| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pressure regulating valve for change-over valve which has a simple constitution of a flow passage and a little in decrease in flow passage sectional area, and can be reduced in size. SOLUTION: The pressure regulating valve 1 is equipped with a valve box 15, a flow passage member in the valve box, supply passages 24a and 24b which link the supply port 5 of a base 2 to the output port P of a change-over valve 3 through a valve hole 22 formed in the flow passage member, output passages 19a and 19b and discharge passages 20a and 20b which link output ports 7A and 7B and discharge ports 6A and 6B of a base between the valve box and the flow passage member to output ports A and B and discharge ports EA and EB of the switching valve, a pressure control part 18 at one end of the valve box and a return chamber 52 where a return spring 53 at another end is reduced and provided. A valve rod 23 which is inserted by providing a flow passage gap in the valve hole 22 is provided with a 1st valve body 29 which cuts off the supply passage, a pressure regulating passage 26 which is opened on the return chamber side, a supply hole 33 which links the supply passage to the pressure regulating passage and a 1st seal member 30 which seals the flow passage gap on the return chamber side from the 1st valve body so that an air pressure of the supply port P of the change-over valve 3 is controlled with set pressing force of a pressure regulating spring 41 of the pressure control part 18.</p> |
