DE102009052145A1 - Folding machine with a device for pressing - Google Patents

Abstract

The invention relates to a folding machine (100) for folding sheet - shaped elements (201, 202) having a first (2) and a second pocket folding station (4) and a transport table (3) arranged between the two pocket folding stations (2, 4) Transport direction (T2) of the arcuate elements (202) on the transport table (3) perpendicular to the transport direction (T1) in the first Taschenfalzstation (2).
In the first pocket folding station (2), a folding sequence is formed with a fold break (204) or a plurality of fold breaks (204)
and the transport table (3) has a device for pressing (30) at least one fold break (204) or a plurality of superposed fold breaks (204) of the last formed fold sequence of an arcuate element (202).
The device for pressing (30) comprises at least one press roller pair (31), which is transversely displaceable (a) to the transport direction (T2) of the transport table (3). As a result, an arcuate element (202) is specifically pressed in the critical region (205) of the seam breaks (204).

Description

The invention relates to a folding machine for folding sheet-like elements, in particular sheets of paper, with the preamble features of claim 1.

State of the art

Pocket folding machines and Schwertfalzmaschinen are known from the prior art. The combination of pocket folding machines with Schwertfalzmaschinen is common as Kombifalzmaschine. In this process, parallel folds are folded in pocket folders and cross breaks in the subsequent knife folders. The sheet passes through at least the following stations in the feed-through direction of the combination folding machine: feeder, transfer table, pocket folder, knife folder, delivery arm.

The construction of a Taschenfalzmaschine with a variety of Taschenfalzwerken goes out of the DE 10 2004 041 471 A1 out. A respective pocket folder consists of a folding pocket and three folding rollers, which are arranged in two pairs of folding rollers. From the DE 29 40 360 A1 is a single sword folding machine for folding of printed and pre-folded sheet known. Combination folding machines combine pocket folders and knife folders. Here are folded in a first folding station in Taschenfalzwerken parallel breaks and in a subsequent folding station in Schwertfalzwerken cross breaks. The DE 10 2006 055 301 A1 shows Kombifalzmaschinen with a plurality of Taschenfalzwerken and nachranging arranged Schwertfalzwerken.

In folding machines, it is well known to use display devices with press rollers. The signatures folded at different folding stations are transported between two press rollers mounted in parallel in the delivery station. The axes of the press rolls are arranged parallel to the last fold break and extend over the entire width of the delivery station. By pressing the signatures, the folds are to be pressed in order to avoid building up the signatures in the region of the folds during subsequent stacking of the signatures.

The DE 35 17 775 A1 shows such a device for pressing folded sheets. The device is connected after the last pair of folding rollers of a folding machine, so that the signatures can be pressed before stacking. By the device is to be prevented that trapped in the signatures residual air must be displaced by the press rolls abruptly. This is achieved in that the signatures to be pressed with their gutters are led forward obliquely through the press rollers. This is for the squeezing and displacement of the residual air a longer period of time available. In order to guide the signatures safely and defined during the oblique transport, upper bands are used in addition to the known bands of the transport table and the signatures are thus guided between upper bands and lower bands.

A disadvantage of these known from the prior art pressing devices is that trapped air can escape insufficiently from the signatures. Another disadvantage is that due to the rotary pressing by means of the press rolls parallel to the last fold, the pressing force of the press rolls acts only briefly on this last fold because of the lines of press rolls and fold. Building the signatures can thus be limited but not prevented. Another disadvantage is that the pressing devices only on the finished folded products, d. H. after the last folding, use.

Other press equipment, for example, in the EP 0 654 434 A1 , of the JP 620 16987 , of the DE 196 10 814 C1 , of the EP 1 213 245 A1 , of the DE 196 06 821 A1 and the DE 40 39 998 C2 described.

Object of the present invention is to provide a folding machine, which allows the production of high-quality signatures and wherein resulting in folding air cushion between the sheets of a respective signature are largely avoided. Another object of the invention is to make the folding machine so that it has no major space requirement. To achieve high processing speeds of the folding machine, the straight running of the arcuate elements should not be affected by Abpresseinrichtungen.

This object is achieved by a folding machine with the characterizing features of claim 1.

A folding machine according to the invention, which serves for the folding of sheet-shaped elements, in particular sheets of paper, has a first and a second pocket folding station. Between the first and second Taschenfalzstation a transport table is arranged, in such a way that the transport direction of the arcuate elements on the transport table is perpendicular to the transport direction in the first Taschenfalzstation. In the first pocket folding station, a fold sequence with a fold break or a plurality of fold breaks is formed in the arcuate element. The transport table advantageously has a device for pressing off at least one fold break or a plurality of superposed fold breaks of the last formed fold sequence of a respective arcuate element. The device for pressing off has at least one press roller pair, which is transversely displaceable to the transport direction of the transport table. The axis of a respective press roll is oriented transversely to the transport direction and thus transversely to the last fold break. By means of the folding machine according to the invention, it is advantageously achieved that a folding sequence with a fold break or a plurality of fold breaks is pressed off directly after the folding. The folded, arcuate elements are thus already fed to the second pocket folding station in the pressed-out state; fold breaks in the second pocket folding station can be carried out with greater accuracy and quality reductions due to pinching can be avoided. Due to the rectangular arrangement of the transport table relative to the first Taschenfalzstation and the arrangement of the device for pressing in the transport table - in other words: by the axes of the press rollers are aligned transversely to the last fold break - ensures that the press rollers as long as possible to a folding sequence of can act arcuate element. By using press rolls instead of press rolls extending across the width of the machine, it is achieved that the press force does not act on the entire arcuate element, but rather acts directly on the area of the fold break. This is ensured by the fact that the at least one press roller pair is transversely displaceable relative to the transport direction of the transport table and the at least one press roller pair can thus be displaced so that a respective effective range is in the region of a folding sequence. Overall, the uniformity and accuracy of the folding breaks and thus the quality of the folded products is significantly increased by the advantageous use of the adjustable press roller pair.

In an advantageous development of the folding machine according to the invention, a folding sequence with a fold break or a plurality of fold breaks is formed in the second pocket folding station. The folding machine further has a third Taschenfalzstation. Between the second and the third Taschenfalzstation a second transport table is arranged. The transport direction of the arcuate elements on the second transport table is perpendicular to the transport direction in the second Taschenfalzstation. The second transport table also has a device for pressing off at least one fold break or a plurality of fold seams lying one above the other of the fold sequence of an arcuate element last formed in the second pocket folding station. The device for pressing comprises at least one press roller pair, which is transversely displaceable to the transport direction of the second transport table. The folded products produced in the second Taschenfalzstation are thus supplied to the third Taschenfalzstation in the pressed state and in the third Taschenfalzstation a higher folding accuracy can be achieved.

In an advantageous development of the folding machine according to the invention, be it a folding machine with two or three Taschenfalzstationen, wherein in a last Taschenfalzstation a folding sequence is formed with a fold break or a plurality of fold breaks, the last folding station is arranged downstream of a last transport table. The transport direction of the arcuate elements on the last transport table is perpendicular to the transport direction in the last Taschenfalzstation. The last transport table also has a device for pressing off at least one fold fracture or a plurality of stacked fold breaks of the last formed fold sequence of an arcuate element. The device for pressing has at least one press roller pair, wherein this is transversely displaceable to the transport direction of the last transport table. In this advantageous embodiment, it is ensured that the last folding sequence is pressed off and the curved elements can subsequently be stacked without problems, since building up of the curved elements in the region of the last folding sequence is avoided by the pressing off.

In a particularly advantageous and therefore preferred embodiment, a respective transport table has an alignment ruler for aligning the arcuate elements, and the at least one press roller pair of the squeeze-out device is connected to the alignment ruler. As a result, the alignment ruler and the at least one pair of press rollers together are transversely displaceable relative to the transport direction of the transport table. With an adjustment of the alignment ruler of the transport table to the format of the arcuate elements, the position of the at least one pair of press rollers is set equal to.

In an advantageous development of the folding machine according to the invention, the distance between the press rollers of a respective pair of press rollers is adjustable. This adjustment can in particular also be automatic, for example by the use of electric motors or other actuators, which are directly controlled by the machine control of the folding machine. The distance of the press rollers is adjusted depending on how many layers has an arcuate element to be pressed, as well as depending on the grammage of the arcuate member and the desired pressing force. To set the effective pressing force is advantageously a provided additional device, the adjustment can also be done automatically in particular.

In an advantageous development of the folding machine according to the invention, the press rollers of a respective pair of press rollers are driven in opposite directions, in particular by a controllable electric motor. By being able to adapt the rotational speed of the press rollers to the transport speed of the arcuate elements in the region of a respective transport table, it is ensured that the press rollers do not produce any markings on the arcuate elements.

In an advantageous embodiment of the folding machine according to the invention, a respective press roller is mounted so that it is easily replaceable. This makes it possible to select a press roller which is optimal for the respective situation from a set of different press rolls with different widths and different surface properties of the lateral surface. In other words, the material properties of the arcuate element as well as the folding sequence with few or many fold breaks can be taken into account in the selection of a respective press roll.

