Drilling head system for I-beams

Claim 1

A drilling head system for adjustable support of a plurality of drilling spindles of the type used in drilling holes in structural members such as I-beam webs comprising: A. a base adapted for retention of an I-beam to be drilled and defining a drilling area; B. at least two vertical support posts mounted in said base, so as to movably support a spindle head drilling platform in superposed relationship with respect to said base; C. at least four vertical threaded shafts mounted in said base and extending vertically with respect to said base and in parallel relationship with respect to said support posts; including a worm gear individually engaging each such shaft, so as to move vertically said spindle head drilling platform at its four corners; D. a horizontally disposed spindle head drilling platform mounted at its sides upon said support posts and including a plurality of threfded shaft apertures such that said threaded shafts may extend therethrough; said spindle head drilling platform including a plurality of friction pad housings, having individually adjustable friction pads engaging the exterior surfaces of said support posts; E. a drilling housing including a plurality of drilling spindles and drilling spindle drive means, said housing being horizontally, adjustably mounted upon said drilling platform and said drilling spindles extending downwardly into said drilling area; said drilling housing being mounted upon a slidable carriage and including laterally extending threaded jack shafts, together with drive means mounted upon said platform and engagable with said jack shafts so as to move horizontally said shaft and, thus, said drilling housing with respect to said platform; F. drilling housing horizontal adjustable drive means supported upon said platform and engagable with said drilling housing, so as to horizontally shift said housing and said drilling spindles with respect to said work area and an I-beam supported therein; and G. a vertical drive means supported upon said spindle head drilling platform and engagable with said threaded shafts, so as to raise and lower said drilling platform and thus said drilling spindles with respect to said area and an I-beam supported therein.