EP3792021B1 - Machining device for flat material sheets - Google Patents

Description

The invention relates to a processing device for flat material webs, in particular for folding material webs. The webs of material consist primarily of paper or cellulose and/or plastic and/or wire mesh or wire mesh-reinforced materials and/or combinations or laminates of the aforementioned materials. The device has an infeed table for feeding in the material web and a longitudinal cutting device on the infeed table for longitudinal cutting of the material web. The longitudinal cutting device is equipped with at least one rotatable shaft with at least one, preferably with at least two rotary knives mounted thereon. - It is within the scope of the invention that the material web of the processing device and thus also the longitudinal cutting device is fed continuously during operation. The material web, which is continuously fed in a translatory manner, is fed to the rotary knives or circular knives mounted on the rotating shaft, and these engage in the material web and thus cut the material web in the longitudinal direction.

Such processing devices are known from practice in different embodiments, such as from U.S. 4,226,151 A . The longitudinal cutting device usually works with at least two rotating shafts, with rotary knives or circular knives being mounted or fixed on each shaft. The rotary cutters of one shaft work as upper cutters and the rotary cutters of the other rotating shaft work as lower cutters and, as it were, form a counter bearing for the rotary cutters of the first shaft working as upper cutters. The rotary cutters or circular cutters are extremely sharp tools that can cause unpleasant injuries to the operators.

In practice it is often desirable that the width of the slit web of material should be changed and for this purpose the rotary knives of a shaft must have an alternative spacing from one another. In this context, it is known from practice to replace the rotating shafts with the rotary cutters mounted on them as a whole. Replacing the shafts is not possible in the operating position of the device, since the risk of injury for the operator would be too high. For this reason, in practice, the infeed table equipped with the shafts is pulled completely out of the device, for example pulled out of the device by 1 m to 1.50 m. In this pulled-out state, a shaft with rotary knives mounted thereon can then be exchanged for another shaft with rotary knives at a different spacing. These measures are expensive because, among other things, various device components have to be detached from one another. In addition, when the infeed table is pulled out, there are a number of projecting machine components which also pose a risk of injury or tripping for the operators. Therefore, the measures known from practice are in need of improvement.

Accordingly, the invention is based on the technical problem of specifying a processing device of the type mentioned at the outset in which the distance between the rotary cutters can be changed in a simple, inexpensive and functionally reliable manner and in which the risk of injury to the operators can be largely avoided.

• wobei die Längsschneideinrichtung mit zumindest einer rotierbaren Welle mit zumindest einem, vorzugsweise mit zumindest zwei darauf montierten Rotationsmessern, insbesondere Kreismessern ausgestattet ist,
• wobei die zumindest eine rotierbare Welle in dem Betriebszustand der Vorrichtung in einem Abstand a zum Aufstellgrund bzw. zum Erdboden angeordnet ist, wobei der Einlauftisch aus seiner Betriebsposition B in eine Wartungsposition W verschwenkbar ist,
• wobei die rotierbare Welle in dieser Wartungsposition W in einem im Vergleich zum Abstand a größeren Abstand a+x zum Aufstellgrund bzw. zum Erdboden angeordnet ist und wobei in der Wartungsposition W des Einlauftisches
  • die rotierbare Welle austauschbar ist
  • und/oder zumindest ein auf der rotierbaren Welle montiertes Rotationsmesser entlang der Welle in eine Alternativposition verschiebbar und dort fixierbar bzw. montierbar ist.

To solve this technical problem, the invention teaches a processing device for flat material webs, in particular for Folding of material webs made of paper or cellulose and/or plastic and/or wire mesh or wire mesh-reinforced materials and/or combinations or laminates of the aforementioned materials, the device having an infeed table for feeding in the material web and a longitudinal cutting device on the infeed table for lengthwise cutting of the material web,

• wherein the longitudinal cutting device is equipped with at least one rotatable shaft with at least one, preferably at least two rotary knives, in particular circular knives, mounted on it,
• wherein the at least one rotatable shaft is arranged at a distance a from the installation base or the ground when the device is in the operating state, wherein the infeed table can be pivoted from its operating position B into a maintenance position W,
• wherein the rotatable shaft is arranged in this maintenance position W at a greater distance a+x from the installation base or the ground than the distance a, and wherein in the maintenance position W the infeed table
  • the rotatable shaft is replaceable
  • and/or at least one rotary knife mounted on the rotatable shaft can be displaced along the shaft into an alternative position and can be fixed or mounted there.

