Recording device and method of controlling the same

Abstract

To reduce an amount of waste paper in a recording device for carrying a sheet, when a joint of sheets is detected.SOLUTION: Sheets supplied from a roll are carried by first carrier means and second carrier means downstream of the first carrier means. A pre-discharge carrying amount of the sheets is carried, while a splice part which is a joint between the sheets is detected by a sensor. When the splice part is not detected while the pre-discharge carrying amount of the sheets is carried, the pre-discharge carrying amount is changed in control for starting a discharge of liquid from a head to the sheet.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a recording device that records on roll paper. [Background technology]

[0002] Some recording devices have a paper feeder that supplies sheets from a roll to a recording head and a take-up device that winds up the sheet recorded by the recording head into a roll. In such recording devices, splicing tape is sometimes used to connect the trailing end of a sheet to the leading end of a new roll, or to connect the two parts of a sheet after removing an unnecessary portion during jam clearance. The splice portion (joint) is thicker than the other portions of the sheet and protrudes from the surface of the sheet. Therefore, when recording is performed on the splice portion, the recording head may interfere with the splice portion, potentially damaging the recording head. Patent Document 1 describes a technology that uses an optical sensor on the sheet transport path to detect the splice in the sheet. When a splice is detected, the recording head is capped to protect it, and a certain amount of sheet is transported, preventing recording on the splice and damaging the recording head. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-239715 Summary of the Invention [Problem to be solved by the invention]

[0004] If the sheet is transported to avoid printing on the splice, the transported portion of the sheet becomes waste paper that cannot be used for printing. If a certain amount of sheet is transported each time a splice is detected, the amount of waste paper increases.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to reduce the amount of wasted paper in a recording device that conveys sheets when a seam between sheets is detected. [Means for solving the problem]

[0006] The present invention provides a recording apparatus that records an image by ejecting a liquid onto a sheet supplied from a roll around which the sheet is wound, a first conveying means for conveying the sheet in a conveying direction; a second conveying means disposed downstream of the first conveying means in the conveying direction and configured to convey a sheet; a head that ejects liquid onto a sheet at a position between the first conveying means and the second conveying means in a sheet conveying path; a sensor that detects a splice portion, which is a joint between sheets, at a detection position upstream of the head in the conveying direction; a control means for conveying the sheet a pre-ejection transport amount while inspecting the sheet with the sensor before starting to eject liquid from the head, and for starting to eject liquid from the head onto the sheet if the sensor does not detect the splice portion while the sheet is being conveyed the pre-ejection transport amount; With The recording apparatus is characterized in that the control means changes the pre-ejection transport amount. [Effects of the Invention]

[0007] According to the present invention, in a recording apparatus that conveys sheets when a seam between sheets is detected, This can reduce the amount of paper waste. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing the configuration of a recording apparatus according to an embodiment. [Figure 2] FIG. 2 is a control block diagram of the recording apparatus according to the embodiment. [Figure 3] FIG. 1 is a diagram showing the configuration of a recording apparatus according to an embodiment. [Figure 4]FIG. 1 is a diagram showing the configuration of a recording apparatus according to an embodiment. [Figure 5] 10 is a flowchart showing a recording control according to an embodiment. [Figure 6] 10 is a flowchart showing a process at the start of recording according to an embodiment. [Figure 7] FIG. 10 is a diagram illustrating a recording operation of the embodiment. [Figure 8] 10 is a flowchart showing a process when a jam occurs in the embodiment. [Figure 9] FIG. 10 is a first diagram showing a recording operation when a jam occurs in the embodiment. [Figure 10] 10 is a flowchart showing a standby process according to an embodiment. [Figure 11] FIG. 10 is a second diagram showing the recording operation when a jam occurs in the embodiment. [Figure 12] 10A and 10B are diagrams illustrating a case where conveyance is performed by a user operation when a jam occurs in the embodiment. [Figure 13] FIG. 10 is a diagram illustrating a recording operation in Comparative Example 1. [Figure 14] 10 is a flowchart showing a process at the start of recording in Comparative Example 1. [Figure 15] 10A and 10B are diagrams illustrating a recording operation when a jam occurs in Comparative Example 1. [Figure 16] 10A and 10B are diagrams illustrating a recording operation when a jam occurs in Comparative Example 2. [Figure 17] FIG. 10 is a diagram showing another configuration of the recording apparatus according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, exemplary embodiments for carrying out the present invention will be described with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described in the following examples may be changed as appropriate depending on the configuration of the device to which the present invention is applied and various conditions, and the scope of the present invention is not intended to be limited to the following examples.

[0010] FIG. 1 is a conceptual diagram illustrating the configuration of a recording apparatus 1 (printing apparatus) according to an embodiment. The recording apparatus 1 records an image by ejecting a liquid onto a sheet 20 supplied from a roll 21. The recording apparatus 1 includes a sheet feeder 10, a main transport unit 12, a sub-transport unit 15, and a winding device 17. A dancer roller (not shown) is also provided between the sheet feeder 10 and the winding device 17 for controlling the tension of the sheet 20. The main transport unit 12 is a first transport unit that sandwiches the sheet 20 at a nip portion of a pair of rollers 120 and transports it in a transport direction 18. The sub-transport unit 15 is a second transport unit that sandwiches the sheet 20 at a nip portion of a pair of rollers 150 and transports it in the transport direction 18. The sub-transport unit 15 is disposed downstream of the main transport unit 12 in the transport direction 18 of the sheet 20. The sheet feeder 10, which is a sheet feeder that supplies the sheet 20 from the roll 21, is disposed upstream of the main transport unit 12 in the transport direction 18. A winding device 17, which is a winding section that winds up the sheet 20, is provided downstream of the sub-conveying section 15 in the conveying direction 18.

[0011] 1 conceptually shows the conveyance path 90 of the sheet 20 as being linear, the conveyance path 90 of the actual device does not have to be linear. For example, the conveyance path 90 may have a path extending away from the sheet feeding device 10 where recording is performed, and a path provided below that path where the recorded sheet 20 is dried and cooled. Further, a path provided below that path for conveying the dried and cooled sheet 20 toward the winding device 17 may be provided, and the overall conveyance path may be configured in an S-shape.

[0012] The main transport unit 12 has an encoder 81 that can measure the amount of rotation of the roller pair 120. The encoder 81 is provided at a position on a drive shaft between the roller pair 120 and a motor (not shown) that drives the roller pair 120. The value obtained from the encoder 81 can be used to determine the transport amount of the sheet 20. can be obtained.

[0013] A roll 21 is attached to the paper feeder 10. A splice table 11 and a splice detection unit 30 are provided downstream of the paper feeder 10 in the conveying direction 18. When a user replaces the roll 21, the sheet 20 is cut on the splice table 11 and the roll 21 in the paper feeder 10 is replaced. Then, the rear end of the cut sheet 20 remaining in the recording device 1 is joined to the front end of the new roll 21 with splicing tape (splicing). The portion joined with the splicing tape is called a splice unit 80. The roll 21 can be replaced by pulling the sheet 20 from the new roll 21 set in the paper feeder 10 to the position of the splice table 11 and performing splicing.

[0014] The splice detection unit 30 is a sensor capable of detecting a splice portion 80, which is a joint of the sheet 20, at a detection position upstream of the head 13 in the conveyance direction 18. Downstream of the main conveyance unit 12 in the conveyance direction 18 is a meandering correction device 40 that corrects and stabilizes the position of the sheet 20 in the width direction (a direction perpendicular to the conveyance direction 18 and parallel to the recording surface of the sheet 20; the direction toward the depth of the page in FIG. 1 ) during conveyance, thereby correcting meandering of the sheet 20. Downstream of the meandering correction device 40 in the conveyance direction 18 are heads 13, which serve as recording units, one for each color. The heads 13 eject liquid (ink) onto the sheet 20 at a position between the main conveyance unit 12 and the sub-conveyance unit 15 on the conveyance path 90 of the sheet 20. The heads 13 eject ink onto the sheet 20 conveyed in the conveyance direction 18, thereby performing recording. After recording, the ink ejected onto the sheet 20 is dried and cooled by the fixing unit 14. The fixing unit 14 is equipped with a dryer having a heater and a fan, and drying is performed by the dryer. The fixing unit 14 is further equipped with a cooler having a fan, and after drying by the dryer, the sheet 20 that has been heated by the drying and the ink ejected onto the sheet 20 are cooled by the cooler. After cooling, the sheet 20 passes through a sub-conveyance unit 15. The end of the sheet 20 is connected to a winding device 17, and the conveyed sheet 20 is wound up by the winding device 17.

