JP3654350B2 - Weft pullback control method - Google Patents

Weft pullback control method Download PDF

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Publication number
JP3654350B2
JP3654350B2 JP2001210297A JP2001210297A JP3654350B2 JP 3654350 B2 JP3654350 B2 JP 3654350B2 JP 2001210297 A JP2001210297 A JP 2001210297A JP 2001210297 A JP2001210297 A JP 2001210297A JP 3654350 B2 JP3654350 B2 JP 3654350B2
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weft
loom
pullback
storage device
weft insertion
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JP2003020544A (en
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憲治 清原
智一 石田
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Tsudakoma Corp
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Tsudakoma Industrial Co Ltd
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Priority to CN 02141045 priority patent/CN1283862C/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Description

【０００１】
【発明が属する技術分野】
本発明は、給糸体から引き出された緯糸を貯留する緯糸貯留装置と緯入れノズルとの間で、緯糸を引き戻す装置の制御方法に関する。
【０００２】
【従来の技術】
実開平６−７９７７８号公報の技術は、流体噴射式織機において、緯糸貯留装置と緯入れノズルとの間に、緯糸を引き戻す装置を設けている。その引き戻し装置は、緯入れ終了後に、緯糸引き戻し装置を構成する固定ガイドと可動ガイドとの協動により、緯糸貯留装置と緯入れノズルとの間に連なる緯糸を屈曲状態とし、先端側の緯糸を引き戻すことにより、緯入れノズル先端から突出する緯糸が長くならないようにして、次回の緯入れの安定化を図っている。
【０００３】
【発明が解決しようとする課題】
上記の技術で、緯糸の引き戻し動作は、織機の運転中のほか、停止中も続行される。織機の運転中に、例えば重めの緯糸やガラス糸等を緯入れする場合、緯糸貯留装置と緯入れノズルとの間に形成される緯糸のバルーンの径が大きく、バルーンの円周方向に作用する力が大きいため、緯入れ終了後に緯糸の引き戻しが行われても、緯糸のバルーンは、完全に消滅せず、少し形成されたまま次の緯入れが行われる（図１参照）。
【０００４】
ところが、織機が停止すると、上記バルーンは、完全に消滅する。このとき、バルーン（弓なり状の湾曲）の形成に相当する長さ分の緯糸が緯入れノズルの微噴射により緯入れ方向に移動するため、織機の停止時に、緯糸は、緯入ノズルの先端から長く突出することになる（図２参照）。
【０００５】
緯入れノズル先端から長く突出した緯糸の先端部は、織機の再起動前の口合わせ操作時に開口内に進入して、織布中に織り込まれたり、経糸に絡んだりして、織り欠点となりやすい。
【０００６】
したがって、本発明の目的は、この種の緯糸引き戻し装置において、織機の停止中を含め緯入れ待機状態にある時、緯糸の先端部が緯入れノズル先端から長く突出しないようにすることである。
【０００７】
【課題を解決するための手段】
