Title:
SEWING MACHINE
Document Type and Number:
WIPO Patent Application WO/2012/014610
Kind Code:
A1
Abstract:
Disclosed is needle yarn tension control device that can control the amount of tension in a needle yarn for each stitch, can draw out the needle yarn, provides little risk of yarn breakages, readily and accurately detects any yarn breakages, and has no excess or insufficient amount of accumulated yarn from pulling out the needle yarn. Said needle yarn tension control device comprises an upstream grip (40) that grips the needle yarn, a downstream grip (60), and a rotating section (80) that rotates the needle yarn. In a torque control section, a balance (12a) applies rotational force to a rotating arm in accordance with a torque value such that tension is applied to the needle yarn against the direction that the needle yarn is pulled, while an upstream grip main body (41) is closed and a downstream grip main body (61) is open. In the position control section, the balance applies rotational force to the rotating arm (81) in accordance with position data for the angle of a needle yarn motor (86) such that the needle yarn motor angle returns to an initial position for the needle yarn motor (86) angle, while the upstream side grip main body (41) is open and the downstream side grip main body (61) is closed.
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Inventors:
TAKIZAWA, Yoshichika (3-31-28 Osu, Naka-ku, Nagoya-sh, Aichi 02, 〒4608302, JP)
滝沢義知 (〒02 愛知県名古屋市中区大須３丁目３１番２８号 エヌエスディ株式会社内 Aichi, 〒4608302, JP)
KURASHIMA, Tatsuhiro (3-31-28 Osu, Naka-ku, Nagoya-sh, Aichi 02, 〒4608302, JP)
滝沢義知 (〒02 愛知県名古屋市中区大須３丁目３１番２８号 エヌエスディ株式会社内 Aichi, 〒4608302, JP)
KURASHIMA, Tatsuhiro (3-31-28 Osu, Naka-ku, Nagoya-sh, Aichi 02, 〒4608302, JP)
Application Number:
JP2011/064464
Publication Date:
February 02, 2012
Filing Date:
June 23, 2011
Export Citation:
Assignee:
NSD CORPORATION (3-31-28, Osu Naka-ku, Nagoya-sh, Aichi 02, 〒4608302, JP)
エヌエスディ株式会社 (〒02 愛知県名古屋市中区大須３丁目３１番２８号 Aichi, 〒4608302, JP)
TAKIZAWA, Yoshichika (3-31-28 Osu, Naka-ku, Nagoya-sh, Aichi 02, 〒4608302, JP)
滝沢義知 (〒02 愛知県名古屋市中区大須３丁目３１番２８号 エヌエスディ株式会社内 Aichi, 〒4608302, JP)
エヌエスディ株式会社 (〒02 愛知県名古屋市中区大須３丁目３１番２８号 Aichi, 〒4608302, JP)
TAKIZAWA, Yoshichika (3-31-28 Osu, Naka-ku, Nagoya-sh, Aichi 02, 〒4608302, JP)
滝沢義知 (〒02 愛知県名古屋市中区大須３丁目３１番２８号 エヌエスディ株式会社内 Aichi, 〒4608302, JP)
International Classes:
D05B47/04; D05B45/00
Attorney, Agent or Firm:
NAGAYA, Naoki (Room No.302, Marunouchi Office Forum 2-1-30, Marunouchi, Naka-ku, Nagoya-sh, Aichi 02, 〒4600002, JP)
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