CN1153862C

CN1153862C - Buttonhole machine

Info

Publication number: CN1153862C
Application number: CNB001357239A
Authority: CN
Inventors: 洼田次勇; 一; 澁谷彰一
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 1999-12-17
Filing date: 2000-12-18
Publication date: 2004-06-16
Anticipated expiration: 2020-12-18
Also published as: DE10063002B4; CZ20004721A3; DE10063002A1; CN1300890A; JP2001170385A

Abstract

To form buttonhole sewing seams of fine finish in a sewn material by easily changing the tension of a needle thread and a looper thread forming the buttonhole sewing seams, to the desired thread tension. The buttonhole sewing machine is provided with a needle thread tension regulator disposed in a path of a needle thread to electrically regulate tension load to the needle thread, a looper thread tension regulator disposed in a path of a looper thread to electrically regulate tension load to the looper thread, and a control means for controlling the needle thread tension regulator and the looper thread tension regulator according to the tightness of stitches to change the tension of the needle thread and looper thread.

Description

Sewing machine for binding buttonhole

Technical field

The present invention relates to a kind of sewing machine for binding buttonhole that on sewing, forms the eyelet buttonhole, relate in particular to the sewing machine for binding buttonhole that has for the thread tension generating means that carries out the automatic locking buttonhole.

Background technology

In the past, at men's wear, dress, Work Clothes on the clothes such as jean, forms the sewing machine for binding buttonhole of the buttonhole of being made up of line part and hole portion with chain-type stitch, has as Figure 11～structure shown in Figure 14.

As shown in figure 11, sewing machine for binding buttonhole 1 has: shank is driving mechanism 2 up and down, on the fixing cloth pushing table that does not show in the drawings and be provided with the shank 11 of eedle 12 in the bottom, the line shuttle pedestal 3 that has the line shuttle, for forming the eedle swing mechanism that does not show among the figure that double diagonal stitch swings eedle, the cloth pushing table device that does not show among the figure, supply with the thread take-up tension lever 4 of upper thread to eedle 12, upper thread adjusting device 5, make shank 11 rotations and make the rotation of shank 11 and the synchronous rotating mechanism 7 of rotation of line shuttle, the thread-laying mechanism of boost line shuttle (diagram is omitted) etc.

Shank 11, the chain-drive section of the sewing machine stand that does not show in the drawings with extension state setting vertically, by the drive source that does not show among the figure, for example the driving of electrical motor of sewing machine make itself and rotary main shaft (not showing among the figure) interlock and by shank up and down driving mechanism 2 make its knee-action.

And shank 11 is driven by the needle bar swinging mechanism that does not show among the figure that is arranged in the head, has the structure that eedle 12 is all swung at every 1 pin down of needle falling point.Moving up and down and combining with the swing of eedle of this shank 11 is arranged on the line shuttle driving mechanism that does not show among the figure in the board in addition and makes the action of line shuttle, carries out eyelet according to both coordinations along buttonhole.

The fixing cloth pushing table of sewing by the driving of the cloth-feeding device of stepper motor etc., carries out work feed along the buttonhole shape that cuts out and drives.And, not showing among the figure, board is provided with the cloth-cutting apparatus of being made up of cutting knife and hammer body, and the institute when buttonhole forms on sewing by this device fixes time and a little cuts out buttonhole.

Thread take-up tension lever 4 is the mechanisms that supply with upper thread Y1 to the eedle 12 that is arranged on shank 11 lower ends, moving up and down along with shank 11, by thread take-up tension lever 4 shake with by upper thread adjusting device 5 quantitative upper thread Y1 derive, send to eedle 12 by shank 11.

Upper thread adjusting device 5, have by a pair of relatively to the auxiliary upper thread regulating element 52 formed of discoid body, by a pair of relatively to the upper thread regulating element 53 formed of discoid body, shank line guiding mechanism 55, feed adjustment bar 56, it is set up on the path of the thread supplying apparatus that do not show in the drawings and the line between the shank 11.

This feed adjustment bar 56 is that the driving by shank 11 and thread take-up tension lever 4 moves up and down, and transfers out the mechanism from the upper thread of upper thread regulating element 53.And feed adjustment bar 56 shakes when not making, and will apply very that a pair of discoid body of the upper thread regulating element 53 of hightension separates to the upper thread Y1 that inserts suture needle, discharges upper thread Y1.Then, only make auxiliary upper thread regulating element 52 become the parts that apply tension force to upper thread Y1, easy of like this shank 11 conveying upper thread Y1.

Auxiliary upper thread regulating element 52, upper thread regulating element 53 has

tension dial

52a, 53a respectively, by rotating this 2

tension dial

52a, 53a, the length of upper thread and the tension force of upper thread can be determined in the interval between the discoid body of other subtend of branch that adjustment upper thread Y1 passes through.

2 line shuttles are arranged on, the top of the line shuttle pedestal 3 that is provided with in the framework of the board bottom of the fuselage that does not show in the drawings and the position of shank 11 vertical lower.

These 2 line shuttles are connected by rotating mechanism 1 with shank 11 with the line shuttle pedestal 3 of hookup wire shuttle, rotate around vertical rotating shaft synchronously with line shuttle pedestal 3 with shank 11.

When this is the hole portion of making buttonhole on the sewing (the semicircle shape part of circle shape hole, buttonhole place portion) for making stitching become radial mechanism.The line shuttle that constitutes as above-mentioned structure is with the swing synchronization action of the moving up and down and eedle of shank 11, like this and eedle 12 coordinations buttonhole on the sewing that is placed on the cloth pushing table.

In the line shuttle, import the bottom line guide formation of bottom line, as Figure 13 and shown in Figure 14, roughly by on the line shuttle pedestal 3 that is provided with the line pilot hole on top, upper and lower settings has the bottom line axis of

guide

32,33, the bottom line that is fixed on the bottom line axis of guide 32 passes through spring 35, be arranged on the downside bottom line axis of guide 33 belows, and regulate the sliding embedding of line adjusting rod of dial (tension dial) 36 with having line, the bottom line regulating element of being made up of a pair of discoid body of line regulating spring 36a pressurization 37 constitutes simultaneously.

At this,, the path of the upper thread Y1 that derives from the tip of eedle 12 is described with reference to Figure 11 and Figure 12.

Upper thread Y1, derive from upper thread feedwaies such as spirals, through auxiliary upper thread regulating element 52, upper thread regulating element 53, shank line guiding mechanism 55, feed adjustment bar 56, thread take-up tension lever 4 enters from the upper end of shank 11, and the outlet opening 11a from forming in shank 11 bottoms as shown in figure 12 derives outside, and by line adjustment disk 13, line guide part 14, line pilot hole 14a arrives the pin hole of eedle 12.

And, bottom line Y2 with the upper thread buttonhole, bottom line guiding mechanism 38 in the machine frame that does not show in the drawings is installed enters the thread-laying mechanism driving shaft 39 of the thread-laying mechanism that does not show the driving figure, as Figure 13 and the outlet 39a from thread-laying mechanism driving shaft 39 shown in Figure 14, by the bottom line axis of

guide

32,33 on the online shuttle pedestal 3 is installed, turn back at bottom line regulating element 37 places once more through the bottom line axis of guide 33, the bottom line axis of guide 32, by bottom line by spring 35 leading line shuttles.

