Patent ID: 8197347

Claim:
A damper device inputting a rotational torque of a power source from an input side and outputting the rotational torque to an output side, the damper device comprising: a first plate member rotated when the rotational force is inputted thereto from the input side; a second plate member provided so as to be rotatable relative to the first plate member and outputting the rotational force to the output side by the second plate member being rotated in response to a rotation of the first plate member; a damper portion for absorbing a relative rotation between the first plate member and the second plate member; and a hysteresis portion for absorbing the relative rotation between the first plate member and the second plate member by using a friction force, wherein the hysteresis portion includes an intermediate member between the first plate member and the second plate member in a radial direction of the damper device, the intermediate member is pressed against one of the first plate member and the second plate member by means of the other one of the first plate member and the second plate member when the first plate member and the second plate member rotate relative to each other; wherein the intermediate member includes a protrusion at one of an inner circumferential surface and an outer circumferential surface thereof in the radial direction, the protrusion includes an end portion and a first tapered portion, which is formed at the protrusion in a circumferential direction of the damper device, the other one of the first plate member and the second plate member, which is provided so as to correspond to the protrusion, includes a second tapered portion, which corresponds to the first tapered portion of the intermediate member, and wherein the intermediate member is pressed against the one of the first plate member and the second plate member, which is provided so as to correspond to the other one of the inner circumferential surface and the outer circumferential surface of the intermediate member, in the radial direction by an interaction between the first tapered portion and the second tapered portion when the first plate member and the second plate member rotate relative to each other; and wherein an angle of the first tapered portion and an angle of the second tapered portion is set so as to be equal to or greater than 12 degrees but equal to or less than 60 degrees.