Recording apparatus

Abstract

To provide a recording device capable of suppressing deterioration of removal performance of foreign matter adhering to a medium.SOLUTION: The recording apparatus 1 includes the recording unit 15 that performs recording on the medium 21, the resist roller 33 that is disposed upstream of the recording unit 15 in the transport direction Dc, the counter roller 34 that can transport the medium 21 by sandwiching the medium 21 between the resist roller 33 and the counter roller 34, the collection unit 35 that collects foreign substances removed from the medium 21 by the resist roller 33 or the counter roller 34, and the control unit 19, and the control unit 19 changes the inter-shaft distance L between the resist roller 33 and the counter roller 34.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a recording device such as a printer. [Background technology]

[0002] For example, Patent Document 1 discloses a color printer, which is an example of a recording device that records on paper, which is an example of a medium. The color printer includes a paper transport device that transports paper. The paper transport device includes a registration roller, a paper dust removal roller, which is an example of an opposing roller, a link member, and a compression spring. The leading edge of the paper contacts the registration roller and the paper dust removal roller, thereby correcting skew. The link member is pressed by the compression spring, which presses the paper dust removal roller toward the registration roller. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-46996 Summary of the Invention [Problem to be solved by the invention]

[0004] The ease with which metal compression springs deform can change depending on the temperature. Specifically, when the temperature is high, the metal becomes softer. A soft compression spring is more likely to deform, which weakens the force pressing the paper dust removal roller against the registration roller, and this can reduce the paper dust removal performance of the paper dust removal roller. [Means for solving the problem]

[0005] A recording device that solves the above problem includes a recording unit that records on a medium, a registration roller that is positioned upstream of the recording unit in the transport direction, an opposing roller that can transport the medium by sandwiching the medium between the registration roller and the opposing roller, a recovery unit that recovers foreign matter removed from the medium by the registration roller or the opposing roller, and a control unit, wherein the control unit changes the axial distance between the registration roller and the opposing roller. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a schematic diagram of an embodiment of a recording device. [Figure 2] Figure 2 is a table showing the axis distance based on temperature and humidity. [Figure 3] FIG. 3 is a table showing the inter-axis distance based on the recording density. [Figure 4] FIG. 4 is a flowchart showing the media transport routine. DETAILED DESCRIPTION OF THE INVENTION

[0007] [Embodiment] An embodiment of a recording device will be described below with reference to the drawings. The recording device of this embodiment is, for example, an inkjet printer that records by ejecting ink, which is an example of a liquid, onto a medium such as paper. In the drawings, the recording device 11 is placed on a horizontal plane, with the direction of gravity indicated by the Z axis and directions along the horizontal plane indicated by the X and Y axes. The X, Y, and Z axes are perpendicular to one another.

[0008] <Recording device> 1, recording device 11 may include cassette 13, feeding unit 14, recording unit 15, stacker 16, transport unit 17, detection unit 18, and control unit 19. In Fig. 1, a transport path 22 along which transport unit 17 transports medium 21 is indicated by a dashed line. In this embodiment, the direction along transport path 22, in which medium 21 is transported, is also referred to as transport direction Dc.

[0009] The cassette 13 can accommodate a plurality of media 21 stacked on top of each other. The feeding unit 14 feeds the media 21 stored in the cassette 13 one by one onto the transport path 22. The feeding unit 14 may feed the topmost medium 21 of the media 21 stacked in the cassette 13 onto the transport path 22.

[0010] The recording unit 15 performs recording on the medium 21. The recording unit 15 may have a nozzle surface 24. A plurality of nozzles 25 are opened on the nozzle surface 24. The recording unit 15 performs recording on the transported medium 21 by ejecting liquid from the nozzles 25. The recording unit 15 of this embodiment is a line head that performs recording on the transported medium 21 while stationary.

[0011] The stacker 16 receives the medium 21 transported by the transport unit 17. The stacker 16 is capable of stacking a plurality of media 21 on which recording has been performed. The transport unit 17 transports the medium 21 in the transport direction Dc. The transport unit 17 may include one or more pairs of transport rollers 27, a transport belt 28, a pair of pulleys 29, and a reversing mechanism 30. The transport unit 17 may also include a registration roller 33, an opposing roller 34, a recovery unit 35, and a changing unit 36.

[0012] The conveying path 22 may include a supply path 38 , a discharge path 39 , a branch path 40 , and a reversing path 41 . The supply path 38 is a path that connects the cassette 13 and the conveyor belt 28. The supply path 38 is a path upstream of the conveyor belt 28 in the conveyance direction Dc. The supply path 38 is a path along which the medium 21 passes before recording.

[0013] The discharge path 39 is a path that connects the conveyor belt 28 and the stacker 16. The discharge path 39 is a path downstream of the conveyor belt 28 in the conveyance direction Dc. The discharge path 39 is a path through which the recorded medium 21 passes.

[0014] The branch path 40 is a path that branches off from the discharge path 39 . The reversing path 41 is a path that returns the medium 21, which has been recorded on one side, to a position upstream of the recording unit 15 in the conveying direction Dc. The reversing path 41 is a path that connects the branching path 40 and the supplying path 38. The reversing path 41 merges with the supplying path 38 at a position upstream of the registration roller 33 and the opposing roller 34 in the conveying direction Dc. The medium 21 conveyed along the reversing path 41 is reversed so that the first side 21f, which has been previously recorded, faces downward. The medium 21 returned upstream of the recording unit 15 is recorded on with the unrecorded second side 21s facing the recording unit 15. In other words, the recording device 11 may be capable of recording on both sides of the medium 21.

[0015] The transport roller pair 27 includes a roller that contacts one side of the medium 21 and a roller that contacts the other side of the medium 21. One of the two rollers may be a roller that is driven to rotate, and the other may be a roller that is driven to rotate.

[0016] The transport unit 17 may include multiple transport roller pairs 27. The multiple transport roller pairs 27 may be provided along the supply path 38 and the discharge path 39. The multiple transport roller pairs 27 may form the transport path 22 and the discharge path 39. Each transport roller pair 27 rotates with the medium 21 sandwiched between them, thereby transporting the medium 21 along the transport path 22 and the discharge path 39.

[0017] The conveyor belt 28 may be disposed in a position facing the recording unit 15. The conveyor belt 28 is an endless belt. The conveyor belt 28 is stretched over a pair of pulleys 29. The conveyor belt 28 revolves around the pair of pulleys 29 as one pulley 29 rotates. The conveyor belt 28 faces the recording unit 15 across the conveyance path 22. The conveyor belt 28 can support a portion of the medium 21 in a flat state. The conveyor belt 28 conveys the medium 21 by rotating while adsorbing the medium 21.

[0018] The reversing mechanism 30 may include one or more flaps 43 and one or more reversing roller pairs 44. When recording on both the first side 21f and the second side 21s of the medium 21, the reversing mechanism 30 reverses the medium 21 whose first side 21f has been recorded and returns it to the conveyor belt 28.

[0019] The flap 43 can switch the path along which the medium 21 is fed. The reversing mechanism 30 may include multiple reversing roller pairs 44. The multiple reversing roller pairs 44 may be provided on the branch path 40 and the reversing path 41. Each reversing roller pair 44 may constitute the branch path 40 and the reversing path 41. Each reversing roller pair 44 rotates while sandwiching the medium 21, thereby transporting the medium 21 along the branch path 40 and the reversing path 41. At least one of the multiple reversing roller pairs 44 is capable of rotating in both forward and reverse directions. The reversing roller pair 44 switches back the medium 21 that has been recorded on the first side 21f, and sends it to the supply path 38.

[0020] The registration roller 33 is disposed upstream of the recording unit 15 in the transport direction Dc. The leading edge of the medium 21 abuts against the registration roller 33 while the roller is stopped, thereby correcting skew of the medium 21. The registration roller 33 rotates to convey the medium 21 by sandwiching it between itself and the opposing roller 34. The registration roller 33 may be provided on the same side of the transport path 22 as the recording unit 15. The registration roller 33 comes into contact with the surface to be recorded by the recording unit 15. The registration roller 33 may be elastic. The registration roller 33 may be made of rubber, for example, or may have a rubber layer provided on its surface.

[0021] The opposing roller 34 can transport the medium 21 by sandwiching the medium 21 between itself and the resist roller 33. The opposing roller 34 may be provided with a gap between itself and the resist roller 33 that is smaller than the thickness of the medium 21. The opposing roller 34 faces the resist roller 33. The opposing roller 34 may be provided in contact with the resist roller 33. The opposing roller 34 may be provided on the same side of the transport path 22 as the transport belt 28. The opposing roller 34 may have a metal shaft coated with fluororesin. The opposing roller 34 may be charged by friction with the recovery unit 35 to recover foreign matter such as paper dust adhering to the medium 21.

