JPS6048784A - Needle yarn breakage detector of sewing machine - Google Patents
Needle yarn breakage detector of sewing machineInfo
- Publication number
- JPS6048784A JPS6048784A JP15753283A JP15753283A JPS6048784A JP S6048784 A JPS6048784 A JP S6048784A JP 15753283 A JP15753283 A JP 15753283A JP 15753283 A JP15753283 A JP 15753283A JP S6048784 A JPS6048784 A JP S6048784A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- needle
- sewing machine
- detection
- take
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
技術分野
この発明は、針の上下動に伴って形成さ４する１糸の糸
輪を捕捉づるための糸輪捕捉器と、１糸の供給源から前
記針に至る針糸経路上におりるミシンのフレームに上下
動可能に配置され、１１０記１．１の上下動とタイミン
グを合わけて劉糸取り上げ作用をなす天秤とを備えたミ
シンに係り、特に、前記針糸経路上に配置された１１糸
切れ検出％ ｉ＋ｆｉに関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a thread loop catcher for catching a thread loop of one thread formed as a needle moves up and down, and a thread loop catcher for catching a thread loop of one thread formed as the needle moves up and down, and a thread loop catcher for catching a thread loop of one thread that is formed as the needle moves up and down; It pertains to a sewing machine equipped with a thread take-up mechanism, which is disposed on the frame of the sewing machine on the needle thread path so as to be movable up and down, and which takes up the thread at the same timing as the up and down movement of Section 110, 1.1. This relates to 11 thread breakage detection % i+fi placed on the needle thread path.
従来技術
従来、この種の針糸切れ検出装置としては、例えば、天
秤と針との間の組糸経路中において組糸に接触する方向
へ移動付勢された感知レバーを設（：Ｉ、天秤の糸取り
上げ作用により組糸が緊張した時に、その針糸との係合
に基づき、前記感知レバーがその感知レバーに対づ−る
付勢力に抗して移動されることにより糸検出信号が発生
されるようにしたものがある。Conventionally, this type of needle thread breakage detection device has, for example, provided a sensing lever that is biased to move in the direction of contacting the braided thread in the thread thread path between the thread take-up thread take-up and the needle (:I, When the braided thread becomes tense due to the thread take-up action of the needle thread, the sensing lever is moved against the biasing force against the sensing lever based on the engagement with the needle thread, thereby generating a thread detection signal. There is something that has been made to be done.
ところが、この従来装置においては、天秤による糸取上
げ時、つまり糸締まり時に組糸には糸取上げによる張力
に加えて感知レバーどの接触による張ツノがさらに伺与
されるので、針糸張力が所定値から変動し、その張力変
動に起因して、加工布中におりる組糸ど下糸との結節点
が上方に移動して縫ｌ」が乱れ、縫製品の商品価値が低
下づ−るＪ３それがある。又、この糸切れ検出装置にＪ
３いて【よ前述したように過大な張力が（＝Ｊ与される
ので、縫製終了時におりる糸切断接、針の目孔がら垂下
される糸残り吊が少なくなり、次回の縫製開始直後に目
飛びが生じるＪ５それがある。However, in this conventional device, when the thread take-up is taken up by the thread take-up, that is, when the thread is tightened, in addition to the tension caused by the thread take-up, the braided thread is subjected to a tension horn caused by the contact of the sensing lever, so that the needle thread tension does not reach the predetermined value. Due to the tension fluctuation, the knotting point of the braided yarn and the bobbin thread in the work cloth moves upwards, disrupting the stitching and reducing the commercial value of the sewn product.J3 There is that. Also, this thread breakage detection device has J
3. As mentioned above, excessive tension (=J) is applied, so the thread breakage that occurs at the end of sewing and the remaining thread that hangs down through the eye of the needle are reduced. There is a J5 that causes skipped stitches.
つまり、縫製終了後にＪ３りる針糸切断は釧及び天秤が
上昇移動した位置で行４つれ、この位置では天秤及び感
知レバーによって組糸に大きな張力が付与されて、組糸
が伸長される。このため、この状態で組糸切断が行なわ
れると、その１１糸は縮む。That is, after sewing is completed, the needle thread is cut in J3 at the position where the hook and thread take-up have moved upward, and at this position, a large tension is applied to the braided thread by the thread take-up and the sensing lever, and the thread is stretched. Therefore, when the braided threads are cut in this state, the 11 threads will shrink.
