Inkjet Printing Device

Abstract

To suppress adhesion of mist to a duct for collecting mist of ink, in an ink jet printer.SOLUTION: An ink jet printer 1 is equipped with a carrying portion 20 that carries a medium S, an ink jet head 10 that discharges ink IK to a medium S, a duct 51 that is disposed on a downstream side of the ink jet head 10 in a carrying direction D of the medium S, and collects mist M of the ink IK, and a rotator 53 (one example of air flow generating means) for generating an air flow A2 toward the upstream side in the carrying direction D, at a downstream side end portion 51a in the carrying direction D in the duct 51.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an inkjet printing device having a duct for collecting an ink mist. [Background technology]

[0002] Conventionally, in inkjet printing devices, mist generated during printing floats within the device and can soil the printing surface of paper and internal components of the device.

[0003] For this reason, there is known an inkjet printing apparatus that uses a mist collection device for collecting the mist present in the vicinity of the printing surface immediately after printing (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-76666 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, when the above-mentioned duct is disposed near the conveying surface to collect the mist, the mist may adhere to the duct and accumulate, causing dripping, or the medium such as paper may come into contact with the suction port of the duct that is contaminated with ink, thereby soiling the printing surface of the medium. In particular, the mist floats due to the inertial force caused by the conveyance of the medium, and therefore often adheres to the inner wall of the duct at the downstream end in the conveying direction of the medium.

[0006] An object of the present invention is to provide an inkjet printing apparatus capable of suppressing adhesion of ink mist to a duct for collecting the ink mist. [Means for solving the problem]

[0007] In one aspect, an inkjet printing device includes a transport unit that transports a medium, an inkjet head that ejects ink onto the medium, a duct that is positioned downstream of the inkjet head in the transport direction of the medium and that collects ink mist, and an airflow generating means at the downstream end of the duct in the transport direction that generates an airflow toward the upstream side in the transport direction. Effect of the Invention

[0008] According to this aspect, it is possible to suppress adhesion of the ink mist to the duct for collecting the ink mist. [Brief description of the drawings]

[0009] [Figure 1] 1 is a front view showing an internal structure of an inkjet printing apparatus according to an embodiment; [Diagram 2] FIG. 2 is a diagram illustrating a control configuration of an inkjet printing apparatus according to an embodiment. [Diagram 3] 2 is a front view showing an internal structure of a mist collection mechanism according to an embodiment. FIG. [Figure 4] 4 is a right side view showing the internal structure of the mist collection mechanism according to the embodiment. FIG. [Diagram 5] 4 is a cross-sectional view illustrating a mist flow and an air flow in one embodiment. FIG. [Figure 6] 13 is a front view showing an internal structure of a mist collection mechanism in a modified example of the embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] An inkjet printing apparatus according to an embodiment of the present invention will now be described with reference to the drawings.

[0011] FIG. 1 is a diagram showing the internal structure of an inkjet printing apparatus 1 according to an embodiment.

[0012] FIG. 2 is a diagram showing a control configuration of the inkjet printing apparatus 1. As shown in FIG.

[0013] In addition, the up-down, left-right, and front-rear directions shown in FIG. 1 and later-described FIGS. 3 to 6 are, for example, vertical directions, and the left-right and front-rear directions are horizontal directions.

[0014] 1, the inkjet printing apparatus 1 includes an inkjet head 10, a transport unit 20, a medium supply unit 30, a medium discharge unit 40, a mist collection mechanism 50, a plurality of transport roller pairs 61, a switching mechanism 62, and a switchback roller pair 63. Furthermore, as shown in FIG. 2, the inkjet printing apparatus 1 includes a control unit 71, a storage unit 72, an operation panel unit 73, and an interface unit 74.

[0015] 1 ejects ink IK (see FIG. 3) onto a medium S, which is, for example, paper. When the inkjet head 10 ejects the ink IK, a floating mist M (see FIG. 3) that does not adhere to the medium S is released.

[0016] It is preferable that a plurality of inkjet heads 10 are arranged as line-head type inkjet heads for each color used for printing, but it is also possible to arrange only a single inkjet head 10. In addition, it is preferable that the inkjet head 10 has a plurality of head modules arranged in a staggered pattern.

