JP7003982B2 - Recording device - Google Patents

Description

The present invention relates to a recording device that records by ejecting a liquid onto a recording medium.

In Patent Document 1, in order to prevent the ink (liquid) from adhering to the ejection unit (reception unit) or the paper (recording medium) arranged in the ejection unit, the paper on which the ink is ejected is downstream from the head and It is shown that the ink is discharged to the discharge unit after being made to stand by (stop) in a guide (downstream route) provided upstream of the discharge unit to be dried (see paragraphs 0038, 0042 and FIG. 1).

Japanese Unexamined Patent Publication No. 2014-080011

When recording continuously on a plurality of recording media, if the individual recording media are sequentially stopped and dried in the downstream path as in Patent Document 1, the throughput may decrease.

An object of the present invention is to suppress a decrease in throughput even when it is necessary to stop a recording medium on which a liquid is discharged and dry it in a transport path when continuously recording on a plurality of recording media. It is to provide a recording device that can be used.

In the recording device according to the present invention, a liquid discharge unit having a plurality of discharge ports for discharging a liquid, a storage unit for accommodating a recording medium supplied to the liquid discharge unit, and the liquid discharge unit allow the liquid to be discharged. A receiving unit that receives the discharged recording medium, a transport unit that transports the recording medium along a transport path from the accommodating section to the receiving section via facing positions facing the plurality of ejection ports, and the transport section. It includes a transport unit and a control unit that controls the liquid discharge unit, and the transport route includes an upstream route from the accommodating portion to the facing position, a downstream route from the facing position to the receiving portion, and the downstream route. The control unit includes a recording medium to which a liquid is discharged when continuously recording to a plurality of recording media, including a switchback path that branches from the upstream path or returns to the downstream path. When it is determined in the first judgment process of determining whether or not it is necessary to stop at the transport path and drying, and the first determination process determines that the recording medium needs to be dried, the recording medium is used in the transport path. The recording of 1 in which the transport control process for controlling the transport unit so as to be stopped at is executed, and in the transport control process, the liquid is transported from the upstream route to the downstream route and recorded at the opposite position. The medium is conveyed to the switchback path by reversing the conveying direction, which is the direction in which the recording medium is conveyed by the conveying section, and is stopped while at least a part of the recording medium is in the switchback path. The recording medium of 1 is at least partially switched back to another recording medium which is different from the recording medium and is conveyed from the upstream path to the downstream path and recorded at the opposite position. It is characterized in that when the vehicle is stopped in the state of being in the route, at least a part of the vehicle is stopped in the state of being in the downstream route.

According to the present invention, when recording continuously on a plurality of recording media, even when it is necessary to stop the recording medium from which the liquid is discharged at the transport path and dry it, the individual recording media can be used. By stopping a plurality of recording media (the above-mentioned 1 recording medium and the above-mentioned another recording medium) at the same time in the switchback path and the downstream path, respectively, instead of stopping them in order at the same place, the total recording is performed. The drying stop time is shortened, and the decrease in throughput can be suppressed.

In the transfer control process, the control unit moves the recording medium of 1 which has been stopped in a state where at least a part thereof is in the switchback path to the upstream path or the downstream path without reversing the transfer direction. The second determination process for determining whether or not the movement in the return direction has started is executed, and the other recording medium is used until it is determined in the second determination process that the recording medium 1 has started the movement. When it is determined in the second determination process that the recording medium of 1 has started the movement, at least a part of the recording medium has been stopped in the downstream route. Another recording medium may be transported to the switchback path by reversing the transport direction. According to the above configuration, it is possible to prevent collisions between recording media. Further, when one recording medium starts to move, the throughput is reduced by transporting another recording medium to the switchback path and drying it in the switchback path without waiting until the other recording medium dries. Can be further suppressed.

In the transfer control process, the control unit executes a stop time derivation process for deriving the stop time required for drying for each recording medium, and the stop time of the recording medium 1 in the transfer path is the stop time. After stopping in a state where at least a part of the stop time is equal to or longer than the stop time derived in the derivation process, the transport direction is not reversed again and the direction returns to the upstream path or the downstream path. May start moving. According to the above configuration, by drying the recording medium and then returning it to the upstream path or the downstream path, it is possible to prevent the liquid from adhering to the constituent members of the upstream path or the downstream path.

The switchback path branches off from the downstream path and returns to the upstream path, and the control unit is connected to a plurality of recording media having both sides of a first surface and a second surface opposite to the first surface, respectively. On the other hand, in the transport control process when recording on both sides is continuously performed, the recording medium 1 in which recording is performed on the first surface is stopped in a state where at least a part of the recording medium is in the switchback path. After the transfer, the transfer direction is returned to the upstream path without being reversed again, recording is performed on the second surface at the opposite position, and then the transfer direction is transferred from the downstream path to the receiving portion, and the transfer is performed. When the other recording medium on which recording is performed on the first surface is stopped with at least a part of the recording medium on which recording is performed on the first surface in the switchback path. , At least a part of the downstream path may be stopped. According to the above configuration, by using the route originally provided as the route for double-sided recording as the switchback route, it becomes unnecessary to add the route, and it is possible to avoid complication of the apparatus configuration. Further, by stopping the recording medium on which recording was performed on the first surface by the switchback path and then transporting the recording medium to the upstream path to record on the second surface, the recording medium is stopped from drying and then faces again. The time to reach the position can be shortened, and recording on the second surface of the recording medium can be performed quickly.

The switchback path branches from the downstream path and returns to the upstream path, and the control unit is connected to a plurality of recording media having both sides of a first surface and a second surface opposite to the first surface, respectively. On the other hand, in the transport control process when recording on both sides is continuously performed, the other recording medium in which the recording is performed on the first surface is reversed in the transport direction and the switch is transmitted from the downstream path. It is transported to the back path, returned from the switchback path to the upstream path without reversing the transport direction, transported from the upstream path to the downstream path, and recorded on the second surface at the opposite position. After that, at least a part of the recording medium is stopped in the downstream path, and the recording is performed on the first surface of the first recording medium, and the recording is performed next to the other recording medium. When the recording medium of 1 is transported from the downstream path to the switchback path by reversing the transport direction, and the other recording medium is stopped with at least a part thereof in the downstream path. It may be stopped while at least a part of it is in the switchback path. According to the above configuration, by using the route originally provided as the route for double-sided recording as the switchback route, it becomes unnecessary to add the route, and it is possible to avoid complication of the apparatus configuration. Further, the other recording medium after double-sided recording is stopped in the downstream path to dry both sides, and the recording medium 1 after single-sided recording is stopped in the switchback path to dry one side (first surface). .. That is, by drying a total of three surfaces at two locations at the same time, it is possible to more reliably suppress the decrease in throughput.

