JPH0346589U - - Google Patents
Info
- Publication number
- JPH0346589U JPH0346589U JP10694389U JP10694389U JPH0346589U JP H0346589 U JPH0346589 U JP H0346589U JP 10694389 U JP10694389 U JP 10694389U JP 10694389 U JP10694389 U JP 10694389U JP H0346589 U JPH0346589 U JP H0346589U
- Authority
- JP
- Japan
- Prior art keywords
- kelly bar
- groove
- torque
- cylindrical
- protrusion
- 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
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 claims 1
Landscapes
- Earth Drilling (AREA)
Description
第１図〜第４図は本考案の第１の実施例を説明
するもので、第１図〜第３図は第４図の−線
、−線断面図、−線断面図、第４図はケ
リーバ装置のトルク伝達部の縦断面図である。第
５図〜第７図は従来例を説明するもので、第５図
はケリーバ装置の縦断面図、第６図、第７図はそ
の−線、−線断面図である。
１……インナケリーバ、２……セカンドケリー
バ、３……サードケリーバ、４……アウタケリー
バ、５……バー、６……角溝、８……排水孔、２
１ａ〜２１ｃ……緩衝材、２３……排水用通路、
７０……排水用円形溝。
1 to 4 illustrate a first embodiment of the present invention, and FIGS. 1 to 3 are a sectional view taken along the line -, -, sectional view taken along the - line in FIG. FIG. 2 is a longitudinal cross-sectional view of the torque transmission section of the Kerryba device. 5 to 7 illustrate a conventional example, in which FIG. 5 is a longitudinal cross-sectional view of the Keliva device, and FIGS. 6 and 7 are cross-sectional views thereof along the - line and - line. 1...Inner keel bar, 2...Second keel bar, 3...Third kelly bar, 4...Outer keel bar, 5...Bar, 6...Square groove, 8...Drain hole, 2
1a to 21c...buffer material, 23...drainage passage,
70... Circular groove for drainage.
Claims (1)
は丸棒状の第１のケリーバと、この第１のケリー
バが伸縮可能に挿入され一端部側の内周面に前記
突部と噛合するトルク伝達用溝が刻設され、該溝
と位相をずらし排水用溝が軸方向に刻設されると
ともに該排水溝の下端部は円筒内部から外部へ連
通する排水孔に連通する円筒状の第２のケリーバ
とを少なくとも有し、最も内側のケリーバの先端
に掘削バケツトを装着すると共に、最も外側のケ
リーバからトルクを入力し前記突部と溝との噛合
により最も内側のケリーバにトルクを伝達して前
記掘削バケツトを回転駆動するケリーバ装置にお
いて、 前記排水用溝の横断面形状を円弧状にしたこと
を特徴とするケリーバ装置。[Claims for Utility Model Registration] A cylindrical or round rod-shaped first kelly bar with a torque transmitting protrusion on its outer circumferential surface, and a first kelly bar that is extendably inserted into the inner periphery of one end. A torque transmission groove that engages with the protrusion is carved, and a drainage groove is carved in the axial direction out of phase with the groove, and the lower end of the drainage groove is connected to a drainage hole communicating from the inside of the cylinder to the outside. It has at least a second cylindrical kelly bar that communicates with the cylindrical second kelly bar, and a digging bucket is attached to the tip of the innermost kelly bar, and a torque is input from the outermost kelly bar to engage the protrusion and the groove to open the innermost kelly bar. A kelly bar device that rotationally drives the excavation bucket by transmitting torque to a kelly bar, characterized in that the cross-sectional shape of the drainage groove is arcuate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10694389U JPH0527590Y2 (en) | 1989-09-12 | 1989-09-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10694389U JPH0527590Y2 (en) | 1989-09-12 | 1989-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0346589U true JPH0346589U (en) | 1991-04-30 |
| JPH0527590Y2 JPH0527590Y2 (en) | 1993-07-14 |
Family
ID=31655663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10694389U Expired - Lifetime JPH0527590Y2 (en) | 1989-09-12 | 1989-09-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0527590Y2 (en) |
-
1989
- 1989-09-12 JP JP10694389U patent/JPH0527590Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0527590Y2 (en) | 1993-07-14 |