CN1348027A - Needle-thread tensioning control device for sewing machine - Google Patents
Needle-thread tensioning control device for sewing machine Download PDFInfo
- Publication number
- CN1348027A CN1348027A CN 01136087 CN01136087A CN1348027A CN 1348027 A CN1348027 A CN 1348027A CN 01136087 CN01136087 CN 01136087 CN 01136087 A CN01136087 A CN 01136087A CN 1348027 A CN1348027 A CN 1348027A
- Authority
- CN
- China
- Prior art keywords
- tension force
- correction value
- solenoid
- setting
- needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B47/00—Needle-thread tensioning devices; Applications of tensometers
- D05B47/04—Automatically-controlled tensioning devices
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
A thread tension device of a sewing machine has a correction value setting means 5 setting a correction value correcting the driving current outputted to the solenoid, a storage means 60 storing the correction value, and a correction means 51 outputting a new driving current obtained by adding an electric current corresponding to the correction value to the driving current to the solenoid and correcting the tension. The invention can control thread tension to a desired value, stabilize stitch quality and improve reproducibility in a thread tension device of a sewing machine.
Description
Technical field
The present invention relates to a kind of yarn changing device by impressed current control line tension force.
Background technology
According to conventional art, as by electrical control, the needle-thread tensioning control device of the Sewing machines of variable line tension has the 1 group of yarn changing device be made up of line transfer dish etc. and the solenoid that drives yarn changing device for the crimp force of regulating this line transfer dish.In general, even solenoidal energising amount is certain, the thrust that stroke produced by movable part also can change, because the thickness line tension of line also will change, can not obtain stable line tension, the applicant at first uses has the solenoid with specific stroke section that thrust is not influenced by stroke, and the needle-thread tensioning control device that solves this shortcoming has been done other application (the patent application 11-112648 of Japan).
Fig. 8 has shown this solenoidal needle-thread tensioning control device of use.Needle-thread tensioning control device 20 is mainly by solenoid 30, be fixed on the substrate 23 on these solenoid 30 supports, be fixed in the line transfer axle 21 on the plunger 31 of solenoid 30 by line transfer spindle nut 24, be in the line transfer dish (yarn changing device) 22 that the fixed disk 22b of stationary state on the substrate 23 forms by movable plate 22a and its result, floatingly be embedded in the packing ring 25,27 on substrate 23, line transfer spindle nut 24, plunger 31 and the line transfer axle 21 and be arranged on adjustment spring 26 formations between them.
Needle-thread tensioning control device 20, between movable plate 22a and fixed disk 22b, to clamp the state of line, thrust by solenoid 30 drives line transfer axle 21, by line transfer axle 21 and substrate 23 chucking power of clamping the bottom line between movable plate 22a and the fixed disk 22b is changed continuously again and come modified line tension force, the yarn change mechanism that it is, and be called as effective tension mechanism.
But, as mentioned above, have specific formation on the interval solenoidal yarn changing device in use, even by identical current drives, the tension force that each needle-thread tensioning control device produced also has error.Fig. 4 for example, be among A, B, the C at a plurality of needle-thread tensioning control devices with Fig. 8 structure, graph of a relation to electric current that adds on the solenoid 30 and the line tension that between movable plate 22a and fixed disk 22b, produced, shown in each curve of the ABC among this Fig. 4, with respect to impressed current, the tension force difference of each yarn changing device A, B, C.The error of this tension force or electric current be because, the described line transfer axle 21 that has during needle-thread tensioning control device in assembling tightly go into the poor of amount, even or the pressure that is produced between the line transfer dish that causes owing to differing from of line transfer panel surface roughness is identical, to also different poor of the frictional resistance of line, or reason such as solenoid self-characteristic error causes.
And, because these errors, even just have from the line tension of settings such as guidance panel, to also there not being the problems such as interchangeability of setting data between each Sewing machines that has yarn changing device respectively with sample value.
In addition, in the Sewing machines of needle-thread tensioning control device with aforesaid usefulness electrical control line tension, make and make the control data that comprises needle-thread tensioning control device in the mode data, kind and sewing position according to sewings change line tension automatically, and control forming best stitching, if but the line tension that needle-thread tensioning control device produced of each Sewing machines has error, even use the same mode of making data, also have the difference of sewing quality according to different Sewing machiness, do not have repeatability, existence can not obtain the problem of certain stitching quality.
Problem of the present invention, be on can the Sewing machines needle-thread tensioning control device of control line tension force with drive current, setting value for the line tension of defined, all the time produce certain line tension, reduce relatively between each needle-thread tensioning control device, or the error to the line tension of thread tension setting value between each Sewing machines, make the sewing quality stabilisation, improve repeatability.
