DE19927920A1 - Cutting device for folding apparatus of rotary printing press, in which one cylinder carries perforating cutter and other carries perforating counter-cutter - Google Patents

Abstract

The cutting device cuts a web (1) in the folding machine of a press with first and second cylinders (5a, 5b). The first cylinder takes a cutter (16) acting with a counter-cutter (17) in the second cylinder to cut through the web transversely. One of the cylinders carries a first perforating cutter (18) and the other carries a first perforating counter-cutter (19) to perforate the web at a certain point in its width to form a first transverse fold.

Description

The present invention relates generally to that Folding a printed material web in a folding machine a rotating printing press.

It relates in particular to a facility for Cutting a material web with a first and second Cylinder, the first cylinder receiving a knife that is suitable, with a stored in the second cylinder Counter knife cooperate to the said material web in To cut cross direction.

It also concerns a dowel-free folding machine a rotating printing machine that such Cross perforation device includes.

In a conventional, dowel-free folding machine the web of material towards one above said Cross perforation device lying in the feed rollers Feed rollers pulled.

The cross perforator includes a set of two cylinders, one with a perforation knife and one Perforation counter knife are provided for perforation the said material web on its width on one or several specific positions for the subsequent formation of Cross folds work together.

A downstream of the punching device Cutting device is provided to the perforated To divide the material web in sections in the transverse direction.

This cutting device comprises a first one Cutting cylinder and a second cutting cylinder, one Carry out an empty cut.

The material web sections obtained pass through Conveyor belt trains in a transfer cylinder.  

The perforated material web sections are on the Transfer cylinder held by pliers. On this Transfer cylinders are also mounted cross fold knives that serve the individual material web sections in the jaws of a folding cylinder.

With such a training, a first one is made Cross fold drawn in the middle of each material web section and the jaws of the folding cylinder then move the folded booklets alternatively on cylinders which these booklets by in Transport tongs lying on conveyor belts.

In a previously known folding machine of this type following the said conveyor belt trains another Cross fold device to form a further cross fold a certain point in the cross direction for the first time folded booklet may be provided.

That was done with the help of the perforation device Perforations are made at certain points on the material web, in which a first and, if necessary, a second one Cross fold is formed to cross fold the web of material between the folding blades of a transfer cylinder and the To facilitate clamping of a corresponding folding cylinder.

However, such a dowel-free folding machine is relatively complex and a relatively high frame is necessary because it positioned the one above the cross cutter Perforating device comprises, the web of material in the Folding machine reached after a vertical distance.

It therefore requires a large footprint and entails relatively high manufacturing costs.

To avoid the above disadvantages, the invention proposes a new cutting device for cutting a material web in a folding device of a rotating printing machine,  the function of cross perforation of said web integrated to the height and thus the space requirement of the Folding device with or without dowel in which the Cutting device is installed, to significantly reduce and thereby reduce their manufacturing costs.

The invention particularly proposes one Cutting device for cutting a web of material before as defined at the outset is characterized in that one the first and second cylinders a first perforation knife carries and the other carries a first perforation counter knife, around said cross-cut material web on one certain place on its width to form a first Perforate cross fold in said material web.

According to a particularly advantageous feature of cutting device according to the invention carry the first and second cylinder each another perforation knife, the such is trained with another one from the other one first and second cylinder perforated counter knife cooperates to said cross-section material web on two more symmetrical to the first cross fold positioned positions on their width to form a to perforate the second transverse fold in said material web.

According to a preferred embodiment of the cutting device according to the invention are the first Perforation knife and the first perforation counter knife too of the perforating cutting edge or perforating counter knife each positioned diametrically opposite.

In the embodiment in which the invention Cutting device several perforation knives and counter knives integrated, the first cylinder includes another Perforation knife and another perforation counter knife, each at a 90 ° angle to the cutting knife  are positioned, and the second cylinder also includes a another perforation knife as well as another Perforation counter knife, each at a 90 ° angle the cutting counter knife are positioned.

It is particularly advantageous if the cutting device according to the invention the first Perforation knife and the first perforation counter knife two angled to the first and second respective cylinders movable plates are arranged, the cylinders through Gears are positively connected to each other, the same with the cutting device with a transfer cylinder connecting mechanical intermediate parts so engaged stand that an angular process of said cutting knife a corresponding one compared to the pliers of the transfer cylinder angular process of the first perforation knife and counter knife opposite the cylindrical outer surfaces of the said first and second cylinders.