The second alternative is particularly preferred in the case of at least one rotary cutter mounted on the rotating shaft or in the case of a plurality of rotary cutters mounted on the rotating shaft along the shaft can be moved into an alternative position and can be fixed or mounted there. This embodiment variant is of particular importance within the scope of the invention.

The invention is based on the finding that the inventive pivotability of the infeed table together with the rotating shaft or together with the rotating shafts enables problem-free and at the same time functionally reliable assembly with regard to an alternative spacing of the rotary cutters. Above all, a simple replacement of the rotatable shafts or a simple shifting of the rotary cutters on the shafts is possible without causing impairments or injuries or tripping hazards for the operators. It is also of particular importance that this assembly work is possible very quickly and without long interruptions in the operation of the device due to the simple pivotability of the unit consisting of the infeed table and rotatable shafts.

It is within the scope of the invention that the processing device according to the invention has a folding device for folding the supplied web of material. The infeed table and the at least one rotatable shaft are expediently arranged in front of the folding device in the feed direction of the material web. It is therefore within the scope of the invention that in the feed direction of the material web the material web is first guided over the unit consisting of the infeed table and the at least one rotatable shaft and is then guided through the folding device. In combination with a folding device, the measures according to the invention are of particular importance. The pivoting according to the invention and the mounting option according to the invention have proven particularly useful here. With a folding device preferably provided in the context of the invention, the Material web in particular folded like a bellows. Such folded material web sections are used, for example, as filter media.

A particularly recommended embodiment of the device according to the invention is characterized in that the longitudinal cutting device has at least two rotatable shafts, each with at least one, preferably at least two rotary knives, in particular circular knives, mounted thereon. It is within the scope of the invention that after the infeed table has been pivoted into the maintenance position W, both rotatable shafts are arranged at a greater distance from the installation base of the device or from the ground than in the operating position B of the infeed table or the longitudinal cutting device. The rotary knives mounted on a rotatable shaft are arranged at a predetermined distance from one another and thus define the width of the material strip to be cut with the longitudinal cutting device. For example, four rotary cutters or circular cutters can also be mounted on a rotatable shaft, so that three longitudinal strips of a predetermined width depending on the distance between the rotary cutters can then be cut from the material web.

A rotary blade used within the scope of the invention is preferably designed as a circular blade with a circular or essentially circular circumference. It is within the scope of the invention that the diameter of a rotary blade in the form of a circular disk is larger or significantly larger than the diameter of the associated rotatable shaft. The diameter of a rotary blade or a circular blade is preferably at least 1.2 times and preferably at least 1.5 times as large as the diameter of the associated rotatable shaft on which the rotary blade is mounted. According to one embodiment, the diameter of the rotary knife at least 1.8 times the diameter of the associated rotatable shaft on which the rotary knife is mounted.

A rotary cutter is expediently mounted or fixed on the rotatable shaft with the aid of at least one fixing element. By loosening the at least one fixing element, the rotary blade can be moved on the shaft or along the shaft and removed from the shaft if necessary. The fixing elements are, for example, clamping elements, clamping rings, bolts, screws and the like. It is within the scope of the invention that a rotary knife is clamped with at least one fixing element on the associated rotatable shaft.

At least one, in particular a rotatable shaft is expediently equipped with at least one, preferably with at least two rotary cutters, with the rotary cutter or rotary cutters functioning or functioning as an upper cutter in the longitudinal cutting device. Furthermore, at least one, in particular a rotatable shaft is preferably equipped with at least one, preferably with at least two rotary cutters, with the rotary cutter or rotary cutters functioning/functioning as lower cutters in the longitudinal cutting device. The lower blade or the lower blades form, as it were, a counter bearing for the upper blade or for the upper blades when cutting the material web longitudinally.

According to the invention, the infeed table can be pivoted out of its operating position B into a maintenance position W. It is preferred that the infeed table can be pivoted about a pivot axis or only about one pivot axis during the transfer from the operating position B to the maintenance position W. Preferably, therefore, the transfer of the operating position B into the maintenance position W with the aid of only one pivoting movement of the infeed table about the said pivoting axis. A particularly recommended embodiment of the invention is characterized in that the infeed table is first moved in translation from the operating position B by a displacement distance V during the transfer from the operating position B to the maintenance position W, specifically in the direction opposite to the direction of feed of the material web. Only then is the infeed table pivoted into the operating position B and preferably pivoted about the only one pivot axis. It is within the scope of the invention that the displacement distance V is relatively short. Preferably, the length of the displacement path V for the infeed table is at most 6 times, in particular at most 5 times and preferably at most 4 times the diameter of a rotatable shaft of the infeed table or the diameter of the rotating shaft in the area of a rotary knife mounted thereon. In this respect, the displacement distance V used according to the preferred embodiment for the translational movement of the infeed table is much shorter than the distance by which the infeed table is pulled out of the machine in the known measures described at the outset. The displacement distance V is therefore expediently less than 1 m, preferably less than 90 cm, in particular less than 80 cm, preferably less than 70 cm and very preferably less than 60 cm. According to a recommended embodiment of the invention, the displacement distance V for the translational movement of the infeed table is less than 50 cm.

