DE102007062863A1 - Device for clamping waves - Google Patents

Abstract

The invention relates to a device (100) for clamping two mutually parallel rotating shafts (1, 2) in a printing material processing machine, wherein the shafts (1, 2) each carry at least one processing tool. The device has two bearing inner rings (3), wherein each a bearing inner ring (3) on a respective shaft (1, 2) can be pushed and fastened on this, and wherein the bearing inner rings (3) each equidistant from a shaft end of the respective shaft (1, 2) are spaced. Next, the device has two bearing outer rings (5, 7), wherein each a bearing outer ring (5, 7) on the bearing inner ring (3) can be pushed, and wherein between bearing inner ring (3) and bearing outer ring (5, 7) is a bearing. A band (6) is looped around both bearing outer rings (5, 7) and fastened to one of the bearing outer rings (7) at its two ends (6.1, 6.2). The invention also relates to a device (100) which, instead of a band (6), generates the tension by means of screws (21) or other elements.

Description

The The invention relates to a device for bracing waves according to claim 1 and claim 9.

The EP 1 475 334 A1 shows a folding machine with a pair of knife shafts. The knife shafts are mounted parallel to each other between two spaced side walls of the folding machine. In order to be able to cut, perforate, crimp or press folded paper sheets perpendicular to a folding line, ie in the direction of sheet travel, pairs of knife shafts are arranged upstream or downstream of the folding rollers of a folding unit. These are usually knife shaft pairs, in which one blade shaft is equipped with tools and the other blade shaft with counter tools. The tools are mounted on tool holders, which are pushed onto the knife shafts.

Problematic on such blade shafts is that, depending on the properties of the paper and unfavorable arrangements of the tool in the middle of the knife shaft pair and depending on the type the tools a bending of the knife shafts occurs while a respective sheet of paper passes the knife shafts and from the Editing tools is edited. For paper of high grammage and for bows that have already been folded several times is the bend the knife shafts particularly large. The storage of the knife shafts in the side walls of the folding machine, which allows that the knife shafts are moved apart against the force of a spring Be allowed, this bending movement. The bend However, additionally causes a concave deflection of the Cutting shafts. The deflection of the knife shafts is problematic because the processing of a passing fold sheet then no longer is ensured or at least not with the necessary Accuracy can be performed.

Around to address this problem has been tried by the machine operator so far to arrange the tools on the blade shafts as eccentrically as possible, to keep the bending moment and the deflection of the waves low. Due to the folding positions specified for a product However, such an adjustment is only conditionally possible. Further and alternatively were used to reduce the forces on Pair of blades and to reduce the deflection of the waves Tools from the machine operator on a subsequent knife shaft pair arranged, if the machine has such. However, the set-up time of the machine is thereby unfavorable extended.

task It is therefore an object of the present invention to provide a device which prevents the bending of the waves or at least minimized and a correct and accurate processing of the substrate allowed.

Solved This object is achieved by a device for bracing according to claim 1 and claim 9.

In a first embodiment, the device has the Clamping two parallel rotating Shafts in a substrate processing machine two bearing inner rings, two bearing outer rings and a clamping element. at The element to brace is, for example, screws, Clamps, pliers, ropes or the like, advantageously but a band. The shafts each carry at least one machining tool, which is usually a tool on one and the other Counter tool on the other wave is. On each of the two Shafts is ever a bearing inner ring pushed, fastened on the shaft and thus secured against displacement and rotation on the shaft. If the bearing inner rings are the same size, then they are each equidistant from a shaft end of the respective shaft, d. H. the faces of the two bearing inner rings are in a plane. Different sized bearing inner rings are arranged so that the lateral surfaces parallel to each other and are spaced. On a respective bearing inner ring is ever a bearing outer ring pushed on. Between bearing inner ring and bearing outer ring is a bearing which the Rotation of the bearing inner ring relative to the bearing outer ring allows. The two bearing outer rings are replaced by the element for Bracing against each other braced. Is it the element around a band, so this is advantageous to the two bearing outer rings looped, and at its two ends on one of the bearing outer rings attached.

