JPH11244565A - Thread tension regulator for sewing machine - Google Patents
Thread tension regulator for sewing machineInfo
- Publication number
- JPH11244565A JPH11244565A JP5361498A JP5361498A JPH11244565A JP H11244565 A JPH11244565 A JP H11244565A JP 5361498 A JP5361498 A JP 5361498A JP 5361498 A JP5361498 A JP 5361498A JP H11244565 A JPH11244565 A JP H11244565A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- tension
- tensioner
- state
- sewing
- 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.)
- Granted
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、上糸に張力を付
与して糸張力を調整するミシンの糸張子装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread tensioner device for a sewing machine for adjusting the thread tension by applying tension to an upper thread.
【０００２】[0002]
【従来の技術】図７は、自動糸切り装置を備えた従来の
ミシンの頭部を示した正面図である。一般的なミシンに
おいて、糸巻き２に巻かれている上糸３は副糸調子器
（第一糸調子器）Ｐ４、主糸調子器（第二糸調子器）
５、糸取りバネ６、糸案内Ａ７、天秤８、糸案内Ｂ９、
針棒糸掛け１１、針１２を経て布１４に到達し、下糸１
７と協同して縫目を形成する。下糸１７は釜１５に納め
られたボビンケース１６より布１４上の縫目へとつなが
っている。2. Description of the Related Art FIG. 7 is a front view showing a head of a conventional sewing machine provided with an automatic thread cutting device. In a general sewing machine, the upper thread 3 wound on the bobbin 2 has a sub-tensioner (first thread tensioner) P4 and a main thread tensioner (second thread tensioner).
5, thread take-up spring 6, thread guide A7, balance 8, thread guide B9,
After reaching the cloth 14 via the needle bar thread hook 11 and the needle 12, the lower thread 1
Form a seam in cooperation with 7. The lower thread 17 is connected to a seam on the cloth 14 from a bobbin case 16 accommodated in a shuttle 15.
【０００３】工業用ミシンには、一般に、縫製終了時に
針板１３下で上糸と下糸とを切断する自動糸切り装置が
設けられ、動メス１８および固定メス１９が、縫製終了
時の糸切り信号に伴って動作し、布１４から針１２の間
の上糸３とボビンケース１６から布１４の間の下糸１７
を切断する。In general, an industrial sewing machine is provided with an automatic thread trimmer which cuts an upper thread and a lower thread under the needle plate 13 at the end of sewing. It operates according to the cutting signal, and the upper thread 3 between the cloth 14 and the needle 12 and the lower thread 17 between the bobbin case 16 and the cloth 14
Disconnect.
【０００４】図８に糸切断時の動メス１８と固定メス１
９の詳細を示す。同図（ａ）〜（ｃ）はミシン糸の切断
処理の流れを説明するため針付近を側方から眺めた断面
図、同図（ａ’）は（ａ）の動メス１８と固定メス１９
とを上方から眺めた上面図である。また、同図（ａ）と
（ａ’）は糸を切断する瞬間の動メス１８、固定メス１
９および上糸下糸の位置関係を示している。FIG. 8 shows a moving knife 18 and a fixed knife 1 at the time of thread cutting.
9 is shown below. 6A to 6C are cross-sectional views of the vicinity of the needle viewed from the side for explaining the flow of the sewing thread cutting process, and FIG. 6A is a moving knife 18 and a fixed knife 19 of FIG.
FIG. 4 is a top view of the device viewed from above. FIGS. 3A and 3A show the moving knife 18 and the fixed knife 1 at the moment when the thread is cut.
9 shows the positional relationship between the upper thread 9 and the lower thread.
【０００５】動メス１８は動作時、往路（Ａ方向）にて
先端１８ａが上糸３の針側３ｂと布側３ａの間のたるみ
によって生じた輪上の部分をくぐり、フック形状部１８
ｃに上糸３を引っかけ、同時に下糸１７も引っかける。
動メス１８の刃部１８ｄよりフック形状部１８ｃの間は
凹形状１８ｂとなっており、固定メス１９とその間の糸
との干渉を防いでいる。動メス１８の復路（Ｂ方向）に
て、フック形状部１８ｃが上糸３、下糸１７をそれぞれ
糸巻き２、ボビンケース１６より引き出しながら、固定
メス１９に近づき、動メス１８の刃部１８ｄと固定メス
の刃部１９ａが噛み合うことで糸を切断する。When the moving knife 18 is operated, the tip 18a of the moving knife 18 passes through a portion on the ring caused by slack between the needle side 3b and the cloth side 3a of the upper thread 3 in the outward path (direction A), and the hook-shaped portion 18
The upper thread 3 is hooked on c, and the lower thread 17 is hooked at the same time.
A concave portion 18b is formed between the blade portion 18d of the moving knife 18 and the hook-shaped portion 18c to prevent interference between the fixed knife 19 and the yarn therebetween. On the return path (B direction) of the moving knife 18, the hook-shaped portion 18 c approaches the fixed knife 19 while pulling out the upper thread 3 and the lower thread 17 from the bobbin case 16 and the bobbin case 16, respectively. The thread is cut by engaging the blade portion 19a of the fixed knife.
【０００６】図８（ｂ）は切断後の糸の状態を示す図で
ある。ここで針１２より切断部までの上糸を針糸３ｂと
呼ぶ。図８（ｃ）は、糸切り動作終了後、ミシンが停止
した時の上糸の状態を示す図である。糸切り後、ミシン
が停止するまでの間に天秤８が上糸３を引き戻し、最終
的な針糸３ｂが針先に残る。最終的に残った針糸３ｂの
針１２からの長さを針糸残り長さＬと呼ぶ。FIG. 8B is a diagram showing the state of the yarn after cutting. Here, the upper thread from the needle 12 to the cutting portion is referred to as a needle thread 3b. FIG. 8C is a diagram illustrating a state of the upper thread when the sewing machine stops after the end of the thread cutting operation. After thread trimming, the balance 8 pulls back the upper thread 3 until the sewing machine stops, and the final needle thread 3b remains at the needle tip. The length of the finally remaining needle thread 3b from the needle 12 is referred to as a remaining needle thread length L.
【０００７】この針糸残り長さＬが短いと、次回縫製開
始時に針から糸が抜けてしまったり、目飛びが生じて縫
目が形成されなかったりという問題を生じさせる。一
方、針糸残り長さＬが長すぎると、次の縫目形成時に長
い上糸が絡み合って縫い上り外観をそこなうこととな
る。また、針糸残り長さＬが短いにせよ長いにせよ、糸
切り後に、上糸クランプ装置を使用する場合、該装置に
よる針糸の把持処理の成功率に大きく影響を与えてしま
う。ここで、上糸クランプ装置とは、糸切断処理後に針
先の糸を把持し、次の縫製時に針先の糸を所定の長さで
所定の位置に配置するための装置である。[0007] If the remaining length L of the needle thread is short, the thread may come off from the needle at the start of the next sewing, or a stitch may not be formed due to skipping. On the other hand, if the remaining length L of the needle thread is too long, a long upper thread will be entangled at the time of forming the next stitch, which will disturb the appearance after sewing. In addition, when the upper thread clamp device is used after the thread trimming, whether the remaining length L of the needle thread is short or long, it greatly affects the success rate of the gripping process of the needle thread by the device. Here, the upper thread clamp device is a device for grasping the thread at the needle point after the thread cutting process and arranging the thread at the needle point at a predetermined length and a predetermined position at the next sewing.
【０００８】針糸残り長さＬを決定しているのは、単純
には針１２から動メス１８と固定メス１９が噛合う位置
までの上糸３の糸経路長ということになる。実際には動
メス１８のフック形状部１８ｃにて、屈曲させている分
で長さをかせいでいる。更に、糸切り動作の中では動メ
ス１８のフック形状部１８ｃにて糸を強く引き出すこと
で、糸の慣性力により余分に糸が引き出され、更に針糸
残り長さＬを長くすることが可能になっている。The reason for determining the remaining length L of the needle thread is simply the thread path length of the upper thread 3 from the needle 12 to the position where the moving knife 18 and the fixed knife 19 mesh. Actually, the length is increased by the amount of bending at the hook-shaped portion 18c of the moving knife 18. Further, during the thread cutting operation, the thread is pulled out strongly by the hook-shaped portion 18c of the moving knife 18, so that extra thread is pulled out by the inertia force of the thread, and the remaining length L of the needle thread can be further increased. It has become.
