EP1383949B1 - Vorrichtung und verfahren zur separierung von fäden aus einer fadenschicht - Google Patents

Vorrichtung und verfahren zur separierung von fäden aus einer fadenschicht Download PDF

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Publication number
EP1383949B1
EP1383949B1 EP02717927A EP02717927A EP1383949B1 EP 1383949 B1 EP1383949 B1 EP 1383949B1 EP 02717927 A EP02717927 A EP 02717927A EP 02717927 A EP02717927 A EP 02717927A EP 1383949 B1 EP1383949 B1 EP 1383949B1
Authority
EP
European Patent Office
Prior art keywords
thread
suction means
thread layer
suction
threads
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
Application number
EP02717927A
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German (de)
English (en)
French (fr)
Other versions
EP1383949A2 (de
Inventor
Stefan Ackermann
Patrik Neff
Armin Ackermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Staeubli AG
Original Assignee
Staeubli AG
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Filing date
Publication date
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Application filed by Staeubli AG filed Critical Staeubli AG
Publication of EP1383949A2 publication Critical patent/EP1383949A2/de
Application granted granted Critical
Publication of EP1383949B1 publication Critical patent/EP1383949B1/de
Anticipated expiration legal-status Critical
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Classifications

    • DTEXTILES; PAPER
    • D03WEAVING
    • D03JAUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00Auxiliary apparatus combined with or associated with looms
    • D03J1/13Auxiliary apparatus combined with or associated with looms for leasing warp
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03JAUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00Auxiliary apparatus combined with or associated with looms
    • D03J1/14Apparatus for threading warp stop-motion droppers, healds, or reeds

