JPH0135742Y2 - - Google Patents
Info
- Publication number
- JPH0135742Y2 JPH0135742Y2 JP5371185U JP5371185U JPH0135742Y2 JP H0135742 Y2 JPH0135742 Y2 JP H0135742Y2 JP 5371185 U JP5371185 U JP 5371185U JP 5371185 U JP5371185 U JP 5371185U JP H0135742 Y2 JPH0135742 Y2 JP H0135742Y2
- Authority
- JP
- Japan
- Prior art keywords
- thread ring
- hook
- sewing needle
- thread
- engaging protrusion
- 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
Links
- 238000009958 sewing Methods 0.000 claims description 51
- 230000002265 prevention Effects 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims 2
- 230000013011 mating Effects 0.000 claims 1
- 230000000630 rising effect Effects 0.000 description 4
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 2
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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、主としてインサイドフツク形式の
水平釜を備えたジグザグミシンの目飛び防止装置
に関するものである。[Detailed Description of the Invention] (Industrial Application Field) This invention mainly relates to a skipped stitch prevention device for a zigzag sewing machine equipped with an inside hook type horizontal hook.
(従来の技術)
従来、この種のジグザグミシンは、上下往復運
動及び横方向揺動運動可能な縫針と、その縫針の
目孔付近に形成された糸輪を捕捉する剣先を有
し、垂直固定軸線の周りに回転する外釜と、前記
縫針の落下を許容する切欠部を有し、前記外釜中
に嵌入保持される内釜とを備え、前記外釜の内方
に落下した縫針の糸輪を前記剣先が捕捉するよう
に構成され、ジグザグ縫いが行えるようになつて
いる。(Prior Art) Conventionally, this type of zigzag sewing machine has a sewing needle that can reciprocate vertically and swing horizontally, and a tip that captures a thread loop formed near the eye hole of the sewing needle, and is fixed vertically. The thread of the sewing needle that has fallen into the outer hook includes an outer hook that rotates around an axis, and an inner hook that is fitted and held in the outer hook and has a notch that allows the sewing needle to fall. The tip is configured to capture the loop, allowing zigzag stitching to be performed.
(考案が解決しようとする問題点)
しかしながら、この種のジグザグミシンにおい
ては、縫針の振り幅(ジグザグ幅)を大きく設定
するに伴つて、目飛びが発生し易くなるという不
具合を生じた。すなわち、第7図に示すように、
内釜72の切欠部73内における縫針の左右の両
揺動極限位置L,Rの中で、縫針の落下後の上昇
によつて形成されかつ外釜70の剣先71により
捕捉される時点での上糸のループ(糸輪ともい
う。)の大きさを比較すると、外釜70の回転方
向(図中矢印参照)に対向する側(剣先71の通
過が遅い左側)の揺動極限位置Lにおける上糸の
糸輪が他方(右側)の揺動極限位置Rにおける糸
輪よりも必然的に大きくなる。このため、その糸
輪が糸の撚りの影響を受けて捩られることにより
傾倒し、剣先71による糸輪の捕捉ができなくな
ることが原因となつて、前記目飛びが発生してい
た。したがつて、前記縫針の振り幅(最大揺動範
囲に相当する。)Aが、糸輪の傾倒が生じない程
度の大きさに制限され、これによつてジグザグ縫
いの模様の大型化が困難であるという問題点があ
つた。(Problems to be Solved by the Invention) However, in this type of zigzag sewing machine, as the swing width (zigzag width) of the sewing needle is set larger, a problem arises in that skipped stitches are more likely to occur. That is, as shown in Figure 7,
Among the left and right rocking extreme positions L and R of the sewing needle in the notch 73 of the inner hook 72, the position at which the sewing needle is formed by rising after falling and is captured by the tip 71 of the outer hook 70 Comparing the sizes of the needle thread loops (also referred to as thread loops), it is found that at the swing limit position L on the side opposite to the rotation direction of the outer hook 70 (see the arrow in the figure) (the left side where the tip 71 passes slowly) The thread ring of the upper thread is inevitably larger than the thread ring at the other (right side) swing extreme position R. For this reason, the yarn loop is twisted and tilted due to the influence of the twist of the yarn, and the tip 71 cannot capture the yarn loop, which causes the skipped stitches. Therefore, the swing width (corresponding to the maximum swing range) A of the sewing needle is limited to a size that does not cause the thread loop to tilt, and this makes it difficult to increase the size of the zigzag stitch pattern. There was a problem with this.
