| 摘要 |
In a door having a door wing guided so as to be longitudinally displaceable, at least the lower boom of the door wing being extended so as constantly to reach beyond one wing end and beyond the door aperture and being intended for the cantilevered mounting of the door wing, there are provided at least two guide rollers which are arranged at a distance one behind the other in the direction of displacement of the door wing and outside the door aperture limited laterally by door posts and which are rotatably mounted about axes directed transversely, especially at right angles to the abovementioned direction of displacement. To simplify production, whilst at the same time reducing the deadweight, and to increase operating reliability, the two guide rollers (7, 8) are mounted on the lower-boom extension (5) of the door wing (4) and are jointly arranged so as to engage on a guide rail (9) to be mounted at a fixed location outside the door aperture (3) in the direction of displacement of the door wing (4), specifically in such a way that the first guide roller (7) adjacent to the door post (1) is supported on the topside and the other second guide roller (8) on the underside of the guide rail (9), both so as to be capable of rolling longitudinally. <IMAGE>
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