In an advantageous development of the folding machine according to the invention, at least one of the transport tables has hold-down elements for holding down the transported curved elements. The hold-down elements may be, for example, hold-down balls or hold-down straps. The hold-down elements are - seen in the transport direction of the transport table - upstream and / or downstream of the at least one device for pressing attached. This ensures that the abzupressenden arcuate elements are passed safely between the press rollers of each press roller pair. A jam in the area of the device for pressing can thus prevented and the arcuate elements can be transported at high speed through the device for pressing through.

In an alternative embodiment, the at least one device for pressing has two pairs of press rollers. The second press roller pair is arranged at a distance parallel to the first press roller pair and is independent of the first press roller pair transversely displaceable to the transport direction of the transport table. This makes it possible that the first press roller pair can be set to a first folding sequence and the second press roller pair to a second folding sequence of an arcuate element. As an application example winding folds as well as zigzag folds are mentioned here.

The described invention and the described advantageous developments of the invention are also in any combination with each other advantageous developments of the invention.

With regard to further advantages and advantageous embodiments of the invention, reference is made to the dependent claims and the description of an embodiment with reference to the accompanying drawings.

Ausfürungsbeispiel:

The invention will be explained in more detail with reference to an embodiment. In a schematic representation:

1a : A plan view of a folding machine according to the invention with alignment ruler and means for pressing in a first position

1b a plan view of a folding machine according to the invention with an alignment ruler and a device for pressing in a second position

1c a plan view of a folding machine according to the invention with a means for pressing, which has two pairs of press rollers

2 a detailed view of the device for pressing

3a a folded sheet

3b an illustration of the Abpressvorgangs the signature 3a

4a a zigzag folded signature

4b an illustration of the Abpressvorgangs the signature 4a

5 a schematic representation of a folding machine with three Taschenfalzwerken and a downstream last transport table

1a shows a plan view of a schematic representation of a folding machine 100 , This has a sheet feeder 1 , by means of which bow 201 in a transporting direction T1 of a first pocket folding station 2 be supplied. In the first pocket folder 2 becomes the bow 201 once folded in the middle, so that as a folded product a signature 202 arises. This signature 202 is via a transport table 3 in a second transport direction T2 (which is perpendicular to the first transport direction T1), a second Taschenfalzstation 4 supplied in which the signature 202 can be folded even further. The transport table 3 has an alignment ruler 11 on, and a device for pressing 30 as well as hold-down elements 12 , which are designed as hold-down balls. In the picture of 1a are the hold-down elements 12 seen in the transport direction T2 downstream of the device for pressing 30 , It is particularly advantageous for such hold-down elements 12 also upstream of the device for pressing 30 to arrange. For better clarity was on their representation in the figures 1a . 1b and 1c waived. A signature 202 is coming from the first pocket folder against the alignment ruler 11 transported. In the area of the transport table 3 becomes the signature 202 transported along the alignment ruler. Through the device for pressing 30 , what a 2 is shown in more detail, undergoes the signature 202 in the area of her in the first pocket folder 2 produced Falzbruches a squeeze. To adapt to the format of the folded product 202 is the alignment ruler 11 transversely to the transport direction T2 displaceable, as indicated by the double arrow a. The device for pressing 30 as well as the hold-down elements 12 are with the alignment ruler 11 coupled so that they work together with the ruler 11 can be moved in the direction of a.

In 1b is the same folding machine 100 with the same components as in 1a shown. The arc 201 was in the first pocket folder 2 However, folded three times, so that a signature of smaller format is created. To the signature 202 the second pocket folder 4 in the center, the unit became alignment ruler 11 , Hold-down elements 12 and device for pressing 30 in the direction of a (seen in the transport direction T2 to the left) shifted.

1c shows the folding machine 100 as they already are in 1b has been described. The device for pressing 30 is in 1c realized in another embodiment: the means for pressing 30 has two parallel pairs of press rollers 31 , which in each case the pressing of another folding sequence of the folded product 202 serve. The right press roller pair seen in the direction of transport T2 31 is, as described above, together with the alignment ruler 11 postponed. The left pair of press rollers seen in the transport direction T2 31 can additionally independent of the sliding movement a of the alignment ruler 11 be moved transversely to the transport direction T2. As in 1c shown, was the left pair of press rollers 31 on the left in the transport direction T2 seen edge of the folded product 202 set.

