JPH07303781A - Controller for automatic sewing machine - Google Patents
Controller for automatic sewing machineInfo
- Publication number
- JPH07303781A JPH07303781A JP8612095A JP8612095A JPH07303781A JP H07303781 A JPH07303781 A JP H07303781A JP 8612095 A JP8612095 A JP 8612095A JP 8612095 A JP8612095 A JP 8612095A JP H07303781 A JPH07303781 A JP H07303781A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- bobbin
- needle
- sewing machine
- automatic sewing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、釜に対して新旧のボ
ビンケースを自動的に交換する装置を備えた自動ミシン
において、交換後のボビンの下糸の処理に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to processing of bobbin lower thread after replacement in an automatic sewing machine equipped with a device for automatically replacing old and new bobbin cases with respect to a hook.
【０００２】[0002]
【従来の技術】従来、ミシンの釜に装着されているボビ
ンを交換したときには、下糸が釜から長く垂れ下がって
いるので、その糸端が次の縫製開始時に縫い目中に縫い
込まれたり団子状になる等、見苦しい縫い目となること
があった。そのため、垂直釜を有するミシンにおいて
は、作業者が上糸を保持しながら手で主軸を回転させ、
針を上下することにより、釜の周りに上糸を一回りさ
せ、下糸を引っかけて針板上に引き出している。2. Description of the Related Art Conventionally, when a bobbin attached to a sewing machine hook is replaced, the bobbin thread hangs down from the hook for a long time. There was a case that it became unsightly seam. Therefore, in a sewing machine having a vertical hook, the operator manually rotates the main shaft while holding the upper thread,
By moving the needle up and down, the upper thread makes one turn around the shuttle and the lower thread is hooked and pulled out onto the needle plate.
【０００３】[0003]
【発明が解決しようとする課題】上記したように、釜に
装着されているボビンを自動的に交換する装置をミシン
に設けても、下糸交換後に作業者が上糸引き上げ作業を
行わなければならないので、ボビン交換作業と縫製作業
とを自動的に連続させることができなかった。As described above, even if the sewing machine is provided with a device for automatically replacing the bobbin mounted on the shuttle, the operator must pull up the upper thread after the lower thread is replaced. Therefore, the bobbin exchange work and the sewing work cannot be automatically continued.
【０００４】この発明は、下糸交換後に引き続き縫製作
業を自動的に続行し得るようにすることを目的としてい
る。An object of the present invention is to make it possible to automatically continue the sewing operation after the bobbin thread replacement.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、この発明の自動ミシンの制御装置は、釜と針との協
働により所定数の縫い目を形成する縫いサイクルを完了
した後に自動的に糸切りを行い針上位置に停止する自動
ミシンと、針上位置停止後に針に連なる上糸切断端を保
持する上糸保持手段と、前記釜に対して新旧のボビンケ
ースを交換する下糸交換装置と、釜に装着されたボビン
ケース内の下糸残量を検出する下糸残量検出手段と、該
手段が残量不足を検出して自動ミシンが停止した後下糸
交換装置を作動させる制御手段と、下糸交換完了時にミ
シン主軸を１回転させる一回転制御手段とを備えたもの
である。In order to achieve the above object, the control device of the automatic sewing machine of the present invention automatically operates after the completion of the sewing cycle for forming a predetermined number of stitches by the cooperation of the hook and the needle. An automatic sewing machine that cuts the thread and stops at the needle up position, needle thread holding means that holds the needle thread cutting end that continues to the needle after the needle up position is stopped, and bobbin thread that replaces the old and new bobbin cases with the hook. An exchanging device, a bobbin thread remaining amount detecting means for detecting a bobbin thread remaining amount in a bobbin case attached to a hook, and the bobbin thread exchanging device is operated after the means detects an insufficient remaining amount of the bobbin thread and the automatic sewing machine stops. And a one-rotation control means for rotating the sewing machine spindle once when the bobbin thread replacement is completed.
