EP0467862B1 - Méthode et dispositif pour l'enlèvement de bobines d'un métier à filer et pour la casse du fil - Google Patents

Méthode et dispositif pour l'enlèvement de bobines d'un métier à filer et pour la casse du fil Download PDF

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Publication number
EP0467862B1
EP0467862B1 EP91830308A EP91830308A EP0467862B1 EP 0467862 B1 EP0467862 B1 EP 0467862B1 EP 91830308 A EP91830308 A EP 91830308A EP 91830308 A EP91830308 A EP 91830308A EP 0467862 B1 EP0467862 B1 EP 0467862B1
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EP
European Patent Office
Prior art keywords
tube
spindle
jaws
gripping device
bobbin
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
EP91830308A
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German (de)
English (en)
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EP0467862A1 (fr
Inventor
Piero Bigagli
Solitario Nesti
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S BIGAGLI AND C SpA
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S BIGAGLI AND C SpA
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Publication of EP0467862A1 publication Critical patent/EP0467862A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
    • D01H9/16—Yarn-severing arrangements, e.g. for cutting transfer tails; Separating of roving in flyer
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
    • D01H9/04—Doffing arrangements integral with spinning or twisting machines

Definitions

  • the present invention refers to a method for removing bobbins from a spinning machine and breaking the yarn.
  • the invention refers also to a device for doffing bobbins from a spinning machine.
  • the slubbing coming from a feed pirn or bobbin is unwound and fed to the working units where it is drawn and twisted, and then rewound onto a tube or some similar item for holding yarn.
  • the bobbin is formed around a tube which is generally conical in shape and is fitted over and grip a rotating drive spindle.
  • a bobbin is full, in other words when a sufficient quantity of yarn has been wound around it, the bobbin must be removed and replaced with an empty tube, in order to form a new bobbin. This can be carried out manually or by automatic systems that doff full bobbins and replace them with empty tubes.
  • the underwinding yarn is the yarn that, once winding is completed, is taken from the bobbin to the underwinding area on the spindle. The underwinding operation allows the bobbin to be removed from the spindle whilst keeping the yarn in position between the drawing assembly and the spindle.
  • the yarn Before doffing the bobbin the yarn is wound around the spindle a few times in the underwinding area. When the bobbin is subsequently removed from the spindle and the yarn breaks, the end of the yarn stays wound around the spindle so that winding can then start on a fresh tube. When winding begins on the new tube, the yarn attached to the underwinding area is taken to the new tube so that winding of a new bobbin can begin.
  • the object of the present invention is thus a method of doffing bobbins that overcomes the above mentioned drawbacks, and allows bobbins to be doffed and their underwinding and binding yarns to be broken even when the yarn being spun is very elastic and/or has a high breaking strength.
  • the method according to the invention is characterized in that: the tube on which the bobbin is formed is gripped by a gripping device near the bottom edge of the tube, thus pinching the underwinding and binding yarns against the tube; and that the bobbin is doffed causing the underwinding and binding yarns to break between the spindle underwinding area and the tube pinch point.
  • the gripping device grips the two underwinding and binding yarns at a point very close to the underwinding area on the spindle. Therefore, the length of the underwinding and binding yarns being pulled (and stretched) to cause breaking thereof is extremely limited. Consequently, the total stretching distance before the yarns break is kept within the limits compatible with the movements of the devices for doffing the bobbins and loading the tubes. Moreover, by breaking the yarns in this way, the yarns do not unwind from the full bobbins being removed.
  • a second object of the invention is a device for doffing bobbins from a spinning machine, for performing the above described method.
  • JP-A-58 078 965 describes a device for the automatic removal of a yarn bobbin (S) wound on a tube (T) from a spin dle (1), said device including: a gripping device with a pair of jaws pivotally supported on a plate; and first actuating means which move said gripping device from an inactive position into an active position wherein said gripping device grips the tube close to the lower rim thereof.
  • This know device does not provide for braking of the underwinding and binding yarns.
  • EP-A-0 201 942 discloses a device for automatic doffing yarn bobbins on ring spinning machines and for replacing them with empty tubes.
  • This known device has an annular gripper with an inner membrane capable of being pneumatically expanded.
  • the annular gripper is axially moved and placed around the bobbin.
  • the membrane is expanded in order to radially grip the bobbin in an intermediate portion thereof far away from the bottom rim of the tube.
  • a relatively long vertical stroke is then performed by the gripper to withdraw the bobbin from the spindle.
  • the same arm carrying the gripper also carries an empty-tube engaging means which, after a 180°-rotation of the arm, inserts the new tube onto the spindle. No specific provision is met to breake the underwinding and binding yarns.
