Title:
TUNNEL EXCAVATION APPARATUS
Document Type and Number:
Japanese Patent JP2021188257
Kind Code:
A
Abstract:
To provide a tunnel excavation apparatus capable of suitably disposing a support member in an excavation path K when the curved excavation path is formed.SOLUTION: A tunnel excavation apparatus includes a front barrel portion and an erector device. The front barrel portion includes a cutter head, and a cutter head support 22 that rotatably supports the cutter head. The erector device is provided at the cutter head support 22. The erector device includes a rotary ring that holds a support member S, and a posture change device 32. The posture change device 32 is configured such that a yaw-angle α formed by a rotation axis C2 of the rotary ring and a rotation axis C1 of the cutter head in a plan view can be changed.SELECTED DRAWING: Figure 5B
Inventors:
SEKIYAMA NAOKI
ASANO HIROSHI
ASANO HIROSHI
Application Number:
JP2020090878A
Publication Date:
December 13, 2021
Filing Date:
May 25, 2020
Export Citation:
Assignee:
KOMATSU MFG CO LTD
International Classes:
E21D9/11; E21D11/40
Attorney, Agent or Firm:
Shinki Global IP Patent Corporation
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