It is possible that the cutting device subsequent folding knife of the invention Transfer cylinders easily to the pliers of said Transfer cylinders are offset, with an identical offset the perforation knife and counter knife to the outer surfaces the cylinder allows the position of the perforations on the certain positions to set the first cross fold with a certain offset in the sections of the cross-section material web is to be formed.

It can also in the invention Cutting device may be provided that the angular alignment of said further perforation knives and counter knives the cylindrical outer surfaces of the first and second cylinders is manually adjustable.  

The invention also provides a dowel-free Folding device of a rotating printing machine, the Contains feed rollers which are designed to To pull material web, with a cutting device for Cross cutting the web and at least one Transfer cylinder with at least one folding cylinder cooperate to in said cross-section material web to form a first transverse fold, the folding device is characterized in that the cutting device with the device according to the invention is compliant and that at The independent perforating device is no longer required.

The invention is still based on the accompanying Drawings using non-restrictive Exemplary embodiments are explained in more detail below. It shows:

Fig. 1 is a plan view of a schematic representation of a paßstiftfreien folding machine according to the present invention;

Fig. 2 is a schematic view in cross section of a cutting device according to the invention and

Fig. 3 is a schematic side elevational view of the apparatus of FIG. 2.

In Fig. 1 is partially introduced 1 paßstiftfreie a folding machine for a rotary printing machine, in which a web of material, is shown.

The material web 1 is introduced into the folding machine after a vertical path. If necessary, it was previously folded in the longitudinal direction into two identical parts with the aid of a longitudinal folding device, not shown in the figures.

In this folding machine, two sets of stacked feed rollers 2 , 4 are provided, which pull the material web vertically in the direction of a cutting device upstream of the second set of feed rollers 4 .

This cutting device 5 , which will be explained in more detail later, makes it possible, on the one hand, to cut the material web 1 transversely, and on the other hand, to create three transverse perforation lines on the web width, one perforation line lying in a central part of each material web copy and two other transverse perforation lines arranged symmetrically to the first said perforation line are.

The copies of the perforated material web 1 are then moved by conveyor belt trains 6 , 7 to a transfer cylinder 8 to form a first transverse fold.

In a known manner, this transfer cylinder 8 carries transverse folding knives 9 and pliers 10 on its circumference, which are arranged uniformly distributed over the entire circumference of said transfer cylinder.

The conveyor belts of grooves 6 surrounding a part of the circumferential surface of the transfer cylinder 8 to which is applied to the surface of the transfer cylinder copies sufficiently support 11 provided gap to between the transfer cylinder 8 and the folding cylinder, wherein the copies at this point folded centrally in the transverse direction are.

For this purpose, each cross folding knife 9 of the transfer cylinder leads each material web copy into a jaw 30 in the region of the central perforation line in such a way that the copy is folded in the transverse direction along the said perforation line.

The jaws 30 thereby convey the folded material web booklets alternately for the first time along the said transverse perforation line to the cylinders 12 , 13 , which use pliers 31 to catch the said, folded material web booklets in order to bring them to other conveyor belt trains 14 , 15 .

The booklets then experience a second transverse fold to the right of the other perforation lines with the aid of a device (not shown in FIG. 1) for forming a second transverse fold.

In FIG. 2, the cutting device 5 in more detail.

This cutting device 5 comprises a first cylinder 5 a, the so-called cutting cylinder and a second cylinder 5 b, the so-called cutting counter-cylinder.

The first cylinder 5 a and the second cylinder 5 b are rotated simultaneously about their respective axes O, O '(both axes are running in parallel) by a system consisting of pinions 28.1 , 29.1 , which mesh and are mounted on drive shafts mounted on rotate the axes O, O '(see Fig. 3).

The first cylinder 5 a receives a cutting knife 16 for cooperation with a counter-cutting knife 17 mounted in the second cylinder 5 b in order to cut the material web 1 in the transverse direction, in the arrow direction F in the gap provided between the two cylinders 5 a, 5 b reached. Both cylinders 5 a, 5 b perform an "empty cut".

For this purpose, the first cylinder 5 a and the second cylinder 5 b comprise a coating 26 on a section of their outer surface adjacent to the cutting knife 16 or the cutting counter-knife 17 , which coating makes it possible to pull the material web in the direction of arrow F into the gap provided between the two cylinders to facilitate, and to hold them in such a way that the cut made by the cutting knife 16 cooperating with the counter-cutting knife 17 is clean and precise over the entire width of the said material web.

The coating 26 can be Velcro type (registered trademark) polyurethane or the like.

According to the embodiment shown in FIG. 3, the first cylinder 5 a also carries a first perforation knife 18 protruding from its outer surface and the other cylinder 5 b carries a first counterperforation knife 19 on its outer surface.

