DE102016206685A1 - Display of a sheet-processing machine with a brake stations-the sheet brake and method for depositing sheets - Google Patents

Abstract

The invention relates to a display of a sheet-processing machine with a brake stations (6) having sheet brake (5), said sheet (1) of conveyor systems in the direction of a delivery stack (2) on the brake stations (6) are transportable and wherein a blast air device is provided with the at least one blown air jet is ejected with a component directed in the direction of sheet travel (BLR) and method for depositing sheets in displays of sheet-processing machines with a sheet-brake having braking stations. The invention has for its object to provide an alternative delivery for a sheet-processing machine, in particular sheet-fed press. In particular, a störunanfälligere sheet braking or sheet storage is to be created so that the storage process of sheet in the delivery of a sheet-processing machine can be further improved. According to the invention, this object is achieved in that the blast air device is assigned to a traverse (18) arranged over the machine width and / or at least one braking station (6).

Description

The invention relates to displays of sheet-processing machines with a braking station having sheet brake and method for storing sheets in displays of sheet-processing machines with a braking stations having sheet brake.

At high machine speeds there is a risk that the leading edge of the follower sheet located in the gripper carriage touches the previous sheet located in the falling process at the trailing edge. Overwind sheets are the result. If there is no collision of the sheet edges remains the disadvantage of too small a distance of the arc surfaces when the follower sheet moves over the top stacking sheet. This can lead to a flat sheet contact, which ultimately causes smearing.

Corner blowers can be used, which permanently blow blowing air between the upper stacking sheet and the sheet still in the gripper carriage. Disadvantageously, the sheet located in the gripper carriage is blown upwards. The device does not have a flat surface. Air is permanently embedded, slowing down and disturbing the fall process.

From the DD - PS 111 870 a method and a device for accelerated deposition of sheet-shaped materials is known, wherein below the sheet to be deposited, an additional blowing system is provided for bringing about an aerodynamic vacuum condition between the stack and the sheet to be deposited.

From the DE 198 16 314 A1 a device for depositing arc is known in which between the spaced-apart suction rings blowing elements are provided which extend in the vertical direction over a range. A disadvantage of these solutions is that permanent air is imparted, which can slow down and worry the fall process. Furthermore, the blowing elements can hinder the format setting of the brake elements or lead to bow damage to falling bow.

The invention is therefore an object of the invention to provide an alternative delivery for a sheet-processing machine, in particular sheet-fed printing machine. In particular, a störunanfälligere sheet braking or sheet storage is to be created so that the storage process of sheet in the delivery of a sheet-processing machine can be further improved.

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

The invention has the advantage that an alternative delivery for a sheet-processing machine, in particular sheet-fed printing machine, is provided. In particular, a less annoying sheet braking or sheet deposition is created, so that the storage process of sheets in the delivery of a sheet-processing machine is further improved.

A delivery of a sheet-processing machine in one embodiment includes a traverse arranged above the machine width, for example a traverse carrying trailing edge stops or an additional traverse. The traverse can be arranged between side walls of the display or extend partially or completely between them. The Traverse is associated with a Blaslufteinrichtung, the traverse is preferably facing the delivery stack and particularly preferably associated with the delivery stack immediately adjacent. The Traverse is in particular with at least one Blasluftquelle in pneumatic communication and preferably receives at least one pneumatic channel. The blast air device is associated in particular with the surface and / or the side surface of the crossmember facing the delivery stack.

According to one embodiment, at least one blowing air nozzle can be arranged over the machine width. It can be used a slot nozzle. Preferably, however, several arranged over the machine width Blasluftdüsen are provided, which are assigned in particular the reaching across the machine width traverse. A distance between nozzles to each other can be uniform, preferably constant, or even different sizes. The air outlet openings may alternatively be designed as bores. In a further embodiment, it is provided that the nozzles or the holes inclined and / or arranged differently inclined. Developing the inclination of the blow holes or nozzles can be made variable.

The blast air device preferably has a plurality of blower nozzles integrated in the surface or in the side surface facing the delivery stack. Preferably, air nozzles are evenly distributed over the width of the machine integrated in the traverse. The traverse, in particular Hinterkantentraverse, associated Blasluftdüsen can be oriented, for example, as in sheet travel direction Schlitzblasdüsen be formed. The blown air can emerge, at least over the current format width, with a component directed in particular in the direction of sheet travel, in particular horizontally. For example, the blown air can escape at least approximately horizontally. The blast air device may generate many individual blast air jets and / or also generate one or more blast air fans.

In one embodiment, blowing air is introduced at the trailing edge between the upper stacking sheet and the subsequent sheet located in the gripper carriage or located just in the falling process. Preferably, the blown air generated by the blower device can be controlled or regulated. The blast air device has, for example, an air control element. Particularly preferably, the exiting blown air is clocked. The blown air can be changed or changed depending on machine parameters such as machine speed, sheet material, machine angle, color assignment, sheet format, grammage and / or sheet case image. In particular, the adaptation of the blowing intensity and / or blowing time to the acceleration angle, the acceleration height, the sheet format and / or the color assignment can be provided. The blown air is preferably controlled or clocked introduced so that the bow drop motion improves. In a further embodiment, the blast air device may have a further air control element for separate control of Blasluftdüsen.

Preferably, the generation of cycled blown air by an air control element, which is preferably arranged very close to the consumer. As an air control element in particular one or two rotary valves can be used, which can be arranged for example laterally in particular on signs of the sheet brake. A rotary valve can be driven for example by a single-turn shaft. Preferably, blowing occurs in the region of a braking station or from the sheet brake associated traverse, in particular trailing edge traverse, at least approximately in the direction of movement so in sheet travel direction, wherein the generation of clocked blast air can be done in the rotary valve of the sheet brake. In a preferred embodiment, additional rotary valves which are responsible for the pulsed blown air are driven by the already existing single-turn shaft of the sheet brake. The installation of the further rotary valve may be provided, for example, stationary on the side plates of the sheet brake. In a corresponding embodiment of an air control element, in particular a rotary valve rotor, preferably a gradual increase and / or decrease in the blowing intensity can be achieved. Also, the connection point and / or shutdown can be adjusted or changed by the at least one air control element, in particular one or two rotary valves, just as a fine adjustment can be made.

The blowing intensity at different blowing air nozzles can also be different. For example, the blow intensity outside the sheet format can be reduced or suspended. It can further be provided to increase the blowing intensity in the region of a braking station, in particular in the region of a braking element, for example a brake band. By increasing the blowing intensity in this axial region, the aerodynamic paradox can be increased and thus the lowering movement of the arc in this area can be increased. Thus, in particular the position of the sheet trailing edge can be adjusted during the falling process of a flatness. This is particularly advantageous in between two brake stations severely sagging sheet, for example, in lightweight substrates. It is also possible to partially or completely reduce the blowing air or to minimize or deactivate it in some areas. It may be provided to close the Blasluftdüsen or Blasluftbohrungen. For example, the air nozzles can be closed with valves or mechanical covers. In particular, it can be provided to arrange a storage element in front of one or each nozzle. It can be advantageously provided an end-side operation of the storage elements. The storage elements can be remote-controlled or individually actuated and / or released, for example, from the stack side. Alternatively or additionally, also pivotable nozzles can be provided on a traverse, in particular a trailing edge bearing traverse, or an additional strip.

In a further embodiment, the traverse, in particular Hinterkantentraverse be performed in two parts. For example, the traverse, in particular Hinterkantentraverse be divided into basic crossbar and interchangeable air spreader. The air cross-piece may preferably include the air channels and / or the air outlet holes or nozzles. In particular, it may be provided to change the effective height of the blown air, in particular as a function of the parameter, for example depending on the material, via a height-adjustable blown air outlet pipe. The connection of the pulsed compressed air in a corresponding amount is preferably also parameter-dependent, in particular depending on the machine speed and / or the material, in particular the grammage of the sheets to be deposited. In particular, according to an embodiment, depending on the material, a number of nozzles can be activated and / or displaced. In particular, a blowpipe can be used, which adapts to the contour of the stack.

In a further embodiment, a plurality of channels may be provided in the traverse, which can be supplied separately with blown air. In particular, two supply channels in the traverse, in particular Hinterkantentraverse be integrated, which can be supplied on both sides with clocked blowing air. The path between a rotary valve and the Traverse, in particular Hinterkantentraverse is preferably very small. In particular, it can be achieved that a shift of the effect of the blowing air to the desired rotation angle of the machine over the entire speed range minimally fails. In an embodiment of the traverse with two or more blast air chambers, it is also possible to eject blast air in the direction of movement and in another direction. The blowing air applied to the traverse can in particular also be used as supporting air with a vertical outlet component and / or for temperature control. If the end face of the sheet brake associated traverse, in particular Hinterkantentraverse is blown, there is also the further education the opportunity to direct the blowing air through the sheet brake, that a tempering effect, in particular a cooling effect arises. For example, a cooling of the machine or brake elements, in particular the brake bands can be achieved.

The existing in the or the traverse or the sheet brake blow holes or nozzles can also be designed as Hubbläser. For example, blowers, in particular blown air nozzles, can be designed to be displaceable in such a way that they can move into the stacking area. For example, pneumatic cylinders can be used. In particular, an exclusively linear or linear and / or joint movement of the blast air outlet openings into the stacked floor plan takes place and / or out again. For example, a movement of the blast air nozzles takes place exclusively in and against the sheet travel direction. Fast sheet storage can be guaranteed. Advantageously, an improved propagation of the blowing jet between the sheets can thus be achieved. At the same time, fans located in the stack area can also be used as support elements.

The released by a gripper carriage and the sheet brake sheet is advantageously transported by the simultaneous and / or short-term blowing action of the Blaslufteinrichtung at high speed in the direction of the surface of the stack formed from deposited sheet, so that the subsequent sheet can easily pass the trailing edge of the falling sheet. Due to the blowing air, the falling process is advantageously carried out not only at the edge of the sheet but also flat over the middle of the sheet. The fact that the blast air outlet openings can be arranged over the entire format width, the bow case is approximately parallel. Further development can be dispensed with corner blower and / or a blowing frame acting over the stack can be significantly simplified and / or reduced.

In a further embodiment, it is provided to arrange at least one Blasluftdüse the Blaslufteinrichtung in the range of at least one brake station of the sheet brake. For example, the blown air nozzle can be arranged in an area in which the braking station is located or in which the braking station is placed or displaced. Preferably, the Blasluftdüse is movably arranged so that it can be adjusted. Particularly preferably, a displacement of the blown air nozzle takes place together with the braking station. In particular, it can be provided to directly associate the blower nozzle with the brake station. In this case, the blown air nozzle can be assigned to a surface of the brake station facing the delivery stack. The blown air nozzle may preferably be arranged on a side of a base body facing the delivery stack and / or a suction strip of the brake station or emit a blown air jet. In this case, a fast and effective flatness of the sheet trailing edges can be achieved particularly advantageous. Blasluftdüsen associated with the braking stations counteract the sagging between the brake stations arc profile particularly effective by the particular caused by the braking stations locally highest points are lowered faster by the blast air and thus effectively approximated the intervening example sagging areas. Again, the separate control or regulation, etc. of the Blasluftdüsen be made. In particular, a printing material-dependent and / or machine-speed-dependent control of the blowing air nozzles is provided.

