EP3546406B1 - Procédé de formation d'une boucle de fil et de séparation d'une section de fil à utiliser et d'une section de fil à évacuer et unité de rouleaux presseurs - Google Patents

Procédé de formation d'une boucle de fil et de séparation d'une section de fil à utiliser et d'une section de fil à évacuer et unité de rouleaux presseurs Download PDF

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Publication number
EP3546406B1
EP3546406B1 EP19161901.4A EP19161901A EP3546406B1 EP 3546406 B1 EP3546406 B1 EP 3546406B1 EP 19161901 A EP19161901 A EP 19161901A EP 3546406 B1 EP3546406 B1 EP 3546406B1
Authority
EP
European Patent Office
Prior art keywords
thread
piece
pressure roller
loop
workstation
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
EP19161901.4A
Other languages
German (de)
English (en)
Other versions
EP3546406A1 (fr
Inventor
Bernd Bahlmann
Mario Maleck
Harald Widner
Frank Baier
Thomas Gruber
Robert Hagl
Robin Wein
Andreas HOYER
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 EP3546406A1 publication Critical patent/EP3546406A1/fr
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Publication of EP3546406B1 publication Critical patent/EP3546406B1/fr
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/86—Arrangements for taking-up waste material before or after winding or depositing
    • B65H54/88—Arrangements for taking-up waste material before or after winding or depositing by means of pneumatic arrangements, e.g. suction guns
    • 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
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a method for forming a thread loop and for separating a piece of thread to be attached and a piece of thread to be removed from the thread loop at a work station of a textile machine, in which a thread is taken up from a bobbin, the thread loop is formed from the thread and in which by means of at least the piece of thread to be attached and the piece of thread to be removed are separated from one another by an on-site thread guide device. Furthermore, the invention relates to a pressure roller unit for a take-off device of a work station of a textile machine with a cylindrical pressure roller mounted rotatably on an axis of rotation.
  • a thread end that has accumulated on a spool After an interruption in production can be caused, for example, by a thread breakage or a clearer cut.
  • an interruption in production can be caused, for example, by a thread breakage or a clearer cut.
  • the end of the thread is located on the surface of the spool and sucked in by means of a suction nozzle. Then, as a rule, the thread stretched between the suction nozzle and the bobbin is grasped by means of a feeder element and a thread loop is formed from this in order to present the thread to further handling elements of the work station.
  • the loop is severed by other handling elements at the work site, so that a new thread end is created, which can then be fed to the piecing process.
  • the thereby severed thread end is, however, sucked off by means of the suction nozzle and the disposed of.
  • the thread loop thus contains a piece of thread to be attached and a piece of thread to be removed, which must be separated from one another while the thread loop is being formed in order to be able to handle them separately from one another and to be able to deliver them to further handling organs.
  • Thread guide devices are used to separate the two pieces of thread.
  • the DE 101 39 075 A1 a textile machine in which handling elements for attaching the thread are arranged at each individual work station.
  • the yarn is picked up by a swiveling suction nozzle belonging to the spinning station and, while the suction nozzle is swiveled down, is guided along a yarn guide device arranged at the spinning station until it slips into a yarn catching contour of the yarn guide device.
  • the suction nozzle swivels upwards again, so that a thread loop is now formed with a thread end to be attached and a thread end to be removed.
  • the end of the thread to be attached can now be grasped by means of a further handling element belonging to the work station and fed to the attachment.
  • the thread end to be attached is guided through the thread guide device and a thread guide edge at the suction opening of the suction nozzle approximately in the middle of the work area. Since the thread loop is formed and the two pieces of thread are separated by the pivoting movement of the suction nozzle, this arrangement cannot be used for suction nozzles that are fixed at the work site. Furthermore, it often proves to be difficult to separate the two pieces of thread from each other and to insert the piece of thread to be attached back into the working organs of the job.
