JPS6125749Y2 - - Google Patents
Info
- Publication number
- JPS6125749Y2 JPS6125749Y2 JP1985074050U JP7405085U JPS6125749Y2 JP S6125749 Y2 JPS6125749 Y2 JP S6125749Y2 JP 1985074050 U JP1985074050 U JP 1985074050U JP 7405085 U JP7405085 U JP 7405085U JP S6125749 Y2 JPS6125749 Y2 JP S6125749Y2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- looper
- needle
- holding means
- feeding direction
- 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
- 239000004744 fabric Substances 0.000 claims description 32
- 238000009958 sewing Methods 0.000 claims description 17
- 238000005452 bending Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】
この考案は、二組の針とルーパーとの協働によ
り平行する二本の二重環縫目を形成し、特に、二
本の針をして、布送り方向に前後し且つ布送り方
向との交叉方向に離隔して平行し且つ布送り方向
先方の針を手前の針に対して高くなるように関連
させた二重環縫いミシンの角縫い制御装置に関す
る。[Detailed description of the invention] This invention forms two parallel double chain stitches by the cooperation of two sets of needles and a looper. This invention relates to a corner stitch control device for a double chainstitch sewing machine which runs back and forth and is spaced apart from and parallel to the cloth feeding direction, and in which the needle at the front in the cloth feeding direction is related to the needle at the front so as to be higher than the needle at the front.
従来、上記したような二本の針をもつ二重環縫
ミシンにおいて角縫いを形成する場合にはたとえ
ば第２Ａ図に示すように、布送り方向手前の針１
が角部R0に対応して位置したとき、布送り方向
先方の針２が布中より針先を離脱し且つ手前の針
１の針先が布先が布中に残るまで上昇させてミシ
ンを停止し、押え足（図示しない）を上昇して針
１が外側角部となるように針１を中心に布を第２
Ａ図の反時計方向へ旋回してから、押え足を下降
して引き続き第２Ｂ図上方へ布送りするようにミ
シンを駆動して縫目を形成していた。 Conventionally, when forming a corner stitch in a double chainstitch sewing machine having two needles as described above, for example, as shown in FIG. 2A, needle 1 at the front in the cloth feeding direction
is located corresponding to corner R 0 , the needle 2 at the front in the fabric feeding direction leaves the needle tip out of the fabric, and the needle tip of the front needle 1 is raised until the tip remains in the fabric, and the sewing machine , then raise the presser foot (not shown) and press the fabric into the second position, centering on needle 1, so that needle 1 is at the outer corner.
After turning counterclockwise in Figure A, the presser foot was lowered and the sewing machine was driven to feed the fabric upward in Figure 2B to form stitches.
しかし、針２が針１に対して布送り方向先方に
位置しているので、第２Ｂ図から明らかなように
針１を中心に布を旋回すると布に対して針２が前
の点Poから点P1まで変位して針２側のルーパー
糸Tb、針糸が余計に繰り出され、ミシンが再駆
動して布が針２の次の針落ち点P2方向へ送られる
と繰り出されたルーパー糸にたるみを生じるとと
もに、また前記した針高さのミシン停止時におけ
る主軸の回転角は、二重環ミシンにおいて周知の
ルーパー糸カム（ハマグリカム）がルーパー糸
Tbを緊張状態から解放する寸前のタイミングに
あるため、点P1となるように布が旋回されるとき
にルーパー糸Ｔbが引張られるとハマグリカムか
らルーパー糸がはずれてルーパー糸にたるみを生
じ、これらのたるみのためにルーパーにおけるル
ーパー糸の、いわゆる糸三角が確実に形成できな
くなり、針がルーパー糸の糸三角内に貫通できず
目飛びを生じる等の欠点を生じた。 However, since needle 2 is located ahead of needle 1 in the cloth feeding direction, as is clear from FIG. 2B, when the cloth is turned around needle 1, needle 2 moves from the previous point Po to the cloth. The looper thread Tb on the needle 2 side is displaced to point P 1 , the needle thread is unwound, and when the sewing machine is driven again and the fabric is fed in the direction of the next needle drop point P 2 of needle 2, the looper thread Tb is unwound. In addition to causing slack in the thread, the rotation angle of the main shaft when the sewing machine stops at the needle height mentioned above is caused by the well-known looper thread cam (clam cam) in double-ring sewing machines.
