EP1382531A1 - Apparatus for strapping goods with a strapping band - Google Patents

Abstract

The machine for fitting a strap (5) longitudinally on a package comprises rollers (9) mounted on swiveling arms (8). These draw the strap off a reel (4) and clamping jaws (12) hold it in position.

Description

The invention relates to a device for strapping, in particular for Longitudinal strapping of packaged goods with a strapping, comprising a Strapping tape roll, from the strapping to be processed under formation of a band storage device for a subsequent strapping process becomes.

Such a device is known for example from DE 200 07 232 U1. at This device is the packaged goods to be strapped, for example a catalog or Stack of magazines, about an unspecified Provisioning device parked on the device table. In or on A strapping roll is provided on the device table, of which the Strapping into a band storage device in which it is guided in a meandering manner, is withdrawn and runs into a shooting device, by means of which it is in a channel-like belt guide frame encompassing the packaged goods becomes. The front free end of the band is caught again and into one Welding device performed, where it is after reclamping the packaged goods Strapping is removed from the strap guide frame, is welded, after which it is cut off. With the shooting process from the Strapping tape roll the strapping pulled off and the tape storage continuously filled, so that always enough unwrapped strapping in the Tape storage is available for a bullet process.

Known strapping devices have an automatic tape feed, that is, the strapping is automatically removed from the strapping roll deducted and conveyed into the storage, there meandering. This is usually a device in the memory for recording the weight of the Storage bands are provided, which is often designed as a seesaw and via which the tape feed is controlled. If the tape supply is too low, the Use suitable switching means to rock the tape feed from the tape roll tape is automatically fed into the memory. When a predetermined one is reached Filling level and thus a corresponding belt weight, the rocker tilts Switching means switches off the tape feed. Depending on the rocker position, the Belt feed controlled. As a rule, there are three to four times the length of the tape of a strapping process in memory. The equipment effort for this Known band retraction is remarkably high, the rocker is malfunctioning possible, so that sometimes the entire move-in operation does not or not works properly.

The invention is based on the problem of specifying a device that has a simply constructed tape feed mechanism.

To solve this problem in a device of the type mentioned provided according to the invention that a for pulling the strapping Movable band driver is provided, which from a first to a second Position is movable with the strapping, and that a Strapping strap locking means on one of the strap driver downstream point is provided.

The strapping device according to the invention sees only one between two Positions movable belt driver before, when moving from the first into the second position the tape that is in the area between the Point of attack of the band driver and the shooting device over one suitable holding means is held during its movement at least over takes part of the length between the first and the second position, so that the strapping is inevitably given due to the other Lock is unwound from the roll. The tape will be during this Movement over the belt driver into the belt storage. Compared to the previously known automatic feeder is the invention proposed trigger mechanism using only one Movable belt driver designed much easier.

In a further development of the inventive concept it can be provided that the Conveyor belt as a tensioning device for goods guided around the packaged goods Strapping with promotion of the tensioned strap length in the Tape storage before removing the strapping from the Strapping tape roll is used, for which purpose an upstream of the tape driver preferably second roller means close to the roller for locking the Strapping is provided. According to this embodiment of the invention comes not only the tape driver but a tape feed function at the same time a clamping function, it has a double function and replaces it otherwise usual back tensioning device. About what is provided according to the invention second holding means the strapping is fixed near the roll after the Strapping in a band guide frame surrounding the packaged goods was shot. For this, after it is in the Welding device was caught and locked there, removed so that it can be stretched around the packaged goods. This is now done using the Belt driver, which moves from the first position and the band around the packaged goods is stretched. The holding device downstream of it is opened at this time so that the tape can be retrieved while the holding means close to the roll in the belt driver, the belt locked. It only closes when a predetermined voltage is reached downstream holding device, the upstream holding device close to the roll opens, so that the strapping continues on the path of movement to the second Position can be pulled off the tape roll. This Invention design thus makes it possible, in addition to the complex structure known tape feed control also on a separate tensioning device to dispense with, since both functions of the intended according to the invention Band drivers are carried out. Incidentally, with the strap driver according to the invention the strapping with any Tension can be tensioned around the packaged goods as the belt driver pulls the belt tensions due to its longitudinal movement and ultimately only the tension depends on how far you move the conveyor along its path. This is also a considerable advantage over previously used Tensioning devices, either tensioning rollers or Use tension clamps. These often do not allow a higher one Generate tape tension, because they slip on the tape and the like.

