JPS64222Y2 - - Google Patents
Info
- Publication number
- JPS64222Y2 JPS64222Y2 JP1980160495U JP16049580U JPS64222Y2 JP S64222 Y2 JPS64222 Y2 JP S64222Y2 JP 1980160495 U JP1980160495 U JP 1980160495U JP 16049580 U JP16049580 U JP 16049580U JP S64222 Y2 JPS64222 Y2 JP S64222Y2
- Authority
- JP
- Japan
- Prior art keywords
- pedal
- resistance value
- rotation angle
- sewing machine
- motor
- 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
Links
- 238000009958 sewing Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 2
- 238000009966 trimming Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
- Control Of Electric Motors In General (AREA)
Description
【考案の詳細な説明】
この考案は、前踏み操作及び後踏み操作可能と
したペダルをもつミシンの制御装置に関し、特に
ペダル操作に関連してミシンを駆動停止するとと
もにミシンの所定の作動機構を制御するための信
号を取り出すための装置に関するものである。[Detailed description of the invention] This invention relates to a control device for a sewing machine that has a pedal that can be operated with the front pedal and the rear pedal. The present invention relates to a device for extracting signals for control.
従来、ミシンを駆動するためにペダルを前踏み
操作するとき、その前踏み初期位置への操作に関
連してミシンの起動状態を感知する起動信号を発
生し、糸切り手段や押え上げ手段を作用するため
にペダルの後踏み操作に関連して糸切り信号や押
え上げ信号を発生するようにしていたが、従来に
おいてはこれらの信号を検出するために、ペダル
装置にリミツトスイツチやフオトスイツチ等のス
イツチを配置し、その操作に関連してスイツチを
オンオフさせ信号を検出するようにしていたの
で、多数のスイツチを必要としてコストを高価に
するとともに構造が複雑となり、リミツトスイツ
チは耐久性に劣りフオススイツチは塵埃付着によ
り通電不確実やノイズが生ずる等の欠点があり、
また位置調節等の作業が煩雑となる欠点を生じ
た。 Conventionally, when a pedal is pressed forward to drive a sewing machine, a start signal is generated to detect the start-up state of the sewing machine in relation to the operation of the front foot to the initial position, and a start signal is generated to activate thread trimming means and presser foot lifting means. In order to do this, thread trimming signals and presser foot lifting signals are generated in conjunction with the rear pedal operation, but in the past, in order to detect these signals, switches such as limit switches and photo switches were installed in the pedal device. Since the switch is placed on the switch and the switch is turned on and off in connection with its operation, the signal is detected, which requires a large number of switches, increases the cost, and complicates the structure.The limit switch has poor durability, and the limit switch is prone to dust accumulation. There are disadvantages such as uncertainty in current flow and generation of noise.
Further, there was a drawback that operations such as position adjustment were complicated.
この考案は、上記従来の欠点を除去することを
目的とする。 This invention aims to eliminate the above-mentioned conventional drawbacks.
この考案の実施例を図面により説明すると、
テーブル1上方に載置したミシン2は主軸(図
示しない)に支持したプーリー3とテーブル1下
方に支持したモータ4のプーリー5との間をベル
ト6により連結し、テーブル1下方には第3図実
線Aの中間位置より鎖線Bの前方位置と鎖線Cの
後方位置とに水平軸7を中心に回動可能にペダル
8を支持し、ペダル8は常には中間位置に位置す
るように弾性力によりバランスを保たれている。
ペダル8の先端に連結桿9の下端を回動可能に支
持し、その上端を機枠に回動可能に支持した作動
レバー10に対し連結桿9の上下動により作動レ
バー10を回動するように連結し、作動レバー1
0にはペダル操作量を電気的な変化量に変換する
制御体11が連結配置してある。 An embodiment of this invention will be explained with reference to the drawings. A sewing machine 2 placed above a table 1 is connected by a belt 6 between a pulley 3 supported on a main shaft (not shown) and a pulley 5 of a motor 4 supported below the table 1. A pedal 8 is supported below the table 1 so as to be rotatable about a horizontal axis 7 from an intermediate position shown by solid line A in FIG. is maintained in balance by elastic force so that it is located at an intermediate position.
The lower end of a connecting rod 9 is rotatably supported at the tip of the pedal 8, and the upper end thereof is rotatably supported on the machine frame.The operating lever 10 is rotated by vertical movement of the connecting rod 9. and actuating lever 1.
