JP2019116055A - Recording device and recording system - Google Patents

Abstract

To provide a recording device taking into consideration both of efficient drying of an already recorded sheet and suppression of running costs and a recording system comprising the recording device.SOLUTION: A recording unit 2 comprises a line head 10 that performs recording on a sheet by discharging ink, a plurality of downstream-side conveyance paths which are branched at a branching part G1 positioned at a downstream side of the line head, a heat roller pair 11 that contacts the sheet and dries the already recorded sheet by heating, and a control part 27 that controls operation of the heat roller pair. The heat roller pair is provided in a medium conveyance path between the line head and the branching part. The control part controls operation of the heat roller pair according to whether the already recorded sheet by the line head is conveyed to any path of the plurality of downstream-side conveyance paths.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a recording apparatus including a recording unit that discharges a liquid onto a medium to be conveyed to perform recording, and a recording system including the recording apparatus including the recording unit.

  In a recording apparatus provided with a recording unit for discharging (jetting) liquid (ink) onto a medium for recording, represented by an inkjet printer, if drying of the medium after recording is insufficient, the following problems occur. May occur.

  For example, the medium may be curled such that the recording surface is on the outside, and the curled medium is likely to be caught in the transport path, which may cause clogging. In addition, the medium containing the liquid component has low rigidity, is easily caught in the transport path, and may be easily clogged. In addition, there is a possibility that the liquid which has not dried completely adheres to the transport unit such as the roller.

  In order to avoid these problems, a recording apparatus has been proposed in which a heating unit is provided in a conveyance path after recording by the recording unit, and the liquid jetted to the medium is evaporated (for example, a patent) Literature 1). The heating part of patent document 1 is comprised by a pair of roller heated by a heater. According to the heating unit having such a configuration, the medium can be dried in a short time.

JP 2012-210758 A

  Here, since the drying of the medium by the heating unit requires a relatively large amount of power consumption, when the drying by the drying unit is performed, the running cost of the recording apparatus is increased.

By the way, in the recording apparatus, a plurality of different conveyance destinations are provided as conveyance paths after recording by the recording unit (in the case of double-sided recording, after completion of recording on both the first surface and the second surface). May be
For example, a first discharge path, which is a path to a discharge unit provided in the recording apparatus, and another apparatus from the recording apparatus (for example, a post-processing apparatus that performs post-processing such as punching processing and stapling processing) And a second discharge path which is a path to the discharge portion of the other device.

In such a case, the second discharge path includes the first discharge path provided in the recording device itself and the second discharge path discharged after being sent to the post-processing device as the other device. The path may be longer than the first discharge path, and the path may be complicated.
If the medium after recording passes a long and complicated path, the possibility of the occurrence of the failure that occurs when the medium after drying is insufficiently dried is increased.

  On the other hand, like the first discharge path provided in the recording device itself, the path only to be discharged from the device is often simple and short. In such a case, there is little possibility of the occurrence of the above-mentioned problems, and the necessity of drying by the drying unit is low.

  Accordingly, the present invention has been made in view of such a situation, and an object thereof is a recording apparatus in which both efficient drying of a medium after recording and suppression of running cost are taken into consideration, and An object of the present invention is to provide a recording system provided with a recording device.

  A recording apparatus according to a first aspect of the present invention for solving the above-mentioned problems includes a recording unit that discharges a liquid onto a medium to perform recording, and a plurality of branches at a branch unit located downstream of the recording unit. A drying unit for contacting the medium and drying the medium after recording by heating, and a control unit for controlling the operation of the drying unit, wherein the drying unit includes the recording unit. And the control unit is configured to send the medium recorded by the recording unit to any one of the plurality of downstream-side conveyance paths. The operation of the drying unit is controlled in accordance with the heel.

  According to this aspect, the drying unit is provided on the medium transport path between the recording unit and the branch unit, so that the medium after recording by the recording unit is the plurality of downstream transport paths. The medium after recording can be dried by one of the drying units, regardless of which route the sheet is sent to, thereby suppressing the increase in size and the cost of the apparatus.

In addition, since the control unit controls the operation of the drying unit according to which one of the plurality of downstream transport paths the medium after recording by the recording unit is sent, it is useless. Power consumption can be suppressed, and running costs in the recording apparatus can be suppressed.
For example, in the case where the downstream conveyance path to which the medium after recording is sent is a short path with a short path curvature and the like, the medium is the path without drying of the medium after recording. There is little risk of getting caught. Therefore, in such a case, the power consumption in the drying unit is suppressed by shortening the drying time by the drying unit, lowering the heating temperature for drying, or not performing the heating for drying, etc. Thus, the running cost of the recording apparatus can be suppressed.
In the present specification, "suppression of power consumption" includes the case where power is not consumed.

  According to a second aspect of the present invention, in the first aspect, the plurality of downstream transport paths are a first downstream transport path, and a second path length is longer than the first downstream transport path. A downstream transport path, wherein the controller causes the drying unit to be in a first state when the medium after recording is sent to the first downstream transport path, and the medium after recording is The drying unit may be set to a second state in which the drying unit is heated more than the first state when it is sent to the second downstream transport path.

According to this aspect, when the medium after recording is sent to the first downstream transport path, the control unit sets the drying unit in the first state, and the medium after recording is the first state. When the drying unit is fed to the second downstream transport path having a path length longer than that of the downstream transport path 1, the second heating state in which the drying unit is heated more than the first state is provided. If the medium is sent to the second downstream transport path with a long path length, which is likely to cause problems such as paper jamming in the path if the drying is insufficient, the medium is reliably dried. The possibility of the occurrence of the above-mentioned failure can be reduced.
On the other hand, in the case where the medium is sent to the first downstream transport path where the path length is short and the defects are relatively less likely to occur than the second downstream transport path, the running cost of the recording apparatus It can control.

  According to a third aspect of the present invention, in the second aspect, the drying unit includes a roller pair that holds the medium between the first roller and the second roller, and the first roller and the second roller are provided. At least one of the rollers is configured to be heated.

  According to this aspect, the drying unit includes a roller pair that holds the medium between the first roller and the second roller, and at least one of the first roller and the second roller is heated. In the configuration, the effects of the first or second aspect described above can be obtained.

  According to a fourth aspect of the present invention, in the third aspect, the roller pair is in a pinching state in which the medium can be pinched by the first roller and the second roller, the first roller and the second roller And a separated state, wherein the switch is configured to be switchable.

  According to this aspect, the roller pair can hold the medium between the first roller and the second roller, and the separated state in which the first roller and the second roller are separated. Since it is configured to be switchable between each other, for example, when the liquid on the recording surface is highly likely to adhere to the roller pair, the separation state can reduce the degree to which the liquid on the recording surface adheres to the roller pair. .

  According to a fifth aspect of the present invention, in the fourth aspect, the control section changes the first state of the drying section into a non-heating state in which the roller pair is not heated and the separation state, and the drying The second state of the section is characterized in that the heating state for heating the roller pair and the holding state are adopted.

When the first state of the drying unit is a non-heating state in which the roller pair is not heated, the medium immediately after recording contacts the roller pair in a state in which the temperature of the roller pair is low. The liquid on the recording surface may adhere to the roller pair.
However, according to the present aspect, the control unit puts the roller pair in the separated state when the roller pair is not heated without heating, so the roller is lowered in temperature when the roller is not heated. It is possible to suppress the possibility of the liquid on the recording surface adhering to the pair.

  According to a sixth aspect of the present invention, in the fourth aspect, the control section brings the roller pair into the separated state when the roller pair has not reached the target heating state, and the roller pair is the target heating When the state is reached, the roller pair is brought into the nipping state.

For example, if a target heating state is reached when the roller pair as the drying unit reaches a temperature suitable for drying the medium, the medium is not transferred to the roller pair without reaching the target heating state. When in contact, the liquid on the recording surface may adhere to the roller pair.
According to this aspect, when the roller pair does not reach the target heating state, the control unit brings the roller pair into the separated state, and the roller pair reaches the target heating state. Since the roller pair is held in the nipping state, the medium is brought into contact with the roller pair in a state where the roller pair has not reached the target heating state, and the possibility of the liquid on the recording surface adhering to the roller pair is suppressed. it can.

In a seventh aspect of the present invention according to any one of the fourth to sixth aspects, in the pinched state of the roller pair, both the first roller and the second roller advance into the medium transport path. In the separated state of the roller pair, both the first roller and the second roller are retracted from the medium transport path.
It is characterized by

  According to this aspect, since the first roller and the second roller are both retracted from the medium transport path in the separated state of the roller pair, the liquid on the recording surface can be more reliably in the separated state. Can be less likely to adhere to the roller pair.

  According to an eighth aspect of the present invention, in any one of the fourth to sixth aspects, the first roller is provided on the side closest to the recording surface of the medium and is movable back and forth relative to the medium transport path. And a spur which is separated from the medium transport path in the separated state and which can move back and forth with respect to the medium transport path on the side of the nearest recording surface of the medium, wherein the first roller is the medium In the state separated from the conveyance path, the medium is advanced with the medium conveyance path, and the medium is sandwiched between the second roller and the medium.

  According to the aspect, in the separated state of the roller pair, a spur capable of holding the medium between the second roller and the first roller instead of the first roller advances into the medium conveyance path to hold the medium. Therefore, the medium can be transported by the second roller and the spur even in the separated state of the roller pair.

  According to a ninth aspect of the present invention, there is provided a recording apparatus including: a recording unit that discharges a liquid onto a medium to perform recording; a plurality of downstream transport paths that are branched by a branch unit positioned downstream of the recording unit; A drying unit for contacting the medium and drying the medium after recording by heating, and a control unit for controlling the operation of the drying unit, the plurality of downstream transport paths being a first downstream transport The drying unit is not provided in the first downstream transport path, and the second downstream transport path having a path length longer than the first downstream transport path; It is characterized in that it is provided in the second downstream transport path.