  • the gripping device is designed to have alternately an inactive position, where the gripping device is clear of its respective spindle, and an active position, where the gripping device grips the tube on the spindle.
  • the gripping device is capable of moving towards the spindle, so that, when the gripping device touches the tube, the active surfaces of the gripping device close around the tube on the spindle.
  • This approaching movement can be a translation movement, or, in a particularly advantageous embodiment, the gripping device can be mounted in an oscillating fashion and an actuator controls the oscillation of the gripping device from its clear position to its operating position where it grips the tube.
  • the jaws of the gripping device are directly closed by the approach of the jaws to the tube.
  • the possibility of using some form of drive system for closing these jaws is not excluded.
  • tube fitting systems are used that comprise a spring loaded device that "shoots" a tube onto the spindle. When the device is tripped, a tube is violently pushed against the spindle in a co-axial direction so that it is fitted onto the spindle.
  • a device of this type is described, for example, in EP-A-O 299 934. As tubes can be deformed or of not precisely the same shape, these tube fitting systems cannot fit all tubes onto the spindles of a machine in precisely the same position.
  • the same means that grips and removes the bobbins is used to grip a tube that has been placed onto the spindle without the use of force and pull it downward until the tube is locked on the spindle by interference. In this way, the empty tube is safely and reliably fitted onto the spindle.
  • the two jaws that form the gripping device can have an internal projecting ridge that divides the active surface of the jaws into an upper and a lower part, which are designed to cooperate respectively with the lower edge of the tube for extracting the bobbin and with an intermediate portion of the tube for forcing the empty tube onto the spindle, after it has been inserted thereon without interference.
  • one, or both of the upper and lower parts of the jaws can be conically shaped with a suitable aperture so as to cooperate with the tube.
  • Figs. 1 and 2 schematically show the lower part of a spindle (1) mounted on a spindle line (3).
  • the spindle shown is typical of those found on self-acting, or intermittent type spinning machines. In any case, as will become clear from that which follows, the same device can be fitted to any textile machine that winds yarn around a tube.
  • a tube (T) that is fitted and forced over the spindle and is rotated by the spindle.
  • a yarn bobbin (S) is formed around the tube.
  • a spool-remover (indicated in its entirety by 9) comprising a plate (10) on which a pair of pliers (11) described in greater detail later on is mounted.
  • the spool-remover is mounted on a rocker-arm (13) that is jointed at one end to a cylinder-piston actuator (15), and at the other end to a support (17, 19).
  • the assembly formed by the spool-remover (9), rocker-arm (13), actuator (15), and support (17, 19) is mounted on a bar (20), hereinafter called the spool-remover bar.
  • Figs. 1 and 2 show the limit positions of the rocker-arm (13), and thus the spool-remover (9), as driven by the actuator (15).
  • the rocker-arm (13) is in its lower position and the spool-remover (9) is in its inactive position with the plier (11) clear of the spindle (1).
  • the rocker-arm (13) has been driven to its upper position so that the spool-remover (9) is placed in its active position, i.e. with the pliers (11) engaging the tube (T).
  • the pliers (11) are composed of a pair of jaws (25) attached via a hinge (27) to the plate (10), and held in an open position by a spring (29) whose ends are attached to two pins (31) housed in two cavities (33) in the jaws (25).
  • a spring (29) whose ends are attached to two pins (31) housed in two cavities (33) in the jaws (25).
  • the jaws (25) of the pliers (11) are in the open position shown in Fig. 4.
  • the spool-remover (9) is moved by the oscillation of the rocker-arm (13) towards its active position as shown in Fig. 2, the jaws (25) approach the tube (T) until they close around it in the position shown in Fig. 3.
  • the jaws (25) are closed by the action of the jaws themselves being pressed against the external surface of the tube (T).
  • the jaws (25) grip the tube (T), on which the bobbin (S) is formed, around the flared lower rim (TB) of the tube.
  • the underwinding yarn (FS) and the binding yarn (FL) that are positioned between the bobbin (S) and the underwinding area on the spindle (1) are pinched between the lower rim (TB) of the tube (T) and the internal surface of the jaws (25).
  • the jaws (25) have a conical tube gripping surface (35) that ends in a ring-shaped raised ridge (37).
  • the spool-remover (9) When the bobbin (S) is to be doffed, the spool-remover (9) is moved into the position shown in Fig. 2, and the jaws (25) of the plier (11) grip the lower rim (TB) of the tube (T) thereby pinching the underwinding (FS) and binding yarns (FL). At this point, the spool-remover support (19) and the bar (20) are raised in the direction shown by the arrow (f19), remove the tube from the spindle (1), and release the bobbin (S) to means for holding or collecting it, that are not shown as they are of a known type.
  • a rack and pinion system (39, 41) can be used to raise the spool-remover bar, or a system that uses an actuator with a hydraulic piston or other suitable means, possibly similar to those used on traditional spool-removers.
