| 摘要 |
<p>A brake device ( 1 ) is for use with a cable-operated door ( 3 ), such as garage doors ( 3 ) and the like. The device ( 1 ) is intended to reduce the risk of the door ( 3 ) falling, or at the very least slow down its descent, in the event of a failure in the counterbalancing mechanism of the door ( 3 ), which is generally represented by a loss of tension in a given tensioned cable ( 5 ) operating the door ( 3 ). The brake device ( 1 ) includes a support bracket ( 9 ), and a guiding assembly ( 15 ) and a braking assembly ( 17 ) mounted onto the support bracket ( 9 ). The braking assembly includes a swivel component ( 18 ) having a braking arm ( 19 ) and a lever portion ( 20 ), the lever portion cooperating with the tensioned cable ( 3 ) so that in the event of the loss of tension in the cable ( 5 ), the braking arm ( 19 ) is urged onto an adjacent rail ( 7 ) via a biasing spring ( 21 ) for anchoring a knife ( 45 ) of the braking arm ( 19 ) into the rail ( 7 ) and stopping, or at the very least, slowing down the descent of the door ( 3 ), with respect to the rail ( 7 ).</p> |