(問題点を解決するための手段)
上記した従来の技術における問題点を解決する
ためのこの考案は、上下往復運動及び横方向揺動
運動可能な縫針と、その縫針の目孔付近に形成さ
れた糸輪を捕捉する剣先を有し、垂直固定軸線の
周りに回転する外釜と、前記縫針の落下を許容す
る切欠部を有し、前記外釜中に嵌入保持される内
釜とを備え、前記外釜の内方に落下した縫針の糸
輪を前記剣先が捕捉するジグザグミシンにおい
て、前記外釜の回転方向と交差する方向に形成さ
れた前記切欠部の両端縁の中で、その回転方向に
対向する側に位置する一端縁に糸輪係合突部を設
け、その糸輪係合突部が前記縫針の最大揺動範囲
の両揺動極限位置の中で前記一端縁側に位置する
一揺動極限位置に近接すると共に前記剣先の移動
軌跡の真上に位置するように糸輪係合突部を延出
形成し、
前記縫針の糸輪と係合してその糸輪を前記剣先
の移動軌跡と交差する状態に保持するために前記
糸輪係合突部の係合面が前記縫針の一揺動極限位
置近傍から前記外釜の内周面に向つて延びている
ことを構成の要旨とするものである。(Means for Solving the Problems) This invention for solving the problems in the conventional techniques described above includes a sewing needle capable of vertical reciprocating movement and horizontal rocking movement, and a sewing needle formed near the eye hole of the sewing needle. an outer hook that has a tip for catching a thread ring and rotates around a vertically fixed axis; and an inner hook that is fitted and held in the outer hook and has a notch that allows the sewing needle to fall. , in a zigzag sewing machine in which the tip catches the thread loop of the sewing needle that has fallen into the inside of the outer hook, the rotation of the needle is controlled within both edges of the notch formed in a direction that intersects with the rotational direction of the outer hook; A thread ring engaging protrusion is provided on one end edge located on the opposite side in the direction, and the thread ring engaging protrusion is located on the one end edge side within both rocking extreme positions of the maximum swing range of the sewing needle. A thread ring engaging protrusion is formed to extend so as to be close to one swing limit position and located directly above the movement locus of the tip, and engages with the thread ring of the sewing needle to move the thread ring to the tip. The thread ring engaging protrusion has an engaging surface that extends from near one swing limit position of the sewing needle toward an inner circumferential surface of the outer hook in order to hold the thread ring in a state that intersects with a movement locus of the sewing needle. This is the gist of the report.
(作用)
上記した手段によれば、前記縫針の最大揺動範
囲の両揺動極限位置の中で前記外釜の回転方向に
対向する側の揺動極限位置において、縫針の落下
後の上昇によつて形成される上糸の糸輪が大きく
なつても、同糸輪は内釜の糸輪係合突部の係合面
にて保持されることにより、上糸の捩れによる糸
輪の傾倒が防止され、同糸輪に対する剣先の捕捉
が確実化される。(Function) According to the above-mentioned means, at the swing limit position on the side opposite to the rotational direction of the outer hook among both swing limit positions of the maximum swing range of the sewing needle, the sewing needle is prevented from rising after falling. Even if the thread ring of the upper thread that is formed becomes larger, the thread ring is held by the engagement surface of the thread ring engaging protrusion of the inner hook, thereby preventing the thread ring from tilting due to twisting of the upper thread. is prevented, and the grip of the tip of the sword on the same thread ring is ensured.
(実施例)
以下、この考案の一実施例を第1図〜第6図に
したがつて説明する。ジグザグミシンにおけるイ
ンサイドフツク形式でかつ全回転式の水平釜の全
体を平面で示した第2図において、周知のよう
に、外釜1内には内釜2が相対的に回転可能に嵌
入保持されている。内釜2の収容凹部3には下糸
ボビン(図示省略)が配置される。外釜1は内釜
2に対し、図示しない回転駆動機構を介して、垂
直固定軸線(図中、点P参照)を中心として反時
計周り方向(図中矢印参照)へ積極的に回転可能
になつている。内釜2の後部(図示上部)には切
欠部4が形成されており、外釜1の内方における
同切欠部4内に設定された左右の揺動極限位置
L,Rに縫針が落下されるようになつている。こ
の両揺動極限位置L,Rの相互の間隔が縫針の最
大揺動範囲Aに相当する。(Example) An example of this invention will be described below with reference to FIGS. 1 to 6. In FIG. 2, which is a plan view showing the entire inside-hook type fully rotary horizontal hook of a zigzag sewing machine, as is well known, an inner hook 2 is fitted and held in an outer hook 1 so as to be relatively rotatable. ing. A lower thread bobbin (not shown) is arranged in the accommodation recess 3 of the inner hook 2. The outer pot 1 is actively rotatable relative to the inner pot 2 in a counterclockwise direction (see arrow in the figure) about a vertical fixed axis (see point P in the figure) via a rotation drive mechanism (not shown). It's summery. A notch 4 is formed in the rear part (upper part in the figure) of the inner hook 2, and the sewing needle is dropped to left and right swing extreme positions L and R set in the notch 4 inside the outer hook 1. It is becoming more and more like this. The mutual interval between the two extreme swing positions L and R corresponds to the maximum swing range A of the sewing needle.
