Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F27/00—Devices for attaching printing elements or formes to supports
  • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
  • B41F27/1206—Feeding to or removing from the forme cylinder
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F27/00—Devices for attaching printing elements or formes to supports
  • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
  • B41F27/1281—Devices for attaching printing elements or formes to supports for attaching flexible printing formes details of the printing plate ends

Definitions

• the invention relates to devices for mounting a printing form on a form cylinder of a printing press according to the preamble of claim 1 or 14.
• DE 39 40 795 A1 discloses a method and a device for automatically feeding a printing plate to a plate cylinder or removing it from a plate cylinder of a rotary printing press.
• the method for automatically feeding a printing plate to a plate cylinder of a rotary printing press, the plate cylinder having, among other things, means for clamping and tensioning the printing plate provides that the printing plate is placed in a storage chamber of a printing plate feed or removal device and the plate cylinder is rotated into a printing plate feed position and the printing plate is fed to a clamping device of the plate cylinder by means of a number of transport rollers.
• the method for the automatic removal of a printing plate from a plate cylinder of a rotary printing press is characterized in that the plate cylinder rotates forward into a printing plate release position, that a clamping flap for detecting a printing plate end opens that the plate cylinder is rotated backwards, that a clamping flap is opened to detect the start of a printing plate and that the printing plate is fed to a storage chamber of a printing plate feed or removal device by means of a number of transport rollers.
• the device for performing the aforementioned methods has at least one transport roller designed as a drive roller and one transport roller designed as a pressure roller, wherein the pressure roller can be adjusted to the drive roller.
• a swivel-mounted pressure roller for pressing the pressure plate on the plate cylinder and ejection fingers can be provided, the ejection fingers having tips which are arranged so as to be pivotable into the periphery of the plate cylinder.
• the storage chamber of the printing plate feed or discharge device can also be pivoted about a joint.
• DE 39 40 796 A1 describes a device for automatically changing a printing plate on a plate cylinder of a rotary printing press, the plate cylinder u. a. Has means for clamping and tensioning the printing plate, the printing plate changing device having at least two storage chambers, so that a printing plate loosened on the plate cylinder can be guided into one storage chamber by means of transport rollers, while a printing plate stored in the other storage chamber is fed to a clamping device of the plate cylinder by means of transport rollers.
• EP 1 084 837 A1 describes a device for holding and conveying a printing form.
• the device has translatory conveying devices which convey a printing form to be mounted on a forme cylinder or a printing form to be removed from a form cylinder. While the device is tilted from a rest position into its operating position for changing a printing form about an axis of rotation, a hook swivels only because of its own weight into the space in which the printing form is stored and secures the printing form at its trailing, bent end against unintentional falling out this room.
• EP 0 734 859 A1 describes a device for changing printing forms, with a printing form loading unit for changing printing forms pivoting from a vertical rest position onto a holding element designed as a gripper.
• the holding element grips a new printing form provided in the printing form loading unit and executes a pivoting movement with the gripped printing form by means of an actuated lifting cylinder.
• the printing form which is stored in a straight line in a printing form feed compartment, is raised in its front region, the leading end of the printing form hanging downward.
• the leading end of the curved printing form gripped by the holding element is pivoted against a forme cylinder by the holding element in such a way that a hanging leg formed at the leading end of the printing form can dip into a channel formed on the form cylinder with a relatively large opening width to the diameter of the form cylinder.
• JP 05 000 503 A and AA disclose a device for the longitudinal alignment of a printing form during its assembly on a forme cylinder, compression springs arranged along the longitudinal side of the printing form pressing the printing form to be mounted against a stop which is stationary with respect to the printing form, the compression springs being in The mounting direction of the printing form has a curved end that lies against the printing form.
• the permanent contact of the compression springs on the printing form restricts their freedom of movement considerably; in particular, because of the curved end, movement of the printing form against its mounting direction is not possible, at least they harbor the risk of getting caught.
• compression springs do not have a constant contact force as soon as printing forms of different widths are used, because as a result of Hooke's law, the contact force of compression springs depends on their travel.
• the invention has for its object to provide devices for mounting a printing form on a form cylinder of a printing press.
• the advantage that can be achieved with the invention is, in particular, that elevators on a cylinder can be changed quickly and reliably, in particular even while the printing press is in production.
• Figure 1 is a perspective view of an elevator.
• FIG. 2 shows a simplified sectional illustration of a holding device for an elevator to be mounted on a cylinder
• Fig. 3 tangentially brought up to a cylinder elevators on which a radial force acts when they are installed;
• FIG. 5 shows a 4-cylinder printing machine with a horizontal paper guide and with printing form magazines
• FIG. 6 shows a printing form magazine with a conveying device for a used printing form
• 7 shows a printing form magazine with an inclined elevator for conveying a new printing form
• FIG. 8 shows a device in a printing form magazine for aligning a new printing form with respect to a forme cylinder
• FIG. 10 shows a printing form magazine with a new printing form with its printing side resting on a support
• FIG. 11 shows a printing form magazine with a conveying device for a used printing form
• FIG. 12 is a partial sectional view of a printing form magazine with a friction body placed on a printing form
• FIG. 13 shows a friction body guided in a channel, the channel being provided with openings.
