DE102015210560A1 - Display for a sheet-processing machine and method for storing sheets - Google Patents

Abstract

The invention relates to a display for a sheet-processing machine with a sheet conveying system for conveying and releasing sheets (7) on a delivery stack (9), wherein at least one stop (12, 14, 16) for aligning the falling and the delivery stack (9) forming Sheet (7) is provided and wherein at least one sensor (15, 17, 25, 26, 30) is provided for monitoring the sheet deposition and a method for storing sheets. The invention has for its object to provide a display of a sheet-processing machine. In particular, the display is designed so that accidents can be excluded by faulty filed sheets and the effectiveness of the machine is increased. According to the invention, the object is achieved in that an evaluation or control device which evaluates the sensor signal of a respective sheet (7) and which is connected to the sensor (15, 17, 25, 26, 30) and sensor signals of the sensor (15, 17) is provided. with respect to a state parameter of the printing press and / or with respect to a sensor signal of another sheet (7) evaluates.

Description

The invention relates to a display for a sheet-processing machine with a sheet conveying system for conveying sheets on a delivery pile and a method for storing sheets.

In the DE 10 2006 040 679 A1 a method and an apparatus for depositing sheets of a sheet-processing machine are described on a sheet stack, the sheets are transported by the endless circulating sheet conveying system successively on the sheet stack and with the sheet leading edge against leading edge stops. In order to be able to realize an exact stack formation, the sheet stacks are provided with stop surfaces in the upper area in the form of such displays, to which a reciprocating movement directed transversely to the sheet transport direction is impressed, whereby the sheets are aligned with respect to their side edge. The position of the side edges of the arc fed from the sheet conveying system to the sheet stack with respect to the abutment surfaces is detected by also provided laterally ultrasonic sensors. In case of deviations of the actual position of the target position adjusting elements are activated to correct the sheet position or the sheet promotion is interrupted.

The disadvantage is that only in case of deviations of the actual position of the desired position with respect to the side edge position, a correction or interruption of the sheet feed takes place. This means, however, that only so-called oblique bends with respect to the side edge stops and not also overshoot arch or oblique arc with respect to the leading edge stops are detectable. Overshoot arch or oblique arch with respect to the leading edge stops are guided over them by the gripper systems or the sheet brake system which decelerates the sheets and promotes against the leading edge stops. If such sheets are entrained by subsequent gripper systems of the sheet conveying system, this can lead to a breakdown of the sheet-processing machine.

The measure that the sheet feed is interrupted in case of deviations of the position of the side edges of a desired position, reduces the effectiveness of the sheet processing machine in that all sheets are in the machine waste paper. In addition, it is disadvantageous that the sheets located in the machine must be removed time consuming.

From the DE 101 06 669 A1 a device for storing sheets is known, are arranged in the measuring devices in the leading edge stops. In a first embodiment, the measuring device is designed as a touch sensor, which can detect the Bogenankunftshöhe and further the contact intensity. In a second embodiment, the measuring device is designed as a receiver of a light beam emitted by a light source. A connected control and regulating device changes the timing of the gripper opening and / or the speed (peripheral speed) of the suction roller and / or the suction force of the suction roller and / or the blowing intensity of the fan. A disadvantage of this solution is that no crooked or overshoot bow can be detected.

From the DE 198 19 688 A1 a device for protecting the gripper systems is known in which a mechanical Überießbogenkontrolle is provided. The overshoot arch control contains feeler links that are pivoted about a frame point in an overshoot arc. By swiveling the feeler links, the machine receives the signal "Emergency stop". A disadvantage of this solution is that the mechanical scanning of overspill is prone to errors, since the sensing elements cause a safe distance to the gripper carriage track. If an overshoot is not detected, the machine may be damaged at high speeds. Another disadvantage is that no crooked sheets are detected as such.

From the DE 10 2004 021 808 A1 a Überschussbogensicherung in a sheet delivery is known, which has mechanically displaceable by Überießbogen levers. The movement of the levers is sensor-monitored, so that when a detected over-shoot, the sheet-processing machine can be switched off. A disadvantage of this solution is that the mechanical scanning of overspill is prone to errors, since the levers require a safe distance to the gripper carriage track. If an overshoot arc is not detected, the machine may be damaged at high speeds. Another disadvantage is that no obliquity can be detected as such.

From the EP 1 842 817 A2 a device for detecting irregular sheet design is known, wherein the boom has a first and a second sheet stack downstream therefrom. The front edge stops of the first sheet stack is assigned a non-contact sensor that detects an irregular sheet transport and stops the sheet processing machine. This is wasteful, which must be removed from the machine time-consuming, with the individual sensor detects only very far overshoot, while oblique sheets can not be detected as such.

The invention is based on the object, a display of a sheet-processing machine create. In particular, the display is designed so that accidents can be excluded by faulty filed sheets and the effectiveness of the machine is increased.

According to the invention the object is achieved by a device having the features of the independent device claim or by a method having the features of the independent method claim. Advantageous embodiments will become apparent from the dependent claims, the description and the drawings.

In one embodiment, a display (also referred to as a cantilever) is provided for a sheet processing machine having a sheet to a delivery stack and having a sheet leading edge of the sheets on at least two leading edge stops conveying sheet delivery system, wherein the at least two leading edge stops span a leading edge stop plane, wherein at least a further stop for aligning the delivery stack is provided at a further edge of the delivery stack and wherein at least one detection unit is designed to monitor at least one point downstream of the leading edge stop plane in the sheet transport direction. In this case, at least one of the leading edge stop plane is monitored in the sheet transport direction upstream point. At least one sensor is preferably designed to monitor the at least one point. Particularly preferably, the at least one sensor for monitoring the at least one point, in particular the position of at least one arc with respect to the further stop, precedes the front edge stop plane spanned by the leading edge stops in the sheet transport direction. The sensor can be designed as desired and is preferably a non-contact sensor. The sensor may be associated with the stack side, such as a side edge stop, and / or the stack trailing edge, such as a trailing edge stop.

Preferably, at least two further stops for aligning the delivery stack are provided in the delivery at two further edges of the delivery stack. If a plurality of sensors are used to monitor the further stops, these are preferably also arranged in front of the leading edge stop plane in the sheet transport direction. More preferably, at least two side edge sensors for monitoring the side edge stops the leading edge stop plane upstream in the sheet transport direction. Each side edge stop can be assigned a separate side edge sensor. These, in particular, non-contact side-edge sensors are preferably designed as optical sensors or as ultrasound sensors. Further forming, the stack trailing edge may be associated with a further edge sensor. This further back edge sensor preferably also operates without contact and can be embodied as an ultrasound sensor or optical sensor, for example as a laser beam sensor. Particularly preferred rear edge sensors axially adjustable z. B. may be formed with a braking station to monitor the sheet trailing edges, in particular their falling motion in the lateral area.

The sensors associated with the side edge stops and / or the stack trailing edge can in particular monitor whether a sheet is deposited on one or both side edge stops. For signal evaluation, the sensors are connected to a control device. If a false-sheet projects in the horizontal direction beyond a vertical stop surface of at least one lateral and / or trailing-edge stop, then a signal is generated by the control device, which can be integrated in or part of the machine control, by means of which a machine function can be initiated. A machine function can be the setting of the sheet transport, in particular an emergency stop, be and / or it can be controlled or controlled adjusting elements for the position and / or orientation of the sheet so that the protruding false sheet falls on the stack and not trailing bow be placed more on the stop. By monitoring the side edge stops and / or trailing edge stops the risk of damage to a sheet or the transport devices is reduced.

The monitoring of the sheet transport can take place in such a way that the at least one sensor registers a leaving of a proper transport or fall distance if necessary with the inclusion of tolerances and / or that a steady proper transport or a proper filing is registered. The associated control device accordingly initiates a machine function when the sensor detects that it is leaving the predetermined transport path and / or no properly transported sheet is being registered. Leaving the predetermined transport path can be detected, for example, by means of the at least one sensor by checking whether during a conveying cycle no gripper carriage is detected, because a gripper carriage is hidden by an incorrectly lying arc in the detection direction of the sensor. Further, the sensor could be aimed directly at the misaligned arc.

In a further development, it is provided to arrange the side edge stops arranged laterally of the delivery stack as a straight-line jumper toward and away from the stack. Here can when placing a sheet on the or the Geradstoßern be designed to make a machine function such that then the respective Geradstoßer or both Geradstoßer is accelerated deviating from the periodic movement in the lateral direction or so that as a result of the inertia of the bow of these from the or both gadgets and falls on the pile. The sweeping lateral movement of the or the joggers provides the sheet sufficient space for sinking onto the stack surface. Alternatively or additionally, when resting a sheet on one or both Geradstoßern continue a slider, a blowing and / or Saugluftvorrichtung and / or another conveyor are actuated, so that the sheet in question is returned to the allowable stacking area. Developing a sheet brake is arranged in the delivery, which delays the sheets to be deposited from machine speed to storage speed. As can be triggered by the control device machine function, it may be provided to operate individual brake elements of different braking stations such that a following sheet is stored properly. In this case, the braking effect over the sheet width can be selectively adjusted to achieve a change in position, in particular a twist, the or the subsequent sheet in the desired stacking area. The machine functions to be triggered by the control device can also be selected depending on the printing material or depending on other parameters.

In a delivery of a sheet-processing machine, in the arc to a delivery stack and with a sheet leading edge of the sheet on at least two leading edge stops transporting sheet conveying system of a front edge stop plane spanned by at least two leading edge stops plane sensors for side edge stops are particularly preferably designed such that it determines the location of Monitor side edge of each sheet with respect to the stop surface, and that a signal is issued when the side edge is behind the stop surface of a side edge stop. The side edge stop sensors for the position of the sheet side edge with respect to the stop surface are preferably connected to the control device for evaluating the sensor signals and for performing machine functions. When the signal is output, the control device preferably effects the setting of the sheet transport and / or the activation of one or more actuators in such a way that the sheet lying above a stop sinks onto the stack surface. For an exact measurement of the sheet position, the side edge stop sensors may be arranged and configured such that these transmit measurement signals in a region of the stop adjacent to the stop surface, and that the position of the side edge monitored by means of a measurement of a signal delay between a sensor and the respective arc becomes. The measurement signals can be emitted, for example, against the underside of a sheet lying behind the stop surface sheet.

