Recording device

Abstract

To perform a proper curl-suppressing process.SOLUTION: According to a direction of paper grains relative to a conveyance direction, a specific region is set for which an amount of ink to be applied is determined. On the basis of the amount of applied ink in the set region, the necessity and content of a curl-suppressing process are determined.SELECTED DRAWING: Figure 13

Description

[Technical field]

[0001] The present invention relates to a recording apparatus. [Background technology]

[0002] When ink is applied to a recording medium, the recording medium curls, which may cause a jam during transportation or ejection.

[0003] Patent Document 1 discloses that the execution of curl suppression processing is determined based on the amount of ink applied to predetermined areas at the four corners of a print medium. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication 2019-210068 Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, during the manufacturing process of paper, the fibers flow in a certain direction, which is called the grain of the paper. This grain of the paper also affects how the paper curls when ink is applied to it. For paper whose grain direction is the same as the transport direction of the recording medium, curl suppression processing can be performed according to the amount of ink applied to a specific area on the paper, as in Patent Document 1, but the same process may not be appropriate for paper whose grain direction is different from the transport direction of the recording medium.

[0006] The present invention has been made in view of the above-mentioned problems, and has an object to perform curl suppression processing appropriate for the grain direction of paper. [Means for solving the problem]

[0007] The present invention relates to a recording means for applying ink to paper to perform recording, and a recording device for recording the paper. In the conveying direction A conveying means for conveying the material; a stacking section on which the paper recorded by the recording section and discharged by the conveying section are stacked; and a sorting section that operates to sort the stacked paper; an application amount information acquisition means for acquiring information regarding the amount of ink applied to the paper by the recording means; and a decision means for deciding to execute a suppression process for suppressing curl after recording by the recording means in accordance with the amount of ink applied to a predetermined area of ​​the paper, based on the information acquired by the application amount information acquisition means. ,before The conveying means conveys the paper in a conveying direction. , based on paper type, paper size, and paper feed direction a direction information acquisition means; and a setting means for setting the predetermined area in accordance with a grain direction of the paper with respect to the transport direction indicated by the information acquired by the direction information acquisition means; when sorting is performed by the sorting section, the direction of sorting of the paper loaded on the stacking section is the same when the grain of the paper is parallel to the transport direction and when the grain of the paper is in a direction intersecting the transport direction, the setting means sets the specified area in a corner of the paper, and when the grain of the paper is parallel to the transport direction, sets the length of the specified area in the transport direction to be longer than the length of the direction perpendicular to the transport direction, and the setting means sets the specified area in a corner of the paper, and when the grain of the paper is in a direction intersecting the transport direction, sets the length of the specified area in the transport direction to be shorter than the length of the direction perpendicular to the transport direction. Effect of the Invention

[0008] According to the present invention, the area in which the amount of ink applied is required to suppress curling of the recording medium is changed according to the grain direction of the paper relative to the transport direction, thereby making it possible to perform appropriate curl suppression processing. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a diagram showing the recording apparatus according to the embodiment when in a standby state. [Diagram 2] FIG. 2 is a control configuration diagram of the recording apparatus according to the embodiment. [Diagram 3] FIG. 2 is a diagram showing the recording apparatus according to the embodiment in a recording state. [Figure 4] 4 is a diagram showing a transport path of a recording medium fed from a first cassette in the present embodiment. FIG. [Diagram 5] 11 is a diagram showing a transport path of a recording medium fed from a second cassette in the embodiment. FIG. [Figure 6] 11 is a transport path diagram when a recording operation is performed on the back side of a recording medium in the present embodiment. FIG. [Figure 7] FIG. 2 is a diagram illustrating a state in which the recording apparatus according to the embodiment is in a maintenance state. [Figure 8] 5A and 5B are diagrams illustrating a correspondence relationship between a drive roller and a motor according to the embodiment. [Figure 9]2A and 2B are diagrams showing a schematic configuration of a discharge tray and a moving mechanism of a movable tray according to the embodiment of the present invention; [Figure 10] FIG. 1 is a diagram illustrating the occurrence of curl. [Figure 11] FIG. 13 is a diagram showing an area set when the paper has long grain in the present embodiment. [Figure 12] FIG. 11 is a diagram showing an area set when the paper has a short grain in the present embodiment. [Figure 13] 10 is a flowchart showing a decision process in the present embodiment. [Figure 14] 5 is a flowchart showing a process for determining the grain direction of paper in the present embodiment. [Figure 15] FIG. 4 is a diagram showing a paper grain direction determination table in the present embodiment. [Figure 16] 10 is a graph showing the stop time set according to the grain direction of the paper in the present embodiment. [Figure 17] 5A and 5B are diagrams for explaining correction values ​​based on the type of recording medium and the temperature and humidity environment in the present embodiment. [Figure 18] 3A and 3B are diagrams illustrating a configuration near a discharge tray according to the embodiment. [Figure 19] 11A and 11B are diagrams for explaining correction values ​​based on the load amount and on the presence or absence of sorting processing in the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (First embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] 1 is a diagram showing the internal configuration of an inkjet recording apparatus 1 (hereinafter, recording apparatus 1) used in this embodiment. In the figure, the x direction indicates the horizontal direction, the y direction (perpendicular to the paper surface) indicates the direction in which ejection ports are arranged in a recording head 8 (described later), and the z direction indicates the vertical direction.

[0012] The recording device 1 is a multifunction device equipped with a print unit 2 and a scanner unit 3, and various processes related to recording and reading operations can be executed by the print unit 2 and the scanner unit 3 individually or in conjunction with each other. The scanner unit 3 is equipped with an ADF (automatic document feeder) and an FBS (flatbed scanner), and can read documents automatically fed by the ADF and read (scan) documents placed on the platen of the FBS by a user. Note that although this embodiment is a multifunction device equipped with both the print unit 2 and the scanner unit 3, it may be configured not to include the scanner unit 3. FIG. 1 shows the recording device 1 in a standby state in which neither recording nor reading operations are being performed.

[0013] In the printing section 2, a first cassette 5A and a second cassette 5B for accommodating recording media (cut sheets) S are removably installed at the bottom vertically below the housing 4. The first cassette 5A accommodates relatively small recording media up to A4 size, while the second cassette 5B accommodates relatively large recording media up to A3 size, stacked flat. A first feeding unit 6A is provided near the first cassette 5A for separating and feeding the accommodated recording media one by one. Similarly, a second feeding unit 6B is provided near the second cassette 5B. When a recording operation is performed, the recording media S is selectively fed from one of the cassettes.

