EP0319026A1 - Circuit de commande pour le contrôle de l'extraction automatique d'un fil de trame mal inséré sur un métier à tisser - Google Patents

Circuit de commande pour le contrôle de l'extraction automatique d'un fil de trame mal inséré sur un métier à tisser Download PDF

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Publication number
EP0319026A1
EP0319026A1 EP88120160A EP88120160A EP0319026A1 EP 0319026 A1 EP0319026 A1 EP 0319026A1 EP 88120160 A EP88120160 A EP 88120160A EP 88120160 A EP88120160 A EP 88120160A EP 0319026 A1 EP0319026 A1 EP 0319026A1
Authority
EP
European Patent Office
Prior art keywords
weft
circuit
input
output
correct
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.)
Withdrawn
Application number
EP88120160A
Other languages
German (de)
English (en)
Inventor
Václav Dipl.-Ing. Sedlicky
Vladimir Dipl.-Ing. Stepanek
Petr Dipl.-Ing. Velechovsky
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.)
Elitex Zavody Textilniho
Elitex Koncern Textilniho Strojirenstvi
Original Assignee
Elitex Zavody Textilniho
Elitex Koncern Textilniho Strojirenstvi
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 Elitex Zavody Textilniho, Elitex Koncern Textilniho Strojirenstvi filed Critical Elitex Zavody Textilniho
Publication of EP0319026A1 publication Critical patent/EP0319026A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085—Extraction of defective weft

Definitions

  • the invention relates to a control circuit for checking the automatic removal of a wrongly woven weft thread on weaving machines, in particular with pneumatic weft insertion.
  • a wrongly woven-in weft thread in the form of a thread loop is removed, which is drawn off in the direction of the shed side by the subsequent weft insertion length. It is not possible to check the correct functioning of the various automatic processes.
  • the defined sequence of the various processes is controlled by a cam system with associated electrical switches, which is connected to a power unit for the individual work processes for the automatic removal of the incorrectly woven-in weft.
  • the entire sequence of control signals is generated without it being possible to check whether the incorrectly woven-in weft has been successfully removed has been. It is precisely this lack of control that is the main disadvantage of this facility.
  • the object of the invention is to remedy these disadvantages and to prevent defects in the tissue which, for. B. caused by incorrect removal of incorrectly woven wefts.
  • an output of the weft monitor is connected to the input of a circuit for controlling the incorrect weft insertion, the output of which is connected to an input of an electrical control signal generator, and that a second output of the weft monitor is connected to the input of a circuit for checking the correct separation of the wrongly woven weft, the output of which is connected to an input of the generator of the control signals, and that an output of the weft monitor is connected to the input of a Circuit for checking the correct removal of the incorrectly woven weft is connected, the output of which is connected to an input of the generator of the control signals.
  • a loom 1 with pneumatic weft insertion is equipped with a control circuit for checking the automatic removal of a wrongly woven and / or incorrectly positioned weft thread.
  • This circuit contains a weft monitor 2, each with a z.
  • the sensor for the correct weft insertion in the weft monitor 2 monitors whether the weft has been transported from the conveying air flow to the edge of the web in the intended manner. As soon as the registered weft thread has been detected by this sensor, the weft monitor 2 sends a corresponding signal via a first output 21 to an input 31 of a circuit 3, the output 31 of which is connected to a first input 71 of an electrical or electronic control signal generator 7. This signal provides information about the correct course of the weft insertion into the web.
  • the second feeler associated with the weft monitor 2 for detecting a faulty weft insertion is arranged in the direction of the weft movement behind the first feeler and detects the presence of an incorrectly entered weft thread at a certain point in time and then also its removal.
  • a second output 22 of the weft monitor 2 is connected to the input 41 of a circuit 4 for checking the faulty weft insertion, the output 42 of which is connected to a second input 72 of the control signal generator 7.
  • a third output 23 of the weft monitor 2 is connected to the input 51 of a circuit 5 for checking the correct separation of the wrongly woven weft, the output 52 of which is connected to a third input 73 of the generator 7.
  • a fourth output 24 of the weft monitor 2 is connected to the input 61 of a circuit 6 for checking the correct removal of the incorrectly woven-in weft, the output 62 of which is connected to a fourth input 74 of the generator 7.
  • the control circuits 3 to 6 are e.g. B. formed by electrical semiconductor elements and can be conveniently integrated into the control signal generator 7.
  • the generator 7 expediently contains a microprocessor with a semiconductor memory in which a program for generating the Control signals are stored in a predetermined order.
  • the generator 7 also contains adaptation circuits of its own inputs and outputs 71 to 75. A plurality of outputs 75 of the generator 7 lead to corresponding inputs 81 of a power unit 8 for the automatic removal of the incorrectly woven-in weft.
  • This power unit 8 contains, among other things, pneumatic nozzle systems for both the weft insertion and for the removal of a wrongly woven weft thread, a mechanism for separating the wrongly woven weft thread and a mechanism for removing such a weft thread from the shed.
  • the sensor for the correct weft thread entry associated with the weft guard 2 detects the absence of a weft thread
  • an electrical signal is sent from its first output 21 to the input 31 of the circuit 3, in which the signal is processed and via the output 32 to the input 71 of the control signal generator 7 is supplied.
  • stored control signals are called up in the predetermined order and fed via their outputs 75 to the inputs 81 of the power unit 8. Thereupon, this power unit 8 begins to remove the incorrectly woven weft.
  • the generator 7 tests at its inputs 73 and 74 the state of the circuit 5 for checking the correct separation of the weft and the state of the circuit 6 for checking the correct removal of the weft. Insofar as these two control circuits 5 and 6 send signals that the automatic removal of the incorrectly woven-in weft proceeds correctly, the generator 7 generates the entire sequence of control signals for the power unit 8 for the automatic removal of the incorrectly woven-in weft. In the opposite case, the generation of the control signals is interrupted.
  • the weft monitor 2 sends a signal from its output 22 to the input 41 of the circuit 4, in which the signal is processed and passed via its output 42 to the second input 72 of the control signal generator 7, the generator 7 only generates a shutdown signal to stop the weaving machine and the automatic removal of the incorrectly woven-in weft thread is interrupted.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP88120160A 1987-12-02 1988-12-02 Circuit de commande pour le contrôle de l'extraction automatique d'un fil de trame mal inséré sur un métier à tisser Withdrawn EP0319026A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS878738A CS267634B1 (en) 1987-12-02 1987-12-02 Connection for incorrectly connected weft's automatic removal checking with looms
CS8738/87 1987-12-02

Publications (1)

Publication Number Publication Date
EP0319026A1 true EP0319026A1 (fr) 1989-06-07

Family

ID=5438382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88120160A Withdrawn EP0319026A1 (fr) 1987-12-02 1988-12-02 Circuit de commande pour le contrôle de l'extraction automatique d'un fil de trame mal inséré sur un métier à tisser

Country Status (2)

Country Link
EP (1) EP0319026A1 (fr)
CS (1) CS267634B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5322090A (en) * 1992-03-16 1994-06-21 Lindauer Dornier Gesellschaft Mbh Method and apparatus for readying a defined weft thread reserve when there is a loom stoppage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1904584A1 (de) * 1968-02-28 1969-09-18 Etag Textilwerke Gmbh Verfahren und Einrichtung zum knotenfreien Weben
EP0236597A1 (fr) * 1986-03-11 1987-09-16 Tsudakoma Corporation Dispositif pour éloigner un fil de trame cassé à un métier à tisser sans navette

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1904584A1 (de) * 1968-02-28 1969-09-18 Etag Textilwerke Gmbh Verfahren und Einrichtung zum knotenfreien Weben
EP0236597A1 (fr) * 1986-03-11 1987-09-16 Tsudakoma Corporation Dispositif pour éloigner un fil de trame cassé à un métier à tisser sans navette

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5322090A (en) * 1992-03-16 1994-06-21 Lindauer Dornier Gesellschaft Mbh Method and apparatus for readying a defined weft thread reserve when there is a loom stoppage

Also Published As

Publication number Publication date
CS873887A1 (en) 1989-06-13
CS267634B1 (en) 1990-02-12

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