EP0081502B1 - Woof preparation device for pneumatic looms - Google Patents

Woof preparation device for pneumatic looms Download PDF

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Publication number
EP0081502B1
EP0081502B1 EP19820901581 EP82901581A EP0081502B1 EP 0081502 B1 EP0081502 B1 EP 0081502B1 EP 19820901581 EP19820901581 EP 19820901581 EP 82901581 A EP82901581 A EP 82901581A EP 0081502 B1 EP0081502 B1 EP 0081502B1
Authority
EP
European Patent Office
Prior art keywords
woof
preparation device
aforesaid
controlled
thread
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
Application number
EP19820901581
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0081502A1 (en
Inventor
Johan T. Peeters
Filip N. Deconinck
Hugo A. Markey
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.)
Picanol NV
Original Assignee
Weefautomaten Picanol NV
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
Priority claimed from BE2/59215A external-priority patent/BE889255A/nl
Priority claimed from BE2/59272A external-priority patent/BE889677R/nl
Application filed by Weefautomaten Picanol NV filed Critical Weefautomaten Picanol NV
Priority to AT82901581T priority Critical patent/ATE12795T1/de
Publication of EP0081502A1 publication Critical patent/EP0081502A1/en
Application granted granted Critical
Publication of EP0081502B1 publication Critical patent/EP0081502B1/en
Expired 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
    • D03D47/367—Monitoring yarn quantity on the drum
    • 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

Definitions

  • the present invention relates to a woof preparation device for pneumatic looms.
  • Woof preparation devices are already known, which mainly consist of a stationary sto ⁇ kdrum on which the woof thread is wound and of mechanical means which, for every shot, separate the necessary number of windings from the following ones and release same for delivery to the main blower of the loom (FR-A-1478294). It is also known to provide a movable thrust piece or blocking component at the delivery end of the aforesaid drum, whereby the delivery of woof thread is prevented during a part of the weaving cycle.
  • the object of the invention is now to eliminate the problems mentioned hereinabove.
  • a shaft 2 is rotatably mounted in a support 1 mounted on the frame of a pneumatic loom.
  • This shaft is made so as to be partially hollow and carries a thread winder 3.
  • a stock-drum 4 is rotatably mounted on the shaft 2 .
  • the shaft 2 can be driven by means of an electric motor 5, the feeding of which is controlled by two optic detectors 6 and 7.
  • a magnet 8 carried by the support 1 cooperates with a little iron block 9 provided in the drum 4 to prevent any rotation of the drum.
  • the woof thread 10, coming from a spool 11 passes through shaft 2 and winder 3 in order to be wound by the latter around the drum 4 and reaches further, through a clamp 12, the main blower 13 of the loom.
  • a blocking component 14 which can be shifted from the active to the passive position and inversely by means of an electro-magnet 15.
  • the motor 5 is fed with current as long as detector 6 does not detect thread and this feeding stops as soon as detector 7 detects thread.
  • Means not shown, known themselves in principle, may be provided to ensure the displacement of the windings from one end of the drum to the other.
  • the electro-magnet 15 is being controlled either through a determined angular position of the main shaft or by means of the programmation of the loom, whereby the component 14 of the drum 4 becomes retracted (passive position).
  • the returning of this component of the active position is controlled, according to the invention, by means of a counter 16 which is provided at the delivery end of the drum 4. In this case this is an optic detector which cooperates with a little mirror 17 carried by the drum 4.
  • the detection signals are counted in a counter 18 properly speaking. As soon as a desired number of signals is reached, the feeding of electro-magnet 15 becomes interrupted until it is put again on the programmation at the intervention of the main shaft.
  • the drum 4 is preferably of a known type with a continuously adjustable diameter, so that the number of windings that are required per shot may remain constant, whatever the selected weaving breadth. This, however, does not exclude the possibility for the counter 18 to be adjustable.
  • the controlling device according to the invention is described hereinafter.
  • An oscillator 19 (figure 2) controls an infrared diode of sender-receiver 6.
  • the rays that are reflected on a reflecting plane 20 of the stock-drum 4 are received by a photo-transitor, which is amplified in 21 and further rectified in 22 to be sent to the switch 23.
  • the switch 23 When the plane 20 is covered by thread, the reflected signal is weak and the rectified signal is non-existent. Switch 23 then remains open.
  • a regulating circuit 24 controls a thyristo r 25 so that the motor r 5 sta rts rotating.
  • a tachometer with impulse giver 26 delivers a signal which is compared by the regulation circuit 24 with a value set by means of 27. Via the thyristor 25, the circuit 24 regulates the speed of the motor 5 so that it becomes equal to the set value.
  • One may set 27, independently of the quantity of woof to be delivered, in such a way that the motor 5 must start and stop a minimum number of times.
  • the fixing of the length of woof that is unwound each time takes place through counting a determined number of windings of the drum 4 with a known circumference during the pulling off of the thread and, when this number is reached, controlling the magnet 15 of the blocking component 14.
  • the change of the aforesaid number of windings may be seen as a rough adjustment, whilst the fine adjustment is preferably carried out through modifying the circumference of the drum.
  • the sender-receiver 16 (figure 3) is a part of a regulating circuit 28 which tries to adjust always in the same working area the signals received by 16, this in order to eliminate the influence of dust deposition on the thread, undesired light and aging.
  • This signal is used as a "set" for a flip-flop 30 which via a power stage 31 controls the little magnet 15 either to clamp or to release the thread.
  • the detected signal is transmitted to the counter 33 only when both the signal of the control 32 and of the detection 16 are high.
  • This counter 33 is adjustable and will, for instance, send a reset signal to the flip-flop only at the third thread.
  • the magnet 15 becomes energized and the thread is braked.
  • the adjustment of the detector 16 and magnet 15 is such that the magnet, after a count of three, has just the time of a winding left to attract.
  • An additional blower 34 is also controlled via a valve 35 by the time burst 29 and is used for increasing the speed of the thread when unwinding; (this blower is in fact an auxiliary blower of the main blower).
  • a second valve 36 ensures that in the stopped position there still remains a slight pressure on the main blower 13, so that the thread remains taut. In the case of the net falling out, the valve will be ruled out, whereby an unnecessary unwinding of the woof will be prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19820901581 1981-06-17 1982-05-26 Woof preparation device for pneumatic looms Expired EP0081502B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82901581T ATE12795T1 (de) 1981-06-17 1982-05-26 Fadenspeicher fuer duesenwebmaschinen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BE259215 1981-06-17
BE2/59215A BE889255A (nl) 1981-06-17 1981-06-17 Inslagvoorbereidingsinrichting voor luchtgetouwen
BE2/59272A BE889677R (nl) 1981-07-20 1981-07-20 Inslagvoorbereidingsinrichting voor luchtgetouwen
BE259272 1981-07-20