【０００９】動メス１８の引き出しによる糸の慣性力を
利用するため、図９に示すように、糸調子器５の糸緩め
ピン３８をアクチュエータ等によって糸切り時に作動さ
せて、回転プーリ５ａにかかるバネ圧を解放することを
行っている。そして、上糸３の引き出し量をコントロー
ルするために、上記縫製用のロータリ糸調子器５とは別
に、糸切り時に上糸へ微妙な摩擦抵抗を与えるための副
糸調子器Ｐ４が設けられている。As shown in FIG. 9, in order to use the inertia force of the thread by pulling out the moving knife 18, the thread release pin 38 of the thread tensioner 5 is actuated at the time of thread cutting by an actuator or the like, and is applied to the rotary pulley 5a. It is going to release the spring pressure. In order to control the amount of pulling out of the upper thread 3, apart from the rotary thread tensioner 5 for sewing, an auxiliary thread tensioner P4 for giving a delicate frictional resistance to the upper thread at the time of thread trimming is provided. I have.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、薄物や
柔らかい布などを縫製する際、ロータリ糸調子器５によ
り上糸に与えられる抵抗（張力）が非常に軽妙である場
合には、副糸調子器Ｐ４による抵抗（張力）も縫製時に
無視できなくなってくるので、副糸調子器Ｐ４の調整を
縫製時の張力を優先させて行う必要が出てくる。また、
ロータリ糸調子器５としてロータリ式糸調子を使用する
場合には、ロータリ式糸調子器が上流側で予め糸を張っ
た状態にする必要があるため、副糸調子器Ｐ４の調整を
ロータリ式糸調子器に合わせて行う必要が出てくる。こ
の調整がロータリ式糸調子器に適合しないと、縫製時の
張力が狂ってしまい適正な縫目形成ができなくなる。However, when sewing a thin or soft cloth, if the resistance (tension) given to the upper thread by the rotary thread tensioner 5 is very light, the auxiliary thread tensioner is used. Since the resistance (tension) due to P4 cannot be neglected at the time of sewing, it is necessary to adjust the auxiliary thread tensioner P4 by giving priority to the tension at the time of sewing. Also,
When a rotary thread tensioner is used as the rotary thread tensioner 5, the rotary thread tensioner needs to be pre-tensioned on the upstream side. It is necessary to do it according to the tone device. If this adjustment is not suitable for the rotary thread tensioner, the tension at the time of sewing will be incorrect, and proper stitch formation will not be possible.
【００１１】上記のように、副糸調子器Ｐ４による抵抗
（張力）を、縫製時の張力を優先させて調整したり、主
糸調子器に合せて調整すると、自動糸切り装置による糸
切断時の張力が適切な値からずれてしまい、必要な針糸
残り長さが得られなかったり、針糸残り長さがばらつい
て安定しないという問題を発生させることがあった。ま
た、逆に、針糸残り長さ安定させるために、糸切断処理
時の張力を優先させて副糸調子器の調整を行うと、上述
のように、薄物や柔らかい布を低張力で縫製する場合
に、縫製時の張力が適正なものからずれてしまい、縫目
の仕上りがきたなくなってしまうという問題を発生させ
ることがあった。As described above, when the resistance (tension) by the auxiliary thread tensioner P4 is adjusted by giving priority to the tension at the time of sewing, or adjusted according to the main thread tensioner, when the thread is cut by the automatic thread trimmer, In some cases, the tension of the needle thread deviates from an appropriate value, and a required remaining length of the needle thread cannot be obtained, or the remaining length of the needle thread varies, thereby causing problems such as instability. Conversely, in order to stabilize the remaining length of the needle thread, if the adjustment of the auxiliary thread tensioner is performed by giving priority to the tension at the time of the thread cutting process, as described above, a thin material or a soft cloth is sewn with a low tension. In such a case, the tension at the time of sewing may be deviated from an appropriate one, and a problem may occur in that the finish of the stitch becomes unsatisfactory.
【００１２】この発明は、上記実状に鑑みてなされたも
ので、薄物や柔らかい布を低張力で縫製する場合でも、
縫製時の糸張力を適正なものとして仕上りの美しい縫製
を行うことが出来ると共に、糸切断処理時の糸張力も適
正なものとして糸切断後の糸残り長さも適宜安定した長
さを得ることの出来るミシンの糸調子装置を提供するこ
とを目的としている。[0012] The present invention has been made in view of the above-mentioned circumstances, and even when sewing a thin or soft cloth with low tension,
It is possible to perform sewing with a beautiful finish by setting the thread tension at the time of sewing to be appropriate, and to obtain the appropriate thread tension at the time of thread cutting processing and to obtain a suitably stable length of the remaining thread after thread cutting. An object of the present invention is to provide a thread tension device for a sewing machine that can be used.
【００１３】[0013]
【課題を解決するための手段】上記課題を解決するた
め、請求項１記載の発明は、上糸に張力を付与して縫製
時の糸張力を調整する主糸調子器と、該主糸調子器と異
なる箇所で上糸に副張力を付与可能な副糸調子器と、任
意のタイミングで前記主糸調子器による張力付与を解除
可能な張力解除手段と、任意のタイミングで前記副糸調
子器の状態を張力付与解除の状態から張力付与の状態に
切り換え可能な切換手段とを備えたミシンの糸調子装置
とした。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a main thread tensioner for adjusting the thread tension during sewing by applying tension to the upper thread, and the main thread tensioner. An auxiliary thread tensioner capable of applying an auxiliary tension to the upper thread at a location different from the yarn tensioner; a tension release means capable of releasing the tension applied by the main thread tensioner at an arbitrary timing; and the auxiliary thread tensioner at an arbitrary timing. And a switching means capable of switching the state from the state where tension is released to the state where tension is applied.
【００１４】この請求項１記載の発明によれば、縫製時
の糸張力を調整する主糸調子器として、プリテンション
（予め上流側で付与される弱い張力）を必要としない糸
調子器（例えば調子皿等）を使用した場合に、縫製時の
糸張力と糸切断処理時の糸張力との何れに対しても適切
な張力を付与することが出来る。即ち、主糸調子器によ
る張力を縫製時に合せて調整すると共に、副糸調子器に
よる張力を糸切断処理時に合せて調整しておく一方、縫
製時に上記張力解除手段と切換手段とを非作用にすると
共に、糸切断処理時に上記張力解除手段と切換手段とを
作用させることで、主糸調子器が縫製時に、副糸調子器
が糸切断処理時に、それぞれ独立的に作用するので、縫
製時と糸切断処理時との糸張力を両者とも適切なものに
することが出来る。従って、例えば薄物や柔らかい布を
低張力で縫製する場合であっても、縫製時の糸張力を適
切なものとして仕上りの美しい縫製を行うことが出来る
と共に、糸切断処理時の糸張力も適切なものにして針先
の糸残り長さを安定させることが出来る。According to the first aspect of the present invention, as a main thread tensioner for adjusting the thread tension at the time of sewing, a thread tensioner (for example, a thread tensioner that does not require a pretension (a weak tension applied in advance on the upstream side)) is used. In the case where a tone plate or the like is used, appropriate tension can be applied to both the thread tension during sewing and the thread tension during thread cutting processing. That is, the tension of the main thread tensioner is adjusted according to the time of sewing, and the tension of the auxiliary thread tensioner is adjusted according to the time of the thread cutting process, while the tension releasing means and the switching means are disabled during sewing. At the same time, by operating the tension releasing means and the switching means at the time of the thread cutting process, the main thread tensioner operates independently at the time of sewing, and the sub thread tensioner operates independently at the time of the thread cutting process. Both can make the thread tension at the time of the thread cutting process appropriate. Therefore, for example, even when sewing a thin or soft cloth with a low tension, the thread tension at the time of sewing can be set to an appropriate value and a beautifully finished sewing can be performed. The stitch length of the needle tip can be stabilized.
【００１５】具体的には、糸調子器による張力付与を解
除する構成は、例えば、糸を挟んで押圧する糸調子皿の
間に作動片を押し込み糸調子皿の間を押し広げて糸の押
圧を解除する構成や、糸調子器の外側の調子皿をミシン
フレーム内から押し返して調子皿の間を押し開ける構成
など、種々の構成により実現可能である。また、上記張
力解除手段と切換手段との作動は、例えば、制御回路等
の制御により糸切断処理のタイミングに合わせて行うよ
うにしても良いし、その他、作業者の操作により糸切断
処理のタイミングに合わせて行うことも可能である。ま
た、その駆動力はソレノイドやエアーピストンなどを利
用した電気的な力の他、レバーやペダルを介した作業者
のマニュアル駆動を利用しても良い。More specifically, the structure for releasing the tension application by the thread tensioner is, for example, that the operating piece is pushed between thread tension plates which sandwich and presses the thread, and the gap between the thread tension plates is pushed open to push the thread. And a configuration in which the tension plate outside the thread tensioner is pushed back from within the sewing machine frame and the space between the tension plates is pushed open. Further, the operation of the tension releasing means and the switching means may be performed in accordance with the timing of the thread cutting process under the control of a control circuit or the like, or the timing of the thread cutting process may be controlled by an operator. It is also possible to carry out according to. The driving force may be electric power using a solenoid, an air piston, or the like, or manual driving of an operator via a lever or a pedal.
【００１６】請求項２記載の発明は、張力付与のために
予め上流側で上糸に弱い張力を必要とすると共に、この
上糸に張力を付与して縫製時の糸張力を調整する主糸調
子器と、該主糸調子器の上流側で上糸に第１張力を付与
可能な第１の副糸調子器および第２張力を付与可能な第
２の副糸調子器と、任意のタイミングで前記主糸調子器
による張力付与を解除可能な張力解除手段と、任意のタ
イミングで前記第１の副糸調子器の状態を張力付与の状
態から張力付与解除の状態に切り換えると共に、前記第
２の副糸調子器の状態を張力付与解除の状態から張力付
与の状態に切り換え可能な切換手段とを備えたミシンの
糸調子装置とした。According to a second aspect of the present invention, the upper thread requires a weak tension on the upstream side in advance to apply the tension, and the main thread is applied with the tension to adjust the thread tension during sewing. A tensioner, a first sub-thread tensioner capable of applying a first tension to the upper thread upstream of the main thread tensioner, and a second sub-thread tensioner capable of applying a second tension to the upper thread, at an arbitrary timing A tension releasing means capable of releasing the tension application by the main thread tensioner, and switching the state of the first auxiliary thread tensioner from the tension application state to the tension application release state at an arbitrary timing; And a switching means capable of switching the state of the auxiliary thread tensioner from the state where tension is released to the state where tension is applied.
