Abstract: A multiple spindle drilling machine for wide flange beams comprising at least a pair of wide flange beam supporting rollers for setting and supporting both the flanges of a wide flange beam, respectively, in a cantilevering manner at the drilling position of the wide flange beam, at least a pair of gripping members for gripping the wide flange beam from both the sides thereof so that the beam is not moved, a plurality of drills disposed so that they can move in the lateral direction and the widthwise direction of the wide flange beam for drilling the wide flange beam, and a device for moving at least one of said wide flange beam supporting rollers, said gripping members and said drills integrally in the widthwise direction of the wide flange beam.

Abstract: A multiple spindle drilling machine for wide flange beams comprising a guide member vertically movably disposed on a gear box, drills disposed on the guide member in two upper and lower lines, said drills being arranged so that when they are moved and brought close to a wide flange beam together with the gear box, flanges of the wide flange beam are drilled, sensing means having the top end capable of bearing against the web surface of the wide flange beam and attached to a part of the guide member, and a centering device for vertically moving said sensing means together with the guide member and stopping said vertical movement when the sensing means bears against the web surface of the wide flange beam, so that the central position between the two lines of the drills is made in agreement with the central position of the thickness direction of the web of the wide flange beam.

Abstract: A multiple spindle drilling machine comprising a drilling device attached to a movable attachment stand to drill a web of a wide flange beam, the drilling device including a plurality of drills aligned in the lateral direction of the web, and a shifting device for swinging and shifting the movable attachment stand from a point on a line rectangularly intersecting a flange of the wide flange beam to the point on a line obliquely intersecting the flange of the wide flange beam with one end of the movable attachment stand being as the center.

Abstract: An apparatus for adjusting the vertical position of drills in a multiple spindle drilling machine comprising drills attached in upper and lower two lateral rows to a gear box of the multiple spindle drilling machine, said two groups of the drills being arranged so that the drills of the respective groups can be simultaneously moved in the vertical direction, a motor for driving and rotating the two groups of the drills, a moving device disposed to connect said two groups of the drills so that they are moved in the vertical direction according to the height of drilling positions of a material to be processed, and a positioning device attached to the gear box to regulate the vertical movement of the drills of the respective groups within a certain range and set the vertical position thereof.

Abstract: 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.

Abstract: A multiple spindle drilling machine can simultaneously drill a plurality of bores for inserting the rivets or the bolts through the web and a pair of flanges of wide flange beams which are used in building and construction by a first, second and third drilling assembly. A supporting device mounted on the upper side of a machine table which stops the wide flange beam is fed by a feeding device thereon and supports it at a predetermined drilling position. The first drilling assembly is mounted so as to be movable toward the vertical direction from the upper position of the machine table and has multi-drills for drilling a plurality of bores through the web of the wide flange beam. The second and third drilling assemblies are mounted so as to be movable toward the horizontal direction from both of the side positions of the machine table and have multi-drills for drilling a plurality of bores through both flanges of the wide flange beam.