And, as shown in figure 13, on the online shuttle pedestal 3, for carrying bottom line Y2, the process bottom line passes first end 34a by the bottom line Y2 of spring 35, also be provided with the conveying crank connecting link 34 that first end 34a is shaken by connecting

rod

34b, 34c etc., measure conveying bottom line Y2 in accordance with regulations by shaking of this conveying crank connecting link 34 to the line shuttle.

In addition, above-mentioned sewing machine for binding buttonhole is to change the tension force of its upper thread and bottom line; make the stitching or the pine of making; or tight outward appearance resemble single line, by adjusting arbitrarily between the stitching of this pine and tight stitching, forms stitching corresponding to the purposes and the appearance design of sewing.

And, also be retractility corresponding to the employed suture of sewing, or the different complicated factors of mantle friction opposing.

Consider these situations, for providing suitable line tension, in sewing machine for binding buttonhole in the past, the thread path that upper thread Y1 arrives eedle 12 is through boost line regulating element 52, line regulating element 53, shank line guiding mechanism 55, feed adjustment bar 56, thread take-up tension lever 4, the line from shank 11 bottoms exports 11a and warp adjustment disk 13, the path of the complexity of line guide part 14 again.And, path from the coil of wire of bottom line Y2 to the line of line shuttle, as Figure 11～shown in Figure 14, by bottom line guiding mechanism 38, thread-laying mechanism driving shaft 39, the bottom line axis of

guide

32,33, bottom line is adjusted element 37 and is turned back, through the bottom line axis of

guide

32,33, bottom line constitutes by the path of passing through complexity of spring 35.

Then, these upper threads Y1 and bottom line Y2 the adjustment of tension force, carry out respectively by the operator, promptly for upper thread Y1, rotate the tension dial 52a of the boost line regulating element 52 of decision upper thread length, the tension dial 53a of the line adjustment dish 53 of decision upper thread tension force, and for bottom line Y2, rotate the tension dial 36 of bottom line regulating element 37 and carry out.

But, on sewings such as clothing, carry out the part of buttonhole, in the end of clothing, and because setting fastening and trip and need reinforce buttonhole, at this moment sewing is in folding or overlapping state, and its thickness and hardness are also just inhomogeneous.

But, for above-mentioned sewing machine for binding buttonhole, the operator will be by difference rotating

tension dial

52a, 53a, 36 before making, adjust the tension force of change upper thread Y1 and bottom line Y2, the tension force of change upper thread Y1 and bottom line Y2 is adjusted in the sewing thickness of each one of like this can not be in making corresponding buttonhole stitching and the change of hardness.

That is, carry out the thickness of sewing at each position of buttonhole and the state of hardness on can not corresponding sewing and adjust the tension force of line, so can not lock out good-looking stitching.

And as shown in figure 15, making by sawtooth stitching G1 of portion on the straight line and the sawtooth stitching G2 of portion on the circular arc of buttonhole formed, and its stitching direct of travel turns round halfway, and in this place, the length of each stitching is all had some change.Evenly fastening for making at the suture of the part that comprises this stitching, just necessary rotating

tension dial

52a, 53a, 36 of operator in making, this operation is very difficult.

Summary of the invention

The present invention makes in view of the above fact, and its objective is provides a kind of upper thread of formation buttonhole stitching and tension force of bottom line of making to change automatically by desirable line tension, can form the sewing machine for binding buttonhole of good-looking stitching buttonhole on sewing.

For the present invention's of solving above-mentioned problem 1 sewing machine for binding buttonhole is, make the moving up and down shank 11 of eedle that is arranged on the bottom, with be provided with in the lower parts of needle subtend and with moving up and down synchronously driven line shuttle 30 coordinations of described shank, carry out the sewing machine for binding buttonhole of buttonhole along the buttonhole of sewing with chain-type stitch, it has: be arranged on the upper thread tension force generating means 50 that can adjust the tension load of this upper thread on the path of the upper thread that imports described shank by electricity; Be arranged on the bottom line tension generating means 8 that to adjust the tension load of this bottom line on the bottom line path that imports described line shuttle by electricity; The elasticity of corresponding suture is controlled the control device of described upper thread tension force generating means and bottom line tension generating means; Control described two tension force generating means by described control device, change the tension force of described upper thread and bottom line, can change the elasticity of the buttonhole stitching suture that stitches.

1 sewing machine for binding buttonhole according to the present invention, because adjustment by described upper thread tension force generating means and bottom line tension generating means, make along the upper thread of sewing buttonhole part buttonhole and the tension force of bottom line and can electricity consumption adjust, so, unlike previous technologies, without tension determining apparatus and instrument, just can easily regulate the tension force of upper thread and bottom line, so that can change the elasticity that forms the stitching suture.

Therefore, can easily form the preparation that the buttonhole stitching is made operation, make the preparation of making operation increase substantially efficient and shortening time.

And because by described upper thread tension force generating means and bottom line tension generating means, the tension force of can electricity consumption adjusting upper thread and bottom line changes the elasticity of buttonhole stitching suture, can form buttonhole by the stitching of desirable line elasticity.

That is,, in the time of can easily realizing making suture on the sewing lax, form the soft stitching of outward appearance, when making suture on the sewing fastening, form the hard stitching of outward appearance by the elasticity that described upper thread tension force generating means and bottom line tension generating means are regulated suture.And, according to sewing, for example, adjust corresponding to the thickness and the hardness at the sewing place of making corresponding to the eyelet buttonhole, that is, according to the adjusting of carrying out for the elasticity of concrete per 1 needlework mark, the correspondence place of making can easily form the good zigzag chain stitch of outward appearance.

And, because by described upper thread tension force generating means and bottom line tension generating means, electricity consumption can be adjusted the tension force of suture, and the stitching that forms buttonhole with this sewing machine for binding buttonhole is not single stitching, and the buttonhole that can sew user's uniqueness is made stitching.

And, be applicable to that the dual chain-type stitch of buttonhole is easy to burst at the seams, owing to can change finally the knot balance of tension force of the upper thread of suture and bottom line of formation respectively, the position that knots of changing these upper threads and bottom line can make final sewing line be not easy to burst at the seams.

And, because by described upper thread tension force generating means and bottom line tension generating means, the tension force of the suture when the electricity consumption adjustment is not made, can change the tension force of suture, so can be when not making the tension adjustment of suture low, different with line adjusting device in the past, need not be arranged on and make feed adjustment bar that the line regulating element that applies high-tension separates and auxiliary suture regulating element etc. when not making.

But for preventing to make eedle is curved or breaks by will push down suture to the processing of sewing with when making, the line length of staying at eedle place must be stayed weak point when beginning to make.On the other hand, to strain suture when beginning to make, so when beginning to make, must carry more lines.

Therefore, habitually in the past, the transport that suture must be arranged, but according to the present invention, the enough tension force of tension suture, promptly, owing to can be adjusted to the alap tension force that suture is carried easily, thus just do not need the transport of suture and suture feed adjustment bar etc., simultaneously, can cut down component parts significantly than in the past Sewing machines, reduce the cost and improve reliability.

At this, as the eyelet buttonhole, the concrete stitching of making along the position that forms buttonhole on the sewing exactly etc.

