JP2014117825A - Device for switching phase of plate cylinder in printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for switching a phase of a plate cylinder in a printing machine in which the phase of the plate cylinder can be aligned with high accuracy.SOLUTION: The device is configured such that the phase of each plate cylinder 1 is switchable between a first rotational state in which the plate cylinders 1 are rotated in different print phases and a state in which the plate cylinders 1 are rotated in the same phase by transmitting or intercepting a driving force from a driving source by a driving force transmission part. The driving force transmission part includes: a driving side transmission part 61 driven and rotated irrespective of a plate cylinder shaft 1c by receiving a driving force; a first driven side transmission part 62 including a first engaged part 62a engaged with a first engagement part 61a provided to the driving side transmission part 61; and a second driven side transmission part 63 including a second engaged part 63a engaged with a second engagement part 61b which is provided to the driving side transmission part 61. Adjusting means H is provided between one driven side transmission part 63 among two driven side transmission parts and the plate cylinder shaft 1c.

Description

  In the present invention, the phase of the plate cylinder is the same as in the first rotation state in which the plate cylinder is rotated at a printing phase in which the phase of the plate cylinder of the printing unit is different due to transmission or interruption of the driving force to each plate cylinder axis of the driving force transmission unit The present invention relates to a plate cylinder phase switching device for a printing press that is configured to freely switch the phase of each plate cylinder to a second rotation state in which the plate cylinder is rotated at the same phase.

  In the printing machine, a plate cylinder is provided in each of a plurality of printing units arranged sequentially in the sheet transport direction. Each plate cylinder is arranged with a different phase in the circumferential direction (rotation direction) for convenience of sheet printing position in the transport direction.

  In some cases, the plate cylinders arranged in these different phases are positioned in the same phase. For example, it is the case where all the plate cylinders are replaced at the same time, the case where the plate clamping device is cleaned at the same time, or the case where maintenance work is performed. Patent Document 1 discloses a technique related to a driving device including a switching device that switches all plate cylinders from different phases to the same phase.

Japanese Patent Laid-Open No. 2004-351692

  In the configuration of Patent Document 1, when the phases of all plate cylinders are switched from different phases to the same phase, first, the clutch is disengaged and the driving force from the drive motor is transmitted to all the cylinders of all the printing units. Shut off. Thereafter, the rubber cylinder gear is driven and rotated by the driving force of a dedicated motor for driving each plate cylinder. The driving force of the rubber cylinder gear is transmitted to the plate cylinder driving gear via the differential gear mechanism, and the plate cylinder is driven to rotate. At this time, based on the signal from the encoder connected to the rotating shaft of the dedicated motor, it is confirmed that the plate cylinder is positioned in the same phase, and the driving of the dedicated motor is stopped at that position.

  As described above, in the configuration provided with a large number of gears constituting the rubber cylinder gear, the plate cylinder driving gear, and the differential gear mechanism, there is play (backlash) in the meshing of the gears, so the phase of the plate cylinder Is difficult to match with the same phase accurately. Moreover, even if the phase of the plate cylinder can be accurately matched to the same phase in consideration of the play between the gears, a large play (backlash) is generated due to the secular change such as wear of the gear, Even if the same amount is rotated by a dedicated motor, the plate cylinder cannot be accurately positioned in the same phase, and there is room for improvement.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a plate cylinder phase switching device for a printing press that can accurately match the phases of the plate cylinders.

  In order to achieve the above object, a printing cylinder phase switching device for a printing press according to the present invention is a printing press comprising a plurality of printing units, each printing unit including a plate cylinder shaft that can be driven and rotated, and the printing plate. A plate cylinder that is attached to the cylinder shaft so as to be rotatable together; and a driving force transmission mechanism that transmits a driving force from a driving source. The driving force transmitted to the driving force transmission mechanism is applied to each plate cylinder shaft. A driving force transmission unit for transmitting or blocking the plate cylinder, and the plate cylinder of the printing unit is different in printing phase by transmitting or blocking the driving force to each plate cylinder shaft of the driving force transmission unit. Plate cylinder phase of a printing press configured to be able to switch the phase of each plate cylinder to a first rotation state to rotate and a second rotation state to rotate the plate cylinder in the same phase where the phase of the plate cylinder is the same. In the switching device, the driving force transmission unit may be a drive from the driving force transmission mechanism. A drive-side transmission portion configured to receive force and rotate to rotate independently of the plate cylinder shaft; and a drive-side transmission portion attached to the plate cylinder shaft so as to rotate integrally therewith and provided in the drive-side transmission portion. The first engaged portion or the first engaged portion for transmitting the driving force from the driving source to the plate cylinder shafts by being engaged with one engaging portion or the first engaged portion to be in the first rotation state. A first driven-side transmission portion having a first engagement portion, and a second engagement portion or a second engaged portion that is attached to each plate cylinder shaft so as to rotate integrally with each other and provided on the drive-side transmission portion A second driven portion having a second engaged portion or a second engaging portion for transmitting the driving force from the driving source to each plate cylinder shaft by being engaged with a portion to be in the second rotation state. A side transmission portion, and the follower with respect to the plate cylinder shaft between one of the two driven side transmission portions and the plate cylinder shaft. Characterized in that interposed the adjustment means for changing the phase of the transfer unit.

