EP2837590A1 - Sheet braking device, installation to provide sheets, and sheet braking apparatus - Google Patents

Abstract

The invention relates to a sheet brake device for braking in a transport direction (2) transported sheets (3). The sheet braking device comprises at least one holder (25), at least one sheet guide unit (23) arranged adjacent to the at least one holder (25) and at least one sheet brake device (26) provided by the at least one holder (25) disposed adjacent to the at least one sheet guiding unit (23) comprises at least one first sheet brake body (28) having a first braking portion (32) for braking engagement with the sheet (3) to be braked , and at least one second sheet braking body (29) having a second braking portion (33) for braking engagement with the sheet (3) to be braked. The at least one arc-brake device (26) is designed such that the first braking region (32) and the second brake region (33) when braking in the transport direction (2) spaced from each other on the sheet to be braked (3) attack.

Description

The invention relates to a sheet braking device for braking transported in a direction of transport sheets, especially corrugated sheets. Furthermore, the invention is directed to a system for providing sheets, in particular corrugated sheets, with at least one such sheet braking device. The invention also relates to a sheet brake device, in particular a corrugated sheet brake device, for use in a sheet braking device.

From the prior art arc-braking devices are known by prior public use, which are designed for example as spring plates. The braking effect or braking force of such sheet braking devices is often unsatisfactory. The prior art bow braking devices are also often formed by brushes having bristles. The bristles are currently generally fiberglass bristles. These are exposed to high wear.

The invention has for its object to provide a sheet brake device, on the one hand has an extremely high braking or braking force and on the other hand is particularly resistant to wear. A system with at least one corresponding arc brake device should also be created. Furthermore, a bow-brake device is to be supplied, which is extremely resistant to wear and has a high braking effect or braking force.

This object is achieved by the features specified in the independent claims 1, 13 and 15 features. The core of the invention is that the at least one sheet braking device comprises at least a first sheet brake body and at least a second sheet brake body braking together when braking the braked sheet at spaced apart in the transport direction arc points or arc areas on the sheet to be braked attack. This increased braking range compared to conventional bow-brake devices, a stronger braking of the bows is possible.

It is advantageous if several, d. H. more than one, sheet braking devices are arranged one behind the other in the transport direction.

It is expedient if the at least one sheet brake device presses the sheet to be braked against the sheet guide unit. The braking takes place by friction.

It is expedient if the at least one sheet guiding unit is formed by at least one table, at least one roller conveyor, at least one band, at least one belt or the like.

It is advantageous if in the sheet brake device, the distance between the at least one holder and the at least one sheet guide unit is adjustable so that, for example, the sheet brake device for braking sheets with different thickness can be used or so Braking force of the at least one sheet brake device is easily changed. It is advantageous if the at least one sheet brake device is additionally or alternatively mounted to change the braking force displaceable or pivotable to the sheet to be braked at the at least one holder. Alternatively, that is at least a bow-brake device rigidly attached to the at least one holder.

It is advantageous if the braking region is a free end region of the respective arc brake body.

It is expedient if the at least one first sheet brake body and / or the at least one second sheet brake body extends over at least 50%, more preferably over at least 70%, more preferably over 90%, of the width of the sheet to be braked transversely to the transport direction ,

It is expedient if the width of the at least one first sheet braking body and of the at least one second sheet braking body lies, at least in its braking areas, between 10 mm and 40 mm, more preferably between 15 mm and 35 mm. Preferably, the width is constant and equal. Alternatively, this changes at least regionally.

It is preferred that the at least one first arc brake body and / or the at least one second arc brake body is / are formed of a metallic material, such as steel.

It is possible for the at least one sheet brake device to have, in addition to the at least one first sheet brake body and the at least one second sheet brake body, at least one further, such as third, fourth, fifth, etc. sheet brake body. The at least one further sheet brake body preferably has a different length than the at least one first and second sheet brake body. He is otherwise appropriate the at least one first or second brake body is formed. In its operative state, it acts on at least one further arc point on the sheet to be braked, which is spaced apart in the transport direction from the other points of application of the first and second sheet brake bodies.

