CN1138029C - Sewing machine thread adjusting device controlled by solenoid valve - Google Patents
Sewing machine thread adjusting device controlled by solenoid valve Download PDFInfo
- Publication number
- CN1138029C CN1138029C CNB001068563A CN00106856A CN1138029C CN 1138029 C CN1138029 C CN 1138029C CN B001068563 A CNB001068563 A CN B001068563A CN 00106856 A CN00106856 A CN 00106856A CN 1138029 C CN1138029 C CN 1138029C
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- line
- tension
- stroke
- sewing machine
- electromagnetic valve
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- 238000009958 sewing Methods 0.000 title claims abstract description 43
- 230000035699 permeability Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 description 17
- 230000003014 reinforcing effect Effects 0.000 description 13
- 239000004744 fabric Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
An object of the present invention is to provide a solenoid valve wire adjusting device which can accurately control a wire tension by a solenoid without using an expensive voice coil motor. Is a thread adjusting device 1 of a sewing machine controlled by a solenoid valve comprising a thread adjuster composed of a pair of thread adjusting disks formed by a fixed disk and a movable disk and a solenoid valve 60 acting on the adjustable disk 67 and giving thread tension to the sewing machine. Thus, when the electric power is applied to the solenoid valve 60 at a constant time, the urging force generated in the specific stroke is substantially constant, the movable stroke range of the movable plate 67 capable of controlling the thread adjuster 19 is set in the specific stroke zone W, and the tension of the sewing machine is controlled by controlling the electric power applied to the solenoid valve 60.
Description
Technical field
The present invention relates to the sewing machine thread regulator that changes the solenoid control of line tension by automatically controlled.
Background technology
So far, as the sewing machine thread regulator that changes line tension with electric control the sewing machine thread regulator that has been equipped with line adjuster (adjustment dish, rotation tension force etc.) and has acted on the drive unit of this line adjuster is arranged.
Past is used combination that voice coil motor, proportion magnetic valve, air slide and proportion magnetic valve are for example arranged etc. in this drive unit.For example strengthen, reduce the pressing force or the enhancing of adjustment dish, the load that reduces to rotate the tension force rolling disc with these drive units of electric control, thereby in making, continuously change to the tension force of reaching the standard grade.
But there is following point in the drive unit (combination of voice coil motor, ratio electromagnetism, air slide and proportion magnetic valve etc.) that above-mentioned existing line adjusting device uses.
At first, about voice coil motor, because its moving part (spool) is gone up volume coil is arranged, the lead-in wire that coil electricity is used is with the motion campaign of moving part, so exist because pressure breaks and the problem of the poor durability of long-term use.
Though voice coil motor has advantages such as linear characteristic, response are good, the inner magnet that needs the strong high price of magnetic force, the high shortcoming of price is arranged.So use voice coil motor will obtain big tension force in the drive unit of line adjuster, need to increase above-mentioned magnet, thereby can increase the cost of line adjuster.
And, even the energising amount of proportion magnetic valve, ratio solenoid electric valve is certain, also can change motive force by the stroke of moving part.So all change in the relevant line adjusting device with motive force with line tension at stroke, come difficulty of control line warp tension ratio with the energising amount of control ratio electromagnetic valve, existence is the problem of control line tension force correctly.
Summary of the invention
At above-mentioned actual conditions, the purpose of this invention is to provide the voice coil motor that need not use high price and the sewing machine thread regulator of realizing the solenoid control of correct control line tension force with electromagnetic valve.
The present invention is to be purpose to address the above problem, comprising the line adjuster formed by a pair of line adjustment dish of fixed disk and movable plate and acting on movable plate and provide to sewing machine thread in the sewing machine thread regulator of solenoid control of electromagnetic valve of tension force, it is characterized in that when added electric weight one timing of above-mentioned electromagnetic valve, in specific stroke, can produce the motive force of almost fixed, the movable stroke range that can control the movable plate of above-mentioned line adjuster is set at this given stroke interval, be added to the electric weight of this electromagnetic valve by control, thereby control sewing machine thread tension force.
