JPH0525587Y2 - - Google Patents
Info
- Publication number
- JPH0525587Y2 JPH0525587Y2 JP1987049354U JP4935487U JPH0525587Y2 JP H0525587 Y2 JPH0525587 Y2 JP H0525587Y2 JP 1987049354 U JP1987049354 U JP 1987049354U JP 4935487 U JP4935487 U JP 4935487U JP H0525587 Y2 JPH0525587 Y2 JP H0525587Y2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- needle
- needle thread
- take
- loop
- 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 - Lifetime
Links
- 238000009958 sewing Methods 0.000 claims description 7
- 230000002411 adverse Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 239000005060 rubber Substances 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
この考案は天秤と針との間の上糸に作用し、針
降下時に上糸が必要量以上針に供給されないよう
にするミシンの上糸保持具に関する。[Detailed description of the invention] Industrial application field This invention is an upper thread holder for sewing machines that acts on the upper thread between the thread take-up and the needle to prevent more than the necessary amount of upper thread from being supplied to the needle when the needle is lowered. Regarding.
考案の背景
縫い目はよく知られるように、針が下死点より
上昇するときに形成される上糸ループを釜の剣先
が捕捉して牽引し、釜をくヾらせることによつて
形成されるが、針孔を通して必要量以上の上糸が
供給されるいわゆる流れ込み現象を生じ、過大な
上糸ループが形成されると、糸の種類にもよるが
上糸ループが捩れたり倒れたりしがちとなり、そ
のため釜の剣先が上糸ループを捕捉し損うことが
あり、縫い目に目飛びを生じる一因となつてい
た。こうした目飛び現象はとくにジグサグ縫いで
送り量を小さくしたとき左側の縫い目形成時に起
り易い。Background of the invention As is well known, the stitch is formed by the point of the hook catching and pulling the needle thread loop formed when the needle rises from the bottom dead center, causing the hook to collapse. However, if a so-called run-in phenomenon occurs in which more needle thread than the required amount is supplied through the needle hole, and an excessive needle thread loop is formed, the needle thread loop tends to twist or fall, depending on the type of thread. As a result, the tip of the hook sometimes fails to catch the needle thread loop, which is one of the causes of skipped stitches. This skipped stitch phenomenon is particularly likely to occur when forming a left-hand stitch when the feed amount is small in zig-sag stitching.
過大な上糸ループが形成されるとまた目飛びの
ほかに糸切れを生ずる原因ともなる。すなわち上
糸ループが必要以上に大きくなると、第３Ａ〜Ｃ
図に示されるように、中釜ａの剣先ｂがループｃ
を掬つて大釜ｄのレース溝端に達したとき弛んだ
ループｃがレース溝に入り込んで中釜と大釜との
間に挟まれて切られたり、或いはまた第４Ａ，Ｂ
図に示されるように、中釜ａをくヾり抜けたルー
プｃが中釜尾端ｅとドライバー後端ｆとの間より
抜け切らず、中釜ａが逆転するとき中釜尾端ｅと
大釜ｄのレース溝端との間に挟まれて切られたり
しがちとなる。 If an excessively large needle thread loop is formed, it may cause not only skipped stitches but also thread breakage. In other words, if the needle thread loop becomes larger than necessary,
As shown in the figure, the tip b of the inner pot a is connected to the loop c.
When the loop C reaches the end of the race groove of the cauldron d, the loose loop c enters the race groove and gets caught between the inner pot and the cauldron and is cut.
As shown in the figure, the loop c that has passed through the inner hook a does not pass through between the inner hook tail end e and the rear end f of the driver, and when the inner hook a is reversed, the inner hook tail end e and the large hook d It tends to get caught and cut between the race groove and the edge of the race groove.