【０００６】また、この発明の他の自動ミシンの制御装
置は、釜と針との協働によりそれぞれ所定数の縫い目を
形成する複数工程からなる縫いサイクルを完了した後に
針上位置に停止する自動ミシンと、上糸及び下糸を切断
する糸切り手段と、針に連なる上糸切断端を保持する上
糸保持手段と、前記釜に対して新旧のボビンケースを交
換する下糸交換装置と、釜に装着されたボビンケース内
の下糸残量を検出する下糸残量検出手段と、該手段が残
量不足を検出したときに実行中の工程を終了後自動ミシ
ンを針下位置に停止し、操作による糸切り信号により自
動ミシンを針上位置に停止させると共に糸切り手段を作
動して上糸保持手段を作動させ、その後下糸交換装置を
作動させる制御手段と、下糸交換完了時にミシン主軸を
１回転させる一回転制御手段とを備えたものである。Further, another automatic sewing machine controller of the present invention is an automatic sewing machine controller which stops at the needle up position after completing a sewing cycle consisting of a plurality of steps for forming a predetermined number of stitches by cooperation of a shuttle and a needle. A sewing machine, a thread cutting means for cutting the upper thread and the lower thread, an upper thread holding means for holding the upper thread cutting end connected to the needle, and a lower thread exchanging device for exchanging the old and new bobbin cases with respect to the shuttle. A bobbin thread remaining amount detecting means for detecting the bobbin thread remaining amount in the bobbin case mounted on the hook, and the automatic sewing machine is stopped at the needle lower position after the process being executed when the means detects the remaining amount of the bobbin thread. Then, the automatic sewing machine is stopped at the needle up position by the thread cutting signal by the operation, the thread cutting means is operated to operate the upper thread holding means, and then the lower thread exchanging device is operated. One rotation of the sewing machine spindle It is obtained by a control means.
【０００７】上記何れの場合にも、糸切り手段を糸切り
後に釜に連なる下糸端を保持する構成とし、一回転制御
手段による主軸の１回転時に糸切り手段と上糸保持手段
を動作するようにすることができる。In any of the above cases, the thread cutting means is constructed to hold the lower thread end connected to the shuttle after thread cutting, and the thread cutting means and the upper thread holding means are operated when the main shaft makes one rotation by the one rotation control means. You can
【０００８】[0008]
【作用】上記のように構成されたミシンの下糸繰り出し
装置においては、縫いサイクルが完了すると、自動的に
糸切りが行われて釜に連なる下糸端が糸切り手段に保持
されると共に、針上位置に停止し、針に連なる上糸の切
断端が上糸保持手段に保持される。また、釜に装着され
たボビンケース内の下糸残量が不足していることを下糸
残量検出手段が検出すると、自動ミシンが停止し、下糸
交換装置により釜に対して新旧のボビンケースが交換さ
れる。そのときに、ミシン主軸が１回転すると共に、糸
切り手段及び上糸保持手段が作動し、下糸が布載置面上
に引き上げられる。In the bobbin thread feeding device of the sewing machine configured as described above, when the sewing cycle is completed, thread cutting is automatically performed and the bobbin thread end connected to the hook is held by the thread cutting means. The needle thread is stopped at the needle up position, and the cut end of the needle thread continuing to the needle is held by the needle thread holding means. When the bobbin thread remaining amount detecting means detects that the bobbin case remaining in the bobbin case installed in the hook is insufficient, the automatic sewing machine stops and the bobbin thread changing device causes the bobbin of the old and new bobbins to move. The case is replaced. At that time, the main shaft of the sewing machine makes one rotation, and the thread cutting means and the upper thread holding means operate to pull up the lower thread on the cloth placing surface.
【０００９】複数工程からなる縫いサイクルを行う自動
ミシンにおいては、釜に装着されたボビンケース内の下
糸残量が不足していることを下糸残量検出手段が検出す
ると、実行中の工程を終了後に針下位置に停止する。そ
して、操作によって針上位置に停止すると共に糸切りが
行われ、針糸が上糸保持手段に保持された後、下糸交換
が行われ。以後上記と同様の動作が行われる。In an automatic sewing machine which performs a sewing cycle consisting of a plurality of steps, when the lower thread remaining amount detecting means detects that the lower thread remaining amount in the bobbin case mounted on the hook is insufficient, the step being executed. After finishing, stop at the needle down position. Then, the needle thread is stopped at the needle upper position by the operation, thread cutting is performed, and after the needle thread is held by the upper thread holding means, the lower thread is replaced. After that, the same operation as described above is performed.
【００１０】[0010]
【実施例】図１ないし図７を参照し、この発明の自動ミ
シンの制御装置の実施例について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a control device for an automatic sewing machine according to the present invention will be described with reference to FIGS.
【００１１】この制御装置は、図１に示す自動ミシンに
おけるものである。This control device is used in the automatic sewing machine shown in FIG.
