JP5293548B2 - Recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to easily handle a discharged recording medium while improving a throughput of an image recording, when the user continuously records images on a recording medium. <P>SOLUTION: Print command patterns showing execution orders of a plurality of print commands, are created (S303). For respective execution orders related to the print command patterns, a plurality of print discharge patterns showing the print order of a plurality of images related to the respective print order, are created (S304). Print execution time periods for the respective print discharge patterns are estimated (S305), and the print discharge pattern for the shortest print execution time period is determined as the one for making printing (S306). A plurality of images of the respective print commands are printed on paper sheets according to the print order of the print discharge patterns while the plurality of print commands are executed according to the print execution order of the determined print discharge pattern, and the sheets for the respective print commands are discharged to the discharge tray according to the discharge order. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a recording apparatus that records an image on a recording medium by discharging droplets.

  In an ink jet printer, paper on which an image has been printed is dried by ejecting ink droplets, and then discharged onto a paper discharge tray or the like. By increasing the printing speed, the drying time becomes longer than the printing time, and it may not be possible to print the next sheet until the previously printed sheet is dried. The throughput, which is the execution time from the print request to the completion of the discharge of the paper on which the image related to the print request is printed, tends to decrease. In this regard, a technique is known in which the drying time is predicted for each sheet to be continuously printed, and the sheets are sequentially discharged to a plurality of discharge destinations while printing is performed in the order of long drying time (see Patent Document 1). .

JP 2007-296702 A

  However, in the above-described technique, the sheets may be discharged in an order different from the order desired by the user. Therefore, the user must confirm the order of the ejected sheets and rearrange them in the desired order. It is complicated.

  An object of the present invention is to provide a recording apparatus capable of easily processing a recording medium discharged by a user while improving the throughput of image recording when images are continuously recorded on the recording medium. It is in.

The recording apparatus according to the present invention includes a recording head that records an image on a recording medium, a plurality of holding units that hold the recording medium, and a recording medium on which an image is recorded by the recording head is one of the plurality of holding units. A distribution mechanism to supply; a discharge unit that is a discharge destination of the recording medium held in the holding unit; and a discharge mechanism that discharges each recording medium held in any of the plurality of holding units to the discharge unit; Receiving means for receiving image data relating to images recorded on a plurality of recording media, and a recording command including a discharge order that is a sequence in which the recording medium on which each image is recorded is discharged to the discharge unit; and the reception A command storage means for storing a plurality of the recording commands received by the means, and a supply control for controlling the distribution mechanism so that each recording medium on which an image is recorded is supplied to the holding section not holding the recording medium Means, A discharge mechanism control means for controlling the discharge mechanism so that the plurality of recording media are discharged to the discharge section in the order of the discharge order according to the recording command; and a holding time of the recording medium in the holding section from the image data and retention time relation value calculating means for calculating a holding time relation value is a value related to, and retention time relation value storing means for storing the retention time relationship values the retention time relationship value calculation means has calculated, the recording command And one or more related to a plurality of recording commands different from the order in which the receiving unit receives the plurality of recording commands and the receiving order of the plurality of recording commands in the receiving unit based on the retention time relationship value for each sequence, at least the first of all of a recording medium recording medium on which an image has been recorded related to the plurality of recording command from the supply to the holding portion to said discharge And recording command execution time predicting means for predicting the recording command execution time up to and including the time is discharged into parts, the recording command execution plurality of the recording command execution time predicted by the time prediction unit, wherein by said receiving means If the recording command execution time is shorter than the recording command execution time related to the order in which the recording commands are received, the order corresponding to any of the recording command execution times, otherwise, Command execution order determining means for determining the order in which the recording commands are received by the receiving means to be a command execution order that is the order in which images are recorded on a recording medium according to the plurality of recording commands; and the command execution A recording control method for controlling the recording head so that recording of an image on a recording medium according to each recording command is started in the command execution order determined by the order determining means. With steps.

  According to the present invention, it is possible to record an image related to a recording command in a command execution order with a short recording command execution time while maintaining the discharge order in each recording command, improving the throughput of image recording, The user can easily process the discharged recording medium.