[0015] The recording device 1 has a housing that houses at least a portion of a conveyance path 90 for the sheet 20. In the embodiment, the recording device 1 has multiple housings (a first housing 50, a second housing 51, and a third housing 52) along the conveyance direction 18. The first housing 50 houses therein a splice detection unit 30, a main conveyance unit 12, and a meandering correction unit 40 on the conveyance path 90. The second housing 51 houses therein a head 13 on the conveyance path 90. The third housing 52 houses therein a fixing unit 14 and a sub-conveyance unit 15 on the conveyance path 90.

[0016] The first housing 50 has an opening 500, a first door 60 that can open and close the opening 500, and a first opening / closing sensor 63 that can detect the opening and closing of the first door 60. A user can operate the sheets 20 on the transport path 90 inside the first housing 50 through the opening 500. The second housing 51 has an opening 510, a second door 61 that can open and close the opening 510, and a second opening / closing sensor 64 that can detect the opening and closing of the second door 61. A user can operate the sheets 20 on the transport path 90 inside the second housing 51 through the opening 510. The third housing 52 has an opening 520, a third door 62 that can open and close the opening 520, and a third opening / closing sensor 65 that can detect the opening and closing of the third door 62. A user can operate the sheets 20 on the transport path 90 inside the third housing 52 through the opening 520.

[0017] The positions of the sheet 20 that can be accessed through each of the multiple openings 500, 510, 520 are different from each other. When the door of each housing is closed, the user cannot operate (access) the sheet 20 on the transport path 90 inside the housing. The first open / close sensor 63, the second open / close sensor 64, and the third open / close sensor 65 detect the open / close state of each door, and the recording device 1 is controlled to perform a recording operation only when it is detected that all doors are closed. This prevents the user from accidentally touching the sheet 20 being transported during the recording operation. Furthermore, when it is necessary for the user to touch the sheet 20 to perform an operation such as clearing a jam, the sheet 20 is controlled to be in a stopped state. That is, the main conveyance unit 12 and the sub-conveyance unit 15 are stopped. In this state, the user can open the doors of each housing and perform operations such as clearing a jam. A door lock mechanism may be provided to restrict the opening and closing of the doors by user operation.

[0018] When a user clears a jammed sheet 20 inside the recording device 1, the user opens the door of the housing that houses the transport path 90 at the position where the jam has occurred in the sheet 20, and removes the jammed portion of the sheet 20. Then, the normal portions of the sheet 20 are spliced ​​together, and the door is closed, thereby clearing the jam. The first housing 50, the second housing 51, and the third housing 52 each include a first jam detection unit 82, a second jam detection unit 83, and a third jam detection unit 84 inside, which can detect if a jam has occurred in the sheet 20 on the transport path 90 inside each housing.

[0019] 2 is a block diagram showing the control configuration of the recording device 1. The recording device 1 has a print engine unit 200 that mainly controls the recording operation, and a controller unit 100 that controls the overall operation of the recording device 1. A print controller 202 of the print engine unit 200 controls the operation of each part of the print engine unit 200 in accordance with instructions from a main controller 101 of the controller unit 100.

[0020] In the controller unit 100, a main controller 101 configured by a CPU controls the entire recording device 1 in accordance with programs and various parameters stored in a ROM 106, using a RAM 105 as a work area. For example, when a recording instruction is input from a host device 300 via a host I / F 102, an image processing unit 107 performs predetermined image processing on the received image data in accordance with instructions from the main controller 101. The main controller 101 then transmits the image data that has undergone image processing to the print engine unit 200 via a print engine I / F 104.

[0021] The recording device 1 may have a storage device I / F to which an external storage device (such as a USB memory) can be connected, and may acquire image data from the connected external storage device. The operation panel 103 has an operation unit through which the user inputs instructions to the recording device 1, and a display unit that notifies the user of the status of the recording device 1. The user can use the operation panel 103 to instruct the start of recording and paper feed operations, set the recording mode (print mode), and view information about the recording device 1. The operation panel 103 may be configured with a touch panel and buttons, for example. It may also be configured so that an external input device such as a mouse or keyboard can be connected to the recording device 1 to input instructions.

[0022] In the print engine unit 200, a print controller 202, which is configured by a CPU, controls the operation of each component of the recording device 1 in accordance with programs and various parameters stored in a ROM 203, using a RAM 204 as a work area. When various commands and image data are received via a controller I / F 201, the print controller 202 temporarily stores them in the RAM 204. The print controller 202 converts the stored image data into print data using an image processing controller 205 so that the head 13 can use it for printing. Once the print data is generated, the print controller 202 causes the head 13 to perform printing based on the print data via a head I / F 206. At this time, the print controller 202 drives the paper feeder 10, main transport unit 12, sub-transport unit 15, and take-up device 17 via a transport control unit 207 to transport the sheet 20. The transport control unit 207 can also detect the transport distance of the sheet 20 from an encoder 81 provided on a pair of rollers 120 of the main transport unit 12. When the print controller 202 receives an instruction (recording instruction, print instruction) to record on the sheet 20 from the controller unit 100, it executes control (recording control) to make the recording device 1 perform a recording operation.

[0023] The head 13 is disposed above the sheet 20 and is configured to be movable in the vertical direction, descending to approach the sheet 20 when recording and ascending to move away from the sheet 20 when maintenance is performed, etc. A head carriage control unit 208 changes the vertical position of the head 13 depending on the operating state of the recording device 1, such as the maintenance state or recording state. An ink supply control unit 209 controls the ink supply unit so that the pressure of ink supplied to the head 13 falls within an appropriate range. When performing maintenance operations on the head 13, a maintenance control unit 210 moves a maintenance unit below the raised head and controls maintenance operations for the head 13, such as capping and wiping.

[0024] (Setting the amount of conveyance before ejection) The effect on the recording device 1 when the splice portion 80 passes through the conveyance path 90 during recording will be described with reference to Figure 3. Because the splice portion 80 is convex with respect to the sheet 20, there is a possibility that conveyance accuracy will decrease when the splice portion 80 passes through the nip portion of the roller pairs 120, 150 in the main conveyance unit 12 and the sub-conveyance unit 15. Furthermore, if the head 13 descends for recording and approaches the sheet 20, and the splice portion 80 passes below the head 13, the convex portion of the splice portion 80 may come into contact with the ejection surface of the head 13, potentially damaging the head 13.

[0025] In order to prevent a decrease in conveyance accuracy and damage to the head 13, in this embodiment, the print controller 202 performs the following recording control when it receives a recording instruction to record on the sheet 20. The recording instruction is input to the controller unit 100 through communication with the host device 300 or by a user operating the operation panel 103 (for example, by operating a button or touch panel).

[0026] The print controller 202 performs a setting process to set the amount (length) of the sheet 20 to be transported before the start of ejection as a pre-ejection transport amount Z. The set pre-ejection transport amount Z is stored in, for example, the RAM 204, and can be referenced in subsequent processing.

[0027] Then, the print controller 202 performs a conveying process of conveying the sheet 20 by the pre-ejection conveyance amount Z while inspecting the sheet 20 with the splice detection unit 30. If the splice detection unit 30 does not detect the splice portion 80 during the conveying process, the print controller 202 starts discharging liquid (ink) from the head 13 onto the sheet 20.

[0028] Here, the distance along the conveyance path 90 between the detection position 30X where the splice detection unit 30 detects the splice portion 80 and the position 15X of the sub-conveyor 15 is defined as the detection distance Ls. In the first recording operation after the recording apparatus 1 is started up, the print controller 202 sets the pre-ejection conveyance amount Z based on the detection distance Ls. In this embodiment, Z = Ls. This allows ejection to begin in a state where the splice portion 80 is not present on the sheet 20 in the range from the splice detection unit 30 to the sub-conveyor 15 on the conveyance path 90.

