EP0960964A1 - Verfahren und Vorrichtung zum Wiederverbinden des formierenden Garnes in einer Spinnmaschine - Google Patents

Verfahren und Vorrichtung zum Wiederverbinden des formierenden Garnes in einer Spinnmaschine Download PDF

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Publication number
EP0960964A1
EP0960964A1 EP99110098A EP99110098A EP0960964A1 EP 0960964 A1 EP0960964 A1 EP 0960964A1 EP 99110098 A EP99110098 A EP 99110098A EP 99110098 A EP99110098 A EP 99110098A EP 0960964 A1 EP0960964 A1 EP 0960964A1
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EP
European Patent Office
Prior art keywords
yarn
spindle
assembly
ring
cop
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EP99110098A
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English (en)
French (fr)
Inventor
Mario Turconi
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OFFICINE GAUDINO SpA
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OFFICINE GAUDINO SpA
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Publication of EP0960964A1 publication Critical patent/EP0960964A1/de
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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
    • D01H15/013—Carriages travelling along the machines

Definitions

  • This invention concerns a method to automatically re-connect the forming yarn in a spinning machine, and the relative device, as set forth in the respective main claims.
  • the invention is applied in the textile field, in spinning processes, to automatically re-connect the yarn winding onto the forming spindle when there is a break in the feed.
  • the invention is devised to reduce the time needed to carry out the re-connection, and therefore to restart the spindle, increasing the percentage of success of the operation and substantially eliminating any need for manual intervention.
  • the traditional structure of a spinning machine whether it be for wool, cotton or any other type of yarn, includes a plurality of spindles arranged in a row onto which the cop which supports the yarn is fitted.
  • the spindles are normally made to rotate by means of a system including tangential belts and cooperate with systems to feed and guide the yarn and with braking means.
  • a system including tangential belts and cooperate with systems to feed and guide the yarn and with braking means.
  • a cursor inside which the yarn is made to pass, is associated with a spinning ring assembled on a ring-bearing block which moves vertically in a progressive manner with respect to the spindle during the formation of the spindle of yarn.
  • the worker has to control one front, or both fronts, of the spinning machine, and has to intervene quickly in the event of a breakage. He/she has to identify the end of the broken yarn on the spool, and must re-insert it inside the path between the cursor and the yarn-guiding loop and bring the two yarn-ends into contact so as to re-join them.
  • EP-B-518029 shows a method and the relative device to search for the end of a yarn, or to launch an auxiliary yarn, on a spool or empty cop.
  • This document also teaches to use a device to launch an auxiliary yarn in the event that the suction bell is unable to find the end of the broken yarn.
  • EP-B-391110 describes a device to prepare a section of auxiliary yarn, taken from a reserve store, and to re-connect it to the end of the broken yarn on the spinning machine.
  • the device is disposed to thread the section of auxiliary yarn inside the ring cursor which rotates around the spinning ring.
  • the suction mouth is displaced in a three-way movement to manipulate the yarn and arrange it in correspondence with a precise position, obliquely and inclined downwards, with respect to the spinning ring; finally, the ring cursor is displaced mechanically, by means of a brush or a jet of air, to take it into correspondence with the said yarn which is held stationary in position.
  • DE-A-26 12 660 describes a device suitable to identify a spindle where a yarn has broken, and also suitable to carry out an automatic procedure to re-connect the ends of the yarn.
  • the broken yarn is identified by a series of movable sensors which work through contact, in this specific case piezoelectric quartz sensors; they detect the presence, or non-presence of a yarn in the position between the straightening cylinders and the yarn-guiding loop located above the spindle.
  • the device to re-connect the yarn according to DE'660 provides to remove the cop from the spindle, by means of a gripper unit provided for this purpose, and to search for the broken end of the yarn on the cop which has been removed from the spindle.
  • the removal of the cop is preceded by a step where both the yarn-guiding loop and the anti-balloon ring are raised; these lifting steps are carried out by movable units provided for this purpose and assembled on the translating trolley which carries the device.
  • the device does not provide any procedures to manipulate the yarn to thread it into the anti-balloon ring.
  • the end of the broken yarn is therefore searched for by making the cop rotate, when it has been removed from the spindle, in the opposite direction to that in which the yarn is wound, and by sucking up the end of the yarn inside a suction bell.
  • the device described in DE'660 also comprises a reserve forming unit, but this too is extremely slow and complicated in functioning; moreover, it is very expensive to construct.
