DEVICE FOR DELIVERING DRILL FOR AUTOMATIC DRILL EXCHANGER

摘要

PURPOSE:To facilitate the handing of a drill by providing plural stepped through holes for housing drills in a drill magazine and making a drill holder a slidable double cylinder form. CONSTITUTION:Five drills 3a to 3e having different diameters from each other are housed in a drill magazine 1, in which stepped through holes 1a to 1e for housing the drills 3a to 3e are provided. In a double cylinder form drill holder 11, an outer cylinder 11a and an inner cylinder 11b are slidably fitted to each other and the outside diameter of the outer cylinder 11a is fitted into the larger diameter part of the stepped through hole 1a while the inside diameter of the inner cylinder 11b is larger than the largest diameter among the diameters of the bit parts of the drills 3a to 3e. A lifter 17 pushes up the inner cylinder 11b of the drill holder when thrust up by an air cylinder 15. A strong coil spring 14 is compressedly provided between the lifter 17 and a bottom plate 11a-1.