Abstract: A railroad vehicle where an air conditioner can be installed in an upper part of a roof thereof includes a roof structure having an opening, and a low roof main body having a recessed part provided in the opening, and recessed in a cross section, the air conditioner being able to be placed on the recessed part, and an edge part of the low roof main body which is continuously formed from the low roof main body and joined to the roof structure. The low roof main body and the edge part of the low roof main body are made of plastic.

Abstract: A railcar includes an underframe and an energy absorber provided at the underframe. The underframe includes a first end beam, a second end beam, and a sliding center sill connecting the first end beam and the second end beam with each other. The sliding center sill includes a first beam member connected to the first end beam, a second beam member connected to the second end beam, and a coupling member coupling the first beam member to the second beam member. The first beam member slides relative to the second beam member when the coupling member breaks by application of an impact load higher than a predetermined load. The sliding center sill and the energy absorber are arranged in a region located between the first end beam and the second end beam.

Abstract: The present invention includes: an outside plate; first frames each including a first head portion; and second frames each including a second head portion and arranged perpendicular to the first frames. At each of portions where the first frames and the second frames intersect with each other, the second head portion is arranged on the first head portion so as to overlap the first head portion.

Abstract: An end bodyshell of a railcar bodyshell includes: a pair of end posts provided at a width direction middle portion of the end bodyshell; corner posts respectively provided at both width direction end portions of the end bodyshell; an end plate to which upper portions of the end posts and upper portions of the corner posts are coupled; and an end-side end beam to which lower portions of the end posts and lower portions of the corner posts are coupled. The end-side end beam includes: a middle member connecting the end posts in the width direction; and two side members each connecting the end post and the corner post in the width direction.

Abstract: A step device includes: a plurality of steps arranged so as to be lined up in a railcar width direction and constituting a part of a floor surface; and drive mechanisms configured to cause the steps to move upward and downward at a railcar-width-direction inner side between an upper position at which the plurality of steps become a part of the floor surface and a lower position at which the steps are moved downward to constitute boarding stairs. Each of the drive mechanisms includes a rotating link configured to rotate about one end portion thereof in a vertical plane, connecting links respectively connecting the rotating link to the steps, and an actuator configured to cause the rotating link to rotate. The steps move upward and downward by the rotation of the rotating links via the connecting links.

Abstract: A collision energy absorption column is provided on an end side of a railroad vehicle structure and extends from an end beam toward a roof structure. The collision energy absorption column includes a metal outer member having a transverse cross section of a channel shape, and an inner member made of reinforced plastic provided along an inner circumference of the outer member and extending in parallel with the outer member. The outer member is configured by joining two column halves extending along a column axis after arranging the two column halves are arranged in a direction perpendicular to the column axis of the outer member. The joined part of the column halves extends along the column axis. The outer member is coupled to the end beam and roof by a fastener. The inner member extends between the end beam and a part of the roof structure, excluding the fastening parts.

Abstract: A plurality of side modules include a first module, a second module and a third module extending between the first module and the second module in the carbody longitudinal direction and joined to the first module and the second module. A lower end portion of the first module and a lower end portion of the second module oppose and are joined to a floor bodyshell. A lower end portion of a region of the third module opposes the floor bodyshell, the region being located between the first module and the second module. The lower end portion of the region of the third module is freer with respect to the floor bodyshell than the lower end portion of the first module and the lower end portion of the second module. The third module is supported by the floor bodyshell through the first module and the second module.

Abstract: A side entrance includes a step, a door frame, a door leaf, and a door pocket. A vertical frame included in the door frame and located close to a bogie includes: an upper vertical frame portion located above a floor surface; and a lower vertical frame portion located under the floor surface. The lower vertical frame portion is located closer to an inner side of the door frame than the upper vertical frame portion. A width of an upper step portion of the step in a car longitudinal direction is larger than a width of a lower step portion of the step in the car longitudinal direction.

Abstract: A friction stir welding apparatus includes: a rotating shaft, on which a thread for friction stirring is formed; and a drive unit rotatably supporting the rotating shaft. A rotating shoulder configured to rotate together with the rotating shaft to generate frictional heat between the rotating shoulder and back surfaces of workpieces is fixed to a distal end of the rotating shaft. The rotating shoulder is pushed against the back surfaces of the workpieces by a pushing mechanism. A stationary shoulder penetrated by the rotating shaft and configured to hold the workpieces in a sandwiching manner together with the rotating shoulder is non-rotatably mounted to the drive unit or a member connected to the drive unit.

Abstract: A railcar bodyshell includes: a plurality of modules into which at least one of a floor portion, side portion, and roof portion of the bodyshell is divided in a car longitudinal direction; and an elongated member extending in the car longitudinal direction, the plurality of modules being attached to the elongated member. The elongated member includes a groove portion for fixing the plurality of modules to the elongated member the groove portion extending in the car longitudinal direction.

