CN1381628A - Buttonhole machine controlled by sewing machine - Google Patents

Abstract

A hole sewing machine is provided with a bobbin thread draw-in device provided with a bobbin thread draw-in means slackening the bobbin thread by drawing in the bobbin thread by a prescribed operation and then returning to an initial state, a feed bar moved between an origin position and a sewing position and a bobbin thread cutting device comprising a fixed knife, a movable knife, a clamping member clamping the bobbin thread at the time of cutting the bobbin thread and a thread hold opener turning the clamping member to the state capable of inserting or releasing the bobbin thread before and after cutting the bobbin thread. At the time of cutting the bobbin thread, after the bobbin thread draw-in means is made to perform the prescribed operation from the initial state, the bobbin thread is cut by the bobbin thread cutting device in the state of clamping the bobbin thread by the clamping member and then, the bobbin thread draw-in means is returned to the initial state before releasing the bobbin thread by the thread hold opener.

Description

Buttonhole machine controlled by sewing machine

Technical field

The present invention relates to a kind of Buttonhole machine controlled by sewing machine that in holes such as formation buttonhole, around this hole, imposes eyelet.

Background technology

Buttonhole machine controlled by sewing machine in the past forms stitch with the eedle that moves up and down and swing that is installed with upper thread with the coordination of the rotating shuttle that is installed with bottom line that is located at the eedle below around the hole.

On this Buttonhole machine controlled by sewing machine, be provided with as open the device for cutting lower thread that is published in the flat 2000-300885 communique the spy of Japan in addition, shown in Fig. 2 is the device for cutting lower thread 37 that above-mentioned communique publishes.Device for cutting lower thread 37 is to drive movable cutting knife 50 to horizontally rotate to fixed cutting tool 44, and between cuts off the structure of bottom line 38 and heart yearn 34.

On device for cutting lower thread 37, be provided with clamping device 55, before cutting off, clamp bottom line 38 and heart yearn 34, and each line is imposed tension force so that cut off easily, also continue clamping after cutting off simultaneously and line, be used to make make successfully next time begin with clamping device 55.Above-mentioned clamping device 55 has and is located at heart yearn clamp 58 and the bottom line clamp 60 of fixed head (bottom line be fixedly clamped plate) about in the of 56, is clamping heart yearn 34 between fixed head 56 and the heart yearn clamp 58, clamps bottom line 38 between fixed head 56 and bottom line clamp 60.

And, near movable cutting knife 50, be provided with clamp release 64.Before cutting off suture, if this clamp release 64 rotates simultaneously with movable cutting knife 50, then the operating member 65 of its front end just the clamp pin 62 of clamping device 55 to pressing down, therefore bottom line clamp 60 just is pressed towards the below, open between fixed head 56 and the bottom line clamp 60 and make, clamping is therebetween reliably bottom line 38.

And, though in above-mentioned bulletin, do not publish, to consume suture to a certain degree when in fact cutting off.For this reason, below above-mentioned rotating shuttle, be provided with down bottom line and make its lax bottom line line falling device, the consumption degree that line falling in advance is used for replenishing the cut-out line before the cut-out suture.Carrying out line falling like this, when cutting off suture be in to a certain degree by tension state, and, again bottom line is applied tension force hardly after cutting off line.

When suture is cut off, use the line falling of bottom line line falling device before the at first online cut-out, movable then cutting knife 50 is hooking heart yearn 34 with its recess 50a respectively, is hooking with recess 50b under the state of bottom line 38 to fixed cutting tool 44 rotations, at this moment, clamp release 64 also rotates together, in the time will cutting off, make clamping device 55 become open state with the operating member 65 of clamp release 64, the heart yearn 34 and the bottom line 38 of being come by movable cutting knife 50 bands are clamped respectively.Then, movable cutting knife 50 contacts with fixed cutting tool 44, and heart yearn 34 and bottom line 38 are cut off.Then, movable cutting knife 50 and clamp release 64 rotate and get back to the origin-location round about.

Backward rotation because of this clamp release 64, operating member 65 once more by clamp pin 62 opening between fixed head 56 and the bottom line clamp 60, at this moment owing to be in the state that original bottom line is not applied tension force, so as published in the 25th section of above-mentioned communique, bottom line 38 can not deviate from.

But, when bottom line is that Spandex elastica etc. is when sliding the line kind of bad material, and the storage of bottom line supply source tails off etc. under the occasion, the load that bottom line is supplied with source becomes big, the bottom line in the path from the bottom line supply source to bottom line line falling device can stretch, and the line falling amount of the reality before cutting off is reduced.In this state, owing on cut and clamped bottom line, produced tension force, in case just have relieving between fixed head after the cut-out 56 and bottom line clamp 60, the phenomenon that bottom line 38 just comes off.

In a single day bottom line deviates to produce initial stitch wire jumper and stringing when making next time bad etc., becomes the problem that can not form good stitch.

At this moment, if make the line falling amount enough big with bottom line line falling device before cutting off suture, just can prevent to come off as above-mentioned bottom line.But, bottom line just is relaxed state in case the line falling amount is excessive, be difficult to heart yearn and bottom line are separated before cutting off, the action with movable cutting knife during cut-out can not be eliminated lax part, then the possibility that is not tensioned and can not cuts off because of bottom line when coincideing with fixed cutting tool.

The object of the present invention is to provide and a kind ofly can cut off bottom line reliably, and when cutting off, prevent that bottom line from coming off, forming the Buttonhole machine controlled by sewing machine of good whipstitch.

Summary of the invention

In order to solve above problem, the present invention's 1 Buttonhole machine controlled by sewing machine for example, as Fig. 1, Fig. 5, shown in Figure 6, has:

Be arranged in the face of being arranged on the shank (11) on the chain-drive section (14) of sewing machine frame in the support portion (12) and with the rotating shuttle device (rotating shuttle portion (20) and rotating shuttle support (70)) of described shank synchronization action;

By returning to previous status afterwards and make the lax bottom line line falling mechanism (80a) of bottom line and drive the bottom line line falling device (80) that the bottom line line falling driving mechanism (upper thread cut-out cylinder 92) of bottom line line falling mechanism is formed to pour out bottom line (38);

Be located at cloth pushing table (13) above the support portion, that carrying is made thing (F) and moved at least between origin position and sewing position;

Be located on the described cloth pushing table, hold assembly is before and after the bottom line can to penetrate the bottom line state or discharges the device for cutting lower thread (37) that the releasing parts (clamp release 64) of bottom line state constitutes to the hold assembly (clamp fixed head 56, heart yearn clamp 58, bottom line clamp 60) that cuts off back clamping bottom line and cutting off before cutting off by the movable cutting knife (50) that cuts off bottom line with from bottom line;

This Buttonhole machine controlled by sewing machine (10) carries out lockhole with the coordination of shank and rotating shuttle device to be made, and cuts off bottom line with device for cutting lower thread then, it is characterized in that:

When cutting off bottom line, make bottom line line falling mechanism action by bottom line line falling driving mechanism, clamping by hold assembly under the state of bottom line then, cut off bottom line by device for cutting lower thread, before becoming the state that makes hold assembly release bottom line by releasing parts, make bottom line line falling mechanism return to original state then by bottom line line falling driving mechanism.

1 Buttonhole machine controlled by sewing machine according to the present invention, at first, bottom line line falling mechanism begins described specified action from original state, bottom line is poured out, under this state, bottom line is clamped by hold assembly, cut off bottom line by device for cutting lower thread then, then make bottom line line falling mechanism turn back to reset condition and make bottom line lax, make hold assembly be the state that can discharge bottom line by releasing parts again.At this constantly, because bottom line is to be in lax state, so can not split away off from hold assembly.

That is, before clamping device was release conditions, bottom line relaxed, even so under the big situation of loading because of the kind of bottom line or because of the line supply side, bottom line can not come off from hold assembly yet, can not produce wire jumper etc. when making together down, can successfully form good lockhole stitch.

