| 摘要 |
The bed (10) is provided with a height-adjustable lower frame (14) comprising a plurality of supporting legs (16) and with an upper frame (12) connected with said lower frame. Each supporting leg (16) comprises at its lower end (38) a swivelling and/or guide roller (40) which is received by the supporting leg (16) and is enclosed by a supporting edge (52) of the supporting leg (16) at the lower end (38) of the latter. Said roller (40) is retained by a retaining element (42,44) which is displaceably guided along the supporting leg (16) for the purpose of moving the roller (40) out of the lower end (38) of the supporting leg (16) beyond the supporting edge (52) of the latter and into the lower end (38) of the supporting leg (16). A lifting means (56) is movable out of the upper end (68) of the supporting leg (16) and into the upper end (68) of the supporting leg (16), said lifting means (56) comprising a fastening element (76) which is connected with the upper frame (12). For this bed (10) it is provided that the lifting means (56) comprises a double-spindle arrangment (58) having a drivable inner spindle (60) whose upper end (74) protrudes beyond the supporting leg (16), and a hollow spindle (62) receiving said inner spindle (60), wherein the upper end (74) of the inner spindle (60) can be brought in engagement with a driving element (84) adapted to be driven by a driving device (88) connectable with the fastening element (76), the inner spindle (60) threadedly engages with the hollow spindle (62) and the hollow spindle (62) threadedly engages with the supporting leg (16), the hollow spindle (62) and/or the inner spindle (60) presses/press against the retaining element (42,44 |
