JPS6140294Y2 - - Google Patents
Info
- Publication number
- JPS6140294Y2 JPS6140294Y2 JP1984063309U JP6330984U JPS6140294Y2 JP S6140294 Y2 JPS6140294 Y2 JP S6140294Y2 JP 1984063309 U JP1984063309 U JP 1984063309U JP 6330984 U JP6330984 U JP 6330984U JP S6140294 Y2 JPS6140294 Y2 JP S6140294Y2
- Authority
- JP
- Japan
- Prior art keywords
- upper thread
- amount
- fabric
- thread
- detection roller
- 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
- 239000004744 fabric Substances 0.000 claims description 27
- 238000006073 displacement reaction Methods 0.000 claims description 19
- 238000009958 sewing Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案はミシンの上糸供給装置に係り、特に
上糸テンシヨンを常に正しく維持し得る上糸供給
装置に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a needle thread supply device for a sewing machine, and more particularly to a needle thread supply device that can always maintain correct needle thread tension.
（従来技術の説明とその問題点）
従来のミシンにおける縫製機構について、特に
ロツクステツチの機構を例示して説明する。この
機構は、上糸と下糸とにそれぞれ調節可能な摩擦
抵抗を加えることにより、各糸に適切なテンシヨ
ンを与え、その釣合によつて上下糸の絡み合い点
を調整するようにしたものであり、この場合上糸
テンシヨンが弱いと上糸は下糸のテンシヨンに負
けて布の下側に飛び出した状態で絡み合い、また
上糸テンシヨンが強いと上述とは逆の現象とな
る。(Description of Prior Art and its Problems) The sewing mechanism of a conventional sewing machine will be described, particularly by exemplifying the lock stitch mechanism. This mechanism applies adjustable frictional resistance to the upper and lower threads to give appropriate tension to each thread, and adjusts the entanglement point of the upper and lower threads by adjusting the balance. In this case, if the upper thread tension is weak, the upper thread will be overcome by the lower thread tension and become entangled with the fabric in a state where it protrudes to the underside of the fabric.If the upper thread tension is strong, the opposite phenomenon will occur.
それに糸の材質、太きさによつて微妙な調整が
必要となると共に、布の種類、厚さによつてもそ
の都度テンシヨンを調整しなおさなければならな
い等これらの調整作業は非常に煩わしいものであ
り、ミシンを扱う者にとつて大きな障害となつて
いた。しかし最近では、例えば特公昭57−20835
号公報にみられるように、ステツチ形成機構の１
ストローク毎の変位に対応した必要上糸量を順次
繰り出すミシンの上糸供給装置等が提案されてお
り、このような自動糸テンシヨン装置の開発が活
発になつてきている。 In addition, delicate adjustments are required depending on the material and thickness of the thread, and the tension must be readjusted each time depending on the type and thickness of the fabric, making these adjustment tasks extremely troublesome. This has been a major obstacle for those who use sewing machines. However, recently, for example,
As seen in the publication, one of the stitch forming mechanisms
Needle thread supply devices for sewing machines that sequentially pay out the necessary amount of needle thread corresponding to the displacement of each stroke have been proposed, and development of such automatic thread tension devices is becoming more active.
しかしながら上記の上糸供給装置では、実布の
移動量の検出手段として、実布を固定する送り歯
の移動量を基準としているので、実際上はこの送
り歯と実布との間にスベリが生じ、そのため15％
〜20％の誤差が生じているのが実状である。この
誤差は、ミシンの運転速度を速めれば益々大きい
ものとなり、したがつてかかる装置では適切な上
糸テンシヨンを得ることが出来ないうえに、構造
も複雑である等の問題があり、簡易な構造でしか
も良好なる糸テンシヨンを達成する上糸供給装置
が望まれていた。 However, in the needle thread supply device described above, the movement amount of the feed dog that fixes the real fabric is used as a reference for detecting the amount of movement of the real fabric, so in reality, there is no slippage between this feed dog and the real fabric. arising and therefore 15%
The reality is that there is an error of ~20%. This error becomes larger as the operating speed of the sewing machine is increased, and there are problems such as the inability to obtain an appropriate upper thread tension with such a device and the complicated structure. There has been a need for a needle thread supply device that is structurally capable of achieving good thread tension.
（考案の目的）
この考案は、上述の事情に鑑みてなされたもの
で、その目的とするところは、実布の移動量変位
並びに布厚変位を正確にしかも簡単に検知し、そ
れらの変位に基づいて正確な上糸供給量を算出し
て、上糸繰り出し装置から所要量の上糸を供給
し、理想的な糸テンシヨンを与えることを可能に
したミシンの上糸供給装置を提供することにあ
る。(Purpose of the invention) This invention was made in view of the above-mentioned circumstances, and its purpose is to accurately and easily detect the movement amount displacement and cloth thickness displacement of the real fabric, and to To provide a needle thread supply device for a sewing machine that can calculate an accurate needle thread supply amount based on the above-mentioned specifications, supply the required amount of needle thread from a needle thread pay-out device, and provide an ideal thread tension. be.
