JP2000042278A - Control device for sewing machine - Google Patents

Control device for sewing machine

Info

Publication number
JP2000042278A
JP2000042278A JP11145935A JP14593599A JP2000042278A JP 2000042278 A JP2000042278 A JP 2000042278A JP 11145935 A JP11145935 A JP 11145935A JP 14593599 A JP14593599 A JP 14593599A JP 2000042278 A JP2000042278 A JP 2000042278A
Authority
JP
Japan
Prior art keywords
thread
blade
cutting
sewing machine
needle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11145935A
Other languages
Japanese (ja)
Other versions
JP4251714B2 (en
Inventor
Tsugutoshi Kubota
次勇 窪田
Takashi Nitsutou
隆 日塔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Juki Corp
Original Assignee
Juki Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Juki Corp filed Critical Juki Corp
Priority to JP14593599A priority Critical patent/JP4251714B2/en
Publication of JP2000042278A publication Critical patent/JP2000042278A/en
Application granted granted Critical
Publication of JP4251714B2 publication Critical patent/JP4251714B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To surely cut a thread by setting a driving amount of an X-Y driving means in such a manner that a cutting objective thread may approach the moving track of a blade part when the blade part of a movable blade and a fixed blade are engaged, based on the size of a needle eye which is selected by a selecting means and final sewing data before the thread cutting or the like. SOLUTION: A DIP switch 52 to select the radius of a needle eye is connected to a CPU 30 through an I/F 50, and by the setting of an on/off state of two switches of the DIP switch 52, the radius R of a needle eye and a spectrum (b) for an optimal thread cutting point from a needle eye center O are selected. At the time of a sewing, an idle feeding amount (c) is obtained by using the radius R and the spectrum (b) selected by the CPU 30. Then, right before a thread cutting, by an idle feeding by the idle feeding amount (c), a cutting objective thread is neared to the optimal thread cutting point (b), i.e., on the moving track of the blade part of a movable blade or its vicinity, and when a fixed blade and the blade part are engaged, the cutting objective thread is located at the approx. center of the blade part, and a thread cutting without an unfavorable cut is made possible.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、ミシンの制御装置
に係り、特に、記憶手段にXY座標値として記憶された
縫製パターンのデータに基づき、被縫製物を保持する布
押えとミシン頭部を相対的に移動させる自動ミシンにお
ける布側上糸及び下糸を切断する際に用いるのに好適
な、ミシンの制御装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine control device, and more particularly, to a sewing machine and a sewing machine head for holding a work to be sewn on the basis of sewing pattern data stored as XY coordinate values in storage means. The present invention relates to a sewing machine control device suitable for use when cutting a cloth-side upper thread and a lower thread in an automatic sewing machine that is relatively moved.

【0002】[0002]

【従来の技術】図1乃至図4に示す自動ミシンにおいて
は、図1に示すように、記憶手段(図示省略)にX−Y
座標値として記憶された縫製パターンのデータに基づき
X−Y駆動手段を制御することにより、上押え1及び下
押え2よりなる被縫製物保持用布押えと、ミシン頭部3
を相対的に移動させる。この自動ミシンにおけるX−Y
駆動手段は、ミシンベッド5の内部に取り付けられたX
軸パルスモータ6とY軸パルスモータ7よりなり、これ
らのパルスモータ6、7によって、作業台4の上に位置
する上押え1及び下押え2が、針棒8に対してX−Y駆
動される。
2. Description of the Related Art In an automatic sewing machine shown in FIGS. 1 to 4, as shown in FIG.
By controlling the XY driving means on the basis of the sewing pattern data stored as the coordinate values, the cloth holder for holding the work to be sewn comprising the upper presser 1 and the lower presser 2 and the sewing machine head 3
Are relatively moved. XY in this automatic sewing machine
The driving means is an X mounted inside the sewing machine bed 5.
An upper pulse presser 1 and a lower presser 2 located on the work table 4 are driven XY with respect to the needle bar 8 by the pulse motors 6 and 7. You.

【0003】この自動ミシンは、ボビンの下糸導出部と
中釜剣先との間に針落ち位置がある半回転釜を有してお
り、又その自動ミシンに設けられた糸切断手段は、図
2、図4に示すように、糸手繰り部9bを手前に向けて
待機する動メス9と、該動メス9と共働して布側上糸及
び下糸を切断する固定メス10とから構成されている。
[0003] This automatic sewing machine has a half-turn rotary hook having a needle drop position between a lower thread lead-out portion of a bobbin and a middle hook knife point. 2. As shown in FIG. 4, a moving knife 9 which stands by with the thread reeling portion 9b facing forward, and a fixed knife 10 which cooperates with the moving knife 9 to cut the cloth side upper thread and lower thread. Have been.

