JPS63283687A - Auxiliary yarn take-up apparatus of sewing machine - Google Patents

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） 本発明はミシンの糸取バネの改良にに関するものである
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a thread take-up spring for a sewing machine.

（従来の技術） 従来、ミシンの糸取りバネは、例えば第１２図に示すよ
うに、天秤１の糸保持部２を通る糸道の糸折り返し部分
にバネ圧調整機構３と共に渦巻き状の糸取りバネ４が装
着されているか、或は、第１３図、第１４図に示すよう
に、バネ圧調整機構３と共にストレートの糸取りバネ５
が装着されている。この場合、天秤１が最上位付近の糸
締め時に圧縮され、天秤降下時は余分な糸６を吸収して
糸６をさばく作用と、天秤上昇途中の釜の糸抜は時に・
糸抜けを良くする作用があった。天秤１が最上位付近で
の糸取りバネ作用は薄地を縫う際に余分な糸６を繰り出
したり、糸取りバネ４．５の圧力による先締めなどの悪
影響を出さない程度の弱いバネであり、かつ、ミシンの
スピードに追従可能なバネである必要があった。よって
、そのバネ圧を調整し得るようバネ圧の調整機構３を備
えていた。(Prior Art) Conventionally, as shown in FIG. 12, for example, the thread take-up spring of a sewing machine has a spiral thread take-up spring 4 along with a spring pressure adjustment mechanism 3 at the thread turn-back portion of the thread path passing through the thread holding portion 2 of the thread take-up 1. is installed, or as shown in FIGS. 13 and 14, a straight thread take-up spring 5 is installed together with the spring pressure adjustment mechanism 3.
is installed. In this case, the thread take-up 1 is compressed when the thread is tightened near the top, and when the thread take-up descends, it absorbs the excess thread 6 and loosens the thread 6, and sometimes the thread is removed from the hook while the thread take-up is rising.
It had the effect of improving thread removal. The action of the thread take-up spring when the thread take-up spring 1 is near the highest position is a weak spring that does not cause any negative effects such as letting out excess thread 6 when sewing thin fabrics or tightening the thread due to the pressure of the thread take-up spring 4.5, and The spring needed to be able to follow the speed of the sewing machine. Therefore, a spring pressure adjustment mechanism 3 was provided to adjust the spring pressure.

（発明が解決しようとする問題点） 従って、この場合、バネ圧調整機構３がミシンを一層複
雑にするばかりか、加工布及び糸６の種類によってバネ
圧を適切に調整する必要があることから、ミシンの縫製
作業に際しては相当の熟練を要する等の欠点があった。(Problems to be Solved by the Invention) Therefore, in this case, the spring pressure adjustment mechanism 3 not only makes the sewing machine even more complicated, but also requires adjusting the spring pressure appropriately depending on the type of fabric and thread 6. However, there were drawbacks such as the need for considerable skill when sewing with a sewing machine.

（問題を解決するための手段） 本発明は、Ｆ糸保持体を内蔵し回転止め部材により回転
が規制された内釜と縫針の目孔に形成された糸輪を捕捉
し拡大するために回転する外釜とからなる回転釜と、そ
の回転釜への糸の供給のために所定の最大糸弛緩位置に
向って運動すると共に、前記拡大された糸輪を引締める
ために所定の最大糸取上位置に向って運動づる糸取上体
とを備えたミシンにおいて、 前記回転止め部材と内釜との間を糸輪が通過する時に前
記糸取上体が位置する特定位置近傍に所定移動範囲内に
て移動可能に配設され、糸取上体が前記最大糸取上位置
から最大糸弛緩位置に向って運動する時に糸取上体の糸
保持部に保持された糸を係止する糸係止移動体と、 前記所定移動範囲を決定する両制限位置の中で眞記最大
糸取上位置の側に位置する制限位置に向って前記糸係止
移動体を常時付勢する弾性体とを含むミシンの補助糸取
上装置にある。(Means for Solving the Problem) The present invention has an inner hook which has a built-in F thread holder and whose rotation is regulated by a rotation stopper member, and which rotates to capture and enlarge the thread loop formed in the eye hole of the sewing needle. a rotary hook that moves toward a predetermined maximum yarn relaxation position for supplying yarn to the rotary hook, and a predetermined maximum yarn take-up position for tightening the expanded yarn loop; In a sewing machine equipped with a thread take-up body that moves toward an upper position, a predetermined movement range is provided in the vicinity of a specific position where the thread take-up body is positioned when the thread ring passes between the rotation stopper member and the inner hook. a thread that is movably disposed within the thread and locks the thread held in the thread holding section of the thread take-up body when the thread take-up body moves from the maximum thread take-up position to the maximum thread relaxation position; a locking moving body; and an elastic body that constantly urges the thread locking moving body toward a limit position located on the side of the maximum thread take-up position among the two limit positions that determine the predetermined movement range. It is located in the auxiliary thread take-up device of the sewing machine, including the

