EP0419968A1 - Manipulation of strand packages or strands in a spinning machine - Google Patents
Manipulation of strand packages or strands in a spinning machine Download PDFInfo
- Publication number
- EP0419968A1 EP0419968A1 EP90117733A EP90117733A EP0419968A1 EP 0419968 A1 EP0419968 A1 EP 0419968A1 EP 90117733 A EP90117733 A EP 90117733A EP 90117733 A EP90117733 A EP 90117733A EP 0419968 A1 EP0419968 A1 EP 0419968A1
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- EP
- European Patent Office
- Prior art keywords
- strand
- creel
- package
- spinning
- machine
- 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.)
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- 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
- D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
- D01H9/005—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving
Abstract
Description
- The invention relates to an apparatus and a process for manipulating feed packages or feed strands in a spinning machine, and to a spinning machine with such apparatus.
- The invention is intended in particular for use in connection with apparatus according to our European patent application No. 90106217.4 of 31 March 1990 ("Transporting packages of spinnable strand in and to the creel of a textile machine"), and the corresponding PCT application No. PCT/EP90/00517. However, the invention can also be applied in combination with other equipment.
- The automation of the ring spinning machine has been taken up in earnest in recent years. Proposals for piecing of a yarn following a yarn break have been discussed in technical circles for many years, see for example the article "Progressing automation of the ring spinning process" on
pages 13 and 14 of the December 1984 edition of "Textilbetrieb". These ideas have now been supplemented by proposals for exchanging empty feed packages with full feed packages in the creel (for example in accordance with DOS 35 36 702 or DOS 35 37 727, or in accordance with a EP 259 267 orEP 258 188). Further proposals have been put forward for threading a feed strand into a drafting arrangement while the latter remains operative (for example in accordance with DOS 36 26 268, or EP 310 906 or EP 213 962). - All of these various functions should be carried out by robots of one sort or another. However, the question then arises - how can all these robots be provided within the limited space available at a single machine.
- This invention is based upon the recognition of two facts:
- 1. neither a package manipulation device (for example a robot in accordance with DOS 35 36 702) nor a strand manipulation device (for example a robot in accordance with DOS 36 26 268) is occupied for one hundred per cent of its operating time with package or strand manipulation on a single machine;
- 2. the creel of a spinning machine can be served by a robot from within or from above the creel itself without difficulties (for example as already shown in US-PS 4,473,997) and this leaves space free along the sides of the machine for servicing of spinning positions (for example by means of a piecing robot).
- The invention therefore foresees a travelling device for manipulating (handling) of strand packages or of strands at a spinning machine. The spinning machine can be a ring spinning machine or another type of spinning machine having a spinning position fed by strand packages.
- The device in accordance with the invention is characterised in that it is provided both with means for introducing a new strand package into the creel and also with means to make a strand end ready for introduction into a spinning position.
- The spinning position can comprise a drafting arrangement so that the introduction of the strand into the spinning position necessitates threading of the strand into the drafting arrangement.
- The device can preferably travel on at least one rail in the creel or above the creel so that in performing its function the means for making ready of the strand end extends downwardly or laterally from the device into the creel. The device is preferably provided with two different means, one of the said means being adapted for introducing of a package into the creel and the other being adapted for making ready of a strand end. However, it would be possible to design a single (complicated) means suitable for performing both of these functions.
- The means for making ready of a strand end can be arranged to introduce the strand into a joining device so that this device operates at a suitable point of time to join the new strand with a strand already running to the spinning position, for example in accordance with our European patent application No. 296 546. This means could, however, also be designed to thread the strand into a continually running drafting arrangement (for example in accordance with DOS 36 26 268 or EP 310 906). Alternatively this means can be provided with a strand piecing device (for example in accordance with EP 213 962 or DOS 38 02 414) so that the device itself forms a suitable join between the new strand and the strand already running to the spinning position.
- In the latter case, the machine is preferably provided with a sensor system in order to determine the appropriate point of time for the join to be made, and with an indicating means to indicate that this point of time has been reached. The sensor system can be formed in accordance with our German patent application No. 39 00 507 or in accordance with DDR-PS 252592.
- The travelling device can be provided with its own sensor means to recognise the indication provided by the machine. However, communication means could be provided to enable transfer to the travelling device of a signal regarding the necessity for a strand joining operation at an identifiable spinning position.
- Where threading of the strand into a spinning position is carried out after a thread break has occurred, the strand may be threaded into a drafting unit of the spinning position in preparation for a subsequent yarn piecing operation performed by a separate robot.
- Embodiments in accordance with the invention will now be explained in further detail with reference to the drawings, in which:
- Figure 1 shows a plan view of a ring spinning machine with a travelling service device and a transport trolley in accordance with our European patent application No. 90106217, which devices are to be adapted in accordance with the present invention,
- Figure 2 shows a plan view to a larger scale of the travelling device and the trolley as shown in Figure 1 and according to a first embodiment of application No. 90106217,
- Figure 3 shows a section taken on the line I-I of Figure 2,
- Figure 4 shows a section taken on the lines II-II of Figure 2,
- Figure 5 shows a plan view to a larger scale of the travelling service device and of the trolley as illustrated in Figure 1 but according a second embodiment of application No. 90106217,
- Figure 6 shows a plan view of packages located on creel paths in the creel of a ring spinning machine with sensor means for detecting the conditions of the packages,
- Figure 7 shows a side view of part of a travelling service device with sensors for detecting the condition of a package,
- Figure 8 shows a section taken on the lines III-III of Figure 5,
- Figure 9 shows a vertical section of part of a ring spinning machine with a travelling service device and a trolley in accordance with a third embodiment of application No. 90106217,
- Figure 10 shows a perspective view of one half of a package support rail as shown in Figure 9,
- Figure 11 is a copy of Figure 8 of our European patent application no. 89123852 of 22 December 1989 (title "Manipulating device for piecing yarn"), the device in accordance with application No. 89123852 being used in accordance with this invention to adapt the equipment in accordance with application No. 90106217,
- Figure 12 is a copy of Figure 9 of European patent application No. 89123852 (which corresponds with PCT patent application No. PCT/EP89/0160,
- Figure 13 is a copy of Figure 10 of European patent application No. 89123852,
- Figure 14 shows a modification of the suction system illustrated in Figure 8,
- Figure 15 shows a schematic cross-section through a ring spinning machine and creel illustrating some of the features previously illustrated in our European patent application No. 90106217 together with additional aspects relevant to this development,
- Figure 16 shows a diagrammatic section through one side of a creel of a ring spinning machine with a combined package transfer and strand handling robot according to this invention, and
- Figure 17 is a modified version of Figure 1 of US patent No. 4,922,704.
