EP0306428B1 - Winding mandrel to limit frictional torque - Google Patents

Winding mandrel to limit frictional torque Download PDF

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Publication number
EP0306428B1
EP0306428B1 EP88450030A EP88450030A EP0306428B1 EP 0306428 B1 EP0306428 B1 EP 0306428B1 EP 88450030 A EP88450030 A EP 88450030A EP 88450030 A EP88450030 A EP 88450030A EP 0306428 B1 EP0306428 B1 EP 0306428B1
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EP
European Patent Office
Prior art keywords
segments
sleeves
shaft
mandrel
parts
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
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EP88450030A
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German (de)
French (fr)
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EP0306428A1 (en
Inventor
Michel Nordlinger
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Laroche Technology Sarl
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Laroche Technology Sarl
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/24—Constructional details adjustable in configuration, e.g. expansible
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/246—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by relative rotation around the supporting spindle or core axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/02—Supporting web roll
    • B65H18/021—Multiple web roll supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/02—Supporting web roll
    • B65H18/04—Interior-supporting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4139—Supporting means for several rolls
    • B65H2301/41398—Supporting means for several rolls juxtaposed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/70—Clutches; Couplings
    • B65H2403/73—Couplings
    • B65H2403/731—Slip couplings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/40—Holders, supports for rolls
    • B65H2405/45—Shafts for winding/unwinding

