CN1215104A

CN1215104A - Fastener sewing machine

Info

Publication number: CN1215104A
Application number: CN 98121379
Authority: CN
Inventors: 宫地信次; 宫地康次
Original assignee: Hams K K
Current assignee: Hams K K
Priority date: 1997-10-16
Filing date: 1998-10-16
Publication date: 1999-04-28
Anticipated expiration: 2018-10-16
Also published as: JPH11114253A; HK1019623A1; JP3038576B2; CH693958A5; CN1095893C

Abstract

A fastener sewing machine enables automatically stitch a fastener to a length of weft band at predetermined intervals, meanwhile the weft band is sent along a direction and pass a sewing position , said sewing machine includes: a shaft beam for driving a needle vertically; a fastener feeding mechanism comprising a cam shaft and a first and a second feeding cam mounted on thereof for feeding a fastener to a sewing position successively; and a driving motor which rotation of the cam shaft is independently rotated to rotation of the shaft beam.

Description

Fastener sewing machine

The present invention relates generally to a Sewing machines, especially, but not exclusively, relate to a class Sewing machines, when one section belt during along the sewing workstation of a direction by this class Sewing machines, Sewing machines automatically is sewn into fastener (buttonhole or the clasp that is mated) on this section belt with a predetermined interval.

As everybody knows, most of clothes that people wore such as trousers, skirt, suit, brassiere or the like, use one at least by buttonhole and the fastener formed with the coupling clasp that this buttonhole fastens, so that a garment pieces of separating is snapped together.Certainly, buttonhole and coupling clasp are sewn onto on separately the garment pieces, for example the opposite end of skirt or pants waistband.

For buttonhole and clasp are fixed on the clothes of an appointment, dress manufacturer adopts two kinds of elongated fastener textile carriers, a compartment of terrain on it is sewed with buttonhole, be sewed with clasp with same interval on another its, so that the fastener carrier can be cut into buttonhole and clasp carrier smallclothes, be sewn onto subsequently on the clothes, for example on the opposite end of skirt waistband.

The invention particularly relates to the Sewing machines that elongated textile carrier can effectively be provided, be sewed with a plurality of fasteners that separate with predetermined space on the carrier, below this class Sewing machines of being well known in the art earlier in conjunction with Fig. 7 discussion.

Sewing machines with 80 prior aries of representing among the figure consists essentially of: one can fold the folding guide 45 of one section webbing T, when this section webbing T extracts take-up roller R out, make the opposite end of this webbing, promptly first and second lateral edge portions overlap each other basically; The one feeding roller mechanism 50 by pulse motor 51 drivings sent a sewing workstation 82 off and on one section webbing; One fastener supply mechanism 35 comprises the baffle plate 41 that clasp H or buttonhole E one by one is fed to successively sewing workstation 82 from fastener pay-off 43; With a single needle sewing mechanism 80, comprise that a pin 83 and is sewn into pin swing mechanism 85 (needle rocking mechanism) on one section webbing T on the sewing workstation 82 successively with clasp H or buttonhole E.

In example shown in Figure 7, that be used for Sewing machines is buttonhole E, can certainly be clasp, but at every turn can only be with among clasp H and the buttonhole E a kind of, need change fastener supply mechanism 35 and pay-off 43 when using clasp H or buttonhole E.

When the Sewing machines 80 with prior art shown in Figure 7 is sewn into buttonhole E on one section webbing T successively, the effect of feeding roller mechanism 50 that at first will be by being positioned at after 80s of Sewing machines (or on the left side) as shown in Figure 7, T pulls out from take-up roller R with this section webbing, afterwards by folding guide 45.When this section webbing T along sending the band direction when sending into shown in the arrow Q, folding guide 45 work, the first and second relative lateral edge portions of folding fabric band T inwardly gradually, so that an imbricate is on another edge, only be folded in the first side edge part on the second side edge part of webbing T then inwardly, make it between as shown in figure 16 second side edge part and first side edge remainder.

Sewing machines 80 work subsequently is to be supplied to sewing workstation with nethermost one in the heap of the buttonhole E in the pay-off 43, in the gap that the buttonhole E that is supplied on the sewing workstation is limited between two folded edges that overlap on another at fabric band T as shown in figure 16, the work of pin swing mechanism 85 is that buttonhole E is sewn on the fabric band T.

When requiring clasp H is sewn into fabric band T and goes up, supply clasp H successively by the fastener supply mechanism on sewing workstation 35 as shown in figure 14 similarly, being turned up the soil at interval by Sewing machines 80 subsequently is sewn on the fabric band T.