[0029] Furthermore, in the second and subsequent printing operations after the initial printing instruction, the print controller 202 sets the pre-ejection transport amount Z to 0 (zero). This prevents waste paper from occurring in the second and subsequent printing operations. In the second and subsequent printing operations, it is confirmed that there is no splice portion 80 in the sheet 20 in the range from the splice detection unit 30 to the sub-conveyor unit 15 on the conveyance path 90 at the end of the previous printing operation. Therefore, even if ejection is started without performing pre-ejection transport, there is no decrease in conveyance accuracy or damage to the head 13 due to the splice portion 80.

[0030] (Setting the transport amount before ejection when clearing jam) In this embodiment, the pre-ejection transport amount Z is set appropriately depending on the door (the housing in which the jammed portion is present) that the user opens during jam clearance. A method for setting the pre-ejection transport amount Z when restarting printing after jam processing will be described with reference to Fig. 4. Fig. 4 is a diagram showing door corresponding distances for determining the pre-ejection transport amount corresponding to each door.

[0031] With the door of each housing open, a user can perform operations such as splicing on the sheet 20 on the conveying path 90 inside the housing. The distance along the conveying path 90 between the most upstream position in the conveying direction 18 of the sheet 20 inside the housing that can be operated by the user with the door open (hereinafter referred to as the operable upstream end position) and the position of the sub-conveyor 15 is defined as the door corresponding distance. The door corresponding distance is the distance from the nip portion of the sub-conveyor 15 to the most upstream portion of the sheet 20 on the conveying path 90 inside the housing that can be accessed by the user when the door is opened or closed.

[0032] As shown in FIG. 4 , the door-corresponding distance corresponding to the first door 60 is the distance L1 along the conveying path 90 between the position 15X (position of the nip) of the sub-conveyor 15 and the upstream operable end position 60X of the first door 60. The door-corresponding distance corresponding to the second door 61 is the distance L2 along the conveying path 90 between the position 15X of the sub-conveyor 15 and the upstream operable end position 61X of the second door 61. The door-corresponding distance corresponding to the third door 62 is the distance L3 along the conveying path 90 between the position 15X of the sub-conveyor 15 and the upstream operable end position 62X of the third door 62. Note that in this embodiment, the door-corresponding distance L1 corresponding to the first door 60 is assumed to be equal to the detection distance Ls. That is, the upstream operable end position 60X of the first door 60 is assumed to be the same as the detection position 30X where the splice detection unit 30 detects the splice. Note that the upstream operable end position 60X of the first door 60 and the detection position 30X may be different positions.

[0033] In this embodiment, in a recording operation that is performed in response to a recording instruction after an open / close sensor detects that one of the multiple doors has been opened or closed, the pre-ejection transport amount Z is set based on the door corresponding distance Ln (n=1, 2, 3 in this embodiment) that corresponds to the door that has been opened or closed. That is, when the first door 60 is opened or closed, the pre-ejection transport amount Z is set to L1; when the second door 61 is opened or closed, the pre-ejection transport amount Z is set to L2; and when the third door 62 is opened or closed, the pre-ejection transport amount Z is set to L3.

[0034] When the door is opened and closed during jam clearance, it is assumed that the user will splice the sheet 20 at a location on the transport path 90 within the housing that the user can access. By setting the pre-ejection transport distance Z as in the embodiment, the sheet 20 is transported until the splice portion 80 passes through the nip portion of the sub-transport unit 15 during the recording operation after jam clearance. Furthermore, not only during jam clearance but also when the door is opened and closed while the recording apparatus 1 is in standby mode, an unintended abnormality may occur in the sheet 20 on the transport path 90 within the housing that the user can access. Even in such a case, the sheet 20 is transported until the abnormal portion passes through the nip portion of the sub-transport unit 15 during the recording operation after the door is closed. Then, if the splice detection unit 30 does not detect the splice portion 80 during this transport process, ejection is initiated. Therefore, even if the splice portion 80 occurs during jam clearance by the user, ejection is initiated when there is no splice portion 80 in the sheet 20 along the transport path 90 from the splice detection unit 30 to the sub-transport unit 15. This prevents a decrease in conveyance accuracy and damage to the head 13. Furthermore, the minimum pre-discharge conveyance amount required to convey the splice portion 80 to the downstream side of the sub-conveyor portion 15 is set depending on whether the door is opened or closed, thereby reducing the amount of paper waste caused by the pre-discharge conveyance.

[0035] The pre-ejection transport amount Z may be set based on the door corresponding distance only when the door opening / closing is detected after an abnormality in the sheet 20 is detected by an abnormality detection means that detects an abnormality in the sheet 20 on the transport path 90. An abnormality in the sheet 20 is, for example, the occurrence of a jam, and in this case, the first jam detection unit 82, the second jam detection unit 83, and the third jam detection unit 84 are the abnormality detection means.

[0036] Hereinafter, a specific description will be given of the recording control of the embodiment that makes it possible to suppress the deterioration of conveyance accuracy and damage to the head 13 while reducing the occurrence of paper waste.

[0037] (First recording operation) When a user operates operation panel 103 to instruct a recording operation (printing), print engine unit 200 starts recording control. Note that the recording operation instruction is not limited to being input by a user operation on operation panel 103, but may also be input to controller unit 100 via communication from host device 300. The same applies to input of a recording operation instruction to controller unit 100 in the following description.

[0038] The following describes the first recording operation after starting up the recording device 1. FIG. 5 is a flowchart showing the recording operation. In step S1000 of FIG. 5, the print controller 202 executes a process at the start of recording. FIG. 6 is a flowchart showing the process at the start of recording in this embodiment. In the process at the start of recording in FIG. 6, in step S1801, the print controller 202 determines whether the current recording operation is the first recording operation after starting up the recording device 1. If it is the first recording operation (step S1801: Yes), the print controller 202 executes the process of step S1802. If it is the second or subsequent recording operation after the first recording operation (step S1801: No), the print controller 202 executes the process of step S1803. In this case, since it is the first recording operation, the process of step S1802 is executed.

[0039] In step S1802, the print controller 202 sets the pre-ejection carry amount Z to a default value that is set when the recording apparatus 1 is started. In this embodiment, the default pre-ejection carry amount Z=Ls that is set when the recording apparatus 1 is started. Step S1803, which is executed in the second and subsequent recording operations, will be described later.

[0040] 7A and 7B are diagrams showing the state of the recording device 1 during the first and second and subsequent recording operations. Fig. 7A shows the state of the recording device 1 when the recording start process in step S1000 is completed. The head 13 is in a state where it is separated from the sheet 20.

[0041] Next, in step S1010, the print controller 202 turns on the splice detection of the splice detection unit 30. If the splice 80 passes under the splice detection unit 30 while the following process is being performed, the splice 80 is detected, an error occurs, and the recording operation ends. If the splice 80 is not detected, the following process is performed. Note that the splice detection unit 30 may be capable of detecting any abnormality on the surface of the sheet 20, not just the splice 80.

[0042] In step S1020, the conveyance control unit 207 starts driving control of the sheet feeder 10, the main conveyance unit 12, the sub-conveyance unit 15, and the winding device 17, and starts conveying the sheet 20.

[0043] In step S1100, the print controller 202 waits until the sheet 20 has been conveyed by the pre-ejection conveyance amount Z.

[0044] In step S1110, the print controller 202 sets the pre-ejection carry amount Z=0.

[0045] In step S1200, the head carriage control unit 208 lowers the head 13, and the print controller 202 starts ejection via the head I / F 206.

[0046] In step S1210, when the ejection from the head 13 is completed (recording of the image based on the image data is completed), the head carriage control unit 208 raises the head 13.

[0047] In step S1220, the conveyance control unit 207 waits until the entire area of ​​the sheet 20 on which the image has been recorded reaches the sheet discharge position.

[0048] In step S1230, the conveyance control unit 207 ends the drive control of the sheet feeder 10, the main conveyance unit 12, the sub-conveyance unit 15, and the winding device 17, and stops conveying the sheet 20.

[0049] In step S1240, print controller 202 turns off splice detection by splice detector 30, and the printing operation ends.

[0050] The above sequence is used to perform the first recording operation after startup of the recording device 1. Figure 7(b) shows the state after steps S1010 to S1200 have been performed during the first recording operation. After that, steps S1210 to S1240 are performed, and the recording operation ends. The state of the recording device 1 at this point is shown in Figure 7(c).