  • DE-A-4010113 describes a device suitable to pick up the end of a yarn from a reserve spool which can be located at two different heights with respect to the top of the spindle, to thread the yarn between the guide elements associated with the spindle, to cut the yarn and to re-connect it with the yarn arriving from the straightening assembly.
  • This device therefore does not provide to search for the end of the broken yarn on the spool wound onto the cop and to re-connect it to the end of the yarn arriving from the straightening assembly.
  • the present Applicant therefore set the problem of devising and embodying a device to automatically re-connect the forming yarn in a spinning machine which will guarantee a high level of reliability and functionality without involving unsustainable costs, bulk, complexity and cycle times, and to this purpose has devised, tested and embodied this invention.
  • the purpose of the invention is to achieve a method to automatically re-connect the yarn, and the device which embodies it, so as to perform the operation of joining two interrupted ends of a forming yarn every time this should be necessary, in a completely automated manner, with maximum reliability and versatility and with performance times reduced to a minimum.
  • the device according to the invention substantially consists of a moving system with a movable trolley suitable to move on a guided path along the front of the spinning machine so as to position itself in correspondence with the spindle where the yarn has been interrupted.
  • a translating structure is installed on the movable trolley and supports the operating assemblies which are driven in an automatic and synchronised manner and which perform the steps in sequence to re-connect the yarn.
  • the operating assemblies comprise at least:
  • each of these assemblies is driven by respective actuators which act in a pre-determined cycle sequence and according to impulses governed by means to emit authorisation signals.
  • an optical detection system is mounted on the movable trolley to detect the broken yarn; this system is suitable to command the movable trolley to stop in correspondence with the spindle where the yarn has broken.
  • This optical system is suitable to search the spindles in a position ahead of that of the operating assemblies on the movable trolley, in order to allow the trolley to decelerate and brake in a correct position when a breakage of the yarn is detected.
  • the aspiration assembly comprises an aspiration tube shaped like a bell and open downwards which is suitable to position itself above and coaxial with the spindle, in a position such as to cover the spinning head which is included above the spindle; this prevents the yarn twisting and jamming on the spinning head after aspiration.
  • the device comprises a braking assembly for the spindle which, at the beginning of the cycle, brakes the spindle and, during the step when the end of the yarn is identified on the spool, clamps the spindle by means of pulsations, which facilitates the unwinding of the end of the yarn from the spool.
  • the interrupted ends of the yarn are joined above the outlet pressure cylinder which is solid with the structure of the spinning machine and located above the relative spindle, thus ensuring that the re-connection of the yarn is more reliable and therefore guaranteeing a greater productivity of the re-connection device and a greater overall productivity of the spinning machine.
  • the assembly to manipulate the yarn consists of a gripper element suitable to perform movements on a vertical plane parallel to the axis of the spindle, and also movements on a horizontal plane so that, during the step preceding re-connection, the yarn can be maintained inside the anti-balloon ring and/or can be threaded inside the cursor.
  • the automatic re-connection device according to the invention is shown in its entirety in the attached Figures by the reference number 10, and is suitable to cooperate with a spindle 11 assembled on a spindle-bearing block 60 in a spinning machine of a conventional type.
  • the spindle 11 cooperates with conventional belt-type tangential drive means, braking means, yarn-guiding means, etc., which are not shown in detail here except for those parts which directly interact with organs of the device 10 or in particular steps of the re-connection cycle.
  • the cop 13 is fitted onto the spindle 11 and the yarn 14 is wound onto the cop 13 to form the spool.
  • the spindle 11 is of the type with an upper spinning head 15 and cooperates with a ring-bearing block 12 which moves with a vertical ascending-descending motion during the progressive forming of the spindle of yarn.
  • the yarn 14 cooperates above with a yarn-guiding loop 16 mounted on a support 17 rotating around an axis 32 and at an intermediate position with a ring 18 to limit the balloon which is created during winding.
  • the ring-bearing block 12 has a spinning ring inside which a cursor 22 rotates which allows the yarn 14 to wind onto the cop 13 creating a torsion of the yarn with respect to the axis of the spindle 11, which, together with the action of the straightening assemblies 19, causes the slubbing to be transformed into yarn.
  • the cursor 22 is made to rotate by the yarn 14 itself.
  • the device 10 comprises a moving system consisting of a movable trolley 21 suitable to translate on a guided path, on tracks, rails, guides, so as to inspect sequentially the front of the spinning machine and identify where the forming yarn has been interrupted and thus broken.
