CN1107756C - Method and apparatus for preventing stitch from loosening - Google Patents
Method and apparatus for preventing stitch from loosening Download PDFInfo
- Publication number
- CN1107756C CN1107756C CN98115551A CN98115551A CN1107756C CN 1107756 C CN1107756 C CN 1107756C CN 98115551 A CN98115551 A CN 98115551A CN 98115551 A CN98115551 A CN 98115551A CN 1107756 C CN1107756 C CN 1107756C
- Authority
- CN
- China
- Prior art keywords
- eedle
- lopping device
- cloth
- looper thread
- billhook
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The objective of this invention is to prevent a thread from running from the sewing end of a sea and cut the thread end of a looper thread short by providing a step etc., for cutting the looper thread hooked on an engagement means at the engagement part in forming a seam on a fabric with a double chain stitch on a sewing machine with at least one vertical moving needle and horizontal huntting looper. In the end of sewing, a looper is in state of in and out toward left side, a hook at left side of the needle connects cloth with looper thread of the looper. In this state, after driving sewing machine moves a half stitch, the looper thread on the hook is cut off by a first cutter at left side. When the looper is in state of in and out toward left side again, a second cutter at right side cuts needle coiler which connects cloth with the needle via the looper between cloth and the looper.
Description
Technical field
The present invention relates in forming the Sewing machines of dual chain type stitch, to prevent method and device that the sewing thread of the sewing terminal of stitch unclamps.
Background technology
Form dual chain type stitch with the Sewing machines that has eedle and lopping device, when for example forming the stitch shown in the needle tracking form 406 of JISLO120, when when sewing terminal side one is drawn looper thread, stitch can burst forth in succession.As the locking extraction of root of the sewing thread of cloth, the looper thread hook of opening the rear that has proposed to use the lopping device that is arranged on Sewing machines in the flat 6-233877 communique the spy makes and unclamps the scheme that is difficult to take place.The looper thread recorded and narrated in this communique hook keeps looper thread slidably, before being about to sewing termination, in case when stopping Sewing machines, keep looper thread.Under this state, drive Sewing machines and walk a pin cutting machine needlework and looper thread afterwards.The sewing machine operator takes off cloth from Sewing machines under the state that keeps looper thread on the looper thread hook, thus, thereby the interlacing state of eedle line and looper thread has been transformed and is difficult to unclamp.
Yet, there is such difficult point in this way, cut off exactly after the looper thread, the end of a thread president of looper thread remains on the cloth longways, well, just must remove the end of a thread of looper thread once more for outward appearance as sewings.
Summary of the invention
Therefore, problem of the present invention provides a kind of method and uses this square law device, make it with double-thread overlock sewing machine when forming stitch on the cloth, anti-principal vertical line unclamps from the sewing terminal of stitch, and the looper thread that will link sewing terminal again is cut into very short.
The locking extraction of root of stitch of the present invention is characterized in that, with have put on the eedle line and move up and down be at least one eedle and clamp eedle and between progressive position and going-back position advance and retreat swing and putting on above-mentioned eedle line form in the process of stitching sewing machine cloth of lopping device of looper thread of dual chain type stitch, constitute by following three steps, first step: when sewing ends, under the state of lopping device advanced position turnover, by the looper thread of linking the lopping device on the combining mechanism hook from cloth; Second step: under combining mechanism and state that looper thread combines, drive Sewing machines and walk half pin, the lopping device arrives after the going-back position, cuts off the looper thread that colludes on combining mechanism at its binding site; Third step: drive Sewing machines and walk half pin part, the lopping device is in progressive position, between cloth and lopping device, cut off from cloth and link the needle thread loop of eedle, meanwhile, between cloth and lopping device, cut off the looper thread of linking the lopping device from cloth through the lopping device.
Stitch locking device of the present invention is characterised in that, put on the eedle line having, move up and down and be at least one eedle and clamp the eedle swing of between progressive position and going-back position, advancing and retreat, and put in the Sewing machines with the lopping device of the common looper thread that forms dual chain type stitch of above-mentioned eedle line and be provided with the 1st billhook and the 2nd billhook, above-mentioned first billhook is when the lopping device is in progressive position, carry out toward moving from the 1st bearing cutter, combine with position, eedle whereabouts in the sewing machine head and the looper thread that is between the front end of lopping device of progressive position, when the lopping device is in going-back position from the 1st bearing cutter double action, thereby cut off the looper thread of its bound fraction; Above-mentioned the 2nd billhook is after the 1st hook-shaped cutting knife double action, carry out toward moving from the 2nd bearing cutter cutting knife, thereby with link the eedle line of eedle and combine through the lopping device from cloth from the looper thread that cloth is linked the lopping device, by continuing double action since then, the 2nd hook-shaped cutting knife cuts off each line of its bound fraction.
