DE102009046133A1 - Method for conveying sheet stacks in paper processing industry, involves supplying sheet pile on moving conveyor belt, where conveyor section of conveyor belt is exposed to air from bottom - Google Patents

Abstract

The method involves supplying a sheet stack (12) on a moving conveyor belt (22), where a conveyor section of the conveyor belt is exposed to air from the bottom, so that air through the conveyor belt passes through it. A motion manipulator (50) is provided with a linear motion component. An independent claim is also included for a device for conveying sheet stacks in the paper processing industry.

Description

The invention relates to a method for conveying sheet stacks of the paper-processing industry and to a device for conveying sheet stacks of the paper-processing industry with a support table for the sheet stacks to be conveyed.

In the context of the invention, the term "stack of sheets" is understood to mean accumulations of overlapping sheets or individual sheets of paper, foil, plastic or the like, which have a flat shape. In particular, a stack of sheets in the paper-processing industry is understood as a so-called "ream".

A device of the type mentioned is used in the paper processing industry wherever layers or stacks are to be transferred with a certain orientation, for example, from a processing or collection station to a downstream processing station, at the for the corresponding processing a different orientation of the layers or stack is appropriate. Thus, for example, it may be necessary for unpacked stacks of sheets to be glued to the production of blocks, running longitudinally or transversely to the conveying direction while maintaining this conveying direction, the edge to be glued with respect to the respective arrangement of the processing means by a predetermined angle, preferably 90 °, d. H. transverse or longitudinal to the conveying direction, rotated to orient.

In the prior art according to DE 31 25 895 A1 (equivalent to GB 2 080 771 A or US 4,387,890 A ) A device of the type mentioned is described, which has a table for receiving the stack of sheets and a stationarily arranged above rotatably mounted punch. The stack of sheets is held in a floating position by an air cushion generated between the support surface of the table and the underside of the sheet stack, while the stack of sheets is acted upon by the punch on its upper side and rotated about a vertical axis of rotation. The amount of sheet stack to be conveyed by this known device is limited, which has a corresponding effect on the production output of the entire system.

Out DE 37 02 925 A1 and DE 37 18 206 A1 In each case, a conveying device for rotating sheet stacks moving along a turning path is known. The conveying device has a turning conveyor, which consists of two webs arranged side by side, with different speeds drivable, circulating conveyor belts. Due to the different rotational speeds of the two conveyor belts running side by side, the stacks of sheets are subjected to a rotation during their movement in the first direction. In this known device, the rotation of the sheet stack takes place during its movement from the feed conveyor to the discharge conveyor, whereby the throughput of the sheet stack can be increased. In these known devices frictional forces act on the bottom layer, with the additional risk that the upper layers of the stack of sheets can move relative to the lower layer.

Furthermore, it is off DE 10 2004 054 490 A1 discloses an apparatus for changing the orientation of sheet stacks of the paper processing industry, wherein a rotatably mounted engagement means is movably arranged between a feed conveyor and a sheet stack discharge conveyor, being rotated in a turnaround region between the feed conveyor and the discharge conveyor in its orientation.

Based on this prior art, the object of the invention is to handle in a simple and gentle manner to promote sheet stack, it should be possible to obtain the shape of the stack and the design effort should be kept as low as possible.

This object is achieved by a method for conveying sheet stacks of the paper-processing industry, wherein a sheet stack on a moving conveyor belt, preferably linear, is conveyed, wherein in a conveyor section, the conveyor belt is acted upon from below with air, so that air passes through the conveyor belt and by means of the air flowed through the conveyor belt, the static friction between the conveyor belt and the sheet stack is reduced, and wherein in the conveying section of the conveyed on the conveyor belt, scattered, stack of sheets by means of a arranged above the conveyor belt movement manipulator in addition to a linear movement component or to the (Linear) conveying movement is acted upon by the uninterrupted moving conveyor belt with a further movement component, so that in the region of the conveying section, the position and / or the position and / or orientation of the sheet stack on the Transportb and changed.

The invention is based on the idea that isolated from a feeder sheet stacks are delivered to a transfer conveyor or a transfer device, wherein the transfer conveyor has a support table or an air table, wherein above the air table, a continuously conveying conveyor belt or conveyor cloth is arranged as a conveyor belt or transport medium , By means of or on which the sheet stacks or giant are transported through the transfer conveyor.

As a result of the continuous movement of the conveyor belt in the form of a conveying cloth, the sheet stack is conveyed to a discharge conveyor, the air table impinging the air-permeable conveyor belt with air from the underside in a conveyor section, the air passing through the conveyor belt or conveyor cloth, preferably over the entire width , passes through. The width of the conveyor belt or conveyor cloth is greater than the geometric dimensions of the sheet stack, so that it is possible that the moving conveyor cloth in its width corresponds substantially to the width of the air table.

