Disc brake device for railway vehicle

A disc brake device for a railway vehicle, the disc brake device comprising:

• a rotary member to be attached to an axle of the railway vehicle;
• a brake disc including a disc body having an annular shape and a plurality of fins, the disc body having a rear surface that faces the rotary member, the plurality of fins being disposed on the rear surface in a radial shape;
• and
• a control member configured to control an airflow rate between, of the plurality of fins, fins disposed adjacent to each other in a circumferential direction of the brake disc, the control member including a base plate sandwiched between the rotary member and the plurality of fins and a protruding portion protruding from the base plate toward the disc body, wherein
• a top surface of each of the fins disposed adjacent to each other has a recessed portion that crosses the fin in the circumferential direction,
• the protruding portion extends in the circumferential direction through from the recessed portion of one of the fins disposed adjacent to each other to the recessed portion of the other of the fins,
• the protruding portion is positioned on an inner side in a radial direction of the brake disc, and the recessed portion is open to the radially inner side of the brake disc.