JP2018130876A - Inkjet recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inkjet recording device which can reduce user' waiting time without complicating a structure of recording heads.SOLUTION: An inkjet recording device includes: line heads 31 to 34 including recording heads for discharging an ink; sub ink tanks which are provided on ink supply paths from an ink container for storing the ink to the respective line heads 31 to 34 and store the ink supplied to the respective line heads 31 to 34; multiple fourth supply pipelines 97 which are provided at the downstream side of the sub ink tanks at the supply paths in an ink supply direction, correspond to the respective line heads 31 to 34, and are disposed with parts thereof collected; and a heating part 98 which heats the respective fourth supply pipelines 97.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an ink jet recording apparatus.

  In an ink jet recording apparatus, an image is formed on a sheet by discharging ink from a recording head (see, for example, Patent Document 1). Further, in the ink jet recording apparatus, when the temperature of the ink decreases, the ink discharge amount in the recording head decreases due to the increase in the viscosity of the ink due to the temperature decrease, and the image quality of the image formed on the sheet may decrease. On the other hand, the structure provided with the heater which heats ink is known. For example, the heater is provided in an ink storage unit such as an ink container, an intermediate storage unit such as a sub ink tank provided on an ink supply path from the ink storage unit to the recording head, or a recording head.

JP 2008-168631 A

  By the way, when the recording head is provided with a heater, the configuration of the recording head becomes complicated. On the other hand, in the case where a heater is provided in the ink storage unit or the intermediate storage unit, the time until the ink in the recording head reaches a printable temperature is prolonged as compared with a configuration in which a heater is provided in the recording head. To do. Therefore, the waiting time of the user is prolonged when the ink jet recording apparatus is turned on.

  An object of the present invention is to provide an ink jet recording apparatus that can reduce the waiting time of the user without complicating the configuration of the recording head.

  An ink jet recording apparatus according to the present invention includes a recording head and a heater. The recording head ejects ink. The heater heats the ink in at least a part of an ink supply pipe between the ink storage unit that stores the ink and the recording head.

  According to the present invention, an ink jet recording apparatus that can reduce the waiting time of the user without complicating the configuration of the recording head is realized.

FIG. 1 is a diagram showing a configuration of an ink jet recording apparatus according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration of a recording unit in the inkjet recording apparatus according to the embodiment of the present invention. FIG. 3 is a diagram illustrating a configuration of an ink supply unit in the ink jet recording apparatus according to the embodiment of the present invention. FIG. 4 is a diagram illustrating a configuration of an ink supply unit in the ink jet recording apparatus according to the embodiment of the present invention. FIG. 5 is a diagram illustrating a configuration of a fourth supply pipe and a heating unit in the ink jet recording apparatus according to the embodiment of the present invention. FIG. 6 is a view showing a modification of the heating unit in the ink jet recording apparatus according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

[Schematic Configuration of Inkjet Recording Apparatus 10]
First, a schematic configuration of an inkjet recording apparatus 10 according to an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a schematic cross-sectional view showing the configuration of the inkjet recording apparatus 10. FIG. 2 is a plan view showing the configuration of the recording unit 3. 3 and 4 are perspective views showing the configuration of the ink supply unit 9. In FIG. 3, the description of the first discharge pipe 63, the second supply pipe 93, and the fourth supply pipe 97 is omitted.

  For convenience of explanation, the vertical direction is defined as the vertical direction D1 in the installation state (the state shown in FIG. 1) in which the ink jet recording apparatus 10 can be used. In addition, the front-rear direction D2 is defined with the front surface of the inkjet recording apparatus 10 shown in FIG. Further, a left-right direction D3 is defined with reference to the front side of the installed ink jet recording apparatus 10.

  The ink jet recording apparatus 10 is a printer capable of forming an image by an ink jet method. The present invention may be applied to an ink jet recording apparatus such as a facsimile machine, a copier, and a multifunction machine that can form an image by an ink jet method.

  As shown in FIGS. 1 and 3, the ink jet recording apparatus 10 includes a sheet placement unit 1, a sheet feeding unit 2, a recording unit 3, an ink container unit 4, a transport unit 5, a purge device 6, a paper discharge unit 7, A control unit 8 and an ink supply unit 9 are provided.