But the prior art Sewing machines 80 of said structure has following problem:

A) in this known Sewing machines 80, it is to comprise that by one the drive system of a worm screw 88 and worm gear 89 is driven with the camshaft 25 of driving needle swing mechanism 85 and the supplying

cams

36 and 37 of two driving fastener supply mechanisms 35 that the armshaft 87, of the Sewing machines 80 of a driving needle 83 rotates needle swing cam 32.Therefore, when

cam

32,36 and 37 structure is at those cams 32, in 36 and 37 the complete rotation process, according to such patterns for sewing shown in Figure 9, cooperation by feeding roller mechanism 50, when a buttonhole E is sewn on the fabric band T, then with adopting so cam 32 of structure, 36 and 37 Sewing machines, if the spacing that is sewn between the adjacent buttonhole E on the fabric band T will change, for example from 19.1 millimeters (normal pitches) shown in Figure 10 to 12.7 millimeters (little spacings) shown in Figure 11, just require the straight partial L (being a part of fabric band T between first seam pin shown in Figure 9 or suture needle (stitch) the 1 to the 15 seam pin 15) of the fabric band T between the adjacent buttonhole E to shorten.In other words, in straight partial L sewing process, the amount of sending into (sending into size) of the fabric band T that is sent into by feeding roller mechanism 50 when each Sewing machines 80 is finished a sewing action must reduce.

This means that the sewing number of times of being about to finish is greater than gives the needed number of times of set a distance on fabric band T, therefore, final patterns for sewing will comprise the seam pin that should not form, thereby cause the decline of productivity.

Also have, when the spacing between the buttonhole E that will sew wishes that when 19.1 millimeters standard values shown in Figure 10 were increased to 25.4 millimeters (big spacing), the straight partial L of the fabric band T between the adjacent buttonhole E is essential to be increased.This means the essential prolongation of sewing spacing, the final so disappointing sewing efficiency that causes the fabric smallclothes to be separated from each other easily.

B) for the seam pin quantity between the adjacent buttonhole E is changed over a suitable value, will change worm screw 88, worm gear 89 and supplying cam 36 and 37.

Parts

88,89,36 and 37 this replacing need to remove and join armshaft 87, camshaft 25 and the parts relevant with them with refilling, and have wasted the time like this, make production process complicated and cause higher cost.For this reason, up to now, this work that changes seam pin quantity never solves, and this just forces dress manufacturer to use the Sewing machines of the seam pin that can only form constant predetermined quantity.

Therefore, the present invention has designed the Sewing machines that can eliminate the problems referred to above basically, promptly provide a kind of through improved Sewing machines, the number that wherein is formed on the seam pin on that part between adjacent two fasteners that are sewn onto on the fabric band of fabric band can change as required, thereby obtains with the isolated final seam pin of preset space length.

For this reason, one aspect of the present invention provides a fastener sewing machine, when fabric band is sent to and when the sewing workstation along a direction.It can be sewn onto fastener on one section webbing with a preset space length successively, and this Sewing machines comprises: the armshaft that a driving needle moves up and down; One fastener supply mechanism comprises a camshaft and first and second supplying cams that are installed on the camshaft, so that successively fastener is fed to sewing workstation singly; An and drive motor that is independent of armshaft ground drive cam shaft.

Drive motor preferably includes a pulse motor or a servomotor.

Another aspect of the present invention provides a fastener sewing machine, and it comprises: the armshaft that a driving needle moves up and down, this armshaft have a worm screw mounted thereto, rotate so that can be independent of armshaft; One fastener supply mechanism comprises a camshaft and first and second supplying cams that are installed on the camshaft, so that successively fastener is fed to sewing workstation singly, wherein camshaft has worm gear mounted thereto, therewith rotates; A drive motor and comprise that first and second take turns the driving transmission system of part.First round part links to each other with worm screw and rotates, and second take turns component and link to each other with drive motor.This driving transmission system can be delivered to camshaft with the driving force of drive motor, to be independent of armshaft ground drive cam shaft.

First and second to take turns part can be respectively driven gear and driving gear, maybe can be respectively by movable strap disc and belt pulley initiatively.Take turns component and adopt passive and initiatively during belt pulley when first and second, drive transmission system and comprise that also one is connected in the synchronous belt between passive and the active belt pulley.