A control body 11 that converts the amount of pedal operation into an electrical amount of change is connected to and arranged at 0.
制御体11は、ペダル8を後方位置Cと中間位
置Aよりわずかに前方位置方向へ回動した初期位
置B′との間の回動範囲△t1において操作するのに
関連し低抗値を変化する第一の可変抵抗R1(第4
図)と、初期位置B′と前方位置Bとの間の回動
範囲△t2において操作するのに関連して抵抗値を
変化する第二の可変抵抗R2(第4図)が配置して
ある。 The control body 11 maintains a low resistance value in relation to operating the pedal 8 in a rotation range Δt 1 between the rear position C and the initial position B' which is slightly rotated in the direction of the front position from the intermediate position A. The first variable resistance R 1 (fourth
) and a second variable resistor R 2 (Fig. 4) whose resistance value changes in relation to the operation in the rotation range Δt 2 between the initial position B' and the forward position B is arranged. There is.
なお、本実施例のミシン2には、糸切り手段及
び押え上げ手段(図示しない)が設けてあり、両
手段は各別の電磁石(図示しない)により作用さ
れる。 The sewing machine 2 of this embodiment is provided with thread cutting means and presser foot lifting means (not shown), and both means are operated by separate electromagnets (not shown).
次に本実施例の電気回路について説明する。 Next, the electric circuit of this embodiment will be explained.
電源Vcとグランドとの間に前記可変抵抗R1,
R2を各別に接続する。第一の可変抵抗R1は、ペ
ダルの後方位置Cにおいて小抵抗値となり初期位
置B′において大抵抗値となるようにペダル操作
量に比例して抵抗値を変化し、第二の可変抵抗
R2は、初期位置B′において大抵抗値となり前方
位置Bにおいて小抵抗値となるように操作量に比
例して抵抗値を変化する。 The variable resistor R 1 is connected between the power supply Vc and the ground.
Connect R 2 separately. The first variable resistor R1 changes its resistance value in proportion to the amount of pedal operation so that it has a small resistance value at the rear position C of the pedal and a large resistance value at the initial position B', and the second variable resistor
R2 changes its resistance value in proportion to the manipulated variable so that it becomes a large resistance value at the initial position B' and a small resistance value at the forward position B.
抵抗R1の接触子に接続した比較回路Mは低、
中、高三種の基準電圧X、M、Zに対する抵抗
R1の出力電圧rの高低を各別に比較し、基準電
圧Y、Zに対し電圧Vが越えるとき各別にLレベ
ル出力となり基準電圧Xに対し電圧vが下降する
ときLレベルの出力となる並列の出力x、y、z
を発生する。 The comparator circuit M connected to the contact of resistance R 1 is low,
Resistance to three types of medium and high reference voltages X, M, and Z
Compare the output voltage r of R 1 separately, and when the voltage V exceeds the reference voltages Y and Z, the output becomes L level, and when the voltage v decreases with respect to the reference voltage X, the output becomes L level. Parallel output x, y, z
occurs.
出力xのパルスはミシンを起動する起動信号と
なり、出力yのパルスは押え上げ手段を作用する
押え上げ信号、出力zは糸切り手段を作用する糸
切り信号となる。 The pulse of the output x becomes a starting signal for starting the sewing machine, the pulse of the output y becomes a presser foot lifting signal that acts on the presser foot lifting means, and the output z becomes a thread cutting signal that acts on the thread cutting means.
抵抗R2の接触子に接続した駆動回路Dは抵抗
R2に抵抗値に反比例した速度でミシンモータ4
を駆動するように、即ちペダル8の前踏み操作量
に比例した速度でミシンを駆動するように、モー
タ4への駆動電流を制御する。 The drive circuit D connected to the contact of resistance R 2 is a resistance
Sewing machine motor 4 at a speed inversely proportional to the resistance value to R2 .
In other words, the drive current to the motor 4 is controlled so as to drive the sewing machine at a speed proportional to the amount of forward depression of the pedal 8.
この考案は以上のような構成であり、ペダル8
を解放する中間位置Aのときには、抵抗R1の出
力vは基準レベルXとYの間の電圧状態であり、
低抗R2は最大抵抗値となつてミシンは停止して
いる。 This invention has the above-mentioned configuration, and the pedal 8
At intermediate position A, where R1 is released, the output v of resistor R1 is in a voltage state between reference levels X and Y,
Low resistance R 2 becomes the maximum resistance value and the sewing machine stops.
