Title:
TUNNEL EXCAVATOR
Document Type and Number:
Japanese Patent JP3483225
Kind Code:
B2
Abstract:
PURPOSE: To stabilize replacement by installing a holding jack between a main frame bearing a pilot-pit excavating beam and a main gripper and bearing a gripper holder by the holding jack at the time of replace.
CONSTITUTION: A main beam 4 excavating a pilot pit 2 is extended at the central section of a cutter head 7 for a tunnel excavator 1 excavating a large- diameter tunnel while the end section of the main beam 4 is fixed onto a main frame 5. The main frame 5 is connected to a main gripper 13 through a thrust jack 23 while a holding jack 24 is coupled. When excavation at a fixed distance is completed and the main gripper 13 is replaced, a main-gripper jack holder is supported by the holding jack 24 while a gripper jack is shrunk, and gripper shoes 17 are separated from a wall surface 3 and moved. The main frame 5 is fixed onto the wall surface 3 from a side support 10 at that time. Accordingly, replacement can be conducted stably.
Inventors:
Yujiro Shibukawa
Tsutomu Mizobata
Shinichi Terada
Yoshito Minami
Toshihiro Yamazaki
Masaru Nakamura
Tsutomu Mizobata
Shinichi Terada
Yoshito Minami
Toshihiro Yamazaki
Masaru Nakamura
Application Number:
JP6311495A
Publication Date:
January 06, 2004
Filing Date:
March 22, 1995
Export Citation:
Assignee:
KOMATSU LTD.
Okumura Gumi Co., Ltd.
THE TOKYO ELECTRIC POWER COMPANY,INCORPORATED
Okumura Gumi Co., Ltd.
THE TOKYO ELECTRIC POWER COMPANY,INCORPORATED
International Classes:
E21D9/00; E21B7/28; E21D9/02; E21D9/06; E21D9/10; E21D9/11; (IPC1-7): E21D9/10; E21D9/00; E21D9/06
Domestic Patent References:
| JP5187191A | ||||
| JP710098U |
Attorney, Agent or Firm:
Toshiki Sugiura (1 outside)
Tsutomu Inoue
Tsutomu Inoue
Previous Patent: MEASURING DEVICE OF DISCHARGED SOIL QUANTITY IN SHIELD MACHINE
Next Patent: BURGLARPROOF PANEL FOR ELECTRONIC EQUIPMENT
Next Patent: BURGLARPROOF PANEL FOR ELECTRONIC EQUIPMENT