Inkjet recording apparatus

Abstract

To provide an inkjet recording apparatus capable of suppressing an increase in the width of the apparatus.SOLUTION: An inkjet recording apparatus includes: a recording head; suction means for suctioning liquid from the recording head; a drive source for driving the suction means; and transmission means for transmitting driving force of the drive source to the suction means. The transmission means includes a first foil and a second foil. Therein: the first foil includes a first foil portion and a first abutment portion; the second foil includes a second foil portion and a second abutment portion; the first foil is rated by the driving force; the second foil is rotated when the first abutment portion abuts against the second foil; and the first abutment portion overlaps at least partially the second foil portion in a direction of a rotational axis of the first foil.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] In an inkjet recording device, a recovery operation of the ejection ports is performed to maintain recording quality. A known configuration for this recovery operation is to use a tube pump to perform a suction operation on the ejection ports. Conventionally, a configuration has been known in which an intermediate foil is provided as a delay unit to prevent the tube pump from being driven during operation of the recording medium transport unit (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-058506 Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration in which intermediate foils are provided as described in Patent Document 1, it is necessary to increase the number of intermediate foils in order to increase the amount of delay. However, it was found that an issue arose in that the width of the device increased by the amount of the increased number of intermediate foils.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an inkjet recording apparatus that can suppress an increase in the width of the apparatus. [Means for solving the problem]

[0006] That is, according to the present invention, there is provided an inkjet recording device comprising a recording head, a suction means for sucking liquid from the recording head, a driving source for driving the suction means, and a transmission means for transmitting the driving force of the driving source to the suction means, wherein the transmission means includes a first foil and a second foil, the first foil has a first foil portion and a first abutment portion, the second foil has a second foil portion and a second abutment portion, the first foil rotates due to the driving force, the second foil rotates when the first abutment portion abuts against the second foil, and the first abutment portion overlaps with at least a portion of the second foil portion in the direction of the rotation axis of the first foil. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an inkjet recording apparatus that can suppress an increase in the width of the apparatus. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view schematically illustrating an embodiment of an inkjet recording apparatus of the present invention. [Figure 2] FIG. 2 is a perspective view of a recovery unit of the inkjet recording apparatus of the present invention. [Figure 3] 2 is a cross-sectional view of a conveying path for a recording medium in the inkjet recording apparatus of the present invention. [Figure 4(a)] 2 is a diagram showing a path along which a recording medium passes during transport in the inkjet recording apparatus of the present invention. [Figure 4(b)] 2 is a diagram showing a path along which a recording medium passes during transport in the inkjet recording apparatus of the present invention. [Figure 4(c)] 2 is a diagram showing a path along which a recording medium passes during transport in the inkjet recording apparatus of the present invention. [Figure 5] 1 is a schematic diagram of the periphery of a suction pump unit of an inkjet recording apparatus according to an embodiment of the present invention. [Figure 6] FIG. 3 is a detailed view of a drive input gear of the inkjet recording apparatus of the present invention. [Figure 7]FIG. 3 is a detailed view of a drive transmission wheel of the inkjet recording apparatus of the present invention. [Figure 8] FIG. 2 is a detailed view of the intermediate foil of the inkjet recording device of the present invention. [Figure 9] FIG. 2 is a detailed diagram of a pump driving unit of the inkjet recording apparatus of the present invention. [Figure 10(a)] This is an example of a transmission means of an inkjet recording device. [Figure 10(b)] This is an example of a transmission means of an inkjet recording device. [Figure 10(c)] This is an example of a transmission means of an inkjet recording device. [Figure 11(a)] FIG. 10 is a detailed view of an intermediate foil in another embodiment of the inkjet recording apparatus of the present invention. [Figure 11(b)] FIG. 10 is a detailed view of an intermediate foil in another embodiment of the inkjet recording apparatus of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the components described in the following embodiments are merely examples, and the configuration and various conditions of the device to which the present invention is applied can be modified or changed as appropriate without departing from the spirit of the present invention, and the present invention is not limited to the following embodiments. For example, the dimensions, materials, shapes, and relative positions of the components described in the following embodiments can be modified as appropriate depending on the configuration and various conditions of the device to which the present invention is applied, and unless otherwise specified, the present invention is not limited to the following embodiments.

