DE2640110C2 - Folding unit in a folder for web-fed rotary printing presses - Google Patents

Description

The invention relates to a folder in a folder for web-fed rotary printing presses according to the preamble of claim 1.

Such a folding unit is known from CH-PS 5 05 695 (FIG. 9). It serves one - usually Longitudinally folded - paper webs in or to be cut several times per forme cylinder circumference and not collected or, in the case of several uses, on Form cylinder circumference, to be folded crosswise accordingly.

In the known arrangement, for this purpose, a collecting cylinder holding five products is next to a folding cylinder that can hold two products but is equipped with only one folding jaw and another such folding cylinder employed. In the case of non-collecting production, both folding cylinders then take turns one product each from the collecting cylinder, fold it and pass it on to a paddle wheel each. In the Collective production, one of the two folding cylinders is rendered ineffective, so that the other but then because of the odd number of products on the collecting cylinder double product takes off, folds and attaches to the associated paddle wheel

ίο passes on

However, it is often desirable, in addition to this normal collection and non-collection production, too Produce printed products that are only half the format in the running direction of the paper web and do not have a cross fold

is and then either in a separate folding unit received a further longitudinal fold or only provided with the first longitudinal fold, for example as a book cover or as a newspaper insert in a magazine or Tabloid form, find use. For this it is necessary with the known folding unit, the folding unit largely to be exchanged. However, this is time-consuming and costly and mostly the achievable benefit not appropriate.

In contrast, the invention is based on the object of providing a folder in a folder for Modify web-fed rotary printing presses of the type mentioned so that it is at relatively little modification is suitable for both normal and half-format production.

This is achieved according to the invention by the features of the characterizing part of claim 1.

Here you only need in the cutting cylinder for each existing cutting knife for this conversion an additional cutting knife with a row of punctures or grippers and in the folding cylinder for each existing folding jaws a row of punctures or grippers installed as well as in the collecting cylinder for each existing one Cutting groove to be provided an additional cutting groove.

This conversion can snow! and carried out easily and, if necessary, also with an already existing one Folder are made possible. It increases the utility value of a printing press quite considerably without their actual mode of operation in some way

<5 affect.

As with the known arrangement, here the products are alternately at two different locations designed so that there is a sufficient gap between two products A quick succession of the half-format products ensures safe delivery. With normal Production can, however, also take place here at a single point. The establishment after the The invention has the further advantage that it requires a cylinder less, because the function of the further folding cylinder of the known arrangement is taken over here by the cutting cylinder.

According to embodiments of the invention, the folding blades of the collecting cylinder !, carrying folding blade bars be exchangeable for grooved bars, which each have one of the further cutting grooves, or it can carry the folding blades of the collecting cylinder for the recording each one of the other cutting grooves set up and the

μ folding knife when using the other cutting knives, Cutting grooves and puncture needles or grippers can be set out of function.

In the following the invention is based on the

Drawing explained in more detail in an exemplary embodiment. It shows

Fig. I is a side view of the folder in a schematic representation,

Fig.2 a normal, uncollected product of the Device according to fig. I and

Fig.3 a product of this facility in their Mode of operation according to the invention.

F i g. 1 shows a combined grooving, folding knife and collecting cylinder 1 - briefly as a collecting cylinder denotes -, the one with a cutting cylinder 3 and a jaw cylinder or folding cylinder 5 for short Cooperation The cutting cylinder 3 is divided into two parts and has its Circumference two cutting knife 7, which with corresponding Cutting grooves 9 cooperate in the circumference of the collecting cylinder 1. The collecting cylinder 1 is divided into three parts and accordingly has three of these cutting grooves 9.

The folding cylinder 5 is again divided into two parts and has two opposite sides on its circumference Faizkiappen Π. The Faizkiappen 11 cooperate Folding knives 13 together on the circumference of the collecting cylinder 1 in the middle between two Cutting grooves 9 are arranged.

When this device is in operation, a paper web 19, for example from a former not shown here, inserted between collecting cylinder 1 and cutting cylinder 3. After every half revolution of the cutting cylinder 3, one of the cutting knives 7 takes place between them and one of the cutting grooves 9 is a cut that cuts the paper web 19 into sheets of the length of a panel distributed. The beginning of each arc is from. a row of puncture needles 15 on the circumference of the collecting cylinder 1 detected, of which the sheet then moves around the collecting cylinder 1 from the cutting cylinder 3 to the folding cylinder 5 to be led. If then the folding knife 13 lying in the middle of the sheet is just a folding jaw 11 opposite, the folding knife 13 pushes the sheet into the folding jaw 11, causing it to be folded and is held, so that it then subsequently from the folding cylinder 5 into a paddle wheel 21 and from there on a boom 23 can be stored.

