JPH05212183A - Automatic tension adjusting device of sewing machine - Google Patents
Automatic tension adjusting device of sewing machineInfo
- Publication number
- JPH05212183A JPH05212183A JP5640892A JP5640892A JPH05212183A JP H05212183 A JPH05212183 A JP H05212183A JP 5640892 A JP5640892 A JP 5640892A JP 5640892 A JP5640892 A JP 5640892A JP H05212183 A JPH05212183 A JP H05212183A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- sewing
- sewing machine
- pattern
- amount
- 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
- 238000009958 sewing Methods 0.000 title claims abstract description 100
- 238000004364 calculation method Methods 0.000 claims abstract description 26
- 238000003825 pressing Methods 0.000 claims abstract description 23
- 239000004744 fabric Substances 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 20
- 238000013500 data storage Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 7
- 238000005034 decoration Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 9
- 101100325756 Arabidopsis thaliana BAM5 gene Proteins 0.000 abstract description 7
- 102100031584 Cell division cycle-associated 7-like protein Human genes 0.000 abstract description 7
- 101000777638 Homo sapiens Cell division cycle-associated 7-like protein Proteins 0.000 abstract description 7
- 101150046378 RAM1 gene Proteins 0.000 abstract description 7
- 101150065817 ROM2 gene Proteins 0.000 abstract description 7
- 101100476489 Rattus norvegicus Slc20a2 gene Proteins 0.000 abstract description 7
- 238000005755 formation reaction Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 101001106432 Homo sapiens Rod outer segment membrane protein 1 Proteins 0.000 description 2
- 102100021424 Rod outer segment membrane protein 1 Human genes 0.000 description 2
- 101100524639 Toxoplasma gondii ROM3 gene Proteins 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101100524644 Toxoplasma gondii ROM4 gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ミシンの自動糸調子装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic thread tension device for a sewing machine.
【０００２】[0002]
【従来の技術】従来、ミシンの自動糸調子の技術とし
て、実公昭６０ー１８２２３号に開示されている技術が
ある。該従来技術は、針の振幅データと布送りデータに
基づき模様の種類、更にはこれらに加えて布厚、糸の太
さおよび種類の要素を加味して、必要な上糸必要量を求
め、この上糸必要量と縫いによって実際に消費される上
糸消費量の推定値とを比較器で比較して、その比較結果
に基づき糸調子器の糸への押圧力を自動調整する技術で
ある。2. Description of the Related Art Conventionally, as a technique of automatic thread tension of a sewing machine, there is a technique disclosed in Japanese Utility Model Publication No. 60-18223. According to the prior art, the necessary needle thread required amount is obtained by taking into consideration factors such as the type of the pattern based on the amplitude data of the needle and the cloth feed data, and further the cloth thickness, the thickness of the thread and the type, This is a technique for comparing the required amount of the upper thread and the estimated value of the upper thread consumption amount actually consumed by sewing with a comparator, and automatically adjusting the pressing force to the thread of the thread tension adjuster based on the comparison result. ..
【０００３】該従来技術によると、上糸消費量の測定
は、ミシン機枠に取り付けられた供給源から引き出され
た上糸が巻き付けられた回転ローラの回転速度を検出し
て、この回転速度から上糸消費量を推定するようになっ
ている。According to the prior art, the upper thread consumption is measured by detecting the rotational speed of the rotary roller around which the upper thread drawn from the supply source mounted on the machine frame of the sewing machine is wound, and from this rotational speed. It is designed to estimate the needle thread consumption.
【０００４】実際の縫いにおいて、上糸が糸調子器から
天秤側に引き込まれる上軸位相範囲は、その殆ど総てが
ミシンにより針落点に縫目が形成される糸締め位相範囲
であり、それ以前の上軸位相範囲では上糸供給源と糸調
子器との間での上糸の移動は殆ど起こらないことが確認
されている。In actual sewing, the upper shaft phase range in which the upper thread is pulled from the thread tension device to the balance side is almost the entire thread tightening phase range in which a stitch is formed at the needle entry point by the sewing machine. It has been confirmed that in the upper axis phase range before that, there is almost no movement of the upper thread between the upper thread supply source and the thread tension regulator.
【０００５】従って、本来、糸締めが終了しなければ検
出できない上糸消費量もしくはその推定値を糸締め位相
範囲の手前で検出または推定することは技術的に不可能
で矛盾点を包含しており、実用化できないという問題が
あった。Therefore, it is technically impossible to detect or estimate the upper thread consumption amount or the estimated value thereof which cannot be detected unless the thread tightening is completed before the thread tightening phase range. However, there is a problem that it cannot be put to practical use.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、前記した従
来技術の技術上の矛盾点を解決し、制御可能で良好な糸
調子で縫製できるようにした自動糸調子装置を提供する
ことである。SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic thread tensioning device which solves the technical inconsistency of the above-mentioned prior art and enables controllable threading with a good thread tension. ..
【０００７】[0007]
【課題を解決するための手段】本発明は、従来技術の問
題を解決するために、縫製ミシンにおいて、ミシンの複
数の上軸位相を検出する上軸位相検出手段と、該検出手
段により検出された上糸消費量検出位相で上糸消費量を
検出する上糸消費量検出手段と、上糸に付与する押圧力
を制御可能な糸調子器とを備えたミシンであって、選択
された縫い模様の模様データ等に基づき予め各針落間の
上糸必要量を演算する上糸必要量演算手段と演算結果を
上糸必要量記憶手段に記憶させる手段とからなる上糸必
要量演算記憶手段と、前記上糸消費量と前記上糸必要量
との差を演算する比較演算手段と、演算結果に基づき補
正データ記憶手段から該当する補正データを読み出し補
正データ一時記憶手段に格納する糸調子補正準備手段
と、前記上軸位相検出手段で検出される次の糸調子器制
御位相範囲で次の縫目形成のために前記一時記憶された
補正データにより糸調子器の前記押圧力を補正制御する
ようにしたミシンの自動糸調子装置を提供するものであ
る。SUMMARY OF THE INVENTION In order to solve the problems of the prior art, the present invention provides, in a sewing machine, upper shaft phase detecting means for detecting a plurality of upper shaft phases of the sewing machine, and detection by the detecting means. A sewing machine having an upper thread consumption detecting means for detecting the upper thread consumption in the upper thread consumption detection phase and a thread tensioner capable of controlling the pressing force applied to the upper thread, the sewing machine being selected. Needle thread necessary amount calculation storage means comprising upper thread necessary amount calculation means for calculating the necessary amount of upper thread between needle drops in advance based on pattern data etc. of the pattern and means for storing the calculation result in the required upper thread amount storage means. And a comparison calculation means for calculating the difference between the upper thread consumption amount and the required upper thread amount, and thread tension correction for reading the corresponding correction data from the correction data storage means based on the calculation result and storing it in the correction data temporary storage means. Preparation means and the upper axis phase detection Sewing machine automatic thread tensioning device for correcting and controlling the pressing force of the thread tensioner based on the temporarily stored correction data for forming the next stitch in the next thread tensioner control phase range detected by the means. Is provided.
