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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2017/110328
Kind Code:
Provided is a sewing machine with which a user can easily guide a needle thread. The sewing machine is provided with a thread tension mechanism for tensioning a needle thread, a thread feed sensor for detecting the movement of the needle thread, a sewing section for executing sewing by causing up and down movement of a sewing needle, and a control unit. When the fact that movement of the needle thread has been detected by the thread feed sensor is assumed as a criterion (S43: YES, S45: NO) in a first state for which a first tension acts on the needle thread via the thread tension mechanism in a stopped state where sewing by the sewing unit has stopped, the control unit sets the thread tension mechanism to a second state (S49), whereby the tension acting on the needle thread is set to a second tension that is lower than the first tension. In a sewing state where sewing is executed by the sewing unit, the control unit sets the thread tension mechanism to a third state, and thereby sets the tension acting on the needle thread to a third tension that is the same or greater than the second tension.

SUZUKI Yasunori (15-1Naeshiro-cho,Mizuho-ku,Nagoya-sh, Aichi 61, 〒4678561, JP)
HIROSE Hirokazu (15-1Naeshiro-cho,Mizuho-ku,Nagoya-sh, Aichi 61, 〒4678561, JP)
Application Number:
Publication Date:
June 29, 2017
Filing Date:
November 18, 2016
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BROTHER KOGYO KABUSHIKI KAISHA (15-1, Naeshiro-choMizuho-ku,Nagoya-sh, Aichi 61, 〒4678561, JP)
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