Damper device

A damper device comprising:

• an input element to which a torque from an engine is transmitted,
• an output element,
• an elastic body configured to transmit a torque between the input element and the output element, and
• a rotary inertia mass damper comprising a planetary gear that includes a sun gear configured to rotate integrally with one element of the input element and the output element, a carrier that rotatably supports a plurality of pinion gears and is configured to rotate integrally with the other element of the input element and the output element, and a ring gear that meshes with the plurality of pinion gears and works as a mass body, wherein
• the other element includes two plate members that are opposed to each other and coupled with each other by a plurality of rivets between the pinion gears,
• the two plate members have an identical shape,
• the other element is the input element,
• a plurality of supporting portions that rotatably support the plurality of pinion gears are in an outer circumference portion of each of the two plate members,
• a first hole that supports the pinion gear, a plurality of second holes for fastening by the rivets, and a plurality of third holes for a tool are in each of the plurality of supporting portions on a same circumference as the plurality of pinion gears viewed along a central axis of the damper device,
• the plurality of second holes are aligned with each other and at least portions of the plurality of third holes are aligned with each other when the two plate members are opposed to each other in a manner that the first holes are aligned with each other, and
• pinion shafts are inserted into the pinion gears and fastened by the plurality of rivets on both sides of each of the pinion shafts.