EP2920101B1 - Ascenseur avec frein de sécurité - Google Patents

Ascenseur avec frein de sécurité Download PDF

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Publication number
EP2920101B1
EP2920101B1 EP13802541.6A EP13802541A EP2920101B1 EP 2920101 B1 EP2920101 B1 EP 2920101B1 EP 13802541 A EP13802541 A EP 13802541A EP 2920101 B1 EP2920101 B1 EP 2920101B1
Authority
EP
European Patent Office
Prior art keywords
brake
lift
articulated arm
safety
brake body
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
EP13802541.6A
Other languages
German (de)
English (en)
Other versions
EP2920101A1 (fr
Inventor
Stefan Hugel
Daniel Fischer
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.)
Inventio AG
Original Assignee
Inventio AG
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 Inventio AG filed Critical Inventio AG
Priority to EP13802541.6A priority Critical patent/EP2920101B1/fr
Publication of EP2920101A1 publication Critical patent/EP2920101A1/fr
Application granted granted Critical
Publication of EP2920101B1 publication Critical patent/EP2920101B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures

Definitions

  • the invention relates to an elevator with a safety brake, in particular an electrically releasable safety brake, which can prevent a possible crash of a car in a dangerous operating state of the elevator.
  • a traction drive is composed at least of a motor, a traction sheave and a traction means, such as a rope or belt.
  • the motor drives the traction sheave via a shaft.
  • the traction sheave transmits traction to the traction means by means of frictional forces.
  • the traction means are a cab and a counterweight that balances the weight of the cab suspended.
  • a hydraulic drive comprises at least a hydraulic cylinder and a hydraulic piston. In the hydraulic cylinder, a working fluid is compressed, which converts the hydraulic piston depending on the built-up pressure in a vertical upward or downward movement. A mounted on the piston cab is moved accordingly.
  • the European safety standard EN-81 requires the use of a safety brake or a so-called safety brake.
  • a safety brake is mounted on the cab and can save the cab from a fatal crash in the event of a drive failure such as a tractional rupture or a rapid pressure drop in the hydraulic cylinder.
  • the safety brake is traditionally connected to a mechanical speed limiter. This speed limiter triggers the safety brake in the event of an overspeed, the safety brake builds up a braking force on the guide rails and thus brings the car to a safe stop.
  • the patent EP 1 400 476 A1 shows, for example, such an electronically triggered safety brake.
  • This safety brake can be triggered by a solenoid controlled by the overspeed governor and must be fail-safe actuated. Therefore, the safety brake is held by the electric motor against a spring-biased lever arm in a rest position. In the event of a power failure, power to the solenoid is cut off and the energy stored in the spring is released. Consequently, the safety brake is triggered.
  • safety brake is characterized by a high trip safety. However, this is associated with a constantly energized at rest, solenoid to hold the safety brake against a preloaded spring in a rest position.
  • the object of the present invention is to develop an electronically releasable safety brake, which identifies a low energy requirement even when at rest.
  • an elevator with a car which is guided on guide rails, and with a safety brake which is arranged on the car and which is designed to exert a braking force on the guide rails in the event of non-compliance with a safety criterion.
  • the safety brake comprises a brake housing which has a wedge-shaped opening in which at least part of a guide rail is insertable, a brake body which is insertable in the wedge-shaped opening between a wedge-shaped opening defining surface of the brake housing and a guide surface of the guide rail Activation mechanism, via which an activation force is transferable to the brake body and over which the brake body can be pressed against the limiting surface and guide surface, and a release mechanism which is directly or indirectly connected to the brake body and holds the brake body against the activation force in a rest position.
  • the elevator is characterized in that the release mechanism has at least one articulated arm, which can be brought into an extended position and a folded position, the articulated arm in the extended position holding the brake body in the rest position and in the folded position, the activation force for a Transmission on the brake body releases.
  • the advantage of the invention is that by means of the articulated arm, the safety brake can be kept against a relatively high activation force with little energy in a rest position.
