EP0639529B1 - Dispositif et procédé pour visser des fermetures à vis - Google Patents

Dispositif et procédé pour visser des fermetures à vis Download PDF

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Publication number
EP0639529B1
EP0639529B1 EP19930112741 EP93112741A EP0639529B1 EP 0639529 B1 EP0639529 B1 EP 0639529B1 EP 19930112741 EP19930112741 EP 19930112741 EP 93112741 A EP93112741 A EP 93112741A EP 0639529 B1 EP0639529 B1 EP 0639529B1
Authority
EP
European Patent Office
Prior art keywords
torque
screwing
controller
distance
screw
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
EP19930112741
Other languages
German (de)
English (en)
Other versions
EP0639529A1 (fr
Inventor
Patricia Heinlein
Manfred Brand
Robert Engelhardt
Rainer Muss
Klaus Vogel
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE59300313T priority Critical patent/DE59300313D1/de
Priority to EP19930112741 priority patent/EP0639529B1/fr
Publication of EP0639529A1 publication Critical patent/EP0639529A1/fr
Application granted granted Critical
Publication of EP0639529B1 publication Critical patent/EP0639529B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B3/00—Closing bottles, jars or similar containers by applying caps
    • B67B3/20—Closing bottles, jars or similar containers by applying caps by applying and rotating preformed threaded caps
    • B67B3/2073—Closing bottles, jars or similar containers by applying caps by applying and rotating preformed threaded caps comprising torque limiting means
    • B67B3/208—Electrical means responsive to the torque applied and acting on motor control means, e.g. strain gauges or power measurement means

