Safety guard limiting either side of the pivot of selette of a semi - trailer transported on a railroad car

摘要

The safety mechanism consists of a retaining plate (24) with a cavity (16) to receive the semi-trailer's pivot (11), mounted on an articulated arm (13) with a rack (33) and a pawl (35) for locking it in the raised position. The retaining plate is connected to a forked end of the arm, and is raised and lowered by a pneumatic drive (31) with one or more chambers (32).