FIELD: construction.
SUBSTANCE: device to extend threads of long-welded rails during relaxation of temperature stresses and giving them length corresponding to the size at optimal temperature is equipped with sensors to detect a force of raising threads joined with a crane lifting mechanism. Rail grips are placed on a carriage movable in the horizontal plane, and are additionally equipped with support rollers with interaction with a foot of thread rail during their lift. The carriage is installed on a frame hingedly fixed at the end of a rail-laying crane platform and is attached to a cross beam of the crane lifting mechanism on suspensions.
EFFECT: increased efficiency of a device.
3 dwg
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