Title:
EXCAVATING METHOD
Document Type and Number:
Japanese Patent JP2715275
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To effectively solidify a hole wall during an excavation, use a small and low-center of gravity type device as a driving machine rotatively driving a drilling rod, carry in and install the device even at a narrow place for stable work, and simply and surely conduct the excavation without impairing the vertical movement of the drilling rod.
SOLUTION: A vertical groove 10 is formed at the center of the trowel section 5 of a drilling rod 3 having a curved pressing face 6 on the side face and arranged with the trowel section 5 on the outer periphery. A clutch plate 18 made of a vertical plate protrudable with one side end is arranged on the inner periphery of the short cylinder 1 of a drive machine having the vertical short cylinder 1 penetrated by the drilling rod 3 and a driving mechanism rotatively driving the short cylinder 1. One side end of the clutch plate 18 is inserted into the vertical groove 10 to engage the short cylinder 1 and the drilling rod 3, and the drilling rod 3 is rotatively driven. The drilling rod 3 is moved in the vertical direction against the short cylinder 1 while the engaged state is maintained.
Inventors:
Nakayama Kaname
Kobayashi Makoto
Yasuhisa Kato
Kobayashi Makoto
Yasuhisa Kato
Application Number:
JP21454995A
Publication Date:
February 18, 1998
Filing Date:
August 23, 1995
Export Citation:
Assignee:
Suntech Co., Ltd.
International Classes:
E21B7/00; E21B3/02; E21B4/06; E21B10/44; (IPC1-7): E21B3/02; E21B4/06
Attorney, Agent or Firm:
Kubo Tsukasa