| 摘要 |
A multiple spindle drilling machine for landslide protection wide flange beams, comprising a feed device for transporting on a machine stand a landslide protection wide flange beam in the longitudinal direction thereof intermittently by a predetermined length at a time, a drilling device adapted to drill the surface of at least one of the two left and right flanges and the web of the landslide protection wide flange beam every time the feed device stops the transportation operation, and a feed pitch correcting device including positioning means so disposed that every time the feed device stops the transportation operation, the positioning means are inserted in holes previously drilled in the wide flange beam to correct the position of the wide flange beam in the longitudinal direction thereof. |