  • the movable trolley 21 is commanded either by radio or by wires.
  • the movable trolley 21 is equipped at the lower part with a motor 61, equipped with an inverter; a pinion 62 is keyed onto the shaft and engages on a transmission chain 63 located on the guide rail.
  • the motor 61 is sized so as to have available the necessary driving force needed to translate the movable trolley 21 and to ensure it is positioned precisely in correspondence with the spindle 11 affected by the broken yarn.
  • the transmission chain 63 is positioned with the links arranged vertical and extends along the whole front of the spinning machine, indicated generally with the reference number 65 in Fig. 1b.
  • This arrangement of the chain 63 makes it possible to engage the pinion 62, and therefore to transmit movement, even in the points, as shown in Fig. 1b, wherein the movable trolley 21 performs a curved trajectory so as to travel from one front of the spinning machine 65 to the other.
  • the movable trolley 21 travels on guides, respectively upper 66a and lower 66b, which develop parallel for the whole length of the spinning machine 65.
  • the lower guide 66b is made on the floor and connected with the structure of the spinning machine 65, while the upper guide 66a is attached to the spinning machine 65, at a height of about 2 metres with respect to the ground.
  • the lower guide 66b is made along the automatic doffing device arranged at the base of the spinning machine and used to discharge the full spools at the end of the forming cycle from the spinning machine 65.
  • Oscillating pads 67 cooperate with the guides 66a and 66b, in this case, two attached above and two attached below.
  • Each pad 67 is able to rotate around a vertical axis during the execution of the curve so as to pass from one front of the spinning machine 65 to the other.
  • the electric feed to the trolley 21 is supplied by a system with sliding contacts (not shown here) which slide on a busway located in correspondence with the upper guide 66a.
  • the movable trolley 21 has a bearing frame 68 which includes the spaces to house all the functional and auxiliary assemblies needed for the device 10 to function.
  • the bearing frame 68 supports a translating structure 23 on which are assembled the operating assemblies which perform the re-connection cycle in cooperation with the spindle 11 wherein the interruption has occurred.
  • the electric panel 109 and the electrovalves 110, the aspiration assembly 111 consisting of pump, filter and tank, and the air compression plant 112 are also mounted on the movable trolley 21.
  • optical position sensors (which have the function of centering the movable trolley 21 with respect to the spindle 11) are mounted in the front area of the bearing frame 68.
  • optical detection system 113 which serves to read the presence of the yarn 14 and therefore to identify the spindle 11 wherein the interruption has occurred.
  • the optical detection system 113 comprises a video camera 115 associated with an illumination light 131 mounted adjacent to the video camera 115 and on the same support 116.
  • the video camera 115 is set to detect the presence or absence of the forming yarn by a direct reading of the yarn itself, in the segment which goes from the straightening assemblies 19 to the spinning head 15 of every spindle 11.
  • the video camera 115 is set to monitor the contrast between the image of the yarn and a background consisting of the casing of the spinning machine 65, and is directed in such a manner as to perform this monitoring in correspondence with the spindle 11 arranged in a position one ahead, in the direction of advance of the movable trolley 21, with respect to the position of the operating assemblies mounted on the movable trolley 21 corresponding to the axis of re-connection.
  • the orientation of the video camera 115 and the field it reads are regulated in such a manner that, at the moment the movable trolley 21 as it performs the inspection movement parallel to the front of the spinning machine 65 is exactly at the center with respect to the axis of a spindle 11, only the yarn 14 subsequent to that position is pictured, whereas two consecutive yarns 14 are pictured when the trolley is not in axis with the spindle.
  • FIGs. 3c-3f show the four possible cases of optical detection of the system 113.
  • the reference number 116 indicates the field read by the video camera 115 while 117 indicates the direction of advance of the movable trolley 21.
  • the camera 115 reads, in a position one ahead of the position of the re-connection assemblies, the presence of a single yarn 14.
  • the monitoring of the optical system 113 provides a signal that the yarns 14 are not interrupted, and therefore the trolley 21 continues its advance and inspection.
  • the video camera 115 continues to detect the presence of a yarn 14 in its field of reading 116, and therefore the trolley 21 continues to advance until the reading axis is perfectly aligned with the axis of the spindle (Fig. 3f).
  • the video camera 115 does not detect the presence of any yarn and supplies the signal to stop the trolley 21 and to start the re-connection cycle.