[0014] The transport roller 7, discharge roller 12, pinch roller 7a, spur 7b, guide 18, inner guide 19, and flapper 11 constitute a transport mechanism (transport means) for guiding the recording medium S in a predetermined direction. The transport roller 7 is disposed upstream and downstream of the recording head 8 (platen 9) and is a drive roller driven by a transport motor. The pinch roller 7a is a driven roller that nips the recording medium S together with the transport roller 7 and rotates. The discharge roller 12 is disposed downstream of the transport roller 7 and is a drive roller driven by a discharge motor. The spur 7b, together with the transport roller 7 and discharge roller 12 disposed downstream of the recording head 8 (platen 9), pinches and transports the recording medium S.

[0015] The recording device 1 is provided with a plurality of motors for driving the drive rollers, and each of the drive rollers is connected to one of the plurality of motors. The correspondence between the motors and the drive rollers will be described in detail later.

[0016] The guide 18 is provided on the transport path of the recording medium S and guides the recording medium S in a predetermined direction. The inner guide 19 is a member extending in the y direction, has a curved side, and guides the recording medium S along the side. The flapper 11 is a member for switching the direction in which the recording medium S is transported during double-sided recording operation. The discharge tray 13 (loading means) is a tray for loading the recording medium S discharged by the discharge roller 12 after the recording operation is completed.

[0017] The recording head 8 (recording means) of this embodiment is a full-line type color inkjet recording head, and has a plurality of ejection ports arranged in the y direction in FIG. 1, which eject ink according to recording data, corresponding to the width of the recording medium S. When the recording head 8 is in the standby position, the ejection port surface 8a of the recording head 8 faces vertically downward as shown in FIG. 1 and is capped by a cap unit 10. When performing a recording operation, the orientation of the recording head 8 is changed by a print controller 202, which will be described later, so that the ejection port surface 8a faces a platen 9. The platen 9 is formed of a flat plate extending in the y direction, and supports the recording medium S, on which the recording operation is performed by the recording head 8, from the rear. The movement of the recording head 8 from the standby position to the recording position will be described in detail later.

[0018] The ink tank unit 14 stores each of the four colors of ink to be supplied to the recording head 8. The ink supply unit 15 is provided in the middle of a flow path connecting the ink tank unit 14 and the recording head 8, and adjusts the pressure and flow rate of the ink in the recording head 8 to appropriate ranges. In this embodiment, a circulation type ink supply system is adopted, and the ink supply unit 15 adjusts the pressure of the ink supplied to the recording head 8 and the flow rate of the ink collected from the recording head 8 to appropriate ranges.

[0019] The maintenance unit 16 includes a cap unit 10 and a wiping unit 17, and operates these at a predetermined timing to perform a maintenance operation on the recording head 8. The maintenance operation will be described in detail later.

[0020] 2 is a block diagram showing the control configuration of the recording apparatus 1. The control configuration mainly comprises a print engine unit 200 that controls the print section 2, a scanner engine unit 300 that controls the scanner section 3, and a controller unit 100 that controls the entire recording apparatus 1. A print controller 202 controls various mechanisms of the print engine unit 200 according to instructions from a main controller 101 of the controller unit 100. Various mechanisms of the scanner engine unit 300 are controlled by the main controller 101 of the controller unit 100. The control configuration will be described in detail below.

[0021] In the controller unit 100, a main controller 101 constituted by a CPU controls the entire recording device 1 using a RAM 106 as a work area in accordance with programs and various parameters stored in a ROM 107. For example, when a print job is input from a host device 400 via a host I / F 102 or a wireless I / F 103, an image processing unit 108 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 processed image data to a print engine unit 200 via a print engine I / F 105.

[0022] The recording device 1 may obtain image data from the host device 400 via wireless communication or wired communication, or may obtain image data from an external storage device (such as a USB memory) connected to the recording device 1. The communication method used for wireless communication or wired communication is not limited. For example, Wi-Fi (Wireless Fidelity) (registered trademark) or Bluetooth (registered trademark) can be used as a communication method used for wireless communication. Also, USB (Universal Serial Bus) or the like can be used as a communication method used for wired communication. Also, for example, when a read command is input from the host device 400, the main controller 101 transmits the command to the scanner unit 3 via the scanner engine I / F 109.

[0023] The operation panel 104 is a mechanism for a user to perform input and output to the recording device 1. The user can instruct operations such as copying and scanning, set a print mode, and recognize information on the recording device 1 through the operation panel 104. The user can also set whether or not to execute a sorting process, which separates and discharges a predetermined amount of copies, through the operation panel 104. When printing based on a print job input from the host device 400, the sorting process is set in the host device 400. In this embodiment, copying onto the recording medium S by the print unit 2 based on information read by the scanner unit 3 and printing onto the recording medium S by the print unit 2 based on information input from the host device 400 are simply referred to as "recording" as appropriate.

[0024] For example, when copy is selected on operation panel 104 (input panel), a button for setting the magnification and the like is displayed along with a button for setting the sorting process, and whether or not sorting is performed is set according to the selection of this button. Also, in host device 400, a printer properties window is opened in which detailed settings related to printing can be made. The presence or absence of sorting displayed in this window is set according to whether or not a check box is checked. That is, in this embodiment, host device 400 is an external device that can input settings for sorting.

[0025] In the print engine unit 200, a print controller 202 constituted by a CPU controls various mechanisms of the print section 2 according to 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 causes an image processing controller 205 to convert the stored image data into print data so that the print head 8 can use it for a printing operation. When the print data is generated, the print controller 202 causes the print head 8 to execute a printing operation based on the print data via a head I / F 206. At this time, the print controller 202 drives the feeding units 6A and 6B, the conveyance roller 7, the discharge roller 12, and the flapper 11 shown in FIG. 1 via a conveyance control section 207 to convey the recording medium S.

[0026] The transport control unit 207 is connected to a detection unit 212 that detects the transport state of the recording medium S and a drive unit 211 that drives a plurality of drive rollers, and controls the transport of the recording medium S using the drive unit 211 based on the detection result obtained from the detection unit 212. The detection unit 212 has a detection member 20 that detects the presence or absence of the recording medium S and an encoder 21 that detects the amount of rotation of the drive roller.

[0027] During the process in which the recording medium S is conveyed by the conveyance control unit 207, a recording operation is performed by the recording head 8 in accordance with instructions from the print controller 202, and printing processing is performed.

