JPH03280988A - Needle thread takeup lever mechanism of sewing machine - Google Patents
Needle thread takeup lever mechanism of sewing machineInfo
- Publication number
- JPH03280988A JPH03280988A JP8063490A JP8063490A JPH03280988A JP H03280988 A JPH03280988 A JP H03280988A JP 8063490 A JP8063490 A JP 8063490A JP 8063490 A JP8063490 A JP 8063490A JP H03280988 A JPH03280988 A JP H03280988A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- needle
- sewing machine
- take
- dead center
- 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.)
- Granted
Links
- 238000009958 sewing Methods 0.000 title claims abstract description 56
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- 239000004744 fabric Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はミシンの天秤機構に関し、特には簡易糸掛は可
能な天秤機構を備えたミシンに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a thread take-up mechanism for a sewing machine, and more particularly to a sewing machine equipped with a thread take-up mechanism that allows simple threading.
（従来の技術及び発明が解決しようとする課題）従来の
本縫いミシンの上糸供給源である糸コマからミシン針の
針穴に至る上糸糸道には、ミシン機枠上部に配置される
糸案内と、糸調子器とその下方に配置される糸取りバネ
を含む糸掛けと、該糸掛けより上方で上下運動する公知
の天秤とが配置されている。(Prior Art and Problems to be Solved by the Invention) In the needle thread path from the thread spool, which is the needle thread supply source of the conventional lockstitch sewing machine, to the needle hole of the sewing machine needle, a needle thread is placed on the upper part of the sewing machine frame. A thread guide, a thread tension device, a thread hook including a thread take-up spring disposed below the thread guide, and a known thread take-up that moves up and down above the thread guide are arranged.
前記天秤は前記針の上昇時に針糸捕捉手段によって解放
された上糸を引き上げて吸収するために上昇するもので
あり、該天秤と糸調子器との間の糸掛けはこの天秤の上
昇による吸収作用を効果的にするために天秤及び糸調子
器より下方に配置されている。The thread take-up is raised to pull up and absorb the needle thread released by the needle thread catching means when the needle rises, and the thread thread between the thread take-up and the thread tension device is absorbed by the rise of the thread thread take-up. It is placed below the thread take-up and thread tension device for effective operation.
従って上糸糸道に新たに糸掛けをする場合に、前記糸コ
マから引き出されミシン機枠上方の前記糸案内、糸調子
器を経由した上糸は一旦、下方の糸掛けに糸掛けされ、
次に再び上方に操作して上方の天秤の糸穴に糸通した後
に下方の針の糸穴に糸通しすることとなり、特に初心者
においては該操作が複雑で正確に糸掛けが行いにくいも
のであつ！こ。Therefore, when newly threading the upper thread thread path, the upper thread is pulled out from the thread block and passed through the thread guide and thread tension device above the sewing machine frame, and is once threaded onto the lower thread thread guide.
Next, the user must move the needle upward again to pass the thread through the thread hole of the upper thread take-up lever, and then thread the thread through the thread hole of the lower needle.This operation is complicated and difficult to thread accurately, especially for beginners. Hot! child.
このため、下方の糸掛は操作成は上方の天秤への糸掛は
操作を行わずに運転してしまい縫目が正しく形成されな
い現象を生ずることがあった。For this reason, while the lower thread threader is operated, the thread threader on the upper thread thread take-up is operated without being operated, resulting in a phenomenon in which the stitches are not formed correctly.
糸掛けを容易化するものとして、本出願人は先に特開昭
６３−２２９０９０号においてミシンの始動によって作
動する天秤によって糸掛けが行われる自動糸掛は装置を
示したが、該装置の天秤は自動糸かけを達成するために
、従来のものとは異なる天秤駆動機構を必要とし更には
天秤の作動方向が針の上昇方向とは異なることから、そ
の結果として天秤上糸供給量が従来と全く同一とはなら
ない。In order to facilitate threading, the present applicant previously disclosed an automatic threading device in JP-A No. 63-229090 in which threading is performed by a thread take-up activated by the start of the sewing machine. In order to achieve automatic threading, the thread take-up mechanism requires a thread take-up mechanism that is different from the conventional one, and the operating direction of the thread take-up is different from the upward direction of the needle. It won't be exactly the same.
