EP0562931A1 - Emergency braking device or safety catch for an elevator cabin with integrated damping means - Google Patents

Emergency braking device or safety catch for an elevator cabin with integrated damping means Download PDF

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Publication number
EP0562931A1
EP0562931A1 EP93400722A EP93400722A EP0562931A1 EP 0562931 A1 EP0562931 A1 EP 0562931A1 EP 93400722 A EP93400722 A EP 93400722A EP 93400722 A EP93400722 A EP 93400722A EP 0562931 A1 EP0562931 A1 EP 0562931A1
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EP
European Patent Office
Prior art keywords
parachute
cabin
emergency stop
housing
stop device
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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.)
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EP93400722A
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German (de)
French (fr)
Inventor
Dominique Prudhomme
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Individual
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Individual
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Publication of EP0562931A1 publication Critical patent/EP0562931A1/en
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    • 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 relates to an emergency stop device or parachute of an elevator car of the damped or instantaneous type with damped effect, capable of acting by jamming between an element of said car and at least one fixed rail on which the latter is guided during operation, the engagement of said parachute being effected automatically by means of a speed limiter when the latter is triggered, the cabin having damping means linked to the action of the parachute.
  • the parachutes can be instantaneous on the condition that this catch has a damped effect.
  • damping members for example rubber cleats of appropriate density and dimensions.
  • the parachutes with instantaneous catch are of a great simplicity and the inventive step consisted in using these and perfecting them so as to reach the desired goal, namely to obtain a parachute generally having simple, effective damping means which have no influence on the relative position of the cabin with respect to the guide rail in normal operation.
  • the device according to the invention may be perfectly suitable for the production of a cushioned parachute meeting the standard, since an instantaneous catch immediately followed by damping can, unless proven otherwise, be considered as a technical equivalent and therefore, the proposed device may be just as suitable for constituting an instantaneous parachute with damped effect ( ⁇ 1 m / second), as a parachute with damped effect (> 1 m / second).
  • the invention relates to an emergency stop device or parachute of an elevator car of the type with damped grip or instantaneous grip with damped effect, capable of acting by jamming between an element of said cabin. and at least one fixed rail on which the latter is guided during operation, the engagement of said parachute being effected automatically by means of a speed limiter when the latter is triggered, the cabin having means of damping linked to the action of the parachute, characterized in that the damping means are interposed between an instantaneous parachute and the cabin and act on it immediately after the engagement of the instantaneous parachute on the guide rail which is effected by means of a roller which acts by wedging between a ramp of an internal housing of the parachute and the guide rail which passes through it.
  • the cabin 1 designated as a whole in FIG. 1 is of the type, cited by way of nonlimiting example, supported by an arch 2 constituting a support frame of which a lower part is constituted by two U-shaped sections 3 and 4 whose backs 3a, 4a are arranged opposite one another at a distance "d" such as to delimit a longitudinal housing 5 at the ends of which the parachute 6 according to the invention is housed.
  • the elevator car 1 is guided during operation on longitudinal rails 7 and 8 fixed on the sides of the elevator shaft (not shown), the guidance being effected by a sliding of the guide nose 7a in an internal housing 9 of the parachute 6 and a hollowed out part 10 of the yoke frame 2.
  • the parachute 6 according to the invention is of the type with instantaneous catch with damped effect or with damped grip as mentioned above, and it acts by wedging between a fixed element of the cabin 1, in this case the sections 3 and 4 of the chassis 2 and the guide rails 7 and 8 on which said cabin 1 is guided by means of the internal housings 9 of the parachutes 6, arranged on either side of the cabin 1.
  • the speed limiter acts on the parachute 6 via a third actuation cable 13.
  • the actuating cable 13 actuates by known means and therefore not shown, a roller 14 which acts by wedging between an inclined ramp 15 of the internal housing 9 of the parachute 6 and the guide rail respectively 7, 8 which passes through it to bring said said rail resting against the right wall 16 of the same housing 9.
  • the parachute 6 has damping means 17, 18 linked to its own action. Damping means 17, 18 are interposed (see FIG. 2) between the upper part 19 of said instantaneous parachute 6 and the chassis 2 of the cabin 1 secured to these lower sections 3, 4.
  • Damping means 17, 18 are arranged so as to exert an action on the cabin 1 immediately after the triggering of the parachute at instantaneous grip 6 on the guide rail 7, 8.
  • the parachute 6 is constituted by a slide capable of moving longitudinally in the housing 5 delimited by the walls 3a, 4a of the sections 3, 4 and the frame 2 forming the bottom of the housing 5 which contains it.
  • FIG. 5 shows the parachute 6, on the one hand in position A, called the rest position, as shown in FIG. 2, and on the other hand in position B after triggering.
  • the vertical guide means 20 of the parachute 6 in its housing 5, are constituted by oblong slots 21 arranged opposite each side of the lateral faces 3a, 4a, of said housing 5 and in which are suitable for vertically slide pins 22, 23, 24, 25 integral with the corresponding lateral faces of the parachute 6 according to a stroke equal to the crushing value L2 of the damping means 17, 18, not acting on the relative position of the cabin 1 compared to guides 7, 8, only in the case of a parachute catch 6.
  • the guide pins 22, 23, 24, 25 of the parachute 6 are arranged symmetrically two by two, that is to say 22, 23 and 24, 25 on its lateral faces. Furthermore, it has been preferred that the guide pins 22, 23, 24, 25 are constituted by corresponding cylindrical screw heads 26, 27, 28, 29, screwed into the parachute 6 by rotating action in a hollow polygonal housing 30, 31, 32, 33 of said corresponding screws 26, 27, 28, 29. It may also be noted that the overtravel L2 of the cabin 1 or of the crushing value of these damping means 17, 18, is equal to the length L4 of the guide lights 21 minus the external distance L5 of two guide pins 22, 23 and 24, 25 of the parachute 6.
  • the damping means 17, 18 are constituted by elastic members with energy accumulation.
  • the elastic damping members are constituted by helical springs 17, 18 acting in compression against the crushing stroke L1 of the cabin 1, immediately after an instantaneous catch of the parachute 6 on the guide rail 7, 8, to obtain damping, the crushing of said springs 17, 18 being determined as a function of the stroke of the pins 22, 23 and 24, 25 in their corresponding guide lumen 21.
  • the helical springs 17, 18 are partially housed in corresponding recesses 34, 35 blind, formed on an upper face 19 of the parachute 6 on either side of the guide rail 7, 8, so as to ensure a balanced distribution of the damping on the cab 1.
  • the emergency stop device which has just been described further comprises an anti-rebound system acting immediately after a first crushing of the elastic damping means 17, 18 and which is constituted by a keeper 36 articulated freely on an axis exterior 37 secured to at least one of the parallel sections 3, 4 defining the housing 5 of the parachute 6, which keeper 36 is capable of spreading in a pandular movement under the action of a locking finger 38 coming from the parachute 6 and passing through the guide lumen 21, the keeper 36 being able to hook onto said finger 38 by a hook-shaped part 39 succeeding a ramp-shaped part 40.
  • the anti-rebound device can simultaneously control an electrical circuit breaker for the elevator (not shown).
  • the unlocking of cabin 1 after taking a parachute is carried out by manual intervention on the parachute 6 by moving said cabin 1 upwards in order to disengage said parachute, then by action on the keeper 36 of the anti-rebound system .
  • Such a device has the advantage, in addition to those already mentioned, of allowing the parachute to operate even if the anti-rebound system is not disarmed after operation, but the damping effects are then eliminated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)