Definitions

  • Device and method for screwing on screw closures in particular screw closures with a tamper-evident locking ring that spans a transfer ring on the bottle neck, comprising a rotationally drivable screw cap that engages or spills over the screw cap and is arranged at the free front end of a drive shaft, the drive shaft via an electromagnetic clutch can be coupled to the rotary shaft of a rotary drive to form a drive clutch, the screw attachment being mounted so that it can move up and down to engage the screw cap, a brake magnetic clutch being arranged between the drive shaft carrying the screw attachment and a rotationally fixed clutch housing surrounding the electromagnetic clutch is, and wherein a sensor for detecting the screwing torque is provided.
  • the invention relates to a method in which it is provided that the rotary drive is braked towards the end of the screwing-on process by an electromagnetic brake clutch.
  • the invention is based on the fact that - as already discussed in the generic document - with conventional screwing devices and methods it is possible to automatically screw a closure cap loosely placed on a filled container.
  • the rotary drive and the electromagnetic clutch are designed in known arrangements so that the screwing resistance is reliably overcome when screwing on.
  • the torque must be set relatively high, so that it is guaranteed that irregularities, for example on the threaded neck of glass bottles, and the increased Resistance when slipping on the tamper-evident ring on the cap can be reliably overcome using a transfer ring on the bottle.
  • this also means that in some cases the closing torque is so high that the screwed-on closure can hardly be opened by older or frail people.
  • the object of the invention is to improve the generic device and the generic method even further, so that this also meets the highest requirements for a defined closure torque, as are made in particular by the pharmaceutical industry when unscrewing closure caps for pharmaceutical bottles can be.
  • a device for detecting the lowering path of the screw attachment that the sensor for detecting the torque is designed as a torque sensor continuously detecting the torque present in each case, that the torque transmitter is followed by a controller such that the output signal of the torque transmitter is supplied to the controller as the actual value of the torque, an output of the controller being connected to the brake magnetic coupling in order to compare the stored setpoint value or setpoint curve dependent on the screw-on travel distance with the actual values supplied by the torque transmitter and by Adjust devices for influencing the current strength or current duration or current pulse duration of the brake magnetic clutch to the predetermined target values.
  • the magnetic brake clutch is not only used to maximize the torque from a certain distance to bring quickly to zero, but a very defined torque is adjusted so that a predetermined locking torque is reliably achieved.
  • a fundamentally improved reproducibility of the closing process can be achieved, whereby on the one hand it is ensured that the closure cap is always completely screwed on and on the other hand an excessive closing torque which prevents reopening is avoided.
  • a device for continuously detecting the lowering path is provided, the output of which is connected to an input of the controller.
  • This device is advantageously designed as an incremental encoder, it being possible for a rack to be arranged on the outside of the housing of the device, in which a gearwheel of the stationary incremental encoder engages.
  • the above-mentioned object is also achieved by a method which is characterized in that a desired course of the torque as a function of the screw-on travel distance is stored in the controller, that the lowering travel is detected by means of a corresponding encoder with each individual screw-on process, and that Setpoint torque stored for the respective amount of the lowering path is compared with the actual torque determined by the torque transmitter and the brake clutch is more or less engaged according to the deviation.
  • the activation of the brake magnetic clutch depending on the required correction can be done so that the amplitude of the current through the magnet windings is changed or that a kind of pulse width modulation is used, so that the effective duration of current is changed by changing the width and, if necessary, plus the height of the pulses can be.
  • the control is preferably carried out exclusively via the brake clutch, whereas the drive clutch remains permanently and uniformly energized. This naturally presupposes that the braking effect of the brake clutch and accordingly, their dimensioning is such that, despite the current being supplied to the drive clutch, braking to zero torque is possible, if necessary.
  • the control of the torque starts at the lowering distance that corresponds to the overlapping of the lower edge of the transfer ring by the lower edge of the tamper-evident ring on the closure cap.
  • a relatively high torque has to be used in order to overcome irregularities in the thread on the one hand and the thickening caused by the transfer ring on the other hand.
  • the required torque then drops significantly, and the control according to the invention is then used to achieve the desired locking torque.
  • the control is advantageously set and transitioned from controlled operation to a state in which the maximum braking effect is used and the torque acting on the screw cap is brought to zero. Accordingly, it is ensured that the screw cap has a defined end position and at the same time a defined closing torque.
  • an output of the controller with a memory or recorder for logging the torque values achieved with each individual screwing operation. Accordingly, when bottles with high-quality products are closed, particularly in the pharmaceutical sector, a high level of quality assurance of the filled bottles can be achieved, which was not possible with conventional closing techniques.
  • the device shown in FIG. 1 comprises a screw attachment 1, which is dimensioned such that it can grip a screw cap, not shown in FIG. 1, placed loosely on a container neck .
  • the screw attachment is fastened to a drive shaft 2, which is mounted in a first housing part 5 via a ball bearing 3 for absorbing the radial forces and an axial ball bearing 4 for absorbing the axial forces.
  • a ball bearing 3 for absorbing the radial forces
  • an axial ball bearing 4 for absorbing the axial forces.
  • two star couplings 29 and 30 is the Drive shaft 2 with the drive shaft 12 rotatably connected with an intermediate torque sensor.
  • This torque transmitter Md is formed by a product which is commercially available as such and is therefore not shown in detail. Because of its arrangement, this torque transmitter Md can detect the screw-on torque that is transmitted by the screw-on device 1.
  • a magnetizable disc 6 with a flange extension comprising the drive shaft 12 forms, together with a coil 8, which is supplied with current via a schematically indicated line 9, an electromagnetic brake clutch 10.
  • the magnetizable disc 6 and the flange extension 7 are with the drive shaft 12 non-rotatably connected.
  • the coil 8 is arranged rotatably relative to the housing part 5.
  • a coil 13 is arranged, which is also mounted in a rotationally fixed manner with respect to the housing part 5, and in which a magnetic flange part 14 connected to the shaft 28 in a rotationally fixed manner engages.
  • a corresponding flange part 16 is mounted over a narrow horizontal gap, separated from the flange part 14 by means of an axial ball bearing 15, and is connected in a rotationally fixed manner to the shaft 17 by means of a tooth coupling 11 with a rotary drive (not shown).
  • the two flange parts 14 and 16 together with the coil 13 form an electromagnetic clutch 20.
  • This electromagnetic clutch 20 transmits a defined torque corresponding to the current supplied via a line 21 to the coil 13 from the shaft 17 to the drive shaft 12 and via the torque transmitter Md the shaft 2 which carries the screw attachment 1. Accordingly, the electromagnetic clutch 20 functions as a drive clutch.
  • the housing 5 or 19 is lowered over the base plate 22 in the direction of the arrow 23, the electromagnetic Clutch 20, that is, the drive clutch, is activated by switching on the current through the coil 13. Accordingly, the screw attachment 1 rotates and the screw cap is screwed on, the housings 5, 19 being continuously lowered together with the rotary drive.
  • the progress of the lowering process is detected by a rack 25 attached to the outside of the base plate 22, which drives a gear 26 of an incremental encoder, not shown in the drawing, the gear 26, as indicated at 27, being mounted in a stationary manner.
  • the screw-on torque F is a function of the screw-on distance s, i.e. from the progressive lowering movement of the screw head 1, as detected by the incremental encoder via the gear 26.
  • arrows indicate whether a rotary or lowering or lifting movement is taking place.
  • the respective phase of the screwing process is also shown below the axis s.
  • the screwing-on process is described with reference to the screwing on of a closure cap with a tamper-evident locking ring and a drip insert, which is screwed onto a bottle which has an external thread on the bottle neck and a transfer ring which, after unscrewing during the closing process and after unscrewing the closure cap during use holds back the tamper-evident ring on the bottle neck in a manner known per se and thus makes it recognizable that the bottle has already been opened once in use.
  • the cap is lowered into the position shown in Fig. 2b, from which the screwdriver 1 is engaged and the cap rotates, so that their internal thread comes into engagement with the external thread of the bottle neck, which increases the torque.
  • An additional increase in torque is due to the fact that, starting from this phase, the drip insert is pushed into the inside of the bottle neck and reaches the position shown in FIG. 2c.
  • phase a further increase in the torque occurs in that the tamper-evident ring 29 is pushed over the edge of the transfer ring until the lower edge of the tamper-evident ring 29 engages over the lower edge of the transfer ring.
  • the required torque suddenly drops, as shown between phases c and d in the drawing, and the control according to the invention is used here starting from this way point, with phase d regulating to a constant torque value is screwed further down and then in phase e the torque value is increased until the desired locking torque.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Jars (AREA)
  • Closures For Containers (AREA)