Thus, owing to the stroke range of the moving part that acts on the line adjuster is set at the given stroke interval that motive force can not change because of stroke, so easily correct control line tension force.It is the variation of wire size number, the rugosity that can cause line also changes thereupon or line disconnects owing to the pressure of adjustment dish, thus, even the stroke of moving part changes, the changes stroke of these moving parts also can not influence the motive force of drive unit, thereby can eliminate the unstability that is caused line tension control by changes stroke.
And because the coil of electromagnetic valve does not twist in moving part, and at standing part, so the energising of voice coil motor can not broken owing to pressure with lead-in wire, durability is strong, just can obtain big motive force with inexpensive magnet.Thereby can obtain strong, the inexpensive line adjusting device of durability.
And, because electromagnetic valve produces square motive force that is directly proportional about and adding electric current, so along with the motive force that produces becomes big, it is big that the motive force variable quantity also becomes, therefore little motive force can obtain the minor variations amount, can realize small tension variation, and big motive force can obtain big variable quantity, the tension variation scope is bigger, so carry out tension adjustment easily.
The present invention is to be feature with above-mentioned movable stroke corresponding to the sewing machine thread rugosity.Therefore, can realize that little stroke reaches tension variation fast.
The present invention can be that the simple structure of the stage portion used of fixed size realizes by the motive force between given stroke of making that forms on the magnetic circuit loop.
Description of drawings
[Fig. 1]
It is Sewing machines oblique view with line adjusting device of the invention process form.
[Fig. 2]
It is the side view of the line adjusting device of Fig. 1.
[Fig. 3]
It is the exploded perspective view of the sewing machine thread regulator of Fig. 1.
[Fig. 4]
It is the sectional view of electromagnetic valve of the line adjusting device of Fig. 1.
[Fig. 5]
It is the curve map of the corresponding motive force of stroke of the electromagnetic valve of presentation graphs 4.
[Fig. 6]
It is the curve map of the corresponding motive force of current value of the electromagnetic valve of presentation graphs 4.
[Fig. 7]
It is the block diagram of the structure example of expression sewing machine control circuit.
[Fig. 8]
It is the circuit diagram of circuit structure example of the Electromagnetic Drive of expression line adjusting device.
[Fig. 9]
Be the figure of expression by an example of the button hole eyelet eye of button hole lock stitching sewing machine.
The specific embodiment
With reference to the accompanying drawings the invention process form is described.
As shown in Figure 1, the line adjusting device 1 of this example is provided in a side of on the cradle portion 81 of Sewing machines 100, and the device of tension force is provided to reaching the standard grade from cantilever 82 at the supply source of reaching the standard grade.This Sewing machines 100 is the industrial button hole interlock seam sewing machines that form the button hole eyelet, forms button hole eyelet eye 90 as shown in Figure 9 on the clothes cloth of making on the table 83.Button hole eyelet eye 90 is mainly formed by the latasuture portion 92,92 that is located at button hole ditch about 91 with as the seam of the reinforcing up and down portion 93,93 of ending seam portion.Give as security 86 with sliding panel 85 and cloth and clamp clothes cloth M and the Y direction is sent in control, will sell 84 by the pin swinging mechanism of in sewing-machine support portion 81, establishing (figure slightly) simultaneously and put directions X, formation button hole eyelet eye 90.And in the process of making, fall cloth sheet cutter (cloth is cut り メ ス) 87, and open button hole ditch 91, finish when making, cut off, keep reaching the standard grade with tangent line folder 88.
And, if buttonhole button hole eyelet eye, seam portion till buttonhole partly becomes so.
When making button hole eyelet eye 90, need to change and each seam portion the last line tension of for example reinforcing seam portion 93,93 and latasuture portion 92,92 with this button hole interlock seam sewing machine 100.Promptly the kerf spacing owing to reinforcing seam portion 93,93 is bigger, thus need reduce to go up line tension, and the kerf spacing of latasuture portion 92,92 is smaller, so need to strengthen upward line tension.And, change size, the shape of button hole eyelet eye 90, when changing clothes cloth M or intact seam quality condition, need will be at the last line tension change setting in above-mentioned reinforcing seam portion 93,93, the latasuture portion 92,92 and separately the slightly variant value of standard value.Therefore when the making of each the seam portion that carries out button hole eyelet eye 90, by the electric control of above-mentioned line adjusting device 1, line tension on the appropriate change automatically.
