JPH021517B2 - - Google Patents
Info
- Publication number
- JPH021517B2 JPH021517B2 JP29814185A JP29814185A JPH021517B2 JP H021517 B2 JPH021517 B2 JP H021517B2 JP 29814185 A JP29814185 A JP 29814185A JP 29814185 A JP29814185 A JP 29814185A JP H021517 B2 JPH021517 B2 JP H021517B2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- arm
- presser foot
- link member
- adjustment
- 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 16
- 238000010408 sweeping Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- 241001417527 Pempheridae Species 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明はミシンの糸払い装置に関し、特にサイ
クル系閂止めミシンにおいて、縫製が一サイクル
完了すると糸切りメスにより上糸の布側と下糸と
を切断し、布押えが上昇する前に上糸の針側糸を
針板上へ糸払いする、一連の操作を行わしめる手
段に利用される。Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to a thread removing device for a sewing machine, and in particular, in a cycle type bar tack sewing machine, when one sewing cycle is completed, the upper thread is removed by a thread trimming knife. It is used as a means for performing a series of operations such as cutting the fabric side and the bobbin thread, and sweeping the needle side thread of the upper thread onto the throat plate before the presser foot is raised.
（従来の技術）
従来の閂止めミシンにおける糸払い装置では、
米国特許第2902960号明細書、図面にみられる如
く、その糸払い機構は、押え上げの上下作用と同
調して作動するものが一般的であつた。(Prior art) In the conventional bar tack sewing machine, the thread removing device
As seen in the specification and drawings of US Pat. No. 2,902,960, the thread removing mechanism generally operated in synchronization with the vertical action of the presser foot lifter.
また最近のミシンでは、糸払いの作動をリンク
部材を用いて、押え昇降装置と連動させたものも
見受けられる。 Furthermore, in some recent sewing machines, the operation of thread removal is linked to a presser foot lifting device using a link member.
（発明が解決しようとする問題点）
上記いづれの従来手段においても、糸払い作動
は、糸が切断された直後の好時機に実行されない
と、糸切断後の上糸の残に量にバラツキが生じ
る。また前記糸払いのタイミングが遅きに失する
と、布押えが上昇して来て、糸払い部材の払い運
動に支障をきたすような問題が生ずる。(Problems to be Solved by the Invention) In any of the above conventional means, if the thread wiping operation is not performed at an appropriate time immediately after the thread is cut, the amount of needle thread remaining after the thread is cut may vary. arise. Further, if the thread wiping timing is too late, the presser foot will rise, causing a problem such as interfering with the wiping movement of the thread wiping member.
従つて、押え及び糸払いの動きに関しては、ミ
シンが停止し針棒が上死点付近に停止するタイミ
ングと、糸切りメスが作動して糸を切断するタイ
ミングとの同調が、最良状態にある事を必須要件
とする。 Therefore, with regard to the movements of the presser foot and thread sweeper, the best synchronization is between the timing when the sewing machine stops and the needle bar stops near top dead center, and the timing when the thread trimming knife operates and cuts the thread. This is an essential requirement.
これらのタイミングが不調の際は、糸払いによ
る上糸切断後の糸残り長さに変化が生じ、次段縫
製に対する縫い目の美しさ、縫い目の出来ばえ等
に悪影響を及ぼす。 If these timings are not correct, the length of the remaining thread after cutting the needle thread by thread sweeper will change, which will have a negative effect on the beauty of the stitches and the quality of the stitches for the next stage of sewing.
従来装置では、上記これらタイミングの調整が
非常に厄介であつた。本発明においては、この欠
点を解消し、簡単に最良のタイミング調整し得る
装置の開発を計つたものである。 In conventional devices, adjusting these timings is extremely troublesome. The present invention aims to overcome this drawback and to develop a device that can easily adjust the timing to the best of its ability.
（問題点を解決するための手段）
上記課題を解決するため、本発明においては、
次の様な技術的手段を講じた。
(Means for solving the problems) In order to solve the above problems, in the present invention,
The following technical measures were taken.
(1) 押え作動部材３と連動して糸払いアーム２２
を作動するリンク部材を設けた。(1) The thread removing arm 22 works in conjunction with the presser foot operating member 3.
A link member is provided to operate the.
(2) 上記リンク部材の一端にリンク体１０を設
け、該リンク体をミシンアーム本体へ軸支１２
し、その一端に長溝状の孔を設け、連結ロツド
１５の連結支点の位置が調整出来る様に支持
し、常に時計方向へ回動するよう付勢した。(2) A link body 10 is provided at one end of the link member, and the link body is pivoted to the sewing machine arm body 12.
A long groove-shaped hole was provided at one end to support the connecting rod 15 so that the position of the connecting fulcrum could be adjusted, and to always urge it to rotate clockwise.
