| 摘要 |
An elongated threshold extends under a swinging door and defines an upwardly facing and longitudinally extending cavity which receives a vertically adjustable rail member. The rail member has longitudinally spaced pre-assembled adjustment screw units each of which includes a tubular bushing having a press-fit connection with the rail member. Each bushing supports the shank portion of rotatable screw having a head portion with a recess for receiving an adjustment tool. Each screw is retained within its corresponding bushing by a washer having a press-fit on the screw which threads into an inverted T-nut seated within a slot within the threshold.
|
