CN1263960A - Multi-needle double-thread chain stitch machine - Google Patents
Multi-needle double-thread chain stitch machine Download PDFInfo
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- CN1263960A CN1263960A CN99126704A CN99126704A CN1263960A CN 1263960 A CN1263960 A CN 1263960A CN 99126704 A CN99126704 A CN 99126704A CN 99126704 A CN99126704 A CN 99126704A CN 1263960 A CN1263960 A CN 1263960A
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- thread
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- looper
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Abstract
To surely form multi-thread chain stitches by engaging a needle thread between a pair of thread guides with one cam surface when a needle is lowered to a thread triangle accompanying the lowering of a needle bar and maintaining engagement with the other cam surface until a looper advances and scoops a needle thread loop while the needle rises through a bottom dead center. When a needle bar 1a is at a top dead center, the respective needle threads 4 and 5 inserted to a pair of needle bar thread handling area 14 are not engaged with the cam surface of a loop spreading 15 and are positioned at an upper part. Then, when the needle bar 1a is lowered and the angle of a sewing machine main shaft M reaches close to 90 deg., the tip of a left needle 1 reaches the thread triangle including a looper thread 6, then a right needle 2 reaches between the needle threads of the thread triangle on the left and right and thereafter, the loop spreading amount of a left needle thread and a right needle thread successively becomes maximum. Then, when each of the needles 1 and 2 rises through the bottom dead center, the looper 3 advances and the needle thread loops formed at each of the needles 2 and 3 are successively scooped. At the time, the second cam surface of the loop spreading is engaged with the needle threads 4 and 5 and the loops are surely scooped.
Description
The present invention relates to multi-needle double-thread chain stitch machine, especially can on the lining that approaches, do not have body bone (not well-pressed), form two pins or the three pin double-thread overlock sewing machines of good two-thread chain stitch.
As shown in figure 10, existing multi-needle double-thread chain stitch machine with two pins 1,2, about having side by side configuration and the lower end of right pin 2 be higher than the lower end of left pin 1 and be fixed on two pins 1,2 of shank lower end and from the right side to the looper (looper) 3 of each pin advance and retreat.As shown in Figure 9, two-thread chain stitch is to form like this, a left side pin 1 and right pin 2 respectively to by hang over that looper 3 forms the left needlework 4L of ring-type and needlework 5L and from lining (omitting diagram) via the pin hole 3e of looper along the thread triangle decline of looper thread 6 formations of looper 3, rising through bottom dead centre, simultaneously, looper 3 retreats, looper 3 is before right dead point and then fish for formed new needle thread loop on the pin of the left and right sides.
In order on lining, to form two-thread chain stitch S, be configuration pin thread control device 8 (Figure 10) between the needlework path of each pin 1,2 and tension disk group 7a, 7b, 7c with the double-thread overlock sewing machine of said structure in the past.This needlework control device 8 is by the shank cable guiding device 9a that is fixed on shank 1a upper end, be fixed on that cable guiding device carriage 10, one ends on the sewing machine arm are fixed on axis of rocking 11, another free end is that the line device 12 that stretches tight that the center is shaken constitutes by through wires hole 12a, 12b and with axis of rocking 11.Shank cable guiding device 9 is a starting point to extending with the opposite direction of the cloth throughput direction F of above-mentioned Sewing machines with the upper end of shank 1a, and its front end has several cable guiding devices 9a, 9b.Shank cable guiding device 9 carries out lifting with the elevating movement interlock of shank 1a.Cable guiding device carriage 10 has cable guiding device 10a, the 10b that is provided with for indivedual guiding left and right sides needlework 4,5, and each cable guiding device upper-lower position is separately fixed on the cable guiding device carriage 10 adjustablely, and right cable guiding device 10b is higher than left cable guiding device 10a.In addition, cable guiding device carriage 10 is fixed by slotted hole 10h and screw 13 upper-lower positions adjustablely, and can be by its unified upper-lower position of regulating each cable guiding device 10a, 10b.Axis of rocking 11 shakes linkedly with the elevating movement of shank 1a.In order to guide needlework 4,5 individually, needlework 4,5 pass several through wires holes 12a, the 12b of the line device that stretches tight respectively.Tension disk group 7 is made of the tension disk 7a, the 7b that dispose for left and right sides needlework 4,5 and the tension disk 7c that disposes for looper thread 6, in order to give tension force to corresponding line.