• An elevator 01 (Fig. 1) z. B. is designed as a plate-shaped printing form 01 or as a support plate carrying a printing blanket, has a substantially rectangular area with a length L and a width B, the length L z. B. Measured values between 400 mm and 1300 mm and the width B z. B. can take measured values between 280 mm and 1500 mm.
• the surface has a support side, which is referred to below as support surface 02, with which the elevator 01 rests in the assembled state on a lateral surface 07 of a cylinder 06 (FIG. 2).
• the back of the support surface 02 is a work surface which, in the event that the elevator 01 is designed as a printing form 01, is provided with a printed image or at least can be provided with a printed image.
• the elevator 01 has two opposite ends 03; 04 preferably each with angled hanging legs 13; 14, the ends 03; 04 limit the contact surface 02 and the hanging legs 13; 14 preferably extend entirely or at least partially across the width B of the elevator 01.
• the bearing surface 02 of the elevator 01 is flexible at least along the length L and can be adapted to the curvature of the cylinder 06 when the elevator 01 is attached to a lateral surface 07 of a cylinder 06 of a printing press (FIG. 2).
• the length L of the support surface 02 thus runs in the direction of the circumference of the cylinder 06, whereas the width B of the support surface 02 extends in the axial direction of the cylinder 06.
• the measure for the width B varies within certain, predetermined tolerance limits, since the original width B of the elevator 01 is reduced by trimming on at least one of the long sides of the elevator 01, in order, for. B. the position of a printed image on the working surface of the elevator 01 to a certain distance to at least one of the long sides of the elevator 01.
• the tolerance limits are z. B. in the range of fractions of a millimeter to a few millimeters.
• the width B of an elevator 01 can differ from other similar elevators 01 used on the same cylinder 06 within the permissible tolerance limits.
• the hanging legs 13; 14 of the elevator 01 is fastened by means of a holding device, the holding device being arranged in a channel 08, the channel 08 generally extending in the axial direction to the cylinder 06.
• An end 03 of elevator 01 which is aligned with the production direction P of cylinder 06 is referred to as its leading end 03, whereas the opposite end 04 is the trailing end 04 of elevator 01.
• At least the ends 03; 04 of the elevator 01 with the hanging legs 13; 14 consist of a rigid, for. B. metallic material, e.g. B. made of an aluminum alloy.
• the material thickness D of the elevator 01 (FIG.
• the elevator 01 thus exists as a whole or at least at its ends 03; 04 made of a dimensionally stable material so that the ends 03; 04 are permanently deformable by bending against material-specific resistance.
• At least at one end 03; 04 of the elevator 01 (Fig. 1), but preferably at both ends 03; 04 are along a bending edge 11; 12 each a folded-in hanging leg 13; 14 formed, the hanging legs 13; 14 can be inserted into a narrow, in particular slot-shaped opening 09 of the channel 08 of the cylinder 06 (FIG. 2) and can be fastened there by means of a holding device.
• a hanging leg 13 on the bending edge 11 by an opening angle ⁇ 1 or at the end 04 a hanging leg 14 on the bending edge 12 by an opening angle ⁇ 1 folded (Fig. 1)
• the opening angle ⁇ 1 at the trailing end 04 of the elevator 01 is often preferably designed to be larger than 80 ° or obtuse angle, in particular it is 85 ° or 135 °.
• the folded hook leg 13 at the leading end 03 has a length 113, which, for. B. is in the range of 4 mm to 30 mm, in particular between 4 mm and 15 mm.
• the folded hook leg 14 at the trailing end 04 has a length 114, the z. B. 4 mm to 30 mm, in particular between 8 mm and 12 mm, the shorter length being preferred, in order to remove the hanging legs 13; 14 to ensure from the opening 09 of the channel 08.
• FIG. 2 shows a simplified sectional illustration of a cylinder 06 with a lateral surface 07 and a channel 08, which is a narrow, has slot-shaped opening 09 with a slot width S, the slot width S being less than 5 mm and preferably in the range from 1 mm to 3 mm.
• the opening 09 has a front edge 16 and a rear edge 17 in the production direction P of the cylinder 06.
• An acute opening angle ⁇ 2 is formed between the wall 18 extending from the front edge 16 to the channel 08 and an imaginary tangent T1 resting on the lateral surface 07 of the cylinder 06 on the opening 09, which is between 30 ° and 50 °, preferably 45 ° is.
• the beveled suspension leg 13 at the leading end 03 of the elevator 01 can thus preferably be positively attached to this front edge 16 of the opening 09, because the opening angle ⁇ 1 at the leading end 03 of the elevator 01 is preferably adapted to the opening angle ⁇ 2.
• the beveled suspension leg 14 at the trailing end 04 of the elevator 01 can thus preferably be positively attached to this rear edge 17 of the opening 09 because the opening angle ⁇ 1 at the trailing end 04 of the elevator 01 is at least approximately matched to the opening angle ⁇ 2.
• channel 08 z. B. at least one preferably pivotally mounted holding means 21 and a preferably biased spring element 22, the spring element 22, the holding means 21 z. B. presses against the folded-in suspension leg 14 at the trailing end 04, which is hooked into the opening 09 at its rear edge 17, whereby the suspension leg 14 is held at the trailing end 04 on the wall 19 extending from the rear edge 17 to the channel 08 becomes.
