US3462936A - Stop motion for open end spinning machines - Google Patents

Stop motion for open end spinning machines Download PDF

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Publication number
US3462936A
US3462936A US652558A US3462936DA US3462936A US 3462936 A US3462936 A US 3462936A US 652558 A US652558 A US 652558A US 3462936D A US3462936D A US 3462936DA US 3462936 A US3462936 A US 3462936A
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United States
Prior art keywords
spinning
yarn
units
machine
unit
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Expired - Lifetime
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US652558A
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English (en)
Inventor
Miroslav Boucek
Frantisek Pospisil
Jiri Elias
Miloslav Tyl
Karel Mikulecky
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Vyzkumny Ustav Bavlnarsky AS
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Vyzkumny Ustav Bavlnarsky AS
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/42—Control of driving or stopping
    • D01H4/44—Control of driving or stopping in rotor spinning
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/42—Control of driving or stopping

Definitions

  • a spinning machine having a plurality of spinning units each comprising a spinning chamber, supply means for supplying fibrous material to the spinning chamber for conversion into a filament, and withdrawing means for withdrawing the filament from the spinning chamber.
  • Detecting means is associated with at least one of the units and is active for detecting a trailing end of the particular filament originated in the spinning chamber of the one unit subsequent to termination of the supply of fibrous material to the spinning chambers of all units, and an operative connection is provided between the detecting means and the withdrawing means of all units for terminating the operation of the withdrawing means in response to detection of the trailing end by the detecting means associated with the one unit.
  • the present invention relates to spinning machines in general and more particularly to spinning machines for the spindleless spinning of fibrous materials. Still more particularly, the present invention relates to an arrangement for determining the location of a trailing filament end in a spinning unit of such a spinning machine under predetermined conditions which will be discussed subsequently.
  • Spinning machines which comprise spinning units for the spindleless spinning of fibrous materials into filaments.
  • Each of these units of which a single spinning machine may comprise two hundred or more, includes a feeding mechanism for supplying fibrous material, a spinning mechanism for converting the fibrous material into a filament, and a filament winding mechanism which winds up the filament being spun in the spinning mechanism. It is well known that during operation of the respective spinning units, yarn-breakage or filament breakage will occur from time to time.
  • a tensile-type sensing device which indicates a yarn breakage as a function of a drop in the tension of the yarn which is being withdrawn by the take-up device.
  • such machines employ a timer such as a timedelay relay which terminates operation of the take-up device subsequent to termination of the supply device so that such fibrous material as is contained in the spinning chamber at the time the supply of additional fibrous material is interrupted, can be converted into filament.
  • a timer such as a timedelay relay which terminates operation of the take-up device subsequent to termination of the supply device so that such fibrous material as is contained in the spinning chamber at the time the supply of additional fibrous material is interrupted, can be converted into filament.
  • a trailing end of the filament will begin to move out of the spinning chamber in the direction towards the take-up device.
  • all of the trailing ends of the filaments in the various spinning units of the machine should stop at substantially the same distance from the spinning chamber of the respective unit as all of the other trailing ends.
  • the present invention provides an arrangement wherein the location of all trailing yarn ends in all of the units of the machine is precisely determined.
  • the arrangement according to the present invention is very inexpensive and is simple enough so that it can be added not only to spinning machines being newly constructed but to existing spinning machines without requiring significant technological or economic expenditures.
  • one feature of our invention comprises the provision of an improvement in a spinning machine, particularly a spining machine for the spindleless spinning of fibrous material into filaments.
  • a spinning machine includes a plurality of individual spinning units each of which comprises a spinning means adapted to continuously spin fibrous material into a filament, supply means for continuously supplying fibrous material to the spinning means of the respective unit, and withdrawing means operative for continuously and in a predetermined path withdrawing from such spinning means the spun filament which originates therein.
  • Our improvement consists in the provision of detecting means which is associated with one of the individual spinning units and which is active for detecting a trailing end of the particular filament which originates in the spinning means of such unit subsequent to determination of this supply of fibrous material to the spinning means of all of the units.
  • FIG. 1 illustrates diagrammatically a multi-unit spinning machine incorporating our invention
  • FIG. 2 illustrates, also diagrammatically, one of the units of the machine shown in FIG. 1, which unit is not, however, provided with the arrangement according to the present invention
  • FIG. 3 is largely similar to FIG. 2, but illustrates a unit which is provided with the arrangement according to the present invention.
  • FIG. 4 is a detail view of the positional-type detecting means employed in the unit shown in FIG. 3 and in accordance with the present invention.
  • FIG. 1 the multi-unit machine shown in this figure is assumed to comprise a plurality of individual units, of which four are actually shown.
  • Each of these units comprises a feeding or supply mechanism 1 which serves to feed a sliver 2 consisting of a fibrous material from a supply 3 and into the associated spinning mechanism or chamber 4.
  • the construction and operation of the spinning mechanism 4 is disclosed in the aforementioned copending applications and need therefore not be further discussed.
  • each spinning mechanism 4 is constituted by a chamber which is rotated about a predetermined axis and onto an inner surface of which the sliver 2 is fed. By contact with this inner surface, and under the influence of the centrifugal forces, the sliver is converted into a yarn or filament 6 which is withdrawn from an outlet of the spinning chamber 4 and wound up by a take-up or winding mechanism 7.
  • each of the spinning chambers 4 is provided with a yarn guiding tube 5 which extends downstream from the outlet of the respective chamber 4, that is which extends in the direction in which the yarn moves towards the take-up 7.
  • the take-up 7 is operatively connected with a priming mechanism 8 whose construction and operation are detailed in the aforementioned copending application Ser. No. 582,473.
  • a tensile-type sensor 9 Arranged between the priming mechanism 8 and the yarn guide tube 5 is a tensile-type sensor 9 which is schematically illustrated in FIG. 2 and whose operation is both well known and evident from that figure. It will be clear from considering the element 9 in FIG. 2 that it comprises a suitable switch, which in the illustrated embodiment is seen to be normally open, whose operation is controlled in dependence upon the deflection of a tiltable lever or similar member, which engages the yarn 6.
  • the lever in the embodiment illustrated in FIG. 2 can tilt towards the right, permitting the switch to close to thereby originate a signal which may, via the electrical circuit, illustrated in phantom lines in FIG.
