JPH06165888A - Fully rotating hook of sewing machine - Google Patents
Fully rotating hook of sewing machineInfo
- Publication number
- JPH06165888A JPH06165888A JP20041493A JP20041493A JPH06165888A JP H06165888 A JPH06165888 A JP H06165888A JP 20041493 A JP20041493 A JP 20041493A JP 20041493 A JP20041493 A JP 20041493A JP H06165888 A JPH06165888 A JP H06165888A
- Authority
- JP
- Japan
- Prior art keywords
- hook
- synthetic resin
- tip member
- sword tip
- outer hook
- 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
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ミシンの全回転かまに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full rotary hook of a sewing machine.
【0002】[0002]
【従来の技術】ミシンの全回転かまにおいて、外かまに
は軌溝が形成され、この軌溝に内かまの軌条が嵌り込
み、ミシンの機体に固定された内かま回り止め部材が内
かまの回り止め凹所に嵌り込んで内かまの回転が阻止さ
れた、この状態で外かまが回転駆動するように構成され
ている。2. Description of the Related Art In a full rotary hook of a sewing machine, a rail groove is formed in an outer hook, and a rail of an inner hook is fitted into the groove, and an inner hook stopper member fixed to a machine body of the sewing machine is used as an inner hook. The outer hook is rotationally driven in this state in which the inner hook is prevented from rotating by being fitted into the detent recess.
【0003】このような先行技術において、縫製速度を
向上するために外かまを高速で回転すると、上糸とその
上糸を捕える外かまの剣先との摩擦によって、上糸が外
かまの回転に追従して円滑に移動することができず、糸
切れを生じたり外かまに絡み付いたりしてしまい、外か
まを高速で回転して縫製速度を向上することができない
という問題があった。In such prior art, when the outer hook is rotated at a high speed in order to improve the sewing speed, the upper thread is rotated due to the friction between the upper thread and the tip of the outer hook which catches the upper thread. There was a problem in that it could not follow and move smoothly, thread breakage or entanglement with the outer hook, and it was not possible to rotate the outer hook at a high speed to improve the sewing speed.
【0004】[0004]
【発明が解決しようとする課題】したがって本発明の目
的は、上述の技術的課題を解決し、外かまを高速で回転
して縫製速度を向上することができるようにしたミシン
の全回転かまを提供することである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned technical problems and to provide a full rotary hook of a sewing machine which is capable of rotating the outer hook at a high speed to improve the sewing speed. Is to provide.
【0005】[0005]
【課題を解決するための手段】本発明は、金属製外かま
本体の表面を合成樹脂によって被覆し、合成樹脂製剣先
部材を着脱可能に設けたことを特徴とするミシンの全回
転かまである。According to the present invention, there is provided a full rotation of a sewing machine characterized in that the surface of a metal outer hook body is covered with a synthetic resin, and a synthetic resin sword tip member is detachably provided. .
【0006】また本発明は、剣先部材には、内かまの軌
条が嵌り込む軌溝が形成されることを特徴とする。Further, the present invention is characterized in that the sword tip member is formed with a rail groove into which the rail of the inner hook fits.
【0007】[0007]
【作用】本発明に従えば、外かまの剣先を合成樹脂によ
って構成するようにしたので、外かまを高速で回転して
もその剣先によって捕える上糸を円滑に移動させること
ができ、これによって上糸が外かまに絡み付いたり、糸
切れが生じたりすることがなくなり、外かまを高速で回
転して、縫製速度を向上することができる。According to the present invention, since the sword tip of the outer hook is made of synthetic resin, the upper thread caught by the sword tip can be smoothly moved even when the outer hook is rotated at a high speed. The upper thread is not entangled with the outer hook and the thread is not broken, and the outer hook can be rotated at a high speed to improve the sewing speed.