Above and other objects of the present invention and feature, the description of following a preferred embodiment of the present invention in conjunction with the drawings will seem more clear, all identical parts all use identical numbering to represent in the accompanying drawing, wherein:

Fig. 1 is a schematic stereogram, and it shows the pith of implementing a fastener sewing machine of the present invention;

Fig. 2 is a calcspar, and it shows the electric control circuit that fastener sewing machine adopted shown in Figure 1;

Fig. 3 is a front view, and it shows a camshaft drive that changes to some extent that can be used for Sewing machines of the present invention;

Fig. 4 one is similar to the view of Fig. 3, and it shows another camshaft drive through changing;

Fig. 5 is the partial top view of one section webbing, and it shows with fastener sewing machine of the present invention and alternately is sewn into fastener buttonhole on the webbing with little and normal pitch;

Fig. 6 is the partial top view of one section webbing, and it shows with fastener sewing machine of the present invention and alternately is sewn into fastener buttonhole on the webbing with standard and big spacing;

Fig. 7 is a schematic stereogram, and it shows the fastener sewing machine of a prior art;

Fig. 8 one is used in the front view of one in prior art fastener sewing machine feeding roller mechanism;

Fig. 9 is a schematic diagram, and it shows sewing needle is how to make buttonhole;

Figure 10 is the partial top view of one section webbing, and wherein, the fastener buttonhole is made on this webbing with the normal pitch of style shown in Figure 9;

Figure 11 is the partial top view of one section webbing, and wherein, the fastener buttonhole is made on this webbing with the little spacing of style shown in Figure 9;

Figure 12 is the partial top view of one section webbing, and wherein, the fastener buttonhole is made on this webbing with the big spacing of style shown in Figure 9;

Figure 13 is the partial top view of one section webbing, and it shows with regular spaces and makes thereon fastener clasp;

Figure 14 is a schematic cutaway view along the line A-A of Figure 13 intercepting;

Figure 15 is the partial top view of one section webbing, and it shows with regular spaces and makes thereon fastener buttonhole; And

Figure 16 is the schematic cutaway view along the line B-B intercepting of Figure 15.

The application is based on 9-321894 number application in Japan's application on October 16th, 1997, and its content is here cited with for referencial use.

At first consult Fig. 1, fastener sewing machine of the present invention is like this design: the one section webbing T that extracts out along the direction shown in the arrow Q from webbing winding up roller R is by a sewing workstation 82, fastener with the preset space length automatic sewing to this fabric band T.

Above-mentioned fastener can be buttonhole E shown in Fig. 5,6,10 to 12 and 15 or clasp H shown in Figure 13.Specifically, though in an illustrated embodiment, shown fastener has two anchor holes, but as long as fastener has an anchor hole at least, no matter the crochet line can pass this anchor hole will be that buttonhole E or the fastener of clasp H are fixed on the flaky material such as fabric band T, can adopt the present invention.

Be one to adopt single suture needle and the Sewing machines of the Z-shaped stitching that is designed to sew with having shown in the chain-dotted line 80 with the internal part shown in the solid line among Fig. 1.The Z-shaped chain stitch sewing machine of this single needle (single-needle zigzagstitching machine) 80 can be any known structure, and it comprises that a pin crank mechanism 84, can be around horizontal armshaft 87 and the pin swing mechanism 85 of longitudinal axis rotation to move up and down by pin crank mechanism driving needle 83 of oneself.Pin swing mechanism 85 comprises that one has the camshaft 25 of a needle swing cam 32.Needle swing cam 32 is installed on the camshaft 25 so that rotate together, and with a horizon bar 86 interlocks, with swing or wave pin 83.

Camshaft 25 can be rotatably set in be generally arm axle 87 pars intermedias below, make it be substantially perpendicular to arm axle 87 and extend.Camshaft 25 has a front end, the bigger synchronous belt dish 26 of one diameter is installed on the front end, they are rotated together, this belt pulley 26 links to each other through the less synchronous belt dish 28 of a transmission and a diameter by a synchronous or toothed belt again, and synchronous belt dish 28 with by 29 of bearing supports regularly the power transmission shaft of the servomotors 30 of supporting link to each other, the chain-dotted line among the figure only shows the part of this bearing support 29.Therefore, but servomotor 30 comprises

synchronous belt dish

26 and 28 and the driving force transmission system drive cam shaft 25 that is installed in the synchronous belt 27 between

belt pulley

26 and 28 by one, and its is rotated around the longitudinal axis of oneself.

It is to be noted, on the circumference of major diameter synchronous belt dish 26 equally spaced tooth is arranged, many several times (or the diameter of major diameter synchronous belt dish 26 is than big several times of minor diameter synchronous belt dish 28) of the minor diameter synchronous belt dish 28 of gear ratio and servomotor 30 tight connection, therefore, any degree that may can be reduced to minimum by the influence that backlash causes to camshaft 25.Also have, the servomotor 30 that is adopted is those class motor of can be enough quite low torque actuated camshaft 25.

