EP0360149A1 - Process and apparatus for automatically exchanging spools on a flyer - Google Patents

Abstract

The doffing time of a flyer 3 can be considerably reduced if the carrier 21 carrying empty sleeves 11 is moved from the vertical transport position into the inclined position and thus in alignment with the inclined coil carriage 6 in a movement sequence, without intermediate storage 49. The full sleeves 10 are conveyed analogously.

Description

The invention relates to a method and a device for the automatic exchange of full by empty sleeves on a flyer according to the preambles of claims 1, 6 and 11.

A known flyer doffing device, the precursor of which was described in U.S. Patent No. 4,757,679, operates as follows:
In the infeed position, empty sleeves hang on a carrier cum transit bar, which sleeves have been transferred to the carrier by the hanging transport device coming from a ring spinning machine. In a vertical downward movement, the carrier places the empty tubes in two longitudinal rows on an intermediate shelf which extends in front of the base and extends parallel to the flyer, that is to say two parallel plates or strips which are fitted with push-on pins and which extend in the longitudinal direction of the flyer can be moved by half a division, and starts up again. The plates shift by half a division related to the placement of the full sleeves in the flyer. At the middle level of the flyer, the flyer has a horizontal swivel and slide rod that extends over its full effective length and beyond, and a translator can be displaced over the flyer length via this rod. The converter is aligned in the vertical position on the clipboard and can be brought into an inclined position inclined to the flyer by means of a lever construction, in which inclined position it is with the full sleeves to be replaced, which are lowered from the operating or spinning position and tilted into an inclined position is aligned on carriages holding spindles. The converter has twelve holding pins at the end of its lifting cylinder, with which it pulls the full sleeves off the carriage in groups, and places them on the clip-on pins of the clipboard between the empty sleeves already on it. When the entire flyer has been cleared, the stripes on the clipboard shift again by half a division. Now the converter is able to lift the empty sleeves in groups from the clipboard, bring them into an inclined position and put them back on the spindles on the carriage. The carriage with the complete number of empty tubes tilts back into the horizontal position and is lifted vertically into the correct piecing position. The carrier lowers again in order to lift the full sleeves from the clipboard and to convey them vertically into their upper removal position. From this removal position, the full sleeves are repositioned on the transport device by means of a pivotable lever arm, in order to subsequently use ring spinning machines to supply roving bobbins. Due to the group-wise working of the converter, both for the full tubes as well as for the empty tubes and due to the intermediate storage on the clipboard, there are long doff times in which it is not possible to spin. In addition, this well-known flyer doffing device is quite complex. After use, the converter is pushed aside on the slide rod from the sphere of action of the spindles and remains in this position on the flyer, which takes up space and impairs accessibility.

It is therefore, starting from the prior art described above, the object of the present invention to propose a method and a device in which the doffing time can be significantly reduced while simplifying the design and the accessibility of the flyer can be improved. Another important task is to create a retrofit option for adding doffer, which means that existing flyers that are hand-hoped for can be modernized, especially flyers that are equipped with a tilting trolley. These objects are achieved by the characterizing features of claims 1, 6 and 11. It is now possible to dispense entirely with a converter and, if appropriate, with the clipboard, so that the flyer can be produced more cost-effectively. In a simple way, all full tubes can be removed from the coil carriage instead of in groups, and all empty tubes can be placed on the carriage at once. The time saved in this way benefits the efficiency of the flyer. By eliminating the clipboard, the flyer will be even more accessible. The inexpensive, space-saving construction of the tiltable trolley can preferably be retained because the drive mechanism does not have to be disconnected. The embodiment according to claim 11 can, however, also be used for a purely vertical mode of operation, for example for flyers whose trolleys are extended with spindles that remain vertical, as was shown, for example, in EP-OS 310 568. When modernizing any flyer, the flyer itself does not need to be redesigned, provided that the car is either tiltable or extendable. The doffing time can be shortened again by the features of claims 3 to 5. Unless otherwise stated, everything in this document is to be regarded as inventive.