And, because before cutting off, bottom line is in the state of pouring out line with bottom line line falling device, so, on bottom line, applied tension force to a certain degree, can easily cut off bottom line.

At this, it can be a connection bottom line line falling driving mechanism, bottom line line falling mechanism just carries out the action of afore mentioned rules, turn back to original state once disconnecting, make the course of action of LSOR, also can be when carrying out compulsory exercise and when returning original state, the structure that bottom line line falling driving mechanism is switched on and off.In addition,, can use cylinder, solenoid, motor etc., promptly can be used as the driving power of bottom line line falling device special use, driving power that also can other action of double as bottom line line falling driving mechanism.

The present invention's 2 Buttonhole machine controlled by sewing machine is in the present invention's 1 Buttonhole machine controlled by sewing machine, for example, as Figure 10, shown in Figure 12, it is characterized in that:

Cloth pushing table moved to origin position from sewing position before the later bottom line of sewing finishing cuts off; And be provided with and before bottom line cuts off, select whether to pour out bottom line and make the lax selection mechanism (guidance panel 150,200) of bottom line by bottom line line falling device.

If before bottom line cut off, the amount of movement of cloth pushing table from the sewing position to the origin position was long, the bottom line consumption of making on the thing that is connected on the cloth pushing table is just many.Whether 2 Buttonhole machine controlled by sewing machine according to the present invention can be selected pour out bottom line and it is relaxed with bottom line line falling device before bottom line cuts off by selection mechanism.Thereby, when the bottom line consumption is many,, bottom line is applied undue tension force when preventing that cloth pushing table from moving just with the line falling of selection mechanism selection bottom line.In addition,, bottom line consumption short when amount of movement if select not line falling by selection mechanism, just do not carry out unnecessary bottom line line falling after a little while, relaxes excessively to prevent bottom line.

The present invention's 3 Buttonhole machine controlled by sewing machine is in the present invention's 1 described Buttonhole machine controlled by sewing machine, it is characterized in that:

Cloth pushing table moved to origin position from sewing position before the later bottom line of sewing finishing cuts off; According to the movable length from the sewing position to the origin position, whether decision was automatically poured out bottom line by bottom line line falling device and is made bottom line lax before bottom line cuts off.

3 described Buttonhole machine controlled by sewing machine according to the present invention can be obtained and the present invention's 2 same effects, simultaneously, because decision automatically, so its convenience is higher.

The present invention's 4 Buttonhole machine controlled by sewing machine is in the present invention's 1 described Buttonhole machine controlled by sewing machine, for example, as Figure 10, shown in Figure 12, it is characterized in that:

When making beginning, cloth pushing table moves to sewing position from origin position; And be provided be chosen in bottom line and cut off after and for beginning next time to make when cloth pushing table is moved, whether pour out bottom line and make the lax selection mechanism (guidance panel 150,200) of bottom line by bottom line line falling device.

4 Buttonhole machine controlled by sewing machine according to the present invention, if it is long to the amount of movement of the cloth pushing table of sewing position from the origin position of making beginning, the bottom line that then is clamped on the clamping device of the device for cutting lower thread on the cloth pushing table also consumes manyly, whether 4 Buttonhole machine controlled by sewing machine according to the present invention can by selection mechanism to being poured out bottom line and is made its lax selection by bottom line line falling device when making next time.Thereby, when because of making moving of when beginning next time, when the bottom line consumption is big, select bottom line to pour out bottom line in advance, to prevent when making cloth pushing table and move next time, bottom line being applied undue tension force with selection mechanism.Simultaneously, what is called does not apply undue tension force to bottom line, weakens the clamping force of hold assembly exactly, therefore can make each the part miniaturization that constitutes hold assembly.

, bottom line consumption short when amount of movement if select not line falling with selection mechanism, just do not carry out unnecessary bottom line line falling after a little while, relaxes excessively to prevent bottom line.

The present invention's 5 Buttonhole machine controlled by sewing machine is in the present invention's 1 described Buttonhole machine controlled by sewing machine, it is characterized in that:

When making beginning, cloth pushing table moves to sewing position from origin position; According to the movable length of making next time from the origin position to the sewing position, automatically determine after bottom line cuts off and, whether pour out bottom line and make bottom line lax by bottom line line falling device for beginning next time to make when cloth pushing table is moved.

5 Buttonhole machine controlled by sewing machine according to the present invention can be obtained and the present invention's 4 same effects, simultaneously owing to can determine automatically that its convenience is higher.

In addition, the present invention 3 or 5 in so-called " according to movable length " can be according to the decision of the movable length of reality, also can make the length decision according to relevant with movable length.

Description of drawings

Fig. 1 is the exemplary plot of Buttonhole machine controlled by sewing machine of the present invention, (a) is overall perspective view, (b) is the abutment portion partial, partially-cross-sectioned side-elevation view.

Fig. 2 is the device for cutting lower thread stereogram of the Buttonhole machine controlled by sewing machine of Fig. 1.

Fig. 3 is the vertical view of the state of device for cutting lower thread when cutting off bottom line of Fig. 2.

Fig. 4 is the vertical view of clamping device of the device for cutting lower thread of Fig. 2.

Fig. 5 is the vertical view that rotating shuttle portion and rotating shuttle support are seen from the front.

Fig. 6 is the surface thread cut-off device side view.

Fig. 7 is the Buttonhole machine controlled by sewing machine control circuit calcspar of Fig. 1.

Fig. 8 makes the data content schematic diagram of setting for lockhole.

Fig. 9 is used to illustrate that the Buttonhole machine controlled by sewing machine with Fig. 1 forms the buttonhole of stitch and the pattern diagram of buttonhole.

Figure 10 is the guidance panel schematic diagram.

Figure 11 is a buttonhole entire exercise flow chart.

Figure 12 (a) (b) is storage switch setting content table for setting the guidance panel of storage switch numbering.

Figure 13 is for setting the flow chart of processing in storage switch setting pattern.

Among the figure: 10-Buttonhole machine controlled by sewing machine, 11-shank, 12-support portion, 13-cloth pushing table, 14-chain-drive section, 18-eedle, 20,70-rotating shuttle portion, rotating shuttle support (rotating shuttle device), 37-device for cutting lower thread, 38-bottom line, 44-fixed cutting tool, 50-movable cutting knife, 55-clamping device, 56,58,60-fixed head, the heart yearn clamp, bottom line clamp (hold assembly), 64-clamp release, 65-operating member, 80-bottom line line falling device, 80a-bottom line line falling mechanism, 92-cylinder (upper thread cut-out cylinder), F-make thing, 110-control circuit, 150,200-guidance panel (selection mechanism).

The specific embodiment

Below, describe embodiments of the invention with reference to the accompanying drawings in detail.

The Buttonhole machine controlled by sewing machine 10 of the present invention's one example shown in Fig. 1 (a) and (b) is when forming the buttonhole H that is made of round eye h1 shown in Figure 9 and parallel portion h2, imposes the Sewing machines of eyelet W around this buttonhole H.Eyelet W is made of the right side eyelet w1 of portion, the circle eye eyelet w2 of portion, the left side eyelet w3 of portion and the straight line bolt-lock seam w4 of portion.

Buttonhole machine controlled by sewing machine 10 is made of with the chain-drive section 14 that setting is arranged on this base support 12 the support portion 12 of slightly rectangular casing, puts cloth on sewing machine table (not shown) by drain pan 16.Be provided with the shank 11 that the bottom has eedle 18 in the front portion of chain-drive section 14, it can move up and down and direction (with the vertical aspect of drawing of Fig. 1 (b)) balancing point to the left and right.

In addition, in support portion 12, in the face of shank 11, be provided with the rotating shuttle support 70 that its top has rotating shuttle portion 20, form stitch by the synchronous action of shank 11 and rotating shuttle portion 20 and with both co-operatings.In addition, at the round eye h of buttonhole H ₁Make when being radial whipstitch, shank 11 and rotating shuttle support 70 rotate synchronously.Rotating shuttle portion 20 and rotating shuttle support 70 remain aftermentioned.

