IT9048508A1

IT9048508A1 - DEVICE FOR OBTAINING A CARTON FROM A TUBULAR DIE CUT IN A FLAT CONFIGURATION.

Info

Publication number: IT9048508A1
Application number: IT048508A
Authority: IT
Inventors: Carlo Veronesi
Original assignee: Ve Ga Pack S R L
Priority date: 1990-11-23
Filing date: 1990-11-23
Publication date: 1992-05-24
Also published as: IT1246333B; IT9048508A0

Description

DISPOSITIVO PER L'OTTENIMENTO DI UN ASTUCCIO DA UN FUSTELLATO TUBOLARE IN CONFORMAZIONE APPIATTITA. DEVICE FOR OBTAINING A CASE FROM A TUBULAR BLANK IN FLAT CONFORMATION.

La presente invenzione concerne un dispositivo che, montato su una macchina automatica per il confezionamento di articoli in astucci, preleva ad uno ad uno dei fustellati tubolari in conformazione appiattita, collocati in un magazzino, e li trasforma in astucci, depositandoli infine su una linea di alimentazione astucci. Sono noti vari tipi di dispositivi per l'ottenimento degli astucci dai fustellati, operanti secondo tecniche diverse, ben note ai tecnici del settore. Un dispositivo noto, di questo genere, comprende, ad esempio, una lama movimentata in modo da potersi introdurre nel fustellato, ancora in conformazione appiattita, ed attuarne l'apertura in cooperazione con altri organi e riscontri previsti lungo la traiettoria del fustellato, ad ottenimento dell'astuccio. The present invention relates to a device which, mounted on an automatic machine for packaging items in cartons, takes one by one of the tubular blanks in a flattened conformation, placed in a warehouse, and transforms them into cartons, finally depositing them on a line of carton feeding. Various types of devices are known for obtaining cartons from blanks, operating according to different techniques, well known to those skilled in the art. A known device of this kind comprises, for example, a blade which is moved in such a way as to be able to introduce itself into the blank, still in a flattened conformation, and to open it in cooperation with other members and abutments provided along the trajectory of the blank, to obtain of the case.

Gli astucci così ottenuti, vengono quindi trasportati da opportuni mezzi di trasferimento, azionati a passo lungo la linea di confezionamento, fino ad una successiva stazione nella quale gli articoli da confezionare vengono in essi introdotti. The cartons thus obtained are then transported by suitable transfer means, driven in steps along the packaging line, to a subsequent station in which the articles to be packaged are introduced into them.

In tutte le apparecchiature di questo genere, si presenta la necessità di mantenere gli astucci nella corretta configurazione di apertura, nella quale rimane definita la prevista sezione per l'introduzione degli articoli . In all apparatuses of this kind, there is a need to keep the cartons in the correct opening configuration, in which the foreseen section for the introduction of the articles remains defined.

Infatti gli astucci hanno dimensioni di poco superiori a quelle degli articoli da confezionare, allo scopo di limitare al massimo l'ingombro esterno delle confezioni. Pertanto, soprattutto nelle macchine che operano ad alta velocità, sono previsti, sui mezzi di trasferimento degli astucci, organi atti a trattenere questi ultimi nella corretta configurazione, trascinandoli nello stesso tempo verso la stazione di confezionamento. In fact, the cartons have dimensions slightly greater than those of the articles to be packaged, in order to limit the external bulk of the packs as much as possible. Therefore, especially in machines that operate at high speed, on the means for transferring the cartons, members are provided for retaining the latter in the correct configuration, dragging them at the same time towards the packaging station.

Ad esempio, i mezzi di trasferimento possono comprendere una serie di doppie coppie di rebbi articolati a due catene chiuse ad anello e parallele tra loro. For example, the transfer means can comprise a series of double pairs of tines articulated with two chains closed in a ring and parallel to each other.

Le catene sono poi motorizzate per fare muovere i gruppi di rebbi con gli astucci tra di essi inseriti. The chains are then motorized to make the groups of prongs move with the cases inserted between them.

Lo scopo della presente invenzione è quello di realizzare un dispositivo che dopo aver prelevato un fustellato tubolare in configurazione appiattita da un magazzino lo apra, in modo da ottenerne il corrispondente astuccio, e lo depositi, nella corretta configurazione, sulla linea di trasferimento alla stazione di confezionamento. The purpose of the present invention is to provide a device which, after having taken a tubular blank in a flattened configuration from a magazine, opens it, so as to obtain the corresponding case, and deposits it, in the correct configuration, on the transfer line to the transfer station. packaging.

