EP0524134B1 - Méthode et dispositif pour délivrer un ruban à cercler - Google Patents

Méthode et dispositif pour délivrer un ruban à cercler Download PDF

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Publication number
EP0524134B1
EP0524134B1 EP92810248A EP92810248A EP0524134B1 EP 0524134 B1 EP0524134 B1 EP 0524134B1 EP 92810248 A EP92810248 A EP 92810248A EP 92810248 A EP92810248 A EP 92810248A EP 0524134 B1 EP0524134 B1 EP 0524134B1
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EP
European Patent Office
Prior art keywords
band
storage device
tape
feed
reverse
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.)
Expired - Lifetime
Application number
EP92810248A
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German (de)
English (en)
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EP0524134A3 (en
EP0524134A2 (fr
Inventor
W.F.S.M. Van Wegen
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.)
Metaverpa NV
Metaverpa BV
Original Assignee
Metaverpa NV
Metaverpa BV
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Publication date
Application filed by Metaverpa NV, Metaverpa BV filed Critical Metaverpa NV
Publication of EP0524134A2 publication Critical patent/EP0524134A2/fr
Publication of EP0524134A3 publication Critical patent/EP0524134A3/de
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Publication of EP0524134B1 publication Critical patent/EP0524134B1/fr
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Expired - Lifetime legal-status Critical Current

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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
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools

Definitions

  • the invention lies in the field of packaging machines and relates to a method and an apparatus for belt conveying according to the preambles of claims 1 and 12.
  • strapping or strapping goods metal or plastic straps are often used as strapping material.
  • the goods to be packed e.g. A cardboard box or a bundle of newspapers, magazines, etc. is brought into the packaging position, spanned by the belt there and then transported, for example, to the shipping company. In many cases, the goods are also spanned crosswise with a band.
  • Such a belt conveyor device is described for example in the publication JP-53-123299.
  • the device has, on the belt path in the direction of the forward conveyance, means for conveying the belt forward, a tape advance storage device, a tape return storage device and a means for reverse conveying the tape.
  • the tape runs through the two stores even when stretched, that is, even if the store itself is empty. For this reason, the tape must be fed through the two stores when it is introduced into the device. Furthermore, the tape for storage in the stores is absolutely disordered.
  • a conventional belt conveyor system is shown schematically in FIG.
  • the tape 1 is fed from a tape reel 12 via a tape feed store 2 and guided to the packaging point or the tape channel 13 via a plurality of deflection rollers 16.1-16.3.
  • the belt can be transported forwards (in the direction of the belt channel 13) and backwards when the belt is tightened (in the belt return storage 6).
  • the construction shown consists of a movable storage arm 23 with deflection rollers 22.1, 22.3, 22.5 and firmly suspended deflection rollers 22.2, 22.4, 22.6 over which the belt is guided in a meandering manner. If the belt 1 is now conveyed forward at high speed, the storage arm 23 together with the deflecting rollers 22.1, 22.3, 22.5 is approximated to the fixed deflecting rollers 22.2, 22.4, 22.6 and the belt feed store 2 is thus partially emptied.
  • This construction has an undefined amount of tape in advance, the manual tape insertion process is very complex and the system has a relatively low dynamic range. The low dynamics lead to jerky loads on the belt at high speeds, which can lead to very high tension forces in the belt.
  • a return conveyor 6 takes up the band.
  • the short-term material is collected in a buffer.
  • a belt brake 26 is provided in order to maintain the belt tension.
  • the idea according to the invention is based on increasing the dynamics of the feed / tensioning process (and thus the packing speed) and protecting the strip material on the one hand by largely avoiding mechanical parts and on the other hand by means of separate, switchable tape feed and tape return memories and by automatically storing these (without manual intervention) are self-loading and self-emptying.
  • FIG. 2 now shows an embodiment of the device according to the invention.
  • the tape 1 is fed from a tape reel 12 and drawn in via a first pair of conveyor rollers 17.1, which also serves to deflect the tape. Then it passes through a buffer separator 3, which is used to select the desired memory or buffer. This buffer separator 3 is followed by a second pair of conveyor rollers 17.2, which is used to return the belt when the goods are tied up.
  • the tape is guided linearly over a longer distance and in this area, the tensioning section 24, is at least partially guided through a tape feed channel 9.
  • this tape feed channel allows the tape to be inserted automatically or the tape channel 13 to be automatically loaded (pre-feed) by preventing the tape from buckling.
  • a third pair of conveyor rollers 17.3 finally conveys the belt in the area in front of the belt channel 13 (packing point), which is shown here in broken lines, and thus serves to feed the belt channel 13.
  • the conveyor roller pairs 17.1-17.3 are driven by a common belt motor 33 via drive belts 34, the directions of rotation of the conveyor roller pairs are marked in the figure.
  • a tensioning device 4 can also be seen in this FIG. If the tensioning device 4 is moved linearly against the normal conveying direction of the tape during tensioning of the tape 1, the tape feed channel 9 can be pivoted away so that these two devices do not get in the way.
  • two tape storage devices 10.1, 10.2 are now available, both of which are (still) empty in this figure.
  • the tape stores are as flat chambers folded out, each have an inlet / outlet opening 20.1, 20.2.
  • the chambers are essentially closed except for these two openings 20.1, 20.2 and have a width which corresponds to the width of the widest band material to be used, ie 4-20 mm, but is preferably 5 mm.
  • the stores consist of a flat, closed plate sandwich construction with plastic or metal plates, which has a partition wall 25 between the plates to separate the two chambers.
  • the size of the two chambers is adapted to the required length of the strip material to be stored.
  • a monitoring sensor 14 for example a light barrier or a distance measuring sensor, is provided for the tape advance storage 10.1, with which the amount of the strip material to be stored can be monitored and controlled.
  • a corresponding sensor can also be provided for monitoring the tape return memory 10.2, which permits even more precise monitoring of the tape storage.
  • a movable auxiliary belt channel 7 serves to guide the belt 1 (pre-feed) by bridging or opening the openings 20.1, 20.2 of the two stores 10.1, 10.2. The mode of operation of this belt conveyor system will be explained in more detail with reference to the following figures.
  • the filling of the tape advance storage 10.1 is illustrated with the aid of FIG.
