EP0412344A2 - Dispositif pour détacher l'extrémité de fil de la surface de canettes - Google Patents

Dispositif pour détacher l'extrémité de fil de la surface de canettes Download PDF

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Publication number
EP0412344A2
EP0412344A2 EP90114033A EP90114033A EP0412344A2 EP 0412344 A2 EP0412344 A2 EP 0412344A2 EP 90114033 A EP90114033 A EP 90114033A EP 90114033 A EP90114033 A EP 90114033A EP 0412344 A2 EP0412344 A2 EP 0412344A2
Authority
EP
European Patent Office
Prior art keywords
thread
knife
finder
cop
sensor
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
EP90114033A
Other languages
German (de)
English (en)
Other versions
EP0412344A3 (en
EP0412344B1 (fr
Inventor
Ulrich Dr. Wirtz
Helmuth Hensen
Hans-GÀ¼nter Wedershoven
Wolfgang Irmen
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
W Schlafhorst AG and Co
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 W Schlafhorst AG and Co filed Critical W Schlafhorst AG and Co
Publication of EP0412344A2 publication Critical patent/EP0412344A2/fr
Publication of EP0412344A3 publication Critical patent/EP0412344A3/de
Application granted granted Critical
Publication of EP0412344B1 publication Critical patent/EP0412344B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08Automatic end-finding and material-interconnecting arrangements
    • B65H67/086Preparing supply packages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/31Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a device for detaching the tail thread from the surface of cops according to the preamble of the first claim.
  • the cop production it is customary, for example on ring spinning machines, to form a backward twist with the end of the yarn, which runs from the tip of the head in the direction of the cop base.
  • the ring bench is moved relatively quickly from top to bottom, for example, when spindles are already running out.
  • the back winding can end in a reserve winding at the base of the sleeve.
  • this reserve winding is no longer present in the case of fully automatic doffing processes on the ring spinning machines.
  • the reserve and / or rear winding thread is first loosened by a suction tube cutter, then the beginning of the thread is wound on the surface of the bobbin and then searched for on the entire bobbin surface by means of a suction slot arranged in a suction tube Slit led to the next station, cut there and placed in the head sleeve.
  • Such devices are very expensive. In particular, due to the high air consumption, there is considerable energy consumption.
  • the US-PS 26 75 971 also describes a preparation device for cops, which are fed to the winding units of a winding machine.
  • the rear winding is loosened by means of a suction slot arranged along a suction tube by a hook formed from a bent wire.
  • This hook is mounted in a joint and is also displaced parallel to the longitudinal axis of the cops by the thread pull of the detected thread, thereby preventing the hook from penetrating into the thread layers.
  • the hook is in engagement with the surface of the cop until the cop has moved a certain amount along the transport path.
  • the hook grasps the rear winding thread immediately after it has come into contact with the surface of the bobbin, it pulls the thread part running in the direction of the bobbin tip tightly onto the surface of the bobbin winding. It is also to be expected that the detected thread will break relatively late due to the hook's downward deflection, as a result of which additional relatively flat, very firm turns are applied to the surface of the cop. The detection of the thread by subsequent devices is thus made considerably more difficult.
  • the object of the invention is to propose a device for loosening the thread on the surface of cops, which has a high efficiency.
  • the arrangement of a sensor which detects when the detected winding thread slides onto the thread loosener designed as a finder knife, makes it possible to initiate further steps directly via command signals.
  • the shape of the finder knife ensures a gentler treatment of the cop surface compared to the known hook consisting of a bent wire.
