US 12,337,881 B2
Body bolster structure for railway vehicle, and railway vehicle
Sota Kimura, Tokyo (JP); and Kyouji Takahara, Tokyo (JP)
Assigned to HITACHI, LTD., Tokyo (JP)
Appl. No. 17/762,427
Filed by HITACHI, LTD., Tokyo (JP)
PCT Filed Jul. 6, 2020, PCT No. PCT/JP2020/026425
§ 371(c)(1), (2) Date Mar. 22, 2022,
PCT Pub. No. WO2022/009271, PCT Pub. Date Jan. 13, 2022.
Prior Publication US 2022/0332355 A1, Oct. 20, 2022
Int. Cl. B61F 1/14 (2006.01); B61F 1/12 (2006.01)
CPC B61F 1/14 (2013.01) [B61F 1/12 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A bolster structure of a railroad vehicle that is provided on an underframe constituting a floor of a structure body of the railroad vehicle, comprising:
a plurality of shaped members formed by joining the plurality of shaped members having a multi-layer structure in which a width direction of the structure body is an extrusion direction,
wherein the plurality of shaped members include:
a shaped member having a region in which a part of layers on an underframe side is notched at a center of the structure body in the width direction; and
a shaped member including a fastening portion formed by notching a part of layers at both ends of the structure body in the width direction, and
a side beam of the underframe is fixed by the fastening portion,
wherein as the plurality of shaped members, those obtained by machining shaped members having the same cross-sectional shape are used,
wherein the plurality of shaped members are joined side by side in a longitudinal direction of the structure body, and
wherein among the plurality of shaped members, the shaped member located on an inner side of the structure body in the longitudinal direction includes a portion protruding upward from a joint portion, and the shaped member located on an outer side of the structure body in the longitudinal direction has a portion protruding downward from a joint portion.