【0004】前記動メス9は、糸捌き部先端9a、糸手
繰り部9b及び糸切断刃部9c(目玉と称する孔の前後
に刃部が形成されている)を有している。いくつかのリ
ンク13を介してミシン上軸の回転が動作メス9基部の
穴9dに嵌合された支軸(図示省略)に伝えられ、これ
により動メス9は前記支軸を中心に往復動される。
The moving knife 9 has a thread separating portion tip 9a, a thread reeling portion 9b, and a thread cutting blade 9c (blades are formed before and after a hole called an eyeball). The rotation of the upper shaft of the sewing machine is transmitted to the spindle (not shown) fitted into the hole 9d of the base of the operating knife 9 via several links 13, whereby the moving knife 9 reciprocates around the spindle. Is done.

【0005】前記固定メス10は、動メス9の上側に位
置し、先端の糸切断刃部が針落ち位置の少し手前に位置
している。
The fixed knife 10 is located above the moving knife 9 and the thread cutting blade at the tip is located slightly before the needle drop position.

【0006】半回転釜の釜14の上側には釜上ばね11
が固定され、その刃の針落ち位置を中心とした中心部
に、特殊形状をした糸制御用の孔12が形成されてい
る。図2において、15は半回転釜を回転させる釜軸、
16はボビンケース、16aはボビンケース16の回転
を係止するための角(horn)である。
[0006] Above the shuttle 14 of the half-turn shuttle, the shuttle spring 11 is provided.
Is fixed, and a thread control hole 12 having a special shape is formed at the center of the blade centered on the needle drop position. In FIG. 2, 15 is a shuttle shaft for rotating a half-turn shuttle,
Reference numeral 16 denotes a bobbin case, and 16a denotes a horn for locking the rotation of the bobbin case 16.

【0007】このような自動ミシンにおける針先の動き
と、各信号の関係の例を図3に示す。図3における
は、針先の動きを示す曲線であり、略正弦波の軌跡を有
し、上死点は上軸角度0度のときである。又、は針板
の位置を示し、はX−Y送りの動作区間である。ミシ
ン上軸には、上軸角度50度を示す上位置信号を発信
する上位置センサ(図示省略)と、上軸角度135度を
示す下位置信号を発信する下位置センサ(図示省略)が
取り付けられており、X−Y送りの駆動は、これらのセ
ンサの信号により、針が針板より上昇しているときに行
われるように中央処理装置(CPU)(図示省略)によ
り制御される。
FIG. 3 shows an example of the relationship between the movement of the needle point and each signal in such an automatic sewing machine. FIG. 3 shows a curve indicating the movement of the needle tip, which has a substantially sinusoidal trajectory, and the top dead center is when the upper axis angle is 0 degree. Further, indicates the position of the needle plate, and indicates an XY feed operation section. An upper position sensor (not shown) for transmitting an upper position signal indicating an upper shaft angle of 50 degrees and a lower position sensor (not shown) for transmitting a lower position signal indicating an upper shaft angle of 135 degrees are attached to the upper shaft of the sewing machine. The driving of the XY feed is controlled by a central processing unit (CPU) (not shown) so that the driving of the XY feed is performed when the needle is raised from the needle plate by the signals of these sensors.

【0008】このような従来の自動ミシンにおける、糸
切断装置による布側上糸及び下糸の切断は、図4に示す
ようにして行われている。
In such a conventional automatic sewing machine, the cutting of the upper thread and the lower thread on the cloth side by the thread cutting device is performed as shown in FIG.

