| 摘要 |
PURPOSE:To open only a little the door of a conference room or a theater, by automatically forcing to open the door, when the door is transferred to the position passed through the manually operating area, by detecting it and by forcing to manually open the door in the manually operating area. CONSTITUTION:A mode-changeover switch of an operating disk 19 is changed over to the automatic motion mode and the door 6 is set so as to be able to freely and manually open and close, when the door 6 is transferred to the position passed through the manually operating area L, the output signal detected by a position-sensor is transmitted from the comparison circuit to the motor- driving circuit to open the door by a linear motor 10. Next, when the door 6 reaches the fully opened position, the linear motor 10 is reversed to transfer to the closing direction. When the door 6 reaches the fully closed position, the linear motor halts and the door 6 also stops at the fully closed position X. |