上記目的のもとに、本発明は、織機の運転中に給糸体から引き出された緯糸が巻き付けられて貯留されるドラムおよび緯入れに伴う前記ドラム上からの緯糸の引き出しを阻止する係止ピンを備えた緯糸貯留装置と、該緯糸貯留装置と緯入れノズルとの間に連なる緯糸の先端を緯入れノズル内に引き戻すべく緯糸を屈曲させる可動ガイド及びこの可動ガイドを駆動するアクチュエータを含む引き戻し装置と、該引き戻し装置のアクチュエータの作動を制御する引き戻しコントローラとを備えた流体噴射式織機において、織機の停止から織機の再起動後の最初の緯入れ開始までの期間のうちの少なくとも特定の期間中に、前記係止ピンによって緯糸貯留装置からの引き出しが阻止されている緯糸の引き戻し装置による引き戻し量を、織機の運転中の引き戻し量より増大させるように前記引き戻しコントローラが前記アクチュエータの作動の制御を行う。
【０００８】
ここで、上記「特定の期間」とは、（１）織機の停止から再起動後の最初の緯入れ開始までの全期間、（２）織機の停止中の全期間、（３）織機の寸動運転中の少なくとも経糸が閉口する期間、（４）緯入れ開始直前の期間、（５）その他の所望の期間、および（６）上記（１）〜（５）の２以上の組み合わせ期間を含むものとする。
【０００９】
また、本発明は、緯糸貯留装置と緯入れノズルとの間に、１本の緯糸に対して作用する複数の緯糸引き戻し装置を備え、それらの緯糸引き戻し装置のうち、少なくとも１つの緯糸引き戻し装置は、織機の運転中および停止中ともに１本の緯糸に対して作動し、かつ、少なくとも１つの緯糸引き戻し装置は、織機の停止中にのみ前記と同じ１本の緯糸に対して作動する。これにより、織機の停止から織機の再起動後の最初の緯入れ開始までの期間のうち、少なくとも特定の期間中の緯糸引き戻し量は、織機の運転中の緯糸引き戻し量より増大する。
【００１０】
【発明の実施の形態】
図１および図２は、流体噴射式の織機１の緯入れの主要部を示している。流体噴射式の織機１は、緯入れ手段として、緯糸貯留装置２、緯入れノズル３および緯糸引き戻し装置４を備えている。
【００１１】
緯糸５は、給糸体６から引き出され、緯糸貯留装置２の回転ガイド７の内部に案内され、回転ガイド７の回転によりドラム９の外周面に対して係止ピン８により係止されて巻き付けられ、緯入れ時点まで貯留される。なお、係止ピン８は、操作器１０によって進退方向に操作されるようになっている。
【００１２】
そして、緯糸５は、緯糸引き戻し装置４を経由して、緯入れノズル３の内部に通されている。緯糸引き戻し装置４は、緯糸貯留装置２と緯入れノズル３との間に設けられ、緯入れノズル３の内部の緯糸５の先端を引き戻すために、２本の固定ガイド１１、１２、これらの２本の固定ガイド１１、１２の間で変位可能な可動ガイド１３、この可動ガイド１３を駆動するための例えば回転式のアクチュエータ１４、および引き戻しコントローラ１５によって構成されている。
【００１３】
固定ガイド１１、１２は、図示しない機台などに固定されている。また、可動ガイド１３は、アクチュエータ１４の軸などに取り付けられ、それを中心として回動することにより、一方の固定ガイド１１から可動ガイド１３を経て他方の固定ガイド１２に至るまでの緯糸５の屈曲長さを大きくすることによって、緯入れノズル３の内部の緯糸５を引き戻す。
【００１４】
アクチュエータ１４は、引き戻しコントローラ１５からの出力により駆動されるようになっている。すなわち、引き戻しコントローラ１５は、織機コントローラ１６からの運転信号Ｓ１およびタイミング信号Ｓ３を入力として、図１に示すように、織機１の運転中に、緯入れ後、緯糸５を給糸カッタ２２により切断した時点からつぎの緯入れ直前までの期間で、アクチュエータ１４を反時計方向に回動させ、可動ガイド１３を２本の固定ガイド１１、１２から離れさせることによって、緯入れノズル３の内部に通されている緯糸５の先端を所定の緯糸引き戻し量だけ引き戻す。
【００１５】
また、織機１の停止時にも、引き戻しコントローラ１５は、織機コントローラ１６からの停止信号Ｓ２およびタイミング信号Ｓ３を入力として、図２に示すように、同様な動作を行い、緯糸５の先端を緯入れノズル３の内部に所定の緯糸引き戻し量だけ引き込むことによって、緯糸５の先端の織布２４への織り込みを防止する。
【００１６】
なお、織機コントローラ１６は、織機エンコーダ１７によって織機１の主軸１８の回転角度を検出し、タイミング信号Ｓ３を引き戻しコントローラ１６に送り込んでいるほか、織機１に必要な制御を実行していく。なお、引き戻しコントローラ１５の内部の詳細な構成は、後に図４で例示する。
【００１７】