これにより、針に通された部分の糸が糸供給側に復帰し
て糸残り量が少なくなる。そして、この傾向は当然のこ
とながら合成繊維等の伸縮性の大きい糸において顕著で
ある。As a result, the thread threaded through the needle returns to the thread supply side, reducing the amount of remaining thread. Naturally, this tendency is remarkable in highly elastic yarns such as synthetic fibers.
目的
この発明は上記の問題点を解消り−るためになされたも
のであってその目的は、組糸切れを簡単且つ確実に検知
し得るばかりでなく、組糸の張〕ｊ変動が生じるｄ３％
れ及び＄１糸切断後にお（）る１１糸残り母に対する悪
影響を未然に防ぐことができる新規なミシンの銅糸切れ
検出装置を提供づることにある。Purpose This invention has been made to solve the above-mentioned problems, and its purpose is to not only easily and reliably detect braiding yarn breakage, but also to detect braiding thread tension d3 where fluctuations occur. %
It is an object of the present invention to provide a novel copper thread breakage detection device for a sewing machine that can prevent an adverse effect on the thread remaining after the $1 thread is cut.
発明の禍成
上記の目的を達成するためにこの発明においては、天秤
が下降された時のみその下降に伴って移動される組糸と
接触し得る位置においてフレームに糸感知部材を往復動
可能に支承し、且つその糸感知部材を常には前記組糸に
向かう方向にイ」勢し、前記天秤が下降された時、糸輪
捕捉器によって引張られる針糸の張ノ〕に基づき前記ｆ
す勢作用に抗して糸感知部材を移動させ、前記糸感知部
材が移動される度に検出信号を発生する検出手段を設（
）、その検出手段から検出信号が周期的に発生ずるか否
かに基づき剣糸切れの発生の有無を判別するための判別
手段を設ＬＪでいる。SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, in this invention, a thread sensing member is reciprocated on the frame at a position where it can come into contact with the braided threads that are moved as the thread is lowered only when the thread take-up is lowered. and always pushes its thread sensing member in the direction toward the braided yarn, and when the thread take-up lever is lowered, the tension of the needle thread pulled by the thread loop catcher is determined based on the tension of the needle thread pulled by the thread loop catcher.
Detection means is provided for moving the thread sensing member against the force of force and generating a detection signal each time the thread sensing member is moved.
), a determining means is provided in LJ for determining whether or not a sword thread breakage occurs based on whether a detection signal is periodically generated from the detecting means.
実施例
以下、この発明を具体化した一実施例を第１図〜第６図
に従って説明づる。第１図に示Ｊようにミシンのフレー
ム１のアーム部２には１１棒４が上下動可能に支承され
、その下端部には剣３及び糸案内５が装着されＣいる。EXAMPLE An example embodying the present invention will be described below with reference to FIGS. 1 to 6. As shown in FIG. 1, an arm 2 of a frame 1 of the sewing machine supports an 11 rod 4 so as to be movable up and down, and a sword 3 and a thread guide 5 are attached to the lower end of the rod 4.
前記フレーム１のベッド部Ｇ内には前記！１３の上下動
に伴って形成される１１糸Ｔの糸輪を捕捉するための糸
輪捕捉器７が一軸線のまわりで回転可能に支持されてい
る。前記アーム部２の前面には針糸供給源（図示しない
）から釦３に供給される組糸Ｔの経路上に位置する周知
の糸調子器８が取イ」りられるとともに、複数の糸案内
イ４−９が取付（）られている。さらに、前記アーム部
２内には周知の天秤機構により作動される天秤１０が設
りられていて、その先端がアーム部２前面に突出するよ
うになっている。そして、前記１１糸供給源から供給さ
れる組糸Ｔは、各糸案内体９．糸調子器８．天秤１０．
糸案内５を介して釦３に供給され、その釦３と糸輪捕捉
器７との協動により、加工作に対して縫目が形成される
ようになっている。Inside the bed portion G of the frame 1 is the above! A thread ring catcher 7 for catching a thread ring of 11 threads T formed as the threads 13 move up and down is rotatably supported around one axis. A well-known thread tension device 8 located on the path of the braided thread T supplied from a needle thread supply source (not shown) to the button 3 is disposed on the front surface of the arm portion 2, as well as a plurality of thread guides. A4-9 is installed (). Furthermore, a balance 10 operated by a well-known balance mechanism is provided in the arm 2, and its tip protrudes to the front surface of the arm 2. The braided yarn T supplied from the 11 yarn supply sources is then supplied to each yarn guide body 9. Thread tension device8. Balance 10.
The thread is supplied to the button 3 via the thread guide 5, and by the cooperation of the button 3 and the thread loop catcher 7, a stitch is formed for the workpiece.