従って、従来とは異なる縫いの調整を必要とし、更には
上糸引き上げ時の引き上げ方向と天秤の吸収作動方向が
異なることにより発生する屈曲した糸道部は上糸吸収時
の糸抵抗の増大に対して糸道の仕上げ状態を従来に増し
て良好に保たなければならないものであった。Therefore, it is necessary to make different sewing adjustments than before, and furthermore, the bent thread path caused by the difference in the pulling direction when pulling up the upper thread and the absorption operation direction of the thread take-up increases the thread resistance when absorbing the upper thread. On the other hand, it was necessary to maintain the finished state of the thread path even better than before.
本発明はこれらの課題を解決して従来と略同−の天秤上
糸供給量が得られ糸抵抗の小なる糸かけが容易な天秤機
構を備えたミシンを提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a sewing machine equipped with a thread take-up mechanism that can provide substantially the same thread take-up amount as the conventional sewing machine and that can easily thread the thread with low thread resistance.
（課題を解決するための手段）
このため本発明においては、駆動軸２とともに回転する
天秤クランク７と、該天秤クランク上の位置であって該
回転軸線から所定の量の偏心した位置に回転可能に支持
され、最大系弛緩位置である下死点位置と最大系取上位
置である上死点位置との間において移動可能な天秤本体
と、該天秤本体の最大系弛緩位置の前後において糸供給
源から針１７に至る糸供給路と交差するように天秤本体
に設けられ、縫い糸を導入するため外方に開放した糸導
入用開口を有する糸保持部と、前記天秤クランク７の回
転軸線に平行なミシン機枠１上の固定軸線の周りに回動
可能に支持され、自由端が前記天秤本体の中間部に回動
可能に連結された天秤支持体とを備えたミシンにおいて
、前記固定軸線を前記駆動軸２より下方であって、上死
点位置における前記糸保持部が位置する点から下死点位
置における前記糸保持部が位置する点に向かう方向と、
上死点位置における前記天秤クランク７の回転軸線から
前記固定軸線に延びる方向とが略同じ方向になるように
固定軸線を配置する。(Means for Solving the Problems) Therefore, in the present invention, there is provided a balance crank 7 that rotates together with the drive shaft 2, and a position on the balance crank that is rotatable to a position eccentric by a predetermined amount from the rotation axis. a thread take-up body that is supported by and movable between the bottom dead center position, which is the maximum system relaxation position, and the top dead center position, which is the maximum system pick-up position; A thread holder is provided on the thread take-up body so as to intersect with the thread supply path from the thread source to the needle 17, and has a thread introduction opening opened to the outside for introducing the sewing thread, and a thread holding part is parallel to the rotational axis of the thread take-up crank 7. A sewing machine is provided with a thread take-up support body rotatably supported around a fixed axis on a sewing machine frame 1, the free end of which is rotatably connected to an intermediate portion of the thread take-up body. a direction below the drive shaft 2 from a point where the thread holding section is located at the top dead center position to a point where the thread holding section is located at the bottom dead center position;
The fixed axis is arranged so that the direction extending from the rotational axis of the balance crank 7 at the top dead center position to the fixed axis is substantially the same direction.
これによって、上糸供給源と針との間でミシン機枠の上
方に配置された糸案内と、該糸案内と針との間のミシン
機枠の上方に配置された糸道に対し、該糸道と前記糸案
内との間に配置される天秤は、前記針の上下動に同期し
て上下動し、先端は従来とは異なり、上方からの下降時
に作業者と反対方向に移動して下方位置に達すると共に
、下方からの上昇時に作業者側に移動して上方位置に達
する運動軌跡を形成する。This allows the thread guide located above the sewing machine frame between the needle thread supply source and the needle and the thread guide located above the sewing machine frame between the thread guide and the needle to A thread take-up disposed between the thread path and the thread guide moves up and down in synchronization with the up-and-down movement of the needle, and unlike conventional thread take-up levers, the tip moves in the opposite direction to the operator when descending from above. A movement trajectory is formed in which the robot reaches the lower position and moves toward the operator when rising from below to reach the upper position.
