Clutch device

A clutch device for coupling two rotating bodies provided to be opposite each other almost concentrically so as to be synchronously rotatable when rotational power is inputted into a first rotating body out of the two rotating bodies, and for cutting off rotational power to the first rotating body when the rotational power is inputted into a second rotating body out of the two rotating bodies, the clutch device comprising:

• a movable frictional member rotatable synchronously with the second rotating body, and attached to be displaceable in an axial direction;
• a fixed frictional member fixedly arranged at a position at which the movable frictional member is press-contacted with or separated from the fixed frictional member depending on a displacement of the movable frictional member in the axial direction;
• and
• a cam mechanism for separating the movable frictional member from the fixed frictional member, integrating the first rotating body, the movable frictional member and the second rotating body with one another and coupling the first and second rotating bodies to be synchronously rotatable when the first rotating body rotates, and for press-contacting the movable frictional member with the fixed frictional member, integrating the second rotating body, the movable frictional member and the fixed frictional member with one another and turning the second rotating body into an irrotational state when the second rotating body rotates.