（考案の構成）
この考案は、上糸繰り出し装置を駆動する駆動
装置と、駆動装置の駆動を制御する制御装置とを
有するミシンにおいて、前記制御装置として、上
下動自在の検知ローラーが設けられ、該検知ロー
ラーの回動変位により、実布の送り量変位を検出
し、該検知ローラーの上下動変位により、実布の
布厚変位を検出すると共に、前記駆動装置の作動
に伴つて、上記実布の送り量変位並びに布厚変位
に対応する上糸必要量だけを供給し得る上糸繰り
出し装置を備えたことを特徴とするミシンの上糸
供給装置である。(Structure of the invention) This invention provides a sewing machine having a drive device that drives an upper thread unwinding device and a control device that controls the drive of the drive device, in which a detection roller that can freely move up and down is provided as the control device, The rotational displacement of the detection roller detects the feed amount displacement of the actual fabric, and the vertical displacement of the detection roller detects the thickness displacement of the actual fabric. A needle thread supply device for a sewing machine is characterized in that it is equipped with a needle thread pay-out device capable of supplying only the necessary amount of needle thread corresponding to changes in the feed amount and thickness of the fabric.
（考案の実施例の説明）
以下、この考案の一実施例を図面に従つて説明
する。第１図は検知ローラーを示す斜視図であ
り、この検知ローラーは上糸繰り出し装置を制御
する制御装置の一部を構成する。図面において、
検知ローラー１は針棒５の付近に設けられ、スプ
リング３により、実布７に対して常に押圧状態で
接触している。したがつて図示しない実布送り装
置により実布７が矢印方向に送られた時、この検
知ローラー１の回動変位量が後述する制御部に入
力される。同様に、実布の布厚変化においても、
上記検知ローラー１の上下動変位量が制御部に入
力される。尚、符号２は検知ローラー１の支持ロ
ツドであり、符号４はミシン針、符号６は上糸を
示している。(Description of an embodiment of the invention) An embodiment of the invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a detection roller, which constitutes a part of a control device that controls an upper thread payout device. In the drawing,
The detection roller 1 is provided near the needle bar 5, and is always in contact with the actual cloth 7 in a pressed state by a spring 3. Therefore, when the real cloth 7 is fed in the direction of the arrow by the real cloth feeding device (not shown), the amount of rotational displacement of the detection roller 1 is inputted to a control section to be described later. Similarly, when changing the thickness of actual cloth,
The amount of vertical displacement of the detection roller 1 is input to the control section. The reference numeral 2 indicates a support rod for the detection roller 1, the reference numeral 4 indicates a sewing machine needle, and the reference numeral 6 indicates an upper thread.
次に、本考案による上糸供給装置の一実施例を
第２図にて示す。図面において、上糸ボビン（図
示せず）よりの上糸６はテンシヨン装置８を介し
て、プーリー９に巻き付けられる。このプーリー
９は上糸繰り出し装置であり、駆動装置１４の作
動と同期し、更に前述の検知ローラー１で検出し
た変位に基づき、所定量の上糸だけしか繰り出さ
ないようにその回転が制御されている。 Next, an embodiment of the needle thread supplying device according to the present invention is shown in FIG. In the drawing, an upper thread 6 from an upper thread bobbin (not shown) is wound around a pulley 9 via a tension device 8. This pulley 9 is a needle thread pay-out device, and its rotation is controlled in synchronization with the operation of the drive device 14 and based on the displacement detected by the aforementioned detection roller 1 so that only a predetermined amount of the needle thread is paid out. There is.
このプーリー９から繰り出される上糸６は、バ
ネ１０、ガイド１１，１２、更に天秤１３を経
て、針４に導かれるが、上述したようにプーリー
９の回転により適切なテンシヨンが付与されてい
る。 The needle thread 6 let out from the pulley 9 is guided to the needle 4 via the spring 10, the guides 11, 12, and the thread take-up 13, and is given appropriate tension by the rotation of the pulley 9 as described above.
尚、駆動装置１４としては直流モーターが用い
られ、このモーターの回動を図示しないクランク
手段により、針棒５の上下往復運動に変換してい
る。 A DC motor is used as the drive device 14, and the rotation of the motor is converted into vertical reciprocating motion of the needle bar 5 by a crank means (not shown).
第３図は、本考案の制御装置の作用をブロツク
図として現わしたもので、検知ローラー１の回動
変位量により、実布７の送り量を検出すると共
に、検知ローラー１の上下変動を利用して、実布
７の布厚を検出し、これらの検出値と、ミシン縫
速度とをコンピユーターにメモリーし、それによ
り上糸繰り出し量を算出し、上糸繰り出し装置で
あるプーリー９の回転を制御するというもので、
以上により、上糸６の必要量だけが供給される
ので、常に適切なテンシヨンが上糸に付与される
ことになる。 FIG. 3 is a block diagram showing the operation of the control device of the present invention, in which the amount of rotational displacement of the detection roller 1 is used to detect the amount of feed of the actual fabric 7, and the vertical fluctuation of the detection roller 1 is detected. This is used to detect the thickness of the actual fabric 7, store these detected values and the sewing speed in the computer, calculate the amount of needle thread payout, and control the rotation of the pulley 9, which is the needle thread payout device. As described above, only the necessary amount of the upper thread 6 is supplied, so that an appropriate tension is always applied to the upper thread.