As Fig. 2, shown in Figure 3, line adjusting device 1 structurally comprises base member 69, line adjuster 19, the electromagnetic valve 60 as drive unit, movable pin 68, and the control circuit 40 (Fig. 7) of the electromagnetic valve 60 of the control Sewing machines 100 of holding concurrently or the drive circuit 50 (Fig. 8) of electromagnetic valve 60 etc.
This electromagnetic valve 60 at electrical current one regularly can get characteristic shown in the B-H loop shown in Figure 5 by the stroke motive force.Just can obtain the interval W of given stroke that stroke that motive force is not subjected to spool 61 influences.
The fixed position of movable pin 68 and spool 61 can suitably be adjusted by the degree of tightening of nut 70 in above-mentioned line adjusting device 1, set the position of tightening of above-mentioned nut 70 like this, the stroke interval of spool 61 that makes spool 61 act on the state of line adjuster 19 is contained in the interval W of above-mentioned given stroke.Here, spool 61 state that acts on line adjuster 19 be meant from fixed disk 66, movable plate 67 be sandwiched in base member 69 and 68 of movable pins and directly state of contact be sandwiched in state a pair of adjustment dish to reaching the standard grade.
The stroke that acts on the spool 61 of line adjuster 19 to be set in the interval W ' of given stroke, for example unscrewing under nut 70 states, the overhang W ' at the front end 61b of the spool 61 at electromagnetic valve rear is given prominence in measurement on one side, movable pin 68 68c of ditch portion directly are connected at movable plate 67 and fixed disk 66 under the state of base member 69 on one side and rotate with methods such as drivings, overhang W ' is screwed to position corresponding to scope W from the S value of Fig. 5, the nut 70 of screwing in this position, fixedly movable pin 68 and spool 61 can be finished.
The stroke of spool 61 preferably is set in the suitable value (about 1mm) of suture that Sewing machines is spendable Yu the thickest at least.Also can be set in and normally used suture rugosity (0.2～0.3mm) suitable value or be set in value (0.1mm unit) the thickest or after normally used suture rugosity adds small offset.
And stroke size can obtain characteristic shown in Fig. 6 B-H loop by electrical current one motive force fixedly the time.Be stroke size fixedly the time, can obtain becoming greatly, also become big characteristic corresponding to the variable quantity of the motive force F of electrical current C along with outputing to electromagnetic valve 60 electrical current C.
By giving coil 64 energisings, electromagnetic valve 60 is installed along the direction that drives movable pin 68 to incoming direction.Like this, along with electrical current increases, can increase the motive force of introducing movable pin 68.
The motive force [F] that DC electromagnetic valve produces can be represented by following formula in theory.
F＝1/2*U2*dP/dX
U＝NI
U: magnetomotive force
P: magnetic circuit permeability
N: coil turn
I: exciting current
To in specific stroke, produce the motive force of fixed size, though it is certain by the variable quantity that makes above-mentioned magnetic circuit permeability, can obtain by following formula, but in general magnetic circuit loop, if stroke changes, then because leakage field changes, the reasons such as magnetism characteristic of the magnetic material of using in the magnetic circuit are difficult to obtain stable motive force characteristic.
But, in the present invention by to the fixed magnetic pole of the attraction side that constitutes the magnetic circuit loop and the opposed portion of spool 61, the stage portion 65a of specific ratios is set, can spool 61 decide stroke permeability be set to necessarily, can obtain the motive force of the fixed size between given stroke.
