JPS61181488A - Sewing machine - Google Patents
Sewing machineInfo
- Publication number
- JPS61181488A JPS61181488A JP2303685A JP2303685A JPS61181488A JP S61181488 A JPS61181488 A JP S61181488A JP 2303685 A JP2303685 A JP 2303685A JP 2303685 A JP2303685 A JP 2303685A JP S61181488 A JPS61181488 A JP S61181488A
- Authority
- JP
- Japan
- Prior art keywords
- looper
- thread
- sewing machine
- cam member
- 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.)
- Pending
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、針糸をもつ針と、ルーパ糸をもつルーパと
の協動作業により縫成を行なうミシン、詳しくはそのル
ーパ糸の調子を調整する構造に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sewing machine that performs sewing through the cooperative work of a needle with a needle thread and a looper with a looper thread, and more specifically, to Regarding the structure to be adjusted.
針糸をもつ針と、ルーパ糸をもつルーパとの協動作用に
より縫成を行なうミシンにおいて、良好な縫目を形成す
る条件として、ルーパの運動に対応するルーパ糸の弛み
吸収と糸の供給の効果的なタイミングが不可欠である。In a sewing machine that performs sewing by the cooperation of a needle with needle thread and a looper with looper thread, the conditions for forming good stitches are to absorb the slack in the looper thread and to supply the thread in response to the movement of the looper. Effective timing is essential.
このため、従来のミシン、例えばオーバロックミシンに
おいては、第６図に示すように、ミシンフレーム１の適
宜個所に固定ガイド片２を取付けるとともに、上ルーパ
３の揺動杆４に可動ガイド片５を取付け、両ガイド片２
，５及び下ルーパ６に設けたガイド７・・・に糸調子器
８，８からの糸λを通して両ルーパ３，６の糸孔に導び
き、鎖線で示すように可動ガイド片５の動きによって上
記糸ａの弛み吸収及び糸供給などの糸ａの調子調整を行
なっている。For this reason, in a conventional sewing machine, for example, an overlock sewing machine, as shown in FIG. Attach both guide pieces 2
, 5 and the guide 7 provided on the lower looper 6, the thread λ from the thread tension devices 8, 8 is guided to the thread holes of both the loopers 3, 6, and the movement of the movable guide piece 5 as shown by the chain line The tension of the thread a is adjusted, such as absorbing slack in the thread a and supplying the thread.
よってルーパ３，６に対し好ましいタイミングで糸を供
給し弛みを吸収するという両刀の作用をガイド片５の形
状及びガイド７の取付位置の設定だけで得ることは非常
にむずかしい。このため、従来では、糸の供給作用に重
点をおき、縫目の乱れの誘発を防ぐ光吸収のタイミング
を無視して設定しているのが実状である。Therefore, it is very difficult to obtain the double-edged action of supplying yarn to the loopers 3 and 6 at a preferable timing and absorbing slack by simply setting the shape of the guide piece 5 and the mounting position of the guide 7. For this reason, in the past, the actual situation is that emphasis is placed on the thread supply function and the timing of light absorption, which prevents the occurrence of stitch disturbances, is ignored.
ならず、ガイド片５は手の触れ得る所で揺動することと
なり、非常に危険であるうえに、布などがガイド片５に
からむなどの問題がある。Otherwise, the guide piece 5 will swing in a place that can be touched by hand, which is very dangerous, and there are also problems such as cloth or the like getting tangled with the guide piece 5.
この発明は、以上の点に留意し、ミシンフレームの固定
位置で回転するカム部材によって上記糸ａの調子調整を
行ない、ルーパの動きに対応したタイミングによって弛
み吸収、糸供給を行なうことを目的とする。With the above points in mind, the present invention aims to adjust the tension of the thread a using a cam member that rotates at a fixed position on the sewing machine frame, and to absorb slack and supply the thread at a timing corresponding to the movement of the looper. do.
