| 摘要 |
A mechanical curtain, in particular for closing entrances in manufacturing shops and other rooms, consisting of: vertical columns, a top cross-bar linking the vertical columns in the shape of a gate, movable wings and a drive for the wings as per patent number 147058, characterized in that in the drive unit, springs (6) are located based on brackets (7) that are attached to the vertical columns, whereas in the final compression phase, the springs are compressed with retaining plates (5) attached to the drive ropes (1), whereas the attachment method allows the spring (6) operation to be adjusted.<IMAGE>
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