CALIPER BRAKE DEVICE

PROBLEM TO BE SOLVED: To provide a caliper brake device having improved mechanical efficiency of converting fluid pressure into brake block pushing force and stabilized mechanical efficiency, namely, stabilized braking force for developing the original braking force of a brake block. SOLUTION: The caliper brake device includes an anchor pin 43 supporting a support plate 8 on a caliper body 10 movably forward and backward relative to a disc 6, and an actuator 60 for pushing the brake block 7 against the disc 6. The actuator 60 includes an elastic membrane 75 mounted on the caliper body 10, a driving pressure chamber 63 defined by the elastic membrane 75 and into which fluid pressure (air pressure) is supplied during braking operation, a piston 65 mounted between the elastic membrane 75 and the brake block 7, and a joining means for joining the piston 65 pressed into the supported plate 8. With the fluid pressure (the air pressure) guided into the driving pressure chamber 63 during braking operation, the elastic membrane 75 is swollen to make the piston 65 push the brake block 7 against the disc 6. COPYRIGHT: (C)2011,JPO&INPIT