Frame for transport unit e.g. bicycle, has pipes connected to each other along line parallel to pipe axes, and ribs of hardness formed at pipes by punching/casting process, where ribs are connected with each other by rivets or spot welding

摘要

The frame (2) has pipes connected to each other along a line parallel to pipe axes to form a support structure of the frame, where an end (a) of a pipe segment is connected only with an end (m) of another pipe segment. Connection ribs of hardness are formed at the pipes by a punching or casting process, where the ribs are connected with each other by rivets or spot welding. The frame is formed as a sheet metal mold part from deformable material.