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Title:
ANCHOR BOLT AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2009166111
Kind Code:
A
Abstract:

To improve productivity by making the male-screw of a screw-in part by thread-rolling, and to secure suitable outer diameter size in a bolt main body and the screw-in part.

In an anchor bolt to be fitted to an existing concrete skeleton as a joint bar, etc., for reinforcing a concrete wall of an increased concrete placement, and its manufacturing method, a straight screw-in part 11c having a smaller diameter than that of the bolt main body 11a, is formed at the tip side of the bolt main body 11a made of a steel reinforcement by drawing via a narrowing taped part 11b, and in this screw-in part 11c, the male-screw to be screwed into the female-screw part 5 of the anchor is thread-rolled to make the anchor port.


Inventors:
HATA SHIGERU
Application Number:
JP2008009534A
Publication Date:
July 30, 2009
Filing Date:
January 18, 2008
Export Citation:
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Assignee:
NIPPON PROJECT KK
International Classes:
B21H3/02; B21H1/00; F16B35/00
Attorney, Agent or Firm:
Etsushi Kotani
Takao Ito
Jiro Higuchi