- Figure 15 shows in longitudinal elevation a
ring spinning machine 220 supported byfeet 222 on thefloor 224 of the spinning room. The machine comprises a frame work made up of transverse supports ("Samsons") 226 carrying longitudinal elements which extend along the whole length of the machine. The machine is symmetrical about a central longitudinal plane CP that is, the machine is "double-sided" with two rows of spinning positions facing outwardly in opposite directions from this central plane. Each spinning position comprises adrafting section 228 andspindle unit 230 withthread guiding elements 232 between the drafting section and the spindle unit. Each spinning position can be of generally conventional construction, and is therefore illustrated only in general outline in Figure 15 without any detail. - Suitable drive arrangements are provided for both the
drafting section 228 and thespindle unit 230. The machine also comprises a pneumatic system including asuction channel 234 extending longitudinally thereof and having branch tubes (not shown) communicating with respective spinning positions to collect waste material therefrom. At each end of the machine there is an appropriate end head in which working elements common to all spinning positions of the machine (for example centralised drive, control and pneumatic systems) are located. One such end head is indicated in outline at 235 in Figure 15. - A modern machine will normally be provided with an automatically operating doffer for removing completed yarn packages from the
spindle units 230 and replacing them with fresh tubes ready for winding of new yarn packages. Such a doffing mechanism is indicated at 237 in a "packed away" condition. The doffing mechanism remains in this condition during normal spinning operation, but must be extended outwads and upwards for a doffing operation. Since the latter is not affected by this invention, the extended condition of the doffer is not shown. - A modern ring spinning machine includes a large number of spinning positions, for example 1000 to 1200 such positions equally divided between the two rows on opposite sides of plane CP. Service personnel or a service tender for tending the individual spinning positions can stand (be supported) on
floor 224 and can move freely along the machine with good access to the individual spinning positions. A spinning position servicing tender is shown in general outline at 239. Details of such tenders can be seen from European patent application No. 90106217, but this invention is not restricted to use in combination with service tenders of that kind. - Material to be spun in the spinning position is provided from a so-called
creel 236 supported byvertical posts 238 firmly secured in the machine frame. Thecreel 236 comprisestransverse supports 248, there being onesuch support 240 for each pair of adjacent spinning positions. Thesupports 240 extend outwardly in a form of cantilever beams from the central supports posts 238 so that eachsupport 240 has a free outer end. In a conventional ring spinning machine, eachsupport 240 normally carries twosuspension devices 242 on whichroving tubes 244 are suspended to hang freely from therespective suspension device 242. When it is first mounted in thecreel 236, eachtube 244 carries apackage 246 of roving to be spun in a respective spinning position associated with that particulartransverse support 240. Roving withdrawn from this package is passed over suitable guides, for examplelongitudinal guide rods 248 mounted on the support posts 238, so as to run from the respective packages over the associated guides into theindividual drafting sections 228. The run of roving has been omitted from Figure 15 in order to maintain clarity of the overall illustration and because this arrangement is well-known to the man skilled in the spinning art. - This specification refers to "roving packages", that is packages of slightly twisted strand prepared on a roving frame. However, the invention is clearly not limited to machines based on a roving feed. Ring twisting machines for example, take yarn packages as infeed.
- In order to maintain the service area immediately adjacent the spinning positions clear, the creel is normally disposed so that the suspended packages are held above head height for service personnel or above any region which has to be crossed by a service tender.
- In accordance with the principles broadly disclosed in the European patent application no. 88116282 and European patent application No. 89101255, the
conventional supports 240 can be converted into transverse paths along which roving packages and/or package tubes can be moved to and from a delivery system transporting the packages and/or tubes to and from the ring spinning machine. This has been indicated diagrammatically in Figure 15 by dotted line modifications of the conventional arrangement. These modifications include a central conveying region immediately adjacent the plane CP. In this central conveyingregion 250, empty tubes (or at least almost completely unwound packages 252) can be conveyed longitudinally of the machine. On an outermost conveyingpath 256,packages 254 newly delivered to the machine can be moved around the machine or at least along each longitudinal face thereof. Eachtransverse path 240 can be extended as indicated in dotted lines at 258 to provide space for a reserve position such that a newly deliveredfull package 254 can be moved from the outermost conveyingpath 256 into a reserve position of an individual transverse path while the working positions (illustrated in full lines) are still occupied by at least partially wound packages delivering strand to the respective spinning positions. - Arrangements for performing the various transverse movements immediately described above are the subject of European patent application No. 90106217. For the sake of completeness of the current disclosure, those arrangements will subsequently be described in outline with reference to Figures 1 to 9 of the drawings.
- Figure 1 shows an
overhead transport rail 5 which leads from aroving frame 6 via apoints system 7 into a respectiveoverhead rail 11 encircling aring spinning machine 10. Theoverhead rail 11 extends along both longitudinal sides of themachine 10. The machine comprises adrive head 13 andsecond end housing 12 with spinning positions (not illustrated in Figure 1) in two rows along respective longitudinal sides of themachine 10. The machine further comprises a creel provided above the spinning positions and includingcreel paths 16 in the form of rails which are arranged (when viewed in plan) at right angles to the centrallongitudinal plane 17 of the machine. Therails 17 are preferably horizontal but can also have a small angle to the horizontal in the vertical plane. - Each rail leads through the operating or working positions of the packages for the associated spinning position. There are two such positions, namely the
first operating position 18 and thesecond operating position 19. Each rail also leads through areserve position 20. It would of course be possible to provide one points device for each machine side. In this case, two different overhead transport rails could be provided for the respective longitudinal sides of thering spinning machine 10. - A carrier train or trolley 23 (made up of units connected by suitable couplings) brings
full packages 24 from theoverhead transport system 5 onto theoverhead rail 11 associated with the machine. The train ortrolley 23 can be driven on thesystem 5 and/or on therail 11 by means of a drive motor, a friction roller drive or by means of a chain drive (for example in accordance withDOS 37 28 843). Eachpackage 24 has its own associatedsupport element 25 with which thepackage 24 remains in association throughout the operation to be described in this specification. Eachsupport 25 has a pair of limbs 85 (Figure 3) defining an opening to receive arail 16 and each having a free end. The free ends oflimbs 85 together form a releasable connection with an inverted U-shapedintermediate portion 26 fixedly connected with thetrolley 23. - The creel rails 16 are not joined continuously by stationary points devices with the encircling
