Fine-tuning and touching self-adjusting punching structure of sewing machine for joining seams

Abstract

The invention provides a fine-tuning and touching self-adjusting punching structure of a sewing machine for joining seams. The sewing machine for joining seams at least comprises a seam sewing platform, a fixed-connection seat extending over the seam sewing platform and an automatic cutting-off device fixedly arranged on the fixed-connection seat, wherein the tail end of the seam sewing platform is provided a positioning corresponding blade; the automatic cutting-off device comprises a power driver having an action rod under the same and a fine-tuning and touching self-adjusting punching structure fixedly connected to the tail end of the action rod and driven thereby; the fine-tuning and touching self-adjusting punching structure consists of a tuning seat body; the tuning seat body is formed by a displacement guide groove, a blade seat capable of moving and spaced by the displacement guide groove, a hand-operating connection rod connected with the blade seat and capable of adjusting the blade seat to a proper position relative to the tuning seat body and an elastic jacking member enabling the blade seat to reset after displacement; and the blade seat is fixedly provided with a punching blade corresponding to the positioning corresponding blade. Work efficiency can be improved and defective product incidence rate can be reduced by the use of the fine-tuning and touching self-adjusting punching structure of the sewing machine for joining seams.

Description

technical field [0001] The invention relates to an automatic cutting device of a sewing machine for parallel sewing, in particular to a fine-tuning and touch self-adjusting punching structure of the sewing machine for parallel sewing. Background technique [0002] The so-called sewing machine for side-by-side sewing is a sewing machine that can combine the edges of two pieces of cloth and then sew them together. It is also often called "four-needle six-thread parallel sewing machine" or "four-needle six-thread sewing machine"; moreover, since the sewing machine for parallel sewing has been widely used in factories, its overall structure and general operating principle , I won’t go into details here; because, when two pieces of cloth are sewn together on the net of multiple knitting knits, the net will still be connected with the knitting needles with thread tails that must be disconnected. However, with the continuous development and progress of sewing machines, there are a...

AI Technical Summary

Problems solved by technology

[0004] 1. First of all, whether the position of the knife (punching knife) under the automatic cutting device of the prior art can accurately correspond to the position of the knife (positioning corresponding knife) fixed at the end of the sewing platform will seriously affect the position of the knife. Whether the punching knife and the knife corresponding to the positioning can cut off the end of the thread strongly, completely and quickly; generally speaking, before leaving the factory, the industry will adjust the punching knife and the corresponding knife below the positioning Corresponding to the appropriate position that is most conducive to cutting the weaving thread, otherwise it will not be able to play the function of cutting the tail of the thread; however, before the prior art leaves the factory, it must take a long time to use personal adjustment experience to target the punching knife The relative position of the knife corresponding to this positioning is adjusted, and it can be adjusted to a more appropriate position after countless trials and trial cuttings. Therefore, the existing technology cannot effectively improve the operation speed and accuracy of its adjustment. , not in line with work efficiency

[0005] 2. In addition, when the punching knife and the corresponding positioning knife are worn out due to the use of friction cutting for a long time, the punching knife will deviate from the corresponding positioning knife below, although in this situation The resulting deviation is usually not too large, but it does cause a serious problem that the thread tail cannot be completely cut off; Adjusted, it does not meet the needs of the market

[0006] 3. However, the occurrence of the above-mentioned deviation problem inevitably extends to the corresponding problem of excessive manual adjustment; When the punching knife is manually adjusted, the position of the punching knife may exceed the cutting position of the corresponding knife in the positioning, which may cause damage to the punching knife hitting the corresponding knife in the positioning during the test run and trial cutting. However, severe cases are more likely to cause injury to the user; how to develop and design a related structure for cutting off the end of the line that is more time-saving, faster, and safer to use is actually the responsibility of the artisan. top priority

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