Preferably, the attack points or braking points respectively generated by the first and second arc brake bodies are linear on the sheet to be braked. The at least one first arc brake body preferably forms a first linear attack point or brake point on the arc to be braked, while the at least one second arc brake body advantageously forms a second linear attack point or brake point on the arc to be braked. The at least one sheet-braking device thus generates at least two spaced apart in the transport direction attack points or braking points on the sheet to be braked, which are preferably linear, preferably parallel to each other and preferably extend transversely to the transport direction.

In a system for providing sheets, the sheets can be transported or arranged in an especially scalable manner by means of the at least one sheet braking device, which enables particularly good stacking of the sheets.

The at least one cross-cutting unit according to claim 13 preferably has at least one knife. A non-contact cross-cutting unit can be used alternatively.

It is useful if the at least one sheet stacking device has a height-adjustable stacking table for receiving the sheets to be stacked.

Further advantageous embodiments of the invention are specified in the subclaims.

The embodiment according to the dependent claim 2 leads to a bow brake device that is particularly good and easy to handle. The sheet brake body are combined to form a unit or a package. It is advantageous if the at least one sheet brake device is held or supported by its carrier on the at least one holder.

The specified in the dependent claim 3 embodiment enables a functionally reliable system of the first and second braking areas on the sheet to be braked in the transport direction spaced arc points or arc areas present. The first and second lengths preferably originate respectively from the associated common carrier.

It is advantageous if the length of the at least one first sheet brake body is between 40% and 80%, more preferably between 50% and 70%, of the length of the at least one second sheet brake body.

It is advantageous if the at least one second sheet brake body has a length which is between 200 mm and 700 mm, more preferably between 280 mm and 500 mm.

The arrangement according to the dependent claim 4 allows a particularly strong deceleration of the bow to be braked.

The sheet brake device according to the dependent claim 5 is extremely compact and space-saving in the inoperative state or in the non-braking state of the sheet brake body.

The embodiment according to the dependent claim 6 leads to a space-saving or compact arrangement. Alternatively, the at least one first sheet brake body and the at least one second sheet brake body are spaced in the transport direction, but arranged adjacent to each other.

According to the dependent claim 7, the at least one first sheet brake body and / or the at least one second sheet brake body are / are elongated. More preferably, the at least one first sheet brake body and / or the at least one second sheet brake body are / are designed like lamellas or ridges. It is advantageous if the at least one first sheet brake body and / or the at least one second sheet brake body each extend / extend in an elongate manner from the common carrier to the sheet to be braked. A plate-like configuration is alternatively possible.

According to the dependent claim 8, the at least one first arc brake body and / or the at least one second arc brake body are / are resilient, so that there is a spring effect or spring force can be generated. It is preferred that the at least one first sheet brake body and / or the at least one second sheet brake body is made of spring steel.

According to the dependent claim 9, the at least one first arc brake body and the at least one second arc brake body are at least partially deflected relative to each other. It is advantageous if, for example, the degree of relative deflection to one another depends on the contact pressure of the sheet brake body against the sheet to be braked. Conveniently, the degree of relative deflection is also dependent on the respective longitudinal extent of the sheet brake body in the direction of the bow to be braked. The at least one first arc brake body and the at least one second arc brake body are preferably deflectable relative to one another between an inoperative non-braking position and an effective braking position. Preferably, the non-braking position is an undeflected rest position, while in the braking position, the at least one first and / or second arc brake body is deflected relative to the rest position. Conveniently, the at least one first sheet brake body and / or the at least one second sheet brake body endeavor to return to their rest position.

The sheet-brake body according to the dependent claim 10 is / are extremely easy to manufacture, for example by punching.

According to the dependent claim 11, the at least one first arc brake body and the at least one second arc brake body on different surface moments of inertia and / or resistance moments. They thus have a different resistance to stress, in particular to bending. So you have a different stability, especially against buckling or bending. Alternatively, the at least one first sheet brake body and the at least one second Arc brake body identical area moments of inertia and / or resistance moments.

The embodiment according to the dependent claim 12 leads to a sheet brake device that is extremely reliable and has a particularly high braking effect.

It is advantageous if the first braking areas of the first sheet brake bodies are adjacent but laterally spaced from one another. Furthermore, it is expedient if the second braking areas of the second sheet brake bodies are adjacent but laterally spaced from one another. Conveniently, the first sheet brake body are identical to each other. It is advantageous if the second arc brake body are formed identical to each other.

