JPS5939156B2 - Sewing machine control device - Google Patents
Sewing machine control deviceInfo
- Publication number
- JPS5939156B2 JPS5939156B2 JP7415775A JP7415775A JPS5939156B2 JP S5939156 B2 JPS5939156 B2 JP S5939156B2 JP 7415775 A JP7415775 A JP 7415775A JP 7415775 A JP7415775 A JP 7415775A JP S5939156 B2 JPS5939156 B2 JP S5939156B2
- Authority
- JP
- Japan
- Prior art keywords
- sewing machine
- needle
- becomes
- speed
- signal
- 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.)
- Expired
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- Sewing Machines And Sewing (AREA)
Description
【発明の詳細な説明】
この発明はペダルの前踏み操作によりミシンを高速駆動
している状態から、ペダルを解放または後踏み操作する
ことに関連して１次第に減速するミシン主軸の回転速度
の所定低速度を検知した後に、ミシン停止信号または糸
切り信号等の信号を発生してミシンを制御するミシンの
制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION This invention provides a predetermined rotational speed of the main shaft of a sewing machine which is gradually decelerated in relation to releasing or rearwardly depressing the pedal from a state in which the sewing machine is driven at high speed by forwardly depressing the pedal. The present invention relates to a sewing machine control device that controls the sewing machine by generating a signal such as a sewing machine stop signal or a thread trimming signal after detecting a low speed.
従来においては、上記主軸の所定回転速度検出するのに
、針を停止する上位置また下位置の位置信号のパルス巾
を測定して検出していたが、これには次のような欠点が
あった。Conventionally, the predetermined rotational speed of the spindle was detected by measuring the pulse width of the position signal for the upper or lower position at which the needle stops, but this method has the following drawbacks. Ta.
即ちミシンを高速１駆動状態からペダルを後踏み操作す
るのに関連して、ミシンを所定の低速度まで次第に減速
し、針が下位置から上位置に上昇する間に糸切装置を作
動し針上位置に停止するミシンにおいては、第２図右端
に示すように、下位置信号検出時（Ｘ点）から糸切装置
が糸切りを完了する時（Ｙ点）までには、速度検知時間
△ｔ３（Ｘ−Ｚ間）と糸切装置を作動する電磁装置等の
作動時間△ｔ４（Ｚ−Ｙ間）とを加えた時間△ｔ５を必
要とし、また、糸切り信号は速度検知信号及び下位置信
号の発生に関連して発生するのであり、速度検知信号は
下位置信号のパルス巾の所定の長さを検知して発生する
のであるから、糸切りをするときの主軸は速度検知信号
が発生するパルスが６１３以上の閣下位置検知区間に位
置するような低速回転にする必要がある。In other words, in conjunction with depressing the pedal from the high speed 1 drive state, the sewing machine is gradually decelerated to a predetermined low speed, and while the needle is rising from the lower position to the upper position, the thread trimming device is activated to remove the needle. In a sewing machine that stops at the upper position, as shown on the right side of Figure 2, the speed detection time △ from the time the lower position signal is detected (point X) until the time when the thread trimming device completes thread trimming (point Y) A time △t5 is required, which is the sum of t3 (between X and Z) and the operating time △t4 (between Z and Y) of the electromagnetic device that operates the thread trimming device, and the thread trimming signal requires a speed detection signal and a lower The speed detection signal is generated in conjunction with the generation of the position signal, and the speed detection signal is generated by detecting a predetermined pulse width of the lower position signal. It is necessary to rotate at a low speed so that the generated pulses are located in the position detection section of 613 or more.
従ってミシンを極めて低速にしなければならず、作業能
率が著しく低下すると共に、作業者のペダル後踏み操作
時間が長くなって負担が大きくなり、疲労を増加する等
の欠点があった。Therefore, the sewing machine has to be run at an extremely low speed, resulting in a significant drop in work efficiency and the disadvantages of increasing the burden on the worker by prolonging the amount of time it takes to depress the pedal, resulting in increased fatigue.
またミシンを主モーターに連動した状態からペダルを解
放または後踏み操作するのに関連して、ミシンを補助モ
ーターに連動して補助モータ−７駆動速度まで次第に減
速し、針の下位置信号または上位置信号発生時に補助モ
ーターブレーキを作動させて、ミシンの主軸を針位置検
知区間内に停止するミシンにおいては次のような欠点が
あった。In addition, when the sewing machine is linked to the main motor and the pedal is released or rear-depressed, the sewing machine is linked to the auxiliary motor and gradually decelerates to the auxiliary motor 7 drive speed, and the needle lower position signal or upper Sewing machines that operate an auxiliary motor brake when a position signal is generated to stop the main shaft of the sewing machine within a needle position detection area have the following drawbacks.
即ち補助モーターブレーキの制動力は通常一定であるに
も関らず、高速回転しているミシンを停止するとき、そ
の主軸は高速回転から次第に減速してミシン主軸の回転
慣性力も回転速度の二乗に比例して除々に減少する。In other words, although the braking force of the auxiliary motor brake is normally constant, when a sewing machine that is rotating at high speed is stopped, the main shaft gradually decelerates from high speed rotation, and the rotational inertia of the sewing machine main shaft also becomes the square of the rotation speed. It gradually decreases proportionately.
