DEVIATION PREVENTING STRUCTURE FOR WEDGE - SUMITOMO SEI STEEL WIRE CORP

Title:

DEVIATION PREVENTING STRUCTURE FOR WEDGE

Document Type and Number:

WIPO Patent Application WO/2004/094744

Kind Code:

A1

Abstract:

A deviation preventing structure for a wedge (10) capable of preventing an additional stress on a PC steel material from being deviated by disposing split pieces (11) on the outer periphery of the PC steel material uniformly in the longitudinal direction and spatially equally in the circumferential direction and formed in a conical shape by combining the split pieces (11) of n (n > 1) in quantity to hold the PC steel material, comprising connection means (50, 20) limiting the deviation of the split pieces (11) in the longitudinal direction and allowing the movement thereof in the circumferential direction to connect, to each other, the side faces of the adjacent split pieces (11) of at least n-1 in quantity. When the PC steel material is tensed, the additional stress is allowed to act uniformly on the PC steel material by holdingly disposing the split pieces (11) uniformly in the longitudinal direction.

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Inventors:

KADOTANI TSUTOMU (JP)
TAKAGAKI TAKASHI (JP)
YAMADA MASATO (JP)
MATSUBARA YOSHIYUKI (JP)
NISHINO MOTONOBU (JP)

Application Number:

PCT/JP2004/003453

Publication Date:

November 04, 2004

Filing Date:

March 15, 2004

Export Citation:

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Assignee:

SUMITOMO SEI STEEL WIRE CORP (JP)
KADOTANI TSUTOMU (JP)
TAKAGAKI TAKASHI (JP)
YAMADA MASATO (JP)
MATSUBARA YOSHIYUKI (JP)
NISHINO MOTONOBU (JP)

International Classes:

E04C5/12; (IPC1-7): E04C5/12

Foreign References:

JPS61161323U	1986-10-06
JPS6433344A	1989-02-03
JPH06117054A	1994-04-26
EP0108558A2	1984-05-16
US3999418A	1976-12-28
JPH084208A	1996-01-09

Other References: