JP6429737B2 - Offset printing machine - Google Patents

Description

  The present invention has a plate cylinder, an inking device having a plurality of inking device rollers and a plurality of gears for driving the inking device rollers, a plurality of dampening device rollers, and a plurality of gears for driving the dampening device rollers. And a dampening device.

  Patent Document 1 describes a printing machine in which all rollers of an inking device can be stopped while the cylinder of the printing device is continuously driven. Further, in this printing machine, the turning point of the horizontal swing roller can be adjusted with respect to the printing plate starting edge. For this purpose, the bearing journal is rotated via a servo motor. A planetary gear is rotatably supported on the bearing journal, and the planetary gear has two gear rims. One gear rim meshes with the inner tooth row of the first gear, and the other gear rim meshes with the inner tooth row of the second gear.

  Patent Document 2 describes a printing machine. The printing machine has a printing apparatus including a main driving device and an individual driving device. The main drive device is connected to the plate cylinder. The plate cylinder is coupled to a superimposed transmission that is connected to an individual drive.

German Patent Application Publication No. 19504426 German Patent Application Publication No. 10200901509

  The problem underlying the present invention is to provide another offset printing press.

  The above problem is solved by an offset printing machine having the features described in the characterizing portion of claim 1.

  An offset printing press according to the present invention drives a plate cylinder, a plurality of ink device rollers and an ink device having a plurality of gears for driving the ink device rollers, a plurality of dampening device rollers, and the dampening device rollers. A dampening device having a plurality of gears, a planetary gear transmission, and a planetary gear transmission having a plurality of components in the form of a hollow gear, a sun gear and a planet carrier, and an offset printing press A gear unit having a single gear or two gears arranged coaxially with each other, the gear unit being coaxially arranged on one of the components of the planetary gear transmission, and The inking device is coupled to the plate cylinder via a planetary gear transmission, and is connected to one of a plurality of gears of the inking device and a wet gear. And one gear of the plurality of gear devices, meshes with the gear unit.

  In another aspect, of the plurality of gears of the dampening device, the gear engaged with the gear unit is rotatably mounted on the counter shaft, and another gear of the plurality of gears of the dampening device is mounted. Is mounted on the countershaft so as not to be relatively rotatable.

  In another aspect, the gear of the dampening device that engages with the gear unit and is rotatably mounted on the countershaft can be coupled to the countershaft so as not to rotate relative to the countershaft. .

  In another aspect, of the plurality of gears of the dampening device, another gear that is non-rotatably mounted on the countershaft is engaged with another gear of the plurality of gears of the dampening device. Yes.

  In another aspect, the further gear is rotatably mounted on a shaft that is non-rotatably coupled to one of the plurality of components of the planetary gear transmission, and another switching clutch. Thus, the shaft can be coupled to the shaft so as not to be relatively rotatable.

  In another aspect, the constituent member of the planetary gear transmission in which the shaft is coupled in a relatively non-rotatable manner is a hollow gear, and the shaft is a hollow gear shaft.

  In another aspect, the motor is coupled to one component of the plurality of components of the planetary gear transmission.

  In another aspect, a component brake to which the motor is coupled and a fixed brake is provided to hold the motor in a stopped state.

  In another aspect, the component to which the motor is coupled is different from the component in which the gear unit is disposed coaxially and is coupled in a relatively non-rotatable manner.

  In another aspect, the component to which the motor is coupled is a sun gear.

  In another aspect, a flywheel is disposed in a force transmission path between the motor and the inking device roller.

  In another aspect, the component in which the gear unit is arranged coaxially and is coupled so as not to be relatively rotatable is a planetary carrier.

  In another aspect, the component in which the gear unit is coaxially arranged and coupled so as not to rotate relative to each other has a hollow shaft, and one shaft extends through the hollow shaft.

  In another aspect, the shaft extending through the hollow shaft is a sun gear shaft and is non-rotatably coupled to the sun gear.

  In another aspect, a fixed brake is provided that holds the inking device in a stopped state during operation.

  In another aspect, the fixed brake that holds the inking device in a rotation stopped state during operation includes the gear unit of the planetary gear transmission, in which the gear unit is disposed coaxially and is coupled so as not to be relatively rotatable. Acts on components.

  In another aspect, in the first mode of operation, one component of the plurality of components of the planetary gear transmission is coupled to one gear of the plurality of gears of the dampening device via a switching clutch. In the second operation mode, another constituent member of the plurality of constituent members of the planetary gear transmission is coupled to the same gear of the dampening device via another switching clutch. Both switching clutches are switching clutches already mentioned in the manner described herein above. Advantageously, the hollow gear is a component that is coupled in the first mode of operation, and the planet carrier is a component that is coupled in the second mode of operation. Both components are alternately coupled to the gear. A gear whose both components are connectable via a switching clutch meshes with another gear of the dampening device. This further gear is arranged coaxially with the dampening device roller and is connected so as not to rotate relative to it. Another gear may be a single gear that is fixedly attached to the dampener roller journal and is disposed in the journal.

  Advantageous further aspects will become apparent from the following advantageous embodiments and the description of the attached drawings.

It is the schematic of a printing machine.

  Only one drawing schematically shows a printing press 1 comprising a plate cylinder 2, an inking device 3 arranged corresponding to the plate cylinder 2, and a dampening device 4. The printing machine 1 is an offset printing machine. The plate cylinder 2 has an offset printing plate 5. The inking device 3 includes inking device rollers 6, 7 and a plurality of gears 8, 9, 10, 11 that drive the inking device rollers 6, 7. The dampening device 4 has dampening device rollers 12 and 13 and a plurality of gears 14, 15, 16 and 17 that drive the dampening device rollers 12 and 13.

  The gear 14 is a single gear mounted on the journal of the dampening device roller 13. However, the system described below is advantageous in that the first operating mode (slip operation) has a difference between the peripheral speed of the dampening roller 13 and the peripheral speed of the plate cylinder 2, such as It is possible to selectively operate the dampening device roller 13 in the second operation mode (synchronous operation) that does not have a difference. In order to realize this in terms of transmission technology, the system described does not require the second gear on the dampening device roller 13 journal.

  Another advantage of this system is that the dampening device roller 13 can be operated in the first mode of operation even when the inking device 3 is in a rotation stopped state, so that the dampening device roller 13 can be driven, for example, by slipping. Self-cleaning (scraping of particles) can be performed. For this reason, no additional direct drive for the dampening device roller 13 is required.

  The planetary gear transmission 18 includes a hollow gear 19, a sun gear 20, and a planet carrier 21 having a plurality of planetary gears 22. The hollow gear 19 is an external gear whose inner teeth are cut, and the sun gear 20 is an inner gear whose outer teeth are cut of the planetary gear transmission 18. The gear unit 23 includes a gear 24 and a gear 25. The gear 25 is disposed coaxially with the gear 24 and is coupled so as not to be relatively rotatable. Since the gears 24 and 25 are fixedly mounted on the hollow shaft 26 of the planet carrier 21, the gear unit 23 is disposed coaxially with the planet carrier 21 and is coupled so as not to be relatively rotatable.

  The inking device 3 is coupled to the plate cylinder 2 via a planetary gear transmission 18. The gear 8 of the inking device 3 is engaged with the gear unit 23 by the gear 8 meshing with the gear 24. The gear 17 of the dampening device 4 is engaged with the gear unit 23 by the gear 17 meshing with the gear 25. A sun gear shaft 27 for driving the sun gear 20 extends through the hollow shaft 26, and the sun gear 20 is fixedly attached to the sun gear shaft 27 in the same manner as the flywheel 38.

  The motor 28 is directly coupled to the sun gear shaft 27 as a direct drive, but may alternatively be coupled to the sun gear shaft 27 via a gear transmission. When the gear transmission described above is present, the flywheel 38 is not attached to the sun gear shaft 27 but is incorporated in the gear transmission and attached to one shaft of the gear transmission. Will.

  Since the flywheel 38 is designed in terms of geometry and mass so that the mass moment of inertia of the flywheel 38 exactly matches the mass moment of inertia of the inking device 3, the flywheel 38 has an advantageous form. Therefore, when the inking device 3 is stopped, the moment of inertia of the inking device 3 is canceled, and thereby the natural vibration frequency of the entire machine is maintained constant.

  The plate cylinder gear 29 is disposed coaxially with the plate cylinder 2 and is coupled so as not to be relatively rotatable. The plate cylinder gear 29 is fixedly attached to the shaft 30 of the plate cylinder 2. The gear 31 has helical teeth, and is rotatably mounted on the shaft 30 as a loosely fitted gear. The gear 31 can be coupled to the shaft 30 through a first switching clutch 32 so as not to be relatively rotatable. . In the switching position where the first switching clutch is engaged, torque is transmitted from the gear 31 to the shaft 30, and in the opened switching position, the gear 31 rotates on the shaft 30 and torque is transmitted to the shaft 30. There is no.