According to this aspect, the drying unit is not provided in the first downstream transport path, and is provided in the second downstream transport path whose path length is longer than that of the first downstream transport path. Therefore, when the medium is sent to the second downstream transport path with a long path length, it is likely that a problem such as a paper jam in the path may easily occur if the drying of the medium is insufficient. To reduce the risk of the occurrence of the above-mentioned problems.
On the other hand, when the medium is sent to the first downstream transport path where the path length is short and the occurrence of the problem is less likely to occur, drying by the drying unit is not performed, and the running cost of the recording apparatus is suppressed. it can.

  According to a tenth aspect of the present invention, in any one of the first aspect to the ninth aspect, the control unit controls the drying unit in accordance with conditions under which the medium is dried by the drying unit. To be characterized.

According to this aspect, since the control unit controls the drying unit according to the condition for achieving the drying of the medium by the drying unit, unnecessary power consumption is suppressed, and the running cost in the recording apparatus is suppressed. can do.
For example, if the conditions for drying the medium are conditions suitable for drying the medium, the drying time by the drying unit is shortened, or the heating temperature for drying is lowered, or for drying. It is possible to suppress the power consumption in the drying unit by not performing the heating, and so on, thereby suppressing the running cost of the recording apparatus.

  According to an eleventh aspect of the present invention, there is provided a recording system including: a recording unit having a recording unit that discharges liquid onto a medium to perform recording; and a plurality of downstream side conveyances branched by a branch unit positioned downstream of the recording unit A path, an adjacent unit provided adjacent to the recording unit for receiving and transporting the medium from the recording unit, a drying unit for contacting the medium and drying the medium after recording by heating, A control unit configured to control the operation of the drying unit, wherein the drying unit is provided in a medium transport path between the recording unit and the branch unit, and the plurality of downstream transport paths are arranged after recording The first downstream transport path connected to the first discharge unit that discharges the medium without passing it to the adjacent unit and the adjacent unit path that is the medium transport path of the adjacent unit after the medium after recording is transported And the second downstream transport route connected to the second discharge unit to be discharged to the second discharge unit, wherein the control unit is configured to determine which one of the plurality of downstream transport routes the medium after recording by the recording unit is performed. The operation of the drying unit is controlled according to whether it is sent to a route.

  According to this aspect, the drying unit is provided on the transport path between the recording unit and the branch unit, so that the medium after recording by the recording unit is the plurality of downstream transport paths. In any of the above-described routes, one drying unit can efficiently dry the medium after recording.

  In addition, the control unit controls the operation of the drying unit according to which one of the plurality of downstream transport paths the medium after recording by the recording unit is sent, and wastes power. The consumption can be suppressed, and the running cost of the recording apparatus can be suppressed.

  According to a twelfth aspect of the present invention, there is provided a recording system comprising: a recording unit having a recording unit that discharges liquid onto a medium to perform recording; and a plurality of downstream side conveyances branched by a branch unit positioned downstream of the recording unit A path, an adjacent unit provided adjacent to the recording unit, receiving the medium from the recording unit and transporting the medium, and a drying unit for contacting the medium and drying the medium after recording by heating The plurality of downstream transport paths are a first downstream transport path connected to a first discharge unit that discharges the medium after recording without passing the medium to the adjacent unit, and the medium after recording is the adjacent unit And a second downstream transport path connected to the second discharge unit which is discharged after being transported through the adjacent unit path which is the medium transport path, and the drying unit is connected to the first downstream transport path. Setting Is not provided on the second downstream transport path, it is characterized.

The medium sent to the second downstream transport path has a longer path length to discharge than the case where it passes through the first downstream transport path because the medium is delivered to the adjacent unit. . When the length of the path is long, problems such as paper jamming in the path caused by insufficient drying of the medium are likely to occur.
According to this aspect, of the first downstream transport path and the second downstream transport path, the drying unit is a side where the length of the path leading to the discharge becomes longer, that is, the second downstream Since it is provided on the side of the side conveyance path, it is possible to reduce the possibility of the occurrence of the problem.

  On the other hand, when the medium is sent to the first downstream transport path where the path length is short and the occurrence of the problem is less likely to occur, drying by the drying unit is not performed and unnecessary power consumption is avoided. Can reduce running costs.

FIG. 1 is a schematic view of a recording system according to the present invention. FIG. 3 is a side sectional view of a part of the recording unit and the relay unit. FIG. 6 is a diagram for explaining a conveyance path at the time of duplex recording. The figure explaining the composition of a heat roller pair. 7 is a flowchart showing a flow of controlling the operation of the heat roller pair in accordance with the conveyance destination of the sheet after recording by the control unit. The figure which shows the division according to the relation of temperature and humidity in a dry environment. 7 is a flowchart showing a flow of controlling the operation of the heat roller pair using a plurality of conditions as the conditions for drying the sheet by the heat roller pair. FIG. 5 is a schematic view showing a recording system according to a second embodiment. Schematic which shows the conveyance path of a relay unit path | route. Schematic which shows the 1st path | route in a relay unit path | route. FIG. 7 is a schematic view showing a second route in the relay unit route.

First Embodiment
Hereinafter, an example of an embodiment of the present invention will be described based on the drawings.
FIG. 1 is a schematic view of a recording system according to the present invention. FIG. 2 is a side sectional view of a part of the recording unit and the relay unit. FIG. 3 is a view for explaining the conveyance path at the time of double-sided recording. FIG. 4 is a diagram for explaining the configuration of the heat roller pair. FIG. 5 is a flow chart showing a flow in the case where the control unit controls the operation of the heat roller pair in accordance with the conveyance destination of the sheet after recording. FIG. 6 is a diagram showing division according to the relationship between temperature and humidity in a dry environment. FIG. 7 is a flow chart showing a flow in the case where the control unit controls the operation of the heat roller pair using a plurality of conditions as the conditions for drying the sheet by the heat roller pair.

  Further, in the X-Y-Z coordinate system shown in each drawing, the X-axis direction is the width direction of the medium and indicates the apparatus depth direction, and the Y-axis direction is the medium transport direction in the transport path in the apparatus. The direction is indicated, and the Z-axis direction indicates the device height direction.

■ ■ ■ ■ Overview of the recording system ■ ■ ■
A recording system 1 shown in FIG. 1 includes a recording unit 2 as a “recording device” which performs recording on a sheet as a “medium”, a relay unit 3 and a post-processing unit 4. The recording system 1 includes, as an example, a recording unit 2, a relay unit 3, and a post-processing unit 4 in order from the right to the left in FIG. 1. These devices are connected to each other, and are configured to be able to transport the medium from the recording unit 2 to the post-processing unit 4. In the present embodiment, the relay unit 3 is an “adjacent unit” provided adjacent to the recording unit 2 (recording apparatus).
The recording system 1 inputs processing (such as setting of recording operation conditions and execution instruction thereof) to the medium in the recording unit 2, the relay unit 3 and the post-processing unit 4 from an operation panel (not shown) provided in the recording unit 2. It is configured to be able to.
The schematic configuration of each of the recording unit 2, the relay unit 3, and the post-processing unit 4 will be described below with reference mainly to FIG.

<<< Recording unit >>>
A recording unit 2 (recording apparatus) illustrated in FIG. 1 includes a printer unit 5 including a line head 10 as a “recording unit” that discharges ink as an example of “liquid” onto paper to perform recording, and a scanner unit 6 It is configured as a multi-function device including In the present embodiment, the ink is a water-based ink such as a water-based ink, and the printer unit 5 is a so-called ink jet printer.
The recording unit 2 is configured to be capable of double-sided recording in which recording is performed on the second side (also referred to as the back side) by reversing the paper after recording on the first side (also referred to as the front side) of the sheet. .

At the lower part of the recording unit 2, a plurality of sheet storage cassettes 7 are provided. The sheet stored in the sheet storage cassette 7 is sent to the line head 10, and the recording operation is performed. The sheet after recording by the line head 10 is discharged to either the first discharge unit 8 provided in the recording unit 2 or the second discharge unit 40 provided in the post-processing unit 4.
When the sheet after recording is discharged from the second discharge unit 40, the sheet is sent from the delivery unit 28 to the relay unit 3, and is further sent from the relay unit 3 to the post-processing unit 4. The medium after the post-processing such as cutting and stapling in the post-processing unit 4 is discharged to the second discharge unit 40.
The medium transport path in the printer unit 5 will be described in detail later.

<<< Relay unit >>
The relay unit 3 (adjacent unit) shown in FIG. 1 is disposed between the recording unit 2 and the post-processing unit 4 and receives the sheet delivered from the delivery unit 28 by the upstream side relay unit 34 and uses the line head 10. The recording sheet is conveyed from the recording unit 2 to the post-processing unit 4.
The sheet conveyed in the relay unit 3 is sent from the downstream relay unit 35 provided in the relay unit 3 into the post-processing unit 4 via the receiving unit 41 of the post-processing unit 4.
The details of the relay unit path 32 (adjacent unit path) which is the medium transport path in the relay unit 3 will be described after the description of the present embodiment (the first embodiment) and the second embodiment to be described later.

<<< Post-processing unit >>>
Further, the post-processing unit 4 shown in FIG. 1 is configured to perform post-processing on the sheet recorded in the recording unit 2. Examples of post-processing include cutting, paper folding, punching, stapling, sorting and the like.
Details of the medium transport path (post-processing unit path 33) in the post-processing unit 4 will also be described later together with the relay unit path 32 in the printer unit 5.

