| 摘要 |
PURPOSE: A coupling structure in which a pair of tightening chucks which are lifted upward and downward are connected to the front end wall surface of a connecting member and fastened with a tightening screw to lower a tightening chuck is provided. Therefore, the coupling structure makes it easy to manufacture and has increased coupling strength. CONSTITUTION: This coupling structure comprises: a guide groove(10) disposed at a front end wall surface containing a spiral part(2) of a connecting member(1); and a pair of tightening chucks(3,3a) containing a tightening chuck(20) on an inner side, an inclined surface(21) on an outer surface, and a guide protruded flap(22) on a rear wall surface, wherein as a spiral part of a tightening screw(4) is fastened to the spiral part of the connecting member by insertion of a protruded guide flap of the tightening chucks into the guide groove of the connecting member, the inclined part(4b) of an inner surface is positioned on the inclined surface of the tightening chucks to compress the tightening chucks. |