In addition, near rotating shuttle 20, be provided with the not shown heart yearn guiding mechanism of between balancing point position, the left and right sides of eedle 18, deriving, heart yearn 34 is sewed up be used to strengthen stitch in the stitch from the heart yearn 34 (Fig. 2, Fig. 3) of drawing for line source (omit diagram).

And, also be furnished with by rag knife that is positioned at rotating shuttle portion 20 rear sides (not shown) and the cloth-cutting apparatus that holds cutter platform 33 (Fig. 1 (b)) formation that is abutted against with it, leaves from this rag knife top, upward formation buttonhole H of thing F (Fig. 3) is being made in the time action in accordance with regulations of this cloth-cutting apparatus.

On support portion 12, be provided with and put the cloth pushing table 13 that cloth is made thing F, on this cloth pushing table 13, be provided with the presser feet 36 of pushing down the buttonhole both sides of making thing F.

Cloth pushing table 13 is flat rectangular box for integral body, is driven by X-axis pulse motor 119 and Y-axis pulse motor 123 (Fig. 7), and (X) direction and front and back (Y) direction move to the left and right.

This cloth pushing table 13 under the state of locating on the origin position of regulation, above-mentioned rag knife with hold cutter platform 30 and be set on the position of subtend up and down that the predetermined formation Button position of making thing F on be placed on it puts.When making, on this position, form buttonhole earlier.

Then, by operation firing switch 134, drive cloth pushing table 13 from origin position forwards make the starting position move and make on the cloth pushing table 13 make thing F relatively move eedle 18 under necessary position on.Eyelet around the buttonhole H is that the w2 of portion is sewn to the left side eyelet w3 of portion through circle eye eyelet, stitches the order of the straight line bolt-lock seam w4 of portion at last and makes by the bottom from the w1 of right side eyelet portion of Fig. 9 (a).In order to make in proper order by this, cloth pushing table 13 at first begins to move from the above-mentioned starting position of making of Y direction, forwards move earlier, (leading section of circle eye h1) arrives the state corresponding to eedle 18 up to the summit that makes buttonhole H, rearward turns back to and make sewing finishing position much at one, starting position then.

The displacement of the position (being called the final position) of the cloth pushing table 13 during corresponding to eedle 18 states is certain value to the summit that makes buttonhole H from the origin position of cloth pushing table 13, such as being set at 64mm.Therefore, arrive the displacement make beginning (terminations) position because of buttonhole H make length (the ml value of Fig. 9 (a)) difference, long more just short more, short more just long more.

Make an end, cloth pushing table 13 returns origin position with regard to controlled from the sewing finishing position, simultaneously, in the present embodiment when putting cloth and make thing F, is to put the cloth position to what cloth pushing table 13 moved to regulation.

On Buttonhole machine controlled by sewing machine 10, be provided with duplicate device for cutting lower thread with Fig. 2.Below, be located at the device for cutting lower thread 37 on the Buttonhole machine controlled by sewing machine 10 according to Fig. 2～Fig. 4 explanation.

That is, on cloth pushing table 13, fixing the installation secondary station 40 that installs and fixes cutting knife, fixed cutting tool installing plate 42 is being housed in the left part of this installation secondary station 40.Rearward end at this fixed cutting tool installing plate 42 is being screwed fixed cutting tool 44, and its free end stretches out to bottom line 38 and heart yearn 34 directions.Fixed arm 48, can clip bottom line 38 and heart yearn 34 and with pivot pin 46 neatly level joltily pivot and be bearing on the cloth pushing table 13.

Be screwed the movable cutting knife 50 towards fixed cutting tool 44 on this fixed arm 48, its free end stretches out to bottom line 38 and heart yearn 34.On the free end of movable cutting knife 50, be formed with two recess 50a, 50b up and down, when because of the shaking of fixed arm 48, movable cutting knife 50 when fixed cutting tool 44 moves, hook heart yearn 34, hook bottom line 38 by the recess 50a of upside, bottom line 38 and heart yearn 34 are separated reliably by the recess 50b of downside.

Fixed arm 48 cuts off cylinders 30 (Fig. 7) and drives by being located at bottom lines below the cloth pushing table 13, and being the center with pivot pin 46 shakes between as shown in Figure 2 position of readiness and off-position shown in Figure 3.

And, movable cutting knife 50 fixed arm 48 from position of readiness to the process that off-position is shaken, hook heart yearn 34 and bottom line 38 with recess 50a, 50b, the side (face towards the rear) of simultaneously movable cutting knife 50 contacts with the free end of fixed cutting tool 44, and bottom line 38 and heart yearn 34 are cut off.

In addition, the clamping device 55 that is provided with on the secondary station 40 by fixed head (bottom line clamp fixed head) 56 formations is being installed.That is, on installation secondary station 40, be provided with the elongated fixed head 56 of its length direction along fore-and-aft direction.

Be screwed heart yearn clamp 58 above the fixed head 56 at this, by it flexibly clamping heart yearn 34 between fixed head 56.In addition, below fixed head 56, be screwed bottom line clamp 60, by it flexibly clamping bottom line 38 between fixed head 56.

On bottom line clamp 60, be provided with the clamp pin 62 that runs through fixed head 56 and heart yearn clamp 58 and stretch out upward of protrusion, grab pin 62 rear end of bottom line clamp 60 is opened with respect to fixed head 56 by pressing this downwards.

Constituted hold assembly by above fixed head 56 and heart yearn clamp 58 and bottom line clamp 60.

And, thereby on fixed arm 48, be provided with in the time of will cutting off line and the clamp pin 62 of bottom line clamp 60 is abutted against the clamp release (releasing parts) 64 that breaks away from the switching carry out bottom line clamp 60.Clamp release 64, its base portion 66 props up on fixed arm 48 at the pivot of slotted hole 67, the 67 usefulness hold-down screws 68 of pivot pin 46 tops, intermediate portion, simultaneously, extends operating member 65 from base portion 66 to the direction of stretching out of movable cutting knife 50.

The following height of operating member 65 is set lowlyer than the upper end of clamp pin 62 that is in closure state at bottom line clamp 60, and when below this operating member 65 during with the last end in contact of clamp pin 62, bottom line clamp 60 is in open state (Fig. 4).Because its opening, bottom line 38 can insert between fixed head 56 and the bottom line clamp 60 sleekly, and on the contrary, as if discharging under the clamped state of bottom line 38, then bottom line 38 can be decontroled.

On the side relative on the operating member 65 with movable cutting knife 50, be formed with when movable cutting knife 50 is in the position that will arrive before the off-position with clamp pin 62 corresponding recess 65a, promptly, the clamp pin 62 of being depressed by operating member 65 and bottom line clamp 60 being opened, when arriving with the corresponding position of recess 65a because of moving of clamp release 64, just disengaging makes bottom line clamp 60 be closure state below clamp release 64.So guarantee the state that the bottom line 38 between fixed head 56 and bottom line clamp 60 is held before cut-out.

Below, rotating shuttle portion 20 and the rotating shuttle support 70 that constitutes rotating shuttle device of the present invention is described according to Fig. 5, Fig. 6.Rotating shuttle support 70 constitutes each parts on the main body 71 by assembling and one, that is, the 71a of annulus portion, installing plate 71b, supporting frame 71c and axial region 71d constitute.

In support portion 12, be provided with the support 12a of band circular hole, in circular hole, can embed the 71a of annulus portion flexibly rotationally and can support rotating shuttle support 70 flexibly rotationally, top at the 71a of annulus portion is provided with installing plate 71b, and being provided with in the bottom of the 71a of annulus portion is up and down the supporting frame 71c of the slightly rectangular frame shape of length.Be provided with axial region 71d in the bottom of supporting frame 71c.On axial region 71d, belt pulley etc. is housed, on this belt pulley, hangs with the synchronous belt (omitting diagram) that rotating shuttle support 70 and shank 25 are rotated around vertical axis synchronously.Rotating shuttle support 70 and rotating shuttle portion 20 can the initial rotation position be that 0 degree rotates 180 degree when making.