Abstract

This device is of the type with damped take-up or instantaneous take-up with a damped effect capable of acting by wedging between an element (2) of the said cabin (1) and at least one guide rail (7, 8) on which the latter (1) is guided during operation, engagement of the said safety catch taking place automatically through the use of a speed limiter when the latter is triggered, the cabin (1) having available damping means connected to the action of the safety catch. It is characterised in that the damping means are interposed between an instantaneous take-up safety catch (6) and the cabin (1) and act on the latter immediately after the instantaneous take-up safety catch (6) on the guide rail (7, 8) has been engaged, this taking place through the use of a roller (14) which acts by wedging between an incline of an internal housing of the safety catch (6) and the guide rail (7, 8) which passes through it. <IMAGE>

Description

La présente invention concerne un dispositif d'arrêt d'urgence ou parachute d'une cabine d'ascenseur du type à prise amortie ou à prise instantanée à effet amorti, susceptible d'agir par coincement entre un élément de ladite cabine et au moins un rail fixe sur lequel est guidée cette dernière en cours de fonctionnement, l'enclenchement dudit parachute s'effectuant automatiquement par l'intermédiaire d'un limiteur de vitesse lors du déclenchement de ce dernier, la cabine disposant de moyens d'amortissement liés à l'action du parachute.The present invention relates to an emergency stop device or parachute of an elevator car of the damped or instantaneous type with damped effect, capable of acting by jamming between an element of said car and at least one fixed rail on which the latter is guided during operation, the engagement of said parachute being effected automatically by means of a speed limiter when the latter is triggered, the cabin having damping means linked to the action of the parachute.

La norme 82.210 et suivantes en matière d'ascenseur édicte dans son article 9.8.2, concernant les conditions d'emploi des différents types de parachutes, que ceux-ci doivent être à prise amortie si la vitesse nominale de l'ascenseur dépasse 1 mètre/seconde. Par contre la même norme stipule qu'ils peuvent être à prise instantanée si elle ne dépasse pas 0,63 m/seconde, ou à prise instantanée à effet amorti si ladite vitesse nominale ne dépasse pas 1 m/seconde.Standard 82.210 et seq. With regard to an elevator stipulates in its article 9.8.2, concerning the conditions of use of the different types of parachutes, that these must be with damped grip if the nominal speed of the elevator exceeds 1 meter /second. On the other hand, the same standard stipulates that they can be instantaneous setting if it does not exceed 0.63 m / second, or instantaneous damping effect if said nominal speed does not exceed 1 m / second.

Autrement dit, entre 0,63 m/seconde et 1 m/seconde, les parachutes peuvent être à prise instantanée à la condition que cette prise ait un effet amorti.In other words, between 0.63 m / second and 1 m / second, the parachutes can be instantaneous on the condition that this catch has a damped effect.

Pour obtenir cet effet, on pourrait bien entendu penser à interposer entre le fond de la cabine et son châssis support coulissant sur les rails guides fixes, des organes d'amortissement par exemple des taquets en caoutchouc de densité et de dimensions appropriées.To obtain this effect, one could of course think of interposing, between the bottom of the cabin and its support frame sliding on the fixed guide rails, damping members, for example rubber cleats of appropriate density and dimensions.

Cela procurerait sans aucun doute l'effet recherché mais créerait un certain nombre d'inconvénients dont le principal serait celui de modifier la position relative de la cabine par rapport à son châssis support en fonction de la charge et donc de modifier la position du plancher de cabine lors de son arrêt par rapport aux paliers des étages à desservir.This would undoubtedly provide the desired effect but would create a certain number of drawbacks, the main one of which would be that of modifying the relative position of the cabin with respect to its support frame as a function of the load and therefore of modifying the position of the floor of cabin when stopped compared to landings of the floors to be served.

Ceci aurait pour conséquence de créer une marche entre ledit plancher de cabine et le palier de l'étage considéré, ce qui, on le comprend bien, est nuisible à la sécurité des personnes qui peuvent buter sur cette marche.This would have the consequence of creating a step between said cabin floor and the landing of the floor in question, which, as is well understood, is detrimental to the safety of people who may come up against this step.

Par ailleurs, il paraît impossible de disposer d'organes d'amortissement adaptés à chaque cas de figure d'utilisation de la cabine en fonction de sa charge pour éviter l'inconvénient du décalage.Furthermore, it seems impossible to have damping devices adapted to each case of using the cabin as a function of its load to avoid the disadvantage of the shift.

Bien entendu, on pourrait également penser, en partant du principe que, qui peut le plus peut le moins, à utiliser des parachutes à prise amortie qui ne sont obligatoires qu'au-delà d'une vitesse nominale de 1 m/seconde. La norme précitée ne s'y oppose pas.Of course, one could also think, starting from the principle that, who can do the most can the least, to use parachutes with damped grip which are compulsory only above a nominal speed of 1 m / second. The aforementioned standard does not preclude this.