[0028] The head carriage control unit 208 changes the orientation and position of the recording head 8 depending on the operating state, such as the maintenance state and recording state, of the recording device 1. The ink supply control unit 209 controls the ink supply unit 15 so that the pressure of the ink supplied to the recording head 8 falls within an appropriate range. The maintenance control unit 210 controls the operations of the cap unit 10 and the wiping unit 17 in the maintenance unit 16 when performing a maintenance operation on the recording head 8.

[0029] The arm control unit 213 drives a flapper 91 (described later) to control the rotation of an arm 90 (described later) and moves the arm 90 to a retracted position or a detection position. The arm control unit 213 is connected to a load amount detection unit 214 for detecting the load amount of the recording media S on the discharge tray 13 based on the displacement (rotation) of the arm 90. The sort control unit 217 controls the movement of a movable tray 13b (described later) constituting the discharge tray 13 via a drive unit 218 to sort the recording media S to be discharged. The temperature detection unit 219 (temperature detection means) detects the temperature in the environment in which the recording device 1 is installed (or the temperature inside the recording device 1). In addition, the humidity detection unit 220 (humidity detection means) detects the humidity in the environment in which the recording device 1 is installed (or the humidity inside the recording device 1).

[0030] In the scanner engine unit 300, the main controller 101 controls the hardware resources of the scanner controller 302 using the RAM 106 as a work area according to the program and various parameters stored in the ROM 107. This controls various mechanisms of the scanner unit 3. For example, the main controller 101 controls the hardware resources in the scanner controller 302 via the controller I / F 301, so that a document placed on the ADF by a user is conveyed via the conveyance control unit 304 and read by the sensor 305. The scanner controller 302 then stores the read image data in the RAM 303. The print controller 202 can convert the image data acquired as described above into print data, thereby causing the print head 8 to perform a print operation based on the image data read by the scanner controller 302.

[0031] Fig. 3 shows the recording apparatus 1 in a recording state. Compared to the standby state shown in Fig. 1, the cap unit 10 is spaced away from the ejection port surface 8a of the recording head 8, and the ejection port surface 8a faces the platen 9. In this embodiment, the plane of the platen 9 is inclined at about 45 degrees with respect to the horizontal direction, and the ejection port surface 8a of the recording head 8 in the recording position is also inclined at about 45 degrees with respect to the horizontal direction so that the distance from the platen 9 is maintained constant.

[0032] When the recording head 8 moves from the standby position shown in FIG. 1 to the recording position shown in FIG. 3, the print controller 202 uses the maintenance control unit 210 to lower the cap unit 10 to the retracted position shown in FIG. 3. This separates the ejection port surface 8a of the recording head 8 from the cap member. Thereafter, the print controller 202 uses the head carriage control unit 208 to rotate the recording head 8 45 degrees while adjusting the vertical height of the recording head 8, so that the ejection port surface 8a faces the platen 9. When the recording operation is completed and the recording head 8 moves from the recording position to the standby position, the print controller 202 performs the above steps in reverse.

[0033] Next, a description will be given of the transport path of the recording medium S in the printing section 2. When a recording command is input, the print controller 202 first uses the maintenance control section 210 and the head carriage control section 208 to move the recording head 8 to the recording position shown in Fig. 3. Then, the print controller 202 uses the transport control section 207 to drive either the first feeding unit 6A or the second feeding unit 6B in accordance with the recording command, and feeds the recording medium S.

[0034] 4(a) to 4(c) are diagrams showing the conveying path when A4-sized recording media S housed in the first cassette 5A are fed. The topmost recording medium S in the first cassette 5A is separated from the second and subsequent recording media by the first feeding unit 6A, and is conveyed toward the recording area P between the platen 9 and the recording head 8 while being nipped between the conveying roller 7 and the pinch roller 7a. FIG. 4(a) shows the conveying state just before the leading edge of the recording medium S reaches the recording area P. The traveling direction of the recording medium S is changed from the horizontal direction (x direction) to a direction inclined at about 45 degrees from the horizontal direction while being fed by the first feeding unit 6A and reaching the recording area P.

[0035] In the recording area P, ink is ejected from a plurality of ejection ports provided in the recording head 8 toward the recording medium S. The back surface of the recording medium S in the area where the ink is applied is supported by a platen 9, and the distance between the ejection port surface 8a and the recording medium S is kept constant. The recording medium S after the ink is applied passes the left side of the flapper 11, the leading end of which is tilted to the right, while being guided by the transport roller 7 and the spur 7b, and is transported vertically upward in the recording device 1 along the guide 18. FIG. 4(b) shows a state in which the leading end of the recording medium S passes through the recording area P and is transported vertically upward. The traveling direction of the recording medium S is changed vertically upward from the position of the recording area P, which is tilted at about 45 degrees from the horizontal direction, by the transport roller 7 and the spur 7b.

[0036] The recording medium S is transported vertically upward, and then discharged onto the discharge tray 13 by the discharge rollers 12 and spurs 7b. Fig. 4(c) shows the state in which the leading edge of the recording medium S passes through the discharge rollers 12 and is discharged onto the discharge tray 13. The discharged recording medium S is held on the discharge tray 13 with the side on which the image is recorded by the recording head 8 facing down.

[0037] 5(a) to 5(c) are diagrams showing the conveying path when A3 size recording media S contained in the second cassette 5B are fed. The top recording medium S in the second cassette 5B is separated from the second and subsequent recording media by the second feeding unit 6B, and is conveyed toward the recording area P between the platen 9 and the recording head 8 while being nipped between the conveying roller 7 and the pinch roller 7a.

[0038] 5(a) shows a conveying state immediately before the leading edge of the recording medium S reaches the recording area P. A plurality of conveying rollers 7, pinch rollers 7a, and an inner guide 19 are arranged on the conveying path from when the recording medium S is fed by the second feeding unit 6B to when it reaches the recording area P, so that the recording medium S is conveyed to the platen 9 while being curved in an S shape.

[0039] The subsequent transport path is the same as that of the A4-sized recording medium S shown in Figures 4(b) and (c). Figure 5(b) shows the state in which the leading edge of the recording medium S passes through the recording area P and is transported vertically upward. Figure 5(c) shows the state in which the leading edge of the recording medium S passes through the discharge rollers 12 and is discharged onto the discharge tray 13.

