EP0962566A2 - Procédé pour contrÔler l'opération de libération et d'arrêt du fil de trame sur les dispositifs de stockage de fil dans les métiers à tisser - Google Patents

Procédé pour contrÔler l'opération de libération et d'arrêt du fil de trame sur les dispositifs de stockage de fil dans les métiers à tisser Download PDF

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Publication number
EP0962566A2
EP0962566A2 EP99109509A EP99109509A EP0962566A2 EP 0962566 A2 EP0962566 A2 EP 0962566A2 EP 99109509 A EP99109509 A EP 99109509A EP 99109509 A EP99109509 A EP 99109509A EP 0962566 A2 EP0962566 A2 EP 0962566A2
Authority
EP
European Patent Office
Prior art keywords
stopper
time
weft
characteristic
characteristic feature
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
Application number
EP99109509A
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German (de)
English (en)
Other versions
EP0962566A3 (fr
EP0962566B1 (fr
Inventor
Adnan Dr. Wahhoud
Dieter Teufel
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP0962566A2 publication Critical patent/EP0962566A2/fr
Publication of EP0962566A3 publication Critical patent/EP0962566A3/fr
Application granted granted Critical
Publication of EP0962566B1 publication Critical patent/EP0962566B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/362—Drum-type weft feeding devices with yarn retaining devices, e.g. stopping pins
    • D03D47/363—Construction or control of the yarn retaining devices

