JPH10192582A - Thread dispensing method in sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify thread dispensing at the and of sewing works in a multi- thread chain stitch sewing machine and facilitate the dispense of the stitch at the sewing end point, by manipulating a letting-out device of thread after a tread-adjusting device has been loosened after a sewing work to send out a thread needle and cutting an appropriate position of the thread by a cutter. SOLUTION: When a sewing machine is driven, stitches are formed at both front and rear faces of a sewing cloth 5 by cooperation of needles 1, 2 in which threads are inserted respectively and multi-thread chain stitch looper 8. When the sewing work has come to an end, the sewing machine is stopped at the dead point of the needle positioned upward (in this state, the thread 9, 10 of the needle are caught by the multi-thread chain stitch looper 8). Then, the treads 9, 10 are released by manipulating thread-adjusting device 3, 4 and the thread 9, 10 are drawn by an appropriate length by manipulating a letting-out device 12 of thread to rotate the letting-out lever 14 and secure a sufficient length of the left thread of the needle for the next sewing work. And then, the thread is cut off above the sewing cloth 5 by the cutter provided at the cloth-pressing leg 7. Thereafter, the sewing cloth 5 is drawn out and the looper- thread 11 is cut off.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は２重環ミシンにおけ
る縫製終了時の糸処理方法に関するものであり、詳しく
は縫い目糸のほつれを防止した糸処理方法に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread processing method at the end of sewing in a double-ring sewing machine, and more particularly to a thread processing method for preventing fraying of a stitch thread.

【０００２】[0002]

【従来の技術】従来の２重環ミシンの縫い目形成のため
の運動機構及び縫製終了時の糸処理方法について、図９
乃至図１１を参照して以下に説明する。図９は従来の２
重環ミシンの縫い目形成のための運動機構であり、図１
０，１１は従来の２重環ミシンにおける縫製終了時の糸
処理方法による縫い目を示すものである。2. Description of the Related Art FIG. 9 shows a conventional motion mechanism for forming a stitch of a double-ring sewing machine and a thread processing method at the end of sewing.
This will be described below with reference to FIGS. FIG.
FIG. 1 shows a movement mechanism for forming a seam of a heavy-ring sewing machine.
Reference numerals 0 and 11 indicate stitches by the thread processing method at the end of sewing in the conventional double-ring sewing machine.

【０００３】従来の２重環ミシンの縫い目形成のための
運動機構は針２１（左側）の先端が針板２２の上面より
上方にある時は２重環用のルーパ２３が針糸２４を捕捉
中であり、また該ルーパより針糸２４が抜けている時は
針２１の先端が針板２２の上面より下方にある（図９参
照）。なお、２５は右側の針、２６は糸調子器、２７は
布押さえ足、２８は被縫製布、２９は２重環用のルーパ
糸である。そのため従来の２重環ミシンにおける縫製終
了時の被縫製布の取り出しと糸の始末は非常に煩雑とな
り、概ね以下の通りである（図１０〜図１１参照）。[0003] A conventional motion mechanism for forming a stitch on a double-ring sewing machine is such that when the tip of the needle 21 (left side) is located above the upper surface of the needle plate 22, the looper 23 for the double ring catches the needle thread 24. When the needle thread 24 is pulled out from the looper, the tip of the needle 21 is below the upper surface of the needle plate 22 (see FIG. 9). 25 is a right needle, 26 is a thread tensioner, 27 is a cloth presser foot, 28 is a sewn cloth, and 29 is a looper thread for a double ring. Therefore, the removal of the sewing cloth and the disposition of the thread at the end of sewing in the conventional double-ring sewing machine become very complicated, and are generally as follows (see FIGS. 10 to 11).

【０００４】縫い終わり時にはミシンを針上死点の位置
で停止させ（上記の通り針の先端が針板より上方にある
位相では針糸が２重環用のルーパに捕捉されているの
で）、次にミシンを半回転させて針を下死点の位置で停
め（針が布に突き刺さり、針糸が２重環ルーパより解放
されている状態）。次にミシンを逆に半回転させながら
針上死点で停止させる（２重環ルーパから針糸が解放さ
れ且つ針が布から抜けて最も離れた状態）と、針糸２４
が２重環用のルーパ２３から解放されているので、糸調
子器２６の押圧の解除操作をして針糸２４を開放させれ
ば被縫製布２８を取り出すことが出来る。At the end of sewing, the sewing machine is stopped at the position of the top dead center of the needle (as described above, in the phase where the tip of the needle is above the needle plate, the needle thread is captured by the double loop looper), Next, the sewing machine is rotated half a turn to stop the needle at the position of the bottom dead center (a state in which the needle pierces the cloth and the needle thread is released from the double loop looper). Next, the sewing machine is stopped at the needle top dead center while rotating the sewing machine a half turn (in a state where the needle thread is released from the double loop looper and the needle comes off from the cloth and is furthest away).
Is released from the looper 23 for the double ring, and the sewing cloth 28 can be taken out by releasing the pressing of the thread tensioner 26 to release the needle thread 24.

【０００５】しかし、この様にミシンを逆に半回転させ
ねば被縫製布２８の取り出しが出来ない煩雑さを伴うこ
とと、ミシンを逆回転させたことに起因して布の引出し
の際に布上に施された最後の２〜３針の縫い目が必ずほ
どけ、布の扱いに注意しないと更にそれ以上の縫い目が
ほどける恐れがある。縫い目がほどけた跡は布上に針穴
３０が残るので縫製品としての価値を低下させる等の欠
点を有するものである。However, if the sewing machine is not rotated half a turn in the reverse direction, the sewing cloth 28 cannot be taken out of the sewing machine, and it is difficult to take out the cloth due to the reverse rotation of the sewing machine. The last two or three stitches provided on the upper part may be unraveled, and further care may be required if the cloth is not carefully handled. Traces of unsealing have disadvantages such as a decrease in the value as a sewn product because the needle holes 30 remain on the cloth.

【０００６】[0006]

【発明が解決しようとする課題】本発明の目的は、２重
環ミシンにおける縫製終了時の糸処理方法を簡単にする
と共に縫い終わり部の縫い目がほどける事がなく、従っ
て被縫製品に針の刺さった痕跡を残さぬ品質のものを提
供できるようにするものである。SUMMARY OF THE INVENTION It is an object of the present invention to simplify a thread processing method at the end of sewing in a double-ring sewing machine and to prevent the seam at the end of sewing from being unraveled. It is possible to provide a product with a quality that does not leave traces pierced.

【０００７】[0007]