[0040] Figures 6(a) to (d) show the transport path when performing a recording operation (double-sided recording) on ​​the back side (second side) of an A4-sized recording medium S. When performing double-sided recording, the first side (front side) is recorded, and then the recording operation is performed on the second side (back side). The transport process when recording on the first side is the same as in Figures 4(a) to (c), so a description thereof will be omitted here. Hereinafter, the transport process from Figure 4(c) onwards will be described.

[0041] When the recording operation on the first side by the recording head 8 is completed and the rear end of the recording medium S passes the flapper 11, the print controller 202 rotates the transport roller 7 in the reverse direction to transport the recording medium S into the recording device 1. At this time, the flapper 11 is controlled by an actuator (not shown) so that its leading end is tilted to the left, so that the leading end of the recording medium S (the rear end in the recording operation on the first side) passes the right side of the flapper 11 and is transported vertically downward. FIG. 6(a) shows the state in which the leading end of the recording medium S (the rear end in the recording operation on the first side) passes the right side of the flapper 11.

[0042] Thereafter, the recording medium S is transported along the curved outer peripheral surface of the inner guide 19, and is transported again to the recording area P between the recording head 8 and the platen 9. At this time, the second surface of the recording medium S faces the ejection port surface 8a of the recording head 8. Fig. 6(b) shows the transport state immediately before the leading edge of the recording medium S reaches the recording area P for the recording operation on the second surface.

[0043] The transport path thereafter is the same as in the case of first-side recording shown in Figures 4(b) and (c). Figure 6(c) shows the state in which the leading edge of the recording medium S passes through the recording area P and is transported vertically upward. At this time, the flapper 11 is controlled by an actuator (not shown) so that the leading edge moves to a position tilted to the right. Figure 6(d) shows the state in which the leading edge of the recording medium S passes through the discharge rollers 12 and is discharged to the discharge tray 13.

[0044] Next, a description will be given of the maintenance operation for the recording head 8. As described in Fig. 1, the maintenance unit 16 of this embodiment includes a cap unit 10 and a wiping unit 17, and performs the maintenance operation by operating these at a predetermined timing.

[0045] Fig. 7 is a diagram showing the recording device 1 in a maintenance state. When moving the recording head 8 from the standby position shown in Fig. 1 to the maintenance position shown in Fig. 7, the print controller 202 moves the recording head 8 upward in the vertical direction and moves the cap unit 10 downward in the vertical direction. Then, the print controller 202 moves the wiping unit 17 from the retracted position to the right in Fig. 7. After that, the print controller 202 moves the recording head 8 downward in the vertical direction to a maintenance position where maintenance operation is possible.

[0046] On the other hand, when the recording head 8 moves from the recording position shown in Fig. 3 to the maintenance position shown in Fig. 7, the print controller 202 moves the recording head 8 vertically upward while rotating it 45 degrees. Then, the print controller 202 moves the wiping unit 17 from the retracted position to the right. After that, the print controller 202 moves the recording head 8 vertically downward to a maintenance position where the maintenance operation by the maintenance unit 16 can be performed.

[0047] 8 is a diagram showing the correspondence between the multiple motors and the drive rollers in the recording device 1. The first feeding motor 22 drives the first feeding unit 6A for feeding the recording medium S from the first cassette 5A. The second feeding motor 23 drives the second feeding unit 6B for feeding the recording medium S from the second cassette 5B. The first transport motor 24 drives the first intermediate roller 71A that first transports the recording medium S fed by the first feeding unit 6A. The second transport motor 25 drives the second intermediate roller 71B that first transports the recording medium S fed by the second feeding unit 6B.

[0048] The main transport motor 26 drives main transport rollers 70, which are disposed upstream of the platen 9 and mainly transport the recording medium S during recording. The main transport motor 26 also drives two transport rollers 7, which are disposed downstream of the platen 9 and transport the recording medium S transported by the main transport rollers 70 further downstream.

[0049] The third transport motor 27 drives two transport rollers 7 that transport downward the recording medium S on which recording has been performed on the first side. The third transport motor 27 also drives two transport rollers 7 that are arranged along the inner guide 19 and transport toward the recording head 8 the recording medium S that has been fed from the second cassette 5B and transported by the second intermediate rollers 71B or the recording medium S on which recording has been performed on the first side and is now inverted.

[0050] The fourth transport motor 28 drives the two transport rollers 7 that transport the recording medium S upward or downward after the recording operation has been performed. The discharge motor 29 drives the discharge rollers 12 that discharge the recording medium S after recording has been performed onto the discharge tray 13. In this manner, each of the two feed motors 22, 23, the five transport motors 24-28, and the discharge motor 29 is associated with one or more drive rollers.

[0051] Meanwhile, detection members 20 for detecting the presence or absence of the recording medium S are disposed at eight locations along the transport path. Each detection member 20 is composed of a sensor and a mirror disposed on either side of the transport path, with the sensor having a light-emitting section and a light-receiving section disposed on one side of the transport path, and the mirror disposed on the other side of the transport path in a position facing the sensor. The presence or absence of the recording medium S, i.e., the passage of the leading or trailing end, is determined depending on whether or not the light-receiving section detects the light emitted from the sensor's light-emitting section being reflected by the mirror.

[0052] The transport control unit 207 individually drives the feed motors 22, 23, transport motors 24-28, and discharge motor 29 based on the detection results of each of the multiple detection members 20 and the output value of an encoder that detects the amount of rotation of each drive roller, thereby controlling transport throughout the entire device.

[0053] Next, a description will be given of the configuration of the discharge tray 13. Fig. 9(a) is a schematic perspective configuration diagram of the discharge tray 13 in the recording apparatus 1. Fig. 9(b) is a schematic configuration diagram of a moving mechanism of the movable tray 13b in the discharge tray 13.

[0054] The discharge tray 13 (loading section) forms an inclined surface that is inclined toward the recording medium S to be discharged, and the recording medium S is loaded on this inclined surface. As shown in FIG. 9(a), the discharge tray 13 includes a fixed tray 13a fixedly provided on a frame that forms the skeleton of the recording device 1, and a movable tray 13b that is provided on the fixed tray 13a so as to be movable in the x direction (a direction perpendicular to the direction in which the recording medium S is discharged). In the discharge tray 13, the fixed tray 13a is located at both ends in the x direction, and the movable tray 13b is located in the center part in the x direction. Therefore, the recording medium S discharged to the discharge tray 13 is mainly loaded on the movable tray 13b. In the discharge tray 13, when a predetermined amount of recording medium S is discharged based on an instruction input by a user, for example, the movable tray 13b can be moved in the forward or backward direction in the x direction to sort the loaded recording media S into predetermined amounts.