次に釘糸切れ検出装置の、１ｙ４成について説明覆る。Next, we will explain the 1y4 configuration of the nail thread breakage detection device.
第１図〜第４図に示すように、アーム部２の前面はぼ中
火には左右に所定の間隔をｄ３いて３個の支持片１１ａ
〜１１ｃがねじ１２により取付（プられ、各支持片１１
８〜１１Ｇにはピアノ線にて（Ｊは１字状に折曲形成さ
れた光感′）Ｊ１部材１３かその軸部１５にて回動可能
に挿通支持されている。そして、この糸感知部材１３の
糸感知部１４は最左側に位置する支梢片１１ａと天秤１
０との間に配置され、第３図に示ず上方位置と第４図に
承り下方位置との間で往復回動じ得るようになっている
。右方の一対の支持片１１１）、１１Ｃの間にｄ３いて
前記糸感知部材１３の軸部１５にはブロック状の支持体
１６が挿１■支持され、その支持体１６には金属板にて
折曲形成された検出部材１７が外面されている。そして
、この検出部材１７は取付（ブねじ１８によって前記支
持体１６に固着されている。又、前記検出部４Ａ１７及
び支持体１６に螺入されたねじ１９の先端が前記糸感知
部材１３の軸部１５に係合され、その係合に塁づき糸感
知部材１３．支持体１６及び検出部材１７が一体的に回
動し１ｑるようになっている。前記一対の支持片１１ｂ
、１１Ｃどアーム部２前而との間においてアーム部２に
は正面はぼＴ字状をなず板ばね２０が前記ねじ１２によ
り共線めされ、その板ばね２０の先端部が前記検出部材
１７の下端部内面に係合されていて、その板ばね２０に
より検出部材１７．支持体１６及び糸感知部材１３が第
２図の１６計方向へ回動（＝Ｉ勢されている。前記検出
部材１７の上端には検出片２１が突出形成され、その検
出片２１に隣接して前記アーム部２前面にはブラケット
２２がねじ２２ａにより取（＝Ｊ（ノられている。この
ブラグッ１へ２２にはスリブ１〜２４を漏えたフｉ ｌ
−インタラプタ２３が取（’Ｊ（すられ、スリット２／
４の両側に位置するようにフＡトインタラブタ２３内に
は発光素子及び受光素子（図示しない）が内蔵されてい
る。そして、第１図に実線Ｃ示り゛ように糸輪捕捉器７
による針糸捕捉前にＪ５いて天秤１ｏがその上下動範囲
の上死点近傍まで上昇されるとともに、ａｔ ３がその
上下動範囲の上死点近傍に位置する状態においては、第
１図及び第３図に示Ｊように、銅糸Ｔが前記糸感知部オ
Δ１３の糸感知部１７′Ｉから離間しているため、板ば
ね２０のばねツノに塁づ８、その糸感知部材１３ととも
に検出片２１が第３図に示す位置に配置され、その検出
片３１が７４１〜インタラプタ２３のスリット２４内に
進入して投受光素子間の光路が遮られる。この状態にＪ
５いては前記ノーＡ１−インタラプタ２３がら検出信号
Ｔｌ−ｌ５ ｈ＜発生しないようになっている。As shown in FIGS. 1 to 4, the front surface of the arm portion 2 has three supporting pieces 11a spaced apart from each other by a predetermined distance d3 on the left and right sides.
~11c is attached (pulled) with screws 12, and each support piece 11
8 to 11G are rotatably inserted and supported by the J1 member 13 or its shaft portion 15 using piano wires (J is a light sensor formed by bending into a single character shape). The thread sensing portion 14 of this thread sensing member 13 is connected to the leftmost supporting piece 11a and the thread take-up lever 1.
0, and can reciprocate between an upper position (not shown in FIG. 3) and a lower position (shown in FIG. 4). A block-shaped support 16 is inserted and supported on the shaft 15 of the thread sensing member 13 between the right pair of support pieces 111) and 11C, and a metal plate is attached to the support 16. The bent detection member 17 has an outer surface. This detection member 17 is fixed to the support body 16 by a mounting screw 18. Also, the tip of the screw 19 screwed into the detection portion 4A17 and the support body 16 is connected to the shaft of the thread sensing member 13. 15, and due to the engagement, the thread sensing member 13, the support body 16, and the detection member 17 rotate integrally by 1q.The pair of support pieces 11b
, 11C and the front of the arm part 2, the arm part 2 has a T-shaped plate spring 20 on the front side and is collinear with the screw 12, and the tip of the plate spring 20 is connected to the detection member. The detection member 17.17 is engaged with the inner surface of the lower end of the detection member 17. The support body 16 and the yarn sensing member 13 are rotated in the direction of 16 in FIG. A bracket 22 is attached to the front surface of the arm portion 2 with a screw 22a (=J).
- Interrupter 23 takes ('J (Surare, slit 2/
A light-emitting element and a light-receiving element (not shown) are built into the photointerrupter 23 so as to be located on both sides of the frame. Then, as shown by the solid line C in FIG.
Before the needle thread is captured by As shown in FIG. 3, since the copper thread T is separated from the thread sensing part 17'I of the thread sensing part O Δ13, the copper thread T is mounted on the spring horn of the leaf spring 20 and is detected together with the thread sensing member 13. The piece 21 is placed at the position shown in FIG. 3, and the detection piece 31 enters into the slit 24 of the interrupter 23 to block the optical path between the light emitting and receiving elements. In this state
5, the above-mentioned NO A1-interrupter 23 is arranged so that the detection signal Tl-l5h is not generated.
又、第１図に鎖線で示すように、糸輪捕捉器７による側
糸捕捉後において天秤１０がその上下動範囲の下死点近
傍まで不時されるとともに、金１３がその上下動範囲の
上死点近傍まで上昇され、前記糸輪捕捉器７の回転に伴
って１１糸Ｔが引張られてその４糸Ｔに張力がイ」与さ
れたどきには、その４糸１”と糸感知部１４との係合に
基づき糸感知部材１３とともに検出部材１７が第３図に
示ず位置から反時ａ１方向へ回動され、第４図に示すよ
うに、検出片２１がフｉ１−インタラプタ２３のスリブ
１〜２４から前方へＩＢ２出する。このため、前記フＡ
１〜インタラプタ２３の投受光素子間の光路が閉じられ
て、前記検出信号Ｔ Ｉ−Ｉ Ｓが発生り°る。従って
、ミシンのｉ製運転に伴い１１糸Ｔが糸輪捕捉器７によ
り引張られる度に糸感知部（′／１１３が第３図に示づ
位置と第４図に示す位置との間で往復回動され、）第１
〜インタラプタ２３からは第６図に示づ゛ようにミシン
主軸（図示しない）の回転速度に調時して検出部＠１−
Ｈ８が発生する。Further, as shown by the chain line in FIG. 1, after the side yarn is caught by the thread ring catcher 7, the thread take-up lever 10 is moved to near the bottom dead center of its vertical movement range, and the metal 13 is moved to the vicinity of the bottom dead center of its vertical movement range. When the thread is raised to near the top dead center and the 11th thread T is pulled as the thread ring catcher 7 rotates, and tension is applied to the 4 threads T, the 4th thread 1" and the thread sensor Based on the engagement with the section 14, the detection member 17 together with the yarn sensing member 13 is rotated counterclockwise in the a1 direction from a position not shown in FIG. 3, and as shown in FIG. IB2 is brought forward from the sleeves 1 to 24 of No. 23. For this reason, the above-mentioned flap A
The optical path between the light emitting and receiving elements of the interrupter 1 to the interrupter 23 is closed, and the detection signal TIS is generated. Therefore, each time the 11th thread T is pulled by the thread wheel catcher 7 while the sewing machine is in operation, the thread sensor ('/113) moves back and forth between the position shown in FIG. 3 and the position shown in FIG. rotated) first
~The interrupter 23 outputs a detection unit @1- in synchronization with the rotational speed of the sewing machine main shaft (not shown) as shown in FIG.
H8 occurs.
そして、第５図に示すように、この検出信号ＴトＩＳは
判別手段を構成するＪＫフリップフロップ２５のに端子
に入力されるとともに、インバータ２６を介してＪ端子
に入力されるようになっている。As shown in FIG. 5, this detection signal T and IS is input to the terminal of the JK flip-flop 25 constituting the determining means, and is also input to the J terminal via the inverter 26. There is.
一方、ミシンの縫製運転時には、ミシン主軸が一回転す
る度に、前記検出信号］゛トＩＳに同期して公知のタイ
ミング信号発生手段からタイミング化ＱＳＹＣが発生さ
れ、そのタイング侶号ＳＹＣが前記ＪＫフリップフロッ
プ２５のＧＫ端子に入力されるようになっている。又、
このＪＫフリップフロップ２５のＣＬＲ端子には、ミシ
ンのフレーム１の外面等に設けられたクリアボタン（図
示しない）の抑圧操作時に発生づるクリア信Ｍ ＣＬ
Ｒが入力される。そして、このクリア信Ｓ ＣＬ Ｒが
入力されたとき、前記Ｊ Ｋフリツプフ（］ツブ２５の
Ｑ端子から出力される判別信号が第６図に示Ｊようにプ
ラス電位からＯ電位に立ち下がり、その状態に保持され
る。On the other hand, during sewing operation of the sewing machine, every time the main shaft of the sewing machine rotates once, a timing signal QSYC is generated from a known timing signal generating means in synchronization with the detection signal IS. The signal is input to the GK terminal of the flip-flop 25. or,
The CLR terminal of this JK flip-flop 25 receives a clear signal M CL which is generated when a clear button (not shown) provided on the outer surface of the frame 1 of the sewing machine is pressed.
R is input. When this clear signal SCLR is input, the discrimination signal output from the Q terminal of the JK flippuff (] knob 25 falls from the positive potential to the O potential as shown in FIG. held in state.
次に、上記のように構成されたミシンの作用を説明する
。さて、第１図は糸供給源からの監（糸Ｔが糸案内体９
．糸調子器８及び天秤１０等を介し−ｃ ｉｔ ３にＩ
ｔ通された状態でミシンが運転され、前記天秤１０がそ
の上下動範囲の上死点近傍まで上５−されるとどもに、
多１３がその上下動範囲の上死点近傍に位置する状態を
示づものである。この状態にＪ３いては、第１図及び第
３図に示づように、１１糸Ｔが糸感知部材１３の糸感知
部１４から離間しているため、板ぽね２ｏのばね力に基
づき前記糸感知Ｂｔｌ材１３の糸感知部１４が上方位置
に配置されるとともに、検出部材１７の検出片２１が７
ｉ１−インクラブタ２３のスリブｔ・２ ／４内に配置
される。従って、そのフォトインタラプタ２３がら【は
第６図に承り検出信号Ｔ ＨＳは発生しない。−力、縫
製１７ｉｌ々ｉ’ｆ ｉ１５’ ｉこは予めクリアボタ
ンが押ＤＩされているため、ＪＫフリップフロップ２５
のＣＬＲ端子にはクリア信号ＣＬＲが入力され、Ｑ端子
が出力される判別信号（よ０電位に保持されている。Next, the operation of the sewing machine configured as described above will be explained. Now, Figure 1 shows the supervision from the yarn supply source (the yarn T is
．． I to c it 3 via thread tension device 8 and thread take-up 10 etc.
When the sewing machine is operated with the thread threaded and the thread take-up 10 is raised to near the top dead center of its vertical movement range,
This shows a state in which the shaft 13 is located near the top dead center of its vertical movement range. In this state J3, as shown in FIGS. 1 and 3, since the 11th thread T is separated from the thread sensing part 14 of the thread sensing member 13, the The thread sensing part 14 of the thread sensing Btl material 13 is arranged at the upper position, and the detection piece 21 of the detection member 17 is
The i1-include is disposed within the slit t·2/4 of the ink collector 23. Therefore, the photointerrupter 23 does not generate the detection signal THS as shown in FIG. - Since the clear button has been pressed in advance, the JK flip-flop 25
A clear signal CLR is input to the CLR terminal of , and a discrimination signal (held at 0 potential) is output from the Q terminal.
引き杭さ、ミシン主軸の回転に伴い前記天秤１０が１１
３の１下動とタイミングを合わせて上下動されるととも
に糸輪捕捉器７が回転され、天秤１０が第１図に鎖線で
示ず下死点近傍まで下降されたとき、糸輪捕＆’器７に
よって層系−「が引張られると、第１図に鎖線で示すと
ともに、第４図に示すようにその１；１糸Ｔとの係合に
基づぎ、板ばね２０の（まね力に抗して糸感知部材１３
の糸（へ油部１１１が第４図に示づ一下方位置に配置さ
れる。又、ぞの下方配置に伴い検出部ｖＪ１７の検出）
’＋−２１はフォトインタラプタ２３のスリブ１へ２４
から前方へ１］ｔ２出づ−る。With the rotation of the main shaft of the sewing machine, the thread take-up 10 becomes 11.
The thread ring catcher 7 is moved up and down in synchronization with the downward movement of 3-1, and the thread ring catcher 7 is rotated. When the layer system "-" is pulled by the device 7, the (copying force) of the leaf spring 20 is increased based on the engagement with the thread T, as shown by the chain line in FIG. 1 and as shown in FIG. The yarn sensing member 13
(The oil part 111 is placed at the lower position as shown in FIG. 4. Also, due to the lower position, the detection part vJ17 detects)
'+-21 is 24 to the sleeve 1 of the photo interrupter 23
From forward 1] t2 comes out.
従って、そのフＡ（〜インタラプタ２３がらは検出信号
Ｔ ＨＳが発生する。Therefore, the detection signal THS is generated from the interrupter 23.
このように、針糸切れが発生していない１富な状態でミ
シンが運転されると、天秤１０が下降された時、糸輪捕
捉器７によっで引張られる層系Ｔとの係合に基づき、糸
感知部１４が第４図に示−４下方位置まで周期的に回ｒ
Ｂｒされる。それににす、ミシン主軸の回転に伴って周
期的に発生ずるタイミング信号ＳＹＣと同期して前記フ
ォ１へインタラプタ２３から検出信号ＴＨ８が周期的に
発生す−る。In this way, when the sewing machine is operated in a state where the needle thread is not broken and the needle thread is not broken, when the thread take-up lever 10 is lowered, the engagement with the layer system T pulled by the thread loop catcher 7 is caused. Based on this, the yarn sensing section 14 is periodically rotated to the lower position shown in FIG.
Br will be given. In addition, a detection signal TH8 is periodically generated from the interrupter 23 to the foregoing FO1 in synchronization with a timing signal SYC that is periodically generated as the main shaft of the sewing machine rotates.
一方、ミシンの運転中に副系切れが生じた場合には、天
秤１０の下降時において糸感知部材１３の糸感知部１４
に対し下方位置側への回動力が１１与されないため、板
ばね２０のはねツノに基づき、糸感知部（第１３の糸感
知部１４が第３図に示す上方位置に配置保持されるとと
もに、検出部４Ａ１７の検出片２１がノーＡ１−インタ
ラプタ２３のスリブ１へ２４内に進入づる。従って、前
記〕Ａトインタラブタ２３からの検出信号ＴＨ３がＪＫ
フリップ７０ツブ２５に入力されなくなる。このとき、
人力されるはずの検出信号Ｔ Ｉ−Ｉ Ｓは第６図に破
線で示されて（１３す、この検出信号ＴＨ３に相応Ｊべ
きタイミング信号ＳＹＣの立ら下がりと同時にＪＫフリ
ップノロツブ２５のＱ端子からの判別信号がＯ電位から
プラス電位に立上がり、その立上がりに基づきミシンの
フレーム１に設（Ｊられたブザー（図示しない）が作動
されたり、ミシンの縫製運転が停止されたりする。従っ
て、作業者は１１糸Ｔが糸切れ等により弛緩した状態を
迅速、確天に知ることができる。On the other hand, if a subsystem breakage occurs during operation of the sewing machine, the thread sensing portion 14 of the thread sensing member 13 is
Since no rotational force 11 is applied to the lower position side, the thread sensing section (thirteenth thread sensing section 14) is placed and held at the upper position shown in FIG. , the detection piece 21 of the detection section 4A17 enters into the sleeve 1 of the NO A1-interrupter 23. Therefore, the detection signal TH3 from the A-to-interrupter 23 is JK.
It is no longer input to the flip 70 knob 25. At this time,
The detection signal T I-I S, which should be manually input, is shown by a broken line in FIG. The discrimination signal from the terminal rises from the O potential to the positive potential, and based on the rise, a buzzer (not shown) installed in the frame 1 of the sewing machine is activated or the sewing operation of the sewing machine is stopped. The operator can quickly and accurately know if the thread 11 is loosened due to thread breakage or the like.
又、この実施例においては、天秤１０が下降されたとき
のみその下降に伴って移動される副系丁に糸感知部材１
３が接触りるようになってｄ５す、その天秤１０の下ｎ
ＩＩ、ｋに糸輪捕捉器７にＪ、って引張られる銅糸下
の張ハに基づき前記糸感知部４，４１３が回動されるよ
うになっているため、天秤１０の上が、７なわち糸取上
げ作用にＪ、って１１糸丁に糸締め作用がイリ与される
とさ、張力は変動Ｕずに常に一定に保たれ、加■イ１１
中にＪｊｌノる層系Ｔと下糸との結ｆｌｉ）点の位置を
常に一定に保つことがでさ、縫目の乱れがない美麗な縫
製品を作ることができる。Further, in this embodiment, only when the thread take-up lever 10 is lowered, the thread sensing member 1 is attached to the sub-system that is moved along with the lowering of the thread take-up lever 10.
3 comes into contact and d5, the lower n of the balance 10
Since the thread sensing section 4, 413 is rotated based on the tension under the copper thread which is pulled by the thread ring catcher 7 at II and k, the upper part of the thread take-up lever 10 is In other words, when the thread tightening action is applied to the thread pick-up action J, and the thread tightening action is applied to the 11th thread, the tension is always kept constant without fluctuation, and the
By keeping the position of the tying point between the inner layer T and the bobbin thread constant, it is possible to create beautiful sewn products with no irregular seams.
さらに、以上のように大秤十冒簡には糸感知部４第１３
が１１１糸Ｔに接触しないため、Ｉ製ザイクルの終了時
に３３いて前記天秤１０が土デ？した位１６で行われる
ｆ１糸丁の切断の後に、前記１１糸“「の釧３の目礼か
らの糸残り吊を常に一定にかつ充分な長さに保つことが
でき、次回の縫製１７ｉ１始時において目飛びの発生を
確実に防止りることがでさる。Furthermore, as mentioned above, the 13th thread sensing part 4 is
does not touch the 111 thread T, so at the end of the cycle made by I, the thread take-up 10 is at 33. After cutting the f1 thread in step 16, the thread remaining from the thread 11 "" can be kept constant and at a sufficient length, so that the thread remaining at the beginning of the next sewing step 17i1 can be kept constant and at a sufficient length. In some cases, it is possible to reliably prevent the occurrence of skipped stitches.
なお、この考案は前記実施１シリに限定されるものでは
なく、例えば糸感知部オΔをフレームに対して上下動可
能に支承し、副系に向かう方向に（＝Ｉ勢ずることも可
（ｉピてｄうる。Note that this invention is not limited to the above-mentioned first embodiment; for example, it is also possible to support the thread sensing part O Δ so that it can move up and down with respect to the frame, and to move it in the direction toward the subsystem (=I). I can't get enough of it.
効果
以上詳述したＪ、うにこの発明は、天秤が下降された時
のみその下降に伴って移動される針糸と接触し１↓する
位１６にＪ３いてフレームに糸感知部拐を往復動可能に
支承し、且つその糸感知部材を常には前記１１糸に向か
う方向に付勢し、前記天秤が下Ｉｉ４された時、糸輪捕
捉器によって引張られる針糸の張力に基づき前記ｆ］勢
作用に抗して糸感知部材を移動させ、前記糸感知部材が
移動される度に検出信号を発生ずる検出手段を設け、そ
の検出手段から検出信号が周Ｗ」的に発生ずるか否かに
基づき１１糸切れの発生の有無を判別Ｊるための判別手
段を設（）たことにより、２１糸の糸切れを確実に検出
でさるばかりで４ｃり、ミシンの縫製運転中におＣノる
月光の張力を１＋ｉ”に一定に保つことができ、しかも
、ｔ／１製終了１１４にお（プる光切断１１・Ｙに、多
１糸残りｍを確保して次回の縫製開始時にＪ＞ ｉＪる
目飛びの発生を未然に防止づることかできるという優れ
た効果を秦する。Effects This invention has been described in detail above, and only when the thread take-up is lowered, it is possible to reciprocate the thread sensing part on the frame by contacting the needle thread that is moved as the thread is lowered. and always biases the thread sensing member in the direction toward the thread 11, and when the thread take-up is lowered Ii4, the f] biasing action is performed based on the tension of the needle thread pulled by the thread ring catcher. A detecting means is provided for moving a thread sensing member against the movement of the thread and generating a detection signal each time the thread sensing member is moved, and based on whether or not the detection signal is generated circumferentially from the detecting means. By installing a discriminating means to determine whether thread breakage occurs or not, it is possible to reliably detect the thread breakage of thread 21, and it will take 40 minutes to detect thread breakage. It is possible to keep the tension constant at 1+i'', and in addition, at the end of t/1 sewing 114 (pull light cutting 11・Y), a large number of threads (m) can be secured to ensure that when the next sewing starts, J > iJ It has an excellent effect of preventing the occurrence of skipped stitches.
第１図はこの発明を具体化したミシンの一部を破断じて
示す正面図、第２図は第′１図にＪ−夕ける■−■線断
面図、第３図（Ｊ天秤上ｙ１時におｔｊる１１糸切れ検
出装置の状態を示１側面図、第４図は天（１′下降１１
冒こＪ月プる針糸切れ検出装置の状態を示Ｊ側面図、第
５図は検出信号を判別りる回路図、第６図はタイミング
チャートである。
フレーム１、釦３、糸輪捕捉器７、天秤１０、糸感知部
４Ａ１３、検出手段としての］Ａトインクラブタ２３、
判別手段としてのＪ Ｋフリツプノ「１ツブ２５、針糸
Ｔ、検出信号−ｒ’ ｌ−Ｉ Ｓ 。
特 Ｗ（出 願 人 ブラザー工業株式会社代 理 人
弁理士 ｊ以ＩＩ 傅宜
第２図
第４図Fig. 1 is a partially cutaway front view of a sewing machine embodying the present invention, Fig. 2 is a sectional view taken along the line ■-■ at Fig. Figure 1 shows the condition of the thread breakage detection device.
A side view showing the state of the needle thread breakage detection device, FIG. 5 is a circuit diagram for determining the detection signal, and FIG. 6 is a timing chart. Frame 1, button 3, thread loop catcher 7, thread take-up 10, thread sensing section 4A13,] A tow-in-clutter 23 as a detection means,
JK Flipuno's ``1 knob 25, needle thread T, detection signal -r'l-IS'' as a means of discrimination. Figure 4
Claims (1)
の糸輪を捕捉Ｊるための糸輪捕捉器（７）と、 針糸（Ｔ ）の供給源から前記針（３）に至る１糸経路
」ニにＪ５４ノるミシンのフレーム（１）に上下動可能
に配置され前記針（３）の上下動とタイミングを合わ「
て側糸取上げ作用をなす天秤（１０）とを備えたミシン
にＪ３いて、 前記天秤（１０）が下降されＩこ時のみその下降に伴っ
て移動される１糸（Ｔ）と接触し得る位置において前記
フレーム（１）に対し往復動可能に支承され、且つ常に
は前記剣先（Ｔ）に向かう方向に付勢された糸感知部材
（１３）と、その糸感知部材（１３）は前記天秤（１０
）が下降された時、前記糸輪捕捉器く７）によって引張
られる針糸（Ｔ）の張力に基づき前記付勢作用に抗して
移動されることと、 前記糸感知部材（１３）が移動される度に検出信号（Ｔ
Ｈ８）を発生′する検出手段（２３）と、その検出手段
（２３）からの検出信号（Ｔ Ｉ−Ｉ Ｓ ）が周期的
に発生するか否かに塁づさ釧糸切れの発生の有無を判別
するｌこめの判別手段く２５）とを設けたことを特徴と
する釧糸切れ検出装置。[Claims] 1. A nail (3) that is moved upwardly, and a copper thread (-") that is formed as the button (3) moves up and down.
a thread loop catcher (7) for capturing the thread loop of the machine; It is arranged so that it can move up and down, and the timing is matched with the up and down movement of the needle (3).
The sewing machine is equipped with a thread take-up (10) that takes up the side thread. A thread sensing member (13) is supported in a reciprocating manner relative to the frame (1) and is always biased in a direction toward the tip (T), and the thread sensing member (13) is connected to the thread take-up (1). 10
) is moved against the biasing action based on the tension of the needle thread (T) pulled by the thread loop catcher (7); and the thread sensing member (13) is moved. The detection signal (T
The detection means (23) that generates H8) and the detection signal (TI-IS) from the detection means (23) are periodically generated to determine the occurrence of thread breakage. A thread breakage detection device characterized in that it is provided with means (25) for determining whether the thread is broken or not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15753283A JPS6048784A (en) | 1983-08-29 | 1983-08-29 | Needle yarn breakage detector of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15753283A JPS6048784A (en) | 1983-08-29 | 1983-08-29 | Needle yarn breakage detector of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6048784A true JPS6048784A (en) | 1985-03-16 |
Family
ID=15651727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15753283A Pending JPS6048784A (en) | 1983-08-29 | 1983-08-29 | Needle yarn breakage detector of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6048784A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241527A (en) * | 2019-07-16 | 2019-09-17 | 杰克缝纫机股份有限公司 | A kind of wire breakage detector and flat seaming machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5712185B2 (en) * | 1979-01-16 | 1982-03-09 |
-
1983
- 1983-08-29 JP JP15753283A patent/JPS6048784A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5712185B2 (en) * | 1979-01-16 | 1982-03-09 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241527A (en) * | 2019-07-16 | 2019-09-17 | 杰克缝纫机股份有限公司 | A kind of wire breakage detector and flat seaming machine |
| CN110241527B (en) * | 2019-07-16 | 2021-08-27 | 杰克缝纫机股份有限公司 | Broken thread detection device and flat seaming machine |
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