EP0627310B1 - Folding apparatus and method for crosswise folding - Google Patents

Description

The invention relates to a method for the transverse folding of webs and a folder to carry out the procedure.

From DE 36 14 263 C2 a folder of the type mentioned is known. He has two separate fold groups for the transverse folding of printed copies, whereby the in the one folding group still held in jaws of a jaw cylinder Print copy with one fed from the other fold group via ribbon cables second printed copy is placed one on top of the other. That kind of Merging the two printed copies can lead to deviations, that is, the alignment of the two printed copies to one another is not always exact. Further the known folder has a relatively complex construction.

Another folder of the type mentioned at the outset is known from EP-A-0 211 377. This folder has two partial web guides, as well as two folding knife cylinders are employed on the same jaw cylinder, with a special Folding jaw arrangement kept the printed products on the folding jaw cylinder separately and fed to the folded edges.

Another folding device is known from DE-C-449118.

The invention is therefore based on the object of a method of the type mentioned Kind as well as to create a folder for performing the method, in which a exact product processing, especially a precise folding result with a simple one compact structure can take place.

This task is carried out according to the characterizing part of method claim 10 and Device claim 1 solved.

According to the invention it is thus provided that the merging of several products on Folding jaw cylinder takes place, this merging simultaneously with the creation cross folding of at least one product happens. The multiple flap of the Folding jaw cylinders are provided, in which, for example, a first, folded product is held and which - preferably after which the jaw cylinder a partial rotation has passed - the further product is fed for folding, whereby it - in Interaction with a folding knife cylinder - forming the fold of one adjacent jaw of the multiple flap is added. This will make the both products brought together in a correctly aligned position. This Merging can, for example, take place precisely at the leading edge. Deviations, as in the prior art due to serving as a transport device Band lines can occur when merging the products are at Subject of the invention avoided due to the multiple flap. The construction of the The configuration according to the invention is simple and therefore inexpensive.

According to a development of the invention, it is provided that the jaw cylinder several folding knife cylinders are assigned to separate webs. If for example by means of the longitudinal cutting device mentioned from a former fed web two sub-webs are formed, so there are two separate webs before, each of which can be fed to a folding knife cylinder. In the course of this Registration can be a folding knife cylinder or the folding knife cylinder at the same time also be designed as a point cylinder, that is, they are suitable from the to fix the respective web of separated products. This can be fixed with, for example Puncture needles are made. Alternatively, it is also possible that the fixation by means of grippers he follows.

Since according to the above, the jaw cylinder assigned several, for example two, folding knife cylinders may be, it is possible that the respective separate Lanes (especially partial lanes) each with one Folding knife cylinders work together to separate products fed to the multiple flap. This is done in such a way that a first jaw of the multiple flap that of a first Folding knife cylinder receives upcoming product and that one another, second jaw of the multiple flap that of one other folding knife cylinder coming product jammed takes over. The inclusion of the products can be done in different angular positions of the jaw cylinder respectively. The arrangement of the folding knife cylinder different circumferential positions of the jaw cylinder leads to a space-saving design.

It is advantageous if the folding jaw cylinder has several Gripper cylinder for the optional supply of the Products are assigned to different discharge routes. These gripper cylinders are also located on different ones Circumferential positions of the jaw cylinder. Preferably can the folding jaw cylinder two folding blade cylinders and two gripper cylinders can be assigned. Because several Gripper cylinders are available with a very high Speed can be worked because of the multiple there are no bottlenecks. With two Discharge paths due to two gripper cylinders - compared to a solution with only one discharge path - the double the time available, so for example the second Longitudinal fold without affecting the Production speed can be carried out. By the larger product distances can do the specimens better delayed and more secure.

At least one of the gripper cylinders can preferably be one Have folding knife arrangement that with the The jaw cylinder interacts. By means of the Folding knife arrangement, it is possible for one product make further cross folds. An example comes from the Figure 5 and their description.

According to a preferred embodiment, that at least one of the discharge routes Longitudinal folding device is assigned. Depending on what you want Folded product can be folded here.

At least one of the gripper cylinders preferably points in this way trained or arranged grippers on that this only with one, in particular - in the direction of rotation of the Folding jaw cylinder seen - leading jaw or some jaws of the multiple flap cooperates. Hence this gripper does not work with all jaws Multiple flap together so that it is not all in the Multiple flap held products, but only part of it, that is, those in the Jaws are held with which the gripper cooperates. The remaining products can later by another gripper cylinder. Hereby it is possible to keep the products in the multiple flap to separate and, for example, several discharge routes feed.