  • the band has already been introduced into the band channel 13 (not shown here), which means that the system is ready for packing a strapping unit.
  • the tape advance storage 10.1 can be filled.
  • the filling process of the tape feed store 10.1 is initiated by pulling in tape material by means of the first pair of conveyor rollers 17.1 and actuating the buffer separator 3 beforehand or simultaneously , the functioning of which will be explained in detail later with reference to FIG. 5.
  • the auxiliary belt channel 7 is in the side swung away condition.
  • the buffer separator By blocking the band passage in the area of the feed / exit opening 20.1, the buffer separator prevents the band from passing freely at this point. If at the same time the first pair of conveyor rollers 17.1 is driven in the forward direction to lock, as indicated by the arrows ⁇ 1 and ⁇ 2 , the belt in the area in front of the buffer separator 3 is bulged out like a loop. This band bulge A is received by the band advance storage 10.1, which is designed here as a flat chamber. The retraction of the belt bulge or belt loop into the storage space is supported by a conveyor arrangement 11, here two rotating disks 19.1, 19.2 with a rotating conveyor belt 18. As a result, the strip material can be drawn into the storage space with particular care.
  • the conveyor arrangement 11 is driven by the belt motor 33 (FIG. 2) or a separate drive.
  • the direction of rotation of these rotary disks 19.1, 19.2 is selected such that the tape bulge A is drawn into the insertion channel 8.1 of the tape advance storage 10.1 and is guided into the actual storage space 15.1.
  • the monitoring sensor 14 triggers a signal which can be used in particular to switch the conveying of the first conveyor roller pair 17.1 on and off.
  • the filling of the storage is interrupted in such a way that no deformations or even tangles of the tape can arise due to too much tape material in the tape advance storage 10.1.
  • the band suffers only one flexion, ie it is completely controllable and does not pack up, ie it does not buckle.
  • the filling of the belt store is therefore achieved by coordinated interaction of the buffer separator 3 with the first pair of conveyor rollers 17.1.
  • the rollers of the first conveyor roller pair 17.1 are released and the drive of this conveyor roller pair 17.1 is thus interrupted, ie there is a possibility that the belt 1 can pass freely between the rollers.
  • a band brake (not shown here) can be provided to maintain the band tension. When emptying the Tape storage, the upper tape runs smoothly on the lower tape.
  • the tape feed store has the form of a closed channel of varying height, ie at the feed / outlet opening 20.1 of the tape feed store this channel is relatively narrow and expands against the usual storage space 15.1.
  • the narrow sides of the channel are formed on the one hand by a dividing wall 25 between the tape feed and tape return storage or an end wall 34 into which the dividing wall merges, and on the other hand by the appropriately arranged conveyor belt 18.
  • the channel has a U-shaped bend, which then leads the actual storage space 15.1 where the channel expands.
  • the radius of curvature of this bend is predetermined by the rotary disc 19.2 used.
  • the radius of curvature of the channel is adapted to the strip materials used and the area of application of the machine. For special applications, this channel or the storage space can be extended or enlarged and have, for example, a second bend or curve.
  • the tape advance storage device 10.1 according to the invention means that the tape is not hindered by mechanical parts, such as deflection rollers, etc., and harmful loads on the tape (stretching, jerky loads, etc.) are avoided.
  • FIG. 4 shows the device with filled tape feed storage 10.1 and filled tape return storage 10.2 immediately after packaging, ie after tensioning the tape 1. Similar to the method already described for filling the tape feed storage 10.1, the tape return storage 10.2 is also filled.
  • the blocking of the buffer separator 3 with simultaneous return of the belt 1 by means of the second pair of conveyor rollers 17.2 causes a belt bulge B, which is received through the opening 20.2 and then through the belt return store 10.2.
  • the tape return store has no device corresponding to the conveyor arrangement 11, since the tape return store 10.2 generally only has to take up relatively little tape material and therefore an additional auxiliary device for pulling in the tape is not necessary.
  • the maximum amount of tape material to be taken up by the tape return store 10.2 depends on the length of the tape channel 13 or on the material to be strapped.
  • the return of the belt 1 by means of the second pair of conveyor rollers 17.2 takes place before or during the tensioning of the belt 1 with the tensioning device 4.
  • the dashed lines indicate that the belt feed channel 9 has been pivoted away from the belt 1 or moved away in order to give the tensioning device 4 space to let.
  • the required movement is preferably carried out by means of a lifting cylinder, not shown here.
  • the tensioning device 4 is provided with a gripper 21, which holds the tape 1 and pulls it by means of a linear tensioning movement in the direction of the arrow S out of the tape channel 13 (see FIGS.
  • the device according to the invention has the additional advantage that the tensioning device 4 and the return rollers (pair of conveyor rollers 17.2) are arranged such that the The belt is not tensioned over two or more additional deflection rollers, which could lead to undesirable belt deformations due to the large tension forces that occasionally occur.
