| 摘要 |
PURPOSE:To accelerate differential responsiveness and simplify a structure by providing a solenoid control valve on an air pipe path connected from an air tank to an air cylinder, and providing a solenoid control valve on a branch pipe path communicated to the atmospheric air. CONSTITUTION:The first solenoid control valve 52 is provided on an air pipe path 51 connected from an air tank 50 to an air cylinder 27. A branch pipe path 53 communicated to the atmospheric air is provided on the air pipe path 51 beyond the first solenoid control valve 52. The second solenoid valve 54 is arranged on this branch pipe path 53. A controller 55 controls the first and second solenoid control valves 52 and 54 via a manual switch and the car speed signal so that the air operating pressure fed to the air cylinder 27 is changed from the high pressure to the low pressure in a low-speed area when the manual switch is turned on. It controls them so that the air operating pressure is changed from the low pressure to the high pressure in proportion to the car speed when the manual switch is turned off. Differential responsiveness is accelerated, and the structure can be simplified.
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