And, from above-mentioned formula, find out square motive force that is directly proportional that produces with adding electric current.Be that motive force becomes greatly along with the motive force grow that produces the variable quantity that electric current changes.Therefore, can obtain trickle variable quantity, can realize small tension variation, can obtain big variable quantity, can realize tension variation in a big way, so adjust tension force easily with big motive force with little motive force.
But, in the stitch data of button hole eyelet eye, comprised the relevant reinforcing seam portion line tension data of line tension when reinforcing seam portion and make, and the relevant seam sidepiece line tension data of line tension when making with latasuture portion.Like this, these reinforce seam portion's line tension data and latasuture portion line tension data respectively have its standard value, simultaneously by the data input of using guidance panel 21, can be in deciding scope be that the center is along positive and negative two directions change data with the standard value.Electromagnetic valve 60 to line adjusting device 1 carries out the energising that size of current is proportional to above-mentioned reinforcing seam portion's line tension data and latasuture portion line tension data.Data value can change at interval by institute's definite value, and by this change, the current value of energising also can be by decide change at interval in the electromagnetic valve 60 of line adjusting device 1.
Like this, be set in the scope X1 of Fig. 6, be set in the scope X2 of Fig. 6 according to the electrical current of the electromagnetic valve 60 of latasuture portion line tension data setting according to the electrical current of the electromagnetic valve 60 of above-mentioned reinforcing seam portion line tension data setting.Like this, the line tension when reinforcing seam portion makes is set in the little value scope, in the line tension when latasuture portion makes is set on a large scale.
And, reinforce seam portion's line tension data or latasuture portion line tension data if change, then accompany therewith, the electrical current of electromagnetic valve 60 outputs changes in scope X1, X2.The spacing of minimum spacing in both sides' scope X1, X2 that changes equate, as the Δ C of Fig. 6, and the line tension in the time of just can adjusting reinforcing seam portion and make with small quantity, the line tension in the time of in bigger scope, changing latasuture portion and make.
In Fig. 7, Fig. 8, the control device of line adjusting device 1 is held a concurrent post by Sewing machines 100 control circuits 40.Control circuit 40 is except having CPU41, the ROM of storage control program and control data (Read Only Memory) 42, the EEPROM (Electrically Erasable and Programmable ROM) 43 of the stitch data that storage is imported through guidance panel 21 etc., constitute the RAM (Random Access Memory) 44 of the workspace of CPU41, carry out the pulse motor control circuit 47 of drive controlling of the pulse motor of pulse motor that work feed uses and pin vibration usefulness, and outside clock circuit 45 and the reset circuit 46 etc., also have the D/A converter 49 and the drive circuit 50 that relate to line adjusting device 1 driving.
And, by not shown I/O interface, carry out the input etc. of stitch data guidance panel 21, detect the operation of Sewing machines pedal pedal sensor 22, detect the servo-detector 23 of drive amount of the pulse motor of pulse motor that work feed uses and pin vibration usefulness, be connected on the control circuit 40 with the hot nose 24 of 87 positions of test pin rod and cloth sheet cutter etc.
D/A converter 49 is to convert the data signal from CPU41 to analog control signal, and outputs to drive circuit 50.
Drive circuit 50 is to keep stable operational amplifier OPI and set control signal for institute and decide multiplying power and while and export the constant-current circuit of deciding electric current I OUT that is proportional to control signal etc. to electromagnetic valve 60 and constitute by making by negative-feedback from the control signal of D/A converter 49.Constant-current circuit is by amplifier OP2, Field-Effect Transistor Q1, and resistance R 1, and R2, RS constitutes.
The following describes the running of the Sewing machines 100 and the line adjusting device 1 of said structure.At first, set each parameter of button hole eyelet eye with guidance panel 21.Reinforcing seam portion line tension data and latasuture portion line tension data have been comprised in this parameter.Preestablish and be stored into EEPROM43, during use, the data that only need access storage get final product.
Finish after the data setting, clothes cloth M is put making on the platform 83, enabling signal takes place from pedal sensor 22 in operating pedal.After producing enabling signal, control sewing machine electromotor, work feed pulse motor, pin vibratory impulse engine, carry out latasuture portion and reinforce making of seam portion with CPU41.Like this, in the making of each one from CPU41 output line tension control signal, by D/A converter 49 and drive circuit 50, at electromagnetic valve 60 by electric current corresponding to the line tension signal.
