| 摘要 |
A door structure comprises: a first plate with an opening enclosed by a peripheral edge; and a door connected to this first plate by a hinge construction; which first plate carries a number of clamps which are simultaneously rotatable by an operating mechanism with an operating handle and through rotation can co-act with the peripheral surfaces of corresponding non-round continuous holes in the door, which peripheral surfaces have for each clamp a contact surface inclining relative to the main plane of the door structure, which continuous holes have a form such that a clamp can pass therethrough; and has the characteristic that the peripheral edge is deformable under the influence of an air pressure pulse acting on the door structure in the closed position such that at least the door can be pressed out of the main plane it occupies when at rest while maintaining the sealing co-action between the framework and the peripheral edge, and the mechanical integrity of the door structure.
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