<p>The pantograph has a pantograph rocker (2) comprising an abrasive strip arranged transverse to direction of travel and brackets (4,5) provided transverse to direction of travel. The pantograph rocker is adjustable by shifting the brackets by an adjusting unit (8) in the width. The abrasive strip has abrasive strip ramp horns (12) at its ends. The brackets stand in the retracted position laterally with a bracket ramp horn (7). The brackets are guided and supported in the retracted position only by the adjusting unit.</p>