[0022] The recovery unit 35 recovers foreign matter removed from the medium 21 by the resist roller 33 or the opposing roller 34. In this embodiment, the recovery unit 35 recovers foreign matter from the opposing roller 34. The recovery unit 35 may be a brush roller, an adhesive roller, or the like that is rotatable while in contact with the opposing roller 34. The recovery unit 35 may also be a scraper that comes into sliding contact with the rotating opposing roller 34 to scrape off foreign matter.

[0023] The changing unit 36 ​​can change the axial distance L between the registration roller 33 and the opposing roller 34. The axial distance L is the distance from the axial center of the registration roller 33 to the axial center of the opposing roller 34 in a direction perpendicular to the axial direction of the registration roller 33 and the axial direction of the opposing roller 34.

[0024] The changing unit 36 ​​may be configured to include at least one of, for example, a solenoid, a cam, an adjuster, and an air cylinder. The changing unit 36 ​​moves the registration roller 33 and the opposing roller 34 relative to each other. For example, the changing unit 36 ​​may increase the inter-axial distance L by moving the opposing roller 34 in a direction away from the registration roller 33. For example, the changing unit 36 ​​may decrease the inter-axial distance L by moving the opposing roller 34 in a direction toward the registration roller 33.

[0025] <Detection section> The detection unit 18 can detect at least one of temperature and humidity. In this embodiment, the detection unit 18 detects both temperature and humidity. The recording device 11 may be provided with a detection unit 18 that detects temperature and a detection unit 18 that detects humidity separately.

[0026] The detection unit 18 can detect temperatures in a range from a first temperature to a second temperature higher than the first temperature. In this embodiment, a temperature equal to or higher than the first temperature and lower than the reference temperature is also referred to as a low temperature. In this embodiment, a temperature higher than the reference temperature and lower than the second temperature is also referred to as a high temperature. The reference temperature may be a specific temperature such as 20°C. The reference temperature may also be a temperature range such as 17°C to 28°C.

[0027] The temperature detected by the detection unit 18 may be air temperature. The detection unit 18 may also detect the internal temperature, which is the temperature of the air inside the recording device 11. The detection unit 18 may also detect the temperature of a component included in the recording device 11, or may detect the temperature of the medium 21.

[0028] The detection unit 18 can detect humidity in a range from a first humidity to a second humidity higher than the first humidity. In this embodiment, humidity equal to or higher than the first humidity and lower than the reference humidity is also referred to as low humidity. In this embodiment, humidity higher than the reference humidity and lower than the second humidity is also referred to as high humidity. The reference humidity may be a specific humidity, such as 50%, or may be a range of humidity, such as 37% to 57%.

[0029] <Control unit> The control unit 19 comprehensively controls the driving of each mechanism in the recording device 11 and controls various operations executed by the recording device 11.

[0030] The control unit 19 may be configured as a circuit including: α: one or more processors that execute various processes according to a computer program; β: one or more dedicated hardware circuits that execute at least some of the various processes; or γ: a combination thereof. The hardware circuit is, for example, an application-specific integrated circuit. The processor includes a CPU and memory such as RAM and ROM, and the memory stores program code or instructions configured to cause the CPU to execute processes. The memory, i.e., computer-readable medium, includes any readable medium that can be accessed by a general-purpose or dedicated computer.

[0031] The control unit 19 changes the center distance L between the registration roller 33 and the opposing roller 34. The control unit 19 may change the center distance L based on the detection result of the detection unit 18. The control unit 19 may change the center distance L by controlling the driving of the change unit 36. The control unit 19 of this embodiment changes the center distance L based on the temperature and humidity detected by the detection unit 18. In the following description, the reference temperature will also be referred to as the base temperature, and the reference humidity will also be referred to as the base humidity.

[0032] 2, when the temperature and humidity are high temperature and low humidity, base temperature and base humidity, or low temperature and high humidity, the control unit 19 may set the inter-axis distance L to a first reference distance. When the temperature and humidity are low temperature and low humidity, base temperature and low humidity, or low temperature and base humidity, the control unit 19 may set the inter-axis distance L to a first distance that is longer than the first reference distance. When the temperature and humidity are high temperature and high humidity, high temperature and base humidity, or base temperature and high humidity, the control unit 19 may set the inter-axis distance L to a second distance that is shorter than the first reference distance.