Description of drawings
Fig. 1 is the oblique view of critical component of the Sewing machines of 1 embodiment of the present invention.
The oblique view of the process when Fig. 2 is expression sewing termination of the present invention.
The oblique view of the process when Fig. 3 is expression sewing termination of the present invention.
The oblique view of the process when Fig. 4 is expression sewing termination of the present invention.
The oblique view of the process when Fig. 5 is expression sewing termination of the present invention.
The oblique view of the process when Fig. 6 is expression sewing termination of the present invention.
The oblique view of the process when Fig. 7 is expression sewing termination of the present invention.
The oblique view of the process when Fig. 8 is expression sewing termination of the present invention.
The oblique view of the process when Fig. 9 is expression sewing termination of the present invention.
The specific embodiment
Embodiments of the invention once are described with reference to the accompanying drawings, Fig. 1 represents to use the cylinder bed head part of double-thread overlock sewing machine of the present invention, in cylinder bed portion 1, be equipped with by four direction motion before and after up and down along arrow F direction carry cloth work feed tooth 2, lopping device 3 that left-right and front-back is done elliptic motion, be fixed on the needle plate (diagram is omitted) on the screw 4.Above cylinder bed 1, be provided with the shank 7 that left pin 5 and right pin 6 have been installed.The leading section of left and right sides pin 5,6 is because moving up and down of shank 7 passed needle plate.Lopping device 3 is clamped the front end of the left and right sides pin 5,6 that penetrates needle plate and is swung with the elliptic orbit advance and retreat between progressive position and going-back position.Left and right sides pin 5,6 and 3 co-operatings of lopping device to shown in Figure 9, form dual chain type stitch S with eedle line 8,9 and looper thread 10 as Fig. 2.
This Sewing machines position that eedle falls in the sewing machine head i.e. left side of the position that moves up and down of two eedles 5,6 is provided with the 1st cutter 11 of following formation.The 1st bearing cutter 13 usefulness screws 12 are fixed on the rear portion of cylinder bed 1.The front end of the 1st bearing cutter 13, below needle plate, extend to eedle fall the place near.The 1st billhook 16 usefulness stepped screws 14 are installed in rotation on the front portion a little partially of cylinder bed 1.Leading section at the 1st billhook 16 forms hook (looper thread combining mechanism) 15.Set up holddown spring 17 on other the 1st bearing cutter 13.This holddown spring 17 the rotation by the 1st billhook 16 make hook 15 arrive the 1st bearing cutter 13 front ends below the time, hook 15 be pressed onto bearing cutter 13 below.Rearward end at this billhook 16 is provided with slotted hole 18.
At the left end of cylinder bed 1 cylinder 19 has been installed.On the piston rod 20 of cylinder 19, with screw 22 adjustable positions fixing and making moving plate 21.On make moving plate 21, be provided with pin 23.This pin 23 is entrenched in 18 li of the slotted holes of the 1st billhook 16.In addition, cylinder 19 is connected on the source of high pressure air (diagram is omitted) by managing 24.By the action of air pressure from source of high pressure air, the moving plate 21 of doing that is fixed on the piston rod 20 is advanced and retreat in the direction of arrow A.Because do the advance and retreat motion of moving plate 21, the 1st billhook 16 is swung in the direction of arrow B around stepped screw 14.
Eedle in cylinder bed 1 falls the right side at place, is provided with the 2nd cutter 25 of following formation.The 2nd billhook 28 is back and forth advanced and retreat between progressive position and going-back position along the top of the 3b of sheet portion of lopping device 3 and is moved.On the leading section of the 2nd billhook 28, be set up in parallel 2 hooks 26,27.The 2nd bearing cutter 30 is set on the going-back position of the 2nd hook-shaped cutting knife.On the 2nd bearing cutter 30, set up holddown spring 29.By this holddown spring the 2nd billhook 28 is crimped on the bearing cutter 30, in the going-back position of the 2nd billhook 28, cuts off line with the 2nd bearing cutter co-operating.The 2nd hook-shaped cutting knife 28 is driven by the drive unit of the solenoid of scheming not show or cylinder and so on.