【０００８】[0008]
【発明の作用】本発明によれば、予め演算により求めた
上糸必要量と実際に消費された上糸消費量とを比較する
ことにより、補正データ記憶手段から該当する適正な補
正データが読み出され、該補正データにより糸調子器の
上糸への押圧力を補正し、その上糸張力で次のサイクル
の縫目形成の糸締めを行うようにしたので、上糸張力
が、常時良好な状態に収束するように自動補正され、良
好な糸調子で縫製できるという作用がある。According to the present invention, by comparing the required upper thread amount calculated in advance with the actual upper thread consumption amount, the appropriate correction data is read from the correction data storage means. The pressure applied to the needle thread of the thread tension regulator is corrected based on the correction data, and the needle thread tension is used to tighten the thread for stitch formation in the next cycle. Therefore, the needle thread tension is always good. It is automatically corrected so that it can be converged into a proper state, and there is an effect that sewing can be performed with a good thread tension.
【０００９】[0009]
（１）構成 以下、本発明を実施例により説明する。まず、図２を参
照しながら上糸の経路の概略について説明する。ミシン
頭部にセットされた上糸の供給源としての糸駒１から引
き出された上糸Ｔは、案内部２、３、糸調子器１０、上
糸消費量検出手段２０の検出輪２２、折り曲げ案内部４
の糸取りばね（図示せず）、天秤５、糸案内部６および
針棒糸掛け７等を経てミシン針８の針穴８ａへと導かれ
る。(1) Configuration Hereinafter, the present invention will be described with reference to examples. First, the outline of the upper yarn path will be described with reference to FIG. The needle thread T pulled out from the thread spool 1 as the source of the needle thread set on the sewing machine head is guided by the guide portions 2 and 3, the thread tension adjuster 10, the detection wheel 22 of the needle thread consumption detecting means 20, and the bending. Information section 4
The thread take-up spring (not shown), the balance 5, the thread guide portion 6, the needle bar thread hook 7 and the like are guided to the needle hole 8a of the sewing machine needle 8.
【００１０】次に、図３を参照しながら糸調子器および
上糸消費量検出手段の構成について説明する。図３にお
いて、糸調子器１０は、糸調子軸１１に固定糸調子皿１
２および可動糸調子皿１３が配設され、可動糸調子皿１
３は、糸調子軸１１に配設されたばね１４により固定糸
調子皿１２に押し付けられている。糸調子軸１１には、
ピン部１５ａを備えた調節部材１５がスライド可能に配
設され、ピン部１５ａは糸調子制御用パルスモータＴＭ
の出力軸１６に固着された制御リンク１７の長溝部１７
ａと係合している。止め部材１８は、糸調子軸１１に固
着され、調節部材１５の可動範囲を制限する。Next, the configurations of the thread tension regulator and the upper thread consumption amount detecting means will be described with reference to FIG. In FIG. 3, the thread tension device 10 includes a thread tension shaft 11 and a fixed thread tension disc 1.
2 and the movable thread tension tray 13 are arranged, and the movable thread tension tray 1 is provided.
3 is pressed against the fixed thread tension disc 12 by a spring 14 arranged on the thread tension shaft 11. In the thread tension shaft 11,
An adjusting member 15 having a pin portion 15a is slidably arranged, and the pin portion 15a is a pulse motor TM for thread tension control.
Slot 17 of the control link 17 fixed to the output shaft 16 of the
engaged with a. The stop member 18 is fixed to the thread tension shaft 11 and limits the movable range of the adjusting member 15.
【００１１】糸調子器１０の上糸Ｔへの押圧力の制御
は、出力軸１６の回動制御により、制御リンク１７、調
節部材１５を介してばね１４の圧縮長さを制御して、固
定糸調子皿１２に対する可動糸調子皿１３の押圧力を制
御することにより行われる。The pressing force applied to the needle thread T of the thread tension regulator 10 is controlled by rotating the output shaft 16 and controlling the compression length of the spring 14 via the control link 17 and the adjusting member 15. This is performed by controlling the pressing force of the movable thread tension disc 13 against the thread tension disc 12.
【００１２】糸駒１から引き出された上糸Ｔは、糸調子
器１０に案内され、案内ピン２１、上糸消費量検出手段
２０の検出輪２２の溝２２ａおよび案内ピン２３に案内
され、更に前記したように必要な他の案内部材等に案内
され、天秤５、ミシン針８へと導かれる。The upper thread T pulled out from the thread spool 1 is guided to the thread tensioner 10, and is guided to the guide pin 21, the groove 22a of the detection wheel 22 of the upper thread consumption amount detecting means 20 and the guide pin 23, and further. As described above, it is guided by other necessary guide members and the like, and is guided to the balance 5 and the sewing machine needle 8.
【００１３】上糸消費量検出手段２０の検出輪２２は、
遮光板２４と共にミシンの機枠に回動自在に支持された
軸２５に固着され、軽微なトルクにより回動可能となっ
ており、軸２５に配設されたねじりコイルばね２６によ
り図３の時計方向に付勢され、検出輪２２に外力が作用
しない場合は、遮光板２４が、同図の２点鎖線で示すよ
うにミシンの機枠に配設されたピン２７に係止されてい
る。The detection wheel 22 of the upper thread consumption amount detecting means 20 is
It is fixed to a shaft 25 that is rotatably supported by the machine frame of the sewing machine together with the light shielding plate 24, and can be rotated by a slight torque. The torsion coil spring 26 disposed on the shaft 25 causes the timepiece of FIG. When the detection wheel 22 is biased in the direction and no external force is applied to the detection wheel 22, the light shielding plate 24 is locked by the pin 27 arranged on the machine frame of the sewing machine as shown by the two-dot chain line in the figure.
【００１４】糸調子器１０が上糸Ｔに縫いに必要なある
一定以上の押圧力を与え、天秤５の上昇により、縫目形
成のための糸締めが行われ、上糸Ｔが糸調子器１０を越
えて天秤５の側に引き込まれると、検出輪２２は溝部２
２ａに案内された上糸Ｔの摩擦力により、反時計方向に
ねじりコイルばね２６の付勢力に抗して遮光板２５を伴
って回動させられる。The thread tension device 10 applies a pressing force to the upper thread T above a certain level necessary for sewing, and the balance 5 is raised to tighten the thread for forming a stitch, and the upper thread T is thread tensioned. When it is pulled over 10 to the side of the balance 5, the detection wheel 22 moves to the groove 2
Due to the frictional force of the upper thread T guided by the 2a, the light shielding plate 25 is rotated counterclockwise against the biasing force of the torsion coil spring 26.