[0010] (First embodiment) Fig. 1 is a schematic diagram showing an outline of an inkjet recording apparatus according to an embodiment of the present invention. In Fig. 1, when recording an image, the recording medium is fed by a paper feed roller 1, sandwiched between a transport roller 2 and a pinch roller 3 driven by the transport roller 2, and transported in the Y direction by the rotation of the transport roller 2 while being guided and supported on a platen 4. The transport roller 2 is a metal roller processed to form minute irregularities on its surface so as to generate a large frictional force. In this embodiment, a transport roller is used as the transport means, but other configurations may also be used.

[0011] The pinch roller 3 is elastically biased against the conveying roller 2 by a pressing means such as a spring (not shown). The platen 4 supports the back surface of the recording medium so as to maintain a predetermined distance between the ink ejection surface of the recording head 5 and the surface of the recording medium facing it. The recording medium conveyed onto the platen 4 is then sandwiched and conveyed between a discharge roller (not shown) and a spur, which is a rotating body driven by the discharge roller. The discharge roller is a rubber roller with a large coefficient of friction. The spur is elastically biased against the discharge roller by a pressing means such as a spring (not shown). After an image is recorded, the recording medium is ejected from the platen 4 to the outside of the machine by the rotation of the discharge roller.

[0012] The recording head 5 is detachably mounted on a carriage 8, which is driven by a motor or other driving means to move back and forth along guide rails 6 and 7 arranged above and below the carriage 8 in a position that allows it to eject ink toward the recording medium. The direction in which the carriage moves is a direction that intersects with the recording medium transport direction (Y direction) and is called the main scanning direction. In contrast, the recording medium transport direction is called the sub-scanning direction. The recording head 5, particularly in inkjet recording systems, is equipped with a means (e.g., a heating resistor element) that generates thermal energy as the energy used to eject ink, and uses this thermal energy to induce a state change in the ink (film boiling). This method achieves higher density and resolution in recording. Note that the method is not limited to this thermal energy-based method; vibration energy can also be used.

[0013] The print head 5 is provided with multiple nozzle rows for ejecting ink (liquid) of different colors. Multiple independent ink tanks 9 are fixed to the device body, corresponding to the colors of ink ejected from the print head 5. The ink tanks 9 and the print head 5 are connected by joints (not shown) through multiple supply tubes 10 corresponding to the respective ink colors. This makes it possible to independently supply ink of the color stored in each ink tank 9 to each nozzle row of the print head 5 corresponding to each ink color. Furthermore, in the non-printing area, which is within the reciprocating movement range of the print head 5 but outside the range through which the print medium passes when transported, a recovery unit 11, which is a suction means for sucking liquid from the print head, is arranged so as to face the ink ejection surface of the print head 5.

[0014] 2 is a perspective view showing a recovery unit 11 in Example 1 of the present invention. The recovery unit 11 includes a cap 12 that caps the BK (black) and CL (cyan, magenta, yellow) ink ejection port surface (not shown) of the recording head 5, a suction pump 13 that sucks ink from inside the cap 12, a suction tube 14 that connects the cap 12 and the suction pump 13, a waste ink tank 15 that stores waste ink sucked by the suction pump 13, a discharge unit 16 that discharges the waste ink to the waste ink tank 15, and a discharge tube 17 that connects the suction pump 13 and the discharge unit 16.

[0015] FIG. 3 is a cross-sectional view of the recording medium transport path. FIG. 4 is a diagram showing the path of the recording medium when recording on the front and back sides of the recording medium. Here, the front and back sides of the recording medium can be referred to as the first and second sides, respectively. As described above, the recording medium S is transported by the paper feed roller 1 and the transport roller 2, recorded on the platen 4, and then reaches the discharge roller 18. A paper sensor 19 is provided between the paper feed roller 1 and the transport roller 2. If the paper sensor 19 cannot detect the paper even when the paper feed roller 1 rotates, a jam error occurs. FIG. 4(a) shows the path of the recording medium when recording on the front side of the recording medium. In FIG. 4(a), the recording medium S passes through the first transport path P1, which is the area surrounded by the dotted line, in the direction of the arrow (first direction), and the recording head records on the front side (first side) of the recording medium S. After recording on the front side of the recording medium S is completed, the trailing edge of the recording medium S passes the platen 4 and is transported to a position where it is held by the discharge roller 18, as shown in FIG. 4(b). When only recording is performed on the front surface of the recording medium S, the recording medium S is discharged to the outside of the apparatus by the rotation of the discharge roller 18 as described above.