In an advantageous embodiment of the invention is that Band at its first end by means of a bolt firmly with the one Bearing outer ring connectable and at its second end by means a bolt in a slot of a bearing outer ring feasible. In the area of the second bearing outer ring the tape is not attached, but lies there only on the lateral surface of the bearing outer ring. In this area it comes to a Friction pairing between band and lateral surface.

Further, the means for clamping has a spring mechanism which counteracts the movement of the second end of the band in the slot of the bearing outer ring. The spring mechanism thereby causes a tension of the two waves, which is the deflection of the waves counteracts.

In a particularly advantageous embodiment of the invention the band is firmly connected to the first pin at its first end and the bolt is in a bore of a bearing outer ring suspended. At its second end, the band is stuck with connected to the second bolt and the bolt is in the slot can be suspended from the outer bearing ring. In alternative Solutions are the bolts each with the bearing outer ring connected and the tape has at its two ends in each case a hole and is thereby suspended in the bolt.

In An advantageous development of the invention is the spring mechanism Part of a cuff which can be pushed onto the bearing outer ring. The spring mechanism has a plastic spring, which is the Movements of the second end of the band, d. H. the movements of the second bolt in the slot, counteracts. At the plastic spring it may in particular be an elastic cylinder.

In a first embodiment, the band wraps around the Bearing outer rings in the shape of an oval. The course of the Bandes is as follows: at its first end is the band with firmly connected to the first bearing outer ring. The band will on a part of the lateral surface of the first bearing outer ring led, subsequently loses contact with the first bearing outer ring and is thereby tangential to first bearing outer ring and led to the introduced second bearing outer ring. below, over a length of half the circumference of the second bearing outer ring, the band is on the lateral surface of the second bearing outer ring guided along. Then the band loses contact again with the second bearing outer ring and is tangential to second bearing outer ring continued until it again comes into contact with the first bearing outer ring. The ribbon is on a short distance on the lateral surface of the first bearing outer ring continued and with his second end hung in the slot.

In a second, particularly advantageous, compact construction variant, The band wraps around the bearing outer rings in the form of a Eight. The course of the band is as follows: At its first end is the band by means of a bolt in the first bearing outer ring attached and immovable. The tape goes along the outer surface led the first bearing outer ring, up to the Place where the lateral surfaces of the first and second Bearing outer ring are closest. At this point The band comes off the first bearing outer ring and is brought to the second bearing outer ring. The second bearing outer ring is almost complete of the band entwined and the band lies on the lateral surface of the second bearing outer ring. When the tape returns to the spot reached at the distance of the lateral surfaces of the first and second bearing outer ring is the lowest, the Tape lifted from the second bearing outer ring and to the first bearing outer ring introduced. The tape is subsequently on the second Bearing outer ring on and is on the lateral surface continued the first bearing outer ring, and finally at its second end by means of a bolt in a located in the first bearing outer ring slot hooked.

In an advantageous embodiment is the band around a metal band, in particular a steel band. This is inexpensive to manufacture and meets the requirements in terms of strength and elasticity.

In a second embodiment has the device for clamping two mutually parallel rotating Shafts in a substrate processing machine two bearing inner rings, two bearing outer rings and two sleeves. A respective one Shaft carries at least one machining tool, where one shaft is the tool and the other shaft is the counter tool wearing. On each of the two shafts is ever a bearing inner ring slidable, attachable to the shaft and thus against displacement and twisting on the shaft backed up. Are the bearing inner rings the same size, they are each equal to one Shaft end of the respective shaft spaced, d. H. the faces The two bearing inner rings lie in one plane. Different sizes Bearing inner rings are arranged so that the lateral surfaces parallel to each other and spaced. On a respective bearing inner ring is ever a bearing outer ring pushed on. Between bearing inner ring and bearing outer ring is a bearing which the Rotation of the bearing inner ring relative to the bearing outer ring allows. A cuff is each on a bearing outer ring slidable and the cuffs can by means of screws be connected to each other.

