Face thread holder for sewing machine

A technology of holding device and sewing machine, applied in sewing machine measuring device, thread cutting mechanism in sewing machine, sewing machine components, etc., can solve the problems of uneven length of upper thread, sticking to machine shuttle, length of thread head, etc. Stabilization, prevention of slack in the upper thread, and short length effect

Active Publication Date: 2004-06-09
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But, with regard to the situation of above-mentioned patent document 1, the clamping of upper thread is carried out when machine needle passed the machine needle passing hole of throat plate, and at this point of time, pull-up of upper thread with thread take-up lever has not yet finished, There may be a problem that the length of the thread remaining on the needle point becomes longer
[0009] In addition, in the case of the above-mentioned Patent Document 2, since the holding force of the needle thread holding device to hold the needle thread is changed and adjusted according to the adjustment of the pressure reducing valve, there is a problem that it is difficult to adjust the holding force.
In addition, the clamping of the upper thread is carried out with a

Method used

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  • Face thread holder for sewing machine
  • Face thread holder for sewing machine
  • Face thread holder for sewing machine

Examples

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Embodiment Construction

[0036] Below, refer to Figure 1 to Figure 16 Examples of the present invention will be described.

[0037] In addition, in the description of the structure of each part of the sewing machine body including the needle thread holding device of the present invention, in this embodiment, each direction is determined by the XYZ axes shown in the figure. The Z-axis direction is a direction parallel to the up and down movement of the machine needle, and the X-axis and Y-axis directions are two directions perpendicular to each other on a plane perpendicular to the Z-axis direction. In particular, the + side in the X-axis direction is left and the - side is right; the + side in the Y-axis direction is front and the - side is rear; the + side in the Z-axis direction is up and the - side is down.

[0038] figure 1 The shown sewing machine 100 includes: a bottom plate portion 31 having a substantially horizontal bottom plate surface 31a, a vertical body portion 32 erected at the rear e...

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Abstract

The upper thread holding device (60) for the sewing machine (100) bends the upper thread with a projection part (2c) which is arranged in a pinching member, when the upper thread is held between the holding surface (1f) of a holding member and the pinching surface (2e) of the pinching member. A holding force for holding the upper thread by the upper thread holding device is adjusted in two steps, i.e., a resistance force in bending which is given to the projection part, and a pinching force for pinching the upper thread between the holding surface and the pinching surface. The upper thread is held after adjusting the length of the upper thread on the rear side surface of the fabric.

Description

technical field [0001] The present invention relates to a method for clamping the end of the upper thread passed through the needle under the needle plate at the start of sewing and moving the clamped end of the upper thread to a position separated from the up and down movement path of the needle Upper thread retaining device for sewing machines. Background technique [0002] In the past, it is well known that in order to reliably form the stitches at the beginning of sewing with a sewing machine and stabilize the length of the upper thread left on the needle point at the beginning of sewing, when the needle passes through the needle passage hole (needle hole) of the needle plate and pulls up, the The upper side of the needle plate holds the upper thread holding device that passes the end of the upper thread on the needle of the first stitch at the beginning of sewing and holds the upper thread at a predetermined position (for example, refer to Patent Document 1). [0003] ...

Claims

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Application Information

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IPC IPC(8): D05B45/00D05B65/06
CPCD05B65/06
Inventor 胜俣知裕日塔隆皆川忠义
Owner JUKI CORP
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