JP5147671B2 - Printing apparatus and plate making method of printing apparatus - Google Patents

Description

  The present invention relates to a printing apparatus and a plate making method of the printing apparatus, and more particularly to a stencil printing apparatus and plate making method of a stencil printing apparatus that perform a plate making operation regardless of the movement state of a plate making unit when making a plurality of drums.

The stencil printing apparatus has become more multicolored, and an apparatus having a plurality of drums has been proposed. Further, as proposed in Patent Document 1, a system in which a plate making unit is moved from one drum to the other drum and a plurality of drum units are made by one plate making unit has been put into practical use as a product. Here, image data that is the basis of plate making includes a method that is transmitted from a personal computer, and a scanning method in FB / AF (flat bed method / auto feeder method) that requires replacement of a document corresponding to each color.
JP 2004-299358 A

  Such a conventional method has the following problems. That is, in multicolor printing, since the plate making unit starts moving from one drum to the other drum and then the plate making process of the other drum is started, the plate making process is not performed for the moving time of the plate making unit. There was a problem.

  In addition, when scanning is necessary with FB / AF (flat bed method / auto feeder method), which requires document replacement in multicolor printing (for example, two colors), the document corresponding to one color and the other color It is necessary to set a corresponding document. For example, when only one document is set, there is a problem that the operation related to printing including the movement of the plate-making unit is stopped.

  The present invention has been made in view of the above-described problems, and the invention according to claim 1 is directed to a printing apparatus including a plurality of drums and a plate-making unit movable between the drums. Control by the plate making control means during the execution of the control by the movement control means, comprising: a movement control means for controlling the movement of the plate making unit between; and a plate making control means for controlling the plate making of each drum. It is desirable that the printing apparatus be configured to be executable.

  The invention according to claim 2 is configured such that a document on which the plate making of each drum is made can be set in the printing apparatus, and the movement control means controls the plate making control means regardless of the setting state of the next document. The above-described printing apparatus that performs control to move the plate-making unit to the next plate-making target drum side when the plate-making of the corresponding drum is completed is preferable.

  The invention according to claim 3 is preferably the printing apparatus, wherein the movement control means switches the plate-making unit to a predetermined operation mode during execution of the control by the plate-making control means.

  In the invention according to claim 4, a high-speed mode and a normal mode slower than the high-speed mode are preset in the operation mode, and the movement control unit is configured to perform the plate-making while the control by the plate-making control unit is being executed. The printing apparatus that switches the unit to the normal mode is desirable.

  According to a fifth aspect of the present invention, in the plate making method of a printing apparatus comprising a plurality of drums and a plate making unit movable between the drums, the movement control means controls the plate making unit to move between the drums. And a plate making control unit that performs control related to plate making of each of the drums, and performs control by the plate making control unit during execution of control by the movement control unit. Is desirable.

  As described above, according to the present invention, in PC output that does not require document replacement, the plate-making process on the plate-making target drum side can be performed before the plate-making unit is moved to the plate-making target drum side, and the speed of plate making can be increased. There is an effect.

  Also, in the case of a scanning method using FB / AF (flat bed method / auto-feeder method) that requires document replacement, the plate making unit is moved to the next when the plate making of the corresponding drum is completed even if the next document is not set. There is an effect that the plate making unit can be moved to the plate making target drum side to increase the speed.

  In addition, considering the image quality degradation due to vibration when moving the plate making unit, the operation mode (high speed / normal) of the plate making unit can be switched during FB / AF output, and the operation is performed in the preset operation mode, so the image quality deterioration in scanning. There is an effect that can be prevented.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall schematic configuration diagram of a stencil printing apparatus.

  In FIG. 1, the stencil printing apparatus 1 includes a plate making unit 2, a paper feeding unit 3, a first printing unit 4, an intermediate transport unit 5, a second printing unit 6, a paper discharge unit 7, and a first discharge plate. It is mainly composed of a section 8 and a second plate discharging section 9 and a document reading section 10U.