Figure 11 represents the line amount that stretches tight by controlled each needlework 4,5 between the needlework path of the pin 1,2 of Sewing machines among Figure 10 and cable guiding device 10a, 10b.Among the figure, longitudinal axis E represents the line amount that stretches tight (mm) of each needlework 4,5, and transverse axis A represents the circle rotation amount of machine spindle M, promptly is equivalent to form 360 degree of the angle of a stitching process.When machine spindle M is 0 ° in angle, each comfortable top dead-centre of left and right sides pin.The angle of machine spindle M is near 90 ° the time, and left side pin 1 drops on the aforementioned thread triangle; Machine spindle M is near 120 ° the time, and right side pin 2 drops on the aforementioned thread triangle, and the angle of machine spindle M is near 210 ° the time, and looper 3 hooks the new needle thread loop that forms on the right side pin 2; The angle of machine spindle M is near 240 ° the time, and looper 3 hooks the new needle thread loop that is formed by left side pin 1.The line amount that stretches tight of left side needlework 4 increases near 10 °, reaches maximum near 180 °, becomes zero near 330 °.The line amount that stretches tight of right needlework 5 increases near 20 °, reaches maximum near 170 °, becomes zero near 340 °.The angle of machine spindle M near from 50 ° to 340 ° near between, the line amount that stretches tight of right needlework surpasses the line amount that stretches tight of left needlework.
Yet, in above-mentioned this existing apparatus, as shown in figure 11, the angle of machine spindle is after 240 °, promptly when pin rises through bottom dead centre, begin to loose ends the top dead-centre very insufficiently from the advance time point that hooks right needle thread loop of looper, reduce through the right needlework amount of ring-type that the looper belly extends to cloth from pin.Therefore, the looper thread that is connected to the looper pin hole from cloth is attached to the belly of looper because of the effect of the right needlework of ring-type.As a result, right pin is declined by less than in the thread triangle that is formed by right needlework of ring-type and looper thread, causes so-called " backhaul bouncing pilotage " problem easily.
Therefore, the object of the present invention is to provide a simple structure of usefulness to address the above problem, can form really the multi-needle double-thread chain stitch machine of two-thread chain stitch.
The 1st related multi-needle double-thread chain stitch machine of invention of the present invention, to achieve these goals, it has: about the shank lower end side by side configuration, right pin lower end is fixed at least two pins of shank lower end and the looper of advancing and retreat towards each pin from the right side with being higher than left pin lower end.Moving by pin and looper association, after hanging over the needlework that form ring-type on the looper and forming thread triangle via the pin hole of looper and looper thread along looper from cloth, on cloth, form two-thread chain stitch, it is characterized by: have a pair of thread guide that is fixed on the shank upper end and several through wires holes relatively are provided with, with be fixed on the Sewing machines body, and forming from the line device that stretches tight of convex surface continuous between a pair of thread guide of both direction crosscut, follow the decline of above-mentioned shank, when pin drops to above-mentioned thread triangle, needlework between a pair of thread guide engage with a side convex surface, and pin is when bottom dead centre rises, looper advances till hooking needle thread loop, needlework between a pair of thread guide keep and the engaging of another side convex surface always, and order is removed and the engaging of both sides convex surface then.
The multi-needle double-thread chain stitch machine that claim 2 relates to is characterized in that: begin to remove engaging of convex surface and needlework on one side from the needlework that pass rightmost side pin.
The device that claim 3,4 relates to is characterized in that: the path of each needlework and the needlework same length of passing on the pin of right side between the above-mentioned thread guide when engaging with the opposing party's convex surface.
According to above-mentioned the 1st invention, follow the decline of above-mentioned shank, when pin drops to above-mentioned thread triangle, each needlework between a pair of thread guide engage in proper order with the convex surface on above-mentioned one side.And through bottom dead centre and when rising, looper advances till hooking needle thread loop, each needlework is kept and the engaging of the opposing party's convex surface at pin, and order is removed and the engaging of above-mentioned two convex surfaces then.Each needlework after the releasing are sharply lax, hang over each needlework that forms ring-type on the looper looper thread that is connected to the looper pin hole from cloth is attached on the looper.
According to the application's the 2nd invention, the joint of removing each needlework in the above-mentioned thread triangle will begin from the ring-type needlework of the rightmost side to carry out.
According to the application's invention 3,4, the right needlework ratio in the stitching is big.