As has been tried and tested, the infeed table is pivoted by the displacement distance V into the maintenance position W after its translatory movement. According to a highly recommended embodiment of the invention, the infeed table is rotated by 60° to 60° during the transfer from the operating position B to the maintenance position W 120°, in particular by 70° to 110°, preferably by 80° to 100° and very preferably by 85° to 95° and particularly preferably by 90° or by about 90° from the operating position B to the maintenance position W.

It is within the scope of the invention that the rotatable shaft or the rotatable shafts with the rotary cutters is/are pivoted upwards when the infeed table is pivoted into the maintenance position W, so that the front infeed side of the infeed table is expediently directed downwards to the installation base and/or to the Is oriented towards the ground and the rotatable shaft or the rotatable shafts are arranged on the upper side of the pivoted infeed table. In this way, the rotatable shafts or the rotating cutters are easily accessible for replacing the shafts or for adjusting the rotating cutters. It is also within the scope of the invention that the rotating shaft or the rotating shafts are pivoted towards the infeed side of the infeed table and are preferably pivoted through an angle of 90° or approximately 90° in this way. Furthermore, it is within the scope of the invention that the run-in surface of the run-in table in the maintenance position W of the run-in table is arranged transversely or perpendicularly or essentially perpendicularly to the installation base of the device or to the ground. It is recommended that a rotatable shaft in the maintenance position W of the infeed table be at a distance of 100 to 200 cm, in particular 120 to 180 cm, preferably 130 to 170 cm and particularly preferably 130 to 160 cm from the installation base of the device or from the has soil.

It has already been pointed out above that the second alternative of claim 1 is particularly preferred within the scope of the invention, according to which in the maintenance position W at least one rotary knife mounted on a rotatable shaft can be displaced along the shaft into an alternative position and can be fixed or mounted there. A plurality of rotary cutters is expediently displaced on a rotatable shaft along the shaft into alternative positions and fixed or mounted there. This displacement of the rotary cutters preferably takes place both on a rotatable shaft with rotary cutters functioning as upper cutters and on a rotatable shaft with rotary cutters functioning as lower cutters.

According to a particularly recommended embodiment of the invention, a rotary blade mounted on a rotatable shaft is detached from a fixation on the rotatable shaft in the maintenance position W, moved to the alternative position on the shaft and fixed again on the shaft in the alternative position. Fixing elements for fixing the rotary knife on the shaft are preferably first loosened and after the rotary knife has been moved on the shaft into the alternative position, the rotary knife is fixed again on the shaft with the fixing elements in this alternative position.

The invention is based on the knowledge that on the device according to the invention the longitudinal cutting device can be adjusted in a very simple, problem-free and functionally reliable manner for cutting material web strips of different widths. It should be emphasized in particular that an exchange of a shaft according to the invention and/or a displacement of the rotary cutters into alternative positions according to the invention can be carried out conveniently, quickly and without the risk of injury to the operators. The transfer from the operating position B to the maintenance position W and vice versa can be carried out quickly and without disruption or constraint. It is also essential that the measures according to the invention can be implemented at low cost and with little effort. In that regard, the invention is characterized by significant advantages and in particular with regard to flexibility and variability on the one hand and with regard to functional reliability and operator friendliness on the other hand.

Fig. 1

Eine perspektivische Ansicht der erfindungsgemäßen Vorrichtung mit dem Einlauftisch in der Betriebsposition B,

Fig. 2

den Gegenstand nach Fig. 1 in einer anderen Funktionsstellung bei der Überführung in die Wartungsposition W,

Fig. 3

eine perspektivische Ansicht der Vorrichtung mit dem Einlauftisch in seiner Wartungsposition W und

Fig. 4

einen vergrößerten Ausschnitt aus der Fig. 3 im Bereich der rotierbaren Wellen bzw. im Bereich der Rotationsmesser.

