Railcar

1. A railcar comprising:

a pair of side sills extending in a railcar longitudinal direction;

end beams respectively located at railcar-longitudinal-direction end portions of the side sills to extend in a railcar width direction;

bolster beams located at a railcar-longitudinal-direction inner side of the end beams to extend in the railcar width direction and respectively placed on bogies;

center sills each located between the end beam and the bolster beam to extend in a railcar longitudinal direction;

a plurality of cross beams located at a railcar-longitudinal-direction inner side of the bolster beams to extend in the railcar width direction;

a corrugated plate fixed to upper surfaces of the cross beams to be displaceable relative to the bolster beams in the railcar longitudinal direction; and

a floor pan portion including at least one floor pan located between the bolster beam and the cross beam, wherein

the at least one floor pan includes:

a bottom portion;

a tubular side wall portion extending upward from an outer edge of the bottom portion; and

an annular flange portion extending outward from an upper end portion of the side wall portion and fixed to an upper surface of the bolster beam and the upper surface of the cross beam.

2. The railcar according to claim 1 , wherein:

each of the cross beams includes an upper surface portion joined to the corrugated plate and a lower surface portion separated from the upper surface portion; and

a length of the upper surface portion in the railcar longitudinal direction is larger than a length of the lower surface portion in the railcar longitudinal direction.

3. The railcar according to claim 1 , wherein the corrugated plate is fixed to the upper surfaces of the cross beams and does not contact the bolster beams.

4. The railcar according to claim 1 , wherein the corrugated plate is arranged such that railcar-longitudinal-direction end portions thereof are located at a railcar-longitudinal-direction inner side of the bolster beams.

5. The railcar according to claim 4 , wherein the at least one floor pan is located between the bolster beam and the railcar-longitudinal-direction end portion of the corrugated plate.

6. The railcar according to claim 1 , wherein:

the floor pan portion is located at a railcar-longitudinal-direction inner side of the bolster beam and is connected to the bolster beam;

all or a part of the plurality of cross beams are located at a railcar-longitudinal-direction inner side of the floor pan portion; and

among all or a part of the plurality of cross beams, the cross beam located at an outermost side in the railcar longitudinal direction is connected to the floor pan portion.

7. The railcar according to claim 6 , wherein:

the corrugated plate is arranged such that railcar-longitudinal-direction end portions thereof are located at a railcar-longitudinal-direction inner side of the bolster beams; and

the floor pan portion is located between the bolster beam and the railcar-longitudinal-direction end portion of the corrugated plate.

8. A railcar comprising:

a pair of side sills extending in a railcar longitudinal direction;

end beams respectively located at railcar-longitudinal-direction end portions of the side sills to extend in a railcar width direction;

bolster beams located at a railcar-longitudinal-direction inner side of the end beams to extend in the railcar width direction and respectively placed on bogies;

center sills each located between the end beam and the bolster beam to extend in a railcar longitudinal direction;

a plurality of cross beams located at a railcar-longitudinal-direction inner side of the bolster beams to extend in the railcar width direction;

a corrugated plate fixed to upper surfaces of the cross beams to be displaceable relative to the bolster beams in the railcar longitudinal direction; and

a floor pan portion including at least one floor pan located between the bolster beam and the cross beam, wherein

the at least one floor pan comprises a first floor pan and a second floor pan;

the plurality of cross beams comprises at least a first cross beam and a second cross beam;

the first floor pan is connected to the bolster beam;

the first cross beam is connected to the first floor pan;

the second floor pan is connected to the first cross beam;

the second cross beam is connected to the second floor pan; and

the corrugated plate is fixed to an upper surface of the second cross beam to be displaceable relative to the bolster beam in the railcar longitudinal direction.

9. A railcar comprising:

a pair of side sills extending in a railcar longitudinal direction;

end beams respectively located at railcar-longitudinal-direction end portions of the side sills to extend in a railcar width direction;

bolster beams located at a railcar-longitudinal-direction inner side of the end beams to extend in the railcar width direction and respectively placed on bogies;

center sills each located between the end beam and the bolster beam to extend in a railcar longitudinal direction;

a plurality of cross beams located at a railcar-longitudinal-direction inner side of the bolster beams to extend in the railcar width direction;

a corrugated plate fixed to upper surfaces of the cross beams to be displaceable relative to the bolster beams in the railcar longitudinal direction; and

a floor pan portion including at least one floor pan located between the bolster beam and the cross beam, wherein

surface portions of both railcar width direction end portions of the corrugated plate and upper surfaces of the pair of side sills are fixed to each other.