（作用） このように構成されたミシンの補助糸取上装置において
、糸取上体が所定移動範囲の最大糸取上位置から最大糸
弛緩位置に向って移動すると、糸取上体の糸保持部に保
持された糸は、糸道途上の糸係止移動体に係止されると
ともに、揺動方向における針落ちの差及び糸の太さの違
いによるがま糸量の差は、弾性体の付勢力に抗しての糸
係止移動体の移動によって糸調子を乱さないように適切
に自動調整される。その結果、加工布の種類及び糸の種
類に拘らずきれいで安定した縫目を形成することができ
、又、糸係止移動体が、回転止め部材と内釜との間を糸
輪が通過する時に前記糸取上体が位置する特定位置近傍
に配置された状態で所定移動範囲内の移動可能なため、
針落ち位置、糸の太さに関係なく釜からの先後けを円滑
にするとともに、先後は騒音を低下させる。(Function) In the auxiliary thread take-up device of the sewing machine configured as described above, when the thread take-up body moves from the maximum thread take-up position to the maximum thread relaxation position within the predetermined movement range, the thread retention of the thread take-up body stops. The thread held in the section is stopped by a thread locking moving body on the way of the thread, and the difference in needle drop in the swinging direction and the difference in the amount of bobbin thread due to the difference in thread thickness are absorbed by the elastic body. The thread tension is appropriately automatically adjusted so as not to disturb the thread tension due to the movement of the thread locking moving body against the urging force of the thread locking member. As a result, a clean and stable seam can be formed regardless of the type of fabric and thread, and the thread locking moving body allows the thread ring to pass between the rotation stopper and the inner hook. When the thread take-up body is located near the specific position where the thread take-up body is located, it can be moved within a predetermined movement range.
To make the leading and trailing from the hook smooth regardless of the needle drop position and thread thickness, and to reduce noise at the leading and trailing ends.

（実施例） 次に、本発明の構成を第１図〜第１１図によって説明す
る。(Example) Next, the structure of the present invention will be explained with reference to FIGS. 1 to 11.

電子制御式本縫いミシン１１の機枠を構成するベッド部
１２の右端部に立設された脚柱部１３には、その上端か
ら左に水平に延びてベッド部１２の上方に対向するアー
ム部１４が配設され、このアーム部１４の左端部に面板
１５が取付けられ、その面板１５によりＩｒ１ｓが構成
されている。その頭部１５には、押え棒１６がその下端
の押え足１７と共に図示省略押え棒上下レバーにより上
下動可能に取付けられている他、針棒支持体１８に上下
動可能に取付けられた針棒１９がその下端の縫針２０と
共にミシン主軸２１により上下に駆動かつ公知の揺動機
構によりピン２２を中心にして左右に揺動駆動可能に取
付けられている。The pedestal part 13 erected at the right end of the bed part 12 constituting the machine frame of the electronically controlled lockstitch sewing machine 11 has an arm part that extends horizontally to the left from its upper end and faces above the bed part 12. A face plate 15 is attached to the left end of the arm portion 14, and the face plate 15 constitutes Ir1s. A presser bar 16 and a presser foot 17 at its lower end are attached to the head 15 so as to be movable up and down by a presser bar up and down lever (not shown), and a needle bar is attached to a needle bar support 18 so as to be movable up and down. 19 is mounted so that it can be driven up and down by a sewing machine main shaft 21 together with a sewing needle 20 at its lower end, and can be driven to swing left and right about a pin 22 by a known swinging mechanism.