It is advantageous if the first sheet brake bodies are deformable or deflectable independently of each other. Conveniently, the second sheet brake body are deformed independently of each other or deflected.

Preferably, at least five, more preferably at least ten, first arc brake bodies are present. It is expedient if at least five, more preferably at least ten, second arc brake bodies are provided.

Conveniently, the number of first sheet brake body is identical to the number of second sheet brake body.

Preferably, the first sheet brake body are individually and independently mounted in the respective carrier. Preferably, the second sheet brake body individually and independently mounted in the respective carrier. Alternatively, the first sheet brake bodies are interconnected in the carrier via a transverse web, which in turn is secured to the carrier. Alternatively, the second sheet braking members are connected together in the carrier via a transverse web, which in turn is secured to the carrier.

Preferably, the first plurality of first sheet brake body essentially forms a first line-shaped point of attack or braking point on the sheet to be braked, while the second plurality of second sheet brake body essentially forms a second line-shaped point of attack or braking point on the sheet to be braked. The first and second engagement points are parallel to each other and extend transversely to the transport direction.

Conveniently, the dispensing devices specified in the dependent claim 14 are each designed as unwinding devices that may be part of a splice arrangement. The apparatus for producing single-faced corrugated cardboard preferably comprises at least one corrugating roll for corrugating one of the material webs and a connecting device for connecting the corrugated material web to the other, smooth material web.

It is expedient if the first and second material webs are endless material webs. These are preferably formed from a paper or cardboard material.

The dependent claims 2 to 12 may also be the subject of independent claims 13 and 15.

Fig. 1

eine schematische Seitenansicht einer erfindungsgemäßen Anlage zum Bereitstellen von Bögen, die eine Bogen-Brems-Vorrichtung nach der Erfindung hat,

Fig. 2

eine schematische Seitenansicht einer in Fig. 1 dargestellten Bogen-Brems-Einrichtung, deren Bogen-Bremskörper bremsend an einen abzubremsenden Bogen angreifen,

Fig. 3

eine vereinfachte Seitenansicht einer in Fig. 1 und 2 dargestellten Bogen-Brems-Einrichtungen, die sich in einem unwirksamen Nicht-Brems-Zustand befindet,

Fig. 4

eine perspektivische Ansicht der in Fig. 2 dargestellten Bogen-Brems-Einrichtung,

Fig. 5

eine Vorderansicht der in Fig. 3 dargestellten Bogen-Brems-Einrichtung, und

Fig. 6

eine rückseitige Ansicht der in den Fig. 3 und 5 dargestellten Bogen-Brems-Einrichtung.

Hereinafter, a preferred embodiment of the invention will be described by way of example with reference to the accompanying drawings. Showing:

Fig. 1

a schematic side view of an inventive system for providing sheets, which has a sheet brake device according to the invention,

Fig. 2

a schematic side view of an in Fig. 1 illustrated bow-brake device, the bow brake body attack braking to a bow to be braked

Fig. 3

a simplified side view of a Fig. 1 and 2 illustrated bow-brake devices, which is in an inoperative non-braking state,

Fig. 4

a perspective view of in Fig. 2 illustrated bow brake device,

Fig. 5

a front view of in Fig. 3 illustrated bow brake device, and

Fig. 6

a back view of the in the Fig. 3 and 5 illustrated bow brake device.

In the Fig. 1 The plant shown comprises a cross-cutting unit 1, one of the cross-cutting unit 1 in a transport direction 2 of a transported sheet 3 downstream arc brake device 4 and one of the sheet brake device 4 in the transport direction 2 downstream sheet-stacking device 5. The sheet braking device 4 is thus arranged between the cross-cutting unit 1 and the sheet-stacking device 5. The terms "upstream" and "downstream" used herein refer to the transport direction 2, respectively.

The cross-cutting unit 1 comprises a cross-cutting roller pair 6, which comprises an upper transverse cutting roller 8 which can be driven in rotation about an axis of rotation 7 and a lower transverse cutting roller 10 which can be driven in rotation about an axis of rotation 9. The axes of rotation 7, 9 parallel to each other and perpendicular to the transport direction 2. Between the upper cross-cutting roller 8 and the lower cross-cutting roller 10 is a nip 11 through which a corrugated web 12 is guided or feasible.