By the blowing air in the region of the conveying section on the air table or support table, the friction or static friction between the funded sheet stack on the conveyor belt or conveyor cloth and the top or surface of the conveyor belt is reduced, so that the sheet stack during and after the movement phases with the motion manipulator not fanned out and remains dimensionally stable.

According to the invention, a motion manipulator for the sheet stack conveyed on the conveyor cloth is furthermore arranged above the conveyor belt or conveyor cloth, the movement manipulator being in engagement with the stack of sheets at least in the region of the conveyor section in which the conveyor belt is or is subjected to blowing air from below.

By performing a predetermined movement of the movement manipulator for the sheet stack, a superimposed movement to the (linear) conveying movement of the sheet stack by the moving conveyor belt is performed without the sheet stack fanning out during the superimposed or additional movement of the movement manipulator, so that, preferably cuboidal , Leaf pile maintains its shape. Overall, after releasing the engagement of the motion manipulator with the staggered by the motion manipulator on the moving conveyor belt or manipulated sheet stack is given dimensionally stable to the subsequent discharge conveyor.

By means of the movement manipulator, it is possible to change the sporadically conveyed sheet stack with continuous conveyance of the conveyor belt in its position or orientation or position, whereby the sheet stack is conveyed linearly by means of the conveyor belt from the input side feed conveyor to the output side discharge conveyor and at the same time by means of the motion manipulator an additional superimposed movement of the sheet stack is executed. In this case, it is possible to provide the sheet stack with the synchronous movement of the movement manipulator and the transport belt with an additional movement, preferably transversely to the linear conveyance.

The advantage of the invention is that during the continuous conveyance of the sheet stack from the input side to the exit side of the transfer conveyor, the linear relative speed, apart from slight changes in speed, between the sheet stack and the conveyor belt is 0 m / s or approximately 0 m / s.

In addition, the relative speed between the conveyor belt and / or the sheet stack to be manipulated is also (approximately) 0 m / s, at least in the region of the conveying section in which the conveyor belt is flowed through from the underside by the blown air from the air table Engagement phase of the movement manipulator with the sheet stack, the conveyor belt and the motion manipulator in the linear conveying movement between the feed conveyor and the discharge conveyor are at least partially synchronous. Here, the linear velocity of the motion manipulator corresponds to the conveyor belt speed. In addition, during the uniform feeding of the sheet stack from the input side to the exit side of the transfer conveyor, further movement is performed transversely to the linear conveying direction by means of the movement manipulator when the movement manipulator is engaged with the stack of sheets.

Moreover, it is possible in one embodiment that by means of the movement manipulator, the sheet stack is accelerated or decelerated in the linear conveying direction from the input side to the output side by means of the motion manipulator to the conveyed and manipulated by the motion manipulator sheet stack in a predetermined manner or a predetermined clock to hand over the subsequent removal conveyor.

Characterized in that in a conveyor section of the support table or the air table of the transfer conveyor is equipped with blown air and is achieved during the promotion of each sheet stack on the conveyor belt arranged above and driven that the blown air passes through the fabric of the conveyor belt and thereby of the Bottom of the stack of sheets is raised, whereby the friction or static friction between the sheet stack and the conveyor belt is lowered.

In particular, the transport belt used as air-permeable conveyor cloth, z. B. Siebtuch or the like. Preferably, the conveyor cloth has an air-permeable fabric, wherein in one embodiment, the conveyor cloth is made of textile fibers. In particular, textile fibers made of plastic are used for the production of the conveying cloth. The use of such conveyor belts in combination with an air table for the promotion of sheet stacks or stacks of paper or the like in the paper processing industry lead to a secure transport of the sheet stack while maintaining the shape of the sheet stack. Advantageously, the conveyor belt is designed as a spiral screen or woven dryer fabrics or laminate felt for this purpose.

If in the present context of a conveyor belt is mentioned, is in the context of the invention thus includes a conveyor cloth or sieve cloth with.

By reducing the friction between the stack of sheets and the conveyor belt, it is possible to move the sheet pile gently by the engagement or by the use of a motion manipulator in its relative position on the conveyor belt or to rotate or move, due to the reduced friction between the stack of sheets and the conveyor belt of the sheet stack is maintained in its shape, whereby shifts within the sheet pile are avoided. This makes it possible to rotate the stack of sheets during conveying on the conveyor belt without external frictional forces occurring during the rotation, which could lead to a deformation of the sheet stack. In addition, owing to the continuous process, eleven high throughputs of sheet stacks to be rotated or shifted are achieved, thereby achieving high overall production performance.

Without intervention of the movement manipulator, a stack of sheets, which is acted upon in a conveyor section from below with blown air through the conveyor belt, whereby the friction between the sheet stack and the conveyor belt is reduced, also transported across the air table or support table, since the blown air Stiction is not completely repealed or is.

Moreover, it is possible for the transfer conveyor to be used in a small format (paper) cutting machine of the paper converting industry, in one embodiment the transfer conveyor being used as a unpacked giant turning station for feeding the stock in the right direction to a packaging machine.