Altro scopo dell'invenzione è quello di proporre un dispositivo di sicura funzionalità ed elevata affidabilità . Another object of the invention is to propose a device of safe functionality and high reliability.

Gli scopi di cui sopra vengono ottenuti mediante un dispositivo sostanzialmente realizzato secondo quanto descritto nella rivendicazione 1. The above objects are achieved by means of a device substantially made according to what is described in claim 1.

Le caratteristiche dell'invenzione/ <'>non emergenti da quanto appena detto, sono evidenziate nel seguito, con particolare riferimento alle unite tavole di disegno, nelle quali: The characteristics of the invention / <'> not emerging from what has just been said, are highlighted below, with particular reference to the attached drawing tables, in which:

- la fig. 1 illustra schematicamente il dispositivo oggetto dell'invenzione con le sue parti operative posizionate rispettivamente secondo le successive fasi del suo funzionamento; - fig. 1 schematically illustrates the device object of the invention with its operating parts positioned respectively according to the subsequent phases of its operation;

- la fig. 2 illustra un particolare del dispositivo visto secondo la linea di sezione II-II di fig. 1; - fig. 2 shows a detail of the device seen according to the section line II-II of fig. 1;

- le figg. 3,4,5 e 6 illustrano schematicamente altrettanti particolari del dispositivo in oggetto. Con riferimento alle suddette figure, con 1 è stato indicato, in fig. 1, un dispositivo per l'ottenimento di astucci 3 da corrispondenti fustellati tubolari 2. - figs. 3, 4, 5 and 6 schematically illustrate as many details of the device in question. With reference to the aforementioned figures, 1 has been indicated in fig. 1, a device for obtaining cartons 3 from corresponding tubular blanks 2.

I fustellati tubolari 2, in configurazione appiattita, sono collocati, secondo una pila 11, in un magazzino 10 in questo caso posizionato al disopra della stessa macchina di confezionamento. The tubular blanks 2, in a flattened configuration, are placed, according to a stack 11, in a magazine 10 in this case positioned above the packaging machine itself.

Gli astucci 3 ottenuti sono poi destinati ad essere introdotti tra coppie di rebbi 15 per la loro movimentazione lungo una linea di trasferimento 16. The boxes 3 obtained are then intended to be introduced between pairs of prongs 15 for their movement along a transfer line 16.

Il dispositivo comprende innanzi tutto un tamburo rotante 12, collocato, con l'asse di rotazione orizzontale, tra il magazzino 10 e la linea di trasferimento 16, che viene trascinato in rotazione secondo un prefissato verso R. The device first of all comprises a rotating drum 12, placed, with the axis of rotation horizontal, between the magazine 10 and the transfer line 16, which is rotated according to a predetermined direction towards R.

Sul tamburo 12 sono previsti tre complessi 17, posizionati a 120° l'uno rispetto agli altri sulla sua testata 13, ciascuno comprendente primi e secondi organi di presa 20,30, primi e secondi organi di movimentazione 40,50, e primi e secondi organi di attivazione 60,70, in modo da ottenere tre astucci per ciascun giro completo del tamburo. Three assemblies 17 are provided on the drum 12, positioned at 120 ° with respect to each other on its head 13, each comprising first and second gripping members 20,30, first and second moving members 40,50, and first and second activation members 60, 70, so as to obtain three cases for each complete revolution of the drum.

Per semplicità la seguente descrizione farà perlopiù riferimento ad un solo complesso di tali organi, rimanendo tuttavia ben inteso che quanto detto trova applicazione per il dispositivo realizzato secondo l'invenzione con un qualsivoglia numero di complessi. Considerando quindi uno solo dei complessi 17 illustrati in fig. 1, risulta ovvio che lo stesso assumerà la configurazione dei rimanenti complessi quando verrà a trovarsi nella corrispondente posizione come illustrato. La testata 13 del tamburo 12 supporta i primi organi di presa 20, resi oscillanti radialmente secondo versi opposti rispettivamente centrifugo G e centripeto P, in relazione di fase con la rotazione del tamburo, tra due posizioni estreme, rispettivamente interna N ed esterna M, dai primi organi di movimentazione 40. For the sake of simplicity, the following description will mostly refer to a single assembly of these members, it being however well understood that what has been said applies to the device made according to the invention with any number of assemblies. Considering therefore only one of the assemblies 17 illustrated in fig. 1, it is obvious that it will assume the configuration of the remaining assemblies when it is in the corresponding position as illustrated. The head 13 of the drum 12 supports the first gripping members 20, made to oscillate radially in opposite directions respectively centrifugal G and centripetal P, in phase relation with the rotation of the drum, between two extreme positions, respectively internal N and external M, by first moving parts 40.