  The document reading unit 10U is provided on the upper part of the apparatus body 10, and reads a document to be printed as image data. The read image data is generated as plate making data for the color ink of the first drum 25 and the color ink of the second drum 36. The plate making data can be processed based on a predetermined command (enlargement, reduction, etc.). Further, the image data can be transmitted from the personal computer PC1, PC2 or the like (see FIG. 2) via the network 50.

  The plate making unit 2 has a plate making unit 11 provided in the apparatus main body 10 so as to be horizontally movable. The plate making unit 11 supplies the stencil sheet 12 to the first drum 25 by a plate making unit moving means (not shown). The first base paper supply position (the phantom line position in FIG. 1) and the second base paper supply position for supplying the stencil base paper 12 to the second drum 36 (solid line position in FIG. 1) are moved. The stencil making unit 11 includes a base paper storage unit 13 that stores the rolled long stencil base paper 12, a plurality of transport rolls 14 that guide the stencil base paper 12 stored in the base paper storage unit 13 to the transport downstream side, A thermal head 15 arranged on the downstream side of the conveyance roll 14, a platen roll 16 arranged at a position facing the thermal head 15 and rotated by a driving force of a light pulse motor (not shown), and a platen roll 16 And a pair of base paper feed rolls 17 and 17 which are arranged on the downstream side of the stencil paper 12 with respect to the thermal head 15 and are rotated by a driving force of a light pulse motor (not shown), and the pair of base paper feed rolls 17 and 17 17 and a base paper cutter 18 disposed between the platen roll 16 and the thermal head 15.

  The paper feed unit 3 includes a paper feed base 21 on which print papers 20 as print media are stacked, primary paper feed rolls 22 and 23 that transport only the uppermost print paper 20 from the paper feed base 21, and A pair of secondary paper feed rolls 24 that feed the printing paper 20 conveyed by the primary paper feed rolls 22 and 23 between the first drum 25 and the first press roll 27 in synchronization with the rotation of the first drum 25 described later. , 24. The rotation of a main motor (not shown) is selectively transmitted to the primary paper feed rolls 22 and 23 via respective paper feed clutches (not shown). The rotation of the main motor is transmitted to the pair of secondary paper feed rolls 24 and 24 via a cam mechanism (not shown), and is driven to rotate in synchronization with the rotation of the drum 25.

  Further, the paper feed unit 3 includes a paper sensor S1 having a paper conveyance path between the primary paper feed rolls 22 and 23 and the secondary paper feed rolls 24 and 24 as a detection point, secondary paper feed rolls 24 and 24, A secondary paper feed sensor S2 having a paper conveyance path between one drum 25 as a detection point is provided. The paper sensor S1 detects whether or not the printing paper 20 is conveyed by the primary paper feed rolls 22 and 23. The secondary paper feed sensor S2 detects whether or not the printing paper 20 is conveyed by the secondary paper feed rolls 24 and 24.

  The first printing unit 4 is composed of an ink-permeable member having a porous structure and an outer peripheral wall 25a. The first drum 25 is rotated in the direction of arrow A in FIG. Provided on the outer peripheral wall 25a of the first stencil paper 12 and clamped at the front end of the stencil sheet 12 and disposed in the first drum 25. The squeegee roll (not shown) has ink on the inner peripheral surface side of the outer peripheral wall 25a. A first ink supply means (not shown) for supplying the ink and a first press roll 27 that is a press member disposed outside the outer peripheral wall 25a of the first drum 25 and at a position facing the squeegee roll. I have.

  The first drum 25 can be stopped at a substantially intended stop position (plate receiving standby position) by drive control of a main motor and an electromagnetic brake (not shown). The first drum 25 is provided with a first drum stop pin (not shown) that is a stop reference member, and the position of the first drum stop pin is held by a drum stop position correction mechanism (not shown). By doing so, the first drum 25 can be stopped at an accurate plate standby position.

