CUTTER BIT SUPPORT STRUCTURE

To provide a cutter bit support structure capable of advancing the cutter bit by an arbitrary amount.SOLUTION: The cutter bit support structure includes a cutter bit 22, a tubular body 3 attached to cutter spokes 12, and a bottom plate 5 attached to the tubular body 3. The cutter bit 22 includes a p...

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Bibliographic Details
Main Authors MASUDA MASAAKI, NOMOTO KOSUKE, ODA MAKOTO, KISHIMOTO KIMITERU, FUKUOKA AKANE
Format Patent
LanguageEnglish
Japanese
Published 28.10.2021
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Summary:To provide a cutter bit support structure capable of advancing the cutter bit by an arbitrary amount.SOLUTION: The cutter bit support structure includes a cutter bit 22, a tubular body 3 attached to cutter spokes 12, and a bottom plate 5 attached to the tubular body 3. The cutter bit 22 includes a piston portion 22a slidably held by the tubular body 3 and a blade portion 22b protruding from the cutter spokes 12. The bottom plate 5 forms an operating chamber 4 with the piston portion 22a, and the bottom plate 5 is provided with an injection port 51 for injecting a working fluid into the operating chamber 4. A rod 8 extends from the piston portion 22a of the cutter bit 22 and penetrates the bottom plate 5. The rod 8 is configured so that the relative position with respect to the bottom plate 5 can be fixed.SELECTED DRAWING: Figure 2 【課題】カッタービットを任意の量だけ進出させることができるカッタービットの支持構造を提供する。【解決手段】カッタービット支持構造は、カッタービット２２と、カッタースポーク１２に取り付けられた筒状体３と、筒状体３に取り付けられた底板５を含む。カッタービット２２は、筒状体３に摺動可能に保持されたピストン部２２ａと、カッタースポーク１２から突出する刃部２２ｂを含む。底板５はピストン部２２ａとの間に作動室４を形成し、底板５には作動室４へ作動流体を注入するための注入口５１が設けられている。カッタービット２２のピストン部２２ａからはロッド８が延び、底板５を貫通している。ロッド８は、底板５に対する相対位置が固定可能に構成されている。【選択図】図２
Bibliography:Application Number: JP20200073373