【００１２】この自動ミシンの垂直釜１にはボビンケー
ス２が着脱可能に装着されており、そのボビンケース２
内のボビン（不図示）には下糸３が巻装されている。ま
た、この垂直釜１に近接してセンサー４が配置されてい
る。このセンサー４は、ボビンケース２内の下糸残量を
光学的に検出する周知の構成であり、従って、下糸残量
検知手段の機能を有している。また、このセンサー４の
出力は釜内のボビンケース２（ボビン）の装着の有無を
検出するボビンケース装着検知手段の機能も有してい
る。A bobbin case 2 is detachably attached to a vertical shuttle 1 of this automatic sewing machine.
The lower thread 3 is wound around the inner bobbin (not shown). Further, a sensor 4 is arranged close to the vertical shuttle 1. The sensor 4 has a well-known configuration for optically detecting the remaining amount of the lower thread in the bobbin case 2, and therefore has a function of a lower thread remaining amount detecting means. Further, the output of the sensor 4 also has a function of a bobbin case attachment detecting means for detecting whether or not the bobbin case 2 (bobbin) in the shuttle is attached.
【００１３】ミシン頭部５には、ベルト７を介して主軸
６がサーボモーター８に連結され、針９の上下死点をそ
れぞれ検出する針位置検出手段１０が設けられている。
また、針９に近接した位置には、後述する糸切り手段に
よる糸切り後に針９と布との間に連なる針糸（上糸）１
１を払った後に保持する上糸保持手段１２が設けられて
いる。この上糸保持手段として、例えば、特開昭５９−
７１７７３号公報等により周知のものを採用することが
できる。また、布載置面（針板）１６の下方には、布載
置面１６と釜１との間で、針９が下位置から上位置に移
動するミシン主軸６の半回転に連動して移動し、布に連
なる上下糸３、１１を捕捉し、固定刃と協働して切断す
る周知の（糸切り手段）糸切断機構１３が配置されてい
る。この糸切り手段１３には、糸切り後に釜に連なる下
糸端を保持する下糸端保持部が設けられている。A main shaft 6 is connected to a servomotor 8 via a belt 7 on the sewing machine head 5, and needle position detecting means 10 for detecting the upper and lower dead points of a needle 9 are provided.
Further, at a position close to the needle 9, a needle thread (upper thread) 1 connected between the needle 9 and the cloth after thread cutting by a thread cutting means described later.
An upper thread holding means 12 for holding after paying 1 is provided. As the needle thread holding means, for example, JP-A-59-59
Well-known ones such as those disclosed in Japanese Patent No. 71773 can be adopted. Further, below the cloth placing surface (needle plate) 16, between the cloth placing surface 16 and the shuttle 1, the needle 9 is interlocked with a half rotation of the sewing machine main shaft 6 which moves from the lower position to the upper position. A well-known (thread cutting means) thread cutting mechanism 13 for moving and catching the upper and lower threads 3 and 11 continuous with the cloth and cutting in cooperation with the fixed blade is arranged. The thread cutting means 13 is provided with a lower thread end holding portion that holds the lower thread end connected to the shuttle after thread cutting.
【００１４】この自動ミシンは、予め設定されたプログ
ラムにより、起動後、それぞれ所定数の縫い目を形成す
る複数工程からなる縫いサイクルを実行する（もちろん
単工程を実行することもできる）もので、各縫い工程終
了時に針下位置に自動的に停止し、全ての工程を終了し
たときに、自動的に糸切りを行った後に針上位置に停止
するように制御される。This automatic sewing machine executes a sewing cycle consisting of a plurality of steps, each of which forms a predetermined number of stitches, after starting by a preset program (of course, it is also possible to execute a single step). It is controlled to automatically stop at the needle lower position at the end of the sewing process and automatically stop at the needle upper position after thread trimming when all the processes are completed.
【００１５】図２に示す下糸交換装置は、釜１前方に対
向配置されたボビン交換部Ｉと、釜１下方に配置された
下糸巻回部IIと、それに近接配置された下糸切断部III
とより構成され、例えば、特開平５−１９２４７６号公
報に詳細に記載されている構成を採用することができ
る。The bobbin thread exchanging device shown in FIG. 2 has a bobbin exchanging section I arranged in front of the shuttle 1 and a bobbin winding section II arranged under the shuttle 1 and a bobbin thread cutting section arranged in proximity to the bobbin winding section II. III
The configuration described in detail in Japanese Patent Laid-Open No. 5-192476 can be adopted.
