| 摘要 |
An industrial door includes a roll-up door panel (8) that is movable between an open position and a closed position in which the door panel closes a doorway. A flexible beam (19) is attached to the lower edge of the door panel (8) and the beam is composed of superimposed strips (22) of resilient material, such as rubber, with flexible metal strips disposed between adjacent resilient strips (22). Each end of the beam is provided with a longitudinal open-ended slot and an extension (26) of a guide member (18) is mounted within each slot in a manner such that the extension can slide in the slots (21) in a direction parallel to the plane of the door panel and will be released from the slots if the beam is subjected to a substantial accidental impact. <IMAGE> |