According to the invention, the length of the movement of the belt driver can be dimensioned between the first and the second position such that straight as much strapping is fed into the band storage as for one subsequent strapping process is required to ensure that the tape storage is always filled with the tape length actually required and not too little or too much tape is fed into the memory. This is another one considerable advantage over the prior art, where usually three to there are four strap lengths required for a strapping process in the memory are. There is often a twisting of the tape in the Memory, which is disadvantageous for the subsequent injection process. If the Strapping device, for example, stands overnight, takes the meandering shape discarded tape often has this meandering shape, which means it has molded one in Arches or kinks that prevent shooting. By just there is a maximum of one tape length in memory, these disadvantages will also largely avoided. An advantageous development of this The concept of the invention provides that the length of movement of the belt driver is adjustable between the first and the second position, which then inevitably shorten or lengthen the tape length in the memory leaves. As a result, the device can easily adapt to the geometry of a new one packaged goods to be gripped and still be ensured, that only the tape length actually required is fed into the memory.

According to the invention, the belt driver can be designed as a pivot lever, which is expediently pivotable about the axis of rotation of the strapping roll is. A suitable drive means, e.g. in the form of an electric motor or the like provided to the lever between the two positions move. As an alternative to the swivel lever, which is a circular arc Performs movement, it is also conceivable to move along a straight line to provide movable carriers, e.g. a rail-guided Driver element or the like. Such a rail-guided Driver element can of course also along a curved Trajectory be guided, so that even through such Driver training is a curved path of movement between the two Positions as it is given with a swivel lever can be realized.

The first and optionally the second holding means are expediently as Clamping means formed, for example as opposite one another Clamping jaws between which the strapping is guided. This Clamping devices can be operated electrically, pneumatically and hydraulically.

The pivot lever can be designed as a one-armed pivot lever based on the position of the strapping is moved laterally next to this and a suitable driver element, which protrudes from the pivot lever, the Takes band. However, it is particularly useful for reasons of stability, if the band driver designed as a swivel lever two on the side Strapping roll movable swivel arms, which on a Strapping band attacking connecting portion is connected.

Depending on the configuration of the device, clock cycles of different lengths can be used be worked. That means the strapping process can be very quick run one after the other or with longer intervals between them. Act it are slow-moving devices, so they are longer clock cycles given, it is easily possible to make the band driver the same as him is executed from the second position back to the first position move back before the strapping is removed from the strap storage becomes. With a faster working device, there can now be the problem that the band driver cannot yet be returned to the first position before the strapping comes out of the band storage due to a Is deducted. In this case, that would result from the Storage strapping on which is still in the withdrawal path push the belt carrier located. This would make the bullet process disturbed because the strapping is not completely removed from the memory can be. This is particularly the case with faster clocked devices The problem to be solved is to further develop the inventive idea provided that the tape driver along or parallel to the axis of rotation of the Strapping tape roll at least to carry out the return movement in the first Position is displaceable. This embodiment of the invention therefore provides that Belt driver or the driver element that actually on Band attacks during the movement, from the withdrawal path of the Strapping when moved out of memory by moving the band driver is shifted slightly to the side, so that de facto the Strapping band attacking the driver section in any case laterally next to the Band is positioned and returned in this position. One now out the tape pulled is stored on the tape driver or pulled over its driver section, this hindered the tape take-off Not. If the conveyor is a two swivel arms having pivoting lever, it is useful if the Connection section between the pivot arms is in two parts and at least one of the swivel arms along the swivel axis or parallel to this (if this swivel lever cannot be swiveled around the roll rotation axis is) is displaceable. That means there is only one swivel lever with the am Band attacking connecting section moved to the side. However, since in the Adjust the tape pulled from the tape roll onto the roll body from the left going to the right, so on different ones Positions on the connecting section is performed, it is useful if both Swivel arms can be moved laterally, as the band depends on Roll position is performed on one or the other connecting section part.

On the conveyor, if necessary, the connecting section or generally forming the driver element is expediently a role or a roller is provided on which the strapping to be drawn off runs. Is the Connection section divided into two, of course, two such roles or rollers provided.

In the tape storage itself are useful holding elements for holding the strapping inserted by the movement of the strap driver provided that can be designed for example as brushes.

Fig. 1

eine Prinzipskizze einer erfindungsgemäßen Vorrichtung nach dem Bandeinschuss in einer Seitenansicht,

Fig. 2

die Vorrichtung aus Fig. 1 in einer um 90° gedrehten Ansicht,

Fig. 3

die Vorrichtung aus Fig. 1 nach dem Spannen und Verschweißen des eingeschossenen Umreifungsbandes um das Packgut,

Fig. 4

die Vorrichtung aus Fig. 3 in einer um 90° gedrehten Ansicht,

Fig. 5

die Vorrichtung aus Fig. 3 mit in die zweite Stellung geführtem Bandmitnehmer,

Fig. 6

die Vorrichtung aus Fig. 5 in einer um 90° gedrehten Ansicht,

Fig. 7

die Vorrichtung aus Fig. 5 nach Rückführen des Bandmitnehmers, und

Fig. 8

die Vorrichtung aus Fig. 7 in einer um 90° gedrehten Ansicht.

