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WO1993001006A1 - Dispositif permettant de trier des produits en forme de disque - Google Patents

Dispositif permettant de trier des produits en forme de disque Download PDF

Info

Publication number
WO1993001006A1
WO1993001006A1 PCT/SE1992/000340 SE9200340W WO9301006A1 WO 1993001006 A1 WO1993001006 A1 WO 1993001006A1 SE 9200340 W SE9200340 W SE 9200340W WO 9301006 A1 WO9301006 A1 WO 9301006A1
Authority
WO
WIPO (PCT)
Prior art keywords
disc
sideboard
channel
ring
top face
Prior art date
Application number
PCT/SE1992/000340
Other languages
English (en)
Inventor
Henry Gustavsson
Original Assignee
Gordic Ab
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 Gordic Ab filed Critical Gordic Ab
Publication of WO1993001006A1 publication Critical patent/WO1993001006A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size
    • B07B13/07—Apparatus in which aggregates or articles are moved along or past openings which increase in size in the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size

Definitions

  • the present invention generally relates to a device for feeding circular, flat objects, such as tablets of different types, from a manufacturing plant, an interme ⁇ diate storage or the like, to a packing station or a stor ⁇ age for finished products. More specifically, the inven ⁇ tion relates to a device which is designed for sorting round, flat products, especially different types of tab- lets, and which while feeding the tablets sorts out such tablets as deviate from a predetermined shape.
  • tablettes generally refers to pharmaceutical products in solid form, such as tablets for chewing, swallowing or tablets in the form of effer- vescent tablets, but the present application also com ⁇ prises other products in tablet form on which special demands are placed in respect of dosage etc., such as detergents in the form of effervescent tablets.
  • Sorting tablets in a production line may be done con- tinuously or batchwise, the tablets discharged from a tab ⁇ let press being passed, when fed towards the packing sta ⁇ tion, through a sorting device, in which damaged tablets or tablets of a shape deviating from a predetermined one are sorted out. Sorting out such damaged or shape-deviat- ing tablets is not done for aesthetic reasons only, but primarily to meet the demands for dosing safety that are placed on pharmaceutical products, especially in tablet form.
  • DE-OS-21 25 666 which relates to a device for sorting tablet-like objects
  • WO 89/090908 which relates to a method and a device for sorting round objects.
  • a distinctive feature of the device disclosed in DE- OS-21 25 666 is that tablets are caused to pass a driven roller or disc pressing each tablet against an outer wall of a downwardly open channel in this section. Tablets hav ⁇ ing too small a diameter will not be engaged with the disc and the outer wall, but drop through the opening in the bottom of the channel.
  • the device described in WO 89/09098 has only a remote bearing on the technical field described in this applica ⁇ tion.
  • the known device is designed for sorting out cap ⁇ sules deviating from a desired shape, in a two-step opera ⁇ tion.
  • the capsules pass into "pockets" in a rotary disc, undersize capsules falling out of the pockets in a first step.
  • oversize capsules are sorted out by measuring the time during which a capsule remains in the second sorting step.
  • oversize capsules will remain longer in the second sorting step than capsules having the desired shape, and are discarded.
  • the device disclosed in WO 89/09098 is of a complex design, which makes such a device quite costly. Without extensive modi ⁇ fications, it would not be possible to use this device for sorting tablets according to the present invention. In practical use, the device according to DE-OS-
  • a first object of the present invention is thus to provide a sorting device which, during simultaneous feed ⁇ ing, is more gentle on the products fed to it.
  • a second object of the invention is to provide a feeding and sorting device whose capacity is conformed to the capacity of the tablet press and/or the packing sta ⁇ tion.
  • a third object of the invention is to provide a feed ⁇ ing and sorting device which is of a relatively simple design and, hence, cost-effective.
  • Fig. 1 is a top plan view of a feeding and sorting device according to the invention with a plurality of tab ⁇ lets fed to the device.
  • Fig. 2 is a partly broken-away sectional view taken along the line A-A in Fig. 1.
  • Fig. 3 is a partly broken-away sectional view taken along the line B-B in Fig. 1.
  • Fig. 4 is a partly broken-away sectional view taken along the line C-C in Fig. 1.
  • Fig. 5 is a partly broken-away sectional view taken along the line D-D in Fig. 1.
  • Fig. 6 is a partly broken-away sectional view taken along the line E-E in Fig. 1.
  • Fig. 1 shows a device 2 for sorting and feeding tab- lets 4 from a tablet press or an intermediate storage to a packing station or a storage for finished products.
  • the device comprises a circular ring 12 supported by rollers 6, 8, 10. At least one roller 6, 8 or 10 is driven and engages the circular ring 12.
  • the engagement between the driving roller (rollers) is brought about in known manner by frictional contact between the roller and the ring, or in any other suitable manner, for instance by providing the outer edge of the ring with teeth meshing with a driv ⁇ ing roller designed as a gear wheel.
  • the circular ring 12 is driven at a rotational speed v « in a given direction, clockwise or counterclockwise.
  • a circular disc 16 disposed inwardly of an inner edge 14 of the circular ring 12 has a top face 18 located in the same plane as a top face 20 of the ring 12.
  • the centre of the disc is how ⁇ ever offset in relation to the centre of the ring.
  • the disc 16 has such a diameter that there is formed a gap 22 between the outer edge of the disc and the inner edge 14 of the ring, the width of this gap varying in the circum ⁇ ferential direction of the disc 16 because this is eccen ⁇ trically disposed in relation to the circular ring 12.