  • this drive can also be deactivated by a command signal generated by the sensor.
  • the arrangement of a finder guide in the area of the finder knife also has an advantageous effect on the protection of the cop surface, since the finder knife is positioned exactly and is prevented from penetrating into the thread turns.
  • the sensors are advantageously formed by light barriers, which consist of different arrangements of light sources and photocells.
  • the thread sliding onto the finder knife breaks through the respective light barrier at one or more points.
  • the success rate of cop preparation can be further increased if several finder knives that come into operation one after the other are arranged one above the other. After the sensor arranged at the lowest finder knife has recognized the thread, this finder knife is lifted off the surface of the cop and the finder knife arranged above it is pivoted to the surface of the cop. This prevents the thread from first tearing through the upper finder knife when the rear winding thread is detected, and the lower part of the rear winding remains on the lateral surface of the cop, which can subsequently lead to considerable difficulties during the winding process.
  • the beginning of the thread is placed loosely on the upper part of the bobbin surface, which makes it very easy to loosen the beginning of the thread in the region of the winding point, for example, if the thread of the winding point
  • the bobbin surface is released by an upward air flow surrounding the bobbin and fed to a feeder device.
  • the additional arrangement of a suction nozzle in the region of the cop base of the preparation device according to the invention may be necessary. In this case, however, the switching off of the drive for the bobbin rotation would have to be delayed after the sensor recognizes the winding thread. If several finder knives are arranged one above the other, it may be sufficient if the cop is rotated until the upper finder knife has also grasped the remaining part of the rear winding.
  • a cop 3 is fed upright on the arbor of a pallet 1 on the conveyor belt 5 of a conveyor track 2 of a preparation device according to the invention and positioned there.
  • the guidance of the pallet 1 along the transport path 2 is carried out by guide plates 6 and 6 '.
  • the Arrival of a pallet 1 is reported by a sensor 28 'via a control line 28' to a central control unit 60 which actuates a rotary solenoid 27 via a control unit 27 '.
  • a pivot rod 14 is rotated counterclockwise by the rotary solenoid 27.
  • a roll holder 13 with the pressure roller 12 is pivoted so that the pressure roller 12 bears against the base plate 1 'of the pallet 1.
  • the guide plate 6 has a recess 7.
  • the pressure roller 12 as a flanged roller, the pallet 1 can also be tilted slightly, so that the base plate 1 'no longer rests on the conveyor belt 5 with the entire surface of its underside.
  • the pressure roller 12 presses the base plate 1 'of the pallet 1 against two pulleys 11 on the opposite side of the transport path 2, of which only one can be seen in Fig. 1.
  • the flat belt 10 is driven by a motor 9 via a drive roller 8.
  • the engine 9 receives its control command signals via a control line 9 'from the central control unit 60.
  • the plate 61 on which both pulleys 11 and the drive roller 8 are mounted can also be pivoted. It is pivoted in synchronism with the swivel rod 14 and thus with the roll holder 13 for positioning the pallet.
  • a bracket 41 is also attached to the pivot rod 14 by means of a bracket 42 by means of a fastening screw 43. After swiveling the bracket presses so against the sleeve tip 3 'of the cop 3 that it is tilted slightly against the tilting direction of the pallet 1, whereby the frictional force on the Pallet 1 arbor increased. As a result, the rotary movement from the driven pallet 1 is also transmitted to the cop 3 in the direction of the arrow 4 when it is not seated tightly on the arbor.
  • an adjusting screw 44 it is possible to adjust the height of the bracket 41 to different cop lengths.
  • the angular position of the bracket 41 can be changed either by means of the fastening screw 43 or the adjusting screw 44.