[0055] As shown in FIG. 9B, the movable tray 13b (movable part) is configured to be movable in the forward and backward directions in the x direction relative to the fixed tray 13a via a moving mechanism. The fixed tray 13a has a base member 401 extending in the x direction on its back surface (the surface opposite to the surface on which the recording media S are stacked). The base member 401 is provided with a drive unit 218 such as a motor that is driven under the control of the sort control unit 217. The base member 401 is also provided with a pulley 402 that rotates by the drive unit 218, and an idler pulley 404 on which a belt 403 is endlessly stretched between the pulley 402 and the idler pulley 404. The belt 403 stretched between the pulley 402 and the idler pulley 404 extends in the x direction. A driving force transmission unit 405 is fixedly provided on the belt 403. The driving force transmission unit 405 has a connecting portion 405a that connects to a connecting portion 13ba provided on the back surface of the movable tray 13b.

[0056] Therefore, as the belt 403 is rotated by the driving section 218, the driving force transmission unit 405 moves in the forward and backward directions in the x direction. This movement of the driving force transmission unit 405 causes the movable tray 13b connected to the driving force transmission unit 405 via the connecting sections 405a and 13ba to move in the x direction. That is, the driving force of the driving section 218 is transmitted to the movable tray 13b via the belt 403 and the like, and the transmitted driving force moves the movable tray 13b in the forward and backward directions in the x direction.

[0057] <About curling of recording media> Here, the curl of the recording medium S caused by recording will be described. When recording paper is used as the recording medium, the curl caused by the ink discharged from the recording head 8 varies depending on the grain direction of the paper. FIG. 10(a) is a diagram showing the state of curl when the recording medium S, on which ink has been applied evenly over the entire recording surface by the recording device 1, is discharged to the discharge tray 13 without suppressing the curl, in the case where the grain of the recording medium S is vertical, which is parallel to the discharge direction (transport direction) of the recording medium. FIG. 10(b) is a diagram showing the recording medium S discharged to the discharge tray 13 in FIG. 10(a) as viewed from the downstream side toward the upstream side in the discharge direction. FIG. 10(c) is a cross-sectional view of the vicinity of the discharge port 95. Note that in the recording device 1, the recording medium S is discharged face-down, with the recording surface facing downward.

[0058] When the grain direction of the paper is parallel to the discharge direction, the application of ink causes curling at both ends in the width direction intersecting with the discharge direction of the recording medium S, as shown in Fig. 10(a), and both ends lift up from the discharge tray 13 (movable tray 13b). Although not shown, when the grain direction of the paper is transverse, that is, in the direction intersecting with the discharge direction, curling occurs at both ends in the discharge direction of the recording medium S, and both ends lift up from the discharge tray 13 (movable tray 13b). This reduces the contact area with the discharge tray 13, making it unstable. In an unstable state, the position on the discharge tray 13 is easily shifted, and there is a risk that the recording medium S will not be stacked neatly.

[0059] In this embodiment, in the recording process for recording on the recording medium S, the curl suppression process (curl suppression process) is determined based on the amount of ink applied (amount of ink applied) in an area determined according to the grain direction of the recording medium S. Specifically, the monitor value calculated based on the amount of ink applied is compared with a threshold value to determine whether or not the curl suppression process is required.

[0060] The acquisition of the monitor values ​​will be described below. In the following description, the recording medium S is paper unless otherwise specified. Acquisition of the correction values ​​and acquisition of the monitor values ​​based on the correction values ​​are executed by the print controller 202. That is, in this embodiment, the print controller 202 functions as an acquisition unit that acquires the correction values ​​and the monitor values.

[0061] Acquiring correction values ​​based on ink ejection amount FIG. 11(a) is a diagram showing a specified area S0 for calculating the amount of ink to be deposited when the grain of the paper is parallel to the transport direction (vertical grain), and FIG. 11(b) is a table showing the weighting coefficients assigned to each area in the specified area S0.

[0062] In the recording medium S such as recording paper, even if the amount of ink applied is the same, the degree of curl (the amount of curl, i.e., the amount of lift from the movable tray 13b in this embodiment) differs depending on the recording position. Specifically, the closer to the edge of the recording medium S is recorded, the more pronounced the curl. Therefore, in the present invention, the amount of ink applied to a predetermined area S0 in each of the four corners of the recording medium S (amount of ink applied, ratio of ink) is calculated, and a correction value is obtained based on the calculation result of the predetermined area S0 with the largest amount of ink applied among the four predetermined areas S0. The calculation of the ink application amount in the four predetermined areas S0 is executed by the print controller 202. That is, in this embodiment, the print controller 202 functions as a calculation means for calculating the ink application amount.

[0063] In the case of vertical grain, both ends in the width direction are areas that are greatly affected by curling, so the shape of the predetermined area S0 is set so that the sides in the transport direction are long and the sides in the nozzle row direction are short. Each of the four predetermined areas S0 is divided into four in the width direction of the recording medium S (the direction of movement of the movable tray 13b). Specifically, in the width direction, the areas are arranged in the order of area S1, area S2, area S3, and area S4 from the ends of the recording medium S toward the center. The ink deposition amount in each predetermined area S0 is the sum of the values ​​obtained by multiplying the ink deposition amounts in areas S1, S2, S3, and S4 by weighting coefficients.

[0064] That is, when calculating the ink deposition amount for the predetermined region S0, first, the ink deposition amounts for the regions S1, S2, S3, and S4 are calculated based on the input image data. Weighting coefficients are set in advance for the regions S1, S2, S3, and S4 (see FIG. 11(b)). The calculated ink deposition amounts are multiplied by the weighting coefficients set for the corresponding regions. That is, the ink deposition amount for the region S1 is multiplied by a weighting coefficient of "4". The ink deposition amount for the region S2 is multiplied by a weighting coefficient of "3". The ink deposition amount for the region S3 is multiplied by a weighting coefficient of "2". The ink deposition amount for the region S1 is multiplied by a weighting coefficient of "1". Note that the weighting coefficients have higher values ​​closer to the ends in the width direction. After that, the calculated values ​​are added up, and the summed value is regarded as the ink deposition amount for the predetermined region S0.

