JPS6019277B2 - Sewing machine needle thread continuous feeding device - Google Patents
Sewing machine needle thread continuous feeding deviceInfo
- Publication number
- JPS6019277B2 JPS6019277B2 JP5581681A JP5581681A JPS6019277B2 JP S6019277 B2 JPS6019277 B2 JP S6019277B2 JP 5581681 A JP5581681 A JP 5581681A JP 5581681 A JP5581681 A JP 5581681A JP S6019277 B2 JPS6019277 B2 JP S6019277B2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- needle
- tension
- pulley
- take
- 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
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【発明の詳細な説明】
本発明は、上糸を連続的に繰り出し供V給するようにし
たミシンに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sewing machine that continuously feeds and feeds needle thread.
従来、ミシンにおいては、1縫目の縫合に必要とした長
さの上糸を、天秤により糸調子皿を介して上糸ボビンよ
り間歌的に取り出すか、または、間歌的に上糸餅繋合機
構により強制的に供給されていたので、高速総合時には
上糸の運動は不安定な状態となっていた。本発明はこの
点を改良し、常に連続的に上糸を供給するようにして、
高速縫合運転に際しての上糸供給の乱れをなくしようと
するものである。以下図面に従って説明する。Conventionally, in a sewing machine, the needle thread of the length required for sewing one stitch is taken out from the needle thread bobbin via a thread tension disc using a thread take-up, or is taken out from the needle thread bobbin in an intermittent manner. Since the needle thread was forcibly supplied by the connecting mechanism, the movement of the needle thread was unstable during high-speed operation. The present invention improves this point by constantly supplying the upper thread,
This is intended to eliminate disturbances in needle thread supply during high-speed sewing operation. This will be explained below according to the drawings.
第1図は布を2枚縫い合せる場合の断面図であるが、厚
さdの布を2枚縫い合わせる場合に必要とする上糸長さ
は、上下糸の絡み合いが2枚の布の中間で行われる良好
縫の場合、縫目ピッチをPとすれば、P+2dとなる。
ところで、天秤による上糸取上特性はそのミシン固有の
ものであって第2図イのようになっており、第2図口に
その一部を拡大して示しているように、天秤により1縫
目毎にP+幻だけ上糸が繰り出されれば第1図に示すよ
うな良好総となるものである。これについては、従来は
上糸調子皿と下糸ボビンケースの糸調子バネの圧力を調
節することにより良好縫となるように上糸張力と下糸張
力をバランスさせるか、または、上糸を天秤の降下して
いる期間にP+幻の長さだけ送り込み、糸締めのみを天
秤により行わせて良好経しようと試みられていた。これ
に対して、本発明においては、第3図に示すように、上
糸ボビン(図示せず)よりの上糸1を、糸が乱れないよ
うにするため弱い張力を与える第1テソション皿2(他
の適当なテンション袋直でよい)を介してV状の糸巻付
溝を設けたサーボモータ制御糸送りプーリ3に巻き付け
、これより送り出される側に操出糸吸収バネ4を設け、
さらにガイド5を経て下糸よりも弱い張力を与える第2
ベーステンション皿6(普通に用いられる糸調子血で押
圧バネを弱くしたものでよい)に導ぴき、これより従釆
ミシンと同様に糸取りバネ7、ガイド8、天秤9を経て
針101こ至らしめてある。Figure 1 is a cross-sectional view when sewing two pieces of cloth together, and the needle thread length required when sewing two pieces of cloth with a thickness of d is the length when the upper and lower threads are intertwined in the middle of the two pieces of cloth. In the case of good stitching, if the stitch pitch is P, it becomes P+2d.
By the way, the needle thread take-up characteristic by the thread take-up is unique to each sewing machine and is as shown in Figure 2 A. If the needle thread is let out by P + phantom for each stitch, a good overall result as shown in FIG. 1 will be obtained. Conventionally, this has been done by balancing the needle thread tension and bobbin thread tension by adjusting the pressure of the needle thread tension disc and the thread tension spring in the bobbin case, or by adjusting the pressure of the needle thread tension spring in the needle thread tension disc and the lower thread bobbin case. Attempts were made to feed the length of P + phantom during the period when the thread was descending, and to have the thread tightened only using a thread take-up to ensure good results. On the other hand, in the present invention, as shown in FIG. 3, a first tension plate 2 applies a weak tension to the upper thread 1 from the upper thread bobbin (not shown) to prevent the thread from being disturbed. The yarn is wound around a servo motor controlled yarn feed pulley 3 provided with a V-shaped yarn winding groove through a tension bag (another suitable tension bag may be used), and a discharged yarn absorption spring 4 is provided on the side from which the yarn is fed out.
Furthermore, the second thread passes through the guide 5 and applies a tension weaker than that of the bobbin thread.