  • the presence of the yarn is detected in advance (that is, on the following spindle 11b) with respect to the position of the axis of re-connection, indicated by the reference number 118, of the device 10 (Fig. 3b), corresponding to the spindle 11a wherein the interruption of yarn has occurred.
  • the trolley 21 can decelerate and stop exactly in axis with the spindle 11a where the interruption of the yarn 14 has occurred.
  • the method according to the invention may optionally include a resetting procedure, when spinning is begun, which serves to identify the spindles 11 not fed by the spinning machine in order to prevent the device 10 from mistaking the non-presence of the yarn due to the inactivity of the spindle 11 for an interruption in the feed.
  • a resetting procedure when spinning is begun, which serves to identify the spindles 11 not fed by the spinning machine in order to prevent the device 10 from mistaking the non-presence of the yarn due to the inactivity of the spindle 11 for an interruption in the feed.
  • this procedure is carried out by an autonomous assembly 69 assembled on the movable trolley 21 and suitable to move vertically on a slider 103 mounted on an upright 119 (Fig. 4c).
  • This assembly 69 is also suitable to move orthogonally to the spindles 11, upon activation of a slider 120, to draw near to them when the cycle to form a reserve begins and then to move away from them at the end of the cycle.
  • the assembly 69 (Figs. 4a and 4b) comprises a gripper to wind the yarn 70, consisting of a stationary arm 70a and a movable arm 70b.
  • the gripper 70 is driven by a first opening/closing actuator 71 and a second actuator 72 which makes it rotate around a substantially horizontal axis 73.
  • the gripper 70 is mounted on a support 74 which, upon activation of the sliders 103 and 120, is equipped with horizontal movement shown by the reference number 75, perpendicular to the axis 24 of the spindle 11 (shown here in diagram form) and with vertical movement, shown by the reference number 76, parallel to this axis 24.
  • the assembly 69 is also equipped with, or cooperates with, an adjustable vacuum generator, suitable to generate the vacuum needed for the aspiration of the yarn 114 inside the gripper 70.
  • the gripper 70 cooperates with an auxiliary spool 77, mounted on an appropriate support 121, which supplies the assembly 69 with the yarn 114 needed to form the reserve on all the cops 13 of the spinning machine 65.
  • the reserve is formed partly on a ring 122 with a knurled surface arranged on the spindle 11 below the cop 13 and partly on the lower part of the cop 13 itself, as will be seen hereafter.
  • Figs. 5a-5f show how assembly 69 functions.
  • one end of the yarn 114 supplied by the reserve spool 77 has been inserted into the flexible tube 78a associated with the stationary arm 70a of the gripper 70.
  • the gripper 70 is translated, in its open condition, horizontally towards the spindle 11 by the movement of the support 74 in direction 75, and is closed around the spindle 11 itself (Fig. 5b), determining a circuit inside which the yarn passes.
  • the electrovalve which commands the vacuum generator is activated for the aspiration of the yarn 114, inserted in the flexible tube 78a, in such a manner that a long segment of yarn is inserted into the through hole in the stationary arm 70b of the gripper 70 and the flexible tube 78b associated therewith, then aspiration is stopped.
  • the movable arm 70b is opened and part of the yarn contained in the flexible tube 78b returns (Fig. 5c), then the gripper 70 is moved backwards and distanced from the axis 24 of the spindle 11, thus causing more yarn 114 to return from the flexible tube 78b (Fig. 5d) and resting the yarn on the ring 122.
  • the braking assembly then releases the spindle 11 which is made to rotate and returns the yarn from the reserve spool 77 and winds it onto the ring 122 for the desired number of spirals.
  • the spindle 11 is then braked again, the gripper 70 is closed and again rotated in an inverse direction to return it to the initial position.
  • the assembly 69 is lowered back to its initial position, and the movable trolley 21 can move in correspondence with another spindle 11 so as to repeat the cycle of forming the reserve.
  • the correct positioning of the movable trolley 21 with respect to the spindle 11, both to make the reserve at the start of the cycle and to re-connect the yarn in the event of a breakage, is carried out by means of optical monitoring performed by a fibre optic sensor 104 suitable to cooperate with a reference point located in correspondence with the stationary part 26 of the spinning machine 65 below the spindle 11 (Fig. 2).
  • the re-connection cycle provides for the advance of the translating structure 23 perpendicularly towards the front of the spinning machine 65.
  • the translating structure 23 is driven by means of a pneumatic cylinder 25 arranged in the lower part of the movable trolley 21.