【課題を解決するための手段】本発明はミシン機枠上に
ほぼ水平状に針板が設けられ、該針板の上方にて上下方
向の往復運動が可能に針棒が支持され、前記針板の下方
にて円弧状の往復運動が可能にルーパが支持され、該ル
ーパと前記針棒の端部に固着される針とで２重環の縫製
を行う２重環ミシンにおいて、縫製の終了時にはミシン
を針棒上死点位置にて停止させ、針糸の為の糸調子装置
を弛めた後前記針板の上方に設けた糸繰り出し装置を操
作して被縫製布に連接する針糸を繰り出し、該繰り出さ
れた針糸の適宜の箇所を切断し、布押さえ具を上昇させ
た後被縫製布を引き出すと共に該引出し動作によって被
縫製布上の最終縫い目の針糸の一部を布下側に移動さ
せ、被縫製布に連接するルーパ糸を切断する縫製終了時
の糸処理方法を提供することにより解決されるものであ
る。本発明は上記の方法を提供することにより、従来、
２重環ミシンにより縫われた被縫製布の縫製終了時に行
っていた糸処理方法、即ち、ミシンを先ず針上死点位置
にて停止させ、次にミシンを半回転手で回し、次いでミ
シンを逆方向に半回転手で回し、その後布押さえ具を上
げて被縫製布を引出し、次いで被縫製布に連接する布上
側の針糸及び布下側のルーパ糸を切断する非常に煩雑な
方法を行わなくても済むと共に従来の方法では最終縫い
目を含む２〜３の縫い目が必ず解けて、その為縫い目跡
を残して商品価値を低下させる欠点を有していたが、そ
の欠点を除去することができるものである。そして、２
重環ミシンにおける縫製終了時の糸処理方法を簡単にす
ると共に縫い終わり部の縫い目がほどける事がなく、従
って被縫製品に針の刺さった痕跡を残さぬ品質のものの
提供を可能にするものである。According to the present invention, a needle plate is provided substantially horizontally on a sewing machine frame, and a needle bar is supported above the needle plate so as to be capable of reciprocating up and down. In a double-ring sewing machine in which a looper is supported below the plate so as to be capable of reciprocating motion in an arc shape, and the looper and a needle fixed to an end of the needle bar perform double-ring sewing. Sometimes, the sewing machine is stopped at the needle bar top dead center position, the thread tension device for the needle thread is loosened, and then the thread feeder provided above the needle plate is operated to connect the needle thread to the cloth to be sewn. Then, an appropriate portion of the fed needle thread is cut off, the cloth presser is raised, and then the cloth to be sewn is pulled out. Side, and cuts the looper thread connected to the fabric to be sewn. It is intended to be solved by the Rukoto. The present invention provides a method as described above,
The thread processing method performed at the end of sewing of the sewn cloth sewn by the double-ring sewing machine, that is, the sewing machine is first stopped at the needle top dead center position, and then the sewing machine is turned by a half-turn hand, and then the sewing machine is rotated. Turn by a half-turn in the opposite direction, then raise the cloth holder, pull out the sewing cloth, and then perform a very complicated method of cutting the needle thread on the upper side of the cloth and the looper thread on the lower side of the cloth connected to the sewing cloth. In the conventional method, a few stitches including the final stitch can be surely unwound, and the conventional method has a disadvantage that the seam mark is left and the commercial value is reduced. You can do it. And 2
A method of simplifying the thread processing method at the end of sewing in a heavy-ring sewing machine, and the seam at the end of sewing is not unraveled, so that it is possible to provide a quality product that does not leave traces of needles stuck on products to be sewn. It is.

【０００８】[0008]

【発明の実施の形態】本発明の一実施の形態例を図１〜
図８を参照して以下に詳しく説明する。図１は本発明の
一実施の形態例の要部の正面図であり、図２乃至図３は
本発明の一実施の形態例の糸処理状態を示す側面図であ
り、図４〜図５は本発明の一実施の形態例に基づく糸処
理を行った被縫製布の縫い目を示す正面図であり、図６
は本発明の他の実施の形態例を示す側面図であり、図７
は本発明の更に他の実施の形態例を示す側面図であり、
図８は図７に示す実施の形態例の要部を示す平面図であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
This will be described in detail below with reference to FIG. FIG. 1 is a front view of a main part of an embodiment of the present invention, and FIGS. 2 and 3 are side views showing a yarn processing state of the embodiment of the present invention. FIG. 6 is a front view showing a seam of the sewn cloth which has been subjected to the thread processing according to the embodiment of the present invention.
FIG. 7 is a side view showing another embodiment of the present invention, and FIG.
Is a side view showing still another embodiment of the present invention,
FIG. 8 is a plan view showing a main part of the embodiment shown in FIG.

【０００９】ミシンの機枠には駆動軸（図示せず）が回
転可能に支持されており、該駆動軸の回転により針棒
（図示せず）が上下方向に往復運動する。該針棒の一端
に左側の針１と右側の針２とが着脱自在に装着されてい
る。前記機枠の適宜の箇所には複数の糸巻き部を装着す
るスタンド（いずれも図示せず）と２個の糸調子装置
（左側）３、（右側）４が設けられている。A drive shaft (not shown) is rotatably supported by the machine frame of the sewing machine, and a needle bar (not shown) reciprocates in the vertical direction by rotation of the drive shaft. A needle 1 on the left and a needle 2 on the right are detachably mounted on one end of the needle bar. A stand (all not shown) for mounting a plurality of thread winding units and two thread tension devices (left side) 3 and (right side) 4 are provided at appropriate locations on the machine frame.

【００１０】前記針棒の下方に配設のミシンの機枠には
被縫製布５を載置し且つ滑らせるための針板６が固定さ
れている。該針板の上方には布押さえ足７が上下動可能
に支持され、前記被縫製布５を針板に押圧する。又、針
板６の下方には前記駆動軸の回転に連動して揺動運動す
る２重環ルーパ８が支持されている。前記糸巻き部の糸
９，１０，１１はそれぞれ前記糸調子器３，４…を通っ
て前記針１，２及び２重環用のルーパ８のそれぞれの先
端に形成された針穴に導かれる。A needle plate 6 for mounting and sliding the cloth 5 to be sewn is fixed to the machine frame of the sewing machine provided below the needle bar. Above the needle plate, a cloth presser foot 7 is supported so as to be vertically movable, and presses the sewn cloth 5 against the needle plate. A double ring looper 8 that swings in conjunction with the rotation of the drive shaft is supported below the needle plate 6. The yarns 9, 10, 11 of the yarn winding section pass through the thread tensioners 3, 4,... Respectively, and are guided to needle holes formed at the tips of the needles 1, 2, and the looper 8 for a double ring.

【００１１】前記針板６の上方の適宜の箇所には針糸繰
り出し装置１２が設けられている。該針糸繰り出し装置
は先端に屈曲部１３が形成された繰り出しレバー１４を
支軸１５を中心に回動自在に支持したものであり、該繰
り出しレバーの屈曲部は上死点に停止中の針１，２の先
端の下方を払う如くに配置されている。At an appropriate place above the needle plate 6, a needle thread feeding device 12 is provided. The needle thread feeding device supports a feeding lever 14 having a bent portion 13 formed at the tip thereof so as to be rotatable around a support shaft 15. The bent portion of the feeding lever is a needle stopped at a top dead center. It is arranged so that the lower part of the tip of 1, 2 may be swept away.

【００１２】一実施の形態例の構造は以上の如きである
から、ミシンが運転されるとそれぞれ糸が通された前記
針１，２及び２重環ルーパ８の協働により被縫製布５の
表裏に図４及び図５に示される如き縫い目が形成され
る。Since the structure of the embodiment is as described above, when the sewing machine is operated, the needles 1 and 2 and the double loop looper 8 through which the thread is passed respectively cooperate to form the cloth 5 to be sewn. A seam as shown in FIGS. 4 and 5 is formed on both sides.

【００１３】次に、上記一実施の形態例の縫い終わり時
の糸処理方法に付いて説明する。縫い終わったら、ミシ
ンを針上死点の位置で停止させる（この状態では針糸
９，１０が２重環ルーパに捕捉されている）。次に、糸
調子器３，４を操作し、針糸９，１０を解放する。次
に、前記糸繰り出し装置１２を操作し、該装置の繰り出
しレバー１４を回動させて（図２参照）針糸９，１０を
供給側から適宜の長さだけ引き出して、針糸の残糸の長
さを次の縫製に十分なだけ確保して布押さえ足７に設け
られた刃具１６にて針糸９，１０を被縫製布５の上方で
切断する。次に、布押さえ足７を上昇させてから被縫製
布５を針の下側に置かれた位置から引出すと、この引出
し動作によって布側に残った針糸は布表より布裏に移動
され、且つ２重環ルーパー糸１１が引出されて糸結び及
び次の縫製へのルーパ糸残糸が確保されるので、ここで
２重環用のルーパ糸１１を刃具１６にて切断する。Next, a description will be given of a thread processing method at the end of sewing according to the embodiment. When the sewing is completed, the sewing machine is stopped at the position of the top dead center of the needle (in this state, the needle threads 9 and 10 are captured by the double loop looper). Next, the thread tensioners 3, 4 are operated to release the needle threads 9, 10. Next, the yarn feeding device 12 is operated, and the feeding lever 14 of the device is rotated (see FIG. 2) to pull out the needle yarns 9 and 10 from the supply side by an appropriate length, and the remaining yarn of the needle yarn is The needle threads 9 and 10 are cut above the cloth 5 to be sewn by the blade 16 provided on the cloth presser foot 7 while ensuring the length sufficient for the next sewing. Next, when the cloth presser foot 7 is raised and the cloth 5 to be sewn is pulled out from the position below the needle, the needle thread remaining on the cloth side is moved from the cloth front to the cloth back by this drawing operation. In addition, the double looper thread 11 is pulled out to secure the thread knot and the looper thread remaining thread for the next sewing. Therefore, the looper thread 11 for the double loop is cut by the cutting tool 16.

