JPH0616616Y2 - Thread winding prevention device for looper thread control device of sewing machine - Google Patents
Thread winding prevention device for looper thread control device of sewing machineInfo
- Publication number
- JPH0616616Y2 JPH0616616Y2 JP1989112673U JP11267389U JPH0616616Y2 JP H0616616 Y2 JPH0616616 Y2 JP H0616616Y2 JP 1989112673 U JP1989112673 U JP 1989112673U JP 11267389 U JP11267389 U JP 11267389U JP H0616616 Y2 JPH0616616 Y2 JP H0616616Y2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- yarn
- looper
- control cam
- control device
- 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
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- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、二重環縫いミシンや偏平縫いミシンなどのミ
シンのベッド内に設けられるルーパ糸制御装置におい
て、糸切断時に生ずる糸制御装置へのルーパ糸の糸巻付
き防止装置に関する。DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a looper thread control device provided in a bed of a sewing machine such as a double chain stitch sewing machine and a flat stitch sewing machine, in which a looper to the thread control device generated at the time of thread cutting is provided. The present invention relates to a yarn winding prevention device.
従来技術 二重環縫いミシンや偏平縫いミシンには通常、糸供給源
よりルーパに至るベッド内のルーパ糸供給経路上に縫い
目形成過程に応じてルーパ糸を繰込み或いは繰出して糸
量を制御する糸制御装置が設けられている。2. Description of the Related Art In a double chain stitch sewing machine and a flat stitch sewing machine, a looper thread is usually loaded or unloaded depending on a stitch forming process on a looper thread supply path in a bed from a thread supply source to a looper to control the thread amount. A yarn control device is provided.
第８図はこの糸制御装置の一例を示すもので、一対のレ
ール１にスライド可能に支持されて下軸２と直交する方
向に進退可能な取付台３と、図示しないバネによって手
前側（図の左方）に付勢される取付台３をバネの作用に
抗して押込んだのち取付台３に係止し、該取付台を図の
使用位置にとゞめるストッパー４と（ストッパー４を外
すと、取付台３はバネの作用により手前側の非使用位置
に切換えられる）、取付台３に止着され、下軸２と直交
するスリット５を形成した糸繰り台６と、下軸２に固着
されてスリット５に嵌合し、下軸２ととに回転してスリ
ット２よりの突出量が変えられる一対の糸制御カム７
と、取付台３に軸着されて上下に開閉し、両糸制御カム
７の間に配置される糸押えレバー８と、糸繰り台６のス
リット５の両側にそれぞれ取着される糸道９と、糸繰り
台６に取着される糸調子器10とよりなっており、糸調子
器10より両糸道９に通したルーパ糸11を糸制御カム７に
掛け渡して糸押えレバー８を降ろし、この状態で下軸２
を回転させ、糸制御カム７の糸繰り台６よりの突出量の
変化により糸量を制御するようになっている。FIG. 8 shows an example of this yarn control device, which is slidably supported by a pair of rails 1 and is movable forward and backward in a direction orthogonal to the lower shaft 2, and a spring (not shown) on the front side (see FIG. The left side of the mounting base 3 is pushed against the action of the spring and then locked to the mounting base 3, and the stopper 4 (stopper 4) that stops the mounting base in the use position shown in the figure. 4 is removed, the mounting base 3 is switched to the non-use position on the front side by the action of the spring), and is fixed to the mounting base 3 and the thread guide base 6 having a slit 5 orthogonal to the lower shaft 2 and the lower shaft. A pair of thread control cams 7 fixed to No. 2 and fitted in the slit 5 , and rotated with the lower shaft 2 to change the protrusion amount from the slit 2.
And a thread pressing lever 8 which is pivotally attached to the mounting base 3 and opens and closes vertically, and is arranged between both thread control cams 7, and a thread path 9 which is attached to both sides of the slit 5 of the thread reeling base 6, respectively. , A thread tensioner 10 attached to the thread take-up base 6, the looper thread 11 passed from the thread tensioner 10 to both thread paths 9 is hung on the thread control cam 7, and the thread pressing lever 8 is lowered. Lower shaft 2 in this state
Is rotated to control the yarn amount by changing the amount of protrusion of the yarn control cam 7 from the yarn carrier 6.