The control unit derives a stop time for deriving a stop time required for drying for each recording medium in the transfer control process when continuously recording on both sides of a plurality of recording media having both sides. The process was executed, and the other recording medium was stopped in a state where at least a part of the other recording medium was in the downstream path so that the stop time in the transport path was equal to or longer than the stop time derived in the stop time derivation process. After that, it may be transported to the receiving portion. According to the above configuration, by drying the recording medium and then transporting it to the receiving portion, it is possible to more reliably prevent the liquid from adhering to the receiving portion or the recording medium received by the receiving portion.

When recording continuously on three or more recording media, the control unit has the first surface of the n (n = natural number) recording medium, the first surface of the n + 1th recording medium, and n. The transport unit and the liquid discharge unit are controlled so that recording is performed in the order of the second surface of the second recording medium, the first surface of the n + second recording medium, and the second surface of the n + 1st recording medium. You can do it. Throughput can be improved by recording in the above order.

The control unit performs the transfer control when continuously recording on the first surface of a plurality of recording media having both sides of a first surface and a second surface opposite to the first surface, respectively. In the process, the recording medium on which the recording on the first surface is performed is conveyed from the downstream path to the switchback path by reversing the transport direction, and the switchback path is not reversed again in the transport direction. When the first surface faces the opposite side to the receiving part, the liquid is discharged so that the recording is performed in descending order of the page when the liquid is conveyed to the downstream path again and received by the receiving part. You may control the unit. If recording is performed in the ascending order of the pages in the above case, the order of the pages of the recording medium in the receiving unit becomes the descending order after the recording is completed, and the user needs to rearrange the order of the pages. In this respect, according to the above configuration, the order of the pages of the recording medium in the receiving unit is in ascending order after the recording is completed, and the user does not need to rearrange the order of the pages.

The transport unit includes a transport member that contacts the recording medium in the switchback path to transport the recording medium, and the control unit discharges a predetermined amount or more of the liquid in the recording medium before the transport control process. The extraction process for extracting the region and the determination process for determining the stop position of the recording medium in the switchback path of the recording medium so that the region extracted by the extraction process does not come into contact with the transport member after the extraction process. You may do it. According to the above configuration, it is possible to prevent the liquid adhering to the recording medium from transferring to the transport member (and thus the liquid adhering to the transport member to the recording medium transported along the switchback path).

When the control unit stops the recording medium at the stop position determined by the determination process after the determination process before the transfer control process, is a part of the recording medium applied to the downstream path? When the third determination process for determining whether or not to perform is executed and it is determined in the third determination process that the recording medium does not reach the downstream path, at least a part of the recording medium of the above 1 is said in the transfer control process. When the recording medium of 1 is stopped while being in the switchback path and at least a part of the other recording medium is stopped in the state of being in the switchback path, at least a part of the recording medium is in the downstream path. When it is stopped in a certain state and it is determined in the third determination process that a part of the recording medium is applied to the downstream path, at least a part of the recording medium of 1 is in the switchback path in the transfer control process. The other recording medium may be stopped in a certain state, and the other recording medium may be stopped in a state where at least a part thereof is in the switchback path after the recording medium of 1 is received by the receiving unit. According to the above configuration, an appropriate process can be selected according to the length of the recording medium and the stop position, and the recording medium can be dried.

The transport unit may include a spur roller that contacts the recording medium and transports the recording medium in the downstream path. The spur roller has a small contact area with the recording medium and makes point contact with the recording medium. Therefore, according to the above configuration, when the recording medium after recording is conveyed along the downstream path, the liquid adhering to the recording medium moves to the roller (and by extension, the liquid adhering to the roller moves along the downstream path. It is possible to prevent the transfer to the recorded recording medium to be conveyed).

According to the present invention, when recording continuously on a plurality of recording media, even when it is necessary to stop the recording medium from which the liquid is discharged at the transport path and dry it, the individual recording media can be used. By stopping a plurality of recording media (the above-mentioned 1 recording medium and the above-mentioned another recording medium) at the same time in the switchback path and the downstream path, respectively, instead of stopping them in order at the same place, the total recording is performed. The drying stop time is shortened, and the decrease in throughput can be suppressed.

It is a schematic side view which shows the inside of the inkjet printer which concerns on one Embodiment of this invention. It is a partial cross-sectional view of the inkjet head included in the inkjet printer of FIG. It is a block diagram which shows the electric structure of the inkjet printer of FIG. It is a flow chart which shows the control content which the control part of the inkjet printer of FIG. 1 executes. It is a flow chart which shows "conveyance control <simultaneous drying stop of 2 sheets>" S7 of FIG. It is a schematic side view which shows the state in which the nth sheet is stopped in the switchback path, and the n + 1th sheet is stopped in the downstream path in "conveyance control <simultaneous drying stop of 2 sheets>" S7. It is a schematic side view which shows the state which the nth sheet is stopped in the switchback path in "convey control <stop drying one by one>" S8. In "Transfer control <Simultaneous drying stop of 2 sheets>" S7, after the state shown in FIG. 6, the nth sheet of paper stopped in the switchback path is returned to the upstream path and directed toward the receiving portion via the downstream path. It is a schematic side view which shows the state which the n + 1th sheets of paper which were conveyed and stopped in the downstream path are conveyed to the switchback path, and are stopped in the switchback path.

As shown in FIG. 1, the inkjet printer (hereinafter, simply referred to as “printer”) 1 according to the embodiment of the present invention has a housing 1a. The internal space of the housing 1a houses an inkjet head (hereinafter, simply referred to as “head”) 10, a platen 20, a paper feed tray 30, a transport unit 40, a paper sensor 50, and a control unit 1c. A receiving portion 60 is provided on the upper portion of the top plate of the housing 1a.

The head 10 corresponds to the "liquid discharge unit" of the present invention. The head 10 of the present embodiment is a line head elongated in the main scanning direction, and includes a flow path unit 12 and an actuator unit 17 as shown in FIG.

The flow path unit 12 is a laminated body in which plates 12a to 12d are laminated. A flow path is formed inside the flow path unit 12. The lower surface of the flow path unit 12 is a discharge surface 10x in which a plurality of discharge ports 14a are opened. The flow path formed inside the flow path unit 12 includes one manifold flow path 13 and a plurality of individual flow paths 14. The individual flow path 14 is provided for each discharge port 14a, and extends from the outlet of the manifold flow path 13 to the discharge port 14a via the pressure chamber 16. The manifold flow path 13 communicates with a tank (not shown) for storing ink. The ink supplied from the tank to the manifold flow path 13 passes through the individual flow paths 14 and is discharged from the discharge port 14a.

