Rail restraining method and rail restraining device

Abstract

A rail restraining method for restraining a hot-rolled rail in an upright position at a time of forced cooling of a head portion and a foot portion of the rail includes defining a predetermined position within 2 meters from each of both end faces of the rail along a longitudinal direction of the rail as a first restraining position, defining a predetermined position 3 to 10 meters from the first restraining position in a direction toward center of the rail along the longitudinal direction of the rail as a second restraining position at the time of forced cooling, and restraining displacement of the rail in a vertical direction at the first restraining position and the second restraining position by a restraining force F (kN) that satisfies following Expression (1): F ≧100/ L 2  (1) where L 2 (m) is a distance between the first restraining position and the second restraining position.

1 . A rail restraining method for restraining a hot-rolled rail in an upright position at a time of forced cooling of a head portion and a foot portion of the rail, the rail restraining method comprising:
 defining a predetermined position within 2 meters from each of both end faces of the rail along a longitudinal direction of the rail as a first restraining position;   defining a predetermined position 3 to 10 meters from the first restraining position in a direction toward center of the rail along the longitudinal direction of the rail as a second restraining position at the time of forced cooling; and   restraining displacement of the rail in a vertical direction at the first restraining position and the second restraining position by a restraining force F (kN) that satisfies following Expression (1):
     F≧ 100 /L 2  (1)
 
   
       where L 2  (m) is a distance between the first restraining position and the second restraining position. 
     
     
         2 . A rail restraining device adapted to restrain a hot-rolled rail in an upright position at a time of heat treatment of a head portion and a foot portion of the rail, the rail restraining device comprising:
 a first restraining device that restrains displacement of the rail in a vertical direction at the first restraining position which is defined as a predetermined position 3 to 10 meters from the first restraining position in a direction toward center of the rail along the longitudinal direction of the rail; and   a second restraining device that restrains the displacement of the rail in the vertical direction at the second restraining position which is defined as a predetermined position 3 to 10 meters from the first restraining position in a direction toward center of the rail along the longitudinal direction of the rail, wherein   a restraining force F (kN) of each of the first restraining device and the second restraining device satisfies following Expression (1):
     F≧ 100 /L 2  (1)
 
   
       where L 2  (m) is a distance between the first restraining position and the second restraining position.