  According to the above configuration, for example, from a printing operation, a plate replacement operation for performing all plate replacement of each plate cylinder at the same time, and a maintenance operation for performing a cleaning operation or an inspection for cleaning the plate clamping device at the same time (all these operations are described in the following When performing a general operation), it is possible to switch from a first rotation state in which the plate cylinder of the printing unit is rotated at a different printing phase to a second rotation state in which the printing unit is rotated at the same phase. That is, when the driving force transmission unit is blocked, transmission of the driving force from the driving source to the plate cylinder shaft is blocked, and at the same time, the first engagement unit or the first engaged unit provided in the driving side transmission unit The engagement with the first engaged portion or the first engaging portion of the first driven transmission portion is released. By switching to the transmission state after this interruption, the second engaged portion or the second engaged portion provided in the drive side transmission portion and the second engaged portion or the second engagement portion of the second driven side transmission portion Can be switched to the same phase so that the phases of the plate cylinders are the same. Similarly, from the same phase to the printing phase in which the phase of the plate cylinder of the printing unit is different, the second engaging portion or the second engaged portion and the second driven side transmitting portion provided in the driving side transmitting portion. After the engagement with the second engaged portion or the second engaged portion is released, the first engaged portion or the first engaged portion provided on the drive side transmitting portion and the first driven side transmitting portion Switching can be performed by engaging the first engaged portion or the first engaging portion. The phase of the plate cylinder shifts from the printing phase or the same phase due to play (backlash) that occurs when the gears mesh with each other, for example, due to secular changes such as when the printing press is assembled or when the gears wear. There may be. In this case, the adjusting means can adjust the phase of the driven-side transmission unit with respect to the plate cylinder axis steplessly, and the plate cylinder that rotates integrally with the driven-side transmission unit is accurately aligned with the printing phase or the same phase. can do.

  Further, in the plate cylinder phase switching device for a printing press according to the present invention, the plate cylinder is configured such that a plate can be attached thereto, and each printing unit includes a rubber cylinder to which ink on the plate is transferred, and the rubber An impression cylinder that sandwiches and conveys the paper together with the cylinder, and the driving force transmission mechanism includes a mechanism that synchronously drives all the cylinders of all the printing units, and the driving source includes the driving force transmission mechanism. The adjusting means may be composed of a hydraulic holder.

  According to the above configuration, by driving one drive source, it is possible to drive the driving force transmission mechanism and to synchronously drive all the cylinders provided in all the printing units. Then, the driving force from the driving source is transmitted to or cut off from each plate cylinder axis by the driving force transmission unit, so that the printing phases of all the printing cylinders of all the printing units are different from each other and the phase of each printing cylinder is the same. All the plate cylinders can be switched to the same phase, and the configuration can be simplified as compared with the case where a dedicated motor for driving each plate cylinder is provided. The hydraulic holder that constitutes the adjusting means includes a hydraulic chamber in which hydraulic oil is placed and a piston that pressurizes the hydraulic oil in the hydraulic chamber. Therefore, by operating the piston from the outside and pressurizing the hydraulic oil, the pressurized hydraulic oil bulges the walls at both ends in the radial direction of the hydraulic chamber, thereby fixing the driven side transmission section to the plate cylinder shaft. be able to. Further, by releasing the pressurization to the hydraulic oil, the driven side transmission portion fixed to the plate cylinder shaft can be loosened and the fixation to the plate cylinder shaft can be released.

  Further, in the printing cylinder phase switching device of the printing press according to the present invention, the drive side transmission unit is rotatably supported on a printing cylinder shaft of a printing cylinder other than a predetermined printing cylinder among printing cylinders of all printing units. The first engagement portion that engages with the first engaged portion or the first engagement portion of the first driven-side transmission portion on one of the two axial surfaces of the transmission gear. The second portion that includes a joint portion or a first engaged portion, and that engages with the second engaged portion or the second engaging portion of the second driven side transmitting portion on the other surface of the transmission gear. An engagement part or a second engaged part may be provided, and the first driven side transmission part and the second driven side transmission part may be distributed and arranged on both sides in the axial direction of the transmission gear.

  According to the above configuration, the first engaged portion or the first engaged with the first engaging portion or the first engaged portion of the first driven side transmitting portion on one surface of both surfaces of the transmission gear. A second engaged portion or a second engaging portion that includes an engaging portion and that engages with the second engaging portion or the second engaged portion of the second driven transmission portion on the other surface. As a result, it is possible not only to prevent the plate cylinder phase switching device from increasing in size in the axial direction, but also to reduce the size of the assembly work, compared to the case where two transmission gears that engage with the two driven transmission units are provided. Simplification can be achieved.

  According to the present invention, a plate cylinder phase of a printing press that can accurately match the phase of the plate cylinder with respect to the plate cylinder axis by interposing an adjusting means between at least one driven side transmission section and the plate cylinder axis. A switching device can be provided.

(A), (b), (c) is the schematic diagram which simplifies and shows the drive transmission part of the plate cylinder of the plate cylinder phase switching apparatus based on this invention. It is the schematic diagram which shows a transmission gear and a clutch in a simplified manner, and (a) shows that an engaged portion for printing of a first clutch of each printing unit and an engaging portion of a transmission gear are engaged during printing. (B) shows a state in which the engaged portion for the same phase of the second clutch of each printing unit and the engaging portion of the transmission gear are engaged at the time of plate replacement. It is sectional drawing which shows the specific structure of two clutches, (a) shows the case where a 1st clutch is OFF and a 2nd clutch is ON, (b) shows that a 1st clutch is ON and a 2nd clutch is OFF. Shows the case. It is a block diagram which shows the structure of a control apparatus. BRIEF DESCRIPTION OF THE DRAWINGS It is the whole side view which shows schematic structure of one Embodiment of the printing machine provided with the plate cylinder phase switching apparatus based on this invention, (a) shows a printing state, (b) shows the state which cut the clutch, (C) has shown the state which is driving the drive source from the state which disconnected the clutch. BRIEF DESCRIPTION OF THE DRAWINGS It is a whole side view which shows schematic structure of one Embodiment of the printing press provided with the plate cylinder phase switching apparatus based on this invention, (d) is the phase of the plate cylinder of the 3rd unit in the phase of the plate cylinder of the 1st unit. (E) shows a state in which the phase of the plate cylinder of the second unit coincides with the phase of the plate cylinder of the first unit, and (f) shows a state of the fourth in phase of the plate cylinder of the first unit. It shows a state in which the phase of the plate cylinder of the unit matches. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view showing a schematic configuration of an embodiment of a printing press provided with a plate cylinder phase switching device according to the present invention, and shows a state in which all plate cylinders are located at a plate exchange position. It is the top view made into the partial cross section which simplified and showed the relationship between the plate cylinder and rubber cylinder of the plate cylinder phase switching apparatus which concerns on this invention. It is a flowchart which shows phase alignment control of a printing cylinder.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In this embodiment, the plate cylinder phase switching device is applied to a fully automatic plate changer.

  The printing press illustrated in FIG. 5A includes a paper feeding device 20, a printing unit 30, and a paper discharge unit 40. The paper feeding device 20 can supply the sheet P to the printing unit 30 via the feeder board 5. The printing unit 30 can print the sheet P supplied from the paper feeding device 20, and includes a plurality of printing units (here, four printing units 30a to 30d). Further, the paper discharge unit 40 can discharge the printed matter Q printed by the printing unit 30.

  In this printing machine, the sheet P is supplied from the paper supply device 20 to the printing unit 30, and the supplied sheet P is printed by the printing units 30 a to 30 d in the printing unit 30, and then the printing is performed. The printed matter Q is discharged by the paper discharge unit 40.

  The sheet feeding device 20 can accommodate a plurality of sheets P, pulls out one sheet at a time from the uppermost sheet P, and directs the sheet P toward the printing unit 30 via the feeder board 5. It can be conveyed in the direction of arrow Z. Thereby, the sheet P can be supplied to the printing unit 30.

  Each of the printing units 30a to 30d of the printing unit 30 (hereinafter, these four printing units are connected to the first printing unit 30a, the second printing unit 30b, the third printing unit 30c, and the second printing unit from the upstream side in the conveyance direction of the sheet P). 4 printing unit 30d) includes a plate cylinder 1, a rubber cylinder 2, and an impression cylinder 3 as a set of main components. 4a in the printing unit 30a is a paper feed cylinder, and 4 in the printing units 30b to 30d is a transfer cylinder. The plate cylinder 1 is provided with a tail-side plate clamp 1a and a tail-side plate clamp 1b. As shown in FIG. 5A, the plate cylinders 1 of the first to fourth printing units 30a to 30d are provided at different phases determined in advance for the convenience of the printing position of the sheet P (咥By looking at the positions of the collar plate clamp 1a and the tail edge plate clamp 1b, it can be confirmed that the phases are different in the circumferential direction). Specifically, the plate cylinder 1 of the second printing unit 30b is provided so as to have a predetermined first phase difference with respect to the plate cylinder 1 of the first printing unit 30a. The plate cylinder 1 of the third printing unit 30c is provided so that a predetermined second phase difference exists with respect to the plate cylinder 1 of the first printing unit 30a. The plate cylinder 1 of the fourth printing unit 30d is provided so that a predetermined third phase difference exists with respect to the plate cylinder 1 of the first printing unit 30a. Here, the predetermined first to third phase differences have different sizes, and the sizes can be set freely.

  In each of the printing units 30a to 30d, a printing plate (not shown) is disposed on the plate cylinder 1. Ink and water are supplied to the plate from an ink roller group and a water supply device (not shown), and the ink is transferred to the rubber cylinder 2 according to the plate. The ink transferred to the rubber cylinder 2 is further transferred to the sheet P conveyed while being sandwiched between the rubber cylinder 2 and the impression cylinder 3. As a result, printing can be performed corresponding to the plates provided on the sheet P supplied from the sheet feeding device 20.

  The paper discharge unit 40 includes a transport unit 41 and a storage unit 42. In the paper discharge unit 40, the printed product Q conveyed by the impression cylinder 3 of the printing unit 30d is held at the leading end portion by a holding unit (not shown) of the conveyance unit 41, and on the substantially lower side surface of the conveyance unit 41 in the drawing. Then, it is conveyed to the accommodating portion 42. The storage unit 42 can store the printed material Q that has been transported by the transport unit 41.

  The aforementioned barrels 1, 2, and 3 are synchronously driven by a driving force transmission mechanism K, and the driving force transmission mechanism K is driven by the main motor M (see FIG. 4) and receives all the driving force from the main motor M. Are transmitted to the cylinders 1, 2, and 3 in the printing units 30a to 30d. The paper feed cylinder 4a is provided with an encoder 60 (rotary encoder, FIG. 4) that outputs a pulse signal corresponding to the rotation of the paper feed cylinder 4a. The encoder 60 includes third detection means for detecting the rotation angle of the plate cylinder 1 in which the engaging portion 61b of the second printing unit to the fourth printing units 30b to 30d and the engaged portion for phase 63a are engaged. It is composed. The third detection means can grasp the rotation angle of the engaged plate cylinder 1 by converting the pulse signal output according to the rotation of the sheet feeding cylinder 4a by the control device 80. ing. The machine motor M is one drive source in the present invention.

  1A, 1B, and 1C show a part of the second printing unit 30b, and a driving force transmission mechanism K and a driving mechanism for transmitting a driving force from the machine motor M to the plate cylinder 1. FIG. FIG. 3 is a schematic diagram showing a driving force transmission unit that transmits the driving force transmitted to the force transmission mechanism K to each plate cylinder 1 and omits a hydraulic holder H described later. A transmission gear 61 that transmits a driving force to the plate cylinder 1 is rotatably provided on the plate cylinder shaft 1 c provided in the plate cylinder 1. The transmission gear 61 meshes with a rubber cylinder gear 52 to which a driving force (hereinafter simply referred to as power) from the motor M is transmitted, and rotates in synchronization with the rotation of the rubber cylinder gear 52. The driving force transmission mechanism K includes a gear transmission mechanism (not shown) for transmitting power from the motor M to the impression cylinder gears (not shown) of all the printing units 30a to 30d, and an impression cylinder gear (not shown). And a rubber cylinder gear 52 that transmits power transmitted to an impression cylinder gear (not shown) to the rubber cylinder shaft 2a. Accordingly, the power from the machine motor M is transmitted to the impression cylinder gears (not shown) of all the printing units 30a to 30d via the gear transmission mechanism (not shown), and all the impression cylinders 3 rotate. . The power transmitted to these impression cylinder gears (not shown) is also transmitted to the rubber cylinder gears 52 of all the printing units 30a to 30d, and all the rubber cylinders 2 rotate. The power transmitted to the rubber cylinder gears 52 is also transmitted to the transmission gears 61 of all the printing units 30a to 30d, and all the plate cylinders 1 are rotated. Further, a driving force transmission portion for transmitting or interrupting power to the plate cylinder 1 is engaged with the rubber cylinder gear 52 and receives power from the rubber cylinder gear 52 so as to drive and rotate regardless of the plate cylinder shaft 1c. A transmission gear 61 as a drive-side transmission portion that is configured, and is arranged so as to be distributed on both sides in the axial direction of the transmission gear 61, is attached so as to rotate integrally with the plate cylinder shaft 1 c, and is associated with the transmission gear 61. The first and second clutches 62 and 63 are provided as driven side transmission portions that are switched to a state in which power is transmitted to the plate cylinder shaft 1c by being coupled or disengaged and a state in which power is interrupted.