(3) 前記リンク体の支軸上に調整アーム１１を設
けた。(3) An adjustment arm 11 is provided on the support shaft of the link body.
(4) 前記調整アームはその一端を前記押え作動部
材の連動ピン３ａと対応させ、他端にはカム溝
孔１１ｂを設け、前記連結ロツドの連結支点と
同軸の連結ピン１３で前記リンク体へ結合し
た。(4) The adjusting arm has one end corresponding to the interlocking pin 3a of the presser operating member, and the other end is provided with a cam slot 11b, and is connected to the link body by a connecting pin 13 coaxial with the connecting fulcrum of the connecting rod. Combined.
（作用）
上記の構成により、押え作動部材を操作し押え
が上昇するように、該押え作動部材を押圧する
と、連動ピンが調整アームを反時計方向へ回動せ
しめる。そして、連結ロツドを介して、糸払いア
ームが作動する。このとき、前記調整アームの円
周方向位置を調整するように連結ピンを移して固
定する。即ち、押え作動部材の連動ピンと調整ア
ームとの接触時期を調整する事により、糸払いア
ームの待機位置から作動開始の時期までを、早く
したり、遅くしたり調整することが可能となる。(Function) With the above configuration, when the presser foot actuating member is operated and the presser foot actuating member is pressed so that the presser foot rises, the interlocking pin rotates the adjustment arm counterclockwise. Then, the thread removing arm is operated via the connecting rod. At this time, the connecting pin is moved and fixed so as to adjust the circumferential position of the adjustment arm. That is, by adjusting the timing of contact between the interlocking pin of the presser foot actuating member and the adjustment arm, it is possible to adjust the time from the standby position of the thread removing arm to the timing of starting operation to be earlier or later.
これにより、従来の欠点を解消する。 This eliminates the conventional drawbacks.
（実施例）
第１図に於いて、１はミシンアーム、２はミシ
ンベツド、３は押え８を昇降させる押え作動部
材、４は布押え腕、５は押え作動アームで、該作
動アーム５は軸７で布押え腕４に取付けられてお
り、一端が押えるに遊嵌され他端は押えバネ６で
上方へ押圧を受けている。(Example) In Fig. 1, 1 is a sewing machine arm, 2 is a sewing machine bed, 3 is a presser foot operating member that raises and lowers the presser foot 8, 4 is a presser foot arm, 5 is a presser foot actuator arm, and the actuator arm 5 is a shaft. It is attached to the presser foot arm 4 at 7, one end is loosely fitted into the presser foot, and the other end is pressed upward by a presser spring 6.
第２図に於いて、アーム１にネジ２５で固定さ
れたブラケツト２４に糸払いアーム２２が軸２３
で回動可能に取付けられ、糸払いアーム２２の一
端は軸２１でリンク２０と連結している。第１図
に示す如く、リンク２０はアーム１に軸支１８さ
れたベルクランク１７の一端に軸１９で連結さ
れ、該ベルクランク１７の他端は連結ロツド１５
に軸１６で連結されている。そして該連結ロツド
１５は、アーム１に軸１２で支えられたリンク体
１０の長孔１０ｂへ連結ピン１３で連結されてい
る（第４図参照）。前記リンク体１０には、カム
溝１１ｂを持つ調整アーム１１が重合され、連結
ピン１３はこのカム溝１１ｂを通し、ピン１５、
座金１４ａ、ナツト１４で結合し前記リンク体１
０と調整アーム１１との夫々を調整した位置で固
定する。前記調整アーム１１の一端１１ａは押え
作動部材３のピン３ａと接触できる様にしてあ
り、前記リンクアーム１０は常にスプリング２６
で時計方向へ回動する様にバネ力を受け、ストツ
プピン２７で止められている。今、第５図に示す
如く、押え作動部材３が上昇した位置、即ち、調
整アーム１１の１１ａ部がピン３ａと接触する位
置に調整して連結ピン１３をナツト１４で固定す
る。この時押え作動部材３を下降して押え８を上
昇させると、第５図の仮線で示す如く調整アーム
１１は軸１２を中心として反時計方向へα度回動
する。従つて、リンク部材を経由して糸払いアー
ム２２は第７図示の如くβ度反時計方向へ回動し
糸を払うことになる。然し、糸払いアームの動き
（タイミング）が早すぎるときは、第４図に示す
如く連結ピン１３をナツト１４をゆるめて軸１２
から遠ざかる様に移動する。この時調整アーム１
１はカム溝１１ｂによつて自動的に軸１２を中心
として反時計方向へ回動する。即ち、第４図に示
す如く、連動ピン３ａと調整アーム１１の一端１
１ａとのスキマを作つて、押え作動部材３の動き
に対し、ある時間遅れてリンク部材が作動する様
にする。従つて、調整アームの固定位置を調整す
ることにより、糸払いアーム２２の動き（タイミ
ング）を調整することができる。 In FIG. 2, the thread removing arm 22 is attached to the shaft 23 on the bracket 24 which is fixed to the arm 1 with a screw 25.