rail 11. Instead, a travellingtransfer device 29 is provided which is adapted to move packages along acreel rail 16 and "simultaneously" (as part of the same transfer operation) to transfer a newfull package 24 onto the same creel rail. Thetransfer device 29 can travel in the region above the creel rails 16 on itsown guide rails 30, being supported by means ofrollers 31. Thetransfer device 29 may or may not be self driven, but it will include at least means for performing a transfer function for transferring packages into and through the creel in a direction towards the centrallongitudinal plane 17. - In the region of the
latter plane 17 there is a receiving path or anintermediate storage belt 32 with support pins 33. A suitable belt arrangement is separately described in our PCT patent applications PCT/EP89/01098 and PCT/EP89/1097, each based upon Swiss patent application No. 3547/88. - When a package at
position 18 becomes empty through supply of its strand to an associated spinning position, the transfer device not only transfers a newfull package 24 from thetrolley 23 onto theappropriate rail 16 but also transfers almost simultaneously the packages already present on that rail atpositions plane 17. This transfer operation is carried out in such manner that the empty package atposition 18 is transferred from therail 16 onto one of the support pins 33 of the stationaryintermediate storage belt 32. The direction of movement of the packages on therail 16 is illustrated in Figure 1 by means of arrows. At least one creel path or rail 36, which is disposed parallel to therails 16 of the creel, serves to return the empty packages from the receivingbelt 32 back to thecarrier train 23. The arrow indicating the direction of movement on thisrail 37 therefore points in the opposite direction to the arrows indicating movements on the creel rails 16. Of course, reversal of all directions of movement is possible, as is described in our co-pending European patent application No. 90106900 of 10 April 1990 entitled "Package conveying system" (corresponding with PCT patent application No. PCT/EP90/00558). - The mode of operation will now be described with reference to Figures 2, 3 and 4:
- The
transfer device 29 is dragged along by thetrolley 23 by means of adrag lever 38 which engages on theintermediate portion 26.Trolley 23 andtransfer device 29 are moved in the direction of the arrow A. Aninitiator device 39 in the form of a pivotable lever moves with only a low degree of play along the outer ends of therail 16. When a package change operation is to be carried out, a machine operator performs an operation, e.g. pivots the reserve package atposition 20 slightly, so that a bar orrod 40 springs out of the end of the rail. This bar orrod 40 operates theinitiator device 39. - Operation of the
initator 39 sets amotor 43 in operation causing rotation of aneccentric disc 44 and motion of arod 45. By means of a slidingguide 46 theconnector rod 45 causes pivotable movement of abody 49 around a threadedspindle 50. This pivotable movement ofbody 49 continues until the body comes into engagement with theflange 51 and possibly theupright 52 of therail 16. It is advantageous to arrange for variable speed of rotation of the drive to thetrolley 23 so that after theinitiator 39 has been operated the drive can be switched into a crawl gear. This reduces or prevents a disturbing swinging of the packages on thetrolley 23. - After the
body 49 has come into engagement with therail 16, atransfer motor 55 is activated and rotates the threadedspindle 50 by way of achain 56. Thebody 49 is thereby moved in a direction towards the centrallongitudinal plane 17 of the machine.Body 49 is provided with apusher rod 57 which in the illustrated case is fitted with threegrippers 58. Thesegrippers 58 come into engagement with thesupports 25 and move the packages carried by the rail along that rail. In the course of this movement, the package previously atposition 18 passes from therail 16 onto asupport pin 33 on the central belt, and thereserve position 20 becomes empty. The package previously at workingposition 19 is moved inwards into workingposition 18 and the package previously at thereserve position 20 is moved into workingposition 19. - The
carrier train 23 is still engaging (via the intermediate part 26) with the springbiased drag lever 38 and is pushing the latter into the position illustrated in dotted lines. Motion of thedrag lever 38 into the dotted line position moves thefront support 25 on the trolley past a transfer head 61 on a dog-leg lever 62 pivotally mounted on thetransfer device 29. In order to enable this movement, transfer head 61 is itself held by means of a spring bias (not shown) on thelever 62. Whendrag lever 38 reaches the dotted line position, thefront support 25 is taken up by a curvedintermediate rail section 63 which is fixedly mounted on thetransfer device 29 and is aligned at this time with therelevant rail 16. - When this stage has been reached, a further, pivotally mounted
transfer motor 64 is activated and swings the dog-lever 62 by means of a threadedspindle 65. The swinging movement oflever 62 causes movement of thefront support 25 together with apackage 24 carried thereby along theintermediate rail section 63 and onto therail 16 aligned therewith. Movement of thesupport 25 continues until it occupies thereserve position 20. Thebody 49 is still resting in engagement with therail 16. - After the
pusher rod 57 has moved all packages previously at thepositions creel rail 16, thebody 49 is pivoted slightly upwards and is moved in a direction away from the longitudinalcentral plane 17 of the machine. This slight upward pivotal movement enables return movement of thegrippers 58. During this return movement, the body 14 remains in engagement with theflange 51 of therail 16. This is enabled by providing theflange 51 and the engaging portion of thebody 49 with thesame radius 68.Pusher rod 57 could also be formed with a telescoping spring-bias structure if a predetermined sequence of operating times is required for thegrippers 58. -
Drag lever 38, which is provided with aroller 69 running on acurved guide 70 having a curved end section, is still pressed by a spring force from thetrolley 23 in the direction of the arrow A. Asroller 69 moves onto the curved section ofguide 70 the drag lever pivots in a direction towards the central longitudinal plane 17 (away from the trolley 23) and enables further travel of the intermediate part 26 (that is, of the carrier train 23). The spring force then moves thedrag lever 38 back into the position illustrated in full lines and the succeedingintermediate portion 26 carrying afull package 24 comes into engagement with thedrag lever 38 due to the movement of thecarrier train 23. By this means, thetransfer device 29 slides backwards relative to thetrolley 23 through one spacing on the trolley ortrain 23. When thelast package 24 has been transferred to arail 16, then the transfer device remains stationary relative to the ring spinning machine. The way in which theempty packages 18 can be transferred from theintermediate storage band 32 back to thetrolley 23 is also shown in our European patent application No. 90106900. - The
limb 71 of thedrag lever 38 which engages theintermediate portion 26 of the trolley has a length such that thetrolley 23 together with thetransfer device 29 coupled therewith can travel easily and without tipping around thecurves 72 of therail 11 encircling the machine. - All movement sequences involved in the transfer operation, that is shifting of the
package 24 via the intermediatecurved rail section 63, lowering and then pivoting upwards of thebody 49, displacement of the packages on therail 16, and the return movement of thegrippers 58, are controlled by electrical means and carried out by electromechanical means. These sequences are therefore independent of the movement of thecarrier train 23. Accordingly, it is possible to hold thetrolley 23 stationary during the package exchange operation. Coordination of the various movement sequences is ensured by amicroprocessor 75. Electrical current is provided to thetransfer device 29 by means of a slidingcontact 77 engaging one or morecurrent buses 76. - Figure 5 shows a second embodiment of
