EP0510292A1 - Device for the automatic tying of roving in a continuous spinning machine - Google Patents

Device for the automatic tying of roving in a continuous spinning machine Download PDF

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Publication number
EP0510292A1
EP0510292A1 EP91830349A EP91830349A EP0510292A1 EP 0510292 A1 EP0510292 A1 EP 0510292A1 EP 91830349 A EP91830349 A EP 91830349A EP 91830349 A EP91830349 A EP 91830349A EP 0510292 A1 EP0510292 A1 EP 0510292A1
Authority
EP
European Patent Office
Prior art keywords
roving
spinning
reserve
processed
interruption
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.)
Withdrawn
Application number
EP91830349A
Other languages
German (de)
English (en)
French (fr)
Inventor
Paolo Gualchierani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gualchierani System Sas Di Sergio Gualchierani & C
Original Assignee
Gualchierani System Sas Di Sergio Gualchierani & C
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gualchierani System Sas Di Sergio Gualchierani & C filed Critical Gualchierani System Sas Di Sergio Gualchierani & C
Publication of EP0510292A1 publication Critical patent/EP0510292A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B65H2701/311—Slivers

Definitions

  • the invention relates to a device for use on continuous spinning machines, in particular ring spinning machines and equivalents.
  • spinning machines have a plurality of spinning units arranged along two fronts and fed with a roving coming from a bobbin suspended from a creel lying above the spinning units and extending the length of the machine.
  • the roving undergoes drawing and twisting to produce a yarn that is wound onto a tube fitted on a spindle belonging to the corresponding spinning unit.
  • the roving of one bobbin is exhausted, it must be replaced by the roving of a supply bobbin.
  • spinning machines have creels from which supply bobbins can be suspended so as to get the roving of the supply bobbin ready in position beforehand to be manually joined to the tail end of the roving that is about to run out.
  • the operation of tying new roving to the exhausted roving is an operation which at present is performed manually, after the spinning unit has been stopped by the signal from a special sensor that detects the exhaustion of the roving that is currently being processed.
  • the spinning unit can also be interrupted if roving that is being fed breaks.
  • the object of the present invention is a device and a method for the automatic tying of roving in a continuous spinning machine, which solve the disadvantages of the manual method used at present.
  • the device comprises detection means for detecting an interruption in the feed of roving that is being processed and means for engaging and advancing, in time, reserve roving when the detection means detect an interruption in the feed of the roving that is being processed.
  • detection means detect an interruption in the roving that is currently being processed (due to the roving's being exhausted or breaking)
  • means are activated that engage, that is hold, the end of the reserve roving and pull it out in time to a sufficient length to insert the reserve roving into the cylinder system of the spinning machine; since the spinning operation is not interrupted, the rotation of the cylinders of the cylinder system of the corresponding spinning unit finishes pulling the exhausted or interrupted roving and simultaneously begins pulling and feeding the new roving to the drawing and twisting unit.
  • the operator is no longer required to intervene in time to tie the reserve rovings on where the roving that is being processed has run out, but may limit himself to replacing the exhausted bobbins with other full supply bobbins at his convenience, while each spinning unit processes the reserve roving.
  • the means for engaging and advancing, in time, the reserve roving may comprise a shaped part that has two alternative seats for the passage of the roving that is being processed, and a surface able to interact with pressure means for grasping and pulling the reserve roving.
  • This shaped part may be made in a substantially cylindrical shape with two flats or seats, offset axially and angularly. The two flats form the seats for the passage of the roving that is being processed and for the reserve roving.
  • the roving that is currently being processed runs through one of the two seats or flats, while the supply roving is held between the cylindrical surface of the part and a pressure means, for example a wheel, or other pressure means such as for example an elastic plate.
  • a pressure means for example a wheel, or other pressure means such as for example an elastic plate.
  • the reserve roving is free to run through the second of the two offset flats or seats provided in the cylindrical part. Meanwhile, the advancing of the reserve roving caused by the rotation of the cylindrical part has brought the end of said roving into the throat formed by the cylinders of the cylinder system of the spinning unit, so that the new roving begins to be pulled by said cylinder system towards the roller system, where it joins itself to the rearmost end of the exhausted roving.
  • one motor means for example a stepping motor
  • a single length of roving is wound onto each bobbin and fed to a corresponding spinning unit.
  • the motor means associated with the device according to the invention enables the exhausted or broken roving that is being processed to be replaced by a supply roving.
  • two lengths of roving are wound onto each bobbin and then fed to two spinning units adjacent to each other on the same front of the spinning machine. In this case it is possible for a motor means to be provided for each pair of spinning units.
  • the device according to the invention replaces both the rovings that are being processed with the two corresponding supply rovings, the two rovings that are being processed coming from one bobbin and the two supply rovings coming from the second bobbin.
  • a connection may be provided between one or more automatic roving tying devices and a drive shaft of the spinning machine, with a friction clutch or equivalent being interposed which is activated by a command generated by the signal coming from the means for detecting the breaking or exhaustion of roving.
  • a direct and independent connection may be provided between each device and the spinning machine's shaft, with a corresponding clutch controlled by the corresponding detection means.