Fig. 1 is the outward appearance oblique view that is applicable to multi-needle double-thread chain stitch machine of the present invention.Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 are the key diagrams of wanting portion of Fig. 1 Sewing machines.Fig. 8 is the key diagram of the line amount that stretches tight of each needlework of Sewing machines of Fig. 1.Fig. 9 is the stitching pie graph that existing two pin double-thread overlock sewing machines form.Figure 10 is the outward appearance oblique view of existing two pin double-thread overlock sewing machines.Figure 11 is the stretch tight key diagrams of line amount of existing each needlework of multi-needle double-thread chain stitch machine.
Below, according to accompanying drawing embodiments of the invention are described, but omitted explanation with existing Sewing machines same section.Fig. 1 is the whole oblique view of the two pin double-thread overlock sewing machines that the present invention relates to.At the fixing a pair of shank cable guiding device 14,14 in the upper end of shank 1a.A pair of shank cable guiding device 14,14 is to extending with the opposite direction of above-mentioned sewing machine cloth throughput direction F, and its front end is bent upwards.Leading section at the shank guider 14,14 that is bent upwards is disposing left needlework wire guide 14a, 14a and right needlework wire guide 14b, 14b on the part relatively.As shown in Figure 2, two wire guide 14a, 14b are along with relative with above-mentioned cloth throughput direction F and become the direction of lifting in the place ahead and disposing, and along the direction of intersecting with the lifting direction of shank 1a.Left side needlework are lower than right needlework with wire guide 14b, 14b and be set in the rear side of cloth throughput direction F with wire guide 14a, 14a.
On the machine cantilever A that constitutes a Sewing machines body part, disposing when working as shank 1a lifting with above-mentioned shank cable guiding device 14,14 between the line device 15 that stretches tight that combines of each needlework.This line device 15 of stretching tight forms to the 1st cam 15a relative with above-mentioned cloth throughput direction F and that extend to the direction that lift the front upper place with along the 2nd convex surface 15b of the lifting direction extension of shank 1a.Be fixed on the support 18 by the 1st slotted hole 16 and screw 17 between two wire guides of the above-mentioned shank cable guiding device 14,14 of the 1st cam 15a crosscut.Support 18 is fixed on the sewing machine arm by the 2nd slotted hole 19 and screw 20.Can change the fixed position up and down along the lifting direction of shank 1a by the 2nd slotted hole 19 of support 18 and the screw 20 line device 15 that stretches tight, regulate the time that it engages with each needlework 4,5 between the shank cable guiding device 14,14.Stretching tight line device 15 can be along change fixed position in ground before and after the above-mentioned cloth throughput direction F by the 1st slotted hole 16 of support 18 and screw 17, thus the path that can regulate each needlework 4,5 between the wire guide.Left and right sides needlework cable guiding device 10a, 10b are set at same height substantially.
What the left side needlework 4 used of pin did not show from the figure passes the pin hole of left pin 1 for line source through the stretch tight through wires hole 12a of line device, wire guide 14a, the 14a of shank cable guiding device of tension disk group's tension disk 7a, the needlework cable guiding device 10a of needlework carriage, needlework, and what the needlework 5 that right pin is used did not show from the figure passes the pin hole of right pin 2 for line source through the stretch tight through wires hole 12b of line device, wire guide 14b, the 14b of shank cable guiding device of tension disk group's tension disk 7b, the cable guiding device 10b of needlework carriage, needlework.
Below, with reference to Fig. 2 to Fig. 8 the effect of the present invention's two pin double-thread overlock sewing machines of said structure is described.
As shown in Figure 8, the angle of machine spindle M is 0 °, be shank 1a when top dead-centre, be through each needlework 4,5 in each wire guide of a pair of shank cable guiding device 14,14 and do not engage and be positioned at top (Fig. 2) with the 1st cam 15a of the line device 15 that stretches tight.Follow the decline of shank 1a, the line amount that stretches tight of each needlework 4,5 all rises near 20 ° roughly the samely.In the time of near the angle of machine spindle M arrives 90 °, the front end of left pin 1 arrives by hanging over looper 3 and forming the needlework 4L of ring-type and the thread triangle (with reference to Fig. 9) that forms along with the looper thread 6 of looper 3 through looper pin hole 3e from cloth.At this moment, as shown in Figure 3, pass left pin and engage with the 1st convex surface 15a of the line device 15 that stretches tight with the left needlework 4 between wire guide 14a, the 14a.
Shank 1a continues to descend then, in the time of near the angle of machine spindle M arrives 120 °, right pin 2 arrive by hang over looper 3 and form the needlework 5L of ring-type and from cloth between the needlework 4L of looper pin hole 3e and the thread triangle that forms along with the looper thread 6 of looper 3 and needlework 5L (with reference to Fig. 9).At this moment, as shown in Figure 4, be through right pin and engage with the 1st convex surface 15a of the line device 15 that stretches tight with the right needlework 5 between wire guide 14b, the 14b.Shank 1a continues to descend again, and in the time of near the angle of machine spindle M arrives 130 °, it is maximum that the line amount that stretches tight of left needlework reaches.In the time of near the angle of machine spindle M arrives 170 °, it is maximum that the line amount that stretches tight of right needlework reaches.At this moment, the needlework 4,5 that are bonded between each wire guide of the 1st convex surface 15a slide to the 2nd convex surface 15b, and keep its engagement state (Fig. 5).Under this engagement state, the path of the needlework 5 between wire guide 14b, the 14b is longer than the path of the needlework between wire guide 14a, the 14a 4.
The pin 1,2 that is fixed on shank 1a lower end rises through bottom dead centre, and in the time of near the angle of machine spindle M arrives 210 °, when right pin 2 rose, looper 3 advanced and hooks the new needle thread loop that is formed on the right pin 2.Then, shank 1a rises, and in the time of near the angle of machine spindle M arrives 240 °, when left pin 1 rose, looper 3 advanced and hooks the new needle thread loop that is formed on the left pin 1.In the meantime, each pin 4,5 that is bonded between the shank cable guiding device 14,14 on the 2nd convex surface 15b slides to the 1st convex surface 15a (Fig. 6).The line amount that stretches tight of right needlework is kept maximum before near the angle of machine spindle M arrives 200 °, sharply reduces then.The line amount that stretches tight of left side needlework is kept maximum before near the angle of machine spindle M arrives 230 °, reduces then. Pin 1,2 rises through bottom dead centre, hooks till the new needle thread loop that is formed on the pin 1,2 up to looper 3, and each needlework 4,5 is engaging with the convex surface of the line device 15 that stretches tight always, and therefore, needle thread loop can not twist.This hooks needle thread loop really to looper 3 effect very much.
After looper 3 hooked the needle thread loop that forms on two pins 1,2, the needlework 5 that are bonded between wire guide 14b, the 14b on the 1st convex surface 15a were disengaged joint (Fig. 7), and then, the needlework 4 that are bonded between wire guide 14a, the 14a on the 1st convex surface 15a are disengaged joint.Because the releasing of these joints, the looper thread 6 that is connected to looper pin hole 3e from cloth is not attached on the looper, the result can stably form above-mentioned thread triangle.In addition, under each needlework 4,5 and state that the 2nd convex surface 15b of the line device 15 that stretches tight engages, the length in the needlework path between the right wire guide is than the needlework path length of left pin, and therefore, after removing engagement state, the relax level of right side ring-type needlework is also big than the left side.Its result, the right needlework ratio in the stitching is big, can form the two-thread chain stitch that spread length is arranged on the whole.By the convex surface 15a in the line device 15 that stretches tight, the effect of 15b, the angle of machine spindle M near from 140 ° to 220 ° near between, the line amount that stretches tight of right needlework surpasses the line amount that stretches tight of left needlework, this its basic identical with outer room both sides' the line amount that stretches tight.
Separately the line amount of the existing Sewing machines that adopts Figure 10 during with the stitching sewing machine of the present invention of implementing Fig. 1 is compared as follows shown in the table 1.
[table 1]
| Rotation number (rpm) | Seam length when stitching 50 pins (mm) | Line amount (mm) between seam length | |||
| Left side pin | Right pin | Looper thread | |||
| Sewing machines of the present invention | ?1000 ?4000 | ?87 ?98 | ?205.3 ?209.7 | ?228.7 ?232.3 | ?1148.7 ?1126.7 |
| Existing Sewing machines | ?1000 ?4000 | ?87 ?98 | ?195 ?211.3 | ?200.7 ?198 | ?1170 ?1130 |
Notes) the line amount is the mean value of 5 detected values
As implied above, according to the present invention, when pin rises from bottom dead centre, owing to extend to the ring-type needlework of cloth through the looper belly from pin, and make the looper thread that is connected to the looper pin hole from cloth not be attached on the looper, therefore, can form the effect that above-mentioned thread triangle and acquisition form two-thread chain stitch really.And pin is when bottom dead centre rises, and the needle thread loop that is formed on the pin does not produce distortion, so, can positively hook needle thread loop with looper.