  As shown in FIGS. 3A and 3B, the transmission gear 61 includes a gear body 61G having a tooth portion that meshes with the rubber drum gear 52, and one of the two surfaces in the thickness direction of the gear body 61G (see FIG. 3). The first relay member 61H attached to the left surface of the first drive member 61A, the first drive drive hub 61A attached via the first relay member 61H, and the first relay member 61H attached to the other surface (the right surface in the figure). 2 relay members 61I and a second drive drive hub 61B attached via the second relay member 61I.

  The first clutch 62 receives the power from the first drive hub 61A and transmits power to the plate cylinder shaft 1c, and a first clutch 62A by a biasing force of a spring (not shown). A first electromagnet 62B that separates the first clutch plate 62A that is urged to move toward the drive drive hub 61A from the first drive drive hub 61A, and a first holder 62C that holds the first electromagnet 62B are provided.

  The second clutch 63 receives the power from the second drive drive hub 61B and transmits the power to the plate cylinder shaft 1c. The second clutch 63 moves toward the second drive drive hub 61B by the biasing force of the spring. A second electromagnet 63B that separates the second clutch plate 63A that is being urged from the second drive drive hub 61B and a second holder 63C that holds the second electromagnet 63B are provided.

  The first clutch plate 62A is attached to the plate cylinder shaft 1c so as to be integrally rotatable and movable in the axial direction. Further, the second clutch plate 63A is attached to the plate cylinder shaft 1c via an oil pressure holder H, which will be described later, so as to be integrally rotatable and movable in the axial direction. Further, the first driving drive hub 61A of the transmission gear 61 is provided with a convex printing engagement portion (first engagement portion) 61a, and the concave printing substrate engaged with the printing engagement portion 61a. An engaging portion (first engaged portion) 62a is provided on the first clutch plate 62A. A convex in-phase engaging portion (second engaging portion) 61b is provided on the second drive drive hub 61B of the transmission gear 61, and the concave in-phase engaging with the in-phase engaging portion 61b. An engaged portion (second engaged portion) 63a is provided on the second clutch plate 63A. The first and second clutches 62 and 63 are provided in the second to fourth printing units 30b to 30d, and are not provided in the first (first) printing unit 30a. That is, the plate cylinder 1 of the first printing unit 30a is configured to always transmit the power from the motor M, and the phase of the plate cylinder 1 of the first printing unit 30a is the second to fourth. It is set as a target phase for adjusting the phase of the plate cylinder 1 to the same phase. Here, the phase of the plate cylinder 1 (predetermined plate cylinder 1) of the first printing unit 30a is set to a target phase, but the printing cylinder 1 of any printing unit among the other printing units 30b to 30d. The phase may be set to a target phase. The first and second clutch plates 62A, 63A are constantly urged toward the transmission gear 61 by a spring (not shown) and are configured to engage with the transmission gear 61. The engagement with the transmission gear 61 can be released by temporarily moving to the side opposite to the transmission gear 61 (the side away from the transmission gear 61).

  The phase of the engaged portion for printing 62a and the phase of the engaged portion for phase 63a are different by a predetermined angle in the rotation direction. Therefore, when the printing engaging portion 61a and the printing engaged portion 62a are engaged as shown in FIGS. 1B, 2A, and 3B, the transmission gear 61 and the first clutch plate are engaged. The first rotation state in which all the plate cylinders 1 are rotated at a printing phase in which the phases of all the plate cylinders 1 are different from each other by rotating integrally with 62A can be achieved. When the in-phase engaging portion 61b and the in-phase engaged portion 63a are engaged as shown in FIGS. 1C, 2B, and 3A, the transmission gear 61 and the second The clutch plate 63 </ b> A rotates integrally with each other, and the second rotation state in which all the plate cylinders 1 are rotated at the same phase where all the plate cylinders 1 have the same phase can be achieved. That is, during printing, the plate cylinder 1 is rotated by the power from the rubber cylinder gear 52 via the transmission gear 61, the first clutch plate 62A, and the plate cylinder shaft 1c. During plate work, the power from the rubber drum gear 52 rotates the plate cylinder 1 via the transmission gear 61, the second clutch plate 63A, and the plate cylinder shaft 1c. When the engagement is released, the rotation of the rubber drum gear 52 is transmitted to the transmission gear 61 but not to the first and second clutch plates 62A and 63A and the plate cylinder shaft 1c. .