  • the release mechanism for the release of the activation force also requires little energy, since the articulated arm is easily brought from its extended position with the application of a small lateral force in a kinked position.
  • the release mechanism has an adjustment mechanism connected to the articulated arm.
  • the adjusting mechanism is designed to bend the articulated arm from its extended position to its kinked position.
  • the adjusting mechanism has an electric drive, in particular a solenoid or linear motor of the like. This drive is controlled to bring the articulated arm of the stretched position in the folded position.
  • the adjusting mechanism is connected to a deflectable joint of the articulated arm.
  • a particularly simple connection to the actuating mechanism can be created at the joint and secondly, the force that acts upon the force of rotation is particularly small when the force is applied to the joint because of the maximum utilization of the lever effects.
  • the activation mechanism has a lever arm, which is operatively connected to the brake body and transmits the activation force to the brake body.
  • a lever arm which is operatively connected to the brake body and transmits the activation force to the brake body.
  • the ratio between the activation force and the structure of the braking force can be adjusted particularly easily and reliably.
  • the lever arm is connected to the articulated arm in such a way that, in its extended position, the articulated arm holds the lever arm against the activation force in the rest position.
  • the lever arm is connected to a prestressable spring, which pretensioned transmits the activation force to the lever arm.
  • the pen is a special one low-cost component that can store the activation force over long periods of time and delivers reliably when needed.
  • a longitudinal axis of the articulated arm and a longitudinal axis of the spring are aligned with each other.
  • the release mechanism is controllable by a safety device, wherein the safety device monitors the safety criterion and, if the safety criterion is not met, controls the release mechanism to such an extent that the activation force can be released for transmission to the brake body.
  • the safety criterion is a car speed, a fluid operating pressure of a hydraulic drive or a state of a suspension means on which the car is suspended.
  • the brake body is designed as a roller body or wedge.
  • Such brake bodies are reliably wedged between the limiting surface of the brake housing and the guide surface of a guide rail and accordingly exert a sufficient braking force on the guide rail in each case.
  • FIG. 1 shows an embodiment of the elevator 10 with a car 11.
  • the car 11 is in a shaft 14 along a roadway, which is defined by guide rails 12, movable.
  • the elevator 10 has a hydraulic drive.
  • only one hydraulic piston 13 thereof is visible. Not visible is a hydraulic cylinder in which the hydraulic piston 13 is guided and which moves the hydraulic piston 13 vertically up or down.
  • the cabin 11 is equipped at the bottom with two safety brakes 1.
  • the elevator 10 can be equipped with a traction drive as an alternative to the hydraulic drive, which has traction means on which the car 11 and a counterweight are suspended, and a motor which has a traction drive is in operative contact with the traction means via a traction sheave.
  • traction means ropes, belts or the like can be used.
  • the safety brake 1 is shown in a rest position.
  • the safety brake comprises a brake housing 2, a brake body 3, an activation mechanism 4 and a release mechanism 5.
  • the brake housing 2 has an opening 20 in which at least part of a guide rail 12 can be inserted.
  • the guide rail 12 is made as a T-profile.
  • the guide rail 12 may be designed as a U-profile or other suitable profile shape.
  • the cab 11 facing the end flange of the guide rail 12 is inserted into the opening 20 of the brake housing 2.
  • the opening 20 is delimited on one side by a first surface extending parallel to the guide rail 12 and on the other side by a second surface which, together with the first surface, defines a space wedge-shaped tapering towards the top.
  • the brake body 3 is held in a lower rest position.
  • the brake body is here designed as a roller body, which is pressed after activation of the brake on the second surface of the brake housing 3 and a guide surface of the guide rail 12 and wedged in a vertically downward movement direction of the car 11 further between the second surface and the guide surface , In this case, the guide rail 12 between the first surface of the brake housing 2 and the brake body 3 clamped.
  • the safety brake 1 thus exerts a braking force on the guide rail 12.
  • the brake body 3 deviating from the reel body also wedge-shaped or another suitable form engaging interpreted interpretable.
