| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller for a self-closing structure, which secures a strength of a door and a space for the operation. SOLUTION: In this structure, a horizontal cross section of an upper pin of a door on one side of the door for supporting the door has one linear side only in the direction to one-side-edge of the door, while other sides are circular. An upper receiving hole 7 into which the upper pin is inserted also has one linear side only in the direction to the one-side-edge of the door and is shaped in a hole so as to be rotatable with the upper pin kept inserted. By supporting the door to the one side of the door, linear portions of both the upper pin and the upper receiving hole 7 are forced to be aligned with each other through gravity of the door. A lower pin as well as a lower receiving hole for receiving the lower pin have a circular horizontal cross sections with its end shaped in a smooth projection having less resistance, so as to support vertical gravity of the door to rotatably be held. The linear part of the upper receiving hole also is made into the one using a magnet 9, thereby strengthening self-closing and stopping forces not only by the shape but also by suction/absorption powers of the magnet 9. COPYRIGHT: (C)2011,JPO&INPIT
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