Conveying device, liquid ejecting device, image forming device and post-processing device

Abstract

To effectively dry a sheet while suppressing increase of power consumption.SOLUTION: There is provided a conveying device comprising: conveying members 41A, 41B which each have an outer surface contacting a sheet with a liquid sticking thereto and convey the sheet; and an air blowing member 51 which blows hot air generated by heat radiating members 36, 37, 38 to the outer surfaces of the conveying members 41A, 41B.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a conveying device, a liquid ejecting device, an image forming apparatus, and a post-processing device. [Background technology]

[0002] 2. Description of the Related Art As a conveying device for conveying a sheet such as paper, a conveying device including a conveying member such as a roller or a belt is known.

[0003] Patent Document 1 (JP 2017-90007 A) proposes a configuration including a drying device that accelerates drying of ink by transporting a sheet while heating it with a heating transport roller. Summary of the Invention [Problem to be solved by the invention]

[0004] However, the drying device as described above needs to be equipped with a heat source that supplies heat to the heating conveying roller, and therefore, for example, if a dedicated heat source is used to heat the heating conveying roller from within, the power consumption required for the heat source increases, and the efficiency of heat transfer from the inside of the roller to the outer surface is poor, making it difficult to effectively dry the sheet. [Means for solving the problem]

[0005] In order to solve the above problems, the present invention provides a sheet conveying device that conveys a sheet and has an outer surface that contacts a liquid-adhered sheet, and a blower that blows warm air generated from a heat dissipation member to the outer surface of the conveying member, A guide member that guides the sheet in a sheet conveying direction; Equipped with The conveying member is disposed so as to straddle the outer side and the inner side of the sheet conveying path of the guide member, and the air blowing member blows air to an outer surface of the conveying member outside the sheet conveying path, and the air blowing direction of the air blowing member with respect to the conveying member is a direction away from the guide member. The transport device is characterized by the above-mentioned. Effect of the Invention

[0006] According to the present invention, it is possible to effectively dry a sheet while suppressing an increase in power consumption. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic configuration diagram of an image forming apparatus according to an embodiment of the present invention; [Diagram 2] 2 is a side cross-sectional view showing the configuration of a pair of conveying rollers included in the drying device according to the embodiment. FIG. [Diagram 3] FIG. 2 is a cross-sectional view of the image forming apparatus in FIG. 1 taken in a direction perpendicular to the plane of the drawing. [Figure 4] 1 is a side cross-sectional view showing a configuration of a transport device according to a first embodiment of the present invention. [Diagram 5] FIG. 1 is a plan view showing a configuration of a transport device according to a first embodiment of the present invention. [Figure 6] FIG. 6 is a side cross-sectional view showing a configuration of a transport device according to a second embodiment of the present invention. [Figure 7] FIG. 11 is a plan view showing a configuration of a transport device according to a second embodiment of the present invention. [Figure 8] FIG. 11 is a side cross-sectional view showing a configuration of a transport device according to a third embodiment of the present invention. [Figure 9] FIG. 11 is a side cross-sectional view showing the configuration of a transport device according to a fourth embodiment of the present invention. [Figure 10] FIG. 11 is a side cross-sectional view showing the configuration of a transport device according to a fifth embodiment of the present invention. [Figure 11] FIG. 13 is a side cross-sectional view showing the configuration of a transport device according to a sixth embodiment of the present invention. [Figure 12] FIG. 13 is a side cross-sectional view showing the configuration of a transport device according to a seventh embodiment of the present invention. [Figure 13] FIG. 13 is a side cross-sectional view showing the configuration of a transport device according to an eighth embodiment of the present invention. [Figure 14] FIG. 13 is a side cross-sectional view showing the configuration of a transport device according to a ninth embodiment of the present invention. [Figure 15] FIG. 23 is a plan view showing the configuration of a transport device according to a tenth embodiment of the present invention. [Figure 16] FIG. 23 is a plan view showing the configuration of a transport device according to an eleventh embodiment of the present invention. [Figure 17] FIG. 26 is a plan view showing the configuration of a transport device according to a twelfth embodiment of the present invention. [Figure 18] FIG. 23 is a plan view showing the configuration of a transport device according to a thirteenth embodiment of the present invention. [Figure 19] FIG. 23 is a plan view showing the configuration of a transport device according to a thirteenth embodiment of the present invention. [Figure 20] FIG. 23 is a side cross-sectional view showing the configuration of a conveying device according to a fourteenth embodiment of the present invention. [Figure 21] FIG. 13 is a diagram showing a configuration of another image forming apparatus to which the present invention can be applied. [Figure 22] FIG. 13 is a diagram showing the configuration of still another image forming apparatus to which the present invention can be applied. [Figure 23] FIG. 1 is a diagram showing an example in which the present invention is applied to a post-processing device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The present invention will be described below with reference to the accompanying drawings. In each drawing for explaining the present invention, components such as members and components having the same function or shape are given the same reference numerals as far as possible to distinguish them, and the description thereof will be omitted after the first description.

[0009] FIG. 1 is a schematic diagram of an image forming apparatus according to an embodiment of the present invention.

[0010] 1, an image forming apparatus 100 according to this embodiment includes a document transport device 1, an image reading device 2, an image forming section 3, a sheet supply device 4, a cartridge mounting section 5, and a sheet discharge section 7. In addition, a post-processing device 200 is disposed next to the image forming apparatus 100.

[0011] The document transport device 1 is a device that separates documents one by one from a document tray 11 and transports them toward a contact glass 13 of an image reading device 2. The document transport device 1 includes a plurality of transport rollers and the like as a document transport means for transporting the documents.

[0012] The image reading device 2 is a device that reads an image of an original placed on the contact glass 13 or an image of an original passing over the contact glass 13. The image reading device 2 is equipped with an optical scanning unit 12 as an image reading section. The optical scanning unit 12 has a light source that irradiates light onto the original placed on the contact glass 13, and a CCD (charge-coupled device) or the like as an image reading means that reads an image from the light reflected from the original. A contact image sensor (CIS) or the like may also be used as the image reading means.

[0013] The image forming unit 3 has a liquid ejection head 14 as a liquid ejection unit that ejects liquid ink onto a sheet. The liquid ejection head 14 may be a so-called serial type that ejects ink while moving in the main scanning direction (sheet width direction), or may be a so-called line type that ejects ink without moving a plurality of liquid ejection heads aligned in the main scanning direction.

[0014] A plurality of ink cartridges 15Y, 15M, 15C, and 15Bk are removably mounted in the cartridge mounting section 5. Each of the ink cartridges 15Y, 15M, 15C, and 15Bk is filled with ink of a different color, such as yellow, magenta, cyan, and black. The ink in each ink cartridge is supplied to the liquid ejection head 14 by a liquid feed pump.