  • a great simplification of the installation is achieved, however, by providing a single clutch that simultaneously activates all the automatic tying devices belonging to one front of spinning units in the machine, or at least to one sector of the front, comprising a plurality of spindles.
  • the roving that is being processed is replaced with supply roving on all the spinning units of one sector or of an entire front of the spinning machine when just one of the rovings that are being processed runs out or breaks.
  • the invention also relates to a method for the automatic tying of the roving in a continuous spinning machine as claimed in the appended claims.
  • the cylinders 1 and 3 of the cylinder system form a throat into which a roving S1 is passed from a bobbin (not shown) suspended from the creel of the spinning machine.
  • a roving S1 is passed from a bobbin (not shown) suspended from the creel of the spinning machine.
  • the roving S1 is guided in a corresponding channel 5 slightly tapering towards the cylinder system 1, 3.
  • a shaped cylindrical part 7, described in greater detail later which interacts with two wheels 9 and 11 carried by an arm 13 articulated at 15 to the structure 17 of the frame over the spinning machine.
  • the wheels 9 and 11 turn idly on an axle 19 and can be moved from the position shown in solid lines in Fig. 1 and in Fig. 2 to the position in broken lines in Fig. 1 where it is indicated by 11X, for manual positioning of the roving.
  • the shaped cylindrical part 7 is supported by an axle 20 attached to the structure 17 of the frame and has two flats 21 and 23 which are offset axially and angularly. More particularly, as can be seen in Fig. 3, the flats 21 and 23 are displaced to the left and to the right, respectively, of the midplane perpendicular to the axle of the cylindrical part 7. In addition, the flat 21 is angularly offset by 180° from the flat 23 for the purposes indicated below.
  • the cylindrical part 7 is integral with a toothed wheel 25 that engages with a pinion 27 keyed to the output shaft of a motor 29.
  • the device works as follows. In normal operating conditions the roving S1 is fed through the cylinder system 1, 3 to the drawing and twisting area of the spinning machine and passes under the wheel 9 which bears on the cylindrical surface of the part 7, by passing through the free space left by the flat 21.
  • sensor means diagrammatically indicated by 31 and 33, which may consist of an optical system comprising a photodiode and a phototransistor, as indicated diagrammatically in the example of the drawing, or by a microswitch with an arm that maintains contact with the roving S1.
  • the device according to the invention replaces the roving S1 that is being processed with a reserve roving SR, whose head end was already in position in the channel 5 and is wound on a reserve bobbin (not shown) suspended from the creel of the spinning machine.
  • the tying of the reserve roving SR is performed by means of the motor 29, which is set in rotation by a command caused by the signal generated by the detection means 31, 33.
  • the rotation of the motor 29 is such as to cause the cylindrical part 7 to perform a rotation through about 180°.
  • This rotation means that the flat 21 initially located in the front area moves into the back area by rotating in the direction of the arrow f (Fig. 1).
  • the residual roving S1 is therefore pinched between the wheel 9 and the cylindrical surface C of the cylindrical part 7.
  • the roving SR which was initially pinched between the cylindrical surface C and the wheel 11, is pulled and thus made to advance by the rotation of the cylinder 7 towards the spinning area, far enough to bring the end E (Fig. 2) of the roving SR into the throat formed by the cylinders 1 and 3 of the cylinder system of the corresponding spinning unit.
  • the reserve roving SR now lies in the free space between the wheel 11 and the flat 23 which, after the rotation in the direction f, will be positioned in the front part of the device.
  • the cylinder system 1, 3 has continued to feed the roving S1 that is about to run out and has begun pulling the reserve roving SR which, when the cylindrical part 7 stops rotating, is free to unwind from the corresponding bobbin and to feed the spinning unit which continues to produce the yarn without interruption.
  • the tail end of the roving S1 and the head end of the roving SR are united in the drawing and twisting area below by the rolling members or other equivalent members, not shown, of a type known per se.
  • two connected devices are shown associated with two corresponding spinning units.
  • This is in fact an illustrative embodiment on a wool spinning machine, where two rovings S1 are unwound from the same bobbin and fed to two adjacent spinning units, each of which is equipped with its own automatic roving tying device.
  • the reserve rovings SR shown in Fig. 2 both come from a supply bobbin.
  • the motor 29 controls the rotation of two cylindrical parts 7, so that the exhaustion or breaking of one or other of the two rovings S1 causes the replacement with and tying on of both the rovings SR.
  • the motor 29 may be omitted and the cylindrical part 7 may be activated by a friction clutch or the like, drawing its motion directly from a rotating shaft of the spinning machine, with the clutch being controlled by a signal caused by the detection of an interruption to the feed of roving S1 by the detection means 31, 33.
  • the device of the invention can be used also for automatically stop working of each single working unit in case the yarn being wound onto the tube fitted onto the spindle breaks.
  • sensor devices are provided between the output of the drawing and twisting area and the spindle.
  • 51 denotes a light source, such as a photodiode
  • 53 denotes a light detector means, for example a phototransistor.
  • the yarn y travels between sensor means 51, 53 before being wound onto the tube (not shown). If the yarn y breaks, a signal is caused to be generated by sensor means 51, 53. Said signal causes a reverse rotation of motor 29, in order to stop the feeding of the roving. This suddenly interrupts the working of the unit, and thus accumulation of yarn downstream of the drawing and twisting area is avoided.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP91830349A 1991-04-22 1991-08-13 Device for the automatic tying of roving in a continuous spinning machine Withdrawn EP0510292A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI910090A IT1247005B (it) 1991-04-22 1991-04-22 Dispositivo per l'attacco automatico dello stoppino in un filatoio continuo
ITFI910090 1991-04-22

