| 摘要 |
a) The invention relates to a sweeping device; b) characterised in that the support arm (8) is mounted with the suction orifice so as to be able to move on the sweeper by means of at least three guide rods (17, 18, 19), the guide rods (17, 18, 19) are movably connected in guide parts (15, 15', 16, 16') to oscillating parallelograms with mutually offset operational planes, the guide rods (17, 18) being provided vertically above one another in the guide parts (15, 16). <IMAGE>
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