  • the EP 3 135 618 A2 discloses a method of forming a thread loop according to the preamble of claim 1 and a pressure roller unit according to the preamble of claim 7.
  • the object of the present invention is therefore to propose a method by means of which the piece of thread to be attached and the piece of thread to be removed can be safely separated from one another and the piece of thread to be attached can be safely inserted into the working elements of the work station can be. Furthermore, a corresponding pressure roller unit is to be proposed.
  • a thread is picked up from a bobbin by means of a suction nozzle, the thread loop is formed from the thread and the piece of thread to be attached is removed by means of at least one thread guide device belonging to the work station and separates the piece of thread to be discharged from one another.
  • the thread is preferably taken over by the suction nozzle by means of a feeder element which is arranged so that it can move relative to the suction nozzle.
  • At least one of the thread pieces, in particular the thread piece to be attached is guided over at least one thread guide device arranged on a pressure roller unit of the work site during formation of the thread loop.
  • the thread guide device is arranged directly on the pressure roller unit of the work station.
  • a pressure roller unit for a take-off device of a work station of a textile machine is proposed with a cylindrical pressure roller mounted rotatably on a rotary axis.
  • the pressure roller unit is provided with at least one thread guide device, in particular a thread guide plate, for separating a piece of thread to be attached and a piece of thread to be removed from a thread loop.
  • a thread guide device in particular a thread guide plate
  • the pressure roller can be lifted off the take-off roller or placed against it in order to enable the insertion of the piece of thread to be attached or, in the state pressed against the take-off roller, the take-off of the subsequently new to allow produced thread. Because a thread guide device is now arranged directly on the pressure roller unit, the piece of thread can be guided particularly safely and reliably around the pressure roller and inserted into the gap between the pressure roller and the draw-off roller. In addition, this means that no adjustment work is required on the thread guide device in relation to the work site and at the same time it can be prevented that the piece of thread to be attached gets caught on organs of the textile machine or on the pressure roller itself and is therefore not reliably inserted.
  • the piece of thread to be attached is guided around a pressure roller of the pressure roller unit by means of the thread guide device arranged on the pressure roller unit and inserted into a regular thread path at the work site.
  • the piece of thread to be removed is guided over the thread guide or another thread guide in order to separate it from the piece of thread to be attached.
  • the thread guide device can be used to fix the piece of thread to be removed during the separation of the thread loop.
  • the piece of thread to be removed is preferably fixed in a fixing contour of the thread guide device.
  • the thread taken up by the spool is first unwound from the spool and then wound back onto the spool to produce parallel windings.
  • the thread can be guided through the thread positioning element in the constant position within the traversing range to produce the parallel windings. Only after generating the parallel windings using the Thread positioning element is then formed as previously described, the thread loop unwinding the previously formed parallel windings.
  • the angle of wrap of the thread on the preferably hook- or loop-shaped feed element is reduced and kept constant.
  • the friction of the thread is reduced because the thread no longer oscillates, but is unwound from the parallel windings previously produced.
  • the thread guide device is arranged on the axis of rotation of the pressure roller.
  • the pressure roller and the yarn guide device form a compact pressure roller unit that can be easily exchanged together.
  • the pressure roller unit has a pressure roller lever in which the axis of rotation is accommodated.
  • the yarn guide device is arranged on the pressure roller lever.
  • the thread guide device is designed in one piece with the pressure roller lever.
  • the pressure roller lever with the thread guide device can be produced in a particularly simple manner, for example as a bent sheet metal part.
  • the installation of the yarn guide device on the pressure roller lever or on the pressure roller unit is advantageously eliminated.
  • the thread guide device has a thread guide edge for the piece of thread to be attached to the thread loop.
  • the piece of thread to be attached can be separated from the piece of thread to be removed by being guided over the thread guide edge and also be guided around the pressure roller and thereby inserted into the take-off device.