[0015] The sheet supply device 4 is provided with a plurality of paper feed cassettes 16 as sheet storage units. Each paper feed cassette 16 stores paper P, so-called cut paper, which has been cut to a predetermined size in the paper transport direction (sheet transport direction), such as A4 size or B4 size, as a sheet on which an image is to be formed. Each paper feed cassette 16 is also provided with a paper feed roller 17 as a sheet feeding means and a separation pad 18 as a sheet separating means.

[0016] The post-processing device 200 is a device that performs post-processing such as alignment processing on the sheets sent from the image forming device 100. The post-processing devices included in the post-processing device 200 may be a sheet alignment unit that aligns and discharges multiple sheets, a punching processing unit that punches holes in the sheets, a binding processing unit that binds multiple sheets, or a folding processing unit that folds the sheets in half or in thirds, etc.

[0017] The basic operation of the image forming apparatus according to this embodiment will be described with reference to FIG.

[0018] When an instruction to start a printing operation is given, a sheet P is fed from one of the multiple sheet feed cassettes 16. More specifically, as the sheet feed roller 17 rotates, the topmost sheet P stored in the sheet feed cassette 16 is separated from the other sheets (sheet stack) by the sheet feed roller 17 and the separation pad 18 and sent out.

[0019] When the paper P is transported to a horizontal transport path 20 facing the image forming unit 3, an image is formed on the paper P by the image forming unit 3. In detail, the ejection operation of the liquid ejection head 14 is controlled according to image information of the original read by the image reading device 2 or print information instructed to be printed from a terminal, and ink is ejected onto the image forming surface (upper surface) of the paper P to form an image. Note that the image formed on the paper P may be a meaningful image such as a character or a figure, or may be a pattern that does not have any meaning in itself.

[0020] When double-sided printing is performed, the paper P is guided to the reversing conveying path 21 by conveying the paper P in the opposite direction downstream of the image forming unit 3 in the paper conveying direction. More specifically, after the rear end of the paper P passes through the first path switching means 31 arranged downstream of the image forming unit 3 in the paper conveying direction, the first path switching means 31 switches the conveying path to the reversing conveying path 21 and the paper P is conveyed in the opposite direction. As a result, the paper P is guided to the reversing conveying path 21. Then, as the paper P passes through the reversing conveying path 21, the paper P is conveyed again to the image forming unit 3 in an inverted state, and an image is formed on the back side of the paper P by the same operation of the image forming unit 3 as described above.

[0021] The paper P on which the image has been formed is selectively guided by a second path switching means 32 located downstream of the first path switching means 31 in the paper transport direction to a transport path 22 passing through the drying processing unit 6 described below or a transport path 23 not passing through the drying processing unit 6. When the paper P is guided to the transport path 22 passing through the drying processing unit 6, the drying of the ink on the paper P is promoted in the drying processing unit 6. On the other hand, when the paper P is guided to the transport path 23 not passing through the drying processing unit 6, the paper P is selectively guided by a third path switching means 33 to a transport path 24 leading to the sheet discharge unit 7 or a transport path 25 leading to the post-processing device 200. In addition, the paper P that has passed through the drying processing unit 6 is selectively guided by a fourth path switching means 34 to a transport path 26 leading to the sheet discharge unit 7 or a transport path 27 leading to the post-processing device 200.

[0022] Then, when the paper P is guided to the transport paths 24, 26 leading to the sheet discharge section 7, the paper P is discharged to the sheet discharge section 7. On the other hand, when the paper P is guided to the transport paths 25, 27 leading to the post-processing device 200, the paper P is transported to the post-processing device 200, where the paper P is subjected to a predetermined post-processing and discharged. In this manner, a series of printing operations is completed. Note that in this embodiment, a so-called face-down paper discharge method is adopted in which the paper P is sent to the sheet discharge section 7 or the post-processing device 200 with its image-formed surface (the surface on which ink is attached in the case of single-sided printing) facing down, but the present invention is not limited to this, and a face-up paper discharge method in which the paper P is sent with its image-formed surface facing up may also be used.

[0023] In the image forming apparatus according to this embodiment, in order to transport the paper supplied from the sheet supply device 4, a transport device including a plurality of transport roller pairs is provided.

[0024] As shown in Fig. 2, the conveying device 40 includes a pair of conveying rollers consisting of two conveying rollers 41A and 41B as a conveying member for conveying paper. The pair of conveying rollers 41A and 41B are arranged so as to be in contact with each other. When paper P enters between the conveying rollers 41A and 41B, the paper P is conveyed while being sandwiched between the conveying rollers 41A and 41B which rotate in the direction of the arrow in Fig. 2.

[0025] The conveying device 40 also includes a plurality of guide members 42A, 42B that guide the paper P in a paper conveying direction (sheet conveying direction) Y. The guide members 42A, 42B are disposed at intervals from each other, and a paper conveying path (sheet conveying path) along which the paper P is conveyed is formed between the guide members 42A, 42B.

[0026] Further, holes 43A, 43B in which the transport rollers 41A, 41B are disposed are formed in the guide members 42A, 42B. The transport rollers 41A, 41B are disposed in the holes 43A, 43B, so that they straddle the paper transport path outer side 30 and the paper transport path inner side 29 of the guide members 42A, 42B. Therefore, when the paper P is guided along the guide members 42A, 42B, the paper P is transported while contacting the outer surface of the transport rollers 41A, 41B entering the paper transport path inner side 29. Further, a gap is formed between the outer surface of the transport rollers 41A, 41B and the edge of the hole 43A, 43B so that the transport rollers 41A, 41B and the hole 43A, 43B do not interfere with each other.

[0027] Fig. 3 is a diagram showing the configuration of a warm air supplying means 50 that supplies warm air to the transport rollers 41A, 41B arranged in the drying processing section 6. Fig. 3 is a cross-sectional view of the image forming apparatus 100 in Fig. 1 in a direction perpendicular to the plane of the paper, and in this figure, the left side is the front side (front) of the image forming apparatus 100 and the right side is the back side (rear) of the image forming apparatus.

[0028] As shown in FIG. 3, the warm air supplying means 50 has an air blowing member 51 that blows warm air toward the conveying rollers 41A, 41B arranged in the drying processing unit 6. Specifically, the air blowing member 51 includes a fan 52 as an airflow generating member and a duct 53 as a flow path forming member. The duct 53 is arranged along the axial direction of each of the conveying rollers 41A, 41B. In addition, an air blowing port 53a that blows out the warm air that has passed through the duct 53 is provided in a portion of the duct 53 on the conveying roller 41A, 41B side. The fan 52 is provided at the end of the duct 53 on the upstream side in the air blowing direction. The fan 52 may be provided in the middle of the air blowing path in the duct 53, or may be provided on the downstream side of the duct 53 in the air blowing direction (near the air blowing port 53a).