On installing plate 71b, is furnished with rotating shuttle portion 20.This rotating shuttle portion 20 has the spreader 27,27 of rotating shuttle 26,26 and auxiliary this rotating shuttle 26,26 and has the tongue piece portion 22 of pin hole and upper thread cutting knife 28 etc.

In the inside of supporting frame 71c, be provided with the rotating shuttle spreader driving mechanism that constitutes by rotating shuttle driving shaft 23 and spreader driving shaft 24 etc.That is,, simultaneously, rotating shuttle driving shaft 23 in, dispose the spreader driving shaft 24 of tubulose along the rotating shuttle driving shaft 23 of the pivot of rotating shuttle support 70 configuration tubulose.And spreader driving shaft 24 stretches out more upward than rotating shuttle driving shaft 23.

In addition, in spreader driving shaft 24, be installed with the bottom line 38 (representing) that leads to tongue piece portion 22 pin holes from the lower end of spreader driving shaft 24 to the upper end with thick chain-dotted line from not shown suture supply source.In addition, the bottom of rotating shuttle driving shaft 23 and spreader driving shaft 24 is passed and is stretched out to the below of rotating shuttle support 70 in the axial region 71d, links to each other with not shown lower shaft by not shown transmission mechanism.

Rotating shuttle driving shaft 23 is connected with the bottom of rotating shuttle drive rod 23b by rotating shuttle driving shaft guide bracket 23a.The upper end of rotating shuttle drive rod 23b is connected with rotating shuttle erecting bed 23e, on this rotating shuttle erecting bed 23c rotating shuttle 26,26 is housed.Rotating shuttle 26,26 is given in the reciprocal oscillating motion and the transmission that are transformed into regulation with moving up and down of this rotating shuttle driving shaft 23.

The upper end of spreader driving shaft 24 is connected with the bottom of spreader drive rod 24b by spreader driving shaft guide bracket 24a.The upper end of spreader drive rod 24b is connected with the spreader action cam 24c that makes spreader 27,27 actions, and spreader 27,27 is given in the reciprocal oscillating motion and the transmission that are converted to regulation with moving up and down of this spreader driving shaft 24.

In addition, in supporting frame 71c, be provided with from the upper end of spreader driving shaft 24 to the bottom line path of the side directed bottom line 38 of the pin hole of tongue piece portion 22 one 76 and be located at the bottom line line falling device 80 that falls bottom line 38 midway of bottom line path portion.

Bottom line path portion 76 is by the frame section 76a that is contained in supporting frame 71c front side, be contained in each parts on this frame section 76a, take out wire spring 76b, the line adjuster 76c, the 1st 76d of hanging wire portion that adjust disc type and second 76e of hanging wire portion etc. for the bottom line of torque spring constitutes.

The coiler part that bottom line is taken out wire spring 76b is rotatably supported on the frame section 76a, the one end is fixed on the frame section 76a, stretch out upward more longways the other end, limits it by limiting part 76g on the way and move to application of force direction (Fig. 5 is right-hand), and its front end forms ring-type simultaneously.

Bottom line 38 is extracted out from the upper end of spreader driving shaft 24, hang over the Outboard Sections of first 76d of hanging wire portion and towards downside, after striding bottom line 38 on the Outboard Sections that hangs over second 76e of hanging wire portion then, between 2 adjustment dishes that constitute line adjuster 76c, then, bottom line 38 is hung over the inside portion of second 76e of hanging wire portion, hang over the inside portion of first 76d of hanging wire portion again.Then, bottom line 38 passes the ring portion that bottom line is taken out wire spring 76b, passes the top direction that the penetration pipe 76f that is contained on the 71a of annulus portion guides rotating shuttle support 70 into again, passes the pin hole of tongue piece portion 22 through rotating shuttle 26, continues to guide into the sewn object on the needle plate 19 again.

Simultaneously, line adjuster 76c applies tension force to bottom line 38 under closure state, and the floating slice 74b of the float plate 74 on being fixed on bottom line line falling plate 84 described later just decontrols bottom line 38 when inserting between the adjuster dish.

Bottom line line falling device 80 is the bottom line line falling 80a of mechanism that is made of bottom line line falling plate 84 and action lever 85 etc. and constituting for cutting off the cylinder 92 (aftermentioned) that upper thread establishes as bottom line line falling driving mechanism.Because bottom line line falling device 80 is devices of lax bottom line 38 in advance when being used for consuming bottom line 38 beyond make, thus when cloth pushing table 13 move and bottom line cuts off and falls loose bottom line 38 before bottom line 38 is consumed in the action.Remain aftermentioned about time of line falling.

Bottom line line falling plate 84 is that extension 84c that stretches out by base portion 84a, to the top of base portion 84a and the bottom line line falling 84b of portion that hangs with bottom line 38 on it constitute,

Base portion 84a combines with the rotating shaft 86 that can carry it flexibly rotationally by the bearing portion (not shown) of supporting frame 71c lower end, common rotation flexibly.And, on base portion 84a, be provided with circular-arc slotted hole 84e, combine with the action lever 85 that is running through rotating shaft 86 by the hold-down screw 87 on this slotted hole 84e, action lever 85 is fixed on the pedestal 84a.That is, bottom line line falling plate 84 and action lever 85 are to be the axle center with rotating shaft 86, rotate in being parallel to the figure paper plane of Fig. 5 integratedly with rotating shaft 86.

The leading section 85a of action lever 85 protrudes to foreign side, is positioned at the outside of the rotation track of rotating shuttle support 70.

Hang over the another one end that upper thread cuts off the back-moving spring 81 (bottom line line falling spring) on the movement arm 28a hanging with an end on the action lever 85.81 pairs of bottom line line fallings of back-moving spring plate 84 and action lever 85 are applied to the anticlockwise pulling force that resets among Fig. 5.

In addition, on the bottom line line falling 84b of portion, have slotted hole 84d, wherein be passed between the 1st 76d of hanging wire portion and the penetration pipe 76f by bottom line take out wire spring 76b tensioning bottom line 38.

Pressing line disk float plate 74 is by being installed in the above-mentioned rotating shaft 86 rotatably and being fixed on the base portion 76a on the base portion 84a of bottom line line falling plate 84 by slotted hole 74c and constituting from the pressing line disk floating slice 74b that this base portion 74a stretches out.Pressing line disk floating slice 76b is configured in its leading section and is positioned on the position under the line adjuster 76c.

And when the pulling force that overcomes back-moving spring 81 when bottom line line falling plate 84 clockwise rotated, pressing line disk floating slice 74b was moved upward, and pressing line disk floating slice 74b inserts between two disks of clamping bottom line 38 of line adjuster 76c.Remove tension force like this to bottom line 38.

From the original state of Fig. 5, when with drive transmitting described later portion 99 during to the leading section 85a of pressing action lever 85, bottom line line falling plate 84 moves in the direction of the clock simultaneously with action lever 85.Therefore, bottom line 38 stretch-draw to the right on the slotted hole 84d that hangs over the bottom line line falling 84b of portion.Because as described above, removed the tension force of line adjuster 76c this moment, therefore, can pull out bottom line for line source from suture.In a single day remove the downward pressure of the leading section 85a of action lever 85 under this state, then back-moving spring 81 makes bottom line line falling plate 84 and action lever 85 return original state, and bottom line 38 is lax.

Below, surface thread cut-off device 90 is described.Surface thread cut-off device 90 cuts off movement arm 28a etc. and is made of the upper thread cut-out driving mechanism of forming support portion 12 in, along each parts of fore-and-aft direction assembling 91 by being located at upper thread cutting knife 28 in the rotating shuttle portion 20, upper thread.

