| 摘要 |
<p>The invention relates to a rolling door, comprising a vertically displaceable curtain element for closing an opening in a wall, with guiding cams provided at side edges of the curtain element and guides to be attached to the wall for guiding the guiding cams thereinbetween, wherein the curtain element comprises a main surface situated between the guiding cams to which a protection element is coupled capable of hinging with respect to the main surface, which protection element comprises the guiding cam. The invention is characterized in that the protection element is coupled to the main surface with an adjustable spring pre-tension.
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