Title:
FRONT FRAME FOR EARTH DRILL
Document Type and Number:
Japanese Patent JP3312672
Kind Code:
B2
Abstract:
PURPOSE: To readily and safely execute mounting/demounting work for an attaching pin in attaching or releasing a front frame to or from an earth drill body (or boom) in a short period of time.
CONSTITUTION: A stand 10 for supporting a front frame 2 at its base end side on ground in mounting/demounting the front frame 2 is provided on the front frame 2 at its base end of an earth drill on which a kelly-bar driving device is mounted on its upper part. The length of the stand 10 is that meeting the height of a pin hole 19a to the height of a pin hole on the body side when the stand 10 supports the front frame 2.
Inventors:
Hidekazu Ajiro
Application Number:
JP12314094A
Publication Date:
August 12, 2002
Filing Date:
May 12, 1994
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
E21B11/00; (IPC1-7): E21B11/00
Domestic Patent References:
| JP6225691A | ||||
| JP175151U |
Attorney, Agent or Firm:
Katsuichi Wakata