■■■ About the medium transport route of the recording unit ■■■
Next, the medium transport path in the recording unit 2 will be described with reference to FIG.
In FIG. 2, a dotted line indicated by reference numeral T indicates a part of the medium transport path from the sheet storage cassette 7. The medium transport path T is configured to include a feed path 14 for feeding the sheet picked up from the sheet storage cassette 7 and a straight path 12 connected to the feed path 14 and including a recording area by the line head 10 There is.

Further, on the downstream side of the straight path 12, a first downstream transport path 13 (shown by a two-dot chain line in FIG. 2) for feeding the sheet to the first discharge unit 8 and a delivery section 28 are shown in FIG. A recording unit path 31 (indicated by an alternate long and short dash line in FIG. 2) which constitutes a second downstream transport path 30 which is a path to the second discharge unit 40 of the post-processing unit 4 is provided.
The first downstream side transport path 13 and the second downstream side transport path 30 are both transport paths of the sheet after recording. In other words, it is a plurality of downstream conveyance paths which branch at the branch portion G1 located on the downstream side of the line head 10. The first downstream transport path 13 is a path connected to the first discharge unit 8 that discharges the sheet after recording without passing it to the relay unit 3. That is, the path from the downstream side of the line head 10 to the first discharge unit 8. The second downstream transport path 30 is a path connected to the second discharge unit 40 which is discharged after the sheet after recording is transported through the relay unit path 32 which is the medium transport path of the relay unit 3. That is, the path from the downstream side of the line head 10 to the second discharge unit 40.
In the present embodiment, the second downstream transport path 30 is a path that is longer than the first downstream transport path 13.

In the medium transport path between the line head 10 and the branch section G1, a heat roller pair 11 is provided as a "drying section" which contacts the sheet to be transported and dries the sheet after recording by heating. ing. The detailed configuration of the heat roller pair 11 will be described after the description of the medium transport path in the recording unit 2.
In the present embodiment, the heat roller pair 11 is provided immediately downstream of the belt conveyance means 20 described later.

In the branch portion G1 where the straight path 12 branches into the first downstream side conveyance path 13 and the recording unit path 31 constituting the second downstream side conveyance path 30, the conveyance destination of the sheet after recording is A switching unit 26 such as a guide flap that switches between the second downstream transport path 30 connected to the delivery unit 28 and the first downstream transport path 13 connected to the first discharge unit 8 is provided. In other words, the switching unit 26 is configured to switch whether to send the sheet to the first downstream transport path 13 or to the second downstream transport path 30 (recording unit path 31). The operation of the switching unit 26 is controlled by the control unit 27. The control unit 27 controls operations related to recording including conveyance of a sheet in the recording unit 2, operation of the switching unit 26, and operation of the heat roller pair 11 (drying unit).
The present invention is characterized in the control of the operation of the heat roller pair 11 by the control unit 27. The control of the operation of the heat roller pair 11 performed by the control unit 27 will also be described after the medium transport path of the recording unit 2 is described.
Hereinafter, the medium conveyance path in the recording unit 2, that is, conveyance of a sheet from the sheet storage cassette 7 to the first discharge unit 8 and conveyance of a sheet when performing double-sided recording will be described.

<<< About the medium conveyance path from the sheet storage cassette to the first discharge unit >>>
The feed path 14 shown in FIG. 2 is provided with a feed roller 17 and a separation roller pair 18 for separating a plurality of sheets into one sheet in order along the medium transport direction.
The feed roller 17 is configured to be rotationally driven by a drive source (not shown). The separation roller pair 18 is also referred to as a retard roller, and includes a drive roller 18a for feeding the sheet toward a straight path 12 described later, and a driven roller 18b for nipping and separating the sheet between the drive roller 18a. Is configured.

  A plurality of sheets of paper can be stored in the sheet storage cassette 7, and the uppermost sheet is picked up by the feed roller 17 and transported to the downstream side in the transport direction. At this time, the second and subsequent sheets may be transported together with the top sheet, but the separation roller pair 18 separates the top sheet and the second and subsequent sheets, and only the top sheet is fed. It is sent to the route 14.

A resist roller pair 19 is provided downstream of the separation roller pair 18 in the transport direction. In the present embodiment, the feed path 14 and the straight path 12 are connected at the position of the registration roller pair 19.
The straight path 12 is configured as a path extending substantially linearly, and on the downstream side of the pair of registration rollers 19, a belt conveyance unit 20, a charge removal unit 25, and a line head 10 are provided.
In the present embodiment, the belt conveying unit 20 is disposed in a region facing the head surface of the line head 10, and supports the opposite side of the recording surface of the sheet.

The line head 10 is configured to eject ink (liquid) onto the recording surface of the sheet to execute recording when the sheet is conveyed to the position opposite to the line head 10 on the belt conveyance means 20. The line head 10 is a recording head provided with a nozzle for jetting ink so as to cover the entire width of the sheet, and is configured as a recording head capable of recording over the entire medium width without moving in the medium width direction. ing.
Although the recording unit 2 of the present embodiment includes the line head 10, a serial type recording head which is mounted on a carriage and ejects a liquid onto the medium to perform recording while reciprocating in the direction intersecting the medium conveyance direction. May be provided.

The sheet conveyed on the straight path 12 is subsequently sent to the first downstream side conveyance path 13. At this time, the flap-like switching unit 26 swings so as to close the recording unit path 31 (the second downstream conveyance path 30), and guides the sheet to the first downstream conveyance path 13.
The sheet having entered the first downstream-side conveyance path 13 is conveyed by the conveyance roller pairs 21 and 22 and the conveyance roller pair group 23 and is discharged from the first discharge unit 8, and the medium is loaded with the recording surface down. It is placed on the placing unit 9.

<<< Conveying path when recording on both sides >>>
The recording unit 2 shown in FIG. 2 is configured to be capable of double-sided recording, and is downstream of the line head 10 and upstream of the first downstream transport path 13 (in FIG. The switchback path 15 for double-sided recording branched off from the straight path 12 at the upstream side of the transport roller pair 21 and the switchback path 15 for double-sided recording are connected to reverse the front and back (first and second sides) of the sheet. And an inversion path 16 returning to the straight path 12. Guide flaps 36 and 37 are provided at the connection portion between the straight path 12 and the switchback path 15 for double-sided recording, and at the connection portion between the switchback path 15 for double-sided recording and the reverse path 16, respectively. Switches the path through which paper is fed. The operation of the guide flaps 36, 37 is also controlled by the control unit 27. Further, the control unit 27 also controls the conveyance timing performed by driving the belt conveyance unit 20 and various conveyance roller pairs.

  In the present embodiment, the switchback path 15 for double-sided recording is also a transport path for the sheet after recording, and is one of a plurality of downstream transport paths branched on the downstream side of the line head 10. A branch portion of the double-sided recording switchback path 15 is a branch portion G2. It can be said that the heat roller pair 11 is provided between the line head 10 and the branch portion G2. In the following, the switchback path 15 for double-sided recording may be referred to as a third downstream transport path.

With reference to FIG. 2 and FIG. 3, conveyance of a sheet when performing double-sided recording will be described.
The top diagram of FIG. 3 shows a state in which the line head 10 performs recording on the first side of the sheet. After recording on the first side, as shown in the second drawing from the top of FIG. 3, the sheet (indicated by symbol P in each drawing of FIG. 3) is from straight path 12 to switchback path 15 for double-sided recording (FIG. 2) See also).

Subsequently, the sheet P is fed in the direction (+ Y axis direction) opposite to the direction (+ Y axis direction) sent from the double-sided recording switchback path 15 to the double-sided recording switchback path 15 by the transport roller pair 24 (FIG. 2) Direction and enter the reverse path 16 and the recording surface is reversed to enter the straight path 12 again, and recording on the second surface by the line head 10 is performed (second figure from the bottom of FIG. 3) . In FIG. 2, reference numeral 29 denotes a transport roller pair provided in the reverse path 16.
The sheet P on which printing is performed on both sides enters the first downstream transport path 13 from the straight path 12, is discharged from the first discharge unit 8, and is placed on the medium placement unit 9 (FIG. 2). (Figure at the bottom of Figure 3).

■■■ About the composition of the heat roller pair ■■■
Hereinafter, the structure of the heat roller pair as a "drying part" is demonstrated.
As shown in FIG. 2, the heat roller pair 11 is a roller pair that holds a sheet by the drive roller 11 a as the “second roller” and the driven roller 11 b as the “first roller”.
In the present embodiment, both the drive roller 11a and the driven roller 11b are configured to be heated.
The heat roller pair 11 may have a configuration in which at least one of the drive roller 11 a and the driven roller 11 b constituting the heat roller pair 11 is heated. That is,
Either of the driving roller 11a and the driven roller 11b can be heated. If both the drive roller 11a and the driven roller 11b are heated, it is possible to heat the both sides of the sheet and realize more reliable sheet drying.

As an example, heating of the driving roller 11a and the driven roller 11b may be performed by using an induction heating system in which an induction coil (not shown) is provided inside the roller and the roller generates heat by the action of a magnetic field generated by flowing current through the induction coil. it can.
The heating temperature of the driving roller 11a and the driven roller 11b can be adjusted by turning on and off the heating. Further, for example, the adjustment can be made possible by controlling the duty ratio of the current.
Each of the driving roller 11a and the driven roller 11b is provided with a temperature detection unit (not shown) that detects the roller temperature.
Moreover, heating of the driving roller 11a and the driven roller 11b can be configured to be individually controllable.

As shown in the left view of FIG. 4, the heat roller pair 11 is in a sandwiching state in which the sheet can be pinched by the drive roller 11a and the driven roller 11b, and as shown in the middle view of FIG. 4 and the right view of FIG. It is configured to be switchable between a separated state in which the drive roller 11a and the driven roller 11b are separated. This can reduce the degree to which the ink on the recording surface adheres to the heat roller pair 11.
Hereinafter, among the separated states, the state shown in the middle view of FIG. 4 is referred to as a first separated state, and the state shown in the right view of FIG. 4 is referred to as a second separated state.

