Car body

#This invention relates to a car body comprised of extruded stocks, especially to a side body preferable for a rolling stock of a railway car.

#Heretofore, the rolling stock of a railway car, especially the side body thereof, is strongly requested to reduce mass as well as to enhance strength. In order to achieve this contradicting problem, the corner portion of the openings such as windows and the like provided to the side body must be examined from the viewpoint of strength, and various strength enhancement methods have been proposed.

#In a side body with a flat plate fixed to the outer surface of the skeleton member, the stress at the corner portion is reduced by adding a thick plate to the corner portion of the openings such as windows and the like provided to the side body, or by enlarging the radius of the circular arc at the corner portion thereof.

#FIG. 1 is a side view and longitudinal cross-sectional view of a side body according to an embodiment of the present invention.

#FIG. 2 is an explanatory view of the load, shearing force, and bending moment operating on the car body.

#FIG. 3 is a perspective view of the car body of a railway car.

#An embodiment of the present invention will be explained below referring to FIG. 1 through FIG. 3. In FIG. 3, a car body 10 of a railway car is constituted from side bodies 11 forming the left and right surfaces in the longitudinal direction of the car body, end bodies 12 forming the surfaces closing both ends in the longitudinal direction of the car body, a roof body 13 forming the roof, and an underframe 14 forming the floor.

#The side body 11 is provided with openings such as windows 15 or entrances 16. The side body 11 includes upper and lower portions of the window 15, and the upper portion of the entrance 16. The region between the window 15 and the window 15 is called a pier panel 18. The side body 11 between the entrance 16 and the entrance 16 is constituted using plural extruded stocks made of light alloy. The roof body 13 and the under frame 15 are also constituted using plural extruded stocks made of light alloy.

#FIG. 2 schematically shows the load distribution, shearing force distribution, bending moment distribution, and deformation of the car body 10, in the case where vertical loads such as deadweight of the car body 10, electric wires, seats, electric equipments such as transformer, and passengers and the like operate on the car body 10. The car body is supported at supporting points 27 by a bogie. The vertical load is distributed approximately uniformly in the longitudinal direction of the car body and in the width direction of the car body. As a result, the distribution in the longitudinal direction of the car body 10 generates large bending moment at the center thereof, so that large shearing force is generated at the neighborhood of the bogie supporting point 27. The shearing force is equal to none at the center in the longitudinal direction of the car body, and is distributed so as to maximize at the neighborhood of the bogie supporting point 27.