CN1458327A - Sewing machine - Google Patents

Abstract

To achieve the efficiency in the sewing work in a sewing machine having a thread cutting mechanism, a presser lifter mechanism and a thread sweeping mechanism by checking the operation of the presser lifter mechanism as required while preventing the delay in the cycle time simplifying the mechanisms and the controls. The sewing machine has the thread cutting mechanism 10, the presser lifter mechanism 30, the thread sweeping mechanism 50 and a drive means for driving the mechanisms is provided with the first cam 61 which has a thread cutting operation part for converting rotary driving forces of a single pulse motor 80 as the drive means to those to match the thread cutting mechanism 10 and the second cam 62 which has a thread sweeping operation part and a presser lifting operation part for converting rotary driving forces of the pulse motor 80 to those to match the thread sweeping mechanism and the presser lifter mechanism. The first cam and the second cam are arranged in such a phase difference as to operate the thread cutting mechanism, the thread sweeping mechanism and the presser lifter mechanism sequentially with the rotation of the pulse motor.

Description

Sewing machines

Technical field

The present invention relates to a kind of Sewing machines with tangent mechanism, presser bar lifting mechanisms and Unwinding line mechanism.

Background technology

In recent years, have the tangent mechanism that cuts off suture after being used to make immediately, the Sewing machines that makes foot device be displaced into the Unwinding line mechanism of the presser bar lifting mechanisms of top and the line of falling the loose side is practical.

Above-mentioned Sewing machines in the past, owing to be provided with the driving mechanism that each is used to drive Unwinding line mechanism, tangent mechanism, presser bar lifting mechanisms, so complex structure and number of spare parts are many, and Sewing machines is also by heavinessization, maximization, again owing to use the main operator of Sewing machines mostly to be the women, so the operation of using the benzene weight enlarges the problem that the space has reduced operating efficiency made from regard to becoming burden and having produced because of needs as making factory.

But, in having the Sewing machines of this sampling device, the circulation sewing machine for sewing is arranged also.Use this circulation sewing machine for sewing after forming 1 circulation stitching, will near this stitching, continuation form another circulation stitching sometimes.For example, when nail 4 hole buttons on cloth, at first pass two central holes of 4 holes and form stitchings, and carry out for not residual transition line forming when passing the stitching in two remaining holes again behind the tangent line, preferably from the circulation stitching that is used to form two initial holes to the circulation stitching that is used to form two remaining holes, be not moved upward foot device and intactly keep cloth, make operation continuously.

In addition, when not wishing to form the transition wire that is connected between initial circulation stitching and the next circulation stitching for outward appearance, must after forming initial circulation stitching, carry out thread cutting action and line falling action.

The applicant, at first applied for making the invention of the Sewing machines of tangent mechanism and presser bar lifting mechanisms action with same driving mechanism, but on this kind Sewing machines, produced in case forming initial laggard capable thread cutting action of circulation stitching and line falling action, also interlock of presser bar lifting mechanisms then, and presser feet can be away from keyboard, therefore produced cloth and moved, and the starting position of next stitching is from the problem of desirable position deviation.

Particularly, at foot device on the Sewing machines of compress type under the state of clamping button, button and cloth also are moved upward together in case foot device is moved upward, then when foot device descends, perhaps under the position deviation of button or state, depress, in case form stitching then the possibility of broken needle is arranged at cloth folding.

The objective of the invention is to make Sewing machines to reduce number of spare parts with tangent mechanism, presser bar lifting mechanisms and Unwinding line mechanism and alleviate Sewing machines weight, make its miniaturization.

And, remove the discomfort of making operation with the method for control presser bar lifting mechanisms action as required, in the quality that improves sewings, realize the high efficiency of work.

And, irrelevant and make circulation by shortening and improve the efficient of work with sewing condition.

Summary of the invention

In order to address the above problem, the present invention's 1 described Sewing machines, has to shown in Figure 10 as Fig. 1:

Possess and be used for making the tangent mechanism 10 that cuts off the movable cutting edge 15d of the suture that links to each other with eedle below the thing, make the presser bar lifting mechanisms 30 that rises from the presser feet of making above the thing by the elastic force compress 71, intersecting and be displaced into eedle and make on the suture path between the thing and have making thing and draw Unwinding line mechanism 50 with the line falling sheet (slide 58) of the suture of tangent mechanism cut-out, it is characterized in that, have: single CD-ROM drive motor (impulse motor 80) and

With above-mentioned CD-ROM drive motor interlock and can rotate and possess variation by rotatable phase make above-mentioned tangent mechanism action the X2 of tangential cam portion the 1st cam 61 and

With above-mentioned CD-ROM drive motor interlock and can rotate and possess variation by the rotatable phase of the phase difference that has regulation with respect to above-mentioned the 1st cam make the line falling cam part of above-mentioned Unwinding line mechanism action and make by the variation of above-mentioned rotatable phase above-mentioned presser bar lifting mechanisms action pressure foot lifting cam part Y2 the 2nd cam 62 and

For the above-mentioned tangential cam portion that connects above-mentioned the 1st cam and the 1st attaching parts (tangent line connecting rod 11) that above-mentioned tangent mechanism disposes and

The 2nd attaching parts (pressure foot lifting connecting rod 31) that dispose for the above-mentioned line falling cam part that connects above-mentioned the 2nd cam and above-mentioned pressure foot lifting cam part and above-mentioned Unwinding line mechanism and above-mentioned presser bar lifting mechanisms;

The phase difference of the afore mentioned rules of above-mentioned the 1st cam and above-mentioned the 2nd cam is formed in the structure that makes above-mentioned Unwinding line mechanism and presser bar lifting mechanisms action by the rotation of above-mentioned CD-ROM drive motor, by above-mentioned tangent mechanism end thread cutting action later on again.

According to the present invention 1 owing to can drive tangent mechanism, presser bar lifting mechanisms and Unwinding line mechanism,, make its miniaturization, and cheaply and can increase work efficiency so can reduce number of spare parts and alleviate Sewing machines weight with single CD-ROM drive motor.

And, always make these tangent mechanisms, Unwinding line mechanism and presser bar lifting mechanisms action in certain moment, for example, can make from finishing thread cutting action and line falling and move time delay of beginning pressure foot lifting action always for certain.The result is the delay that can prevent cycle period.

The present invention's 2 is 1 described Sewing machiness according to the present invention, it is characterized in that: the positive and negative rotation of above-mentioned CD-ROM drive motor energy,

The above-mentioned tangential cam portion of above-mentioned the 1st cam, the above-mentioned line falling cam part and the above-mentioned pressure foot lifting cam part of above-mentioned the 2nd cam are formed the action of above-mentioned tangent mechanism, above-mentioned Unwinding line mechanism and above-mentioned presser bar lifting mechanisms and the shape of the identical difference symmetry of the irrelevant to rotation direction of above-mentioned CD-ROM drive motor.

According to the present invention 2, because the tangential cam portion of the 1st cam, the line falling cam part and the pressure foot lifting cam part of the 2nd cam, constituted the shape of the difference symmetry of making same action of the irrelevant to rotation direction of the action of tangent mechanism, Unwinding line mechanism and presser bar lifting mechanisms and CD-ROM drive motor, so no matter CD-ROM drive motor can carry out identical thread cutting action, line falling action and pressure foot lifting action to positive and negative that direction rotation.Therefore, can realize the slick and sly operation of making.And,, can be chosen in tangent line and only do line falling action later on and do not do the action of pressure foot lifting action and do the action of line falling action and pressure foot lifting action at tangent line later on according to such structure.

The present invention's 3 is 2 described Sewing machiness according to the present invention, as Fig. 8, Figure 11, Figure 12 and shown in Figure 14, it is characterized in that:

Above-mentioned the 1st cam 61 and above-mentioned the 2nd cam 62,

Be configured to the zone of being failure to actuate that any one mechanism of the above-mentioned tangent mechanism 10 of clamping, above-mentioned Unwinding line mechanism 50 and above-mentioned presser bar lifting mechanisms 30 all is failure to actuate,

And possesses controlling organization CPU90, this controlling organization can switch and realize flexibly: to make above-mentioned tangent mechanism, above-mentioned Unwinding line mechanism and above-mentioned presser bar lifting mechanisms rotate by the direction of rotation of this sequentially-operating above-mentioned CD-ROM drive motor the 1st control model and after making above-mentioned tangent mechanism and above-mentioned Unwinding line mechanism rotate above-mentioned CD-ROM drive motor and before making the action of above-mentioned presser bar lifting mechanisms by the direction of rotation of this sequentially-operating to the above-mentioned CD-ROM drive motor of counter-rotation and make the position of rotation of above-mentioned CD-ROM drive motor be positioned at the 2nd control model in the above-mentioned zone of being failure to actuate.

