EP1209117B1 - Elevator car parachute system with up and down actuation - Google Patents

Elevator car parachute system with up and down actuation Download PDF

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Publication number
EP1209117B1
EP1209117B1 EP00927252A EP00927252A EP1209117B1 EP 1209117 B1 EP1209117 B1 EP 1209117B1 EP 00927252 A EP00927252 A EP 00927252A EP 00927252 A EP00927252 A EP 00927252A EP 1209117 B1 EP1209117 B1 EP 1209117B1
Authority
EP
European Patent Office
Prior art keywords
roller
actuation
block
cabin
ramp
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.)
Expired - Lifetime
Application number
EP00927252A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1209117A1 (en
Inventor
Javier Inchaurza San Pedro
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.)
Selcom Aragon SA
Original Assignee
Selcom Aragon SA
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 Selcom Aragon SA filed Critical Selcom Aragon SA
Publication of EP1209117A1 publication Critical patent/EP1209117A1/en
Application granted granted Critical
Publication of EP1209117B1 publication Critical patent/EP1209117B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 refers to an anti-crash system for elevator cabins, with ascending and descending actuation, with which notable advantages are contributed to the operation of electrical traction elevators.
  • the elevator cabin is suspended from steel cables which, because of the resulting adherence in the groove of the traction pulley and depending on its direction of rotation, causes the cabin to be able to move in the ascending and descending direction.
  • the operation sequence is as follows.
  • the speed limiter is synchronized with the motion of the cabin and is regulated so that it is electrically triggered, either in the ascent or in the descent, in order to force the machine to stop by means of an electrical anti-crash system before the cabin reaches the speed at which the regulator is triggered, which must be a minimum of 115% of the cabin rated speed and a maximum of a value that depends on that rated speed.
  • the cabin In the descending motion, if in spite of the above action, either due to a fault in the braking system of the machine or due to a breakage of the suspension bodies, the cabin continues to descend and increases its speed, then the speed limiter is mechanically blocked and it causes the anti-crash system for the cabin to actuate by grasping the elevator guides, thus causing the elevator to stop.
  • the anti-crash system can be of the following types:
  • the cabin has to be equipped with an anti-crash system that can only act in the downward direction, capable of halting the cabin under full load at the regulator triggering speed, even in the case of breakage of the suspension bodies, which it does by grasping the guides for the cabin and capable of keeping it retained in them.
  • the norm has modified the content of some articles in order to expressly allow that an anti-crash system can be used when the cabin is rising in accordance with regulations as a protective means against excess cabin speed.
  • the anti-crash systems used can be one of two types: a) instantaneous action and b) progressive action.
  • the basic designs are based on ramps, elastic elements combined with rollers or wedges that move in combination with the ramp producing the gradual halting of the cabin, or a design based on rotating cams which, combined with elastic elements, produce the gradual halting of the cabin by means of the corresponding rotation.
  • ES-U-1040377 discloses a progressive action security brake provided with a couple of brakes (one for each side of the cabin chassis) each brake comprising a frame, a shoe, an elastic component for regulating the braking force, and an element to transmit the force from the elastic component to the guide.
  • the anti-crash system for elevator cabins with ascending and descending actuation, which constitutes the object of the invention, proposes a solution to the problems stated above concerning ascending and descending anti-crash systems and both instantaneous action , and progressive action.
  • a descent ramp for the roller is added to the same block along with an elastic brake shoe for the upward motion of the cabin, and an articulated arm for actuation of the roller in order to overcome its displacement on the two ramps with angles of inclination of opposite sign.
  • the instantaneous actuation anti-crash system in other words, with instantaneous wedging, provides for the actuation of the roller on the knurled zone in order to wedge against the guide, as an instantaneous action anti-crash system in descent and transfer of the roller on the groove of the block in order to permit it to roll and act progressively when ascending in order to guarantee the permitted deceleration and subsequent unblocking of the system.
  • the elevator cabin is contained within the frame referenced in general with number 1.
  • the braking blocks 2 In the lower part of the frame 1 and on each side of it are the braking blocks 2, with one of them being connected, in this case via a draw tube 3, to the actuation cable of the speed limiter.
  • this actuator arm 5 by means of its integral shaft housed inside the roller 6 that was at rest being supported between the shaft 7 and the ramp of the block 8 of the anti-crash system, causes the said roller 6 to rise, becoming more and more enclosed until contact is made with the guide and it becomes wedged in it and causing the cabin to stop in its descent.
  • the braking force can be regulated according to the load to be halted, so that the application of the force can be gradual and controlled in such a way that the resulting deceleration is within the prescribed limits.
  • the block 15 which is characterized in that it has a recess with one vertical side parallel to the guide 17 and close to it, and the other formed by a ramp in the upper part, as has been done so far, for the wedging of the cabin during its descending motion, and in the lower part with the angle in the opposite direction, so that the roller 16 can act against the guide 17 in the upwards motion of the cabin.
