Shield tunneling with optional section and machine

A machine for shield tunneling with an optional cross section characterized in that the machine comprises:

• a machine body,
• a center cutter supported by the machine body so as to be rotatable about an axis extending in the direction of propulsion of the body,
• a rotary body supported so as to be rotatable about the same axis as the center cutter,
• a planetary cutter supported by the rotary body so as to be movable radially of the rotary body, and
• operating means for moving the planetary cutter radially of the rotary body to permit the planetary cutter to revolve along a locus during the rotation of the rotary body so that the planetary cutter excavates the region between the profile of excavation by the center cutter and the desired profile of excavation,
• wherein the operating means comprises:
• a pivotal member pivotally movably supported by the rotary body at a position away from the axis of rotation thereof and supporting the planetary cutter thereon at a position away from the axis of its pivotal movement,
• a guide member having a guide form in conformity with the desired profile of excavation, and
• regulating means for pressing the movable end of the pivotal member against the guide member for regulating the locus of revolution of the planetary cutter,
• wherein the guide member is a guide rail having an inner periphery shaped in conformity with the desired profile of excavation, and a roller in contact with the inner periphery of the guide rail is mounted on the movable end of the pivotal member.

A machine for shield tunneling with an optional cross section characterized in that the machine comprises:

• a machine body,
• a center cutter supported by the machine body so as to be rotatable about an axis extending in the direction of propulsion of the body,
• a rotary body supported so as to be rotatable about the same axis as the center cutter,
• a planetary cutter supported by the rotary body so as to be movable radially of the rotary body, and
• operating means for moving the planetary cutter radially of the rotary body to permit the planetary cutter to revolve along a locus during the rotation of the rotary body so that the planetary cutter excavates the region between the profile of excavation by the center cutter and the desired profile of excavation,
• wherein the operating means comprises:
• a pivotal member pivotally movably supported by the rotary body at a position away from the axis of rotation thereof and supporting the planetary cutter thereon at a position away from the axis of its pivotal movement,
• a guide member having a guide form in conformity with the desired profile of excavation, and
• regulating means for pressing the movable end of the pivotal member against the guide member for regulating the locus of revolution of the planetary cutter,
• wherein the guide member is an internal gear toothed in conformity with the desired profile of excavation, and a pinion meshing with the internal gear is mounted on the movable end of the pivotal member.

A machine for shield tunneling with an optional cross section characterized in that the machine comprises:

• a machine body,
• a center cutter supported by the machine body so as to be rotatable about an axis extending in the direction of propulsion of the body,
• a rotary body supported so as to be rotatable about the same axis as the center cutter,
• a planetary cutter supported by the rotary body so as to be movable radially of the rotary body, and
• operating means for moving the planetary cutter radially of the rotary body to permit the planetary cutter to revolve along a locus during the rotation of the rotary body so that the planetary cutter excavates the region between the profile of excavation by the center cutter and the desired profile of excavation,
• wherein the operating means comprises:
• a pivotal member pivotally movably supported by the rotary body at a position away from the axis of rotation thereof and supporting the planetary cutter thereon at a position away from the axis of its pivotal movement,
• a guide member having a guide form in conformity with the desired profile of excavation, and
• regulating means for pressing the movable end of the pivotal member against the guide member for regulating the locus of revolution of the planetary cutter,
• wherein the pivotal member comprises:
• a torsion bar,
• a lever secured to the front portion of the torsion bar and rotatably supporting the planetary cutter at its movable end, and
• a control lever secured to the rear portion of the torsion bar and having the pivotal member driving means connected to its movable end.

A machine for shield tunneling with an optional cross section characterized in that the machine comprises:

• a machine body,
• a center cutter supported by the machine body so as to be rotatable about an axis extending in the direction of propulsion of the body,
• a rotary body supported so as to be rotatable about the same axis as the center cutter,
• a planetary cutter supported by the rotary body so as to be movable radially of the rotary body, and
• operating means for moving the planetary cutter radially of the rotary body to permit the planetary cutter to revolve along a locus during the rotation of the rotary body so that the planetary cutter excavates the region between the profile of excavation by the center cutter and the desired profile of excavation,
• wherein the operating means comprises:
• a pivotal member pivotally movably supported by the rotary body at a position away from the axis of rotation thereof and supporting the planetary cutter thereon at a position away from the axis of its pivotal movement,
• a guide member having a guide form in conformity with the desired profile of excavation, and
• regulating means for pressing the movable end of the pivotal member against the guide member for regulating the locus of revolution of the planetary cutter,
• wherein the drive control system comprises:
• a sensor for detecting the actual rotated position of the rotary body,
• a sensor for detecting the moved position of the pivotal member relative to the rotary body,
• a computing unit for calculating the amount of pivotal movement required of the pivotal member relative to the rotational displacement of the rotary body, and
• comparative control means for comparing the displacement received from the pivotal member moved position sensor with the calculated displacement received from the computing unit and controlling the drive of the pivotal member so as to eliminate the difference between the displacements.

A machine for shield tunneling with an optional cross section characterized in that the machine comprises:

• a machine body,
• a center cutter supported by the machine body so as to be rotatable about an axis extending in the direction of propulsion of the body,
• a rotary body supported so as to be rotatable about the same axis as the center cutter,
• a planetary cutter supported by the rotary body so as to be movable radially of the rotary body, and
• operating means for moving the planetary cutter radially of the rotary body to permit the planetary cutter to revolve along a locus during the rotation of the rotary body so that the planetary cutter excavates the region between the profile of excavation by the center cutter and the desired profile of excavation,
• further comprising:
• drive means for driving the rotary body, and
• a drive conversion mechanism for converting the rotation of the rotary body to the rotation of the planetary cutter,
• both the center cutter and the planetary cutter being drivingly rotatably by the drive means.

A machine for shield tunneling with an optional cross section characterized in that the machine comprises:

• a machine body,
• a center cutter supported by the machine body so as to be rotatable about an axis extending in the direction of propulsion of the body,
• a rotary body supported so as to be rotatable about the same axis as the center cutter,
• a planetary cutter supported by the rotary body so as to be movable radially of the rotary body, and
• operating means for moving the planetary cutter radially of the rotary body to permit the planetary cutter to revolve along a locus during the rotation of the rotary body so that the planetary cutter excavates the region between the profile of excavation by the center cutter and the desired profile of excavation,
• wherein said planetary cutter has a rotary shaft, further comprising:
• means for driving the rotary body,
• planetary cutter drive means, and
• a drive transmission for transmitting the torque of the planetary cutter drive means to the rotary shaft of the planetary cutter.