According to the present invention 3, but also realize to the 1st control model that makes tangent mechanism, Unwinding line mechanism and presser bar lifting mechanisms by the direction of rotation rotating drive motor of this sequentially-operating owing to have flexible conversion, with after making tangent mechanism, Unwinding line mechanism and before making presser bar lifting mechanisms action by the direction of rotation rotating drive motor of this sequentially-operating to the counter-rotation CD-ROM drive motor and make the position of rotation of CD-ROM drive motor be positioned at the controlling organization of the 2nd control model in the zone of being failure to actuate, so can carry out making operation reliably corresponding to various situations.

Thereby, for example, on not residual line ground 4 hole buttons nail on cloth and not is not moved upward the presser feet of foot device and when intactly keeping cloth to make continuously, owing to the discomfort that presser feet because of presser bar lifting mechanisms action and foot device is moved upward caused cloth offset etc. can not take place, so can realize making the high efficiency of operation.

In addition, when not wishing to form the line that is connected between previous stitching and the next stitching for outward appearance, at first, realize the 2nd control model with controlling organization, and with this action of carrying out thread cutting action and line falling action later on and suppressing presser bar lifting mechanisms at the previous stitching of formation, then, after forming next stitching, realize the 1st control model, can in the end promote presser feet and finish and make with this with controlling organization.Therefore, owing to do not form the line that is connected between previous stitching and the next stitching, can improve the high efficiency that the quality of sewings also can realize operation.

In addition, when not wishing to form the line that is connected between initial stitching and the next stitching for outward appearance, at first, by realize the 2nd control model by controlling organization, make tangent mechanism and the action of Unwinding line mechanism later at the initial stitching of formation, and suppress the action of presser bar lifting mechanisms, then, by realizing that by controlling organization the 1st control model can form next stitching, presser feet is risen and finish and make.Therefore, owing to do not form the line that is connected between initial stitching and the next stitching, so can improve the quality of sewings

The present invention's 4 is 3 described Sewing machiness according to the present invention, it is characterized in that:

When possessing above-mentioned Unwinding line mechanism 50 action in above-mentioned the 2nd control model, the movable area change CPU90 of mechanism of the movable area of the above-mentioned line falling sheet (slide 58) of the above-mentioned Unwinding line mechanism of change.

According to the present invention 4, owing to possess (promptly in above-mentioned the 2nd control model, when presser bar lifting mechanisms being failure to actuate continuing the action of Unwinding line mechanism) the action of Unwinding line mechanism the time, the above-mentioned Unwinding line mechanism of change the movable area change mechanism of movable area of above-mentioned line falling sheet, so can suitably set the movable area of line falling sheet according to the thickness of thickness that is implemented tailoring cloth or the suture that is used to make.Therefore, can suppress the unnecessary swing of line falling sheet and can shorten the required time of line falling sheet swing, improve sewing efficiency.

According to the present invention 5 to 7, can make simple in structurely, and can realize lightweight, miniaturization.

Description of drawings

Fig. 1 is the key diagram that is used to illustrate tangent mechanism, presser bar lifting mechanisms and Unwinding line mechanism that the reinforcing seam sewing machine of the embodiment of the invention is possessed.

Fig. 2 is the vertical view that expression is moved when constituting the fixed cutting tool parts of tangent mechanism shown in Figure 1 and movable cut part tangent line.

Fig. 3 is the presser bar lifting mechanisms shown in Figure 1 and the amplification stereogram of Unwinding line mechanism.

Fig. 4 is the amplification stereogram of state before the expression Unwinding line mechanism action shown in Figure 1.

Fig. 5 is the enlarged side view of state before expression Unwinding line mechanism shown in Figure 1 and the presser bar lifting mechanisms action.

Fig. 6 is the amplification stereogram of expression Unwinding line mechanism operating state shown in Figure 4.

Fig. 7 is the expression Unwinding line mechanism shown in Figure 5 and the enlarged side view of presser bar lifting mechanisms operating state.

Fig. 8 (a) is the stereogram of the cam part that possessed of reinforcing seam sewing machine shown in Figure 1, (b) is the vertical view of the 1st cam of the cam part shown in (a), (c) is the vertical view of the 2nd cam of the cam part shown in (a).

Fig. 9 is the key diagram that is used to illustrate the tangent line pressure foot lifting action of reinforcing seam sewing machine shown in Figure 1.

Figure 10 is the key diagram that is used to illustrate the tangent line pressure foot lifting action of reinforcing seam sewing machine shown in Figure 1.

Figure 11 is the calcspar of electric formation that is used to illustrate the reinforcing seam sewing machine of the embodiment of the invention.

Figure 12 is the flow chart of control action that is used to illustrate the reinforcing seam sewing machine of the embodiment of the invention.

Figure 13 is the instance graph of the control data of the expression reinforcing seam sewing machine that is used to control the embodiment of the invention.

Figure 14 is to be the ideograph of central representation with the control action of the reinforcing seam sewing machine of the embodiment of the invention, with the amount of movement of tangent line connecting rod and pressure foot lifting connecting rod.

Among the figure: 10-tangent mechanism, 11-tangent line connecting rod, the chimeric pin of 11a-, the 11b-bend, the 11c-bottom, 12-supporting pin, 13-tangent line connecting rod, 14-fixed cutting tool parts, the 14a-counteredge, the movable cut part of 15-, 16-installing plate, 17,21, the 55-screw, 18, the 41-light-blocking member, 18a, the 41a-shadow shield, 19,40-light breaker, the movable cutting knife attaching parts of 20-, the 22-connecting pin, 23-tangent line lever, the movable cutter connecting rod of 24-, the 25-hold-down screw, the 30-presser bar lifting mechanisms, 31-pressure foot lifting connecting rod, 31a-upper end, the 31b-bend, the 31c-bottom, 32-pressure foot lifting drive link, 33-coupled arm, the 34-spindle unit, the 35-actuating arm, the 35a-leading section, the 36-pressure foot lifting drives pin, the 37-support bar, the 38-pin, 42-fulcrum pin, 43-roller, the 44-wind spring, 50-Unwinding line mechanism, the 51-slide connects connecting rod, 51a-rearward end, the 51b-leading section, the 51c-cross-drilled hole, 52-slide L type connecting rod, 52a-fitting pin, the 53-helical spring, the 54-spacer pin, 56-slide connecting plate, 57-gripper shoe, the 58-slide, 58a-one end, 58b-line falling portion, 59-gripper shoe, the 60-cam part, 61-the 1st cam, 61a-cam path, 62-the 2nd cam, the 62a-cam surface, the 70-cloth-pressing device, 71-presser feet, 72-supporting seat, 73-presser feet drive link, 73a-one end, 73b-top extension, 73c-is abutted against pin, the 74-spindle unit, the 80-impulse motor, 81-main shaft, 90-CPU, 91-ROM, 92-RAM, 93-guidance panel, 94-press button, the 95-starting switch, the 100-Spindle Motor, the initial direction of rotation of S1-is set step, S2-compress step, S3-data address initialization step, the S4-stitch data reads in step, S5-tangent line line falling step, other instruction implementation steps of S6-, S7, S8-data address step of updating, S9-pressure foot lifting step, the S10-impulse motor stops step, and S11-identifies inversion step, S12-impulse motor inversion step, X1, the Y1-arc sections, X2-variable curvature portion, Y2-elliptical section.

The specific embodiment

Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the present embodiment, be example with Sewing machines of the present invention, the reinforcing seam sewing machine that forms sawtooth suture mark with flush joint is described.The reinforcing seam sewing machine of present embodiment, make figure according to the regulation that is stored in the not shown memory, co-operating by eedle and machine shuttle is made, and after making, begin the action of tangent line lifting presser feet in the moment of regulation according to being contained in the tangent line instruction or the pressure foot lifting instruction of making in the figure.

