EP0885991A1 - Verfahren zur Funktionsüberwachung eines Schussfadenwächters in Luftdüsenwebmaschinen - Google Patents
Verfahren zur Funktionsüberwachung eines Schussfadenwächters in Luftdüsenwebmaschinen Download PDFInfo
- Publication number
- EP0885991A1 EP0885991A1 EP98106022A EP98106022A EP0885991A1 EP 0885991 A1 EP0885991 A1 EP 0885991A1 EP 98106022 A EP98106022 A EP 98106022A EP 98106022 A EP98106022 A EP 98106022A EP 0885991 A1 EP0885991 A1 EP 0885991A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weft
- light barrier
- signal
- weaving machine
- sensor device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 13
- 238000012544 monitoring process Methods 0.000 title claims description 8
- 238000003780 insertion Methods 0.000 claims abstract description 13
- 230000037431 insertion Effects 0.000 claims abstract description 13
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 10
- 230000004888 barrier function Effects 0.000 claims description 55
- 238000009941 weaving Methods 0.000 claims description 22
- 238000011156 evaluation Methods 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 6
- 230000007257 malfunction Effects 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 description 6
- NIOPZPCMRQGZCE-WEVVVXLNSA-N 2,4-dinitro-6-(octan-2-yl)phenyl (E)-but-2-enoate Chemical compound CCCCCCC(C)C1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1OC(=O)\C=C\C NIOPZPCMRQGZCE-WEVVVXLNSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
Images
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
- D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
- D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
- D03D47/3066—Control or handling of the weft at or after arrival
- D03D47/3073—Detection means therefor
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/18—Automatic stop motions
- D03D51/34—Weft stop motions
Definitions
- the invention relates to a method for monitoring the function of an output of the Weft insertion channel of a reed arranged weft monitor with at least a first and a second light barrier, the first light barrier having the correct Entry of a weft thread in the weft insertion channel of a reed and the second light barrier has an incorrect weft insertion, e.g. one too long Detects weft or a so-called weft break and the hit Findings are transmitted by electrical signals from an evaluation device.
- CH-PS 655 745 A5 is a method for determining a weft insertion error by means of a weft detection device arranged on a weaving machine, hereinafter referred to as weft monitor, after which a predetermined angle of rotation range per revolution of the main loom shaft is determined and the presence of a weft is determined within this angle of rotation range.
- the shot guard monitors both a first rotation angle range in which a shot is to be detected and a second rotation angle range lying outside the first rotation angle range, a signal about the presence of a properly entered shot being generated only in the first rotation angle range while another , signal not generated by a weft thread, a so-called false signal, is also detected in the second angle range and a signal is generated there that triggers a weaving stop.
- the signal generated in the second angle of rotation range is only perceived as a false signal when it occurs, for example, continuously over a certain number of revolutions of the main loom shaft.
- a device for monitoring a weft thread by sensors is known from EP 0 004 836 A2.
- the subject of this previously known document is that a monitoring device known per se with a first and a second sensor is assigned a third sensor which detects the weft thread in the event of a defect in one of the two sensors.
- This solution is also not based on a functional check of the sensors.
- the first light barrier can be operated in web mode by interference signals, e.g. due to cable break can come about, generate false reports in such a way that a signal for one correct weft entry is present even though the weft entry was incorrect. Such an error message or such a false signal can also occur in one Rotation angle range of the weaving machine main shaft are generated, which is not that Angle range corresponds to in which the weft after its entry in the Shed has reached the first light barrier.
- the second light barrier is only in because of rarely occurring thread breaks Take action, so give a signal when there is a weft break. A defect of the second light barrier is therefore not detectable during each weft insertion.
- the object of the invention is therefore, by continuously monitoring the Functionality of the light barriers at the exit of the weft insertion channel a reed of an air jet loom arranged weft monitor Exclude malfunctions in the course of a weaving process and consequently manufacture avoid defective tissue.
- Monitoring the functionality of the first light barrier of the weft monitor is that in a range of rotation angle ⁇ 2 of the main loom shaft, the corresponds to the angle of rotation range ⁇ 1 in which the arrival of the one Weft insertion nozzle inserted into the shed through the first Light barrier of an evaluation device is signaled, occurring faults, e.g. the Breakage of a signal line leading to the light barrier, as at least one electrical one Interference signal from the evaluation device is signaled.
- the weaving machine drive stops the main shaft and an error message is generated, for example, on a display for the operating personnel. It is also essential to the invention that not every first interference signal resulting from the function monitoring in the rotation angle range ⁇ 2 or missing signal outside the rotation angle range ⁇ 1 must lead to a machine stop, but that more than one interference signal or missing signals can occur, and these signals by means of an algorithm for Determine the likelihood of a malfunction on the light barriers or, for example, in the course of the weaving process and only then the main drive is stopped.