The present invention's 2 is included in the present invention's 1 the sewing machine for binding buttonhole, and described buttonhole drips the eye of shape and the buttonhole of forming with the continuous straight hole portion of one end by circle; The stitching of described buttonhole is formed at line part that forms about described straight hole portion and the hole portion that forms around the hole at least; Described control device is the part to each described buttonhole stitching, can opposite line tension generating means and the bottom line tension generating means in the device controlled of at least one side.

2 sewing machine for binding buttonhole according to the present invention, can access and the present invention's 1 same effect, described control device of while, by at least one side in upper thread tension force generating means and the bottom line tension generating means, for example, for a buttonhole, regulate the tension force of the bottom line of upper thread for each part that constitutes this buttonhole, can change the elasticity of the suture of these parts.So, not same thickness and hardness even carry out the part of buttonhole on the sewing, can be enough form zigzag chain stitch corresponding to the elasticity of the suture of these situations, so just can sew the good buttonhole of desirable outward appearance.

The present invention's 3, be included in the present invention 1 or 2 sewing machine for binding buttonhole in, also have with described control device and be connected, part to each described buttonhole stitching, the thread tension setting operating means that opposite line tension and bottom line tension can be set respectively, described control device can be controlled described two tension force generating means, makes the setting tension force that constitutes this thread tension setting operating means.

3 sewing machine for binding buttonhole according to the present invention, can access with the present invention 1 or 2 same effects, be connected owing to having simultaneously with control device, part to each described buttonhole stitching, the thread tension setting operating means that opposite line tension and bottom line tension can be set respectively, so, change corresponding to interval in each part, the thickness of sewing, make direction, sewing speeds etc. can easily be set the thread tension of necessity by described thread tension setting operating means.Like this, can carry out the bight of desired outward appearance.

Description of drawings

Fig. 1 is the structure chart of the main portion of Sewing machines that shows the sewing machine for binding buttonhole suture path of the present invention's one example.

Fig. 2 is the stereogram that shows the rotating shuttle pedestal in bottom line path in the Sewing machines of Fig. 1.

Fig. 3 is the enlarged drawing on rotating shuttle pedestal top.

Fig. 4 is the phantom of the 1st line tension bringing device 200 main portions.

Fig. 5 is the 2nd line tension bringing device figure of the variation of the upper thread adjusting device 50 of Fig. 4 and bottom line adjusting device 8, (a) line that can apply the rotary body of tension force to the suture of Sewing machines is taken turns as the hysteresis brake that is arranged on the electromagnetic brake on the spinner member axle, apply the phantom of main portion of the device of line tension, (b) be the phantom of hysteresis brake internal structure.

Fig. 6 is sewing machine for binding buttonhole control calcspar.

The control calcspar of Fig. 7 when making according to the sewing machine for binding buttonhole that drives present embodiment sends the time diagram of signal.

Fig. 8 is the front view of guidance panel.

Fig. 9 sets the flow chart of line regulating element with guidance panel for explanation.

Figure 10 is each station diagram of the eyelet buttonhole of reality.

The thread path figure of Figure 11 sewing machine for binding buttonhole in the past.

Figure 12 is a main enlarged drawing of same sewing machine needle bar 11 bottoms, (a) is front view, (b) is side view.

Figure 13 is the stereogram of the line shuttle pedestal that shows the bottom line path of same Sewing machines.

Figure 14 is the sketch map in the bottom line path of past line shuttle direction in the same Sewing machines.

Figure 15 is for forming the figure that handles the needle of buttonhole stitching on the sewing.

Among the figure: 3-line shuttle pedestal, 8-bottom line adjusting device (bottom line tension generating means), 9-guidance panel (thread tension setting operating means), the 10-sewing machine for binding buttonhole, 11-shank, 30-line shuttle, 50-upper thread adjusting device (upper thread tension force generating means), 90-thread tension setting portion, 100-CPU (control device), 101-ROM (control device), 102-RAM (control device), 103-X carries counter (control device), and 104-Y carries counter (control device), 105-revolution meter (control device), 108-inserts controller (control device), 109-interface (control device), 200-the 1st line tension bringing device (upper thread tension force generating means, the bottom line tension generating means), 300-the 2nd line tension bringing device (upper thread tension force generating means, the bottom line tension generating means), 910-setting section selection portion, 920-datum line tension force input part, 921-datum line tension force input part, 930-individual wire tension force input part, 931-position line tension input part, the H-buttonhole, Y1-upper thread, Y2-bottom line.

The specific embodiment

Below, the embodiment of sewing machine for binding buttonhole of the present invention is described based on Fig. 1～Figure 10.

Sewing machine for binding buttonhole 10 is by shank 11 be arranged on line shuttle 30 on the line shuttle pedestal 3 of shank 11 belows and the coordination of the thread-laying mechanism (omitting among the figure) of boost line shuttle 30 forms the buttonhole that is made of line part and hole portion on the sewing that is placed on the cloth pushing table.

As shown in Figure 1, sewing machine for binding buttonhole 10 has: shank is driving mechanism 2 up and down, be provided with the shank 11 of eedle 12 in its underpart, the line shuttle pedestal 3 that has the line shuttle, for forming the eedle swing mechanism that does not show among the figure that the zigzag stitching swings shank 11, the cloth pushing table device that does not show among the figure, supply with the thread take-up tension lever 4 of upper thread to eedle 12, bottom line adjusting device (bottom line tension generating means) 8, also make the rotation of shank 11 and the synchronous rotating mechanism 7 of rotation of line shuttle pedestal 3 when making shank 11 rotations, constitute the upper thread adjusting device 50 of tension force generating means.

At first, to the moving up and down driving mechanism up and down 2 of shank 11 is described.

Driving mechanism 2 has about the shank: belt pulley 21, and gear 22, shank driving cam 23 connects connecting rod 24, the moving up and down crank connecting link 25 of shank, the moving up and down fork 25a of shank, shank moves connecting rod 26 etc. up and down.

Belt pulley 21 is fixed on the axle 28 that can be installed in (omitting among the figure) in the frame with rotating freely, and with the drive source that does not show among the figure, for example, electrical motor of sewing machine directly or by belt connects.This electrical motor of sewing machine is controlled its rotation by the control circuit that does not show among the figure, and the drive pulley 21 by this electrical motor of sewing machine is that rotate in the direction of arrows at the center with axle 28.

Gear 22 is fixed on the axle 28 with the thread take-up tension lever driving cam 41 of drive pulley 21 and aftermentioned thread take-up tension lever 4.

Shank driving cam 23, has gear part 23a with gear 22 interlocks, with the 23b of eccentric cam portion that becomes one with this gear part 23a,, and be that the center can be installed on the 23d with rotating freely with an axle 23d who is arranged on abreast in the frame with axle 28 on the top of axle 28.The 23b of this eccentric cam portion is provided with the connection connecting rod 24 that is shaken by the rotation of shank driving cam 23, and this connects connecting rod 24, moves rotatable being coupling of an end 25b of crank connecting link 25 up and down with axle 24a and shank.

The moving up and down crank connecting link 25 of shank is set to approximate horizontal, and at the rotatable axle 29 that is installed with of central portion, according to connecting shaking of connecting rod 24, the other end is even the moving up and down fork 25a of shank shakes along the vertical direction.