[0051] In steps S1020 to S1100, the sheet 20 is transported by a pre-ejection transport amount Z=Ls. Therefore, the splice detection unit 30 confirms that the splice portion 80 is not present in the sheet 20 in the range from the splice detection unit 30 to the sub-transport unit 15 on the transport path 90. Therefore, the splice portion 80 does not pass through the sub-transport unit 15 or the head 13 during the recording operation, which prevents a decrease in transport accuracy and damage to the head during the recording operation. Meanwhile, the length Ls of the sheet 20 becomes waste paper that is not used for recording.

[0052] (Recording operation from the second time onwards) When the first recording operation is completed, the recording device 1 enters a standby state. In the standby state, when the user operates the operation panel 103 to instruct a second recording operation, the recording control of Fig. 5 is started. In the second recording operation, step S1803 is executed in the recording start process of Fig. 6 executed in step S1000.

[0053] In step S1803, the print controller 202 sets the pre-ejection carry amount set in the immediately preceding process as the pre-ejection carry amount Z. In other words, the pre-ejection carry amount last stored in RAM 204 in the previous printing operation is read, and the printing operation is performed based on that. In this embodiment, since the pre-ejection carry amount Z is set to 0 in step S1110 in the first printing operation, the pre-ejection carry amount set in the processing immediately before the second printing operation is 0 (zero).

[0054] Next, the processes of steps S1010 and S1020 are performed, and conveyance begins. In the next step S1100, since the pre-ejection conveyance amount Z=0, the process immediately proceeds to step S1110 and step S1200, and ejection begins. Next, the processes of steps S1200 to S1240 are performed, and the printing operation ends.

[0055] 7(d) shows the state of the recording apparatus 1 at this time. In the second recording operation, the pre-ejection transport amount in step S1100 is zero, so no waste paper occurs.

[0056] (Jam handling (inside the first housing)) Here, a sequence will be described for the case where a jam occurs between step S1200 and step S1210 in the first recording operation, and the second recording operation is performed (the recording operation is resumed) after the jam is cleared. Fig. 8 is a flow chart showing the process when a jam occurs. When a jam is detected by either the first jam detector 82, the second jam detector 83, or the third jam detector 84, 8, the print controller 202 starts the jam occurrence process shown in Fig. 8. Here, an example in which the first jam detection unit 82 detects a jam will be described with reference to Fig. 9. Fig. 9 is a diagram showing the state of the recording device 1 when a jammed section 70 occurs between the splice detection unit 30 and the main transport unit 12 on the transport path 90 inside the first housing 50.

[0057] In step S1900, the print controller 202 stops the ejection from the head 13, and the head carriage control unit 208 raises the head 13. The state of the recording apparatus 1 at this time is as shown in FIG.

[0058] In step S1910, the conveyance control unit 207 stops driving the sheet feeder 10, the main conveyance unit 12, the sub-conveyance unit 15, and the winding device 17, thereby stopping the conveyance of the sheet 20.

[0059] In step S1920, print controller 202 turns off splice detection by splice detection unit 30.

[0060] When the jam handling is complete, the recording device 1 enters a standby state. While the recording device 1 is in standby state, the user can handle the jam. In the example of Figure 9, the user can handle the jam by opening the first door 60 of the first housing 50, cutting out and splicing the jammed portion 70, and then closing the first door 60.

[0061] (Waiting process after jam occurs) After the jam occurrence process of Fig. 8 is completed, the recording apparatus 1 enters a standby state. At this time, the print controller 202 executes the standby process shown in Fig. 10. The flow of the standby process will be explained below. Fig. 10 is a flowchart showing the standby process for setting the pre-ejection transport amount for the next recording operation in accordance with the door that has been opened for jam clearance.

[0062] In step S2010, the print controller 202 determines whether any of the first open / close sensor 63, second open / close sensor 64, and third open / close sensor 65 has detected the door being open (detected open). If it is determined that any of the open / close sensors has detected the door being open (step S2010: Yes), the process proceeds to step S2100. If none of the open / close sensors has detected the door being open (step S2010: No), the process proceeds to step S2020. Here, it is assumed that the first open / close sensor 63 has detected the door being open because the user has opened the first door 60. The state of the recording device 1 at this time is shown in FIG. 9(b). In this state, the user clears the jammed sheet 20 in the first housing 50, splices the sheets, and closes the first door 60. The state of the recording device 1 at this time is shown in FIG. 9(c).

[0063] In step S2100, the print controller 202 determines whether the open / close sensor has detected (closed detection) that the door opened in step S2010 has been closed. If closed detection is performed (step S2100: Yes), the print controller 202 proceeds to step S2110. If closed detection is not performed (step S2100: No), the print controller 202 executes step S2100 again.

[0064] In step S2110, the print controller 202 compares the pre-ejection conveyance amount Z with the door corresponding distance Ln (n = 1, 2, 3) corresponding to the door whose opening was detected in step S2010. Here, the pre-ejection conveyance amount Z to be compared is the pre-ejection conveyance amount Z set in the previous process and stored in the RAM 204. Here, since the first open / close sensor 63 detected the opening of the first door 60, the door corresponding distance Ln = L1. Therefore, here it is determined whether Z < L1. If Z < L1, it proceeds to step S2120. If Z is not less than L1, it returns to step S2010. Here, since it is a jam occurrence after the pre-ejection conveyance amount Z was set to 0 in step S1110 of FIG. 5, Z = 0, and Z < L1 holds, so it proceeds to step S2120. In step S2120, the pre-ejection conveyance amount Z is set based on the door corresponding distance Ln corresponding to the door whose opening was detected in step S2010. In the embodiment, the pre-ejection conveyance amount Z is set to the door corresponding distance Ln. Here, since the detected door is the first door 60, Z is updated to L1. Then, it returns to step S2010.

[0065]

[0066] ​In step S2020, the print controller 202 determines whether the user has performed an operation to transport the sheet 20 by an arbitrary transport amount (hereinafter referred to as a transport operation) using the operation panel 103. For example, the operation panel 103 has a transport button as an input means, and is configured so that the user can input a transport instruction to transport the sheet 20 by an arbitrary transport amount by pressing the transport button. If it is determined that the user has performed a transport operation using the operation panel 103, the print controller 202 proceeds to step S2200. If it is determined that the user has not performed a transport operation using the operation panel 103, the print controller 202 proceeds to step S2030. The processing from step S2200 onwards will be described later.

[0067] In step S2030, the print controller 202 determines whether the user has performed an operation to instruct the start of a recording operation (hereinafter referred to as a recording start operation) on the operation panel 103. For example, the operation panel 103 has a recording start button, and is configured so that the user can start the recording operation in the recording device 1 by pressing the recording start button. If it is determined that the user has not performed a recording start operation on the operation panel 103, the print controller 202 returns to step S2010. If it is determined that the user has performed a recording start operation on the operation panel 103, the print controller 202 ends the standby process and starts the recording control of FIG. 5.

[0068] The second recording operation is the recording operation that occurs after the jam occurs and is cleared during the first recording operation. This recording operation starts in the state shown in FIG. 9(d) according to the recording control shown in FIG.

[0069] In step S1100, the process waits for the sheet 20 to be conveyed by the pre-ejection conveyance amount Z=L1 set in step S2120, and then proceeds to step S1110. The state of the recording apparatus 1 at this time is shown in FIG. 9(e). The splice unit 80 is located downstream of the sub-conveyance unit 15 in the conveyance direction. This makes it possible to suppress a decrease in conveyance accuracy during the recording operation and damage to the head 13. Also, L1 waste paper occurs.

[0070] (Processing When Jam Occurs (Inside the Second Housing)) As another example, the processing when a jam occurs in the second housing 51 during the first recording operation will be described. FIG. 11 is a diagram showing the state of the recording apparatus 1 when a jam portion 70 occurs in the conveyance path 90 inside the housing of the second housing 51. The state of the recording apparatus 1 at this time is shown in FIG. 11(a). When the recording control shown in FIG. 5 is executed and a jam occurs between step S1200 and step S1210, the jam occurrence processing shown in FIG. 8 is executed. After the completion of the jam occurrence processing, the print controller 202 executes the standby processing shown in FIG. 10. A flow of jam processing during the execution of this standby processing will be described.