  • the disc 16 is driven, either by being mounted directly on the shaft of a motor (not shown) or in any other convenient manner, for instance via a belt pulley mounted on a common shaft.
  • the disc is driven at a speed v. and rotates in the same direction as the circular ring 12, clockwise or counterclockwise.
  • the speed v. is however different from the speed v 2 for reasons which will be given further on in connection with the description of the operation of the device.
  • An arm 24 is extended in a plane parallel to the disc and to the ring, and is mounted in a suitable manner imme- diately above the top face 18 of the disc.
  • one end of the arm 24 may be mounted at a pin 26 at the centre of the disc.
  • the other end of the arm 24 is cantilevered and, in a preferred embodiment of the invention, connected to a flexible member 28.
  • the arm 24 may however be mounted in another way, for instance by means of a clamp (not shown) fixing the arm in the desired position.
  • the arm is not cantilevered, which is not compulsory for achieving the technical function aimed at.
  • the arm 24 and the optional, flexible member 28 are bent away from the pin 26 in the direction of rotation of the disc.
  • the device 2 has an inner sideboard 30 and an outer sideboard 32, which are concentrical with the disc 16.
  • the distance between the inner sideboard 30 and the outer sideboard 32 is thus constant and only slightly greater than the diameter of the type of tablet to be sorted.
  • the inner sideboard 30 is arranged immediately above the top face 18 of the disc at a small distance inwardly of the disc edge.
  • the outer sideboard 32 is dis ⁇ posed at a constant distance from the inner sideboard which only slightly exceeds the diameter of the the tablet type concerned, immediately above the top face 20 of the circular ring.
  • the surface of the top face 20 of the ring located inwardly of the outer sideboard 32 will vary.
  • the maximum width of the gap 22 is but slightly smaller than the diameter of the tablet type con- cerned. Therefore, the inner edge 14 of the circular ring is always located between the outer sideboard 32 and the inner sideboard 30.
  • the surface of the top face 20 of the ring enclosed between the outer sideboard 32 and the inner sideboard 30 will however vary.
  • the inner sideboard 30 is provided, within a certain section there ⁇ of, with a slot 34 extending in the circumferential direc ⁇ tion.
  • the slot 34 has a height which slightly exceeds the thickness of the tablet type concerned. Since the height of the slot is limited, only one tablet at a time can pass through it under the inner sideboard 30 and into the chan ⁇ nel defined between the outer sideboard 32 and the inner sideboard 30. It has proved advantageous to give the slot a length corresponding to a quarter, or slightly more, of the circumference of the inner sideboard 30. The beginning of the slot thus corresponds to the beginning of the chan ⁇ nel.
  • FIG. 1 A plurality of tablets 4 are fed continuously, or batchwise, to the device 2 and enter on the right-hand part of the disc 16 shown in Fig. 1.
  • the disc 16 and the circular ring 12 rotate counterclockwise.
  • the tab ⁇ lets are lying on the top face 18 of the disc and are moved along with the disc during its rotation.
  • the tablets 4 encounter the arm 24 which is curved in the direction of rotation, and are gently pushed towards the rim of the disc.
  • the arm 24 is connected to a flexible member 28 which, by an increased load caused by a plurality of tab ⁇ lets engaging the arm, is bent still further and may let through a number of tablets which will accompany the disc another revolution.
  • the tablets 4 are fed by means of the arm 24 and the flexible member 28 through the slot 34 in the stationary inner sideboard 30 and out into the channel between the inner sideboard 30 and the outer sideboard 32.
  • This position is illustrated in Fig. 2, where the major part of a tablet 4 rests on the top face 20 of the circu ⁇ lar ring which, like the disc 16, rotates counterclockwise in the embodiment shown in Fig. 1.
  • the spacing between the tablets fed into the channel increases, and each tablet starts rotating because the speed of rotation v 1 of the disc is different from the speed of rotation v « of the circular ring.
  • the tablet is entrained and must bridge the gap 22 whose width increases continuously throughout about half the circumference to again decrease. This is illustrated in Figs 2-5.
  • Tablets whose edges have been damaged or which have an undersize diameter will thus drop through the gap. Local edge damage is discovered, since each tablet is caused to rotate about its own axis in the channel. Substandard tablets are thus sorted out. Concurrently with the rejection of damaged tablets, tab ⁇ let dust and fragments entering the device 2 in connection with the filling thereof are removed. Intact tablets having the desired diameter are dis ⁇ placed a full revolution in the channel, and are discharg ⁇ ed through the duct 36. With the inventive device, it is possible to meet very narrow tolerance requirements.
  • the inventive device is of a relatively simple design which also is highly cost-effective.
  • the maximum width of the gap can thus be varied by changing the eccentricity between the disc and the ring, or by changing the disc and/or the ring.
  • the width of the channel can be easily changed if the inner and the outer sideboard consist of a highly flexible mate- rial.
  • the exit end of the channel can also be designed otherwise.
  • the outer sideboard can be formed with a slot in the area of the channel end, whereby tab ⁇ lets, by a suitable design of the inner sideboard, can be gently pushed out through the slot on to e.g. a sloping plane or a conveyor.
  • the speed ratios and the rotational directions mentioned in the description merely serve as examples.
  • the ring may, for instance, rotate in the opposite direction with respect to the rotational direction of the disc. All such modifications as fall within the scope of the inventive concept should therefore be comprised by the claimed scope of protection.