The tip of the moving up and down fork of shank 25a is clamped by the thrust ring 16,17 in the substantial middle portion that is fixed on shank 11 on the moving up and down connecting rod 26 of shank of the installation that two ends can rotate freely, and makes the moving up and down connecting rod 26 of shank free to rotate.Like this, shank 11 rotates the moving up and down crank connecting link 25 of shank 21 by belt pulley 21 up and down by the electrical motor of sewing machine driving, and by the moving up and down fork 25a of shank, shank moves connecting rod 26 up and down and constitutes knee-actions again.

Thread take-up tension lever 4, be set to extension state up and down, in the central, to be installed in the interior thread take-up tension lever axle 42 of frame (omitting among the figure) is the rotatable support in center, its upper end is formed with the hole 43 that upper thread Y1 passes through, be installed with in the top along be fixed on the aftermentioned axle 28 the roller 44 that freely rotates of the outer peripheral edges of thread take-up tension lever driving cam 41.

This roller 44 is in the state of pushing down thread take-up tension lever driving cam 41 by the power that applies of the spring 46 that connects above thread take-up tension lever 4.Like this, when belt pulley 21, when axle 28 rotates, roller 44 rotates along the shape of thread take-up tension lever driving cam 41.That is, thread take-up tension lever 4 is set to that fore-and-aft direction (arrow C direction) shakes by the rotation of belt pulley 21, shake synchronously with shank 11 is moving up and down, and, not only carry upper thread Y1 but also hand-pulled noodles line Y1 from the eedle 12 to eedle 12.

Eedle 12 by rotating mechanism 7, and rotates for the line shuttle pedestal 3 that the line shuttle is rotated synchronously.

As shown in Figures 2 and 3, on the online shuttle pedestal 3, be provided with the line shuttle driving shaft 31 with the rotation interlock of belt pulley 21, the thread-laying mechanism driving shaft 39 of the driving thread-laying mechanism that is provided with in the middle of this line shuttle driving shaft 31 can move up and down.And this thread-laying mechanism driving shaft 39 has and the same spline structure of Sewing machines in the past, by moving up and down, makes the thread-laying mechanism action by the connecting rod that does not show among the figure.

Line shuttle driving shaft 31 and thread-laying mechanism driving shaft 39, by be connected with belt pulley 21 because the rotation of belt pulley 21, and the rocking arm (omitting among the figure) of formation is shaken with abridged cam among the figure etc., be provided with on the online shuttle pedestal 3 so movingly up and down.Moving up and down of this line shuttle driving shaft 31 and thread-laying mechanism driving shaft 39, be upward freely to shake installation by making the line shuttle that is arranged on line shuttle pedestal 3 tops that show among Fig. 3 that fulcrum shaft 35a is installed, connecting each connecting rod that does not show among the figure of the action cam that does not show among line shuttle erecting bed 35 and the figure, make the right line shuttle that does not show among line shuttle 30 and the figure, left thread-laying mechanism and right thread-laying mechanism carry out shaking separately respectively.

And, rotating mechanism 7, have axle and be provided with the pulse motor that does not show among the figure of sprocket wheel, with with the sprocket wheel of pulse motor, the line shuttle sprocket wheel 71 that the bottom one of online shuttle pedestal 3 is fixing, hang on the sprocket wheel of pulse motor and the line shuttle sprocket wheel 71 and make the following toothed belt 72 of its interlock, be provided with the power transmission shaft 73 that hangs with following toothed belt 72 rotatable lower sprocket 73b and be provided with upper sprocket wheel 73a in the upper end in the lower end, make the shank rotation belt wheel 75 of shank 11 rotation, hang on the sprocket wheel 73a of power transmission shaft 73 upper ends and the shank rotation belt wheel 75 and make the last toothed belt 74 etc. of its interlock.

Upper thread adjusting device 50 and bottom line adjusting device 8 are made of respectively the line tension bringing device 200 of as shown in Figure 4 embodiment 1.

In Fig. 4,201 is the line adjustment disk, 202 is outer dish (movable plate), 203 is inner disc (fixed disk), and 205 are the action axle, and 206 is to dock with the outside of outer dish 202, and make outer dish 202 docking sections of moving according to the action of action axle 205,206a is 206 dishes that stretch out towards periphery and outer docks from the docking section butt strip, and 207 is the fixing inner disc fixed part of the frame of

inner disc

203, and 211 is the voice coil motor as the linear dc motor of low-inertia motor, 212 is magnetic circuit, 213 is the cylindrical shape deflection coil, and 214 is permanent magnet (the outer utmost point), and 215 is (central electrode) unshakable in one's determination, 216 is moving coil, 217 are the compensation copper pipe, and 218 is coil, and 219 is winding head.

As shown in Figure 4, in the frame of not showing in the drawings, the line adjustment disk 201 that particularly has in the head, by forming the mechanism that right outer dish 202 and inner disc 203 constitute, in the present embodiment, on the inner disc fixed part 207 on the frame, inner disc 203 is housed, the outer dish 202 as movable plate that can be free to slide is housed with these inner disc 203 subtends as fixed disk.

That is, on the docking section 206 of the tip of the action axle 205 that the 202 approximate centre portions that are fixed on inner disc of coiling outward can insert with being free to slide, by the slip of action axle 205, variable outer dish 202 and and the inner disc 203 of its subtend between the interval.

And, opposite with present embodiment, also can inner disc 203 as movable plate, dish 202 is as fixed disk outward, and at this moment, docking section 206 can be made as one with the inner disc 203 as movable plate, in tip involutory be connected of this docking section 206, so push down docking section 206 by action axle 205 with action axle 205.

The action axle 205 at the center of the inner disc 203 of insertion line adjustment disk 201 is driven by voice coil motor 211.

This voice coil motor 211, by the cylindrical shape deflection coil 213 that constitutes magnetic circuit 212, week is gone up the outer utmost point 214 of the permanent magnet that is provided with in its end, be made as the central electrode 215 of the iron core of one with the central part of described cylindrical shape deflection coil 213, and this central electrode 215 and outside the moving coil cylindraceous 216 that is provided with between the utmost point 214 constitute.And moving coil 216 is the parts that the periphery of compensation copper pipe 217 is provided with coil 218, and the central portion of the winding head 219 of its tip and described action axle 205 become one.

Above voice coil motor 211, there is effect in 214 pairs of moving coil 216 magnetic fields of the outer utmost point (permanent magnet) that have according to the periphery by the central electrode (iron core) 215 of magnetic circuit 212, to the control electric current of the moving coil in this magnetic field (coil 218) 216 by control electric current supply loop (CC: omit among the figure) supply, make moving coil 216 produce the active force of thrusts or attraction, the action axle 205 that has on the winding head 219 makes the central portion as the inner disc 203 of fixed disk advance (or retreating).

And, voice coil motor 211 has the little swift characteristic of inductance, and moving body is a moving coil 216, except that having the little swift characteristic of inertia, the active force of moving coil 216 and range-independence are certain, have the characteristic that can take out with the proportional linear active force of electric current.

