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Patent Searching and Data


Title:
SCREW CONVEYOR
Document Type and Number:
Japanese Patent JPH09112186
Kind Code:
A
Abstract:

To increase the durability of a screw conveyor in a shield machine, by fitting protective plates at the inner peripheral face of the easing and fitting abrasion-resistant protective plates at the surface of the blades.

A plurality of abrasion-resistant protective plates 38 having almost the same length with the easing 31 are fitted along the inner peripheral face of the casing 31. Spiral blades 33 are fitted to the rotary shaft 32 and an abrasion-resistant protective plate 39 is fixed to the face transferring the excavated soil taken into the casing 31 to the rear part. The protective plate 39 is bent three-dimensionally to correspond to the shape of blades 33 and shaped to form a short plate. A plurality of protective plates are fixed to the surface of the blades 33 along the longitudinal direction. In this way, the surface of blades 33 is protected from abrasion owing to the excavated soil including hard stones and the outer peripheral ends of the blades 33 and the inner peripheral face of the easing 31 are protected from the contact or collision with soil by the guide at the outer peripheral ends of the blades 33.


Inventors:
MIURA MASAAKI
NAGASHIMA YOSHIKI
OGAMI KAZUO
KAMIMURA JOJI
Application Number:
JP26655295A
Publication Date:
April 28, 1997
Filing Date:
October 16, 1995
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
E21D9/12; (IPC1-7): E21D9/12
Attorney, Agent or Firm:
光石 俊郎 (外2名)