Definitions

  • the present invention relates to a winding mandrel with friction torque limiter, intended more particularly, but not exclusively, for the simultaneous rewinding on several cores of several strips of any material, for example edge bands.
  • a winding mandrel is known from DE-A-3000893.
  • the object of the invention is to propose a device allowing, in a simple and rapid manner, the positioning and blocking on the rewinding mandrel of said cores as well as their removal, while allowing said mandrel to rotate constantly faster than the device delivering the strips to be rewound.
  • the subject of the invention is a winding mandrel with friction torque limiter, more particularly intended for simultaneous rewinding on several cores of strips of material, characterized in that it consists of a motor shaft on which are threaded coaxially and alternately annular spacers integral in rotation with the shaft and annular drive parts driven by friction by said spacers, the spacers-parts assembly being tightened axially in an adjustable manner, radially expandable segments being carried by each annular drive part and slidably mounted substantially tangentially to said drive parts so as to deviate slightly from the shaft when they are moved in the direction opposite to that of rotation of said shaft.
  • the establishment and locking the rewind cores on the mandrel is particularly quick and easy. It suffices to thread the cores on the mandrel so that each at least partially overlaps a set of expandable segments of one of the drive parts and to cause the cores to drive said segments in rotation in opposite direction to that of the mandrel shaft to block the cores on the latter thanks to the expansion of the segments.
  • This blocking can be done by hand by pressing each core against one of the segments of the drive part concerned, the tangential sliding of the segments relative to the mandrel being ensured either manually, the mandrel being stopped, or, in the case where the mandrel rotates, by pulling the strip to be rewound, previously fixed to the core, or else by the aforesaid simple pressure exerted on the core.
  • the friction limiter constituted by the alternating succession of drive parts and friction spacers constantly ensures on each strip the tension necessary for its rewinding whatever the external diameter of the coil.
  • FIG. 1 shows a mandrel of a winding machine (not shown) comprising a motor shaft 1 provided over its entire length with a groove 2 parallel to its axis 3.
  • a spacer 4 On the shaft 1 are threaded two types of annular parts, namely a spacer 4 and a so-called drive part 5.
  • the parts 4 and 5 are distributed alternately, a drive part 5 being sandwiched between two spacers 4.
  • the spacers 4 are simple flat washers each provided with a radial hole 7 receiving for example a pin 8 penetrating into the groove 2 so that all the spacers 4 are integral in rotation with the shaft 1.
  • the sides of the spacers 4 in contact with the parts 5 are rectified so as to have the same coefficient of friction in line with the different parts 5, the material of which is chosen accordingly.
  • One of the materials known under the trade name "ERTALON” is particularly suitable for the present application.
  • the parts 5 are not keyed onto this shaft but only driven in friction friction rotation by said parts 4.
  • FIG. 1 shows two tightening positions of said nut 11.
  • each drive part 5 comprises (FIGS. 2 and 3) several segments expandable 13. These segments are three in number for each part 5 in the embodiment shown but could be in different numbers, greater than or even less than three.
  • Each segment 13 has an arcuate shape with the same curvature as the external cylindrical face of the bearing parts 5.
  • the segments 13 extend over an arc of a circle slightly less than 120 ° in the retracted position and are housed in a circular groove 14 formed in the periphery of the parts 5 and of rectangular section like the segments.
  • Each segment 13 is articulated, on its internal face and in its central part, for example on an elastic pin 15 coaxial with the axis 3 and passing through a boss 16 integral with the segment.
  • the ends of the pins 15 protrude from the bosses 16 and can freely slide in two parallel grooves 17.
  • the grooves 17 are formed in the flanks opposite the housings 18 produced in each part 5 to receive the bosses 16 of the segments 13, the bosses sliding on the bottom 18a (parallel to the grooves 17) of the housings.
  • the pairs of grooves have ends which are at different distances from the axis 3 of the mandrel and their arrangement is such that when a pin (15 ′, Figure 2) is at the end of the grooves closest to said axis 3 , the segment (13 ′) has an external diameter very slightly greater than that of the part 5, while in the other extreme position (15 ⁇ ) of the pin along the grooves 17, the segment (13 ⁇ ) is in its position of maximum radial expansion.
  • the pin goes from position 15 ′ closest to axis 3, to position 15 ⁇ furthest away by moving along grooves 17 approximately in the opposite direction to the direction of rotation (arrow 19, Figure 2 ) parts 5.
  • edgebands must be wound or rewound are threaded onto the mandrel, the latter being stopped.
  • Each core rests on at least one of the segments of a set of segments of one of the parts 5.
  • the core can possibly be offset axially with respect to said set of segments without any consequence.
  • each core and its drive part or parts 5 is carried out mainly in two ways.
  • the core is pressed with the hand against the underlying segment which projects slightly from parts 4 and 5 and the core is pivoted so as to pass said segment (as well as the other two by means of consequence) from the retracted position 13 ′ to the expanded position 13 ⁇ .
  • the end of the strip to be rewound can then be fixed on the core and the unwinding-rewinding machine started.
  • the band fixed in the stretched position on the core keeps the segments in the expanded position.
  • the mandrel according to the invention is driven at a speed always greater than the speed of unwinding or delivering the strips to be rewound.
  • all the bands being rewound remain constantly in tension which maintains and reinforces the blocking of each core on its drive part or parts 5, said tension being however limited by the friction system provided between the parts 5 and parts 4.
  • the mandrel being stopped, the cores are threaded and the ends of the strips to be rewound fixed to the cores.
  • the machine is then started, the cores locking themselves on the parts 5, the blocking possibly being facilitated by pressing each core for a short time against the mandrel.
  • the cores have a diameter between the extreme diameters of retraction and expansion of the segments.
  • the cores which are usually made of cardboard, are not deformed by the segments 13 due to the large contact surface.
  • the external surface of the segments is advantageously striated or receives an anti-slip treatment.
  • the number of drive parts 5 with expandable segments 13 can of course vary within wide limits depending on the length of the mandrel and the width of each part 5.

Landscapes

  • Winding Of Webs (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Description

La présente invention a trait à un mandrin de bobinage à limiteur de couple à friction, destiné plus particulièrement, mais non exclusivement, au rembobinage simultané sur plusieurs noyaux de plusieurs bandes d'un matériau quelconque, par exemple des bandes de chants. Un tel mandrin de bobinage est connu du DE-A-3000893.The present invention relates to a winding mandrel with friction torque limiter, intended more particularly, but not exclusively, for the simultaneous rewinding on several cores of several strips of any material, for example edge bands. Such a winding mandrel is known from DE-A-3000893.

Le but de l'invention est de proposer un dispositif permettant, de manière simple et rapide, la mise en place et le blocage sur le mandrin de rembobinage desdits noyaux ainsi que leur enlèvement, tout en permettant audit mandrin de tourner constamment plus vite que le dispositif délivrant les bandes à rembobiner.The object of the invention is to propose a device allowing, in a simple and rapid manner, the positioning and blocking on the rewinding mandrel of said cores as well as their removal, while allowing said mandrel to rotate constantly faster than the device delivering the strips to be rewound.