The actuator unit 17 is a laminated body in which a diaphragm 17a, a piezoelectric layer 17b, and a plurality of individual electrodes 17c are laminated. The diaphragm 17a is fixed to the upper surface of the flow path unit 12 and closes a plurality of pressure chambers 16. The piezoelectric layer 17b is fixed to the upper surface of the diaphragm 17a and faces the plurality of pressure chambers 16. The plurality of individual electrodes 17c are fixed to the upper surface of the piezoelectric layer 17b and face each of the plurality of pressure chambers 16. The portion of the actuator unit 17 sandwiched between each individual electrode 17c and each pressure chamber 16 functions as an individual unimorph type actuator for each pressure chamber 16, and independently responds to the application of voltage to the individual electrodes 17c. It is deformable. By deforming the actuator so as to be convex toward the pressure chamber 16, the volume of the pressure chamber 16 is reduced, pressure is applied to the ink in the pressure chamber 16, and the ink is ejected from the ejection port 14a.

The platen 20 is made of a flat plate and is arranged at a position facing the discharge surface 10x. A predetermined gap suitable for recording is formed between the surface 20x of the platen 20 and the discharge surface 10x.

The paper feed tray 30 corresponds to the “accommodation unit” of the present invention, and accommodates the paper P to be fed to the head 10. Paper P corresponds to the "recording medium" of the present invention. The paper feed tray 30 can accommodate a plurality of sheets P and can accommodate a plurality of different sizes of sheets P, and is removable from the housing 1a.

The transport unit 40 is configured to transport the paper P from the paper feed tray 30 along the transport path R from the paper feed tray 30 to the receiving unit 60 via the facing position X facing the discharge surface 10x. The transport path R is an upstream path R1 from the paper feed tray 30 to the facing position X, a downstream path R2 from the facing position X to the receiving unit 60, and a switchback path R3 branching from the downstream path R2 and returning to the upstream path R1. And include.

The switchback path R3 branches from the downstream path R2 at the branch position A defined in the downstream path R2, and merges with the upstream path R1 at the merging position B defined in the upstream path R1. The switchback path R3 is a path that passes below the head 10 and the platen 20 with the branch position A as one end and the confluence position B as the other end. At the branch position A, a switching mechanism (not shown) for switching the transport destination of the paper P to any of the paths R2 and R3 is arranged. At the merging position B, a switching mechanism (not shown) for switching the transport destination of the paper P to any of the paths R1 and R3 is arranged. Each switching mechanism is controlled by the control unit 1c so that the paper P is conveyed along the determined path.

The transport unit 40 includes a paper feed roller 41, roller pairs 42 to 46, and a plurality of guides 49.

The paper feed roller 41 is arranged at a position in the paper feed tray 30 where it comes into contact with the uppermost paper P. The paper feed roller 41 rotates by driving the transport motor 40M (see FIG. 3) under the control of the control unit 1c, and feeds out the uppermost paper P in the paper feed tray 30.

The roller pairs 42 to 46 are arranged at predetermined intervals along the transport path R. Each of the roller pairs 42 to 46 includes two rollers in contact with each other, and is configured to convey the paper P while being sandwiched between the two rollers. One of the two rollers constituting each roller pair 42 to 46 is a drive roller, and is rotated by driving the transfer motor 40M (see FIG. 3) under the control of the control unit 1c. The other of the two rollers constituting each roller pair 42 to 46 is a driven roller, and as the drive roller rotates, it rotates in the opposite direction to the drive roller while contacting the drive roller. Due to the rotation of the roller pairs 42 to 46, the paper P fed from the paper feed tray 30 by the paper feed roller 41 is conveyed along the transfer path R.

The roller pairs 42, 43, 46 are in the positive direction (in the roller pairs 42, 43, the paper P is conveyed in the direction D1 indicated by the black arrow in FIG. 1, and in the roller pair 46, the paper P is outlined in FIG. It can rotate only in the direction (direction to be conveyed in the direction D2 indicated by the arrow). The roller pairs 44 and 45 can rotate in the forward and reverse directions (the direction in which the paper P is conveyed in the direction D1 and the direction in which the paper P is conveyed in the direction D2).

In each of the roller pairs 43 to 45 arranged on the downstream path R2, one roller (roller that comes into contact with the surface of the paper P to which ink is ejected at the facing position X at the time of the latest recording) 43a to 45a has a plurality of protrusions on the outer periphery. The other rollers 43b to 45b are rubber rollers.

The roller pair 46 corresponds to the “conveying member” of the present invention, and contacts the paper P in the switchback path R3 to transport the paper P.

Each guide 49 includes a pair of plates that are opposed to each other with a gap so as to form a space in which the paper P is conveyed along the transfer path R.

The paper sensor 50 outputs an ON signal when the paper P is at the detection position 50a defined in the upstream path R1 and an OFF signal when there is no paper P at the detection position 50a to the control unit 1c.

In the present embodiment, the receiving unit 60 is composed of the top plate of the housing 1a, and receives the paper P transported along the transport path R.

The control unit 1c includes a CPU (Central Processing Unit) 1c1, a ROM (Read Only Memory) 1c2, a RAM (Random Access Memory) 1c3, an ASIC (Application Specific Integrated Circuit) 1c4, and an I / F (Interface) 1c5, which are arithmetic processing units. And I / O (Input / Output Port) 1c6. The ROM 1c2 stores fixed data such as a program executed by the CPU 1c1. The RAM 1c3 temporarily stores data (image data, etc.) necessary for the CPU 1c1 to execute a program. The ASIC1c4 rewrites, rearranges, and the like (for example, signal processing and image processing) of image data. The I / F 1c5 transmits / receives data to / from an external device (for example, a PC connected to the printer 1). The I / O 1c6 transmits and receives signals to and from various sensors including the paper sensor 50.

Next, with reference to FIGS. 4 to 8, the control contents executed by the control unit 1c (specifically, the CPU 1c1) will be described.

In the following description, the "recording command" means a command instructing a plurality of sheets P to continuously record. The following description relates to the transport control of the paper P in the case of continuously recording on a plurality of papers P, the drive control of the head 10, and the paper in the case of recording on one sheet of paper P. The description of the transport control of P will be omitted. Further, the switching mechanism (not shown) arranged at the branch position A and the merging position B is controlled according to the transport of the paper P, but the control of the switching mechanism will be omitted.

First, as shown in FIG. 4, the CPU 1c1 determines whether or not a recording command has been received from an external device (S1). When it is determined that the recording command has not been received (S1: NO), the CPU 1c1 repeats the process of S1.

When it is determined that the recording command has been received (S1: YES), the CPU 1c1 prints each sheet P to be recorded based on the recording command after recording (that is, after the ink is ejected at the facing position X). ) And it is determined whether or not it is necessary to stop and dry the ink in the transport path R before accepting the ink in the receiving unit 60 (S2). The determination of S2 is made based on, for example, the amount of ink ejected on each paper P, the type of paper P, and the like.

When it is determined that it is not necessary to dry (S2: NO), the CPU 1c1 executes "transport control <no drying stop>" (S3). In S3, the CPU 1c1 controls the transport unit 40 so that each paper P is not stopped in the transport path R due to drying between the paper feed tray 30 and the receiving section 60.

