JPH0399693A - Overlock machine capable of sewing back-tack - Google Patents
Overlock machine capable of sewing back-tackInfo
- Publication number
- JPH0399693A JPH0399693A JP23783589A JP23783589A JPH0399693A JP H0399693 A JPH0399693 A JP H0399693A JP 23783589 A JP23783589 A JP 23783589A JP 23783589 A JP23783589 A JP 23783589A JP H0399693 A JPH0399693 A JP H0399693A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- loops
- string
- locking
- work cloth
- 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.)
- Granted
Links
- 238000009958 sewing Methods 0.000 title claims abstract description 31
- 239000004744 fabric Substances 0.000 claims description 83
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 6
- 210000000078 claw Anatomy 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003936 working memory Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【発明の詳細な説明】
−
［産業上の利用分野］
本発明は縫製終了時に加工布に連なる糸の空環を針落下
点の布送り出し側へ向って吸引する吸引装置と、その吸
引装置によって吸引された糸の空環を切断する切断装置
とを備えたオーバーロ・ツクミシンに関する。[Detailed Description of the Invention] - [Industrial Application Field] The present invention provides a suction device that suctions the empty ring of yarn connected to the work cloth at the end of sewing toward the cloth feed side at the needle drop point, and a suction device that uses the suction device to The present invention relates to an overflow sewing machine equipped with a cutting device that cuts an empty ring of suctioned thread.
［従来の技術及び発明が解決しようとする課題］従来、
例えば特開昭５３−１２８４４３号公報（昭和５３年１
１月９日公開）に記載されたミシンでは、縫製終了時に
針落下点よりも布送り出し側において加工布に連なる糸
の空環を切断した後、ノズルから吹出されるエアによっ
て空環切断端を針落下点よりも布送り込み側へ吹き返し
、針落下点よりも布送り込み側において加工布支持面よ
りも上方に開口を備えた吸気装置によって前記空環切断
端を吸引した後、加工布支持面上に上下動可能に突出配
置されたブレードにより、前記空環切断端を加工布支持
面上に押圧して把持し、その空環切断端を次に縫製され
る加工布に縫い込むようになっている。[Prior art and problems to be solved by the invention] Conventionally,
For example, Japanese Unexamined Patent Publication No. 128443/1983 (1973)
In the sewing machine described in ``Released on January 9th'', at the end of sewing, after cutting the empty ring of thread connected to the workpiece fabric on the cloth feeding side from the needle drop point, the cut end of the empty ring is cut by air blown from the nozzle. The air is blown back to the cloth feeding side from the needle drop point, and after the cut end of the empty ring is sucked by a suction device having an opening above the work cloth support surface on the cloth feed side from the needle drop point, the air is blown back onto the work cloth support surface. A blade protrudingly disposed so as to be movable up and down presses and grips the cut end of the hollow ring onto the work cloth support surface, and the cut end of the hollow ring is sewn into the work cloth to be sewn next. There is.
ところが、上記のミシンでは、空環切断端を針落下点よ
りも布送り込み側において把持するためのブレードや吸
気装置が、加工布支持面上に突出配置されているため、
加工布支持面に加工布をセラ１〜したり、その加工布を
移送したりする際に、邪魔になって、加工布の取り扱い
を円滑に行い得ないという問題かある。However, in the above-mentioned sewing machine, the blade and suction device for grasping the cut end of the empty ring on the fabric feeding side rather than the needle drop point are arranged protruding from the workpiece fabric support surface.
There is a problem in that when the work cloth is placed on the work cloth support surface or when the work cloth is transferred, it gets in the way and the work cloth cannot be handled smoothly.
また、針落下点よりも布送り込み側において、加工布支
持面上に開口を形成可能な一対の挟持片を有する空環挟
持装置を設けると共に、加工布支持面よりも上方にエア
吹出装置を配設し、縫製終了後に前記一対の挟持片を作
動させて開口を形成した状態で、針落下点の布送り出し
側から布送り込み側へ向かい、エアによって吹き返され
た空環切断端を、前記エア吹出装置によって開口へ向っ
て吹付け、次いで前記一対の挟持片により開口を閉鎖し
て空環を挟持するようにした装置が提案されている。（
ＰＣＴ、Ｗ００８８１０２０３９）ところが、この装置
では空環の吹き返し及び吹付けか共に空気流によって行
われるにもかかわらず、開口の面積が狭く設定されてい
るため動作が不確実になり易く、挟持ミスが頻発して空
環切断端が所定位置に保持されなくなる虞れがあった。In addition, an empty ring clamping device having a pair of clamping pieces capable of forming an opening on the workpiece cloth support surface is provided on the cloth feed side from the needle drop point, and an air blowing device is arranged above the workpiece cloth support surface. After sewing is completed, actuate the pair of clamping pieces to form an opening, move from the fabric feed side of the needle drop point to the fabric feed side, and insert the cut end of the empty ring blown back by the air into the air blower. A device has been proposed in which a device sprays the air toward an opening, and then the pair of clamping pieces closes the opening to clamp an empty ring. (
(PCT, W0088102039) However, although this device uses airflow to blow back and blow the empty ring, the opening area is set to be narrow, so the operation tends to be uncertain and clamping errors occur frequently. There was a risk that the cut end of the empty ring would not be held in a predetermined position.
また、空環は空気流によって吹付けられた位置において
、その切断端を挟持されるのみで十分な張力か付与され
ないため、空環の針板爪への引掛かりを生じたり、空環
の弛みのために空環幅が広くなり、あるいは空環が蛇行
して配置されることにより、パックタック縫製時に空環
か縫目からはみ出してしまい、縫い上がりが一定しない
という問題があった。In addition, at the position where the airflow blows the air ring, the cut end of the air ring is only pinched, and sufficient tension is not applied to it. As a result, the width of the empty ring becomes wide, or the empty ring is arranged in a meandering manner, which causes the empty ring to protrude from the seam during pack tuck sewing, resulting in uneven sewing results.
