EP3461775B1 - Device for positioning a thread at a workstation of a textile machine comprising a suction nozzle and a feeding element - Google Patents

Device for positioning a thread at a workstation of a textile machine comprising a suction nozzle and a feeding element Download PDF

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Publication number
EP3461775B1
EP3461775B1 EP18198069.9A EP18198069A EP3461775B1 EP 3461775 B1 EP3461775 B1 EP 3461775B1 EP 18198069 A EP18198069 A EP 18198069A EP 3461775 B1 EP3461775 B1 EP 3461775B1
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EP
European Patent Office
Prior art keywords
thread
suction nozzle
cover element
guiding element
suction
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.)
Active
Application number
EP18198069.9A
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German (de)
French (fr)
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EP3461775A1 (en
Inventor
Mario Maleck
Robert Hagl
Thomas Gruber
Robin Wein
Christian Kettner
Bernd Bahlmann
Romeo Pohn
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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Publication date
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Publication of EP3461775A1 publication Critical patent/EP3461775A1/en
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Publication of EP3461775B1 publication Critical patent/EP3461775B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
    • B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor

Definitions

  • the present invention relates to a device for attaching a thread to a workstation of a textile machine with a suction nozzle for picking up a thread end of the thread from a bobbin, the suction nozzle having a suction port, a suction channel and an inlet opening for the thread.
  • the device furthermore has a feed member arranged movably opposite the suction nozzle for forming a thread loop from the thread end picked up by the suction nozzle.
  • the feeder element has a cover element for closing the inlet opening of the suction nozzle and a thread guide element and is between a first position in which the thread guide element is located within the suction channel and the cover element closes the inlet opening of the suction nozzle, and a second position in which the thread guide element is located is located outside the suction channel and the cover element exposes the inlet opening of the suction nozzle, movable back and forth.
  • the DE 3 515 765 A1 shows a suction nozzle which is arranged in a movable maintenance device. After the thread has been successfully sucked in, the suction nozzle is removed a little from the bobbin surface so that the sucked-in thread is stretched between the suction nozzle and the bobbin is. Subsequently, a feeder element, which is also arranged in the movable maintenance device, is fed to the thread, which grabs the tensioned thread and transfers it to another handling element, forming a thread loop.
  • each of the work stations has its own suction nozzle.
  • Such a textile machine is in the EP 1 283 288 A2 described.
  • a pivotably mounted suction nozzle is provided at each of the workplaces, which picks up the thread from the bobbin surface in a first position and, after the thread end has been successfully sucked in, is pivoted into a second position in order to deliver the sucked-in thread end to other handling elements at the workstation.
  • the swiveling suction nozzle has a comparatively large space requirement and is structurally complex.
  • a textile machine with a workplace-specific suction nozzle which is fixedly arranged at the workplace, has also become known.
  • the stationary suction nozzle is assigned a movable feed element.
  • the feeder organ has a thread guide area which is already introduced into a suction channel of the suction nozzle before the thread end is sucked in, so that the thread end simultaneously enters the thread guide area of the feeder organ when it is sucked into the suction nozzle.
  • the feeder element can be pivoted in order to deliver the thread end to the further handling element while forming a thread loop.
  • the suction nozzle has an inlet opening for the thread guiding area of the feeder element and for leading the sucked thread out of the suction nozzle. During the search for the thread end on the bobbin surface, this inlet opening must be sealed.
  • the feeder organ has a cover element.
  • the object of the present invention is to propose a device for attaching a thread which enables a reliable sealing of the inlet opening of the suction nozzle during the thread search.
  • a device for attaching a thread to a work station of a textile machine has a suction nozzle for picking up a thread end of the thread from a bobbin, the suction nozzle having a suction port, a suction channel and an inlet opening for the thread. Furthermore, the device has a feeder element arranged movably opposite the suction nozzle for forming a thread loop from the thread end taken up by the suction nozzle, the feeder element having a cover element for closing the inlet opening of the suction nozzle and a thread guide element.
  • the feeder element is between a first position in which the thread guide element is located inside the suction channel and the cover element closes the inlet opening of the suction nozzle, and a second position in which the thread guide element is located outside the suction channel and the cover element releases the inlet opening of the suction nozzle and moveable.
  • the thread guide element has an open contour.
  • the cover element is only slightly stiffened by the thread guide element. This increases the flexibility of the cover element so that it can better adapt to the surface of the suction nozzle in the area of the inlet opening. In particular, the areas of the cover element which are not connected to the thread guide element can thereby adapt particularly well to the contour of the inlet opening and seal it off better. At the same time will Due to the open contour of the thread guide element, the flow inside the suction nozzle is less impaired, which supports the safe suction of the thread end and leads to reduced energy consumption. In addition, compared to a thread guide element with a closed contour, in particular when manufacturing the thread guide elements from a sheet metal material, a material saving can be achieved.
  • the cover element consists of a plastic material.
  • the cover element can be designed to be particularly flexible, so that it can also adapt particularly well to the contour of the suction nozzle and thus better seal the inlet opening.
  • the suction nozzle is made of a harder material than the cover element or the cover element is made of a softer material than the suction nozzle, so that solely due to the negative pressure prevailing in the suction nozzle, which draws the softer cover element towards the suction nozzle sealing can be improved.
  • the cover element is also bent in its longitudinal direction.
  • the longitudinal direction of the inlet opening is understood to mean the direction of the largest dimension of the inlet opening.
  • the longitudinal direction of the cover element is understood to mean the direction of the largest dimension of the cover element. Due to the curved contour, the sealing can be further improved, in particular in the area of the two longitudinal ends of the cover element or in the area of the two longitudinal ends of the inlet opening.
  • the inlet opening of the suction nozzle and the cover element each have at least one, preferably at least one each have two mutually opposite, beveled edges, which each form a sealing surface.
  • at least the two edges of the inlet opening and the cover element running in the longitudinal direction of the inlet opening are beveled, in the case of a rectangular inlet opening particularly preferably all four edges delimiting the inlet opening.
  • the cover element is provided with a sealing lip on its side facing the thread guide element, ie on the side facing the suction channel of the suction nozzle in the first position of the feeder element.
  • the sealing lip is preferably made from a flexible plastic material.
  • the sealing lip advantageously enables sealing even in the case of an uneven sealing gap between the suction nozzle and the cover element.
  • a silicone material or an elastomer material, for example, can be used as the flexible plastic material.
  • the cover element has at least one holding element, preferably several holding elements spaced apart from one another, on its side facing the thread guide element.
  • the sealing lip is only pushed onto the holding element or the holding elements. Because the sealing lip is only loosely attached, it is also slightly sucked in during the suction of the thread end by the negative pressure in the suction nozzle, which leads to an improved sealing effect. A self-sealing construction of the cover element is thus achieved.
  • the thread guide element is attached to the cover element off-center with respect to the longitudinal direction of the cover element, in particular on or in the region of a longitudinal end of the cover element.
  • the sealing in a central area of the cover element between the two longitudinal ends is hereby facilitated, in particular with a curved cover element and a curved contour of the suction nozzle.
  • the thread guide element consists of a sheet metal material, in particular a stainless steel sheet material or an aluminum sheet material.
  • the thread guide element can be produced in a particularly simple manner by punching or laser cutting.
  • the fiber guiding element is made entirely or partially (i.e. one or more sections of the fiber guiding element) from a ceramic material.
  • a ceramic material For example, it would be conceivable to manufacture the fiber guiding element or corresponding sections thereof by a 3D printing process and then to provide them with a ceramic layer by sintering.
  • the thread guide element is provided with a coating and / or is polished.
  • a thread guide element made of sheet aluminum material can be provided with an aluminum oxide layer, or a thread guide element made of sheet steel material can be provided with a DLC (diamond-like carbon) coating.
  • the thread guide element is provided with a friction-reducing coating. In this way, on the one hand, damage to the thread can be avoided. Furthermore, wear of the thread guide element can be counteracted by friction-reducing, but wear-resistant coatings. It is therefore also advantageous if the thread guide element is polished is. This also makes it possible to reduce the coefficient of friction of the thread guide element and thus also wear thereof.
  • the thread guide element has at least one first thread guide edge with a first fixing contour for a piece of thread to be removed and at least one second thread guide edge with a second fixing contour for a piece of thread to be attached.
  • Figure 1 shows a schematic side view of a work station 2 of a textile machine 1 in a sectional view.
