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Title:
DREDGER
Document Type and Number:
WIPO Patent Application WO/2020/250885
Kind Code:
A1
Abstract:
Provided is a dredger in which a wire is hung vertically from a distal end of a boom that is tiltably supported about a pivot on a hull of the dredger and a bucket device is suspended on the wire, the wire being capable of being wound and unwound by a winch device provided on the hull, the dredger being capable of raking in and excavating soil of an underwater bottom with the bucket device and pumping the soil through a soil transport pipe to a soil storage cite above water, wherein: a boom (B) is tiltably supported about the pivot on a hull (1) and is vertically tiltable underwater; and a wire (W) can be wound and unwound by a winch (2) provided on the hull (1) and can be hung vertically from a distal end (Ba) of the boom (B) while the boom is underwater. As a result, excavation can be conducted efficiently utilizing the deadweight of the bucket device, which is an advantage of a bucket device suspended on a wire, while enabling a solution to the problems of a conventional device in which the wire is hung over a long distance from above the water to the underwater bottom.

Inventors:
KOJIMA TOKUAKI (JP)
MAEDA TAKETOSHI (JP)
Application Number:
PCT/JP2020/022680
Publication Date:
December 17, 2020
Filing Date:
June 09, 2020
Export Citation:
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Assignee:
KOJIMAGUMI CO LTD (JP)
International Classes:
E02F3/88; E02F3/92
Foreign References:
JPS5524368U1980-02-16
JP2010024655A2010-02-04
JP2004150015A2004-05-27
JP2009055661A2009-03-12
JP2003221187A2003-08-05
JP2008274569A2008-11-13
US6823616B12004-11-30
Attorney, Agent or Firm:
OCHIAI & CO. (JP)
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