| 摘要 |
The invention provides roller rail clamp apparatus for use in lifting a rail for operations such as replacement of ballast or resurfacing of a railway. T he apparatus (1) comprises parallel pairs of spaced-apart lift roller assemblie s (7-10) mounted to a support for positioning a pair for clamping to a rail of the track, each the lift roller assembly comprising at least one pair of rollers (33, 35), wherein each the roller of a roller pair rotates on an axi s in an essentially vertical plane adjacent a rail and the rollers are on opposite sides of a rail when a lift roller assembly is clamped thereto with the head (42) of the rail releasably retained upwardly of flanges (48, 51) a t the lower ends of the rollers; means (5) for adjustably connecting the apparatus to a carrier thereof; a lift mechanism (14) for adjusting the vertical position of the support relative to the carrier of the apparatus; a nd a tilt mechanism (17) for applying torque about a horizontal axis to linkage between members of a pair of lift roller assemblies.
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