| 摘要 |
FIELD: agriculture, sports and household activities, may be used for year-round protection of soil on agricultural plots, football and other sportive fields. ^ SUBSTANCE: construction has underground ferroconcrete shed with side and end covers, and metal carcass movably mounted on supporting rails extending lengthwise of shed. Carcass is formed from columns consisting of lower and upper parts pivotally connected with one another. Upper parts of columns are connected with one another through pivotal tie-rods. Arcuate floor structures designed for connecting opposite columns with one another are made in the form of two arcs, that is, upper and lower arcs, with fabric covering fixed to floors. Construction is further furnished with side walls of fabric covering or metal extendable carcasses which are lifted by means of electric winches with cables, said winches being mounted on columns. For removal, construction is equipped with electric winches having cables extending through all columns, beginning from the outer ones, and for lifting, construction is equipped with electric winches having cables for tightening of column upper parts. Columns are provided with stops, end switches and supporting wheels. Construction has supporting rails positioned in shed, within longitudinal part of construction. ^ EFFECT: provision for crating favorable conditions for growing of farm crops and year-round keeping of beds on football and other fields. ^ 5 dwg |