Further advantages, features and details of the invention result from the exemplary embodiment described below and from the drawings. Show:

Fig. 1

2 shows a schematic diagram of a device according to the invention after the tape is injected in a side view,

Fig. 2

1 in a view rotated by 90 °,

Fig. 3

1 after tensioning and welding the strapped tape around the packaged goods,

Fig. 4

3 in a view rotated by 90 °,

Fig. 5

3 with the band driver guided into the second position,

Fig. 6

5 in a view rotated by 90 °,

Fig. 7

5 after returning the tape driver, and

Fig. 8

the device of FIG. 7 in a view rotated by 90 °.

1, 3, 5 and 7 show the device according to the invention as a schematic diagram as a sectional view, while FIGS. 2, 4, 6 and 8 a view rotated by 90 ° of the relevant uncut device components.

1 shows a device 1 according to the invention comprising a Device table 2 on which a tape guide frame 3 is arranged. In or on the device table 2, a strapping roll 4 is provided, which around the Axis A is rotatable. This strapping roll 4 becomes strapping 5 settled. This strapping 5 is shown in FIG. 1 in the Belt guide frame 3 via a not shown shooting device injected. The free end is caught and also not closer to one shown welding device performed. The strapped tape then around a packaged good, e.g. a stack of catalogs or newspapers excited about what it is welded and later cut off. These are basic operations well known in the prior art, there is no need to go into more detail because it is not important in the context of the invention.

As shown in FIG. 1, there is a strap driver 6 in the area of the strapping strap Form of a pivot lever 7 with two pivot arms 8, which have a two-part connecting section 9 consisting of two rollers 10 with each other are connected. The pivot lever 7 or its two Swivel arms 8 are about the same axis of rotation as the strapping roll 4 rotatable, which will be discussed below. The movement of the Swivel lever, between a first position shown in Fig. 1 and a 5 second position is movable, can be via an electric motor done, is also a pneumatically or hydraulically controlled lever movement conceivable.

The band driver 6 is preceded by a clamping means 11, for. B. two Clamping jaws, between which the strapping 5 is guided. Furthermore is a further clamping means 12 connected downstream of the band driver 6, likewise z. B. consisting of two jaws, connected downstream. Both clamping means 11, 12 can be operated separately electrically, pneumatically or hydraulically. she serve to clamp the strapping between them, each after what cycle the device is in.

Fig. 1 shows, as described, the situation after the shooting in Strapping 5 in the strap guide frame. The band driver 6 is located in its first position, in which it does not attack the strapping 5.

Fig. 3 now shows the situation in which the strapping 5 from which itself opening tape guide frame 3 taken and around that shown in Fig. 3 Packaged goods 13 was tensioned. The back tensioning takes place in that for example, immediately after the straight, taut course of the Strapping 5 between the two clamping means 11 and 12, what about a Suitable sensor technology can take place, the roller means 11 closed is and the strapping 5 is locked there. That is, in the in Fig. 1st shown position after shooting in and catching the strapping the clamping means 11 closed. The belt driver 6 now moves as shown in FIG Direction of arrow B. After the clamping means 12 is open, it pulls the loose around the packaged goods 13 strapping, this stretches it around the Packaged goods 13 and at the same time leads them into the band store. Depending on how far the belt driver 6 is moved here, the tension more or less be strongly adjusted. Sufficient tension is reached, which is also via a suitable sensor system that detects the tension state of the belt on a the section downstream of the clamping means 12 can be detected, monitored, the band is clamped in the welding device (not shown) and locked while the clamping means 12 is closed at the same time. The Band driver 6 can now remain in this position until, for example strapping is welded and cut to subsequently the Continue filling the tank, for which the clamping means 11 is to be opened. Besides there is also the possibility of immediately after the clamping means 12 has been closed to open the clamping means 11 and to move the belt driver 6 further. There the band is fixed by means of the clamping means 12, is by this Swiveling strapping from the then rotating Strapping tape roll 4 removed. The pivot lever 7 moves into the in Fig. 5 shown second position, which clearly shows that a corresponding Tape length was subtracted. The strapped tape is over Appropriate guide rollers 14 out and in a tape store 15th introduced where it is in particular in the form of holding elements, not shown is held in place by holding brushes. From this tape storage 15 it is during the Deduction, which will be discussed below. in the Tape storage 15 is then exactly one necessary for shooting Band length, formed from tensioned and unwound band.