  • the thread-guiding device has at least one thread-guiding edge and preferably at least one thread-fixing contour for the piece of thread to be removed.
  • the piece of thread to be removed can be separated from the piece of thread to be attached and fed to other handling devices, such as a cutting device.
  • the thread fixing contour can position the piece of thread correctly during the entire further process in relation to the handling devices of the work station.
  • the piece of thread to be attached is unwound from the spool in the opposite direction to its normal withdrawal direction during the formation of the thread loop and is thereby oscillated within a traversing range of the piece of thread to be attached.
  • the length of thread additionally required for forming the thread loop can hereby be made available from the spool in a simple manner by turning the spool backwards. Due to the fact that the thread was previously placed on the spool in cross-windings, it is oscillated accordingly when unwinding while the spool is being turned back.
  • the additional length of thread for forming the thread loop from a thread store, to which it has previously been supplied.
  • the bobbin remains stationary while the thread loop is being formed, so that the piece of thread to be attached does not oscillate.
  • the traversing piece of thread to be attached is guided by a thread positioning element in a constant position within the traversing area while the thread loop is being formed.
  • the separation of the two pieces of thread is made easier by the constant position of the piece of thread to be attached.
  • the thread positioning element is preferably arranged in a suction channel of the suction nozzle.
  • a work station for a textile machine with a pressure roller unit is proposed.
  • the pressure roller unit is designed according to the previous description.
  • the work station has a suction nozzle with a suction opening, with a suction channel and with a thread positioning element for positioning a thread piece of a thread loop.
  • the thread positioning element is arranged within the suction channel and can be adjusted between a rest position and a working position.
  • the thread positioning element is in the rest position, so that there is no risk of a piece of thread getting caught on the thread positioning element.
  • the thread positioning element completely clears the cross section of the suction channel, so that the thread end can be searched for and sucked in without any problems.
  • the thread positioning element protrudes into the suction channel of the suction nozzle and is thereby able to position the thread at a constant position of the traversing area in relation to the traversing area.
  • the piece of thread to be attached is guided in the constant position by the thread positioning element outside the center of the work station, in particular on a side of the traversing area remote from the piece of thread to be removed.
  • the separation of the two pieces of thread can be supported in this way, since the piece of thread to be attached can not only be prevented from traversing by means of the thread positioning element in the thread path after the thread positioning element, but can also be guided in the direction of the thread guide edge of the thread guide device assigned to it.
  • the thread positioning element is designed as a catch hook for an iridescent thread piece of the thread loop that is to be attached.
  • the thread positioning element can automatically come into engagement with the piece of thread and an active positioning or insertion of the thread piece into the thread positioning element is not necessary as a result.
  • the catching hook has a thread guiding contour on a first side, which guides the traversing piece of thread over the catching hook, and on a second side a thread catching contour, which catches the traversing piece of thread and positions it in a constant position within the traversing area. In this way it can be ensured that the piece of thread can reach the thread catching contour from any position within the traversing area and can thus be correctly positioned.
  • the thread positioning element is pivotably arranged in the suction channel of the suction nozzle.
  • the thread positioning element is spring-loaded in its rest position and can be moved into its working position by spring force.
  • the movement of the thread positioning element from the rest position to the working position and back can thus take place without a separate drive.
  • the thread positioning element is spring-loaded in the working position and can be returned to the rest position by spring force.
  • the suction opening of the suction nozzle is provided in a nozzle piece that is displaceably arranged in the suction channel of the suction nozzle.
  • the catch hook or the thread positioning element can be adjusted from its rest position to its working position and back by moving the mouthpiece.
  • the suction nozzle is advantageously provided for a stationary arrangement at the work station of the textile machine.
  • a mouthpiece arranged displaceably in a suction channel of the suction nozzle is fed to the spool, with the thread positioning element being brought into a working position at the same time by moving the mouthpiece.