A cet effet, l'invention a pour objet un mandrin de bobinage à limiteur de couple à friction, plus particulièrement destiné au rembobinage simultané sur plusieurs noyaux de bandes de matière, caractérisé en ce qu'il est constitué d'un arbre moteur sur lequel sont enfilées coaxialement et alternativement des entretoises annulaires solidaires en rotation de l'arbre et des pièces d'entraînement annulaires entraînées par friction par lesdites entretoises, l'ensemble entretoises-pièces étant serré axialement de manière réglable, des segments expansibles radialement étant portés par chaque pièce d'entraînement annulaire et montés coulissants sensiblement tangentiellement auxdites pièces d'entraînement de façon à s'écarter légèrement de l'arbre lorsqu'ils sont déplacés dans la direction opposée à celle de rotation dudit arbre.To this end, the subject of the invention is a winding mandrel with friction torque limiter, more particularly intended for simultaneous rewinding on several cores of strips of material, characterized in that it consists of a motor shaft on which are threaded coaxially and alternately annular spacers integral in rotation with the shaft and annular drive parts driven by friction by said spacers, the spacers-parts assembly being tightened axially in an adjustable manner, radially expandable segments being carried by each annular drive part and slidably mounted substantially tangentially to said drive parts so as to deviate slightly from the shaft when they are moved in the direction opposite to that of rotation of said shaft.

Avec un tel dispositif, la mise en place et le blocage sur le mandrin des noyaux de rembobinage est particulièrement rapide et facile. Il suffit d'enfiler sur le mandrin les noyaux de façon que chacun chevauche au moins partiellement un jeu de segments expansibles d'une des pièces d'entraînement et de faire entraîner par les noyaux lesdits segments en rotation en sens inverse de celui de l'arbre du mandrin pour bloquer sur ce dernier les noyaux grâce à l'expansion des segments.With such a device, the establishment and locking the rewind cores on the mandrel is particularly quick and easy. It suffices to thread the cores on the mandrel so that each at least partially overlaps a set of expandable segments of one of the drive parts and to cause the cores to drive said segments in rotation in opposite direction to that of the mandrel shaft to block the cores on the latter thanks to the expansion of the segments.

Ce blocage peut se faire à la main en pressant chaque noyau contre un des segments de la pièce d'entraînement concernée, le coulissement tangentiel des segments relativement au mandrin étant assuré soit manuellement, le mandrin étant à l'arrêt, soit, dans le cas où le mandrin tourne, par traction de la bande à rembobiner, préalablement fixée au noyau, ou bien par la simple pression susdite exercée sur le noyau.This blocking can be done by hand by pressing each core against one of the segments of the drive part concerned, the tangential sliding of the segments relative to the mandrel being ensured either manually, the mandrel being stopped, or, in the case where the mandrel rotates, by pulling the strip to be rewound, previously fixed to the core, or else by the aforesaid simple pressure exerted on the core.

Dans chaque cas, c'est la tension que la bande exerce sur le noyau qui maintient celui-ci en position bloquée sur les segments.In each case, it is the tension that the band exerts on the core which keeps the latter in the locked position on the segments.

A la fin du rembobinage, l'enlèvement des noyaux pleins est tout aussi rapide, les bobines étant désolidarisées du mandrin par une légère rotation par rapport au mandrin (à l'arrêt) dans le sens de rotation normale du mandrin.At the end of the rewinding, the removal of the solid cores is just as fast, the coils being separated from the mandrel by a slight rotation relative to the mandrel (stopped) in the normal direction of rotation of the mandrel.

Ce dernier, par ailleurs, étant entraîné à une vitesse de rotation constamment supérieure à la vitesse de délivrance des bandes à rembobiner, le limiteur à friction constitué par la succession alternée des pièces d'entraînement et des entretoises à friction assure constamment sur chaque bande la tension nécessaire à son rembobinage quel que soit le diamètre externe de la bobine.The latter, moreover, being driven at a speed of rotation constantly greater than the speed of delivery of the strips to be rewound, the friction limiter constituted by the alternating succession of drive parts and friction spacers constantly ensures on each strip the tension necessary for its rewinding whatever the external diameter of the coil.

