Grape profile with ventilation valve for greenhouses and similar buildings

摘要

Layout profile of light metal gutter for greenhouses and similar constructions composed of a vertical strip with a flange joined by molding at one end that receives the roof cover and inclined corresponding to the slope of the roof, in which in the angle formed by the strut and the flange, located outside in the greenhouse or similar, there is provided an articulation chamber for housing an articulation bolt of a through ventilation flap with a constriction provided between the articulation bolt and the ventilation blade, which it possesses a sufficient freedom of movement of an opening: of the articulation chamber directed towards the outside, characterized in that the articulation chamber. It is constituted of round circular shape and the hinge pin, as a semi-round profile, the angle between the lower edge of the chamber, articulation opening and the lower edge formed in the semi-round profile of the hinge pin being by the, transition from the circumference arc to the flattening as a segment, is greater than the angle formed between the surface, located upwards, of the narrowing joined by molding to the hinge pin and the upper edge of the opening of the chamber of articulation, and because the angle between the lower edge of the semi-round profile of the hinge pin. And the upper edge of the opening of the chamber, articulation is less than the angle enclosed by the circumferential arc of the semi-round profile. (Machine-translation by Google Translate, not legally binding)