  • the tape can then be welded or glued in a conventional manner and a new packing cycle can begin.
  • Figure 5 illustrates the operation of the buffer separator 3.
  • the figure shows a cross section through the buffer separator according to section AA (Fig. 2).
  • the belt 1 passes through a locking device 27.
  • This locking device comprises a locking pin 30 movable via a pneumatic cylinder 29 and a pressing element 28. If the lock is activated, the belt is clamped between the locking pin 30 and pressing element 28 and the belt passage through the buffer separator is thereby inhibited or interrupted.
  • a second hydraulic or pneumatic cylinder 31 is used to adjust the auxiliary belt channel 7 (see FIGS. 2 and 3). By operating this hydraulic cylinder, the auxiliary belt channel 7 can be moved back and forth in the direction of the arrow R.
  • Figure 5 shows the auxiliary belt channel 7 in the pivoted-away position, i.e. the feed / outlet openings 20.1, 20.2 of the stores 10.1, 10.2 are released or opened.
  • the auxiliary belt channel 7 is closed; when the belt is pre-stored and when the belt is fed back and buffered, it is pivoted away to the side.
  • FIGS. 6.1 to 6.4 The centerpiece is the cyclical, coordinated control of the tape feed and tape return storage 10.1, 10.2.
  • An overall diagram is shown in Fig. 6.1.
  • the cyclic packing or belt conveying process (c) can be started directly. Filling the tape channel requires the tape to be pre-stored, since the tape must be inserted into the tape channel at a relatively high speed. Therefore, if the tape channel (d) is empty, the tape must first be pre-stored. If the tape advance storage 10.1 (FIG. 2) is not yet filled (e), tape must be automatically conveyed from the tape reel 12 (FIG. 2) (f). If the tape feed storage is already sufficiently filled with tape material (g), the tape channel (h) can be filled directly.
  • FIG. 6.2 shows in more detail how the automatic belt conveying (f) takes place. If the tape has not yet been inserted into the machine, a so-called pre-feed (i) must be initiated, ie the tape must be drawn in from the spool using the tape motor. This process will be shown in more detail with reference to Fig. 6.3. If the belt has already been drawn in to at least (FIG. 2) the third pair of conveyor rollers 17.3, the belt advance storage device 10.1 (FIG. 3) is filled (j). For this purpose, the auxiliary belt channel 7 (FIG. 2) is initially opened, thereby opening up the feed / outlet opening 20.1.
  • the belt is drawn in further by means of the first pair of conveyor rollers 17.1, and if the buffer separator 3 is actuated beforehand or simultaneously, the belt is introduced into the belt advance storage device 10.1 in the manner already described.
  • the monitoring sensor 14 (FIG. 2) signals the full or predetermined state of the memory by means of a control unit.
  • the tape channel 13 (FIG. 2) can then be filled (k), the pre-stored tape being used in the tape advance storage 10.1. It should be noted that when the tape channel is filled, any tape material present in the tape return memory 10.2 is first emptied and only then is the tape material used in the tape advance memory.
  • the pre-feed process (i) is illustrated in Fig. 6.3.
  • the tape When replacing a tape reel 12 (FIG. 2) or in the event of a tape break, etc., the tape must be re-inserted into the machine or into the belt conveyor system, the beginning of the tape up to the first pair of conveyor rollers 17.1 (FIG. 2) being manually or by means of a (not here )) are automatically drawn in.
  • any manual insertion only has to take place up to a pair of conveyor rollers 17.1, which is located in front of the conveyor belt storage 10.1 , and the storage itself does not have to be loaded in conventional designs. Thanks to the design of the belt conveyor device according to the invention, it is possible to have the further insertion, pre-storage, etc. run fully automatically.
  • the conveyor rollers 17.1 are active during the pre-feed process (1) and continue to pull in the belt until it reaches the third pair of conveyor rollers 17.3.
  • the auxiliary belt channel 7 and the belt feed channel 9 (FIG. 2) are closed (m) in order to guide the belt past the two buffers 10.1 and 10.2 and in the area of the tensioning device.
  • the belt motor that drives the corresponding conveyor rollers 17.1-17.3 must be active for this belt conveyor.
  • the first pair of conveyor rollers 17.1 no longer conveys the belt or it is in the released state (1 ').
  • the pre-storage process (j) is shown in more detail with reference to Fig. 6.4.
  • the belt motor is active (o) and drives the first pair of conveyor rollers 17.1 (Fig. 2), the rollers of which are to be (gripping the belt), i.e. are in the funding position (q).
  • the auxiliary tape channel 7 is open during pre-storage (p).
  • the end of the pre-storage is signaled by a signal from the monitoring sensor (14) (r). This signal serves as a control signal for switching off the belt conveyor by means of the first pair of conveyor rollers 17.1 and at the same time these are opened (s).
  • pre-storage of the strip material and the loading of the strip channel are coordinated or coordinated with one another and, according to the invention, are preferably carried out in a cyclical, regular sequence. I.e. there is at any time a quantity of strip material that is matched to the length of the strip channel in the strip advance storage unit 10.1 and pre-storage and loading of the strip channel take place in time-coordinated periods.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Claims (19)

