JPH06218173A - Presser foot control device for sewing machine - Google Patents
Presser foot control device for sewing machineInfo
- Publication number
- JPH06218173A JPH06218173A JP5009868A JP986893A JPH06218173A JP H06218173 A JPH06218173 A JP H06218173A JP 5009868 A JP5009868 A JP 5009868A JP 986893 A JP986893 A JP 986893A JP H06218173 A JPH06218173 A JP H06218173A
- Authority
- JP
- Japan
- Prior art keywords
- presser foot
- pedal
- sewing machine
- foot lifting
- lifting device
- 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
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ミシンの押え上げ装置
を駆動する制御装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for driving a presser foot lifting device of a sewing machine.
【０００２】[0002]
【従来の技術】従来、ペダルの前方踏み込みによりミシ
ンを回転させ、ペダルを中立位置に戻すことによりミシ
ンを停止させるとともに、ペダルを浅く踏み返すことに
より押え上げ装置を駆動し、また、ペダルを更に深く踏
み返すことにより糸切り動作を行うようにした２段踏み
返し機構のペダルを有するミシンの制御装置が存在す
る。この装置において、例えば、ペダルの浅い踏み返し
と同期して、ある一定時間通常の電圧で押え上げ装置を
駆動する制御技術があった。2. Description of the Related Art Conventionally, the sewing machine is stopped by pushing the pedal forward to rotate the sewing machine and returning the pedal to a neutral position, and the foot is lifted back to drive a presser foot lifting device. There is a control device for a sewing machine having a pedal with a two-step stepping-back mechanism that is configured to perform a thread cutting operation by deeply stepping back. In this device, for example, there is a control technique of driving the presser foot lifting device at a normal voltage for a certain period of time in synchronization with shallow pedaling.
【０００３】図６にこの従来の押え上げ装置駆動タイム
チャートを示す。ペダル１３の浅い踏み返しに同期して
ＣＰＵ３４が押え上げ駆動信号を出力し、トランジスタ
３２ａ（図３参照）を駆動する。最初は押えを上位置に
向かって上げだすため３００ｍｓ（Ｔ２）まではフルオ
ンし、その後は発熱を抑えるために約２００Ｈｚのスイ
ッチング動作をする。押え上げソレノイドに流れる電流
は、トランジスタ駆動開始と同時に、ソレノイドの抵抗
値とインダクタンスとで決まる時定数で増えだし、機械
的押え圧に打ち勝つトルクを発生する電流値ｉ１に達す
ると、押えは上昇しだし、３００ｍｓ（Ｔ２）以前には
上位置に達する。その後スイッチング動作に移行し、ト
ランジスタ３２ａがＯＦＦの間は、ソレノイドの電流は
フライホイールダイオード３２ｂ（図３参照）を通して
減少し、ＯＮの間は増えるという動作を繰り返し、押え
を上位置に保持し得る電流値ｉ３を保つ。この保持し得
る電流値ｉ３では押えが下位置にある状態から上げだす
ことはできない。FIG. 6 shows a time chart for driving the conventional presser foot lifting device. The CPU 34 outputs a presser foot lifting drive signal in synchronization with the shallow depression of the pedal 13 to drive the transistor 32a (see FIG. 3). At first, the presser is raised to the upper position so that it is fully turned on for 300 ms (T2), and thereafter, a switching operation of about 200 Hz is performed to suppress heat generation. The current flowing through the presser foot lifting solenoid begins to increase at the time constant determined by the resistance value and the inductance of the solenoid at the same time when the transistor starts to be driven. However, the upper position is reached before 300 ms (T2). After that, the operation shifts to the switching operation, and while the transistor 32a is OFF, the current of the solenoid is decreased through the flywheel diode 32b (see FIG. 3) and increased while ON, the operation of holding the presser foot in the upper position can be repeated. The current value i3 is maintained. With this holdable current value i3, the presser foot cannot be lifted from the lower position.
【０００４】また、別の従来技術として、特公昭６３−
６４９９６号公報に開示されているような、ペダルの浅
い踏み返し後、ある一定時間遅延後に通常の電圧で押え
上げ装置を駆動する制御技術もあった。As another conventional technique, Japanese Patent Publication No. 63-
There is also a control technique as disclosed in Japanese Patent No. 64996 that drives the presser foot lifting device with a normal voltage after a certain time delay after a shallow pedal return.
