JPH06154457A - Empty ring revering mechanism of fringe overlock machine - Google Patents
Empty ring revering mechanism of fringe overlock machineInfo
- Publication number
- JPH06154457A JPH06154457A JP30555592A JP30555592A JPH06154457A JP H06154457 A JPH06154457 A JP H06154457A JP 30555592 A JP30555592 A JP 30555592A JP 30555592 A JP30555592 A JP 30555592A JP H06154457 A JPH06154457 A JP H06154457A
- Authority
- JP
- Japan
- Prior art keywords
- empty ring
- ring
- air
- sewing
- empty
- 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]
【産業上の利用分野】本発明は、縁かがり縫いミシンの
空環返し縫い装置に係り、特に前順位の縫製生地から切
断された遊離状空環を次順位の縫製生地の始端に縫い込
む際の返し縫い不良をなくし、常に良好な返し縫いを行
なうことができる縁かがり縫いミシンの空環返し縫い装
置を提供することにある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an empty loop reverse stitching device of an overedge stitch sewing machine, and more particularly, when a free empty ring cut from a sewing material of a preceding order is sewn to a starting end of a sewing material of a next order. It is an object of the present invention to provide an empty chain reverse stitching device for an overlock stitch sewing machine that can always perform good reverse stitches without eliminating reverse stitching defects.
【０００２】[0002]
【従来の技術】縫製生地の縫い始め部分のほつれを防止
するために、前順位の縫製生地から切断された遊離状空
環を次順位の縫製生地の縫製開始縫目中に縫い込む、返
し縫い装置を備えた縁かがり縫いミシンは種々開示され
ている。しかしながら、このような従来の空環返し縫い
装置には、縫い始めにおいて、生地端がカールするとい
う問題があり、これを回避しようとすると、空環が当該
縫製開始生地端から突出したり、上ルーパ糸のテンショ
ンが緩んだりして不良縫いが生じ、風合のよい返し縫い
（以下、バックタック縫製ということがある）ができな
いという問題があった。2. Description of the Related Art In order to prevent fraying of a sewing start portion of a sewing material, a free empty ring cut from a sewing material of a preceding order is sewn into a sewing start stitch of a sewing material of a next order and a reverse stitching device. Various overedger sewing machines provided with are disclosed. However, such a conventional empty loop reverse stitching device has a problem that the material end is curled at the beginning of sewing, and when it is attempted to avoid this, the empty ring projects from the sewing start material end or the upper looper thread is sewn. There was a problem in that the reverse stitching with a good texture (hereinafter sometimes referred to as backtack sewing) cannot be performed due to the looseness of the tension and defective sewing.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、上記
従来技術の問題点を解決し、空環を押え金の裏面でガイ
ドして次順位生地に縫い込むことにより、縫製不良をな
くし、風合の良好なバックタック縫製をすることができ
る縁かがり縫いミシンの空環返し縫い装置を提供するこ
とにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and eliminate the defective sewing by guiding the empty ring with the back surface of the presser foot and sewing it into the next-order fabric. It is an object of the present invention to provide an empty chain reverse stitching device of an overedge stitch sewing machine which can perform back tack sewing with a good texture.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
本発明は、空環を、次順位の生地の適正位置に縫い込む
縁かがり縫いミシンに設けられた空環切り装置と、縫い
終わりの空環長さを調整するカウンタ装置と、空環を縫
い位置へ導いて安定させるガイド部を有する押え金と、
該押え金の上部に設けられ、空環縫い込み長さを定める
前エアノズルと、前記空環切り装置で所定の長さに切断
された空環を吸引する空環吸込管と、該空環吸込管に吸
引された空環を押圧・固定する空環押え片を備えた空環
押えシリンダと、ミシン停止信号により、前記空環吸込
管を揺動させ、針落ちに対して前進または後退させる第
１空環吸込管駆動用エアシリンダと、前記空環吸込管の
前進、後退位置の中間位置を設定する第２空環吸込管駆
動用エアシリンダと、該第１空環吸込管駆動用エアシリ
ンダと第２空環吸込管駆動用エアシリンダを連結する連
結軸と、該連結軸に設けられ、前記空環吸込管の停止位
置を調節する位置調節ボルトと、縫製運針数とミシンの
回転を定め、空環縫い込み縫製終了後、前記空環押え片
の押圧を解除する一定速カウンタ装置と、前記空環切り
装置および空環吸込管にそれぞれ連結されたチューブ内
のエア圧力を正圧から負圧に変換する二つのベンチュリ
ー装置と、該ベンチュリー装置からのエアの流通経路を
遮断し、エアを前記空環切り装置へ逆流させるエア吹き
返しバルブと、該エア吹き返しバルブの開閉を司るエア
吹き返しソレノイドとを有する縁かがり縫いミシンの空
環返し縫い装置において、前記押え金が、押え本体に固
定された押え爪を有し、該押え爪の裏面に空環を縫い位
置で安定させる溝を設けるとともに、表面に空環を前記
裏面の溝に案内するガイド部を設けたことを特徴とす
る。SUMMARY OF THE INVENTION To achieve the above object, the present invention provides an empty loop cutting device provided on an overlock stitch sewing machine for sewing an empty ring at an appropriate position of a fabric of the next order, and an empty loop cutting device for sewing. A counter device for adjusting the length of the hollow ring, and a presser foot having a guide portion for guiding and stabilizing the hollow ring to the sewing position,