【0009】即ち、動メス9が図4(1)に示す待機状
態から、図4(2)、図4(3)に示すように往動し、
動メス9の往動により、下糸24及び布側上糸22の間
に動メス9の糸捌き部先端9aが入り込み、更に上糸2
2のループ間に入り込んで捌き動作を行う。上糸22は
釜に十分に引き込まれており、図4(4)に示すよう
に、動メス9の捌き部先端9aが確実に上糸22のルー
プ内に侵入することができる。次いで、図4(5)に示
すように、動メス9が最前進し、捌かれた布に連なる側
の上糸22と下糸24とが動メス9の捌き部外周を越
え、糸手繰り部9bへ侵入する。その後、図4(6)に
示すように、動メス9が復動を開始し、布に連なる側の
上糸22、下糸24の順に糸手繰り部9bが捕捉し、上
糸22が天秤(図示省略)により引き上げられる時、図
4(7)に示すように、上糸22は動メス9に巻き付く
ようにして保持される。そして、下糸24は動メス9に
引き出され、必要量が繰り出される。このとき、下糸2
4の引き出し速度が速すぎてボビンが余分に回転(空
転)し、次の縫い始めに悪影響を及ぼすことがないよう
に、動メス9の復動速度が制御される。最後に、図4
(8)に示す動メス9の更なる復動動作によって、糸切
断刃部9cと固定メス10とが係合する時、布側上糸2
2、下糸24の切断が行われる。
That is, the moving knife 9 moves forward from the standby state shown in FIG. 4A as shown in FIGS.
By the forward movement of the moving knife 9, the leading end 9 a of the thread separating portion of the moving knife 9 enters between the lower thread 24 and the cloth-side upper thread 22,
2 and performs a loosening operation. The upper thread 22 is sufficiently drawn into the shuttle, so that the leading end 9a of the separating portion of the moving knife 9 can reliably enter the loop of the upper thread 22 as shown in FIG. Next, as shown in FIG. 4 (5), the moving knife 9 moves forward most, and the upper thread 22 and the lower thread 24, which are connected to the loosened cloth, pass over the outer circumference of the loosening portion of the moving knife 9 and the yarn hand-rolling section. 9b. Thereafter, as shown in FIG. 4 (6), the moving knife 9 starts to return, and the hand thread winding portion 9b catches the upper thread 22 and the lower thread 24 in the order of the side connected to the cloth, and the upper thread 22 is balanced. 4 (7), the upper thread 22 is held so as to wind around the moving knife 9, as shown in FIG. Then, the lower thread 24 is pulled out by the moving knife 9, and the required amount is fed out. At this time, lower thread 2
The reciprocating speed of the moving knife 9 is controlled so that the drawing speed of the moving knife 4 is not so fast that the bobbin is rotated excessively (idling) and does not adversely affect the next sewing start. Finally, FIG.
When the thread cutting blade 9c and the fixed knife 10 are engaged by the further reciprocating operation of the moving knife 9 shown in (8), the cloth side upper thread 2 is engaged.
2. The lower thread 24 is cut.

【0010】従来、上記した自動ミシンにおいては、針
板の針孔17の中心Oに針が上下動するので、針糸22
を糸捌き部先端9aが捕捉するためには、動メス9の刃
部9cの移動軌跡Aが、前記中心Oの右側となるように
しているので、次のような問題が起きている。即ち、糸
切断前の布送り方向が図5の右から左に行われる場合に
は、その布送りによって、切断対象糸20(布側針糸2
2、下糸24)が動メス9の刃部9cの移動軌跡Aより
外れる方向(図5の左側)に寄せられており、糸手繰り
部9bに捕捉された切断対象糸20が、図5に破線で示
すように、動メス9の刃部9cの中心から外れる。
Conventionally, in the above-described automatic sewing machine, the needle moves up and down to the center O of the needle hole 17 of the needle plate, so that the needle thread 22
In order for the leading end 9a of the thread separating portion to catch the movement locus A of the blade portion 9c of the moving knife 9 on the right side of the center O, the following problem occurs. That is, when the cloth feed direction before the yarn cutting is performed from right to left in FIG. 5, the cloth feed is performed by the cloth feed.
2, the lower thread 24) is deviated from the moving trajectory A of the blade 9c of the moving knife 9 (left side in FIG. 5), and the thread 20 to be cut captured by the thread reeling section 9b is shown in FIG. As shown by the broken line, the moving knife 9 is deviated from the center of the blade portion 9c.

【0011】刃部9cは球状をしており、前記移動軌跡
Aと一致する刃部9c中心付近においては、刃部9cと
固定メス10との係合が確実となるが、中心部から外れ
た位置での刃部9cと固定メス10の傾向は、固定メス
10の傾きや動メス球面部と刃部の異心等のばらつきに
より不確実なので、上記したように、切断対象糸20が
刃部9c中心から外れた場合に切断不良が生じることが
ある。
The blade portion 9c has a spherical shape, and near the center of the blade portion 9c, which coincides with the movement locus A, the engagement between the blade portion 9c and the fixed knife 10 is ensured, but the blade portion 9c deviates from the center portion. Since the inclination between the blade 9c and the fixed knife 10 at the position is uncertain due to the inclination of the fixed knife 10 and the variation in the eccentricity between the spherical portion of the moving knife and the blade, the thread 20 to be cut is fixed to the blade 9c as described above. If it is off center, poor cutting may occur.

【0012】このような問題点を解決するべく、出願人
は、縫いを形成する糸切断前の最終運針後に、図6に示
す如く、動メス9による糸切断時に針板の針孔17の中
心Oに対して動メス刃部9cの移動軌跡A上近辺に切断
対象糸20を位置させるように、X−Y駆動手段(図示
省略)を駆動して、縫いを形成せずに布のみを送る、い
わゆる空送りをする発明を日本特許庁に出願(本発明出
願時未公開)している。
In order to solve such a problem, as shown in FIG. 6, after the final operation of the needle before cutting the thread to form the sewing, the applicant has to adjust the center of the needle hole 17 of the needle plate 17 when the moving knife 9 cuts the thread. The XY driving means (not shown) is driven so that the thread 20 to be cut is positioned near the upper side of the movement locus A of the moving knife blade 9c with respect to O, and only the cloth is fed without forming the sewing. An application for so-called idle feeding has been filed with the Japan Patent Office (not disclosed when the present invention was filed).