このため第３図に示すミシン主軸のＷｘ点でミシン停止
のためのブレーキ信号が発生した時、ミシン主軸の回転
慣性力が比較的大きい場合にはＷｙに近い角度位置で停
止し、回転慣性力がそれよりも小さい場合にはＷｘに近
い角度位置で停止し、ミシン停止時における針の上下方
向の高さにばらつきが生じる。Therefore, when a brake signal to stop the sewing machine is generated at point Wx of the sewing machine main shaft as shown in Fig. 3, if the rotational inertia of the sewing machine main shaft is relatively large, the sewing machine will stop at an angular position close to Wy, and the rotational inertia will If is smaller than that, the sewing machine stops at an angular position close to Wx, and the height of the needle in the vertical direction when the sewing machine stops varies.
これにより、例えば、針を下位置に停止して針を中心に
布を回して角縫いを行なう場合、針糸ループを釜剣先が
捕捉した後の角度位置に主軸を停止する必要があるにも
関らず、針糸ループを釜剣先が捕捉する以前の角度位置
で主軸が停止すると、布を回した時に針糸ループが布に
よりねじられて、次にミシンを駆動した時、その角の部
分の針糸ループを釜剣先が捕捉できず目飛びを生じ、正
確な角縫目が形成できない等の欠点が生じ、或いは、針
上位置に停止してからワイパー等を作動する時に、針が
下降しすぎて針先とワイパーが交叉して破損する等の欠
点があった。As a result, for example, when sewing corners by stopping the needle in the down position and rotating the fabric around the needle, it is no longer necessary to stop the spindle at the angular position after the needle thread loop has been captured by the hook tip. Regardless, if the main shaft stops at the angular position before the needle thread loop is captured by the hook tip, the needle thread loop will be twisted by the fabric when the fabric is turned, and the next time the sewing machine is driven, the corner part The needle thread loop cannot be captured by the hook tip, resulting in skipped stitches and the inability to form accurate corner stitches.Also, when the needle is stopped at the top position and the wiper etc. is activated, the needle descends. There were drawbacks such as the stylus tip and wiper crossing over and causing damage.
この発明は、上記欠点を除去することを目的とする。This invention aims to eliminate the above-mentioned drawbacks.
この発明の実施例を図面によって説明すると、ＬＳＷは
ペダルの前踏み操作により開路してオンとなる常開スイ
ッチにして、開路時にトランジスタＴｒ□を導通して出
力を「論理上ＯＪ（以後「論理上」を省略し単に０，１
とする）となる。An embodiment of the present invention will be described with reference to the drawings. LSW is a normally open switch that opens and turns on when the front pedal is pressed, and when the circuit opens, transistor Tr□ conducts and the output is "logically OJ" (hereinafter referred to as "logically"). omit "upper" and simply write 0, 1
).
ＴＳＷはペダルの後踏み操作により閉路してオンとなる
常開スイッチであり、閉路時に出力Ｏとなって糸切り準
備信号となる。TSW is a normally open switch that is turned on by closing the circuit when the pedal is subsequently depressed, and when the circuit is closed, the output becomes O and becomes a thread trimming preparation signal.
ＦＦは記憶機能を備えた公知のフリップフロップ回路で
ある。FF is a known flip-flop circuit with a memory function.
回路１はその出力をＦＦ１のセット入力とし、各ＦＦの
初期動作を安定させる回路であり、電源スィッチ（図示
せず）オン時にミシン駆動モーターより変圧器を介して
整流し平滑したプラス電流を入力し、ツェナーダイオー
ドＺＤがツェナー電圧に達するまでトランジスタＴ、２
を導通して回路１の出力を０とし、ツェナーダイオード
ＺＤがツェナー電圧に達して導通した時にトランジスタ
Ｔｒ３が導通し、Ｔ、が不導通となって回路１の出力を
１にする。Circuit 1 uses its output as the set input for FF1, and is a circuit that stabilizes the initial operation of each FF.When the power switch (not shown) is turned on, a rectified and smoothed positive current is input from the sewing machine drive motor via the transformer. Then, the transistors T and 2 are connected until the Zener diode ZD reaches the Zener voltage.
conducts to make the output of the circuit 1 0, and when the Zener diode ZD reaches the Zener voltage and becomes conductive, the transistor Tr3 becomes conductive and T becomes non-conductive, making the output of the circuit 1 1.
ＬＳＷが閉路している時ナントゲート（以後Ｇ）３はＯ
，Ｇ４は１１Ｇ５は０、Ｇ６は１、Ｇ７は１であり、電
源スィッチがオンした直後にはＦＦ１にはセット入力に
０．リセット入力に１が入力してＱ出力はＯであり、こ
のＱ出力がＦＦ２ 、ＦＦ３ 、ＦＦ４ 、ＦＦ５のセ
ット入力となるが、Ｇ４の１によりＦＦ２のＱ出力が０
、Ｇ７の１によりＦＦ３のＱ出力は０．Ｇ２６の１によ
りＦＦ４Ｑ出力は０１ＦＦ５のＱは０である。When LSW is closed, Nantes gate (hereinafter referred to as G) 3 is O.