The reinforcing seam sewing machine of present embodiment has: be used for after making the end of job, cutting off immediately upper thread and bottom line tangent mechanism 10, making presser bar lifting mechanisms 30 that the presser feet 71 that makes foot device 70 before and after the operation rises, pouring out the upper thread that is connected with cloth from eedle after cutting off upper threads and before presser feet 71 risings of foot device 70 and the end of a thread of eedle side be drawn to Unwinding line mechanism 50 on the cloth with tangent mechanism 10.Below, referring to figs. 1 through Figure 10 tangent mechanism 10, presser bar lifting mechanisms 30 and Unwinding line mechanism 50 are described.

Fig. 1 is the key diagram that is used to illustrate the formation of tangent mechanism 10, presser bar lifting mechanisms 30 and Unwinding line mechanism 50.Fig. 2 is the vertical view that expression is moved when constituting the fixed cutting tool parts 14 of tangent mechanism 10 and movable cut part 15 tangent lines.Fig. 3, Fig. 4 and Fig. 6 are the amplification stereograms of presser bar lifting mechanisms 30 and Unwinding line mechanism 50, and Fig. 5 and Fig. 7 are the amplification stereograms of presser bar lifting mechanisms 30 and Unwinding line mechanism 50.

Fig. 8 (a) is the stereogram of (described later) cam part 60, and Fig. 8 (b) is the vertical view of the 1st cam 61 of cam part 60, the vertical view of the 2nd cam 62 of Fig. 8 (c) cam part 60.In addition, Fig. 9 and Figure 10 are to be the vertical view at center for what tangent line pressure foot lifting action was described with cam part 60.

The structure of tangent mechanism 10 at first, is described.Tangent mechanism 10 is made of tangent line connecting rod 11, tangent line connecting rod 13, fixed cutting tool parts 14, movable cut part 15 etc.

As the tangent line connecting rod 11 of the 1st attaching parts, be the elongated rhabodoid of slight curvature on the way.In the upper end of tangent line connecting rod 11, as shown in Figure 9, be provided with the chimeric chimeric pin 11a of cam path 61a with the 1st cam 61 of cam part 60 described later.And this tangent line connecting rod 11 can be installed on the not shown sewing machine frame flexibly rotationally at supported pin 12 on the bend 11b.

The bottom 11c of tangent line connecting rod 11 under the state that rotates flexibly with the rearward end of tangent line connecting rod 13, is installed on the installing plate 16 by screw 17.Light-blocking member 18 with shadow shield 18a is fixed on the end of installing plate 16.On the other hand, near light-blocking member 18, light breaker 19 is fixed on the not shown sewing machine frame.This light breaker 19 is the devices that detect tangent mechanism 10 origin positions, as shadow shield 18a during at the light-emitting component of light breaker 19 and the state between the photo detector, is positioned at the signal of origin position to above-mentioned control circuit output expression.

Tangent line connecting rod 13 is in the curvulate upward elongated rod-like members of regulation part, the below of the through needle plate 2a of its leading section 13a.As shown in Figure 2, with screw 21 movable cutting knife attaching parts 20 can be connected on the leading section 13a flexibly rotationally.And tangent line lever 23 is fixed on the movable cutting knife attaching parts 20.The connecting pin 22 that is fixed on the needle plate 2a passes movable cutting knife attaching parts 20 and tangent line lever 23, and movable cutting knife attaching parts 20 and tangent line lever 23 can be the center rotation with connecting pin 22 simultaneously.One end 24a of movable cutter connecting rod 24 can be connected flexibly rotationally the front end of tangent line lever 23.

Can be flexibly rotationally the middle body of movable cut part 15 be connected on the other end 24b of movable cutter connecting rod 24.The end 15a of movable cut part 15 can be installed on the hold-down screw 25 flexibly rotationally.Hold-down screw 25 is fixed on the needle plate 2a.The front end of movable cut part 15 is formed with and does not cut off when cutting off action and the 15b of line falling portion of the line of falling the loose side and bottom line and catch by the 15b of line falling portion and fall grabbing the 15c of line portion and being used to cut off the movable cutting edge 15d of suture of suture of pine and bending to the inside only.Near movable cut part 15, be provided with by screw and be fixed on fixed cutting tool parts 14 on the needle plate 2a, at the front end of fixed cutting tool parts 14, be formed with and movable cutting edge 15d between clamping upper thread and bottom line and with the counteredge 14a of its cut-out.

Below, the action of tangent mechanism 10 is described.Tangent mechanism 10 based on said structure, in making, be in the state of Fig. 2 (a), before the action of sewing finishing and presser bar lifting mechanisms described later 30, by cam part 60 tangent line connecting rod 11 is rotated for the counter clockwise direction of middle mind-set Fig. 1 (arrow A direction) with supporting pin 12, and forwards move its bottom.Therefore, shown in Fig. 2 (b), tangent line connecting rod 13 forwards moves, owing to promote movable cutting knife attaching parts 20 by screw 21, movable cutting knife attaching parts 20 and tangent line lever 23 are that rotate at the center with connecting pin 22.

Because of the action of this tangent line lever 23, the movable cutter connecting rod 24 that is connected its front end is rearward promoted, and movable cut part 15 is that middle mind-set clockwise direction rotates with hold-down screw 25.Because this rotational action is made upper thread and bottom line in order by the 15b of line falling portion, and the upper thread and the bottom line that should cut off is being grabbed between 15c of line portion and the counteredge 14a.

On the other hand, tangent line connecting rod 11 is that middle mind-set clockwise direction rotates with supporting pin 12, and when the rear was returned in its bottom, each parts that constitute tangent mechanism 10 were done opposite action.That is, movable cut part 15 is done the spinning movement of demobilization from the state of Fig. 2 (b), this moment is by grabbing the 15c of line portion while catching upper thread and bottom line to rotate, make upper thread and bottom line near counteredge 14a with this, shown in Fig. 2 (c), movable cutting edge 15d and counteredge 14a are involutory, the cut-out suture.Movable cut part 15 continues its reverse and returns the state of Fig. 2 (a).

Below, the structure of presser bar lifting mechanisms 30 is described.Presser bar lifting mechanisms 30 is made of pressure foot lifting connecting rod 31, pressure foot lifting drive link 32, presser feet actuating arm 35, presser feet driving pin 36 etc.

Pressure foot lifting connecting rod 31 as the 2nd attaching parts slightly is the く font, and can be installed in rotationally on the not shown sewing machine frame flexibly with fulcrum pin 42 at bend 31b place.Roller 43 (with reference to Fig. 9) is fixed on the bottom 31c of pressure foot lifting connecting rod 31, and this roller 43 is abutted against with the cam surface 62a (with reference to Fig. 8 (a), (c)) of the 2nd cam 62 of cam part 60 described later.

In addition, on Fig. 1, do not show, actual on pressure foot lifting connecting rod 31, be provided with the little pin that protrudes to the inside.Wind spring 44 is hung on this little pin, and 44 pairs of pressure foot lifting connecting rods 31 of this wind spring apply the pulling force that roller 43 always is abutted against with the cam surface 62a of pressure foot lifting cam part 62.One end 32a of pressure foot lifting drive link 32 can be connected on the upper end 31a of pressure foot lifting connecting rod 31 flexibly rotationally.

Pressure foot lifting drive link 32 is rectangular dull and stereotyped shaft-like parts, and its other end 32b can be connected the bottom of coupled arm 33 flexibly rotationally.On near the side the end 32a of pressure foot lifting drive link 32, fixing the light-blocking member 41 that has to the shadow shield 41a of horizontal direction bending.On the other hand, near this light-blocking member 41, the light breaker 40 that is made of light-emitting component and photo detector is fixed on the not shown sewing machine frame.This light breaker 40 is used to detect the home position of presser bar lifting mechanisms 30, during at the light-emitting component of light breaker 40 and the state between the photo detector, is positioned at the signal in home position at shadow shield 41a to not shown control circuit output indication.

Coupled arm 33, the end is fixed on the spindle unit 34 that can be supported in rotationally flexibly on the not shown frame by abut thereon, and form the presser feet actuating arm 35 of growing crosswise in coupled arm 33 inboards, fixed by abut and be fulcrum with respect to spindle unit 34 swings with spindle unit 34.Therefore, when coupled arm 33 with spindle unit 34 during for spot wobble, the swing interlock of presser feet actuating arm 35 and coupled arm 33 also is a spot wobble with spindle unit 34.Long up and down presser feet drives pin 36 and can be connected rotationally flexibly on the leading section 35a of this presser feet actuating arm 35.

