EP2878541B1 - Edge protector feeder device in a strapping device - Google Patents

Description

• mit einer Anordnungseinrichtung für Kantenschutzmittel (17), welche das Kantenschutzmittel (17) vor dem Umreifungsvorgang am Packstück anordnet, wobei das Kantenschutzmittel (17) nach dem Umreifungsvorgang von einem Umreifungsmittel am Packstück gehalten ist,
• mit einem Vortrieb (10) für das Kantenschutzmittel (17), welcher ein Fördermittel (15) umfasst, welches das Kantenschutzmittel (17) durch einen Ausförderspalt (12) an die Anordnungseinrichtung übergibt
• und mit zwei Rollen und /oder Walzen (13/14) als Teil des Vortriebs (10), die den Ausförderspalt (12) bilden und zwischen denen das Kantenschutzmittel (17) zur Übergabe an die Anordnungseinrichtung hindurchgeführt ist, wobei
• dem Ausförderspalt (12) eine Steuereinrichtung (18) in Ausförderbewegung nachgeordnet ist,
• die Steuereinrichtung (18) einen Führungsspalt 19 aufweist, durch welchen das Kantenschutzmittel 17 zur Übergabe an die Anordnungseinrichtung hindurchgeführt ist.

The invention relates to a strapping device for packages,

• with an edge protection means (17) which places the edge protection means (17) on the package prior to the strapping operation, the edge protection means (17) being held by a strapping means on the package after the strapping operation,
• with a drive (10) for the edge protection means (17), which comprises a conveying means (15), which passes the edge protection means (17) through a Ausförderspalt (12) to the arrangement means
• and with two rollers and / or rollers (13/14) as part of the propulsion (10), which form the Ausförderspalt (12) and between which the edge protection means (17) is passed for transfer to the locating device, wherein
• the discharge gap (12) is followed by a control device (18) in Ausförderbewegung,
• the control device (18) has a guide gap 19 through which the edge protection means 17 is guided for transfer to the arrangement device.

Devices for strapping packages usually have a so-called packing table, on which rests a package to be strapped in the device. Arranged on the packing table is a guide frame which surrounds the package and within which a strapping means, such as a thermoplastic band, is guided around the package starting from a tensioning and closing device. Upon re-reaching the tensioning and closing device, the free end of the strap is held and the strap is partially retracted around the strap Packing stretched. The strap is pulled out of the guide frame. To make this possible, the guide frame on its sides facing the package suitable retaining means, such as opening flaps, brush attachments or the like. When tensioning the strapping around the package exerts this particular on the package edges high forces that can lead to damage to the package. Thus, it is known, for example, that the strapping material presses or cuts cardboard at the edges. Depending on the package type and quality, this is undesirable.

To avoid such damage, packages are provided with edge protectants before the strapping process. These are usually plate-like cardboard, which are applied to the edges to be protected and are held by the strap on the package.

The edge protection means are usually held in a magazine and passed from there via a drive to the assembly device, which positions the edge protection means on the package.

It is known from the prior art document which can not be assigned that removal tools engage one of the rear narrow edges of the plate-like edge protection means in the conveying direction and push it towards the arrangement device. It is also known that ribbons rest frictionally on one of the main surfaces of the edge protection means provided for attachment to the package, and the frictional engagement with movement of the band is sufficient to convey the edge protection means in the direction of the arrangement device.

From the previously unpublished DE 10 2012 016 659 , shows a generic device that addresses the aforementioned disadvantages of the prior art and proposes improved propulsion for an edge protection agent in a strapping device.

Starting from this unpublished prior art, the present invention proposes an improvement of DE 10 2012 016 659 in front. It has been shown that the cardboard used as edge protectants are sometimes subject to considerable differences in their quality. With perfect production of such cardboard edge protection means, these are almost completely flat, despite any embossed rabbet grooves, which cause a controlled buckling of the edge protection agent around the edge to be protected. However, fluctuating production conditions and edge protection agents from different supply sources as well as the storage conditions for edge protectants have a considerable influence on their quality, so that edge protectants are often curved or even twisted. This leads to an incorrect position transfer to the arrangement device, the holding means then can not absorb the edge protection means correctly.

With the removal of an ideal edge protection means for the arrangement device, the trajectory of the edge protection means follows when a straight line is removed, which lies in alignment with the conveying direction. A curved or twisted, in particular helically twisted edge protection deviates from this ideal trajectory, which has the aforementioned problems in the transfer to the assembly device result.

Object of the present invention is therefore to propose a strapping device with improved propulsion for an edge protection agent.

• die Steuereinrichtung einem Abweichen der Bewegungsbahn des Kantenschutzmittels von der Idealbewegungsbahn zwischen Ausförderspalt (12) und Anordnungseinrichtung entgegenwirkt, indem Sie durch Verlagerung des Führungsspaltes relativ zum Ausförderspalt eine Gegenbewegung des Kantenschutzmittels nach rechts oder links induziert,
• das Kantenschutzmittel bei Erreichen der Anordnungseinrichtung eine für die Übergabe korrekte Lage aufgrund der induzierten Gegenbewegung erreicht.

