EP2740671A1 - Dispositif de contrôle de tablettes - Google Patents

Dispositif de contrôle de tablettes Download PDF

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Publication number
EP2740671A1
EP2740671A1 EP12196297.1A EP12196297A EP2740671A1 EP 2740671 A1 EP2740671 A1 EP 2740671A1 EP 12196297 A EP12196297 A EP 12196297A EP 2740671 A1 EP2740671 A1 EP 2740671A1
Authority
EP
European Patent Office
Prior art keywords
bending transducer
product
product guide
piezoelectric bending
passive piezoelectric
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.)
Granted
Application number
EP12196297.1A
Other languages
German (de)
English (en)
Other versions
EP2740671B1 (fr
Inventor
Detlev Gertitschke
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.)
Uhlmann Pac Systeme GmbH and Co KG
Original Assignee
Uhlmann Pac Systeme GmbH and Co KG
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 Uhlmann Pac Systeme GmbH and Co KG filed Critical Uhlmann Pac Systeme GmbH and Co KG
Priority to EP20120196297 priority Critical patent/EP2740671B1/fr
Publication of EP2740671A1 publication Critical patent/EP2740671A1/fr
Application granted granted Critical
Publication of EP2740671B1 publication Critical patent/EP2740671B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/14—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of articles or material to be packaged
    • 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
    • B07C5/04—Sorting according to size
    • B07C5/08—Sorting according to size measured electrically or electronically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B5/00—Packaging individual articles in containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, jars
    • B65B5/10—Filling containers or receptacles progressively or in stages by introducing successive articles, or layers of articles
    • B65B5/101—Filling containers or receptacles progressively or in stages by introducing successive articles, or layers of articles by gravity
    • B65B5/103—Filling containers or receptacles progressively or in stages by introducing successive articles, or layers of articles by gravity for packaging pills or tablets
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/08—Design features of general application for actuating the drive
    • G06M1/10—Design features of general application for actuating the drive by electric or magnetic means
    • G06M1/108—Design features of general application for actuating the drive by electric or magnetic means by electronic means