【0013】具体的に説明すると、前出図3において、
は、上軸角度135度の下位置でオンとなる糸切断カ
ム信号である。この糸切断カム信号がオンになると、
動メス9が動作を開始し、上軸角度が約300度のとき
に動メス9の捌きが終了し、上軸角度50度で一連の動
作を終了する。ところで、糸切断に際し、ミシン上軸の
速度は停止の数針前より減速され、糸切断カム信号が
オンになる時点では、ミシンの回転数は約200rpm
となっている。従って、最終布送り後の上軸角度135
度での糸切断カム信号のオンから、動メス捌き終了の
上軸角度300度までの165度は、時間にして約14
0ミリ秒(ms)となる。
More specifically, in FIG.
Is a thread cutting cam signal that is turned on at a position below the upper shaft angle of 135 degrees. When this thread cutting cam signal is turned on,
The moving knife 9 starts operating, and when the upper axis angle is about 300 degrees, the loosening of the moving knife 9 ends, and a series of operations ends at the upper axis angle of 50 degrees. By the way, at the time of thread cutting, the speed of the upper shaft of the sewing machine is reduced a few stitches before stopping, and when the thread cutting cam signal is turned on, the rotation speed of the sewing machine is about 200 rpm.
It has become. Therefore, the upper shaft angle 135 after the final cloth feed is set.
165 degrees from the turning on of the thread cutting cam signal in degrees to the upper axis angle of 300 degrees at the end of moving knife separation is about 14
0 milliseconds (ms).

【0014】そこで、CPUが上軸角度135度の下位
置信号を検出して糸切断カム信号をオンしたとき
に、同時に作動されるタイマを設け、そのタイマが所定
時間(約140ms)を計時した後に、被縫製物保持用
布押え(上押え1及び下押え2)をX−Y相対駆動して
空送りする。この空送りは、切断対象糸20を、針孔1
7の中心O(座標中心)に対して動メス刃部9cの移動
軌跡A側(第4象限側)に寄せる。
Therefore, when the CPU detects the lower position signal of the upper shaft angle of 135 degrees and turns on the thread cutting cam signal, a timer is provided which is operated simultaneously, and the timer measures a predetermined time (about 140 ms). Thereafter, the cloth presser for holding the workpiece (the upper presser 1 and the lower presser 2) is XY-relatively driven to perform idle feeding. This idle feeding is performed by moving the yarn 20 to be cut into the needle hole 1.
The moving knife blade 9c is moved toward the movement locus A side (the fourth quadrant side) with respect to the center O (coordinate center) of 7.

【0015】この空送りにおける、上押え1と下押え2
の送り方向及び送り量は、最終針の運針データあるいは
布押えの相対駆動データより、CPUで演算して決定す
る。即ち、図7に矢印付きのa、b、cとして示した、
縫いデータにより決定される最終針の布押えの相対駆動
ベクトルa、針穴中心Oから最良糸切断点(通常は刃部
9cの移動軌跡A上あるいはその近辺)のベクトルb、
空送りベクトルcと、針孔17の半径Rとの関係におい
て、図7(1)に示すように、最終針ピッチが針孔の半
径R以下である場合には、次式により演算する。
In this idle feeding, the upper presser 1 and the lower presser 2
The feed direction and feed amount are determined by the CPU from the hand movement data of the last needle or the relative drive data of the work clamp. That is, shown as a, b, and c with arrows in FIG.
The relative drive vector a of the presser foot of the final needle determined by the sewing data, the vector b of the best thread cutting point from the center O of the needle hole (usually on or near the movement locus A of the blade 9c),
In the relationship between the idle feed vector c and the radius R of the needle hole 17, when the final needle pitch is equal to or smaller than the radius R of the needle hole as shown in FIG.

【0016】[0016]

【数1】 (Equation 1)

【0017】又、図7(2)に示すように、最終針ピッ
チが針孔の半径R以上である場合には、次式により演算
する。
As shown in FIG. 7 (2), when the final needle pitch is equal to or larger than the radius R of the needle hole, the calculation is performed by the following equation.