  • the operator who has been summoned by the signal produced via the tensile-type detector 9, manually reprimes by withdrawing yarn from the take-up device and reintroducing the trailing end of the yarn into the spinning chamber 4. There, the trailing end is linked up with the newly-forming yarn by coming into contact with the inner surface of chamber 4 on which the sliver, which is now again being introduced into the chamber 4, is deposited.
  • the tensile-type detector 9 is again placed into detecting position, that is the switch thereof is opened, and withdrawal of yarn from the chamber 4 with subsequent winding onto the take-up device 7 is resumed.
  • the length of the yarn guide tube 5 can only be on the order of centimeters and it is evident that precise and quick control of each unit must be assured if the trailing yarn end, which results when the breakage occurs because of termination of supply of fibrous material to the respective spinning chambers 4, is to remain within the respective yarn guide tubes 5.
  • This is essential because otherwise the priming mechanism 8 illustrated in FIG. 1 and FIG. 3 could not properly operate, it being evident that on automatic return movement of the yarn 6 located downstream of the guide tube 5, that is movement which is not supervised or eflected by the machine operator, the likelihood is great that the trailing end portion of the yarn 6 would not reenter the tube 5 for proper return into the associated spinning chamber 4. Such an occurrence would negate the value of the priming mechanism 8 and would necessitate manual priming.
  • FIG. 3 shows the arrangement shown in FIG. 3 as not essential to an understanding of the invention. This is also true of the electrical circuit.
  • FIG. 3 shows the priming mechanism 8 in schematic form and it is again emphasized that such priming mechanism is disclosed in the copending application, Ser. No. 582,473.
  • the tensile-type sensor or detector 9 is present in the unit shown in FIG. 3, just as in all of the other units of the machine illustrated in FIG. 1.
  • the unit shown in FIG. 3 is provided with a positional-type detector 10, which in the illustrated embodiment consists of a photo-electric cell and a source of radiation which are located on opposite sides of the tube 5 in juxtaposition with two aligned openings 5 so that radiation originating in the source of radiation can pass through these openings across the passage defined within the tube 5, and can be registered by the photoelectric cell.
  • Detectors of this type are not new, of course, and the illustration of this detector in FIG. 3 is therefore only schematic. It will be clear that the arrangement is such that no radiation can pass from the source across the passage of tube 5 and to the photoelectric cell while the yarn 6 passes uninterruptedly through the tube 5.
  • FIG. 4 when a break occurs and as soon as the trailing end of the yarn 6 has passed beyond the aligned openings '5,
  • the detector 10 determines at once the existence of a break and acts, by means of an operative connection which is not particularly illustrated, because it will be obvious to all those who are skilled in the art, to immediately stop both the take-up mechanism 7 and the drive for the spinning chamber 4.
  • stopping of the yarn advance is determined by the rapidity with which the take-up mechanism 7 can be stopped, for which purpose a suitable brake or the like may be provided, and it is the length of time required for stopping of the take-up mechanism 7 which largely determines the length of the yarn guidance tube 5 which, as already pointed out earlier must be suflicient so that the trailing end of the yarn remains within the tube when the takeup mechanism 7 is finally stopped.
  • the schematic circuit arrangement shown in FIG. 2 illustrates a switch 14 which will be assumed to be the main switch controlling operation of the entire machine shown in FIG. 1.
  • the positional detector 10 is operatively connected in such a manner with the main switch 14 that it is de-activated when the switch 14 is opened.
  • the present invention provides not only a single one of the units with the detector 10, but to provide two or even several of the units with such detectors 10.
  • the entire machine that is all units thereof, is still only controlled by a single one of the detectors 10 in the manner in which this has been described herebefore.
  • the second or additional detectors 10 are provided only for back-up purposes, that is they are intended to become operative only if the initial detector 16 should fail because of damage or malfunction.
  • a spinning machine particularly for spindleless spinning of fibrous material into filaments, wherein a plurality of individual spinning units each comprise a spinning means adapted to continuously spin fibrous material into a filament, supply means for continuously supplying fibrous material to such spinning means, and withdrawing means operative for continuously and in a predetermined path withdrawing from such spinning means the spun filament originating therein
  • the improvement consisting in the provision of a plurality of first detecting means each associated with one of said units and each active for detecting filament breakage in the respective unit in response to a drop in the tension of the filament being withdrawn; second detecting means associated with one of said units and active for detecting, subsequent to termination of the supply of fibrous material to the spinning means of all of said units, a trailing end of the particular filament originating in the spinning means of said one unit; a first operative connection between each of said first detecting means and the supply means and withdrawing means of the respectively associated unit for terminating operation of both thereof in response to detection by the respective first detecting means of a drop in the tension
  • actuating means connected with said withdrawing means and operable for initiating and for terminating operation thereof; a third operative connection between said actuating means and said second detecting means for activating the latter in response to operation of said actuating means in a sense terminating operation of said withdrawing means; and a fourth operative connection between said actuating means, said first detecting means and said second detecting means for activating said first detecting means in response to operation of said actuating means in a sense initiating operation of said withdrawing means and for simultaneously deactivating said second detecting means.
  • said first detecting means being positioned adjacent said predetermined path intermediate said withdrawing means and said spinning means of the respective unit, and said second detecting means being positioned adjacent said predetermined path intermediate the first detecting means and said spinning means of said one unit proximal to said spinning means thereof.
  • said second detecting means comprises a positional-type detector arranged for sensing the position of said trailing end.
  • said second detecting means comprises a photoelectric cell.
  • the respective spinning means each comprise a spinning chamber having an outlet, and wall means extending downstream of said spinning chamber in registry with said outlet thereof and surrounding an increment of said path so as to define a yarn guide passage, said second detecting means being mounted adjacent said increment intermediate the ends thereof.
  • said wall means is tubular and is provided with a pair of aligned transverse apertures
  • said second detecting means comprising a photo-electric cell arranged on one side of said wall means opposite one of said apertures, and a source of radiation arranged on the other side of said wall means opposite the other aperture.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US652558A 1965-12-01 1967-07-11 Stop motion for open end spinning machines Expired - Lifetime US3462936A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS719465 1965-12-01