Come illustrato in fig. 1, i primi organi di presa 20 consistono di un tubo 21 recante, lungo il suo sviluppo longitudinale, una serie di ventose 22 assoggettate ai primi organi di attivazione 60. As illustrated in fig. 1, the first gripping members 20 consist of a tube 21 carrying, along its longitudinal extension, a series of suckers 22 subjected to the first activation members 60.

In particolare il tubo 21 è supportato, parallelo rispetto all'asse di rotazione del tamburo 12, da una piastra 23 costituente un lato di un parallelogramma articolato 24, a sua volta costituito da due bracci paralleli 27 e 29, incernierati con le corrispondenti estremità rispettivamente alla piastra 23 ed alla testata 13. In particular, the tube 21 is supported, parallel with respect to the rotation axis of the drum 12, by a plate 23 constituting one side of an articulated parallelogram 24, in turn consisting of two parallel arms 27 and 29, hinged with the corresponding ends respectively to the plate 23 and to the head 13.

Sul parallelogramma 24 agiscono i primi organi di movimentazione 40 che sono costituiti da un perno 41 annegato nella testata 13 del tamburo 12, con l'asse parallelo all'asse del tamburo medesimo, alla cui estremità esterna è resa solidale l'estremità del braccio 29 costituente il parallelogramma 24. The first movement members 40 act on the parallelogram 24 which are constituted by a pin 41 embedded in the head 13 of the drum 12, with the axis parallel to the axis of the drum itself, at whose external end the end of the arm 29 is made integral. constituting the parallelogram 24.

Come illustrato in fig. 3, un segmento 42 è reso radialmente solidale alla testata interna al tamburo 12 del perno 41, mentre un pernetto 43 risulta solidale all'estremità libera del segmento 42 e scorrevole entro una camma 44 coassiale con il tamburo 12. As illustrated in fig. 3, a segment 42 is made radially integral with the head inside the drum 12 of the pin 41, while a pin 43 is integral with the free end of the segment 42 and sliding within a cam 44 coaxial with the drum 12.

La rotazione del tamburo determina quindi la rotazione periodica del medesimo segmento 42 trasmessa poi, mediante il perno 41, al parallelogramma 24, ad ottenere la traslazione radiale del tubo 21. The rotation of the drum therefore determines the periodic rotation of the same segment 42 then transmitted, by means of the pin 41, to the parallelogram 24, to obtain the radial translation of the tube 21.

La testata 13 supporta altresì i secondi organi di presa 30, movimentati invece secondo una traiettoria circolare contenuta nel piano della testata 13 stessa, in relazione di fase con i primi organi di presa 20, secondo versi opposti rispettivamente di chiusura C e di apertura A. The head 13 also supports the second gripping members 30, moved instead according to a circular trajectory contained in the plane of the head 13 itself, in phase relationship with the first gripping members 20, according to opposite directions of closing C and opening A respectively.

I secondi organi di presa 30, in modo analogo ai primi organi di presa 20, sono costituiti da un tubo 31 recante, lungo il suo sviluppo longitudinale, una serie di ventose 32 assoggettate al controllo di secondi organi di attivazione 70. The second gripping members 30, similarly to the first gripping members 20, consist of a tube 31 carrying, along its longitudinal development, a series of suckers 32 subject to the control of second activation members 70.

il tubo 31 risulta supportato parallelo rispetto all'asse di rotazione del tamburo 12, da un disco 33 associato alla testata 13, ed è fissato al disco 33 in prossimità della sua circonferenza per ottenere così la traslazione con traiettoria circolare in virtù della rotazione assiale del disco. the tube 31 is supported parallel with respect to the rotation axis of the drum 12, by a disk 33 associated with the head 13, and is fixed to the disk 33 near its circumference to thus obtain the translation with a circular trajectory by virtue of the axial rotation of the disk.