According to the invention, an air-permeable belt or cloth is used as a transport means above the supporting table or the air table, which is blown through from below over the air table over its, in particular entire, width. As a result, the friction between the conveyor belt and the sheet pile or ream is reduced so that the sheet stack can be easily and easily moved and manipulated on the conveyor belt. In this case, the lower arc or the lower sheets of the sheet stack is subjected to little load during manipulation due to the lower friction in the assisted with blowing air or acted conveyor section, with no damage to the manipulated sheet stack and this remains dimensionally stable. Due to the reduced friction between the sheet stack and the continuously conveyed conveyor belt, the sheet pile does not fan out.

Moreover, it is possible according to the invention that during the manipulation in the conveyor section, in the conveyor belt from below with blowing air is applied or is accelerated, translationally and / or rotationally accelerated, wherein during this manipulation phase of the sheet stack in the fixed engagement to form a mechanical positive connection with the gripping means of the motion manipulator. Moreover, it is possible within the scope of the invention for the transfer conveyor to be designed both as a (reaming) rotating station or as a discharge station or else as an assembly device or (splitter) divider or the like.

In addition, the method is characterized in one embodiment in that by means of the movement manipulator, the sheet stack, preferably by a predetermined angle, rotated and / or translational, in particular linear, is moved or moved on the conveyor belt. For example, a device for changing the orientation of sheet stacks is provided with a rotation of 90 °, wherein by means of the movement manipulator, a rotating device is formed, for example, has a rotatably mounted engagement means for a rotationally fixed engagement with the sheet stack to be rotated. Here, the sheet stack is rotated in a turning area between a feed conveyor and a discharge conveyor on the transfer device in a turning area, for example by 90 ° about a, preferably vertical, axis of rotation or pivot axis of the motion manipulator.

Moreover, it is possible to form the transfer device according to the invention as a distribution station or distribution device, if from a zuzuförderten mass flow of sheet stacks by an additional linear motion control by means of the motion manipulator at least two partial streams on the output side of the transfer device are formed by, for example by means of the movement manipulator each second sheet stacks of the delivered mass flow using the Movement manipulator is moved on the conveyor belt, preferably transversely to the linear conveying direction, between the input side and the output side.

Moreover, it is also provided in the context of the invention, by means of the motion manipulator, preferably simultaneously, to perform a rotation of the sheet stack and an additional translational movement of the sheet stack on the conveyor belt with the sheet stack, so that the output side conveyed sheet stack on the conveyor belt with a certain lateral offset with respect to, for example, to the outer edge of the conveyor belt or with respect to the feed conveyor arranged or placed.

Furthermore, an embodiment of the method is characterized in that by means of at least one, preferably input side, sensor the position or orientation of a funded sheet stack is detected prior to detection by or engagement with the motion manipulator and depending on the detected position or orientation of the sheet stack the movement manipulator is positioned and / or moved in relation to the sheet pile conveyed on the conveyor belt, thereby aligning the movement manipulator with the conveyed sheet stack and after aligning the movement manipulator to form and maintain a conveying speed at the same conveying speed as the sheet stack to be picked is moved, so that the gripping means of the movement manipulator are brought into engagement with the sheet stack or object to be detected. In this case, when detecting the sheet stack, the movement manipulator and the sheet stack are moved synchronously with each other.

In particular, prior to contact with the sheet stack on the conveyor belt during uninterrupted conveyance of the sheet stack, the movement manipulator is moved with the sheet stack to be detected, preferably in parallel, and gripping means of the movement manipulator are subsequently brought into contact with the sheet stack.

In addition, in one embodiment it is preferred that a sheet stack detected by the movement manipulator is aligned on the conveyor belt, preferably before it is delivered to a subsequent discharge conveyor. This makes it possible, for example, that a sheet stack is further processed at the subsequent devices, not completely rotated by 90 ° by means of the motion manipulator, but is set due to the further processing of the predetermined rotation angle with an offset of a few degrees.

Moreover, it is provided in a further embodiment of the method that the movement manipulator between a start position and an end position above the conveyor belt, preferably linear, is moved back and forth. Here, for example, the motion manipulator is linearly movable by means of a linear motor along a straight rail between the input side and the output side of the conveyor, wherein the movement manipulator for performing a rotation or rotation is transverse, in particular perpendicular, for linear movement, rotatably mounted to the sheet stack in the turning area the conveyor section, in which the moving conveyor belt is traversed from below with air to rotate with a rotary motion. For the Drehwegung about a vertical axis is also a separate drive, preferably a servo drive such as a servo motor or the like, is provided.

In addition, the object is achieved by a device for conveying stacks of sheets of paper processing industry with a support table or air table for the sheet stack to be funded, which is further characterized in that above the support table a drivable or driven conveyor belt is provided, wherein the conveyor belt in the area a conveyor section of the support table is traversed from below by means of air from an air source or is or is flowed through and provided in the conveying section above the conveyor belt, a movable motion manipulator for arranged on the conveyor sheet stack, so that using the motion manipulator while maintaining the promotion of isolated Sheet stack on the conveyor belt, the position and / or the position of the sheet stacks are each variable on the conveyor belt.