Summary of the invention
For solving above-mentioned problem, the present invention's 1 needle-thread tensioning control device, for example, as Fig. 2, shown in Figure 8, have: the yarn changing device (line transfer dish 22) that applies the line tension of Sewing machines, with act on yarn changing device and make the solenoid (30) that applies tension force on line and change and the tension force setting device (5,51) of setting described tension force and corresponding to the drive current of the tension force of setting by described setting device output device (54,55) to solenoid output; Described solenoid, when the stroke of this solenoid movable part (plunger 31) is made as S, the thrust of movable part is made as F, the electric current that is added on the solenoid is made as C, the minor variations of stroke and thrust is made as △ S respectively, in the time of △ F, C=one regularly, specific stroke section (W) with △ F/ △ S 0, act on the stroke of the movable part of yarn changing device, be set on the described specific stroke section, control is by the impressed current of described output device to described solenoid output, can change the tension force that applies on line, such Sewing machines needle-thread tensioning control device (needle-thread tensioning control device 20), it is characterized by, have: set the correction value setting device (5 of revising described drive current correction value, 51), with the correction value storage device (60) that stores described correction value, with corresponding to described drive current, to carry out add operation corresponding to the electric current that is stored in the described correction value in the described storage device, and resulting new drive current exported from described output device, revise the correcting device (51) of described tension force.
The present invention's 2 needle-thread tensioning control device, it is characterized by, the setting device of described correction value (5,51) has: store corresponding to the difference of a reference value storage device (52) of the reference set value of regulation line tension and the regulation setting value that will be set by described tension force setting device and described reference set value and be stored in operating means (5) in the described correction value storage device (60) as described correction value.
The present invention's 3 needle-thread tensioning control device, for example, as Fig. 2, shown in Figure 8, have: the yarn changing device (line transfer dish 22) that applies the line tension of Sewing machines, with act on yarn changing device and make the solenoid (30) that applies tension force on line and change, with the tension force setting device (5 and 51) of setting described tension force, with output corresponding to the current-order device (51 and 54) of the current instruction value that sets tension force by described setting device with export the output device (55) of described impressed current to described solenoid according to current instruction value; Described solenoid, when the stroke of this solenoid movable part (plunger 31) is made as S, the thrust of movable part is made as F, the electric current that is added on the solenoid is made as C, the minor variations of stroke and thrust is made as △ S respectively, in the time of △ F, C=one regularly, specific stroke section (W) with △ F/ △ S 0, act on the stroke of the movable part of yarn changing device, be set on the described specific stroke section, control is by the impressed current of described output device to described solenoid output, can change the tension force that applies on line, such Sewing machines needle-thread tensioning control device (needle-thread tensioning control device 20), it is characterized by, have: the correction value setting device (variable resistor 59) of the correction value of revising described electric current as the analog quantity setting, with corresponding to described drive current, to carry out add operation corresponding to the electric current of described correction value, and resulting new drive current exported from described output device, revise the correcting device (51) of described tension force.
According to the present invention, because can be by described correcting device, make the line tension of the needle-thread tensioning control device that sets value corresponding to regulation same, and with the current drives solenoid of revising, so, can reduce between each needle-thread tensioning control device, or the error of the line tension between each Sewing machines, make the sewing quality stabilisation, and can improve repeatability.
Description of drawings
Fig. 1 is the ideograph of the Sewing machines of use needle-thread tensioning control device of the present invention.
Fig. 2 is the block diagram of Sewing machines shown in the summary pie graph 1.
Fig. 3 is for tension force value of setting of each needle-thread tensioning control device and by the relation curve between the tension force of correcting device correction of the present invention.
Fig. 4 is tension force value of setting of each needle-thread tensioning control device and the relation curve between the actual tension.
Fig. 5 is the control flow chart of the embodiment of the invention 1.
Fig. 6 is the control flow chart of the embodiment of the invention 2.
Fig. 7 is the control flow chart of the embodiment of the invention 3.
Fig. 8 is the exploded perspective view of needle-thread tensioning control device structure.
Fig. 9 is the solenoidal profile of needle-thread tensioning control device.
Figure 10 be among Fig. 9 solenoidal stroke to the curve map of thrust.
Among the figure: 1-Sewing machines, 5-guidance panel, 7-firing switch, the last needle-thread tensioning control device of 10-, needle-thread tensioning control device under the 20-, 21-line transfer axle, 22-line transfer dish (yarn changing device), the 23-substrate, 24-line transfer spindle nut, 26-adjusts spring, the 30-solenoid, 31-plunger, 50-control device, 60-E
2ROM.
The specific embodiment
Embodiment 1
Below, with reference to accompanying drawing embodiments of the invention 1 are elaborated.
In Fig. 1, Fig. 2, its Sewing machines 1 is the cycle operation Sewing machines of making around circular buttonhole (sewing machine for binding buttonhole), by operation post 2, with the vertical body 3 that is arranged on the operation post 2, with from extended head 4 compositions parallel of vertical body 3 with operation post 2, be provided with needle-thread tensioning control device 10 on the head 4 respectively, on operation post 2, be provided with needle-thread tensioning control device 20 down.In addition, the structure of the structure of last needle-thread tensioning control device 10 and following needle-thread tensioning control device 20 and needle-thread tensioning control device in the past shown in Figure 8 is identical.