[0065] In this way, the ink deposition amount is calculated for each of the four predetermined regions S0, and a correction value is obtained based on the ink deposition amount for the predetermined region S0 with the largest calculated value. The correction value is obtained based on the table, for example, in which correction values ​​based on the ink deposition amount are preset and stored in the ROM 203 or the like. Alternatively, a calculation formula using the ink deposition amount as a variable may be stored in the ROM 203 or the like, and the correction value may be obtained based on the calculation formula.

[0066] Fig. 12 is a diagram showing the predetermined area S0 for calculating the amount of ink to be deposited when the grain of the paper is parallel to the transport direction (cross grain). In the case of cross grain, both ends in the transport direction are areas that are greatly affected by curling, so the shape of the predetermined area S0 is set so that the sides in the transport direction are short and the sides in the nozzle row direction are long. The predetermined area S0 is divided into four in the nozzle row direction. Even in the case of cross grain, the weighting coefficients provided for each area in the predetermined area S0 are set as shown in the table in Fig. 11(b).

[0067] The size (area) of the predetermined region S0 may be changed according to various conditions such as the type of recording medium S that can be used and the type of ink used, as long as the relationship between the long side and short side with respect to the grain of the paper is maintained. The position of the predetermined region S0 may be set to be a predetermined distance away from the short side and long side of the recording medium S located nearby, or may be set to be in contact with the short side. The distance from the short side and the distance from the long side may also be different.

[0068] Obtaining monitor values The monitor value is obtained by adding together the correction value based on the ink impact amount, the correction value based on the type of recording medium S, the correction value based on the temperature and humidity environment, the load amount, and the correction value based on the sorting information. For example, if the ink impact amount in each region of the predetermined region S0 is 20, the monitor value is 20 x 4 + 20 x 3 + 20 x 2 + 20 x 1 = 200. The monitor value obtained in this manner is compared with a threshold value, which will be described later, and the curl suppression process is selected and executed.

[0069] The selection of the curl suppression process based on the monitor value is determined based on a threshold value set for the curl suppression process. In this embodiment, the recording device 1 can execute a first curl suppression process and a second curl suppression process in a recording process for recording on the recording medium S. The first curl suppression process reduces the conveying speed in order to hold the recording medium S in the conveying path for a first time. The second curl suppression process reduces the conveying speed and stops the recording medium in the conveying path for a certain time in order to hold the recording medium in the conveying path for a second time longer than the first time. In other words, the second curl suppression process extends the ink drying time by lengthening the retention time of the recording medium in the conveying path compared to the first curl suppression process, and the recording medium can be discharged in a state in which curls generated on the recording medium are sufficiently suppressed.

[0070] A different threshold value is set for each of the first curl suppression process and the second curl suppression process. For example, a first threshold value "220" is set for the first curl suppression process, and a second threshold value "250" that is larger than the first threshold value is set for the second curl suppression process. When the acquired monitor value is less than 220, the curl suppression process is not executed, when the acquired monitor value is equal to or greater than 220 but less than 250, the first curl suppression process is executed, and when the acquired monitor value is equal to or greater than 250, the second curl suppression process is executed. The curl suppression process to be executed is determined by the print controller 202. That is, in this embodiment, the print controller 202 functions as a determination means that can compare the monitor value with the threshold value to determine whether or not to execute the curl suppression process and can determine the curl suppression process to be executed.

[0071] In the above configuration, when the information required for recording on the recording medium S is input and the user instructs to start recording, a determination process is executed to determine the curl suppression process, and then the recording process is executed based on the determined curl suppression process. Fig. 13 is a flowchart showing the detailed processing contents of the determination process. A series of processes shown in the flowchart of Fig. 13 are executed by the print controller 202 expanding the program code stored in the ROM 203 into the RAM 204. Alternatively, some or all of the functions of the steps in Fig. 13 may be realized by hardware such as an ASIC or electronic circuit.

[0072] When the determination process starts, first, the print controller 202 determines the grain direction of the paper (step S1701). Details of this process will be described in Fig. 14. Then, a monitor value is obtained based on the grain direction of the paper and the amount of ink deposited obtained in step S1701 (step S1702).

[0073] Next, in step S1703, it is determined whether the monitor value acquired in step S1702 is equal to or greater than a first threshold. If it is determined that the monitor value is not equal to or greater than the first threshold, it is determined not to execute curl suppression processing (step S1705), and the determination processing ends. Also, if it is determined in step S1703 that the monitor value is equal to or greater than the first threshold, it is determined whether the monitor value is equal to or greater than a second threshold (step S1704).

[0074] If it is determined in step S1704 that the monitor value is not equal to or greater than the second threshold, it is decided to execute the first curl suppression process (step S1707), and the decision means is terminated. That is, in step S1707, it is decided to execute the first curl suppression process, which reduces the conveying speed of the recording medium S during the recording process. Also, if it is determined in step S1704 that the monitor value is equal to or greater than the second threshold, it is decided to execute the second curl suppression process (step S1706), and the decision means is terminated. That is, in step S1706, it is decided to execute the second curl suppression process, which reduces the conveying speed of the recording medium S during the recording process and stops the recording medium S for a certain period of time after recording.

[0075] Thereafter, a recording process is performed based on the curl control process determined in the determination process and various information included in the print job, and recording is performed on the recording medium S. That is, in a recording process in which a first curl suppression process is performed, the conveying speed of the recording medium S is reduced from a preset speed to a speed set as the first curl suppression process, and a recording operation is performed on the recording medium S. In addition, in a recording process in which a second curl suppression process is performed, the conveying speed of the recording medium S is reduced from a preset speed to a speed set as the second curl suppression process, and a recording operation is performed on the recording medium S. Furthermore, the recording medium S after recording is stopped in the conveying path for a certain period of time, and then discharged to the discharge tray 13.

[0076] The recording operation performed while the curl suppression process is being performed is performed while the print controller 202 controls the transport control unit 207 and the recording head 8. That is, in this embodiment, the print controller 202 functions as a recording control unit that performs recording on the recording medium S while performing the curl suppression process.

[0077] Fig. 14 is a flowchart showing the flow of the paper grain direction determination process in step S1701 in Fig. 13. In step S1901, the type of recording medium is obtained. The type of recording medium may be input by the user through operation panel 104, or a sensor for determining the type of recording medium may be provided in the device and the type determined by the sensor may be obtained. In step S1902, the size of the recording medium is obtained. As in step S1901, the size may be input by the user, or the type determined by a sensor for determining the size may be obtained.

[0078] In step S1903, the feed direction of the recording medium is acquired. As in step S1901, the feed direction input by the user may be acquired, or the feed direction determined based on the orientation of the recording medium set in the recording device may be acquired.