【0008】また本発明に従えば、外かま本体に合成樹
脂製の剣先を着脱可能に設けるようにしたので、全回転
かまの長期の使用によって上糸が摺動する外かまの剣先
が摩耗しても、容易に交換することができ、これによっ
て全回転かまの寿命を格段に向上して円滑な糸滑りで質
のよい縫い目を形成することができる。Further, according to the present invention, the sword tip made of synthetic resin is detachably provided on the outer hook body, so that the sword tip of the outer hook on which the upper thread slides is worn due to long-term use of the full rotary hook. However, it can be easily replaced, and the life of the full rotary hook can be remarkably improved, and a smooth seam can be formed to form a high-quality seam.
【0009】さらに本発明に従えば、外かま本体の表面
を合成樹脂によって被覆されるので、剣先によって捕え
られた上糸と外かまとの摺動摩擦を低減することがで
き、円滑に上糸を移動させることができる。これによっ
て糸切れなどの発生を防いで外かまを高速で回転し、縫
製速度を向上することができる。Further, according to the present invention, since the surface of the outer hook body is covered with the synthetic resin, sliding friction between the upper thread caught by the tip of the sword and the outer hook can be reduced, and the upper thread can be smoothly moved. It can be moved. As a result, the occurrence of thread breakage can be prevented, the outer hook can be rotated at a high speed, and the sewing speed can be improved.
【0010】[0010]
【実施例】図1は本発明の基礎となる構成を示す平面図
であり、図2は図1に示される垂直全回転かま1の剣先
2付近の正面図である。垂直全回転かま1は、内周面に
軌溝3が形成された外かま4と、外周面に軌溝3に嵌り
込む軌条5が形成された内かま6とを含み、内かま6内
には図示しない下糸が巻回されたボビンを収納したボビ
ンケースが着脱可能に装着される。前記外かま4は、水
平な回転軸線まわりに回転駆動される下軸7に固定され
ており、ミシンの機体に固定された図示しない内かま回
り止め部材によって内かま6が回り止めされた状態で前
記下軸7の回転によって外かま4が矢符A方向に回転駆
動され、こうして縫製動作を行うように構成されてい
る。1 is a plan view showing a basic structure of the present invention, and FIG. 2 is a front view of the vicinity of a sword tip 2 of a vertical full rotation rotary hook 1 shown in FIG. The vertical full-rotation rotary hook 1 includes an outer hook 4 having a rail groove 3 formed on the inner peripheral surface thereof, and an inner hook 6 having a rail 5 fitted on the outer peripheral surface thereof, the rail 5 being fitted in the inner hook 6. A bobbin case accommodating a bobbin wound with a bobbin thread (not shown) is detachably mounted. The outer hook 4 is fixed to a lower shaft 7 which is driven to rotate about a horizontal axis of rotation, and the inner hook 6 is prevented from rotating by an inner hook stopper member (not shown) fixed to the machine body of the sewing machine. The outer hook 4 is rotationally driven in the arrow A direction by the rotation of the lower shaft 7, and the sewing operation is performed in this manner.
【0011】前記外かま4は、剣先2を有し、この剣先
2よりも半径方向外方側にはばね8がねじ9,10によ
って固定される。この外かま2は、たとえばテフロン
(商品名)などの合成樹脂材料によつて被覆された被覆
面11(点を付して示す)が金属の表面に形成される。
この被覆面11は、いわゆるライニングまたはコーティ
ングによって形成することができる。これらのライニン
グまたはコーティングは、たとえば積層法、流動浸漬法
あるいは静電粉体気相法などの加工方法によって実現す
ることができ、その他の方法によって被覆面11を形成
するようにしてもよい。このような被覆面11を形成す
ることによって、外かま回転時に剣先2によって捕えら
れた上糸Tは、外かま回転方向A下流側に臨む摺動面1
2に沿って矢符D方向に移動していき、上糸ループを形
成する。こうして形成された上糸ループは内かま6の底
面13に沿って摺動しながら糸越しし、図示しない針の
上昇動作に伴って引上げられて縫い目を形成する。The outer hook 4 has a sword tip 2, and a spring 8 is fixed to the outer side of the sword tip 2 in the radial direction by screws 9 and 10. The outer hook 2 has a coating surface 11 (indicated by dots) coated with a synthetic resin material such as Teflon (trade name) on the metal surface.