  • the translating structure 23 is centered with respect to the axis 24 of the spindle 11 by means of sensors which cause the motor 61, advantageously of the self-stopping type, to stop in the correct position.
  • the translating structure 23 is suitable to move orthogonally and towards the axis 24 of the spindle 11 guided by guides 27 of the prismatic type or with circulating balls.
  • the movement of the translating structure 23 towards the spindle 11 causes a braking lever 29 solid with the structure 23 to couple with a fin 81 of the brake of the spindle 11.
  • the braking lever 29 is activated so that it is subsequently possible to command the pulsation braking of the spindle 11, as will be explained hereafter.
  • the sliders are activated; these support respectively an assembly 28 to manipulate the yarn and a first blowing assembly 83 suitable both to recover the cursor and also to blow peripherally to detach the end of the yarn 14 from the spool.
  • blowing assembly 43 which acts below the ring-bearing block 12 to make it easier to identify and catch the end of the interrupted yarn 14.
  • the slider 106 of the assembly 83 rests on the ring-bearing block 12 due to gravity and helps its alternate movements in a vertical direction performed during the spinning process.
  • the assembly 83 (Fig. 13) has an encircling fork-type shape suitable to cooperate with the periphery of the spool wound onto the cop 13, and is equipped with first nozzles 30, suitably oriented and mounted on vertical raised walls 123, which direct jets of air to identify and detach the end of the interrupted yarn from the spool on which the yarn is wound.
  • second nozzles 130 arranged on a substantially horizontal plane, which serve to identify and position in a certain manner the cursor 22 on its relative ring on the ring-bearing block 12, so as to allow the yarn 14 to be inserted inside in the way we shall see hereafter.
  • the identification of the end of the yarn can be made easier, according to the invention, by activating the braking lever 29 intermittently, which causes a pulsating rotation movement of the spindle 11 which encourages the unwinding of the yarn from the wound spirals.
  • this identification is also made easier by the second blowing assembly 43, positioned below the ring-bearing block 12 and equipped with nozzles 86 directed in such a manner as to deliver a jet of air converging towards the axis 24 of the spindle 11.
  • the second blowing assembly 43 is mounted on the translating structure 23 and is associated with a slider 84 which allows it to be moved vertically so as to be able to travel to a position of non-interference (shown by a line of dashes in Fig. 6) in the steps where it does not need to be used.
  • the step when the end of the yarn is picked up also provides for an aspiration bell 31 to be positioned in cooperation with the top of the spindle 11 and coaxial therewith.
  • the bell 31 is arranged on the end of an aspiration tube 48 associated with the aspiration system 111.
  • a lever 105 is activated orthogonally to the front of the spinning machine 65, in order to lift the yarn-guiding loop 16 and make it rotate around its axis 32, thus liberating the space above the spindle 11.
  • the lever 105 (Figs. 17a and 17b) is attached vertically to an upright 124 attached to the translating structure 23 and is associated with a vertical actuator 123.
  • the actuator 123 When the loop 16 has to be raised, the actuator 123 is activated and makes the lever 105 progressively rotate around the pin 125 and raises the loop 16 until it is taken to a position 16a of non-interference with the upper part of the spindle 11 and of the relative spinning head 15.
  • the aspiration bell is mounted on a slider 87 (Figs. 1, 8 and 9) which can slide vertically on an upright of the translating structure 23.
  • the aspiration bell 31 performs a first, horizontal movement to approach the spindle 11 and position itself substantially coaxial therewith and above; then, due to gravity, it makes a vertical lowering movement until it goes to cover the top of the spindle 11 and, in particular, to wind around the spinning head 15.
  • the vertical lowering travel of the aspiration bell 31 may be stopped by means of a mechanical abutment or a pneumatic end-of-travel device.
  • the aspiration bell 31 first lowers itself to the level of the upper edge of the cop 13, then advances perpendicularly to the front of the spinning machine 65, displacing, because of its conformation, the yarn-guiding loop 16.
  • the pulsating braking is activated with a frequency such as to generate a centrifugal force on the first segment of broken yarn which helps to detach it from the spool.
  • the blowing action of the nozzles 30 and 86 causes the end of the yarn 14 to be detached and raised, and directed towards the aspiration bell 31, which intercepts the yarn and sucks it back.
  • the manipulation assembly 28 has the function of catching the yarn 14 and inserting it inside the cursor 22 located on the ring-bearing block 12, inside the anti-balloon ring 18 and inside the yarn-guiding loop 16.
