JPH0517030Y2 - - Google Patents
Info
- Publication number
- JPH0517030Y2 JPH0517030Y2 JP1988011797U JP1179788U JPH0517030Y2 JP H0517030 Y2 JPH0517030 Y2 JP H0517030Y2 JP 1988011797 U JP1988011797 U JP 1988011797U JP 1179788 U JP1179788 U JP 1179788U JP H0517030 Y2 JPH0517030 Y2 JP H0517030Y2
- Authority
- JP
- Japan
- Prior art keywords
- tension
- adjustment
- plate
- thread tension
- thread
- 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
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、糸まきと縫い機構との間に配設さ
れて縫い機構にいたる糸の張力を調節するための
糸張力調節装置に関するものである。[Detailed description of the invention] [Industrial field of application] This invention relates to a thread tension adjustment device disposed between a thread winder and a sewing mechanism to adjust the tension of the thread leading to the sewing mechanism. be.
糸張力調節装置にあつては、厚地やロツクの全
巻縫い等の場合のように特に強い張力を必要とす
る場合にそなえ、別個に専用の張力調節装置を設
ける場合がある。しかしながら、別個専用の張力
調節装置を設けると生産コストがかさむうえ、糸
かけ操作も煩雑になるうえ、外観上の美観を損な
うという問題を生じる。
As for the thread tension adjustment device, a separate dedicated tension adjustment device may be provided in cases where a particularly strong tension is required, such as when sewing thick fabrics or full-length locks. However, providing a separate dedicated tension adjustment device increases production costs, complicates threading operations, and impairs the aesthetic appearance.
そこで、一定の場合に特に強い張力を必要とす
る場合、すなわち、第６図のグラフに示す張力特
性（バネ特性）を得るために、第５図に示す形状
のバネが、糸調子皿を押圧するための押圧バネと
して使用されている。 Therefore, when a particularly strong tension is required in a certain case, that is, in order to obtain the tension characteristics (spring characteristics) shown in the graph of FIG. 6, a spring having the shape shown in FIG. It is used as a pressure spring for
このバネを使用すると、第６図のグラフに示す
ように、調節つまみの回転が一定値を超えると糸
張力を急激に高まり、必要な縫製作業に適応しう
ることになる。 When this spring is used, as shown in the graph of FIG. 6, when the rotation of the adjustment knob exceeds a certain value, the thread tension is rapidly increased, making it possible to adapt to the required sewing work.
しかしながら、グラフから明らかなように、糸
張力が格別に強くなる範囲y1〜y3に対応する調節
つまみの回転数範囲、すなわち張力調節範囲は非
常に狭くなり、このため調節つまみの僅かな回転
で糸の張力が大きく変化して、厚地やロツクの全
巻縫いなど強い糸張力を必要とする場合、微妙な
張力調節が困難となるという問題が生じている。 However, as is clear from the graph, the rotation speed range of the adjustment knob corresponding to the range y 1 to y 3 where the thread tension is particularly strong, that is, the tension adjustment range, is very narrow, and therefore, even a slight rotation of the adjustment knob This causes a problem in that the tension of the thread changes greatly, making it difficult to finely adjust the tension when a strong thread tension is required, such as when sewing thick fabrics or full-length locks.
この考案は、糸張力調節装置において、糸調子
皿とこれを押圧して糸を挾持させるための押圧バ
ネとの間に張力切換え機構を介装し、この張力切
り換え機構を複数の突起を有する移動板と、これ
らの突起を嵌合する複数の受け部を有する切換え
板で構成することにより上記従来の問題点を解決
しようとするものである。
In this invention, in a thread tension adjustment device, a tension switching mechanism is interposed between a thread tension disc and a pressure spring for pressing the disc and pinching the thread, and this tension switching mechanism is moved by a movable member having a plurality of protrusions. The present invention attempts to solve the above-described conventional problems by constructing a switching plate having a plate and a plurality of receiving portions into which these protrusions fit.
