| 摘要 |
A mobile apparatus for sequentially exchanging selected consecutive groups of old ties in an existing railroad track for groups of new ties while retaining groups of old ties therebetween to support the mobile apparatus on the track, which comprises a continuously advancing bridge-like work vehicle having a machine frame defining an upwardly recessed portion between respective ends thereof and a respective swivel truck supporting each machine frame end. A continuous guide track is mounted atop the work vehicle and a power-driven tie transporting crane is mounted for mobility on the guide track. A succession of different individual devices are mounted in the recessed portion of the work vehicle machine frame and operative to effectuate different sequential operations for exchanging the selected old ties for the new ties, the tie exchanging devices including in sequence in the operating direction (1) a spike pulling device, (2) a spike collecting device for collecting the pulled spikes, (3) a ballast clearing device including tools for lifting the railroad track lifting and for laterally moving the old ties wherefrom the spikes have been pulled, (4) a tie plate transporting device, (5) a tie pulling device for laterally withdrawing the laterally moved old ties from the railroad track and a vertical conveyor succeeding the tie pulling device for conveying the withdrawn old ties, (6) a tie inserting device for inserting the new ties and a vertical conveyor preceding the tie inserting device for conveying the new ties thereto, and (7) a device for tamping ballast under the inserted new ties. A respective drive longitudinally displaces each tie exchanging device.
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