従って、上糸供給源から引き出した上糸はミシン機枠の
上部に配置された糸案内と糸道とに糸掛けし、針の糸穴
に糸通しされており、前記天秤は針上死点時には前記糸
案内と糸道より上方であって、始動・停止手段の始動信
号によりミシンモータが始動すると共に下死点からの上
昇時に先端の開口部が前記糸案内と糸道との間の上糸を
自動的に捕捉して従来と同一の天秤作用を行う。Therefore, the needle thread pulled out from the needle thread supply source is threaded through the thread guide and thread path located at the top of the sewing machine frame, and threaded through the thread hole of the needle. Sometimes, the opening at the tip is above the thread guide and the thread path, and when the sewing machine motor is started by a start signal from the start/stop means and the sewing machine motor is raised from the bottom dead center, the opening at the tip is above the thread guide and the thread path. It automatically captures the thread and performs the same thread take-up action as before.
又、前記開口部が上糸を捕捉する前の第１針目の不足上
糸については、前記糸案内と前記針との間の上糸緊張状
態を上糸検出手段が検知して不足糸の量を上糸供給装置
が供給する。Further, regarding the insufficient upper thread in the first stitch before the upper thread is captured by the opening, the upper thread detecting means detects the tension state of the upper thread between the thread guide and the needle and detects the amount of insufficient thread. is supplied by the needle thread supply device.
（実施例）
次に本発明の実施例について図面を参照して詳細に説明
する。(Example) Next, an example of the present invention will be described in detail with reference to the drawings.
第２図は本考案のミシンの機構説明図であり、４は模様
選択手段であって、模様表示が付された模様選択キー５
の操作により、所望の模様を選択するものである。FIG. 2 is an explanatory diagram of the mechanism of the sewing machine of the present invention, 4 is a pattern selection means, and a pattern selection key 5 with a pattern display attached.
The desired pattern is selected by the operation.
この選択された模様を模様表示手段６に表示する。This selected pattern is displayed on the pattern display means 6.
ミシン機枠１には駆動源（図示せず）に連結して回転を
伝達される駆動軸２が矢印Ａ方向に回転可能に支承され
ており、該駆動軸に連結する針棒３が前記ミシン機枠ｌ
に上下動可能に支承されている。A drive shaft 2 connected to a drive source (not shown) to transmit rotation is rotatably supported in the sewing machine frame 1 in the direction of arrow A, and a needle bar 3 connected to the drive shaft is connected to the sewing machine frame 1. Machine frame l
It is supported so that it can move up and down.
該針棒３の先端に針１７を固着している。A needle 17 is fixed to the tip of the needle bar 3.
駆動軸２の軸端に設けた天秤クランク７の一端に針棒ク
ランク８が固着しており、該針棒クランクの細部にクラ
ンクロッド９の一端が回転可能に嵌装している。A needle bar crank 8 is fixed to one end of a balance crank 7 provided at the shaft end of the drive shaft 2, and one end of a crank rod 9 is rotatably fitted in a detail of the needle bar crank.
該クランクロッドの他端は針棒３を挿通する針棒抱き１
０の軸部に回転可能に嵌装しており、針棒３は針棒抱き
１０の上方と下方で針棒支持体１１に上下動可能に挿通
している。The other end of the crank rod is a needle bar holder 1 through which the needle bar 3 is inserted.
The needle bar 3 is inserted into the needle bar support 11 above and below the needle bar holder 10 so as to be vertically movable.
該針棒支持体はミシン機枠ｌに固着の軸１２に嵌装し、
上下動を規制されて回転方向のみ運動可能に支持されて
いる。The needle bar support body is fitted onto a shaft 12 fixed to the sewing machine frame l,
It is supported to be movable only in the rotational direction, with vertical movement restricted.
針棒支持体１１の針棒３と反対側には連結ロッド１３の
一端が連結されており、該連結ロンドの他端はミシン機
枠１に固着の針棒振幅用ステッピングモータ１４の出力
軸に固着の腕とリンクを介して連結している。One end of a connecting rod 13 is connected to the opposite side of the needle bar support 11 from the needle bar 3, and the other end of the connecting rod 13 is connected to the output shaft of a stepping motor 14 for needle bar amplitude fixed to the sewing machine frame 1. It is connected to the fixed arm via a link.