Presser feet drives pin 36, and the cross section of its horizontal direction slightly is the コ font, when its lower edge portion 36a when descending, be abutted against with the pin 73a that is abutted against of cloth-pressing device 70.One end of the support bar 37 of growing crosswise can be supported on presser feet flexibly rotationally and drive pin 36 midway.The other end of support bar 37 can be installed on the not shown sewing machine frame flexibly rotationally by pin 38, and the direction when being driven pin 36 and descended by support bar 37 restriction presser feets.

Drive being abutted against between the pin 73c of pin 36 and the cloth-pressing device below it 70 at presser feet, be provided with the gap of given size.Therefore, presser feet drives pin 36, only postpones this gap portion from the beginning that descends and is abutted against with the pin 73c that is abutted against of cloth-pressing device 70.

At this, presser feet drives pin 36 and coupled arm 33, and it constitutes interlock as mentioned above, and the slide connection connecting rod 51 of Unwinding line mechanism 50 described later is connected on the coupled arm 33.Therefore, when presser feet driving pin 36 began to descend, Unwinding line mechanism 50 described later also moved.On the other hand, owing to be provided with above-mentioned gap between the pin 73c at presser feet driving pin 36 and being abutted against of cloth-pressing device 70, so beginning to descend through after the stipulated time from driving pin 36, the pin 73c that is abutted against of cloth-pressing device 70 is depressed, and presser feet 71 rises.

That is, drive the gap set between the pin 73c of being abutted against of pin 36 and cloth-pressing device 70, when having played action that conduct is provided with Unwinding line mechanism 50 and beginning and the function of the differential attachment of the difference of the action of presser bar lifting mechanisms 30 when beginning at presser feet.

In addition, be configured in the cloth-pressing device 70 of presser bar lifting mechanisms 30 belows, constitute by presser feet 71, supporting seat 72, presser feet drive link 73 etc.

Supporting seat 72 is fixed on the not shown Sewing machines board, and has the function that supports presser feet drive link 73.Presser feet drive link 73 as shown in Figure 3, is installed in rotation on the supporting seat 72 by spindle unit 74, and the presser feet 71 of pushing down cloth in making is fixed on the 73a of one end.And, extension 73b above being provided with on the part of presser feet drive link 73.The front end of extension 73b is provided with and is abutted against pin 73c above this, and this is abutted against pin 73c, and the presser feet that is configured in presser bar lifting mechanisms 30 drives near the below (with reference to Fig. 1 and Fig. 3) of pin 36.

Descend in case the presser feet of presser bar lifting mechanisms 30 drives pin 36, then this is abutted against pin 73c and is driven pin 36 and be pressed towards the below by presser feet, and presser feet drive link 73 be that the counter clockwise direction of middle mind-set Fig. 1 is rotated presser feet 71 risings with spindle unit 74.

Next, the structure of Unwinding line mechanism 50 is described.Unwinding line mechanism 50 is connected formations such as connecting rod 51, slide L type connecting rod 52, slide connecting plate 56, slide (line falling sheet) 58 by slide.

Unwinding line mechanism 50 has after cutting off upper threads with tangent mechanism 10 and before the presser feet 71 of foot device 70 rises, and pours out the upper thread that is connected with cloth from eedle and the end of a thread of eedle side is drawn to function on the cloth.The slide of Unwinding line mechanism 50 connects the rearward end 51a of connecting rod 51, with being connected of the coupled arm 33 of presser bar lifting mechanisms 30 (with reference to Fig. 1) midway.

Connect at slide on the leading section 51b of connecting rod 51, be formed with the cross-drilled hole 51c of horizontal length.And, near leading section 51b, disposing forming the sweep slightly be the L font and be rotatably installed on slide L type connecting rod 52 on the not shown sewing machine frame with mounting screw 55.And, be fixed in the fitting pin 52a of this slide L type connecting rod 52 upper ends, pass the cross-drilled hole 51c that slide connects connecting rod 51.

Be in the helical spring 53 of the state of being stretched, be installed in the medial surface that slide connects connecting rod 51.One end of helical spring 53 is hung on the part that slide connects connecting rod 51, and the other end is hung on the fitting pin 52a of slide L type connecting rod 52, and therefore, this slide L type connecting rod 52 is always applied right-hand power to Fig. 3 by helical spring 53.

But near slide L type connecting rod 52, spacer pin 54 is fixed on the not shown sewing machine frame projectedly.Unwinding line mechanism 50 perseverations and the pressure foot lifting drive link 32 that is used in presser bar lifting mechanisms 30 action further rearward moves, even slide L type connecting rod 52 is subjected to the spring force effect of mobile helical spring 53 rearward again, slide L type connecting rod 52 also can stop when being abutted against with spacer pin 54.

In addition, the power of helical spring 53 is because of being subjected to comprising that slide connects the resistance of connecting rod 51 and presser bar lifting mechanisms 30, its power that rearward spurs slide L type connecting rod 52 does not have so strong.Therefore, only connect connecting rod 51 when rearward mobile at presser bar lifting mechanisms 30 actions and slide, helical spring 53 just can pass through fitting pin 52a, rearward draws and mobile slide L type connecting rod 52.

The slide connecting plate 56 that above-below direction is long can be connected on the anterior end of slide L type connecting rod 52 flexibly rotationally.In the lower end of this slide connecting plate 56, form the extension 56a that extends to the rear of Fig. 1.Near slide connecting plate 56, fixing the gripper shoe 57 that is fixed on the not shown sewing machine frame.The slide 58 that slightly is the L type is seen on the plane, and being mounted screw 59 at its sweep can be connected on the gripper shoe 57 flexibly rotationally.

One end 58a of slide 58 can be connected with extension 56a flexibly rotationally.Be provided with the 58b of line falling portion that forwards protrudes in the bottom of slide 58, and fall upper thread with the 58b of this line falling portion.Fig. 4 is illustrated near the amplification stereogram the Unwinding line mechanism 50 under the preceding state of action.In addition, Fig. 5 is the enlarged side view that is illustrated in before the action presser bar lifting mechanisms 30 and Unwinding line mechanism 50 under the state.

Below, the action of presser bar lifting mechanisms 30 and Unwinding line mechanism 50 is described.Presser bar lifting mechanisms 30 and Unwinding line mechanism 50 with said structure, after cutting off upper thread and bottom line, when pressure foot lifting connecting rod 31 when the counter clockwise direction (arrow B direction) of Fig. 1 is rotated, pressure foot lifting drive link 32 is just rearward drawn.Because this action, coupled arm 33 is the swing of center back side with spindle unit 34, and with this presser feet actuating arm 35 is also rotated for middle mind-set clockwise direction with spindle unit 34.Along with the rotation of this presser feet actuating arm 35,, presser feet driving pin 36 descends while being subjected to the restriction of support bar 37.

On the other hand, by coupled arm 33 rearward swings, slide connects connecting rod 51 and rearward moves, so the fitting pin 52a in the cross-drilled hole 51c also rearward moves because of the pulling force of helical spring 53, therefore, slide L type connecting rod 52 just is the counter clockwise direction rotation of middle mind-set Fig. 1 with screw 55.Slide connecting plate 56 rises because of this rotation, rises because of this rising makes an end 58a of slide 58, and slide 58 be the counter clockwise direction rotation of middle mind-set Fig. 1 with mounting screw 59, and falls upper thread by the 58b of line falling portion.

In addition, slide L type connecting rod 52 stops operating when colliding with spacer pin 54, and slide connects the part that connecting rod 51 henceforth rearward moves, and is the slip of fitting pin 52a along cross-drilled hole 51c, does not influence the action of slide L type connecting rod 52.Make the amplification stereogram of Unwinding line mechanism 50 operating states, represent with Fig. 6.In addition, make the enlarged side view of presser bar lifting mechanisms 30 and Unwinding line mechanism 50 operating states, as shown in Figure 7.

At this moment, owing to be provided with the gap at presser feet driving pin 36 and being abutted against between the pin 73c of cloth-pressing device 70 as described above, so presser feet drives pin 36 from the beginning fall delay stipulated time, and after the end of falling the upper thread, what presser feet drove that pin 36 presses down cloth-pressing device 70 is abutted against pin 73c, and presser feet 71 is moved upward.