Owing to be voice coil motor 211 with such characteristic, can by with the advancing or backward movement of moving coil 216 all-in-one-pieces action axle 205, by docking section 206 outer dish 202 is moved vertically, gap between change and the inner disc 203 can be to the suture change chucking power by line adjustment disk 201.That is, the tension force that upper thread Y1 and bottom line Y2 apply can be regulated in electricity consumption, the elasticity of the stitching that can form by upper thread Y1 and bottom line Y2 or relax like this, or hard.And, with voice coil motor 211 and core motor or with the Linear Driving magnet of its characteristic close, os etc. directly or indirectly connection also can change chucking power to line, i.e. line tension.

And upper thread adjusting device 50 and bottom line adjusting device 8 also can resemble the structure of the line tension bringing device 300 of embodiment shown in Fig. 52.

In Fig. 5 (a) and (b), 301 is rotary body (line wheel), and 302a, 302b are line wheel halfbody, and 303a, 303b are disc portion, 304 is bite, 311 is the hysteresis brake as electromagnetic braking, and 312 is the electric capacity stator, and 312a is an outside magnetic pole, 312b is inboard magnetic pole, 313 is output shaft, and 314 is magnet exciting coil, and 315 is the gyrator of cup-shaped permanent magnet.

As shown in Figure 5, as the line of rotary body wheel 301, the mutual interlock of

spoke

303a, 303b of the arcuation that is provided with on each

line wheel halfbody

302a, 302b each is radial is involved in for Y11 time at bite 304 place's upper threads.

Above line wheel 301 is fastened on the hysteresis brake 311.

This hysteresis brake 311, as shown in Figure 5, by electric capacity stator 312, outside magnetic pole 312a, inboard magnetic pole 312b, output shaft 313, magnet exciting coil 314 and constitute as the permanent magnet 315 of gyrator.

Promptly, in hysteresis brake 311, as shown in the figure, inside at electric capacity stator 312, be provided with and the magnet exciting coil 314 of output shaft 313 on concentric circles, by supplying with the control magnetic force that electric current produced to this magnet exciting coil 314, respectively guiding be arranged on the electric capacity stator 312 and with output shaft 313 concentrically ringed outside magnetic pole 312a and inboard magnetic pole 312b.

Between outside magnetic pole 312a and inboard magnetic pole 312b, putting into does not have permanent magnet magnetized 315 as the cup-shaped of gyrator.

And outside magnetic pole 312a and inboard magnetic pole 312b each have 12 utmost points in the example as shown in Figure 5.

For example, on upper thread adjusting device 50, during with above-mentioned line tension bringing device 300, in thread supplying apparatus (omitting among the figure) and the thread path between the thread take-up tension lever 4, be provided with line wheel 301 as the output shaft 313 of the hysteresis brake 311 of brake apparatus as the coil of wire of the upper thread Y1 of suture.Concrete structure is, upper thread Y1 from the coil of wire to the path that thread take-up tension lever 4 is carried, the amount of the upper thread Y1 that carried by line wheel 301 is with hysteresis brake 311 restrictions.Onlinely take turns on 301 1 time and be involved in upper thread Y1, when by arrow P direction (with reference to Fig. 1) hand-pulled noodles line Y1, line wheel 301 is when pressing arrow R direction (with reference to Fig. 1) rotation, and the braking moment of hysteresis brake 311 applies tension force to the tension direction of upper thread Y1.

Then, eedle 12 penetrates the sewing that does not show among the figure, when making the logical wire-crossing wheel 301 of upper thread Y1 by the action of thread take-up tension lever 4, corresponding to its amount of movement line wheel 301 rotations.And the control electric current of hysteresis brake 311 is provided by the control current supply circuit.

When making magnet exciting coil 314 energisings of hysteresis brake 311 by supply by this control current supply circuit control electric current, the magnetic force that produces by this magnet exciting coil 314 lead respectively be arranged on the electric capacity stator 312 and with output shaft 313 concentrically ringed outside magnetic pole 312a and inboard magnetic pole 312b, produce magnetic field in the space between them, make permanent magnet magnetized 315 magnetization that do not have in the space that is arranged between its outside magnetic pole 312a and inboard magnetic pole 312b as gyrator.

With this state, when line wheel 301 will rotate, because permanent magnet 315 has hysteresis characteristic, the change of its polarity likened the rotation evening into the permanent magnet 315 of gyrator to, and its result produces brake force.

This brake force produces according to the continuous change of magnet polarity, thus brake force is not produced change, and also it is poor that the torque when torque in the time of from stopping to rotating and high rotation does not have yet.And for the exciting current of magnet exciting coil 314, braking moment is pressed non-linear increase with the increase of exciting current.

Like this, the 2nd line tension bringing device 300 uses as upper thread adjusting device 50 and bottom line adjusting device 8, also can electricity consumption regulates the line tension that upper thread Y1 and bottom line Y2 are applied, and causes the suture or the pine that are formed stitching by upper thread Y1 and bottom line Y2, or tightly.

Below, the connection path of upper thread Y1 in the sewing machine for binding buttonhole of said structure and bottom line Y2 is described with reference to Fig. 1.To this embodiment, to as upper thread adjusting device 50 and bottom line adjusting device 8, describe with the line tension bringing device 200 of the embodiment 1 of voice coil motor.

The sewing machine for binding buttonhole of present embodiment, upper thread Y1 derives from the upper thread feedway of the coil of wire etc., externally passes through between dish 202 and the inner disc 203 from one again, passes the hole portion 43 of thread take-up tension lever 4, enters in the shank from the upper end of shank 11.That is the structure of oriented shank 11 importings.Enter the upper thread Y1 of this shank 11, derive equally from the line outlet opening 11a of the bottom of shank 11 with example in the past, and guiding eedle 12.

The path of upper thread Y1 as mentioned above need not be to example in the past like that by auxiliary upper thread regulating element 52, upper thread regulating element 53, shank line guiding mechanism 55, feed adjustment bar 56 etc., with simple path from thread take-up tension lever 4 to shank 11.

And bottom line Y2 as depicted in figs. 1 and 2, draws from line shuttle thread volume, externally passes through between dish 202 and the inner disc 203 from one of line adjustment disk 201 again.Draw bottom line Y2 from this line adjustment disk 201 then, as shown in Figures 2 and 3, enter thread-laying mechanism driving shaft 39, draw and by the bottom line axis of guide 32, bottom line is by the line shuttle 30 on spring 35 leading line shuttle pedestals 3 tops from thread-laying mechanism driving shaft 39.

The tension force of aforesaid bottom line Y2 takes place and its adjustment is undertaken by line tension bringing device 200, so the path of bottom line Y2 as mentioned above, with routine in the past different be, not through the bottom line axis of

guide

32,33, turn back at bottom line regulating element 37 places again through the bottom line axis of guide 33, through the path of the complexity of the bottom line axis of guide 32, so there is no need the bottom line axis of guide 33 and bottom line regulating element 37 are set on the online shuttle pedestal 3, can make simple in structure.

Above sewing machine for binding buttonhole is controlled according to the control block diagram shown in Fig. 6.

That is, as shown in the figure, CPU (central processing unit) 100 is by data/address bus and ROM (read-only storage) 101, RAM (random access memory) 102, X carries counter 103, and Y carries counter 104, revolution meter 105 inserts controller 108, and I/O interface 109 connects.And, by these CPU100, ROM101, RAM102, X carries counter 103, and Y carries counter 104, and revolution meter 105 inserts controller 108, and I/O interface 109 grades constitute control device.

