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Ring sewing machine

A sewing machine and circular sewing technology, which is applied to sewing machine components, needle holders for sewing machines, and ferrule mechanisms for sewing machines, etc., can solve problems such as difficulty in completing threading operations.

Inactive Publication Date: 2013-05-22
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, there is the following problem: after the looping thread is inserted into the inlet hole 102a, when the thread is drawn out from the outlet hole 102b, the sewing needle 101 becomes an obstacle and the threading operation is difficult to complete.

Method used

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  • Ring sewing machine
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Examples

Experimental program
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Effect test

Deformed example 1

[0075] In addition, the present invention is not limited to the above-mentioned embodiments. For example Figure 9 As shown, a tension applying device 60 capable of adjusting the fixed position of at least one pulley 61a among the two pulleys 61a, 61b along the moving direction of the base 62 may also be used. Specifically, on the base 62 , a groove 62 a is formed along the moving direction of the base 62 . A guide pin 63 is provided upright on the bottom surface of one pulley 61a. The guide pin 63 is formed so as to be inserted into the groove 62a, and a screw groove is formed on the surface thereof. Fastening members such as nuts 64 are fitted into the guide pins 63 from the back side of the base 62, and the position of the pulley 61a can be fixed by tightening the nuts 64 after adjusting the positions of the guide pins 63 in the grooves 62a. The base 62 is attached to the cover 45 by inserting a guide pin 65 vertically provided on the base 62 with a threaded groove forme...

Deformed example 2

[0080] Additionally, if Figure 11 As shown, a stopper 70 may be provided at the initial position of the tension applying device 50 in the sewable state, which abuts against the above-mentioned base 52 in the moving direction of the tension applying device 50 . Specifically, in the state before the phases of the sewing needle 17 and the looper 24 are shifted (a state where the pulley applies an appropriate tension to the timing belt), a stopper 70 is provided on the cover 45, and the stopper 70 is placed on the base. The initial position of the base 52 abuts against the base 52 . The stopper 70 may be formed in any form as long as it exists on the movement path of the base 52 that can move along the adjustment groove 45 a.

[0081] By adopting the above-mentioned structure, when the base 52 is moved to make the looper 24 leave the sewing needle 17 and thread the thread, and then return to the original sewing state, the user only needs to move the base 52 to abut against the s...

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PUM

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Abstract

The invention provides a ring sewing machine which preventing loosening of looper, and enhancing workability of threading through looper in the mean time. The ring sewing machine comprises an upper shaft and a lower shaft which are disposed parallel to each other; a ring shaped synchronous belt, which is disposed between the upper shaft and the lower shaft and delivers rotation thereof to the lower shaft; a needle rod, which is connected to the upper shaft and swings cooperatively with the rotation of the upper shaft; and a looper shaft, which is connected to the lower shaft, and swings cooperatively with the rotation of the lower shaft. The ring sewing machine comprises a tension applying means including two belt wheels, which are arranged on external side of the synchronous belt with the synchronous belt clamped therein; and a substrate for supporting two belt wheels, which is capable of moving on the direction intersecting the line formed by connecting the upper shaft core and lower shaft core.

Description

technical field [0001] The invention relates to a circular sewing machine which forms circular stitches through the cooperative action of a sewing needle and a looper. Background technique [0002] At present, the following circular sewing machine is known, which has a looper set below the sewing needle in the sewing machine base to be freely swingable, so that the looper thread passing through the looper is wound to the upper thread passing through the sewing needle. Form a circular stitch. [0003] In the above-mentioned sewing machine, in order to form a loop stitch, it is necessary to hook the looper on the loop formed by the upper thread of the sewing needle. Therefore, it is necessary to accurately adjust the timing of the up and down movement of the sewing needle and the swing of the looper before sewing. [0004] Additionally, if Figure 13 As shown, when the sewing machine is stopped and the looper 102 is threaded with a looper thread, it is necessary to insert th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B57/00D05B57/30D05B63/00D05B55/14
Inventor 坂本真一新井富夫
Owner JUKI CORP