In addition, when because of pressure foot lifting connecting rod 31 rotates when making presser feet drive pin 36 to rise to the clockwise direction of Fig. 1, presser feet 7 descends because of deadweight.And because of coupled arm 33 repositions, slide connects connecting rod 51 and turns back to the state that the place ahead, Unwinding line mechanism 50 integral body turn back to Fig. 4 and Fig. 5.

As described above, in tangent mechanism 10, be starting point, in presser bar lifting mechanisms 30 and Unwinding line mechanism 50, be that starting point is moved with pressure foot lifting connecting rod 31 with tangent line connecting rod 11.The driving force of impulse motor 80 is delivered to tangent line connecting rod 11 and pressure foot lifting connecting rod 31 by cam part 60 moment in accordance with regulations, and makes its action.Below, this impulse motor 80 and cam part 60 are described.

Impulse motor 80 as CD-ROM drive motor of the present invention is fixed on the not shown sewing machine frame.On the output shaft 81 of impulse motor 80, fixing central portion at cam part 60 described later.Cam part 60 rotates the angle of stipulating according to impulse motor 80.

Impulse motor 80 is by controlling organization CPU90 described later institute drive controlling.Each action of tangent mechanism 10, presser bar lifting mechanisms 30 and Unwinding line mechanism 50 is by the direction of rotation of this CPU90 one side count pulse motor 80 and the umber of pulse in the action, Yi Bian control the action of cam part 60.

Cam part 60, shown in Fig. 1 and Fig. 8 (a), from the front of Fig. 1, its profile is made of the 1st cam 61 and whole the 2nd cam 62 of being located at this face side of the slightly rounded casing that comprises straight line part.

The 1st cam 61 is shown in Fig. 8 (a), at its inboard cam path 61a that slightly is heart-shaped that forms.The chimeric pin 11a of tangent line connecting rod 11, chimeric and slide with this cam path 61a along its face.

Shown in Fig. 8 (b) is the shape of cam path 61a.P1～P7 is for convenience and the emphasis angle position in the circumference of expression.Cam path 61a passing through P3 to the P7 from P2, forms apart from the equidistant circular arc of pivot C1.On the other hand, with P1 be the center from P2 to P7 between, form towards P1 and shorten apart from the shape of the symmetry of pivot distance.Below, will be called " arc sections X1 " to the P7, will be that the center is called " X2 of variable curvature portion " between from P2 to P7 through P3 from P2 with P1.

Shown in the pattern of Fig. 8 (b), along with the rotation of cam part 60, above-mentioned chimeric pin 11a moves with respect to cam path 61a.For this reason, for example with the rotation of impulse motor 80 to prescribed direction (positive direction), make chimeric pin 11a from the P2 of arc sections X1 through P3 to P7 when mobile, the distance of chimeric pin 11a and pivot C1 is constant, and tangent line connecting rod 11 does not rotate.

On the other hand, chimeric pin 11a from P7 when P1 moves, gradually near pivot C1.Therefore tangent line connecting rod 11 rotates to the counter clockwise direction of Fig. 1, and as mentioned above, movable cut part 15 moves and cross counteredge 14a.

Subsequently, chimeric pin 11a from P1 when P2 moves, gradually away from pivot C1,11 on tangent line connecting rod rotates to the clockwise directions of Fig. 1, on one side movable cut part 15 catch upper thread and bottom line and counteredge 14a between cut-out upper thread and bottom line.Impulse motor 80 rotate round about and chimeric pin 11a from P2 through P1 when P7 moves too.That is, the X2 of variable curvature portion is a tangential cam of the present invention portion.

The 2nd cam 62 by the face side of overall fixed in tangential cam portion 61, shown in Fig. 8 (c), slightly is tumbler shape, and roller 43 and its cam surface 62a of pressure foot lifting connecting rod 31 are abutted against.Q1～Q7 of Fig. 8 (c) is for convenience and the emphasis angle position in the circumference of expression.Cam surface 62a passing through Q1 to the Q3 from Q6, forms apart from the equidistant circular arc of pivot C1.

On the other hand, between from Q3 to Q4 and from Q6 to Q5, form respectively towards Q4 and Q5 and apart from the elongated symmetric shape of the distance of pivot.And, between from Q4 to Q5, form apart from the equidistant circular arc of pivot C1.Below, will be called " arc sections Y1 " to the Q3, comprise that from Q3 Q4, Q5 are called " elliptical section Y2 " to the Q6 through Q1 from Q6.

Shown in the pattern of Fig. 8 (c), along with the rotation of cam part 60, above-mentioned roller 43 relatively moves along cam surface 62a.For this reason, for example impulse motor 80 rotates to above-mentioned positive direction, and roller 43 from Q6 through Q1 to Q3 when mobile, roller 43 is constant with the distance of pivot C1, and pressure foot lifting connecting rod 31 does not rotate.

On the other hand, roller 43 leaves from pivot C1 gradually when Q3 moves to Q4.Therefore pressure foot lifting connecting rod 31 rotates to the counter clockwise direction of Fig. 3, and as mentioned above, pressure foot lifting drive link 32 rearward moves, and presser feet 71 rises in slide 58 actions of Unwinding line mechanism 50.

In addition, impulse motor 80 rotates round about, and roller 43 is turning back to Q3 and close gradually pivot C1 from Q4, and pressure foot lifting connecting rod 31 rotates to the clockwise direction of Fig. 1, pressure foot lifting drive link 32 is returned the place ahead, and presser feet 71 descends in slide 58 return action front positions.Between Q6-Q5, too, towards Q5 the time, rotate to the counter clockwise direction of Fig. 1, towards Q6 the time, rotate to clockwise direction by roller 43 pressure foot lifting connecting rods 31.That is, elliptical section Y2 is line falling cam part of the present invention and pressure foot lifting cam part.

In addition, why form circular arc between the Q4-Q5 of the 2nd cam 62, it be the reasons are as follows.Presser feet 71 rises and down maneuver substantially seldom continuously, is after for example descending, makes the motion flow that rises then.When roller 43 arrives Q4 or Q5 and presser feet 71 is risen, even impulse motor 80 stops, the rotation of its corresponding cam part 60 is stopped to produce the deviation of machinery, can be a little by Q4 or Q5.Owing to will form circular arc between the Q4-Q5, can prevent that also the action that descends from beginning even stop to postpone, rotating above Q4 or Q5.

The 1st cam 61 and the 2nd cam 62, as mentioned above, consider cut off suture, then carry out the action of pressure foot lifting and set mutual phase relation, chimeric pin 11a and roller 43 each be abutted against the position.Concrete is, at the angle between the P1-P7, between the P1-P2, between the Q1-Q7, between the Q1-Q2 all identical (angle ml), when chimeric pin 11a from P7 through P1 when P2 moves, roller 43 also moves to Q2 through Q1 from Q7 just.That is, in thread cutting action, presser bar lifting mechanisms 30 is failure to actuate.

In addition, roller 43 from Q3 to the action of the pressure foot lifting of Q4, chimeric pin 11a is displaced between the P3-P4 and tangent mechanism 10 is failure to actuate.Even when roller 43 was displaced between the Q5-Q6 and make presser bar lifting mechanisms 30 actions, because of chimeric pin 11a is displaced between the P5-P6, tangent mechanism 10 also was failure to actuate.In addition, when roller 43 was between Q4-Q5, chimeric pin 11a was between P4-P5.

In addition, on cam part 60, be provided with the zone (zone of being failure to actuate) of not transmitting the driving force of impulse motor 80 to any one mechanism of tangent mechanism 10, presser bar lifting mechanisms 30 and Unwinding line mechanism 50.That is, when chimeric pin 11a between the P2-P3 and roller 43 between Q2-Q3 the time, and, when chimeric pin 11a between the P6-P7 and roller 43 between Q6-Q7 the time, tangent mechanism 10, presser bar lifting mechanisms 30 and Unwinding line mechanism 50 all are failure to actuate.That is, between the P2-P3 of Fig. 8 (b) and the zone between the P6-P7, and between the Q2-Q3 of Fig. 8 (c) and the zone between the Q6-Q7, be the zone of being failure to actuate.

Below, be the action of tangent mechanism 10, presser bar lifting mechanisms 30 and the Unwinding line mechanism 50 at center with reference to Fig. 9 and Figure 10 explanation with cam part 60.Fig. 9 and Figure 10 are used to illustrate that with cam part 60 be the key diagram of the action at center.In addition, at this, illustrate that order by tangent mechanism 10, Unwinding line mechanism 50 and presser bar lifting mechanisms 30 makes the action of its action.

