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EP3840895B1 - Procédé d'élimination sélective des produits apte à ruisseler - Google Patents

Procédé d'élimination sélective des produits apte à ruisseler Download PDF

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Publication number
EP3840895B1
EP3840895B1 EP19766188.7A EP19766188A EP3840895B1 EP 3840895 B1 EP3840895 B1 EP 3840895B1 EP 19766188 A EP19766188 A EP 19766188A EP 3840895 B1 EP3840895 B1 EP 3840895B1
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EP
European Patent Office
Prior art keywords
suction
product
conveying
period
conveyor track
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.)
Active
Application number
EP19766188.7A
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German (de)
English (en)
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EP3840895A1 (fr
Inventor
Nils DICKFELD
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Individual
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Individual
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Publication of EP3840895A1 publication Critical patent/EP3840895A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B07C5/363—Sorting apparatus characterised by the means used for distribution by means of air

Definitions

  • the invention relates to a method for selectively separating out free-flowing products that are conveyed in a conveying direction along a conveying path in a conveying path, the conveyed products being checked in a control section of the conveying path using a checking device, and being in a sorting section arranged downstream along the conveying path the product that does not meet a predeterminable control criterion is separated from the conveyor track with a suction device and discharged by arranging the suction device on the conveyor section and generating a suction stream flowing away from the conveyor track for a predefined suction duration in order to suck the product out of the conveyor track.
  • suitable methods are used to selectively separate out and remove those products from the conveyor line that do not meet a predetermined control criterion.
  • the individual products can be recorded with a camera and checked for optical deviations from a specified appearance. It is also conceivable that the weight of the individual products is checked with the control device.
  • a suction pipe is usually brought directly above or next to the conveyor track to the product to be sorted out and a suction flow flowing away from the conveyor track is generated for a predetermined suction duration, with which the product is sucked out of the conveyor track.
  • the extracted product can be fed through the suction pipe to a storage container for rejected products.
  • sucking off the product with a suction device prevents the separated products or, for example, their abrasion or impurities from being blown out of the conveyor track in a more or less uncontrollable manner will.
  • a suction device is, for example, in EP 2 774 693 A shown and described.
  • the suction device In order to be able to reliably suck off the product to be separated out from the conveyor track, the suction device is regularly operated for a predetermined suction duration, which is sufficient to be able to reliably suck off the product to be separated out out of the conveyor track.
  • a second product following the product to be sorted out is attracted by the suction flow generated and sucked off by the suction device and accelerated in the direction of the suction device, so that the distance between the following second product increases the preceding first product to be discarded is reduced.
  • the distance between the following second product and the preceding first product is too small even before the start of the suction period, or due to an acceleration exerted on the following second product during the suction period, it is so small towards the end of the suction process that the second product is also sucked off or is pulled out of the conveyor track by the suction device and no longer reliably falls back into the conveyor track after the end of the suction period. If the distance between the following second product and the preceding first product is too small or if the second product is accelerated due to the suction process of the first product, there is often not enough time to start the second suction process in good time after the end of the first sowing process , in order to still be able to reliably suck off the following second product.
  • the suction duration would often have to be specified so short that the first product to be separated out can no longer be reliably sucked off.
  • This object is achieved according to the invention in that the control device checks whether a product to be separated out is followed by a second product that also does not meet the specified control criterion and therefore also has to be separated out, and that the suction time is extended by a specifiable extension period in order to continue without interruption suck off the following second product from the conveyor track.
  • a second product that is also to be separated out is also reliably suctioned off without the suction process having to be interrupted in the meantime and restarted. It has been shown that with uninterrupted suction, a subsequent product that is also to be sorted out can be suctioned off much more reliably and at the same time the suction duration is increased the suction of the second product can be ended earlier in order to influence a subsequent product that is no longer to be sorted out as little as possible and to impair its transport along the conveyor line as little as possible.
  • the method according to the invention can be used particularly advantageously in the case of a conveyor track designed in the form of a groove.