According to one embodiment, a respective side edge stop has an overlying edge, and a sensor associated with the side edge stop is directed to an area in the vicinity adjacent to the edge. In this case, the sensor can monitor the inner edge and / or the outer edge of the side edge stop. If an ultrasonic distance sensor is provided as the side edge stop sensor, then its detection range is preferably arranged outside a path of the gripper carriages circulating for transporting the sheets. The side edge stop sensor may be fixed to the side edge stop in such a way that they can be adjusted in common, for example, for sheet format adjustment in or against the sheet transport direction and / or transversely to the sheet transport direction.

Preferably, in one embodiment, a delivery of a sheet-processing machine is provided with a sheet to a delivery stack and with a sheet leading edge of the sheet on at least two leading edge stops conveying sheet conveying system, wherein at least one the position of the sheet contactless monitoring detection unit is provided and wherein the at least one detection unit for Monitoring is formed at least one point downstream in the sheet transport direction of a spanned by the at least two leading edge stops leading edge stop plane, wherein the at least one monitored point is preferably within a range extending from the leading edge stop plane beginning to 100 mm in the sheet transport direction. In another embodiment, the monitored point is off-center, d. H. the monitored point is spaced across the machine width from the machine center.

In one embodiment, a delivery of a sheet processing machine includes a sheet delivery system that conveys the sheets to an output stack and to the sheet leading edge at leading edge stops. The sheet conveying system preferably includes gripper systems arranged on traction means, which are conveyed by guide means guided along an orbit. Of the gripper systems, the sheets are brought to a delivery stack arranged in the delivery and released there. The released sheets lie with the leading edge to the Leading edge stops and are thereby aligned. The aligned sheets lay down on the delivery pile. It is a the position of the sheet leading edge contact-free monitoring detection unit provided, which is designed to monitor at least one point, which is downstream in the sheet transport direction of a spanned by the leading edge stops front edge stop plane. Non-contact monitoring is preferably to be understood as continuous non-contact monitoring without mechanical contact with the sheet. The delivery is preferably designed as a single-stack delivery, ie only a single delivery stack is formed in the delivery. Accordingly, only one Stapelhubvorrichtung is provided in this display.

The leading edge stop plane is clamped by at least two front edge stops, which are preferably arranged in a straight line at least in a linear manner, on the front side of the delivery stack. Preferably, however, the leading edge abutments each have leading edge abutment surfaces that span the leading edge abutment plane. The detection unit is arranged such that the point monitored by it lies within a range which extends from the leading edge stop plane beginning to 100 mm in the sheet transport direction. The sheet transport direction is preferably the normal vector to the front edge stop plane spanned by the leading edge stops. The leading edge stop plane here is a space plane. The spatial plane is particularly preferably unbent. As a rule, the leading edge stop plane is vertical, but may also include an angle with the vertical. Advantageously, by monitoring the point in said region, a detection of obliquity can be made. The monitored point is preferably an area of minimum extent, but may also be a geometric area or a surveillance area.

In a further development, the monitored point is arranged at a distance from the front edge stop plane. In a further development of the monitored point is within an area that extends 1 mm after the leading edge stop level beginning to 50 mm in the sheet transport direction. In a particularly preferred development, the monitored point is within an area which extends 2 mm after the leading edge stop plane beginning to 10 mm in the sheet transport direction. This also ensures the detection of minimal obliquity over the leading edge stops. Any machine functions can be triggered with a detected obliquity.

In a further embodiment, the detection unit is designed to monitor at least two points which are at a distance from one another transversely to the sheet transport direction, that is to say over the machine width. Preferably, these two points are equally spaced from the leading edge stop plane. Thus, these are also arranged in the leading edge stops in the sheet transport direction immediately adjacent area. Further, these are at least two points within a minimal sheet format to be processed with the delivery. The machine is designed to process a range of different sheet formats whose upper limit is formed by the maximum sheet size and the lower limit by the minimum sheet size. The technical implementation of the possibility of processing various sheet formats is realized by the formation of means for format adjustment. The machine preferably has format adjustment means such as adjustable sheet guiding elements, stop elements, gripper elements or an activability of subsystems. Particularly preferably, the arrangement of the points to be monitored takes place symmetrically to the machine center, as far as the minimum to be processed sheet format is aligned symmetrically to the machine center. Alternatively, it is possible to move the minimum sheet size to one of the two sides or to put it on a side edge of the machine. In such case, the points to be monitored by the detection unit can be arranged analogously in the minimal sheet format. A shift of a point to be monitored can further z. B. by an adjustment of a sensor, a change of position of the sensor or a deflection of a sensor beam done.

For example, in a medium format press, the minimum working width may be about 45% of the maximum working width to be processed.

Preferably, in the case of a plurality of points to be monitored by the detection unit or the detection units, a differentiated evaluation of the signals obtained is preferably carried out in conjunction with an evaluation unit. In the differentiated evaluation, it is preferable to make a minimal distinction as to whether there is an overshoot arc with respect to the leading edge stops or only a crooked arc with respect to the leading edge stops which lies only partially over the leading edge stops. Correspondingly suitable machine functions are therefore initiated. The machine functions may differ according to the differentiated evaluation of the signals.

In further development, it is provided, further points by the detection unit or the To monitor detection units. As further points, preferably points outside the minimum sheet format are selected. Points are selected in a larger sheet format, in particular at the outer sheet edges of the maximum sheet format, which are preferably evenly spaced from the leading edge stop plane. Most preferably, the other points are arranged approximately as far in the sheet transport direction away from the leading edge stop plane as the arranged in the minimum sheet format points. Thus, all, preferably four, points are also arranged in the area directly adjacent to the leading edge stops in the sheet transport direction. The further points are preferably also in the same horizontal plane as the points set to the minimum sheet format. By so arranged points a detection of the oblique sheets is ensured in the minimum sheet format and advantageously increases the error security in the detection of bow shifts in the maximum sheet size. Alternatively or additionally, scanning sensors arranged in the minimal sheet format can also be designed to be adjustable and / or movable. In particular, a mobility of the scanning sensors transversely to the sheet transport direction can allow adjustment to the current sheet size. The other points lying outside the minimum sheet format can also be monitored by adjustable or movable scanning sensors. The scanning sensors may include, for example, sensors / receivers.

In a further development, the detection unit monitors at least two points which are spaced one behind the other in the sheet transport direction. Accordingly, these points are preferably at different distances from the front edge stop plane, wherein at least the first point in the sheet transport direction is within a range from the front edge stop plane to 100 mm in the sheet transport direction. The monitoring of the at least two points can be done by a single detection unit or by multiple detection units. The monitored points are preferably evaluated independently of one another by an evaluation unit connected to the at least one detection unit or can be evaluated differently with respect to one another. Particularly preferably, an evaluation of the two successive lying in the sheet transport direction points independently of each other, such that when a detected overshoot a machine function is triggered, which is independent of the evaluation of the other point. In particular, an emergency stop is initiated when a safety-relevant overshoot arc is detected in the point downstream in the sheet transport direction.

In a preferred embodiment, the monitoring of the at least one point by the detection unit by means of a sensor beam generated by the detection unit. The detection unit has for this purpose a sensor / receiver, wherein the sensor for generating the sensor beam and the receiver for receiving this beam are set up. Sensor / receiver can be arranged on opposite sides of the rotating gripper systems or be arranged above or below the rotating gripper systems and cooperate with an opposite reflector. It is preferably provided to equip the detection unit with a sensor / receiver and a reflector, wherein the reflector is arranged on the side opposite the sensor / receiver side of the rotating gripper systems. Particularly preferably, the reflector is associated with the leading edge stops, whereby a compressed construction can be achieved. The reflector can be arranged at least partially between two leading edge stops. Particular preference is given to using optical sensors such as photosensors, for example lasers. However, ultrasonic sensors or other suitable sensors can also be used.

Developing this, the reflector is associated with a frame-fixed recording, wherein the reflector can also be integrated in the surface of the recording. On the recording and other machine elements, such as sample sheet fingers can be arranged. The sensor / receiver of the detection unit is advantageously arranged on a holder within a deflection region of the sheet conveying system. In particular, the holder is designed as a traverse arranged over the machine width, which has an opening for the sensor / receiver. The traverse can be connected independently or with a blow frame. As a holder but also the blow frame itself can be used. The sensor beam monitors the area between transmitter / receiver and in the version with a reflector between the transmitter / receiver and the reflector. The sensor beam is preferably formed at least approximately parallel to the leading edge stop plane and most preferably at least approximately perpendicular.

In a further development, it is provided to carry out the monitoring of the at least one point also during a test sheet removal and / or a stack change. Particularly advantageous is a permanent monitoring of at least one point, with only passing gripper systems are hidden. It may be provided to filter or hide an error signal caused by the gripper systems. Preferably, the suppression of the gripper systems takes place under consideration of tolerances. As tolerances For example, 5 ° to 10 ° relative to a machine angle can be provided before and after a gripper system. Particularly preferably, an uninterrupted monitoring takes place in each case between two immediately successive gripper systems.

In a further development, it is provided to assign a cleaning unit to the sensor / receiver and / or the reflector of the detection unit. The cleaning unit preferably operates pneumatically to clean the sensor / receiver unit and / or the reflector. The cleaning by the cleaning unit is preferably carried out as needed or at intervals as instructed by the printer or automated.

In another embodiment, a delivery of a sheet processing machine includes a sheet delivery system conveying the sheets to a delivery stack and the sheet leading edge to leading edge stops. The sheet conveying system preferably includes gripper systems arranged on traction means, which are conveyed by guide means guided along an orbit. Of the gripper systems, the sheets are brought to a delivery stack arranged in the delivery and released there. The released bows are aligned with the leading edge on the leading edge stops and are thereby aligned. The aligned sheets lay down on the delivery pile. It is a the position of the sheet leading edge monitoring detection unit provided, which is designed to monitor at least one point. The detection unit is in this case designed to detect the angular position of the sheet leading edge with respect to the leading edge stops or for detecting the presence of a sheet at at least two spaced-apart points and with respect to the spaced points differentiating monitoring.

The position of the sheet leading edge preferably means the presence or absence of a sheet area at a defined time or the qualitative angular position of the sheet leading edge preferably in relation to a reference point or a reference line o. Ä., Or the quantitative angular position of the sheet leading edge. Preferably, angular position is understood to mean the position of the respective sheet leading edge relative to the front edge stop plane spanned by the leading edge stops. The angular position of the sheet leading edge is preferably considered in a horizontal plane, particularly preferably at the level of the stack surface. The angular position can preferably be expressed in terms of the number of degrees.