  • the manipulation assembly 28 comprises a first slider 33 movable orthogonally to the front of the spinning machine 65 on which a second 37 and a third 137 slider are mounted.
  • the second slider 37 can be translated on a substantially horizontal plane and in a direction orthogonal to the direction in which the translating structure 23 moves, in order to allow the right/left movement with respect to the spindle 11 of a yarn-gripping gripper 34 comprising a gripper element 35 shaped like a hook.
  • the third slider 137 can be translated orthogonally to the front of the spinning machine to move only the gripper element 35 nearer to or away from the spindle 11 during the manipulation cycle.
  • the step to manipulate the yarn is preceded by an operation to intercept and position the cursor 22 on the ring-bearing block 12.
  • the cursor 22 is in a random circumferential position on the ring on which the spindle 11 is inserted and must be correctly re-positioned so as to allow the yarn 14 to be inserted inside the cursor 22 before the join is made.
  • the cursor 22 is positioned, in this case, by means of the blowing nozzles 130, suitably oriented, arranged on the assembly 83.
  • the orientation of the direction of blowing of the nozzles 130 causes their combined action to automatically determine the angular position of the cursor 22 in a precise, desired position.
  • the cursor is intercepted by means of a tangential blowing by the nozzles, but the cursor 22 is stopped in the desired position due to the presence of a mechanical stop element, mounted on the support on which the nozzles 130 are positioned.
  • the manipulation assembly 28 In order to insert the yarn 14 inside the path between the cursor 22 and the loop 16, the manipulation assembly 28 assumes three different positions in height on the translating structure 23: respectively a first, high position 28a to capture the yarn, a second intermediate position 28b to insert the yarn into the anti-balloon ring 18 and a third low position 28c to insert the yarn into the cursor 22.
  • the high position 28a is then taken up again to insert the yarn 14 into the loop 16.
  • Fig. 10 The three positions are shown in Fig. 10 where the reference element always illustrated is the supporting block 126 where the sliders 37 and 137 are mounted.
  • the yarn 14 is intercepted and captured in a position above the spindle 11, firstly by advancing the first slider 33 and then the third slider 137 towards the spindle 11 so as to bring the gripper element 35 to pass by the position of the yarn 14, then by moving the second slider 37 towards the right (direction 38a) to capture the yarn (Fig. 11a).
  • the gripper element 35 is retracted, withdrawing the whole manipulation assembly 28 with respect to the spindle 11 (direction 38b; Fig. 11b).
  • the slider 33 is then displaced vertically downwards (direction 38c), until it rests on the bar which supports the anti-balloon ring 18, in order to insert the yarn 14 inside said ring 18.
  • a mechanical stop is activated which determines the correct positioning in height of the manipulation assembly 28 with respect to the anti-balloon ring 18.
  • the mechanical stop comprises a pin 127, movable horizontally due to the activation of an actuator 128, which is activated towards the outside during the downwards step of the manipulation assembly 28 from the high position 28a to the intermediate position 28b (Fig. 10).
  • the yarn 14 is inserted into the ring 18 by displacing the slider 37 towards the left on a horizontal plane (direction 38d; Fig. 11d) so as to take the yarn 14 from one side of the anti-balloon ring 18 to the other, to insert it between the two staggered ends 18a and 18b, with the gripper element 37 passing between the two ends 18a and 18b.
  • the slider 137 is retracted (direction 38e; Fig. 11e) to eliminate the interference between the gripper element 35 and the anti-balloon ring 18; after this follows the further descent of the manipulation assembly 28 (direction 38f) to arrive in the low position 28c where it rests on the ring-bearing block 12.
  • the yarn 14 is now ready to be inserted inside the cursor 22.
  • the lowering of the manipulation assembly 28 on the block 12 has caused the positioning of a stop cylinder 108 mounted on the manipulation assembly 28, resting on the block 12 and in a position where it crushes and retains the yarn 14 against the block 12.
  • the stop cylinder 108 is made of plastic or rubber and performs the temporary retaining action without ruining or damaging the yarn 14 in any way.
  • the second slider 37 is displaced horizontally towards the right (direction 38g; Fig. 11g) in order to remove a segment of yarn 14 from the aspiration bell 31, thanks to the retaining action carried out by the stop cylinder 108.
  • the segment of yarn is arranged under tension just above the block 12 and tangentially to the ring inside which the cursor 22 rotates.