D'autres caractéristiques et avantages ressortiront de la description qui va suivre d'un mode de réalisation du dispositif de l'invention, description donnée à titre d'exemple uniquement et en regard des dessins annexés sur lesquels:

  • ― Figure 1 est une vue en coupe verticale longitudinale d'un mandrin conforme à l'invention,
  • ― Figure 2 est une vue en élévation latérale et en coupe d'une pièce d'entraînement du dispositif de la figure 1 et
  • ― Figure 3 est une vue en coupe suivant la ligne III-III de la pièce de la figure 2.
Other characteristics and advantages will emerge from the description which follows of an embodiment of the device of the invention, description given by way of example only and with reference to the appended drawings in which:
  • FIG. 1 is a view in longitudinal vertical section of a mandrel according to the invention,
  • - Figure 2 is a side elevational view in section of a drive part of the device Figure 1 and
  • - Figure 3 is a sectional view along line III-III of the part of Figure 2.

On a représenté sur la figure 1 un mandrin d'une machine à bobiner (non représentée) comprenant un arbre moteur 1 muni sur toute sa longueur d'une rainure 2 parallèle à son axe 3.FIG. 1 shows a mandrel of a winding machine (not shown) comprising a motor shaft 1 provided over its entire length with a groove 2 parallel to its axis 3.

Sur l'arbre 1 sont enfilés deux types de pièces annulaires, à savoir une entretoise 4 et une pièce dite d'entraînement 5.On the shaft 1 are threaded two types of annular parts, namely a spacer 4 and a so-called drive part 5.

Dans la partie utile 6 du mandrin les pièces 4 et 5 sont réparties en alternance, une pièce d'entraînement 5 étant prise en sandwich entre deux entretoises 4.In the useful part 6 of the mandrel, the parts 4 and 5 are distributed alternately, a drive part 5 being sandwiched between two spacers 4.

Les entretoises 4 sont de simples rondelles plates munies chacune d'un trou radial 7 recevant par exemple une goupille 8 pénétrant dans la rainure 2 de manière que toutes les entretoises 4 soient solidaires en rotation de l'arbre 1.The spacers 4 are simple flat washers each provided with a radial hole 7 receiving for example a pin 8 penetrating into the groove 2 so that all the spacers 4 are integral in rotation with the shaft 1.

Les flancs des entretoises 4 en contact avec les pièces 5 sont rectifiés de façon à avoir le même coefficient de frottement au droit des différentes pièces 5 dont le matériau est choisi en conséquence. Un des matériaux connus sous la dénomination commerciale "ERTALON" convient particulièrement à la présente application.The sides of the spacers 4 in contact with the parts 5 are rectified so as to have the same coefficient of friction in line with the different parts 5, the material of which is chosen accordingly. One of the materials known under the trade name "ERTALON" is particularly suitable for the present application.

Au contraire des pièces 4 qui sont solidaires en rotation de l'arbre 1, les pièces 5 ne sont pas clavetées sur cet arbre mais uniquement entraînées en rotation par friction par lesdites pièces 4.Unlike the parts 4 which are integral in rotation with the shaft 1, the parts 5 are not keyed onto this shaft but only driven in friction friction rotation by said parts 4.

Du côté de l'extrémité libre de l'arbre 1, les pièces 4, 5 sont retenues par une paire d'entretoises spéciales 9, également clavetées sur l'arbre 1 par des goupilles 8 et entre lesquelles sont disposés des ressorts 10 de pressage des pièces 4, 5 les unes contre les autres.On the side of the free end of the shaft 1, the parts 4, 5 are retained by a pair of special spacers 9, also keyed onto the shaft 1 by pins 8 and between which are arranged springs 10 for pressing pieces 4, 5 against each other.

La pression, réglable, s'exerce à l'aide d'un écrou 11 placé en bout d'arbre 1 et vissé sur l'extrémité filetée 12 de ce dernier. Sur la figure 1 on a représenté deux positions de serrage dudit écrou 11.The pressure, adjustable, is exerted using a nut 11 placed at the end of the shaft 1 and screwed onto the threaded end 12 of the latter. FIG. 1 shows two tightening positions of said nut 11.