Landscapes

  • Feeding Of Articles To Conveyors (AREA)

Abstract

L'invention se rapporte à un dispositif servant à trier des produits plats et circulaires dont la forme diffère d'une forme prédéterminée. Le dispositif se compose d'un canal incurvé délimité par une paroi latérale interne (30) et une paroi latérale externe (32). La paroi latérale interne (30) est placée juste au-dessus de la face supérieure (18) d'un disque rotatif (16) dont le rebord constitue une première partie du fond du canal. Un anneau (12) est placé de façon excentrée par rapport au disque (16) et tourne à une vitesse supérieure à celle du disque. La face supérieure (20) de l'anneau (12) se situe sur le même plan que la face supérieure (18) du disque (16). Le diamètre interne de l'anneau (12) est supérieur au diamètre externe du disque (16). La largeur d'un espace (22) entre l'anneau (12) et le disque (16) varie dans la direction périphérique et, au maximum, n'est que légèrement inférieure au diamètre du produit. La partie de la face supérieure (20) de l'anneau (12) qui est située à l'intérieur par rapport à la paroi latérale externe (32) constitue une seconde partie du fond du canal. Une fente (34) pratiquée dans la paroi latérale interne (30) présente une longueur et une hauteur qui permettent à un produit de passer sous la paroi latérale interne (30) et dans le canal.
PCT/SE1992/000340 1991-07-01 1992-05-21 Dispositif permettant de trier des produits en forme de disque WO1993001006A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9102028A SE467393B (sv) 1991-07-01 1991-07-01 Anordning foer sortering av runda, skivformiga produkter
SE9102028-9 1991-07-01