織機１の運転中には、図１に示すように、緯糸貯留装置２と固定ガイド１１との間で、緯糸５のバルーン（弓なり状の湾曲）が残存しているため、緯糸５に遠心力が作用し、これによって、緯糸５の先端は、緯入れノズル３からほとんど突出していない。しかし、織機１が停止すると、その位置でバルーン（弓なり状の湾曲）が形成されず、消滅するため、緯糸５は、運転中と同様に、所定の緯糸引き戻し量だけ引き戻されたとしても、緯入れノズル３の微噴射によって、バルーンの消滅分だけ緯入れノズル３の先端から突出する。この現象によって、織機１の停止中の修復作業中に、緯入れノズル３の先端の緯糸５が織布２４の織り前に織り込まれたり、あるいは緯糸５の先端が給糸カッタ２２や経糸２３などに絡み合って、織り欠点が発生し易くなる。
【００１８】
そこで、引き戻しコントローラ１５は、本発明の緯糸引き戻し制御方法にもとづいて、織機１の停止から、織機１の再起動後の最初の緯入れ開始までの期間のうち、少なくとも特定の期間中に、緯糸引き戻し装置４を動作させ、緯糸引き戻し量を織機１の運転中の緯糸引き戻し量よりも増大させ、緯入れノズル３の微噴射に起因して、緯入れノズル３からバルーン消滅分に相当する緯糸５の突出を防止する。
【００１９】
したがって、織機１の停止から織機１の再起動後の最初の緯入れ開始までの期間で、特定の期間中に、緯糸５は、緯入れノズル３の先端から必要以上に突出せず、織布２４への織り込み、給糸カッタ２２や経糸２３などなどに対して絡みつかないことになる。
【００２０】
ここで、織機１の停止から織機１の再起動後の最初の緯入れ開始までの期間のうち、「特定の期間」は、図３に示す通り、（１）織機の停止から再起動後の最初の緯入れ開始までの全期間、（２）織機の停止中の全期間、（３）織機の寸動運転中の少なくとも経糸が閉口する期間、（４）緯入れ開始直前の期間、（５）その他の所望の期間、および（６）上記（１）〜（５）の２以上の組み合わせ期間をいう。
【００２１】
図４は、引き戻しコントローラ１５の具体例を示す。引き戻しコントローラ１５は、設定器１９、引き戻し制御器２０および駆動増幅器２１によって構成されている。オペレーターは、設定器１９を操作して、予め織機１の運転中における引き戻し量および停止中における引き戻し量を糸種毎に設定するとともに、織機１の運転中の引き戻し期間の開始および終了、ならびに織機１の停止中の特定期間の開始および終了を主軸１８の回転角度により設定し、引き戻し制御器２０の記憶エリアに記憶させておく。
【００２２】
織機１の運転中に、引き戻し制御器２０は、タイミング信号Ｓ３から主軸１８の回転角度を検出し、指定された引き戻し期間の間、駆動増幅器２１を駆動し、可動ガイド１３を反時計方向に回動させることによって、緯入れノズル３の内部の緯糸５を引き戻す。
【００２３】
また、運転信号Ｓ１が停止信号Ｓ２に切り換わったときに、引き戻し制御器２０は、予め指定された特定の期間中に、緯糸引き戻し装置４による緯糸引き戻し量を織機１の運転中の引き戻し量よりも増大させる。したがって、織機１が停止し、緯糸貯留装置２と固定ガイド１１との間でバルーンが消滅したとき、このバルーンの消滅量に相当する長さ分だけ緯糸５が緯糸引き戻し装置４によって余計に引き戻されるため、織機１の停止中における緯入れノズル３の微噴射によっても、緯糸５の先端は、緯入れノズル３から長く飛び出さない。このため、緯糸５の先端の織布２４への織り込みや、織機１の修復中での給糸カッタ２２、経糸２３などへの緯糸５の絡みつきが未然に防止できる。
【００２４】
つぎに、図５は、緯糸貯留装置２と緯入れノズル３との間に複数、一例として２つの緯糸引き戻し装置４ａ、４ｂを設け、それらの引き戻し装置４ａ、４ｂのうち少なくとも１つ例えば緯入れノズル３に近い側の緯糸引き戻し装置４ａを織機１の運転中および停止中ともに一定の緯糸引き戻し量より１本の緯糸５に対して作動させ、かつ少なくとも他の１つの緯糸貯留装置２に近い側の緯糸引き戻し装置４ｂを織機１の停止中にのみ一定の緯糸引き戻し量より前記と同じ１本の緯糸５に対して作動させる例である。もちろん、この設定は、一例であるから、緯糸引き戻し装置４ａ、４ｂは、図と逆の配置とすることもできる。
【００２５】
なお、以上の具体例は、アクチュエータ１４を回転式のものとして説明しているが、このアクチュエータ１４は、直動式のものとして構成することもできる。また、緯糸引き戻し装置４の設置数は、１または２に限らず、３以上でよく、緯糸引き戻し量を考慮して決定する。さらに、多色緯入れでは、緯糸引き戻し装置４は、緯糸５ごとに設けられる。
【００２６】
【発明の効果】
