CN1105722A - Needle trail forming machine with thread cleaning device - Google Patents

Abstract

A stitch-making machine with an adjusting device for the position of the range of movement of a pressure foot movable back and forth relative to a workpiece, and with a thread-wiping device, is to be designed in such a way that the thread wiper can be set in motion, without the need for a specific drive, in relation to a predeterminable position of the pressure foot. For this purpose, the thread wiper is arranged so as to be relatively movable in relation to the pressure foot. The movements of the thread wiper can be derived from a drive of the adjusting device, a first phase of movement of the drive serving for adjusting the position of the range of movement of the pressure foot and a second phase of movement of the drive serving for moving the thread wiper.

Description

Needle trail forming machine with thread cleaning device

In DE2938894C2, disclose a machine that forms needle tracking have one be used for the relative labor and materials of eccentric swage do toward and return the adjusting device of position of the range of movement of motion.This eccentric swage for example after the process of a cut-out line material, can be recommended on the position that is called stop position after at the end that forms the needle tracking process.This position be in its toward and return when motion return position, accessible top above.

This eccentric swage can center on a bearing position revolution that become laterally arrangement with formation needle tracking position, and its base plate can move along a circular trace when one of importing is moved like this.According to this, on eccentric swage, in case when between itself and needle tracking position, having a displacement then can act on the component motion of a level, this component motion can prevent skidding off of needlework being provided with on the eccentric swage under the corresponding line guiding device situation, and after a line cutting-off process, just can realize the line end head height is moved on the position that is positioned at needle tracking position top.

The line guiding device that is provided with on eccentric swage owing to its maintenance performance to needlework, will play the effect of the device of clean line during eccentric swage upwards is turned back to its stop position after a line cutting-off process.Height by the caused needlework of device stated draws effect, because this is that only the horizontal motion components by eccentric swage causes in passing, so depend on the maximum shift of its relative needle tracking position.This displacement, in according to above-mentioned patent documentation around one with the needle tracking position laterally the bearing position of arrangement can rotating eccentric swage situation under, certainly many times than the amount of exercise of vertical direction is little, so exist the danger that needlework can not be pulled out fully from labor and materials.

Also disclose a machine that forms needle tracking by DE-OS2813392 it has a line that is used for needlework of installing and wipes on eccentric swage.Also fixing one on this external eccentric swage, to be used for its structure that line wipes be the drive unit of pressure medium working cylinder, the rocking bar that its piston rod works by a deflecting element of wiping as line and wipe with line and to be abutted against.

These needlework are cut off in the bottom side of labor and materials by a cutter sweep.For moving the line end head height to one on the position of settling above the needle tracking position, this line is wiped the extension area that moves to needlework by the pressure medium working cylinder.And after needlework are held, be pulled back down to its home position by a Return spring with the corresponding setting of pressure medium working cylinder.And the cut-out work of needlework can draw as the height of line end head equally, not only under the eccentric swage situation of holding high from labor and materials but also after eccentric swage is placed on the labor and materials, can both carry out.

Online if desired wiping is carried out before the work eccentric swage being lifted, and just must in turn the drive unit and the pressure medium working cylinder that are used for eccentric swage be connected.After clean toe-in bundle, the drive unit that is used for eccentric swage also must be connected so that make its decline again.

Task of the present invention is, the line that a form like this is set on the machine of the formation needle tracking of a above-mentioned type is wiped device, that is, line is wiped and can be moved on the aligned position of a predetermined relative eccentric swage under the drive unit situation that needn't add.

This task is that the scheme by claim 1 characteristic solves.

This adjusting device is provided with for the position of adjustment movement scope, in this scope, eccentric swage can be done upper and lower motion between return position, a top and the return position of bottom, eccentric swage rises from labor and materials during on top return position, and when the return position of bottom, the extruding force that it can be scheduled to is placed on the labor and materials.Simultaneously, line is wiped device and is used for after a needlework cutting-off process, and the downside of line end head from labor and materials is pulled upwardly and therefore can avoids inweaving in the seam of back.In the motion that the driving effect lead-in wire of adjusting device is wiped, two alleged on the machine that forms needle tracking performances (position adjustments of the range of movement that eccentric swage and line are wiped) are only realized like this with a drive unit, technical fee can reduce to minimum on the one hand, clean on the other hand line effect needn't just can be finished according to the position adjustments of eccentric swage range of movement by the application controls device, according to this, eccentric swage always remains on its best position when clean line.For guaranteeing this advantage, be that jockey so is set between the drive unit of anchoring and adjusting device, that is, the motion of drive unit is not delivered to line and smears in adjustment process, wipes after a line cutting process and just takes place should be driven the time but have only when line.This point for example can so realize, promptly between drive unit and line wiping, use under the transfer device situation, but the motion of drive unit can be continued conduction as the clutch of what a folding or a transmission device smears to line, at this moment, by correspondingly regulating this adjusting device so that eccentric swage has the position that it is provided with for clean line.

