RAIL FASTENING DEVICE HAVING ADJUSTMENT MECHANISM WITH ENLARGED ADJUSTMENT AMOUNT

PROBLEM TO BE SOLVED: To provide a rail fastening device having an adjustment mechanism with an enlarged adjustment amount capable of achieving a rail position adjustment amount larger than that of a conventional device.SOLUTION: A rail fastening device has an adjustment mechanism with an enlarged adjustment amount. In order to secure an adjustment amount of the line of a rail, rectangular holes (8A, 11A) in a direction perpendicular to the rail are formed in the rail having a saw-tooth shape (8A', 11A') on a tie plate side, A saw-tooth shape (15C) and a regular dodecagonal shape (15B) are respectively provided on the lower side face and the bottom face of an adjustment washer (15) mounted inside the rectangular holes (8A, 11A), and when adjusting the line of the rail of a sleeper rail fastening device, a target rail position adjustment amount is secured by optionally shifting engagement thereof.