| 摘要 |
PROBLEM TO BE SOLVED: To allow a guide roller for hangingly supporting a door body to smoothly roll along a guide rail and to pass through a corner where guide rails intersect orthogonally. SOLUTION: The guide roller 24 is formed of a pair of rollers with different diameters by arranging a cylindrical small diameter roller 24b fitted with a pivot, and a large diameter roller 24a at the tip of the pivot, in two upper and lower stages. The small diameter roller 24b is brought into contact with one end of an opening groove 13 of the guide rail 1, and the large diameter roller 24a is brought into contact with an inclined face of a facing projecting piece 14 on one side of the guide rail 1, respectively in a front-rear reverse manner in the width direction to carry out rolling guide at two upper and lower parts of the guide rail 1. Since the guide roller 24 is horizontally rotated in the horizontally arranged state, frictional resistance between itself and the guide rail 1 is small to attain smooth rolling guide. Further, since the guide roller 24 can change its direction by its turning advance, it can smoothly pass through the corner where the guide rails intersect orthogonally. COPYRIGHT: (C)2010,JPO&INPIT
|