  The first clamp portion 26 includes a pressing plate (not shown) and a flip-up plate (not shown), and a closed position for sandwiching the tip of the stencil sheet 12 and an open position for opening the tip of the stencil sheet 12. It is provided so that it can be changed between. Both the pressing plate and the flip-up plate are biased toward the closed position, and a clamp pin (not shown) is attached to the press plate, and a flip-up pin (not shown) is attached to the flip-up plate. . The first clamp portion 26 is opened and closed by the clamp opening and closing mechanism interfering with these pins.

  The configuration of the first press roll 27 is sufficiently retracted from the pressing position for pressing the outer peripheral wall 25a of the first drum 25 and the outer peripheral wall 25a of the first drum 25 by a first press roll moving mechanism (not shown). It is provided so as to be movable between the retracted position. The first press roll 27 is located at the retracted position during non-printing, and escapes to a minute separation position slightly separated from the outer peripheral wall 25a of the first drum 25 in a range where the first press roll 27 interferes with the first clamp portion 26 during printing. In the range, it is displaced so as to be located at the pressing position.

  Further, the first printing unit 4 includes a separation claw 28 and a separation nozzle 29 that are disposed in the vicinity of the first drum 25 on the downstream side of the sheet conveyance. The separation claw 28 is inserted between the outer peripheral surface of the first drum 25 and the front end of the printing paper 20 that is conveyed while being attached thereto. As a result, the printing paper 20 that is stuck to the outer peripheral surface of the first drum 25 and is about to rotate is forcibly peeled off from the outer peripheral surface of the first drum 25. An air nozzle (not shown) is provided at the tip of the separation claw 28, and tip separation air compressed by a first separation pump (not shown) is discharged from the air nozzle at the timing of peeling the printing paper 20. It has become so. Thereby, only the front end portion of the printing paper 20 attached to the outer peripheral surface of the first drum 25 is peeled off by the compressed front end separation air. The separation air generated by the separation fan 30 is blown from the separation nozzle 29 between the outer peripheral surface of the first drum 25 and the printing paper 20 that is conveyed while adhering to the outer peripheral surface. The separation fan 30 is always driven during the rotation of the first drum 25, and the separation air is used to remove the leading edge of the printing paper 20 from which the leading edge separation air is discharged from the air nozzle provided on the separation claw 28. The whole is forcibly peeled off from the outer peripheral surface of the first drum 25.

  Then, the first printing unit 4 clamps the front end of the stencil sheet 12 conveyed from the plate making unit 2 with the first clamp unit 26, and rotates the first drum 25 in this clamped state so that the stencil sheet 12 is the first stencil sheet 12. Printing is performed by pressing the printing paper 20 wound around the outer peripheral wall 25 a of the drum 25 and conveyed in synchronization with the rotation of the first drum 25 against the stencil sheet 20 of the first drum 25 by the first press roll 27. The first color image is printed by transferring the ink from the perforated portion of the stencil sheet 12 to the paper 20.

  The intermediate conveying unit 5 includes a pair of belt-hanging pulleys 31 and 31 disposed at a sheet conveying downstream position of the first drum 25 and a sheet conveying upstream position of a second drum 36 described later, and the pair of belt-hanging pulleys 31. , 31, an infinite end belt 32, a suction fan 33 for sucking the printing paper 20 onto the paper transport surface of the infinite end belt 32, and a belt driving means (not shown) for moving the infinite end belt 32. I have. The intermediate conveyance unit 5 receives the printing paper 20 peeled from the first drum 25 and feeds the received printing paper 20 between the second drum 36 and the second press roll 38 in synchronization with the rotation of the second drum. It is supposed to be.

  Further, the intermediate transport unit 5 is provided with an intermediate sensor S3. The intermediate sensor S3 detects whether or not the printing paper 20 is separated from the first printing unit 4.

