JPH0693951B2 - Sewing bobbin - Google Patents
Sewing bobbinInfo
- Publication number
- JPH0693951B2 JPH0693951B2 JP2007994A JP799490A JPH0693951B2 JP H0693951 B2 JPH0693951 B2 JP H0693951B2 JP 2007994 A JP2007994 A JP 2007994A JP 799490 A JP799490 A JP 799490A JP H0693951 B2 JPH0693951 B2 JP H0693951B2
- Authority
- JP
- Japan
- Prior art keywords
- bobbin
- hook
- sewing
- thread
- stopped
- 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 - Fee Related
Links
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、ミシンのかまに関し、もつと詳しくは内かま
内に収納されるボビンの縫製動作を停止したときにおけ
る空転を防止するための構造に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary hook of a sewing machine, and more particularly to a structure for preventing idling of a bobbin housed in an inner rotary hook when a sewing operation is stopped.
従来の技術 従来から、本縫いミシンなどのベッドの下方には、たと
えば垂直全回転かまが配置され、この垂直全回転かま
は、水平な回転軸線まわりに回転駆動される外かまと、
外かま内に収納される内かまと、この内かまに着脱可能
に装着されるボビンケースと、ボビンケース内に収納さ
れるボビンとによつて、基本的に構成されている。前記
内かまの底部には、ボビンケース内に収納されたボビン
の一方のフランジが接触した状態で縫製動作に伴つてそ
のボビンに巻回されている下糸が取出されるにつれて、
そのボビンは回転軸線まわりに回転しながら下糸が引出
されるように構成されている。2. Description of the Related Art Conventionally, for example, a vertical full-rotation rotary hook is arranged below a bed of a lockstitch sewing machine, and the vertical full-rotation rotary hook has an outer rotary hook driven to rotate about a horizontal rotation axis.
Basically, the inner hook is housed in the outer hook, the bobbin case is detachably mounted in the inner hook, and the bobbin is housed in the bobbin case. At the bottom of the inner hook, as the bobbin wound on the bobbin is taken out in association with the sewing operation while one flange of the bobbin accommodated in the bobbin case is in contact,
The bobbin is constructed so that the lower thread is pulled out while rotating around the axis of rotation.
このような先行技術では、縫製動作を停止したときに、
前記ボビンは慣性によつて回転動作を継続し、これによ
つてボビンケース内で下糸が弛んだ状態となつてしま
う。したがつて工業用ミシンなどの外かまを高速で回転
するように構成されたミシンでは、縫製速度が速いため
に下糸の消費される速度が大きく、内かま内のボビンは
高速で回転することになり、このようなかまでは下糸が
半径方向外方から半径方向内方側に消費されるにつれ
て、ボビンの回転速度がより一層上昇してしまう。した
がつて縫製動作を停止するとほぼ同時にボビンの回転を
停止させることは困難であり、このようなボビンの慣性
による空転によつてボビンケース内で下糸がむやみに繰
出されると、もつれを生じたり、糸玉を生じる原因とな
つてしまう。In such a prior art, when the sewing operation is stopped,
The bobbin continues to rotate due to inertia, which causes the bobbin thread to become loose in the bobbin case. Therefore, in the sewing machine configured to rotate the outer hook at high speed such as an industrial sewing machine, the bobbin in the inner hook rotates at high speed because the bobbin thread is consumed at a high speed due to the high sewing speed. Up to this point, the rotational speed of the bobbin further increases as the bobbin thread is consumed from the radially outer side to the radially inner side. Therefore, it is difficult to stop the rotation of the bobbin almost at the same time when the sewing operation is stopped, and if the bobbin thread is unduly paid out in the bobbin case due to the idle rotation due to the inertia of the bobbin, entanglement occurs. Or it may cause a thread ball.
発明が解決しようとする課題 したがつて本発明の目的は、縫製動作が停止したときに
ボビンの空転を防止することができるようにしたミシン
のボビンおよびそれを用いたかまを提供することであ
る。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a bobbin of a sewing machine and a rotary hook using the same, which can prevent the bobbin from idling when the sewing operation is stopped. .
