Apparatus for assembling plug joint

A plug joint assembling apparatus for inserting a joint terminal into an insulative tubular joint bushing to assemble a plug joint, said joint bushing including at its one end a sealing collar portion having an air vent hole, said joint terminal including a tubular terminal element and a terminal spring connected to one end of said terminal element and serving as a coil spring, said plug joint assembling apparatus comprising:

• a joint bushing feed portion for feeding said joint bushing from a first position to a second position;
• a terminal temporary insertion portion for temporarily inserting a part of said joint terminal into said joint bushing;
• a terminal main insertion portion for inserting said joint terminal into a set position in said joint bushing;
• a withstand voltage test portion for checking said joint bushing receiving said joint terminal therein for leak;
• a terminal insertion condition check and talc coating portion for performing a retraction length check on said joint terminal received in said joint bushing, performing a continuity check between said terminal element and terminal spring of said joint terminal, and applying talc to an inner peripheral surface of said joint bushing around said terminal spring;
• a first joint bushing extraction and supply mechanism for removing said joint bushing from said second position in said joint bushing feed portion to feed said joint bushing to said terminal temporary insertion portion;
• a second joint bushing extraction and supply mechanism for removing said joint bushing from said terminal temporary insertion portion to feed said joint bushing to said terminal main insertion portion;
• a third joint bushing extraction and supply mechanism for removing said joint bushing from said terminal main insertion portion to feed said joint bushing to said withstand voltage test portion;
• a fourth joint bushing extraction and supply mechanism for removing said joint bushing from said withstand voltage test portion to feed said joint bushing to said terminal insertion condition check and talc coating portion;
• a joint bushing extraction mechanism for removing and feeding said joint bushing from said terminal insertion condition check and talc coating portion;
• a length measuring mechanism for detecting the axial length of said joint bushing;
• and
• an air vent hole detecting mechanism for detecting said air vent hole,
• said length measuring mechanism and said air vent hole detecting mechanism being located at a given position in a joint bushing feed path extending from said first position to said second position in said joint bushing feed portion.