JPH0577439B2 - - Google Patents
Info
- Publication number
- JPH0577439B2 JPH0577439B2 JP15811284A JP15811284A JPH0577439B2 JP H0577439 B2 JPH0577439 B2 JP H0577439B2 JP 15811284 A JP15811284 A JP 15811284A JP 15811284 A JP15811284 A JP 15811284A JP H0577439 B2 JPH0577439 B2 JP H0577439B2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- amount adjusting
- adjusting member
- sewing
- 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.)
- Expired - Lifetime
Links
- 238000009958 sewing Methods 0.000 claims description 28
- 230000003213 activating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はミシンの上糸量調節装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a needle thread amount adjusting device for a sewing machine.
［従来技術］
従来この種の装置としては、縫目糸が担持され
た天秤をサーボモータで上下動させ、その上下動
を予め指令させた縫い条件に従つて制御し、その
ストロークを変化させ、縫目糸の供給量を変化さ
せるものがあつた。[Prior Art] Conventionally, this type of device uses a servo motor to move a thread take-up lever up and down, and controls the up and down movement according to pre-commanded sewing conditions to change its stroke. There was one that changed the amount of stitching thread supplied.
［発明が解決しようとする問題点］
この装置においては、天秤を直接サーボモータ
で上下動させているために、きめ細かな天秤のス
トロークの調節ができる反面、このサーボモータ
には大きなトルクが必要であり、サーボモータが
大型化すると共に、ミシンの高速化への対応が困
難であつた。[Problems to be solved by the invention] In this device, since the balance is moved up and down directly by a servo motor, the stroke of the balance can be finely adjusted, but on the other hand, this servo motor requires a large torque. However, as the servo motor became larger, it was difficult to adapt to higher speed sewing machines.
［発明の目的］
本発明は従来の欠点を解消するためになされた
ものであり、その目的は小型の駆動手段を使用で
き、しかもミシンの高速化に対応でき、縫製条件
によつて上糸供給量が自動的に設定されるミシン
の上糸量調節装置を提供することにある。[Object of the Invention] The present invention was made in order to eliminate the drawbacks of the conventional technology.The purpose of the present invention is to use a small drive means, to be able to cope with higher speed sewing machines, and to adjust the upper thread supply depending on the sewing conditions. To provide a needle thread amount adjusting device for a sewing machine in which the amount is automatically set.
［問題点を解決するための手段］
本発明は、ミシンの主軸と機械的に連結されて
機枠に対して上下動される天秤と、その天秤の上
昇により緊張された上糸に係合し、その経路を変
化させるために前記機枠に対し変位可能な糸量調
節部材と、その糸量調節部材を変位させる駆動手
段と、縫製条件を指令する入力手段と、その入力
手段によつて指令された縫製条件に基づいて前記
駆動手段を介して糸量調節部材を変位させる設定
手段とより構成されている。[Means for Solving the Problems] The present invention includes a take-up lever that is mechanically connected to the main shaft of a sewing machine and moves up and down with respect to the machine frame, and an upper thread that is tensioned by the rise of the take-up. , a thread amount adjusting member displaceable relative to the machine frame in order to change the route; a driving means for displacing the thread amount adjusting member; an input means for commanding sewing conditions; and a setting means for displacing the thread amount adjusting member via the driving means based on the sewing conditions determined.
［作用］
本発明においては、主軸により高速駆動される
天秤に担持された上糸が天秤の上昇により緊張さ
れた時、その上糸に糸量調節部材が係合する。糸
量調節部材は駆動手段によつて変位されて上糸の
経路を変化させ、上糸供給量を変化させる。ま
た、設定手段は入力手段によつて指令された縫製
条件に基づいて駆動手段を介して糸量調節部材を
変位させ、最適な上糸供給量を設定する。[Operation] In the present invention, when the upper thread carried on the take-up thread driven at high speed by the main shaft is tensioned by the rise of the thread take-up, the thread amount adjusting member engages with the upper thread. The thread amount adjusting member is displaced by the drive means to change the path of the upper thread, thereby changing the upper thread supply amount. Further, the setting means displaces the thread amount adjusting member via the driving means based on the sewing conditions commanded by the input means, and sets an optimum upper thread supply amount.
［実施例］
以下に本発明を具体化した一実施例を示す図面
を参照してその詳細を説明する。[Example] The details of an embodiment of the present invention will be described below with reference to the drawings.
図においてミシンの機枠１には主軸（図示せ
ず）に連結され、機枠１に形成された溝１９にお
いて公知の揺動運動をする天秤２が支持されてお
り、その天秤２はストロークが一定であると共
に、その天秤２の先端には、それぞれ上糸３の挿
通孔２１が形成された二股部２２が形成されてい
る。 In the figure, a thread take-up 2 is connected to a main shaft (not shown) on a machine frame 1 of the sewing machine, and is supported in a groove 19 formed in the machine frame 1 to make a known swinging motion.The thread take-up 2 has a stroke. At the tip of the thread take-up lever 2, a bifurcated part 22 is formed, in which a through hole 21 for the needle thread 3 is formed.
前記機枠１には糸量調節部材４が前記主軸と平
行な軸５により回動可能に支持されており、その
自由端４１は機枠１の溝１９から突出して前記天
秤２の二股部２２中に位置する。この糸量調節部
材４の自由端４１には上糸係合面４２が形成され
ており、その上糸係合面４２は前記天秤２の上昇
時に二股部２２に挿通された上糸３に係合してこ
れを屈曲させる。 A thread amount adjusting member 4 is rotatably supported on the machine frame 1 by a shaft 5 parallel to the main shaft, and its free end 41 protrudes from the groove 19 of the machine frame 1 and connects to the bifurcated portion 22 of the thread take-up 2. located inside. An upper thread engaging surface 42 is formed on the free end 41 of the thread amount adjusting member 4, and the upper thread engaging surface 42 engages the upper thread 3 inserted into the forked portion 22 when the thread take-up lever 2 is raised. and bend it.
前記機枠１の上部には立垂部１１が突出形成さ
れており、その立垂部１１の前記糸量調節部材４
側には、駆動手段としてのパルスモータ６がねじ
７により固定されている。このパルスモータ６の
駆動軸６１は前記主軸と平行に前記糸量調節部材
４の方向へ延びており、前記糸量調節部材４と隣
接して係合部材８がねじ１２により固定されてい
る。 A vertical hanging portion 11 is formed protruding from the upper part of the machine frame 1, and the yarn amount adjusting member 4 of the vertical hanging portion 11
A pulse motor 6 as a driving means is fixed to the side with a screw 7. A drive shaft 61 of the pulse motor 6 extends parallel to the main shaft in the direction of the yarn amount adjusting member 4 , and an engaging member 8 is fixed adjacent to the yarn amount adjusting member 4 with a screw 12 .
この係合部材８は前記駆動軸６１の半径方向に
延びる係合溝８１が形成されており、前記駆動軸
６１と一体に回動可能である。 This engaging member 8 is formed with an engaging groove 81 extending in the radial direction of the drive shaft 61, and is rotatable together with the drive shaft 61.
ここで、前記糸量調節部材４には前記係合部材
８側に突出するように係合ピン９が突設されてお
り、この係合ピン９は前記係合部材８の係合溝８
１に係合している。従つて、前記パルスモータ６
の作動により回動される前記係合部材８と連動し
て前記糸量調節部材４は回動される。 Here, an engagement pin 9 is provided on the thread amount adjusting member 4 so as to protrude toward the engagement member 8 side, and this engagement pin 9 is inserted into the engagement groove 8 of the engagement member 8.
1 is engaged. Therefore, the pulse motor 6
The thread amount adjusting member 4 is rotated in conjunction with the engaging member 8, which is rotated by the operation of the thread amount adjusting member 4.
前記機枠１には糸案内１５，１６，１７がそれ
ぞれ取付けられており、この糸案内１５，１６，
１７により上糸３は上糸供給源（図示せず）から
前記天秤２を経て上下動される針１８に案内され
る。 Thread guides 15, 16, and 17 are attached to the machine frame 1, respectively.
17 guides the needle thread 3 from a needle thread supply source (not shown) through the thread take-up 2 to a needle 18 which is moved up and down.
前記機枠１には入力手段としての入力スイツチ
１３が設置されており、この入力スイツチ１３は
縫製条件毎に選択されて操作される。 An input switch 13 as an input means is installed in the machine frame 1, and this input switch 13 is selected and operated for each sewing condition.