transfer device 29 which in this case is formed as a locomotive for the train. The device is self-drivable by means of amotor 81 coupled with at least oneroller 31. Electrical current is provided to all motors arranged on the locomotive 29 from anaccumulator 82 which can be periodically recharged by means of a chargingstation 83 arranged at one of the curved ends 72 of the encirclingrail 11. - Furthermore, in this embodiment, the curved
intermediate rail section 63 of Figure 2 is replaced by a straightintermediate rail section 84. This straightintermediate section 84 can be made superfluous provided that either therail 16 of the creel can be extended or that the encirclingrail 11 for thesupport train 23 can be arranged very close to the ends of the creel rails 16. In either case, the creel rails 16 extend into the immediate neighbourhood of thecarrier train 23. - The supports 25 have (as regards the section made up by the limbs 85) an orientation rotated through 90 degrees relative to the first embodiment (compare Figure 3 with Figure 8). In an embodiment in accordance with Figure 2, the longitudinal axis of the
support 25 undergoes a change of direction in the course of a transfer movement from thecarrier train 23 onto arail 16. This change of direction of thesupport 25 is unnecessary in the case of an embodiment in accordance with Figure 5. This simplifies the return of the empty packages from the receivingpath 32 via therail 37 onto thecarrier train 33. - The
pusher rod 57 is now provided with fourgrippers 58 and the movement sequence is simplified. In the course of a linear movement, the packages on therail 16 are displaced in the direction of the centrallongitudinal plane 17 of the machine, and also thepackage 24 aligned with thisparticular rail 16 is shifted from thecarrier train 23 onto therail 16. The inner package initially atposition 18 passes from therail 16 onto a receivingpin 33 on the central receiving path. The sequence is reversed in the case of return of empty packages. In the latter case, a linear movement occurs from the receivingpin 33 of the central conveying path via therail 37 onto thecarrier train 23. Accordingly, thelocomotive transfer device 29 can also be used for the return of packages onto thecarrier train 23. It is therefore unnecessary to provide an additional package returning means for this purpose. - The initiating device 95 (Figure 6) in this case is in the form of a sensor having a sensing field corresponding to the length of a package supporting tube and it responds to the presence of the
strand 99 in this sensing field. As another possibility, asensor 100 can be provided to respond to the presence of thestrand 96. In another form of initiator based on sensing means, sensors 101 (Figure 7) are provided, preferably as a pair, to detect the dimensions of the strand body remaining in the innermost package (at position 18). - An effective operating procedure is as follows. The locomotive 29 alone (without the carrier train 23) travels along its guide rails and detects by means of the
sensors microprocessor 75 and passed to a central control (not shown). The central control can then direct acarrier train 23 from theroving frame 6 via thetransport rail 5 onto theappropriate rail 11 encircling the relevant ring spinning machine. In accordance with a further possible stage of the procedure, the locomotive ortransfer device 29 is coupled to the front end of thecarrier train 23 at the first creel rail 16 (as viewed from the points device 7) at which a package change operation is required. This coupling can be formed by means of a non-illustrated entrainment lever or means of agear wheel 98.Packages 24 of thecarrier train 23 can then be transferred sequentially onto those creel rails 16 which have already been identified as in need of a package change operation and have been stored in themicroprocessor 75. - At the time of transfer of the
last package 24 carried by thecarrier train 23, the transfer device can transmit a signal to the control center indicating that thetrain 23 no longer carries anyfull packages 24. The return of packages to the train can then be initiated, again from the control center. For this purpose, thelocomotive transfer device 29 is guided to thereturn creel rail 37 and theintermediate storage belt 32 is set in motion. - In order to avoid the necessity of setting the
carrier train 23 into motion each time a package exchange operation is required, with the associated necessity to establish alignment with thecreel rail 16 on which the operation is to be carried out, an alternative procedure can be adopted. In accordance with this procedure, thecarrier train 23 with, for example, approximately sixtypackages 24, can be guided via thepoints device 7 onto the encirclingrail 11 and can be positioned in alignment with the first sixty creel rails 16 (viewed from the points device 7). Thetransfer device 29 with the stored data regarding creel rails 16 upon which a package exchange operation is required can now extract thosepackages 24 from thecarrier train 23 lyingopposite rails 16 upon which a package exchange operation is necessary. As soon as this section of sixtycreel rails 16 has been serviced, thetransfer device 29 acting as a locomotive can move the carrier train along the machine to the next following section of sixty creel rails. - It will be clear that the
carrier train 23 no longer carries a continuous row ofpackages 24. However, this is unlikely to prove a major disadvantage because thesensor 91 of the locomotive 29 can automatically locate thepackages 24 on thecarrier train 23 in passing the train. The locomotive 29 therefore services within this second section all of thoserails 16 which are currently aligned with afull package 24 on thetrain 23. In the event that arail 16 happens to be aligned with an empty location on thecarrier train 23, the locomotive 29 can displace thetrain 23 by means of thegear wheel 89 until afull package 24 lies opposite therelevant rail 16. - A further embodiment of the transfer device is illustrated in Figure 9. The supports for packages are here formed as cylindrical elements 25.1. The creel rails 16.1 each consist of two
yokes 105 arranged at a small spacing such that theshaft 106 of the supports 25.1 can be moved along between a pair ofyokes 105. Eachyoke 105 is provided withrecesses 107, the recesses of a pair ofyokes 105 together corresponding to the section of the cylindrical supports 25.1. Further, the holders for thepackage 24 on thecarrier train 23, and the holders for thepackages 24 on the receiving belt 32.1 are correspondingly formed as forked elements. - Both runs of the receiving belt 32.1 are arranged to one side of the central
longitudinal plane 17 of the machine. This forms an example of a package exchange arrangement which is associated with one longitudinal side of thering spinning machine 10. The locomotive transfer device has ayoke 110 on which grippers 58.1 in the form of Casablanca pins are secured. Alternative possibilities involve for example magnets. In the most suitable arrangement, theyoke 110 and the grippers 58.1 grasp the supports 25.1 centrally. In the course of introduction of thepackages 24 onto the creel rails 16.1, the packages already on the rail atpositions - The means 111 are provided in a shifting body 49.1. By rotation of the threaded
spindle 50, the packages are shifted through one step in the direction of the centrallongitudinal plane 17 of the machine (position B) and are lowered (position C). The lowering movement causes release of the packages by the grippers 58.1. The packages are therefore transferred in a series "jumps" along the creel rails 16.1. The return of the empty packages can in this case also be carried out by means of the locomotive transfer device. - Of course, it is also possible to drive both the
transfer device 99 and thecarrier train 23. In any event, movement commands can be transmitted to the trolley drive by way of thetransfer device 29 which is supplied with electrical current. - It is believed that the arrangements in accordance with European patent application No. 90106217 will be adequately clear from the above outline description. Further detail can be obtained from the relevant European application itself. A thread manipulating robot in accordance with European patent application No. 89123852 will now be disclosed in outline with reference to Figures 11 to 13.
