| 摘要 |
PURPOSE:To keep a movable wheel at an optimum turning angle by inserting a pin of a solenoid valve into a retaining hole of a turning member during turning. CONSTITUTION:In a driving device of a movable wheel, a limit switch 16 is attached to a fixed member 15 and a striker 14 is disposed in such a way to power the limit switch 16 at the optimum angle of a temporal turning of the movalbe wheel. A solenoid valve 17 is fit to the fixed member 15 and a pin 18 of the valve is slidably supported by a slidemental bearing 20 which is inserted through a bracket 19. On the other hand, a retaining hole 20 is made in a spur gear 10 and when the limit switch 16 is powdered, the solenoid valve 17 is activated, causing the pin 18 to slide on the slide metal bearing 20 to come in the retaining hole 20. Thereby, when the movable wheel is temporally turned to the optimum angle, the switch 16 is powdered and the pin 18 of the solenoid valve 17 falls in the hole 20 to keep a tyre of the wheel at the optimum angle. |