[0071] In step S2010, the print controller 202 determines whether any of the opening / closing sensors, i.e., the first opening / closing sensor 63, the second opening / closing sensor 64, or the third opening / closing sensor 65, has detected an open state. Here, it is assumed that the user has opened the second door 61, and thus the second opening / closing sensor 64 has detected an open state. The state of the recording apparatus 1 at this time is shown in FIG. 11(b). In this state, the user performs jam processing on the sheet 20 inside the second housing 51, performs splicing, and closes the second door 61. The state of the recording apparatus 1 at this time is shown in FIG. 11(c).

[0072] In step S2100, if it is determined that the opening / closing sensor that was determined to have detected an open state in step S2010 has detected a closed state, the process proceeds to step S2110.

[0073] In step S2110, the print controller 202 compares the pre-ejection conveyance amount Z with the door corresponding distance Ln corresponding to the door that detected an open state in step S2010. Here, since the second opening / closing sensor 64 has detected the opening of the second door 61, the door corresponding distance Ln = L2. Therefore, here it is determined whether Z < L2. If Z < L2, the process proceeds to step S2120. If Z ≥ L2, the process returns to step S2010. Here, since this is a jam occurrence after the pre-ejection conveyance amount Z = 0 was set in step S1110 of FIG. 5, Z = 0, and Z < L2 holds, so the process proceeds to step S2120.

[0074] In step S2120, the pre-ejection transport amount Z is updated to Ln (here, Z=L2), and then the process returns to step S2010.

[0075] The process proceeds to step S2010, step S2020, and step S2030, and if it is determined that a recording start operation has been performed on operation panel 103, the standby process ends and the recording control of FIG. 5 starts.

[0076] The second recording operation is the recording operation that occurs after the jam occurs and is cleared during the first recording operation. This recording operation starts in the state shown in FIG. 11(d) according to the recording control shown in FIG.

[0077] In step S1100, the process waits for the sheet 20 to be transported by the pre-ejection transport amount Z=L2 set in step S2120, and then proceeds to step S1110. The state of the recording device 1 at this time is shown in Figure 11(e). The splice unit 80 is located downstream of the sub-transport unit 15 in the transport direction. This makes it possible to suppress a decrease in transport accuracy and damage to the head 13 during recording operations. In addition, L2 of wasted paper occurs. This amount of wasted paper L2 is less than the amount of wasted paper L1 when a jam occurs inside the first housing 50.

[0078] Similarly, if a jam occurs inside the third housing 52 during the first recording operation and the third door 62 is opened and closed to clear the jam, the amount of paper wasted during the recording operation will be L3, which is even less than the amounts of paper wasted L1 and L2 when the first door 60 and second door 61 are opened and closed as described above.

[0079] (If multiple doors are opened and closed during standby processing) After the recording operation stopped due to jam occurrence, the user first opened the second door 61. However, it was found that the housing where the jam occurred was the third housing 52. Assume that the user closed the second door 61, opened the third door 62, and performed jam processing. In this case, at step S2110 after the opening and closing of the second door 61, it is determined whether Z < L2. Since Z = 0, at step S2120, Z is set to Z2. At step S2110 after the subsequent opening and closing of the third door 62, it is determined whether Z < L3. Since Z = Z2, Z < L3 does not hold, and the process does not proceed to step S2120, and Z = L2 is maintained. In this case, actually, the splice part 80 is generated by the jam processing in the sheet 20 in the conveyance path 90 within the third housing 52. However, there is a non - zero possibility that some abnormality may occur in the sheet 20 in the conveyance path 90 within the second housing 51 due to the temporary opening of the second housing 51. In the embodiment, in this case, after the sheet 20 at Z2 is conveyed in the recording operation after the standby - time processing, the discharge is started. Therefore, even if some abnormality has occurred in the sheet 20 within the second housing 51, it is possible to suppress the occurrence of a decrease in conveyance accuracy and damage to the head 13 due to this.

[0080] Conversely, after the recording operation stopped due to jam occurrence, the user first opened the second door 61 However, it was found that the housing where the jam occurred was the first housing 50. Assume that the user closed the second door 61, opened the first door 60, and performed jam processing. In this case, at step S2110 after the opening and closing of the second door 61, it is determined whether Z < L2. Since Z = 0, at step S2120, Z is set to Z2. At step S2110 after the subsequent opening and closing of the first door 60, it is determined whether Z < L1. Since Z = Z2, Z < L1 holds, and the process proceeds to step S2120 and Z is updated to Z1.

[0081] In this way, if multiple doors are opened and closed during standby processing, the door corresponding distance Ln corresponding to the door that is furthest upstream in the transport direction is set as the pre-ejection transport amount Z. In other words, in a recording operation after the opening and closing of two or more of the multiple doors is detected, the pre-ejection transport amount Z is set based on the longest door corresponding distance among the two or more doors whose opening and closing is detected. This makes it possible to more reliably prevent a decrease in transport accuracy and damage to the head 13 due to the opening and closing of the doors.

[0082] (If the user is transported during standby processing) The flow will be described when it is determined that the user has performed a transport operation using the operation panel 103 in step S2020 of the standby process. Here, the case where the first door 60 is opened and closed during the standby process will be described as an example. Fig. 12 is a diagram showing the case where transport is performed by a user operation when a jam occurs in this embodiment.

[0083] In step S2200, print controller 202 turns on splice detection in splice detection unit 30.

[0084] In step S2210, while the user is performing a transport operation (for example, pressing the transport button), the print controller 202 drives the sheet feeder 10, the main transport unit 12, the sub transport unit 15, and the winding device 17 via the transport control unit 207 to transport the sheet 20. When the user has finished the transport operation (for example, when the transport button is released), the transport control unit 207 stops transporting the sheet 20.

[0085] In step S2220, the print controller 202 updates the pre-ejection carry amount Z by subtracting the distance carried in step S2210 from the pre-ejection carry amount Z. The state of the recording apparatus 1 at this time is shown in FIG. 12(a). For example, if the user carry amount due to the user's carry operation is U, the pre-ejection carry amount Z set in step S2120 was Z=L1, so in step S2220 it is updated to Z=L1-U. In other words, if a user performs a carry operation after detecting that a door has been opened or closed, the amount obtained by subtracting the user carry amount U from the door corresponding distance Ln of the door whose opening or closing was detected is set as the pre-ejection carry amount Z. The user carry amount U is not used for recording, and therefore becomes wasted paper.

[0086] In step S2230, the print controller 202 turns off splice detection by the splice detection unit 30, and then returns to step S2010. If it is determined in step S2030 that the user has performed a recording start operation on the operation panel 103, the print controller 202 ends the standby process and starts the recording control of FIG.

[0087] The second recording operation is the recording operation that occurs after the jam occurs and is cleared during the first recording operation. This recording operation starts in the state shown in FIG. 12(b) according to the recording control shown in FIG.

[0088] In step S1100, the process waits for the sheet 20 to be conveyed by the pre-ejection conveyance amount Z=L1-U set in step S2220, and then the process proceeds to step S1110. The state of the recording apparatus 1 at this time is shown in FIG. 12(c). The splice unit 80 is positioned at the sub-conveyance unit 15 in the conveyance direction. 1. The printer is located downstream of the printer. Therefore, it is possible to suppress a decrease in transport accuracy during printing operations and damage to the head 13. Also, L1-U waste paper occurs. When combined with the U waste paper that occurred in step S2210 of the standby processing, L1-U+U=L1 waste paper occurs in this series of flows. This amount of waste paper is the same as the amount of waste paper that would occur if user transport had not been performed during standby processing. In other words, L1 waste paper occurs regardless of whether user transport was performed or not.