  1. Dispositif de transport par bande comportant des éléments (17.1, 17.2) permettant le transport en avant et en arrière de la bande, l'élément permettant le transport en avant étant disposé dans le sens du transport en avant, derrière l'élément permettant le transport en arrière, et d'un système à deux chambres disposé entre les éléments de transport, destiné au stockage de la bande et présentant une unité de stockage pour l'avance de la bande (10.1) et une unité de stockage pour e recul de la bande (10.2) disposée dans le sens du transport en avant, avant l'unité de stockage pour l'avance de la bande, caractérisé en ce que l'unité de stockage pour l'avance de la bande (10.1) et l'unité de stockage pour le recul de la bande (10.2) présentent respectivement une ouverture d'entrée/ de sortie (20.1, 20.2) pour une boucle de la bande, en ce que, entre les deux ouvertures d'entrée/ de sortie (20.1, 20.2) est disposé un séparateur tampon (3) permettant de bloquer ou libérer le déroulement de la bande et en ce que pour le choix de l'unité de stockage, l'élément (17.1) permettant le transport en avant ou l'élément (17.2) permettant le transport en arrière peut être commandé avec le séparateur tampon (3) pour une action coordonnée.
  2. Dispositif de transport par bande selon la revendication 1, caractérisé en ce que dans le sens de transport en avant, un autre élément (17.3) permettant le transport en avant est prévu avant l'élément (17.2) permettant le transport en arrière.
  3. Dispositif de transport par bande selon la revendication 1 ou 2, caractérisé en ce que les éléments (17.1, 17.2, 17.3) permettant le transport en avant ou en arrière sont des paires de rouleaux de manutention commandables.
  4. Dispositif de transport par bande selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les deux unités de stockage de la bande (10.1, 10.2) sont respectivement conçues comme des chambres planes, sensiblement fermées avec respectivement une ouverture d'entrée/ de sortie (20.1, 20.2) pour la bande.
  5. Dispositif de transport par bande selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la chambre de l'unité de stockage pour l'avance de bande (10.1) présente au moins une structure en forme de canal et au moins une courbure en U.
  6. Dispositif de transport par bande selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les deux unités de stockage de la bande (10.1, 10.2) sont formées d'une construction fermée sous forme de panneaux-sandwich et en ce que les deux unités de stockage de la bande (10.1, 10.2) sont séparées par une paroi de séparation (25) située entre les panneaux.
  7. Dispositif de transport par bande selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'unité de stockage pour l'avance de la bande présente au moins un capteur de contrôle (14) pour déterminer la bande stockée.
  8. Dispositif de transport par bande selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'unité de stockage pour le recul de la bande (10.2) présente un capteur de contrôle pour vérifier la bande stockée provisoirement.
  9. Dispositif de transport par bande selon l'une quelconque des revendications 1 à 8, caractérisé en ce que dans la zone de l'ouverture d'entrée/ de sortie (20.1, 20.2), un canal de bande auxiliaire (7) mobile est prévu pour le guidage de la bande (1).
  10. Dispositif de transport par bande selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'unité de stockage pour l'avance de la bande (10.1) comporte au moins un agencement de transport (11) pour aider l'introduction de la bande.
  11. Dispositif de transport par bande selon l'une quelconque des revendications 1 à 10, caractérisé en ce que dans une section de serrage (24) entre l'élément (17.2) permettant le transport en arrière et l'autre élément (17.3) permettant le transport en avant, un canal mobile d'arrivée de la bande (9) est disposé.