On Sewing machines 1, be provided with and constitute tension force setting device and the various buttons of correction value setting device and the guidance panel 5 of display unit in the present embodiment.The operator can carry out the selection of the specific mode of making and the setting of regulation parameter by this guidance panel 5, can check displaying contents simultaneously, and setting content and the situation of making are confirmed.
In addition, as shown in Figure 2, on Sewing machines 1, be provided with firing switch 7, when pressing this firing switch 71 time, electrical motor of sewing machine (not shown) and the eedle swing motor (not shown) that makes eedle (not shown) do oscillating motion along left and right directions move by the mode of making, and the beginning buttonhole is when pressing once more, no matter how make mode, electrical motor of sewing machine shuts down.
In addition, as shown in Figure 1 and Figure 2, on Sewing machines 1, be provided with control device 50 as control device.Control device 50 is by CPU51, and with the ROM52 that is connected with this CPU51, and RAM53 and various driver constitute.In addition,, be provided with and write and to eliminate by electric, even and cut off the electricity supply and also can keep the non-momentary memory E of stored contents as the correction value storage device of present embodiment
2ROM60.In addition, because non-momentary memory E
2ROM60 uses socket to load, so can take off from the control device 50 that is made of printed circuit board (PCB).
On ROM52, storing control program and control data, and the stitch data relevant with buttonhole etc.
In addition, connecting D/A converter 54 on CPU51, it can be transformed into the analogue value to the current instruction value as data signal from CPU51 output, to solenoid driver 55 outputs that are made of operational amplifier.
This solenoid driver 55 is the drive currents that detected to solenoid 20 outputs by current sense resistor 57, even the impedance difference of solenoid coil usually, also can make the drive current corresponding to described current instruction value flow to solenoid 20.
In addition, on CPU51, also connecting eedle up and down detecting sensor, eedle wave position sensor, eedle swing motor, electrical motor of sewing machine, the described electrical motor of sewing machine of driving electrical motor of sewing machine with driver with drive the not shown devices such as driver that described eedle is swung motor, by pressing described firing switch 7, according to ROM52 and non-momentary memory E
2The setting value of control program that stores among the ROM60 and control data and described guidance panel 5 etc., RAM53 as operating area and by above-mentioned various drivers, is carried out drive controlling to electrical motor of sewing machine, eedle swing motor, last needle-thread tensioning control device 10 and following needle-thread tensioning control device 20 etc.
Below, about the solenoid 30 that constitutes needle-thread tensioning control device used in the present invention, be that example is further described with the situation that is applicable to down needle-thread tensioning control device 20.In Fig. 9, solenoid 30 is made of machine frame 32, bobbin 34, coil 33, plunger 31 and magnetic part 35 etc.Plunger 31 can axially move, and non-rotatably is supported on bearing 32a, the 32b.Be adhesively fixed on the cylindrical shape magnetic part 35 on the plunger 31, the part on its periphery has formed the stage portion 35a that changes diameter from the axle center.So,, as described below, can access the specific stroke section that the thrust of plunger 31 is not influenced by stroke according to this shape.
This solenoid 30 when drive current one timing, can obtain the characteristic of the B-H loop of Figure 10 with stroke thrust.That is, can access the specific stroke section W that thrust is not influenced by plunger 31 strokes.As long as in this interval, S, plunger 31 thrusts are made as F when plunger 31 strokes are made as, when minor variations amount from thrust to solenoid 30 impressed currents that be made as C, stroke and is made as △ S, △ F respectively, the △ S/ △ F 0 of C=one timing.
Following needle-thread tensioning control device 20 only utilizes this specific stroke section W that bottom line is applied tension force.That is,, be included in the described specific stroke section W in order to make the stroke section of the plunger 31 that acts on line transfer dish 22 states, and the fixed position of setting nut 24.
The ram travel that acts on yarn changing device 22 is set on the specific stroke section W, for example, with the state that nut 24 is unscrewed, measure on one side to solenoid 30 rearward the front end 31a of outstanding plunger 31 overhang W ' (Fig. 9), the state that dock with substrate element 23 with fixed disk 22b on one side, with rotation line transfer axles 21 such as screwdrivers, overhang W ' is set " Z " value that is arranged in from Figure 10, in scope W, when reaching this position, fastening nut 24 just can be fixed line transfer axle 21 and plunger 31.
In addition, along with the drive current to solenoid 30 outputs strengthens, it is big that thrust also can become.Solenoid 30 is granted crimp force by to coil 33 energisings to the line transfer dish 22 of traction line transfer axle 21, and along with the increase of drive current, the line tension that is applied by line transfer dish 22 is just big more.That is, following needle-thread tensioning control device 20, a drive current according to variation changes the tension force of line, and controls current value according to the current-order of control device 50 with by driver 55.
