To prevent the wear of an air-tight member, and to improve the safety by setting the distance from the center of the axis of a pivot hinge to a closely attached part to the air-tight member provided on a longitudinal frame to the prescribed value, and curving the surface of a hanging end part to the prescribed shape.
A hinge door is opened/closed around the axis of a pivot hinge provided above and below a hanging end part 2. The surface of the end part 2 is curved following the curve whose curvature is gradually reduced from the point B on the surface located on the line passing through the center O of the axis of the pivot hinge and parallel to the surface of the hinged door to the point A of a closely attached part to an air-tight member 5 so that a finger is not caught between the end part 2 and a longitudinal frame 6. The distance L1 from the center O to the point A is larger than the distance L2 from the center O to the point B. When the door is closed, the point B passes the part closer to the center O than the air-tight member 5 forming an arc with its center at the point O and the radius L2, and the point A forms an arc with its center at the point O and the radius L1, and is intersected with the outer circumference of the air-tight member 5, and the air-tight member 5 is closely attached to the end part 2 only in the closed condition of the door to prevent the wear.
MORIYA MASAAKI
SATO TADASHI
SHINOHARA KAZUO
KOBASHI FUJIYA
TETSUYA KOGYO KK
NOHARA EKUJIN KK