請求項１によれば、緯糸引き戻し装置を備えた流体噴射式の織機において、織機の停止から織機の再起動後の最初の緯入れ開始までの期間のうち、少なくとも特定の期間中に、緯糸引き戻し装置による緯糸引き戻し量を織機の運転中の緯糸引き戻し量より増大させるから、織機の停止後に、残留したバルーンの消滅に伴い、緯糸が緯入れ方向に移動し緯糸先端部が緯入ノズル先端から長く突出しようとしても、緯糸の引き戻し量を増大させることにより、それを防ぐことができる。したがって、織機の再起動前の口合わせ操作時などに、緯糸先端部が開口内に進入し織り込まれたり、他のものに絡んだりすることがないので、織物欠点が防止できる。
【００２７】
請求項２によれば、複数の緯糸引き戻し装置を備え、それらの緯糸引き戻し装置のうち、少なくとも１つの緯糸引き戻し装置は、織機の運転中および停止中ともに１本の緯糸に対して作動し、かつ、少なくとも１つの緯糸引き戻し装置は、織機停止中のみ前記と同じ１本の緯糸に対して作動するから、緯糸の引き戻し量に制限を受けることなく、織機の運転中および停止中ともに、緯糸に所望の屈曲量を与えて、所望の緯糸引き戻し量を得ることができる。
【図面の簡単な説明】
【図１】 本発明の緯糸引き戻し制御方法を実施するための流体噴射式の織機（緯糸貯留装置、緯入れノズル、緯糸引き戻し装置、引き戻しコントローラおよび織機コントローラ）で、次の緯入れ直前のバルーン残存状態の説明図である。
【図２】 本発明の緯糸引き戻し制御方法を実施するための流体噴射式の織機（緯糸貯留装置、緯入れノズル、緯糸引き戻し装置、引き戻しコントローラおよび織機コントローラ）で、停止中のバルーン消滅状態の説明図である。
【図３】 本発明の緯糸引き戻し制御方法で、織機の停止から織機の再起動後の最初の緯入れ開始までの期間のうち特定の期間の説明図である。
【図４】 引き戻しコントローラのブロック線図である。
【図５】 本発明の緯糸引き戻し制御方法を実施するための流体噴射式の織機（緯糸貯留装置、緯入れノズル、２つの緯糸引き戻し装置）の説明図である。
【符号の説明】
１ 流体噴射式の織機
２ 緯糸貯留装置
３ 緯入れノズル
４、４ａ、４ｂ 緯糸引き戻し装置
５ 緯糸
６ 給糸体
７ 回転ガイド
８ 係止ピン
９ ドラム
１０ 操作器
１１ 固定ガイド
１２ 固定ガイド
１３ 可動ガイド
１４ アクチュエータ
１５ 引き戻しコントローラ
１６ 織機コントローラ
１７ 織機エンコーダ
１８ 主軸
１９ 設定器
２０ 引き戻し制御器
２１ 駆動増幅器
２２ 給糸カッタ
２３ 経糸
２４ 織布[0001]
[Technical field to which the invention belongs]
The present invention relates to a control method for an apparatus for pulling back a weft yarn between a weft storage device that stores the weft drawn from a yarn feeder and a weft insertion nozzle.
[0002]
[Prior art]
In the technique of Japanese Utility Model Publication No. 6-79778, a fluid jet loom is provided with a device for pulling back the weft between the weft storage device and the weft insertion nozzle. When the weft insertion is completed, the weft thread that is connected between the weft storage device and the weft insertion nozzle is bent by the cooperation of the fixed guide and the movable guide that constitute the weft retracting apparatus, and the weft thread on the tip side is removed. By pulling back, the weft thread protruding from the tip of the weft insertion nozzle does not become long, so that the next weft insertion is stabilized.