A differentiated monitoring of two spaced apart points means that a minimal distinction can be made between an overshoot arc, which lies with its entire leading edge over the leading edge stops, and a skewed bow, which lies only partially over the leading edge stops. As a result, it can be determined with certainty whether overspill sheets or oblique sheets are fed to the delivery stack. This makes it possible to correct the position of these sheets during the machine run or to empty the sheet-processing machine and subsequently to make a correction. As a result, the accumulated waste and machine downtime can be reduced and thus the efficiency of the sheet-processing machine can be increased.

Further, it is provided to monitor with the detection unit at least two longitudinally and / or transversely to a sheet transport direction spaced from each other arranged points. In this case, the two spaced-apart points are preferably transversely to a sheet transport direction within a characteristic for the sheet-processing machine minimal sheet format. Particularly preferably, the detection unit for monitoring the at least one point within a range from the leading edge stop plane, starting in the sheet transport direction to 100 mm, is followed by a further detection unit. The further detection unit is preferably associated with a deflection stack of the sheet conveying system assigned to the delivery stack. In particular, the further detection unit is arranged to monitor an area after the reversal point of gripper systems of the sheet conveying system. Preferably, the area monitored by the further detection unit is arranged at an angle of 0 ° to 90 °, more preferably between 60 ° and 80 ° to the horizontal. With the further detection unit, at least one further point is preferably monitored. The further point is particularly preferably spaced at least 200 mm from the monitored point located in the region of the leading edge stops. By the detection unit or the detection units, the position and / or presence of a sheet is preferably monitored without contact. Particularly preferably, the position and / or presence of the sheet is detected in the sheet transport direction after the leading edge stops by the detection unit or the detection units. In order to detect the erroneously filed sheets, the detection unit or the detection units can have scanning sensors, for example with sensors / receivers. In a further development, each of the scanning sensors interacts with a cleaning unit.

In a further development, the detection unit or the detection units distinguishes between an overshoot arc with respect to Leading edge stops and a crooked bend with respect to the leading edge stops, whereby depending on the evaluation, different machine functions can preferably be initiated or triggered. In the case of a detected obliquity bend, it is possible, for example, to actuate an operating unit, empty the machine or even initiate an emergency stop. A Leedrucken the machine is preferably carried out depending on the sheet material, in particular a printing material, preferably in dependence on the basis weight, so that the necessary security is guaranteed. In the machine located thin substrates can be partially or completely printed, for example, while thicker substrates such. B. cardboard z. B. with a basis weight greater 150g / m ² require an emergency stop. Further development can be done by the operating unit and an indication of the oblique arch, in particular in relation to the leading edge stops. Further education can be changed by the machine function a delivery setting and / or the operating unit to issue a printer instruction. The printer instruction may then be supplied to or confirmed by an operator.

In addition, however, it is also possible to evaluate which region of a slant arc lies above the leading edge stops. In a further development, the concrete tilt of the obliquity bend can also be recorded in terms of the number of degrees. This can be done in particular to a straight line formed by at least two leading edge stops. Preferably, the straight line is formed by the leading edge abutment surfaces of the leading edge stops at the level of the stacking surface or at the upper edge of the leading edge stops facing the gripper carriage. The position of the sheet can be displayed accordingly or corrected by setting suggestions or setting changes.

In one embodiment, the detection unit can monitor the presence of an arc at defined times, preferably in a defined machine state, in particular at a defined machine angle in at least two points, these points lying in a first variant transversely to the sheet transport direction and in another variant along the sheet transport direction. In a further variant, points can be monitored both transversely and along the sheet transport direction. The detection unit can have a plurality of scanning sensors, in particular for monitoring the at least two points. Particularly preferably, the monitoring of the transverse to the sheet transport direction points by a first detection unit and the subsequent in the sheet transport direction further point is carried out by a further detection unit. Very particularly preferably, the monitoring of the transverse to the sheet transport direction points from the first detection unit via a plurality of scanning sensors and the subsequent point by the further detection unit by means of another Abtastsensors. The scanning sensors may for example comprise sensors / receivers. Alternatively, these points can be monitored in all variants of at least one detection unit, for example via a camera.

The assignment of a further detection unit in a wider area, in particular in a reversal area of the bow conveyor on the delivery stack conveying sheet conveying system allows control of the conveyor system associated gripper systems on entrained bow and thus excludes an accident of the sheet processing machine. Due to the spacing of the further detection unit from the leading edge stops, a safety-relevant overshoot arc can be reliably deduced when the overshoot sheet is detected, with detected pieces of paper also being classified as safety-relevant overshoot sheets. An emergency stop of the machine is preferably carried out in the case of a signal generated by the further detection unit. In this case, the emergency stop is particularly preferably independent of the signal evaluation of the upstream detection unit. Particularly advantageously, the further detection unit increases the security for the printer that no sheet was conveyed back to the machine even in a crooked or overflow sheet detected by the upstream registration unit. Previously necessary complex searches for non-existent safety-relevant sheet in the display are reduced or avoided.

The at least one detection unit detects in another embodiment, the angular position of the sheet leading edge with respect to the leading edge stops. Here, the angular position of the sheet leading edge of the deposited sheet can be monitored before the leading edge stops, at least partially over the leading edge stops and / or after the leading edge stops. The detection unit may have a camera, in particular a CCD camera, as a sensor. By the detection unit is influenced in accordance with the detected misplacement of the bow of the filing process and / or appropriate information is provided. The angular position can be detected, for example, in terms of the number of degrees or as the distance to a stop in a unit of length, preferably in millimeters.

A defined hiding of the gripper carriage during the passage of the detection unit or the detection units takes place via a mechanism and / or a software. Preferably blanking is performed by angle values determined on a sprocket main shaft. While a gripper carriage passes through the Ausblendbereich a generated by the detection unit signal is therefore not evaluated as skew or overshoot. The detection unit or the detection units monitor the sheet particularly advantageously completely contactless.

Since a Schiefbogen lies only partially above the leading edge stops, he is partially still held by at least one leading edge stop, so that in a Schiefbogen can not be closed directly to a security-related event. As a result of the evaluation of the detection unit, either an emergency stop can be initiated as the safest variant when the oblique arc is detected. Alternatively, however, in a further variant, after the determination of a slant arc, all the sheets present in the machine can be deposited at a continuous printing speed. This advantageously results in a significantly reduced expenditure of time, as compared to an emergency stop not conveyed out in the machine bow out, in particular herausgetippt must be. In this case, a distinction according to the type of bow used is provided for the purpose of avoiding accidents. In particular, z. B. at a basis weight above 150 g / m ^2, a first machine function and below this basis weight another machine function can be initiated. In order to avoid accidents, a distinction can be made in a printing press according to the type of substrate used, for example cardboard and paper. In carton processing, z. B. at a basis weight greater than 150 g / m ² , therefore, an emergency stop is initiated by the machine control after detected inclined sheet according to the first variant and in paper processing, for. B. at a basis weight less than 150 g / m ² , a blank printing of the machine according to the second variant carried out.

In a further alternative variant, the machine is not stopped, but special mechanisms ensure stapelgerechte position correction of the bow. This can be done by instructions to the printer, by suggesting changes to settings, automatic settings changes or actuator activation. For a Aktoransteuerung all the sheet storage active or passive influencing actuators come into consideration, such as the movement of the front and / or side edge stops, the fan setting, the setting of individual or all brake elements, etc. or the Stapelhubvorrichtung. The action of the printer is improved by displaying the skew and / or printer instructions. The printer can thus receive information to improve the sheet deposition by hand or by changing the delivery setting. In a further development, it is provided to select the intended function, in particular the machine function, as a function of the printing material used, the side of the imbalance, the degree of skew and / or other boundary conditions.

In the following, the invention will be explained by way of example. The accompanying drawings show:

1 : the schematic representation of a delivery in side view;

2 a top view of the delivery stack with properly filed bow;

3 a top view of the delivery stack with lying over a side edge stop false bows;

4 : the fragmentary representation of a gripper carriage with a leading edge stop;

5 a top view of the delivery stack with Schiefbogen;

6 : the principle of a cleaning unit in side view;

7 : a development of the delivery in side view;

8th : Top view of the grid structure with integrated reflectors;

9 : perspective view of a section of the display with grid structure;

10 : Further development of the display with cleaning unit integrated in the traverse;

11 : Detail of the top view of the exhibition pile;

12 : Delivery stack seen in sheet transport direction with sensor-monitored side-wheel bumpers;

13 : Top view of a delivery stack with trail edge sensors;

14 : Side view of a brake station associated with the rear edge sensor;

15 : Side view of a brake station associated rear edge sensor in combination with a stacking distance sensor;

16 : Stack floor plan with possible surveillance areas.

In 1 is a display of a sheet-processing machine, here in particular a sheet-fed press, especially a sheet-fed rotary printing machine preferably in aggregate and series construction, shown. The machine is operated in accordance with the offset method, although other printing methods such. B. screen printing can be integrated in the machine. In the works of the machine are the bows 7 gripped by gripper systems of rotating cylinders at the front edge and passed between the cylinders in the gripper closure. In the printing units are the bow 7 in a printing gap formed by a cylinder and a blanket cylinder with one printing ink in each case. Further, one or more Lackwerke can be provided, in which the bow 7 can be painted by a paint form cylinder. The cylinders arranged in the machine may be of single or multiple size, with a single-sized cylinder having at least one arc 7 maximum format can accommodate circumferentially. Preferably, the cylinders are made double size. The machine can also be a turning device for turning the bow 7 in one mode perfecting during the machine run included. Next can also processing facilities or processing plants, such. B. cold foil works, be integrated in the machine.

From the sheetfed press is a last here double-sized impression cylinder 1 shown schematically. From the display are a drive sprocket 2 and a Umlenkkettenrad 3 shown. The sprockets 2 and 3 are each with a wave 4 . 5 connected to which coaxially spaced another drive sprocket 2 or a Umlenkkettenrad 3 are arranged. About the sprockets 2 . 3 each becomes an endless chain 6 , which forms a chain circle, led. Between two chain circles are at a constant distance to each other, the bow 7 holding gripper carriage 8th arranged. The sprockets 2 . 3 and the chains that wrap around them 6 form together with the gripper carriage 8th a sheet conveying system, which can also consist of other elements. In particular, the deflection of the gripper carriage 8th instead of the deflection sprockets 3 also done by deflecting guides. The revolving guided gripper carriage 8th have gripper systems for the acquisition of the bow 7 at the front edge of the printing cylinder 1 on.