  • This lower ramp has a longitudinal groove machined into it along the entire descending trajectory of the roller 16 in order to allow it to roll, as we will see later on.
  • the roller 16 has a staggered outline, with two diameters, unlike the rollers for instantaneous anti-crash systems for ascent only, which are cylindrical.
  • the central zone of larger diameter, is knurled and is the one that works against the guide 17.
  • the two side pins are smooth cylinders, of equal diameter, and which are going to permit the roller 16 to roll on the block 15 when it is acting in the rising motion of the cabin.
  • an articulated arm 23 is provided with its center of rotation in the shaft 24, composed of the following pieces:
  • This assembly means that, when the wedging is actuated, whether upwards or downwards, the actuator arm 26 is displaced with respect to the piece 27 to the same degree as the distance of the roller 16 to the rotating shaft for the assembly changes in its displacement, resting on the corresponding ramp of the block 15.
  • a rear plate 33 has been provided integral to the rotating shaft 24, which in general has a "T" shape.
  • two pistons 35 Integral to the support plate 34 of the system, though with possibilities of being adjusted, two pistons 35 are placed underneath the wings of the "T" shape of the rear plate 33, with these two pistons housing in their interior separate springs under compression with an initial pre-load, rolled around the shafts of the pistons and acting on those wings.
  • the position of the pistons in the system assembly is adjusted in such a way that the actuation force of them on the rear plate 33 is zero in the rest position of the roller 16 of the anti-crash system.
  • the draw bar acts upwards on the arm 25 which rotates pulling on the arm 26 which is longitudinally displaced on its two guides 27, 28, overcoming the force of the spring 31.
  • the roller 16 is displaced upwards rotating on its knurled face resting on the ramp of the block 15 until it makes contact with the guide 17.
  • the draw bar 3 acts downwards on the arm 5 with the same sequence of motion as in the above case, permitting the arm to be able to rotate downwards.
  • roller 16 is displaced towards the lower part of the block 15 rotating on the side pins, since the central knurled part remains in the air within the groove made in the block, until it comes up against the grooved brass stop 36.
  • the roller 16 is rolling due to the meshing action of its knurled part against the guide and the support for the smooth side pins against the stop and the ramp of the grooved block.
  • the lower stop 36 is mounted on a shaft screwed into the block 15 in such a way that the height of its position can be adjusted so that the roller always acts essentially centered with respect to the elastic brake shoe 18.
  • the brake shoe 18 is projecting slightly with respect to the vertical side of the block 15.
  • the roller 16 in the guided descent motion makes contact with the guide 17, it pushes the guide against the brake shoe 18, which, due to the strength of the spring pack 19, gives rise to a gradual braking force.
  • This force reaches a maximum at the moment the shoe reaches the same level as the rest of the vertical side of the block 15, since it cannot be compressed any further due to the fact that the guide 17 is now in simultaneous contact with the elastic shoe 18 and the rigid side of the block 15.
  • This system of stopping the cabin when ascending is of progressive action type in order that the deceleration when rising can be less than or equal to the action of gravity and in order to allow for the later unblocking of the system.
  • the reason for this is that, as it is not possible to act directly on the cabin from the outside, the weight of the cabin itself may not be sufficient for unblocking it in the event that a system was designed with roller wedging similar to that produced in the actuation during the descending motion. This is due to the fact that the roller 16 would remain embedded in the guide 17 and the block 15 and the weight of the cabin itself would not be sufficient for unblocking it.
  • the block 15 which, for acting in descent, is characterized in that it has the same elements as those mentioned in the classical anti-crash system, namely, the pair of leaf springs 9 and 10 which, acting on the roller 16, pushes the guide 17 against the brake shoe 18 giving rise to the stopping of the cabin exactly the same as in the method initially described.
  • the roller 16 Due to the fact that, in both the ascent and the descent, the actuation of the anti-crash system has to be progressive, the roller 16 has to be rotating during its actuation, because of which at all times, both when it is acting on the leaf springs (9, 10) during the actuation in descent, and when it is acting on the block 15 during the actuation in ascent, it must rest on the cylindrical side pins co-lateral to its knurled central zone and it must keep that knurled central part in the air throughout its possible travel.
  • the block 15 has been machined in such a way that the groove of the leaf springs and of the block form a continuous whole so that this condition can be guaranteed throughout the entire trajectory of the roller 16.
  • one of the pistons 35 can be seen whose head 37 acts on the corresponding wing of the "T" shaped rear plate 33 integral to the rotating shaft 24, as we had indicated earlier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Elevator Control (AREA)
  • Braking Arrangements (AREA)
EP00927252A 1999-05-28 2000-05-12 Elevator car parachute system with up and down actuation Expired - Lifetime EP1209117B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ES9901164 1999-05-28
ES9901164A ES2156730B1 (es) 1999-05-28 1999-05-28 Sistema paracaidas en cabina de ascensores, de actuacion en subida y bajada.
PCT/ES2000/000178 WO2000073193A1 (es) 1999-05-28 2000-05-12 Sistema paracaidas en cabina de ascensores, de actuacion en subida y bajada