The result of this folding is the product shown in FIG. 2, in which a longitudinal fold can be seen is, on which the transverse fold is superimposed by the folding cylinder 5 - shown here in the vertical direction.

For the production of folded products of the type shown in Fig. 3 shown type, which carry only one longitudinal fold, which is already incoming between the draw rollers 17 Has had paper web, the cutting cylinder 3 must now between two of the cuts mentioned with the Cutting knives 7 make another cut. Do this in the middle between the two Cutting knives 7 two further cutting knives 25 attached, which in turn again with further cutting grooves 27 cooperate in the circumference of the collecting cylinder 1. The other cutting grooves 27 are also located each in the middle of the normal cutting grooves 9 and thus approximately at the location of the folding knives 13,

With the help of the other cutting knife 25 is each

cut off the rear half of an arc held by the puncture needles 15. To capture the These second halves start at each

further cutting knife 25 a number of puncture needles 29 are provided, which, however, only serve the to guide the second half of the arch until it ends

ίο collecting cylinder 1 has come free. She will then designed below the cutting cylinder 3

For this purpose is below the collecting cylinder 1

and the cutting cylinder 3, a further paddle wheel 31 is provided, from which the products to a

is to be passed on below the boom33.

The first halves of the arch go the same way as

previously the whole arch; they are then also taken over by the folding cylinder 5 and transferred to the paddle wheel 21

. submitted. For this purpose, at the circumferential point of the folding cylinder 5, where the sheet beginnings are each at the time of handover there is a row, that is, in the middle between two Faizkiappen 11, wifjer a row further puncture needles 35 are provided, which the beginning of the arc of the puncture needles 15 of the Samm / .ylinders 1 take over.

The incoming paper web is therefore not, as in normal operation, in sheets, but in half sheets divided, of which the first, in the schematic representation according to F i g. 1 shown in dashed lines, from The collecting cylinder 1 is gripped, passed on to the folding cylinder 5 and from there into the paddle wheel 21 is delivered. The second half-arc, on the other hand, is only briefly captured by the cutting cylinder 3 and transferred to the Bucket wheel 31 delivered.

Since only every second semicircle has to be deposited on each paddle wheel 21, 31, the requirements are there for a clean and operationally safe filing considerably mitigated. As indicated, they succeed Products always with the same space between the compartments 37 to 39 and 41 to 43 des Bucket wheel 31 or 21, so that it hardly happens ku / in that products to be deposited in front of the Can interfere with the paddle wheel.

The function of the folding knife i3 must be switched off in this operating mode. To do this will be expediently the folding knife bars, which carry the folding knives 13, exchanged for grooved bars, which have the further cutting grooves 27. However, the folding cutter bars can also be used be provided with the cutting grooves 27, if it is ensured that the folding knives 13 except when necessary Function can be set.

Since the puncture needles 15,29,35 punctures in the edge of the Products can * in those cases where these interfere (and no value is placed on the higher working speeds that can be achieved with them will), grippers can also be provided instead of the puncture needles.

1 sheet of drawings

Claims (3)

Patent claims: 1. Folding unit in a folder for web-fed rotary printing presses with a combined grooving, folding knife and collecting cylinder, a cutting cylinder and a folding cylinder, in which the cutting cylinder has a number of equally spaced cutting knives on the circumference of the collecting cylinder and cooperate with puncturing needles or grippers provided cutting grooves, in which the folding cylinder has a number of equally spaced folding jaws on the circumference, which cooperate with folding knives arranged centrally between the cutting grooves on the circumference of the collecting cylinder, in which behind the folding cylinder a paddle wheel with an arm for a The first stream of products to be laid out by the folding cylinder is provided and in which there is a further paddle wheel with an extension arm for a second stream of products, characterized in that the cutting cylinder (3) is in each case centered between two cutting knives (7) has a further cutting knife (25) for halving the products, to which a row of puncturing needles (29) or grippers for gripping the rear half of the products is assigned, so that the collecting cylinder (1) is centered between two cutting grooves (9) the place of the folding knives (13) carries a further cutting groove (27), which can interact with one of the further cutting knives (25), and that the Fr'z cylinder (5) in the middle between two folding flaps (11) has a number of further puncturing needles * _V 35) - ^ betw. Has grippers for gripping the front half of the products, which can interact with the puncturing needles (15) or grippers of the collecting cylinder (1). 2. Folding unit according to claim 1, characterized in that the folding blades (13) of the collecting cylinder (1) load-bearing folding knife bars are interchangeable with grooved bars, which each have one of the have further cutting grooves (27). 3. Folding unit according to claim 1, characterized in that the folding blades (13) of the collecting cylinder (1) load-bearing folding knife bar for receiving one of the further cutting grooves (27) are set up and that the folding knives (13) when using the further cutting knives (25), Cutting grooves (27) and puncture needles (35) or grippers can be deactivated.