また、外釜1に形成された剣先5は若干内方へ
指向され、前記両揺動極限位置LあるいはRに落
下した縫針の上昇時に同縫針の後側(図において
上側)に形成される上糸の糸輪を捕捉しうるよう
になつている。 Further, the tip 5 formed on the outer hook 1 is directed slightly inward, and when the sewing needle that has fallen to the extreme swing position L or R rises, the tip 5 formed on the outer hook 1 is formed on the rear side (upper side in the figure) of the sewing needle. It is designed to catch the thread loop.
しかして、両揺動極限位置L,Rの中で、縫針
の落下後の上昇によつて形成されかつ外釜1の剣
先5により捕捉される時点での上糸のループ(糸
輪ともいう)。の大きさを比較すると、外釜1の
回転方向(図中矢印参照)に対向する側(剣先5
の通過が遅い側)、すなわち左側の揺動極限位置
Lにおける上糸の糸輪が他方(右側)の揺動極限
位置Rにおける糸輪よりも必然的に大きくなる。 Therefore, a loop (also referred to as a thread loop) of the needle thread at the point where it is formed by the rising of the sewing needle after falling and is caught by the tip 5 of the outer hook 1 between the two swinging extreme positions L and R. . Comparing the sizes of the side (tip 5
The thread loop of the upper thread at the left swinging extreme position L is inevitably larger than the thread loop at the other swinging extreme position R (the side where the passing of the upper thread is slow), that is, the left swinging extreme position L.
そこで、左側の揺動極限位置Lにおける上糸の
糸輪を前記剣先5が捕捉しうるように保持するた
めに施した具体的構成について次に詳述すること
にする。 Therefore, a specific structure provided for holding the thread loop of the needle thread at the left swinging extreme position L so that the thread ring can be captured by the tip 5 will be described in detail below.
水平釜の要部を平面で示した第1図、同水平釜
の要部を斜視図で示した第3図、第1図の−
線断面を拡大して示した第4図において、前記外
釜1の回転方向と交差する方向に形成された前記
切欠部4の両端縁の中で、外釜1の回転方向に対
向する側に位置する一端縁に糸輪係合突部7が延
出されている。この糸輪係合突部7は前記内釜2
に一体形成されている。 Figure 1 shows the main parts of the horizontal pot in a plan view, Figure 3 shows the main parts of the horizontal pot in a perspective view, and -
In FIG. 4, which shows an enlarged line cross section, there is a cutout on the side opposite to the rotational direction of the outer hook 1 among both edges of the notch 4 formed in the direction intersecting the rotational direction of the outer hook 1. A thread ring engaging protrusion 7 extends from one end edge thereof. This thread ring engaging protrusion 7 is connected to the inner hook 2.
It is integrally formed with.
糸輪係合突部7の先端部8は、左側の揺動極限
位置Lに近接されると共に、前記剣先5の移動軌
跡Tの真上に位置するように設定されている。 The distal end 8 of the thread ring engaging protrusion 7 is set to be close to the left swinging extreme position L and to be located directly above the movement locus T of the tip 5.
この糸輪係合突部7の外側に設定される係合面
9は、縫針の糸輪と係合してその糸輪を前記剣先
5の移動軌跡Tと交差する状態に保持するため
に、前記先端部8から前記外釜1の内周面に向つ
て形成されている。さらに同係合面9は、外釜1
の回転方向に対して傾斜しかつなだらかな円弧状
をなすように形成されている。 The engagement surface 9 set on the outside of the thread ring engagement protrusion 7 engages with the thread ring of the sewing needle and holds the thread ring in a state intersecting the movement locus T of the tip 5. It is formed from the tip 8 toward the inner circumferential surface of the outer hook 1. Furthermore, the engaging surface 9 is connected to the outer hook 1.
It is formed in a gentle arc shape that is inclined with respect to the direction of rotation.
