Excavation tool replacement device and tunnel boring machine
AssigneeUnderground Infrastructure Technologies Corporation
InventorYasuharu Hanaoka
Life of this patent
Estimating the term…
Abstract
A guide of an excavation tool replacement device includes an inner guide member configured to guide advancing and retreating of an excavation tool, and an outer guide member configured to support the inner guide member such that the inner guide member is movable to a face side and an anti-face side. The inner guide member has, at a face side end thereof, a first sealing member configured to come into close contact with a gate plate from the anti-face side.
Claims6
An excavation tool replacement device of a tunnel boring machine, the tunnel boring machine comprising a rotatable cutter head and an excavation tool provided on a front surface of the cutter head, the excavation tool replacement device comprising:
- the excavation tool configured to be attachable and detachable;
- a front plate comprising an opening configured to open to a face side of the cutter head, the opening being configured to allow the excavation tool to pass therethrough;
- a guide configured to support the excavation tool such that the excavation tool advances and retreats through the opening;
- and
- a gate plate provided between the front plate and the guide, the gate plate being configured to be slidable along the front plate, the gate plate being configured to open and close the opening,
- wherein the guide includes an inner guide member configured to guide the advancing and retreating of the excavation tool, and an outer guide member configured to support the inner guide member such that the inner guide member is movable to the face side and an anti-face side,
- wherein the inner guide member has, at a face side end thereof, a first sealing member configured to come into close contact with the gate plate from the anti-face side, and
- wherein the excavation tool is attached to a tip end of a tool holder arranged in the inside of the inner guide member.
A tunnel boring machine comprising:
- a cutter head and an excavation tool provided on a front surface of the cutter head;
- a cutter drive configured to rotate the cutter head;
- and
- an excavation tool replacement device configured to support the excavation tool such that the excavation tool is replaceable,
- wherein the excavation tool replacement device includes:
- the excavation tool configured to be attachable and detachable;
- a front plate comprising an opening configured to open to a face side of the cutter head, the opening being configured to allow the excavation tool to pass therethrough;
- a guide configured to support the excavation tool such that the excavation tool advances and retreats through the opening;
- and
- a gate plate provided between the front plate and the guide, the gate plate being configured to be slidable along the front plate, the gate plate being configured to open and close the opening,
- the guide includes an inner guide member configured to guide the advancing and retreating of the excavation tool, and an outer guide member configured to support the inner guide member such that the inner guide member is movable to the face side and an anti-face side,
- wherein the inner guide member has, at a face side end thereof, a first sealing member configured to come into close contact with the gate plate from the anti-face side, and
- wherein the excavation tool is attached to a tip end of a tool holder arranged in the inside of the inner guide member.
Dependencies are inferred from the claim text.