EP0458753A1 - Dispositif de contrôle de l'introduction de la trame pour métiers À  tisser à air - Google Patents

Dispositif de contrôle de l'introduction de la trame pour métiers À  tisser à air Download PDF

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Publication number
EP0458753A1
EP0458753A1 EP91810395A EP91810395A EP0458753A1 EP 0458753 A1 EP0458753 A1 EP 0458753A1 EP 91810395 A EP91810395 A EP 91810395A EP 91810395 A EP91810395 A EP 91810395A EP 0458753 A1 EP0458753 A1 EP 0458753A1
Authority
EP
European Patent Office
Prior art keywords
weft
data
picking
weft picking
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.)
Granted
Application number
EP91810395A
Other languages
German (de)
English (en)
Other versions
EP0458753B1 (fr
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/fr
Application granted granted Critical
Publication of EP0458753B1 publication Critical patent/EP0458753B1/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
    • D03D47/28—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.
  • 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.
  • Reference numeral 1 designates a device for measuring and storing a predetermined length of weft yarn Y by winding the same on a drum of the device 1. Further there is a fabric condition data input device 13 and a control computer C as means for establishing and determining control factor.
  • 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 V0.
  • injection of air under pressure from the auxiliary nozzles 3 - 10 is controlled by electro-magneticallly-operated valves V1, V2, V3, V4, V5, V6 V7, V8, respectively.
  • the control computer C includes a central processing unit CPU, data memory C1 and program memory C2.
  • the control computer C further includes a data input device 19 connected thereot for inputting data on fabric conditions.
  • the program memory C2 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 g1, g2, g3, g4, g5, g6, g7 are established so as to correspond respectively to fabric condition data groups G1, G2, G3, G4, G5, G6m G7 which are thus classified according to the rule of order in yarn number counts (1 - n6).
  • the likelihood of yarn number count 1 of the fabric condition data group G1 is "1"
  • that of yarn number count n1 of the same group G1 is "0”
  • the likelihood of yarn number count 1 of the condition data group G2 is "0"
  • that of yarn number count n1 is “1”
  • that of yarn number count n2 is "0"
  • functions f1, f2, f3, f4, f5, f6, f7 are established so as to correspond respectively to control factor groups F1, F2, F3, F4, F5, F6, F7 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 F1 is "1"
  • 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 F2 is "0”
  • that of valve open period ⁇ 2 is “1”
  • 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 control computer C Upon input of fabric condition data, or a data x on the number count of a weft yarn to be handled, through the data input device 19, the control computer C firstly determines the product-set G j ⁇ G j+1 of the condition data group G j and G j+1 in which the yarn number count data x falls. The control computer C then performs calculations of the functions g j (x) and g j+1 (x) for the above condition data groups G j and G j+1 .
  • functions g j and g j+1 for the parameter x are g2 and g3, respectively.
  • control computer C performs the calculations of functions f ⁇ 1 8-f and f ⁇ 1 8-(j+1) , which are inverse with respect to the functions f 8-j and f 8-(j+1) for the control factor groups F 8-j and F 8-(j+1) corresponding, respectively, to the above condition data groups G j and G j+1 , with g j (x) and g j+1 (x) as the parameters.
  • Two values are obtainable from such functional calculation for each of the parameters g j (x) and g j+1T(x) .
  • the area which is shaded with right-upward oblique lines is of a trapezoid shape with it top side defined by a line drawn between the points g jL and g jR
  • the area shaded with right downward oblique lines is of a trapezoid shape with its top side defined by a line drawn between the points g (j+1)L and g (j+1)R.
  • the control computer C performs calculation to find the point of gravity center Q( ⁇ x ) of the sum-set area of the above two trapezoid shapes.
  • 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 E1 in the diagram (a) of Fig. 3.
  • this curved line E1 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 E1 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 E1 in the diagram (a) of Fig. 3 is converted into discrete function E1′, 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 t1, t2, t3, t4, t5, t6, t7, 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 weft picking commencement time T y is determined by the time at which the stop pin 12a is moved away from engagement with the weft winding surface 1a of the weft measuring and storing device 1, which latter time is in turn determined by the time at which the solenoid 12 is energized.
  • the diagram (a) of Fig. 9 shows the weft picking commencement time T y for a reed with a relatively large width, while the diagram (b) of the same figure shows the weft picking commencement time T y for a reed with a relatively small width.
  • the time of air injection ( ⁇ i ′, ⁇ i ′) by the auxiliary nozzles 3 - 10 is changed in accordance with the change of weft picking commencement time T y .
  • the relationship thus obtained between the weft picking commencement time T y and the reed widths is represented by the curved line E2 shown in the diagram (a) of Fig. 7, and this line E2 is determined by grouping establishment of weft picking commencement times t1, t2, t3, t4, t5, t6, t7 from the experience and knowledge of experts and skilled workmen. Since such experience and knowledge used as the basis for the grouping of the weft picking commencement times t1, t2, t3, t4, t5, t6, t7 are very accurate, the curved line E2 can provide an optimum weft picking commencement time for each reed width.
  • the curved line E2 in the diagram (a) of Fig. 8 is converted into discrete function E2′, 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 C1 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 C2 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)
EP19910810395 1990-05-24 1991-05-24 Dispositif de contrÔle de l'introduction de la trame pour métiers à tisser à air Expired - Lifetime EP0458753B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP134519/90 1990-05-24
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

Publications (2)

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

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ID=15130226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910810395 Expired - Lifetime EP0458753B1 (fr) 1990-05-24 1991-05-24 Dispositif de contrÔle de l'introduction de la trame pour métiers à tisser à air

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Country Link
EP (1) EP0458753B1 (fr)
JP (1) JPH0819605B2 (fr)
DE (1) DE69122657T2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501920A1 (fr) * 1991-02-25 1992-09-02 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif de contrôle de l'insertion de trame dans un métier à jet
WO1999027172A1 (fr) * 1997-11-24 1999-06-03 Eltex Of Sweden Ab Dispositif de controle
WO2001079597A1 (fr) * 2000-04-14 2001-10-25 Picanol N.V. Procede pour le reglage de parametres de tissage pour des metiers mecaniques et dispositif de commande
CN102808273A (zh) * 2011-05-31 2012-12-05 株式会社丰田自动织机 喷气织机中的空气供给系统
EP2400050A3 (fr) * 2010-06-28 2014-12-17 Kabushiki Kaisha Toyota Jidoshokki Appareil pour déterminer le statut d'une insertion de trame et contrôleur d'insertion de trame dans une machine à tisser à jet d'air

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290975A1 (fr) * 1987-05-12 1988-11-17 Tsudakoma Corporation Commande automatique de l'insertion du fil de trame
EP0306998A1 (fr) * 1987-09-11 1989-03-15 Tsudakoma Corporation Dispositif de contrôle de l'insertion
EP0344104A1 (fr) * 1988-05-26 1989-11-29 GebràœDer Sulzer Aktiengesellschaft Métier à tisser avec système de réglage de l'insertion de la trame
WO1989012122A1 (fr) * 1988-06-02 1989-12-14 Lindauer Dornier Ges.M.B.H. Commande d'ajutages pour metier a tisser pneumatique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290975A1 (fr) * 1987-05-12 1988-11-17 Tsudakoma Corporation Commande automatique de l'insertion du fil de trame
EP0306998A1 (fr) * 1987-09-11 1989-03-15 Tsudakoma Corporation Dispositif de contrôle de l'insertion
EP0344104A1 (fr) * 1988-05-26 1989-11-29 GebràœDer Sulzer Aktiengesellschaft Métier à tisser avec système de réglage de l'insertion de la trame
WO1989012122A1 (fr) * 1988-06-02 1989-12-14 Lindauer Dornier Ges.M.B.H. Commande d'ajutages pour metier a tisser pneumatique

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501920A1 (fr) * 1991-02-25 1992-09-02 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif de contrôle de l'insertion de trame dans un métier à jet
US5295515A (en) * 1991-02-25 1994-03-22 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for controlling weft insertion in jet loom
WO1999027172A1 (fr) * 1997-11-24 1999-06-03 Eltex Of Sweden Ab Dispositif de controle
WO2001079597A1 (fr) * 2000-04-14 2001-10-25 Picanol N.V. Procede pour le reglage de parametres de tissage pour des metiers mecaniques et dispositif de commande
BE1013392A3 (nl) * 2000-04-14 2001-12-04 Picanol Nv Werkwijze en inrichting voor het instellen van een weefmachine.
US7110847B2 (en) 2000-04-14 2006-09-19 Picanol N.V. Method for adjusting the weaving parameters of weaving machines, and control device
EP2400050A3 (fr) * 2010-06-28 2014-12-17 Kabushiki Kaisha Toyota Jidoshokki Appareil pour déterminer le statut d'une insertion de trame et contrôleur d'insertion de trame dans une machine à tisser à jet d'air
CN102808273A (zh) * 2011-05-31 2012-12-05 株式会社丰田自动织机 喷气织机中的空气供给系统
CN102808273B (zh) * 2011-05-31 2014-07-02 株式会社丰田自动织机 喷气织机中的空气供给系统

Also Published As

Publication number Publication date
EP0458753B1 (fr) 1996-10-16
JPH0434045A (ja) 1992-02-05
JPH0819605B2 (ja) 1996-02-28
DE69122657T2 (de) 1997-05-15
DE69122657D1 (de) 1996-11-21

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