But, at the drive current of the described specific stroke section of described solenoid 30 and the relation of line tension be, even drive current is carried out same setting to the relation of the setting value of line tension, but owing between each needle-thread tensioning control device, characteristic difference is arranged, so it is, not necessarily certain as needle-thread tensioning control device A, B, the C of foregoing Fig. 4.Like this,, when setting the regulation tension values,, same line tension can be obtained usually, following control be carried out for for each yarn changing device by guidance panel 5 even when each yarn changing device has various characteristics.
Promptly, the needle-thread tensioning control device of the predetermined benchmark of conduct of imagination, the line tension G of regulation is decided to be benchmark tension force, the tension force of the benchmark tension force G that produces from this benchmark needle-thread tensioning control device is decided to be reference set value, on each needle-thread tensioning control device, deduct described reference set value T from the tension force setting value U of the described benchmark tension force G that produces and be stored in E as correction value △ U
2Among the ROM60, will add corresponding to the tension force that sets by the tension force setting device and in drive current I corresponding to the new drive current of the electric current △ I of this correction value △ U and export to solenoid.
For example, suppose that with the needle-thread tensioning control device B among Fig. 4 be benchmark, the tension force from the benchmark tension force G that this needle-thread tensioning control device produced is decided to be reference set value T.Solid line among Fig. 3 has been represented the thread tension setting value of this needle-thread tensioning control device B and the relation of line tension.In addition, when the represented needle-thread tensioning control device B of solid line among the relation of thread tension setting value that makes each needle-thread tensioning control device and line tension and Fig. 3 is much the same, carry out following processing.
Under the situation of needle-thread tensioning control device A, because applying the setting value of benchmark tension force G is a ', so correction value △ U=a '-T, should be stored in the described memory by value △ U, when driving needle-thread tensioning control device A, corresponding to the line tension that sets, on drive current I, apply drive current △ I, and export new drive current I+ △ I to needle-thread tensioning control device A by output device 55 corresponding to correction value △ U.Like this, if the tension force of needle-thread tensioning control device A is set at T, in fact, to coil 33 outputs of solenoid 30 are electric current I+△ I that the tension force corresponding to T+ △ U=a ' sets value.
So as shown in Figure 3, when thread tension setting was T, whichsoever needle-thread tensioning control device can both obtain same line tension G.In addition, as shown in Figure 4, because each needle-thread tensioning control device of A, B, C all has almost parallel mobile characteristic, so, if use the electric current that on drive current I, applies △ I to drive needle-thread tensioning control device A, when the drive current I with described regulation drives benchmark needle-thread tensioning control device B, can access almost same line tension, even the setting value of line tension changes, also can keep such relation, and can cover the general full field of as shown in Figure 3 the scope of application, it is certain can making the setting value of line tension and the pass of line tension.
In addition, above explanation is carried out needle-thread tensioning control device A, and for needle-thread tensioning control device C, correction value △ U is △ U=c '-T.At this moment, other all situations with needle-thread tensioning control device A are the same except △ U is negative value.
In addition, in the above description, as the benchmark needle-thread tensioning control device, the some P from its characteristic curve determines reference current and datum line tension force with B, and this value can be set arbitrarily, also can be from the characteristic mean value decision of a lot of needle-thread tensioning control devices.
Below, the needle-thread tensioning control device of the embodiment flow chart with reference to Fig. 5 is described.At first, when connecting power supply, in step S1, judge whether to select correction value to set pattern by CUP51.This correction value is set the selection of pattern, for example is when connecting power supply, judges whether that the regulation button of pressing guidance panel 5 carries out.
Here, if do affirmative determination, in step S2, the numerical value that shows on the display unit on the guidance panel 5 in the correction value of setting that is arranged on that is constituting by 7 sections LED etc.In addition, when the state that correction value is not set, demonstration be " 0 " of default value.
Then, in step S3, judge whether that the regulation button of pressing guidance panel 5 carries out the correction value change.This change, by operator's operator of needle-thread tensioning control device (for example be assembling) under measuring in needle-thread tensioning control device 20 line tensions, press the regulation button on the guidance panel 5, to deduct correction value (the △ U=a '-T) import of reference set value T from the setting value a ' that can access the datum line tension force G that measures in advance.
S3 answers affirmatively in step,, when setting correction value by aforesaid operations, demonstrates the correction value △ U that sets at step S4 that is, simultaneously, temporarily is stored in it among the RAM53 and moves to step S5, waits for and presses the register button that is arranged on regulation on the guidance panel 5.When step S3 does not change correction value, remaining stationary moves to step S5.