• an adjusting means 23 in the channel 08 provided which, when actuated, pivots the holding means 21 against the force of the spring element 22.
• the holding device accordingly essentially consists of the holding means 21, the spring element 22 and the adjusting means 23.
• the cylinder 06 described by way of example can be designed such that several, preferably identical, elevators 01 can also be arranged on its lateral surface 07. If the cylinder 06 is designed as a forme cylinder, it can z. B. can be assigned with six plate-shaped printing plates 01. It can also be provided that more than one elevator 01 can be attached to the cylinder 06 in the direction of its circumference. So z. B. two axially extending to the cylinder 06 channels 08 may be provided with associated openings 09, which are arranged offset on the circumference of the cylinder 06 by 180 ° to each other.
• the elevators 01 arranged next to one another in the axial direction of the cylinder 06 can also be arranged offset with respect to one another, for. B. individually or in groups in each case by half a length L of the elevator 01, but this means that additional channels 08 with associated openings 09 or at least with portions thereof are introduced into the cylinder 06, which along the circumference of the cylinder 06 to the two aforementioned Channels 08 and openings 09 z. B. are arranged offset by 90 °.
• a method for mounting a flexible elevator 01 on a cylinder 06 of a printing press is described below, the elevator 01 having a leading end 03 and a trailing end 04 with respect to the production direction P of the cylinder 06 (FIG. 3).
• a hanging leg 13 is formed, this hanging leg 13 being extended Length L of the elevator 01 with a maximum opening angle ⁇ 1 of 90 °, preferably 45 °.
• At least one preferably slot-shaped opening 09 is provided in the cylinder 06 with an edge 16 and a second edge 17 in the production direction P of the cylinder 06, the edges 16; 17 preferably run parallel to one another in the axial direction of the cylinder 06.
• the method is characterized in that the leading end 03 of the elevator 01 is preferably fed tangentially to the cylinder 06 in the direction of its production P by means of a thrust force preferably acting on the trailing end 04 of the elevator 01 and the hanging leg 13 at the leading end 03 behind the second edge 17 of the opening 09 is placed against the cylinder 06, so that when the cylinder 06 rotates in the direction of production P of the hanging leg 13 formed at the leading end 03 as a result of a radial force FR directed towards the cylinder 06 and acting at least on the leading end 03 into the opening 09 engages and hooks on the first edge 16 by a preferably positive fit there.
• the pushing force promoting the elevator 01 is advantageously a force acting in the plane of the elevator 01 in its assembly direction M.
• the radial force FR can be the weight force FG of the elevator 01 acting on the lateral surface 07 of the cylinder 06.
• the hanging leg 13 at the leading end 03 of the elevator 01 falls predominantly, ie with a share of more than 70% of the total of all forces acting on the hanging leg 13, due to its weight force FG acting on the leading end 03 into the opening 09 of the cylinder 06, without the need for a pretensioning of the leading end 03 of the elevator 01, which uses the elasticity of the elevator 01, or other aids such as a rolling element.
• the leading end 03 of the elevator 01 can be elastically pretensioned (FIG. 4), so that the hanging leg 13 formed on the leading end 03 as a result of a restoring torque MR directed towards the cylinder 06 into the opening 09 springs as soon as the opening 09 of the cylinder 06 and the line of contact 27 of the hanging leg 13 with the lateral surface 07 of the cylinder 06 as a result of a relative movement between the elevator 01 and the cylinder 06, which is caused in particular by the rotation of the cylinder 06 in the production direction P, face directly.
• the restoring moment MR results from the fact that the elevator 01 consists of an elastically deformable material and thus inherently has an elastically resilient property, this property being used insofar as the leading end 03 of the elevator 01 when approaching the cylinder 06 z. B. over a preferably axially extending to the cylinder 06, spaced from the cylinder 06 arranged edge 26 of a support member 24 and is bent there such that a bending stress builds up with a spring force directed to the cylinder 06 at the leading end 03 of the elevator 01 (dashed line of elevator 01 in Fig. 4).
• the trailing end 04 of the elevator 01 is fed from a spatial direction fixed to the cylinder 06.
• the elevator 01 is accordingly during the assembly process through the contact line 27 of its hanging leg 13 attached to the leading end 03 with the The lateral surface 07 of the cylinder 06 and stabilized by its support on the edge 26 of the support element 24 and by a positional fixation 28 of the trailing end 04.
• the support element 24 may e.g. B. be a rolling element 24, the z. B. can be adjusted to the cylinder 06. In this case, the support element 24 is preferably arranged close to the cylinder 06.
• roller element 47 or 62 (FIG. 6 or 9) can be provided, which will be discussed later, wherein the support element 24 can then be arranged at a different location and cannot be adjusted to the cylinder 06 needs to be.
• the task of the support element 24 can then z. B. limit to generate a bending stress in the elevator 01.
• the leading end 03 of the elevator 01 can also be brought against the cylinder 06 in such a way that after its contact with the lateral surface 07 of the cylinder 06 this end 03 is at an acute angle ⁇ with an imaginary point 29 on the lateral surface 07 of the Second tangent T2 lying on the cylinder 06 is turned away from the lateral surface 07 of the cylinder 06 (representation of the elevator 01 in FIG. 4 with a solid line).
