Industrial door system responsive to an impact

E - Fixed Constructions – 06 – B

Patent

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E06B 9/58 (2006.01) E05F 15/00 (2006.01) E06B 9/13 (2006.01) E06B 9/80 (2006.01)

Patent

CA 2365796

An impact sensing system for a powered roll-up door combines an electrical switch and a breakaway coupling. To avoid damage or injury resulting from the door's roll-up curtain accidentally closing upon an obstacle or something striking the curtain, the breakaway coupling responds to such a collision by breaking away, which releases a lower portion of the curtain from between its two vertical guide tracks. Each breakaway coupling includes a set of electrical contacts that make or break in response to the coupling breaking away. When the curtain's lower portion becomes effectively derailed from its guide track, the electrical contacts disable continued operation of the door to prevent the door's drive motor from jamming the curtain. In some embodiments, the breakaway coupling is releasably held together by way of magnetic attraction between two coupling segments, with one electrical contact on each segment to comprise one set of functional contacts.

L'invention concerne un système de détection de choc destiné à une porte-rideau, le système combinant un commutateur électrique et un raccord cassable. Pour éviter des dégâts causés par la fermeture accidentelle du rideau de la porte-rideau sur un obstacle ou le choc d'un objet contre le rideau, le raccord cassable réagit à la collision en se cassant, ce qui libère une partie inférieure du rideau se trouvant entre les deux glissières verticales. Chaque raccord cassable comprend une série de contacts électriques qui se ferment ou s'ouvrent en réponse à la cassure du raccord. Lorsque la partie inférieure du rideau déraille effectivement en sortant des glissières, les contacts électriques désactivent le fonctionnement de la porte pour empêcher le moteur d'entraînement de la porte de coincer le rideau. Dans certains modes de réalisation, le raccord cassable est maintenu libérable grâce à une attraction magnétique entre deux segments de raccordement, un contact électrique sur chaque segment contenant un ensemble de contacts fonctionnels.

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