本発明は上記事情に鑑みなされたものであって、その目
的は、空環切断端を針落下点よりも布送り込み側で保持
するに際して、加工布支持面よりも上方へ常に突出する
部材を設ける必要かなく、加工布の取り扱いを容易に行
うことかできると共に、空環切断端の保持を確実に行い
、しかも空環に適度な張力を付与して縫い上かりを一定
させることができるバックタック縫製可能なオーバーロ
ックミシンを提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a member that always protrudes above the work cloth support surface when holding the cut end of the empty ring on the cloth feeding side rather than the needle drop point. A back tack that does not require the use of a back tack, which makes it easier to handle the processed fabric, securely holds the cut end of the loop, and applies appropriate tension to the loop to ensure consistent stitching. The purpose is to provide an overlock sewing machine that can sew.
［課題を解決するための手段］
上記課題を解決するために本発明は、針落下点よりも布
送り出し側に配置され、エアを噴出することにより、切
断装置によって切断された空環を針落下点よりも布送り
込み側へ移動させる移動手段と、針落下点よりも布送り
込み側にて加工布支持面上に突出し、前記移動手段によ
り移動された空環に当接してその空環の位置を規制する
規制位置と、加工布支持面内に倒状し、空環を加工布支
持面上に係止する係止位置とに切換え配置可能に設けら
れた係止部材と、前記移動手段による空環の移動時に前
記係止部材を規制位置に配置させると共に、空環の移動
動作後に係止位置へ切り換える第一駆動手段と、針落下
点よりも布送り込み側にて前記係止部材によって位置規
制された空環から離間する退避位置と、前記係止部材に
よって係止された空環に係合してその空環に張力を付与
する係合位置とに切換え配置可能に設けられた張力付与
部材と、前記係止部材が係止位置に配置された後に、張
力付与部材を退避位置から係合位置へ切り換える第二駆
動手段とを備えている。[Means for Solving the Problems] In order to solve the above problems, the present invention is arranged on the cloth feeding side from the needle drop point, and blows out air to prevent the empty ring cut by the cutting device from falling from the needle. a moving means for moving the needle to the cloth feeding side beyond the needle drop point; A locking member is provided so as to be switchable between a regulating position where the ring is restricted and a locking position where the empty ring is inverted within the work cloth support surface and locks the empty ring on the work cloth support surface; a first driving means for arranging the locking member in a regulating position when the ring is moved and switching it to the locking position after the movement of the empty ring; A tension applying member is provided so as to be switchable between a retracted position where the tension applying member separates from the empty ring locked by the locking member and an engagement position where the tension applying member engages with the empty ring locked by the locking member and applies tension to the empty ring. and a second driving means for switching the tension applying member from the retracted position to the engaged position after the locking member is placed in the locked position.
［作用］
縫製が終了すると、吸引装置が作動されて、加工布に連
なる糸の空環か針落下点の布送り出し側へ向って吸引さ
れ、その空環が切断装置によって切断される。切断後の
空環は移動手段から噴出されるエアにより針落下点より
も布送り込み側へ吹き返される。この時、第一駆動手段
により、係止部材が加工布支持面上に突出する規制位置
に配置されていると、前記空環がその係止部材に当接し
て位置規制される。続いて、第一駆動手段により、係止
部材が加工布支持面内に倒状する係止位置に配置される
と、空環が加工布支持面上に係止される。更に、第二駆
動手段により、張力付与部材が退避位置から係合位置へ
配置されると、張力付与部材が係止部材によって位置規
制された空環に係合して張力を付与し、空環の弛みを防
止する。[Operation] When the sewing is finished, the suction device is activated to suck the empty loop of thread connected to the work cloth toward the cloth delivery side of the needle drop point, and the empty loop is cut by the cutting device. The empty ring after cutting is blown back toward the cloth feed side from the needle drop point by the air blown out from the moving means. At this time, when the locking member is placed in a regulating position where it projects above the work cloth support surface by the first driving means, the empty ring comes into contact with the locking member and its position is restricted. Subsequently, when the locking member is placed in a locking position inverted within the work cloth support surface by the first driving means, the empty ring is locked on the work cloth support surface. Furthermore, when the tension applying member is arranged from the retracted position to the engaging position by the second driving means, the tension applying member engages with the empty ring whose position is regulated by the locking member and applies tension to the empty ring. prevent loosening.
［実施例］
以下に、本発明を具体化した一実施例について図面に従
って説明する。[Example] An example embodying the present invention will be described below with reference to the drawings.
第１図に示すように、ミシン本体のベツド部１の加工布
支持面２上には針通通孔３ａ、糸輪形成用の針板爪３ｂ
及び送り歯用開口３ｃを備えた針板３か装着され、この
針板３の上方には押え足４が配設されている。針５は針
通通孔３ａを貫通ずるように上下動可能に設けられ、針
板３の下方には送り歯用開口３ｃを通って針板３上に出
没される送り歯６が設けられている。そして、この送り
歯６と押え足４との協働により、加工布支持面２上の加
工布に対しＰ矢印方向への送りが付与され、これに伴う
針５とルーパー（図示略）との協働により、針板爪３ｂ
上にて加工布にはその辺縁に沿うオーバーロック縫目が
形成される。As shown in FIG. 1, on the work cloth support surface 2 of the bed section 1 of the sewing machine body, there is a needle passage hole 3a and a needle plate claw 3b for forming a thread loop.