  In the present invention, the recording command execution time prediction means is the same as the discharge order for each recording command for each of the receiving order and one or a plurality of orders related to a plurality of recording commands different from the receiving order. Predicting the recording command execution time when the plurality of images are recorded on a recording medium in one or a plurality of recording orders different from the recording order and the discharging order, and the command execution order determining means is configured to predict the recording command execution time. An order related to the plurality of recording commands corresponding to the shortest recording command execution time among the recording command execution times predicted by the means is determined as the command execution order, and the recording control means determines the command execution order. A plurality of recording media related to each recording command in the recording order corresponding to the command execution order determined by the means and the shortest recording command execution time; As the plurality of images is recorded, it is preferable to control the recording head. According to this, since the recording order is optimized, the throughput can be further improved.

Further, in the present invention, the second distribution includes a plurality of the discharge units, and the discharge mechanism discharges the recording medium held in any of the plurality of holding units to any of the plurality of discharge units. It is preferable that the discharge mechanism is controlled so that a recording medium including a mechanism and on which images relating to the plurality of recording commands are recorded is discharged to the plurality of holding units for each recording command. According to this, since the discharge unit is switched for each recording command, the user can easily process the discharged recording medium.

  In the present invention, it is preferable that the command execution order determination unit transmits the determined command execution order to the recording command transmission source. According to this, it is possible to make the user recognize the arrangement order of the recording command units of the recording medium in the discharge unit.

  According to the present invention, it is possible to record an image related to a recording command in a command execution order with a short recording command execution time while maintaining the discharge order in each recording command, improving the throughput of image recording, The user can easily process the discharged recording medium.

1 is a schematic side view of an inkjet printer according to an embodiment of the present invention. It is a functional block diagram of the control apparatus shown in FIG. It is a flowchart of the data processing part shown in FIG. It is a flowchart of the engine control part shown in FIG. 6 is a flowchart of print data reception processing shown in FIG. 4. 5 is a flowchart of the printing process shown in FIG. It is a flowchart of the discharge process shown in FIG. (A) It is the figure which linked | related the conventional printing order and printing table when not performing execution order of a printing command, and printing order optimization. (B) It is a time chart which shows the printing execution time when it prints according to the content of Fig.8 (a). (A) It is the figure which linked | related the printing order and printing table when the printing discharge pattern production | generation part shown in FIG. 4 performed only optimization of the execution order of a printing command. (B) It is a time chart which shows the printing execution time when it prints according to the content of Fig.9 (a). (A) It is the figure which linked | related the printing order and printing table when the printing discharge pattern production | generation part shown in FIG. 4 optimized the execution order of printing instructions, and the printing order. (B) It is a time chart which shows the printing execution time when it prints according to the content of Fig.10 (a).

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the inkjet printer 101 includes a conveyance unit 20, four inkjet heads 1 that eject magenta, cyan, yellow, and black ink droplets onto a sheet P conveyed by the conveyance unit 20, and a guide. 31, nip rollers 32 and 33, a distribution mechanism 34, four drying stages 41 a to 41 d, a discharge mechanism 43, four discharge trays 55 a to 55 d, and a control device 16. In the present embodiment, the sub-scanning direction is a direction parallel to the transport direction when the paper P is transported by the transport unit 20, and the main scanning direction is a direction orthogonal to the sub-scanning direction and along the horizontal plane. Direction.

  The transport unit 20 includes two belt rollers 6, 7, an endless transport belt 8 wound around the rollers 6, 7, and four inkjet heads 1 in a loop of the transport belt 8. And a platen 19 arranged to face each other. The belt roller 6 is a driving roller, and rotates when a driving force is applied from a conveyance motor (not shown). The belt roller 7 is a driven roller and rotates as the conveyor belt 8 travels as the belt roller 6 rotates. The paper P placed on the outer peripheral surface of the transport belt 8 is transported to the right in FIG.