考案が解決しようとする課題 縫製中、ときにルーパ糸が切断されることがあるが、糸
切れが糸制御カムより縫い目形成域側で起きると、第８
図に示すように供給源側の弛んだルーパ糸が糸制御カム
や下軸に巻付き、団子状となりがちである。こうした糸
付きが一旦起きると、一時ミシンを停止し、巻付いた糸
を除去しなければならないが、その除去にはかなりな手
間がかゝり作業能率が低下する。Problems to be solved by the invention Sometimes the looper thread is cut during sewing, but if thread breakage occurs on the side of the stitch forming area from the thread control cam,
As shown in the figure, the loose looper yarn on the supply source side tends to be wound around the yarn control cam or the lower shaft to form a dumpling. Once such threading occurs, it is necessary to stop the sewing machine temporarily and remove the wound thread, but it takes a lot of time and effort to remove the thread and the work efficiency is reduced.
本考案の目的は上記の問題を解決し、ルーパ糸が切断さ
れ、糸制御装置カム等に糸が巻き付き始めたとき、糸供
給源から糸制御装置カムに至る糸を切断して、巻き付い
た糸の除去のための作業を最小限にしたものである。The object of the present invention is to solve the above problems, and when the looper yarn is cut and the yarn starts to wind around the yarn control device cam or the like, the yarn from the yarn supply source to the yarn control device cam is cut and the wound yarn is wound. The work for removing is minimized.
課題の解決手段 本考案の糸巻付き防止装置は、スリット５を形成した糸
繰り台６と、回転軸に固定されて該軸の回転に従ってス
リット５からの突出量が変化し、それによってルーパ糸
の繰込み及び繰出しを行う糸制御カム７と、糸制御カム
７の両側に配置される糸道９とよりなり、糸供給源より
ルーパーに至る糸供給経路上に配置されるミシンの糸制
御装置において、糸供給源から糸制御カムに至る上記糸
供給経路を挟んで、その一側に押え板15、他側に可動板
19を対向配置すると共に、両板15、19のうち、少なくと
も一方の対向面に刃先が糸進行方向と逆向きに向く刃18
を設け、更に上記糸制御カム７のスリット５よりの突出
量が増加し、上記糸制御カムによってルーパ糸が繰り込
まれるときに可動板19を押え板15より離すと共に、スリ
ット５よりの糸制御カム７の突出量が減少し、ルーパ糸
の走行が停止する時期に可動板19を押え板15に接触させ
て押え板との間でルーパ糸を挾み、ルーパ糸を刃18に接
触させるように、可動板19を進退させる作動体24を設
け、両板15、19でルーパ糸を挟んだときの糸の引出しに
より糸切断が行われることを特徴とするものである。Means for Solving the Problems The yarn winding prevention device of the present invention includes a yarn reeling base 6 having a slit 5 formed therein, and a protrusion amount from the slit 5 that is fixed to a rotary shaft and changes with the rotation of the shaft. A thread control device for a sewing machine, which includes a thread control cam 7 that performs loading and unwinding and thread paths 9 that are arranged on both sides of the thread control cam 7, and that is arranged on a thread supply path from a thread supply source to a looper. The yarn feed path from the yarn feed source to the yarn control cam is sandwiched, and the holding plate 15 is provided on one side and the movable plate is provided on the other side.
The blades 18 are arranged so as to face each other, and the blade 18 has a blade edge facing the opposite direction to the yarn advancing direction on at least one of the facing surfaces of the plates 15 and 19.
Further, the amount of protrusion of the thread control cam 7 from the slit 5 increases, and when the looper thread is taken up by the thread control cam, the movable plate 19 is separated from the pressing plate 15 and the slidable plate 19 is slid. When the protrusion amount of the thread control cam 7 from the belt 5 is reduced and the traveling of the looper thread is stopped, the movable plate 19 is brought into contact with the holding plate 15 and the looper thread is sandwiched between the movable plate 19 and the holding plate to remove the looper thread. An actuator 24 for moving the movable plate 19 forward and backward is provided so as to come into contact with the blade 18, and thread cutting is performed by pulling out the thread when the looper thread is sandwiched between the both plates 15, 19. .