針棒３の下方のミシン機枠１には針棒３の先端に固着の
針１７が挿通するための針穴を有する針板１８が固着さ
れている。A needle plate 18 is fixed to the sewing machine frame 1 below the needle bar 3. The needle plate 18 has a needle hole through which a needle 17 fixed to the tip of the needle bar 3 is inserted.
１９は送り歯であって、針板１８に設けた送り歯溝から
出没して布押え２０と協働してその間に保持する布を針
１７の上下動に同期して移動せしめる。Reference numeral 19 denotes a feed dog which protrudes and retracts from a feed dog groove provided in the throat plate 18 and cooperates with the cloth presser foot 20 to move the cloth held therebetween in synchronization with the vertical movement of the needle 17.
２１は針糸補足手段である釜であって、針板１８の下方
でミシン機枠１に回転可能に支承され、駆動軸２に連結
して針１７の上下動と同期して回転する下軸２２に固着
の歯車２３と釜２１の下部に一体的に固着の釜の歯車２
４とが噛合して回転を伝達されている。Reference numeral 21 denotes a hook which is a needle thread supplementing means, and is rotatably supported by the sewing machine frame 1 below the throat plate 18, and is connected to the drive shaft 2 and has a lower shaft which rotates in synchronization with the vertical movement of the needle 17. Gear 23 fixed to hook 22 and hook gear 2 fixed integrally to the bottom of hook 21
4 mesh with each other to transmit rotation.
１５は天秤であって針の上下動に同期して上下動する。15 is a balance that moves up and down in synchronization with the up and down movement of the needle.
該天秤の駆動機構について第１図を参照して説明する。The drive mechanism of the balance will be explained with reference to FIG.
１６は天秤支えであって、一端はミシン機枠ｌに固着の
天秤支え軸２５に回転可能に嵌装している。Reference numeral 16 denotes a thread take-up support, one end of which is rotatably fitted onto a thread take-up support shaft 25 fixed to the sewing machine frame l.
２６は天秤クランクビンであって、駆動軸２の軸芯から
距離αが設定されて天秤クランク７に固着されており、
該天秤クランクビンに天秤１５の一端が回転可能に嵌装
している。Reference numeral 26 denotes a balance crankbin, which is fixed to the balance crank 7 at a distance α from the axis of the drive shaft 2;
One end of a balance 15 is rotatably fitted into the balance crankbin.
該天秤の中間部にはビン３０が固着されており、該ビン
に天秤支え１６の他端が回転可能に嵌装している。A bottle 30 is fixed to the middle portion of the balance, and the other end of the balance support 16 is rotatably fitted into the bottle.
天秤１５の先端は第１図及び第３図に示す如くであって
、下方からの上昇時に上糸３１を捕捉可能な上方に開口
を有する開口部１５ａと該開口部に糸を案内する案内部
１５ｂと開口部に続いて捕捉した上糸を保持する糸穴１
５ｃとが形成されている。The tip of the thread take-up 15 is as shown in FIGS. 1 and 3, and includes an opening 15a having an opening at the top that can catch the upper thread 31 when rising from below, and a guide part that guides the thread to the opening. 15b and the thread hole 1 that holds the captured upper thread following the opening.
5c is formed.
上記の天秤駆動機構の構成は天秤支え軸２５の軸線が従
来と異なるものであって、他の上糸供給に関する各部の
構成については従来と同一である。The structure of the above-mentioned thread take-up drive mechanism is different from the conventional one in the axis of the thread take-up support shaft 25, and the structure of other parts related to needle thread supply is the same as the conventional one.
該構成による天秤１５の先端の糸穴１５ｃの運動軌跡を
第４図に示す。FIG. 4 shows the locus of movement of the thread hole 15c at the tip of the thread take-up 15 with this configuration.
