EP1060118B1 - Strip guide for a device for conveying strips of material or material in the form of sheets, especially a corrugated board machine - Google Patents

Abstract

The invention relates to a strip guide (13) for a device for conveying strips of material (9) or material in the form of sheets, especially for corrugated board machines, comprising several elements (23) pivotally mounted on an axis (A) transversal to the direction of conveyance (I) of the strips of material or sheets of material and parallel to the strips of material or the plane of conveyance of the sheets of material. Said elements can pivot independently in set positions by means of an actuating device (33). Each element (23) comprises one or several longitudinal bars (25) with a convex cross section in the direction of the strip of material (9) or the sheets of material to be conveyed.

Description

The invention relates to a rail switch for a device for transporting Material webs or sheet material, in particular for a corrugated cardboard plant, with the features of the preamble of claim 1.

In corrugated cardboard systems, which usually have a large spatial expansion have, find for the transport of the continuous corrugated cardboard web or Transport of partial webs cut to a specific format or of already cut corrugated cardboard sheet turnouts use to the material web (s) or the sheets an alternatively selectable further Feed processing step. So the sheets can be a specific stacker be fed. The alternative selection can also run across Direction of conveyance take place: For example, an already slit Partial web for further processing of the individual partial webs using a double cross cutter supplied, i.e. the partial webs are each (preferably at different heights) of a certain cutting device of the Double cross cutter fed.

Known railway switches have several "paddles" for this purpose, which cross one to the conveying direction and axis lying essentially in the conveying plane are pivotable. In known rail switches, for example, 10 to 15 such paddles arranged side by side, so that the to be transported Material at the outer free end of the paddle at different heights can be further processed. By the presence of several Such a paddle is a flexible feeding of several side by side transported webs or sheets to other facilities possible. In the As a rule, several paddles are always put together into a predetermined one Angular position swiveled, the width of the paddles (transverse to the transport direction) is chosen much smaller than the smallest width of the to be transported Web or arch. This results in sufficient flexibility when choosing the width of the individual partial webs.

The paddles of known railway switches consist of a U-shaped cross section Profile, the two legs of the U are relatively short and only serve to stiffen the paddle. The width of the paddle and so the profile is about 10 to 15 cm. The top of the paddle on which the underside of the web to be transported or the sheets to be transported lying on, is just trained.

Especially at high transport speeds and / or very light qualities of the material to be transported has been shown to be too a floating of the material comes between itself underneath of the material and the top of the paddle forms an air film. This can the feeding of the material to the subsequent facilities is not possible in the desired exact way.

Furthermore, it can, especially in the production of corrugated cardboard, on the Paddle to a precipitate of vaporized sideways from the corrugated cardboard Substances, especially moisture and glue, come. When changing formats towards a larger width of the (partial) web or the following sheets the bottom of the subsequent material comes in with this precipitate Contact. On the one hand, this causes the underside of the material to become dirty and on the other hand, this can cause the material to stop.

The transport process is disturbed thereby, in extreme cases it may even be necessary to stop the production process.

From DE-A-26 21 915 a web feed device is also known, in which several are arranged at a transverse distance from one another and in the longitudinal direction corresponding parallel fingers are provided. The fingers are each can be swiveled around a horizontal axis, with a double-acting one for each finger Air cylinder is provided. 3 of DE-A-26 21 915 can the fingers are made of a thin material, each finger in cross section is concave in the direction of the underside of the web to be guided, thus has a hollow design.

The invention is therefore based on the object of a rail switch for a device for transporting material webs or sheet material, in particular for a corrugated cardboard plant to create the above Avoids disadvantages and in particular a pollution-free and exact Transport of the material to be conveyed, even with light qualities and / or high speeds. Furthermore, the invention is the Task based on a device for the transport of material webs or to create arcuate material, in particular for a corrugated cardboard plant, in the over the entire length of the support surface for the material to be conveyed pollution-free and safe transport is guaranteed.

The invention solves this problem with the features of patent claims 1 or 6.

The invention is based on the knowledge that in known corrugated cardboard systems tube tables used so far, especially in the conveyor line after the heating section, to avoid disadvantages due to the here still relatively strong vapors from the lateral edge of the corrugated cardboard web not only ensure pollution-free transport, but especially with light qualities and / or high web speeds also prevent floating of the material to be conveyed can. By forming each swiveling paddle from one or several longitudinal bars with one towards the bottom of the to be transported Material convex cross section and by providing an adequate Air gap or distance between the individual longitudinal bars will Forming an air film and thus the floating of the transported Materials safely avoided.