  • the mouthpiece preferably covers the thread positioning element in its pushed-back position, which element is spring-loaded and is located outside the suction channel of the suction nozzle. With the displacement of the mouthpiece in the direction of the spool, the thread positioning element is released at the same time and brought into its working position by means of the spring and thereby pivoted into the suction channel.
  • the mouthpiece is pulled back after the thread loop has been formed, with the Thread positioning element is brought from the working position to its rest position.
  • the thread positioning element is preferably pressed back into its rest position by the mouthpiece against the spring force and, once the rest position has been reached and the mouthpiece is in the retracted position, it is again covered by the mouthpiece.
  • the mouthpiece does not necessarily have to be pulled back immediately after the suture loop has been opened. If necessary, the mouthpiece can also only be withdrawn after the yarn end has been prepared or immediately before piecing.
  • FIG. 1 shows a work station 2 of a textile machine 1 in a schematic, sectional side view.
  • the present textile machine 1 is designed as a spinning machine and conventionally has a spinning element, for example a spinning rotor or an air spinning nozzle, as a yarn feed device 3, to which a fiber material (not shown) is fed.
  • the thread feeding device 3 would be designed as a pay-off spool.
  • the thread 4 supplied by the thread feed device 3 is drawn off by means of a take-off device, which consists of a take-off roller 6 and a pressure roller unit 16 with a pressure roller 5, and fed to a winding device, where it is wound onto a bobbin 7.
  • a thread end 4a runs (see figure 2 ) of the thread 4 onto the spool 7 and has to be found there to start again.
  • a suction nozzle 8 is provided at the work station 2, which in the present case is designed as a work station's own suction nozzle 8 and is arranged stationary, ie immovably with respect to the work station 2.
  • the suction nozzle 8 has a suction channel 9, in which the thread end 4a (see FIG figure 2 ) can be sucked in.
  • the suction nozzle 8 is connected to a negative pressure channel 10, via which it is supplied with the required negative pressure for sucking in the thread end 4a.
  • the thread 4 runs through the suction nozzle 8 during production, for which purpose the suction nozzle has an entry opening 12 at which the thread 4 enters.
  • the thread 4 leaves the suction nozzle 8 via the suction opening 11, from where it is fed to the bobbin 7.
  • a feeder organ 13 is provided at the work station 2, which is pivotally mounted on the work station 2 (see arrow and dash-dotted representation) and which is explained in more detail with reference to the following figures. Furthermore, a piecing element 25 is arranged at the work station 2 .
  • the regular withdrawal direction of the thread 4 is denoted by AR.
  • figure 2 shows a situation at work station 2 in which, after an interruption in production, the thread end 4a that has run onto the bobbin 7 has already been sought out by means of the suction nozzle 8 and sucked into it.
  • the feeder element 13 Before the thread end 4a is sucked in, the feeder element 13 has already been removed from the figure 1 position shown in the in figure 2 pivoted position shown, in which it extends into the suction channel 9 of the suction nozzle 8. Now that the thread end 4a has been sucked into the suction channel 9 of the suction nozzle 8, the thread end 4a can be moved by means of the feeder element 13 are taken and the handling organs of the workplace, in particular the piecing organ 25, are delivered.
  • the handling organs of the work station 2 are understood to mean all organs that are required in any way for attaching the thread 4 .
  • these are, for example, the piecing element 25, the take-off device with the take-off roller 6 and the pressure roller 5 and the feeder element 13.
  • other handling elements such as thread storage, pneumatic handling elements, further feeder elements and the like can be provided.
  • figure 3 shows another situation at the work station 2 of the textile machine 1, in which the thread end 4a received in the feeder element 13 is being fed to the piecing element 25, with the thread end 4a forming a thread loop with a thread piece 4b to be attached and a thread piece 4c to be removed.
  • the piece of thread 4b to be attached is now separated from the piece of thread 4c to be removed by means of the piecing member 25, prepared for attachment and reinserted into its regular thread path at the work station 2.
