| 摘要 |
<p>The guideway for the lateral bearings on a roller shutter consists of a shaped piece providing a run-in slot, with two guiding surfaces formed by guides, sloping and/or curved, together with a bearing surface across the slot, and a straight and/or curved guide surface for the shutter end, punched out on a third guide. One of the guides (3, 4, 5) is fitted with attenuators (12) which stand out away from the guide surface (3a, 4a) concerned; these may lie parallel to each other, and have straight or curved guiding edges, and are fanned out on the guide component. The noise level, as the roller shutter passes through, is considerably reduced.</p> |