  • An actuator with a hydraulic piston or other suitable means, possibly similar to those used on traditional spool-removers.
  • One example of a system for collecting full bobbins is described in the previously mentioned EP-A-O 299 934.
  • the yarns (FS and FL) are also broken during this operation. As they are pinched around the lower rim of the tube and therefore close to the underwinding area of the spindle (1), the breakage takes place within an extremely limited free length of yarn. This means that the total stretching distance before the yarns break is far less than that of normal bobbin doffing devices, where the underwinding and binding yarns are free from the underwinding area to the point where they are attached to the bobbin.
  • the pinching action of the pliers (11) also prevents any of the coils wound around the bobbin from unwinding. The subsequent release of bobbins to means for collecting it occurs in the traditional manner.
  • Figs. 3, 4, 5, 5A, and 5B show the operation of the pliers whilst removing the tube in detail.
  • the tube is fitted over the spindle (1) with interference, thus a degree of force (V) must be applied in order to remove it from the spindle.
  • V degree of force
  • the pliers touch the rim (TB) of the tube (T) with a certain degree of play so that the pliers can be positioned without an excessive amount of force being used.
  • the position of the pliers in respect of the tube before removal begins is shown in Fig. 5A, i.e. before the closed pliers begin moving upwards: the tube (T) is in contact with the jaws (25) and rests laterally thereon.
  • the contact reaction forces between the tube and the jaws (25) are shown at (F1) and (F2). These reaction forces are balanced by the reactions (R) and (H) of the hinges attaching the jaws (25) to the plate (10).
  • the spool removal bar (20) is in its closed position, the axes about which the jaws (25) on each pair of pliers rotate (in other words the axes of the hinges (27)) are aligned with the axis of the respective spindle (1).
  • the spool-remover begins moving upward in the direction shown by the arrow (f19), the play between the tube and the jaws (25) is recovered, and the tube is completely gripped between the two jaws (25), as shown in Fig. 5B.
  • the above described pliers (11) are also designed to be capable of fitting an empty tube over the spindle (1). To this end, there is a ring-shaped projecting ridge (37) and a second conical surface (43) below it. Tubes are fitted in the following way (see Fig. 7): The tube is loosely placed over the spindle (1) either by hand or using an automatic system of a known type. The pliers (11) of the spool-remover (9) are in their inactive position and the spool-remover support (19) is raised. The tube (T) is fully fitted by the pliers (11) moving from their inactive position, as shown in Fig. 7 by a solid line, to their active position, as shown in Fig.
  • the degree of opening can be controlled by the force exerted by the actuator (15), and can occur when a certain value of force (V) is reached, i.e. a certain degree of the force with which the tube is fitted over the spindle.
  • Fig. 8 shows a modified form of construction of the pliers on the spool-remover (109).
  • the pliers (111) have two jaws (125) pivoted on pins (127) inserted in respective slots (127A). The jaws are held in an open position by a spring (129).
  • a small crank (132) is fixed to the oval shaped piece (128) and rotates about the same pivot (130), and is also attached at (134) to a control rod (136).
  • the two jaws of the pliers (111) are only used to grip the tube, and the necessary upward force is provided by the edge (110) of the support bar striking against the lower rim of the tube.
  • the support bar holding the pliers (111) is lowered so that the jaws (125) of the various pliers (111) are held in an open position around their respective spindles.
  • the tubes are then loosely fitted over the spindles and the control rod (136) then causes the jaws (125) to close around the tubes, and the bar is lowered parallel to the spindle axes thus fitting the tubes over the spindles.
  • Figs. 9 and 10 show a modified gripping device that can be used as an alternative to the previously described pliers.
  • This gripping device is constructed with a pair of rollers (201) mounted on a bar (203), corresponding to bar (20).
  • the rollers (201) are basically cylindrical, but each has a toroid shaped section (205) designed to be capable of gripping a tube (T).
  • These rollers (201) are mounted in an oscillating fashion on two axes (A-A) that are eccentric in respect of the axes of the rollers, and are connected to a spring (207).
  • the oscillation of the rollers allows a space to be created between them into which a tube can be housed.
  • the bar (203) can oscillate in the same way as the bar (20) in the previously described example.
  • the bar (203) lowers and the tube (T) is gripped and fitted over the spindle.
  • the friction action of the tube on the eccentric rollers (201) causes them to rotate on their respective rotation axes (A-A), thus causing them to grip the tube.
  • the bar (203) is placed beneath the base of the tube and forms a rest for removing the tube and pinching the yarns to be broken.
  • the rotation of the eccentric rollers is limited by slots on the bar (203). The space between the rollers is less than the diameter of the tube to be removed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)

