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Title:
METHOD FOR MANUFACTURING PROPELLING PIPE UNIT
Document Type and Number:
Japanese Patent JP3679361
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To enhance manufacturing efficiency and handleability by unifying propelling pipes having long and short dimensions suitable for sharp curve propulsion.
SOLUTION: This propelling pipe unit is constituted by arranging a plurality of steel pipe reinforcing type propelling pipes each having an insertion port at one end thereof and a receiving port at the other end thereof, so as to mutually fit the insertion ports 13 and receiving ports 14 of the respective propelling pipes. Cushioning materials 17 are interposed between the insertion port end plates 6 and receiving port end plates 7 of the respective propelling pipes 1, while holding the interval between the end plates 6 and 7 to an interval S set at the time of centrifugal molding, and the respective propelling pipes 1 are integrally connected to each other by connection bars 16 to be fed to an execution site from a factory as they are.


Inventors:
Tsuyoshi Miyahara
Nobe
Application Number:
JP2001335097A
Publication Date:
August 03, 2005
Filing Date:
October 31, 2001
Export Citation:
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Assignee:
Kurimoto Concrete Industry Co., Ltd.
International Classes:
E21D9/06; B28B21/30; F16L1/024; (IPC1-7): B28B21/30; E21D9/06; F16L1/024
Domestic Patent References:
JP9032471A
JP2001246613A
JP7109887A
JP11062473A
Attorney, Agent or Firm:
Bunji Kamada
Higashio Masahiro
Torii Kazuhisa