- In the following sections of this specification, selected elements of a manipulating or handling device in accordance with our European patent application No. 89123852 will be described with reference to Figures 11, 12 and 13. The elements in question are those important to convert a package transfer robot in accordance with the preceding Figures into a robot in accordance with the present invention. These elements comprise a pivoting system and suction system. When the description of Figures 11 to 13 has been completed, modifications to enable adaptation of the manipulating or handling robot to a transfer robot in accordance with European patent application No. 90106217 will be described.
- The suction system comprises a source of underpressure (not illustrated here) which in a system according to European patent application No. 89123852 is mounted on a chassis of a piecing robot. In adapting a transfer device according to European patent application No. 90106217, the source of underpressure will be mounted upon the chassis of the transfer device in accordance with the latter application.
- The suction system further comprises a storage tube 134 (Figure 11) which is connected to the source of underpressure and is fitted with a
mouth portion 136.Mouth portion 136 of the suction system is preferably formed by a rigid element for example ametallic tube 166. Thisrigid part 166 can be held in aholder 168 so that the movements of themouth 170 are clearly defined by the corresponding movements of theholder 168. Thestorage tube 134, on the other hand, should be formed as a flexible tube, for example being formed of flexible plastics material. Thestorage tube 134 can therefore be connected both with the source of underpressure and with themovable part 166, and can adapt itself to the movements of the latter part without prejudicing the precision of the definition of those movements by the control program. - The suction effect exerted from the source of underpressure in the
storage tube 134 should be able to hold a predetermined length of fibre strand in a kink-free manner within the suction tube. On the other hand, the suction effect must allow the strand to be drawn out of the suction tube in the course of a piecing operation or a strand manipulating operation as will subsequently be described. - The pivoting system preferably comprises rigid elements connected together by pivot axes. The
holder 168 is supported by afirst arm 172 which is connected by apivot axis 174 with asecond arm 176. Thepivot axis 174 is preferably arranged horizontally as will be apparent in particular from the plan view in Figure 10 and the side view in Figure 12. Thepivot arm 172 is rotatable about theaxis 174 by means of a motor (not shown) supported by thesecond arm 176. This motor can be controlled by means of the control program to move the mouth portion 136 (Figure 11, not shown in Figures 12 and 13). - The
holder 168 must also be able to rotate about a vertical axis. This vertical axis 178 (Figure 12) is located between thesecond arm 176 and two support plates, namely anupper plate 180 and a lower plate 182 (Figure 12). These two support plates are connected with afurther plate 184 to form a raisable andlowerable carriage 186. - A further
horizontal pivot axis 188 is provided between thesecond arm 176 and thevertical pivot axis 178. Thispivot axis 188 is carried by a housing portion 190 (Figure 11) which is cast in one piece with a sleeve 192 (Figure 12) encircling thepivot axis 178. A motor (not shown) causes rotational movements of thearm 176 around thepivot axis 188 in accordance with a stored control program. A further motor (also not shown) moves the housing portion 190 (with the axis 188) around theaxis 178, also in accordance with a control program. - In accordance with European patent application No. 89123852, the
arm 172 with theholder 168 can be extended from the robot into a spinning position to be serviced or can be retracted back into the travelling robot. This is enabled by appropriate rotational movements of thearm 176 around theaxis 188. - The controlled movements of the
lever system vertical pivot axis 178 enable the (horizontal) displacements of a predetermined movement sequence. The vertical components are generated by pivoting of thearms horizontal axis - The above-mentioned space is of course limited by the length of the
arms arms long arms 172, 176 (which is undesirable). - In accordance with European patent application No. 89123852, therefore, the pivoting system is carried by a linearly movable carriage to enable performance of certain functions. The linear movements of the
carriage 186 are caused by rotation of the threaded spindle 196 (Figure 11), this spindle being carried by a chassis (not shown). Movements of thecarriage 186 are guided by means of a vertical guide rod 198 (Figure 11). - The movements of the
arms
- The programming of the movements of thearms carriage 186. Accordingly, at the start of a "movement phase" of thearms carriage 186.
- Thus, the programming of the movements of thearms
- Considered relative to thecarriage 186, the degrees of freedom provided by theaxes arms
- Each drive motor for setting the position of thehousing 190 and of thearms axes
- Because each servo-axis
- By appropriate coordination of the movement programs of all three servo-axes it is possible to move the strand guiding mouth of thepart 136 to any desired position in the previously mentioned space.
- The control of the complete device as a "system" is therefore effected by issue of a sequence of "travel orders" to individual servo-axes as determined by a central control. The travel orders are so defined relative to each other that the mouth M moves in the space in accordance with an operating program.
- Each servo-axis reports the completion of the travel order upon which it was previously engaged to the central control and thereupon receives a new order which can either comprise a further travel order or a wait command. - The central control is therefore designed as a sequential control system giving instructions and commands ("orders") to a system with distributed intelligence after the central control itself has received reports that the previously issued orders have been carried out (that is that a predetermined condition has been achieved within the system).
- In accordance with this invention, the
carriage 186 is now mounted upon the chassis of a travelling device in accordance with European patent application No. 90106217 (instead of upon the chassis of a piecing robot in accordance with European patent application No. 89123852). This mounting may be effected in such manner that the threaded spindle 196 (Figure 11) and the guide rod 198 are disposed horizontally (instead of vertically, as in European patent application No. 89123852). The movements of thecarriage 186 in this case do not serve to determine the "working height" of the pivoting system but to determine an operating position in the longitudinal direction of the rails 16 (Figure 1) of the creel. - In the course of a strand handling operation, the modified equipment could operate in the following manner:
- 1. the
transfer device 29 must be positioned at one of therails 16 of the creel, - 2. the strand end of a package in the reserve position must be found and grasped by a "gripper" of the pivoting system,
- 3. this strand must then be threaded with thread guiding means by controlled movements of the pivotal system. The thread guiding means can, for example, comprise the
guide 98 in Figure 6. It could however comprise a guide in accordance with our German patent application No. 3926347.9 of 9 August 1989 with the title "Spinning machine" or a guide in accordance with our US patent No. 4,408,731, - 4. the strand can then be handled by the robot in accordance with one of the following possibilities:
- A. the strand end is made ready in a suitable holder (not shown) for manual servicing of the spinning position (this solution will normally not be acceptable, but it is possible),
- B. the strand end is threaded into a joining device (for example in accordance with our European patent application No. 296546) associated with one of the spinning positions. Thus when, for example, the strand 96 (Figure 6) runs out, the new strand (99, Figure 6) is automatically joined with the old strand as it is about to run out,
- C. the new strand end is joined with the strand about to run out by the robot itself,
- D. the new strand end is threaded by the robot into the drafting arrangement of the spinning position for example in accordance with a procedure as described in DOS 36 26 268 or
EP 310 906 or Japanese examined patent application No. 56-43130. The above-mentioned possibilities 4.A., 4.B. and 4.D. will not be described here in further detail because they do not give rise to any particular difficulties. The required movements of the pivotal system can be carried out in accordance with the previously mentioned programming of the control system. Possibility 4.C. does contain additional problems, however. This possibility has therefore been selected for subsequent more detailed explanation of the overall operation.