In 2 is a device for pressing 30 shown in more detail. The device for pressing 30 owns a press roller pair 31 with an upper press roll 31.1 and a lower press roll 31.2 , The press rolls 31.1 and 31.2 can either be rotatably mounted or driven, for example, motor, in opposite directions. A respective folded product 202 is in transport plane E of the transport table 3 in the second transport direction T2 between the press rollers 31.1 and 31.2 moved through. The folded product experiences this 202 a squeeze. To set the effective pressing force, the device has to press 30 to a device for adjusting the pressing force 32 , Next has the device for pressing 30 a device for adjusting the distance of the upper press roll 31.1 from the bottom press roll 31.2 , which, however, in 2 not shown.

By the 3a and 3b and the 4a and 4b is the operation of the device for pressing 30 illustrated. In 3a is a bow 201 shown, which once centrally along a fold line 203 is folded. This creates a folded product 202 as it is in 3b is shown. The folded edge created during folding 204 lies on the further transport towards T2 of the folded product 202 at the alignment ruler 11 of the transport table 3 at. The press roller pair 31 the device for pressing is arranged so that the press rollers 31.1 and 31.2 on the folded edge 204 act and a squeezing of this folded edge 204 cause. As by the hatching 205 indicated, is the area of the folded product 202 , which experiences a pressing limited to the folded edge 204 and the immediately adjacent region of the folded product 202 , This targeted pressing a particularly accurate fold break can be achieved.

4a shows a folded product 202 with a plurality of fold breaks. The fold breaks or folded edges 204 lie one above the other. Such folds are commonly referred to as Zickzackfalz or accordion fold. To such a folded product 202 in the area of the folded edges 204 To be able to press off, a folding machine configuration is used, as in 1c is shown. As can be seen from the detailed sketch of 4b results, is a means for pressing 30 used, which two parallel pairs of press rollers 31 has. The right press roller pair seen in the direction of transport T2 31 acts, as already described above, on the right folded edge 204 one. To the transport direction T2 seen left folded edge 204 also press off was the left pair of press rollers 31 on the left outer edge of the folded product 202 set. The folded product 202 owns two pressure experienced areas 205 , which in each case the folding edges 204 and the immediately adjacent area.

In 5 is a folding machine configuration of a folding machine 100 outlined which three Taschenfalzstationen 2 . 4 . 5 has. Between the first pocket folder 2 and the second pocket folder 4 is a first transport table 3 arranged. Between the second pocket folder and the third pocket folder 5 is a second transport table 3.1 arranged. Then to the third Taschenfalzstation 5 and thus last Taschenfalzstation is a last transport table 3.2 arranged. The transport direction in the area of a respective transport table 3 . 3.1 . 3.2 is in each case perpendicular to the transport direction in the previous Taschenfalzstation 2 . 4 . 5 , The transport tables 3 . 3.1 and 3.2 each have facilities for pressing 30 , as already described above.

By using the facilities for pressing 30 each in the area of the transport tables 3 and 3.1 No additional space for pressing or a pressing device is required. The existing space is thus used better. At the same time there is a better Abpressung by squeezing after each folding station.

Alternative to in 5 illustrated last transport table 3.2 with device for pressing 30 can also be mentioned a conventional pressing device with over the width of the preceding folding station 5 extending pressing rollers are used. This pressing device is then traversed by the signatures without changing direction with the last fold break parallel to the press rollers.

LIST OF REFERENCE NUMBERS

1

investor

2

First pocket folder

3

transport table

3.1

Second transport table

3.2

Last transport table

4

Second pocket folder

5

Third pocket folder

11

aligning gauge

12

Retaining elements

30

Device for pressing

31

Press roller pair

31.1

upper press roll

31.2

bottom press roll

32

Device for adjusting the pressing force

100

folding machine

201

Bow / bow-shaped element

202

Folded product / signature / curved element

203

fold line

204

folding edge

205

Pressing experienced area of the folded product

a

Veschiebebewegung

T1

First transport direction

T2

Second transport direction

e

Transport level in the transport table

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102004041471 A1 [0003]
• DE 2940360 A1 [0003]
• DE 102006055301 A1 [0003]
• DE 3517775 A1 [0005]
• EP 0654434 A1 [0007]
• JP 62016987 [0007]
• DE 19610814 C1 [0007]
• EP 1213245 A1 [0007]
• DE 19606821 A1 [0007]
• DE 4039998 C2 [0007]

Claims (13)