図は第１図中の矢印り方向からみたものであって、第４
図中Ｂ矢方向に運動し、針１７の最上位置である針棒上
死点ではほぼａ点であって、更に駆動軸が回転した天秤
１５の糸穴１５ｃが最も上方に移動した位置す点が天秤
上死点であり、最も下方の０点が天秤下死点である。The figure is viewed from the direction of the arrow in Figure 1, and the 4th
Moving in the direction of the arrow B in the figure, the top dead center of the needle bar, which is the highest position of the needle 17, is approximately at point a, and the point is where the thread hole 15c of the thread take-up lever 15 has moved to the highest position when the drive shaft has rotated. is the balance top dead center, and the lowest 0 point is the balance bottom dead center.
該天秤上死点、及び天秤下死点の針棒上死点を０度とす
る駆動軸回転角については従来とは同一であるが、天秤
の作動範囲は従来（第５図）に比べて極めて下方で作動
すると共に、従来では下死点からの上昇時に糸穴１１５
Ｃが後方側の軌跡となるのに対し、本発明のものは上昇
時に手前側の軌跡となり、下降時に後方側の軌跡となる
。The rotation angle of the drive shaft with the needle bar top dead center at the top dead center of the take-up and the bottom dead center of the take-up taken as 0 degrees is the same as before, but the operating range of the take-up is different from the conventional one (Fig. 5). In addition to operating extremely downward, conventionally the thread hole 115 is closed when rising from the bottom dead center.
C has a trajectory on the rear side, whereas the one of the present invention has a trajectory on the near side when ascending, and a trajectory on the rear side when descending.
次に上糸の糸案内と糸道について第６図を参照して説明
する。Next, the needle thread guide and thread path will be explained with reference to FIG. 6.
３２は糸案内を兼用する公知の糸調子器であって、上糸
３１を巻装する糸コマ３３からの上糸を、その一対の糸
調子皿３４．３５の間に挟持する上糸に糸張力を付与す
る如く、ミシン機枠ｌの上部に配置されている。Reference numeral 32 denotes a known thread tension device which also serves as a thread guide, and is used to direct the upper thread from the thread spool 33 around which the upper thread 31 is wound onto the upper thread held between the pair of thread tension discs 34 and 35. It is arranged on the upper part of the sewing machine frame l so as to apply tension.
３６は糸案内カバーであって、糸調子器３２と天秤１５
との間に配置されてミシン機枠ｌに固着されており、下
方に上糸を案内するための開放部３６ａを形成している
。36 is a thread guide cover, which includes the thread tension device 32 and the thread take-up lever 15.
It is arranged between the sewing machine frame l and is fixed to the sewing machine frame l, and forms an open part 36a for guiding the needle thread downward.
ミシン機枠ｌの開放部３６ａに対向する位置には、糸調
子器３２からの上糸を糸かけするための案内壁１ａが形
成されており、該案内壁の下端には第７図の如く、糸掛
けを案内する案内部１ｂが形成されている。A guide wall 1a for threading the upper thread from the thread tension regulator 32 is formed at a position facing the open part 36a of the sewing machine frame l, and the lower end of the guide wall is as shown in FIG. , a guide portion 1b for guiding the threading is formed.
３７は糸掛はビンであって、糸案内カバー３６の下方の
開放部３６ａと対向する位置に装着されている。Reference numeral 37 denotes a thread hook, which is mounted at a position facing the opening 36a at the bottom of the thread guide cover 36.
該糸掛はビンと前記案内部１ｂとを結ぶ上糸案内位置は
、前記第４図の天秤下死点位置Ｃの先端の開口部１５ａ
よりも上方であって、天秤の上昇時に開口部１５ａが捕
捉可能な位置、例えば第４図Ｐになるように設定されて
いる。The upper thread guide position of the thread hook connecting the bottle and the guide portion 1b is the opening 15a at the tip of the thread take-up bottom dead center position C in FIG.
The opening 15a is set at a position where the opening 15a can be captured when the balance is raised, for example, at a position P in FIG. 4.
糸掛はビン３７と案内壁１ａとの間のミシン機枠１の後
方壁１ｃと案内部１ｂとの間には、天秤１５が上下動す
るためのスペース１ｄが形成されている。A space 1d for the thread take-up lever 15 to move up and down is formed between the rear wall 1c of the sewing machine frame 1 and the guide portion 1b between the thread bin 37 and the guide wall 1a.