【0018】[0018]

【数2】 (Equation 2)

【0019】このような演算により、切断対象糸20は
前記移動軌跡A上あるいはその近辺の最良糸切断点bに
寄せられるので、切断されるべき糸が該点bと刃部9c
を結ぶ線、理想的にはその両点b、9cと糸手繰り部9
bの最下点9b(図6)とを結ぶ線に略沿って位置する
ことになり、従来のように刃部9cから大きく外れるこ
とがなく、刃部9cと固定メス10の係合時に切断対象
糸は刃部9cの中心付近に位置するようになるので、糸
切断が確実となり、又、糸経路が平面上直線に近くなる
ので、布裏の糸残り量が短くなる。
By such an operation, the yarn 20 to be cut is moved to the best yarn cutting point b on or near the movement locus A, so that the yarn to be cut is moved to the point b and the blade portion 9c.
, Ideally the two points b and 9c and the thread reeling portion 9
b is located substantially along the line connecting the lowermost point 9b (FIG. 6) of FIG. Since the target yarn is located near the center of the blade portion 9c, the yarn is reliably cut, and the yarn path becomes closer to a straight line on a plane, so that the remaining amount of yarn on the back of the cloth becomes shorter.

【0020】[0020]

【発明が解決しようとする課題】しかしながら、異なる
太さの糸や針に変更された場合には、針穴17の半径R
の異なる針板に変更したり、それに伴なって前記移動軌
跡Aを変えるように動メスを調節しなければならない
が、上記の方法では、針孔17の半径Rあるいは最良糸
切断点のベクトルbの入力が固定されているので、空送
り量が一定となるため、切断対象糸が前記移動軌跡A上
あるいはその近辺である最良糸切断点に位置するまで布
を空送りすることができず、針孔の大きさの変化が大き
い場合等においては切断不良が発生するという問題点を
有していた。
However, if the thread or the needle is changed to a different thickness, the radius R of the needle hole 17 is changed.
The moving knife must be adjusted so as to change to the different needle plate of the needle and the movement locus A accordingly. In the above-mentioned method, the radius R of the needle hole 17 or the vector b of the best thread cutting point is required. Is fixed, so that the amount of idle feeding is constant, and it is not possible to idle-feed the cloth until the yarn to be cut is located at the best yarn cutting point on or near the movement trajectory A, In the case where the size of the needle hole changes greatly, there is a problem that cutting failure occurs.

【0021】本発明は、前記従来の問題点を解消するべ
くなされたもので、針孔の大きさや糸の太さに応じて、
適切な最良糸切断点に糸を相対移動して、糸を確実に切
断できるようにすることを課題とする。
The present invention has been made in order to solve the above-mentioned conventional problems. According to the size of the needle hole and the thickness of the thread,
It is an object to relatively move a yarn to an appropriate best yarn cutting point so that the yarn can be reliably cut.

【0022】[0022]

【課題を解決するための手段】本発明は、運針データを
記憶する記憶手段と、該記憶手段に記憶された運針デー
タに従って、被縫製物を保持する布押えとミシン頭部を
相対的に移動させるX−Y駆動手段と、固定メス、及び
固定メスと係合する刃部を有し所定移動軌跡上を移動す
る動メスとを有し、動メスの移動時に針板の針孔を通る
糸を捕捉してから固定メスと前記刃部との係合により切
断する糸切断手段と、前記動メスの刃部と固定メスの係
合前に前記動メスの刃部の移動軌跡側に切断対象糸を寄
せるように前記X−Y駆動手段を駆動する糸切制御手段
とを有するミシンの制御装置であって、前記針孔の大き
さ又は前記刃部の移動軌跡に近接する特定位置の少なく
とも一方に関する複数の情報の中から選択する選択手段
と、該選択手段により選択された針孔の大きさ又は特定
位置情報、及び糸切断前の最終運針データに基づいて、
切断対象糸が、前記動メスの刃部と固定メスの係合時
に、刃部の移動軌跡に近接位置するように、前記X−Y
駆動手段の駆動量を設定する設定手段と、を備えること
により、前記課題を解決したものである。
According to the present invention, there is provided a storage means for storing hand movement data, and a cloth presser and a sewing machine head for holding a workpiece to be moved relatively in accordance with the hand movement data stored in the storage means. XY driving means, a fixed knife, and a moving knife having a blade engaged with the fixed knife and moving on a predetermined movement trajectory, and a thread passing through the needle hole of the needle plate when the moving knife is moved And a thread cutting means for cutting by engaging the fixed knife with the blade, and a cutting object on the moving locus side of the blade of the moving knife before engagement of the blade of the moving knife with the fixed knife. A thread trimming control means for driving the XY drive means to move the thread, wherein at least one of a size of the needle hole or a specific position close to a movement locus of the blade portion Selecting means for selecting from a plurality of pieces of information about Ri size or specific location information of the selected needle hole, and based on the final hand motion data before yarn cutting,
When the cutting target thread is engaged with the blade of the moving knife and the fixed knife, the XY is so positioned as to be close to the movement locus of the blade.
The above problem is solved by providing a setting means for setting a driving amount of the driving means.

【0023】又、前記設定手段が、切断対象糸が刃部の
中心部の移動軌跡に近接位置するように、X−Y駆動手
段の駆動量を設定するものである。
Further, the setting means sets the driving amount of the XY driving means so that the yarn to be cut is positioned close to the movement locus of the center of the blade portion.