【００１４】本実施の形態例では、縫い終わった状態に
て針糸９，１０が糸調子装置の弛め操作されたあと糸繰
り出し装置で残糸を確保されて切断され、この後で被縫
製布が針下位置から引き出される際に、布側に残る針糸
が布表より布裏に移動して布裏にて糸結びが行われると
共にルーパ糸残糸を確保されて切断されるので、縫い終
わり側端部の縫い目は確実に形成され縫い目のほどけが
防止される。（図４及び図５参照）In this embodiment, after the needle thread 9, 10 has been loosened by the thread tension device in a state where the sewing has been completed, the remaining thread is secured and cut by the thread feeding device, and thereafter, the sewing is performed. When the cloth is pulled out from the needle lower position, the needle thread remaining on the cloth side moves from the cloth front to the back of the cloth, the yarn is tied at the back of the cloth, and the looper yarn remaining thread is secured and cut, The seam at the end of the seam end is securely formed, and the seam is prevented from being unraveled. (See FIGS. 4 and 5)

【００１５】本発明の他の実施の形態例について（図６
参照）以下に説明する。但し前述した実施の形態例と共
通する部分の構造についての説明は重複するので省略す
る。糸繰り出し装置１２の糸繰り出しレバー１４を支持
する支軸１５には回動板１７が設けられている。該回動
板はロータリソレノイド１８と連結板１９を介して連結
されているので、スイッチ操作されるロータリソレノイ
ド１８の作動により回動され、糸繰り出しレバー１４を
回動する。この実施の形態例は以上の如き構造であるか
ら、縫い終わり時に糸繰り出しの為のスイッチ操作をす
ることにより、針糸９，１０が糸繰り出し装置により糸
繰り出し作業が自動的に行われる。Another embodiment of the present invention (FIG. 6)
See below. However, the description of the structure of the portion common to the above-described embodiment will be omitted because it is redundant. A rotating plate 17 is provided on a support shaft 15 that supports the yarn feeding lever 14 of the yarn feeding device 12. Since the rotary plate is connected to the rotary solenoid 18 via the connecting plate 19, the rotary plate is rotated by the operation of the rotary solenoid 18 operated by the switch, and the line feed lever 14 is rotated. Since this embodiment has the above-described structure, a thread feeding operation of the needle threads 9 and 10 is automatically performed by the thread feeding device by performing a switch operation for thread feeding at the end of sewing.