This covering surface 11 can be formed by so-called lining or coating. These linings or coatings can be realized by a processing method such as a laminating method, a fluidized-bed method or an electrostatic powder vapor phase method, and the coated surface 11 may be formed by another method. By forming such a covering surface 11, the needle thread T caught by the sword tip 2 at the time of the outer hook rotating, the sliding surface 1 facing the outer hook rotating direction A downstream side.
It moves in the direction of arrow D along 2 to form a needle thread loop. The needle thread loop thus formed passes over the thread while sliding along the bottom surface 13 of the inner hook 6, and is pulled up in accordance with the raising operation of the needle (not shown) to form a stitch.
【0012】このような縫製動作中において、剣先2が
図1において内かま6の下方に配置されたとき、前記上
糸Tは剣先2付近の外周面に摺接するけれども、前記被
覆面11上を円滑に移動することができるので、上糸T
と被覆面11との摩擦は小さく、したがって上糸Tにむ
やみに大きな張力が生じることはない。これによって上
糸Tは外かま4の回転に追従して円滑に移動することが
できるようになり、外かま4を高速で回転することが可
能となり、縫製作業の効率を向上することができる。During such a sewing operation, when the sword tip 2 is arranged below the inner hook 6 in FIG. 1, the upper thread T slides on the outer peripheral surface near the sword tip 2, but on the covering surface 11. Since it can move smoothly, the upper thread T
The friction between the coating surface 11 and the coating surface 11 is small, and therefore, the upper thread T does not unnecessarily have a large tension. As a result, the needle thread T can move smoothly following the rotation of the outer hook 4, the outer hook 4 can be rotated at a high speed, and the efficiency of the sewing operation can be improved.
【0013】図3は本発明の一実施例の剣先部材18の
拡大斜視図であり、図4は図3の切断面線IV−IVか
ら見た断面図である。前述の実施例では、剣先2が一体
的に形成された外かま4について説明したけれども、本
実施例では外かま4の本体と剣先部材18とは別体であ
る。この剣先部材18は、合成樹脂製であり、たとえば
テフロン(商品名)あるいはフッ化樹脂から成る。この
剣先部材18は、前述の剣先2と同様に外かま回転方向
A上流側になるにつれてかま底側に傾斜した摺動面12
aが形成されるとともに、前記ねじ9,10が螺合する
ねじ孔19,20が形成される。このような剣先部材1
8は、図1の仮想線21で示される部分で前記剣先2が
切断された外かま本体を用いることによって、その外か
ま本体に前記ねじ9,10を用いて着脱可能に取付ける
ことができる。したがって剣先部材18が長期の使用に
よって摩耗したときには、その剣先部材18を別途に準
備した新たな剣先部材と容易に交換することができる。FIG. 3 is an enlarged perspective view of the sword tip member 18 according to one embodiment of the present invention, and FIG. 4 is a sectional view taken along section line IV-IV of FIG. Although the outer hook 4 integrally formed with the sword tip 2 has been described in the above embodiment, the main body of the outer hook 4 and the sword tip member 18 are separate bodies in this embodiment. The sword tip member 18 is made of synthetic resin, for example, Teflon (trade name) or fluorinated resin. The sword tip member 18 has a sliding surface 12 inclined toward the bottom of the rotary hook as it goes to the upstream side of the rotary hook rotation direction A, similarly to the above-mentioned sword tip 2.
A is formed, and screw holes 19 and 20 into which the screws 9 and 10 are screwed are formed. Such a sword tip member 1
8 can be detachably attached to the outer hook body by using the screws 9 and 10 by using the outer hook body in which the sword tip 2 is cut at a portion indicated by a virtual line 21 in FIG. Therefore, when the sword tip member 18 is worn due to long-term use, the sword tip member 18 can be easily replaced with a newly prepared sword tip member.