This makes it possible to move the separated sheets stack on the continuously moving conveyor belt after transfer from a feed conveyor on the support table with the arranged above and moving conveyor belt in position or orientation on the conveyor belt according to the sheet stack each individually and be moved independently of each other by means of the driven motion manipulator in engagement therewith.

The inventive device for conveying stacks of sheets of the paper-processing industry is also referred to as a transfer conveyor, which is preferably arranged between at least one feed conveyor and at least one discharge conveyor. A transfer conveyor is formed for example by a turning station.

In particular, in one embodiment, a feed conveyor and a discharge conveyor in the conveying direction of the sheet stack are arranged in alignment with each other. Likewise, it is possible in a development that the Feed conveyor and the discharge conveyor in the conveying direction of the sheet stack with a lateral offset from each other, that is not aligned.

In the context of the invention, it is possible that a plurality of stacks of sheets are moved on the conveyor belt by means of a motion manipulator. Moreover, it is also possible that a plurality, in particular independently movable or driven, movement manipulators are provided for each one sheet stack, so that a plurality of sheet stacks are moved simultaneously on the conveyor belt. As a result, the throughput rate is significantly increased at, for example, to be rotated sheet stacks at a turning station, wherein a plurality of sheet stacks are transported simultaneously between the input side and the output side of the support table or the air table with the conveyor belt continuously.

In addition, it is provided in a further embodiment of the device that detection means or at least one sensor for detecting the position and / or orientation of, in particular sporadically conveyed, sheet stacks, preferably on the input side of the support table, provided or is, in particular the detection means with interact with a position transmitter of the conveyor belt. For example, the position of the sheet stacks to be manipulated is detected using two input-side sensors. At the same time, using the sensors or detection means, it is possible to determine the center points of the sheet stacks in a simple manner by specifying the formats to be processed, so that correspondingly the movement manipulator is delivered to the sheet stack on the conveyor belt or correspondingly to the linear conveying movement of the sheet stack the conveyor belt between the input side and the output side is synchronously moved or synchronized.

In addition, it is advantageously provided that a control and / or regulating device is provided for the movement manipulator, so that the movement (s) of the movement manipulator to be executed, preferably in dependence on the position and / or orientation of the fed or discharged sheet stack, executable or are or will be or will be.

Furthermore, an advantageous embodiment of the device is characterized in that the conveyor belt is designed as a sieve and / or as, preferably woven, dryer fabric or as a spiral wire and / or formed as a (closed) band and / or that, preferably controllable, drive is provided for the conveyor belt.

Moreover, it is favorable according to a development of the device, when the motion manipulator has a rotary head carriage, wherein the rotary head carriage is movably mounted on a linear guide rail, wherein in particular one, preferably position-controlled, servomotor for the, preferably linear, movement of the rotary head carriage along the linear guide rail is provided and / or wherein the linear guide rail, preferably on both sides, transversely, in particular vertically, is mounted to the longitudinal guide rail movable on at least one carrier, being provided for the transverse movement of the linear guide rail, preferably position-controlled, drive, preferably servo drive.

Furthermore, it is preferred that the movement manipulator has a rotary head carriage, wherein the rotary head carriage has a rotary drive, wherein in particular the rotary drive of the rotary head carriage is designed as a, preferably position-controlled, servomotor.

In addition, the movement manipulator has at least two or more gripping means for, preferably laterally, fixing of the sheet stack, wherein in particular the gripping means are designed as fingers. Preferably, the movement manipulator has an even number of movable, in particular pivotable, fingers, wherein the fingers of each pair of fingers, in particular at a distance of the width or length of a sheet stack to be gripped, are spaced from each other and cooperate with each other when fixing the sheet stack. In a preferred embodiment, four pivotable fingers are arranged on the rotary head carriage.

Preferably, a control and / or control device for the conveyor belt is provided.

Moreover, a further aspect of the invention is a use of a conveyor belt in a device for conveying sheet stacks of the paper processing industry or in a transfer conveyor, as described above, wherein the conveyor belt is designed to be permeable to air. To avoid repetition, reference is expressly made to the above statements.

Further features of the invention will become apparent from the description of embodiments according to the invention together with the claims and the accompanying drawings. Embodiments of the invention may satisfy individual features or a combination of several features.

The invention will be described below without limiting the general inventive idea by means of embodiments with reference to the drawings, reference being expressly made to the drawings with respect to all in the text unspecified details of the invention. Show it:

1 schematically an embodiment of a device according to the invention in a side view;

2 schematically a detailed view of a movable gripper in an end position,

3 schematically a cross-sectional view of the in 2 shown gripper;

4a . 4b . 4c schematically each different applications of different conveyor devices according to the invention.

In the following figures, identical or similar elements or corresponding parts are provided with the same reference numerals, so that a corresponding renewed idea is dispensed with.