One end of the thread removing arm 22 is connected to the link 20 via a shaft 21. As shown in FIG. 1, the link 20 is connected by a shaft 19 to one end of a bell crank 17 which is pivotally supported 18 on the arm 1, and the other end of the bell crank 17 is connected to a connecting rod 15.
is connected by a shaft 16. The connecting rod 15 is connected by a connecting pin 13 to a long hole 10b of a link body 10 supported by a shaft 12 on the arm 1 (see FIG. 4). An adjustment arm 11 having a cam groove 11b is superimposed on the link body 10, and the connecting pin 13 passes through the cam groove 11b, and the pin 15,
The link body 1 is connected with a washer 14a and a nut 14.
0 and the adjustment arm 11 are each fixed at the adjusted position. One end 11a of the adjustment arm 11 is configured to be able to contact the pin 3a of the presser foot actuating member 3, and the link arm 10 is always connected to the spring 26.
It receives a spring force so that it rotates clockwise, and is stopped by a stop pin 27. Now, as shown in FIG. 5, the presser foot actuating member 3 is adjusted to the raised position, that is, the position where the portion 11a of the adjusting arm 11 contacts the pin 3a, and the connecting pin 13 is fixed with the nut 14. At this time, when the presser foot actuating member 3 is lowered and the presser foot 8 is raised, the adjustment arm 11 rotates counterclockwise by α degrees about the shaft 12, as shown by the dotted line in FIG. Therefore, the thread removing arm 22 is rotated counterclockwise by β degrees via the link member, as shown in FIG. 7, to remove the thread. However, if the movement (timing) of the thread cleaning arm is too fast, loosen the connecting pin 13 and the nut 14 and tighten the shaft 12 as shown in FIG.
move away from. At this time, adjustment arm 1
1 is automatically rotated counterclockwise about the shaft 12 by the cam groove 11b. That is, as shown in FIG. 4, the interlocking pin 3a and one end 1 of the adjustment arm 11
A gap is created with 1a so that the link member operates with a certain time delay with respect to the movement of the presser operating member 3. Therefore, by adjusting the fixed position of the adjustment arm, the movement (timing) of the thread removal arm 22 can be adjusted.
然し、この時第４図の如く調整アームの回転角
は、第５図の場合のαに対しα1と少なくなる。従
つて糸払いの回転角も第７図に示す如くβからβ1
と減少するわけである。しかし、本発明による構
造では、連結ピン１３が前述した通り軸１２から
遠ざかる様に第５図Ｒから第４図R1と拡大され
る為、リンク部材のリンク比により、第７図の糸
払いアームはβ1の回転でなくβの角度回転するこ
とができる。 However, at this time, as shown in FIG. 4, the rotation angle of the adjustment arm becomes α1 , which is smaller than α in the case of FIG. Therefore, the rotation angle of the thread wiper also changes from β to β 1 as shown in Figure 7.
Therefore, it decreases. However, in the structure according to the present invention, since the connecting pin 13 is enlarged from R in FIG. 5 to R1 in FIG. 4 so as to move away from the shaft 12 as described above, the thread removal The arm can rotate through an angle of β instead of a rotation of β 1 .
この構造では、糸払いのタイミングを調整して
も糸払いアームの糸を払い終る位置は常に一定と
なり、縫いに対し不具合条件を発生することなく
最適の縫い条件とすることができる。 With this structure, even if the timing of thread sweeping is adjusted, the position at which the thread sweeping arm finishes sweeping the thread is always constant, and optimal sewing conditions can be achieved without causing problems with sewing.
尚、このリンク部材の調整部分は本実施例と異
なる糸払いアームまでの中間に設けても同一目的
を達成することができる。 Incidentally, the same purpose can be achieved even if the adjustment portion of this link member is provided in the middle up to the thread removal arm, which is different from the present embodiment.
〔発明の効果〕
本発明装置では、押え作動部材と糸払いアーム
間を連結するリンク部材で、前記押え作動部材の
作動範囲に対し、リンク部材の作動範囲を制限す
ることによつてその目的を達成した。特に、その
調整アームとリンク体を重ね合せに構成し、連結
ロツドの連結ピンを各々のカム溝に係合させたこ
とにより、調整アームの作動角を調整すると、自
動的に連結ロツドの連結ピンの半径方向位置が変
更するようになされた。[Effects of the Invention] In the device of the present invention, the link member that connects the presser foot actuating member and the thread removing arm achieves its purpose by limiting the operating range of the link member with respect to the actuating range of the presser foot actuating member. Achieved. In particular, the adjustment arm and the link body are configured to overlap, and the connecting pin of the connecting rod is engaged with each cam groove, so that when the operating angle of the adjusting arm is adjusted, the connecting pin of the connecting rod automatically The radial position of is changed.