Camshaft 25 has a needle swing cam 32 and first and second supplying

cams

36 and 37 that all are fixedly mounted on it, and they are rotated together.On the surface of needle swing cam 32 cam path (cannot see among the figure) is arranged, be used to control pin swing mechanism 85.Similarly, cam path is separately arranged respectively also on supplying

cam

36 and 37 the surface, be used to control fastener supply mechanism 35, constantly to supply fastener, i.e. buttonhole E or clasp H, this will describe after a while.

Needle swing cam 32 has a cam roller that engages with cam path slidably, and this cam roller can link to each other with horizon bar 86 by a leverage 34 of being made by a rocking bar, a connecting rod and a male part with moving.This horizon bar 86 moves under the control of needle swing cam 32, with the pin swing mechanism 84 that promotes to link to each other with the front end of horizon bar 86 by transmission along a horizontal direction, pin 83 is swung along the feeding direction Q that is substantially perpendicular to fabric band T, make when fabric band T when direction Q sends to and pass through sewing workstation 82, be essentially Z-shaped form with one and be sewn.

Numbering 40 expression one among the figure is installed in the slide bar on the frame adjacent with sewing workstation 82, this slide bar moves back and forth on first and second directions that are perpendicular to one another, first direction is to be arranged essentially parallel to arm axle 87 and perpendicular to the direction of webbing feeding direction Q, and second direction is and the consistent direction of webbing feeding direction Q.This slide bar 40 links to each other with 37 with first and second supplying cams 36 through transmission with 39 by leverage 38 separately, and each leverage is made with cam roller, a rocking bar, a connecting rod and a male part of cam path joint in corresponding supplying

cam

36 or 37 slidably by one.Specifically, first supplying cam 36 links to each other with slide bar 40 by transmission and controls it, so that make the slide bar move left and right, promptly move along first direction, and second supplying cam 37 links to each other with slide bar 40 by transmission and controls it, so that slide bar is moved forward and backward, promptly moves along second direction.

Slide bar 40 comprises a baffle plate 41 integrally formed with it or that be fixed in slide bar 40 rigidly, so that move together.In the process that the slide bar 40 by first and second supplying

cams

36 and 37 controls moves, baffle plate 41 moves horizontally between a position of position of contiguous sewing workstation 82 and the outlet 44 of contiguous fastener supply pay-off 43, and fastener is supplied pay-off 43 and is positioned at the gap one segment distance place, station 82 left sides that threads.This baffle plate 41 can be supplied fastener a fastener in the fasteners heap in the pay-off 43 and pull out and it is supplied to sewing workstation 82, and this will be described in the back.

What be positioned at sewing workstation 82 fronts is a folding guide 45, and it can folding fabric band section T, when the fabric band T that extracts out from take-up roller R by should be folding during guide 45, its first and second relative lateral edge portions are overlapped each other basically.One outlet mouth 46 and an import mouth 47 relative with outlet mouth 46 should folding guide 45 be arranged, and folding guide 45 is arranged to along the feed channel extension of fabric band T and is parallel to webbing feeding direction Q, its outlet mouth 46 is positioned near the sewing workstation 82.Will fold or the shape of crimping according to fabric band T, the length range of twofold guide 45 can be 150 to 350 millimeter.

In an illustrated embodiment, folding guide 45 is to form three those folding classes in fabric band T.More particularly, shown folding guide 45 is design like this and structure, when being fabric band T from inlet mouth 47 towards outlet mouth 46 through folding guide 45, its first and second relative lateral edge portions are folding inwardly gradually, make an imbricate on another, before it exposes outside from outlet mouth 46 courts, only the first side edge part of the fabric band T on the second side of fabric band T edge part is folding inwardly again, with between second side edge part and first side edge remainder, as shown in figure 16, and basically as illustrated in Figures 5 and 6.

Being positioned at sewing workstation 82 back, promptly in a side relative with folding guide 45 of sewing workstation 82, is one to send the feeding roller mechanism 50 of fabric band T to along webbing feeding direction Q.This feeding roller mechanism 50 comprises: one can be that pulse motor also can be the drive motor 51 of servomotor, and it is fixedly mounted on the frame; One by transmission and drive motor 51 link, the one end has a gear 53 feeding roller 52; And end has a gear 54, is positioned at the hold-down roller 55 on the feeding roller 52 one by one.