前記ミシン主軸２１はブツシュメタル２３等を介して機
枠に回転可能に支持され、この主軸２１の斜め上の後方
には副軸２４が主軸２１と平行かつ機枠に回転可能に取
付けられ、この副軸２４に揺動レバー２５の一端部が回
転可能に取付けられ、該揺動レバー２５は副軸２４から
主軸２１に固着された天秤クランク２６の左端面側に延
び、天秤クランク２６のクランクピン２７は揺動レバー
２５の細長いカム孔２８を挿通して延び、揺動レバー２
５の左側においてクランクビン２７の左端部には連結板
２９が固着され、該連結板２９から左方へ延びるピン３
０には針棒クランク３１が回転可能に連結され、針棒ク
ランク３１の下端部が針棒１９の中段部に連結されてい
る。The main shaft 21 of the sewing machine is rotatably supported on the machine frame via a bushing metal 23, etc., and a sub-shaft 24 is rotatably attached to the machine frame in parallel with the main shaft 21 diagonally above and behind the main shaft 21. One end of a swinging lever 25 is rotatably attached to the shaft 24, and the swinging lever 25 extends from the subshaft 24 to the left end side of a balance crank 26 fixed to the main shaft 21, and is connected to a crank pin 27 of the balance crank 26. extends through the elongated cam hole 28 of the swing lever 25, and the swing lever 2
A connecting plate 29 is fixed to the left end of the crank bin 27 on the left side of the crankshaft 5, and a pin 3 extending leftward from the connecting plate 29 is fixed to the left end of the crank bin 27.
A needle bar crank 31 is rotatably connected to the needle bar 0, and a lower end portion of the needle bar crank 31 is connected to a middle portion of the needle bar 19.

揺動レバー２５の前部の上端部には、クランク状に上方
に延びる天秤３２（糸取上体）が一体内に形成され、該
天秤３２の上端部にはスリット３３を通して上糸３４を
保持する糸保持部３５が形成されている。A thread take-up lever 32 (thread take-up body) that extends upward in the shape of a crank is formed inside the upper end of the front part of the swing lever 25, and a needle thread 34 is held through a slit 33 at the upper end of the thread take-up lever 32. A thread holding section 35 is formed.

前記揺動レバー２５のカム孔２８は、第２図、第３図に
示すように、クランクビン２７の回転軌跡と同半径でか
つ最上位置付近にあるクランクビン２７が約７４°回転
するのを許す円弧孔３７とその円弧孔３７の両端部から
真直ぐに延びる短い直孔３８とから形成され、このカム
孔２８の外周部は補強部３９で補強されている。As shown in FIGS. 2 and 3, the cam hole 28 of the swing lever 25 prevents the crank bin 27, which is located at the same radius as the rotation locus of the crank bin 27 and near the uppermost position, from rotating approximately 74 degrees. The cam hole 28 is formed of a circular arc hole 37 and a short straight hole 38 extending straight from both ends of the circular arc hole 37, and the outer periphery of the cam hole 28 is reinforced with a reinforcing portion 39.

前記揺動レバー２５のカム孔２８にクランクビン２７が
挿通した状態で天秤クランク２６及びクランクビン２７
が主軸２１回りに回転すると、揺動レバー２５はａｊ軸
２４を揺動中心としてクランクビン２７によって第２図
に実線で図示の最上位置と図示しない最下位置に亙っで
上下に往復揺動駆動され、このとき、ミシン主軸２１の
回転運動に同期して針棒クランク３１とクランクビン２
７を介して針棒１９が上下に往復駆動される。　前記主
軸２１の左端の針棒クランク３１の直ぐ左側には機枠の
一部である板部材４０が主軸２１と直交状に設けられて
いる。第２図に示すように主軸２１よりも少し前方の位
置で、板部材４０の左側部には上糸３４に通過抵抗を与
え得るブリテンション装置４１が必要に応じて設けられ
る。With the crank pin 27 inserted into the cam hole 28 of the swing lever 25, the balance crank 26 and the crank pin 27 are inserted.
When the lever 25 rotates around the main shaft 21, the swing lever 25 swings up and down by the crank pin 27 with the A/J axis 24 as the center of swing between the top position shown in solid line in FIG. 2 and the bottom position not shown. At this time, the needle bar crank 31 and the crank bin 2 are driven in synchronization with the rotational movement of the sewing machine main shaft 21.
The needle bar 19 is reciprocated up and down via the needle 7. Immediately to the left of the needle bar crank 31 at the left end of the main shaft 21, a plate member 40, which is a part of the machine frame, is provided perpendicularly to the main shaft 21. As shown in FIG. 2, at a position slightly forward of the main shaft 21 and on the left side of the plate member 40, a britension device 41 capable of imparting passage resistance to the needle thread 34 is provided as necessary.