【００１６】本発明の更に他の実施の形態例について
（図７〜図８）以下に説明する。但し前述した実施の形
態例と共通する部分の構造についての説明は重複するの
で省略する。前記布押さえ足７の上面には支軸２１によ
り刃具１６ａが回動可能に支持されており、該刃具は支
軸２１上に装着のバネ部材により図８の矢印方向に付勢
されている。刃具２１の後端部には刃具と一体的に形成
された回動腕部２２が設けられていて、該回動腕部に回
動力が作用すると刃具１６ａはバネ力に抗して回動され
る。ミシン機枠の適宜の箇所にはロータリソレノイド２
３が設けられており、該ロータリソレノイドにはソレノ
イドの運動を伝達する二股回動腕２４が設けられてい
る。該二股回動腕の端部に形成された二股部２５は前記
刃具１６の回動腕部２２を挟持する如くに係合する。こ
の実施の形態例は以上の如き構造であるから、針糸の切
断時に切断の為のスイッチ操作をすることにより、前記
ロータリソレノイド２３が駆動されて刃具１６ａを回動
するので、該刃具による針糸の切断作業が自動的に行わ
れる。Another embodiment of the present invention (FIGS. 7 and 8) will be described below. However, the description of the structure of the portion common to the above-described embodiment will be omitted because it is redundant. The blade 16a is rotatably supported on the upper surface of the cloth presser foot 7 by a spindle 21. The blade 16 is urged in the direction of the arrow in FIG. A turning arm 22 formed integrally with the blade is provided at the rear end of the blade 21. When a turning force acts on the turning arm, the blade 16a is turned against the spring force. You. Rotary solenoid 2 is installed at an appropriate location on the sewing machine frame.
The rotary solenoid is provided with a fork-rotating arm 24 for transmitting the movement of the solenoid. A forked portion 25 formed at an end of the forked rotating arm is engaged so as to sandwich the rotating arm 22 of the cutting tool 16. Since this embodiment has the above-described structure, the rotary solenoid 23 is driven to rotate the cutting tool 16a by operating a switch for cutting when cutting the needle thread. The thread cutting operation is performed automatically.

【００１７】本発明の実施の形態例のミシンにおける縫
製終了時の糸処理方法は以上の通りであるから、ミシン
機枠上にほぼ水平状に針板６が設けられ、該針板の上方
にて上下方向の往復運動を可能に針棒が支持され、前記
針板６の下方にて円弧状の往復運動を可能にルーパ８が
支持され、該ルーパと前記針棒の端部に固着される針
１，２とで前記針板６の上に載置される被縫製布５に２
重環の縫製を行う２重環ミシンにおいて、縫製の終了時
にはミシンを針棒上死点位置にて停止させ、次に針糸
９，１０の為の糸調子装置３，４を弛めた後前記針板６
の上方の機枠の適宜の位置に設けた糸繰り出し装置１２
を操作して被縫製布に連接する針糸を繰り出し、該繰り
出された針糸の適宜の箇所を針糸切断装置にて切断し、
次に布押さえ足７を上昇させた後被縫製布５を針板６上
から引き出すと共に該被縫製布上の最終縫い目の針糸の
一部を布下側に移動させ、次に被縫製布５に連接するル
ーパ糸を切断することで糸処理を終えることができるか
ら、糸処理を非常に簡単に済ませることができると共に
最終縫い目部にほつれが発生しないようにしたものであ
る。更に本発明の他の実施の形態例を糸処理に使用すれ
ば、糸処理の一部が自動的に行うことができるので糸処
理が一層簡単に且つ迅速に行うことができる。Since the thread processing method at the end of sewing in the sewing machine according to the embodiment of the present invention is as described above, the needle plate 6 is provided substantially horizontally on the sewing machine frame, and the needle plate 6 is provided above the needle plate. The needle bar is supported so as to be able to reciprocate up and down, and a looper 8 is supported below the needle plate 6 so as to be able to reciprocate in an arc shape, and is fixed to the looper and the end of the needle bar. The sewing cloth 5 placed on the needle plate 6 with the needles 1 and 2
In a double-ring sewing machine for sewing a heavy chain, at the end of sewing, the sewing machine is stopped at the needle bar top dead center position, and then the thread tension devices 3, 4 for the needle threads 9, 10 are loosened. The needle plate 6
Yarn feeding device 12 provided at an appropriate position on the machine frame above
Is operated to feed out the needle thread connected to the cloth to be sewn, and an appropriate portion of the fed-out needle thread is cut by a needle thread cutting device,
Next, after the cloth presser foot 7 is raised, the sewing cloth 5 is pulled out from the needle plate 6 and a part of the needle thread of the final seam on the sewing cloth is moved to the lower side of the cloth. Since the thread processing can be completed by cutting the looper thread connected to the thread, the thread processing can be completed very easily and the final seam portion is prevented from fraying. Furthermore, if another embodiment of the present invention is used for yarn processing, a part of the yarn processing can be automatically performed, so that the yarn processing can be performed more easily and quickly.

