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sewing machine

A sewing machine and sewing needle technology, which is applied to sewing machine components, sewing equipment, sewing machine control devices, etc., can solve problems such as narrowing of the working area, and achieve the effect of improving workability and realizing workability

Active Publication Date: 2017-07-14
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, exactly the same as the above-mentioned sewing machine that sews based on the set number of stitches, there is a problem that the working area for threading is narrowed.

Method used

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Examples

Experimental program
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Embodiment Construction

[0056] [Sewing Machine Overview]

[0057] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. figure 1 It is a perspective view showing the overall structure of the sewing machine 10 of this embodiment. In addition, in the following description, the direction horizontal and parallel to the longitudinal direction of the sewing machine arm portion 2a described later is referred to as the Y-axis direction (front-rear direction), and the direction horizontal and perpendicular to the Y-axis direction is referred to as the X-axis direction. Let the vertical up-down direction be the Z-axis direction (up-down direction).

[0058] Such as figure 1 As shown, the sewing machine 10 is a so-called lockstitch sewing machine, which mainly has: a sewing machine frame 2, which supports the overall structure; A device (not shown) that cuts the upper thread; and a control unit 100 as a control unit that controls the operation of various parts o...

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Abstract

The present invention provides a sewing machine which improves the workability of threading work after a thread break occurs. The sewing machine has: a sewing needle up and down movement mechanism, which moves up and down the needle bar (12) holding the sewing needle from the sewing machine motor (5) via the upper shaft (22); a thread cutting device, which cuts the upper thread; a storage unit (103), It stores the specified number of stitches corresponding to one process of sewing; the number of stitches detection part (31, 32), which detects the number of stitches from the start of sewing; an instruction for thread cutting; and a control unit (100) that controls the operation of the thread cutting device and the motor of the sewing machine, and that performs the operation control of the needles from the start of sewing in one process detected by the needle number detection unit. Before the state where the number of stitches matches the predetermined number of stitches, when an execution instruction of thread trimming is input through the operation part, the sewing machine motor is stopped at the top dead center position of the needle bar.

Description

technical field [0001] The present invention relates to a sewing machine that appropriately performs threading work after a thread break occurs. Background technique [0002] As a conventional sewing machine, there is known a sewing machine in which the number of sewing stitches is set in advance, and after the sewing of the set number of stitches is performed, the thread is automatically trimmed to complete sewing (for example, refer to Patent Document 1). [0003] In addition, generally in a sewing machine, when the upper thread breaks unexpectedly during sewing, the upper thread may be pulled back from the feeding direction due to thread tension, and the upper thread may be pulled out from the needle hole of the sewing needle. In the case of restarting sewing from the stitch where the thread breakage occurred, the upper thread must be reinserted into the needle hole of the sewing needle again. [0004] Therefore, in the above-mentioned conventional sewing machine, when a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B69/24
Inventor 洼田义彦
Owner JUKI CORP
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