Néanmoins, si cette solution permet de combler le vide technologique qui existe actuellement en matière de parachute devant fonctionner entre 0,63 m/seconde et 1 m/seconde, elle constitue également un moyen inadapté et surtout d'un prix de revient trop élevé et non justifié dans la gamme d'ascenseurs considérés.However, if this solution makes it possible to fill the technological vacuum which currently exists in terms of parachute having to operate between 0.63 m / second and 1 m / second, it also constitutes an unsuitable means and especially of a too high cost price and not justified in the range of elevators considered.

En effet, les parachutes à prise amortie sont d'une réalisation très complexe.Indeed, cushioned parachutes are a very complex achievement.

Ils sont constitués d'une manière connue par une mâchoire élastique dans laquelle coulisse le rail-guide, ladite mâchoire comportant de part et d'autre des branches qui la composent d'où du rail, un premier élément mobile en forme de coin, susceptible d'être actionné vers le bas par l'intermédiaire du limiteur de vitesse lors du déclenchement de ce dernier, et un second élément mobile ou sabot de freinage progressif.They are constituted in a known manner by an elastic jaw in which the guide rail slides, said jaw comprising on either side of the branches which compose it, hence the rail, a first movable element in the form of a wedge, capable of to be actuated downwards via the speed limiter when the latter is triggered, and a second mobile element or progressive brake shoe.

Lors d'une action vers le bas sur le coin précité, cela provoque un contact par coincement sur le rail et conséquemment, sur le sabot de manière simultanée, ce dernier agissant à l'encontre d'un ressort de rappel qui lui est solidaire provoquant un arrêt amorti progressif.During a downward action on the aforementioned corner, this causes a contact by jamming on the rail and consequently, on the shoe simultaneously, the latter acting against a return spring. which is integral with it causing a progressive damped stop.

L'amortissement s'effectue ici simultanément au coincement, d'où la notion de prise amortie.Depreciation is carried out here simultaneously with jamming, hence the concept of damped grip.

Contrairement à cela, les parachutes à prise instantanée sont d'une grande simplicité et la démarche inventive a consisté à utiliser ceux-ci et à les perfectionner de sorte à atteindre le but recherché, à savoir obtenir un parachute disposant d'une manière générale de moyens d'amortissement simples, efficaces et n'ayant aucune influence sur la position relative de la cabine par rapport au rail de guidage en marche normale.Contrary to that, the parachutes with instantaneous catch are of a great simplicity and the inventive step consisted in using these and perfecting them so as to reach the desired goal, namely to obtain a parachute generally having simple, effective damping means which have no influence on the relative position of the cabin with respect to the guide rail in normal operation.

On peut estimer que le dispositif selon l'invention peut parfaitement convenir à la réalisation d'un parachute à prise amortie répondant à la norme, car une prise instantanée immédiatement suivie d'un amortissement peut, sauf à démontrer le contraire, être considérée comme un équivalent technique et par conséquent, le dispositif proposé peut aussi bien convenir pour constituer un parachute à prise instantanée à effet amorti (< 1 m/seconde), qu'un parachute à prise amortie (> 1 m/seconde).It can be estimated that the device according to the invention may be perfectly suitable for the production of a cushioned parachute meeting the standard, since an instantaneous catch immediately followed by damping can, unless proven otherwise, be considered as a technical equivalent and therefore, the proposed device may be just as suitable for constituting an instantaneous parachute with damped effect (<1 m / second), as a parachute with damped effect (> 1 m / second).

A cet effet, l'invention concerne un dispositif d'arrêt d'urgence ou parachute d'une cabine d'ascenseur du type à prise amortie ou à prise instantanée à effet amorti, susceptible d'agir par coincement entre un élément de ladite cabine et au moins un rail fixe sur lequel est guidée cette dernière en cours de fonctionnement, l'enclenchement dudit parachute s'effectuant automatiquement par l'intermédiaire d'un limiteur de vitesse lors du déclenchement de ce dernier, la cabine disposant de moyens d'amortissement liés à l'action du parachute, caractérisé en ce que les moyens d'amortissement sont interposés entre un parachute à prise instantanée et la cabine et agissent sur celle-ci immédiatement après l'enclenchement du parachute à prise instantanée sur le rail-guide qui s'effectue par l'intermédiaire d'un galet qui agit par coincement entre une rampe d'un logement interne du parachute et le rail-guide qui le traverse.To this end, the invention relates to an emergency stop device or parachute of an elevator car of the type with damped grip or instantaneous grip with damped effect, capable of acting by jamming between an element of said cabin. and at least one fixed rail on which the latter is guided during operation, the engagement of said parachute being effected automatically by means of a speed limiter when the latter is triggered, the cabin having means of damping linked to the action of the parachute, characterized in that the damping means are interposed between an instantaneous parachute and the cabin and act on it immediately after the engagement of the instantaneous parachute on the guide rail which is effected by means of a roller which acts by wedging between a ramp of an internal housing of the parachute and the guide rail which passes through it.

L'invention sera mieux comprise et d'autres caractéristiques de celle-ci seront mises en évidence à l'aide de la description qui suit, en référence aux dessins schématiques annexés, illustrant à titre d'exemples non limitatifs, comment l'invention peut être réalisée et dans lesquels:

  • la figure 1 représente schématiquement un parachute selon l'invention par rapport à une cabine d'ascenseur;
  • les figures 2, 3, 4 représentent respectivement, à échelle agrandie, un parachute selon l'invention, en vue de face, de dessus simplifiée et de côté, dans une position correspondante à une marche normale de l'ascenseur;
  • les figures 5 et 6 représentent respectivement en vue de face et de dessus simplifiée, un parachute selon l'invention, après un enclenchement de celui-ci.
The invention will be better understood and other characteristics thereof will be highlighted with the aid of the description which follows, with reference to the appended schematic drawings, illustrating by way of nonlimiting examples, how the invention can be performed and in which:
  • Figure 1 shows schematically a parachute according to the invention with respect to an elevator car;
  • Figures 2, 3, 4 show respectively, on an enlarged scale, a parachute according to the invention, in front view, simplified top and side, in a position corresponding to a normal step of the elevator;
  • Figures 5 and 6 show respectively in front view and simplified top, a parachute according to the invention, after engagement of the latter.