  The operation of the first and second clutches 62 and 63 will be described in detail. As shown in FIG. 3B, when the first clutch 62 is ON, the engaged portion 62a for printing of the first clutch plate 62A. The first electromagnet 62B does not act and the engagement state is maintained by the urging force of the spring (the first rotation state). At this time, the second electromagnet 63B is acting, and the second clutch plate 63A is slid toward the second electromagnet 63B against the biasing force of the spring, and the engaged portion 63a and the second drive drive hub 61B are moved. The engagement with the in-phase engaging portion 61b is released. Further, as shown in FIG. 3A, when the second clutch 63 is ON, the in-phase engaged portion 63a of the second clutch plate 63A and the in-phase engaging portion 61b of the second drive drive hub 61B. When the two are engaged, the second electromagnet 63B does not act, and the engagement state is maintained by the biasing force of the spring (second rotation state). At this time, the first electromagnet 62B is operating, and the first clutch plate 62A is slid toward the first electromagnet 62B against the biasing force of the spring, and the engaged portion for printing 62a and the first drive drive The hub 61A is disengaged from the printing engagement portion 61a.

  A hydraulic holder H is provided as an adjusting means for changing the phase of the second clutch 63 with respect to the plate cylinder shaft 1c. As shown in FIG. 3A, the hydraulic holder H has an annular hydraulic chamber H1 in which hydraulic fluid is put, and includes a piston (not shown) that pressurizes the hydraulic fluid in the hydraulic chamber. The piston is moved by operating the screw part H2, and the hydraulic oil is pressurized. By bulging the walls at both ends in the radial direction of the hydraulic chamber with the pressurized hydraulic oil, the second clutch plate 63A of the second clutch 63, which is a driven side transmission portion, can be fixed to the plate cylinder shaft 1c. Further, by releasing the pressurization to the hydraulic oil, the second clutch plate 63A fixed to the plate cylinder shaft 1c can be loosened and the fixation to the plate cylinder shaft 1c can be released. Since the hydraulic chamber is not provided in the portion facing the second clutch plate 63A (the sliding direction of the second clutch plate 63A), the expansion and contraction at both ends of the hydraulic chamber affect the sliding of the second clutch plate 63A. Will not affect.

  FIG. 4 is a schematic block diagram showing the configuration of the control device 80 of the plate cylinder phase switching device according to the present invention. The control device 80 is provided in the printer motor M, the encoder 60, and the printing units 30b to 30d. The first and second clutches 62 and 63, the origin sensor 74 (described later) provided in each of the printing units 30a to 30d, and the two proximity sensors 70 and 71 (described later) are connected. The control device 80 includes a microprocessor 81 (which may be a sequencer) that performs arithmetic processing, a ROM 82 that stores data and a predetermined program (such as an arithmetic expression or a table), and a RAM 83 that can store various types of information related to machine rotation speeds. And an interface 84 that mediates the exchange of various signals between the microprocessor 81 and a device (not shown) provided outside the control device 80.

  As shown in FIG. 8, each plate cylinder 1 is provided with a kicker 1d, and a sensor 74 for detecting the kicker 1d is fixed to each unit 30a to 30d. Since this is a mechanism similar to a sensor for confirming the origin position of the plate cylinder 1, which is also called a so-called origin sensor, also provided in a normal printing press, these may be used together. Also, first and second proximity sensors 70 and 71 (see FIG. 4) for detecting the positions of the first clutch plate 62A of the first clutch 62 and the second clutch plate 63A of the second clutch 63 provided in the plate cylinder 1 are provided. Is provided. The 1st proximity sensor 70 detects the 1st detection which detects that the engaging part 61a for printing and the engaged part 62a for printing of the 2nd printing unit-the 4th printing units 30b-30d were engaged (meshed). Means. Further, the second proximity sensor 71 detects the engagement of the in-phase engaging portion 61b and the in-phase engaged portion 63a of the second to fourth printing units 30b to 30d. Means. Further, as shown in FIGS. 3A and 3B, the first proximity sensor 70 is attached to the first holder 62C, and the second proximity sensor 71 is attached to the second holder 63C. In FIG. 3B, the printing engaging portion 61a and the printing engaged portion 62a are engaged (engaged), and the same phase engaging portion 61b and the same phase engaged portion. 63a is not engaged (not engaged). In this state, the first clutch plate 62A moves away from the first proximity sensor 70, and the first proximity sensor 70 detects that the first clutch plate 62A has moved away, so that the printing engaging portion 61a and the printing engaged portion 62a are moved. While detecting engagement (meshing), the second clutch plate 63A approaches the second proximity sensor 71, and by detecting the approach by the second proximity sensor 71, the in-phase engaging portion 61b. It is detected that the in-phase engaged portion 63a is not engaged (not engaged). The state opposite to this is shown in FIG. 3A, in which the printing engaging portion 61a and the printing engaged portion 62a are not engaged (not meshed) and are in phase. This is a state where the engaging portion 61b and the engaged portion for phase 63a are engaged (engaged). In this state, the first clutch plate 62A approaches the first proximity sensor 70, and the first proximity sensor 70 detects that the first clutch plate 62A has approached, so that the printing engaging portion 61a and the printing engaged portion 62a are connected. While detecting that they are not engaged (not engaged), the second clutch plate 63A is moved away from the second proximity sensor 71, and the second proximity sensor 71 detects that the second clutch plate 63A has moved away. It is detected that the joining portion 61b and the engaged portion for phase 63a are engaged (engaged). As the proximity sensors 70 and 71, magnetic sensors are generally used, but photoelectric sensors may be used.

  The operation of the fully automatic plate changer to which the plate cylinder phase switching device according to the present invention is applied will be described with reference to the drawing and the flowchart of FIG. Note that, regarding the control of this operation, the control device 80 automatically instructs a series of operations by an operation instruction using one button or the like of the operator.