In a further embodiment, it is provided to provide at least two vertically spaced Blasluftdüsen, each of which eject a blast air jet with a directed in the sheet running direction component. In particular, the blowing air nozzles can be controlled separately, so that a two-stage or multi-stage blowing is made possible. Thus, in a first phase, a blown air jet can be ejected through the upper of the blown air nozzles and offset in time, a further blown air jet can be emitted, which preferably underpins the same bend. In particular, the effect of the respective others can be taken into account by separate control of the first and / or of the vertically spaced second or further blown air nozzles. In particular, it may be provided to evaluate the sheet position after the first blown air blast of the upper Blasluftdüse or Blasluftdüsen and according to the blown air blast of the lower Blasluftdüse or Regulate blowing air nozzles. This can be done on an interval, occasion, iterative basis or on each sheet to be filed. In particular, a printing substrate-dependent and / or machine speed-dependent control of the vertically spaced apart Blasluftdüsen is provided. In a preferred embodiment, a plurality of blowing air nozzles are actuated at least over the format width and / or a plurality of vertically spaced blown air nozzles are used at least over the format width. In a particularly preferred embodiment, it is provided to provide blast air nozzles at braking stations and vertically to these spaced apart in the direction of fall more Blasluftdüsen. The vertically spaced Blasluftdüsen can be assigned, for example, a traverse, in particular Hinterkantentraverse.

In another embodiment z. For example, to increase safety, the sheets can be lowered rapidly in the direction of the stack by, in particular, pulsed blowing against the direction of sheet travel, for example from a blowing nozzle or blower strip attached to the front stops. In particular, the sheet leading edges can be brought so quickly to the pile. This significantly reduces the risk of overshoots. It can also side edge stops, especially Seitengeradstoßer be equipped with blow holes or blowing air nozzles. In a further embodiment, a supply of the preferably cycled blown air of several, for example, three or even all four sides of the delivery stack take place.

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

1 : Sheet brake in the display of a sheet-processing machine;

2 : Lateral view of a sheet brake with a braking station;

3 : Perspective view of a sheet brake with brake stations and integrated in the trailing edge cross-air nozzles;

4 : Trailing edge cross-section with blown air holes covered by nozzle plate;

5 : Enlarged side view of a trailing edge crosshead with integrated blower nozzles;

6 : Execution of a blast air device with blowing air nozzles at the braking stations;

7 : Execution of a blast air device with blowing air nozzles at the braking stations and on a crossbeam.

The 1 shows in an embodiment of a section of a display of a sheet-processing machine, in particular a sheet-fed press, here especially a sheet-fed rotary printing machine preferably in aggregate and series construction. The display contains a not further illustrated sheet 1 transporting sheet conveying system, which printed in the printing machine, painted, machined, etc. bow 1 to a delivery pile 2 transported. This sheet conveying system is preferably designed as a chain conveyor system with two delivery chains each guided laterally on the frame of the delivery, between which gripper carriages 3 are arranged. The gripper carriage 3 have Bogenfixiersysteme with which the sheets to be transported 1 be gripped at the front edge. The delivery chains become the gripper carriages 3 on a gripper carriage track in sheet travel direction BLR to above the delivery pile 2 led, where the gripper carriage 3 the bows 1 release for storage. On the Bogenförderweg to the delivery pile 2 is in the delivery below the sheet transport plane at least one mechanical sheet guide, preferably one or more sheet baffles 4 , arranged, which the bow 1 on the way to the delivery pile 2 leads. The sheet guide plate 4 has an at least approximately closed surface for sliding and / or floating guiding the sheet 1 on. The sheet guide plate 4 can be provided with a color-repellent coating. Next nozzle openings for pneumatic guidance of the bow 1 the sheet guiding element, in particular the sheet guide plate 4 be assigned. The printing machine can preferably be designed to be convertible between the modes of recto printing and perfecting. It can between the sheet guide, in particular the sheet guide 4 , and the bow transported above 1 , Especially in the operating mode perfecting, an air cushion are formed.

In the delivery is the delivery pile 2 in bow direction BLR a sheet brake 5 preceded by the sheets to be deposited 1 from the gripper carriage 3 takes over and delays after their release of machine speed on storage speed. After the delay through the sheet brake 5 become the bow 1 aligned on front, rear and / or side edge stops, not shown, and clean on the delivery stack 2 stored. The delivery pile 2 is preferably lowered by a Stapelhubantrieb not shown during the sheet deposition process such that the delivery stack surface at least an approximately constant storage level for the upcoming bow 1 forms. The sheet brake 5 contains at least two braking stations 6 , which are axially, ie transversely to the sheet running direction BLR, displaceable, in particular displaceable, are arranged. But it can also be several such braking stations 6 . For example, at least three or exactly three, four, five or format-dependent also more braking stations 6 , are used. The braking stations 6 are preferably placed on a respective lateral usually unprinted margin of sheet, on pressure-free corridors and / or on sufficiently dried color areas. The displacement can be carried out by hand or preferably by motor. For example, a drive, in particular via a spindle drive, the braking stations 6 relocate. Alternatively, however, one, several or all braking stations 6 be assigned a separate drive. Unnecessary braking stations 6 can be disabled and / or moved out of the sheet format area.

