| 摘要 |
PROBLEM TO BE SOLVED: To provide a wind pressure malfunctioning stop prevention device capable of preventing the malfunctioning stop of an electric motor 5 by the cause of wind pressure F. SOLUTION: When the actual number of revolutions of an electric motor 5 with the opening and shutting motion of a slat curtain 6 is within the scope of non-stop conditions based on wind pressure F, a movable control signal to the electric motor 5 is maintained so as to continue the opening and shutting motion of the slat curtain 6 as variations by wind pressure F, and when it is not within the scope of the non-stop conditions, a stop control signal is transmitted to the electric motor 5 so as to stop the opening and shutting motion of the slat curtain 6. When the actual number of revolutions of the electric motor 5 are in excess of the previous learning number of revolutions to reach the comparison number of revolutions setting the learning number of revolutions in reference, the non-stop condition scope is the detection scope before the actual number of revolutions reache the comparison number of revolutions, and the scope is set in accordance with fluctuating characteristic described by the actual number of revolutions for the learning number of revolutions or the comparison number of revolutions. The fluctuating characteristic is the characteristic regarding the number of revolutions that the actual number of revolutions exceed the learning number of revolutions and that the actual number of revolutions do not exceed the learing number of revolutions.
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