| 摘要 |
<p>An automatic door closing hinge configured to absorb a shock by an air damper which can be installed on a double swing door opening inward and outward and a double swing door structure provided with the automatic door closing hinge are provided. An automatic door closing hinge 1 is configured in such a manner that balls 43 are engaged with a cam groove 35 formed on an outer peripheral surface of an operating rod in a cylinder 2 at opposed positions so as to have a substantially V-shape continuing in a circular shape at opposed positions thereof, the balls 43 are engaged with a compression ring 4 urged downward by a restraining force of a compression coil spring 5, the movement of the balls 43 with respect to the cam groove 35 is in conjunction with the vertical movement of the compression ring 4, balls 65 are engaged with a cam groove 36 being formed under the cam groove 35 and having substantially the same shape as the cam groove 35 at opposed positions thereof, the balls 65 are engaged with the piston 6, the movement of the balls 65 with respect to the cam groove 36 is in conjunction with the vertical movement of the piston 6, and air on the lower side of the piston 6 in the cylinder 2 is gradually flowed out according to the downward movement of the piston 6.</p> |
