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Stitch Outlet Detection Device, Sewing Machine And Stitch Outlet Detection Method

The technology of a detection device and a detection method is applied in the direction of sewing machine components, sewing machine control devices, tension devices, etc., and can solve the problems of uneven sewing and stitch skip detection, etc.

Inactive Publication Date: 2016-11-02
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, skipped stitches cannot be accurately detected due to stretching of the upper thread and uneven sewing only based on the movement amount of the upper thread.

Method used

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  • Stitch Outlet Detection Device, Sewing Machine And Stitch Outlet Detection Method
  • Stitch Outlet Detection Device, Sewing Machine And Stitch Outlet Detection Method
  • Stitch Outlet Detection Device, Sewing Machine And Stitch Outlet Detection Method

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Embodiment Construction

[0041] Hereinafter, a sewing machine equipped with the skipped stitch detection device according to this embodiment will be described with reference to the drawings. figure 1 It is a perspective view of the sewing machine according to this embodiment. Fig. 2 is an explanatory diagram of the sewing operation in a normal state according to the present embodiment. Fig. 3 is an explanatory diagram of the sewing operation when stitch skipping occurs according to this embodiment. In addition, the sewing machine according to this embodiment is only an example, and any configuration may be sufficient as long as it is a sewing machine equipped with a skipped stitch detection device. In addition, in FIG. 2, for convenience of description, the kettle mechanism except for the rotary kettle and the spool housing is omitted.

[0042] Such as figure 1 As shown, the sewing machine 1 according to the present embodiment is an industrial sewing machine such as a circulating sewing machine, and is ...

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Abstract

The invention provides a stitch outlet detecting device of a sewing machine which can detect a stitching with high accuracy and is unaffected by elongation of a thread or sewing unevenness. The stitch outlet detecting device (21) of a sewing machine forms a stitch by detecting a top thread loop formed by a sewing needle by using a rotary kettle and by causing a top thread and a bottom thread to cross each other. The device comprises: a rotary member (33), which rolls the top thread to the center of a thread path extending from a thread reel of the top thread; a motor (29) which causes the rotary member to rotate so as to apply a tension to the top thread upon feeding the top thread from the thread reel; and a detection unit (22) which monitors a predetermined portion immediately before the upper top loop is released from the rotary kettle, and detects the stitch outlet of the behavior of the motor in the predetermined portion.

Description

Technical field [0001] The present invention relates to a skipped stitch detection device, a sewing machine and a skipped stitch detection method for detecting skipped stitches that do not form stitches during sewing. Background technique [0002] Currently, as a skipped stitch detection device of a sewing machine, a skipped stitch detection device that detects skipped stitches based on the amount of movement of the upper thread pulled in along the line is known (for example, refer to Patent Document 1). In this skipped stitch detection device, the upper thread is wound around a roller provided in the middle of the route, and the roller rotates in accordance with the amount of the upper thread drawn along the route. At this time, a sensor installed at the roller is used to detect the amount of movement of the upper thread based on the amount of rotation of the roller. No stitches are formed at the skipped stitches, and the amount of upper thread used is less than that in normal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B69/36D05B69/30
CPCD05B47/04D05B51/00D05B69/36D05B69/30D05D2205/32
Inventor 井村智皆川忠义柳泽理人青山裕司
Owner JUKI CORP
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