For a safe transport of the gripper cars 8th held bow 7 are in the delivery a sheet guiding device and for quality assurance of processed in the sheet-fed rotary printing machine sheet 7 for example a dryer 19 and / or a pollination unit 20 intended. The sheet guiding device can be a gripper carriage 8th facing sheet guide plate 18 which is provided with blowing air nozzles and extends over the machine width. Under the sheet guide plate 18 preferably blow boxes are arranged, via which the Blasluftdüsen be supplied with blowing air, so that between the sheet guide 18 and that of the gripper car 8th transported bow 7 especially for perfecting a Tragluftpolster can be formed. To gluing the bow 7 on the delivery pile 9 to avoid are over the sheet guiding device, in particular over the sheet guide plate 18 , Dryer 19 and one the bows 7 powdery pollination unit 20 provided, it is also possible to heat the sheet guide plate 18 in the area of the dryer 19 to control or to be able to integrate a coolant circuit.

From the display is still a delivery pile 9 coming from a stacking plate 10 is shown. The stacking plate 10 is an unillustrated hoist, by means of lifting chains 11 on the stacking plate 10 attacks, assigned. Furthermore, from the display front edge stops 12 , a brake unit 13 and trailing edge stops 14 shown. The leading edge stops 12 and the trailing edge stops 14 are spaced apart on a transverse to a sheet transport direction 39 extending axis arranged (eg. 2 . 3 or 5 ). The brake unit 13 can z. B. a transversely to the sheet transport direction 39 extending suction roll or, as shown in the embodiment, circumferentially, spaced from each other arranged brake elements, such as suction rings or suction belts 13.1 , exhibit. Alternatively, the brake unit 13 also include Nachgreifer.

The 2 shows a plan view of the delivery stack 9 with properly at the leading edge stops 12 filed bow 7 that the delivery pile 9 form. The leading edge stops 12 are here preferably symmetrical to a machine center 38 arranged shown. The brake unit 13 Here, for example, contains four transverse to the sheet transport direction 39 arranged with suction belts 13.1 equipped braking stations, each suction belt 13.1 a sheet to be filed 7 subjected to a braking force. The suction belts 13.1 are preferably symmetrical to the arc axis of symmetry in the sheet transport direction 39 , The side edges of the bow 7 lie parallel to the sheet transport direction 39 , The delivery pile 9 is at least one more stop 16 . 14 to align the delivery stack 9 at another edge of the delivery pile 9 assigned. The side edges of the bow 7 are preferred here by a respective side edge stop 16 aligned. The side edge stops 16 are executed here in one piece, but can also be designed in several parts. The side edge stops 16 can extend over the entire arc length or only over parts of the arc length. Further education can the side edge stops 16 for format adjustment, for example, together with the brake unit 13 be adjusted. Further education, it is provided, the side edge stops 16 as transverse to the sheet transport direction 39 movable side-wheel bumpers 16 perform. The side rash pushers 16 can each have a stop plate, a longitudinal guide and a linear drive. With proper sheet storage lies the bow 7 centered to the stop plates of the Seitengeradstoßer 16 , Further education are also at the trailing edge of the delivery pile 9 for example, below the brake unit 13 in particular movably mounted trailing edge stops 14 intended.

The side edge stops 16 is at least one sensor 17 . 15 for monitoring the sheet position with respect to the side edge stops 16 assigned. The sensor can 17 . 15 both side edge stops 16 monitor or it is every side edge stop 16 a side-edge sensor 17 assigned. The sensor (s) 17 . 15 can be spaced or near the side edge stops 16 be arranged. The sensor (s) 17 . 15 can also be arranged at the trailing edge preferably in the lateral area. In the illustrated embodiment, each side edge stop is 16 a side-edge sensor 17 allocated adjacent. The side-edge sensors 17 can do the side stops 16 be permanently assigned. In a preferred embodiment, the side of the stop plates of the side edge stops 16 arranged side edge sensors 17 designed as ultrasonic distance sensors, each emit a measuring beam in the vertical direction on the underside of the sheet. Alternatively or additionally, the side-edge sensors 17 but also the area of the stack floor plan 9.1 Monitor while doing the duly falling bow 7 detect. The side-edge sensors 17 are connected to a control device in signaling connection. Further training is also the drives of Seitengeradstoßer 16 with this control device, which may be part of the machine control or may be integrated in the machine control, in conjunction.

The 3 shows a not properly stored so-called. False sheets 7.1 which at least partially on a stop plate of a side edge stop 16 has filed. In this position, the measuring beam of the side edge sensor hits 17 on the underside of the overlying the stop plate false arch 7.1 , According to the transit time principle, the side-edge sensor designed as an ultrasonic distance sensor can 17 generate a signal which notifies the control device that a false arch 7.1 over a stop plate of a side edge stop 16 lies. Further, the control device by evaluation of both side edge sensors 17 determine on which of the side edge stops 16 or side impact pusher 16 the false arch 7.1 is stored. The detection depth of the ultrasonic distance sensor is preferably to be dimensioned such that during the passage of a gripper carriage 8th no false arch 7.1 is signaled. The control device preferably processes a machine angle transmitted by a rotary encoder during the initiation of a machine function.

Preferably, a machine stop, in particular a quick stop, is initiated by the control device as a machine function if a false-arc 7.1 is detected. The machine function can be dependent on the printing material. For example, a machine stop may be initiated when paperboard sheets are being processed and another machine function when no paperboard sheet is being processed. Further education, it is provided, the one or more Seitengeradstoßer 16 to control such that the false arch 7.1 from the stopper plates or down to the surface of the delivery stack 9 falls. In the case of an ultrasonic distance sensor, a signal is delivered that contains a false-arc 7.1 is on a stop plate, then by means of the control device, a drive, in particular the linear drive of the Seitengeradstoßers 16 , are controlled so that the stop plate for aligning the false arch 7.1 is moved away from the stack side surface. By an occurring acceleration of the stop plate drops the false sheet 7.1 by its inertia from the stop plate down to the surface of the delivery stack 9 , The stop plates can be made beveled at the top thereof outwardly. Is the original false-arch 7.1 properly on the delivery pile 9 filed another orientation of the following bow 7 through the Seitengeradstoßer 16 respectively.

In a further development, it is provided with the at least one side edge sensor 17 the location of the false arch 7.1 to be determined quantitatively. Preferably, the value of the supernatant of the false arch 7.1 over the side edge stop 16 and / or an angle value of the side edge of the false arch 7.1 to the sheet transport direction 39 be determined. This is preferably done by means of the control device, which from the data obtained, the lateral movement of the or the side-gerstoßer 16 including the necessary stroke determined. The in normal operation a periodic shaking motion performing side ratchet 16 be adjusted by the control device in case of need briefly to the necessary stroke. In a determined imbalance of the false arch 7.1 may alternatively or additionally an actuator control for correcting the skew of the false sheet 7.1 and / or the following bow 7 be made. For example, the imbalance by targeted change in the speed and / or braking effect of the brake elements of the brake unit 13 done over the sheet width.

In 4 is above the leading edge stops 12 a gripper carriage 8th with a chain guide 22 shown in the deflection area. Above the leading edge stops 12 and the revolving gripper carriage 8th is on a holder 23 a detection unit 24 positioned. The registration unit 24 has at least one here but preferably two Abtastsensoren 25 . 26 on, which are spaced from each other. The scanning sensors 25 . 26 are transverse to the sheet transport direction 39 and arranged so as to detect the presence or absence of the to the delivery stack 9 and with the sheet leading edge at least partially over the leading edge stops 12 transported oblique arch 7.2 is possible. The scanning of the leading edge stops 12 in the sheet transport direction 39 subsequent leading edge monitoring area 12.3 through the scanning sensors 25 . 26 takes place at points 25.4 . 26.4 by sensor beams 25.3 . 26.3 , The sensor beams 25.3 . 26.3 cut the points to be monitored 25.4 . 26.4 , The leading edge monitoring area 12.3 extends from that of the leading edge abutment surfaces 12.1 the leading edge stops 12 clamped leading edge stop level 12.2 in the sheet transport direction 39 up to 100 mm, preferably from 1 mm to 50 mm and more preferably from 2 mm to 10 mm. The in this leading edge surveillance area 12.3 located points 25.4 . 26.4 are preferably spaced from the leading edge stop plane 12.2 , so that, for example, a movement of the delivery pile 9 during lowering no error signals generated. The monitoring is preferably carried out at defined times or at defined machine angles, preferably constantly when no gripper carriage 8th the sensor beams 25.3 . 26.3 happens. In the same way overspill, which over all the sheet format concerning front edge stops 12 protrude, recorded. Alternatively or additionally, by the detection unit 24 also the concrete position of the bow 7 to the leading edge stops 12 be recorded.

The 5 shows a plan view of the delivery stack 9 with properly at the leading edge stops 12 filed bow 7 that the delivery pile 9 form. The leading edge stops 12 are here preferably symmetrical to a machine center 38 arranged shown. The registration unit 24 monitors here preferably with the scanning sensor 25 and the scanning sensor 26 in the leading edge surveillance area 12.3 the leading edge stops 12 a working width across the sheet transport direction 39 , The working width is at least transversely and horizontally to the sheet transport direction 39 extending extent of a minimum to be processed by the machine sheet format 27 , Shown is also the possible position of a crook 7.2 above the delivery pile 9 ,

The monitoring of the sheet position is particularly preferably contactless. The scanning sensors 25 . 26 the registration unit 24 For example, they can be designed as optical, in particular photoelectric, sensors or as ultrasonic sensors. In the illustrated embodiment contain the Abtastsensoren 25 . 26 one transmitter / receiver each 25.1 . 26.1 and one reflector each 25.2 . 26.2 , Preferred are transmitter / receiver 25.1 . 26.1 on one side and the reflectors 25.2 . 26.2 arranged on the opposite side of the gripper carriage track. This minimizes the necessary cabling. The reflectors 25.2 . 26.2 are here between the leading edge stops 12 arranged shown. In alternative embodiments, not shown, the reflectors 25.2 . 26.2 also with the leading edge stops 12 be connected or the leading edge stops 12 even as reflectors 25.2 . 26.2 be used. The registration unit 24 is connected via an evaluation unit with the machine control station and / or the machine control, wherein the evaluation unit can also be integrated in the machine control. The machine control can therefore also with the side edge sensors 17 and / or the rear edge sensors 15 be connected and evaluate their signals together. The distance of the scanning sensors 25 . 26 is preferably chosen such that it is just within a characteristic of the sheet-processing machine minimal sheet format 27 lie. Alternatively, the scanning sensors 25 . 26 also have a sensor element on one side of the gripper carriage track and a cooperating with this receiver element on the other side of the gripper carriage track. At least one of these elements is below the highest point of the leading edge stops 12 arranged.