  The four inkjet heads 1 each extend along the main scanning direction and are arranged in parallel to each other in the sub-scanning direction. That is, the ink jet printer 101 is a line type color ink jet printer in which a plurality of ejection openings for ejecting ink droplets are arranged in the main scanning direction. The lower surface of each inkjet head 1 is an ejection surface on which a plurality of ejection ports from which ink droplets are ejected are arranged. The ejection is a long plane in the main scanning direction. Further, the ejection ports are arranged along the main scanning direction of the ejection surface in a range equal to or longer than the length of the paper P in the main scanning direction so that an image can be formed on the entire paper P.

  The platen 19 is disposed so as to be in contact with the inner peripheral surface of the upper loop of the conveyor belt 8, and supports this from the inner peripheral side of the conveyor belt 8. As a result, the outer peripheral surface of the upper loop of the conveyor belt 8 and the ejection surface of the inkjet head 1 are parallel to each other, and a gap having a predetermined interval suitable for image formation is formed. When the paper P transported by the transport belt 8 passes immediately below the four ink jet heads 1, ink droplets of each color are sequentially ejected from the respective ink jet heads 1 toward the upper surface of the paper P, and are then onto the paper P. A desired color image is formed. The sheet P on which the image is formed is further transported to the right in FIG. 1 by the transport unit 20 and reaches the guide 31.

  The guide 31 guides the paper P on which the image transported by the transport unit 20 is formed to the distribution mechanism 34. The nip rollers 32 and 33 apply a conveying force to the paper P by driving the paper P guided by the guide 31 while pinching it.

  The distribution mechanism 34 selectively supplies the paper P on which the image guided by the guide 31 is formed to one of the four drying stages 41a to 41d.

  The drying stages 41a to 41d hold the paper P for drying the paper P on which an image is formed. The paper P distributed by the distribution mechanism 34 is conveyed to the left in FIG. 1 by the nip rollers 42a to 42d corresponding to the drying stages 41a to 41d that are the supply destinations, and reaches the drying stages 41a to 41d. The drying stages 41a to 41d have a holding area where the paper P is placed. The sheet P is held in this holding area by electrostatic adsorption with the printing surface facing the lower open space. This prevents the paper P from curving when it dries. In the inkjet printer 101, each mechanism is arranged so that air flows on the holding regions of the drying stages 41a to 41d and the drying of the paper P held on the holding regions is promoted. In some cases, a drying heater or the like is installed.

  The discharge mechanism 43 includes four nip rollers 43a to 43d and a selection mechanism 45 corresponding to the drying stages 41a to 41d. The discharge mechanism 43 selects the nip rollers 43a to 43d while operating the selection mechanism 45 so as to be connected to any one of the drying stages 41a to 41d and the guides 51a to 51d that guide the paper P to the discharge trays 55a to 55d, respectively. The paper P held on any one of the drying stages 41a to 41d is discharged to any one of the discharge trays 55a to 55d. The four discharge trays 55a to 55d are arranged in the vertical direction in FIG. 1 on the left side of the drying stages 41a to 41d in FIG. In each of the discharge trays 55a to 55d, the sheets P are stacked in the order discharged from the drying stages 41a to 41d.

  Next, the control device 16 will be described with reference to FIG. The control device 16 includes a CPU (Central Processing Unit), a program executed by the CPU, and an EEPROM (Electrically Erasable and Programmable Read Only Memory) that stores data used for these programs in a rewritable manner. It includes RAM (Random Access Memory) for temporary storage. Each functional unit constituting the control device 16 is constructed by cooperation of these hardware and software in the EEPROM. As shown in FIG. 2, the control device 16 includes a data processing unit 61 and an engine control unit 62.

  The data processing unit 61 receives and processes print data transmitted from an upper computer connected to the inkjet printer 101 so as to be able to perform data communication. The engine control unit 62 controls the operation of the inkjet printer 101 so that printing is executed based on the print data processed by the data processing unit 61.

  The data processing unit 61 includes a reception processing unit 70, a print command storage unit 71, a drying time calculation unit 72, and a print information generation unit 73. Every time print data is received from a host computer, the reception processing unit 70 prints image data related to an image to be printed on each sheet P and one or more sheets P from the received print data. A print command including a discharge order that is the order in which the discharged paper P is discharged to the discharge trays 55a to 55d is extracted. The reception processing unit 70 multi-values the extracted image data (for example, gradation data of 256 gradations) related to each print command in accordance with the specifications of the inkjet printer 101. In the present embodiment, since the inkjet printer 101 prints an image with four gradations of large droplets, medium droplets, small droplets, and 0, the image data is converted into four values.