（考案の効果）
以上詳述したように、本考案によれば、検知ロ
ーラーの回動変位により、実布の送り量変位を検
出し、また検知ローラーの上下動変位により、実
布の布厚変位を検出し、これらの変位に基づいて
上糸供給量を算出し、上糸の必要量だけを繰り出
すというものであり、実布の送り量変位並びに布
厚変位を正確に検出することができるので理想的
な上糸テンシヨンが確保でき、縫製加工の能率を
大巾に向上させると共に、構造的にも簡単で廉価
である等経済的価値も大きいものである。(Effects of the invention) As described in detail above, according to the invention, the feed amount displacement of the actual fabric is detected by the rotational displacement of the detection roller, and the cloth thickness of the actual fabric is detected by the vertical displacement of the detection roller. The system detects the displacement, calculates the amount of needle thread supplied based on these displacements, and pays out only the necessary amount of needle thread, making it possible to accurately detect the displacement of the feed amount and fabric thickness of the actual fabric. Therefore, an ideal needle thread tension can be secured, greatly improving the efficiency of sewing processing, and the structure is simple and inexpensive, so it has great economic value.
図面は本考案によるミシンの上糸供給装置の一
実施例を示すもので、第１図は、実布の送り量、
布厚を検出する検知ローラーを示す斜視図。第２
図は上糸供給装置を示す説明図。第３図は本考案
装置の作動を示すブロツク図である。
１……検知ローラー、６……上糸、７……実
布、９……プーリー、１４……駆動装置。
The drawings show an embodiment of the needle thread feeding device of the sewing machine according to the present invention.
FIG. 3 is a perspective view showing a detection roller that detects cloth thickness. Second
The figure is an explanatory diagram showing an upper thread supply device. FIG. 3 is a block diagram showing the operation of the device of the present invention. DESCRIPTION OF SYMBOLS 1...Detection roller, 6...Upper thread, 7...Real cloth, 9...Pulley, 14...Drive device.
Claims (1)
に必要とする上糸量を上糸供給源から繰り出して
供給し得る上糸繰り出し装置を備えたミシンにお
いて、検知ローラーを上下動及び回動自在に針板
の針落ち孔を通る布送り線上に設け、この回動変
位により被縫物の送り量を検出し、上下動変位に
より被縫物の布厚を検出するようにしたことを特
徴とするミシンの上糸供給装置。 In a sewing machine equipped with an upper thread feeding device capable of feeding an amount of upper thread necessary for forming one stitch corresponding to the feed rate and fabric thickness of the workpiece and feeding it from an upper thread supply source, the detection roller is moved vertically and It is rotatably installed on the fabric feed line that passes through the needle drop hole of the throat plate, and the feed amount of the sewing material is detected by this rotational displacement, and the fabric thickness of the sewing material is detected by the vertical displacement. An upper thread supply device for a sewing machine featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6330984U JPS60176784U (en) | 1984-04-28 | 1984-04-28 | Sewing machine needle thread supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6330984U JPS60176784U (en) | 1984-04-28 | 1984-04-28 | Sewing machine needle thread supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60176784U JPS60176784U (en) | 1985-11-22 |
| JPS6140294Y2 true JPS6140294Y2 (en) | 1986-11-18 |
Family
ID=30593327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6330984U Granted JPS60176784U (en) | 1984-04-28 | 1984-04-28 | Sewing machine needle thread supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60176784U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2620442B2 (en) * | 1991-09-21 | 1997-06-11 | ジューキ 株式会社 | Needle thread supply device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5342963A (en) * | 1976-09-28 | 1978-04-18 | Tokyo Juki Industrial Co Ltd | Yarn tension controller for sewing machine |
| JPS56106691A (en) * | 1980-01-30 | 1981-08-25 | Brother Ind Ltd | Automatic cotton toning device for sewing machine |
| JPS57170289A (en) * | 1981-04-14 | 1982-10-20 | Tokyo Juki Industrial Co Ltd | Continuous feeder for upper cotton of sewing machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6018223Y2 (en) * | 1982-09-29 | 1985-06-03 | 蛇の目ミシン工業株式会社 | Automatic upper thread tension device for sewing machine |
-
1984
- 1984-04-28 JP JP6330984U patent/JPS60176784U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5342963A (en) * | 1976-09-28 | 1978-04-18 | Tokyo Juki Industrial Co Ltd | Yarn tension controller for sewing machine |
| JPS56106691A (en) * | 1980-01-30 | 1981-08-25 | Brother Ind Ltd | Automatic cotton toning device for sewing machine |
| JPS57170289A (en) * | 1981-04-14 | 1982-10-20 | Tokyo Juki Industrial Co Ltd | Continuous feeder for upper cotton of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60176784U (en) | 1985-11-22 |
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