このブリテンション装置４１は一対の糸調子皿４２の間
に上糸３４を通過させ、ダイヤルを回動操作することに
よりスプリング力を調整して糸通過抵抗を調整し得るよ
うにしである。更に、糸駒４３から天秤３２の糸保持部
３５を経て縫針２０の目孔に至る上糸供給通路のうち、
糸駒４３から天秤３２の糸保持部３５に至る上糸３４を
主軸２１の運動と調時して拘束したり解放したりするこ
とができるように、次のような糸通過制御装置４４が設
けられている。This britension device 41 allows the upper thread 34 to pass between a pair of thread tension discs 42, and by rotating a dial, the spring force can be adjusted to adjust the thread passing resistance. Further, among the needle thread supply passages from the thread spool 43 to the eye of the sewing needle 20 via the thread holding portion 35 of the thread take-up lever 32,
The following thread passage control device 44 is provided so that the upper thread 34 from the thread spool 43 to the thread holding portion 35 of the thread take-up lever 32 can be restrained or released in synchronization with the movement of the main shaft 21. It is being

前記１リテンシヨン装置４１の下方位置において板部材
４０の左側に糸道規制板４５〈糸係合体）が固着され、
この糸道規制板４５の左側面の近傍に配設された可動板
４６とリンクアーム４７の下端部とが段付ネジ４８で板
部材４０に回動自在に取付けられ、可動板４６の可動輪
４９（糸係合体）が糸道規制板４５の規制部５０に下方
より当接して規制部５０と可動輪４９との間に上糸３４
を挟持拘束し得るように配設され、可動板４６はそのｑ
動輪４９が規制部５０へ圧接されるように一端が機枠に
固定されたバネ５１で弾性付勢され、可動板４６の腕部
５２の上端の接触幅５３がリンクアーム４７の下端近く
の接触部５４に前方より接触している。A yarn path regulating plate 45 (yarn engagement body) is fixed to the left side of the plate member 40 at a position below the first retention device 41,
A movable plate 46 disposed near the left side of the yarn path regulating plate 45 and the lower end of a link arm 47 are rotatably attached to the plate member 40 with step screws 48, and the movable plate 46 49 (thread engaging body) contacts the regulating portion 50 of the thread path regulating plate 45 from below, and the upper thread 34 is placed between the regulating portion 50 and the movable ring 49.
The movable plate 46 is arranged so as to be able to clamp and restrain the q
The driving wheel 49 is elastically biased by a spring 51 fixed to the machine frame at one end so that the driving wheel 49 is pressed against the regulating part 50, and the contact width 53 of the upper end of the arm part 52 of the movable plate 46 is in contact with the lower end of the link arm 47. It is in contact with the portion 54 from the front.

第２図、第５図に示すように、可動輪４９の周面には環
状のＶ溝５５が形成され、糸道規制板４５の規制部５０
は可動輪４９の上半部の■溝５５に上方から係合するよ
うに側面視にて逆Ｕ字形に形成され、この規制部５０は
断面Ｕ字形の突曲面状に形成されている。As shown in FIGS. 2 and 5, an annular V-groove 55 is formed on the circumferential surface of the movable ring 49, and a regulating portion 50 of the yarn path regulating plate 45
is formed into an inverted U shape when viewed from the side so as to engage with the groove 55 in the upper half of the movable ring 49 from above, and the regulating portion 50 is formed into a convex curved surface having a U-shaped cross section.