  The print command storage unit 71 stores all of the plurality of print commands extracted by the reception processing unit 70.

  The drying time calculation unit 72 uses the drying stages 41a to 41d to dry the paper P on which the image related to the image data is printed from the image data included in each print command stored in the print command storage unit 71. The drying time (the holding time for which the drying stages 41a to 41d hold the paper P), which is the time required, is calculated. The drying time is calculated from, for example, the dot density per unit area for forming the image printed on the paper P. The drying time becomes longer as the dot density increases. If there is an area where the dot density is high even in a part of the paper P, the time required for drying becomes long. This drying time is one of the retention time-related values of the present invention, and the other is the retention time-related value such as the time for performing curl correction in the holding portion based on the dot density distribution. The holding time relationship value is configured to be calculated by the drying time calculation unit 72.

  The print information generation unit 73 generates print information of an image related to each print command based on each print command stored in the print command storage unit 71. The print information includes the monochrome / color type and the number of pixels of the image, the discharge number indicating the discharge order in which the printed paper P is discharged to the discharge trays 55a to 55d, the drying time calculated by the drying time calculation unit 72, and The print table ID for specifying the print information is included. When print information of all images related to the print command is generated, each print information related to the print command is transmitted to the engine control unit 62 in units of print commands.

  The engine control unit 62 includes a print table storage unit 74, a print discharge pattern generation unit 75, a print time prediction unit 76, a print discharge pattern determination unit 77, a print control unit 78, a supply control unit 79, and discharge control. Part 80. When the print table storage unit 74 receives the print information transmitted from the print information generation unit 73, the print table storage unit 74 stores the received print information as a print table for each print command. Therefore, the same number of print tables as the print commands stored in the print command storage unit 71 are stored in the print table storage unit 74. The print command corresponds to the recording command in the present invention.

  Based on the contents of the print table stored in the print table storage unit 74, the print discharge pattern generation unit 75 executes a plurality of print commands stored in the print command storage unit 71 and a plurality of images related to each print command. A plurality of print discharge patterns indicating the printing order are generated. Specifically, the print discharge pattern generation unit 75 first generates all combinations of the order of a plurality of print commands to be executed as print command patterns. Accordingly, the print command pattern generated by the print discharge pattern generation unit 75 includes the order in which the reception processing unit 70 receives a plurality of print commands (print data) as the execution order of the plurality of print commands, and the reception processing unit 70. One or a plurality of orders related to a plurality of print commands different from the reception order of the plurality of print commands in FIG.

  Next, the print discharge pattern generation unit 75 is based on the print table stored in the print table storage unit 74 and includes a plurality of orders related to a plurality of print commands to be executed included in the previously generated print command pattern. For each, a plurality of print discharge patterns are generated by determining the printing order of the plurality of images included in the print command. This print order includes the same print order as the discharge order of each print command arranged in the order of print commands to be printed, and the combination print order allowed from all other device configurations. ing. Note that the printing order may be determined randomly, or may be generated so that only images whose drying time exceeds a predetermined value are preferentially printed.

  The print time prediction unit 76 prints all images of the plurality of print commands for each of the plurality of print discharge patterns generated by the print discharge pattern generation unit 75 in the execution order and the print order related to the print discharge pattern. In the order of a plurality of print commands to be executed according to the print discharge pattern, and for each print command, when the paper P is discharged to the discharge tray in the discharge order, the first paper P on which an image is printed is A printing execution time, which is a time from when the paper P on which images relating to all print commands are printed, to the discharge trays 55a to 55d from when it is supplied to any one of the drying stages 41a to 41d, is predicted. The start time of the print execution time may be when printing on the paper P is first started or when the paper P to be printed first is fed from the paper feed tray.