前記機枠１内にはデジタル演算回路で構成され
た設定手段としてのコントローラ１４が設置され
ており、その入力端子には前記入力スイツチ１３
がそれぞれ接続され、出力端子にはパルスモータ
駆動回路（図示せず）を介して前記パルスモータ
６が接続されている。 A controller 14 as a setting means composed of a digital arithmetic circuit is installed in the machine frame 1, and the input switch 13 is connected to the input terminal of the controller 14 as a setting means.
are connected to each other, and the pulse motor 6 is connected to the output terminal via a pulse motor drive circuit (not shown).
このコントローラ１４は、縫目ピツチの大小、
糸の伸縮性の大小、上糸の張力の大小等、各縫製
条件毎に最適な上糸供給量となる前記糸量調節部
材４の上糸係合面４２の上死点における天秤２に
対する位置を示す前記パルスモータ６の駆動軸６
１の回転位置データがそれぞれ記憶された読出し
専用メモリ（図示せず）を有している。更に、前
記コントローラ１４はその作動により前記入力ス
イツチ１３の状態を検出して、指令された縫製条
件に対応する回転位置データを前記読出専用メモ
リから読出し、このデータに基づいて前記パルス
モータ６を駆動するように構成されている。 This controller 14 controls the size of the stitch pitch,
The position of the needle thread engaging surface 42 of the thread amount adjusting member 4 relative to the thread take-up lever 2 at the top dead center, which provides the optimum needle thread supply amount for each sewing condition such as the elasticity of the thread and the tension of the needle thread. The drive shaft 6 of the pulse motor 6 shown in FIG.
It has a read-only memory (not shown) in which one rotational position data is stored. Furthermore, the controller 14 detects the state of the input switch 13 through its operation, reads rotational position data corresponding to the commanded sewing conditions from the read-only memory, and drives the pulse motor 6 based on this data. is configured to do so.
次にその作用を説明する。 Next, its effect will be explained.
使用者は、糸量調節部材４を手により第２図に
おける反時計方向に回動させて溝１９の側壁に係
合させ、その上糸係合面４２を上死点における天
秤２よりも上方に位置させる。この状態において
使用者は、上糸３を糸案内１５に通した後、天秤
２のそれぞれの挿通孔２１に通し、糸案内１５，
１６，１７を通して針１８にこの上糸３を担持さ
せる。 The user rotates the thread amount adjusting member 4 by hand in the counterclockwise direction in FIG. to be located. In this state, the user passes the upper thread 3 through the thread guide 15, and then passes it through each insertion hole 21 of the thread take-up thread 2,
The upper thread 3 is carried by the needle 18 through threads 16 and 17.
次に使用者は実際に縫製作業を行なう場合の縫
製条件に従つて、入力スイツチ１３を操作した後
に電源を投入する。これによりコントローラ１４
が作動して入力スイツチ１３の状態を検出し、指
令された縫製条件に対応する回転位置データを読
出専用メモリから読出し、このデータに基づいて
前記パルスモータ６を駆動して糸量調節部材４を
回動させる。一方、天秤２は主軸が回転されるこ
とによつて揺動され、その上昇により天秤２の二
股部２２に担持された上糸３は糸量調節部材４の
上糸係合面４２に係合して屈曲される。前述の通
り糸量調節部材４が最適の位置にあるので適切な
上糸が供給され、良好な縫目が形成される。 Next, the user turns on the power after operating the input switch 13 in accordance with the sewing conditions for actually performing sewing work. As a result, the controller 14
is activated, detects the state of the input switch 13, reads rotational position data corresponding to the commanded sewing conditions from the read-only memory, and drives the pulse motor 6 based on this data to adjust the thread amount adjusting member 4. Rotate. On the other hand, the thread take-up 2 is swung by the rotation of the main shaft, and as it rises, the needle thread 3 carried by the bifurcated portion 22 of the thread take-up 2 engages with the needle thread engaging surface 42 of the thread amount adjusting member 4. and then bent. As described above, since the thread amount adjusting member 4 is in the optimal position, an appropriate needle thread is supplied and a good stitch is formed.
尚、本発明は前述の実施例にのみ限定されるも
のではなく、縫製条件を指令する入力手段として
は、可変抵抗等によりアナログ値を指令する方式
であつてもよい。また、駆動手段もパルスモータ
に限らず、デジタル信号をアナログ信号に変換し
てサーボモータ等で糸量調節部材を変位させても
よい。 Note that the present invention is not limited to the above-described embodiments, and the input means for commanding sewing conditions may be of a type that commands analog values using a variable resistor or the like. Further, the driving means is not limited to a pulse motor, and a digital signal may be converted into an analog signal and a servo motor or the like may be used to displace the yarn amount adjusting member.