  • the piece of thread 4c to be removed is removed and disposed of via the suction nozzle 8 and the vacuum channel 10 after it has been separated from the piece of thread 4b to be attached.
  • FIG 4 shows a schematic front view of a work station 2 of a textile machine 1 with a stationary suction nozzle 8 arranged at the work station, of which only the suction opening 11 can be seen in the present case is.
  • a thread paraffining device (not specified)
  • a take-off device with the take-off roller 6 and the pressure roller 5, which is mounted in a pressure roller lever 21 by means of its axis of rotation 20.
  • the pressure roller lever 21 By means of the pressure roller lever 21, the pressure roller 5 can be pressed against the take-off roller 6 or can be lifted from it in order to be able to insert the thread 4 back into the take-off device when it is attached.
  • the piecing element 25 which is designed here as a combined cutting and blowing unit and has a first thread guide 26, into which the thread piece 4c to be removed can be inserted and separated from the thread piece 4b to be attached by means of a separating device can, as well as a second thread guide 27, in which the piece of thread 4b to be attached can be received and the thread feeding device 3 can be delivered again.
  • the piece of thread 4c to be removed is fixed due to the suction in the suction channel 9 of the suction nozzle 8 between the inlet opening 12 of the suction nozzle 8 and the feeder element 13 and is always in a constant position, here in the left area of the figure.
  • the thread end 4b to be attached would constantly oscillate back and forth over the traversing area without further measures and thus repeatedly come together with the thread piece 4c to be removed, which makes it difficult to separate the two thread pieces 4b, 4c. It is therefore a thread positioning element 17 is provided, which fixes the piece of thread 4b to be attached at a constant position in relation to the traversing area CB.
  • the thread positioning element 17 has a thread guide contour 22 and opposite the thread guide contour 22 a thread catch contour 23 .
  • the piece of thread 4b to be attached moves from left to right within the traversing area CB, it first slides over the thread guide contour 22 of the thread positioning element 17 and is initially traversed further until it reverses its direction of movement and now from the other side onto the thread catching contour 23 of the thread positioning element 17 meets. If, on the other hand, the thread 4 is already on the other side of the thread positioning element 17 at the beginning of the rewinding, it naturally hits the thread catching contour 23 without first sliding over the thread guide contour 22 from the left.
  • the two thread pieces 4b and 4c each reach a thread guide edge 18 assigned to them on the already in figure 4 described thread guide device 15.
  • a single thread guide device 15 is shown, which is designed in one piece with the pressure roller lever 21.
  • the Thread guide device 15 has a thread guide edge 18 (on the right in the present figure) for the piece of thread 4b to be attached, which guides this past the pressure roller 5 laterally (here on the right) and behind the pressure roller 5 in order to insert it into the take-off device.
  • the thread guide device 15 in the present case has a further thread guide edge 18 for the thread piece 4c to be removed, which guides this into a fixing contour 19, in which it is held and guided during the subsequent yarn end preparation.
  • figure 6 1 now shows a situation at the work station 2 of the textile machine 1, in which the two pieces of thread 4a and 4b have been successfully separated from one another by means of the thread guide device 15 and have been presented to the piecing element 25.
  • the thread piece 4b to be attached is already inserted back into its regular thread path at the work station 2, in which it is located between the take-off roller 6 and the pressure roller 5.
  • another stationary thread guide device 15 can be provided at the spinning station, as shown here, which guides the piece of thread 4b to be attached to the middle of the work station 2 and continues to do so after insertion in the middle leads.
  • the piece of thread 4b to be attached is also inserted into the second thread guide 27 of the piecing element 25 and is thereby automatically positioned correctly in relation to the thread feeding device 3, so that after it has been separated from the piece of thread 4c to be removed, it can be returned there without any problems and safely .
  • the piece of thread 4c to be discharged is inserted into the first thread guide 26 of the piecing element 25 and is thereby simultaneously fed to a separating device which is arranged on the piecing element 25 and is not shown separately here.