  The print discharge pattern determination unit 77 determines the print discharge pattern corresponding to the shortest print execution time among the plurality of print execution times predicted by the print time prediction unit 76 as the print discharge pattern for actual printing. . In addition, the execution order of the plurality of print commands related to the determined print discharge pattern is determined as the command execution order, and the determined command execution order is transmitted to the upper computer.

  Based on the print order of the print discharge pattern determined by the print table stored in the print table storage unit 74 and the print discharge pattern determination unit 77, the print control unit 78 prints the image of the print information related to each print table on the sheet P. The transport unit 20 and the inkjet head 1 are controlled so that printing is performed in order. Note that when all the drying stages 41a to 41d hold the paper P, the print control unit 78 discharges any of the paper P held by the drying stages 41a to 41d to the discharge trays 55a to 55d. Until it is done, printing on the next paper P is suspended.

  The supply control unit 79 controls the distribution mechanism 34 so that the paper P on which the image is printed is supplied to the drying stages 41a to 41d that do not hold the paper P among the four drying stages 41a to 41d. . At this time, the supply controller 79 preferentially supplies the paper P in the order of the drying stages 41a to 41d.

  The discharge control unit 80 prints the paper P held in the drying stages 41a to 41d in the order of command execution related to the print discharge pattern determined by the print discharge pattern determination unit 77, and for each print command. The discharge mechanism 43 is controlled so as to be discharged to the discharge trays 55a to 55d in accordance with the discharge number (discharge order) of the table. At this time, the discharge mechanism 43 may be controlled so as to switch the discharge trays 55a to 55d for each paper P on which an image related to each print command is printed.

  Hereinafter, the operation of the inkjet printer 101 will be described in detail with reference to FIGS. As shown in FIG. 3, when print data including a plurality of print commands is transmitted from a host computer, the reception processing unit 70 of the data processing unit 61 associated with the control device 16 receives the print data (step S101). : The same applies to other steps, hereinafter referred to as S101). When the reception processing unit 70 receives the print data, the reception processing unit 70 performs data processing on the received print data to extract a plurality of print commands including the quaternized image data and the discharge order (S102). . The plurality of print commands extracted by the reception processing unit 70 are stored in the print command storage unit 71 (S103).

  When a new print command is stored in the print command storage unit 71, the dry time calculation unit 72 calculates the dry time related to the image related to the image data from the image data included in the print command (S104). Then, the print information generation unit 73 generates print information for each image related to the print command (S105) and transmits it to the engine control unit 62 (S106).

  As shown in FIG. 4, the engine control unit 62 sequentially repeats the print data reception process (S201), the print process (S202), and the discharge process (S203). Hereinafter, the print data reception process, the print process, and the discharge process will be described in order. As shown in FIG. 5, when the print data reception process is started, the engine control unit 62 determines whether or not print information including a plurality of print commands transmitted from the print information generation unit 73 has been received ( S301). If the print information has not been received (S301: NO), the engine control unit 62 determines that print data has not been transmitted from the host computer, and ends the print data reception process.

  If the print information has been received (S301: YES), the engine control unit 62 stores the received print information in the print table storage unit 74 as print tables related to a plurality of print commands (S302: FIGS. 8 to 10). reference). Then, the print discharge pattern generation unit 75 generates all combinations of the order of print commands for starting printing as print command patterns (S303). Subsequently, based on the print table stored in the print table storage unit 74, the print discharge pattern generation unit 75 performs a print command for each of the execution orders of the plurality of print commands included in the previously generated print command pattern. A plurality of print discharge patterns are generated by determining the printing order of a plurality of images related to all the print commands stored in the storage unit 71 (S304). Then, the printing time predicting unit 76 predicts the printing execution time for each time when each image is printed on the paper P according to the plurality of printing discharge patterns generated by the printing discharge pattern generation unit 75 (S305). Further, printing when the print discharge pattern determination unit 77 actually prints the print discharge pattern corresponding to the shortest print execution time among the print execution times in the plurality of print orders predicted by the print time prediction unit 76. The discharge pattern is determined (S306), and the execution order of a plurality of print commands related to the determined print discharge pattern is transmitted to the upper computer as the command execution order (S307). Thus, the print data reception process ends.

