| 摘要 |
PCT No. PCT/SE91/00574 Sec. 371 Date Feb. 25, 1993 Sec. 102(e) Date Feb. 25, 1993 PCT Filed Sep. 3, 1991 PCT Pub. No. WO92/03962 PCT Pub. Date Mar. 19, 1992.A coupling device for coupling a floor-treating unit to a rod-like device for guiding the floor-treating unit includes a first coupling part and a second coupling part. The first coupling part is hingedly connected to the elongated rod at a hinge axis and the second coupling part is rotatably mounted on the floor-treating unit for rotatable movement about a generally horizontal rotational axis. The first coupling part is movably positioned in a slot in the second coupling part for movement between a first positional setting in which the second coupling part is locked against rotational movement, a second positional setting in which the rod is movable about the hinge axis to unlock the second coupling part and permit rotational movement of the second coupling part about the rotational axis, and a third positional setting in which the rod is movable about the hinge axis for being lowered over the floor-treating unit in a stored position.
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