  • the lower viewfinder guide 15 is rotatably mounted in a holder 23 by means of a pivot pin 21.
  • the bracket 23 is fastened to the swivel rod 14 by means of a fastening screw 25.
  • the finder knife 16 is attached to the finder guide 15 with fastening screws 19.
  • 15 elongated holes can be provided in the finder guide, in which the fastening screws 19 can be displaced, as a result of which the finder knife 16 can be adjusted according to the scope diameter.
  • a pivot lever 29 is attached on the viewfinder guide 15 opposite side of the pivot pin 21, a pivot lever 29 is attached.
  • This pivot lever 29 is connected via a swivel joint 29 'to the piston 31 of a pneumatic cylinder 33.
  • This cylinder 33 is fastened to the swivel lever 14 via a holder 39.
  • Air lines 35 and 36 open at the two ends of the pneumatic cylinder 33. These air lines 35 and 36 are connected to a compressed air source, not shown. They can be pressurized with compressed air alternately via valves, also not shown. The valves are controlled via the central control unit 60.
  • the piston 31 is shifted to the left.
  • the viewfinder guide 15 is pivoted clockwise by the transmission via the pivot 29 ', pivot lever 29 and pivot pin 21.
  • the finder knife 16 lifts off the surface of the cop. This process is initiated after the rear winding thread 47, which is gripped by the finder knife 16 and pushed onto its back, has interrupted the light barrier formed by a light source 48 and a photodiode 49.
  • the photodiode 49 has a connection 49 'to the central control unit 60, which then opens the valve leading to the air line 35.
  • FIG. 1 another viewfinder guide 17 with viewfinder knife 18 is attached to the pivot rod 14.
  • the structure corresponds to that of the lower arrangement of the finder guide 15.
  • the finder knife 18 with fastening screws 20 is fastened to the finder guide 17 analogously to the finder knife 16.
  • a pivot pin 22 is also arranged, which is connected on the opposite side to a pivot lever 30, which in turn has a pivot joint 30 '.
  • the pivot 30 ' is connected to a piston 32 which is guided in a pneumatic cylinder 34.
  • the pneumatic cylinder 34 is fastened to the swivel lever 14 by means of a holder 40.
  • air lines 37 and 38 are arranged, which are also connected to a compressed air source via valves, not shown.
  • the pivot pin 22 is mounted in a holder 24 by a fastening screw 26 is attached to the pivot rod 14.
  • the valves leading to the air lines 37 and 38 are also controlled by the central control unit 60.
  • the winding thread 47 has just been recognized by the sensor formed by the light source 48 and the photodiode 49, which is why the central control unit, which has received the success signal from the sensor, opens the valve to the air line 35, thereby guiding the viewfinder 15 with the finder knife 16 off the surface of the cop.
  • the valve which leads to the air line 38, is opened via the central control unit 60.
  • the piston 32 is displaced to the right in the pneumatic cylinder 34, as a result of which the finder guide 17 with the finder knife 18 is pivoted to the surface of the cop. This ensures that the thread search on the upper part of the head jacket only begins when the rear winding thread 47 has been detached from the lower finder knife 16.
  • the upper finder guide 17 is also equipped with a sensor, the success of the thread search is also detected there. Depending on this, the viewfinder guide 17 is then lifted off via the central control unit by a valve which leads to the air line 37.
  • a swiveling suction nozzle 50 is additionally arranged.
  • This suction nozzle 50 has a suction air connection 51.
  • this suction nozzle 50 could also be attached directly to the swivel arm 14. It would be sufficient if the suction nozzle 50 is only pivoted to the cops foot when the lower finder knife 16 has gripped the rear winding thread 47. Because with a longer reserve winding on the cops foot in most cases If the rear winding thread 47 is torn, the suction nozzle 50 can grip the lower end of the torn thread and, while maintaining the cop rotation, unwind and suck in the reserve thread.
