CS218000B2 - Sheet rotation printing machine - Google Patents

Description

CZECHOSLOVAK SOCIALISTIC

(19)

DESCRIPTION OF THE INVENTION

FOR PATENT 218000 (11) (BI)

(22) Registered 17 06 72 (21) (PV 3360-72). (32) (, 31) (33) Priority from 27 0i5 71 (P 21 2,6 258.8) Federal Republic of Germany (51) Int. Cl.3B 41 F 5 / 02B 65 H 5/14 (40) Published 30 06 82

OftAD FOR INVENTIONS (45) Released 15 01 85 (72) (73)

The inventor WEISGERBER WILLI, JOHANNISBERG / RHEINGAU (NSR) and the patent owner (54) Sheet Rotary Printing Machine 1

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-fed rotary printing machine, with a device for adjusting the opening time of the gripper sets, with at least two printing kits interconnected by either three transfer rollers or a single transfer roll.

Printing machines of this kind are known, which can be used for either two-color or multi-color printing on one side, as well as for face and back printing in one or more colors, with certain machine adjustments being required. The known machines of this displaceable type have, in the first instance, a single-disc transfer roll equipped with two opposing sets, and in the second case a half-turn pressure cylinder equipped with two opposing sets of catchers and a single also a half-turn transfer roll equipped with opposite double sets of catchers. The third one-turn transfer roller in the first case has one double set of catchers.

The sheet is passed either for printing in the following printing kit, in the previously printed page of the previously printed page, in two-color or multi-color printing with the middle transferable rolling die by a conventional transfer method to one set of double-set grippers. the following third transfer roller, in the second case, from one transfer roller to a set of print roller catchers the following printing sets, or to print in the following print set, back side, back and front prints per set of double set of transfer roller traps, in the other a second edge for one set of double set trays of a single transfer roll, so that each set of grasping center transfer roll or in the second case of the printing roll only opens when the trailing edge the sheet has reached contact o a point between the center and third transfer rollers, or between the print roll and the single transfer roll. Thus, in the case of the first two-color printing, the third transfer roll or the single transfer roll assumes the front edge of the sheet, which has been printed in the first or previous print set, but in the case of the front and back prints, accepts the back edge of the print which has been printed in the first or previous press kit.

The sheet rotary printing presses of this type have a device for adjusting the opening time above the hold of the medium roll or the press roll, both for the purpose of adjusting the aforementioned operation with a two-color or a few 218000 218000 kai in the second place. a different kind of work in the face and back printing, and vice versa, this adjustment requires a considerable shift in the opening time by the length of the print to be printed, and in the second method of working in the face print to adjust to different lengths archu. The desired change in the opening time of the middlings of the 'transfer' rollers or the roll of rollers is larger, the longer the format to be printed. In the known sheet-type rotary printing machines of this displaceable structure, two displacement cams are used for both displacement options, that is to say for two-color printing, on the one hand for face and back printing, of which the cam, which is used for two-color printing, is can only be set in a completely limited range, but otherwise stationary, while the other cam is circumferentially adjustable. For example, such an arch-type rotary printing machine is described in the description of the invention for the German patent. 1 10 (7 246. It is necessary for the opening cylinder used in the two-color printing to be rendered inoperative when adjusted to face and rubbing, which is achieved in the known machine by rotating the cam and the corresponding control means for turning The second cam, which is used in the face-to-face printing, is relatively uncomfortable, still in operation, even when the printing machine is in two-color printing, but not in any case. thus, closing the set of grippers with this second cam has no operational effect, but has the disadvantage that opening closing operations are completely redundant, and thus results in a set-up (two-color printing, unnecessarily worn out of all components that will take part in the opening and closing of the set of catchers, ie cams, cam followers, shaft catchers , Relevant rusk bearings etc. The invention aims to eliminate popsanénevýhody known structures and simultaneously (while simplifying and facilitating facial rub-and-printing setting it on a printing press different lengths formats to be printed with the appropriate NY.