At least one but preferably several or all braking stations 6 can each at least one brake element, preferably a brake band 17 , Record, which is received in particular circumferentially around several axes of rotation. The at least one brake band 17 preferably occurs in pneumatic interaction with the over the sheet brake 5 transported bow 1 , In particular, the bow 1 by suction air in contact with the brake band 17 brought and / or held in a plant, allowing a contact between the brake band 17 and the respective bow 1 arises. The brake band 17 moves at least temporarily at a lower speed compared to the machine speed and delays a respective one from the gripper carriage 3 shared bow 1 corresponding. The brake band 17 can be assigned for this purpose at least one drive, which is the brake band 17 with a constant or variable compared to the machine speed reduced speed drives or decelerates. The brake band is preferred 17 but operated dynamically and / or periodically between at least approximately machine speed and one against this lower storage speed. With several brake elements, in particular brake bands 17 , The drive can also be several or all brake elements, in particular brake bands 17 , drive or delay. Alternatively, each brake element, in particular brake band 17 to be assigned a separate drive. In a further development, the brake element acts, for example a suction ring or the brake band 17 , with a brake element, such as a suction ring or a brake band 17 , another braking station 6 by transverse arrangement with respect to the sheet running direction BLR arrangement on a respective sheet to be deposited 1 ,

The 2 shows an embodiment of a sheet brake 5 with a braking station 6 in side view for a sheet processing machine, for example as described above. The brake station 6 contains here a basic body 7 , Which is arranged on a over the machine width, ie transverse to the sheet running direction BLR, arranged guide beam. The brake station is preferred 6 along here, for example, arranged box-shaped guide beam displaced. The basic body 7 is associated with a preferably with a first drive shaft operatively connected to the first drive element, which is preferred here as standing with a square shaft operatively connected first square shaft drive 8th is trained. About the first drive element, in particular the first square shaft drive 8th , can be a drive of the body 7 associated brake element, here the brake band 17 , respectively. In this case, preferably a common drive of all the braking stations 6 the sheet brake 5 associated brake bands 17 preferably by a rotational movement of the machine shaft arranged over the drive shaft, in particular the square shaft.

The basic body 7 Furthermore, a second drive element, which is preferably in operative connection with a second drive shaft, is assigned here, which preferably acts here as a second square shaft drive operatively connected to a square shaft 9 is trained. About the second drive element, in particular the second square shaft drive 9 , For example, a pneumatic control for the brake element, here the brake band 17 , the braking station 6 be made. In this case, a common pneumatic control of all the braking stations preferably takes place 6 the sheet brake 5 associated brake bands 17 preferably by a rotational movement of the machine shaft arranged over the drive shaft, in particular the square shaft. The brake station 6 is here accordingly axially displaceable along the square shafts and the guide beam, in particular displaceable, for example, as already described above.

The brake station 6 has here at the downstream end of the base body with respect to the sheet running direction BLR 7 a carrier element 13 on which side of the body 7 is preferably arranged protruding. The carrier element 13 For example, it can also be attached to the base body 7 be rotatably mounted drive wheel formed. The drive wheel is here as a hedgehog 15 designed to drive the brake band 17 , The carrier element 13 has an upper connection surface, which is arranged here at least approximately horizontally. The here at least approximately horizontally arranged connection surface is a functional unit interchangeable assignable. A respective functional unit can be a rotating or revolving element, such as the brake band 17 , record, record a rotating or revolving support element, have a pneumatically acting element or be designed as a dummy bar o. Ä. Further training, the brake station 6 another carrier element 13 for example, on the opposite side of the body 7 be assigned. In this case, the further carrier element 13 identical but mirror image of the brake station 6 be assigned. Next, the brake station 6 so that the same or different functional units are assigned. For example, the brake station 6 two brake bands at the same time 17 or a brake band 17 and another element via the carrier elements 13 take up. Preference is given by the support elements 13 identical replaceable functional units recorded.

The brake station 6 Preferably assigned exchangeable functional unit may also have at least approximately horizontally arranged base surface and on this base with the connection surface on the support element 13 the brake station 6 be connected or be. Preferred is a functional unit for receiving and guiding a brake band 17 as a squeegee 16 educated. This squeegee 16 has at the front in the sheet running direction BLR front end and at the rear end in each case a deflection area with deflecting elements for the circumferentially feasible brake band 17 on. Between the two deflection areas is a suction area with at least one suction air opening at the brake band 17 formed to sweeping surface. The squeegee is preferred 16 formed here with two side walls, between which a front deflection roller and a rear deflection roller is preferably received rotationally movable. Between the front deflecting roller and the rear deflecting roller, a suction plate with a guide surface, in particular continuous or contoured, for the brake band which slides over the suction plate is preferred here 17 intended. In the suction plate is preferably at least one suction air duct and / or at least one suction air hole introduced, which from the brake band 17 is swept over. A suction air duct is preferably formed with an extension oriented in sheet running direction BLR on the surface of the suction plate. Between the front pulley and the rear pulley is the brake band 17 held in contact with the suction plate, so that not shown openings or holes of the brake band 17 in cooperation with the vacuum applied in the suction air duct and / or the suction air hole, a suction effect on the over the brake station 6 train transported arch bases. The applied negative pressure can be adjustable or regulated.