Since Tb is about to be released from the tensioned state, when the looper thread Tb is pulled while the cloth is turned to point P1 , the looper thread comes off from the clam cam, causing slack in the looper thread. These slacks made it impossible to reliably form the so-called thread triangle of the looper thread in the looper, resulting in defects such as the needle being unable to penetrate into the thread triangle of the looper thread, resulting in skipped stitches.
この考案は、上記従来のものの欠点を除去する
ことを目的とする。 This invention aims to eliminate the drawbacks of the above-mentioned conventional ones.
この考案の実施例を図面により説明すると、第
１図において、Taは布送り方向手前の針１に対
応するルーパー３に供給されるルーパー糸であ
り、Tbは布送り方向の針２に対応するルーパー
４に供給されるルーパー糸である。５，６はルー
パー糸Ta，Tbのルーパー３，４と供給源（図示
しない）との間の経路上に各別に配置した周知の
糸調子器であり、それぞれ適正な縫目張力となる
ように設定してある。７は糸調子器６より供給源
側のルーパー糸Tb経路上に配置した周知の糸調
子器（糸保持手段）であり、ルーパー糸Tbが通
過不能となるように調子皿７ａ間に挾持力が設定
してある。８は押え上げ機構（図示しない）に機
械的に連結した制御体（糸制御手段）であり、押
え下降時に糸調子器７の皿７ａに嵌入して挾持力
を解放する不作用位置及び押え上昇時に皿７ａ間
より離脱する作用位置とに回動可能に支持軸９に
支持する。 An embodiment of this invention will be explained with reference to the drawings. In Fig. 1, Ta is the looper yarn supplied to the looper 3 corresponding to the needle 1 in the front in the cloth feeding direction, and Tb is the looper yarn supplied to the looper 3 corresponding to the needle 2 in the cloth feeding direction. This is the looper yarn supplied to the looper 4. Reference numerals 5 and 6 indicate well-known thread tension devices placed separately on the paths between the loopers 3 and 4 of the looper threads Ta and Tb and a supply source (not shown), and are used to adjust the tension so as to maintain appropriate seam tension. It has been set. 7 is a well-known thread tension device (thread holding means) placed on the looper thread Tb path on the supply source side from the thread tension device 6, and a clamping force is applied between the tension discs 7a so that the looper thread Tb cannot pass through. It has been set. Reference numeral 8 denotes a control body (thread control means) mechanically connected to the presser foot lifting mechanism (not shown), and the control body fits into the plate 7a of the thread tension device 7 when the presser foot is lowered to release the clamping force, and the presser foot is raised. It is supported on a support shaft 9 so as to be rotatable to an operating position where it is separated from between the plates 7a.
１０は制御体８と一体に回動可能に支持軸９に
支持した可撓性をもつ係合体（係合手段）であ
り、先端に調子器６，７との間のルーパー糸Tb
を挿通するリング状の係合部１０ａを形成し、制
御体８が作用位置のときにはルーパー糸Tbの経
路が最短距離となるように係合部１０ａがルーパ
ー糸Tbから離隔する離隔位置（実線）となり、
制御体が不作用位置のときにはルーパー糸Tbの
経路を屈曲するように係合部１０ａがルーパー糸
Tbに係合する屈曲位置（鎖線）となる。また、
この実施例においては角部においては針１が布に
突き刺さり且針２が布上昇した主軸回転角に自動
的に停止するように構成してあり、このときハマ
グリカム（図示しない）はルーパー糸Tbを緊張
状態から解放する直前の状態にするように設定し
てある。 10 is a flexible engagement body (engagement means) supported on a support shaft 9 so as to be rotatable together with the control body 8, and a looper thread Tb between the tension devices 6 and 7 is attached at the tip.
