EP0458753B1 - Einschusskontrollvorrichtung für Luftwebmaschinen - Google Patents

Einschusskontrollvorrichtung für Luftwebmaschinen Download PDF

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Publication number
EP0458753B1
EP0458753B1 EP19910810395 EP91810395A EP0458753B1 EP 0458753 B1 EP0458753 B1 EP 0458753B1 EP 19910810395 EP19910810395 EP 19910810395 EP 91810395 A EP91810395 A EP 91810395A EP 0458753 B1 EP0458753 B1 EP 0458753B1
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EP
European Patent Office
Prior art keywords
weft picking
data
weft
picking control
control factor
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
EP19910810395
Other languages
English (en)
French (fr)
Other versions
EP0458753A1 (de
Inventor
Masahiko c/o KABUSHIKI KAISHA TOYODA Kato
Akio c/o KABUSHIKI KAISHA TOYODA Arakawa
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.)
Toyota Industries Corp
Original Assignee
Toyoda Jidoshokki Seisakusho KK
Toyoda Automatic Loom Works Ltd
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 Toyoda Jidoshokki Seisakusho KK, Toyoda Automatic Loom Works Ltd filed Critical Toyoda Jidoshokki Seisakusho KK
Publication of EP0458753A1 publication Critical patent/EP0458753A1/de
Application granted granted Critical
Publication of EP0458753B1 publication Critical patent/EP0458753B1/de
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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
    • D03D47/28—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
    • D03D47/3026—Air supply systems
    • D03D47/3053—Arrangements or lay out of air supply systems
    • 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
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • 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
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D03D47/304—Controlling of the air supply to the auxiliary nozzles