【0014】本発明の他の実施例として、図5に示され
るように、水平全回転かま23の剣先24に前述した被
覆面11と同様な被覆面25(点を付して示す)を形成
するようにしてもよい。このような水平全回転かま23
によってもまた、外かま27が矢符B方向に回転駆動さ
れると、剣先24によって捕えられた上糸Tを矢符26
で示される方向に沿って円滑に移動することができる。
これによって摺動面25と上糸Tとの摩擦を少なくして
円滑に糸越しすることができるので、外かま27を高速
で回転して縫製速度を向上することが可能となる。As another embodiment of the present invention, as shown in FIG. 5, a sword tip 24 of a horizontal full rotary hook 23 is provided with a coating surface 25 (shown with dots) similar to the above-mentioned coating surface 11. You may do it. Such a horizontal full rotary hook 23
Also, when the outer hook 27 is driven to rotate in the direction of arrow B, the upper thread T caught by the sword tip 24 is moved by arrow 26.
It can move smoothly along the direction indicated by.
As a result, the friction between the sliding surface 25 and the upper thread T can be reduced and the thread can be smoothly passed over, so that the outer hook 27 can be rotated at a high speed and the sewing speed can be improved.
【0015】本発明のさらに他の実施例として、鉄また
は鋼などの金属製外かまの表面全体を、前述したテフロ
ン(商品名)などのような合成樹脂によって被覆するよ
うにしてもよい。In still another embodiment of the present invention, the entire surface of the metal outer hook such as iron or steel may be covered with a synthetic resin such as Teflon (trade name) mentioned above.
【0016】[0016]
【発明の効果】本発明によれば、外かまの剣先を合成樹
脂によって構成したので、剣先とその剣先に摺動する上
糸との摩擦を可及的に少なくすることができ、これによ
って上糸にむやみに大きな張力が生じることはなく、し
たがって外かまを高速で回転しても糸切れやルーピング
などを生じない。しかも外かまを高速で回転することが
可能であるので、縫製速度を向上することができる。According to the present invention, since the sword tip of the outer hook is made of synthetic resin, the friction between the sword tip and the needle thread sliding on the sword tip can be reduced as much as possible. No large tension is generated unnecessarily on the yarn, and therefore, even if the outer hook is rotated at a high speed, yarn breakage or looping does not occur. Moreover, since the outer hook can be rotated at high speed, the sewing speed can be improved.
【0017】また本発明によれば、外かまに合成樹脂製
の剣先部材を着脱可能に設けるようにしたので、剣先部
材と上糸との接触によってその剣先部材が摩耗しても、
容易に交換することができ、これによって全回転かまを
長期にわたって使用することができる。Further, according to the present invention, since the sword tip member made of synthetic resin is detachably provided on the outer hook, even if the sword tip member is worn by the contact between the sword tip member and the upper thread,
It can be easily replaced, which allows the rotary hook to be used for a long time.
【0018】さらに本発明によれば、外かま本体の表面
が合成樹脂によって被覆されるので、剣先によって捕え
られた上糸と外かまとの摺動摩擦を低減することがで
き、円滑に上糸を移動させることができる。これによっ
て糸切れなどの発生を防いで外かまを高速で回転し、縫
製速度を向上することができる。Further, according to the present invention, since the surface of the outer hook body is covered with the synthetic resin, the sliding friction between the upper thread caught by the sword tip and the outer hook can be reduced, and the upper thread can be smoothly moved. It can be moved. As a result, the occurrence of thread breakage can be prevented, the outer hook can be rotated at a high speed, and the sewing speed can be improved.
【図1】本発明の基礎となる構成を示す平面図である。FIG. 1 is a plan view showing a basic structure of the present invention.