Then, when when step S5 presses register button, correction value △ U is stored in non-momentary memory E as the correction value storage device at step S6
2On the ROM60, and end is to the processing of correction value setting.In addition, when not pressing register button, return step S3 and carry out above processing repeatedly.
In addition,, that is, be judged as when not being that correction value is set pattern, just move to step S7, become the Sewing machines pattern if make negatively at the step S1 of startup power supply.
Usually, in the Sewing machines pattern, because line tension is the tension force of the regulation that just must apply during from startup power supply, so provide the needle-thread tensioning control device driving command to descending needle-thread tensioning control device 20 at step S7.
Then, read in the tension force setting value (for example 70 grams) (step S8) of the tension force setting means setting that constitutes by the button of stipulating on the guidance panel 5, and this setting value is transformed to current instruction value I (step S9).Then, read in the correction value △ U (for example 2 grams) (step S10) that above-mentioned steps S6 stores, and this correction value △ U is transformed to correcting current command value △ I (step S11), and move to step S12.In addition, as shown in Figure 4, structure is, the tension force setting value and the tension force that is produced of same needle-thread tensioning control device, its gradient is roughly same proportionate relationship, and the command value of the setting value of tension force and electric current also is proportionate relationship, so the conversion of tension force setting value in step S9 and S11 and current instruction value I, the △ I of correction value △ U can be obtained with the simple proportional computing.
Then, at step S12, carry out the computing of current instruction value I+ correcting current command value △ I, determine new current instruction value I, at step S13, this current instruction value I is to D/A converter 54 outputs, from the solenoid output current I of 55 pairs of following needle-thread tensioning control devices 20 of solenoid driver.
Then,, judge whether the setting value of modified line tension force, when change, return step S8, carry out the processing of above-mentioned steps S8～S14 repeatedly at step S14.In addition, the change of this line tension except being operated by guidance panel 5, also availablely is stored in the line tension data in the mode of making or carries out the change of line tension when Sewing machines is driven and stop.
In addition, in step S14, do not have to keep present tension force in the line tension change.In addition, the processing at step S7～step S14 can finish when cutting off the electricity supply.
As mentioned above, set, store correction value △ U, to corresponding to the drive current of setting tension force by the tension force setting device, carry out add operation corresponding to the electric current of described correction value △ U, and 20 outputs of the downward needle-thread tensioning control device of the new drive current that will obtain, can reduce the tension error of each time needle-thread tensioning control device tension force setting device.
Below, embodiments of the invention 2 are described.
The needle-thread tensioning control device of present embodiment is identical with the structure of Fig. 8 and Fig. 9 with solenoidal structure, so omit its explanation.In addition, the structure of control block diagram is the program difference of being implemented by CPU51, thus omit accompanying drawing, to representing with the same part use prosign of Fig. 2 and omitting to its explanation.
In described embodiment 1, when setting correction value, to import with immediate data according to operator's the correction value of obtaining of measuring in advance, in the present embodiment, when pressing, increase or reduce line tension corresponding to the button of being pressed, when measuring benchmark tension force G as the regulation button on the guidance panel 5 of tension force setting device, the operator presses register button and sets correction value, numerical value directly need not be imported like this and just can be set.
Below, with reference to the flow process of Fig. 6 present embodiment is described.At first, when startup power supply, will judge whether to select correction value to set pattern by CPU51 in step S21 similarly to Example 1.
If here be judged as certainly, just move to step S22, reference set value T is presented on the display unit that is arranged on the guidance panel 5 by CPU51, simultaneously in step S23, reference set value T is transformed into current instruction value I, and, drive needle-thread tensioning control device 20 with drive current I to D/A converter 54 outputs.At this moment, reference set value T by the CPU51 demonstration, in hypothesis benchmark needle-thread tensioning control device (for example needle-thread tensioning control device B) as predetermined benchmark, be the tension force setting value that obtains datum line tension force G, reference set value T is stored among the ROM52 that constitutes a reference value storage device in advance as the reference set value that applies datum line tension force G.
At step S24, press the setting key that is arranged on as regulation on the guidance panel 5 of tension force setting device then, and judge whether to do the setting of modified line tension force.This setting key, for example by+button and-button constitutes, whenever press+during button, to add the value of regulation now from the reference set value T of CPU51 output, when press-during button, on the contrary, deduct the value of regulation, when pressing this button, the U of setting value after changing after step S25 change is displayed on the guidance panel 5.Then, at step S26, this setting value after changing is transformed into current instruction value I and exports to D/A converter 54.In addition, when step S24 did not carry out the thread tension setting change, remaining stationary moved to step S27.
Then, in step S27, press as the registration of the regulation on the setting operation panel 5 that stores correction value operation push-button button.In addition, when not pressing the registration button, move to step S24 once more.
In above step S24～27, the operator is in the line tension of measuring the needle-thread tensioning control device 20 that is connected, and setting-out line tension force becomes G up to institute, and described setting button is operated repeatedly, on-line tension becomes after the G, carries out the setting of correction value by pressing register button.