[0029] 3, the image forming apparatus 100 according to this embodiment includes a front frame 101 and a rear frame 102 as support members for supporting the image forming unit 3, the transport rollers 41A, 41B, etc. The front frame 101 is disposed in a position close to the outer wall at the front of the image forming apparatus main body, and the rear frame 102 is disposed at a position further rearward than the front frame 101. Between the front frame 101 and the rear frame 102, various members constituting the image forming unit 3 (liquid ejection device), the transport rollers 41A, 41B, the duct 53, etc. are disposed, and both ends of these members are supported by the front frame 101 and the rear frame 102.

[0030] In addition, in the rear space 10 between the rear frame 102 and the rear outer wall, there are disposed a drive unit 36 ​​for driving the image forming unit 3 and the transport rollers 41A, 41B, a power supply unit 37 for supplying power to various members in the image forming apparatus, and an electrical equipment unit 38 for controlling the operation of the various members. The drive unit 36, the power supply unit 37, and the electrical equipment unit 38 may be disposed not only in the rear space 10 but also in a space to the side, above, or below the image forming apparatus main body. On the other hand, in the front space 9 partitioned from the rear space 10 by the rear frame 102, there are disposed the image forming unit 3, the transport rollers 41A, 41B, the duct 53, and the like.

[0031] In this manner, in the present embodiment, the drive unit 36, power supply unit 37, and electrical equipment unit 38, which are likely to dissipate heat when energized or driven, are disposed in the rear space 10, and therefore, when these heat dissipating members dissipate heat, the air in the rear space 10 is heated. Then, the warm air supplying means 50 according to the present embodiment supplies the air (warm air) heated in the rear space 10 to the transport rollers 41A, 41B disposed in the drying processing unit 6. Specifically, the warm air in the rear space 10 is sent into the duct 53 by the fan 52, and is blown from the air outlet 53a of the duct 53 toward the transport rollers 41A, 41B.

[0032] In addition, in this embodiment, the rear space 10 is partitioned (isolated) from the front space 9 by the rear frame 102, so that dry air (warm air) in the rear space 10 can be blown to the transport rollers 41A, 41B. That is, in the rear space 10, there is less moisture due to evaporation of ink on the paper compared to the front space 9, so that less humid air (warm air) can be supplied from the rear space 10 to the transport rollers 41A, 41B.

[0033] The detailed configuration and operation of the drying processing unit 6 will be described below with reference to the drawings of each embodiment.

[0034] Fig. 4 and Fig. 5 are diagrams showing the configuration according to the first embodiment of the present invention. Fig. 4 is a side cross-sectional view of the configuration of drying processing section 6 as seen from the axial direction of conveying rollers 41A and 41B, and Fig. 5 is a plan view of drying processing section 6 as seen from below in Fig. 4.

[0035] As shown in FIG. 4, in this embodiment, the duct 53 is disposed on the paper conveying path outer side 30 (lower side) than the lower guide member 42B so as to blow warm air to the lower conveying roller 41B of the pair of conveying rollers 41A, 41B. Therefore, the warm air blown from the duct 53 is blown mainly to the portion of the outer surface of the lower conveying roller 41B that is on the paper conveying path outer side 30. Also, as shown in FIG. 5, the air outlet 53a of the duct 53 is disposed continuously in the axial direction X so as to blow air to the multiple conveying rollers 41B arranged in the axial direction X. Note that the conveying roller 41B is not limited to a case where multiple conveying rollers 41B are provided across the axial direction X of the rotation shaft, and may be a single roller that extends continuously in the axial direction X of the rotation shaft.

[0036] In this embodiment, when the paper P enters between the pair of conveying rollers 41A, 41B arranged in the drying processing unit 6, the paper P is conveyed while being sandwiched between the rotating conveying rollers 41A, 41B. At this time, the liquid-adhered surface (image-forming surface) Pa of the conveyed paper P comes into contact with the lower conveying roller 41B of the pair of conveying rollers 41A, 41B. For this reason, in this embodiment, a duct 53 is arranged so that warm air is blown to the lower conveying roller 41B. That is, when the outer surface (outer peripheral surface) of the lower conveying roller 41B is heated by the blown warm air, when the lower conveying roller 41B comes into contact with the paper P, the heat of the conveying roller 41B is transferred to the liquid-adhered surface Pa of the paper P. In addition, since the outer surface of the lower conveying roller 41B is formed of a material capable of storing heat, it can store the heat of the blown warm air and supply the heat to the liquid-adhered surface Pa of the paper P well. This promotes drying of the liquid-adhered surface Pa. Furthermore, in this embodiment, air with little moisture (warm air) is blown from the rear space 10 to the transport roller 41B, so that the liquid-adhered surface Pa can be dried effectively.

[0037] More specifically, in this embodiment, the warm air blown from the duct 53 mainly warms the portion of the transport roller 41B on the outer side 30 of the paper transport path. The portion of the transport roller 41B where heat has been stored reaches the inner side 29 of the paper transport path by rotation, so that the heat-stored portion of the transport roller 41B comes into contact with the liquid-adhered surface Pa of the paper P, and the drying of the liquid-adhered surface Pa can be promoted. In addition, since the warm air blown onto the transport roller 41B is drier than the air on the inner side 29 of the paper transport path, the humidity of the outer surface of the transport roller 41B can be reduced, and effective drying can be performed. In addition to the lower transport roller 41B, the outer surface of the upper transport roller 41A may also be formed of a material capable of storing heat. Since the heat of the lower transport roller 41B is also transferred to the upper transport roller 41A, the outer surface of the upper transport roller 41A can store heat, so that the upper and lower transport rollers 41A and 41B can effectively warm the paper P from both the front and back sides. This promotes drying even more.

[0038] In addition, in this embodiment, air is blown to the transport roller 41B at the outer side 30 of the paper transport path rather than the guide member 42B, so that the airflow (warm air) is prevented from entering the inner side 29 of the paper transport path. This prevents the paper P from flapping due to the airflow entering the inner side 29 of the paper transport path, and the paper P can be transported stably. In addition, in order to more effectively prevent the paper P from flapping due to the airflow, it is preferable that the gap between the edge of the hole 43B of the guide member 42B and the outer surface of the transport roller 41B is as small as possible. By making this gap small, the amount of airflow entering the inner side 29 of the paper transport path from the hole 43B (gap) can be reduced, so that the flapping of the paper P due to the airflow can be more effectively prevented, and the paper transportability is improved.