The invention is achieved by a drive with the features of claim 1, in particular with its characterizing features, according to which the guide gap is formed by two gap components arranged at a constant distance from one another,

• the control device counteracts a deviation of the movement path of the edge protection means from the ideal movement path between the discharge gap (12) and the arrangement device, by inducing a counter movement of the edge protection means to the right or left by displacing the guide gap relative to the discharge gap,
• the edge protection means reaches a correct position for the transfer upon reaching the arrangement means due to the induced counter-movement.

The essential advantage of the invention is to be seen in that the control device can influence the direction of movement and the movement path of the edge protection means. Although, in the case of a curvature of the edge protection means directed, for example, transversely to the discharge movement, a curved trajectory inevitably follows. By means of the control device, however, a countermovement can be imposed on the edge protection means on exiting the discharge gap. If, for example, a curvature of movement curved to the left from the curvature of the edge protection means emerges from the delivery gap, the control device can impose a counter-movement directed to the right, so that both movements compensate each other over the movement path. In this way, it is ensured that the edge protection agent is transferred at the end of its Ausförderbewegung in the correct position to the assembly device. In this case, the movement path - influenced by the control device and the curvature of the edge protection means - run quite curved.

By compensating the control device is ensured in any case that a position-appropriate transfer takes place.

Out WO96 / 23610 A1 a strapping device is known in which a control roller is arranged downstream of an outlet gap and the edge protection means imposes a curvature in only one direction.

US 5,899,046 B shows a strapping apparatus in which a band-like edge protection agent is withdrawn from a supply roll to be fed by means of a deflection roller to the package.

In order to influence the discharge direction of the edge protection means of the strapping device according to the invention, it is provided that the gap-forming gap components are movable transversely to the discharge movement, in particular that the split components are pivotable transversely to the conveying direction.

A particularly simple adjustment of the control device is ensured by the transverse movement of the gap components is induced by a control spindle.

In order to ensure a friction-minimized discharge of the edge protection agent through the guide gap, it is provided that guide wheels, guide rollers and / or guide rollers are arranged in the guide gap of the gap components. The particular advantage of this is that the edge protection means rolls on the wheels, rollers or rollers minimized friction.

It may further be provided that the rollers and / or rollers forming the Ausförderspalt form the control device itself.

Fig. 1:

eine Teilansicht eines erfindungsgemäßen Vortriebs mit Kantenschutzmittel in perspektivischer Ansicht auf den von Walzen gebildeten Ausförderspalt,

Fig. 2:

die Darstellung gemäß Fig. 1 mit Kantenschutzmittel unter Weglassen der den Ausförderspalt bildenden Walzen;

Fig. 3:

die Darstellung gemäß Fig. 1 ohne Kantenschutzmittel mit Steuereinrichtung in Neutralstellung;

Fig. 4:

die Darstellung gemäß Fig. 1 mit Steuereinrichtung in einer ersten Steuerstellung;

Fig. 5:

die Darstellung gemäß Fig. 3 mit Steuereinrichtung in einer zweiten Steuerstellung.

Further advantages of the invention and a better understanding follow from the following description of an embodiment. Show it:

Fig. 1:

a partial view of a propulsion according to the invention with edge protection means in a perspective view of the Ausförderspalt formed by rollers,

Fig. 2:

the representation according to Fig. 1 with edge protection means omitting the rollers forming the Ausförderspalt;

3:

the representation according to Fig. 1 without edge protection with control device in neutral position;

4:

the representation according to Fig. 1 with control device in a first control position;

Fig. 5:

the representation according to Fig. 3 with control device in a second control position.

In the figures, a drive according to the invention is provided overall with the reference numeral 10 and shown as a partial view of the Ausförderspalt.

The propulsion system 10 comprises a base 11, which is part of a magazine, not shown, and on which two rolls 13 and 14 forming a discharge gap 12 are arranged. The first roller 13 is coupled to a drive belt 15 and is rotated by this drive belt 15 in rotation. The second roller 14 is designed without drive in the present embodiment. Friction increasing means in the form of rubber rings 16 are arranged on the rollers 13, 14.

The drive belt 15 also serves as a conveying means, on which the edge protection means provided overall with the reference numeral 17 rests with a narrow side and is moved in the conveying direction to the rollers 13 and 14. Upon reaching the Ausförderspaltes 12, the rollers 13 and 14 engage the edge protection means 17 and take over the targeted Ausförderung to an arrangement device, not shown.

