Method for replacing cutters of tunnel-excavating machine, method for excavating tunnel, and tunnel excavating machine
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United States of America Patent
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Feb 19, 2002
Grant Date -
N/A
app pub date -
Jul 13, 2000
filing date -
Jul 14, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Cutter spokes are disposed on a cutterhead of a tunnel-excavating machine. Movable blocks, each having a roller cutter, are movably supported by each of the cutter spokes while being connected one another by means of a connection link. A gate mechanism is attached to an end portion of each of the cutter spokes. A machine body is equipped with a roller cutter accommodation box such that through rotation of the cutterhead to a predetermined angular position, the roller cutter accommodation box can be selectively and removably engaged with the end portion of any one of the cutter spokes via the gate mechanism.
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