  When the plate cylinders 1 are in the same phase from the printing position shown in FIG. 5A and the plates are exchanged at the same time, it is confirmed in step S1 in FIG. In step S2, when there is an operation instruction by an operator's one button or the like, in step S3, all the first clutches 62 provided in the second printing unit 30b to the fourth printing unit 30d are released (ON). Switch from OFF to OFF). Specifically, as shown in FIG. 3 (a), the first electromagnet 62B is operated to engage the printing of the first clutch plate 62A of the first clutch 62 of the second printing unit 30b to the fourth printing unit 30d. The engagement between the joint portion 62a and the printing engagement portion 61a of the first drive drive hub 61A is released (see FIGS. 1C and 5B). In FIG. 5B, the phase of the plate cylinder 1 of the second printing unit 30b is shifted by the first phase difference with respect to the phase of the plate cylinder 1 of the first printing unit 30a, and the plate cylinder of the third printing unit 30c. It can be confirmed that the phase of 1 is shifted by the second phase difference and the phase of the plate cylinder 1 of the fourth printing unit 30d is shifted by the third phase difference. Next, as shown in step S4 of FIG. 9 and FIG. 5C, the machine motor M is driven to rotate the machine, and then, in step S5 of FIG. 9, all the second clutches 63 are engaged (OFF). Switch from ON to ON). That is, the action of the second electromagnet 63B is released as shown in FIG. Then, the second clutch plate 63A of the second clutch 63 slides in the direction of the transmission gear 61 by a spring (not shown), but the same phase engaged portion 63a of the second printing unit 30b to the fourth printing unit 30d. Since the phase of the engaging portion 61b is different and the engaging cannot be performed, the transmission gear 61 rotates while being in sliding contact with the second clutch plate 63A. Therefore, the three plate cylinders 1 indicated by broken lines in FIG. 5C do not rotate. In FIGS. 5 and 6, the plate cylinder 1 in which the second clutch 63 and the transmission gear 61 are not engaged in the second printing unit 30b to the fourth printing unit 30d is indicated by a broken line. The body 1 is shown by a solid line.

  If the machine rotation is continued, the in-phase engaged portion 63a of the second clutch plate 63A of the second clutch 63 and the in-phase of the second drive drive hub 61B that are in the meshing position as shown in step S6 of FIG. The engaging portion 61b is engaged (engaged). That is, the in-phase engaging portion 61b and the in-phase engaged portion 63a of the third printing unit 30c are located at the engaging position, and the second clutch plate 63A of the second clutch 63 is transmitted by the urging force of the spring. The second clutch plate is slid in the 61 direction by engaging both, that is, the in-phase engaged portion 63a of the second clutch plate 63A and the in-phase engaging portion 61b of the second drive drive hub 61B. 63A and the transmission gear 61 can rotate together. Therefore, the plate cylinder 1 is rotated by transmission of the rotational driving force of the rubber cylinder gear 52. In other words, the phase of the plate cylinder 1 of the third printing unit 30c that does not rotate coincides with the phase of the plate cylinder 1 of the rotating first printing unit 30a (the same phase), and the third The in-phase engaging portion 61b and the in-phase engaged portion 63a of the printing unit 30c are engaged, and the plate cylinder 1 of the third printing unit 30c is in phase with the plate cylinder 1 of the first printing unit 30a. It rotates in a state (refer FIG.6 (d)). In step S7 of FIG. 9, the control device 80 confirms whether or not the second clutch 63 is securely engaged (engaged) based on the detection signal from the second proximity sensor 71, When it is determined that they are engaged, the angle of the plate cylinder 1 of the engaged second clutch 63 is detected by the encoder 60, and it is confirmed whether the angle at which the plate cylinder 1 is rotated is correct (step S8).

  When the mechanical rotation is further continued, the in-phase engaging portion 61b and the in-phase engaged portion 63a of the second printing unit 30b are engaged as shown in FIG. 6E, as in the third printing unit 30c. The second clutch 63 is slid in the direction of the transmission gear 61 by the urging force of the spring and engaged with each other, so that the second clutch 63 and the transmission gear 61 can rotate together. Therefore, the plate cylinder 1 is rotated by the rotational drive transmission of the rubber cylinder gear 52. That is, the phase of the plate cylinder 1 of the second printing unit 30b coincides with the phase of the plate cylinder 1 of the rotating first printing unit 30a (the same phase), and at the same time the phase of the second printing unit 30b is the same. The engaging portion 61b for engaging and the in-phase engaged portion 63a are engaged (see FIG. 6E), and the plate cylinder 1 of the second printing unit 30b is in phase with the plate cylinder 1 of the first printing unit 30a. (See FIG. 6F). In step S7 of FIG. 9, the control device 80 confirms whether or not the second clutch 63 is securely engaged (engaged) based on the detection signal from the second proximity sensor 71, When it is determined that they are engaged, the angle of the plate cylinder 1 is detected by the encoder 60, and it is confirmed whether or not the angle at which the plate cylinder 1 is rotated is correct.

  If the mechanical rotation is further continued, the in-phase engaging portion 61b and the in-phase engaged portion 63a of the fourth printing unit 30d are positioned at the engaged position, as in the third printing unit 30c and the second printing unit 30b. Then, the second clutch 63 slides in the direction of the transmission gear 61 by the biasing force of the spring and engages (engages) with each other, so that the second clutch 63 and the transmission gear 61 can rotate together. Therefore, the plate cylinder 1 is rotated by the rotational drive transmission of the rubber cylinder gear 52. That is, the phase of the plate cylinder 1 of the fourth printing unit 30d coincides with the phase of the plate cylinder 1 of the rotating first printing unit 30a (the same phase), and at the same time the phase of the fourth printing unit 30d is the same. The engaging portion 61b and the in-phase engaged portion 63a are engaged (engaged) (see FIG. 6F), and the plate cylinder 1 of the fourth printing unit 30b is the same as the plate cylinder 1 of the first printing unit 30a. Rotates in phase (see FIG. 7). In step S7 of FIG. 9, the control device 80 confirms whether or not the second clutch 63 is securely engaged (engaged) based on the detection signal from the second proximity sensor 71, When it is determined that they are engaged, the angle of the plate cylinder 1 of the engaged second clutch 63 is detected by the encoder 60, and it is confirmed whether the angle at which the plate cylinder 1 is rotated is correct. If the rotation angle of the plate cylinder 1 when it is engaged is incorrect, it is notified in step 10 that it is abnormal, and the alignment control is terminated. As the means for notifying, there are means for displaying characters on a monitor, means by buzzer and sound, and the like. Although not shown in FIG. 9, when the predetermined angle plate cylinder 1 does not mesh even if it rotates, it is determined that there is an abnormality, and the notifying means informs it to end the alignment control. Also good.

