Brake device for an elevator car, use thereof in an elevator system, and method

A braking apparatus for braking a displaceable elevator car of an elevator system and for measuring load changes caused in the elevator car, the braking apparatus comprising:

• a brake adapted to brake the elevator car relative to a stationary component of the elevator system;
• a brake holding arrangement adapted to hold the brake on the elevator car;
• a load measuring device with a force transmission element, the load measuring device adapted to measure a force acting on the force transmission element;
• a load measuring device holding arrangement adapted to hold the load measuring device on the elevator car;
• wherein when the brake is held on the elevator car by the brake holding arrangement the brake is displaceable relative to the elevator car in a force direction of a force generated by the brake when the brake holds the elevator car on the stationary component;
• wherein when the load measuring device is held on the elevator car by the load measuring device holding arrangement the load measuring device is fixed relative to the elevator car in the force direction;
• wherein the force transmission element is operatively connected to the brake such that the load measuring device measures a force acting between the brake and the load measuring device due to a displacement of the brake relative to the load measuring device;
• and
• wherein the load measuring device holding arrangement is connected to the brake holding arrangement such that the force measured by the load measuring device acts perpendicular to the force direction.