Abstract: A floor structure of a railcar includes: a pair of side sills extending in a railcar longitudinal direction; cross beams extending in a railcar width direction and coupling the pair of side sills; a supporting member, which is arranged on upper surfaces of the cross beams, in which bottom surface portions and convex portions projecting upward from the bottom surface portions are alternately, continuously formed in the railcar width direction, and which extends in the railcar longitudinal direction; receiving members located at positions corresponding to the cross beams, arranged on an upper surface of the supporting member, and extending in the railcar width direction; and a floor panel arranged on upper surfaces of the receiving members. The receiving members include: a floor plate contact portion that contacts the floor panel; and leg portions, extending from the floor plate contact portion to the bottom surface portion of the supporting member.

Abstract: A railcar includes an underframe and an energy absorber provided at the underframe. The underframe includes a first end beam, a second end beam, and a sliding center sill connecting the first end beam and the second end beam with each other. The sliding center sill includes a first beam member connected to the first end beam, a second beam member connected to the second end beam, and a coupling member coupling the first beam member to the second beam member. The first beam member slides relative to the second beam member when the coupling member breaks by application of an impact load higher than a predetermined load. The sliding center sill and the energy absorber are arranged in a region located between the first end beam and the second end beam.

Abstract: A side bodyshell of a railcar includes: an outside plate including a window opening; horizontal frames arranged below the window opening and joined to the outside plate; and a vertical frame crossing the horizontal frames in a manner to pass over a pier panel, which is lateral to the window opening. The vertical frame includes: a first flange joined to the outside plate at the pier panel; and a second flange spaced apart from the outside plate below the first flange such that a step is formed between the first flange and the second flange, the second flange being joined to the horizontal frames.

Abstract: An end bodyshell of a railcar bodyshell includes: a pair of end posts provided at a width direction middle portion of the end bodyshell; corner posts respectively provided at both width direction end portions of the end bodyshell; an end plate to which upper portions of the end posts and upper portions of the corner posts are coupled; and an end-side end beam to which lower portions of the end posts and lower portions of the corner posts are coupled. The end-side end beam includes: a middle member connecting the end posts in the width direction; and two side members each connecting the end post and the corner post in the width direction.

Abstract: The present invention includes: an outside plate; first frames each including a first head portion; and second frames each including a second head portion and arranged perpendicular to the first frames. At each of portions where the first frames and the second frames intersect with each other, the second head portion is arranged on the first head portion so as to overlap the first head portion.

Abstract: A step device includes: a plurality of steps arranged so as to be lined up in a railcar width direction and constituting a part of a floor surface; and drive mechanisms configured to cause the steps to move upward and downward at a railcar-width-direction inner side between an upper position at which the plurality of steps become a part of the floor surface and a lower position at which the steps are moved downward to constitute boarding stairs. Each of the drive mechanisms includes a rotating link configured to rotate about one end portion thereof in a vertical plane, connecting links respectively connecting the rotating link to the steps, and an actuator configured to cause the rotating link to rotate. The steps move upward and downward by the rotation of the rotating links via the connecting links.

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

Abstract: A railroad vehicle where an air conditioner can be installed in an upper part of a roof thereof includes a roof structure having an opening, and a low roof main body having a recessed part provided in the opening, and recessed in a cross section, the air conditioner being able to be placed on the recessed part, and an edge part of the low roof main body which is continuously formed from the low roof main body and joined to the roof structure. The low roof main body and the edge part of the low roof main body are made of plastic.

Abstract: A collision energy absorption column is provided on an end side of a railroad vehicle structure and extends from an end beam toward a roof structure. The collision energy absorption column includes a metal outer member having a transverse cross section of a channel shape, and an inner member made of reinforced plastic provided along an inner circumference of the outer member and extending in parallel with the outer member. The outer member is configured by joining two column halves extending along a column axis after arranging the two column halves are arranged in a direction perpendicular to the column axis of the outer member. The joined part of the column halves extends along the column axis. The outer member is coupled to the end beam and roof by a fastener. The inner member extends between the end beam and a part of the roof structure, excluding the fastening parts.

Abstract: A body structure for rolling stock is disclosed. The body structure may include an outside sheathing of a side construction, and a plurality of reinforcement members joined to said outside sheathing interiorly of said outside sheathing. Each of said plurality of reinforcement members may include a U-shaped part which is substantially U-shaped in cross-section and two fitting flange parts extending continuously from end edges of the U-shaped part in opposite directions. The fitting flange parts may be joined to said outside sheathing by laser welding, and the U-shaped part of at least one of said plurality of reinforcement members may be smaller in width than the U-shaped part of another of said plurality of reinforcement members provided on another part of said outside sheathing.