At first, begin thread cutting action from the state I shown in Fig. 9 (a).Under this state I, chimeric pin 11a is positioned on the arc sections X1 of cam path 61a of the 1st cam 61, and the arc sections Y1 of the cam surface 62a of roller 43 and the 2nd cam 62 is abutted against.

From this state I,, and cam part 60 is rotated to the clockwise direction of Fig. 1 and Fig. 9 because of impulse motor 80 rotates to positive direction (direction of the arrow F of Fig. 9).Chimeric pin 11a relatively moves along arc sections Y1 along arc sections X1, roller 43, but soon, chimeric pin 11a just is in the state I I that moves to arc sections X1 and the X2 of variable curvature portion boundary position (P7 of Fig. 8 (b)).

Since then, chimeric pin 11a begins to move in the X2 of variable curvature portion, and tangent mechanism 10 begins action.Then, when in a single day chimeric pin 11a was in the state I II (with reference to Fig. 9 (c)) of the central portion (P1 of Fig. 8 (b)) that arrives the variable curvature X2 of portion, movable cut part 15 was in the maximum mobile status of above-mentioned Fig. 2 (b).In addition, no matter state I I still is state I II, and roller 43 all moves in arc sections Y1, and presser bar lifting mechanisms 30 is failure to actuate.

Then, chimeric pin 11a enters P2 from P1 in the X2 of variable curvature portion, and in this process, movable cut part 15 is done the action of restoring, and catches upper thread and bottom line in its action way, and with fixed cutting tool parts 14 involutory cut-out upper thread and bottom lines.Then, chimeric pin 11a arrives the final position (P2) of the variable curvature X2 of portion, is in the state I V shown in Figure 10 (a).At this moment, the release of tangent mechanism 10.And cam part 60 continues to equidirectional rotation, and chimeric pin 11a is displaced between the P2-P3 of Fig. 8 (b) (zone of being failure to actuate), and roller 43 is displaced between the Q2-Q3 of Fig. 8 (c) (zone of being failure to actuate).Tangent mechanism 10, presser bar lifting mechanisms 30 and Unwinding line mechanism 50 all are failure to actuate at this moment.

Next, shown in Figure 10 (b), roller 43 arrives the elliptical section Y2 (the position Q3 of Fig. 8 (c)) (state V) of cam surface 62a, since then, 31 beginnings of pressure foot lifting connecting rod are rotated to the counter clockwise direction of Fig. 1 and Figure 10, and the rotation of the slide 58 of continuation Unwinding line mechanism 50, become the vertical motion of presser feet 71.Then, shown in Figure 10 (c), roller 43 is in the state VI that arrives between the Q4-Q5, and the rotational action of the slide 58 of Unwinding line mechanism 50 and the vertical motion of presser feet 71 finish, and this moment, the stop pulse motor 80.In addition, no matter state V still is state VI, owing to chimeric pin 11a moves along arc sections X1, so tangent mechanism 10 is failure to actuate.

Below, the electrical structure of the reinforcing seam sewing machine of present embodiment is described with reference to Figure 11.Figure 11 is the calcspar of electrical structure that is used to illustrate the reinforcing seam sewing machine of present embodiment.

Reinforce seam sewing machine, have: the controlling organization CPU (Central Processing Unit) 90 that is used for various devices such as drive controlling impulse motor 80, store the ROM (Read Only Memory) 91 of the various information of control data and program etc., the RAM (Random Access Memory) 92 of the data that storage is calculated according to the various data of reading from ROM91 or program by CPU90 etc., be used to import the guidance panel 93 of sewing condition etc., driving is used for the press button 94 of the cloth-pressing device 70 of compress material, make the starting switch 95 of making beginning, impulse motor 80, Spindle Motor 100 etc.

CPU90 as the working region, carries out various computings according to the graph data or the sewing program that are stored in the ROM91 with RAM92.Concrete is that according to the data of importing from the guidance panel that connects by not shown input interface, CPU90 carries out the selection and the change of stitch data.And, from the press button 94 that connects by not shown input interface and starting switch 95 input indicative signals the time, CPU90 is according to above-mentioned graph data, by not shown Output Interface Control impulse motor 80 and Spindle Motor 100, makes the operation of making that it stipulates.

Below, with reference to the concrete control action example of reinforcing seam sewing machine of explanation present embodiments such as flow chart.Figure 12 is the flow chart of control action that is used to illustrate the reinforcing seam sewing machine of the embodiment of the invention, and Figure 13 is control data (graph data) instance graph of control action that is used to control the reinforcing seam sewing machine of the embodiment of the invention.In addition, Figure 14 is to be the ideograph of central representation with the control action of the reinforcing seam sewing machine of the embodiment of the invention, with the amount of movement of tangent line connecting rod 11 and pressure foot lifting connecting rod 31.

The control action of the reinforcing seam sewing machine of the process description present embodiment of first usefulness Figure 12.At first, by the control of CPU90, the sign that determines impulse motor 80 direction of rotation is set at initial value, and (initial direction of rotation is set step: S1).Then, when the user has operated press button 94, CPU90 accepts the operation signal that sends from this press button 94, and driving pulse motor 80 also makes cam part 60 rotate, and makes the presser feet 71 of cloth-pressing device 70 descend, push down cloth (compress step: S2) by pressure foot lifting connecting rod 31 etc.

Subsequently, CPU90, the address setting of the graph data that will read from ROM91 is an initial value (data address initialization step: S3).And when the operator did not have pushbutton switch 94, CPU90 did not carry out the driving of impulse motor 80, waited until that directly press button 94 is operated.

Next, the user is in case operation is used to the starting switch 95 that begins to make, then accepted the CPU90 of operation signal from starting switch 95, (stitch data reads in step: S4), and make according to this stitch data just to read in the stitch data of the graph data that comprises ROM91.In addition, when the user did not have operation start switch 95, CPU90 did not read in stitch data, and waited for till starting switch 95 is operated.

Next, with the graph data of ROM91 in the continuous instruction of stitch data be " tangent line instruction " (for example, the data address 1056 of Figure 13 (a)) time, CPU90 driving pulse motor 80, and make cam part 60 pass through the state V of Figure 10 (b) from the state of the I of Fig. 9 (a), (the arrow F direction of Fig. 9 and Figure 10) state of rotating a little more in clockwise direction, and only make tangent mechanism 10 and Unwinding line mechanism 50 action (tangent line line falling steps: S5).

At this moment, the lower end 36a and being abutted against between the pin 73c of cloth-pressing device 70 that drive pin 36 owing to the presser feet at presser bar lifting mechanisms 30 are provided with the gap, so cam part 60 is under the state that the state V from Figure 10 (b) in clockwise direction rotates a little, the lower end 36a that presser feet drives pin 36 is not abutted against with the pin 73c that is abutted against of cloth-pressing device 70, and presser feet 71 does not rise.

In addition, with the graph data of ROM91 in the continuous instruction of stitch data be not " tangent line instruction " (for example, the data address 1001 of Figure 13 (a)) time, CPU90, other instructions (for example, sky send instruction) back in carrying out graph data (other instructs implementation step: S6), and interior address (the data address step of updating: S7) of renewal graph data, and return stitch data and read in step S4, continue to make operation.

After tangent line line falling step S5, CPU90, address (the data address step of updating: S8) of the graph data of renewal ROM91.When the instruction of following the tangent line instruction in the graph data, be " sewing finishing instruction " (for example, the data address 107C of Figure 13 (a)) time, CPU90 driving pulse motor 80, to the state VI of Figure 10 (b) rotating cam parts 60, make presser bar lifting mechanisms 30 actions (pressure foot lifting step: S9), and finish to make operation with this.

In addition, the instruction of the tangent line instruction in then graph data be not " sewing finishing instruction " (for example, " sky send data " of the data address 1057 of Figure 13 (a)) time, CPU90 only stops official hour with impulse motor 80, and (impulse motor stops step: S10).At this moment, cam part 60 is the states that rotate to clockwise direction a little from the V state of Figure 10 (b), and presser feet drives the lower end 36a of pin 36, and the pin 73c that is abutted against with cloth-pressing device 70 is not abutted against, and presser feet 71 does not rise.

Then, CPU90, sign counter-rotating (sign inversion step: S11) with decision impulse motor 80 direction of rotation, inversion pulse motor 80 makes cam part 60 reach the state I V of Figure 10 (a) and makes it stop back (impulse motor inversion step: S12), return other instruction implementation steps S6, continue to make operation.