Definitions

  • the invention relates to a device for separating a predetermined number of threads from a thread layer in which the threads of the thread layer are clamped at at least two points, and by means of a separating means, a thread can be separated from the thread layer.
  • the invention also relates to a method as described in the preamble of claim 12.
  • Separation or separation of threads is a step that must be performed, for example, for drawing warp threads in harness elements of a loom.
  • the warp threads are stretched in a frame, where they form a warp thread layer together.
  • the individual threads are very close to each other.
  • They should be separated from the layer, i. that they have to be separated from each other.
  • the aim here is to provide a predetermined number of threads, in particular a single thread, for handling for subsequent operations.
  • Another application results in the tying of warp threads of an old, already provided with weft yarn warp, to a new warp thread layer. Again, warp threads are clamped in a frame and must be separated from the layer before knotting by the knotting machine.
  • the foremost thread is separated from a thread layer, for example with a separating needle.
  • the Abteilnadel is hereby lowered with a running substantially perpendicular to the plane of the thread layer movement on the foremost thread of the layer and this detected with a matched to the cross section of the thread trough of the Abteilnadel.
  • Unsatisfactory here is that the storage of a large number of different Abteilnadeln is required because the Abteilnadeln must be very closely matched to the respective yarn size.
  • the separation process is not very reliable. For this reason, in particular in connection with filament yarns, a so-called crosshair is required as a separating aid.
  • the crosshairs must be read into the thread layer beforehand, whereby two lines lying transversely to the warp threads are pulled or woven in between the warp threads. By reciprocating the cross cords, the respective foremost thread is separated from the rest and then separated with the Abteilnadel.
  • a disadvantage of such known methods and devices is to be seen in particular in the fact that the separation with dividing needles at warp threads, which consist of so-called multifilaments, reaches its limits.
  • Also in the method with the crosshairs must be performed for insertion of the cords, for example, by hand or by machine with needles, so that there also occur the problems just described.
  • the warp threads are separated and stored by the crosshairs clean, the insertion of the separation cords an additional and often very expensive operation.
  • EP-A-0 541 268 discloses a device and a method which, as a generic term to claim 1 and appendix 12, represent the closest prior art.
  • the invention is therefore based on the object to provide a device and a method by which the separation of threads from a thread layer with as little effort and steps and still safely can be performed, even if the thread layer difficult to be separated threads, such as untwisted multifilaments.
  • the solution according to the invention can also be used in separation-critical filaments such as, for example, spun-fiber yarns and multifilament yarns, as well as independently of the roughness or filamentiness of the surfaces of the yarns.
  • a control of the device and a control of the sequence of the method according to the invention by a detection device which includes, for example, an image recognition system made.
  • a detection device which includes, for example, an image recognition system made. This makes it possible, for example, to recognize when a thread is in the vicinity of the suction means, and then to regulate a further approach between the suction means and the thread.
  • the detection device can also be determined whether the thread to be separated is detected by the suction and carried away. It can also be determined whether a single thread was actually separated (so-called double-thread recognition). If the detection device determines that the separating operation was unsuccessful, it can cause a control device to repeat the process.
  • a control loop can be formed, which provides that the separating process is repeated until the detection device actually detects a separate thread separated from the suction nozzle. Since only a translational relative movement between the thread layer and the one separating agent is required to separate the threads, the separating process, even when using the control loop, can be done very quickly.
  • the suction means may be provided with a gap, is sucked through the air, wherein the width is smaller than, but at most equal to, an extension of a cross-sectional area of the thread in the direction of the gap width. This can be achieved that a sucked thread is not drawn into the gap, but this closes. This increases on the one hand the suction force with which a thread is held. On the other hand, the gap can thereby be substantially closed, whereby no further threads of the layer are sucked.
  • the thread to be separated from a certain distance to Approach the suction medium by means of a deflection to the suction agent.
  • the suction means with the further clamped between two points of a frame thread this leads away with its holding portion in the suction of the thread layer. This facilitates a transfer of the thread from the suction means to a subsequently used handling device.
  • a thread layer 1 which has a plurality of substantially equal length and parallel threads 2, which are clamped at their ends 3, 4 each in a suitable holder, not shown.
  • Successive threads 2 ideally each have the same distance to each other, but may also be spaced differently, without affecting the operability of the invention.
  • the threads 2 are thus all in one plane, namely the thread layer plane.
  • the thread layer 1 contains no crosshair.
  • Fig. 1 also shows a arranged above the thread layer plane camera 5 and below the thread layer plane provided light source 6 (for example, a light emitting diode), both of which belong to an optical detection device.
  • Camera 5 and light source 6 lie on the same optical axis 7, which is aligned at least substantially orthogonal to the yarn layer plane.
