(19)
(11)EP 3 490 913 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
04.11.2020 Bulletin 2020/45

(21)Application number: 17737845.2

(22)Date of filing:  18.07.2017
(51)International Patent Classification (IPC): 
B65G 23/30(2006.01)
(86)International application number:
PCT/EP2017/068126
(87)International publication number:
WO 2018/019658 (01.02.2018 Gazette  2018/05)

(54)

ASSEMBLY FOR MOVEMENT ACCORDING TO PREDEFINED RULES OF MOTION

ANORDNUNG ZUR BEWEGUNG GEMÄSS VORDEFINIERTER BEWEGUNGSREGELN

ENSEMBLE DE DÉPLACEMENT SELON DES RÈGLES DE MOUVEMENT PRÉDÉFINIES


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 28.07.2016 IT 201600079187

(43)Date of publication of application:
05.06.2019 Bulletin 2019/23

(73)Proprietor: Ilapak Italia S.p.A.
52045 Foiano Della Chiana (AR) (IT)

(72)Inventors:
  • CIVOLANI, Daniele
    40062 Molinella (IT)
  • MARCHIONI, Francesco
    40136 Bologna (IT)

(74)Representative: Modiano, Micaela Nadia et al
Modiano & Partners Via Meravigli, 16
20123 Milano
20123 Milano (IT)


(56)References cited: : 
DE-A1- 19 510 649
FR-A5- 2 236 391
FR-A1- 2 879 179
US-A- 2 917 170
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The present invention relates to an assembly for movement according to predefined rules of motion.

    [0002] All machines used for packaging, and also many processing machines, require the products to be packaged (or the intermediate products on which appropriate processes are to be performed) to comply with specific rules of motion which can provide for portions at constant speed, accelerations, decelerations and stops, which are variously spaced as a function of the requirements of the specific step of processing to which they are subjected.

    [0003] In order to deal with complex rules of motion, specific controlled motor drives are normally used.

    [0004] Generally, in order to ensure that each one of the elements of a carousel or of a line for packaging/processing can move independently of the contiguous ones but in accordance with the specific rule of motion, it is normal to resort to specific controlled motor drive units, which are controlled by a respective control and management processor.

    [0005] This solution offers excellent versatility and allows to comply perfectly with the parameters prescribed by the rule of motion of each individual element.

    [0006] However, the presence of many individually controlled motor drive units entails a considerable increase in production costs (tied to the purchase costs of the individual units) and also the need to have a computer that is capable of managing independently the supply parameters of each individual unit.

    [0007] These machines are therefore extremely expensive.

    [0008] Moreover, the increase in costs, in many cases, cannot be justified in relation to the fact that the various rules of motion of each movable element will remain unchanged throughout the operating life of the machine.

    [0009] The reconfiguration possibility that is typical of controlled motor drive units, therefore, in many cases is not utilized fully and validly.

    [0010] This entails that machines of the known type, in order to cope with the need to move each element according to a specific, predefined and complex rule of motion, resort to controlled movement units which are controlled by a respective computer, despite not providing for possible modifications of said rules of motion, with consequent high production costs.

    [0011] It is also known to resort to machines the movable elements of which are all mounted on respective conveyance elements that trace the steps of a common rule of motion.

    [0012] Obviously, in this manner it is not possible to operate continuously, and each stop affects all the elements, greatly limiting the speed of machine and minimizing its productivity. The document US 2 917 170 A discloses an assembly for movement according to the preamble of claim 1.

    [0013] The aim of the present invention is to solve the problems described above, by proposing an assembly for movement according to predefined rules of motion that is capable of ensuring the correct movement of separate elements according to specific and complex rules of motion.

    [0014] Within this aim, an object of the invention is to propose an assembly for movement according to predefined rules of motion that has modest costs.

    [0015] Another object of the present invention is to propose an assembly for movement according to predefined rules of motion that does not require complex logic systems for the control of distinct motor drive units.

    [0016] Another object of the present invention is to propose an assembly for movement according to predefined rules of motion that can operate at high speed.

    [0017] Another object of the present invention is to propose an assembly for movement according to predefined rules of motion that ensures high productivity.

    [0018] A further object of the present invention is to provide an assembly for movement according to predefined rules of motion that has modest costs, is relatively simple to provide in practice and is safe in application.

    [0019] This aim and these objects are achieved by an assembly for movement according to claim 1.

    [0020] Further characteristics and advantages of the invention will become better apparent from the description of a preferred but not exclusive embodiment of the assembly for movement according to predefined rules of motion according to the invention, illustrated by way of nonlimiting example in the accompanying drawings, wherein:

    Figure 1 is a schematic side view of a portion of an assembly for movement according to predefined rules of motion according to the invention;

    Figure 2 is a schematic side view of an enlargement of a movement adjustment apparatus of the assembly of Figure 1, showing some possible operating configurations;

    Figure 3 is a schematic side view of a part of the apparatus of Figure 2;

    Figure 4 is a schematic top view of the assembly of Figure 1.



    [0021] With particular reference to the figures above, the reference numeral 1 designates generally an assembly for movement according to predefined rules of motion.

    [0022] The movement assembly 1 comprises a supporting frame which forms a working path which accommodates a driving element 2, with which at least one movable element 3 is associated which is adapted to move an item to be subjected to a process.

    [0023] The item to be subjected to a process can be, depending on the cases and on the possible applications, a package to be formed, a product (or a set of products) to be subjected to packaging or to be subjected to specific processes.

    [0024] Substantially in interposition between the driving element 2 and each respective movable element 3, the movement assembly 1 comprises at least one movement adjustment apparatus 4.

    [0025] The apparatus 4 is in turn constituted by a contoured guide 5, which is arranged substantially parallel to the driving element 2, by at least one first lever 6, which has a first end 7 that can slide within the guide 5 and a portion 8 that is pivoted to at least one second lever 9, which in turn is rigidly coupled to the driving elements 2.

    [0026] The at least one first lever 6 has a second end 10, which is opposite the one that can slide (end 7) in the guide 2, articulated to a linkage 11, which in turn is pivoted to a portion 12 of a respective movable element 3.

    [0027] The particular apparatus 4 provides separation between the movable element 3 and the driving elements 2; this separation, by utilizing the mutual articulation of the first lever 6, of the second lever 9 and of the linkage 11, allows to obtain a variable motion (according to a specific rule of motion which can comprise positive, negative or nil acceleration values and also stop intervals) of the movable element 3 even if the driving elements 2 move with constant speed, by virtue of the particular shape of the contoured guide 5 that constitutes the compulsory path for the first end 7 of the first lever 6.

    [0028] In this matter it is possible to obtain stops of one movable element 3 (while the driving elements move at predefined speed) and/or local spacing variations between two contiguous elements 3 (in practice, the two elements 3 can vary their mutual distance, with positive and/or negative accelerations, while the driving elements 2 move at a predefined speed).

    [0029] With particular reference to a constructive solution of unquestionable interest in practice and in application, the at least one first lever 6 can be validly essentially L-shaped.

    [0030] It is specified that in this case one end 13 of the at least one second lever 9 is pivoted to the portion 8 of the first lever 6, which is formed at the angular portion that connects the two linear bands of the first lever 6.

    [0031] According to a particularly efficient embodiment, the at least one second lever 9 comprises a first portion 14 for coupling to the driving element 2 and at least one second portion 15 for connection to the first lever 6.

    [0032] The second portion 15 comprises a head (the end 13) for pivoting to the portion 8 of the corresponding first lever 6.

    [0033] The first portion 14 and the second portion 15 of the second lever 9 can be mutually inclined in order to allow easy pivoting of the end 13 to the portion 8 of the first lever 6.

    [0034] It is deemed useful to specify, further, that the at least one movable element 3 can slide conveniently on respective tracks 16 which are substantially aligned with the driving element 2 and with the contoured guide 5.

    [0035] Merely by way of example, it is specified that the tracks 16, the driving element and the contoured guide 5 can be usefully arranged in a loop, forming a configuration of the assembly 1 of the type of a carousel. This shape is particularly widespread and used in all industrial sectors and therefore it is deemed that the assembly 1 according to the invention can be used widely with this specific geometric/constructive shape.

    [0036] In any case, the adoption of other shapes, such as for example linear ones (of which a single active portion will be utilized for production purposes, the passive portion merely having the purpose of returning the elements 3 upstream of the active portion), is not excluded.

    [0037] According to the invention, contoured guide 5 comprises an alternation of curved parts 17, parts 18 which are parallel to the driving element 2, parts 19, 20 which are inclined with respect to the driving element 2, and connecting parts interposed between the previously cited ones.

    [0038] A particular succession of inclined parts 19 and 20 (in particular mutually complementarily inclined) provides for the presence of connecting portions formed between them.

    [0039] With particular reference to the constructive mode described previously, each movable element 3, upon the passage of the first end 7 of the corresponding first lever 6 in a region of the contoured guide 5 that comprises complementarily inclined parts 19, 20 in sequence, arranged substantially like a sawtooth path 21, can slide with a substantially intermittent motion along the respective tracks 16.

    [0040] In particular, upon the passage of the first end 7 of the first lever 6 in a region 18 of the contoured guide 5 that is parallel to the driving element 2, the element 3 can slide at a constant speed along the respective tracks 16 and, upon the passage of the first end 7 of the first lever 6 in a region 17, 19, 20 of the contoured guide 5, which is inclined and/or curved with respect to the driving element 2, it accelerates or decelerates along the respective tracks 16.

    [0041] The motionless condition can be obtained by imparting a negative acceleration which forces a retrograde motion of the movable element 3 with respect to the driving elements 2 with a speed that is equal and opposite with respect to the driving speed of said elements: in this manner, the resultant of the two speeds (which are substantially identical and opposite) entails a motionless interval of the movable element 3 with respect to the track 5.

    [0042] Furthermore, it is specified that the driving element 2 is preferably chosen from a belt, a chain, a conveyor belt, a cable, a rack and the like.

    [0043] The portion 14 mates with the driving element by means of a unit 22 for coupling thereto: merely by way of example, the coupling units 22 can be constituted by wheels, rollers or carriages, although the adoption of components of a different type, as a function of the constructive requirements and of the characteristics of the driving elements 2 used, is not excluded.

    [0044] In order to allow more efficient operation and minimize friction, the first end 7 of the first lever 6 can positively comprise a free end roller, which is accommodated slidingly within the contoured guide 5.

    [0045] In order to provide greater detail of the constructive aspects of the present invention, it is specified that the first L-shaped lever 6 comprises validly a shorter band 23, which ends with the end 7 engaged slidingly in the contoured guide 5, and a longer band 24 which is articulated to the linkage 11 with the end 10.

    [0046] Finally, it is specified that, with reference to the constructive solution that is given by way of example in the accompanying figures and constitutes a version of particular interest in application, the contoured guide 5 and the tracks 16 can be substantially mutually opposite with respect to the driving element 2.

    [0047] Advantageously, the present invention solves the problems described previously, proposing a movement assembly 1 which is suitable to impart, according to predefined rules of motion, to specific movable elements 3 designed for the movement of a product, an intermediate product or a package (or part thereof), capable of ensuring the correct movement of the distinct elements 3 according to specific and complex rules of motion.

    [0048] Conveniently, the assembly 1 does not comprise a specific controlled drive unit for each movable element 3 and, for this reason, it entails modest costs in terms of production, installation and management.

    [0049] Positively, the movement assembly 2 does not require complex logic systems for the control of distinct motor drive units and therefore does not need to be controlled by a control and management processor of the high-performance type (which for this reason is complex and expensive). Validly, the movement assembly 1 can operate at high speed. Efficiently, the movement assembly 1 ensures high productivity.

    [0050] Advantageously, the movement assembly 1 according to the invention can be provided in practice in a relatively simple manner, bearing substantially modest costs: these characteristics render the assembly 1 according to the invention an innovation of assured application.

    [0051] The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.


    Claims

    1. An assembly for movement according to predefined rules of motion, of the type comprising a supporting frame forming a working path that accommodates a driving element (2) with which at least one movable element (3) is associated which is adapted to move an item to be subjected to a process,wherein interposed between said driving element (2) and each respective movable element (3), at least one movement adjustment apparatus (4) which comprises a contoured guide (5), which is arranged substantially parallel to said driving element (2), at least one first lever (6) that has a first end (7) that can slide within said guide (5), and a portion (8) that is pivoted to at least one second lever (9), which in turn is coupled rigidly to said driving elements (2), said at least one first lever (6) having a second end (10), which is opposite the one that can slide in the guide (5), which is articulated to a linkage (11), which in turn is pivoted on a portion (12) of a respective movable element (3) characterized in that said contoured guide (5) comprises an alternation of curved parts (17), parts (18) which are parallel to said driving element (2), parts (19, 20) which are inclined with respect to said driving element (2), and connecting parts which are interposed between the ones mentioned above.
     