上記目的を達成するため、この発明においては、針糸を
もつ針と、ルーパ糸をもつルーパとの協動作用により縫
成を行なうミシンにおいて、主軸と連動して回転するカ
ム部材をミシンフレームに設け、糸調子器からルーパへ
のルーパ糸を、前記カム部材の外周変位面に接しさせて
迂回させ、その外周変位面を、前記ルーパ糸の径路を長
短させてその長さがルーパの動きに対応するようにカム
部材の回転につれてルーパ糸との接触部か回転中心に対
し変位する形状としたものである。In order to achieve the above object, the present invention provides a sewing machine in which a cam member that rotates in conjunction with the main shaft is attached to the sewing machine frame in a sewing machine that performs sewing by the cooperation of a needle with needle thread and a looper with looper thread. The looper thread from the thread tension device to the looper is detoured in contact with the outer circumferential displacement surface of the cam member, and the outer circumferential displacement surface is used to lengthen or shorten the path of the looper yarn so that the length thereof corresponds to the movement of the looper. Correspondingly, as the cam member rotates, the contact portion with the looper thread is shaped to be displaced relative to the center of rotation.
この様に構成し、ルーパの動きにしたがってカム部材も
回転し、その回転によって糸の接触部が回転中心から変
位して糸径路が長くなったり、短かくなってルーパの動
きに対応したタイミングでもって糸の弛み吸収、糸供給
が行なわれ、良好な縫目を得ることができる。With this structure, the cam member also rotates as the looper moves, and this rotation displaces the thread contact part from the center of rotation, making the thread path longer or shorter, at a timing that corresponds to the movement of the looper. As a result, thread slack is absorbed and thread is supplied, and good stitches can be obtained.
以下、この発明の実施例を添付図面に基づいて説明する
。Embodiments of the present invention will be described below with reference to the accompanying drawings.
この実施例は、オーバロックミシンに関するものであり
、第１図に示すように、針糸をもつ針１６と上下ルーパ
３，６との協動作用により縁かがり縫いを行なう。この
縫い構造及び作用は従来公知のものと同様であり、この
発明は、第３図に示すように、ルーパ糸λの調子の調整
構造を改良したものである。This embodiment relates to an overlock sewing machine, and as shown in FIG. 1, an overlock stitch is performed by the cooperative operation of a needle 16 having needle thread and upper and lower loopers 3, 6. This sewing structure and operation are similar to those conventionally known, and the present invention improves the structure for adjusting the tension of the looper thread λ, as shown in FIG.
すなわち、回転駆動する主軸９にウオームギヤ機構１０
を介し回転軸１１が連動され、この軸１１に偏心カム１
２．１２が設けられ、各カム１２．１２に腕１３．１３
が回転可能に嵌まっている。腕１３にはルーパ軸１４．
１４に固定の連結杆１５が回転可能に連結され、回転軸
１１が回転すると、連結杆１５が矢印のごとく揺動する
。That is, the worm gear mechanism 10 is attached to the main shaft 9 that is rotationally driven.
A rotating shaft 11 is interlocked through the shaft 11, and an eccentric cam 1 is connected to this shaft
2.12 are provided and each cam 12.12 has an arm 13.13.
is rotatably fitted. The arm 13 has a looper shaft 14.
A fixed connecting rod 15 is rotatably connected to the connecting rod 14, and when the rotating shaft 11 rotates, the connecting rod 15 swings as shown by the arrow.
一万のルーパ軸１４に上ルーバ３の揺動杆４が連結され
、上ルーパ３はミシンフレーム１に回転可能に設けたホ
ルダー１７に移動可能に挿通されており、揺動杆４の揺
動によりルーパ３がホルダー１７を支点として回転しな
がら上下動する。他方のルーパ軸１４には下ルーパ６が
固着され、ルーパ軸１４の回動につれて揺動する。A swinging rod 4 of an upper louver 3 is connected to a looper shaft 14 of 10,000, and the upper looper 3 is movably inserted into a holder 17 rotatably provided on the sewing machine frame 1. As a result, the looper 3 moves up and down while rotating with the holder 17 as a fulcrum. The lower looper 6 is fixed to the other looper shaft 14 and swings as the looper shaft 14 rotates.
、上記回転軸１１の一端はミシン本体前面に突出し、こ
の端にカム部材１８が固着されている。カム部材１８の
外周面に全周に亘る溝１９が形成され、この溝１９に糸
調子器８から各ルーパ３，６への糸１が嵌められて第４
図に示すように迂回する。One end of the rotating shaft 11 protrudes from the front of the sewing machine body, and a cam member 18 is fixed to this end. A groove 19 extending over the entire circumference is formed on the outer peripheral surface of the cam member 18, and the thread 1 from the thread tension device 8 to each looper 3, 6 is fitted into this groove 19.
Detour as shown.