  12. Procédé pour le fonctionnement d'un dispositif de transport par bande selon l'une quelconque des revendications 1 à 11, caractérisé en ce que pour remplir l'unité de stockage pour l'avance de la bande (10.1), le séparateur tampon (3) bloque le passage de la bande et en ce que la bande est transportée contre le séparateur tampon (3) par l'élément permettant le transport en avant (17.1), se courbe et est poussée sous forme de boucle dans l'ouverture d'entrée/ de sortie (20.1) de l'unité de stockage pour l'avance de la bande (10.1), en ce que lors du transport en arrière, le séparateur tampon bloque le passage de la bande et en ce que la bande est transportée contre le séparateur tampon (3) par l'élément permettant le transport en arrière (17.2), se courbe et est poussée sous forme de boucle dans l'ouverture d'entrée/ de sortie (20.2) de l'unité de stockage pour le recul de la bande (10.2).
  13. Procédé selon la revendication 12, caractérisé en ce que la bande à transporter est transportée en avant par l'autre élément (17.3) permettant le transport en avant tandis que le passage de la bande est libéré par le séparateur tampon (3) si bien que des boucles qui sont stockées dans l'unité de stockage pour l'avance de la bande (10.1) et/ ou dans l'unité de stockage pour le recul (10.2) sont extraites de ces dernières.
  14. Procédé selon la revendication 12 ou 13, caractérisé en ce que le stockage de la bande est commandé dans l'unité de stockage pour l'avance de la bande (10.1) par un capteur (14).
  15. Procédé selon l'une quelconque des revendications 12 à 14, caractérisé par les étapes suivantes du procédé :
    a. Stocker la bande par l'élément (17.1) permettant le transport en avant, dans l'unité de stockage pour l'avance de la bande ;
    b. Transporter la bande par l'autre élément (17.3) permettant le transport en avant ;
    c. Transporter la bande par l'élément (17.2) permettant le transport en arrière, dans l'unité de stockage pour le recul de la bande (10.2) ;
    d. Répéter les étapes a, b et c.
  16. Procédé selon la revendication 15, caractérisé en ce que les étapes c et a sont effectuées au moins temporairement de manière simultanée.
  17. Procédé selon l'une quelconque des revendications 12 à 16, caractérisé en ce que pour introduire la bande dans le dispositif, une amorce de bande est guidée automatiquement ou manuellement jusqu'à l'élément (17.1) permettant le transport en avant, en ce qu'ensuite l'amorce de bande est transportée par l'élément (17.1) permettant le transport en avant et est guidée par le canal de bande auxiliaire (7) et le canal d'arrivée de la bande (9) jusqu'à l'autre élément (17.3) permettant le transport en avant, le séparateur tampon (3) libérant le passage de la bande.
  18. Procédé selon l'une quelconque des revendications 12 à 17, caractérisé en ce que la quantité de la bande à stocker dans l'unité de stockage pour l'avance de la bande (10.1) est déterminée en fonction de la bande existant dans l'unité de stockage pour le recul de la bande (10.2).
  19. Procédé selon l'une quelconque des revendications 14 à 18, caractérisé en ce que le canal de bande auxiliaire (7) est basculé pour le remplissage de l'unité de stockage de la bande (10.1, 10.2).
EP92810248A 1991-04-30 1992-04-02 Méthode et dispositif pour délivrer un ruban à cercler Expired - Lifetime EP0524134B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1294/91 1991-04-30
CH129491 1991-04-30

Publications (3)

Publication Number Publication Date
EP0524134A2 EP0524134A2 (fr) 1993-01-20
EP0524134A3 EP0524134A3 (en) 1993-08-04
EP0524134B1 true EP0524134B1 (fr) 1996-12-27

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EP (1) EP0524134B1 (fr)
DE (1) DE59207751D1 (fr)

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DE59207751D1 (de) 1997-02-06
EP0524134A3 (en) 1993-08-04
US5236329A (en) 1993-08-17
EP0524134A2 (fr) 1993-01-20

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