JPH01168275U

JPH01168275U -

Info

Publication number: JPH01168275U
Application number: JP1209489U
Authority: JP
Priority date: 1989-02-03
Filing date: 1989-02-03
Publication date: 1989-11-27
Also published as: JPH0425113Y2

Description

[Brief explanation of the drawing]

第１図は要部の正面図、第２図は電気回路のブ
ロツク図、第３図は設定装置の詳細を示したブロ
ツク図、第４図はタイムチヤート、第５図〜第８
図は他の実施例で、第５，８図は第１図に対応す
る斜視図、第６図は第２図に対応するブロツク図
、第７図は第３図に対応するタイムチヤートであ
る。１……ミシン、１３……ステツピングモータ（
駆動装置）、１４，１７……ローラ（繰り出し体
）、３６……設定装置、１０ａ……変更装置。 Figure 1 is a front view of the main parts, Figure 2 is a block diagram of the electric circuit, Figure 3 is a block diagram showing details of the setting device, Figure 4 is a time chart, and Figures 5 to 8.
The figures show other embodiments. Figures 5 and 8 are perspective views corresponding to Figure 1, Figure 6 is a block diagram corresponding to Figure 2, and Figure 7 is a time chart corresponding to Figure 3. . 1... Sewing machine, 13... Stepping motor (
(drive device), 14, 17... roller (feeding body), 36... setting device, 10a... changing device.

Claims

[Scope of Claim for Utility Model Registration] 1. A device that operates in conjunction with a thread amount signal output from a setting device, and feeds out needle thread of a length corresponding to the thread amount signal from a bobbin winder each time a stitch is formed, and the needle, hook, A feeding device that feeds the stitch forming device consisting of a thread take-up; and a feeding device that operates in response to a thread trimming signal to feed out a constant amount of needle thread between the needle and the workpiece from a supply source below the workpiece and cut it. In a thread trimming sewing machine equipped with a thread trimming device, the setting device includes a first signal generating unit that generates a thread amount signal corresponding to the thread amount required to form one stitch of a sewing pattern, and a thread trimming device that operates the thread trimming device. a second signal generating means that generates a thread amount signal corresponding to the amount of needle thread to be paid out from the supply source in accordance with the amount of needle thread to be paid out from the supply source; and a second signal generating means that always outputs the thread amount signal from the first signal generating means, and A needle thread supply device for a thread trimming sewing machine, comprising a signal switching means for outputting a thread amount signal from a second signal generating means in place of a thread amount signal from the first signal generating means. 2. The needle thread supply device for a thread trimming sewing machine as described in the preceding item, wherein the setting device has a changing means that allows manual operation to change the thread amount signal output from the second signal generating means.