The invention is explained in more detail below with reference to a drawing that merely shows an exemplary embodiment. They show in a schematic representation:

1

A perspective view of the device according to the invention with the infeed table in the operating position B,

2

the object 1 in a different functional position when transferring to the maintenance position W,

3

a perspective view of the device with the infeed table in its maintenance position W and

4

an enlarged section of the 3 in the area of the rotatable shafts or in the area of the rotary knives.

The figures show a processing device 1 according to the invention for a flat material web 2. In the exemplary embodiment, it may be a material web 2 made of paper. According to a particularly preferred embodiment of the invention, the processing device 1 is used to fold the material web 2 . For this purpose, a folding knife F is expediently provided in the exemplary embodiment, the material web 2 preferably being folded like a bellows in a manner not shown in detail by a cyclical up and down movement of the folding knife F. The device has an infeed table 3 for feeding in the material web 2 . The infeed table 3 is in the infeed direction or infeed direction in front of the folding knife F arranged. A longitudinal cutting device 4 for longitudinal cutting of the material web 2 is provided on the infeed table 3 . The material web 2 is cut into longitudinal strips of a predetermined width with the longitudinal cutting device 4 , these longitudinal strips of the material web 2 then being folded with the folding knife F . Expediently, the longitudinal cutting device 4 simultaneously cuts a plurality of longitudinal strips of the material web 2, which are fed to the folding blade F parallel to one another.

Preferably and in the exemplary embodiment, the longitudinal cutting device 4 is equipped with two rotatable shafts 5, 6, with a plurality of rotary cutters 7, 8 in the form of circular cutters being mounted on each of these rotatable shafts 5, 6. The first rotatable shaft 5 is equipped with rotary knives 7 designed as circular knives, which function as upper knives in the longitudinal cutting device 4 . It is recommended that these rotary cutters 7 or circular cutters have a narrow, sharp cutting blade running around the circumference for cutting the material web 2 . The rotary cutters 7 are firmly connected to the rotatable shaft 5 and therefore rotate with the rotatable shaft 5 and act on the material web 2 running in the feed direction function. In a proven manner and in the exemplary embodiment, these rotating knives 8 functioning as lower knives are designed as flat cylinders with a cutting edge as a counter bearing for the upper knives 7 . These rotary knives 8 or lower knives are also firmly connected to the associated rotatable shaft 6 and rotate with this shaft 6. With regard to the two rotatable shafts 5, 6 and the rotary knives 7, 8 mounted or fixed thereon, 4 to get expelled.

the 1 shows the operating state of the device and the operating position B of the infeed table 3. The rotatable shafts 5, 6 are arranged here at a certain distance from the installation base 9 of the device or from the ground. To transfer the infeed table 3 from its operating position B to a maintenance position W, the infeed table 3 is first moved by a—preferably horizontal—translational displacement distance V out of the operating position B, expediently counter to the feed direction of the material web 2 . This state of the infeed table 3, which has been displaced by the displacement distance V, is shown in FIG 2 .

Preferably and in the exemplary embodiment, following this displacement of the infeed table 3, the infeed table 3 is pivoted according to the invention from its operating position B into its maintenance position W. The infeed table 3 is expediently and in the exemplary embodiment rotated by an angle of 90° around the pivot axis 11 into the maintenance position W pivoted. This pivoted position or the maintenance position W of the inlet table 3 shows the 3 . Preferably and in the exemplary embodiment, the pivoting of the infeed table 3 was carried out with the proviso that the surface of the infeed table 3 is arranged perpendicularly to the installation base 9 or to the ground and that the front face of the infeed table 3 in the maintenance position W downwards or to the ground is oriented. The two rotatable shafts 5, 6 are expediently arranged on the upper side of the infeed table 3 in the pivoted position or in the maintenance position W, so that they can be easily accessed by an operator. In this maintenance position W, the two rotatable shafts 5, 6 are at a greater distance from the base 9 or the ground than the first distance in the operating position B.

In the maintenance position W, the two rotatable shafts 5, 6 may be at a distance of 150 cm from the installation base 9 or from the ground.

In the maintenance position W of the infeed table 3, a shaft 5, 6 can be exchanged without any problems due to the upper-side orientation of the two rotatable shafts 5, 6. It is preferred within the scope of the invention that in this maintenance position W the rotary cutters 7, 8 mounted or fixed on the rotating shafts 5, 6 are displaced along the shaft 5, 6 into an alternative position and fixed there, so that an alternative width of material strips can be cut from the material web. The rotary knives 7, 8 are expediently fixed to the respective shaft 5, 6 with fixing elements. Before moving into the alternative position, these fixing elements are preferably loosened, then the rotary knife 7, 8 in question is moved along the shaft 5, 6 into the alternative position and then fixed there again with the fixing elements.