従つて、糸払いアームの作動範囲は、常に一定
角度の回動を行い、極めて安定した上糸の糸払い
を可能とする特有効果をもつ。 Therefore, the operating range of the thread wiping arm always rotates at a constant angle, which has the unique effect of enabling extremely stable thread wiping of the upper thread.
また、タイミング調整を行うためには、針棒停
止、糸切りメス作動、糸払い、押え上昇等の一連
の動作が自動的になされるわけで、実施例示の如
く少ない作動範囲で、押えや針に接触することな
く、しかも完全で良好な糸払い運動を得るには、
各リンク部材には高度な精度が要求される。しか
し本発明においては、簡単な調整手段の実施で上
記の精度要求が緩和されると共に、組立調整作業
の能率向上に寄与する副次効果をも有する。 In addition, in order to adjust the timing, a series of operations such as stopping the needle bar, operating the thread trimming knife, removing the thread, and raising the presser foot are automatically performed. To obtain a complete and good thread sweeping motion without contacting the thread,
A high degree of precision is required for each link member. However, in the present invention, the above-mentioned precision requirement is relaxed by implementing a simple adjustment means, and it also has a side effect that contributes to improving the efficiency of assembly and adjustment work.
第１図は本発明装置の正面組付状態の作動説明
図、第２及び３図は夫々第１図示糸払いアームの
組付説明図、第４及び５図は本発明装置の構成作
動説明図、第６図は第４，５図示要部の説明補足
詳細図、第７図は糸払いアームの作動説明図であ
る。
１……ミシンアーム、２……ミシンベツド、３
……押え作動部材、４……布押え腕、５……押え
作動アーム、８……押え、１０……リンク体、１
１……調整アーム、１３……連結ピン、１５……
連結ロツド、１７……ベルクランク、２０……リ
ンク、２２……糸払いアーム、２７……ストツプ
ピン。
Fig. 1 is an explanatory diagram of the operation of the device of the present invention in a front assembled state, Figs. 2 and 3 are explanatory diagrams of the assembly of the thread removing arm shown in Fig. 1, respectively, and Figs. 4 and 5 are explanatory diagrams of the configuration and operation of the device of the present invention. , FIG. 6 is a supplementary detailed view of the main parts shown in FIGS. 4 and 5, and FIG. 7 is an explanatory view of the operation of the thread removal arm. 1... Sewing machine arm, 2... Sewing machine bed, 3
... Presser foot actuation member, 4 ... Presser foot arm, 5 ... Presser foot actuation arm, 8 ... Presser foot, 10 ... Link body, 1
1... Adjustment arm, 13... Connection pin, 15...
Connection rod, 17... Bell crank, 20... Link, 22... Thread removal arm, 27... Stop pin.
Claims (1)
動せしめるリンク部材を備えたサイクル系閂止め
ミシンの糸払い装置において、リンク体の支持軸
上に調整アーム部材を重設し、該リンク体と調整
アームの夫々に設けた長孔に挿通される連結ピ
ン、及び該連結ピン固定手段により、固定位置調
節可能に前記リンク部材を結合してなるミシンの
糸払い装置。1. In a thread removing device for a cycle bar tack sewing machine that is equipped with a link member that operates a thread removing arm in conjunction with a presser foot operating member, an adjustment arm member is superimposed on the support shaft of the link member, and A thread removing device for a sewing machine comprising a connecting pin inserted through a long hole provided in each of the adjustment arms, and a link member coupled to the link member such that the fixing position thereof can be adjusted by means of the connecting pin fixing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29814185A JPS62155895A (en) | 1985-12-27 | 1985-12-27 | Yarn sweeping apparatus of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29814185A JPS62155895A (en) | 1985-12-27 | 1985-12-27 | Yarn sweeping apparatus of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62155895A JPS62155895A (en) | 1987-07-10 |
| JPH021517B2 true JPH021517B2 (en) | 1990-01-11 |
Family
ID=17855720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29814185A Granted JPS62155895A (en) | 1985-12-27 | 1985-12-27 | Yarn sweeping apparatus of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62155895A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4095337B2 (en) * | 2002-05-14 | 2008-06-04 | Ｊｕｋｉ株式会社 | sewing machine |
| JP4492179B2 (en) * | 2004-03-29 | 2010-06-30 | ブラザー工業株式会社 | sewing machine |
| JP4492178B2 (en) * | 2004-03-29 | 2010-06-30 | ブラザー工業株式会社 | sewing machine |
-
1985
- 1985-12-27 JP JP29814185A patent/JPS62155895A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62155895A (en) | 1987-07-10 |
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