Car body of a railway car

Abstract

The object of the present invention is to enable production of high-accuracy car body with ease. An underframe 10 is constituted by bonding together a plurality of hollow-shaped materials 50, 60 that are arranged along a longitudinal direction of a car body. The hollow-shaped material 60 constituting the end portion of the underframe 10 in the width direction is provided with a hollow-shaped material 65 corresponding to a part of a side sill. A hollow-shaped material 90 at the lower end of a side structure 20 is provided with a hollow-shaped material 95 corresponding to a part of a side sill. An overlap between a projecting segment 101 of the side sill 95 and the upper surface of the side sill 65 is welded from above. An overlap between a projecting segment 103 of the lower end and a projecting segment 73 is welded from below. The size of the overlap is provided in prospect of the shrinkage of the underframe 10 by welding the bolsters thereto.

We claim:  
     
         1 . A car body of a railway car, wherein: 
 an upper and lower portions of a first side sill at an end portion in the width direction of an underframe and an upper and lower portions of a second side sill at an lower end portion of a side structure are respectively overlapped in the horizontal direction;    said overlap between said upper portion of said first side sill and said upper portion of said second side sill is bonded from above; and    said overlap between said lower portion of said first side sill and said lower portion of said second side sill is bonded from below.    
     
     
         2 . A car body of a railway car according to  claim 1 , wherein at least one member constituting said overlap in said two overlaps is a projecting segment projecting in the horizontal direction, and said projecting segment is formed by elongating a plate constituting a hollow-shaped material of said first side sill or said second side sill.  
     
     
         3 . A car body of a railway car according to  claim 1 , wherein: 
 said first side sill and said second side sill are respectively formed from hollow-shaped materials;    each member constituting said overlap at said lower portion is a projecting segment projecting in the horizontal direction; and    said projecting segments are formed by projecting a lower plate of said hollow-shaped material of said first side sill and a lower plate of said hollow-shaped material of said second side sill in the horizontal direction.    
     
     
         4 . A car body of a railway car according to  claim 1 , wherein at least one member constituting said overlap in said two overlaps is a face plate of a hollow-shaped material which is positioned along the horizontal direction.  
     
     
         5 . A car body of a railway car according to  claim 1 , wherein: 
 said overlap of said upper portion is comprised of an upper face plate of a hollow-shaped material of said first side sill, and a projecting segment formed by elongating a plate connecting two face plates of a hollow-shaped material of said second side sill in the horizontal direction; and    said projecting segment is positioned above said faceplate.    
     
     
         6 . A car body of a railway car according to  claim 1 , wherein a projecting segment projecting downward from said second side sill is positioned to the external side in the width direction of a car body than a welding region of said lower overlap.