作用 ミシン作動中、可動板19が押え板15に向かって進退し、
押え板との間隔が開いたり閉じたりするが、通常の縫製
時においては、可動板が押え板に接触してルーパ糸を挟
み込んだときでも、ルーパ糸は走行を停止されているた
め、刃による糸の切断を起こすことはないが、可動板が
押え板に接触してルーパ糸を挟み込み、ルーパ糸が刃に
接触しているときにルーパ糸が糸制御カム等への糸巻き
付きによって緊張し、糸制御カム側に引出されると、刃
によりルーパ糸が切断され、それ以上の糸巻き付きが防
止される。従って糸巻付き量が僅かですむ。糸巻付き量
をより少なくするために糸巻付き防止装置を糸制御装
置、ことに糸制御カムに可及的に近付けるのが望まし
い。Action During operation of the sewing machine, the movable plate 19 moves back and forth toward the presser plate 15,
The space between the presser plate and the presser plate opens or closes.However, during normal sewing, even when the movable plate comes into contact with the presser plate and pinches the looper thread, the looper thread stops running, so Although the thread is not cut, the movable plate comes into contact with the pressing plate to pinch the looper thread, and when the looper thread is in contact with the blade, the looper thread becomes tense due to the thread winding around the thread control cam etc., When the looper thread is pulled out to the thread control cam side, the looper thread is cut by the blade and further thread winding is prevented. Therefore, the amount of thread wound is small. In order to reduce the thread winding amount, it is desirable to bring the thread winding prevention device as close as possible to the thread control device, especially to the thread control cam.
実施例 第１図は、偏平縫いミシンを示すもので、ベット12内に
は全体を符号13で示すルーパ糸制御装置が設置され、ル
ーパ14に供給される糸11を制御するようになっている。
この糸制御装置13は、第８図に示す従来の糸制御装置、
すなわち一対のレール１上にスライド可能に支持され、
図示しないバネと、ストッパー４とにより手前側の非使
用位置と奥側の使用位置とに切換可能な取付け台３と、
取付台３に取着され、スリット５を備えた糸繰り台６
と、下軸２に固着されて回転し、一部がスリット５より
突出する一対の糸制御カム７と、両糸制御カム７の間に
配置されて上下に開閉可能な糸押えレバー８と、糸繰り
台６のスリット５の両側に取着される糸道９とを有する
糸制御装置において、第２、３図に詳細に示されるよう
に、糸繰り台６上に押え板15を座金16を介して止ネジ17
によって止着するとともに先端に鋭利な刃18を形成した
板バネ19を押え板15と向い合うようにし、かつ先端と押
え板15とが適宜な間隔を存するようにして糸繰り台下に
座金21を介して止ネジ22によって止着し、片持ばり状に
支持してなるもので、刃18を押え板15に形成しためど20
に近接させている（第５図参照）。一方、板バネ下方の
下軸２には、突片状のカム24が取着され、第３図に示さ
れるように、糸制御カム７による糸11の繰り込みが解消
され、糸弛みが生じた一時機のみカムによって板バネ19
を突上げ、先端を押え板15に押付けるようになってい
る。First Embodiment FIG. 1 shows a flat stitch sewing machine. A looper thread control device, generally designated by 13, is installed in a bed 12 to control the thread 11 supplied to a looper 14. .
This yarn control device 13 is a conventional yarn control device shown in FIG.
That is, it is slidably supported on the pair of rails 1,
A mounting base 3 that can be switched between a non-use position on the front side and a use position on the back side by a spring (not shown) and a stopper 4,
Thread reel 6 attached to the mount 3 and having the slit 5
And a pair of thread control cams 7 that are fixed to the lower shaft 2 and rotate, and a part of which protrudes from the slits 5, and a thread pressing lever 8 that is arranged between both thread control cams 7 and that can be opened and closed vertically. In the yarn control device having the yarn paths 9 attached to both sides of the slit 5 of the yarn guide 6, as shown in detail in FIGS. 2 and 3, a presser plate 15 is mounted on the yarn guide 6 via washers 16. Set screw 17
A leaf spring 19 having a sharp blade 18 formed at its tip is fixed so as to face the holding plate 15, and a washer 21 is provided under the thread guide so that the tip and the holding plate 15 have an appropriate distance. through and fastened by screws 22, made of supporting a cantilever shape, prospect 20 formed in the retainer plate 15 edge 18
(See Fig. 5). On the other hand, a cam 24 in the form of a protruding piece is attached to the lower shaft 2 below the leaf spring, and as shown in FIG. 3, the thread 11 is not taken up by the thread control cam 7 and thread loosening occurs. Leaf spring by cam only for temporary machine 19
Is pushed up and the tip is pressed against the pressing plate 15.