[0017] The transport unit 20 has a transport belt 21, a driving roller 22, driven rollers 23 to 25, and a platen 26. The transport unit 20 is disposed opposite the inkjet head 10, and transports the medium S in a transport direction (rightward in FIG. 1). The transport unit 20 may transport the medium S while adsorbing it by, for example, air adsorption or electrostatic adsorption.

[0018] The conveyor belt 21 is, for example, an endless belt stretched around a drive roller 22 and driven rollers 23 to 25, and conveys the medium S while rotating. In a mode in which the medium S is attracted to the conveyor belt 21 by suction of air, the conveyor belt 21 is formed with a plurality of through holes (not shown) for passing air sucked by a suction fan.

[0019] The drive roller 22 is rotated by power transmitted from a motor (actuator), which is an example of a transport drive unit (not shown).

[0020] The driven rollers 23 to 25 rotate together with the conveyor belt 21 as the drive roller 22 rotates.

[0021] The platen 26 is disposed so as to contact the upper bottom surface of the conveyor belt 21 in an area surrounded by the conveyor belt 21. The platen 26 is made of, for example, resin. It is desirable that at least the area of ​​the platen 26 facing the inkjet head 10 is flat. As an example, the platen 26 is placed on a platen support member (not shown). This platen support member is suspended by a wire at both ends in the width direction (front-rear direction) of the medium S sandwiching the conveyor belt 21. The platen 26 moves up and down as the wire is wound up or unwound. The vertical movement of the platen 26 changes the gap between the inkjet head 10 and the conveyor path R1 (the conveyor belt 21, the medium S), but this gap becomes a specified gap when the wire is wound up. However, when the inkjet head 10 itself is disposed so as to be vertically movable, the vertical movement of the inkjet head 10 changes the gap between the inkjet head 10 and the conveyor belt 21 (the conveyor path R1, the medium S). In addition, in a mode in which the medium S is adsorbed to the conveying belt 21 by suction of air, the platen 26 and the platen support member are formed with a plurality of through holes (not shown) for passing air sucked in by the suction fan, similar to the conveying belt 21.

[0022] The medium supply unit 30 includes a supply table 31 , a scraper roller 32 , and a pickup roller 33 .

[0023] On the supply table 31, the medium S before printing is loaded.

[0024] The scraper roller 32 pays out and transports the uppermost medium S among the media S stacked on the supply table 31.

[0025] The pickup roller 33 transports the medium S fed by the scraper roller 32 to the transport path R1.

[0026] The scraper roller 32 and the pickup roller 33 are an example of a feeding member that feeds out the medium S.

[0027] The medium discharge section 40 includes a discharge table 41 and a pair of discharge rollers 42 .

[0028] On the discharge stage 41, the printed medium S discharged from the inside of the inkjet printing apparatus 1 (transport path R1) is stacked.

[0029] The discharge roller pair 42 is a pair of rollers that discharges the medium S from the inside of the inkjet printing apparatus 1 to the discharge tray 41.

[0030] The mist collection mechanism 50 will be described later. The mist collection mechanism 50 collects the mist M that is released when the inkjet head 10 ejects the ink IK and that does not adhere to the medium S and floats there.

[0031] A plurality of pairs of transport rollers 61 are arranged on a transport path R1 inside the inkjet printing apparatus 1, and transport the medium S.

[0032] The switching mechanism 62 switches the transport path of the medium S in the transport path R1 that has passed through the printing unit 10 between the circulating transport path R2 side for re-transporting the medium S to the printing unit 10 when double-sided printing is performed, and the discharge tray 41 side.

[0033] The switchback roller pair 63 is disposed on the circulating transport path R2 and turns the medium S over.

[0034] The control unit 71 has a processor (for example, a CPU (Central Processing Unit)) that functions as an arithmetic processing device that controls the operation of each part of the inkjet printing apparatus 1.

[0035] The memory unit 72 may be, for example, a ROM (Read Only Memory), which is a read-only semiconductor memory in which a specific control program is pre-recorded, a RAM (Random Access Memory), which is a semiconductor memory that can be written to and read at any time and is used as a working memory area as needed when the processor executes various control programs, or a hard disk device.

[0036] The operation panel unit 73 has operation keys for performing various operations, a display unit for displaying various information, and the like, and functions as an example of an input unit and a display unit of the inkjet printing apparatus 1.