  • the activation mechanism 4 comprises a lever arm 8 and a compression spring 9, which in FIG. 2 is shown in a biased position.
  • the lever arm 8 is articulated at a first end with respect to the brake housing 2.
  • At its second freely movable end of the brake body 3 is mounted.
  • the compression spring 9 starts.
  • the compression spring 9 is arranged pressed between the lever arm 8 and the brake housing 2 and thus exerts an activation force on the lever arm 8.
  • the release mechanism 5 comprises an articulated arm 6 and an adjusting mechanism 7.
  • the articulated arm 6 is composed of two rod elements, which are connected via a deflectable joint.
  • a first end of the buckling bar 6 is articulated relative to the brake housing 2.
  • a second end is hingedly connected to the lever arm 8.
  • the adjusting mechanism 7 is mounted on the brake housing 3 and connected via the joint between the rod elements with the lever arm 8.
  • the adjusting mechanism 7 holds the articulated arm 6 in the one shown FIG. 2 in a stretched position. In the extended position of the articulated arm 6 acts against the activation force of the spring 9 and thus keeps the brake body 3 in the rest position.
  • the adjusting mechanism 7 may be realized as a solenoid, linear motor or the like.
  • a movable element of the adjusting mechanism 7 is connected to the joint of the articulated arm 6.
  • the adjusting mechanism 7 can be controlled by a safety device, not shown.
  • This safety device comprises at least one speed limiter, which upon detection of an overspeed of the car 11 controls the setting mechanism 7 to such an extent that the release mechanism 5 releases the activation force.
  • the safety device may also include a pressure sensor, which monitors the pressure of the working fluid in the hydraulic cylinder in a hydraulically driven elevator 10 and also controls the actuating mechanism 7 to release the activation energy at a critical negative pressure. The same applies to a further sensor of the safety device, which monitors a traction means and the control mechanism 7 controls accordingly in a crack of the traction means.
  • FIG. 3 shows the safety brake 1 in an activated state.
  • the adjusting mechanism 7 of the release mechanism 5 is controlled by the safety device.
  • the adjusting mechanism 7 brings the buckling bar 6 from its extended position in a bent position.
  • the force acting on the buckling mechanism 6 by the adjusting mechanism 7 is in the FIG. 3 represented by an arrow.
  • the stored energy in the spring 5 is released as an activating force, wherein the activation force is transmitted in the illustration shown vertically upwards on the lever arm 4.
  • the lever arm 4 is offset by the activation force about its bearing point in a rotational movement upward and transmits the activation force on the brake body 3.
  • the brake body 3 is pressed against the second surface of the brake housing 2 and the guide surface of the guide rail 12.
  • the brake body 3 wedged between said surfaces and clamps the guide rail against the first surface of the brake housing 2.
  • the force applied to the guide rail 12 braking force finally brings the car 11 to a standstill.
  • the safety brake 1 can also prevent inadmissible upward travel.
  • the safety brake 1 is vertically mirror-inverted to the cabin 11 to be arranged.
  • the brake body is pressed after the release of the activation force vertically downwards against the second surface of the brake housing and the guide surface of the guide rail and wedged in a vertically upward movement of the car 11 between said surfaces.
  • the brake body clamps the guide rail 12 against the first surface of the brake housing and thus brings the car 11 to a standstill.
  • the release mechanism 5 has an energy storage unit, not shown, such as a battery, another spring or similar. This energy storage unit ensures that the safety brake 1 remains activated even in the event of a power failure.
  • the release mechanism 5, in particular the deflectable joint of the articulated arm 6 comprise a one-sided stop.
  • the stop is particularly advantageously arranged with respect to a movement of the joint such that a maximum movement of the joint against the stop results in a slight overstretching of the articulated arm 6.
  • the stop is located on the side facing away from the adjusting mechanism 7.
  • the release mechanism 5 optionally has the further spring, which exerts a release force on the articulated arm 6 in the direction of adjustment of the adjusting mechanism 7.
  • the adjusting mechanism 7 acts in the rest position of the safety brake 1 with a counterforce against the release force of the other spring and holds the articulated arm 6 against the stop of the deflectable joint pushing in its extended position.