[0089] The amounts of wasted paper caused by the pre-ejection transport in the first printing operation, the second and subsequent printing operations, and the printing operation after jam clearance in the above-described embodiment can be summarized as follows: (1) Amount of wasted paper in the first printing operation Ls (2) Zero paper waste in the second and subsequent printing operations (3) Amount of wasted paper L1 in a recording operation after a jam occurs during the recording operation and the first door 60 is opened and closed to clear the jam (4) Amount of wasted paper L2 in a recording operation after a jam occurs during the recording operation and the second door 61 is opened and closed to clear the jam (5) Amount of wasted paper L3 in a recording operation after a jam occurs during the recording operation and the third door 62 is opened and closed to clear the jam

[0090] Furthermore, in any recording operation, the splice portion 80 does not pass through the nip portion of the main conveyance unit 12 or the sub-conveyance unit 15, and does not pass under the head 13 at the recording position, thereby suppressing a decrease in conveyance accuracy and damage to the head 13. Therefore, according to the embodiment, by changing the pre-ejection conveyance amount in accordance with the recording conditions, it is possible to suppress a decrease in conveyance accuracy and damage to the head 13 while reducing the amount of paper waste caused by the pre-ejection conveyance.

[0091] A comparative example will be described below to explain the effects of the embodiment.

[0092] <Comparative Example 1> Comparative Example 1 is an example in which the pre-discharge transport amount Z is always set to the detection distance Ls, which is the distance between the sub-transport unit 15 and the splice detection unit 30.

[0093] (First recording operation) When an instruction for the first printing operation after startup of the printing apparatus 1 is input, the printing control of FIG. 5 is started. In step S1000, the print controller 202 executes the printing start processing. In comparative example 1, the printing start processing shown in FIG. 14 is executed. FIG. 14 is a flowchart showing the printing start processing of comparative example 1. In step S1800, the pre-ejection transport amount Z=Ls is set, and the printing start processing ends. FIG. 13 is a diagram showing the operating state of the printing apparatus 1 in comparative example 1. The state of the printing apparatus 1 at this time is shown in FIG. 13(a). The head 13 is separated above the sheet 20.

[0094] After the recording start process is completed, steps S1010 to S1200 are performed. The state of the recording device 1 at this time is shown in Figure 13(b). The splice detection unit 30 has confirmed that there is no splice portion 80 in the sheet 20 in the range from the splice detection unit 30 to the sub-conveyor unit 15 on the conveying path 90. Therefore, the splice portion 80 does not pass through the sub-conveyor unit 15 or the head 13 during the recording operation, which prevents a decrease in conveying accuracy and damage to the head during the recording operation. Meanwhile, a length Ls of the sheet 20 is unused and becomes waste paper.

[0095] After that, the processes from step S1210 to step S1240 are carried out, and the initial recording operation is completed. At this point, the state of the recording device 1 is as shown in FIG.

[0096] (Recording operation from the second time onwards) When the first printing operation is completed, the printing apparatus 1 enters a standby state. When an instruction for a second printing operation is input in the standby state, the printing control of FIG. 5 is started. In the second printing operation, the pre-ejection transport amount Z=Ls is set in step S1000. The state at this point is shown in FIG. 13(a), which is the same as the first printing operation. The subsequent processing is the same as in the first printing operation, and processing from step S1010 to step S1240 is performed, resulting in paper waste of Ls, and then the second printing operation ends.

[0097] (Processing when a jam occurs) A sequence in Comparative Example 1 will be described in which a jam occurs between step S1200 and step S1210 in the first recording operation, and the second recording operation is performed (the recording operation is restarted) after the jam is cleared.

[0098] When a jam is detected in any of the first jam detection unit 82, the second jam detection unit 83, and the third jam detection unit 84, the print controller 202 starts the jam occurrence process shown in Fig. 8. Here, with reference to Fig. 15, an example will be described in which a jammed section 70 occurs between the splice detection unit 30 of the first housing 50 and the main transport unit 12. Fig. 15 is a diagram showing the operating state of the recording device 1 in Comparative Example 1 when a jam occurs.

[0099] The process for handling a jam is the same as in the embodiment. That is, when the process for handling a jam starts, ejection by the head 13 is stopped and the head 13 is raised. The state of the recording device 1 at this time is shown in FIG. 15(a). Then, the conveyance of the sheet 20 is stopped and the splice detection of the splice detection unit 30 is turned off.

[0100] When the jam handling is complete, the recording device 1 enters a standby state. While the recording device 1 is in a standby state, the user can clear the jam. In the example of FIG. 15, the user can clear the jam by opening the first door 60 of the first housing 50, cutting out and splicing the jammed portion 70, and closing the first door 60. The state of the recording device 1 at this time is shown in FIG. 15(b). After the jam handling is complete, the user can operate the operation panel 103 to input a command to resume the recording operation. The state of the recording device 1 at this time is shown in FIG. 15(c).

[0101] The second printing operation can be considered the period from the occurrence of a jam in the first printing operation until the jam is cleared. This printing operation begins according to the printing control shown in FIG. 5. In step S1000, the pre-ejection transport distance Z is set to Ls. The state shown in FIG. 15(d) is the state after steps S1010 through S1200 are performed. The splice detection unit 30 confirms that the splice portion 80 is not present in the sheet 20 in the area from the splice detection unit 30 to the sub-transport unit 15 along the transport path 90. The splice portion 80 is located downstream of the sub-transport unit 15 in the transport direction. Ejection begins from this state. Therefore, the splice portion 80 does not pass the sub-transport unit 15 or the head 13 during the printing operation, preventing a decrease in transport accuracy and head damage during the printing operation. Steps S1210 through S1240 are then performed, and the printing operation after the jam is cleared is completed.

[0102] Compared with the Examples, the amount of paper waste caused by the pre-ejection transport in the second and subsequent recording operations was 0 in the Examples, whereas in Comparative Example 1, Ls of paper waste occurred in every recording operation from the second onwards. Also, in the Examples, the pre-ejection transport amount in the recording operation after jam clearance is set according to the door being opened and closed during jam clearance, whereas in Comparative Example 1, the pre-ejection transport amount in the recording operation after jam clearance is Ls every time. Therefore, the Examples are more advantageous than Comparative Example 1 in terms of reducing the amount of paper waste. The Examples and Comparative Example 1 are equivalent in terms of being able to suppress a decrease in transport accuracy and damage to the head 13 in the first and subsequent recording operations and in recording operations after jam clearance.

[0103] <Comparative Example 2> Comparative Example 2 is an example in which the pre-ejection transport amount Z for the first printing operation is set to the detection distance Ls, and the pre-ejection transport amount Z for the second and subsequent printing operations is always set to zero.

[0104] (First recording operation) When an instruction for the first recording operation after startup of the recording device 1 is input, the recording control of FIG. 5 begins. In step S1000, the print controller 202 executes the recording start process. In comparative example 2, the recording start process shown in FIG. 6 is executed. The recording start process of FIG. 6 is the same as that of the embodiment. The state of the recording device 1 at this time is shown in FIG. 7(a). This recording start process is the only difference from comparative example 1.

[0105] Next, the state after steps S1010 to S1200 is shown in Fig. 7(b). After that, steps S1210 to S1240 are performed, and the recording operation ends. The state of the recording device 1 at this point is shown in Fig. 7(c).

[0106] (Recording operation from the second time onwards) When the first recording operation is completed, the recording device 1 enters a standby state. When an instruction for a second recording operation is input in the standby state, the recording control of Fig. 5 is started. The second recording operation is the same as in the embodiment.

[0107] (Processing when a jam occurs) A sequence in Comparative Example 2 will be described in which a jam occurs between step S1200 and step S1210 in the first recording operation, and the second recording operation is performed (the recording operation is restarted) after the jam is cleared.

[0108] When a jam is detected in any of the first jam detection unit 82, the second jam detection unit 83, and the third jam detection unit 84, the print controller 202 starts the jam occurrence process shown in Fig. 8. Here, with reference to Fig. 16, an example will be described in which a jammed section 70 occurs between the splice detection unit 30 of the first housing 50 and the main transport unit 12. Fig. 16 is a diagram showing the operation of the recording device 1 in Comparative Example 2 when a jam occurs.

[0109] The process for handling a jam is the same as in the embodiment. That is, when the process for handling a jam starts, ejection by the head 13 is stopped and the head 13 is raised. The state of the recording device 1 at this time is as shown in FIG. 16(a). Then, the conveyance of the sheet 20 is stopped and the splice detection of the splice detection unit 30 is turned off.

