Abstract: A cushion body extends in a first direction, in a second direction and in third direction that is orthogonal to the first direction and the second direction. Protrusions are arranged in the first direction and in the second direction. A first slit extends in the first direction adjacent to a protrusion group, and additionally extends into the cushion body in the third direction. A second slit extends in the second direction adjacent to the protrusion group, and additionally extends into the cushion body in the third direction.

Abstract: A bedding supporting floor is supported on a stationary frame supported on a base having castors through a lifting device so that the bedding supporting floor is oscillated about an oscillation shaft provided on a center axis thereof, and an oscillation device for oscillating the bedding supporting floor with respect to the stationary frame is provided. A plate-like bearing member having a circular arc edge provided on a head portion and a foot portion of the bedding supporting floor is placed on a pair of rolls supported on the stationary frame.