  A sheet to be printed by the inkjet recording apparatus 10 is placed on the sheet placement unit 1. As shown in FIG. 1, the sheet placement unit 1 includes paper feed cassettes 11 to 14 and a manual feed tray 15. For example, the sheets placed on each of the paper feed cassettes 11 to 14 and the manual feed tray 15 are sheet materials such as paper, coated paper, postcards, envelopes, and OHP sheets.

  The sheet feeding unit 2 supplies a sheet placed on the sheet placing unit 1 to the recording unit 3. As shown in FIG. 1, the paper feed unit 2 includes a conveyance path 21, pickup rollers 22 </ b> A to 22 </ b> E, a conveyance roller 23, and a registration roller 24. The conveyance path 21 is a sheet movement path from each of the sheet feeding cassettes 11 to 14 and the manual feed tray 15 to the recording unit 3. The pickup roller 22 </ b> A is provided corresponding to the paper feed cassette 11 and takes out sheets one by one from the paper feed cassette 11. The pickup rollers 22B to 22E are provided corresponding to each of the paper feed cassettes 12 to 14 and the manual feed tray 15, and, like the pickup roller 22A, take out the sheets one by one from the corresponding sheet placement unit. The conveyance roller 23 conveys the sheet taken out by the pickup rollers 22 </ b> A to 22 </ b> E to the registration roller 24. The registration roller 24 conveys the sheet to the recording unit 3 at a predetermined conveyance timing (image writing timing).

  The recording unit 3 records an image on a sheet supplied from the sheet feeding unit 2. As shown in FIG. 1, the recording unit 3 includes line heads 31 to 34 corresponding to black, cyan, magenta, and yellow colors, and a head frame 35 that supports these. The head frame 35 is supported by the casing of the inkjet recording apparatus 10. Note that the number of line heads provided in the recording unit 3 may be one or a plurality other than four.

  The line heads 31 to 34 are so-called line head type recording heads. That is, the ink jet recording apparatus 10 is a so-called line head type ink jet recording apparatus. As shown in FIG. 2, the line heads 31 to 34 are long in the front-rear direction D2. Specifically, each of the line heads 31 to 34 has a length corresponding to the width of the maximum size sheet among the sheets that can be placed on the sheet placement unit 1 in the front-rear direction D2. Each of the line heads 31 to 34 is fixed to the head frame 35 at a predetermined interval along the left-right direction D3.

  As shown in FIG. 2, each of the line heads 31 to 34 has a plurality of recording heads 30. The recording head 30 ejects ink toward the sheet conveyed by the conveyance unit 5. Specifically, a large number of ink ejection nozzles 301 having openings are provided on the surface of the recording head 30 facing the sheet conveyed by the conveyance unit 5. The recording head 30 includes a pressurizing chamber (not shown) corresponding to each of the nozzles 301, a piezoelectric element (not shown) provided corresponding to each of the pressurizing chambers, and a communication flow communicating with each of the pressurizing chambers. A path (not shown) is provided. The piezoelectric element ejects ink from the nozzle 301 in response to application of a voltage. Specifically, the piezoelectric element causes ink to be ejected from the nozzle 301 by pressurizing the ink stored in the pressurizing chamber.

  In the present embodiment, the line head 31 includes three recording heads 30 arranged in a staggered manner along the front-rear direction D2. Similarly to the line head 31, each of the other line heads 32-34 has three recording heads 30 arranged in a staggered manner along the front-rear direction D2.

  The ink container unit 4 includes ink containers 41 to 44 that store inks corresponding to black, cyan, magenta, and yellow. The ink containers 41 to 44 are connected to the same color line heads 31 to 34 via the ink supply unit 9. Here, each of the ink containers 41 to 44 is an example of an ink container in the present invention.

  The transport unit 5 transports a sheet on which an image is formed by the recording unit 3. Specifically, the transport unit 5 transports the sheet while facing the facing surface of the recording head 30. As shown in FIG. 1, the transport unit 5 includes a transport belt 51 and stretching rollers 52 to 53.