In S3, in the case of single-sided continuous recording (that is, continuous recording on the first side for a plurality of papers P having both sides of the first side and the second side opposite to the first side, respectively), a plurality of papers. P is sequentially conveyed from the paper feed tray 30 along the direction D1, reaches the opposite position X through the upstream path R1, is recorded on the first surface at the opposite position X, and then follows the downstream path R2. It is received by the receiving unit 60 through it.

In S3, in the case of double-sided continuous recording (that is, continuous recording on both sides of a plurality of papers P having both sides of the first side and the second side opposite to the first side, respectively), the plurality of papers P are , Sequentially, are conveyed from the paper feed tray 30 along the direction D1, reach the opposite position X through the upstream path R1, are recorded on the first surface at the opposite position X, and then are conveyed to the downstream path R2. , It is temporarily stopped while being sandwiched between the rollers 44 and 45. Then, the paper P reverses the transport direction (the direction in which the paper P is conveyed by the transport unit 40) by rotating the rollers 44, 45 in the opposite directions, and is conveyed from the downstream path R2 to the switchback path R3 along the direction D2. Will be done. Further, the paper P is returned from the switchback path R3 along the direction D2 to the upstream path R1 through the confluence position B without reversing the transport direction. Then, the paper P is conveyed again along the direction D1, recorded on the second surface at the facing position X, and then received by the receiving unit 60 through the downstream path R2.

When it is determined that it is necessary to dry (S2: YES), the CPU 1c1 extracts regions Px1 and Px2 (see FIGS. 6 and 7) in which a predetermined amount or more of ink is ejected on each paper P (S4). .. In the present embodiment, based on the image data included in the recording command, the amount of ink ejected to each of the plurality of regions Px obtained by dividing the first surface of each paper P into a matrix is calculated, and the amount thereof is calculated. Extracts regions Px1 and Px2 in which is equal to or greater than a predetermined amount.

After S4, the CPU 1c1 determines the stop position of each paper P in the switchback path R3 so that the regions Px1 and Px2 extracted in S4 do not come into contact with the roller pair 46 (S5). Specifically, as shown in FIGS. 6 and 7, when the end of the direction D1 on the paper P is the front end Pa and the end of the direction D2 on the paper P is the rear end Pb, it is closest to the rear end Pb. The stop position is determined so that the paper P is stopped before the region Px1 reaches the roller pair 46.

After S5, the CPU 1c1 determines whether or not a part of the paper P is applied to the downstream path R2 when each paper P is stopped at the stop position determined in S5 (S6). For example, in the case of FIG. 6, it is determined that the paper P does not cover the downstream path R2 (S6: NO), and in the case of FIG. 7, it is determined that a part of the paper P covers the downstream path R2 (S6: YES).

When it is determined that all the sheets P do not reach the downstream path R2 (S6: NO), the CPU 1c1 executes "conveyance control <simultaneous drying stop of two sheets>" (S7). In S7, the CPU 1c1 uses the transport unit 40 so that the two paper Ps are simultaneously stopped in the transport path R for drying while each paper P reaches the paper feed tray 30 to the receiving section 60. Control. Specifically, as shown in FIG. 6, the CPU 1c1 stops the n (n = natural number) th sheet P _n in a state where at least a part of the n (n = natural number) sheet is in the switchback path R3, and the n + 1th sheet. Paper P _{n + 1} is stopped while at least a part of the paper P _n is in the switchback path R3 and at least a part of the paper P n is in the downstream path R2.

When it is determined that at least one sheet of paper P is applied to the downstream path R2 (S6: YES), the CPU 1c1 executes "conveyance control <stop drying one sheet at a time>" (S8). In S8, the CPU 1c1 controls the transport unit 40 so that the paper P is stopped one by one in the transport path R for drying while each paper P reaches the paper feed tray 30 to the receiving section 60. do. Specifically, as shown in FIG. 7, the CPU 1c1 stops the paper P _n in a state where at least a part of the paper P n is in the switchback path R3, and the paper P _{n + 1} receives the paper P _n + 1. After being accepted by 60, it is stopped while at least partly in the switchback path R3.

In S7 and S8, in both single-sided continuous recording and double-sided continuous recording, a plurality of sheets P are sequentially conveyed from the paper feed tray 30 along the direction D1 and passed through the upstream path R1 to the opposite position X. After recording on the first surface at the facing position X, the paper is conveyed to the downstream path R2 and temporarily stopped while being sandwiched between the rollers 44 and 45. Then, the paper P reverses the transport direction by rotating the rollers 44 and 45 in the opposite directions, and is fed from the downstream path R2 to the switchback path R3 along the direction D2. The paper P is stopped in a state where at least a part of the paper P is in the switchback path R3 (see the paper P _n in FIGS. 6 and 7), and after the paper P is dried, the paper P is not reversed in the transport direction and is along the direction D2. It is returned from the switchback path R3 to the upstream path R1 through the confluence position B. Then, the paper P is conveyed again along the direction D1 and via the facing position X (at this time, recording is not performed in the case of single-sided continuous recording, and recording is performed on the second side in the case of double-sided continuous recording. We), it is received by the receiving unit 60 through the downstream route R2.

Therefore, in S7 and S8, when double-sided continuous recording is performed on three or more sheets P, the first surface of the sheet P _n , the first surface of the sheet P _{n + 1} , the second surface of the sheet P _n , and the sheet P Recording is performed in the order of the first side of _{n + 2} and the second side of paper P _{n + 1} (that is, the second page, the fourth page, the first page, the sixth page, and the third page).

Further, in S7 and S8, in the case of single-sided continuous recording, the paper P recorded on the first side is conveyed from the downstream path R2 to the switchback path R3 by reversing the conveying direction, and the conveying direction is inverted. When it is conveyed from the switchback path R3 to the downstream path R2 again and received by the receiving unit 60, the first surface faces the side opposite to the receiving unit 60. Therefore, the CPU 1c1 controls the head 10 so that recording is performed in descending order of pages.

In S7 and S8, at least a part of the paper P _{n + 1} passing through the branch position A along the direction D1 after recording on the first surface and before reversing the transport direction is the switchback path R3. After the paper P n that had been stopped in the state of the paper P _n started moving in the direction of returning to the upstream path R1 (direction D2) without reversing the transport direction, and the tip Pa of the paper P _n passed through the branch position A. Is. Further, the paper P _n passes through the branch position A along the direction D1 after being returned to the upstream path R1 and before being received by the receiving unit 60 in a state where at least a part of the paper P n passes through the switchback path R3. After the stopped paper P _{n + 1} starts moving in the direction of returning to the upstream path R1 (direction D2) without reversing the transport direction, and the tip Pa of the paper P _{n + 1} passes through the branch position A. Is.

The CPU 1c1 executes S3, S7 or S8, and ends the routine after the recording for all the papers P is completed and all the papers P are received by the receiving unit 60.

Next, with reference to FIGS. 5, 6 and 8, "conveyance control <stop drying two sheets at the same time>" S7 will be specifically described.

