JPH0331271Y2 - - Google Patents
Info
- Publication number
- JPH0331271Y2 JPH0331271Y2 JP1984077841U JP7784184U JPH0331271Y2 JP H0331271 Y2 JPH0331271 Y2 JP H0331271Y2 JP 1984077841 U JP1984077841 U JP 1984077841U JP 7784184 U JP7784184 U JP 7784184U JP H0331271 Y2 JPH0331271 Y2 JP H0331271Y2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- needle
- sewing machine
- looper
- cam
- 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 25
- 239000004744 fabric Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は二重環縫いミシンや安全縫いミシン
など二重環縫い目を形成するミシンに使用され
る。[Detailed description of the invention] Industrial application field This invention is used in sewing machines that form double chain stitches, such as double chain stitch sewing machines and safety stitch sewing machines.
従来技術
二重環縫い目は一般に次のようにして形成され
る。Prior Art A double chain seam is generally formed as follows.
針が下死点に達して反転し（第３ａ図）、やゝ
上昇したときに形成される針糸ループ２を二重環
ルーパ３が捕捉する（第３ｂ図）。針１が更に上
昇し上死点に達して反転する間、二重環ルーパ３
は針糸ループ２が掛け渡された状態で楕円軌跡を
描いて右死点に達する（第３ｃ図）。二重環ルー
パ３が右死点より左方に楕円軌跡を描いて移動す
るとき針糸とルーパ糸４によつて形成される三角
形の域内に針１が下降する（第３ｄ図）。二重環
ルーパ３が更に左方へ移動すると該ルーパに掛け
られていた一針前の針糸ループがルーパより抜け
る（第３ｅ図）。その後は再び上記の過程が繰返
され、二重環縫い目が順次形成されていく。 When the needle reaches the bottom dead center and reverses itself (Fig. 3a), the needle thread loop 2 formed when it rises slightly is caught by the double ring looper 3 (Fig. 3b). While the needle 1 further rises, reaches the top dead center and reverses, the double ring looper 3
traces an elliptical trajectory with the needle thread loop 2 wrapped around it and reaches the right dead center (Fig. 3c). When the double ring looper 3 moves to the left from the right dead center in an elliptical trajectory, the needle 1 descends into a triangular area formed by the needle thread and the looper thread 4 (Fig. 3d). When the double loop looper 3 moves further to the left, the previous needle thread loop, which was hooked on the looper, comes out of the looper (Fig. 3e). Thereafter, the above process is repeated again, and double chain stitches are successively formed.
上記の過程において針糸は天秤等の糸制御体に
よつて制御され、緊張或いは弛緩する。すなわち
針上昇時には針糸が取り上げられて緊張し、これ
により縫い目が締められると同時に糸供給源から
針糸が繰出され、また針下降時には緊張が解除さ
れ弛められる。ここで問題はルーパに掛け渡され
た針糸ループが針の降下に伴つて弛緩してルーパ
糸との間で形成されるべき必要な三角形が形成さ
れなくなり、そのため針が降下する際、針糸ルー
プを引つ掛けたり、三角形の域外を通過したりし
て糸切れや目飛びを生じる傾向があることであ
る。布がない状態でミシンを作動し、空環を生じ
させる場合にはことに針糸の弛緩が顕著となるた
め上記のような現象が生じ易い。 In the above process, the needle thread is controlled by a thread control body such as a thread take-up, and is tensioned or relaxed. That is, when the needle is raised, the needle thread is picked up and tensioned, thereby tightening the stitch and at the same time the needle thread is paid out from the thread supply source, and when the needle is lowered, the tension is released and relaxed. The problem here is that the needle thread loop wrapped around the looper relaxes as the needle descends, and the necessary triangle that should be formed between it and the looper thread is no longer formed. There is a tendency for yarn to break or skip stitches due to loops being caught or passing outside the triangular area. When the sewing machine is operated without cloth and an empty ring is produced, the loosening of the needle thread becomes particularly noticeable, and the above-mentioned phenomenon is likely to occur.