  • first 33 and third slider 137 are displaced forwards (direction 38h; Fig. 11h) towards the spindle 11 in order to bring the yarn tangentially nearer to the cursor-bearing ring until the yarn 14 is inserted into the aperture of the cursor 22 itself.
  • the insertion is completed by raising the stop cylinder 108 (direction 38i) and thus liberating the yarn 14.
  • a further advance of the gripper element 35 causes the yarn 14 to be released from the hook-type end of the gripper element.
  • the gripper element 35 is first retracted (direction 38l), then translated towards the left (direction 38m), and then again advanced towards the spindle 11 (direction 38n) to be prepared for the yarn 14 to be inserted into the yarn-guiding loop 16.
  • the loop 16 is lowered (direction 38o) to the working position above the spinning head 15 of the spindle 11 by retracting the lever 105 to the inactive position.
  • the yarn 14 is now under tension between the cursor 22 and the aspiration bell 31 arranged above the spindle 11.
  • the manipulation assembly 28 is raised along the translating structure 23 until it is substantially located at the height of the yarn-guiding loop 16, in the high position 28a.
  • the second slider 37 is displaced towards the right (direction 47a; Fig. 12b), gripping the yarn 14 with the gripper element 35, and then the third slider 137 is retracted (direction 47b; Fig. 12c) in order to displace the yarn 14 creating a segment 14b under tension above the yarn-guiding loop 16.
  • the first slider 33 is lowered while the second slider 37 is displaced towards the left (direction 47c; Fig. 12d).
  • first slider 33 is made to rise again and the third slider 137 is made to advance (direction 47d; Fig. 12e) beyond the axis of the spindle 11, so that first the yarn may be inserted inside the end of the loop 16, and then to detach the yarn 14.
  • the first slider 33 is made to retract and descend.
  • the yarn re-connection assembly 49 is activated to make the join.
  • the yarn re-connection assembly 49 comprises (Figs. 1 and 15) an arm 50 suitable to rotate around a substantially horizontal axis 51 due to the action of an actuator 52 with a rod 53 hinged at 54 to the arm 50.
  • One end of the arm 50 is connected to the translating structure 23.
  • a rotatable plate 41 On the arm 50 there is a rotatable plate 41 on which is mounted a gripper organ 55 with two jaws 42, driven by respective actuators 92, and a cutting organ 57, consisting of shears 58 and a relative actuator 59.
  • the joining cycle provides that the re-connection assembly 49 is taken near the yarn 14 maintained under tension above the spindle 11 by the aspiration tube 31 in order to capture it.
  • the command of the re-connection assembly 49 is advantageously governed by a velocity controller in order to ensure that the yarn 14 is captured in the most delicate possible manner, in order to avoid all risk of breakages.
  • the re-connection assembly 49 rotates towards the right, as shown in this case (Fig. 16a), or towards the left, according to where the join is with respect to the outlet cylinder 20.
  • an optical sensor detects the presence or absence of the lever system 107 of the straightening assembly 19, according to the position assumed by the movable trolley 21, and detects whether the re-connection cycle must be made on the right side or left side of the spindle 11.
  • the re-connection assembly 49 is straightened (Fig. 16b) to bring the yarn 14 held between the jaws 42 arriving from the spool fitted to the spindle 11 next to the yarn 114 fed from the straightening assembly 19 and whose end is maintained under aspiration inside an aspiration tube 46.
  • the brake of the spindle 11 is released, the spindle 11 starts rotating again, and the plate 41 rotates to introduce the yarn 14 into the straightening zone.
  • the plate 41 rotates so that it does not interfere with the straightening cylinder 20 during the return of the rotary arm 50 to its initial position.
  • a further end-of-cycle procedure may provide to verity the continuity of the yarn by means of a photocell which allows the device 10 to be released from the spindle 11 and to start again to monitor other spindles 11 of the spinning machine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP99110098A 1998-05-27 1999-05-25 Verfahren und Vorrichtung zum Wiederverbinden des formierenden Garnes in einer Spinnmaschine Withdrawn EP0960964A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD980088 1998-05-27
ITUD980088 IT1299799B1 (it) 1998-05-27 1998-05-27 Procedimento di riattacco automatico del filo in formazione in un filatoio e relativo dispositivo.