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US (1) US3462936A (no)
AT (1) AT260072B (no)
BE (1) BE690268A (no)
CH (1) CH454686A (no)
DE (1) DE1560340A1 (no)
ES (1) ES333983A1 (no)
FR (1) FR1504859A (no)
GB (1) GB1166055A (no)
SE (1) SE309737B (no)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3541774A (en) * 1968-01-25 1970-11-24 Elitex Zavody Textilniho Control apparatus for starting,stopping,and priming a spinning machine
US3601969A (en) * 1968-02-02 1971-08-31 Toray Industries Method and apparatus for performing an open-end spinning operation
US3635413A (en) * 1969-12-29 1972-01-18 Hercules Inc Break detection and correction system for threadlike materials
US3643414A (en) * 1969-03-10 1972-02-22 Elitex Z Textilhino Strojirens Checking mechanism for detecting yarn breakages in open end spinning machines
US3667205A (en) * 1969-03-07 1972-06-06 Ozdian Josef Mechanism for withdrawing and winding yarn in spinning units
US3678673A (en) * 1969-08-08 1972-07-25 Elitex Zavody Textilniho Device for the mass spinning-in of spinning units in spindleless spinning machines
US3685270A (en) * 1969-05-05 1972-08-22 Skf Kugellagerfabriken Gmbh System of spinning yarn
US3704579A (en) * 1970-04-18 1972-12-05 Toyoda Automatic Loom Works Practical method and apparatus for driving an open-end spinning frame
US3782089A (en) * 1970-11-28 1974-01-01 Schubert & Salzer Maschinen Apparatus for piecing-up yarn in an open-end-spinning device
US3803823A (en) * 1970-11-28 1974-04-16 Schubert & Salzer Maschinen Control apparatus for textile machinery
US3854274A (en) * 1971-06-21 1974-12-17 Skf Kugellagerfabriken Gmbh Method and apparatus for joining broken ends
DE2642346A1 (de) * 1975-10-07 1977-04-21 Vyzk Ustav Bavlnarsky Verfahren zum abstellen der abzugs- und aufwickeleinrichtung der spinnstellen einer offen-end-spinnmaschine und einrichtung zum durchfuehren des verfahrens
DE3021425A1 (de) * 1979-06-06 1980-12-18 Toyoda Automatic Loom Works Spinneinheiten einer offen-end-spinnmaschine
US4296528A (en) * 1978-07-13 1981-10-27 Shlykov Gennady N Drawing mechanism