La cabine 1 désignée dans son ensemble sur la figure 1 est du type, citée à titre d'exemple non limitatif, supportée par une arcade 2 constituant un châssis support dont une partie inférieure est constituée par deux profilés en U 3 et 4 dont les dos 3a, 4a sont disposés en vis-à-vis de manière parallèle, à une distance "d" telle à délimiter un logement longitudinal 5 aux extrémités duquel est logé le parachute 6 selon l'invention.The cabin 1 designated as a whole in FIG. 1 is of the type, cited by way of nonlimiting example, supported by an arch 2 constituting a support frame of which a lower part is constituted by two U-shaped sections 3 and 4 whose backs 3a, 4a are arranged opposite one another at a distance "d" such as to delimit a longitudinal housing 5 at the ends of which the parachute 6 according to the invention is housed.

Comme le montre également la figure 1, la cabine d'ascenseur 1 est guidée en cours de fonctionnement sur des rails longitudinaux 7 et 8 fixés sur les côtés de la cage d'ascenseur (non représentée), le guidage s'effectuant par un coulissement du nez de guide 7a dans un logement interne 9 du parachute 6 et une partie évidée 10 du châssis d'arcade 2.As also shown in Figure 1, the elevator car 1 is guided during operation on longitudinal rails 7 and 8 fixed on the sides of the elevator shaft (not shown), the guidance being effected by a sliding of the guide nose 7a in an internal housing 9 of the parachute 6 and a hollowed out part 10 of the yoke frame 2.

Le parachute 6 selon l'invention est du type à prise instantanée à effet amorti ou à prise amortie comme évoqué précédemment, et il agit par coincement entre un élément fixe de la cabine 1, en l'occurrence les profilés 3 et 4 du châssis 2 et les rails guides 7 et 8 sur lesquels est guidée ladite cabine 1 par l'intermédiaire des logements internes 9 des parachutes 6, disposés de part et d'autre de la cabine 1.The parachute 6 according to the invention is of the type with instantaneous catch with damped effect or with damped grip as mentioned above, and it acts by wedging between a fixed element of the cabin 1, in this case the sections 3 and 4 of the chassis 2 and the guide rails 7 and 8 on which said cabin 1 is guided by means of the internal housings 9 of the parachutes 6, arranged on either side of the cabin 1.

De manière connue, l'enclenchement des parachutes 6 s'effectue automatiquement par l'intermédiaire d'un limiteur de vitesse (non représenté) lors du déclenchement de ce dernier.In known manner, the engagement of the parachutes 6 takes place automatically via a speed limiter (not shown) when the latter is triggered.

Le limiteur de vitesse agit sur le parachute 6 par l'intermédiaire d'un troisième câble d'actionnement 13.The speed limiter acts on the parachute 6 via a third actuation cable 13.

Le câble d'actionnement 13 actionne par des moyens connus et par conséquent non représentés, un galet 14 qui agit par coincement entre une rampe inclinée 15 du logement interne 9 du parachute 6 et le rail guide respectivement 7, 8 qui le traverse pour ramener ledit rail en appui contre la paroi droite 16 du même logement 9.The actuating cable 13 actuates by known means and therefore not shown, a roller 14 which acts by wedging between an inclined ramp 15 of the internal housing 9 of the parachute 6 and the guide rail respectively 7, 8 which passes through it to bring said said rail resting against the right wall 16 of the same housing 9.

Le parachute 6 dispose de moyens d'amortissement 17, 18 liés à sa propre action. Des moyens d'amortissement 17, 18 sont interposés (voir figure 2) entre la partie supérieure 19 dudit parachute 6 à prise instantanée et le châssis 2 de la cabine 1 solidaire de ces profilés inférieurs 3, 4.The parachute 6 has damping means 17, 18 linked to its own action. Damping means 17, 18 are interposed (see FIG. 2) between the upper part 19 of said instantaneous parachute 6 and the chassis 2 of the cabin 1 secured to these lower sections 3, 4.

Des moyens d'amortissement 17, 18 sont agencés de telle sorte à exercer une action sur la cabine 1 immédiatement après le déclenchement du parachute à prise instantanée 6 sur le rail guide 7, 8.Damping means 17, 18 are arranged so as to exert an action on the cabin 1 immediately after the triggering of the parachute at instantaneous grip 6 on the guide rail 7, 8.

Selon le présent exemple de réalisation, le parachute 6 est constitué par un coulisseau susceptible de se déplacer longitudinalement dans le logement 5 délimité par les parois 3a, 4a des profilés 3, 4 et le châssis 2 formant le fond du logement 5 qui le renferme.According to the present embodiment, the parachute 6 is constituted by a slide capable of moving longitudinally in the housing 5 delimited by the walls 3a, 4a of the sections 3, 4 and the frame 2 forming the bottom of the housing 5 which contains it.

Ce déplacement s'effectue à l'encontre des moyens d'amortissement 17, 18 par l'intermédiaire de moyens de guidage verticaux 20, selon une course L1 sensiblement égale à une valeur d'écrasement des moyens d'amortissement 17, 18 interposés entre la partie 19 du parachute 6 et le fond 2 du logement 5 qui le renferme.This movement takes place against the damping means 17, 18 by means of vertical guide means 20, along a stroke L1 substantially equal to a crushing value of the damping means 17, 18 interposed between part 19 of the parachute 6 and the bottom 2 of the housing 5 which contains it.

Ceci de manière à ce que lors d'une prise instantanée par coincement du galet 14 contre le rail 7, 8 dans le logement 9 du parachute 6 (voir figure 5), il s'ensuit une surcourse L2 vers le bas, des profilés 2, 3 d'où du châssis 2, d'où de la cabine 1, surcourse L2 égale à la valeur d'écrasement L1 prédéterminée.This so that during an instantaneous catch by wedging the roller 14 against the rail 7, 8 in the housing 9 of the parachute 6 (see FIG. 5), there follows an overtravel L2 downwards, of the profiles 2 , 3 hence the chassis 2, hence the cabin 1, overtravel L2 equal to the predetermined crushing value L1.