Les pièces 4 et 5 sont coaxiales à l'arbre 1 et ont même diamètre extérieur, cependant, chaque pièce d'entraînement 5 comporte (figures 2 et 3) plusieurs segments expansibles 13. Ces segments sont au nombre de trois pour chaque pièce 5 dans le mode de réalisation représenté mais pourraient être en nombre différent, supérieur ou même inférieur à trois.The parts 4 and 5 are coaxial with the shaft 1 and have the same outside diameter, however, each drive part 5 comprises (FIGS. 2 and 3) several segments expandable 13. These segments are three in number for each part 5 in the embodiment shown but could be in different numbers, greater than or even less than three.

Chaque segment 13 a une forme arquée de même courbure que la face cylindrique externe des pièces porteuses 5.Each segment 13 has an arcuate shape with the same curvature as the external cylindrical face of the bearing parts 5.

Dans le mode de réalisation représenté les segments 13 s'étendent sur un arc de cercle légèrement inférieur à 120° en position rétractée et sont logés dans une gorge circulaire 14 ménagée dans le pourtour des pièces 5 et de section rectangulaire comme les segments.In the embodiment shown, the segments 13 extend over an arc of a circle slightly less than 120 ° in the retracted position and are housed in a circular groove 14 formed in the periphery of the parts 5 and of rectangular section like the segments.

Chaque segment 13 est articulé, sur sa face interne et dans sa partie centrale, par exemple sur une goupille élastique 15 coaxiale à l'axe 3 et traversant un bossage 16 solidaire du segment.Each segment 13 is articulated, on its internal face and in its central part, for example on an elastic pin 15 coaxial with the axis 3 and passing through a boss 16 integral with the segment.

Les extrémités des goupilles 15 dépassent des bossages 16 et peuvent librement coulisser dans deux rainures parallèles 17.The ends of the pins 15 protrude from the bosses 16 and can freely slide in two parallel grooves 17.

Les rainures 17 sont ménagées dans les flancs en regard des logements 18 réalisés dans chaque pièce 5 pour recevoir les bossages 16 des segments 13, les bossages glissant sur le fond 18a (parallèle aux rainures 17) des logements.The grooves 17 are formed in the flanks opposite the housings 18 produced in each part 5 to receive the bosses 16 of the segments 13, the bosses sliding on the bottom 18a (parallel to the grooves 17) of the housings.

Les paires de rainures présentent des extrémités qui sont à des distances différentes de l'axe 3 du mandrin et leur agencement est tel que lorsqu'une goupille (15′, Figure 2) est à l'extrémité des rainures la plus proche dudit axe 3, le segment (13′) présente un diamètre externe très légèrement supérieur à celui de la pièce 5, alors que dans l'autre position extrême (15˝) de la goupille le long des rainures 17, le segment (13˝) est dans sa position d'expansion radiale maximale.The pairs of grooves have ends which are at different distances from the axis 3 of the mandrel and their arrangement is such that when a pin (15 ′, Figure 2) is at the end of the grooves closest to said axis 3 , the segment (13 ′) has an external diameter very slightly greater than that of the part 5, while in the other extreme position (15˝) of the pin along the grooves 17, the segment (13˝) is in its position of maximum radial expansion.

Par ailleurs, la goupille passe de la position 15′ la plus rapprochée de l'axe 3, à la position 15˝ la plus éloignée en se déplaçant le long des rainures 17 approximativement en sens contraire du sens de rotation (flèche 19, figure 2) des pièces 5.Furthermore, the pin goes from position 15 ′ closest to axis 3, to position 15˝ furthest away by moving along grooves 17 approximately in the opposite direction to the direction of rotation (arrow 19, Figure 2 ) parts 5.

Une série de noyaux indépendants sur lesquels doivent être bobinées ou rembobinées des bandes de chants par exemple, sont enfilés sur le mandrin, celui-ci étant à l'arrêt.A series of independent cores on which edgebands must be wound or rewound, for example, are threaded onto the mandrel, the latter being stopped.

