JPH0470388U - - Google Patents
Info
- Publication number
- JPH0470388U JPH0470388U JP9222590U JP9222590U JPH0470388U JP H0470388 U JPH0470388 U JP H0470388U JP 9222590 U JP9222590 U JP 9222590U JP 9222590 U JP9222590 U JP 9222590U JP H0470388 U JPH0470388 U JP H0470388U
- Authority
- JP
- Japan
- Prior art keywords
- bit
- adapter
- drilling
- hole
- attached
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims 4
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Description
第１図は本考案の１実施例の外観図、第２図は
アダプタの右半分を断面であらわした正面図、第
３図ａ，ｂ，ｃは筒状ビツトであるスリツト形成
用ビツトの平面図、右半分を断面であらわした正
面図、および側面図、第４図は使用法の説明図、
第５図は下穴の断面図である。
１……穿孔ビツト、２……アダプタ、３……先
行ビツト、４……スリツト成形用ビツト（筒状ビ
ツト）、８……丸棒部、９……段部、１１……水
孔、１６……通孔、１６ａ……拡径部。
Fig. 1 is an external view of one embodiment of the present invention, Fig. 2 is a front view showing the right half of the adapter in cross section, and Fig. 3 a, b, and c are plan views of the slit forming bit, which is a cylindrical bit. , a front view showing the right half in section, and a side view, Figure 4 is an explanatory diagram of how to use it,
FIG. 5 is a sectional view of the prepared hole. 1...Punching bit, 2...Adapter, 3...Advance bit, 4...Slit forming bit (cylindrical bit), 8...Round bar part, 9...Step part, 11...Water hole, 16 ...Through hole, 16a... Expanded diameter part.
Claims (1)
部に下穴穿孔用の先行ビツトを取り付け、アダプ
タの中間部には該アダプタに嵌合する通孔を有す
る筒状の後続ビツトを嵌着して使用する穿孔ビツ
トにおいて、前記後続ビツトの通孔の後部に他の
部分よりも大口径の拡径部を形成するとともに、
前記アダプタには、当該後続ビツトの拡径部に臨
むエアおよび／又は水の吐出口を設けたことを特
徴とする穿孔ビツト。 A drilling method in which a leading bit for drilling a pilot hole is attached to the tip of an adapter that is attached to a drilling rod, and a cylindrical subsequent bit having a through hole that fits into the adapter is fitted to the middle part of the adapter. In the bit, an enlarged diameter portion having a larger diameter than other portions is formed at the rear of the through hole of the succeeding bit, and
A drilling bit characterized in that the adapter is provided with an air and/or water discharge port facing the enlarged diameter portion of the succeeding bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9222590U JPH0470388U (en) | 1990-08-31 | 1990-08-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9222590U JPH0470388U (en) | 1990-08-31 | 1990-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0470388U true JPH0470388U (en) | 1992-06-22 |
Family
ID=31828517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9222590U Pending JPH0470388U (en) | 1990-08-31 | 1990-08-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0470388U (en) |
-
1990
- 1990-08-31 JP JP9222590U patent/JPH0470388U/ja active Pending