Come illustrato in fig. 4, la movimentazione dei secondi organi di presa 30 è attuata dai secondi organi di movimentazione 50 che comprendono una ruota dentata 51 fissata coassialmente al disco 33 e situata all'interno del tamburo 12, con la quale si impegna un'asta a cremagliera 52, resa scorrevole radialmente lungo organi di guida 53 situati all'interno del tamburo 12 medesimo, al disotto della testata 13. L'asta a cremagliera reca solidale alla sua estremità più interna un pernetto 54, scorrevole entro una camma 55 coassiale con il tamburo 12. As illustrated in fig. 4, the movement of the second gripping members 30 is carried out by the second movement members 50 which comprise a toothed wheel 51 fixed coaxially to the disc 33 and located inside the drum 12, with which a rack rod 52 engages, made to slide radially along guide members 53 located inside the drum 12 itself, below the head 13. The rack rod carries a pin 54 integral with its innermost end, sliding within a cam 55 coaxial with the drum 12.

In questo modo, la rotazione del tamburo provoca l'oscillazione radiale dell'asta a cremagliera 52, secondo versi opposti rispettivamente di andata S e ritorno T, e quindi la rotazione periodica del disco 33 e la rotazione del tubo 31 rispettivamente secondo i versi di apertura A e di chiusura C. In this way, the rotation of the drum causes the radial oscillation of the rack rod 52, according to opposite directions respectively of forward S and return T, and therefore the periodic rotation of the disk 33 and the rotation of the tube 31 respectively according to the directions of opening A and closing C.

Sono inoltre previsti terzi organi di movimentazione 25 dei primi organi di presa 20, illustrati in fig. 5, che sono atti a determinarne il temporaneo arresto, con una lieve oscillazione attorno al loro asse longitudinale, in corrispondenza del magazzino 10, per facilitare l'operazione di prelevamento di un fustellato 2. Third movement members 25 are also provided for the first gripping members 20, illustrated in fig. 5, which are adapted to cause their temporary stop, with a slight oscillation around their longitudinal axis, in correspondence with the magazine 10, to facilitate the operation of picking up a blank 2.

I terzi organi di movimentazione dei primi organi 20 comprendono un segmento 26 incernierato con un'estremità all'estremità del braccio 27, più interno tra i bracci 27 e 29 costituenti il parallelogramma 24 rispetto alla circonferenza del tamburo 12. The third moving members of the first members 20 comprise a segment 26 hinged with one end at the end of the arm 27, innermost between the arms 27 and 29 forming the parallelogram 24 with respect to the circumference of the drum 12.

La rimanente estremità del segmento 26 risulta vincolata ad un perno 34 annegato nella testata 13 del tamburo 12, con l'asse parallelo all'asse del tamburo medesimo. The remaining end of the segment 26 is constrained to a pin 34 embedded in the head 13 of the drum 12, with the axis parallel to the axis of the drum itself.

Una ruota dentata 35 è calettata sul perno 34 e risulta situata all'interno del tamburo 12, mentre un'asta a cremagliera 36, resa scorrevole radialmente lungo organi di guida 37 pure situati all'interno del tamburo 12, al disotto della testata 13, si impegna con la ruota dentata 35. A toothed wheel 35 is keyed on the pin 34 and is located inside the drum 12, while a rack rod 36, made to slide radially along guide members 37 also located inside the drum 12, below the head 13, engages with the toothed wheel 35.

L'estremità più esterna dell'asta a cremagliera 36 supporta girevolmente un pem etto 38 impegnatesi con una camma 39 coassiale con il tamburo 12. The outermost end of the rack rod 36 rotatably supports a pusher 38 engaged with a cam 39 coaxial with the drum 12.

La rotazione del tamburo determina così l'oscillazione radiale dell'asta a cremagliera 36, secondo versi opposti rispettivamente di andata SI e ritorno Tl, per provocare quindi la rotazione periodica del perno 34 e la corrispondente oscillazione del braccio 27 più interno . The rotation of the drum thus determines the radial oscillation of the rack rod 36, according to opposite directions respectively of forward Y1 and return Tl, to cause therefore the periodic rotation of the pin 34 and the corresponding oscillation of the innermost arm 27.

Il risultato è l'ottenimento dell'oscillazione del tubo 21 in senso contrario rispetto alla rotazione del tamburo 12, determinando così un temporaneo arresto delle ventose 22 nella zona corrispondente al magazzino 10. The result is to obtain the oscillation of the tube 21 in the opposite direction with respect to the rotation of the drum 12, thus causing a temporary stop of the suction cups 22 in the area corresponding to the magazine 10.

Ovviamente in questo modo il piano individuato dalle ventose 22 oscilla lievemente attorno ad un asse giacente nel piano medesimo, perpendicolare rispetto alla testata 13 e passante per i centri delle ventose 22. Obviously in this way the plane identified by the suction cups 22 oscillates slightly around an axis lying in the same plane, perpendicular to the head 13 and passing through the centers of the suction cups 22.