この問題を解消する試みが特公昭55−43797号
により提案されている。 An attempt to solve this problem has been proposed in Japanese Patent Publication No. 55-43797.
この装置はミシン本体に固定された糸案内片
と、針の上昇時に縫い目を緊締し、かつ糸供給源
から針糸を繰り出すように針糸を緊張する一方、
針の下降時にその緊張を解除するように運動する
糸制御体との間に配置される板バネと基板とから
構成される係止体からなつており、針とともに上
下動する糸制御体の上昇に伴つて板バネと基板と
の間に進入した針糸を板バネによつて針が三角形
の域内に降下するまで係止してその間の針糸の弛
緩を防止しようとするもので、針が三角形の域内
に降下して下死点に達するまでの間に係止体によ
る針糸の係止を解除するようにしている。 This device consists of a thread guide piece fixed to the sewing machine body, which tightens the seam when the needle rises, and tensions the needle thread to pay out the needle thread from the thread supply source.
It consists of a locking body consisting of a plate spring and a base plate, which is placed between a thread control body that moves to release the tension when the needle descends, and the thread control body moves up and down with the needle. The needle thread that enters between the leaf spring and the board due to the movement of the needle is stopped by the leaf spring until the needle descends into the triangular area, and the needle thread is prevented from loosening during that time. The locking of the needle thread by the locking body is released while the needle thread descends into the triangular area and reaches the bottom dead center.
しかしながら上記のような係止体では針糸を係
止する板バネのバネ圧の調整が難しく、また針糸
の太さに対応して針糸の係止を解除するタイミン
グの調整が困難である。 However, with the above-mentioned locking body, it is difficult to adjust the spring pressure of the leaf spring that locks the needle thread, and it is also difficult to adjust the timing to release the lock of the needle thread depending on the thickness of the needle thread. .
特開昭54−2847号に示されるように、針棒とと
もに上下動するカム状の天秤によつて針降下時の
糸の弛みを吸収するようにしたものもある。しか
しながらこの装置では、針糸が固定糸案内と天秤
を経て針上方の面板に立設された糸案内に通さ
れ、ついでこれより直角に屈曲垂下して針棒に固
定した糸案内より針に通されるようになつてお
り、針の上下動ストロークがほゞそのまゝ糸引出
し量となるため多量に糸を消費する縁かゞり縫い
用の針糸に対しては問題なくても二重環縫い用の
針糸では糸の弛みを十分に吸収し得ない嫌いがあ
る。 As shown in Japanese Patent Application Laid-Open No. 54-2847, there is also a thread take-up that uses a cam-like thread take-up that moves up and down with the needle bar to absorb the slack in the thread when the needle is lowered. However, with this device, the needle thread passes through a fixed thread guide and a thread take-up, and then passes through a thread guide installed upright on a face plate above the needle, and then bends down from this at a right angle and passes through the needle through a thread guide fixed to the needle bar. Since the vertical movement stroke of the needle is almost the same as the amount of thread pulled out, even if there is no problem with the needle thread for edge stitching, which consumes a large amount of thread, double thread is used. Chain stitch needle thread has the disadvantage of not being able to sufficiently absorb thread slack.
しかもこの装置では針糸制御を一つの天秤のみ
によつて行つているが、こうした装置では、針が
上死点から70〜80゜降下するとき糸さばき量を多
くしようとすると、カムのリフトを大きく、カム
の形状を急激に変化させねばならなくなるため糸
がカムに引掛かつてスムースな動きが生じにくゝ
なる。また上昇時も下降時も同じ針糸制御を行
い、ミシン針が針糸ループとルーパ糸によつて形
成される三角形の域内に降下するまでの間の必要
時のみ糸の弛みを吸収することができない。 Moreover, in this device, needle thread control is performed using only one thread take-up, but with such a device, if you want to increase the amount of thread handling when the needle descends 70 to 80 degrees from top dead center, the cam lift will be increased. Since the size is large and the shape of the cam must be changed rapidly, the thread may get caught on the cam, making it difficult to move smoothly. In addition, the same needle thread control is performed both when raising and lowering, and slack in the thread can be absorbed only when necessary until the sewing machine needle descends into the triangular area formed by the needle thread loop and looper thread. Can not.