  The second printing unit 6 has the same configuration as the first printing unit 4, has a cylindrical outer peripheral wall 36a, and rotates in the direction of arrow B in FIG. 1 by the driving force of a main motor (not shown). A drum 36, a second clamp portion 37 that is provided on the outer peripheral wall 36a of the second drum 36, clamps the leading end of the stencil sheet 12, and is disposed in the second drum 36, on the inner peripheral surface side of the outer peripheral wall 36a. Second ink supply means (not shown) for supplying ink from a squeegee roll (not shown), and a press member disposed outside the outer peripheral wall 36a of the second drum 36 and at a position facing the squeegee roll And a second press roll 38.

  Similar to the first drum 25, the second drum 36 can be stopped at a substantially intended stop position (plate standby position) by drive control of a main motor (not shown) and an electromagnetic brake (not shown). . The second drum 36 is provided with a second drum stop pin (not shown) that is a stop reference member, and the second drum stop pin is held in position by a drum stop position correcting mechanism (not shown). By doing so, the second drum 36 can be stopped at an accurate plate standby position.

  The second clamp portion 37 includes a pressing plate (not shown) and a flip-up plate (not shown), a closed position for sandwiching the tip of the stencil sheet 12, and an open position for opening the tip of the stencil sheet 12. It is provided so that it can be changed between. Both the pressing plate and the flip-up plate are biased toward the closed position, and a clamp pin (not shown) is attached to the press plate, and a flip-up pin (not shown) is attached to the flip-up plate. . As in the case of the first clamp part 26, the clamp opening / closing mechanism interferes with these pins so that the second clamp part 37 is opened and closed. The configuration of the second press roll 38 is the same as that of the first press roll 27, and a description thereof will be omitted.

  The second printing unit 6 includes a separation claw 39 and a separation nozzle 40 that are disposed in the vicinity of the second drum 36 on the downstream side of the sheet conveyance. The separation claw 39 is inserted between the outer peripheral surface of the second drum 36 and the front end of the printing paper 20 that is conveyed while being attached thereto. As a result, the printing paper 20 that is stuck to the outer peripheral surface of the second drum 36 and is about to rotate is forcibly peeled off from the outer peripheral surface of the second drum 36. An air nozzle (not shown) is provided at the tip of the separation claw 39, and the tip separation air compressed by a second separation pump (not shown) is discharged from the air nozzle at the timing when the printing paper 20 is peeled off. It has become so. Thereby, only the front end of the printing paper 20 adhered to the outer peripheral surface of the second drum 36 is peeled off by the compressed front end separation air. The separation air generated by the separation fan 41 is blown from the separation nozzle 40 between the outer peripheral surface of the second drum 36 and the printing paper 20 conveyed in a state of being attached thereto. The separation fan 41 is always driven during the rotation of the second drum 36, and the entire printing paper 20 is peeled off only by the leading edge separation air discharged from the air nozzle provided in the separation claw 39 by the separation air. Is forcibly separated from the outer peripheral surface of the second drum 36.

  Then, the second printing unit 6 clamps the leading end of the stencil sheet 12 conveyed from the plate making unit 2 with the second clamp unit 37, and rotates the second drum 36 in this clamped state so as to remove the stencil sheet 12 from the second stencil sheet 12. Printing is performed by winding the printing paper 20 wound around the outer peripheral wall 36 a of the drum 36 and being conveyed in synchronization with the rotation of the second drum 36 against the stencil sheet 12 of the second drum 36 by the second press roll 38. Ink is transferred from the perforated portion of the stencil sheet 12 to the paper 20 to print a second color image.

  The paper discharge unit 7 includes a belt conveyance mechanism 42 that conveys the printing paper 20 that has been peeled off from the second drum 36, and a paper discharge tray 43 on which the printing paper 20 that has been discharged from the belt conveyance mechanism 42 is placed. . The belt transport mechanism 42 includes a pair of pulleys 42a and 42a, an infinite end belt 42b hung between the pair of pulleys 42a and 42a, and a suction fan that sucks the printing paper 20 onto the paper transport surface of the infinite end belt 42b. 42c and a belt driving means (not shown) for moving the endless belt 42b, the printing paper 20 separated from the second drum 36 is transported to the paper discharge tray 43 and placed on the paper discharge tray 43. Place. The belt transport mechanism 42 is provided with a paper discharge sensor S4. The paper discharge sensor S4 detects whether or not the printing paper 20 is conveyed from the second printing unit 6.