In a particularly advantageous embodiment, the one sleeve has holes through which the screws can be inserted through, and the second sleeve has threaded holes into which the screws can be screwed. The screw heads are each backed with a spring-elastic element, such as a spring-elastic plastic bushing or a plate spring. The threaded holes for screwing the screws can either be cut directly into the main body of the sleeve or the threaded holes are in an additional separate element which is rotatably received in the sleeve, such as a nut. Alternatively, the functionalities of the cuff, ie the poss Possibility of screwing, already be integrated into the bearing outer rings and sleeve and bearing outer ring be designed as a part.

In an alternative embodiment can also be a respective Bearing outer ring be made in several parts.

In a particularly advantageous development of the aforementioned Variants and embodiments are in the Bear around a needle bearing. Alternatively, space-saving Plain bearings are used.

In a particularly advantageous further development of the previously described Variants and embodiments is a respective bearing inner ring by means of a releasable locking element on the respective Shaft attachable. The locking element may be, for example to act a clamping screw which is screwed into the bearing inner ring, in the screwed state with her foot on the shaft presses and thus the bearing inner ring against twisting and Moves secure.

at the machining tools are either creasing, perforating or cutting knife to prepare a fold or bow or rollers for pressing the substrate to the product to press after a successful folding.

A Such means for clamping advantageously comes in a folding machine for clamping a knife shaft pair used. If it requires the strains of the waves, too two or more devices are used for bracing.

The invention also relates to a method for bracing two parallel arranged shafts of a substrate-processing machine with a device for clamping with a belt as described above. The machine is set up as follows:
In a first step, tools and / or tool carriers are pushed onto the two shafts. Subsequently, at least one bearing inner ring is pushed onto a respective shaft. On a respective bearing inner ring a bearing outer ring is pushed. The waves thus prepared are brought into their working position. There, the positioning of bearing inner rings, tools and / or tool carriers takes place relative to each other. Ie. the tools and / or tool carriers on the one shaft are positioned so that they interact with the tools or counter tools of the other shaft. The bearing rings are positioned so that the end faces of the bearing inner rings are in one plane. The thus positioned bearing inner rings, tools and / or tool carrier are locked on the shafts. In the next step, the suspension of the band takes place, which causes the tension of the two waves. In this case, the first pin of the tape is hung in the bore of the first bearing outer ring, the bearing outer rings are wrapped with the tape and the second end of the tape is hooked by a bolt in the slot of the first bearing outer ring. Now the cuff can be pushed and the tension of the two shafts adjusted by the spring mechanism.

Especially It is advantageous that the tension even in a short Machine stop to be readjusted while processing a job can. Should set up the machine for a job unclear whether the waves are braced against each other must be, so the bearing rings can already be mounted and positioned from the beginning. The last two above steps, hanging the tape and the sliding of the cuff with adjusting the tension, can however, they are reset and will only be available if needed carried out.

Becomes for clamping two shafts parallel to one another a printing material processing machine means for Warping in the second embodiment described above used without tape and with screws, so the adjustment takes place the bracing as follows: both the pushing on of tools, Bearing inner rings, bearing outer rings, the positioning of Tools and bearing rings as well as the locking of bearing inner rings and tools are analogous as described above. In the next step is ever a cuff on a respective bearing outer ring postponed. The screws are put in the cuff and screwed. The number of revolutions determines the spring force, with which the two waves are braced against each other.

in the Operation of the printing material processing machine rotate the bearing inner rings with the waves and the bearing outer rings are unmoved. The Device for clamping becomes effective when the editing tools to be passed on the waves of a substrate.

Regarding Further advantageous embodiments of the invention is based on the Subclaims and the description of an embodiment below With reference to the accompanying drawings.

Embodiment: The invention will be based on an embodiment yet be explained in more detail. It show in more schematic Presentation:

1a a device for clamping two shafts in a first embodiment during assembly.

1b : A plan view of the upper bearing outer ring in the uninstalled state

1c : a detailed view of the tape

2 : the same device for clamping two shafts in the assembled state.

