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Bobbin thread holding device for seamer

A holding device and sewing machine technology, applied in the sewing machine to cut off the thread mechanism, sewing machine components, sewing machine collar mechanism, etc., can solve the problems of thread tension reduction, not being able to form knots well, pull out, etc., to achieve sewing quality Improve and realize the sewing quality and reduce the effect of pulling out

Active Publication Date: 2007-01-31
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the bobbin thread holding portion of the thread guide plate of the above-mentioned rotary hook mechanism is formed at a position away from the bobbin thread withdrawal position of the shuttle case, and there is a problem in that the bobbin thread is conveyed to the bobbin thread holding portion by the movement of the movable cutter. Extraneously drawn out from the shuttle
[0009] As a result, in the next sewing, the thread tension is lowered and the knot cannot be formed satisfactorily.

Method used

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  • Bobbin thread holding device for seamer
  • Bobbin thread holding device for seamer
  • Bobbin thread holding device for seamer

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Experimental program
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Embodiment Construction

[0026] (Overall structure of the embodiment of the invention)

[0027] Based on Figure 1~ Figure 5 The rotary hook mechanism 50 which is an embodiment of the present invention will be described. FIG. 1 is a perspective view showing main parts of a sewing machine 10 equipped with a rotary hook mechanism 50 .

[0028] Hereinafter, let the direction parallel to the upper surface of the needle plate 11 described later and parallel to the hook shaft of the sewing machine 10 not shown be the Y-axis direction, and let the direction parallel to the upper surface of the needle plate 11 and be perpendicular to the Y-axis direction be As the X-axis direction, the direction perpendicular to the upper surface of the needle plate 11 is used as the Z-axis direction, and each part of the sewing machine will be described.

[0029] The sewing machine 10 has a frame 20 formed approximately in the shape of a "U" as a whole, and the frame 20 has: a bottom plate portion 21 located at the bottom ...

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PUM

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Abstract

The invention satisfactorily carrys out nex sewing after cutting off a looper. A shuttle mechanism 50 for a sewing machine is provided with: a bobbin case 51 for housing a bobbin 56 of a looper D; an inner shuttle 52 which is turned reciprocatively around the bobbin case; a large shuttle 54 which holds the inner shuttle inside in a reciprocatively rotatable state; and a thread guide plate 60 arranged at the upper part of the large shuttle. The shuttle mechanism 50 is arranged under a thread cutting device within a sewing machine head part 21. The thread guide plate is provided with a bobbin thread holding part 67 for catching the bobbin thread cleared away by a moving knife 14 of a thread cutting device, and the bobbin thread holding part is positioned in the vicinity of the bobbin thread guide-out part of the bobbin case compared with a bobbin thread pass-through position P in the case of sewing to the thread guide plate.

Description

technical field [0001] The present invention relates to a bobbin thread holding device of a sewing machine which holds the trimmed bobbin thread end under a needle plate. Background technique [0002] In the past, there is known a sewing machine equipped with a rotary hook device. The rotary hook device is composed of: a shuttle case for accommodating a shuttle of the lower thread; The rotary hook embraces the large rotary hook that surrounds the inside. It is known that in this sewing machine, a thread cutting device is provided on the lower side of the needle plate of the sewing machine bottom plate and above the hook device, and a thread guide plate (for example, , refer to Patent Document 1). A guide hole and a bobbin thread holding portion for holding the end of the bobbin thread cut by the thread trimmer are formed on the thread guide plate. [0003] In the structure having the above-mentioned guide plate, when the needle is lowered to the inner side of the guide ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B57/00
CPCD05B37/08D05B57/26D05B57/38D05B63/02D05B65/06D05D2305/36
Inventor 三须伸介
Owner JUKI CORP
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