  • the textile machine 1 is designed as a spinning machine and, as the thread delivery device 3, has a spinning device in which a thread 4 is produced.
  • the thread 4 is drawn off from the thread feed device 3 by means of two take-off rollers 5 and fed to a winding device 6, where it is wound onto a bobbin 7.
  • the textile machine 1 it would also be possible for the textile machine 1 not to be designed as a spinning machine, but rather as a winding machine.
  • the work station 2 has, as the thread delivery device 3, an unwinding bobbin, from which the thread 4 is again drawn off and wound onto a bobbin 7 as described above.
  • the work station 2 of the textile machine 1 shown here is also designed as an autonomous work station 2 which, after an interruption in production, is able to insert a thread end 4a (see FIG Figure 2 ) to start again independently.
  • the thread end 4a is returned to the spinning device, where it is reconnected with other fibers to be tied into the thread.
  • a thread end 4a coming from the bobbin 7 is connected to a thread end of the pay-off bobbin, not shown here.
  • the work station 2 shown here is provided with a device 16 for attaching a thread 4.
  • the device 16 for attaching the thread 4 has a suction nozzle 8, by means of which a thread end 4a that has run onto the bobbin 7 (see FIG Figure 2 ) of the thread 4 is sought and can be sucked into a suction channel 9 of the suction nozzle 8.
  • the suction nozzle 8 In order to apply negative pressure to the suction channel 9, the suction nozzle 8 is connected to a negative pressure channel 10 in a manner known per se. To suck in the thread end 4a, the suction nozzle 8 has a suction opening 11.
  • the device 16 also contains a feeder element 13, by means of which the thread end 4a picked up by the suction nozzle, forming a thread loop (see FIG Figure 3 ) can be delivered to an attachment element 17 or another handling element of the work station 2 or can also be fed directly to the thread delivery device 3.
  • the feeder member 13 has a movably, in particular pivotably, mounted lever 24 which is provided with a thread guide element 15 in which the thread end 4a can be received by the suction nozzle 8.
  • the movement of the feeder organ 13 is symbolized in the present case by the arrow and the dashed, second representation of the feeder organ 13.
  • the suction nozzle is arranged in a stationary manner at the work station 2, the thread 4 running through the suction nozzle 8 during regular operation of the work station 2.
  • the thread 4 enters the suction nozzle 8 through an inlet opening 12 and leaves it through the suction opening 11.
  • the feeder element 13 has a cover element 14.
  • the feeder element 13 is between a first position I (see Figure 2 ) for taking over the thread end 4a from the suction nozzle 8 and a second position II for forming the thread loop and for transferring the thread end 4a.
  • the thread guide element 15 is located outside the suction channel 9 of the suction nozzle 8 and the cover element 14 releases the inlet opening 12 of the suction nozzle 8 so that the thread 4 can run through the suction nozzle 8 during production.
  • FIG. 2 now shows the work station 2 of the textile machine 1 in a situation in which the thread end 4a has just been sucked into the suction nozzle 8 after an interruption in production.
  • the feeder element 13 is first moved into its first position I, in the present case pivoted.
  • the thread guide element 15 is located within the suction channel 9 of the suction nozzle 8 and the cover element 14 closes the inlet opening 12 of the suction nozzle 8.
  • the suction nozzle 8 can now be subjected to negative pressure via the negative pressure channel 10 and the thread end 4a on the surface of the bobbin 7 visit.
  • FIG. 3 shows a further situation of the work station 2 of the textile machine 1, in which the sucked-in thread end 4a is in the present case fed to the attachment member 17 with the formation of a thread loop.
  • the feeder element 13 is moved from its first position I (see FIG Figure 2 ) moves back into its second position II, in which the cover element 14 releases the inlet opening 12 and the thread guide element 15 is located outside of the suction channel 9.
  • a thread piece 4b to be attached and a thread piece 4c to be removed have now been formed from the original thread end 4a.
  • the two pieces of thread 4b and 4c can now be separated, for example by the attachment member 17, so that the piece of thread 4b can be fed to the thread delivery device 3 for attachment and the piece of thread 4c can be sucked into the vacuum channel and disposed of via it.
  • the thread guide element 15 is no longer designed as a closed contour in the form of an eyelet, but as an open contour.
  • Figure 4 shows the device 16 with the suction nozzle 8 with the suction channel 9 and the feeder element 13 in a schematic cross-sectional view.
  • the feeder element 13 is shown in its first position I in which the cover element 14 closes the inlet opening 12 of the suction nozzle 8 and the thread guide element 15 is located in the suction channel 9.
  • the thread guide element 15 is arranged eccentrically with respect to the longitudinal direction of the cover element 14. In the present case, the thread guide element 15 is arranged in the region of a longitudinal end 14a of the cover element 14.
  • the cover element 14 can thereby in particular at the other, the first longitudinal end 14a, at which the thread guide element 15 is arranged, flexibly adapt the opposite longitudinal end 14a to the inlet opening 12.
  • first thread guide edge 20 can be found on which, when the thread loop is opened (see Figure 3 ) the piece of thread 4c to be discharged slides along until it is finally fixed to a first fixing contour 21.
  • the thread piece 4b to be attached slides along a second thread guide edge 22 during the further tensioning of the thread loop until it is finally fixed to a second fixing contour 23. After the thread loop has been completely tensioned, the thread piece 4b to be attached and the thread piece 4c to be removed can thus be separated from one another by the thread guide element 15, as already described above.
  • Figure 5 shows another embodiment of a device 16 for attaching a thread end 4a, in which the cover element 14 is bent in its longitudinal direction.
  • the suction nozzle 8 at least the region of the suction nozzle 8 surrounding the inlet opening 12 is curved in its longitudinal direction.
  • the longitudinal direction corresponds to the largest dimension of the slot-shaped inlet opening 12.
  • the sealing of the inlet opening 12 by the cover element 14 is hereby facilitated.
  • a sealing lip 18 is also shown, which is attached to the cover element 14 and also facilitates the sealing of the inlet opening 12.
  • the cover element 14 and the sealing lip 18 are made of a plastic material, they are particularly flexible, so that an improved seal can be achieved simply by sucking in the cover element 14 with the sealing lip 18 through the negative pressure.
  • An increased contact pressure on the cover element 14, for example by a drive the feeder organ 13 is not required.
  • the sealing lip 18 is arranged on the side of the cover element 14 facing the thread guide element 15 and thus on the inside of the cover element 14 and is in connection with the suction channel 9 and thus also with the negative pressure prevailing therein during suction.
  • the side of the cover element 14 facing away from the thread guide element 15 faces the outside of the suction nozzle 8.
  • the cover element 14 in the present case has a plurality of holding elements 19 onto which the sealing lip 18 is slipped.
  • the holding elements 19 are at a distance from one another, so that the sealing lip 18 is not connected to the cover element 14 over the entire surface.
  • the sealing lip 18 can thus move with respect to the cover element 14, which facilitates the suction of the sealing lip 18 due to the negative pressure prevailing inside the suction channel 9.
  • Figure 6 shows a plan view of the inside or the side of the cover element 14 facing the thread guide element 15, to which the sealing lip 18 is applied.
  • the holding elements 19 are arranged in two rows, in the present case above and below the thread guide element 15.
  • Figure 7 shows a schematic, broken longitudinal section view of a device 16 for attaching a thread end 4a according to a further, alternative embodiment.
  • the inlet opening 12 of the suction nozzle 8 in the present case has two beveled edges lying opposite one another and running in the longitudinal direction of the inlet opening 12. These each form one Sealing surface 25 for the cover element 14.
  • the two edges running in the longitudinal direction of the inlet opening 12 are also beveled and form sealing surfaces 25.
  • all edges delimiting the inlet opening 12 or all edges of the cover element 14 are beveled or provided with a circumferential, beveled edge in order to achieve a particularly good seal.
  • the edges of the cover element 14 are beveled in each case corresponding to the edges of the inlet opening 12, so that the inlet opening 12 is designed as a positive shape and the cover element 14 is designed as a negative shape.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zum Ansetzen eines Fadens an einer Arbeitsstelle einer Textilmaschine mit einer Saugdüse zum Aufnehmen eines Fadenendes des Fadens von einer Spule, wobei die Saugdüse eine Ansaugmündung, einen Saugkanal sowie eine Eintrittsöffnung für den Faden aufweist. Die Vorrichtung weist weiterhin ein beweglich gegenüber der Saugdüse angeordnetes Zubringerorgan zum Bilden einer Fadenschlaufe aus dem von der Saugdüse aufgenommenen Fadenende auf. Das Zubringerorgan weist ein Deckelelement zum Verschließen der Eintrittsöffnung der Saugdüse sowie ein Fadenführungselement auf und ist zwischen einer ersten Stellung, in welcher das Fadenführungselement sich innerhalb des Saugkanals befindet und das Deckelelement die Eintrittsöffnung der Saugdüse verschließt, und einer zweiten Stellung, in welcher das Fadenführungselement sich außerhalb des Saugkanals befindet und das Deckelelement die Eintrittsöffnung der Saugdüse freigibt, hin und her bewegbar.The present invention relates to a device for attaching a thread to a workstation of a textile machine with a suction nozzle for picking up a thread end of the thread from a bobbin, the suction nozzle having a suction port, a suction channel and an inlet opening for the thread. The device furthermore has a feed member arranged movably opposite the suction nozzle for forming a thread loop from the thread end picked up by the suction nozzle. The feeder element has a cover element for closing the inlet opening of the suction nozzle and a thread guide element and is between a first position in which the thread guide element is located within the suction channel and the cover element closes the inlet opening of the suction nozzle, and a second position in which the thread guide element is located is located outside the suction channel and the cover element exposes the inlet opening of the suction nozzle, movable back and forth.