First, as shown in FIG. 5, the CPU 1c1 derives the stop time required for drying for each paper P (S11). In S11, for example, the stop time is derived based on the amount of ink ejected on each paper P, the type of paper P, and the like.

After S11, the CPU 1c1 sets "n = 1" (S12).

After S12, the CPU 1c1 conveys the paper P _n from the paper feed tray 30 to the upstream path R1 and the downstream path R2 along the direction D1, reverses the conveying direction, and conveys the paper P n to the switchback path R3, and switches back. It is stopped at the path R3, and the paper P _{n + 1} is conveyed from the paper feed tray 30 to the upstream path R1 and the downstream path R2 along the direction D1 and stopped at the downstream path R2 (S13: see FIG. 6). Here, the period in which the paper P _n is stopped in the switchback path R3 and the period in which the paper P _{n + 1} is stopped in the downstream path R2 overlap in time.

After S13, the CPU 1c1 returns to the upstream path R1 without reversing the transport direction, for example, based on the driving condition of the transport motor 40M, the paper P _n that has been stopped while at least a part of the paper P n is in the switchback path R3. It is determined whether or not the movement in the direction (direction D2) has started (S14). In the present embodiment, the CPU 1c1 starts the movement of the paper P _n after the paper P _n is dried (that is, when the stop time in the transport path R becomes equal to or longer than the stop time derived in S11). ..

When it is determined that the paper P _n has not started the movement (S14: NO), the CPU 1c1 repeats the process of S14. During this time, the stoppage of the paper P _{n + 1} in the downstream path R2 is maintained.

When it is determined that the paper P _n has started the above movement (S14: YES), the CPU 1c1 reverses the transport direction of the paper P _{n + 1} , which has been stopped while at least a part of the paper P n is in the downstream path R2. It is conveyed to the switchback path R3 and stopped in a state where at least a part of the switchback path R3 is present (S15: see FIG. 8). After the paper P _n that has started the movement is returned from the switchback path R3 to the upstream path R1, it is conveyed again along the direction D1 and via the opposite position X (at this time, in the case of one-sided continuous recording). Recording is not performed, and in the case of double-sided continuous recording, recording is performed on the second surface), and the paper is received by the receiving unit 60 through the downstream route R2.

After S15, the CPU 1c1 refers to the image data included in the recording command and determines whether or not there is recording data on the paper P _{n + 2} (S16).

When it is determined that there is recorded data of the paper P _{n + 2} (S16: YES), the CPU 1c1 conveys the paper P _{n + 2} from the paper feed tray 30 to the upstream path R1 and the downstream path R2 along the direction D1. Then, it is stopped at the downstream route R2 (S17). Here, the period (S15) in which the paper P _{n + 1} is stopped in the switchback path R3 and the period (S17) in which the paper P _{n + 2} is stopped in the downstream path R2 overlap in time. ..

After S17, the CPU 1c1 sets "n = n + 1" (S18). After S18, the CPU 1c1 returns the process to S14.

When it is determined that there is no recording data of the paper P _{n + 2} (S16: NO), the CPU 1c1 uses the paper P _{n + 1} which has been stopped while at least a part of the paper P _n + 2 is in the switchback path R3. After drying ₊₁ (that is, when the stop time in the transport path R is equal to or longer than the stop time derived in S11), the movement is started, returned to the upstream path R1, and then along the direction D1 again. (S19), the receiving unit 60 receives the data via the opposite position X and the downstream path R2.

It should be noted that each sheet P may or may not be stopped in a state where at least a part of the paper P is in the downstream path R2 after being returned to the upstream path R1 and before being received by the receiving unit 60. good.

After S19, the CPU 1c1 ends the routine.

As described above, according to the present embodiment, when the CPU 1c1 continuously records on a plurality of papers P, the paper P on which ink is ejected is stopped at the transport path R and dried. It is determined whether or not it is necessary (S2: first determination process). Then, when it is determined that the paper 1c1 needs to be dried (S2: YES), the CPU 1c1 controls the transport unit 40 so that the paper P is stopped at the transport path R (S7: transport control process). In S7, as shown in FIG. 6, the CPU 1c1 stops the paper P _n in a state where at least a part of the paper P n is in the switchback path R3, and the paper P _{n + 1} has at least a part of the paper P _n . When the switchback path R3 is stopped, at least a part of the switchback path R2 is stopped. That is, even when it is necessary to stop the paper P on which ink is ejected at the transport path R and dry it, instead of stopping the individual papers P in order at the same place, the plurality of papers P are switched. The back path R3 and the downstream path R2 are stopped at the same time. As a result, the total drying stop time during recording can be shortened, and a decrease in throughput can be suppressed.

In S7, as shown in FIG. 5, the CPU 1c1 returns to the upstream path R1 without reversing the transport direction (direction D2), in which the paper P _n that has been stopped with at least a part of the switchback path R3 is in the switchback path R3. It is determined whether or not the movement to is started (S14: second determination process). Then, the CPU 1c1 maintains the stoppage of the paper P _{n + 1} in the downstream path R2 until it is determined that the paper P _n has started the movement (S14: NO), and the paper P _n has started the movement. If it is determined (S14: YES), the paper P _{n + 1} , which has been stopped while at least a part of the paper is in the downstream path R2, is conveyed to the switchback path R3 by reversing the conveying direction (S15: FIG. 8). reference). According to the above configuration, it is possible to prevent the paper P from colliding with each other. Further, when the paper P _n starts to move, the paper P _{n + 1} is conveyed to the switchback path R3 and dried in the switchback path R3 without waiting for the paper P _{n + 1} to dry. It is possible to further suppress the decrease in throughput.

In S7, the CPU 1c1 derives the stop time required for drying for each sheet P as shown in FIG. 5 (S11: stop time derivation process). Then, the CPU 1c1 stops the paper P _n in a state where at least a part of the paper P n is in the switchback path R3 so that the stop time in the transfer path R is equal to or longer than the stop time derived in S11, and then reverses the transfer direction. The movement in the direction of returning to the upstream route R1 (direction D2) is started without causing the movement (see FIGS. 6 and 8). According to the above configuration, by drying the paper P and then returning it to the upstream path R1, it is possible to prevent the ink from adhering to the constituent members of the upstream path R1.

The switchback path R3 branches from the downstream path R2 and returns to the upstream path R1. According to the above configuration, by using the route originally provided as the route for double-sided recording as the switchback route R3, it becomes unnecessary to add the route, and it is possible to avoid complication of the apparatus configuration. Further, in S7 in the case of continuous double-sided recording, the CPU 1c1 stops the paper P _n recorded on the first surface in a state where at least a part of the paper P n is in the switchback path R3, and then reverses the transport direction. Instead, the paper P _{n +} was returned to the upstream path R1 and recorded on the second surface at the opposite position X, then conveyed from the downstream path R2 to the receiving unit 60 and recorded on the first surface. ₁ is stopped while at least a part of the paper P n on which the recording is performed on the first surface is in the switchback path R3, and at least a part of the paper P _n is stopped in the downstream path R2 (FIG. 1). 5. See FIGS. 6 and 8). According to the above configuration, the paper P _n recorded on the first surface is stopped by the switchback path R3, and then transported to the upstream path R1 for recording on the second surface, whereby the paper P _n is recorded. It is possible to shorten the time required to reach the facing position X again after the drying is stopped, and to quickly record the paper P _n on the second surface.

