| 摘要 |
PURPOSE: A coupling expansion method of a rail is provided to prevent the abrasion following sudden impact while driving. CONSTITUTION: A coupling expansion method of a rail comprises first and second rails(1, 2), first and second tongues(11, 21), a connection plate, and a coupling unit. The first and the second rails are installed on a rail road. The first and the second tongues are formed to bending the connection portion of the first and the second rails. The connection plate is attached to the both sides of the first and the second rails. The coupling unit couples the first and the second rails, and the connection plate. |