Definitions

  • the present invention relates to a weft picking control device in a jet loom of the type wherein a weft yarn is picked or inserted into a shed by the action of a fluid jet injected by a weft picking nozzle.
  • control factors which influence the weft picking condition include for example the time at which weft picking operation is started and period of time during which weft transport fluid is injected from weft picking nozzle.
  • the time of weft picking commencement is governed by the fabric width (or reed width) and the period, i.e. the duration of the injection is dependent on the thickness (or number count) and character of weft yarn to be picked.
  • EP-A1-0.290.975 describes an automatic picking controlling method in which a plurality of jetting patterns for running modes of picked weft yarns is stored in a memory. The running condition of the inserted weft is detected during the actual picking operation and then a jetting pattern suitable for the running condition of the picked weft yarn is read from the memory. Thereafter the subnozzle groups are controlled, i.e. operated and actuated on the basis of the jetting pattern for a predetermined period of time after reading the jetting pattern.
  • the Japanese patent application No. 62-263348 (1987) discloses a device in which a control factor, namely the period of injection, is selected on the basis of input data on fabric condition, namely the number count of weft yarn and thereby to optimize the control setting, without relying on the experience of skilled workmen.
  • a control device is operated as follows:
  • the weft number counts, as the fabric condition data, are classified into a plurality of groups, e.g. very small, small, slightly small, average, slightly large, large and very large, according to the rule of order, while the periods of injection, as the control factor, are classified similarly into a plurality of groups, e.g. very short, short, slightly short, average, slightly long, long and very long. Allotment of injection periods or varying lengths to the respective groups is made and based on the experience and knowledge of experts and workmen regarding the optimum corresponding relationship between the fabric condition data and their associated control factors.
  • the groups of fabric condition data and the groups of control factors are correlated with each other, and the means for establishing the control factor operates to select an optimum control factor for the input data on the basis of the correlation between the fabric condition data and the control factors. This correlation, or the corresponding relationship, is established previously on the basis of the experience and knowledge of experts and workmen.
  • a length of weft yarn Y thus measured and stored by the device 1 is released therefrom for picking by a main weft picking nozzle 2.
  • Weft insertion is then assisted by a plurality of aixiliary nozzles 3, 4, 5, 6, 7, 8, 9 and 10.
  • a weft yarn Y has been picked successfully, the yarn is detected by a weft detector 11, which is preferably a photoelectric sensor or reflection type, and the loom operation is continued accordingly. If a weft yarn Y fails to be detected by the weft detector 11, the loom operation is cause to stop.
  • Releasing and stopping of a weft yarn from winding surface 1a of the weft measuring/storing device 1 is accomplished by a movable stop in 12a whose movement is controlled by an electromagnetic solenoid 12 which is in turn controlled by an electromagnetic solenoid 12 which is in turn controlled to be energized and deenergized by appropriate command signals from a control computer C.
  • the control computer C operates to cause the solenoid 12 to be energized via a drive circuit 14 in response to a detection signal from a rotary encoder 13 which detection signal indicates an angle of rotation of the loom.
  • a weft release detector 15 Adjacent to the yarn winding surface 1a is disposed a weft release detector 15, preferably a photoelectric sensor of reflection type, which is adapted to detect a weft yarn Y which is being drawn and released from the yarn winding surface 1a.
  • the control computer C emits a command signal to deenergize the solenoid 12 so that the stop pin 12a is moved into engagement with the yarn winding surface 1a to stop the drawing and releasing of the weft yarn Y.
  • Injection of air under pressure from the main nozzle 2 is controlled by an electromagnetically-operated valve V 0 .
  • injection of air under pressure from the auxiliary nozzles 3 - 10 is controlled by electro-magneticallly-operated valves V 1 , V 2 , V 3 , V 4 , V 5 , V 6 V 7 , V 8 , respectively.
  • the valve V 0 is connected to an air supply tank 16 and the valves V 1 - V 8 to an air supply tank 17.
  • the control computer C includes a central processing unit CPU, data memory C 1 and program memory C 2 .
  • the control computer C further includes a data input device 19 connected thereot for inputting data on fabric conditions.
  • the program memory C 2 of the control computer C stores therein a program, as shown by the flow chart in Fig. 5, for establishing control factor.
  • the control factor in this embodiment is the period of time of air injection by each of the auxiliary nozzles 3 - 10.
  • the length of actual injection period by the nozzle which can be expressed by ⁇ i - ⁇ i , is established the same for all the auxiliary nozzles.
  • the main nozzle 2 commences air injection a the angle ⁇ 0 and stops the injection at the angle ⁇ 0 .
  • Each of the auxiliary nozzles 3 to 10 commences air injection at the angle ⁇ i and stops the injection at the angle ⁇ i .
  • the curved line D indicates an optimum condition of weft flying and the angle of rotation T w depicts the time at which the leading end of a weft yarn Y should reach the target position.
  • the period of air injection ( ⁇ i , ⁇ i ) corresponds to the period of time x during which each of the electromagnetic valves V i is kept open, and this open period of the valves is established by the control factor establishin program shown by the flow chart of Fig. 5.
  • functions g 1 , g 2 , g 3 , g 4 , g 5 , g 6 , g 7 are established so as to correspond respectively to fabric condition data groups G 1 , G 2 , G 3 , G 4 , G 5 , G 6 m G 7 which are thus classified according to the rule of order in yarn number counts (1 - n 6 ).
  • the likelihood of yarn number count 1 of the fabric condition data group G 1 is "1", while that of yarn number count n 1 of the same group G 1 is "0".
  • the likelihood of yarn number count 1 of the condition data group G 2 is "0", that of yarn number count n 1 is “1”, and that of yarn number count n 2 is "0", respectively.
  • control factor groups F 1 , F 2 , F 3 , F 4 , F 5 , F 6 , F 7 which are thus classified according to the rule of order in the open period of the electromagnetic valves v i .
  • the likelihood of valve open period ⁇ 1 of the control factor group F 1 is "1", while that of valve open period ⁇ 2 of the same control factor group is "0".
  • the likelihood of valve open period ⁇ 1 of the control factor group F 2 is "0", that of valve open period ⁇ 2 is “1”, and that of valve open period ⁇ 3 is "0", respectively.
  • the condition data group G j corresponds to the control factor group F 8-j , which means that the valves V i should be kept opened for a longer period of time for fliying a weft yarn with a count of smaller number, and the classification of the control factor groups F j , or the grouping of valve open periods ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 , ⁇ 5 , ⁇ 6 , ⁇ 7 , is provided in light of experience and knowledge of experts and skilled workmen.
  • the point ⁇ x on the abscissa corresponding to the point of grafity center Q( ⁇ x ) represents the component of open period for the electro-magnetic valves V i which is suitable for picking a weft yarn Y having the number count x.
  • a curved line E 1 in the diagram (a) of Fig. 3.
  • this curved line E 1 is influenced by the manner in which the valve open periods ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 , ⁇ 5 , ⁇ 6 , ⁇ 7 are grouped for classification from the experience and knowledge of experts and skilled workmen. Since such experience and knowledge used as the basis for the grouping of the above valve open periods ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 , ⁇ 5 , ⁇ 6 , ⁇ 7 are very accurate, the curve line E 1 can provide an optimum valve open period for each yarn number count.
  • the rotary encoder 13 for detecting the angle of rotation of the loom is operated in increment of ⁇ ⁇ (e.g. 2.5°). For this reason, the curve E 1 in the diagram (a) of Fig. 3 is converted into discrete function E 1 ′, as shown in the diagram (b) of Fig. 3.
  • a dot represents a point at which a parameter of yarn number count is present; and a circle represents a point at which such parameter is absent.
  • ⁇ x (( ⁇ x / ⁇ ⁇ ) + 1) ⁇ ⁇
  • ( ⁇ x / ⁇ ⁇ ) represents an integral value with the decimal of ⁇ x / ⁇ ⁇ removed.
  • this ⁇ x is stored as the valve open period ⁇ x .
  • the control computer C will control the operation of the valves V i during weaving operation according to the stored valve open period ⁇ x .
  • the present invention is not limited to the above-described embodiment, but it can be practiced in other way, e.g., wherein the time of weft picking commencement is set for each of different reed width dimensions, as will be described in the following with reference to Figs. 6 through 10.
  • the fabric condition data groups H j and the control factor groups K j are established on the basis of experience and knowledge of expert and skilled workmen so as to correlate to each other.
  • the grouping of the control factor groups K j , or the establishment of the individual weft picking commencement times t 1 , t 2 , t 3 , t 4 , t 5 , t 6 , t 7 , are made in ligth of the above experience and knowledge.
  • control computer C Upon input of fabric condition dta, or data y on the reed width, through the data input device 19, the control computer C performs a series of calculations in a procedure similar to that described with reference to the first embodiment, but according to the flow chart provided in Fig.
  • the curved line E 2 can provide an optimum weft picking commencement time for each reed width.
  • the curved line E 2 in the diagram (a) of Fig. 8 is converted into discrete function E 2 ′, as indicated in the diagram (b) of Fig. 8, for the same reason as in the first embodiment.
  • the fabric condition data and the control factors may be grouped in either a rougher or finder way than the abvove-described embodiments.
  • the fabric condition group may include other fabric conditions such as kinds of weft yarn
  • the control factors may include other factors such as injection pressure of weft picking nozzle and/or running speed of the loom i.e. rpm of the loom.
  • the weft picking control device of the jet loom has a data input device 19 for feeding data of fabric conditions like yarn count number and/or reed width.
  • a data memory C 1 with stored control factor data regarding weft picking conditions like weft picking commencement, fluid injection time, duration and/or end.
  • the data are classified in a plurality of groups according to a rule of order.
  • control factor data are selected for automatically setting of the loom by a CPU and program C 2 that is based on the interdependence of fabric conditions and control factor data.

