Title:
EXPANDED HOLE DRILLING DEVICE AND COMPONENT FOR THE EXPANDED HOLE DRILLING DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/077713
Kind Code:
A1
Abstract:
An expanded hole drilling device capable of expanding the diameter of a pre-drilled hole to a large diameter without causing decentering, a component for the expanded hole drilling device, and an expanded hole drilling method. The expanded hole drilling device (10) comprises a drill holder (22) fitted to a drill holding part (18) in place of a drill (16) and holding the drill (16) and a centering attachment (24) fitted to the drill holder (22) and formed in a conical shape at its tip part. The expanded hole drilling method comprises a step for displaceably disposing a drilled work on a table (14), a step for inserting the tip part of the centering attachment (24) into the drilled hole and centering them with each other, a step for fixing the centered work to the table (14), and a step for drilling the work to expand the hole with the drill (16) after dismounting the centering attachment (24).
Inventors:
TAKAHASHI SHIGETOSHI (JP)
Application Number:
PCT/JP2005/023561
Publication Date:
July 27, 2006
Filing Date:
December 22, 2005
Export Citation:
Assignee:
TAKAHASHI SHIGETOSHI (JP)
International Classes:
B23B49/00; B25H7/00; B23B41/00; B23B51/00
Foreign References:
| JPS52133399U | 1977-10-11 | |||
| JPS579434U | 1982-01-18 | |||
| JPH08187722A | 1996-07-23 | |||
| JPS5550709U | 1980-04-03 |
Other References:
See also references of EP 1842627A4
Attorney, Agent or Firm:
Uchida, Masaru (Kamiogi 1-chom, Suginami-ku Tokyo 43, JP)
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