After reaching the second position shown in FIG. 5, the pivot lever 7 returned to the first position, see Fig. 7, the withdrawn Strapping tape remains in the tape storage 15 Clamping means 12 opened, so that the strapping 15 from the memory can be conveyed through the clamping means 12. The clamping means 11 can be closed to lock the strapping there. After the tape length in tape storage 15 is exactly the same as the Shoot-in corresponds to the required tape length, arises after shoot-in again the state shown in Fig. 1, the strapping 5 runs in Essentially rectilinear between the clamping means 11 and 12, what about a Sensor or the like can be detected. If the sensor gives this signal, so the clamping means 11 (if not already done) at the latest closed, after which the re-tensioning process and later the tape removal process expires again for filling the memory. Of course there is the possibility that the Tensioning back into the tape store 15 the tape length over a to record suitable sensors. Depending on the length recorded via this then in a suitable control unit how much tape is still recorded by the The tape roll must be removed so that the accumulator is filled with the required tape length. The stripped tape length can be recorded using another sensor system (e.g. by detecting the actual tape length or the path of movement of the Belt driver, which is also a measure of the strip length drawn off) and the driver movement is controlled accordingly depending on the detection until the correct length has been fed into the store. That is, the Carrier movement can vary depending on how much tape is actually being pulled is controlled accordingly. This can make minor changes recorded with regard to the strip length returned during re-tensioning and be compensated so that the required tape length is always in the memory located.

The sequence shown in the figures reflects the situation that the Swivel lever 7 from the second position (FIG. 5) to the first position (FIG. 7) can be returned before the shooting starts and Strapping is withdrawn from the band store 15. This is slow clocked devices easily possible. With faster clocked However, devices can start the shooting process before the pivot lever 7 has reached the first position shown in FIG. 7 again. In In this case, the connecting section 9 would pull the free tape out of the Tape storage 15 hinder, that is, quickly from the tape storage 15th stripped strap would abut the connecting section 9. To avoid this, as shown in FIG. 6, the quasi two-part Swivel lever 7 laterally displaceable. The two swivel arms 8 can be along the axis guide 16, as indicated by the arrows C, are laterally offset, so that the two rollers 10 are no longer in the path of movement of the strapping 15 to be removed. Since both rollers 10 from the An unobstructed tape take-off is possible possible in any case, no matter where the strapping on the Strapping tape roll is wound from left to right, runs. To The swivel arms 8 reach the first position shown in FIG. 7 pushed back as shown by arrows D in Fig. 8, so that the connecting section 9 closes again and for the subsequent one Stripping can attack the strapping.

Instead of the embodiment shown in the figures with a pivot lever it is also conceivable to place one on a straight or curved guide Movable band driver, which is quasi guided on a slide use. This also allows the strapping to be easily removed and be inserted into the tape storage.

Claims (13)

Device for strapping, in particular for longitudinally strapping packaged goods with a strapping, comprising a strapping roll, from which strapping to be processed is pulled off to form a strap storage device for a subsequent strapping process, characterized in that a movable strap driver (6) is used to pull off the strapping (5). Is provided, which can be moved from a first to a second position while taking the strapping (5) with it, and that a holding means (12) locking the strapping (5) is provided at a point downstream of the strap driver (6). Apparatus according to claim 1, characterized in that the strap driver (6) acts as a tensioning device for strapping tape (5) guided around the packaged goods (13) while conveying the tensioned strap length into the strap storage device (15) before the strapping strap (5) is pulled off the strap (4) is used for which a second holding means (11), which is arranged upstream of the strap driver (6) and is preferably close to the roll, is provided for locking the strapping strap (5). Apparatus according to claim 1 or 2, characterized in that the length of the movement of the strap driver (6) between the first and the second position is such that just as much strapping tape (5) is fed into the memory as is required for a subsequent strapping process becomes. Device according to one of the preceding claims, characterized in that the length of movement of the belt driver is adjustable or variable. Device according to one of the preceding claims, characterized in that the belt driver (6) is a pivot lever (7). Apparatus according to claim 5, characterized in that the pivot lever (7) is pivotable about the axis of rotation of the strapping roll (4). Device according to one of the preceding claims, characterized in that the first and optionally the second holding means are designed as clamping means (11, 12). Device after. one of the preceding claims, characterized in that the strap driver (6) designed as a pivot lever (7) has two pivot arms (8) which can be moved laterally to the strapping roller (4) and which are connected via a connecting section (9) engaging on the strapping strap (5) , Device according to one of the preceding claims, characterized in that the strap driver (6) can be displaced in the first position along or parallel to the axis of rotation of the strapping roller (4) at least for carrying out the return movement. Apparatus according to claim 8 and 9, characterized in that the connecting section (9) in two parts and at least one of the swivel arms (8) is displaceable along the swivel axis. Device according to one of the preceding claims, characterized in that a roll or roller (10) is provided on the strap driver (6), possibly forming the connecting section (9), on which the strapping strap (5) to be removed runs. Device according to one of the preceding claims, characterized in that holding elements for holding the strapping band (5) introduced by the movement of the band driver (6) are provided in the band store (15). Apparatus according to claim 12, characterized in that brushes are provided as holding means.

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