Patent ID: 8511653

Claim:
An air spring, comprising: an upper face plate; a lower face plate; a tubular flexible member that is interposed between the upper face plate and the lower face plate; a deflation stopper section that is provided and protrudes upward from the lower face plate, and that supports the upper face plate at a time of deflation; and a concave section that is formed in a center part of an undersurface of the upper face plate, and that sits in the deflation stopper section at a time of deflation; wherein: the diameter of the concave section is larger than the external diameter of the deflation stopper section and is configured so that a relative horizontal displacement is possible between the upper face plate and the lower face plate at a time of deflation; an upper end of the flexible member is attached to the upper face plate at a position that is located further on the radially outer side than the concave section; a lower end of the flexible member is attached to the lower face plate at a position that is located further on the radially outer side than the deflation stopper section; the deflation stopper section is formed so as to have a height such that the upper end and the lower end of the flexible member do not contact as a result of a relative displacement in a horizontal direction between the upper face plate and the lower face plate at a time of deflation; the relative displacement in a horizontal direction between the upper face plate and the lower face plate is regulated by a side face of the deflation stopper section contacting an inner circumferential face of the concave section; and a buffer layer is arranged at least at one face among the inner circumferential face of the concave section and the side face of the deflation stopper section that opposes the inner circumferential face of the concave section at a time of deflation.