21) in contact with the activation element (14) in the rest position.
  • This particularity of the first element (20) makes it possible to obtain a double functionality through a single piece, since at the same time that said first element (20) pushes the braking element (13), it is also possible to keep the latter in its position with respect to the activation element (14).
  • this preferred embodiment of the first element (20) also has the advantage of being cheap and simple to manufacture.
  • the second element (30) is a metal sheet that has at least two folded sections, a vertical lateral surface (31) and a horizontal lower surface (32) preferably located in contact with the elastic element (15), as shown in figure 2 . More particularly, in figure 3 it is observed that the vertical lateral surface (31) has screws (33) for guiding and moving the second element (30) through vertical grooves (34). Therefore, by means of this particular embodiment of the second element (30) it is possible to obtain an increase in functionalities from a single manufactured part.
  • the safety brake (1) of the invention may additionally have vertical pins (17), located inside the first compression springs (16) as shown in Figures 1 and 4B for guiding said springs (16), the pins (17) being fixed below the lower horizontal surface (32) of the second element (30), traversing the lower horizontal base (21) of the first element (20).
  • the safety brake (1) described herein may have an internal stop (19), preferably made of brass, to limit the movement of the braking element (13), as depicted in Figures 1 and 4D .
  • the method comprises at least the following steps:
  • step d it is intended to indicate that when the expression "a point such that autonomous emergency braking is ensured" is mentioned in step d), it refers to a point of movement of the braking element such that it is guaranteed that emergency braking will take place, independently of external actions, without requiring any additional thrust from the braking element.
  • step e) of the method it is referring to the vertical movement suffered by the latter as a consequence of the thrust movement made by the first element (20) on said braking element (13).
  • the first compression springs (16) exert a force on the first element (20), said compression springs (16) remaining in a compressed position, such that the force of attraction exerted by the activation element (14) between the first element (20) and the second element (30) is greater than the force exerted by the first compression springs (16) on the first element (20), remaining in contact the three elements (14, 20, 30).
  • step b) the first element (20) moves upwards to a maximum point where its lower horizontal base (21) contacts the wedging block (10), as shown in Figures 3 and 4B .
  • step d) the braking element (13) moves along a groove (18) made on a guide plate of the wedging block (10), as shown in Figures 4A, 4B, 4C .
  • the method also comprises the following steps:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP21382552.4A 2020-06-23 2021-06-23 Sicherheitsbremse für aufzug, hebevorrichtung mit sicherheitsbremse und verfahren zum bremsen einer hebevorrichtung durch besagte sicherheitsbremse Pending EP3929132A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES202030628A ES2887940B2 (es) 2020-06-23 2020-06-23 Freno de seguridad para ascensor, aparato elevador que comprende el freno de seguridad, y procedimiento de frenada de un aparato elevador mediante dicho freno de seguridad

Publications (1)

Publication Number Publication Date
EP3929132A1 true EP3929132A1 (de) 2021-12-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21382552.4A Pending EP3929132A1 (de) 2020-06-23 2021-06-23 Sicherheitsbremse für aufzug, hebevorrichtung mit sicherheitsbremse und verfahren zum bremsen einer hebevorrichtung durch besagte sicherheitsbremse

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EP (1) EP3929132A1 (de)
ES (1) ES2887940B2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4177207A1 (de) * 2021-11-04 2023-05-10 Otis Elevator Company Reibungsfreier elektronischer sicherheitsaktuator
WO2023187231A1 (es) * 2022-05-26 2023-10-05 Dynatech, Dynamics & Technology, S.L. Sistema de activación electromecánico compacto para paracaidas de un ascensor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070051563A1 (en) * 2003-10-07 2007-03-08 Jae-Hyuk Oh Remotely resettable ropeless emergency stopping device for an elevator
EP1902993A1 (de) * 2006-09-19 2008-03-26 Wittur AG Selbstrückstellmechanismus für eine Bremsfangeinrichtung Typ BSG
US20160289045A1 (en) * 2013-11-15 2016-10-06 Inventio Ag Safety brake for an elevator
WO2017098299A1 (en) 2015-12-07 2017-06-15 Otis Elevator Company Robust electrical safety actuation module
EP2408701B1 (de) 2009-03-16 2018-05-30 Otis Elevator Company System zum schutz eines aufzugs vor zu starker beschleunigung und zu hoher geschwindigkeit
EP2490971B1 (de) 2009-10-21 2018-08-22 Kone Corporation Steuergerät fur unbeabsichtigte bewegung und aufzug

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2703351T3 (es) * 2014-06-12 2019-03-08 Otis Elevator Co Mecanismo de reinicio de sistema de frenado para una estructura elevada
CN107473049B (zh) * 2017-09-11 2023-03-17 恒达富士电梯有限公司 一种电梯安全钳装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070051563A1 (en) * 2003-10-07 2007-03-08 Jae-Hyuk Oh Remotely resettable ropeless emergency stopping device for an elevator
EP1902993A1 (de) * 2006-09-19 2008-03-26 Wittur AG Selbstrückstellmechanismus für eine Bremsfangeinrichtung Typ BSG
EP2408701B1 (de) 2009-03-16 2018-05-30 Otis Elevator Company System zum schutz eines aufzugs vor zu starker beschleunigung und zu hoher geschwindigkeit
EP2490971B1 (de) 2009-10-21 2018-08-22 Kone Corporation Steuergerät fur unbeabsichtigte bewegung und aufzug
US20160289045A1 (en) * 2013-11-15 2016-10-06 Inventio Ag Safety brake for an elevator
WO2017098299A1 (en) 2015-12-07 2017-06-15 Otis Elevator Company Robust electrical safety actuation module

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Publication number Publication date
ES2887940A1 (es) 2021-12-29
ES2887940B2 (es) 2023-01-26

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