Claims (10)

  1. Dispositif pour visser des fermetures à vis, en particulier des fermetures à vis comprenant un anneau d'inviolabilité qui recouvre un anneau de transfert du goulot du flacon, comprenant un embout de vissage qui peut être entraîné en rotation et saisit ou recouvre le bouchon vissable (1) et qui est disposé à l'extrémité avant libre d'un arbre d'entraînement (2), l'arbre d'entraînement (2) pouvant être accouplé par un embrayage électromagnétique (20) à l'arbre entraîné en rotation d'un dispositif d'entraînement en rotation pour former un accouplement moteur, l'embout de vissage (1) étant monté avec une possibilité de déplacement ascendant et descendant pour agir sur le bouchon vissable, un embrayage à aimant-frein (10) étant disposé entre l'arbre d'entraînement portant l'embout de vissage et un carter d'embrayage fixe en rotation et entourant l'embrayage électromagnétique (20), et un capteur étant prévu pour enregistrer le couple de vissage, caractérisé en ce qu'il est prévu un dispositif pour enregistrer la course descendante de l'embout de vissage, en ce que le capteur d'enregistrement du couple est conçu sous la forme d'un transmetteur de couple (Md) qui capte en continu le couple instantané, en ce qu'en aval du transmetteur de couple (Md) est connecté un régulateur, de façon que le signal de sortie du transmetteur de couple (Md) soit envoyé au régulateur à titre de valeur réelle du couple, une sortie du régulateur étant connectée à l'embrayage à aimant-frein (10) pour établir les valeurs de consigne prédéfinies à l'aide d'une comparaison entre une valeur de consigne ou une courbe de valeur de consigne mémorisée en fonction de la course de vissage et les valeurs réelles fournies par le transmetteur de couple (Md) et à l'aide de dispositifs permettant d'influer sur l'intensité du courant ou sur la durée de passage du courant ou sur la durée d'impulsion de passage du courant de l'embrayage à aimant-frein (10).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'il est prévu un dispositif qui est destiné à enregistrer en continu la course descendante et dont la sortie est connectée au régulateur.
  3. Dispositif selon la revendication 2, caractérisé en ce que le dispositif d'enregistrement de la course descendante est un transmetteur incrémentiel.
  4. Dispositif selon la revendication 3, caractérisé en ce que, sur le côté extérieur du carter (5) du dispositif, est montée une crémaillère (25) dans laquelle s'engage une roue dentée (26) du transmetteur incrémentiel monté fixe.
  5. Procédé de vissage de fermetures à vis au moyen d'un dispositif selon la revendication 1, caractérisé en ce que, dans le régulateur, est mémorisée une courbe souhaitée du couple en fonction de la course de vissage, en ce qu'à chaque vissage, la course descendante est enregistrée au moyen d'un transmetteur correspondant, et en ce que le couple de consigne mémorisé pour chaque valeur de course descendante est comparé avec le couple réel déterminé par le transmetteur de couple et, en fonction de l'écart constaté, l'embrayage de freinage est plus ou moins fortement embrayé.
  6. Procédé selon la revendication 5, caractérisé en ce que la régulation du couple s'effectue lors de la course descendante correspondant au recouvrement du bord inférieur de l'anneau de transfert par le bord inférieur de l'anneau d'inviolabilité.
  7. Procédé selon la revendication 6, caractérisé en ce que le couple de vissage est d'abord maintenu constant après le début de la régulation et porté ensuite à une valeur finale correspondant au couple de fermeture recherché.
  8. Procédé selon la revendication 5, caractérisé en ce que la régulation est mise en oeuvre après que la valeur prédéfinie de couple de fermeture a été atteinte, et en ce que le couple agissant sur le bouchon vissable est ramené vers zéro en exploitant l'effet de freinage maximal.
  9. Procédé selon la revendication 5, caractérisé en ce qu'une sortie du régulateur est connectée à une mémoire ou à une imprimante pour tenir le procès-verbal des valeurs de couple atteintes à chaque vissage.
  10. Procédé selon la revendication 5, caractérisé en ce que, si le couple de fermeture prévu n'est pas atteint pour des raisons ponctuelles lors d'un vissage déterminé, un message d'erreur est délivré et, le cas échéant, un éjecteur est actionné pour écarter le flacon dont le bouchage n'est pas conforme.
EP19930112741 1993-08-09 1993-08-09 Dispositif et procédé pour visser des fermetures à vis Expired - Lifetime EP0639529B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59300313T DE59300313D1 (de) 1993-08-09 1993-08-09 Vorrichtung und Verfahren zum Aufschrauben von Schraubverschlüssen.
EP19930112741 EP0639529B1 (fr) 1993-08-09 1993-08-09 Dispositif et procédé pour visser des fermetures à vis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19930112741 EP0639529B1 (fr) 1993-08-09 1993-08-09 Dispositif et procédé pour visser des fermetures à vis

