EP1477594A1 - Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux - Google Patents

Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux Download PDF

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Publication number
EP1477594A1
EP1477594A1 EP03425305A EP03425305A EP1477594A1 EP 1477594 A1 EP1477594 A1 EP 1477594A1 EP 03425305 A EP03425305 A EP 03425305A EP 03425305 A EP03425305 A EP 03425305A EP 1477594 A1 EP1477594 A1 EP 1477594A1
Authority
EP
European Patent Office
Prior art keywords
bar
gripping device
sleeve
spindle
spinning frame
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.)
Granted
Application number
EP03425305A
Other languages
German (de)
English (en)
Other versions
EP1477594B1 (fr
Inventor
Claudio Locatelli
Giovanni Baitelli
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.)
Marzoli SpA
Original Assignee
Marzoli SpA
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 Marzoli SpA filed Critical Marzoli SpA
Priority to DE60322189T priority Critical patent/DE60322189D1/de
Priority to DE60325284T priority patent/DE60325284D1/de
Priority to EP06114231A priority patent/EP1696058B1/fr
Priority to AT03425305T priority patent/ATE401439T1/de
Priority to EP03425305A priority patent/EP1477594B1/fr
Publication of EP1477594A1 publication Critical patent/EP1477594A1/fr
Application granted granted Critical
Publication of EP1477594B1 publication Critical patent/EP1477594B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/38—Arrangements for winding reserve lengths of yarn on take-up packages or spindles, e.g. transfer tails