When cam part 60 is in state I V from Figure 10 (a) to the state V of Figure 10 (b) time, as mentioned above, chimeric pin 11a is positioned between the P2-P3 of Fig. 8 (b) (zone of being failure to actuate), and roller 43 is positioned between the Q2-Q3 of Fig. 8 (c) (zone of being failure to actuate).Therefore, tangent mechanism 10, presser bar lifting mechanisms 30 and Unwinding line mechanism 50 all are failure to actuate.

As mentioned above, reading in step S4, tangent line line falling step S5, data address step of updating S8 and pressure foot lifting step S9 through stitch data and finish to make the control action of operation, is " the 1st control model " among the present invention.The 1st control model, no matter just commentaries on classics, the counter-rotating with impulse motor 80 can realize.This is because the X2 of tangential cam portion, the line falling cam part and the pressure foot lifting cam part Y2 of the 2nd cam 62 of the 1st cam 61 of cam part 60, is irrelevant each the same symmetrical shape that turns to of the action of tangent mechanism 10, Unwinding line mechanism 50 and presser bar lifting mechanisms 30 and impulse motor 80.

On the other hand, read in step S4, tangent line line falling step S5, data address step of updating S8, impulse motor through stitch data and stop step S10, sign inversion step S11 and impulse motor inversion step S12, proceeding to make the control action of operation, is " the 2nd control model " among the present invention.

Shown in Figure 13 (a) is to be used to be implemented in according to a stitch data carried out after initial the making, do not made the presser bar lifting mechanisms action, makes and finish to make the graph data of the control action of operation (A) and carry out the next one according to other stitch datas.In addition, be the graph data (B) that is used to realize making and finishing to make the control action of operation shown in Figure 13 (b) according to a stitch data.

With the graph data (A) shown in Figure 13 (a), can realize that not residual line ground carries out X and reinforces operation, or on cloth, follow closely the operation of 4 hole buttons.When realizing graph data (A), read in step S4, tangent line line falling step S5, data address step of updating S8 through stitch data shown in Figure 12, impulse motor stops step S10, sign inversion step S11 and impulse motor inversion step S12 makes operation (realization of the 2nd control model) continuously.Subsequently, read in step S4, tangent line line falling step S5, data address step of updating S8, pressure foot lifting step S9 and finish to make operation (realization of the 1st control model) through stitch data.At this moment, the 1st control model drives under the state that the direction of rotation of impulse motor 80 is reversed, and can realize the 1st control model.

On the other hand, common reinforcing operation can use the graph data (B) shown in Figure 13 (b) to realize.When the graph data of realizing shown in Figure 13 (b) (B), read in step S4, tangent line line falling step S5, data address step of updating S8 and pressure foot lifting step S9 and finish to make operation (realization of the 1st control model) through stitch data shown in Figure 12.

Cam part 60 the rotate a circle amount of movement of tangent line connecting rod 11 of (0 °～360 °) and the amount of movement of pressure foot lifting connecting rod 31 have been represented to Figure 14 pattern.In Figure 14, " cam starting point " corresponding to the state I of Fig. 9 (a), " tangent line starting point " corresponding to the state I I of Fig. 9 (b), " the most preceding point of tangent line " corresponding to the state I II of Fig. 9 (c), " tangent line end point " is corresponding to the state I V of Figure 10 (a).In addition, " slide starting point " corresponding to the state V of Figure 10 (b), " presser feet is gone up point most " is corresponding to the state VI of Figure 10 (c).

Figure 14＜example A be pattern be illustrated in and carry out not residual line ground and carry out X and reinforce operation, or on cloth the control action the during operation of nail 4 hole buttons, it can be with the realization of the graph data (A) as Figure 13 (a) shown in.This＜example A in, at first, carry out stitch data shown in Figure 12 and read in step S4, tangent line line falling step S5, data address step of updating S8 and impulse motor and stop step S10.Stop the moment that step S10 finishes at impulse motor, cam part 60 is in the state corresponding to " the slide end point " of Figure 13.

So-called state corresponding to " slide end point ", mean the state that rotates a little to clockwise direction from the state V of Figure 10 (b), when cam part 60 is positioned at this position, finish the spinning movement of the slide 58 of Unwinding line mechanism 50, the presser feet 71 of cloth-pressing device 70 is in the state that does not also rise in addition.Why this state drives being abutted against of the lower end 36a of pin 36 and cloth-pressing device 70 by the presser feet at presser bar lifting mechanisms 30 and is provided with the gap between the pin 73c and becomes possibility, is as mentioned above.

Next, identify inversion step S11 and impulse motor inversion step S12, make impulse motor 80 counter-rotatings from this " slide end point " with this.In the moment that is through with impulse motor inversion step S12, cam part 60 is in corresponding to the state of " the slide starting point " of Figure 14 (the state V of Figure 10 (b)).

Then, by the impulse motor 80 of counter-rotating, read in step S4, tangent line line falling step S5, data address step of updating S8 and pressure foot lifting step S9 through stitch data and finish to make operation.In the moment that is through with pressure foot lifting step S9, cam part 60 is in corresponding to the state of " presser feet is gone up point most " of Figure 14 (the state VI of Figure 10 (c)).

Figure 14＜example B be pattern be illustrated in control action when carrying out common reinforcing operation, it can be with the realization of the graph data (B) as Figure 13 (b) shown in.This＜example B in, read in step S4, tangent line line falling step S5, data address step of updating S8 and pressure foot lifting step S9 finishes to make operation through stitch data.In the moment that finishes pressure foot lifting step S9, cam part 60 is in corresponding to the state of " presser feet is gone up point most " of Figure 14 (the state VI of Figure 10 (c)).

On the reinforcing seam sewing machine of present embodiment, owing to just can stagger and carry out thread cutting action, line falling action and 3 actions of pressure foot lifting action of machinery continuously, so there is no need to be provided with respectively as in the past and the driving mechanism that control drives tangent mechanism 10 (reaching presser bar lifting mechanisms 30) respectively, the mechanism of driving Unwinding line mechanism 50 with a CD-ROM drive motor (impulse motor 80).Therefore, can make tangent mechanism 10, presser bar lifting mechanisms 30 and Unwinding line mechanism 50 always by regular hour point action.

Particularly, in the present embodiment, the lower end 36a and being abutted against between the pin 73c of foot device 70 that drive pin 36 owing to the presser feet at presser bar lifting mechanisms 30 are provided with the gap, so can not carry out the action of line falling action and pressure foot lifting simultaneously, and time delay when total energy is stable when keeping from the line falling release to pressure foot lifting action beginning.

In addition, because on the reinforcing seam sewing machine of present embodiment, the driving mechanism that drives tangent mechanism 10, presser bar lifting mechanisms 30 and Unwinding line mechanism 50 is a CD-ROM drive motor (impulse motor 80), so there is no need to be provided with respectively as in the past the driving mechanism that drives tangent mechanism 10 and presser bar lifting mechanisms 30, the mechanism that drives Unwinding line mechanism 50.Therefore, can reduce the Sewing machines cost.

In addition, because on the reinforcing seam sewing machine of present embodiment, the line falling cam part of the X2 of tangential cam portion of the 1st cam 61 and the 2nd cam 62 and pressure foot lifting cam part Y2, formed the symmetric shape that to do same action of the irrelevant to rotation direction of the action of tangent mechanism 10, Unwinding line mechanism 50 and presser bar lifting mechanisms 30 and impulse motor 80, so no matter impulse motor 80 to positive and negative which direction rotates, and can carry out identical thread cutting action, line falling action and pressure foot lifting action.Therefore, can realize the slick and sly operation of making.

In addition, because on the reinforcing seam sewing machine of present embodiment, possess and to switch flexibly and realize making impulse motor 80 according to tangent mechanism 10, the 1st control model of the direction of rotation rotation of the sequentially-operating of Unwinding line mechanism 50 and presser bar lifting mechanisms 30, and make impulse motor 80 according to tangent mechanism 10, after the direction of rotation rotation of the sequentially-operating of Unwinding line mechanism 50 and presser bar lifting mechanisms 30, before making presser bar lifting mechanisms 30 action, impulse motor 80 is rotated round about and make the position of rotation of impulse motor 80 be positioned at the controlling organization CPU90 of the 2nd control model in the zone of being failure to actuate, so can carry out making operation reliably corresponding to various situations.