A throat plate 3 having a feed dog opening 3c is attached, and a presser foot 4 is disposed above the throat plate 3. The needle 5 is provided so as to be movable up and down so as to pass through the needle passage hole 3a, and a feed dog 6 is provided below the needle plate 3 to be retracted onto the throat plate 3 through the feed dog opening 3c. . Through the cooperation of the feed dog 6 and the presser foot 4, the work cloth on the work cloth support surface 2 is fed in the direction of the arrow P, and the needle 5 and the looper (not shown) are Through cooperation, the throat plate claw 3b
At the top, the work cloth is formed with an overlock seam along its edges.
針落下点よりも布送り込み側において、ベツド部１には
縫目形成に先立って加工布の辺縁を切断するための一対
の切刃７ａ、７ｂを備えたカッター装置７が装着されて
いる。また、針落下点よりも布送り出し側において、ベ
ツド部１上には、はぼ布送り方向に沿って延びる空気通
路１０を備えた支持体１１が装着され、その上面はカバ
ー１２によって覆われている。前記空気通路１０の後方
端部（図示略）には、加工布の端部に連なる糸の空環Ｒ
を吸入するための吸入空気流を空気通路１０内に発生さ
せる吸引管と、前記空環Ｒを布送り込み側へ吹き返すた
めの噴出空気流を空気通路内に発生させる噴出管とが設
けられている。A cutter device 7 equipped with a pair of cutting blades 7a and 7b for cutting the edges of the work cloth prior to stitch formation is mounted on the bed portion 1 on the cloth feeding side of the needle drop point. Further, on the cloth feeding side of the needle drop point, a support body 11 having an air passage 10 extending along the cloth feeding direction is mounted on the bed portion 1, and its upper surface is covered with a cover 12. There is. At the rear end (not shown) of the air passage 10, there is an empty ring R of yarn connected to the end of the work cloth.
A suction pipe that generates an intake air flow in the air passage 10 for sucking in the fabric, and a blowout pipe that generates an ejection air flow in the air passage for blowing the empty ring R back toward the cloth feeding side are provided. .
カバー１２の内側においてラッパ形に拡開する空気通路
１０の開口部１０ａには、固定刃１３が配設されると共
に可動刃１４が往復動可能に配設され、両者１３．１４
によって空環切断装置１５が構成されている。そして、
空気通路１０に吸入された空環Ｒが前記可動刃１４の往
復動に伴って、固定刃１３との協働により切断される。A fixed blade 13 and a movable blade 14 are provided in an opening 10a of an air passage 10 that expands in a trumpet shape inside the cover 12, and a movable blade 14 is provided so as to be reciprocating.
The empty ring cutting device 15 is configured by the following. and,
The air ring R sucked into the air passage 10 is cut by the reciprocation of the movable blade 14 in cooperation with the fixed blade 13.
尚、前記空環切断装置１５は、本出願と同一の出願人に
よる実公昭５８−２２７０５号公報（昭和５８年５月１
４日公告）に記載されたものと同一の構成である。The empty ring cutting device 15 is described in Japanese Utility Model Publication No. 58-22705 (May 1, 1982) by the same applicant as the present application.
The structure is the same as that described in the public notice issued on the 4th.
第１図に示すように、針板６の布送り込み側において、
ベツド部１に設けた支持部材２０には摺動プレート２２
が、その摺動プレート２２上において左右方向に並設さ
れた一対の長孔２３と、前記支持部材２０に設けられた
一対の軸２１との係合を介して左右方向へ摺動可能に支
持されている。As shown in FIG. 1, on the cloth feeding side of the throat plate 6,
A sliding plate 22 is attached to the support member 20 provided on the bed portion 1.
is supported slidably in the left-right direction through engagement between a pair of elongated holes 23 arranged in parallel in the left-right direction on the sliding plate 22 and a pair of shafts 21 provided in the support member 20. has been done.
そして、前記支持部材２０の左端部には切断用エアシリ
ンダ２４が設けられ、そのピストン２４ａの先端が摺動
プレート２２の一端部に連結されている。摺動プレート
２２は切断用エアシリンダ２４のピストン２４ａの突出
時に右端位置に配置され、ピストン２４ａの没入時に左
端位置く実線位置）に配置される。A cutting air cylinder 24 is provided at the left end of the support member 20, and the tip of its piston 24a is connected to one end of the sliding plate 22. The sliding plate 22 is located at the right end position when the piston 24a of the cutting air cylinder 24 is extended, and is located at the left end position (solid line position) when the piston 24a is retracted.
第１〜３図に示すように、摺動プレート２２の上部右端
には支持ブロック２５が一体摺動可能に設けられ、支持
ブロック２５の上面には凹所２５ａが形成されている。As shown in FIGS. 1 to 3, a support block 25 is slidably provided at the upper right end of the sliding plate 22, and a recess 25a is formed in the upper surface of the support block 25.