According to a particularly preferred embodiment, the Multiple flap designed as a double rebate flap, that is, it has two jaws for independent of each other possible holding two products. In particular, the Double rebate flap a cylinder-fixed (jaw cylinder fixed) clamping web, that is, this The clamping web is not movable, but stationary on Jaw cylinder arranged. With the front respectively On the back of the clamping bar, one clamping jaw works together, to create the two clamping options mentioned above Clamping jaw with the interposition of the product against one side of the clamping web, this is how the clamp seat is created; the other jaw kicks against the other Side of the clamping web, there is a pincer-like holding device for the other Product.

The process according to the invention consists of the following process steps: The products are used for cross folding from a folding knife of a folding knife cylinder acted upon and clamped in the fold area to hold, while at the same time Clamping there is a transfer from the folding knife cylinder to a folding jaw cylinder, and wherein at least two products are merged in this way during the folding process and be held separately on the jaw cylinder so that they are in a desired relative position, in particular with congruent or approximately congruent fold edges are arranged adjacent to each other.

Fig. 1

eine schematische Ansicht eines Falzapparats,

Fig. 2-5

verschiedene Produkte (Falzprodukte),

Fig. 6

eine Schnittansicht eines Bereichs eines Falzmesserzylinders und eines Bereichs eines Falzklappenzylinders des Falzapparats der Figur 1,

Fig. 7

eine Darstellung gemäß Figur 6 mit Darstellung des Falzklappenzylinders und eines Bereichs eines weiteren Falzmesserzylinders,

Fig. 8

eine Darstellung gemäß Figur 7, jedoch in späterer, anderer Drehstellung der genannten Zylinder
und

Fig. 9

eine Schnittdarstellung im Bereich zweier Austragwege der Falzvorrichtung der Figur 1 mit Darstellung eines Bereichs des Falzklappenzylinders sowie zweier Greiferzylinder.

The drawing illustrates the invention using exemplary embodiments and shows:

Fig. 1

a schematic view of a folder,

Fig. 2-5

various products (folding products),

Fig. 6

2 shows a sectional view of an area of a folding knife cylinder and an area of a folding jaw cylinder of the folding apparatus of FIG. 1,

Fig. 7

6 shows a representation of the folding jaw cylinder and a region of a further folding knife cylinder,

Fig. 8

a representation of Figure 7, but in a later, different rotational position of the cylinder mentioned
and

Fig. 9

a sectional view in the region of two discharge paths of the folding device of Figure 1 showing a region of the jaw cylinder and two gripper cylinders.

Figure 1 shows - in a schematic representation - one Folder 1, the one former and a means symbolically arranged longitudinal cutting device 3 having. There are also four pairs of guide rollers 4, 5, 6 and 7 provided that are spaced apart below the Folding former 2 lie. Between the pairs of guide rollers 5 and 6 a transverse perforation unit 8 is arranged, the can optionally be used. The Guide roller pair 6 is assigned a deflection roller 9.

Furthermore, two folding knife cylinders 10 and 11 are provided each with a cutting cylinder 12 or 13 work together. Form the folding knife cylinders 10 and 11 also point cylinder. A jaw cylinder 14 acts with the two folding knife cylinders 10 and 11 together and is also in active function with two gripper cylinders 15 and 16. At least the gripper cylinder 15 is one Folded knife arrangement assigned so that it is one Cross-fold cylinder forms.

The gripper cylinders 15 and 16 close Discharge routes 17 and 18, respectively Longitudinal folding devices 19 and 20 are assigned. At the end of the discharge paths 17 and 18 there can be one Paddle wheel 21 and a delivery belt 22 may be arranged in Figure 1 - for the sake of simplicity - this only with the lower discharge path 18 is shown.

A web 23 runs into the former 2 of the folder 1, For example, a paper web, one that by means of Folding former 2 longitudinally folded or by means of Slitter 3 in two separate tracks (Partial webs 24 and 25) divided and on the funnel is turned on each other. The partial webs 24 and 25 become then products, preferably printed copies, by separation and folding. This will be discussed in the following discussed in more detail.

The jaw cylinder 14 has at least one, preferably several designed as multiple flaps 26 Folding flaps 27 and is also with usual, simple Folders 28 provided. The following will first focus on the received various folding products of Figures 2 to 5, which can be produced by means of the folder 1, among other things are.

Figure 2 shows a two-part folding product, each of which Part has a transverse fold 29. The two parts lie with their transverse fold 29 congruent and are provided with a "common" longitudinal fold 30. The word "Together" is intended to indicate that this longitudinal fold 30 in one Work process for both parts was made simultaneously is.

FIG. 3 shows a folded product, which also consists of two There are parts that - in contrast to the product of Figure 2 - but not on top of each other, but inside each other.

Figure 4 relates to a folded product of two parts, the are designed according to the parts of Figure 2, however not on top of each other, but separate parts (Folded products) form separately in the second two Longitudinal folds were folded.