The first perforation knife 18 and the first perforation counter knife 19 serve to cooperate in order to perforate the said material web, which has just been cut across its width at a certain point by the cutting knife 16 cooperating with the counter cutting knife 17 , to form a first transverse fold in FIG said material web with the help of the transfer cylinder 8 , which cooperates with the folding cylinder 11 .

According to an alternative embodiment, not shown it can be provided that the arrangements of the first Perforation knife and the first perforation counter knife be exchanged, d. that is, the first perforation knife in the second cylinder, the cutting counter cylinder, and that the first perforation counter knife in the first cylinder, the Cutting knives are stored.

In the example shown, the first perforation knife 18 is diametrically opposite the cutting knife 16 with respect to the axis X, and the cutting counter knife 19 is also arranged diametrically opposite the cutting knife 17 on the second cylinder 5 b.

This arrangement is designed such that this Perforation line centered on everyone in the web cut copy is formed at the point where the is formed first cross fold such that said Material web copies are folded in two equal parts.

In addition, according to the example shown, the first and second cylinders 5 a, 5 b each carry a different perforation knife 20 , 22 , which is suitable for interacting with another counter perforation knife 21 , 23 , each carried by the other of the first and second cylinders, in order to to cross-cut said web of material across its width at two further locations symmetrically positioned with respect to the central transverse perforation line to form a second transverse fold in said web of material.

In particular, the other perforation knife 20 carried by the first cylinder 5 a is oriented at a 90 ° angle to the cutting knife 16 and the first perforation knife 18 .

Thus, the other perforation knife 20 lies on the circumference of the first cylinder 5 a half way between the cutting knife 16 and the first perforation knife 18 .

In addition, the other perforation counter knife provided on the surface of the first cylinder 5 a is positioned opposite the other perforation knife 20 , ie at a 90 ° angle to the cutting knife 16 and the first perforation knife 18 .

In a similar manner, the second cylinder 5 b carries another perforation knife 22, which is oriented at a 90 ° angle to the first perforation counter knife 19 and the counter-cutting knife 17 , and another perforation counter knife 21 diametrically opposite the other perforation knife 22 , so that it is at a 90 ° angle. Angle to the counter-cutting knife 17 and the first perforating counter knife 19 is aligned.

With such a design, the material web that comes in the direction of arrow F between the first and second cylinders 5 a, 5 b of the cutting device 5 is first cut transversely with the aid of the cutting knife 16 cooperating with the cutting counter knife 17 .

Then both cylinders 5 a, 5 b make a quarter turn, which drives the material web over a distance corresponding to a quarter length of the cut section, and another perforation knife 20 interacts with the other perforation counter knife 21 in the gap provided between the two cylinders, by a first To form a transverse perforation line over the entire width of the material web section at the point at which a second transverse fold is subsequently formed.

Both cylinders 5 a, 5 b then make a further quarter turn and the material web section is conveyed over a distance corresponding to a quarter length so that the first perforation knife 18 cooperates with the first perforation counter knife 19 in the gap provided between the two cylinders in such a way that on the Total width of the section of the separated material web, a second perforation line is to be formed in the middle of the section at the point at which a second transverse fold is later formed.

Finally, both cylinders 5 a, 5 b perform a further quarter turn in order to position another perforation knife 22 carried by the second cylinder and the other perforation counter knife 23 carried by the first cylinder in the gap provided between the two cylinders, the material web being one of the quarter lengths of the separated section is promoted corresponding distance to form a third perforation line on the entire width of the web, where a second cross fold is retrofitted.

Both cylinders 5 a, 5 b carry out a further quarter turn in order to again cut the material web transversely and to separate the material perforated from the material web 1 at three different locations.

Then you get at the exit of the cutting device Material web copies, the three cross perforation lines, one central perforation line and two each on a quarter and three quarters of the total length of the specimen dated Perforation lines arranged from the front edge exhibit.

Subsequently, these perforated copies are first for the first time folded in the middle, the second Perforation line is formed so that the other two Position the perforation lines one above the other.

Then a second cross fold is made on the right Side of the first and second superimposed Perforation lines formed.

At the exit, eight-page booklets for one Material web formed.

As shown particularly in FIGS. 2 and 3, the first perforation knife 18 and the second perforation counter knife 19 are mounted on two plates 24 , 25 which can be moved at an angle to the first and the second cylinders 5 a, 5 b.

These plates 24 , 25 are positively connected by pinions 29 , 28 which mesh with one another when rotated about the axes O ', O of said cylinders 5 a, 5 b.