Publications (2)

Publication Number Publication Date
EP0639529A1 EP0639529A1 (fr) 1995-02-22
EP0639529B1 true EP0639529B1 (fr) 1995-06-28

Family

ID=8213154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930112741 Expired - Lifetime EP0639529B1 (fr) 1993-08-09 1993-08-09 Dispositif et procédé pour visser des fermetures à vis

Country Status (2)

Country Link
EP (1) EP0639529B1 (fr)
DE (1) DE59300313D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220306442A1 (en) * 2019-06-10 2022-09-29 Sidel Participations Capping machine for applying capsules on respective containers in aseptic or ultraclean conditions

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10245879A1 (de) * 2002-09-30 2004-04-08 Elau Elektronik Automations Ag Vorrichtung zum Anbringen von Schraubverschlüssen
DE10348054A1 (de) * 2003-10-16 2005-05-19 Groninger & Co Gmbh Halteeinrichtung mit Momentbegrenzung für in Teile einzuschraubende Gegenstände
US20090255214A1 (en) * 2005-09-09 2009-10-15 Alcoa Deutschland Gmbh Closing device for applying screw tops to containers
DE102006025811A1 (de) * 2006-05-31 2007-12-06 Khs Ag Verfahren zur Bestimmung des Verschließ-Endmoments beim Verschließen von Flaschen oder dergleichen Behälter sowie Verschließmaschine
DE102009045637A1 (de) * 2009-10-13 2011-04-14 Krones Ag Verfahren und Vorrichtung zum Schraubverschließen von Gefäßen, insbesondere Flaschen
CN103671921A (zh) * 2013-11-07 2014-03-26 南京化工职业技术学院 端面摩擦扭矩可控的机械密封装置
CN110550590A (zh) * 2019-10-12 2019-12-10 广州达意隆包装机械股份有限公司 一种旋盖头

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535583A (en) * 1982-10-04 1985-08-20 Shibuya Kogyo Co., Ltd. Rotary type capping apparatus
FR2629440A1 (fr) * 1988-04-01 1989-10-06 Servajean Roger Dispositif de vissage d'un element sur un organe presentant au moins une portee filetee notamment
DE4011398C2 (de) * 1990-04-09 1994-09-22 Alcoa Gmbh Verpackwerke Vorrichtung und Verfahren zum Aufbringen von Schraubverschlüssen auf Behälter
DE4131910C2 (de) * 1991-09-25 1994-04-07 Heinlein Plastik Technik Gmbh Vorrichtung und Verfahren zum Aufschrauben von Schraubverschlüssen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220306442A1 (en) * 2019-06-10 2022-09-29 Sidel Participations Capping machine for applying capsules on respective containers in aseptic or ultraclean conditions
US11760616B2 (en) * 2019-06-10 2023-09-19 Sidel Participations Capping machine for applying capsules on respective containers in aseptic or ultraclean conditions

Also Published As

Publication number Publication date
DE59300313D1 (de) 1995-08-03
EP0639529A1 (fr) 1995-02-22

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