• Fig. 1: eine Stirnansicht einer Flyer-Doffeinrich­tung
• Fig. 2: einen Schnitt entlang der Linie II-II aus Fig. 1,
• Fig. 3a, 4a, 5a, 6a: eine Teildraufsicht des Wagens in verschiedenen Verfahrensstadien,
• Fig. 3b, 4b, 5b, 6b: eine Teildraufsicht des Trägers in überlagert korrespondierender Stellung,
• Fig. 7: eine Teilansicht mit weggebrochenen Partien gemäss Fig. 1, mit einer alternativen Aus­führungsform bezüglich des Hubmechanismus des Trägers,
• Fig. 8: einen Schnitt entlang der Linie VII-VII der Fig. 7,
• Fig. 9: einen Teilschnitt mit einer bevorzugten Aus­führungsform bezüglich der Zapfenhalterung im Träger, gemäss Fig. 1 oder 7, im vergrös­serten Massstab,
• Fig. 10: einen Schnitt einer ersten Ausführungsform einer Zapfen-Hülsen-Verbindung bei einer Vorrichtung gemäss Fig. 1 oder 7,
• Fig. 11: einen Schnitt einer zweiten Ausführungsform nach Fig. 10,
• Fig. 12: einen Schnitt einer dritten Ausführungsform nach Fig. 10,
• Fig. 13: einen Teilschnitt mit einer Änderung, bezogen auf Fig. 12,
• Fig. 14: eine Stirnansicht einer anderen Flyer-­Doffervorrichtung,
• Fig. 15: eine Draufsicht eines Trägers, bezogen auf Fig. 14,
• Fig. 16: ein Bewegungsablaufdiagramm des Doff-­Vorganges gemäss dem Stand der Technik (US-PS 4 757 679),
• Fig. 17: ein Bewegungsablaufdiagramm des Doff-­Vorganges gemäss Fig. 1 oder 7 mit Hilfe einer Zwischenablage,
• Fig. 18: ein Diagramm nach Fig. 17 ohne Zuhilfenahme einer Zwischenablage,
• Fig. 19: ein Bewegungsablaufdiagramm des Doff-­Vorganges gemäss Fig. 14 und 15 mit Hilfe einer Zwischenablage,
• Fig. 20: ein Diagramm nach Fig. 19 ohne Zuhilfenahme einer Zwischenablage, und
• Fig. 21: ein Diagramm nach Fig. 20 mit einer alterna­tiven Arbeitsweise.

The invention will now be explained in more detail with reference to the drawing. They show schematically:

• Fig. 1: an end view of a flyer doffing device
• 2: a section along the line II-II from FIG. 1,
• 3a, 4a, 5a, 6a: a partial top view of the car in different stages of the process,
• 3b, 4b, 5b, 6b: a partial top view of the carrier in a superimposed corresponding position,
• 7: a partial view with parts broken away according to FIG. 1, with an alternative embodiment with respect to the lifting mechanism of the carrier,
• 8: a section along the line VII-VII of FIG. 7,
• 9: a partial section with a preferred embodiment with respect to the pin holder in the carrier, according to FIG. 1 or 7, on an enlarged scale,
• 10: a section of a first embodiment of a pin-sleeve connection in a device according to FIG. 1 or 7,
• 11: a section of a second embodiment according to FIG. 10,
• 12: a section of a third embodiment according to FIG. 10,
• 13: a partial section with a change, based on FIG. 12,
• 14: a front view of another flyer doffer device,
• 15: a plan view of a carrier, based on FIG. 14,
• 16: a movement sequence diagram of the doffing process according to the prior art (US Pat. No. 4,757,679),
• 17: a movement sequence diagram of the doffing process according to FIG. 1 or 7 with the aid of a clipboard,
• 18: a diagram according to FIG. 17 without the aid of a clipboard,
• 19: a movement sequence diagram of the doffing process according to FIGS. 14 and 15 with the aid of a clipboard,
• 20: a diagram according to FIG. 19 without the aid of a clipboard, and
• FIG. 21: a diagram according to FIG. 20 with an alternative mode of operation.