The here as a squeegee 16 trained functional unit can via one or two positional securing bolt the support element 13 be assigned via the connection surface. A pneumatic connection is preferably via the position securing bolts receiving holes in the connection surface of the support element 13 , For example, via integrated in the position assurance bolt air ducts made. Preferably, the suction strip 16 in the front deflection region, for example in the region of the front deflection roller, a recess or recess, and particularly preferably both side walls. The recess is particularly preferably in the upper region in the vicinity of a deflection region for the revolving element, in particular brake band 17 , intended. Recesses in the region of the front deflecting roller, in particular between the front deflecting roller and the suction plate, of the suction strip are preferred 16 intended. The recesses could, for example, be semicircular. The recesses facilitate gripping a circumferential element, in particular the brake band 17 For example, for the purpose of a swap or a bill of exchange. Through the recesses is also the exchange of the rotating element, in particular brake band 17 , simplified with the help of a tool. Also, tempering, in particular tempering, can in the squeegee 16 be integrated.

Preferably, one or the two side walls of the squeegee 16 at least flush over the rear pulley but preferably designed to be overhanging, so that a guide of falling sheet trailing edges in the region of the rear pulley is realized or realized. In particular, the side walls in the region of the falling sheet trailing edges act as guide elements or guide surfaces for the vertically falling sheet trailing edges. The distance between a preferably vertically formed abutment surface of the axis of rotation of the rear guide roller corresponds to at least the radius of the rear guide roller plus the strength of the circumferentially guided element, in particular the brake band 17 , The abutment surface is thus at its next point further from the axis of rotation of the rear guide pulley spaced as the contact surface of the guided around the rear guide pulley brake band 17 , In particular, worn and / or damaged brake bands 17 can thus cause no bow damage in the deflection, in particular falling bow trailing edges in the rear pulley. Preferably, the two side walls on a continuous and / or rounded surface, which achieve a guiding effect in sheet contact. Through the two here on the rear pulley and the brake band 17 projecting side walls of the squeegee 16 can also be a guide of the brake band 17 to the hedgehog wheel 15 produced, what an exact engagement of the hedgehog wheel 15 in the openings or holes of the brake band 17 ensures. Wear is reduced.

The brake band 17 is preferably preferably spaced from each other arranged openings, also called suction openings formed. The openings are preferably in the middle of the endless brake band 17 arranged. But there may also be areas with different density of breakthroughs on the one or more brake bands 17 be provided. A brake band 17 may consist of one or more connected layers and / or have a symmetrical cross-section. The brake band 17 may also have local elevations, in particular webs. For example, a brake band 17 one, two or more, for example, aligned in the direction of rotation elevations, in particular continuous webs have. In the case of two spaced-apart webs, the openings are preferably provided between these webs. The breakthroughs may also have countersinks on the outside of the band. A brake band 17 can in particular from the front pulley and the rear pulley of the squeegee 16 guided and the drive wheel, in particular the hedgehog 15 , the braking station 6 be driven endlessly circulating.

The rotational movement of the hedgehog wheel 15 is preferably non-positive and / or positive fit to the brake band 17 transferred, so that this rotates endlessly. The drive of the brake band 17 takes place preferably from here as a hedgehog 15 trained drive wheel of the brake station 6 , where the hedgehog wheel 15 Here preferably with pins in the openings of the brake band 17 intervenes. The hedgehog wheel 15 is preferred by the first drive element, preferably the first square shaft drive 8th , the braking station 6 , For example, via an intermediate stage or a gearbox, rotationally driven. The drive of the drive wheel, in particular of the hedgehog wheel 15 , Preferably takes place dynamically and discontinuously preferably clock bound between at least approximately machine speed and the deposition speed. As a drive for the first drive element, in particular the square shaft of the first square shaft drive 8th , For example, a servo motor can be used. Furthermore, the drive with a control device, such as the machine control, cooperate, on a desired filing speed and / or if necessary, the course of movement of the brake band 17 is adjustable and modifiable. This is the sheet brake 5 with the braking stations 6 adaptable to the different printing conditions, in particular to the printing material used. Alternatively, a braking station 6 be associated with a separate drive and / or a drive of the brake band 17 occur at a constant or variable speed below the machine speed.

A respective brake station 6 the sheet brake 5 At least one pneumatic connection is assigned. The at least one pneumatic connection is preferred here as suction air connection 11 formed, which communicates with at least one example, not shown negative pressure generator in connection. The suction air connection 11 For example, for the suction air supply of the pad of the support element 13 be assigned assigned functional unit. For example, as a squeegee 16 trained functional unit the support element 13 assigned, the suction area of this squeegee 16 be subjected to suction or negative pressure. The pneumatic connection, here the suction air connection 11 , can along the braking station 6 or, as shown here, for example, within the body 7 the brake station 6 be continued. Alternatively, the pneumatic connection can also be used as a compressed air connection to generate a negative pressure at the brake station 6 be executed according to the ejector principle. Further education can still further pneumatic in particular suction air leading connections of the brake station 6 be assigned, which is also outside the main body 7 can be performed to the corresponding site of action. It is also possible to provide at least partially different suction air or compressed air levels for different functional units or different states.