【００１６】ボビン交換部Ｉは、ボビンケース２を吸着
する電磁石を有し、その電磁石によって釜１又は下糸巻
回部IIのボビン保持部１９に対してボビンケース２を着
脱し、保持するための一対の着脱部１４、１４と、着脱
部１４、１４を釜１に対向する位置と下糸巻回部IIに対
向する位置とに回転可能とし、且つ、着脱部１４、１４
を釜１及びボビン保持部１９に対して水平方向に進退可
能とする支持部材１５と、支持部材１５を回転させる回
転機構１７と、支持部材１５を進退させる不図示の移動
機構とにより構成されている。The bobbin exchanging section I has an electromagnet for attracting the bobbin case 2, and is used for attaching and detaching the bobbin case 2 to and from the bobbin holding section 19 of the shuttle 1 or the bobbin winding section II by the electromagnet. A pair of attachment / detachment portions 14, 14 that can rotate the attachment / detachment portions 14, 14 between a position facing the shuttle 1 and a position opposing the bobbin winding portion II, and the attachment / detachment parts 14, 14
It is composed of a support member 15 that can move back and forth in a horizontal direction with respect to the shuttle 1 and the bobbin holding portion 19, a rotation mechanism 17 that rotates the support member 15, and a moving mechanism (not shown) that moves the support member 15 back and forth. There is.
【００１７】下糸巻回部IIにおいては、ボビン交換部Ｉ
の着脱部１４からボビン保持部１９に移されたボビンケ
ース２に、モーター１８の回転によって、糸Ｓが糸巻Ｂ
から引き出されつつ所定量巻付けられる。In the bobbin winding section II, the bobbin changing section I
On the bobbin case 2 transferred from the attaching / detaching part 14 of the bobbin to the bobbin holding part 19, the yarn S is wound by the rotation of the motor 18.
A predetermined amount is wound while being pulled out from.
【００１８】下糸切断部III においては、ソレノイド２
０の作用によって移動する不図示のメスにより、ボビン
保持部１９に保持されたボビンケースと糸巻Ｂとの間の
糸Ｓが、ボビンケースから所定長の糸端となるように切
断される。In the lower thread cutting section III, the solenoid 2
The thread S between the bobbin case held by the bobbin holding section 19 and the bobbin winding B is cut from the bobbin case by a knife (not shown) which moves by the action of 0 so that the bobbin case becomes a thread end of a predetermined length.
【００１９】このように構成された下糸交換装置におい
ては、次のような一連の動作が行われる。In the bobbin thread exchanging device thus constructed, the following series of operations are performed.
【００２０】即ち、支持部材１５が前記不図示の移動機
構により前進して着脱部１４、１４が釜１及び下糸巻回
部IIのボビン保持部１９のボビンケース２、２を保持
し、支持部材１５が後退した後に、支持部材１５が回転
機構１７により回転し、それぞれのボビンケースが反対
位置の下糸巻回部IIと釜１に対向する。その後、支持部
材１５が移動機構により前進して着脱部１４、１４に保
持しているボビンケース２、２を釜１及びボビン保持部
１９にそれぞれ装着する。That is, the supporting member 15 is moved forward by the moving mechanism (not shown), and the attaching / detaching portions 14 and 14 hold the bobbin cases 2 and 2 of the bobbin holding portion 19 of the shuttle 1 and the bobbin winding portion II. After 15 is retracted, the support member 15 is rotated by the rotating mechanism 17, and the respective bobbin cases face the bobbin thread winding portion II and the hook 1 at the opposite positions. After that, the support member 15 is moved forward by the moving mechanism and the bobbin cases 2 and 2 held by the attaching / detaching portions 14 and 14 are mounted on the shuttle 1 and the bobbin holding portion 19, respectively.
【００２１】また、下糸巻回部IIにおいては、糸巻Ｂよ
り引き出される糸Ｓがボビン保持部１９のボビンケース
２に巻付けられる。そして、所定糸量の巻付けが終了す
ると、下糸切断部III によって糸端を所定長残して切断
される。In the lower thread winding section II, the thread S drawn from the thread winding B is wound around the bobbin case 2 of the bobbin holding section 19. When the winding of the predetermined amount of yarn is completed, the lower yarn cutting section III cuts the yarn with a predetermined length left.
【００２２】次に、図３及び図４を参照し、縫いサイク
ル終了に伴う糸切り後の下糸交換について説明する。Next, with reference to FIGS. 3 and 4, the bobbin thread replacement after thread cutting at the end of the sewing cycle will be described.