[0079] In step S1904, the grain direction of the paper is determined based on the type, size, and feed direction of the recording medium acquired in steps S1901 to S1903. FIG. 15 shows a paper grain direction determination table. This table is stored in ROM 203, and the grain of the paper is determined according to this table. Since it is often determined depending on the type and size of the recording medium, in this embodiment, it is set in advance in a table. The determination process of FIG. 13 is performed based on the grain direction of the paper relative to the transport direction determined in this way. If the user is able to determine the grain direction of the paper, the user may input the grain direction of the paper.

[0080] As described above, by determining whether or not to perform curl suppression processing and the level of curl suppression processing based on the grain direction of the paper relative to the transport direction, it is possible to perform appropriate curl suppression processing, thereby preventing jams from occurring and preventing a decrease in printing speed due to unnecessary curl suppression processing.

[0081] Second Embodiment In this embodiment, curl suppression processing is performed differently from that in the first embodiment, and the differences from the first embodiment will be mainly described.

[0082] In this embodiment, in the recording process in which the second curl suppression process is performed, the conveying speed of the recording medium S is reduced from a preset speed to a speed set as the second curl suppression process, and the recording operation is performed on the recording medium S. Furthermore, the recording medium S after recording is stopped in the conveying path for a certain period of time, and then discharged to the discharge tray 13. FIG. 16 is a graph showing the stop time set according to the grain direction of the paper, which is the time for stopping the recording medium S after recording in the conveying path for a certain period of time. In this embodiment, as shown in FIG. 16, a table is provided that changes the time for stopping the recording medium S after recording in the conveying path for a certain period of time according to the paper type, etc. Furthermore, as shown in FIG. 16(a)(b), by changing this table according to the grain direction of the paper, it becomes possible to set the stop time so that the curl suppression effect can be obtained more efficiently.

[0083] (Third embodiment) In the above-described embodiment, the curl suppression process is determined based only on the amount of ink applied. In the present embodiment, the curl suppression process is determined based on other conditions as well.

[0084] In this embodiment, the process is based on four conditions. The four conditions are the ink ejection amount, the type of recording medium S, the temperature and humidity environment, the load amount, and sorting information. A correction value is obtained for each condition, and the sum of the obtained correction values ​​is obtained as a monitor value. The obtained monitor value is compared with a threshold value corresponding to the curl suppression process, and the curl suppression process is determined based on the comparison result.

[0085] <Acquisition of correction values ​​based on the type of recording medium S, and acquisition of correction values ​​based on temperature and humidity environment> FIG. 17(a) is a table showing correction values ​​set according to the type of recording medium S, and FIG. 17(b) is a table showing correction values ​​set according to combinations of temperature and humidity.

[0086] A table (see FIG. 17(a)) in which correction values ​​according to the type of recording medium S are set is stored, for example, in the ROM 203. The correction value based on the type of recording medium S is obtained from the stored table based on the input information on the type of recording medium S.

[0087] Also, a table (see FIG. 17(b)) in which correction values ​​corresponding to combinations of temperature and humidity are set is stored, for example, in the ROM 203. The correction value based on the temperature and humidity environment is obtained from the stored table based on the detection results detected by the temperature detection unit 219 and the humidity detection unit 220.

[0088] It should be noted that the correction values ​​set in the tables of Figs. 17(a) and (b) are larger as the curl caused by application of ink becomes larger. The correction values ​​are not limited to the values ​​shown in Figs. 17(a) and (b). That is, they can be changed according to the type of ink used. Furthermore, the correction values ​​based on the temperature and humidity environment are obtained using a table such as that shown in Fig. 17(b), but are not limited to this. That is, a formula with information on temperature and humidity as variables may be stored in ROM 203 or the like, and the correction values ​​may be calculated based on this formula.

[0089] Obtaining correction values ​​based on load and sorting information In the case of grain paper, in which the grain direction of the recording medium is parallel to the transport direction, when curling occurs as shown in FIG. 10(b), the contact area between the recording medium S and the movable tray 13b becomes narrower in the width direction compared to when no curl occurs. That is, the recording medium S is in an unstable state against the load in the width direction on the movable tray 13b. In this state, when the movable tray 13b moves in the width direction (x direction), the recording medium S on the movable tray 13b moves in the width direction. For this reason, there is a risk that the recording medium S to be discharged cannot be properly sorted by the movable tray 13b.

[0090] In addition, in the case of a cross grain paper in which the grain direction of the recording medium is perpendicular to the conveying direction, both ends in the width direction curl, and there is a risk that both ends in the width direction of the recording medium may come into contact with a member fixedly arranged near the discharge opening 95, such as a spur base 94 (see FIG. 18) in the discharge tray 13. If the movable tray 13b moves in a state in which both ends that have risen due to curling come into contact with a fixedly arranged member, the recording medium S rotates around the position where it comes into contact with the member as a base point. This reduces the alignment and stackability of the recording medium S to be discharged, and makes it impossible to properly sort the recording medium S. The spur base 94 protrudes downstream in the discharge direction from the standing surface 13bb above the standing surface 13bb of the movable tray 13b.

[0091] Fig. 19(a) is a diagram showing the vicinity of the discharge outlet 95 when the amount of recording media S loaded on the discharge tray 13 is less than a predetermined amount, and Fig. 19(b) is a diagram showing the vicinity of the discharge outlet 95 when the amount of loading is equal to or greater than the predetermined amount. Fig. 19(c) is a table showing correction values ​​set according to combinations of the loading amount and the presence or absence of a sorting process (sorting process).

[0092] When the sorting information indicates that no sorting process is performed, it is only necessary to ensure the opening at the time of discharge, that is, the discharge path of the recording medium from the discharge port 95, without considering the curled recording medium S getting caught on the spur base 94 due to the movement in the width direction of the movable tray 13b. In other words, it is only necessary to ensure that the recording medium S to be discharged does not hit the rear end (upstream end in the discharge direction) of the curled part of the stacked recording medium S. Therefore, in the vertical direction (z direction), the curled recording medium S is arranged to be within the distance L1 from the rear end (upstream end in the discharge direction) of the stacked recording medium to the discharge port 95. In other words, the rear end of the curled recording medium S is arranged to be located below the discharge port 95 when it is stacked on the recording medium S in the discharge tray 13.