  The first stencil unit 8 has a pair of stencil rolls 44 that convey the stencil sheet 12 that has been unclamped from the first drum 25 while the tip of the stencil sheet 12 wound around the first drum 25 is released from the clamp. , 44 and a plate discharge box 45 for storing the stencil sheet 12 conveyed by the pair of plate discharge rolls 44, 44.

  The second stencil unit 9 has a pair of stencil rolls 46 that conveys the stencil sheet 12 that is unclamped from the second drum 36 while the tip of the stencil sheet 12 wound around the second drum 36 is released from the clamp. , 46 and a plate discharging box 47 for storing the stencil sheet 12 conveyed by the pair of plate discharging rolls 46, 46.

  In this embodiment, the case where the stencil printing apparatus 1 has two drums (first and second drums 25 and 36) has been described. However, the stencil printing apparatus 1 has only one drum or has three or more drums. In this case, the present invention can be applied.

  In the embodiment of the present invention, the control relationship will be described with reference to the drawings. FIG. 2 shows a schematic configuration of a stencil printing apparatus 1 as one aspect of the printing apparatus.

  The stencil printing apparatus 1 is communicably connected to personal computers PC1 and PC2 via a network 50. The personal computers PC1 and PC2 are configured to create print data (image data) and transmit it to the stencil printing apparatus 1.

  The stencil printing apparatus 1 includes a system substrate 51 that controls image processing related to printing, the number of printed sheets, various modes related to printing, and a mechanical control substrate 52 that controls the operation of the machine of the printing device related to printing. Yes. The system board 51 includes a CPU (Central: Processing: Unit) 53, a memory 54, and system control means 55. A panel 56 is connected to the system board 51 so as to control the stencil printing apparatus 1 in accordance with a user operation.

  The mechanical control board 52 includes a CPU (Central: Processing: Unit) 57, a memory 58, and a machine control means 59. A mechanical unit 60 is connected to the mechanical control board 52, and is configured to operate under the control of the mechanical control means 59.

  Please refer to FIG. The machine control unit 59 includes a command receiving unit 61, a movement control unit 6219, a plate making control unit 63, and a reply unit 64.

  The machine control means 59 controls the operation of various machine units of the stencil printing apparatus 1. The command receiving means 61 receives a command related to machine control transmitted from the system control means 55 of the system board 51.

  The movement control means 62 controls movement of the plate making unit 11 and the like. The plate making control means 63 controls the creation of the plate based on the image data. Then, the reply means 64 replies that the processing related to the command is completed.

  This will be described in more detail. In the stencil printing apparatus 1 including the first and second drums 25 and 36 and the plate making unit 11 movable between the drums 25 and 36, the plate making unit 11 is controlled to move between the drums 25 and 36. A movement control means 62 and a plate making control means 63 for performing control relating to the plate making of each of the drums 25 and 36 are provided. Then, the control by the plate making control means 63 can be executed while the control by the movement control means 62 is being executed.

  Further, the originals for making the plates of the drums 25 and 36 are configured to be set in the stencil printing apparatus 1 (original reading unit 10U), and the movement control means 62 is the plate making control means regardless of the set state of the next original. Control of moving the plate-making unit 11 to the next plate-making target drum side is performed when the plate-making of the corresponding drum is completed by the control of 63.

  Further, the movement control means 62 switches the plate making unit 11 to a predetermined operation mode during execution of the control by the plate making control means 63. That is, a high-speed mode and a normal mode of movement slower than the high-speed mode are set in advance as the operation mode, and the movement control unit 62 moves the plate-making unit 11 to the normal mode during the execution of the control by the plate-making control unit 63. Switch to mode. As a result, vibrations to the stencil printing apparatus 1 are reduced, and the document can be scanned with higher image quality.

