| 摘要 |
PURPOSE:To surely operate the subject device with a simple structure by installing one edge of a driving spring onto one between a sliding door and a door frame and installing a driving drum onto the other and installing a speed governor. CONSTITUTION:One edge of a driving spring 1 is installed onto one between a sliding door 16 and a shutter box 3, and a driving drum 6 is installed onto the other, and a rack rod 17 is installed onto one, and a speed governor 15 is installed onto the other. When the sliding door 16 is opened, the driving spring 1 is pulled out in straight line form from the driving drum 6, add stores the energy in closing the sliding door 16. Though, at the same time, the rack rod 17 and the pinion 14 of the speed governor 15 relatively shift, the action as brake for the sliding door 16 is suppressed by the action of a unidirectional clutch built in the speed governor 15. When the sliding door 16 is closed, the sliding door 16 performs an equal speed movement by the restoration force of the driving spring 1 and the action of the speed governor 16, and a closed state is generated free from shock. |