Definitions

  • the present invention relates to a device for gripping the underwinding yarn for a ring spinning frame.
  • the spinning frame is stopped.
  • the bobbins are connected to the yarn arriving from the spinning frame's draft unit and passing through the traveller of the ring rail.
  • the bobbins are removed from the spindles by machines specially designed for the operation and known as doffers.
  • the bobbin is separated from the yarn by tearing the yarn. Once an empty tube has been put on, the spinning frame is started up again to form a new bobbin.
  • gripping devices In order to carry out this process automatically, gripping devices have been designed to grip a reserve length of yarn, so that when the rotation of the spindles and the movement of the rail are started up again, the yarn winds onto the empty tube and forms a new bobbin.
  • the problem addressed by the present invention is that of devising a gripping device that will have structural and functional features such as to fulfil the abovementioned requirements and at the same time obviate the problems outlined above.
  • Figure 1 is a longitudinal schematic view of a series of spindles of a spinning frame comprising a gripping device according to the present invention
  • Figure 2 is a partially sectioned view of a spindle from Figure 1, taken on section plane A-A, in which the gripping device is in a closed configuration;
  • Figure 3 is a partially sectioned view of a spindle from Figure 1, taken on section plane B-B, in which the gripping device is in a closed configuration;
  • Figure 4 is a partially sectioned view of a spindle from Figure 1, taken on section plane A-A, in which the gripping device is in an open configuration;
  • Figure 5 is a partially sectioned view of a spindle from Figure 1, taken on section plane B-B, in which the gripping device is in an open configuration;
  • Figures 6a and 6b show a bar belonging to the gripping device of Figure 1, in plan view and side view respectively;
  • Figure 7 is an enlarged detail of the bar from Figure 6a.
  • Figures 8a to 8c show cross sections of the bar from Figure 7, taken on section planes C-C, D-D and F-F, respectively, from Figure 7.
  • the number 1 is a general reference for a spinning frame for forming bobbins which will then be sent on for subsequent processing.
  • the spinning frame 1 comprises a plurality of spindles 2 arranged along a longitudinal axis X-X of the spinning frame.
  • Each spindle 2 extends along a vertical axis of rotation Y-Y, about which the spindle is rotated in order to wind up the yarn onto the tube placed on the said spindle.
  • the spindle 2 has a connecting portion 4 attached by connecting means 6, such as a captive nut system, to the structure 8 of the spinning frame.
  • the said spindle 2 has a portion, known as a wharf 10, acted upon by drive means 12 capable of rotating the spindle 2 about the vertical axis Y-Y.
  • the spindle 2 has a collar 14 fixed to the said spindle.
  • the collar 14 is coaxial with the spindle and comprises a bush 16 from where there projects, at the top end 16a of the bush, an annular projection 18.
  • the said annular projection 18 is provided, in a preferred embodiment, with a shaped portion 20.
  • the said shaped portion 20 On a horizontal plane passing through the said annular projection 18 and perpendicular to the vertical axis Y-Y of the spindle, the said shaped portion 20 exhibits a toothed, preferably triangular profile.
  • the spindle 2 also includes a sleeve 24 which is coupled in rotation to the said spindle and able to slide along the said vertical axis of rotation Y-Y.
  • the sleeve 24 has, at a lower end 24a, a ring 26 projecting radially from the tubular element of the said sleeve.
  • the said sleeve is provided, at its top end 24b, with an opposing shaped portion 28.
  • the said opposing shaped portion 28 On a cylindrical surface, coaxial with the spindle 2 and passing through the said opposing shaped portion 28, the said opposing shaped portion 28 has a toothed, preferably triangular profile.
  • the sleeve 24 is permanently urged towards and against the said collar 14.
  • top end 24b of the said sleeve 24 is permanently urged towards and against the collar 14.
  • a stop ring 30 is connected to the bush 16 of the fixed collar 14 and supports a cylindrical distance piece 32.
  • a spring 34 is compressed between the said distance piece 32 and an internal annular projection 36 of the sleeve 24, formed at the top end 24b of the latter.
  • the said spring 34 permanently urges the sleeve 24 so that it is held against the collar 14.
  • the sleeve 24 of the spindle 2 engages with a bar 40 that extends along the said longitudinal axis X-X of the spinning frame 1.
  • the said bar 40 has at least one active portion 42 that engages with the said sleeve 24 of the spindle 2.
  • the said bar 40 has a cross section, formed by a plane perpendicular to the longitudinal axis X-X of the spinning frame, that is closed.
  • the said bar 40 comprises a C-shaped portion 43a and a strip 43b, connected to the open side of the C-shaped portion 43a, to form the said closed section.
  • a longitudinal centre plane M-M is defined at right angles to the visible surface of the said bar, for example at right angles to the visible surface of the C-shaped portion 43a.
  • the said bar 40 has, along the longitudinal axis X-X, at least one opening 60 passing through the said C-shaped portion 43a and the said strip 43b, the said opening being designed to fit the said bar to each spindle 2 of the spinning frame 1.
  • the opening 60 is designed to engage the bar 40 with the sleeve 24.
  • the said opening 60 produced by a visible hole 62a through the C-shaped portion 43a of the bar 40 and a corresponding lower hole 62b through the strip 43b, has a diameter of the visible hole 62a that is smaller than the outside diameter of the ring 26 of the sleeve 24.
  • the active portion 42 of the bar 40 comes into contact with the ring 26 of the sleeve 24, bringing about a downward translational movement of the said sleeve.
  • the said active portion 42 of the bar 40 is defined by the zone of contact between the sleeve 24 and the said bar 40 which causes the sleeve to move downwards.
  • the bar 40 also has at least one engagement portion 64, designed to engage with drive means 100 for moving the said bar in the direction of the vertical axis Y-Y.
  • the said engagement portion 64 is designed to transmit to the bar 40 the translational movement in the direction of the vertical axis Y-Y produced by the said drive means 100.
  • At least one of the said engagement portions 64 of the bar engaging with the said drive means 100 for its translational movement is separated longitudinally from at least one of the said active portions 42 of the bar 40 that engages with the said sleeve 24.
  • the said engagement portions 64 represent bearing points for the said bar, so that the bar 40 is supported at a plurality of bearing points arranged along a support axis Z-Z.
  • the bar 40 is supported at a first bearing point 70a and at a second bearing point 70b, separated along the said support axis Z-Z passing through the two said bearing points, by a length termed the span.
  • the said span is preferably 1680 mm long, or, in another embodiment, 1800 mm long.
  • the said bearing points 70a, 70b represent the points at which the said bar is connected to the said drive means 100 for moving the said bar along the direction of the vertical axis Y-Y.
  • the support axis Z-Z of the bar 40 intercepts at least one of the said active portions 42 of the bar 40.
  • the bearing points of the bar for example the points at which it is connected to the drive means 100, define the support axis Z-Z which passes through at least one of the zones designed for contact between the sleeve 24 and the bar 40.
  • the said drive means comprise a pneumatic or hydraulic actuator assembly comprising a cylinder-and-piston device.
  • the said drive means 100 comprise a cylinder 102 acting in combination with a piston 104, connected to the bar 40 by means of a distance piece 106.
  • Connection means preferably comprising a yarned connection, are suitable for connecting the piston 104 to the distance piece 106, the distance piece 106 to the bar 40 and the cylinder 102 to the structure of the spinning frame.
  • the piston 104 of the drive means 100 is positioned so that its axis of translational movement T-T is essentially parallel to the vertical axis Y-Y of the spindle 2, so that the said translational movement of the bar 40 occurs in a direction parallel to the said vertical axis Y-Y.
  • the said axis of translational movement T-T of the piston 104 lies in the centre plane M-M defined for the bar 40.
  • At least one of the said spindles 2 is positioned at a longitudinal distance from the said drive means 100 for the translational movement of the bar.
  • At least one of the said spindles 2 is positioned at a longitudinal distance from the axis of translational movement T-T of the piston 104.
  • the said drive means 100 for the translational movement of the bar 40 which comprise for example the said cylinder-and-piston device, are at a longitudinal distance from the wharf of the spindle in which the said spindle engages with the drive means for turning the spindle.
  • the said spinning frame 1 also includes a ring rail 200 connected to drive means (not shown) that give the said rail a reciprocating vertical translational motion.
  • a ring 202 that surrounds the spindle 2 and around which a traveller (not shown) rotates.
  • An empty tube is placed on the spindle for a new bobbin to be formed.
  • the tube is attached to the body of the spindle by retention means, preferably snap-lock means.
  • the spindle is rotated by the drive means 12 which are designed to rotate the spindle about the vertical axis of rotation Y-Y.
  • the rail 200 is moved vertically by the rail movement drive means, giving them a reciprocating vertical motion proceeding gradually from the base portion of the spindle near the collar 14, towards the top end thereof.
  • the yarn, gripped by the gripping device and guided by the rail traveller, is wound onto the tube and forms a first bobbin.
  • the rail 200 which, following its reciprocating translational motion, has reached an upper reversing position close to the top end of the spindle, reverses its direction of motion and proceeds from the said upper reversing position to a lower or end-of-winding position close to the collar 14 and above the said collar.
  • the bobbin When it reaches the lower or end-of-winding position, the bobbin is wound and ready to be doffed.
  • the drive means 100 for the translational movement of the bar 40 are actuated: the piston 104 moves along the axis of translational movement T-T from the up position to a down position, carrying the bar downwards ( Figures 4 and 5).
  • the active portion 42 of the bar 40 engages with the sleeve 24, in particular with the ring 26 of the said sleeve, moving it to a down position and defining an open configuration for the said gripping device.
  • the drive means 12 for turning the spindle 2 turn it a low speed.
  • the rail 200 moves beneath the lower or end-of-winding position, that is beneath the axial position of the collar 14.
  • the yarn, guided by the traveller, is placed between the opposing shaped portion 28 of the sleeve 24 and the collar 14, preferably around the bush 16 of the said collar.
  • the spindle 2 is turned at low speed through an angle of rotation of less than 360°, preferably less than 270°.
  • the drive means 100 for the translational movement of the bar 40 are actuated and the piston 104 moves from the down position to the up position.
  • the rotation of the spindles is stopped and the formed bobbin is doffed.
  • the formed bobbin has a start, formed by a gripped length of yarn, which forms the reserve of the formed bobbin, and an end, formed by a gripped length of yarn arriving from the spinning frame's draft device, which forms the reserve for a bobbin that has yet to be formed.
  • Removing the formed bobbin while the sleeve is closed tears the reserve yarn of the formed bobbin downstream of the point where it is gripped, and, at the same time, tears the reserve yarn of the bobbin to be formed next, upstream of the point where it is gripped.
  • the gripping device grips a finite length of yarn which represents the reserve of the doffed bobbin, and a length of yarn arising from the spinning frame's draft device which forms the reserve of the bobbin to be formed next.
  • the gripping device is preferably opened, by operating the drive means 100 to move the bar 40, in the course of bobbin winding, for example when the rail 200 is near the top end of the spindle or in the top position.
  • the opening of the gripping device to expel the reserve belonging to the doffed bobbin is not directly and unambiguously dependent on the speed of rotation of the spindle or on the position of the rail, because the opening of the gripping device to expel the reserve belonging to the doffed bobbin is effected by controlling the drive means 100 for moving the bar.
  • the reserve belonging to the doffed bobbin is expelled by the action of centrifugal force.
  • the gripping device according to the invention is found to be efficient in simultaneously opening and/or closing the gripping devices connected to the spindles even though it does not have drive means specifically dedicated to each spindle.
  • the spinning frame is simpler to construct and less costly, and requires less maintenance.
  • the bar has bearing points arranged along a support axis that passes through the active portions, thus stiffening the said bar so that it is able to lower the sleeves connected to the various spindles more or less simultaneously.
  • the engagement portions of the bar that engage with the drive means used for its translational movement are separated longitudinally on the active portions that engage with the sleeves, making the spinning frame compact in its structure and avoiding the structural complexities that would be due to the sharing of the spaces available between the drive means for moving the bar, and the drive means for rotating the spindles.
  • Another advantageous aspect is that the release of the reserve belonging to the doffed bobbin occurs when the rail is raised, limiting the risk of the said reserve spoiling the newly forming yarn.
  • the bar has more than two bearing points.
  • the drive means for the translational movement of the bar comprise electric motors.
  • the bar has a two-way connection to the sleeve so that the sleeve is returned to the closed configuration of the gripping device by the actuation of the said drive means for translational movement of the bar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP03425305A 2003-05-13 2003-05-13 Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux Expired - Lifetime EP1477594B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE60322189T DE60322189D1 (de) 2003-05-13 2003-05-13 Vorrichtung zum Greifen von einem unterwundenen Faden in einer Ringspinnmaschine
DE60325284T DE60325284D1 (de) 2003-05-13 2003-05-13 Vorrichtung zum Greifen von einem unterwundenen Faden in einer Ringspinnmaschine
EP06114231A EP1696058B1 (fr) 2003-05-13 2003-05-13 Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux
AT03425305T ATE401439T1 (de) 2003-05-13 2003-05-13 Vorrichtung zum greifen von einem unterwundenen faden in einer ringspinnmaschine
EP03425305A EP1477594B1 (fr) 2003-05-13 2003-05-13 Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03425305A EP1477594B1 (fr) 2003-05-13 2003-05-13 Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP06114231A Division EP1696058B1 (fr) 2003-05-13 2003-05-13 Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux

Publications (2)

Publication Number Publication Date
EP1477594A1 true EP1477594A1 (fr) 2004-11-17
EP1477594B1 EP1477594B1 (fr) 2008-07-16

Family

ID=33017046

Family Applications (2)

Application Number Title Priority Date Filing Date
EP03425305A Expired - Lifetime EP1477594B1 (fr) 2003-05-13 2003-05-13 Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux
EP06114231A Expired - Lifetime EP1696058B1 (fr) 2003-05-13 2003-05-13 Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP06114231A Expired - Lifetime EP1696058B1 (fr) 2003-05-13 2003-05-13 Dispositif pour saisir un fil sous-renvidé dans un métier à filer à anneaux

Country Status (3)

Country Link
EP (2) EP1477594B1 (fr)
AT (1) ATE401439T1 (fr)
DE (2) DE60325284D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104018259B (zh) * 2014-05-21 2016-03-09 绍兴市今朝自动化设备科技有限公司 一种落纱机的夹纱同步机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH290235A (de) * 1950-04-26 1953-04-30 Tmm Research Ltd Ringspinnmaschine.
EP0775769A1 (fr) * 1995-11-23 1997-05-28 Zinser Textilmaschinen GmbH Dispositif pour pincer le fil de sous-renvidage à une broche d'un métier à filer ou à retordre
DE19816205A1 (de) * 1998-04-09 1999-10-14 Zinser Textilmaschinen Gmbh Vorrichtung zum Klemmen eines Unterwindefadens an der Spindel einer Ringspinn- und/oder -zwirnmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH290235A (de) * 1950-04-26 1953-04-30 Tmm Research Ltd Ringspinnmaschine.
EP0775769A1 (fr) * 1995-11-23 1997-05-28 Zinser Textilmaschinen GmbH Dispositif pour pincer le fil de sous-renvidage à une broche d'un métier à filer ou à retordre
DE19816205A1 (de) * 1998-04-09 1999-10-14 Zinser Textilmaschinen Gmbh Vorrichtung zum Klemmen eines Unterwindefadens an der Spindel einer Ringspinn- und/oder -zwirnmaschine

Also Published As

Publication number Publication date
EP1696058A2 (fr) 2006-08-30
ATE401439T1 (de) 2008-08-15
DE60325284D1 (de) 2009-01-22
EP1696058A3 (fr) 2007-06-27
EP1477594B1 (fr) 2008-07-16
EP1696058B1 (fr) 2008-12-10
DE60322189D1 (de) 2008-08-28

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