- the functionality of the second light barrier is monitored by the fact that after the weft thread has been inserted into the weft insertion channel of the reed, the second light barrier is broken when the weft thread strikes the fabric edge, that is, it is broken even if there is no weft breakage. When the second light barrier is broken, it inevitably emits a signal to the evaluation device at each weft thread stop, which is used to monitor the functionality of the second light barrier. It has proven to be advantageous if the projection of a fabric table is used as a precaution, as is known from DE-PS 38 44 510.
- the rotation angle ranges ⁇ 1 and ⁇ 2, not shown here, of the total rotation angle of the Main loom shaft are related to one revolution of the main shaft.
- a weft thread 7 supplied by the thread store 15 is used transported by means of the entry nozzle 11 through the entry channel 5 of a reed 4 and its arrival at the light barrier 2 of the shot guard 1 detected and as an electrical Signal S1 transmitted to a signal evaluation device 8.
- the signal is recorded in an angle of rotation range ⁇ 1 of the main loom shaft. Outside of the angle of rotation range ⁇ 1, no signals are normally generated by the light barrier 2 because the weft thread 7 cannot arrive at the light barrier 2 in this region.
- the second light barrier 3 of the weft monitor 1 emits an electrical signal S2 to the evaluation device 8 when the weft thread 7 breaks through the light barrier 3 within the first rotation angle range ⁇ 1 of the main loom of the weaving machine. This is the case if, for example, there is a so-called shot break.
- the signal S2 triggers a stop of the drive 10 of the main shaft via the evaluation device 8 in the machine control 9.
- the second light barrier 3 will only come into action owing to the rarely occurring weft breaks, that is to say emit a signal if, for example, there is a weft break.
- a defect in the second light barrier 3, in contrast to the first light barrier 2, cannot be determined during each weft insertion.
- a defect in the second light barrier 3 can remain undetected over a longer period of time.
- the first light barrier 2 generates a signal S1, for example in the event of a shot break, but this signal S1 cannot be canceled by the signal S2 of the second light barrier 3.
- a defect in the light barrier 3 will result in a weft break being interpreted as a correctly inserted weft thread by the light barrier 2, that is to say a signal S1 is generated, although the signal S2 should have been generated.
- the second light barrier 3 is monitored for functionality according to the invention in that with each weft thread striking the binding point 13 of the fabric 14 through the reed 4, see also FIG. 2, the second light barrier 3 is broken through by a precaution outside the angle of rotation ⁇ 1 and thereby a signal S4 generated, which is different from the signal S2.
- the fabric table 12 of which has a projection 12 ' the with each weft thread stop between the light barriers 2, 3 in the entry channel 5 immersed projection 12 'in the light barrier 3 from the signal S4, which the Loom control 9 reports the functionality of the light barrier 3.
- the signals S3 and S4 are statistically in the Loom control 9 detected and by means of an algorithm, the probability the presence of a fault or a fault on the light barriers 2, 3 and a fault determined in the course of the weaving process by the weaving machine control 9.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Das im zweiten Drehwinkelbereich erzeugte Signal wird dabei erst dann als Fehlsignal wahrgenommen, wenn es z.B. kontinuierlich über eine bestimmte Anzahl von Umdrehungen der Webmaschinen-Hauptwelle auftritt.
Gegenstand dieser vorbekannten Druckschrift ist, daß einer an sich bekannten Überwachungseinrichtung mit einem ersten und einem zweiten Sensor ein dritter Sensor zugeordnet ist, der im Falle eines Defekts eines der zwei Sensoren den Schußfaden detektiert. Auf eine Funktionskontrolle der Sensoren stellt auch diese Lösung nicht ab.
Erfindungswesentlich ist ferner, daß nicht jedes erste aus der Funktionsüberwachung resultierende Störsignal in dem genannten Drehwinkelbereich α2 oder fehlende Signal außerhalb des Drehwinkelbereichs α1 zu einem Maschinenstop führen muß, sondern daß mehr als ein Störsignal oder fehlende Signale auftreten können, und diese Signale mittels eines Algorithmus zum Feststellen der Wahrscheinlichkeit einer Funktionsstörung an den Lichtschranken oder z.B. im Ablauf des Webprozesses verwendet werden und erst daraufhin der Hauptantrieb gestoppt wird.
Mit dem Durchbrechen der zweiten Lichtschranke gibt diese zwangsläufig bei jedem Schußfadenanschlag ein Signal an die Auswerteeinrichtung ab, das zur Überwachung der Funktionstüchtigkeit der zweiten Lichtschranke verwendet wird.
Als vorteilhaft hat sich erwiesen, wenn als Vorkehrungen der Vorsprung eines Gewebetisches verwendet wird, wie dieser aus der DE-PS 38 44 510 bekannt ist.
