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Title:
DRILLING MACHINE
Document Type and Number:
Japanese Patent JP2709913
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To drill a vertical hole vertically downward even in a narrow space, and to drill a lateral hole at an arbitrary ground angle safely still in the lifted state.
SOLUTION: A guide shell 31 of a drilling unit 30 is fitted to the front end of a main body 1 where a guide rail 2 is provided in the longitudinal direction in such a manner as to freely rise and fall. A derricking cylinder 35 is installed between the guide shell 31 and the main body in order to raise and fall the guide shell 31, a driving part 33 is provided on the guide shell 31, and the driving part 32 is provided with a drilling rod 33 moved by the driving part 32. The main body 1 is provided with a lifting means 10, sponson beams are fitted to both sides of the main body 1 in such a manner as to be freely overhung, and an outrigger jack 40 for fixing the main body 1 is fitted to the tip of the sponson beam in such a manner as to freely rotate within the vertical plane.


Inventors:
Eiichi Morikawa
Application Number:
JP32797495A
Publication Date:
February 04, 1998
Filing Date:
November 22, 1995
Export Citation:
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Assignee:
Development Concrete Co., Ltd.
International Classes:
E21B7/02; E21B7/04; E21B15/00; E21B15/04; E21B19/08; (IPC1-7): E21C11/00; E21B7/04; E21B15/04
Domestic Patent References:
JP9125861A
JP32092U
JP7233691U
JP676755B2
Attorney, Agent or Firm:
Yamanobu Yasunobu