Chaque noyau repose sur au moins l'un des segments d'un jeu de segments de l'une des pièces 5.Each core rests on at least one of the segments of a set of segments of one of the parts 5.

Il est à noter que le noyau peut être éventuellement décalé axialement par rapport audit jeu de segments sans aucune conséquence.It should be noted that the core can possibly be offset axially with respect to said set of segments without any consequence.

Le blocage ou verrouillage entre chaque noyau et sa ou ses pièces d'entraînement 5 s'effectue principalement de deux manières.The blocking or locking between each core and its drive part or parts 5 is carried out mainly in two ways.

Par exemple on appuie avec la main le noyau contre le segment sous-jacent qui fait légèrement saillie par rapport aux pièces 4 et 5 et l'on fait pivoter le noyau de façon à faire passer ledit segment (ainsi que les deux autres par voie de conséquence) de la position rétractée 13′ à la position expansée 13˝. On peut alors fixer sur le noyau l'extrémité de la bande à rembobiner et mettre en marche la machine de débobinage-rembobinage. Avant le démarrage du mandrin la bande fixée en position tendue sur le noyau maintient les segments en position expansée.For example, the core is pressed with the hand against the underlying segment which projects slightly from parts 4 and 5 and the core is pivoted so as to pass said segment (as well as the other two by means of consequence) from the retracted position 13 ′ to the expanded position 13˝. The end of the strip to be rewound can then be fixed on the core and the unwinding-rewinding machine started. Before starting the mandrel, the band fixed in the stretched position on the core keeps the segments in the expanded position.

Pendant toute la durée de l'opération, le mandrin selon l'invention est entraîné à une vitesse toujours supérieure à la vitesse de débobinage ou de délivrance des bandes à rembobiner. Par suite, toutes les bandes en cours de rembobinage demeurent constamment en tension ce qui maintient et renforce le blocage de chaque noyau sur sa ou ses pièces d'entraînement 5, ladite tension étant toutefois limitée par le système à friction prévu entre les pièces 5 et les pièces 4.Throughout the duration of the operation, the mandrel according to the invention is driven at a speed always greater than the speed of unwinding or delivering the strips to be rewound. As a result, all the bands being rewound remain constantly in tension which maintains and reinforces the blocking of each core on its drive part or parts 5, said tension being however limited by the friction system provided between the parts 5 and parts 4.

Suivant une autre manière de procéder, le mandrin étant à l'arrêt, les noyaux sont enfilés et les extrémités des bandes à rembobiner fixées aux noyaux. La machine est alors mise en route, les noyaux se bloquant d'eux-mêmes sur les pièces 5, le blocage pouvant éventuellement être facilité en pressant un court instant chaque noyau contre le mandrin.According to another way of proceeding, the mandrel being stopped, the cores are threaded and the ends of the strips to be rewound fixed to the cores. The machine is then started, the cores locking themselves on the parts 5, the blocking possibly being facilitated by pressing each core for a short time against the mandrel.

L'enlèvement des noyaux pleins est tout aussi aisé et rapide. Il suffit d'entraîner à la main chaque bobine dans le sens de rotation normale du mandrin pour replacer les segments de la position expansée 13˝ à la position rétractée 13′ permettant le libre passage des noyaux au dessus des segments.Removal of solid cores is just as easy and quick. It suffices to manually drive each coil in the normal direction of rotation of the mandrel to replace the segments from the expanded position 13˝ to the retracted position 13 ′ allowing the free passage of the cores above the segments.

Les noyaux ont un diamètre compris entre les diamètres extrêmes de rétraction et d'expansion des segments.The cores have a diameter between the extreme diameters of retraction and expansion of the segments.

Il est à noter que la différence entre ces deux diamètres extrêmes est suffisante pour permettre au dispositif de l'invention d'entraîner des noyaux pouvant avoir de légères variations du diamètre intérieur.It should be noted that the difference between these two extreme diameters is sufficient to allow the device of the invention to drive cores which may have slight variations in the internal diameter.

Il est également à noter que les noyaux, qui sont habituellement en carton, ne sont pas déformés par les segments 13 du fait de la surface de contact importante. Pour éviter le glissement entre les segments et les noyaux la surface externe des segments est avantageusement striée ou reçoit un traitement anti-glisse.It should also be noted that the cores, which are usually made of cardboard, are not deformed by the segments 13 due to the large contact surface. To avoid sliding between the segments and the cores, the external surface of the segments is advantageously striated or receives an anti-slip treatment.