As shown in Figure 5, upper thread cuts off movement arm 28a and can be installed in freely to rotate on the installing plate with respect to installing plate 71b, and upper thread cutting knife 28 is equipped with on the top that cuts off movement arm 28a at this upper thread.In addition, in Fig. 5, omitted the part of surface thread cut-off device 90.In Fig. 6, simplified rotating shuttle support 70 grades, represented support portion 12 with double dot dash line.

Cut off on the movement arm 28a at upper thread, hang with an end of bottom line line falling back-moving spring 81, apply the power of rotating by this back-moving spring 81 and make upper thread cutting knife 28 be positioned at the cut-out position of readiness of regulation to clockwise direction.

On upper thread cut-out movement arm 28a, be provided with protuberance 28c, cut off the driving mechanism 91 downward 28c of belling portion by upper thread and make upper thread cut off movement arm 28a, make upper thread cutting knife 28 carry out upper thread cut-out action like this to counterclockwise rotating.

Upper thread cuts off driving mechanism 91 by cutting off the formations such as cylinder (upper thread cut-out cylinder) 92, upper thread cut-out connecting rod 93, upper thread cut-out driving shaft 94 and line ball portion 95 that upper thread is used.

The base end side of cylinder 92 can be bearing in rotationally flexibly with hold-down screw 96a and is fixed on the cylinder bracket 96 in the support portion 12.In addition, cylinder 92 can make and be contained in its anterior cylinder bar 92a advance and retreat, and the overhang of cylinder rod 92a is generally definite value.

Leading section at cylinder rod 92a is connected with the end that the rotating upper thread that slightly is the T font cuts off connecting rod 93 by cylinder toggle 97.Upper thread cuts off the pars intermedia of connecting rod 93, can be bearing in rotationally on the support 12 flexibly by rotating shaft 93a.In addition, on the upper thread cut-out driving shaft 94 that almost extend up and down on the edge, fixing the axle abut 94a that passes this driving shaft 94, the other end that upper thread cuts off connecting rod 93 links with this abut rotationally with respect to this abut 94a, so, upper thread cuts off connecting rod 93 and is supporting upper thread cut-out driving shaft 94 from the inboard of Fig. 6.The upper end that cuts off driving shaft 94 at upper thread is provided with line ball portion 95.And, line ball portion 95 is set to when rotating shuttle support 70 is positioned at the rotational angle of 180 degree, line ball portion 95 overlaps with the protuberance 28e of upper thread cutting knife 28.

Cut off the bottom of driving shaft 94 at upper thread, fixing with screw 98a, 98a and is inserting the fixed part 98 that upper thread cuts off driving shaft 94, and fixing the upper thread cut-out driving shaft 94 that is plate-shaped member with respect to axle fixed part 98 and passing wherein drive transmitting portion 99.

Cut off driving mechanism 91 according to upper thread, the driving force of cylinder 92 makes line ball portion 95 cut off moving up and down of driving shaft 94 with upper thread and action simultaneously.

That is, as shown in Figure 6, when cylinder 92 was in by (Off) state, cylinder bar 92a was pushed out, and at this moment line ball portion 95 is in the state that stops at top dead-centre.In addition, when cylinder 92 became connection (On), then cylinder bar 92a withdrawal moved line ball portion 95 downwards because upper thread cuts off the anticlockwise rotation of connecting rod 93, up to reaching the bottom dead centre state.At this moment, if rotating shuttle support 70 is positioned at the turned position of 180 degree, then line ball portion 95 just presses downwards and states protuberance 28c, is positioned at upper thread cutting knife 28 actions of cutting off position of readiness, cuts off upper thread.Then, cylinder 92 becomes cut-off state, and line ball portion 95 moves to top dead-centre, and the pulling force by means of the above-mentioned back-moving spring of upper thread cutting knife 28 makes upper thread cutting knife 28 get back to the cut-out position of readiness again simultaneously.

Drive transmitting portion 99 is tabular parts, almost vertically is assemblied in the top of the leading section 85a of action lever 85 with the rotating shaft of rotating shuttle support 70.And, below drive transmitting portion 99 with between the leading section 85a of action lever 85, separate certain interval relatively along the vertical direction.

Drive transmitting portion 99 sees that from above-below direction the rotating shaft with rotating shuttle support 70 is that the center slightly is crescent moon shape (slightly being the C font), surrounds rotating shuttle support 70 with the circular-arc edge part of its inboard.And, make inner edges form the center of circular arc and the center of rotation basically identical of rotating shuttle support 70.Simultaneously, be accompanied by the rotation of rotating shuttle support 70, the rotary motion trace of the leading section 85a of action lever 85 along the outside of the inside edge portion of drive transmitting portion 99, the circular motion of the inboard of outer ledge portion.

Rotating shuttle support 70 is positioned at the turned position of 0 degree substantially when making beginning, almost reach 180 degree during sewing finishing.During this period, the first end 85a and the drive transmitting portion 99 of action lever 85 overlap at above-below direction always.

And, when upper thread cut-out driving shaft 94 moves up and down, drive transmitting portion 99 also move up and down together and with moving that the leading section 85a of action lever 85 contacts, leaves, if to be in when connecting drive transmitting portion 99 mobile when cylinder 92, then be bound to press leading section 85a downwards.That is, irrelevant with the rotational angle of rotating shuttle support 70, if drive transmitting portion 99 moves, be bound to press the leading section 85a that makes lever 85 downwards.If press leading section 85a downwards, just can carry out above-mentioned bottom line line falling operation.That is cylinder 92 double as bottom line line falling driving mechanism in the present invention.

Fig. 7 is the schematic diagram of the control circuit 110 of Sewing machines 10.Control circuit 110 is by CPU11, ROM112, RAM113 and interface 114,115 ..., formation such as various drive circuits, guidance panel 150, starting button 134.

In ROM (read-only storage) 112, write and carry out control program and the control data that lockhole is made.

RAM (random access memory) 113 is storing a plurality of graph datas (lockhole control data), can store simultaneously a graph data of selecting by guidance panel 150, in addition, store the value of this change in the time of can also working as the data items value that changes in the graph data.And RAM113 also has the function of the memory space that uses for the moment when various processing the in making is provided.In addition, also can store the stitch data (aftermentioned) that generates by graph data.

CPU (central processing unit) 111 controlled a series of processing relevant with buttonhole according to control program and the control data of ROM112.

CPU111 is connected with guidance panel 150 by interface 114, and the demonstration on the control operation panel 150 simultaneously, is accepted to pass through the signal that guidance panel 150 is imported, and carries out the selection change etc. of various settings.The operator passes through the graph data that guidance panel 150 is selected as shown in Figure 8, and can change the numeral of each data items of selected graph data.Remain aftermentioned about guidance panel 150.

And CPU111 is connected with main axle servo motor-drive circuit 116 by interface 115, the rotation of control driving main shaft servomotor 117.Main axle servo motor 117 drives the lower shaft (not shown) of going up axle (not shown) and rotating shuttle spreader driving mechanism being moved that eedle 18 is moved up and down.

In addition, CPU111 is connected with X-axis pulse motor drive circuit 120 by interface 118, be connected with Y-axis pulse motor drive circuit 122 by interface 121 simultaneously, drive controlling X-axis pulse motor 119 and Y-axis pulse motor 123 drive the direction of cloth pushing table 13 to regulation.

CPU111 is connected with Z axle pulse motor drive circuit 125 by interface 124, and control drives Z axle pulse motor 126.

On Buttonhole machine controlled by sewing machine 10, the rotation of main axle servo motor 117 is to be delivered to shank 18 and rotating shuttle spreader driving mechanism, make moving up and down and eedle balancing point synchronized movement action of rotating shuttle 26,26 and spreader 27,27 and shank 11, form stitch being put in making on the thing F on the cloth pushing table 13.

In addition, shank 11 and rotating shuttle support 70 with have Z axle pulse motor 126 and synchronous belt 31 rotating mechanism and be connected with power transmission shaft 32 (Fig. 1 (b)) etc.When being radial eyelet around the circle eye eyelet w2 of portion, rotate synchronously by this rotating mechanism driving eedle 18 and rotating shuttle portion 20.