A ring-shaped engagement part 10a is formed through which the looper thread Tb is inserted, and when the control body 8 is in the operating position, the engagement part 10a is separated from the looper thread Tb so that the path of the looper thread Tb is the shortest distance (solid line). Then,
When the control body is in the inactive position, the engaging portion 10a bends the path of the looper thread Tb.
This is the bent position (dashed line) where it engages with Tb. Also,
In this embodiment, the structure is such that the needle 1 pierces the fabric at the corner and the needle 2 automatically stops at the rotation angle of the main shaft at which the fabric rises, and at this time, the clam cam (not shown) pulls the looper thread Tb. It is set to bring you to the state just before you release yourself from the tense state.
この考案は以上のような構成であり、
縫製時には布押えは下降しているので制御体８
は作用位置に位置して糸調子器７の調子皿７ａを
解放し、係合体１０は離隔位置となり、ルーパー
糸Ta，Tbは糸調子器５，６によりそれぞれ適正
な張力を受ける。角縫い時に針落ち点Po，Poで
ミシンを停止し、布送り方向手前の針１を中心に
布を旋回するために押え上げ機構を操作して布押
えを上昇すると、制御体８が不作用位置に回動し
て皿７ａ間より離脱し、皿７ａ間に挾持されたル
ーパー糸Tbが供給源側より繰り出し不能とな
り、係合体１０が制御体８に従動して屈曲位置と
なるため係合部１０ａに挿通したルーパー系Tb
が屈曲し、ルーパー糸Tbは屈曲した長さだけル
ーパー４側より引き出される。布を旋回すると針
２は点P1となり、ルーパー糸Tbは係合体１０を
撓ませながら引き戻され、再びミシンが駆動され
ると係合係合体１０の弾性力によりルーパー系
Tbのたるみを徐かれた状態で針２が点P3に針落
ちし、ルーパー系Tbにより糸三角が確実に形成
されて針２が三角内に突入することができる。 This invention has the above-mentioned configuration, and since the presser foot is lowered during sewing, the control body 8
is located at the operating position and releases the tension disc 7a of the thread tension device 7, the engaging body 10 is placed in the separated position, and the looper threads Ta and Tb are respectively subjected to appropriate tension by the thread tension devices 5 and 6. During corner sewing, when the sewing machine is stopped at the needle drop points Po and Po and the presser foot is raised by operating the presser foot lifting mechanism to rotate the fabric around the needle 1 at the front in the fabric feed direction, the control body 8 becomes inactive. The looper thread Tb held between the plates 7a becomes unable to be fed out from the supply source side, and the engaging body 10 follows the control body 8 to the bent position and is engaged. Looper system Tb inserted into part 10a
is bent, and the looper thread Tb is pulled out from the looper 4 side by the bent length. When the cloth is turned, the needle 2 moves to point P1 , and the looper thread Tb is pulled back while bending the engaging body 10. When the sewing machine is driven again, the elastic force of the engaging body 10 causes the looper thread Tb to move back to the point P1.
With the slack of Tb removed, the needle 2 drops to point P3 , and the looper system Tb reliably forms a thread triangle, allowing the needle 2 to enter the triangle.
なお、本実施例においては周知の系調子器７を
糸保持手段とし、糸制御手段として皿７ａ間に進
入離脱するものを使用したが、糸を挾持、解放す
るものであれば他の手段でもよく、また押え上げ
手段に機械的に連結したものに代えて電磁石等の
作用により連動させてもよい。また係合手段及び
糸制御手段を布押え上げ手段に連動させたが別の
操作手段により単独に制御するようにしてもよ
い。 In this embodiment, the well-known system tension device 7 is used as the thread holding means, and a thread control means that moves in and out between the plates 7a is used, but other means may be used as long as they hold and release the thread. Alternatively, instead of being mechanically connected to the presser foot lifting means, it may be interlocked by the action of an electromagnet or the like. Further, although the engaging means and the thread controlling means are linked to the presser foot lifting means, they may be independently controlled by another operating means.