この考案に係る糸調節装置において、押圧バネ
と糸調子皿との間に、複数の突起を有する移動板
とこれらの突起を嵌合する受け部を有する切換え
板とで構成される張力切換え機構を設けたため
に、糸張力を強弱二段階に切換えしかも各段階に
おいて広い範囲で張力調節を行なうことができ
る。
In the thread adjustment device according to this invention, a tension switching mechanism comprising a moving plate having a plurality of projections and a switching plate having a receiving portion into which these projections fit is provided between the pressure spring and the thread tension disc. Because of this provision, the thread tension can be switched to two levels, strong and weak, and the tension can be adjusted within a wide range at each level.
すなわち、移動板の突起が切換え板の受け部に
嵌合している場合には、通常の押圧力をもつて糸
調子皿に作用し、突起が受け部に嵌合していない
場合には、押圧バネは突起の高さ分だけ常時押圧
され、この状態で、調節つまみによる調節許容範
囲で張力を調節できるので強い張力段階でも広い
範囲にわたり張力の調節がなされ、特に微調整が
可能となる。 That is, when the protrusion of the moving plate is fitted into the receiving part of the switching plate, it acts on the thread tension disc with a normal pressing force, and when the protrusion is not fitted into the receiving part, The pressure spring is constantly pressed by the height of the protrusion, and in this state, the tension can be adjusted within the allowable adjustment range with the adjustment knob, so even at a high tension stage, the tension can be adjusted over a wide range, and in particular, fine adjustment is possible.
図面にもとづいて、この考案の実施例を説明す
る。
An embodiment of this invention will be described based on the drawings.
第１図ないし第４図はこの考案の一実施例を示
す図である。 1 to 4 are diagrams showing an embodiment of this invention.
第１図および第２図はこの考案に係る糸張力調
節装置の要部縦断面図および張力切換え機構を構
成する移動板と切換え板の斜視図である。 1 and 2 are a vertical sectional view of a main part of a thread tension adjusting device according to the invention, and a perspective view of a moving plate and a switching plate constituting a tension switching mechanism.
図において、１は、糸調子皿２に作用する押圧
バネ、５は複数の突起５ａを有する移動板、６は
前記突起５ａを嵌合するための受け部としての貫
通孔６ａを突起５ａの数に応じて有する切換え板
である。 In the figure, 1 is a pressure spring that acts on the thread tension plate 2, 5 is a moving plate having a plurality of protrusions 5a, and 6 is a through hole 6a serving as a receiving part for fitting the protrusions 5a into the number of protrusions 5a. This is a switching board that has according to the
この移動板５と切換え板６とで構成される張力
切換え機構は図示のように押圧バネ１と糸調子皿
２との間に介装されている。 The tension switching mechanism composed of the moving plate 5 and the switching plate 6 is interposed between the pressure spring 1 and the thread tension disc 2 as shown in the figure.
移動板５に形成される突起５ａは、この実施例
の場合、第２図に示すように半球状のものが３箇
形成され、これに対応して切換え板６には受け部
としての貫通孔６ａが３箇形成されている。この
実施例で受け部は貫通孔で構成してあるが、移動
板の突起を収容して、移動板と切換え板とが密接
しうるようなものであればこれに限定されること
はない。なお、第２図において、６ｂは切換えつ
まみである。 In this embodiment, three hemispherical protrusions 5a are formed on the moving plate 5, as shown in FIG. Three portions 6a are formed. In this embodiment, the receiving part is formed of a through hole, but the receiving part is not limited to this as long as it can accommodate the protrusion of the moving plate and allow the moving plate and the switching plate to come into close contact with each other. In addition, in FIG. 2, 6b is a switching knob.
３は、糸調子皿２、押圧バネ１、移動板５、切
換え板６等を軸支してミシン機枠Ｆに支持すると
ともに、その端部に取付けた調節つまみ４の回転
により押圧バネ１を伸縮するための調節軸であ
る。 3 supports the thread tension plate 2, the pressure spring 1, the movable plate 5, the switching plate 6, etc. on the sewing machine frame F, and also controls the pressure spring 1 by rotating the adjustment knob 4 attached to the end thereof. It is an adjustment axis for expansion and contraction.
