JP2531078Y2 - 掘削装置 - Google Patents

掘削装置

Info

Publication number
JP2531078Y2
JP2531078Y2 JP1990043848U JP4384890U JP2531078Y2 JP 2531078 Y2 JP2531078 Y2 JP 2531078Y2 JP 1990043848 U JP1990043848 U JP 1990043848U JP 4384890 U JP4384890 U JP 4384890U JP 2531078 Y2 JP2531078 Y2 JP 2531078Y2
Authority
JP
Japan
Prior art keywords
wedge
drill
hole
rock
drilling
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 - Lifetime
Application number
JP1990043848U
Other languages
English (en)
Japanese (ja)
Other versions
JPH044988U (cs
Inventor
金子　　豊
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.)
Koken Boring Machine Co Ltd
Original Assignee
Koken Boring Machine Co Ltd
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 Koken Boring Machine Co Ltd filed Critical Koken Boring Machine Co Ltd
Priority to JP1990043848U priority Critical patent/JP2531078Y2/ja
Publication of JPH044988U publication Critical patent/JPH044988U/ja
Application granted granted Critical
Publication of JP2531078Y2 publication Critical patent/JP2531078Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
JP1990043848U 1990-04-24 1990-04-24 掘削装置 Expired - Lifetime JP2531078Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990043848U JP2531078Y2 (ja) 1990-04-24 1990-04-24 掘削装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990043848U JP2531078Y2 (ja) 1990-04-24 1990-04-24 掘削装置

Publications (2)

Publication Number Publication Date
JPH044988U JPH044988U (cs) 1992-01-17
JP2531078Y2 true JP2531078Y2 (ja) 1997-04-02

Family

ID=31556619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990043848U Expired - Lifetime JP2531078Y2 (ja) 1990-04-24 1990-04-24 掘削装置

Country Status (1)

Country Link
JP (1) JP2531078Y2 (cs)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6233829Y2 (cs) * 1981-04-24 1987-08-29
JPS61233197A (ja) * 1985-04-08 1986-10-17 玉田　真作育 掘削機

Also Published As

Publication number Publication date
JPH044988U (cs) 1992-01-17

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