• the bending of the leading end 03 of the elevator 01 carried out in this way should, however, only be so strong that the hanging leg 13 attached there still lies securely against the lateral surface 07 of the cylinder 06.
• the support element 24 are placed on the elevator 01, whereby the elevator 01 is held with its leading end 03 close to the lateral surface 07 of the cylinder 06.
• the hooking leg 13 hooks on the leading end 03 of the elevator 01 on the first edge 16 of the opening 09.
• An on Rolling element 24 positioned in cylinder 06 can support the mounting of elevator 01 on cylinder 06 by rolling element 24 rolling up elevator 01 on cylinder 06.
• a hanging leg 14 is formed, this hanging leg 14 is pressed by the rolling element 24 in the course of rolling up the elevator 01 on the cylinder 06 in the opening 09 of the cylinder 06.
• a device for performing the aforementioned method is now to be illustrated using the example of a commercial web offset printing press with e.g. B. a standing rubber-against-rubber printing unit in a 4-cylinder construction with horizontal guidance of a printing material 46, preferably a paper web 46 (FIG. 5).
• a first pair of cylinders 31; 32 consisting of a forme cylinder 31 and a blanket cylinder 32 and a second pair of cylinders 33; 34 consisting of a forme cylinder 33 and a blanket cylinder 34 is provided, the paper web 46 between the two blanket cylinders 32; 34 is passed.
• the printing press preferably several, e.g. B. five or six printing points are provided for different printing inks.
• at least the forme cylinders 31; 33 are the same in size and design.
• the forme cylinder 31 can be loaded with a printing form 36 and the forme cylinder 33 with a printing form 37, the printing forms 36; 37 z. B. the circumference of the forme cylinder 31; 33 corresponding length L and one of the length of the respective bale of the forme cylinder 31; 33 have a corresponding width B.
• the printing forms 36; 37 based on its width B z. B. side by side four or six printed pages and based on their length L two printed pages in a row, thus having a total of eight or twelve printed pages.
• At the leading end 03 of the printing form 36; 37 is the opening angle ⁇ 1 between the beveled hanging leg 13 and the elongated length L of the printing form 36; 37 preferably 45 °.
• the slot width S in the forme cylinder 31; 33 introduced opening 09 is preferably 1 mm to 3 mm.
• a change of one or more printing forms 36; 37 can be carried out remotely from a control station assigned to the printing press while the paper web 46 is running.
• a certain printing ink eg. B. Black assigned printing form 36; 37 can be replaced without having to stop the printing process as a whole.
• each printing form magazine 38; 39 each have at least one shaft 41; 42 for receiving one of the respective forme cylinders 31; 33 used printing plate 36; 37 and at least one shaft 43; 44 for receiving a on the respective forme cylinder 31; 33 new printing plate 36; 37 has.
• the respective forme cylinder 31; 33 assigned printing form magazine 38; 39 z. B. by a pivoting movement of the respective forme cylinder 31; 33 for changing a printing form 36; 37 is employed z. B. the first forme cylinder 31 and the second forme cylinder 33 from their respective operative blanket cylinder 32; 34 parked.
• the blanket cylinders 32; 34 be parked by the paper web 46.
• the relevant forme cylinder 31; 33 decoupled from the paper web 46 while in the printing unit the other pair of cylinders 32; 34 can remain in production.
• the shafts 41; 43 and 42; 44 for receiving a used or new printing form 36; 37 each advantageously arranged parallel to one another, ie they are usually layered one above the other.
• a partition 84 in the respective printing forme magazine 38; 39 the shafts 41; 43 and 42; 44 separate from each other (Fig. 5).
• these shafts are 41; 43 and 42; 44 based on the running direction of the paper web 46 from a side of the printing form magazines 38; 39 accessible.
• the printing form magazines 38; 39 each preferably extend over the length of the bale of the forme cylinder 31; 33, but at least over the width B of the printing form 36; 37, and in their respective shafts 41; 43 and 42; 44 a printing form 36; 37 preferably completely, that is, according to their length L.
• the shafts 41; 43 and 42; 44 are preferably located in a housing, the housing having an opening o38; o39, which is parallel to the bale of the respective forme cylinder 31; 33 can be aligned and through which a printing form 36; 37 the forme cylinder 31; 33 can be fed or from this into the shaft 41; 43 is insertable.
• the openings o38; o39 of the printing form magazines 38; 39 based on the respective opening 09 in the forme cylinders 31; 33 at a significantly shorter distance a38; a39 to the forme cylinder 31; 33 brought up as the length L of the printing plates 36; Is 37.
• the movable arrangement of the printing form magazines 38; 39 results in better accessibility to the printing unit z. B. to carry out the work required there, for. B. Maintenance work.
• a movably arranged printing form magazine 38; 39 is in its working position in front of a forme cylinder 31; 33 at a38 distance; a39 and its orientation to the forme cylinder 31; 33 can be fixed by a lock 83 (FIG. 5).