1 schematically shows a side view of the basic structure of a transfer conveyor 20 or a device for transferring, preferably unpacked, sheet stacks in the form of giants 12 between a schematically designated feed conveyor 10 and a discharge conveyor shown schematically 90 ,

The feeder 10 transported giant 12 the transfer conveyor 20 to, being the feed conveyor 10 for example, several separate conveyor belts 14 has, which are arranged parallel to each other at a predetermined distance from each other.

The feeder 10 one by one the giant advances the transfer conveyor one at a time 20 to. This can be done on the feeder 10 a separation of the successively promoted giant 12 occur. In one embodiment, it is conceivable that the feed conveyor 10 already the giant 12 sporadically passed, so that the isolated giant to the transfer conveyor 20 be transported further.

By means of the output side or discharge side of the transfer conveyor 20 provided for removal 90 become the giant 12 occasionally further transported for further processing. Here, the discharge conveyor has 90 over several juxtaposed as well as driven, parallel conveyor belts 94 ,

The transfer conveyor 20 is a kind of intermediate conveyor, such. B. a so-called turning station, and has a conveyor cloth 22 as a conveyor belt, with the conveyor cloth 22 between an input side pulley 24 and an output side pulley 26 is conveyed horizontally or linearly. The conveyor cloth 22 is at the bottom over another pulley 27 and via a means of a tensioning device 28 acted upon or biased pulley 29 promoted, so that subsequently the conveyor cloth 22 a drive roller 30 wraps around with a high degree of wrap.

This is the drive roller 30 via a drive wheel 31 and one with the drive wheel 31 engaged drive belt 32 and one with the drive belt 32 engaged engine 33 driven, causing the conveyor cloth 22 without interruption is uniformly moved or driven with a constant conveyor cloth conveying speed.

Between the pulleys 27 and 28 are in the range of the empty strand of the conveying cloth 22 sensors 34 . 35 and 36 arranged to the tension or position of the conveyor cloth 22 capture. For example, the sensors 34 . 35 and 36 as photocells, light sensors, light barriers, ultrasonic sensors or the like, so that z. B. by means of the sensors 34 . 36 the location of the outer edges of the conveyor cloth 22 is detected while using the sensor 35 the middle part of the cover is recorded. For example, by means of the sensors 34 . 36 detects that the conveyor cloth too far on one side, ie has run out of the predetermined range, by means of a (not shown here) control device the conveyor cloth 22 moved back to the specified range. In addition, it is possible for a stop message and / or a safety warning to be output or displayed.

In addition, for example, by means of the sensor 35 the tension in the conveyor cloth 22 be detected, so that depending on the detected voltage, for example, the clamping device 28 For example, in the form of a clamping cylinder is regulated to a corresponding voltage in the conveyor cloth 22 to maintain. Due to the set tension or pretension of the conveyor cloth 22 is it possible that the conveyor cloth 22 is kept in a preferred middle position during its continuous or uninterrupted promotion in operation, so that the conveyor cloth 22 do not run too far to one side.

The conveyor cloth 22 is upper side between the pulleys 24 and 26 via a trained as a support table air table 40 horizontally carried away, the air table 40 can be divided into several (air) chambers. At the air table 40 is connected to a (compressed air) source (not shown here).

Here is the air table 40 via openings at the top, wherein in one embodiment the openings may have ball valves. By a (compressed) air supply from a compressed air source, not shown here, in the cavities or in the cavity or the air chambers in the air table, an air pressure can be established, which via corresponding top openings in the air table 40 from below against the underside of the arranged above it and continuously moving conveyor cloth 22 suppressed.

In one embodiment, the air table 40 divided into several individual air chambers. The air chamber or chambers of the air table are provided to the outside with channels or openings, either permanently open or with valves, eg. B. ball valves, are closed.

By doing that, the conveyor cloth 22 is permeable to air, flows through the air table 40 leaking air in a conveyor section vertically upwards the conveyor cloth 22 , which makes that on the conveyor cloth 22 arranged ream 12 is raised in this conveyor section such that the friction between the conveyor cloth 22 and the ream 12 is lowered.

If an isolated ream 12 by means of the feeder 10 to the input side of the transfer conveyor 20 is conveyed on the input side of the transfer conveyor 20 by means of at least one sensor provided on the input side 42 the leading edge of the sheet pile or the ream 12 recognized. Preferably, there are two spaced sensors 42 transverse to the conveying direction 65 provided that easily recognize a possibly twisted conveyed Ries. Due to the specification of the format of the Ries to be processed 12 be by means of a control and regulating device 61 the (changing) positions of the moving giant 12 that in the transfer conveyor 20 transported, determined.

