Method and sewing machine device for shortening residual line tail of sewing workpiece

Abstract

The invention relates to a method and sewing machine device for shortening the residual line tail of a sewing workpiece. The method comprises the steps of: driving a releasing device and a cutting device to carry out starting and returning releasing and cutting strokes by an actuating rod of an electromagnetic driver; in the stroke of the electromagnetic driver, starting the releasing device by enabling the releasing device to move to the terminal point from the starting point in the period of the first starting path, continuing the releasing state of the second starting path, and simultaneously, positioning the cutting device at the line to be sewed at the terminal point; then, in the returning process, enabling the cutting device to cut the suture line at a line cutting time point in the first returning path, and then enabling a line clamping device to clamp the cut suture line in the second returning path; and finally, enabling the releasing device to return to clamp the suture line. Thus, a line throwing rod of the releasing device delays the releasing stroke to match the cutting device to cut the suture line in the early returning process, so that the overlong residual line tail can not be reserved on the workpiece to achieve the advantage of attractive sewing surface.

Description

technical field [0001] The invention relates to a method for shortening the residual thread tail of a sewing work piece and a sewing machine device. Background technique [0002] In the general sewing machine structure, when the sewing machine is finished, a signal will be given to the solenoid valve, so that the solenoid valve will make a stroke of compression first and then protruding. Usually, the first end of the actuator rod of the solenoid valve is pivotally connected with the thread cutting device. , through the operation of the solenoid valve and the thread cutting device, the hook knife is protruded to the needle, and the sewing thread is hooked back to the cutter to cut off, and the second end of the solenoid valve is connected by a The cooperation of some link mechanisms, as shown in Taiwan Patent No. 363622 or Certificate No. M344350, enables the thread loosening device on the front side of the sewing machine to simultaneously relax the suture clamped on the tens...

AI Technical Summary

Problems solved by technology

[0004] Because the thread cutting device 3 pulls the thread back from the bur to the end of the cutter 32 to cut off the thread, the remaining thread under the work piece 5 is quite long, and for those with high quality requirements, it is often used for The appearance needs to be trimmed again, which not only detracts from the purpose of automatic thread trimming, but also increases the time and cost of processing

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