In step S27, when pressing register button, deduct reference set value T by in step S28, pressing the setting value U that registration sets during button, calculate correction value △ U, in step S29, correction value △ U is stored in the non-momentary memory E as the correction value storage device
2On the ROM60, and the processing of pattern is set in end to correction value.
In addition, make when negating at the step S21 of startup power supply, that is, when being judged as when not being that correction value is set pattern, just move to step S30～37, become the Sewing machines pattern, this handles identical with the processing of step S7～S14 among Fig. 5, so omission is to its explanation.
As mentioned above, in the present embodiment, when the operator when measuring line tension, when change tension force setting value and mensuration line tension G, owing to only press register button and just can set correction value, so simple to operate, can't occur setting error owing to forgetting with counting loss etc., can set correction value simply.
Below, embodiment 3 is described.
The needle-thread tensioning control device of present embodiment is identical with the structure of Fig. 8 and Fig. 9 with solenoidal structure, so omit its explanation.In addition, the structure of control block diagram is owing to set correction value as analog quantity, variable resistor 59 is added in the dotted line part of Fig. 2, and be the program difference of implementing by CPU51, thus accompanying drawing omitted, to representing with the same part use prosign of Fig. 2 and omitting to its explanation.
In the present embodiment, shown in Fig. 2 dotted line part, 1 end and power Vcc (for example 5V) and another 1 end ground connection, mid point is provided with the variable resistor 59 that is connected with CPU51, the operator when measuring tension force, adjusts this variable resistor 59 to set the state that stipulated standard sets value T by the tension force setting device that is arranged on the guidance panel 5, G adjusts for the output reference line tension, sets correction value like this.
Below, with reference to the flow chart of figure 7 present embodiment is described.At first, connect power supply, in step S41, to following needle-thread tensioning control device 20 output driving command, move to step S42 then, read in by the tension force that is made of the regulation button on the guidance panel 5 and set the setting value (step S42) that button sets, this setting value is transformed into current instruction value I (step S43).
Then, in step S44, read in the voltage D that sets by variable resistor 59.This revises voltage D, when variable resistor 59 is not connected with the negative voltage shown in Fig. 2, be generally on the occasion of, because the tension force that is corrected has positive and negative any situation, the predetermined center voltage (for example 2.5V) of decision, when revising voltage D and be center voltage (2.5V), revise voltage and be 0 and do not revise, the difference of center voltage is obtained computing (step S45) as revising voltage △ U.
Then, this correction voltage △ U is transformed into correcting current command value △ I (step S46), move to S47 and carry out the computing of current instruction value I+ correcting current command value △ I, set new current instruction value I, in step S48, current instruction value I is exported to D/A converter 54, from 55 pairs of solenoid output currents of solenoid driver I.
Then, in step S49, judged whether the line tension alteration command.Setting when the thread tension setting value when usually, connecting power supply is predefined standby.The operator here operates the tension force setting device that is provided with on the guidance panel 5, the setting value of the line tension that shows on the on-line tension display unit is set at the reference set value T of regulation.Then, at this moment mensuration is descended the line tension of needle-thread tensioning control device 20 when, be that measuring basis line tension G adjusts variable resistor 59, finish the setting of correction value.Then, the operator is the tension force setting button of operation setting on guidance panel 5 once more, the setting value the when setting value of line tension shown on the line tension display unit is returned described standby.
In addition, when in step S49, not having the line tension alteration command, return step S42 and carry out the processing of step S42～S49 repeatedly.
According to above-mentioned flow process, setting is as the correction voltage △ U of correction value, to corresponding to set the drive current press key assignments tension force by tension force, carry out add operation corresponding to the electric current of described correction value, and downward needle-thread tensioning control device 20 outputs of the new drive current that will obtain, can reduce tension error corresponding to the tension force setting device of each time needle-thread tensioning control device.
In addition, above-mentioned variable resistor 59 can certainly be made of multistage rotational potentiometer etc.
More than, embodiments of the invention 1～3 are illustrated, but the present invention is not limited to the foregoing description, can do various changes for other concrete shape, structure.
For example, in the present invention, setting value and correction value by the tension force setting device is set are that tension value is directly set, but are not limited thereto, and for example, also can be set at and tension force and the irrelevant proportional suitable numerical value of tension force of electric current.
In addition, will go up the computing that adds correcting current command value △ I to drive current I and carry out, carry out computing with solenoid driver but also can computing be set externally in CPU inside.
In addition, in embodiment 2, the reference set value that is stored in a reference value storage device is stored in non-momentary memory E
2On the ROM, also can change this a reference value.
In addition, in embodiment 3, the operator sets button by tension force will set value T with manual setting, adjust variable resistor 59 then, as storing and setting value T in storage device and when selecting correction value to set pattern, the drive current of corresponding setting value T is exported to needle-thread tensioning control device.