[0039] Furthermore, in this embodiment, the location of the air blowing to the transport roller 41B is downstream in the rotation direction of the transport roller 41B on the outer paper transport path outer side 30 (within area Q in FIG. 4), so that more effective drying can be performed. That is, on the outer paper transport path outer side 30, warm air is blown to the portion (within area Q) immediately before the outer surface of the transport roller 41B enters the inner paper transport path inner side 29, so that the heat-accumulating portion of the transport roller 41B can come into contact with the paper P before the temperature drops significantly. This allows heat to be supplied to the paper P efficiently, and the drying effect is also improved.

[0040] The "downstream side in the rotation direction on the outer side of the paper transport path" refers to area Q, which is the downstream half of the outer surface of the lower transport roller 41B when the portion located on the outer side of the paper transport path 30 is divided into two equal parts, the upstream side and the downstream side in the rotation direction, in Fig. 4. However, the portion to which the warm air is blown does not necessarily have to be the entire portion (area Q) on the outer side of the paper transport path 30 downstream in the rotation direction of the transport roller 41B, and may be only a part of it.

[0041] As described above, according to this embodiment, it is possible to promote drying of the liquid-adhered surface Pa by blowing warm air to the transport roller 41B that contacts the liquid-adhered surface Pa of the paper P and supplying heat from the heated transport roller 41B to the liquid-adhered surface Pa of the paper P. Moreover, in this embodiment, heat (warm air) generated within the device from heat dissipation members such as the drive unit 36, power supply unit 37, and electrical equipment unit 38 arranged in the rear space 10 can be effectively used as a heat source for heating the transport roller 41B, so that the drying process of the paper P can be performed with little power consumption.

[0042] Furthermore, in this embodiment, the transport roller 41B is heated not from within but by warm air blown onto its outer surface, so that the portion (outer surface) of the transport roller 41B that comes into contact with the paper P can be efficiently heated. This reduces the amount of heat required for the drying process, and allows for effective drying while suppressing increases in power consumption. Note that the transport roller 41B onto which the warm air is blown is not limited to a transport roller disposed on the lower side of the transport path, but may be a transport roller disposed on the upper side, or may be one of a pair of transport rollers that transport paper in the vertical direction (the same applies to the embodiments described below).

[0043] Thus, according to this embodiment, the outer surface of the conveying roller can be efficiently heated and the heat (warm air) generated in the image forming apparatus can be effectively utilized, so that the increase in power consumption required for the heat source for the drying process can be suppressed and effective drying can be performed. That is, in this embodiment, the heat (warm air) for warming the outer surface of the conveying roller is not the heat generated from a heat generating member such as a heater, but the heat generated from a heat dissipating member that dissipates heat regardless of the original purpose and function of the driving unit 36, the power supply unit 37, the electrical equipment unit 38, etc., is used, so that the power consumption for heat supply can be reduced. In particular, when a dedicated heat source for drying process is not used as in this embodiment, the manufacturing cost of the device can be reduced and the structure can be simplified, improving the reliability of the device.

[0044] Next, an embodiment different from the first embodiment will be described. In the following description, the parts different from the first embodiment will be mainly described, and the other parts are basically the same in configuration, so the description will be omitted as appropriate.

[0045] 6 and 7 are a side cross-sectional view and a plan view showing a configuration according to a second embodiment of the present invention.

[0046] As shown in Fig. 6, in the second embodiment of the present invention, air outlet 53a of duct 53 is arranged so that warm air is blown not only to the downstream side in the rotation direction of lower transport roller 41B on the outside of paper transport path 30 (part in area Q) but also to the upstream side in the rotation direction (part in area R). Here, "upstream side in the rotation direction on the outside of the paper transport path" refers to area R, which is the upstream half of the part of the outer surface of lower transport roller 41B that is disposed on the outside of paper transport path 30 in Fig. 6. Also, "downstream side in the rotation direction on the outside of the paper transport path" is synonymous with the above-mentioned "downstream side in the rotation direction."

[0047] In this embodiment, the duct 53 branches into two downstream of the fan 52 in the air blowing direction, and guides the warm air to the upstream side and downstream side in the rotation direction of the conveyor roller 41B, respectively. The duct 53 is not limited to a configuration in which it branches into two, and may be two ducts having separate flow paths in which separate fans are disposed.

[0048] In this way, in the second embodiment of the present invention, warm air is blown onto both the upstream and downstream portions of the conveying roller 41B in the rotation direction, so that the conveying roller 41B is more effectively heated and the drying performance is improved. In particular, immediately after the conveying roller 41B comes into contact with the paper P, the heat of the outer surface of the conveying roller 41B is taken away by the paper P, so that the temperature of the outer surface tends to drop. However, in this embodiment, by blowing warm air onto the portion on the upstream side of the conveying roller 41B in the rotation direction, the temperature of the portion that tends to drop can be raised, and the heat storage effect can be improved. Note that the portion onto which the warm air is blown does not necessarily have to be the entire portion (region R) on the upstream side of the conveying roller 41B in the rotation direction, but may be only a portion of it.

[0049] FIG. 8 is a side cross-sectional view showing a configuration according to a third embodiment of the present invention.

[0050] As shown in FIG. 8, in the third embodiment of the present invention, the air outlet 53a of the duct 53 is arranged so that the warm air is blown not only to the lower transport roller 41B but also to the upper transport roller 41A. In this case, the outer surfaces (outer peripheral surfaces) of both the upper transport roller 41A and the lower transport roller 41B are heated, so that drying can be promoted from both the front and back sides of the paper P, enabling more effective drying processing. In addition, in this embodiment, the air outlet 53a is located downstream (within the area Q) in the rotation direction of the transport rollers 41A and 41B on the outer paper transport path 30, so that effective drying can be performed. The duct 53 may be configured to branch the warm air sent from one fan 52 into two and guide them, or may be configured to guide the warm air sent from separate fans 52 individually.

[0051] FIG. 9 is a side cross-sectional view showing a configuration according to a fourth embodiment of the present invention.

[0052] 9, in the fourth embodiment of the present invention, warm air is blown to both the upper transport roller 41A and the lower transport roller 41B, and further, warm air is blown to the upstream portion (portion within area R) and downstream portion (portion within area Q) of each transport roller 41A, 41B in the rotation direction of the outer side 30 of the paper transport path. In this case, in addition to being able to dry the paper P from both the front and back sides, the heat storage effect of each transport roller 41A, 41B can be increased, enabling a more effective drying process.

[0053] FIG. 10 is a side cross-sectional view showing a configuration according to a fifth embodiment of the present invention.

