JPH0179692U - - Google Patents

Info

Publication number
JPH0179692U
JPH0179692U JP1987172885U JP17288587U JPH0179692U JP H0179692 U JPH0179692 U JP H0179692U JP 1987172885 U JP1987172885 U JP 1987172885U JP 17288587 U JP17288587 U JP 17288587U JP H0179692 U JPH0179692 U JP H0179692U
Authority
JP
Japan
Prior art keywords
outer periphery
attached
enlarged
rotatable
predetermined angle
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.)
Granted
Application number
JP1987172885U
Other languages
English (en)
Other versions
JPH0434233Y2 (ja
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 filed Critical
Priority to JP1987172885U priority Critical patent/JPH0434233Y2/ja
Publication of JPH0179692U publication Critical patent/JPH0179692U/ja
Application granted granted Critical
Publication of JPH0434233Y2 publication Critical patent/JPH0434233Y2/ja
Expired legal-status Critical Current

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  • Earth Drilling (AREA)

Description

【図面の簡単な説明】
第1図はこの考案の実施例を示す正面図、第2
図は同平面図、第3図は普通掘削時の状態を示す
正面図、第4図は拡大掘削時の状態を示す正面図
、第5図は従来の拡大ビツトの正面図である。 1…掘削ロツド、2…ジヨイントロツド、3…
ビツトボデイ、4…掘削羽根、5…ブラケツト、
6…枢軸、7…拡大刃、8…ストツパー、9…ス
トツパー、10…押圧ノツク。

Claims (1)

    【実用新案登録請求の範囲】
  1. 外周に掘削羽根を取付けたビツトボデイをジヨ
    イントロツドの下端に所定角度回転自在に取付け
    、前記ビツトボデイーの外周に上下のブラケツト
    に支持された枢軸に中間部を所定角度回転自在に
    取付けた拡大刃を設け、前記拡大刃の後端部に向
    つて先端部を突出し、基端部を前記ジヨイントロ
    ツドの外周に固定した押圧ノツクを設けてなるこ
    とを特徴とする拡大掘削装置。
JP1987172885U 1987-11-11 1987-11-11 Expired JPH0434233Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987172885U JPH0434233Y2 (ja) 1987-11-11 1987-11-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987172885U JPH0434233Y2 (ja) 1987-11-11 1987-11-11

Publications (2)

Publication Number Publication Date
JPH0179692U true JPH0179692U (ja) 1989-05-29
JPH0434233Y2 JPH0434233Y2 (ja) 1992-08-14

Family

ID=31464834

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987172885U Expired JPH0434233Y2 (ja) 1987-11-11 1987-11-11

Country Status (1)

Country Link
JP (1) JPH0434233Y2 (ja)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5617532Y2 (ja) * 1976-08-03 1981-04-23
JPS5519370A (en) * 1978-07-28 1980-02-12 Tone Boring Co Device for enlarging hole
FR2454006A1 (fr) * 1979-04-12 1980-11-07 Framatome Sa Pompe helico-centrifuge de circulation de fluide
JPS56596U (ja) * 1979-06-15 1981-01-06
JPS601388Y2 (ja) * 1979-08-30 1985-01-16 日東紡音響エンジニアリング株式会社 吸音率測定用残響室
JPS6339621Y2 (ja) * 1980-07-04 1988-10-18
JPS5753514A (en) * 1980-09-17 1982-03-30 Mitsubishi Rayon Co Ltd Preparation of high-impact resin
JPS5976391A (ja) * 1982-10-25 1984-05-01 株式会社利根ボ−リング 空圧打撃式拡孔掘削装置

Also Published As

Publication number Publication date
JPH0434233Y2 (ja) 1992-08-14

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