Safety monitoring device for a lift car

B - Operations – Transporting – 66 – B

Patent

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Details

B66B 5/04 (2006.01) B66B 3/00 (2006.01) B66B 5/06 (2006.01)

Patent

CA 2491806

The invention relates to a safety monitoring device for a lift car (1) which can be moved in a lift shaft (A) by means of a traction drive (D) via a lift control system (9) and whose instantaneous position can be registered by means of a position registering device which supplies two position signals, produced independently of each other, in a predetermined time pattern, having two-channel evaluation of the position signals by means of a microprocessor (13a, 13b) in each case for location-dependent, instantaneous determination of the speed of the lift car (1) and for comparison with a predefined movement profile, it being possible for a trigger signal that can be output via a safety relay stage (19) to be generated if a predetermined instantaneous speed desired value is exceeded.

Cette invention se rapporte à un dispositif de surveillance de la sécurité pour une cabine d'ascenseur (1) qui est déplaçable dans une gaine d'ascenseur (A) au moyen d'une transmission de dispositif de déplacement (D), via un système de commande d'ascension (9). La position instantanée dudit dispositif de surveillance peut être enregistrée au moyen d'un enregistreur de position qui fournit deux signaux de position, produits indépendamment l'un de l'autre, selon un diagramme temporel prédéterminé. Ce diagramme comporte l'évaluation par deux canaux des signaux de position, au moyen d'un microprocesseur (13a, 13b). Dans chaque cas, cette évaluation s'applique à la détermination instantanée, en fonction de l'emplacement, de la vitesse de la cabine d'ascenseur (1). En effectuant la comparaison à un profil de mouvement prédéfini, il est possible de produire un signal de déclenchement, par le biais d'un étage de relais de sécurité (19), en cas de dépassement de la valeur désirée de la vitesse instantanée prédéterminée.

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