[0110] When the jam handling is complete, the recording device 1 enters a standby state. While the recording device 1 is in a standby state, the user can clear the jam. In the example of FIG. 16, the user can clear the jam by opening the first door 60 of the first housing 50, cutting out and splicing the jammed portion 70, and closing the first door 60. The state of the recording device 1 at this time is shown in FIG. 16(b). After the jam handling is complete, the user can operate the operation panel 103 to input a command to resume the recording operation. The state of the recording device 1 at this time is shown in FIG. 16(c).

[0111] The printing operation after jamming has occurred in the first printing operation and has been cleared can be considered the second printing operation. This printing operation is started according to the printing control in FIG. 5. In the printing start process executed in step S1000, the pre-ejection carry amount Z is set to the value set immediately before. The pre-ejection carry amount Z set immediately before is 0, which was updated in step S1110 in the first printing operation. Next, processing is performed up to step S1010 and step S1020, and conveyance is started. In the next step S1100, the pre-ejection carry amount Z=0, so the process immediately proceeds to step S1200 via step S1110, and ejection is The state at this point is shown in Figure 16(c).

[0112] In step S1200, the head carriage control unit 208 lowers the head 13, and the print controller 202 starts ejection via the head I / F 206. Subsequently, as transport progresses, the splice portion 80 reaches the nip portion of the main transport unit 12. This state is shown in FIG. 16(d). This state may result in a decrease in transport accuracy due to the convex portion of the splice portion 80 passing through the nip portion. As transport continues, the splice portion 80 reaches below the lowered head 13. This state is shown in FIG. 16(e). This state may result in damage to the head 13 due to the convex portion of the splice portion 80 passing below the lowered head 13. As transport continues, the splice portion 80 reaches the nip portion of the sub-transport unit 15. This state may result in a decrease in transport accuracy, as with the main transport unit 12. Subsequently, steps S1210 to S1240 are performed, and the printing operation ends.

[0113] Compared to the Example, the Example and Comparative Example 2 are equivalent in that the amount of paper waste caused by the pre-ejection transport in the second and subsequent recording operations is zero, and that a decrease in transport accuracy and damage to the head 13 can be suppressed in the first and subsequent recording operations. Furthermore, in the Example, the pre-ejection transport amount in the recording operation after jam clearance is set according to whether the door was opened or closed during jam clearance, whereas in Comparative Example 1, the pre-ejection transport amount in the recording operation after jam clearance is zero every time. Therefore, as described above, in the recording operation after jam clearance, the Example can reduce the amount of paper waste and suppress a decrease in transport accuracy and damage to the head 13, whereas Comparative Example 2 can reduce the amount of paper waste but may cause a decrease in transport accuracy and damage to the head 13. In this respect, the Example is advantageous over Comparative Example 2.

[0114] <Modification of the embodiment> An example where the door corresponding distance L1 when the first door 60 is opened and closed is the same as the distance (detection distance Ls) between the sub-conveying unit 15 and the splice detection unit 30 has been described. However, the door corresponding distance L1 and the detection distance Ls may be different values. For example, the door corresponding distance L1 may be the distance between the most upstream position on the conveyance path 90 of the sheet 20 accessible to the user when the first door 60 is opened and the sub-conveying unit 15. When the most upstream accessible position is downstream of the splice detection unit 30, since L1 < Ls, the amount of waste paper in the recording operation after opening and closing the first door 60 and performing jam processing can be further reduced compared to the embodiment. In this case, the default pre-discharge conveyance amount Z set in the first recording operation after the recording apparatus 1 is activated is the detection distance Ls.

[0115] In the embodiment, an example where the first housing 50 having the splice detection unit 30 inside is the most upstream in the conveyance direction has been described, but the configuration of the recording apparatus 1 is not limited to such a configuration. For example, as shown in FIG. 17, a configuration may be adopted in which a fourth housing 53 having a fourth door 66 and a fourth opening / closing sensor 67 is provided upstream of the first housing 50 having the splice detection unit 30 inside in the conveyance direction. Here, the fourth door 66 is a door such that the position of the sheet 20 in the fourth housing 53 that can be operated by the user when the fourth door 66 is open is upstream of the detection position by the splice detection unit 30 in the conveyance direction. In the case of such a housing configuration, the setting of the pre-discharge conveyance amount Z based on the door corresponding distance Ln may be performed only in the recording operation after the opening and closing of the door whose position of the sheet 20 in the housing that can be operated by the user when the door is open is downstream of the detection position 30X is detected. Therefore, in the recording operation after the opening and closing of the fourth door 66 is detected, the process of setting the pre-discharge conveyance amount Z based on the door corresponding distance L4 corresponding to the fourth door 66 as in the embodiment is not performed. That is, in the standby process of FIG. 10, the fourth door 66 is excluded from the processes of step S2010 to step S2120. In this case, in the recording operation after the opening and closing of the fourth door 66 is detected, the pre-discharge conveyance amount Z = 0 may be set. That is, in the recording operation after the opening and closing of the fourth door 66 is detected, the conveyance in step S1100 Discharge in step S1200 is started without performing the feeding process. Even if a splice or an abnormality occurs in sheet 20 inside fourth housing 53 when fourth door 66 is opened or closed, it is detected by splice detection unit 30. Therefore, the splice or abnormality does not reach main conveyor unit 12 or sub-conveyor unit 15 and reduce the feeding accuracy, or interfere with and damage head 13.

[0116] In the embodiment, the recording apparatus 1 has a configuration in which it has multiple housings (first housing 50, second housing 51, third housing 52) and each housing has a door (first door 60, second door 61, third door 62), but the configuration of the recording apparatus is not limited to this. For example, it may have a single housing that houses the transport path 90 for the sheet 20, and that housing may have multiple doors provided along the transport path 90, so that different positions on the sheet 20 on the transport path 90 can be accessed by opening and closing the doors. In this case, the distance between the most upstream position on the transport path 90 that the user can access with each door open and the sub-transport unit 15 can be the door distance corresponding to each door.

[0117] <Other Examples> The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and having one or more processors in the computer of the system or device read and execute the program. It can also be realized by a circuit (e.g., ASIC) that realizes one or more functions.