• the lock 83 can, for. B. done by a tapered bolt 83, the z. B. with respect to the forme cylinder 31; 33 is stationary and in an opening in the housing of the printing forme magazine 38; 39 engages and one on the forme cylinder 31; 33 z. B. swung-in printing forme magazine 38; 39 with its openings o38; o39 with respect to the barrel of the forme cylinder 31; 33 centered.
• the taper pin 83 is preferably designed such that during its engagement in the housing of the printing forme magazine 38; 39 does not have a self-locking effect, but only bevels to position the printing forme magazine 38; 39 is used. It is advantageous to the forme cylinder 31; 33 in terms of page registers in a predefined position relative to the printing form magazine 38; 39 to bring him z. B. zeroing the page register before replacing a printing form 36; 37 between the forme cylinder 31; 33 and the printing forme magazine 38; 39 is coming.
• the printing form magazine 38; 39 laterally relative to the forme cylinder 31; 33 are brought into a predefined position so that the exchange of a printing form 36; 37 between the printing form magazine 38; 39 and the forme cylinder 31; 33 can be done in a targeted manner and without lateral offset.
• the printing forme magazine 38; 39 can e.g. B.
• the second printing form magazine 39 which is arranged above the paper web 46 and can be adjusted to the forme cylinder 33, has two shafts 42; 44, namely a lower shaft 42 for receiving a printing form 37 to be removed and an upper shaft 44 for providing a new printing form 37. Both shafts 42; 44 are only slightly spaced apart in the printing forme magazine 39. It is preferably provided that the printing form 37, which is located in the one shaft 42, of a printing form 37 in the other shaft 44 of the same printing form magazine 39 z. B. is spaced 30 to 40 mm, preferably less, whereby a very flat design of the printing forme magazine 39 is achieved, which is very advantageous.
• the printing form magazine 39 is pivoted in front of the forme cylinder 33 and fixed there in such a way that at least the input region of the shaft 42 for receiving the printing form 37 to be removed is preferably directed tangentially onto the lateral surface of the form cylinder 33.
• the forme cylinder 33 is rotated until an imaginary tangent T1 resting on the slot-shaped opening 09 of the forme cylinder 33 either aligns with the shaft 42 for receiving the printing form 37 to be removed or at least runs parallel to this shaft 42.
• the rotating form cylinder 33 conveys the printing form 37 to be removed into the printing form magazine 39.
• the entire process of removing a used printing form 37 from the form cylinder 33 can advantageously be done by an electrical control be controlled, preferably by be remotely controlled from a control station assigned to the printing press.
• a rolling element 47 which, for. B. can consist of several rollers arranged side by side in the axial direction, placed on the forme cylinder 33, so that the printing form 37 is pressed not far from its trailing end 04 on the forme cylinder 33.
• the holding device in the forme cylinder 33 releases the trailing end 04 of the printing form 37 and this end 04 springs out of the opening 09 due to the elasticity of the printing form 37.
• the leading end 03 of the printing form 37 is still in a form-fitting manner against the front edge 16 of the opening 09 in the production direction P of the forme cylinder 33.
• the forme cylinder 33 rotates counter to its production direction P until the trailing end 04 of the printing form 37 is inserted into the shaft 42 for receiving the printing form 37 to be removed and locked there in a form-fitting manner on a holding element 48, preferably due to the full-surface contact of the bent hanging leg 14 on Holding element 48, wherein the holding element 48 z. B. is designed as a pawl 48 (Fig. 6).
• the holding element 48 i. H. the pawl 48 thus hooks onto the beveled hanging leg 14 at the trailing end 04 of the printing forme 37.
• the holding element 48 is connected to a first conveyor device 49 assigned to the chute 42 for receiving the printing form 37 to be removed, preferably a conveyor device 49 arranged parallel to the chute 42, e.g. B. pneumatic linear drive, and pulls a hooked printing form 37 into the shaft 42.
• the first conveyor device 49 has a carriage 51 on which the holding element 48 z. B. is pivotally attached by a joint (Fig. 6).
• the forme cylinder 33 pushes the trailing end 04 of the printing form 37 into the shaft 42 for receiving the printing form 37 to be removed during its rotation against its production direction P, the bevel leg 14 bent at this end 04 against a z. B. molded on the slide 51 or attached there stops 52.
• the stop 52 is positioned in the shaft 42 such that the impact of the trailing end 04 of the printing form 37 on the stop 52 pushes the leading end 03 of the printing form 37 out of the opening 09 in the forme cylinder 33.
• the stop 52 is therefore initially arranged at a distance from the opening 09 in the forme cylinder 33 so that a printing form 37 to be removed from the forme cylinder 33, shortly before its length L is completely removed from the forme cylinder 33, with its hanging leg 14 at the trailing end 04 abuts the stop 52 and releases the hanging leg 13 on the leading end 03 of the opening 09, preferably by means of a positive fit and not by a holding means 21, at the leading end 03 by means of a transmitted pulse and without using the elasticity of the leading end 03 from the opening 09.
• the form-fitting contact of the hanging leg 13 is thus ended by a short jerk acting along the length L of the printing form 37.
• the holding element 48 engages at the trailing end 04 of the printing form 37 with the impact at the stop 52.
