Title:
DRILLING DEVICE
Document Type and Number:
Japanese Patent JPH07241839
Kind Code:
A
Abstract:
PURPOSE: To provide a drilling device capable of forming a depth of a hole correctly and drilling without interrupting a series of works.
CONSTITUTION: A drilling device 1 comprises a fixed device 3 fixed to a face to be drilled 2, a support 4 provided on the fixed device 3, a diamond core drill 10 held by the support movably, and a diamond core bit 9 attached to the diamond core drill 10. Accordingly, an outer diameter of a connecting part 12 to the diamond core drill 10 at the diamond core bit 9 is set to be larger than that of a blade 8 at the diamond core bit 9, and a length L1 from the end of the connecting part 12 to the tip of the blade 8 is set to be almost the same as a depth of a hole to be drilled in the face to be drilled 2.
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Inventors:
KANAYAMA TADAO
AKIMOTO TAKAHIRO
YAMASHITA KOJI
YAMAMOTO SATOSHI
AKIMOTO TAKAHIRO
YAMASHITA KOJI
YAMAMOTO SATOSHI
Application Number:
JP3381394A
Publication Date:
September 19, 1995
Filing Date:
March 03, 1994
Export Citation:
Assignee:
HITACHI BUILDING SYST ENG
International Classes:
B23B47/18; B28D1/04; B28D1/14; (IPC1-7): B28D1/14; B23B47/18
Attorney, Agent or Firm:
Kenjiro Take (2 outside)