Figure 5 shows a manufactured on the folder two - part product with separate first cross folds and common second cross fold.

From Figure 6, the construction of the as Multiple flap 26 trained folding flap 27 in more detail. The multiple flap 26 is in a recess 31 of the Jaw cylinder 14 arranged. In the following described in the form of a double rebate flap 32. The Double fold flap 32 has one relative to Folding jaw cylinder 14 stationary, immovable clamping web 33 on, with its front 34 and with its back 35 each have a pivotably mounted jaw 36 or 37 cooperates.

Each jaw 36 or 37 consists of several, spaced from each other over the length of the roller distributed clamping bars, so that the product along its length is clamped at several points.

In the following, the production of the folded product is according to Figure 2 explained in more detail. The fed to the former 2 Web 23 is by means of the slitter 3 in the Partial webs 24 and 25 divided and rotated 90 ° lengthways. The Partial web 24 is by means of a puncture device Folding knife cylinder 10 detected and - at the other end - separated by means of the cutting cylinder 12. Such a separated product 38 (Figure 6) is thus on the Outer surface of the folding knife cylinder 10 and is with the Rotational movement of this cylinder up to that in FIG. 6 position shown spent. Center to the front and Trailing edge of the product 38 or by half the amount of the leading or Nachfalzes moved from the center is on Folding knife cylinder 10 a folding knife 39 that - as soon as the Double folding jaw 32 of the folding jaw cylinder 14 in opposite position occurs - from a corresponding Control device of the folder is triggered that means that the folding knife 39 presses a loop into the product 38, the loop in that associated with the jaw 37, to the clamping web 33 existing clamping gap 40. The Clamping jaw 37 closes and takes the product under formation a transverse fold 29 - according to Figure 7 - in the course of the further Cylinder rotation with.

The partial web 25 is on a roller of the pair of pull rollers 6 deflected and guided over the deflection roller 9 and the Folding knife cylinder 11 fed. In interaction with the A corresponding cutting process takes place, as already with regard to the cutting cylinder 12 has been described. A cut off accordingly Product 38 ', which is from a puncture device of the Folding knife cylinder 11 is held and taken by means of a folding knife 41 in a clamping gap 42 in corresponding rotary position of jaw cylinder 14 and Folding knife cylinder 11 in the course of a loop formation introduced and there by closing the jaw 36 held clamped and due to the further rotation of the Cylinders 11 and 14 taken according to Figure 7. This will the transverse fold 29 carried out on the product 38 ', the Cross folds 29 of the products 38 and 38 'with exact edges - Only through the narrow clamping web 33 from each other separated - lying on top of each other. So it will be at the same time Folding process bringing products 38 and 38 'together performed.

In the course of further operation, they are placed on top of one another held products 38 and 38 'by means of appropriate grippers taken over by the gripper cylinder 15 or 16. It is possible that only the gripper cylinder 15 or only the Gripper cylinder 16 takes over or that the Gripper cylinders 15 and 16 work alternately, which the The advantage is that the following longitudinal folds in the second Longitudinal fold is available twice as long. The corresponding products are then created using the Longitudinal folding device 19 or 20 or the Longitudinal folding device 19 and 20 longitudinally folded, that is, it the longitudinal fold 30 is carried out. The so finished Product is from the paddle wheel 21 or from the paddle wheels the second longitudinal fold and the delivery belts 22 to hand over.

In order to produce a folded product according to FIG. 3, the Web 23 in the former 2 by means of Slitter 3 divided and then turned on each other. Then, however, the Single tracks 24 and 25, but these two tracks continue to run parallel to each other, i.e. they lie on each other and are only with one Folding knife cylinder (folding knife cylinder 10 or Folding knife cylinder 11) processed. In the following should only be discussed on the folding knife cylinder 10.

After separation by means of the cutting cylinder 12 the two superimposed pieces of the Partial webs 24 and 25 to the jaw cylinder 14 by by means of a folding knife of the folding knife cylinder 10 from a jaw 36 or 37 of the Double fold flap 32 can be detected and held, the That is, the double folding flap 32 is not for one Double clamp used, but like a simple folding flap second hand. The parts that are cross-folded this way either the upper or the lower delivery using the Gripper cylinder 15 or 16 supplied. It is also conceivable that an alternating delivery over both gripper cylinders 15th and 16 takes place, which allows an increased speed. in the A corresponding one will then take place during the course Longitudinal folding with the help of the longitudinal folding device 19 and / or 20. All described here The discharge paths 17 and 18 are exemplary embodiments preferably designed as belt sections.

The process for creating the product according to FIG. 4 takes place as well as when creating the product according to FIG. 2. Only when products 38 and 38 'are handed over to Special features of gripper cylinders 15 and 16 are provided. which are explained below.