In ROM101, there are the various data that comprise the default data of controlling corresponding to each the various control program handled and the line adjusting of relevant sewing machine for binding buttonhole.And, in ROM101, also storing as the line tension bringing device 200 of upper thread adjusting device 50 with as line tension bringing device 200 fens other voice coil motors 211, supply electric current and the dependency relation data of length tension relation of bottom line adjusting device 8 to 211.For example, the dependency relation data of supply electric current and length tension relation are the data that obtain from experiment.

In RAM102, there are various variablees for controlling, for example, stitch data, eedle wobble data etc.

X carries counter 103, and Y carries counter 104, and revolution meter 105 is by writing each count value, write count enable instruction, through with count value after proportional time, the count signal of 1 pulse of output, write the counting halt instruction again, count output repeatedly with some cycles.

Inserting controller 108, is the insertion signal according to each input, will carry out automatically corresponding to each insert division reason CPU100 that inserts signal.

I/O interface 109 is interfaces of the input and output of CPU100 and outside.That is, according to the control program and the control data that write among the ROM101, the various machines that are connected with control I/O interface 109.

And X carries counter 103, and Y carries counter 104, and the output of each counter of revolution meter 105 is connected with insertion controller 108, with the output of each counter, carries out insertion corresponding to each counter and handles.

In Fig. 6, as the guidance panel 9 of thread tension setting operating means, as shown in Figure 8, to form by display part and various key, its operator is various settings/operation necessary in being used for making.

The driver 111 of X transport pulse motor, according to X carry the X of counter 103 carry count output signal and from the X throughput direction of I/O interface 109 outputs+/-signal, with the output of 1 time counting as 1 pulse branch, along the X throughput direction+/-make pulse motor 150 rotations.The driving of the X transport pulse motor 150 that divides according to 1 pulse, the cloth pushing table that does not show among the figure, for example mobile 0.1mm.

The driver 112 of Y transport pulse motor, according to Y carry the Y of counter 104 carry count output signal and from the Y throughput direction of I/O interface 109 outputs+/-signal, with the output of 1 time counting as 1 pulse branch, along the Y throughput direction+/-make pulse motor 151 rotations.The driving of the Y transport pulse motor 151 that divides according to 1 pulse, the cloth pushing table that does not show among the figure, for example mobile 0.1mm.

The driver 113 of rotary pulsed motor, according to the rotation counting output signal of revolution meter 105 and from the direction of rotation of I/O interface 109 outputs+/-signal, with the output of 1 time counting as 1 pulse branch, by direction of rotation+/-make pulse motor 152 rotations.The driving of the rotary pulsed motor 152 that divides according to 1 pulse, shank 11 and line shuttle pedestal 3 for example, rotate 1 time.

The driver 115 of electrical motor of sewing machine, according to Sewing machines startup/stop signal and sewing velocity signal from 109 outputs of I/O interface, when Sewing machines starts, make electrical motor of sewing machine 153 rotations with the regulation rotation number, when Sewing machines stops, based on the detection of eedle upper position sensor 116, electrical motor of sewing machine 153 is stopped by well-known allocation arresting stop.

Eedle upper position sensor 116 is the sensors that detect the last position of described shank 11.That is, whether detect the position of eedle 12 last.And the last position probing output of described eedle upper position sensor 116 is used as the input of pin counter.

And driver 115, Sewing machines stopped or turning round in state, signal output in I/O interface 109 stops/turning round as the Sewing machines stator, and, will from the signal of eedle upper position sensor 116 outputs to insert controller 108 as eedle on the insertion signal output of position.

And driver 115 will be from carrying reference position sensor 117, and the signal of TG (tachometer generator) generator 118 outputs inserts as the conveying benchmark to inserting controller 108, and TG inserts output respectively.Carrying reference position sensor 117 and TG generator 118 is to be used for X to carry motor/Y to carry the drive controlling of motor/electric rotating machine etc., specifically, is the eedle position that detects 1 pin, makes each motor 150,151,152 and eedle 12 driven in synchronism.

Line tension driver 120, usually, according to data from RAM102 output by 109 inputs of I/O interface, control the voice coil motor 211 that constitutes upper thread adjusting device 50 for applying tension force, signal from the Sewing machines stator of driver 115 outputs stops/turn round, conveying reference signal, when the TG signal takes place, that is, the prescribed period of time in the Sewing machines running, control the voice coil motor 211 of upper thread adjusting device 50 for changing tension force.

And, line tension driver 120, usually, according to data, control the voice coil motor 211 of bottom line adjusting device 8 for applying tension force from RAM102 output by 109 inputs of I/O interface, signal from the Sewing machines stator of driver 115 output stops/turning round, carry reference signal, when the TG signal takes place, promptly, prescribed period of time in the Sewing machines running, control by 8 pairs of changes of bottom line adjusting device tension force.

Compress driver 121 according to the compress decline/rising signals from 109 outputs of I/O interface, drives compress solenoid 122.

X carries origin sensor 155, is the sensor that detects the origin position of X transport pulse motor 150.

Y carries origin sensor 156, is the sensor that detects the origin position of Y transport pulse motor 151.

Rotation origin sensor 157 is the sensors that detect the origin position of rotary pulsed motor 152.

Compress switch 124, be operator when cloth (sewing) is located, make the console switch of cloth presser (omitting among the figure) rising/decline.

Starting switch 125 is operators after cloth (sewing) location, makes the console switch of beginning buttonhole on this cloth.

As shown in Figure 7, driver 115 starts the commencing signal of exporting according to the Sewing machines from 109 outputs of I/O interface, begins to drive electrical motor of sewing machine 153, simultaneously, the Sewing machines stator is in the running.And the output signal that stops according to the Sewing machines from I/O interface 109 output is detected from the position of the last state of eedle at that time by eedle upper position sensor 116, stops electrical motor of sewing machine 153, also stops the Sewing machines stator.

Carry output from the X of I/O interface 109 outputs, Y carries output, rotation output, and to per 1 pin, according to carrying benchmark to insert, TG inserts and calculates position on the eedle, and exports synchronously with eedle.

Upper thread (reaching the standard grade) tension value, bottom line (rolling off the production line) tension value is to per 1 pin, with position synchronous output on the eedle.

And, as shown in Figure 8, have various keys and display part as the guidance panel 9 of thread tension setting operating means.

That is, have the thread tension configuration part 90 of the thread tension of setting buttonhole, prepare key 91, setting key 92 again, and sewing speed coefficient key 93 is not made key 94, the empty key 95 etc. of carrying.

In the on-line tension configuration part 90,, be provided with setting section selection portion 910, datum line tension force input part 920, individual wire tension force input part 930 for being set in the upper thread in the eyelet buttonhole and the line tension of bottom line.

Setting section selection portion 910 is can make part to the each several part that forms buttonhole on sewing to select, and goes out to be shown with the skeleton diagram that forms buttonhole on sewing at central portion, and the skeleton diagram that should form buttonhole is provided with, if press key, just can select respectively and set the each several part of formation buttonhole, it has initiating key 911, end key 912, stream door bolt right button 913, straight line right button 914, buttonhole right down key 915, buttonhole key 916, buttonhole left down key 917, straight line left button 918, each key of stream door bolt left button 919.

