Title:
DRILLING MACHINE
Document Type and Number:
Japanese Patent JP2014148862
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a drilling machine which allows rotation speeds of an auger screw and a casing to be separately set.SOLUTION: A drilling machine 1 comprises: an auger screw 30; a first driving device 10 to rotate the auger screw 30; a cylindrical casing 40 where the auger screw 30 is inserted therein; a second driving device 20 to rotate the casing 40; and a lifting and lowering device 50 to lift and lower the casing 40 and the second driving device 20. The first driving device 10 and the second driving device 20 are supported by a base machine 100. The drilling machine 1 drills the ground by rotating at least either the auger screw 30 or the casing 40 and allows rotation speeds of the auger screw 30 and the casing 40 to be separately set.
Inventors:
FUTADO NOBUO
Application Number:
JP2013019106A
Publication Date:
August 21, 2014
Filing Date:
February 04, 2013
Export Citation:
Assignee:
AVOLON SYSTMES CORP
International Classes:
E21B3/02; E21B7/00; E02D7/00
Attorney, Agent or Firm:
Michizo Isono
Etsuo Tada
Etsuo Tada
Previous Patent: REINFORCING STRUCTURE OF BUILDING
Next Patent: FREEZING PREVENTION METHOD AND FREEZING PREVENTION DEVICE
Next Patent: FREEZING PREVENTION METHOD AND FREEZING PREVENTION DEVICE