  The tension rollers 52 to 53 are provided below the line heads 31 to 34 so as to be separated in the left-right direction D3. The conveyor belt 51 is stretched below the line heads 31 to 34 by stretch rollers 52 to 53. For example, the gap between the conveying belt 51 and the facing surface of the recording head 30 is adjusted so that the gap between the sheet surface and the facing surface during image recording is 1 mm. The tension roller 52 is connected to a rotation shaft of a motor (not shown). When the tension roller 52 is rotated counterclockwise by the driving of the motor, the conveying belt 51 rotates in a direction in which the sheet can be conveyed leftward in the left-right direction D3. Accordingly, the sheet supplied from the paper feeding unit 2 is conveyed to the paper discharge unit 7 through the recording unit 3 by the rotation of the conveyance belt 51. The transport unit 5 is also provided with a suction unit (not shown) that sucks air from a large number of through holes formed in the transport belt 51 in order to attract the sheet to the transport belt 51.

  The paper discharge unit 7 discharges the sheet conveyed by the conveyance unit 5 to the outside of the inkjet recording apparatus 10. As shown in FIG. 1, the paper discharge unit 7 includes a transport belt 71, stretching rollers 72 to 73, a transport path 74, a transport roller 75, a paper discharge roller 76, and a paper discharge tray 77. The tension rollers 72 to 73 are provided on the left side of the transport unit 5 so as to be separated in the left-right direction D3. The transport belt 71 is stretched on the left side of the transport unit 5 by stretch rollers 72 to 73. The conveyance belt 71 conveys the sheet conveyed from the conveyance unit 5 in the left direction in the left-right direction D <b> 3 by rotating the stretching roller 72 counterclockwise by driving the motor. The conveyance path 74 is a sheet movement path from the sheet conveyance end position on the conveyance belt 71 to the sheet discharge tray 77. The conveyance roller 75 conveys the sheet in the conveyance path 74. The sheet discharge roller 76 discharges the sheet conveyed through the conveyance path 74 to the sheet discharge tray 77. The paper discharge unit 7 is also provided with a drying device (not shown) that dries the ink attached to the sheet.

  The purge device 6 is used for a purge process for recovering the function of the recording head 30 of each of the line heads 31 to 34. As shown in FIGS. 1, 3, and 4, the purge device 6 includes an ink tray 61, a carriage 62, a first discharge pipe 63, a pump 64, a second discharge pipe 65, and a waste ink tank 66. In addition, the purge device 6 includes a wiper member (not shown) that cleans the facing surface of each recording head 30.

  The ink tray 61 receives ink discharged from the nozzles 301 of each recording head 30. The carriage 62 supports the ink tray 61 and the wiper member. The ink tray 61 and the carriage 62 are provided below the transport belt 71. The carriage 62 is supported by a moving mechanism (not shown) so as to be movable in the left-right direction D3 and the up-down direction D1. For example, the moving mechanism is a conventionally well-known driving mechanism that moves the carriage 62 using a rack-pinion mechanism that converts a rotational motion of a gear coupled to a rotational shaft of a motor into a linear motion.

  Further, in the ink jet recording apparatus 10, the transport unit 5 is provided so as to be movable in the vertical direction D1 by an unillustrated lifting mechanism. The transport unit 5 is moved downward by the lifting mechanism when the purge process is executed. The carriage 62 is arranged below the line heads 31 to 34 after the transport unit 5 is moved downward by the lifting mechanism and then moved to the right by the moving mechanism. The carriage 62 is moved upward by the moving mechanism and is disposed at a purge position where the purge process can be performed.

  When the carriage 62 is disposed at the purge position, the purge process is executed. Specifically, in the purge process, the pump 96 described below is driven and controlled by the control unit 8, whereby ink is discharged from the nozzles 301 of the recording heads 30 toward the ink tray 61. By performing the purge process, high-viscosity ink remaining in the nozzles 301 of each recording head 30 is discharged, and clogging of the nozzles 301 is eliminated.

  The first discharge pipe 63 is an ink movement path that connects the bottom of the ink tray 61 and the pump 64. For example, the first discharge pipe 63 is a resin tube having one end connected to the ink tray 61 and the other end connected to the pump 64. The pump 64 sucks the ink discharged to the ink tray 61 and supplies it to the waste ink tank 66. The second discharge pipe 65 is an ink moving path that connects the pump 64 and the waste ink tank 66. For example, the second discharge pipe 65 is a resin tube having one end connected to the pump 64 and the other end connected to the waste ink tank 66. The waste ink tank 66 stores the ink discharged to the ink tray 61 by the purge process.