  More specifically, in the holding state of the heat roller pair 11 (the left view in FIG. 4), both the drive roller 11a and the driven roller 11b are the medium transport path (the path where the sheet P is located in each view in FIG. 4) It is configured to advance to

Further, in the first separated state (the middle view in FIG. 4) of the heat roller pair 11, both of the drive roller 11a and the driven roller 11b are configured to retract from the medium conveyance path. Hereinafter, an example of the configuration for retracting the drive roller 11a and the driven roller 11b from the medium conveyance path will be described.
The drive roller 11a is configured to be able to advance and retract in the Z-axis direction. More specifically, as shown in FIG. 4, the drive roller 11 a is held by the holder 85, and the holder 85 is pressed by the pressing member 86 to press the drive roller 11 a toward the medium transport path. It is done.
The drive roller 11a is configured to be displaceable in the Z-axis direction together with the holder 85, and rotates the eccentric cam 87 that receives power from a drive source (not shown) controlled by the control unit 27 and rotates. A holding state in which the driving roller 11a advances into the medium conveyance path and contacts the driven roller 11b (left view in FIG. 4) and a separation state in which the driving roller 11a retracts from the medium conveyance path and separates from the driven roller 11b (figure In the middle of 4) and can be switched.

Further, as shown in each of FIGS. 4A and 4B, the driven roller 11b is rotatably held by the first holding portion 81, and the first holding portion 81 swings with the shaft portion 83 as an axis. It is configured to advance to and retreat from the medium transport path.
Thus, by taking the first separation state in which both the drive roller 11a and the driven roller 11b retract from the medium conveyance path, for example, when the sheet P contacts in a state where heating of each roller is not sufficient, more reliable The possibility that the ink on the recording surface will adhere to the heat roller pair 11 can be reduced.

Further, in the present embodiment, “a spur that can move back and forth relative to the medium conveyance path on the same side as the driven roller 11 b (first roller), that is, the side of the recording surface closest to the sheet (in the present embodiment, upward) In the second separated state where the driven roller 11b is separated from the medium transport path, the Gza roller 84 is advanced to the medium transport path with the drive roller 11a (second roller). It is comprised so that a paper may be clamped between.
Giza roller 84 is rotatably held by second holding portion 82, and pivots following the swing of driven roller 11b around the same shaft portion 83 as first holding portion 81 that holds driven roller 11b. It is configured to
In the second separated state, the drive roller 11a is advanced to the medium transport path.

  As a result, even when the drive roller 11a and the driven roller 11b are separated (the second separated state), the sheet can be transported by the drive roller 11a and the knurled roller 84. In addition, since the roller is a nip roller, transfer of ink on the recording surface can be suppressed. In addition, such a tine roller 84 can also be omitted.

■■■ About control of operation of heat roller by control part ■■■
Subsequently, control of the operation of the heat roller pair 11 by the control unit 27 will be described.
As described above, the heat roller pair 11 (drying unit) includes the line head 10 (recording unit), and the plurality of downstream conveyance paths (the first downstream conveyance path 13 and the second downstream conveyance). It is provided in the medium conveyance path between the branch part G1 which branches to path | route 30). The position where the heat roller pair 11 is provided is also between the line head 10 and the branch portion G2 where the medium transport path branches to the double-sided recording switchback path 15 as the third downstream-side transport path. is there.

  Then, the control unit 27 causes the sheet after recording by the line head 10 to be transferred to a plurality of downstream side conveyance paths [first downstream side conveyance path 13, second downstream side conveyance path 30, switchback path 15 for double-sided recording ( It is configured to control the operation of the heat roller pair 11 according to which route of the third downstream transport route) is sent.

A first downstream conveyance path 13 for discharging a sheet from the first discharge unit 8 provided in the recording unit 2 and a second downstream discharged after being sent to the post-processing unit 4 via the relay unit 3 In the side conveyance path 30, the second downstream side conveyance path 30 is longer than the first downstream side conveyance path 13, and the medium conveyance path is complicated (see FIG. 1).
When a sheet after recording passes through a long and complicated medium transport path, if the sheet is not sufficiently dried after recording, curling that occurs on the sheet after recording, reduction in sheet rigidity due to inclusion of ink (liquid), etc. There is an increased possibility that the sheet may be caught or jammed in the medium transport path due to the Therefore, it is necessary to dry the paper after recording firmly.
On the other hand, when the sheet is conveyed through the first downstream side conveyance path 13 which is a medium conveyance path having a relatively simple shape, the paper may not be sufficiently dried after recording, but the sheet may be conveyed to the medium conveyance path. There is little risk of sticking or clogging. Therefore, some degree of dryness may be sufficient.

Here, the control unit 27 sends the sheet recorded by the line head 10 to any one of the first downstream conveyance path 13, the second downstream conveyance path 30, and the double-sided recording switchback path 15. By controlling the operation of the heat roller pair 11 depending on whether it is possible or not, unnecessary power consumption can be suppressed, and the running cost of the recording unit 2 (recording apparatus) can be reduced.
Hereinafter, the present invention will be further described with reference to specific examples.

As described above, the recording system 1 includes, as the plurality of downstream transport paths, the first downstream transport path 13 and the second downstream transport path 30 having a path length longer than that of the first downstream transport path 13. And contains.
Then, when the sheet after recording is sent to the first downstream conveyance path 13, the control unit 27 sets the heat roller pair 11 in the first state, and the sheet after recording is the second downstream conveyance path 30. The heat roller pair 11 is brought into a second state in which the heat roller pair 11 is heated more than the first state.

Describing with reference to the flowchart shown in FIG. 5, the control unit 27 determines to which downstream transport path the sheet after recording is transported (step S1).
If it is determined in step S1 that the sheet after recording is transported to the first downstream transport path 13 which is a medium transport path of a relatively simple shape, heating of the heat roller pair 11 is performed second The sheet is dried in the first state suppressed from the state of (1) (step S2). When it is determined in step S1 that the sheet after recording is conveyed to the second downstream conveyance path 30 which is more complicated than the first downstream conveyance path 13 and has a long path length, the heat roller The sheet is dried in the second state where the pair 11 is heated more than the first state (step S3).
When the heating of the heat roller pair 11 is suppressed in the first state, the heating may be turned off, that is, not heated.

By executing such control, the control unit 27 may cause a problem such as a paper jam in the path if the drying of the sheet is insufficient. In addition, when the sheet after recording is fed, the sheet can be reliably dried, and the possibility of occurrence of a problem can be reduced.
On the other hand, in the case where the sheet after recording is sent to the first downstream side conveyance path 13 where the path length is short and a defect is relatively less likely to occur than the second downstream side conveyance path 30, Heating can be suppressed, and the running cost of the device can be suppressed.

Further, the control unit 27 controls the degree of heating of the heat roller pair 11, for example, the heating state of the heat roller pair 11 is the same (for example, the second state), and the sheet after recording is downstream It is also possible to execute control to change the heating time depending on whether it is transported to the side transport path.
Specifically, when the sheet after recording is conveyed to the first downstream conveyance path 13, the heating time of the heat roller pair 11 is the first heating time, and the sheet after recording is the second. When transported to the downstream transport path 30, the heating time of the heat roller pair 11 is set to a second heating time which is relatively longer than the first heating time. Also by this, the certainty of drying of the sheet conveyed to the second downstream side conveyance path 30 is enhanced, and the first downstream side where a defect is relatively less likely to occur than the second downstream side conveyance path 30 When the sheet after recording is fed to the conveyance path 13, the heating time of the heat roller pair 11 can be shortened to suppress the running cost of the apparatus.

The operation of the heat roller pair 11 is controlled by the control unit 27 also when the sheet after recording is conveyed to the double-sided recording switchback path 15 as the “third downstream side conveyance path”.
Since the sheet transported to the switchback path 15 for double-sided recording is transported to the reverse path 16, as a result, the path length is longer than the first downstream side transport path 13 and the path is curved in many ways. Medium transport path is transported. Therefore, for example, the sheet can be dried under the same conditions as the second downstream transport path 30.
In addition, since the switchback path 15 for double-sided recording and the reverse path 16 have a path length shorter than that of the second downstream side transport path 30 and the shape of the path is also simple, the sheet is fed to the first downstream side transport path 13. Although the heat roller pair 11 is heated more than when it is fed, the heating of the heat roller pair 11 can also be suppressed more than when the paper is fed to the second downstream transport path 30.

  In addition, since the heat roller pair 11 is provided on the medium conveyance path on the upstream side of the branch portions G1 and G2 branched to the plurality of downstream conveyance paths, the sheet after recording by the line head 10 is a plurality of downstream The sheet can be dried by one heat roller pair 11 regardless of which side of the side conveyance path it is sent to, and the increase in size and cost of the apparatus can be suppressed.

◆ ◆ About switching between the first and second states of the heat roller pair ◆ ◆
The switching between the first state and the second state of the heat roller pair 11 may be performed as follows.
That is, the control unit 27 sets the first state of the heat roller pair 11 to the unheated state in which the heat roller pair 11 is not heated and to the separated state (the middle view in FIG. 4 or the right view in FIG. 4) The second state of the pair 11 is a heating state for heating the heat roller pair 11 and a holding state (left view in FIG. 4).

When the heat roller pair 11 is in the first state, the power consumption can be effectively suppressed if the heat roller pair 11 is not heated, but the power consumption can be effectively suppressed. However, the heat roller pair 11 is not heated. In the non-heating state, the sheet immediately after recording comes into contact with the heat roller pair 11 in a state where the temperature of the heat roller pair 11 is lowered. Since the ink easily adheres to the roller surface having a low temperature, the ink on the recording surface may adhere to the heat roller pair 11.
However, when the control unit 27 puts the heat roller pair 11 into the separated state when the heat roller pair 11 is not heated, recording is performed on the heat roller pair 11 in which the temperature is lowered due to the non-heating state. It is possible to suppress the possibility that the ink on the surface adheres.