【００２３】縫いサイクル制御回路は、前述の縫いサイ
クルを行うように自動ミシンを制御する。サイクル状態
判別回路が縫いサイクルの終了を判断すると、針位置検
知回路（針位置検知手段１０）からの下位置信号によっ
て定位置停止制御回路がミシンを針下位置に停止するよ
う、モーター制御回路に信号を発する。下位置停止後に
糸切り制御回路が作動し、定位置停止制御回路に信号を
送って針上位置までモーターを駆動すると共に糸切り機
構１３を作動し、針糸１１及び下糸３とを切断して自動
ミシンを針上位置に停止する。上位置停止後クランプ制
御回路が動作して上糸保持手段１２が針９と布との間に
連なってる針糸１１をクランプする。The sewing cycle control circuit controls the automatic sewing machine to perform the above-mentioned sewing cycle. When the cycle state determination circuit determines the end of the sewing cycle, the motor position control circuit instructs the fixed position stop control circuit to stop the sewing machine at the needle down position by the lower position signal from the needle position detection circuit (needle position detection means 10). Emit a signal. After the lower position is stopped, the thread trimming control circuit operates to send a signal to the fixed position stop control circuit to drive the motor to the needle up position and activate the thread trimming mechanism 13 to disconnect the needle thread 11 and the bobbin thread 3. Stop the automatic sewing machine at the needle up position. After the upper position is stopped, the clamp control circuit operates and the upper thread holding means 12 clamps the needle thread 11 connected between the needle 9 and the cloth.
【００２４】そして、残量判断回路が残量検知手段（セ
ンサー４）の検知信号により残量不足を検知すると、モ
ーターロック回路によりサーボモーター８の回転を禁止
する。その後、下糸交換制御回路の作用により下糸交換
装置が交換動作を行う。When the remaining amount judgment circuit detects the remaining amount shortage by the detection signal of the remaining amount detecting means (sensor 4), the rotation of the servomotor 8 is prohibited by the motor lock circuit. Then, the bobbin thread exchanging device performs the exchanging operation by the action of the bobbin thread exchanging control circuit.
【００２５】センサー４からの出力によってボビンケー
ス２の釜１への装着が検知されると、交換終了判別回路
により交換動作終了と判別され、モーターロック回路が
禁止を解除すると共に、一回転制御回路に信号を発し、
ミシン主軸が１回転して針上位置に停止する。このと
き、針９は布のない状態で上下動するので、上糸保持手
段１２に保持されている針糸１１は抜け落ちず、釜１の
周りを回って釜１に装着されているボビンケース２の下
糸３を布載置面上に引き上げる。When the mounting of the bobbin case 2 on the shuttle 1 is detected by the output from the sensor 4, the replacement end determination circuit determines that the replacement operation has been completed, and the motor lock circuit releases the prohibition and the one-rotation control circuit. Signal to
The main shaft of the sewing machine makes one rotation and stops at the needle up position. At this time, since the needle 9 moves up and down without the cloth, the needle thread 11 held by the needle thread holding means 12 does not fall out, and rotates around the shuttle 1 and is attached to the shuttle 1 of the bobbin case 2. Pull up the lower thread 3 on the cloth placing surface.
【００２６】次に、図５及び図６を参照し、縫いサイク
ル途中の糸切れ（残糸量不足）検出に伴う下糸交換につ
いて説明する。Next, with reference to FIGS. 5 and 6, the bobbin thread replacement due to the detection of thread breakage (insufficient remaining thread amount) during the sewing cycle will be described.
【００２７】前述の縫いサイクル制御回路により自動ミ
シンがサイクル中のある工程を実施しているときに、残
量判断回路が残量検知手段（センサー４）の検知信号に
より残量不足と判断すると、その工程を終了したときに
下位置信号により定位置停止制御回路が針下位置にミシ
ンを停止させる。そして、不図示のペダルあるいは操作
スイッチを操作することにより糸切りスイッチ（糸切り
ＳＷ）から糸切り信号が発せられると、糸切り制御回路
が作用し、自動ミシンが針上位置に回転停止するまでの
間に、糸切り機構１３が動作する。While the automatic sewing machine is performing a certain process during the cycle by the above-mentioned sewing cycle control circuit, if the remaining amount judging circuit judges that the remaining amount is insufficient by the detection signal of the remaining amount detecting means (sensor 4), When the process is completed, the fixed position stop control circuit stops the sewing machine at the needle lower position by the lower position signal. When a thread cutting signal (thread cutting SW) is issued by operating a pedal or an operation switch (not shown), the thread cutting control circuit operates until the automatic sewing machine stops rotating to the needle up position. During this period, the thread cutting mechanism 13 operates.