【０００５】図７にその１例を示す。ペダルの浅い踏み
返しから４０ｍｓ（Ｔ４）遅延後に押え上げ装置９の駆
動用トランジスタをＯＮする。FIG. 7 shows an example thereof. The drive transistor of the presser lifting device 9 is turned on after a delay of 40 ms (T4) from the shallow depression of the pedal.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、ペダル
の浅い踏み返しと同期して、ある一定時間通常の電圧で
押え上げ装置を駆動する方式の場合、ペダルを更に深く
踏み返して糸切り動作をさせる際に、深い踏み返し信号
が４０ｍｓ（Ｔ１）あたりで発生する。よって押え上げ
装置が応答してしまう場合があり、糸締まりが悪くなっ
たりする。また、前記方式の欠点を補うために、ペダル
の浅い踏み返し後一定時間の経過後に押え上げ装置を駆
動する方式があるが、踏み返し開始より押えが上がるま
での時間は、前記従来方式より遅延時間４０ｍｓ（Ｔ
４）遅い１２０ｍｓ（Ｔ６）と常に遅れることになる。However, in the case of the system in which the presser foot lifting device is driven by the normal voltage for a certain period of time in synchronization with the shallow depression of the pedal, the pedal is depressed deeper to perform the thread trimming operation. At this time, a deep stepping-back signal is generated around 40 ms (T1). Therefore, the presser foot lifting device may respond, and the thread tightness may worsen. In order to compensate for the drawbacks of the above method, there is a method in which the presser foot lifting device is driven after a certain period of time has elapsed after shallow pedaling, but the time from the start of stepping back until the presser foot rises is delayed compared to the conventional method. Time 40ms (T
4) 120 ms (T6), which is late, is always delayed.
【０００７】本発明は、上述した問題点を解決するため
になされたものであり、その目的は、ペダルの踏み返し
による糸切り時に、押え上げ装置を応答させることな
く、また、押え上げ装置を駆動する際の応答遅れを極力
少なくするようにしたミシンの制御装置を提供すること
にある。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a presser foot lifting device without causing the presser foot lifting device to respond when thread cutting is performed by depressing the pedal. It is an object of the present invention to provide a control device for a sewing machine that minimizes a response delay during driving.
【０００８】[0008]
【課題を解決するための手段】この目的を達成するため
に本発明は、特に、ペダルの浅い踏み返しに同期して第
１の一定時間は押え上げ装置をスイッチング駆動し通常
より低い電圧で駆動し、その後の第２の一定時間はフル
オンさせ通常電圧にて駆動する制御手段を備えたもので
ある。In order to achieve the above object, the present invention particularly relates to switching the presser foot lifting device for a first fixed time in synchronization with shallow pedaling of the pedal and driving it with a voltage lower than usual. However, the control means for fully turning it on for the second fixed time thereafter is driven with the normal voltage.
【０００９】[0009]
【作用】上記の構成を有する本発明の押え上げ制御装置
では、ペダルの浅い踏み返しに同期してスイッチング駆
動している期間は、押え上げ装置に電流は流れてはいる
ものの、押え上げ装置を上昇させるまでのトルクはない
ので押え上げは応答しない。また、その後フルオン駆動
に移った場合、電流は零から流れ出すのではなく、スイ
ッチング時の電流値から増えだすので押え上げが上昇す
る場合の遅れは、単に遅延時間をとった場合より短くな
る。In the presser foot lifting control device of the present invention having the above-described structure, the presser foot lifting device is operated while the current is flowing to the presser foot lifting device during the period of switching drive in synchronization with the shallow depression of the pedal. Since there is no torque to raise it, the presser foot does not respond. Further, when the full-on drive is subsequently performed, the current does not start flowing from zero but increases from the current value at the time of switching, and therefore the delay when the presser foot is raised becomes shorter than when the delay time is simply taken.
【００１０】[0010]
【実施例】以下、本発明を具体化した一実施例を図面を
参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【００１１】本実施例は、工業用本縫いミシンに本発明
を適用した場合のものである。In this embodiment, the present invention is applied to an industrial lockstitch sewing machine.
【００１２】この本縫いミシンＭについて説明するが、
このミシンＭは一般的な工業用ミシンと同様なので簡単
に説明するものとする。The lockstitch sewing machine M will be described below.
Since this sewing machine M is similar to a general industrial sewing machine, it will be briefly described.
【００１３】この本縫いミシンＭは、図１に示すよう
に、作業用テーブル１０に装着されたミシンベッド部１
と、そのベッド部１の右端部から立設された脚柱部２
と、その脚柱部２からベッド部１に対向するように左方
へ延びるアーム部３とから構成されている。ベッド部１
には、送り歯を上下動させる送り歯上下動機構（図示
略）及び前後動させる送り歯前後動機構（図示略）と、
縫製終了時に上糸と下糸とを同時に切断する自動糸切り
機構（図示略）と、糸輪捕捉器（図示略）などが設けら
れている。As shown in FIG. 1, the lockstitch sewing machine M includes a sewing machine bed portion 1 mounted on a work table 10.