  • the central control unit 60 deactivates the motor 9, as a result of which the rotational movement of the cop 3 is stopped.
  • the central unit 60 controls the rotary solenoid 27, which pivots the pivot rod 14 with all the devices attached to it in a clockwise direction, as a result of which all these devices are removed from the transport path 2.
  • the plate 61 is also pivoted. As a result, the pallet 1 with the cops 3 of the conveyor belt 5 is moved further in the direction of the arrow.
  • the motor 9 can also be put out of operation immediately by the pivoting mechanism for the finder guides 15 and 17 after reaching the end position via a switch (not shown).
  • another preparation device can also be arranged on the same transport route following the device according to the invention, which, for example, searches for the thread on the entire surface of the cop by means of suction air. This device would only operate if the search for the tail thread 47 on the device according to the invention was unsuccessful.
  • the central unit 60 there is a timer in which a maximum search time is stored. This ensures that even in exceptional cases, in which the finder knife 16 cannot grasp the winding thread 17 quickly enough, no jam is caused on the transport path 2 by the cop positioned at the treatment station. After the maximum search time has elapsed, therefore, even if no successful thread search was indicated by the sensor, all actuating units and the components of the positioning and drive device are pivoted away from the cop 3 so that it is released again. This is necessary in order to continuously supply the bobbin with fresh cops for unwinding.
  • pneumatic cylinders 33 and 34 instead of the pneumatic cylinders 33 and 34, other actuation devices can also be used, with the aid of which the finder guides 15 and 17 can be pivoted.
  • rotary solenoids are conceivable, which are fastened to the brackets 23 and 24 and which rotate the rotary bolts 21 and 22 by a certain amount about their longitudinal axis on the basis of control commands from the central control unit 60.
  • finder guides 15 and 17 it is also possible within the scope of the invention to replace the torsion bar 14 by a fixed bar.
  • the search guides 15 and 17 are then exclusive pivoted by means of the pivot pins 21 and 22.
  • the roll holder 13 then also requires a separate pivoting device.
  • the rounded shape of the bracket 41 also allows it to be arranged stationary.
  • the sleeve tip 3 'of the cop 3 then slides when the cop enters the preparation station via the bracket 41, whereby the cop is also tilted so that the frictional force increases sufficiently on the mandrel of the pallet 1 to the rotational movement of the pallet on the cop transferred to.
  • Fig. 2 contains the variant shown in Fig. 1 in an enlarged form.
  • the viewfinder guide 15 and 17 has a window 15 'and 17'.
  • a viewfinder knife 16, 18 protrudes through this window.
  • the wedge-shaped shape of the viewfinder knife is clearly recognizable.
  • the front edge of the finder knife 16, 18 projects beyond the side of the finder guide 15, 17 facing the cop surface.
  • the finder guide 15, 17 prevents the finder knife from penetrating into the thread of the cop 3.
  • the winding thread 47 slides on the back of the finder knife 16, 18.
  • the finder knife 53 is curved so that it has a light barrier, which is formed by the light source 54 and the photodiode 55, releases the viewfinder guide 52 within the window 52 '.
  • the photodiode 55 has a line 55 'which leads to the central control unit 60.
  • the thread search is successful, the light barrier is interrupted by thread triangles formed between the back of the finder knife 53 and the finder guide 52.
  • a light source 58 is attached to the finder knife 57 itself, which, together with the photodiode 59 attached to the finder guide 56, represents the light barrier forming the sensor.
  • the winding thread 47 interrupts the light barrier when the search is successful while it is sliding open.
  • the photodiode 59 has a line 59 ', via which the success of the thread search is transmitted to the central control unit 60.

