The parking brake device in the caliper brake system for a railway vehicle

Size of the parking brake system, simplified. A parking brake system to be installed on the rod protruding side of the brake cylinder of the cylinder (1) of the caliper brake device. In the second cylinder (11) connecting the cylinder coaxially, the rod (3) and coaxially disposed relative movably second piston (12). Providing a one-way clutch (14) for turning on and off by pressing release-pressing by the second piston to the switch (13) disposed relative the cylinder side surface of the second piston. While installing the parking operation auxiliary spring (15) into the space (11c) of the cylinder side in the second cylinder, installing the manual release piston (16) in a space (11b) of the counter-cylinder side. Manual manual release rod to the tip of the second cylinder release piston (17) is fixed, the parking release lever to push the second piston in the retreating direction of the rod in synchronization with the pushing of the retreating direction of the rod of the manual release rod providing (18).