Le nombre des pièces d'entraînement 5 à segments expansibles 13 peut bien entendu varier dans de larges mesures en fonction de la longueur du mandrin et de la largeur de chaque pièce 5.The number of drive parts 5 with expandable segments 13 can of course vary within wide limits depending on the length of the mandrel and the width of each part 5.

Claims (4)

1. Winding spindle with a friction torque limiter, intended particularly for the simultaneous rewinding of strips of material onto several cores, formed by a drive shaft (1) onto which are slipped coaxially and in alternation annular sleeves (4) secured so as to rotate with the shaft and annular driving pieces (5) driven by friction by the said sleeves, the assembly of sleeves and pieces being clamped axially in an adjustable manner, characterised in that radially expandable segments (13) are carried by each annular driving piece (5) and slidingly mounted substantially tangential to the said driving pieces so as to move away slightly from the shaft (1) when they are moved in the direction opposite to the direction of rotation of the said shaft.
2. Spindle according to claim 1, characterised in that each driving piece (5) has a peripheral circular recess (14) in which are accommodated at least two curved segments (13), each articulated in their central part (16) on a pin or similar (15) parallel to the axis (3) of the drive shaft (1) and movable between a first position (15') in which the said pin is at its closest to the segment (13) and a second position (15") of maximum separation, in two parallel grooves (17) provided in the housing (18) for accommodating the said segment.
3. Spindle according to claim 2, characterised in that each driving piece (5) has three segments (13) each covering an arc of slightly less than 120° in the retracted position, the external diameter of the segments (13) being slightly greater than that of the driving pieces (5), flutes or other anti-slip means being provided on the external face of the segments.
4. Spindle according to one of claims 1 to 3, characterised in that the said assembly of sleeves (4) and driving pieces (5) is clamped together by means of two sleeves (9) slipped onto the spindle and between which are arranged springs (10) and by means of a nut (11) screwed onto the threaded end (12) of the drive shaft (1).
EP88450030A 1987-08-04 1988-08-04 Winding mandrel to limit frictional torque Expired - Lifetime EP0306428B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8711175A FR2619096B1 (en) 1987-08-04 1987-08-04 FRICTION TORQUE LIMITER WINDING CHUCK
FR8711175 1987-08-04

Publications (2)

Publication Number Publication Date
EP0306428A1 EP0306428A1 (en) 1989-03-08
EP0306428B1 true EP0306428B1 (en) 1991-10-30

Family

ID=9353950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88450030A Expired - Lifetime EP0306428B1 (en) 1987-08-04 1988-08-04 Winding mandrel to limit frictional torque

Country Status (6)

Country Link
EP (1) EP0306428B1 (en)
KR (1) KR0132215B1 (en)
DE (1) DE3865933D1 (en)
ES (1) ES2026685T3 (en)
FR (1) FR2619096B1 (en)
PT (1) PT88185B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161061A (en) * 1938-01-08 1939-06-06 Edward H Edelman Expansible mandrel
GB1079188A (en) * 1965-06-30 1967-08-16 Berta Kampf Winding shafts
US3718302A (en) * 1971-01-29 1973-02-27 Midland Ross Corp Coil and mandrel separating machinery
DE3000893C2 (en) * 1980-01-11 1986-11-27 Slavjanskij filial Vsesojuznogo naučno-issledovatel'skogo i proektno-konstruktorskogo instituta metallurgičeskogo mašinostroenija, Slavjansk, Doneckaja oblast' Winding mandrel for parallel winding of strip material under tension

Also Published As

Publication number Publication date
PT88185A (en) 1989-06-30
FR2619096B1 (en) 1989-12-29
EP0306428A1 (en) 1989-03-08
PT88185B (en) 1993-09-30
DE3865933D1 (en) 1991-12-05
FR2619096A1 (en) 1989-02-10
KR0132215B1 (en) 1998-04-11
KR890004294A (en) 1989-04-21
ES2026685T3 (en) 1992-05-01

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