As long as electromagnetic valve 60 is by the electric current corresponding to the line tension control signal, the motive force of corresponding electrical current just outputs to spool 61.Like this, this motive force directly is communicated to movable pin 68, and movable pin 68 is introduced into, and above-mentioned thus a pair of adjustment dish is pushed mutually, provides resistance (tension force) to the line between the adjustment dish.
Like this, respectively making regularly change from the line tension control signal of CPU41 output with setting data.Accompany therewith, the motive force of electromagnetic valve 60 also changes, and the pressure that makes the adjustment dish is that tension force also changes.For example, regularly change to the line tension of representing latasuture portion line tension data, make in reinforcing seam portion and regularly change to the line tension that seam portion line tension data are reinforced in expression making of latasuture portion.And, though electromagnetic valve 60 corresponding to the motive force F of electric weight C B-H loop just like Fig. 6, preferably the compensating line tension control signal so that the increase and decrease of the line tension of corresponding expectation compensates F, thereby obtains more accurate line tension.
As mentioned above, line adjusting device 1 according to the Sewing machines 100 of this example, owing to the stroke of the spool 61 that acts on line adjuster 19 is set at motive force can be because of the interval W of the given stroke that stroke changes, so can not make line tension control unstable because of stroke, realize correct line tension control easily.And, to compare with existing line tension device with voice coil motor, durability improves, cost reduces.
And, the motive force of electromagnetic valve 60 square increases with electrical current, the direction that increases the line tension growth owing to the motive force along electromagnetic valve 60 is provided with electromagnetic valve 60, so carry out inching with little line tension easily, carry out tension adjustment on a large scale easily with big line tension, convenient to line tension control.And, adopt and form by left and right sides latasuture portion 92,92 reach the seam portion 93 that reinforces up and down, the button hole interlock seam sewing machine of the 93 button hole eyelet eyes 90 that constitute, the reinforcing seam portion 93,93 that produces little line tension is carried out inching easily, to producing the latasuture portion 92 of bigger line tension, 92 adjust easily significantly, and effect is remarkable.
Sewing machine thread regulator of the present invention is not limited to the line adjusting device 1 of the Sewing machines 100 of this example, the Sewing machines of using line adjusting device can also be applicable to this seam sewing machine, other industrial various Sewing machiness such as foot-operated Sewing machines except the button hole interlock seam sewing machine.And the structure of line adjuster is clamped the type of line feeding tension except being applicable to the adjustment dish, also is applicable to the line adjuster that rotates various models such as tension force.And, not that the motive force of electromagnetic valve is directly passed to the type of line adjuster, and can be the type of passing to the line adjuster through binding parts, transferring elements.
Invention according to claim 1 record, be set in motive force and the irrelevant given stroke interval of stroke owing to act on the moving part stroke of line adjuster, do not control unstable situation so do not have the line tension that occurs owing to changes stroke, realize correct line tension control easily.And, to compare with existing line adjusting device with voice coil motor, durability improves, and cost reduces.
Claims (3)
1. one kind comprises the line adjuster be made up of a pair of line adjustment dish of fixed disk and movable plate and acts on movable plate and give the sewing machine thread regulator of solenoid control of the electromagnetic valve of sewing machine thread tension force, it is characterized in that:
The added electric weight one of above-mentioned electromagnetic valve regularly, in specific stroke, can produce roughly a certain size motive force, the movable stroke range that can control the movable plate of above-mentioned line adjuster is set at this given stroke interval, is added to the electric weight of this electromagnetic valve by control, the line tension of control Sewing machines.
2. the line adjusting device of Sewing machines as claimed in claim 1 is characterized in that: but above-mentioned dynamic stroke is set equal to the value in the rugosity of the employed sewing machine thread of Sewing machines.
