Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FORMATION OF STANCHION FIXING HOLE
Document Type and Number:
Japanese Patent JP3163578
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To form a stanchion fixing hole having a high-strength inner peripheral wall at good work efficiency by pressing a small-diameter pile into the ground, extracting it to form a guide hole, pressing another large-diameter pile into the guide hole, and extracting it.
SOLUTION: A pile 9 sharpened on one end side in the axial direction is pressed into the ground from its tip section 9a, then it is extracted to form a guide hole 20. Another pile 19 having the diameter larger than the diameter of the pile 9 at least at one portion is pressed into the guide hole 20, then it is extracted to form a stanchion fixing hole 21 on the ground. The work efficiency is rather improved as compared with the case that the large-diameter pile 21 is pressed in and extracted just once to form a stanchion fixing hole with the same diameter. When the stanchion fixing hole 21 with the relatively large inner diameter is formed, the work efficiency is not reduced, and the stanchion fixing hole 21 having a smooth and high-strength inner peripheral wall can be obtained.


Inventors:
Shinichi Okada
Application Number:
JP21623697A
Publication Date:
May 08, 2001
Filing Date:
August 11, 1997
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Okada Co., Ltd.
International Classes:
E02D27/42; (IPC1-7): E02D27/42
Domestic Patent References:
JP59179910A
Attorney, Agent or Firm:
Iwao Sugimoto (1 person outside)