| 摘要 |
A frame of a door has a transversely extending upper frame member and a door is swingably mounted in the frame having an upper portion which is adjacent the frame member. A door-closing unit is accommodated in the frame member and has a shaft which projects downwardly towards the upper portion of the door and which is permanently biased for turning movement towards a rest position. Coupling means couples the shaft with the door so that the shaft is turned from its rest position in response to swinging of the door. The coupling means comprises a coupling member which extends along the upper portion of the door across the width of the latter, having one portion of greater height at one axial side of the shaft and an other portion of lesser height at the opposite axial side of the shaft. Connecting means connects the coupling member to the door so that it has limited freedom of displacement along the upper portion thereof, and displacing means is provided for effecting such displacement. A cross-head at least in part overlies the upper portion of the coupling member and has a height substantially corresponding to the difference between the greater and the lesser heights, and securing means secures the cross-head to the one portion of the door so that between this one portion and the cross-head the shaft is clamped against rotation relative to the door.
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