SPIRAL BODY AND MANUFACTURING METHOD THEREOF

PROBLEM TO BE SOLVED: To easily and inexpensively provide a spiral body having sufficient underground bearing power, when formed as a pile with high rigidity.SOLUTION: Combinational shape steel of a rotational symmetrical cross section is constituted by combining a plurality of shape steels of the s...

Full description

Saved in:
Bibliographic Details
Main Authors KATAYAMA MICHIYUKI, NOMA TETSUO, WAKUDA TAKAO
Format Patent
LanguageEnglish
Published 06.02.2014
Subjects
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
TRANSPORTING
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To easily and inexpensively provide a spiral body having sufficient underground bearing power, when formed as a pile with high rigidity.SOLUTION: Combinational shape steel of a rotational symmetrical cross section is constituted by combining a plurality of shape steels of the same cross-sectional shape back-to-back. This combinational shape steel is twistingly processed, and is formed as, for example, a spiral body P1 of a cross-shaped cross section. When manufacturing the spiral body P1, one end part of the combinational shape steel P2 is supported by a fixed side chuck 13 in a rotation-restricted state. The other end part of the combinational shape steel P2 is connected to a motor 15 as rotational driving means via a rotary side chuck 14. A twist is imparted to the combinational shape steel P2 by the motor 15, and in a state of maintaining tension in the axial direction generated in the combinational shape steel P2 by impartment of the twist in a predetermined size, the fixed side chuck 13 and the rotary side chuck 14 are mutually gradually approached.
Bibliography:Application Number: JP20120163738