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    • 25. 发明专利
    • TUNNEL BORING MACHINE AND BORING METHOD
    • JPH10131681A
    • 1998-05-19
    • JP29229196
    • 1996-11-05
    • MITSUBISHI HEAVY IND LTDTAISEI CORP
    • TSUJI YOSHITAROINOUE TOSHIFUMIBESSHO TOSHIHIKOINO TOSHIMI
    • E21D9/087E21D9/08E21D9/12
    • PROBLEM TO BE SOLVED: To improve workability by supporting a cutter head on a front end part of a cylindrical boring machine main body free to oscillate on its flat surface and providing a projection to crush gravels in an outer periphery of the cutter head against an inner surface of the boring machine main body. SOLUTION: A tunnel boring machine has cutter drive devices 13, 14 as an oscillating support mechanism on upper and lower parts of a front part bulkhead 12 of a square cross-sectional cylindrical boring machine main body 11, and a cutter head 17 is connected to head end parts of output shafts 15, 16 decentered by specified quantity of the devices 13, 14 free to revolve. The head 17 is square, a large number of cutter bits 18 are provided on its front surface, and a plural number of cutters 20 for gravel crushing are provided on a projected body 19 fixed on a lower part rear surface. When the main body 11 is made to advance while oscillating the head 17 within the flat surface by rotating the shafts 15, 16 by the drive devices 13, 14, the foundation is drilled in a scquare cross-section by the bits 18, and gravels produced move downward and reach a front part of the main body 11 and crushed by the cutters 20. Consequently, it is possible to smoothly drill a tunnel by certainly crushing the gravels in a short period of time.
    • 30. 发明专利
    • TUNNEL EXCAVATOR
    • JPH1171985A
    • 1999-03-16
    • JP23191997
    • 1997-08-28
    • MITSUBISHI HEAVY IND LTDTAISEI CORP
    • INOUE TOSHIFUMITANAKA JUNICHIBESSHO TOSHIHIKOINO TOSHIMIUNOSAWA FUMIO
    • E21D9/06E21D9/08E21D9/087
    • PROBLEM TO BE SOLVED: To render the cross-sectional configuration changeable readily by making a pair of reversed C-shape frames into square cylinders, setting them to be movable to and away from each other by rendering its width adjustable by a jack, and attaching cutters being shifted in its rotation phase on the front side. SOLUTION: The excavator main body 11 is formed into a substantial square by fitting frames 12, 13 having its reversed C-shape cross-section, and a pair of upper and lower support sleeves 15, 16 are fastened within the frames 12, 13, and then a width controlling jack 17 is disposed therein. Bulk heads are secured left and right respectively on the frames 12, 13, and rotational shafts 22, 23 are supported rotatably at the front side. On the rotational shafts 22, 23. excavation arms 24, 25 are fixed at both sides in the horizontal direction, and cutters 26, 27 are fastened at the front part. The excavation arm 24 of the rotational shaft 22 and the excavation arm 25 of the rotational shaft 23 are installed by shifting the attachment angle at 90 degrees, and the excavation arms 24, 25 located at the intermediate position are installed in a shifted manner in the upper and lower direction as well. Thus, the frames are made expansible and contractible, and the rotational shafts are rendered movable to and away from each other, so that the tunnel can be changed in its cross-sectional configuration.