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EP0960964A1 true EP0960964A1 (de) 1999-12-01

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EP (1) EP0960964A1 (de)
IT (1) IT1299799B1 (de)

Cited By (3)

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WO2009152933A1 (de) * 2008-06-21 2009-12-23 Oerlikon Textile Gmbh & Co. Kg Textilmaschine mit einem verfahrbaren serviceaggregat
CN102704078A (zh) * 2012-07-06 2012-10-03 常熟市石油固井工具有限公司 带摄像功能的纺织机
CN116929933A (zh) * 2023-09-15 2023-10-24 平原恒丰纺织科技有限公司 一种纺织纱线性能测试装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3748054B1 (de) * 2019-06-06 2023-02-22 Lakshmi Machine Works Ltd. Ringspinnmaschine mit einer automatischen fadenanspinnanordnung und einer kippvorrichtung für eine fadenführung für die automatische fadenanspinnanordnung
CN114687027B (zh) * 2022-03-31 2023-05-23 杭州君辰机器人有限公司 寻线装置及具有其的寻线设备

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DE2612660A1 (de) * 1975-10-03 1977-04-07 Cognetex Spa Automatische ringlaeufervorrichtung zum auffinden und anlegen von gebrochenen faeden in spinnmaschinen fuer textilfasern von woll- oder baumwollaenge
JPS57184073A (en) * 1981-05-01 1982-11-12 Murata Mach Ltd Method of detecting an end breakage in knotter carriage
JPS61282436A (ja) * 1985-06-04 1986-12-12 Toyoda Autom Loom Works Ltd 糸継ぎ機の糸リザ−ブ装置
EP0388938A1 (de) * 1989-03-22 1990-09-26 Maschinenfabrik Rieter Ag Verfahren zum Betrieb einer Spinnmaschine sowie Bedienroboter zur Durchführung des Verfahrens
EP0391110A2 (de) * 1989-03-22 1990-10-10 Maschinenfabrik Rieter Ag Verfahren und Vorrichtung zum Einfädeln eines an einem Garnträger angewickelten Fadens in einer Spinnmaschine
DE4010113A1 (de) * 1990-03-29 1991-10-02 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum selbsttaetigen fadenansetzen an ringspinnmaschinen
EP0518029A1 (de) * 1991-06-12 1992-12-16 Zinser Textilmaschinen GmbH Verfahren und Vorrichtung zum Suchen eines Fadenendes oder Aufwerfen eines Hilfsfadens an einem Kops bzw. an einen Kops oder eine leere Hülse

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JPS57184073A (en) * 1981-05-01 1982-11-12 Murata Mach Ltd Method of detecting an end breakage in knotter carriage
JPS61282436A (ja) * 1985-06-04 1986-12-12 Toyoda Autom Loom Works Ltd 糸継ぎ機の糸リザ−ブ装置
EP0388938A1 (de) * 1989-03-22 1990-09-26 Maschinenfabrik Rieter Ag Verfahren zum Betrieb einer Spinnmaschine sowie Bedienroboter zur Durchführung des Verfahrens
EP0391110A2 (de) * 1989-03-22 1990-10-10 Maschinenfabrik Rieter Ag Verfahren und Vorrichtung zum Einfädeln eines an einem Garnträger angewickelten Fadens in einer Spinnmaschine
DE4010113A1 (de) * 1990-03-29 1991-10-02 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum selbsttaetigen fadenansetzen an ringspinnmaschinen
EP0518029A1 (de) * 1991-06-12 1992-12-16 Zinser Textilmaschinen GmbH Verfahren und Vorrichtung zum Suchen eines Fadenendes oder Aufwerfen eines Hilfsfadens an einem Kops bzw. an einen Kops oder eine leere Hülse

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009152933A1 (de) * 2008-06-21 2009-12-23 Oerlikon Textile Gmbh & Co. Kg Textilmaschine mit einem verfahrbaren serviceaggregat
DE102008029575A1 (de) * 2008-06-21 2009-12-24 Oerlikon Textile Gmbh & Co. Kg Textilmaschine mit einem verfahrbaren Serviceaggregat
CN102066629B (zh) * 2008-06-21 2013-03-13 欧瑞康纺织有限及两合公司 带有可移动服务组件的纺织机
CN102704078A (zh) * 2012-07-06 2012-10-03 常熟市石油固井工具有限公司 带摄像功能的纺织机
CN116929933A (zh) * 2023-09-15 2023-10-24 平原恒丰纺织科技有限公司 一种纺织纱线性能测试装置
CN116929933B (zh) * 2023-09-15 2023-12-01 平原恒丰纺织科技有限公司 一种纺织纱线性能测试装置

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IT1299799B1 (it) 2000-04-04

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