Abstract
Acceleration in various directions that occur during running of the ambulance adversely affects the sickness and wound people. Therefore, there is a need for devices to suppress the acceleration in front and back vertical direction. In order to prevent the progression of the disease and of the winding's disease, the study is aimed at the development of the acceleration reduction device corresponding to the bed of the ambulance. In particular, I describe the acceleration reduction in front and back direction. A Pendulum tilt chassis is used to reduce the acceleration in front-and-back direction. In addition, a variable friction damper is attached to it. The variable friction damper is a sliding friction mechanism utilizing the difference in adsorption force of the magnets. Because adsorption force is nothing when the magnet to slide over the non-magnetic material, sliding friction force is also reduced. Because adsorption force is strong that compared to the non-magnetic material when the magnet to slide over the magnetic material, sliding friction force is also increased. The results of the numerical analysis using the analysis model, it was confirmed that it can be kept to about half the acceleration.