CPU111 cuts off air cylinder driven circuit 128 by interface 127 and bottom line and is connected, and control drives bottom line and cuts off cylinder 30.And, cut off air cylinder driven circuit 130 by interface 129 and upper thread and be connected, drive upper thread and cut off cylinder 92, carry out aforesaid upper thread cut-out and bottom line line falling operation.

CPU111 by interface 131 with cut cloth motor-drive circuit 132 and be connected, control drives cuts cloth motor 133.

And CPU111 is connected with firing switch 134 by interface 114, and when from firing switch 134 input initiating signals, moment driving main shaft servomotor 117 in accordance with regulations etc. carry out the lockhole limit, cut cloth processing and upper thread bottom line cut-out processing.

According to Fig. 8 and Fig. 9 the data that are stored among the RAM113 are described.Fig. 8 (a) is the table t1 of the presentation graphic data when carrying out buttonhole.Can store 9 kinds of graph datas at this, a graph data has 1～9 data items.

Data items 1 is used to set the shape of round eye h1.Shown in Fig. 9 (b), the size of circle eye h1 is defined as width e w and length el, ew and el are combined as the pre-tabulation t2 storage shown in the figure (8).In data items 1, from No.1～No.5 of table t2, select numeral to set.

The data items 2～6th of Fig. 8 (a), the pin number of each one of formation bight shown in relevant Fig. 9 (a) and the data of length.That is, data items 2 is that total length (ml), the data items 3 of buttonhole are that pin number (ln), the data items 4 of parallel portion h2 both sides is that the pin number (en) around the circle eye h1, edge of a knife gap (ls of Fig. 9), the data items 6 that data items 5 is parallel portion h2 are edge of a knife gaps (es of Fig. 9) of circle eye h1.

Data items 7 is relevant with the size of straight line bolt seam w4.The size of straight line bolt seam w4 with width cl and longitudinal length ew regulation, is combined into cl and ew, stores as the pre-tabulation t3 shown in Fig. 8 (c).In data items 7, from table t3, select the numeral of No.1～No.n.

Data items 8 is to set the project of whether carrying out the 2nd bottom line line falling shown in Figure 11 described later.In addition, data items 9 is to set the project of whether carrying out the line falling of the 4th bottom line.Related content remains aftermentioned.

On Buttonhole machine controlled by sewing machine 10, can read setting with guidance panel 150 about the size and the shape that form lockhole.

As the guidance panel 150 of selection mechanism of the present invention, number selection portion 152, data items selection portion 153, data value configuration part 154 and data setting switch 155 by as shown in figure 10 preparation key 151, figure and constitute.

Figure numbering selection portion 152 is for selecting the figure numbering to establish, showing current selected figure numbering (being " 1 " on Figure 10) at figure display part 152a.Can with below the figure display part 152a+key 152b ,-key 152c changes numeral singly in 1～9 scope, in order to select different graph datas.

Data items selection portion 153 is the selection portions that are used for selecting the data items of the graph data selected by figure numbering selection portion 152.The data items (being " 1 " on Figure 10) that on project display part 153a, shows current selection.Can with below the project display part 153a+key 153b ,-key 153c changes numeral successively, selects different data items in 1～9 scope.

In case on data items selection portion 153, selected data items, then can on the numerical value display part 154a of data value configuration part 154, show the numeral that presets of relevant this data items.Can with below the numerical value display part 154a+key 154b ,-key 154c according to the numeral on the interval increase and decrease numerical value display part 154a of regulation, changes numerical value within the limits prescribed.

Data setting switch 155 is the console switch when carrying out the data setting operation.That is, when pressing data setting switch 155, can change value data.In addition, press selection and the change that data setting switch 155 has just been determined projects and numeral once more.

Preparing key 151 is after setting operation finishes, and the corresponding data value of setting makes the switch of stitch data.

Below, have the action of the Buttonhole machine controlled by sewing machine 10 of above-mentioned formation according to the flowchart text of Figure 11.

This generalized flowsheet for example is when the main power source of Sewing machines (not shown) is connected.And, put cloth putting on the cloth position at defined making thing F.

At first, judge in step S1 whether prepare key 151 is operated.If be not operated then this judgement repeatedly,, will in step S2, make stitch data if be operated.Making of this stitch data is data content according to selecting graph data, is the data that the drive source of driving main shaft servomotor 117 grades makes, and wherein comprises the pin data etc. that fall of the needle downing position that determines eedle 18.

Then, in step S3, cloth pushing table 13 is moved on to origin position from putting the cloth position.

Then, monitor in step S4 whether firing switch 134 is on-states, if on-state just shifts to step S5.In step S5, carry out driving the processing of holding cutter platform 33,, in step S6, carry out cloth pushing table 13 to making the processing that move the starting position then to form buttonhole hole H by cutting cloth motor 133.

Then, in step S7,, carry out buttonhole and make, finish at step S8 lockhole according to above-mentioned stitch data driving main shaft servomotor 117, X-axis pulse motor 119, Y-axis pulse motor 123, Z axle pulse motor 126.At this moment, cloth pushing table 13 is in and makes essentially identical sewing finishing position, starting position.

In the stage that this lockhole finishes, cylinder 92 is in cut-off state, and rotating shuttle support 70 has changeed 180 degree from origin position, and line ball portion 95 overlaps along the vertical direction with the protuberance 28c of upper thread cutting knife 28.

Then, in step S9, cylinder 92 becomes on-state, by upper thread cut off connecting rod 93, upper thread cuts off driving shaft 94, makes the 28c of belling portion downwards of line ball portion 95, by upper thread cutting knife 28 upper thread is cut off.Simultaneously, as mentioned above, press action lever 85 by the driving force of cylinder 92 bottom line line falling plate 84 is rotated.Like this, disk float plate 74 is moved upward, and disk floating slice 74b inserts between two disks of line adjuster 76c, and the tension force that is applied on the bottom line 38 is disarm state, pours out bottom line 38 (the 1st line falling) by the bottom line line falling 84b of portion of bottom line line falling plate 84 from the side that winds the line.

Then, after the bottom line 38 that falls was over, cylinder was cut-off state, made upper thread cutting knife 28 return the cut-out position of readiness by means of the pulling force of back-moving spring 81, simultaneously drive transmission member 99 is got back to the top dead-centre of original state, returns original state by means of the pulling force bottom line line falling device 80 of back-moving spring 81.

Then, in step S10, cloth pushing table 13 begins to return from the sewing finishing position moving of origin position.The mobile needs of this cloth pushing table 13 will arrive the bottom line rupturing operation time before of step S15 described later.

Then, in step S11, be positioned at the 180 rotating shuttle supports 70 of spending turned positions and go back to 45 degree to the initial point direction.Like this, in order to cut off bottom line, bottom line 38 and heart yearn 34 are separated with the stage portion (not shown) of needle plate 19.

Secondly, in step S12,, judge whether to carry out bottom line and cut off preceding the 2nd bottom line line falling operation according to the setting of the data items 8 of showing t1.

Data items 8 can be set according to following reason.As previously mentioned, the amount of movement of cloth pushing table 13 from origin position to the sewing finishing position, because of the length (above-mentioned ml value) of button hole H different, long more just short more, short more just long more.So from step S10 begin mobile to cloth pushing table 13 to returning of origin position, its distance changes with the length (above-mentioned ml value) of button hole H.In addition, because of moving of cloth pushing table 13, on presser feet 36, be in the making thing F and move of stationary state also bottom line 38 tensions.But, because bottom line 38 has been fallen to come out in step S9, so when the amount of movement of cloth pushing table 13 is not oversize, even the thing F that makes of the bottom line 38 of ining succession moves and also can not make bottom line 38 and spur cloth.And, if amount of movement is short, when in step S15, cutting off bottom line, also can provide the consumption of bottom line 38, can after cut-out, not produce stronger tension force to bottom line 38, can not be pulled to cloth one side yet.

