EP0808929B1 - Device for guiding and/or supporting yarns - Google Patents

Description

The present invention relates to the field of the textile industry, in particularly the treatment of the threads, in particular by washing and / or dyeing the threads and relates to a device for guiding and / or supporting wires, in particular for textile machines working wet yarn.

Textile threads generally undergo, before their use, especially for weaving, washing and / or bleaching treatments as well than dye. These various treatments are carried out wet, having as a consequence a humidity of said threads during the whole duration of the treatment and the passage to the various treatment stations.

At the entrance of these, the wires need to be perfectly maintained and guided, in order to avoid any tangle detrimental to a good operation.

Currently, the holding and guiding devices consist generally in combs and, possibly, in fixed supports. Combs are in the form of a set of teeth arranged at regular intervals on a support bar, if necessary adjustable, each interval between teeth guiding a wire. The fixed supports are generally under form of cylindrical bars extending transversely to a sheet of wires and under the latter. Such bars are also used to achieve the maintenance of a layer of wires against vibrations causing jumps of wires which may result in a harmful intermingling of said wires.

However, during the running of the wires on these guide devices and holding, the outer fibrils, which rub on said devices, break and detach from said wires and deposit on the combs and other guides, whether foul by forming a flock. In the case of dry wire guidance, this fluff can be easily detached, during operation, by blowing or other cleaning.

However, when treating wet yarns, following washing or a dyeing operation, the guidance becomes more complex, the wet fluff in formation sticking and agglomerating on the guide support, on which the yarn and from which it cannot be detached by known dry processes. Indeed, the thread wet forms, at the places of friction, a beard which solidifies and which detaches periodically while being driven by the wire.

It follows that the wire breaks and binds with neighboring wires or that the agglomerated beard is entrained by the wire and wound with the latter, which has as a consequence a fault in the coils. Depending on the frequency of training fluff, the corresponding cleaning becomes difficult and requires repetition harmful with a risk of disturbance and breakage of the wires. The same problems arise with smooth supports for wire layers.

As a result, proper cleaning of guides or supports is practically possible only when the treatment line is completely stopped which results in disruptive productivity.

We also know, from DE-A-32 01 400, a guide device and / or yarn support, in particular for textile machines working the yarn wet, which is constituted by a means for guiding and / or supporting the wires individual layers of wire, mounted with the possibility of rotation on a chassis carrier integral with the machine or directly in bearings provided on said machine, said means for guiding and / or supporting the individual wires being produced in the form of a rotary comb constituted by a stack of discs separated by spacers. Comparable devices are also known from DE-A-33 03 024, as well as by FR-A-2 470 179.

However, these known devices do not provide any possibility individual retraction, in particular for a simplified disassembly, or means allowing an improvement of the threading.

The object of the present invention is to overcome these drawbacks by proposing a device for guiding and / or supporting wires, in particular for textile machines working the yarn in the wet, allowing guidance and / or optimal maintenance of the threads of a tablecloth, while avoiding the formation of fluff agglomerated humid areas liable to hamper the proper functioning of a treatment and allowing improved donning.

For this purpose, the guide and / or wire support device, in particular for textile machines working wet yarn, which is essentially constituted by a means for guiding and / or supporting the wires individual layers of wire, mounted with the possibility of rotation on a chassis carrier integral with the machine or directly in bearings provided on said machine, said means for guiding and / or supporting the individual wires being produced in the form of a rotary comb consisting of a stack of separate discs (5) by spacers, is characterized in that the guide and / or support means individual yarns of a web of yarns is retractably mounted on the supporting frame secured to the machine or in bearings provided on the machine.

la figure 1 est une vue en élévation latérale et en coupe d'un dispositif conforme à l'invention, le moyen de guidage et/ou de support des fils étant représenté en position de service et à l'état extrait de ses paliers ;

la figure 2 est une vue en plan, à plus petite échelle, du dispositif suivant la figure 1, et

la figure 3 est une vue en élévation frontale suivant la figure 2.

The invention will be better understood from the description below, which relates to a preferred embodiment, given by way of nonlimiting example, and explained with reference to the appended schematic drawings, in which:

Figure 1 is a side elevational view in section of a device according to the invention, the guide means and / or support of the son being shown in the service position and in the extracted state of its bearings;

FIG. 2 is a plan view, on a smaller scale, of the device according to FIG. 1, and

FIG. 3 is a front elevation view according to FIG. 2.