  The hollow gear 19 and the gear 33 are fixedly attached to the hollow gear shaft 34. A gear 15 is rotatably mounted on the hollow gear shaft 34 as a loose fitting gear. The gear 15 can be coupled to the hollow gear shaft 34 through the second switching clutch 35 so as not to be relatively rotatable. The gear 33 meshes with the plate cylinder gear 29.

  Alternatively, the plate cylinder gear 29 may be omitted, and the gear 33 may be provided with a helical tooth row so that the gear 33 meshes with the gear 31.

  Countershaft 36 (Note: if the force transmission path extends from the first shaft through the second shaft to the third shaft aligned with the first shaft, the intervening second The shaft is also called a countershaft), and a gear 17 is fixedly mounted, and the gear 16 is rotatably mounted as a loose fitting gear. The countershaft 36 extends in parallel with the sun gear shaft 27 and the hollow gear shaft 34. The gear 16 can be coupled to the countershaft 36 through a third switching clutch 37 so as not to be relatively rotatable.

  The first fixing brake (English: fixing brake) 39 prevents rotation of the sun gear 20, the sun gear shaft 27, and the motor 28 in the operating state. The first fixed brake 39 may be incorporated in the sun gear 20 and is activated during the printing operation. The first fixed brake 39 advantageously enables the motor 28 to be stopped during the printing operation without energizing the motor 28, thereby saving electrical energy.

  The second fixed brake 40 is operated to hold the inking device 3 in a stopped state during operation of the printing press 1. The second fixed brake 40 may be incorporated in the planet carrier 21 or may otherwise act on the countershaft 36. In the latter case, the second fixed brake 40 acts on the planet carrier 21 via the gears 17 and 25 in order to keep the planet carrier 21 in a rotation stopped state.

  The following non-illustrated embodiments are also possible.

  The plate cylinder gear 29 may be disposed on the shaft 30 as a loose fitting gear, and can be coupled to the shaft 30 through a fourth switching clutch so as not to be relatively rotatable. In this aspect, in addition to the main motor (not shown) and the motor 28, another motor may exist as an individual drive device for the plate cylinder 2, for example, as a direct drive device.

  In another embodiment, the gear unit 23 has only a single gear, and not only the gear 8 of the inking device 3 but also the gear 17 of the dampening device 4 meshes with the single gear. This aspect can be realized, for example, by integrating the gears 24 and 25 into a very wide single gear.

  The illustrated system functions as follows: During the printing run, the motor 28 is stopped. The main motor drives the plate cylinder 2 and its plate cylinder gear 29 to rotate when the first switching clutch 32 is fastened via a gear (not shown) that meshes with the gear 31. The plate cylinder gear 29 meshes with the gear 33 and transmits torque to the gear 33 and thus to the hollow gear shaft 34. The hollow gear shaft 34 transmits torque to the gear 14 meshed with the gear 15 via the gear 15 when the second switching clutch 35 is engaged. The gear 14 is fixedly attached to the shaft of the dampening device roller 13 and transmits torque to the dampening device 4. The dampening device rollers 12 and 13 of the dampening device 4 are rotationally coupled to each other via a gear transmission (not shown) or via roller peripheral surface friction.

  Further, the hollow gear shaft 34 transmits torque to the planet carrier 21 through the hollow gear 19. The planet carrier 21 transmits torque to another shaft on which the gear 9 and the gear 10 are fixedly mounted via the gear 24, the gear 8 meshing with the gear 24, and the gear 9 meshing with the gear 8. To do. From this other shaft, the torque is transmitted to the inking device rollers 6 and 7 of the inking device 3 via the gear 10 and the gear 11 meshing with the gear 10. The inking device rollers 6 and 7 are rotationally coupled to each other via a gear transmission (not shown) or via roller peripheral surface friction.

  The one or more inking device rollers 6 and 7 are laterally oscillating rollers that reciprocate in the axial direction during a printing operation. The reciprocating motion of the horizontal roller has a prescribed phase relationship with respect to the rotational movement of the plate cylinder. For example, the horizontal roller is always in the reciprocating motion of the plate cylinder 2 at the defined rotational angle position. It reaches a turning point. For reasons of printing technology, the horizontal roller reaches this turning point at another rotational angular position of the plate cylinder 2 and therefore a so-called horizontal phase shift or a so-called point-of-use shift of the horizontal roller must be carried out. May be necessary. The lateral phase shift can be performed while the printing operation is in progress by releasing the first fixed brake 39 and activating the motor 28, thereby driving the sun gear 20.