  As described above, the target predetermined first printing unit 30a is applied to the plate cylinder 1 from the second printing unit 30b to the fourth printing unit 30d which is not rotated because the power from the motor M is cut off. When the plate cylinder 1 is rotated by the power from the machine motor M, the plate cylinder 1 having a phase close to the phase of the plate cylinder 1 of the first printing unit 30a among the second printing unit 30b to the fourth printing unit 30d. The phase is switched in order. Then, the in-phase engaging portion 61b and the in-phase engaged portion 63a of the printing unit having the same phase are engaged and the power from the machine motor M is transmitted, so that the in-phase state is obtained. The plate cylinder 1 rotates in synchronization with the plate cylinder 1 of the first printing unit 30a.

  By sequentially matching the phase of the plate cylinder 1 of the plate cylinders 1 of the second to fourth printing units 30b to 30d with the target phase of the plate cylinder 1 of the first printing unit 30a, The phases of all four plate cylinders 1 are the same phase (second rotation state). At this time, in step S9 of FIG. 9, the control device 80 determines that the phase alignment of all the printing units 30b to 30d has been completed, and ends the control.

  In the above embodiment, the plate cylinders of all the printing units can be easily and efficiently switched to the same phase by using one drive source without providing a dedicated plate cylinder motor for each printing unit as in the prior art. It becomes possible.

  Then, after the plates of each printing unit are replaced, the second electromagnet 63B is operated to disengage the in-phase engaged portion 63a of the second clutch 63 and the in-phase engaging portion 61b of the transmission gear 61. Then, by rotating the machine motor M to release the action of the second electromagnet 63B, the engaged portions for printing 62a and the engaging portions for printing 61a of the printing units 30a to 30d are sequentially engaged. The four plate cylinders 1 are switched from the same phase to a predetermined different phase (first rotation state) shown in FIG. 5A, so that printing can be performed again.

  Here, a mechanism for finely adjusting the phase of the plate cylinder 1 will be described. As described above, when the in-phase engaging portion 61b of each transmission gear 61 is engaged with the in-phase engaged portion 63a of the second clutch 63, all the plate cylinders 1 are designed to have the same phase. Yes.

  However, when actually assembling the printing press, all plates of all the printing units 30a to 30d are caused by assembly errors between the printing units 30a to 30d (especially errors due to play (backlash) caused by the meshing between the gears). The cylinder 1 may not be in phase. Moreover, even in the initial phase, there is a possibility that the phase may be shifted due to wear of components caused by long-term use of the printing press. For this reason, as described above, the hydraulic holder H is provided between the plate cylinder shaft 1 c and the second clutch 63. By loosening the hydraulic holder H, the phase in the rotational direction of the second clutch 63 relative to the plate cylinder shaft 1c can be adjusted steplessly, and each plate cylinder 1 can be accurately aligned with the same phase. it can. After the adjustment, the second clutch 63 can be fixed to the plate cylinder shaft 1c by tightening the hydraulic holder H again.

  Further, the first detecting means 70 detects that the printing engaging portion 61a and the printing engaged portion 62a of each of the printing units 30b to 30d are engaged, and the rotation angle of the plate cylinder 1 when engaged. Is detected by the third detecting means 60, it can be confirmed that the engagement has been performed reliably and that the plate cylinder 1 has been correctly rotated to the engagement position. (Rotation abnormality) can be immediately grasped. Further, the second detecting means 71 detects that the in-phase engaging portion 61b and the in-phase engaged portion 63a of each of the printing units 30b to 30d are engaged, and the plate cylinder 1 when it is engaged. By detecting the rotation angle by the third detecting means 60, it is possible to confirm that the engagement has been performed reliably and that the plate cylinder 1 has been correctly rotated to the engagement position. An abnormality (rotation abnormality) can be immediately grasped.

  In addition, this invention is not limited to the above-mentioned embodiment, A various change is possible in the range which does not deviate from the summary of this invention. For example, in the above-described embodiment, it is used for the fully automatic plate change work. However, it may be used when the work for simultaneously cleaning the plate clamp device and the maintenance work are performed.

  In the above-described embodiment, the sheet offset printing machine is used. However, the present invention is not limited to this, and a printing machine having a plate cylinder may be a rotary paper printing machine, a gravure printing machine, or a flexographic printing machine. There may be.

  In the above-described embodiment, the first and second clutches 62 and 63 are not provided in the first printing unit 30a including the target plate cylinder 1, but the printing unit 30a including the target plate cylinder 1 is also provided. You may implement by providing the clutches 62 and 63. FIG.

  In the above-described embodiment, the hydraulic holder H is provided between the second clutch 63 and the plate cylinder shaft 1c. However, the hydraulic holder H is provided between the first clutch 62 and the plate cylinder shaft 1c. Alternatively, hydraulic holders H may be provided both between the first clutch 62 and the plate cylinder shaft 1c and between the second clutch 63 and the plate cylinder shaft 1c.

  In the above-described embodiment, the rotation angle of the plate cylinder 1 in which the in-phase engaging portion 61b and the in-phase engaged portion 63a of the second printing unit to the fourth printing units 30b to 30d are engaged is detected. The third detecting means that is configured by the encoder 60 that outputs a pulse signal corresponding to the rotation of the paper feed cylinder 4a may be configured by an encoder that directly detects the rotation angle of the plate cylinder 1.

  In the above-described embodiment, the case where the plate cylinders of all the printing units are switched to the same phase by using one drive source M without providing a plate cylinder dedicated motor in each printing unit has been described. A dedicated motor may be provided in each plate cylinder, and the plate cylinders of all printing units may be switched to the same phase by the plate cylinder dedicated motor.