Publications (2)

Publication Number Publication Date
EP0081502A1 EP0081502A1 (en) 1983-06-22
EP0081502B1 true EP0081502B1 (en) 1985-04-17

Family

ID=25661765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820901581 Expired EP0081502B1 (en) 1981-06-17 1982-05-26 Woof preparation device for pneumatic looms

Country Status (4)

Country Link
EP (1) EP0081502B1 (enrdf_load_stackoverflow)
JP (1) JPS58500952A (enrdf_load_stackoverflow)
DE (1) DE3263098D1 (enrdf_load_stackoverflow)
WO (1) WO1982004446A1 (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4627474A (en) * 1982-09-03 1986-12-09 Aktiebolaget Iro Yarn storing, feeding and measuring device
SE8207098D0 (sv) * 1982-12-10 1982-12-10 Iro Ab Anordning for temporer upplagring och matning av uppmetta garnlengder, foretredesvis till dysvevmaskiner
JPS59125944A (ja) * 1982-12-27 1984-07-20 日産自動車株式会社 断片織機の緯糸供給装置
JPS59125946A (ja) * 1982-12-27 1984-07-20 津田駒工業株式会社 流体噴射式織機用多色自由交換型緯糸貯留装置
CS249155B1 (en) * 1984-08-23 1987-03-12 Vladimir Svaty Method and device for weft thread picking
FR2576885B1 (fr) * 1985-02-01 1987-06-12 Superba Sa Dispositif accumulateur de fils textiles
IT1184759B (it) * 1985-04-22 1987-10-28 Roy Electrotex Spa Porgitrama per telai di tessitura
DE3862671D1 (de) * 1987-04-08 1991-06-13 Sulzer Ag Schussfadenspeicher fuer eine webmaschine.
JP2587961B2 (ja) * 1987-10-30 1997-03-05 津田駒工業株式会社 よこ入れ装置のよこ糸測長方法
DE8800216U1 (de) * 1987-11-29 1989-03-30 Aktiebolaget Iro, Ulricehamn Vorrichtung zum Speichern, Liefern und Messen eines Fadens
JPH0387717U (enrdf_load_stackoverflow) * 1989-12-22 1991-09-06
BE1009172A3 (nl) * 1995-02-28 1996-12-03 Picanol Nv Grijperweefmachine met inslagdetectiemiddelen.
WO2020188762A1 (ja) * 2019-03-19 2020-09-24 オリンパス株式会社 超音波内視鏡

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1345166A (fr) * 1961-10-31 1963-12-06 Sobrevin Soc De Brevets Ind Et Appareil pour la mesure à haute précision de la longueur d'un fil pendant son enroulement
FR1478294A (fr) * 1966-05-04 1967-04-21 Sulzer Ag Métier à tisser comportant un accumulateur intermédiaire du fil de trame
DE1929485A1 (de) * 1969-06-11 1970-12-17 Sobrevin Liefervorrichtung fuer Faeden an Webmaschinen,Strickmaschinen od.dgl.
NL7612811A (nl) * 1976-11-17 1978-05-19 Rueti Te Strake Bv Inrichting voor het vormen van een voorraadwikkel uit een van een garenvoorraad aangevoerde draad.
DE2836206B2 (de) * 1978-08-09 1981-03-26 Gebrueder Sulzer Ag, 8401 Winterthur Elektronische Steuereinrichtung für eine Webmaschine
BE889255A (nl) * 1981-06-17 1981-12-17 Picanol Nv Inslagvoorbereidingsinrichting voor luchtgetouwen

Also Published As

Publication number Publication date
EP0081502A1 (en) 1983-06-22
JPS58500952A (ja) 1983-06-09
DE3263098D1 (en) 1985-05-23
JPS619423B2 (enrdf_load_stackoverflow) 1986-03-24
WO1982004446A1 (en) 1982-12-23

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