- Figur 1
- eine schematische Darstellung der erfindungswesentlichen Elemente der Webmaschine in der Draufsicht und
- Figur 2
- eine Schnittdarstellung gemäß der Linie I-I in Figur 1.
Außerhalb des Drehwinkelbereiches α1 werden von der Lichtschranke 2 im Normalfall keine Signale erzeugt, weil in diesem Bereich der Schußfaden 7 nicht an der Lichtschranke 2 ankommen kann.
Das ist dann der Fall, wenn z.B. ein sogenannter Schußbruch vorliegt.
Das Signal S2 löst über die Auswerteeinrichtung 8 in der Maschinensteuerung 9 einen Stop des Antriebes 10 der Hauptwelle aus.
Die zweite Lichtschranke 3 wird aber, wie bereits eingangs erwähnt, aufgrund von selten auftretenden Schußfadenbrüchen nur dann in Aktion treten, also ein Signal abgeben, wenn z.B. ein Schußbruch vorliegt.
Ein Defekt der zweiten Lichtschranke 3 ist also, im Gegensatz zur ersten Lichtschranke 2, nicht während eines jeden Schußeintrags feststellbar. Insofern kann ein Defekt an der zweiten Lichtschranke 3 über einen längeren Zeitraum unerkannt bleiben. Die Folge ist, daß z.B. bei einem Schußbruch die erste Lichtschranke 2 ein Signal S1 erzeugt, dieses Signal S1 jedoch nicht durch das Signal S2 der zweiten Lichtschranke 3 aufgehoben werden kann. Insofern wird ein Defekt an der Lichtschranke 3 dazu führen, daß ein Schußbruch als ein korrekt eingetragener Schußfaden durch die Lichtschranke 2 interpretiert wird, also ein Signal S1 erzeugt wird, obwohl das Signal S2 hätte erzeugt werden müssen. Dadurch bleiben Schußfehler im Gewebe zunächst unerkannt.
Hier setzt die Erfindung an.
Die zweite Lichtschranke 3 wird erfindungsgemäß dadurch auf Funktionstüchtigkeit überwacht, daß mit jedem Schußfadenanschlagen an den Bindepunkt 13 des Gewebes 14 durch das Webblatt 4, siehe auch Figur 2, die zweite Lichtschranke 3 durch eine Vorkehrung außerhalb des Drehwinkels α1 durchbrochen wird und dadurch ein Signal S4 erzeugt, das unterschiedlich zu dem Signal S2 ist.
- 01
- Schußfadenwächter
- 02
- Lichtschranke
- 03
- Lichtschranke
- 04
- Webblatt
- 05
- Eintragskanal
- 06
- Luftdüsenwebmaschine
- 07
- Schußfaden
- 08
- Auswerteeinrichtung
- 09
- Webmaschinensteuerung
- 10
- Antrieb
- 11
- Eintragsdüse
- 12
- Gewebetisch
- 12'
- Vorsprung
- 13
- Bindepunkt
- 14
- Gewebe
- 15
- Fadenspeicher
- 16
- Spule
- 17
- Kettfaden
- 18
- Schwingbewegung
- S0
- elektr. Signal
- S1
- elektr. Signal
- S2
- elektr. Signal
- S3
- elektr. Signal
- S4
- elektr. Signal
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19716587 | 1997-04-21 | ||
DE19716587A DE19716587C1 (de) | 1997-04-21 | 1997-04-21 | Verfahren zur Funktionsüberwachung eines Schußfadenwächters in Luftdüsenwebmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0885991A1 true EP0885991A1 (de) | 1998-12-23 |
EP0885991B1 EP0885991B1 (de) | 2000-11-29 |
Family
ID=7827140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98106022A Expired - Lifetime EP0885991B1 (de) | 1997-04-21 | 1998-04-02 | Verfahren zur Funktionsüberwachung eines Schussfadenwächters in Luftdüsenwebmaschinen |
Country Status (7)
Country | Link |
---|---|
US (1) | US6014991A (de) |
EP (1) | EP0885991B1 (de) |
JP (1) | JP3263026B2 (de) |
AT (1) | ATE197824T1 (de) |
DE (2) | DE19716587C1 (de) |
ES (1) | ES2154066T3 (de) |
PT (1) | PT885991E (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102534953A (zh) * | 2010-11-29 | 2012-07-04 | 津田驹工业株式会社 | 空气喷射式织机的副喷嘴的喷射期间设定方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010044127B3 (de) * | 2010-11-18 | 2011-12-29 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | Greiferkopf zum Eintrag von Schussfäden an einer Greiferwebmaschine sowie eine Greiferwebmaschine mit einem derartigen Greiferkopf |
