Middle foot-pressing device for sewing machine

A sewing machine and medium-pressure technology, applied in the direction of cloth pressing mechanism, sewing machine components, program-controlled sewing machines, etc., can solve the problems of production efficiency decline, sewing instability, etc., and achieve the effect of improving productivity

Active Publication Date: 2011-06-08
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, as in Patent Document 2, the height of the bottom dead center of the intermediate presser can be adjusted even during the sewing operation. If it is such an intermediate presser device, the variable amount of one stitch of the height of the bottom dead center must be set to Set within the range where the pulse motor will not lose step, therefore, it is necessary to limit the spindle speed during this adjustment
Therefore, in response to the variable spindle speed change, when the speed becomes low, there is a concern that the production efficiency will decrease due to the decrease of the cycle time.
In addition, there is a concern that sewing may become unstable due to spindle speed deviation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Middle foot-pressing device for sewing machine
  • Middle foot-pressing device for sewing machine
  • Middle foot-pressing device for sewing machine

Examples

Experimental program
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Embodiment Construction

[0066] (The overall structure of the electronic circulation sewing machine)

[0067] based on Figure 1~Figure 16 The embodiment of the present invention is explained.

[0068] In this embodiment, as a sewing machine, an electronic circulation sewing machine will be described as an example. The electronic circulation sewing machine is a sewing machine that has a holding frame as a cloth holding portion that holds the cloth to be sewn, and the holding frame is moved relative to the needle to form on the cloth held by the holding frame The stitch based on the specified sewing data (stitch pattern).

[0069] Here, it is defined as follows: the direction in which the needle 108 described later moves up and down is defined as the Z-axis direction (up and down direction), and the direction orthogonal to it is defined as the X-axis direction (left-right direction). The direction in which both sides of the X-axis direction are orthogonal is referred to as the Y-axis direction (front-rear d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The provided middle presser foot device comprises: the foot, a main shaft with opposite drive motor to drive needle and foot, a regulation axis with drive motor to regulate the lower dead-point height, a memory to store former height data and yarn trace data, and the control part to keep main shaft speed and regulate former height value.

Description

Technical field [0001] The present invention relates to a middle presser foot device of a sewing machine that performs pattern formation sewing such as embroidery. Background technique [0002] In embroidery sewing, etc., sewing machines that perform pattern formation and sewing based on pre-input sewing data are known as the "medium presser foot" of the sewing machine. The sewing product moving in the horizontal direction (XY direction) while being held will not rise with the needle when the needle is raised. [0003] The middle presser foot is formed as follows. The upper side of the sewing product has an amplitude smaller than the needle, and moves up and down in synchronization with the needle, so that when the needle is pulled out from the sewing product, the sewing product is pressed downward. When sewing, it can be avoided to the upper side so as not to hinder the replacement of the sewing product. [0004] However, in the pattern forming and sewing of the sewing machine, th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B29/00
CPCD05B19/16D05B29/02D05B29/08D05B69/12D05B69/30
Inventor 洼田次勇
Owner JUKI CORP
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