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Sewing machine

A sewing machine and needle technology, applied in the field of sewing machines, can solve the problems of difficulty in adjusting the tension of the first thread adjusting element, shortening the length, etc., and achieve the effects of preventing thread jumping and easy thread changing.

Inactive Publication Date: 2006-07-12
JUKI CORP
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the contrary, if the tension of the first thread adjustment element becomes too large, when the thread is cut, the amount of the thread drawn from the thread supply source by the thread cutter is reduced, resulting in the length of the thread coming out from the needle hole after the thread is cut. shortening problem
Therefore, it is very difficult to adjust the tension of the first thread adjusting element

Method used

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Examples

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Embodiment Construction

[0033] Next, preferred embodiments of the sewing machine of the present invention will be described in detail with reference to the accompanying drawings.

[0034]

[0035] like Figure 1 to Figure 11 As shown, the sewing machine M has: a sewing machine motor 10 (refer to Figure 11 ) and is arranged on the needle bar 1b that moves up and down by the driving of the sewing machine motor 10, and the thread cutting device 8 that cuts the thread after the sewing of a predetermined cycle is completed (refer to Figure 11 ), and after the thread is cut by the thread cutting device 8, the thread sweeping device 2 that traverses between the needle 1 and the object to be sewn on the needle plate, and draws out the thread from the object to be sewn, and as a pair Insert through the needle hole 1a of the needle 1 (refer to image 3 ) to apply tension to the thread, as a thread tension application mechanism thread adjusting element 3, and when the needle 1 is drawn out from the sewing...

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Abstract

A sewing machine (M) comprising: a needle (1) through which a thread (T) is passed through a needle hole formed at a front end and which sews an object to be sewn placed on a needle plate by moving up and down, And the thread cutting device that cuts the thread (T) after the specified amount of sewing is completed, and the thread (T) is cut across the needle (1) and the object to be sewn after the thread (T) is cut by the thread cutting device. ) a thread wiper (2) drawn out from the object to be sewn, and a tension applying mechanism (3) that applies tension to the thread (T) inserted in the needle hole, and a thread tension control mechanism; wherein; the thread The tension control mechanism controls the action of the thread tension applying mechanism (3), so that when the thread (T) is pulled out from the sewing object by the thread wiper (2), tension is applied to the thread, and the thread (T) ) is pulled out from the object to be sewn to release the tension applied to the thread. In this sewing machine, the length of the thread coming out from the needle hole of the machine needle after the thread is cut can be optimized.

Description

technical field [0001] The present invention relates to a sewing machine. Background technique [0002] Conventionally, a sewing machine is provided with a thread adjusting element that applies tension to the thread, and an appropriate tension can be applied to the stitches by the thread adjusting element. The thread adjustment unit is composed of two tension discs facing each other. By using the elastic force of the thread adjustment spring to press one tension disc on the other tension disc, tension can be applied between the thread adjustment discs. online. [0003] In a sewing machine, two such thread adjusting elements are provided. The first thread adjusting element set close to the thread supply source has nothing to do with the sewing condition of the sewing machine, and always applies tension to the thread; the second thread adjusting element set close to the needle only exerts a much larger tension on the thread during sewing. The tension of the first thread reg...

Claims

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Application Information

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IPC IPC(8): D05B47/04D05B53/00D05B65/06D05B19/12
CPCB23Q5/027B23Q7/006B23Q7/048
Inventor 坂井克秋
Owner JUKI CORP
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