[0016] On the other hand, if recording is to be performed on the back side of the recording medium after recording on the front side, the conveyance roller 2 and discharge roller 18 are reversed and the recording medium S is conveyed in a second direction (-Y direction) different from the first direction, so that the recording medium S is again nipped between the conveyance roller 2 and pinch roller 3. By further reversing the conveyance roller 2, the recording medium S passes through a second conveyance path P2 different from the first conveyance path enclosed by the dotted line in FIG. 4(c) and reaches the paper sensor 19 via the relay roller 20. The conveyance of the recording medium S by the reverse rotation of the conveyance roller 2 and discharge roller 18 continues until the recording medium S reaches the paper sensor 19. The relay roller 20 shares a drive source with the conveyance roller 2, but rotates to convey the recording medium in the Y direction regardless of the rotation direction of the conveyance roller 2. The recording medium S then passes through the conveyance roller 2 and pinch roller 3 again, allowing recording to be performed on the back side of the recording medium S. Therefore, double-sided printing on the recording medium S is possible with a single paper feed operation from the paper feed roller 1.

[0017] FIG. 5 is a schematic diagram of the suction pump and its surroundings, FIG. 6 is a detailed diagram of the drive input gear, FIG. 7 is a detailed diagram of the drive transmission wheel, FIG. 8 is a detailed diagram of the intermediate wheel, and FIG. 9 is a detailed diagram of the pump drive unit. The suction pump 13 performs suction using a tube pump, and has a pump drive direction that generates negative suction pressure (applies negative pressure) within the cap 12 and a pump release direction that opens the cap 12 to the atmosphere. A roller (not shown) inside the pump 13 moves radially to close and open the tube. The drive input gear 21 shares a drive source with the transport roller 2. When the transport roller 2 rotates in the direction in which the recording medium moves in the Y direction, it rotates in the pump release direction, opening the cap 12 to the atmosphere. When the transport roller 2 rotates in the direction in which the recording medium is transported in the -Y direction, it rotates in the pump drive direction, generating negative suction pressure within the cap 12. In other words, when recording is performed on the front side of the recording medium S, the suction pump 13 does not perform suction, but when recording is performed on the back side of the recording medium S, the suction pump 13 performs suction. A drive transmission wheel 22 and five intermediate wheels 23 are arranged in the axial direction (X direction) of the suction pump 13 between the drive input gear 21 and the pump drive unit 24. Hereinafter, the five intermediate wheels 23 will also be referred to as the first wheel to the fifth wheel in the order from the X direction to the -X direction.

[0018] The drive input gear 21, drive transmission wheel 22, intermediate wheel 23, and pump driver 24, which are transmission means for transmitting drive force from a drive source (not shown) to the suction pump 13, are provided with contact portions 21a, 22a, 22b, 23a, and 24a, respectively. As the drive input gear 21 rotates, the contact portions 21a and 22a come into contact with each other, transmitting the drive force (rotational force) to the drive transmission wheel 22. As the drive transmission wheel 22 rotates, the contact portions 22b and 23a come into contact with each other, causing the intermediate wheel 23 (first wheel) to come into contact with the contact portions 23a. Then, as the contact portions 23a of the intermediate wheels 23 come into contact with each other (for example, the first wheel and the second wheel, or the second wheel and the third wheel), the next intermediate wheel 23 comes into contact, and finally, the contact portions 23a and 24a of the intermediate wheel 23 (fifth intermediate wheel) and the pump driver 24 come into contact with each other. Since the pump drive unit 24 rotates in the above-described manner, the drive transmission from the drive input gear 21 to the pump drive unit 24 rotating can be delayed.

