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sewing machine

A sewing machine and sewing needle technology, which is applied to sewing machine components, sewing machine needle seats, sewing equipment, etc., can solve the problems of reduced sewing quality, achieve the effect of improving sewing quality, avoiding extension, and shortening the remaining end

Active Publication Date: 2019-10-11
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if Figure 13 As shown in (B), excess ends are produced from the two separated parts, resulting in a decrease in sewing quality.

Method used

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  • sewing machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0092] 〔Overall structure of a lockstitch sewing machine〕

[0093] Below, based on Figure 1 to Figure 15 , the embodiments of the present invention will be described in detail. figure 1 is a schematic configuration diagram of the sewing machine 10 according to the present embodiment, figure 2 is the block diagram of the control system.

[0094] The sewing machine 10 is a so-called lockstitch sewing machine, and has: a sewing machine frame 20; a needle up and down movement mechanism 30, which moves up and down the needle bar 12 holding the sewing needle 11; Needle position; kettle mechanism 50, which winds the upper thread U and lower thread D of sewing needle 11 on the lower side of needle plate 40; Conveying at a fixed feed pitch; the feed adjustment mechanism 70, which changes the feed pitch; the thread cutting device 80, which cuts off the upper thread U and the lower thread D after the final needle drop; the thread take-up mechanism 90, which The needle-side part U1...

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PUM

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Abstract

A sewing machine (10) comprises a throat plate (40, 40A) formed with a needle hole (411, 421, 431A) through which a sewing needle (11) passes, a moving mechanism (60) configured to move a workpiece along an upper surface of the throat plate (40, 40A), a needle up-down moving mechanism (30) configured to move the sewing needle (11), a shuttle mechanism (50) configured to capture an upper thread (U) from the sewing needle (11) below the throat plate (40, 40A) and to interlace the upper thread (U) with a lower thread (D); a thread cutting device (80, 80A) provided between the throat plate (40, 40A) and the shuttle mechanism (50) to cut the upper and lower threads (U, D), a wiper mechanism (90) configured to pull out, upwardly from the workpiece, a sewing needle side portion of the upper thread (U) that has been cut by the thread cutting device (80, 80A), a control device (120), a remaining end cutoff mechanism (100, 100A) disposed below the upper surface of the throat plate (40, 40A) and above the thread cutting device (80, 80A). The remaining end cutoff mechanism (100, 100A) is configured to cut off, after the lower thread (D) and the upper thread (U) are cut by the thread cutting device (80, 80A), remaining end portions of the lower thread (D) and the upper thread (U) connected to the workpiece.

Description

technical field [0001] The present invention relates to a sewing machine provided with a thread cutting device for cutting the upper thread and the lower thread. Background technique [0002] In the sewing machine that knots the upper thread and the lower thread to form stitches through the coordinated action of the needle up and down movement mechanism and the kettle mechanism, there is a thread cutting device that is used to separate the lower thread and the upper thread on the lower side of the needle plate. After separating the fabric side part of the upper thread and the needle side part of the upper thread, cut the specified thread. And, as such a thread cutting device, a rotary type in which the cutter moves around the kettle and a horizontal type in which the cutter moves along a horizontal plane are often used. [0003] The above rotary thread cutting device has a fixed thread cutting knife and a movable thread cutting knife which are rotatably supported around the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B65/06D05B55/14
Inventor 加藤修平公文哲
Owner JUKI CORP