Definitions

  • the present invention relates to a device for checking small pharmaceutical products such as tablets or capsules.
  • Color cameras can detect incorrectly colored or broken tablets or capsules with appropriate image analysis. For this purpose, however, a highly complex evaluation software is required due to the continuous movement of the passing tablets or capsules. In addition, a high illumination cost is necessary to achieve sufficiently sharp image content.
  • Capacitive sensors can be used to contactlessly calculate the mass of the tablets or capsules passed by and to draw conclusions about the integrity of the tablets or capsules. Such capacitive sensors may also be integrated into a product chute, such as for example US 2009/0090659 A1 is known. However, capacitive sensors are sensitive to vibrations, electrical noise and the moisture content of the tablets or capsules, as well as positional deviations of the products when passing through the sensor area.
  • the present invention has for its object to provide a device for checking tablets, which is very robust, simple and can be applied to different product types and formats.
  • the device for checking tablets comprises a product chute having a product guide surface inclined at an angle to the horizontal and a sensor integrated in the product chute for detecting defective tablets during their passage through the product chute.
  • the product chute on at least a first, stationary product guide portion and a separated, movably mounted second product guide portion, which in series together define the product guide surface.
  • the sensor has a passive piezoelectric bending transducer, which is connected to the second product guide section, wherein the passive piezoelectric bending transducer is connected to a measuring device which measures at least one voltage pulse generated by the passive piezoelectric bending transducer in bending the passive piezoelectric bending transducer.
  • the guide surface portion of the second product guide portion has the same shape as the guide surface portion of the first product guide portion. In this way it is ensured that the movement of the tablets is not affected during the transition from the first to the second product guide section.
  • Particularly suitable here is a U-shape or V-shape of the guide surface sections, whereby a stable central position of the tablets is ensured when passing through the product chute and thus also during the measurement.
  • the passive piezoelectric bending transducer is plate-shaped and arranged substantially at the same angle to the horizontal as the product guide surface.
  • the conditions for a high reactivity of the piezoelectric bending transducer are optimized when the bending transducer is connected in the region of its front end portion with the second product guide portion and is immovably mounted in the region of its rear end portion.
  • the first stationary product guide portion of the product chute is connected to a stationary support frame of the product chute and the passive one Piezoelectric bending transducer is clamped in the region of its rear end portion in a support foot provided in addition to the support frame. In this way, a structurally simple integration of the sensor in the product chute is possible.
  • the support leg on two side cheeks defining a gap between them, wherein the side cheeks have on the mutually facing inner surfaces at least one recess for receiving a side surface of the passive piezoelectric bending transducer.
  • the at least one recess has, in a rear end region, an essentially V-shaped clamping surface which is open towards the intermediate space.
  • the support foot is preferably supported with the interposition of at least one vibration-damping element on a bottom plate of the stationary support frame of the product chute.
  • the measuring device is preferably designed to measure the bending of the passive piezoelectric bending transducer, the amplitude of the at least one voltage pulse generated by the passive piezoelectric bending transducer. With this characteristic it is easy to identify mass differences between whole and broken tablets.
  • the device also has an evaluation unit which is designed to compare the measured values supplied by the measuring device with stored desired values.
  • a sorting device is preferably provided which is designed to separate good and bad tablets on the basis of the comparison result of the evaluation unit.
  • the piezoelectric bending transducer is a trimeric piezoceramic bending transducer.
  • tablette is to be understood to encompass any type of small pharmaceutical product such as tablets, dragees, oblongs, capsules, and the like.
  • Fig. 1 . 2 . 4 and 5 an embodiment of the device according to the invention for checking tablets is shown in different views.
  • the device according to the invention for checking tablets is preceded by a transport device 2 for tablets.
  • This can, as in the illustrated embodiment, for example, be configured as a vibratory conveyor with one or more webs, but may also be a feed tube or other commercially available tablet feed.
  • the device for checking tablets comprises a product chute 4 which has a product guide surface 6 on which the tablets 8 slide along.
  • the product guide surface 6 is inclined for this purpose at an angle ⁇ to the horizontal.
  • the angle ⁇ and the length of the product chute 4 are adapted to the respective prevailing conditions, for example, the manner and speed with which the tablets 8 are supplied to the product chute 4, the degree of singulation of the tablets 8 and the shape and size of the Tablets 8. In most applications, an angle ⁇ of 20 ° to 40 °, preferably 25 ° to 35 °, is advantageous.
  • the product chute 4 has at least one first stationary product guide section 10 and a second product guide section 12 separated therefrom and movably mounted, which together define the product guide surface 6 in a row.
  • a first product guide portion 10 is present, which is significantly longer than the second product guide portion 12.
  • the second product guide portion 12 should in any case be so short that only one tablet 8 at a predetermined time on this second product guide portion 12 slides at the same time, the second product guide section 12 should be at least as long as the largest tablet 8 to be measured.
  • the first product guide portion 10 has a first guide surface portion 14 (surface) on which the tablets 8 slide along.
  • this guide surface portion 14 formed with the contour or shape of a U-groove or V-groove to exert a centering effect on the tablets 8.
  • the second product guide section 12 arranged at the end of the first product guide section 10 has a second guide surface section 16 (surface), which preferably has the same contour or shape as the first guide surface section 14. In this way, the tablets 8 can move freely from the first product guide section 10 to the second Slide product guide section 12 without their trajectory is changed.
  • the distance a between the two product guide sections 10, 12 should be as small as possible, but must leave enough space in the illustrated preferred embodiment for an unobstructed arcuate lowering of the second product guide section 12, as will be described in more detail below.
  • the product chute 4 comprises only one product guide surface 6, but it may also be several product guide surfaces 6 (a plurality of juxtaposed grooves) may be provided in the product chute 4.