課題を解決するための手段 本発明は、直円筒状の巻胴部９の軸線方向両端部に固定
される一対のフランジ11,13の軸線方向外方の表面およ
び軸線方向内方の表面のみに、フツ化樹脂の被覆層15,1
6を焼付けによつて形成したことを特徴とするミシンの
ボビンである。Means for Solving the Problems According to the present invention, only the axially outer surface and the axially inner surface of the pair of flanges 11 and 13 fixed to the axially opposite ends of the straight cylindrical winding drum 9 are provided. Fluorinated resin coating layer 15,1
A bobbin of a sewing machine characterized in that 6 is formed by baking.
作用 本発明に従えば、ミシンのボビンの直円筒状の巻胴部９
には、フツ化樹脂の被覆層は形成されず、その軸線方向
両端部に固定される一対のフランジ11,13の両面、すな
わち軸線方向外方の表面および軸線方向内方の相互に対
向する表面のみに、フツ化樹脂の被覆層15,16を焼付け
によつて形成し、したがつていずれのフランジ11,13の
軸線方向外方の表面が内かまの底に接触しても、より大
きな摩擦力を得ることができ、したがつて制動力を得る
ことができ、したがつて縫製動作が停止されたときに、
ボビンの空転を防止することができる。According to the present invention, the bobbin of the bobbin of the sewing machine has a cylindrical body 9 having a cylindrical shape.
No coating layer of a fluorinated resin is formed on both surfaces of the pair of flanges 11 and 13 fixed to both ends in the axial direction, that is, the surface on the outer side in the axial direction and the surface facing each other on the inner side in the axial direction. In this case, the coating layers 15 and 16 of fluorinated resin are formed by baking, so that even if the outer surface in the axial direction of either flange 11 or 13 contacts the bottom of the inner hook, greater friction The force can be obtained, and accordingly, the braking force can be obtained, and accordingly, when the sewing operation is stopped,
It is possible to prevent the bobbin from slipping.
また本発明によれば、フランジ11,13の軸線方向内方の
表面にもまた、フツ化樹脂の被覆層15,16が形成され、
これによつて巻胴部９に巻回される下糸が円滑に供給さ
れることが可能になる。Further, according to the present invention, the coating layers 15 and 16 of fluorinated resin are also formed on the inner surfaces in the axial direction of the flanges 11 and 13.
As a result, the bobbin thread wound around the winding barrel portion 9 can be smoothly supplied.
さらに本発明によれば、巻胴部９には、前述のようにフ
ツ化樹脂の被覆層は形成されないので、その巻胴部９に
巻回された下糸が、巻胴部９をすべつてそのコイル状に
巻回された下糸と巻胴部９の外表面とが相互にすべるこ
とが防がれ、したがつて巻胴部９には下糸が確実に巻回
され、そのコイル状の下糸の形状が崩れることはなく、
これによつて下糸が確実に円滑に供給されることが可能
である。Further, according to the present invention, since the covering layer of the fluorinated resin is not formed on the winding drum portion 9 as described above, the bobbin thread wound around the winding drum portion 9 causes the winding drum portion 9 to slide smoothly. The bobbin thread wound in the coil shape and the outer surface of the winding drum section 9 are prevented from slipping with each other, so that the bobbin thread is reliably wound around the winding drum section 9, and The shape of the lower thread does not collapse,
As a result, the lower thread can be surely and smoothly supplied.
実施例 第１図は、本発明の一実施例の断面図である。外周面に
軌条１が形成された大略的に直円筒状の筒部２と、この
筒部２の軸線方向一端部に垂直に連なる底部３とによつ
て内かま４が形成され、この内かま４の底部３には、開
口端側に向けてスタツド５が立設される。このような内
かま４には、ボビンケース６が着脱可能に装着され、こ
のボビンケース６内には本発明に従うボビン７が収納さ
れる。このボビン７は、前記スタツド５が挿通する直円
筒状の巻胴部９と、この巻胴部９の軸線方向両端部に固
定される一対のフランジ11,13とを有する。これらのフ
ランジ11,13間には、半径方向内方側から半径方向外方
側にわたつて下糸14が巻回されており、縫製動作が行わ
れるにつれて半径方向外方側から内方側にわたつて消費
されていく。したがつてボビン７は、下糸14が消費され
るにつれてその回転速度は上昇する。このようなボビン
７の各フランジ11,13の表面には、被覆層15,16が形成さ
れる。Embodiment FIG. 1 is a sectional view of an embodiment of the present invention. An inner rotary hook 4 is formed by a substantially straight cylindrical tubular portion 2 having a rail 1 formed on the outer peripheral surface thereof, and a bottom portion 3 which is vertically connected to one axial end of the tubular portion 2. A stud 5 is erected on the bottom portion 3 of the opening 4 toward the opening end side. A bobbin case 6 is detachably attached to the inner hook 4 as described above, and a bobbin 7 according to the present invention is housed in the bobbin case 6. The bobbin 7 has a right-cylindrical winding barrel 9 through which the stud 5 is inserted, and a pair of flanges 11 and 13 fixed to both axial ends of the winding barrel 9. A bobbin thread 14 is wound between the flanges 11 and 13 from the radially inner side to the radially outer side, and from the radially outer side to the inner side as the sewing operation is performed. It is consumed over time. Therefore, the rotation speed of the bobbin 7 increases as the lower thread 14 is consumed. Coating layers 15 and 16 are formed on the surfaces of the respective flanges 11 and 13 of the bobbin 7.