The one in the delivery between the chains 6 arranged and constantly with these rotating gripper carriage 8th capture those on the impression cylinder 1 lying bow 7 at the sheet leading edge and transport these on the sheet guiding device, in particular the sheet guide plate 18 , as well as the brake unit 13 in the sheet transport direction 39 to the delivery pile 9 , Go through the bow 7 the area of the brake unit 13 For example, they are sucked by the suction belts 13.1 captured and from the gripper carriage 8th Approved. By means of the brake unit 13 become the bow 7 delayed to a transport speed reduced storage speed and released after reaching this speed, so that the released bow 7 with the filing speed against the leading edge stops 12 as well as under alignment with these and at the opposite trailing edge stops 14 aligned the delivery pile 9 be deposited forming the delivery pile 9 according to the filed bow 7 is lowered so that the stacking surface is a constant level for incoming sheets 7 having.

Usually are on the sides of the delivery pile 9 the side edge stops 16 or side impact pusher 16 arranged the arches 7 Align the position of their side edges and those of the side edge sensors 17 and / or rear edge sensors 15 be monitored. Now, for example, as in 5 shown by the suction belts 13.1 the brake unit 13 a crooked arch 7.2 so on the delivery pile 9 filed that an interruption of the beam path of the sensor beam 26.3 of the scanning sensor 26 is done in one of the detection unit 24 downstream evaluation unit generates a signal which a Schiefbogen 7.2 displays. Thus, the sheet feed to the sheet processing machine interrupted, this empty and the Schiefbogen 7.2 removed or its location corrected.

It is also possible after a crook 7.2 was displayed, the machine continues to operate and the position of the crook 7.2 on the delivery pile 9 to correct.

In 4 is the holder 23 another detection unit 29 assigned. This further registration unit 29 has at least one further scanning sensor 30 on, which is formed in the embodiment as an optical, in particular photoelectric, sensor and a transmitter / receiver 30.1 and a reflector 30 .2 contains. The further registration unit 29 is arranged in the display that about the deflection of the gripper carriage 8th can be detected. Through the further registration unit 29 this area is monitored to see if bow 7 or parts of these from the gripper carriages 8th were carried away. If that is the case, can by means of one with the other detection unit 29 cooperating evaluation unit, the generation of an emergency stop signal, which can be fed to the machine control and displayed on the control station. This can be an accident of the sheet processing machine by the gripper carriage 8th entrained bow 7 be prevented.

Through the further registration unit 29 is preferably also ensured that it by means of the detection unit 24 detected overshoot arch or oblique arch 7.2 which is an emptying of the machine and / or a correction of the sheet position on the delivery pile 9 condition, in fact to such arc 7 is. In order to avoid error signals during the passage of the gripper carriage 8th through the sensor beams 25.3 . 26.3 . 30.3 these error signals must be hidden. This is done here by a half-cycle driven switching flag, which activates angle-dependent arranged initiators. Alternatively, those of the gripper carriage 8th caused error signals via a software o. Ä. Are filtered.

To put in sheet-fed rotary printing machines a color change of the freshly printed sheets 7 To avoid, can over the pollination unit 20 Powder between those on the delivery pile 9 to be filed bow 7 to be brought. Despite known means for preventing the deposition of powder on the work organs provided in the display can not be ruled out that powder z. B. on the Abtastsensoren 25 . 26 . 30 the registration units 24 . 29 deposits, which can lead to malfunctions. To ensure safe operation of the registration units 24 . 29 to allow one or each capture unit 24 . 29 , in particular one or preferably each scanning sensor 25 . 26 . 30 , at least one cleaning element to be assigned.

The 6 shows one of the scanning sensors 25 . 26 . 30 assigned cleaning unit 31 containing in the embodiment a nozzle unit 32 with a blast air supply 33 , Preferably, each of the scanning sensors 25 . 26 . 30 a nozzle unit 32 assigned. Each nozzle unit 32 is in particular with a first outlet opening 32.1 and a second exit opening 32.2 provided, wherein the blown air jet 34 the first outlet 32.1 on the sensor / receiver 25.1 . 26.1 . 30.1 and the blown air stream 35 the second outlet opening 32.2 on the reflector 25.2 . 26.2 . 30.2 is directed. For cleaning the scanning sensors 25 . 26 . 30 the registration units 24 . 29 be by means not shown, the Blasluftzuführungen 33 activated and so powder deposits removed. The cleaning unit 31 can be executed arbitrarily operable or their activation to certain steps, such as the change of the delivery pile 9 be coupled.

The 7 shows a development of the display with a detection unit 24 for detection of overshoot arch and oblique arch 7.2 in the leading edge stops 12 in the sheet transport direction 39 downstream leading edge surveillance area 12.3 , The registration unit 24 also here has at least two spaced apart Abtastsensoren 25 . 26 on which sensor beams 25.3 . 26.3 preferably parallel to the leading edge abutment surfaces 12.1 the leading edge stops 12 formed leading edge stop level 12.2 produce. The leading edge stop surfaces 12.1 the leading edge stops 12 are the ones to the delivery pile 9 directed surfaces, where the correctly released and filed bow 7 be aligned at the front edge. The leading edge stop surfaces 12.1 the leading edge stops 12 have at least one vertical extension and preferably an extension transverse to the sheet transport direction 39 , in particular a horizontal extension, on. Each scanning sensor 25 . 26 here preferably has a sensor / receiver 25.1 . 26.1 and a reflector 25.2 . 26.2 on. The sensors / receivers 25.1 . 26.1 are within the gripper carriage track in the deflection of the gripper carriage 8th a holder 23 assigned. The holder 23 can, for example, be arranged as a cross-section of the machine width with openings for the sensors / receivers 25.1 . 26.1 be executed. The traverse can be connected independently or with a blow frame. As a holder 23 but also the blow frame itself can be used.

The reflectors 25.2 . 26.2 are here assigned a arranged below the gripper carriage track recording over the machine width with recesses for the leading edge stops 12 Is provided. The receptacle is preferred here as arranged across the machine width traverse or lattice structure 36 executed, with the reflectors 25.2 . 26.2 can be integrated in the surface of the recording. Preference is given to a frame-fixed arranged grid structure 36 used, which receives more machine elements on its underside. The machine elements are here separating elements, in particular sample sheet fingers 37 , which for sample extraction in the direction of the delivery pile 9 between falling bows 7 to accommodate this are retractable. The sample sheet fingers 37 are designed here as a pneumatic cylinder. Due to the frame-fixed arrangement of the recording remain the connected reflectors 25.2 . 26.2 also stationary and active during a test sheet extraction. The leading edge stops 12 can be made pivotable for sample sheet removal. Accordingly, a monitoring of the filing process can also take place uninterruptedly during a test sheet extraction. Even during a stack change, in particular a non-stop stack change, can by the detection unit 24 the filing process can be monitored without interruption.

The display contains here further education one of the detection unit 24 in the sheet transport direction 39 downstream further detection unit 29 for the detection of machine-damaging overspill. The in the direction of the rotating gripper carriage 8th the registration unit 24 downstream further detection unit 29 here also has another scanning sensor 30 with a sensor / receiver 30.1 and a reflector 30.2 on. Also preferred is the sensor / receiver 30.1 the further detection unit 29 in an opening of the trained as Traverse holder 23 added. Via a connection of the registration units 24 . 29 via a common evaluation unit or each registration unit 24 . 29 associated evaluation units with a controller, in particular the machine control, and preferably the control station corresponding information and / or functions, in particular machine functions, triggered. At least one but preferably all of the sensors / receivers 25.1 . 26.1 . 30.1 and reflectors 25.2 . 26.2 . 30.2 is also a cleaning unit here 31 assigned.

The 8th shows a plan view of the grid structure 36 with integrated reflectors 25.2 . 26.2 in the display. The grid structure 36 here preferably has in the sheet transport direction 39 oriented slots on which allow air circulation in the display. The reflectors 25.2 . 26.2 are here in the gripper carriage track facing surface of the grid structure 36 integrated. The reflectors 25.2 . 26.2 lie within a distance to each other, the here the minimum to be processed by the machine sheet material so the minimum sheet size 27 equivalent. That means the reflectors 25.2 . 26.2 are arranged so far apart that the smallest to be processed sheet size across the machine width nor one of the reflectors 25.2 . 26.2 in the case of a crooked bow 7.2 and both reflectors 25.2 . 26.2 covered in the event of an overshoot arc.

The 9 shows a perspective view of a section of the display with in the lattice structure 36 integrated reflectors 25.2 . 26.2 , The ones with the reflectors 25.2 . 26.2 interacting sensors / receivers 25.1 . 26.1 are above and more preferably perpendicular above the reflectors 25.2 . 26.2 within the deflection of the gripper carriage 8th arranged. The sensor / receiver 30.1 the further detection unit 29 acts with a reflector, not shown 30.2 together, in the direction of rotation of the gripper carriage 8th preferably after the turning point outside the chain guides 22 is arranged approximately in the middle of the machine width.

The 10 shows a preferred embodiment of the display with in the example designed as Traverse holder 23 integrated cleaning unit 31 for all scanning sensors 25 . 26 . 30 the registration units 24 . 29 in the sheet transport direction 39 seen. The cleaning unit 31 contains an actuated blast air supply 33 that the each scanning sensor 25 . 26 . 30 associated nozzle unit 32 supplied with blast air. The cleaning unit 31 Available pneumatic pressure is preferably manually or automatically adjustable and is particularly preferably monitored. The blowing air supply 33 acts with a side of the example designed as a Traverse holder 23 associated connection together and distributes the applied blowing air on here two exemplified Distributor to the nozzle units 32 the scanning sensors 25 . 26 . 30 , Each nozzle unit 32 directs the applied blown air also here preferably on the sensors / receivers 25.1 . 26.1 . 30.1 and the reflectors 25.2 . 26.2 . 30.2 as already described above.