The locking extraction of root of sewing thread when with Fig. 2 to Fig. 9 sewing termination of the present invention being described, as shown in Figure 2, in this Sewing machines, cloth W is carried along arrow F direction by work feed tooth 2.On the cloth W that is transferred by being through the stitch S that eedle line 8,9 on left and right sides pin 6,7 and the lopping device 3 and looper thread 10 form needle tracking form 406 respectively.Roughly be in top dead-centre at sewing termination and eedle 5,6 near cloth, when lopping device 3 roughly was in left dead point and is progressive position, cylinder 19 actions moved in the direction of the clock billhook 16.Because the rotation of the 1st billhook 16, hook 15 crosses the top of the 3b of sheet portion of lopping device 3, moves to the front from the rear of lopping device 3.Owing to should move, as shown in Figure 3, link looper thread 10 the aperture 3e of lopping device 3 from cloth on hook 15 hooks.
Next, left and right sides pin 5,6 drops in the triangle of the line that 3b of sheet portion and eedle line 8,9 by looper thread 10, lopping device form.When descending with this eedle 5,6, the lopping device retreats from the preceding side shifting of eedle and to right-hand.Drive Sewing machines and walk half pin, become the going-back position of lopping device 3 shown in Figure 4 from the progressive position of lopping device 3 shown in Figure 3, looper thread 10 in the position, front of eedle 5 by hook 15 in conjunction with and forms the coil 10L that grows slightly.At this moment by making cylinder 19 motions.The 1st billhook 16 is counterclockwise rotated, (Fig. 5).Since the swing of the 1st billhook 16, the below of the front end of the bearing cutter 13 that hook 15 arrives, and the bound fraction that is attached to the looper thread 10 of hook 15 is cut off.When this cut off, the end of a thread 10e that remains in lopping device 3 sides was clamped by hook 15 and holddown spring 17, and the end of a thread 10f that is connected on the cloth hangs down from cloth.
Then, lopping device 3 advances mobile on one side to left from the rear side of eedle 5,6 through right dead point, gets needle thread loop 8L, the 9L that is formed by the eedle that rises through bottom dead centre Yi Bian hold with both hands with both hands.And because the driving of the drive unit that figure does not show, the 2nd billhook 28 is to the left forward travel.Thus, be set up in parallel as shown in Figure 7, move to the left side that eedle falls the place along the top of the 3b of sheet portion of lopping device 3 at the hook 26,27 of the leading section of the 2nd billhook 28.
Then, when to right-hand setback the 2nd billhook 28, link the looper thread 10 of lopping device 3 on hook 26 hooks from cloth W, link 2 needle thread loop 8L, 9L of eedle on hook 27 hooks from cloth W through the 3b of sheet portion of lopping device.As shown in Figure 8 each line by hook under the bonding state on the hook 26,27, the 2nd billhook 28 is to right-hand setback, and is in 2 needle thread loop 8L, 9L of bonding state and looper thread 10 and is cut off when arriving the 2nd bearing cutter when hook 26,27.As shown in Figure 9, the end of linking lopping device 3 that is attached to the one-tenth figure device line 10 on the hook 26 is clamped by hook 26 and holddown spring 29.
Because cut two the end of a thread 10e, 10f are discontinuous, when cloth leaves Sewing machines, the end of a thread 10e side of clamping with hook 15 and holddown spring 17 is extracted among the 9LL from the needle thread loop 8LL of sewing termination, and the end of a thread 10f intactly remains in cloth W side and is not pulled out.That is to say, be connected to residual very short of the end of a thread 10 of the looper thread on the cloth W, the end of a thread 10e side of the looper thread that has been cut off is extracted from needle thread loop 8LL, the 9LL of sewing termination.So, as long as cut the end of a thread 10f does not extract from the needle thread loop of sewing termination, the sewing terminal of cloth just can not produce the line that splits.In addition, because the end of a thread 10e that is clamped by hook 15 and holddown spring 17 can be decontroled when billhook rotates for 16 next times, remove so can consider suction device to be worth doing with line.The driving of Sewing machines half pin part and the starting of each cutter control no longer has been described in detail, and can utilize the rotation control device of known motor of sewing machine and method such as control by the signal that is located at the revolution detector on the main shaft.