Ceci est particulièrement bien illustré par la figure 5 qui montre le parachute 6, d'une part en position A dite de repos, telle que représentée à la figure 2, et d'autre part en position B après déclenchement.This is particularly well illustrated by FIG. 5 which shows the parachute 6, on the one hand in position A, called the rest position, as shown in FIG. 2, and on the other hand in position B after triggering.

Les moyens de guidage verticaux 20 du parachute 6 dans son logement 5, sont constitués par des lumières oblongues 21 ménagées en vis-à-vis de part et d'autre des faces latérales 3a, 4a, dudit logement 5 et dans lesquelles sont aptes à coulisser verticalement des pions 22, 23, 24, 25 solidaires des faces latérales correspondantes du parachute 6 selon une course égale à la valeur d'écrasement L2 des moyens d'amortissement 17, 18, n'agissant sur la position relative de la cabine 1 par rapport aux guides 7, 8, exclusivement qu'en cas de prise de parachute 6.The vertical guide means 20 of the parachute 6 in its housing 5, are constituted by oblong slots 21 arranged opposite each side of the lateral faces 3a, 4a, of said housing 5 and in which are suitable for vertically slide pins 22, 23, 24, 25 integral with the corresponding lateral faces of the parachute 6 according to a stroke equal to the crushing value L2 of the damping means 17, 18, not acting on the relative position of the cabin 1 compared to guides 7, 8, only in the case of a parachute catch 6.

Les pions de guidage 22, 23, 24, 25 du parachute 6 sont disposés symétriquement deux à deux c'est-à-dire 22, 23 et 24, 25 sur ses faces latérales. Par ailleurs, il a été préféré que les pions de guidage 22, 23, 24, 25 soient constitués par des têtes de vis cylindriques 26, 27, 28, 29 correspondantes, vissées dans le parachute 6 par action en rotation dans un logement polygonal creux 30, 31, 32, 33 desdites vis correspondantes 26, 27, 28, 29. On peut aussi noter que la surcourse L2 de la cabine 1 ou de la valeur d'écrasement de ces moyens d'amortissement 17, 18, est égale à la longueur L4 des lumières de guidage 21 moins la distance externe L5 de deux pions de guidage 22, 23 et 24, 25 du parachute 6. Les moyens d'amortissement 17, 18 sont constitués par des organes élastiques à accumulation d'énergie.The guide pins 22, 23, 24, 25 of the parachute 6 are arranged symmetrically two by two, that is to say 22, 23 and 24, 25 on its lateral faces. Furthermore, it has been preferred that the guide pins 22, 23, 24, 25 are constituted by corresponding cylindrical screw heads 26, 27, 28, 29, screwed into the parachute 6 by rotating action in a hollow polygonal housing 30, 31, 32, 33 of said corresponding screws 26, 27, 28, 29. It may also be noted that the overtravel L2 of the cabin 1 or of the crushing value of these damping means 17, 18, is equal to the length L4 of the guide lights 21 minus the external distance L5 of two guide pins 22, 23 and 24, 25 of the parachute 6. The damping means 17, 18 are constituted by elastic members with energy accumulation.

Les organes élastiques d'amortissement sont constitués par des ressorts hélicoïdaux 17, 18 agissant en compression à l'encontre de la course d'écrasement L1 de la cabine 1, immédiatement après une prise instantanée du parachute 6 sur le rail guide 7, 8, pour l'obtention de l'amortissement, l'écrasement desdits ressorts 17, 18 étant déterminé en fonction de la course des pions 22, 23 et 24, 25 dans leur lumière de guidage correspondante 21.The elastic damping members are constituted by helical springs 17, 18 acting in compression against the crushing stroke L1 of the cabin 1, immediately after an instantaneous catch of the parachute 6 on the guide rail 7, 8, to obtain damping, the crushing of said springs 17, 18 being determined as a function of the stroke of the pins 22, 23 and 24, 25 in their corresponding guide lumen 21.

Les ressorts hélicoïdaux 17, 18 sont logés partiellement dans des évidements correspondants 34, 35 borgnes, ménagés sur une face supérieure 19 du parachute 6 de part et d'autre du rail guide 7, 8, de manière à assurer une répartition équilibrée de l'amortissement sur la cabine 1.The helical springs 17, 18 are partially housed in corresponding recesses 34, 35 blind, formed on an upper face 19 of the parachute 6 on either side of the guide rail 7, 8, so as to ensure a balanced distribution of the damping on the cab 1.

Le dispositif d'arrêt d'urgence qui vient d'être décrit comporte en outre un système anti-rebond agissant immédiatement après un premier écrasement des moyens élastiques d'amortissement 17, 18 et qui est constitué par une gâche 36 articulée librement sur un axe extérieur 37 solidaire d'au moins un des profilés parallèles 3, 4 définissant le logement 5 du parachute 6, laquelle gâche 36 est susceptible de s'écarter dans un mouvement pandulaire sous l'action d'un doigt de verrouillage 38 issu du parachute 6 et traversant la lumière de guidage 21, la gâche 36 étant apte à s'accrocher sur ledit doigt 38 par une partie en forme de crochet 39 succédant à une partie en forme de rampe 40.The emergency stop device which has just been described further comprises an anti-rebound system acting immediately after a first crushing of the elastic damping means 17, 18 and which is constituted by a keeper 36 articulated freely on an axis exterior 37 secured to at least one of the parallel sections 3, 4 defining the housing 5 of the parachute 6, which keeper 36 is capable of spreading in a pandular movement under the action of a locking finger 38 coming from the parachute 6 and passing through the guide lumen 21, the keeper 36 being able to hook onto said finger 38 by a hook-shaped part 39 succeeding a ramp-shaped part 40.

Le mouvement pendulaire de la gâche 36 lorsqu'elle est sollicitée par le doigt de verrouillage 38 s'effectue à l'encontre d'un ressort de rappel 41 interposé entre une partie inférieure C de ladite gâche 36 et une partie fixe D des profilés 3, 4.The pendulum movement of the keeper 36 when it is urged by the locking finger 38 takes place against a return spring 41 interposed between a lower part C of said keeper 36 and a fixed part D of the profiles 3 , 4.

Le dispositif anti-rebond peut commander simultanément un coupe-circuit électrique de l'ascenseur (non représenté).The anti-rebound device can simultaneously control an electrical circuit breaker for the elevator (not shown).