- The first problem to be treated is that of timing. In the case of possibilities 4.A. and 4.B., strand manipulation can be carried out immediately adjoining upon the transfer of the new package from the train into the reserve position. The problems of appropriate positioning of the manipulating device are therefore solved because appropriate positioning of the combined transfer device and strand handling equipment is required in any event for the transfer operation.
- Possibility 4.D. can be carried out at any time after one of the packages has run out. This requires a thread break in the associated spinning position and possibly an associated loss of production at this spinning position.
- Possibility 4.C. can only be carried out under two sets of circumstances; either
- (a) the robot is exactly at the right position when the old strand runs out, or
- (b) the robot is at the required position before the old strand runs out and carries out a joining operation without waiting for expiry of the old package. In this case, strand remnants will be left on the tube which has to be transferred to the central storage belt.
- In any event, in cases 4.D., 4.C. (a) and 4.C. (b), where a fresh package is moved into
reserve position 20, it is not realistically possible to complete the strand handling operation immediately upon transfer of the package into the creel. The robot must return later to the same position and complete the operation. This is, however, practically realisable because the robot is not fully occupied for 100 per cent of its time with the transfer of packages into the creel and can carry out strand manipulating operations in the intermediate phases (between package transfer operations). - In the case of procedure 4.C. (a) the robot must be at the right place at the right time. This is only possible if a sensing system can respond to the approaching expiry of a package and a corresponding signal can be transmitted to the robot. A suitable sensing means is described (for example) in our German patent application No. 39 00 507 or in DDR patent No. 252592. Communication systems for transferring signals from the machine to a travelling device are described, for example in our European patent application No. 295 406. The central control device of the machine must either be in a position to carry out optimising (priority determining) routines in order to direct the robot by means of signals to the appropriate spinning position at the required point in time, or else the system must fall back on possibility 4.C. (b).
- The positioning operation (step 1 of the complete procedure) can be the same for the transfer of a package into the creel and for the strand manipulation operation. This will, however, influence the possible positions of the pivoting system (Figures 11 to 13) relative to the chassis.
- For the purposes of finding a strand end, the mouth portion 166 (Figure 11) must be provided with an appropriate end portion, for example in accordance with Figure 14. The adapted end portion 166A has a widening 167 at its free end which is better suited for sucking in a strand end lying on the surface of the package. The form of this end portion can be adapted to the curvature of the package surface (as indicated in dotted lines in Figure 14).
- The strand end could also be grasped by a mechanical gripper. However, the suction system has the advantage that a sensor can be provided to detect the presence of the strand end in the
tube 134 so that the robot then "knows" that it has grasped a strand for performance of a manipulation operation. - The strand end should where possible be positioned or held at a predetermined position on the surface of the package in order to facilitate the end finding operation. It may also be necessary to rotate the package in the course of a manipulating operation in order to reduce the risk of "loosing" of the strand end in the course of the manipulation. For this purpose, the robot can be provided with an extendable device for rotating of the new package. However, a device of this kind has not been shown in Figures 11 to 13.
- After the strand has been gripped, it can be manipulated by the pivoting system, as has already been indicated above.
- In the course of this manipulation the new strand end can be brought into the neighbourhood of the strand which is running out (for example the
strand 96, Figure 6). A splicing operation, for example in accordance withDOS 38 02 414 or EP 213 962, can then be carried out. For this purpose, the pivoting system could be provided with a severing means for parting the strand which is running out and, for example, with a nozzle similar to the nozzle indicated with thereference numeral 17 inDOS 38 02 414. However, it would also be possible to provide the pivoting system with a device in accordance with Figures 14 to 18 of EP 213 962. - The invention is not limited to the use of a device in accordance with European patent application No. 90106217. The described pivoting system, or a similar second pivoting system could also be used to transfer the packages from the train into the creel.
- One embodiment of a combined package transfer and strand handling robot according to this invention is shown in diagrammatic section in Figure 16. This Figure shows one side only of the creel of a machine according to Figure 15 (the packages in the creel have been omitted to provide more space for the important elements of the invention). One creel rail is indicated with the
same reference numeral 240 used in Figure 15. - The conveying path shown diagrammatically at 256 in Figure 15 is illustrated in greater detail in Figure 16. This path comprises a profiled
beam 300 forming a rail receiving runningwheels 302 of the trolley of transport train 304 (similar to train 23 of Figures 1 to 9).Beam 300 is supported by means not shown to extend horizontally parallel to the central plane CP (Figure 15) of the machine. - The train comprises a profiled longitudinal 306 suspended from the
wheels 302. The longitudinal carries apackage carrier member 308 which carries individual package supports 325 similar tosupports 25 of Figure 8. Eachsupport 325 can be released from thecarrier 308 for movement into the creel. - The package transfer robot is generally indicated at 310 and carries a section of
rail 312 for bridging the gap between thecarrier member 308 and acreel rail 240 to enable movement of apackage support 325 from the carrier onto the selected creel rail. Therobot 310 in this case has a hollow body 314 of generally inverted U-shape with a longer inner limb (nearer the machine) and a shorter outer limb.Rail section 312 is carried at the lower end of the longer limb. Thecomplete robot 310 runs onwheels 316 provided within the space between the limbs of the body 314 and seated on the top of the profiledbeam 300. - The longer limb of body 314 also carries an extendable and
retractable entrainment dog 318. When thedog 318 is extended (outwardly from the machine) it can engage (as indicated) in a receiving opening in thecarrier part 308 of the trolley or train. The latter is then coupled with the package handling robot for movement therewith along the rail provided bybeam 300.Robot 310 itself is drivable by means of amotor 320 coupled with thewheels 316. Whendog 318 is retracted, the train or trolley is released from therobot 310. - The upper section of
robot 310 caries guides 322 for a package pusher 324 which is movable linearly towards and away from the central plane CP of the machine and is also mounted for pivotal movement about a longitudinal axis LA of arod 326 forming part of the pusher. The pusher also includes a packagesupport engagement member 328 suspended by a downwardly extendingelement 330 from the guidedrod 326.Member 328 hasprojections 332 which can be engaged "behind" (that is on the side facing outwardly of the machine) the package supports 325 to push them along therail section 312 andcreel rail 240. - A first