Publications (1)

Publication Number Publication Date
WO1993001006A1 true WO1993001006A1 (fr) 1993-01-21

Family

ID=20383203

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1992/000340 WO1993001006A1 (fr) 1991-07-01 1992-05-21 Dispositif permettant de trier des produits en forme de disque

Country Status (2)

Country Link
SE (1) SE467393B (fr)
WO (1) WO1993001006A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419442A (en) * 1994-01-24 1995-05-30 E. R. Squibb & Sons, Inc. Separating device for discriminating between defective and nondefective articles
US5583031A (en) * 1992-02-06 1996-12-10 President And Fellows Of Harvard College Empty major histocompatibility class II heterodimers
EP1070959A1 (fr) * 1999-07-23 2001-01-24 Shionogi Qualicaps Co., Ltd. Appareil pour l'inspection des surfaces laterales, appareil pour l'inspection des surfaces antérieures et postérieures, et appareil pour l'inspection de l'apparence de tablettes l'utilisant
EP1398087A1 (fr) * 2002-09-12 2004-03-17 UHLMANN PAC-SYSTEME GmbH & Co. KG Dispositif pour le tri de produits

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2125666A1 (de) * 1970-05-26 1971-12-23 Brassel E Vorrichtung zum Sortieren von tablettenförmigen Körpern
WO1989009098A1 (fr) * 1988-03-25 1989-10-05 Kabivitrum Ab Procede et appareil de triage d'objets ronds

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2125666A1 (de) * 1970-05-26 1971-12-23 Brassel E Vorrichtung zum Sortieren von tablettenförmigen Körpern
WO1989009098A1 (fr) * 1988-03-25 1989-10-05 Kabivitrum Ab Procede et appareil de triage d'objets ronds

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5583031A (en) * 1992-02-06 1996-12-10 President And Fellows Of Harvard College Empty major histocompatibility class II heterodimers
US5419442A (en) * 1994-01-24 1995-05-30 E. R. Squibb & Sons, Inc. Separating device for discriminating between defective and nondefective articles
EP0664164A3 (fr) * 1994-01-24 1995-10-18 Bristol Myers Squibb Co Dispositif pour séparer des articles défectueux et des articles non défectueux.
EP1070959A1 (fr) * 1999-07-23 2001-01-24 Shionogi Qualicaps Co., Ltd. Appareil pour l'inspection des surfaces laterales, appareil pour l'inspection des surfaces antérieures et postérieures, et appareil pour l'inspection de l'apparence de tablettes l'utilisant
US6741731B1 (en) 1999-07-23 2004-05-25 Shionogi Qualicaps Co., Ltd. Side surface inspecting apparatus for tablet, front and back surface inspecting apparatus for tablet, and tablet appearance inspecting apparatus using the same
EP1698889A1 (fr) * 1999-07-23 2006-09-06 Shionogi Qualicaps Co., Ltd. Appareil d'inspection de la surface frontale et arrière du comprimé et appareil d'inspection de l'apparence du comprimé utilisant ce même appareil
EP1398087A1 (fr) * 2002-09-12 2004-03-17 UHLMANN PAC-SYSTEME GmbH & Co. KG Dispositif pour le tri de produits
DE10242243A1 (de) * 2002-09-12 2004-03-25 Uhlmann Pac-Systeme Gmbh & Co. Kg Vorrichtung zum Sortieren von Produkten
DE10242243B4 (de) * 2002-09-12 2004-07-08 Uhlmann Pac-Systeme Gmbh & Co. Kg Vorrichtung zum Sortieren von Produkten
US7059479B2 (en) 2002-09-12 2006-06-13 Uhlmann Pac-Systeme Gmbh & Co. Kg Apparatus for sorting pills

Also Published As

Publication number Publication date
SE9102028L (sv) 1992-07-13
SE467393B (sv) 1992-07-13
SE9102028D0 (sv) 1991-07-01

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