Title:
PROTECTION STRUCTURE OF AIR PIPE
Document Type and Number:
Japanese Patent JP2000028041
Kind Code:
A
Abstract:
To provide a protection structure of an air pipe capable of protecting the air pipe from a tunnel trolley running in a tunnel without troublesome and time-consuming protection work by a worker.
This protection structure of an air pipe 4 protects the air pipe 4 from a tunnel trolley 3 running in a tunnel. The protection structure corresponds to a shape of a peripheral surface of the air pipe 4, and comprises a curved-face-forming member 11. The curved-face-forming member 11 is integrated with the tunnel trolley 3 and forms a curve face of a crossing curve shape having a diameter greatly changed, as it approaches to a longitudinal free edge portion.
Inventors:
YOSHITOMI YUKIO
MORINAGA TAKAYUKI
MIURA YASUFUMI
MORINAGA TAKAYUKI
MIURA YASUFUMI
Application Number:
JP19889498A
Publication Date:
January 25, 2000
Filing Date:
July 14, 1998
Export Citation:
Assignee:
TAISEI CORP
International Classes:
B61B13/10; F16L3/18; (IPC1-7): F16L3/18; B61B13/10
Attorney, Agent or Firm:
Dozo Isono