Figures 1 to 3 of the accompanying drawings show, by way of example, a guide and / or wire support device, in particular for machines textiles working wet yarn, which is essentially constituted by a means 1 for guiding and / or supporting the individual wires 2 of a layer of wires, mounted with the possibility of rotation on a carrying frame 3 secured to the machine 4 or directly in bearings provided on said machine 4, said guide means 1 and / or for supporting the individual wires 2 being produced in the form of a rotary comb consisting of a stack of discs 5 separated by spacers 6.

According to the invention, the means 1 for guiding and / or supporting individual wires 2 of a sheet of wires is retractably mounted on the support frame 3 secured to the machine 4 or in bearings provided on the machine 4.

The mounting of the means 1 with the possibility of rotation allows the wire while scrolling always removes previous deposits during its passage on said means 1, so that the latter becomes self-cleaning. This means 1 for guiding and / or supporting the individual wires 2 of a layer of wires is produced in the form of a rotary comb constituted by a stack of discs 5 separated by spacers 6, the assembly being clamped on a shouldered shaft 7 by via a nut 8 and washers 9 and 10. Depending on the title or number metric of the wires to be guided, the spacing between the discs 5 and their thickness can be modified, respectively by replacing the spacers 6 with thicker or thinner spacers and by replacing the discs 5 with 5 thicker or thinner discs.

In addition, the discs 5 are advantageously provided with an edge peripheral chamfered. As a result, the threading of the threads is facilitated, these being guided during this operation to be brought into the bottom delimited between two neighboring 5 discs.

Such a comb therefore allows perfect adaptation to all configurations of plies of wires possible by simple mounting of the discs 5 and spacers 6 corresponding to requirements.

According to the invention, and as more particularly shown in Figure 1 of the accompanying drawings, the means 1 of guiding and / or supporting the individual wires 2 of a layer of wires is mounted retractable on the supporting frame 3 secured to the machine 4 or in bearings provided on the machine 4. For this purpose, at least one of the bearings of the chassis 3 or those provided on machine 4 is an open bearing, while the other bearing is a spherical bearing. Thus, the cleaning of the means 1, between two operations of wire treatment, is facilitated and can in particular be carried out with a water jet, without risk damage, in particular for the machine's electrical circuits, medium 1 being simply extracted from its bearings by raising one of its ends out of the open bearing and removal of the other bearing from its housing.

The means 1 can simply be removably mounted in plain bearings of the support 3, its rotational drive being produced by the friction of the threads in movement 2.

Preferably, the means 1 for guiding and / or supporting the wires individual 2 of a ply of son cooperates, by at least one of its ends, with a drive device 11 provided on the carrying frame 3 or on at least one bearing secured to the machine 4. Such a drive device 11 allows to ensure a constant speed of rotation which can be perfectly adapted to the linear speed of the moving wires, so that the relative friction of the wires on means 1 can be reduced optimally.

The drive device 11 is advantageously constituted by in the form of a geared motor assembly provided on its output shaft with a coach 12 cooperating with an element 13 of the corresponding end of the shouldered shaft 7 of the means 1 (Figure 1). The coach 12 is advantageously under shape of a stirrup having in its wings receiving slots of the element 13 in the form of a pin passing through the end of the shouldered shaft 7, this end being constituted by a ball joint and the bearing of the chassis 3 or provided directly on the machine 4, opposite the drive device 11, is an open bearing. It results from this construction a simple and rapid release of means 1, as shown in Figure 1 of the accompanying drawings.

In order to ensure perfect retention of the wires on means 1, in particular between the discs 5 forming the teeth of the comb, the device is completed by a rotary holding cylinder 14 extending in front of the means 1, seen in the direction of travel of the wires 2, and above the latter, this cylinder holding rotary 14 being mounted on the chassis 3 or directly on the machine 4. Such a cylinder 14 keeps the wires 2 perfectly on the means 1 and thus avoiding wire breaks and tangles resulting therefrom.

According to a characteristic of the invention, the rotary cylinder of support 14 is mounted on the chassis 3 or on the machine 4 in a pivotable manner, perpendicular to the direction of travel of the wires 2, with indexing in the extreme pivoting positions. A pivotable mounting of the cylinder 14 and indexing in position is not described or shown in detail, but may be made by means of a bent or other cooperating lever at its end opposite to that carrying the cylinder 14, with an indexing means in the form of a snap-in or spring loaded ball and section recesses corresponding.

In accordance with another characteristic of the invention, the cylinder holding rotary 14 can be fitted with a geared motor for rotation (not shown), promoting reduced friction contact with the wires 2. Such an embodiment is not shown in the accompanying drawings.