Each cross-cutting roller 8, 10 carries a radially outwardly extending and perpendicular to the transport direction 2 extending knife (not shown). The knives of the cross-cutting roller pair 6 cooperate for transverse cutting through the corrugated web 12, whereby the sheets 3 are formed from the corrugated web 12. After the cross-cutting roller pair 6 are cut sheets 3 before.

The upper transverse cutting roller 8 and the lower transverse cutting roller 10 are mounted in a frame 13.

The cross-cutting unit 1 also has, upstream of the cross-cutting roller pair 6, a draw-in roller 14, which is mounted rotatably or rotatably drivable around a rotation axis 15 in the frame 13. The axis of rotation 15 extends parallel to the axes of rotation 7, 9.

In addition, the cross-cutting unit 1 has an extension 16, which is arranged downstream of the cross-cutting roller pair 6. The drawer 16 is here formed by two pairs of transport rollers 17, which are arranged spaced from each other in the transport direction 2. Each transport roller pair 17 has two transport rollers 18, 19, the axes of rotation 20 and 21 parallel to each other and parallel to the axes of rotation 7, 9, 15 extend. Between the transport roller pairs 17, the sheets 3 are guided on a table 22 slidably.

The sheet brake device 4 has a sheet guide unit 23 with an upwardly facing guide support surface 24 which extends substantially horizontally in the transport direction 2. The sheet guide unit 23 is designed like a table.

Above the sheet guide unit 23, a holder 25 extends in the transport direction 2. On the holder 25, two sheet brake devices 26 are arranged, which are identical and are arranged spaced apart in the transport direction 2. The sheet braking devices 26 are preferably pivotally mounted on the holder 25.

As well as from the Fig. 2 to 6 As can be seen, each sheet braking device 26 has an upper support 27 and a plurality of first and second arc brake bodies 28 and 29 secured to the support 27. The support 27 extends perpendicular to the transport direction 2. The first arc brake bodies 28 are arranged in the carrier 27 spaced from each other next to each other. Further, the second sheet brake body 29 in the carrier 27 spaced from each other are arranged side by side. The first sheet brake body 28 are arranged like a finger. Also the second bow brake body 29 are arranged like fingers. The first and second arc brake bodies 28 and 29 each extend perpendicularly away from the carrier 27 in the direction of the sheet 3 to be braked.

The first sheet brake bodies 28 each have a first identical length L1 starting from the carrier 27, while the second sheet brake bodies 29 each have a second identical length L2. The first sheet brake bodies 28 are shorter than the second sheet brake bodies 29. The first sheet brake bodies 28 each have a free first end 30, while the second sheet brake bodies 29 each have a free second end 31. The first ends 30 and optionally adjacent sections to these each form a first braking region 32, while the second ends 31 and optionally adjacent sections to each form a second braking region 33.

The first and second sheet brake bodies 28, 29 each have a width B which extends perpendicular to their longitudinal extent and which is constant over the longitudinal extent. The width B of the first sheet brake body 28 and the second sheet brake body 29 are identical. The width B is much smaller than the length L1 or L2.

The first sheet brake body 28 and the second sheet brake body 29 in a sheet braking device 26 each have an identical, constant cross-section, which is preferably an elongated, rectangular cross-section extending longitudinally perpendicular to the transport direction 2.

The first sheet brake body 28 and the second sheet brake body 29 are arranged overlapping each other when they are in their inoperative state. They are thus arranged in the respective sheet braking device 26 perpendicular to the transport direction 2 without displacement to each other.

In each sheet brake device 26, the first sheet brake bodies 28 are arranged upstream of the second sheet brake bodies 29. In the unloaded or inoperative state, the first sheet brake body 28 abuts the adjacently arranged second sheet brake bodies 29 flat over the entire first length L1. In the unloaded or inoperative state, the first sheet brake bodies 28 lie in a first plane, while the second sheet brake bodies 29 are then arranged in a second plane parallel to the first plane.

The sheet braking devices 26 are inclined in their operative state to the sheet 3 to be braked so that the first and second sheet brake bodies 28 and 29 respectively include a first angle w1 and a second angle w2 with the sheet 3 to be braked. The angle w1 is greater than the angle w2. The angle w1 is preferably between 40 ° and 60 °, while the angle w2 is preferably between 20 ° and 40 °. The sheet brake devices 26 extend obliquely downwardly from the carriers 27 in the transporting direction 2.