【００１５】図５の後記する糸締め開始位相Ａの次のサ
イクルの糸ゆるめ位相で、糸調子器１０が糸ゆるめ制御
され、上糸Ｔへの押圧力がある一定の値以下になると、
検出輪２２と上糸Ｔとの摩擦力が微弱となり、ばね２６
の時計方向への付勢力により、検出輪２２は遮光板２４
を伴って、遮光板２４がピン２７に係止させられる初期
状態となる。In the thread loosening phase of the cycle next to the thread tightening start phase A, which will be described later with reference to FIG. 5, when the thread tension controller 10 controls the thread loosening and the pressing force on the upper thread T becomes a certain value or less,
The frictional force between the detection wheel 22 and the upper thread T becomes weak, and the spring 26
Due to the clockwise urging force of the
Accordingly, the light shielding plate 24 is brought into an initial state in which it is locked by the pin 27.
【００１６】遮光板２４の手前には、発光素子３０が配
設され、遮光板２４を挟んで光導部材３１が配設されて
いる。光導部材３１は、複数のガイド穴３１ａにそれぞ
れ細いガラスファイバー３２の先端を植毛形に密に挿入
して構成されている。光導部材３１から引き出されたガ
ラスファイバー３２は、その後端部がこれらを束ねる収
束部材３３まで導かれ、発光素子３０からの光を集光レ
ンズ３４を介して受光素子３５で受光するようになって
いる。A light emitting element 30 is arranged in front of the light shielding plate 24, and a light guide member 31 is arranged with the light shielding plate 24 interposed therebetween. The light guide member 31 is configured by densely inserting the tips of the thin glass fibers 32 into a plurality of guide holes 31a in a flocked shape. The glass fiber 32 drawn out from the light guide member 31 is guided to the converging member 33 that bundles the glass fiber 32 at the rear end, and the light from the light emitting element 30 is received by the light receiving element 35 via the condenser lens 34. There is.
【００１７】検出輪２２の初期位置においては、遮光板
２４はピン２７に係止されており、この位置で遮光板２
４は、発光素子３０の光を完全に遮光し、また縫目形成
のための糸締め時には、消費された上糸消費量に応じて
遮光板２４による光導部材３１に対する遮光の割合が変
化するので、受光素子３５でその変化を電流で取り出
し、電圧に変換して増幅し、Ａ／Ｄ変換器（図示せず）
でデジタルの上糸消費量のデータとして中央演算装置Ｃ
ＰＵに送る。上糸消費量と遮光板２４による光導部材３
１に対する遮光の割合との関係は、予め数多くの実験に
より求められており、遮光の割合から上糸消費量を検出
することができるようになっている。At the initial position of the detection wheel 22, the light shield plate 24 is locked to the pin 27, and at this position the light shield plate 2 is held.
No. 4 completely shields the light of the light emitting element 30, and at the time of tightening the thread for forming the stitch, the light shielding ratio of the light shielding plate 24 to the light guide member 31 changes according to the consumed upper thread consumption amount. , The light-receiving element 35 extracts the change with a current, converts it into a voltage and amplifies it, and an A / D converter (not shown)
The central processing unit C is used as digital data for the upper thread consumption.
Send to PU. Light guide member 3 by upper thread consumption and light shield 24
The relationship with the ratio of shading to 1 has been obtained in advance by many experiments, and the upper thread consumption amount can be detected from the ratio of shading.
【００１８】（２）ミシンの制御部 次に、ミシンの制御部の構成について、図１を参照しな
がら説明する。中央演算装置ＣＰＵには、ミシンの縫い
模様を選択するための模様選択手段４０、ミシンの運転
および停止を指令するスタート／ストップスイッチ４
１、ミシンの上軸の後記する複数の回転位相を検出する
上軸位相検出手段４２、縫製時の上糸消費量を検出する
ための上糸消費量検出手段２０が接続されている。(2) Sewing Machine Control Unit Next, the structure of the sewing machine control unit will be described with reference to FIG. The central processing unit CPU is provided with a pattern selecting means 40 for selecting a sewing pattern of the sewing machine and a start / stop switch 4 for instructing the operation and stop of the sewing machine.
1, upper shaft phase detecting means 42 for detecting a plurality of rotational phases, which will be described later, of the upper shaft of the sewing machine, and upper thread consumption detecting means 20 for detecting the upper thread consumption at the time of sewing are connected.
【００１９】更に、中央演算装置ＣＰＵには、縫製する
布の厚さに応じて手動操作可能なマニュアルスイッチ４
３が接続されている。即ち、本実施例の自動糸調子装置
は標準的な布厚の加工布を対象としており、このマニュ
アルスイッチ４３を操作しない場合は、標準の布厚を想
定した糸調子制御が行われ、対象となる加工布が標準よ
り厚い場合、またその逆に標準より薄い場合には、手動
操作によりそれらを指定して、より好ましい糸調子制御
を行うためのものである。Further, the central processing unit CPU has a manual switch 4 which can be manually operated according to the thickness of the cloth to be sewn.
3 is connected. That is, the automatic thread tension device of the present embodiment is intended for a work cloth having a standard cloth thickness, and when the manual switch 43 is not operated, the thread tension control assuming the standard cloth thickness is performed, When the resulting work cloth is thicker than the standard and vice versa, it is for manually designating them to perform more preferable thread tension control.
【００２０】更に、中央演算装置ＣＰＵには、リード・
オンリー・メモリＲＯＭおよびランダム・アクセス・メモ
リＲＡＭが接続されている。Further, the central processing unit CPU has a lead
Only memory ROM and random access memory RAM are connected.
【００２１】リード・オンリー・メモリＲＯＭは、複数の
記憶エリアを備えており、便宜上それらを独立の構成要
素として示すと、それらは糸調子制御を含むミシン全体
の制御を行うための制御プログラムが記憶された制御プ
ログラム記憶手段ＲＯＭ１、糸調子器１０の制御をする
ための補正データが記憶された補正データ記憶手段ＲＯ
Ｍ２、ミシンの縫い模様のための縫い模様データが記憶
された模様データ記憶手段ＲＯＭ３、縫い模様の表示デ
ータが記憶された表示データ記憶手段ＲＯＭ４等から構
成されている。The read-only memory ROM is provided with a plurality of storage areas. For convenience of description, these are shown as independent components, and they are stored with a control program for controlling the entire sewing machine including thread tension control. Correction program storage means ROM1 and correction data storage means RO in which correction data for controlling the thread tension device 10 are stored.
M2, pattern data storage means ROM3 in which sewing pattern data for sewing patterns of the sewing machine are stored, display data storage means ROM4 in which sewing pattern display data is stored, and the like.
【００２２】ランダム・アクセス・メモリＲＡＭは、複数
の記憶エリアを備えており、便宜上それらを独立の構成
要素として示すと、それらは選択された縫い模様の模様
データおよび予め準備された布厚に基づき演算された各
針落間の上糸必要量データを記憶する上糸必要量記憶手
段ＲＡＭ１、縫製時に補正データ記憶手段ＲＯＭ１から
読み出された条件に該当する補正データを一時記憶する
補正データ一時記憶手段ＲＡＭ２および制御プログラム
実行処理時に発生する各種データ等を一時記憶する作業
用メモリＲＡＭ３等から構成されている。The random access memory RAM is provided with a plurality of storage areas, and for convenience, they are shown as independent components, which are based on the pattern data of the selected sewing pattern and the cloth thickness prepared in advance. Necessary needle thread amount storing means RAM1 for storing the calculated necessary needle thread amount data between the respective needle drops, and correction data temporary storage for temporarily storing the correction data corresponding to the condition read from the correction data storing means ROM1 at the time of sewing. It comprises a means RAM 2 and a work memory RAM 3 for temporarily storing various data and the like generated during the control program execution processing.
【００２３】中央演算装置ＣＰＵには、更に表示制御回
路ＬＣＤＣを介して表示手段としての液晶表示部ＬＣＤ
が接続され、縫いに関連する各種の表示を行うようにな
っている。The central processing unit CPU further has a liquid crystal display unit LCD as a display means via a display control circuit LCDC.
Is connected and various displays related to sewing are displayed.
【００２４】振幅用パルスモータＸＭ、送り用パルスモ
ータＹＭ、ミシンモータＺＭおよび糸調子制御パルスモ
ータＴＭは、それぞれこの順に振幅用パルスモータドラ
イバＸＤＶ、送り用パルスモータドライバＹＤＶ、ミシ
ンモータドライバＺＤＶおよび糸調子器制御用パルスモ
ータＴＭ（以後糸調子モータＴＭ）のドライバＴＤＶを
介して中央演算装置ＣＰＵに接続されている。The amplitude pulse motor XM, the feed pulse motor YM, the sewing machine motor ZM and the thread tension control pulse motor TM are respectively in this order the amplitude pulse motor driver XDV, the feed pulse motor driver YDV, the sewing machine motor driver ZDV and the thread. It is connected to the central processing unit CPU via a driver TDV of a tension motor controlling pulse motor TM (hereinafter, thread tension motor TM).
【００２５】振幅用パルスモータＸＭおよび送り用パル
スモータＹＭは、ミシンモータＺＭによるミシンの運転
時に上軸位相検出手段からの上軸パルスに同期してミシ
ンの振幅および送り装置の夫々の駆動手段を制御し、糸
調子モータＴＭは、後記するように上軸位相検出手段４
２で検出される各位相で糸調子器１０の糸ゆるめ制御お
よび押圧力の制御を行う。The pulse motor XM for amplitude and the pulse motor YM for feed are synchronized with the upper shaft pulse from the upper shaft phase detecting means during the operation of the sewing machine by the sewing machine motor ZM, and the driving means of the sewing machine and the respective driving means of the feeding device are controlled. The thread tension motor TM is controlled by the upper shaft phase detecting means 4 as described later.
The thread loosening control and the pressing force control of the thread tension regulator 10 are performed at each phase detected in 2.
【００２６】（３）上糸必要量の演算方法 次に、上糸必要量の演算方法について説明する。まず縫
い模様を直線縫い等、布同士を接合するために縫い強度
を目的とする縫い模様群とワンポイント縫、文字縫い
等、装飾を目的とする縫い模様群に分け、標準的な布厚
の布を想定して、縫い強度を目的とする縫い模様群に対
しては、上糸と下糸とが重ね合わせた布の中央付近で交
差するように、また装飾を目的とする縫い模様群に対し
ては上糸が布の裏面付近で下糸と交差するように上糸消
費量を演算する。(3) Calculating Method of Needle Needle Needle Next, a method of calculating the required needle thread will be described. First, the sewing pattern is divided into a sewing pattern group for the purpose of sewing strength such as straight line stitching and a sewing pattern group for decorative purposes such as one-point stitching and letter stitching to join the cloths together. Assuming a cloth, for sewing pattern groups for the purpose of sewing strength, make sure that the upper thread and the lower thread intersect in the vicinity of the center of the cloth and the sewing pattern group for decoration purposes. On the other hand, the upper thread consumption amount is calculated so that the upper thread intersects with the lower thread near the back surface of the cloth.
【００２７】即ち、上糸必要量の演算式は、縫い強度を
目的とする縫い模様群の縫い模様に対しては、まず直線
縫部分については送り量、ジグザグ縫の部分については
送り量の２乗と振幅量の２乗の和の平方根を求め、これ
らの値にそれぞれ布厚の値を加えた式である。That is, for the sewing pattern of the sewing pattern group for the purpose of sewing strength, first, the upper thread necessary amount calculation formula is the feed amount 2 for the straight stitch portion and the feed amount 2 for the zigzag stitch portion. This is an expression in which the square root of the sum of the square of the square and the amplitude amount is obtained, and the value of the cloth thickness is added to each of these values.
【００２８】装飾を目的とする縫い模様群の縫い模様に
対する上糸必要量の演算式は、先と同様にまず直線縫部
分については送り量、ジグザグ縫の部分については送り
量の２乗と振幅量の２乗の和の平方根を求め、これらの
値にそれぞれ布厚の２倍の値を加えた式である。Similar to the above, the arithmetic expression of the needle thread required amount for the sewing pattern of the sewing pattern group for the purpose of decoration is as follows: first, the feed amount for the straight stitch portion, the square of the feed amount and the amplitude for the zigzag stitch portion. This is an equation in which the square root of the sum of the squares of the quantities is obtained, and a value twice the cloth thickness is added to each of these values.
【００２９】演算に用いる布厚データは、標準の布厚デ
ータの他に薄物および厚物に対する布厚データが準備さ
れており、マニュアルスイッチ４３を操作しない場合
は、標準の布厚データが布厚データとして演算に用いら
れ、マニュアルスイッチ４３を操作して、薄物または厚
物を指定すると薄物または厚物に対する布厚データが演
算に用いられる。As the cloth thickness data used for the calculation, in addition to the standard cloth thickness data, the cloth thickness data for thin and thick materials are prepared. When the manual switch 43 is not operated, the standard cloth thickness data is the cloth thickness data. The data is used for calculation, and when the manual switch 43 is operated to specify a thin material or a thick material, cloth thickness data for the thin material or the thick material is used for calculation.
【００３０】補正データ記憶手段ＲＯＭ２に記憶された
補正データは、実際に消費された上糸消費量と演算によ
り求め上糸必要量記憶手段ＲＡＭ１に記憶された上糸必
要量との差の値から、補正データ記憶手段ＲＯＭ２を参
照して該当する補正データを読み出し、補正データ一時
記憶手段ＲＡＭ２に格納し、次サイクルの縫目形成のた
めの糸締めに先立って糸調子器１０の押圧力制御の補正
に使用する。The correction data stored in the correction data storage means ROM2 is obtained from the value of the difference between the actually consumed upper thread consumption amount and the upper thread necessary amount stored in the upper thread necessary amount storage means RAM1. The corresponding correction data is read out by referring to the correction data storage means ROM2, stored in the correction data temporary storage means RAM2, and the pressing force control of the thread tension regulator 10 is performed prior to thread tightening for stitch formation in the next cycle. Used for correction.
【００３１】補正データ記憶手段ＲＯＭ２に記憶された
補正データに対して、実際に消費された上糸消費量と演
算により求め上糸必要量記憶手段ＲＡＭ１に記憶された
上糸必要量との差の値が、例えばプラス側であれば、現
在の上糸張力が下糸張力に対して弱いとして、次サイク
ルの縫目形成の糸締め時に先立って、糸調子器１０によ
る上糸の押圧力を現状よりも強くなるように制御するた
めの補正データが指定され、その逆に差の値がマイナス
側であれば、糸調子器１０による上糸の押圧力を現状よ
りも強くなるように制御するための補正データが指定さ
れる。With respect to the correction data stored in the correction data storage means ROM2, the difference between the actually consumed upper thread consumption amount and the required upper thread amount stored in the required upper thread required amount storage means RAM1 is calculated. If the value is, for example, on the positive side, it is assumed that the current upper thread tension is weaker than the lower thread tension, and the upper thread pressing force by the thread tensioner 10 is currently measured prior to thread tightening in the formation of stitches in the next cycle. If the correction data for controlling to be stronger than that is specified, and conversely the value of the difference is on the negative side, in order to control the pressing force of the upper thread by the thread tensioner 10 to be stronger than the present condition. Correction data is designated.
【００３２】（４）各上軸回転位相 次に、図５を参照しながら本縫いミシンの各上軸回転位
相について説明する。同図において、横軸はミシンの上
軸回転位相を示し、曲線ａは針棒上下量でミシン針８の
針穴上端位置にオフセットした運動軌跡であり、曲線ｂ
は天秤上下量を示す。針棒上下量および天秤上下量は共
に同図の縦軸の寸法で表示されるが、これらの縦軸の寸
法は、それぞれ基準点および倍率が異なる。また同図は
送り等その他の軌跡の図示は省略してある。(4) Each upper shaft rotation phase Next, each upper shaft rotation phase of the lockstitch sewing machine will be described with reference to FIG. In the figure, the horizontal axis represents the upper axis rotation phase of the sewing machine, the curve a is a motion locus offset to the upper end position of the needle hole of the sewing machine needle 8 by the vertical amount of the needle bar, and the curve b.
Indicates the vertical amount of the balance. Both the vertical amount of the needle bar and the vertical amount of the balance are displayed by the dimension of the vertical axis in the figure, but the dimension of the vertical axis has a different reference point and magnification. Further, in the same figure, illustration of other trajectories such as feeding is omitted.
【００３３】ここで、縫いのプロセスを簡単に説明す
る。針棒上死点付近から、ミシンの運転を開始すると、
針棒が下降して、一旦上昇した天秤５が下降に転じ、後
記する糸ゆるめ位相Ｃを過ぎ、天秤上糸供給量が次第に
増加して行き、針棒に取り付けられたミシン針８が加工
布を貫通し、針棒が下死点から上昇に転じ、釜の剣先が
ミシン針８に形成された上糸ループを捕捉し、後記する
糸調子器制御位相Ｄを過ぎ、相針棒上死点を過ぎて、天
秤５が上昇を続け、天秤５が天秤上死点の少し手前の糸
締め開始位相Ａから糸締めを開始し、天秤上死点付近の
位相で糸締めが完了し縫目が形成される。Here, the sewing process will be briefly described. When you start the sewing machine from the vicinity of the top dead center of the needle bar,
The needle bar descends, the balance 5 which once rises turns to descend, passes the thread loosening phase C described later, and the thread amount on the balance gradually increases, and the sewing machine needle 8 attached to the needle bar becomes the work cloth. , The needle bar starts to rise from the bottom dead center, the hook point of the hook catches the upper thread loop formed on the sewing machine needle 8, passes the thread tensioner control phase D described later, and the phase needle bar top dead center. After that, the balance 5 continues to move upward, and the balance 5 starts thread tightening from the thread tightening start phase A slightly before the top dead center of the balance, and the thread tightening is completed at a phase near the top dead center of the balance and the stitch It is formed.
【００３４】この糸締め開始位相Ａにおける２針目以後
の糸締めによる縫目形成時に、糸締め開始位相Ａの後ろ
の上糸消費量検出位相Ｂで検出される上糸消費量と、予
め演算された上糸必要量との差が演算され、この差の値
の符号および大小から該当する補正データが補正データ
記憶手段ＲＯＭ２から読み出され、補正データ一時記憶
手段ＲＡＭ２に格納され、次サイクルの縫目形成のため
の糸締めに先立って糸調子器１０の制御の補正データと
して使用される。At the time of forming a stitch by thread tightening after the second stitch in the thread tightening start phase A, the upper thread consumption detected in the upper thread consumption detection phase B after the thread tightening start phase A is calculated in advance. The difference from the required needle thread amount is calculated, and the corresponding correction data is read from the correction data storage means ROM2 based on the sign and the magnitude of this difference value, stored in the correction data temporary storage means RAM2, and sewn in the next cycle. It is used as correction data for the control of the thread tension regulator 10 prior to thread tightening for forming stitches.
【００３５】上軸位相検出手段４２により、糸ゆるめ位
相Ｃが検出されると、糸調子モータＴＭの制御により、
糸ゆるめ制御が行われ、糸調子器１０による上糸Ｔへの
押圧力がある一定の値以下に制御される。When the upper shaft phase detecting means 42 detects the thread loosening phase C, the thread tension motor TM controls the thread loosening phase C.
Thread loosening control is performed, and the pressing force of the thread tension unit 10 on the upper thread T is controlled to be a certain value or less.
【００３６】この糸ゆるめ制御が行われると、前サイク
ルの縫目形成の糸締め時に上糸供給源から糸調子器１０
を通過して供給された上糸Ｔにより反時計方向に回動さ
せられていた検出輪２２と上糸Ｔとの摩擦力が減少し、
ねじりコイルばね２６により検出輪２２が遮光板２４を
伴って図３の時計方向に回動させられ、遮光板２４がピ
ン２７に係止させられる初期位置に復帰し、遮光板２４
が光導部材３１を発光素子３０から遮断し、次サイクル
の糸締め時における上糸消費量の検出の準備が整う。When this thread loosening control is performed, the thread tension controller 10 is operated from the upper thread supply source at the time of thread tightening for forming the stitch in the previous cycle.
The frictional force between the upper thread T and the detection wheel 22 that has been rotated counterclockwise by the upper thread T that has passed through the
The torsion coil spring 26 rotates the detection wheel 22 together with the light shield plate 24 in the clockwise direction in FIG. 3, and the light shield plate 24 returns to the initial position where it is locked by the pin 27.
Shuts off the light-guiding member 31 from the light emitting element 30, and the preparation for detecting the upper thread consumption amount at the time of thread tightening in the next cycle is completed.
【００３７】糸調子器制御位相Ｄが検出されると、糸調
子モータＴＭは、補正データ一時記憶手段ＲＡＭ２に記
憶された補正データに基づき糸調子器１０の制御を開始
する。補正データが補正データ一時記憶手段ＲＡＭ２に
格納されていない第２針目までの縫目に対する糸調子器
１０の制御データは、上糸Ｔに標準的な押圧力を与える
デフォルト値のデータとして与えられる。When the thread tension control phase D is detected, the thread tension motor TM starts controlling the thread tension controller 10 based on the correction data stored in the correction data temporary storage means RAM2. The control data of the thread tension adjuster 10 for the stitches up to the second stitch, the correction data of which is not stored in the correction data temporary storage means RAM2, is given as default value data for applying a standard pressing force to the needle thread T.
【００３８】（５）制御手順 以下、図４を参照しながら本実施例の自動糸調子装置の
制御手順について説明する。同図において、Ｓｎ（ｎ＝
１、２、３・・・）は、各制御の処理のステップを示
す。(5) Control Procedure The control procedure of the automatic thread tension device of this embodiment will be described below with reference to FIG. In the figure, Sn (n =
, 1, 2, 3 ...) Indicate the processing steps of each control.
【００３９】Ｓ１、Ｓ２ ミシンの電源を投入すると、プログラムがスタートし、
Ｓ１で模様選択手段４０で所望の縫い模様を選択する
と、Ｓ２で選択された縫い模様の模様データおよび予め
準備された標準的な布厚データとから各針落間の上糸必
要量が演算され、上糸必要量記憶手段ＲＡＭ１に格納さ
れる。この処理ステップは、プログラムによる機能実現
手段としての上糸必要量演算記憶手段である。When the power of the sewing machines S1 and S2 is turned on, the program starts,
When a desired sewing pattern is selected by the pattern selecting means 40 in S1, the required needle thread amount between needle drop points is calculated from the pattern data of the sewing pattern selected in S2 and the standard cloth thickness data prepared in advance. The upper thread necessary amount storage means RAM1 is stored. This processing step is a needle thread required amount calculation storage means as a function realizing means by a program.
【００４０】Ｓ３ スタート／ストップスイッチ４１のキー入力待ちとな
り、スタートストップスイッチ４１によるスタート指令
があると、ミシンが運転を開始する。S3 Waiting for key input of the start / stop switch 41, and when there is a start command from the start / stop switch 41, the sewing machine starts operation.
【００４１】Ｓ４、Ｓ５ 上軸位相検出手段４２により図５の符号Ｃで示す糸ゆる
め位相になると、Ｓ５で糸調子器１０による上糸Ｔへの
押圧力がある一定の弱い値に制御される。糸調子器１０
の制御は糸調子モータＴＭを制御して行う。この糸ゆる
め制御は、縫目形成に先立って行われ、上糸消費量検出
手段２０の検出輪２２を初期状態に復帰させるための制
御である。S4, S5 When the upper shaft phase detecting means 42 reaches the thread loosening phase indicated by the symbol C in FIG. 5, the pressing force of the thread tensioner 10 on the upper thread T is controlled to a certain weak value in S5. .. Thread tension device 10
Is controlled by controlling the thread tension motor TM. This thread loosening control is performed prior to the formation of stitches, and is control for returning the detection wheel 22 of the needle thread consumption amount detecting means 20 to the initial state.
【００４２】Ｓ６、Ｓ７ Ｓ６で上軸位相検出手段２０からの糸調子器制御位相Ｄ
になったかが判別される。図５のＤで示す糸調子器制御
位相となると、Ｓ７で補正データに基づき糸調子モータ
ＴＭの制御により糸調子器１０の押圧力の制御が行われ
る。この制御が行われるのは、第２針の縫目が形成され
た後、第３針の縫目が形成される前からであり、以後同
様に加圧力の制御が続けられる。第２針の縫目形成まで
の糸調子器は、デフォルト値により、上糸Ｔに標準的な
上糸張力が作用するように制御される。S6, S7 In S6, the thread tension regulator control phase D from the upper shaft phase detecting means 20.
Is determined. When the thread tensioner control phase shown by D in FIG. 5 is reached, the pressing force of the thread tensioner 10 is controlled by the control of the thread tension motor TM based on the correction data in S7. This control is performed after the seam of the second needle is formed and before the seam of the third needle is formed, and thereafter, the control of the pressing force is similarly continued. The thread tensioner until the stitch formation of the second needle is controlled such that the standard upper thread tension acts on the upper thread T by the default value.
【００４３】Ｓ８、Ｓ９ Ｓ８で、糸締め開始位相Ａになったかが判別される。図
５の符号Ａで示す糸締め開始位相になると、Ｓ９で糸締
めが実行されて縫目が形成され、上糸Ｔが糸調子器１０
を通過して天秤５側へ供給され、検出輪２２に上糸Ｔの
摩擦力が作用し、検出輪２２が、ねじりコイルばね２６
の付勢力に抗して遮光板２４と共に上糸繰り出し量に応
じた量だけ反時計方向に回動させられる。S8, S9 At S8, it is judged if the thread tightening start phase A has been reached. When the thread tightening start phase indicated by the symbol A in FIG. 5 is reached, thread tightening is performed in S9 to form a stitch, and the upper thread T is threaded by the thread tension adjuster 10.
And is supplied to the balance 5 side, the friction force of the upper thread T acts on the detection wheel 22, and the detection wheel 22 turns the torsion coil spring 26.
The light-shielding plate 24 is rotated counterclockwise by an amount corresponding to the upper thread feeding amount against the biasing force.
【００４４】Ｓ１０、Ｓ１１ Ｓ１０で、上糸消費量検出位相Ｂになったかが判別され
る。図７の符号Ｂで示す位相になると、Ｓ１１で上糸消
費量検出手段２０により上糸消費量の検出が行われる。S10, S11 At S10, it is judged if the upper thread consumption amount detection phase B has been reached. When the phase shown by the symbol B in FIG. 7 is reached, the upper thread consumption amount detection means 20 detects the upper thread consumption amount in S11.
【００４５】Ｓ１２ 検出された上糸消費量と上糸必要量記憶手段ＲＡＭ１に
記憶された上糸必要量との差の演算が行われる。この処
理ステップはプログラムによる機能実現手段としての比
較演算手段である。S12 The difference between the detected upper thread consumption amount and the required upper thread amount stored in the upper thread required amount storage means RAM1 is calculated. This processing step is a comparison calculation means as a function realizing means by a program.
【００４６】Ｓ１３ 上糸消費量と上糸消費量との差の値の符号および大小か
ら補正データ記憶手段ＲＯＭ２から、該当する糸調子器
の補正データが読み出され、読み出され補正データは補
正データ一時記憶手段ＲＡＭ２に一時記憶される。この
処理ステップはプログラムによる機能実現手段としての
糸調子補正準備手段である。この補正データは次サイク
ルの縫目形成の糸締め時に先立って糸調子器１０を制御
する補正データとして利用される。S13 The correction data of the corresponding thread tension regulator is read from the correction data storage means ROM2 based on the sign and the magnitude of the difference between the upper thread consumption amount and the upper thread consumption amount, and the read correction data is corrected. The data is temporarily stored in the data temporary storage means RAM2. This processing step is a thread tension correction preparation means as a function realizing means by a program. This correction data is used as correction data for controlling the thread tension regulator 10 prior to thread tightening for stitch formation in the next cycle.
【００４７】Ｓ１４ ミシンの運転を停止する停止指令があるまで、Ｓ４から
の処理が繰り返し実行され、上糸と下糸とが好ましい交
差状態で縫製が行われる。停止指令があると、このフロ
ーチャートから抜ける。S14 The processing from S4 is repeatedly executed until the stop command for stopping the operation of the sewing machine is executed, and the sewing is performed in a preferable intersecting state of the upper thread and the lower thread. When there is a stop command, this flowchart is exited.
【００４８】[0048]
【発明の効果】以上のように本発明によれば、予め演算
により求めた上糸必要量と実際に消費された上糸消費量
とを比較することにより、補正データ記憶手段から該当
する適正な補正データが読み出され、該補正データによ
り糸調子器の上糸への押圧力を補正し、その上糸張力で
次のサイクルの縫目形成の糸締めを行うようにしたの
で、上糸張力が、常時良好な状態に収束するように自動
補正され、良好な糸調子で縫製が行えるという効果が得
られる。As described above, according to the present invention, by comparing the required amount of the upper thread obtained by the calculation in advance with the actually consumed amount of the upper thread, it is possible to determine the appropriate value from the correction data storage means. The correction data is read out, the pressing force to the needle thread of the thread tension regulator is corrected by the correction data, and the thread tension for the stitch formation of the next cycle is performed by the needle thread tension. However, it is automatically corrected so that it always converges to a good state, and the effect is obtained that sewing can be performed with a good thread tension.
【図１】 制御回路のブロック図FIG. 1 is a block diagram of a control circuit
【図２】 上糸の経路を示すミシン主要部の斜視図FIG. 2 is a perspective view of the main part of the sewing machine showing the path of the upper thread.
【図３】 糸調子器および上糸消費量検出手段の主要部
を示す斜視図FIG. 3 is a perspective view showing the main parts of the thread tension regulator and the needle thread consumption amount detecting means.
【図４】 制御の処理手順を示すフローチャートFIG. 4 is a flowchart showing a control processing procedure.
【図５】 ミシンのモーションダイヤグラムの一部を示
す図FIG. 5 is a diagram showing a part of a motion diagram of the sewing machine.
８ 針 １０ 糸調子器 ２０ 上糸消費量検出手段 ４０ 模様選択手段 ４２ 上軸位相検出手段 ４３ マニュアルスイッチ Ｂ 上糸消費量検出位相 Ｄ 糸調子器制御位相 ＲＡＭ１ 上糸必要量記憶手段 ＲＡＭ２ 補正データ一時記憶手段 ＲＯＭ２ 補正データ記憶手段 ＲＯＭ３ 模様データ記憶手段 Ｓ２ 上糸必要量演算記憶手段 Ｓ１２ 比較演算手段 Ｓ１３ 糸調子補正準備手段 8 needles 10 thread tensioner 20 needle thread consumption amount detecting means 40 pattern selecting means 42 upper shaft phase detecting means 43 manual switch B needle thread consumption amount detecting phase D thread tensioner control phase RAM1 needle thread necessary amount storing means RAM2 correction data temporary Storage means ROM2 Correction data storage means ROM3 Pattern data storage means S2 Needle thread required amount calculation storage means S12 Comparison calculation means S13 Thread tension correction preparation means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 住 吉 浩 司 東京都中央区京橋３丁目１番１号 蛇の目 ミシン工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Sumiyoshi 3-1-1, Kyobashi, Chuo-ku, Tokyo Janome Sewing Machine Co., Ltd.
Claims (5)
タが記憶された模様データ記憶手段と、所望の縫い模様
を選択するための模様選択手段と、上下動する針を有し
選択された縫い模様に対する模様データに基づきミシン
の上軸回転に同期して加工布に縫目を形成する縫目形成
機構とを備えたミシンにおいて、ミシンの複数の上軸位
相を検出する上軸位相検出手段と、該検出手段により検
出された上糸消費量検出位相で上糸消費量を検出する上
糸消費量検出手段と、上糸に付与する押圧力を制御可能
な糸調子器とを備えたミシンであって、選択された縫い
模様の模様データ等に基づき予め各針落間の上糸必要量
を演算する上糸必要量演算手段と演算結果を上糸必要量
記憶手段に記憶させる手段とからなる上糸必要量演算記
憶手段と、前記上糸消費量と前記上糸必要量との差を演
算する比較演算手段と、演算結果に基づき補正データ記
憶手段から該当する補正データを読み出し補正データ一
時記憶手段に格納する糸調子補正準備手段とを有し、前
記上軸位相検出手段で検出される次の糸調子器制御位相
で次サイクルの糸締めのために前記一時記憶された補正
データにより糸調子器の前記押圧力を補正制御すること
を特徴とするミシンの自動糸調子装置。1. A pattern data storage means for storing pattern data for a plurality of sewing patterns of a sewing machine, a pattern selecting means for selecting a desired sewing pattern, and a selected sewing pattern having needles that move up and down. In a sewing machine including a stitch forming mechanism that forms a stitch on a work cloth in synchronism with the upper axis rotation of the sewing machine based on the pattern data for the upper axis phase detecting means for detecting a plurality of upper axis phases of the sewing machine, A sewing machine comprising an upper thread consumption detecting means for detecting the upper thread consumption in the upper thread consumption detecting phase detected by the detecting means, and a thread tensioner capable of controlling a pressing force applied to the upper thread. The upper thread required amount calculation means for calculating the upper thread required amount between the needle drops in advance based on the pattern data of the selected sewing pattern and the means for storing the calculation result in the upper thread required amount storage means. Thread necessary amount calculation storage means, and Comparing calculation means for calculating the difference between the consumption amount and the required needle thread amount, and thread tension correction preparation means for reading the corresponding correction data from the correction data storage means based on the calculation result and storing it in the correction data temporary storage means In the next thread tensioner control phase detected by the upper shaft phase detecting means, the pressing force of the thread tensioner is corrected and controlled by the temporarily stored correction data for thread tightening in the next cycle. Automatic thread tension device for sewing machines.
い模様の模様データと、予め準備された標準的な布厚デ
ータとに基づき上糸必要量を演算することを特徴とする
請求項１に記載されたミシンの自動糸調子装置。2. The upper thread necessary amount calculating means calculates the upper thread necessary amount based on the pattern data of the selected sewing pattern and standard cloth thickness data prepared in advance. An automatic thread tension device for a sewing machine according to Item 1.
タが記憶された模様データ記憶手段と、所望の縫い模様
を選択するための模様選択手段と、上下動する針を有し
選択された縫い模様に対する模様データに基づきミシン
の上軸回転に同期して加工布に縫目を形成する縫目形成
機構とを備えたミシンにおいて、ミシンの複数の上軸位
相を検出する上軸位相検出手段と、該検出手段により検
出された上糸消費量検出位相で上糸消費量を検出する上
糸消費量検出手段と、上糸に付与する押圧力を制御可能
な糸調子器とを備えたミシンであって、手動操作により
加工布の厚さに応じて布厚を指定可能なマニュアルスイ
ッチと、選択された縫い模様の模様データ等に基づき予
め各針落間の上糸必要量を演算する上糸必要量演算手段
と演算結果を上糸必要量記憶手段に記憶させる手段とか
らなる上糸必要量演算記憶手段と、前記上糸消費量と前
記上糸必要量との差を演算する比較演算手段と、演算結
果に基づき補正データ記憶手段から該当する補正データ
を読み出し補正データ一時記憶手段に格納する糸調子補
正準備手段とを有し、前記上軸位相検出手段で検出され
る次の糸調子器制御位相で次サイクルの糸締めのために
前記一時記憶された補正データにより糸調子器の前記押
圧力を補正制御することを特徴とするミシンの自動糸調
子装置。3. A pattern data storage means for storing pattern data for a plurality of sewing patterns of a sewing machine, a pattern selecting means for selecting a desired sewing pattern, and a selected sewing pattern having vertically moving needles. In a sewing machine including a stitch forming mechanism that forms a stitch on a work cloth in synchronism with the upper axis rotation of the sewing machine based on the pattern data for the upper axis phase detecting means for detecting a plurality of upper axis phases of the sewing machine, A sewing machine including upper thread consumption detecting means for detecting the upper thread consumption at the upper thread consumption detecting phase detected by the detecting means, and a thread tensioner capable of controlling the pressing force applied to the upper thread. , The manual switch that can specify the cloth thickness according to the thickness of the work cloth by manual operation, and the needle thread required to calculate the needle thread required amount between each needle drop in advance based on the selected sewing pattern data etc. Amount calculation means and calculation result Needle thread required amount calculation storage means including means for storing in the required amount storage means, comparison calculation means for calculating a difference between the upper thread consumption amount and the required upper thread amount, and correction data storage means based on the calculation result. And thread tension correction preparation means for reading out the corresponding correction data from the above and storing it in the correction data temporary storage means for tightening the thread in the next cycle at the next thread tensioner control phase detected by the upper shaft phase detection means. An automatic thread tension device for a sewing machine, which corrects and controls the pressing force of the thread tension device based on the temporarily stored correction data.
操作に応じて、縫い模様の模様データに加え、予め準備
された薄物に対する布厚データまたは厚物に対する布厚
データに基づき上糸必要量を演算することを特徴とする
請求項３に記載されたミシンの自動糸調子装置。4. When the manual switch is operated, the required needle thread amount is calculated based on the cloth thickness data for a thin material or the cloth thickness data for a thick material prepared in advance, in addition to the sewing pattern data in accordance with the operation. The automatic thread tension device for a sewing machine according to claim 3, wherein:
群と装飾を目的とする縫い模様群に分け、前記上糸必要
量演算手段が、前記２種の縫い模様群に対して別の演算
式で上糸必要量を演算することを特徴とする請求項１か
ら請求項４のうちのいずれか１項に記載されたミシンの
自動糸調子装置。5. A sewing pattern is divided into a sewing pattern group for the purpose of sewing strength and a sewing pattern group for the purpose of decoration, and the needle thread required amount calculating means is different for the two types of sewing pattern groups. The automatic thread tension device for a sewing machine according to any one of claims 1 to 4, wherein the required amount of the upper thread is calculated by an arithmetic expression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5640892A JPH05212183A (en) | 1992-02-06 | 1992-02-06 | Automatic tension adjusting device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5640892A JPH05212183A (en) | 1992-02-06 | 1992-02-06 | Automatic tension adjusting device of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05212183A true JPH05212183A (en) | 1993-08-24 |
Family
ID=13026338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5640892A Pending JPH05212183A (en) | 1992-02-06 | 1992-02-06 | Automatic tension adjusting device of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05212183A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08141261A (en) * | 1994-11-18 | 1996-06-04 | Brother Ind Ltd | Needle thread tension adjusting device in sewing machine |
| US7225747B2 (en) | 2004-03-15 | 2007-06-05 | Vsm Group Ab | Control of thread feed for a sewing machine |
| US7308333B2 (en) | 2002-01-31 | 2007-12-11 | Melco Industries, Inc. | Computerized stitching including embroidering |
| KR101524953B1 (en) * | 2010-07-28 | 2015-06-01 | 엔에스디 가부시끼가이샤 | Sewing machine |
| KR20170120136A (en) * | 2015-02-25 | 2017-10-30 | 도카이 고교 미싱 가부시키가이샤 | Quality control of stitching in sewing machines |
| WO2020183714A1 (en) * | 2019-03-14 | 2020-09-17 | エヌエスディ株式会社 | Sewing machine |
| EP3978671A1 (en) * | 2020-09-30 | 2022-04-06 | Ricoh Company, Ltd. | Thread tensioning unit, embroidery apparatus, dyeing apparatus, dyeing embroidery system, thread tensioning method, and carrier medium |
-
1992
- 1992-02-06 JP JP5640892A patent/JPH05212183A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08141261A (en) * | 1994-11-18 | 1996-06-04 | Brother Ind Ltd | Needle thread tension adjusting device in sewing machine |
| US7308333B2 (en) | 2002-01-31 | 2007-12-11 | Melco Industries, Inc. | Computerized stitching including embroidering |
| US7225747B2 (en) | 2004-03-15 | 2007-06-05 | Vsm Group Ab | Control of thread feed for a sewing machine |
| KR101524953B1 (en) * | 2010-07-28 | 2015-06-01 | 엔에스디 가부시끼가이샤 | Sewing machine |
| KR20170120136A (en) * | 2015-02-25 | 2017-10-30 | 도카이 고교 미싱 가부시키가이샤 | Quality control of stitching in sewing machines |
| EP3263756A4 (en) * | 2015-02-25 | 2018-08-08 | Tokai Kogyo Mishin Kabushiki Kaisha | Sewing quality control in sewing machine |
| US10450684B2 (en) | 2015-02-25 | 2019-10-22 | Tokai Kogyo Mishin Kabushiki Kaisha | Sewing quality control in sewing machine |
| WO2020183714A1 (en) * | 2019-03-14 | 2020-09-17 | エヌエスディ株式会社 | Sewing machine |
| JPWO2020183714A1 (en) * | 2019-03-14 | 2021-04-30 | エヌエスディ株式会社 | sewing machine |
| US11781257B2 (en) | 2019-03-14 | 2023-10-10 | Nsd Corporation | Sewing machine |
| EP3978671A1 (en) * | 2020-09-30 | 2022-04-06 | Ricoh Company, Ltd. | Thread tensioning unit, embroidery apparatus, dyeing apparatus, dyeing embroidery system, thread tensioning method, and carrier medium |
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