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Chain stitch loosing prevention device

A chain stitch and anti-loosening technology, applied in the field of sewing machines, can solve problems such as affecting the appearance and performance, hanging cloth, complex structure, etc., and achieve the effect of solving the appearance of cumbersome, avoiding the loosening of the stitches, and simplifying the structure.

Inactive Publication Date: 2016-07-27
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution has the disadvantage of a relatively complex structure, and the driver of this solution is a plug-in type, which seriously affects the appearance and performance, such as: there is a risk of hanging cloth when sewing

Method used

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  • Chain stitch loosing prevention device
  • Chain stitch loosing prevention device
  • Chain stitch loosing prevention device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below with specific embodiment, see figure 1 —4:

[0023] A chain stitch anti-loosening device includes a swing rod 1, and the swing rod 1 is installed under a needle board frame 3 through an installation shaft 2. The mounting shaft 2 can be a shaft screw or a pin shaft. What this embodiment adopts is the axial screw. One end of the swing rod 1 is provided with a cutter head 4, and the other end is connected with the drive source 5. Under the action of the drive source 5, the swing rod 1 can swing around the installation shaft 2 and then drive the cutter head 4 away from the looper 6 or toward the top of the looper 6. Movement, the action of the drive source 5 is controlled by the electric control box.

[0024] The cutter head 4 is installed on the cutter head mounting seat 7 , and the cutter head mounting seat 7 is arranged on one end of the swing rod 1 .

[0025] Since the swing rod 1 is located below the needle plat...

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PUM

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Abstract

The invention belongs to the technical field of sewing machines and particularly relates to a chain stitch loosing prevention device. The chain stitch loosing prevention device comprises a swing rod which is mounted below a needle plate frame through a mounting shaft, and one end of the swing rod is provided with a tool bit while the other end of the swing rod is connected with a driving source. Under the action of the driving source, the swing rod is capable of swinging around the mounting shaft to drive the tool bit to move away from a curved needle or move towards a direction above the curved needle. Motions of the driving source are controlled by an electric cabinet. On the basis of existing lock stitch techniques, the structure is further simplified and optimized by that a stitch breaking direction of a bobbin thread is changed by a simple hook cutting structure in a limited space under a needle plate, and accordingly stitch loosing is avoided, and stitch locking is realized.

Description

Technical field: [0001] The invention belongs to the technical field of sewing machines, in particular to a chain stitch anti-loosening device. Background technique: [0002] Interlock seams are chain stitch. After the thread is cut, the bobbin thread can also be drawn out, causing damage to the stitches. There are relevant solutions at present by changing the cutting direction of the original bottom thread, so as to prevent the bottom thread from being pulled out and loosened. However, this solution has the defect that the structure is more complicated, and the drive of this solution is a plug-in type, which seriously affects the appearance and performance, such as: there is a risk of hanging cloth when sewing. Invention content: [0003] The object of the present invention is to provide a chain stitch anti-loosening device which uses a simple hooking structure to change the thread breaking direction of the bottom thread so as to avoid stitch loosening. [0004] The pr...

Claims

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Application Information

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IPC IPC(8): D05B65/00
CPCD05B65/00
Inventor 邱丽
Owner JACK SEWING MASCH CO LTD
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