| 摘要 |
The device has two plates (3, 9), where the plate (3) is fixed to a casement of a door and the plate (9) has a wheel housed in a lower guiding rail of the door. The plate (3) is axially moved along with a door panel with respect to the plate (9). The plates have retention units (5, 6, 11, 12) cooperating with each other to maintain the plates in contact with each other, when the plate (3) is moved axially in the direction of the rail. |