On dispose deux parachutes 6 de part et d'autre des profilés 3, 4 constituant une partie de châssis 2 de cabine 1, pour assurer un équilibrage de celle-ci lors de la prise de parachute.There are two parachutes 6 on either side of the sections 3, 4 constituting a chassis part 2 of cabin 1, to ensure that the latter is balanced when the parachute is taken.

Le déblocage de la cabine 1 après une prise de parachute s'effectue par une intervention manuelle sur le parachute 6 par un déplacement de ladite cabine 1 vers le haut afin de désenclencher ledit parachute, puis par action sur la gache 36 du système anti-rebond.The unlocking of cabin 1 after taking a parachute is carried out by manual intervention on the parachute 6 by moving said cabin 1 upwards in order to disengage said parachute, then by action on the keeper 36 of the anti-rebound system .

Un tel dispositif présente l'avantage outre, ceux déjà cités, de permettre le fonctionnement du parachute même si le système anti-rebond n'est pas désarmé après un fonctionnement, mais les effets d'amortissement sont alors supprimés.Such a device has the advantage, in addition to those already mentioned, of allowing the parachute to operate even if the anti-rebound system is not disarmed after operation, but the damping effects are then eliminated.

En effet, le système anti-rebond est totalement indépendant du fonctionnement du parachute et des moyens d'amortissement.Indeed, the anti-rebound system is completely independent of the functioning of the parachute and the damping means.

De même, s'il ne s'arme pas en cours de fonctionnement, l'action du parachute n'est pas compromise, seul l'effet anti-rebond est alors supprimé.Similarly, if it does not arm during operation, the action of the parachute is not compromised, only the anti-rebound effect is then suppressed.

Il est également possible de disposer de plusieurs jeux de ressorts de type différent pour couvrir la gamme d'ascenseur, en fonction de leur charge autorisée, en principe trois types de ressort couvrent, selon les essais, une plage allant de 180 à 1.000 kg de charge utile.It is also possible to have several sets of springs of different types to cover the lift range, depending on their authorized load, in principle three types of springs cover, according to tests, a range from 180 to 1,000 kg of payload.

Ceci offre l'avantage d'avoir peu de valeurs d'amortissement différentes en fonction de la charge utile de l'ascenseur à équiper en utilisant un parachute à prise instantanée standard, donc économique, en évitant les réglages (interventions toujours délicates) et le plombage du parachute.This offers the advantage of having few different damping values depending on the payload of the lift to be equipped using a standard instantaneous parachute, therefore economical, avoiding adjustments (always delicate interventions) and the sealing the parachute.

Bien entendu, selon les cas de figure, on pourra également jouer sur le tarage des ressorts et leur longueur pour l'obtention d'un parachute du type à prise amortie, ou à prise instantanée à effet amorti.Of course, depending on the scenario, we can also play on the calibration of the springs and their length to obtain a parachute of the type with damped grip, or instantaneous grip with damped effect.

Claims (10)