以上のようにこの考案によれば、布送り方向先
方の針に対応するルーパーと糸供給源との間のル
ーパー糸経路上においてルーパー糸を挾持する第
一位置及び解放する第二位置とに移動可能とした
糸保持手段７と、糸保持手段に関連配置し角縫い
時の手動操作に関連して糸保持手段を第一位置と
する作用位置とに移動可能とした糸制御手段８
と、糸ゆるめ手段に連動し不作用位置に関連して
糸保持手段よりもルーパー側のルーパー糸に係合
して角部において布の旋回により引き出される長
さを予め引き上げるように経路を屈曲し作用位置
に関連してルーパー糸を解放する可撓性をもつ係
合手段１０を設けたことにより、角縫時におい
て、布送り方向手前の針を中心に布を旋回する前
に、弾性をもつ係合手段が布送り方向先方の針に
対応するルーパーの糸を屈曲させてルーパー側よ
り引き上げておくので、布を旋回するときにルー
パー糸は係合手段を撓ませながら引き戻され、再
びミシンが駆動されると係合手段の弾性によりル
ーパー糸のたるみが除かれた状態で針落ちされる
から、角縫い時のルーパー糸による糸三角が確実
となつて針が確実に三角内に針落ちし、縫目を確
実にして商品の品質を向上する効果が得られる。 As described above, according to this invention, the looper moves to the first position where it clamps the looper yarn and the second position where it releases it on the looper yarn path between the looper corresponding to the needle at the front in the cloth feeding direction and the yarn supply source. and a thread control means 8 arranged in relation to the thread holding means and movable to an operating position in which the thread holding means is in a first position in connection with manual operation during corner stitching.
Then, in conjunction with the yarn loosening means, the looper yarn is engaged with the looper yarn on the looper side relative to the yarn holding means in relation to the inactive position, and the path is bent so as to preliminarily pull up the length drawn out by the turning of the cloth at the corner. By providing the flexible engaging means 10 that releases the looper thread in relation to the working position, during square sewing, the elastic thread is attached before the fabric is turned around the needle in front of the fabric in the fabric feeding direction. The engaging means bends the thread of the looper corresponding to the needle at the front in the cloth feeding direction and pulls it up from the looper side, so when the cloth is turned, the looper thread is pulled back while bending the engaging means, and the sewing machine starts again. When driven, the elasticity of the engaging means allows the needle to drop with the slack of the looper thread removed, so that the thread triangle formed by the looper thread during corner sewing is ensured, and the needle is surely dropped into the triangle. , the effect of improving the quality of the product by ensuring the seams is achieved.
第１図は本実施例の斜視図、第２Ａ図、第２Ｂ
図は二本針をもつミシンの角縫いを説明する説明
図である。
図において、１，２……針、３，４……ルーパ
ー、７……糸保持手段を構成する糸調子器、８…
…糸制御手段を構成する制御体、１０……係合手
段を構成する係合体である。
Fig. 1 is a perspective view of this embodiment, Fig. 2A, Fig. 2B
The figure is an explanatory diagram illustrating corner stitching using a sewing machine with two needles. In the figure, 1, 2...needle, 3, 4...looper, 7...thread tension device constituting thread holding means, 8...
. . . a control body constituting the thread control means, 10 . . . an engagement body constituting the engagement means.