次に本発明のミシンの糸掛は作用と、天秤の作動につい
て説明する。Next, the function of the thread hook of the sewing machine of the present invention and the operation of the thread take-up will be explained.
ミシン停止時には、前記針棒上死点位置で停止されてお
り、天秤は第４図の如く上方位置ａとなっている。When the sewing machine is stopped, the needle bar is stopped at the top dead center position, and the thread take-up is at the upper position a as shown in FIG.
糸掛けに際して、押え上げ（図示せず）を操作すると前
記糸調子器３２の一対の糸調子皿３４゜３５間の挟持圧
が解放されており、糸コマ３３から引き出された上糸３
１は一対の糸調子皿に糸掛けされる。When threading, when the presser foot lifter (not shown) is operated, the clamping pressure between the pair of thread tension plates 34 and 35 of the thread tension device 32 is released, and the needle thread 3 pulled out from the thread spool 33 is released.
1 is threaded onto a pair of thread tension discs.
次にミシン機枠１の案内壁１ａと糸案内カバー３６との
間に導き、案内部１ｂに誘導し、糸案内カバー３６の解
放部３６ａの下方から糸掛はビン３７に糸掛けされて針
１７の糸穴に糸通しする。Next, the thread is guided between the guide wall 1a of the sewing machine frame 1 and the thread guide cover 36, and guided to the guide part 1b. Thread the thread through thread hole 17.
次に押え上げの操作に続いて、ミシンの始動手段（図示
せず）の操作により、駆動軸２が回転すると、天秤１５
の先端の意と保持部（糸穴１５ｃ）は図中の矢印の如く
、上死点から後方の軌跡となって、下降し下死点位置Ｃ
となる。Next, following the operation of lifting the presser foot, when the drive shaft 2 is rotated by the operation of the starting means (not shown) of the sewing machine, the thread take-up lever 15 is rotated.
The tip and holding part (thread hole 15c) moves backward from the top dead center as shown by the arrow in the figure, and descends to the bottom dead center position C.
becomes.
次には手前側の軌跡となって上昇する。この時に糸掛け
されている上糸３１は天秤１５の先端の案内部１５ｂに
より案内され、開口部１５ａより糸穴１５ｃに侵入して
案内保持されて天秤１５による上糸の捕捉が行われる。Next, it rises in a trajectory on the near side. At this time, the threaded needle thread 31 is guided by the guide portion 15b at the tip of the thread take-up 15, enters the thread hole 15c through the opening 15a, is guided and held, and is captured by the thread take-up 15.
尚、前記天秤１５の糸保持部（糸穴Ｌ５ｃ）と開口部１
５ａは第８図のように上方に開口部２１５ａを設けた天
秤本体２１５であってもよい。In addition, the thread holding part (thread hole L5c) of the thread take-up lever 15 and the opening part 1
5a may be a balance main body 215 provided with an opening 215a at the top as shown in FIG.
また、ミシン機枠ｌのスペース１ｄに上糸３１を誘導す
るために、前記案内Ｗ、 ｌ ０１ ａに続く案内部１
０１ｂの外形形状を第９図の如く、案内壁１０１ａから
前記糸掛はビン１３７へ向かって傾斜する傾斜面を備え
た誘導外形１０１ｅを形成することで、前記糸案内カバ
ー３６の下方の開放部３６ａへの上糸３１の糸掛けを容
易化するものであってもよい。Further, in order to guide the needle thread 31 into the space 1d of the sewing machine frame l, a guide portion 1 following the guide W, l01a is provided.
As shown in FIG. 9, the outer shape of the thread guide cover 36 is formed into a guide outer shape 101e having an inclined surface that slopes from the guide wall 101a toward the bin 137, so that the lower opening of the thread guide cover 36 is formed. The needle thread 31 may be easily threaded onto the needle thread 36a.