この被覆層15は、たとえばフツ化樹脂材料から成り、好
ましくは下記の一般式によつて示されるポリテトラフル
オロエチレン（商品名テフロン）が用いられる。The coating layer 15 is made of, for example, a fluorinated resin material, and preferably polytetrafluoroethylene (trade name Teflon) represented by the following general formula is used.
CF2−CF2 ｎ …（１） ただし、ｎは正の整数である。 CF 2 -CF 2 n ... (1 ) where, n is a positive integer.
このテトラフルオロエチレンは、一般的に白色ろう状の
熱可塑性樹脂であつて、分子量が400万〜1000万と大き
く、高い溶融粘度を示す。また−100℃から260℃までの
高範囲の温度で使用することができ、溶融アルカリ金属
ならびに高温化フツ素ガス以外のすべての酸、アルカ
リ、溶剤に耐える。This tetrafluoroethylene is generally a white waxy thermoplastic resin, has a large molecular weight of 4 to 10 million, and exhibits a high melt viscosity. It can be used in a high temperature range from -100 ° C to 260 ° C and withstands all acids, alkalis and solvents other than molten alkali metal and elevated temperature fluorine gas.
このようなフツ化樹脂から成る被覆層15をたとえば焼付
けなどによつて形成することによつて、縫製時における
ボビン７の回転時には内かま４に対して動摩擦係数が小
さく、また縫製動作が停止したときには、内かま４との
摺動摩擦によつてほぼ同時に回転動作を停止する。これ
によつて縫製時に下糸を好ましい張力で取出すことがで
きるとともに、縫製動作停止時においては、ボビン７の
空まわりを防止して、下糸４の不所望な繰出しを防ぐこ
とができる。また底部３の開放端側に臨む表面と被覆層
15との間に比較的軽い潤滑油の油膜を形成することによ
つて、底部３に対向するフランジ11の表面が、その油膜
の粘着力によつて底部３に微少な力でいわば吸着された
状態となり、これによつてより一層効果的にボビン７に
制動力を作用させることができる。しかも一般に、ボビ
ン７は鉄またはステンレス鋼製であるために合成樹脂な
どに比べて比重が比較的大きく、慣性力が大きい。した
がつて、たとえばボビンケース６にボビン７を内かまの
軸線方向底部側に付勢するばね18を設けてそのボビン７
を底部３に近接する方向に弾発的に付勢することによつ
て、縫製動作を停止したときにおけるボビン７に作用す
る制動力をぼね付勢しない場合に比べてより一層大きく
することができ、これによつて直径の大きなボビン７で
あつても制動力を確実に作用させて空転を防ぐことがで
きる。By forming the coating layer 15 made of such a fluorinated resin by, for example, baking, the dynamic friction coefficient is small with respect to the inner hook 4 during rotation of the bobbin 7 during sewing, and the sewing operation is stopped. At times, due to the sliding friction with the inner hook 4, the rotating operation is stopped almost at the same time. As a result, the bobbin thread can be taken out with a preferable tension at the time of sewing, and when the sewing operation is stopped, the bobbin 7 can be prevented from idling and the bobbin thread 4 can be prevented from being undesirably fed out. In addition, the surface of the bottom portion 3 facing the open end and the coating layer
By forming an oil film of relatively light lubricating oil between the surface of the flange 11 and the surface of the flange 11, the surface of the flange 11 facing the bottom 3 was adsorbed to the bottom 3 by a slight force due to the adhesive force of the oil film. Then, the braking force can be applied to the bobbin 7 more effectively. Moreover, since the bobbin 7 is generally made of iron or stainless steel, it has a relatively large specific gravity and a large inertial force as compared with synthetic resin. Therefore, for example, the bobbin case 6 is provided with a spring 18 for urging the bobbin 7 toward the bottom side in the axial direction of the inner hook.