前記ブリテンション装置４１を通過してきた上糸３４は
糸道規制板４５の規制部５０でＵ字状に屈曲して天秤３
２の糸保持部３５を経由して縫針２０へ延びている。The upper thread 34 that has passed through the britension device 41 is bent into a U-shape at the regulating portion 50 of the thread path regulating plate 45 and sent to the thread take-up 3.
It extends to the sewing needle 20 via the thread holding section 35 of No. 2.

そして、主軸２１の回転に調時して可動板４６の可動輪
４９を上下に駆動し上糸３４の開放と拘束とを所定のタ
イミングで実行させるため、副軸２４の右端側部分に対
応する位置において主軸２１には楕円状のカム溝５６を
有する回転カム５７が固着され、副軸２４に固唱された
第１アーム５８の先端の接触子５９がカム溝５６に係合
している。Then, in order to drive the movable ring 49 of the movable plate 46 up and down in synchronization with the rotation of the main shaft 21 to release and restrain the upper thread 34 at a predetermined timing, it corresponds to the right end side portion of the sub-shaft 24. In this position, a rotary cam 57 having an elliptical cam groove 56 is fixed to the main shaft 21, and a contact 59 at the tip of a first arm 58 fixed to the sub-shaft 24 is engaged with the cam groove 56.

一方、副軸２４の左端部には第２アーム６０が固着され
、第２アーム６０の下端部はリンクアーム４７のルーズ
ビン孔６１にピン６２を嵌めることにより連結されてい
る。On the other hand, a second arm 60 is fixed to the left end of the subshaft 24, and the lower end of the second arm 60 is connected by fitting a pin 62 into a loose bottle hole 61 of the link arm 47.

一方、ベッド部１２内には、下糸保持体のボビン６３を
内蔵し回転止め部材６４により回転が規制された内釜６
５と縫針２０の目孔に形成された糸輪を捕捉し拡大する
ために回転する外釜６６とからなる回転釜６７が取付け
られ、該回転釜６７への上糸３４の供給は、糸取上体の
天秤３２が所定の最大糸弛緩位置に向って運動すると共
に、前記拡大された糸輪を引締めるために所定の最大糸
取上位はに向って運動することによって行われる。On the other hand, inside the bed portion 12 is an inner hook 6 which has a bobbin 63 as a bobbin thread holder built therein and whose rotation is regulated by a rotation stopper 64.
5 and an outer hook 66 that rotates to catch and enlarge the thread loop formed in the eye hole of the sewing needle 20. This is done by moving the upper body balance 32 toward a predetermined maximum yarn relaxation position and toward a predetermined maximum yarn take-up position in order to tighten the enlarged yarn loop.

前記回転止め部材６４と内釜６５との間を糸輪が通過ず
る時に前記天秤３２が位置する特定位置近傍には、第８
図〜第１０図に示すほぼＶの字状糸係止移動体６８が、
最大糸取上位置の側に位置するストッパ６９による制限
位置に向ってコイルスプリング７０により常時付勢され
た状態で取付けられ、該糸係止移動体６８は、天秤３２
が前記最大糸取上位置から最大糸弛緩位置に向って運動
する時に天秤３２の糸保持部３５に保持された上糸３４
を係止する。In the vicinity of a specific position where the thread take-up lever 32 is located when the thread ring passes between the rotation stopper member 64 and the inner hook 65, an eighth
The approximately V-shaped thread locking moving body 68 shown in FIGS.
The thread locking movable body 68 is attached in a state where it is constantly biased by a coil spring 70 toward a limit position by a stopper 69 located on the side of the maximum thread take-up position.
The upper thread 34 held by the thread holding section 35 of the thread take-up lever 32 moves from the maximum thread take-up position to the maximum thread relaxation position.
to lock.

次に、本実施例の作用について説明する。Next, the operation of this embodiment will be explained.