[0037] The interface unit 74 transmits and receives various information to and from various devices, such as a personal computer, that are connected wirelessly or by wire via a network. For example, the interface unit 74 can receive a print job including image data from an external device, such as a personal computer.

[0038] FIG. 3 is a front view showing the internal structure of the mist collection mechanism 50. As shown in FIG.

[0039] FIG. 4 is a right side view showing the internal structure of the mist collection mechanism 50. As shown in FIG.

[0040] FIG. 5 is a cross-sectional view for explaining the flow of the mist M and the air currents A1 and A2.

[0041] As shown in FIGS. 3 and 4, the mist collection mechanism 50 includes a duct 51, a suction unit 52, a rotor 53, and a mist collection filter .

[0042] 3, the duct 51 is disposed downstream of the inkjet head 10 in the transport direction D of the medium S, and is a duct for collecting the ink mist M. Note that the duct 51 may be disposed between multiple inkjet heads 10.

[0043] The suction unit 52 sucks air through the duct 51. The suction unit 52 is, for example, a fan. As shown in FIG. 4, the duct 51 is arranged so that the lower end, which is the opening portion, is above the medium S and covers the entire width direction (front-rear direction) of the medium S, so that the volume is large. In addition, the suction unit 52 and the mist collecting filter 54 are preferably arranged outside the printing surface of the medium S (for example, behind the medium S) to prevent dripping caused by mist adhering to and accumulating on the duct 51. The duct 51 is provided so that a part of the suction unit 52 side extends horizontally and a part of the medium S side expands toward the medium S. However, since the suction unit 52 and the mist collecting filter 54 are arranged outside the printing surface of the medium S, the distance from the suction unit 52 and the mist collecting filter 54 along the horizontal part of the duct 51 becomes long, and dripping onto the medium S is less likely to occur.

[0044] 5, the rotor 53 is disposed between the rotor 53 and a downstream end 51a of the duct 51 in the transport direction D, across the flow path of the airflow A2 flowing toward the upstream side in the transport direction D. The duct 51 is formed with a notch 51c in which a part of the lower end on the downstream side including the downstream end 51a is cut out.

[0045] At least a portion of the rotating body 53 is disposed between the downstream end 51a of the duct 51 and the medium S in the thickness direction of the medium S (the up-down direction which is the ink ejection direction of the inkjet head 10). However, the rotating body 53 may be disposed downstream of the downstream end 51a of the duct 51 in the transport direction D. In addition, the rotating body 53 is preferably disposed so as to pass through the notch 51c of the duct 51.

[0046] The rotating body 53 is a driven guide roller that rotates as the medium S is transported by the transport unit 20 described above, but it may also be a drive guide roller that rotates by being driven by a transport drive unit (for example, an actuator such as a motor) to transport the medium together with the transport unit 20. In any case, the rotating body 53 is a guide roller that rotates while in contact with the medium S.

[0047] Here, the rotating body 53 is an example of an airflow generating means that generates an airflow A2 flowing toward the upstream side in the transport direction D at the downstream end 51a of the duct 51 in the transport direction D.

[0048] 4 collects the mist M inside the duct 51. As a result, the mist collection filter 54 functions as a gas-liquid separation portion for the mist M.

[0049] In the mist collection mechanism 50 described above, as shown in FIG. 5, an airflow A1 containing mist M accompanied by inertial force due to the transport of the medium S flows into the duct 51 from the upstream side in the transport direction D by the air suction force of the suction unit 52.

[0050] Furthermore, due to the suction force of the air by the suction unit 52, an airflow A2 flowing toward the upstream side in the conveying direction D (i.e., opposite to the airflow A1) flows into the duct 51 from between the downstream end 51a of the duct 51 and the rotor 53. The rotor 53 is rotating.

[0051] Therefore, the mist M contained in the airflow A1 does not adhere to the rotor 53 due to the airflow (not shown) that accompanies the rotation of the rotor 53, and is pushed back by the airflow A2. As a result, the mist M does not adhere to the inner wall 51b of the downstream end 51a of the duct 51, and is sucked together with the air toward the suction part 52.

[0052] Next, a modified example of this embodiment will be described with reference to Fig. 6. Note that the description will be omitted for matters that overlap with the above description, and differences will be mainly described.