（発明の効果）
以上のように本発明によれば、上糸供給源と針との間で
ミシン機枠の上方に配置された糸案内と、該糸案内と針
との間でミシン機枠の上方に配置された糸道と、該糸道
と前記糸案内との間に配置されて下方に開口部を形成し
、少なくとも下方からの上昇時に作業者側に移動して上
方位置に達する運動軌跡を形成する天秤とを備え、該天
秤の上昇時に前記糸案内と前記糸道に向かって上方に運
動することによって上糸吸収を達成し、下方に運動する
ことによって上糸供給を達成する天秤機構を備える如く
構成したことにより、縫い準備作業の上糸糸掛けは、上
糸供給源から引き出した上糸をミシン機枠に装着された
糸案内と糸掛はビンに糸掛は後針に糸通しすれば、ミシ
ンを始動することにより、天秤の上昇作動時に自動的に
前記糸案内と糸掛はビンとの間の上糸を捕捉して天秤作
用を行うことが出来るので、従来の如く複雑に上下位置
に配置された糸掛けに対する糸掛は作業を簡略にして容
易化することが出来る。(Effects of the Invention) As described above, according to the present invention, the thread guide disposed above the sewing machine frame between the needle thread supply source and the needle, and the thread guide disposed above the sewing machine frame between the thread guide and the needle. a thread path disposed above, and a movement disposed between the thread path and the thread guide to form an opening below, and moving toward the operator at least when rising from below to reach the upper position; and a take-up lever that forms a locus, and when the take-up is raised, it moves upward toward the thread guide and the thread path to achieve upper thread absorption, and moves downward to achieve upper thread supply. Because of the structure, the upper thread threading during sewing preparation work is carried out by pulling the upper thread out from the upper thread supply source and passing it through the thread guide attached to the sewing machine frame and the thread hook to the bin, and the thread hook to the rear needle. Once the thread is threaded, by starting the sewing machine, the thread guide and thread hook can automatically catch the upper thread between the bin and perform the thread take-up action when the thread take-up is raised. It is possible to simplify and facilitate threading work for threading threads arranged in a complicated manner in vertical positions.
該装置の天秤は、従来とは、天秤の作動時の前後位置と
高さ位置が異なるのみであって、上下位相及び天秤上糸
供給量が従来とほぼ同一であるので、従来と同じ縫いの
調整を可能とし、従来の天秤に置き換えて実行すること
が可能である。又、作業者が従来と同じ方法によって上
方の天秤に糸掛けをすることもできる。The take-up lever of this device differs from the conventional one only in the front-rear position and height position when the take-up lever is in operation, and the vertical phase and thread take-up thread supply amount are almost the same as in the conventional one, so it is possible to perform the same sewing as in the conventional one. It allows adjustment and can be implemented in place of conventional balances. Additionally, the operator can also thread the thread on the upper thread take-up using the same conventional method.
又、天秤の運動位置が従来より極めて下方とすることが
でき、ミシン機枠の上方位置を下げてコンパクトな形状
のミシンとすることができる。Furthermore, the movement position of the take-up lever can be made much lower than in the past, and the upper position of the sewing machine frame can be lowered to provide a more compact sewing machine.
第１図は本発明の天秤の駆動機構の説明図、第２図はミ
シンの機構説明図、第３図は天秤の先端形状の説明図、
第４図は本発明の天秤の運動軌跡の説明図、第５図は従
来のミシンの天秤の運動軌跡の説明図、第６図は糸掛は
機構各部の説明図、第７図は上糸案内部の説明図、第８
図は天秤先端の開放部の他の実施例の説明図、第９図は
上糸案内部の他の実施例の説明図であり、２は駆動軸、
７は天秤クランク、１５は天秤本体、１７は針、１５ｃ
は糸保持部である糸穴、１６は天秤支え、２５は固定軸
線の天秤支え軸である。Fig. 1 is an explanatory diagram of the drive mechanism of the take-up lever of the present invention, Fig. 2 is an explanatory diagram of the mechanism of the sewing machine, and Fig. 3 is an explanatory diagram of the shape of the tip of the take-up lever.