[0054] In the third embodiment shown in FIG. 8 described above and the fourth embodiment shown in FIG. 9 described above, since warm air is blown to both the upper conveying roller 41A and the lower conveying roller 41B, the drying performance can be improved. On the other hand, in these embodiments, there is a possibility that a part of the airflow blown onto the upper conveying roller 41A enters the inside 29 of the paper conveyance path through the hole 43A of the guide member 42A. If the surface of the paper P opposite to the liquid adhering surface Pa is strongly pushed by the entering airflow, the liquid adhering surface Pa may come into contact with the lower guide member 42B.

[0055] Therefore, in the fifth embodiment shown in FIG. 10, warm air is blown only to the lower conveying roller 41B so that the airflow does not enter from the hole 43A of the upper guide member 42A. Thereby, it is possible to suppress the paper P from being pushed by the airflow entering from above, and it is possible to reduce the risk of the liquid adhering surface Pa of the paper P coming into contact with the lower guide member 42B. Further, in this embodiment, in order to suppress the entry of the airflow into the inside 29 of the paper conveyance path, the angle θ formed by the blowing direction Z of the warm air blown from the duct 53 and the paper conveyance direction Y is made an acute angle (0° < θ < 90°). Thus, in this embodiment, by setting the angle θ of the blowing direction Z with respect to the paper conveyance direction Y to an acute angle, even if the paper P is thin paper that is likely to flutter, it is possible to suppress the fluttering of the paper P while ensuring the drying performance.

[0056] FIG. 11 is a side cross-sectional view showing a configuration according to a sixth embodiment of the present invention.

[0057] In the sixth embodiment shown in FIG. 11, in addition to the configuration of the fifth embodiment shown in FIG. 10 described above, warm air is also blown to the upper conveying roller 41A. Further, in this embodiment, in order to suppress the fluttering of the paper P due to the airflow entering the inside 29 of the paper conveyance path from above, the wind speed (strength) V1 of the airflow blown from the upper duct 53 is made smaller (weaker) than the wind speed (strength) V2 of the airflow blown from the lower duct 53 (V1 < V2). Thereby, it is possible to avoid the paper P from being pushed by the airflow entering from above and the liquid adhering surface Pa coming into contact with the lower guide member 42B.

[0058] 10, in this embodiment, the angle θ between the blowing direction Z of the warm air blown from each duct 53 and the paper transport direction Y is an acute angle (0°<θ<90°). This further suppresses flapping of the paper P caused by the air current entering the paper transport path inner side 29, and allows the paper P to be transported well while preventing image distortion.

[0059] Furthermore, in this embodiment, the angle θa of the airflow direction Z of the upper duct 53 relative to the paper transport direction Y may be made smaller than the angle θb of the airflow direction Z of the lower duct 53 relative to the paper transport direction Y (θa<θb). In this case, the airflow from the upper duct 53 entering the paper transport path inner side 29 can be further suppressed, so that flapping of the paper P due to the airflow entering from above can be more effectively suppressed.

[0060] FIG. 12 is a side cross-sectional view showing a configuration according to a seventh embodiment of the present invention.

[0061] 12, in the seventh embodiment of the present invention, the blowing direction Z of the warm air blown from each duct 53 is set in a direction away from each guide member 42A, 42B. In this case, the airflow can be more effectively prevented from entering the paper transport path inner side 29 through the holes 43A, 43B of each guide member 42A, 42B, so that flapping of the paper P due to the airflow is even less likely to occur, improving paper transportability.

[0062] FIG. 13 is a side cross-sectional view showing a configuration according to an eighth embodiment of the present invention.

[0063] As shown in Fig. 13, in the eighth embodiment of the present invention, as in the seventh embodiment shown in Fig. 12 described above, the blowing direction Z of the warm air blown from each duct 53 is set in a direction away from each guide member 42A, 42B. Furthermore, in this embodiment, a cover member 54 facing the outer surface of the transport roller 41B is disposed on the outer side 30 of the lower paper transport path. The cover member 54 is disposed at a distance from the outer surface of the transport roller 41B. Therefore, when the warm air is blown from each duct 53, the warm air enters between the cover member 54 and the transport roller 41B, and the cover member 54 can keep the warm air around the transport roller 41B.

[0064] In this manner, in this embodiment, the cover member 54 can keep the warm air around the conveying roller 41B, so that the heat radiation from the outer surface of the conveying roller 41B can be suppressed by the warm air that is retained, and the heat storage state of the conveying roller 41B can be maintained. In particular, when the cover member 54 is arranged from the upstream side (region R) in the rotation direction of the feed roller 41B to the downstream side (region Q) in the rotation direction, as in this embodiment, it is effective in suppressing heat radiation from the conveying roller 41B over a wide range. The shape of the cover member 54 is not limited to an arc shape along the outer surface of the conveying roller 41B as shown in FIG. 13, but may be a curved surface shape other than an arc, or may be a broken line shape including a straight line portion. The cover member 54 may be arranged at a position facing the upper conveying roller 41A. In this case, the warm air is blown onto the upper conveying roller 41A, and the heat storage effect of the cover member 54 is obtained in the same manner as the lower conveying roller 41B.

[0065] FIG. 14 is a side cross-sectional view showing a configuration according to a ninth embodiment of the present invention.

[0066] 14, in the ninth embodiment of the present invention, the upper transport roller 41A and the lower guide member 42B are arranged to be offset from each other in the paper transport direction Y. Furthermore, in this case, the upper transport roller 41A and the lower transport roller 41B are arranged to overlap each other in the range indicated by the symbol J when viewed from the approach direction of the paper P relative to the upper transport roller 41A (horizontal direction in FIG. 14). Therefore, in this embodiment, a transport path is formed along which the paper P is transported while curving from the upstream (upper) transport roller 41A toward the downstream (lower) transport roller 41B.

[0067] In this manner, in this embodiment, a conveying path is formed along which the paper P is conveyed while curving from the upstream conveying roller 41A toward the downstream conveying roller 41B, so that the paper P is conveyed while being in contact with the outer surfaces of the conveying rollers 41A, 41B so as to be partially wrapped around them. This increases the distance over which the paper P contacts the upper conveying roller 41A and the lower conveying roller 41B, so that the amount of heat provided to the paper P from the conveying rollers 41A, 41B increases, and the paper P can be dried more effectively. In this embodiment, the upper conveying roller 41A is disposed upstream of the lower conveying roller 41B in the paper conveying direction Y, but conversely, the lower conveying roller 41B may be disposed upstream of the upper conveying roller 41A in the paper conveying direction Y.

[0068] FIG. 15 is a plan view showing a configuration according to a tenth embodiment of the present invention.