[0053] FIG. 6 is a front view showing the internal structure of a mist collection mechanism 80 in a modified example.

[0054] 6, the mist collection mechanism 80 has a duct 81, a suction unit 82, and rotors 83 and 84. Although not shown, the mist collection mechanism 80 may have the mist collection filter 54 shown in FIG.

[0055] The duct 81, like the above-described duct 51, is disposed downstream of the inkjet head 10 in the transport direction D of the medium S, and is a duct for recovering the mist M of ink.

[0056] Similar to the above-described suction unit 52, the suction unit 82 draws in air through the duct 81. The suction unit 82 is, for example, a fan.

[0057] One of the rotating bodies 83, like the above-mentioned rotating body 53, is disposed between the downstream end of the duct 81 in the transport direction D and the flow path of the airflow A12 heading toward the upstream side in the transport direction D. And like the rotating body 53, the rotating body 83 is an example of an airflow generating means that generates the airflow A12 heading toward the upstream side in the transport direction D at the downstream end of the duct 81 in the transport direction D. Also, at least a part of the rotating body 83 is disposed between the downstream end of the duct 81 and the medium S in the thickness direction of the medium S (the up-down direction which is the ink ejection direction of the inkjet head 10).

[0058] However, the rotating body 83 in this modified example is disposed with a gap (flow path of the airflow A14) between it and the medium S. Therefore, the rotating body 83 is rotated by driving a driving unit (e.g., an actuator such as a motor) not shown. The rotation direction of the rotating body 83 is counterclockwise in FIG. 6 like the rotating body 53, but it may be clockwise instead. Note that the suction unit 82 may suck air with a suction force that generates an airflow A14 toward the upstream side of the transport direction D even when the medium S is transported. Also, the suction force of the suction unit 82 may be set in advance so that the flow speed (average flow speed) of the airflow A14 is faster than the transport speed of the medium S that is the fastest in the settings of the inkjet printing device 1.

[0059] The other rotating body 84 is disposed between the upstream end of the duct 81 in the transport direction D and the medium S, across the flow path of the airflow A13 flowing into the duct 81. At least a part of the rotating body 84 is disposed between the downstream end of the duct 81 and the medium S in the thickness direction of the medium S (the vertical direction that is the ink ejection direction of the inkjet head 10). The rotating body 84 is also disposed between the medium S and the downstream end of the duct 81 and across a gap (the flow path of the airflow A11). Therefore, like the rotating body 83, the rotating body 84 is rotated by driving a driving unit (e.g., an actuator such as a motor) not shown. The rotating body 84 may be a driving guide roller or a driven guide roller that rotates while contacting the medium S. There is also a concern that the mist M may be splashed upward on the upstream side of the transport direction D of the duct 81 due to the rotation of the rotating body 84, and may not flow into the duct 81. In order to prevent this from happening, the rotating body 84 may be separated into a plurality of parts in the width direction (front-back direction) of the medium S and disposed in a comb-like shape. This allows the mist M to easily flow into the duct 81 through the gaps between the multiple separated rotors 84. Note that, compared to when the rotors 84 are drive guide rollers or driven guide rollers that rotate while contacting the medium S as described above, the mist M is more likely to flow into the duct 81 when the rotors 84 are disposed with a gap between them and the medium S and an airflow A11 flowing downstream in the transport direction D of the medium S is generated in this gap.

[0060] In the above-mentioned mist collection mechanism 80, due to the air suction force of the suction section 82, air flows A11, A13 containing mist M accompanied by inertial forces due to the transportation of the medium S flow into the duct 81 from the upstream side of the transport direction D between the upstream end of the duct 81 and the rotating body 84, and between the rotating body 84 and the medium S.

[0061] Furthermore, due to the suction force of the air from the suction unit 82, air currents A12 and A14 flowing toward the upstream side in the transport direction D (i.e., opposite to the air currents A11 and A13) from between the downstream end of the duct 81 and the rotating body 83 and between the rotating body 83 and the medium S into the duct 81. The rotating bodies 83 and 84 are rotating.

[0062] Therefore, the mist M contained in the airflow A11 does not adhere to the rotors 83, 84 due to the airflow (not shown) that accompanies the rotation of the rotors 83, 84, and is pushed back by the airflows A12, A14. As a result, the mist M does not adhere to the inner walls of the downstream end and the upstream end of the duct 81, and is sucked together with the air toward the suction part 82.