このように構成されたミシンの補助糸取上装置において
、天秤３２が所定移動範囲の最大糸取上位置から最大糸
弛緩位置に向って下動すると、天秤３２の糸保持部３５
に保持された上糸３４は、糸道途上の糸係止移動体６８
に係止されるとともに、揺動方向における針落ち位置の
差及び糸の太さの違いによる釜糸量の差は、コイルスプ
リング７０の付勢力に抗しての糸係止移動体６８の移動
によって調整され、天秤３２が最大糸取上げ位置に向っ
て上昇するときには、上糸３４はコイルスプリング７０
の付勢力の影響を受けることがなく、糸通過制御装置４
４の作動により制御された糸供給量にて適切な糸調子が
得られる。In the auxiliary thread take-up device of the sewing machine configured as described above, when the thread take-up lever 32 moves downward from the maximum thread take-up position within the predetermined movement range to the maximum thread relaxation position, the thread holding portion 35 of the thread take-up thread take-up device of the sewing machine is moved downward.
The upper thread 34 held by the thread locking moving body 68 on the thread path
At the same time, the difference in the needle drop position in the swinging direction and the difference in the amount of thread in the hook due to the difference in thread thickness is caused by the movement of the thread locking moving body 68 against the biasing force of the coil spring 70. When the thread take-up lever 32 rises toward the maximum thread take-up position, the upper thread 34 is moved by the coil spring 70.
The yarn passage control device 4 is not affected by the urging force of
An appropriate thread tension can be obtained with the controlled thread supply amount by the operation of step 4.

その結果、加工布の種類及びト糸３４の種類に拘らずき
れいで安定した縫目を形成することができ、又、糸係止
移動体６８が、回転止め部材６４と内釜６５との問を糸
輪が通過する時にコイルスプリング７０の付勢りのもと
に上糸３４を係止して、その付勢力により上糸３４の糸
輪に適度の張力を付与するため、縫針２０の落ち位置、
上糸３４の太さに関係なく釜からの糸抜けを円滑にする
とともに、糸抜は騒音を低下させる。As a result, it is possible to form a clean and stable seam regardless of the type of work cloth and the type of thread 34, and the thread locking moving body 68 is able to connect the rotation stopping member 64 and the inner hook 65. When the thread loop passes through, the needle thread 34 is held under the bias of the coil spring 70, and the biasing force applies appropriate tension to the thread loop of the needle thread 34, so that the sewing needle 20 does not drop. position,
Regardless of the thickness of the upper thread 34, thread removal from the hook is made smooth, and thread removal reduces noise.

（発明の効果） 本発明は、回転止め部材と内釜との間を糸輪が通過する
時に糸取上体が位置する特定位置近傍に所定移動範囲内
にて移動可能に配設され、糸取上が最大糸取上位置から
最大糸弛緩位置に向って運動する時に糸取上体の糸保持
部に保持された糸を係止する位置に糸係止移動体を配置
させ、かつ、前記所定移動範囲を決牽する自制限位置の
中で前記最大糸取上位置の側に位置する制限位置に向っ
て前記糸係止移動体を弾性体で常時付勢するようにした
ミシンの補助糸取上装置にある。(Effects of the Invention) According to the present invention, the thread take-up body is disposed movably within a predetermined movement range near a specific position where the thread take-up body is positioned when the thread ring passes between the rotation stopper member and the inner hook. The yarn locking moving body is disposed at a position to lock the yarn held in the yarn holding portion of the yarn take-up body when the yarn take-up moves from the maximum yarn take-up position to the maximum yarn relaxation position, and An auxiliary thread of a sewing machine, in which the thread locking moving body is constantly urged by an elastic body toward a limit position located on the side of the maximum thread take-up position among self-limit positions that determine a predetermined movement range. It is in the take-up device.