Claims (10)

  1. Procédé pour l'enlèvement automatique d'une bobine (S) d'une broche (1) et pour la casse des fils de bobinage inférieur et de liaison (FS,FL), dans lequel le tube (T) sur lequel est enroulée la bobine (S) est enlevé par saisie à l'aide d'un dispositif de préhension (11,111,201) proche de son bord inférieur (TB) de façon à effectuer le pincement des fils de bobinage inférieur de liaison (FS,FL) sur le tube (T); et en ce que lorsque la bobine (S) est enlevée, s'effectue le cassage des fils de bobinage inférieur et de liaison (FS,FL) entre la zone de bobinage inférieur sur la broche (1) et le point où sont passés les fils sur le tube (T).
  2. Procédé selon la revendication 1, dans lequel le même dispositif de préhension (11,111,201) est utilisé pour saisir un nouveau tube à monter sur la broche dans une position intermédiaire le long du tube, le blocage par interférence du tube sur la broche étant obtenu par poussée du tube sur la broche à l'aide du dispositif de préhension.
  3. Dispositif pour réaliser le procédé de la revendication 1, pour l'enlèvement automatique d'une bobine de fil (S) enroulée sur le tube (T) à partir d'une broche (1) et pour le cassage des fils de bobinage inférieur et de liaison (FS,FL), ce dispositif comportant des moyens d'enlèvement (9,901) comprenant: un dispositif de préhension (11,111,201) avec une paire de mâchoires raccordées réciproquement (25,125,201) montées de façon pivotante sur une plaque (10,110) et un organe d'actionnement (15) qui déplace le dispositif de préhension depuis une position inactive sur une position active dans laquelle le dispositif de préhension saisit le tube (T) à proximité de son bord inférieur (TB), caractérisé par des moyens d'actionnement (39,41) qui sont agencés de telle sorte que lorsque le dispositif de préhension se trouve dans des positions actives et saisit le tube (T), ce dispositif de préhension passe le fil de bobinage inférieur et de liaison (FS,FL) contre le tube, ces moyens d'actionnement (39,41) déplaçant le dispositif de préhension (11,111,201) dans une direction approximativement parallèle à l'axe de la broche de façon à enlever le tube (7) et la bobine concernée (S) de la broche (1) et cassant ainsi les fils de bobinage inférieur et de liaison (FS,FL).
  4. Dispositif selon la revendication 3, caractérisé par un support (19) sur lequel est fixé un dispositif de préhension (11,111,201) d'une manière aussi lente, le premier organe d'actionnement (15) commandant le mouvement oscillant du dispositif de préhension (11,111,201) entre ses positions inactive et active et les moyens d'actionnement (39,41) déplaçant le support (19) dans une direction approximativement parallèle à l'axe de la broche.
  5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que les mâchoires (25) ont une surface interne conique (35) conçue pour saisir le bord inférieur (TB) du tube (T), l'extrémité la plus large de la surface conique étant dirigée vers le sommet de la broche (1).
  6. Dispositif selon les revendications 3, 4 ou 5, caractérisé en ce que les broches (25,125) ont une surface interne conique (43) conçue pour saisir une partie intermédiaire du tube (T) pour la fixer sur la broche (1); l'extrémité la plus large de cette surface conique étant dirigée vers la base de la broche (1).
  7. Dispositif selon l'une ou plusieurs des revendications 3 à 6, caractérisé en ce que les broches (25,125) ont un bord en saillie interne (37) qui divise les mâchoires en une zone (35) pour la saisie du bord inférieur du tube (T) et une zone (43) pour la saisie d'une partie intermédiaire du tube (T).
  8. Dispositif selon l'une ou plusieurs des revendications 3 à 7, caractérisé en ce que la paire de mâchoires (25) est maintenue dans une position ouverte par un moyen élastique (29); les mâchoires (25) étant fermées directement par la broche des mâchoires sur le tube (T).
  9. Dispositif selon l'une ou plusieurs des revendications 3 à 7, caractérisé en ce que le dispositif de préhension (111) comprend des moyens de conduite (128,132, 136) qui ferment les mâchoires (125).
  10. Dispositif selon la revendication 3 ou 4, caractérisé en ce que les mâchoires (201) sont sous forme d'une paire de rouleaux (201) qui sont montés de façon excentrique sur une barre (203) et possèdent des surfaces (205) conçues pour saisir le tube.
EP91830308A 1990-07-13 1991-07-11 Méthode et dispositif pour l'enlèvement de bobines d'un métier à filer et pour la casse du fil Expired - Lifetime EP0467862B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT9447A IT1241755B (it) 1990-07-13 1990-07-13 Metodo e dispositivo per la levata delle spole e per lo strappo del filo in un filatoio
IT944790 1990-07-13