The 11 shows a section of the top view of the delivery pile 9 with within a transversely to the sheet transport direction 39 extending minimum working width, ie within a characteristic for the sheet processing machine minimal sheet format 27 , arranged leading edge stops 12 , The properly filed bow 7 lie in the direction of sheet transport 39 at the leading edge stop surfaces 12.1 the leading edge stops 12 from. The from the scanning sensors 25 . 26 the registration unit 24 monitored points 25.4 . 26.4 lie in the direction of sheet transport 39 the leading edge stop level 12.2 downstream in a leading edge monitoring area 12.3 and across the sheet transport direction 39 within the in the sheet transport direction 39 over the leading edge stop plane 12.2 extended minimum arch format 27 ,

It becomes a delivery for a sheet-processing machine with a bow 7 to a delivery pile 9 and with a bow leading edge of the bow 7 at least two leading edge stops 12 transporting sheet conveying system, wherein the at least two leading edge stops 12 a leading edge stop plane 12.2 span, with at least one other stop 16 . 14 to align the delivery stack 9 at another edge of the delivery pile 9 is provided and wherein at least one detection unit 24 . 29 to monitor at least one point 25.4 . 26.4 . 30.4 is formed, in the sheet transport direction 39 the leading edge stop level 12.2 is downstream and where continue at least one of the leading edge stop level 12.2 in the sheet transport direction 39 upstream point 17.2 . 15.2 is monitored. At least one sensor is preferred 17 . 15 to monitor at least one point 17.2 . 15.2 formed, in the sheet transport direction 39 the leading edge stop level 12.2 is upstream.

The at least one registration unit 24 . 29 is especially as the leading edge stop level 12.2 downstream point 25.4 . 26.4 . 30.4 non-contact monitoring detection unit 24 . 29 educated. Preferably, the at least one detection unit 24 . 29 to monitor at least two points 25.4 . 26.4 . 30.4 formed, which transverse to the sheet transport direction 39 spaced from each other the leading edge stop plane 12.2 lie downstream. The at least one of the leading edge stop plane 12.2 downstream point to be monitored 25.4 . 26.4 . 30.4 or the at least two monitored points 25.4 . 26.4 . 30.4 are preferably within a transversely to the sheet transport direction 39 extending minimum working width 27 , in particular within a minimal sheet format to be processed with the delivery 27 , The at least one registration unit 24 . 29 is particularly preferred one for monitoring the at least one point 25.4 . 26.4 . 30.4 used sensor beam 25.3 . 26.3 . 30.3 generating arranged. For this, the at least one detection unit 24 . 29 at least two a sensor beam 25.3 . 26.3 . 30.3 have limiting elements.

Next to the leading edge stop level 12.2 in the sheet transport direction 39 downstream at least one point 25.4 . 26.4 . 30.4 can also be the one or the front edge stop level 12.2 upstream points 17.2 . 15.2 from the at least one detection unit 24 . 29 be monitored. Alternatively, in addition to the at least one detection unit 24 . 29 another sensor 17 . 15 to be used for surveillance. The at least one registration unit 24 . 25 or the at least one detection unit 24 . 25 and the other sensor 17 . 15 are advantageously associated with an evaluation or control device, wherein the evaluation or control device in case of improper sheet deposition a machine function, in particular a machine stop, initiated. The evaluation or control device can also be integrated in the machine control. Further, the evaluation or control device can be in operative connection with at least one actuator to sheet position correction.

At the leading edge stop level 12.2 upstream point 17.2 . 15.2 the position of at least one sheet is preferred 7 concerning the further stop 12 . 14 . 16 supervised. Preferred is a sensor 17 . 15 to monitor the position of at least one arc 7 concerning the further stop 16 . 14 set up, trained and / or arranged. Will be at the point to be monitored 17.2 . 15.2 detects that there is an improper sheet deposition, a machine function, in particular a machine stop, can be initiated. The machine function can be initiated depending on a processed substrate. Alternatively or additionally, in the event of an improper sheet deposition, a sheet position correction can be undertaken.

The leading edge stop plane 12.2 upstream point 17.2 . 15.2 can be inside or outside the stack floor plan 9.1 lie. The stack floor plan 9.1 can be described by the four vertical edges intersecting the sheet edges or the levels of the stack side surfaces. Next lies the point to be monitored 17.2 . 15.2 preferably between a gripper carriage track of the sheet conveying system and the surface, in particular the last properly filed sheet 7 , the delivery pile 9 , The point to be monitored 17.2 . 15.2 may, for example, in the range and / or height of the attacks 12 . 16 . 14 of the delivery pile 9 are located.

To monitor the at least one of the leading edge stop plane 12.2 upstream point 17.2 . 15.2 is preferred by the at least one sensor 17 . 15 a sensor beam 17.1 . 15.1 which generates the point 17.2 . 15.2 , cuts. The sensor beam 17.1 . 15.1 can the stack floor plan 9.1 or a stop level 12.2 . 14.2 . 16.2 the attacks 12 . 14 . 16 cut or approximately vertically aligned a supernatant of an arc 7 at a stop 12 . 14 . 16 detect. Particularly preferably, the sensor beam includes 17.1 . 15.1 a vertical directional component, in particular in the direction of the gripper carriage track. The at least one sensor 17 . 15 is preferred as a non-contact sensor 17 . 15 executed and can be used as an ultrasonic sensor 17 . 15 or as an optical sensor 17 . 15 be educated. The at least one sensor 17 . 15 is particularly preferred in the sheet transport direction 39 in front of the leading edge stop plane 12.2 arranged.

Preferably, the at least one of the leading edge stopper plane 12.2 upstream point 17.2 . 15.2 monitored without contact. In particular, the at least one sensor 17 . 15 therefore for non-contact monitoring of the location of at least one arc 7 concerning the further stop 12 . 14 . 16 educated. Particularly preferred is the at least one sensor 17 . 15 for non-contact monitoring of the position of individual sheets 7 a bow sequence with respect to the further stop 12 . 14 . 16 educated. But are preferred several, different edges of the delivery pile 9 assigned points 17.2 . 15.2 supervised. Further education is or are several sensors 17 . 15 for monitoring at least two spaced-apart points 17.2 . 15.2 educated. In this case, several points to be monitored are preferred 17.2 . 15.2 different sides of the delivery pile 9 associated with two points to be monitored 17.2 opposite sides of the delivery stack 9 can be assigned. Next, another point to be monitored 15.2 a further edge, in particular a trailing edge, of the delivery stack 9 be assigned.

Preferably, the at least one sensor 17 . 15 for monitoring the leading edge stop plane 12.2 upstream point 17.2 . 15.2 spaced from the stop surface 16.1 . 14.1 of the further stop 16 . 14 arranged. Further education is the at least one sensor 17 . 15 spaced from the further stop 16 . 14 arranged. The at least one point to be monitored 17.2 . 15.2 can be moved to a sheet format when the size of the delivery is changed. For this purpose, the at least one sensor 17 . 15 be added to the format setting displaced. For example, the at least one sensor 17 a side edge stop 16 , in particular a Seitengeradstoßer 16 be assigned. Alternatively or additionally, a sensor 15 a rear area, in particular a trailing edge stop 14 , the delivery pile 9 be assigned. In particular, a sensor 15 a format adjustable brake station of a brake unit 13 be assigned. Particularly preferred are at least two sensors 15 , especially in the lateral areas, trailing edge stops 14 assigned.

During sheet travel, at least one of the leading edge fence level may be at 12.2 upstream point 17.2 . 15.2 be monitored whether there is a proper bow sequence or if there is a faulty sheet position. It may be of the at least one detection unit 24 . 29 and / or the at least one sensor 17 . 15 a sensor signal is emitted if a proper sheet deposition takes place or alternatively if no proper sheet deposition takes place. In particular, the sensor signals of several monitored points 17.2 . 15.2 . 25.4 . 26.4 . 30.4 evaluated together. An improper sheet deposition can be detected, for example, if at least one of the points to be monitored 17.2 . 15.2 . 25.4 . 26.4 . 30.4 , For example, by the evaluation or control device, a faulty sheet position is detected. The monitoring of several, in particular all, points to be monitored 17.2 . 15.2 . 25.4 . 26.4 . 30.4 is particularly preferably at the same time, so that a quick reaction can take place. It can be distinguished, for example, from the evaluation or control device between a false sheet 7.1 , a crook 7.2 and a clamping sheet, which is between two stops 12 . 14 . 16 is trapped. In addition, the machine function is initiated as a function of the detected error case. A machine function may include, for example, a printing of the machine, in particular at the speed of production. A change in the machine speed can also be covered by the machine function.

It becomes a delivery for a sheet processing machine with a sheet conveying system for conveying sheets 7 over a delivery pile 9 provided, with at least one stop 12 . 14 . 16 to align the delivery stack 9 is provided, wherein at least one sensor 15 . 17 . 25 . 26 . 30 for monitoring the position of at least one arc 7 concerning the stop 12 . 14 . 16 is provided, and wherein the sensor 15 . 17 . 25 . 26 . 30 to monitor a point 17.2 . 15.2 inside the stack floor plan 9.1 is trained. The stack floor plan 9.1 can be described by the four vertical edges intersecting the sheet edges or the levels of the stack side surfaces.

The sensor is preferred 15 . 17 . 25 . 26 . 30 for detecting the arc fall of one or more consecutive falling bow 7 inside the stack floor plan 9.1 set up, trained and / or arranged. In particular, the sensor 17 for monitoring the position of the sheet side edges with respect to a side edge stop 16 , in particular a Seitengeradstoßers 16 , intended. At least two with respect to the delivery stack are particularly preferred 9 Sensors arranged on opposite sides 17 designed for joint detection of the bow case.

The sensor 15 . 17 for example, a stack floor plan 9.1 or a stop level 12.2 . 14.2 . 16.2 the attacks 12 . 14 . 16 cutting sensor beam 15.1 . 17.1 generating arranged. Particularly preferred is the sensor beam 17.1 . 15.1 a stop level 12.2 . 14.2 . 16.2 below a common cutting line 28 from gripper carriage level 8.1 and stop level 12.2 . 14.2 . 16.2 arranged intersecting. The sensor beam 15.1 . 17.1 thus cuts the vertical stack side surface below the cut line 28 and above the forming stack surface. The gripper carriage level 8.1 can do this through the immediately above the delivery pile 9 in the sheet transport direction 39 extending gripper carriage track or of itself directly above the delivery pile 9 horizontally in the direction of sheet transport 39 moving gripper serves the gripper carriage 8th be stretched. Through the one stop plane 12.2 . 14.2 . 16.2 cutting sensor beam 15.1 . 17.1 be bow 7 detects which already has a drop distance between the stops 12 . 14 . 16 have covered. This can especially between the attacks 12 . 14 . 16 stuck bow 7 , So, for example, clamping sheets are detected, which are otherwise not detectable.

From the at least one sensor 15 . 17 a sensor signal can be output if a falling arc 7 is detected or detected. Preference is given to several, in particular directly successive falling bow 7 detected. Further education is the sensor 15 . 17 . 25 . 26 . 30 is in communication with an evaluation or control device, which data on the sheet transport available. The sensor signals of the sensor 15 . 17 are preferably compared by the evaluation or control device with setpoint values, wherein a machine function, in particular a machine stop, is initiated when tolerance limits are exceeded.