これによって本発明は、針落ちの差及び糸の太さの違い
による釜糸量の差を、弾性体の付勢力に抗しての糸係止
移動体の移動によって糸調子を乱さないように適切に自
動調整して、加工布の種類及び糸の種類に拘らずきれい
で安定した縫目を形成することができ、又、糸係止移動
体が、回転止め部材と内釜との闇を糸輪が通過する時に
前記糸取上体が位置する特定位置近傍に配置された状態
°で所定移動範囲内の移動可能なため、針の落ち位置、
糸の太さに関係なく釜からの糸抜けを円滑にするととも
に、糸抜は騒音を低下させることができる効果がある。As a result, the present invention can compensate for differences in hook thread amount due to differences in needle drop and thread thickness without disturbing the thread tension due to the movement of the thread locking moving body against the biasing force of the elastic body. Appropriate automatic adjustments can be made to form a clean and stable seam regardless of the type of work cloth or thread, and the thread locking movable body eliminates the gap between the rotation stopper and the inner pot. The thread take-up body can move within a predetermined movement range when it is placed near the specific position where the thread pick-up body is located when the thread ring passes, so the needle drop position,
The thread can be smoothly removed from the hook regardless of the thickness of the thread, and thread removal has the effect of reducing noise.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例の全体を示す斜視図、′　第
２図はその要部斜視図、第３図はその要部破所正面図、
第４図と第５図はその要部詳細図、第６図はその回転釜
６７の正面図、第７図は糸係止移動体６８とスリット天
秤３２との配置を示す左側面図、第８図は糸係止移動体
６８の正面図、第９図はその左側面図、第１０図はその
平面図、第１１図はその動作説明図、第１２図と第１３
図は従来実施例の説明図、第１４図は第１３図の左側面
図である。Fig. 1 is a perspective view showing the entire embodiment of the present invention; Fig. 2 is a perspective view of the main part thereof; Fig. 3 is a front view of the main part broken;
4 and 5 are detailed views of the main parts, FIG. 6 is a front view of the rotary hook 67, FIG. 7 is a left side view showing the arrangement of the thread locking moving body 68 and the slit take-up 32, and FIG. 8 is a front view of the thread locking moving body 68, FIG. 9 is a left side view thereof, FIG. 10 is a plan view thereof, FIG. 11 is an explanatory diagram of its operation, and FIGS. 12 and 13.
The figure is an explanatory diagram of the conventional embodiment, and FIG. 14 is a left side view of FIG. 13.

Claims (2)

【特許請求の範囲】[Claims] （１）下糸保持体を内蔵し回転止め部材により回転が規
制された内釜と縫針の目孔に形成された糸輪を捕捉し拡
大するために回転する外釜とからなる回転釜と、その回
転釜への糸の供給のために所定の最大糸弛緩位置に向っ
て運動すると共に、前記拡大された糸輪を引締めるため
に所定の最大糸取上位置に向って運動する糸取上体とを
備えたミシンにおいて、 前記回転止め部材と内釜との間を糸輪が通過する時に前
記糸取上体が位置する特定位置近傍に所定移動範囲内に
て移動可能に配設され、糸取上体が前記最大糸取上位置
から最大糸弛緩位置に向って運動する時に糸取上体の糸
保持部に保持された糸を係止する糸係止移動体と、 前記所定移動範囲を決定する両制限位置の中で前記最大
糸取上位置の側に位置する制限位置に向って前記糸係止
移動体を常時付勢する弾性体とを含むことを特徴とする
ミシンの補助糸取上装置。(1) A rotary hook consisting of an inner hook that has a built-in bobbin thread holder and whose rotation is regulated by a rotation stopper member, and an outer hook that rotates to capture and enlarge the thread loop formed in the eye of the sewing needle; A thread take-up which moves towards a predetermined maximum thread relaxation position for supplying thread to its rotary hook and towards a predetermined maximum thread take-up position to tighten said enlarged thread loop. in a sewing machine equipped with a sewing machine, the thread take-up body is movably disposed within a predetermined movement range near a specific position where the thread take-up body is positioned when the thread ring passes between the rotation stopper member and the inner hook; a thread locking moving body that locks the yarn held in the thread holding section of the thread take-up body when the thread take-up body moves from the maximum thread take-up position to the maximum yarn relaxation position; and the predetermined movement range. an elastic body that constantly urges the thread locking moving body toward a limit position located on the side of the maximum thread take-up position among both limit positions for determining the maximum thread take-up position. Pick up device. （２）前記糸係止移動体は、所定角度範囲内にて回転可
能に支持されていることを特徴とする特許請求の範囲第
１項記載のミシンの補助糸取上装置。(2) The auxiliary thread take-up device for a sewing machine according to claim 1, wherein the thread locking moving body is rotatably supported within a predetermined angular range.