Multispindle-drilling machine

In a multispindle drilling machine for drilling series of holes in a workpiece, particularly a furniture part, said machine including a drilling head having drilling spindles, feed means for moving said drilling head toward and away from the workpiece between a maximum drilling depth position and a withdrawn position, and at least one positioning pin mounted on said drilling head, said drilling head being slidable relative to said positioning pin in opposite directions between a projected position of said positioning pin, whereat an end of said positioning pin extends beyond drills supported by said drilling spindles such that said end may be positioned in a hole previously drilled in the workpiece, and a retracted position of said positioning pin, whereat said end of said positioning pin is spaced further from the workpiece than are the drills, whereby during a drilling operation said drilling head moved relative to the workpiece from said withdrawn position to said maximum drilling depth position and thereby relative to said positioning pin from said projected position of positioning pin to a middle position of said positioning pin intermediate said projected and retracted positions, the improvement comprising:

• means for, upon completion of the drilling operation, retaining said positioning pin in said middle position relative to said drilling head, and thereby for, upon operation of said feeding means to move said drilling head from said maximum drilling depth position to said withdrawn position, automatically removing said end of said positioning pin from the previously drilled hole.