CN101058923A - Keyhole sawing mechine - Google Patents
Keyhole sawing mechine Download PDFInfo
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- CN101058923A CN101058923A CN 200710093790 CN200710093790A CN101058923A CN 101058923 A CN101058923 A CN 101058923A CN 200710093790 CN200710093790 CN 200710093790 CN 200710093790 A CN200710093790 A CN 200710093790A CN 101058923 A CN101058923 A CN 101058923A
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- sewing machine
- upper thread
- button holing
- needle
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Abstract
The button holing sewing machine of the invention comprises: the top-and-bottom actuating device of the needle lever, which drives the needle lever that is used to install the sewing needle, makes it moving upward and downward; the lifting mechanism of the presser foot, which makes the presser foot upward and downward; the line-cutting component, which cuts off the upper thread after the needlework of the half cross-stitch; the upper thread holding mechanism, which holds the end of the upper thread which is formed after the line-cutting component cuts off the upper thread at the upside of the needle plate. The button holing sewing machine is also provided with the first air-ejecting mechanism, which is arranged at the opposite side of the upper thread holding mechanism relative to the sewing needle, is used to eject the pressured air to the upper thread holding mechanism.
Description
Technical field
The present invention relates to a kind of button holing sewing machine, this button holing sewing machine is when carrying out the sewing of buttonhole stitch, can spray forced air from an opposite side direction upper thread holding mechanism for suture needle, thereby will sew up buttonhole stitch from the upper thread end that the processing cloth stretches out with upper thread holding mechanism.
Background technology
In the prior art, when forming the tack buttonhole stitch with button holing sewing machine, the upper thread end that last buttonhole stitch sewing back can be cut off remains on the upper thread holding mechanism, and this upper thread end is sewed up next tack buttonhole stitch.
For example, the structure of the button holing sewing machine of being put down in writing in the TOHKEMY 2002-35459 communique (hereinafter referred to as patent documentation 1) is as follows,, makes presser feet elevating mechanism, upper thread shut-off mechanism and bottom line shut-off mechanism linkage work by bindiny mechanism that is.Pulse motor drives presser feet elevating mechanism, upper thread shut-off mechanism and bottom line shut-off mechanism through bindiny mechanism.When this button holing sewing machine begins in the sewing of tack buttonhole stitch, utilize the tangent line parts to keep the upper thread end.After the sewing of tack buttonhole stitch begins, the tangent line parts are switched to position in the sewing,, the tangent line parts are opened be in a pair of blade of closure state by the upper thread shut-off mechanism, decontrol the upper thread end, and the upper thread end that this quilt is decontroled is sewed up the tack buttonhole stitch.
With regard to the button holing sewing machine of being put down in writing in the patent documentation 1,, be positioned at tangent line parts that needle tracking forms direction and keep the upper thread end of stretching out at the suture needle rear side from the pin hole of suture needle in when beginning sewing.After the sewing beginning, decontroled by the tangent line parts by the upper thread end that the tangent line parts are kept, this upper thread end can be twisted or curl not necessarily to form on the direction at needle tracking and be extended straight because of beating of himself.
When not extending straight in the upper thread end, the upper thread end can be departed from needle tracking and be formed direction and then do not sewed up buttonhole stitch, thereby makes the profile variation of making, and needle tracking forms bad.Particularly when cloth was knitwear, when suture needle moved up and down, cloth can move up and down as wave.Therefore, having more existing cloth takeoffs the upper thread end and makes the upper thread end do not sewed up this situation of tack buttonhole stitch.In addition, the situation that the needle tracking width of needle tracking is little is also identical with above-mentioned situation in a zigzag, also how the situation that the upper thread end is not sewed up the tack buttonhole stitch can occur.
Summary of the invention
The object of the present invention is to provide a kind of button holing sewing machine, after decontroling during the upper thread end that is being kept by the line maintaining body when its sewing at buttonhole stitch begins is being made and constituted, also can sew up buttonhole stitch reliably being decontroled the rear wires end.
Button holing sewing machine of the present invention has: shank is driving mechanism up and down, and it drives the shank that suture needle is installed and this shank is moved up and down; The presser feet elevating mechanism, it moves up and down presser feet; The tangent line parts, it cuts off upper thread after the sewing of carrying out buttonhole stitch; Upper thread holding mechanism, it will be remained on the upside of needle plate by the upper thread end that the tangent line parts cut off.This button holing sewing machine also possesses the 1st air blow-off mechanism, and it is arranged on for suture needle, a side opposite with above-mentioned upper thread holding mechanism, and to above-mentioned upper thread holding mechanism ejection forced air.
Adopt said structure, even after next one sewing beginning, the upper thread end that relieving is cut off by the tangent line parts when a last sewing is finished and kept by the upper thread maintaining body, also can be by spray to the forced air of this upper thread end by the 1st air blow-off mechanism, make the upper thread end form direction towards needle tracking, the direction when this direction is kept by the upper thread maintaining body with it is identical.Therefore, can reliably the upper thread end that forms direction towards needle tracking be sewed up buttonhole stitch.
Description of drawings
Fig. 1 is the front view of the button holing sewing machine of an embodiment of the present invention.
Fig. 2 is the right view of button holing sewing machine.
Fig. 3 is the local enlarged front view of Fig. 1.
Fig. 4 is the local enlarged front view of Fig. 2.
Fig. 5 is the side view of explanation horn portion internal structure.
Fig. 6 is the vertical view of explanation horn portion internal structure.
