WINDOW OPENING AND CLOSING MECHANISM OF HOUSE FOR AGRICULTURE

摘要

PROBLEM TO BE SOLVED: To enable opening and closing of a skylight without using a motor, and to enable opening and closing of a skylight with an inexpensive structure.SOLUTION: Since a pulling coil spring shorter than the height size of a pushup arm is stretched between the ceiling of a house and the bottom or lower end of the pushup arm, the skylight is opened by the spring force of the short pulling coil spring, only when the pushup arm for pushing and opening the skylight is released from an operation rope and is free. Since the bottom of the pulling coil spring is pulled together with the bottom of the pushup arm by the operation rope when the operation rope is pulled, the skylight is closed and simultaneously the pulling coil spring is stretched.SELECTED DRAWING: Figure 5