As mentioned above, the method according to this invention forms stitch border afterwards with double-thread overlock sewing machine on cloth, can prevent reliably that principal vertical line unclamps from the terminal of stitch, and link the end of a thread of sewing terminal can be very short.
According to device of the present invention,, the locking and line end of the line of sewing terminal carries out simultaneously in addition because cutting off, and short to the line of sewing terminal, so after the sewing, win operation, also can obtain high-grade sewings even no longer append the end of a thread.
Claims (2)
1. a method that prevents stitch loosening comprises Sewing machines, combining mechanism and cutter; Above-mentioned Sewing machines have put on the eedle line and move up and down be at least one eedle and clamp eedle and advance and retreat swing and putting on and the common lopping device that forms the looper thread of dual chain type stitch of above-mentioned eedle line between progressive position and going-back position, above-mentioned combining mechanism is linked the looper thread of lopping device from cloth on the hook under the state of lopping device advanced position turnover; Above-mentioned cutter cuts off the eedle line coil of linking eedle from cloth through the lopping device between cloth and lopping device, meanwhile, between cloth and lopping device, cut off the looper thread of linking the lopping device from cloth, it is characterized in that, comprise following two steps: first step: under combining mechanism and state that looper thread combines, walk half pin part by driving Sewing machines, make the lopping device be in going-back position, cut off the looper thread that is hooked on the combining mechanism at its bound fraction; Second step: walk half pin part by driving Sewing machines, make the lopping device be in progressive position again, make the cutter action.
2. device that prevents stitch loosening, comprise Sewing machines, the 11st billhook and the 2nd billhook, this Sewing machines have put on the eedle line and move up and down be at least one eedle and folder toward between progressive position and going-back position, advance and retreat swing and putting on and the common lopping device of the looper thread of the dual chain type stitch of formation of above-mentioned eedle line of eedle, above-mentioned the 1st billhook is when the lopping device is in progressive position, do toward moving from the 1st bearing cutter, thereby combine with the position, whereabouts of eedle and the looper thread that is between the front end of lopping device of progressive position in the sewing machine head; Above-mentioned the 2nd billhook is behind above-mentioned the 1st billhook double action to the 1 bearing cutter, do toward moving from the 2nd bearing cutter, with link the eedle line of eedle and combine through the lopping device from cloth from the looper thread that cloth is linked the lopping device, by from then on continuing double action, cut off each bar line of this bound fraction; Make the action of the 1st billhook and the 2nd billhook behind the stitching sewing machine cloth, it is characterized in that, when the lopping device was in going-back position, the 1st billhook double action to the 1 bearing cutter cut off the looper thread of this bound fraction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP230398/97 | 1997-08-12 | ||
| JP23039897A JP3535353B2 (en) | 1997-08-12 | 1997-08-12 | Method and apparatus for preventing seam fraying |
| JP230398/1997 | 1997-08-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1208090A CN1208090A (en) | 1999-02-17 |
| CN1107756C true CN1107756C (en) | 2003-05-07 |
Family
ID=16907262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98115551A Expired - Fee Related CN1107756C (en) | 1997-08-12 | 1998-06-30 | Method and apparatus for preventing stitch from loosening |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3535353B2 (en) |
| CN (1) | CN1107756C (en) |
| TW (1) | TW365264U (en) |
Families Citing this family (10)
| 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 |
| KR20020080156A (en) * | 2001-04-12 | 2002-10-23 | 페이-룽 구 | Auxiliary Device of A Sewing Machine |
| JP4501136B2 (en) * | 2005-04-14 | 2010-07-14 | ヤマトミシン製造株式会社 | Fray prevention device for seams |
