Title:
シールド掘進方法及びシールド掘進機
Document Type and Number:
Japanese Patent JP2004536983
Kind Code:
A
Abstract:
An excavating drive ( 22 ) movable backward/forward is accommodated in a turnable body ( 9 ) which in turn is turnable about an axis perpendicular to an axis of and in a skin plate ( 7 ). A cutter device ( 38 ) ahead of a rotor ( 22 ) in the excavating drive ( 22 ) is composed of a center cutter ( 40 ) supported by the excavating drive ( 22 ) and a plurality of face plate shaped expansion cutters ( 44 ) fitted to an outer periphery of the center cutter ( 40 ) for pivotal movement backward/forward. Tunneling is effected by the expanded cutter device with the expansion cutters ( 44 ) being pivoted forward. Upon replacement of bits ( 35; 35' ), the expansion cutters ( 44 ) are pivoted backward for contraction of an assembly of them and the cutter device ( 38 ) is accommodated in a turning trajectory (R) of the turnable body ( 9 ) so that the turnable body ( 9 ) is turned backward for replacement of the damaged bits ( 35; 35' ) backward.
Inventors:
Prosperity
Sonoichi Sonomura
Wataru Naito
Hiroyuki Ito
Takashi Nakane
Shusuke Mizuno
Makoto Sugimori
Sonoichi Sonomura
Wataru Naito
Hiroyuki Ito
Takashi Nakane
Shusuke Mizuno
Makoto Sugimori
Application Number:
JP2003515752A
Publication Date:
December 09, 2004
Filing Date:
July 22, 2002
Export Citation:
Assignee:
Taisei Corporation
Ishikawajima Harima Heavy Industries Co., Ltd.
Ishikawajima Harima Heavy Industries Co., Ltd.
International Classes:
E21D9/08; E21D9/087; (IPC1-7): E21D9/087
Attorney, Agent or Firm:
Tsunemitsu Yamada
Seiichi Otsuka
Seiichi Otsuka