To improve efficiency of propulsion transmission by increasing area of contact part of joint end faces of adjacent propulsive box bodies in a tunnel curved section.
The propulsive box body 1 is composed of horizontal wall parts 11, 12 and vertical wall parts 13, 14 and is formed like a rectangular frame. This propulsive box body structure is constituted by arranging a plurality of propulsive box bodies 1, 1 in series and abutting joint end faces 1a, 1b of the propulsive box bodies 1 mutually for propulsion. The propulsive box body 1 is provided with a thrust transmission member 10 having elasticity in a scope of the whole front joint end face 1a. The thrust transmission member 10 is constituted by forming a horizontal wall projecting part 10A protruding a central part in the transverse direction in the horizontal wall parts 11, 12. The thrust transmission member 10 can contract and restore while the horizontal wall projecting part 10A is abutted on the rear joint end face 1b.
MORITA TAIJI
TAKAKURA KATSUHIKO
HASHIMOTO HIROHIDE
WAKABAYASHI MASANORI
SHINDO YOSHINORI
ISHIKAWAJIMA KENZAI KOGYO KK
| JP2007070938A | 2007-03-22 | |||
| JPH0932471A | 1997-02-04 | |||
| JP2000291379A | 2000-10-17 |
Tadashi Takahashi
Takashi Watanabe
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
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