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

Claims (7)

  1. Regelvorrichtung (C; C1, C2, CPU, 13, 14, 18, 19) für den Schusseintrag bei einer Luftdüsenwebmaschine, bei welcher ein Schussfaden (Y) mit Hilfe von Luft-Schusseintragsdüsen (2, 2 - 10) eingetragen wird, wobei die Regeleinrichtung (C; C1, C2, CPU, 13, 14, 18, 19) umfasst:
    eine Einrichtung (C1) zum Speichern von Schusseintrags-Regeldaten von wenigstens einer Schussfaden-Eintragsbedingung, und
    eine Einrichtung (19) für das Eingeben von wenigstens einer Gewebebedingung, welche diese Schussfaden-Eintragsbedingung beeinflusst und
    welche gekennzeichnet, ist durch
    eine Einrichtung (C1) zum vorherigen Einstellen und zum Speichern einer Vielzahl von mehr als zwei Gruppen von aufeinanderfolgend gruppierten Gewebebedingungen, welche sich aus der geordneten Klassifizierung von Daten von wenigstens einer Gewebebedingung und einer Mehrzahl von mehr als zwei Gruppen von aufeinanderfolgend geordneten Schusseintrags-Regeldaten, welche sich aus der geordneten Klassifizierung von Daten wenigstens einer Schusseintrags-Regelgrösse ergeben,
    eine Einrichtung (C1, C2, CPU) zum Bestimmen einer bestimmten Gruppe von Gewebebedingungs-Daten aus der Vielzahl von mehr als zwei Gruppen von aufeinanderfolgend gruppierten Gewebebedingungs-Daten, die durch die Eingabe-Einrichtung (19) eingegeben wurden, welche eine bestimmte Gruppe von Schusseintragsfaktor-Daten aus der Vielzahl von mehr als zwei Gruppen von aufeinanderfolgend gruppierten Daten, auf der Basis der Wahrscheinlichkeit für die spezifischen Gruppen von Gewebebedingungs-Daten bestimmten, und welche einen optimalen Schusseintragsfaktor für die Daten von wenigstens einer Gewebebedingung, welche mit der Daten-Eingabe-Einrichtung (19) auf der Basis der bestimmten, spezifischen Gruppe von Schusseintragsfaktor-Daten eingegeben wurden, bestimmen.
  2. Regelvorrichtung (C; C1, C2, CPU, 13, 14, 18, 19) für den Schusseintrag, nach Anspruch 1 bei welcher die Schusseintragsfaktor-Regeldaten die Zeit des Beginns des Schusseintrags regeln.
  3. Regelvorrichtung (C; C1, C2, CPU, 13, 14, 18, 19) für den Schusseintrag, nach Anspruch 1 oder 2, bei welcher die Schusseintragsfaktor-Regeldaten, allein oder zusätzlich, den Zeitpunkt des Fluideinblasens wenigstens einer der Schusseintragsdüsen (2, 3 - 10) regeln.
  4. Regelvorrichtung (C; C1, C2, CPU, 13, 14, 18, 19) für den Schusseintrag, nach einem der Ansprüche 1 bis 3, bei welcher die Schusseintragsfaktor-Regeldaten, zusätzlich oder allein, den Fluid-Druck (16, 17) wenigstens einer der Schusseintragsdüsen (2, 3 - 10) regeln.
  5. Regelvorrichtung (C; C1, C2, CPU, 13, 14, 18, 19) für den Schusseintrag, nach einem der Ansprüche 1 bis 4, bei welcher die Schusseintragsfaktor-Regeldaten, zusätzlich oder allein, die Zahl der Schusseinträge pro Minute der Webmaschine regeln.
  6. Regelvorrichtung (C; C1, C2, CPU, 13, 14, 18, 19) für den Schusseintrag, nach einem der Ansprüche 1 bis 5, bei welcher die Gewebebedingungs-Daten die Garnnummer des Schussgarns (Y) sind.
  7. Regelvorrichtung (C; C1, C2, CPU, 13, 14, 18, 19) für den Schusseintrag, nach einem der Ansprüche 1 bis 6, bei welcher die Gewebebedingungs-Daten, allein oder zusätzlich, die Breite des Webblatts der Webmaschine sind.
EP19910810395 1990-05-24 1991-05-24 Einschusskontrollvorrichtung für Luftwebmaschinen Expired - Lifetime EP0458753B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP13451990A JPH0819605B2 (ja) 1990-05-24 1990-05-24 ジェットルームにおける緯入れ制御装置
JP134519/90 1990-05-24

Publications (2)

Publication Number Publication Date
EP0458753A1 EP0458753A1 (de) 1991-11-27
EP0458753B1 true EP0458753B1 (de) 1996-10-16

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ID=15130226

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Application Number Title Priority Date Filing Date
EP19910810395 Expired - Lifetime EP0458753B1 (de) 1990-05-24 1991-05-24 Einschusskontrollvorrichtung für Luftwebmaschinen

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EP (1) EP0458753B1 (de)
JP (1) JPH0819605B2 (de)
DE (1) DE69122657T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5295515A (en) * 1991-02-25 1994-03-22 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for controlling weft insertion in jet loom
SE510657C2 (sv) * 1997-11-24 1999-06-14 Eltex Sweden Ab Övervakningsanordning
BE1013392A3 (nl) 2000-04-14 2001-12-04 Picanol Nv Werkwijze en inrichting voor het instellen van een weefmachine.
JP5423597B2 (ja) * 2010-06-28 2014-02-19 株式会社豊田自動織機 ジェットルームにおける緯入れ状態判別装置及び緯入れ制御装置
JP5866804B2 (ja) * 2011-05-31 2016-02-24 株式会社豊田自動織機 エアジェット織機におけるエア供給システム

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2715072B2 (ja) * 1987-05-12 1998-02-16 津田駒工業株式会社 よこ入れ装置の自動調整方法
JP2715078B2 (ja) * 1987-09-11 1998-02-16 津田駒工業株式会社 よこ入れ制御装置
DE58905019D1 (de) * 1988-05-26 1993-09-02 Sulzer Ag Webmaschine mit schusseintragsregelsystem.
DE3818766A1 (de) * 1988-06-02 1989-12-07 Dornier Gmbh Lindauer Duesensteuerung fuer einen luftwebstuhl

Also Published As

Publication number Publication date
EP0458753A1 (de) 1991-11-27
DE69122657T2 (de) 1997-05-15
JPH0434045A (ja) 1992-02-05
DE69122657D1 (de) 1996-11-21
JPH0819605B2 (ja) 1996-02-28

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