FIELD: construction.
SUBSTANCE: extended football field of indoor stadium comprises grass coat fixed on flexible substrate and arranged on box, with the possibility of its displacement relative to rigid flat base. Box is shaped as platform and is equipped with roller supports with the possibility of their interaction with guides of both parts of base, which are oriented in direction that is longitudinal to base. Along box perimeter there are elastic aprons fixed with the possibility of their interaction with base and sealing of space between box and base, which is arranged with holes, which are arranged along base length with identical pitch. Holes are connected by pipelines with adjustable gate valves with source of compressed air. Box with the help of traction ropes is kinematically connected to each of its end with two brake-equipped hoists, installed at both sides of base and with alignment of traction ropes along base length. At outer edges of base there are spring-loaded supports fixed with the possibility of their interaction with end edges of box. Between platform and roller supports of box there are gaskets made of elastic material.
EFFECT: simplified mechanism of movement and reduced labour intensiveness and time required to do operations of football field extension and returning in initial position.
1 cl, 5 dwg