カム部材１日の外周面の糸λとの接触部は回転につれて
移動し、その接触部の回転中心に対する距離が変化し、
糸この径路が長短される。すなわち、上ルーパ３が最下
点、下ルーパ６が最左点の時、第５図（ａ）の状態とな
って糸ａを調子器８から必要量引出す作用を終え、両ル
ーパ３，６が針板付近から最上点、最右点に至ると、同
（ｂ）から（Ｃ）の状態となり、ルーパ３，６の上昇に
ともなって発生する糸λの弛みを吸収し、再度針板付近
に戻ると、同（ｄ）から（ｅ）の状態となり、ルーパ３
，６の下降にともなって生じる残量の糸λの弛みを吸収
し、上ルーパ３が最下点前、下ルーパ６が最左点前に至
ると、同（ｆ）の状態に移行して糸λの糸調子器８から
の引き出し作用をはじめ、つぎに同（ａ）の状態に至る
。この作用によって、ルーパ３，６の動きに対応した糸
径路の長短が決定されて糸３の弛み吸収及び糸供給など
の糸ａの調子調整が行なわれる。したがって、カム部材
１８の回転中心位置及び設定角度（回転軸１１に対する
取付角度）を上記作用が円滑かつ確実に行なわれるよう
に設定する。設定角度は調節可能とすれば、種々のルー
パ３．６の運動に対応させることができ、また、カム部
材１８の形状も円板形にかぎらず、外周面に凹凸を形成
してルーパ３，６の踵々の運動に対し上記作用に正確に
対応するようにする。The contact part of the outer peripheral surface of the cam member with the thread λ moves as it rotates, and the distance of the contact part from the center of rotation changes,
The path of the thread is lengthened or shortened. That is, when the upper looper 3 is at the lowest point and the lower looper 6 is at the leftmost point, the state shown in FIG. When it reaches the uppermost point and the rightmost point from near the throat plate, the state changes from (b) to (C), and the slack in the thread λ that occurs as the loopers 3 and 6 rise is absorbed, and the thread λ reaches the uppermost point and the rightmost point again. When it returns to the state shown in (d) to (e), the looper 3
, 6 are absorbed, and when the upper looper 3 reaches the lowest point and the lower looper 6 reaches the leftmost point, the state shifts to state (f). The action of pulling out the thread λ from the thread tension device 8 begins, and then the state shown in (a) is reached. This action determines the length of the yarn path corresponding to the movement of the loopers 3 and 6, and adjusts the condition of the yarn a, such as absorbing slack in the yarn 3 and supplying the yarn. Therefore, the rotational center position and set angle (mounting angle with respect to the rotating shaft 11) of the cam member 18 are set so that the above-mentioned action is performed smoothly and reliably. If the setting angle is adjustable, it can be made to correspond to various movements of the looper 3.6, and the shape of the cam member 18 is not limited to a disk shape, but can be adjusted by forming irregularities on the outer peripheral surface. The above action is made to correspond accurately to the movement of the heels of No. 6.
実施例は以上のように構成されており、つぎにその作用
について説明する。The embodiment is configured as described above, and its operation will be explained next.
まず、従来と同様に、糸調子器８から引き出した糸ａを
、ガイド７、カム部材１８を径て両ルーパ３，６に通す
。この状態で、ミシンを駆動スルと、針１６とルーパ３
，６の協動作用により縁かがり縫いが行なわれる。この
縫成時、主軸９の駆動によりカム部材１８が回転し、ル
ーパ３，６の運動に対応して第５図（ａｌ乃至（ｆ）の
ごとく作用して糸３の弛み吸収及び糸供給の調子調整を
行ない、良好な縫目が形成される。First, as in the conventional case, the thread a pulled out from the thread tension device 8 is passed through the guide 7 and the cam member 18 to both the loopers 3 and 6. In this state, drive the sewing machine, needle 16 and looper 3.
, 6 perform the overlock stitching. During this sewing, the cam member 18 is rotated by the drive of the main shaft 9, and acts as shown in FIGS. The tension is adjusted and a good seam is formed.
この発明は以上のよう（こ構成し、ルーパの運動と切り
離されたカム部材の回転運動によって糸調子調整を行な
うようにしたので、ルーパ運動に対し糸の供給作用及び
吸収作用の最適な糸調子を容易に行なうことができ、最
良な縫目を形成することができる。The present invention is constructed as described above, and the thread tension is adjusted by the rotational movement of the cam member which is separated from the movement of the looper, so that the thread tension can be adjusted to an optimum level for the yarn supplying and absorbing actions with respect to the looper movement. can be easily performed and the best seams can be formed.
