HINGED DOOR

Japanese Patent JP3467672

B2

PROBLEM TO BE SOLVED: To prevent wear of an airtight material in its early stages and prevent the danger of insertion of fingers by a method wherein the center of a circle forming the suspension side end surface of a door body and the center of a bearing recess are offset to reduce the contact distance between the door body and an airtight body and a gap between the door body and a door stop.
SOLUTION: A suspension side end surface 2C is formed into a semicircular shape, in plan view, having its center S on the bisector of the thickness of a door body 2, while the center O of a bearing recess is formed so as to be biased toward the side of the surface 2C with respect to the center S. And an inner surface 7a having radius of curvature larger than the radius of the circle S is formed on a surface of a vertical door frame 7 in opposition to the surface 2C, and a door stop 7b is formed so as to be opposed to a point slightly beyond the surface 2C, and an airtight material 8 which elastically contacts the surface 2C is vertically provided, in a fully closed state, at the forward end of the frame 7. If the door body is caused to swing about the center O offset from the center S of the surface 2C, the material 8 is separated from the surface 2C before the door body is partially opened so that wear of the material 8 can be reduced, and fingers are prevented from being inserted into a gap between the stop 7 and a surface 2d of the door body.

Shintaro Shimizu

JP33032596A

November 17, 2003

November 26, 1996

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Sanwa Shutter Co., Ltd.

E06B7/22; E05F7/00; (IPC1-7): E06B7/22; E05F7/00

JP828146A
JP1054183A
JP68683U

Tetsuo Hirose

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