| 摘要 |
PROBLEM TO BE SOLVED: To provide a gate capable of controlling a small discharge in order to eliminate the frequent repetitions of the adjustments with small openings for a gate door body thereby making the troublesome work unnecessary. SOLUTION: At a bottom end portion of the central part of a door body 5, the width dimension w of is set to a sufficiently smaller value than the width dimension W of the discharge opening portion, and the height h from the bottom end face of the door body 5 is set almost to the value equal to the width dimension w for a small square-shaped opening portion 10 penetrated. The top end of this small opening portion 10, at the full closing of the door body 5, is located below the bottom end surface of a discharge opening portion 3, that is, it is located below the top end surface of the bottom edge portion 4A of a frame- shaped door stop 4.
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