Fig. 4 is an explanatory diagram of the movement trajectory of the take-up lever of the present invention, Fig. 5 is an explanatory diagram of the movement trajectory of the take-up lever of a conventional sewing machine, Fig. 6 is an explanatory diagram of each part of the mechanism for thread hooking, and Fig. 7 is an explanatory diagram of the needle thread thread. Explanatory diagram of the guide section, No. 8
The figure is an explanatory diagram of another embodiment of the open part at the tip of the thread take-up, and FIG. 9 is an explanatory diagram of another embodiment of the upper thread guide part. 2 is a drive shaft;
7 is the balance crank, 15 is the balance body, 17 is the needle, 15c
16 is a thread take-up support, and 25 is a thread take-up support shaft having a fixed axis.
Claims (2)
最大系弛緩位置である下死点位置から最大系取上位置で
ある上死点位置への上昇時に作業者側に移動して上昇す
る天秤軌跡を備えると共に先端には上方に開口する糸保
持部が設けられた天秤と、該天秤の下死点からの上昇時
の天秤軌跡を横断する如く上糸を配置する糸案内部材と
を備えたミシンの天秤機構。(1) It is connected to the drive shaft of the sewing machine and moves up and down, and moves toward the operator when rising from the bottom dead center position, which is the maximum system relaxation position, to the top dead center position, which is the maximum system pick-up position. A thread take-up lever is provided with a thread take-up locus and a thread holding portion that opens upward at its tip, and a thread guide member that arranges the upper thread so as to cross the thread take-up locus when the thread rises from the bottom dead center of the thread take-up. The sewing machine has a thread take-up mechanism.
と、該天秤クランク上の位置であって該回転軸線から所
定の量の偏心した位置に回転可能に支持され、最大系弛
緩位置である下死点位置と最大系取上位置である上死点
位置との間において移動可能な天秤本体と、該天秤本体
の最大系弛緩位置の前後において糸供給源から針１７に
至る糸供給路と交差するように天秤本体に設けられ、縫
い糸を導入するため外方に開放した糸導入用開口を有す
る糸保持部と、前記天秤クランク７の回転軸線に平行な
ミシン機枠１上の固定軸線の周りに回動可能に支持され
、自由端が前記天秤本体の中間部に回動可能に連結され
た天秤支持体とを備えたミシンにおいて、前記固定軸線
を前記駆動軸２より下方であって、上死点位置における
前記糸保持部が位置する点から下死点位置における前記
糸保持部が位置する点に向かう方向と、上死点位置にお
ける前記天秤クランク７の回転軸線から前記固定軸線に
延びる方向とが略同じ方向になるように固定軸線を配置
したことを特徴とするミシンの天秤機構。(2) Take-up crank 7 that rotates together with the drive shaft 2 of the sewing machine
The balance is rotatably supported at a position on the crank and eccentric by a predetermined amount from the rotational axis, and has a bottom dead center position which is the maximum system relaxation position and a top dead center position which is the maximum system pick-up position. a thread take-up body that is movable between positions, and a thread take-up body provided on the thread take-up body so as to intersect with the thread supply path from the thread supply source to the needle 17 before and after the maximum system relaxation position of the thread take-up body, and for introducing sewing thread. A thread holder having an outwardly open thread introduction opening is supported rotatably around a fixed axis on the sewing machine frame 1 parallel to the rotational axis of the thread take-up crank 7, and a free end thereof is connected to the thread take-up body. In the sewing machine, the fixed axis is located below the drive shaft 2 and below the point where the thread holding section is located at the top dead center position. The fixed axis is arranged so that the direction toward the point where the thread holding section is located at the dead center position is substantially the same as the direction extending from the rotational axis of the balance crank 7 to the fixed axis at the top dead center position. A sewing machine balance mechanism characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8063490A JP2904539B2 (en) | 1990-03-30 | 1990-03-30 | Sewing machine balance mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8063490A JP2904539B2 (en) | 1990-03-30 | 1990-03-30 | Sewing machine balance mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03280988A true JPH03280988A (en) | 1991-12-11 |
| JP2904539B2 JP2904539B2 (en) | 1999-06-14 |
Family
ID=13723799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8063490A Expired - Fee Related JP2904539B2 (en) | 1990-03-30 | 1990-03-30 | Sewing machine balance mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2904539B2 (en) |
-
1990
- 1990-03-30 JP JP8063490A patent/JP2904539B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2904539B2 (en) | 1999-06-14 |
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