考案が解決しようとする課題
本考案は上記の問題を解決することを目的とす
る。Problems to be solved by the invention This invention aims to solve the above problems.
課題の解決手段
本考案はそのため、ミシンの針株に付設した糸
さばき体により針糸を緊張或いは弛緩させて二重
環縫い目を形成するミシンの糸制御装置におい
て、針株近傍に針株と一体となつて上下動する目
孔１７ａと、その側方のミシン本体に取着される
糸道２３を設けるとともに前記糸さばき体１８と
は位相を遅らせて針糸２６の運動軌跡と交差する
ように上下動し、糸道２３から目孔１７ａに至る
二重環縫い用の針糸２６に糸さばき体１８ととも
に作用する凸形の糸制御カム３０を別に設け、前
記目孔１７ａの上下動により糸道２３を中心とし
て上下に揺動する針糸２６を糸さばき体１８と糸
制御カム３０とで両側から挟むようにして係合し
てミシン針１２が上死点より二重環ルーパに掛け
られた針糸ループと、ルーパ糸とによつて形成さ
れる三角形の域内に降下するまでの間、ミシン針
の降下に伴つて生じようとする針糸の弛みを吸収
し、ミシン針が上記三角形の域内を降下したのち
は糸制御カム３０が針糸２６から離間することを
特徴とするものである。Solution to the Problem Therefore, the present invention provides a thread control device for a sewing machine that tensions or relaxes the needle thread using a thread handling body attached to the needle stock to form a double chain stitch. An eye hole 17a that moves up and down and a thread path 23 attached to the sewing machine body on the side thereof are provided, and the thread handling body 18 is arranged so as to intersect with the locus of movement of the needle thread 26 with a delayed phase. A convex thread control cam 30 that moves up and down and acts together with the thread handling body 18 on the needle thread 26 for double chain stitching from the thread path 23 to the eye hole 17a is separately provided. The needle thread 26, which swings up and down about the path 23, is engaged with the thread handling body 18 and the thread control cam 30 so as to sandwich it from both sides, and the sewing machine needle 12 is hooked from the top dead center to the double ring looper. Until the needle thread descends into the triangular area formed by the thread loop and the looper thread, the slack in the needle thread that tends to occur as the sewing machine needle descends is absorbed, and the sewing machine needle moves within the triangular area. This is characterized in that the thread control cam 30 separates from the needle thread 26 after being lowered.
実施例
第１図は本考案の一実施例である安全縫いミシ
ンを示すもので、既知のように針株に取付けられ
る二本の針１１，１２のうち、一方の針１１は上
ルーパ１３及び下ルーパ１４と協動して被縫製物
の布端に縁かゞり縫い目を形成し、また他方の針
１２は二重環ルーパ１５と協動して縁かゞり縫い
目の内側に該縫い目と平行な二重環縫い目を形成
する。Embodiment FIG. 1 shows a safety stitch sewing machine which is an embodiment of the present invention.As is known, among the two needles 11 and 12 attached to the needle stock, one needle 11 is connected to the upper looper 13 and The other needle 12 cooperates with the lower looper 14 to form a hem stitch on the edge of the fabric to be sewn, and the other needle 12 cooperates with the double ring looper 15 to form the hem stitch on the inside of the hem stitch. form a double chain seam parallel to the
上記針株にはまた補助糸調子器１７と糸さばき
体１８がそれぞれ止めネジ１９及び２０にて止着
してある。補助糸調子器１７は図示していない
が、裏側から板片をバネで圧接させて後述の糸挟
持体を形成し、その糸挟持体により縁かゞり用針
糸の張力を制御するようになつているとともに、
その手前上部には二重環縫い用の針糸を案内する
目孔１７ａを設けている。糸さばき体１８は縁
かゞり縫い用針糸２１が通される縦向きの長孔状
カム溝２４を有し、該カム溝は糸さばき体１８の
上下動に伴つてその両側に配置される糸道２５間
の縁かゞり縫い用針糸２１に作用し、該針糸を緊
張或いは弛緩する。糸さばき体１８は更に作業者
側の端面がカム部２７として形成され、ミシン本
体２２の手前側方に上下位置が調整可能に止着さ
れる糸道２３と上記目孔１７ａとの間の二重環縫
い用針糸２６に作用し、後述する糸制御カム３０
とともに針糸２６の制御を行いうるようになつて