, G4 is 11, G5 is 0, G6 is 1, and G7 is 1. Immediately after the power switch is turned on, FF1 has a set input of 0. When 1 is input to the reset input, the Q output is O, and this Q output becomes the set input for FF2, FF3, FF4, and FF5, but due to 1 in G4, the Q output of FF2 becomes 0.
, G7's 1 causes the Q output of FF3 to be 0. Due to the 1 in G26, the FF4Q output is 01, and the Q of FF5 is 0.
針位置検知装置２はミシン主軸の回転角に対し、針上位
置を検知区間△Ｗ１（第２図）において検知し、また針
下位置を検知区間△Ｗ２において検知して、検知時に出
力０となる。The needle position detection device 2 detects the needle up position in the detection section △W1 (Fig. 2) and the needle down position in the detection section △W2 with respect to the rotation angle of the main shaft of the sewing machine, and outputs 0 at the time of detection. Become.
Ｒ１は補助モーター作動用リレー装置、Ｍ−Ｂは補助モ
ーター制動電磁石、Ｍ−８は安全装置作動電磁石、Ｍ−
Ｔは糸切り装置作動電磁石であり、各電磁石は入力１と
なった時に励磁されて各装置を作動する。R1 is a relay device for auxiliary motor activation, M-B is an auxiliary motor braking electromagnet, M-8 is a safety device activation electromagnet, M-
T is an electromagnet for operating the thread cutting device, and each electromagnet is excited when the input becomes 1 to operate each device.
糸切り装置（図示せず）はＭ−Ｔの付勢時に作動し、メ
スが主軸の回転角度Ｙ点（第２図）において針糸ループ
を捕捉し切断するものとする。It is assumed that the thread cutting device (not shown) is activated when M-T is energized, and the knife catches and cuts the needle thread loop at the rotation angle Y point of the main shaft (FIG. 2).
Ｗは速度検知機能を備えた単安定マルチバイブレータ−
（以後ワンショット）であり、前記検知装置２よりの信
号を０２５を介してトリガ端子（Ｂ端子）入力信号とし
、信号が１となった時にトリ力され所定の時間亜出力を
０にし、トリガ信号即ち針位置検知信号のパルス巾がセ
ット時間よりも長い時に０２６を１にし、パルス巾がセ
ット時間よりも短かい時にはクリアしてＧ２６を直ちに
０に戻す。W is a monostable multivibrator with speed detection function
(hereinafter referred to as one-shot), the signal from the detection device 2 is input to the trigger terminal (B terminal) via 025, and when the signal becomes 1, it is triggered and the sub-output is set to 0 for a predetermined time, and the trigger is triggered. When the pulse width of the signal, that is, the hand position detection signal, is longer than the set time, 026 is set to 1, and when the pulse width is shorter than the set time, it is cleared and G26 is immediately returned to 0.
Ｔｒ４のエミッタ端子はＧ２４及び電源電圧端子ａとに
接続し、コレクタ端子ｔま抵抗Ｒ２の中間部に接続する
。The emitter terminal of Tr4 is connected to G24 and the power supply voltage terminal a, and the collector terminal t is connected to the intermediate portion of the resistor R2.
上位置信号０が０２１を１、Ｇ２４をＯにすると、Ｔｒ
４ベース−エミッタ間に電位差が生じてＴｒ４が導通し
、端子ａの電源電流はＴ、のエミッターコレクタ間に流
れてＲ２、Ｒ１に流れる。When upper position signal 0 sets 021 to 1 and G24 to O, Tr
A potential difference is generated between the base and the emitter of Tr4, and Tr4 becomes conductive, and the power supply current at terminal a flows between the emitter collector of T and then to R2 and R1.
また上位置信号が１の時Ｇ２４は１となり％Ｔｒ４のベ
ース−エミッタ間には電位査がなくなり、Ｔｒ４は不導
通となって端子ａの電流はＲ２，Ｒ１を流れる。Further, when the upper position signal is 1, G24 becomes 1, and there is no potential difference between the base and emitter of Tr4, Tr4 becomes non-conductive, and the current at terminal a flows through R2 and R1.
従って上位置信号によりワンショットＷがトリ力される
時のセット時間△ｔ１と、下位置信号によりトリガされ
る時のセット時間△ｔ２とは、その時定数により△ｔ１
く△ｔ２となり、△ｔ２はミシンが停止しているのを確
認できる時間とする。Therefore, the set time △t1 when the one shot W is triggered by the upper position signal and the set time △t2 when triggered by the lower position signal are determined by the time constant △t1
Δt2 is assumed to be the time during which it can be confirmed that the sewing machine has stopped.
この発明の構成は以上のようになり、その動作を説明す
ると、第２図１においてペダル前踏み操作によりＬＳＷ
が開路してＴｒｌを導通し、Ｇ３が１、Ｇ４が０、Ｇ５
が１、Ｇ６がＯ，Ｇ７が瞬時的に０となってＦＦ１ 、
ＦＦ２ 、ＦＦ３のリセット入力となり各Ｑ出力を１と
する。The structure of this invention is as described above, and its operation will be explained. In FIG. 2, the LSW is
is open and conducts Trl, G3 is 1, G4 is 0, G5
becomes 1, G6 becomes 0, G7 instantly becomes 0, and FF1 becomes FF1.
