TOOL FOR PLACING SELF-DRILLING DOWELS

摘要

A tool engageable in a driving device is used for inserting and setting self-drilling dowels of the type consisting of a drill member and a spreader member. The tool is formed of an integral transmission member and plunger and an engaging member laterally encircling the plunger. The transmission member plunger is axially displaceable relative to the engaging member. Percussive and rotative forces generated in the driving device are transferred into the transmission member-plunger. Projections are formed on the transmission member and engage surfaces on -the engaging member for selectively transmitting one or both of the percussive and rotative forces to the drill member. Further, by axially displacing the -transmission memberplunger relative to the engaging member, the spreader member can be driven into the drill member for setting or anchoring it within the borehole formed in the receiving material by the drill member.