Definitions

  • the invention relates to a method for monitoring the weft release and Stopping process on pre-winding devices, in particular with air jet looms in Active connection.
  • the main nozzle of the air jet loom and the prewinder are electrically controlled such that the thread stopper of the prewinder releases the weft length in synchronism with the electrical control of the electromagnetic control valve of the main nozzle and the thread stopper blocks the weft release at the end of the weft insertion process.
  • This necessary or defined weft thread length is achieved in that the drum of the prewinder is adjustable in diameter and thus picks up and releases an integer number of turns which corresponds to the weft thread insertion length.
  • prewinder devices have at least one thread stopper which can be moved radially to the drum diameter and thereby releases or stops the weft thread.
  • the at least one stop device is actuated electromagnetically directly or also indirectly in connection with the switching of an electromagnetically actuated valve of the main nozzle.
  • the synchronous operation of the electromagnetic stopper device of the prewinder and the solenoid valve of the main nozzle of an air jet weaving machine requires, as is apparent from EP 0 544 730 B1, that both the times for releasing and stopping the weft thread and the operating times of the main nozzle are in agreement or are the same move within reasonable limits.
  • the state of the art does not monitor whether the necessary conditions for synchronous operation continue to exist during web operation.
  • the weft between the pre-winder and the main nozzle is subjected to a relatively high thread tension.
  • this thread tensile force can lead to a so-called weft thread breakage directly during the aforementioned relatively short period of time or as the weft thread insertion process continues.
  • the times at which the stopper has to release and stop the weft thread and the functional time of the main blowing nozzle i.e. the time at which the weft thread is inserted, the cause of a weft break can be recognized directly not possible. Stopping the weft thread at a point in time that is later than the stopping point specified by the control system also leads to production disruptions, because a further whole-number thread winding is emitted from the drum of the prewinder, which is not initially required for the weft thread insertion.
  • the production disruption here can be the formation of weft loops, which can also be the cause of weft breaks.
  • DE 196 02 513 C1 discloses a method for monitoring the functionality of electrically controllable solenoid valves in weaving machines.
  • the background of the invention is that a possible failure of the pneumatically operated and electrically controllable auxiliary units used in weaving machines can be recognized at an early stage.
  • all electromagnetic systems including electrically controlled solenoid valves, have a characteristic curve of the control current (I) over time (t).
  • the special characteristic of the control current (I) over time (t) is shown in the rising part of a curve as a brief current drop. This current drop occurs regularly when the magnetic circuit in an electromagnetic system is closed.
  • the object is achieved by using the known process steps. solved the invention according to DE 196 02 513 C1. Thereafter, the characteristic current profile of a device consisting of a coil, a spring-loaded stopper and a first and second position signal transmitter for the stopper is now also detected when the electromagnetic stopper device of a pre-winding device is electrically actuated. It is essential to the invention that the brief drop in the control current, which occurs regularly when the magnetic circuit in an electromagnetically operated system is closed, is measured over time in the ascending part of a curve and is shown in a diagram.
  • this transient current slump at the time of actuation is with a t ⁇ t 1 defined as a target value and with a determined actual value ⁇ t 1 'compared.
  • the determined actual value .DELTA.t 1 ' lies outside the predetermined point in time .DELTA.t 1 (setpoint) or a predetermined time window (soli value range)
  • an error message is generated in the control of the weaving machine, which leads to the interruption of the weaving process. If the same deviation from the specified setpoint or setpoint range occurs several times in succession, the actuation time of the stopper device can be moved according to the invention in the sense of an advance or delay.
  • the weft thread is released electromagnetically by the stopper device spring-loaded stopper, so in an embodiment of the invention to control the Stop function generates a path or position signal.
  • a path or position signal for this come e.g. as a means Photoelectric sensors, initiators, Hall sensors and the like in question.
  • the characteristic feature of the brief drop in the control current (I) occurs both when the thread stopper releases and when the weft thread is stopped.
  • the first or second characteristic feature can optionally be used for monitoring the switching time of the stopper device.
  • the control current I is plotted on the ordinate and the time t of the effective control current of a stop device connected to a direct current source VDC or a thread braking device of a spooling device 1 according to FIG. 3, not shown, is plotted on the abscissa.
  • the current profile in an electromagnetic system, such as the stopper or thread braking device is known. Accordingly, it is also known, the current characteristic curve 1 that in the ascending part 1a, a brief current slump after driving the stopper or a t yarn braking device yields at a time .DELTA.t 1 2 as a characteristic feature of such a curve. 1
  • This characteristic feature 2 occurs when the magnetic circuit of the stopper device consisting of at least the coil 7 and the stopper 4 or the magnetic circuit of the thread brake device, not shown, closes.
  • the occurrence of the characteristic feature 2 'at a time ⁇ t 1' , its deviation in time and size compared to a characteristic feature 2 at a time ⁇ t 1 or the absence of characteristic feature 2 is an indicator of the functionality of the above-mentioned devices of a prewinding device or an indicator of harmful asynchrony in the interaction between the weft insertion system of the weaving machine and the prewinding device 3rd
  • the characteristic feature 2 at ⁇ t 1 of curve 1 according to FIG. 1 is monitored, for example, by a peak value detection.
  • the detection signal is forwarded to a measuring circuit 10 known per se, see also FIG. 2.
  • the characteristic feature 2 at ⁇ t 1 is represented when each stopper device or each thread brake is activated (switched on) by means of a weaving machine control not specified here.
  • the relevant control device of the weaving machine receives a signal which either indicates the absence of the characteristic feature 2 in the control stream 1 of the stopper device or the thread braking device and / or triggers an interruption of the weaving process.
  • a measured actual value ⁇ t 1 ' for the occurrence of the characteristic feature 2' is shown as an example on the abscissa according to FIG.
  • This actual time period ⁇ t 1 ' and / or the actual control current curve 1' is recorded as a measured value.
  • These measured values are compared with the reference values in the comparator 13 according to FIG. 2.
  • the time t becomes a , which corresponds to the activation time of the stopper device 4, 7 according to FIG. 3 or the thread braking device, not shown, is corrected.
  • ⁇ t 1 and ⁇ t 1 ' does not exceed or fall below a predetermined tolerance range. If, for example, the tolerance range is determined to be exceeded in the course of the operating time of the prewinding device 1, this is indicated by a signal relating to this, which can be associated with the interruption of the weaving process.
  • the prewinder 3 shown schematically in Figure 3 has a drum 3a, on which a weft thread 5 drawn off from a thread bobbin, not shown, is wound up.
  • the weft 5 is not overhead in the weaving process from the drum 3a the weft insertion element shown is drawn off via a thread guide 8.
  • the weft insertion member is the main nozzle.
  • the weft insertion element is controlled in such a way that the stopper device, consisting of the bobbin 7, the thread stopper 4 loaded with a spring 4a and the at least one detection device 6, or for example a thread braking device arranged in the take-off direction of the weft thread, see arrow direction 9, synchronously weft thread 5 released with the control of the main nozzle and blocked at the end of the weft insertion on the drum 2 and, if necessary, a thread braking device brakes the weft.
  • the stopper device and the thread brake device are connected to the means 10, 11, 12, 13 and 14, which are known per se in FIG.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP99109509A 1998-06-02 1999-05-12 Procédé pour contrôler l'opération de libération et d'arrêt du fil de trame sur les dispositifs de stockage de fil dans les métiers à tisser Expired - Lifetime EP0962566B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19824613 1998-06-02
DE19824613A DE19824613A1 (de) 1998-06-02 1998-06-02 Verfahren zum Überwachen des Schußfadenfreigabe- und Stoppvorganges an Vorspulgeräten für Webmaschinen

Publications (3)

Publication Number Publication Date
EP0962566A2 true EP0962566A2 (fr) 1999-12-08
EP0962566A3 EP0962566A3 (fr) 2001-05-23
EP0962566B1 EP0962566B1 (fr) 2003-10-29

Family

ID=7869666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99109509A Expired - Lifetime EP0962566B1 (fr) 1998-06-02 1999-05-12 Procédé pour contrôler l'opération de libération et d'arrêt du fil de trame sur les dispositifs de stockage de fil dans les métiers à tisser

Country Status (4)