And the pedestal portion 2 which is erected from the right end of the bed portion 1.
And an arm portion 3 extending leftward from the pedestal portion 2 so as to face the bed portion 1. Bed part 1
Includes a feed dog up-and-down moving mechanism (not shown) for moving the feed tooth up and down, and a feed dog forward-backward moving mechanism (not shown) for moving back and forth,
An automatic thread trimming mechanism (not shown) that simultaneously cuts the upper thread and the lower thread at the end of sewing, a thread catcher (not shown), and the like are provided.
【００１４】また、アーム部３には、縫針５を下端に装
着可能な針棒４を上下動させる針棒駆動機構（図示
略）、針棒４の後ろ側には押え上げ装置９により上下動
可能な押え棒７が支持されており、その押え棒７の下端
には押え足８が取り付けられている。Further, a needle bar drive mechanism (not shown) for vertically moving a needle bar 4 to which a sewing needle 5 can be attached at a lower end is provided on the arm portion 3, and a back and forth of a needle bar 4 is vertically moved by a presser lifting device 9. A possible presser bar 7 is supported, and a presser foot 8 is attached to the lower end of the presser bar 7.
【００１５】前記テーブル１０の直ぐ下側にはモータ１
２が配設され、テーブル１０を支持する作業台１１に取
り付けられている。また、作業台１１の下端部には、ミ
シン操作の為のペダル１３が揺動可能に支持され、この
ペダル１３に下端部が連結され上下方向に延びる連結棒
１４の上端部は、作業台１１に取り付けられた制御ボッ
クス１５内の操作スイッチ３０（図２参照）に連結され
ている。Immediately below the table 10 is a motor 1
2 is arranged and attached to a workbench 11 that supports the table 10. A pedal 13 for operating the sewing machine is swingably supported at the lower end of the workbench 11. The upper end of a connecting rod 14 that is connected to the pedal 13 and extends in the vertical direction has a lower end. It is connected to the operation switch 30 (see FIG. 2) in the control box 15 attached to the.
【００１６】このペダル１３は、水平な中立位置と、中
立位置に対して前側を踏み込んだ前踏み位置と、中立位
置に対して踵側へ踏み返した踏み返し位置とに揺動可能
に構成される。操作スイッチ３０は、ペダル１３の前踏
み位置への踏み込み時にモータ１２の起動信号を出力
し、中立位置へ戻すことにより起動停止信号を出力す
る。また、ペダル１３の浅い踏み返しで押え上げ装置駆
動信号を出力し、更に深く踏み返すと糸切り駆動信号と
モータ１２の起動信号を出力する。The pedal 13 is swingable between a horizontal neutral position, a front stepped position in which the front side is depressed with respect to the neutral position, and a step-back position in which the pedal is returned to the heel side with respect to the neutral position. It The operation switch 30 outputs a start signal of the motor 12 when the pedal 13 is stepped on to the front step position, and outputs a start / stop signal by returning to the neutral position. When the pedal 13 is slightly stepped back, the presser foot lifting device drive signal is output, and when the pedal 13 is stepped deeper, the thread trimming drive signal and the start signal of the motor 12 are output.
【００１７】ペダル１３の浅い踏み返しにより、図２で
示すように操作スイッチ３０で浅い踏み返し信号が発生
し、入出力インターフェース３３を通してＣＰＵ３４に
伝達される。ＣＰＵ３４は前記浅い踏み返し信号に基づ
き、押え上げ装置駆動信号を出力する。押え上げ装置駆
動信号は入出力インターフェース３３を通して、駆動回
路３２に伝達され、更に押え上げソレノイド３１に通電
し、押え上げ装置９が駆動される。Due to the shallow depression of the pedal 13, a shallow depression signal is generated by the operation switch 30 as shown in FIG. 2, and is transmitted to the CPU 34 through the input / output interface 33. The CPU 34 outputs a presser foot lifting device drive signal based on the shallow stepping back signal. The presser foot drive signal is transmitted to the drive circuit 32 through the input / output interface 33, and the presser foot solenoid 31 is energized to drive the presser foot lifter 9.
【００１８】本実施例の制御方式（図４参照）では、ペ
ダル１３の浅い踏み返しに同期して、トランジスタを４
０ｍｓ（Ｔ７）間、２００Ｈｚのスイッチング駆動をす
る。この時のソレノイド電流値はｉ３となり、前記の如
く押え棒７を上げだすまでのトルクはない。その後トラ
ンジスタをフルオンし、上昇完了したらまたスイッチン
グ動作に切り換える。ここで糸切り動作を目的としたペ
ダル１３の操作をした際には、４０ｍｓ（Ｔ７）間の遅
延がある場合と同等となり、押え上げ動作が応答してし
まうことはない。更に、押え棒７を上位置にする目的で
ペダル１３を浅い踏み返し位置で保持した際、４０ｍｓ
（Ｔ７）間すでに電流値ｉ３が流れているので、押え棒
７を上げだすトルクの電流値ｉ１へ到達する時間は、零
から流しだすより早く、５０ｍｓ（Ｔ８）で達すること
となり、上位置に上がりきるまでは９０ｍｓ（Ｔ９）と
なり、図７で示した１２０ｍｓ（Ｔ６）よりも早くな
る。次に、制御装置Ｃで行われる押え上げ制御シーケン
スを、図５のフローチャートに基づいて説明する。尚、
図中符号Ｓｉ（ｉ＝１０、１１、１２、・・・・）は各
ステップである。In the control system of this embodiment (see FIG. 4), the transistor 4 is turned on in synchronization with the shallow depression of the pedal 13.
Switching drive of 200 Hz is performed for 0 ms (T7). At this time, the solenoid current value is i3, and there is no torque until the presser bar 7 is lifted as described above. After that, the transistor is fully turned on, and when the rise is completed, the switching operation is switched to again. Here, when the pedal 13 is operated for the purpose of thread cutting operation, it is equivalent to the case where there is a delay of 40 ms (T7), and the presser foot lifting operation does not respond. Furthermore, when the pedal 13 is held in a shallow step-back position for the purpose of moving the presser bar 7 to the upper position,
Since the current value i3 has already flowed during (T7), the time to reach the current value i1 of the torque for raising the presser bar 7 reaches 50 ms (T8) earlier than it starts to flow from zero, and it reaches the upper position. It takes 90 ms (T9) until it reaches the end, which is faster than 120 ms (T6) shown in FIG. Next, the presser foot lifting control sequence performed by the controller C will be described based on the flowchart of FIG. still,
Reference numeral Si (i = 10, 11, 12, ...) In the drawing represents each step.
【００１９】ペダル１３を浅く踏み返すと、操作スイッ
チ３０から浅い踏み返し信号が発生し（Ｓ１０：Ｙｅ
ｓ）、これに同期して４０ｍｓタイマーＴ７を起動（Ｓ
１１）すると同時に、押え上げ駆動用トランジスタ３２
ａにスイッチング出力を供給する（Ｓ１２）、これによ
り、押え上げソレノイドに電流値ｉ３が流れ出すが前記
したように、押え棒７自体はまだ動作しない、次に、タ
イマーＴ７が終了するか（Ｓ１３）、深い踏み返し信号
が発生するか（Ｓ１５）、または、浅い踏み返し信号が
ＯＦＦとなるか（Ｓ１７）をスキャンし、タイマーＴ７
が終了したら（Ｓ１３：Ｙｅｓ）、スイッチング出力か
らフルオン出力に変える（Ｓ１４）。また、深い踏み返
し信号が発生したり（Ｓ１５：Ｙｅｓ）、浅い踏み返し
信号がＯＦＦとなったら（Ｓ１７：Ｎｏ）、押え上げ駆
動出力を停止する（Ｓ１６）。When the pedal 13 is stepped back shallowly, a shallow stepping-back signal is generated from the operation switch 30 (S10: Ye
s), the 40 ms timer T7 is started in synchronization with this (S
11) and at the same time, the presser foot drive transistor 32
The switching output is supplied to a (S12), whereby the current value i3 flows out to the presser foot lifting solenoid, but as described above, the presser bar 7 itself does not operate, and then the timer T7 ends (S13). , A deep tread signal is generated (S15) or a shallow tread signal is turned off (S17), and the timer T7 is scanned.
When is completed (S13: Yes), the switching output is changed to the full-on output (S14). Further, when a deep stepping-back signal is generated (S15: Yes) or a shallow stepping-back signal is turned off (S17: No), the presser foot lifting drive output is stopped (S16).
【００２０】[0020]
【発明の効果】以上説明したことから明かなように、本
発明の押え上げ制御装置によれば、ペダルの踏み返しに
より糸切りをする場合において、押え上げ装置が応答し
てしまうことがなく、押えを上昇させるために、ペダル
を浅い踏み返しの位置のままで保持した際の押えの上昇
遅れを、単に遅延時間をとった場合より短くすることが
できる。As is apparent from the above description, according to the presser foot lifting control device of the present invention, the presser foot lifting device does not respond when thread cutting is performed by stepping back the pedal. In order to raise the presser foot, the lift delay of the presser foot when the pedal is held in the shallow depressing position can be made shorter than when the delay time is simply taken.