Of a flyer 3 shown in FIG. 1, only the drafting device 4, the wings 5 and the bobbin wagon 6, which has already been lowered from its operating position and is in the tilted inclined position, are shown in accordance with the aforementioned US Pat. No. 4,757,679. The full sleeves 10, roving bobbins or flyer bobbins called, each consist of an empty sleeve 11 with a fiber ribbon pack 12 and are held by spindles 13 shown in dashed lines in Fig.1.

A carrier 21 cum transit bar, which extends over the entire length of the action, ie the entire spinning area, of the flyer of a doff device 20 completely separate from the flyer can be moved and / or moved on at least two one-piece slide rails 22 which are angled towards the carriage 6 and supported by profile supports 23 on the ground . movable. Each slide rail 22 has a vertical movement path 15a and an inclined movement path 15b, the inclination corresponding to the inclined position of the carriage 6. FIG. 2 shows an embodiment of an extruded profile of a slide rail 22, where it can be seen how the carrier 21 can be moved on the slide rail 22 by means of rollers 24 on the outside and rollers 25 on the inside of an open web 26 of the slide rail 22 and side guide rollers 27. The carrier 21 has in a conventional manner an endless belt 32 stretched around two deflection rollers 31 and movable by a motor 33. 9 to be explained in the form of plug-in pins 34, which are now spaced apart with respect to the division 35 of the sleeves on the carriage 6 and in the spinning positions, the half division 36, so that the number of Pin 34 is twice the number of spinning stations.
In Figure 1 above, the carrier 21 is in the removal position of the full sleeves 10, which is also the transport position of the empty sleeves 11. At this altitude, a known hanging transport device 40 is also arranged and also a pivotable lever arm 41, which the full sleeves 10 from the carrier 21 onto the transport device 40 and the empty sleeves 11 from the transport device 40 onto the carrier 21.

The mode of operation is described below with reference to Figures 3, 4, 5, 6:

Full sleeves must be replaced by empty sleeves. The full sleeves 10 are lowered with the carriage 6 and brought into the inclined position. In the meantime, the empty sleeves 11 on the carrier 21 are in the transport position. By means of at least two ropes 42 wrapped around deflection rollers 43, the carrier 21 together with the empty sleeves 11 is moved downward, first vertically, then through the angled shape of the slide rails 22 into the inclined position. Thus, the empty sleeves 11 are lowered into the inclined position in a continuous movement without intermediate storage. The empty pins 34 of the carrier 21 are aligned with the full sleeves 10. As a result, the empty sleeves 11 enter empty spaces 46 between the full sleeves 10 (FIG. 3). The empty pins 34 couple to the full sleeves 10. In this inclined position, the carrier 21 is lifted over the spindles 13 with full and empty sleeves (FIG. 4). Then the motor 33 is started and moves the belt 32 according to an arrow 47 by half a division 36 (FIG. 5). Now the empty sleeves 11 are aligned with the spindles 13. The carrier 21 lowers again in the inclined position and places the empty sleeves 11 on the spindles 13. The carrier 21 now only contains the full sleeves 10 located in the inclined position (FIG. 6). From this inclination, the full sleeves 10 in a continuous movement without Intermediate storage, raised or conveyed into the vertical removal position. The carrier 21 thus serves simultaneously as a crossing point of the empty coils 11 and the full coils 10. The clipboard 49 (shown in broken lines) from the prior art mentioned at the outset is therefore unnecessary in this example. This process is shown diagrammatically in FIG.

In the embodiment according to FIG. 7, the lifting mechanism of the carrier 21 has been realized by means of a height-adjustable sliding block 55. The sliding block 55 and a screw rod 57, which is used for height adjustment and is driven by a motor 56, are integrated in a vertical profile support 23a. Instead of the screw rod 57, form-fitting spindles, toothed racks, bands, etc. can also be used. The sliding block 55 has a tab 60 which projects through a longitudinal slot 61 of the profile support 23a. An articulated rod 62, possibly in connection with a cylinder 63, connects the tab 60 to the carrier 21. This alternative embodiment ensures that the carrier 21 is safely moved downward. The cable 42 stretched over the deflection roller 43 can be maintained for the purpose of balancing the weight of the carrier 21. In FIG. 8, the positions of the side guide rollers 27 are indicated by broken lines within a slide rail 22a that has been slightly modified compared to FIG.