また、ミシン本体前面に露出するものはカム部材であり
、このカム部、材は外周面が北面となり、手に触れても
危なくなく、また、カム部、簡への糸かけも従来の可動
ガイド片のガイドへのそれに比べはるかに容易である。In addition, what is exposed on the front of the sewing machine is the cam member, and the outer circumferential surface of this cam member faces north, so it is safe to touch with your hands, and threading to the cam part and thread can be done using the conventional movable guide. It is much easier than that to guide the pieces.
さらに、カム部材は合成樹脂成形品を使用することがで
き、コスト的にも有利となる。Furthermore, the cam member can be made of a synthetic resin molded product, which is advantageous in terms of cost.
第１図はこの発明のミシンの一実施例の正面図、第２図
は第１図の右側面図、第３図は実施例の要部斜視図、第
４図は第３図の正面図、第５図（３）乃至（ｆ）は作用
説明図、第６図は従来のミシンの要部正面図である。
１・・・ミシンフレーム、３・・・上ルーパ、６・・・
下ルーパ、７・・・ガイド、８・・・糸調子器、９・・
・主軸、１６・・・針、１８・・・カム部材。Fig. 1 is a front view of an embodiment of the sewing machine of the present invention, Fig. 2 is a right side view of Fig. 1, Fig. 3 is a perspective view of essential parts of the embodiment, and Fig. 4 is a front view of Fig. 3. , FIGS. 5(3) to 5(f) are action explanatory views, and FIG. 6 is a front view of the main parts of a conventional sewing machine. 1... Sewing machine frame, 3... Upper looper, 6...
Lower looper, 7... Guide, 8... Thread tension device, 9...
- Main shaft, 16... needle, 18... cam member.
Claims (1)
より縫成を行なうミシンにおいて、主軸と連動して回転
するカム部材をミシンフレームに設け、糸調子器からル
ーパへのルーパ糸を、前記カム部材の外周変位面に接し
させて迂回させ、その外周変位面を、前記ルーパ糸の径
路を長短させてその長さがルーパの動きに対応するよう
にカム部材の回転につれてルーパ糸との接触部が回転中
心に対し変位する形状としたことを特徴とするミシン。In a sewing machine that performs sewing by the cooperation of a needle with needle thread and a looper with looper thread, a cam member that rotates in conjunction with the main shaft is installed on the sewing machine frame, and the looper thread is transferred from the thread tension device to the looper. , the outer peripheral displacement surface of the cam member is brought into contact with and detoured around, and the outer peripheral displacement surface is connected to the looper yarn as the cam member rotates so that the path of the looper yarn is lengthened or shortened so that the length corresponds to the movement of the looper. A sewing machine characterized in that the contact portion of the sewing machine is shaped so that it is displaced relative to the center of rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303685A JPS61181488A (en) | 1985-02-07 | 1985-02-07 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303685A JPS61181488A (en) | 1985-02-07 | 1985-02-07 | Sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61181488A true JPS61181488A (en) | 1986-08-14 |
Family
ID=12099239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2303685A Pending JPS61181488A (en) | 1985-02-07 | 1985-02-07 | Sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61181488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237942A (en) * | 1991-03-01 | 1993-08-24 | Juki Corporation | Overlock sewing machine having upper and lower looper thread takeup lever drive mechanisms |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5511353A (en) * | 1978-07-12 | 1980-01-26 | Chiyou Lsi Gijutsu Kenkyu Kumiai | Etching method |
| JPS5525879A (en) * | 1978-08-16 | 1980-02-23 | Hitachi Ltd | Tape driver |
-
1985
- 1985-02-07 JP JP2303685A patent/JPS61181488A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5511353A (en) * | 1978-07-12 | 1980-01-26 | Chiyou Lsi Gijutsu Kenkyu Kumiai | Etching method |
| JPS5525879A (en) * | 1978-08-16 | 1980-02-23 | Hitachi Ltd | Tape driver |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237942A (en) * | 1991-03-01 | 1993-08-24 | Juki Corporation | Overlock sewing machine having upper and lower looper thread takeup lever drive mechanisms |
| DE4206326C2 (en) * | 1991-03-01 | 2001-11-15 | Juki Kk | Overlock sewing machine |
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