The suction air connection 11 is preferred here in the main body 7 the brake station 6 incorporated and leads here also in the main body 7 the brake station 6 to the carrier element 13 the brake station 6 , In this case, at least temporarily or permanently overpressure can be applied to the pneumatic connection. This can be a blowing air effect by the braking station 6 be achieved. For example, pneumatic support elements can be supplied with blown air and / or cleaning purposes are tracked. The suction and / or blowing air of the brake station 6 may preferably be infinitely adjustable or adjustable. Particularly preferred is a timing of the suction and / or blowing air of the brake station 6 by an air control element, in particular a rotary valve 14 , which is the brake station 6 can be assigned. A rotary valve 14 For example, it may have three recesses for separately controlling the suction air of a catcher element and two pneumatic ports for the functional unit. Such a rotary valve 14 For example, by the second drive element, in particular the second square shaft drive 9 , be operated. A drive shaft, especially square shaft, of the second drive element can be driven by a single-speed servo motor, for example. The drive movement of the servomotor is preferably adjustable and / or matched to the bow sequence. By means of the rotary valve 14 In particular, a cyclic pneumatic control, in particular a control of the intake air, to a catcher element and / or each functional unit used, in particular the squeegee 16 , respectively.

The 3 shows a perspective view of a sheet brake 5 with braking stations 6 For example, as described above. The sheet brake 5 contains the arranged over the machine width guide traverse, for example, a spindle drive for axial adjustment of the brake stations 6 can be assigned. On the side facing the stacking area, a traverse is arranged over the width of the machine, which here is the trailing edge traverse 18 Running the sheet brake 5 assigned. The trailing edge crossbar 18 carries several trailing edge stops 19 , Which are each mounted pivotably about a pivot axis oriented in the sheet running direction BLR. The trailing edge crossbar 18 here has an upper at least approximately horizontally arranged surface, in the preferred blown air nozzles 20 are integrated. The blowing air nozzles 20 are here in the surface of the trailing edge traverse 18 for example, as slot nozzles introduced such that they each have a pointing in the direction of the stack area outlet opening. The slot nozzles can, for example, by milling and / or holes in the surface of the traverse 18 getting produced. Preference is given to covering or inserting a cover element, in particular a nozzle plate 22 , in the milled recess of the truss surface.

The 4 shows a traverse, in particular Hinterkantentraverse 18 , with through a nozzle plate 22 formed Blasluftdüsen 20 , Such a nozzle plate 22 For example, can be plugged, screwed and / or magnetically fixable the traverse, in particular Hinterkantentraverse 18 , be assigned. In particular, the nozzle plate 22 here so the Traverse, especially Hinterkantentraverse 18 , added by gluing that so blowing air nozzles 20 each producing a blast air jet with a directed in the sheet running direction BLR component. The traverse, in particular the trailing edge traverse 18 , is in pneumatic communication with at least one blast air source. The Blasluftquelle is here in particular as Blasluftanschluss 12 or compressed air connection formed and is correspondingly with at least one example controllable compressed air source, such as a compressor, in operative connection or flow connection. There may also be other blast air sources of the traverse, in particular Hinterkantentraverse 18 be assigned.

Furthermore, the blast air device may have an air control element which controls the blast air of one, several or all blast air nozzles 20 controls. In particular, the blowing air of the blast air device by the air control element, in particular the rotary valve 14 the sheet brake 5 , to be controlled. Alternatively or additionally, the blast air device may comprise at least one separate air control or regulating element, with which the compressed air provided by the Blasluftquelle controllable or controllable the Blasluftdüsen 20 jointly, in groups or separately. It is preferably provided, one or two further air control elements, in particular further rotary valve, the traverse, in particular Hinterkantentraverse 18 to allocate directly. By means of the air control elements, a fine adjustment of the Blasluftzufuhr to the Blasluftöffnungen or Blasluftdüsen 20 be made without significant delay or pressure loss. In particular, both sides of the sheet brake 5 For example, be provided on the signs more rotary valve for air control of the blast air. These further air control elements, in particular further rotary valves, are preferably separate from the air control elements, in particular the rotary valves 14 , the braking stations 6 adjustable. For example, the further rotary valves can have rotatable jacket bodies. In particular, the effective time of the blow-air device can thus be set or changed or adjusted. For example, it may be provided that a drive of the further air control elements, in particular the further rotary valve, by the drive of the air control elements, in particular the rotary valve 14 , the braking stations 6 off, for example, by the drive of the second drive elements of the braking stations 6 , in particular of the square shaft of the second square shaft drives 9 , In particular, it is provided that the effect of the blowing air of the blower device is variable or adjustable to the brake elements, in particular brake bands 17 to shape adjacent suction air.

A respective blowing air nozzle 20 Here, in particular, has an outlet opening through which a blast air jet or a fan-shaped blast air jet emerges when compressed air is present. The blowing air nozzles 20 are so on the traverse, in particular trailing edge traverse 18 , Are arranged or aligned that are ejected with these blown air jets with a horizontal in the sheet running direction BLR component. The blowing air nozzles 20 the traverse, in particular trailing edge traverse 18 , thus form an across the mesh width at least in sheet format active Blasluftlinie, which is directed into the stack area. In particular, only a single blown air line with preferably exclusively horizontal blown air is generated by the blown air device here. The blowing air nozzles 20 can the traverse, especially trailing edge 18 , also inclined to be assigned. Other directional components of the blast air can For example, be directed to the respective machine side and / or down or up. The directional components can also be developed, for example, by displaceability of the blowing air nozzles 20 be changeable.

The blast air device may preferably in dependence on the sheet case image and / or the axial arrangement or displacement of the brake station 6 the sheet brake 5 be made adjustable. In particular, it may be provided that the intensity of the blast air jets in the region of a brake station 6 , in particular a brake band 17 to adjust such that a falling bow 1 falls faster at these points and is brought into a flat position. For the blowing intensity of the blowing air nozzles 20 , which are below a respective brake station 6 located, increased and / or the blowing intensity of the other blowing air nozzles 20 be reduced. Alternatively or additionally, the blowing air duration of the braking stations 6 adjacent associated Blasluftdüsen 20 increases and / or the Blasluftdauer the remaining Blasluftdüsen 20 be shortened.