上記した水平釜を備えたジグザグミシンにおい
て、いま前記両揺動極限位置L,Rの中で、外釜
1の回転方向に対向する左側の揺動極限位置Lに
おいて、縫針Nが落下して上昇するときに同縫針
Nの目孔N1の後側に形成される上糸Yの糸輪Y
1は、第5図および第6図に示すように、内釜2
の糸輪係合突部7の係合面9にて接触して保持さ
れることになる。 In the zigzag sewing machine equipped with the horizontal hook described above, the sewing needle N drops and rises at the left swing limit position L, which is opposite to the rotational direction of the outer hook 1, among the two swing limit positions L and R. The thread loop Y of the upper thread Y formed on the back side of the eye hole N1 of the sewing needle N when
1, as shown in FIGS. 5 and 6, the inner pot 2
are held in contact with the engagement surface 9 of the thread ring engagement protrusion 7 .
これによつて上糸Yの糸輪Y1は、回転駆動機
構により回転される外釜1の剣先5によつて確実
に捕捉され、正常の縫い目が形成されることにな
る。 As a result, the thread loop Y1 of the upper thread Y is reliably caught by the tip 5 of the outer hook 1 rotated by the rotational drive mechanism, and a normal stitch is formed.
また、糸輪係合突部7が内釜2に一体形成され
ているため、内釜2の構造が内釜2に別体の糸輪
係合突部7を取着するものに比し簡単であり、そ
の製作も容易である。 In addition, since the thread ring engaging protrusion 7 is integrally formed with the inner hook 2, the structure of the inner hook 2 is simpler than a structure in which a separate thread ring engaging protrusion 7 is attached to the inner hook 2. It is also easy to manufacture.
また、糸輪係合突部7の係合面9は、外釜1の
回転方向に対して傾斜されているため、上糸Yの
糸輪Y1の各種の大きさに適宜対応して、同糸輪
Y1を適正に保持することが可能である。 In addition, since the engagement surface 9 of the thread ring engagement protrusion 7 is inclined with respect to the rotational direction of the outer hook 1, the thread ring Y1 of the upper thread Y can be adjusted to suit various sizes of the thread ring Y1. It is possible to properly hold the thread ring Y1.
(考案の効果)
すなわち、この考案は前述した「問題点を解決
するための手段」の欄に記載した構成を要旨とな
し、前記縫針の最大揺動範囲の両揺動極限位置の
中で前記外釜の回転方向に対向する側の揺動極限
位置において、縫針の落下後の上昇によつて形成
される上糸の糸輪が大きくなつても、同糸輪は内
釜の糸輪係合突部の係合面にて保持されることに
より、上糸の捩れによる糸輪の傾倒が防止され、
同糸輪に対する剣先の捕捉が確実化されるもので
あるから、従来のジグザグミシンにおいて生じた
目飛びが防止されるという効果がある。したがつ
て、確実な縫成を行うことができると共に、縫針
の最大揺動範囲(振り幅)を大きく設定してジグ
ザグ縫いの模様を大型化することができる。(Effect of the invention) In other words, this invention has the configuration described in the above-mentioned "Means for solving the problem" section as a gist, and the above-mentioned point is set between the two swing extreme positions of the maximum swing range of the sewing needle. At the extreme swing position on the side opposite to the rotational direction of the outer hook, even if the thread loop of the needle thread formed by the rising of the sewing needle after dropping becomes larger, the same thread loop remains engaged with the thread loop of the inner hook. By being held by the engaging surface of the protrusion, the thread ring is prevented from tilting due to twisting of the upper thread.
Since the grip of the tip of the thread on the same thread ring is ensured, skipped stitches that occur in conventional zigzag sewing machines can be prevented. Therefore, reliable sewing can be performed, and the maximum swing range (swing width) of the sewing needle can be set to be large, so that the size of the zigzag stitch pattern can be increased.
第1図〜第6図はこの考案の一実施例を示すも
ので、第1図はジグザグミシンにおける水平釜の
要部平面図、第2図は同水平釜の全体平面図、第
3図は同水平釜の要部を示す斜視図、第4図は第
1図の−線断面拡大図、第5図は作用状態を
説明する平面図、第6図は同断面図、第7図は従
来例を示す水平釜の平面図である。
1……外釜、2……内釜、4……切欠部、5…
…剣先、7……糸輪係合突部、9……係合面、N
……縫針、N1……目孔、Y1……糸輪、A……
最大揺動範囲、L,R……揺動極限位置。
Figures 1 to 6 show an embodiment of this invention. Figure 1 is a plan view of the main parts of a horizontal hook in a zigzag sewing machine, Figure 2 is a plan view of the entire horizontal hook, and Figure 3 is a plan view of the entire horizontal hook. FIG. 4 is an enlarged sectional view taken along the - line in FIG. 1, FIG. 5 is a plan view illustrating the operating state, FIG. It is a top view of the horizontal pot which shows an example. 1...Outer pot, 2...Inner pot, 4...Notch, 5...