  As shown in FIG. 6, when the printing process is started, it is determined whether or not a printing table is stored in the printing table storage unit 74 (S401). If no print table is stored in the print table storage unit 74 (S401: NO), it is determined that print data has not been transmitted from the host computer, and the printing process is terminated.

  If the print table is stored in the print table storage unit 74 (S401: YES), the print control unit 78 determines the print discharge determined by the print discharge pattern determination unit 77 from the print table stored in the print table storage unit 74. A print table ID of print information to be printed is specified in accordance with the pattern printing order, and image data corresponding to the specified print table ID is transferred to the inkjet head 1 (S402). Further, the print control unit 78 controls the transport unit 20 and the inkjet head 1 so that the image related to the image data is printed on the paper P (S403). The supply control unit 79 controls the distribution mechanism 34 so that the paper P on which the image is printed is supplied to the drying stages 41a to 41d that do not hold the paper P among the four drying stages 41a to 41d. (S404). Thus, the printing process is finished.

  As shown in FIG. 7, when the discharge process is started, the discharge control unit 80 determines which of the drying stages 41 a to 41 d is the sheet P to be discharged next according to the print discharge pattern determined by the print discharge pattern determination unit 77. It is determined whether it is held in (S501). If the discharge control unit 80 determines that the paper P is not held by the drying stages 41a to 41d (S501: NO), the discharge process ends.

  If the discharge control unit 80 determines that the paper P is held on the drying stages 41a to 41d (S501: YES), the discharge control unit 80 performs drying corresponding to the time since the paper P was held on the drying stages 41a to 41d. It is determined whether or not the time has passed (S502). If the drying time has not elapsed (S502: NO), the discharge process is terminated.

  If the drying time has elapsed (S502: YES), the discharge control unit 80 controls the discharge mechanism 43 so that the paper P is discharged from the drying stages 41a to 41d to the discharge trays 55a to 55d (S503). . Then, the engine control unit 62 deletes the print information related to the print table ID corresponding to the paper P that has been discharged from the print table (S504). This completes the discharge process. At this time, the discharge mechanism 43 may be controlled to switch the discharge trays 55a to 55d for each print table (each print command).

  In this way, by repeating the print data receiving process, the print process, and the discharge process, the sheets P on which images relating to all print information of the print table related to each print command are printed in the order of execution of the commands are sequentially discharged from the discharge trays 55a to 55a. It is discharged to 55d and printing is completed. At this time, since the corresponding print information is deleted every time the paper P is discharged to the discharge trays 55a to 55d, all the contents of the print table are cleared when printing is completed.

  The above control result will be described together with a specific example with reference to FIGS. In the following description, the inkjet printer 101 has print data including two print commands (print command 1 and print command 2: numbers correspond to the reception order) as shown in FIG. The case of receiving will be described. 8B, 9B, and 10B, the paper P on which the image is printed is indicated by a print command number and a discharge number. For example, the paper P on which an image related to the discharge number 4 of the print command 1 is printed is indicated as 1-4. Further, it takes 1 second for the paper P on which the image is printed to be supplied to the drying stages 41a to 41d, and the paper P held on the drying stages 41a to 41d is discharged to the discharge trays 55a to 55d. The time required is 1 second.

  As shown in FIG. 8, the execution order of the print commands 1 and 2 is changed from the print command 1 to the print command 2 as the reception order, and the print order is not optimized, and the print commands 1 and 2 are arranged according to the discharge number. In the conventional case where printing is performed in the printing order, the print command execution time required between the drying stage and the discharge tray is 16 seconds. On the other hand, as shown in FIG. 9, when the execution order of the print commands 1 and 2 is optimized, the print order is optimized when printing is performed in the order of print command 2 → print command 1. Even if not, the printing execution time required between the drying stage and the discharge tray is 14 seconds, and the printing execution time is shortened by 2 seconds compared to the conventional case.

