Title:
DRILLING DEVICE
Document Type and Number:
Japanese Patent JPH06257363
Kind Code:
A
Abstract:
PURPOSE: To prevent dispersion of moved earth drilled by means of a drilling device, and improve the strength of drilling members.
CONSTITUTION: A cylindrical member 20 covering the outer circumference of the upper part of a casing 6 concentrically provided to an auger screw 5 is fixed on the non-rotation part of a driving device 4, an inner discharge port 6b is provided on the upper part 6a of the casing 6, and an outer discharge port 20a is provided on the cylindrical member 20. Removed earth is discharged from the inner discharge port 6b of the casing 6a into the cylindrical member 20, and further discharged from the outer discharge port 20a in a decided direction.
Inventors:
SATO NAOMI
Application Number:
JP7515093A
Publication Date:
September 13, 1994
Filing Date:
March 09, 1993
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
E21B3/02; E21B7/00; E21B12/06; (IPC1-7): E21B7/00; E21B3/02; E21B12/06
Attorney, Agent or Firm:
Shoichi Wakata