Title:
FORM FOR MANUFACTURING SEGMENT
Document Type and Number:
Japanese Patent JP3481789
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To form a through hole for connecting at a segment without using a sheath tube.
SOLUTION: Since taper pins 7, 8, 10, 11 are clamped at side plates 2, 3 or end plates 4, 5 by clamping threaded parts 7c, 8c, 10c, 11c of base ends at a nut 13 and recesses 8b, 11b are engaged with protruding parts 7a, 10a of ends, a predetermined state is not collapsed in the case of placing concrete C. After the placed concrete C is solidified, the parts 7c, 8c, 10c, 11c of the pins 7, 8, 10, 11 are loosened, the pins are externally drawn from side plates 2, 3 or end plates 4, 5, the side plates 2, 3 and the end plates 4, 5 are separately moved, and obtained segment S is released. Tapered through holes Sh, Si gradually reduced in diameter from both ends toward centers are formed by drawing the pins 7, 8, 10, 11.
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Inventors:
Kenji Arakawa
Koji Shiraishi
Hiroki Someya
Akio Hashiguchi
Koji Shiraishi
Hiroki Someya
Akio Hashiguchi
Application Number:
JP23706996A
Publication Date:
December 22, 2003
Filing Date:
September 06, 1996
Export Citation:
Assignee:
Okumura Gumi Co., Ltd.
Ishikawajima Building Materials Industry Co., Ltd.
Ishikawajima Building Materials Industry Co., Ltd.
International Classes:
B28B7/10; B28B7/18; B28B23/00; B28B23/22; E21D11/08; (IPC1-7): B28B7/18; B28B7/10; B28B23/00; E21D11/08
Domestic Patent References:
| JP716811A | ||||
| JP7317496A | ||||
| JP768526A | ||||
| JP4978549U |
Attorney, Agent or Firm:
Masatake Shiga (2 outside)