[0033] The control unit 19 may change the inter-axis distance L based on either the temperature or the humidity. Control unit 19 may make inter-axis distance L shorter when detection unit 18 detects a second temperature than when detection unit 18 detects a first temperature. For example, control unit 19 may assume that the humidity is a reference humidity, and set inter-axis distance L to a first distance that is longer than the first reference distance when the temperature is low, and set inter-axis distance L to a second distance that is shorter than the first reference distance when the temperature is high.

[0034] Control unit 19 may make inter-axis distance L shorter when detection unit 18 detects a second humidity than when detection unit 18 detects a first humidity. For example, control unit 19 may assume that the temperature is a reference temperature, and set inter-axis distance L to a first distance that is longer than the first reference distance when the humidity is low, and set inter-axis distance L to a second distance that is shorter than the first reference distance when the humidity is high.

[0035] As shown in FIG. 1, when recording on both sides of medium 21, control unit 19 may change the center distance L between when recording on first side 21f and when recording on second side 21s. First side 21f is the front side on which recording is performed first. Second side 21s is the back side on which recording is performed later. When recording on first side 21f, control unit 19 may set center distance L to a first reference distance.

[0036] When recording on the second surface 21s of the medium 21, which has been recorded on the first surface 21f, the control unit 19 may change the axis-to-axis distance L based on the recording density of the first surface 21f. The recording density is a value expressed by setting the average discharge amount, which indicates the amount of liquid discharged per unit area when the recording unit 15 discharges liquid onto the medium 21, as 100%, with the maximum discharge amount being 100%. The recording density may be the ratio of the number of droplets actually discharged to the maximum number of droplets that the recording unit 15 can discharge onto the medium 21. The recording density may be the ratio of the area to be recorded to the area of ​​the recording region of the medium 21. The control unit 19 may acquire the recording density by analyzing the recording data.

[0037] In this embodiment, a print density lower than the reference density is also referred to as a low density. In this embodiment, a print density higher than the reference density is also referred to as a high density. The reference density may be a specific value, such as 40%, or may be a range of values, such as 30% to 60%.

[0038] 3, when the print density is the reference density, the control unit 19 may set the inter-axis distance L to a second reference distance. The second reference distance may be the same as or different from the first reference distance.

[0039] The control unit 19 may shorten the inter-axial distance L when the recording density is a second density higher than the first density, compared to when the recording density is a first density. When the recording density is low, the control unit 19 may set the inter-axial distance L to a third distance longer than the second reference distance. The third distance may be the same as the first distance, or may be a different distance. When the recording density is high, the control unit 19 may set the inter-axial distance L to a fourth distance shorter than the second reference distance. The fourth distance may be the same as the second distance, or may be a different distance.

[0040] Next, a method for transporting the medium 21 will be described with reference to the flowchart shown in Fig. 4. This medium transport routine may be executed when recording starts. 4, in step S101, the control unit 19 determines whether recording is to be performed on only one side of the medium 21 or on both sides of the medium 21. If recording is to be performed on only one side, step S101 becomes YES, and the control unit 19 proceeds to step S102. In step S102, the control unit 19 acquires the temperature and humidity detected by the detection unit 18.

[0041] In step S103, the control unit 19 adjusts the inter-axis distance L and ends the medium conveyance routine. Specifically, the control unit 19 may set the inter-axis distance L by comparing the acquired temperature and humidity with the table shown in FIG.

[0042] In step S101, if double-sided printing is selected, the result of step S101 becomes NO, and the control unit 19 proceeds to step S104. In step S104, the control unit 19 adjusts the inter-axis distance L to the second reference distance. In step S105, the control unit 19 acquires the density of printing on the first side 21f.

[0043] In step S106, the control unit 19 determines whether the rear end of the medium 21, which is being transported with the first surface 21f facing the recording unit 15, has passed the registration roller 33 and the opposing roller 34. If the medium 21 has not passed through, step S106 becomes NO, and the control unit 19 waits.

[0044] When the medium 21 passes the registration roller 33 and the opposing roller 34, step S106 becomes YES, and the control unit 19 proceeds to step S107. In step S107, the center distance L is adjusted, and the medium conveyance routine ends. The control unit 19 may set the center distance L by comparing the acquired recording density of the first side 21f with the table shown in FIG.