But, when the amount of movement of cloth pushing table 13 is big, that is, in the eyelet of step S7, when above-mentioned ml value in short-term, the amount of movement of the cloth pushing table 13 that begins from step S10 is just elongated, the line falling amount of step S9 is just not enough.At this moment, the operator is set at " having " in the bottom line line falling of making short following the above-mentioned data items 8 of situation of length.Then,, just in step S13, under the situation of cylinder 92, pour out bottom line 38, then under cut-off state, unclamp and shift to step S14 with bottom line line falling device 80 for connection if be " having " at step S12 data items 8.Pour out bottom line 38 at step S13 like this, when just can corresponding cloth pushing table 13 moving and the consumption of the bottom line of next procedure when cutting off.

When the amount of movement of cloth pushing table 13 do not have so much, when data items 8 is set at " nothing ", just do not move to step S13 from step S12, that is, do not carry out bottom line line falling operation and directly shift to step S14.

In step S14, cylinder 92 to be connected, the clockwise direction that driving bottom line line falling plate 84 is pressed on Fig. 5 rotates, and pours out tension with this bottom line 38.Under this tension, shift to step S15.

In step S15, on the device for cutting lower thread under the wait state of Fig. 2 37, connect bottom line and cut off cylinder 30, Yi Bian make movable cutting knife 50 on recess 50a, 50b, hook heart yearn 34, bottom line 38 respectively like this, Yi Bian to counterclockwise rotating.Movable cutting knife 50 1 is near fixed cutting tools 44, and the operating member 65 of the clamp release 64 that rotates simultaneously with movable cutting knife 50 is just pressed clamp pin 62 downwards, with this with clamping device 55 respectively heart yearn 34 and bottom line clamping.Just having clamped the movable cutting knife 50 in back contacts with fixed cutting tool 44 immediately heart yearn 34 and bottom line 38 cut-outs.

Secondly, in step S16 cylinder 92 is disconnected, the bottom line line falling plate 84 of tensioning this moment bottom line 38 turns back to holding state, in order to loosen bottom line 38 (the 3rd time).Thereafter, in step S17 bottom line is cut off cylinder 30 and turn off, movable cutting knife 50 and clamp release 64 rotate to clockwise direction and return the origin-location.At this moment, operating member 65 is depressed clamp pin 62 once more and is made clamping device 55 (hold assembly) be the state that can discharge bottom line 38 in a flash, because bottom line 38 is relaxed states so can not come off from clamping device 55.

Then, in step S18, lift, in addition rotating shuttle support 70 another mistakes are changeed 135 degree and make its rotational angle get back to 0 degree making the presser feet 36 that thing F is pressed on the cloth pushing table 13.

Then, in step S19, for making of next time cloth pushing table 13 moved to and to put the cloth position.The clamping device 55 that this moment, bottom line 38 was fixed on the cloth pushing table 13 clamps, move simultaneously with cloth pushing table 13 then, the bottom line 38 that come out from rotating shuttle portion 20 sides this moment is tightened up, but owing in step S16, relax, so bottom line 38 can not be subjected to undue pulling force and deviate from from clamping device 55.

Secondly, the setting content according to above-mentioned data items 9 in step S20 judges whether to carry out the line falling of the 4th bottom line.If data items 9 is " having ", just shift to step S21, here, drive cylinder 92 and carry out bottom line line falling operation, this processing finishes.If judgment data project 9 is set as " nothing " in step S20, then intactly finish this processing.

This data items 9 is to consider the amount of movement of the cloth pushing table 13 when make next time and set the project of whether carrying out line falling.That is,, move to origin position, and then move to from origin position and to make starting position (the step S3 of Figure 11, S6) from putting the cloth position making when beginning.Though is certain from putting the cloth position basically to the amount of movement of origin position, but make length (ml value) and change according to project 8 is described to the mobile factor of making the starting position from origin position, and the degree that is clamped in the bottom line 38 suffered stretch-draw on the clamping device 55 on the cloth pushing table 13 also changes.At this, the operator considers next process, if it is short to make length, and amount of movement is long, establishes on data items 9 " having ", and on the contrary, the length of seam is long and amount of movement is short, then under the sufficient situation of line falling amount of step S16, sets " nothing ".

And, in step S13, S14, S21, cylinder 92 is connected bottom line, rotating shuttle support 70 is rotated after 45 degree, because rotating shuttle support 70 not in the turned position of 180 degree, does not cut off action so upper thread cutting knife 28 does not carry out upper thread.

And, because not being setting content according to data items 8, judgement in step S12 do not carry out, so the amount of movement of the cloth pushing table 13 of step S10 is original value, also can automatically judge according to making length m l value by CPU 111.At this moment, preestablished a reference value A and with make length m l relatively, if ml＜A then carries out second time of bottom line.

In addition, because not being the setting content according to data items 9, judgement in step S20 do not carry out, so when next process begins is original value from cloth pushing table 13 from origin position to the amount of movement of making the starting position, also can automatically judge according to making length m l by CPU 111.In this case, predefined a reference value B, and with make length m l relatively, if ml＜B then carries out the 4th and falls bottom line.

This kind judges that automatically structure has very high convenience.

According to above Buttonhole machine controlled by sewing machine 10, as shown in figure 11, at first in step S14, bottom line 38 is pulled out, with device for cutting lower thread 37 bottom line 38 cut off under this state by bottom line line falling plate 84, then bottom line line falling plate 84 is resetted, unclamp bottom line 38 and close device for cutting lower thread 37, make movable cutting knife 50 and clamp release 64 forward original position to.At this moment make the pressing plate of bottom line 38 be the abrupt release state by operating member 65.But bottom line 38 can not come off from clamping device 55 because of lax.

Promptly, because bottom line 38 relaxed before the pressing plate after bottom line cuts off discharged, even so the kind of bottom line and for the load of line side big the time bottom line 38 can not split away off from clamping device 55 (hold assembly) yet, in the making of subsequent processing, can not produce wire jumper and form good lockhole stitch smoothly.

And, because bottom line 38 is in the state of being strained by bottom line line falling plate 84 before cutting off, so, bottom line 38 is applied tension force to a certain degree thereby is easy to cut-out.In addition, bottom line line falling about step S13, S21, it is the amount of movement of considering cloth pushing table 13, carry out according to the content of the data items of setting by guidance panel 150 8, data items 9, so want corresponding amount of movement to pour out bottom line 38 fully, to prevent when cloth pushing table 13 moves, bottom line 38 being applied undue tension force.

Particularly according to step S13, if bottom line 38 is not applied undue tension force before cut-out, then when the clamping device after the cut-out 55 discharged, bottom line 38 also can be in relaxed state reliably.In addition, according to step S21,,, therefore can make each the parts miniaturization that constitutes clamping device 55 even also harmless a little less than the clamping force of clamping device 55 because the bottom line 38 that clamps with clamping device 55 is not applied undue pulling force.

Variation

In the above-described embodiments, about data items the 8, the 9th, select 1 graph data, the data in the graph data of having selected as setting the object of selecting, but as shown in Figure 12 and Figure 13, also can set the storage conversion of setting as with the irrelevant sewing condition of figure (memoryswitch).

Figure 12 (a) is the schematic diagram as the guidance panel (selection mechanism) 200 guidance panel, other example of Buttonhole machine controlled by sewing machine of the present invention.Figure 12 (b) sets the table t4 that shows storage conversion numbering content with guidance panel 200.This table t4 for example is stored among the ROM112.

Guidance panel 200 constitutes by preparing key 201, storage conversion numbering selection portion 202 and data value configuration part 203.

Preparing key 201 is the switches that are used to import storage conversion setting pattern, also is simultaneously to be used for switch that the content that is set by storage conversion setting pattern is stored.