Wipe the synergy that form like this can be arranged with adjusting device for line, just essential drive unit, it at first rises on the predetermined holding position eccentric swage in one first motion stage and by an adjustment process after a line cutting-off process on request, produces in second motion stage then and passes to the motion that line is wiped.

For line wiping and eccentric swage are moved back on the corresponding home position, this drive unit produces a motion that has reverse stroke and pass through two motion stages.After clean toe-in bundle, this drive unit only moves in its first motion stage, so that the position of eccentric swage range of movement adapts with corresponding labor and materials.

By structure setting that relative its movable line with of eccentric swage is wiped just can, eccentric swage vertically and so when not having horizontal direction can relative needle tracking position to move, needlework are extracted out from labor and materials after a cutting process.

Carry out structure when being provided with putting according to claim 2 pair thread cleaning with a transmission device, the motion that is produced by drive unit can in turn be delivered on the function corresponding element (eccentric swage, line is wiped).The advantage of a transmission device is herein, and it has the idle stroke district of a qualification equally according to claim 3 as adjusting device, wherein, can avoid being delivered on the function element of relative set by the motion that drive unit causes.

By driving element being installed on the compressing rod according to claim 4, it is last that this element just always remains on the distance of the relative eccentric swage that can be scheduled to, and therefore the motion of wiping for drive wire is the location independent of the range of movement when doing upper and lower moving with eccentric swage with regard to its size speech.

In claim 5, provide a solution, just can be embodied as the motion that drive wire is wiped necessary relative compressing rod in simple mode by its driving element.Only otherwise have a driving effect that line is wiped, then can guarantee the following feature of the relative eccentric swage of driving element by spring action.

In claim 7 and 8, provide the favourable structure embodiment of the present invention.The measure of claim 8 is advantageous when using the eccentric swage that relative compressing rod is movable and hookup wire is wiped especially, because this eccentric swage because line is wiped servo-actuated and can be offset on the direction of compressing rod, can not wiped contingent relative motion and causes line is wiped undesirable driving simultaneously when labor and materials thickness increases owing to the relative line of deflecting element.

Set forth the present invention by an embodiment in the accompanying drawing below.

Fig. 1 is an embroidery machine stereogram;

Fig. 2 is a material pressing device of embroidery machine, and it has an eccentric swage of settling on labor and materials and the line in inactive state is wiped;

Fig. 3 as the device of Fig. 2, but has the eccentric swage of mentioning from labor and materials and wipes at the line of run location;

Fig. 4 such as Fig. 2 or 3 device are wiped but have the line of lifting eccentric swage on the position of a top, return position, accessible top when being in needle tracking and forming and having resting position;

Fig. 5 is an enlarged drawing of eccentric swage.

Described a single head embroidery machine in Fig. 1, it has housing 1 embroidery 3 is set on its arm spare 2.This embroidery 3 has spudger 4, always with shank 5 and a material pressing device 7 of syringe needle 6.This corresponding driven shank 5 is the pin hole 8(Fig. 5 with needle plate 9) aim at.Housing 1 is installed in that one of its capacity can be at two drivable tabouret carriages 11 of mutually perpendicular direction on the support plate 10.Carriage 11 is used for wherein, clamping labor and materials 13 with the ccontaining tabouret 12 of not shown mode.

This material pressing device 7 is expressed separately in Fig. 2 to 5.In embroidery 3, settle an axle 14 that drives by the embroidery machine drive unit mode of vibration of not describing, fix a rocking bar 15 on it.This rocking bar is connected with an end of connector 18 by a connecting rod 17, and the other end is installed on the adjustment (adjusting) lever 19, and it is pivotally around a fixed axis 20, and at connector 18 hinged connecting rods 22.

Connecting rod 22 has a slotted hole 23, wherein snaps in an axle journal 24, and it constitutes on an arm spare 25, and arm spare 25 belong to one around fixed axis 27 can rotating both arms lever 28.Be provided with an axle journal 30 on another arm spare 29 of lever 28 equally, it is stuck in the fork-shaped end of a lever 32, and the other end of lever 32 is hinged on the rocking bar 33, and it is fixed on the axle 34 that links to each other with not shown drive unit.The axle journal 30 of this lever 28 is stuck on the axle journal 30 by its end of a tension spring 35(, and the other end is installed on the rocking bar 33) and maintenance rests on the fork-shaped end base portion of lever 32.

Lever 28 is connected with a fixture block 39 fixing on compressing rod 38 by a connecting rod 37 of installing at arm spare 29 free ends.

Compressing rod 38 is for a ccontaining press-on pins 40, and the end constitutes a head 41 thereon, and it has a diameter bigger than bar 42.Be shaped on a nose 43 on head 41, it stretches out by a vertically extending slot 43 of compressing rod 38 wall portions.The bottom side of this head 41 is used for by putting a spring 45, and by it, this press-on pins 40 is bearing on the lining 47, and lining 47 is to be fixed on the bottom of compressing rod 38.

On the following end of compressing rod 38, amplify diagram as Fig. 5, fix a retainer 48, a hinged rocking bar 50 on it with torsionspring 49 supportings, and be shaped on one part 51.This rocking bar 50 is at the hinged eccentric swage 52 that is equipped with of its free end.This eccentric swage 52 has a vertically extending slotted hole 53, wherein snaps in an axle journal 54 that is provided with in the lower end of a part 51 and is used to guide eccentric swage 52.

On eccentric swage 52, settle a line to wipe 55 rotationally.This line is wiped 55 and is had a bottom 57 towards eccentric swage 52 and remove the line receiver 58 that extends, its free end and that side facing to needlework be fork-shaped open wide to be used to admit needlework.And a side opposed in contrast and that be provided with as shackle 59 on the line receiver 58, when clean line be as needlework by putting the face effect.

It is that an arm spare 61 by two arm deflecting elements 62 heads in bottom that line wipes 55.Another arm spare 63 of deflecting element 62 leans against on the bottom side of bar 42, and bar 42 belongs to the press-on pins 40 of stretching out from compressing rod 38.

In the position of the compressing rod shown in Fig. 2 and 3 38, the nose 44 of press-on pins 40 is in the sphere of action of lever 65 cams 64, and lever 65 can and be connected with adjustment (adjusting) lever 19 by a connecting rod 67 around a fixed axis rotation.Adjustment (adjusting) lever 19 is connected with an end of lever 70 by a connecting rod 68, and lever 70 is placed on the fixed axis 69.The opposite ends of this lever 70 is connected with a ratch 72, and ratch 72 is meshed with a gear 73 and is bearing on the top wheel 76, and gear 73 is fixed on the axle 74 of a motor 75.

By element 68 and 70 and 72 to 76, constitute a drive unit 78, it is used for one and comprises element 18,19, and 22 to 29 and 37 adjusting device 79, this adjusting device 79 are used for the position of the moving region of eccentric swage 52 with respect to labor and materials 13.This adjusting device 79 by one on adjustment (adjusting) lever 19 by put with by element 40 with 64 to 67 transmission devices that constitute 80 and be used for line and wipe 55 deflecting element 62 and be connected mutually.Just constitute the device 81 of a clean line with deflecting element 62 and transmission device 80 by line wiping 55.

The operation principle of this material pressing device 7 is as follows:

Before the embroidery process, in case labor and materials 13 are tensioned in tabouret 12, this drive unit 78 is given the direction of choosing according to it and is had one with a switch of not describing and can be connected by the actuating quantity that the switching manipulation time limit is determined by operating personnel.By the rotation of gear 73 fixing on 75 74 in motor, then ratch 72 does flatly to move and cause thus the gyration of lever 70 around its fixed axis 69.This gyration then is delivered on the adjustment (adjusting) lever 19 and from then on by connecting rod 68 and is delivered on the connector 18 again.This connector 18 causes the gyration of a relative connecting rod 17 thus, and its (18) makes connecting rod 22 continue directly to transmit motion and transmit a gyration thus to lever 28 towards compressing rod 38 motions or by connecting rod 22 according to the action direction of drive unit simultaneously.This axle journal 24 just is held the lever side end that rests on slotted hole 24 in Fig. 2 and 3 by torque (it is because the tension spring of installing 35 is delivered to the moment on the lever 28) on lever 28 axle journals 30 between this moving period.

Be connected with drive unit 78 like this, as long as the ratch 72 of drive unit 78 shows to left movement as Fig. 2, so, lever 28 just rotate with counter-clockwise direction and by connecting rod 37 with a movement guide to compressing rod 38, by this motion, this compressing rod 38 just is raised from labor and materials 13 and relative its position at that time.Simultaneously, by adjustment (adjusting) lever 19, (it is the member that transmits motion to the adjusting device 79 of lever 28), connecting rod 67 just towards compressing rod 38 motions, according to this, just imports a gyration towards press-on pins 40 directions on lever 65.In the end position of compressing rod 38 tops, at this moment, compressing rod 38 can lift by adjusting device 79 the biglyyest, and then the teat 64 of lever 65 does not still have power to be applied on the press-on pins just by on the nose 44 of putting press-on pins 40.On the contrary, ratch 72 motion to the right by drive unit 78, then lever 28 is with clockwise revolution, and connecting rod 67 leaves the motion of compressing rod 38, like this, this compressing rod 38 with respect to its at that time the position and descend, and the teat 64 of lever 65 is done the rotation that the nose 44 of relative pressure pin 40 leaves.

By drive unit 78, at last by adjusting device 79, the position of compressing rod 38 just can have been regulated with the position of eccentric swage 52 relative labor and materials 13 according to this, therefore, the position of the range of movement of eccentric swage 52 just can be adapted to labor and materials thickness best, wherein, in the range of movement of eccentric swage, eccentric swage 52 is forming during the embroidery process under the needle tracking situation and do rising and descending motion between a return position, a top (this moment eccentric swage from the labor and materials from) and a bottom return position (at this moment, eccentric swage is placed on the labor and materials).

Making the driving effect of eccentric swage 52 motions when forming needle tracking, be in now under static drive unit 78 situations, is to realize by the embroidery machine drive unit do not described and by axle 14, and this 14 moves around its shaft vibration mode at this moment.This moves through rocking bar 15 and connecting rod 17 passes on the connector 18 and from passing through connecting rod 22 here, lever 28 and connecting rod 37 are delivered on the compressing rod 38.By compressing rod 38, this eccentric swage 52 is done to rise according to the motor coordination relation of relative shank 5 and is descended the ground motion.

At the end of an embroidery process, eccentric swage 52 remains on the return position of its bottom, needlework and one in Fig. 5 for see clearly better the wire loop line do not described then with one needle plate 9 following arrangements but the line do not described lancinates disconnected.Under cutting process end situation, this drive unit both can be operated personnel by the control to Sewing machines, also can control according to first motion stage by the unshowned switch that operation had been carried, like this, motor 75 rotates the revolution that can be scheduled to gear 73 by a direction, on this direction, ratch 72 is moved to the left according to Fig. 2.In this motion, compressing rod 38 at first is thus lifted to the terminal location of its top, and lever 65 is brought on the nose 44 that rests on press-on pins 40 with its teat 64 simultaneously.When the ratch 72 by drive unit 78 continues to move to position shown in Figure 3 left, the gyration of lever 65, just proceed with identical direction in second motion stage neutralization of drive unit 78, the result applies an active force by the teat 64 of lever 65 on the nose 44 of press-on pins 40, thus, press-on pins 40 effect that will overcome spring 45 is moved towards the direction of eccentric swage 52.Because the bottom side of press-on pins 40 bars 42 rests on the arm spare 63 of deflecting element 62, so this deflecting element 62 is just by the moving downward by counterclockwise rotating of press-on pins 40, and by its another arm spare 61 gyrations of guiding and be similarly and pass to line widdershins and wipe on 55.Under the gyration situation of online wiping 55, needlework (its operation is shown as Fig. 5) just by put that line is wiped on 55 line receiver 58 shackles 59 and since line wiping 55 continue to be turned back to its terminal location shown in Figure 3, then when doing this motion with the component motion of the vertical effect of pin 6 longitudinal axis with needlework from the pin hole 8 of needle plate 9, pull out in the labor and materials 13 with in bottom 57 pin holes of eccentric swage 52.In the terminal location of online wiping 55, the line end head of needlework is positioned at labor and materials 13 tops and uses shown in the chain-dotted line as Fig. 5.

After clean toe-in bundle, the ratch 72 of drive unit 78 so carries out the motion of first motion stage again to the right, though promptly the power that is applied on the press-on pins 40 of the teat 64 by lever 65 is eliminated, and press-on pins 40 can be got back to its home position under the effect of spring 45, but teat 64 continues to rest on the nose 44 of press-on pins 40.This line is wiped 55 and can therefore be turned back on its position of describing with fine line in Fig. 5.

In order to take out tabouret 12 to change labor and materials 13, this eccentric swage 52 is the terminal location on limit from it, (at this moment, the clean work of line has been implemented) and by on lift on the position of top more, after this be referred to as stop position.For this reason, the axle 34 by its unshowned drive unit by rotating counterclockwise.This moves through rocking bar 33 and lever 32 and is passed on the lever 28, and lever 28 is by the rotation direction rotation of axle 34.Under this gyration situation, the arm spare 29 of lever 28 upwards spurs compressing rod 38 by connecting rod 37, because, adjusting device 79 remains static when lever 28 is done this motion by drive unit 78, so the axle journal 24 on the arm spare 25 of lever 28 just is pulled to the opposite ends of slotted hole 23 on the connecting rod 22.This lever 28 just is on the position that Fig. 4 represents then.

By press-on pins 40 is set in compressing rod 38, then compressing rod 38 just can be held high on the stop position.Therefore the nose 44 of press-on pins 40 is positioned at the top of teat 64 zones of action of lever 65.Just can avoid undesirable disconnection in the clean process of line according to this.

After thorn tabouret 12 is changed, rocking bar 33 and therefore lever 32 all get back to the home position, and the ratch 72 of drive unit 78 just moves to a position at first motion stage and by the mode of having stated, at this moment, just in time corresponding to eccentric swage 52 in its range of movement and on the position that adapts of labor and materials thickness.In case eccentric swage 52 is in it when the return position of the accessible bottom in this position, the embroidery process just can begin.

Claims (7)

1, form the machine of needle tracking, have the adjusting device of the location of a range of movement that is used for eccentric swage, this eccentric swage relatively labor and materials do toward with return motion, also have a device that is used for clean line, it is characterized in that:

It is that relative eccentric swage (52) can move and settles that this line is wiped, and the motion that line is wiped is to import from the drive unit (78) of adjusting device (79), simultaneously, first motion stage of drive unit (78) is the position that is used to regulate the range of movement of eccentric swage (52), and second motion stage of drive unit (78) only is used for portable cord and wipes (55).

2, by the described machine of claim 1, it is characterized in that:

The device (81) that is used for clean line has a transmission device (80) that is abutted against on adjusting device (79), by it, a motion can be led line and wipe on (55) in second motion stage of drive unit (78).

3, by claim 1 or 2 described machines, it is characterized in that:

Not only adjusting device (79) but also transmission device (80) all have an idle stroke scope, in this scope, can avoid being delivered to (eccentric swage 52 on the function element that connects after corresponding by the motion that drive unit (78) produces; Line wipes 55).

4, by claim 1 or 2 described machines, it is characterized in that:

Wiping the element (press-on pins 40) that (55) are in the transmission device (80) that is abutted against with line for one, is that the motion mode that can follow compressing rod (38) is installed on the compressing rod (38).

5, by claim 1 and 4 described machines, it is characterized in that:

Driving element (40) is movable leading at relative this compressing rod of bearing of trend of compressing rod (38), and can remain on one to the predetermined relative location of eccentric swage (52) under a spring (45) effect.

6, by claim 1 and 4 or 5 described machines, have a movable line of relative eccentric swage and wipe deflecting element, it is characterized in that:

The drive unit (78) of adjusting device (79) can take to deflecting element (62) by driving element (40) and be abutted against mutually.

7, by claim 1 and 6 described machines, it is characterized in that:

Deflecting element (62) is abutted against line in bottom and wipes facing toward on the side of eccentric swage (52) base plate (57) of (55).

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