  Please refer to FIG. The operation when the image data transmitted from the personal computers PC1 and PC2 is output to the stencil printing apparatus 1 via the network 50 will be described.

  First, in step S401, the plate making unit 11 is moved to one side (first drum 25) by the movement control means 62. That is, the plate making unit 11 moves to the first base paper supply position (the phantom line position in FIG. 1).

  In step S402, a 1-side (first drum 25) discharging operation is performed. The machine control means 59 checks whether or not the stencil sheet 12 is wound around the first drum 25, and if it is wound, performs a plate removal process. The stencil sheet 12 wound around the first drum 25 is in a state where the tip of the stencil sheet 12 floats from the first clamp portion 26. When the first drum 25 rotates and the tip of the stencil sheet 12 that has floated up is positioned in the vicinity of the stencil roll 44, the pair of stencil rolls 44, 44 wind up the tip of the stencil sheet 12. The pair of stencil rolls 44, 44 conveys the stencil sheet 12 into the stencil box 45 as the first drum 25 rotates, so that the stencil sheet 12 is discarded into the stencil box 45.

  In step S <b> 403, the plate making control unit 63 starts the one side (first drum 25) plate making. That is, preparation is made to send out the stencil sheet 12 thermally perforated by the thermal head 15 based on the first color plate making data read by the plate making unit 11 by the original reading operation to the first drum 25 side. This process is performed in parallel with the process of step S401 and the process of step S402.

  In step S404, the one-side (first drum 25) master cut confirmation is completed. On the other hand, the first drum 25 is rotated. With the rotation of the first drum 25, the stencil sheet 12 is sent out from the plate making unit 11, and the stencil sheet 12 is wound around the outer peripheral surface of the first drum 25.

  In step S405, the plate making unit 11 is moved to the second side (second drum 36) under the control of the movement control means 62.

  In step S406, the second-side (second drum 36) plate discharging operation is executed. In the same manner as described above, the used stencil sheet 12 is removed from the second drum 36, and the newly-made stencil sheet 12 is wound.

  In step S407, the second side (second drum 36) plate-making is started under the control of the plate-making control means 63. That is, preparation for sending out the stencil sheet 12 thermally perforated by the thermal head 15 based on the plate-making data of the second color read by the plate-making unit 11 by the document reading operation is performed to the second drum 36 side. This process is performed in parallel with the process of step S405 and the process of step S406 described above.

  In step S408, the two-side (second drum 36) master cut confirmation is completed. When the confirmation of the two-side master cut is completed, the second drum 36 is rotated. As the second drum 36 rotates, the stencil sheet 12 is sent out from the plate making unit 11, and the stencil sheet 12 is wound around the outer peripheral surface of the second drum 36.

  In step S409, a two-color printing operation is executed. A main motor (not shown) rotates to rotate the first and second drums 25 and 36, and the printing paper 20 is fed from the paper feeding unit 3 to the first drum 25 in synchronization with this rotation. The fed printing paper 20 is pressed against the stencil sheet 12 of the first drum 25 by the first press roll 27, whereby a first color image is printed on the printing paper 20. The printing paper 20 on which the first color image is printed is peeled off from the outer peripheral surface of the first drum 25 by the separation claw 28, the leading edge separation air, and the separation air, and guided to the intermediate conveyance unit 5. In the intermediate conveyance unit 5, the printing paper 20 is conveyed by the movement of the infinite end belt 32, and the printing paper 20 is fed from the intermediate conveyance unit 5 to the second drum 36. The fed printing paper 20 is pressed against the stencil sheet 12 of the second drum 36 by the second press roll 38, whereby a second color image is printed on the printing paper 20. The printing paper 20 on which the second color image is printed is peeled off from the outer peripheral surface of the second drum 36 by the separation claw 39, the tip separation air, and the separation air, and is guided to the belt conveyance mechanism 42. In the belt conveyance mechanism 42, the printing paper 20 is conveyed by the movement of the endless belt 42 b, and is discharged from the most downstream side of the belt conveyance mechanism 42 to the paper discharge tray 43. The printing paper 20 discharged to the paper discharge tray 43 is placed in a stacked state here.