[0019] When transporting the recording medium S to the second transport path, the transport roller 2 must rotate in reverse frequently. In this embodiment, as the transport roller 2 continues to rotate in reverse, the suction pump 13 is also driven. Driving the suction pump 13, which is not actually required, during the reverse rotation increases the load on the entire system. This can also shorten the life of the device. Therefore, a mechanism is provided to delay the transmission of drive power to prevent the suction pump 13 from being driven. In this embodiment, a delay of 282 degrees is provided between the drive input gear 21 and the drive transmission wheel 22, 305 degrees between the drive transmission wheel 22 and the intermediate wheel 23, 310 degrees between the intermediate wheels 23, and 319 degrees between the intermediate wheel 23 and the pump drive unit 24. Therefore, by providing five intermediate wheels 23, a total delay of 2,146 degrees is ensured. This configuration prevents the suction pump 13 from rotating in the pump drive direction, even when the recording medium S is reversed from a state where it is held only by the discharge roller 18 to a point where it can be detected by the paper sensor 19. In other words, the time from when the drive source starts the reverse rotation of the transport roller 2 (transport in the second direction) to when the transport roller 2 switches to forward rotation (transport in the first direction) can be made shorter than the time until suction is performed by the suction pump 13. This delay amount is determined by the length of the recording medium in the transport direction mounted in the inkjet recording device, so it may be greater or less than 2146 degrees. In this case, the number of intermediate foils 23 may be increased or decreased. In this embodiment, five intermediate foils are used, but it is preferable to have three or more intermediate foils. In other words, it is preferable to further provide a third foil as a transmission means in addition to the first and second foils.

[0020] To prevent the suction pump 13 from rotating in the pump drive direction, it is necessary to ensure a delay until the conveyance roller 2 reverses its rotation from the state where the recording medium S is nipped by the conveyance roller 2, at least until the nipped state of the conveyance roller 2 is released. Therefore, it is preferable that the delay in the drive of the transmission means be equal to or greater than the length of the recording medium mounted in the inkjet recording device in the conveyance direction. In other words, it is preferable that the time from when the conveyance roller 2 starts its reverse rotation until it switches to forward rotation is longer than the time it takes to convey the largest recording paper that can be used as the recording medium.

[0021] FIG. 10(a) is a schematic diagram of the transmission means, FIG. 10(b) is a detailed diagram of the portion where the foil portion and the abutment portion of the intermediate foil overlap, and FIG. 10(c) is a schematic diagram of the portion corresponding to the transmission means in JP 2011-058506 A. The intermediate foil 23, which is part of the transmission means, is formed by the foil portion 25 and the abutment portion 23a. The intermediate foil 23 may have portions other than the foil portion 25 and the abutment portion 23. The foil portion 25 has a hole that fits onto a shaft so that it can rotate around an axis extending in the X direction, and is disk-shaped. The abutment portion 23a protrudes from the foil portion 25 in the radial direction and the ±X direction. The transmission means shown in FIG. 10(c) is configured so that the abutment portions 23a protruding from the foil portions of the intermediate foils abut against each other. In this configuration, increasing the number of intermediate foils 23 to increase the delay amount increases the device width in the X direction by the width of the contact portion 23a in addition to the width of the foil portion 25. However, in the configuration of this embodiment shown in FIG. 10(a), the contact portion 23a overlaps at least a portion of the foil portion 25 in the X direction. That is, when viewed from the Y direction, the contact portion 23a is arranged to overlap at least a portion of the foil portion (area 23o). This can also be rephrased as saying that the contact portion 23a is arranged to overlap at least a portion of the foil portion 25 in the direction of the rotation axis of the intermediate foil 23. With this configuration, even if the number of intermediate foils 23 is increased to ensure the required delay amount, the device width can be prevented from increasing in the X direction due to the width of the contact portion 23a. Hereinafter, the foil portion and contact portion of the first foil may be referred to as the first foil portion and the first contact portion. In this embodiment, the abutment portions 23a of each intermediate foil 23 (for example, the first abutment portion of the first foil and the second abutment portion of the second foil) abut against each other, but the abutment portions 23a may also be configured such that the first abutment portion of the first foil abuts against the second foil portion of the second foil, or a combination of these may be used.

[0022] The above arrangement reduces the distance between the contact portions 23a of every other intermediate foil 23 (e.g., the first and third foils, the second and fourth foils, etc.). If the contact portions 23a of every other intermediate foil 23 were to contact each other, the delay amount for the intermediate foils between them would not be secured. Therefore, the length of the contact portions 23a in the X direction is set so that every other intermediate foil 23 does not contact each other, but the contact portions 23a of adjacent intermediate foils 23 are securely secured. Furthermore, the contact portions 23a are disposed at the farthest positions from the center in the radial direction. In other words, the contact portions of the intermediate foils 23 are located on the outer side of the foil portion in the direction perpendicular to the rotation axis of the intermediate foil. This arrangement makes it possible to increase the drive delay amount for each intermediate foil 23 while ensuring the strength of the contact portions 23a.

[0023] With the above-described configuration, it is possible to provide an inkjet recording apparatus that can suppress an increase in the width of the apparatus even if the number of intermediate foils increases.