Publications (2)

Publication Number Publication Date
EP1209117A1 EP1209117A1 (en) 2002-05-29
EP1209117B1 true EP1209117B1 (en) 2003-07-23

Family

ID=8308612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00927252A Expired - Lifetime EP1209117B1 (en) 1999-05-28 2000-05-12 Elevator car parachute system with up and down actuation

Country Status (4)

Country Link
EP (1) EP1209117B1 (ar)
DE (1) DE60004067D1 (ar)
ES (1) ES2156730B1 (ar)
WO (1) WO2000073193A1 (ar)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101107190B (zh) * 2005-01-21 2010-10-13 维托公开股份有限公司 用于电梯轿厢的制动或截停装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101233068B (zh) * 2006-07-26 2012-09-05 维托公开股份有限公司 一种用于电梯轿厢的制动或截停装置
ITMI20091725A1 (it) * 2009-10-08 2011-04-09 Gmv Spa Dispositivo di blocco di sicurezza per cabine di ascensori
DE202011102011U1 (de) 2011-06-17 2011-09-14 Schneider Aufzugstechnik Gmbh Vorrichtung zur Verhinderung unkontrollierter Fahrkorbbewegung
CN104649094A (zh) * 2015-02-09 2015-05-27 昆山京都电梯有限公司 防止轿厢意外移动结构
EP3569548A1 (en) * 2018-05-18 2019-11-20 Otis Elevator Company Elevator safety gear assembly

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE525684C (de) * 1927-11-04 1931-05-27 Otis Aufzugswerke G M B H Sicherheitsbremse fuer Fahrkoerbe von Aufzuegen
FR785534A (fr) * 1935-02-12 1935-08-12 Edoux Samain Ets Perfectionnements aux parachutes d'ascenseurs
DE1406188C3 (de) * 1962-04-14 1973-11-08 Franzen, Ludwig Ferdinand, Dipl.Phys., 5060 Bensberg Bremsfangvorrichtung fur Aufzuge
AT376952B (de) * 1983-03-21 1985-01-25 Otis Elevator Co Bremsfangvorrichtung
ES1040377Y (es) * 1998-06-04 1999-08-16 Latapia Llinas Alejandro Freno de seguridad de ascensor paracaidas mejorado para actuacion ascendente y descendente.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101107190B (zh) * 2005-01-21 2010-10-13 维托公开股份有限公司 用于电梯轿厢的制动或截停装置

Also Published As

Publication number Publication date
WO2000073193A8 (es) 2001-04-19
WO2000073193A1 (es) 2000-12-07
DE60004067D1 (de) 2003-08-28
ES2156730B1 (es) 2002-04-01
ES2156730A1 (es) 2001-07-01
EP1209117A1 (en) 2002-05-29

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