Bei Textilmaschinen wie Spinnmaschinen oder Spulmaschinen, bei welchen kontinuierlich ein Faden produziert oder von einer Ablaufspule geliefert wird und auf eine Spule aufgewickelt wird, ist es nach Unterbrechungen des Produktionsprozesses wie beispielsweise einem Fadenbruch oder einen Reinigerschnitt erforderlich, den Faden wieder neu anzusetzen. Hierzu ist es bekannt geworden, mittels einer Saugdüse das auf die Spule aufgelaufene Ende des Fadens aufzusuchen und in die Saugdüse einzusaugen, um es von dort weiteren Handhabungsorganen zum Ansetzen zu übergeben.In textile machines such as spinning machines or winding machines, in which a thread is continuously produced or delivered from a pay-off bobbin and wound onto a bobbin, it is necessary to start the thread again after interruptions in the production process, such as a thread break or a cleaner cut. For this purpose, it has become known to use a suction nozzle to locate the end of the thread that has accumulated on the bobbin and to suck it into the suction nozzle in order to transfer it from there to other handling organs for attachment.

Die DE 3 515 765 A1 zeigt eine Saugdüse, welche in einer verfahrbaren Wartungseinrichtung angeordnet ist. Nach dem erfolgreichen Einsaugen des Fadens wird die Saugdüse ein Stück weit von der Spulenoberfläche entfernt, so dass der eingesaugte Faden zwischen der Saugdüse und der Spule aufgespannt ist. Anschließend wird ein ebenfalls in der verfahrbaren Wartungseinrichtung angeordnetes Zubringerorgan dem Faden zugestellt, welches den aufgespannten Faden erfasst und unter Bildung einer Fadenschlaufe zum Ansetzen an ein weiteres Handlingsorgan übergibt.The DE 3 515 765 A1 shows a suction nozzle which is arranged in a movable maintenance device. After the thread has been successfully sucked in, the suction nozzle is removed a little from the bobbin surface so that the sucked-in thread is stretched between the suction nozzle and the bobbin is. Subsequently, a feeder element, which is also arranged in the movable maintenance device, is fed to the thread, which grabs the tensioned thread and transfers it to another handling element, forming a thread loop.

Weiterhin sind Textilmaschinen bekannt geworden, bei welchen jede der Arbeitsstellen über eine arbeitsstelleneigene Saugdüse verfügt. Eine derartige Textilmaschine ist in der EP 1 283 288 A2 beschrieben. Dabei ist an jeder der Arbeitsstellen eine schwenkbar gelagerte Saugdüse vorgesehen, welche in einer ersten Stellung den Faden von der Spulenoberfläche aufnimmt und nach erfolgreichem Einsaugen des Fadenendes in eine zweite Stellung verschwenkt wird, um das eingesaugte Fadenende weiteren Handhabungsorganen der Arbeitsstelle zuzustellen. Die schwenkbare Saugdüse hat einen vergleichsweise hohen Platzbedarf und ist konstruktiv aufwändig.Furthermore, textile machines have become known in which each of the work stations has its own suction nozzle. Such a textile machine is in the EP 1 283 288 A2 described. A pivotably mounted suction nozzle is provided at each of the workplaces, which picks up the thread from the bobbin surface in a first position and, after the thread end has been successfully sucked in, is pivoted into a second position in order to deliver the sucked-in thread end to other handling elements at the workstation. The swiveling suction nozzle has a comparatively large space requirement and is structurally complex.

Aus der DE 10 2015 112 660 A1 ist weiterhin eine Textilmaschine mit einer arbeitsstelleneigenen Saugdüse bekannt geworden, welche fest an der Arbeitsstelle angeordnet ist. Um das Fadenende dennoch an ein weiteres Handlingsorgan der Arbeitsstelle zustellen zu können, ist der feststehenden Saugdüse ein bewegbares Zubringerorgan zugeordnet. Das Zubringerorgan weist einen Fadenleitbereich auf, der bereits vor dem Einsaugen des Fadenendes in einen Saugkanal der Saugdüse eingebracht wird, so dass das Fadenende beim Einsaugen in die Saugdüse zugleich in den Fadenleitbereich des Zubringerorgans gelangt. Nach erfolgreicher Aufnahme des Fadenendes kann das Zubringerorgan verschwenkt werden, um das Fadenende unter Bildung einer Fadenschlaufe dem weiteren Handlingsorgan zuzustellen. Die Saugdüse weist eine Eintrittsöffnung für den Fadenleitbereich des Zubringerorgans und das Herausführen des angesaugten Fadens aus der Saugdüse auf. Während des Aufsuchens des Fadenendes auf der Spulenoberfläche muss diese Eintrittsöffnung abgedichtet werden. Das Zubringerorgan weist hierzu ein Deckelelement auf.From the DE 10 2015 112 660 A1 a textile machine with a workplace-specific suction nozzle, which is fixedly arranged at the workplace, has also become known. In order to still be able to deliver the thread end to a further handling element at the work station, the stationary suction nozzle is assigned a movable feed element. The feeder organ has a thread guide area which is already introduced into a suction channel of the suction nozzle before the thread end is sucked in, so that the thread end simultaneously enters the thread guide area of the feeder organ when it is sucked into the suction nozzle. After the thread end has been successfully picked up, the feeder element can be pivoted in order to deliver the thread end to the further handling element while forming a thread loop. The suction nozzle has an inlet opening for the thread guiding area of the feeder element and for leading the sucked thread out of the suction nozzle. During the search for the thread end on the bobbin surface, this inlet opening must be sealed. For this purpose, the feeder organ has a cover element.

Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung zum Ansetzen eines Fadens vorzuschlagen, welche während der Fadensuche eine zuverlässige Abdichtung der Eintrittsöffnung der Saugdüse ermöglicht.The object of the present invention is to propose a device for attaching a thread which enables a reliable sealing of the inlet opening of the suction nozzle during the thread search.

Die Aufgabe wird gelöst mit den Merkmalen der unabhängigen Ansprüche.The object is achieved with the features of the independent claims.

Eine Vorrichtung zum Ansetzen eines Fadens an einer Arbeitsstelle einer Textilmaschine weist eine Saugdüse zum Aufnehmen eines Fadenendes des Fadens von einer Spule auf, wobei die Saugdüse eine Ansaugmündung, einen Saugkanal sowie eine Eintrittsöffnung für den Faden aufweist. Weiterhin weist die Vorrichtung ein beweglich gegenüber der Saugdüse angeordnetes Zubringerorgan zum Bilden einer Fadenschlaufe aus dem von der Saugdüse aufgenommenen Fadenende auf, wobei das Zubringerorgan ein Deckelelement zum Verschließen der Eintrittsöffnung der Saugdüse sowie ein Fadenführungselement aufweist. Das Zubringerorgan ist zwischen einer ersten Stellung, in welcher das Fadenführungselement sich innerhalb des Saugkanals befindet und das Deckelelement die Eintrittsöffnung der Saugdüse verschließt, und einer zweiten Stellung, in welcher das Fadenführungselement sich außerhalb des Saugkanals befindet und das Deckelelement die Eintrittsöffnung der Saugdüse freigibt, hin und her bewegbar. Das Fadenführungselement weist eine offene Kontur auf.A device for attaching a thread to a work station of a textile machine has a suction nozzle for picking up a thread end of the thread from a bobbin, the suction nozzle having a suction port, a suction channel and an inlet opening for the thread. Furthermore, the device has a feeder element arranged movably opposite the suction nozzle for forming a thread loop from the thread end taken up by the suction nozzle, the feeder element having a cover element for closing the inlet opening of the suction nozzle and a thread guide element. The feeder element is between a first position in which the thread guide element is located inside the suction channel and the cover element closes the inlet opening of the suction nozzle, and a second position in which the thread guide element is located outside the suction channel and the cover element releases the inlet opening of the suction nozzle and moveable. The thread guide element has an open contour.

Dadurch, dass das Fadenführungselement eine offene Kontur aufweist und somit lediglich an einem der beiden Enden der offenen Kontur an dem Zubringerorgan bzw. an lediglich einer Stelle an dem Deckelelement des Zubringerorgans befestigt ist, erfährt das Deckelelement nur eine geringe Versteifung durch das Fadenführungselement. Dadurch wird die Flexibilität des Deckelelements erhöht, so dass dieses sich besser an die Oberfläche der Saugdüse im Bereich der Eintrittsöffnung anpassen kann. Insbesondere die Bereiche des Deckelelements, welche nicht mit dem Fadenführungselement in Verbindung stehen, können sich hierdurch besonders gut an die Kontur der Eintrittsöffnung anpassen und diese besser abdichten. Zugleich wird durch die offene Kontur des Fadenführungselements die Strömung innerhalb der Saugdüse weniger beeinträchtigt, was das sichere Einsaugen des Fadenendes unterstützt und zu einem verminderten Energieverbrauch führt. Zudem kann gegenüber einem Fadenführungselement mit einer geschlossenen Kontur insbesondere bei der Fertigung der Fadenführungselemente aus einem Blechmaterial eine Materialeinsparung erreicht werden.Because the thread guide element has an open contour and is therefore only attached to one of the two ends of the open contour on the feeder organ or at just one point on the cover element of the feeder organ, the cover element is only slightly stiffened by the thread guide element. This increases the flexibility of the cover element so that it can better adapt to the surface of the suction nozzle in the area of the inlet opening. In particular, the areas of the cover element which are not connected to the thread guide element can thereby adapt particularly well to the contour of the inlet opening and seal it off better. At the same time will Due to the open contour of the thread guide element, the flow inside the suction nozzle is less impaired, which supports the safe suction of the thread end and leads to reduced energy consumption. In addition, compared to a thread guide element with a closed contour, in particular when manufacturing the thread guide elements from a sheet metal material, a material saving can be achieved.