  In the above-described embodiment, the engaging portions 61a and 61b that engage with the two clutches 62 and 63 are provided on both surfaces in the thickness direction of the single transmission gear 61. However, instead of one gear, two gears are provided. It is also possible to provide an engaging portion that engages with the first clutch 62 in one gear and an engaging portion that engages with the second clutch 63 in the other gear.

  In the above-described embodiment, the convex engaging portion 61a or 61b is provided on the transmission gear 61 side, and the concave engaged portions 62a and 63a that engage with the printing engaging portion 61a or 61b are provided. Although what was provided in the clutches 62 and 63 side was shown, the concave engaged part is provided in the transmission gear 61 side, and the convex engaging part engaged with this engaged part is the clutch 62, It may be provided on the 63 side. Moreover, although the convex engaging part and the concave engaged part which engages with this were provided, all comprised from a convex engaging part, and these two convex engaging parts mutually mesh. It may be a configuration. In some cases, it is also possible to use a gear and a clutch that have an adsorption action at a specific phase.

  In the above-described embodiment, the transmission gear 61 is provided with an engagement portion, and the two clutches 62 and 63 are provided with engagement portions. However, the transmission gear 61 is provided with an engagement portion, and the two clutches 62 are provided with engagement portions. , 63 may be provided with an engaging portion. Further, the arrangement of the transmission gear 61 and the two clutches 62 and 63 in the axial direction can be freely changed.

  The printing cylinder phase switching method and apparatus for a printing press according to the present invention is extremely useful in a printing press having a printing drum.

  DESCRIPTION OF SYMBOLS 1 ... Plate cylinder, 1a ... The tail side plate clamp, 1b ... The tail edge side plate clamp, 1c ... Plate cylinder axis (drive transmission part of a plate cylinder), 2 ... Rubber cylinder, 3 ... Impression cylinder, 4 ... Transfer cylinder DESCRIPTION OF SYMBOLS 5 ... Feeder board, 20 ... Paper feeder, 30 ... Printing part, 30a-30d ... Printing unit, 40 ... Paper discharge part, 41 ... Conveyance part, 42 ... Storage part, 51a ... Engaged part for printing, 51b ... engaged portion for same phase, 52 ... rubber cylinder gear, 53 ... clutch (contact / separation means), 53a ... engagement part, 60 ... encoder (third detection means), 61 ... transmission gear (driving force transmission part) , 61A, 61B ... Drive hub, 61G ... Gear body, 61H, 61I ... Relay member, 61a ... Printing engagement portion (first engagement portion), 61b ... In-phase engagement portion (second engagement portion) ), 62... First clutch (first driven side transmission portion), 62A, 63A... Clutch plate, 62B, 63B. Magnet, 62C, 63C ... holder, 62a ... engaged portion for printing (first engaged portion), 63 ... second clutch (second driven side transmitting portion), 63a ... engaged portion for same phase (first 2 engaged portions), 70, 71 ... proximity sensors (first and second detection means), 74 ... origin sensor, 80 ... control device, 81 ... microprocessor, 82 ... ROM, 83 ... RAM, 84 ... interface, K: Driving force transmission mechanism, M: Motor of this machine, N: Driving force transmission unit (clutch), P: Sheet paper, Q: Printed material, R: Driving device

Claims (3)

A printing machine comprising a plurality of printing units,
Each printing unit includes a plate cylinder shaft that can be driven and rotated, a plate cylinder that is integrally attached to the plate cylinder shaft, and a driving force transmission mechanism that transmits a driving force from a driving source.
A driving force transmitting portion for transmitting or blocking the driving force transmitted to the driving force transmitting mechanism to or from each plate cylinder shaft, and transmitting or blocking the driving force to each plate cylinder shaft of the driving force transmitting portion; To the first rotation state in which the plate cylinder is rotated at a printing phase in which the phase of the plate cylinder of the printing unit is different, and the second rotation state in which the plate cylinder is rotated at the same phase where the phase of the plate cylinder is the same. In the plate cylinder phase switching device of the printing press, which is configured to freely switch the phase of each plate cylinder,
The driving force transmission unit receives a driving force from the driving force transmission mechanism and is driven to rotate independently of the plate cylinder shaft, and rotates integrally with each plate cylinder shaft. And is engaged with a first engaging portion or a first engaged portion provided in the driving side transmission portion, and enters the first rotation state, and the driving force from the driving source is applied to each of them. A first driven side transmission portion having a first engaged portion or a first engagement portion for transmitting to the plate cylinder shaft, and a drive side transmission mounted on the plate cylinder shaft so as to rotate integrally. A second rotation state for engaging the second engaging portion or the second engaged portion provided in the portion to enter the second rotation state and transmitting the driving force from the driving source to the plate cylinder shafts. A second driven side transmission section having an engaged section or a second engagement section,
An adjusting means for changing the phase of the driven side transmission portion with respect to the plate cylinder shaft is interposed between one of the two driven side transmission portions and the plate cylinder shaft. A plate cylinder phase switching device for a printing press.   The plate cylinder is configured to be capable of mounting a plate, and each printing unit includes a rubber cylinder to which ink on the plate is transferred, and an impression cylinder that sandwiches and conveys paper together with the rubber cylinder, The driving force transmission mechanism includes a mechanism that synchronously drives all cylinders of all the printing units, the driving source includes one driving source that drives the driving force transmission mechanism, and the adjustment unit includes a hydraulic holder. The plate cylinder phase switching device for a printing press according to claim 1, comprising:   The drive-side transmission portion includes a transmission gear rotatably supported by a plate cylinder shaft of a plate cylinder other than a predetermined plate cylinder among the plate cylinders of all printing units, The first engaged portion or the first engaged portion that engages with the first engaged portion or the first engaged portion of the first driven transmission portion, and the transmission The second engaging portion or the second engaged portion that engages with the second engaged portion or the second engaging portion of the second driven side transmission portion is provided on the other surface of the gear, The plate cylinder phase switching device for a printing press according to claim 1 or 2, wherein the driven side transmission unit and the second driven side transmission unit are arranged separately on both sides in the axial direction of the transmission gear.

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