Hold-down roller 55 can promote certain distance, and for example when operation one lifting arm 57 made fabric band T insert between the

roller

52 and 55, hold-down roller 55 can promote about 6 millimeters from feeding roller 52.But as shown in Figure 8, hold-down roller 55 is generally setovered such as the biasing member (not shown) of bias spring by one, thereby makes gear 54 and gear 53 engagements, so that fabric band T is clipped between two rollers.So, be easy to find out that feeding roller 52 and hold-down roller 55 can be driven motor 51 and drive, rotate with the longitudinal axis of opposite directions separately around oneself, send into fabric band T along webbing feeding direction Q thus.

It is to be noted, under situation about with Sewing machines clasp H being sewn onto in succession on the fabric band, be formed with the release catch type groove (escapement groove) 56 that extends around circumference on the outer surface of hold-down roller 55, make that the clasp H that is sewn onto on the fabric band T can be by below the hold-down roller 55 represented with chain-dotted line among Fig. 8.On the other hand, sewing up with Sewing machines under the situation of buttonhole E with similar approach, hold-down roller 55 is any release catch type groove shown in the chain-dotted line among Fig. 8 not.

Numbering 60 expression among the figure be one that can see from figure, be fixed on the encoder of Sewing machines 80 1 robotic arm right-hand ends with a bearing support 81.But the coupling 61 that this encoder 60 has the right-hand member of transmission ground and armshaft 87 to link makes the angular displacement of encoder 60 detectable armshafts 87, and probe 83 is in the position of vertical direction with respect to the fabric band T that moves through sewing workstation 82 thus.Output signal from pointer 83 positions of encoder 60 outputs to a control device 65 shown in Figure 2.

Consult Fig. 2 below, control device 65 is to design like this, and when the output signal from encoder 60 was input to control device 65, control device 65 can be controlled the pulse motor 51 of feeding roller mechanism 50 and the servomotor 30 of drive cam shaft 25.The concrete mode that control device 65 is controlled

motor

30 and 51 depends on the state of style selector switch 67.

Style selector switch 67 has been stored multiple through patterns for sewing programming, that give jack per station, thereby, as long as select one of them number, just can select a concrete programming patterns for sewing, and therefore have respectively and the relevant style number of patterns for sewing of programming.This style selector switch 67 is electrically connected with control device 65, therefore, when on style selector switch 67, setting a kind of style number of wanting mutually, will make control device 65 work, to go to control

motor

30 and 51 according to a kind of programming patterns for sewing relevant with selected style number.

In other words, by selecting a kind of style number in the style selector switch 67, control device 65 will control to the revolution of camshaft 25 on the required numerical value with respect to the revolution of armshaft 87, and the straight partial L of the fabric band T that extends between adjacent two fasteners such as adjacent two buttonhole E simultaneously is sewn.Therefore, according to selected style number, not only can change by Sewing machines 80 and be formed on seam pin quantity on the fabric band T, after can also moving up at pin 83 as the result of one of armshaft 87 complete rotation, at once change along webbing feeding direction Q and send the roller 52 of feeding roller mechanism 50 of fabric band T and 55 angular displacement to, make fabric band T be sewed the amount of sending into of fabric band T afterwards, promptly suture spacer can change.

It is to be noted, in the above description, rotate around its oneself longitudinal axis, adopt a transmission system, make servomotor 30 by transmission system drive cam shaft 25 independently in order to make camshaft 25, and with armshaft 87 no drive connections.But, adopt any traditional transmission system of worm screw 88 and worm gear 89 all can use, respectively shown in Fig. 3 and 4.

Consult Fig. 3, the end of worm screw 88a and gear 69 are integrally formed or be rigidly connected, and worm screw 88a is installed on the armshaft 87 with gear 69, rotates to be independent of armshaft 87.Driving gear 70 engagements on gear 69 and the power transmission shaft that is rigidly connected to servomotor 30, on the other hand, worm screw 88a and worm gear 89 engagements that are installed on the camshaft 25 are so that rotate together.Therefore, can be readily seen that the driving force of servomotor 30 is by the engagement between gear 69 and 70 and be delivered to camshaft 25 by the engagement between worm screw 88a and the worm gear 89 more subsequently.

In transmission system shown in Figure 4, the end of worm screw 88b and a synchronous belt pulley 71 are integrally formed or be rigidly connected, and worm screw 88b is installed on the armshaft 87 with synchronous belt dish 71, rotates to be independent of armshaft 87.Synchronous belt dish 71 is in transmission connection by a synchronous belt 72 and a synchronous belt pulley 73 on the power transmission shaft that is rigidly connected to servomotor 30, and on the other hand, worm screw 88b and worm gear 89 engagements that are installed on the camshaft 25 are so that rotation together.Therefore, can be readily seen that the driving force of servomotor 30 is by the synchronous belt dish 71 that is in transmission connection with

synchronous belt

72 and 73 and be delivered to camshaft 25 by the engagement between worm screw 88a and the worm gear 89 more subsequently.