第２図に示すように、支持ブロック２５の上部後端には
係止部材２６が軸２７にて回動可能に支持され、この係
止部材２６には支持ブロック２５の上方に延びる係止片
２６ａと、支持ブロック２５の右側面に配置される三叉
部２６ｂとがそれぞれ形成されている。そして、この係
止部材２６は、前記凹所２５ａに倒状して、０
加工布支持面２内に位置すると共に、空環Ｒを凹所２５
ａ上に係止する係止位置く二点鎖線で示す）と、係止片
２６ａが凹所２５ａから離間して加工布支持面２上に突
出すると共に、前記空気通路１０からの噴出空気流によ
って吹き返される空環Ｒを当接させてその空環Ｒの位置
を規制する規制位置く実線で示す）とに切換え配置され
る。As shown in FIG. 2, a locking member 26 is rotatably supported on a shaft 27 at the upper rear end of the support block 25, and a locking piece extending above the support block 25 is attached to the locking member 26. 26a, and a three-pronged portion 26b disposed on the right side surface of the support block 25. The locking member 26 is inverted in the recess 25a and positioned within the work cloth support surface 2, and the empty ring R is held in the recess 25a.
a), the locking piece 26a is spaced apart from the recess 25a and protrudes above the work cloth support surface 2, and the air flow ejected from the air passage 10 is The control position (indicated by a solid line) is arranged to control the position of the empty ring R by bringing it into contact with the empty ring R that is blown back.
前記支持ブロック２５の下部前面に設けられた突出部２
５ｂには、糸掴み用エアシリンダ３０が装着され、その
ピストン３０ａ上には係合ピン３１ａを有する連結具３
１が取着されている。また、前記支持ブロック２５の中
央部右側面には連結リンク２８がその中央部にて軸２９
により回動可能に支持されている。この連結リンク２８
の前端部には二叉部２８ａか形成されて前記係合ピン３
１ａに係合されると共に、連結リンク２８の後端部には
係合突起２８ｂが設けられ、前記係止部材２６の二叉部
２６ｂに係合されている。A protrusion 2 provided on the lower front surface of the support block 25
5b is equipped with a thread gripping air cylinder 30, and on its piston 30a is a connecting tool 3 having an engaging pin 31a.
1 is attached. Further, on the right side of the center portion of the support block 25, a connecting link 28 is provided with a shaft 29 at the center portion.
It is rotatably supported by. This connecting link 28
A forked portion 28a is formed at the front end of the engaging pin 3.
1a, and an engaging protrusion 28b is provided at the rear end of the connecting link 28, and is engaged with the bifurcated portion 26b of the locking member 26.
そして、糸掴み用エアシリンダ３０のピストン３０ａの
没入時には、連結具３１、連結リンク２１
８を介して係止部材２６が規制位置に配置され、ピスト
ン３０ａの突出時には、係止部材２６が係止位置に配置
される。尚、連結リンク２８、糸掴み用エアシリンダ３
０及び連結具３１により第一駆動手段が構成されている
。When the piston 30a of the thread gripping air cylinder 30 is retracted, the locking member 26 is placed in the regulating position via the connecting tool 31 and the connecting link 218, and when the piston 30a is extended, the locking member 26 is locked. placed in position. In addition, the connecting link 28 and the thread gripping air cylinder 3
0 and the connector 31 constitute a first driving means.
一方、第３図に示すように、前記支持ブロック２５の上
部左側面には張力付与部材３５が軸３６により回動可能
に支持されている。この張力付与部材３５の側縁には前
記係止部材２６によって凹所２５ａ上に係止された空環
Ｒに係合する係合部３５ａが形成されており、張力付与
部材３５の先端部には前記係止部材２６の係止片２６ａ
の外側に位置する突片３５ｂが形成されている。また、
張力付与部材３５には前記支持ブロック２５の上部左側
に切欠き形成された切欠凹部２５ｃ内に向けて突出する
係合突起３５ｃが設けられている。On the other hand, as shown in FIG. 3, a tension applying member 35 is rotatably supported on the upper left side surface of the support block 25 by a shaft 36. As shown in FIG. An engaging portion 35a is formed on the side edge of the tension applying member 35, and engages with the hollow ring R that is locked onto the recess 25a by the locking member 26. is the locking piece 26a of the locking member 26
A protruding piece 35b located outside is formed. Also,
The tension applying member 35 is provided with an engaging protrusion 35c that protrudes into a notched recess 25c formed on the upper left side of the support block 25.
そして、この張力付与部材３５は、第３，４図に示すよ
うに、加工布支持面２上に突出すると共に、突片３５ｂ
が規制位置に配置された係止部材２６の係止片２６ａよ
りも後方に配置される退避位置２
と、第５図に示すように、係止部材２６が係止位置に配
置された状態において凹所２５ａに倒状すると共に、係
止部材２６によって係止された空環Ｒを、その空環Ｒと
係合部３５ａとの係合により最初の係止位置から更に布
送り込み側へ押出して空環Ｒに張力を付与する係合位置
とに切換え配置される。As shown in FIGS. 3 and 4, this tension applying member 35 protrudes above the work cloth support surface 2, and also protrudes from the projecting piece 35b.
In the retracted position 2, in which the locking member 26 is placed rearward than the locking piece 26a of the locking member 26, which is placed in the restriction position, and in the state in which the locking member 26 is placed in the locking position, as shown in FIG. The hollow ring R, which is inverted in the recess 25a and is locked by the locking member 26, is further pushed out from the initial locking position toward the cloth feeding side by the engagement between the hollow ring R and the engaging portion 35a. The engagement position is switched to apply tension to the empty ring R.
第１図に示すように、前記摺動プレート２２ ｆ。As shown in FIG. 1, the sliding plate 22f.
には張力付与エアシリンダ３９か設けられている。A tension applying air cylinder 39 is also provided.
一方、第３図に示すように、前記支持ブロック２５の左
側面には、作動杆３７がそれに透設された長孔３７ａと
支持ブロック２５上に突設された軸３８との係合を介し
て上下動可能に支持され、作動杆３７の下端部が前記張
力付与エアシリンダ３９のピストン３９ａに連結されて
いる。作動杆３７の上端部には、前記支持ブロック２５
の切欠凹部２５Ｃ内にて移動可能な伝達部材４０が装着
され、その先端部には二叉部４０ａが形成されて、前記
張力付与部材３５の係合突起３５ｃに係合している。On the other hand, as shown in FIG. 3, an operating rod 37 is mounted on the left side of the support block 25 through engagement between a long hole 37a formed therethrough and a shaft 38 protruding from the support block 25. The lower end of the operating rod 37 is connected to the piston 39a of the tension applying air cylinder 39. The support block 25 is attached to the upper end of the operating rod 37.