糸の流れ込みを防止するために天秤と針との間
の上糸経路上に弱いバネ圧を糸に付与する糸案内
を設けることが考えられるが、この場合針下降時
において糸が必要量以上針孔に流れ込むことを抑
制することはできても針上昇時にはこれにより余
分な抵抗が加えられるため上糸ループが中釜から
抜けるタイミングに悪い影響を与え、第４Ａ，Ｂ
図に示されるような糸切れ現象を生じ易い。 In order to prevent the thread from flowing into the needle, it is possible to install a thread guide that applies weak spring pressure to the thread on the upper thread path between the thread take-up lever and the needle, but in this case, when the needle is lowered, the thread does not exceed the required amount. Even if it is possible to suppress the flow into the hole, this adds extra resistance when the needle rises, which adversely affects the timing at which the upper thread loop comes out of the hook, and
Thread breakage phenomenon as shown in the figure is likely to occur.
この考案はループが中釜から抜けるタイミング
に悪い影響を与えることなく針に必要以上の上糸
が流れ込まないようにし、以つて適正な上糸ルー
プが形成されるようにして目飛びや糸切れを防止
しようとするものである。 This idea prevents needle thread from flowing into the needle more than necessary without adversely affecting the timing at which the loop comes out of the hook, and prevents skipped stitches and thread breakage by forming a proper needle thread loop. This is what we are trying to prevent.
考案の概要
本案はそのため天秤と針との間の上糸経路上に
柔軟性を有し、少くとも針が降下して天秤による
糸弛めが行われる時に上糸の供給源側に反つて上
糸に凭れ、上糸を軽く押えるシート状の上糸保持
具を設けたものである。Summary of the invention Therefore, this invention has flexibility on the needle thread path between the thread take-up thread take-up and the needle, and at least when the needle descends and the thread thread take-up is loosened, A sheet-shaped needle thread holder is provided that leans against the thread and lightly presses the needle thread.
上糸保持具は例えば、皮革、合成皮革、ゴム、
布、プラスチツクシート等よりなるもので、一端
が固定されて自由端がミシンの部材にもたれるよ
うにされるか或いは一対の糸保持具を向い合せに
して突き合せ、互いに凭れ合うようにされる。上
糸保持具はまた天秤が上下動する一般のタイプの
ミシンに使用することもできるし、天秤が水平に
往復動するタイプのミシンにも使用することがで
きる。後者のタイプのミシンにおいては上糸保持
具を天秤が往復動する経路上に設けることができ
る。したがつてこの場合、天秤と針との間とは天
秤を含むものとなる。 The needle thread holder is made of, for example, leather, synthetic leather, rubber,
It is made of cloth, plastic sheet, etc., and either one end is fixed and the free end rests against a member of the sewing machine, or a pair of thread holders are placed facing each other and butted against each other so that they rest against each other. The needle thread holder can also be used in a general type of sewing machine in which the thread take-up lever moves up and down, or it can be used in a type of sewing machine in which the thread take-up thread reciprocates horizontally. In the latter type of sewing machine, an upper thread holder can be provided on the path along which the thread take-up reciprocates. Therefore, in this case, the term "between the balance and the needle" includes the balance.
実施例
第１，２図に示す実施例は本出願人がさきに実
願昭60−174622号等により提案したタイプの天秤
装置、すなわち断面がコ字形の天秤カバー１内を
天秤２が上軸に連動して水平に往復動し、往動時
において天秤カバー１に縦設されるガイド溝５に
通される上糸４を捕捉して水平にＶ状に牽引し、
復動時にそれを解放するタイプの天秤装置に皮製
のシート状切片よりなる長方形の上糸保持具７を
設けた例を示すもので、上糸保持具７は上部が天
秤カバー１の上壁部１ａに取付けられて垂れ下が
り、下部が下壁部１ｂ上面に凭れるようにしてあ
る。図中８は糸調子器である。Embodiment The embodiment shown in FIGS. 1 and 2 is a balance device of the type previously proposed by the present applicant in Utility Application No. 174622/1980, etc., that is, a balance 2 is mounted on the upper shaft inside a balance cover 1 having a U-shaped cross section. It reciprocates horizontally in conjunction with the thread take-up lever 1, and during forward movement, it catches the needle thread 4 passing through the guide groove 5 vertically installed in the thread take-up cover 1 and pulls it horizontally in a V-shape.