    2. The movement assembly according to claim 1, characterized in that said at least one first lever (6) is substantially L-shaped, one end (13) of said at least one second lever (9) being pivoted to said first lever (6) at the angular connecting portion between the two linear bands of said at least one first lever (6).
     
    3. The movement assembly according to claim 1, characterized in that said at least one second lever (9) comprises a first portion (14) for coupling to said driving element (2) and at least one second portion (15) for connection to said first lever (6), said second portion (15) comprising a head (13) for pivoting to said portion (8) of said at least one first lever (6).
     
    4. The movement assembly according to claim 1, characterized in that said at least one movable element (3) preset for the movement of an item to be subjected to a process can slide on respective tracks (16) which are substantially aligned with said driving element (2) and with said contoured guide (5).
     
    5. The movement assembly according to claim 4, characterized in that said movable element (3), upon the passage of said first end (7) of said at least one first lever (6) in a region (21) of said contoured guide (5) that comprises complementarily inclined parts (19, 20) in sequence, which are arranged substantially in a sawtooth arrangement, slides with a substantially intermittent motion along the respective tracks (16), upon the passage of said first end (7) of said at least one first lever (6) in a region (18) of said contoured guide (5) that is parallel to said driving element (2), slides at a constant speed along the respective tracks (16) and, upon the passage of said first end (7) of said at least one first lever (6) in a region (17, 19, 20) of said contoured guide (5) that is inclined and/or curved with respect to said driving element (2), accelerates or decelerates along the respective tracks (16).
     
    6. The movement assembly according to one or more of the preceding claims, characterized in that said driving element (2) is of the type chosen preferably among a belt, a chain, a conveyor belt, a cable, a rack and the like.
     
    7. The movement assembly according to one or more of the preceding claims, characterized in that the first end (7) of said first lever (6) comprises a free end roller, which is accommodated within said contoured guide (5).
     
    8. The movement assembly according to one or more of the claims 2-7, characterized in that said first L-shaped lever (6) comprises a shorter band (23) which ends with said end (7) engaged slidingly within said contoured guide (5) and a longer band (24) which is articulated with the end (10) to said linkage (11).
     
    9. The movement assembly according to one or more of the claims 4-8, characterized in that said contoured guide (5) and said tracks (16) are substantially mutually opposite with respect to said driving element (2).
     


    Ansprüche

    1. Eine Anordnung zur Bewegung gemäß vordefinierten Bewegungsregeln von der Art, die einen Stützrahmen umfasst, der einen Arbeitspfad bildet, welcher ein Antriebselement (2) enthält, mit dem mindestens ein bewegliches Element (3) verbunden ist, welches ausgebildet ist, um einen Gegenstand zu bewegen, der einem Prozess unterzogen werden soll; wobei sich zwischen dem Antriebselement (2) und jedem einzelnen beweglichen Element (3) mindestens eine Bewegungsanpassungsvorrichtung (4) befindet, die eine konturierte Führung (5) umfasst, welche im Wesentlichen parallel zu dem Antriebselement (2) angeordnet ist; mindestens einen ersten Hebel (6) mit einem ersten Ende (7), das in der Führung (5) gleiten kann; und einen Abschnitt (8), der drehgelenkig mit mindestens einem zweiten Hebel (9) verbunden ist, welcher wiederum starr mit den Antriebselementen (2) gekoppelt ist; wobei der mindestens eine erste Hebel (6) ein zweites Ende (10) hat, das demjenigen gegenüberliegt, das in der Führung (5) gleiten kann, und das gelenkig mit einem Verbindungselement (11) verbunden ist, welches wiederum drehgelenkig mit einem Abschnitt (12) eines entsprechenden beweglichen Elements (3) verbunden ist; dadurch gekennzeichnet, dass die konturierte Führung (5) eine Alternation gekrümmter Teile (17), Teile (18), die parallel zu dem Antriebselement (2) sind, Teile (19, 20), die im Verhältnis zu dem Antriebselement (2) geneigt sind, und Verbindungsteile umfasst, die zwischen den oben erwähnten Teilen angeordnet sind.
     
