Feeding device for circulation sewing machine

Abstract

The invention relates to a feeding device of a circular sewing machine, which comprises a fore-and-aft feeding cam and a left-and-right feeding cam, wherein the fore-and-aft feeding cam is used for moving a feeding platform fore and after and comprises a plurality of cam parts arranged on the same axis, and the left-and-right feeding cam is used for moving the feeding platform left and right. The feeding device also comprises a feeding swing stem, a feeding adjusting device, positioning parts and a set of inserted bar components, wherein the feeding adjusting device is arranged between the feeding adjusting device and the feeding platform, the positioning parts are arranged on the feeding swing stem corresponding to the cam parts and have the same number as the cam parts, and the inserted bar components can be respectively plugged and arranged in the positioning parts and are inserted in the cam parts corresponding to the positioning parts. The device only comprises one feeding swing stem, and the adjusting device is arranged between the feeding swing stem and the feeding platform so that a needle gauge can be kept unchanged when the inserted bar components are converted among different cam parts.

Description

technical field [0001] The present invention relates to a feeding device of a cycle sewing machine including a button sewing machine. Background technique [0002] When the sewing machine is nailing buttons, the feeding table realizes the linear movement of U-shaped or X-shaped patterns. In the prior art, to realize the above-mentioned movement, two sets of cams and pendulum structures are needed, one set controls the left and right feeding, and the other set controls the forward and backward movement. Trace mode, its detailed structure principle can refer to the invention patent "feeding device of circular sewing machine" with application number CN97121480.8. [0003] In actual production, it is always hoped that a sewing machine can have more than two button stitching modes. In order to solve the problem of how to realize simple and fast switching between the two modes, the above-mentioned invention patent proposes an idea. At least one of the feed cam and the front and ...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned patent, there are two pairs of swinging components. After the pattern is switched, because it is controlled by the two components, the stability of the needle pitch after the pattern switching cannot be guaranteed, so the needle pitch must be checked again, especially for fine processing. , stitch length adjustment is a necessary step

Moreover, the device involved in the above-mentioned invention patent is cumbersome to operate when adjusting, and it is also a waste of time, which is not very convenient.

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