Each position corresponding to the actual buttonhole of these each keys 911～919 shows in Figure 10.This Figure 10 has shown the buttonhole that forms by counterclockwise rotation.And what the arrow among this figure was represented is the direction of handling the needle.By these key inputs, can carry out the eyelet of counterpart by the control block diagram shown in Fig. 6.In addition, H is a buttonhole in Figure 10, and Ha is a hole portion, and Hb is a line part.

Promptly, press initiating key 911, actual making among corresponding Figure 10 carried out the st line tension revisal of making beginning partly, during by stream door bolt right button 913, corresponding actual line tension revisal of making the stream door bolt right side of carrying out the kr part, when pressing straight line right button 914, corresponding actual line tension revisal of making the straight line right side of carrying out the lr part, when pressing buttonhole right down key 915, corresponding actual line tension revisal of making the buttonhole bottom right of carrying out the er part.

And, when pressing buttonhole key 916, corresponding actual making carried out ey buttonhole line tension revisal partly, when pressing buttonhole left down key 917, corresponding actual line tension revisal of making the buttonhole lower-left of carrying out the el part, when continuing to press straight line left button 918, corresponding actual line tension revisal of making a straight line left side of carrying out the ll part, during by stream door bolt left button 919, corresponding actual line tension revisal of making a stream door bolt left side of carrying out the kl part, when pressing end key 912, corresponding actual line tension revisal of making the end of carrying out the ed part has the structure that the energy structure is realized above-mentioned functions.

And no matter by which key in each key 911～919, the LED that is provided with respectively on each key represents the 911a of portion, 912a, 913a, 914a, 915a, 916a, 917a, 918a, 919a lights, and by the shown numerical value of these bright lamps, can confirm that the line tension at button position is in the setting.

The input part 920 of datum line tension force, has the datum line tension force display part 921 that shows as the datum line tension value of the thread tension value input of making all benchmark of buttonhole, the following change key 922 and the last change key 923 of the show value of change display part 921, the value that will show on display part 921 is by the upper thread setting key or by the benchmark that the bottom line setting key the is selected key 924 of reaching the standard grade, the benchmark key 925 that rolls off the production line.When on display part 921, showing a reference value reach the standard grade, be arranged on the LED that benchmark reaches the standard grade on the key 924 and light, when on display part 921, showing a reference value of bottom line, be arranged on the LED that benchmark rolls off the production line on the key 925 and light.If press change key 922 and last change key 923, can change the value that on display part 921, shows.

The input part 930 of individual wire tension force, constitute the upper thread in the buttonhole position and the thread tension value of bottom line according to input by what setting section selection portion 910 was selected, can change, and display part 931 with the line tension that shows thread tension value position, selected position, on display part 931, demonstrate the key 932 of reaching the standard grade of (upper thread) tension value of reaching the standard grade at selected position, the key 933 that rolls off the production line of (bottom line) tension value that rolls off the production line that on display part 931, demonstrates, key 935, following change key 936 etc. are changed in going up of the show value of change display part 931.

When reaching the standard grade key 932 input, light with the LED932a of the key 932 adjacent settings of reaching the standard grade, when rolling off the production line key 933 inputs, light with the LED933a of the key 933 adjacent settings of rolling off the production line.Like this, the setting that can confirm to constitute the line tension in the buttonhole position is upper thread or bottom line.

Prepare key 91 and be to set the key of the possible state that buttonhole makes, when pressing, shank 11, line shuttle 30 and cloth pushing table (omitting among the figure) are back to origin position.

Sewing speed key 93 is all tension force to be multiplied by coefficient change tension force and input when the change sewing speed, can change being multiplied by any coefficient tension force.

Do not make key 94 for when not making, applying the key of tension force.

The empty key 95 of carrying is to carry out the key that tension force is set when sewing position is back to origin position, when being mainly used in sewing finishing.

Below, with reference to the flow chart of Fig. 9, describe setting with guidance panel 9.

One switch power supply has just been told guidance panel and has been set processing, by guidance panel the line tension of making buttonhole is carried out various settings.

At first, step S1 carries out benchmark (bottom line) tension force setting of reaching the standard grade that (upper thread) tension force is set and benchmark rolls off the production line.At this moment, on display part 921, show reach the standard grade benchmark key 924 or benchmark roll off the production line input one side in the key 925 be stored in default value among the ROM101 in advance.When setting line tension arbitrarily, by setting the line tension of shown numerical value to 11 increase and decrease of numerical value of display part 921 by last change key 923 or following change key 922.And, if roll off the production line and do not import a side key in the key 925 by reach the standard grade key 924 or benchmark of benchmark, just show the datum line tension value of pressing input one side, and by increasing and decreasing by last change key 923 or 922 pairs of shown datum line tension values of following change key, show any number, carry out next step S2.

At step S2, judge whether to be necessary to set to making in detail, carry out step S3 if necessary, if need not carry out step S4.

At step S3, the detailed setting when making is promptly set respectively each position that forms buttonhole.

That is,, for example, when the line tension of buttonhole lower right-most portion is set, press the buttonhole right down key, enter the buttonhole bottom right and set pattern desirable position in each position in the setting section selection portion 910.

At this moment, the numerical value that on the display part 931 of individual wire tension force input part 930, shows, if import with the key 932 of reaching the standard grade, the key of being imported is exactly, for example, the last thread tension value at buttonhole right down key 915 positions, i.e. upper thread tension value; If with key 933 input of rolling off the production line, the key of being imported is exactly, for example, and the following thread tension value at buttonhole right down key 915 positions, i.e. bottom line tension value.Numerical value by last change key 935 or 936 pairs of demonstrations on display part 931 of change key down increase and decrease then, up to showing desirable numerical value.And, when the tension force that carries out the straight line right half is set, enter the setting pattern of straight line right half by straight line right button 914, in individual wire tension force input part 930, with the key 932 or key 933 inputs of rolling off the production line of reaching the standard grade, each thread tension value is presented on the display part 931, sets numerical value, so just can set the straight line right half on the roll off the production line line tension of (upper thread, bottom line).

And, when making the line tension of beginning part, enter the beginning pattern by initiating key 911, on display part 931, show the thread tension value of button one side in the reach the standard grade key 932 or the key 933 that rolls off the production line.Use change key 935 or change the shown numerical value of key 936 changes down, just can set the upper thread tension value and the bottom line tension value of making the beginning part.By pressing each key 911～919 that is arranged in the setting section selection portion 910, can set the tension value at each position that constitutes each position of buttonhole like this.And, can also set reaching the standard grade in each position (upper thread) tension force respectively and (bottom line) tension force that rolls off the production line, like this, just can adjust the elasticity of each position stitching line at each position.

After being set in the line tension at each position at each position of formation buttonhole on the sewing like this, enter step S4.

At step S4, the line tension beyond judging whether to be necessary when making is set, if the line tension beyond there is no need when making is set, sets and finishes, and sets if necessary, carries out next step S5 or step S6.

At step S5, the tension value when carrying key 95 can set empty the conveying by sky can not set tension value when not making by making key 94, sets the relevant line tension with formation buttonhole like this.

At step S6, by pressing sewing speed coefficient key 93, the prescribed coefficient values that each thread tension value that changes and set multiplies each other, this just be through with to the relevant thread tension setting of formation buttonhole.