ペダル8を前踏み操作すると、初期位置B′に
おいて抵抗R1の出力vは基準レベルXより下降
し、比較回路Mの出力xはLレベルとなり起動信
号が発生する。初期位置B′を越えて前踏み操作
すると抵抗R2の抵抗値が操作に比例して減少し、
これにより駆動回路Dはモータ4を抵抗値に反比
例した速度で駆動するように駆動電流を制御す
る。 When the pedal 8 is pressed forward, the output v of the resistor R1 drops from the reference level X at the initial position B', and the output x of the comparator circuit M goes to L level, generating a start signal. When the front pedal is operated beyond the initial position B', the resistance value of resistance R 2 decreases in proportion to the operation,
Thereby, the drive circuit D controls the drive current so as to drive the motor 4 at a speed inversely proportional to the resistance value.
ペダル8を前踏み操作から後方位置へ操作する
と、抵抗R2の抵抗値は最大となつてモータ4を
停止するとともに、抵抗R1の出力vは基準電圧
Yを越えた後に基準電圧Zを越え、比較回路Mは
出力yがLレベルになつてから出力zがLレベル
となる。従つて押え上げ信号が発生してから糸切
り信号が発生する。 When the pedal 8 is operated from the forward position to the rear position, the resistance value of the resistor R2 reaches its maximum and stops the motor 4, and the output v of the resistor R1 exceeds the reference voltage Y and then the reference voltage Z. , the output z of the comparator circuit M becomes the L level after the output y becomes the L level. Therefore, the thread trimming signal is generated after the presser foot lifting signal is generated.
なお本実施例においては、第一の可変抵抗R1
の出力vを比較回路MにおいてX、Y、Zの三種
の基準電圧に対して比較するようにしたが、用途
に応じて基準電圧の数を増減して出力すべき信号
の数を所望の数にすることができる。またその信
号の用途は本実施例においては押え上げ、糸切
り、起動の各信号として用いたが、返し縫い等他
の用途の信号に用いてもよい。 Note that in this embodiment, the first variable resistor R 1
The output v of is compared with three types of reference voltages X, Y, and Z in the comparison circuit M, but the number of signals to be output can be adjusted to the desired number by increasing or decreasing the number of reference voltages depending on the application. It can be done. Further, in this embodiment, the signals are used as signals for lifting the presser foot, thread trimming, and starting, but they may also be used for other purposes such as reverse stitching.
また本実施例においては、第二の可変抵抗R2
の抵抗値に反比例する速度で駆動するように駆動
回路Dによりモータ4への駆動電流を制御するも
のを示したが、比較回路Mと同様に抵抗R2の出
力を複数の基準電圧と比較し段階的に速度制御す
るようにしてもよい。 Furthermore, in this embodiment, the second variable resistor R 2
The drive circuit D controls the drive current to the motor 4 so that it is driven at a speed that is inversely proportional to the resistance value of the motor 4, but as with the comparator circuit M, the output of the resistor R2 is compared with multiple reference voltages. The speed may be controlled in stages.
またモータは直流モータ、電磁クラツチモータ
のように電気的に速度制御するものであればよ
い。 Further, the motor may be one whose speed is controlled electrically, such as a DC motor or an electromagnetic clutch motor.
また、抵抗R1、R2はペダルの回転角に対し正
比例、または反比例のどちらかにすればよい。 Furthermore, the resistances R 1 and R 2 may be either directly proportional or inversely proportional to the rotation angle of the pedal.
以上のようにこの考案によれば、ペダルの前踏
みまたは後踏み操作に関連し、ミシンの所定の作
動機構を作動する作動信号を検出するのに抵抗値
の変化に関連して検出するようにしたので、従来
のようなスイツチをペダルに関連配置する必要が
ないから、構成を簡単にして部品点数を少なくし
コストを廉価にし、また回路のみで検出できるの
で耐久性を向上し且つ塵埃等のノイズに影響を受
けず常に安定した正確な動作が行なえ、調節もボ
リユーム調節による回路的な作業でよいので能率
を向上する効果が得られる。 As described above, according to this invention, an operating signal for operating a predetermined operating mechanism of the sewing machine is detected in relation to a change in resistance value in relation to a front or rear pedal operation. Therefore, there is no need to place a switch in relation to the pedal as in the past, so the configuration is simplified, the number of parts is reduced, and costs are reduced.Furthermore, since detection can be performed only with a circuit, durability is improved and dust etc. It can always operate stably and accurately without being affected by noise, and the volume adjustment can be done using a circuit, which has the effect of improving efficiency.