pusher operating motor 334 is provided to move the pusher linearly towards and away from the central plane CP of the machine and a secondpusher operating motor 336 is provided to swing the pusher structure around the axis LA. This latter movement enables theprojections 332 to move past the re-positioned package supports 325 on the return stroke of the pusher (away from the center plane CP). - The movements of the packages into and through the creel will not be explained in detail here because they are essentially the same as those already explained in connection with Figures 1 to 9. The pusher structure illustrated in Figure 16 is designed to perform all required package movements (into and through the creel) in a single stroke by means of package
support engaging projections 332 fixed on the pusher structure. This requires uniform spacing of the various possible package positions. This arrangement has been illustrated by way of example only and is not essential. Alternative arrangements have been shown in European patent application No. 90106217. - The
package handling robot 310 shown in Figure 16 is a functional unit capable of operating without the strand handling robot now to be described. In accordance with the present invention, however,package handling robot 310 is supplemented bystrand handling robot 340 designed specifically to work together withrobot 310. Thestrand handling robot 340 differs from that described with reference to Figures 11 to 13 in that it is suspended fromrobot 310 to lie alongside the creel instead of being provided above the creel). Besides simplifying the avoidance of interference between the pusher structure and the strand handling elements, the arrangement shown in Figure 16 has the advantage that the strand manipulating elements are at least very similar (if not virtually identical) in theunit 340 operating on the creel and the unit 239 (Figure 15) operating on the spinning positions. - These strand manipulating elements comprise first and
second manipulator arms further servoaxis 348 on the body 35 ofrobot 340. At its free end,arm 344 carries asuction head 345 for grasping the strand to be manipulated, as already described with reference to Figures 11 to 14. - It will be seen from Figure 16 that the manipulator structure can operate directly on a
package 352 carried by a trolley aligned therewith. The manipulator can in particular find and grasp the end of the strand while thepackage 352 is still in its immediate neighbourhood (before shifting of the package into the creel). In order to facilitate the strand end finding operation,robot 340 can be provided (for example at its lower end as shown diagrammatically in Figure 16) with a package steadying and/or rotatingmember 354. This member is extendable into an operative position (as illustrated) grasping the lower end of the package tube 353 and rotating the tube if necessary to enable thesuction head 345 to locate the free end of the strand in the package. - As
package 352 is moved into the creel (after retraction of the member 354), the manipulator structure has to adapt to follow this movement and in particular to manipulate the strand relative to the package so as to enable at least the minimum preparation steps specified above in the paragraphs numbered 1 to 4.D. These steps will involve at the least engagement of the strand with a guide therefor within the creel, for example at theposition 248 in Figure 15. In order to enable the manipulator to reach a guide close to the central plane CP of the machine, it may be desirable to mount the whole manipulator structure on a carriage slidable on thebody 350 towards and away from the plane CP. This arrangement is illustrated diagrammatically in dotted lines at 356, while the arrangement illustrated in full lines has a fixed mount for the manipulator and thus assumes sufficient length of thearms - In the preferred embodiment, in which the strand manipulator is used to thread the strand into the drafting arrangement (228, Figure 15) the manipulator must also be able to extend downwardly from the
robot 340 through a distance far enough to enable it to reach the relevant part of the drafting arrangement. Here also, it would be possible to mount the manipulator on a slidable carriage (such as that provided in EP 8912385.2 for therobot 239, Figure 15), but this can be avoided if thearms body 350 of the robot preferably enables swinging of the manipulator not only about a horizontal pivot axis but also about a vertical pivot axis, that is, it is similar to the mounting shown at 178, 188 in Figure 13. - Although various possibilities have been described above (and all fall within the scope of the invention), the preferred system is one in which the strand handling robot actually threads the new strand into a drafting arrangement of the relevant spinning position. The strand is then taken up by the drafting arrangement and is forwarded thereby to the other elements of the spinning position. Since this is the preferred system, one embodiment (based on our recently granted US patent No. 4,922,704) will be briefly described for the sake of completeness of the present disclosure.
- Figure 17 is a modified version of the arrangement shown in Figure 1 of US patent No. 4,922,704. This Figure shows one spinning position (or spinning station) of a ring spinning machine comprising for example 1000 such positions arranged in two rows on opposite sides of the central plane of the machine. The spinning position is fed with roving 402 from a
package 401 in a creel such as that shown in Figure 15. The roving is drafted in a drafting unit 403 before being spun to ayarn 404 as it leaves the delivery rolls of the drafting unit 403. The spun yarn is guided by way of atraveller 405 on a ring carried by a partly illustratedring rail 406 to a package in the form of acop 407 on a non-illustrated spindle. The traveller and ring are only partly illustrated and are not especially indicated by reference numerals. - A spinning position servicing tender 412 is movable on rails parallel to the longitudinal direction of the machine and can perform servicing operations on the illustrated elements of the spinning position, in particular the cop winding unit (formed by the
rail 406, ring,traveller 405 and spindle) and the delivery section of the drafting unit. - The drafting unit 403 comprises a
break drafting zone 415 and amain drafting zone 416. Thebreak drafting zone 415 is defined by a feed roller pair comprising atop feed roll 417 and abottom cylinder 418, and amiddle roller pair 421 fitted with drafting aprons 422. The main drafting zone extends between the middle pair ofrolls 421 and a pair of delivery rolls 423. The top rolls of each pair of adjacent spinning stations are combined as usual in a common mounting (not shown), which is associated with and connected to the adjacent spinning stations by means of a common shaft to form twin top rolls for neighbouring spinning positions. Each individual top roll is associated with its own particular station. The bottom rolls extend over the whole length of the machine and are driven in a machine end head. - In the absence of
yarn 404, asensor 409 which is disposed at a suitable place between the pair of delivery rolls 423 and thering rail 406 transmits to the robot 412 a signal indicative of a break in the yarn delivered from the drafting unit 403. Alternatively, the robot 412 itself may have a yarn break sensor. Thereupon, the carriage 412 locates at a position in front of the associated spinning station. If however, the yarn break is due to running out of the strand supply from a feed package, then the servicing (yarn piecing) robot 412 cannot deal with the problem alone. Areserve package 411 should be brought into action. This package has previously been introduced into the creel (Figure 15) by arobot 410 in accordance with this invention, and at that time the strand end has been placed in readiness at apredetermined location 433 by means of astrand handling unit 440 for example as described with reference to Figure 16. - This location is the reference or take-up