[0069] 15, in the tenth embodiment of the present invention, a plurality of air outlets 53a of the duct 53 are arranged corresponding to a plurality of conveying rollers 41B. That is, each air outlet 53a is arranged to face each conveying roller 41B in the axial direction X of the conveying roller 41B or in the paper width direction (sheet width direction) intersecting with the paper conveying direction A.

[0070] In this way, since the air outlets 53a are arranged only at positions corresponding to the respective transport rollers 41B, the warm air can be efficiently blown to each transport roller 41B, and the amount of warm air blown to each transport roller 41B can be increased. Therefore, in this embodiment, each transport roller 41B can be effectively heated, and the drying performance is improved. In addition, a fan 52 may be arranged for each air outlet 53a so that the warm air is more actively blown to each roller.

[0071] FIG. 16 is a plan view showing a configuration according to an eleventh embodiment of the present invention.

[0072] As shown in FIG. 16, in the eleventh embodiment of the present invention, the amount of warm air blown out from each air outlet 53a is made different between the outside and inside of the axial direction X (paper width direction) of the conveying roller 41B. The amount of air can be adjusted by making the opening area of ​​the air outlet 53a different. In this case, the amount of air at each air outlet 53a arranged at both ends in the axial direction X is made larger than the amount of air at each other (inner) air outlet 53a. This increases the amount of heat supplied to each of the conveying rollers 41B at both ends, which are easy to dissipate heat, and therefore the temperature difference between each of the conveying rollers 41B at both ends and each of the other (inner) conveying rollers 41B can be reduced. Therefore, according to this embodiment, it is possible to reduce uneven drying across the paper width direction. The air volume may be adjusted by varying the opening area of ​​the target air outlet 53a, by varying the distribution rate of the airflow guided to the target air outlet 53a, or by varying the wind speed (rotation speed) of the fan 52 provided for each air outlet 53a.

[0073] FIG. 17 is a plan view showing a configuration according to a twelfth embodiment of the present invention.

[0074] As shown in Fig. 17, in the twelfth embodiment of the present invention, the air volume at each air outlet 53a is gradually increased from the center (inner side) to both ends (outer side) in the axial direction X (paper width direction) of the conveying roller 41B. By varying the air volume for each air outlet 53a in this way, the amount of warm air (air volume) sent to each conveying roller 41B can be finely adjusted, and uneven drying across the paper width direction can be more effectively reduced. In addition, the adjustment of the air volume for each air outlet 53a may be performed by varying the opening area of ​​each air outlet 53a, or by varying the distribution rate of the airflow guided to each air outlet 53a or by varying the output (rotation speed) of the fan 52 provided for each air outlet 53a.

[0075] 18 and 19 are plan views showing a configuration according to a thirteenth embodiment of the present invention.

[0076] 18, in the thirteenth embodiment of the present invention, the opening area of ​​each air outlet 53a can be changed by a control unit 55 provided in the image forming apparatus main body, etc. The control unit 55 controls the rotation speed of each transport roller, which determines the paper transport speed, as well as the liquid ejection head 14, which determines the amount of ink ejected onto the paper.

[0077] For example, when the rotation speed of the transport roller is fast, i.e., when the paper transport speed is fast, the number of sheets passing through the drying processing unit 6 per unit time increases, and the speed at which heat is removed from the transport roller as the sheets pass through increases. Therefore, when the rotation speed of the transport roller is fast, there is a risk of a significant drop in temperature of the transport roller in the drying processing unit 6. Also, when a large amount of ink is discharged onto the paper, a large amount of thermal energy is required, and there is a risk of a significant drop in temperature of the transport roller as the sheets pass through.

[0078] Therefore, in this embodiment, when the rotation speed of the transport roller is fast or the amount of ink discharged to the paper is large (as in FIG. 19), the wind speed V2 of the warm air blown from each air outlet 53a is made faster than the wind speed V1 when the rotation speed of the transport roller is slow or the amount of ink discharged to the paper is small (as in FIG. 18). That is, based on the information (roller rotation speed) of the roller drive unit 56 that rotates the transport roller or the amount of ink discharged from the liquid discharge head 14, the control unit 55 increases the wind speed by reducing the opening area of ​​each air outlet 53a. This increases the speed at which heat is supplied to the transport roller 41B, and suppresses the temperature drop of the transport roller 41B due to the paper passing. In addition, the surface temperature deviation of the transport roller 41B in the roller rotation direction (paper conveying direction Y) due to the paper passing can also be reduced, so that the drying unevenness across the paper conveying direction Y can also be reduced. In addition to increasing the air speed, the amount of warm air blown from the air outlet 53a may be increased so that the area over which the warm air is blown onto the transport roller 41B is increased. In this case, the amount of heat supplied to the transport roller 41B can be increased, and the temperature drop of the transport roller 41B caused by the passage of the paper can be suppressed. The air speed or amount of air may be changed by changing the opening area of ​​each air outlet 53a or by changing the output (rotation speed) of the fan 52 provided for each air outlet 53a.

[0079] In each of the embodiments shown in Figures 15 to 19 described above, an example has been described in which warm air is blown onto the lower conveying roller 41B of the pair of conveying rollers 41A, 41B. However, in these embodiments, warm air may also be blown onto the upper conveying roller 41A in a similar manner.

[0080] FIG. 20 is a side cross-sectional view showing a configuration according to a fourteenth embodiment of the present invention.

[0081] As shown in Fig. 20, in the fourteenth embodiment of the present invention, an endless conveyor belt 44 is used as a conveyor member for conveying paper P, instead of one of the conveyor rollers. The conveyor belt 44 is supported by being stretched around two support rollers 45, 46. A conveyor roller 47, which is another conveyor member, is pressed against the conveyor belt 44. The conveyor roller 47 is pressed toward the inside of the conveyor belt 44 (inside a common tangent line M that contacts the outer circumferential surfaces of the support rollers 45, 46) by a pressure means such as a spring or a cam, so that a curved portion 44a that curves along the outer circumferential surface of the conveyor roller 47 is formed in the conveyor belt 44.

[0082] In the conveying device configured in this manner, when either the conveying roller 47 or the support rollers 45, 46 are driven to rotate, the conveying belt 44 is rotated and the paper P is conveyed. In this embodiment, warm air from inside the image forming apparatus is guided by the duct 53 and blown toward the outer surface of the conveying belt 44 from the air outlet 53a of the duct 53. This warms the outer surface of the conveying belt 44. Then, when the paper P is conveyed, heat is supplied to the paper P from the heated conveying belt 44, accelerating the drying of the liquid-adhering surface Pa of the paper P.