いる。 An auxiliary thread tension device 17 and a thread handling body 18 are also fixed to the needle stock with setscrews 19 and 20, respectively. Although the auxiliary thread tension device 17 is not shown, a plate piece is pressed against the back side by a spring to form a thread clamping body, which will be described later, and the tension of the needle thread for edge stitching is controlled by the thread clamping body. As I get older,
An eye hole 17a for guiding needle thread for double chain stitching is provided at the upper part of the front side. The thread handling body 18 has a vertical long hole-shaped cam groove 24 through which the edge stitching needle thread 21 is passed, and the cam grooves are arranged on both sides of the thread handling body 18 as it moves up and down. It acts on the edge stitching needle thread 21 between the thread paths 25 and tensions or loosens the needle thread. The end surface of the thread handling body 18 facing the operator is further formed as a cam part 27, and the thread handling body 18 has a cam part 27 formed between the thread guide 23, which is fixed to the front side of the sewing machine main body 22 so that its vertical position can be adjusted, and the eye hole 17a. A thread control cam 30 that acts on the needle thread 26 for heavy chain stitching and will be described later
At the same time, the needle thread 26 can be controlled.
２８は上メスレバー２９に取付けられる布切断
用の上メスで、既知のものと異なり被縫製物を送
るのに支障を来たさない範囲内で針１１，１２と
位相を異にし、針より遅れて上下動するようにな
つており、上メスレバー２９には上メス２８のほ
かに糸さばき体１８と糸道２３との間の二重環縫
い用針糸２６に作用する凸形の糸制御カム３０が
上メス２８とは上下逆向きにして止めネジ３１に
より位置調整可能に取付けられている。図中３２
及び３３は糸調子器で、糸供給源から糸調子器３
２に通された縁かゞり縫い用針糸２１は上記した
糸道２３、糸道２５、糸さばき体１８のカム溝２
４、糸道２５及び補助糸調子器１７の裏側の糸挾
持体（図示しない）等を経て針１１に通され、ま
た別の糸供給源から糸調子器３３に通された二重
環縫い用針糸２６は糸道２３、目孔１７ａを経て
針１２に通されるようになつている。 28 is an upper knife for cutting cloth that is attached to the upper knife lever 29, and unlike known ones, it has a phase different from that of the needles 11 and 12 within a range that does not interfere with feeding the sewing material, and lags behind the needles. In addition to the upper knife 28, the upper knife lever 29 has a convex thread control cam that acts on the double chainstitch needle thread 26 between the thread handling body 18 and the thread path 23. 30 is mounted in an upside-down direction with respect to the upper knife 28 so that its position can be adjusted using a set screw 31. 32 in the diagram
and 33 are thread tension devices, which connect the thread tension device 3 from the thread supply source.
The edge stitching needle thread 21 passed through the thread guide 23, the thread guide 25, and the cam groove 2 of the thread handling body 18 is
4. For double chain stitching, the thread is passed through the needle 11 through the thread path 25 and the thread clamp holder (not shown) on the back side of the auxiliary thread tension device 17, and then passed through the thread tension device 33 from another thread supply source. The needle thread 26 is threaded through the needle 12 through the thread path 23 and the eye hole 17a.
作 用
次に二重環縫い用針糸２６に対する制御につい
て説明する。Operation Next, control of the double chain stitch needle thread 26 will be explained.