In the preferred embodiment of the invention, the longitudinal bars are Paddle cylindrical, in particular as tubes, each paddle or Element consists of two longitudinal bars.

The longitudinal rods preferably have a diameter of approximately 3 to 4 cm, at a distance of about 1 to 3 cm.

In the preferred embodiment of the invention, the longitudinal bars are each Elements connected by webs that are not to be transported to the bottom of the Project material web.

According to one embodiment of the invention, these webs can be used as air guiding elements act that have a guide surface that is with the bottom of the to be transported Include an obtuse angle. Here is the guide surface provided on the rear side of the air guide, i.e. at the the Transport side facing.

This has the advantage that the transported from the bottom of the Material generated air flow is deflected down, thereby also a slight suction effect can be achieved, which the to be transported Material holds securely on the track switch without excessive friction.

Of course, this measure cannot only be used in conjunction with a Railway switch, but also with known support tables for transport equipment can be used for material webs or sheet material.

According to a further embodiment of the invention, the longitudinal bars each paddle (if necessary additionally) on one or both front ends of the Longitudinal rods with transverse struts arranged thereon, the Top of the cross strut below the bottom of the material to be transported ends. This results in additional stiffening of the paddles. In addition can at the rear end of the paddle the cross strut provided there Serve bracket for the required pivot bearing.

In the device according to the invention for the transport of material webs or sheet material are all exclusively for the Transport of the material web or material sheet serving support surfaces Such longitudinal rods are formed and in addition all rail switches in the trained in the manner described above. This will cover the entire length the transport device achieves the advantages explained above.

Further embodiments of the invention result from the subclaims.

Fig. 1

einen Ausschnitt aus einer Wellpappenanlage, mit mehreren Einrichtungen zum Transport von Materialbahnen bzw. bogenförmigem Material;

Fig. 2

eine schematische Seitenansicht einer Bahnweiche nach der Erfindung;

Fig. 3

eine Draufsicht auf die Bahnweiche in Fig. 2 und

Fig. 4

eine vergrößerte Seitenansicht eines Schnitts entlang der Linie II-II in Fig. 3.

The invention is explained in more detail below with reference to an embodiment shown in the drawing. The drawing shows:

Fig. 1

a section of a corrugated cardboard system, with several devices for transporting material webs or sheet material;

Fig. 2

is a schematic side view of a rail switch according to the invention;

Fig. 3

a plan view of the rail switch in Fig. 2 and

Fig. 4

3 shows an enlarged side view of a section along the line II-II in FIG. 3.

The section shown in Fig. 1 from a corrugated cardboard system 1 consists of a short cross cutter 3 arranged from the feed end, which a from the exit of the heating and cooling section (not shown) fed endless Corrugated cardboard web 9 on the side edges to produce format changes cuts. At the output end of the short cross cutter 3 is one first conveyor 5 is provided, which essentially consists of a rigid Table 7 exists. This section of the conveyor 5 serves for further cooling the web of corrugated cardboard 9, which is still endless, before it is on the output side End of the first conveyor 5 a cutting and creasing machine 11 is supplied. This essentially comprises a slitter, which on the one hand cuts off the lateral edges of the corrugated cardboard web 5 and disposed of, as well as the then usable width of the corrugated cardboard web 9 in cuts different partial webs (benefit) 9a, 9b.

The partial webs 9a, 9b are at the output end of the cutting and creasing machine 11 fed to a track switch 13. The railway switch 13 leads one Partial web 9a an upper support table 15 one provided below second conveyor 17 and the other partial web 9b a lower support table 19 of the conveyor device 17. Then the individual partial webs a double cross cutter 21 which consists of the individual Partial webs 9a, 9b cut out sheets of the desired length.

The support tables 7 or 15 and 19 of the first or second conveyor device 5 or 17 can be designed in a manner known per se as tubular tables. there the support surfaces consist of several, side by side on one level arranged tubes with a predetermined distance. This will be a Accumulation of condensate from the side edges of the corrugated cardboard emerges, in the support surface for the underside of the corrugated cardboard web 9 essentially avoided, since the corrugated cardboard web ideally only touches the line with each tube that has cushions. Due to the slope in the pipe cross-section The condensate can be left or right of the line contact of the pipes can drain down or is only reflected in those areas that do not come into contact with the underside of the web 9.

According to the knowledge of the invention, such tubular tables can also float the corrugated cardboard web at high transport speeds and / or avoid light qualities.

In the device according to the invention for the transport of material webs or sheet-like material is therefore used exclusively for tube tables or Contact surfaces made of pipes are used. Of course, the individual Longitudinal rods can also be formed in any other way. It’s just a requirement that the bottom of the web of corrugated cardboard to be transported facing top in convex cross section towards the corrugated cardboard web is trained. According to the invention, all rail switches are 13 in the manner explained below from individual longitudinal bars or elements educated.