It becomes a reset input for FF2 and FF3 and sets each Q output to 1.
Ｇ４の０によりＧｊ２が１．Ｇ１３が０．Ｇ１４が１と
なり、Ｇ１７をＯにしてＭ−Ｂが消勢すると共に、Ｇ１
５をｏ、Ｇ１６を１にしてＲ７が付勢し、補助モータを
駆動してミシンを低速駆動する。Gj2 becomes 1 due to 0 in G4. G13 is 0. G14 becomes 1, G17 becomes O, M-B is deactivated, and G1
5 is set to o, G16 is set to 1, R7 is energized, and the auxiliary motor is driven to drive the sewing machine at low speed.
ペダルをさらに前踏みすることによりクラッチが高速モ
ーターとミシンとを連動させ、ミシンは高速駆動する。By pressing the pedal further forward, the clutch connects the high-speed motor and the sewing machine, causing the sewing machine to drive at high speed.
上位置検知時に上位置信号０はＧ２１を１．Ｇ２４を０
にし、Ｇ２５が１となってワンショットＷのＢ入力とな
ってトリガ七、また下位置検知時に下位置信号０はＧ２
２を１゜Ｇ２３を０にし、Ｇ２５が１となってワンショ
ットＷをトリガするが、ミシンが高速駆動する時にはこ
れらの位置信号のパルス巾は△ｔ１及び△ｔ２より短か
く直ちにクリアされる。When the upper position is detected, the upper position signal 0 makes G21 1. G24 to 0
Then, G25 becomes 1 and becomes the B input of one-shot W, triggering 7. Also, when the lower position is detected, the lower position signal 0 becomes G2
2 is set to 1°, G23 is set to 0, and G25 becomes 1 to trigger one shot W. However, when the sewing machine is driven at high speed, the pulse width of these position signals is shorter than Δt1 and Δt2 and is immediately cleared.
ミシンを高速１駆動している前踏み操作からペダルを解
放すると、ＬＳＷは閉路となってＧ４及びＧ７が１とな
るがＦＦ１ 、ＦＦ２．ＦＦ３のＱ出力は１のまま変化
しない。When the pedal is released from the front pedal operation that drives the sewing machine at high speed 1, the LSW becomes a closed circuit and G4 and G7 become 1, but FF1, FF2. The Q output of FF3 remains 1 and does not change.
ミシンが減速されて低速となり、上位置検知区間を通過
する時に検出される上位置信号Ｏのパルス巾はワンショ
ットＷのセット時間△ｔ１よりも長くなり、Ｇ２５を介
してワンショットＷのＢ端子入力となってワンショット
Ｗをトリ力し、△ｔ１経過後にＱ出力が１に戻った時に
０２５はまだ１であるからＧ２６は０となってＦＦ４を
リセットし、Ｑ出力を１とする。The pulse width of the upper position signal O detected when the sewing machine is decelerated to a low speed and passes through the upper position detection section is longer than the set time Δt1 of the one shot W, and is passed through G25 to the B terminal of the one shot W. It becomes an input and tri-powers the one-shot W, and when the Q output returns to 1 after Δt1 has elapsed, since 025 is still 1, G26 becomes 0, resets the FF4, and sets the Q output to 1.
主軸半回転後の下位置検知によりＧ１０は１となって０
１２を０とし、Ｇ１３ 、Ｇ１４を介してＧ１５が１，
０１６がＯ，Ｇ１７が１となってＲ７が消勢すると共に
Ｍ−Ｂが付勢して補助モーターを停止し、ミシンを針下
位置に停止する。G10 becomes 1 and 0 by detecting the lower position after half a rotation of the main shaft.
12 is 0, G15 is 1 through G13 and G14,
016 becomes O, G17 becomes 1, R7 is deenergized, and M-B is energized to stop the auxiliary motor and stop the sewing machine at the needle down position.
ミシン停止後のペダル後踏み操作によりＴＳＷが閉路し
てＧ１８が１．Ｇ１９がＯ，Ｇ２０が１となってＭ−８
が付勢し、またＧ１２を１にしてＧ１３，１４を介しＧ
１５が０．Ｇ１６が１゜Ｇ１７が０となってＭ−Ｂが消
勢すると共にＲ９が付勢し、複助モーターを駆動してミ
シンを低速駆動する。After stopping the sewing machine, the TSW is closed by the second pedal operation, and G18 is set to 1. G19 becomes O and G20 becomes 1, making M-8
is energized, G12 is set to 1, and G is applied via G13 and 14.
15 is 0. When G16 becomes 1° and G17 becomes 0, M-B is deenergized and R9 is energized, driving the double auxiliary motor and driving the sewing machine at a low speed.
また同時に０１８の１によってＧ２７が０となりＦＦ５
をリセットしてＱ出力を１とし、Ｇ２９．Ｇ３０を介し
Ｍ−Ｔが付勢して糸切り装置を作動し、主軸回転角がＹ
点に達した時にミシン主軸の溝に案内されて糸切りメス
が針糸ループを捕捉し糸を切断する。At the same time, G27 becomes 0 due to 1 in 018, and FF5
is reset, the Q output is set to 1, and G29. M-T is energized via G30 to operate the thread trimming device, and the main shaft rotation angle is Y.
When the point is reached, the thread cutting knife is guided by the groove in the main shaft of the sewing machine, captures the needle thread loop, and cuts the thread.
針が下検知位置より上昇するとＧ２７は１となり、針が
上検知位置に達した時にＧ１１が１となってＧ２８がＯ
となり。When the needle rises from the lower detection position, G27 becomes 1, and when the needle reaches the upper detection position, G11 becomes 1 and G28 becomes O.
Next door.
ＦＦ５のＱ出力をＯにしてＱ出力を１にする。Set the Q output of FF5 to 0 and set the Q output to 1.
Ｑ出力によりＧ３０が０となってＭ−Ｔが消勢する。Due to the Q output, G30 becomes 0 and MT is deenergized.
また、ＦＦ５のＱ出力０によりＦＦ２をセットしてＦＦ
２のＱ出力を０とし、Ｇ１９及びＧ８が１となる。Also, set FF2 by Q output 0 of FF5 and FF
The Q output of 2 is set to 0, and G19 and G8 are set to 1.
これによりＧ１２は上位置検知時にＯとなり、Ｇ１３の
１及びＧ２９の１によりＧ１４が０となってＧ１６をＯ
，Ｇ１７を１にし、Ｍ−Ｂが付勢してＲ７が消勢し、補
助モーターを停止してミシンを針上位置に停止する。As a result, G12 becomes O when the upper position is detected, and G14 becomes 0 due to 1 in G13 and 1 in G29, causing G16 to become O.
, G17 are set to 1, M-B is energized and R7 is deenergized, the auxiliary motor is stopped, and the sewing machine is stopped at the needle-up position.
次にペダルの前踏み操作時の踏み込み量をわずかにした
ミシン低速駆動状態において、針が上検知区間を通過し
てからペダルを解放しＬＳＷをオフした時（第２図１１
）には、ペダル解放直後の下位置検知信号によりＧＩＯ
は１となり、Ｇ１６を０、Ｇ１７を１にしてＲが消勢し
Ｍ−Ｂが付勢して補助モーターを停止し、ミシンを針下
位置に停止する。Next, when the sewing machine is running at low speed with a small amount of front pedal depression, when the needle passes through the upper detection area, the pedal is released and the LSW is turned off (see Fig. 2, 11).
), the GIO is activated by the lower position detection signal immediately after the pedal is released.
becomes 1, G16 is set to 0, G17 is set to 1, R is deenergized, M-B is energized, the auxiliary motor is stopped, and the sewing machine is stopped at the needle down position.
このミシン停止時の下位置信号によりワンショットＷは
トリガされ、セット時間△ｔ２経過後にＱ出力を１にす
る。The one-shot W is triggered by the lower position signal when the sewing machine is stopped, and the Q output is set to 1 after the set time Δt2 has elapsed.
その後のペダル後踏み操作によりＴＳＷがオンして０１
８を１にしてＧ１９．Ｇ２０を介しＭ−８が付勢すると
共に、Ｇ１２が１となってＲが付勢、Ｍ−Ｂが消勢して
補助モーターを駆動しミシンを低速駆動する。After that, the TSW is turned on by the subsequent operation of the pedal, and the 01
G19 with 8 as 1. M-8 is energized via G20, G12 becomes 1, R is energized, and M-B is deenergized to drive the auxiliary motor and drive the sewing machine at low speed.
また同時に０２７がＯとなってＦＦ５のＱ出力を１とし
、Ｍ−Ｔが付勢して糸切り装置を作動し、主軸回転角が
Ｙ点に達した時に糸切りメスが針糸ループを捕捉し糸を
切断する。At the same time, 027 becomes O, the Q output of FF5 becomes 1, M-T is energized and the thread trimming device is operated, and when the main shaft rotation angle reaches the Y point, the thread trimming knife captures the needle thread loop. Cut the thread.
半回転後の上位置検知にＦＦ５のＱ出力をｏｔＱ出力を
１にし、Ｍ−８、Ｍ−Ｔが消勢すると共に、Ｒ９が消勢
しＭ−Ｂが付勢して補助モーターを停止し、ミシンを針
上位置に停止する。To detect the upper position after half a rotation, set the Q output of FF5 to otQ output, de-energize M-8 and M-T, de-energize R9, and energize M-B to stop the auxiliary motor. , stop the sewing machine in the needle up position.