Between the first sheet brake bodies 28 there is a respective first separation gap 34, while a second separation gap 35 is present between the second sheet brake bodies 29. The first and second separation gaps 34 and 35 are respectively constant and identical to each other.

The first sheet brake body 28 are independently deflectable or deformable. Also, the second sheet brake body 29 are independently deflectable or deformable. The first sheet brake body 28 and the second sheet brake body 29 are also independently deflectable or deformable.

Upstream and downstream of the sheet brake devices 26, a conventional sheet brake device is disposed on the holder 25, which has only second sheet brake bodies 29 as compared with the sheet brake devices 26.

The sheet stacking device 5 has a frame 37 in which a flat, height-adjustable sheet tray (not shown) is arranged.

The operation of the system, in particular the sheet brake device 4, will be described in more detail below.

From a first unrolling device, a first material web is unrolled, while a second material web is unrolled by a second unrolling device. The first and the second material web are guided into a device for producing one-sided laminated corrugated cardboard. The first material web is passed to produce a corrugation between two adjacently arranged corrugating rollers of the apparatus for producing one-sided laminated corrugated cardboard, so that it is present after the implementation as a corrugated web.

Subsequently, the corrugated web is glued in a gluing device and so glued to the second smooth material web. Such a device is for example from the EP 0 687 552 A2 (corresponding US Patent 5,632,850 ), of the DE 195 36 007 A1 (corresponding GB 2,305.67A ) or the DE 43 05 158 A1 to which reference is made for details.

The resulting, consisting of the first material web and the second material web, one-sided laminated corrugated web 12 is then inserted into the cross-cutting unit 1. The corrugated web 12 is passed through the nip 11, where the corrugated web 12 is cut into the individual sheets 3 by the knives of the cross-cutting rollers 8, 10. The sheets 3 are then guided on the table 22 by the transport rollers 18, 19 to the sheet brake device 4.

In the sheet braking device 4, the sheets 3 are braked and slowed promoted scaled. A sheet 3 entering the sheet brake device 4 first comes in contact with the upstream sheet brake mechanism 26 and only then with the sheet brake mechanism 26 arranged downstream in the direction of transport 2. The sheet 3 already has a reduced speed when it reaches the downstream sheet brake device 26.

In the case of the sheet brake devices 26, the sheet 3 strikes the first sheet brake body 28 first and then the second sheet brake body 29 arranged downstream thereof. The first and second sheet brake bodies 28, 29 can each be curved differently. which is also dependent on the contact pressure against the sheet 3 to be braked. How out Fig. 1 As can be seen, the second arc brake body 29 are curved more than the first sheet brake body 28, which extend substantially in a plane.

The first and the second brake areas 32 and 33 each press in the direction of transport 2 spaced from each other from above on the sheet 3 to be braked and press it from above against the guide support surface 24, whereby the sheet 3 is braked by friction.

The scalloped sheets 3 are then stored stacked on the sheet support.

It is of advantage if the first and second sheet brake bodies 28, 29 of the sheet braking device 26 arranged adjacent to the cross cutting unit 1 or to the pullout 16 are each shorter than the sheet brake bodies 28, 29 of this downstream arc brake device (s) 26. It is particularly preferred if the first sheet braking body 28 of the sheet braking device 26 arranged adjacent to the cross cutting unit 1 or to the pullout 16 is shorter than the first sheet braking body 28 of the sheet braking device downstream of this / en 26 is. It is particularly preferred if the second sheet brake body 29 of the sheet brake device 26 arranged adjacent to the cross cutting unit 1 or to the pullout 16 is shorter than the second sheet braking body 29 of the sheet brake device downstream of this / en 26 is. As a result, a uniform braking force can be applied to the sheet 3 to be braked.