[0003]
[Problems to be solved by the invention]
With the above technique, the weft pullback operation is continued not only during operation of the loom but also during stoppage. For example, when wefting heavy wefts or glass yarns during loom operation, the diameter of the weft balloon formed between the weft storage device and the weft insertion nozzle is large and acts in the circumferential direction of the balloon. Therefore, even if the weft is pulled back after the weft insertion is completed, the weft balloon does not disappear completely, and the next weft insertion is performed with a little formed (see FIG. 1).
[0004]
However, when the loom stops, the balloon disappears completely. At this time, since the weft of the length corresponding to the formation of the balloon (bow-like curve) moves in the weft insertion direction by the fine injection of the weft insertion nozzle, the weft is released from the tip of the weft insertion nozzle when the loom stops. It will protrude long (refer FIG. 2).
[0005]
The tip of the weft that protrudes long from the tip of the weft insertion nozzle enters the opening during the mouth-matching operation before restarting the loom, and is woven into the woven fabric or entangled with the warp, which tends to be a woven defect. .
[0006]
Accordingly, an object of the present invention is to prevent the tip of the weft from protruding long from the tip of the weft insertion nozzle when this type of weft pullback device is in a weft insertion standby state including when the loom is stopped.
[0007]
[Means for Solving the Problems]
Based on the above object, the present invention provides a drum in which the weft drawn from the yarn feeder is wound during operation of the loom, and a latch that prevents the weft from being pulled out from the drum when the weft is inserted. and weft storing device having a pin, the movable guide and the actuator for driving the movable guide to the tip of the weft yarn by bending the weft yarn in order to return pull weft insertion nozzle continuing between the weft yarn accumulating device and the weft insertion nozzle A fluid-jet loom comprising a pull-back device including a pull- back controller that controls the operation of an actuator of the pull- back device, and at least identification of a period from the stop of the loom to the start of the first weft insertion after the loom is restarted during the, amount pullback by draw-back device of the drawer is prevented weft from the weft storage unit by the locking pin, during loom operation The pull-back controller to increase from the amount of pulling back performs control of operation of the actuator.
[0008]
Here, the above-mentioned “specific period” means (1) the entire period from the stop of the loom to the start of the first weft insertion after the restart, (2) the entire period during the stop of the loom, and (3) the dimensions of the loom. Including at least a period during which the warp is closed during dynamic operation, (4) a period immediately before the start of weft insertion, (5) other desired period, and (6) two or more combined periods of (1) to (5) Shall be.
[0009]
In addition, the present invention includes a plurality of weft pullback devices that act on one weft between the weft storage device and the weft insertion nozzle, and among these weft pullback devices, at least one weft pullback device is The loom operates on one weft both during operation and stoppage, and at least one weft pullback device operates on the same one weft as described above only while the loom is stopped. As a result, during the period from the stop of the loom to the start of the first weft insertion after the loom is restarted, the weft pullback amount at least during a specific period is larger than the weft pullback amount during operation of the loom.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show the main part of the weft insertion of the fluid jet loom 1. The fluid jet loom 1 includes a weft storage device 2, a weft insertion nozzle 3, and a weft pullback device 4 as weft insertion means.
[0011]
The weft 5 is pulled out from the yarn supply body 6 and guided inside the rotation guide 7 of the weft storage device 2. The rotation guide 7 rotates to lock the outer periphery of the drum 9 by the locking pin 8 and wind it. Stored until the weft insertion time. The locking pin 8 is operated in the forward / backward direction by the operating device 10.
[0012]
The weft 5 is passed through the weft insertion nozzle 3 via the weft pulling-back device 4. The weft pullback device 4 is provided between the weft storage device 2 and the weft insertion nozzle 3, and in order to pull back the tip of the weft 5 inside the weft insertion nozzle 3, two fixed guides 11, 12, The movable guide 13 is configured to be displaceable between the fixed guides 11 and 12, for example, a rotary actuator 14 for driving the movable guide 13, and a pullback controller 15.
[0013]
The fixed guides 11 and 12 are fixed to a machine base (not shown). Further, the movable guide 13 is attached to the shaft of the actuator 14 and the like, and is rotated about the movable guide 13 to bend the weft 5 from the one fixed guide 11 to the other fixed guide 12 through the movable guide 13. By increasing the length, the weft thread 5 inside the weft insertion nozzle 3 is pulled back.
[0014]
The actuator 14 is driven by the output from the pull-back controller 15. That is, the pull-back controller 15 receives the operation signal S1 and the timing signal S3 from the loom controller 16, and cuts the weft 5 by the yarn feed cutter 22 after weft insertion during operation of the loom 1, as shown in FIG. The actuator 14 is rotated counterclockwise during the period from the point of time until immediately before the next weft insertion to move the movable guide 13 away from the two fixed guides 11, 12, thereby passing the inside of the weft insertion nozzle 3. The tip of the weft 5 is pulled back by a predetermined weft pullback amount.
[0015]
When the loom 1 is stopped, the pull-back controller 15 receives the stop signal S2 and the timing signal S3 from the loom controller 16 and performs the same operation as shown in FIG. By pulling in the nozzle 3 by a predetermined weft pullback amount, weaving of the tip of the weft 5 into the woven fabric 24 is prevented.
[0016]
The loom controller 16 detects the rotation angle of the main shaft 18 of the loom 1 by the loom encoder 17, sends the timing signal S3 back to the controller 16, and executes the control necessary for the loom 1. The detailed configuration inside the pull-back controller 15 will be exemplified later with reference to FIG.
[0017]
During operation of the loom 1, as shown in FIG. 1, since the balloon (bow-shaped curve) of the weft 5 remains between the weft storage device 2 and the fixed guide 11, centrifugal force is exerted on the weft 5. As a result, the tip of the weft 5 hardly protrudes from the weft insertion nozzle 3. However, when the loom 1 stops, a balloon (bow-like curve) is not formed at that position and disappears, so that the weft 5 may be retracted by a predetermined weft pullback amount as in the operation. By the fine injection of the insertion nozzle 3, it protrudes from the tip of the weft insertion nozzle 3 by the amount of disappearance of the balloon. Due to this phenomenon, the weft thread 5 at the tip of the weft insertion nozzle 3 is woven before weaving the woven fabric 24 during the repairing operation while the loom 1 is stopped, or the tip of the weft thread 5 is the yarn feeding cutter 22 or warp yarn 23. Intertwined with each other, weaving defects are likely to occur.
[0018]
Therefore, the pull-back controller 15 is based on the weft pull-back control method of the present invention, and at least during a specific period of the period from the stop of the loom 1 to the start of the first weft insertion after the loom 1 is restarted. By operating the pull-back device 4, the weft pull-back amount is increased more than the weft pull-back amount during operation of the loom 1, and the weft 5 corresponding to the balloon disappearance from the weft insertion nozzle 3 due to the fine injection of the weft insertion nozzle 3. Prevent overhang.
[0019]
Accordingly, during a specific period from the stop of the loom 1 to the start of the first weft insertion after the loom 1 is restarted, the weft 5 does not protrude more than necessary from the tip of the weft insertion nozzle 3, and the woven fabric 24, the yarn feeding cutter 22, the warp 23, and the like are not entangled.
[0020]
Here, among the period from the stop of the loom 1 to the start of the first weft insertion after the restart of the loom 1, the “specific period” is (1) after the loom is stopped and restarted as shown in FIG. The total period until the start of the first weft insertion, (2) the entire period when the loom is stopped, (3) the period during which at least the warp is closed during the inching operation of the loom , (4) the period immediately before the start of weft insertion, (5 ) Other desired periods, and (6) Two or more combined periods of (1) to (5) above.
[0021]
FIG. 4 shows a specific example of the pull-back controller 15. The pullback controller 15 includes a setter 19, a pullback controller 20, and a drive amplifier 21. The operator operates the setting device 19 to set the pullback amount during operation of the loom 1 and the pullback amount during stoppage for each yarn type in advance, and start and end of the pullback period during operation of the loom 1, and the loom The start and end of a specific period of 1 stop is set by the rotation angle of the main shaft 18 and stored in the storage area of the pull-back controller 20.