The 12 shows a delivery pile 9 in the sheet transport direction 39 seen with sensor-monitored side edge stops 16 , The side edge stops 16 are preferred here as against the stack side edges of the delivery stack 9 movable side-wheel bumpers 16 executed. The side edge stops 16 each have one the stacking area of the delivery pile 9 facing stop surface 16.1 on, each a vertical side edge stop plane 16.2 spans. The side edge stop planes 16.2 are preferably perpendicular and parallel to the sheet transport direction 39 aligned clamped.

At least one preferred to all two side edge stops 16 is a side-edge sensor 17 assigned. A side-edge sensor 17 can, for example, on a Seitengeradstoßer 16 be arranged without having to perform shaking movements. A side-edge sensor 17 generates a sensor beam 17.1 that in between the side edge stops 16 is located area. In particular, the sensor beam 17.1 in the stack floor plan 9.1 of the delivery pile 9 directed. In addition to the in the stack floor plan 9.1 directed component, the sensor beam 17.1 also prefers a vertical component in the direction of the over the delivery stack 9 circulating gripper carriage 8th on. Preference is given to falling bow 7 through both side-edge sensors 17 in a respective side edge monitoring area 16.3 detected or detected. The side edge monitoring area 16.3 For example, from the side edge stop plane 16.2 a side edge stop 16 until about the middle of the delivery pile 9 be formed. Preferably, the side edge monitoring area is located 16.3 adjacent to the side edge stop plane 16.2 and can be up to 150 mm in the stack floor plan 9.1 pass.

The at least one side edge sensor 17 stands with an evaluation device or a control device, such as the machine control, in conjunction. By means of the evaluation or control device are from the side edge sensor 17 supplied signals as actual values compared with predetermined target values. In particular, both side-edge sensors become 17 together with respect to a respective falling bow 7 evaluated. If the tolerance value is exceeded, a corresponding machine function can be initiated. In particular, it is detected as a storage error when the side edge sensor 17 the bow 7 does not recognize at predetermined times and / or if the angular difference (in particular of the machine angle as a condition parameter of the printing machine for a dynamic sheet storage monitoring) or the Distance between two consecutive adjacent arches 7 too big or too small. Preferably, the sensor signals can be interpreted as a bow 7 which hangs firmly in the shaft (clamp arch) or as a bow 7 which is axially offset over one of the side edge stops 16 located (false arch 7.1 or oblique arch 7.2 ). In this case, it is particularly advantageous that the sheet blocking the deposit shaft is also advantageous 7 (Clamping sheet) can be detected. Particularly preferred are both bow 7 detected outside the stack floor plan 9.1 lie (false arch 7.1 or oblique arch 7.2 ), as well as bow 7 , which block within the storage shaft (clamping arch). In a further development, suitable measures, in particular according to the detected error case, can be initiated, which avoid a breakdown. An improved sheet drop control is thereby created.

It becomes a delivery for a sheet processing machine with a sheet conveying system for conveying sheets 7 over a delivery pile 9 provided, with stops 12 . 14 . 16 to align the delivery stack 9 are provided, wherein at least one sensor 15 . 17 . 25 . 26 . 30 is provided for monitoring the sheet storage and wherein a sensor 15 . 17 is formed such that with this at least two successive falling bow 7 are detectable. At least two sensors are preferred 15 . 17 spaced from one another and designed such that with this simultaneously falling bow 7 are detectable. For example, at least two sensors 15 spaced from each other a stack trailing edge, in particular trailing edge stops 14 , and / or a stack side edge, in particular side edge stops 16 be assigned.

Preferably, the at least one sensor 15 . 17 as a non-contact sensor 15 . 17 , in particular as an optical sensor or as a laser sensor formed. With the non-contact sensor 15 . 17 become the sheets that fall consecutively on the sheet storage 7 detected. With the sensor 15 . 17 become the successive falling bow 7 preferably detected individually, wherein the sensor 15 . 17 outputs a sensor signal when a falling arc 7 is detected. Further, the Hinterkantensensor 15 be executed with background suppression. Further, a minimum and a maximum sample location, in particular the monitored point 15.2 . 17.2 be made changeable or adjustable.

Next, the at least one sensor 15 . 17 . 25 . 26 . 30 are connected to an evaluation or control device, which data on the sheet transport available. This data can be entered or automatically generated. The evaluation or control device has in particular a memory in which characteristic data such as desired values or tolerance values, for example as job-dependent curves, are stored. By the evaluation or control device, a comparison of the sensor signals with data on the sheet transport can take place, wherein upon detection of one or more erroneously falling bow 7 a machine function, in particular a machine stop, can be initiated.

In particular, at predetermined times a control by the sensor 17 . 15 occur at times in which the desired position of the bow 7 Exactly known and / or constructive determinable: For example, at a first time shortly after the gripper carriage passage with a bow 7 a sensor query carried out, wherein a sensor signal means that a good sheet, so an error-free falling bow 7 , is present. For example, a sensor query can be carried out at a second time just before gripper carriage passage, wherein a sensor signal means that a faulty filed sheet, such as a false sheet 7.1 , is present. This should be the sensor 17 . 15 with respect to the sheet transport direction 39 in the area in front of the gripper opening of the gripper carriage 8th be positioned.

The 13 shows a plan view of a delivery stack 9 in the delivery of a sheet-processing machine, in particular a sheet-fed press, for example, as described above. In the delivery are leading edge stops 12 , Side edge stops 16 and trailing edge stops 14 intended. The leading edge stops 12 clamp a leading edge stop plane 12.2 up in the sheet transport direction 39 at least one sensor 15 . 17 for monitoring the sheet storage and / or the position of the sheet 7 concerning at least one stop 12 . 14 . 16 is upstream. Shown are back edge sensors 15 that the sheet storage or the location of the bow 7 concerning the trailing edge stops 14 and / or the side edge stops 16 monitor. The trail edge sensors 15 are the trailing edge stops 14 assigned adjacent and as non-contact sensors, in particular optical sensors, for example as a CCD sensor, or laser sensors executed. These have a sufficiently good response. In particular, at least two trail edge sensors 15 spaced from each other associated with the lateral areas. Further education takes place a format adjustment of the Hinterkantensensoren 15 so that they can always be directed to the lateral areas of the sheet trailing edge. Due to the lateral arrangement of the rear edge sensors 15 can both the position of the sheet trailing edges with respect to the trailing edge stops 14 as well as indirectly the position of the sheet side edges with respect to the side edge stops 16 be monitored.

Particularly preferred is a rear edge sensor 15 a format adjustable brake station of the brake unit 13 assigned, allowing a positioning of the rear edge sensors 15 can be done on the current sheet format. Due to the format setting of the at least one brake element, for example a suction belt 13.1 , carrying brake station is an automatic format adjustment of the connected Hinterkantensensors 15 , But there are also other braking stations with rear edge sensors 15 be provided so that the accuracy of the monitoring of the sheet trailing edges can be improved over the format width. Particularly preferred is a rear edge sensor at each brake station 15 attached, so that an evaluation is always secured in the vulnerable lateral or outer format range.

The rear edge sensor is preferred 15 a sensor beam 15.1 generating formed and arranged so that the sheet fall area can be monitored. It is preferred every single falling bow 7 detected. In case of a faulty filed sheet 7 for example one on a side edge stop 16 and / or a suction belt 13.1 filed false bows 7.2 , an improper sheet order and thus improper sheet storage will be detected. An improper sheet deposition classified as safety-relevant can then lead to initiation of a machine function, in particular to a machine stop, as already described above.

The 14 shows a delivery pile 9 from the side with one in front of the delivery pile 9 arranged brake unit 13 , The brake unit 13 contains here a braking station with circumferentially driven suction belt 13.1 or brake band around the respective released bow 7 from machine speed to storage speed. The brake station and other braking stations, not shown, are at a transversely to the sheet transport direction 39 arranged traverse 14 in particular movably attached. Preferably, a format-dependent adjustment of the braking stations on the arc width on the crossbar 14 , The traverse 14 can be used as a rear edge stop 14 the sheet trailing edges of the sheets to be deposited 7 align. Further education can be the Traverse 14 separate rear edge stops 14 be assigned in particular movable, where the sheet trailing edges of the sheets to be deposited 7 align. The trailing edge stops 14 can, for example, in a sheet transport direction 39 oriented swivel axis swiveling the traverse 14 be assigned. The traverse 14 and / or the trailing edge stops 14 each have one the stacking area of the delivery pile 9 facing stop surface 14.1 on, which is a stop level 14.2 span. The stop level 14.2 is preferably perpendicular and transverse to the sheet transport direction 39 aligned clamped.

The or the rear edge attacks 14 is the at least one rear edge sensor 15 to detect the falling bow 7 assigned. The trail edge sensor 15 for example, above the crossbar 14 be arranged. The rear edge sensor is preferred 15 from the stop level 14.2 , So from the falling perpendicular bow trailing edges, at a distance of 0 to 150 mm, but preferably 10 to 50 mm, arranged. For example, by the rear edge sensor 15 the sheet trailing edge is detected at a height of 20 to 40 mm above the stack surface. The at least one rear edge sensor 15 can the traverse 14 be assigned fixed or movable. To improve the quality of the measurement result, the or more Hinterkantensensoren 15 be designed rotatable and / or pivotable. The back edge sensor is preferred 15 but assigned to a braking station and thus adjusted with this. Further, the Hinterkantensensor 15 adjustable in height, for example, with the level control of the stacking surface to be performed. The from the rear edge sensor 15 generated sensor beam 15.1 may have an at least approximately horizontal directed in the direction of the sheet drop area extension.

Shown is the sensor beam 15.1 with a downward component. Next is also the inclination of the sensor beam 15.1 be formed changeable or adjustable to the horizontal.