【図2】図1に示される垂直全回転かま1の剣先2付近
の正面図である。FIG. 2 is a front view of the vicinity of a sword tip 2 of the vertical full rotation rotary hook 1 shown in FIG.
【図3】本発明の一実施例の剣先部材18の斜視図であ
る。FIG. 3 is a perspective view of a sword tip member 18 according to an embodiment of the present invention.
【図4】図3の切断面線IV−IVから見た断面図であ
る。FIG. 4 is a sectional view taken along the section line IV-IV in FIG.
【図5】本発明のさらに他の実施例の水平全回転かま2
3を示す正面図である。FIG. 5 is a horizontal full rotary rotary hook 2 according to still another embodiment of the present invention.
It is a front view which shows 3.
1 垂直全回転かま 2,24 剣先 4,27 外かま 6 内かま 11,25 被覆面 18 剣先部材 23 水平全回転かま 1 Vertical full rotation rotary hook 2,24 Blade tip 4,27 Outer rotary hook 6 Inner rotary hook 11,25 Cover surface 18 Blade tip member 23 Horizontal full rotation rotary hook
Claims (2)
って被覆し、合成樹脂製剣先部材を着脱可能に設けたこ
とを特徴とするミシンの全回転かま。1. A full-rotation rotary hook for a sewing machine, characterized in that the surface of a metallic outer hook body is covered with a synthetic resin, and a synthetic resin sword tip member is detachably provided.
軌溝が形成されることを特徴とする請求項1記載のミシ
ンの全回転かま。2. The full rotary hook of the sewing machine according to claim 1, wherein the sword tip member is formed with a rail groove into which the rail of the inner hook fits.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5200414A JP2929445B2 (en) | 1993-07-19 | 1993-07-19 | Vertical full rotation of the sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5200414A JP2929445B2 (en) | 1993-07-19 | 1993-07-19 | Vertical full rotation of the sewing machine |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28907989A Division JPH03149089A (en) | 1989-11-06 | 1989-11-06 | Hook for sewing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06165888A true JPH06165888A (en) | 1994-06-14 |
JP2929445B2 JP2929445B2 (en) | 1999-08-03 |
Family
ID=16423926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5200414A Expired - Lifetime JP2929445B2 (en) | 1993-07-19 | 1993-07-19 | Vertical full rotation of the sewing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2929445B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010136945A (en) * | 2008-12-12 | 2010-06-24 | Janome Sewing Mach Co Ltd | Horizontal rotary hook |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5578097A (en) * | 1978-12-08 | 1980-06-12 | Toyoki Kunitake | Novel secondary structure |
JPS5897390A (en) * | 1981-12-02 | 1983-06-09 | エスエスエムシー インコーポレーテッド | Sewing yarn loop taking device having vertical axis line |
JPS5937111A (en) * | 1982-08-20 | 1984-02-29 | シ−ケ−デイ株式会社 | Method and device for boxing bottle |
JPH01268591A (en) * | 1988-04-19 | 1989-10-26 | Hirose Mfg Co Ltd | Sewing machine frame and bobbin case |
-
1993
- 1993-07-19 JP JP5200414A patent/JP2929445B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5578097A (en) * | 1978-12-08 | 1980-06-12 | Toyoki Kunitake | Novel secondary structure |
JPS5897390A (en) * | 1981-12-02 | 1983-06-09 | エスエスエムシー インコーポレーテッド | Sewing yarn loop taking device having vertical axis line |
JPS5937111A (en) * | 1982-08-20 | 1984-02-29 | シ−ケ−デイ株式会社 | Method and device for boxing bottle |
JPH01268591A (en) * | 1988-04-19 | 1989-10-26 | Hirose Mfg Co Ltd | Sewing machine frame and bobbin case |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010136945A (en) * | 2008-12-12 | 2010-06-24 | Janome Sewing Mach Co Ltd | Horizontal rotary hook |
Also Published As
Publication number | Publication date |
---|---|
JP2929445B2 (en) | 1999-08-03 |
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