  • the thread fixing contour 19 of the thread guide device 15 is positioned in relation to the first thread guide 26 in such a way that the thread piece 4c to be removed is automatically inserted into it as soon as the feeder element 13 moves further down.
  • FIG 7 shows another perspective detailed view of the pressure roller unit 16, which in the present case consists of the pressure roller lever 21, the pressure roller 5, the axis of rotation 20 and the thread guide device 15.
  • the thread guide edge 18 and the fixing contour 19 for the thread piece 4c to be removed are facing the viewer, while the thread guide edge 18 for the thread piece 4b to be attached faces away from the viewer.
  • the pressure roller lever 21 is designed in one piece with the thread guide device 15 as a bent sheet metal part and can thus be manufactured easily.
  • the pressure roller unit 16 with the yarn guide device 15 and the pressure roller 5 and the axis of rotation 20 forms a separate unit from the pressure roller lever 21 .
  • first thread guide device 15 with two thread guide edges 18 can be provided. It is also possible to provide a first thread guide device 15 with a thread guide edge 18 for the piece of thread 4b to be attached and a further thread guide device 15 with a thread guide edge 18 for the piece of thread 4c to be removed, which can also be arranged separately from one another on the pressure roller unit 16. Likewise, a first thread guide device 15 can be arranged on the pressure roller lever 21 and a further thread guide device 15 can be arranged directly on the axis of rotation 20 of the pressure roller 5 .
  • the feeder element 13 does not necessarily have to be pivoted either, but can also perform a translatory or link-controlled movement with a corresponding arrangement of the components and handling elements at the work station 2 .
  • the piecing element 25 can not only as present as combined cutting/blowing unit, but can also provide the separating device, the yarn end preparation and optionally a return device for returning the thread end to the thread feed device 3 in separate units.
  • FIG. 8 Furthermore, FIG. Furthermore, the suction nozzle 8 is already in the Figures 4-6 described thread positioning element 17 shown, which from its in the figure 8 illustrated rest position AP in its in the figure 9 shown working position AP moves, in particular pivoted, can be. In the rest position RP, the thread positioning element 17 completely releases the suction channel 9 (the clear cross section inside the suction nozzle 8), while in its working position AP it protrudes into the suction channel 9 and can thereby position the thread piece 4b to be attached.
  • the thread positioning element 17 In the rest position RP, the thread positioning element 17 completely releases the suction channel 9 (the clear cross section inside the suction nozzle 8), while in its working position AP it protrudes into the suction channel 9 and can thereby position the thread piece 4b to be attached.
  • the thread positioning element 17 is covered by the mouthpiece 14 in its rest position RP and is subjected to spring force by a spring element 24 . If the mouthpiece 14 is now moved out of the suction nozzle 8 and fed to the bobbin (not shown here), the thread positioning element 17, which is rotatably mounted on the suction nozzle 8, is thereby released at the same time and moved into its working position AP by the spring force of the spring element 24 spent which in figure 9 is shown. When the mouthpiece 14 is moved back into the interior of the suction nozzle 8, the mouthpiece 14 pushes the thread positioning element 17 back into its rest position RP, with the spring element 24 being provided with a pretension at the same time. It is thus possible, by actuating the mouthpiece 14, to simultaneously actuate the thread positioning element 17 and bring it into its working position AP and back into its rest position RP.