point 433. Therobot carriage 440 carriesmovable arms gripper 464 to engage the end part 437 of the roving at thereference point 433. The arms serve to move thegripper 464 between thereference point 433 and arelease point 490 immediately upstream of themain drafting zone 416. After engaging the end part 437 atreference point 433, thegripper 464 performs a programmed three-dimensional movement whereby the end part 437 is brought into thepoint 490, in such a manner that the end part 437 passes into the nip of the middle pair ofrolls 421 and is thus engaged thereby. In this movement of thegripper 464, thepreliminary drafting zone 415 is effectively bypassed, that is the portion of roving upstream of the middle pair ofrolls 421 is not subjected to drafting. - The travel of the
gripper 464 laterally bypasses thetop feed roll 417, that is thegripper 464 goes past the free end face of the top feed roller. This movement of thegripper 464 engages the manipulated strand with a spacer 419 (not clearly shown in Figure 17, see US patent 4,922,704), which keeps the roving spaced from the free end face of the feed roller until the roving is engaged by the middle pair ofrolls 421. - The spacer 419 (one for each twin top roll) is mounted on the top half of a bearing housing for the bottom feed roll between two adjacent pairs of top rolls 417. An upright retaining limb of the spacer is pivotable to move between a blocking position to hold the roving in position spaced from the feed rolls 417, 418 and a release position to permit the roving to move laterally to the face of the
top feed roll 417. This limb is adapted to be flipped over by means of an electric or pneumatic pulse which originates from an emitter 442 on thecarriage 440 and which is fed from areceiver 446 via aline 447. The triggering pulse to the spacer is given as soon as the end part 437 has been introduced into themain drafting zone 416, that is, has been engaged by the middle pair ofrolls 421. The roving then slides or is drawn out of its laterally displaced position and gradually, without further actuation, passes between thetop feed roll 417 and thebottom feed roll 418 as a result of tightening due to the drawing force or tension exerted by themain drafting zone 416. - The
reference point 433 can be provided by a guide means such as theguide 98 in Figure 6. Similar guides are shown in EP patent publication No. 329 965 (US SN 308,405) and also in applications corresponding with Swiss patent application No. 4185/89 dated 20 November 1989. It will be seen fromFiqure 6 that adjacent rows of packages atpositions - The strand newly drawn in by the drafting unit is first taken up by a suction removal system (not shown) at the delivery rolls. However, the strand is now fully introduced into the spinning position and is readily accessible to the piecing
robot 312 for performance of a piecing operation, for example as described in European patent application No. 90105020 (corresponding with US patent application serial No. 07/497,330 and Japanese patent application No. 2-68566). - It will be readily appreciated from Figure 17 that the piecing
robot 312 can be located in front of the spinning position to be serviced while the package and strand handling robot is located immediately above it. By means of a suitable control system communicating with both robots, they can be brought to the relevant spinning position at the same time so that the piecing robot can restart spinning as soon as the new strand has been threaded into the drafting arrangement. Alternatively, the piecing robot can be directed to the relevant spinning position shortly after a strand threading operation has been completed. - The strand and package handling robot could operate a signal indicating that the spinning position is once again in a condition in which it can be serviced by the piecing
robot 312. The latter robot can patrol the spinning positions and can be fitted with a sensor to detect the signal set (at the spinning position) by the package and strand handling robot. The piecing robot then performs its servicing operation. At the very least, the piecing robot should be provided with means to detect whether the spinning position to be serviced by it is in a serviceable condition, for example by detecting a flow of fiber from the drafting unit.
Claims (14)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH3523/89 | 1989-09-28 | ||
CH352389A CH680129A5 (en) | 1989-09-28 | 1989-09-28 | Ring-spinning frame umbrella creel |
CH412789A CH682160A5 (en) | 1989-11-16 | 1989-11-16 | Travelling appts. for textile spinning machines |
CH4127/89 | 1989-11-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0419968A1 true EP0419968A1 (en) | 1991-04-03 |
EP0419968B1 EP0419968B1 (en) | 1995-12-27 |
Family
ID=25693234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900117733 Expired - Lifetime EP0419968B1 (en) | 1989-09-28 | 1990-09-14 | Manipulation of strand packages or strands in a spinning machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0419968B1 (en) |
JP (1) | JPH03206133A (en) |
DE (1) | DE69024444T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5280699A (en) * | 1990-07-31 | 1994-01-25 | Zinser Textilmaschinen Gmbh | Method and apparatus for disposing an end of a roving bobbin for intake into the drafting device of a textile spinning machine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4473997A (en) * | 1983-04-29 | 1984-10-02 | Howa Kogyo Kabushiki Kaisha | Method and apparatus for switching roving bobbins in a spinning frame |
EP0213962A2 (en) * | 1985-09-04 | 1987-03-11 | Howa Machinery Limited | Roving-piecing method in spinning frame and roving-piecing head for carrying out said method |
EP0258188A2 (en) * | 1986-08-25 | 1988-03-02 | Howa Machinery Limited | Method for piecing rovings and exchanging roving bobbins in a ring spinning frame and working machine for carrying out this method |
US4833874A (en) * | 1988-05-21 | 1989-05-30 | Fritz Stahlecker | Yarn package exchange device and apparatus for spinning machines for double prestrengthened yarn |
-
1990
- 1990-09-14 DE DE1990624444 patent/DE69024444T2/en not_active Expired - Fee Related
- 1990-09-14 EP EP19900117733 patent/EP0419968B1/en not_active Expired - Lifetime
- 1990-09-27 JP JP25546290A patent/JPH03206133A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4473997A (en) * | 1983-04-29 | 1984-10-02 | Howa Kogyo Kabushiki Kaisha | Method and apparatus for switching roving bobbins in a spinning frame |
EP0213962A2 (en) * | 1985-09-04 | 1987-03-11 | Howa Machinery Limited | Roving-piecing method in spinning frame and roving-piecing head for carrying out said method |
EP0258188A2 (en) * | 1986-08-25 | 1988-03-02 | Howa Machinery Limited | Method for piecing rovings and exchanging roving bobbins in a ring spinning frame and working machine for carrying out this method |
US4833874A (en) * | 1988-05-21 | 1989-05-30 | Fritz Stahlecker | Yarn package exchange device and apparatus for spinning machines for double prestrengthened yarn |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5280699A (en) * | 1990-07-31 | 1994-01-25 | Zinser Textilmaschinen Gmbh | Method and apparatus for disposing an end of a roving bobbin for intake into the drafting device of a textile spinning machine |
Also Published As
Publication number | Publication date |
---|---|
DE69024444D1 (en) | 1996-02-08 |
DE69024444T2 (en) | 1997-03-20 |
EP0419968B1 (en) | 1995-12-27 |
JPH03206133A (en) | 1991-09-09 |
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