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''Rollbocks'',〔Jackson (2006), p. 290 - albeit Jackson uses the German plural here: ''Rollböcke''.〕 sometimes called transporter trailers, are pre-coupled narrow gauge transporter trucks or bogies that allow a coupled train of standard gauge wagons to be automatically loaded or rolled onto so that the train can then continue through a change of gauge. The system uses a narrow gauge rail running in a pit that is built in the middle of a standard gauge track. It allows the ''Rollbock'' bogies to go underneath the standard gauge tracks and as the ''Rollbock'' train is pulled out of the ''Rollbock'' siding each bogie picks up one axle of a standard gauge wagon as it rises out of the ''Rollbock'' pit. Thus two ''Rollböcke'' are needed for a twin-axle wagon. They were a development of the transporter wagon (''Rollwagen'') designed to keep costs down by avoiding the need for a complete wagon. == History == The original invention goes back to the ''Rollwagen'' of the Schweizer Maschinenfabrik Winterthur (Swiss Locomotive and Machine Works, Winterthur) or SLM patented in 1880. It is a simple system for light loads that found applications even when the superior ''Langbein'' system was invented in 1881 by the Maschinenfabrik Esslingen (Esslingen Engineering Works) named after Paul Langbein being the director of the facilities in Saronno, Italy. The ''Langbein'' System uses claw pairs to form a yoke around the axles of the standard gauge bogies. With the bogies pulled out of the pit the standard gauge wheels can sink to the ''Rollbock'' to find support. This method enables the ''Rollbock'' wagons to traverse curves as sharp as radius and, when fully loaded, they could be moved over narrow gauge tracks at a safe speed of .〔Jackson (2006), ibid.〕 In 1974 a renovation of the concept was developed for Yverdon–Ste-Croix railway in Switzerland. Unlike the Langbein System the Vevey System requires no manual intervention to fixate the standard gauge axles over the narrow gauge bogies. Many modern ''Rollbock'' applications have since converted to the Vevey System. The Vevey Technologies company was bought by Bombardier in 1998.〔(【引用サイトリンク】title=Bombardier Transportation in der Schweiz - Geschichte )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「rollbock」の詳細全文を読む スポンサード リンク
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