【００２８】その後、クランプ制御回路が作用して上糸
保持手段１２が針と布との間に連なる針糸１１を保持す
る。その後、モーターロック回路が作用してサーボモー
ター８の回転を禁止してから、下糸交換制御回路の作用
により下糸交換装置が交換動作を行う。ボビンケースの
交換が終了すると、ミシン主軸６を１回転して上停止
し、下糸３が布載置面１６上に引き上げられる。After that, the clamp control circuit operates and the upper thread holding means 12 holds the needle thread 11 which is continuous between the needle and the cloth. After that, the motor lock circuit operates to prohibit the rotation of the servomotor 8, and then the bobbin thread exchanging control circuit causes the bobbin thread exchanging device to perform an exchanging operation. When the replacement of the bobbin case is completed, the sewing machine main shaft 6 is rotated once to stop and the lower thread 3 is pulled up onto the cloth placing surface 16.
【００２９】以上、垂直釜を有する自動ミシンに適用す
る実施例を説明したが、他のミシン、例えば、針振り機
構を有するミシンに適用することもでき、その場合は、
糸切り装置を、上記のものに代え、上下糸の切断後に釜
側に連なる下糸端を糸切り装置のクランプ部で保持す
る、特開昭５６−１０６６９２号公報に記載されたもの
を採用するとよい。Although the embodiment applied to the automatic sewing machine having the vertical shuttle has been described above, it can be applied to other sewing machines, for example, those having a needle swinging mechanism. In that case,
If the thread trimming device is replaced by the one described in Japanese Patent Laid-Open No. 56-106692, in which the lower thread end connected to the shuttle after the upper and lower threads are cut is held by the clamp part of the thread trimming device, Good.
【００３０】このようなミシンにおいては、図４及び図
６に示す下糸交換後の処理が、図７に示すように行われ
る。即ち、下糸交換が終了すると、モーターロック回路
が禁止を解除し、一回転制御回路が作用すると共に糸切
り制御回路が作用し、糸切りが終了後に針上位置に停止
する。このとき、釜に連なる下糸端は糸切り機構の下糸
端保持部に保持されている。その後、クランプ制御回路
により上糸保持手段１２が動作して針糸１１の糸端を保
持する。In such a sewing machine, the processing after the bobbin thread replacement shown in FIGS. 4 and 6 is performed as shown in FIG. That is, when the bobbin thread replacement is completed, the motor lock circuit releases the prohibition, the one-rotation control circuit operates and the thread trimming control circuit operates, and after the thread trimming is completed, it stops at the needle upper position. At this time, the lower thread end connected to the shuttle is held by the lower thread end holding portion of the thread cutting mechanism. After that, the upper thread holding means 12 is operated by the clamp control circuit to hold the thread end of the needle thread 11.
【００３１】また、前述の下糸交換装置におけるボビン
交換部Ｉの後退位置と下糸巻回部IIとの間、あるいは下
糸巻回部IIと同位置に、釜から抜き出したボビンケース
の残糸を除去する残糸除去部を設けてもよい。Further, the residual thread of the bobbin case extracted from the shuttle is placed between the retracted position of the bobbin exchanging section I and the bobbin thread winding section II in the above bobbin thread exchanging device or at the same position as the bobbin thread winding section II. A residual thread removing unit for removing may be provided.
【００３２】[0032]
【発明の効果】この発明は、以上説明したように構成さ
れているので、以下に記載するような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００３３】即ち、下糸交換時にミシン主軸が１回転し
て下糸を布載置面上に自動的に引き上げるので、下糸端
を縫製開始時に縫い目中に縫い込んだりすることがなく
なると共に、下糸交換作業と縫製作業とを自動的に連続
させることが可能となり、稼働率が向上し、経済的であ
る。また、糸切り手段に下糸端保持部を設ける場合に
は、下糸保持のための煩わしい準備作業が不要となり、
下糸の保持も簡単、且つ、確実になる。そればかりか、
縫い始めから糸抜けもなく、上糸によって下糸が生地上
へ引き上げられることもなく、糸締まりの良い縫い目を
形成することができ、下糸の残り長さを必要最低限とす
ることができる。That is, when the bobbin thread is replaced, the main shaft of the sewing machine makes one revolution and the bobbin thread is automatically pulled up onto the cloth placing surface, so that the bobbin thread end is not sewn into the stitch at the start of sewing and The bobbin thread exchanging work and the sewing work can be automatically continued, the operating rate is improved, and it is economical. Further, when the lower thread end holding portion is provided in the thread cutting means, a troublesome preparation work for holding the lower thread is unnecessary,
The bobbin thread can be held easily and reliably. Not only that,
The thread does not come off from the start of sewing, the bobbin thread is not pulled up onto the fabric by the upper thread, and a seam with good thread tightness can be formed, and the remaining length of the bobbin thread can be minimized. .
