Patent ID: 8909366
Filing Date: 2014-12-09
Classification: D05C

Abstract:
1. A sewing machine, comprising: a plurality of needle bars a lower end of each of which a needle can be attached to, the needle having a needle eye through which can be passed an upper thread that is supplied from a thread spool; a display portion that is configured to display various information; a plurality of tensioners that correspond to the plurality of needle bars, each of the plurality of tensioners having a rotating plate that is configured to impart tension to the upper thread; a threading mechanism that is configured to pass an upper thread through a needle eye of a needle that is attached to a needle bar that has been selected from among the plurality of needle bars; an operation portion that is configured to input an instruction to operate the threading mechanism; a first display control portion that is configured to cause the display portion to display replacement information, the replacement information being information pertaining to a replacement needle bar that corresponds to a thread spool for which replacement is necessary and that is at least one of the plurality of needle bars; a specifying portion that is configured to specify a replacement-completed needle bar, during a period in which the replacement information is being displayed on the display portion, by: (i) detecting that a rotating plate has been rotated in a specified direction by an upper thread that is supplied from a thread spool that has been placed after replacement, and (ii) determining that the operation portion has been operated, the specified direction being a direction in which the rotating plate is rotated in a case where the upper thread is pulled toward the needle from the thread spool, the replacement-completed needle bar being a needle bar: (i) that corresponds to the thread spool that has been placed after replacement, (ii) that corresponds to a tensioner that has the rotating plate that has been rotated in the specified direction, and (iii) to which is attached the needle that has the needle eye through which the upper thread has been passed by the threading mechanism in a case where the operation portion has been operated; and a second display control portion that is configured to cause the display portion to display a result that has been specified by the specifying portion.