なお、７は調節ネジ、８はガイドピンである。 Note that 7 is an adjustment screw and 8 is a guide pin.
上述の構成の下にこの実施例の作用を主として
第３図および第４図にもとづいて説明する。第３
図は、この考案に係る糸張力調節装置の要部縦断
面図、同図ａは糸調子を強段階とした場合、同図
ｂは弱段階とした場合を示している。第４図は、
糸の張力特性をあらわすグラフである。 The operation of this embodiment with the above-described structure will be explained mainly based on FIGS. 3 and 4. Third
The figures are longitudinal cross-sectional views of essential parts of the thread tension adjusting device according to this invention. Figure a shows the case where the thread tension is set to the strong stage, and Figure b shows the case where the thread tension is set to the weak stage. Figure 4 shows
It is a graph showing the tension characteristics of yarn.
通常は、張力切換え機構は第３図ｂに示すよう
に弱（あるいはノーマル）状態になつている。 Normally, the tension switching mechanism is in a weak (or normal) state as shown in FIG. 3b.
すなわち、図示のようにこの状態では、移動板
５の各突起５ａは、切換え板６の貫通孔６ａにそ
れぞれ嵌合収納されており、このため移動板５と
切換え板６とは互いに密着している。この場合の
糸張力の糸の張力特性は第４図のグラフのＢにし
めされており、張力の最大値はy2となつている。 That is, as shown in the figure, in this state, each protrusion 5a of the moving plate 5 is fitted into the through hole 6a of the switching plate 6, and therefore the moving plate 5 and the switching plate 6 are in close contact with each other. There is. The yarn tension characteristic of the yarn tension in this case is shown in the graph B of FIG. 4, and the maximum value of the tension is y2 .
厚地あるいはロツクの全巻縫い等でもつと強い
張力範囲を必要とするときは、切換えつまみ６ｂ
を所定方向に回動して、第３図ａに示すように移
動板５の突起５ａと切換え板６の貫通孔６ａとの
嵌合状態を解除する。すると移動板５と切換え板
６との間には突起５ａの高さ分の間隙が生じる。 When a strong tension range is required for full-length sewing of thick fabrics or locks, use the switching knob 6b.
is rotated in a predetermined direction to release the fitted state between the projection 5a of the moving plate 5 and the through hole 6a of the switching plate 6, as shown in FIG. 3a. Then, a gap corresponding to the height of the protrusion 5a is created between the moving plate 5 and the switching plate 6.
このため、この間隙分だけ押圧バネ１は縮み、
これに応じて押圧力が増大する。 Therefore, the pressure spring 1 contracts by this gap,
The pressing force increases accordingly.
この段階における糸張力特性は、第４図のグラ
フのＡに示めされており、張力の最大値はy3とな
つている。そして、糸張力y1からy3までの範囲に
対する調節つまみの回転数範囲はx2となつてい
る。 The yarn tension characteristics at this stage are shown at A in the graph of FIG. 4, and the maximum value of the tension is y3 . The rotation speed range of the adjustment knob for the range of thread tension from y1 to y3 is x2 .
これを第６図に示す従来技術と比較すると従来
では、糸の張力y1からy3までの範囲に対応する調
節つまみの回転数範囲はx1でありx2−x1の分だけ
調節つまみの回転数範囲が増加し強い張力範囲で
の微調整が容易になつたことが明らかである。 Comparing this with the conventional technology shown in Fig. 6, in the conventional technology, the rotation speed range of the adjustment knob corresponding to the range of thread tension y 1 to y 3 is x 1 , and the adjustment knob is rotated by x 2 - x 1 . It is clear that the rotational speed range has increased, making it easier to make fine adjustments in the high tension range.
この考案は、以上述べた構成・作用により、糸
の張力範囲を広く設定することができしかも張力
の微調節も可能となり縫製品質および縫製能率が
ともに向上する。
With the above-described configuration and operation, this invention allows the tension range of the thread to be set over a wide range, and also allows for fine adjustment of the tension, thereby improving both sewing quality and sewing efficiency.