    2. Die Bewegungsanordnung gemäß Anspruch 1, dadurch gekennzeichnet, dass der mindestens eine erste Hebel (6) im Wesentlichen L-förmig ist, wobei ein Ende (13) des mindestens einen zweiten Hebels (9) zwischen den zwei linearen Leisten des mindestens einen ersten Hebels (6) drehgelenkig mit dem ersten Hebel (6) verbunden ist.
     
    3. Die Bewegungsanordnung gemäß Anspruch 1, dadurch gekennzeichnet, dass der mindestens eine zweite Hebel (9) einen ersten Abschnitt (14) zur Kopplung mit dem Antriebselement (2) und mindestens einen zweiten Abschnitt (15) zur Verbindung mit dem ersten Hebel (6) umfasst, wobei der zweite Abschnitt (15) einen Kopf (13) zur drehgelenkigen Verbindung mit dem Abschnitt (8) des mindestens einen ersten Hebels (6) umfasst.
     
    4. Die Bewegungsanordnung gemäß Anspruch 1, dadurch gekennzeichnet, dass das mindestens eine bewegliche Element (3), das zur Bewegung eines Gegenstands bestimmt ist, der einem Prozess unterzogen werden soll, auf entsprechenden Schienen (16) gleiten kann, die im Wesentlichen mit dem Antriebselement (2) und mit der konturierten Führung (5) ausgerichtet sind.
     
    5. Die Bewegungsanordnung gemäß Anspruch 4, dadurch gekennzeichnet, dass das bewegliche Element (3) beim Übergang des ersten Endes (7) des mindestens einen ersten Hebels (6) in einen Bereich (21) der konturierten Führung (5), der hintereinander komplementär geneigte Teile (19, 20) umfasst, die im Wesentlichen in einer Sägezahnanordnung angeordnet sind, mit einer im Wesentlichen intermittierenden Bewegung die entsprechenden Schienen (16) entlanggleitet; beim Übergang des ersten Endes (7) des mindestens einen ersten Hebels (6) in einen Bereich (18) der konturierten Führung (5), der parallel zu dem Antriebselement (2) ist, mit konstanter Geschwindigkeit die entsprechenden Schienen (16) entlanggleitet und beim Übergang des ersten Endes (7) des mindestens einen ersten Hebels (6) in einen Bereich (17, 19, 20) der konturierten Führung (5), der im Verhältnis zu dem Antriebselement (2) schräg und/oder gekrümmt ist, entlang den entsprechenden Schienen (16) beschleunigt oder abbremst.
     
    6. Die Bewegungsanordnung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass das Antriebselement (2) von der Art ist, die vorzugsweise gewählt ist aus einem Riemen, einer Kette, einem Förderband, einem Kabel, einer Zahnstange und dergleichen.
     
    7. Die Bewegungsanordnung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass das erste Ende (7) des ersten Hebels (6) eine freie Endrolle umfasst, die in der konturierten Führung (5) untergebracht ist.
     
    8. Die Bewegungsanordnung gemäß einem oder mehreren der Ansprüche 2-7, dadurch gekennzeichnet, dass der erste L-förmige Hebel (6) eine kürzere Leiste (23) umfasst, die mit dem Ende (7) verschiebbar in die konturierte Führung (5) eingreifend endet, und eine längere Leiste (24), die an ihrem Ende (10) gelenkig mit dem Verbindungselement (11) verbunden ist.
     
    9. Die Bewegungsanordnung gemäß einem oder mehreren der Ansprüche 4-8, dadurch gekennzeichnet, dass die konturierte Führung (5) und die Schienen (16) einander mit Bezug auf das Antriebselement (2) im Wesentlichen gegenüberliegen.
     


