| 摘要 |
<p>The rail has a support with two parallel horizontal bars (8a,8b). The ends of inclined bars (6a,6b,7a,7b) are articulated to the ends of these by casings (9a,9b,10a,10b). The other ends of the inclined bars are joined and articulated to two parallel vertical uprights (1,2) by casings (11a,11b). A horizontal rail (3) is joined to the upper ends of the uprights by articulations (4,5). The casings are U-shaped and the angular movement of the inclined bars is limited by studs engaging in hollows. When the rail is folded up the inclined bars and the uprights are parallel to each other.</p> |