[0045] <Operation of this embodiment> The operation of this embodiment will be described. 1, the medium 21 in this embodiment is, for example, paper, which has hygroscopic properties. The medium 21 may deform, such as rippling or curving, by absorbing moisture in the air or liquid ejected from the recording unit 15. Deformation of the medium 21 is likely to become significant when the humidity is high, the temperature is high, or the recording density is high.

[0046] When recording on one side of the medium 21, the control unit 19 causes the medium 21 fed from the cassette 13 to strike at least one of the registration roller 33 and the opposing roller 34, which are in a stopped state. The medium 21 strikes with the first surface 21f facing upward. The front end of the medium 21 bends as it strikes, and the skew of the front end of the medium 21 is corrected so that it is aligned with the registration roller 33.

[0047] The control unit 19 changes the inter-axis distance L based on at least one of the temperature and humidity. The control unit 19 may change the inter-axis distance L before the leading edge of the medium 21 reaches the registration roller 33 and the opposing roller 34. The control unit 19 may change the inter-axis distance L after the leading edge of the medium 21 hits the registration roller 33 and the opposing roller 34 and the skew is corrected.

[0048] With the inter-axis distance L adjusted, the control unit 19 rotates at least one of the registration roller 33 and the opposing roller 34. The registration roller 33 and the opposing roller 34 feed the medium 21 to the conveyor belt 28.

[0049] When the center-to-center distance L is set to a first distance that is longer than the first reference distance, the force with which the registration roller 33 and the opposing roller 34 pinch the medium 21 is weakened. This reduces the load that the registration roller 33, the opposing roller 34, and the conveyor belt 28 impose on the medium 21. When the center-to-center distance L is set to the first distance, for example, in low temperature and low humidity, deformation of the medium 21 is small. Therefore, even if the force with which the registration roller 33 and the opposing roller 34 pinch the medium 21 is weak, the opposing roller 34 can remove foreign matter adhering to the medium 21.

[0050] When the center-to-center distance L is set to a second distance shorter than the first reference distance, the force with which the registration roller 33 and the opposing roller 34 pinch the medium 21 becomes stronger. When the center-to-center distance L is set to the second distance, for example, in high temperature and humidity conditions, the medium 21 is significantly deformed. The registration roller 33 and the opposing roller 34 pinch the medium 21 with strong force, thereby correcting the deformed medium 21. When the center-to-center distance L is shortened, the force with which the registration roller 33 presses the medium 21 against the opposing roller 34 increases. Therefore, the opposing roller 34 is more likely to come into contact with the second surface 21s, making it easier to remove foreign matter adhering to the second surface 21s.

[0051] The conveyor belt 28 attracts the medium 21 and rotates to attract and transport the medium 21. The conveyor belt 28 corrects deformation and attracts the second surface 21s from which foreign matter has been removed by the opposing roller 34. This allows the medium 21 to be held with high suction power. The recording unit 15 records on the first surface 21f of the medium 21 attracted to the conveyor belt 28.

[0052] When recording is performed on one side of the medium 21, the control unit 19 sends the medium 21, on which recording has been performed on the first side 21f, to the discharge path 39 and causes the medium 21 to be discharged to the stacker 16. When recording is to be performed on both sides of the medium 21, the control unit 19 sends the medium 21, on which information has been recorded on the first side 21f, to the branch path 40. That is, the control unit 19 causes the reversing mechanism 30 to reverse the medium 21.

[0053] The control unit 19 causes the inverted medium 21 to strike at least one of the registration roller 33 and the opposing roller 34, which are in a stopped state. The medium 21 strikes with the second surface 21s facing upward. The front end of the medium 21 strikes the registration roller 33, causing the medium 21 to bend, and the front end of the medium 21 to follow the registration roller 33, correcting the skew.

[0054] The medium 21, which has been recorded on the first side 21f, may absorb liquid and become deformed while being turned over. The control unit 19 changes the inter-axial distance L based on the recording density of the first side 21f. The control unit 19 may change the inter-axial distance L before the leading edge of the medium 21 reaches the registration roller 33 and the opposing roller 34. The control unit 19 may also change the inter-axial distance L after the medium 21 hits the registration roller 33 and the opposing roller 34 and skew is corrected.

[0055] With the inter-axis distance L adjusted, the control unit 19 rotates at least one of the registration roller 33 and the opposing roller 34. The registration roller 33 and the opposing roller 34 feed the medium 21 to the conveyor belt 28.

