DRILLING DEVICE DESIGNED AS AN ELEMENT FOR MAINTAINING DRILLS WHICH ARE DETERMINED IN THE EXECUTION OF MULTIPLE DRILLS

摘要

Said device (1) comprises a certain number of vertical guides (4, 5) and a certain number of elements (6) of drills (7). Each of said support elements (6) is connected to a vertical guide (4, 5), the said elements (6) being respectively made in such a way as a drill (7) in service is driven, in essence, a forward caused by gravity.