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

Claims (11)

  1. Ascenseur (10)
    - avec une cabine (11) qui est guidée sur des rails de guidage (12), et
    - avec un frein de sécurité (1) qui est disposé sur la cabine (11) et qui est conçu pour exercer, en cas de non-respect d'un critère de sécurité, une force de freinage sur les rails de guidage (12),
    le frein de sécurité (1) comprenant un carter de frein (2) qui présente une ouverture en forme de coin (20) dans laquelle une partie au moins d'un rail de guidage (12) est apte à être introduite, un corps de frein (3) qui est apte à être introduit dans l'ouverture en forme de coin entre une surface du carter de frein (2) qui limite ladite ouverture en forme de coin, et une surface de guidage du rail de guidage (12), un mécanisme d'activation (4) par l'intermédiaire duquel une force d'activation est apte à être transmise au corps de frein (3) et par l'intermédiaire duquel le corps de frein (3) est apte à être pressé contre la surface de limitation et la surface de guidage, et un mécanisme de déblocage (5) qui est relié directement ou indirectement au corps de frein (3) et qui maintient le corps de frein (3) dans une position à l'encontre de la force d'activation,
    caractérisé en ce que le mécanisme de déblocage (5) dispose au moins d'un bras articulé (6) qui est apte à être amené dans une position tendue et dans une position pliée, le bras articulé (6), en position tendue, maintenant le corps de frein (3) dans la position de repos, et, en position pliée, débloquant la force d'activation pour une transmission au corps de frein (3), et en ce que le mécanisme d'activation (4) dispose d'un bras de levier (8) qui est en relation fonctionnelle avec le corps de frein (3) et qui transmet la force d'activation au corps de frein (3), et en ce que le bras de levier (8) est relié au bras articulé (6) de telle sorte que celui-ci, dans sa position tendue, maintient le bras de levier (8) dans la position de repos à l'encontre de la force d'activation.
  2. Ascenseur (10) selon la revendication 1, caractérisé en ce que le mécanisme de déblocage (5) dispose d'un mécanisme de manoeuvre (7) qui est relié au bras articulé (6), le mécanisme de manoeuvre (7) étant conçu pour plier le bras articulé (6) et le faire passer de sa position tendue à sa position pliée.
  3. Ascenseur (10) selon la revendication 2, caractérisé en ce que le mécanisme de manoeuvre (7) dispose d'une commande électrique, en particulier un solénoïde ou un moteur linéaire, qui est apte à être commandée pour amener le bras articulé (6) de sa position tendue à sa position pliée.
  4. Ascenseur (10) selon l'une des revendications 2 ou 3, caractérisé en ce que le mécanisme de manoeuvre (7) est relié à une articulation du bras articulé qui est apte à être déviée.
  5. Ascenseur (10) selon la revendication 1, caractérisé en ce que le bras de levier (8) est relié à un ressort (9) apte à être contraint qui, contraint, transmet la force d'activation au bras de levier (8).
  6. Ascenseur (10) selon la revendication 5, caractérisé en ce qu'un axe longitudinal du bras articulé (6) et un axe longitudinal du ressort (9) sont dans l'alignement l'un de l'autre.
  7. Ascenseur (10) selon la revendication 1, caractérisé en ce que le mécanisme de déblocage (5) dispose d'une unité d'accumulation d'énergie, en particulier une batterie ou un ressort.
  8. Ascenseur (10) selon la revendication 7, caractérisé en ce que l'autre ressort exerce une force de déblocage sur le bras articulé (6), le mécanisme de manoeuvre (7), dans la position de repos du frein de sécurité (1), agissant avec une force opposée à l'encontre de la force de déblocage et maintenant le bras articulé (6) dans sa position tendue.
  9. Ascenseur (10) selon la revendication 1, caractérisé en ce que le mécanisme de déblocage (5) est apte à être commandé par un dispositif de sécurité, le dispositif de sécurité surveillant le critère de sécurité et, en cas de non-respect dudit critère de sécurité, commandant le mécanisme de déblocage (5) de telle sorte que la force d'activation puisse être débloquée pour une transmission au corps de frein.
  10. Ascenseur (10) selon la revendication 9, caractérisé en ce que le critère de sécurité représente une vitesse de cabine, une pression de service de fluide d'une commande hydraulique, ou un état d'un élément porteur auquel la cabine (11) est suspendue.
  11. Ascenseur (10) selon la revendication 1, caractérisé en ce que le corps de frein (3) est conçu comme un corps de galet ou un coin.
EP13802541.6A 2012-11-13 2013-11-05 Ascenseur avec frein de sécurité Active EP2920101B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13802541.6A EP2920101B1 (fr) 2012-11-13 2013-11-05 Ascenseur avec frein de sécurité

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12192317 2012-11-13
EP13802541.6A EP2920101B1 (fr) 2012-11-13 2013-11-05 Ascenseur avec frein de sécurité
PCT/EP2013/073057 WO2014075954A1 (fr) 2012-11-13 2013-11-05 Ascenseur équipé d'un frein de sécurité

Publications (2)

Publication Number Publication Date
EP2920101A1 EP2920101A1 (fr) 2015-09-23
EP2920101B1 true EP2920101B1 (fr) 2017-01-11

Family

ID=47177810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13802541.6A Active EP2920101B1 (fr) 2012-11-13 2013-11-05 Ascenseur avec frein de sécurité

Country Status (5)

Country Link
US (1) US9695011B2 (fr)
EP (1) EP2920101B1 (fr)
CN (1) CN104781175B (fr)
ES (1) ES2622333T3 (fr)
WO (1) WO2014075954A1 (fr)

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US10486939B2 (en) 2015-09-27 2019-11-26 Otis Elevator Company Breaking system for a hoisted structure and method of controlling braking a hoisted structure
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DE102016218635A1 (de) 2016-09-28 2018-03-29 Thyssenkrupp Ag Elektromechanischer Betätiger zum Betätigen einer Bremse einer Aufzugsanlage
US10173144B2 (en) 2016-10-19 2019-01-08 James HEATH Lift system with moving cam assembly and related methods
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EP3670414B1 (fr) * 2018-12-20 2023-06-14 KONE Corporation Système de déclenchement et de réinitialisation de l'équipement de sécurité d'ascenseur
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Also Published As

Publication number Publication date
CN104781175B (zh) 2016-09-14
WO2014075954A1 (fr) 2014-05-22
US20160272464A1 (en) 2016-09-22
EP2920101A1 (fr) 2015-09-23
ES2622333T3 (es) 2017-07-06
US9695011B2 (en) 2017-07-04
CN104781175A (zh) 2015-07-15

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