[0056] When the inter-axis distance L is set to a third distance longer than the second reference distance, the force with which the registration roller 33 and the opposing roller 34 sandwich the medium 21 is weakened. As a result, the load applied to the medium 21 by the registration roller 33, the opposing roller 34, and the conveyor belt 28 is reduced.

[0057] When the center distance L is set to a fourth distance shorter than the second reference distance, the force with which the registration roller 33 and the opposing roller 34 pinch the medium 21 increases. The registration roller 33 and the opposing roller 34 can correct deformed medium 21. As the center distance L decreases, the force with which the registration roller 33 presses the medium 21 against the opposing roller 34 increases. The opposing roller 34 is more likely to contact the second side 21s, making it easier to remove foreign matter adhering to the first side 21f. The conveyor belt 28 conveys the medium 21 by adsorbing the first side 21f. The recording unit 15 records on the second side 21s of the medium 21 adsorbed to the conveyor belt 28. The control unit 19 sends the medium 21, with recording on the first side 21f and second side 21s, to the discharge path 39 and discharges it to the stacker 16.

[0058] <Effects of this embodiment> The effects of this embodiment will be described. (1-1) The control unit 19 can change the distance L between the axes of the registration roller 33 and the opposing roller 34. This allows the registration roller 33 and the opposing roller 34 to clamp the medium 21 with an appropriate force. This prevents a decrease in the ability to remove foreign matter adhering to the medium 21.

[0059] (1-2) When at least one of the temperature and humidity is high, the medium 21 may absorb moisture from the air and deform, causing it to ripple. When the medium 21 deforms, the contact area with the registration roller 33 and the opposing roller 34 decreases, which may reduce the performance of the registration roller 33 or the opposing roller 34 in removing foreign matter. In this regard, the control unit 19 changes the center distance L based on at least one of the temperature and humidity. Therefore, the strength with which the registration roller 33 and the opposing roller 34 pinch the medium 21 can be changed taking into account the deformation of the medium 21.

[0060] (1-3) Medium 21 is prone to deformation when at least one of temperature and humidity is high. In this regard, control unit 19 shortens inter-axial distance L when at least one of temperature and humidity is high. In other words, when medium 21 is prone to deformation, the strength with which registration roller 33 and opposing roller 34 pinch medium 21 can be increased.

[0061] (1-4) When recording on the medium 21 by applying a liquid, the medium 21 may absorb the applied liquid and become deformed. That is, when the medium 21, which has been recorded on the first side 21f, is returned to the conveyor belt 28, the registration roller 33 and the opposing roller 34 may pinch the deformed medium 21. In this regard, the control unit 19 changes the center distance L based on the recording density of the first side 21f of the medium 21. Therefore, the strength with which the registration roller 33 and the opposing roller 34 pinch the medium 21 can be changed taking into account the deformation of the medium 21.

[0062] (1-5) The medium 21 is prone to deformation when the recording density is high. In this regard, the control unit 19 shortens the inter-axial distance L when the recording density is high. In other words, when the medium 21 is prone to deformation, the strength with which the registration roller 33 and the opposing roller 34 pinch the medium 21 can be increased.

[0063] [Example of change] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0064] The recording unit 15 may be configured as a serial type that scans the medium 21 . The collection unit 35 may remove foreign matter collected from the medium 21 by the registration rollers 33 .

[0065] The collection unit 35 may remove foreign matter from both the registration roller 33 and the opposing roller 34. The recording apparatus 11 may be provided with a plurality of collection units 35. The resist roller 33 and the opposing roller 34 may be arranged in reverse. That is, the resist roller 33 may be provided on the same side of the transport path 22 as the transport belt 28. The opposing roller 34 may be provided on the same side of the transport path 22 as the recording unit 15.

[0066] The control unit 19 may adjust the center distance L in three or more stages. The control unit 19 may increase the amount of change to the first reference distance when the difference between the detected temperature and the reference temperature is large compared to when the difference between the detected temperature and the reference temperature is small. The control unit 19 may increase the amount of change to the first reference distance when the difference between the detected humidity and the reference humidity is large compared to when the difference between the detected humidity and the reference humidity is small. The control unit 19 may increase the amount of change to the second reference distance when the difference between the recording density of the first surface 21f and the reference density is large compared to when the difference between the recording density of the first surface 21f and the reference temperature is small.

