Control method of thread trimming and presser foot lifting device on sewing machine

A control method and presser foot lifting technology are applied to the thread cutting mechanism, sewing machine components, sewing equipment and other directions in the sewing machine, which can solve the problems of poor structural adaptability, low efficiency, and the thread trimming mechanism is not suitable for long-distance transmission. Simple assembly, low noise, accurate and reliable driving stroke

Active Publication Date: 2019-03-08
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned patent documents, a stepping motor is used as the driving source to realize the functions of thread trimming and presser foot lifting, but the thread trimming mechanism is not suitable for long-distance transmission, the structure adaptability is poor, and the control of the cam structure is not flexible enough and fast, and the efficiency is low

Method used

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  • Control method of thread trimming and presser foot lifting device on sewing machine
  • Control method of thread trimming and presser foot lifting device on sewing machine
  • Control method of thread trimming and presser foot lifting device on sewing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as Figure 1 to Figure 4 As shown, the sewing machine in this embodiment includes a casing 1, a machine base 2, a presser foot bar 3 arranged on the casing 1, and a presser foot 22 arranged at the lower end of the presser foot bar 3, and the thread trimming and presser foot lifting devices include lifting Presser foot shaft 6, thread trimming shaft 7, drive motor 5 capable of forward and reverse rotation, foot pedal capable of controlling forward and reverse rotation of drive motor 5, thread trimmer mechanism 4 that is positioned at the position directly below presser foot 22 on the support 2, The casing 1 is fixed with a mounting seat 14, and the driving motor 5 is fixed on the mounting seat 14 through connecting bolts 15; , the output shaft of the driving motor 5 is respectively fixed with a thread trimming cam 8 and a presser foot lifting cam 9, and both the thread trimming cam 8 and the presser foot lifting cam 9 have a protruding portion 9b and an idle stroke ...

Embodiment 2

[0046] The specific structure of the thread trimming and presser foot lifting device in this embodiment is the same as that of Embodiment 1, the difference is that the control method in this embodiment includes the following steps:

[0047] a. Unloading: After turning on the sewing machine, step on the pedal to the bottom to make the drive motor 5 rotate clockwise, the presser foot lever 3 and the presser foot 22 rise to the preset height position driven by the drive motor 5, and the operator will prepare Good fabric to be sewn is placed below the presser foot 22;

[0048] b. Sewing: loosen the pedal, make the driving motor 5 rotate counterclockwise to the initial position, the presser foot lever 3 and the presser foot 22 reset, the presser foot 22 presses the fabric, the operator controls the sewing pedal of the sewing machine, and the sewing machine sews normally until the Wheel sewing process ends;

[0049] c. Thread trimming and material retrieving: the operator steps on ...

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PUM

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Abstract

The invention provides a control method of a thread trimming and presser foot lifting device on a sewing machine, belongs to the technical field of apparel manufacturing equipment, and solves the technical problems of low sensitivity, low efficiency and the like of the thread trimming and presser foot lifting device of the existing sewing machine. The sewing machine comprises a machine enclosure,a machine seat, a presser foot bar and a presser foot; the thread trimming and presser foot lifting device comprises a thread trimming mechanism, a presser foot lifting shaft, a thread trimming shaftand a driving motor; a thread trimming cam and a presser foot lifting cam are fixedly arranged on an output shaft of the driving motor; the thread trimming cam and the presser foot lifting cam are both provided with protruding portions; the protruding portions of the thread trimming cam and the presser foot lifting cam are staggered; the thread trimming cam can drive the thread trimming shaft to move axially through a thread trimming crank; the end portion of the thread trimming shaft is connected with the thread trimming mechanism; the presser foot lifting cam can drive the presser foot lifting shaft to rotate through a presser foot lifting swinging rod; and the presser foot lifting shaft is connected with the presser foot bar. The special control method provided by the invention operatesand controls the thread trimming and presser foot lifting device and is sensitive, high in efficiency, precise and reliable.

Description

technical field [0001] The invention belongs to the technical field of garment manufacturing equipment, and relates to a sewing machine, in particular to a control method for a thread trimming and presser foot lifting device on the sewing machine. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. The sewing machine can sew fabrics such as cotton, fiber crops, silk, wool, and artificial fibers, and products such as leather, plastics, and paper. Sewing machines are generally composed of four parts: feeding device, machine base, transmission and accessories. The movement of each mechanism is reasonably coordinated, and the cycle works to sew the sewing materials together. During the sewing process, the sewing machine will use the functions of automatic thread trimmer and automatic presser foot lifter; currently, sewing m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B65/00D05B29/02
CPCD05B29/02D05B65/00
Inventor 王志李卫超
Owner JACK SEWING MASCH CO LTD
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