When performing double-sided continuous recording on three or more sheets P, the CPU 1c1 has the first surface of the sheet P _n , the first surface of the sheet P _{n + 1} , the second surface of the sheet P n, and the sheet P _{n + 2.} The transport unit 40 and the head so that the first side of the paper and the second side of the paper P _{n + 1} (that is, the second page, the fourth page, the first page, the sixth page, and the third page) are recorded in this order. 10 is controlled. Throughput can be improved by recording in the above order.

In the present embodiment, in the case of single-sided continuous recording, the paper P recorded on the first side is transported from the downstream path R2 to the switchback path R3 by reversing the transport direction, without reversing the transport direction. When it is conveyed from the switchback path R3 to the downstream path R2 again and received by the receiving section 60, the first surface faces the side opposite to the receiving section 60. The CPU 1c1 controls the head 10 so that recording is performed in descending order of pages in S7 in the case of continuous single-sided recording. When recording is performed in the ascending order of the pages in the above case, the order of the pages of the paper P in the receiving unit 60 becomes the descending order after the recording is completed, and the user needs to rearrange the order of the pages. In this respect, according to the above configuration, the order of the pages of the paper P in the receiving unit 60 is in ascending order after the recording is completed, and the user does not need to rearrange the order of the pages.

As shown in FIG. 4, the CPU 1c1 extracts regions Px1 and Px2 (see FIGS. 6 and 7) in which a predetermined amount or more of ink is ejected on the paper P before S7 (S4: extraction process). Then, after S4, the CPU 1c1 determines the stop position of the paper P in the switchback path R3 so that the regions Px1 and Px2 extracted in S4 do not come into contact with the roller pair 46 (S5). According to the above configuration, it is possible to prevent the ink adhering to the paper P from transferring to the roller pair 46 (and thus the ink adhering to the roller pair 46 to the paper P conveyed along the switchback path R3). Can be done. Further, when the switchback path R3 is a path for double-sided recording as in the present embodiment, the upstream path in the switchback path R3 is compared with the configuration in which the stop position is determined so that the paper P does not come into contact with the roller pair 46. The paper P can be arranged at a position close to R1, and recording on the second surface can be performed quickly.

As shown in FIG. 4, the CPU 1c1 determines whether or not a part of the paper P is applied to the downstream path R2 when the paper P is stopped at the stop position determined in S5 after S5 before S7. Judgment (S6: third judgment process). When it is determined that the paper P does not reach the downstream path R2 (S6: NO), the CPU 1c1 executes S7, stops the paper P _n in a state where at least a part of the paper P is in the switchback path R3, and the paper P _{n + 1} is stopped while at least a part of the paper P _n is stopped in the switchback path R3 and at least a part is stopped in the downstream path R2 (see FIG. 6). When it is determined that the paper P is applied to the downstream path R2 (S6: YES), the CPU 1c1 executes S8, stops the paper P _n in a state where at least a part of the paper P is in the switchback path R3, and the paper After the paper P _n is received by the receiving unit 60, P _{n + 1} is stopped in a state where at least a part of the paper P n is in the switchback path R3 (see FIG. 7). According to the above configuration, an appropriate process can be selected according to the length of the paper P and the stop position, and the paper P can be dried.

The transport unit 40 includes spur rollers (rollers 43a to 45a) that come into contact with the paper P in the downstream path R2 to transport the paper P. The spur roller has a small contact area with the paper P and makes point contact with the paper P. Therefore, according to the above configuration, when the paper P after recording is conveyed along the downstream path R2, the ink adhering to the paper P moves to the rollers 43a to 45a (and by extension, the ink adhering to the rollers 43a to 45a). Is transferred to the paper P conveyed along the downstream path R2).

Subsequently, another embodiment of the present invention will be described.

This embodiment is the same as the above-described embodiment except for the control content of double-sided continuous recording in S7. When performing double-sided continuous recording in S7, it is not essential in the above-described embodiment that at least a part of the paper P recorded on both sides is stopped in the downstream path R2 before being received by the receiving unit 60. However, it is indispensable in this embodiment. Further, in the above-described embodiment, the paper P _n on which the recording is performed on the first surface and the paper P _{n + 1} on which the recording is performed on the first surface are stopped at the switchback path R3 and the downstream path R2, respectively, and dried. On the other hand, in the present embodiment, the paper P _n recorded on both sides and the paper P _{n + 1} recorded on the first side are stopped at the downstream path R2 and the switchback path R3, respectively, and dried. (That is, a total of three sides, that is, the first side and the second side of the paper P _n and the first side of the paper P _{n + 1} are dried at the same time).

More specifically, in the present embodiment, when performing double-sided continuous recording in S7, the CPU 1c1 switches back the paper P _n recorded on the first surface from the downstream path R2 by reversing the transport direction. It is conveyed to the route R3, but is not stopped at the switchback route R3, but is returned from the switchback route R3 to the upstream route R1. Then, the CPU _1c1 stops the paper Pn in a state where at least a part of the paper Pn is in the downstream path R2 after being conveyed from the upstream path R1 to the downstream path R2 and recorded on the second surface at the facing position X. The CPU 1c1 conveys the paper P _n to the receiving unit 60 after the paper P _n is dried (that is, when the stop time in the transport path R becomes equal to or longer than the stop time derived in S11). Further, the CPU 1c1 transports the paper P _{n + 1} recorded on the first surface from the downstream path R2 to the switchback path R3 by reversing the transport direction, and at least a part of the paper P _n is a downstream path. When it is stopped in the state of being in R2, it is stopped in the state that at least a part of it is in the switchback path R3 (see FIG. 8). Here, the period in which the paper P _n is stopped in the downstream path R2 and the period in which the paper P _{n + 1} is stopped in the switchback path R3 overlap in time.

As described above, according to the present embodiment, the paper P _n after double-sided recording is stopped at the downstream path R2 to dry both sides, and the paper P _{n + 1} after single-sided recording is stopped at the switchback path R3. Stop and dry one side (first side). That is, by drying a total of three surfaces at two locations at the same time, it is possible to more reliably suppress the decrease in throughput.

Further, in the present embodiment, the CPU 1c1 stops the paper P n after double-sided recording in a state where at least a part of the paper P _n is in the downstream path R2 so that the stop time in the transport path R is equal to or longer than the stop time derived in S11. After that, it is transported to the receiving unit 60. By drying the paper P in this way and then transporting it to the receiving unit 60, it is possible to more reliably prevent the ink from adhering to the paper P received by the receiving unit 60 or the receiving unit 60.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various design changes can be made as long as it is described in the claims as follows, for example. It is a thing.