[0022]
During operation of the loom 1, the pull back controller 20 detects the rotation angle of the main shaft 18 from the timing signal S3, drives the drive amplifier 21 during the designated pull back period, and rotates the movable guide 13 counterclockwise. By moving, the weft 5 inside the weft insertion nozzle 3 is pulled back.
[0023]
Further, when the operation signal S1 is switched to the stop signal S2, the pullback controller 20 determines the weft pullback amount by the weft pullback device 4 from the pullback amount during operation of the loom 1 during a specific period specified in advance. Also increase. Accordingly, when the loom 1 is stopped and the balloon disappears between the weft storage device 2 and the fixed guide 11, the weft 5 is further pulled back by the weft retracting device 4 by the length corresponding to the disappearance amount of the balloon. Therefore, even when the weft insertion nozzle 3 is finely jetted while the loom 1 is stopped, the tip of the weft thread 5 does not jump out of the weft insertion nozzle 3 for a long time. For this reason, weaving of the front end of the weft yarn 5 into the woven fabric 24 and entanglement of the weft yarn 5 with the yarn feeding cutter 22 and warp yarn 23 during restoration of the loom 1 can be prevented.
[0024]
Next, FIG. 5 shows that a plurality of, for example, two weft pullback devices 4a and 4b are provided between the weft storage device 2 and the weft insertion nozzle 3, and at least one of these pullback devices 4a and 4b, for example, weft insertion the side of the weft draw-back device 4a closer to the nozzle 3 is created moving relative to one weft 5 than the amount of pulling back together certain weft during and stopping operation of the loom 1, and at least close to the other one of the weft storage unit 2 This is an example in which the side weft pull-back device 4b is operated with respect to the same one weft 5 as described above with a constant weft pull-back amount only while the loom 1 is stopped. Of course, since this setting is an example, the weft pulling-back devices 4a and 4b can be arranged opposite to the drawing.
[0025]
In the above specific examples, the actuator 14 is described as a rotary type, but the actuator 14 may be configured as a direct acting type. The number of weft pullback devices 4 is not limited to 1 or 2, but may be 3 or more, and is determined in consideration of the weft pullback amount. Further, in multi-color weft insertion, the weft pullback device 4 is provided for each weft 5.
[0026]
【The invention's effect】
According to claim 1, in the fluid jet loom equipped with the weft pull-back device, the weft pull-back is performed at least during a specific period from the stop of the loom to the start of the first weft insertion after the loom is restarted. Since the weft pullback amount by the machine is increased from the weft pullback amount during the operation of the loom, the weft thread moves in the weft insertion direction after the loom stops, and the weft tip is longer than the weft insertion nozzle tip. Ku even trying out collision, by increasing the pull-back of the weft, it is possible to prevent it. Therefore, at the time of a mouth-matching operation before restarting the loom, the weft yarn tip does not enter into the opening and is not woven or entangled with other things, so that a fabric defect can be prevented.
[0027]
According to claim 2, a plurality of weft pullback devices are provided, and of these weft pullback devices, at least one weft pullback device operates on one weft both during operation and stop of the loom , and The at least one weft pull-back device operates on the same one weft as described above only when the loom is stopped, so that the weft is desired both during operation and stop of the loom without being limited by the pull-back amount of the weft. Thus, a desired weft pullback amount can be obtained.
[Brief description of the drawings]
FIG. 1 shows a balloon remaining immediately before the next weft insertion in a fluid jet loom (weft storage device, weft insertion nozzle, weft pullback device, pullback controller and loom controller) for carrying out the weft pullback control method of the present invention. It is explanatory drawing of a state.
FIG. 2 is a diagram illustrating a balloon extinction state during a stop in a fluid jet loom (weft storage device, weft insertion nozzle, weft pullback device, pullback controller and loom controller) for carrying out the weft pullback control method of the present invention. FIG.
FIG. 3 is an explanatory diagram of a specific period in a period from the stop of the loom to the start of the first weft insertion after the loom is restarted in the weft pullback control method of the present invention.
FIG. 4 is a block diagram of a pullback controller.