本装置は以上のように構成され、ルーパ糸11は、糸弛め
が行われ、糸の走行が停止した時期には、板バネ先端が
押え板15に押付られてもその刃19で切断されるようなこ
とはないが、第４図に示されるように、糸が何らかの原
因で切れ、糸制御カム７や下軸２に巻付いて押え板15と
板バネ19に挟まれている糸11が糸制御カム７側に引き出
される場合、板バネ先端の刃19が引き出される糸11に作
用して刃19によって糸11が切断される。This device is configured as described above.The looper thread 11 is cut by the blade 19 even when the leaf spring tip is pressed against the pressing plate 15 when the thread is loosened and the traveling of the thread is stopped. However, as shown in FIG. 4, the thread is cut for some reason and is wound around the thread control cam 7 or the lower shaft 2 and is sandwiched between the holding plate 15 and the leaf spring 19. When the thread is pulled toward the thread control cam 7, the blade 19 at the tip of the leaf spring acts on the thread 11 to be pulled, and the thread 11 is cut by the blade 19.
第６図は本装置の他の態様を示すもので、板バネ19の先
端に刃を形成する代りに押え板15の下側にカッター27を
止ネジ28によって止着したものである。FIG. 6 shows another mode of the present apparatus, in which a cutter 27 is fixed to the lower side of the holding plate 15 by a set screw 28 instead of forming a blade at the tip of the leaf spring 19.
第７図は更に別の態様を示すもので、押え板15に形成さ
れるめど29の一端を鋭利な刃30として形成したものであ
る。Figure 7 is intended to show still another embodiment is obtained by forming one end of the prospect 29 formed in the retainer plate 15 as sharp edge 30.
なお上述の実施例では、板バネがカムの作用により開閉
するようになっているが、板バネの代わりに押え板を同
様にして開閉させるようにしてもよく、また板バネと押
え板を共に開閉させるようにしてもよい。In the above-described embodiment, the leaf spring is opened and closed by the action of the cam. However, instead of the leaf spring, the holding plate may be opened and closed in the same manner, or both the leaf spring and the holding plate may be opened. It may be opened and closed.
更に、押え板あるいは板バネの駆動は、下軸に固定した
カムでなく、他の駆動源（例えば、ソレノイド、エアー
シリンダー、パルスモーター等）によって糸制御カムの
回転に同期させてもよい。Further, the drive of the pressing plate or the leaf spring may be synchronized with the rotation of the yarn control cam by another drive source (for example, solenoid, air cylinder, pulse motor, etc.) instead of the cam fixed to the lower shaft.
考案の効果 本考案の糸巻付き防止装置は以上のように、ルーパ糸は
縫い目形成時において、ルーパ糸の走行が停止した時期
に、可動板と押え板とで挟み込まれ、刃に当てられるよ
うになっているもので、糸切れによりルーパ糸が糸制御
装置に巻付き、刃先に当たるルーパ糸が引出されるよう
になると、糸切断が行われるようになっており、一定量
以上の糸巻付きが防止され、巻付いた糸の除去のための
作業を最小限にすることができる。Effect of the Invention As described above, the yarn winding prevention device of the present invention allows the looper thread to be caught between the movable plate and the pressing plate and applied to the blade when the running of the looper thread is stopped when the seam is formed. When the looper thread is wound around the thread control device due to thread breakage and the looper thread that hits the blade edge is pulled out, thread cutting is performed, preventing the winding of a certain amount of thread or more. Therefore, the work for removing the wound yarn can be minimized.
しかもルーパ糸は上述するように、押え板と可動板とで
挟み付けられて刃に確実に当てられるため、糸制御装置
への糸巻付きによりルーパ糸が引出されたときには確実
に切断されるようになる。Moreover, as described above, since the looper thread is sandwiched between the presser plate and the movable plate and surely hits the blade, the looper thread is surely cut when the looper thread is pulled out by winding the thread on the thread control device. Become.
第１図は本考案に係るルーパ糸制御装置を備えた偏平縫
いミシンの斜視図、第２〜４図はルーパ糸制御装置の拡
大した斜視図で、第２図は糸の繰込みが行われるとき、
第３図は糸の繰出しが行われるとき、第４図は糸制御装
置に糸が巻付いた状態を示す。第５図は糸制御装置に設
置される糸巻付き防止装置の断面図、第６図は糸巻付き
防止装置の別の態様を示す断面図、第７図は他の態様の
断面図、第８図は従来の糸制御装置の斜視図を示す。 ２……下軸、３……取付台、６……糸繰り台、７……糸
制御カム、９……糸道、11……ルーパ糸、14……ルー
パ、15押え板、19……板バネFIG. 1 is a perspective view of a flat stitch sewing machine provided with a looper thread control device according to the present invention, FIGS. 2 to 4 are enlarged perspective views of the looper thread control device, and FIG. When
FIG. 3 shows a state in which the yarn is wound around the yarn control device when the yarn is being delivered. FIG. 5 is a cross-sectional view of a yarn winding prevention device installed in the yarn control device, FIG. 6 is a sectional view showing another aspect of the yarn winding prevention device, FIG. 7 is a sectional view of another aspect, and FIG. Shows a perspective view of a conventional yarn control device. 2 ... Lower shaft, 3 ... Mounting base, 6 ... Thread guide, 7 ... Thread control cam, 9 ... Thread path, 11 ... Looper thread, 14 ... Looper, 15 Presser plate, 19 ... Plate Spring
Claims (1)
軸に固定されて該軸の回転に従ってスリット５からの突
出量が変化し、それによってルーパ糸の繰込み及び繰出
しを行う糸制御カム７と、糸制御カム７の両側に配置さ
れる糸道９とよりなり、糸供給源よりルーパーに至る糸
供給経路上に配置されるミシンの糸制御装置において、
糸供給源から糸制御カムに至る上記糸供給経路を挟ん
で、その一側に押え板15、他側に可動板19を対向配置す
ると共に、両板15、19のうち、少なくとも一方の対向面
に刃先が糸進行方向と逆向きに向く刃18を設け、更に上
記糸制御カム７のスリット５よりの突出量が増加し、上
記糸制御カムによってルーパ糸が繰り込まれるときに可
動板19を押え板15より離すと共に、スリット５よりの糸
制御カム７の突出量が減少し、ルーパ糸の走行が停止す
る時期に可動板19を押え板15に接触させて押え板との間
でルーパ糸を挟み、ルーパ糸を刃18に接触させるよう
に、可動板19を進退させる作動体24を設け、両板15、19
でルーパ糸を挟んだときの糸の引出しにより糸切断が行
われることを特徴とするミシンのルーパー糸制御装置へ
の糸巻付き防止装置。1. A thread reeling base 6 having a slit 5 formed therein, and a thread control cam fixed to a rotary shaft and having a protrusion amount changing from the slit 5 according to the rotation of the shaft, whereby the looper yarn is reeled in and paid out. 7 and a yarn path 9 arranged on both sides of the yarn control cam 7, and in the yarn control device of the sewing machine arranged on the yarn supply path from the yarn supply source to the looper,
A pressing plate 15 is arranged on one side of the yarn supply path from the yarn supply source to the yarn control cam, and a movable plate 19 is arranged on the other side of the yarn supply path so as to face each other. Is provided with a blade 18 whose tip is oriented in the direction opposite to the yarn advancing direction, and the amount of protrusion of the thread control cam 7 from the slit 5 increases, and the movable plate 19 is moved when the looper thread is taken up by the thread control cam. As the thread control cam 7 protrudes from the slit 5 decreases with the distance from the holding plate 15, the movable plate 19 is brought into contact with the holding plate 15 at the time when the running of the looper thread is stopped, and the looper thread is formed between the movable plate 19 and the holding plate. An actuating body 24 for moving the movable plate 19 forward and backward is provided so that the looper thread is brought into contact with the blade 18, and both plates 15, 19
A thread winding prevention device for a looper thread control device of a sewing machine, characterized in that thread cutting is performed by pulling out the thread when the looper thread is sandwiched by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989112673U JPH0616616Y2 (en) | 1989-09-25 | 1989-09-25 | Thread winding prevention device for looper thread control device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989112673U JPH0616616Y2 (en) | 1989-09-25 | 1989-09-25 | Thread winding prevention device for looper thread control device of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0355077U JPH0355077U (en) | 1991-05-28 |
| JPH0616616Y2 true JPH0616616Y2 (en) | 1994-05-02 |
Family
ID=31661115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989112673U Expired - Lifetime JPH0616616Y2 (en) | 1989-09-25 | 1989-09-25 | Thread winding prevention device for looper thread control device of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0616616Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3748767B2 (en) * | 2000-10-11 | 2006-02-22 | ペガサスミシン製造株式会社 | Double chain stitch machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH670465A5 (en) * | 1986-07-18 | 1989-06-15 | Gegauf Fritz Ag |
-
1989
- 1989-09-25 JP JP1989112673U patent/JPH0616616Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0355077U (en) | 1991-05-28 |
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