-The liquid discharge unit is not limited to the line type and may be a serial type.
-The liquid discharged by the liquid ejection unit is not limited to the ink, and may be any liquid (for example, a pretreatment liquid).
-The number of liquid discharge units included in the recording device may be any number of 1 or more, and may be a plurality.
-The accommodating portion is not limited to being removable from the housing of the recording device, for example, can be pulled out from the housing, or can be opened / closed with respect to the housing (manual feed tray, etc.). May be good.
-The receiving portion is not limited to being composed of the top plate of the housing, and may be composed of, for example, a member that can be attached to and detached from the housing, can be pulled out, or can be opened and closed.
-The transport unit may include a belt in place of or in addition to the rollers and guides.
-The transport member is not limited to the roller pair, but may be a belt or the like.
-The transport route is not limited to the configuration as in the above-described embodiment. For example, the upstream path and the downstream path may have a shape along a horizontal plane. The switchback path may return to the downstream path. In this case, the branching position from the downstream path in the switchback path and the merging position to the downstream path in the switchback path may be the same position.
-The recording medium is not limited to paper, and may be any recordable medium such as cloth.
-The recording device according to the present invention is not limited to a printer, and may be a facsimile or a copier.

1 Inkjet printer (recording device)
1c Control unit 10 Inkjet head (liquid ejection unit)
14a Discharge port 30 Paper tray (accommodation unit)
40 Transport section 43a to 45a Spur roller 46 Roller pair (conveyor member)
60 Receptor P paper (recording medium)
Px1, Px2 region R transport route R1 upstream route R2 downstream route R3 switchback route X facing position

Claims (9)