Nel dispositivo oggetto della presente invenzione, sono inoltre previsti primi organi di attivazione 60 dei primi organi di presa 20 e secondi organi di attivazione 70 dei secondi organi di presa 30. In the device object of the present invention, first activation members 60 of the first gripping members 20 and second activation members 70 of the second gripping members 30 are also provided.

Nella forma di realizzazione illustrata a scopo esemplificativo e non limitativo nelle allegate figure, i primi organi di attivazione si identificano in parte con i secondi organi di attivazione. In the embodiment illustrated by way of non-limiting example in the attached figures, the first activation members are identified in part with the second activation members.

In particolare, è prevista una piastra 61 coassiale con il tamburo 12 e collocata immediatamente al disotto della testata 13, illustrata in fig. 6. In particular, a plate 61 coaxial with the drum 12 and located immediately below the head 13, illustrated in fig. 6.

Sulla superficie della piastra 61, che risulta rivolta verso la testata 13, sono realizzate delle cavità 64 e 74 a sviluppo curvilineo, concentriche e collegate mediante idonei fori passanti attraverso la piastra con un dispositivo aspirante (non illustrato). On the surface of the plate 61, which is turned towards the head 13, there are cavities 64 and 74 with curvilinear development, concentric and connected by means of suitable holes passing through the plate with a suction device (not shown).

E' quindi prevista una pluralità di condotti flessibili 62 e 72 per il collegamento delle ventose 22 e 32 con la piastra 61. A plurality of flexible ducts 62 and 72 are therefore provided for connecting the suction cups 22 and 32 with the plate 61.

I condotti flessibili 62 sono collegati ciascuno con un corrispondente tubo 21 e, attraverso il medesimo, con le rispettive ventose 22, nonché, con la rimanente estremità, con un raccordo 63 fissato e transitante nella testata 13 in modo da poter strisciare sulla piastra 61. The flexible ducts 62 are each connected to a corresponding tube 21 and, through it, to the respective suction cups 22, as well as, with the remaining end, to a fitting 63 fixed and passing through the head 13 so as to be able to slide on the plate 61.

Le ventose 22 vengono in questo modo poste in collegamento periodicamente, in relazione di fase con la rotazione del tamburo, con le cavità 64, risultando quindi in aspirazione. The suction cups 22 are thus placed in periodic connection, in phase relationship with the rotation of the drum, with the cavities 64, thus resulting in suction.

Allo stesso modo, i condotti flessibili 72 sono collegati ciascuno con un corrispondente tubo 31 e, attraverso il medesimo, con le rispettive ventose 32. La rimanente estremità di ciascun condotto flessibile 72 è poi collegata con un raccordo 73 fissato e transitante nella testata 13 nonché pure strisciante sulla piastra 61. In the same way, the flexible ducts 72 are each connected to a corresponding tube 31 and, through it, to the respective suckers 32. The remaining end of each flexible duct 72 is then connected to a fitting 73 fixed and passing through the head 13 as well as also creeping on plate 61.

In questo modo le ventose 32 risultano poste in collegamento periodicamente, in relazione di fase con la rotazione del tamburo, con le cavità 74, e conseguentemente in aspirazione. In this way the suckers 32 are placed in periodic connection, in phase relationship with the rotation of the drum, with the cavities 74, and consequently in the suction.

Viene ora descritto il funzionamento del dispositivo oggetto della presente invenzione, facendo particolare riferimento alle figure allegate, nelle quali, come già detto, sono illustrati tre complessi di organi come sopra descritto. The operation of the device object of the present invention is now described, with particular reference to the attached figures, in which, as already said, three assemblies of members as described above are illustrated.

La rotazione del tamburo 12 secondo R, grazie all'azione dei primi organi di movimentazione 40, determina l'oscillazione radiale secondo il verso centrifugo G dei primi organi di presa 20, fino a portarli nella posizione esterna M, quando essi giungono in corrispondenza del magazzino 10. The rotation of the drum 12 according to R, thanks to the action of the first moving members 40, causes the radial oscillation according to the centrifugal direction G of the first gripping members 20, until they are brought into the external position M, when they reach the warehouse 10.

A questo punto entrano in azione i terzi organi di movimentazione 25, che determinano l'arresto temporaneo delle ventose 22 rispetto al tamburo 12. At this point the third movement members 25 come into action, causing the suction cups 22 to temporarily stop with respect to the drum 12.