Nach einer vorteilhaften Ausführung der Erfindung besteht das Deckelelements aus einem Kunststoffmaterial. Durch die Verwendung eines Kunststoffmaterials kann das Deckelelement besonders flexibel ausgestaltet werden, so dass es sich auch besonders gut an die Kontur der Saugdüse anpassen kann und somit die Eintrittsöffnung besser abdichten kann. In jedem Falle ist es vorteilhaft, wenn die Saugdüse aus einem härteren Material besteht als das Deckelelement bzw. das Deckelelement aus einem weicheren Material besteht als die Saugdüse, so dass allein aufgrund des in der Saugdüse herrschenden Unterdrucks, welcher das weichere Deckelelement an die Saugdüse heranzieht, die Abdichtung verbessert werden kann.According to an advantageous embodiment of the invention, the cover element consists of a plastic material. By using a plastic material, the cover element can be designed to be particularly flexible, so that it can also adapt particularly well to the contour of the suction nozzle and thus better seal the inlet opening. In any case, it is advantageous if the suction nozzle is made of a harder material than the cover element or the cover element is made of a softer material than the suction nozzle, so that solely due to the negative pressure prevailing in the suction nozzle, which draws the softer cover element towards the suction nozzle sealing can be improved.

Zu einer verbesserten Abdichtung der Eintrittsöffnung trägt es weiterhin bei, wenn zumindest ein die Eintrittsöffnung umgebender Bereich der Saugdüse in Längsrichtung der Eintrittsöffnung gebogen ist und das Deckelelement ebenfalls in seiner Längsrichtung gebogen ist. Unter der Längsrichtung der Eintrittsöffnung wird dabei die Richtung der größten Abmessung der Eintrittsöffnung verstanden. Ebenso wird unter der Längsrichtung des Deckelelements die Richtung der größten Abmessung des Deckelelements verstanden. Durch die gebogene Kontur kann insbesondere im Bereich der beiden Längsenden des Deckelelements bzw. im Bereich der beiden Längsenden der Eintrittsöffnung die Abdichtung weiter verbessert werden.It also contributes to improved sealing of the inlet opening if at least one region of the suction nozzle surrounding the inlet opening is bent in the longitudinal direction of the inlet opening and the cover element is also bent in its longitudinal direction. The longitudinal direction of the inlet opening is understood to mean the direction of the largest dimension of the inlet opening. Likewise, the longitudinal direction of the cover element is understood to mean the direction of the largest dimension of the cover element. Due to the curved contour, the sealing can be further improved, in particular in the area of the two longitudinal ends of the cover element or in the area of the two longitudinal ends of the inlet opening.

Alternativ oder zusätzlich zu der gebogenen Kontur der Saugdüse und des Deckelelements ist es von Vorteil, wenn die Eintrittsöffnung der Saugdüse und das Deckelelement jeweils wenigstens eine, vorzugsweise jeweils wenigstens zwei einander gegenüberliegende, abgeschrägte Kante/-n aufweisen, welche jeweils eine Dichtfläche ausbilden. Hierdurch wird ein definierter Kontaktbereich zwischen der Saugdüse und dem Deckelelement geschaffen, welcher aufgrund der abgeschrägten Form die Abdichtung der Eintrittsöffnung unterstützt. Vorzugsweise sind dabei zumindest die beiden in Längsrichtung der Eintrittsöffnung verlaufenden Kanten der Eintrittsöffnung und des Deckelelements abgeschrägt, im Falle einer rechteckigen Eintrittsöffnung besonderes bevorzugt alle vier die Eintrittsöffnung begrenzenden Kanten. Denkbar ist es aber auch, je nach Form der Eintrittsmündung und des Deckelelements, lediglich eine, um die Eintrittsöffnung bzw. um das Deckelelement umlaufende, abgeschrägte Kante vorzusehen.As an alternative or in addition to the curved contour of the suction nozzle and the cover element, it is advantageous if the inlet opening of the suction nozzle and the cover element each have at least one, preferably at least one each have two mutually opposite, beveled edges, which each form a sealing surface. This creates a defined contact area between the suction nozzle and the cover element, which, due to the beveled shape, assists the sealing of the inlet opening. Preferably, at least the two edges of the inlet opening and the cover element running in the longitudinal direction of the inlet opening are beveled, in the case of a rectangular inlet opening particularly preferably all four edges delimiting the inlet opening. However, it is also conceivable, depending on the shape of the inlet opening and of the cover element, to provide only one beveled edge surrounding the inlet opening or around the cover element.

Nach einer weiteren Ausführungsform der Erfindung ist es vorteilhaft, wenn das Deckelelement auf seiner dem Fadenführungselement zugewandten Seite, also auf der in der ersten Stellung des Zubringerorgans zum Saugkanal der Saugdüse weisenden Seite, mit einer Dichtlippe versehen ist. Vorzugsweise ist die Dichtlippe aus einem flexiblen Kunststoffmaterial ausgeführt. Die Dichtlippe ermöglicht dabei in vorteilhafter Weise eine Abdichtung auch bei einem ungleichmäßigen Dichtspalt zwischen der Saugdüse und dem Deckelelement. Als flexibles Kunststoffmaterial kann beispielsweise ein Silikonmaterial oder ein elastomeres Material eingesetzt werden.According to a further embodiment of the invention, it is advantageous if the cover element is provided with a sealing lip on its side facing the thread guide element, ie on the side facing the suction channel of the suction nozzle in the first position of the feeder element. The sealing lip is preferably made from a flexible plastic material. The sealing lip advantageously enables sealing even in the case of an uneven sealing gap between the suction nozzle and the cover element. A silicone material or an elastomer material, for example, can be used as the flexible plastic material.

Zur Befestigung der Dichtlippe an dem Deckelelement ist es weiterhin vorteilhaft, wenn das Deckelelement auf seiner dem Fadenführungselement zugewandten Seite wenigstens ein Halteelement, vorzugsweise mehrere, voneinander beabstandete, Halteelemente, aufweist. Die Dichtlippe ist auf das Halteelement oder die Halteelemente lediglich aufgesteckt. Dadurch, dass die Dichtlippe lediglich lose aufgesteckt ist, wird diese während des Ansaugens des Fadenendes durch den Unterdruck in der Saugdüse ebenfalls leicht angesaugt, was zu einer verbesserten Dichtwirkung führt. Es wird somit eine selbstabdichtende Konstruktion des Deckelelements erreicht.For fastening the sealing lip to the cover element, it is furthermore advantageous if the cover element has at least one holding element, preferably several holding elements spaced apart from one another, on its side facing the thread guide element. The sealing lip is only pushed onto the holding element or the holding elements. Because the sealing lip is only loosely attached, it is also slightly sucked in during the suction of the thread end by the negative pressure in the suction nozzle, which leads to an improved sealing effect. A self-sealing construction of the cover element is thus achieved.

Um die Flexibilität des Deckelelements weiter zu verbessern, ist es vorteilhaft, wenn das Fadenführungselement bezogen auf die Längsrichtung des Deckelelements außermittig, insbesondere an oder im Bereich eines Längsendes des Deckelelements, an dem Deckelelement befestigt ist. Die Abdichtung in einem mittleren Bereich des Deckelelements zwischen den beiden Längsenden ist hierdurch insbesondere bei einem gebogenen Deckelelements und einer gebogenen Kontur der Saugdüse erleichtert.In order to further improve the flexibility of the cover element, it is advantageous if the thread guide element is attached to the cover element off-center with respect to the longitudinal direction of the cover element, in particular on or in the region of a longitudinal end of the cover element. The sealing in a central area of the cover element between the two longitudinal ends is hereby facilitated, in particular with a curved cover element and a curved contour of the suction nozzle.

Ebenfalls vorteilhaft ist es, wenn das Fadenführungselement aus einem Blechmaterial, insbesondere einem Edelstahlblech- oder einem Aluminiumblechmaterial, besteht. Das Fadenführungselement kann dabei in besonders einfache Weise durch Stanzen oder Lasern hergestellt werden.It is also advantageous if the thread guide element consists of a sheet metal material, in particular a stainless steel sheet material or an aluminum sheet material. The thread guide element can be produced in a particularly simple manner by punching or laser cutting.

Ebenso kann es von Vorteil sein, wenn das Faserführungselement ganz oder teilweise (d.h. ein oder mehrere Abschnitte des Faserführungselements) aus einem Keramikmaterial gefertigt ist. Beispielsweise wäre es denkbar, das Faserführungselement bzw. entsprechende Abschnitte desselben durch ein 3D-Druckverfahren herzustellen und anschließend durch Sintern mit einer Keramikschicht zu versehen.It can also be advantageous if the fiber guiding element is made entirely or partially (i.e. one or more sections of the fiber guiding element) from a ceramic material. For example, it would be conceivable to manufacture the fiber guiding element or corresponding sections thereof by a 3D printing process and then to provide them with a ceramic layer by sintering.

