| 摘要 |
The invention relates to a foldable door which includes a peripheral frame 1 and a flexible closure sheet 2; the upper end of the sheet is suspended from straps 3 actuated by a shaft 5 which, upon rotation, gives rise to the opening or closing of the door via its upper zone. The sheet 2 includes reinforcement crosspieces which are distanced from one another and which are guided in the vertical uprights of the frame 1; the lower crosspiece 8, mounted on the sheet 2, is composed of a flexible bar, and the alternate crosspieces 10 and 12, included between the upper 2a and lower 2b ends of the sheet, are suspended from straps 13 and 14, by means of re-entrant devices or directly, which, when actuated by a motorized shaft 16, give rise to the simultaneous vertical displacement at different speeds of said alternate crosspieces 10 and 12. <IMAGE>
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