The thread is guided to the base tension plate 6 (a commonly used thread tension plate with a weakened pressure spring may be used), and from this it passes through the thread take-up spring 7, guide 8, and thread take-up lever 9, and connects it to the needle 101, as in the case of a secondary sewing machine. be.
本発明による上糸供V給装直は上記のように構成されて
いるので、上糸は、連続回転しているサ−ボモータ制御
糸送りプーリ3により1縫目毎にP+幻の割合で糸送り
プーリ3と第2ベーステンション皿6に供給される。Since the needle thread supply V direct feeder according to the present invention is configured as described above, the needle thread is fed at a rate of P+phantom for each stitch by the continuously rotating servo motor controlled thread feed pulley 3. It is supplied to the feed pulley 3 and the second base tension plate 6.
その区間中の糸の弛みは操出糸吸収バネ4により吸収さ
れるので、糸の乱れは生じない。さらに、下糸と交絡し
た上糸は、下糸の張力が上糸張力よりも大きいので、天
秤9が上昇途中において下吊縫状態にあるが、天秤の上
死点こ近づくに従って第2ベーステンション皿6より上
糸を取り出すようになり、上死点に至るまでに糸送りプ
ーリ3と第2ベーステンション皿6との間に操出糸吸収
バネで蓄えられたP+幻の長さの糸を天秤9が取り出す
ことになる。なお、天秤9がP十幻以上糸を取り出そう
としても、糸送りプーリ3はサーボモータ制御となって
いるので、糸送りプーリ3は天秤の上糸引出作用によっ
てもその回転に変化が生ぜず、P+がしか線出すことが
できない。即ち、下糸張力が上糸張力より大きいので、
上糸と下糸の交路力により上糸はp+がだけは繰り出さ
れることになる。したがって、上糸は1縫目毎にP十幻
の長さだけ常に確実に供給されることになり、第1図示
のような良好縫が行われる。本発明をミシンに用いた場
合の制御系が第4図にブロック図として示されている。Since the slack of the yarn in this section is absorbed by the yarn absorption spring 4, no disturbance of the yarn occurs. Furthermore, since the tension of the upper thread intertwined with the lower thread is greater than the upper thread tension, the thread take-up 9 is in a hanging sewing state on the way up, but as the thread take-up approaches the top dead center, the second base tension increases. The upper thread is taken out from the disc 6, and by the time it reaches the top dead center, the thread of P + phantom length stored between the thread feed pulley 3 and the second base tension disc 6 by the thread absorption spring is removed. The balance 9 will be taken out. Furthermore, even if the thread take-up 9 attempts to take out a thread of P or more, since the thread feed pulley 3 is controlled by a servo motor, the rotation of the thread feed pulley 3 will not change even if the thread take-up action of the thread take-up takes place. , P+ can only produce lines. That is, since the lower thread tension is greater than the upper thread tension,
Due to the crossing force between the upper thread and the lower thread, only the p+ thread of the upper thread is let out. Therefore, the upper thread is always reliably supplied by the length P for each stitch, and a good stitch as shown in the first figure is performed. A control system when the present invention is applied to a sewing machine is shown as a block diagram in FIG.
即ち、縫合される布厚(幻)を布押え様の上下変動を利
用して検知し、さらに布送りピッチpとミシン縫速度を
感知してコンピュータにメモリ‐し、これより糸線出量
を算出してサーボモータ回転指令を発し、サーボモータ
制御糸ミ去りプーリ3の回転を制御して1縫目毎にP+
幻の長さの上糸を繰り出させるようにする。なお、布厚
を2dとして説明したが、上下縫合布の厚さが異なる場
合でも上下縫合布の中間に上下糸の交総点があれば良好
縫となるのであるから、同じ布厚の場合の縫合について
説明した時と同機に布厚を検出すればよい。また、第2
ベーステンション皿6の役副ま、天秤9による糸裸出作
用が行われない期間中上糸を保持し、かつ、天秤の上死
点近くになって上糸繰出作用が行われる時にその作用の
妨げにならない程度の弱い保持力で保持していて、サー
ボモータ制御糸送りプーリ3により連続的に繰り出され
る上糸を糸送りプーリ3と第2ベーステンション間に操
出糸吸収バネで蓄えておけばよいものであるので、第2
ベーステンション皿6の代りに電磁石により上糸の把持
、解放を行う2枚の血を備えた電磁石制御上糸把持器を
用い、第2図口に示すt,.の時期に上糸把持を解放す
るようにしてもよい。That is, the thickness of the fabric to be sewn (phantom) is detected using the vertical fluctuation of the presser foot, and the fabric feed pitch p and sewing speed of the sewing machine are also sensed and stored in the computer, and the thread line output amount is calculated from this. , issues a servo motor rotation command, controls the rotation of the servo motor-controlled thread removal pulley 3, and controls P+ for each stitch.