FIG. 5 is an explanatory diagram of a fluid jet loom (weft storage device, weft insertion nozzle, two weft pullback devices) for carrying out the weft pullback control method of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fluid injection type loom 2 Weft storage device 3 Weft insertion nozzle 4, 4a, 4b Weft pullback device 5 Weft 6 Feed body 7 Rotating guide 8 Locking pin 9 Drum 10 Operator 11 Fixed guide 12 Fixed guide 13 Movable guide 14 Actuator 15 Pullback controller 16 Loom controller 17 Loom encoder 18 Spindle 19 Setter 20 Pullback controller 21 Drive amplifier 22 Yarn feed cutter 23 Warp yarn 24 Weaving fabric

Claims (2)

織機の運転中に給糸体から引き出された緯糸が巻き付けられて貯留されるドラムおよび緯入れに伴う前記ドラム上からの緯糸の引き出しを阻止する係止ピンを備えた緯糸貯留装置と、該緯糸貯留装置と緯入れノズルとの間に連なる緯糸の先端を緯入れノズル内に引き戻すべく緯糸を屈曲させる可動ガイド及びこの可動ガイドを駆動するアクチュエータを含む引き戻し装置と、該引き戻し装置のアクチュエータの作動を制御する引き戻しコントローラとを備えた流体噴射式織機において、
織機の停止から織機の再起動後の最初の緯入れ開始までの期間のうちの少なくとも特定の期間中に、前記係止ピンによって緯糸貯留装置からの引き出しが阻止されている緯糸の引き戻し装置による引き戻し量を、織機の運転中の引き戻し量より増大させるように前記引き戻しコントローラが前記アクチュエータの作動を制御することを特徴とする緯糸引き戻し制御方法。A weft storage device provided with a drum in which wefts drawn from the yarn feeder are wound and stored during operation of the loom, and a locking pin for preventing the wefts from being pulled out from the drum when wefts are inserted, and the wefts pullback and apparatus including an actuator for driving the movable guide and the movable guide to bend the weft in order to return pull weft insertion nozzle tip of the weft continuous between the storage device and the weft insertion nozzle, the actuator of the draw-back device In a fluid jet loom comprising a pull back controller for controlling operation ,
Pulling back by the weft pulling-back device, which is prevented from being pulled out from the weft storage device by the locking pin during at least a specific period of time from the stop of the loom to the start of the first weft insertion after the loom is restarted The weft pullback control method , wherein the pullback controller controls the operation of the actuator so that the amount is larger than the pullback amount during operation of the loom. 緯糸貯留装置と緯入れノズルとの間に、１本の緯糸に対して作用する複数の緯糸引き戻し装置を備え、それらの緯糸引き戻し装置のうち、少なくとも１つの緯糸引き戻し装置は、織機の運転中および停止中ともに１本の緯糸に対して作動し、かつ、少なくとも１つの緯糸引き戻し装置は、織機の停止中にのみ前記と同じ１本の緯糸に対して作動することを特徴とする請求項１記載の緯糸引き戻し制御方法。Between the weft storage device and the weft insertion nozzle, a plurality of weft pullback devices acting on one weft are provided, and at least one of these weft pullback devices is used during operation of the loom and operating against both single weft stopped, and at least one weft draw-back device is claimed in claim 1, wherein the operating on the same single weft and the only while the loom is stopped Weft pullback control method.
JP2001210297A 2001-07-11 2001-07-11 Weft pullback control method Expired - Fee Related JP3654350B2 (en)

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EP02013834A EP1310587A3 (en) 2001-07-11 2002-06-21 Weft pullback control method
CN 02141045 CN1283862C (en) 2001-07-11 2002-07-11 Weft haul-back control method

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JP5163301B2 (en) * 2008-06-10 2013-03-13 株式会社豊田自動織機 Operation method of weft retractor in fluid jet loom
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JPS5926554A (en) * 1982-08-04 1984-02-10 日産自動車株式会社 Weft yarn return apparatus in fluid jet type loom
JPH02160950A (en) * 1988-12-15 1990-06-20 Nissan Motor Co Ltd Weft retracting apparatus for loom
IT1248716B (en) * 1990-06-11 1995-01-26 Vamatex Spa DEVICE FOR THE REGULATION OF THE VOLTAGE AND THE RECOVERY OF THE WEFT WIRE IN WEAVING FRAMES
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