This shows an example in which a rectangular needle thread holder 7 made of a sheet-like section made of leather is installed in a type of thread take-up device that releases the thread take-up during backward movement. It is attached to part 1a and hangs down, so that its lower part rests on the upper surface of lower wall part 1b. 8 in the figure is a thread tension device.
本実施例は以上のように構成され、往動時にお
いて天秤２は上糸４を捕捉し、そのまゝ上糸保持
具７をくゞり抜けて上糸を牽引する。天秤２が
くゞり抜けた上糸保持具７は第１図に示されるよ
うに、くゞり抜けた天秤側すなわち図の右方に反
つた状態となるが、往動時において上糸４は糸保
持具７の反つた方向に移動するため糸保持具７に
よる押え作用をほとんど受けることがない。した
がつて上糸４は抵抗をほとんど受けることなく上
糸保持具下部を摺接し、上糸保持具７を設けたこ
とによつて上糸ループが中釜から抜けるタイミン
グなど縫い目形成に悪影響を与えることがない。
天秤２が往動端に達して復動すると、牽引されて
いた上糸４が解放され、これにより天秤カバー１
内に形成される弛んだ上糸４のループ４ａは針
（図示省略）が降下するのに伴い引張られ引き出
されるが、この際右方に反る上糸保持具で上糸が
軽く押えられ、その結果針への上糸の供給量が抑
制され、上糸ループ形成時に必要以上の上糸が供
給されないようになる。なお上糸保持具７は天秤
２が復動する途上において上糸保持具７に接触
し、それをくゞり抜けたとき反対側すなわち図の
左方に反り返るようなことがあるが、反り返つて
糸への押え作用が生じなくなつてもこの時点では
既に釜の剣先が上糸ループを捕捉し終つているた
め何ら問題を生じることはない。また上糸保持具
は一時的に左方に反り返るようなことがあつても
天秤の往動時には再び右方に反り返り元に戻され
る。 The present embodiment is constructed as described above, and during forward movement, the thread take-up 2 captures the upper thread 4, passes through the upper thread holder 7 as it is, and pulls the upper thread. As shown in FIG. 1, the needle thread holder 7 that has passed through the thread take-up 2 is in a state of being warped toward the thread take-up side where it has passed through, that is, to the right in the figure. Since it moves in the warped direction of the thread holder 7, it is hardly subjected to any pressing action by the thread holder 7. Therefore, the needle thread 4 slides into contact with the lower part of the needle thread holder with almost no resistance, and the provision of the needle thread holder 7 adversely affects seam formation, such as the timing at which the needle thread loop comes out of the hook. Never.
When the thread take-up 2 reaches the forward movement end and moves back, the needle thread 4 that has been being pulled is released, and the thread take-up cover 1 is thereby released.
The loose loop 4a of the needle thread 4 formed inside is pulled and pulled out as the needle (not shown) descends, but at this time, the needle thread is lightly held down by the needle thread holder that curves to the right. As a result, the amount of needle thread supplied to the needle is suppressed, and more needle thread than necessary is prevented from being supplied when forming a needle thread loop. Note that the upper thread holder 7 may come into contact with the upper thread holder 7 during the backward movement of the thread take-up lever 2, and when it passes through it, it may warp to the opposite side, that is, to the left in the figure. Even if the holding action on the heap thread ceases to occur, no problem will occur because at this point the tip of the hook has already captured the upper thread loop. Furthermore, even if the upper thread holder temporarily warps to the left, it will warp to the right again and return to its original position when the thread take-up moves forward.