【００１８】[0018]

【発明の効果】以上説明した如く本発明のミシンにおけ
る縫製終了時の糸処理方法は以上の通りであるから、ミ
シン機枠上にほぼ水平状に針板が設けられ、該針板の上
方にて上下方向の往復運動を可能に針棒が支持され、前
記針板の下方にて円弧状の往復運動を可能にルーパが支
持され、該ルーパと前記針棒の端部に固着される針とで
前記針板の上に載置される被縫製布に２重環の縫製を行
う２重環ミシンにおいて、縫製の終了時にはミシンを針
棒上死点位置にて停止させ、次に針糸の為の糸調子装置
を弛めた後前記針板の上方の機枠の適宜の位置に設けた
糸繰り出し装置を操作して被縫製布に連接する針糸を繰
り出し、該繰り出された針糸の適宜の箇所を針糸切断装
置にて切断し、次に布押さえ足を上昇させた後被縫製布
を針板上から引き出すと共に該引出し動作により該被縫
製布上の最終縫い目の針糸の一部を布下側に移動させ、
次に被縫製布に連接するルーパ糸を切断することで糸処
理を終えることができるから、従来の糸処理方法に比べ
て糸処理を非常に簡単に済ませることができると共に最
終縫い目部にほつれが発生しないようにしたものであ
る。従って被縫製品に針の刺さった痕跡を残さぬ品質の
ものを提供できるので、生産の能率向上を図ることと、
商品の品質水準の向上に寄与することが可能となる効果
が大なるものである。As described above, the thread processing method at the end of sewing in the sewing machine of the present invention is as described above. Therefore, a needle plate is provided substantially horizontally on the sewing machine frame, and the needle plate is provided above the needle plate. The needle bar is supported so as to be capable of reciprocating movement in the up and down direction, and a looper is supported so as to be capable of reciprocating in an arc shape below the needle plate, and a needle fixed to an end of the looper and the needle bar. In the double-ring sewing machine for performing double-ring sewing on the sewn cloth placed on the needle plate, the sewing machine is stopped at the needle bar top dead center position at the end of sewing, and then the needle thread is After loosening the thread tension device, the thread feeding device provided at an appropriate position on the machine frame above the needle plate is operated to feed out the needle thread connected to the sewing cloth. Cut the appropriate part with the needle thread cutting device, then raise the cloth presser foot, and then pull the sewing cloth from above the needle plate. The portion of the needle thread of the last stitch on 該被 sewn cloth is moved to the fabric under side by the drawer work with to,
Next, the thread processing can be completed by cutting the looper thread connected to the cloth to be sewn, so that the thread processing can be completed very easily as compared with the conventional thread processing method, and the final seam portion is not frayed. It does not occur. Therefore, it is possible to provide a product that does not leave traces of needles stuck on the sewn product, so that production efficiency can be improved and
The effect that can contribute to the improvement of the quality level of the product is great.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施形態例を装着した要部の正面
図、FIG. 1 is a front view of a main part to which an embodiment of the present invention is attached.

