| 摘要 |
<p>The invention relates to a mechanically assembled trough for catching rain water. According to the invention, the trough consists of some identical trough elements made of semi-cylindrical sheet metal, having longitudinal edges flared and provided with stiffening elements, assembled by overlapping the adjacent ends, where each trough element (A, A') has a longitudinal margin flared in the shape of an open cylinder (c , c'), with variable radius, similar to Archimedes' spiral, and, a longitudinal margin bent inwards, to about 90A in relation to the flat surface of the sheet metal, forming a frame (R) on which there are machined some indentations for forming fin-shaped stiffening elements (n 1, 2, 3, 4, 5), located close to the ends thereof. According to the invention, the trough has as advantages the considerable lowering of the execution and assembling time as well as the elimination of qualified staff required for carrying out the trough elements.</p> |
