Patent ID: 6135270
Filing Date: 2000-10-24
Classification: B23K

Abstract:
A guide rail mechanism for a bonding apparatus comprising a pair of guide rails that guide a workpiece and mounted on guide rail stands via rail height adjustment spacers, wherein said guide rail mechanism comprises:raising-and-lowering shafts vertically provided in said guide rail stands so as to be moveable upward and downward and rotatable in said guide rail stands, each of said raising-and-lowering shafts being formed with a central shaft portion disposed at substantially an axial center thereof and an upper shaft portion and a lower shaft portion which are smaller in diameter than said central shaft portion and formed on both ends of said central shaft portion,guide rail driving means provided in said guide rails and press said guide rails against said central shaft portions of said raising-and-lowering shafts; andshaft driving means provided in said guide rail stands so as to urge said raising-and-lowering shafts upward; and whereinsaid guide rails are coupled to said upper shaft portions of said raising and-lowering shafts so as to be movable upward and downward; andsaid raising-and-lowering shafts is maintained at an elevated position and at a lowered position, said elevated position being where said guide rails are lifted by said central shaft portions of said raising-and-lowering shafts by way of said shaft driving means so as to form gaps between said guide rails and said guide rail stands and to allow said rail height adjustment spacers to be brought into and taken out of said gaps, and said lowered position being where said raising-and-lowering shafts are moved downward so that said guide rail height adjustment spacers are held between said guide rail stand said guide rail stands by way of said guide rail driving means.