【図２】本発明の一実施形態例の作動状態を示す要部の
正面図、FIG. 2 is a front view of a main part showing an operation state of the embodiment of the present invention,

【図３】本発明の一実施形態例の一状態を示す腰部の正
面図、FIG. 3 is a front view of a waist showing one state of an embodiment of the present invention;

【図４】本発明の一実施形態例による糸処理後の被縫製
布の表側の正面図、FIG. 4 is a front view of the front side of the sewn cloth after the yarn processing according to the embodiment of the present invention,

【図５】本発明の一実施形態例による糸処理後の被縫製
布の表裏両側を示す正面図、FIG. 5 is a front view showing the front and back sides of the sewn cloth after the yarn processing according to the embodiment of the present invention;

【図６】本発明の他の実施形態例の作動状態を示す要部
の正面図、FIG. 6 is a front view of a main part showing an operation state of another embodiment of the present invention,

【図７】本発明の他の実施形態例を装着した要部の正面
図、FIG. 7 is a front view of a main part to which another embodiment of the present invention is mounted.

【図８】本発明の他の実施形態例を装着した要部の平面
図、FIG. 8 is a plan view of a main part in which another embodiment of the present invention is mounted.

【図９】従来実施形態例の要部の正面図、FIG. 9 is a front view of a main part of a conventional embodiment,

【図１０】従来実施形態例による糸処理後の被縫製布の
表側の正面図、FIG. 10 is a front view of the front side of the sewn cloth after the yarn processing according to the conventional embodiment,

【図１１】従来実施形態例による糸処理後の被縫製布の
表裏両側を示す正面図、FIG. 11 is a front view showing both front and back sides of a sewn cloth after thread processing according to a conventional embodiment;

【符号の説明】[Explanation of symbols]

１，２……針 ３，４……糸調子装置 ５……被縫製布 ６……針板 ７……布押さえ足 ８……ルーパ ９，１０……針糸 １１……ルーパ糸 １２…糸繰り出し装置 １６，１６ａ…刃具 1, 2, needle 3, 4 thread tension device 5, sewing cloth 6, needle plate 7, cloth presser foot 8, looper 9, 10, needle thread 11, looper thread 12, thread Feeding device 16, 16a ... cutting tool

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】ミシン機枠上にほぼ水平状に針板が設けら
れ、該針板の上方にて上下方向の往復運動を可能に針棒
が支持され、前記針板の下方にて円弧状の往復運動を可
能にルーパが支持され、該ルーパと前記針棒の端部に固
着される針とで前記針板の上に載置される被縫製布に２
重環の縫製を行う２重環ミシンにおいて、縫製の終了時
にはミシンを針棒上死点位置にて停止させるステップ
と、次に針糸の為の糸調子装置を弛めるステップと、そ
の後前記針板の上方の機枠の適宜の位置に設けた糸繰り
出し装置を操作して被縫製布に連接する針糸を繰り出す
ステップと、該繰り出された針糸の適宜の箇所を切断す
るステップと、次に布押さえ具を上昇させるステップ
と、その後被縫製布を引き出すと共に該引出し動作によ
って被縫製布上の最終縫い目の針糸の一部を布下側に移
動させるステップと、次に被縫製布に連接するルーパ糸
を切断するステップとからなることを特徴とするミシン
における糸処理方法。A needle plate is provided substantially horizontally on a sewing machine frame, a needle bar is supported above the needle plate so as to be capable of reciprocating up and down, and an arc shape is formed below the needle plate. A looper is supported so as to be able to reciprocate, and the looper and a needle fixed to the end of the needle bar are used to sew cloth on the needle plate.
In a double-ring sewing machine that performs sewing of a heavy ring, a step of stopping the sewing machine at a needle bar top dead center position at the end of sewing, a step of loosening a thread tension device for a needle thread, and then the needle plate Operating the thread feeding device provided at an appropriate position of the machine frame above to feed out the needle thread connected to the sewing cloth; cutting an appropriate portion of the fed needle thread; and Raising the cloth presser; pulling out the cloth to be sewn and moving a part of the needle thread of the final seam on the cloth to be sewn by the pulling-out operation to the lower side of the cloth; and then connecting to the cloth to be sewn Cutting the looper thread.