【００１７】この請求項２記載の発明によれば、縫製時
の糸張力を調整する主糸調子器として、プリテンション
（予め上流側で付与される弱い張力）を必要とする糸調
子器（例えばロータリ糸調子器等）を使用した場合に、
縫製時の糸張力と糸切断処理時の糸張力との何れに対し
ても適切な張力を付与することが出来る。即ち、主糸調
子器と第１の副糸調子器による張力を縫製時に合せて調
整すると共に、第２の副糸調子器による張力を糸切断処
理時に合せて調整しておく一方、縫製時に上記張力解除
手段と切換手段とを非作用とし、糸切断処理時に上記張
力解除手段と切換手段とを作用させることで、縫製時に
主糸調子器および第１の副糸調子器が、糸切断処理時に
第２の副糸調子器が、それぞれ独立的に作用するので、
縫製時と糸切断処理時との糸張力を両者とも適切なもの
にすることが出来る。従って、例えば薄物や柔らかい布
を低張力で縫製する場合であっても、縫製時の糸張力を
適切なものとして仕上りの美しい縫製を行うことが出来
ると共に、糸切断処理時の糸張力も適切なものにして針
先の糸残り長さを安定させることが出来る。According to the second aspect of the present invention, as a main thread tensioner for adjusting the thread tension during sewing, a thread tensioner (for example, a thread tensioner that requires a pretension (a weak tension previously applied on the upstream side)) is required. When using a rotary thread tensioner)
Appropriate tension can be applied to both the thread tension during sewing and the thread tension during thread cutting processing. That is, while adjusting the tension by the main thread tensioner and the first sub-thread tensioner at the time of sewing, and adjusting the tension by the second sub-thread tensioner at the time of the thread cutting process, the tension is adjusted at the time of sewing. The tension release means and the switching means are deactivated, and the tension release means and the switching means are operated during the thread cutting process, so that the main thread tensioner and the first sub-thread tensioner at the time of sewing can be operated during the thread cutting process. Since the second auxiliary thread tensioners operate independently,
Both the thread tension at the time of sewing and the thread tension at the time of thread cutting processing can be made appropriate. Therefore, for example, even when sewing a thin or soft cloth with a low tension, the thread tension at the time of sewing can be set to an appropriate value and a beautifully finished sewing can be performed. The stitch length of the needle tip can be stabilized.
【００１８】ここで、張力付与のために予め上流側で上
糸に弱い張力を必要とする主糸調子器は、例えば、ロー
タリ糸調子器であるが、その他、糸暴れを嫌う調子皿な
どからなる糸調子器も含まれる。糸調子器の張力付与を
解除する構成や、張力解除手段および切換手段を作動さ
せる構成などは、請求項１記載の発明で説明した種々の
構成があり得る。Here, the main thread tensioner which needs a weak tension on the upper thread in advance on the upstream side to apply the tension is, for example, a rotary thread tensioner. Also included is a thread tensioner. The configuration for releasing the tension application of the thread tensioner, the configuration for operating the tension release unit and the switching unit, and the like can be various configurations described in the first aspect of the invention.
【００１９】請求項３記載の発明は、請求項２記載のミ
シンの糸調子装置において、前記切換手段が、第１方向
に往復動することで前記第１の副糸調子器の状態を張力
付与の状態と張力付与解除の状態との間で切り換える第
１作動部と、第２方向に往復動することで前記第２の副
糸調子器の状態を張力付与の状態と張力付与解除の状態
との間で切り換える第２作動部と、可動部を有し該可動
部を往復駆動可能な駆動手段と、前記可動部の往復動を
伝達して、前記第１作動部を前記第１方向に往復動させ
ると共に前記第２作動部を前記第２方向と逆に往復動さ
せるリンクとを備えた構成とした。According to a third aspect of the present invention, in the thread tension device for a sewing machine according to the second aspect, the switching means reciprocates in a first direction to apply tension to the state of the first auxiliary thread tensioner. And a first operating unit that switches between the state of the tension application and the state of the tension release, and the state of the second sub-thread tensioner by reciprocating in the second direction. And a driving means having a movable part and capable of reciprocally driving the movable part, and transmitting reciprocating motion of the movable part to reciprocate the first operating part in the first direction. And a link for reciprocating the second operating portion in the opposite direction to the second direction.
【００２０】この請求項３記載の発明によれば、駆動手
段の可動部の往復動のみで、第１の副糸調子器の作用／
非作用の切換と、第２の副糸調子器の非作用／作用の切
換との両方が遂行され、即ち、２個の機器の動作を上記
１個の可動部の運動で制御できるので、切換手段を作動
させるタイミング制御を容易にすることが出来る。According to the third aspect of the present invention, only the reciprocating motion of the movable portion of the driving means is used to operate the first auxiliary thread tensioner.
Both the non-operational switching and the non-operational / operational switching of the second auxiliary thread tensioner are performed, that is, the operation of the two devices can be controlled by the movement of the one movable part. The timing control for activating the means can be facilitated.
【００２１】請求項４記載の発明は、請求項１〜３の何
れかに記載のミシンの糸調子装置において、ミシンに備
わる自動糸切り装置による糸切断処理時に、前記張力解
除手段による解除、並びに、前記切換手段による切り換
えを実行させる制御手段を備えた構成とした。According to a fourth aspect of the present invention, in the thread tension device of the sewing machine according to any one of the first to third aspects, when the thread is cut by an automatic thread cutting device provided in the sewing machine, the tension is released by the tension releasing means; And a control means for executing the switching by the switching means.
【００２２】この請求項４記載の発明によれば、上記制
御手段の制御により、自動的に糸切断処理時に上記張力
解除手段と切換手段とを作動させることが出来るので、
縫製処理および糸切断処理の作業者の処理が簡略され
て、縫製上の操作内容を簡単なものにすることが出来
る。According to the fourth aspect of the present invention, the tension releasing means and the switching means can be automatically operated at the time of the thread cutting process under the control of the control means.
The operator's processes of the sewing process and the thread cutting process are simplified, and the contents of the sewing operation can be simplified.
【００２３】ここで、制御手段は、電気的な制御により
上記張力解除手段と切換手段とを作動させる制御回路と
しても良いし、機械的な構成により糸切り装置と連動し
て張力解除手段と切換手段とが作動するようにした制御
手段としても良い。Here, the control means may be a control circuit for activating the tension releasing means and the switching means by electrical control, or the mechanical means may be used to switch the tension releasing means and the switching means in conjunction with the thread cutting device. The control means may be configured so that the means operates.
【００２４】[0024]
【発明の実施の形態】以下、この発明の実施の形態につ
いて、図１〜図６の図面を参照しながら説明する。な
お、従来と同様の構成については、従来例で挙げた図面
の符号と同符号を付して説明を簡略に行う。 ［第１の実施の形態］図１は、本発明の第１の実施の形
態の糸調子装置を備えたミシンを示すミシン頭部側の側
面図、図２は、第１と第２の副糸調子器２１，２５と切
換装置３０の詳細を示すもので、同図（ａ）はその正面
図、（ｂ）は副糸調子器の縦断面図である。図１中、１
はミシンフレーム、２は糸巻きコーン、３は上糸、５は
主糸調子器としてのロータリ糸調子器、６は糸取りバ
ネ、７，９，１１は糸案内、８は天秤、１０は針棒、１
２は針、１３は針板、１４は被縫製物、１５は釜、１６
はボビンケース、１８は自動糸切り装置の動メス、１９
は自動糸切り装置の固定メス、２１は第２の副糸調子
器，２５は第１の副糸調子器、３０は切換装置である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. In addition, about the structure similar to a conventional, the description is simplified by attaching | subjecting the code | symbol same as the code | symbol of the drawing mentioned in the conventional example. [First Embodiment] FIG. 1 is a side view of a sewing machine equipped with a thread tension device according to a first embodiment of the present invention on the side of a sewing machine head, and FIG. FIGS. 3A and 3B show details of the thread tensioners 21 and 25 and the switching device 30. FIG. 1A is a front view thereof, and FIG. 1B is a longitudinal sectional view of an auxiliary thread tensioner. In FIG. 1, 1
Is a sewing machine frame, 2 is a thread winding cone, 3 is an upper thread, 5 is a rotary thread tensioner as a main thread tensioner, 6 is a thread take-up spring, 7, 9, 11 is a thread guide, 8 is a balance, 10 is a needle bar, 1
2 is a needle, 13 is a needle plate, 14 is a sewing object, 15 is a shuttle, 16
Is a bobbin case, 18 is a moving knife of an automatic thread trimmer, 19
Is a fixed knife of the automatic thread cutter, 21 is a second auxiliary thread tensioner, 25 is a first auxiliary thread tensioner, and 30 is a switching device.
【００２５】この実施の形態の糸調子装置は、内部に張
力解放装置を設けた主糸調子器としてのロータリ糸調子
器５、第１および第２の副糸調子器２１，２５、並び
に、切換装置３０から構成される。The thread tension device of this embodiment includes a rotary thread tension device 5 as a main thread tension device having a tension release device therein, first and second auxiliary thread tension devices 21 and 25, and switching. It is composed of a device 30.