3. the line adjusting device of Sewing machines as claimed in claim 1 is characterized in that: above-mentioned electromagnetic valve forms on the magnetic circuit loop sets the stage portion that the magnetic circuit permeability is used.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11264899A JP4043642B2 (en) | 1999-04-20 | 1999-04-20 | Sewing thread tension device by electromagnetic solenoid |
| JP112648/1999 | 1999-04-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1271034A CN1271034A (en) | 2000-10-25 |
| CN1138029C true CN1138029C (en) | 2004-02-11 |
Family
ID=14592000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001068563A Expired - Lifetime CN1138029C (en) | 1999-04-20 | 2000-04-20 | Sewing machine thread adjusting device controlled by solenoid valve |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4043642B2 (en) |
| CN (1) | CN1138029C (en) |
| CZ (1) | CZ302055B6 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403168B (en) * | 2007-10-05 | 2013-05-22 | Juki株式会社 | Line tension control device of sewing machine |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002177679A (en) * | 2000-12-13 | 2002-06-25 | Juki Corp | Sewing machine for root winding button sewing and apparatus for stitch balancing thread tension of sewing machine |
| JP3836362B2 (en) * | 2001-02-02 | 2006-10-25 | Ｊｕｋｉ株式会社 | Sewing thread tension device |
| JP4692044B2 (en) * | 2005-03-30 | 2011-06-01 | ブラザー工業株式会社 | Sewing thread tension device |
| CN101139785B (en) * | 2007-09-26 | 2011-08-17 | 中捷缝纫机股份有限公司 | Control device for thread gripper of sewing machine |
| JP5427438B2 (en) * | 2009-02-27 | 2014-02-26 | Ｊｕｋｉ株式会社 | sewing machine |
| CN102220676B (en) * | 2010-04-19 | 2012-11-14 | 启翔针车（上海）有限公司 | Sewing machine needlework supplying device |
| CN102061577B (en) * | 2011-01-21 | 2013-04-10 | 佛山市源田床具机械有限公司 | Turntable upper thread supply system of quilting embroidery machine |
| CN102071548B (en) * | 2011-02-13 | 2013-09-04 | 浙江越隆缝制设备有限公司 | Tension adjuster of belt thread pressing device for towel embroidering machine |
| CN102634938B (en) * | 2012-05-05 | 2013-01-30 | 宁波舒普机电科技有限公司 | Yarn trapper for sewing machine |
| CN106567204A (en) * | 2015-10-08 | 2017-04-19 | 诸暨市乐业机电有限公司 | Thread locking device and embroidery machine including the same |
| CN105386258B (en) * | 2015-12-11 | 2017-12-26 | 杭州经纬电子机械制造股份有限公司 | Automatic wire feeder and its operating method |
| CN111235772B (en) * | 2020-02-26 | 2024-07-26 | 舒普智能技术股份有限公司 | Wire clamping device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1013933B (en) * | 1974-05-06 | 1977-03-30 | Necchi Spa | UPPER THREAD TENSION REGULATOR UNIT WITH AUTOMATIC TENSION RELEASE DEVICES |
| JPS6427586A (en) * | 1987-07-24 | 1989-01-30 | Janome Sewing Machine Co Ltd | Needle thread control sewing machine corresponding to kinds of yarns |
| JP4079286B2 (en) * | 1995-12-13 | 2008-04-23 | Ｊｕｋｉ株式会社 | Sewing thread tension control device |
-
1999
- 1999-04-20 JP JP11264899A patent/JP4043642B2/en not_active Expired - Fee Related
-
2000
- 2000-04-19 CZ CZ20001414A patent/CZ302055B6/en not_active IP Right Cessation
- 2000-04-20 CN CNB001068563A patent/CN1138029C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403168B (en) * | 2007-10-05 | 2013-05-22 | Juki株式会社 | Line tension control device of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000300882A (en) | 2000-10-31 |
| JP4043642B2 (en) | 2008-02-06 |
| CZ20001414A3 (en) | 2001-03-14 |
| CZ302055B6 (en) | 2010-09-22 |
| CN1271034A (en) | 2000-10-25 |
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