The use advantage of one of traditional transmission system shown in Fig. 3 and 4 respectively is that the Sewing machines that adopts can be that class with known essential structure when enforcement is of the present invention.In addition, the rotation of camshaft 25 can be controlled as required by servomotor 30.

Fabric band T by the moving of the sending to of sewing workstation 82, pin 83, swing that fastener (or clasp H or buttonhole E) is fed to sewing workstation 82 and pin 83 in succession all by a microcomputer controller or sequence controller control.

To describe the work of the Sewing machines 80 of said structure below, wherein buttonhole E will be sewn onto on the fabric band T with 19.1 millimeters normal space for example shown in Figure 10.

During beginning, the operator of Sewing machines 80 must be by manually extracting one section webbing T out from take-up roller, the front end that makes webbing T is by folding guide 45, at last, the front end of webbing T is by the roll gap district between the

roller

52 and 55 that passes through feeding roller mechanism 50 as shown in Figure 1 after the sewing workstation 82.It is to be noted that fabric band T fold in aforesaid mode that part of between the roller mechanism 50 of outlet mouth 46 and feeding, the front end of the webbing T by feeding roller mechanism 50 roll gaps enters with folding form and feeds between roller 52 and the hold-down roller 55.Fabric band T finishes so that entering of folded form is following: action bars 57, with the opposing bias force hold-down roller 55 is upwards promoted from feeding roller 52, subsequently at the webbing front end that is folded by release lever 57 after the roll gap district, make hold-down roller 55 rely on feeding roller 52.

After this, on style selector switch 67 shown in Figure 2, set the style number, this style number buttonhole E is corresponding with the seam pin style that 19.1 millimeters of normal pitches are sewn onto on the fabric band T successively with shown in Figure 10.Like this, the set-up procedure of being undertaken by the operator has just been finished.

(not shown) when the operator starts the starting switch of Sewing machines 80 has just begun automatical stitching.Because Sewing machines is activated, servomotor 30 drive cam shaft 25, supplying

cam

36 and 37 and needle swing cam 32 with its rotation.A nethermost outlet from pay-off 43 of the buttonhole E heap in the pay-off 43 is pulled out outward, be fed to sewing workstation 82 subsequently, simultaneously the anchor hole of buttonhole E is between two folded edge that overlap above another as shown in figure 16 of fabric band T in the gap, in this process, supplying

cam

36 and 37 rotation make sliding bar 40 reciprocatingly slide along the direction that is parallel to armshaft 87.Gong Ying buttonhole E is blocked with the form between the folded edge that is sandwiched in fabric band T by baffle plate 41 like this.

Meanwhile, the armshaft 87 that drives Sewing machines 80 rotates around its own longitudinal axis, make pin 83 formed among Fig. 9 with 1 represent first stitch pin.When pin 83 has formed first seam after pin 1 when mobile up, needle swing cam 32 makes pin 83 move a predetermined distance, for example from Fig. 1, see towards right or seeing from Figure 10 move about 2.5 millimeters up, to finish stitching, forms second shown in Figure 9 and stitches pin 2.

Subsequently when pin 83 is mobile up after second seam of formation pin 2, needle swing cam 32 makes pin 83 mobile phases preset distance together, promptly from Fig. 1, see towards a left side or seeing from Figure 10 move about 2.5 millimeters down, to finish stitching, forms the 3rd shown in Figure 9 and stitches pin 3.

By repeat stitching with the method, just can form Z-shaped style shown in Figure 9 and sew up.But, in sewing process, after the 7th seam pin 7 formed, the pulse motor 51 of feeding roller mechanism 50 drives the feeding roller and hold-down

roller

52 and 55 rotates with reciprocal respective direction, make fabric band T send a predetermined distance to, for example about backwards 2.8 millimeters along webbing feeding direction Q.At this moment,, send synchronously along webbing feeding direction Q towards backward shift about 2.8 millimeters backwards to, buttonhole E is held in place with the baffle plate 41 and the fabric band T of slide bar 40 one or tight connection by the effect of supplying

cam

36 and 37.

After pin 83 has formed the 8th seam pin 8 as shown in Figure 9, pulse motor 51 is restarted, make fabric band T send about 2.8 millimeters backwards to along webbing feeding direction Q, meanwhile, with the baffle plate 41 of slide bar one or tight connection also about 2.8 millimeters, buttonhole E is held in place along webbing feeding direction Q towards backward shift.

