Nok Corporation

Masasuke Uchiyama

Tokunori Yanagi

Naoki Hagiwara

Yuki Nakagawa

Takuya Amano

Provided is a gasket mounting structure capable of preventing a gasket from being mounted in a wrong direction. The gasket mounting structure is configured such that, when a jigis inserted into a gasketfrom a large-diameter inner peripheral surface portionside, a small-diameter outer peripheral surface portionis press-fitted into an inner peripheral surface of a seal projectionto result in a state in which the gasketis held by the jigand, when the jigis inserted into the gasketfrom a small-diameter inner peripheral surface portionside, the small-diameter outer peripheral surface portiondoes not reach a position at which the small-diameter outer peripheral surface portioncan come into contact with the seal projection

Gasket mounting structure

A sealing device includes a reinforcing ring formed annularly around an axis and an elastic body part that is formed from an elastic body attached to the reinforcing ring and that is formed annularly around the axis. The reinforcing ring includes a tubular portion having a cylindrical shape around the axis and a flange projecting annularly from an outer end portion of the tubular portion to an inner periphery side. The elastic body part includes a lip portion that is an annular portion covering the flange from an outer side, projecting from the flange toward the outer side in a direction of the axis, and projecting toward the inner periphery side in a radial direction. The lip portion includes a seal lip portion that is an annular portion projecting toward the outer side in the direction of the axis and a secondary lip portion that is an annular portion projecting toward an inner side in the direction of the axis.

Sealing device

The invention provides a gasket having sealing lips in axial both ends of a gasket body in which a reinforcing ring is embedded. The gasket, has a structure in which the gasket body is displaced to the one axial side within the mounting groove when pressure acts on the gasket because the rigidity of a second sealing lip is set to be higher than the rigidity of a first sealing lip or a reinforcing ring is disposed closer to the one axial side within the gasket body. Furthermore, a seal bead which is brought into close contact to the bottom surface of the mounting groove when mounted is provided in the gasket body and a space portion surrounded by the second sealing lip, the seal bead, and the bottom surface and the other side surface of the mounting groove when mounted is provided.

Growing community of inventors

Shizuoka, Japan

Masasuke Uchiyama