This object has been achieved by the invention of a sheet-fed rotary printing machine with a device for adjusting the opening time of the gripper sets with at least two sets of kits connected by at least one catching roller provided with at least (two separate sets of grippers for transferring the sheet to the transfer roll, which is transmitted beyond the printing task in the subsequent printing set by additional coloring or multi-color printing on the front of the transfer roll catcher set, or to print the back side thereof with the print and back prints in the next press set, the trailing edge of another set of the transfer roller catchers, and that each set of catchers of the catch roll opens only when the rear edge of the sheet reaches a point of contact between the catch roll and transfer roll, the apparatus for adjusting the opening moment of the set Catcher Catchers ï for the adjustment of the printing machine from two- or multi-color prints to the face and the rubbing, or to the adjustment of the printing machine: different lengths of sheets at face and rubbing, the essence of which is that a fixed second control cam is provided on the catcher, for catching the catcher catcher in transferring the sheet a second transfer roller, together with a segment of the ring gear fixedly connected to the second control cam, the second control cam and the ring gear segment being disposed on the catch roll pin! and corrected for collapsing in any filmed position. Further, according to the invention, the toothed tooth segment fixedly connected to the second actuator is engaged with a gearwheel fixed at one end of the adjusting shaft, in which the handwheel is mounted on the other end, outside the frame, with a scale for locking the device at adjusting the opening time The gripper set is a toothed segment supported by a pivotable pivot located outside the connecting axis of the gripper and the shaft of the adjusting shaft, in the toothed segment there is a longitudinal control pivot in which an eccentric endplug of the housing is coaxial with the adjusting shaft, , an adjusting lever is provided, adapted to be arranged in the pivoting and inward position of the external toothing of the toothed rim, while the hub of the toothed segment is supported on the eccentric endcap of the housing and supported by a push spring. Also, according to the invention, the second control cam (the toothed-tooth segment is supported on a fixed adjustable end stop when set to a double-skin printing).

Still further according to the invention, the first transfer roll is adapted to receive the sheet from the first printing roll and pass it to the second transfer roll over the catch roll. (Finally, according to the invention, the catch roller is currently provided as a printing cylinder of the first printing set and has a single transfer roller arranged.

According to the invention, the two cams used in the known machine designs, one of which is a cam, are merged into a single cam, which can be circumferentially shifted to the air required to convert the two-color print to face and back prints. This displaceability is associated with (the possibility of adjusting the cam in the second mode of operation in the face and back prints, the different length dimensions of the sheets to be printed. This eliminates the need to remove the cams used for the two-color printing in the known printing machine designs). in addition to the face and back print, all the components needed to enable the first cam to be disengaged are removed, and, in addition to the two-color print setting, additional, unnecessary continuous operation of the overall actuator set control mechanism is omitted. According to the invention, only one cam is used, including the adjustments of the printing machine, thereby eliminating the additional wear of all components cooperating with the opening and closing of the sets of sets at each rotation speed or single transfer roller. for connecting and disconnecting the cam used for the two-color printing, and that the means for adjusting from the two-color printing to the face and back printing as well as the device for adjusting the cam in the face print are not separated but rather replaced by a single device, the whole construction of the machine will be greatly simplified, making it cheaper and less prone to failure.

The machine adjustment is thus greatly simplified for machine operators, setting errors are avoided, and considerably shorter times are reduced.

