Assembling and machining apparatus having transfer means for workpieces and parts

An assembling and machining apparatus having transfer means for workpieces and parts, comprising:

• a first and a second transfer path disposed one on the top of the other, said first and second transfer paths transferring in opposite directions any one of two object groups, one group consisting of workpieces and the other group consisting of part feeding pallets;
• a first return unit interposed anywhere between an intermediate point and the downstream end, inclusive, of said first path and second path, said first return unit relocating any one of said two object groups from said first transfer path to said second transfer path;
• a second return unit for relocating any one of said two object groups from said second transfer path to said first transfer path;
• a plurality of assembling or machining units positioned above said first transfer path;
• a plurality of first detection units mounted on said first transfer path close to said plurality of assembling or machining units, said plurality of first detection units detecting the type and status of any one of said two object groups on said first transfer path;
• and
• a plurality of transfer units located adjacent to working areas of said plurality of assembling or machining units, said plurality of transfer units retrieving from said first transfer path any one of said two object groups detected by any of said plurality of first detection units for any of later machining and assembling, said plurality of transfer units further returning any one of said two objects groups to said first transfer path after any of said machining and assembling.