| JP5073428B2 (en) * | 2007-09-13 | 2012-11-14 | ペガサスミシン製造株式会社 | Method and apparatus for preventing fraying of seams |
| JP5618241B2 (en) * | 2010-03-11 | 2014-11-05 | ヤマトミシン製造株式会社 | Fraying prevention method and fraying prevention device for seams |
| JP5494598B2 (en) * | 2011-05-23 | 2014-05-14 | ヤマトミシン製造株式会社 | Method for preventing fraying of stitches, fraying prevention device for stitches, and stitch structure |
| JP5522577B2 (en) * | 2011-08-08 | 2014-06-18 | ヤマトミシン製造株式会社 | Double chainstitch sewing machine with seams |
| JP5885018B2 (en) | 2011-09-13 | 2016-03-15 | ヤマトミシン製造株式会社 | Fraying prevention method for double chain stitch seams and fraying prevention device for double chain stitch sewing machine |
| JP5936084B2 (en) * | 2011-09-13 | 2016-06-15 | ヤマトミシン製造株式会社 | Double chain stitch seam structure |
| JP5610405B2 (en) * | 2012-04-03 | 2014-10-22 | ヤマトミシン製造株式会社 | Fabric sewing method and double chain stitch sewing machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6233877A (en) * | 1985-08-02 | 1987-02-13 | 小松精練株式会社 | Method for imparting hydrophilicity to fiber material |
| US5333565A (en) * | 1992-10-30 | 1994-08-02 | Mim Industries, Inc. | Thread cutting via reciprocating arm with pockets and a trimming plate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3499407B2 (en) | 1997-08-12 | 2004-02-23 | ペガサスミシン製造株式会社 | Method and apparatus for preventing seam fraying |
-
1997
- 1997-08-12 JP JP23039897A patent/JP3535353B2/en not_active Expired - Fee Related
-
1998
- 1998-05-26 TW TW087208194U patent/TW365264U/en unknown
- 1998-06-30 CN CN98115551A patent/CN1107756C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6233877A (en) * | 1985-08-02 | 1987-02-13 | 小松精練株式会社 | Method for imparting hydrophilicity to fiber material |
| US5333565A (en) * | 1992-10-30 | 1994-08-02 | Mim Industries, Inc. | Thread cutting via reciprocating arm with pockets and a trimming plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1157268A (en) | 1999-03-02 |
| JP3535353B2 (en) | 2004-06-07 |
| CN1208090A (en) | 1999-02-17 |
| TW365264U (en) | 1999-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7497177B2 (en) | Seam ravel preventing apparatus and ravel preventing method | |
| CN1107756C (en) | Method and apparatus for preventing stitch from loosening | |
| CN1081251C (en) | Method and device for preventing the sewed up place being opened | |
| EP1967629B1 (en) | Sewing machine with upper thread cutting and holding mechanisms | |
| EP1967630B1 (en) | Sewing machine with upper thread cutting and holding mechanisms | |
| CN1097122C (en) | Method and apparatus for preventing stitch loosening | |
| CN1109785C (en) | Buttonhole machine | |
| US5333565A (en) | Thread cutting via reciprocating arm with pockets and a trimming plate | |
| CN1904173A (en) | Multihead birow quilting embroidering integrated machine | |
| EP0897030B1 (en) | Method and apparatus for preventing seam from raveling in double chain stitch sewing machine | |
| CN1861872A (en) | Voile dispersing mechanism for sartorius | |
| EP2845939B1 (en) | Sewing machine | |
| JPH11192393A (en) | Method for shortening sewed object side thread end of lower thread in sewing machine provided with thread cutting device | |
| CN212388184U (en) | Chain type lockstitch sewing machine | |
| JP3508371B2 (en) | Eyelet overhole sewing machine | |
| CN100359078C (en) | Automatic thread-cutting device for cylindrical sewing machine | |
| US5445091A (en) | Looper for a single-thread chainstitch sewing machine | |
| CN100507126C (en) | Double thread seam locking sewing machine | |
| CN2292822Y (en) | Automatic yarn cutting device for embroidery sewing machine | |
| JP2939809B2 (en) | Sewing machine thread cutting device | |
| US1556630A (en) | Thread-trimming device for buttonhole-sewing machines | |
| JP2877030B2 (en) | Pattern sewing machine | |
| JP2002113278A (en) | Thread-breaking device of sewing machine | |
| JPH05200179A (en) | Cutting of thread in sewing machine and its apparatus | |
| JP2583088B2 (en) | Repair method of needle thread break in multi-head sewing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1044715 Country of ref document: HK |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030507 Termination date: 20150630 |
|
| EXPY | Termination of patent right or utility model |