Further, when the heat roller pair 11 reaches a temperature suitable for drying the paper as the target heating state, the temperature of the heat roller pair 11 in the target heating state is set to a high temperature of around 180 ° C. as an example. Ru.
For this reason, it may take time from the start of heating of the heat roller pair 11 to the temperature rise to the target heating state. If the low temperature heat roller pair 11 which is not in the target heating state is held, the ink on the recording surface may adhere to the low temperature heat roller pair 11.

Therefore, the control unit 27 separates the heat roller pair 11 when the heat roller pair 11 does not reach the target heating state, and sets the heat roller pair 11 when the heat roller pair 11 reaches the target heating state. Hold it in place.
As a result, it is possible to suppress the possibility that ink may be attached to the recording surface of the heat roller pair 11 when the sheet contacts the heat roller pair 11 when the heat roller pair 11 has not reached the target heating state.

Further, the control unit 27 can also perform control to make a difference between the heating state of the driven roller 11 b and the heating state of the driving roller 11 a in the heat roller pair 11.
For example, the driven roller 11b is controlled to be heated more than the driving roller 11a. Since the driven roller 11b in contact with the most recent recording surface is heated more than the drive roller 11a in contact with the opposite surface of the most recent recording surface, power consumption can be suppressed while drying of the recording surface is reliably performed.

■ ■ ■ ■ Other examples of control of heat roller pair operation by control unit ■ ■ ■
As described above, the control unit 27 controls the operation of the heat roller pair 11 in accordance with which downstream conveyance path the recording sheet is conveyed, and further, the heat roller pair 11 The heat roller pair 11 can be controlled according to the conditions for achieving drying.
For example, when it is determined that the sheet after recording is conveyed to the second downstream conveyance path 30 which is more complicated than the first downstream conveyance path 13 and has a long path length, the second of the heat roller pair 11 The state of can be changed in accordance with the conditions for drying the sheet by the heat roller pair 11.
Similarly, when the heat roller pair 11 attempts to dry the sheet in the first state of the heat roller pair 11 when it is determined that the sheet after recording is conveyed to the first downstream conveyance path 13 It can be changed according to the conditions of

  Conditions for drying the sheet by the heat roller pair 11 include, for example, the type of sheet, sheet size, ink discharge amount, margin amount, sheet conveyance speed, and the recording surface of the nearest sheet has already been recorded. The recording environment (temperature, humidity), etc. may be mentioned as to whether or not it is the back side of the surface. The type of paper includes, in addition to the material, a type based on differences in thickness, basis weight (weight per unit area), and the like.

By controlling the heat roller pair 11 according to the conditions under which the control unit 27 attempts to dry the sheet by the heat roller pair 11, it is possible to suppress unnecessary power consumption.
For example, if the conditions for drying the paper are the conditions suitable for drying the paper, the drying time by the heat roller pair 11 is shortened, or the heating temperature for drying is lowered, or the drying is performed. Power consumption in the heat roller pair 11 can be suppressed by not performing heating or the like.
Control of the operation of the heat roller pair 11 will be described with reference to a specific example of the conditions under which the sheet is dried by the heat roller pair 11.

◆ ◆ Control by conditions when trying to dry the paper by heat roller pair ◆ ◆ ◆
<< Control according to paper type >>
Examples of the sheet used in the recording unit 2 of the recording system 1 include, in addition to so-called plain paper, coated paper with a coating agent applied on the surface, postcards, envelopes, and the like.
The control unit 27 can control the operation of the heat roller pair 11 according to the sheet type.
Table 1 shows an example of operation control of the heat roller pair 11 according to the sheet type.

The control unit 27 sets the heat roller pair 11 to a low temperature when the sheet type is a coated paper, a postcard, or an envelope, and sets the heat roller pair 11 to a high temperature when the sheet type is a plain sheet.
The high temperature and the low temperature in Table 1 show the relative relationship (high and low of temperature) with each other. The same applies to the high and low temperatures described in the following tables.
If the recorded paper is plain paper, drying is performed by a high temperature heat roller pair 11. On the other hand, since coated paper is coated with a coating agent on the surface, heating may damage the coating agent. Therefore, drying is performed with the heat roller pair 11 that is relatively cooler than in the case of drying plain paper.
In addition, in the case of postcards that are thicker than plain paper, and envelopes that have doubled sheets, when plain paper is dried because the risk of the paper being curled or its rigidity becoming low due to the ejected ink is low. The drying is carried out with a heat roller pair 11 relatively cooler than that.
The heat roller pair 11 may turn off heating, that is, not heat.
As described above, since the temperature of the heat roller pair 11 is switched according to the sheet type, the power consumption of the heat roller pair 11 can be suppressed.

  In the above, the control for switching the temperature of the heat roller pair 11 is taken as an example, but it is also possible to perform control to shorten the heating time by the heat roller pair 11. Hereinafter, also when the temperature is switched as the operation control of the heat roller pair 11 as an example, the heating time is taken as an example, also when describing other conditions when drying the sheet by the heat roller pair 11 is described. It is possible to control to change.

<< Control according to paper basis weight >>
For example, even if the paper type (paper quality) is the same, the paper basis weight (g / m ² ) may be different.
The control unit 27 can control the operation of the heat roller pair 11 according to the paper basis weight.
Table 2 shows an example of the operation control of the heat roller pair 11 according to the paper basis weight.

A sheet having a large basis weight and a thickness is less likely to cause curling due to ink absorption than a sheet having a small basis weight and a thin sheet. Therefore, as an example, when the paper basis weight is less than 100 g / m ^2, drying with the low temperature heat roller pair 11 is performed. Further, when the paper basis weight is 100 g / m ² or more, drying is performed by the heat roller pair 11 having a relatively high temperature as compared with the case where the paper having the paper basis weight less than 100 g / m ² is dried.
As described above, since the temperature of the heat roller pair 11 is switched according to the paper basis weight, the power consumption of the heat roller pair 11 can be suppressed.
Incidentally, the sheet basis weight 100 g / ^{m 2} less than condition, divided more finely (for example, less than ^{60g / m 2, 60g / m} 2 or more 80 g / ^m less than ^2, 80 g / ^{m 2} or more 100 g / ^{m 2} less than the like), As the basis weight decreases, the heating temperature can be lowered stepwise or the heating time can be shortened stepwise.

<< Control according to the paper size >>
The control unit 27 can control the operation of the heat roller pair 11 in accordance with the sheet size.
Table 3 shows an example of operation control of the heat roller pair 11 according to the sheet size.

Generally, when the sheet size is small, such as a postcard size, the thickness of the sheet is large, and there is little possibility that the sheet curls or the rigidity decreases due to the discharged ink, so the heat roller in the first state is Drying is performed with the pair 11.
As described above, since the temperature of the heat roller pair 11 is switched according to the sheet size, the power consumption of the heat roller pair 11 can be suppressed.

<< Control according to the ink discharge amount >>
The control unit 27 can control the operation of the heat roller pair 11 in accordance with the discharge amount W (ml / m ² ) of the ink on the sheet.
Table 4 shows an example of operation control of the heat roller pair 11 according to the discharge amount W of the ink on the sheet.

When the discharge amount W of the ink onto the sheet is large, the sheet is easily curled, and the rigidity of the sheet is lowered, so that the sheet is easily caught on the medium conveyance path. In addition, the ink on the recording surface easily adheres to various rollers and the like.
Therefore, in order to reliably dry a sheet having a large discharge amount W of ink, for example, when the discharge amount W (ml / m ² ) of the ink per unit area on the sheet exceeds a predetermined threshold value W1, Drying is performed by a high temperature heat roller pair 11. Further, when the ejection amount W of ink is not so large and is equal to or less than the predetermined threshold value W1, the ejection amount W (ml / m ² ) of ink per unit area onto the sheet is equal to the predetermined threshold value W1. Drying is performed by the heat roller pair 11 which is relatively lower temperature than the high temperature when it is exceeded.

As described above, since the temperature of the heat roller pair 11 is switched according to the discharge amount W of the ink onto the sheet, the power consumption of the heat roller pair 11 can be suppressed.
The condition of the ink discharge amount W can be divided finely, and for example, as the ink discharge amount W decreases, the heating temperature can be lowered stepwise or the heating time can be shortened stepwise.

<< Control according to the margin amount >>
The control unit 27 can control the operation of the heat roller pair 11 according to the margin amount N (mm) of the leading end area of the sheet.
Table 5 shows an example of operation control of the heat roller pair 11 according to the margin amount N of the leading end area of the sheet.

When the margin amount N of the leading end area of the sheet is small, the leading end of the sheet tends to curl. For this reason, it becomes easy to be caught in the medium conveyance path. Conversely, when the margin amount N of the leading end region of the sheet is large, curling tends not to occur easily at the leading end of the sheet.
Therefore, for example, when the margin amount N of the sheet in the leading end region of the sheet is equal to or less than the predetermined threshold N1, the drying by the high temperature heat roller pair 11 is performed. In addition, when the margin amount N of the sheet in the leading end region of the sheet exceeds the predetermined threshold N1, the heat roller having a temperature relatively lower than that in the case where the margin amount N of the sheet in the leading portion of the sheet is the predetermined threshold N1 or less Perform drying by pair 11.

It is also possible to finely divide the condition of the margin amount N at the leading end of the sheet, for example, to lower the heating temperature stepwise or shorten the heating time stepwise as the margin amount N increases.
As described above, since the temperature of the heat roller pair 11 is switched according to the margin amount N of the leading end of the sheet, the power consumption of the heat roller pair 11 can be suppressed.

