ERECTOR FOR SMALL-DIAMETER SHIELD

ERECTOR FOR SMALL-DIAMETER SHIELD

PROBLEM TO BE SOLVED: To provide an erector for a small-diameter shield which can stably support a segment.SOLUTION: The erector 1 for the small-diameter shield includes: a revolving frame 3 which is provided in a coaxially revolvable manner in a shield body 2; a segment gripping portion 6 which is...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OSADA MASAO, YOSHIDA YUZURU
Format: Patent
Sprache:eng
Schlagworte:
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide an erector for a small-diameter shield which can stably support a segment.SOLUTION: The erector 1 for the small-diameter shield includes: a revolving frame 3 which is provided in a coaxially revolvable manner in a shield body 2; a segment gripping portion 6 which is provided in the revolving frame 3 in such a manner as to be radially movable via a link mechanism 4, and detachably grips the segment 5; and a support 7 which is provided at the segment gripping portion 6, and abuts on the segment 5 so as to support the segment 5 gripped by the segment gripping portion 6. The support 7 is equipped with a spring 27 for resiliently urging the segment 5.