| 摘要 |
A railway maintenance vehicle exchanges worn crossties for new ones. Worn ties are collected and stored in open-top gondola cars, preferably progressing longitudinally. New ties are simultaneously unloaded from the gondola cars for distribution along the track. Flange-wheeled tie transport vehicles such as a mobile crane and a bundle clasping transport travel on rails atop the gondola cars to move worn and new ties between collection and distribution devices and the respective storage and unloading locations. Gaps between the cars are bridged by hinged telescoping rail sections. The travel distance between the storage or unloading location and the collection or distribution points change over time. To improve efficiency, at least one intermediate temporary storage basket is moved along the cars and can be passed over by the transport vehicles. The basket is used, preferably with a third tie transport vehicle, to assist in handling bundles and to shorten the trip of the first or second transport for collection or delivery. The basket is particularly useful for accumulating a bundle of new ties for pickup by a bundle grappling transport vehicle. The vehicle can be limited to collecting and storing worn ties left on the rails by a preceding tie extractor, and dropping off new ties, or can incorporate tie extraction and/or tie insertion devices as well.
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