The functioning of the device according to the invention depends crucially on rigid guides. FIG. 2 shows a suitable guidance of the carrier 21 on the slide rail 22, 22a. The pins 34 must also are rigidly guided, for example, as shown in Figure 9. The pins 34 are connected to the endless belt 32 via pin holders 68. Analogously to the embodiment according to FIG. 2, rollers 25.1 and lateral guide rollers 27.1 are also provided here, which are supported on a profile rail 69. Because of ribs 70 on the profile rail 69 rollers 24.1 are missing. The profile rail 69 advantageously encloses the entire length of the endless belt 32, wherein horizontal recesses 71 are provided for the deflection rollers 31. The pin holders 68 protrude through a continuous slot 72 at the bottom in the profile rail 69.

The connection between the pin 34 and the sleeve 11 must also be able to be made rigid. 10 to 13 show possible embodiments. Figure 10 (right half) shows a pin 34.1 with a stiffening or a support means in the form of a possibly interrupted cylindrical jacket 80, which extends partially over the length of the sleeve 10,11. Figure 10 (left half) shows a cylindrical jacket 80.1 which can be penetrated into the end face of the sleeve 11. Figure 11 shows a pin 34.2 with a support means in the form of a pressure body 82, which is supported on the end face of the sleeve. The pressure body 82 is held by a spring 83. FIG. 12 shows a pin 34.3, the stiffening of which was inspired by a bottle stopper. Elastic rings 84 on a pin 85 expand on the inside of the sleeve, while extensions 86 on pin 85 are supported on the end face of the sleeve 11. The pin 85 has an annular recess 87 and a spring element 89 which interacts with a square 90 of a bolt 91 which is fixedly but rotatably connected to the pin holder 68 in such a way that the Spring element 89 rotates the square 90 and thus the bolt 91 by 90 degrees when the pin 85 is moved upward. In this way, the pin 85 can be locked and unlocked. A modification is shown in FIG. 13, where the bolt 91.1 is fastened to the pin 85 and the spring element 89.1 to the pin holder 68.

FIG. 14 shows a completely different flyer doffing device 20.1, where different parts are shown superimposed. Here, the carrier 21.1 (shown twice) is separated from the fixed or immovable transit bar 95. In a profile support 23b, a sliding block 55.1 can be moved vertically by means of, for example, the screw rod 57. The movement path 15b is articulated and adjustable by means of a hydraulic or pneumatic cylinder 96 with the sliding block 55.1. The carrier 21.1 can be moved on this movement path 15b, which can be pivoted into a vertical movement path 15a, by means of a sliding or rolling element 97 and a cylinder 63.1. Additional holding means in the form of inflatable cuff grippers 99 are arranged on both sides of a holding beam 101 and cooperate with the pins 34 of the transit beam 95. For the construction of the grippers 99 and for the type of attachment to the beam 101, EP-OS 303 877 (US Pat. Registration 07 / 233,564). The bar 101 can either be fixed in the longitudinal direction of the flyer (FIG. 15, right half) or displaceable by at least half a division 36 (FIG. 15, left half). In the latter case, the longitudinal displacement device can have a toothed rack 103 on the beam 101 and a driven pinion 104 on the holding arm 105. Both empty sleeves 11 and full sleeves 10 can be gripped with the grippers 99. The same or the dop number of grippers may be provided (the additional grippers 99.1, which are somewhat smaller because of the space available, are shown in dashed lines in FIG. 15), always based on the number of spindles 13 on the carriage 6. In the case of a double number of grippers 99.99.1 separate air lines 107,107.1 are necessary.

An mode of operation will now be explained with reference to FIGS. 14 and 19:
The carrier 21.1 runs empty, first along the path 15a, then along the path 15b, takes the full sleeves 10, the grippers 99 being guided over the sleeves from above, and places them on the clipboard 49. Subsequently, the empty carrier 21.1 the empty sleeves 11 from the transit bar 95, the grippers 99 being guided over the sleeves from below. It should therefore be noted that the dimension of any flange on the underside of the sleeve may have to be reduced. The empty sleeves 11 are again brought into the inclined position via the path 15a and the inclined path 15b and placed on the spindles 13. The full sleeves 10 are then guided from the intermediate storage 49 to the transit bar 95 during a vertical upward movement. Any longitudinal displacements are unnecessary here.