  As shown in FIG. 10, as a result of optimization of the execution order of the print command and optimization of the print order, the order of the print command 2 → the print command 1 and the discharge number 1 → the discharge number for the print command 2 When printing is performed in the order of 2 → discharge number 4 → discharge number 3, the print execution time required between the drying stage and the discharge tray is 13 seconds, and the print execution time is 3 seconds shorter than before. . In this way, it is possible to obtain the effect of improving the throughput by optimizing only the execution order of the print command, and further, the effect of further improving the throughput by optimizing the execution order of the print command and the print order. Can be obtained.

  As described above, according to the ink jet printer 101 of the present embodiment, when the paper P is discharged to the discharge trays 55a to 55d, the command execution time is the shortest while the discharge order is maintained for each print command. Since printing of images according to each print command is started in order, the user can easily process the discharged paper P while improving the throughput of image printing.

  Further, the print discharge pattern generation unit 75 generates a plurality of print discharge patterns indicating the execution order of the plurality of print commands stored in the print command storage unit 71 and the print order of the plurality of images related to each print command. The print discharge pattern determination unit 77 uses the print discharge pattern corresponding to the shortest print execution time among the plurality of print discharge patterns generated by the print discharge pattern generation unit 75 as the print discharge pattern for actual printing. decide. Thus, printing is performed based on the print discharge pattern optimized not only for the execution order of the plurality of print commands but also for the print order of the plurality of images according to each print command, thereby further improving the throughput of image printing.

  At this time, since the execution order and the discharge order to the discharge trays 55a to 55d related to a plurality of print commands are both the command execution order, data processing is facilitated.

  In addition, the user can easily process the discharged paper P by switching the discharge trays 55a to 55d for each print command.

  Further, since the print discharge pattern determining unit 77 transmits the command execution order to the upper computer, the contents of the command execution order received by the upper computer are displayed to the user, whereby the sheets in the discharge trays 55a to 55d are displayed. The arrangement order of P print command units can be recognized. Thereby, a user's sort operation becomes easy.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. In the above-described embodiment, the print discharge pattern generation unit 75 is configured to generate a print discharge pattern considering a combination of print orders. However, the print discharge pattern generation unit only prints a print discharge pattern related to the same print order as the discharge order. The structure which produces | generates may be sufficient. In this case, since the command execution order is determined only by the combination of the order of print commands for starting printing, data processing is facilitated.

  In the above-described embodiment, the print discharge pattern corresponding to the shortest print execution time among the plurality of print execution times predicted by the print time prediction unit 76 is determined as the print discharge pattern for actual printing. However, if the print execution time is shorter than the print execution time when each image is printed in the same order as the discharge order for each print command, the print execution pattern is actually printed. It may be determined as a print discharge pattern when performing.

  Further, the data related to the plurality of print commands does not necessarily include all data transmitted from the host computer at the same time, and may be a part of the data. If the image data corresponding to at least two print commands and a plurality of sheets P constituting each print command are included, the effect of the present invention can be obtained.

  Furthermore, in the above-described embodiment, the print discharge pattern determination unit 77 is configured to transmit the command execution order related to the determined print discharge pattern to the host computer, but may be configured not to transmit. Further, the information transmitted to the upper computer may include information on which of the discharge trays 55a to 55d the sheet P on which the image related to the print command is recorded. Thus, the user can easily process the discharged paper P.

  In the above-described embodiment, the print order related to the print discharge pattern is determined based on the dry time. However, the print order may be determined based on other parameters related to the dry time. For example, the total amount of ink ejected on the paper P or the maximum amount per unit area may be calculated from the image data, and the printing order may be determined based on the calculated value. Further, the drying time may be calculated in consideration of the time for performing the curl correction in the holding unit according to the dot density distribution.

  In FIG. 1, the configuration for performing double-sided printing such as a switchback mechanism is omitted, but the present invention can also be applied to double-sided printing. Further, the discharge trays 55a to 55d are provided with a switchback mechanism, and the present invention can be applied to double-sided printing by re-feeding the paper P on the conveyor belt 7.

  Furthermore, in the above-described embodiment, the example in which the present invention is applied to the ink jet printer 101 having the drying stages 41a to 41d has been described. However, other mechanisms for holding the paper P, for example, the paper P being curved. The present invention is also applicable to an inkjet printer having an anti-curl mechanism for preventing it.