Weiterhin ist es vorteilhaft, wenn das Fadenführungselement mit einer Beschichtung versehen ist und/oder poliert ist. Beispielsweise kann ein Fadenführungselement aus einem Aluminiumblechmaterial mit einer Aluminiumoxidschicht versehen sein oder es kann ein Fadenführungselement aus einem Stahlblechmaterial mit einer DLC-Beschichtung (Diamond-like Carbon) versehen sein. In jedem Falle ist es vorteilhaft, wenn das Fadenführungselement mit einer reibwertmindernden Beschichtung versehen wird. Hierdurch können einerseits Beschädigungen des Fadens vermieden werden. Weiterhin kann durch reibungsmindernde, aber verschleißfeste Beschichtungen dem Verschleiß des Fadenführungselements entgegengewirkt werden. Vorteilhaft ist es daher auch, wenn das Fadenführungselement poliert ist. Auch hierdurch kann der Reibwert des Fadenführungselements und somit auch ein Verschleiß desselben vermindert werden.It is also advantageous if the thread guide element is provided with a coating and / or is polished. For example, a thread guide element made of sheet aluminum material can be provided with an aluminum oxide layer, or a thread guide element made of sheet steel material can be provided with a DLC (diamond-like carbon) coating. In any case, it is advantageous if the thread guide element is provided with a friction-reducing coating. In this way, on the one hand, damage to the thread can be avoided. Furthermore, wear of the thread guide element can be counteracted by friction-reducing, but wear-resistant coatings. It is therefore also advantageous if the thread guide element is polished is. This also makes it possible to reduce the coefficient of friction of the thread guide element and thus also wear thereof.

Zum Bilden der Fadenschlaufe ist es weiterhin vorteilhaft, wenn das Fadenführungselement wenigstens eine erste Fadenleitkante mit einer ersten Fixierkontur für ein abzuführendes Fadenstück und wenigstens eine zweite Fadenleitkante mit einer zweiten Fixierkontur für ein anzusetzendes Fadenstück aufweist. Beim Aufspannen der Fadenschlaufe kann dabei ein erstes Fadenstück an der ersten Fixierkontur fixiert werden, während ein zweites Fadenstück über die zweite Fadenleitkante gleitet und schließlich in der zweiten Fixierkontur festgehalten wird. Dadurch sind die beiden Fadenstücke der Fadenschlaufe voneinander getrennt und im Folgenden kann das anzusetzende Fadenstück wieder angesetzt werden.To form the thread loop, it is also advantageous if the thread guide element has at least one first thread guide edge with a first fixing contour for a piece of thread to be removed and at least one second thread guide edge with a second fixing contour for a piece of thread to be attached. When the thread loop is tensioned, a first piece of thread can be fixed to the first fixing contour, while a second piece of thread slides over the second thread guide edge and is finally held in the second fixing contour. As a result, the two thread pieces of the thread loop are separated from one another and the thread piece to be attached can then be attached again.

Weitere Vorteile der Erfindung werden anhand der nachfolgend dargestellten Ausführungsbeispiele beschrieben. Es zeigen:

Figur 1
eine schematische, teilweise geschnittene Seitenansicht einer Arbeitsstelle einer Textilmaschine während des regulären Betriebs,
Figur 2
die Arbeitsstelle der Figur 1 zwar nach einer Unterbrechung des regulären Betriebs, wobei ein Faden in eine Saugdüse eingesaugt wurde,
Figur 3
die Arbeitsstelle der Textilmaschine der Figur 1 während der Bildung einer Fadenschlaufe,
Figur 4
eine schematische Querschnittsdarstellung einer Vorrichtung zum Ansetzen eines Fadenendes nach einer ersten Ausführung,
Figur 5
eine schematische Querschnittsdarstellung einer Vorrichtung zum Ansetzen eines Fadenendes nach einer zweiten Ausführung,
Figur 6
eine Detailansicht eines Deckelelements mit einer Dichtlippe zum Abdichten einer Eintrittsöffnung der Saugdüse, sowie
Figur 7
eine schematische, abgebrochene Längsschnittdarstellung einer Vorrichtung zum Ansetzen eines Fadenendes nach einer weiteren, alternativen Ausführung.
Further advantages of the invention are described on the basis of the exemplary embodiments shown below. Show it:
Figure 1
a schematic, partially sectioned side view of a workstation of a textile machine during regular operation,
Figure 2
the place of work of Figure 1 after an interruption of regular operation, whereby a thread was sucked into a suction nozzle,
Figure 3
the workplace of the textile machine of Figure 1 during the formation of a thread loop,
Figure 4
a schematic cross-sectional representation of a device for attaching a thread end according to a first embodiment,
Figure 5
a schematic cross-sectional representation of a device for attaching a thread end according to a second embodiment,
Figure 6
a detailed view of a cover element with a sealing lip for sealing an inlet opening of the suction nozzle, and
Figure 7
a schematic, broken longitudinal sectional view of a device for attaching a thread end according to a further, alternative embodiment.

Bei der folgenden Beschreibung der Figuren und Ausführungsbeispiele werden für identische oder vergleichbare Merkmale in den verschiedenen Figuren jeweils gleiche Bezugszeichen verwendet. Die einzelnen Merkmale bzw. Bauteile werden daher lediglich bei ihrer ersten Erwähnung detailliert beschrieben. Soweit diese bei den folgenden Ausführungsbeispielen bzw. Figuren nicht nochmals gesondert erläutert werden, entspricht deren Ausgestaltung und Wirkweise der Ausgestaltung und Wirkweise der zuvor bereits anhand eines anderen Ausführungsbeispiels beschriebenen Merkmale.In the following description of the figures and exemplary embodiments, the same reference numerals are used for identical or comparable features in the various figures. The individual features or components are therefore only described in detail when they are first mentioned. Unless these are separately explained again in the following exemplary embodiments or figures, their design and mode of action correspond to the design and mode of action of the features already described above using another exemplary embodiment.

Figur 1 zeigt eine schematische Seitenansicht einer Arbeitsstelle 2 einer Textilmaschine 1 in einer Schnittdarstellung. Die Textilmaschine 1 ist vorliegend als Spinnmaschine ausgebildet und weist als Fadenliefervorrichtung 3 eine Spinnvorrichtung auf, in welcher ein Faden 4 produziert wird. Der Faden 4 wird mittels zweier Abzugswalzen 5 aus der Fadenliefervorrichtung 3 abgezogen und einer Spulvorrichtung 6 zugeführt, wo er auf eine Spule 7 aufgewickelt wird. Abweichend von der gezeigten Darstellung wäre es auch möglich, dass die Textilmaschine 1 nicht als Spinnmaschine, sondern als Spulmaschine ausgebildet ist. In diesem Fall weist die Arbeitsstelle 2 als Fadenliefervorrichtung 3 eine Ablaufspule auf, von welcher der Faden 4 wiederum abgezogen und auf eine Spule 7 wie zuvor beschrieben aufgewickelt wird. Figure 1 shows a schematic side view of a work station 2 of a textile machine 1 in a sectional view. In the present case, the textile machine 1 is designed as a spinning machine and, as the thread delivery device 3, has a spinning device in which a thread 4 is produced. The thread 4 is drawn off from the thread feed device 3 by means of two take-off rollers 5 and fed to a winding device 6, where it is wound onto a bobbin 7. In a departure from the illustration shown, it would also be possible for the textile machine 1 not to be designed as a spinning machine, but rather as a winding machine. In this case, the work station 2 has, as the thread delivery device 3, an unwinding bobbin, from which the thread 4 is again drawn off and wound onto a bobbin 7 as described above.