In order to influence the movement path of the edge protection means 17 or the discharge direction, a control device is arranged downstream of the discharge gap 12 in the discharge movement. This carries the reference numeral 18. It initially comprises two guide gaps 19 forming a gap components 20 which are arranged at a constant distance from one another via a connecting leg 21. The split members 20, which are connected to one another via the connecting leg 21, are fastened in a pivotable manner to a mounting plate 23 via a bolt 22 or a comparatively acting fastening means, wherein the bolt 22 forms the pivot axis in geometric terms as well as objectively.

A spindle drive in the form of a control spindle 24 comprises a spindle axis 25 with a spindle wheel 26 at its free end and is rotatably anchored in the mounting plate 23.

On the spindle axis 25, a control member 27 is arranged vertically movable by rotation of the spindle axis 25. The control member 27 engages in a substantially vertically directed slot 28 of a control leg of a split member 20 a. By rotating the spindle axis 25 by means of the spindle wheel 26 and thereby induced vertical movement of the control member 27, the latter pushes the control arm 29 upwards or downwards. Here, the gap components 20 in the direction of a first maximum deflection (see Fig. 4 ) or in the direction of a second maximum deflection (see Fig. 5 ) pivots. Due to the change in position of the guide gap 19 forming gap components relative to the Ausförderspalt 12, the edge protection means 17 is deflected during its movement through the Ausförderspalt 12 and the guide gap 19 therethrough.

If an edge protection means 17 is carried out, which has a curvature with a curvature axis which is directed vertically to the discharge direction and parallel to the Ausförderspalt 12, so this curvature induces a curved trajectory of the edge protection means 17 when leaving the Ausförderspaltes 12. Too strong deviation from the Idealbewegungsbahn, which is provided for the transfer to the arrangement device, has the consequence that the transfer to the arrangement device fails.

The control device 18 makes it possible via a relative displacement of the guide gap 19 with respect to the Ausförderspalt 12 a Induce backlash. As a result of this countermovement, the edge protection means 17 reaches a position which is correct for the transfer upon reaching the arrangement device.

If one imagines the ideal trajectory as straight line between Ausförderspalt 12 and arrangement means and deviates imposed by the curvature of the edge protection means 17 trajectory, for example, to the right of the ideal trajectory, it can be induced via the control device 18, a counter-movement to the left compensates for the deviation from the ideal trajectory.

Deviations in the embodiment of the invention are conceivable. In particular, it is possible that the control device 18 is not pivoted about an axis, but is moved linearly. Also, the movement of the control device 18 induced by the control spindle 24 can be accomplished via an engagement of gear and rack and a worm drive.

A manual movement such as a motorized movement of the control spindle 24 is conceivable, wherein the manual movement is preferred.

LIST OF REFERENCE NUMBERS

10

jacking

11

Base

12

Ausförderspalt

13

first roller

14

second roller

15

belts

16

rubber ring

17

Edge protection means

18

control device

19

guide gap

20

gap components

21

connecting leg

22

bolts

23

mounting plate

24

control spindle

25

spindle axis

26

spindle wheel

27

control member

28

Long hole

29

control arm

Claims (5)

1. Strapping apparatus for packages,

   - having an arrangement device for edge protectors (17), said device arranging the edge protector (17) on the package prior to the strapping operation, wherein the edge protector (17) is retained on the package by a strapping means following the strapping operation,

   - having an advancement mechanism (10) for the edge protector (17), said mechanism comprising a conveying means (15) which transfers the edge protector (17) to the arrangement device through a delivery gap (12),

   - and having two rollers (13/14) as part of the advancement mechanism (10), said rollers forming the delivery gap (12) and having the edge protector (17) guided through between them for transfer to the arrangement device, wherein

   - a control device (18) is arranged downstream, as seen in the direction of delivery movement, of the delivery gap (12),

   - and the control device (18) has a guidance gap (19), through which the edge protector (17) is guided for transfer to the arrangement device,

   characterized in that

   - the guidance gap (19) is formed by two gap components (20) arranged at a constant distance from one another,

   - the control device (18) counteracts any deviation of the movement path of the edge protector (17) from the ideal movement path between the delivery gap (12) and arrangement device by using displacement of the guidance gap (19) relative to the delivery gap (12) to induce an opposing movement of the edge protector (17) to the right or left,

   - and, upon reaching the arrangement device, the edge protector (17), on account of the induced opposing movement, achieves a position which is correct for transfer purposes.
2. Strapping apparatus according to Claim 1, characterized in that the gap-forming gap components (20) can be moved transversely to the delivery movement.
3. Strapping apparatus according to Claim 1, characterized in that the gap components (20) can be pivoted transversely to the conveying direction.
4. Strapping apparatus according to Claim 2 or 3, characterized in that the transverse movement of the gap components (20) is induced by a control spindle (24).
5. Strapping apparatus according to one of Claims 1 to 4, characterized in that guidance wheels and/or guidance rollers are arranged in the guidance gap (19) formed by the gap components (20).

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