  The present invention is also applicable to a recording apparatus that ejects liquid other than ink. Further, the present invention is not limited to a printer, and can be applied to a facsimile, a copier, and the like.

DESCRIPTION OF SYMBOLS 1 Inkjet head 16 Control apparatus 34 Distribution mechanism 41a Drying stage 43 Discharge mechanism 55a-55d Discharge tray 61 Data processing part 62 Engine control part 70 Reception process part 71 Print command memory | storage part 72 Drying time calculation part 73 Print information generation part 74 Print table Storage unit 75 Print discharge pattern generation unit 76 Print time prediction unit 77 Print discharge pattern determination unit 78 Print control unit 79 Supply control unit 80 Discharge control unit 101 Inkjet printer

Claims (4)

A recording head for recording an image on a recording medium;
A plurality of holding units for holding the recording medium;
A distribution mechanism for supplying a recording medium on which an image is recorded by the recording head to any of the plurality of holding units;
A discharge unit as a discharge destination of the recording medium held in the holding unit;
A discharge mechanism for discharging each recording medium held in any of the plurality of holding units to the discharge unit;
Receiving means for receiving image data relating to images recorded on a plurality of recording media, and a recording command including a discharge order that is a sequence in which the recording medium on which each image is recorded is discharged to the discharge unit;
Command storage means for storing a plurality of the recording commands received by the receiving means;
Supply control means for controlling the distribution mechanism so that each recording medium on which an image is recorded is supplied to the holding unit not holding the recording medium;
A discharge mechanism control means for controlling the discharge mechanism so that the plurality of recording media are discharged to the discharge section in the order of the discharge order according to the recording command;
Holding time relationship value calculating means for calculating a holding time relationship value that is a value related to the holding time of the recording medium in the holding unit from the image data;
And retention time relation value storing means for storing the retention time relationship values the retention time relationship value calculation means has calculated,
Based on the recording command and the retention time related value, the receiving unit relates to a plurality of recording commands different from the order in which the receiving unit receives the plurality of recording commands and the receiving unit receives the plurality of recording commands. For each of one or a plurality of orders, a time period from when a recording medium on which an image is first recorded is supplied to the holding unit to when all the recording media related to the plurality of recording commands are discharged to the discharge unit is set. Recording command execution time predicting means for predicting the recording command execution time including,
The plurality of recording command execution times predicted by the recording command execution time prediction unit includes the recording command execution time shorter than the recording command execution time according to the order in which the recording commands are received by the receiving unit. In this case, an order corresponding to any one of the recording command execution times is displayed on the recording medium according to the plurality of recording commands, and in other cases, the order in which the recording commands are received by the receiving unit. Command execution order determining means for determining the command execution order that is the order in which recording is performed;
Recording control means for controlling the recording head so that recording of an image on a recording medium according to each recording command is started in the command execution order determined by the command execution order determining means. A recording apparatus. The recording command execution time predicting means includes the same recording order as the discharging order and the discharging order for each recording command for each of the receiving order and one or a plurality of orders related to a plurality of recording commands different from the receiving order. Predicting the recording command execution time when recording the plurality of images on a recording medium in one or a plurality of recording orders different from the order;
The command execution order determination unit determines the order related to the plurality of recording commands corresponding to the shortest recording command execution time among the recording command execution times predicted by the recording command execution time prediction unit as the command execution order. Decide
The recording control means includes the plurality of recording media associated with each recording instruction in the recording order corresponding to the instruction execution order determined by the instruction execution order determining means and the shortest recording instruction execution time. The recording apparatus according to claim 1, wherein the recording head is controlled so as to record the image. A plurality of the discharge sections, and the discharge mechanism includes a second distribution mechanism that discharges the recording medium held in any of the plurality of holding sections to any of the plurality of discharge sections;
3. The recording according to claim 1, wherein the discharging mechanism is controlled so that a recording medium on which images relating to the plurality of recording commands are recorded is discharged to the plurality of holding units for each recording command. apparatus.   The recording apparatus according to claim 1, wherein the command execution order determination unit transmits the determined command execution order to a transmission source of the recording command.

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