Form the upper thread at each position of buttonhole and the line tension of low line according to above-mentioned setting input, when making, the dependency relation data of the supply electric current of the ROM101 of the line tension that sets based on correspondence and the relation of tension force, by line tension bringing device 200 as upper thread adjusting device 50, with supply with electric current as the control current loop in the line tension bringing device 200 of bottom line adjusting device 8, apply tension force by these upper thread adjusting devices 50 and bottom line adjusting device 8 to upper thread Y1 and bottom line Y2, can produce the tension force that sets.That is, if it is big to supply with electric current, the line tension that line tension bringing device 200 applies is just big, and the suture amount that transfers out from this line tension bringing device 200 is just few, makes stitching become tight.And if it is little to supply with electric current, the line tension that line tension bringing device 200 applies is just little, and the suture amount that transfers out from this line tension bringing device 200 is just many, and stitching is fluffed.

Like this, just can regulate the line elasticity of the stitching that forms by upper thread Y1 and bottom line Y2.

According to above-mentioned formation, adjustment by upper thread adjusting device 50 and bottom line device 8, can electricity consumption adjust the upper thread Y1 that partly makes along the buttonhole on the sewing and the tension force of bottom line Y2, so, with routine different in the past, do not use tension determining apparatus and instrument just can easily regulate the tension force of upper thread Y1 and bottom line Y2, can conversion form the line elasticity of the line of stitching, can easily carry out the beamhouse operation of making of buttonhole, can make and make beamhouse operation high efficiency and shortening time significantly.

And, regulate the elasticity that forms the suture of stitching by upper thread Y1 and bottom line Y2 by upper thread adjusting device 50 and bottom line adjusting device 8 respectively, in the time of can easily realizing making suture on the sewing lax, form the soft stitching of outward appearance, when making suture on the sewing fastening, form the hard stitching of outward appearance.And, according to sewing, for example, adjust corresponding to the thickness and the hardness at the sewing place of making corresponding to the eyelet buttonhole, that is, according to the adjusting of carrying out for the elasticity of concrete per 1 needlework mark, the correspondence place of making can easily form the good zigzag chain stitch of outward appearance.

And, because by upper thread adjusting device 50 and bottom line adjusting device 8, can electricity consumption enough adjust the tension force of suture, be not single stitching with the stitching of this sewing machine for binding buttonhole formation buttonhole, and the buttonhole that can sew user's uniqueness is made stitching.

And, the dual chain-type stitch that is used for buttonhole is easy to burst at the seams, form to finish to make the upper thread Y1 that finally knots among the stitching part ed and the equalization of strain of bottom line Y2 by change respectively, the position that knots that can change these upper threads Y1 and bottom line Y2 makes final sewing line be not easy to burst at the seams.

And by upper thread adjusting device 50 and bottom line adjusting device 8, the tension force of the suture when the electricity consumption adjustment is not made can change the tension force of suture, thus can be when not making the tension force of upper thread Y1 and bottom line Y2 turn down.So, different with in the past line adjusting device, need not be provided with and make feed adjustment bar 56 that the line regulating element that applies high-tension when not making separates and auxiliary suture regulating element 52 etc.

But, to push down upper thread Y1 for preventing because to the processing of sewing with when making and make eedle is curved or breaks, the line length of staying at eedle 12 places must be stayed weak point when beginning to make.On the other hand, to strain suture when beginning to make, so when beginning to make, must carry more upper thread Y1.Therefore, habitually in the past, the transport that suture must be arranged, but according to the sewing machine for binding buttonhole that above-mentioned formation is arranged, the enough tension force of tension suture, promptly, owing to can regulate the alap tension force that the suture of sening as an envoy to is carried easily, thus just do not need the transport of suture and suture feed adjustment bar etc., simultaneously, can cut down component parts significantly than in the past Sewing machines, reduce the cost and improve reliability.

Owing to have and be connected with control device and to making the part st of beginning portion, sewing finishing part ed, stream door bolt left half kl, stream door bolt right half kr, straight line left half ll, straight line right half lr, buttonhole part ey, the guidance panel 9 that the upper thread Y1 of the each several part of buttonhole bottom left section el and buttonhole lower right-most portion er and the tension force of bottom line Y2 can be set respectively, so, by guidance panel can easily set with each position in the thickness of interval change sewing, make direction, corresponding required line tension such as sewing speed, buttonhole that so just can the desired outward appearance of eyelet.

Particularly, even when the buttonhole of sewing part is not certain thickness and hardness, also can eyelet go out the good buttonhole of outward appearance of desirable outward appearance.

And,, certainly replace the 1st line tension bringing device 200 and adopt the 2nd line tension bringing device 300 as upper thread adjusting device 50 and bottom line adjusting device 8.And, also can be with a side of upper thread adjusting device 50 and bottom line adjusting device 8 as the 1st line tension bringing device 200, the opposing party is as the 2nd line tension bringing device 300.

As mentioned above, 1 sewing machine for binding buttonhole according to the present invention can easily carry out snap close The preparation of making operation of eye can make the preparation efficient activity and when shortening significantly of making operation Between, can easily sew the good buttonhole of outward appearance at the place of making by the elasticity of desirable line. And, can cut down significantly component parts than formation in the past, reduce cost and improve reliability.

2 sewing machine for binding buttonhole according to the present invention can access 1 buttonhole with the present invention The effect that sewing machine is same, simultaneously for 1 buttonhole, each part of this buttonhole of adjusting formation The tension force of upper thread and bottom line can change the line elasticity at these positions. So, even on the sewing When buttonhole part is not certain thickness and hardness, also can form corresponding to its thickness and hardness The stitching of suture so just can go out the good buttonhole of desirable outward appearance by eyelet.

3 sewing machine for binding buttonhole according to the present invention, can access with the present invention 1 or 2 The effect that sewing machine for binding buttonhole is same simultaneously can be easily by described tension force setting operation device Set with the thickness of the change at the interval of every part, sewing, to make direction, sewing speed etc. relative The needed line tension of answering, so just the energy eyelet goes out the buttonhole of desirable outward appearance.

Claims

1. sewing machine for binding buttonhole, according to the shank that makes the eedle knee-action that is arranged on the bottom, with be provided with in the lower parts of needle subtend and with the coordination of moving synchronously driven line shuttle up and down of described shank, carry out buttonhole along the buttonhole on the sewing with chain-type stitch, it is characterized in that, have: be arranged on the upper thread path that imports described shank, can adjust the upper thread tension force generating means of the tension load of this upper thread by electricity; Be arranged on the bottom line tension generating means that to adjust the tension load of this bottom line on the bottom line path that imports described line shuttle by electricity; The elasticity of corresponding stitching is controlled the control device of described upper thread tension force generating means and bottom line tension generating means; Control described two tension force generating means by described control device, change the tension force of described upper thread and bottom line, can change the elasticity of the stitching of eyelet buttonhole.

2. according to the sewing machine for binding buttonhole described in the claim 1, it is characterized in that described control device is the part to each described buttonhole stitching, can opposite line tension generating means and the device controlled of bottom line tension generating means.

3. according to the sewing machine for binding buttonhole described in claim 1 or 2, it is characterized in that, also have with described control device and be connected, stitching part to each described buttonhole, can set the thread tension setting operating means of upper thread tension force and bottom line tension respectively, described control device can be controlled described two tension force generating means, makes the setting tension force that constitutes this thread tension setting operating means.