Following the replacement or displacement work carried out on the shafts 5, 6, the infeed table 3 is expediently swiveled back around the pivot axis 11 so that the surface of the infeed table 3 is preferably oriented parallel or essentially parallel to the installation base 9 or to the ground . Preferably, the infeed table 3 is then moved back into its operating position B ( 1 ) retracted.

Claims (10)

1. A processing device (1) for flat material webs (2), in particular for folding material webs (2) made out of paper or cellulose and/or plastic and/or wire mesh or wire mesh-reinforced materials and/or combinations of laminates of the aforementioned materials, wherein the device has an infeed table (3) for feeding the material web (2) as well as a longitudinal cutting device (4) on the infeed table (3) for longitudinally cutting the material web (2),

   wherein the longitudinal cutting device (4) is equipped with at least one rotatable shaft (5, 6) with at least one, preferably with at least two, rotary knives (7, 8), in particular circular knives,

   wherein the at least one rotatable shaft (5, 6) is spaced apart by a distance a from the installation base (9) or ground in the operating state of the device, characterized in that the infeed table (3) can be pivoted out of its operating position B into a maintenance position W,

   wherein the rotatable shaft (5, 6) in this maintenance position W is spaced apart by a larger distance a+x from the installation base (9) or ground larger by comparison to distance a, and wherein, in the maintenance position W of the infeed table (3),

   - the rotatable shaft (5, 6) is replaceable,

   - and/or at least one rotary knive (7, 8) mounted on the rotatable shaft (5, 6) can be displaced along the shaft (5, 6) into an alternative position, and there fixed in place or mounted.
2. The device according to claim 1, wherein the processing device (1) has a folding device (10) for folding the fed material web (2), and wherein the infeed table (3) and the at least one rotatable shaft (5, 6) are arranged in the infeed direction of the material web (2) in front of the folding device (10).
3. The device according to one of claims 1 or 2, wherein the longitudinal cutting device (4) has at least two rotatable shafts (5, 6), each with at least one, preferably with at least two, rotary knives (7, 8), in particular circular knives, mounted thereon, wherein both rotatable shafts (5, 6) are arranged at a larger distance from the installation base (9) or ground after the infeed table (3) has been pivoted into the maintenance position W than in the operating position B of the infeed table (3).
4. The device according to one of claims 1 to 3, wherein at least one, in particular one rotatable, shaft (5, 6) is equipped with one, preferably with at least two, respective rotary knives (7, 8), which function/functions as upper knife (7) in the longitudinal cutting device (4).
5. The device according to one of claims 1 to 4, wherein at least one, in particular one rotatable, shaft (5, 6) is equipped with one, preferably with at least two, respective rotary knives (7, 8), which function/functions as lower knife (8) in the longitudinal cutting device (4).
6. The device according to one of claims 1 to 5, wherein the infeed table (3) can be pivoted around a pivot axis (11) when changing from the operating position B into the maintenance position W.
7. The device according to one of claims 1 to 6, wherein, while changing from the operating position B into the maintenance position W, the infeed table (3) can initially be translationally moved out of the operating position B by a displacement distance V - preferably moved opposite the infeed direction of the material web - and wherein the infeed table (3) can thereupon be pivoted into the operating position B.
8. The device according to one of claims 1 to 7, wherein, while changing from the operating position B into the maintenance position W, the infeed table (3) can be pivoted by 60° to 120°, in particular by 70° to 110°, preferably by 80° to 100° and very preferably by 85° to 95° from the operating position B into the maintenance position W.
9. The device according to one of claims 1 to 8, wherein, in the maintenance position W of the infeed table (3), a rotatable shaft (5, 6) has a distance of 100 to 200 cm, in particular of 120 to 180 cm, preferably of 130 to 170 cm, and especially preferably of 130 to 160 cm from the installation base (9) or to the ground.
10. The device according to one of claims 1 to 9, wherein, in the maintenance position W of a fixation to the rotatable shaft (5, 6), a rotary knife (7, 8) mounted on the or a rotatable shaft (5, 6) can be detached, can be displaced into the alternative position on the shaft, and can be fixed on the shaft (5, 6) again in the alternative position.

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