By elastically urging the hook in the direction approaching the bottom portion 3, it is possible to further increase the braking force acting on the bobbin 7 when the sewing operation is stopped, as compared with the case where the urging force is not applied. Therefore, even with the bobbin 7 having a large diameter, the braking force can be surely applied to prevent the idling.
本発明の他の実施例として、前記被覆層15、16と同様な
被覆層を内かま４の底部３の開放端側の表面に形成し
て、前述した各フランジ11,13に被覆層15,16が形成され
たボビン７を収納するようにしてもよい。このような構
成によつて、縫製時に前記内かま４とボビン７との動摩
擦係数を小さくし、ボビン７を内かま４内で円滑に回転
させ、縫製動作停止時には内かま４とボビン７との摺動
摩擦力によつてそのボビン７に制動力を作用させ、ボビ
ン７の空まわりをより一層確実に防止することができ
る。As another embodiment of the present invention, a coating layer similar to the coating layers 15 and 16 is formed on the surface of the bottom 3 of the inner hook 4 on the open end side, and the coating layers 15 and 13 are formed on the flanges 11 and 13 described above. You may make it accommodate the bobbin 7 in which 16 was formed. With this structure, the coefficient of dynamic friction between the inner hook 4 and the bobbin 7 is reduced during sewing, the bobbin 7 is smoothly rotated in the inner hook 4, and the inner hook 4 and the bobbin 7 are stopped when the sewing operation is stopped. A braking force is applied to the bobbin 7 by the sliding frictional force, so that the bobbin 7 can be prevented from spinning around more reliably.
さらに本発明の他の実施例として、前述した被覆層15,1
6は、ポリテトラフルオロエチレンに代えて、四フツ化
六フツ化エチレン共重合体を用いるようにしてもよい。Further, as another embodiment of the present invention, the above-mentioned coating layers 15 and 1
For 6, polytetrafluoroethylene may be replaced with a tetrafluorohexahexafluoroethylene copolymer.
発明の効果 本発明によれば、ボビンをフツ化樹脂によつて被覆する
ようにしたので、このボビンが収納される内かまとのい
わば動摩擦係数を小さくすることができるので、縫製動
作時には内かま内のボビンを円滑に回転させることがで
き、縫製動作停止時には、ボビンの回転を迅速に停止し
て空まわりを防止することができる。According to the present invention, since the bobbin is covered with the fluorinated resin, it is possible to reduce the so-called dynamic friction coefficient of the inner hook in which the bobbin is housed, so that the inner hook during the sewing operation. The inner bobbin can be smoothly rotated, and when the sewing operation is stopped, the bobbin can be quickly stopped to prevent idle rotation.
特に本発明によれば、一対のフランジ11,13の軸線方向
外方の表面および軸線方向内方の表面のみに、フツ化樹
脂の被覆層15,16を、焼付けによつて形成したので、ボ
ビンのいずれのフランジ11,13の軸線方向外方の表面が
内かまの底に接触しても、希望する摩擦力を得ることが
でき、これによつて制動力が得られ、ボビンの慣性によ
る空転を防ぐことができる。Particularly according to the present invention, since the coating layers 15 and 16 of the fluorinated resin are formed by baking only on the axially outer surface and the axially inner surface of the pair of flanges 11 and 13, the bobbin is formed. Even if the axially outer surface of any of the flanges 11 and 13 contacts the bottom of the inner hook, the desired frictional force can be obtained, which provides the braking force and the idling due to the inertia of the bobbin. Can be prevented.
また本発明によれば、フランジ11,13の軸線方向内方の
表面にフツ化樹脂の被覆層が形成されるので、下糸がそ
の表面に低い摩擦力で接触して円滑に下糸が供給される
ことができる。Further, according to the present invention, since the coating layer of the fluorinated resin is formed on the inner surfaces of the flanges 11 and 13 in the axial direction, the lower thread is brought into contact with the surface with a low frictional force to smoothly supply the lower thread. Can be done.