【図１】この発明の制御装置の対象となる自動ミシンの
概略正面図である。FIG. 1 is a schematic front view of an automatic sewing machine which is a target of a control device of the present invention.
【図２】下糸供給装置の概略正面図である。FIG. 2 is a schematic front view of a lower thread supply device.
【図３】縫いサイクル終了に伴う糸切り後の下糸交換に
関する回路構成を示すブロック図である。FIG. 3 is a block diagram showing a circuit configuration relating to bobbin thread replacement after thread trimming at the end of a sewing cycle.
【図４】縫いサイクル終了に伴う糸切り後の下糸交換の
フローチャートである。FIG. 4 is a flowchart of bobbin thread replacement after thread trimming at the end of a sewing cycle.
【図５】縫いサイクル途中の糸切れ（残糸量不足）検知
に伴う下糸交換に関する回路構成を示すブロック図であ
る。FIG. 5 is a block diagram showing a circuit configuration relating to bobbin thread replacement due to detection of thread breakage (insufficient remaining thread amount) during a sewing cycle.
【図６】縫いサイクル途中の糸切れ（残糸量不足）検知
に伴う下糸交換のフローチャートである。FIG. 6 is a flowchart of bobbin thread replacement due to detection of thread breakage (insufficient remaining thread amount) during a sewing cycle.
【図７】下糸交換後の処理のフローチャートである。FIG. 7 is a flowchart of a process after replacing the lower thread.
１ 釜 ２ ボビンケース ３ 下糸 ４ 残量検知手段（センサー） ５ ミシン頭部 ９ 針 １０ 針位置検出手段 １１ 上糸（針糸） １２ 上糸保持手段 １３ 糸切り手段 １６ 布載置面（針板） 1 hook 2 bobbin case 3 bobbin thread 4 remaining amount detecting means (sensor) 5 sewing machine head 9 needles 10 needle position detecting means 11 needle thread (needle thread) 12 needle thread holding means 13 thread cutting means 16 cloth placement surface (needle) Board)
Claims (3)
成する縫いサイクルを完了した後に自動的に糸切りを行
い針上位置に停止する自動ミシンと、針上位置停止後に
針に連なる上糸切断端を保持する上糸保持手段と、前記
釜に対して新旧のボビンケースを交換する下糸交換装置
と、釜に装着されたボビンケース内の下糸残量を検出す
る下糸残量検出手段と、該手段が残量不足を検出して自
動ミシンが停止した後下糸交換装置を作動させる制御手
段と、下糸交換完了時にミシン主軸を１回転させる一回
転制御手段とを備えた自動ミシンの制御装置。1. An automatic sewing machine for automatically thread-cutting and stopping at a needle up position after completing a sewing cycle for forming a predetermined number of stitches by cooperation of a hook and a needle, and a needle after the needle up position is stopped. Upper thread holding means for holding a continuous upper thread cutting end, a lower thread exchanging device for exchanging the old and new bobbin cases with respect to the shuttle, and a lower thread for detecting the remaining amount of the lower thread in the bobbin case attached to the shuttle. A remaining amount detecting means, a control means for activating the lower thread changing device after the automatic sewing machine stops when the remaining amount is detected by the means, and a one-rotation control means for rotating the sewing machine spindle once when the lower thread is completely replaced. Automatic sewing machine control device equipped.