  • first product guide section 10 In the illustrated embodiment, only a first product guide section 10 is shown. It is also possible to provide a plurality of stationary, first product guide sections 10 which, for example, enclose the movable second product guide section 12 between them.
  • the stationary first product guide section 10 is connected to a stationary support frame 18 of the product chute 4.
  • the support frame 18 is configured as a stand frame with a pillar 20 and a bottom plate 22. It is also possible that the support frame 18 has laterally projecting support arms or any other construction of a stationary attachment to any machine frame.
  • the second product guide section 12 is already part of a sensor integrated in the product chute 4 for detecting defective tablets during their passage through the product chute 4.
  • the sensor has a passive piezoelectric bending transducer 24, which is connected to the second product guide section 12.
  • the passive piezoelectric bending transducer 24 is bent, at least one voltage pulse is generated by the bending transducer 24, as will be described in more detail below.
  • the passive piezoelectric bending transducer 24 is connected to a measuring device 26, which is preferably aligned thereon is to measure the amplitude of the voltage pulse generated by the passive piezoelectric bending transducer 24.
  • the measured values supplied by the measuring device 26 are preferably forwarded to an evaluation unit 28, which compares the measured values with stored nominal values in order to check the integrity of the tablets 8.
  • These set values are usually recorded by a calibration process for each type of tablet before the start of the respective filling process on the basis of individual, classified as well 8 tablets.
  • a tolerance threshold is usually provided, which is adjustable by the operator in an individual case.
  • a sorting device 30 good and bad tablets 8 before their storage in the respective container (vials, blister cup, etc.) to separate.
  • the sorting device 30 may be designed as a mechanical switch or as a blow-out device, which adjoins the product chute 4 below.
  • Piezoelectric bending transducers 24 typically operate by being energized and bending in response. In the context of the present invention, this basic principle is reversed by the electrical signal generated by mechanical bending of the bending transducer 24 is received by the measuring device 26. The height of the electrical signal is an indicator of the strength of the initial deflection of the bending transducer 24. In the context of the present invention, this is used for the indirect weight determination of tablets 8. When a tablet 8 slides over the second product guide section 12, the bending transducer 24 is tilted by an angle ⁇ due to the weight of the tablet 8 (FIG. Fig. 2 ), wherein the electrical signal generated by the bending transducer 24 is substantially proportional to the deflection ⁇ .
  • the passive piezoelectric bending transducer 24 is plate-shaped and arranged at substantially the same angle ⁇ to the horizontal as the product guide surface 6.
  • the passive piezoelectric bending transducer 24 is then connected in the region of its front end portion with the second product guide portion 12 and in Stored immobile area of its rear end portion. In this way, it is ensured that a maximum deflection of the front end portion of the bending transducer 24 in response to the weight of a tablet 8 is achieved.
  • the bending transducer 24 is preferably glued in the region of its front end portion with the second product guide portion 12 or, as shown in the figures, clamped by means of a clamping element 32 (see in particular Fig. 3 ).
  • the adjustment of the mass of the second product guide section 12 or the combination of the second product guide section 12 and clamping element 32 is important for the damping behavior of the bending transducer 24.
  • a configuration is desired in which the bending transducer 24 reverberates as little as possible, so that the sensor in very a short time to measure the next tablet 8 ready.
  • the rear end portion of the bending transducer 24 may be connected to the stationary support frame 18 of the product chute 4 and secured there.
  • This support leg 34 may have at least one vibration-damping element 36 on its underside, which ensures a decoupling of the sensor from mechanical vibrations of the environment.
  • the support leg 34 is supported with the interposition of the vibration damping elements 36 on the bottom plate 22 of the support frame 18 of the product chute 4.
  • FIG. 6 shows one of two side walls 38 of the support leg 34, which define a gap between them.
  • the side walls 38 on the mutually facing inner surfaces at least one recess 40 for receiving a side surface of the passive piezoelectric bending transducer 24.
  • the recesses 40 are dimensioned such that sufficient clearance for deflection / deflection of the front end portion of the bending transducer 24 remains.
  • substantially V-shaped clamping surface 42 for attachment of the rear end portion of the bending transducer 24 is in the recess 40 in a rear end region an open towards the gap, substantially V-shaped clamping surface 42 (see in particular Fig. 7 ) intended. In this way, the rear end portion of the bending transducer 24 is securely clamped between the two side cheeks 38 of the support leg 34.
  • the bending transducer 24 is configured in a preferred embodiment as a trimeric piezoceramic bending transducer, but other suitable bending transducers can be used.
  • a further piezoelectric bending transducer 46 is provided in the illustrated embodiment, which is disposed below the first piezoelectric bending transducer 24 and at its front end portion has a counterweight 48 which is identical to the mass occupancy of the front End portion of the first bending transducer 24, in the present example, therefore, the weight of the combination of the second product guide section 12 and clamping element 32 corresponds.
  • the evaluation of the signal of the second bending transducer 46 takes place with the opposite sign in comparison to the first bending transducer 24, so that vibrations from the environment generate signals in the first bending transducer 24 and in the second bending transducer 46, which cancel each other out.
  • the second bending transducer 46 is mounted completely identical to the first bending transducer 24.
  • FIG. 2 shows an exemplary signal of a non-broken tablet 8 to be classified as good, as determined by the measuring device 26.
  • Fig. 9 a corresponding waveform of a tablet section.
  • the evaluation of the signal is preferably carried out on the amplitude of the primary rash, but can also be done on the integral of the Clearausschlags. As previously explained, it is important that ringing of the flexural transducer 24 be minimized. In the illustrated embodiment, the sensor is already ready for measuring the next tablet 8 after about 10 ms.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Sorting Of Articles (AREA)
EP20120196297 2012-12-10 2012-12-10 Dispositif de contrôle de tablettes Not-in-force EP2740671B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20120196297 EP2740671B1 (fr) 2012-12-10 2012-12-10 Dispositif de contrôle de tablettes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20120196297 EP2740671B1 (fr) 2012-12-10 2012-12-10 Dispositif de contrôle de tablettes