<< Control according to the sheet conveyance speed >>
The control unit 27 can control the operation of the heat roller pair 11 in accordance with the transport speed of the sheet at the time of drying by the heat roller pair 11.
In the present embodiment, the conveyance speed of the sheet conveyed by the belt conveyance means 20 positioned on the upstream side of the heat roller pair 11 is a predetermined conveyance speed V and a speed 3/4 of the conveyance speed V (hereinafter referred to as The speed can be changed to 3/4 V, 1/2 speed (hereinafter, 1/2 V), and 1/4 speed (hereinafter, 1/4 V).
Table 6 shows an example of operation control of the heat roller pair 11 according to the sheet conveyance speed.

When the sheet conveyance speed is high (for example, conveyance speed V, 3/4 V), since the contact time with the heat roller pair 11 is short, drying by the high temperature heat roller pair 11 is performed. Also, when the sheet conveyance speed is high (for example, when the sheet conveyance speed is slow (for example, conveyance speed 1/2 V, 1/4 V), or when the sheet is stopped in the pinched state by the heat roller pair 11) The drying is performed by the heat roller pair 11 which is relatively lower than the high temperature.
As described above, since the temperature of the heat roller pair 11 is switched according to the sheet conveyance speed, the power consumption of the heat roller pair 11 can be suppressed.

<< Control according to whether or not the nearest recording surface of the sheet is the back surface of the surface on which recording has already been performed >>
The control unit 27 can control the operation of the heat roller pair 11 depending on whether the nearest recording surface of the sheet to be dried is the back surface of the surface on which the recording has already been performed. “The recording surface of the most recent sheet is the back side of the side on which the recording has already been performed,” in other words, of the sheet on which the recording has been performed on the second side after the recording on the first side. Point to the second side. “The recording surface of the last sheet is not the back side of the side on which recording has already been performed” means that after recording on the first side in the case of double-sided recording in addition to single-sided recording in the case of simplex recording. Point to the first side of the sheet of paper.
Table 7 shows an example of operation control of the heat roller pair 11 according to the sheet conveyance speed.

With respect to the sheet on which the recording surface of the latest sheet is the first surface, that is, recording is performed only on the first surface, drying is performed by the low temperature heat roller pair 11. On the other hand, since the recording surface of the nearest sheet is the second side, that is, the sheet after double-sided recording tends to have lower rigidity than the sheet after single-sided recording, the more reliable drying is performed. Drying is performed by the heat roller pair 11 having a temperature relatively higher than the low temperature with respect to the recording paper.
As described above, the temperature of the heat roller pair 11 is switched depending on whether the sheet to be dried is the back side of the surface on which the recording surface of the nearest sheet has already been recorded. Power consumption in the

<< Control according to the environment when performing drying >>
The control unit 27 can control the operation of the heat roller pair 11 in accordance with the environment at the time of drying. As an environment for drying, for example, one or both of temperature and humidity can be used. Also, the temperature and humidity can be the temperature and humidity of the room in which the recording system 1 is installed. A humidity measurement unit and a temperature measurement unit (not shown) may be provided in the recording unit 2 and the measurement results may be used.
In the present embodiment, the temperature and humidity environment is divided into nine sections K1 to K9 as shown in FIG. 6, and the operation of the heat roller pair 11 is controlled according to sections K1 to K9.
Table 8 shows an example of the operation control of the heat roller pair 11 according to the temperature and humidity environment.

In terms of temperature and humidity environment alone, the lower the temperature, the harder it is to dry, and the higher the temperature, the easier it is to dry. Therefore, when controlling the operation of the heat roller pair 11 according to the temperature of the temperature and humidity environment, the heating temperature of the heat roller pair 11 is lowered stepwise as the temperature rises, or the heating by the heat roller pair 11 The time can be shortened in stages.
In terms of only the humidity of the temperature and humidity environment, the higher the humidity, the harder it is to dry, and the lower the temperature, the easier it is to dry. Therefore, when controlling the operation of the heat roller pair 11 according to the humidity of the temperature and humidity environment, the heating temperature of the heat roller pair 11 is lowered stepwise as the humidity decreases, or the heating by the heat roller pair 11 is performed. The time can be shortened in stages.

As mentioned above, since the temperature of the heat roller pair 11 is switched according to the environment at the time of drying, the power consumption in the heat roller pair 11 can be suppressed.
Among the conditions for drying the sheet described above, the operation of the heat roller pair 11 may be controlled according to the conditions that particularly affect the ease of drying the sheet.
For example, conditions such as the ink discharge amount, the type of sheet, double-sided recording or single-sided recording, and the like are particularly likely to affect the ease with which the sheet is dried. In addition, depending on the season, the influence of the drying environment (temperature, humidity) also increases. By preferentially using such conditions, the operation of the heat roller pair 11 (for example, temperature switching) can be effectively controlled, and power consumption can be efficiently suppressed.

In addition, each condition such as paper type, paper size, ink discharge amount, margin amount, ... has a unique coefficient that changes according to the difference in the condition, and the heat roller pair is applied by multiplying the coefficient It is also possible to decide the operation of 11.
For example, the reference temperature when the sheet after recording is conveyed to the second downstream conveyance path 30 and the sheet is dried by the heat roller pair 11 in the second state is set to T1. The reference temperature T1 is a constant temperature which is determined regardless of the drying environment.
And based on this reference temperature T1, T1 is fluctuate | varied according to dry environment. For example, in the case of the high temperature classification in Table 8, the reference temperature T1 is multiplied by a factor (for example, “1.2” or the like) larger than one. Conversely, in the case of the low temperature division, the reference temperature T1 is multiplied by a factor smaller than 1 (for example, “0.8” or the like). By doing this, more appropriate drying can be performed.

In this case, the final temperature of the heat roller pair 11 may be determined by sequentially multiplying coefficients according to other conditions.
Furthermore, in this case, the coefficients may be made different in consideration of the magnitude of the influence on the ease of drying of the sheet. For example, the paper size is considered to have a smaller influence on the ease of drying of the paper than in terms of the ink discharge amount, the paper type, and the like.
Therefore, the above coefficient in the case of the high temperature division from the viewpoint of the paper size is set to, for example, “1.1”, and the above coefficient in the case of the high temperature division from the viewpoint of the discharge amount of ink is set to The weighting may be performed according to the conditions. In this case, for example, the paper type, the ink discharge amount, the margin amount, and the viewpoint of whether or not the nearest recording surface is the back surface of the surface on which the recording has already been made. It can be said that the weight is heavier than these viewpoints.

◆ ◆ About control using multiple conditions ◆ ◆
The control unit 27 can control the heat roller pair 11 based on a plurality of conditions using a plurality of conditions as the conditions for drying the sheet by the heat roller pair 11.
As the plurality of conditions, the ejection amount of ink, the type of paper (paper type, basis weight, thickness, rigidity, etc.), the size of the paper, the temperature in the drying environment, the humidity in the drying environment, and the paper And at least two of whether the recording area of the last sheet is the back side of the side on which the recording has already been made and the sheet conveyance speed.

Hereinafter, an example of control using a plurality of conditions will be described with reference to the flowchart shown in FIG.
The control unit 27 first determines whether the recording surface of the nearest sheet is the back surface of the surface on which the recording has already been performed (step S11). If the nearest recording surface of the sheet is not the back surface of the already recorded surface (NO in step S11), the process advances to step S12, and the most recent recording surface of the sheet is the back surface of the already recorded surface. If there is (YES in step S11), the process proceeds to step S15.
In the following, "when the most recent recording surface is not the back surface of the surface on which recording has already been performed" is referred to as one side recording, and "when the most recent recording surface is the back surface of the surface on which recording is already performed" Is called single-sided recording.

Subsequently, the control unit 27 determines the size division of the sheet in step S12 or step S15.
In the present embodiment, A4, A5, A6, B5, B6, or letter (LTR) is small, and larger sizes (for example, A3, B4, legal (LGL) size, etc.) are large. .

Here, the control unit 27 sets “small-sized sheet after single-sided recording”, “large-sized sheet after single-sided recording”, “small-sized sheet after double-sided recording”, and “large after double-sided recording”. Four control tables (first to fourth tables) corresponding to the discharge amount of the ink, the temperature in the drying environment, the humidity in the drying environment, and the transport speed of the Table). Table 9 shows an example of a first table which is a control table for small size paper after single-sided recording. Table 10 shows an example of a second table which is a control table for large size paper after single-sided recording. Table 11 shows an example of a third table which is a control table for small size paper after double-sided recording. Table 12 shows an example of a fourth table which is a control table for large size paper after double-sided recording.
Note that in each table, the recording density (%) is a value that increases or decreases according to the ink ejection amount, and the total ink with respect to the maximum ink injection amount (g) to the recordable area of one sheet of paper It is a ratio of the discharge amount (g). That is, the recording density (%) = 1 the total ink ejection amount (g) to the sheet of paper / the maximum ink ejection amount (g) × 100. The maximum ink injection amount (g) to the recordable area of one sheet of paper can be obtained from the maximum ink injection amount (g) per unit area by the line head 10 provided in the recording unit 2.
Further, the invention is not limited to this, and the recording density (%) can also be a ratio of the area of the area where the ink is discharged to the area of one sheet of paper.

Then, if it is determined in step S12 that the sheet is a small size, the process proceeds to step S13, and the operation of the heat roller pair 11 is controlled using the first table (Table 9). If it is determined in step S12 that the sheet is large in size, the process proceeds to step S14, and the operation of the heat roller pair 11 is controlled using the second table (Table 10).
If it is determined in step S15 that the sheet is small, the process proceeds to step S16 to control the operation of the heat roller pair 11 using the third table (Table 11). If it is determined in step S15 that the sheet is large in size, the process proceeds to step S17, and the operation of the heat roller pair 11 is controlled using the fourth table (Table 12).