【0024】[0024]

【発明の実施の形態】以下図面を参照して、本発明の実
施形態を詳細に説明する。
Embodiments of the present invention will be described below in detail with reference to the drawings.

【0025】本実施形態の制御装置を図8に示す。この
制御装置には、制御を行うためのCPU30と、システ
ムプログラム等が記憶されているリードオンリーメモリ
(ROM)32と、作業用のランダムアクセスメモリ
(RAM)34と、縫製パターンデータを記憶するため
の、ユーザにより書き込みが可能な不揮発性ROMであ
るEPROM36が接続されている。
FIG. 8 shows a control device according to this embodiment. The control device includes a CPU 30 for performing control, a read-only memory (ROM) 32 in which a system program and the like are stored, a random access memory (RAM) 34 for work, and a sewing pattern data. An EPROM 36, which is a non-volatile ROM rewritable by a user, is connected.

【0026】又、前記CPU30には、ミシンモータ1
8を駆動するためのミシンモータドライバ42が、ミシ
ンモータインターフェイス(I/F)40を介して、X
軸パルスモータ6及びY軸パルスモータ7を駆動するた
めのパルスモータドライバ46が、パルスモータインタ
ーフェイス(I/F)44を介して接続されている。更
に、前記CPU30には、本発明により針孔の半径を選
択するためのディップ(DIP)スイッチ52が、入力
インターフェイス(I/F)50を介して接続されてい
る。
The CPU 30 includes a sewing machine motor 1.
The sewing machine motor driver 42 for driving the motor 8 is connected to the X through the sewing machine motor interface (I / F) 40.
A pulse motor driver 46 for driving the axis pulse motor 6 and the Y-axis pulse motor 7 is connected via a pulse motor interface (I / F) 44. Further, a dip (DIP) switch 52 for selecting the radius of the needle hole according to the present invention is connected to the CPU 30 via an input interface (I / F) 50.

【0027】前記ディップスイッチ52を構成する2つ
のスイッチDIPSW1とDIPSW2のオンオフ状態
の設定により、針孔の半径Rと針穴中心Oから最良糸切
断点のベクトルbが、例えば図9のように選択される。
図9において、最良糸切断点のベクトルbの単位はmm
である。
By setting the two switches DIPSW1 and DIPSW2 constituting the dip switch 52 to the on / off state, the vector b of the best thread cutting point is selected from the needle hole radius R and the needle hole center O as shown in FIG. 9, for example. Is done.
In FIG. 9, the unit of the vector b of the best yarn cutting point is mm.
It is.

【0028】他の構成及び基本的な動作は、図1乃至図
7を参照して説明した先行例と同様であるので、説明は
省略する。
Other configurations and basic operations are the same as those of the preceding example described with reference to FIGS. 1 to 7, and thus description thereof is omitted.

【0029】以下、本発明に特有の動作について説明す
る。
The operation specific to the present invention will be described below.

【0030】縫製に際しては、縫製条件に合わせて、前
記ディップスイッチ52により、針孔半径Rと最良糸切
断点bの組合せを選択する。すると、前記CPU30に
より、選択されたRとbを用いて、前出(1)式及び
(2)式の演算が行われ、空送り量cが求められる。
At the time of sewing, the combination of the needle hole radius R and the best thread cutting point b is selected by the dip switch 52 according to the sewing conditions. Then, using the selected R and b, the CPU 30 performs the calculations of the above formulas (1) and (2), and obtains the idle feed amount c.

【0031】従って、糸切断直前に、選択入力された針
孔半径Rに基づいて演算された空送り量cの空送りによ
り、切断対象糸20は最良糸切断点b、即ち前記刃部9
cの移動軌跡A上もしくはその近辺に必ず寄せられるの
で、固定メス10と刃部9cが係合する時、切断対象糸
20は刃部9cの略中心に位置することになり、切断不
良が発生することがない。
Therefore, just before the yarn cutting, the target yarn 20 is cut at the best yarn cutting point b, that is, the blade portion 9 by the idle feeding of the idle feeding amount c calculated based on the needle hole radius R selected and input.
When the fixed knife 10 and the blade 9c are engaged with each other, the thread 20 to be cut is positioned substantially at the center of the blade 9c, and a cutting failure occurs. Never do.