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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)
  • Looms (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)

Claims (16)

  1. Procédé pour former une boucle de fil et pour séparer un morceau de fil à rattacher (4b) et un morceau de fil à évacuer (4c) de la boucle de fil à un poste de travail (2) d'une machine textile (1), dans lequel un fil (4) est prélevé à partir d'une bobine (7) au moyen d'une buse d'aspiration (8), la boucle de fil est formée à partir du fil (4) et dans lequel, au moyen d'au moins un dispositif de guidage de fil (15) propre au poste de travail, le morceau de fil à rattacher (4b) et le morceau de fil à évacuer (4c) sont séparés l'un de l'autre, dans lequel le poste de travail (2) présentant une unité de rouleau presseur (16), caractérisé en ce que, pour séparer les morceaux de fil (4b, 4c), au moins l'un des morceaux de fil (4b, 4c), en particulier le morceau de fil (4b) à rattacher, est guidé pendant la formation de la boucle de fil sur au moins un dispositif de guidage de fil (15) disposé au niveau du poste de travail (2), le dispositif de guidage de fil (15) étant disposé directement sur l'unité de rouleau presseur (16) du poste de travail (2).
  2. Procédé selon la revendication précédente, caractérisé en ce que le morceau de fil à rattacher (4b) est guidé autour d'un rouleau presseur (5) de l'unité de rouleau presseur (16) au moyen du dispositif de guidage de fil (15) disposé au niveau de l'unité de rouleau presseur (16) et est inséré dans un trajet de fil régulier au niveau du poste de travail (2).
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, pendant la formation de la boucle de fil, le morceau de fil à rattacher (4b) est déroulé de la bobine (7) à l'encontre d'une direction d'extraction régulière (AR) et est ainsi déplacé en va-et-vient à l'intérieur d'une zone de va-et-vient (CB) du morceau de fil à rattacher (4b).
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, pendant la formation de la boucle de fil, le morceau de fil à rattacher (4b) est guidé par un élément de positionnement de fil (17) dans une position constante à l'intérieur de la zone de va-et-vient (CB), de préférence en dehors d'un milieu du poste de travail (2), et de manière particulièrement préférée, est guidé dans la position constante sur un côté de la zone de va-et-vient (CB) détourné du morceau de fil à évacuer (4c).
  5. Procédé selon la revendication 4, caractérisé en ce que, pour saisir le fil (4), une pièce d'embouchure (14), disposée de manière à pouvoir être déplacée dans un canal d'aspiration (9) de la buse d'aspiration (8), est amenée à la bobine (7), l'élément de positionnement de fil (17) étant simultanément amené dans une position de travail (AP) par le déplacement de la pièce d'embouchure (14), et en ce que, de préférence après la formation de la boucle de fil, la pièce d'embouchure (14) est retirée, l'élément de positionnement de fil (17) étant simultanément amené de la position de travail (AP) dans une position de repos (RP).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, pendant la formation de la boucle de fil, le morceau de fil à évacuer (4c) de la boucle de fil est guidé sur le dispositif de guidage de fil (15) et est fixé dans un contour de fixation (19) du dispositif de guidage de fil (15).
  7. Unité de rouleau presseur (16) pour un dispositif d'extraction d'un poste de travail (2) d'une machine textile (1), avec un rouleau presseur (5) en forme de rouleau, monté de manière rotative sur un axe de rotation (20), caractérisée en ce que l'unité de rouleau presseur (16) est pourvue d'au moins un dispositif de guidage de fil (15), en particulier d'une tôle de guidage de fil, pour séparer un morceau de fil à rattacher (4b) et un morceau de fil à évacuer (4c) d'une boucle de fil, le dispositif de guidage de fil (15) étant disposé directement sur l'unité de rouleau presseur (16).
  8. Unité de rouleau presseur (16) selon la revendication précédente, caractérisée en ce que le dispositif de guidage de fil (15) est disposé sur l'axe de rotation (20) du rouleau presseur (5), l'unité de rouleau presseur (16) comprenant de préférence un levier de rouleau presseur (21) dans lequel est accueilli l'axe de rotation (20), et le dispositif de guidage de fil (15) étant de préférence disposé sur le levier de rouleau presseur (21).
  9. Unité de rouleau presseur (16) selon la revendication 8, caractérisée en ce que le dispositif de guidage de fil (15) est formé d'une seule pièce avec le levier de rouleau presseur (21).