Make sure to let out the needle thread to the desired length. Although the explanation was given assuming that the fabric thickness is 2d, even if the thickness of the upper and lower sewn fabrics is different, if the intersection point of the upper and lower threads is in the middle of the upper and lower sewn fabrics, the stitching will be good. The fabric thickness can be detected using the same machine as when we explained about stitching. Also, the second
The function of the base tension plate 6 is to hold the upper thread during the period when the thread take-up action is not performed by the thread take-up lever 9, and to hold the upper thread during the period when the thread take-up action is not performed by the thread take-up thread take-up, and to hold the upper thread during the period when the thread take-up action is not performed by the thread take-up thread take-up lever. The upper thread is held with a weak holding force that does not interfere, and the upper thread is continuously paid out by the servo motor controlled thread feed pulley 3, and the upper thread is stored between the thread feed pulley 3 and the second base tension by the thread absorption spring. Since it is a good thing, the second
In place of the base tension plate 6, an electromagnetically controlled needle thread gripper equipped with two plates for gripping and releasing the needle thread using electromagnets is used. The upper thread grip may be released at this time.
こうすれば、糸送りプーリ3により連続的に送り出され
る上糸は該上糸把持器と糸送りプーリ3との間で篭わえ
られ、天秤9による−縫目に使用したP十幻の長さの糸
を繰り出す作用を開始する時期りこ電磁石制御上糸把持
器による上糸把持を解放するので、操出糸吸収バネ4に
より蓄えられた上糸の繰り出しを天秤9に行わせること
ができる。なお、前記上糸把持器により、天秤の上糸線
出し期間終了後より前記時期らまでの間上糸を強く把持
しておけば、その期間中は針側の上糸に生ずる張力変動
による影響を受けることなく糸送りプーリ3と上糸把持
器(ベーステンション皿6)との間に1縫目に必要とす
る縫糸長さを確実に送り込むことができ、また、天秤に
よる上糸線出しの際には上糸把持を解放することにより
上糸に殆ど張力を与えることなく繰り出しを行わせるこ
とができる。In this way, the needle thread that is continuously fed out by the thread feed pulley 3 is held between the needle thread gripper and the thread feed pulley 3, and the length of P used for the stitch is determined by the thread take-up 9. Since the upper thread grip by the riko electromagnet-controlled needle thread gripper is released at the time of starting the action of paying out the thread, the thread take-up 9 can be caused to pay out the needle thread stored by the thread absorbing spring 4. Note that if the needle thread gripper is used to firmly grasp the needle thread from the end of the thread take-up period to the above-mentioned period, the influence of tension fluctuations occurring on the needle thread on the needle side will be reduced during that period. The length of sewing thread required for one stitch can be reliably fed between the thread feed pulley 3 and the upper thread gripper (base tension plate 6) without being hit by the needle thread thread take-up. In some cases, by releasing the upper thread grip, the upper thread can be let out without applying much tension to the upper thread.
以上説明したように、本発明によれば、連続回転してい
るサ−ボ制御糸送りプーリにより上糸は必要量だけ連続
的に供給され、天秤は糸締作用を行うだけで良好縫がで
き、また、上糸の供給、停止が繰返し行われる形式の上
糸供聯合装置を備えた従来のミシンと比べ、慣性変化が
ないので、上糸の繰出供給が高速運転時においても円滑
正確に行われ、しかも従来ミシンにおけるような糸調子
血のバネ圧力調整を不用としたので、常に良好経を確実
に行うことができる。As explained above, according to the present invention, the necessary amount of upper thread is continuously supplied by the continuously rotating servo-controlled thread feed pulley, and the thread take-up only performs a thread tightening action to achieve good sewing. In addition, compared to conventional sewing machines equipped with a needle thread supplying device that repeatedly supplies and stops the needle thread, there is no inertia change, so the needle thread can be fed and fed smoothly and accurately even during high-speed operation. Furthermore, since there is no need to adjust the spring pressure of the thread tension as in conventional sewing machines, it is possible to always ensure good warping.