[0067] The control unit 19 may determine the amount of change for the first reference distance as the sum of a first change amount based on temperature and a second change amount for humidity. For example, when the temperature is higher than the reference temperature and the humidity is lower than the reference humidity, the first change amount may be added to the first reference distance and the second change amount may be subtracted from it to determine the inter-axis distance L. When recording on the second surface 21s, the control unit 19 may determine the amount of change for the second reference distance as the sum of the first change amount based on temperature, the second change amount for humidity, and the third change amount for recording density.

[0068] When recording on the second side 21s, the control unit 19 may change the inter-axis distance L based on at least one of the temperature and humidity. The recording device 11 may not have the reversing mechanism 30. In other words, the recording device 11 may be capable of recording on only one side of the medium 21.

[0069] The recording device 11 may not include the conveyor belt 28. For example, the recording device 11 may include a support unit that supports the medium 21 in a flat state. The recording unit 15 may record on the medium 21 supported by the support unit.

[0070] When recording is performed on both sides of the medium 21 and on the first side 21f, the control unit 19 may set the center distance L to the first reference distance. When recording is performed on both sides of the medium 21, and when recording is performed on the first side 21f, the control unit 19 may set the inter-axis distance L based on at least one of the temperature and humidity.

[0071] The detection unit 18 may be provided in an external device separate from the recording device 11. The control unit 19 may obtain at least one of the temperature and humidity from the external device. The recording device 11 may be a liquid ejection device that performs recording by ejecting or discharging a liquid other than ink. The state of the liquid ejected from the liquid ejection device as minute droplets includes granular, teardrop-like, and string-like tails. The liquid referred to here may be any material that can be ejected from the liquid ejection device. For example, the liquid may be any state in which a substance is in its liquid phase, including fluids such as high or low viscosity liquids, sols, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals, and metal melts. The liquid includes not only liquids as a single state of matter, but also particles of functional materials, such as solid pigments and metal particles, dissolved, dispersed, or mixed in a solvent. Representative examples of liquids include inks and liquid crystals, as described in the above embodiments. Here, ink includes various liquid compositions, such as general water-based inks and oil-based inks, as well as gel inks and hot-melt inks. Specific examples of liquid ejection devices include devices that eject liquids containing dispersed or dissolved materials such as electrode materials and color materials used in the manufacture of liquid crystal displays, electroluminescent displays, surface-emitting displays, and color filters. The liquid ejection device may be a device that ejects bioorganic materials used in biochip manufacture, a device used as a precision pipette to eject sample liquids, a textile printing device, a microdispenser, or the like. The liquid ejection device may be a device that injects lubricating oil with pinpoint accuracy onto precision machinery such as watches and cameras, or a device that ejects transparent resin liquids such as ultraviolet-curing resins onto substrates to form micro-hemispherical lenses, optical lenses, etc. used in optical communication elements, etc. The liquid ejection device may also be a device that ejects etching liquids such as acids or alkalis to etch substrates, etc.

[0072] [Definition] The phrase "at least one" as used herein means "one or more" of the desired options. As an example, the phrase "at least one" as used herein means "only one option" or "both of two options" when the number of options is two. As another example, the phrase "at least one" as used herein means "only one option," "any combination of two options," or "any combination of three or more options" when the number of options is three or more.

[0073] [Note] The technical concepts and effects that can be understood from the above-described embodiment and modified examples will be described below.

[0074] (A) The recording device includes a recording unit that records on a medium, a registration roller that is positioned upstream of the recording unit in the transport direction, an opposing roller that can transport the medium by sandwiching the medium between the registration roller and the opposing roller, a recovery unit that recovers foreign matter removed from the medium by the registration roller or the opposing roller, and a control unit, wherein the control unit changes the axial distance between the registration roller and the opposing roller.

[0075] With this configuration, the control unit can change the center distance between the registration roller and the opposing roller, allowing the registration roller and the opposing roller to clamp the medium with an appropriate force, thereby preventing a decrease in the ability to remove foreign matter adhering to the medium.

[0076] (B) The recording device described in (A) may further include a detection unit capable of detecting at least one of temperature and humidity, and the control unit may change the inter-axis distance based on the detection result of the detection unit.