【００２６】ロータリ糸調子器５は、従来のものと同様
の構成であり説明は簡略化するが、図９の縦断面図に示
すように、外周部に糸を導く溝部を有する回転プーリ５
ａ、この回転プーリ５ａに摺接して摩擦抵抗を与える摺
接部材５ｅ、摺接部材５ｅを押圧するスプリングバネ５
ｄ、並びに、このバネ力を調節する糸調子ナット５ｂ等
から構成され、上糸３を回転プーリ５ａの溝部に沿わせ
て回転プーリ５ａを回転させることで、上糸３に張力を
与えるようになっている。The rotary thread tensioner 5 has the same structure as that of the conventional thread tensioner, and the description thereof will be simplified. However, as shown in the longitudinal sectional view of FIG.
a, a sliding member 5e that slides on the rotary pulley 5a to provide frictional resistance, and a spring 5 that presses the sliding member 5e.
d, a thread tension nut 5b for adjusting the spring force, and the like. The tension is applied to the upper thread 3 by rotating the rotary pulley 5a along the groove of the rotary pulley 5a. Has become.
【００２７】また、ロータリ糸調子器５の内部に設けら
れた張力解放装置も、従来のものと同様の構成であり説
明は簡略化するが、ロータリ糸調子器５の支軸５ｃの内
部に通された糸緩めピン３８と、該ピンを駆動する例え
ば糸緩めソレノイド９８（図３）等の駆動手段とを備え
て構成され、上記糸緩めピン３８でロータリ糸調子器５
の摺接部材５ｅをスプリングバネ５ｄに抗して押し上げ
ることで、ロータリ糸調子器５の張力を解放するもので
ある。The tension releasing device provided inside the rotary thread tensioner 5 has the same structure as that of the conventional one and its description is simplified, but the tension releasing device is provided inside the support shaft 5c of the rotary thread tensioner 5. And a drive means such as a thread loosening solenoid 98 (FIG. 3) for driving the pin.
By pushing up the sliding contact member 5e against the spring 5d, the tension of the rotary thread tensioner 5 is released.
【００２８】第１および第２の副糸調子器２５，２１
は、ミシンフレーム１に固定された土台２０上にそれぞ
れ設けられている。土台２０には、上糸３を上流側から
第２の副糸調子器２１に導く糸ガイド２０Ａと第１の副
糸調子器２５から下流側に導く糸ガイド２０Ｂとが設け
られている。第１の副糸調子器２５は、糸調子棒２６、
２枚の糸調子皿２５Ａ，２５Ａ、糸調子バネ２８、およ
び、糸調子ナット２７等から構成され、第２の副糸調子
器２１は、糸調子棒２２、２枚の糸調子皿２１Ａ，２１
Ａ、糸調子バネ２４、および、糸調子ナット２３等から
構成される。First and second auxiliary thread tensioners 25, 21
Are respectively provided on a base 20 fixed to the sewing machine frame 1. The base 20 is provided with a thread guide 20A that guides the upper thread 3 from the upstream side to the second auxiliary thread tensioner 21 and a thread guide 20B that guides the upper thread 3 from the first auxiliary thread tensioner 25 to the downstream side. The first auxiliary thread tensioner 25 includes a thread tension bar 26,
The second auxiliary thread tensioner 21 is composed of two thread tension discs 25A, 25A, a thread tension spring 28, a thread tension nut 27, and the like.
A, a thread tension spring 24, a thread tension nut 23, and the like.
【００２９】糸調子棒２２，２６は、その先端付近にネ
ジ２２ａ，２６ａが設けられ、土台２０に固定されてい
る。糸調子皿２５Ａ，２５Ａは糸調子棒２６に挿入さ
れ、２枚の皿の間に上糸３を挟み込んで、糸調子バネ２
８の押圧力により上糸に摩擦抵抗を与えている。糸調子
皿２１Ａ，２１Ａも同様に糸調子棒２２に挿入され、２
枚の皿の間に上糸３を挟み込んで、糸調子バネ２４の押
圧力により上糸に摩擦抵抗を与えている。上記の第１お
よび第２の副糸調子器２５，２１により得られる摩擦力
は、それぞれ糸調子ナット２７，２３を回すことで調整
可能となっている。The thread tension bars 22 and 26 are provided with screws 22 a and 26 a near the ends thereof, and are fixed to the base 20. The thread tension discs 25A, 25A are inserted into a thread tension bar 26, and the upper thread 3 is inserted between the two discs to form a thread tension spring 2
The pressing force of 8 gives frictional resistance to the upper thread. The thread tension plates 21A, 21A are similarly inserted into the thread tension
The upper thread 3 is sandwiched between the plates, and a frictional resistance is given to the upper thread by the pressing force of the thread tension spring 24. The frictional force obtained by the first and second auxiliary thread tensioners 25 and 21 can be adjusted by turning the thread tension nuts 27 and 23, respectively.
【００３０】第１および第２の副糸調子器２５，２１の
張力の調整は、第１の副糸調子器２５については、糸切
断後の糸残り長さが適宜得られるように糸切断処理に合
せて行い、第２の副糸調子器２１については、縫製時の
張力が適宜得られるようにロータリ糸調子器５に合せて
行う。なお、これら第１および第２の副糸調子器２５，
２１の位置関係は、互いに入れ替ったとしても機構上影
響は無いものである。The tension of the first and second auxiliary thread tensioners 25 and 21 is adjusted by performing a thread cutting process on the first auxiliary thread tensioner 25 so that the remaining thread length after the thread is cut can be appropriately obtained. The second auxiliary thread tensioner 21 is adjusted in accordance with the rotary thread tensioner 5 so that a tension at the time of sewing is appropriately obtained. The first and second auxiliary thread tensioners 25,
The positional relationship of 21 has no mechanical effect even if they are interchanged.
【００３１】切換装置３０は、駆動手段としての糸調子
切換えソレノイド３１と、切換腕３４とから構成され
る。切換腕３４は、土台２０上に設けた支点３５に回転
可能にに取り付けられると共に、糸調子切換えソレノイ
ド３１のプランジャ（可動部）３１ａにピン３２を介し
て接続され、糸調子切換えソレノイド３１の駆動により
揺動運動を行う。The switching device 30 comprises a thread tension switching solenoid 31 as a driving means, and a switching arm 34. The switching arm 34 is rotatably attached to a fulcrum 35 provided on the base 20, and is connected to a plunger (movable part) 31 a of the thread tension switching solenoid 31 via a pin 32, and drives the thread tension switching solenoid 31. Performs a rocking motion.
【００３２】切換腕３４の一端側には二股の爪形状部３
４ａａ，３４ａｂが設けられ、プランジャ３１ａがバネ
３３により押し出される方向に移動することで、この二
股の爪形状部３４ａａ，３４ａｂが第２の副糸調子器２
１の糸調子皿２１Ａ，２１Ａの間に挿入され、プランジ
ャ３１ａが引き込まれることで、この二股の爪形状部３
４ａａ，３４ａｂが第２の副糸調子器２１から引き離さ
れるようになっている。一方、切換腕３４の他端側には
同様の爪形状部３４ｂｂ，３４ｂａが設けられ、プラン
ジャ３１ａがバネ３３により押し出される方向に移動す
ることで、この二股の爪形状部３４ｂｂ，３４ｂａが第
１の副糸調子器２５から引き離され、プランジャ３１ａ
が引き込まれることで、この二股の爪形状部３４ｂｂ，
３４ｂａが第１の副糸調子器２５の糸調子皿２５Ａ，２
５Ａの間に挿入されるようになっている。つまり、上記
切換腕３４はリンクを、爪形状部３４ｂｂ，３４ｂａと
爪形状部３４ａａ，３４ａｂとは第１および第２の作動
部をそれぞれ構成している。On one end of the switching arm 34, a forked claw-shaped portion 3 is provided.
4aa, 34ab are provided, and the bifurcated claw-shaped portions 34aa, 34ab are moved in the direction in which the plunger 31a is pushed out by the spring 33.
1 is inserted between the thread tension discs 21A, 21A, and the plunger 31a is retracted, whereby the forked claw-shaped portion 3 is formed.
4aa and 34ab are separated from the second auxiliary thread tensioner 21. On the other hand, similar claw-shaped portions 34bb and 34ba are provided on the other end side of the switching arm 34, and the bifurcated claw-shaped portions 34bb and 34ba are moved in the direction in which the plunger 31a is pushed out by the spring 33. Of the plunger 31a
Is drawn, the forked claw-shaped portions 34bb,
34ba is the thread tension plate 25A, 2 of the first auxiliary thread tensioner 25.
5A. That is, the switching arm 34 constitutes a link, and the claw-shaped portions 34bb, 34ba and the claw-shaped portions 34aa, 34ab constitute first and second operating portions, respectively.
【００３３】上記二股の爪形状部３４ａａ，３４ａｂ
は、糸調子皿２１Ａ，２１Ａの両端を浮かすように挿入
されて、糸調子皿２１Ａ，２１Ａの間の上糸３の押圧を
解除する。もう一方の二股の爪形状部３４ｂｂ，３４ｂ
ａについても同様である。The forked claws 34aa, 34ab
Is inserted so as to float both ends of the thread tension discs 21A, 21A to release the pressing of the upper thread 3 between the thread tension discs 21A, 21A. The other forked claw-shaped portions 34bb, 34b
The same applies to a.