【0032】本実施形態においては、針孔の大きさが針
孔半径Rとされ、該針孔半径Rを選択する選択手段が2
個のディップスイッチで構成され、針孔の半径Rと最良
糸切断点のベクトルbのペアで選択するようにされてい
たが、選択手段の構成や選択可能な針孔半径Rの種類は
これに限定されない。例えば、ディップスイッチを1個
のみとして、2段階で切換可能としたり、針孔半径R選
択用のディップスイッチと最良糸切断点のベクトルb選
択用のディップスイッチを分けたり、あるいは、針孔半
径Rのみ変え、最良糸切断点のベクトルbは不変として
もよい。
In the present embodiment, the size of the needle hole is defined as the needle hole radius R, and the selection means for selecting the needle hole radius R is two.
The dip switch is composed of a plurality of dip switches, and the selection is made by a pair of the needle hole radius R and the vector b of the best thread cutting point. Not limited. For example, only one dip switch is used to enable switching in two stages, a dip switch for selecting the needle hole radius R and a dip switch for selecting the vector b of the best thread cutting point are separated, or the needle hole radius R And the vector b of the best yarn cutting point may be unchanged.

【0033】あるいは、ディップスイッチの代りに、数
値を直接設定できるロータリスイッチ等を使用して、針
孔の半径Rと、最良糸切断点のベクトルbのX座標及び
Y座標を直接数値で設定できるようにしてもよい。
Alternatively, the radius R of the needle hole and the X coordinate and the Y coordinate of the vector b of the best thread cutting point can be directly set by numerical values by using a rotary switch or the like capable of directly setting a numerical value instead of the dip switch. You may do so.

【0034】あるいは、ディップスイッチやロータリス
イッチのようなハードウェアのスイッチではなく、EP
ROMのようなメモリをCPU30に接続して、パネル
操作によりメモリに書き込み、選択設定できるようにし
てもよい。
Alternatively, instead of a hardware switch such as a dip switch or a rotary switch, an EP
A memory such as a ROM may be connected to the CPU 30 and written into the memory by a panel operation so that selection and setting can be performed.

【0035】[0035]

【発明の効果】本発明によれば、切断対象糸の糸切断時
の目標位置を、針孔の大きさに合わせて最適な位置に設
定できる。従って、針や糸の太さにより針孔の大きさが
異なる針板に変更しても、針孔の大きさ等を選択するこ
とにより、針板毎に最適な糸寄せのための空送りが達成
され、糸の切断不良を無くして、糸を確実に切断するこ
とができる。
According to the present invention, the target position at the time of yarn cutting of the yarn to be cut can be set to an optimum position according to the size of the needle hole. Therefore, even if the size of the needle hole is changed to a needle plate having a different size depending on the thickness of the needle or the thread, by selecting the size of the needle hole, etc., the idle feed for the optimum yarn shifting for each needle plate can be performed. This is achieved and the yarn can be reliably cut without any yarn cutting failure.

【図面の簡単な説明】[Brief description of the drawings]

【図1】従来の自動ミシンの全体構成を示す斜視図FIG. 1 is a perspective view showing the overall configuration of a conventional automatic sewing machine.

【図2】従来の糸切断手段の構成を示す、一部を切り欠
いて示した斜視図
FIG. 2 is a partially cutaway perspective view showing a configuration of a conventional yarn cutting means.

【図3】前記従来の自動ミシンにおける針先の動きと各
信号との関係を示すタイムチャート
FIG. 3 is a time chart showing a relationship between a movement of a needle point and each signal in the conventional automatic sewing machine.

【図4】前記従来の糸切断手段における糸切断動作を説
明する斜視図
FIG. 4 is a perspective view illustrating a yarn cutting operation of the conventional yarn cutting means.

【図5】同じく従来の糸切断時における切断対象糸と動
メス刃部の移動軌跡との関係を示す平面図
FIG. 5 is a plan view showing the relationship between the thread to be cut and the movement locus of the moving knife blade when the conventional thread is cut.

【図6】出願人が先に出願した関連技術における自動ミ
シンの糸切断時における動作を説明する平面図
FIG. 6 is a plan view for explaining the operation of the automatic sewing machine at the time of thread cutting in the related art previously applied by the applicant.

【図7】本発明に関わる糸切断時における空送りデータ
を説明する平面図
FIG. 7 is a plan view illustrating idle feed data at the time of thread cutting according to the present invention.

【図8】本発明の実施形態の制御装置の全体構成を示す
ブロック線図
FIG. 8 is a block diagram showing an overall configuration of a control device according to an embodiment of the present invention.

【図9】本発明に関わる実施形態で用いられているディ
ップスイッチで選択される針孔半径と最良糸切断点のベ
クトルの関係の例を示す図表
FIG. 9 is a table showing an example of a relationship between a needle hole radius selected by a dip switch used in an embodiment according to the present invention and a vector of a best yarn cutting point.