第1図は布を2枚縫い合わせる場合の断面説明図、第2
図イは天秤による糸取上特性を示す線図、同口はその一
部拡大図、第3図は本発明による上糸連続供給装置を備
えたミシン頭部の一部を示す説明図、第4図は本発明装
置の作動を示すブロック図、である。
1・・・上糸、2・・・第1ベーステンション装置、3
・・・サーボモータ制御糸送りプーリ、4・・・操出糸
吸収バネ、5…ガイド、6…第2ベーステンション装置
または上糸把持解放器、7・・・糸取りバネ、8・・・
ガイド、9・・・天秤、10…針。
第’図
第2図
第3図
第4図Figure 1 is a cross-sectional diagram when sewing two pieces of cloth together;
Figure A is a diagram showing the thread take-up characteristics of the thread take-up; Figure 3 is a partially enlarged view; FIG. 4 is a block diagram showing the operation of the device of the present invention. 1... Upper thread, 2... First base tension device, 3
. . . Servo motor controlled yarn feed pulley, 4. Throw-off yarn absorption spring, 5. Guide, 6. Second base tension device or upper thread gripping release device, 7. Thread take-up spring, 8.
Guide, 9... Balance, 10... Needle. Figure 'Figure 2 Figure 3 Figure 4
Claims (1)
ン装置と天秤との間に、連続回転するサーボモータ制御
上糸繰出プーリ、繰出糸吸収バネ、および、糸を一時的
に保持するための第2ベーステンシヨン装置または上糸
把持解放器を設け、1縫目に必要とする上糸繰出は前記
繰出プーリにより連続して行わせ、糸締を天秤により行
わせるようにしてなる、ミシン上糸連続供給装置。 2 上糸に弱い張力を与えるための第1ベーステンシヨ
ン装置と下糸より弱い張力を与える第2テンシヨン装置
との間に、連続回転するサーボモータ制御上糸繰出プー
リと繰出糸吸収バネを設け、上糸繰出プーリによりミシ
ン縫合に必要とする量の上糸を連続して供給するように
してなる、特許請求の範囲第1項記載のミシン上糸連続
供給装置。 3 上糸に弱い張力を与えるためのベースデンシヨン装
置と、天秤より上糸供給側に設けた上糸を把持、解放す
る上糸把持解放器との間に、連続回転するサーボモータ
制御上糸繰出プーリと繰出糸吸収バネを設け、上糸繰出
プーリによりミシン縫合に必要とする量の上糸を連続し
て供給し、天秤による糸繰出作用の開始時期に前記上糸
把持解放器による上糸の把持を解放して、上糸繰出プー
リと上糸把持解放器の間に蓄えられた1縫目に必要とす
る縫糸を供給するようにしてなる、特許請求の範囲第1
項記載のミシン上糸連続供給装置。[Scope of Claims] 1. Between a first base tension device for applying a weak tension to the needle thread and a thread take-up, a continuously rotating servo motor-controlled needle thread pay-out pulley, a pay-out thread absorption spring, and a thread temporarily A second base tension device or an upper thread gripping/releasing device is provided for holding the thread in place, and the upper thread required for the first stitch is continuously fed out by the feeding pulley, and the thread tightening is performed by a thread take-up. Continuous needle thread feeding device for sewing machines. 2. A continuously rotating servo motor-controlled needle thread pay-out pulley and a pay-out thread absorption spring are provided between the first base tension device for applying a weak tension to the upper thread and the second tension device for providing a tension weaker than the bobbin thread. 2. The continuous sewing machine needle thread supply device according to claim 1, wherein the needle thread feeding pulley continuously supplies needle thread in an amount necessary for sewing with the sewing machine. 3 A continuously rotating servo motor-controlled upper thread is connected between a base tension device for applying weak tension to the upper thread and an upper thread gripping and releasing device for gripping and releasing the upper thread, which is installed on the upper thread supply side of the thread take-up. A feed-out pulley and a feed-out thread absorption spring are provided, and the needle thread feed pulley continuously supplies the amount of needle thread required for sewing by the sewing machine, and the needle thread is released by the needle thread gripping and releasing device at the time when the thread take-up starts to be fed out by the thread take-up. Claim 1: Releases the grip of the upper thread, and supplies the sewing thread required for one stitch stored between the upper thread payout pulley and the upper thread grip releaser.
Sewing machine upper thread continuous feeding device as described in .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5581681A JPS6019277B2 (en) | 1981-04-14 | 1981-04-14 | Sewing machine needle thread continuous feeding device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5581681A JPS6019277B2 (en) | 1981-04-14 | 1981-04-14 | Sewing machine needle thread continuous feeding device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57170289A JPS57170289A (en) | 1982-10-20 |
JPS6019277B2 true JPS6019277B2 (en) | 1985-05-15 |
Family
ID=13009457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5581681A Expired JPS6019277B2 (en) | 1981-04-14 | 1981-04-14 | Sewing machine needle thread continuous feeding device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6019277B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60176784U (en) * | 1984-04-28 | 1985-11-22 | ジューキ株式会社 | Sewing machine needle thread supply device |
JPS63107684U (en) * | 1986-12-27 | 1988-07-11 |
-
1981
- 1981-04-14 JP JP5581681A patent/JPS6019277B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS57170289A (en) | 1982-10-20 |
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