Title:
CORE COLLECTING DEVICE, BORING DEVICE AND METHOD OF COLLECTING CORE
Document Type and Number:
Japanese Patent JP2019023427
Kind Code:
A
Abstract:
To provide a core collecting device capable of acquiring data for examining the accuracy of a collected core, a boring device using the core collecting device, and a method of collecting a core.SOLUTION: A core collecting device is detachable to one end of a rod of a boring device, and includes a tubular core barrel having a core collecting portion therein for collecting the core of the ground, and a first displacement meter for measuring the displacement of the core entering the core collecting portion. A first displacement gauge is a wire type displacement gauge in which the wire advances and retracts in a direction substantially parallel to an axis of the core barrel in the core collecting portion, and in which a tip of the wire is provided with a contact portion with which the core is in contact. The contact portion includes a contact portion main body and a pressing portion. The pressing portion is provided on the side periphery of the contact portion main body so that the contact portion presses the inner surface of the core barrel and the contact portion is movable in the axial direction of the core barrel inside the core barrel.SELECTED DRAWING: Figure 1
Inventors:
KOMIYA KUNIMORI
MARUI ATSUHISA
YOKOTA SHUICHIRO
SHIMIZU KOJI
MARUI ATSUHISA
YOKOTA SHUICHIRO
SHIMIZU KOJI
Application Number:
JP2018204225A
Publication Date:
February 14, 2019
Filing Date:
October 30, 2018
Export Citation:
Assignee:
HIGHTECH KK
International Classes:
E21B25/00; E02D1/04; G01B5/00
Domestic Patent References:
| JP2014173303A | 2014-09-22 | |||
| JP2003279452A | 2003-10-02 | |||
| JP2008126532A | 2008-06-05 | |||
| JP2007039998A | 2007-02-15 | |||
| JP2004191364A | 2004-07-08 | |||
| JP2001323771A | 2001-11-22 | |||
| JP2002213178A | 2002-07-31 |
Foreign References:
| US20120145457A1 | 2012-06-14 |
Attorney, Agent or Firm:
Hiroaki Kakita