A front air nozzle provided on an upper portion of the presser foot for determining an air ring sewing length, an air ring suction pipe for sucking the air ring cut into a predetermined length by the air ring cutting device, and the air ring suction An empty ring holding cylinder equipped with an empty ring pressing piece that presses and fixes the empty ring sucked into the tube, and the empty ring suction tube is swung by a sewing machine stop signal to move forward or backward with respect to the needle drop. 1. Air ring suction pipe driving air cylinder, second air ring suction pipe driving air cylinder for setting an intermediate position between forward and backward positions of the air ring suction pipe, and first air ring suction pipe driving air cylinder And a second air ring suction pipe driving air cylinder, a position adjusting bolt provided on the connection shaft for adjusting the stop position of the air ring suction pipe, the number of sewing needles and the rotation of the sewing machine. , After the completion of sewing of the empty ring sewing, release the pressing of the empty ring pressing piece. Constant-speed counter device, two venturi devices for converting the air pressure in the tubes respectively connected to the air ring cutting device and the air ring suction pipe from positive pressure to negative pressure, and a flow path of air from the venturi device In the empty ring reverse stitching device of the overlock stitch sewing machine, which has an air blowback valve that shuts off the air and causes the air to flow backward to the empty loopback device, and an air blowback solenoid that controls the opening and closing of the air blowback valve, the presser foot is A holding claw fixed to the main body, a groove for stabilizing the empty ring at the sewing position is provided on the back surface of the pressing claw, and a guide portion for guiding the empty ring to the groove on the back surface is provided on the front surface. And
【０００５】[0005]
【作用】押え金が、押え本体中央部に固定された押え爪
を有し、該押え爪の裏面に空環を縫い位置で安定させる
溝を設けるとともに、表面に前記空環を前記裏面の溝に
案内するガイド部を設けたことにより、縫製時の空環が
前記押え爪の表面のガイド部を経て裏面の溝に嵌入し、
押え金の裏面でガイドされることになり、空環と上ルー
パ糸とを接触させることなく縫製されるので、上ルーパ
糸のテンションの緩みが防止され、風合のよいバックタ
ック縫製が可能となる。The presser foot has a presser pawl fixed to the central portion of the presser body, and a groove for stabilizing the empty ring at the sewing position is provided on the back surface of the presser pawl, and the empty ring is provided on the front surface of the presser foot. By providing the guide portion for guiding to, the empty ring at the time of sewing fits into the groove on the back surface through the guide portion on the front surface of the pressing claw,
Since it is guided by the back surface of the presser foot and is sewn without making contact between the empty loop and the upper looper thread, loosening of the tension of the upper looper thread is prevented and back tack sewing with a good texture is possible. Become.
【０００６】図７は、本発明で使用される典型的な押え
金を示す斜視図である。図において、この押え金６は、
押え本体３６と、該押え本体３６の後端部に固定された
空環押え３７および中央部に固定された押え爪２８とか
ら構成されている。図８は、押え本体３６に固定される
押え爪２８の斜視図、図９は、図８のIX−IX線矢視方向
断面図である。図９において押え爪２８は、その裏面に
溝２８ｂを、また上面に傾斜面からなる空環ガイド部２
８ａを有している。このような構成の押え爪２８および
押え金６を有する本発明の縁かがり縫いミシンの空環返
し縫い装置において、例えば空環吸込装置によって縫い
方向と逆方向に引っ張られた空環２６は、図１０に示す
ように、押え爪２８の空環ガイド部２８ａの傾斜面を滑
り落ち、軌跡２６ａをたどって溝２８ｂに嵌入し、該溝
２８ｂでガイドされ、上ルーパ糸と接触することなく、
縫製生地３５の始端に縫着される。FIG. 7 is a perspective view showing a typical presser foot used in the present invention. In the figure, this presser foot 6 is
The pressing main body 36 includes an empty ring pressing member 37 fixed to the rear end of the pressing main body 36 and a pressing claw 28 fixed to the central portion. 8 is a perspective view of the presser pawl 28 fixed to the presser body 36, and FIG. 9 is a sectional view taken along the line IX-IX of FIG. In FIG. 9, the presser pawl 28 has a groove 28b on the back surface thereof and an inclined surface on the top surface of the air guide 2
8a. In the empty loop reverse stitching device of the overlock stitch sewing machine of the present invention having the presser pawl 28 and the presser foot 6 having such a structure, the empty ring 26 pulled in the direction opposite to the sewing direction by, for example, the empty ring suction device is shown in FIG. As shown in FIG. 5, it slides down the inclined surface of the hollow ring guide portion 28a of the presser pawl 28, fits into the groove 28b following the locus 26a, is guided by the groove 28b, and does not come into contact with the upper looper thread.
It is sewn to the starting end of the sewing material 35.
【０００７】[0007]
【実施例】次に、本発明を添付図面によりさらに詳細に
説明する。図１は、本発明の一実施例である縁かがり縫
いミシンの空環返し縫い装置の説明図、図２〜図６は、
図１の部分詳細図である。この装置は、縁かがり縫いミ
シン本体２４に設けられた空環切り装置１と、縫い終わ
りの空環の長さを調整するカウンタ装置の一部としての
受光器３および該受光器３の上方に配置され、受光器３
に光を投光し、該受光器３の明暗の変化により、縫製生
地の有無を検出する投光器１１と、空環を縫い位置へ導
いて安定させ、図示省略した布送り歯と協同して縫製生
地を送る押え金６と、該押え金６の上部に設けられ、空
環縫い込み長さを定める前エアノズル９と、前記空環切
り装置１で所定の長さに切断された空環を吸引する空環
吸込管７と、該空環吸込管７に吸引された空環を押圧・
固定する空環押え片２７（図３参照）を備えた空環押え
シリンダ２１と、ミシン停止信号の指令により、前記空
環吸込管７をロッド３０および回転軸２２を介して揺動
させ、針落ちに対して前進させたり、作業者側に後退さ
せたりする第１空環吸込管駆動用エアシリンダ２３と、
前記空環吸込管７の前進、後退の中間位置を設定する第
２空環吸込管駆動用エアシリンダ３１と、該第１空環吸
込管駆動用エアシリンダ２３と第２空環吸込管駆動用エ
アシリンダ３１を連結する連結軸３２と、該連結軸３２
に設けられた前記空環吸込管７の前進位置または後退位
置を調節する位置調節ボルト３３（図４参照）と、縫製
運針数とミシンの回転を定め、空環縫い込み縫製終了
後、前記空環押え片の押圧を解除する図示省略した一定
速カウンタ装置と、前記空環切り装置１および空環吸込
管７にそれぞれ連結されたビニールパイプ内のエアの正
圧を負圧にそれぞれ変換するベンチュリー１７および２
０と、該ベンチュリー１７からのエアの流通経路を遮断
し、エアを前記空環切り装置１へ逆流させるエア吹き返
しバルブ１９と、該エア吹き返しバルブ１９の開閉を司
るエア吹き返しソレノイド１８とから主として構成され
ている。The present invention will now be described in more detail with reference to the accompanying drawings. FIG. 1 is an explanatory view of an empty loop reverse stitching device of an overedge stitch sewing machine that is an embodiment of the present invention, and FIGS.
It is a partial detailed view of FIG. This device includes an empty ring cutting device 1 provided on an overedging sewing machine main body 24, a light receiver 3 as a part of a counter device for adjusting the length of the empty ring at the end of sewing, and above the light receiver 3. Placed, receiver 3
The light projector 11 emits light to the light receiver 3 to detect the presence or absence of the sewing material by changing the brightness of the light receiver 3, and guides the empty ring to the sewing position to stabilize it, and cooperates with a cloth feed dog (not shown) for sewing. A presser foot 6 for feeding the material, a front air nozzle 9 provided on the upper part of the presser foot 6 for determining a stitch length of an empty ring, and an empty ring cut into a predetermined length by the empty ring cutting device 1 are sucked. The air ring suction pipe 7 and the air ring suctioned by the air ring suction pipe 7
An idler ring presser cylinder 21 having an idler ring retainer piece 27 (see FIG. 3) to be fixed, and the idler ring suction pipe 7 is swung via the rod 30 and the rotary shaft 22 in response to a command of a sewing machine stop signal to move the needle. A first air-ring suction pipe drive air cylinder 23 that moves forward with respect to falling, and moves backward toward the worker side;
A second air ring suction pipe driving air cylinder 31 for setting an intermediate position between forward and backward movements of the air ring suction pipe 7, an air cylinder 23 for driving the first air ring suction pipe, and a second air ring suction pipe driving A connecting shaft 32 for connecting the air cylinder 31, and the connecting shaft 32
The position adjusting bolt 33 (see FIG. 4) for adjusting the advancing position or the retracting position of the empty ring suction pipe 7 provided on the sewing machine, the number of stitches to be sewn and the rotation of the sewing machine are determined. A constant speed counter device (not shown) for releasing the pressing of the ring pressing piece, and a venturi for converting the positive pressure of the air in the vinyl pipes connected to the empty ring cutting device 1 and the empty ring suction pipe 7 into negative pressure, respectively. 17 and 2
0, an air blowback valve 19 that shuts off the flow path of the air from the venturi 17 and causes the air to flow back to the empty ring cutting device 1, and an air blowback solenoid 18 that controls the opening and closing of the air blowback valve 19. Has been done.
【０００８】また、前記押え金６は、押え本体３６と、
その後端部に固定された空環押え３７および中央部に固
定された押え爪２８とからなり（図２参照）、該押え爪
２８には空環ガイド部２８ａおよび押え爪の溝２８ｂが
設けられている。４は針板、５はクロスプレート、１０
は空環吸込管７と空環押えシリンダ２１との連結部を構
成する空環押えシリンダ取付台、１２は前記押え金６を
押圧する押えヒンジ、１３は該押えヒンジを支持する押
え腕、１５は針棒、１４は縫い針２９を前記針棒１５に
固定する針止め、８は図示省略した下メスと協同して空
環２６および生地端を切断する上メス、１６は前記投光
器１１を固定する投光器取付台、２５はベンチュリー２
０およびエア吹き返しバルブ１９にそれぞれビニールパ
イプで連結された集塵箱である。The presser foot 6 includes a presser body 36,
It is composed of an empty ring presser 37 fixed to the rear end thereof and a presser pawl 28 fixed to the central portion (see FIG. 2). The presser pawl 28 is provided with an empty ring guide portion 28a and a groove 28b of the presser pawl. ing. 4 is a needle plate, 5 is a cross plate, 10
The reference numeral 12 designates an idler presser cylinder mounting base forming a connecting portion between the idler suction pipe 7 and the idler presser cylinder 21, 12 a presser hinge for pressing the presser foot 6, 13 a presser arm for supporting the presser hinge, 15 Is a needle bar, 14 is a needle stopper that fixes the sewing needle 29 to the needle bar 15, 8 is an upper knife that cuts the empty ring 26 and the material end in cooperation with a lower knife (not shown), and 16 is the light projector 11. Floodlight mount, 25 for Venturi 2
0 and the air blowback valve 19 are dust collection boxes connected by vinyl pipes.
【０００９】本装置は以上のような構成であり、図１１
のタイミングチャートを参照しながらその作用を説明す
る。まず、前順位の生地を縫い終わると受光器３が暗か
ら明となり、空環切り装置１が吸引作用を開始し、図示
省略した糸ゆるめ装置が地縫い縫製より空環２６をソフ
トチェーンにするための糸ゆるめ作用を開始する。する
と予め設定された縫い終わりの空環２６の長さを調整す
るためのカウンタＣの運針までミシンモータが回転し、
前記空環２６が一定の長さになるまで縫われる。空環２
６が一定長さまで縫われると、ミシンモータの回転は停
止し、空環切り装置１の吸引作用も停止する。次いで、
ミシンが停止した信号を受け、第１空環吸込管駆動用エ
アシリンダ２３のロッドが進出を始め（図４参照）、空
環吸込管７が回転軸２２を支点として揺動し、前記空環
吸込管７のノズル先端が針落ち近く（第１位置）に達し
（図６参照）、これと同時に空環吸込管７の吸引が開始
される。このとき、タイマーｇも作動を開始し、該タイ
マーｇで設定された所定の時間だけエア吹き返しソレノ
イド１８に通電され、チューブ内のエアはエア吹き返し
バルブ１９を介して空環切り装置１へ逆流し、空環２６
は空環吸込管７に吸引され易くなる。This device is constructed as described above, and is shown in FIG.
The operation will be described with reference to the timing chart of FIG. First, when the fabrics of the previous order are sewn, the light receiver 3 becomes dark and light, the empty loop cutting device 1 starts the suction action, and the thread loosening device (not shown) makes the hollow ring 26 a soft chain by the plain stitch sewing. To start the thread loosening action. Then, the sewing machine motor rotates up to the hand movement of the counter C for adjusting the length of the empty ring 26 at the end of sewing set in advance,
The empty ring 26 is sewn until it has a constant length. Sky ring 2
When 6 is sewn to a certain length, the rotation of the sewing machine motor is stopped and the suction action of the empty ring cutting device 1 is also stopped. Then
Upon receiving a signal that the sewing machine has stopped, the rod of the first air ring suction pipe driving air cylinder 23 starts to advance (see FIG. 4), and the air ring suction pipe 7 swings about the rotary shaft 22 as a fulcrum, The nozzle tip of the suction pipe 7 reaches near the needle drop (first position) (see FIG. 6), and at the same time, suction of the air ring suction pipe 7 is started. At this time, the timer g also starts to operate, the air blowback solenoid 18 is energized for a predetermined time set by the timer g, and the air in the tube flows back to the empty loop cutting device 1 via the air blowback valve 19. Sky ring 26
Is easily sucked into the air ring suction pipe 7.
【００１０】次いで予め設定されたタイマーｇの時間経
過後、エア吹き返しソレノイド１８はＯＦＦとなり、第
１空環吸込管駆動用エアシリンダー２３、第２空環吸込
管駆動用エアシリンダ３１は各々退入し、空環吸込管７
のノズル先端は揺動範囲の一番手前側（第３位置）まで
後退する（図６参照）。前記第１、第２空環吸込管駆動
用エアシリンダが退入を開始すると同時に空環押えシリ
ンダ２１、図示省略した押え揚げシリンダが作用を開始
し、空環押え片２７が下降し、空環２６を押圧、固定す
る（図３参照）。このとき、押え金６は上昇し、空環２
６は該押え金６に締結されている押え爪２８の空環ガイ
ド部２８ａの傾斜面を滑り、押え爪２８の裏面の溝２８
ｂに嵌入する。次に第２空環吸込管駆動用エアシリンダ
３１が進出し、空環吸い込み管７のノズル先端は上メス
８近傍（第２位置）に移動する（図５参照）。この時点
で、押え金６と針板上面４の間に次順位の縫製生地３５
を、その先端が上メス８のＡ部に届くまで挿入する。生
地が挿入されたことにより受光器３は明から暗となり、
糸ゆるめ続行中の糸ゆるめ装置はタイマーｄの時間経過
後、糸ゆるめ動作を解除し、通常の縫製状態となる。Then, after a preset timer g has elapsed, the air blowback solenoid 18 is turned off, and the first air ring suction pipe driving air cylinder 23 and the second air ring suction pipe driving air cylinder 31 are respectively withdrawn. And the empty ring suction pipe 7
The nozzle tip moves back to the foremost side (third position) in the swing range (see FIG. 6). At the same time when the air cylinders for driving the first and second pneumatic suction pipes start to retreat, the pneumatic pressing cylinder 21 and the lifting cylinder (not shown) start to operate, and the pneumatic pressing piece 27 descends to move the empty cylinder. 26 is pressed and fixed (see FIG. 3). At this time, the presser foot 6 rises and the empty ring 2
6 slides on the inclined surface of the hollow ring guide portion 28a of the presser pawl 28 fastened to the presser foot 6, and the groove 28 on the back surface of the presser pawl 28
Insert into b. Next, the air cylinder 31 for driving the second pneumatic suction pipe advances, and the tip of the nozzle of the pneumatic suction pipe 7 moves to the vicinity of the upper knife 8 (second position) (see FIG. 5). At this point, the sewing material 35 of the next rank is placed between the presser foot 6 and the needle plate upper surface 4.
Is inserted until the tip reaches the portion A of the upper knife 8. The light receiver 3 changes from light to dark due to the insertion of the cloth,
The thread loosening device, which is continuing the thread loosening, releases the thread loosening operation after the lapse of the timer d and enters the normal sewing state.
【００１１】次にミシン駆動用ペダルを踏むと、ミシン
は一定速で回転し、設定されているカウントＨのカウン
ト後、再び第２空環吸込管駆動用エアシリンダ３１が退
入し、図６に示すように空環吸込管７は第３位置に後退
し、縫い始めの生地端にある空環を縫目中に引張り込
む。次にカウントａが完了すると同時に空環押えシリン
ダ２１は上昇し、空環押え片は空環２６の押圧を解放す
る。このとき同時に、カウントｂのカウント終了後、前
エアノズル９がタイマーｅの時間だけ空環２６をメス装
置にエアで吹き付け、該空環２６を切断する。タイマー
ｅがアップした後、タイマーｆの時間だけベンチュリー
２０が作用し、空環吸込管７に吸引エアを送り、残され
た空環２６を吸い込み集塵箱２５へ移送して空環２６の
縫い込みが終了する。Next, when the sewing machine driving pedal is stepped on, the sewing machine rotates at a constant speed, and after the set count H is counted, the second air ring suction pipe driving air cylinder 31 retreats again, and FIG. As shown in FIG. 5, the empty ring suction pipe 7 is retracted to the third position, and the empty ring at the material end at the start of sewing is pulled into the stitch. Next, at the same time when the count a is completed, the empty ring pressing cylinder 21 moves up, and the empty ring pressing piece releases the pressing force of the empty ring 26. At this time, at the same time, after the count of the count b is completed, the front air nozzle 9 blows the empty ring 26 to the knife device with air for the time of the timer e, and disconnects the empty ring 26. After the timer e is up, the venturi 20 operates for the time of the timer f, sends suction air to the empty ring suction pipe 7, transfers the remaining empty ring 26 to the dust collecting box 25, and sew the empty ring 26. The inclusion is over.
【００１２】本実施例によれば、押え金６に固定された
押え爪２８の上面に空環ガイド部２８ａを、裏面に溝２
８ｂを設けたことにより、前記空環２６は空環ガイド部
２８ａの傾斜面を滑って押え金６（押え爪２８）の裏面
の溝２８ｂに嵌入し、ここでガイドされるので、該空環
２６が上ルーパ糸に引っ掛かることによる弊害、例えば
上ルーパ糸のテンションの緩みを防止することができる
ので、縫い始めから風合の良好なバックタック縫製を行
なうことができる。According to this embodiment, the presser pawl 28 fixed to the presser foot 6 has an empty ring guide portion 28a on the upper surface and the groove 2 on the back surface.
By providing 8b, the air ring 26 slides on the inclined surface of the air ring guide portion 28a and fits into the groove 28b on the back surface of the presser foot 6 (holding claw 28) and is guided here, so that the air ring is Since it is possible to prevent an adverse effect caused by the hooking of 26 on the upper looper thread, for example, loosening of the tension of the upper looper thread, it is possible to perform back tack sewing with a good texture from the beginning of sewing.
【００１３】また本実施例によれば、空環２６をシリン
ダ２１で押圧・固定した状態で空環吸込管７のノズル先
端部を第３位置に後退させ、該空環を押え爪２８の裏面
の溝２８ｂでサポートして縫目中に引張り込む構成とし
たことにより、前記空環２６の左右の揺れが防止でき、
空環２６が針２９に接触することによる弊害、例えば針
の破損を防止することができる。Further, according to the present embodiment, the nozzle tip portion of the empty ring suction pipe 7 is retracted to the third position while the empty ring 26 is pressed and fixed by the cylinder 21, and the empty ring is held on the back surface of the holding claw 28. Since it is supported by the groove 28b and pulled into the seam, it is possible to prevent the air ring 26 from swinging left and right,
It is possible to prevent a harmful effect caused by the contact of the empty ring 26 with the needle 29, for example, damage to the needle.
【００１４】[0014]
【発明の効果】本発明によれば、押え金に固定された押
え爪の上面に空環ガイド部を、裏面に空環用の溝を設け
たことにより、前記空環は押え金の裏面でガイドされる
ので、縫製生地のカールや空環の突出をなくすだけでな
く、空環と上ルーパ糸との接触による上ルーパ糸のテン
ションの緩みを防止して風合の良好な縁かがり縫いを行
なうことができる。According to the present invention, by providing the empty ring guide portion on the upper surface of the pressing claw fixed to the presser foot and the groove for the empty ring on the back surface, the empty ring is on the back surface of the presser foot. Since it is guided, not only curling of the sewing material and protrusion of the empty loop are eliminated, but also loosening of the tension of the upper looper thread due to contact between the empty loop and the upper looper thread is prevented, and overedging with a good texture is performed. Can be done.
【図１】本発明の一実施例を示す装置の斜視図。FIG. 1 is a perspective view of an apparatus showing an embodiment of the present invention.
【図２】空環の縫着中を示す部分拡大図および押え爪の
詳細図。FIG. 2 is a partially enlarged view showing the sewing of the empty ring and a detailed view of the presser pawl.
【図３】空環押えシリンダ取付台の断面図で、空環が空
環押え片で押圧されている状態を示す説明図。FIG. 3 is a cross-sectional view of the hollow presser cylinder mounting base, and an explanatory view showing a state in which the hollow ring is pressed by a hollow presser piece.
【図４】空環を吸引して空環吸込管が中間位置（第２位
置）へ戻ったときの状態を示す図。FIG. 4 is a view showing a state when the empty ring is sucked and the empty ring suction pipe returns to an intermediate position (second position).
【図５】生地が針板の爪先端にあるときの状態を示す説
明図。FIG. 5 is an explanatory view showing a state in which the cloth is on the tip of the nail of the needle plate.
【図６】空環を縫い目に引き込んだときの状態を示す説
明図。FIG. 6 is an explanatory view showing a state in which the empty ring is pulled into the seam.
【図７】、[FIG. 7]
【図８】、FIG. 8
【図９】、FIG. 9
【図１０】押え金および該押え金に固定される押え爪の
説明図。FIG. 10 is an explanatory view of a presser foot and a presser pawl fixed to the presser foot.
【図１１】タイミングチャートを示す図。FIG. 11 is a diagram showing a timing chart.
１…空環切り装置、３…受光器、４…針板、５…クロス
プレート、６…押え金、７…空環吸込管、８…上メス、
９…前エアノズル、１０…空環押えシリンダ取付台、１
１…投光器、１２…押えヒンジ、１３…押え腕、１４…
針止め、１５…針棒、１６…投光器取付台、１７…ベン
チュリー、１８…エア吹き返しソレノイド、１９…エア
吹き返しバルブ、２０…ベンチュリー、２１…空環押え
シリンダ、２２…回転軸、２３…第１空環吸込管駆動用
エアシリンダ、２４…ミシン本体、２５…集塵箱、２６
…空環、２６ａ…空環の軌跡、２７…空環押え片、２８
…押え爪、２８ａ…押え爪の空環ガイド部、２８ｂ…押
え爪の溝、２９…針、３０…ロッド、３１…第２空環吸
込管駆動用エアシリンダ、３２…連結軸。３３…位置調
節ボルト、３４…ロッド、３５…生地、３６…押え本
体、３７…空環押え。DESCRIPTION OF SYMBOLS 1 ... Air ring cutting device, 3 ... Light receiver, 4 ... Needle plate, 5 ... Cross plate, 6 ... Presser foot, 7 ... Air ring suction tube, 8 ... Upper knife,
9 ... Front air nozzle, 10 ... Air ring presser cylinder mounting base, 1
1 ... Projector, 12 ... Presser hinge, 13 ... Presser arm, 14 ...
Needle stopper, 15 ... Needle bar, 16 ... Emitter mount, 17 ... Venturi, 18 ... Air blowback solenoid, 19 ... Air blowback valve, 20 ... Venturi, 21 ... Pneumatic holding cylinder, 22 ... Rotating shaft, 23 ... First Air ring suction pipe driving air cylinder, 24 ... Sewing machine main body, 25 ... Dust collection box, 26
… Sky ring, 26a… Sky ring trajectory, 27… Sky ring holding piece, 28
... Presser claw, 28a ... Air ring guide portion of the presser claw, 28b ... Presser claw groove, 29 ... Needle, 30 ... Rod, 31 ... Second air ring suction pipe driving air cylinder, 32 ... Connection shaft. 33 ... Position adjusting bolt, 34 ... Rod, 35 ... Fabric, 36 ... Presser body, 37 ... Empty ring presser.
Claims (1)
込む縁かがり縫いミシンに設けられた空環切り装置と、
縫い終わりの空環長さを調整するカウンタ装置と、空環
を縫い位置へ導いて安定させるガイド部を有する押え金
と、該押え金の上部に設けられ、空環縫い込み長さを定
める前エアノズルと、前記空環切り装置で所定の長さに
切断された空環を吸引する空環吸込管と、該空環吸込管
に吸引された空環を押圧・固定する空環押え片を備えた
空環押えシリンダと、ミシン停止信号により、前記空環
吸込管を揺動させ、針落ちに対して前進または後退させ
る第１空環吸込管駆動用エアシリンダと、前記空環吸込
管の前進、後退位置の中間位置を設定する第２空環吸込
管駆動用エアシリンダと、該第１空環吸込管駆動用エア
シリンダと第２空環吸込管駆動用エアシリンダを連結す
る連結軸と、該連結軸に設けられ、前記空環吸込管の停
止位置を調節する位置調節ボルトと、縫製運針数とミシ
ンの回転を定め、空環縫い込み縫製終了後、前記空環押
え片の押圧を解除する一定速カウンタ装置と、前記空環
切り装置および空環吸込管にそれぞれ連結されたチュー
ブ内のエア圧力を正圧から負圧に変換する二つのベンチ
ュリー装置と、該ベンチュリー装置からのエアの流通経
路を遮断し、エアを前記空環切り装置へ逆流させるエア
吹き返しバルブと、該エア吹き返しバルブの開閉を司る
エア吹き返しソレノイドとを有する縁かがり縫いミシン
の空環返し縫い装置において、前記押え金が、押え本体
に固定された押え爪を有し、該押え爪の裏面に空環を縫
い位置で安定させる溝を設けるとともに、表面に空環を
前記裏面の溝に案内するガイド部を設けたことを特徴と
する縁かがり縫いミシンの空環返し縫い装置。1. An empty ring cutting device provided on an overlock stitch sewing machine, which sewes an empty ring to an appropriate position of a next-order fabric,
A counter device for adjusting the length of the empty ring at the end of sewing, a presser foot having a guide portion for guiding the empty ring to the sewing position and stabilizing it, and a presser foot provided on the presser foot before determining the sewing length of the empty ring. An air nozzle, an empty ring suction pipe for sucking the empty ring cut into a predetermined length by the empty ring cutting device, and an empty ring pressing piece for pressing and fixing the empty ring sucked by the empty ring suction pipe. Air cylinder pressing cylinder, a first air cylinder suction pipe driving air cylinder that swings the air cylinder suction pipe by a sewing machine stop signal, and moves the air cylinder suction pipe forward or backward with respect to the needle drop, and the advance of the air cylinder suction pipe. A second air ring suction pipe driving air cylinder for setting an intermediate position of the retracted position, and a connecting shaft for connecting the first air ring suction pipe driving air cylinder and the second air ring suction pipe driving air cylinder, It is provided on the connecting shaft and adjusts the stop position of the air ring suction pipe. The position adjustment bolt, the number of stitches to be sewn and the rotation of the sewing machine are determined, and the constant speed counter device for releasing the pressing of the empty ring pressing piece after the completion of the empty ring sewing sewing, the empty ring cutting device and the empty ring suction pipe are provided. Two venturi devices that convert the air pressure in each connected tube from a positive pressure to a negative pressure, and an air blowback valve that shuts off the flow path of the air from the venturi devices and causes the air to flow back to the air ring cutting device. And an air-blow back solenoid for controlling the opening and closing of the air-blow-back valve, in the empty-loop reverse stitching device of an overlock stitch sewing machine, wherein the presser foot has a presser pawl fixed to a presser body, and a back surface of the presser pawl is provided. A groove for stabilizing the empty ring at the sewing position and a guide portion for guiding the empty ring to the groove on the back surface are provided on the front surface of the overedged sewing machine. There devices.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30555592A JP3354186B2 (en) | 1992-11-16 | 1992-11-16 | Empty loop reverse stitching machine for overlock sewing machine |
| ITRM930757A IT1262438B (en) | 1992-11-16 | 1993-11-15 | REVERSE THREAD CHAIN STUFFING MACHINE FOR OVERLOCK SEWING MACHINE. |
| US08/336,244 US5513588A (en) | 1992-11-16 | 1994-11-07 | Overlock sewing machine and thread chain back-tacker therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30555592A JP3354186B2 (en) | 1992-11-16 | 1992-11-16 | Empty loop reverse stitching machine for overlock sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06154457A true JPH06154457A (en) | 1994-06-03 |
| JP3354186B2 JP3354186B2 (en) | 2002-12-09 |
Family
ID=17946568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30555592A Expired - Fee Related JP3354186B2 (en) | 1992-11-16 | 1992-11-16 | Empty loop reverse stitching machine for overlock sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3354186B2 (en) |
| IT (1) | IT1262438B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100393929C (en) * | 2001-11-08 | 2008-06-11 | 大和缝纫机制造株式会社 | Idle loop sewing method and unit |
| CN115074923A (en) * | 2021-03-16 | 2022-09-20 | 杰克科技股份有限公司 | Sewing machine |
-
1992
- 1992-11-16 JP JP30555592A patent/JP3354186B2/en not_active Expired - Fee Related
-
1993
- 1993-11-15 IT ITRM930757A patent/IT1262438B/en active IP Right Grant
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100393929C (en) * | 2001-11-08 | 2008-06-11 | 大和缝纫机制造株式会社 | Idle loop sewing method and unit |
| CN115074923A (en) * | 2021-03-16 | 2022-09-20 | 杰克科技股份有限公司 | Sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1262438B (en) | 1996-06-19 |
| JP3354186B2 (en) | 2002-12-09 |
| ITRM930757A0 (en) | 1993-11-15 |
| ITRM930757A1 (en) | 1995-05-15 |
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