| 摘要 |
A damper device that uses viscous fluid comprises a cylindrical member having a cylindrical inner surface, a shaft being arranged inside the cylindrical member to face the inner surface in the radial direction, an outer circumferential surface of the shaft and the inner surface of the cylindrical member forming a space for a viscous fluid to be injected, a partition wall formed at the cylindrical member to project toward the space, wings being provided on the shaft for pressurizing the viscous fluid and check valves associated with the wings. The shaft has a flange portion having a diameter larger than that of a shaft portion of the shaft and also having a first viscous fluid pressure surface for the viscous fluid. The cylindrical member has a second viscous fluid pressure surface for the viscous fluid, a small opening having the same diameter as that of the shaft portion and a large opening having the same diameter as that of the flange portion and a first sealing member provided between the shaft portion and the small opening and a second sealing member provided between the flange portion and the large opening to seal the viscous fluid.
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