3a : the same device from a wider angle

3b a section of a sectional view of a vertical section perpendicular to the axis of the bearing outer ring of 3a at the position of the clamping force adjustment screw

4 A second embodiment of a device for clamping two shafts in the assembled state.

In 1a are two knife shafts 1 and 2 , which are arranged parallel to each other, indicated. On a respective knife shaft 1 . 2 there is a clamping ring with bearing inner ring 3 , The bearing inner ring is not visible, as this under the bearing outer ring 5 respectively. 7 located. A respective clamping ring 3 has a clamping screw 4 , by means of which the clamping ring 3 and thus the bearing inner ring on the blade shaft 1 respectively. 2 is attached. On the bearing inner ring 3 the knife shaft 2 is a bearing outer ring 5 postponed. On the bearing inner ring 3 the knife shaft 1 is a bearing outer ring 7 postponed. Between the bearing inner ring 3 and the bearing outer ring 5 respectively. 7 there is a warehouse, which is not visible.

The bearing outer rings 5 and 7 are from a band 6 entwined in the shape of an eight.

The bearing outer ring has a bore 7.1 and a slot 7.2 , 1b shows a plan view of the bearing outer ring 7 with the slot 7.2 and the hole 7.1 , As in 1c is the first end 6.1 of the metal band 6 with a first bolt 6.3 provided, the second end 6.2 with a second bolt 6.4 , Bolts 6.3 and 6.4 are at the band 6 screwed. Alternatively, the bolts can 6.3 and 6.4 also by a welded connection or by riveting with the band 6 get connected.

As in 1a pictured, became the band 6 at its first end 6.1 by means of the first bolt 6.3 into the hole 7.1 of the first bearing outer ring 7 , hooked. The ribbon 6 wraps around the rear, invisible outer surface of the bearing outer ring 7 , to the point where the lateral surfaces of the bearing outer rings 5 and 7 have the smallest distance, the point X, and dissolves there from the outer surface of the bearing outer ring 7 from and lies against the outer surface of the bearing outer ring 5 at. The metal band 6 wraps around the bearing outer ring 5 by almost 360 °, is at the point X of the lateral surface of the bearing outer ring 5 lifted again and to the outer surface of the bearing outer ring 7 introduced. The ribbon 6 continues to wrap around a part of the outer surface of the bearing outer ring 7 , and will be at its second end 6.2 by means of a bolt 6.4 in a slot 7.2 of the bearing outer ring 7 hooked. Connected to the second end 6.2 of the band 6 is also a cam 9 , With the bearing outer ring 7 firmly connected is a cam 8th , Further indicated in 1a the position of a plastic spring 11 which part of an in 2 illustrated cuff 10 is.

1a represents the device 100 for clamping two waves 1 . 2 during assembly. The next step would be the cuff 10 as they are in 2 is shown on the bearing outer ring 7 be deferred. The result of this step is in 2 shown. In the 2 and 3 were the knife shafts 1 and 2 no longer shown for a better overview.

2 illustrates how the already in 1a illustrated plastic spring 11 in the cuff 10 is included. Next will be from the 2 and 3a and 3b visible as the recesses 10.1 and 10.2 the cuff 10 the cams 8th and 9 take up. cam 8th is located in the recess 10.1 and cams 9 is located in the recess 10.2 , Out 3a goes the position of the clamping force adjustment screw 12 in the cuff 10 out. In 3b is outlined the working principle of the setting. The rotational movement of the clamping force adjustment screw 12 causes the cuff 10 from the bearing outer ring 7 attached cam 8th is pushed away to the left. As the plastic spring 11 also in the cuff 10 is added, the Kunstofffeder 11 along with the cuff 10 moved to the left. The plastic spring 11 thus acts against the cam 9 , which on the metal band 6 is attached.