In addition, by means of the control and regulating device 61 the virtual center of the Ries 12 that in the transfer conveyor 20 was entered, so that on the basis of one above the conveyor cloth 22 arranged and movable motion manipulator 50 with a turret carriage 51 on the virtual center of the Ries 12 is positioned and the speed of the rotary head carriage 51 is synchronized accordingly. The turret carriage 51 is along a arranged between the input side and the output side linear guide rail 58 as longitudinal guide between the input side and the output side linearly movable or movable, wherein the rotary head carriage 51 on the underside via, preferably pneumatic, folding or over, preferably pneumatic, swivelable and / or movable fingers 54 . 56 on each side of the ream 12 has, taking the fingers 54 . 56 before the capture of a ream in the transfer conveyor 20 are in the extended state.

For example, are the fingers 54 . 56 pivotable about a pivot axis, are advantageously the pivot axes of the open fingers 54 . 56 Preferably arranged or aligned parallel to the paper direction or in the extended state by a corresponding motion guide, whereby fingers 54 . 56 laterally on the long sides (in the conveying direction) of the giant 12 be created. It is provided in one embodiment that the fingers are also designed to be horizontally movable, in particular to hold and promote different leaf or Riesformate.

It is provided in one embodiment, due to the pivotability of the rotary head carriage 51 the pivot axes transverse to the longitudinal sides of the conveyor cloth 22 to arrange, if at the entrance of the giant 12 in the transfer conveyor 20 by means of one or more sensors 42 it is stated that the giant 12 with their long sides not parallel, ie that the face of the giant 12 not perpendicular to the outer edges of the Fuchsuchs 22 is, but transversely or obliquely on the conveyor cloth 22 lie or from the feed conveyor 10 have been promoted.

To an incoming ream 12 by means of the movement manipulator 50 to capture, the rotary head carriage 51 placed in a waiting position, wherein in the waiting position, the fingers 54 . 56 are open.

To an incoming ream 12 to capture, the rotary head carriage 51 positioned on the virtual center or the virtual pivot axis of the ream and according to the conveying speed on the conveyor cloth 22 synchronized. It will be during the synchronization of the rotary head carriage 51 with open fingers 54 . 56 and the Ries 12 on the conveyor cloth 22 the fingers open on both sides 54 . 56 brought by a preferably pneumatic actuation or activation in the vertical position and closed, whereby the ream 12 between the closed fingers 54 and 56 is held on both sides to form a positive connection.

During this transport of the Ries 12 on the conveyor cloth 22 without interruption of production of the conveyor cloth 22 becomes the ream 12 over the air table 40 moved away, which means by means of the conveyor table 40 escaping air and by the draper 22 passing air the stiction of the Ries 12 on the conveyor cloth is lowered.

After the fingers 54 . 56 on the rotary head carriage 51 are pivoted, begins in the acted upon with blown air conveyor section of the rotation of the between the fingers 54 . 56 held Rieses 12 , In this case, the turning operation about the vertical pivot axis 60 of the rotary head carriage 51 executed, so that, for example, the ream 12 rotated by 90 ° and the ream formed as a stack of sheets is rotated by 90 °, whereby the orientation of the sheet stack 12 will be changed. It is possible that in the present embodiment, the transfer conveyor 20 is designed as a turning conveyor.

During the turning process or pivoting process, the conveyor cloth 22 or the Ries 12 and the turret carriage 51 in the linear direction at the same conveying speed to the exit side of the transfer conveyor 20 emotional. Here is the relative speed between the conveyor cloth 22 and the turret carriage 51 due to the linear synchrony 0 m / s.

Moreover, in one embodiment, it is possible for the turning process to be speed-dependent via a predetermined conveying path. When the turning process is completed, the fingers become 54 . 56 reopened, with the rotary head carriage 51 in sync with the free ream 12 is moved on the delivery side. Are the fingers 54 . 56 of the rotary head carriage 51 Fully opened, then a braking process can be initiated in the outlet area or on the area of the output side and then in a return stroke of the rotary head carriage 51 be positioned on the input side.

In one embodiment, it is possible that after completion of the turning operation by a predetermined angle, for example 90 ° or the like, the ream on a previously by the control and regulating device 61 calculated or certain target position is spent before the fingers 54 . 56 on the rotary head carriage 51 be opened. This can be the case, for example, if the distances of the conveyed giant 12 vary greatly. In this case, the rotary head carriage moves 51 briefly faster or slower than the conveyor cloth 22 ,

In 2 and 3 are various schematic views of a gripper and a rotary head carriage 51 in a side view (see. 2 ) and in a cross-sectional view (see. 3 ) in the end region on the outlet side of the transfer conveyor 20 shown. In the end of the linear guide rail 58 is a drive 62 for the rotary head carriage 51 arranged so that the turret carriage 51 linear along the linear guide rail 58 can be moved on the underside, wherein the drive 62 a position sensor 38 having.

In addition, the rotary head carriage 51 rotatably mounted and has a (rotary) drive 64 to a corresponding rotation or pivotal movement about the pivot axis 60 perform, with the drive 64 a position sensor 39 having. At the bottom has the rotary head carriage 51 via appropriate fingers 54 . 56 to grasp a conveyed stack of sheets or a requested ream by a mechanical positive connection by lateral application of the fingers to the longitudinal sides, whereby a corresponding gentle treatment and rotation of the ream on the conveyor cloth 22 is possible.