Die Arbeitsstelle 2 der vorliegend gezeigten Textilmaschine 1 ist weiterhin als autarke Arbeitsstelle 2 ausgebildet, welche nach einer Unterbrechung der Produktion in der Lage ist, ein Fadenende 4a (siehe Figur 2) selbstständig wieder anzusetzen. Hierzu wird das Fadenende 4a wieder in die Spinnvorrichtung zurückgeliefert, wo dieses mit weiteren, in den Faden einzubindenden Fasern wieder verbunden wird. Im Falle einer Spulmaschine wird ein von der Spule 7 kommendes Fadenende 4a mit einem hier nicht gezeigten Fadenende der Ablaufspule verbunden. Die vorliegend gezeigte Arbeitsstelle 2 ist hierzu mit einer Vorrichtung 16 zum Ansetzen eines Fadens 4 versehen. Die Vorrichtung 16 zum Ansetzen des Fadens 4 weist dabei eine Saugdüse 8 auf, mittels welcher ein auf die Spule 7 aufgelaufenes Fadenende 4a (siehe Figur 2) des Fadens 4 gesucht und in einen Saugkanal 9 der Saugdüse 8 eingesaugt werden kann. Um den Saugkanal 9 mit Unterdruck zu beaufschlagen, ist die Saugdüse 8 in an sich bekannter Weise mit einem Unterdruckkanal 10 verbunden. Zum Einsaugen des Fadenendes 4a weist die Saugdüse 8 eine Ansaugmündung 11 auf. Weiterhin beinhaltet die Vorrichtung 16 ein Zubringerorgan 13, mittels welchem das von der Saugdüse aufgenommene Fadenende 4a unter Bildung einer Fadenschlaufe (siehe Figur 3) einem Ansetzorgan 17 oder einem anderen Handlingsorgan der Arbeitsstelle 2 zugestellt werden kann oder auch direkt der Fadenliefervorrichtung 3 zugeführt werden kann. Das Zubringerorgan 13 weist hierzu einen beweglich, insbesondere schwenkbeweglich, gelagerten Hebel 24 auf, welcher mit einem Fadenführungselement 15 versehen ist, in welchem das Fadenende 4a von der Saugdüse 8 aufgenommen werden kann. Die Bewegung des Zubringerorgans 13 ist vorliegend durch den Pfeil und die gestrichelte, zweite Darstellung des Zubringerorgans 13 symbolisiert.The work station 2 of the textile machine 1 shown here is also designed as an autonomous work station 2 which, after an interruption in production, is able to insert a thread end 4a (see FIG Figure 2 ) to start again independently. For this purpose, the thread end 4a is returned to the spinning device, where it is reconnected with other fibers to be tied into the thread. In the case of a winding machine, a thread end 4a coming from the bobbin 7 is connected to a thread end of the pay-off bobbin, not shown here. For this purpose, the work station 2 shown here is provided with a device 16 for attaching a thread 4. The device 16 for attaching the thread 4 has a suction nozzle 8, by means of which a thread end 4a that has run onto the bobbin 7 (see FIG Figure 2 ) of the thread 4 is sought and can be sucked into a suction channel 9 of the suction nozzle 8. In order to apply negative pressure to the suction channel 9, the suction nozzle 8 is connected to a negative pressure channel 10 in a manner known per se. To suck in the thread end 4a, the suction nozzle 8 has a suction opening 11. The device 16 also contains a feeder element 13, by means of which the thread end 4a picked up by the suction nozzle, forming a thread loop (see FIG Figure 3 ) can be delivered to an attachment element 17 or another handling element of the work station 2 or can also be fed directly to the thread delivery device 3. For this purpose, the feeder member 13 has a movably, in particular pivotably, mounted lever 24 which is provided with a thread guide element 15 in which the thread end 4a can be received by the suction nozzle 8. The movement of the feeder organ 13 is symbolized in the present case by the arrow and the dashed, second representation of the feeder organ 13.

Die Saugdüse ist gemäß vorliegender Darstellung feststehend an der Arbeitsstelle 2 angeordnet, wobei der Faden 4 während des regulären Betriebs der Arbeitsstelle 2 durch die Saugdüse 8 hindurch verläuft. Der Faden 4 tritt dabei durch eine Eintrittsöffnung 12 in die Saugdüse 8 ein und verlässt diese durch die Ansaugmündung 11. Zum Verschließen der Eintrittsöffnung 12 der Saugdüse 8 weist das Zubringerorgan 13 ein Deckelelement 14 auf. Das Zubringerorgan 13 ist zwischen einer ersten Stellung I (siehe Figur 2) zum Übernehmen des Fadenendes 4a von der Saugdüse 8 und einer zweiten Stellung II zum Bilden der Fadenschlaufe und zum Übergeben des Fadenendes 4a verfahrbar. In der vorliegend gezeigten zweiten Stellung II des Zubringerorgans 13 befindet sich das Fadenführungselement 15 außerhalb des Saugkanals 9 der Saugdüse 8 und das Deckelelement 14 gibt die Eintrittsöffnung 12 der Saugdüse 8 frei, so dass der Faden 4 während der Produktion durch die Saugdüse 8 verlaufen kann.According to the present illustration, the suction nozzle is arranged in a stationary manner at the work station 2, the thread 4 running through the suction nozzle 8 during regular operation of the work station 2. The thread 4 enters the suction nozzle 8 through an inlet opening 12 and leaves it through the suction opening 11. To close the inlet opening 12 of the Suction nozzle 8, the feeder element 13 has a cover element 14. The feeder element 13 is between a first position I (see Figure 2 ) for taking over the thread end 4a from the suction nozzle 8 and a second position II for forming the thread loop and for transferring the thread end 4a. In the second position II of the feeder member 13 shown here, the thread guide element 15 is located outside the suction channel 9 of the suction nozzle 8 and the cover element 14 releases the inlet opening 12 of the suction nozzle 8 so that the thread 4 can run through the suction nozzle 8 during production.

Kommt es nun zu einer Unterbrechung der Produktion, beispielsweise durch einen Fadenbruch oder einen Reinigerschnitt, so entsteht ein Fadenende 4a (siehe Figur 2), welches aufgrund der sich noch drehenden Spule 7 auf die Spule 7 auf läuft. Es ist somit erforderlich, mittels der Saugdüse 8 das auf die Spule 7 aufgelaufene Fadenende 4a aufzusuchen und in diese einzusaugen.If there is an interruption in production, for example due to a thread break or a cleaner cut, a thread end 4a is created (see Figure 2 ), which runs on the spool 7 due to the spool 7 still rotating. It is therefore necessary, by means of the suction nozzle 8, to seek out the thread end 4a that has accumulated on the bobbin 7 and to suck it into it.

Figur 2 zeigt nun die Arbeitsstelle 2 der Textilmaschine 1 in einer Situation, in welcher nach einer Unterbrechung der Produktion das Fadenende 4a gerade in die Saugdüse 8 eingesaugt wurde. Zum Aufsuchen des Fadenendes 4a auf der Spule 7 wird dabei zunächst das Zubringerorgan 13 in seine erste Stellung I bewegt, vorliegend verschwenkt. In dieser Stellung I befindet sich das Fadenführungselement 15 innerhalb des Saugkanals 9 der Saugdüse 8 und das Deckelelement 14 verschließt die Eintrittsöffnung 12 der Saugdüse 8. Die Saugdüse 8 kann nun über den Unterdruckkanal 10 mit Unterdruck beaufschlagt werden und das Fadenende 4a auf der Oberfläche der Spule 7 aufsuchen. Durch das Einsaugen des Fadenendes 4a gelangt dieses nicht nur in den Saugkanal 9 der Saugdüse 8, sondern zugleich auch in das Fadenführungselement 15 des Zubringerorgans 13. Das Fadenende 4a ist nun durch den Saugzug innerhalb der Saugdüse 8 gehalten. Um die Wirkung des Unterdrucks in der Saugdüse 8 nicht zu beeinträchtigen und zudem den Energieverbrauch der Textilmaschine 1 zu reduzieren, ist es erforderlich, die Eintrittsöffnung 12 während des Beaufschlagens der Saugdüse 8 mit Unterdruck mittels des Deckelelements 14 zuverlässig abzudichten. Figure 2 now shows the work station 2 of the textile machine 1 in a situation in which the thread end 4a has just been sucked into the suction nozzle 8 after an interruption in production. To find the thread end 4a on the bobbin 7, the feeder element 13 is first moved into its first position I, in the present case pivoted. In this position I, the thread guide element 15 is located within the suction channel 9 of the suction nozzle 8 and the cover element 14 closes the inlet opening 12 of the suction nozzle 8. The suction nozzle 8 can now be subjected to negative pressure via the negative pressure channel 10 and the thread end 4a on the surface of the bobbin 7 visit. By sucking in the thread end 4a, it not only gets into the suction channel 9 of the suction nozzle 8, but also into the thread guide element 15 of the feeder element 13. The thread end 4a is now held inside the suction nozzle 8 by the suction. In order not to impair the effect of the negative pressure in the suction nozzle 8 and also to reduce the energy consumption of the textile machine 1, it is necessary to use the To reliably seal the inlet opening 12 by means of the cover element 14 while the suction nozzle 8 is subjected to negative pressure.

Figur 3 zeigt schließlich eine weitere Situation der Arbeitsstelle 2 der Textilmaschine 1, in welcher das eingesaugte Fadenende 4a unter Bildung einer Fadenschlaufe vorliegend dem Ansetzorgan 17 zugestellt wird. Das Zubringerorgan 13 wird hierzu aus seiner ersten Stellung I (siehe Figur 2) wieder zurück in seine zweite Stellung II bewegt, in welcher das Deckelelement 14 die Eintrittsöffnung 12 freigibt und das Fadenführungselement 15 sich außerhalb des Saugkanals 9 befindet. Durch das Aufziehen der Fadenschlaufe sind nun aus dem ursprünglichen Fadenende 4a ein anzusetzendes Fadenstück 4b und ein abzuführendes Fadenstück 4c ausgebildet worden. Die beiden Fadenstücke 4b und 4c können nun beispielsweise durch das Ansetzorgan 17 aufgetrennt werden, so dass das Fadenstück 4b der Fadenliefervorrichtung 3 zum Ansetzen zugeführt werden kann und das Fadenstück 4c in den Unterdruckkanal eingesaugt und über diesen entsorgt werden kann. Figure 3 Finally, FIG. 3 shows a further situation of the work station 2 of the textile machine 1, in which the sucked-in thread end 4a is in the present case fed to the attachment member 17 with the formation of a thread loop. The feeder element 13 is moved from its first position I (see FIG Figure 2 ) moves back into its second position II, in which the cover element 14 releases the inlet opening 12 and the thread guide element 15 is located outside of the suction channel 9. By pulling the thread loop, a thread piece 4b to be attached and a thread piece 4c to be removed have now been formed from the original thread end 4a. The two pieces of thread 4b and 4c can now be separated, for example by the attachment member 17, so that the piece of thread 4b can be fed to the thread delivery device 3 for attachment and the piece of thread 4c can be sucked into the vacuum channel and disposed of via it.

