| 摘要 |
In a roller device ( 6,7 ) for a movable point of frog ( 1 ), including a sliding strip ( 18 ) and at least one roller ( 11 ) and at least one roller bearing ( 12 ) fixed to a stationary part of the switch, the roller(s) ( 11 ) is/are mounted on an arm ( 19 ) of a double-armed lever ( 10 ). The pivot bearing ( 12 ) of the lever ( 10 ) is arranged in a support ( 13 ) connected with a stationary part of the switch, wherein the arm ( 18 ) facing away from the roller(s) ( 11 ), of the double-armed lever ( 10 ) is pivotable against a spring ( 19 ) with adjustable spring power. |