Has a folding machine a pair of knife shafts 1 . 2 with a device 100 for clamping the two waves 1 . 2 and acts in the processing of signatures a force on the knife shafts, which would like to cause a bending of the knife shafts, so the deflection of the knife shafts through the device 100 prevented. Due to the force acting both knife shafts 1 and 2 moved apart. The first end 6.1 of the band 6 is over the bolt 6.3 firmly with the bearing outer ring 7 connected and is immovable. The frictional force between the metal band 6 and the warehouse outside ring 5 is much larger than the frictional force of the segmental Mantelumschlingung the second band end because of the large wrap of approximately 360 ° 6.2 around the first bearing outer ring 7 , According to the equation of Eytelwein, this leaves the second bearing outer ring 5 through the band 6 entwined and there is no relative movement between band 6 and bearing outer ring 5 , The second end 6.2 of the band 6 will be in a slot 7.2 the bearing outer ring movably guided. On this second end 6.2 of the band becomes the force, which is a bending of the knife shafts 1 and 2 want to effect, transmit and the cam 9 gets off the line 6 against the plastic spring 11 drawn. According to the dimensioning of the plastic spring 11 a counterforce becomes effective. After the fold sheet through the tools of the knife shaft pair 1 . 2 was processed, and no bending force on the knife shafts 1 . 2 acts, causes the elastic plastic spring 11 a reset of the cam 9 ,

4 shows an alternative embodiment of a device 100 for clamping two waves 1 . 2 , For better clarity, the waves 1 . 2 in 4 not shown. On a particular wave 1 . 2 each becomes a clamping ring 3 pushed with bearing inner ring. By means of a clamping screw 4 can the clamping ring on the shaft 1 respectively. 2 be fixed. On a respective bearing inner ring is a bearing outer ring 5 respectively. 7 postponed. Between bearing inner ring 3 and bearing outer ring 5 respectively. 7 there is a warehouse, which is not visible. On the bearing outer ring 5 respectively. 7 each becomes a cuff 10 postponed. The upper cuff 10 has two through holes. The lower sleeve has two threaded holes. Through the through holes in the upper cuff 10 each one screw 21 stuck through and in the threaded holes of the lower sleeve 10 bolted, with a respective screw 21 with a plastic bushing 20 is underlaid. The plastic bushing 20 acts as a spring element. Depending on the number of screw turns of the screws 21 become the waves 1 and 2 (not shown) braced against each other.

1

cutterhead

2

cutterhead

3

clamping ring with bearing inner ring

4

clamping screw

5

Bearing outer ring

6

metal band

6.1

first The End

6.2

second End of the band

6.3

bolt

6.4

bolt

7

Bearing outer ring

7.1

drilling

7.2

Long hole

8th

cam

9

cam

10

cuff

10.1

recess

10.2

recess

11

Plastic spring

12

Spannkrafteinstellschraube

20

Plastic bushing

21

screw

100

Facility for clamping two waves

X

Position of the smallest distance of the lateral surfaces of 5 and 7

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 1475334 A1 [0002]

Claims (20)

