US3643413A - Mechanical checking device for controlling the operation of spinning unit - Google Patents

Mechanical checking device for controlling the operation of spinning unit Download PDF

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Publication number
US3643413A
US3643413A US13958A US3643413DA US3643413A US 3643413 A US3643413 A US 3643413A US 13958 A US13958 A US 13958A US 3643413D A US3643413D A US 3643413DA US 3643413 A US3643413 A US 3643413A
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United States
Prior art keywords
feeler
clutch
checking device
spinning unit
pawl
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.)
Expired - Lifetime
Application number
US13958A
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English (en)
Inventor
Brazda Ladislav
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.)
Elitex Zavody Textilniho
CERVENY KOSTELEC
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Individual
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Filing date
Publication date
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Publication of US3643413A publication Critical patent/US3643413A/en
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    • 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
    • D01H13/18—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 stopping supply only
    • D01H13/187—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 stopping supply only using means stopping the driving of the drafting, guiding cylinders, e.g. friction clutches
    • 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

Definitions

  • the checking device includes a feeler which is freely movable from a first position in which it engages the yarn being pulled under tension from the spinning unit to a second position when such yarn breaks. Fibrous material is fed into the spinning unit by a driven roller, there being a controllable clutch interposed between such roller and a driving means. The clutch remains engaged when the feeler is in its first position; when the yarn breaks, however, the feeler acts mechanically effectively to disengage the clutch and to stop the feeding of fibrous material into the spinning unit.
  • the present invention relates to a mechanical checking device for controlling the operation of a spinning unit for manufacturing yarn.
  • the device may be used to advantage, for example, in spinning yarn by a pneumomechanical method, particularly by means of an underpressure spinning chamber.
  • Checking devices of the type with which the present invention is concerned control the spinning function ofthe spinning unit, particularly to start the feeding of fibrous material into the spinning unit when there is continuous withdrawal of the produced yarn from the spinning unit and stop the feeding of material into such unit in the case of yarn breakage, when the danger of accumulation of fibrous material in the spinning chamber arises.
  • the mechanism according to the present invention has the purpose to mitigate the above disadvantages and thus contribute to higher operation reliability and applicability of spinning machines, particularly but not exclusively those operating on the pneumomechanical principle of manufacturing yarn by means ofa spinning chamber operated under pressure.
  • the mechanism according to the present invention includes a freely swingable feeler which is positioned in the yarn path, a mechanical driving coupling operated by the feeler in dependence of the presence or absence of yarn, and an interposed driving mechanism for the feeding roller for feeding fibrous material into the spinning unit, the absence of yarn in the yarn delivery path from the spinning unit stopping the feeding of fibrous material into the spinning unit.
  • FIG. 1 in the drawings shows a first embodiment of the mechanism according to the present invention in partial front elevation section during normal operations
  • FIG. .2 shows the embodiment of FIG. 1 upon yarn breakage
  • FIG. 3 shows a second embodiment of the mechanism according to the present invention in partial front elevation section during normal operation.
  • FIG. 4 is a detailed front elevation view of a third embodiment of the mechanism according to the present invention during normal operation.
  • FIG. 5 is a detailed view of the mechanism as shown in FIG. 4 upon yarn breakage.
  • a machine for manufacturing yarn by a pneumomechanical method consists of a large number of identical spinning units, each of which is equipped with a mechanism according to the present invention.
  • the drawings and the specification are limited to the showing and description of only one mechanism, certain parts of the spinning units, which are not directly related to the embodiment of this mechanism, not being shown for simplicity of illustration and description.
  • FIGS. l and 2 The first embodiment is shown in FIGS. l and 2, the second in FIG. 3, and the third in FIGS. Al and 5.
  • the mechanism according to the present invention shown in FIG. I and 2 consists of a feeler I, mounted freely swingably about a pivot pin 2 mounted on a fixed support.
  • a further, cross arm la of the feeler 1 is in contact with yarn 3, which comes out from the withdrawing tube 4 of a spinning unit (not shown) and is withdrawn in the direction of arrow S, by a pair of withdrawing rollers 5, 6.
  • On the main driving shaft 7 of the machine are firmly fixed tooth wheels or gears (one shown) 8 in a number corresponding to the number of spinning units on the machine.
  • the toothed wheel 8 of each spinning unit is in mesh with the driving part'of the securing coupling or clutch of the respective checking device.
  • Each such device includes a gear 9 mounted freely rotatably on the shaft 10 and pressed into engagement with the driven plate part ll of the coupling by means of a coil compression spring I6, which is secured on the shaft 10 by a cup 17 and a nut 17a screwed to shaft 10.
  • the plate part 11 of the coupling is. affixed to the shaft 10, which is mounted in bearings 12 and provided at its left-hand end with a gear 13, which is in mesh either directly or through another gear element (not shown) with a gear 14, which is connected with a feeding roller 15 for feeding fibrous material into the respective spinning in the direction of arrow 5
  • a gear 9 mounted freely rotatably on the shaft 10 and pressed into engagement with the driven plate part ll of the coupling by means of a coil compression spring I6, which is secured on the shaft 10 by a cup 17 and a nut 17a screwed to shaft 10.
  • the plate part 11 of the coupling is. affixed to the shaft 10, which is mounted in bearings 12 and provided at its left-
  • the driving part 9 of the clutch is made such that its front or left-hand surface is provided with semicylindrical recesses into which are inserted cylindrical elements 18, which connect the driving part 9 of the clutch with the driven part II by means of recesses in the right-hand face of the driven part Ill into which the cylindrical elements 18 fit.
  • the connecting elements I18 may be balls, cones, or of other suitable shape.
  • both the driving part 9 and the driven part ll of the securing coupling are provided with mutually engaged annular detents 22, thus forming a tooth coupling.
  • one of the further surfaces of the driven part II (or 11') of the securing coupling i.e., either the front surface 21 (as here shown) on the opposite side or the circumferential surface provided with a ratchet toothing, into which the shorter arm lb of feeler l is engaged in the case of breakage of the yarn 3 which is withdrawn from the spinning unit arm lb, functions as a pawl.
  • the mechanism according to the present invention works as follows:
  • the said feeler I is held by the tensioned yarn 3 at a position, at which its shorter arm lb is out of engagement with the ratchet surface 21 of the driven part II of the clutch.
  • the main shaft 7 turns, rotation of the shaft 7 being transmitted by the gear 8 mounted thereon to the freely rotatable driving part 9 of the clutch on the shaft 10.
  • Gear 9 is pressed by spring 16 into engagement with the driven part 11 of the clutch through the connecting elements 18 and recesses (FIG.
  • the part 9 of the clutch is rotatably driven by shaft 7; in normal operation part 9 drives part 11, shaft 10, gears 13, 14, and roll 15 through the clutch 9, 11 when rotation of part 11 is stopped, as above described, the connecting elements 18 repeatedly fall into and ride up out of the confronting recesses in part 11.
  • the force of engagement between the lower arm lb of feeler 1 on the ratchet surface 21 of the driven part 11 varies, due to the described sliding of the connecting means between the two parts of the coupling. Such force attains its minimum immediately after the elements 18 have ridden up out of the recesses in part 11.
  • the shorter arm lb of feeler 1 forms a control element, which is connected with a pawl 19 mounted with one of its ends also swingably about point 2.
  • the upper end of a flat leaf spring 20 presses against pawl 19; said spring is fastened at its lower end to a part 2011 of the body of the associated spinning unit.
  • the feeler I is swung out, in the case of yarn breakage, by its own weight in a counterclockwise direction 8,.
  • the lower end lb of feeler 1' stops acting upon the pawl 19 against the thrust of leaf spring 20, whereupon the pawl 19 is pressed by said spring 20 into a tooth of the ratchet surface 21 of the driven part 11 of the clutch.
  • the feeler 1' is tilted over in a clockwise direction, opposite to S in such manner, as to be in contact with yarn 3.
  • the advantage of the mechanism according to the present invention consists particularly in its simple construction, as well as in its immediate reaction to yarn breakage and its immediate restarting after removal of the yarn breakage. Any delay caused by dependence upon certain electric elements,
  • Yarn produced by the apparatus of the invention is characterized by its greater uniformity.
  • a mechanical checking device including a movable feeler normally held in a first terminal position by engagement of the feeler with unbroken spun yarn being fed from the spinning unit, the feeler being movable to a second terminal position upon the breakage of said spun yarn, a driving means, a normally engaged clutch interposed between the driving means and the rotatable driven means for feeding fibrous material into the spinning unit, and means operated by the feeler upon movement of the feeler toward its second terminal position for effectively disengaging the clutch and thereby stopping the means for feeding fibrous material into the spinning unit.
  • a mechanical checking device wherein the feeler is a lever freely swingable about a pivoted axis, the feeler having a yarn engaging portion adjacent its outer end.
  • a mechanical checking device wherein the clutch has a driving and a driven part, means yieldingly holding the driving and driven means together in driving engagement, the clutch being effectively disengaged when the driven part is held from rotation while the driving part continues to rotate, and the means operated by the feeler holds the driven part of the clutch from rotation upon movement of the feeler toward its second terminal position.
  • a mechanical checking device comprising a ratchet and a pawl for selectively retaining the driven part of the clutch from rotation, the ratchet being drivingly connected to the driven part of the clutch, and the pawl being operated by the feeler.
  • a mechanical checking device wherein the pawl is connected to the feeler.
  • a mechanical checking device according to claim 4, wherein the pawl is directly connected to the feeler so as to move therewith.
  • a mechanical checking device comprising resilient means constantly urging the pawl into engagement with the ratchet, and means operated by the feeler when the feeler is in its first terminal position for holding the pawl from engagement with the ratchet against the opposition of the resilient means.
  • a mechanical checking device wherein the feeler and pawl are connected by a common fixed pivot pin about which they oscillate, and wherein the means for holding the pawl from engagement with the ratchet comprises an arm on the feeler which engages and retracts the pawl from the ratchet as the feeler moves from its first toward its second terminal position.
  • a mechanical checking device according to claim 1, wherein the clutch is a coupling having releasably engaging toothed parts.
  • spinning unit manufactures yarn by a pneumomechanical method, said unit including a spinning chamber operating under pressure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US13958A 1969-03-06 1970-02-25 Mechanical checking device for controlling the operation of spinning unit Expired - Lifetime US3643413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS163669 1969-03-06

Publications (1)

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US3643413A true US3643413A (en) 1972-02-22

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US13958A Expired - Lifetime US3643413A (en) 1969-03-06 1970-02-25 Mechanical checking device for controlling the operation of spinning unit

Country Status (6)

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US (1) US3643413A (enExample)
JP (1) JPS4936050B1 (enExample)
CH (1) CH507386A (enExample)
DE (1) DE2009754A1 (enExample)
FR (1) FR2036672A5 (enExample)
GB (1) GB1291951A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011053811A1 (de) * 2011-09-21 2013-03-21 Rieter Ingolstadt Gmbh Spinnmaschine und Verfahren zur Unterbrechung der Garnherstellung an einer Spinnmaschine

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

Also Published As

Publication number Publication date
DE2009754A1 (enExample) 1970-09-17
JPS4936050B1 (enExample) 1974-09-27
FR2036672A5 (enExample) 1970-12-24
CH507386A (de) 1971-05-15
GB1291951A (en) 1972-10-04

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