Title:
END SCREW PROCESSING METHOD FOR REINFORCING BAR AND END STRUCTURE OF REINFORCING BAR
Document Type and Number:
Japanese Patent JP2016175092
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an end screw processing method for a reinforcing bar which enables a reinforcing bar anchored in a reinforcing-bar concrete structure to surely be broken in the base metal without requiring large-scaled equipment.SOLUTION: The tip part of a reinforcing bar 10 is processed by cutting in a taper form to form a taper part 11. A taper screw part 12 is formed by rolling in the outer periphery of the taper part 11. The taper angle of the taper part 11 set to 5.5° to 6.5°. The taper screw part 12 is formed by rolling along the taper angle. Reinforcing bars 10 are sandwiched among three roller dies 20. The taper screw part 12 is formed by rolling the roller die 20 in the outer periphery of the taper part 11.SELECTED DRAWING: Figure 1
Inventors:
AKIYAMA TAKAHIRO
OTSU NAOHIKO
YAMAZAKI KATSUJI
OTSU NAOHIKO
YAMAZAKI KATSUJI
Application Number:
JP2015055503A
Publication Date:
October 06, 2016
Filing Date:
March 19, 2015
Export Citation:
Assignee:
AKITEC:KK
OTSU TEKKO KK
UNYTITE CO LTD
OTSU TEKKO KK
UNYTITE CO LTD
International Classes:
B21H3/04; B21H3/12; B23P13/00; E04C5/03; E04C5/12; F16B33/02
Domestic Patent References:
| JPH11342448A | 1999-12-14 | |||
| JPS4623310Y1 | 1971-08-11 | |||
| JPS6427138U | 1989-02-16 | |||
| JPH11342448A | 1999-12-14 | |||
| JPS4623310Y1 | 1971-08-11 | |||
| JPS6427138U | 1989-02-16 | |||
| JPS59113948A | 1984-06-30 | |||
| JPH0657883A | 1994-03-01 | |||
| JPH04128104U | 1992-11-24 |
Attorney, Agent or Firm:
Hiroshi Harada
Masami Nakamura
Masami Nakamura