Other

Mitsubishi Jukogyo Kabushiki Kaisha

Taisei Corporation

Masahiko Sugiyama

Kenichi Kaneko

Toshihiko Bessho

Toshihumi Inoue

Yoshihiro Uchiyama

Tsunematsu Mukaidani

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.

Method for replacing cutters of tunnel-excavating machine, method for excavating tunnel, and tunnel excavating machine

A turnable tunnel excavator and tunneling method are provided which can alternate between construction of a main tunnel A and crosscuts B, and can excavate other tunnels without having to pass through an arc. It is comprised of a main machine and an ancillary machine housed inside a pivotable housing within the said main machine and how to operate such a machine.

Main-ancillary tunnel excavator

Growing community of inventors

Kobe, Japan

Masahiko Sugiyama