い目を形成する複数工程からなる縫いサイクルを完了し
た後に針上位置に停止する自動ミシンと、上糸及び下糸
を切断する糸切り手段と、針に連なる上糸切断端を保持
する上糸保持手段と、前記釜に対して新旧のボビンケー
スを交換する下糸交換装置と、釜に装着されたボビンケ
ース内の下糸残量を検出する下糸残量検出手段と、該手
段が残量不足を検出したときに実行中の工程を終了後自
動ミシンを針下位置に停止し、操作による糸切り信号に
より自動ミシンを針上位置に停止させると共に糸切り手
段を作動して上糸保持手段を作動させ、その後下糸交換
装置を作動させる制御手段と、下糸交換完了時にミシン
主軸を１回転させる一回転制御手段とを備えた自動ミシ
ンの制御装置。2. An automatic sewing machine that stops at a needle upper position after completing a sewing cycle that forms a predetermined number of stitches by cooperation of a hook and a needle, and a thread that cuts an upper thread and a lower thread. Cutting means, needle thread holding means for holding the needle thread cutting end connected to the needle, bobbin thread exchanging device for replacing the old and new bobbin cases with respect to the hook, and bobbin thread remaining in the bobbin case mounted in the hook. The bobbin thread remaining amount detecting means for detecting the amount, and the automatic sewing machine is stopped at the needle lower position after the process being executed when the means detects an insufficient remaining amount, and the automatic sewing machine is operated by the thread trimming signal by the operation. Control means for stopping at the upper position and activating the thread cutting means to activate the upper thread holding means, and then activating the lower thread exchanging device, and one rotation control means for rotating the sewing machine spindle once when the lower thread exchange is completed. Automatic sewing machine control device equipped.
を保持する構成であり、一回転制御手段による主軸の１
回転時に糸切り手段と上糸保持手段が動作する請求項１
又は請求項２に記載の自動ミシンの制御装置。3. The thread trimming means holds the lower thread end connected to the shuttle after thread trimming, and the one-rotation control means controls one of the main shafts.
2. The thread cutting means and the upper thread holding means operate during rotation.
Alternatively, the control device for the automatic sewing machine according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8612095A JPH07303781A (en) | 1994-03-18 | 1995-03-18 | Controller for automatic sewing machine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7427094 | 1994-03-18 | ||
| JP6-74270 | 1994-03-18 | ||
| JP8612095A JPH07303781A (en) | 1994-03-18 | 1995-03-18 | Controller for automatic sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07303781A true JPH07303781A (en) | 1995-11-21 |
Family
ID=26415415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8612095A Pending JPH07303781A (en) | 1994-03-18 | 1995-03-18 | Controller for automatic sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07303781A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002113276A (en) * | 2000-10-06 | 2002-04-16 | Juki Corp | Sewing machine |
| CN104372538A (en) * | 2014-10-22 | 2015-02-25 | 拓卡奔马机电科技有限公司 | Bottom wire detection control system and method based on optical fiber sensor and applied to industrial sewing machine |
| CN104372539A (en) * | 2014-10-22 | 2015-02-25 | 拓卡奔马机电科技有限公司 | Bottom line detection correlation type photoelectric control system for sewing machine and control method |
| CN104562469A (en) * | 2015-02-06 | 2015-04-29 | 杰克缝纫机股份有限公司 | Shuttle changing control system and method used for sewing device |
| CN104674471A (en) * | 2015-03-25 | 2015-06-03 | 杰克缝纫机股份有限公司 | Automatic shuttle changing device applied to sewing operation |
| CN104750084A (en) * | 2015-04-22 | 2015-07-01 | 杰克缝纫机股份有限公司 | Distributed intelligent control system for automatically changing bobbins |
| KR102070749B1 (en) * | 2019-09-04 | 2020-01-29 | (주)썬테크 | Sewing machine and bobbin feeder |
-
1995
- 1995-03-18 JP JP8612095A patent/JPH07303781A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002113276A (en) * | 2000-10-06 | 2002-04-16 | Juki Corp | Sewing machine |
| CN104372538A (en) * | 2014-10-22 | 2015-02-25 | 拓卡奔马机电科技有限公司 | Bottom wire detection control system and method based on optical fiber sensor and applied to industrial sewing machine |
| CN104372539A (en) * | 2014-10-22 | 2015-02-25 | 拓卡奔马机电科技有限公司 | Bottom line detection correlation type photoelectric control system for sewing machine and control method |
| CN104562469A (en) * | 2015-02-06 | 2015-04-29 | 杰克缝纫机股份有限公司 | Shuttle changing control system and method used for sewing device |
| CN104674471A (en) * | 2015-03-25 | 2015-06-03 | 杰克缝纫机股份有限公司 | Automatic shuttle changing device applied to sewing operation |
| CN104750084A (en) * | 2015-04-22 | 2015-07-01 | 杰克缝纫机股份有限公司 | Distributed intelligent control system for automatically changing bobbins |
| KR102070749B1 (en) * | 2019-09-04 | 2020-01-29 | (주)썬테크 | Sewing machine and bobbin feeder |
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