【符号の説明】[Explanation of symbols]

1…上押え 2…下押え 3…ミシン頭部 4…作業台 5…ベッド 6…X軸パルスモータ 7…Y軸パルスモータ 8…針棒 9…動メス 9a…糸捌き部先端 9b…糸手繰り部 9c…糸切断刃部 10…固定メス 17…針板の針孔 18…ミシンモータ R…針孔半径 20…切断対象糸 22…上糸 24…下糸 a…最終針の布押えの相対駆動ベクトル b…最良糸切断点のベクトル c…空送りベクトル 30…CPU 32…ROM 34…RAM 36…EPROM 52…ディップ(DIP)スイッチ DESCRIPTION OF SYMBOLS 1 ... Upper presser 2 ... Lower presser 3 ... Sewing machine head 4 ... Work table 5 ... Bed 6 ... X-axis pulse motor 7 ... Y-axis pulse motor 8 ... Needle bar 9 ... Moving knife 9a ... Thread separating end 9b ... Thread reeling Part 9c: Thread cutting blade part 10: Fixed knife 17: Needle hole of needle plate 18: Sewing machine motor R: Needle hole radius 20: Thread to be cut 22: Upper thread 24: Lower thread a: Relative drive of the presser foot of the last needle Vector b: Vector of the best thread cutting point c: Jump feed vector 30 ... CPU 32 ... ROM 34 ... RAM 36 ... EPROM 52 ... Dip (DIP) switch

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】運針データを記憶する記憶手段と、 該記憶手段に記憶された運針データに従って、被縫製物
を保持する布押えとミシン頭部を相対的に移動させるX
−Y駆動手段と、 固定メス、及び固定メスと係合する係合する刃部を有し
所定移動軌跡上を移動する動メスとを有し、動メスの移
動時に針板の針孔を通る糸を捕捉してから固定メスと前
記刃部との係合により切断する糸切断手段と、 前記動メスの刃部と固定メスの係合前に前記動メスの刃
部の移動軌跡側に切断対象糸を寄せるように前記X−Y
駆動手段を駆動する糸切断制御手段とを有するミシンの
制御装置であって、 前記針孔の大きさ又は前記刃部の移動軌跡に近接する特
定位置の少なくとも一方に関する複数の情報の中から選
択する選択手段と、 該選択手段により選択された針孔の大きさ又は特定位置
情報、及び糸切断前の最終運針データに基づいて、切断
対象糸が、前記動メスの刃部と固定メスの係合時に、刃
部の移動軌跡に近接位置するように、前記X−Y駆動手
段の駆動量を設定する設定手段と、 を備えたことを特徴とするミシンの制御装置。
1. A storage means for storing hand movement data, and a cloth presser for holding an object to be sewn and a sewing machine head for relatively moving the sewing machine head in accordance with the hand movement data stored in the storage means.
-A Y-drive means, a fixed knife, and a moving knife having an engaging blade engaging with the fixed knife and moving on a predetermined movement locus, and passing through the needle hole of the needle plate when the moving knife moves. A thread cutting means for catching a thread and cutting it by engagement between the fixed knife and the blade, and cutting the blade along the moving trajectory of the moving knife before engaging the blade with the fixed knife. X-Y so as to move the target yarn
A sewing machine control device having a thread cutting control means for driving a driving means, wherein the sewing machine selects from a plurality of pieces of information relating to at least one of a size of the needle hole or a specific position close to a movement locus of the blade portion. The selecting means, based on the size or specific position information of the needle hole selected by the selecting means, and the final needle movement data before cutting the thread, engages the thread to be cut with the blade of the moving knife and the fixed knife. And a setting means for setting a driving amount of the XY driving means so as to be positioned close to a movement locus of the blade portion.
【請求項2】前記設定手段が、切断対象糸が刃部の中心
部の移動軌跡に近接位置するように、X−Y駆動手段の
駆動量を設定することを特徴とする請求項1記載のミシ
ンの制御装置。
2. The apparatus according to claim 1, wherein said setting means sets the driving amount of the XY driving means so that the cutting target thread is positioned close to the movement locus of the center of the blade. Sewing machine control device.
JP14593599A 1998-05-28 1999-05-26 Sewing machine control device Expired - Fee Related JP4251714B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14593599A JP4251714B2 (en) 1998-05-28 1999-05-26 Sewing machine control device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP14770698 1998-05-28
JP10-147706 1998-05-28
JP14593599A JP4251714B2 (en) 1998-05-28 1999-05-26 Sewing machine control device

Publications (2)

Publication Number Publication Date
JP2000042278A true JP2000042278A (en) 2000-02-15
JP4251714B2 JP4251714B2 (en) 2009-04-08

Family

ID=26476914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14593599A Expired - Fee Related JP4251714B2 (en) 1998-05-28 1999-05-26 Sewing machine control device

Country Status (1)

Country Link
JP (1) JP4251714B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006314514A (en) * 2005-05-12 2006-11-24 Juki Corp Thread cutter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006314514A (en) * 2005-05-12 2006-11-24 Juki Corp Thread cutter
JP4642545B2 (en) * 2005-05-12 2011-03-02 Juki株式会社 Thread trimmer

Also Published As

Publication number Publication date
JP4251714B2 (en) 2009-04-08

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