EP0306691B1 - Device to control the piecing-up of yarn on spinning machines - Google Patents

Device to control the piecing-up of yarn on spinning machines Download PDF

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Publication number
EP0306691B1
EP0306691B1 EP88112207A EP88112207A EP0306691B1 EP 0306691 B1 EP0306691 B1 EP 0306691B1 EP 88112207 A EP88112207 A EP 88112207A EP 88112207 A EP88112207 A EP 88112207A EP 0306691 B1 EP0306691 B1 EP 0306691B1
Authority
EP
European Patent Office
Prior art keywords
spindle
belt
hereinbefore
wharve
fluid
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
Application number
EP88112207A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0306691A1 (en
Inventor
Mirko Marchiori
Danny Lant
Fabio Lancerotto
Umberto Gerin
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0306691A1 publication Critical patent/EP0306691A1/en
Application granted granted Critical
Publication of EP0306691B1 publication Critical patent/EP0306691B1/en
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/04—Spindles
    • D01H7/22—Braking arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/06—Spinning or twisting machines in which the product is wound-up continuously cap type
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/66—Cap arrangements

Definitions

  • This invention concerns a device to control the piecing-up of yarn on spinning machines.
  • the device according to the invention is suitable for spinning and twisting machines having a belt-type drive for the spindles.
  • the device can be employed advantageously, but not only, in spinning systems where the rotary yarn-winding means possesses a given weight and therefore a given inertia to angular acceleration, such as is the case, for instance, in some cap spinning systems, in rotary ring spinning systems and in spinning systems employing a rotary balloon checking device.
  • the brake shoe is separated at once from the spindle wharve and the drive belt can apply all its available power to the spindle.
  • the spindle accelerates very quickly and reaches its normal running speed in a very short time.
  • the tension created is so great that it very often overcomes the strength of the yarn.
  • the operative is busy all the time with the braking task and with a gradual start-up of the spindle.
  • GB-A-193,131 mentions improvements in and relating to stop apparatus for the spindles of spinning and twisting machines.
  • the mentioned stop apparatus has only two defined positions, which are defined by the spring pedal.
  • EP-A-0225660 describes a method and system for spinning with a rotary balloon-checking device.
  • This checking device or cap can be driven by an independent motor which is moved with a reciprocating vertical motion or be driven by a pulley cooperating with a belt.
  • US-A-2,833,111 discloses cap spinning frames and cap twisting frames which are driven by an electromotor.
  • the upper end of a rotatable vertical spindle is separately driven by another electromotor and projects into the interior of the cap.
  • controllable direct current ore reverse current or eddy corrent is supplied.
  • the present applicant has designed, tested and embodied a device able to overcome all the shortcomings of the known art.
  • the device according to the invention consists of an element to distance the drive belt of the spindle from the spindle wharve.
  • the distancing element is fitted in correspondence with the foot of the spindle and is able to rotate about the axis of the spindle.
  • This distancing element is worked by the machine operative by hand and has at least three defined working positions:
  • the operative When taking corrective action after a yarn breakage, the operative rotates the distancing element at once from the normal drawing position to the position of complete separation of the belt from the spindle wharve, thus halting the spindle.
  • the operative arranges, as in the known art, a segment of yarn of a length suitable for the piecing-up. He then rotates the distancing element to the intermediate position, waits for some moments and then carries out the piecing-up.
  • the spindle While the piecing-up is being carried out, the spindle gradually reaches its normal running speed and the operative can rotate the distancing element to the position for normal drawing of the spindle without altering the speed of rotation of the spindle. There are therefore no stresses applied to the yarn.
  • the device provides for the ability to vary the point of the intermediate position and therefore to vary the arc of contact between the belt and the spindle wharve so as to obtain different degrees of acceleration of the spindle.
  • a jet of fluid able to contribute to the drawing of the yarn winding means by the yarn may cooperate momentarily with the element that distances the spindle drive belt.
  • Such jet of fluid begins working in the neighbourhood of the intermediate position to assist the start-up of the spindle and ends its action when the normal running speed has been reached.
  • Figs.1a, 1b and 1c show brakes 10 of the prior art acting on a spindle wharve 11 set in rotation by a belt 12 in the direction of the arrow 13.
  • the brakes 10 are applied by the machine operative in the direction of the arrow 14 and work by the pressure of a rigid brake shoe 15 against the spindle wharve 11.
  • Resilient deformable elements 16 are employed to graduate the start-up of the spindle and act directly on the spindle wharve 11, or else the pressure of the brake shoe 15 is exerted by means of a spring 17 or other resilient means.
  • Figs.2a, 2b and 2c show an embodiment of the invention in the position of normal drawing of a spindle, in the intermediate position and in the position of full disengagement of the belt 12 from the spindle wharve 11 respectively.
  • a device 18 which controls the piecing-up of the yarn consists of a distancing element 19, in this example a sleeve, which is fitted at the foot of, and is coaxial with, a spindle 20 and is able to rotate.
  • the sleeve 19 comprises an upper body 21 positioned on the outside of the spindle wharve 11.
  • This upper body 21 is lacking along a circumferential portion corresponding to an angle of open space "alpha".
  • This angle of open space "alpha” is greater than an angle "beta” corresponding to the arc of contact of the belt 12 about the spindle wharve 11 when the sleeve 19 is in the position of normal drawing of the spindle 20 (see Fig.2a).
  • the actuation lever 22 bears terminally on its side towards the foot of the spindle 20 a pin 24 cooperating with the outer surface of a second sleeve 25.
  • An abutment 26 is machined on the second sleeve 25 and determines the intermediate position of the sleeve 19 coinciding with a limited extent of contact between the belt 12 and spindle wharve 11 (angle "beta 1" smaller than "beta” in Fig.2b).
  • Terminal parts 29 of the upper body 21 correspond with the angle of open space "alpha" and are suitably edged to assit introduction of the upper body 21 between the belt 12 and spindle wharve 11.
  • Fig.3 shows the application of the sleeve 19 to a spinning spindle, which in this example, is a spindle with a rotary balloon checking device 27.
  • a device 30 providing a jet of fluid which is advantageously compressed air, is shown with its essential parts in the diagram of Fig.3 and cooperates with the device 18 that controls the piecing-up of the yarn.
  • the device 30 providing the jet of fluid consists of a timer 31 to time the duration of the jet and is actuated by a cam 32, comprised in the sleeve 19, during the intermediate position of the sleeve (Fig.2b).
  • the timer 31 actuates a solenoid valve 33 connected to the feed of the fluid under pressure 34.
  • the fluid under pressure 34 cooperates momentarily through a nozzle 35 with a ring 36 fitted to the upper portion of the rotary balloon checking device 27.
  • the ring 36 has a very low weight and an outer surface 37 of a type, knurled for instance, which is suitable to assist the tangential thrust of the fluid.
  • the rotary yarn winding means 27 itself comprises an annular portion of knurled surface.
  • the device 30 providing a jet of fluid comprises also a pressure regulator with a pressure gauge 38 to regulate the thrust of the compressed air 34 suitably on the rotary balloon checking device 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP88112207A 1987-09-08 1988-07-28 Device to control the piecing-up of yarn on spinning machines Expired EP0306691B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8345487 1987-09-08
IT8783454A IT1214219B (it) 1987-09-08 1987-09-08 Dispositivo di controllo del riattacco del filato su filato.

Publications (2)

Publication Number Publication Date
EP0306691A1 EP0306691A1 (en) 1989-03-15
EP0306691B1 true EP0306691B1 (en) 1992-04-15

Family

ID=11322135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88112207A Expired EP0306691B1 (en) 1987-09-08 1988-07-28 Device to control the piecing-up of yarn on spinning machines

Country Status (4)

Country Link
EP (1) EP0306691B1 (it)
JP (1) JPH01111026A (it)
DE (1) DE3870108D1 (it)
IT (1) IT1214219B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0883703B1 (de) * 1996-02-28 2001-11-28 Vyzkumny ustav bavlnársky Spindelspinn- oder spindelzwirnverfahren und die arbeitseinheit zur durchführung des verfahrens

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB193131A (en) * 1921-11-15 1923-02-15 William Christopher Mcloughlin Improvements in and relating to stop-apparatus for the spindles of spinning and twisting machines
US2833111A (en) * 1955-10-20 1958-05-06 Spinnerei Karl Marx Veb Cap spinning frames and cap twisting frames
IT1218462B (it) * 1985-12-10 1990-04-19 Cerimates Spa Procedimento e sistema di filatura a limitatore di balloon rotante
DE3606609A1 (de) * 1986-02-28 1987-09-03 Zinser Textilmaschinen Gmbh Luntenstopp-vorrichtung am streckwerk einer spinnmaschine

Also Published As

Publication number Publication date
IT8783454A0 (it) 1987-09-08
JPH01111026A (ja) 1989-04-27
EP0306691A1 (en) 1989-03-15
IT1214219B (it) 1990-01-10
DE3870108D1 (de) 1992-05-21

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