[0077] When at least one of the temperature and humidity is high, the medium may absorb moisture from the air and deform, causing it to ripple. Deformation of the medium reduces the contact area with the registration roller and the opposing roller, potentially reducing the foreign matter removal performance of the registration roller or the opposing roller. In this regard, with this configuration, the control unit changes the center distance based on at least one of the temperature and humidity. Therefore, the strength with which the registration roller and the opposing roller pinch the medium can be changed, taking into account the deformation of the medium.

[0078] In the recording device described in (C) and (B), the detection unit may be capable of detecting at least one of a temperature in a range from a first temperature to a second temperature higher than the first temperature, and a humidity in a range from a first humidity to a second humidity higher than the first humidity, and the control unit may shorten the inter-axis distance when the detection unit detects the second temperature compared to when the detection unit detected the first temperature, and may shorten the inter-axis distance when the detection unit detects the second humidity compared to when the detection unit detected the first humidity.

[0079] The medium is prone to deformation when at least one of the temperature and humidity is high. In this regard, with this configuration, the control unit shortens the inter-axis distance when at least one of the temperature and humidity is high. In other words, when the medium is prone to deformation, the strength with which the registration roller and the opposing roller pinch the medium can be increased.

[0080] (D) The recording device described in (A) to (C) may further include a conveyor belt positioned opposite the recording unit, and an inversion mechanism that, when recording on both the first and second sides of the medium, inverts the medium with the first side recorded and returns it to the conveyor belt, and the control unit may change the inter-axis distance based on the recording density of the first side.

[0081] When recording on a medium by applying a liquid, the medium may absorb the applied liquid and become deformed. That is, when returning a medium with recording on its first side to the conveyor belt, the registration roller and the opposing roller may pinch the deformed medium. In this regard, with this configuration, the control unit changes the center distance based on the recording density of the first side of the medium. Therefore, the strength with which the registration roller and the opposing roller pinch the medium can be changed taking into account the deformation of the medium.

[0082] In the recording device described in (E) and (D), the control unit may make the inter-axis distance shorter when the recording density is a second density higher than the first density than when the recording density is a first density.

[0083] The medium is prone to deformation when the recording density is high. In this regard, with this configuration, the control unit shortens the inter-axis distance when the recording density is high. In other words, when the medium is prone to deformation, the strength with which the registration roller and the opposing roller pinch the medium can be increased. [Explanation of symbols]

[0084] 11...recording device, 13...cassette, 14...feeding section, 15...recording section, 16...stacker, 17...conveying section, 18...detection section, 19...control section, 21...medium, 21f...first surface, 21s...second surface, 22...conveying path, 24...nozzle surface, 25...nozzle, 27...conveying roller pair, 28...conveying belt, 29...pulley, 30...reversing mechanism, 33...registration roller, 34...opposing roller, 35...recovery section, 36...changing section, 38...supply path, 39...discharge path, 40...branching path, 41...reversing path, 43...flap, 44...reversing roller pair, Dc...conveying direction, L...axis distance.

Claims

1. a recording unit that records on the medium; a registration roller disposed upstream of the recording unit in a conveying direction; an opposing roller that can convey the medium by sandwiching the medium between the opposing roller and the registration roller; a collection unit that collects foreign matter removed from the medium by the registration roller or the opposing roller; A control unit; Equipped with The recording apparatus is characterized in that the control unit changes the center distance between the registration roller and the opposing roller.

2. Further comprising a detection unit capable of detecting at least one of temperature and humidity, 2. The recording apparatus according to claim 1, wherein the control unit changes the inter-axis distance based on the detection result of the detection unit.

3. The detection unit a temperature ranging from a first temperature to a second temperature higher than the first temperature; a humidity ranging from a first humidity to a second humidity higher than the first humidity; At least one of The control unit the center distance is made shorter when the detection unit detects the second temperature than when the detection unit detects the first temperature; 3. The recording apparatus according to claim 2, wherein the inter-axis distance is shorter when the detection unit detects the second humidity than when the detection unit detects the first humidity.

4. a conveyor belt disposed at a position facing the recording unit; a reversing mechanism that, when recording on both the first and second sides of the medium, reverses the medium whose first side has been recorded and returns it to the conveyor belt; Furthermore, 4. The recording apparatus according to claim 1, wherein the control unit changes the inter-axis distance based on the recording density of the first surface.

5. 5. The recording apparatus according to claim 4, wherein the control section reduces the inter-axis distance when the recording density is a second density higher than the first density.

Images