【００３４】通常の縫製時など、糸調子切換えソレノイ
ド３１がオフの状態にある場合には、戻しバネ３３によ
ってプランジャ３１ａが押し出された状態にあり、上糸
３は第１の副糸調子器２５からのみ張力が付与され、第
２の副糸調子器２１から張力が付与されない状態とな
る。一方、糸切断処理時など、糸調子切換えソレノイド
３１がオンの状態にある場合には、プランジャ３１ａが
引き戻された状態となり、上糸３は第２の副糸調子器２
１からのみ張力が付与され、第１の副糸調子器２５から
張力が付与されない状態となる。When the thread tension switching solenoid 31 is in an off state, such as during normal sewing, the plunger 31a is pushed out by the return spring 33, and the upper thread 3 is moved to the first auxiliary thread tensioner 25. And tension is not applied from the second auxiliary thread tensioner 21. On the other hand, when the thread tension switching solenoid 31 is in the ON state, for example, during the thread cutting process, the plunger 31a is in the retracted state, and the upper thread 3 is moved to the second auxiliary thread tensioner 2
The tension is applied only from 1 and no tension is applied from the first auxiliary thread tensioner 25.
【００３５】図３には、上記糸調子装置を備えたミシン
の回路構成のブロック図を示す。ミシンには、縫製処理
の制御を行う制御回路８０が設けられている。制御回路
８０は、ＣＰＵ（Central Processing Unit ）、ＲＡＭ
（Random Access Memory）、ＲＯＭ（Read Only Memor
y）を有する制御部８１、ミシンモータ９３を駆動する
モータ駆動回路８２、並びに、各種駆動系の操作を行う
ソレノイドドライバ８３等から構成される。制御部８１
には、図示略のインターフェースを介して上軸角度検出
器９１やペダルセンサ９２が接続され、ソレノイドドラ
イバ８３には、糸払いソレノイド９４、逆送りソレノイ
ド９５、自動押え上げソレノイド９６、糸切りソレノイ
ド９７、糸緩めソレノイド９８および糸調子切換えソレ
ノイド３１等が接続されている。FIG. 3 is a block diagram showing a circuit configuration of a sewing machine provided with the thread tension device. The sewing machine is provided with a control circuit 80 for controlling the sewing process. The control circuit 80 includes a CPU (Central Processing Unit), a RAM
(Random Access Memory), ROM (Read Only Memor)
y), a motor drive circuit 82 for driving the sewing machine motor 93, a solenoid driver 83 for operating various drive systems, and the like. Control unit 81
Is connected to an upper shaft angle detector 91 and a pedal sensor 92 via an interface (not shown), and a solenoid driver 83 includes a thread removing solenoid 94, a reverse feed solenoid 95, an automatic presser lifting solenoid 96, and a thread cutting solenoid 97. , A thread loosening solenoid 98 and a thread tension switching solenoid 31 are connected.
【００３６】ここで、上軸角度検出器９１は、ミシンの
上軸の角度を検出するもので、この検出により針１２が
上方に位置していることを示す針上位置信号、針１２が
下方に位置していることを示す針下位置信号、並びに、
ミシンの速度を示す速度検知信号等を制御部８１に出力
する。ペダルセンサは、図示しないペダルの中位置、前
踏み位置、後踏み位置の各状態を検知するもので、その
状態に応じてミシン起動信号、糸切り信号、停止信号、
速度信号をそれぞれ制御部８１に出力する。糸払いソレ
ノイド９４は、布押え上に上糸３が来るように糸切り後
に上糸を払うワイパー（図示略）を始動させるためのソ
レノイド、逆送りソレノイド９５は返し縫いを行う際に
布送り機構を反転させるためのソレノイド、自動押え上
げソレノイド９６は布押えを上昇させるためのソレノイ
ド、糸切りソレノイド９７は自動糸切り装置を始動させ
るためのソレノイド、糸緩めソレノイド９８はロータリ
糸調子器５内部の張力解放装置の駆動手段である。Here, the upper shaft angle detector 91 detects the angle of the upper shaft of the sewing machine, and based on this detection, a needle-up position signal indicating that the needle 12 is at the upper position, and the needle 12 at the lower position. Needle position signal indicating that the hand is located at
A speed detection signal indicating the speed of the sewing machine is output to the control unit 81. The pedal sensor detects the middle position of the pedal (not shown), the front depression position, and the rear depression position, and according to the state, a sewing machine start signal, a thread trimming signal, a stop signal,
The speed signals are output to the control unit 81, respectively. A thread wiper solenoid 94 is a solenoid for starting a wiper (not shown) that removes the upper thread after thread trimming so that the upper thread 3 comes on the cloth presser. A reverse feed solenoid 95 operates a cloth feed mechanism when performing reverse stitching. A solenoid for reversing, an automatic presser lifting solenoid 96 is a solenoid for raising the work clamp, a thread trimming solenoid 97 is a solenoid for starting the automatic thread trimming device, and a thread loosening solenoid 98 is a tension in the rotary thread tensioner 5. Drive means for the release device.
【００３７】なお、上記糸切りソレノイド９７は、例え
ば各装置に連結されるコロをカムに挿入するなどして各
装置の始動を行うものであり、各装置の駆動力は上記カ
ム等から導出されるのが一般である。The thread cutting solenoid 97 starts each device by, for example, inserting a roller connected to each device into a cam, and the driving force of each device is derived from the cam or the like. Generally it is.
【００３８】次に、上記構成の糸調子装置を備えたミシ
ンの動作について説明する。図４には、ミシンの各駆動
系の動作タイミングのタイミングチャートを示す。通常
の縫製時には、上軸角度検出器９１から制御部８１に針
下位置信号と針上位置信号とが交互に入力されていく。
この状態で作業者がペダルを前踏み位置から後踏み操作
すると、図４に示すように、ペダルセンサ９２から制御
部８１に糸切り信号が出力され、この信号出力が一定期
間出力された後、針下位置信号の入力の直後に、糸切り
ソレノイド９７、糸緩めソレノイド９８、糸調子切換え
ソレノイド３１がそれぞれ駆動される。Next, the operation of the sewing machine having the above-described thread tension device will be described. FIG. 4 shows a timing chart of the operation timing of each drive system of the sewing machine. During normal sewing, the needle lower position signal and the needle upper position signal are alternately input from the upper shaft angle detector 91 to the controller 81.
In this state, when the operator depresses the pedal from the front depressed position to the rear, a thread cut signal is output from the pedal sensor 92 to the controller 81 as shown in FIG. Immediately after the input of the needle down position signal, the thread trimming solenoid 97, the thread loosening solenoid 98, and the thread tension switching solenoid 31 are driven.
【００３９】これらの駆動により、自動糸切り装置が糸
切断処理の動作を始動し、同時に、張力解除装置が作動
してロータリ糸調子器５による張力付与が解除され、且
つ、切換装置３０が作動して第１の副糸調子器２５によ
る張力付与が解除されると共に、第２の副糸調子器２１
から張力が付与される。つまり、自動糸切り装置による
糸切断処理時には、第２の副糸調子器２１からのみ上糸
３に張力が付与され、糸切断処理にあった張力が付与さ
れることとなって、糸切断処理後に針先に残される糸残
り長さが所望の長さになる。自動糸切り装置による糸切
断処理の動作内容は従来例で示した如くである。With these drives, the automatic thread cutting device starts the operation of the thread cutting process, and at the same time, the tension release device is activated to release the tension application by the rotary thread tensioner 5, and the switching device 30 is activated. Then, the tension application by the first auxiliary thread tensioner 25 is released, and the second auxiliary thread tensioner 21 is released.
From the tension. That is, at the time of the thread cutting process by the automatic thread cutting device, the tension is applied to the upper thread 3 only from the second auxiliary thread tensioner 21, and the tension suitable for the thread cutting process is applied. The remaining thread length remaining at the needle tip later becomes the desired length. The operation content of the thread cutting process by the automatic thread cutting device is as shown in the conventional example.
【００４０】糸切断処理が終了すると、糸緩めソレノイ
ド９８と糸調子切換えソレノイド３１がオフされて、ロ
ータリ糸調子器５と第１および第２の副糸調子器２５，
２１が縫製時の状態に戻される。その後、糸払いソレノ
イド９４が駆動してワイパーにより糸払いが行われ、そ
の後、自動押え上げソレノイド９６が駆動して布押えが
自動的に上昇されて、縫製処理が終了される。When the thread cutting process is completed, the thread loosening solenoid 98 and the thread tension switching solenoid 31 are turned off, and the rotary thread tension device 5 and the first and second auxiliary thread tension devices 25,
21 is returned to the state at the time of sewing. Thereafter, the thread removing solenoid 94 is driven to perform thread removing by the wiper. Thereafter, the automatic presser lifting solenoid 96 is driven to automatically raise the cloth presser, thereby completing the sewing process.