  Please refer to FIG. The operation of the stencil printing apparatus 1 that performs printing based on FB / AF (flat bed system / auto feeder system) output will be described.

  First, in step S501, the plate making unit 11 is moved to one side (first drum 25) under the control of the movement control means 62. That is, the plate making unit 11 moves to the first base paper supply position (the phantom line position in FIG. 1).

  In step S502, a 1-side (first drum 25) discharging operation is performed. The machine control means 59 checks whether or not the stencil sheet 12 is wound around the first drum 25, and if it is wound, performs a plate removal process. The stencil sheet 12 wound around the first drum 25 is in a state where the tip of the stencil sheet 12 floats from the first clamp portion 26. When the first drum 25 rotates and the tip of the stencil sheet 12 that has floated up is positioned in the vicinity of the stencil roll 44, the pair of stencil rolls 44, 44 wind up the tip of the stencil sheet 12. The pair of stencil rolls 44, 44 conveys the stencil sheet 12 into the stencil box 45 as the first drum 25 rotates, so that the stencil sheet 12 is discarded into the stencil box 45.

  In step S503, under the control of the plate making control means 63, one side (first drum 36) plate making is started. Preparation is made to send out the stencil sheet 12 thermally perforated by the thermal head 15 to the first drum 25 side based on the first color plate making data read by the plate making unit 11 by the original reading operation. This process is performed in parallel with the process of step S501 and the process of step S502.

  In step S504, the one-side (first drum 25) master cut confirmation is completed. On the other hand, the first drum 25 is rotated. With the rotation of the first drum 25, the stencil sheet 12 is sent out from the plate making unit 11, and the stencil sheet 12 is wound around the outer peripheral surface of the first drum 25.

  In step S505, the plate making unit 11 is moved to the second side (second drum 36) under the control of the movement control means 62.

  In step S506, the next original is set in the FB (flat bed system). Alternatively, the next document start instruction is executed during AF (auto feeder method).

  In step S507, it is determined whether or not there is a second side (second drum 36) plate making start instruction. When it is determined that the second side (second drum 36) plate making start instruction has been issued, the process proceeds to step S508 and step S509. When it is determined that there is no second side (second drum 36) plate making instruction, the process returns to step S506. The process in step S505 described above is performed in parallel with the processes in step S506 and step S507.

  In step S508, the second-side (second drum 36) discharging operation is performed. In the same manner as described above, the used stencil sheet 12 is removed from the second drum 36, and the newly-made stencil sheet 12 is wound.

  In step S509, under the control of the plate making control means 63, the second side (second drum 36) plate making is started. Preparation is made to send out the stencil sheet 12 thermally perforated by the thermal head 15 to the second drum 36 based on the plate-making data of the second color read by the plate-making unit 11 by the document reading operation. The process in step S508 and the process in step S509 are performed in parallel.

  In step S510, the 2-side (second drum 36) master cut confirmation is completed. When the second side (second drum 36) master cut is confirmed, the second drum 36 is rotated. As the second drum 36 rotates, the stencil sheet 12 is sent out from the plate making unit 11, and the stencil sheet 12 is wound around the outer peripheral surface of the second drum 36.