Publications (2)

Publication Number Publication Date
EP0467862A1 EP0467862A1 (fr) 1992-01-22
EP0467862B1 true EP0467862B1 (fr) 1996-10-30

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Application Number Title Priority Date Filing Date
EP91830308A Expired - Lifetime EP0467862B1 (fr) 1990-07-13 1991-07-11 Méthode et dispositif pour l'enlèvement de bobines d'un métier à filer et pour la casse du fil

Country Status (4)

Country Link
EP (1) EP0467862B1 (fr)
DE (1) DE69122917T2 (fr)
ES (1) ES2094215T3 (fr)
IT (1) IT1241755B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686906B1 (fr) * 1992-02-03 1995-04-07 Schlumberger Cie N Procede et dispositif d'elimination du fil de sous-renvidage des broches sur un metier continu a filer ou a retordre.
CN114934329B (zh) * 2022-06-21 2023-09-05 张家港扬子纺纱有限公司 一种倍捻机机械手掌、控制方法及计算机存储介质

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1187551B (it) * 1985-03-26 1987-12-23 Cerimates Spa Dispositivo di levata spole per filatoi ad anelli
JP2736257B2 (ja) * 1987-07-17 1998-04-02 エツセ．ビガグリ・エ・チ．ソチエタ・ペル・アツイオーニ 自動ミユール等の間欠紡糸機械におけるコツプ玉揚げおよびボビン交換用プラント

Also Published As

Publication number Publication date
IT1241755B (it) 1994-02-01
ES2094215T3 (es) 1997-01-16
IT9009447A0 (it) 1990-07-13
DE69122917T2 (de) 1997-04-03
EP0467862A1 (fr) 1992-01-22
IT9009447A1 (it) 1992-01-13
DE69122917D1 (de) 1996-12-05

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