Contemporaneamente i primi organi di attivazione 60 rendono operative le ventose 22, in modo che queste facciano presa su un lato del fustellato 2 da prelevare. Il proseguimento della rotazione del tamburo 12 determina il prelevamento del fustellato 2 dal magazzino 10. At the same time, the first activation members 60 make the suction cups 22 operative, so that they grip one side of the blank 2 to be picked up. The continuation of the rotation of the drum 12 determines the withdrawal of the blank 2 from the magazine 10.

I primi organi di movimentazione 40 quindi determinano l'oscillazione radiale, secondo il verso centripeto P, dei primi organi di presa 30, fino a portarli nella posizione interna N, quando i medesimi primi organi di presa 20 giungono in corrispondenza di un settore intermedio E compreso tra il magazzino 10 e la linea 16. Contestualmente i secondi organi di movimentazione 50 determinano la rotazione secondo il verso di chiusura C, nel settore D compreso tra il magazzino 10 ed il settore intermedio E, dei secondi organi di presa 30, per portarli ad agire con le ventose 32 sul lato del fustellato 2 opposto al lato su cui agiscono le ventose 22 dei primi organi di presa 20, nel settore E, mentre i secondi organi di attivazione 70 rendono operative le ventose 32 medesime. The first movement members 40 therefore determine the radial oscillation, according to the centripetal direction P, of the first gripping members 30, up to bringing them into the internal position N, when the same first gripping members 20 reach an intermediate sector E between the magazine 10 and the line 16. At the same time, the second moving members 50 cause the rotation according to the closing direction C, in the sector D between the magazine 10 and the intermediate sector E, of the second gripping members 30, to bring them to act with the suckers 32 on the side of the blank 2 opposite to the side on which the suckers 22 of the first gripping members 20 act, in the sector E, while the second activation members 70 make the suckers 32 themselves operative.

Quindi, con il tamburo sempre in rotazione, i secondi organi di movimentazione 50 determinano la rotazione dei secondi organi di presa 30 secondo il verso di apertura A, opposto rispetto al verso di chiusura C, nel settore F compreso tra il settore intermedio E e la linea di trasferimento 16. Therefore, with the drum always in rotation, the second movement members 50 cause the rotation of the second gripping members 30 according to the opening direction A, opposite to the closing direction C, in the sector F between the intermediate sector E and the transfer line 16.

Questo movimento determina l'apertura del fustellato 2 e l'ottenimento di un astuccio 3. This movement determines the opening of the blank 2 and obtaining a case 3.

In effetti la rotazione in apertura degli organi 30 si estende oltre il punto in cui viene ottenuto l'astuccio con la corretta configurazione, per snervare il fustellato e consentire il mantenimento della forma dell'astuccio anche dopo la cessazione dell'attivazione delle ventose 32. In fact, the opening rotation of the members 30 extends beyond the point where the carton with the correct configuration is obtained, in order to yield the blank and allow the shape of the carton to be maintained even after the activation of the suction cups 32 has ceased.

Queste ultime, infatti, dal momento in cui vengono a trovarsi in appoggio sul lato opposto del fustellato 2 rispetto al lato su cui agiscono le ventose 22 dei primi organi di presa 20, rimangono operative fino al completamento della loro rotazione secondo il verso di apertura A. The latter, in fact, from the moment in which they rest on the opposite side of the blank 2 with respect to the side on which the suction cups 22 of the first gripping members 20 act, remain operative until their rotation is completed according to the opening direction A .

Il proseguimento della rotazione secondo il verso R del tamburo 12, fà sì che l'astuccio 3 venga poi trovarsi in corrispondenza con la linea di trasferimento 16/ mentre i primi organi di movimentazione 40 determinano l'oscillazione radiale, secondo il verso centrifugo G nel settore F successivo, fino a portare il fustellato, prelevato e trasformato in astuccio, tra i rebbi 15 della linea di trasferimento 16. The continuation of the rotation according to the direction R of the drum 12, causes the case 3 to then be in correspondence with the transfer line 16 / while the first movement members 40 determine the radial oscillation, according to the centrifugal direction G in the next sector F, until the blank, taken and transformed into a case, is brought between the prongs 15 of the transfer line 16.

Quanto proposto dalla presente invenzione è dunque un dispositivo che, dopo aver prelevato un fustellato tubolare in configurazione appiattita da un magazzino, lo apre in modo da ottenerne il corrispondente astuccio e lo deposita, nella corretta configurazione, sulla linea di trasferimento alla stazione di confezionamento. Come risulta evidente da quanto detto, il dispositivo proposto si presenta di sicura funzionalità ed elevata affidabilità . What is proposed by the present invention is therefore a device which, after having taken a tubular blank in a flattened configuration from a magazine, opens it so as to obtain the corresponding case and deposits it, in the correct configuration, on the transfer line to the packaging station. As is evident from what has been said, the proposed device is of safe functionality and high reliability.