To rotate the toothed ring segment connected to the cam, which actuates the opening sets of the knob when transferring the sheet to an additional roller, a toothed rack is provided which is connected by a shaft to the outside of the machine housing located by an additional divider, for example a handwheel. coupled to an adjustment scale for the length of the ark, while for the arrest, a toothed segment is defined which can be rotated about an axis offset: with respect to the axis of the shaft, to rotate the o-segment, and positioned outside the connection between the axis of the shaft and the axis of the second transfer roller, or the pressure cylinder, and whose engagement with the external toothing of the gear ring segment can be engaged or disengaged such that the segment has an elongated aperture in which the eccentric end portion of the casing surrounding the coaxially mentioned play -del, by which a special control element, for example a lever, can snap into two positions, can be rotated in two stationary positions, the toothed segment being supported on the exciter housing part with a certain clearance and being pressed radially outwardly by the compression spring. This does not allow for a continuous but pitch toothing of the toothed ring segment and the toothed segment corresponding to the stepwise adjustment of the opening of the set of knobs or sets of the transfer roller, but this is not disadvantageous since the accuracy of the moment of opening of the knobs is not accurate when set to face and rubbing. so important. As a result, only a stepped adjustment corresponding to the tooth spacing is sufficient. Of course, it would also be possible to transfer this adjustment continuously to the clamping device; however, the described construction is particularly simple, inexpensive, and thus technically advantageous. For adjusting from two-color printing to face and back prints or vice versa, it is now only necessary to bring the rotating part of the housing or lever from one end position to the other, whereby the toothing of the toothed segment is moved away from the toothing of the ring gear observe both the adjustment from the two-color print to the face and back print, as well as the adjustment of the format of the face and back print format with an element that is located outside the machine connected to the gear wheel which engages with the tighter teeth! gear ring segment. The fact that the toothed segment is supported by an eccentric end portion of the housing with a play that is pushed radially outwardly by the spring force ensures that the toothed segment is accurately engaged and will assume a fixed position as if he was free-will.

For circumferentially adjusting the segment of the toothed rim serving outside the machine, an adjusting piece, for example a handwheel, is attached to the adjustment scale, according to which the adjustment to the face and back prints is carried out without testing the setting to the desired format length. To adjust the cam or rigidly coupled ring gear segment to the two-color t-sk, a purposeful, non-resettable end stop is attached for a one-time adjustment. It is also possible to return the print settings to the face and back prints and return to the one-shot, two-color print position by simply scrolling to this end stop and locking the device. An embodiment of the invention will now be described in more detail with reference to the drawings, in which: FIG. 1 schematically shows a sheet-fed printing press equipped with two pressure sets, with two between the two printing sets interconnected by the transfer rollers; to two-color. The plate cylinder, rubber cylinder, pressure cylinder as well as the first and second transfer rollers are single-turn, while the intermediate transfer roll has a double diameter, and is still half-turn, FIG. Fig. 3 is a cross-sectional view taken along line III-III of FIG. Fig. 4 is an elevational view of the adjusting device of the arrow IV of Fig. 3, and Fig. 5 schematically illustrates a device according to the invention for the construction of a sheet rotary printing machine whose printing cylinder of the first printing set, the only one carries the cylinder and the second printing set has a double diameter against the plate rollers and the rubber rollers of the first and second printing kits. The plate and rubber rollers are single-turn, while the rollers and the single rollers are half-turn rollers.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, the sheet S is intended to be printed in a sheet-fed rotary printing machine, also shown in a cut-out of 218,000 shots, comprising two printing kits, a first printing set 1 and a second printing set 2. The first printing set is 1 set from a first plate cylinder 5, a first rubber cylinder 4, a first press cylinder 3, and a first transfer cylinder 6 which contacts the holding cylinder 7, a second transfer cylinder 8 of the second printing set 2, further comprising a second printing cylinder 8, 9, the second rubber cylinder 10 and the corresponding second plate cylinder 11 are provided. The first transferring element 6 is provided with a gripper 12. The gripper 13 is provided with grippers 13, a bearing on the shaft 13 a. the gripper 14 for actuating the shaft 13 of the grippers 13. At the front of the gripping roller 7, a first gripper control cam 13 is provided which controls opening and closing the gripper 13 of the gripping roller 7 when transferring the sheet to be printed from the first transfer roller 6. The position of the control cam 13 is invariable, irrespective of whether the sheet rotary machine is aligned to a two-color or face and backing. Taking the front edge of the sheet S to be printed from the first transfer roll 6 takes place in both the machine and the same time at the same time. When adjusting the sheet rotary double-color printing machine, the sheet S is transferred by the first transfer roller retainers 12 in a conventional manner to the catchers 13 of the catching roller 7 and transferred therefrom to the second transfer roller catchers 32, which are intended for two-color printing. The second transfer roller catcher 32 then passes the front edge of the sheet with the catchers 34 of the second impression cylinder 9 of the second printing set 2.Arch S is printed on both sides 1, 2 twice on the same side. 2, the sheet S is also transmitted from the catchers 12 of the first transfer roller 6 to the catchers 13 of the catching roller 7, but the front sheet of the sheet S extends across the drawbar tangent. The roll 7 and the second transfer roll 8, and only the rear edge thereof is transferred to the gripper 33 intended for face and back printing located on the second transfer roll 8 of the second printing set 2, whereby the sheet S to be printed is turned. other side. The grippers 33 then pass in the known manner the rear edge with the gripper 32 of the second transfer roller 8 of the second printing set 2, and therefrom the sheets S to be printed are normally transferred to the grippers 34 of the second printing cylinder 9 of the second printing set 2. The sheet S is printed thereon. on the opposite side than that printed in the first printing kit 1.

On the catching roller 7, in the working rotary printing press, there is a stationary cam 18 which controls the opening and closing of the catchers 13 when transferring the sheet S over the second transfer roll 8 supported by a fixedly connected toothed belt segment 19 with external toothing rotatably about the axis The external toothing of the toothed ring segment 19 is engaged with the toothed wheel 26, which is connected by an adjusting shaft 25 with a handwheel 27, to control the circumferential positioning of the segment of the toothed ring 19, and the cam 18. In the handwheel 27 (FIG. 4), a step 28 is provided for adjusting the second control 18 to different lengths of the arch format to be printed when the machine is set to face and back prints. the collar 19, and thus the cam 18 to adjust the two-color printing machine, is obtained with a stop 20 (FIG. 1), followed by the arrestment of the toothed rim 19 in the manner described below. The stop 20 is adjustable, and in the two-color print, the exact moment of transfer can be set in accordance with FIG. In addition, the first actuating cam 13a and the second actuating cam 18 have longitudinal openings through which the fastening screw passes, thus allowing the base position of the rotary machine to be adjusted.

As shown in FIG. 3, the adjusting shaft 25 extends coaxially through the housing 24, which carries an annular segment 21 for locking the segment of the toothed rim 19 and thus the cam 18, which gear 21 is supported rotationally about an axis that is offset 1 with respect to the pivot shaft 25 of the pivot wheel 50 lying outside the connecting axis of the adjusting shaft 50 and disposed off the connecting line between the axis of the pivot shaft 50 and the axis of the pivot cylinder 7. The engagement of the pinion segment 21 about the axis 50 is done by that the toothed segment 21 has a longitudinal opening 51 in which an eccentric end pin 52 of the housing 24 is provided, which has an adjusting lever 30 with a handle 29 at its end outside the housing of the tool, with a locking pin 31. If the pin 30 is rotated by 180 ° from position " a " 4, to the position "b", the toothed segment 21 comes out of engagement with the segment of the toothed rim 19 and the toothed ring segment 19 can then be rotated freely.

In order for the toothed segment 21 to be able to snap back into engagement with the segment of the clamped rim 19 after the subsequent backward movement of the adjusting lever 30, 180 ° serving to restrain it, the toothed segment 21 is placed on the eccentric end pin 52 of the casing 24 s and is pressed approximately radially by the compression spring 23 radially outwardly. In this way, the position of the toothed segment 21 can be corrected, it is not entirely accurate to the segment of the toothed rim 19. This also ensures absolutely free play. In addition, FIG. 3 shows the usual first drive face pin 49 of the catching roller 7, which is connected by bolts 41 with its pin, and the usual second spur gear 42, which is connected by clamps 43 and bolts 44 with first end wheels 40. Pawl pins 45 are provided on the second spur gear 42

Claims (5)

218000 10 with spring 46 and handle 47 for pulling and releasing latch pin 45. FIG. 5 illustrates an embodiment of the invention for use in sheet-fed rotary printing machines, the two printing rollers, the first printing roller 3 and the second the printing press 9 of the two adjacent printing kits, the first printing kits 1 and the second printing kits 2 have twice the diameter of the rubber 4, 15 and: plate rollers 5, 11 of the first printing set 1 and the second printing set 2. the transfer used by the roller 7 'has a double diameter, equal to the diameter of the printing rollers 3, 9. For two-color printing, the printing cylinders 3, 9 and the transfer roller 7 ném of the double diameter would not be required. To adjust the machine to a two-color printing, in which the second control cam 18 is to always have the same position, the sheet-fed printing press has a stop 20 (FIG. 1) which is usually set only once to set the correct time of handover of the sheet S from the catching roller 7 to the second transfer roll 8. After the adjustment has been made, it is sufficient for the operator to: to set back the two-color printing up to this stop 20 by turning the handwheel 27 and then again positioning it arrests. PRIEDMĚT A sheet rotary printing machine with a device for adjusting the opening time of the gripper sets with at least two printing sets connected by at least one gripping roller provided with at least two separate gripper sets for supplying the grip to the transfer roll, wherein the sheet is fed for printing in a downstream printing set with another color in the double-front or multi-color printing with the front edge of the transfer roller catchers, or to print its back side in the upstream and downstream prints in the next print set with the back edge of the other set of bugs. that the catch rollers each open until the rear edge of the sheet reaches a point of contact between the catch and transfer roll, the apparatus for adjusting the opening time of the catch roll catcher sets either to adjust the printing machine from the bottom, or víceba or printing apparatus for different lengths of sheets in face-to-face printing, characterized in that a fixed second control cam (18) is provided on the catch roll (7) to control the opening of the catchers (the catch roll). (7) in transferring the sheet (S) to the second transfer roller (8, T) together with the toothed ring segment (19) rigidly connected to the second control cam (18); (19) are pivotally mounted on a pin of the catch cylinder (7) and adapted to be secured in any rotational position. A sheet-type rotary printing machine according to claim 1, characterized in that the segment of the toothed rim (19) fixedly connected to the second steering cam (18) is engaged with the tooth. fixed to one end of the adjusting shaft (25), at its second end, outside the machine frame, a turnwheel (27) with a graduation (28) is fastened and the device is adjusted to adjust the moment of opening of the catcher sets (13) a toothed segment (21) supported by a pivotable pin (50) lying outside the connector of the retaining cylinder (7) and the axis of the adjusting shaft (2i5j and a longitudinal actuating opening (51) in the toothed segment (21) in which an eccentric end pin (52) of the housing (24) coaxial 1 with the shaft (25) is mounted, at which end an adjusting lever (30) is fixed on the outside of the machine frame, provided with two securing and outer toothing positions the toothed section (19) into the frame and beyond, the hub of the toothed segment (21) being supported on the eccentric end pin (52) of the clearance housing (24) and supported on it by a compression spring (23). Sheet printing machine according to claim 1, characterized in that the second actuating cam (18) mounted on the segment of the toothed rim (19) is supported on a fixed adjustable end stop when set to two-color printing ( 20). 4. Sheet-fed rotary printing machine according to 1, with one catching roller and two grabbing! characterized in that the first transfer cylinder (6) is provided to pass the sheet (S) between the first printing cylinder (3) and the second transfer cylinder (8) in front of the holding cylinder (7). 5. A sheet-metal rotary machine according to claim 1, characterized in that the holding cylinder (7) is presently provided as a printing cylinder of the first printing set (1) and that a single transfer cylinder (7) is provided. 4 sheets of drawings