  In the planetary gear transmission 18, the rotation of the hollow gear 19 driven by the main motor and the rotation of the sun gear 20 driven by the motor 28 are superimposed. In this case, the planetary gear transmission 18 includes a superposition transmission device (note: a superposition transmission device differs from a differential transmission device having a single input motion and two output motions resulting from the input motion) It has a drive or input movement and a single driven or output movement resulting from the superposition of these movements, both transmission types, ie superposition transmission and differential transmission, are planetary gear transmissions As a device).

  The driven movement or output movement is carried out by the planet carrier 21. The planet carrier 21 rotates at a rotational speed resulting from both drive movements or both input movements. In order to shift the lateral phase position, the resulting rotational speed can be changed by changing one input rotational speed, i.e. the rotational speed of the motor 28 and thus the rotational speed of the sun gear 20, to the other input rotational speed, i.e. the main motor. , And thus the rotation speed of the hollow gear 10 can be changed while being constant.

  Since the reciprocating motion of the horizontal swing roller is driven by the planetary carrier 21 via a horizontal swing transmission device (not shown), the horizontal swing transmission with respect to the rotational angle position of the plate cylinder 2 by the temporary operation of the motor 28. The rotational angle position of the device can be changed and thus the lateral phase position can be changed.

  Another mode of operation is possible in which the motor 28 is controlled so that the rotational speed of the sun gear 20 occupies a predetermined magnitude. As a result, the rotational speed of the planetary carrier 21 resulting from the superimposition of the rotational speed of the sun gear 20 and the rotational speed of the hollow gear 19 is zero, so that the inking device 3 and the dampening device 4 are stopped. On the other hand, other printing presses continue to operate.

  Another operation mode is a cleaning operation. The cleaning operation can be performed with the main motor stopped according to the first aspect and with the main motor operating according to the second aspect.

  In the first mode, one of the planetary gear transmissions 18 has an input rotational speed, that is, the rotational speed of the hollow gear 19 is zero, and the other input rotational speed, that is, the motor 28, and thus the rotational speed of the sun gear 20 is changed. The resulting rotational speed of the planet carrier 21 and thus the inking device 3 is adjusted to an optimum size for cleaning the inking device 3.

  In the second aspect, the rotational speed of the hollow gear 19 is greater than zero, and the motor 28 is controlled depending on the main motor. In this case, the rotational speed of the hollow gear 19 in the planetary gear transmission 18 and the sun gear 20 are controlled. Based on the superposition of the rotation number of the planetary carrier 21, an optimum rotation number for cleaning the inking device 3 of the planet carrier 21 is generated.

  As in the second mode of the cleaning operation, the rotation speed control of the inking device 3 is also performed during pre-inking performed during the printing operation. During pre-inking, ink is fed from the ink groove of the inking device to the portion of the inking device 3 that is placed behind the ink groove. This part has no ink in advance and has just been washed, for example. Such pre-inking can be performed in a passive printing section. A passive printing unit transports a sheet of paper during operation of the printing unit, but does not print and is adjusted for subsequent print jobs, whereas the active printing unit of the printing press. Transports a sheet of an ongoing print job and prints it at that time.

DESCRIPTION OF SYMBOLS 1 Printing machine 2 Plate cylinder 3 Inking apparatus 4 Wetting apparatus 5 Offset printing plate 6 Inking apparatus roller 7 Inking apparatus roller 8 Gear 9 Gear 10 Gear 11 Gear 12 Wetting apparatus roller 13 Wetting apparatus roller 14 Gear 15 Gear 16 Gear 17 Gear 18 Planetary gear transmission 19 Hollow gear 20 Sun gear 21 Planet carrier 22 Planetary gear 23 Gear unit 24 Gear 25 Gear 26 Hollow shaft 27 Sun gear shaft 28 Motor 29 Plate cylinder gear 30 Shaft 31 Gear 32 First switching clutch 33 Gear 34 hollow gear shaft 35 second switching clutch 36 counter shaft 37 third switching clutch 38 flywheel 39 first fixed brake 40 second fixed brake

Claims (17)