• the holding element 48 can, for. B. wedge-shaped and with the wedge tip to open the shaft 42, so that the trailing end 04 of the printing forme 37 during the conveying movement through the forme cylinder 33, the holding element 48 against a force acting on the printing forme 37, for. B. the weight of the holding element 48 or a spring force in operative connection with the holding element 48, first raises until the bent hanging leg 14 engages at the trailing end 04 behind the holding element 48, after which the holding element 48 lowers again into its starting position.
• the butt of the trailing end 04 of the printing form 37 with the Stop 52 triggers a control signal with which the carriage 51 of the first conveying device 49 is set in motion in order to convey the printing form 37 completely into the shaft 42.
• the used printing form 37 can then be removed laterally from the shaft 42. Removal can be made easier by the fact that an ejector 86 is preferably provided in the printing form magazine 39, which ejects the used printing form 37 laterally out of the shaft 42 to such an extent that the printing form 37 can be gripped, so that no grip into the shaft 42 is required.
• the rolling element 47 placed on the forme cylinder 33 has been turned off again by the forme cylinder 33, preferably immediately before the leading end 03 of the printing form 37 is pushed out of the opening 09 in the forme cylinder 33.
• the rolling element 47 was so positively attached to the forme cylinder 33 that it supported the conveyance of the printing form 37 during the rotation of the forme cylinder 33.
• the carriage 51 of the first conveyor 49 can e.g. B. in laterally attached rails or in ball bushings. It is advantageous to arrange an articulated, preferably pivotable guide plate 53 close to the forme cylinder 33 in front of the opening of the printing form magazine 39 which can be directed onto the forme cylinder 33 (FIG.
• Printing form 37 is directed to the shaft 42 for receiving the printing form 37 to be removed.
• the guide plate 53 for a printing form 37 to be removed from the forme cylinder 33 blocks an erroneous access to the shaft 44 in which a new printing form 37 can be provided.
• the printing form 37 to be assembled is preferably inserted into the upper shaft 44 of the printing form magazine 39 from a side that is easily accessible during the printing process. Thereafter, the assembly of the new printing form 37 on the form cylinder 33, which must be free for this printing form 37, that is to say unoccupied, can be started by an electrical control assigned to the printing press, preferably a control station become.
• a second conveyor 54 assigned to the upper shaft 44 for providing the new printing form 37 is set in motion in order to advance the new printing form 37 out of the shaft 44 of the printing form magazine 39 in the direction of the forme cylinder 33 (FIG . 7).
• the second conveyor 54 can e.g. B. be a pneumatic linear drive, which is advantageously designed as an inclined elevator, in particular for a printing form 37 which is arranged in the shaft 44, as is the case in the printing form magazine 39 arranged above the paper web 46, which means that the second conveying device 54 is one Sled 56 z. B. with a groove
• the second conveying device 54 with its conveying direction to the printing form 37 can form an opening angle of less than 30 °, preferably of 15 ° to 20 °. This selected opening angle is then fixed during the conveying and cannot be changed.
• the conveyance of the printing form 37 can be supported by a stop 58 which is integrally formed on or attached to the slide 56, the stop
• the second printing device 54 pushes the new printing form 37 with its leading end 03 preferably tangentially against the forme cylinder 33 until the hanging leg bent at this leading end 03 stands on the lateral surface of the forme cylinder 33.
• the printing form 37 is moved by a slide 59 or guided by at least one articulated, in particular pivotable lever 59 arranged laterally in the shaft 44 against a non-deformable, lateral stop 61, which is arranged in the shaft 44 and is located opposite the slide 59 or lever 59, so that the printing form 37 is aligned in its mounting direction M and thus also in the axial direction to the forme cylinder 33 (FIG. 8).
• a plurality of slides 59 or levers 59 can also be provided in the shaft 44, which can be advantageous in particular in the case of printing plates 37 of great length L.
• the forme cylinder 33 is also advantageously brought into a predefined position in accordance with the side register, by z. B. is zeroed with respect to the page register before the new printing form 37 is applied to it.
• the pivot axis of the lever 59 is preferably arranged perpendicular to the contact surface 02 of the printing form 37.
• the at least one lever 59 preferably intermittently engages laterally on the printing forme 37. B. by an adjusting means, in particular by a pneumatically operated adjusting means preferably against the force of a spring.
• the lever 59 is advantageously deflected in a pulse-like manner when it is employed, so that it only gives the printing form 37 a momentarily acting thrust, but that the printing form 37 is otherwise, for. B. can be moved freely in its mounting direction M. Since the lever 59 acts only briefly on the printing form 37, the printing form 37 can, if necessary, also be conveyed back into the shaft 44 without the lever 59 hindering a movement of the printing form 37 against its mounting direction M.
• the slider 59 or lever 59 is preferably activated for the purpose of aligning the printing form 37 when the printing form 37 is conveyed out of the shaft 44.
• the lever 59 can then press the printing form 37 laterally and align it in the axial direction to the forme cylinder 33, while the printing form 37 is in contact with the further stop 63.
• a lever 59 which is preferably laterally deflected by a pneumatically actuated adjusting means against a printing form 37 with a variable width B within certain tolerance limits, regardless of the actual width dimension of the printing form 37, the lever 59 is always the same amount of force applied to the printing plate 37.
• a rolling element 62 is placed against the forme cylinder 33 and a stop 63 is brought close to the forme cylinder 33 (FIG. 9).
• the rolling element 62 can consist of a plurality of rollers arranged side by side in the axial direction.
• the stop 63 which can also consist of several segments arranged side by side in the axial direction, is arranged in the mounting direction M of the printing form 37 in front of the rolling element 62 or next to the rolling element 62.
• the stop 63 has a bevel 64 facing the forme cylinder 33, the fictitious rectilinear extension of which intersects the lateral surface at an intersection C.
• an imaginary third tangent T3 lies on the lateral surface of the forme cylinder 33, with which the bevel 64 or its fictitious extension forms an acute angle ⁇ , which is open in the direction of the printing forme 37 brought up to the forme cylinder 33.
• the stop 63 can, for. B. be designed as a wedge, which is fixedly connected to a carrier for the rolling element 62.
• the leading end 03 of the new printing form 37 brought up to the forme cylinder 33 abuts the bevels 64 of the stop 63, as a result of which the printing form 37 is aligned with the forme cylinder 33.
• the previously described alignment of the printing form 37 with the levers 59 can likewise only take place at the end of the printing form 37 being transported out of the shaft 44, when the leading end 03 of the printing form 37 is already in contact with the stop 63.
• the leading end 03 of the new printing form 37 brought up to the forme cylinder 33 is fed to the lateral surface of the forme cylinder 33 in such a way that the hooked leg 13 bent at the leading end 03 stands pressed on the outer surface of the forme cylinder 33.
• the opening angle ⁇ 1 between the beveled suspension leg 13 and the elongated length L of the printing form 37 can be slightly reduced by the pressure exerted by the stop 63 on the leading end 03 of the printing form 37 in the direction of the forme cylinder 33. Since the one with the Opening angle ⁇ 1 of preferably 45 ° beveled hanging leg 13 at the leading end 03 a length 113 in the range of z. B.
• the leading end 03 of the printing forme 37 is located close to the outer surface of the forme cylinder 33 or close to one on the forme cylinder 33 in the contact point of the hanging leg 13th fourth tangent T4.
• the distance a37 is z. B. 2.5 mm to 6 mm.
• the rolling element 62 placed in connection with the stop 63 on the forme cylinder 33 has a radius r62 which is selected to be somewhat larger than the dimension of the distance a37.
• the radius r62 is z. B. in the range of 5 mm to 15 mm, preferably at 10 mm.
• the forme cylinder 33 is rotated so far that the hanging leg 13 of the printing form 37, bent at the leading end 03, can be set up in the production direction P of the forme cylinder 33 at a distance a09 behind the rear edge 16 of the opening 09 on the lateral surface of the forme cylinder 33 , wherein the distance a09 is less than an arc piece the length of a quarter, in particular an eighth of the circumference of the cylinder 06.
• the distance a09 is significantly smaller than the length of the circumference of the rolling element 62.
• a preferred embodiment provides that the leading end 03 folded-in hanging leg 13 of the printing form 37 is placed at a distance a09 from 5 mm to 10 mm behind the opening 09.
• the force FR directed radially to the forme cylinder 33 correlates with the pressure with which the leading end 03 of the printing form 37 is pressed against the forme cylinder 33.
• the pressure results from the contact pressure exerted by the stop 63 and can be increased by the dead weight FG of the printing form 37 or by the leading end 03 of the printing form 37 having an effective direction is elastically biased against the forme cylinder 33.
• the printing form 36 in the printing form magazine 38 arranged below the paper web 46 lies at least partially, preferably between 30% and 50% of its length L in the shaft 43 for providing the new printing form 36 , on a support 66 (FIG. 10), the printing form 36 being held on the support 66 preferably frictionally by its own weight. It is not necessary to use external energy to hold the printing form 36 on the support 66, e.g. B. by a vacuum pressurized suction device, which fixes the printing form 36 on the support 66.
• the support 66 can be moved by a third conveying device 67, which can be designed as a pneumatic linear drive and by means of which the new printing form 36 with its leading end 03 can be pushed against the forme cylinder 31, preferably increasing tangentially, against the force of gravity.
• the hanging leg 14 lies against the trailing end 04 of the printing form 36, preferably in turn against a stop 58, which can be attached or molded onto the support 66. If the printing form 36 is conveyed against the form cylinder 31 against the force of gravity, a means corresponding to the stop 63 can be dispensed with.
• the third conveying device 67 like the second conveying device 54, is therefore preferably designed as a translatory conveying device which executes a travel path.
• the hanging legs 13; 14 of the printing form 37 upwards and the printing form 37 can be arranged hanging in the shaft 44 by holding the hanging leg 14 attached to the trailing end 04 of the printing form 37 on the carriage 56 of the second conveyor device 54 (FIG. 7), while in the underneath the paper web 46 arranged printing form magazine 38, the hanging legs 13; 14 of the printing form 36 downwards, ie point to the support 66 for the printing form 36 (FIG. 10).
• a fourth conveying device 68 with an articulated, in particular pivotably mounted holding element 69 In particular, a pawl may be provided so that the holding element 69 hooks onto the hanging leg 14 of the trailing end 04 of a used printing form 36, which is unwound by the rotation of the forme cylinder 31 and pushed into the shaft 41, and preferably completely in by the movement of the fourth conveying device 68 the shaft 41 pulls (Fig. 11).
• the friction body 71; 72 and their abutments 73; 74 are in the shafts 43; 44 preferably perpendicular to the conveying direction of the printing forms 36; 37 arranged so that it on the printing plates 36; 37 applied contact pressure the respective printing form 36; 37 as with jaws in a defined manner, while the respective printing form 36; 37 from the rotating forme cylinder 31; 33 on the respective forme cylinder 31; 33 is raised.
• the fact that the new printing form 36; 37 against that of the friction body 71; 72 and abutment 73; 74 applied contact pressure on the respective forme cylinder 31; 33 is pulled up, the printing plate 36; 37 tighter on the forme cylinder 31; 33 on.
• the friction body 71; 72 a friction surface 76; 77, which is preferably smooth and of lower hardness than the surface of the printing plates 36; 37, the friction surface 76; 77 is facing.
• the friction bodies 71; 72 from a reversibly deformable hollow body, for. B. from a with a pressure medium, for. B. compressed air fillable hose, the hose made of an elastomeric material, for. B. is made of a rubber.
• the abutment 73; 74 can e.g. B. as one or more in the shafts 43; 44 attached rails can be formed from a plastic with a preferably slidable surface.
• the friction body 71; 72 can also on a z. B. in the shafts 43; 44 the printing formes 36; 37 promotional funding, z. B. the sled-shaped support 66 and at least one of the printing forms 36; 37 hold if necessary.
• the friction bodies 71; 72 also against one in the shaft 43; 44 conveyed printing form 36; 37 can be employed.
• the hollow bodies increase their volume and exercise on a pressure plate 36; 37 a surface pressure, the printing form 36; 37 on the rear side of one of the abutments 73; 74 is supported.
• the intensity of the surface pressure can preferably be controlled by the pressure medium. Since the elastomer material of the friction body 71; 72 and the Plastic of the abutment 73; 74 have a lower hardness than the printing forms 36; which preferably consist of a metallic material, in particular of an aluminum alloy; 37, is damage to the printing formes 36; 37 not to be feared if the printing forms 36; 37 with existing surface pressure from the shaft 43; 44 are drawn.
• the friction body 71; 72 and their abutments 73; 74 are in the shafts 43; 44 preferably close to the respective openings of the shafts 43; 44 arranged d. H. near the point where one in the shafts 43; 44 for mounting on the forme cylinder 31; 33 provided new printing form 36; 37 the respective printing forme magazine 38; 39 leaves.
• the friction body 71; 72 and their abutments 73; 74 are e.g. B. in the shafts 43; 44 parallel to the width B of the printing form 36; 37 arranged.
• the friction bodies 71; 72 can e.g. B. be stored in a strip 78 with a U-profile, the U-profile preferably on the printing plate 36; 37 facing side is open.
• the U-profile enclosing the hollow body on the side gives the hollow body stability and specifically directs its volume increase caused by the application of a pressure medium against the printing form 36; 37th
• An embodiment of the friction body 71; 72 provides (FIG. 13) that the hollow body extends over a width B of the printing form 36; 37 extending channel 79 is guided and the channel 79 spaced from each other to the printing form 36; 37 directed openings 81; 82 has, e.g. B. in particular two openings 81; 82, through which the hollow body exerts a surface pressure on the printing form 36; 37 can exercise. If the friction body 71; 72 than over the preferably entire width B of the printing form 36; 37 extending hollow bodies are formed, this ensures that when the hollow bodies are acted upon by a pressure medium, a uniform surface pressure over the preferably entire width B of the printing form 36; 37 results.
• the surface pressure is released by venting, in particular by vacuuming the friction bodies 71; 72 released, whereby the hollow bodies reduce their volume before the at the trailing end 04 of the printing form 36; 37 attached hanging legs 14 during the conveying out of the printing form 36; 37 from the shaft 43; 44 passes the point of surface pressure.
• the surface pressure is only effective for a short time.
• the printing form magazines 38; 39 in such a way that on each printing forme magazine 38; 39, only a single connecting element is provided, which bundles all the necessary connection lines in order to connect the printing form magazine 38; 39 depending on the units installed in it with electrical or other energy and to exchange control signals.
• pneumatic drives in the conveying devices 49, 54, 67 and 68 and other units electric drives and an electrical control can also be provided for these devices and units.
• Printing form Printing form Printing form Printing form magazine Printing form magazine

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
• Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
• Thermistors And Varistors (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=31501828

Family Applications (1)

Country Status (5)

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• 2002
  • 2002-08-21 DE DE10238123A patent/DE10238123A1/de not_active Withdrawn
• 2003
  • 2003-08-06 DE DE50311424T patent/DE50311424D1/de not_active Expired - Lifetime
  • 2003-08-06 AT AT03790681T patent/ATE428563T1/de not_active IP Right Cessation
  • 2003-08-06 AU AU2003260258A patent/AU2003260258A1/en not_active Abandoned
  • 2003-08-06 EP EP03790681A patent/EP1531993B1/fr not_active Expired - Lifetime
  • 2003-08-06 WO PCT/DE2003/002635 patent/WO2004020202A2/fr not_active Application Discontinuation

Non-Patent Citations (1)

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