Fig. 2 shows a side view of such, in Fig. 1 with the reference numeral 13 designated railroad switch. The track switch 13 includes, as from the top view 3, several pivotally mounted elements 23. Die Elements or paddles 23 are around an axis A at the rear end of the paddles 23 pivotally mounted, the axis A transverse to the transport direction I of the Corrugated cardboard web 9 and in a plane parallel to the corrugated cardboard web 9 (before the Bahaweicht 13 is fed) is stored.

In the illustrated embodiment, each element 23 consists of two longitudinal bars 25, which are connected by means of webs 27. The webs 27 are preferred formed so that their top side does not over the top of the longitudinal bars 25 protrude or extend into the plane of the top of the longitudinal rods 25. This results in a contact of the top of the webs 27 with the Underside of the corrugated cardboard web 9 to be transported avoided.

As can be seen from FIG. 4, the webs 27 can be between the longitudinal bars 25 also take over the function of air guiding elements. For this purpose, the webs 27 formed such that they have a loofing surface 27a which is at the rear End of the web 27 is formed. The air guide surface 27a closes with the Bottom of the material to be transported an obtuse angle α. This ensures that the bottom of the to be transported Material web 9 entrained air is deflected obliquely downwards without there is an air jam under the corrugated cardboard web 9 in areas in front of the webs 27 can form. Due to the downward airflow generated in this way there is also a suction effect, which the corrugated cardboard web safely adheres to the surface of the elements 23.

Such webs 27 can be arranged at suitable intervals in the longitudinal direction of the elements 23 may be provided.

This feature of the webs designed as an air guiding element does not necessarily have to be used in connection with the rail switches according to the invention , but can also be used separately for rigid support surfaces Find.

In the rear area of the paddle 23 is in the embodiment shown a strut 29 directed essentially at right angles downward is arranged, which is preferably attached to the front of a web 27. The bottom the strut 29 is articulated with the piston 31 of a hydraulic or pneumatic cylinder 33 connected.

In this way, each element 23 can be independent of the other elements can be pivoted about the axis A.

In a manner known per se, several of the elements are always replaced by the Providing a suitable control for the cylinder 33 so pivoted that the partial web in question essentially completely on the surface of the concerned group of elements.

The articulated connection of the elements 23 with the previous rigid support can, as can be seen from FIG. 3, take place in such a way that a on the back of a web 27 arranged fork-shaped element 35 cooperates with a strut 37, which is fixed to the upstream rigid support is, preferably also on a corresponding web. In the real area These two elements can then be forked in the usual way a bolt in the A axis.

Claims (7)

1. Track points for a device for transporting material webs or sheet-like material, more particularly for a corrugated board installation,

   a) with a plurality of elements (23) pivotably mounted in an axis (A) extending transversely to the direction of transportation (I) of the material webs (9) or material sheets and parallel to the material web or plane of transportation of the material sheets,

   b) which elements can be pivoted independently of one another into predetermined positions by means of an actuating device (33),
   characterised in that

   c) each element (23) is formed by one or more longitudinal rods (25) having a convex cross section in the direction of the material web (9) which is to be transported or the material sheet which is to be transported.
2. Track points according to claim 1, characterised in that the longitudinal rods (25) are constructed in cylindrical fashion, more particularly as pipes.
3. Track points according to claim 1 or 2, characterised in that each element (23) is formed by two longitudinal rods (25).
4. Track points according to one of the preceding claims, characterised in that the longitudinal rods (25) of each element (23) are connected by webs (27) and the webs end beneath the underside of the material web (9) or material sheet which is to be transported.
5. Track points according to claim 1, characterised in that the webs (27) are constructed as air conducting elements, which comprises a conducting surface (27a), which forms an obtuse angle with the underside of the material web (9) or material sheet which is to be transported.
6. Track points according to one of the preceding claims, characterised in that the longitudinal rods (25) of each element (23) are connected by cross struts arranged on one or both end faces of the longitudinal rods (25), and the upper edge of the cross struts facing the underside of the material web (9) or material sheet which is to be transported ends beneath the underside of the material web or material sheet.
7. A device for transporting material webs or sheet-like material, more particularly for a corrugated board installation, characterised in that at least all bearing surfaces, with the exception of bearing surfaces effecting the transportation of the material web (9) or material sheet, are formed by longitudinal rods having a convex cross section in the direction of the material sheet which is to be transported, and all track points (13) are constructed as track points according to one of the preceding claims.

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