[0063] In the present embodiment and modified example described above, the inkjet printing device 1 comprises a transport section 20 that transports the medium S, an inkjet head 10 that ejects ink IK onto the medium S, a duct 51, 81 that is arranged downstream of the inkjet head 10 in the transport direction D of the medium S and for collecting the mist M of the ink IK, and a rotating body 53, 83 that is an example of an airflow generating means that generates airflows A2, A12 toward the upstream side of the transport direction D at the downstream end 51a of the duct 51, 81 in the transport direction D.

[0064] As a result, air currents A2, A12 flowing toward the upstream side in the transport direction D flow into the duct 51, 81 from between the downstream end 51a of the duct 51, 81 and the rotor 53, 83, and the air currents A1, A11, A13 of the mist M floating toward the downstream side in the transport direction D due to the inertial force caused by the transport of the medium M are pushed back by the air currents A2, A12. Therefore, it is possible to suppress the mist M from adhering to the inner wall 51b of the downstream end 51a of the duct 51, 81.

[0065] As described above, according to the present embodiment and the modified example, it is possible to prevent the mist M from adhering to the ducts 51, 81 for recovering the mist M of the ink IK. Therefore, it is possible to prevent dripping caused by the mist M adhering to the inner wall 51b of the downstream end 51a of the ducts 51, 81, and ultimately to prevent the printing surface of the medium M and the inside of the inkjet printing device 1 from becoming soiled.

[0066] In addition, in this embodiment, the airflow generating means is a rotating body 53, 83 arranged between the downstream end 51a of the duct 51, 81 in the transport direction D, across the flow path of the airflows A2, A12 flowing toward the upstream side in the transport direction D.

[0067] As a result, the rotation of the rotors 53, 83 can push back the air currents A1, A11, A13 of the mist M floating toward the downstream side in the transport direction D due to the inertial force caused by the transport of the medium M. Therefore, with a simple configuration, it is possible to prevent the mist M from adhering to the inner wall 51b of the downstream end 51a of the duct 51, 81. In addition, because the rotors 53, 83 rotate, it is also possible to prevent the mist M from adhering to the rotors 53, 83 and the associated dripping from the rotors 53, 83.

[0068] In the present embodiment and the modified example, at least a portion of the rotating body 53, 83 is disposed between the downstream end 51a of the duct 51, 81 and the medium S in the thickness direction of the medium S.

[0069] Therefore, the air currents A2, A12 in the flow paths below the downstream end 51a of the ducts 51, 81 tend to face upstream in the conveying direction D, and can more reliably push back the air currents A1, A11, A13 of the mist M floating toward the conveying direction D. This makes it possible to further suppress adhesion of the mist M to the inner wall 51b of the downstream end 51a of the ducts 51, 81.

[0070] In the present embodiment, the rotating body 53 is a guide roller that rotates while in contact with the medium S.

[0071] Therefore, with a simple configuration using rollers that guide the transport of the medium S, it is possible to suppress adhesion of the mist M to the inner wall 51b of the downstream end 51a of the duct 51, as described above.

[0072] Moreover, in a modified example of this embodiment, the inkjet printing device 1 is provided with a suction unit 82 that sucks in air through a duct 81, the rotating body 83 is positioned with a gap (airflow A14) between it and the medium S, and the suction unit 82 sucks in air with a suction force that generates an airflow A14 that flows upstream in the transport direction D in the gap between the rotating body 83 and the medium S.

[0073] Therefore, the airflow A14 flowing into the duct 81 from between the rotating body 83 and the medium S, together with the airflow A12 flowing into the duct 81 from between the rotating body 83 and the duct 81, can push back the airflows A11, A13 flowing in from between the duct 81 and the medium S accompanied by the inertial force due to the transport of the medium S. This makes it possible to further suppress adhesion of the mist M to the inner wall at the downstream end of the duct 81. Note that, when the suction unit 82 sucks in air with a suction force that makes the flow speed of the airflow A14 faster than the transport speed of the medium S, the airflows A11, A13 flowing in from between the duct 81 and the medium S can be more reliably pushed back.

