Stitch opening preventing device

A suture and needle thread technology, applied in the field of suture unraveling prevention device, to achieve the effect of shortening the end of the thread and eliminating the need for cutting

Inactive Publication Date: 2014-02-12
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a certain limit on the shortening of the thread end, and depending on the situation, additional thread cutting processing is required.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] Hereinafter, embodiments of the present invention will be described in detail using the drawings.

[0052] figure 1 It is a figure which schematically shows the main part structure of the sewing machine provided with the thread fray preventing device which concerns on one embodiment of this invention.

[0053] figure 1 The sewing machine 1 has a sewing machine frame including a machine base portion 1A. This sewing machine frame has a structure in which an upright body portion (not shown) is erected on the base portion 1A, and an arm portion (not shown) extends horizontally from the upper portion of the upright body portion.

[0054] Here, in the following description, the direction along the feeding direction (arrow A) is defined as the X-axis direction (front-rear direction), and the longitudinal direction of the arm portion perpendicular to the X-axis direction is defined as the Y-axis direction (left-right direction). , and the direction perpendicular to both the ...

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PUM

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Abstract

Disclosed is a stitch opening preventing device which is capable of shortening thread ends so as to avoid cutting off of the thread ends. The stitch opening preventing device comprises a hook piece, a first cutter and a second cutter; the hook piece hooks a part of a looper thread connected to a looper from fabric when a terminal is finished and the looper is at an advancing position; the first cutter and the second cutter cut off threads and the looper thread. By the stitch opening preventing device, when the looper thread is hooked by the hook piece and after needles and the looper are driven by a stitch, parts of the threads, namely thread loops, connected to the needle from the fabric via the looper and the part of the looper thread connected to the looper from the fabric are cut off between the fabric and the lopper through the second cutter; the first cutter cuts off a thread loop, between the fabric and the hook piece, of the looper thread hooked between the fabric and the hook piece through advancing.

Description

technical field [0001] The present invention relates to a thread fray preventing device for preventing seam fraying at a sewing end in a multi-needle double circular stitch sewing machine for forming a double circular seam. Background technique [0002] As a device for preventing the double circular seam formed on the fabric from opening, for example, the device disclosed in Patent Document 1 is known. [0003] The thread fray prevention device disclosed in this document is arranged in a sewing machine that forms a double circular seam by cooperation of a plurality of needles and a looper. In this sewing machine, the needle is at the top dead center at the end of sewing, and the looper thread from the material to the eyelet of the looper is hooked by the hook on the left side of the left needle in a state where the looper enters the leftmost. Then, in this state, the needle and the looper are driven by one stitch. Subsequently, the hook cutter is moved back and forth, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B61/00D05B65/02
Inventor 河本修
Owner JUKI CORP
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