  • a suction means 8 is provided, next to which a partition means, such as the Abteilstatt 9 shown in Fig. 1, is arranged. Both the suction means 8 and the Abteilstatt lie in the detection range of the camera. 5
  • Camera 5, light source 6, suction means 8 and Abteilstatt 9 form in a manner not shown a structural unit, for example by arrangement on a common carrier. These elements can thus be moved parallel to the yarn layer plane with each other.
  • drive means are also provided.
  • the suction means 8 is additionally designed to be movable on the assembly, so that relative movements between the suction means 8 and the camera 5 are possible.
  • the camera 8 may have a CMOS sensor with, for example, 640 x 480 pixels.
  • the number of active picture elements, ie picture elements whose information is taken into account in the signal processing, may be variable in such sensors. Since fewer pixels are required for detail shots of the separation process than for overview shots, and the achievable frame rate increases with decreasing number of pixels, the frame rate can be significantly higher in detail shots than in overview shots. Thus, it is possible to capture very quickly changing situations during the actual Separiervorgang by detail shots and to respond to it.
  • the camera has a first interface which is designed as a serial asynchronous interface, for example a standardized LVDS interface (Low Voltage Differential Signaling). Control signals, such as image size, exposure time, etc., are transmitted to the camera via this interface by a higher-level control device (not shown). The images taken by the camera can then be forwarded via another LVDS interface of the camera to a digital signal processor (DSP).
  • DSP digital signal processor
  • the digital signal processor is common image analysis software available, with which individual threads and their position relative to other threads and against the suction means and the Abteilstatt can be determined.
  • the evaluation result of the digital signal processor is in turn supplied to the control unit, which controls the movements and functions of the suction means 8 and the Abteilstattes on this basis.
  • FIG. 2 shows a cross section through the suction means 8 designed as a suction nozzle 12 as well as threads of the thread layer 1 close to the edge.
  • the suction means 8 constructed symmetrically with respect to the thread layer plane 13 have a conical nozzle section 14 which has two nozzle surfaces 14a, 14b which are inclined towards each other in a funnel shape.
  • An included by the two nozzle surfaces 14a, 14b opening angle ⁇ can be selected from an angular range of, for example, 30 ° to 130 °, preferably to 90 °.
  • the nozzle section 14 opens into a suction gap 15, which is provided with a constant gap width h.
  • the gap width h is smaller than the diameter D of the cross-sectional area of a thread 2.
  • the gap height h is about half as large as the diameter D.
  • a partially shown in Fig. 2 suction chamber 16 connects, in turn, a line 17 (Fig. 1) opens.
  • a pressure p 1 In the suction chamber 16 there is a pressure p 1 , wherein p 1 is smaller than the ambient pressure p 0 .
  • a difference between p 1 and p 0 may be, for example, 0.6 bar.
  • a negative pressure pump or vacuum pump, not shown, or an ejector is connected with which negative pressure can be generated.
  • the assembly with the suction nozzle 12 is approximated by a feed generated by the drive means feed to the foremost thread 2a until the camera 5, the foremost threads 2, at least the foremost thread 2a detecting layer 1.
  • the feeding movement takes place here along the arrow 18, which is aligned within the thread layer plane 13 and substantially orthogonal to the longitudinal course of the threads 2. Since the distance of a thread detected at the outer edge of the detection area of the camera 5 from the suction nozzle 12 is known to a control device, the suction nozzle can now be approximated to the first thread 2a by a predetermined further travel in the feed direction (arrow 18).
  • the nozzle 12 it would also be possible to approach the nozzle 12 to the yarn 2a by means of the control device by means of measurement results of the detection device.
  • the suction nozzle is moved relative to the now stationary camera in the feed direction. The already traversed travel path of the suction means 8 and the respective remaining remaining distance to the yarn 2a can thus be determined with the camera. This condition is shown in FIG.
  • the suction nozzle 12 is guided away from the thread layer 1 together with the thread section held by it in the direction opposite to the feed direction (arrow 18) (arrow 19).
  • the still stationary camera 5 and the associated with her evaluation of the controller in the form of the digital signal processor determines whether the suction nozzle 12 has ever detected a thread 2 and indeed only the foremost thread 2a. As soon as a single detected thread is detected by the camera, the backward movement is stopped due to a corresponding signal of the control device. If this can not be ascertained, the negative pressure is released, any threads that have been seized thereby are released, subsequently a negative pressure is built up again and the above-described thread detection process is repeated until the evaluation unit detects a correct thread detection.
  • the evaluation unit detects a correctly detected front thread 2a, then the compartment pin 9 pierces the enlarged one Gap between the foremost thread 2a and the following thread 2b.
  • the foremost thread 2a is thereby separated or separated from the thread layer 1 unambiguously and is available for further processing or handling. In this way, all the threads 2 of the layer 1 can be separated one after the other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP02717927A 2001-04-25 2002-04-25 Vorrichtung und verfahren zur separierung von fäden aus einer fadenschicht Expired - Lifetime EP1383949B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH754012001 2001-04-25
CH7542001 2001-04-25
PCT/CH2002/000230 WO2002088445A2 (de) 2001-04-25 2002-04-25 Vorrichtung und verfahren zur separierung von fäden aus einer fadenschicht