【００４１】図５には、ミシンの制御部８１により行わ
れる縫製終了処理のフローチャートを示す。この縫製終
了処理は、縫製中に作業者によりペダルが後踏みされた
場合に開始される。即ち、ステップＳ１においてペダル
センサ９２から後踏み位置を示す信号が検知されるとス
テップＳ２に移行される。ステップＳ２では、上軸角度
検出器９１からの信号によりミシンが低速動作か否かが
判定され、低速であればステップＳ３に移行するが、低
速でなければ（高速であれば）低速になるまでステップ
Ｓ２を繰り返す。FIG. 5 shows a flowchart of the sewing end process performed by the controller 81 of the sewing machine. The sewing end process is started when the operator steps on the pedal backward during sewing. That is, when a signal indicating the rear depressed position is detected from the pedal sensor 92 in step S1, the process proceeds to step S2. In step S2, it is determined whether or not the sewing machine is operating at a low speed based on a signal from the upper shaft angle detector 91. If the speed is low, the process proceeds to step S3. Step S2 is repeated.
【００４２】ミシンが低速になってステップＳ３に移行
されたら、ペダルセンサ９２から、未だ後踏み位置の信
号が出力されているか否かが判定され、出力されていれ
ばステップＳ４に移行するが、出力されてなければステ
ップＳ１に戻る。つまり、このステップＳ３の処理によ
り、ミシンが低速になった後に後踏みが行われている場
合に限って糸切断処理に移行するようになっている。When the speed of the sewing machine becomes low and the process proceeds to step S3, it is determined whether or not the signal of the rear depressed position is still output from the pedal sensor 92. If the signal is output, the process proceeds to step S4. If not, the process returns to step S1. That is, by the process of step S3, the process shifts to the thread cutting process only when the rear stepping is performed after the speed of the sewing machine is reduced.
【００４３】ステップＳ４では、上軸角度検出器９１か
ら針下位置信号が出力されたか否かを判定し、出力され
るまでこのステップＳ４を繰り返し、出力された場合に
ステップＳ５に移行する。つまり、このステップＳ４の
処理により針１２が下死点から上昇していくタイミング
で糸切断処理が行われるようになり、針１２が自動糸切
り装置の動メス１８と衝突しないように制御される。In step S4, it is determined whether or not a needle down position signal has been output from the upper shaft angle detector 91, and this step S4 is repeated until the signal is output. If output, the process proceeds to step S5. In other words, the thread cutting process is performed at the timing when the needle 12 rises from the bottom dead center by the process of step S4, and the needle 12 is controlled so as not to collide with the moving knife 18 of the automatic thread cutting device. .
【００４４】ステップＳ５〜Ｓ７では、順次、糸切りソ
レノイド９７、糸緩めソレノイド９８、糸調子切換えソ
レノイド３１を励磁して、ステップＳ８に移行する。ス
テップＳ８では、上軸角度検出器９１から針上位置信号
が出力されたか否かを判定し、出力されるまでこのステ
ップＳ８を繰り返し、出力された場合にステップＳ９に
移行する。ステップＳ９では、短い設定時間待ってステ
ップＳ１０に移行する。In steps S5 to S7, the thread trimming solenoid 97, the thread loosening solenoid 98, and the thread tension switching solenoid 31 are sequentially excited, and the process proceeds to step S8. In step S8, it is determined whether or not the needle position signal has been output from the upper shaft angle detector 91, and this step S8 is repeated until the signal is output. If output, the process proceeds to step S9. In step S9, the process proceeds to step S10 after waiting for a short set time.
【００４５】ステップＳ１０〜Ｓ１２では、順次、糸切
りソレノイド９７、糸緩めソレノイド９８、糸調子切換
えソレノイド３１を消磁して、ステップＳ１３に移行
し、該ステップＳ１３で短い設定時間待ってステップＳ
１４に移行する。In steps S10 to S12, the thread trimming solenoid 97, the thread loosening solenoid 98, and the thread tension switching solenoid 31 are sequentially demagnetized, and the process proceeds to step S13. After waiting a short set time in step S13, the process proceeds to step S13.
Go to 14.
【００４６】その後、順次、糸払いソレノイド９４の励
磁（ステップＳ１４）、設定時間の待機（ステップＳ１
５）、糸払いソレノイド９４の消磁（ステップＳ１
６）、設定時間の待機（ステップＳ１７）、自動押え上
げソレノイド９６の励磁（ステップＳ１８）を行って、
この縫製終了処理を終了する。Thereafter, the thread sweep solenoid 94 is sequentially excited (step S14), and waits for a set time (step S1).
5), degaussing of thread removing solenoid 94 (step S1)
6), wait for a set time (step S17), excite the automatic presser lifting solenoid 96 (step S18),
This sewing end process ends.
【００４７】以上説明したように、本発明によれば、縫
製時と糸切断処理時の上糸３に与える張力を別々の糸調
子器（ロータリ糸調子器５および第１の副糸調子器２５
と、第２の副糸調子器２１）によって制御することによ
り、各々に適した張力をかけられるようになり、縫い品
質と針糸残り長さを両方とも満足することが出来る。ま
た、上記の切換装置３０により、第１の副糸調子器２５
の作用／非作用の切換と、第２の副糸調子器２１の非作
用／作用の切換との両方が一度に遂行されるので、切換
装置３０を作動させるタイミング制御を容易にすること
が出来る。As described above, according to the present invention, the tension applied to the upper thread 3 at the time of sewing and at the time of the thread cutting process is controlled by a different thread tensioner (the rotary thread tensioner 5 and the first auxiliary thread tensioner 25).
And by the second auxiliary thread tensioner 21), it is possible to apply a tension suitable for each, and it is possible to satisfy both the sewing quality and the remaining length of the needle thread. In addition, the switching device 30 allows the first auxiliary thread tensioner 25
Both the switching of the operation / non-operation and the switching of the non-operation / action of the second auxiliary thread tensioner 21 are performed at one time, so that the timing control for operating the switching device 30 can be facilitated. .
【００４８】なお、本発明は、この実施の形態の糸調子
装置に限られるものではなく、例えば、主糸調子器とし
てプリテンションを必要としない糸調子器を使用すると
共に、副糸調子器を１個だけ設け、この副糸調子器に対
して切換手段が第２の副糸調子器２１と同様の処理を行
うようにすることで、上記同様の作用効果が得られる。
その他、第１第２の副糸調子器２１，２５の配置や構
成、主糸調子器や切換手段の構成など、この実施の形態
で示した細部構造等は、発明の趣旨を逸脱しない範囲で
適宜変更可能である。The present invention is not limited to the thread tension device of this embodiment. For example, a thread tension device which does not require pretension is used as a main thread tension device, and a sub thread tension device is used. The same operation and effect as described above can be obtained by providing only one piece and making the switching means perform the same processing as that of the second auxiliary thread tensioner 21 on this auxiliary thread tensioner.
In addition, the detailed structure and the like shown in this embodiment, such as the arrangement and configuration of the first and second sub-thread tensioners 21 and 25, the configuration of the main thread tensioner and the switching means, and the like, do not depart from the spirit of the invention. It can be changed as appropriate.
【００４９】［第２の実施の形態］図６は、本発明の第
２の実施の形態の糸調子装置の副糸調子器および切換装
置を示すもので、（ａ）は正面図、（ｂ）は一部縦断の
側面図である。この実施の形態は、切換手段の構成を変
化例を示すものであり、その他の構成および制御内容に
ついては、第１の実施の形態の構成とほぼ同様のもので
ある。この実施の形態の第１および第２の副糸調子器４
２，５１は、第１の実施の形態のものとほぼ同様の構成
である。異なる構成は、糸調子棒４３，５２に挿入孔４
３ｂ，５２ｂがそれぞれ形成されて、糸緩めピン４６，
５５が挿入されている点と、外側の糸調子皿４２Ａ，５
１Ａにそれぞれ接続されている当接片４２ａ，５１ａが
上記糸調子棒４３，５２内に通されて、上記糸調子棒４
３，５２の長手方向に可動状態にされている点である。[Second Embodiment] FIGS. 6A and 6B show a secondary thread tensioner and a switching device of a thread tension device according to a second embodiment of the present invention. FIG. 6A is a front view, and FIG. ) Is a partially longitudinal side view. This embodiment shows a modification of the configuration of the switching means, and the other configurations and control contents are almost the same as those of the first embodiment. First and second auxiliary thread tensioners 4 of this embodiment
Reference numerals 2 and 51 have substantially the same configuration as that of the first embodiment. A different configuration is that the thread tension rods 43 and 52 have insertion holes 4
3b, 52b are formed respectively, and the thread loosening pins 46,
55 and the outer thread tension dishes 42A, 5
The contact pieces 42a and 51a connected to the thread tension rods 1 and 1A are passed through the thread tension rods 43 and 52, respectively.
3 and 52 are movable in the longitudinal direction.
【００５０】切換装置（切換手段）６０は、駆動手段と
しての糸調子切換えソレノイド６１と、リンクとしての
切換腕６４、並びに、第１および第２の作動部としての
糸緩めピン５５，４６とから構成され、ミシンフレーム
１内に設けられている。切換腕６４は支点６５に回転可
能に取り付けられると共に、糸調子切換えソレノイド６
１のプランジャ（可動部）６１ａにピン６２を介して接
続され、糸調子切換えソレノイド６１の駆動により揺動
運動を行う。The switching device (switching means) 60 includes a thread tension switching solenoid 61 as driving means, a switching arm 64 as a link, and thread loosening pins 55 and 46 as first and second operating portions. And is provided in the sewing machine frame 1. The switching arm 64 is rotatably attached to a fulcrum 65 and has a thread tension switching solenoid 6.
