Title:
CONNECTION STRUCTURE OF ROTARY TABLE AND CASING DRIVE ADAPTER IN EARTH DRILL
Document Type and Number:
Japanese Patent JP2003314178
Kind Code:
A
Abstract:
To provide a sturdy and safe mounting structure preventing a casing drive adapter mounted on a rotary table from dropping due to breakage of a bolt 11.
In a mounting structure of the rotary table and the casing drive adapter in an earth drill, the lower peripheral side face of a sleeve provided with a driving rib at the internal wall and a mounting bracket attached to the upper part of a flange adapter are fixed together by a plurality of fixing tools inserted in the radial direction of the sleeve.
Inventors:
OCHIZAWA JUNICHI
Application Number:
JP2002126069A
Publication Date:
November 06, 2003
Filing Date:
April 26, 2002
Export Citation:
Assignee:
SUMITOMO HEAVY IND CONSTR
International Classes:
E21B3/04; E21B17/08; (IPC1-7): E21B3/04; E21B17/08
Attorney, Agent or Firm:
Isamu Ohashi (1 outside)