Inoltre il dispositivo offre la possibilità di elevate velocità operative, soprattutto grazie al fatto di operare simultaneamente su più fustellati mediante più gruppi di organi. Furthermore, the device offers the possibility of high operating speeds, above all thanks to the fact that it operates simultaneously on several blanks by means of several groups of members.

Si intende che quanto sopra è stato descritto a titolo esemplificativo e non limitativo, per cui eventuali varianti del dispositivo descritto si intendono comprese entro l'ambito protettivo relativo alla presente invenzione come descritta e nel seguito rivendicata. It is understood that what above has been described by way of non-limiting example, therefore any variants of the device described are understood to be included within the protective scope relating to the present invention as described and claimed hereinafter.

Claims

CLAIMS 1) Device for obtaining cases from corresponding tubular blanks placed, in a flattened configuration, in a magazine 10 according to a stack 11, said cases 3 being intended to be introduced between pairs of mobile prongs 15, for their movement along a transfer line 16, said device being characterized in that it comprises: a rotating drum 12, positioned, with the axis of rotation horizontal, between said magazine 10 and said transfer line 16, and rotated according to a predetermined direction towards R; first gripping members 20, supported by a head 13 of said drum 12 and made to oscillate radially in opposite directions respectively centrifugal G and centripetal P, in phase relationship with the rotation of said drum between two extreme positions, respectively internal N and external M ; second gripping members 30, supported by the same head 13 of said drum 12 and moved according to a circular trajectory contained in the plane of said head 13, in phase relationship with said first gripping members 20, according to opposite directions of closure C and opening A; first moving members 40 of said first gripping members 20, adapted to cause the radial oscillation according to the aforementioned centrifugal direction G of said first gripping members, until they are brought into the external position M when the same first gripping members 20 reach correspondence with said magazine 10, to pick up a blank 2 by acting on one of its sides, as well as said first movement members 40 being able to cause the radial oscillation according to the aforementioned centripetal direction P of said first gripping members 20, until they are in the internal position N when the same first gripping members 20 reach an intermediate sector E comprised between said magazine 10 and the aforementioned line 16, finally causing it to oscillate according to the centrifugal direction G in the subsequent sector F, until the blank withdrawn from said transfer line; second moving members 50 of said second gripping members 30, adapted to cause their rotation according to the aforementioned closing direction C, in the sector D between said magazine 10 and the aforementioned intermediate sector E, to bring them to act on the side of said blank 2 drawn opposite to the side on which said first gripping members 20 act, as well as said second moving members 50 of said second gripping members 30, adapted to cause their rotation according to the aforementioned opening direction A in the sector F comprised between said sector intermediate E and the aforementioned transfer line 16, to achieve the opening of said blank 2 and obtaining a case 3; first activation members 60 to make said first gripping members 20 operative from the moment in which they are in correspondence with said magazine 10, in order to determine the withdrawal of a blank 2 from the same magazine 10 by virtue of the rotation according to the predetermined towards R of said drum 12, until the moment in which the aforementioned case 3 is in correspondence with said transfer line 16, to place the same case in the aforementioned transfer line 16; second activation members 70 to make the aforementioned second gripping members 30 operative from the moment in which they are located at the opposite side of said blank 2 with respect to the side on which said first gripping members 20 act, until their completion rotation according to the aforementioned opening direction A, to achieve the opening and yielding of said blank 2 as well as the formation of the aforementioned case 3.

2) Device according to rev. 1, characterized in that it also provides third moving members 25 of said first gripping members 20, adapted to cause their temporary stop, with slight oscillation around their longitudinal axis, in correspondence with said magazine 10, to facilitate the operation of picking up a blank 2 from the aforementioned warehouse.

3) Device according to claim 1, characterized in that said first gripping members 20 consist of a tube 21 carrying, along its longitudinal development, a series of suckers 22 subjected to the control of said first activation members 60, said tube 21 being supported parallel to the rotation axis of said drum 12, by a plate 23 constituting one side of an articulated parallelogram 24, consisting of two parallel arms 27, 29 hinged at the corresponding ends respectively to said plate 23 and to the aforementioned head 13 , on which the aforementioned first movement members 40 act to determine the radial translation, according to the aforementioned centrifugal G and centripetal P opposite directions, of said tube 21.