Another mode of operation is shown in FIG. 20. It is carried out analogously to the description of FIG. 18. FIG. 21 with a further mode of operation still requires a little explanation, as follows:
The carrier 21.1 moves empty into the inclined position, fetches the full sleeves 10 and transfers them to the transit bar 95. Essentially simultaneously with the downward movement handing over the full sleeves 10, the empty sleeves 11 are received.

It should be clear that the mode of operation shown in FIG. 17 can be easily carried out with the device 20 (FIG. 1) if the web 15b is pivotally connected to the web 15a instead of being fixed.

A comparison has been made in FIGS. 16 to 21 for a clearer understanding. It should be noted that, apart from the horizontal connecting lines which do not represent any movements, a solid line represents the transport of empty sleeves 11 and a solid line with crossbars represents the transport of full sleeves 10. A dashed line means that the carrier 21, 21.1 or the converter 106 (FIG. 16) is moved without sleeves.

• 1.1 Ist der Transitbalken mit dem Träger 21 inte­griert?
• 1.2 Was ist die Anzahl der Haltemittel bzw. Zapfen 34 am Träger 21? (Die Anzahl bezieht sich auf die der Spindeln 13 am Wagen 6)
• 1.3 Ist der Träger 21,21.1 in der Schrägstellung um eine halbe Teilung 36 längsverschiebbar?
• 2.1 Ist der Transitbalken 95 vom Träger 21.1 getrennt?
• 2.2 Was ist die Anzahl der Haltemittel bzw. Greifmanchetten 99,99.1 am Träger 21.1?
• 2.3 Was ist die Anzahl der Zapfen 34 am Transit­balken 95?
• 3.1 Ist eine Zwischenablage 49 nötig?
• 3.2 Was ist die Anzahl der Aufsteckzapfen auf der Zwischenablage 49?
• 3.3 Ist eine Längsverschiebung der Zwischenablage nötig?

Fig. 16 17** 18 19 20 21 1.1 ja ja ja nein nein nein 1.2 gleich gleich doppelt - - - 1.3 nein unnötig* ja nein ja unnötig* 2.1 nein nein nein ja ja ja 2.2 - - - gleich doppelt doppelt 2.3 - - - gleich gleich doppelt 3.1 ja ja nein ja nein nein 3.2 doppelt doppelt - gleich - - 3.3 ja nein - nein - - * Die Längsverschiebung findet in der horizontalen Stellung statt. ** Es ist viermal eine Längsverschiebung notwendig. The following points are considered:

• 1.1 Is the transit bar integrated with the carrier 21?
• 1.2 What is the number of holding means or pins 34 on the carrier 21? (The number refers to that of the spindles 13 on the carriage 6)
• 1.3 Can the beam 21, 21.1 be moved longitudinally in the inclined position by half a pitch 36?
• 2.1 Is the transit bar 95 separated from the carrier 21.1?
• 2.2 What is the number of holding devices or gripping cuffs 99.99.1 on the carrier 21.1?
• 2.3 What is the number of pins 34 on the transit beam 95?
• 3.1 Is a clipboard 49 necessary?
• 3.2 What is the number of pegs on the clipboard 49?
• 3.3 Is a longitudinal shift of the clipboard necessary?

Fig. 16 17 ** 18th 19th 20th 21st 1.1 Yes Yes Yes No No No 1.2 equal equal double - - - 1.3 No unnecessary* Yes No Yes unnecessary* 2.1 No No No Yes Yes Yes 2.2 - - - equal double double 2.3 - - - equal equal double 3.1 Yes Yes No Yes No No 3.2 double double - equal - - 3.3 Yes No - No - - * The longitudinal shift takes place in the horizontal position. ** A longitudinal shift is necessary four times.