第1図は本実施例のミシンの正面図、第2図は
ペダル装置の側面図、第3図はペダルの動作説明
図、第4図は本実施例の電気回路、第5図はタイ
ムチヤートである。
Fig. 1 is a front view of the sewing machine of this embodiment, Fig. 2 is a side view of the pedal device, Fig. 3 is an explanatory diagram of the operation of the pedal, Fig. 4 is the electric circuit of this embodiment, and Fig. 5 is a time chart. It is.
Claims (1)
動手段と、 一方位置C及びそれより離隔した他方位置B並
びに両位置の間の中間位置Aとに一固定直線を中
心に回動可能に機枠に支持し常には中間位置に保
持する弾性力を受け、かかと踏み操作により中間
位置から一方位置の間に回動可能としつま先踏み
操作により中間位置から他方位置の間に回動可能
としたペダル8と、をもつ工業用ミシンにおい
て、 少なくともペダルの中間位置Aよりも他方位置
Bに近接した初期位置B′と一方位置Cとの間の
回転角範囲に対応して設け回転角に応じて抵抗値
を変化する第1抵抗器R1及び少なくともペダル
の前記初期位置と他方位置Bとの間の回転角範囲
に対応して設け回転角に応じて抵抗値を変化する
第2抵抗器R2とをもちペダルに関連配置した制
御体11と、 第1抵抗器R1に接続し前記初期位置の所定回
転角に対応する抵抗値を検出してモータを起動す
る信号を発生し中間位置Aよりも一方位置C側の
所定回転角に対応する抵抗値を検出して作動手段
を作動する信号を発生する検出回路Mと、 第2抵抗器R2に接続しその抵抗値の変化に比
例した速度で駆動するようにモータの駆動速度を
制御する駆動回路Dとを備えたミシンの制御装
置。[Claims for Utility Model Registration] A motor connected to the main shaft of the sewing machine, an electrically actuated operating means connected to a predetermined mechanism of the sewing machine, one position C, the other position B separated from it, and an intermediate position between both positions. It is supported on the machine frame so as to be rotatable about a fixed straight line at position A, and is always supported by an elastic force that keeps it in the intermediate position, and can be rotated between the intermediate position and one position by pressing the heel, and can be operated by pressing the toe. In an industrial sewing machine having a pedal 8 which is rotatable between an intermediate position and the other position, the pedal 8 is rotatable between an initial position B' which is closer to the other position B than the intermediate position A of the pedal, and one position C. a first resistor R1 whose resistance value changes according to the rotation angle, and a rotation angle provided corresponding to the rotation angle range between at least the initial position and the other position B of the pedal; A control body 11 is connected to the pedal and has a second resistor R2 that changes its resistance value according to the rotation angle, and the control body 11 is connected to the first resistor R1 to detect a resistance value corresponding to a predetermined rotation angle at the initial position. a detection circuit M that generates a signal to start the motor, detects a resistance value corresponding to a predetermined rotation angle on the one side C side from the intermediate position A, and generates a signal to actuate the actuating means; and a second resistor. A control device for a sewing machine comprising a drive circuit D that is connected to R2 and controls the drive speed of the motor so that the motor is driven at a speed proportional to a change in the resistance value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1980160495U JPS64222Y2 (en) | 1980-11-10 | 1980-11-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1980160495U JPS64222Y2 (en) | 1980-11-10 | 1980-11-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5782896U JPS5782896U (en) | 1982-05-22 |
JPS64222Y2 true JPS64222Y2 (en) | 1989-01-05 |
Family
ID=29519480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1980160495U Expired JPS64222Y2 (en) | 1980-11-10 | 1980-11-10 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS64222Y2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50106739A (en) * | 1974-01-24 | 1975-08-22 | ||
JPS5268547A (en) * | 1975-12-04 | 1977-06-07 | Janome Sewing Machine Co Ltd | Electric sewing machine |
-
1980
- 1980-11-10 JP JP1980160495U patent/JPS64222Y2/ja not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50106739A (en) * | 1974-01-24 | 1975-08-22 | ||
JPS5268547A (en) * | 1975-12-04 | 1977-06-07 | Janome Sewing Machine Co Ltd | Electric sewing machine |
Also Published As
Publication number | Publication date |
---|---|
JPS5782896U (en) | 1982-05-22 |
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