Car structure

Abstract

A car structure is provided which has the required strength against vertical load and vibration while avoiding increase in weight of the structure. At an entrance 6 of the railroad car structure 20 in which a side structure 2 is formed by a hollow member, the side structure 2 and a frame 7 are coupled via an L-shaped fitting 10 . The L-shaped fitting 10 consists of a first joint part 10 a which is in the form of a plate and couples a vehicle outer face plate 8 and a vehicle inner face plate 9 and a second joint part 10 b which is in the form of a plate and butt welds a part of the first joint part 10 a near the vehicle outer face plate 8 and the frame 7 . Plate thickness of the second joint plate 10 b is larger than plate thickness of the vehicle outer face plate 8 . As a result, the required strength against vertical load can be ensured without increasing the plate thickness of the vehicle outer face plate 8 , in other words, with little increase in weight of the structure.

1 . A car structure comprising a side structure formed by a hollow member consisting of a vehicle outer face plate, a vehicle inner face plate, and a plurality of ribs coupling both face plates, the side structure comprising an entrance opened therein, in which an entrance frame is fixed to the vehicle outer face plate and the vehicle inner face plate of the hollow member along an opening edge of the entrance, wherein the vehicle outer face plate and the vehicle inner face plate are welded by a joint member along the opening edge, and
 the joint member consists of a first joint part which couples the vehicle outer face plate and the vehicle inner face plate and a second joint part which couples a part of the first joint part near the vehicle outer face plate and a vehicle outer side of the entrance frame.   
   
   
       2 . The car structure according to  claim 1 , wherein
 the first joint part and the second joint part of the joint member are integrally formed and form an L-shape as a whole in a cross section perpendicular to the opening edge.   
   
   
       3 . The car structure according to  claim 1 , wherein
 the first joint part and the second joint part of the joint member are separately formed and coupled by welding to form an L-shape in across section perpendicular to the opening edge.   
   
   
       4 . The car structure according to  claim 1 , wherein
 the first joint part and the second joint part of the joint member are separately formed and the second joint part is a member which is integral with the entrance frame and projects from the entrance frame towards the side structure, and   the first joint part and the second joint part are coupled by welding to form an L-shape in a cross section perpendicular to the opening edge.   
   
   
       5 . The car structure according to  claim 1 , wherein
 thickness of the second joint part is larger than thickness of the vehicle outer face plate.