Fig. 7 is the front view of explanation horn portion internal structure.
Fig. 8 be the upper thread shut-off mechanism want portion's vertical view.
Fig. 9 be the upper thread shut-off mechanism want partial side view of portion.
Figure 10 be tangent line parts and presser feet want portion's partial top view.
Figure 11 be tangent line parts and presser feet want partial side view of portion.
Figure 12 be tangent line parts and presser feet want portion's partial front elevation view.
Figure 13 be connected mechanism want partial perspective view of portion.
Figure 14 is the calcspar of button holing sewing machine control system.
Figure 15 is the flow chart of forced air ejection control.
Figure 16 is the vertical view of tack buttonhole stitch.
Tangent line parts when Figure 17 A is the sewing beginning and the vertical view of presser feet.
Tangent line parts when Figure 17 B is the sewing beginning and the side view of presser feet.
Tangent line parts when Figure 18 A is first stitch of formation and the vertical view of presser feet.
Tangent line parts when Figure 18 B is first stitch of formation and the side view of presser feet.
Figure 19 A decontrols the tangent line parts behind the upper thread end and the vertical view of presser feet.
Figure 19 B decontrols the tangent line parts behind the upper thread end and the side view of presser feet.
Figure 20 A is the side view of installing with part.
Figure 20 B is the front view of installing with part.
Figure 20 C is the vertical view of installing with part.
Figure 21 is the side view that the structure of pin side air nozzle is installed on installing with part.
Figure 22 A is the figure that is equivalent to Figure 17 A of remodeling example.
Figure 22 B is the figure that is equivalent to Figure 17 B of remodeling example.
The specific embodiment
Below, describe with regard to one embodiment of the present invention with reference to accompanying drawing.Present embodiment is that the present invention is used in a example on the button holing sewing machine, and described button holing sewing machine is used for forming tack buttonhole stitch 95 (with reference to Figure 16) on processing cloth W.
As depicted in figs. 1 and 2, button holing sewing machine M has sewing machine main body 1, supports the workbench 2 of this sewing machine main body 1, the guidance panel 3 that is arranged on workbench 2 upsides, the control cabinet 4 that is arranged on workbench 2 downsides and electrical motor of sewing machine 5.In addition, button holing sewing machine M also has the pedal 8 etc. of carried out operated by foot of the bottom of the shank 2a that is connected the air regulator 6 on the not shown forced air supply source, the electromagnetism directional control valve 7 that is connected with this air regulator 6 and is arranged on workbench 2 by steam hose.
Electromagnetism directional control valve 7 will be supplied to pin side air nozzle 70 described later or shuttle side air nozzle 75 from the forced air that air regulator 6 is sent here.This electromagnetism directional control valve 7 can be switched to any one state in pin side supply status, shuttle side supply status and the air supply halted state, wherein, described pin side supply status is meant that the forced air that will come from not shown forced air supply source is supplied to pin side air nozzle 70, described shuttle side supply status is meant described forced air is supplied to shuttle side air nozzle 75 that described air supply halted state is meant any one that described forced air is not supplied in pin side air nozzle 70 or the shuttle side air nozzle 75.
Sewing machine main body 1 has support portion 10, post portion 11 and horn portion 12.Control cabinet 4 contains control device 80 described later and has starting switch 86 (with reference to Figure 14), and when stepping on the position before the operator enters into pedal 8, described starting switch 86 can send the instruction that starts electrical motor of sewing machine 5.
As Fig. 5～shown in Figure 7, button holing sewing machine M has shank, and driving mechanism 14, needle tracking form mechanism 15, presser feet elevating mechanism 17, upper thread holding mechanism 18, bottom line maintaining body (omitting diagram), buttonhole and form mechanism's (omitting diagram) up and down.Shank up and down 14 pairs of driving mechanisms shank 20 that suture needle 21 is installed drives, and this shank 20 is moved up and down.Needle tracking forms mechanism 15 and is used for forming tack buttonhole stitch 95 on processing cloth W.Cloth feeding mechanism 16 and presser feet 26 collaborative works are transferred processing cloth W along fore-and-aft direction (so that the left side is as the place ahead among Fig. 2, the right side is as the rear).Presser feet elevating mechanism 17 drives presser feet 26, makes presser feet 26 do lifting action.When the sewing of tack buttonhole stitch 95 was finished, upper thread holding mechanism 18 utilized tangent line parts 30 to cut off upper thread and keep this upper thread end 97.The bottom line shut-off mechanism is used to cut off bottom line.Buttonhole forms mechanism forms linearity at the middle part of tack buttonhole stitch 95 buttonhole.
Before the sewing of tack buttonhole stitch 95, in the sewing process or after the sewing, buttonhole forms mechanism and forms buttonhole.Form mechanism 15 after forming tack buttonhole stitch 95 on the processing cloth W by needle tracking, by the tangent line parts 30 cut-out upper threads of upper thread holding mechanism 18, and pass through the bottom line shut-off mechanism and cut off bottom line, by presser feet elevating mechanism 17 lifting presser feets 26.
In horn portion 12, dispose main shaft 23 along fore-and-aft direction.The rearward end of this main shaft 23 is outstanding backward at the rear side of post portion 11, is fixed with handwheel 22 on this protuberance.Because of synchronous belt 22a being housed, so the driving force of electrical motor of sewing machine 5 is passed to main shaft 23 at handwheel 22 and driving wheel (the omitting diagram) spaced winding that is fixed on the driving shaft of electrical motor of sewing machine 5.The rotation that the main shaft 23 that driving mechanism 14 utilizations are driven by electrical motor of sewing machine 5 rotations about the shank is produced via crank mechanism (omit and illustrate) driving shank 20, makes it to move up and down.
As Fig. 3, shown in Figure 7, needle tracking forms mechanism 15 to have: be arranged on shank 20, suture needle 21, the thread take-up tension lever (omitting diagram) in the horn portion 12 and be arranged on shuttle mechanism 19 in the support portion 10 etc.Shuttle mechanism 19 has rotating shuttle 19a and shuttle sleeve 19b.Described shuttle sleeve 19b accommodates the bottom line shuttle (omitting diagram) that is contained on this rotating shuttle 19a.Main shaft 23 grades of rotation are driving shank 20 by driving through electrical motor of sewing machine 5 (with reference to Figure 14), carry out elevating movement.Therefore, rotating shuttle 19a catches the upper thread that supplies to the suture needle 21 of installing in shank 20 lower ends, then the upper thread of suture needle 21 and the bottom line of bottom line shuttle is interweaved, and forms tack buttonhole stitch 95.
Button holing sewing machine M has bindiny mechanism 50, is used to connect presser feet elevating mechanism 17, upper thread holding mechanism 18 and bottom line shut-off mechanism.In addition, button holing sewing machine M also has common motor 51, and it drives presser feet elevating mechanism 17, upper thread holding mechanism 18 and bottom line shut-off mechanism simultaneously via bindiny mechanism 50.In the back this bindiny mechanism 50 is elaborated.
Presser feet elevating mechanism 17 has with upper and lower to the connecting rod 28 that is length direction, and this connecting rod 28 is arranged on the leading section of horn portion 12.The bottom of connecting rod 28 is connected with the leading section of work feed arm 27, can relatively move along fore-and-aft direction between the two but can not relatively move along the vertical direction.Bindiny mechanism 50 is used to drive connecting rod 28, makes it elevating movement.
As Fig. 4, Fig. 8, Figure 10～shown in Figure 12, upper thread holding mechanism 18 has tangent line parts 30 and tangent line attaching parts 31.After forming tack buttonhole stitch 95 and buttonhole on the processing cloth W, tangent line parts 30 cut off upper thread and keep upper thread end 97 (with reference to Figure 17 A) (tangent line parts 30 residing positions are called off-position in the time of will cutting off upper thread) at the upside of needle plate 5a.Tangent line attaching parts 31 are connected with tangent line parts 30 at its leading section, and the end is bearing in rotating mode on the bolster 32 of vertical configuration (bolster 32 with vertical configuration is the axle center) thereafter.Make tangent line attaching parts 31 to move along cloth feeding direction (fore-and-aft direction).
In upper thread holding mechanism 18, tangent line parts 30 can carry out the position between these 4 positions, position and switch in off-position, sewing starting position (with reference to Figure 17 A), retreating position and sewing.Above-mentioned relatively off-position, the sewing starting position is positioned at the opposite side (rear) of cloth feeding direction (the place ahead) with when beginning sewing, and the cloth of cutting that forms mechanism for buttonhole is used near the position motion track of cutter 48.Retreating position is positioned at the left side of off-position, for from cutting the position that cloth is kept out of the way with the motion track of cutter 48.Sewing meta set is the position of readiness in the sewing process of tack keyhole suture needle mark 95 in the left side of sewing starting position and at the rear side of off-position.
As Figure 10, shown in Figure 12, sword switching mechanism 40 has wall portion 41 and the 1st operating portion 42, and wherein, described wall portion 41 is formed at movable sword 30b and goes up and erect upward, described the 1st operating portion 42 is used for promoting wall portion 41 from the rear, makes the closure of movable sword 30b and fixed blade 30a be opened.In addition, sword switching mechanism 40 also has the 2nd operating portion 43, rotates to the right by tangent line attaching parts 31, and the 2nd operating portion 43 pushes this right flank in the right flank mode in opposite directions with wall portion 41, makes movable sword 30b and fixed blade 30a closure.1st, the 2nd operating portion 42,43 is arranged on the work feed arm 27.By the engaging that relatively moves of the 1st, the 2nd operating portion 42,43, can realize the switching of fixed blade 30a and movable sword 30b.
The long slotted hole 31a of length before and after the rearward end of tangent line attaching parts 31 is formed with 1 couple along the vertical direction, each engaging has an engaging part 39 in each slotted hole 31a, and engaging part 39 can not break away from from slotted hole 31a but can slide therein.1 couple's that this forms along the vertical direction engaging part 39 is connected the bottom of bolster 32.On sewing machine frame, and this bolster 32 can rotate relative to sewing machine frame with the upper support of bolster 32.Therefore, the rearward end of tangent line attaching parts 31 is bearing on the vertical axle in rotating mode, and can moves along fore-and-aft direction.
As Fig. 8, Fig. 9, shown in Figure 13, tangent line attaching parts 31 are except that 1 couple of slotted hole 31a, also be formed with slotted hole 31b, described slotted hole 31b is the long rectangular opening of fore-and-aft direction length, and be positioned at than tangent line attaching parts 31 along forward slightly position, the middle part of fore-and-aft direction.Be formed with circular hole 31c between slotted hole 31a, the 31b.The approximate mid-section along fore-and-aft direction in tangent line attaching parts 31 has movable member 33.
The major part of this movable member 33 is configured in the left side of tangent line attaching parts 31, the axial region that will be fixed in two bolts 34 on the tangent line attaching parts 31 slidably is fastened in the slotted hole 33a, described slotted hole 33a be formed on the movable member 33 and the length of fore-and-aft direction longer.Movable member 33 have from its front end to the front wall portion 33b of right-hand bending and from its rear end to the rear wall parts 33c of left bending.
The upper end along the front side at the middle part of fore-and-aft direction in tangent line attaching parts 31 is fixed with the 2nd spring installing component 37 to right-hand extension.The right front end and the sewing machine frame that is positioned at tangent line attaching parts 31 left sides that connect the 2nd spring installing component 37 by traction disc spring 38.Therefore, tangent line attaching parts 31 are that center left load to it with bolster 32 by traction disc spring 38.Be formed with whole to the outstanding tabular protuberance 31d of left in the upper end, rear of tangent line attaching parts 31.Protuberance 31d has local to the outstanding stage portion 31e of left in its front portion.
The 2nd holding section 46 that on the 2nd connecting rod 66 of the 2nd drive system 58 of bindiny mechanism 50, is separately installed with the 1st tabular holding section 45 and constitutes by roller, described the 1st holding section 45 can engage with rear wall parts 33c, and described the 2nd holding section 46 can engage with protuberance 31d.
With regard to rear wall parts 33c and the 1st holding section 45, when the two is in fastening state, tangent line parts 30 are remained on the sewing starting position, when the two is in non-fastening state, allow tangent line parts 30 to switch to position in retreating position or the sewing.That is, tangent line parts 30 are loaded the position in retreating position or sewing it by traction disc spring 38, and when protuberance 31d and the 2nd holding section 46 were in fastening state, tangent line parts 30 were maintained at position in retreating position, off-position or the sewing.
Next, bindiny mechanism 50 is described.As Fig. 5～Fig. 7, shown in Figure 13, bindiny mechanism 50 has lifter plate 52, vertical bar 53, L shaped connecting rod 54,55, and interlock plate 56, and the 1st, the 2nd drive system 57,58 etc.
As Fig. 5, shown in Figure 13, common motor 51 is configured in the substantial middle portion along the vertical direction of post portion 11, and makes its output shaft towards the right side.Dispose 1 couple of guide post 52a that extends along the vertical direction above common motor 51, described guide post 52a is used for the lifter plate 52 that leads along the vertical direction.Be fixed on gear 51a and formed gear 52b engagement on the output shaft of common motor 51 in lifter plate 52 bottoms, the upper end of the front portion of lifter plate 52 is formed with the branched portion 52c that is divided into two strands, and this branched portion 52c engages with the engagement pin 53a that is fixed on vertical bar 53 tops.Therefore, common motor 51 together drives vertical bar 53 with lifter plate 52, makes it to carry out lifting.
By bolster 54a, 55a respectively with 1 pair of L shaped connecting rod 54,55 being bearing in relative to the mode that sewing machine frame rotates on the sewing machine frame, described bolster 54a, 55a are configured in the front and rear of horn portion 12 respectively and extend along left and right directions.Interlock plate 56 is made of the long plate member of fore-and-aft direction length and is configured between 1 pair of L shaped connecting rod 54,55.The rearward end of interlock plate 56 is connected the upper end of L shaped connecting rod 54, the leading section of interlock plate 56 is connected the upper end of L shaped connecting rod 55.
With the rearward end of L shaped connecting rod 54 can be connected the upper end of vertical bar 53 relative to the mode that vertical bar 53 rotates.The leading section of L shaped connecting rod 55 is connected the upper end of the connecting rod 28 of presser feet elevating mechanism 17.When the vertical bar 53 of lifting, L shaped connecting rod 54,55 rotates, and the lifting and move back and forth along fore-and-aft direction a little of interlock plate 56.When interlock plate 56 is forwards mobile, by connecting rod 28 presser feet 26 is descended, when interlock plate 56 is rearward mobile, presser feet 26 is risen by connecting rod 28.
The 1st drive system 57 is transmitted the driving force of interlock plate 56 and is given tangent line attaching parts 31, thereby drives tangent line attaching parts 31 along fore-and-aft direction.The 1st drive system 57 has link component 60 and the 1st connecting rod 61, and wherein, described link component 60 rotates around the axle that extends along left and right directions, and is bearing on the sewing machine frame by this axle, and the upper end of described the 1st connecting rod 61 is fixedly connected on the link component 60.The engagement pin 60a of link component 60 top ends is fastened in forniciform the 1st pilot hole 56a, and described the 1st pilot hole 56a is formed on the interlock plate 56.The engagement pin 61a of the 1st connecting rod 61 bottoms engages with the circular hole 31c of tangent line attaching parts 31.
The 2nd drive system 58 is transmitted the driving force of interlock plate 56 and is given the 1st, the 2nd holding section 45,46, thereby roughly drives the 1st, the 2nd holding section 45,46 along fore-and-aft direction.The 2nd drive system 58 has link component 65 and the 2nd connecting rod 66, and wherein, described link component 65 rotates around the axle that extends along left and right directions, and is bearing on the sewing machine frame by this axle, and the upper end of described the 2nd connecting rod 66 is fixedly connected on the link component 65.The engagement pin 65a of link component 65 top ends is fastened in forniciform the 2nd pilot hole 56b, and described the 2nd pilot hole 56b is formed on the interlock plate 56.
Next, major part of the present invention is described.As Fig. 1, Fig. 3, shown in Figure 4, dispose pin side air nozzle 70 (it is equivalent to the 1st air blow-off mechanism) in the place ahead of horn portion 12.This pin side air nozzle 70 roughly is the curved shape of crank-like in its front view, and the installation by L word shape is fixed on its upper end with part 71 on the bight, bottom right of leading section of horn portion 12.The lower end part of pin side air nozzle 70 is in the positive front side of suture needle 21.Shown in Fig. 3, Figure 17 B, the bottom of this pin side air nozzle 70 is towards oblique rear.
With regard to part 71 is used in above-mentioned installation, shown in Figure 20 A, 20B, Figure 20 C, on its horizontal part 71a, be formed with the slotted hole 71b that is used for fixing pin side air nozzle 70, on the 71c of its vertical portion, be formed with and be used for slotted hole 71d in the horn portion 12 (sewing machine main body) is fixed in this installation with part 71.As shown in figure 21, be provided with the bigger part 70a of diameter in the upper end of pin side air nozzle 70, the downside of this diameter major part 70a is formed with threaded portion 70b.Make this threaded portion 70b pass (from top to bottom) and install with the slotted hole 71b of part 71 and utilize nut 70c to cooperate with it and fastening, install on the usefulness part 71 thereby utilize diameter major part 70a and nut 70c that pin side air nozzle 70 is fixed to.Unclamp nut 70c, threaded portion 70b (that is pin side air nozzle 70) is moved in the major diameter scope that the slotted hole 71b that uses part 71 is installed.
To install when being fixed in the horn portion 12 with part 71, as shown in Figure 3 and Figure 4, bolt 70d passed to install with the slotted hole 71d of part 71 cooperate with screwed hole (not shown) on being formed at horn portion 12, be fixed in the horn portion 12 thereby will install with part 71, at this moment, by unclamping bolt 70d, can make to install and move along the vertical direction with part 71 (that is pin side air nozzle 70).Therefore, can adjust the setting angle and the installation site with respect to horn portion 12 of pin side air nozzle 70.Constitute installing mechanism by installing with part 71, nut 70c, bolt 70d etc.
On the diameter major part 70a of pin side air nozzle 70 upper ends, be provided with the 1st regulating cock 72 that to regulate the forced air supply.Be connected by the pin side ports of the 1st steam hose 73 with connecting portion 70e and electromagnetism directional control valve 7, described connecting portion 70e is formed at the upside of the diameter major part 70a of portion of pin side air nozzle 70.By the 1st steam hose 73 and the 1st regulating cock 72, the forced air that will come from the pin side ports supply of above-mentioned electromagnetism directional control valve 7 spray to through the top ends (bottom) of pin side air nozzle 70 suture needle 21 needle downing position near.In other words, forced air near the place ahead of suture needle 21 from the tangent line parts 30 powerful ejections of oblique upper to upper thread holding mechanism 18.
When the sewing of tack buttonhole stitch 95 begins, just the top ends from pin side air nozzle 70 sprays forced air, then after the sewing of tack buttonhole stitch 95 begins, towards the rear, to form direction ND consistent with needle tracking from upper thread end 97 (always) that processing cloth W stretches out.Thereby upper thread end 97 can be sewed up in the zigzag needle tracking 95a of tack buttonhole stitch 95.
As shown in Figure 3, in the left side that is arranged at the shuttle mechanism 19 in the support portion 10, be provided with shuttle side air nozzle 75 (it is equivalent to the 2nd ejection mechanism) facing to shuttle mechanism 19.Rearward end at shuttle side air nozzle 75 is connected with the 2nd regulating cock 76 that can regulate the forced air supply, and the shuttle side ports by 77 pairs of above-mentioned electromagnetism directional control valves 7 of the 2nd steam hose is connected with the 2nd regulating cock 76.
By the 2nd steam hose 77 and the 2nd regulating cock 76, the forced air that will come from the shuttle side ports supply of electromagnetism directional control valve 7 sprays to shuttle mechanism 19 with sudden force through the top ends (leading section) of shuttle side air nozzle 75.Therefore, during not sewing, in other words, be in propradation at presser feet 26, that is during not influencing that needle tracking forms, can be by forced air in the sewing process, cooling off because of himself rotating heated rotating shuttle 19a at a high speed.
Next, the calcspar based on Figure 14 describes the control system that comprises control device 80 among the button holing sewing machine M.
The display controller 92 that is connected with the drive circuit 88 that is used for electrical motor of sewing machine 5, the drive circuit 89 that is used for work feed motor 25, the driving loop 90 that is used for common motor 51, the drive circuit 91 that is used for electromagnetism directional control valve 7 on the output interface 85 and is used for showing signal to display 3a output.Store the various drive controlling programs that are used for above-mentioned each motor 5,25,51 of drive controlling in the ROM82.
Next, based on the flow chart of Figure 15, the ejection control of the forced air that the control device 80 by button holing sewing machine M carries out is described.
To button holing sewing machine M power supply, begin to carry out the ejection control of forced air, at first, make electromagnetism directional control valve 7 switch to air supply halted state (S11).Therefore, any one in pin side air nozzle 70 and the shuttle side air nozzle 75 do not spray forced air.
Next, when the sewing beginning, step on position (front portion of pedal is operated) if step on before pedal 8 is operated it, then starting switch 86 is switched on.When CPU81 detected starting switch 86 and is in connection (S12, S13:Yes) state, it sent the instruction that drives common motor 51.Thereby, presser feet 26 is descended, it is switched to depressing position, so CPU81 makes electromagnetism directional control valve 7 switch to pin side supply status (S14).Therefore, forced air through the top ends of pin side air nozzle 70 near the oblique upper powerful ejection needle downing position of suture needle 21.
Next, before the sewing of tack buttonhole stitch 95 is finished, control device 80 is in holding state (S15:NO) always, and after the sewing of tack buttonhole stitch 95 is finished (S15:Yes), CPU81 makes electromagnetism directional control valve 7 switch to shuttle side supply status (S16).Thereby, forced air is sprayed to shuttle mechanism 19 through the top ends of shuttle side air nozzle 75.
When CPU81 detects bobbin changer switch 87 and becomes making operation (S17:Yes), CPU81 just switches to electromagnetism directional control valve 7 air supply halted state (S18), and gets back to S12 and handle.Therefore, even forced air is in the state that sprays through shuttle side air nozzle 75 before this change action, this change action also can force to stop the ejection of forced air to shuttle mechanism 19.The operator can take out shuttle sleeve 19b from rotating shuttle 19a, change the bottom line shuttle, and then the bottom line shuttle is installed onto on the rotating shuttle 19a with shuttle sleeve 19b.
At this moment, can drive common motor 51, presser feet 26 is switched to depressing position.
In addition, when CPU81 detects the opening operation of bobbin changer switch 87 (S19:Yes), CPU81 can switch to electromagnetism directional control valve 7 shuttle side supply status (S20).When CPU81 detects any switching manipulation except that the aforesaid operations of starting switch 86 and bobbin changer switch 87 (S19:No), then carry out and the corresponding processing of this console switch (S21).
Next, the working method to button holing sewing machine M describes.
As the early-stage preparations that form before the tack buttonhole stitch 95, the operator needs thickness or the kind according to the upper thread that uses, and regulates from the flow of the forced air of pin side air nozzle 70 ejections by the 1st regulating cock 72.And,, regulate from the flow of the forced air of shuttle side air nozzle 75 ejections by the 2nd regulating cock 76 according to the thickness or the kind of the bottom line that uses.
During the sewing beginning, originally, interlock plate 56 roughly is positioned at the rear critical localisation, by presser feet elevating mechanism 17 presser feet 26 is remained on raised position, and the operator will process cloth W and be positioned over sewing position.
After will processing cloth W and being positioned over sewing position, the operator steps on the operation of pedal 8, and this moment, general-purpose machine 51 was driven, and makes the interlock plate 56 of bindiny mechanism 50 forwards move.Shown in Figure 17 A, Figure 17 B, from the rear critical localisation process that forwards critical localisation moves roughly, presser feet 26 drops to depressing position and thoroughly will process cloth W and be pressed on the work feed parts 24 at interlock plate 56.At this moment, tangent line parts 30 switch to the sewing starting position.After switching to such state, begin to sew.
Thereafter, electromagnetism directional control valve 7 switches to pin side supply status, and forced air is through pin side air nozzle 70 sprays to the needle downing position of suture needle 21 strong from oblique upper near.Shown in Figure 17 A, upper thread end 97 is being blown by the forced air from 70 ejections of pin side air nozzle, then be maintained on the tangent line parts 30, and then under such state, sew.
When forming each zigzag needle tracking 95a on a pin one pin ground, all can upper thread end 97 be sewed up the zigzag needle tracking 95a of tack buttonhole stitch 95 along with moving forward of presser feet 26.
Proceed sewing, for example, after cloth feed amount reached about 5mm, rear wall parts 33c and the 1st holding section 45 were separately.Therefore, by the loading of traction disc spring 38, tangent line attaching parts 31 are moved to left.In addition, protuberance 31d and the engaging of the 2nd holding section 46, tangent line parts 30 are kept out of the way and are moved to position in the sewing.As previously mentioned, by sword switching mechanism 40, make tangent line parts 30 open its 1 couple and be in sword 30a, the 30b of closure state and unclamp upper thread end 97.
At this moment, as previously mentioned, by through the top ends of pin side air nozzle 70 to the forced air that oblique below sprays strong, make above-mentioned upper thread end 97 form direction ND towards needle tracking, described needle tracking forms direction ND, and the direction during by 18 maintenances of upper thread maintaining body is identical with it.And, upper thread end 97 is pressed in the upper surface of processing cloth W.Thereby, when forming tack buttonhole stitch 95, reliably whole upper thread end 97 is sewed up needle tracking 95a in a zigzag.
Form tack buttonhole stitch 95 and interlock plate 56 rearward moves,, the 1st, the 2nd holding section 45,46 is forwards moved then by the 2nd drive system 58.By the 1st drive system 57, tangent line attaching parts 31 are forwards moved, make tangent line parts 30 from sewing, switch to retreating position in the position.
Thereafter, move interlock plate 56 and further move backward, tangent line attaching parts 31 are slack on fore-and-aft direction, under this state, by the 2nd drive system 58, the 1st, the 2nd holding section 45,46 forwards moved.Thereby, make stage portion 31e and 46 engagings of the 2nd holding section to make tangent line parts 30 switch to off-position.At this moment, make tangent line parts 30 closed its 1 couples be in sword 30a, the 30b of open mode, cut off upper thread and keep upper thread end 97 by sword switching mechanism 40.
At this moment, by bindiny mechanism 50, make the bottom line shut-off mechanism that interlock take place and cut off bottom line.In addition, also can make 17 interlocks of presser feet elevating mechanism that presser feet 26 is risen, thereby can take out processing cloth W.If the sewing of tack buttonhole stitch 95 is finished, presser feet 26 rises, and 7 of electromagnetism directional control valves switch to shuttle side supply status.Therefore, pin side air nozzle 70 stops to spray air, and sprays forced airs by shuttle side air nozzle 75 to shuttle mechanism 19.Therefore, can under the state that can not influence needle tracking formation, cool off rotating shuttle 19a.
In addition, because in the sewing process, suture needle 21 is passed processing cloth W and is moved up and down at a high speed, so the friction between suture needle 21 that can cause because of moving up and down of suture needle 21 and processing cloth W produces frictional heat in suture needle 21, even but in this case, also can cool off suture needle 21 by the forced air of pin side air nozzle 70 ejections.Therefore, the upper thread that passes the pin hole of suture needle 21 can heating, thereby can prevent from advance to cause that because of the upper thread temperature rises changing distortion appears or dredge quality such as soft in upper thread, and can prevent the generation of bouncing pilotage reliably.
Be provided with control device 80 among the button holing sewing machine M, when beginning, its sewing from tack buttonhole stitch 95 just controls, make forced air from 70 ejections of pin side air nozzle, wherein, described forced air makes and forms direction ND from the upper thread end 97 that the processing cloth W of tack buttonhole stitch 95 stretches out towards needle tracking.Therefore, the automation of the forced air ejection control in the time of can being implemented in the sewing beginning, and can reliably the upper thread end 97 that is oriented towards needle tracking formation direction ND be sewed up in the tack buttonhole stitch 95.
Pin side air nozzle 70 is set to following angle, makes near the needle downing position of suture needle 21 from oblique upper ejection forced air.Therefore, not only make from the upper thread end 97 that processing cloth W stretches out and form direction ND towards needle tracking, and, even at processing cloth W and during dipping and heaving by the drive up and down of suture needle 21, also can be with the surface of upper thread end 97 blow pressures at processing cloth W.
Also be provided with shuttle side air nozzle 75 among the button holing sewing machine M, its shuttle mechanism 19 ejection forced airs in the support portion 10 that is arranged at button holing sewing machine M.Therefore, even the rotating shuttle 19a of shuttle mechanism 19 rotates at a high speed under the situation that occurs generating heat in because of the sewing process, also can in the time period during the non-sewing that does not influence needle tracking formation, cool off rotating shuttle 19a effectively.
In addition, be provided with bobbin changer switch 87 in order to change the bottom line shuttle, the instruction that its bottom line shuttle that sends shuttle mechanism 19 is changed, when this bobbin changer switch 87 of making operation, control device 80 is ended from shuttle side air nozzle 75 ejection forced airs.Therefore, can easily change the bottom line shuttle.
Next, the remodeling embodiment to part remodeling the foregoing description describes.
(1) it is flexible and can keep the structure (for example with formations such as coiled pipes) of the shape after the bending that pin side air nozzle 70 also can have top ends, thus the emission direction of fine-tuning forced air from 70 ejections of pin side air nozzle.
(2) also can begin from sewing after, electromagnetism directional control valve 7 be switched to the air supply halted state, stop from the forced air of pin side air nozzle 70 ejections through the stipulated time (for example 0.5 second).
(3) shown in Figure 22 A, Figure 22 B, pin side air nozzle 70A also adopts the structure that constitutes with presser feet 26A one.That is, on the front end frame 26a of portion of presser feet 26A, connection is provided with along the straight shape air flue 26b of fore-and-aft direction and downward-sloping skewed air flue 26c.And, the bottom of pin side air nozzle 70A is connected on this front end frame 26a of portion.
Under the situation that adopts this structure, the forced air that is supplied to pin side air nozzle 70A sprays from oblique upper near the needle downing position of suture needle 21 through these straight shape air flue 26b and downward-sloping skewed air flue 26c.Adopt this structure also can obtain effect same as the previously described embodiments.But because of presser feet 20A need carry out the motion of above-below direction, so the most deformable flexible pipe such as handy vinyl constitutes pin side air nozzle 70A.
Claims (12)
1. button holing sewing machine, it has: shank is driving mechanism up and down, and its driving is used to install the shank of suture needle, makes it to move up and down; The presser feet elevating mechanism, it moves up and down presser feet; The tangent line parts, it cuts off upper thread after the sewing of buttonhole stitch; Upper thread holding mechanism, its upside at needle plate keeps cutting off the upper thread end that upper thread forms by the tangent line parts, it is characterized in that,
This button holing sewing machine also possesses the 1st air blow-off mechanism, and it is arranged on an opposite side with above-mentioned upper thread holding mechanism for described suture needle, is used for to described upper thread holding mechanism ejection forced air.
2. the button holing sewing machine of putting down in writing as claim 1 is characterized in that,
Described tangent line parts are arranged on the described upper thread holding mechanism.
3. the button holing sewing machine of putting down in writing as claim 1 is characterized in that,
Also have controlling organization, when its sewing from described buttonhole stitch began, control made to form direction from the described upper thread end that the processing cloth of described buttonhole stitch stretches out along needle tracking from described the 1st air blow-off mechanism ejection forced air.
4. the button holing sewing machine of putting down in writing as claim 2 is characterized in that,
Also have controlling organization, when its sewing from described buttonhole stitch began, control made to form direction from the described upper thread end that the processing cloth of described buttonhole stitch stretches out along needle tracking from described the 1st air blow-off mechanism ejection forced air.
5. the button holing sewing machine of putting down in writing as claim 1 is characterized in that,
Described the 1st air blow-off mechanism is arranged to as lower angle, and this angle makes described forced air be ejected near the needle downing position of described suture needle from oblique upper.
6. the button holing sewing machine of putting down in writing as claim 2 is characterized in that,
Described the 1st air blow-off mechanism is arranged to as lower angle, and this angle makes described forced air be ejected near the needle downing position of described suture needle from oblique upper.
7. the button holing sewing machine of putting down in writing as claim 3 is characterized in that,
Described the 1st air blow-off mechanism is arranged to as lower angle, and this angle makes described forced air be ejected near the needle downing position of described suture needle from oblique upper.
8. as claim 3,4, any button holing sewing machine of being put down in writing of 7, it is characterized in that,
Also has the 2nd air blow-off mechanism, its shuttle mechanism ejection forced air in the support portion that is arranged at described button holing sewing machine.
9. the button holing sewing machine of putting down in writing as claim 8 is characterized in that,
Described controlling organization is controlled, and makes when described presser feet is in depressed state, from described the 1st air blow-off mechanism ejection forced air, when described presser feet is in the lifting state, from described the 2nd air blow-off mechanism ejection forced air.
10. the button holing sewing machine of putting down in writing as claim 8 is characterized in that,
Be provided with the bobbin changer switch, the replacing of the bottom line shuttle of its indication on described shuttle mechanism,
The structure of described controlling organization is, after it receives switching signal from described bobbin changer switch, ends from described the 2nd air blow-off mechanism ejection forced air.
11. the button holing sewing machine as claim 9 is put down in writing is characterized in that,
Be provided with the bobbin changer switch, the replacing of the bottom line shuttle of its indication on described shuttle mechanism,
The structure of described controlling organization is, after it receives switching signal from described bobbin changer switch, ends from described the 2nd air blow-off mechanism ejection forced air.
12. the button holing sewing machine as claim 1 is put down in writing is characterized in that,
Described the 1st air blow-off mechanism is installed on the sewing machine main body by installing mechanism,
The installation that described installing mechanism has a L word shape with part, be formed at this installation and partly go up with the sheet of a side of part and be used for fixing the slotted hole of described the 1st air blow-off mechanism and be formed at described installation and partly go up with the sheet of the opposite side of part and be used for this installation is fixed on the slotted hole of described sewing machine main body with part, can adjust the setting angle with respect to described sewing machine main body of described the 1st air blow-off mechanism by the formed structure of above-mentioned each parts that this described installing mechanism had.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP115571/2006 | 2006-04-19 | ||
| JP2006115571A JP2007282978A (en) | 2006-04-19 | 2006-04-19 | Buttonholing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101058923A true CN101058923A (en) | 2007-10-24 |
| CN101058923B CN101058923B (en) | 2011-10-05 |
Family
ID=38755275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100937902A Expired - Fee Related CN101058923B (en) | 2006-04-19 | 2007-04-18 | Keyhole sawing mechine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007282978A (en) |
| CN (1) | CN101058923B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762758A (en) * | 2015-04-26 | 2015-07-08 | 周盈裕 | Novel automatic trimming concealed sewing machine |
| CN104805605A (en) * | 2015-05-12 | 2015-07-29 | 浙江杜马缝纫机股份有限公司 | Thread trimming mechanism for normal sewing machine |
| CN110863306A (en) * | 2018-08-27 | 2020-03-06 | 重庆大学 | Weaving method of functional electronic fabric |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5965371B2 (en) * | 2013-09-10 | 2016-08-03 | 株式会社松屋アールアンドディ | Lower thread remaining amount detection device for sewing machine |
| JP6891529B2 (en) * | 2017-02-17 | 2021-06-18 | ブラザー工業株式会社 | sewing machine |
| JP2019118731A (en) * | 2018-01-11 | 2019-07-22 | ブラザー工業株式会社 | sewing machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1219760A (en) * | 1967-12-30 | 1971-01-20 | Wood Bastow & Company Ltd | Improvements in or relating to sewing machines |
| US4228748A (en) * | 1979-10-29 | 1980-10-21 | Dufault Armand A | Thread control for buttonhole sewing machine |
| US5524561A (en) * | 1994-09-23 | 1996-06-11 | Clinton Industries, Inc. | Buttonhole sewing machine |
| JP2002233683A (en) * | 2001-02-09 | 2002-08-20 | Juki Corp | Cooling device for shuttle of sewing machine |
| JP3757336B2 (en) * | 2004-01-28 | 2006-03-22 | ヤマトミシン製造株式会社 | Sewing machine with empty ring stitching device |
-
2006
- 2006-04-19 JP JP2006115571A patent/JP2007282978A/en active Pending
-
2007
- 2007-04-18 CN CN2007100937902A patent/CN101058923B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762758A (en) * | 2015-04-26 | 2015-07-08 | 周盈裕 | Novel automatic trimming concealed sewing machine |
| CN104805605A (en) * | 2015-05-12 | 2015-07-29 | 浙江杜马缝纫机股份有限公司 | Thread trimming mechanism for normal sewing machine |
| CN104805605B (en) * | 2015-05-12 | 2018-07-10 | 浙江杜马缝纫机股份有限公司 | The thread cutting mechanism of flat seam machine |
| CN110863306A (en) * | 2018-08-27 | 2020-03-06 | 重庆大学 | Weaving method of functional electronic fabric |
| CN110863306B (en) * | 2018-08-27 | 2021-08-03 | 重庆大学 | Weaving method of functional electronic fabric |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007282978A (en) | 2007-11-01 |
| CN101058923B (en) | 2011-10-05 |
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