These pinions 28 , 29 themselves are in connection with mechanical intermediate parts (not shown) which connect said cutting device 5 and transfer cylinder 8 in such a way that an angular movement of said folding knives relative to the pliers of said transfer cylinder causes an angular corresponding displacement of the first perforation and counter knife 18 , 19 against the cylindrical outer surfaces of the first and second cylinders 5 a, 5 b.

This structure makes it possible to achieve the same displacement of the perforation knife 18 and the perforation counter knife 19 with respect to the outer surfaces of the cylinders 5 a, 5 b in the case of an angular displacement of the folding blades 9 with respect to the pliers 10 of the transfer cylinder 8 and to achieve the perforation line in the longitudinal direction of the cut specimen offset so that it remains positioned on the right side of the first offset cross fold line.

In the same way, the angular orientation of the other perforation knives and counter-knives 20 , 22 , 21 , 23 relative to the cylindrical outer surfaces of the first and second cylinders 5 a, 5 b can be adjusted manually in accordance with an angular offset of the folding knives of the device for forming the second transverse fold.

In this embodiment, it is required that this change in the angular orientation of the others Perforation knife and the other perforation counter knife the rotating press is stopped.  

The present invention is by no means limited to that described and illustrated embodiments limited; the expert will attach any appropriate variant to it.

Claims (8)

1. Cutting device for cutting a material web ( 1 ) in a folding machine of a rotating printing press with a first cylinder ( 5 a) and a second cylinder ( 5 b), the first cylinder ( 5 a) receiving a cutting knife ( 16 ) which is suitable is to cooperate with a counter-cutting knife ( 17 ) mounted in the second cylinder ( 5 b) in order to cut said material web in the transverse direction, characterized in that one of the first and second cylinders ( 5 a, 5 b) has a first perforation knife ( 18 ) and the other carries a first perforating counter knife ( 19 ) in order to perforate said cross-section material web ( 1 ) at a certain point along its width to form a first transverse fold in said material web. 2. Device according to claim 1, characterized in that the first and second cylinders ( 5 a, 5 b) each carry a further perforation knife ( 20 , 22 ) which is designed with another of the other of the first and second cylinders worn perforating counter knife ( 21 , 23 ) to cooperate in order to perforate said cross-section material web ( 1 ) at two further locations across its width to form a second transverse fold in said material web. 3. Device according to one of claims 1 or 2, characterized in that the first perforation knife ( 18 ) and the first perforation counter knife ( 19 ) to the perforation knife ( 16 ) or perforation counter knife ( 19 ) are each positioned diametrically opposite. 4. Device according to one of claims 1 or 3, characterized in that the first cylinder ( 5 a) comprises another perforation knife ( 20 ) and another perforation counter knife ( 23 ), each at a 90 ° angle to the cutting knife ( 16 ) are positioned, and that the second cylinder ( 56 ) also comprises another perforation knife ( 22 ) and another perforation counter knife ( 21 ), which are each arranged at a 90 ° angle to the cutting knife ( 19 ). 5. Device according to one of claims 1 to 4, characterized in that the first perforation knife ( 16 ) and the first perforation counter knife ( 19 ) on two angularly movable to the first and second respective cylinders ( 5 a, 5 b) movable plates ( 24 , 25 ) are arranged, the cylinders being positively connected to one another by gearwheels ( 28 , 29 ) which are themselves in engagement with the mechanical intermediate parts connecting the cutting device with a transfer cylinder in such a way that an angular movement of the said relative to the pliers of the transfer cylinder a corresponding angular movement of the first perforating knives and counter-knives against the cylindrical outer surfaces of said first and second cylinders. 6. Device according to one of claims 2 to 5, characterized in that the angular orientation of said further perforating knife ( 20 , 22 ) and counter knife ( 21 , 23 ) to the cylindrical outer surfaces of the first and second cylinders ( 5 a, 5 b) are manually adjustable. 7. Device according to any one of the preceding claims, characterized in that the first perforation knife ( 18 ) in the first cylinder ( 5 a) and the first perforation counter knife ( 19 ) in the second cylinder ( 5 b) is mounted. 8. Dowel-free folding machine of a rotating printing machine, which comprises feed rollers ( 2 , 4 ), which are designed to pull a material web ( 1 ), a cutting device ( 5 ) for cross cutting the material web ( 1 ) and at least one transfer cylinder ( 8 ) cooperate with at least one folding cylinder ( 11 ) in order to install a first transverse fold in said cross-cut material web, characterized in that the cutting device ( 5 ) of the device according to one of claims 1 to 7 is compliant and that in the folding machine the independent perforation device not applicable.