【図１】工業用本縫いミシンの斜視図である。FIG. 1 is a perspective view of an industrial lockstitch sewing machine.
【図２】ミシン制御系のブロック図である。FIG. 2 is a block diagram of a sewing machine control system.
【図３】押え上げソレノイドの駆動回路図である。FIG. 3 is a drive circuit diagram of a presser foot lifting solenoid.
【図４】本発明の押え上げ装置の制御タイムチャートで
ある。FIG. 4 is a control time chart of the presser foot lifting device of the present invention.
【図５】本発明の押え上げ装置の制御概略フローチャー
トである。FIG. 5 is a control schematic flowchart of the presser foot lifting device of the present invention.
【図６】従来の、押え上げ装置の制御タイムチャートで
ある。FIG. 6 is a control time chart of a conventional presser foot lifting device.
【図７】従来の、押え上げ装置の制御タイムチャートで
ある。FIG. 7 is a control time chart of a conventional presser foot lifting device.
Ｍ 工業用本縫いミシン ７ 押え棒 ８ 押え足 ９ 押え上げ装置 １３ ペダル ３０ 操作スイッチ ３４ ＣＰＵ Ｃ 制御装置 M Industrial lockstitch sewing machine 7 Presser bar 8 Presser foot 9 Presser lifting device 13 Pedal 30 Operation switch 34 CPU C Control device
Claims (1)
転させ、ペダルを中立位置に戻すことによりミシンを停
止させるとともに、ペダルを浅く踏み返すことにより押
え上げ装置を駆動し、また、ペダルを更に深く踏み返す
ことにより糸切り動作を行うようにした２段踏み返し機
構のペダルを有するミシンの押え制御装置において、 ペダルの浅い踏み返しと同期して第１の一定時間は通常
より低い電圧で押え上げ装置を駆動し、その後の第２の
一定時間は通常電圧で押え上げ装置を駆動する制御装置
を備えたことを特徴とするミシンの押え制御装置。1. A pedal is depressed forward to rotate the sewing machine, the pedal is returned to a neutral position to stop the sewing machine, and the pedal is shallowly returned to drive the presser foot lifting device, and the pedal is further depressed deeply. A presser foot control device for a sewing machine having a pedal with a two-step stepping back mechanism which is configured to perform a thread trimming operation by returning the presser foot, in synchronization with a shallow stepping back of the pedal, for a first constant time at a lower voltage than usual. A presser foot control device for a sewing machine, comprising: a control device that drives the presser foot and drives the presser foot lifter with a normal voltage for a second fixed time thereafter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05009868A JP3077435B2 (en) | 1993-01-25 | 1993-01-25 | Sewing machine presser control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05009868A JP3077435B2 (en) | 1993-01-25 | 1993-01-25 | Sewing machine presser control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06218173A true JPH06218173A (en) | 1994-08-09 |
| JP3077435B2 JP3077435B2 (en) | 2000-08-14 |
Family
ID=11732123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05009868A Expired - Fee Related JP3077435B2 (en) | 1993-01-25 | 1993-01-25 | Sewing machine presser control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3077435B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100437664B1 (en) * | 2002-02-16 | 2004-06-25 | 썬스타 산업봉제기계 주식회사 | Apparatus for controlling solenoid in sewing machine |
| CN104562471A (en) * | 2015-01-06 | 2015-04-29 | 深圳市德业自动化科技有限公司 | Control system of automatic diversified sewing machine |
| CN110438672A (en) * | 2019-08-21 | 2019-11-12 | 浙江美机缝纫机有限公司 | The lift of sewing machine bleeds off pressure foot control device and control method |
-
1993
- 1993-01-25 JP JP05009868A patent/JP3077435B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100437664B1 (en) * | 2002-02-16 | 2004-06-25 | 썬스타 산업봉제기계 주식회사 | Apparatus for controlling solenoid in sewing machine |
| CN104562471A (en) * | 2015-01-06 | 2015-04-29 | 深圳市德业自动化科技有限公司 | Control system of automatic diversified sewing machine |
| CN110438672A (en) * | 2019-08-21 | 2019-11-12 | 浙江美机缝纫机有限公司 | The lift of sewing machine bleeds off pressure foot control device and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3077435B2 (en) | 2000-08-14 |
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