  As described above, the control unit 27 controls the heat roller pair 11 more appropriately by controlling the heat roller pair 11 based on a plurality of conditions using a plurality of conditions as the conditions for drying the sheet by the heat roller pair 11. The roller pair 11 can be controlled, and thus the power consumption of the heat roller pair 11 can be further reduced.

■ ■ ■ ■ Other configuration of the recording unit ■ ■ ■
Hereinafter, other configurations in the recording unit 2 according to the present embodiment will be described.
The recording unit 2 (FIG. 2) is configured to be capable of feeding a sheet from the manual feed tray 70, in addition to the case where the sheet stored in the sheet storage cassette 7 is fed for recording. In FIG. 2, the dotted line R indicates the transport path when the sheet is fed from the manual feed tray 70.
The sheet fed from the manual feed tray 70 is fed by the conveyance roller pair 71, joins the straight path 12, and recording is performed by the line head 10. In the case of double-sided recording, after recording on the first side, it is reversed through the switchback path 15 for double-sided recording and the reverse path 16 and recording on the second side is performed.
The sheet after recording is continued to the straight path 12, conveyed on the fourth downstream side conveyance path 74 linearly extended, and is placed on the paper discharge tray 73 through the discharge unit 72.

  Since the fourth downstream transport path 74 is short and the shape is substantially linear and simple, when the sheet after recording is sent to the fourth downstream transport path 74, the first downstream transport path As in the case where the sheet is fed to 13, it is desirable that the sheet be dried in the first state.

In the present embodiment, the recording system 1 is configured by combining the individual recording unit 2, the relay unit 3, and the post-processing unit 4. However, the recording unit 2, the relay unit 3, and the post-processing unit A recording system in which 4 is integrated can also be used.
The recording unit 2 also performs various operations of the heat roller pair 11 under the control of the control unit 27 even when relay units and post-processing units having other configurations than the relay unit 3 and the post-processing unit 4 are connected. The control is configured to be executable.

Second Embodiment
In the present embodiment, a recording system 1A including a recording unit 2A having a different arrangement of heat roller pairs as the “drying unit” will be described with reference to FIG. FIG. 8 is a schematic view showing a recording system according to a second embodiment. It is.
In the present embodiment, the same components as in the first embodiment are given the same reference numerals as in the first embodiment, and the description thereof is omitted.

In the recording unit 2A (recording system 1A), the heat roller pair 11A as a "drying unit" which contacts the paper and dries the paper after recording by heating is fed the paper after recording, and the first downstream side Among the plurality of downstream transport paths including the transport path 13 and the second downstream transport path 30 having a path length longer than the first downstream transport path 13, the first downstream transport path 13 It is not provided but provided in the second downstream transport path 30.
More specifically, the heat roller pair 11A is provided in the recording unit path 31 of the recording unit 2A. In other words, it is provided in the medium transport path between the branch part G and the delivery part 28.

Since the heat roller pair 11A is not provided in the first downstream conveyance path 13 but is provided in the second downstream conveyance path 30, the paper in the path is considered to be insufficiently dried. In the case where the sheet is fed to the second downstream transport path 30 having a long path length in which a defect such as clogging easily occurs, the sheet can be reliably dried, and the possibility of the occurrence of the defect can be reduced.
On the other hand, when the sheet is sent to the first downstream transport path 13 where the path length is short and problems are not likely to occur, drying by the drying unit is not performed, and unnecessary power consumption is avoided, and the running cost of the recording apparatus Can be suppressed.

The heat roller pair 11A provided in the recording system 1A is not limited to the inside of the recording unit 2A as long as it is the second downstream side conveyance path 30, and can also be provided in the relay unit 3, for example. As an example, the most upstream transport roller pair 38 can be a heat roller pair.
Depending on the shape and path length of the medium transport path (relay unit path 32) in the relay unit 3, the heat roller pair 11A can be provided in the medium transport path (post-processing unit path) of the post-processing unit 4.

<<< About the path when the sheet is sent to the second discharge unit via the relay unit >>>
In the following, mainly with reference to FIG. 9 to FIG. 11, the second downstream side transport path 30, which is a medium transport path when the sheet after recording in the line head 10 is discharged from the second discharge unit 40, will be described. .
FIG. 9 is a schematic view showing a transfer route of the relay unit. FIG. 10 is a schematic diagram showing a first route in the relay unit route. FIG. 11 is a schematic view showing a second route in the relay unit route.

As shown in FIG. 1, the second downstream transport route 30 includes the recording unit route 31 described above, a relay unit route 32 which is a transport route in the relay unit 3, and a post-processing which is a transport route in the post-processing unit 4. And a unit path 33.
The sheet after recording is sent from the delivery unit 28 of the recording unit 2 to the relay unit 3. Specifically, the sheet after recording is sent to the recording unit path 31 (FIG. 2), passes through the delivery unit 28, and enters the relay unit path 32 from the upstream relay unit 34 of the relay unit 3.

  The relay unit path 32 will be described below with reference to FIG. In each conveyance roller pair shown in FIG. 9, a drive roller driven by a drive source such as a motor is illustrated by a large circle, and a driven roller rotated by a follower is illustrated by a small circle. The driving of the moving roller of each conveyance roller pair is controlled by the control unit 27 (FIGS. 1 and 2), and the sheet is conveyed through the relay unit path 32.

  The relay unit path 32 shown in FIG. 9 has a branch point A at which the transport path branches, a branch point B, and a branch point C, a junction D at which the transport path merges, and an end portion E forming the end of the sheet transport path. And an end F. Further, at the branch point A, the branch point B, and the branch point C, guide flaps (not shown) for distributing the sheet conveyance path are provided.

  Furthermore, the relay unit path 32 includes an introduction path 50 (between the upstream side relay unit 34 and the branch point A), a first branch path 51 (between the branch point A and the branch point B), and a first switchback path. 52 (between the branch point B and the end E), the first merge path 53 (between the branch point B and the merge point D), and the second branch path 54 (between the branch point A and the branch point C) ), The second switchback path 55 (between the branch point C and the end F), the second merge path 56 (between the branch point C and the merge point D), and the derivation path 64 (the merge point D and Between the downstream relay unit 35 and the downstream relay unit 35).

  A first transport roller pair group 57 is provided in the introduction path 50, the first branch path 51, and the second branch path 54. The first switchback path 52 is provided with a second transport roller pair group 58. A third transport roller pair group 59 is provided in the second switchback path 55. A fourth transport roller pair group 60 is provided on the first merging path 53, the second merging path 56, and the upstream side of the sheet transport direction in the lead-out path 64. A fifth transport roller pair group 61, a correction roller pair 62, and a discharge roller pair 63 are provided on the downstream side of the sheet transport direction in the lead-out path 64.

The correction roller pair 62 is a roller pair that corrects the skew of the sheet in the relay unit path 32 in the case where the sheet is skewed with respect to the transport direction. Specifically, the correction of the skew of the sheet is performed by the control unit 27 striking the sheet against the correction roller pair 62 (medium conveyance means) in the stopped state. The skew can be corrected effectively by causing the sheet to abut the correction roller pair 62 in the stopped state at a high speed by increasing the sheet conveyance speed of the fifth conveyance roller pair group 61. The sheet abutted against the correction roller pair 62 and corrected for skew is nipped by the correction roller pair 62 and delivered to the downstream relay unit 35.
The correction roller pair 62 is positioned on the downstream side in the conveyance direction with respect to the fifth conveyance roller pair group 61, and is disposed such that the leading end of the sheet reaches the downstream relay unit 35 during conveyance by the correction roller pair 62. It is done. That is, the correction roller pair 62 is disposed near the downstream relay portion 35.

  The second transport roller pair group 58 and the third transport roller pair group 59 are rotatable in the forward direction or the reverse direction, and the sheet transport direction in the first switchback path 52 and the second switchback path 55. Can be inverted.

  Subsequently, the flow of sheet conveyance in the relay unit path 32 will be described with reference to FIGS. 10 and 11. 10 and 11 are views corresponding to FIG. 9 and for the conveyance system of the first conveyance roller pair group 57 to the fifth conveyance roller pair group 61, the correction roller pair 62, the discharge roller pair 63, etc. The illustration of the components is omitted. Further, in FIGS. 10 and 11, the portion of the relay unit path 32 used for sheet conveyance is indicated by a solid line, and the portion of the relay unit path 32 not used for sheet conveyance is indicated by a broken line. Further, in FIG. 10 and FIG. 11, the arrows in the drawings indicate the sheet conveyance direction, and symbols H1 to H6 are given respectively.

The relay unit path 32 transports the sheet along two paths, a first path 32a (the path shown by a solid line in FIG. 10) shown in FIG. 10 and a second path 32b (a path shown by a solid line in FIG. 11) shown in FIG. be able to.
As shown by the solid line in FIG. 10, the first path 32a through which the sheet is conveyed is the introduction path 50, the first branch path 51, the first switchback path 52, the first merging path 53, and the lead-out path 64. And consists of

  In the first path 32a (FIG. 10), the sheet sent from the upstream relay unit 34 passes the introduction path 50, travels the first branch path 51 in the transport direction H1, and enters the first switchback path 52. . The sheet carried into the first switchback path 52 advances in the direction of conveyance H2, and then the direction of movement of the sheet is reversed (switched back), and advances in the direction of conveyance H3 opposite to the direction of conveyance H2. The first merging path 53 is entered. Subsequently, the sheet advances in the conveyance direction H4 in the first junction path 53 and enters the lead-out path 64, advances in the conveyance direction H5 and the conveyance direction H6 in the lead path 64, and the downstream side relay unit 35 It is carried out toward the receiving unit 41 (FIG. 1).