  • the suction duration during which a first product to be separated out is sucked off, as short as possible with regard to a subsequent second product that is also to be separated out, in order to reliably continue the suction process for the first product after the suction process has ended finish and then start again in order to be able to reliably suck off the second product as well.
  • the lengthening of the suction process ensures that the following second product is sucked off early and reliably even in the event of an acceleration generated during the suction of the first product in the direction of the suction device.
  • the lengthening period can be specified in such a way that the subsequent second product is also reliably sucked off the conveyor track undesired influencing of a subsequent third product which is no longer to be separated out is as small as possible.
  • the lengthening period is shorter than the suction period. It has been shown that in most cases, and especially with short distances between the products conveyed one after the other along the conveyor line, a subsequent second product is already accelerated by the suction process of the first product and its distance from the first product is reduced, so that with an extension of the suction duration, the accelerated second product is caught earlier by the suction flow and sucked off with the suction device.
  • the lengthening time can be significantly shorter than the suction time and can be, for example, less than 80% or even less than 50% of the suction time.
  • one embodiment of the inventive idea can provide for the suction device to be displaced in the conveying direction along the conveying path during the suction period and/or during the extension period.
  • control device determines a distance between the following second product and the first product along the conveying path and for the lengthening period to be adjusted as a function of the distance determined. In this way, distances of different sizes between the first product to be sucked off and the subsequent second product can be taken into account when specifying the lengthening period. With a greater distance, a somewhat longer extension time is specified, while with a smaller distance, a shorter extension time is sufficient to reliably suck off the subsequent second product from the conveyor track.
  • control device is arranged in the immediate vicinity of the suction device and that the control device is used to determine a conveying speed of the products conveyed along the conveying path. If the subsequent second product has an increased conveying speed, the lengthening period can also be preset to be shorter than for a subsequent second product whose conveying speed has not yet been increased by the suction flow during the suctioning of the first product.
  • the Suction device has a suction seal adapted to a cross-sectional area of the conveying track, which during the suction period is displaced into the conveying track at an end of the suction device lying in the conveying direction in order to reduce suction of the suction flow from a section of the conveying track lying in the conveying direction. If the suction device, which usually has a suction pipe ending directly above the conveyor track, is brought up close to the conveyor track during the suction period or is already there, the suction flow sucked off by the suction device is predominantly sucked out of the sections of the conveyor track that are adjacent in both directions.
  • the product to be sucked off is still ahead of the suction device in the conveying direction when the suction process begins.
  • the suction power acting on the product that is still located in a preceding section of the conveyor track is reduced.
  • the suction flow must either be sucked in with a sufficiently high suction power and sucked away from the conveyor track through the suction pipe, or a sufficiently long suction duration must be specified in order to be able to reliably suck in the product and remove it through the suction device .
  • the entire suction stream must be sucked in from the preceding section of the conveyor track, in which the product to be sucked off is located, so that the suction effect is increased on the product during the suction process and the product can be sucked off with a lower suction power of the suction device or with a shorter suction time.
  • the suction seal can, for example, be elastic or flexible and be arranged rigidly on the suction device if, according to an optional embodiment of the inventive concept, the suction device is shifted towards the conveyor track during the suction period and is then moved away from the conveyor track again.
  • the suction seal consists of a dimensionally stable material and is adapted to a shape of the conveyor track in an end area facing the conveyor track, so that the end area of the suction seal can be displaced into the conveyor track in order to form a mechanical barrier that sealingly separates the section of the conveyor track that follows in the conveying direction and also prevents undesired further conveyance of individual products or individual products from slipping down after a conveyor movement of the conveyor track has been switched off.
  • the suction device can have a substantially constant distance from the conveyor track both during a suction process and before and after, and only the suction seal can be displaced during a suction process and arranged so as to protrude into the conveyor track.
  • the suction seal can be inserted into the conveyor track together with the suction device or separately from it, for example pneumatically or with magnetic force and optionally supported by a spring device in and then shifted out of the conveyor track.
  • Other actuators or displacement devices are also conceivable in order to displace the suction seal into the conveyor track if necessary and then to displace it out of the conveyor track again.