[0093] On the other hand, when the sorting information indicates that a sorting process is performed, in order to properly sort the stacked recording media S, it is necessary to take into consideration the recording media S getting caught on the spur base 94. For this reason, the curled recording media S is arranged to be contained within the distance L2 from the rear end of the stacked recording media S to the spur base 94 in the vertical direction (z direction). In other words, the rear end of the curled recording media S is arranged to be located below the spur base 94 when it is stacked on the recording media S in the discharge tray 13.

[0094] Distance L2 is shorter than distance L1. Therefore, when sorting is performed, the allowable curl amount is smaller than when sorting is not performed, and the amount of curl that must be suppressed by the curl suppression process is larger. Therefore, when sorting is performed, the correction value is set to be larger than when sorting is not performed.

[0095] In addition, the distances L1 and L2 from the recording media S loaded on the discharge tray 13 to the discharge opening 95 and the spur base 94 are shorter when the amount of recording media S loaded on the discharge tray 13 is equal to or greater than a predetermined amount (see FIG. 19(b)) than when it is less than a predetermined amount (see FIG. 19(a)). Therefore, when the amount of recording media S loaded on the discharge tray 13 is equal to or greater than a predetermined amount, the allowable amount of curl is smaller than when it is less than the predetermined amount, and the amount of curl that must be suppressed by the curl suppression process is larger. Therefore, when the amount of recording media S loaded on the discharge tray 13 is equal to or greater than a predetermined amount, the correction value is larger than when it is less than the predetermined amount. In this embodiment, the predetermined amount is a loading amount of 14 mm. The predetermined amount is not limited to a loading amount of 14 mm, and can be changed depending on the device configuration, etc.

[0096] Based on this viewpoint, a table (see FIG. 19(c)) in which correction values ​​are set according to combinations of the load amount and whether or not sorting is performed is created and stored in the ROM 203. The correction values ​​based on the load amount and whether or not sorting is performed are obtained from the stored table based on the information on the load amount obtained by the load amount detection unit 214 and the setting information on whether or not sorting is performed.

[0097] In addition, the correction value set in the table of FIG. 19(c) is larger when the load amount is equal to or greater than a predetermined amount than when it is less than the predetermined amount. Also, when sorting is performed, the value is larger than when sorting is not performed. The correction value is set in two stages for the load amount, above a predetermined amount as a threshold and below it, but this is not limited to this, and the correction value may be set in three or more stages. In this case, by appropriately increasing the number of sensors and flags, it becomes possible to detect the load amount detectable by the load amount detection unit 214 in three or more stages.

[0098] In this embodiment, the monitor value obtained in step S1702 in Fig. 13 is obtained by adding together a correction value based on the ink hit amount, a correction value based on the type of recording medium S, a correction value based on the temperature and humidity environment, and a correction value based on the load amount and sorting information. For example, when the ink hit amount in the predetermined area S0 is 260, the type of recording medium S is plain paper, the temperature is 30°C, the humidity is 60%, the load amount is 5 mm, and sorting processing is performed, each correction value is as follows. The correction value based on the ink hit amount is "260", the correction value based on the type of recording medium S is "30", the correction value based on the temperature and humidity environment is "-80", and the correction value based on the load amount and sorting information is "20". Therefore, the monitor value is 260+30+(-80)+20=230.

[0099] As described above, by determining the curl suppression processing based on a plurality of conditions, it is possible to perform the processing more appropriately. [Explanation of symbols]

[0100] 1 Recording device 8. Recording Head 13 Output tray 13b Movable Tray 202 Print Controller

Claims

1. A recording means for applying ink to paper to perform recording; A conveying means for conveying the paper in a conveying direction; a stacking section on which paper recorded by the recording means and discharged by the conveying means are stacked; a sorting unit that operates to sort the loaded paper; an application amount information acquisition means for acquiring information regarding the amount of ink applied to the paper by the recording means; a determination unit that determines whether or not to execute a curl suppression process that suppresses curling after recording by the recording unit in accordance with the amount of ink applied to a predetermined area of ​​the paper based on the information acquired by the application amount information acquisition unit; a direction information acquisition means for determining information indicating a grain direction of the paper relative to a transport direction in which the transport means transports the paper based on the type of paper, the size of the paper, and the paper feed direction; a setting means for setting a predetermined area according to a grain direction of the paper with respect to the transport direction indicated by the information acquired by the direction information acquisition means; having When sorting is performed by the sorting unit, the direction of the sorted paper loaded on the stacking unit is the same when the grain of the paper is parallel to the transport direction and when the grain of the paper is perpendicular to the transport direction; the setting means sets the predetermined area at a corner of the paper, and when the grain direction of the paper is parallel to the transport direction, sets the length of the predetermined area in the transport direction to be longer than the length in a direction perpendicular to the transport direction; a setting means for setting the specified area in a corner of the paper, and when the grain direction of the paper is a direction intersecting the transport direction, making the length of the specified area in the transport direction shorter than the length in a direction perpendicular to the transport direction.

2. When the grain direction of the paper is parallel to the transport direction, the predetermined area is divided in a direction perpendicular to the transport direction, and a coefficient is set for each divided area so that the coefficient value increases from the center of the paper toward the edge in the perpendicular direction; A recording device as described in claim 1, characterized in that when the grain direction of the paper is a direction that intersects the transport direction, the specified area is divided in the transport direction, and a coefficient is set for each divided area so that the value increases from the center of the paper to the end in the transport direction.

3. 3. The recording apparatus according to claim 2, wherein the amount of ink applied in the predetermined region is a sum of values ​​obtained by multiplying the amount of ink applied in each region by the coefficient.

4. 4. The recording apparatus according to claim 1, wherein the setting unit sets the predetermined area at each of the four corners of the paper.

5. 5. The recording apparatus according to claim 1, wherein the determining unit determines the suppression processing that differs in a residence time of the recording medium in a transport path along which the recording medium is transported.

6. The recording device according to claim 5, characterized in that the suppression processing is a processing of reducing the transport speed of the recording medium in the transport path, and a processing of reducing the transport speed in the transport path and stopping the recording medium after recording in the transport path for a certain period of time.

7. A temperature detection means for detecting a temperature; Humidity detection means for detecting humidity; and 7. The recording apparatus according to claim 1, wherein the conditions for determining the suppression process in the determining means include a result of detection by the temperature detecting means and a result of detection by the humidity detecting means.

8. The sorting unit is a movable part of the loading unit, A recording device according to any one of claims 1 to 7, characterized in that the conditions for determining the suppression processing in the determination means include whether or not to move the movable part to perform a sorting process on the paper loaded in the stacking section.

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