| 摘要 |
PROBLEM TO BE SOLVED: To provide a hop-up type opening/closing gate door which is operated automatically, can manage with a small number of component parts, and whose space for accommodating a motor, etc., remains small. SOLUTION: A motor 8 is installed in a column 10, and a normal/reverse rotation changeover mechanism for reciprocating motions having a reciprocator 83 to make reciprocation with the regular and reverse operation of the motor 8 is installed between the motor 8 and the base end of the first arm. When the motor 8 is operated in the regular and reverse directions, the reciprocator 83 makes reciprocation, and a door is rotated for opening and shutting with the normal and reverse rotations of the first arm. This allows managing with a smaller accommodating space for the drive mechanism including motor than a conventional automatic hop-up type gate door in which a long stretching elevating/sinking member is elevated and sunk. Because the drive mechanism consists of the motor 8 and the normal/reverse rotation changeover mechanism having reciprocator 83, this can manage with a smaller number of component parts in use than the conventional gate door arrangement. |