...Sword tip, 7... Thread ring engagement protrusion, 9... Engagement surface, N
... Sewing needle, N1 ... Eye hole, Y1 ... Thread ring, A ...
Maximum swing range, L, R... Maximum swing position.
Claims (1)
と、その縫針の目孔付近に形成された糸輪を捕
捉する剣先を有し、垂直固定軸線の周りに回転
する外釜と、前記縫針の落下を許容する切欠部
を有し、前記外釜中に嵌入保持される内釜とを
備え、前記外釜の内方に落下した縫針の糸輪を
前記剣先が捕捉するジグザグミシンにおいて、 前記外釜の回転方向と交差する方向に形成さ
れた前記切欠部の両端縁の中で、その回転方向
に対向する側に位置する一端縁に糸輪係合突部
を設け、その糸輪係合突部が前記縫針の最大揺
動範囲の両揺動極限位置の中で前記一端縁側に
位置する一揺動極限位置に近接すると共に前記
剣先の移動軌跡の真上に位置するように糸輪係
合突部を延出形成し、 前記縫針の糸輪と係合してその糸輪を前記剣
先の移動軌跡と交差する状態に保持するために
前記糸輪係合突部の係合面が前記縫針の一揺動
極限位置近傍から前記外釜の内周面に向つて延
びていることを特徴とする水平釜を備えたジグ
ザグミシンの目飛び防止装置。 (2) 前記糸輪係合突部は前記内釜と一体形成され
ていることを特徴とする実用新案登録請求の範
囲第(1)項記載の水平釜を備えたジグザグミシン
の目飛び防止装置。 (3) 前記糸輪係合突部の係合面は、前記外釜の回
転方向に対して傾斜して形成されていることを
特徴とする実用新案登録請求の範囲第(1)項記載
の水平釜を備えたジグザグミシンの目飛び防止
装置。[Scope of Claim for Utility Model Registration] (1) A sewing needle capable of vertically reciprocating movement and horizontally swinging movement, and having a tip for catching a thread ring formed near the eye of the sewing needle, and having a point around a vertically fixed axis. an outer hook that rotates, and an inner hook that has a notch that allows the sewing needle to fall and is fitted and held in the outer hook, and the thread ring of the sewing needle that has fallen into the outer hook is In a zigzag sewing machine that is captured by a tip, a thread wheel engaging protrusion is provided on one end edge located on a side opposite to the rotational direction of both edges of the notch formed in a direction intersecting the rotational direction of the outer hook. The thread ring engaging protrusion approaches the one extreme swing position located on the one end edge side of the two extreme swing positions of the maximum swing range of the sewing needle, and the thread ring engagement protrusion approaches the one extreme swing position located on the one end edge side, A thread ring engaging protrusion is formed to extend so as to be located above, and the thread ring engaging protrusion is configured to engage with the thread ring of the sewing needle and hold the thread ring in a state intersecting the movement locus of the tip. A skipped stitch prevention device for a zigzag sewing machine equipped with a horizontal hook, characterized in that an engagement surface of the mating protrusion extends from near one swing limit position of the sewing needle toward an inner circumferential surface of the outer hook. (2) A skipped stitch prevention device for a zigzag sewing machine equipped with a horizontal hook as set forth in claim (1) of the utility model registration claim, wherein the thread ring engaging protrusion is integrally formed with the inner hook. . (3) A utility model according to claim 1, wherein the engaging surface of the thread ring engaging protrusion is formed to be inclined with respect to the rotating direction of the outer hook. Skipping stitch prevention device for zigzag sewing machines equipped with a horizontal hook.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5371185U JPH0135742Y2 (en) | 1985-04-10 | 1985-04-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5371185U JPH0135742Y2 (en) | 1985-04-10 | 1985-04-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61170484U JPS61170484U (en) | 1986-10-22 |
JPH0135742Y2 true JPH0135742Y2 (en) | 1989-10-31 |
Family
ID=30574829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5371185U Expired JPH0135742Y2 (en) | 1985-04-10 | 1985-04-10 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0135742Y2 (en) |
-
1985
- 1985-04-10 JP JP5371185U patent/JPH0135742Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS61170484U (en) | 1986-10-22 |
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