In addition, to last needle-thread tensioning control device 10, can certainly carry out the control same with following needle-thread tensioning control device 20.
In addition, the present invention is not limited to sewing machine for binding buttonhole, can be applicable to come the various Sewing machiness of modified line tension force by having solenoidal needle-thread tensioning control device.
1 needle-thread tensioning control device according to the present invention, to needle-thread tensioning control device with the Sewing machines of electrical control line tension, setting value for the line tension of defined, usually make it produce certain line tension, can reduce corresponding between each needle-thread tensioning control device, or the error of the line tension of the setting value of line tension between each Sewing machines, can make sewing quality stable, improve repeatability.In addition, because can be as the non-momentary memory E of the storage device that stores correction value
2ROM60 takes off from the control circuit board that is loaded, so, be out of order owing to described control circuit board when exchanging, can be with described storage device from exchanging on the circuit board after preceding circuit board moves on to exchange, so just there is no need to set new correction value the retentivity when having the exchange of good circuit board.
In addition, 2 needle-thread tensioning control device according to the present invention, owing to store setting value T in advance as benchmark, the operator is change setting when carrying out line tension mensuration simply, and when the line tension G that measures as benchmark, only press register button and just can set correction value, therefore, simple to operate and can not occur setting error owing to forgetting with counting loss etc., can set correction value simply.
3 needle-thread tensioning control device according to the present invention, control device about for adding moment of electric weight than the low line tension of described define objective value to solenoid, is in service in 1 cycle of cycle operation Sewing machines, and the consumption minimum of line is controlled.Electric weight can descend greatly when the consumption line was many, at this moment, the variation of line tension might influence the degree of tightness of line, when as the limit of interval of the present invention's 2 electric weight decline when fixing on line consumption minimum, bad influence can be prevented like this, and the line tension of regulation can be set reliably.
3 needle-thread tensioning control device according to the present invention, by described correcting device, for the setting value to regulation makes the line tension of needle-thread tensioning control device identical, and drive solenoid with the electric current that is corrected, so, can reduce the error of line tension in each needle-thread tensioning control device or the Sewing machines, make the stable and raising repeatability of sewing quality, simultaneously, described correction value setting device is made of variable resistor, and irrelevant with the storage device that is storing Sewing machines control data or program etc., even owing to the edition upgrading of control data or program etc. exchanges storage device, also there is no need to set correction value again the keeping quality when having better controlled program liter version.
Claims (3)
1. the needle-thread tensioning control device of a Sewing machines has:
Apply the line tension of Sewing machines yarn changing device,
Act on yarn changing device and make the solenoid that applies tension force on line and change,
Set described tension force the tension force setting device and
The output device of exporting to solenoid corresponding to the drive current of the tension force of setting by described setting device;
Described solenoid, when the thrust that the stroke of this solenoid movable part is made as S, movable part is made as F, is added to minor variations that electric current on the solenoid is made as C, stroke and thrust when being made as △ S, △ F respectively, C=one regularly has the specific stroke section of △ F/ △ S 0; The stroke that acts on the movable part of yarn changing device is set on the described specific stroke section, and control can be changed the tension force that applies on line by the impressed current of described output device to described solenoid output, it is characterized in that,
Also have: set the correction value setting device of revising described drive current correction value, with the correction value storage device that stores described correction value, with corresponding to described drive current, will carry out add operation corresponding to the electric current that is stored in the described correction value in the described storage device, and resulting new drive current exported from described output device, revise the correcting device of described tension force.
2. the needle-thread tensioning control device of Sewing machines according to claim 1, it is characterized in that, the setting device of described correction value has: store corresponding to the difference of a reference value storage device of the reference set value of regulation line tension and the regulation setting value that will be set by described tension force setting device and described reference set value and be stored in operating means in the described correction value storage device as described correction value.