Publications (2)

Publication Number Publication Date
EP2740671A1 true EP2740671A1 (fr) 2014-06-11
EP2740671B1 EP2740671B1 (fr) 2015-03-25

Family

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Application Number Title Priority Date Filing Date
EP20120196297 Not-in-force EP2740671B1 (fr) 2012-12-10 2012-12-10 Dispositif de contrôle de tablettes

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EP (1) EP2740671B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170334584A1 (en) * 2014-12-15 2017-11-23 Cretem Co., Ltd. Drug packaging unit and drug transfer method for same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023247572A1 (fr) 2022-06-20 2023-12-28 Hovione Scientia Ltd Procédé et dispositif de détermination de l'épaisseur et de la fraction solide d'un comprimé pharmaceutique à l'aide de tomographie électrique, processus non invasif

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1616793A1 (fr) * 2003-03-20 2006-01-18 Ricoh Company, Ltd. Dispositif et procede d'alimentation en poudre
WO2007146445A2 (fr) * 2006-06-14 2007-12-21 Searete Llc Sélection et conditionnement d'agents pharmaceutiques individualisés
US20090090659A1 (en) 2007-10-08 2009-04-09 Marchesini Group S.P.A. Method For Counting And Validating Articles, In Particular Pharmaceutical Articles, And An Apparatus For Actuating The Method
US20090255948A1 (en) * 2008-04-14 2009-10-15 Loris Bassani Container filling machine having vibration trays

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1616793A1 (fr) * 2003-03-20 2006-01-18 Ricoh Company, Ltd. Dispositif et procede d'alimentation en poudre
WO2007146445A2 (fr) * 2006-06-14 2007-12-21 Searete Llc Sélection et conditionnement d'agents pharmaceutiques individualisés
US20090090659A1 (en) 2007-10-08 2009-04-09 Marchesini Group S.P.A. Method For Counting And Validating Articles, In Particular Pharmaceutical Articles, And An Apparatus For Actuating The Method
US20090255948A1 (en) * 2008-04-14 2009-10-15 Loris Bassani Container filling machine having vibration trays

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170334584A1 (en) * 2014-12-15 2017-11-23 Cretem Co., Ltd. Drug packaging unit and drug transfer method for same
US10843823B2 (en) * 2014-12-15 2020-11-24 Cretem (Co)., Ltd. Drug packaging unit and drug transfer method for same

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Publication number Publication date
EP2740671B1 (fr) 2015-03-25

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