考案の効果
本考案によれば、天秤による糸弛めが行われ、
針の降下に伴つて上糸が供給されるとき、上糸保
持具が上糸にもたれかゝつて上糸を軽く押えるた
め、上糸の供給が抑制され、その結果必要以上の
上糸が供給されるようなことがなくなり、適正な
上糸ループが形成されて糸の流れ込みによる目飛
びや糸切れを解消することができる。しかも釜を
くゞり抜けた上糸ループを引上げるときには上糸
保持具は押え作用を与えないためこれを設けたこ
とによつて上糸ループが中釜から抜けるタイミン
グに悪い影響が与えられることもない。また、糸
保持具はシート状であるため、構造が簡単で、取
付けも容易であり、取付けに要するスペースも少
なくてすむほか、上糸への接触面積も少なくてす
み、しかも天秤とはその往復動経路のうちの一部
でしか接触しないため、上糸の毛羽毛立ちも少な
くすることができる。Effects of the invention According to the invention, thread loosening is performed using a thread take-up,
When the needle thread is fed as the needle descends, the needle thread holder leans against the needle thread and lightly presses the needle thread, which suppresses the needle thread supply, resulting in the supply of more needle thread than necessary. A proper upper thread loop is formed, and skipped stitches and thread breakage due to thread flow can be eliminated. Moreover, when pulling up the needle thread loop that has passed through the hook, the needle thread holder does not provide a holding action, so providing this device has a negative effect on the timing at which the needle thread loop comes out from the hook. Nor. In addition, since the thread holder is sheet-shaped, it has a simple structure, is easy to install, requires less space for installation, and has less contact area with the upper thread. Since contact occurs only in a part of the moving path, fluffing of the upper thread can also be reduced.
第１図は天秤カバーの一部を切欠いたミシン要
部機構の正面図、第２図は同平面図、第３Ａ〜Ｃ
図はループを捕捉する際に生ずる糸切れ時の説明
図、第４Ａ，Ｂ図はループが抜け出す際に生ずる
糸切れ時の説明図である。
１……天秤カバー、２……天秤、４……上糸、
７……上糸保持具。
Figure 1 is a front view of the main mechanism of the sewing machine with a part of the thread take-up cover cut away, Figure 2 is a plan view of the same, and Figures 3A to C
The figure is an explanatory diagram of yarn breakage that occurs when the loop is caught, and Figures 4A and 4B are explanatory diagrams of the yarn breakage that occurs when the loop is pulled out. 1... Balance cover, 2... Balance, 4... Needle thread,
7...Needle thread holder.
Claims (1)
ト状で柔軟性を有し、針が降下して天秤による糸
弛めが行われるときに上糸の供給源側に反つて上
糸にもたれ、上糸を軽く押えるミシンの上糸保持
具。 It is placed on the needle thread path between the needle thread take-up and the thread take-up, and is flexible in the form of a sheet, and when the needle descends and the thread thread take-up is loosened, the needle thread is moved against the needle thread supply source side. A needle thread holder for sewing machines that you can lean against and lightly press down on the needle thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987049354U JPH0525587Y2 (en) | 1987-03-31 | 1987-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987049354U JPH0525587Y2 (en) | 1987-03-31 | 1987-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63153982U JPS63153982U (en) | 1988-10-11 |
| JPH0525587Y2 true JPH0525587Y2 (en) | 1993-06-28 |
Family
ID=30871729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987049354U Expired - Lifetime JPH0525587Y2 (en) | 1987-03-31 | 1987-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0525587Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706642B (en) * | 2019-02-27 | 2021-03-12 | 杰克缝纫机股份有限公司 | Control mechanism for eliminating needle thread on fabric and sewing machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59108580U (en) * | 1983-01-14 | 1984-07-21 | アイシン精機株式会社 | Sewing machine take-up thread guide device |
| JPH0131169Y2 (en) * | 1985-03-11 | 1989-09-25 |
-
1987
- 1987-03-31 JP JP1987049354U patent/JPH0525587Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63153982U (en) | 1988-10-11 |
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