EP0765835B1 - Schussfadenspeicher für Textilmaschinen mit verschleissfesten Mitteln zum Schützen der Schussfadenreserve-überwachungsvorrichtung - Google Patents

Schussfadenspeicher für Textilmaschinen mit verschleissfesten Mitteln zum Schützen der Schussfadenreserve-überwachungsvorrichtung Download PDF

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Publication number
EP0765835B1
EP0765835B1 EP19960114777 EP96114777A EP0765835B1 EP 0765835 B1 EP0765835 B1 EP 0765835B1 EP 19960114777 EP19960114777 EP 19960114777 EP 96114777 A EP96114777 A EP 96114777A EP 0765835 B1 EP0765835 B1 EP 0765835B1
Authority
EP
European Patent Office
Prior art keywords
weft
shield
weft feeder
wearproof
monitoring 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.)
Expired - Lifetime
Application number
EP19960114777
Other languages
English (en)
French (fr)
Other versions
EP0765835A1 (de
Inventor
Pietro Zenoni
Giovanni Pedrini
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.)
LGL Electronics SpA
Original Assignee
LGL Electronics SpA
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 LGL Electronics SpA filed Critical LGL Electronics SpA
Publication of EP0765835A1 publication Critical patent/EP0765835A1/de
Application granted granted Critical
Publication of EP0765835B1 publication Critical patent/EP0765835B1/de
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
    • D03D47/34—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/72—Framework; Casings; Coverings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a weft feeder for textile machines with wearproof means for protecting the weft reserve monitoring device.
  • EP-A-0 192 851 describes a delivery device for continuous threads having a light monitor receiver.
  • weft feeders are devices provided with a fixed drum whereon a rotating arm, arranged at the base of said drum, winds a plurality of thread turns constituting a weft reserve.
  • the textile machine which is typically constituted by a loom, the turns of the reserve unwind from the drum, passing through braking means that control the thread tension.
  • a monitoring device is provided in order to detect the presence of the weft reserve turns on the drum and to activate or stop the rotating arm when said reserve reaches a minimum or, respectively, maximum number of turns.
  • the monitoring device generally includes a mechanical feeler that detects the presence of the turns, but in modern weft feeders the mechanical feeler has been replaced with so-called “contactless” sensors, typically magnetic ones, which have several advantages, the main one being their insensitivity to dust and to the presence of foreign objects in general.
  • a sensing device of this type which comprises fixed magnetic elements supported by the drum of the feeder and movable magnetic elements supported by the device itself, is disclosed in the prior Italian patent application no. TO94A00093 in the name of the same Applicant of the present Application and will be briefly termed "known magnetic sensor" hereinafter.
  • a principal aim of the present invention is to eliminate this drawback while allowing to use polymeric material to provide said protective shield, with the dual advantage of not hindering the correct operation of the magnetic sensor, on the one hand, and of providing an economically advantageous protective means, on the other hand, in view of the possibility of producing it with thermoforming methods that furthermore allow to optimize its shape.
  • a weft feeder with wearproof means for protecting the weft reserve monitoring device characterized in that said wearproof protection means are constituted by a shield made of thermoplastic polymeric material that is provided, at the side directed towards the base of the feeder drum, with a metallic protective sheet whereon a hardened surface layer is deposited so as to produce a given thickness.
  • said metal sheet is connected to the shield of polymeric material through self-threading screws and has an exposed surface layer that is hardened by chromium plating.
  • the reference numeral 10 generally designates the weft feeder, that conventionally comprises a base 11 and a fixed drum 12, whereon a hollow rotating arm 13, arranged at the base 12a of the drum, feeds a plurality of turns of thread constituting a weft reserve RT which, when demanded by the loom or other textile machine, unwinds from the drum, passing through a braking means 14 that controls the mechanical tension of the thread.
  • a conventional device with oscillating rods 15 causes the advancement of the turns of thread from the base 12a towards the free end 12b of the drum, and a monitoring device 16, arranged adjacent to the drum 12 and supported by a rigid arm 17, is provided in order to detect the presence of turns of weft reserve RT and to activate or stop the rotation of the arm 13 when said reserve reaches a minimum or maximum number of turns respectively.
  • the monitoring device 16 typically of the known type with movable magnetic elements described in the cited prior Italian patent application, is concealed and protected by a shield or housing 18 that runs parallel and adjacent to the drum 12 and is provided with the fixed magnetic elements -- not illustrated -- that interact with the moving elements of the device 16.
  • the shield 18 is made of thermoplastic polymeric material, typically chosen among the following materials: acetalic resin, ABS (acrylonitrile-butadiene-styrene), and polypropylene; shield 18 is provided, on its face 18a directed towards the base 12a of the drum 12, with a metallic protective sheet 19 capable of absorbing and neutralizing the stress that the thread F discharges onto the shield 18 when said thread, as a consequence of an accidental full depletion of the weft reserve RT, is arranged as shown in figure 3.
  • thermoplastic polymeric material typically chosen among the following materials: acetalic resin, ABS (acrylonitrile-butadiene-styrene), and polypropylene; shield 18 is provided, on its face 18a directed towards the base 12a of the drum 12, with a metallic protective sheet 19 capable of absorbing and neutralizing the stress that the thread F discharges onto the shield 18 when said thread, as a consequence of an accidental full depletion of the weft reserve RT, is arranged as shown in figure 3.
  • the sheet 19, applied on the face 18a of the shield 18, is rigidly coupled to said face, advantageously by means of self-threading screws 20 (figure 2) and is preferably made of one of the following metals or metallic alloys: aluminum, steel, copper, bronze.
  • the sheet 19 has, on its outer surface directed towards the base of the drum 11, a hardened layer that is applied so as to reach a given thickness, typically a layer of surface chromium plating.