Plate cylinder (2),
An inking device (3) having a plurality of inking device rollers (6, 7) and a plurality of gears (8-11) for driving the inking device rollers (6, 7);
A dampening device (4) having a plurality of dampening device rollers (12, 13) and a plurality of gears (14-17) for driving the dampening device rollers (12, 13);
A planetary gear transmission (18),
Hollow gear (19),
Sun gear (20) and planet carrier (21)
A planetary gear transmission (18) having a plurality of components (19-21) in the form of
A gear unit (23) having a single gear or two gears (24, 25) coaxial with each other, one of the plurality of components (19-21) of the planetary gear transmission (18) A gear unit (23) disposed coaxially with the two component members (21) and coupled in a relatively non-rotatable manner;
With
The inking device (3) is coupled to the plate cylinder (2) via the planetary gear transmission (18),
One gear (8) of the plurality of gears (8-11) of the inking device (3) and one gear of the plurality of gears (14-17) of the dampening device (4) (17) is engaged with the gear unit (23), and is an offset printing machine. The dampening device of the plurality of gears (14-17) of (4), the gear (17) engaging the gear unit (23) is mounted immovably to the counter shaft (36), The offset gear according to claim 1, wherein another gear (16) of the plurality of gears (14-17) of the dampening device (4) is rotatably mounted on the countershaft (36). Printer. The damping unit (4) said plurality of gears (14-17) of said another gear which is rotatably mounted in front Symbol countershaft (36) (16) is switched clutch (37) The offset printing press according to claim 2, wherein the offset printing press can be coupled to the countershaft (36) in a non-rotatable manner. Of the plurality of gears (14-17) of the dampening device (4), the other gear (16) rotatably mounted on the countershaft (36) is connected to the dampening device (4). 4. The offset printing press according to claim 3, which meshes with a further gear (15) of the plurality of gears (14-17). The further gear (15) is attached to a shaft (34) in which one component member (19) of the plurality of component members (19-21) of the planetary gear transmission (18) is fixedly mounted. The offset printing press according to claim 4, wherein the offset printing press is rotatably mounted and can be coupled to the shaft (34) in a non-rotatable manner by another switching clutch (35). The planetary gear transmission (18), the shaft (34) mounted immovably the said component (19) is the hollow wheel (19), said shaft (34) is a hollow gear shaft (34 The offset printing press according to claim 5, wherein   The motor (28) according to any one of claims 1 to 6, wherein the motor (28) is coupled to one component member (20) of the plurality of component members (19-21) of the planetary gear transmission (18). The offset printer according to item 1.   The offset printing press according to claim 7, wherein the component (20) to which the motor (28) is coupled and a fixed brake (39) for holding the motor (28) in a rotation stopped state are provided. .   The structural member (20) to which the motor (28) is coupled is different from the structural member (21) in which the gear unit (23) is coaxially disposed and coupled so as not to be relatively rotatable. The offset printing press according to claim 7 or 8.   The offset printing press according to claim 9, wherein the component (20) to which the motor (28) is coupled is the sun gear (20).   The offset printing according to any one of claims 7 to 10, wherein a flywheel (38) is arranged in a force transmission path between the motor (28) and the inking device roller (6, 7). Machine.   The component member (21) in which the gear unit (23) is arranged coaxially and is coupled so as not to be relatively rotatable is the planetary carrier (21). The offset printing machine described.   The component member (21) in which the gear unit (23) is disposed coaxially and is coupled so as not to be relatively rotatable has a hollow shaft (26), and one member is provided through the hollow shaft (26). 13. The offset printing machine according to claim 1, wherein the shaft (27) extends.   The offset printing press according to claim 13, wherein the shaft (27) extending through the hollow shaft (26) is a sun gear shaft (27) and is coupled to the sun gear (20) in a non-rotatable manner.   The offset printing machine according to any one of claims 1 to 14, further comprising a fixed brake (40) for holding the inking device (3) in a rotation stopped state during a printing operation.   The fixed brake (40) that holds the inking device (3) in a rotation stopped state during a printing operation is the gear unit (19-21) of the planetary gear transmission (18). The offset printing press according to claim 15, wherein 23) acts on a component (21) arranged coaxially and connected in a relatively non-rotatable manner.   In the first operation mode, one constituent member (19) of the constituent members (17-21) of the planetary gear transmission (18) is connected to the dampening device (4) via a switching clutch (35). ) Of one of the components (17-21) of the planetary gear transmission (18) in the second operation mode. The offset printing press according to claim 1, wherein another component (21) is coupled to the same gear (15) of the dampening device (14) via another switching clutch (37).

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