A liquid discharge unit having multiple discharge ports for discharging liquid,
A storage unit for accommodating a recording medium supplied to the liquid discharge unit, and a storage unit.
A receiving unit that receives the recording medium from which the liquid is discharged by the liquid discharging unit, and a receiving unit.
A transport unit that transports a recording medium along a transport path from the accommodating portion to the receiving portion via facing positions facing the plurality of discharge ports.
A control unit for controlling the transport unit and the liquid discharge unit is provided.
The transport route is an upstream route from the accommodating portion to the facing position, a downstream route from the facing position to the receiving portion, and a branching position defined in the downstream route, branching from the downstream route and upstream. Including the switchback route back to the route
The control unit
When the amount of liquid discharged to the recording medium is a predetermined amount or more, one recording medium conveyed from the upstream path to the downstream path and recorded at the opposite position is transferred from the upstream path. After transporting the recording medium in the transport direction, which is the direction in which the recording medium is transported to the downstream path, and passing through the branch position, the transport direction is reversed and the recording medium is conveyed to the switchback path, and at least of the recording medium of 1. A part of the recording medium was stopped in the state of being in the switchback path, and the recording medium was different from the recording medium of 1 and was conveyed from the upstream path to the downstream path, and recording was performed at the opposite position. When at least a part of the recording medium 1 is stopped in the switchback path, another recording medium is stopped in a state where at least a part of the other recording medium is in the downstream path. Perform stop control and
When the amount of liquid discharged to the recording medium is less than the predetermined amount, the recording medium is conveyed along the transfer path without performing the stop control .
Further, when the control unit continuously records on both sides of a plurality of recording media having both sides of a first surface and a second surface opposite to the first surface, the control unit can be used as a recording medium. When the amount of liquid discharged with respect to the liquid is a predetermined amount or more, at least a part of the recording medium 1 in which recording is performed on the first surface is in the switchback path. After stopping in the state, the transport direction is returned to the upstream path without reversing the transport direction, recording is performed on the second surface at the facing position, and then the transport is carried from the downstream path to the receiving portion. Further, the other recording medium in which recording is performed on the first surface is stopped in a state where at least a part of the recording medium in which recording is performed on the first surface is in the switchback path. When there is, at least a part of the other recording medium is stopped in the downstream path.
Further, when the control unit continuously records on three or more recording media, the first surface of the n (n = natural number) recording medium, the first surface of the n + 1th recording medium, The transport unit and the liquid discharge unit are provided so that recording is performed in the order of the second surface of the nth recording medium, the first surface of the n + second recording medium, and the second surface of the n + 1st recording medium. A recording device characterized by being controlled . A liquid discharge unit having multiple discharge ports for discharging liquid,
A storage unit for accommodating a recording medium supplied to the liquid discharge unit, and a storage unit.
A receiving unit that receives the recording medium from which the liquid is discharged by the liquid discharging unit, and a receiving unit.
A transport unit that transports a recording medium along a transport path from the accommodating portion to the receiving portion via facing positions facing the plurality of discharge ports.
A control unit for controlling the transport unit and the liquid discharge unit is provided.
The transport route is an upstream route from the accommodating portion to the facing position, a downstream route from the facing position to the receiving portion, and a branching position defined in the downstream route, branching from the downstream route and upstream. Including the switchback route back to the route
The control unit
When the amount of liquid discharged to the recording medium is a predetermined amount or more, one recording medium conveyed from the upstream path to the downstream path and recorded at the opposite position is transferred from the upstream path. After transporting the recording medium in the transport direction, which is the direction in which the recording medium is transported to the downstream path, and passing through the branch position, the transport direction is reversed and the recording medium is conveyed to the switchback path, and at least of the recording medium of 1. A part of the recording medium was stopped in the state of being in the switchback path, and the recording medium was different from the recording medium of 1 and was conveyed from the upstream path to the downstream path, and recording was performed at the opposite position. When at least a part of the recording medium 1 is stopped in the switchback path, another recording medium is stopped in a state where at least a part of the other recording medium is in the downstream path. Perform stop control and
When the amount of liquid discharged to the recording medium is less than the predetermined amount, the recording medium is conveyed along the transfer path without performing the stop control.
Further, when the control unit continuously records on both sides of a plurality of recording media having both sides of a first surface and a second surface opposite to the first surface, the control unit can be used as a recording medium. When the amount of liquid discharged to the liquid is a predetermined amount or more, the other recording medium in which recording is performed on the first surface is transferred from the downstream path to the switchback path by reversing the transport direction. After transporting, returning from the switchback path to the upstream path without reversing the transport direction, transporting from the upstream path to the downstream path, and recording to the second surface at the facing position is performed. , The recording medium of 1 in which at least a part of the other recording medium is stopped in a state of being in the downstream path and recording is performed on the first surface, and the recording is performed next to the other recording medium. The recording medium of 1 is transported from the downstream path to the switchback path by reversing the transport direction, and at least a part of the other recording medium is stopped in the downstream path. Occasionally, at least a part of the recording medium of 1 is stopped while being in the switchback path.
Further, when the control unit continuously records on three or more recording media, the first surface of the n (n = natural number) recording medium, the first surface of the n + 1th recording medium, The transport unit and the liquid discharge unit are provided so that recording is performed in the order of the second surface of the nth recording medium, the first surface of the n + second recording medium, and the second surface of the n + 1st recording medium. A recording device characterized by being controlled. A liquid discharge unit having multiple discharge ports for discharging liquid,
A storage unit for accommodating a recording medium supplied to the liquid discharge unit, and a storage unit.
A receiving unit that receives the recording medium from which the liquid is discharged by the liquid discharging unit, and a receiving unit.
A transport unit that transports a recording medium along a transport path from the accommodating portion to the receiving portion via facing positions facing the plurality of discharge ports.
A control unit for controlling the transport unit and the liquid discharge unit is provided.
The transport route is an upstream route from the accommodating portion to the facing position, a downstream route from the facing position to the receiving portion, and a branching position defined in the downstream route, branching from the downstream route and upstream. Including the switchback route back to the route
The control unit
When the amount of liquid discharged to the recording medium is a predetermined amount or more, one recording medium conveyed from the upstream path to the downstream path and recorded at the opposite position is transferred from the upstream path. After transporting the recording medium in the transport direction, which is the direction in which the recording medium is transported to the downstream path, and passing through the branch position, the transport direction is reversed and the recording medium is conveyed to the switchback path, and at least of the recording medium of 1. A part of the recording medium was stopped in the state of being in the switchback path, and the recording medium was different from the recording medium of 1 and was conveyed from the upstream path to the downstream path, and recording was performed at the opposite position. When at least a part of the recording medium 1 is stopped in the switchback path, another recording medium is stopped in a state where at least a part of the other recording medium is in the downstream path. Perform stop control and
When the amount of liquid discharged to the recording medium is less than the predetermined amount, the recording medium is conveyed along the transfer path without performing the stop control.
Further, when the control unit continuously records on the first surface of a plurality of recording media having both sides of the first surface and the second surface opposite to the first surface, respectively, the control unit said. The recording medium on which recording is performed on the first surface is conveyed from the downstream path to the switchback path by reversing the transport direction, and the downstream path is again transferred from the switchback path without reversing the transport direction. The liquid discharge section is controlled so that recording is performed in descending order of pages when the first surface faces the opposite side to the receiving section when the liquid is conveyed to the path and received by the receiving section. A recording device characterized by that. A liquid discharge unit having multiple discharge ports for discharging liquid,
A storage unit for accommodating a recording medium supplied to the liquid discharge unit, and a storage unit.
A receiving unit that receives the recording medium from which the liquid is discharged by the liquid discharging unit, and a receiving unit.
A transport unit that transports a recording medium along a transport path from the accommodating portion to the receiving portion via facing positions facing the plurality of discharge ports.
A control unit for controlling the transport unit and the liquid discharge unit is provided.
The transport route is an upstream route from the accommodating portion to the facing position, a downstream route from the facing position to the receiving portion, and a branching position defined in the downstream route, branching from the downstream route and upstream. Including the switchback route back to the route
The control unit
When the amount of liquid discharged to the recording medium is a predetermined amount or more, one recording medium conveyed from the upstream path to the downstream path and recorded at the opposite position is transferred from the upstream path. After transporting the recording medium in the transport direction, which is the direction in which the recording medium is transported to the downstream path, and passing through the branch position, the transport direction is reversed and the recording medium is conveyed to the switchback path, and at least of the recording medium of 1. A part of the recording medium was stopped in the state of being in the switchback path, and the recording medium was different from the recording medium of 1 and was conveyed from the upstream path to the downstream path, and recording was performed at the opposite position. When at least a part of the recording medium 1 is stopped in the switchback path, another recording medium is stopped in a state where at least a part of the other recording medium is in the downstream path. Perform stop control and
When the amount of liquid discharged to the recording medium is less than the predetermined amount, the recording medium is conveyed along the transfer path without performing the stop control.
The transport unit includes a transport member that contacts the recording medium and transports the recording medium in the switchback path.
Further, when the amount of liquid discharged to the recording medium is equal to or more than a predetermined amount, the control unit may perform before transporting the recording medium.
An area in which a predetermined amount or more of liquid is discharged is extracted from the recording medium.
A recording apparatus characterized in that a stop position of a recording medium in the switchback path is determined so that the extracted region does not come into contact with the transport member. The control unit
When the amount of liquid discharged to the recording medium is more than the specified amount,
Until it is determined that the recording medium 1 that has been stopped at least partially in the switchback path has started moving, the stoppage of the other recording medium in the downstream path is maintained.
When it is determined that the recording medium of 1 has started moving, the other recording medium that has been stopped while at least a part of the recording medium is in the downstream path is reversed in the transport direction to the switchback path. The recording device according to claim 1 to 4 , which is characterized by carrying. The control unit
When the amount of liquid discharged to the recording medium is more than the specified amount,
The stop time derivation process for deriving the stop time required for drying is executed for each recording medium, and the stop time is derived.
The recording medium of 1 is stopped in a state where at least a part of the recording medium is in the switchback path so that the stop time in the transfer path is equal to or longer than the stop time derived in the stop time derivation process, and then the transfer is performed. The recording device according to claim 5 , wherein the movement in the direction of returning to the upstream path is started without reversing the direction. When the control unit continuously records on both sides of a plurality of recording media having both sides, if the amount of liquid discharged to the recording medium is a predetermined amount or more, the control unit may use the control unit.
The stop time derivation process for deriving the stop time required for drying is executed for each recording medium, and the stop time is derived.
After stopping the other recording medium in a state where at least a part of the other recording medium is in the downstream path so that the stop time in the transport path is equal to or longer than the stop time derived in the stop time derivation process, the receiving unit. The recording device according to claim 2 , wherein the recording device is transported to a new device. When the amount of liquid discharged to the recording medium is a predetermined amount or more, the control unit may use the control unit.
When the recording medium is stopped at the stop position after the stop position of the recording medium in the switchback path is determined so that the region where the liquid of a predetermined amount or more is discharged does not come into contact with the transport member in the recording medium. Judging whether or not a part of the recording medium is applied to the downstream route,
When it is determined that the recording medium does not reach the downstream path, the recording medium of 1 is stopped while at least a part of the recording medium of 1 is in the switchback path, and another recording medium is used. When at least a part of the recording medium of 1 is stopped in the state of being in the switchback path, at least a part of the other recording medium is stopped in the state of being in the downstream path.
When it is determined that a part of the recording medium is in the downstream path, the recording medium of 1 is stopped while at least a part of the recording medium of 1 is in the switchback path, and the other recording is performed. The recording according to claim 4 , wherein the medium is stopped in a state where at least a part of the other recording medium is in the switchback path after the recording medium of 1 is received by the receiving unit. Device. The recording device according to any one of claims 1 to 8 , wherein the transport unit includes a spur roller that comes into contact with the recording medium and conveys the recording medium in the downstream route.

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