Rail with friction control tread surface for inner rail, rail with friction control tread surface for outer rail, and permanent way

Abstract

This rail with a friction control tread surface for an inner rail includes an inner wheel contract surface that is provided so as to be curved along a line shape of a permanent, and is subjected to being in contact with an inner wheel of the rail car which rolls therealong. A plurality of grooves extending in a direction orthogonal to the line shape are formed on the inner wheel contract surface. This rail with a friction control tread surface for an outer rail includes an outer wheel contact surface that is provided so as to be curved along a line shape of a permanent way, and is subjected to being in contact with an outer wheel of the rail car which rolls therealong. A plurality of grooves extending in a direction of the line shape are formed on the outer wheel contract surface.

1 . A rail with a friction control tread surface for an inner rail, comprising:
 an inner wheel contact surface that is provided so as to be curved along a line shape of a permanent way along which a rail car travels, and is subjected to being in contact with an inner wheel of the rail car which rolls therealong,   wherein a plurality of grooves extending in a direction orthogonal to the line shape while being arranged at intervals in a direction of the line shape are formed on the inner wheel contact surface.   
     
     
         2 . The rail with a friction control tread surface for an inner rail according to  claim 1 ,
 wherein the grooves are formed on only the inner wheel contact surface.   
     
     
         3 . A rail with a friction control tread surface for an outer rail, comprising:
 an outer wheel contact surface that is provided so as to be curved along a line shape of a permanent way along which a rail car travels, and is subjected to being in contact with an outer wheel of the rail car which rolls therealong,   wherein a plurality of grooves extending in a direction of the line shape while being arranged at intervals in a direction orthogonal to the line shape are formed on the outer wheel contact surface.   
     
     
         4 . A permanent way comprising:
 the rail with a friction control tread surface for an inner rail according to  claim 1 ; and   a rail with a friction control tread surface for an outer rail comprising:
 an outer wheel contact surface that is provided so as to be curved along a line shape of a permanent way along which a rail car travels, and is subjected to being in contact with an outer wheel of the rail car which rolls therealong, 
 wherein a plurality of grooves extending in a direction of the line shape while being arranged at intervals in a direction orthogonal to the line shape are formed on the outer wheel contact surface. 
   
     
     
         5 . A permanent way, comprising:
 the rail with a friction control tread surface for an inner rail according to  claim 2 ; and   a rail with a friction control tread surface for an outer rail, comprising:
 an outer wheel contact surface that is provided so as to be curved along a line shape of a permanent way along which a rail car travels, and is subjected to being in contact with an outer wheel of the rail car which rolls therealong, 
 wherein a plurality of grooves extending in a direction of the line shape while being arranged at intervals in a direction orthogonal to the line shape are formed on the outer wheel contact surface.