According to claim 2, the releasing of the joint of each needlework in the above-mentioned thread triangle ring-type needlework from the right side are begun to carry out, therefore, can form above-mentioned thread triangle really.
According to claim 3,4,, therefore, can form the two-thread chain stitch that range of extension is arranged on the whole because the right needlework ratio in the stitching is big.
Claims (4)
1. multi-needle double-thread chain stitch machine, it have about the shank lower end configuration side by side, right pin lower end is fixed at least two pins of shank lower end and the looper of advancing and retreat to each pin from the right side with being higher than left pin lower end.By pin cooperate with looper, by after hanging over the needlework that form ring-type on the looper and having formed thread triangle from the looper thread that cloth carries over looper through the pin hole of looper, on cloth, form two-thread chain stitch, it is characterized in that it has a pair of thread guide that is fixed on shank upper end and several through wires holes relatively are provided with and is fixed on the Sewing machines body and is forming from the line device that stretches tight of convex surface continuous between a pair of thread guide of both direction crosscut; Follow the decline of above-mentioned shank, when above-mentioned pin drops to above-mentioned thread triangle, needlework between a pair of thread guide engage with a side convex surface, and at pin when bottom dead centre rises, advance till hooking needle thread loop needlework between a pair of thread guide of looper keep and the engaging of another side convex surface always, and order is removed itself and the engaging of two sides' convex surface then.
2. multi-needle double-thread chain stitch machine as claimed in claim 1 is characterized in that: removing side's convex surface is from the needlework through rightmost side pin with engaging of needlework.
3. multi-needle double-thread chain stitch machine as claimed in claim 1 is characterized in that: the path of each needlework and the needlework same length of passing the right side pin between the above-mentioned thread guide when the opposing party's convex surface is engaged.
4. multi-needle double-thread chain stitch machine as claimed in claim 2 is characterized in that: the path of each needlework and the needlework same length of passing the right side pin between the above-mentioned thread guide when the opposing party's convex surface is engaged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP022496/1999 | 1999-01-29 | ||
| JP02249699A JP3576022B2 (en) | 1999-01-29 | 1999-01-29 | Multi needle double chain stitch machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1263960A true CN1263960A (en) | 2000-08-23 |
| CN1123660C CN1123660C (en) | 2003-10-08 |
Family
ID=12084361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99126704A Expired - Fee Related CN1123660C (en) | 1999-01-29 | 1999-12-14 | Multi-needle double-thread chain stitch machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3576022B2 (en) |
| CN (1) | CN1123660C (en) |
| TW (1) | TW441651U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995300A (en) * | 2011-09-13 | 2013-03-27 | 大和缝纫机制造株式会社 | Method for preventing seam ravel of multi-thread chain stitches, seam ravel preventing apparatus for multi-thread chain stitch sewing machine, and multi-thread chain stitch seam structure |
| CN103132252A (en) * | 2011-11-24 | 2013-06-05 | 飞马缝纫机制造株式会社 | Needle track structure simulating double ring and multi-needle sewing machine forming the needle track |
| CN108026682A (en) * | 2015-04-27 | 2018-05-11 | 百福工业系统与机械有限责任公司 | Spininess chain stitch sewing machine |
-
1999
- 1999-01-29 JP JP02249699A patent/JP3576022B2/en not_active Expired - Fee Related
- 1999-11-15 TW TW88219361U patent/TW441651U/en not_active IP Right Cessation
- 1999-12-14 CN CN99126704A patent/CN1123660C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995300A (en) * | 2011-09-13 | 2013-03-27 | 大和缝纫机制造株式会社 | Method for preventing seam ravel of multi-thread chain stitches, seam ravel preventing apparatus for multi-thread chain stitch sewing machine, and multi-thread chain stitch seam structure |
| CN103132252A (en) * | 2011-11-24 | 2013-06-05 | 飞马缝纫机制造株式会社 | Needle track structure simulating double ring and multi-needle sewing machine forming the needle track |
| CN103132252B (en) * | 2011-11-24 | 2016-12-21 | 飞马缝纫机制造株式会社 | Simulation dual ring stitching structure and many needle sewing machines of this needle tracking of formation |
| CN108026682A (en) * | 2015-04-27 | 2018-05-11 | 百福工业系统与机械有限责任公司 | Spininess chain stitch sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3576022B2 (en) | 2004-10-13 |
| TW441651U (en) | 2001-06-16 |
| JP2000218071A (en) | 2000-08-08 |
| CN1123660C (en) | 2003-10-08 |
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Granted publication date: 20031008 Termination date: 20181214 |
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