次にペダルの前踏み操作時の踏み込み量を深くしたミシ
ン高速駆動状態において、急にペダルの解放、後踏み操
作を行なう時（第２図１１１）には、ＬＳＷのオフとＴ
ＳＷのオンとはほぼ同時に行なわれ、Ｍ−８が付勢する
と共にＧ１２を１に維持して引き続いてＲ７が付勢しＭ
−Ｂが消勢して補助モーターを駆動し、ミシンは補助モ
ーターの駆動速度まで減速される。Next, when the sewing machine is running at high speed with a deep pedal depression amount when the front pedal is depressed, when the pedal is suddenly released and the rear depression operation is performed (Fig. 2, 111), the LSW must be turned off and the T
SW is turned on almost simultaneously, M-8 is energized and G12 is maintained at 1, followed by R7 and M-8 is energized.
-B is deenergized to drive the auxiliary motor and the sewing machine is decelerated to the auxiliary motor drive speed.
減速時に上位置検知区間において発生する検知信号のパ
ルス巾がワンショットＷのセット時間△ｔ□よりも長く
なった時、ワンショットＷをトリガしてから△ｔ１経過
後に０２６を１にしてＦＦ４をリセットし、Ｑ出力を１
にする。When the pulse width of the detection signal generated in the upper position detection section during deceleration becomes longer than the one-shot W set time △t□, set 026 to 1 and turn FF4 after △t1 has elapsed after triggering the one-shot W. Reset and set Q output to 1
Make it.
主軸が半回転して下位置検知位置に達した時（Ｘ点）、
その検知信号によりＧ２７は０となってＦＦ５のＱ出力
を１にし、Ｇ３０は１となってＭ−Ｔが付勢して糸切り
装置を作動し、糸切り装置の作動時間△ｔ４経過後の主
軸回転角がＹに達した時、糸切りメスが針糸ループを捕
捉し糸を切断する。When the main shaft rotates half a turn and reaches the lower position detection position (point X),
Due to the detection signal, G27 becomes 0 and the Q output of FF5 becomes 1, G30 becomes 1, energizes M-T and operates the thread trimming device, and after the operating time △t4 of the thread trimming device has elapsed. When the main shaft rotation angle reaches Y, the thread cutting knife catches the needle thread loop and cuts the thread.
主軸がさらに半回転して上位置検知した時にＦＦ５のＱ
出力を１．０出力を０にし、Ｍ−８゜Ｍ−Ｔが消勢し、
Ｍ−Ｂが付勢しＲ７が消勢して補助モーターを停止し、
ミシンを針上位置に停止する。Q of FF5 when the main shaft rotates another half turn and detects the upper position
The output is set to 1.0, the output is set to 0, M-8゜M-T is deenergized,
M-B is energized and R7 is de-energized to stop the auxiliary motor,
Stop the sewing machine at the needle up position.
さらに、ペダルの踏み込み量をわずかにしたミシン低速
駆動状態において、ペダルを急に解放、後踏み操作する
と、針が上昇中にＬＳＷオフ。Furthermore, when the sewing machine is running at low speed with only a small amount of pedal depression, if the pedal is suddenly released or the rear pedal is operated, the LSW will turn off while the needle is rising.
ＴＳＷオンとなった場合にはミシンは前記（ｉｉｉ ）
と同様に作動停止し、また針が上検知位置通過後にＬＳ
Ｗオフ、ＴＳＷオンとなった場合には、ＴＳＷオンによ
り補助モーターが引き続き駆動するから主軸はさらに一
回転し、−回転後の上位置検知信号により、ワンショッ
トＷをトリガしてＦＦ４をリセットし、さらに半回転し
た時の下位置信号によりＧ２７をＯとしてＦＦ５のＱ出
力をＯにし、Ｍ−Ｔが付勢して糸切り装置を作動し、所
定位置において糸切りメスが針糸ループを捕捉して糸を
切断する。When the TSW is turned on, the sewing machine operates as described in (iii) above.
The operation stops in the same way as above, and after the needle passes the upper detection position, the LS
When the W is off and the TSW is on, the auxiliary motor continues to be driven by the TSW on, so the main shaft rotates one more time, and the upper position detection signal after the -rotation triggers the one-shot W and resets FF4. , When the lower position signal is further rotated half a rotation, G27 is set to O, the Q output of FF5 is set to O, M-T is energized, the thread trimming device is activated, and the thread trimming knife captures the needle thread loop at a predetermined position. and cut the thread.
主軸が半回転して上位置信号発生によりミシンを針上位
置に停止する。The main shaft rotates half a turn and the upper position signal is generated to stop the sewing machine at the needle upper position.
以上のようにこの発明によれば、ミシンを高速駆動する
状態からペダルを後踏み操作するのに関連する糸切り時
に、ミシン主軸の回転位相における針下位置検知区間よ
りも先行した位相において速度検知して速度検知信号を
発生し、針下位置検知信号発生時に直ちに糸切り信号を
発生して電磁石等を作用し、糸切装置を作動して糸を切
ると共に、主軸が下位置検知区間に所定時間位置する必
要がなく、前記Ｘ点からＸ点まで回転する時間が△ｔ４
となる補助モーター速度にすることができ、従来に比し
て速度が速くなり、ペダルを後踏み操作する時間が短縮
して、作業能率を向上すると共に、作業者の負担を軽減
する等の効果がある。As described above, according to the present invention, when thread trimming is associated with rear-depressing the pedal from a state in which the sewing machine is driven at high speed, the speed is detected in a phase that precedes the needle down position detection section in the rotational phase of the sewing machine main shaft. When the needle down position detection signal is generated, a thread trimming signal is immediately generated and an electromagnet is activated to operate the thread trimming device to cut the thread, and the main shaft is placed in a predetermined down position detection area. There is no need to position for a time, and the time to rotate from the X point to the X point is △t4
The speed of the auxiliary motor can be increased to , which is faster than before, and the time required to depress the pedal later is shortened, improving work efficiency and reducing the burden on the worker. There is.
第二の実施例として、ミシンを高速駆動状態からペダル
を後踏み操作するのに関連して、針上位置停止時に糸切
装置を作動するミシンにおいては。A second embodiment is a sewing machine in which a thread trimming device is operated when the needle is stopped at the upper position in conjunction with rear-depressing the pedal from a high-speed driving state.
従来はペダル操作に関連して針上位置信号により速度検
知をし、停止を確認してから糸切装置を作動させていた
が、本発明のものを利用するとワンショットＷの上位置
信号によるセット時間△ｔ１と下位置信号によるセット
時間△ｔ２との関係を△１１＞△ｔ２とし、下位置にお
いて所定低速を検知することにより、上位置信号発生時
に直ちにＭ−Ｔを付勢して糸切装置を作動し、ミシンを
停止することができるから、前記第一実施例と同様の効
果が得られる。Conventionally, the speed was detected using the needle top position signal in connection with pedal operation, and the thread trimming device was activated after confirming that the needle had stopped, but with the present invention, the speed can be detected using the needle top position signal. By setting the relationship between time △t1 and set time △t2 based on the lower position signal as △11>△t2, and detecting a predetermined low speed at the lower position, M-T is immediately activated to cut the thread when the upper position signal is generated. Since the device can be activated and the sewing machine can be stopped, the same effects as in the first embodiment can be obtained.
次に第３の実施例として主モーターに連動した状態から
ペダルを解放または後踏み操作するのに関連して、ミシ
ンを補助モーターに連動して補助モーター駆動速度まで
減速し、速度検知信号及び所定の針位置信号発生時に一
定の制動力をもつ補助モーターブレーキを作動させ、ミ
シンの主軸を針位置検知区間内に停止させるミシンにお
いて説明すると、第４図に示すように、ミシン主軸がペ
ダル操作後に補助モーターによる回転速度まで減速し、
主軸の回転角Ｐ１（針上位置）において速度検知信号を
発生し、回転角Ｐ２（針下位置）において針位置信号を
発生させるように構成すると、ＰｌからＲ２まで主軸の
回転角△Ｐ及び回転に要する時間は常に一定である。Next, as a third embodiment, in connection with releasing or rear-depressing the pedal from the state in which it is linked to the main motor, the sewing machine is linked to the auxiliary motor and decelerated to the auxiliary motor driving speed, and the speed detection signal and predetermined When a needle position signal is generated, an auxiliary motor brake with a certain braking force is activated, and the main shaft of the sewing machine is stopped within the needle position detection area. The auxiliary motor decelerates the rotation speed to
If a speed detection signal is generated at the rotation angle P1 (needle up position) of the main shaft and a needle position signal is generated at the rotation angle P2 (needle down position), the rotation angle △P and rotation of the main shaft from Pl to R2. The time required for this is always constant.
補助モーターブレーキが速度検知信号及び針下位置信号
発生に関連して作動すると共に検知速度をほぼ補助モー
ター駆動速度とすれば、Ｒ２における主軸の回転速度は
常に補助モーター速度となり、Ｒ２においてブレーキが
始動してから主軸が停止するまでの主軸の回転角は常に
一定となる。If the auxiliary motor brake operates in conjunction with the generation of the speed detection signal and needle down position signal, and the detected speed is approximately the auxiliary motor drive speed, the rotational speed of the main shaft at R2 will always be the auxiliary motor speed, and the brake will start at R2. The rotation angle of the spindle from the moment the spindle stops until the spindle stops is always constant.
従って、ペダル操作に関連して針を定位置に停止する時
、針をより正確な位置で停止することができるので、た
とえば、角縫目を形成するときのように針を下位置で停
止して布を回すような工程においては、剣先が針糸ルー
プを捕捉した状態に確実に停止できるから、針を中心に
布を回した時に針糸ループがねじられても針糸ループは
必らず剣先にかかつており、従って縫目形成時に目飛び
を生じることがなく、角縫目を確実に形成でき縫製品の
品質を向上する効果があると共に、針を上位置に停止し
た後にワイパーを作動させる場合には、針が針板上面か
ら所定の高さに確実に停止して、ワイパーの作動時に針
と交叉するのを防ぐ等の効果がある。Therefore, when stopping the needle in position in conjunction with pedal operation, the needle can be stopped in a more precise position, for example when stopping the needle in the down position, as when forming corner stitches. In the process of turning the fabric by using the needle, the needle thread loop can be reliably stopped with the tip catching the needle thread loop, so even if the needle thread loop is twisted when turning the fabric around the needle, the needle thread loop will not necessarily be twisted. The tip of the needle is curved, so there is no skipped stitches when forming stitches, and corner stitches can be formed reliably, improving the quality of sewn products.The wiper is also activated after the needle is stopped at the upper position. In this case, the needle is reliably stopped at a predetermined height from the upper surface of the throat plate, and it is effective to prevent the needle from intersecting with the needle when the wiper is operated.