Claims (15)

Sheet braking device for braking in a transport direction (2) transported sheets (3), in particular of corrugated sheets, comprising a) at least one holder (25), b) at least one adjacent to the at least one holder (25) arranged sheet guide unit (23) for guiding the braked in the transport direction (2) transported sheets (3), and c) at least one sheet braking device (26), i) which is held by the at least one holder (25), ii) which is arranged adjacent to the at least one sheet guiding unit (23), iii) comprising at least a first sheet brake body (28), - Has a first braking area (32) for braking attacking the braked, in the transport direction (2) transported sheet (3), and iv) comprising at least a second sheet brake body (29), - having a second braking portion (33) for braking attacking the braked, in the transport direction (2) transported sheet (3), v) wherein the at least one arc brake device (26) is designed such that the first brake region (32) of the at least one first arc brake body (28) and the second brake region (33) of the at least one second arc brake body ( 29) when braking in the transport direction (2) spaced from each other on the braked, in the transport direction (2) transported sheet (3) attack. Sheet braking device according to claim 1, characterized in that the at least one first sheet brake body (28) and the at least one second sheet brake body (29) by a common carrier (27) are supported. Sheet braking device according to claim 1 or 2, characterized in that the at least one first sheet brake body (28) has a first length (L1) and the at least one second sheet brake body (29) has a second length (L2), which is greater than the first length (L1). Sheet brake device according to one of the preceding claims, characterized in that the at least one second sheet brake body (29) in the transport direction (2) downstream of the at least one first sheet brake body (28) is arranged. Sheet braking device according to one of the preceding claims, characterized in that the at least one first sheet brake body (28) is in its inoperative state in a first plane and the at least one second sheet brake body (29) in its inoperative state in a second level, the second level being parallel to the first level. Sheet brake device according to one of the preceding claims, characterized in that the at least one first sheet brake body (28) and the at least one second sheet brake body (29) in their inoperative state in the transport direction (2) at least partially abut each other. Sheet brake device according to one of the preceding claims, characterized in that the at least one first sheet brake body (28) and / or the at least one second sheet brake body (29) is / are elongated. Sheet-braking device according to one of the preceding claims, characterized in that the at least one first sheet brake body (28) is resilient and / or the at least one second sheet brake body (29) is resiliently / are. Sheet braking device according to one of the preceding claims, characterized in that the at least one first sheet brake body (28) and the at least one second sheet brake body (29) are at least partially deflected relative to each other. Sheet-braking device according to one of the preceding claims, characterized in that the at least one first sheet brake body (28) has a rectangular cross section at least in its first braking region (32) and / or the at least one second sheet brake body (29). at least in its second braking region (33) has a rectangular cross-section. Sheet brake device according to one of the preceding claims, characterized in that the at least one first sheet brake body (28) and the at least one second sheet brake body (29) have different area moments of inertia and / or resistance moments. Bow-brake device according to one of the preceding claims, characterized in that the at least one arc-brake device (26) a) a first plurality of first sheet brake body (28), which are arranged in a perpendicular or oblique to the transport direction (2) extending first row next to each other, and / or b) a second plurality of second sheet brake body (29), which are arranged in a perpendicular or oblique to the transport direction (2) extending second row next to each other. Plant for providing sheets, in particular corrugated sheets, comprising a) at least one cross-cutting unit (1) for generating sheets (3) from a in a transport direction (2) transported web (12), in particular corrugated web, and b) at least one of the at least one cross-cutting unit (1) in the transport direction (2) downstream sheet braking device (4) according to one of the preceding claims, wherein preferably at least one sheet braking device (4) upstream to at least a sheet stacking device (5) is arranged. Plant according to claim 13, characterized by a) a first dispensing device for dispensing a first material web, b) a second dispensing device for dispensing a second material web, and c) a device for producing a single-faced laminated corrugated web (12) of the first material web and the second material web, d) wherein the at least one sheet brake device (4) downstream of the device for producing the single-faced laminated corrugated web (12) is arranged. Sheet brake device, in particular corrugated sheet brake device comprising a) at least one first arc brake body (28), i) having a first braking portion (32) for braking engagement with the braked in the transport direction (2) transported sheet (3), and b) at least one second arc brake body (29), i) having a second braking region (33) for braking engagement with the sheet (3) to be braked in the transporting direction (2), c) wherein the at least one sheet brake device is designed such that the first brake region (32) of the at least one first arc brake body (28) and the second brake region (33) of the at least one second arc brake body (29) Braking in the transport direction (2) spaced apart to the braked, in the transport direction (2) transported sheet (3) attack.

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