Publications (1)

Publication Number Publication Date
EP0510292A1 true EP0510292A1 (en) 1992-10-28

Family

ID=11349585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91830349A Withdrawn EP0510292A1 (en) 1991-04-22 1991-08-13 Device for the automatic tying of roving in a continuous spinning machine

Country Status (2)

Country Link
EP (1) EP0510292A1 (it)
IT (1) IT1247005B (it)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2403718A1 (de) * 1974-01-26 1975-07-31 Schlafhorst & Co W Automatische kreuzspulmaschine mit einer mehreren faeden zuzuordnenden knotvorrichtung
DD235085A1 (de) * 1985-03-04 1986-04-23 Textima Veb K Verfahren und vorrichtung zum fadenanlegen an ringspinnmaschinen
DE3911505A1 (de) * 1989-04-08 1990-10-18 Schlafhorst & Co W Verfahren und spulstelle zum herstellen einer fehlerfreien kreuzspule

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2403718A1 (de) * 1974-01-26 1975-07-31 Schlafhorst & Co W Automatische kreuzspulmaschine mit einer mehreren faeden zuzuordnenden knotvorrichtung
DD235085A1 (de) * 1985-03-04 1986-04-23 Textima Veb K Verfahren und vorrichtung zum fadenanlegen an ringspinnmaschinen
DE3911505A1 (de) * 1989-04-08 1990-10-18 Schlafhorst & Co W Verfahren und spulstelle zum herstellen einer fehlerfreien kreuzspule

Also Published As

Publication number Publication date
ITFI910090A0 (it) 1991-04-22
ITFI910090A1 (it) 1992-10-22
IT1247005B (it) 1994-12-12

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