Control and regulation device for safeguarding a conveyor...

B - Operations – Transporting – 66 – C

Patent

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Details

B66C 23/90 (2006.01) B66D 1/58 (2006.01)

Patent

CA 2639815

The present invention concerns a control and regulation arrangement for protection of a conveyor (1), whereby in the following by "conveyor" is to be understood at least a hoisting or crane device, which is particularly designed to assure a safe reaction to overloading. To execute such protection, a brake apparatus (11, 18) is provided to act upon said conveyor (1) under government of overload sensor (29). Should the loading approach a predetermined threshold, a signal is emitted from the overload sensor (29), which is transmitted to a speed sensor (23, 24), thereby limiting the speed of conveyance. Simultaneously, the control (25, 30) transmits a signal to the brake equipment (11, 18) to the effect that the conveyor (1) is blocked and thus the object in transport (16) is removed from endangerment. Upon the receipt of a subsequent signal that a load relief state is to be established, the control (25, 30) frees the conveyor (1) to the extent, that the conveyor (1), in keeping with the existing weight of the object in transport (16), assumes said load relief state and thereby the action of braking on the conveyor (1) becomes relaxed in accord with the speed signal of the sensor (23, 24), so that the object in transport (16) moves toward a safely aligned position at a constant speed. The described embodiment of the invention also includes a conveyor (1) with right and left twin hoisting devices provided with duplicate control and regulation arrangements.

La présente invention concerne un ensemble de commande et de régulation pour sécuriser un dispositif transporteur (1), en particulier un système de grue en cas de surcharge. Cet ensemble comprend un dispositif de freinage (11, 18) agissant sur le dispositif transporteur (1), une commande (30) pour ce dispositif de freinage (11, 18), un capteur de surcharge (29) qui détecte la situation de surcharge et émet un signal de surcharge, ainsi qu'un capteur de vitesse (31, 24) qui détermine une vitesse de la marchandise transportée et émet un signal de vitesse. En réponse au signal de surcharge, la commande (30) agit sur le dispositif de freinage (11, 18) pour que celui-ci bloque le dispositif transporteur et sécurise ainsi la marchandise transportée (16). En réponse à un signal de décharge ultérieur, la commande (30) débloque le dispositif transporteur (1) de sorte que ce dernier soit placé dans un état de décharge, par l'intermédiaire d'une charge exercée par la marchandise transportée (16), et l'action du dispositif de freinage (11, 18) sur le dispositif transporteur (1) est réglée d'après le signal de vitesse du capteur de vitesse (24, 31) de sorte que la marchandise transportée (16) soit placée en état de décharge avec une vitesse de déplacement sensiblement constante. L'invention concerne en outre un dispositif transporteur comprenant un tel ensemble de commande et de régulation, ainsi qu'un système de grue à conteneur équipé de deux dispositifs transporteurs comprenant un ensemble de commande et de régulation selon l'invention.

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