針１２が上死点に達して降下し始める第３ｃ図
の状態より針糸２６は針と一体の目孔１７ａの降
下により弛もうとするが、針とは遅れて上下動す
る糸制御カム３０が針糸２６に係合してその弛み
を吸収し始める（第２Ａ図）。針１２が更に下降
すると、糸制御カム３０は上死点に達して下降し
始め、その間に針糸２６を糸さばき体のカム部２
７と糸制御カム３０で屈折させ、目孔１７ａの降
下に伴つて生じようとする針糸２６の弛みを吸収
する（第２Ｂ図）、これにより二重環ルーパ１５
に掛けられている針糸ループはある程度の緊張状
態を保ち、ルーパ糸とで針が通るのに必要な三角
形を形成する（第３ｄ図）。針が三角形の域内を
通り、更に降下すると二重環ルーパ１５は楕円軌
跡を描きながら左方へ移動し、該ルーパに掛かつ
ていた針糸ループが抜けるが（第３ｅ図）、この
間に糸制御カム３０は針糸２６より外れて該糸に
作用しなくなり、糸さばき体１８のカム部２７の
みが針糸２６に作用して針糸ループがルーパ１５
より抜けたのちも該糸の緊張状態を保持する（第
２Ｃ図）。これにより針糸ループが引締められ、
被縫製物に形成される二重環縫い目の針糸を締め
る。同時に針糸２６の緊張が維持された状態での
目孔１７ａの降下によつて糸供給源から次の縫い
目形成に必要な糸が引出される。次いで針が下死
点に達して上昇する際、これより遅れて下死点に
達する糸制御カム３０は針糸２６から離間して作
用せず、したがつて針の上昇期に余分な張力が
かゝらないため針糸ループが従前通り形成され、
ルーパ１５による針糸ループの捕捉が行われる。 From the state shown in FIG. 3c where the needle 12 reaches the top dead center and begins to descend, the needle thread 26 attempts to loosen due to the descent of the eye hole 17a integrated with the needle, but the thread control cam 30 moves up and down with a delay from the needle. engages with the needle thread 26 and begins to absorb its slack (FIG. 2A). As the needle 12 further descends, the thread control cam 30 reaches the top dead center and begins to descend, during which time the needle thread 26 is moved to the cam portion 2 of the thread handling body.
7 and the thread control cam 30 to absorb the slack in the needle thread 26 that tends to occur as the eye hole 17a descends (Fig. 2B).
The loop of needle thread held on the looper maintains some tension, and together with the looper thread forms the triangle necessary for the needle to pass through (Figure 3d). As the needle passes through the triangular area and descends further, the double ring looper 15 moves to the left while drawing an elliptical trajectory, and the needle thread loop that was hanging on the looper comes out (Fig. 3e), but during this time the thread control The cam 30 comes off from the needle thread 26 and no longer acts on the thread, and only the cam portion 27 of the thread handling body 18 acts on the needle thread 26, causing the needle thread loop to pass through the looper 15.
The thread remains taut even after it is pulled out (Figure 2C). This tightens the needle thread loop,
Tighten the needle thread of the double chain stitch formed on the workpiece. At the same time, by lowering the eyelet 17a while the tension of the needle thread 26 is maintained, the thread necessary for forming the next stitch is drawn out from the thread supply source. Then, when the needle reaches the bottom dead center and rises, the thread control cam 30, which reaches the bottom dead center later than this, is separated from the needle thread 26 and does not act, so that there is no extra tension during the rising phase of the needle. The needle thread loop is formed as before because there is no need to
The looper 15 captures the needle thread loop.
上記実施例では糸制御カム３０は針とは位相を
異にして上下に揺動させるようにした上メスレバ
ー２９に取付けているが、主軸に連動して上下動
或いは揺動する部材を備えた機構を別に設け、上
記部材に糸制御カムを取付けてもよい。 In the embodiment described above, the thread control cam 30 is attached to the upper knife lever 29 which swings up and down in a phase different from that of the needle. A thread control cam may be separately provided and a thread control cam may be attached to the above member.