[0083] In addition, in the present embodiment, by using the conveyor belt 44 as the conveyor member, the contact time of the paper P with the heated conveyor member (conveyor belt 44) can be secured longer compared to the above-mentioned embodiments using the pair of conveyor rollers 41A, 41B. Therefore, in the present embodiment, the amount of heat supplied to the paper P can be increased, and the drying performance can be improved. In the present embodiment, the warm air blown from the duct 53 is not limited to being blown onto the outer surface of the conveyor belt 44, but may also be blown onto the outer surface of the conveyor roller 47.

[0084] Although the embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment, and various modifications are possible without departing from the gist of the invention.

[0085] In the above-described embodiment, an example has been described in which heat generated from each of the heat dissipation members, namely the drive unit 36, the power supply unit 37, and the electrical equipment unit 38, arranged in the rear space 10, is supplied to the drying processing unit 6. However, the heat used in the drying process is not limited to heat generated from these heat dissipation members, and may be heat generated from other heat dissipation members.

[0086] Furthermore, the transport device according to the present invention is not limited to a transport device that transports cut paper as in the above-described embodiment, but may also be applied to a transport device that pays out and transports long rolled paper.

[0087] Furthermore, the image forming apparatus to which the present invention is applied is not limited to the image forming apparatus as shown in Fig. 1. The present invention is also applicable to, for example, an image forming apparatus as shown in Fig. 21 or Fig. 22.

[0088] The configuration of other image forming apparatuses to which the present invention can be applied will be described below. Note that in each image forming apparatus, the description will be mainly on the parts that are different from the above-mentioned embodiment, and the other parts are the same as the above-mentioned embodiment, so the description will be omitted.

[0089] The image forming apparatus 100 shown in Fig. 21 includes, similarly to the above-described embodiment, an original transport device 1, an image reading device 2, an image forming section 3, a sheet supply device 4, a cartridge mounting section 5, a drying processing section 6, and a sheet discharge section 7, and further includes a manual sheet supply device 8. However, unlike the embodiment shown in Fig. 1, the image forming section 3 shown in Fig. 21 is disposed so as to face a transport path 80 along which paper P is transported obliquely with respect to the horizontal direction.

[0090] The manual sheet feeder 8 has a manual tray 61 as a placement section for placing paper, and a paper feed roller 62 as a feeding means for feeding paper from the manual tray 61. The manual tray 61 is attached to the image forming apparatus main body so as to be openable (swingable). When the manual tray 61 is in the open state (the state shown in FIG. 21), paper can be placed on the manual tray 61 and fed.

[0091] 21, when an instruction to start a printing operation is given, paper P is supplied from the sheet supply device 4 or the manual sheet supply device 8, and the paper P is transported to the image forming unit 3. Then, when the paper P is transported to the image forming unit 3, ink is ejected from the liquid ejection head 14 onto the paper P to form an image.

[0092] When performing double-sided printing, after the paper P passes through the image forming unit 3, the paper P is transported in the opposite direction, and the first path switching means 71 guides the paper P to the reversing transport path 81. By passing through the reversing transport path 81, the paper P is transported again to the image forming unit 3 in an inverted state, and an image is formed on the back side of the paper P.

[0093] The paper P with images formed on one or both sides is transported to the drying processing section 6, where the ink on the paper P is dried. The paper P that has passed through the drying processing section 6 is selectively guided by the second path switching means 72 to either the transport path 82 leading to the upper sheet discharge section 7 or the transport path 83 leading to the lower sheet discharge section 7. When the paper P is guided to the transport path 82 leading to the upper sheet discharge section 7, the paper P is discharged to the upper sheet discharge section 7. On the other hand, when the paper P is guided to the transport path 83 leading to the lower sheet discharge section 7, the paper P is further selectively guided by the third path switching means 73 to either the transport path 84 leading to the lower sheet discharge section 7 or the transport path 85 leading to the post-processing device 200.

[0094] When the paper P is guided to the conveying path 84 toward the lower sheet discharge section 7, the paper P is discharged to the lower sheet discharge section 7. On the other hand, when the paper P is guided to the conveying path 85 toward the post-processing device 200, the paper P is conveyed to the post-processing device 200, where post-processing is performed on the paper P.

[0095] 22 includes, similarly to the image forming apparatus 100 shown in Fig. 21, a document transport device 1, an image reading device 2, an image forming section 3, a sheet supply device 4, a cartridge mounting section 5, a drying processing section 6, a sheet discharge section 7, and a manual sheet supply device 8. In this case, the image forming section 3 is disposed so as to face a transport path 86 along which paper P is transported horizontally, similarly to the embodiment shown in Fig. 1.

[0096] 22, when an instruction to start a printing operation is given, paper P is supplied from the sheet supply device 4 or the manual sheet supply device 8, and the paper P is transported to the image forming unit 3. Then, when the paper P is transported to the image forming unit 3, ink is ejected from the liquid ejection head 14 onto the paper P to form an image.

[0097] When performing double-sided printing, after the paper P passes through the image forming unit 3, the paper P is transported in the opposite direction, and the first path switching means 74 guides the paper P to the reversing transport path 87. By passing through the reversing transport path 87, the paper P is transported again to the image forming unit 3 in an inverted state, and an image is formed on the back side of the paper P.

[0098] The paper P with images formed on one or both sides is selectively guided by the second path switching means 75 to either a conveying path 88 leading to the drying processing unit 6 or a conveying path 89 leading to the post-processing device 200. When the paper P is guided to the conveying path 88 leading to the drying processing unit 6, the ink on the paper P is dried by the drying processing unit 6. The paper P that has passed through the drying processing unit 6 is discharged to the sheet discharge unit 7. On the other hand, when the paper P is guided to the conveying path 89 leading to the post-processing device 200, the paper P is transported to the post-processing device 200, where post-processing is performed on the paper P.

[0099] By applying the present invention to the image forming apparatus 100 shown in Fig. 21 or 22, the same effects as those described above can be obtained. That is, by supplying warm air generated within the image forming apparatus to the outer surfaces of the transport members such as the transport rollers arranged in the drying processing unit 6, the paper can be effectively dried while suppressing an increase in power consumption.

[0100] The present invention is also applicable to a post-processing device that performs post-processing on a sheet having liquid attached thereto.

[0101] FIG. 23 shows an example of a post-processing device to which the present invention can be applied.