Claims (13)

1. A method for the automatic replacement of full by empty sleeves on a flyer, whereby full sleeves are inclined from their vertical operating position, raised in their inclined position and brought into a vertical position, whereby empty sleeves are inclined from a vertical position, lowered in the inclined position and are brought into their vertical operating position, and using a device separate from the flyer, characterized in that
all full sleeves are brought together from the inclined position by means of a carrier of the device and that all empty sleeves are brought together into the inclined position by means of the carrier. 2. The method according to claim 1,
characterized in that subsequent
the empty sleeves are temporarily stored on a shelf downward from their vertical transport position according to a vertical movement path by means of the carrier,
the empty carrier is brought into an oblique path of movement to accommodate the full sleeves,
- the full sleeves are also temporarily stored on the shelf,
- The empty sleeves from the storage in an inclined position, and
- the full sleeves from the shelf vertically be brought into their vertical removal position (Figure 17). 3. The method according to claim 1,
characterized in that
the empty sleeves are lowered by means of the carrier from their vertical transport position into empty spaces between the full sleeves inclined from their operating position,
- the full sleeves are gripped by the wearer,
the carrier subsequently carries out a lifting movement in the inclined position with the full and empty sleeves in order to remove the full sleeves from their spindles,
- Then the sleeves on the carrier are moved longitudinally by half a division, and
- The carrier then executes a lowering movement in the inclined position (Fig. 18, 20). 4. The method according to claim 1,
characterized in that subsequent
the empty carrier is brought from a vertical into an oblique path of movement in order to take up the full sleeves,
- the full sleeves are temporarily stored on a shelf,
- The empty sleeves by means of the carrier from their vertical transport position for placement on the spindles in an inclined position, and
- The full sleeves are moved vertically upwards from the rack into their vertical removal position (FIG. 19). 5. The method according to claim 1,
characterized in that subsequent
the empty carrier is brought from a vertical into an oblique path of movement in order to take up the full sleeves,
- brought the full sleeves into their vertical removal position,
- The empty sleeves are gripped by the carrier in their transport position, and
- For placement on the spindles, the empty sleeves are brought into an inclined position. (Figure 21). 6. Device for performing the method according to claim 1,
with a flyer that has a spindle (13) for sleeves (10, 11) that can be tilted into an inclined position (6), and with a device (20, 20, 1) that is separate from the flyer and that has a holding means (34, 99) for the sleeves, downwardly movable carrier (21, 21.1), which extends over the full effective length of the flyer, characterized in that
the carrier is movable between a vertical movement path (15a) and an inclined movement path (15b) corresponding to the inclination of the carriage. 7. Device according to claim 6,
characterized in that
the carrier (21, 21.1) can be moved on at least two slide rails (22) and that each slide rail has a vertical movement path and an inclined movement path, the inclined movement path being either fixed or pivotable the vertical trajectory is connected. 8. Device according to claim 7,
characterized in that
the carrier (21, 21.1) can be moved on the vertical movement path by means of a form-fitting drive means (57) and on the inclined movement path by means of a link rod (62, 63) which can be lengthened if necessary. 9. Device according to claim 6,
characterized in that
the holding means (34) can be guided by a rigid guide device (69), at least in the longitudinal direction of the flyer. 10. Device according to claim 6,
characterized in that
the holding means (34) has at least one support means (80, 80.1) which extends partially over the length of the sleeve (10, 11) or (82, 86) which is supported on the end face of the sleeve. 11. Device for the automatic exchange of full by empty sleeves on a flyer, with a device (20.1) separate from the flyer, which has a holding means (99,99.1) for the sleeves, which extend over the full length of the flyer and can be moved downwards (21.1) and a transit bar (95),
characterized in that
for the delivery of empty tubes in their transport position to the carrier and for the acceptance of full tubes in their transport position Transit bar serving from the carrier is immovably arranged and that both the transit bar and the carrier have holding means (34.99.99.1) for the sleeves. 12. Device according to claim 11,
characterized in that
the carrier (21.1) has pneumatically actuated holding means (99.99.1). 13. Device according to claim 12,
characterized in that
the carrier is displaceable in the longitudinal direction of the flyer and that separate air lines (107, 107.1) are provided for the holding means (99) and for the additional holding means (99.1).

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