  10. Unité de rouleau presseur (16) selon l'une quelconque des revendications 7 à 9, caractérisée en ce que le dispositif de guidage de fil (15) présente au moins un bord de guidage de fil (18) pour le morceau de fil à rattacher (4b) de la boucle de fil et/ou en ce que le dispositif de guidage de fil (15) présente au moins une arête de guidage de fil (18) pour le morceau de fil à évacuer (4c) de la boucle de fil.
  11. Poste de travail (2) d'une machine textile (1) avec une unité de rouleau presseur (16) selon l'une quelconque des revendications précédentes.
  12. Poste de travail (2) selon la revendication précédente, caractérisé en ce que le poste de travail comprend une buse d'aspiration (8) avec une embouchure d'aspiration (11), avec un canal d'aspiration (9) et avec un élément de positionnement de fil (17) pour positionner un morceau de fil (4b, 4c) d'une boucle de fil, l'élément de positionnement de fil (17) étant disposé à l'intérieur du canal d'aspiration (9) et pouvant être déplacé entre une position de repos (RP) et une position de travail (AP).
  13. Poste de travail (2) selon la revendication précédente, caractérisé en ce que l'élément de positionnement de fil (17) est réalisé sous la forme d'une crosse de capture pour un morceau de fil (4b) de la boucle de fil à rattacher se déplaçant en va-et-vient.
  14. Poste de travail (2) selon la revendication précédente, caractérisé en ce que la crosse de capture présente, sur un premier côté, un contour de guidage de fil (22) qui guide le morceau de fil (4b) à rattacher, se déplaçant en va-et-vient, par-dessus la crosse de capture, et, sur un deuxième côté, un contour de capture de fil (23) qui capture le morceau de fil (4b) et positionne celui-ci dans une position constante à l'intérieur d'une zone de va-et-vient (CB) du morceau de fil (4b).
  15. Poste de travail (2) selon l'une quelconque des revendications 12 à 14 précédentes, caractérisé en ce que l'élément de positionnement de fil (17), en particulier la crosse de capture, est précontraint par ressort dans sa position de repos (RP) et peut être déplacé dans sa position de travail (AP) par la force du ressort.
  16. Poste de travail (2) selon l'une quelconque des revendications 12 à 15 précédentes, caractérisé en ce que l'embouchure d'aspiration (11) est prévue dans une pièce d'embouchure (14) disposée de manière déplaçable dans le canal d'aspiration (9) de la buse d'aspiration (8) et en ce que l'élément de positionnement de fil (17), en particulier la crosse de capture, peut être déplacé de sa position de repos (RP) à sa position de travail (AP) et inversement par déplacement de la pièce d'embouchure (14).
EP19161901.4A 2018-03-14 2019-03-11 Procédé de formation d'une boucle de fil et de séparation d'une section de fil à utiliser et d'une section de fil à évacuer et unité de rouleaux presseurs Active EP3546406B1 (fr)

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DE102018105933.7A DE102018105933A1 (de) 2018-03-14 2018-03-14 Verfahren zum Bilden einer Fadenschlaufe und zum Separieren eines anzusetzenden Fadenstücks und eines abzuführenden Fadenstücks, Druckrollereinheit sowie Saugdüse

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JP (1) JP7260345B2 (fr)
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DE102021123885A1 (de) 2021-09-15 2023-03-16 Rieter Automatic Winder GmbH Fadenverlegungsvorrichtung für eine Fadenverbindungseinheit einer Kreuzspulen herstellenden Textilmaschine

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CN110273205A (zh) 2019-09-24
DE102018105933A1 (de) 2019-09-19
CN110273205B (zh) 2023-03-10
JP7260345B2 (ja) 2023-04-18
JP2019199363A (ja) 2019-11-21
EP3546406A1 (fr) 2019-10-02

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