4) Device according to claim 3, characterized in that said first movement members 40 consist of: a pin 41 embedded in said head 13 of said drum 12, with the axis parallel to the axis of the drum itself, at which the outer end is made integral with the end of one of said arms 29 constituting said parallelogram 24; a segment 42 radially integral with the head inside said drum 12 of said pin 41; a pin 43 made integral with the free end of said segment 42 and sliding within a cam 44 coaxial with said drum 12, to determine the periodic rotation of the same segment 42 then transmitted, by means of said pin 41, to the aforementioned parallelogram 24, to determine the radial translation of the aforementioned tube 21.

5) Device according to claim 1, characterized in that said second gripping members 30 consist of a tube 31 carrying, along its longitudinal development, a series of suckers 32 subjected to the control of said second activation members 70, said tube 31 being supported parallel with respect to the axis of rotation of said drum 12, by a disc 33 associated with said head 13 of said drum 12, as well as said tube 31 being fixed to said disc 33 near the circumference of the latter to obtain the translation with circular trajectory, according to opposite directions respectively of closing C and opening A, of said tube 31 by virtue of the axial rotation of said disk, the latter being subjected to the aforementioned second movement members 50.

6) Device according to rev. 5, characterized in that said second movement members 50 comprise: a toothed wheel 51 fixed coaxially to said disk 33 and located inside said drum 12; a rack rod 52, made to slide radially along guide members 53 located inside said drum 12, below said head 13, said rack rod 52 engaging with said toothed wheel 51; a pin 54 integral with the innermost end of said rack rod 52 and engaging with a cam 55 coaxial with said drum 12, to determine the radial oscillation of said rack rod 52, according to opposite directions respectively of forward direction S and return T, to cause the periodic rotation of said disk 33 and the rotation of said tube 31 respectively according to the aforementioned opening directions A and closing C.

7) Device according to claim 1, characterized by the fact that said third moving members 25 comprise: a segment 26 hinged with one end at the end of the arm 27, innermost between said arms 27, 29 constituting said parallelogram 24 with respect to the circumference of said drum 12, as well as with the remaining end to a pin 34 embedded in said head 13 of said drum 12, with the axis parallel to the axis of the drum itself; a toothed wheel 35 keyed on said pin 34 and located inside said drum 12; a rack rod 36, made to slide radially along guide members 37 located inside said drum 12, below said head 13, said rack rod 36 engaging with said toothed wheel 35; a pin 38 integral with the outermost end of said rack rod 36 and engaging with a cam 39 coaxial with said drum 12, to cause the radial oscillation of said rack rod 36, according to opposite directions respectively of forward YES and return T1, to cause the periodic rotation of said pin 34 and the corresponding oscillation of said innermost arm 27, to obtain the slight oscillation around their longitudinal axis, in correspondence with said magazine 10, of said first gripping members 20, with obtaining of a temporary arrest of the same.

8) Device according to rev. 3, characterized in that said first activating members 60 of said first gripping members 20 comprise: a plate 61 coaxial with said drum 12 and located immediately below said head 13, being made on its surface facing towards said head 13, cavities 64 with concentric curvilinear development connected by means of suitable holes passing through the aforementioned plate with a suction device; a series of flexible ducts 62 each connected to a corresponding tube 21 and, through it, to the respective suction cups 22, as well as connected to the remaining end with a fitting 63 fixed and passing through said head 13 and sliding on said plate 61, in so as to periodically connect, in phase relationship with the rotation of said drum, the relative flexible duct 62 with said cavities 64, thus placing said suction cups 22 in suction.

9) Device according to claim 5, characterized in that said second activation members 70 of said second gripping members 30 comprise: a plate 61 coaxial with said drum 12 and located immediately below said head 13, being made on its surface facing said head 13, of the concentric curvilinear cavities 74 connected by means of suitable holes passing through the aforementioned plate with a suction device; a series of flexible ducts 72 each connected to a corresponding tube 31 and, through it, to the respective suction cups 32, as well as connected to the remaining end with a fitting 73 fixed and passing through said head 13 and sliding on said plate 61, in so as to periodically connect, in phase relationship with the rotation of said drum, the relative flexible duct 72 with said cavities 74, thus placing said suction cups 32 in suction.

10) Device according to claim 1, characterized in that on said drum 12 there are three assemblies 17, positioned at 120 ° with respect to each other on said head 13, each comprising first and second gripping members 20,30, first and second movement members 40,50 of the same, and first and second activation members 60,70, so as to obtain three cases for each complete revolution of said drum.