1) Dispositif d'arrêt d'urgence ou parachute d'une cabine d'ascenceur du type à prise amortie ou à prise instantanée à effet amorti, susceptible d'agir par coincement entre un élément support (2) de ladite cabine (1) et au moins un rail fixe (7, 8) sur lequel est guidée cette dernière (1) en cours de fonctionnement, l'enclenchement dudit parachute s'effectuant automatiquement par l'intermédaire d'un limiteur de vitesse lors du déclenchement de ce dernier, la cabine (1) disposant de moyens d'amortissement liés à l'action du parachute, et interposés entre ce dernier et la cabine (1) et agissant sur celle-ci immédiatement après l'enclenchement dudit parachute sur le rail-guide (7, 8) s'effectuant par l'intermédiaire d'un galet (14) qui agit par coincement entre une rampe (15) d'un logement interne (9) du parachute et le rail-guide (7, 8) qui le traverse, caractérisé en ce que le parachute (6) est constitué par un coulisseau susceptible de se déplacer longitudinalement dans un logement (5) réalisé à une partie inférieure ou supérieur de la cabine (1) et dans lequel il est guidé par des moyens de guidage verticaux (20), selon une course sensiblement égale à une valeur d'écrasement des moyens d'amortissement (17, 18) interposés entre le parachute (6) formant coulisseau et le fond du logement (5) qui le renferme, de manière telle que lorsqu'une prise instantanée par coincement du galet (14) contre le rail (7, 8) dans le logment interne (9) du parachute (6), ce dernier se solidarisant instantanément dudit rail (7, 8), il s'ensuit une surcourse (L 2) de la cabine (1) égale à la valeur d'écrasement prédéterminée, sans modification de la position relative de la cabine (1) par rapport à son élément support (2), quelque soit la charge. 1) Emergency stop device or parachute of an elevator car of the damped or instantaneous type with damped effect, capable of acting by jamming between a support element (2) of said cabin (1) and at least one fixed rail (7, 8) on which the latter is guided (1) during operation, the engagement of said parachute being effected automatically by the intermediary of a speed limiter when the latter is triggered , the cabin (1) having damping means linked to the action of the parachute, and interposed between the latter and the cabin (1) and acting on it immediately after the engagement of said parachute on the guide rail ( 7, 8) being effected by means of a roller (14) which acts by wedging between a ramp (15) of an internal housing (9) of the parachute and the guide rail (7, 8) which cross member, characterized in that the parachute (6) consists of a slide capable of moving longitudinally in a housing (5) made at a lower or upper part of the cabin (1) and in which it is guided by vertical guide means (20), according to a stroke substantially equal to a crushing value of the means of damping (17, 18) interposed between the parachute (6) forming a slide and the bottom of the housing (5) which encloses it, so that when an instantaneous catch by wedging the roller (14) against the rail (7, 8 ) in the internal housing (9) of the parachute (6), the latter instantaneously joining said rail (7, 8), it follows an overtravel (L 2) of the cabin (1) equal to the crushing value predetermined, without modification of the relative position of the cabin (1) relative to its support element (2), whatever the load. 2) Dispositif d'arrêt d'urgence selon la revendication 1, caractérisé en ce que le logement (5) dans lequel est susceptible de coulisser le parachute (6) à l'encontre des moyens d'amortissement (17, 18) est défini d'une part, par les faces latérales internes (3a, 4a) d'extrémité de deux profilés parallèles horizontaux (3, 4) constituant une partie inférieure de châssis (2) de la cabine (1) et d'autre part, le châssis (2) de la cabine (1) solidaire desdits profilés (3, 4) en constituant son fond. 2) Emergency stop device according to claim 1, characterized in that the housing (5) in which is capable of sliding the parachute (6) against the damping means (17, 18) is defined on the one hand, by the internal lateral faces (3 a , 4 a ) of the end of two horizontal parallel sections (3, 4) constituting a lower part of the chassis (2) of the cabin (1) and on the other hand , the chassis (2) of the cabin (1) integral with said profiles (3, 4) constituting its bottom. 3) Dispositif d'arrêt d'urgence selon l'une des revendications 1 ou 2, caractérisé en ce que les moyens de guidage verticaux (20) du parachute (6) dans son logement (5) sont constitués par des lumières oblongues (21) ménagées en vis-à-vis de part d'autre des faces latérales (3a, 4a) dudit logement (5) et dans lesquels sont aptes à coulisser verticalement des pions (22, 23, 24, 25) solidaires des faces latérales correspondantes du parachute (6) selon une course au moins égale à la valeur d'écrasement (L2) des moyens d'amortissement (17, 18), n'agissant sur la position relative de la cabine (1) par rapport au rail guide (7, 8), exclusivement qu'en cas de prise du parachute (6). 3) Emergency stop device according to one of claims 1 or 2, characterized in that the vertical guide means (20) of the parachute (6) in its housing (5) are constituted by oblong lights (21 ) provided in facing relation on either side of side faces (3a, 4a) of said housing (5) and which are adapted to vertically slide pins (22, 23, 24, 25) integral with the faces corresponding side of the parachute (6) at a stroke at least equal to the crushing value (L2) of the damping means (17, 18), not acting on the relative position of the cabin (1) relative to the rail guide (7, 8), only if the parachute (6) is taken. 4) Dispositif d'arrêt d'urgence selon la revendication 3, caractérisé en ce que les pions de guidage (22, 23, 24, 25) du parachute (6) sont disposés symétriquement deux à deux (22, 23) - (24, 25) sur ses faces latérales. 4) Emergency stop device according to claim 3, characterized in that the guide pins (22, 23, 24, 25) of the parachute (6) are arranged symmetrically in pairs (22, 23) - (24 , 25) on its side faces. 5) Dispositif d'arrêt d'urgence selon l'une des revendications 3 ou 4, caractérisé en ce que les pions de guidage (22, 23, 24, 25) sont constitués par des têtes de vis cylindriques (26, 27, 28, 29), vissées dans le parachute (6) par action en rotation dans un logement polygonal creux (30, 31, 32, 33) desdites vis (26, 27, 28, 29). 5) Emergency stop device according to one of claims 3 or 4, characterized in that the guide pins (22, 23, 24, 25) are constituted by cylindrical screw heads (26, 27, 28 , 29), screwed into the parachute (6) by rotating action in a hollow polygonal housing (30, 31, 32, 33) of said screws (26, 27, 28, 29). 6) Dispositif d'arrêt d'urgence selon l'une des revendications 3 ou 4, caractérisé en ce que la surcouse (L2) de la cabine (1), ou de la valeur d'écrasement de ces moyens d'amortissement (17, 18), est égale à la longueur (L4) de la lumière de guidage (21) moins le distance externe (L5) de deux pions de guidage (22, 23) - (24, 25) du parachute (6). 6) Emergency stop device according to one of claims 3 or 4, characterized in that the overcoat (L2) of the cabin (1), or the crushing value of these damping means (17 , 18), is equal to the length (L4) of the guide light (21) minus the external distance (L5) of two guide pins (22, 23) - (24, 25) of the parachute (6). 7) Dispositif d'arrêt d'urgence selon l'une des revendications 1 à 3, caractérisé en ce que les moyens d'amortissement sont des organes élastiqu es constitués par des ressorts hélicoïdaux (17, 18) agissant en compression à l'encontre de la course d'écrasement (L1) de la cabine (1), immédiatement après une prise instantanée du parachute (6) sur le rail guide (7, 8) pour l'obtention de l'amortisement, l'écrasement desdits ressorts (17, 18) étant déterminé en fonction de la course des pions (22, 23, 24, 25) dans les lumières de guidage (21). 7) Emergency stop device according to one of claims 1 to 3, characterized in that the damping means are elastic members es constituted by helical springs (17, 18) acting in compression against of the crushing stroke (L1) of the cabin (1), immediately after an instantaneous catch of the parachute (6) on the guide rail (7, 8) for obtaining the damping, the crushing of said springs ( 17, 18) being determined as a function of the travel of the pins (22, 23, 24, 25) in the guide slots (21). 8) Dispositif d'arrêt d'urgence selon la revendication 7, caractérisé en ce que les ressorts hélicoïdaux (17, 18) sont logés partiellement dans des évidemetns correspondants borgnes (34, 35) ménagés sur une face supérieure (19) du parachute (6), de part et d'autre du rail guide (7, 8), de manière à assurer une répartition équilibrée de l'amortissement sur la cabine (1). 8) An emergency stop device according to claim 7, characterized in that the helical springs (17, 18) are partially housed in corresponding blind recesses (34, 35) formed on an upper face (19) of the parachute ( 6), on either side of the guide rail (7, 8), so as to ensure a balanced distribution of the damping on the cabin (1). 9) Dispositif d'arrêt d'urgence selon l'une des revendications précédentes, caractérisé en ce qu'il comporte un système anti-rebond agissant immédiatement après un premier écrasement des moyens élastiques d'amortissement (17, 18) et qui est constitué par une gâche (36) articulée librement sur un axe extérieur (37) solidaire d'au moins un des profilés parallèles (3, 4) définissant le logement (5) du parachute (6) laquelle gâche (36) est susceptible de s'écarter dans un mouvement pendilaire sous l'action d'un doigt de verrouillage (38) issu du parachute (6) et traversant la lumière de guidage (21), la gâche (36) étant apte à s'accrocher sur ledit doigt (38) par une partie en forme de crochet (39), succédant à une partie en forme de rampe (40). 9) Emergency stop device according to one of the preceding claims, characterized in that it comprises an anti-rebound system acting immediately after a first crushing of the elastic damping means (17, 18) and which is constituted by a keeper (36) articulated freely on an external axis (37) integral with at least one of the parallel sections (3, 4) defining the housing (5) of the parachute (6) which keeper (36) is susceptible to move apart in a pendulum movement under the action of a locking finger (38) coming from the parachute (6) and passing through the guide light (21), the keeper (36) being able to hang on said finger (38) by a hook-shaped part (39), succeeding a ramp-shaped part (40). 10) Dispositif d'arrêt d'urgence selon la revendication 9, caractérisé en ce que le mouvement pendulaire de la gâche (36) lorsqu'elle est sollicitée par le doigt de verrouillage (38), s'effectue à l'encontre d'un ressort de rappel (41) interposé entre une partie inférieure (C) de ladite gâche (36) et une partie fixe (D) du profilé (3, 4). 10) Emergency stop device according to claim 9, characterized in that the pendulum movement of the keeper (36) when it is urged by the locking finger (38), is carried out against a return spring (41) interposed between a lower part (C) of said keeper (36) and a fixed part (D) of the profile (3, 4).
EP93400722A 1992-03-26 1993-03-22 Emergency braking device or safety catch for an elevator cabin with integrated damping means Withdrawn EP0562931A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9203632 1992-03-26
FR9203632A FR2689113A1 (en) 1992-03-26 1992-03-26 Emergency stop device or parachute of an elevator car having integrated damping means.

