JPS6439497A - Reaming bit for propulsion - Google Patents
Reaming bit for propulsionInfo
- Publication number
- JPS6439497A JPS6439497A JP19370187A JP19370187A JPS6439497A JP S6439497 A JPS6439497 A JP S6439497A JP 19370187 A JP19370187 A JP 19370187A JP 19370187 A JP19370187 A JP 19370187A JP S6439497 A JPS6439497 A JP S6439497A
- Authority
- JP
- Japan
- Prior art keywords
- bit
- reaming bit
- reaming
- hard ground
- teeth
- 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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
PURPOSE: To efficiently excavate general ground and hard ground without changing a reaming bit by providing a bit for general soil and the bit for the hard ground. CONSTITUTION: This reaming bit 1 is composed of the cylindrical main body 1 of a bottomed structure and the guide pipe 12 of a small diameter positioned on an open end side. The front surface of the cylindrical main body 11 is provided with a plurality of sets of the bits for which the two kinds of teeth 2 and a roller bit 3 are one set. During excavation by the reaming bit 1, the roller bit 3 for the hard ground performs excavation preceding the teeth 2 for the general soil at all times. Earth and sand fetched into the reaming bit 1 are discharged by a screw conveyor 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19370187A JPS6439497A (en) | 1987-08-04 | 1987-08-04 | Reaming bit for propulsion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19370187A JPS6439497A (en) | 1987-08-04 | 1987-08-04 | Reaming bit for propulsion |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6439497A true JPS6439497A (en) | 1989-02-09 |
Family
ID=16312348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19370187A Pending JPS6439497A (en) | 1987-08-04 | 1987-08-04 | Reaming bit for propulsion |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6439497A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61151396A (en) * | 1984-12-25 | 1986-07-10 | 株式会社イセキ開発工機 | Shield tunnel excavating apparatus |
JPS61155595A (en) * | 1984-12-28 | 1986-07-15 | 東京瓦斯株式会社 | Drilling head in non-cut-and-cover construction method |
-
1987
- 1987-08-04 JP JP19370187A patent/JPS6439497A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61151396A (en) * | 1984-12-25 | 1986-07-10 | 株式会社イセキ開発工機 | Shield tunnel excavating apparatus |
JPS61155595A (en) * | 1984-12-28 | 1986-07-15 | 東京瓦斯株式会社 | Drilling head in non-cut-and-cover construction method |
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