  • FIG. 1 and 2 is a schematic and exemplary representation of a conveying section 1 for conveying free-flowing products 2, 2', 2" such as tablets or capsules in a conveying direction indicated by an arrow 3.
  • the individual products 2, 2', 2" are spaced apart each other in a groove-shaped conveyor track 4.
  • In the conveyor track 4 is It is a vibrating conveyor in which the products 2, 2', 2" located in the conveyor track 4 are thrown forward in the conveying direction 3 by a directed vibration movement of the conveyor track 4 and are thereby displaced and conveyed in the conveying direction 3.
  • a control device 6 is arranged in a control section 5 of the conveyor section 1, with which the products 2, 2', 2" conveyed past the control device 6 can be checked. If a product 2 conveyed past the control device 6 does not meet a specifiable control criterion, activated during the conveyance of the product 2 in question by a suction device 8 arranged in a subsequent separation section 7 in order to suck off the product 2 then located in the separation section 7 from the conveyor track 4.
  • the suction device 8 has a a suction pipe 10 having a suction opening 9 facing the conveyor track 4.
  • a suitable vacuum generating device can generate a negative pressure in the suction pipe 10, so that during the operation of the suction device 8 a suction flow is sucked in in the vicinity of the suction opening 9 and discharged through the suction pipe 10 ugt will.
  • the product 2 to be sorted out is in the detection area of the suction flow generated by the suction device 8 and a sufficiently large suction effect is exerted on the product 2, the product is pushed through the suction opening 9 into the suction tube 10 and through the suction tube 10 to a product that is no longer shown Storage container for discarded products 2 sucked.
  • the suction device 8 can be activated after a predetermined activation period, which depends on the conveying speed of the in the conveying direction 3 in the Conveyor track 4 moving products 2, 2 ', 2 "and a distance between the control device 6 and the sorting section 7 along the conveyor line 1 depends. It is also conceivable that the entry of a product 2 into the separation section 7 is detected, for example, with the aid of a light barrier or another suitable detector device, and the suction device 8 is activated immediately thereafter.
  • suction device 8 After the suction device has been activated, suction device 8 generates a vacuum for a specified suction duration and generates a suction flow that flows away from conveyor track 4 through suction pipe 10, with which product 2 located in sorting section 7 is suctioned off through suction pipe 10. The suction device is then deactivated again after the specified suction time has elapsed.
  • the duration of the suction can also be specified differently and controlled or regulated. It is also possible to change the conveying speed of the products 2, 2', 2'' accordingly instead of changing the suction duration.
  • a product 2' following the preceding first product 2 to be separated out is checked with the control device 6 and it is determined whether the following second Product 2' also does not meet the specified control criterion and should therefore also be discarded, or whether the following second product 2' should be conveyed further along the conveying direction 3 in the conveying track 4. If the following second product 2' is also to be sorted out, the suction device 8 is not deactivated after the suction time has elapsed, but continues to be operated for a predetermined extension time in order to suck off the suction flow through the suction pipe 10 without interruption until the second product 2' to be sorted out is also is sucked out of the conveyor track 4 during the extension period. After the extension period has expired, the suction device 8 is then deactivated.
  • control device 6 also controls a third product 2" following the second product 2' and, if necessary, the suction device 8 is operated for a further extension period in order to also suck off the third product 2" that follows. This can be continued in the same way as desired until a subsequent product 2 satisfies the control criterion and is no longer to be sucked off, but to be conveyed on.
  • a sucked through the suction opening 9 suction stream is mainly sucked out of the conveyor track 4. It is achieved by an aligned in the conveying direction 3 arrangement of the suction pipe 10 and a suction opening 9 adapted thereto, that a larger proportion of the suction flow sucked in from a Area 11 of the conveyor track 4 preceding the conveying direction 3 is sucked in, while a comparatively smaller proportion of the suction flow is sucked in from a region 12 of the conveyor track 4 following in the conveying direction 3 .
  • the suction device 8 has a suction seal 13 which can be displaced into the groove-shaped conveyor track 4 and consists of a suitable elastomer material.
  • the suction seal 13 is moved into the groove-shaped conveyor track 4 at the same time and over the entire suction period and any subsequent extension period and forms a seal for the subsequent area 12 of the conveyor track 4 by the suction stream, which then has to be sucked in predominantly from the preceding area 11 of the conveyor track 4, in which the product 2, 2' to be sucked off is located.
  • the suction power acting on the product 2, 2' to be sucked off is increased and the product 2, 2' to be sucked off can be reliably sucked off with a lower suction flow generated by the vacuum generating device.
  • the suction seal 13 forms a barrier that reliably prevents a product 2, 2' to be sucked off from being unintentionally in the conveyor track 4 passes the suction device 8 into the following area 12 of the conveyor track 4 and may no longer be able to be sucked off.

