JPH0332681U - - Google Patents
Info
- Publication number
- JPH0332681U JPH0332681U JP9370689U JP9370689U JPH0332681U JP H0332681 U JPH0332681 U JP H0332681U JP 9370689 U JP9370689 U JP 9370689U JP 9370689 U JP9370689 U JP 9370689U JP H0332681 U JPH0332681 U JP H0332681U
- Authority
- JP
- Japan
- Prior art keywords
- eccentric shaft
- bit
- eccentric
- double
- drilling bit
- 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
Links
- 238000005553 drilling Methods 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims 3
Landscapes
- Earth Drilling (AREA)
Description
第１，２図は実施例を示す一部切欠断面図、第
３図は第１図のＡ−Ａにおける断面図、第４図は
同説明図である。
１……掘削ビツト、２……背面部、３……偏心
シヤフト、４……ケーシングパイプ、５……ハン
マーボデイ、６……先端部、７……偏心孔、８，
９……中心軸線、１０……スプライン溝、１１…
…スプライン、１２……溝、１３……ボール、１
４……地盤、１５……直径、１６……内径、１７
……外径、１８……ビツト、１９……噛合歯。
1 and 2 are partially cutaway sectional views showing the embodiment, FIG. 3 is a sectional view taken along line A-A in FIG. 1, and FIG. 4 is an explanatory view of the same. 1...Drilling bit, 2...Back part, 3...Eccentric shaft, 4...Casing pipe, 5...Hammer body, 6...Tip part, 7...Eccentric hole, 8,
9... Central axis line, 10... Spline groove, 11...
...Spline, 12...Groove, 13...Ball, 1
4...Ground, 15...Diameter, 16...Inner diameter, 17
...outer diameter, 18...bit, 19...meshing tooth.
Claims (1)
ケーシングパイプ内のハンマーボデイの先端部に
設けた偏心孔に挿入し、同掘削ビツトの中心軸線
と同ハンマーボデイの中心軸線とが一致する位置
から同掘削ビツトが同偏心シヤフトを中心として
所定角度だけ回動自在である回動機構を設けたこ
とを特徴とする２重管式掘削ビツト。 ２ 偏心シヤフトと偏心孔との摺動面に互いに螺
合する螺旋状のスプラインとスプライン溝とを設
けたことを特徴とする請求項１記載の２重管式掘
削ビツト。 ３ 偏心シヤフトの外周面及び偏心孔の内周面に
それぞれ螺旋状の溝を設け、同溝同士の間にボー
ルを挟持させたことを特徴とする請求項１又は２
記載の２重管式掘削ビツト。[Scope of Claim for Utility Model Registration] 1. Insert the eccentric shaft provided at the back of the drilling bit into the eccentric hole provided at the tip of the hammer body in the casing pipe, so that the central axis of the drilling bit and the center of the hammer body A double-pipe excavation bit characterized by being provided with a rotation mechanism that allows the excavation bit to rotate by a predetermined angle about the eccentric shaft from a position where the axes coincide with each other. 2. The double-tube excavation bit according to claim 1, characterized in that a sliding surface of the eccentric shaft and the eccentric hole is provided with a spiral spline and a spline groove that are screwed into each other. 3. Claim 1 or 2, characterized in that spiral grooves are provided on the outer circumferential surface of the eccentric shaft and on the inner circumferential surface of the eccentric hole, respectively, and a ball is sandwiched between the grooves.
Double pipe type drilling bit as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9370689U JPH0332681U (en) | 1989-08-08 | 1989-08-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9370689U JPH0332681U (en) | 1989-08-08 | 1989-08-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0332681U true JPH0332681U (en) | 1991-03-29 |
Family
ID=31643074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9370689U Pending JPH0332681U (en) | 1989-08-08 | 1989-08-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0332681U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002125736A (en) * | 2000-10-26 | 2002-05-08 | King Jim Co Ltd | Bag |
| JP2008517735A (en) * | 2005-01-08 | 2008-05-29 | ビルト エヌ ワイ インク | Multiple pack tote device |
-
1989
- 1989-08-08 JP JP9370689U patent/JPH0332681U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002125736A (en) * | 2000-10-26 | 2002-05-08 | King Jim Co Ltd | Bag |
| JP2008517735A (en) * | 2005-01-08 | 2008-05-29 | ビルト エヌ ワイ インク | Multiple pack tote device |
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