Patent ID: 6220176
Filing Date: 2001-04-24
Classification: B61B,B66C

Abstract:
A travelling mechanism for a rail having flange parts and a web, comprising:lateral bars;means for connecting together the lateral bars below the rail so that the lateral bars are spaced from each other, the connecting means including a connecting traverse, the spacing of the lateral bars being adjustable;running wheels rotatably mounted to the lateral bars so as to be opposite each other, the running wheels being restable on the flange parts of the rail;guide rollers rotatably mounted to the lateral bars, in front of and behind each running wheel, the guide rollers being parallel to the web and engageable with lateral edges of the flange parts, each of the guide rollers being rotatable about a respective vertical rotational axis; andmeans for varying a distance between the vertical rotational axes of the guide rollers independent of the running wheels so that the guide rollers can be adjusted to a desired flange width of the rail, the distance varying means including a longitudinal slot provided in each of the lateral bars above each of the guide rollers, each longitudinal slot being arranged on a horizontal plane so as to extend at a right angle to a direction of travel of the travelling mechanism, the vertical rotational axis of an associated one of the guide rollers extending through the longitudinal slot, each position of the rotational axis being fixable within two end positions defined by the longitudinal slot.