Elevator hoisting machine braking apparatus

An elevator hoisting machine braking apparatus comprising:

• a rotating body that is rotated relative to a hoisting machine main body;
• a braking apparatus main body that comprises:
• a movable body;
• and
• an electromagnetic actuator that is mounted onto the hoisting machine main body, and that displaces the movable body in a direction of contact with and separation from the rotating body,
• wherein a slot that passes through the electromagnetic actuator in a direction that intersects a direction of displacement of the movable body is disposed on the electromagnetic actuator such that a major axis direction of the slot is oriented in a direction of displacement of the movable body;
• a mounting device that has a rod-shaped mounting member, and that mounts the electromagnetic actuator to the hoisting machine main body by the mounting member being passed through the slot and mounted to the hoisting machine main body;
• and
• an adjusting apparatus that has an adjusting member that is screwed into an adjusting threaded aperture that communicates between an internal portion of the slot and an external portion of the electromagnetic actuator, and that changes a distance between an inner surface of the slot and the adjusting member in a major axis direction of the slot by adjusting an amount of protrusion of the adjusting member into the slot,
• the elevator hoisting machine braking apparatus being characterized in that displacement of the electromagnetic actuator away from the rotating body is restricted by the adjusting member contacting the mounting member.