さらに本発明によれば、巻胴部９にはフツ化樹脂の被覆
層は形成されないので、コイル状に巻回されている下糸
と巻胴部９の外表面とが相互にすべつてしまうことが防
がれ、これによつてコイル状の下糸の形状が崩れること
なく、巻胴部９に巻回されたままの状態を保つことがで
きる。これによつて下糸がからまることなく、巻胴部９
から円滑にかつ確実に供給されることができる。Further, according to the present invention, since the covering layer of the fluorinated resin is not formed on the winding drum portion 9, the bobbin thread wound in a coil shape and the outer surface of the winding drum portion 9 may slip on each other. This prevents the shape of the coiled bobbin thread from being broken, and the state of being wound around the winding barrel 9 can be maintained. As a result, the bobbin thread 9
Can be supplied smoothly and surely.
第１図は本発明の一実施例の断面図、第２図は内かま４
の正面図である。 ３……底部、４……内かま、７……ボビン、15,16……
被覆層FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is an inner hook 4
FIG. 3 …… bottom, 4 …… inner, 7 …… bobbin, 15,16 ……
Coating layer
Claims (1)
定される一対のフランジ11,13の軸線方向外方の表面お
よび軸線方向内方の表面のみに、フツ化樹脂の被覆層1
5,16を焼付けによつて形成したことを特徴とするミシン
のボビン。1. A fluorinated resin coating only on the axially outer surface and axially inner surface of a pair of flanges 11 and 13 fixed to both axial end portions of a straight cylindrical winding drum portion 9. Tier 1
A bobbin of a sewing machine characterized in that 5,16 are formed by baking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007994A JPH0693951B2 (en) | 1990-01-16 | 1990-01-16 | Sewing bobbin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007994A JPH0693951B2 (en) | 1990-01-16 | 1990-01-16 | Sewing bobbin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03212289A JPH03212289A (en) | 1991-09-17 |
| JPH0693951B2 true JPH0693951B2 (en) | 1994-11-24 |
Family
ID=11680957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007994A Expired - Fee Related JPH0693951B2 (en) | 1990-01-16 | 1990-01-16 | Sewing bobbin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0693951B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0693950B2 (en) * | 1990-01-16 | 1994-11-24 | 株式会社▲廣▼瀬製作所 | Sewing machine bite |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0693950B2 (en) * | 1990-01-16 | 1994-11-24 | 株式会社▲廣▼瀬製作所 | Sewing machine bite |
-
1990
- 1990-01-16 JP JP2007994A patent/JPH0693951B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03212289A (en) | 1991-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0693951B2 (en) | Sewing bobbin | |
| US5855328A (en) | Spinning reel with bushing for supporting spool shaft | |
| US4932200A (en) | Rotary ring for spinning machinery | |
| JPH03212288A (en) | Bobbin cylinder for sewing machine | |
| US1846524A (en) | Bobbin | |
| US2331240A (en) | Strand handling apparatus | |
| US4063689A (en) | Releasable coupling device | |
| US3315909A (en) | Reel lock | |
| US2254606A (en) | Spool bobbin | |
| JPH03115064A (en) | Rewinding device | |
| KR102513785B1 (en) | Tension knob separation prevention reel | |
| JPH10286387A (en) | Bobbin, bobbin case, and inner hook of fully rotary kettle | |
| JPS6320677Y2 (en) | ||
| US4354642A (en) | Package support apparatus for forming a creeling tail | |
| US2695757A (en) | Machine for winding thread | |
| JPS605006Y2 (en) | Automatic yarn guiding device for waxing device in spinning machine | |
| JPH0245247Y2 (en) | ||
| US1299612A (en) | Attachment for moving-picture machines. | |
| US371827A (en) | Sachusetts | |
| SU1442492A1 (en) | Device for winding yarn onto conical bobbin | |
| JPH0532074Y2 (en) | ||
| JPH0558759B2 (en) | ||
| JPH0316471Y2 (en) | ||
| JPH0671Y2 (en) | Vertical full rotary hook | |
| JP2674637B2 (en) | Vertical full rotation kettle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |