EP0321019A1 - Procédé et dispositif de bobinage du fil sur une bobine qui manque d'une longeur de fil nécessaire à la reconnexion automatique dans un métier à filer à anneau - Google Patents

Procédé et dispositif de bobinage du fil sur une bobine qui manque d'une longeur de fil nécessaire à la reconnexion automatique dans un métier à filer à anneau Download PDF

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Publication number
EP0321019A1
EP0321019A1 EP88202767A EP88202767A EP0321019A1 EP 0321019 A1 EP0321019 A1 EP 0321019A1 EP 88202767 A EP88202767 A EP 88202767A EP 88202767 A EP88202767 A EP 88202767A EP 0321019 A1 EP0321019 A1 EP 0321019A1
Authority
EP
European Patent Office
Prior art keywords
thread
cop
auxiliary
pivot
wound
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Withdrawn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
EP88202767A
Other languages
German (de)
English (en)
Inventor
Sandro Sartoni
Giovanni Verlicchi
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.)
Savio SpA
Savio Macchine Tessili SpA
Original Assignee
Savio SpA
Savio Macchine Tessili 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 Savio SpA, Savio Macchine Tessili SpA filed Critical Savio SpA
Publication of EP0321019A1 publication Critical patent/EP0321019A1/fr
Withdrawn legal-status Critical Current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
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/013—Carriages travelling along the machines

Definitions

  • This invention relates to a procedure as well as to a device for winding thread on a cop that lacks wound thread or carries wound thread of a length insufficient to the operation of automatic reconnection of the thread itself to the small bundle of textile fibers that comes out of the last pair of drawing rollers in a ring spinning ma­chine. It is well known that for various reasons, at the start or during the spinning operation the thread that winds on the spools can break. More particularly, the breaking can occur quite often at the beginning of the spinning process, i.e. after removal of spools and after loading the empty cops around which the thread winds again, after automatic restarting of the spinning procedure.
  • the pneumatic-electronic sensing devices, or the electronic sensing devices, or any other similar sensors have the task of giving the stop signal to the reconnection auto­matic carriage in correspondence to the spinning spindle that is lacking the thread which the process is going to produce, or that is lacking the thread under treatment.
  • the cop on the spindle is not to lack wound thread or to bear wound thread of in­sufficient length, i.e. of too short length.
  • the cop carries some turns of spare thread.
  • the present invention has the task of providing a procedure and a device that are capable of realizing automatically, in a simple and economic way, the accumulation of some reserve thread when the cop mounted on the spindle and subjected to automatic reconnection happens to lack wound thread completely or wound thread of length sufficient to allow the spinning process to restart.
  • the present invention has the object of increasing the extent of automation in ring spinning, a technique that at the present time requires the employment of personnel so that it is onoreous, and in addition the invention has the ob­ject of avoiding simultaneously and safely the poor ac­curacy of manual operations.
  • the device for carrying out in practice the procedure mentioned above comprises the following operative members: - an auxiliary pivot driven for rotation, about which a thread gripping member moves, said gripping members be­ing associated to a thread cutting member, both said mem­bers being driven together by lever means which give rise to a set of motions which are suitable to hold the end of the thread coming from the auxiliary spool and also suitable to locate and arrange diametrically said end of the thread at the top of the auxiliary pivot, blocking said end at the moment when the cop inserts on said auxili­ary pivot; - an auxiliary spool which is full of wound thread and provided laterally with a reciprocating thread guide which is caused to move with a to-and-fro motion in the vertical direction by the rod of a pneumatic actuator or a similar driving member; - a variable profile radical cam for guiding the grip­ping tool or nippers from the position of the spindle of the spinning front to the position of the auxiliary pivot, from this last to the pivot of the suction station, and
  • the auxiliary pivot has a toothed top.
  • said device is assembled in the mov­able carriage of the apparatus for automatic reconnection of the thread with the bundle of the textile fibers com­ing out of the last pair of drawing rollers of a ring spinning machine.
  • the device employed for the practical embodiment of the present invention is associated with some programming means for the coordination of the starting sequence of the various operative members.
  • the device of the present invention When it detects lack of one of threads to form, it stops the carriage at the point of the spindle where the broken thread is present and it also checks, with detecting means again of standard kind the cop for the absence of wound thread or for the presence of wound thread of length insufficient to carry out the automatic reconnection op­eration, which is already technically known, to restart the spinning process. If the absence of thread is detect­ed or if the presence of a limited number of thread turns is detected, the device of the present invention is acti­vated.
  • the gripping member 15 comes out of the carriage-borne casing 26 to go to the spindle 8 carrying the cop 2 on which the absence was detected of a small reserve of wound thread.
  • the whole operation is obtained through the activation of actuator means 14 which, shifting the bell-crank lever 16 through an angle by means of the rod 11 causes the wheel 10 to roll on the front profile of the fixed part 18 of the radial cam, so that as a result the gripping member 15 is guided to said spindle 8.
  • the actuator 27 is activated, and it lowers vertically by means of the rod 28 the grip­ping member 15 to a point at which the same grips the upper end of the cop 2.
  • Said gripping member can be of any shape already known.
  • the actuator 27 is activated again to raise the same cop 2 removing it from its spindle just to the extent that makes it free to go far from the operative front 7 of the ring spinning machine.
  • Such removal is performed by activating the actuator 14 that pushing the rod 11 out causes the bell-crank lever 16 to rotate through an angle along the direction of the arrow 23, so as to arrange the same at 16a.
  • Said gripping member during such shift is again guided by means of the rolling motion of the wheel 10 against the front profile of the fixed part 18 and of the movable part 21 (see Figure 1).
  • the gripping member 15 that grips the cop 2 comes to the position 15a corresponding to the position 16a of the lever means 16 and to the position 10a of the wheel 10 (see Figure 1).
  • the gripping member supports the cop 2 along the vertical line of the auxiliary pivot 6.
  • the feed thread 12 is maintained in position and is put under tension along a precise predetermined path by the guide and trans­mission eyes 30 and 29 as well as by the small tension plates 32, so that it reaches the upper end of the thread guide 9 that sends it between the teeth 1 of the top of the auxiliary pivot 6 by means of the shifts and of the station point of the block joining the thread gripping member 5 and the thread cutting member 4.
  • said block is arranged at a point waiting for a cop that is inserted on the pivot 6 (see Figure 2).
  • Said rota­tion as well as the to-and-fro vertical motions force the thread 12 to unwind from the auxiliary spool 3 to wind on the cop 2 forming a small reserve of wound thread near the basis of the same.
  • a small reserve of wound thread 23 is formed, so that the motion source 35 and the ac­tuator means 31 are disactivated.
  • the actuator 27 is ac­tivated to cause the gripping member 15 to lower so that the same grips the cop 2 at its upper end.
  • the actu­ ator means and the lever means of the block 33 are acti­vated, which means initially open the clamps or any other similar device of the thread gripping member 5 so setting the end of the wound thread free, which means also suc­cessively shift to the part opposite to the auxiliary pivot 6 both the thread gripping member and the thread cutting member.
  • such members are at a point be­tween the cop that already bears the small reserve 34, and the thread guide 9.
  • the members 5 and 4 reach said position, they enclose the length of taut thread between the winding 34 and thread guide 9 (see Figure 4).
  • the clamps of the thread gripping member 5 close and they grip and hold fast the thread located between them.
  • the thread is cut at a point after the clamps by the side of the cop 2, by the action of the thread cutting member that operates with its own cut­ting blades.
  • the other end of the turns making up the small reserve 34 is also free and hence it is no longer joined to the feed thread 12 coming from the auxiliary spool 3; in the meanwhile the end of the feed thread 12 is kept gripped by the clamps of the thread gripping member 5.
  • the actuator 27 is activated, so that it raises the gripping member 15 carrying the cop 2.
  • the activation of the actuator 24 follows immediately, which actuator, shifting through the rod 22 the movable part 21 into the position 21a forces the gripping mem­ber 15 to go into the position 15b corresponding to the position 16b of the lever means 16 and to the position 10b of the wheel 10 (see Figure 7).
  • the gripping member When the gripping member is at the position 15b it supports the cop 2 carry­ ing a reserve of wound thread 34, on the vertical line of the pivot 20 underlying the suction bell 36.
  • the thread gripping member 5 and the thread cutting member 4 are shifted together by means of the levers and of the actuators of the block 33 towards the part opposite to the auxiliary pivot 6 in order to reset the preceding position, so forcing the end of the thread 12 to lie down and to insert itself into the space between the teeth 1 of the top of said auxiliary pivot 6 and in diametrical position (see Fig­ure 5).
  • the feed thread 12, kept taut and gripped between the clamps of the thread tension member 5 is in a pos­ition waiting for another successive cycle of winding of a small reserve of wound thread on another cop which is itself lacking wound thread or which carries wound thread of a length that is not enough for allowing automatic reconnection.
  • the actuator 27 is activated, which causes through the rod 28 the gripping member 15 to lower so forcing the cop to become inserted on the pivot 20 at the position 2a. Then the gripping action is released and the gripping member 15 is raised into a position of operative waiting.
  • a control device is actuated which causes the cop 2 bear­ing the small reserve of wound thread 34 to be vertically raised under the suction bell 36 (see Figure 6). Inciden­tally, it can be observed that the various operative stages mentioned above can be superposed temporally at least partially to one another in order to obtain time optimization of the whole operative cycle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP88202767A 1987-12-18 1988-12-02 Procédé et dispositif de bobinage du fil sur une bobine qui manque d'une longeur de fil nécessaire à la reconnexion automatique dans un métier à filer à anneau Withdrawn EP0321019A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2308287 1987-12-18
IT23082/87A IT1223526B (it) 1987-12-18 1987-12-18 Procedimento e dispositivo per avvolgere filo su un tubetto privo di filo necessario al riattacco automatico in un filatoio ad anelli

Publications (1)

Publication Number Publication Date
EP0321019A1 true EP0321019A1 (fr) 1989-06-21

Family

ID=11203580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202767A Withdrawn EP0321019A1 (fr) 1987-12-18 1988-12-02 Procédé et dispositif de bobinage du fil sur une bobine qui manque d'une longeur de fil nécessaire à la reconnexion automatique dans un métier à filer à anneau

Country Status (2)

Country Link
EP (1) EP0321019A1 (fr)
IT (1) IT1223526B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3527703A1 (fr) * 2018-02-16 2019-08-21 Maschinenfabrik Rieter AG Procédé de fonctionnement d'un poste de filage d'un métier à filer continu à anneaux après un processus de levée

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1582077A (fr) * 1967-05-08 1969-09-26
DE1932014A1 (de) * 1968-06-24 1970-01-02 Parks Cramer Co Verfahren und Vorrichtung zur Verringerung des Zeitaufwandes bei der UEberwachung von Spinnmaschinen mit Hilfe von automatischen Fadenwaechtern und Fadenandrehvorrichtungen
DE2612660A1 (de) * 1975-10-03 1977-04-07 Cognetex Spa Automatische ringlaeufervorrichtung zum auffinden und anlegen von gebrochenen faeden in spinnmaschinen fuer textilfasern von woll- oder baumwollaenge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1582077A (fr) * 1967-05-08 1969-09-26
DE1932014A1 (de) * 1968-06-24 1970-01-02 Parks Cramer Co Verfahren und Vorrichtung zur Verringerung des Zeitaufwandes bei der UEberwachung von Spinnmaschinen mit Hilfe von automatischen Fadenwaechtern und Fadenandrehvorrichtungen
DE2612660A1 (de) * 1975-10-03 1977-04-07 Cognetex Spa Automatische ringlaeufervorrichtung zum auffinden und anlegen von gebrochenen faeden in spinnmaschinen fuer textilfasern von woll- oder baumwollaenge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3527703A1 (fr) * 2018-02-16 2019-08-21 Maschinenfabrik Rieter AG Procédé de fonctionnement d'un poste de filage d'un métier à filer continu à anneaux après un processus de levée
CN110158214A (zh) * 2018-02-16 2019-08-23 里特机械公司 用于在落纱操作后操作环锭纺纱机上的纺纱站的方法
CH714658A1 (de) * 2018-02-16 2019-08-30 Rieter Ag Maschf Verfahren zum Betreiben einer Spinnstelle einer Ringspinnmaschine nach einem Doffvorgang.

Also Published As

Publication number Publication date
IT1223526B (it) 1990-09-19
IT8723082A0 (it) 1987-12-18

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