第１図は、この考案に係る糸張力調節装置の要
部縦断面図、第２図は張力切換え機構を構成する
移動板、切換え板の外観斜視図、第３図ａは張力
切換え機構が強段階にある場合の糸張力調節装置
の要部縦断面図、第３図ｂは、張力切換え機構を
弱段階にした場合の糸張力調節装置の要部縦断面
図、第４図は、この考案に係る糸張力特性と調節
つまみの回転数との関係をあらわすグラフ、第５
図は従来例における押圧バネの形状をあらわすグ
ラフである。第６図は、従来例における糸張力特
性と調節つまみの回転数との関係をあらわすグラ
フである。
図において、１……押圧バネ、２……糸調子
皿、４……調節つまみ、｛５……移動板、５ａ…
…突起、６……切換え板、６ａ……受け部｝張力
切換え機構。
Fig. 1 is a vertical sectional view of the main part of the thread tension adjustment device according to this invention, Fig. 2 is an external perspective view of the movable plate and switching plate that constitute the tension switching mechanism, and Fig. 3a shows that the tension switching mechanism is Fig. 3b is a longitudinal cross-sectional view of the main part of the thread tension adjusting device when the tension switching mechanism is in the weak stage, and Fig. 4 is a longitudinal cross-sectional view of the main part of the thread tension adjusting device when the tension switching mechanism is in the weak stage. Graph showing the relationship between thread tension characteristics and the number of rotations of the adjustment knob, No. 5
The figure is a graph showing the shape of a pressing spring in a conventional example. FIG. 6 is a graph showing the relationship between yarn tension characteristics and the number of rotations of the adjustment knob in a conventional example. In the figure, 1...pressure spring, 2...thread tension plate, 4...adjustment knob, {5...moveable plate, 5a...
...Protrusion, 6...Switching plate, 6a...Receptacle} Tension switching mechanism.
Claims (1)
押圧バネと、 調節ネジに遊嵌し、前記移動板の突起と嵌合す
る受け部を有する切換え板と、 調節ネジに遊嵌し、切換え板と調節ネジとの間
に介在した一対の糸調子皿と 調節軸の他端に固定した調節つまみとからなる
糸張力調節装置。[Scope of Claim for Utility Model Registration] An adjustment shaft supported at one end on the sewing machine frame, an adjustment screw screwed into the adjustment shaft, a movable plate having a protrusion loosely fitted to the adjustment screw, and between the sewing machine frame and the movable plate. a pressure spring fitted into the adjustment shaft; a switching plate loosely fitted into the adjustment screw and having a receiving portion that fits with the protrusion of the moving plate; a switching plate loosely fitted into the adjustment screw and between the switching plate and the adjustment screw. A thread tension adjustment device consisting of a pair of thread tension discs interposed between the thread tension discs and an adjustment knob fixed to the other end of the adjustment shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988011797U JPH0517030Y2 (en) | 1988-01-29 | 1988-01-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988011797U JPH0517030Y2 (en) | 1988-01-29 | 1988-01-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01115474U JPH01115474U (en) | 1989-08-03 |
| JPH0517030Y2 true JPH0517030Y2 (en) | 1993-05-07 |
Family
ID=31220665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988011797U Expired - Lifetime JPH0517030Y2 (en) | 1988-01-29 | 1988-01-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0517030Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008104752A (en) * | 2006-10-27 | 2008-05-08 | Aisin Seiki Co Ltd | Upper thread tension adjustment device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5651901Y2 (en) * | 1978-06-20 | 1981-12-03 | ||
| JPS5627899U (en) * | 1979-08-10 | 1981-03-16 |
-
1988
- 1988-01-29 JP JP1988011797U patent/JPH0517030Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008104752A (en) * | 2006-10-27 | 2008-05-08 | Aisin Seiki Co Ltd | Upper thread tension adjustment device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01115474U (en) | 1989-08-03 |
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