  In step S511, a two-color printing operation is executed. A main motor (not shown) rotates to rotate the first and second drums 25 and 36, and the printing paper 20 is fed from the paper feeding unit 3 to the first drum 25 in synchronization with this rotation. The fed printing paper 20 is pressed against the stencil sheet 12 of the first drum 25 by the first press roll 27, whereby a first color image is printed on the printing paper 20. The printing paper 20 on which the first color image is printed is peeled off from the outer peripheral surface of the first drum 25 by the separation claw 28, the leading edge separation air, and the separation air, and guided to the intermediate conveyance unit 5. In the intermediate conveyance unit 5, the printing paper 20 is conveyed by the movement of the infinite end belt 32, and the printing paper 20 is fed from the intermediate conveyance unit 5 to the second drum 36. The fed printing paper 20 is pressed against the stencil sheet 12 of the second drum 36 by the second press roll 38, whereby a second color image is printed on the printing paper 20. The printing paper 20 on which the second color image is printed is peeled off from the outer peripheral surface of the second drum 36 by the separation claw 39, the tip separation air, and the separation air, and is guided to the belt conveyance mechanism 42. In the belt conveyance mechanism 42, the printing paper 20 is conveyed by the movement of the endless belt 42 b, and is discharged from the most downstream side of the belt conveyance mechanism 42 to the paper discharge tray 43. The printing paper 20 discharged to the paper discharge tray 43 is placed in a stacked state here.

  The present invention is not limited to the embodiment of the invention described above, and can be implemented in other modes by making appropriate modifications.

  For example, the printing system is configured as follows.

In a printing system in which a computer that transmits print data to a printing apparatus including a plurality of drums and a plate making unit that can move between the drums is connected via a network.
The printing apparatus includes a movement control unit that performs control for moving the plate-making unit between the drums, and a plate-making control unit that performs control related to plate-making of each drum, and the control by the movement control unit is being executed. Further, the control by the plate making control means is configured to be executable.

  Further, the computer program is configured as follows.

In a computer program for controlling a printing apparatus comprising a plurality of drums and a plate making unit movable between the drums,
Let the computer function as movement control means for controlling the movement of the plate making unit between the drums and plate making control means for performing control related to plate making of each drum, and during execution of the control by the movement control means, A computer program for causing the control by the plate making control means to execute.

  Further, the computer program may be recorded on a recording medium.

FIG. 2 is a schematic diagram illustrating a schematic configuration of a printing apparatus. It is the schematic explaining the outline of the control structure of a printing apparatus. It is the schematic explaining the structure of the outline of a mechanism control control means. 4 is a flowchart illustrating an operation of a printing apparatus related to PC output. 6 is a flowchart illustrating an operation of a printing apparatus related to FB / AF output.

Explanation of symbols

1 Printing Device 50 Network 51 System Board 52 Mechanical Control Board 53 CPU
54 Memory 55 System Control Unit 56 Panel 57 CPU
58 Memory 59 Machine control means 60 Mechanical unit 61 Command receiving means 62 Movement control means 63 Plate making control means 64 Reply means PC1, PC2 Personal computer

Claims (5)

In a printing apparatus comprising a plurality of drums and a plate making unit movable between the drums,
Movement control means for controlling the plate making unit to move between the drums;
Plate making control means for performing control related to plate making of each drum,
A printing apparatus configured to be able to execute control by the plate making control means during execution of control by the movement control means. The original document for making the drums is configured to be set in the printing apparatus,
The movement control means controls to move the plate making unit to the next plate making target drum side when the plate making of the corresponding drum is completed by the control of the plate making control means regardless of the setting state of the next original. The printing apparatus according to claim 1.   The printing apparatus according to claim 2, wherein the operation control unit switches the plate-making unit to a predetermined operation mode during execution of the control by the plate-making control unit.   The operation mode is preset with a high-speed mode and a normal mode slower than the high-speed mode, and the movement control means switches the plate-making unit to the normal mode during execution of the control by the plate-making control means. The printing apparatus according to claim 3. In the plate making method of a printing apparatus comprising a plurality of drums and a plate making unit movable between the drums,
A step in which a movement control means controls the plate making unit to move between the drums;
A process for controlling the plate making of each drum, and a plate making control means,
A plate making method for a printing apparatus, wherein the control by the plate making control means is executed during the execution of the control by the movement control means.

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