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354631A (en) * 1964-04-20 1967-11-28 Vyzk Ustav Bavlnarsky Method and apparatus for preventing interruption of a spinning process during breakage of the spun thread

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354631A (en) * 1964-04-20 1967-11-28 Vyzk Ustav Bavlnarsky Method and apparatus for preventing interruption of a spinning process during breakage of the spun thread

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3541774A (en) * 1968-01-25 1970-11-24 Elitex Zavody Textilniho Control apparatus for starting,stopping,and priming a spinning machine
US3601969A (en) * 1968-02-02 1971-08-31 Toray Industries Method and apparatus for performing an open-end spinning operation
US3667205A (en) * 1969-03-07 1972-06-06 Ozdian Josef Mechanism for withdrawing and winding yarn in spinning units
US3643414A (en) * 1969-03-10 1972-02-22 Elitex Z Textilhino Strojirens Checking mechanism for detecting yarn breakages in open end spinning machines
US3685270A (en) * 1969-05-05 1972-08-22 Skf Kugellagerfabriken Gmbh System of spinning yarn
US3678673A (en) * 1969-08-08 1972-07-25 Elitex Zavody Textilniho Device for the mass spinning-in of spinning units in spindleless spinning machines
US3635413A (en) * 1969-12-29 1972-01-18 Hercules Inc Break detection and correction system for threadlike materials
US3704579A (en) * 1970-04-18 1972-12-05 Toyoda Automatic Loom Works Practical method and apparatus for driving an open-end spinning frame
US3782089A (en) * 1970-11-28 1974-01-01 Schubert & Salzer Maschinen Apparatus for piecing-up yarn in an open-end-spinning device
US3803823A (en) * 1970-11-28 1974-04-16 Schubert & Salzer Maschinen Control apparatus for textile machinery
US3854274A (en) * 1971-06-21 1974-12-17 Skf Kugellagerfabriken Gmbh Method and apparatus for joining broken ends
DE2642346A1 (de) * 1975-10-07 1977-04-21 Vyzk Ustav Bavlnarsky Verfahren zum abstellen der abzugs- und aufwickeleinrichtung der spinnstellen einer offen-end-spinnmaschine und einrichtung zum durchfuehren des verfahrens
US4104854A (en) * 1975-10-07 1978-08-08 Vyzkumny Ustav Bavlnarsky Dynamic yarn-braking arrangement for an open-end spinning machine
US4296528A (en) * 1978-07-13 1981-10-27 Shlykov Gennady N Drawing mechanism
DE3021425A1 (de) * 1979-06-06 1980-12-18 Toyoda Automatic Loom Works Spinneinheiten einer offen-end-spinnmaschine
US4334403A (en) * 1979-06-06 1982-06-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Spinning units in an open end spinning machine
DE3021425C2 (de) * 1979-06-06 1985-12-05 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Offen-End-Rotorspinnmaschine

Also Published As

Publication number Publication date
AT260072B (de) 1968-02-12
CH454686A (de) 1968-04-15
ES333983A1 (es) 1967-10-16
BE690268A (no) 1967-05-25
GB1166055A (en) 1969-10-01
FR1504859A (fr) 1967-12-08
DE1560340A1 (de) 1970-10-22
SE309737B (no) 1969-03-31

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