Storage conversion numbering selection portion 202 is the selectors that are used to select to store the conversion numbering, shows the storage conversion numbering of current selection on storage conversion numbering display part 202a.Be arranged in below the storage conversion numbering display part 202a+key 202b ,-key 202c changes 1～8 numeral successively, can select different storage conversion numberings.

Data value configuration part 203 is the values that are used to set the storage conversion of being selected by storage conversion numbering selection portion 202, and shows the data value of current setting on numerical value display part 203a.And by below the operand value display part 203a+key 203b ,-key 203c, the numeral of numerical value display part 203a according to the rules interval is increased and decreased successively and changes its numerical value within the limits prescribed.

The content of storage conversion, the translational speed and the amount of movement of the Y cloth feeding direction when for example being relevant tangent line are well-known contents about No.1～No.6, so omission explanation in the present invention.

Storage conversion No.7 is the same with the data items 8 of above-mentioned table t1, be used for setting the content whether carry out the 2nd bottom line line falling (Figure 11, step S13), storage conversion No.8 is the same with above-mentioned data items 9, be used for setting the content of whether carrying out the 4th bottom line line falling (Figure 11, step S21).Whichsoever, if just be set at " 1 " if just be not set at " 0 ".

Figure 13 sets the schematic flow sheet of handling in storage conversion setting pattern.This processing is from connecting power supply on one side by preparing key 201 on one side.

This is handled once beginning then in step J1, in storage conversion numbering display part 202a demonstration " 1 ".Then in step J2 decision operation+key 202b ,-whether key 202c be operated, if were operated in step J3 according to its operation, the displaying contents of updated stored conversion numbering display part 202a enters step J4 successively.Be not operated if be judged as, then enter step J4 at step J2.And, the demonstration of corresponding stored conversion numbering display part 202a, the standard value of this numbering of demonstration on the numerical value display part 203a of data value configuration part 203.

In step J4 judgment data value configuration part 203+key 203b ,-whether key 203c be operated.If be operated, just the operation of corresponding step J4 each unit according to the rules upgrades the displaying contents of numerical value display part 203a and enters step J6 in step J5.Be not operated then enter step J6 if in step J4, be judged as.

Judge in step J6 whether prepare key 201 is operated, if be not operated then turn back to step J2, if the content that is operated then changes in the storage that step J7 sets step J2～J5 writes not shown EEPROM (Electrically Erasable Read Only Memory), finish this processing.

And the present invention is not only limited to the foregoing description, and the shape structure that it is concrete etc. can be done suitable change.

For example, line adjuster 76c also can be made of the so-called actual tension mechanism that uses electrical control such as solenoid, at this moment, the release conditions before also can intactly making beginning to the release conditions when the sewing finishing of the step S8 shown in the flow process of Figure 11 as next time.

1 Buttonhole machine controlled by sewing machine according to the present invention, at first, bottom line line falling mechanism comes into effect described compulsory exercise from original state and falls bottom line, under this state, use hold assembly clamping bottom line, cut off bottom line by device for cutting lower thread then, then make bottom line line falling mechanism be back to previous status, make bottom line lax after, make hold assembly be in the state that can discharge bottom line by releasing parts.At this constantly, never can from hold assembly, come off because bottom line is lax.

Promptly, because before the release conditions of clamping device, bottom line is in relaxed state, so, even bottom line can not come off from part on the clamping part yet when the kind of bottom line and line supply side load were big, wire jumper etc. can not take place, can successfully form good whipstitch yet in the making of subsequent processing.

And, because bottom line is in state by the line falling of bottom line line falling device before cutting off, thus to bottom line applied to a certain degree tension force and easier cut-out.

Whether 2 Buttonhole machine controlled by sewing machine according to the present invention can be selected be poured out bottom line and be made it lax by bottom line line falling device by selection mechanism before bottom line cuts off.Thereby, when the bottom line consumption is big, can select bottom line with selection mechanism, to prevent when cloth pushing table moves, bottom line being applied undue tension force.Simultaneously,, bottom line consumption short when amount of movement can be selected not carry out line falling after a little while by selection mechanism, can not carry out unnecessary bottom line line falling, and be lax excessively to prevent bottom line.

3 Buttonhole machine controlled by sewing machine according to the present invention can obtain and the present invention's 2 same effects, simultaneously, also can automatically determine, so have higher convenience.

4 Buttonhole machine controlled by sewing machine according to the present invention, if the origin position when making beginning is long to the cloth pushing table amount of movement of sewing position, the bottom line consumption that side is clamped on the clamping device of the device for cutting lower thread on the cloth pushing table is also big.According to this invention, can select whether whether to pour out bottom line and make it lax with selection mechanism with bottom line line falling device in order to make next time.Thereby, make when beginning when making the bottom line consumption big when next time because of moving, select bottom line with selection mechanism, in advance line is poured out, can prevent from when the cloth pushing table that make next time moves, bottom line to be applied undue tension force.In addition, what is called does not apply undue tension force to bottom line, can be the clamping force that weakens with hold assembly, can make each parts miniaturization that constitutes hold assembly.

, bottom line consumption short when amount of movement if select not line falling with selection mechanism, just do not carry out unnecessary bottom line after a little while, and be too lax to prevent bottom line.

5 Buttonhole machine controlled by sewing machine according to the present invention can be obtained and the present invention's 4 same effects, also can automatically determine simultaneously, therefore has higher convenience.

Claims (5)

1. Buttonhole machine controlled by sewing machine has:

Be arranged in the face of being arranged on the shank on the chain-drive section of sewing machine frame in the support portion and with the rotating shuttle device of described shank synchronization action;

By returning to previous status after the bottom line and make the lax bottom line line falling mechanism of bottom line and drive the bottom line line falling device that the bottom line line falling driving mechanism of bottom line line falling mechanism is formed to pour out;

Be located at cloth pushing table above the support portion, that carrying is made thing and moved at least between origin position and sewing position;

Be located on the described cloth pushing table, hold assembly is before and after the bottom line can to penetrate the bottom line state or discharges the device for cutting lower thread that the releasing parts of bottom line state constitutes to the hold assembly that cuts off back clamping bottom line and cutting off before cutting off by the movable cutting knife that cuts off bottom line with from bottom line;

This Buttonhole machine controlled by sewing machine carries out lockhole with the coordination of shank and rotating shuttle device and makes, and cuts off bottom line with device for cutting lower thread then, it is characterized in that:

When cutting off bottom line, make bottom line line falling mechanism action by bottom line line falling driving mechanism, clamping by hold assembly under the state of bottom line then, cut off bottom line by device for cutting lower thread, before becoming the state that makes hold assembly release bottom line by releasing parts, make bottom line line falling mechanism return to original state then by bottom line line falling driving mechanism.

2. Buttonhole machine controlled by sewing machine according to claim 1 is characterized in that:

Cloth pushing table moved to origin position from sewing position before the later bottom line of sewing finishing cuts off; And be provided with and before bottom line cuts off, select whether to pour out bottom line and make the lax selection mechanism of bottom line by bottom line line falling device.

3. Buttonhole machine controlled by sewing machine according to claim 1 is characterized in that:

Cloth pushing table moved to origin position from sewing position before the later bottom line of sewing finishing cuts off; According to the movable length from the sewing position to the origin position, whether decision was automatically poured out bottom line by bottom line line falling device and is made bottom line lax before bottom line cuts off.

4. Buttonhole machine controlled by sewing machine according to claim 1 is characterized in that:

When making beginning, cloth pushing table moves to sewing position from origin position; And be provided be chosen in bottom line and cut off after and for beginning next time to make when cloth pushing table is moved, whether pour out bottom line and make the lax selection mechanism of bottom line by bottom line line falling device.

5. Buttonhole machine controlled by sewing machine according to claim 1 is characterized in that:

When making beginning, cloth pushing table moves to sewing position from origin position; According to the movable length of making next time from the origin position to the sewing position, automatically determine after bottom line cuts off and, whether pour out bottom line and make bottom line lax by bottom line line falling device for beginning next time to make when cloth pushing table is moved.

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