| 摘要 |
PROBLEM TO BE SOLVED: To provide a brake cylinder device, capable of operating both of an ordinary brake and a spring brake as a parking brake and shortened in the axial length thereof. SOLUTION: A brake cylinder device 1 capable of operating both of an ordinary brake means 2 and a spring brake means 3 is provided with a clutch means 4 for connecting a rod 111 to a second piston 21 when the apply of the pressure fluid to a second working chamber 24 of the spring brake means 3 is stopped and a first piston 21 starts to work to a rod 111. This clutch means 4 is provided with a screw 31 provided in the rod 111, a nut member 32 provided in the second piston 21 freely to be rotated, and a stopper means 33 for stopping the rotation of the nut member 32 when the second piston 21 starts to move to the rod 111.
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