[0024] (Second embodiment) The second embodiment will be described below, but a description of the same configuration as the above-described embodiment will be omitted.

[0025] 11(a) is a detailed view of the intermediate foil, and FIG. 11(b) is a cross-sectional view taken along the line AA. Grooves 27 and groove ends 28 are formed in the foil portion 25 of each intermediate foil 23. As the intermediate foil 23 rotates, the protrusions 26 move within the grooves 27, and the protrusions 26 abut against the groove ends 28, transmitting a rotational force to the next intermediate foil 23. In other words, the rotational force is transmitted between the intermediate foils 23 in the following order: the first abutment portion of the first foil contacts the second foil portion of the second foil, and then the second abutment portion of the second foil contacts the third abutment portion of the third foil. With this configuration, as with the first embodiment, an inkjet recording device can be provided that can suppress an increase in the device width even if the number of intermediate foils in the transmission means increases.

[0026] (Third embodiment) In the third embodiment, the inkjet recording apparatus includes a recording head, a transport unit for transporting the recording medium, and a suction unit for absorbing liquid from the recording head. As in the first embodiment, the transport unit transports the recording medium in a first direction when recording on a first side of the recording medium using the recording head. When recording on a second side, i.e., the reverse side of the previously recorded recording medium, the transport unit transports the recording medium in a second direction different from the first direction. Specifically, when recording on the reverse side of the recording medium after recording on the front side, the recording medium can be transported in the opposite direction, as shown in FIG. 4. The inkjet recording apparatus includes a single drive source for driving the transport unit for transporting the recording medium in the first direction, the transport unit for transporting the recording medium in the second direction, and the suction unit. In other words, these drives can be performed by a single drive source. This drive source may be a motor or any other known drive source. Even with this configuration, using a single drive source can provide an inkjet recording apparatus that can suppress an increase in the device width.

[0027] The disclosure of this embodiment includes the following configurations.

[0028] (Configuration 1) a recording head; a suction means for sucking liquid from the recording head; a drive source that drives the suction means; a transmission unit that transmits a driving force of the driving source to the suction unit, the transmission means includes a first foil and a second foil; the first foil has a first foil portion and a first abutment portion, the second foil has a second foil portion and a second abutment portion, The first wheel is rotated by the driving force, and the first contact portion is brought into contact with the second wheel, thereby rotating the second wheel. An inkjet recording device, wherein the first contact portion overlaps with at least a portion of the second foil portion in the direction of the rotation axis of the first foil.

[0029] (Configuration 2) A conveying means for conveying a recording medium is provided, 2. The inkjet recording apparatus according to configuration 1, wherein the transport means is driven by the drive source.

[0030] (Configuration 3) The inkjet recording apparatus according to configuration 2, wherein the transport means is a roller.

[0031] (Configuration 4) An inkjet recording device according to configuration 2 or 3, wherein the transport means transports the recording medium in a first direction when recording on a first side of the recording medium using the recording head, and transports the recording medium in a second direction different from the first direction when recording on a second side, which is the reverse side of the first side of the recording medium on which recording has been performed.

[0032] (Configuration 5) When the recording medium is conveyed in the first direction by the conveying means, the suction means does not perform suction, 5. The inkjet recording apparatus according to configuration 4, wherein when the recording medium is conveyed in the second direction by the conveying means, suction is performed by the suction means.

[0033] (Configuration 6) An inkjet recording device according to configuration 4 or 5, wherein the time from when the drive source starts to transport the recording medium in the second direction until it switches to transporting in the first direction is longer than the time it takes to transport the largest usable recording paper.

[0034] (Configuration 7) A first conveying path and a second conveying path are provided for conveying the recording medium, the first transport path is a transport path through which the recording medium passes when the recording medium is transported in the first direction by the transport means; 7. The inkjet recording apparatus according to any one of configurations 4 to 6, wherein the second transport path is a transport path through which the recording medium passes when the transport unit transports the recording medium in the second direction.

[0035] (Configuration 8) An inkjet recording device according to any one of configurations 4 to 7, wherein the time from when the driving source starts to transport the recording medium in the second direction until the transport is switched to the first direction is shorter than the time until suction is performed by the suction means.

[0036] (Configuration 9) The inkjet recording device according to any one of Configurations 1 to 8, wherein the second foil rotates when the first contact portion contacts the second foil portion.