Therefore, for example, carry out as with (with reference to Figure 14＜example A 〉) 4 hole Button nails are on the cloth time in hope, be not moved upward the presser feet 71 of cloth-pressing device 70 and when intactly keeping cloth to make operation continuously, at first, by realize the 2nd control model with CPU90, forming the action that initial stitching makes tangent mechanism 10 and 50 actions of Unwinding line mechanism and inhibition presser bar lifting mechanisms 30 later on, then, by realize the 1st control model can forming next stitching by CPU90.Therefore, owing to can not produce the discomfort that makes cloth offset that the presser feet 71 of cloth-pressing device 70 is moved upward, causes etc. because of presser bar lifting mechanisms 30 action, so can realize making the high efficiency of operation.

In addition, when not wishing to form the line that is connected between initial stitching and the next stitching for outward appearance, also at first, by realize the 2nd control model by CPU90, only make tangent mechanism and the action of Unwinding line mechanism later at the initial stitching of formation, and the action of inhibition presser bar lifting mechanisms 30, then, can form next stitching by realize the 1st control model by CPU90.Therefore, owing to do not form the line that is connected between initial stitching and the next stitching, so can improve the quality of sewings.

In addition, the present invention is not limited to the foregoing description certainly, can suitably change certainly.For example, when the action of the Unwinding line mechanism 50 that continues does not make presser bar lifting mechanisms 30 actions (the 2nd control model), the position of rotation of the impulse motor 80 when driving Unwinding line mechanism 50 with CPU90 control, and the hunting range of slide 58 can be changed to than the little scope of scope with spacer pin 54 restrictions.

Promptly, as mentioned above, spacer pin 54, be limit slippage sheet 58 along with the action of presser bar lifting mechanisms 30, do the parts that surpass needed swing, but the action at the Unwinding line mechanism 50 that continues does not make in the 2nd control model of presser bar lifting mechanisms 30 actions, can control the amount of movement of pressure foot lifting drive link 32 by the control of CPU90, the swing of slide 58 be stopped before the restriction that is subjected to spacer pin 54, can change the movable area of slide 58 with this.In addition, can set the movable area of this moment with guidance panel 93.That is, CPU90 has the function of the movable area change mechanism of slide 58 movable area that change Unwinding line mechanism 50.

Owing to possess the CPU90 of such movable area change mechanism, can be according to the thickness of the thickness of the cloth of implementing to make or the suture that is used to make etc., suitably set the movable area of slide 58.Therefore, can suppress slide 58 swings unnecessary and shorten the slide required time of 58 swings, improve sewing efficiency.

(invention effect)

According to above-mentioned invention, because with a CD-ROM drive motor, just can stagger and carry out 3 actions such as thread cutting action, line falling action and pressure foot lifting action of machinery continuously, so there is no need as in the past to be provided with respectively and control drives tangent mechanism (and presser bar lifting mechanisms) respectively driving mechanism, drive the mechanism of Unwinding line mechanism.Therefore, tangent mechanism, Unwinding line mechanism and presser bar lifting mechanisms are always moved by the regular hour.Consequently can prevent the delay of cycle period.

In addition, according to the present invention 1, owing to the driving mechanism that drives tangent mechanism, presser bar lifting mechanisms and Unwinding line mechanism is a CD-ROM drive motor, so there is no need to be provided with respectively the driving mechanism that drives tangent mechanism (and presser bar lifting mechanisms), the driving mechanism that reaches driving Unwinding line mechanism.Therefore, can reach and reduce the Sewing machines cost, make its miniaturization, lightweight.

And, can carry out making operation reliably corresponding to various situations.

For example, carry out as with 4 hole Button nails are on the cloth time in hope, when not being moved upward the presser feet of cloth-pressing device and intactly keeping cloth to make operation continuously, at first, realize the 2nd control model, form the stitching that passes two button holes with this with controlling organization, make the action of tangent mechanism and Unwinding line mechanism also suppress the action of presser bar lifting mechanisms simultaneously subsequently, then, realize the 1st control model, form the stitching that passes two remaining holes with this with controlling organization.

Therefore, owing to can not produce because of the presser bar lifting mechanisms action makes the presser feet of cloth-pressing device be moved upward the discomforts such as cloth offset that cause, so can realize making the high efficiency of operation.

In addition, when not wishing to form the line that is connected between initial stitching and the next stitching for outward appearance, also at first, realize the 2nd control model by controlling organization, and only make the action of tangent mechanism and Unwinding line mechanism later on forming initial stitching with this, and the action of inhibition presser bar lifting mechanisms, then, can form next stitching by realize the 1st control model by controlling organization.Therefore, owing to do not form the line that is connected between initial stitching and the next stitching, so can improve the quality of sewings.

And then, can suppress slide swing unnecessary and shorten the required time of slide swing, improve sewing efficiency.

Claims (7)

1. Sewing machines, have: possess and be used for making the tangent mechanism that cuts off the movable cutting edge of the suture that links to each other with eedle below the thing, make the presser bar lifting mechanisms that rises from the presser feet of making above the thing by the elastic force compress, intersecting and be displaced into eedle and make on the suture path between the thing and have making thing and draw Unwinding line mechanism with the line falling sheet of the suture of tangent mechanism cut-out, it is characterized in that having:

Single CD-ROM drive motor and

With described CD-ROM drive motor interlock and can rotate and possess variation by rotatable phase make described tangent mechanism action tangential cam portion the 1st cam and

With described CD-ROM drive motor interlock and can rotate and possess variation by the rotatable phase of the phase difference that has regulation with respect to described the 1st cam make the line falling cam part of described Unwinding line mechanism action and make by the variation of described rotatable phase described presser bar lifting mechanisms action the pressure foot lifting cam part the 2nd cam and

For the described tangential cam portion that connects described the 1st cam and the 1st attaching parts that described tangent mechanism disposes and

The 2nd attaching parts that dispose for the described line falling cam part that connects described the 2nd cam and described pressure foot lifting cam part and described Unwinding line mechanism and described presser bar lifting mechanisms;

The phase difference of the described regulation of described the 1st cam and described the 2nd cam is formed in the structure that makes described Unwinding line mechanism and presser bar lifting mechanisms action by the rotation of described CD-ROM drive motor, by described tangent mechanism end thread cutting action later on again.

2. Sewing machines according to claim 1 is characterized in that:

The positive and negative rotation of described CD-ROM drive motor energy,

The described tangential cam portion of described the 1st cam, the described line falling cam part and the described pressure foot lifting cam part of described the 2nd cam are formed the action of described tangent mechanism, described Unwinding line mechanism and described presser bar lifting mechanisms and the shape of the identical difference symmetry of the irrelevant to rotation direction of described CD-ROM drive motor.

3. Sewing machines according to claim 2 is characterized in that:

Described the 1st cam and described the 2nd cam,

Be configured to the zone of being failure to actuate that any one mechanism of the described tangent mechanism of clamping, described Unwinding line mechanism and described presser bar lifting mechanisms all is failure to actuate,

And possesses controlling organization, this controlling organization can switch and realize flexibly: to make described tangent mechanism, described Unwinding line mechanism and described presser bar lifting mechanisms rotate by the direction of rotation of this sequentially-operating described CD-ROM drive motor the 1st control model and after making described tangent mechanism and described Unwinding line mechanism rotate described CD-ROM drive motor and before making the action of described presser bar lifting mechanisms by the direction of rotation of this sequentially-operating to the described CD-ROM drive motor of counter-rotation and make the position of rotation of described CD-ROM drive motor be positioned at the 2nd control model in the described zone of being failure to actuate.

4. Sewing machines according to claim 3 is characterized in that:

When possessing the described Unwinding line mechanism action in described the 2nd control model, the movable area change mechanism of the movable area of the described line falling sheet of the described Unwinding line mechanism of change.

5. Sewing machines according to claim 1 and 2 is characterized in that:

Described the 1st cam and the 2nd cam are disposed separatedly and are fixed on the output shaft of CD-ROM drive motor along axis direction.

6. Sewing machines according to claim 5 is characterized in that:

Described the 1st cam and the 2nd cam integrally are located on the cam part on the output shaft that is fixed in CD-ROM drive motor.

7. Sewing machines according to claim 1 and 2 is characterized in that:

Described the 2nd cam forms described line falling cam part and pressure foot lifting cam part according to this by direction of rotation.

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