According to another characteristic of the invention, and as shown in the Figure 3 of the accompanying drawings, the rotary holding cylinder 14 is in contact, by its envelope, with the envelope of the means 1 for guiding and / or supporting the wires individual 2 and is rotated by said means 1, by contact. Good of course, it is also possible to carry out a contact training means of the rotary holding cylinder 14 provided with a geared motor drive in rotation, the means 1 for guiding and / or supporting the wires 2 individual being simply mounted in plain bearings.

Finally, according to another characteristic of the invention, in the case of mounting of the means 1 for guiding and / or supporting the individual wires 2 on a supporting frame 3, the latter can be secured to the machine 4 by by means of a carriage 15 movable on a rail 16 of the machine 4, transversely to the direction of travel of the wires 2 (Figures 2 and 3). So it is possible to move the means 1 out of the normal path of the wires 2, which can be particularly advantageous for the threading of wires in places hardly accessible.

Thanks to the invention, it is possible to produce a guiding device and / or yarn support, in particular for textile machines working the yarn wet to avoid agglomeration of wet fluff by self-cleaning of said device during the continuous scrolling of the wires. This results in an interview ease of machines using such devices and improved productivity because machine downtime can be reduced significantly.

In addition, due to better maintenance of the wires avoiding tangles and the fact that the flock agglomeration is avoided, the breaks of threads are also reduced significantly, which also affects favorably on productivity.

Of course, the invention is not limited to the embodiment described and shown in the accompanying drawings. Modifications are still possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims (12)

1. Device for guiding and/or supporting threads, in particular for textile machines working the thread wet, consisting essentially of a means (1) of guiding and/or supporting individual threads (2) in a lap of threads, mounted with the possibility of rotation on a carrier frame (3) fixed to the machine (4) or directly in bearings provided on the said machine (4), the said means (1) of guiding and/or supporting individual threads (2) being produced in the form of a rotary comb consisting of a stack of discs (5) separated by spacers (6), characterised in that the means (1) of guiding and/or supporting individual threads (2) in a lap of threads is mounted retractably on the carrier frame (3) fixed to the machine (4) or in bearings provided on the machine (4).
2. Device according to Claim 1, characterised in that the discs (5) are provided with a peripheral bevelled edge.
3. Device according to either one of Claims 1 and 2, characterised in that at least one of the bearings of the frame (3) or one of those provided on the machine (4) is an open bearing whilst the other bearing is a swivel bearing.
4. Device according to any one of Claims 1 to 3, characterised in that the means (1) of guiding and/or supporting individual threads (2) in a lap of threads cooperates, by at least one of its ends, with a driving device (11) provided on the carrier frame (3) or on at least one bearing fixed to the machine (4).
5. Device according to Claim 4, characterised in that the driving device (11) is advantageously in the form of a geared motor assembly provided on its output shaft with a driver (12) cooperating with an element (13) on the corresponding end of the shouldered shaft (7) of the means (1).
6. Device according to Claim 5, characterised in that the driver (12) is advantageously in the form of a stirrup having in its arms slots for receiving the element (13) in the form of a pin passing through the end of the shouldered shaft (7), this end consisting of a swivel, and the bearing on the frame (3) or provided directly on the machine (4), opposite the driving device (11), is an open bearing.
7. Device according to any one of Claims 1 to 6, characterised in that it is supplemented by a rotary holding cylinder (14) extending in front of the means (1), seen in the direction of movement of the thread (2), and above the latter, this rotary holding cylinder (14) being mounted on the frame (3) or directly on the machine (4).
8. Device according to Claim 7, characterised in that the rotary holding cylinder (14) is mounted on the frame (3) or on the machine (4) so that it can pivot, perpendicularly to the direction of movement of the threads (2), with positive location in the extreme pivoting positions.
9. Device according to either one of Claims 7 and 8, characterised in that the rotary holding cylinder (14) is provided with a geared motor for driving in rotation.
10. Device according to any one of Claims 4, 7 and 8, characterised in that the rotary holding cylinder (14) is in contact, through its casing, with the casing of the means (1) of guiding and/or supporting the individual threads (2) and is rotated by the said means (1), by contact.
11. Device according to any one of Claims 1 and 8 to 10, characterised in that the rotary holding cylinder (14) is contact, through its casing, with the casing of the means (1) of guiding and/or supporting the individual threads (2), driving by contact being achieved by means of the rotary holding cylinder (14) provided with a geared motor for driving in rotation, the means (1) of guiding and/or supporting the individual threads (2) being simply mounted in plain bearings.
12. Device according to any one of Claims 1 to 11, characterised in that, in the case of the mounting of the means (1) of guiding and/or supporting the individual threads (2) on a carrier frame (3), the latter is secured to the machine (4) by means of a carriage (15) which can be moved on a rail (16) on the machine (4), transversely to the direction of movement of the threads (2).

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