[0037] (Configuration 10) The inkjet recording device according to any one of Configurations 1 to 8, wherein the second foil rotates when the first contact portion contacts the second contact portion.

[0038] (Configuration 11) The first contact portion is provided on the outer side of the first foil portion in a direction perpendicular to the rotation axis direction, 11. The inkjet recording apparatus according to configuration 10, wherein the second contact portion is provided on the outside of the second foil portion.

[0039] (Configuration 12) The inkjet recording apparatus according to any one of Configurations 1 to 11, wherein the transfer means comprises three or more intermediate foils.

[0040] (Configuration 13) A recording head, a conveying means for conveying the recording medium; a suction means for absorbing liquid from the recording head, the conveying means conveys the recording medium in a first direction when recording is to be performed on a first surface of the recording medium by the recording head, and conveys the recording medium in a second direction different from the first direction when recording is to be performed on a second surface, which is the reverse side of the first surface of the recording medium on which recording has been performed; Driving the conveying means to convey the recording medium in the first direction; Driving the conveying means to convey the recording medium in the second direction; and driving the suction means. [Explanation of symbols]

[0041] 2 Conveyor rollers 13 Suction pump 21 Drive input gear 22 Drive transmission wheel 23 Intermediate foil 24 Pump drive unit

Claims

1. A recording head; a suction means for sucking liquid from the recording head; a drive source that drives the suction means; a transmission unit that transmits a driving force of the driving source to the suction unit, the transmission means includes a first foil and a second foil; the first foil has a first foil portion and a first abutment portion; the second foil has a second foil portion and a second abutment portion, The first wheel is rotated by the driving force, and the first contact portion is brought into contact with the second wheel, thereby rotating the second wheel. An inkjet recording apparatus, wherein the first contact portion overlaps with at least a portion of the second foil portion in the direction of the rotation axis of the first foil.

2. a conveying means for conveying a recording medium; 2. The ink jet recording apparatus according to claim 1, wherein the transport means is driven by the drive source.

3. 3. The ink jet recording apparatus according to claim 2, wherein the transport means is a roller.

4. The inkjet recording device according to claim 2, wherein the transport means transports the recording medium in a first direction when the recording head performs recording on a first side of the recording medium, and transports the recording medium in a second direction different from the first direction when the recording head performs recording on a second side, which is the reverse side of the first side of the recording medium on which recording has been performed.

5. When the recording medium is conveyed in the first direction by the conveying means, the suction means does not perform suction, 5. The ink jet recording apparatus according to claim 4, wherein when the recording medium is conveyed in the second direction by the conveying means, suction is performed by the suction means.

6. 5. An inkjet recording device according to claim 4, wherein the time from when the drive source starts to transport the recording medium in the second direction to when the drive source switches to transporting in the first direction is longer than the time required to transport the largest usable recording paper.

7. a first conveying path and a second conveying path for conveying the recording medium; the first transport path is a transport path through which the recording medium passes when the recording medium is transported in the first direction by the transport unit; 5. The inkjet recording apparatus according to claim 4, wherein the second transport path is a transport path through which the recording medium passes when the recording medium is transported in the second direction by the transport means.

8. 5. An inkjet recording apparatus according to claim 4, wherein the time from when the driving source starts to transport the recording medium in the second direction until the transport is switched to the first direction is shorter than the time until suction is performed by the suction means.

9. The inkjet recording apparatus according to claim 1 , wherein the second foil rotates when the first contact portion contacts the second foil portion.

10. The inkjet recording apparatus according to claim 1 , wherein the second foil rotates when the first contact portion contacts the second contact portion.

11. The first contact portion is provided on an outer side of the first foil portion in a direction perpendicular to the rotation axis direction, The inkjet recording apparatus according to claim 10 , wherein the second contact portion is provided on the outer side of the second foil portion.

12. 2. The ink jet recording apparatus according to claim 1, wherein the transfer means comprises three or more intermediate foils.

13. A recording head; a conveying means for conveying a recording medium; a suction means for absorbing liquid from the recording head, the conveying means conveys the recording medium in a first direction when recording is to be performed on a first surface of the recording medium by the recording head, and conveys the recording medium in a second direction different from the first direction when recording is to be performed on a second surface, which is the reverse side of the first surface of the recording medium on which recording has been performed; Driving the conveying means to convey the recording medium in the first direction; Driving the conveying means to convey the recording medium in the second direction; and driving the suction means.

Images