JPH0321717B2 - - Google Patents

Info

Publication number
JPH0321717B2
JPH0321717B2 JP15212686A JP15212686A JPH0321717B2 JP H0321717 B2 JPH0321717 B2 JP H0321717B2 JP 15212686 A JP15212686 A JP 15212686A JP 15212686 A JP15212686 A JP 15212686A JP H0321717 B2 JPH0321717 B2 JP H0321717B2
Authority
JP
Japan
Prior art keywords
excavation
bit
hammer
blocks
rotates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP15212686A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6311789A (ja
Inventor
Norio Kagota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP15212686A priority Critical patent/JPS6311789A/ja
Publication of JPS6311789A publication Critical patent/JPS6311789A/ja
Publication of JPH0321717B2 publication Critical patent/JPH0321717B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP15212686A 1986-06-28 1986-06-28 掘削装置 Granted JPS6311789A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15212686A JPS6311789A (ja) 1986-06-28 1986-06-28 掘削装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15212686A JPS6311789A (ja) 1986-06-28 1986-06-28 掘削装置

Publications (2)

Publication Number Publication Date
JPS6311789A JPS6311789A (ja) 1988-01-19
JPH0321717B2 true JPH0321717B2 (enEXAMPLES) 1991-03-25

Family

ID=15533629

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15212686A Granted JPS6311789A (ja) 1986-06-28 1986-06-28 掘削装置

Country Status (1)

Country Link
JP (1) JPS6311789A (enEXAMPLES)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013227766A (ja) * 2012-04-25 2013-11-07 Mitsubishi Materials Corp 掘削工具

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2036602C (en) * 1990-02-28 2001-04-24 Takeshi Hayashi Excavation tool
JP2574705B2 (ja) * 1990-06-06 1997-01-22 鉱研工業株式会社 リトラクトビット
JP2785477B2 (ja) * 1990-11-02 1998-08-13 三菱マテリアル株式会社 掘削工具
JPH04237794A (ja) * 1991-01-16 1992-08-26 Norio Kagota 掘削方法および掘削装置
JP2530792B2 (ja) * 1992-02-21 1996-09-04 株式会社和工 掘削装置
SE543092C2 (en) * 2018-05-21 2020-10-06 Epiroc Rock Drills Ab System for drill bit change in a drilling rig, drilling rig comprising such a system, and a method for changing drill bits using such a system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013227766A (ja) * 2012-04-25 2013-11-07 Mitsubishi Materials Corp 掘削工具

Also Published As

Publication number Publication date
JPS6311789A (ja) 1988-01-19

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