また補助モーターブレーキが作用するのは、速度検知信
号及び針位置信号発生に関連した時のみであるから、ブ
レーキの摩耗を防ぎ耐久性を増す等の効果がある。Further, since the auxiliary motor brake acts only when the speed detection signal and the needle position signal are generated, it has the effect of preventing brake wear and increasing durability.
なお、上述した各実施例においては、いずれも針位置検
知装置の針位置検知信号により、主軸の速度を検出する
ものを示したが、他の実施例として、速度検知装置を針
位置検知装置とは別に且つ所定の作動信号を発生する針
位置検知区間より主軸の回転角位相に対し先行して配置
したり、またはその速度検知区間の一部が針位置検知区
間に主軸の回転角位相上で重なるように配置したり、さ
らに本実施例の速度検知回路に代えてセット時間の異な
る三筒のワンショットに上下信号を別々に入力しても同
様の効果が得られる。In each of the above-mentioned embodiments, the speed of the spindle is detected by the needle position detection signal of the needle position detection device, but in other embodiments, the speed detection device may be used as the needle position detection device. The needle position detection section that generates a predetermined operating signal may be placed ahead of the rotational angle phase of the main shaft, or a part of the speed detection section may be placed in the needle position detection section on the rotational angle phase of the main shaft. The same effect can be obtained by arranging them so as to overlap, or by inputting upper and lower signals separately to three one-shot cylinders having different set times instead of the speed detection circuit of this embodiment.
第１図は第１実施例の論理回路、第２図は針先運動曲線
に対応するタイムチャート、第３図はミシン主軸の位相
、第４図はミシン停止時の主軸回転速度曲線である。
２は針位置検出装置、２６及びＷは速度検出装置である
。FIG. 1 shows the logic circuit of the first embodiment, FIG. 2 shows a time chart corresponding to the needle tip motion curve, FIG. 3 shows the phase of the main shaft of the sewing machine, and FIG. 4 shows the main shaft rotational speed curve when the sewing machine is stopped. 2 is a needle position detection device, and 26 and W are speed detection devices.
Claims (1)
は糸切り等の作動をする他方向操作とを可能とするよう
にモーターに関連配置した操作装置と、 ミシン主軸に関連配置しその所定回転角範囲において発
生するパルス巾に関連して回転角速度を検知し所定の低
速度を検出して信号を発生する速度検出装置と、 ミシン主軸に関連配置しその回転角位相を検知し針の上
位置または下位置を検出して信号を発生する針位置検出
装置と、操作装置の一方向操作からの他方向または中間
操作時における速度検出装置及び針位置検出装置の信号
の発生に関連して糸切りまたはミシン停止等の作動信号
を発生するように関連した制御手段とを有するミシンに
おいて。 ミシン主軸の回転角度位相において、速度検出装置の検
知位相を針位置検出装置の検知位相に対して先行するよ
うにしたことを特徴とするミシンの制御装置。[Scope of Claims] 1. An operating device arranged in relation to the motor so as to enable operation in one direction to drive the sewing machine and operation in the other direction to stop the sewing machine or perform thread cutting, etc., and arranged in relation to the main shaft of the sewing machine. A speed detection device that detects the rotational angular velocity in relation to the pulse width generated in a predetermined rotational angle range and generates a signal by detecting a predetermined low speed; Related to the needle position detection device that detects the upper or lower position of the needle and generates a signal, and the signal generation of the speed detection device and needle position detection device when the operating device is operated in one direction to the other direction or during intermediate operation. and associated control means for generating activation signals such as thread trimming or sewing machine stop. 1. A control device for a sewing machine, characterized in that a detection phase of a speed detection device precedes a detection phase of a needle position detection device in a rotation angle phase of a main shaft of the sewing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7415775A JPS5939156B2 (en) | 1975-06-18 | 1975-06-18 | Sewing machine control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7415775A JPS5939156B2 (en) | 1975-06-18 | 1975-06-18 | Sewing machine control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS51150448A JPS51150448A (en) | 1976-12-24 |
| JPS5939156B2 true JPS5939156B2 (en) | 1984-09-21 |
Family
ID=13539028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7415775A Expired JPS5939156B2 (en) | 1975-06-18 | 1975-06-18 | Sewing machine control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939156B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63144941A (en) * | 1986-12-05 | 1988-06-17 | Toyoda Mach Works Ltd | Complex grinding device |
| JP2006102399A (en) * | 2004-10-08 | 2006-04-20 | Juki Corp | Sewing machine |
-
1975
- 1975-06-18 JP JP7415775A patent/JPS5939156B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63144941A (en) * | 1986-12-05 | 1988-06-17 | Toyoda Mach Works Ltd | Complex grinding device |
| JP2006102399A (en) * | 2004-10-08 | 2006-04-20 | Juki Corp | Sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS51150448A (en) | 1976-12-24 |
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