| 摘要 |
A belt loop slackening apparatus 1 includes: a moving member 11 disposed laterally of a main body of a sewing machine and movable reciprocatingly along a transporting direction of a member to be sewn in a sewing operation of the sewing machine; a drive cylinder 20 supported on the moving member such that the drive cylinder can be expanded and contacted; a slackening member 18 having one end supported on the drive cylinder, and the other end being movable forward and backward internally of the member to be sewn; a loop slackening motor 6 connected to the moving member and capable of moving the slackening member along the transporting direction; input set means 35 for inputting a set value of a slackening amount of the member to be sewn; and drive control means 36 for controlling the loop slackening motor in such a manner that, when sewing the member to be sewn to a body cloth, in order to slacken the member to be sewn by a given amount, the slackening member can be moved to a folded position of the slackening member according to the set value.
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