Landscapes

  • Attitude Control For Articles On Conveyors (AREA)

Claims (6)

  1. Procédé de séparation sélective de produits aptes à l'écoulement (2, 2', 2"), qui sont transportés dans une direction de transport (3) le long d'une ligne de transport (1) dans une voie de transport (4), les produits transportés (2, 2', 2") étant vérifiés dans une section de contrôle (5) de la ligne de transport (1) avec un appareil de contrôle (6) et, dans une section de séparation (7) agencée en aval le long de la ligne de transport (1), le produit (2, 2') qui ne satisfait pas à un critère de contrôle prédéfinissable, étant séparé et évacué de la voie de transport (4) avec un dispositif d'aspiration (8), par le fait que le dispositif d'aspiration (8) est agencé sur la ligne de transport (1) et un courant d'aspiration s'éloignant de la voie de transport (4) est produit pendant une durée d'aspiration prédéfinie afin d'aspirer le produit (2, 2') hors de la voie de transport (4), caractérisé en ce que l'appareil de contrôle (5) vérifie si le premier produit (2) à séparer est suivi d'un deuxième produit (2') qui ne remplit pas non plus le critère de contrôle prédéfini et doit donc également être séparé, et en ce que la durée d'aspiration est prolongée d'une durée de prolongation prédéfinissable afin d'aspirer également sans interruption le deuxième produit (2') suivant hors de la voie de transport (4).
  2. Procédé selon la revendication 1, caractérisé en ce que la durée de prolongation est plus courte que la durée d'aspiration.
  3. Procédé selon la revendication 1 ou la revendication 2, caractérisé en ce que le dispositif d'aspiration (8) est déplacé dans la direction de transport (3) le long de la ligne de transport (1) pendant la durée d'aspiration et/ou la durée de prolongation.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'appareil de contrôle (5) détermine une distance entre le deuxième produit suivant (2') et le premier produit (2) le long de la ligne de transport (1), et en ce que la durée de prolongation est adaptée en fonction de la distance déterminée.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'aspiration (8) présente un joint d'aspiration (13) adapté à une surface de section transversale de la voie de transport (4), qui est déplacé dans la voie de transport (4) pendant la durée d'aspiration à une extrémité du dispositif d'aspiration (8) située dans la direction de transport (3), afin de réduire une aspiration du courant d'aspiration à partir d'une section de la voie de transport (4) située en aval dans la direction de transport (3).
  6. Procédé selon la revendication 5, caractérisé en ce que le dispositif d'aspiration (8) est déplacé vers la voie de transport (4) pendant la durée d'aspiration en direction de la voie de transport (4).
EP19766188.7A 2018-08-24 2019-08-23 Procédé d'élimination sélective des produits apte à ruisseler Active EP3840895B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018120722.0A DE102018120722A1 (de) 2018-08-24 2018-08-24 Verfahren zum selektiven Aussondern von rieselfähigen Produkten
PCT/EP2019/072635 WO2020039089A1 (fr) 2018-08-24 2019-08-23 Procédé de mise au rebut sélective de produits coulants

Publications (2)

Publication Number Publication Date
EP3840895A1 EP3840895A1 (fr) 2021-06-30
EP3840895B1 true EP3840895B1 (fr) 2022-08-03

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Application Number Title Priority Date Filing Date
EP19766188.7A Active EP3840895B1 (fr) 2018-08-24 2019-08-23 Procédé d'élimination sélective des produits apte à ruisseler

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EP (1) EP3840895B1 (fr)
DE (1) DE102018120722A1 (fr)
WO (1) WO2020039089A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022205283A1 (de) 2022-05-25 2023-11-30 OPTIMA pharma GmbH Zuführvorrichtung und Verfahren zum Zuführen von Kleinteilen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61191944A (ja) * 1985-02-20 1986-08-26 Kanebo Ltd 粉粒体検査装置
JPS63119887A (ja) * 1986-11-06 1988-05-24 カネボウ株式会社 選別装置
JP2603038Y2 (ja) * 1992-03-10 2000-02-14 鐘紡株式会社 粉粒体検査装置
DE102004017595A1 (de) * 2004-04-07 2005-11-10 Hauni Maschinenbau Ag Verfahren und Vorrichtung zur Fremdkörperabscheidung aus einem Materialstrom
DE102005004751A1 (de) * 2005-01-28 2006-08-03 Nordischer Maschinenbau Rud. Baader Gmbh + Co Kg Vorrichtung und Verfahren zum gewichtskontrollierten Zusammenstellen von Produkten zu einem Los
US20140250835A1 (en) * 2013-03-05 2014-09-11 Howmedica Osteonics Corp. Process for removing contaminants from polymeric powders
JP6275911B1 (ja) * 2017-10-02 2018-02-07 株式会社服部製作所 色彩選別機

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Publication number Publication date
EP3840895A1 (fr) 2021-06-30
DE102018120722A1 (de) 2020-02-27
WO2020039089A1 (fr) 2020-02-27

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