| 摘要 |
PROBLEM TO BE SOLVED: To widen an adjustable range of driving force in a pneumatic tool using compressed air as a power source.SOLUTION: A sleeve valve 41 vertically movable in a groove 70 like a main valve 40 is mounted to the outside of the main valve 40 inside the groove 70. A vertical position of the sleeve valve 41 is determined by a pressure of compressed air in a second air passage 10b. That is, the sleeve valve 41 rises by reaction force of a spring 72 when the pressure is low, and descends when the pressure is high. The sleeve valve 41 blocks flow of the air from the second air passage 10b to a cylindrical intake port 20b when the pressure of the compressed air in the second air passage 10b is low, but does not block the flow of the air from the second air passage 10b to the cylindrical intake port 20b when the pressure of the compressed air in the second air passage 10b is high. |