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2296487A (en) * 1994-12-27 1996-07-03 Hitachi Ltd Elevator Apparatus
EP0870719A1 (en) * 1997-04-11 1998-10-14 Inventio Ag Bearing element for a gripping device
US6012553A (en) * 1997-04-11 2000-01-11 Inventio Ag Mount for a lift cage safety device
EP1213247A1 (en) * 2000-12-07 2002-06-12 Inventio Ag Installation and method to release a safety brake
CN102942090A (en) * 2012-12-04 2013-02-27 蒂森克虏伯家用电梯(上海)有限公司 Safety tongs
EP3345854A1 (en) * 2017-01-05 2018-07-11 Aip Aps Damper
CN108408533A (en) * 2018-06-12 2018-08-17 许昌昌信机械制造有限公司 A kind of safety tongs for home lift
CN114635591A (en) * 2022-03-28 2022-06-17 江西奥德川自动化科技有限公司 Chain lifting mechanism with steel wire rope for preventing falling for parking equipment
CN117985566A (en) * 2024-04-03 2024-05-07 通用电梯股份有限公司 General type mechanical stopping device for elevator

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
FR2852587A1 (en) 2003-03-20 2004-09-24 Thyssenkrupp Elevator Mfg F DEVICE FOR RELEASING A PARACHUTE FOR AN ELEVATOR CAB, AS WELL AS THE PARACHUTE THUS EQUIPPED

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FR9390E (en) * 1906-03-28 1908-10-19 Societe Vernes, Guinet, Sigros Et Cie Safety parachute for lifts and freight elevators
AT297260B (en) * 1970-05-06 1972-03-27 Stefan Sowitsch & Co Ing Brake safety device for elevators
FR2397358A1 (en) * 1977-07-13 1979-02-09 Sscm Safety device for personnel hoist - has centrifugal governor to open hydraulic valves which apply brake to frame which carries hydraulic shock absorbers
DE2802619A1 (en) * 1978-01-21 1979-07-26 Dieter Brodthage Lift arrester and support buffer - has piston rods working in steel tubes with brake acting between
EP0099352A2 (en) * 1982-07-06 1984-01-25 Otis Elevator Company Braking device for lifts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR9390E (en) * 1906-03-28 1908-10-19 Societe Vernes, Guinet, Sigros Et Cie Safety parachute for lifts and freight elevators
AT297260B (en) * 1970-05-06 1972-03-27 Stefan Sowitsch & Co Ing Brake safety device for elevators
FR2397358A1 (en) * 1977-07-13 1979-02-09 Sscm Safety device for personnel hoist - has centrifugal governor to open hydraulic valves which apply brake to frame which carries hydraulic shock absorbers
DE2802619A1 (en) * 1978-01-21 1979-07-26 Dieter Brodthage Lift arrester and support buffer - has piston rods working in steel tubes with brake acting between
EP0099352A2 (en) * 1982-07-06 1984-01-25 Otis Elevator Company Braking device for lifts

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2296487A (en) * 1994-12-27 1996-07-03 Hitachi Ltd Elevator Apparatus
GB2296487B (en) * 1994-12-27 1996-12-04 Hitachi Ltd Elevator apparatus
CN1047360C (en) * 1994-12-27 1999-12-15 株式会社日立制作所 Elevator apparatus
EP0870719A1 (en) * 1997-04-11 1998-10-14 Inventio Ag Bearing element for a gripping device
US6012553A (en) * 1997-04-11 2000-01-11 Inventio Ag Mount for a lift cage safety device
US6758310B2 (en) 2000-12-07 2004-07-06 Inventio Ag Safety brake and method for unlocking a safety brake
EP1213247A1 (en) * 2000-12-07 2002-06-12 Inventio Ag Installation and method to release a safety brake
AU782430B2 (en) * 2000-12-07 2005-07-28 Inventio Ag Safety brake and method for unlocking a safety brake
CN102942090A (en) * 2012-12-04 2013-02-27 蒂森克虏伯家用电梯(上海)有限公司 Safety tongs
EP3345854A1 (en) * 2017-01-05 2018-07-11 Aip Aps Damper
WO2018127523A1 (en) * 2017-01-05 2018-07-12 Aip Aps Damper
CN108408533A (en) * 2018-06-12 2018-08-17 许昌昌信机械制造有限公司 A kind of safety tongs for home lift
CN114635591A (en) * 2022-03-28 2022-06-17 江西奥德川自动化科技有限公司 Chain lifting mechanism with steel wire rope for preventing falling for parking equipment
CN117985566A (en) * 2024-04-03 2024-05-07 通用电梯股份有限公司 General type mechanical stopping device for elevator

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