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Thread tensioner for a sewing machine

A sewing machine and thread tightening technology, which is applied in the direction of sewing machine control devices, sewing machine hooks, sewing machine components, etc., can solve problems such as complex structures, and achieve the effect of simple control

Inactive Publication Date: 2005-03-30
DURKOPP ADLER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this thread tensioning device is that it must be supplied with compressed air for operation, which is not available in every sewing factory
And, the structure of this tightening device is complicated

Method used

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  • Thread tensioner for a sewing machine
  • Thread tensioner for a sewing machine
  • Thread tensioner for a sewing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The sewing machine shown in the figures generally comprises a base plate 1 in the form of a housing, a top arm 2 and a column 3 connecting them, which is C-shaped. An arm shaft 4 is housed in the top arm 2, actuating the needle bar 5 with the needle 6 by means of a crank mechanism. Actuation of the arm shaft 4 is performed by a drive motor (not shown). A hook cooperating with the needle 6 is housed in the base plate 1 , the actuation of which is carried out by the arm shaft 4 .

[0017] A thread take-up device 9 for feeding needle thread 10 from a needle thread supply device (not shown) is mounted on the side wall 8 corresponding to the operator's side 7 of the sewing machine. The needle thread 10 is guided through the device 9 into a conventional thread take-up lever 11 and from there to the needle 6 .

[0018] The thread tightening device 9 comprises a support plate 12 supported at a certain distance on the side wall 8 and fixed thereon by screws 14 . A pretensione...

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PUM

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Abstract

The thread tensioner (9) for a sewing machine has a supporting plate (12) equipped with a first thread tensioning device (18) and a second thread tensioning device (17) on the supporting plate, and the tension load to the thread (10) is overcome. For the purpose, a release lever (31) is connected with the supporting plate (12), and works to abut on a release pin (30) of the thread tensioning devices (17, 18). The thread tensioner works in a manner that the release lever (31) abuts on the first thread tightening device (18) first and then the second thread tensioning device (17) with the progress of the pivotably moving processes by separate releasing steps by using a solenoid (36).

Description

technical field [0001] The invention relates to a thread tightening device for a sewing machine. Background technique [0002] In some sewing jobs it may occur that alternately higher or lower tensions will be required to make seams on the same material / seams. This takes place, for example, when sewing a bead which is formed by a cross seam or an additional strip inserted into the sewing material. In this type of sewing work, changing the thread tension from one pre-set, repeatable value to another must be as quick and time-consuming as possible. [0003] DE 19753107C2 describes a sewing machine thread tensioner, in which several thread tensioners can be controlled by pneumatic drives to produce different degrees of thread tension in the individual needle threads. The disadvantage of this thread tensioning device is that compressed air must be supplied for operation, which is not available in every sewing factory. Moreover, the structure of this thread tightening device i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B47/04D05B47/00D05B53/00D05B69/00D05B69/02
CPCD05B47/00D05B69/00D05B69/02D05B53/00
Inventor P·维比哈尔E·多考皮尔
Owner DURKOPP ADLER AG
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