On the other hand, the second path 32 b indicated by a solid line in FIG. 11 is configured by the introduction path 50, the second branch path 54, the second switchback path 55, the second merging path 56, and the derivation path 64.
In the second path 32 b, the sheet carried in from the upstream side relay unit 34 passes the introduction path 50, advances in the transport direction H 1 in the second branch path 54, and is carried in the second switchback path 55. The sheet carried into the second switchback path 55 advances in the transport direction H2, and then the transport direction of the sheet is reversed (switched back), and advances in the transport direction H3 opposite to the transport direction H2, and the second It is carried into the merging route 56. Subsequently, the sheet advances in the conveyance direction H4 in the second merging path 56, is carried into the lead-out path 64, advances in the conveyance direction H5 and the conveyance direction H6 in the lead-out path 64, and the downstream relay unit 35 Is carried out toward the receiving unit 41 (FIG. 1) of

When recording is continuously performed on a plurality of sheets of paper, for example, the sheet conveyed in from the upstream side relay unit 34 is a guide flap (not shown) provided at the branch point A for the preceding medium on which the recording was performed first. It is guided to the 1st course 32a. Subsequently, the subsequent medium carried from the upstream relay unit 34 is guided to the second path 32 b by a guide flap (not shown) provided at the branch point A.
Then, conveyance of the sheet by the first path 32a and conveyance of the sheet by the second path 32b are alternately repeated.
As described above, since the relay unit path 32 includes the first switchback path 52 and the second switchback path 55 in the second downstream side transport path 30, the sheet is transported for a longer transport distance. It will be

Subsequently, the sheet carried out from the downstream side relay portion 35 of the relay unit 3 is carried into the post-processing unit path 33 from the receiving portion 41 of the post-processing unit 4 shown in FIG. The sheet having entered the post-processing unit path 33 is fed by the conveyance roller pairs 42 and 43 and the leading end reaches the second discharge unit 40. A guide flap 45 is provided in the vicinity of the upstream side of the second discharge unit 40, and is guided by the guide flap 45 and stacked in the post-processing unit 44 with the sheet rear end side in the −Z axial direction side.
When the number of sheets (or one sheet) set in the post-processing unit 44 is stacked, post-processing (cutting, stapling, etc.) is performed. The sheet or sheet bundle after the post-processing is performed is discharged by the discharge roller 46 in the + Y axis direction and placed on the discharge tray 47.

In the first switchback path 52 or the second switchback path 55 of the relay unit path 32, the position of the surface (for example, the first surface) of the sheet in the transport direction is reversed before and after the transport direction of the sheet is switched back. Be done.
For this reason, while the sheet carried in from the upstream side relay portion 34 is conveyed through the first path 32a or the second path 32b, the front and back (positions of the first surface and the second surface) in the conveyance direction are reversed. . Then, the sheet is discharged from the downstream relay unit 35 toward the post-processing unit 4 (FIG. 1) in a state where the front and back with respect to the transport direction is reversed.

  As mentioned above, although the example of the recording unit as a recording device concerning the present invention and the recording system provided with this was explained, the present invention is not limited to the above-mentioned embodiment, but within the scope of the invention described in the claim. It goes without saying that various modifications are possible, which are also included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... recording system, 2 ... recording unit (recording apparatus), 3 ... relay unit, 4 ... post-processing unit, 5 ... printer unit, 6 ... scanner unit, 7 ... paper accommodation cassette, 8 ... first discharge unit, 9 ... Medium placing portion, 10: line head, 11: heat roller pair, 11a: driving roller, 11b: driven roller, 12: straight path, 13: first downstream conveyance path, 14: feeding path, 15: both sides Switchback path for recording, 16: reverse path, 17: feeding roller, 18: separation roller pair, 19: registration roller pair, 20: belt conveyance means, 21: conveyance roller pair, 22: conveyance roller pair, 23: conveyance Roller pair group 24 Transport roller pair 25 Discharging unit 26 Switching unit 27 Control unit 28 Delivery unit 29 Transport roller pair 30 Second downstream transport route 31: recording unit path, 32: relay unit path, 33: post-processing unit path, 34: upstream side relay portion, 35: downstream side relay portion, 36, 37: guide flap, 38: transport roller pair, 40: second Ejecting part 41: Receiving part 42, 43: Conveying roller pair 44: Post-processing part 45: Guide flap 46: Ejecting roller 47: Ejecting tray 50: Introduction path 51: First branch path 52 ... first switchback path, 53 ... first junction path, 54 ... second branch path, 55 ... second switchback path, 56 ... second junction path, 57 ... first transport roller pair group, 58 ... second Transport roller pair group, 59 ... third transport roller pair group, 60 ... fourth transport roller pair group, 61 ... fifth transport roller pair group, 62 ... correction roller pair, 63 ... discharge roller pair, 70 ... Manual feed tray 71: conveyance roller pair 72: discharge unit 73: discharge tray 74: fourth downstream conveyance route 81: first holding unit 82: second holding unit 83: shaft unit 84: Giza roller (Spur), G1, G2 ... branch part

Claims (12)

A recording unit that discharges liquid to a medium to perform recording;
A plurality of downstream transport paths branched at a branch located downstream of the recording unit;
A drying unit for contacting the medium and for drying the medium after recording by heating;
A control unit that controls the operation of the drying unit;
The drying unit is provided in a medium transport path between the recording unit and the branch unit,
The control unit controls the operation of the drying unit according to which one of the plurality of downstream transport paths the medium after being recorded by the recording unit is sent.
A recording device characterized by In the recording apparatus according to claim 1,
The plurality of downstream transport paths include a first downstream transport path and a second downstream transport path having a path length longer than that of the first downstream transport path.
The control unit
When the medium after recording is sent to the first downstream transport path, the drying unit is brought into the first state,
When the medium after recording is sent to the second downstream transport path, the drying unit is set to a second state in which the drying unit is heated more than the first state.
A recording device characterized by In the recording device according to claim 2,
The drying unit includes a roller pair that holds the medium between a first roller and a second roller, and at least one of the first roller and the second roller is heated.
A recording device characterized by In the recording apparatus according to claim 3,
The roller pair is configured to be switchable between a nipping state in which the medium can be nipped by the first roller and the second roller, and a separated state in which the first roller and the second roller are separated. To be
A recording device characterized by In the recording apparatus according to claim 4,
The control unit
The first state of the drying unit is set to the non-heating state in which the roller pair is not heated and the separation state,
The second state of the drying unit is a heating state in which the roller pair is heated and the nipping state.
A recording device characterized by In the recording apparatus according to claim 4,
The control unit
When the roller pair has not reached the target heating state, the roller pair is put into the separated state,
When the roller pair reaches the target heating state, put the roller pair in the nipping state,
A recording device characterized by The recording apparatus according to any one of claims 4 to 6.
In the pinched state of the roller pair, both the first roller and the second roller advance into the medium transport path, and in the spaced state of the roller pair, both the first roller and the second roller are media Withdrawable from the transport path
A recording device characterized by The recording apparatus according to any one of claims 4 to 6.
The first roller is provided on the side of the nearest recording surface of the medium and is movable forward and backward with respect to the medium conveyance path, and is separated from the medium conveyance path in the separated state;
On the side of the nearest recording surface of the medium there is provided a spur which can move back and forth relative to the medium transport path,
In the state where the first roller is separated from the medium conveyance path, the spur is in a state of advancing to the medium conveyance path, and sandwiches the medium with the second roller.
A recording device characterized by A recording unit that discharges liquid to a medium to perform recording;
A plurality of downstream transport paths branched at a branch located downstream of the recording unit;
A drying unit for contacting the medium and for drying the medium after recording by heating;
A control unit that controls the operation of the drying unit;
The plurality of downstream transport paths include a first downstream transport path and a second downstream transport path having a path length longer than that of the first downstream transport path.
The drying unit is not provided in the first downstream transport path, and is provided in the second downstream transport path.
A recording device characterized by The recording apparatus according to any one of claims 1 to 9, wherein the control unit controls the drying unit in accordance with conditions under which the drying unit attempts to dry the medium.
A recording device characterized by A recording unit having a recording unit that discharges liquid onto a medium to perform recording;
A plurality of downstream transport paths branched at a branch located downstream of the recording unit;
An adjacent unit provided adjacent to the recording unit and receiving and transporting the medium from the recording unit;
A drying unit for contacting the medium and for drying the medium after recording by heating;
A control unit that controls the operation of the drying unit;
The drying unit is provided in a medium transport path between the recording unit and the branch unit,
The plurality of downstream transport paths are:
A first downstream transport path connected to a first discharge unit that discharges the medium after recording without transferring it to the adjacent unit;
A second downstream transport path connected to a second discharge unit which is discharged after the medium after recording is transported through an adjacent unit path which is a medium transport path of the adjacent unit;
The control unit controls the operation of the drying unit according to which one of the plurality of downstream transport paths the medium after being recorded by the recording unit is sent.
Recording system characterized by A recording unit having a recording unit that discharges liquid onto a medium to perform recording;
A plurality of downstream transport paths branched at a branch located downstream of the recording unit;
An adjacent unit provided adjacent to the recording unit and receiving and transporting the medium from the recording unit;
And a drying unit for contacting the medium and drying the medium after recording by heating.
The plurality of downstream transport paths are:
A first downstream transport path connected to a first discharge unit that discharges the medium after recording without transferring it to the adjacent unit;
A second downstream transport path connected to a second discharge unit which is discharged after the medium after recording is transported through an adjacent unit path which is a medium transport path of the adjacent unit;
The drying unit is not provided in the first downstream transport path, and is provided in the second downstream transport path.
Recording system characterized by

Images