Claims (1)
二重環縫目を形成する二組の針１，２とそれに対
応するルーパー３，４とをもち、針をして、布送
り方向に前後し且つ布送り方向との交叉方向に離
隔して平行し且つ布送り方向先方の針を手前の針
に対して高くなるように関連させた縫目形成機構
を有するミシンにおいて、 布送り方向先方の針に対応するルーパーと糸供
給源との間のルーパー経路上においてルーパー糸
を挾持する第一位置及び解放する第二位置とに移
動可能とした糸保持手段７と、 糸保持手段に関連配置し角縫い時の手動操作に
関連して糸保持手段を第一位置とする作用位置及
び第二位置とする不作用位置とに移動可能とした
糸制御手段８と、 制御手段に連動し、その不作用位置に関連して
糸保持手段よりもルーパー側のルーパー糸に係合
して角部において布の旋回により引き出される長
さを予め引き上げるように解放可能とし、可撓性
をもつ係合手段１０、 とを備えた二重環縫いミシンの角縫い制御装
置。[Claims for Utility Model Registration] Having two sets of needles 1 and 2 and corresponding loopers 3 and 4, which intertwine needle thread and looper thread to form two parallel double chain stitches, A stitch forming mechanism in which the needles are arranged in a manner that they move back and forth in the cloth feeding direction, are spaced apart from each other in a direction crossing the cloth feeding direction, and are parallel to each other so that the needle at the front in the cloth feeding direction is higher than the needle at the front. In the sewing machine, a thread holding means is movable between a first position for clamping the looper thread and a second position for releasing it on the looper path between the looper corresponding to the needle at the front in the cloth feeding direction and the thread supply source. 7, and a thread control means 8 arranged in relation to the thread holding means and movable between an active position where the thread holding means is a first position and an inactive position where the thread holding means is a second position in connection with manual operation during corner stitching. and, in conjunction with the control means, the looper yarn is engaged with the looper yarn on the looper side relative to the yarn holding means in relation to the inactive position thereof, and is releasable so as to pre-pull up the length drawn out by the turning of the cloth at the corner. , a flexible engagement means 10, and a corner stitch control device for a double chainstitch sewing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7405085U JPS612884U (en) | 1985-05-17 | 1985-05-17 | Corner stitch control device for double chain stitch sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7405085U JPS612884U (en) | 1985-05-17 | 1985-05-17 | Corner stitch control device for double chain stitch sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS612884U JPS612884U (en) | 1986-01-09 |
| JPS6125749Y2 true JPS6125749Y2 (en) | 1986-08-02 |
Family
ID=30613988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7405085U Granted JPS612884U (en) | 1985-05-17 | 1985-05-17 | Corner stitch control device for double chain stitch sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS612884U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02130401A (en) * | 1988-11-10 | 1990-05-18 | Daishowa Seiki Co Ltd | Touch sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212058A (en) * | 1975-07-16 | 1977-01-29 | Tokyo Juki Industrial Co Ltd | Double chain stitch sewing machine |
| JPS5278553A (en) * | 1975-12-23 | 1977-07-01 | Tokyo Juki Industrial Co Ltd | Chain stitching mechanism for sewing machine |
| JPS5391853A (en) * | 1977-01-20 | 1978-08-12 | Tokyo Juki Industrial Co Ltd | Yarn needle controller for chain stitch sewing machine |
| JPS55138494A (en) * | 1979-04-07 | 1980-10-29 | Union Special Gmbh | Controller for cotton for looper cotton of double ring sewing machine |
-
1985
- 1985-05-17 JP JP7405085U patent/JPS612884U/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212058A (en) * | 1975-07-16 | 1977-01-29 | Tokyo Juki Industrial Co Ltd | Double chain stitch sewing machine |
| JPS5278553A (en) * | 1975-12-23 | 1977-07-01 | Tokyo Juki Industrial Co Ltd | Chain stitching mechanism for sewing machine |
| JPS5391853A (en) * | 1977-01-20 | 1978-08-12 | Tokyo Juki Industrial Co Ltd | Yarn needle controller for chain stitch sewing machine |
| JPS55138494A (en) * | 1979-04-07 | 1980-10-29 | Union Special Gmbh | Controller for cotton for looper cotton of double ring sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS612884U (en) | 1986-01-09 |
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