EP2769952B1 - Safety device for elevators and elevator comprising said device - Google Patents

Safety device for elevators and elevator comprising said device Download PDF

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Publication number
EP2769952B1
EP2769952B1 EP14382066.0A EP14382066A EP2769952B1 EP 2769952 B1 EP2769952 B1 EP 2769952B1 EP 14382066 A EP14382066 A EP 14382066A EP 2769952 B1 EP2769952 B1 EP 2769952B1
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EP
European Patent Office
Prior art keywords
switching element
safety device
elevator
counterweight
car
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.)
Active
Application number
EP14382066.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2769952A3 (en
EP2769952A2 (en
Inventor
Jokin Iartza Zubiria
Xabier Murua Arruti
Iban Díaz Ochandiano
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
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Publication date
Application filed by Orona S Coop filed Critical Orona S Coop
Publication of EP2769952A2 publication Critical patent/EP2769952A2/en
Publication of EP2769952A3 publication Critical patent/EP2769952A3/en
Application granted granted Critical
Publication of EP2769952B1 publication Critical patent/EP2769952B1/en
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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
    • B66B5/021—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions the abnormal operating conditions being independent of the system
    • B66B5/022—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions the abnormal operating conditions being independent of the system where the abnormal operating condition is caused by a natural event, e.g. earthquake
    • 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
    • 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
    • B66B5/28—Buffer-stops for cars, cages, or skips
    • B66B5/282—Structure thereof
    • 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
    • B66B5/28—Buffer-stops for cars, cages, or skips
    • B66B5/284—Buffer-stops for cars, cages, or skips mounted on cars or counterweights

Definitions

  • the present invention relates to a safety device for elevators which allows performing safety gear and pit buffer functions.
  • the present invention also relates to an elevator comprising said device.
  • An elevator installation has at least one car and generally one counterweight which are arranged such that they can travel in a guided manner in guide rails essentially in a vertical direction.
  • the car and counterweight are connected through suspension and traction means (cables).
  • the car and, when needed, the counterweight as well are protected by means of safety elements.
  • Two of the main safety elements are the safety gear, which prevents the free fall or uncontrolled movement of the car or of the counterweight such that it stops and immobilizes the car or the counterweight on its guides, and pit buffers which act if the car or the counterweight exceed specific course of travel limits.
  • the safety gear also known as wedging
  • wedging is responsible for stopping the car by means of the frictional force it exerts when acting on the guides of the car or the counterweight, and it must be capable of stopping the counterweight and/or the fully loaded car and keeping it stopped on the guides.
  • elevators must be equipped with pit buffers limiting the travel at the ends of the course of travel of the car or counterweight, thereby forming a final emergency device.
  • the function of these pit buffers is to stop both the car and the counterweight when needed.
  • Pit buffers are designed such that the buffer is capable of converting the kinetic energy of the car or of the counterweight at the time of impact into heat and potential energy due to deformation.
  • Pit buffers are usually located in the pit below the car and the counterweight as a safety element. They can also be arranged in the bottom part of the car and/or counterweight, although such solution is less common.
  • document EP 2 020 395 B1 describes the use of a variable braking force
  • document ES 1 072 741 describes the use of a fixed element in the shaft to activate the safety gear at a point of the course of travel.
  • neither of these documents describes a device which allows performing the dual safety gear and pit buffer function.
  • CN101979298 discloses an elevator safety stop trigger device.
  • the device comprises a support, a first swing arm shaft, a second swing arm shaft, a first swing arm, a second swing arm and a transmission mechanism, wherein the first swing arm and the second swing arm are hinged with pulling rods of a first safety tong and a second safety tong; the device also comprises an ascending trigger block and/or a descending trigger block and an ascending trigger rod and/or descending trigger rod, wherein the ascending trigger block and/or the descending trigger block are/is fixed on the inner wall of a shaft way or a guide rail.
  • the safety device for elevators of the present invention comprises braking means of the elevator car or counterweight located in the car or in the counterweight and acting on guides of the elevator, and said braking means comprise a switching element that can be arranged in at least:
  • said braking means exert more force in said second position of the switching element.
  • Said switching element travels to its second position preferably by means of an operating element envisaged in an area of the elevator shaft around the pit as the elevator car or counterweight approaches the ends of the course of travel.
  • said operating element is a flange, although it must be indicated that it could be any suitable operating element.
  • Said switching element is preferably associated with a swiveling element swiveling about an axis of rotation, such that in said second position, said switching element causes an additional travel of said swiveling element, said braking means exerting more force.
  • said swiveling element advantageously comprises an elastic element for pressing the swiveling element against said switching element
  • said switching element advantageously comprises an elastic element for pressing the switching element towards its first position
  • said switching element comprises a rotating end and a free end, wherein said rotating end of the switching element comprises a flat portion and a curved portion, said flat portion being in contact with a contact area associating said swiveling element and the switching element in the first position of said switching element, and said curved portion being in contact with said contact area in the second position of the switching element, causing the additional travel of said swiveling element.
  • Said free end of the switching element preferably comprises a disc which contacts the operating element of the elevator shaft in the second position of said switching element.
  • said swiveling element is a wedge provided with a ramp
  • said braking means comprise a roller which in the braking position pushes the guide of the elevator against a braking element provided with elastic elements to cause the braking of the elevator car or counterweight.
  • said roller slides along said ramp, causing said pushing against the guide of the elevator upon reaching a stop arranged at one of the ends of said ramp.
  • the present invention also relates to an elevator comprising the safety device as described above.
  • the safety device for elevators of the present invention comprises braking means of the elevator car or counterweight comprising a switching element 1 that can be arranged in at least two positions:
  • the device of the present invention also comprises a swiveling element 3, for example a wedge, which is associated with said switching element 1 through a contact area 6, as will be described below, and which can also be arranged in said first and second positions.
  • a swiveling element 3 for example a wedge, which is associated with said switching element 1 through a contact area 6, as will be described below, and which can also be arranged in said first and second positions.
  • Said swiveling element 3 swivels about an axis of rotation 13, such that in said second position, said switching element exerts greater pressure against said swiveling element, and comprises a ramp 7 provided with a stop 12 in the top part.
  • a roller 8 can slide along said ramp 7 depending on the speed of the elevator car and counterweight.
  • said switching element 1 and said swiveling element 3 comprise respective elastic elements 4, 5 pressing said elements into their first positions in which the braking means can function as a safety gear.
  • Said switching element 1 comprises a rotating end 1 a and a free end 1 b, and said rotating end 1 a has a flat area which is in contact with said contact area 6 in the first position of the switching element 1, and one of the edges defined by said flat area is in contact with said contact area 6 in the second position of the switching element 1, pressing against the swiveling element 3.
  • said free end 1b of the switching element 1 comprises a disc 14 which, in the second position of said switching element 1, contacts an operating element 2, for example a flange, located in an area of the elevator shaft around the pit as the elevator car approaches the pit.
  • an operating element 2 for example a flange
  • the safety device for elevators of the present invention also comprises a braking element 10 or shoe associated with elastic elements 11, the braking element 10 acting on the guide 9 of the elevator.
  • roller 8 has been depicted in the drawings in its two positions, i.e., the device of the present invention does not comprise two rollers but only one, which can be arranged in the depicted positions, as indicated in the present description.
  • the disc 14 at the free end 1 b of the switching element 1 contacts said flange and causes the switching element 1 to go into the second position, depicted in Figure 2 , in which the braking means function as a pit buffer.
  • This swiveling varies the angle of said ramp 7, such that the stroke of the roller along the axis perpendicular to the guide 9 is increased. Compression of the elastic elements 11 and accordingly the braking force increase.
  • the safety gear and pit buffer functions are thus achieved by means of the same safety device for elevators.
EP14382066.0A 2013-02-26 2014-02-26 Safety device for elevators and elevator comprising said device Active EP2769952B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201330259A ES2489968B1 (es) 2013-02-26 2013-02-26 Dispositivo de seguridad para ascensores y ascensor que comprende dicho dispositivo

Publications (3)

Publication Number Publication Date
EP2769952A2 EP2769952A2 (en) 2014-08-27
EP2769952A3 EP2769952A3 (en) 2014-10-29
EP2769952B1 true EP2769952B1 (en) 2017-04-05

Family

ID=50241351

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14382066.0A Active EP2769952B1 (en) 2013-02-26 2014-02-26 Safety device for elevators and elevator comprising said device

Country Status (2)

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EP (1) EP2769952B1 (es)
ES (2) ES2489968B1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180118513A1 (en) * 2015-04-28 2018-05-03 Otis Elevator Company Monitoring system for elevator system to ensure predetermined elevator shaft clearance
CN104944247B (zh) * 2015-05-11 2017-05-03 重庆交通大学 一种新型电梯坠落安全防护装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB377059A (en) * 1930-11-26 1932-07-21 Westinghouse Electric & Mfg Co Improvements in or relating to safety devices for elevators
DE2604157A1 (de) * 1976-02-04 1977-08-11 Aufzugswerk Gall & Heckelmann Bremsfangvorrichtung
AT374767B (de) * 1982-07-06 1984-05-25 Otis Elevator Co Bremsvorrichtung fuer aufzuege
JPS62205983A (ja) * 1986-03-07 1987-09-10 株式会社日立製作所 エレベ−タ−の非常止め装置
FI103962B1 (fi) * 1996-11-07 1999-10-29 Kone Corp Tarraaja
ES2343608B1 (es) 2007-08-03 2011-06-16 Orona, S.Coop Procedimiento y dispositivo de actuacion en situacion de emergencia en aparatos elevadores.
JP2011256016A (ja) * 2010-06-09 2011-12-22 Hitachi Ltd エレベーター装置
ES1072741Y (es) 2010-06-11 2010-12-28 Orona S Coop Dispositivo de seguridad para aparatos elevadores
CN101979298B (zh) * 2010-10-20 2013-03-13 日立电梯（中国）有限公司 电梯安全止停触发装置

Also Published As

Publication number Publication date
ES2631190T3 (es) 2017-08-29
ES2489968B1 (es) 2015-11-12
EP2769952A3 (en) 2014-10-29
EP2769952A2 (en) 2014-08-27
ES2489968R1 (es) 2015-02-19
ES2489968A2 (es) 2014-09-02

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