Facility ( 100 ) for clamping two mutually parallel rotating shafts ( 1 . 2 ) in a substrate-processing machine, the shafts ( 1 . 2 ) each carry at least one machining tool, with two bearing inner rings ( 3 ), each with a bearing inner ring ( 3 ) to a respective wave ( 1 . 2 ) and attachable to this, with two bearing outer rings ( 5 . 7 ), each with a bearing outer ring ( 5 . 7 ) on the bearing inner ring ( 3 ) is pushed, and between bearing inner ring ( 3 ) and bearing outer ring ( 5 . 7 ) a bearing is located, and with an element ( 6 . 21 ), which both bearing outer rings ( 5 . 7 ) braced against each other. Device for bracing according to claim 1, characterized in that the element for bracing a band ( 6 ), which around both bearing outer rings ( 5 . 7 ) and at its two ends ( 6.1 ; 6.2 ) on one of the bearing outer rings ( 7 ) is attachable Device for bracing according to claim 2, characterized in that the band ( 6 ) at its first end ( 6.1 ) by means of a first bolt ( 6.3 ) fixed to the bearing outer ring ( 7 ) is connectable and that the tape ( 6 ) at its second end ( 6.2 ) by means of a second bolt ( 6.4 ) in a slot ( 7.2 ) of the bearing outer ring ( 7 ) and that the facility ( 100 ) for clamping a spring mechanism ( 10 . 11 ), which of the movement of the second end ( 6.2 ) of the band ( 6 ) counteracts. Device for bracing according to claim 3, characterized in that the band ( 6 ) at its first end ( 6.1 ) firmly with the first bolt ( 6.3 ) and the bolt ( 6.3 ) into a hole ( 7.1 ) of the bearing outer ring ( 7 ) and that the tape ( 6 ) at its second end ( 6.2 ) firmly with the second bolt ( 6.4 ) and the bolt ( 6.4 ) in the slot ( 7.2 ) of the bearing outer ring ( 7 ) can be suspended. Device for bracing according to claim 3 or 4, characterized in that the spring mechanism ( 11 ) Part of one on the bearing outer ring ( 7 ) push-on cuff ( 10 ). Device for bracing according to claim 5, characterized in that the spring mechanism ( 11 ) has a plastic spring. Device for bracing according to one of claims 2 to 6, characterized in that the band ( 6 ) the bearing outer rings ( 5 . 7 ) in the form of a 8th wraps. Device for bracing according to one of claims 2 to 6, characterized in that the band ( 6 ) the bearing outer rings ( 5 . 7 ) wraps around in the shape of an oval. Device for bracing according to one of Claims 2 to 6, characterized in that the strap ( 6 ) is a metal band. Facility ( 100 ) for clamping according to claim 1, characterized in that the device ( 100 ) two cuffs ( 10 ), which in each case on a bearing outer ring ( 5 . 7 ) are pushed and which by screws ( 21 ) are connectable to each other. Device for bracing according to claim 10, characterized in that the one cuff ( 10 ) Holes for inserting the screws ( 21 ) and the second cuff ( 10 ) Threaded holes for screwing in the screws ( 21 ), wherein the screw heads each with a resilient element ( 20 ). Device for bracing according to one of claims 10 or 11, characterized in that a respective bearing outer ring ( 5 . 7 ) is executed in several parts. Device for bracing according to one of the claims 1 to 12, characterized in that it is in the camp order a needle bearing is. Device for bracing according to one of claims 1 to 13, characterized in that a respective bearing inner ring ( 3 ) by means of a releasable locking element ( 4 ) on the respective wave ( 1 . 2 ) is attachable. Device for bracing according to one of the claims 1 to 14, characterized in that it is in the machining tool is a creasing, perforating or cutting knife. Device for bracing according to one of the claims 1 to 14, characterized in that it is in the machining tool is a roller for pressing the printing material. Device for bracing according to one of the claims 1 to 16, characterized in that it is in the printing material processing machine is a folding machine. Knife shaft pair ( 1 . 2 ) with a facility ( 100 ) for clamping according to one of claims 1 to 14. Folding machine with a pair of knife shafts ( 1 . 2 ) according to claim 18. Method for clamping two shafts parallel to one another ( 1 . 2 ) of a printing material processing machine with a device ( 100 ) for bracing according to claim 1, 2, 3 and 5, comprising the following steps: a) pushing tools and / or tool carriers onto the shafts ( 1 . 2 ) b) sliding on at least one bearing inner ring ( 3 ) to a respective wave ( 1 . 2 ) c) sliding on each bearing outer ring ( 5 . 7 ) on a respective bearing inner ring ( 3 ) d) Spend the waves ( 1 . 2 ) in their working position e) Positioning of bearing rings ( 3 . 5 . 7 ) and tools and / or tool carriers relative to each other f) locking of bearing inner rings ( 3 ) and tools and / or tool carriers on the shafts ( 1 . 2 ) g) mounting the first bolt ( 6.3 ) of the band ( 6 ) into the hole ( 7.1 ), Wrapping the bearing outer rings ( 7 . 5 ) with the band ( 6 ) and hanging the second bolt ( 6.4 ) of the band ( 6 ) in the slot ( 7.2 ) h) pushing on the cuff ( 10 ) i) adjusting the spring mechanism ( 11 )