[0074] In the above-mentioned embodiment and its modified example, the rotor 53, 83 is used as an airflow generating means for generating the airflow A2, A12 toward the upstream side of the conveying direction D at the downstream end 51a of the duct 51, 81 that collects the mist M, but a blowing means (e.g., a fan) may be provided to blow air from the blowing means to generate the airflow A2, A12 toward the upstream side of the conveying direction D at the downstream end 51a of the duct 51, 81 that collects the mist M. It is preferable to take measures to prevent the mist M from adhering to the blowing means. If such a blowing means is provided, it becomes easy to adjust the strength of the airflow A2, A12, and it becomes possible to quickly respond to changes in the conveying speed of the medium S.

[0075] The present invention is not limited to the above-described embodiment as it is, and the components can be modified and embodied without departing from the gist of the invention in the implementation stage. In addition, various inventions can be formed by appropriate combinations of the multiple components disclosed in the above-described embodiment. For example, all the components shown in the embodiment may be appropriately combined. Of course, various modifications and applications are possible without departing from the spirit of the invention. The invention described in the claims at the time of filing of this application is appended below.

[0076] [Appendix 1] A transport unit that transports the medium; an inkjet head that ejects ink onto the medium; a duct disposed downstream of the inkjet head in a transport direction of the medium, the duct being for recovering the ink mist; an airflow generating means for generating an airflow toward an upstream side in the conveying direction at a downstream end of the duct in the conveying direction; An inkjet printing apparatus comprising: [Appendix 2] The airflow generating means is a rotating body disposed between the downstream end of the duct in the transport direction and the downstream end of the duct, across a flow path of the airflow toward the upstream side in the transport direction. 2. The inkjet printing apparatus according to claim 1. [Appendix 3] At least a portion of the rotating body is disposed between the downstream end of the duct and the medium in a thickness direction of the medium. 3. The inkjet printing apparatus according to claim 2. [Appendix 4] The rotating body is a guide roller that rotates while contacting the medium. 4. The inkjet printing apparatus according to claim 2 or 3. [Appendix 5] A suction unit that draws air through the duct, the rotating body is disposed with a gap between it and the medium, The suction unit sucks air with a suction force that generates an airflow toward the upstream side in the transport direction in a gap between the rotating body and the medium. 4. The inkjet printing apparatus according to claim 2 or 3. [Explanation of symbols]

[0077] 1 Inkjet printing device 10 Inkjet head 20 Conveyor section 21 Conveyor belt 22 Drive roller 23~25 Driven roller 26 Platen 30 Media supply section 31 Supply stand 32 Scraper roller 33 Pickup roller 40 Media discharge section 41 Discharge stand 42 Discharge roller pair 50 Mist collection mechanism 51 Duct 51a Downstream end 51b Inner wall 51c Notch 52 Suction part 53 Rotating Body 54 Mist collection filter 61 Transport roller pair 62 Switching Mechanism 63 Switchback roller pair 71 Control Unit 72 Memory section 73 Operation panel section 74 Interface section 80 Mist collection mechanism 81 Duct 82 Suction part 83,84 Rotating body A1, A2, A11~A14 Airflow D Conveying direction IK Ink M Mist R1 Transport path R2 Circulation Path S Media

Claims

1. A transport unit that transports the medium; an inkjet head that ejects ink onto the medium; a duct disposed downstream of the inkjet head in a transport direction of the medium, the duct being for recovering the ink mist; an airflow generating means for generating an airflow toward an upstream side in the conveying direction at a downstream end of the duct in the conveying direction, the airflow generating means is a rotating body disposed between the downstream end of the duct in the transport direction and the downstream end of the duct, across a flow path of the airflow flowing toward the upstream side in the transport direction, At least a portion of the rotating body is disposed between the downstream end of the duct and the medium in a thickness direction of the medium, the duct has a notch formed by cutting out a part of an opening portion on a downstream side in the conveying direction including the downstream end portion, The rotor is disposed so as to pass through the notch of the duct.

1. An inkjet printing apparatus comprising:

2. The rotating body is a guide roller that rotates while contacting the medium.

2. The inkjet printing apparatus according to claim 1.

3. A suction unit that draws air through the duct, the rotating body is disposed with a gap between it and the medium, The suction unit sucks air with a suction force that generates an airflow toward the upstream side in the transport direction in a gap between the rotating body and the medium.

2. The inkjet printing apparatus according to claim 1.

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