Landscapes

  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Coiling Of Filamentary Materials In General (AREA)
EP90114033A 1989-08-05 1990-07-21 Dispositif pour détacher l'extrémité de fil de la surface de canettes Expired - Lifetime EP0412344B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3925988A DE3925988A1 (de) 1989-08-05 1989-08-05 Vorrichtung zum loesen des hinterwindungsfadens von der oberflaeche von kopsen
DE3925988 1989-08-05

Publications (3)

Publication Number Publication Date
EP0412344A2 true EP0412344A2 (fr) 1991-02-13
EP0412344A3 EP0412344A3 (en) 1992-11-25
EP0412344B1 EP0412344B1 (fr) 1994-10-19

Family

ID=6386607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90114033A Expired - Lifetime EP0412344B1 (fr) 1989-08-05 1990-07-21 Dispositif pour détacher l'extrémité de fil de la surface de canettes

Country Status (4)

Country Link
US (1) US5083715A (fr)
EP (1) EP0412344B1 (fr)
JP (1) JPH03138265A (fr)
DE (2) DE3925988A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5850729A (en) * 1996-06-24 1998-12-22 W. Schlafhorst Ag & Co. Apparatus for detaching the terminal spiral windings from the surface of a spinning cop
DE19917033B4 (de) * 1999-04-15 2009-01-22 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum Lösen des Hinterwindungsfadens von der Oberfläche von Spinnkopsen

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5289674A (en) * 1990-06-29 1994-03-01 Savio Winding machine with an in-line package preparer, and an improved spinning-winding method
DE4203934C2 (de) * 1991-09-21 2002-02-28 Schlafhorst & Co W Vorrichtung zum Lösen des Hinterwindungsfadens von der Oberfläche von Kopsen
US5310126A (en) * 1991-09-21 1994-05-10 W. Schlafhorst Ag & Co. Apparatus for loosening a reserve yarn winding from the periphery of a cop
DE9115995U1 (de) * 1991-12-23 1992-02-20 W. Schlafhorst AG & Co, 4050 Mönchengladbach Kopsvorbereitungseinrichtung
KR200481873Y1 (ko) * 2016-05-17 2016-12-06 정신정 차량번호판 고정볼트
CN107381232A (zh) * 2017-08-31 2017-11-24 山东华兴纺织集团有限公司 纱尾找头装置及自络找头机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675971A (en) * 1948-05-11 1954-04-20 Abbott Worsted Mills Inc Textile mechanism
DE1560427A1 (de) * 1963-03-12 1969-11-13 Murata Machinery Ltd Selbsttaetige Koetzerzufuehrungsvorrichtung
DE2531044A1 (de) * 1975-07-11 1977-01-27 Schlafhorst & Co W Automatische spulmaschine
EP0327993A1 (fr) * 1988-02-12 1989-08-16 W. SCHLAFHORST AG & CO. Procédé et dispositif pour chercher et détacher l'extrémité de fil enroulé sur une bobine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224694A (en) * 1961-09-11 1965-12-21 Murata Machinery Ltd Automatic cop feeder
CH430534A (de) * 1964-12-18 1967-02-15 Mettler Soehne Maschf Fadensuch- und Lösevorrichtung, insbesondere zur Vorbereitung eines Kopses zum folgenden Spulprozess
DE1560605B1 (de) * 1966-11-22 1970-10-22 Shimadzu Corp Vorrichtung zum Vorbereiten von Ablaufspulen fuer automatische Spulmaschinen
DE3821343A1 (de) * 1988-06-24 1989-12-28 Schlafhorst & Co W Verfahren und einrichtung zum pneumatischen erfassen und ueberkopfabziehen des fadenendes eines kopses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675971A (en) * 1948-05-11 1954-04-20 Abbott Worsted Mills Inc Textile mechanism
DE1560427A1 (de) * 1963-03-12 1969-11-13 Murata Machinery Ltd Selbsttaetige Koetzerzufuehrungsvorrichtung
DE2531044A1 (de) * 1975-07-11 1977-01-27 Schlafhorst & Co W Automatische spulmaschine
EP0327993A1 (fr) * 1988-02-12 1989-08-16 W. SCHLAFHORST AG & CO. Procédé et dispositif pour chercher et détacher l'extrémité de fil enroulé sur une bobine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5850729A (en) * 1996-06-24 1998-12-22 W. Schlafhorst Ag & Co. Apparatus for detaching the terminal spiral windings from the surface of a spinning cop
DE19917033B4 (de) * 1999-04-15 2009-01-22 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum Lösen des Hinterwindungsfadens von der Oberfläche von Spinnkopsen

Also Published As

Publication number Publication date
DE59007486D1 (de) 1994-11-24
DE3925988A1 (de) 1991-02-07
US5083715A (en) 1992-01-28
EP0412344A3 (en) 1992-11-25
EP0412344B1 (fr) 1994-10-19
JPH03138265A (ja) 1991-06-12

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