1 is connected via a pin 62 to a plunger (movable part) 61 a and performs a swinging motion by driving a thread tension switching solenoid 61.
【００５１】通常の縫製時など、糸調子切換えソレノイ
ド６１がオフの状態にある場合には、戻しバネ６３によ
ってプランジャ６１ａが押し出された状態になり、切換
腕６４が糸緩めピン４６を押して、第２の副糸調子器４
２の調子皿４２Ａ，４２Ａの間を押し広げる。従って、
上糸３は第１の副糸調子器５１からのみ張力が付与さ
れ、第２の副糸調子器４２から張力が付与されない状態
となる。一方、糸切断処理時など、糸調子切換えソレノ
イド６１がオンの状態にある場合には、プランジャ３１
ａが引き戻された状態となり、切換腕６４が糸緩めピン
５５を押して、第１の副糸調子器５１の調子皿５１Ａ，
５１Ａの間を押し広げる。従って、上糸３は第２の副糸
調子器４２からのみ張力が付与され、第１の副糸調子器
５５から張力が付与されない状態となる。When the thread tension switching solenoid 61 is in an off state, for example, during normal sewing, the plunger 61a is pushed out by the return spring 63, and the switching arm 64 pushes the thread loosening pin 46 so that the 2 auxiliary thread tensioner 4
The two tone plates 42A, 42A are pushed apart. Therefore,
A tension is applied to the upper thread 3 only from the first auxiliary thread tensioner 51, and no tension is applied from the second auxiliary thread tensioner 42. On the other hand, when the thread tension switching solenoid 61 is on, such as during the thread cutting process, the plunger 31
a is pulled back, the switching arm 64 pushes the thread loosening pin 55, and the tension plates 51A, 51A of the first auxiliary thread tensioner 51 are moved.
Push between 51A. Accordingly, tension is applied to the upper thread 3 only from the second auxiliary thread tensioner 42, and no tension is applied from the first auxiliary thread tensioner 55.
【００５２】上記の第１および第２の副糸調子器５１，
４２の張力の調整は、第１の副糸調子器５１について
は、糸切断後の糸残り長さが適宜得られるように糸切断
処理に合せて行い、第２の副糸調子器４２については、
縫製時の張力が適宜得られるようにロータリ糸調子器５
に合せて行う。The first and second auxiliary thread tensioners 51,
The adjustment of the tension of 42 is performed in accordance with the yarn cutting process so that the remaining yarn length after the yarn cutting is appropriately obtained for the first auxiliary yarn tensioner 51, and the adjustment of the tension of the second auxiliary yarn tensioner 42 is performed. ,
Rotary thread tensioner 5 so that tension at the time of sewing can be appropriately obtained.
Perform according to.
【００５３】以上のように、この実施の形態のミシンの
糸調子装置によっても、第１の実施の形態と同様の作用
効果を奏すこととなる。As described above, the same operation and effect as those of the first embodiment can be obtained by the thread tension device of the sewing machine of this embodiment.
【００５４】[0054]
【発明の効果】請求項１記載の発明によれば、縫製時の
糸張力を調整する主糸調子器として、プリテンション
（予め上流側で付与される弱い張力）を必要としない糸
調子器（例えば調子皿等）を使用した場合に、縫製時の
糸張力と糸切断処理時の糸張力との何れに対しても適切
な張力を付与することが出来る。従って、例えば薄物や
柔らかい布を低張力で縫製する場合であっても、縫製時
の糸張力を適切なものとして仕上りの美しい縫製を行う
ことが出来ると共に、糸切断処理時の糸張力も適切なも
のにして針先の糸残り長さを安定させることが出来る。According to the first aspect of the present invention, as a main thread tensioner for adjusting the thread tension at the time of sewing, a thread tensioner that does not require a pretension (a weak tension applied in advance on the upstream side). For example, when a tension plate or the like is used, an appropriate tension can be applied to both the thread tension during sewing and the thread tension during thread cutting processing. Therefore, for example, even when sewing a thin or soft cloth with a low tension, the thread tension at the time of sewing can be set to an appropriate value and a beautifully finished sewing can be performed. The stitch length of the needle tip can be stabilized.
【００５５】請求項２記載の発明によれば、縫製時の糸
張力を調整する主糸調子器として、プリテンション（予
め上流側で付与される弱い張力）を必要とする糸調子器
（例えばロータリ糸調子器等）を使用した場合に、縫製
時の糸張力と糸切断処理時の糸張力との何れに対しても
適切な張力を付与することが出来る。従って、例えば薄
物や柔らかい布を低張力で縫製する場合であっても、縫
製時の糸張力を適切なものとして仕上りの美しい縫製を
行うことが出来ると共に、糸切断処理時の糸張力も適切
なものにして針先の糸残り長さを安定させることが出来
る。According to the second aspect of the present invention, as a main thread tensioner for adjusting the thread tension at the time of sewing, a thread tensioner (for example, a rotary tensioner) requiring a pretension (a weak tension applied in advance on the upstream side) is required. When a thread tensioner or the like is used, an appropriate tension can be applied to both the thread tension during sewing and the thread tension during thread cutting processing. Therefore, for example, even when sewing a thin or soft cloth with a low tension, the thread tension at the time of sewing can be set to an appropriate value and a beautifully finished sewing can be performed. The stitch length of the needle tip can be stabilized.
【００５６】請求項３記載の発明によれば、駆動手段の
可動部の往復動のみで、第１の副糸調子器の作用／非作
用の切換と、第２の副糸調子器の非作用／作用の切換と
の両方が遂行され、即ち、２個の機器の動作を上記１個
の可動部の運動で制御できるので、切換手段を作動させ
るタイミング制御を容易にすることが出来る。According to the third aspect of the present invention, only the reciprocating movement of the movable portion of the drive means switches the operation / non-operation of the first auxiliary thread tensioner and the non-operation of the second auxiliary thread tensioner. Since both operations / switching of the operation are performed, that is, the operations of the two devices can be controlled by the movement of the one movable portion, the timing control for operating the switching means can be facilitated.
【００５７】請求項４記載の発明によれば、制御手段の
制御により、自動的に糸切断処理時に上記張力解除手段
と切換手段とを作動させることが出来るので、縫製処理
および糸切断処理の作業者の処理が簡略されて、縫製上
の操作内容を簡単なものにすることが出来る。According to the fourth aspect of the present invention, the tension releasing means and the switching means can be automatically operated at the time of the thread cutting process under the control of the control means. The user's processing is simplified, and the contents of the sewing operation can be simplified.
【図１】本発明の第１の実施の形態の糸調子装置を備え
たミシンを示すミシン頭部側の側面図である。FIG. 1 is a side view of a sewing machine equipped with a thread tension device according to a first embodiment of the present invention, showing a sewing machine head side.
【図２】副糸調子器と切換装置の詳細を示すもので、
（ａ）はその正面図、（ｂ）は副糸調子器の縦断面図で
ある。FIG. 2 shows details of an auxiliary thread tensioner and a switching device.
(A) is the front view, (b) is a longitudinal cross-sectional view of an auxiliary thread tensioner.
【図３】図１のミシンの回路構成を示すブロック図であ
る。FIG. 3 is a block diagram illustrating a circuit configuration of the sewing machine of FIG. 1;
【図４】同、ミシンの各駆動系の動作タイミングを示す
タイミングチャートである。FIG. 4 is a timing chart showing the operation timing of each drive system of the sewing machine.
【図５】同、ミシンの制御回路により行われる縫製終了
処理の手順を示すフローチャートである。FIG. 5 is a flowchart showing a procedure of a sewing end process performed by a control circuit of the sewing machine.
【図６】本発明の第２の実施の形態の副糸調子器と切換
装置の詳細を示すもので、（ａ）はその正面図、（ｂ）
は側方から眺めた一部断面を含む側面図である。FIGS. 6A and 6B show details of an auxiliary thread tensioner and a switching device according to a second embodiment of the present invention, wherein FIG.
FIG. 3 is a side view including a partial cross section viewed from the side.
【図７】従来のミシンの頭部側を示す側面図である。FIG. 7 is a side view showing a head side of a conventional sewing machine.
【図８】糸切り装置により行われる糸切断処理を順次示
すもので、（ａ）〜（ｃ）は針付近を側方から眺めた断
面図、（ａ’）は（ａ）の動メスと固定メスとの上面図
である。8 (a) to 8 (c) are cross-sectional views of the vicinity of the needle viewed from the side, and FIG. 8 (a ′) is a cross-sectional view of the moving knife shown in FIG. It is a top view with a fixed knife.
【図９】ミシンに備わる主糸調子器を示す縦断面図であ
る。FIG. 9 is a longitudinal sectional view showing a main thread tensioner provided in the sewing machine.