A movable transmission member 40 is mounted within the cutout recess 25C, and a forked portion 40a is formed at the distal end of the transmission member 40, which engages with the engagement protrusion 35c of the tension applying member 35.
３
そして、第３，４図に示すように、張力付与エアシリン
ダ３９のピストン３９ａの突出時には、作動杆３７及び
伝達部材４０が一体上動され、前記二叉部４０ａと係合
突起３５ｃとの係合に基づき張力付与部材３５が退避位
置に配置される。また、第５図に示すように、係止部材
２６が係止位置に配置された状態において、ピストン３
０ａが没入された時には、作動杆３７及び伝達部材４０
は一体下動されて第３図の二点鎖線位置に配置され、張
力付与部材３５が係合位置に配置される。3. As shown in FIGS. 3 and 4, when the piston 39a of the tension-applying air cylinder 39 projects, the operating rod 37 and the transmission member 40 are moved upward together, and the fork portion 40a and the engagement protrusion 35c are moved upward. Based on the engagement, the tension applying member 35 is placed in the retracted position. Further, as shown in FIG. 5, when the locking member 26 is in the locking position, the piston 3
When 0a is retracted, the operating rod 37 and the transmission member 40
are integrally moved down and placed at the position indicated by the two-dot chain line in FIG. 3, and the tension applying member 35 is placed at the engagement position.
この際、張力付与部材３５の突片３５ｂと係止片２６ａ
との間には間隙が保持され、張力付与部材３５が係合位
置にあっても係止部材２６が前記間隙の範囲内で微回動
することができ、空環Ｒの係止を緩めることかできる。At this time, the protruding piece 35b of the tension applying member 35 and the locking piece 26a
A gap is maintained between them, and even if the tension applying member 35 is in the engaged position, the locking member 26 can rotate slightly within the range of the gap, and the locking of the hollow ring R can be loosened. I can do it.
尚、作動杆３７、張力付与エアシリンダ３９及び伝達部
材４０により第二駆動手段が構成されている。Note that the operating rod 37, the tension applying air cylinder 39, and the transmission member 40 constitute a second driving means.
また、本実施例のミシンは、第６図に示す制御装置を備
えている６即ち、中央処理装置（以下、ＣＰＵという）
４４にはミシンの制御プログラム４
を記憶したＲＯＭ４５及び作業用メモリとしてのＲＡＭ
４６が電気的に接続されている。また、ＣＰ ｔＪ ４
４には前記切断用エアシリンタ２４、糸掴み用エアシリ
ンダ３０及び張力付与エアシリンダ３９がそれぞれ開閉
用のバルブ４７，４８．４９を介して接続され、更に、
ミシン駆動用のミシンモータ５０、空環Ｒを吸引するた
め空気通路１０内に吸入空気流を発生させる吸引バルブ
５１及び空環Ｒを移動するため空気通路ｌＯ内に噴出空
気流を発生させる噴出バルブ５２が接続されている。The sewing machine of this embodiment is equipped with a control device shown in FIG. 6, that is, a central processing unit (hereinafter referred to as CPU).
44 includes a ROM 45 that stores the sewing machine control program 4 and a RAM as a working memory.
46 are electrically connected. Also, CP tJ 4
The cutting air cylinder 24, the thread gripping air cylinder 30, and the tensioning air cylinder 39 are connected to the air cylinder 4 through opening/closing valves 47, 48, and 49, respectively, and further,
A sewing machine motor 50 for driving the sewing machine, a suction valve 51 that generates an intake air flow in the air passage 10 to suck the empty ring R, and an ejection valve that generates a jet air flow in the air passage 10 to move the empty ring R. 52 are connected.
尚、空気通路１０、吸引バルブ５１等により吸引装置が
構成され、空気通路１０、噴出バルブ５２等により移動
手段が構成されている。Note that the air passage 10, the suction valve 51, etc. constitute a suction device, and the air passage 10, the ejection valve 52, etc. constitute a moving means.
次に、上述のように構成されたミシンの作用について説
明する。Next, the operation of the sewing machine configured as described above will be explained.
ミシン運転中においては、摺動プレート２２は左端位置
に配置され、係止部材２６及び張力付与部材３５は、第
５図に示すように、それぞれ係止位置及び係合位置に配
置されている。また、吸引バルブ５１の作動に基づき、
空気通路１０内には５ Ｌ−
吸入空気流が形成され、加工布支持面２上の加工布が押
え足４により送り歯６に押圧されている。During operation of the sewing machine, the sliding plate 22 is placed at the left end position, and the locking member 26 and tension applying member 35 are placed at the locking position and the engaging position, respectively, as shown in FIG. Furthermore, based on the operation of the suction valve 51,
A 5 L- suction air flow is formed in the air passage 10, and the work cloth on the work cloth support surface 2 is pressed against the feed dog 6 by the presser foot 4.
そして、両者４．６の協働によって加工布か第１図のＰ
矢印方向へ移送され、カッター装置７によって加工布の
辺縁が切断された後に、針落下点において針５とルーパ
ーとの協働により縫目が形成される。Then, by the cooperation of both 4.6, the processed cloth is
After being transported in the direction of the arrow and cutting the edge of the work cloth by the cutter device 7, a stitch is formed by the cooperation of the needle 5 and the looper at the needle drop point.
加工布の布送り込み側端部までの縫製が終了すると、一
端にて加工布に連なると共に、他端にて針板爪３ｂを介
して針５に連なる空環Ｒが形成される。そして、この空
環Ｒが所定長さに達しな時、前記吸入空気流により、空
環Ｒが空気通路１０内に吸引され、その状態で空環切断
装置１５が作動されて空環Ｒが加工布から切り離される
。When the sewing up to the cloth feeding side end of the work cloth is completed, a hollow ring R is formed which is connected to the work cloth at one end and connected to the needle 5 at the other end via the throat plate pawl 3b. When the ring R does not reach a predetermined length, the air ring R is sucked into the air passage 10 by the intake air flow, and in this state, the ring cutting device 15 is operated to process the ring R. separated from the cloth.
その後、ＣＰＵ４４はミシンモータ５０を停止させてミ
シンの運転を針上位置で停止させると共に、押え足４を
加工布支持面２から上方へ離間させる。ＣＰＵ４４は吸
引バルブ５１を介して吸引空気流の形成を停止させると
共に、張力付与バルブ４９を介して張力付与エアシリン
ダ３９のビス】６
トン３９ａを突出させ、張力付与部材３５を第３図に示
す退避位置に配置する。更に、ＣＰＵ４４は糸掴み用バ
ルブ４８を介して糸掴み用エアシリンダ３０のピストン
３０ａを没入させ、係止部材２６を第３図に示す規制位
置に配置し、その係止片２６ａを加工布支持面２より上
方へ突出させる。Thereafter, the CPU 44 stops the sewing machine motor 50 to stop the operation of the sewing machine at the needle-up position, and also moves the presser foot 4 upwardly away from the work cloth support surface 2. The CPU 44 stops the formation of the suction air flow through the suction valve 51, and at the same time causes the screw 39a of the tension applying air cylinder 39 to protrude through the tension applying valve 49, and the tension applying member 35 is shown in FIG. Place it in the evacuation position. Furthermore, the CPU 44 retracts the piston 30a of the thread gripping air cylinder 30 via the thread gripping valve 48, places the locking member 26 in the regulating position shown in FIG. Project upward from surface 2.
続いて、ＣＰＵ４４は噴出バルブ５２を介して空気通路
１０内に噴出空気流を形成する。この空気流はラッパ形
に拡開する開口部１０ａの形状に従って、第１図のＡ矢
印方向へ噴出されるため、空環Ｒは針落下点よりも布送
り込み側へ吹き返され、所定時間後にＣＰＵ４４により
噴出バルブ５２を介して空気流の噴出が遮断されると、
空環Ｒの切断端が針落下点を中心とする円弧を描くよう
に第１図のＢ矢印に沿って移動し、前記係止片２６ａの
下側へ達すると共に、係止片２６ａによって移動を規制
されて、凹所２５ａ上に載置される。Subsequently, the CPU 44 forms a jet air flow within the air passage 10 via the jet valve 52 . This air flow is ejected in the direction of arrow A in FIG. 1 according to the shape of the opening 10a that expands into a trumpet shape, so that the air ring R is blown back toward the cloth feed side from the needle drop point, and after a predetermined time, the CPU 44 When the jetting of the air flow is blocked through the jetting valve 52,
The cut end of the empty ring R moves along the arrow B in FIG. 1 in a circular arc centered on the needle drop point, reaches the lower side of the locking piece 26a, and is prevented from moving by the locking piece 26a. It is regulated and placed on the recess 25a.
その後、ＣＰＵ４４は糸掴み用バルブ４８を介して糸掴
み用エアシリンダ３０のピストン３０ａを突出させ、第
４図に示すように、係止部材２６７
を規制位置から係止位置へ切換え配置すると共に、空環
Ｒの端部を凹所２５ａと係止片２６ａとの間に係止する
。次に、ＣＰＵ４４は張力付与バルブ４９を介して張力
付与エアシリンダ３９のピストン３９ａを没入させ、第
５図に示すように、張力付与部材３５を退避位置から係
合位置へ切換え配置する。この張力付与部材３５の切換
えに伴い、張力付与部材３５の係合部３５ａか空環Ｒの
一部に係合して、その空環Ｒが針落下点から離間する方
向へ押し出される。この押し出しにより、係止部材２６
によって係止された空環Ｒの係止部位を固定端として空
環Ｒの弛みが除かれると共に、空環Ｒには適度な張力が
付与されて、針落下点付近において針板爪３ｂに引掛か
らない位置に空環Ｒが確実に配置される。この状態にお
いては、第１図に二点鎖線で示すように、針板爪３ｂと
張力付与部材３５の係合部３５ａとを繋ぐ空環Ｒの経路
は、カッター装置７の切刃７ａ上には配置されない。Thereafter, the CPU 44 causes the piston 30a of the thread gripping air cylinder 30 to protrude via the thread gripping valve 48, and as shown in FIG. 4, switches the locking member 267 from the restriction position to the locking position, and The end of the hollow ring R is locked between the recess 25a and the locking piece 26a. Next, the CPU 44 retracts the piston 39a of the tension applying air cylinder 39 via the tension applying valve 49, and switches the tension applying member 35 from the retracted position to the engaged position as shown in FIG. With this switching of the tension applying member 35, the engaging portion 35a of the tension applying member 35 engages with a part of the hollow ring R, and the hollow ring R is pushed in a direction away from the needle drop point. Due to this extrusion, the locking member 26
The slack of the hollow ring R is removed by using the locking part of the hollow ring R as a fixed end, and an appropriate tension is applied to the hollow ring R, so that the hollow ring R is caught on the throat plate claw 3b near the needle drop point. The empty ring R is reliably placed in a position where it will not occur. In this state, as shown by the two-dot chain line in FIG. is not placed.
この後、新な加工布を加工布支持面２上に配置８
して再び縫製動作を行えば、加工布の送り動作に伴って
、前記空環Ｒは加工布の辺縁に縫い込まれる。ｌｌ製再
開に際し、ミシンモータ５０の起動から所定時間経過後
、ＣＰＵ４４は切断用バルブ４７を介して切断用エアシ
リンダ２４のピストン２４ａを突出させ、摺動プレート
２２と共に支持ブロック２５を右端位置（第１図工点鎖
線位置）に移動させる。この移動に伴い、針板爪３ｂと
張力付与部材３５の係合部３５ａとを繋ぐ空環Ｒの経路
は、カッター装置７の切刃７ａ上に配置され、カッター
装置７による加工布辺縁の切断と同時に空環Ｒか切断さ
れる。こうして、新な加工布に縫い込まれる空環Ｒの長
さが所定長さに設定された後、摺動プレート２２及び支
持ブロック２５は左端位置に復帰される。Thereafter, when a new work cloth is placed 8 on the work cloth support surface 2 and the sewing operation is performed again, the hollow ring R is sewn into the edge of the work cloth as the work cloth is fed. When restarting the machine, after a predetermined period of time has passed since the start of the sewing machine motor 50, the CPU 44 causes the piston 24a of the cutting air cylinder 24 to protrude via the cutting valve 47, and moves the support block 25 together with the sliding plate 22 to the right end position (first position). 1 (dotted chain line position). Along with this movement, the path of the hollow ring R connecting the throat plate pawl 3b and the engaging part 35a of the tension applying member 35 is arranged on the cutting blade 7a of the cutter device 7, and the edge of the work cloth is cut by the cutter device 7. At the same time as the cutting, the empty ring R is also cut. In this way, after the length of the hollow ring R to be sewn into the new work cloth is set to a predetermined length, the sliding plate 22 and the support block 25 are returned to the left end position.
上述のように、本実施例では、通常の縫製時や、空環切
断端を保持した場合には、係止部材２６及び張力付与部
材３５が加工布支持面２上に突出していないため、それ
らが加工布の取扱いの邪魔にならず、加工布のセットや
送りを円滑に行うこと９
ができる。また、従来とは異なり、空環切断後に、その
端部をエアによって加工布支持面２上の開［１に導入す
る必要がないため、空環切断端を所要の位置に確実に保
持することができる。As described above, in this embodiment, the locking member 26 and the tension applying member 35 do not protrude above the work cloth support surface 2 during normal sewing or when the cut end of the empty ring is held. The work cloth does not get in the way of handling the work cloth, and the work cloth can be set and fed smoothly9. In addition, unlike conventional methods, after cutting the hollow ring, there is no need to introduce the end of the ring into the opening [1] on the workpiece cloth support surface 2 by air, so that the cut end of the hollow ring can be reliably held at the desired position. I can do it.
更に、空環切断端を係止部材２６にて保持した状態で、
張力付与部材３５により空環Ｒを更に布送り込み側へ押
出することかできるため５空環Ｒの弛みを除くことがで
き、また、空環Ｒに適度な張力を付与して、針落下点付
近において空環Ｒが針板爪３ｂ等に引掛からないように
位置決めすることができる。従って、空環Ｒを加工布に
対し、確実にかつ安定して縫い込むことができる。Furthermore, with the cut end of the empty ring held by the locking member 26,
Since the tension applying member 35 can further push out the hollow ring R toward the cloth feeding side, the slack of the five hollow rings R can be removed, and an appropriate tension can be applied to the hollow ring R so that the hollow ring R can be pushed out near the needle drop point. It is possible to position the empty ring R so that it does not get caught on the throat plate claw 3b or the like. Therefore, the hollow ring R can be sewn into the work cloth reliably and stably.
また、支持ブロック２５を摺動プレート２２と共に一体
移動可能にすると共に、右端位置へ移動した時に空環Ｒ
がカッター装置７によって切断されるようにしたことに
より、支持ブロック２５の移動タイミングを変更すると
いう簡単な調整操作で、加工布に縫い込まれる空環Ｒの
長さを所望の長さに設定することができる。In addition, the support block 25 is made movable together with the sliding plate 22, and the empty ring R when moved to the right end position.
is cut by the cutter device 7, so that the length of the hollow ring R to be sewn into the work cloth can be set to a desired length by a simple adjustment operation of changing the movement timing of the support block 25. be able to.
尚、本実施例は前記実施例に限定されるもので０
はなく、各エアシリンダに代えて電磁ソレノイドを使用
することも可能である。Note that this embodiment is not limited to the above embodiment, and it is also possible to use electromagnetic solenoids in place of each air cylinder.
［発明の効果］
以上詳述したように本発明によれば、空環切断端を針落
下点よりも布送り込み側で保持するに際して、加工布支
持面よりも上方へ常に突出する部材を設ける必要がなく
、加工布の取り扱いを容易に行うことかできると共に、
空環切断端の保持を確実に行い、しかも空環に適度な張
力を付与して縫い上がりを一定させることができるとい
う優れた効果を奏する。[Effects of the Invention] As detailed above, according to the present invention, when holding the cut end of the hollow ring on the cloth feeding side rather than the needle drop point, it is not necessary to provide a member that always projects above the work cloth support surface. This makes it easier to handle processed fabrics, and
This has the excellent effect of reliably holding the cut end of the hollow ring, applying appropriate tension to the hollow ring, and making the stitching uniform.
第１図は本発明を具体化したミシンの一部切欠平面図、
第２図は要部右側面図、第３図は要部左側面図、第４図
及び第５図は作動状態を示す説明図、第６図はミシンの
電気的構成を示すブロック図である。
２・・・加工布支持面、１０・・・空気通路、１５・・
・空環切断装置、２６・・・係止部材、２８・・・連結
リンク、３０・・・糸掴み用エアシリンダ、３１・・・
連結具（前１
記２８，３０．３１により第一駆動手段が構成される）
、３５・・・張力付与部材、３７・・・作動杆、３９・
・・張力付与エアシリンダ、４０・・・伝達部材（前記
３７，３９．４０により第二駆動手段が構成される）、
５１・・・吸引バルブ（前記１０．５１等により吸引装
置が構成される）、５２・・・噴出バルブ（前記１０．
５２等により移動手段が構成される）、Ｒ・・・空環。FIG. 1 is a partially cutaway plan view of a sewing machine embodying the present invention;
Fig. 2 is a right side view of the main part, Fig. 3 is a left side view of the main part, Figs. 4 and 5 are explanatory diagrams showing the operating state, and Fig. 6 is a block diagram showing the electrical configuration of the sewing machine. . 2...Working cloth support surface, 10...Air passage, 15...
- Empty ring cutting device, 26...Locking member, 28...Connection link, 30...Air cylinder for thread gripping, 31...
Connector (first driving means is constituted by 28 and 30.31 in 1 above)
, 35... Tension applying member, 37... Operating rod, 39...
... Tension applying air cylinder, 40 ... transmission member (the second driving means is constituted by the above-mentioned 37, 39, 40),
51... Suction valve (a suction device is constituted by the above 10.51 etc.), 52... Ejection valve (the above 10.
52 etc.), R...Empty ring.
Claims (1)
下点の布送り出し側へ向って吸引する吸引装置（１０、
５１）と、その吸引装置（１０、５１）によって吸引さ
れた糸の空環（Ｒ）を切断する切断装置（１５）とを備
えたオーバーロックミシンにおいて、 前記針落下点よりも布送り出し側に配置され、エアを噴
出することにより、前記切断装置（１５）によって切断
された空環（Ｒ）を針落下点よりも布送り込み側へ移動
させる移動手段（１０、５２）と、 針落下点よりも布送り込み側にて加工布支持面（２）上
に突出し、前記移動手段（１０、５２）により移動され
た空環（Ｒ）に当接してその空環（Ｒ）の位置を規制す
る規制位置と、加工布支持面（２）内に倒状し、空環（
Ｒ）を加工布支持面（２）上に係止する係止位置とに切
換え配置可能に設けられた係止部材（２６）と、 前記移動手段（１０、５２）による空環（Ｒ）の移動時
に前記係止部材（２６）を規制位置に配置させると共に
、空環（Ｒ）の移動動作後に係止位置へ切り換える第一
駆動手段（２８、３０、３１）と、 針落下点よりも布送り込み側にて前記係止部材（２６）
によって位置規制された空環（Ｒ）から離間する退避位
置と、前記係止部材（２６）によって係止された空環（
Ｒ）に係合してその空環（Ｒ）に張力を付与する係合位
置とに切換え配置可能に設けられた張力付与部材（３５
）と、前記係止部材（２６）が係止位置に配置された後
に、張力付与部材（３５）を退避位置から係合位置へ切
り換える第二駆動手段（３７、３９、４０）と を備えたことを特徴とするバックタック縫製可能なオー
バーロックミシン。[Claims] 1. A suction device (10,
51) and a cutting device (15) for cutting the empty ring (R) of the yarn sucked by the suction device (10, 51), the overlock sewing machine includes a moving means (10, 52) that moves the empty ring (R) cut by the cutting device (15) to the fabric feeding side from the needle drop point by blowing out air; A regulation member that protrudes above the work cloth support surface (2) on the cloth feeding side and contacts the empty ring (R) moved by the moving means (10, 52) to regulate the position of the empty ring (R). position, inverted within the work cloth support surface (2), and an empty ring (
a locking member (26) which is provided so as to be switchable to a locking position for locking the ring (R) on the work cloth support surface (2); a first drive means (28, 30, 31) for arranging the locking member (26) in the regulating position during movement and switching it to the locking position after the movement of the empty ring (R); The locking member (26) on the feeding side
and a retracted position where the air ring (R) is separated from the air ring (R) whose position is regulated by
A tension applying member (35
), and a second driving means (37, 39, 40) for switching the tension applying member (35) from the retracted position to the engaged position after the locking member (26) is placed in the locked position. An overlock sewing machine capable of back tack sewing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23783589A JP2722712B2 (en) | 1989-09-13 | 1989-09-13 | Backlock sewing overlock sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23783589A JP2722712B2 (en) | 1989-09-13 | 1989-09-13 | Backlock sewing overlock sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0399693A true JPH0399693A (en) | 1991-04-24 |
| JP2722712B2 JP2722712B2 (en) | 1998-03-09 |
Family
ID=17021117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23783589A Expired - Lifetime JP2722712B2 (en) | 1989-09-13 | 1989-09-13 | Backlock sewing overlock sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2722712B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103699A (en) * | 2011-11-11 | 2013-05-15 | 顾飞龙 | Cup seaming machine automatic trimming device |
-
1989
- 1989-09-13 JP JP23783589A patent/JP2722712B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103699A (en) * | 2011-11-11 | 2013-05-15 | 顾飞龙 | Cup seaming machine automatic trimming device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2722712B2 (en) | 1998-03-09 |
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