After pin 83 had formed the 9th seam pin 9, oscillating cam 32 made pin 83 towards moving right about 2.5 millimeters, to finish stitching, formed the tenth seam pin 10, and pin 83 forms the 11 seam pin 11 at last again towards moving left about 2.5 millimeters subsequently.

After this, pin 83 stitches pin 15 owing to replace the mobile stitching of form of carrying out by oscillating cam about 32 up to forming the 15.In the process of this stitching, because the effect of supplying

cam

36 and 37, the buttonhole E court that baffle plate 41 leaves on fabric band T moves left, and turns back to the position below 43 outlets 44 of fastener supply pay-off again.

Engage with next buttonhole E in pay-off 43 subsequently with baffle plate 41 slide bar 40 one or tight connection, that turned back to the position below pay-off 43 outlets, make it can be fed to suture location 83 at last, the distance that this position is predetermined apart from first buttonhole E that is sewn with respect to webbing feeding direction Q has finished that thus the first buttonhole E is sewn onto a circulation on the fabric band T.

After the first buttonhole E so sews up, before second buttonhole E is sewn onto fabric band T, sew up at the enterprising line linearity of the segment length L of fabric band T.

In this straight line sewing process, pulse motor 51 starts, and makes fabric band T send a preset distance to, as shown in figure 10 1.5 millimeters backwards for example, and pin 83 then forms the 16 seam pin 16 as shown in Figure 9.After this, pin 83 serving textile band section T sew up with the straight line of finishing on the distance L, and simultaneously, pulse motor 51 starts subsequently, repeatedly to send fabric band T to 1.5 millimeters backwards, up to the 23 the seam pin 23 that forms as shown in Figures 9 and 10.

After pin 83 is finished the 23 seam of stitching formation pin 23, when fabric band T sends about 1.5 millimeters backwards to, with the baffle plate 41 of slide bar 40 one or tight connection next buttonhole E is fed on the sewing workstation 82, and this buttonhole E then is clamped in leaving between two folded edges of the first buttonhole E, one preset distance with respect to webbing feeding direction Q of fabric band T.

By repeating aforesaid stitching, according to the represented stitching style of the style number that is located at style selector switch 67, buttonhole E is sewn onto on the fabric band T successively with 19.1 millimeters interval shown in Figure 10.

When buttonhole E will be with little spacing for example for example 19.1 millimeters when alternately being sewn onto fabric band T and going up of 12.7 millimeters and normal pitches, buttonhole E will alternately sew up with as shown in Figure 5 little spacing and normal pitch according to the style number relevant with sewing up style, and this style number must be set on the style selector switch 67.

If the style number relevant with stitching style shown in Figure 5 is set on the style selector switch 67, will carry out the program that is stored in the control device 65, control servomotor 30 and pulse motor 51 are finished stitching according to the stitching style that is set to the style number of style selector switch 67.In other words, when buttonhole E sews up with little spacing, straight partial L between the adjacent two buttonhole E must be sewed up five times, and to form five seam pin, fabric band T is sent to a segment distance by feeding roller mechanism 50 along webbing feeding direction Q, for example 1.42 millimeters, on the other hand, when buttonhole E then sewed up with normal pitch, the straight partial L between the adjacent two buttonhole E must be sewed up nine times, to form nine seam pin, fabric band T is sent to 1.5 millimeters by feeding roller mechanism 50 along webbing direction Q.Like this, buttonhole E alternately is stitched on the fabric band T successively with the spacing of 12.7 millimeters and 19.1 millimeters.

On the other hand, when buttonhole E will be with for example 25.4 millimeters when alternately being sewn onto fabric band T and going up of 19.1 millimeters normal pitch and big spacings, buttonhole E will alternately sew up with as shown in Figure 6 19.1 millimeters normal pitch and 25.4 millimeters big spacing according to the style number relevant with sewing up style, and this style number must be set on the style selector switch 67.

If the style number relevant with stitching style shown in Figure 6 is set on the style selector switch 67, will carry out the program that is stored in the control device 65, finish stitching according to the stitching style that is set to the style number of style selector switch 67 with control servomotor 30 and pulse motor 51.In other words, when buttonhole E sews up with normal pitch, straight partial L between the adjacent two buttonhole E must be sewed up nine times, to form nine seam pin, fabric band T is sent to a segment distance by feeding roller mechanism 50 along webbing feeding direction Q, for example 1.5 millimeters, on the other hand, when buttonhole E then sews up with big spacing, straight partial L between the adjacent two buttonhole E must be sewed up ten secondaries, to form 12 seam pin, fabric band T is sent to a segment distance along webbing direction Q, for example 1.52 millimeters by feeding roller mechanism 50.Like this, buttonhole E alternately is stitched on the fabric band T successively with the spacing of 19.1 millimeters and 25.4 millimeters.