It can be seen from FIG. 1 that the gripper cylinder 15 different grippers, namely short grippers 42 and long ones Has gripper 43. This is particularly clear from the Figure 9 out. By means of the long gripper 43, which as normal grippers can be seen and also with the Gripper cylinders 16 are present, all are individual Jaws 36 and 37 of a multiple flap 26 held Products 38, 38 'recorded and accepted. But comes - according to Figure 9 - the short gripper 42 of the gripper cylinder 15 for Use, this only takes the product 38 of the - in Direction of rotation seen - leading jaw 36 while - In the course of further rotation - the (long) gripper 43 of the Gripper cylinder 16 the product 38 'of the lagging Clamping jaw 37 takes over. So that's how it is possible to separate the products 38 and 38 'and according to the discharge paths 17 and 18. Hereby arises - each time after the missing Longitudinal folding - the product of Figure 4.

In addition to the transverse fold 29 of the products, according to FIG. in the interaction of jaw cylinder 14 and Gripper cylinder 15 another cross fold possible. This can, for example, in the products according to FIGS. 2 and 3 be performed. Such an arrangement can also Are used to carry out delta folds. This is then a corresponding offset of the facilities required. To be able to make the second cross fold will the corresponding product from the corresponding Grippers of the gripper cylinder 15 taken over, however no removal takes place. Rather, the gripper cylinder 15 at least one folding blade arrangement 44 is provided, the one Loop the product into an appropriate simple Fold jaw 28 of the jaw cylinder 14 brings. By Closing the folding flap 28 is the second loop Cross fold formed and the product accordingly under open the gripper of the gripper cylinder 15 from the Folding jaw cylinder 14 taken and finally by means of the gripper cylinder 16 carried out. This is it possible to manufacture products according to Figure 5.

When choosing a short gripper 42 or a long gripper 43 becomes a corresponding one Rotational position offset between the jaw cylinder 14 and the gripper cylinder 15 made. Due to the Multiple flaps 26 are the folds held there on the circumference slightly offset. This could lead to a discrepancy in the stack the products. Is a compensation thereby possible that the corresponding folding knife penetrate to different degrees into the clamping gap, whereby a correspondingly more or less large loop is formed becomes what leads to compensation.

Claims (10)

1. Folder for the transverse folding of products, preferably printed copies, separated from a web, in particular by means of a longitudinal cutting device from a longitudinally cut partial web, having at least one transverse folding device which has a folding blade cylinder and a folding jaw cylinder, characterized in that the folding jaw cylinder (14) has at least one folding jaw (27) which is designed as a double jaw (32) and has a common, fixed clamping jaw for the collating holding of two products (38, 38') taking place simultaneously during the transverse folding.
2. Folder according to Claim 1, characterized in that a plurality of folding blade cylinders (10, 11) for separate webs (24, 25) in each case are assigned to the folding jaw cylinder (14).
3. Folder according to Claim 1, characterized in that the folding blade cylinders (10, 11) have holding devices, in particular point-hole devices or grippers, for the products (38, 38').
4. Folder according to Claim 1, characterized in that a plurality of gripper cylinders (15, 16) for the selectively possible feeding of the products (38, 38') to different delivery paths (17, 18) are assigned to the folding jaw cylinder (14).
5. Folder according to Claim 4, characterized in that at least one of the gripper cylinders (15, 16) has a folding blade arrangement (44) which interacts with the folding jaw cylinder (14).
6. Folder according to Claim 4, characterized in that at least one of the delivery paths (17, 18) is assigned a longitudinal folding device (19, 20).
7. Folder according to Claim 4, characterized in that at least one of the gripper cylinders (15, 16) has grippers (42, 43) which are designed in such a way that they only interact with one, in particular leading - seen in the direction of rotation of the folding jaw cylinder - clamping jaw (36) or some of the clamping jaws of the multiple jaw (26).
8. Folder according to Claim 1, characterized in that the multiple jaw (26) is designed as a double folding jaw (32).
9. Folder according to Claim 8, characterized in that the double folding jaw (32) has a clamping web (33) which is fixed to the cylinder and by means of whose front and rear side (34, 35) a clamping jaw (36, 37) interacts in each case.
10. Method for the transverse folding of products, preferably printed copies, separated from a web, in particular from a partial web cut longitudinally by means of a longitudinal cutting device, the products being acted upon for transverse folding by a folding blade of a folding blade cylinder and a transfer taking place from the folding blade cylinder to a folding jaw cylinder, the folding jaws of which fold and hold the product in the folding region, characterized in that the configuration of at least one folding jaw (27) as a double jaw (32) having a common, fixed clamping jaw enables two products (38, 38') to be collated and held on the folding jaw cylinder (14) in such a way that they are separate from one another, lying adjacently one above the other.

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