JP6372229B2 (ja) | 2014-08-04 | 2018-08-15 | 株式会社豊田自動織機 | ジェットルームにおける緯糸検出装置 |
JP7424234B2 (ja) * | 2020-07-08 | 2024-01-30 | 株式会社豊田自動織機 | エアジェット織機 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3608590A (en) * | 1968-10-10 | 1971-09-28 | Sulzer Ag | Optical weft stop motion for a weaving machine |
US4041985A (en) * | 1975-05-07 | 1977-08-16 | Nissan Motor Company, Limited | Weft sensor system of sensing malfunction of a weaving loom |
EP0004836A2 (de) * | 1978-04-04 | 1979-10-17 | Tsudakoma Kogyo Kabushiki Kaisha | Schussfadenwächter für Düsenwebmaschinen |
CH655745A5 (de) * | 1979-11-07 | 1986-05-15 | Toyoda Automatic Loom Works | Verfahren zum feststellen eines schusseintragsfehlers. |
EP0285872A2 (de) * | 1987-03-16 | 1988-10-12 | Tsudakoma Corporation | Verfahren zum Kontrollieren und Auswechseln eines Wickelkörpers |
JPH0533246A (ja) * | 1991-07-30 | 1993-02-09 | Tsudakoma Corp | 織機の緯糸検知装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE3273230D1 (en) * | 1982-11-08 | 1986-10-16 | Sulzer Ag | Weaving machine |
DE3844510A1 (de) * | 1988-04-07 | 1989-12-28 | Dornier Gmbh Lindauer | Luftwebmaschine |
DE3821725A1 (de) * | 1988-04-07 | 1989-10-26 | Dornier Gmbh Lindauer | Luftwebmaschine |
DE19602513C1 (de) * | 1996-01-25 | 1996-10-02 | Dornier Gmbh Lindauer | Verfahren zum Überwachen der Funktionstüchtigkeit elektrisch ansteuerbarer Magnetventile in Webmaschinen |
DE19611320C2 (de) * | 1996-03-22 | 1999-05-20 | Dornier Gmbh Lindauer | Verfahren und Vorrichtung zum pneumatischen Unterstützen des Eintragens und Spannens eines Schußfadens in Webmaschinen |
-
1997
- 1997-04-21 DE DE19716587A patent/DE19716587C1/de not_active Expired - Fee Related
-
1998
- 1998-04-02 ES ES98106022T patent/ES2154066T3/es not_active Expired - Lifetime
- 1998-04-02 DE DE59800353T patent/DE59800353D1/de not_active Expired - Fee Related
- 1998-04-02 EP EP98106022A patent/EP0885991B1/de not_active Expired - Lifetime
- 1998-04-02 AT AT98106022T patent/ATE197824T1/de not_active IP Right Cessation
- 1998-04-02 PT PT98106022T patent/PT885991E/pt unknown
- 1998-04-08 JP JP09576098A patent/JP3263026B2/ja not_active Expired - Fee Related
- 1998-04-21 US US09/064,043 patent/US6014991A/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3608590A (en) * | 1968-10-10 | 1971-09-28 | Sulzer Ag | Optical weft stop motion for a weaving machine |
US4041985A (en) * | 1975-05-07 | 1977-08-16 | Nissan Motor Company, Limited | Weft sensor system of sensing malfunction of a weaving loom |
EP0004836A2 (de) * | 1978-04-04 | 1979-10-17 | Tsudakoma Kogyo Kabushiki Kaisha | Schussfadenwächter für Düsenwebmaschinen |
CH655745A5 (de) * | 1979-11-07 | 1986-05-15 | Toyoda Automatic Loom Works | Verfahren zum feststellen eines schusseintragsfehlers. |
EP0285872A2 (de) * | 1987-03-16 | 1988-10-12 | Tsudakoma Corporation | Verfahren zum Kontrollieren und Auswechseln eines Wickelkörpers |
JPH0533246A (ja) * | 1991-07-30 | 1993-02-09 | Tsudakoma Corp | 織機の緯糸検知装置 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 017, no. 333 (C - 1074) 24 June 1993 (1993-06-24) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102534953A (zh) * | 2010-11-29 | 2012-07-04 | 津田驹工业株式会社 | 空气喷射式织机的副喷嘴的喷射期间设定方法 |
CN102534953B (zh) * | 2010-11-29 | 2014-09-17 | 津田驹工业株式会社 | 空气喷射式织机的副喷嘴的喷射期间设定方法 |
Also Published As
Publication number | Publication date |
---|---|
DE19716587C1 (de) | 1998-09-03 |
US6014991A (en) | 2000-01-18 |
PT885991E (pt) | 2001-04-30 |
EP0885991B1 (de) | 2000-11-29 |
ES2154066T3 (es) | 2001-03-16 |
JP3263026B2 (ja) | 2002-03-04 |
JPH10317261A (ja) | 1998-12-02 |
DE59800353D1 (de) | 2001-01-04 |
ATE197824T1 (de) | 2000-12-15 |
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