効 果
本考案の針糸制御装置は以上のように、糸さば
き体とは別に糸制御カムを設け、該カムにより針
が上死点から二重環ルーパに掛けられている一針
前の針糸ループとルーパ糸とによつて形成される
三角形の域内に降下するまでの間の針糸に作用し
てミシン針の降下に伴つて生じようとする針糸の
弛みを吸収するようにしたため、糸の太さに関係
なく糸の弛緩が防止され、針が三角形の域内に確
実に降下し糸切れや目飛びを生じないこと、針株
近傍に設けた目孔にその側方から針糸を供給し、
目孔の上下動により針糸が糸道を中心として上下
に揺動するようになつているため糸引出し量が針
の上下動ストロークよりも小さくなり、そのため
吸収すべき弛み量が少なくなるうえ糸制御カムは
凸形で、針が上記三角形の域内に降下したのちは
針糸から離れるようになつており、離れたのちは
針の降下のみによつて糸の引出しが行われ、余剰
の糸が引出されないため糸制御が容易となり、引
締まつた縫い目が形成されること、針糸は糸制御
カムで押込まれ、糸さばき体と糸制御カムで屈折
するため各カムのリフトを少なくすることがで
き、針糸の動きをスムースにすることができるこ
となどの効果を有する。Effects As described above, the needle thread control device of the present invention is provided with a thread control cam separate from the thread handling body, and the cam controls the needle one stitch before the needle is hooked from the top dead center to the double loop looper. The needle thread acts on the needle thread before it descends into the triangular area formed by the thread loop and the looper thread, and absorbs the slack in the needle thread that tends to occur as the sewing machine needle descends. Regardless of the thickness of the thread, the thread should be prevented from loosening, and the needle should fall securely within the triangular area without thread breakage or skipped stitches. supply,
As the needle thread moves up and down around the thread path due to the up and down movement of the eye hole, the amount of thread pulled out is smaller than the up and down stroke of the needle, which reduces the amount of slack that must be absorbed and reduces the thread tension. The control cam has a convex shape, and is designed to separate from the needle thread after the needle has descended into the triangular area, and after the needle has separated, the thread is pulled out only by the needle descending, and the excess thread is removed. Since the needle thread is not pulled out, it is easy to control the thread and a tight stitch is formed.The needle thread is pushed in by the thread control cam and bent by the thread handling body and thread control cam, so the lift of each cam can be reduced. , it has the effect of making the movement of the needle thread smoother.
第１図は本考案に係る針糸制御装置を備えたミ
シンの正面図、第２Ａ〜２Ｃ図は同ミシンの要部
斜視図で糸制御カムの作用順を示す。第３ａ〜３
ｅ図は二重環縫い目の縫い目形成過程を示す説明
図である。
１２……針、１５……二重環ルーパ、１７ａ…
…目孔、１８……糸さばき体、２５……糸道、２
６……針糸、２７……カム部、２８……上メス、
３０……糸制御カム。
FIG. 1 is a front view of a sewing machine equipped with a needle thread control device according to the present invention, and FIGS. 2A to 2C are perspective views of essential parts of the same sewing machine, showing the order of operation of the thread control cam. Part 3a-3
Figure e is an explanatory diagram showing the process of forming a double chain seam. 12... Needle, 15... Double ring looper, 17a...
... Eye hole, 18 ... Thread handling body, 25 ... Thread path, 2
6...needle thread, 27...cam part, 28...upper knife,
30...Thread control cam.