The 5 shows an enlarged side view of a traverse, in particular trailing edge traverse 18 a sheet-processing machine, for example as described above, with integrated Blasluftdüsen 20 , The here the traverse, in particular trailing edge traverse 18 , Associated blast air device contains in addition to the blowing air nozzles 20 other pneumatic connection means, which some or all Blasluftdüsen 20 connect. The traverse, in particular trailing edge traverse 18 , preferably takes at least one pneumatic channel 21 on which within the traverse the blowing air nozzles 20 and / or the blast air connection 12 with the blowing air nozzles 20 combines. The channel 21 can be milled in a simple way across the machine width in the traverse and with a cover, such as a cover plate 23 , to be introverted. The cover plate 23 can, for example, on the traverse, in particular Hinterkantentraverse 18 , be attached by adhesive bonding and so the channel 21 form. The blowing air nozzles 20 can as well as the pneumatic connections between channel 21 and blowing air nozzles 20 be produced by drilling. air nozzles 20 Alternatively, they may also have separate nozzles with outlet openings which are inserted into the traverse, for example screwed in. By virtue of interchangeable nozzles having suitable outlets, the blast air device is adaptable to varying pressure conditions. In particular, the nozzle size can be easily changed or adjusted.

The blowing air nozzles 20 the blowing air device each have an outlet opening, which is aligned here in particular exclusively horizontally in the sheet running direction BLR. The outlet openings of the blowing air nozzles 20 lie here in particular in the plane of the directly facing the stack area stop surfaces of the trailing edge stops 19 , The from the blowing air nozzles 20 preferably timed outgoing blast air jets form a suction effect for each individual sheet at least in accordance with the sheet format over the machine width 1 , The suction effect of the blast air jet through the aerodynamic paradox acts according to the selected blast intensity of the respective blast air nozzle 20 , The blast air device is thus the location of each sheet 1 influenced and can be corrected accordingly. It can affect the bow 1 through the blowing air nozzles 20 the blast air device by hand and / or sensor values are made. Also, a fully automatic creation or adaptation of the blown air profile formed over the machine width, possibly also after evaluation of the sheet dropping process, can be undertaken. The blown air jets emitted by the blower device can furthermore also be aligned, adjusted or controlled or regulated independently of one another. Furthermore, an individually controlled or regulated supply of blast air can also take place. The times of Blasluftanstellung and / or the Blasluftabstellung can also be carried out separately adjustable or adjustable as the Blasluftintensität.

The 6 shows an embodiment of a blower with blowing air nozzles 20 at the braking stations 6 the sheet brake 5 for a sheet processing machine, for example as described above. A blowing air nozzle 20 the blowing air device is here at least one of the braking stations 6 and preferably all braking stations 6 the sheet brake 5 assigned. In this case, for example, a blown air 20 a braking station 6 assigned such that the blast air steel in the region of the respective brake element, in particular the brake band 17 , exit. The blowing air nozzle 20 is preferably mounted axially adjustable and is particularly preferred together with the respective brake station 6 adjusted. For example, the blown air nozzle 20 one the delivery pile 2 facing surface of the brake station 6 be assigned. The blowing air nozzle 20 can at one the delivery pile 2 facing side of a body 7 and / or a squeegee 16 the brake station 6 be arranged. One in the area of the brake station 6 , in particular the brake element, for example the brake band 17 , Exiting blast air jet causes a faster flatness of the sheet trailing edge, especially between the braking stations 6 the sheet brake 5 sagging bow 1 , especially with light grammages. The blowing air nozzles 20 the brake stations 6 can also be controlled independently of each other. For example, the start of blowing, the blowing end and / or the blowing intensity can be set or regulated separately.

The 7 shows an embodiment of a blower with blowing air nozzles 20 at the braking stations 6 the sheet brake 5 and on a traverse, in particular a trailing edge traverse 18 in the delivery of a sheet-processing machine, for example as described above. It can one, several or all braking stations 6 one blown air nozzle each 20 be assigned, for example, with the respective brake station 6 is relocated. In particular, the blown air nozzle 20 a braking station 6 at one of the delivery piles 2 facing surface of the brake station 6 be assigned. The blowing air nozzle 20 can at one the delivery pile 2 facing side of a body 7 and / or a squeegee 16 the brake station 6 be arranged. At least one additional blower nozzle 20 is vertically spaced from one or all of the braking stations 6 associated blowing air nozzles 20 arranged. The upper, the braking stations 6 associated blowing air nozzles 20 For example, with the respective braking stations 6 be activated or deactivated.

Preferably, a plurality of vertically arranged across the machine width of the or the upper Blasluftdüsen 20 spaced lower blowing air nozzles 20 used, which can be deactivated, for example, outside of the sheet format. The lower blowing air nozzles 20 are preferably a traverse arranged over the machine width, in particular a trailing edge traverse 18 assigned, for example, as described above. It can be a blowing effect of the braking stations 6 associated blowing air nozzles 20 and from the below vertically spaced blowing air nozzles 20 be achieved. Preferably, a two-stage or multi-stage blasting can be carried out by first removing from the braking stations 6 associated blowing air nozzles 20 and following from the lower, for example, the traverse, in particular Hinterkantentraverse 18 , associated blowing air nozzles 20 a blown air jet or a blown air blast is emitted. The setting of the blast air jets of the blowing air nozzles 20 takes place, for example, such that a sheet trailing edge is brought by the offset acting blast air jets in a flat position. Here, the Blasluftbeginn, the Blasluftdauer or the Blasluftende and / or the Blasluftintensität the upper and / or lower Blasluftdüsen 20 be adjusted or adjusted. This can also be done according to sensor values.

