Longitudinal beam buckling and pressing device and rail mechanism

The invention provides a longitudinal beam buckling and pressing device and a rail mechanism. The longitudinal beam buckling and pressing device comprises a device body, the device body is provided with a buckling and pressing structure used for buckling and pressing a longitudinal beam and being in sliding fit with the longitudinal beam, and in an XYZ orthogonal coordinate system with the buckling and pressing direction as the Z direction, the longitudinal beam can move in the X direction or the reverse direction of the X direction relative to the device body. The device body is further provided with at least two fastening structures distributed in the X direction at intervals, and the fastening structures are used for being fixedly connected with a rail supporting structure. According tothe device, the technical problem that in the prior art, when the expansion joint changes, the ends of the longitudinal beams are easy to warp up, greater risk of colliding with a train is caused isalleviated. 本发明提供了一种纵梁扣压装置