Folding machine ( 100 ) for folding arched elements ( 201 . 202 ) with a first ( 2 ) and a second pocket folding station ( 4 ) and one between the two pocket folding stations ( 2 . 4 ) arranged transport table ( 3 ), wherein the transport direction (T2) of the arcuate elements ( 202 ), on the transport table ( 3 ) at right angles to the transport direction (T1) in the first pocket folding station ( 2 ), characterized in that in the first pocket folding station ( 2 ) a folding sequence with a fold break ( 204 ) or a plurality of fold breaks ( 204 ) and that the transport table ( 3 ) a device for pressing ( 30 ) at least one fold fracture ( 204 ) or a plurality of superposed fold breaks ( 204 ) of the last formed fold sequence of an arcuate element ( 202 ) and the device for pressing ( 30 ) at least one press roller pair ( 31 ) which transversely displaceably (a) to the transport direction (T2) of the transport table ( 3 ). Folding machine according to claim 1, characterized in that in the second Taschenfalzstation ( 4 ) a folding sequence with a fold break ( 204 ) or a plurality of fold breaks ( 204 ) is formed, that the folding machine ( 100 ) a third pocket folding station ( 5 ) and a second arranged between the second and the third Taschenfalzstation transport table ( 3.1 ), wherein the transport direction of the arcuate elements on the second transport table ( 3.1 ) at right angles to the transport direction in the second pocket folding station ( 4 ), and wherein the second transport table ( 3.1 ) a device for pressing ( 30 ) at least one fold fracture ( 204 ) or a plurality of superposed fold breaks ( 204 ) has the last formed fold sequence of an arcuate element and the means for pressing ( 30 ) at least one press roller pair ( 31 ), which is transversely displaceable (a) to the transport direction of the second transport table. Folding machine according to claim 1 or 2, characterized in that in a last Taschenfalzstation ( 5 ) a folding sequence with a fold break ( 204 ) or a plurality of fold breaks ( 204 ) and that the last folding station ( 5 ) a last transport table ( 3.2 ) is arranged downstream of the transport direction of the arcuate elements on the last transport table ( 3.2 ) at right angles to the transport direction in the last pocket folding station ( 5 ), and wherein the last transport table ( 3.2 ) a device for pressing ( 30 ) at least one fold fracture ( 204 ) or a plurality of superposed fold breaks ( 204 ) has the last formed fold sequence of an arcuate element and the means for pressing ( 30 ) at least one press roller pair ( 31 ), which transversely displaceable (a) to the transport direction of the last transport table ( 3.2 ). Folding machine according to one of the preceding claims, characterized in that a respective transport table ( 3 . 3.1 . 3.2 ) an alignment ruler ( 11 ) for aligning the arcuate elements ( 201 . 202 ), and the at least one press roller pair ( 31 ) of the device for pressing ( 30 ) and the alignment ruler ( 11 ) and together transversely displaceable (a) to the transport direction of the transport table ( 3 . 3.1 . 3.2 ) are. Folding machine according to one of the preceding claims, characterized in that the distance between the press rollers ( 31.1 . 31.2 ) of a respective pair of press rolls ( 31 ) is adjustable. Folding machine according to claim 5, characterized in that the adjustment takes place automatically. Folding machine according to one of the preceding claims, characterized in that a respective device for pressing ( 30 ) each having a device for adjusting the effective pressing force. Folding machine according to claim 7, characterized in that the adjustment takes place automatically. Folding machine according to one of the preceding claims, characterized in that the press rollers ( 31.1 . 31.2 ) of a respective pair of press rolls ( 31 ) are driven in opposite directions, in particular by a controllable electric motor. Folding machine according to one of the preceding claims, characterized in that a respective press roller ( 31.1 . 31.2 ) is mounted on one shaft and is easily replaceable. Folding machine according to claim 10, characterized in that the surface condition of the lateral surface of a respective press roller ( 31.1 . 31.2 ) and / or the width of a respective press roll ( 31.1 . 31.2 ) is optimized with respect to the sheet-shaped elements to be pressed. Folding machine according to one of the preceding claims, characterized in that at least one transport table ( 3 . 3.1 . 3.2 ) Hold-down elements ( 12 ) for holding down the transported arcuate elements ( 201 . 202 ) and the Hold-down elements ( 12 ) - in the transport direction of the transport table ( 3 . 3.1 . 3.2 ) - upstream and / or downstream of the at least one means for pressing ( 30 ) are mounted. Folding machine according to one of the preceding claims, characterized in that at least one device for pressing ( 30 ) two pairs of press rollers ( 31 ), wherein the second press roller pair is arranged parallel to the first press roller pair and transversely displaceable independently of the first press roller pair (a) to the transport direction of the transport table ( 3 . 3.1 . 3.2 ).

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