| 摘要 |
A security closure for covering an opening, e.g., a window, in a building includes a panel having a circumferential sidewall. A support member is securable to extend across the opening in fixed relation thereto, the support member being releasably securable to the interior of the panel away from one edge thereof by a releasable securing device. The support member is fixed at the one edge by a hinged fixing structure which allows the panel to pivot substantially along the one edge away from the opening when the support member is released from the releasable securing device. As a result, an emergency release of the panel can be accomplished.
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