Title:
地盤削孔ドリルの制御方法
Document Type and Number:
Japanese Patent JP6926441
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a control method of a ground boring drill capable of surely detecting that the ground boring drill has come into contact with foreign objects while boring a hole in a ground without being limited to soil properties of a ground to be bored and kinds of buried objects, and capable of stopping operation of the ground boring drill.SOLUTION: The method comprises drilling a hole in a ground using a ground boring drill comprising a drill blade body that is rotated by an electric motor while measuring continuously an actual measured value of a current supplied to the electric motor, comparing a latest actual measured value of the current and a management reference value, and stopping operation of the ground boring drill when the latest actual measured value of the current exceeds an absolute value of the maximum capacity that is predetermined with respect to the management reference value.SELECTED DRAWING: Figure 1
Inventors:
Takuo Mori
Akatsuki Doi
Masao Kuroiwa
Masahiro Tatemoto
Takayoshi Numazaki
Akatsuki Doi
Masao Kuroiwa
Masahiro Tatemoto
Takayoshi Numazaki
Application Number:
JP2016211111A
Publication Date:
August 25, 2021
Filing Date:
October 27, 2016
Export Citation:
Assignee:
Obayashi Corporation
International Classes:
E02D1/00; E21B44/04
Domestic Patent References:
| JP2009061749A | ||||
| JP1284691A | ||||
| JP2008127938A | ||||
| JP2002051586A | ||||
| JP62280411A | ||||
| JP62220691A | ||||
| JP8135362A |
Foreign References:
| KR101471410B1 |
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation