CN1210164A - Method and device for preventing seam from being loosen of double stitches of sewing machine - Google Patents
Method and device for preventing seam from being loosen of double stitches of sewing machine Download PDFInfo
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- CN1210164A CN1210164A CN98115550A CN98115550A CN1210164A CN 1210164 A CN1210164 A CN 1210164A CN 98115550 A CN98115550 A CN 98115550A CN 98115550 A CN98115550 A CN 98115550A CN 1210164 A CN1210164 A CN 1210164A
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Abstract
A method and apparatus for preventing a seam from raveling in a double chain stitch sewing machine according to the present invention are applied to sewing of cloth by a double chain stitch sewing machine, which the character is: when a looper 3 which rocks back and forth between an advanced position and a retreated position across needles 4, 5 is rocked to the advanced position, a hook knife 11 is brought into the triangle P of threads which is formed by a looper-thread loop 8L leading from cloth W to the looper and by needle thread loops 6L, 7L engaged with the looper 3; with the hook knife 1 advanced, a sewing machine is driven by an amount equal to one needle motion, and when the looper 3 is again rocked to the advanced position, the looper thread loop 8L is engaged and held by the end hook 10 of the hook knife 11 and then the looper thread loop 8L held against the end hook 10 is cut while the needle thread loops 6L1, 7L1 engaged with the looper 3 are cut.
Description
Be used to prevent method that prevents stitch loosening and device thereof that the sewing terminal sewing thread at stitch unclamps when the present invention relates to use the doublet interlock seam sewing machine tailoring cloth of the dual chain type stitch that forms by needlework and shuttle thread.
In the prior art, line and the eedle that moves up and down have been put on and when the doublet interlock seam sewing machine of holding the lopping device of advance and retreat swing between the front and back position of this eedle under the arm forms the dual chain type stitch of for example using shown in the JISL120 needle tracking form 406 with having at least one, when from the pulling of the sewing terminal of this stitch during as the looper thread that rolls off the production line, stitch can unclamp in succession.As the method that prevents that this sewing thread from unclamping, existing technical scheme has: the method that the stitch spacing of several pins before sewing is closed to an end attenuates; Also open such that flat 1-31745 communique and the flat 5-208082 communique of Te Kai etc. are disclosed just like the spy, the equalization of strain that changes the sewing thread of sewing end of a period part makes and unclamps the method that is difficult to take place; Perhaps opening flat 6-233877 communique as the spy discloses, keep looper thread looper thread hook sliding freely in the setting of the rear of lopping device, in a single day before being about to end, sewing stops Sewing machines, this looper thread hook keeps looper thread, continue to make 1 pin, in the time of with eedle line and looper thread cut-out, by under the state that is keeping looper thread on the one-tenth astragal thread hook, cloth being taken off from Sewing machines, the interlacing state of transcriber needlework and looper thread, thus can not produce the phenomenon of unclamping.
Yet in above-mentioned existing anti-loose method, in preceding two kinds of methods, aspect preventing to unclamp, lack reliability, and in a kind of method in back, the problem that exists is: the end of a thread of cut-out is long to be remained on the cloth longways, as sewings, degraded appearance is in order to improve outward appearance, must to cut off long residual the end of a thread once more by hand.
In view of above-mentioned truth, the purpose of this invention is to provide a kind of can preventing reliably and can obtain simultaneously the locking extraction of root of stitch and the device thereof of the doublet interlock seam sewing machine of the sewings that the end of a thread is short, outward appearance is good from the unclamping of the sewing terminal of stitch.
To achieve the above object, the technical characterictic of stitch anti-loose method first scheme of doublet interlock seam sewing machine of the present invention is: pass needlework and at least one eedle that moves up and down and clip the advance and retreat swing and be installed with the process of tailoring cloth of double line interlock seam sewing machine of lopping device that forms the looper thread of double chain type stitch with above-mentioned needlework and be made of three steps of this machine eedle between progressive position and going-back position having.In first step, swung under the state of progressive position at above-mentioned lopping device, combining mechanism enters by connecting from cloth among the triangle of the line that the looper-thread loop of lopping device and the needle thread loop that combines with above-mentioned lopping device form.In second step, under above-mentioned combining mechanism enters state in the triangle of line, drive Sewing machines and walk a pin, once more above-mentioned lopping device is swung to progressive position, above-mentioned combining mechanism combines with looper thread and keeps looper-thread loop.In the 3rd step: cut off the looper-thread loop that remains on the combining mechanism, cut off the needle thread loop that is attached on the lopping device simultaneously.
In addition, the feature of second technical scheme of the stitch anti-loose method of doublet interlock seam sewing machine of the present invention is: pass needlework and at least one eedle that moves up and down and clip the advance and retreat swing and be installed with the process of tailoring cloth of double line interlock seam sewing machine of lopping device that forms the looper thread of double chain type stitch with above-mentioned needlework and be made of three steps of this machine eedle between progressive position and going-back position having.In first step, swung under the state of progressive position at above-mentioned lopping device, combining mechanism enters by connecting from cloth among the triangle of the line that the looper-thread loop of lopping device and the needle thread loop that combines with above-mentioned lopping device form.In second step, under above-mentioned combining mechanism enters state in the triangle of line, drive Sewing machines and walk half pin.Swing to going-back position at above-mentioned lopping device, above-mentioned combining mechanism is in conjunction with looper thread and keep after the looper-thread loop, cuts off the looper-thread loop that remains on this combining mechanism.In third step, drive Sewing machines and walk half pin from the going-back position of above-mentioned lopping device.This lopping device is swung to progressive position, cut off the needle thread loop that is attached on the lopping device.
The stitch locking device of doublet interlock seam sewing machine of the present invention, it is characterized in that, pass needlework and at least one eedle that moves up and down and clip the advance and retreat swing and be installed with the double line interlock seam sewing machine of lopping device that forms the looper thread of double chain type stitch with above-mentioned needlework of this machine eedle between progressive position and going-back position having, it possesses has: lopping device combining mechanism, looper thread cutter, eedle toe-in close mechanism, eedle line cutter.Above-mentioned lopping device combining mechanism enters in above-mentioned lopping device swings to the state of progressive position by connecting from cloth among the triangle of the line that the looper-thread loop of lopping device and the needle thread loop that combines with above-mentioned lopping device form and keeping looper-thread loop.Above-mentioned looper thread cutter cuts off the looper-thread loop that remains on the above-mentioned looper thread combining mechanism.Above-mentioned eedle toe-in closes mechanism and catches the needle thread loop that is incorporated on the above-mentioned lopping device.Above-mentioned eedle line cutter cuts off to catch at above-mentioned eedle toe-in and closes eedle line on the means.
According to technical scheme in the invention described above, by eedle and the co-operating of lopping device, form the dual chain type stitch of regulation with eedle line and looper thread, be in top dead-centre at sewing terminal point, eedle near this stitch, the lopping device is in the state that swings to progressive position, the looper thread combining mechanism enters in the triangle of the line that is formed by looper-thread loop and needle thread loop, above-mentioned looper-thread loop is linked on the lopping device from cloth, and above-mentioned needle thread loop is combined on the lopping device.Under this state, walk a pin or half pin by driving Sewing machines, looper-thread loop is combined to remain on after the combining mechanism, and this cut while of maintained looper-thread loop, the needle thread loop that is incorporated on the lopping device also is cut off.Combining mechanism has just entered in the triangle of the line that is formed by looper-thread loop and needle thread loop like this, above-mentioned looper-thread loop is linked the lopping device from cloth, above-mentioned needle thread loop is attached on the lopping device, and, owing to also cut off needle thread loop when cutting off in conjunction with the looper-thread loop that remains on this, even change along with the change of stitch spacing so link the inclination angle of the looper-thread loop on the lopping device from cloth, by combining mechanism being entered in the triangle of above-mentioned line, energy zero defect ground can also prescind the length of the end of a thread of linking cloth reliably in conjunction with keeping looper-thread loop.
In the anti-back-off assembly of the stitch of above-mentioned doublet interlock seam sewing machine of the present invention, when by hook-shaped cutting knife with when bearing cutting knife and constituting above-mentioned lopping device cutter, because the double lopping device toe-in of doing of the hook-shaped cutting knife of looper thread cutter closes mechanism and owing to can adopt the advance and retreat driving mechanism of simple swinging driving mechanism as looper thread cutter and looper thread combining mechanism.So device integral body is made structure not only simply but also compact easily.The double lopping device toe-in of doing of above-mentioned hook-shaped cutting knife closes mechanism and has swinging advance and retreat driving mechanism.Above-mentioned bear cutting knife when hook-shaped cutting knife when keeping above-mentioned looper-thread loop and retreating into certain position, cut off this looper-thread loop.
Fig. 1 is applicable to the whole oblique view of doublet interlock seam sewing machine of the present invention;
Fig. 2 is the vertical view of the looper thread cutter of wanting portion as the anti-back-off assembly of doublet interlock seam sewing machine stitch of the present invention when being in non-actuator state;
Fig. 3 is the vertical view of the looper thread cutter of Fig. 2 when being in operating state;
Fig. 4 is the vertical view of the looper thread cutter of Fig. 2 when being in operating state;
Fig. 5 is that the driving of looper thread cutter of key diagram 2 is with the detailed exploded perspective view of swinging advance and retreat driving mechanism;
Fig. 6 is the oblique view of assembled state of detailed structure of the swinging advance and retreat driving mechanism of key diagram 2;
The oblique view of the 1st action when Fig. 7 is expression by the sewing termination of the dual chain type stitch of the embodiment of stitch anti-loose method of the present invention;
The oblique view of second action when Fig. 8 is the sewing termination of presentation graphs 7 described dual chain type stitch;
The oblique view of the 3rd action when Fig. 9 is the sewing termination of presentation graphs 7 described dual chain type stitch;
The oblique view of the 4th action when Figure 10 is the sewing termination of presentation graphs 7 described dual chain type stitch;
The oblique view of the 5th action when Figure 11 is the sewing termination of presentation graphs 7 described dual chain type stitch;
The oblique view of the 6th action when Figure 12 is the sewing termination of expression dual chain-type stitch stitch shown in Figure 7;
The oblique view of the 3rd action when Figure 13 is expression by the sewing termination of the dual chain type stitch of another embodiment of stitch anti-loose method of the present invention.
Embodiments of the invention are described below with reference to the accompanying drawings.
Fig. 1 is the whole oblique view that is applicable to doublet interlock seam sewing machine of the present invention.Have the shank 1 that moves up and down on the cantilever portion A of this doublet interlock seam sewing machine M, on the B of workbench portion, have the needle plate 2 that is screwed, to the work feed tooth (figure does not show) of arrow F direction work feed material, the lopping device of swinging along the direction of intersecting with cloth feeding direction F 3.Left pin 4 and right pin 5 are installed on the front end of above-mentioned shank 1.The leading section of pin 4, pin 5 is owing to moving up and down of shank 1 run through needle plate 2.The leading section that lopping device 3 clips the left and right sides pin 4,5 that runs through needle plate 2 swing of between progressive position and going-back position, advancing and retreat.On the leading section of pin 4, pin 5, be provided with pin hole 4a, the 5a that is used to run through eedle line 6,7 in addition, on the leading section of lopping device 3, be provided with the pin hole 3a that is used to run through looper thread.Owing in pin hole 4a, 5a, put on the left and right sides pin 4,5 of eedle line 6,7 and the co-operating of in pin hole 3a, putting on the lopping device 3 of looper thread 8, to shown in Figure 11, just formed dual chain type stitch S as Fig. 7.
Fig. 2～Fig. 4 is that the stitch of doublet interlock seam sewing machine of the present invention is prevented the vertical view of the major part of back-off assembly.The left side of needle plate 2 has promptly disposed looper thread cutter 9 on the leading section of Sewing machines head B.Looper thread cutter 9 by hook-shaped cutting knife 11 (looper thread combining mechanism), bear cutting knife 12 and holddown spring 13 and constitute, above-mentioned hook-shaped cutting knife 11 is formed on the leading section of hook 10, the above-mentioned cutting knife 12 that bears cuts off looper thread 8 with hook-shaped cutting knife 11 co-operatings, and above-mentioned holddown spring 13 overlays hook-shaped cutting knife 11 below bearing cutting knife 12.Looper thread cutter 9 has the swinging advance and retreat swing mechanism 14 (aftermentioned) that moves each member 11,12,13.
Fig. 5 and Fig. 6 are the exploded perspective view of relation between the above-mentioned swinging advance and retreat swing mechanism 14 of explanation and this mechanism 14 and each member 11,12,13 and its assembled state figure.Substrate 15 is fixed on the leading section of the sewing support B of portion by screw 16.On this substrate 15, be formed with circular hole 17 and hook-shaped cutting knife motion guide with crooked slotted hole 18.Rotatably chimeric rotating member 19 on circular hole 17.On rotating member 19, be formed with the groove 19a that extends along its diametric(al), chimeric slidably the pars intermedia that roughly becomes the swing arm 20 of L word shape in this groove 19a.The side, upper end of rotating member 19 is entrenched in the elliptical aperture 21a, and this elliptical aperture 21a is formed on cutting knife and supports fixing guide plate 22 in the upper end of rotating member 19 with screw 23 on the platform 21.Thus, clip swing arm 20, cutting knife support platform 21 and substrate 15 with rotating member 19 and guide plate 22.In circular hole 17 rotating member 19 and guide plate 22 are rotatably remained on the substrate 15, meanwhile, swing arm 20 and cutting knife support that platform 21 slidably and rotatably is directed to by rotating member 19.
Sliding part 26 is entrenched in crooked slotted hole 18 and is located in the circular hole 20a on the end of swing arm 20.Sliding part 26 usefulness screws 25 are installed on the end 24a of connecting rod 24, and connecting rod 24 is that the center is rotatably connected on the swing arm 20 with the circular hole 20a of swing arm 20.On the other end 20b of swing arm 20, fixing the base end part of hook-shaped cutting knife 11 with screw 27.Sliding part 29 is entrenched in the circular hole 24b and crooked slotted hole 18 of the other end that is located at connecting rod 24, installs with screw 28 and does on the upper end 30b of moving plate 30.Making moving plate 30 usefulness screws 31 is installed on the piston rod 32a of cylinder 32.Fixing prerotation vane 32b on cylinder 32, be entrenched in two gangs of 30a of portion that are located at the lower end of making moving plate 30 by prerotation vane 32b, making and making moving plate 30 is not the center rotation with the piston rod.Bear that cutting knife 12, holddown spring 13 and line ball spring 33 are clamped by screw 34 and carriage 35 and adjustable positions be installed in the peripheral part of cutting knife supporting station 21.Line ball spring 33 is regulated by compressing regulating spring 37 to the thrust of hook-shaped cutting knife, and this compresses regulating spring 37 and is installed in cutting knife by screw 36 and supports on the platform 21, and this adjusting is by screw 36 and compress compressing between the regulating spring 37 and carry out.
As Fig. 2～Fig. 4 and shown in Figure 6, on the sewing support B of portion, be provided with limiting member 38, have the 38a of restriction portion of cutting knife supporting station 21 usefulness and the 38b of restriction portion of swing arm 20 usefulness on this limiting member 38, in addition, on substrate 15, installed and turned round helical spring 41,42 with screw 39,40.Turned round helical spring 41 1 ends and the recess 21b butt that is positioned at the cutting knife supporting station 21 on the long axis of elliptical aperture 21a, the sidepiece 15a butt of the other end and substrate 15.Turned round helical spring 42, one ends and limiter 44 butts that are installed in screw 43 on the cutting knife supporting station 21, the sidepiece 15b butt of the other end and substrate 15.Cutting knife is supported platform 21 owing to turned round rotation and the turnover of the pushing of helical spring 41,42 around rotating member 19, and the guiding face 44a of limiter 44 contacts with the leading section of swing arm 20.
On the swinging of above-mentioned formation advance and retreat swing mechanism 14, as shown in Figure 2, the state on the 18a end of crooked slotted hole 18 of being combined in sliding part 26 is as origin position.When driving above-mentioned cylinder 32 from this state along a direction, its driving force is delivered on the connecting rod 24 by making moving plate 30, so sliding part 26 moves along crooked slotted hole 18.Follow this to move, swing arm 20 slides in the groove 19a of rotating member 19 on one side and swings around the centre of gyration of rotating member 19 on one side.Because this swing is by being turned round the effect of helical spring 41,42, cutting knife support platform 21 moves to the 38a of restriction portion of limiting member 38 always and contacts.Just constitute above-mentioned looper thread cutter 9 hook-shaped cutting knife 11, bear the position that cutting knife 12 and holddown spring 13 move to Fig. 3 integratedly.When continuing to a direction driving cylinder 32, slide mass 26 moves along the 18b of crooked slotted hole 18.Because should move, only swing arm 20 moves to the 38b of restriction portion of limiting member 38 and contacts always, as shown in Figure 4, above-mentioned hook-shaped cutting knife 11 moves to arrow b direction.When driving above-mentioned cylinder 32 to another direction, only hook-shaped cutting knife 11 moves to the position of readiness that Fig. 3 bears cutting knife 12 and holddown spring 13 like that from the state of Fig. 4.When continuing when other direction drives cylinder 32, above-mentioned hook-shaped cutting knife 11, bear the origin position that cutting knife 12 and holddown spring 13 move to Fig. 2 integratedly.
The right side of needle plate 2 is the base end part of sewing machine head B such as Fig. 7～be provided with eedle line cutter 45 shown in Figure 13ly among Fig. 1.This eedle line cutter 45 can switch to the active position and the position of readiness that leaves the mobile road of lopping device 3 near the mobile road of lopping device 3 as the wire cutter of recording and narrating on the fair 5-68280 communique of spy.Hook-shaped cutting knife 46, in above-mentioned active position above the 3a of sheet portion of lopping device 3 between progressive position and going-back position back and forth advance and retreat move.Be set up in parallel in conjunction with the hook 47 of looper thread 8 with in conjunction with the hook 48 (the eedle toe-in closes mechanism) of eedle line at the leading section of this hook-shaped cutting knife 46.On the reciprocal advance and retreat motion road of hook-shaped cutting knife 46, disposing and bearing cutting knife 49 and hook-shaped cutting knife 46 is crimped on the holddown spring 50 that bears on the cutting knife 49.
Below with reference to Fig. 7～Figure 12, describe with the sewing thread anti-loose method of the anti-back-off assembly of the stitch of above-mentioned such doublet interlock seam sewing machine that constitutes to the sewing termination portion of dual chain type stitch S.
In this doublet interlock seam sewing machine, the work feed tooth that cloth has been omitted by diagram is sent to along arrow F direction, by being through the eedle line 6,7 on the left and right sides pin 4,5 and being through the dual chain type stitch S that looper thread 8 on the lopping device 3 forms needle tracking form 406.And as shown in Figure 7 when near the sewing terminal of this stitch S at eedle 4,5 are in top dead-centre, lopping device 3 swings in the state of progressive position, if drive the cylinder 32 in the above-mentioned swinging advance and retreat swing mechanism 14 and make looper thread cutter 9 integral body move to the position of Fig. 4 from the origin position of Fig. 2 to a direction, as shown in Figure 8, the front end hook 10 of its hook-shaped cutting knife 11 enters among the triangle P of the line that is formed by looper-thread loop 8L and needle thread loop 6L, above-mentioned looper-thread loop 8L links lopping device 3 from cloth W, and above-mentioned needle thread loop 6L is the needle thread loop 6L that is attached on the lopping device 3, among the 7L one (the 1st step) in left side.
At this state, be that the front end hook 10 of hook-shaped cutting knife 11 enters under the state among the triangle p of line, when the driving Sewing machines is walked 1 pin, eedle 4,5 are fallen into by looper-thread loop 8L and needle thread loop 6L by the top, in the triangle P of the line that 7L forms, lopping device 3 is by eedle 4,5 rear flank, front is retired moving, looper thread 8 is combined on the hook 10 in the position, front of eedle 4, thereby the combined maintenance of looper-thread loop 8L, meanwhile, be accompanied by the swing of advanced position once more of above-mentioned lopping device 3, by above-mentioned eedle 4, the 5 new needle thread loop 6L that form, 7L is holded with both hands with both hands to get by lopping device 3 becomes state shown in Figure 9 (second step).
Then to the cylinder 32 of other direction driving in above-mentioned swinging advance and retreat swing mechanism 14, when with the hook-shaped cutting knife 11 of above-mentioned looper thread cutter 9 when the state of Fig. 4 is shifted as shown in fig. 3 the position of readiness that bears cutting knife 12 and holddown spring 13, cut off in conjunction with the sustained cutting knife 12 of the looper-thread loop 8L that remains on above-mentioned hook 10, the looper thread end 8e that links to each other with cloth W shortens, meanwhile, the thread end 8f that has cut off is clamped maintenance by hook-shaped cutting knife 11 and holddown spring 13.Then, the cylinder and the solenoid that have omitted by diagram, hook-shaped cutting knife 46 in the eedle line cutter 45, bear cutting knife 49 and holddown spring 50 and switch to active position from position of readiness, meanwhile, hook-shaped cutting knife 46 is driven to left along the top of the 3b of sheet portion of lopping device 3 and advances, this hook-shaped cutting knife 46 passes in the circle of above-mentioned needle thread loop 6L1,7L1, and its front end hook 47,48 is shifted to the left side (Figure 10) of eedle lowering position.
Then, cylinder 32 in the above-mentioned swinging advance and retreat swing mechanism is further driven to other direction, the hook-shaped cutting knife 11 of above-mentioned looper thread cutter 9, bear cutting knife 12 and holddown spring 13 origin position from the position of readiness involution of Fig. 3 to Fig. 2, meanwhile, the hook-shaped cutting knife 46 in the above-mentioned eedle line cutter 45 be driven along the top of the blade portion 3b of lopping device 3 retreat into right-hand.At this moment, as shown in figure 11, looper thread 8 is incorporated on the front end hook 47, and simultaneously, above-mentioned needle thread loop 6L1,7L1 are captured and are attached on another hook 48.Under this state, above-mentioned hook-shaped cutting knife 46 further retreats to right-hand, the sustained cutting knife 49 of needle thread loop 6L1,7L1 that is combined on the hook 48 cuts off, and in addition, the looper thread 8 that is incorporated on the front end hook 47 slowly is pulled out from needle thread loop 6L2, the 7L2 of sewing termination.And, hook-shaped cutting knife 46, bear cutting knife 49 and holddown spring 50 and switch to position of readiness from active position.As shown in figure 12, above-mentioned line end 8f compacted spring 50 that has cut off and hook-shaped cutting knife 46 clamp and keep waiting for sewing (the 3rd step) next time.
As described above, sewing termination portion at dual chain type stitch S, the front end hook 10 of hook-shaped cutting knife 11 is entered among the triangle P of the line that is formed by looper-thread loop 8L and needle thread loop 6L, above-mentioned looper-thread loop 8L from cloth W link lopping device 3, above-mentioned needle thread loop 6L is incorporated on the lopping device 3, and, owing to when cutting off,, just can shorten the length of the end of a thread 8e that is connected with cloth W side by cutting machine needle thread loop 6L1,7L1 in conjunction with the looper-thread loop 8L that remains on here.In addition, because at needle thread loop 6L1, when 7L1 cuts off, have only the end of a thread 8f that is cut off side from needle thread loop 6L2, the 7L2 of sewing termination, to extract, so can prevent unclamping from the stitch of sewing termination.
In the above-described embodiments, though be illustrated with regard to following action, promptly, under the front end hook 10 of above-mentioned hook-shaped cutting knife 11 enters state among the triangle P of line, walk a pin by driving Sewing machines, lopping device 3 is swung to progressive position once more, above-mentioned front end hook 10 combines with looper thread 8, and the action that keeps looper-thread loop 8L, but, enter under the state among the triangle P of line (with reference to Fig. 8) at the front end hook 10 of above-mentioned hook-shaped cutting knife 11, drive Sewing machines and walk half pin, as illustrated in fig. 13 lopping device 3 is swung to going-back position, make looper-thread loop 8L in conjunction with remaining on the above-mentioned front end hook 10, from this state, drive cylinder 32 in the above-mentioned swinging advance and retreat swing mechanism to other direction, by the hook-shaped cutting knife 11 of above-mentioned looper thread cutter 9 is moved to the position of readiness that bears cutting knife 12 and holddown spring 13 shown in Figure 3 from the state of Fig. 4, the combined sustained cutting knife 12 of looper-thread loop 8L that remains on the above-mentioned hook 10 cuts off, thereafter, even walk half pin from the back position of lopping device 3 to drive Sewing machines, make this lopping device 3 swing to progressive position as illustrated in fig. 10 and cut off the new needle thread loop 6L1 that lopping device 3 holds with both hands with both hands and gets, the mode of 7L1 is moved, the same with the foregoing description, link the length of the end of a thread 8e of cloth W side and can cut very shortly, the while also can prevent unclamping from the stitch of sewing termination.
In addition, in the above-described embodiment,, looper thread cutter 9 prior to 45 actions of eedle line cutter, also can or be put upside down it and be moved in proper order their whiles though cut off action with regard to line.In this case, preferably make hook 47 arrival bear cutting knife 49 and cut off the looper thread 8 that is attached to hook 47.In addition, walk the starting control etc. of a pin or half pin and each cutter 9,45 and just be not described in detail about driving Sewing machines.They can utilize known motor of sewing machine rotary controlling mechanism and known method such as control according to the signal that is located at the detector on the main shaft.
As mentioned above, each technical scheme uses the doublet interlock seam sewing machine when forming the stitch of regulation on the cloth according to the present invention, in near arriving sewing terminal, combining mechanism enters by after in the triangle of looper-thread loop and the formed line of needle thread loop, because cutting machine needle thread loop when cutting off in conjunction with the looper-thread loop that remains on here, the length of linking the end of a thread of cloth side is cut into very short, does not need to cut off by hand the end of a thread, can obtain the good sewings of outward appearance.Above-mentioned looper-thread loop is linked the lopping device from cloth, and above-mentioned needle thread loop is incorporated on the lopping device.
In addition, according to the present invention, because the advance and retreat driving mechanism of the hook-shaped cutting knife of looper thread cutter and the dual-purposeization of looper thread combining mechanism and looper thread cutter and looper thread combining mechanism is a simple swinging advance and retreat driving mechanism in the mechanism, therefore, the integral body of device do easily simple structure and compactness.
Claims (4)
1. the method that prevents stitch loosening of a doublet interlock seam sewing machine, it is characterized in that in by first step with the doublet interlock seam sewing machine tailoring cloth process that has eedle and lopping device, second step and third step constitute, above-mentioned eedle is put on the eedle line and is moved up and down and be at least one, above-mentioned lopping device is clamped this eedle and advance and retreat swing between progressive position and going-back position, and put on and the common looper thread that forms dual chain-type stitch stitch of above-mentioned eedle line, above-mentioned first step is: swing under the state of progressive position at above-mentioned lopping device, combining mechanism enters in the triangle of the line that is formed by looper-thread loop and needle thread loop; Above-mentioned looper-thread loop is linked the lopping device from cloth, and above-mentioned needle thread loop combines with above-mentioned lopping device; Above-mentioned second step is: enter at above-mentioned combining mechanism under the state of triangle of line, drive Sewing machines and walk 1 pin, once more above-mentioned lopping device is swung to progressive position, combine with looper thread by above-mentioned combining mechanism and keep looper thread; Above-mentioned third step is: when cutting off the looper-thread loop that remains on the above-mentioned combining mechanism, cut off the needle thread loop that is combined on the lopping device.
2. the method that prevents stitch loosening of a doublet interlock seam sewing machine, it is characterized in that, have in the doublet interlock seam sewing machine tailoring cloth process of eedle and lopping device by first step in use, second step and third step constitute, above-mentioned eedle is put on the eedle line and is moved up and down and be at least one, above-mentioned lopping device is clamped eedle and advance and retreat swing between progressive position and going-back position, and put on and the common looper thread that forms dual chain type stitch of above-mentioned eedle line, the above-mentioned first step is to swing under the state of progressive position at above-mentioned lopping device, combining mechanism enters in the triangle of the line that is formed by looper-thread loop and needle thread loop, this looper-thread loop is linked the lopping device from cloth, and this needle thread loop is attached on the lopping device; Second step was under above-mentioned combining mechanism enters state in the triangle of line, driving Sewing machines walks half pin and above-mentioned lopping device is swung to going-back position, above-mentioned combining mechanism is attached on the looper thread and keeps after the looper-thread loop, cut-out remains on the looper-thread loop on this combining mechanism, above-mentioned third step is: drive Sewing machines and walk half pin the lopping device is swung to progressive position from the going-back position of above-mentioned lopping device, cut off the needle thread loop that is attached on the lopping device.
3. the device that prevents stitch loosening of a doublet interlock seam sewing machine, it is characterized in that, in the doublet interlock seam sewing machine that has eedle and lopping device, possess the looper thread combining mechanism is arranged, the looper thread cutter, the eedle toe-in closes mechanism and eedle line cutter, above-mentioned eedle is put on the eedle line and is moved up and down and be at least one, above-mentioned lopping device is clamped eedle and is advanced and retreat between progressive position and going-back position and swing and put on and the common looper thread that forms dual chain type stitch of above-mentioned eedle line, above-mentioned looper thread combining mechanism enters in the triangle of the line that is formed by looper-thread loop and needle thread loop under above-mentioned lopping device swings to the state of progressive position and keeps looper-thread loop, above-mentioned looper-thread loop is linked the lopping device from cloth, above-mentioned needle thread loop combines with above-mentioned lopping device, above-mentioned looper thread cutter cuts off the looper-thread loop that remains on this looper thread combining mechanism, above-mentioned eedle toe-in closes mechanism and catches the needle thread loop be attached on the above-mentioned lopping device, and above-mentioned needle thread loop cutter cuts off and captures this eedle toe-in and close eedle line in the mechanism.
4. the device that prevents stitch loosening of doublet interlock seam sewing machine as claimed in claim 3, it is characterized in that, above-mentioned looper thread cutter is by hook-shaped cutting knife and bear cutting knife and constitute, above-mentioned hook-shaped cutting knife has swinging advance and retreat driving mechanism, and dual-purpose looper thread combining mechanism, above-mentioned bear cutting knife at this hook-shaped cutting knife when keeping above-mentioned looper-thread loop and retreating into certain position, cut off its looper-thread loop.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP235035/97 | 1997-08-29 | ||
| JP23503597A JP3527835B2 (en) | 1997-08-29 | 1997-08-29 | Method and apparatus for preventing seam fraying of double chain stitch sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1210164A true CN1210164A (en) | 1999-03-10 |
Family
ID=16980130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98115550A Pending CN1210164A (en) | 1997-08-29 | 1998-06-30 | Method and device for preventing seam from being loosen of double stitches of sewing machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3527835B2 (en) |
| CN (1) | CN1210164A (en) |
| TW (1) | TW363621U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002828A (en) * | 2009-08-31 | 2011-04-06 | 飞马缝纫机制造株式会社 | Stitch ravelling prevention method and its device |
| CN1847503B (en) * | 2005-04-14 | 2012-01-11 | 大和缝纫机制造株式会社 | Seam ravel preventing apparatus and ravel preventing method |
| CN101265643B (en) * | 2007-03-15 | 2012-05-30 | 大和缝纫机制造株式会社 | Sewing machine with wire-cutting device |
| CN102926142A (en) * | 2011-08-08 | 2013-02-13 | 大和缝纫机制造株式会社 | Multi-thread chain stitch sewing machine with seam ravel preventing apparatus |
| CN110621819A (en) * | 2017-05-11 | 2019-12-27 | L&P产权管理公司 | Quilting machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW517723U (en) | 1999-11-09 | 2003-01-11 | Yamato Sewing Machine Mfg | Apparatus for preventing raveling of seam |
| JP2007075362A (en) * | 2005-09-14 | 2007-03-29 | Yamato Sewing Mach Co Ltd | Stitch structure |
-
1997
- 1997-08-29 JP JP23503597A patent/JP3527835B2/en not_active Expired - Fee Related
-
1998
- 1998-05-26 TW TW087208195U patent/TW363621U/en unknown
- 1998-06-30 CN CN98115550A patent/CN1210164A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847503B (en) * | 2005-04-14 | 2012-01-11 | 大和缝纫机制造株式会社 | Seam ravel preventing apparatus and ravel preventing method |
| CN101265643B (en) * | 2007-03-15 | 2012-05-30 | 大和缝纫机制造株式会社 | Sewing machine with wire-cutting device |
| CN102002828A (en) * | 2009-08-31 | 2011-04-06 | 飞马缝纫机制造株式会社 | Stitch ravelling prevention method and its device |
| CN102002828B (en) * | 2009-08-31 | 2013-11-06 | 飞马缝纫机制造株式会社 | Stitch ravelling prevention method and its device |
| CN102926142A (en) * | 2011-08-08 | 2013-02-13 | 大和缝纫机制造株式会社 | Multi-thread chain stitch sewing machine with seam ravel preventing apparatus |
| CN102926142B (en) * | 2011-08-08 | 2016-12-21 | 大和缝纫机制造株式会社 | Burst at the seams the double-strand ring sewing machine of device with anti-stitching |
| CN110621819A (en) * | 2017-05-11 | 2019-12-27 | L&P产权管理公司 | Quilting machine |
| CN110621819B (en) * | 2017-05-11 | 2021-08-03 | L&P产权管理公司 | Quilting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1170281A (en) | 1999-03-16 |
| TW363621U (en) | 1999-07-01 |
| JP3527835B2 (en) | 2004-05-17 |
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