| 摘要 |
PURPOSE:To make possible ventilation without sudden inflow of outside air by providing air conducting means cooperating with a curtain wall material on both sides of sheet cover in a ventilation device made by covering with sheet cover framing pipes used for such as henhouses. CONSTITUTION:A sheet cover 14 covers framing consisting of an arch shaped pipe 11 and a crossing straight pipe 13. The end 16 of sheet cover 14 is fixed by anchor rope 17 on a sheet pulling member 15 fixed on a floor surface. Both ends of the sheet cover 14 placed gradually apart from the pipe 11 forming a pendent part 18, the end of which is fixed at a certain level above the floor surface 12 providing an vacant part 19. A side wall sheet 21 is fixed on a plate 20 provided inside the pendent part 18. Between the side wall sheet and the sheet cover 14, a gap is formed at the top by air pressure from outside. |