１ ミシンフレーム ３ 上糸 ５ ロータリ糸調子器（主糸調子器） １８ 自動糸切り装置の動メス １９ 自動糸切り装置の固定メス ２１ 第２の副糸調子器 ２５ 第１の副糸調子器 ３０ 切換装置（切換手段） ３１ 糸調子切換えソレノイド ３４ 切換腕（リンク） ３４ｂｂ，３４ｂａ 爪形状部（第１の作動部） ３４ａａ，３４ａｂ 爪形状部（第２の作動部） ８０ 制御回路（制御手段） ４２ 第２の副糸調子器（第２の実施の形態） ５１ 第１の副糸調子器（第２の実施の形態） ４６，５５ 糸緩めピン（第１および第２の
作動部） ６０ 切換装置（第２の実施の形態） ６１ 糸調子切換えソレノイド ６４ 切換腕DESCRIPTION OF SYMBOLS 1 Sewing machine frame 3 Needle thread 5 Rotary thread tensioner (main thread tensioner) 18 Moving knife of automatic thread trimmer 19 Fixed knife of automatic thread trimmer 21 Second auxiliary thread tensioner 25 First auxiliary thread tensioner 30 Switching device (switching means) 31 Thread tension switching solenoid 34 Switching arm (link) 34bb, 34ba Claw-shaped portion (first operating portion) 34aa, 34ab Claw-shaped portion (second operating portion) 80 Control circuit (control means) 42 Second auxiliary thread tensioner (Second embodiment) 51 First auxiliary thread tensioner (Second embodiment) 46, 55 Thread loosening pin (First and second operating parts) 60 Switching Apparatus (second embodiment) 61 Thread tension switching solenoid 64 Switching arm
Claims (4)
調整する主糸調子器と、 該主糸調子器と異なる箇所で上糸に副張力を付与可能な
副糸調子器と、 任意のタイミングで前記主糸調子器による張力付与を解
除可能な張力解除手段と、 任意のタイミングで前記副糸調子器の状態を張力付与解
除の状態から張力付与の状態に切り換え可能な切換手段
とを備えたことを特徴とするミシンの糸調子装置。1. A main thread tensioner for applying a tension to an upper thread to adjust a thread tension at the time of sewing, and a sub thread tensioner capable of applying a sub-tension to the upper thread at a location different from the main thread tensioner. Tension releasing means for releasing the tension applied by the main thread tensioner at an arbitrary timing; and switching means capable of switching the state of the auxiliary thread tensioner from the tension released state to the tension applied state at an arbitrary timing. And a thread tension device for a sewing machine.
い張力を必要とすると共に、この上糸に張力を付与して
縫製時の糸張力を調整する主糸調子器と、 該主糸調子器の上流側で上糸に第１張力を付与可能な第
１の副糸調子器および第２張力を付与可能な第２の副糸
調子器と、 任意のタイミングで前記主糸調子器による張力付与を解
除可能な張力解除手段と、 任意のタイミングで前記第１の副糸調子器の状態を張力
付与の状態から張力付与解除の状態に切り換えると共
に、前記第２の副糸調子器の状態を張力付与解除の状態
から張力付与の状態に切り換え可能な切換手段とを備え
たことを特徴とするミシンの糸調子装置。2. A main thread tensioner which requires a low tension on the upper thread in advance on the upstream side to apply tension, and applies a tension to the upper thread to adjust the thread tension during sewing. A first auxiliary thread tensioner capable of applying a first tension to the upper thread and a second auxiliary thread tensioner capable of imparting a second tension to the upper thread upstream of the thread tensioner; and the main thread tensioner at an arbitrary timing. Tension releasing means capable of releasing tension application by the first sub-thread tensioner, and switching the state of the first auxiliary thread tensioner from the tension application state to the tension application release state at an arbitrary timing; A thread tension device for a sewing machine, comprising: switching means capable of switching a state from a tension applied state to a tension applied state.
態を張力付与の状態と張力付与解除の状態との間で切り
換える第１作動部と、 第２方向に往復動することで前記第２の副糸調子器の状
態を張力付与の状態と張力付与解除の状態との間で切り
換える第２作動部と、 可動部を有し該可動部を往復駆動可能な駆動手段と、 前記可動部の往復動を伝達して、前記第１作動部を前記
第１方向に往復動させると共に前記第２作動部を前記第
２方向と逆に往復動させるリンクとを備えていることを
特徴とする請求項２記載のミシンの糸調子装置。3. A first actuating section for switching the state of the first auxiliary thread tensioner between a tension applying state and a tension releasing state by reciprocating in a first direction. A second operating part for switching the state of the second auxiliary thread tensioner between a state of applying tension and a state of releasing tension by reciprocating in a second direction; A reciprocating means for transmitting reciprocating motion of the movable part, reciprocating the first operating part in the first direction, and reciprocating the second operating part in the opposite direction to the second direction. 3. The thread tension device for a sewing machine according to claim 2, further comprising a link for causing the thread tension of the sewing machine.
切断処理時に、前記張力解除手段による解除、並びに、
前記切換手段による切り換えを実行させる制御手段を備
えたことを特徴とする請求項１〜３の何れかに記載のミ
シンの糸調子装置。4. When the thread is cut by an automatic thread cutting device provided in a sewing machine, the tension is released by the tension releasing means, and
The thread tension device for a sewing machine according to any one of claims 1 to 3, further comprising control means for executing switching by the switching means.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05361498A JP4010629B2 (en) | 1998-03-05 | 1998-03-05 | Sewing thread tension device |
| CN 99103614 CN1109786C (en) | 1998-03-05 | 1999-03-05 | Thread-clamping device for sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05361498A JP4010629B2 (en) | 1998-03-05 | 1998-03-05 | Sewing thread tension device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11244565A true JPH11244565A (en) | 1999-09-14 |
| JP4010629B2 JP4010629B2 (en) | 2007-11-21 |
Family
ID=12947790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05361498A Expired - Fee Related JP4010629B2 (en) | 1998-03-05 | 1998-03-05 | Sewing thread tension device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4010629B2 (en) |
| CN (1) | CN1109786C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005103260A (en) * | 2003-09-27 | 2005-04-21 | Duerkopp Adler Ag | Thread tensioner for sewing machine |
| JP2006346095A (en) * | 2005-06-15 | 2006-12-28 | Juki Corp | Sewing machine |
| KR100735896B1 (en) * | 2003-12-29 | 2007-07-04 | 야마토 미싱 세이조 가부시키가이샤 | Thread end portion treating device of zigzag sewing machine |
| KR20120016531A (en) * | 2010-08-16 | 2012-02-24 | 코오롱인더스트리 주식회사 | Apparatus for sewing airbag cushion |
| KR20120016528A (en) * | 2010-08-16 | 2012-02-24 | 코오롱인더스트리 주식회사 | Apparatus for sewing airbag cushion |
| CN111172678A (en) * | 2018-11-09 | 2020-05-19 | Juki株式会社 | Staggered sewing machine |
| CN113699707A (en) * | 2020-05-20 | 2021-11-26 | 浙江多乐缝纫机有限公司 | Thread clamping structure, sewing machine and control method of sewing machine |
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| CN101225586B (en) * | 2008-02-02 | 2011-12-07 | 杭州经纬电子机械制造股份有限公司 | Top thread gripper mechanism used for embroidery machine |
| JP2012065965A (en) * | 2010-09-27 | 2012-04-05 | Brother Ind Ltd | Sewing machine and method for controlling sewing machine |
| CN103290625B (en) * | 2012-02-28 | 2017-03-01 | 顾飞龙 | The method of overseam sewing machine amount of saving the thread when trimming |
| CN102747542A (en) * | 2012-06-20 | 2012-10-24 | 吴江市隆泰喷织厂 | Stable thread tensioning device of sewing machine |
| CN106988038A (en) * | 2016-01-20 | 2017-07-28 | 天津宝盈电脑机械有限公司 | One kind automatically adjusts tension force of facial suture device |
| KR102574713B1 (en) * | 2019-03-14 | 2023-09-06 | 엔에스디 가부시끼가이샤 | sewing machine |
| JP7316070B2 (en) * | 2019-03-15 | 2023-07-27 | Juki株式会社 | sewing machine |
| CN116536858B (en) * | 2022-12-19 | 2024-01-23 | 上海富山精密机械科技有限公司 | Wire tension self-balancing device, self-balancing method and application thereof |
-
1998
- 1998-03-05 JP JP05361498A patent/JP4010629B2/en not_active Expired - Fee Related
-
1999
- 1999-03-05 CN CN 99103614 patent/CN1109786C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005103260A (en) * | 2003-09-27 | 2005-04-21 | Duerkopp Adler Ag | Thread tensioner for sewing machine |
| KR100735896B1 (en) * | 2003-12-29 | 2007-07-04 | 야마토 미싱 세이조 가부시키가이샤 | Thread end portion treating device of zigzag sewing machine |
| JP2006346095A (en) * | 2005-06-15 | 2006-12-28 | Juki Corp | Sewing machine |
| KR20120016531A (en) * | 2010-08-16 | 2012-02-24 | 코오롱인더스트리 주식회사 | Apparatus for sewing airbag cushion |
| KR20120016528A (en) * | 2010-08-16 | 2012-02-24 | 코오롱인더스트리 주식회사 | Apparatus for sewing airbag cushion |
| CN111172678A (en) * | 2018-11-09 | 2020-05-19 | Juki株式会社 | Staggered sewing machine |
| CN111172678B (en) * | 2018-11-09 | 2024-03-01 | Juki株式会社 | Staggered sewing machine |
| CN113699707A (en) * | 2020-05-20 | 2021-11-26 | 浙江多乐缝纫机有限公司 | Thread clamping structure, sewing machine and control method of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4010629B2 (en) | 2007-11-21 |
| CN1232895A (en) | 1999-10-27 |
| CN1109786C (en) | 2003-05-28 |
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