［効果］
本発明は、主軸により機械的に上下動される天
秤と、主軸とは別個の駆動手段により変位される
糸量調節部材とを設け、しかもその駆動手段を入
力手段によつて指令された縫製条件に基づいて作
動させているので、天秤と糸量調節部材との協働
により常に上糸供給量をその縫製条件に適したも
のに設定できる。また、駆動手段は糸量調節部材
のみを変位させるだけなので、小型化が可能であ
る。又更に天秤が通常のミシンと同様に主軸によ
り上下動されるもので前記糸量調節部材の設置が
縫製条件に悪影響を及ぼすことがなくミシンを高
速で駆動することができる。[Effects] The present invention includes a thread take-up lever that is mechanically moved up and down by a main shaft, and a yarn amount adjusting member that is displaced by a drive means separate from the main shaft, and furthermore, the drive means can be commanded by an input means. Since the sewing machine is operated based on the sewing conditions, the needle thread supply amount can always be set to a value suitable for the sewing conditions through cooperation between the thread take-up and the thread amount adjusting member. Further, since the driving means only displaces the yarn amount adjusting member, it is possible to reduce the size. Furthermore, since the thread take-up lever is moved up and down by the main shaft like a normal sewing machine, the installation of the thread amount adjusting member does not adversely affect sewing conditions, and the sewing machine can be driven at high speed.
第１図は本発明を具体化した一実施例を示す正
面図、第２図はそのＡ−Ａ線断面図、第３図はブ
ロツク図である。
２は天秤、３は上糸、４は糸量調節部材、６は
パルスモータ、１３は入力スイツチ、１４はコン
トローラである。
FIG. 1 is a front view showing an embodiment embodying the present invention, FIG. 2 is a sectional view taken along the line A--A, and FIG. 3 is a block diagram. 2 is a thread take-up, 3 is an upper thread, 4 is a thread amount adjusting member, 6 is a pulse motor, 13 is an input switch, and 14 is a controller.
Claims (1)
ミシンの主軸と機械的に連結されて上下動される
天秤と、 前記機枠に対し変位可能に設置され、前記天秤
の上昇により緊張された上糸に係合し、その経路
を変化させることにより上糸供給量を変化させる
糸量調節部材と、 その糸量調節部材を変位させるために作動する
駆動手段と、 縫製条件を指令する入力手段と、 その入力手段によつて指令された縫製条件に基
づいて前記駆動手段を作動させて前記糸量調節部
材を変位させ、上糸供給量をその縫製条件に適し
たものに設定する設定手段とより構成されている
ことを特徴とするミシンの上糸量調節装置。[Scope of Claims] 1. A take-up lever that is supported so as to be movable up and down relative to the machine frame and is mechanically connected to the main shaft of the sewing machine so as to move up and down; a thread amount adjusting member that engages with the upper thread tensioned by the rise of the upper thread and changes the path of the upper thread, thereby changing the amount of upper thread supplied; a driving means that operates to displace the thread amount adjusting member; an input means for commanding conditions; and a needle thread supply amount suitable for the sewing conditions by activating the driving means to displace the thread amount adjusting member based on the sewing conditions commanded by the input means. 1. A needle thread amount adjusting device for a sewing machine, comprising: a setting means for setting the needle thread amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15811284A JPS6137192A (en) | 1984-07-27 | 1984-07-27 | Needle thread amount controller of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15811284A JPS6137192A (en) | 1984-07-27 | 1984-07-27 | Needle thread amount controller of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6137192A JPS6137192A (en) | 1986-02-22 |
| JPH0577439B2 true JPH0577439B2 (en) | 1993-10-26 |
Family
ID=15664562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15811284A Granted JPS6137192A (en) | 1984-07-27 | 1984-07-27 | Needle thread amount controller of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6137192A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63234995A (en) * | 1987-03-23 | 1988-09-30 | ブラザー工業株式会社 | Automatic thread tensible lock stitch sewing machine |
-
1984
- 1984-07-27 JP JP15811284A patent/JPS6137192A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6137192A (en) | 1986-02-22 |
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