| 摘要 |
A center sill for accommodating coupling facilities on a railcar comprises two substantially Z-shaped hollow sections each having an upper section strip and a lower section strip joined by a connecting member. The Z-shaped hollow sections are arranged mirror image to each other and joined at the upper section strips. Each hollow section part features a connecting member having a pair of sidewalls joining the upper and lower strips and hollow chambers formed by transverse struts running between the sidewalls. To improve its rigidity, fatigue and tensile strength and to make assembly of the sill easier, the hollow section is cut away close to one end of the railcar and a reinforcing tubular shaped part is inserted into this recess. The cut runs preferably along the lower side of the transverse strut next to upper section strip, along the upper side of the lower section strip, and between these cuts approximately perpendicular across the chambers. A tongue on the reinforcing tubular shaped part fits over the outer surface of a sidewall. A stop on the part comes to rest against the cut edges of the chambers which it at least partly covers. |
