JPS5838889U - Small hole expansion device - Google Patents

Small hole expansion device

Info

Publication number
JPS5838889U
JPS5838889U JP13338981U JP13338981U JPS5838889U JP S5838889 U JPS5838889 U JP S5838889U JP 13338981 U JP13338981 U JP 13338981U JP 13338981 U JP13338981 U JP 13338981U JP S5838889 U JPS5838889 U JP S5838889U
Authority
JP
Japan
Prior art keywords
small hole
expansion device
hole expansion
expanding device
hole
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.)
Pending
Application number
JP13338981U
Other languages
Japanese (ja)
Inventor
蓑原　克己
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 JP13338981U priority Critical patent/JPS5838889U/en
Publication of JPS5838889U publication Critical patent/JPS5838889U/en
Pending legal-status Critical Current

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  • Earth Drilling (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案実施例の正面図、第２図はＩ−■断面図
、第３図は要部拡大縦断面図である。 １：薬液注入管、２：クラウンビット取付は用パイプ、
３：クラウンビット、４：油圧配管、５：油圧シリンダ
ー、８．　８’　　：可動連結杆、１２．１２′　：拡
孔ビット。FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line I--2, and FIG. 3 is an enlarged longitudinal sectional view of the main part. 1: Chemical injection pipe, 2: Crown bit installation pipe,
3: Crown bit, 4: Hydraulic piping, 5: Hydraulic cylinder, 8. 8': Movable connecting rod, 12.12': Hole expansion bit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] クラウンビット取り付はパイプ内に、対向する半径方向
に拡縮自在な拡孔装置を設けたことを特徴とする小孔径
孔の拡孔装置。A hole expanding device for a small hole, characterized in that a crown bit is installed in a pipe with a hole expanding device that can be freely expanded and contracted in opposing radial directions.
JP13338981U 1981-09-08 1981-09-08 Small hole expansion device Pending JPS5838889U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13338981U JPS5838889U (en) 1981-09-08 1981-09-08 Small hole expansion device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13338981U JPS5838889U (en) 1981-09-08 1981-09-08 Small hole expansion device

Publications (1)

Publication Number Publication Date
JPS5838889U true JPS5838889U (en) 1983-03-14

Family

ID=29926851

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13338981U Pending JPS5838889U (en) 1981-09-08 1981-09-08 Small hole expansion device

Country Status (1)

Country Link
JP (1) JPS5838889U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01111983A (en) * 1987-10-23 1989-04-28 Mitsubishi Heavy Ind Ltd Grip drive for excavator
JPH03221697A (en) * 1990-01-26 1991-09-30 Mitani Sekisan Co Ltd Method and apparatus for opening and closing excavating bit to expand bottom
JP2020148053A (en) * 2019-03-15 2020-09-17 大成建設株式会社 Underground diameter expansion device and diameter expansion part forming method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01111983A (en) * 1987-10-23 1989-04-28 Mitsubishi Heavy Ind Ltd Grip drive for excavator
JPH03221697A (en) * 1990-01-26 1991-09-30 Mitani Sekisan Co Ltd Method and apparatus for opening and closing excavating bit to expand bottom
JP2020148053A (en) * 2019-03-15 2020-09-17 大成建設株式会社 Underground diameter expansion device and diameter expansion part forming method

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