JPH0280188U - - Google Patents
Info
- Publication number
- JPH0280188U JPH0280188U JP16033688U JP16033688U JPH0280188U JP H0280188 U JPH0280188 U JP H0280188U JP 16033688 U JP16033688 U JP 16033688U JP 16033688 U JP16033688 U JP 16033688U JP H0280188 U JPH0280188 U JP H0280188U
- Authority
- JP
- Japan
- Prior art keywords
- bit
- casing
- hammer
- outer diameter
- 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.)
- Granted
Links
- 238000009412 basement excavation Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims 1
- 238000007664 blowing Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Description
第１図は本考案の第１の請求項の一実施例を示
す断面図、第２図はその正面図、第３図は本考案
の第(2)の請求項の一実施例を示す断面図、第４
図はその正面図である。
１……ケーシング、２……ダミービツト、２ａ
……ローラービツト、１０……打撃装置、１３…
…ビツト、１３ａ……掘削部、１４ａ……ゲージ
チツプ。
Fig. 1 is a sectional view showing an embodiment of the first claim of the present invention, Fig. 2 is a front view thereof, and Fig. 3 is a sectional view showing an embodiment of the claim (2) of the present invention. Figure, 4th
The figure is its front view. 1...Casing, 2...Dummy bit, 2a
...Roller bit, 10...Blowing device, 13...
...bit, 13a...excavation section, 14a...gauge chip.
Claims (1)
と、 該ケーシングの軸心に対し偏心して配設され、
回転自在で、かつ外径が掘削孔に内接すると共に
該偏心掘削半径より大なる外径を有するビツトと
、該ビツトを打撃するハンマーと、該ハンマーを
圧気により往復動させるバルブ機構とを具備した
１本の打撃装置と、 該打撃装置と前記ケーシングの軸心をへだてて
相対した位置に配設されたダミービツトより成る
ことを特徴とする偏心形ダウンザホールドリル。 (2) ドリルロツド先端に連結されたケーシング
と、 該ケーシングの軸心に対し偏心した位置に配設
され、回転自在で、かつ外径が掘削孔に内接する
と共に該掘削孔半径より大なる外径を有するビツ
トと、該ビツトを打撃するハンマーと、該ハンマ
ーを圧気により往復動させるバルブ機構とを具備
した１本の打撃装置と、 該打撃装置と前記ケーシングの軸心をへだてて
相対した位置に配設された回転自在なローラービ
ツトより成ることを特徴とする偏心形ダウンザホ
ールドリル。[Claims for Utility Model Registration] (1) A casing connected to the tip of a drill rod, eccentrically arranged with respect to the axis of the casing,
The bit is rotatable and has an outer diameter inscribed in the excavation hole and has an outer diameter larger than the eccentric drilling radius, a hammer that strikes the bit, and a valve mechanism that reciprocates the hammer using pressurized air. An eccentric down-the-hole drill comprising: a single striking device; and a dummy bit disposed at a position facing away from the striking device and the axis of the casing. (2) A casing connected to the tip of the drill rod, which is arranged eccentrically with respect to the axis of the casing, is rotatable, has an outer diameter inscribed in the drilled hole, and has an outer diameter larger than the radius of the drilled hole. a striking device comprising: a bit having a cylindrical shape; a hammer for striking the bit; and a valve mechanism for reciprocating the hammer using air pressure; An eccentric down-the-hole drill characterized by a rotatable roller bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988160336U JPH0547817Y2 (en) | 1988-12-12 | 1988-12-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988160336U JPH0547817Y2 (en) | 1988-12-12 | 1988-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0280188U true JPH0280188U (en) | 1990-06-20 |
| JPH0547817Y2 JPH0547817Y2 (en) | 1993-12-16 |
Family
ID=31442315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988160336U Expired - Lifetime JPH0547817Y2 (en) | 1988-12-12 | 1988-12-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0547817Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57133690U (en) * | 1981-02-06 | 1982-08-20 | ||
| JPS63167889A (en) * | 1986-12-27 | 1988-07-11 | 株式会社 利根ボ−リング | Multi-air hammer device |
-
1988
- 1988-12-12 JP JP1988160336U patent/JPH0547817Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57133690U (en) * | 1981-02-06 | 1982-08-20 | ||
| JPS63167889A (en) * | 1986-12-27 | 1988-07-11 | 株式会社 利根ボ−リング | Multi-air hammer device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0547817Y2 (en) | 1993-12-16 |
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