Unlock instant, AI-driven research and patent intelligence for your innovation.

Double needle sewing machine

A sewing machine and needle bar technology, applied in the direction of sewing machine components, sewing machine needle holders, sewing equipment, etc., can solve the problems of not being able to lift the upper thread, and applying inertial force on the upper thread, so as to achieve sewing quality and prevent the formation of undesired stitches or the effect of not being able to form

Active Publication Date: 2009-01-28
JUKI CORP
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the sewing machine is stopped near the top dead center of the needle bar, even if the sewing machine is restarted and the balance continues to rise, compared with the case where the balance rises to the top dead point at once, since sufficient inertial force cannot be applied to the upper thread, So the upper thread cannot be lifted enough, resulting in untensioned slack stitches

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double needle sewing machine
  • Double needle sewing machine
  • Double needle sewing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Below, refer to Figure 1 to Figure 1 2. One embodiment of the twin-needle sewing machine according to the present invention will be described.

[0034] Such as figure 2 As shown, the double-needle sewing machine 1 according to this embodiment has a needle bar holding portion 5 which is driven by the spindle motor 3 ( figure 1 ) to move up and down. The needle bar holding part 5 is connected to the needle bar crank link 6, and the needle bar crank pin 9 is inserted into the through hole 6a of the needle bar crank link 6, and the needle bar crank pin 9 is fastened to the eccentric of the needle bar crank 8. position, the needle bar crank 8 is fastened to one end of the sewing machine main shaft 2 . Thereby, the needle bar holding part 5 is connected to the eccentric position of the needle bar crank 8 via the needle bar crank link 6, and the rotation of the sewing machine main shaft 2 driven by the spindle motor 3 causes the needle bar crank 8 and the needle bar crank...

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a two-needle sewing machine capable of reliably forming the expected stitch according to the expected sewing pattern on the condition of changing the stitch formed before the stick holding portion stopping and after the stick holding portion stopping, and improving the quality of the sewing product. The initial stitch is formed under the condition that judging the set position of changing switch part (35) before the up and down movement of the stick holding portion (5) stops and after it stops by utilizing the judging unit (50), before decreasing the stick (12) and switched to form the initial stitch, the main shaft motor (3) is driven in reverse rotation, at least one of the sticks (12) blocked with the stick holding portion (5) raises to the top dead center, andthe main shaft motor (3) is driven in forward rotation, then the set position of the switch part (35) corresponding to forming the initial stitch to switch the stick (12) is blocked or relieved corresponding to the stick holding portion (5).

Description

technical field [0001] The present invention relates to a double-needle sewing machine, which has a single-needle stop function that can make one of the two needles rest, and can form a stitch with two needles or a single-needle stitch with any one of the needles. Background technique [0002] At present, for example, as described in Patent Document 1 and Patent Document 2, a double-needle sewing machine is used. When sewing the panel on the edge of the opening of the pocket, two needles are used to form a double-needle stitch on the peripheral edge of the center of the opening. At the same time, only one of the two needles is used to form a single-needle stitch at the end of the opening. [0003] Such a conventional double-needle sewing machine has a needle bar holding portion that is connected to the main shaft of the sewing machine via a crank so that the main shaft of the sewing machine is rotated in the forward direction by a main shaft motor to move up and down. Two n...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D05B55/16D05B55/14
Inventor 小川达矢平泽裕高濑秀纪薄井彻
Owner JUKI CORP