Self-locking coupling structure

摘要

The present invention related to connecting two reinforced steel bars (14) of the same or different sizes which are placed end to end. The connector requires bars having the same diameters to be hot rolled with an identical rib patterns (15,16) on each bar (14). The connector (2), while gripped on each of the opposed bars with end nuts, has specially designed grooves (6,7) to fit on rib patterns of the bars and creates an interlocking force between the connector (2) and the bars (14). Thread bars are good example of the hot rolled bars with identical rib patterns described in this invention. The thread bars can use this connector as an alternative to internally thread couplers generally used with the bars. <IMAGE>