3. the needle-thread tensioning control device of a Sewing machines has:
Apply the line tension of Sewing machines yarn changing device,
Act on yarn changing device and make the solenoid that applies tension force on line and change,
Set described tension force the tension force setting device and
The output device of exporting to solenoid corresponding to the drive current of the tension force of setting by described setting device;
Described solenoid, when the stroke of this solenoid movable part is made as S, the thrust of movable part is made as F, the electric current that is added on the solenoid is made as C, the minor variations of stroke and thrust is made as △ S respectively, in the time of △ F, C=one regularly, specific stroke section (W) with △ F/ △ S 0, act on the stroke of the movable part of yarn changing device, be set on the described specific stroke section, control is by the impressed current of described output device to described solenoid output, can change the tension force that applies on line, it is characterized in that
Also have: the correction value setting device of the correction value of revising described electric current as the analog quantity setting, with corresponding to described drive current, will carry out add operation corresponding to the electric current of described correction value, and resulting new drive current exported from described output device, revise the correcting device of described tension force.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP306957/2000 | 2000-10-06 | ||
| JP2000306957A JP2002113274A (en) | 2000-10-06 | 2000-10-06 | Thread tension device of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1348027A true CN1348027A (en) | 2002-05-08 |
| CN1321236C CN1321236C (en) | 2007-06-13 |
Family
ID=18787543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011360879A Expired - Fee Related CN1321236C (en) | 2000-10-06 | 2001-10-08 | Needle-thread tensioning control device for sewing machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2002113274A (en) |
| CN (1) | CN1321236C (en) |
| DE (1) | DE10149075B4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541158A (en) * | 2013-11-06 | 2014-01-29 | 绵阳市维博电子有限责任公司 | Facial line tension detection control method and device of round buttonhole keyhole machine |
| CN109137285A (en) * | 2017-06-28 | 2019-01-04 | 兄弟工业株式会社 | Sewing machine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003230784A (en) * | 2002-02-13 | 2003-08-19 | Juki Corp | Sewing machine main body |
| JP5174414B2 (en) * | 2007-10-05 | 2013-04-03 | Ｊｕｋｉ株式会社 | Sewing thread tension control device |
| JP2010179013A (en) * | 2009-02-09 | 2010-08-19 | Juki Corp | Bobbin thread tension control equipment of sewing machine |
| JP2017113205A (en) * | 2015-12-23 | 2017-06-29 | ブラザー工業株式会社 | sewing machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4036964B2 (en) * | 1998-05-22 | 2008-01-23 | Ｊｕｋｉ株式会社 | Sewing thread tension device |
| JP4046431B2 (en) * | 1999-01-18 | 2008-02-13 | Ｊｕｋｉ株式会社 | Sewing thread tension device |
| DE19912291C1 (en) * | 1999-03-19 | 2000-07-13 | Duerkopp Adler Ag | Upper thread feed for a buttonhole sewing machine has a cam to tense and release the upper thread in a simple mechanism for alternate single and double chain stitching |
-
2000
- 2000-10-06 JP JP2000306957A patent/JP2002113274A/en active Pending
-
2001
- 2001-10-05 DE DE2001149075 patent/DE10149075B4/en not_active Expired - Fee Related
- 2001-10-08 CN CNB011360879A patent/CN1321236C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541158A (en) * | 2013-11-06 | 2014-01-29 | 绵阳市维博电子有限责任公司 | Facial line tension detection control method and device of round buttonhole keyhole machine |
| CN103541158B (en) * | 2013-11-06 | 2015-11-18 | 绵阳市维博电子有限责任公司 | A kind of circle button-holing machine tension force of facial suture detection control method and device |
| CN109137285A (en) * | 2017-06-28 | 2019-01-04 | 兄弟工业株式会社 | Sewing machine |
| CN109137285B (en) * | 2017-06-28 | 2021-04-02 | 兄弟工业株式会社 | Sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10149075A1 (en) | 2002-10-17 |
| JP2002113274A (en) | 2002-04-16 |
| CN1321236C (en) | 2007-06-13 |
| DE10149075B4 (en) | 2007-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101240387B1 (en) | Device for detecting changes of fabric thickness of sewing machine | |
| US5660129A (en) | Sewing machine | |
| CN1348027A (en) | Needle-thread tensioning control device for sewing machine | |
| US4873931A (en) | Programmed thread regulating apparatus for a sewing machine | |
| CN1138029C (en) | Sewing machine thread regulator controlled by solenoid valve | |
| CN1496773A (en) | Conducting wire discharge equipment | |
| CN1113997C (en) | Thread tensioner of sewing machine | |
| CN101063258A (en) | Thread tension device for sewing machine | |
| CN1478936A (en) | Control device of sewing machine and its control method of sewing machine | |
| US5229949A (en) | Sewing management system for a plurality of sewing machines | |
| CN1438376A (en) | Thread-tension adjusting device of sewing machine | |
| CN101302685A (en) | Automatic sewing machine | |
| JPH0249688A (en) | Thread tension adjuster of sewing machine | |
| JP4036964B2 (en) | Sewing thread tension device | |
| CN1701448A (en) | LED drive device and LED drive method | |
| CN1463074A (en) | Motor driver and registering instrument including same | |
| JPH02262925A (en) | Caulking working device | |
| CN1132433C (en) | External magnetic field compensation arrangement, and cathode ray tube displaying device | |
| CN218308947U (en) | Tiltable rotary manipulator glue dispenser | |
| CN216639870U (en) | Sewing machine | |
| JPH0538705Y2 (en) | ||
| JP2547452B2 (en) | Position control device for industrial sewing machines | |
| JP3602915B2 (en) | sewing machine | |
| JP2003033589A (en) | Multi-needle embroidering machine | |
| JP2007289349A (en) | Embroidery method for embroidery pattern to swollen part of cloth surface and embroidery object |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070613 Termination date: 20101008 |