[0118] The disclosure of this embodiment includes the following configuration. (Configuration 1) A recording apparatus that records an image by ejecting a liquid onto a sheet supplied from a roll around which the sheet is wound, a first conveying means for conveying the sheet in a conveying direction; a second conveying means disposed downstream of the first conveying means in the conveying direction and configured to convey a sheet; a head that ejects liquid onto a sheet at a position between the first conveying means and the second conveying means in a sheet conveying path; a sensor that detects a splice portion, which is a joint between sheets, at a detection position upstream of the head in the conveying direction; a control means for conveying the sheet a pre-ejection transport amount while inspecting the sheet with the sensor before starting to eject liquid from the head, and for starting to eject liquid from the head onto the sheet if the sensor does not detect the splice portion while the sheet is being conveyed the pre-ejection transport amount; With The recording apparatus is characterized in that the control means changes the pre-ejection transport amount. (Configuration 2) The recording apparatus according to configuration 1, characterized in that, during a first recording operation after startup of the recording apparatus, the control means sets the pre-ejection transport amount based on a detected distance, which is a distance along the transport path between the detection position and the position of the second transport means. (Configuration 3) 3. The recording apparatus according to configuration 2, wherein the control unit sets the pre-ejection transport amount to zero in a second or subsequent recording operation after the first recording operation. (Configuration 4) 4. The recording apparatus according to any one of configurations 1 to 3, wherein the first conveying means and the second conveying means convey the sheet by nipping it between pairs of rollers. (Configuration 5) a sheet feeder that supplies a sheet from a roll to the upstream side of the first conveying means in the conveying direction; 5. The recording device according to any one of configurations 1 to 4, further comprising a unit. (Configuration 6) 6. The recording apparatus according to any one of configurations 1 to 5, further comprising a take-up unit that takes up the sheet, downstream of the second transport means in the transport direction. (Configuration 7) The apparatus further includes a housing that houses at least a portion of the transport path therein, the housing has an opening, a door capable of opening and closing the opening, and an opening / closing sensor capable of detecting opening and closing of the door, and is configured so that operation on the sheet on the conveying path inside the housing can be performed through the opening, The recording device according to any one of configurations 1 to 6, wherein the control means, during a recording operation after the opening / closing of the door is detected by the opening / closing sensor, sets the pre-ejection transport amount based on a door corresponding distance, which is the distance along the transport path between the position of the second transport means and the most upstream position in the transport direction of the sheet in the housing that can be operated by the user when the door is open. (Configuration 8) the housing has a plurality of the openings and the doors along the transport path, and is configured to enable operation on sheets at different positions on the transport path within the housing through each of the plurality of openings; the opening / closing sensor is capable of detecting opening / closing of each of the plurality of doors, The recording device according to configuration 7, wherein the control unit, in a recording operation after the opening / closing sensor detects that any one of the plurality of doors is open or closed, sets the pre-ejection transport amount based on the door corresponding distance corresponding to the door whose opening or closing is detected. (Configuration 9) The recording device according to configuration 8, wherein the control unit, in a recording operation after the open / close sensor detects that two or more of the plurality of doors are open or closed, sets the pre-ejection transport amount based on the longest of the door corresponding distances corresponding to each of the two or more doors whose open or closed state has been detected. (Configuration 10) The recording device according to configuration 8 or 9, wherein the control means sets the pre-ejection transport amount based on the door corresponding distance only in a recording operation after the opening / closing sensor detects the opening or closing of a door among a plurality of doors, the door being operable by a user when the door is open, and the position of the sheet in the housing is downstream of the detection position in the transport direction. (Configuration 11) The apparatus further includes an abnormality detection unit that detects abnormalities in the sheet on the conveying path, The recording device according to any one of configurations 7 to 10, wherein the control means sets the pre-ejection transport amount based on the door corresponding distance only when the opening / closing of the door is detected by the opening / closing sensor after the abnormality detection means detects an abnormality in the sheet. (Configuration 12) The apparatus further includes an input unit that allows a user to input a conveyance instruction for conveying a sheet by an arbitrary conveyance amount, The recording device according to any one of configurations 7 to 11, wherein, when the opening / closing sensor detects that the door is open or closed and the sheet is transported by the transport instruction by a user transport amount, the control means sets the pre-ejection transport amount in a subsequent recording operation based on the amount obtained by subtracting the user transport amount from the door corresponding distance. (Method 1) A control method for a recording device that records an image by ejecting liquid onto a sheet supplied from a roll around which the sheet is wound, comprising: The recording device a first conveying means for conveying the sheet in a conveying direction; a second conveying means disposed downstream of the first conveying means in the conveying direction and configured to convey a sheet; A means of transport; a head that ejects liquid onto a sheet at a position between the first conveying means and the second conveying means in a sheet conveying path; a sensor that detects a splice portion, which is a joint between sheets, at a detection position upstream of the head in the conveying direction; and The control method includes: a conveying step of conveying the sheet by a pre-ejection conveyance amount while inspecting the sheet with the sensor before starting to eject liquid from the head; a step of starting to eject liquid from the head onto the sheet when the splice portion is not detected by the sensor in the conveying step; and a control method for a recording apparatus, the method comprising: changing the pre-ejection transport amount in the transport step; [Explanation of symbols]

[0119] 1: recording device, 12: main transport section, 13: head, 15: sub-transport section, 15X: position of sub-transport section, 18: transport direction, 20: sheet, 21: roll, 30: splice detection section, 30X: detection position, 90: transport path, 100: controller unit, 120: roller pair, 150: roller pair, 200: print engine unit, Z: transport amount before ejection, Ls: detection distance

Claims

1. A recording apparatus that records an image by ejecting a liquid onto a sheet supplied from a roll around which the sheet is wound, a first conveying means for conveying the sheet in a conveying direction; a second conveying means disposed downstream of the first conveying means in the conveying direction and configured to convey a sheet; a head that ejects liquid onto a sheet at a position between the first conveying means and the second conveying means in a sheet conveying path; a sensor that detects a splice portion, which is a joint between sheets, at a detection position upstream of the head in the conveying direction; a control means for conveying the sheet a pre-ejection transport amount while inspecting the sheet with the sensor before starting to eject liquid from the head, and for starting to eject liquid from the head onto the sheet if the sensor does not detect the splice portion while the sheet is being conveyed the pre-ejection transport amount; With The recording apparatus is characterized in that the control means changes the pre-ejection transport amount.

2. The recording apparatus according to claim 1, characterized in that the control means sets the pre-ejection transport amount based on a detected distance, which is the distance along the transport path between the detection position and the position of the second transport means, during the first recording operation after the recording apparatus is started.

3. 3. The recording apparatus according to claim 2, wherein the control unit sets the pre-ejection transport amount to zero in a second or subsequent recording operation after the first recording operation.

4. 4. The recording apparatus according to claim 1, wherein the first conveying means and the second conveying means convey the sheet by nipping it between pairs of rollers.

5. 4. The recording apparatus according to claim 1, further comprising a paper feed unit that supplies a sheet from a roll, the paper feed unit being located upstream of the first transport means in the transport direction.

6. 4. The recording apparatus according to claim 1, further comprising a take-up unit that takes up the sheet, on the downstream side of the second transport means in the transport direction.

7. The apparatus further includes a housing that houses at least a portion of the transport path therein, the housing has an opening, a door capable of opening and closing the opening, and an opening / closing sensor capable of detecting opening and closing of the door, and is configured so that operation on the sheet on the conveying path inside the housing can be performed through the opening, A recording device described in any one of claims 1 to 3, wherein the control means, during a recording operation after the opening and closing of the door is detected by the opening and closing sensor, sets the pre-ejection transport amount based on a door corresponding distance, which is the distance along the transport path between the upstream position in the transport direction of the sheet in the housing that can be operated by the user when the door is open, and the position of the second transport means.

8. the housing has a plurality of the openings and the doors along the transport path, and is configured to enable operation on sheets at different positions on the transport path within the housing through each of the plurality of openings; the opening / closing sensor is capable of detecting opening / closing of each of the plurality of doors, The control means, in a recording operation after the opening / closing sensor detects the opening / closing of any one of the plurality of doors, records the door corresponding to the door whose opening / closing is detected.

8. The recording apparatus according to claim 7, wherein the pre-ejection transport amount is set based on a distance.

9. 9. The recording apparatus according to claim 8, wherein the control unit, in a recording operation after the opening / closing sensor detects that two or more of the plurality of doors are open or closed, sets the pre-ejection transport amount based on the longest of the door corresponding distances corresponding to each of the two or more doors whose opening or closing is detected.

10. The recording device described in claim 8, wherein the control means sets the pre-ejection transport amount based on the door corresponding distance only for recording operations after the opening / closing sensor detects the opening or closing of a door among multiple doors, the door being operable by a user when the door is open, and the position of the sheet inside the housing is downstream of the detection position in the transport direction.

11. The apparatus further includes an abnormality detection unit that detects abnormalities in the sheet on the conveying path, The recording device according to claim 7, wherein the control means sets the pre-ejection transport amount based on the door corresponding distance only when the opening / closing sensor detects the opening or closing of the door after the abnormality detection means detects an abnormality in the sheet.

12. The apparatus further includes an input unit that allows a user to input a conveyance instruction for conveying a sheet by an arbitrary conveyance amount, The recording device according to claim 7, wherein, when the opening / closing sensor detects the opening / closing of the door and the sheet is transported by the transport instruction by the user, the control means sets the pre-ejection transport amount in the subsequent recording operation based on the amount obtained by subtracting the user transport amount from the door corresponding distance.

13. A control method for a recording device that records an image by ejecting liquid onto a sheet supplied from a roll around which the sheet is wound, comprising: The recording device a first conveying means for conveying the sheet in a conveying direction; a second conveying means disposed downstream of the first conveying means in the conveying direction and configured to convey a sheet; a head that ejects liquid onto a sheet at a position between the first conveying means and the second conveying means in a sheet conveying path; a sensor that detects a splice portion, which is a joint between sheets, at a detection position upstream of the head in the conveying direction; and The control method includes: a conveying step of conveying the sheet by a pre-ejection conveyance amount while inspecting the sheet with the sensor before starting to eject liquid from the head; a step of starting to eject liquid from the head onto the sheet when the splice portion is not detected by the sensor in the conveying step; and a control method for a recording apparatus, the method comprising: changing the pre-ejection transport amount in the transport step;

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