Brake device

A brake device, which is configured to perform braking and releasing of a disc by moving a rod having a lining at a leading end of the rod by a spring device, the brake device comprising:

• a pressure storage unit configured to store a compressed fluid;
• and
• a pressure control unit comprising a pressure-receiving piston mounted to the rod in a cylinder tube arranged in direct contact with the pressure storage unit,
• the pressure control unit comprising a first inflow/outflow port, a second inflow/outflow port, a first control valve configured to control opening and closing of the first inflow/outflow port, and a second control valve configured to control opening and closing of the second inflow/outflow port,
• wherein, when the disc is to be released, the first control valve is opened and the second control valve is closed to cause the compressed fluid in the pressure storage unit to pass through the first inflow/outflow port to flow into the pressure control unit, to thereby move the pressure-receiving piston to a position for the releasing, and
• wherein, when the disc is to be braked, the first control valve is closed and the second control valve is opened to cause the compressed fluid that has flowed into the pressure control unit to pass through the second inflow/outflow port to be released to an atmosphere, to thereby return the pressure-receiving piston to a position for the braking.