Um nun die Abdichtung der Eintrittsöffnung 12 durch das Deckelelement 14 während des Einsaugens des Fadenendes 4a zu erleichtern, ist das Fadenführungselement 15 nicht mehr wie bisher als geschlossene Kontur in Form einer Öse, sondern als offene Kontur ausgeführt. Dies ist in Figur 4 dargestellt, welche die Vorrichtung 16 mit der Saugdüse 8 mit dem Saugkanal 9 sowie dem Zubringerorgan 13 in einer schematischen Querschnittsdarstellung zeigt. Das Zubringerorgan 13 ist vorliegend in seiner ersten Stellung I dargestellt, in welcher das Deckelelement 14 die Eintrittsöffnung 12 der Saugdüse 8 verschließt und das Fadenführungselement 15 sich in dem Saugkanal 9 befindet. Das Fadenführungselement 15 ist dabei bezogen auf die Längsrichtung des Deckelelements 14 außermittig angeordnet. Vorliegend ist das Fadenführungselement 15 im Bereich eines Längsendes 14a des Deckelelements 14 angeordnet. Das Deckelelement 14 kann sich hierdurch insbesondere an dem anderen, dem ersten Längsende 14a, an welchem das Fadenführungselement 15 angeordnet ist, gegenüberliegenden Längsende 14a flexibel an die Eintrittsöffnung 12 anpassen.In order to facilitate the sealing of the inlet opening 12 by the cover element 14 while the thread end 4a is sucked in, the thread guide element 15 is no longer designed as a closed contour in the form of an eyelet, but as an open contour. This is in Figure 4 shown, which shows the device 16 with the suction nozzle 8 with the suction channel 9 and the feeder element 13 in a schematic cross-sectional view. The feeder element 13 is shown in its first position I in which the cover element 14 closes the inlet opening 12 of the suction nozzle 8 and the thread guide element 15 is located in the suction channel 9. The thread guide element 15 is arranged eccentrically with respect to the longitudinal direction of the cover element 14. In the present case, the thread guide element 15 is arranged in the region of a longitudinal end 14a of the cover element 14. The cover element 14 can thereby in particular at the other, the first longitudinal end 14a, at which the thread guide element 15 is arranged, flexibly adapt the opposite longitudinal end 14a to the inlet opening 12.

Aufgrund dessen, dass innerhalb des Saugkanals 9 zumindest während des Fadensuchens Unterdruck herrscht, kann dabei auch erreicht werden, dass das freie Längsende 14a durch den Unterdruck noch an die Eintrittsöffnung 12 der Saugdüse 8 angesaugt wird, was die Dichtwirkung des Deckelelements 14 unterstützt. Weiterhin ist der Figur 4 eine erste Fadenleitkante 20 zu entnehmen, an welcher beim Aufspannen der Fadenschlaufe (siehe Figur 3) das abzuführende Fadenstück 4c entlang gleitet, bis es schließlich an einer ersten Fixierkontur 21 fixiert wird. Ebenso gleitet das anzusetzende Fadenstück 4b während des weiteren Aufspannens der Fadenschlaufe an einer zweiten Fadenleitkante 22 entlang, bis es schließlich an einer zweiten Fixierkontur 23 fixiert wird. Nach dem vollständigen Aufspannen der Fadenschlaufe sind somit das anzusetzende Fadenstück 4b und das abzuführende Fadenstück 4c durch das Fadenführungselement 15 voneinander separiert können somit getrennt werden, wie zuvor bereits beschriebenen.Due to the fact that there is negative pressure inside the suction channel 9 at least during the thread search, it can also be achieved that the free longitudinal end 14a is still sucked into the inlet opening 12 of the suction nozzle 8 by the negative pressure, which supports the sealing effect of the cover element 14. Furthermore, the Figure 4 a first thread guide edge 20 can be found on which, when the thread loop is opened (see Figure 3 ) the piece of thread 4c to be discharged slides along until it is finally fixed to a first fixing contour 21. Likewise, the thread piece 4b to be attached slides along a second thread guide edge 22 during the further tensioning of the thread loop until it is finally fixed to a second fixing contour 23. After the thread loop has been completely tensioned, the thread piece 4b to be attached and the thread piece 4c to be removed can thus be separated from one another by the thread guide element 15, as already described above.

Figur 5 zeigt eine andere Ausführung einer Vorrichtung 16 zum Ansetzen eines Fadenendes 4a, bei welchem das Deckelelement 14 in seiner Längsrichtung gebogen ist. Ebenso ist bei der Saugdüse 8 zumindest der die Eintrittsöffnung 12 umgebende Bereich der Saugdüse 8 in seiner Längsrichtung gebogen. Die Längsrichtung entspricht dabei der größten Abmessung der schlitzförmigen Eintrittsöffnung 12. Die Abdichtung der Eintrittsöffnung 12 durch das Deckelelement 14 wird hierdurch erleichtert. Weiterhin ist in Figur 5 noch eine Dichtlippe 18 gezeigt, welche auf dem Deckelelement 14 angebracht ist und die Abdichtung der Eintrittsöffnung 12 ebenfalls erleichtert. Insbesondere, wenn das Deckelelement 14 sowie die Dichtlippe 18 aus einem Kunststoffmaterial hergestellt werden, sind diese besonders nachgiebig, so dass allein durch das Ansaugen des Deckelelements 14 mit der Dichtlippe 18 durch den Unterdruck eine verbesserte Abdichtung erzielt werden kann. Ein erhöhter Anpressdruck auf das Deckelelement 14 bspw. durch einen Antrieb des Zubringerorgans 13 ist dabei nicht erforderlich. Die Dichtlippe 18 ist dabei auf der dem Fadenführungselement 15 zugewandten Seite des Deckelelements 14 und somit auf der Innenseite des Deckelelements 14 angeordnet und steht mit dem Saugkanal 9 und somit auch mit dem darin herrschenden Unterdruck während des Ansaugens in Verbindung. Demgegenüber weist die dem Fadenführungselement 15 abgewandte Seite des Deckelelements 14 zur Außenseite der Saugdüse 8. Figure 5 shows another embodiment of a device 16 for attaching a thread end 4a, in which the cover element 14 is bent in its longitudinal direction. Likewise, in the case of the suction nozzle 8, at least the region of the suction nozzle 8 surrounding the inlet opening 12 is curved in its longitudinal direction. The longitudinal direction corresponds to the largest dimension of the slot-shaped inlet opening 12. The sealing of the inlet opening 12 by the cover element 14 is hereby facilitated. Furthermore, in Figure 5 a sealing lip 18 is also shown, which is attached to the cover element 14 and also facilitates the sealing of the inlet opening 12. In particular, if the cover element 14 and the sealing lip 18 are made of a plastic material, they are particularly flexible, so that an improved seal can be achieved simply by sucking in the cover element 14 with the sealing lip 18 through the negative pressure. An increased contact pressure on the cover element 14, for example by a drive the feeder organ 13 is not required. The sealing lip 18 is arranged on the side of the cover element 14 facing the thread guide element 15 and thus on the inside of the cover element 14 and is in connection with the suction channel 9 and thus also with the negative pressure prevailing therein during suction. In contrast, the side of the cover element 14 facing away from the thread guide element 15 faces the outside of the suction nozzle 8.

Um die Dichtlippe 18 auf dem Deckelelement 14 befestigen zu können, weist das Deckelelement 14 vorliegend mehrere Halteelemente 19 auf, auf welche die Dichtlippe 18 aufgesteckt ist. Die Halteelemente 19 sind dabei voneinander beabstandet, so dass die Dichtlippe 18 nicht vollflächig mit dem Deckelelement 14 verbunden ist. Die Dichtlippe 18 kann sich somit gegenüber dem Deckelelement 14 bewegen, was das Ansaugen der Dichtlippe 18 durch den innerhalb des Saugkanals 9 herrschenden Unterdruck erleichtert.In order to be able to fasten the sealing lip 18 on the cover element 14, the cover element 14 in the present case has a plurality of holding elements 19 onto which the sealing lip 18 is slipped. The holding elements 19 are at a distance from one another, so that the sealing lip 18 is not connected to the cover element 14 over the entire surface. The sealing lip 18 can thus move with respect to the cover element 14, which facilitates the suction of the sealing lip 18 due to the negative pressure prevailing inside the suction channel 9.