Country Link
US (1) US6176272B1 (fr)
EP (1) EP0962566B1 (fr)
JP (1) JPH11350301A (fr)
DE (2) DE19824613A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0100509L (sv) * 2001-02-16 2002-02-05 Texo Ab Förfarande och anordning för att längdmäta och magasinera tråd vid väv- eller textilmaskiner
DE10151780C1 (de) * 2001-10-19 2003-05-22 Dornier Gmbh Lindauer Verfahren und Vorrichtung zur Beeinflussung der Fadenbremskraft einer zwischen einem Garnvorratssystem und einem Fadenspeicher einer Webmaschine angeordneten Schussfadenbremse
US7614948B2 (en) * 2003-09-15 2009-11-10 Igt Multi-player bingo with slept awards reverting to progressive jackpot pool
US7398431B2 (en) * 2004-12-20 2008-07-08 Emc Corporation System and method of dynamically setting a fault threshold for an operational module
JP7260387B2 (ja) * 2019-05-06 2023-04-18 津田駒工業株式会社 水噴射式織機における緯入れ方法及び装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673004A (en) * 1984-05-16 1987-06-16 N.V. Weefautomaten Picanol Adjustable control of the weft on a weaving loom
DE4026434A1 (de) * 1990-08-21 1992-02-27 Iro Ab Verfahren zum steuern einer schussfadenliefer- und -messvorrichtung sowie schussfadenliefer- und -messvorrichtung
EP0494050A1 (fr) * 1990-12-29 1992-07-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif pour le contrôle de pression d'air d'insertion dans un métier à tisser à jet
EP0522846A1 (fr) * 1991-07-09 1993-01-13 Tsudakoma Kogyo Kabushiki Kaisha Procédé et dispositif/de contrôle de l'insertion de trame dans un métier à jet
US5548210A (en) * 1993-05-21 1996-08-20 Dittrich; Ehrenfried System and procedure for the check-up solenoid valves
US5787937A (en) * 1996-01-25 1998-08-04 Lindauer Dornier Gesellschaft Mbh Method for monitoring the proper functioning of electromagnetic air valves in pneumatic looms

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS179657B1 (en) 1975-06-10 1977-11-30 Juraj Spisiak Wiring of apparatus for controlling active elements of weft inserting duct in jet weaving machines
JPS58208446A (ja) 1982-05-31 1983-12-05 津田駒工業株式会社 ジエツトル−ム用よこ糸検知方法
US4516076A (en) * 1982-09-17 1985-05-07 The Singer Company Fault detection arrangement for relay switching system
DE3818766A1 (de) 1988-06-02 1989-12-07 Dornier Gmbh Lindauer Duesensteuerung fuer einen luftwebstuhl
DE3843683A1 (de) 1988-12-23 1990-06-28 Dornier Gmbh Lindauer Schussfadenwaechter fuer luftwebmaschinen
US4932246A (en) * 1989-02-22 1990-06-12 Motorola, Inc. Diagnostic fault test system and circuit
EP0415875B1 (fr) * 1989-09-01 1994-05-18 Sulzer RàœTi Ag Procédé pour ajuster l'extension de fil de trame dans la foule et la consommation d'air des tuyères auxiliaires d'un métier à air
JP2745848B2 (ja) 1991-03-25 1998-04-28 住友金属工業株式会社 疲労特性に優れた自動車用高強度電縫鋼管
JP2970074B2 (ja) 1991-05-29 1999-11-02 株式会社豊田自動織機製作所 ジェット織機における圧力制御方法
JPH05230739A (ja) 1992-01-27 1993-09-07 Toyota Autom Loom Works Ltd ジェットルームにおけるサブノズルの噴射圧制御装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673004A (en) * 1984-05-16 1987-06-16 N.V. Weefautomaten Picanol Adjustable control of the weft on a weaving loom
DE4026434A1 (de) * 1990-08-21 1992-02-27 Iro Ab Verfahren zum steuern einer schussfadenliefer- und -messvorrichtung sowie schussfadenliefer- und -messvorrichtung
EP0494050A1 (fr) * 1990-12-29 1992-07-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif pour le contrôle de pression d'air d'insertion dans un métier à tisser à jet
EP0522846A1 (fr) * 1991-07-09 1993-01-13 Tsudakoma Kogyo Kabushiki Kaisha Procédé et dispositif/de contrôle de l'insertion de trame dans un métier à jet
US5548210A (en) * 1993-05-21 1996-08-20 Dittrich; Ehrenfried System and procedure for the check-up solenoid valves
US5787937A (en) * 1996-01-25 1998-08-04 Lindauer Dornier Gesellschaft Mbh Method for monitoring the proper functioning of electromagnetic air valves in pneumatic looms

Also Published As

Publication number Publication date
JPH11350301A (ja) 1999-12-21
EP0962566A3 (fr) 2001-05-23
DE19824613A1 (de) 1999-12-09
EP0962566B1 (fr) 2003-10-29
US6176272B1 (en) 2001-01-23
DE59907506D1 (de) 2003-12-04

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