In the context of the invention, it is possible that on the linear guide rail 58 two rotary carriage 51 on the bottom and one behind the other and are operated independently of each other, whereby the throughput rate of manipulated or reoriented giants or the like is increased significantly correspondingly.

In addition, it is by adjusting the distances of, preferably pneumatically actuated, fingers 54 . 56 possible, different formats after a corresponding adjustment to the transfer conveyor 20 to process.

We out 3 in the cross-sectional view, the conveyor cloth 22 over the entire width of the air table 40 continuously conveyed away, reducing the air table 40 almost completely from the conveyor cloth 22 is covered. Only in the edge region, in which no air nozzles or openings are arranged, the air table protrudes 40 over the conveyor cloth 22 on the lower side. By the in 3 marked arrow 65 becomes the linear conveying direction of the sheet stacks 12 or the giant marked. In the present case, the conveying plane runs perpendicular to the plane of the drawing and into the plane of the drawing.

In the 4a to 4c schematically various applications of a transfer conveyor are shown.

According to the in 4a illustrated embodiment, the of the feed conveyor 10 to the conveyor cloth 22 delivered giant 12 during their continuous promotion on the conveyor cloth 22 by means of in the 1 to 3 shown rotary head carriage 51 changed in their orientation by a rotation of 90 °, leaving the twisted giant 12 at the discharge conveyor 90 be carried away with a different orientation. Here is the above the conveyor cloth 22 for clarity here not shown rotary head carriage linear, ie in the linear conveying direction of the giant 12 arranged above the fodder.

At the in 4b illustrated embodiment is the linear guide rail 58 on both sides of transversely to the conveying direction arranged carriers 70 movably movably mounted on linear guide rails, not shown here. This arrangement thus effectively forms a surface gantry robot, the three axes (x, y, c) with two linear axes (x, y) and a rotation axis 60 or (c), wherein in one embodiment, servo motors with integrated position sensors are preferably provided as axle drives. According to a further embodiment, the drives of the linear axes x and y are also designed as linear motors with position sensors.

By means of this arrangement, it is possible to move the predetermined giant laterally, whereby a lateral offset between the giant is achievable, so that after lateral spacing of the giant on the output side, the shifted and discharged giant 12 a discharge belt 95 be promoted. Instead of the discharge belt 95 can also be a discharge conveyor to a further processing machine (see reference numerals 90 ) be provided.

At the in 4c illustrated embodiment, the transfer conveyor is also designed as a three-axis surface gantry robot (not shown here) to those of the feed conveyor 10 and another parallel feeder 16 alternating promoted giant 12 to unite into a common stream. Here, the rotary head carriage runs 51 in the plan view from bottom left to top right, so that the alternating delivered giant 12 over the two feeders 10 and 16 arranged in a kind of zipper process one behind the other, wherein the feed conveyor 16 delivered giant 12 during their promotion on the conveyor belt 22 additionally be moved laterally by means of the movement manipulator in order to be in the gaps between the feed conveyor 10 to insert promoted giant.

All mentioned features, including the drawings alone to be taken as well as individual features that are disclosed in combination with other features are considered alone and in combination as essential to the invention. Embodiments of the invention may be accomplished by individual features or a combination of several features.

LIST OF REFERENCE NUMBERS

10

feeder

12

ream

14

conveyor belt

20

Transfer conveyor

22

draper

24

idler pulley

26

idler pulley

27

idler pulley

28

warning device

29

idler pulley

30

capstan

31

drive wheel

32

drive belts

33

drive motor

34

sensor

35

sensor

36

sensor

37

locator

38

locator

39

locator

40

air table

42

detection means

50

movement manipulator

51

Turret slide

54

finger

56

finger

58

Linear guide rail

60

swivel axis

61

Control and regulating device

62

drive

64

drive

65

Arrow (conveying direction)

66

Arrow (direction of movement ± y)

67

Arrow (direction of movement ± x)

68

Arrow (direction of movement ± c)

70

crossbeam

90

discharge conveyor

94

conveyor belt

95

Ausschleusungsband

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 3125895 A1 [0004]
• GB 2080771 A [0004]
• US 4387890 A [0004]
• DE 3702925 A1 [0005]
• DE 3718206 A1 [0005]
• DE 102004054490 A1 [0006]

Claims (14)