Publications (2)

Publication Number Publication Date
EP1383949A2 EP1383949A2 (de) 2004-01-28
EP1383949B1 true EP1383949B1 (de) 2006-07-26

Family

ID=4534126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02717927A Expired - Lifetime EP1383949B1 (de) 2001-04-25 2002-04-25 Vorrichtung und verfahren zur separierung von fäden aus einer fadenschicht

Country Status (7)

Country Link
EP (1) EP1383949B1 (ko)
KR (1) KR100905349B1 (ko)
CN (1) CN1279235C (ko)
AT (1) ATE334241T1 (ko)
DE (1) DE50207643D1 (ko)
PT (1) PT1383949E (ko)
WO (1) WO2002088445A2 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3330418A1 (en) 2016-12-01 2018-06-06 Stäubli Sargans AG Yarn separating module with a capacitive sensor device

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE520453C2 (sv) 2001-11-01 2003-07-15 Alfa Laval Corp Ab En apparat för samtidig rening av en vätska och en gas
EP1870501A1 (de) 2006-06-23 2007-12-26 Stäubli AG Pfäffikon Vorrichtung zum Separieren von Fäden aus einer Fadenschicht, Verfahren zum Betreiben der Vorrichtung und Verwendung der Vorrichtung
KR100943338B1 (ko) * 2007-07-13 2010-02-19 부경대학교 산학협력단 차량용 시트의 진동감쇄장치
JP4515533B1 (ja) * 2009-09-16 2010-08-04 株式会社藤堂製作所 自動綾取装置、及び自動綾取方法
DE202015008820U1 (de) * 2015-12-28 2017-03-29 Peter Beike Kettfädeneinfädelvorrichtung
CN108505199B (zh) * 2018-06-08 2020-04-14 李吉 喷气式纱线排出装置
CN109537152A (zh) * 2018-12-07 2019-03-29 福建伟易泰智能科技有限公司 一种纱线自动吸取装置及穿经机
CN109552936B (zh) * 2019-01-22 2020-08-11 福建伟易泰智能科技有限公司 一种防止粘连的装置、纱线分离装置及纱线分离的方法
CN110865084A (zh) * 2019-12-10 2020-03-06 闪电(昆山)智能科技有限公司 基于自学习模式的综丝分离检测系统及方法
CN111676577A (zh) * 2020-07-12 2020-09-18 诸暨市捷速尔纺织机械有限公司 穿棕机用双轴头纱线分纱推纱装置
CN112061879B (zh) * 2020-08-10 2022-03-29 深圳市海弘装备技术有限公司 分纱模组、穿经机及供纱方法
CN115074896B (zh) * 2021-08-17 2024-06-07 深圳市海弘装备技术有限公司 一种丝线限位装置及其方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH455674A (de) * 1965-12-07 1968-07-15 Teijin Ltd Verfahren und Vorrichtung zum Abtrennen von Fäden aus einer Fadenschicht
DE2847520C3 (de) * 1978-11-02 1981-08-06 Lindauer Dornier-Gesellschaft Mbh, 8990 Lindau Vorrichtung zum Vorlegen von Kettfäden für das automatische Einziehen derselben in Litzen und Lamellen einer Webmaschine
JPS60224842A (ja) * 1984-04-19 1985-11-09 帝人製機株式会社 糸通し方法およびその装置
DE59006019D1 (de) * 1989-10-03 1994-07-14 Rueti Ag Maschf Verfahren und Einrichtung zur Behebung von Kettfadenbrüchen in einer Webmaschine.
US5243742A (en) * 1991-10-25 1993-09-14 Teijin Seiki Co., Ltd. Warp supplying apparatus for a warp threading machine
AU4028599A (en) * 1998-06-29 2000-01-17 Staubli Ag Pfaffikon Device and method for separating threads from a layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3330418A1 (en) 2016-12-01 2018-06-06 Stäubli Sargans AG Yarn separating module with a capacitive sensor device

Also Published As

Publication number Publication date
KR20040002387A (ko) 2004-01-07
WO2002088445A2 (de) 2002-11-07
PT1383949E (pt) 2006-12-29
KR100905349B1 (ko) 2009-07-01
CN1279235C (zh) 2006-10-11
DE50207643D1 (de) 2006-09-07
ATE334241T1 (de) 2006-08-15
WO2002088445A3 (de) 2003-02-06
CN1464922A (zh) 2003-12-31
EP1383949A2 (de) 2004-01-28

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