| 摘要 |
Provided is an inner ring which, even when pressed into a tube at an angle, prevents fluids from seeping between the tube and the inner ring. On the leading end of an expanded portion (3f) formed on the outer periphery (3G) of the inner ring main body (3A) press-fitted into the resin tube (4), a tapered outer peripheral expanded surface (3a) is formed which deformably expands the tube end (4C) when press-fitted therein, and the cross-sectional shape of the outer peripheral expanded surface (3a) in the direction along the axis (P) of the inner ring main body (3A) is formed as a convex curve which passes through a first position (e1) which is the leading end at the maximum diameter position (3b) on the tube press-fitting side, a second position (e2) which is the leading end on the tube press-fitting side, and, between the first position (e1) and the second position (e2), a third position (e3) which has the same diameter as the outer diameter (D) of the tube (4) relative to the axis (P), wherein the angle α formed by the axis (P) and the tangent line (L) on the outer peripheral expanded surface (3a) at the third position (e3) is 30-60°. |