Method for conveying stacks of sheets ( 12 ) of the paper-processing industry, whereby a stack of sheets ( 12 ) on a moving conveyor belt ( 22 ) is conveyed, wherein in a conveyor section the conveyor belt ( 22 ) is subjected to air from below, so that air through the conveyor belt ( 22 ) passes through and by means of the conveyor belt ( 22 ) through the friction between the conveyor belt ( 22 ) and the stack of sheets ( 12 ) is lowered, and wherein in the region of the conveying section of the on the conveyor belt ( 22 ) promoted stacks of sheets ( 12 ) by means of one above the conveyor belt ( 22 ) arranged motion manipulator ( 50 ) is acted upon in addition to a linear movement component with a further movement component, so that in the region of the conveying portion, the position and / or the position of the sheet stack ( 12 ) on the conveyor belt ( 22 ) is changed. Method according to claim 1, characterized in that by means of the movement manipulator ( 50 ) of the sheet stack ( 12 ), preferably by a predetermined angle, rotated and / or translated, in particular linear, is moved. Method according to claim 1 or 2, characterized in that the position of a conveyed sheet stack ( 12 ) and depending on the detected position of the sheet stack ( 12 ) the movement manipulator ( 50 ) in relation to the sheet stack ( 12 ) is positioned and / or moved. Method according to one of claims 1 to 3, characterized in that the movement manipulator ( 50 ) before contact with the sheet stack ( 12 ) while conveying the sheet stack ( 12 ) with the sheet stack to be detected ( 12 ), preferably in parallel, is moved and gripping means ( 54 . 56 ) of the movement manipulator ( 50 ) then in contact with the sheet stack ( 12 ) to be brought. Method according to one of claims 1 to 4, characterized in that one of the movement manipulator ( 50 ) detected sheet stack ( 12 ) on the conveyor belt ( 22 ), preferably before delivery to a subsequent discharge conveyor ( 90 ), is aligned. Method according to one of claims 1 to 5, characterized in that the movement manipulator ( 50 ) between a start position and an end position above the conveyor belt ( 22 ), preferably linear, is moved back and forth. Contraption ( 20 ) for conveying stacks of sheets ( 12 ) of the paper processing industry with a support table ( 40 ) for the sheet stack to be conveyed, characterized in that above the support table ( 40 ) a drivable or driven conveyor belt ( 22 ) is provided, wherein the conveyor belt ( 22 ) in the region of a conveying section of the support table ( 40 ) is flowed through from below by means of air or is or can be flowed through and in the region of the conveying section above the conveyor belt ( 22 ) a motion manipulator ( 50 ) for on the conveyor belt ( 22 ) arranged sheet stacks ( 12 ) is provided so that using the motion manipulator ( 50 ) while maintaining the promotion of the stacks of sheets ( 12 ) on the conveyor belt ( 22 ) the position and / or position of the stacks of sheets ( 12 ) on the conveyor belt ( 22 ) are changeable. Contraption ( 20 ) according to claim 7, characterized in that one or more detection means ( 42 ) for detecting the position and / or orientation of, in particular sporadically funded, sheet stacks ( 12 ), preferably on the input side of the support table ( 40 ), in particular the detection means ( 42 ) with a position sensor ( 37 ) of the conveyor belt ( 22 ) interact. Contraption ( 20 ) according to claim 7 or 8, characterized in that a control and / or regulating device ( 61 ) for the movement manipulator ( 50 ) is provided, so that the movement of the movement manipulator ( 50 ), preferably in dependence on the position and / or orientation of the conveyed and / or requested sheet stacks ( 12 ), is executable or is managed. Contraption ( 20 ) according to one of claims 7 to 9, characterized in that the conveyor belt ( 22 ) as a sieve cloth ( 22 ) and / or as, preferably woven, dryer fabric or as a spiral screen and / or that a, preferably controllable, drive, in particular servo drive, for the conveyor belt ( 22 ) is provided. Contraption ( 20 ) according to one of claims 7 to 10, characterized in that the movement manipulator ( 50 ) a rotary head carriage ( 51 ), wherein the rotary head carriage ( 51 ) on a linear guide rail ( 58 ) is movably mounted, wherein in particular a, preferably position-controlled, servomotor ( 62 ) for the, preferably linear, movement of the rotary head carriage ( 51 ) along the linear guide rail ( 58 ) is provided and / or wherein the linear guide rail ( 58 ), preferably on both sides, transversely, in particular perpendicular, to the longitudinal guide rail on at least one carrier ( 70 ) is mounted, wherein for the transverse movement of the linear guide rail ( 58 ), preferably position-controlled, drive, preferably servo drive, is provided. Contraption ( 20 ) according to one of claims 7 to 11, characterized in that the movement manipulator ( 50 ) a rotary head carriage ( 51 ), wherein the rotary head carriage ( 51 ) a rotary drive ( 64 ), wherein in particular the rotary drive ( 64 ) of the rotary head carriage ( 51 ) as a, preferably position-controlled, servomotor ( 64 ) is trained. Contraption ( 20 ) according to one of claims 7 to 12, characterized in that the movement manipulator ( 50 ) at least two or more gripping means ( 54 . 56 ), preferably laterally, fixing the sheet stack ( 12 ), in particular the gripping means ( 54 . 56 ) are formed as fingers. Contraption ( 20 ) according to one of claims 7 to 13, characterized in that a control and / or control device ( 61 ) for the conveyor belt ( 22 ) are provided.

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