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

Claims (5)

  1. Schußfadenspeicher (10) für Textilmaschinen mit verschleißfesten Mitteln zum Schützen einer Überwachungsvorrichtung (16) für die Schußfadenreserve (RT), dadurch gekennzeichnet, daß die verschleißfesten Mittel von einem Schutzschild (18) gebildet werden, das aus einem thermoplastischen Polymermaterial gemacht ist und das an der Seite (18a), die zur Basis (12a) der Trommel (12) des Schußfadenspeichers (10) hin gerichtet ist, mit einem Schutzmetallblech (19) vergehen ist, auf dem eine gehartete Oberflächenschicht aufgebracht ist, so daß eine vorgegebene Dicke erzeugt wird.
  2. Schußfadenspeicher nach Anspruch 1, dadurch gekennzeichnet, daß das Schutzmetallblech (19) durch Gewinde-Schneidschrauben (20) starr an das Schutzschild (18) gekoppelt ist.
  3. Schußfadenspeicher nach Anspruch 1, dadurch gekennzeichnet, daß das thermoplastische Polymermaterial des Schutzschildes unter den folgenden Materialien ausgewählt ist: Acetalharz, ABS, Polypropylen.
  4. Schußfadenspeicher nach Anspruch 1, dadurch gekennzeichnet, daß das Schutzmetallblech (19) aus einem der folgenden Metalle oder Metallegierungen gemacht ist: Aluminium, Stahl, Kupfer, Bronze.
  5. Schußfadenspeicher nach Anspruch 1, dadurch gekennzeichnet, daß das Schutzmetallblech (19) des Schutzschildes (18) eine Oberflächenauflageschicht aus Chrom aufweist.
EP19960114777 1995-09-28 1996-09-16 Schussfadenspeicher für Textilmaschinen mit verschleissfesten Mitteln zum Schützen der Schussfadenreserve-überwachungsvorrichtung Expired - Lifetime EP0765835B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO950213U 1995-09-28
ITTO950213 IT235945Y1 (it) 1995-09-28 1995-09-28 Apparecchio alimentatore di trama per macchine tessili, con mezziantiusura di protezione del dispositivo di sorveglianza della riserva

Publications (2)

Publication Number Publication Date
EP0765835A1 EP0765835A1 (de) 1997-04-02
EP0765835B1 true EP0765835B1 (de) 1999-05-26

Family

ID=11413386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960114777 Expired - Lifetime EP0765835B1 (de) 1995-09-28 1996-09-16 Schussfadenspeicher für Textilmaschinen mit verschleissfesten Mitteln zum Schützen der Schussfadenreserve-überwachungsvorrichtung

Country Status (3)

Country Link
EP (1) EP0765835B1 (de)
DE (1) DE69602566T2 (de)
IT (1) IT235945Y1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1609303B (zh) * 2003-10-23 2010-09-01 爱吉尔电子股份公司 用于纺织机的喂纱器的调制制动装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2701718C2 (de) * 1977-01-17 1979-02-08 Ab Iro, Ulricehamn (Schweden) Fadenspeicher- und -liefervorrichtung
DE3506490A1 (de) * 1985-02-23 1986-09-04 Sobrevin Société de brevets industriels-Etablissement, Vaduz Liefervorrichtung fuer laufende faeden

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1609303B (zh) * 2003-10-23 2010-09-01 爱吉尔电子股份公司 用于纺织机的喂纱器的调制制动装置

Also Published As

Publication number Publication date
EP0765835A1 (de) 1997-04-02
ITTO950213V0 (it) 1995-09-28
ITTO950213U1 (it) 1997-03-28
IT235945Y1 (it) 2000-07-18
DE69602566T2 (de) 2000-01-20
DE69602566D1 (de) 1999-07-01

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