[0102] The post-processing device 400 shown in FIG. 23 includes a drying processing section 6 and a post-processing section 401 that performs post-processing on the sheet that has passed through the drying processing section 6. In this post-processing device 400, when a sheet is conveyed from the image forming device 100, the sheet is heated by the drying processing section 6 and then placed on a loading tray 403 of the post-processing section 401. At this time, if the sheet is placed face-up (image forming surface faces upward), it is preferable to make the image formation order reverse (form the image from the following page). In addition, the sheet P placed on the loading tray 403 is conveyed in the reverse direction by the conveying rollers 402 provided in the post-processing section 401. As a result, the rear end of the sheet P hits the rear end regulating section 403a of the loading tray 403, and the rear end position of the sheet P is aligned. In addition, the conveying rollers 402 are configured to be movable from a position where they can contact the sheet P to a retreat position where they do not contact the sheet P so as not to interfere with the sheet discharge to the loading tray 403. Then, with the rear end position of the paper P aligned, post-processing such as stapling or punching is performed on the paper P. Thereafter, the conveying rollers 402 rotate in the reverse direction, and the paper P on the loading tray 403 is discharged to the outside of the post-processing device 400.

[0103] By applying the configuration according to the present invention to the drying processing unit 6 included in such post-processing device 400, it is possible to effectively dry the paper while suppressing an increase in power consumption.

[0104] Furthermore, the transport device according to the present invention is not limited to a transport device mounted on an inkjet image forming apparatus that ejects ink to form an image, or a transport device mounted on a post-processing apparatus that performs post-processing on paper onto which ink has been ejected. The transport device according to the present invention may be, for example, a transport device mounted on a liquid ejection apparatus that ejects a treatment liquid onto the surface of paper for the purpose of modifying the surface of the paper. In other words, the liquid ejection apparatus according to the present invention includes not only an image forming apparatus that ejects ink to form an image, but also an apparatus that ejects liquid that does not form an image. The transport device according to the present invention is also effective when applied for the purpose of drying liquid (e.g., condensation) that is generated as a side effect in an electrophotographic image forming apparatus.

[0105] In the present invention, the sheet onto which the liquid adheres may be any sheet onto which the liquid can at least temporarily adhere, and to which the liquid adheres and sticks, or to which the liquid adheres and penetrates. Specifically, the sheet includes paper, resin film, wallpaper, electronic boards, and the like. The material of the sheet may be paper, leather, metal, plastic, glass, wood, ceramics, and the like. The sheet onto which the liquid adheres may be continuous paper (rolled medium), but if the medium is cut, the application of the present invention can more effectively suppress flapping of the medium due to airflow. [Explanation of symbols]

[0106] 3. Image forming section 14 Liquid ejection head (liquid ejection section) 29 Inside of the paper transport path (Inside of the sheet transport path) 30 Outside of the paper transport path (Outside of the sheet transport path) 36 Drive unit (heat dissipation member) 37 Power supply unit (heat dissipation material) 38 Electrical equipment (heat dissipation parts) 40 Transport device 41A Conveying roller (conveying member) 41B Conveying roller (conveying member) 42A Guide member 42B Guide member 43A Hole 43B Hole 51 Air blast components 52 Fans 53 Duct 53a Ventilation vent 54 Cover member 100 Image forming device 400 Aftertreatment device P Paper (sheet) Q Downstream side of rotation direction R Upstream side of rotation direction Y Paper transport direction (sheet transport direction) [Prior art documents] [Patent documents]

[0107] [Patent Document 1] JP 2017-90007 A

Claims

1. a conveying member having an outer surface that contacts a sheet having a liquid attached thereto, the conveying member conveying the sheet; a blower member that blows warm air generated from the heat dissipation member onto an outer surface of the conveying member; A guide member that guides the sheet in a sheet conveying direction; Equipped with the conveying member is disposed so as to straddle an outer side of the sheet conveying path and an inner side of the sheet conveying path of the guide member, the air blowing member blows air to an outer surface of the conveying member outside the sheet conveying path, A conveying device, characterized in that the direction of air blowing from the air blowing member to the conveying member is a direction away from the guide member.

2. A conveying member having an outer surface that contacts a sheet having a liquid attached thereto, and conveying the sheet; a blower member that blows warm air generated from the heat dissipation member onto an outer surface of the conveying member; Equipped with the air blowing member has a plurality of air blowing openings in a direction intersecting a sheet conveying direction, A conveying device characterized in that the warm air blown from the plurality of air outlets has different air volumes or air speeds.

3. A conveying member having an outer surface that contacts a sheet having a liquid attached thereto and that conveys the sheet; a blower member that blows warm air generated from the heat dissipation member onto an outer surface of the conveying member; Equipped with the air blowing member has a plurality of air blowing openings in a direction intersecting a sheet conveying direction, A conveying device characterized in that the volume or speed of the warm air blown from the multiple air outlets is changeable.

4. A guide member for guiding the sheet in a sheet conveying direction, the conveying member is disposed so as to straddle an outer side of the sheet conveying path and an inner side of the sheet conveying path of the guide member, The conveying device according to claim 2 , wherein the air blowing member blows air to an outer surface of the conveying member outside the sheet conveying path.

5. The guide member has a hole in which the conveying member is disposed, The conveying device according to claim 1 or 4, wherein a gap is formed between an edge of the hole and an outer surface of the conveying member.

6. The conveying member conveys the sheet by rotating, 6. The conveying device according to claim 1, wherein the air blowing member blows air to an outer surface of the conveying member on a downstream side in a rotation direction thereof, outside the sheet conveying path.

7. The conveying member conveys the sheet by rotating, 7. The conveying device according to claim 1, wherein the air blowing member blows air to an outer surface of the conveying member on an upstream side in a rotation direction, outside the sheet conveying path.

8. The conveying members are arranged at positions contacting both sides of the sheet, The transport device according to claim 1 , wherein the air blowing member blows air to an outer surface of each of the transport members.

9. A conveying device described in any one of claims 1 to 8, wherein the blowing direction of the air blowing member relative to the conveying member is a direction that forms an acute angle with respect to the sheet conveying direction.

10. A conveying device as described in any one of claims 1 to 9, comprising a cover member arranged at a distance from the outer surface of the conveying member.

11. The conveying members are disposed at positions contacting both sides of the sheet, The conveying device according to claim 1 , wherein the conveying members are arranged so as to be shifted from each other in the sheet conveying direction.

12. A conveying device described in any one of claims 1 to 11, wherein the heat dissipation member is arranged in a space partitioned from the space in which the conveying member is arranged.

13. A liquid ejection unit that ejects liquid onto a sheet; A conveying device according to any one of claims 1 to 12, A liquid ejection device comprising:

14. An image forming section that applies liquid to a sheet to form an image; A conveying device according to any one of claims 1 to 12, An image forming apparatus comprising:

15. A conveying device according to any one of claims 1 to 12, a post-processing section that processes the sheet conveyed by the conveying device; A post-processing device comprising:

Images