Title:
ROD CONNECTING METHOD FOR PILE DRIVER AND ROD
Document Type and Number:
Japanese Patent JP3385418
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To perform rod connecting work on the ground without carrying out works at elevated level.
SOLUTION: A male joint 6a of a lifted lower rod 6 is connected to a female joint 5c of an upper rod 5 in the upper part of a leader 3. A chuck groove 5b of the upper rod 5 is disengaged from a chuck member 4b of a rod rotating drive unit 4. The chuck member 4b is engaged with a chuck groove 6b of the lower rod 6. A joint portion is lowered to the lower part of the leader 3. The lower rod 6 is disengaged from the chuck member 4b, which is engaged with the chuck groove 5b. Connecting pins 13, 13 are inserted into pinholes 8, 8 formed in both joints.
Inventors:
Takanori Yamazaki
Katsuhito Tanaka
Katsuhito Tanaka
Application Number:
JP2000139110A
Publication Date:
March 10, 2003
Filing Date:
May 11, 2000
Export Citation:
Assignee:
Nippon Vehicle Manufacturing Co., Ltd.
International Classes:
E21B17/04; E02D3/12; (IPC1-7): E02D3/12; E21B17/04
Domestic Patent References:
| JP7279154A | ||||
| JP7133614A | ||||
| JP9177806A | ||||
| JP1054026A | ||||
| JP10317422A | ||||
| JP583035U | ||||
| JP58176193U |
Attorney, Agent or Firm:
Kazuhiko Kido
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