Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
STEP PROCESSING METHOD FOR DRILLING HOLE
Document Type and Number:
Japanese Patent JP2014177794
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a step processing method for drilling hole that can solve a problem in which a conventional step processing method for drilling hole requires a bucket for drilling dedicated to a diameter expansion part and is thereby high in manufacture cost and construction cost and long in construction period.SOLUTION: A step processing device 1 for drilling hole is constituted which comprises: a rod suspended from a kelly-bar; a bucket for drilling provided at a lower end part of the rod; an expansion blade which is provided on the rod, and swings to be made compact within a diameter range of the bucket for drilling when stored, and projects and swings from the diameter range of the bucket for drilling when expanded to obliquely drill a step part of a hole wall through rotation of the kelly-bar; and a swing driving device provided on the rod so as to make the expansion blade swing. In a step processing device for drilling hole, the step processing device for drilling device 1 drills a step part formed in a drilling hole in a tapered shape with the enlargement blade 5.

Inventors:
SANO DAISAKU
TAGUCHI TOMOYA
MORI TAKESHI
OGAWA ATSUSHI
IIDA TSUTOMU
HATTORI KEISHO
FUJIKI HIDENORI
KAWANISHI YUKI
KOBAYASHI KOJI
ENOMOTO TAKESHI
YAJIMA JUNJI
NAKAZAWA FUTA
MIYAMOTO KAZUYUKI
YAMADA MASAKI
ARAI TOSHIAKI
TAKAHASHI KOJI
MATSUKI KAZUHIKO
MIYATA KATSUTOSHI
Application Number:
JP2013051602A
Publication Date:
September 25, 2014
Filing Date:
March 14, 2013
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TODA CONSTRUCTION
KUMAGAI GUMI CO LTD
JAPAN PILE CORP
TAIYO KISO KK
DAIHO CONSTRUCTION CO LTD
TOKYU KENSETSU KK
TOYO TECHNO CORP
NISHIMATSU CONSTR CO LTD
SUMITOMO MITSUI CONSTR CO LTD
International Classes:
E02D15/06; E02D5/34
Domestic Patent References:
JP2009068301A2009-04-02
JP2003074285A2003-03-12
JPH05179880A1993-07-20
JP2003227136A2003-08-15
Attorney, Agent or Firm:
Patent business corporation Tokyo Alpa patent firm