SPHERICAL SLIDING BEARING

To provide a spherical sliding bearing with improved seismic isolation effect.SOLUTION: A spherical sliding bearing to be disposed between a lower structure L and an upper structure U comprises a spherical seat part 20, a slider part S, and an upper shoe 10. The slider part S comprises: a first slider part 40 disposed in an upper part of the spherical seat part 20 and including a first convex spherical surface 40p; a second slider part 50 disposed in an upper part of the first slider part 40 and including a second concave spherical surface 50d facing downward, the second concave spherical surface 50d sliding on the first convex spherical surface 40p. A coefficient of friction of a lower concave spherical surface 40d, a coefficient of friction of the second concave spherical surface 50d and a coefficient of friction of an upper shoe concave spherical surface 10d are such that the coefficients of friction increase in the order of the lower concave spherical surface 40d, the second concave spherical surface 50d, and the upper shoe concave spherical surface 10d.SELECTED DRAWING: Figure 2 【課題】免震効果を向上させた球面滑り支承を提供する。【解決手段】下部構造体Ｌと上部構造体Ｕとの間に設置される球面滑り支承であって、球座部２０と、スライダー部Ｓと、上沓１０と、を備え、スライダー部Ｓは、球座部２０の上部に配置され、第１凸球面４０ｐを備える第１スライダー部４０と、第１スライダー部４０の上部に設置され、且つ、下方に面する第２凹球面５０ｄであって第１凸球面４０ｐと摺動する第２凹球面５０ｄを備える第２スライダー部５０と、を備え、下凹球面４０ｄの摩擦係数と、第２凹球面５０ｄの摩擦係数と、上沓凹球面１０ｄの摩擦係数と、は、下凹球面４０ｄの摩擦係数、第２凹球面５０ｄの摩擦係数、上沓凹球面１０ｄの摩擦係数の順に、大きくなることを特徴とする。【選択図】図２