LIST OF REFERENCE NUMBERS

1

 bow

2

 delivery pile

3

 gripper carriages

4

 sheet guide plate

5

 sheet brake

6

 braking station

7

 body

8th

 first square shaft drive

9

 second square shaft drive

10

 ./.

11

 suction air

12

 air ventilation

13

 support element

14

 rotary vane

15

 Igelrad

16

 squeegee

17

 brake band

18

 Bute Traverse

19

 Rear edge stop

20

 blowing air nozzle

21

 channel

22

 nozzle plate

23

 Cover plate

BLR

 Sheet running direction

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

• DD 111870 [0004]
• DE 19816314 A1 [0005]

Claims (15)

Display of a sheet-processing machine with a braking station ( 6 ) having sheet brake ( 5 ), where arc ( 1 ) of conveyor systems towards a delivery pile ( 2 ) via the braking stations ( 6 ) and wherein a blast air device is provided, with which at least one blast air jet with a directed in the sheet running direction (BLR) component is ejected, characterized in that the blast air device arranged over the machine width Traverse ( 18 ) and / or at least one braking station ( 6 ) assigned. Display of a sheet-processing machine with a braking station ( 6 ) having sheet brake ( 5 ), where arc ( 1 ) of conveyor systems towards a delivery pile ( 2 ) via the braking stations ( 6 ) and wherein a blow-air device is provided, with the blown air jets are each ejected with a directed in sheet running direction (BLR) component, characterized in that the blowing air device at least two vertically spaced Blasluftdüsen ( 20 ) and that the blowing air nozzles ( 20 ) independently controllable and / or a blown air nozzle ( 20 ) opposite to the other blowing air nozzle ( 20 ) is displaceable. Display according to claim 1 and / or 2, characterized in that a blown air nozzle ( 20 ) of the blast air device is arranged axially and / or vertically displaceable. Display according to claim 1, 2 and / or 3, characterized in that a blown air nozzle ( 20 ) of the blast air device together with a braking station ( 6 ) the sheet brake ( 5 ) is arranged axially adjustable. Display according to claim 1, 2, 3 and / or 4, characterized in that the display a traverse ( 18 ) with trailing edge stops ( 19 ) and the Blaslufteinrichtung this Traverse ( 18 ) and / or one of the delivery stacks ( 2 ) facing surface of a brake station ( 6 ) assigned. Display according to claim 1, 2, 3, 4 and / or 5, characterized in that the traverse ( 18 ) is in pneumatic communication with at least one blast air source and / or at least one pneumatic channel ( 21 ). Display according to claim 1, 2, 3, 4, 5 and / or 6, characterized in that at least one blowing air nozzle ( 20 ) of the blast air device at the delivery stack ( 2 ) facing side of a traverse ( 18 ) and / or at the delivery pile ( 2 ) facing side of a body ( 7 ) and / or a squeegee ( 16 ) a braking station ( 6 ) ejects a blast air jet. Display according to claim 1, 2, 3, 4, 5, 6 and / or 7, characterized in that blowing air nozzles ( 20 ) in the traverse ( 18 ) and / or by means of a nozzle plate ( 22 ) are coverable. Display according to claim 1, 2, 3, 4, 5, 6, 7 and / or 8, characterized in that the blast air device at least one air control element, in particular a rotary valve ( 14 ), for controlling the blowing air supply to blowing air nozzles ( 20 ) having. Display according to claim 1, 2, 3, 4, 5, 6, 7, 8 and / or 9, characterized in that a leading edge stop and / or a side edge stop one in the direction of the delivery stack ( 2 ) Directed Blasluftöffnung is assigned. Method for depositing sheets ( 1 ) in the delivery of a sheet-processing machine with a braking station ( 6 ) having sheet brake ( 5 ), where arc ( 1 ) of conveyor systems towards a delivery pile ( 2 ) via the braking stations ( 6 ) and wherein a blast air device is provided, with which at least one blown air jet is ejected with a directed in the sheet running direction (BLR) component, characterized in that with the Blaslufteinrichtung clocked blown air is ejected. Method for depositing sheets ( 1 ) in the delivery of a sheet-processing machine with a braking station ( 6 ) having sheet brake ( 5 ), where arc ( 1 ) of conveyor systems towards a delivery pile ( 2 ) via the braking stations ( 6 ) and wherein a Blaslufteinrichtung is provided, are ejected with the blown air jets, each with a directed in the sheet running direction (BLR) component, characterized in that vertically spaced apart from the Blaslufteinrichtung and independently controlled blowing air is ejected. Method according to claim 11 and / or 12, characterized in that a blown air nozzle ( 20 ) of the blast air device in the area of a brake station ( 6 ) is provided. A method according to claim 11, 12 and / or 13, characterized in that the blowing air is discharged depending on the machine speed and / or material and / or in dependence of the machine cycle and / or the machine angle and / or a sheet position. The method of claim 11, 12, 13 and / or 14, characterized in that by the blowing air device, the start of blowing, the blowing time and / or the blowing intensity of Blasluftdüsen ( 20 ) is set separately.

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