Figur 6 zeigt eine Draufsicht auf die Innenseite bzw. die dem Fadenführungselement 15 zugewandte Seite des Deckelelements 14, auf welche die Dichtlippe 18 aufgebracht ist. Die Halteelemente 19 sind nach der vorliegenden Darstellung in zwei Reihen, vorliegend oberhalb und unterhalb des Fadenführungselements 15 angeordnet. Denkbar wäre es aber auch, lediglich eine Reihe von Halteelementen 19 vorzusehen, welche dann, bezogen auf die Darstellung der Figur 6, links und rechts des Fadenführungselements 15 angeordnet wären. Weiterhin wäre es natürlich auch denkbar, insgesamt lediglich 2 oder 3 Halteelemente an verschiedenen Stellen des Deckelelements 14 vorzusehen. Figure 6 shows a plan view of the inside or the side of the cover element 14 facing the thread guide element 15, to which the sealing lip 18 is applied. According to the present illustration, the holding elements 19 are arranged in two rows, in the present case above and below the thread guide element 15. However, it would also be conceivable to provide only a number of holding elements 19, which then, based on the illustration of Figure 6 , left and right of the thread guide element 15 would be arranged. Furthermore, it would of course also be conceivable to provide a total of only 2 or 3 holding elements at different points on the cover element 14.

Figur 7 zeigt eine schematische, abgebrochene Längsschnittdarstellung einer Vorrichtung 16 zum Ansetzen eines Fadenendes 4a nach einer weiteren, alternativen Ausführung. Dabei weist die Eintrittsöffnung 12 der Saugdüse 8 vorliegend zwei einander gegenüberliegende, in Längsrichtung der Eintrittsöffnung 12 verlaufende, abgeschrägte Kanten auf. Diese bilden jeweils eine Dichtfläche 25 für das Deckelelement 14 aus. Ebenso sind bei dem Deckelelement 14 die beiden in Längsrichtung der Eintrittsöffnung 12 verlaufenden Kanten abgeschrägt und bilden Dichtflächen 25 aus. Vorzugsweise werden alle die Eintrittsöffnung 12 begrenzenden Kanten bzw. alle Kanten des Deckelelements 14 abgeschrägt oder mit einer umlaufenden, abgeschrägten Kante versehen, um eine besonders gute Abdichtung zu erzielen. Es versteht sich, dass die Kanten des Deckelelements 14 jeweils korrespondierend zu den Kanten der Eintrittsöffnung 12 abgeschrägt werden, so dass die Eintrittsöffnung 12 als Positivform und das Deckelement 14 entsprechend als Negativform ausgeführt sind. Figure 7 shows a schematic, broken longitudinal section view of a device 16 for attaching a thread end 4a according to a further, alternative embodiment. In this case, the inlet opening 12 of the suction nozzle 8 in the present case has two beveled edges lying opposite one another and running in the longitudinal direction of the inlet opening 12. These each form one Sealing surface 25 for the cover element 14. In the case of the cover element 14, the two edges running in the longitudinal direction of the inlet opening 12 are also beveled and form sealing surfaces 25. Preferably, all edges delimiting the inlet opening 12 or all edges of the cover element 14 are beveled or provided with a circumferential, beveled edge in order to achieve a particularly good seal. It goes without saying that the edges of the cover element 14 are beveled in each case corresponding to the edges of the inlet opening 12, so that the inlet opening 12 is designed as a positive shape and the cover element 14 is designed as a negative shape.

Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt. Abwandlungen und Kombinationen im Rahmen der Patentansprüche fallen ebenfalls unter die Erfindung, auch wenn diese in den Ausführungsbeispielen nicht dargestellt sind oder deren einzelne Merkmale in verschiedenen Ausführungsbeispielen dargestellt sind.The invention is not restricted to the exemplary embodiments shown. Modifications and combinations within the scope of the patent claims also fall under the invention, even if these are not shown in the exemplary embodiments or their individual features are shown in different exemplary embodiments.

BezugszeichenlisteList of reference symbols

11
TextilmaschineTextile machine
22
Arbeitsstelleplace of work
33
FadenliefervorrichtungYarn feeding device
44th
Fadenthread
4a4a
FadenendeThread end
4b4b
anzusetzendes Fadenstückpiece of thread to be attached
4c4c
abzuführendes Fadenstückpiece of thread to be discharged
55
AbzugsvorrichtungTrigger device
66
SpulvorrichtungWinding device
77th
SpuleKitchen sink
88th
SaugdüseSuction nozzle
99
SaugkanalSuction channel
1010
UnterdruckkanalVacuum duct
1111
AnsaugmündungIntake port
1212
EintrittsöffnungInlet opening
1313
ZubringerorganFeeder organ
1414th
DeckelelementCover element
14a14a
Längsende des DeckelelementsLongitudinal end of the cover element
1515th
FadenführungselementThread guide element
1616
Vorrichtung zum Ansetzen des FadensDevice for attaching the thread
1717th
AnsetzorganAttachment organ
1818th
DichtlippeSealing lip
1919th
HalteelementRetaining element
2020th
erste Fadenleitkantefirst thread guide edge
2121st
erste Fixierkonturfirst fixation contour
2222nd
zweite Fadenleitkantesecond thread guide edge
2323
zweite Fixierkontursecond fixation contour
2424
Hebellever
2525th
DichtflächeSealing surface
II.
erste Stellung des Zubringerorgansfirst position of the feeder organ
IIII
zweite Stellung des Zubringerorganssecond position of the feeder organ

Claims (11)

  1. A device (16) for piecing a thread (4) at a workstation (2) of a textile machine (1), comprising a suction nozzle (8) for picking up a thread end (4a) of the thread (4) from a bobbin (7), wherein the suction nozzle (8) includes an extraction mouth (11), a suction channel (9) as well as an entry opening (12) for the thread (4), and comprising a feeder unit (13) for forming a thread loop from the thread end (4a) picked up by the suction nozzle (8) situated so as to be movable with respect to the suction nozzle (8), wherein the feeder unit (13) comprises a cover element (14) for closing the entry opening (12) of the suction nozzle (8), as well as a thread-guiding element (15), and wherein the feeder unit (13) can be moved back and forth between a first position (I), in which the cover element (14) closes the entry opening (12) of the suction nozzle (8), and a second position (II), in which the cover element (14) unblocks the entry opening (12) of the suction nozzle (8), wherein the thread guiding element (15) is situated inside the suction channel in the first position and outside the suction channel in the second position characterized in that the thread-guiding element (15) has an open contour.
  2. The device as claimed in the preceding claim, characterized in that the cover element (14) consists of a plastic material.
  3. The device as claimed in one of the preceding claims, characterized in that at least one area of the suction nozzle (8) surrounding the entry opening (12) is curved in the longitudinal direction of the entry opening (12) and the cover element (14) is also curved in its longitudinal direction.
  4. The device as claimed in one of the preceding claims, characterized in that the entry opening (12) of the suction nozzle (8) and the cover element (14) each include at least one, preferably at least two opposed, beveled edges, each of which forms a sealing surface (25).
  5. The device as claimed in one of the preceding claims, characterized in that the cover element (14) is provided with a sealing lip (18) on its side facing the thread-guiding element (15), wherein the sealing lip (18) is preferably made from a flexible plastic material.
  6. The device as claimed in the preceding claim, characterized in that the cover element (14) comprises, on its side facing the thread-guiding element (15), at least one holding element (19), preferably several mutually spaced holding elements (19), onto which the sealing lip (18) is fitted.
  7. The device as claimed in one of the preceding claims, characterized in that the thread-guiding element (15) is attached to the cover element (14) off-center, relative to the longitudinal direction of the cover element (14), in particular on or in the area of one longitudinal end (14a) of the cover element (14).
  8. The device as claimed in one of the preceding claims, characterized in that the thread-guiding element (15) is made from a sheet-metal material, in particular, a stainless steel or aluminum sheet-metal material.
  9. The device as claimed in one of the preceding claims, characterized in that the thread-guiding element (15) consists of a ceramic material, at least in sections.
  10. The device as claimed in one of the preceding claims, characterized in that the thread-guiding element (15) is provided with a coating and/or is polished.
  11. The device as claimed in one of the preceding claims, characterized in that the thread-guiding element (15) comprises at least one first thread guide edge (20) having a first fixing contour (21) for a thread piece (4c) to be carried away and at least one second thread guide edge (22) having a second fixing contour (23) for a thread piece (4b) to be pieced.
EP18198069.9A 2017-10-02 2018-10-02 Device for positioning a thread at a workstation of a textile machine comprising a suction nozzle and a feeding element Active EP3461775B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017122851.9A DE102017122851A1 (en) 2017-10-02 2017-10-02 Device for applying a thread to a workstation of a textile machine with a suction nozzle and with a feeder element

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EP3461775A1 EP3461775A1 (en) 2019-04-03
EP3461775B1 true EP3461775B1 (en) 2020-08-19

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EP (1) EP3461775B1 (en)
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Publication number Publication date
CN109179084A (en) 2019-01-11
CN109179084B (en) 2021-11-02
US20190100861A1 (en) 2019-04-04
US10767286B2 (en) 2020-09-08
DE102017122851A1 (en) 2019-04-04
EP3461775A1 (en) 2019-04-03

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