Therefore, according to the present invention, any combination of little spacing and big spacing can both be carried out as requested.

When describing previous embodiment of the present invention, related to buttonhole E has been sewn onto on the fabric band T.Similarly description also can be applied to clasp H is sewn onto on the similar fabric band equally, and is just passable as long as the baffle plate 41 of pay-off 43, fastener supply mechanism 35 and the cam path separately in

cam

32,36 and 37 have the structure and/or the shape that are adapted to clasp H.

According to the present invention, when the spacing between adjacent two fasteners need change, as long as changing the style number that is set on the style selector switch 67 just can accomplish, make the output signal work of control device 65 responses from style selector switch 67, remove to control servomotor 30 (also can adopt pulse motor), be formed on seam pin number in the straight sutured portion between adjacent two fasteners with change, therefore, the spacing between fastener can suitably be set.

Also have, between fastener spacing hour, the seam pin number that is formed on the fabric band T can be minimum, and sew application can effectively be finished.On the contrary, when the spacing between the fastener was big, the seam pin number that is formed on the fabric band T reached at most, to obtain suitable stitch pitch, obtains firm stitching.

Under any circumstance, the present invention can both provide fastener by high-quality goods firm and that effectively sew up.

Also have, according to the present invention, servomotor 30 does not allow armshaft 87 transmissions of this transmission system 25 with Sewing machines 80 by transmission 6 system drive camshafts 25 that comprise worm screw 88 and worm gear 89.Therefore, with comparing meticulously of when setting camshaft, needing up to now, in Sewing machines of the present invention, do not needed with the mechanism of pinpoint prior art with respect to the position of armshaft.

In addition, when fastener will be sewed up with a variable spacing, and stitch pitch between the fastener is become when suitable, must change worm screw 88, worm gear 89 and supplying

cam

36 and 37 when using traditional Sewing machines, this will join armshaft 87, camshaft 25 and associated parts and finish by removing and refilling.But therefore the present invention has saved those complexity effectively and time-consuming procedure, helps the saving of time and expense.

Though describe the present invention in conjunction with the accompanying drawings as an example in detail, it is to be noted that various changes and variation are conspicuous to those skilled in the art.Therefore, unless this change and variation have broken away from essence spirit of the present invention and scope, otherwise, they should be interpreted as comprising within the scope of the present invention.

Claims

1. fastener sewing machine, it can be with fastener with on preset space length automatical stitching to the section webbing, and fabric band is sent to and by a sewing workstation, described Sewing machines comprises along a direction simultaneously:

The armshaft that one driving needle moves up and down;

One fastener supply mechanism comprises a camshaft and first and second supplying cams that are installed on the camshaft, so that successively fastener is fed to sewing workstation singly; And

One is independent of the drive motor of armshaft ground drive cam shaft.

2. Sewing machines as claimed in claim 1 is characterized in that described drive motor comprises a pulse motor.

3. Sewing machines as claimed in claim 1 is characterized in that described drive motor comprises a servomotor.

4. fastener sewing machine, it can be with fastener with on preset space length automatical stitching to the section webbing, and fabric band is sent to and by a sewing workstation, described fastener sewing machine comprises along a direction simultaneously:

The armshaft that one driving needle moves up and down, this armshaft have a worm screw mounted thereto, rotate so that be independent of armshaft ground;

One fastener supply mechanism comprises a camshaft and first and second supplying cams that are installed on the camshaft, so that successively fastener is fed to sewing workstation singly, described camshaft has a worm gear mounted thereto, so that rotate together;

A drive motor; And

One comprises that first and second take turns the driving transmission system of part, described first round part links to each other with worm screw and rotates, described second takes turns component links to each other with drive motor, and described driving transmission system can arrive camshaft with the drive transmitting of drive motor, is independent of armshaft with drive cam shaft and rotates.

5. Sewing machines as claimed in claim 4 is characterized in that described drive motor comprises a pulse motor.

6. Sewing machines as claimed in claim 4 is characterized in that described drive motor comprises a servomotor.

7. Sewing machines as claimed in claim 4 is characterized in that, described first round part is a driven gear, described second take turns part be one with the driving gear of driven gear engagement.

8. Sewing machines as claimed in claim 4, it is characterized in that, described first round part is one by movable strap disc, and described second to take turns component be a belt pulley initiatively, but initiatively belt pulley be connected in initiatively by one and by the synchronous belt between the movable strap disc and with by the movable strap disc transmission link.