| 摘要 |
PROBLEM TO BE SOLVED: To suppress the generation of hammering and noise caused by the abutment of a piston and a stopper part.SOLUTION: Two regulators 8, 9 comprise pistons 52, 72 for partitioning the inside of cylinders 51, 71 formed at a casing 41 into pressure regulation chambers 58, 77 and atmosphere chambers 68, 88. Stopper parts for regulating movable ranges of the pistons 52, 72 are arranged at the cylinders, respectively, and valve-opening springs 57, 74 for energizing the pistons toward the pressure regulation chambers are arranged at the atmosphere chambers, respectively. Valve seats 55, 73 and valve bodies 53, 72a are arranged in order to open and close passages communicating with the pressure regulation chambers. The pressure of the pressure regulation chambers is adjusted by opening and closing the valve bodies by the movement of the pistons by the balance of the pressure of the pressure regulation chambers and energization forces of the valve-opening springs. Buffer members 65, 85 are arranged between the pistons and the stopper parts.SELECTED DRAWING: Figure 2 |