Claims (1)
を緊張或いは弛緩させて二重環縫い目を形成する
ミシンの糸制御装置において、針株近傍に針株と
一体となつて上下動する目孔１７ａと、その側方
のミシン本体に取着される糸道２３を設けるとと
もに前記糸さばき体１８とは位相を遅らせて針糸
２６の運動軌跡と交差するように上下動し、糸道
２３から目孔１７ａに至る二重環縫い用の針糸２
６に糸さばき体１８とともに作用する凸形の糸制
御カム３０を別に設け、前記目孔１７ａの上下動
により糸道２３を中心として上下に揺動する針糸
２６を糸さばき体１８と糸制御カム３０とで両側
から挟むようにして係合してミシン針１２が上死
点より二重環ルーパに掛けられた針糸ループと、
ルーパ糸とによつて形成される三角形の域内に降
下するまでの間、ミシン針の降下に伴つて生じよ
うとする針糸の弛みを吸収し、ミシン針が上記三
角形の域内に降下したのちは糸制御カム３０が針
糸２６から離間することを特徴とするミシンの糸
制御装置。 In a thread control device for a sewing machine that tensions or relaxes needle thread using a thread handling body attached to a needle stock of the sewing machine to form a double chain stitch, an eye hole 17a that moves vertically together with the needle stock is located near the needle stock. A thread path 23 attached to the sewing machine main body on the side thereof is provided, and the thread handling body 18 moves up and down so as to retard the phase and intersect with the locus of movement of the needle thread 26. Needle thread 2 for double chain stitching reaching hole 17a
6 is separately provided with a convex thread control cam 30 that acts together with the thread handling body 18, and controls the needle thread 26, which swings up and down about the thread path 23 by the vertical movement of the eye hole 17a, with the thread handling body 18. a needle thread loop that is engaged with the cam 30 from both sides so that the sewing machine needle 12 is hung from the top dead center on the double loop looper;
Until the sewing machine needle descends into the triangular area formed by the looper thread, it absorbs the slack in the needle thread that tends to occur as the sewing machine needle descends, and after the sewing machine needle descends into the triangular area, A thread control device for a sewing machine, characterized in that a thread control cam 30 is spaced apart from a needle thread 26.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7784184U JPS60188581U (en) | 1984-05-25 | 1984-05-25 | Sewing machine thread control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7784184U JPS60188581U (en) | 1984-05-25 | 1984-05-25 | Sewing machine thread control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60188581U JPS60188581U (en) | 1985-12-13 |
| JPH0331271Y2 true JPH0331271Y2 (en) | 1991-07-02 |
Family
ID=30621274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7784184U Granted JPS60188581U (en) | 1984-05-25 | 1984-05-25 | Sewing machine thread control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60188581U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0647426Y2 (en) * | 1988-04-01 | 1994-12-07 | ペガサスミシン製造株式会社 | Needle thread judgment of safety sewing machine |
| JPH0693949B2 (en) * | 1989-04-17 | 1994-11-24 | ペガサスミシン製造株式会社 | Needle thread take-up mechanism of safety stitch machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS542847A (en) * | 1977-06-06 | 1979-01-10 | Juki Kk | Controller of cotton in sewing machine provided with looper |
-
1984
- 1984-05-25 JP JP7784184U patent/JPS60188581U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS542847A (en) * | 1977-06-06 | 1979-01-10 | Juki Kk | Controller of cotton in sewing machine provided with looper |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60188581U (en) | 1985-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3766297B2 (en) | Multi-needle double chain stitch sewing machine needle thread controller | |
| JPS649879B2 (en) | ||
| JP3364164B2 (en) | Blanking machine for flat stitch sewing machine | |
| JPH0331271Y2 (en) | ||
| US5513587A (en) | Thread tensioning for chain stitch sewing machine | |
| US3083661A (en) | Thread pull-off for sewing machines | |
| US4200050A (en) | Thread cutting device for lockstitch sewing machines | |
| CA2024141C (en) | Satin stitch presser foot | |
| JPS596679B2 (en) | Needle thread control mechanism in chain stitch sewing machine | |
| JP2974557B2 (en) | Stitch forming method and apparatus for double chain stitch sewing machine | |
| US4279210A (en) | Looper thread tension device | |
| JPH0647426Y2 (en) | Needle thread judgment of safety sewing machine | |
| US2198312A (en) | Sewing machine | |
| JPH06257060A (en) | Device for forming loop seam | |
| JPH0333339Y2 (en) | ||
| JPH0314145Y2 (en) | ||
| JP2571036Y2 (en) | Multi-needle interlock stitch machine | |
| JPS6130627Y2 (en) | ||
| JP2971074B2 (en) | Single thread single thread chain stitching device in overlock sewing machine | |
| JP2000218071A (en) | Multi-needle multi-thread chain stitch sewing machine | |
| JPS6138539Y2 (en) | ||
| JPH0411239B2 (en) | ||
| JPH0418548Y2 (en) | ||
| JP3714975B2 (en) | Thread fall prevention device for rake sewing machine | |
| JPH0521600B2 (en) |