    Revendications

    1. Ensemble de déplacement selon des règles de mouvement prédéfinies, du type comportant un châssis de support formant un trajet de travail qui reçoit un élément d'entraînement (2) auquel est associé au moins un élément mobile (3) qui est adapté pour déplacer un article devant être soumis à un processus, dans lequel entre ledit élément d'entraînement (2) et chaque élément mobile (3) respectif est intercalé au moins un appareil de réglage de déplacement (4) qui comporte un guide profilé (5), qui est agencé sensiblement parallèle audit élément d'entraînement (2), au moins un premier levier (6) qui a une première extrémité (7) qui peut glisser à l'intérieur dudit guide (5), et une portion (8) qui pivote sur au moins un second levier (9), qui est à son tour couplé rigidement audit élément d'entraînement (2), ledit au moins un premier levier (6) ayant une seconde extrémité (10), qui est opposée à celle qui peut glisser dans le guide (5), qui est articulée sur une tringlerie (11), qui pivote à son tour sur une portion (12) d'un élément mobile (3) respectif, caractérisé en ce que ledit guide profilé (5) comporte une alternance de parties incurvées (17), de parties (18) qui sont parallèles audit élément d'entraînement (2), de parties (19, 20) qui sont inclinées par rapport audit élément d'entraînement (2), et de parties de liaison qui sont intercalées entre celles mentionnées ci-dessus.
     
    2. Ensemble de déplacement selon la revendication 1, caractérisé en ce que ledit au moins un premier levier (6) est sensiblement en forme de L, une extrémité (13) dudit au moins un second levier (9) pivotant sur ledit premier levier (6) au niveau de la portion de liaison angulaire entre les deux bandes linéaires dudit au moins un premier levier (6).
     
    3. Ensemble de déplacement selon la revendication 1, caractérisé en ce que ledit au moins un second levier (9) comporte une première portion (14) pour un couplage audit élément d'entraînement (2) et au moins une seconde portion (15) pour un raccordement audit premier levier (6), ladite seconde portion (15) comportant une tête (13) pour un pivotement sur ladite portion (8) dudit au moins un premier levier (6).
     
    4. Ensemble de déplacement selon la revendication 1, caractérisé en ce que ledit au moins un élément mobile (3) préréglé pour le déplacement d'un article devant être soumis à un processus peut glisser sur des glissières (16) respectives qui sont sensiblement alignées avec ledit élément d'entraînement (2) et avec ledit guide profilé (5).
     
    5. Ensemble de déplacement selon la revendication 4, caractérisé en ce que ledit élément mobile (3), lors du passage de ladite première extrémité (7) dudit au moins un premier levier (6) dans une zone (21) dudit guide profilé (5) qui comporte des parties inclinées de manière complémentaire (19, 20) en séquence, qui sont agencées sensiblement dans un agencement en dent de scie, glisse avec un mouvement sensiblement intermittent le long des glissières (16) respectives, lors du passage de ladite première extrémité (7) dudit au moins un premier levier (6) dans une zone (18) dudit guide profilé (5) qui est parallèle audit élément d'entraînement (2), glisse à une vitesse constante le long des glissières (16) respectives et, lors du passage de ladite première extrémité (7) dudit au moins un premier levier (6) dans une zone (17, 19, 20) dudit guide profilé (5) qui est inclinée et/ou incurvée par rapport audit élément d'entraînement (2), accélère ou décélère le long des glissières (16) respectives.
     
    6. Ensemble de déplacement selon une ou plusieurs des revendications précédentes, caractérisé en ce que ledit élément d'entraînement (2) est du type choisi de préférence parmi un tapis, une chaîne, une bande de convoyage, un câble, une crémaillère et analogue.
     
    7. Ensemble de déplacement selon une ou plusieurs des revendications précédentes, caractérisé en ce que la première extrémité (7) dudit premier levier (6) comporte un galet d'extrémité libre, qui est reçu à l'intérieur dudit guide profilé (5).
     
    8. Ensemble de déplacement selon une ou plusieurs des revendications 2 à 7, caractérisé en ce que ledit premier levier en forme de L (6) comporte une bande plus courte (23) qui se termine avec ladite extrémité (7) engagée de manière glissante à l'intérieur dudit guide profilé (5) et une bande plus longue (24) qui est articulée avec l'extrémité (10) sur ladite tringlerie (11).
     
    9. Ensemble de déplacement selon une ou plusieurs des revendications 4 à 8, caractérisé en ce que ledit guide profilé (5) et lesdites glissières (16) sont pratiquement mutuellement opposés par rapport audit élément d'entraînement (2).
     




    Drawing














    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description