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Sewing machine

A sewing machine and thread technology, applied in sewing machine components, sewing equipment, program-controlled sewing machines, etc., can solve problems such as cloth movement and deviation, and achieve the effect of improving work efficiency and reliable sewing operation.

Inactive Publication Date: 2003-11-26
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present applicant first applied for the invention of a sewing machine that uses the same drive mechanism to operate the thread trimming mechanism and the presser foot lifting mechanism. , the presser foot lifting mechanism is also linked, and the presser foot will temporarily leave, so there is a problem that the fabric moves and the starting position of the next stitch deviates from the desired position

Method used

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Embodiment Construction

[0050] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0051] In this embodiment, taking the sewing machine of the present invention as an example, a backtack sewing machine for forming zigzag stitches with flat seams will be described. The backtacking sewing machine of this embodiment sews according to the prescribed sewing pattern stored in the unillustrated memory by the cooperative action of the needle and the shuttle, and after sewing, according to the tangent included in the sewing pattern Command or presser foot lift command starts thread trimming and presser foot lift operation at the specified timing.

[0052] The backtack sewing machine of this embodiment includes: a thread trimming mechanism 10 for cutting the upper thread and the lower thread immediately after the sewing operation is finished, and a presser foot lifting mechanism 30 for raising the presser foot 71 of the presser foot device 70 before a...

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Abstract

To achieve the efficiency in the sewing work in a sewing machine having a thread cutting mechanism, a presser lifter mechanism and a thread sweeping mechanism by checking the operation of the presser lifter mechanism as required while preventing the delay in the cycle time simplifying the mechanisms and the controls. The sewing machine has the thread cutting mechanism 10, the presser lifter mechanism 30, the thread sweeping mechanism 50 and a drive means for driving the mechanisms is provided with the first cam 61 which has a thread cutting operation part for converting rotary driving forces of a single pulse motor 80 as the drive means to those to match the thread cutting mechanism 10 and the second cam 62 which has a thread sweeping operation part and a presser lifting operation part for converting rotary driving forces of the pulse motor 80 to those to match the thread sweeping mechanism and the presser lifter mechanism. The first cam and the second cam are arranged in such a phase difference as to operate the thread cutting mechanism, the thread sweeping mechanism and the presser lifter mechanism sequentially with the rotation of the pulse motor.

Description

technical field [0001] The invention relates to a sewing machine with a thread cutting mechanism, a presser foot lifting mechanism and a thread wiping mechanism. Background technique [0002] In recent years, sewing machines having a thread cutting mechanism for cutting the thread immediately after sewing, a presser foot lifting mechanism for moving the presser foot device upward, and a thread wiping mechanism for loosening the upper thread have been put into practical use. [0003] Above-mentioned conventional sewing machine, owing to be provided with each drive mechanism that is used to drive thread cutting mechanism, thread trimming mechanism, presser foot lifting mechanism, so structure is complicated and parts quantity is many, and sewing machine is also cumbersome, large-scale, and because as sewing Most of the main operators of sewing machines in the factory are women, so the operation of using heavy benzene becomes a burden, and there is a problem that the work effic...

Claims

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Application Information

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IPC IPC(8): D05B69/12D05B3/14D05B19/12D05B29/02D05B65/02D05B65/06D05B69/30
CPCD05B65/06D05B29/02D05B69/30D05B65/00
Inventor 皆川忠义小川达矢
Owner JUKI CORP
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