The following in Bogenbogenbereich falling bow 7 go through the sensor beam 15.1 and are at a supervised point 15.2 by means of a receiver or pick-up of the rear edge sensor 15 detected. The from the rear edge sensor 15 monitored point 15.2 can be within the sheet drop area or at the sheet trailing edge. In particular, the sheet trailing edge can be recognized very well, for example as a line from the optical sensor or laser sensor. The trail edge sensor 15 is preferably designed such that in each case individual sheets 7 a succession of consecutive falling bows 7 can be detected. The one or more edge sensors 15 are connected to an evaluation or control device, such as the machine control in connection. By means of the evaluation or control device are from the rear edge sensor 15 transmitted signals compared with predetermined target values. For example, at least two, in particular the outer, or all Hinterkantensensoren 15 together with respect to a single respective falling arc 7 evaluated. If the tolerance value is exceeded, a corresponding machine function can be initiated. In particular, as a filing error detected when a rear edge sensor 15 the bow 7 does not recognize at predetermined times and / or if the angular difference (in particular of the machine angle as a condition parameter of the printing machine for a dynamic sheet storage monitoring) or the distance between two consecutively falling immediately adjacent sheet 7 too big or too small. Preferably, the sensor signals can be interpreted as a bow 7 which hangs firmly in the shaft (clamp arch) or as a bow 7 which is axially offset over one of the side edge stops 16 and / or trailing edge stops 14 located (false arch 7.1 or oblique arch 7.2 ). Further education, it is provided over the sheet width at least three Hinterkantensensoren 15 and / or preferably on both sides of the sheet two in the sheet fall direction successively arranged rear edge sensors 15 use. This creates the possibility of the falling speed and / or the surface profile of the falling bow 7 to investigate. From these results, the fall rate influencing elements, such as fans of the blower frame, blowpipes, etc., targeted, controlled and the sheet fall can be selectively changed. Furthermore, so that color deposits (pimples) can be avoided or the retraction movement of an auxiliary stacking table (eg., Non-stop roller blind 41 ) are easily executed in the stacking area. In this case, existing sensors, such as sensors for determining the stack height, the stack level, etc., can be connected to the evaluation or control device, and their signals are integrated into the results. Through targeted sensor evaluation special quality problems, such as cornering, for example at the sheet trailing edge, can be detected. By increasing the blowing pressure of the corner blowers then the quality defect can be eliminated. The elimination of defects can be done in particular by notification to the printer or automatically by the machine. Such a sensor arrangement can likewise be used on an arc side edge, so that the possibility of influencing the sheet deposition can be further improved. A sheet position sensor can also be above the delivery stack 9 be arranged to determine the surface profile of the falling bow 7 ,

The 15 shows further education another sensor 40 below the trail edge sensor 15 for example, as a stacking gap sensor 40 for controlling a non-stop roller blind 41 is provided in an arc gap. The of this stacking gap sensor 40 supplied sensor signals or data can in particular by the evaluation or control device, such as the machine control, with the sensor signals or data of the or the edge sensors 15 be linked. By the evaluation or control device can be made a common evaluation of the sensor signals or data. As a result of the evaluation or control device, a check, for example, can be made for plausibility. Furthermore, the achievable accuracy of the position determination of sheet edges by the plurality of sensors 15 . 40 increase. The further sensors can be used to test whether a retraction of the non-stop roller blinds 41 can be done easily. Further, in the detection of the gap between two successive falling bow 7 are found to be bow modifiers, such as the non-stop roller blind 41 , Bogengreifer, Bogensauger, Bogenbläser defined in the determined gap in the stack floor plan 9.1 to move in. Preferably, there is the possibility of realizing the cheapest Einfahrzeitpunkt using appropriate software. Further development could also be a sheet counting by the at least one sensor 15 . 40 be performed.

The evaluation of the sensor signals can be carried out by the evaluation or control device, for example, such that angle values (in particular of the machine angle as the state parameter of the printing machine for dynamic sheet storage monitoring) are determined if a respective sheet 7 a sensor beam 15.1 a trail edge sensor 15 happens. In the evaluation or control device, target values can be stored, for example, as angle values, which can be entered, automatically generated or learned. These target values can be stored depending on the processing speed, sheet format, blowing pressure of the blow frame, etc. Differs from the evaluation or control device from that of the rear edge sensor 15 generated sensor signal determined angle values from the target value, possibly taking into account tolerances, from, can on a faulty filed sheet 7 (Excess sheet, false sheet 7.1 , Oblique arch 7.2 , Clamping sheet) are closed. When bow 7 not properly between the side edge stops 16 or lateral bumpers 16 the bow trailing edges pass the sensor beams 15.1 the trail edge sensors 15 especially at different machine angles.

Through additional sensors 15 . 17 . 25 . 26 . 30 and / or further evaluation of sensor signals, the error case can be limited or determined. Suitable machine functions can be initiated as a function of the determined error case. Also from the stacker sensor 40 supplied sensor signals, the sheet position can be determined, which can be decided after their evaluation, whether the non-stop roller blind 41 can enter unhindered in the bow fall area. This prevents in particular that the non-stop roller blind 41 when driving against a sheet trailing edge abuts. Further education can all sensors 15 . 17 . 25 . 26 . 30 To improve the function regularly be cleaned in particular by blast air. This can be done individually or regularly, for example, in a stack change or actuation of the delivery flap.

The 16 shows a stack floor plan 9.1 a delivery pile 9 with possible surveillance areas. In this case, arranged in the display not shown sensors 25 . 26 . 30 a leading edge monitoring area 12.3 monitor which one through the leading edge stop surfaces 12.1 the leading edge stops 12 clamped leading edge stop level 12.2 in the sheet transport direction 39 is downstream. At the same time, side-edge sensors can be used 17 Mullion monitoring areas 16.3 monitor one another through each side edge stop surfaces 16.1 the side edge stops 16 clamped side edge stop plane 16.2 in the direction of the stack floor plan 9.1 extend. Alternatively or additionally, the areas outside the stack floor plan can also be used 9.1 on erroneously filed sheets 7 be monitored. Alternatively or additionally, can be at the same time Hinterkantensensoren 15 a trailing edge monitoring area 14.3 monitor which one through the trailing edge stop surfaces 14.1 the trailing edge stops 14 spanned trailing edge stop plane 14.2 in the sheet transport direction 39 is downstream.

LIST OF REFERENCE NUMBERS

1

 pressure cylinder

2

 drive sprocket

3

 nose wheel

4

 wave

5

 wave

6

 Chain

7

 bow

7.1

 false arch

7.2

 crooked bow

8th

 gripper carriages

8.1

 Gripper carriages level

9

 delivery pile

9.1

 Stack layout

10

 stacking plate

11

 lifting chain

12

 Leading-edge stop

12.1

 Leading-edge stop surface

12.2

 Leading-edge stop level

12.3

 Leading edge surveillance area

13

 brake unit

13.1

 suction belt

14

 Rear edge stop

14.1

 Bute stopping surface

14.2

 Bute stop level

14.3

 Bute monitoring area

15

 Trailing edge sensor

15.1

 sensor beam

15.2

 monitored point

16

 Side edge stop, side ratchet

16.1

 Side edge stop surface

16.2

 Side edge stop level

16.3

 Mullion monitoring area

17

 Side edge sensor

17.1

 sensor beam

17.2

 monitored point

18

 sheet guide plate

19

 dryer

20

 pollination unit

22

 chain guide

23

 holder

24

 acquisition unit

25

 scanning sensor

25.1

 Sensor / receiver

25.2

 reflector

25.3

 sensor beam

25.4

 monitored point

26

 scanning sensor

26.1

 Sensor / receiver

26.2

 reflector

26.3

 sensor beam

26.4

 monitored point

27

 minimal sheet size

28

 Line of intersection of gripper carriage plane and stop plane

29

 further registration unit

30

 additional scanning sensor

30.1

 Transmitter-receiver

30.2

 reflector

30.3

 sensor beam

30.4

 monitored point

31

 cleaning unit

32

 nozzle unit

32.1

 first exit opening

32.2

 second exit opening

33

 blown air

34

 air jet

35

 air jet

36

 lattice structure

37

 Sample sheets Finger

38

 machine center

39

 Sheet transport direction

40

 Stack gap sensor

41

 Non-stop Rollo

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 102006040679 A1 [0002]
• DE 10106669 A1 [0005]
• DE 19819688 A1 [0006]
• DE 102004021808 A1 [0007]
• EP 1842817 A2 [0008]

Claims (10)

Delivery for a sheet-processing machine with a sheet conveying system for conveying and releasing sheets ( 7 ) over a delivery pile ( 9 ), whereby at least one stop ( 12 . 14 . 16 ) for aligning the falling and the delivery stacks ( 9 ) forming sheets ( 7 ) and at least one sensor ( 15 . 17 . 25 . 26 . 30 ) is provided for monitoring the sheet storage, characterized in that one with the sensor ( 15 . 17 . 25 . 26 . 30 ) and sensor signals of the sensor ( 15 . 17 ) evaluating evaluation or control device is provided, the sensor signal of a respective arc ( 7 ) with respect to a condition parameter of the printing press and / or with respect to a sensor signal of another sheet ( 7 ) evaluates. Display at least according to the preceding claim, characterized in that the sensor ( 15 . 17 . 25 . 26 . 30 ) is designed as a non-contact sensor, in particular as an optical sensor or as a laser sensor. Display according to at least one of the preceding claims, characterized in that at least two sensors ( 15 . 17 ) spaced from each other and are formed such that with these simultaneously falling bow ( 7 ) are detectable. Display according to at least one of the preceding claims, characterized in that at least two sensors ( 15 ) spaced from each other a stack trailing edge, in particular trailing edge stops ( 14 ), assigned. Method for depositing sheets ( 7 ) in the delivery of a sheet-processing machine, wherein at least one stop ( 12 . 14 . 16 ) and a delivery pile ( 9 ) forming sheets ( 7 ) and wherein at least one sensor signal generating sensor ( 15 . 17 . 25 . 26 . 30 ) monitors the sheet storage, characterized in that the sensor signal of a respective sheet ( 7 ) with respect to a condition parameter of the printing press and / or with respect to a sensor signal of another sheet ( 7 ) is evaluated. Method at least according to the preceding method claim, characterized in that the state parameter of the printing machine is the machine angle and / or the sensor signal of another sheet ( 7 ) a sensor signal of a leading or a subsequent arc ( 7 ). Method according to at least one of the preceding method claims, characterized in that with the sensor ( 15 . 17 ) successive falling sheets ( 7 ) can be detected individually. Method according to at least one of the preceding method claims, characterized in that the sensor ( 15 . 17 ) outputs a sensor signal when a falling arc ( 7 ) is detected. Method according to at least one of the preceding method claims, characterized in that the sensor ( 15 . 17 ) is connected to an evaluation or control device which connects the sensor signal of the sensor ( 15 . 17 ) evaluates under consideration of tolerance values. Method according to at least one of the preceding method claims, characterized in that upon detection of a faulty falling or fallen arc ( 7 ) a machine function, in particular a machine stop, is initiated.

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