  The control unit 8 includes control devices such as a CPU, a ROM, and a RAM (not shown). The CPU is a processor that executes various arithmetic processes. The ROM is a non-volatile storage device in which information such as a control program for causing the CPU to execute various processes is stored in advance. The RAM is a volatile storage device used as a temporary storage memory (working area) for various processes executed by the CPU. In the control unit 8, various control programs stored in advance in the ROM are executed by the CPU. As a result, the inkjet recording apparatus 10 is comprehensively controlled by the control unit 8. For example, the control unit 8 performs the purge process when a predetermined execution condition is satisfied.

  By the way, in the ink jet recording apparatus 10, when the temperature of the ink is lowered, the ink discharge amount in the recording head 30 is lowered due to the increase in the viscosity of the ink due to the temperature drop, and the image quality of the image formed on the sheet is lowered. is there. On the other hand, the structure provided with the heater which heats ink is known. For example, the heaters include the ink containers 41 to 44, sub ink tanks 94 (see FIG. 3) provided on the ink supply paths between the ink containers 41 to 44 and the line heads 31 to 34, respectively, or recording. Provided on the head 30.

  Here, when the recording head 30 is provided with the heater, the configuration of the recording head 30 is complicated. On the other hand, when each of the ink containers 41 to 44 or the sub ink tank 94 is provided with the heater, a temperature at which the ink in the recording head 30 can be printed as compared with the configuration in which the recording head 30 is provided with the heater. The time to reach is prolonged. Therefore, the waiting time of the user is prolonged when the inkjet recording apparatus 10 is turned on.

  On the other hand, in the inkjet recording apparatus 10 according to the embodiment of the present invention, as described below, the waiting time of the user can be reduced without complicating the configuration of the recording head 30.

[Configuration of Ink Supply Unit 9]
Next, the ink supply unit 9 will be described with reference to FIGS. Here, FIG. 5 is a perspective view showing configurations of the fourth supply pipe 97 and the heating unit 98. In the following description, the ink containers 41 to 44 may be collectively referred to as an ink container 4X. Further, the line heads 31 to 34 may be collectively referred to as a line head 3X.

  The ink supply unit 9 supplies the ink stored in the ink container unit 4 to each of the line heads 31 to 34 of the recording unit 3. 3 and 4, the ink supply unit 9 includes a first supply pipe 91, a pump 92, a second supply pipe 93, a sub ink tank 94, a third supply pipe 95, a pump 96, and a fourth supply pipe. 97 and a heating unit 98. Here, the first supply pipe 91, the second supply pipe 93, the third supply pipe 95, and the fourth supply pipe 97 are examples of the supply pipe in the present invention. Moreover, the 1st supply piping 91 and the 2nd supply piping 93 are examples of the 1st piping in this invention. Moreover, the 3rd supply piping 95 and the 4th supply piping 97 are examples of the 2nd piping in this invention.

  The first supply pipe 91 is a movement path for ink that moves from the ink container 4 </ b> X to the pump 92. As shown in FIG. 3, the first supply pipe 91 is provided corresponding to each of the ink containers 41 to 44. For example, the first supply pipe 91 is a resin tube having one end connected to the ink container 4 </ b> X and the other end connected to the pump 92.

  The pump 92 can supply ink from the ink container 4X to the sub ink tank 94 via the first supply pipe 91 and the second supply pipe 93 (see FIG. 4). As shown in FIG. 3, the pump 92 is provided corresponding to each of the ink containers 41 to 44. For example, the pump 92 has a cylinder, a piston, and a check valve. The backflow prevention valve is provided at each connection portion of the pump 92 with the first supply pipe 91 and the second supply pipe 93, and regulates the backflow of ink from the sub ink tank 94 to the ink container 4X. In the pump 92, the piston is reciprocated in the cylinder, so that the ink stored in the ink container 4 </ b> X is pumped into the cylinder via the first supply pipe 91, and the second supply pipe 93 is To the sub-ink tank 94.

  The second supply pipe 93 is an ink moving path that moves from the pump 92 to the sub ink tank 94. As shown in FIG. 4, the second supply pipe 93 is provided corresponding to each of the ink containers 41 to 44. For example, the second supply pipe 93 is a resin tube having one end connected to the pump 92 and the other end connected to the sub ink tank 94.

  The sub ink tank 94 is provided between the ink container 4X and the line head 3X, and stores ink supplied to the line head 3X. As shown in FIG. 3, the sub ink tank 94 is provided corresponding to each of the ink containers 41 to 44. The sub ink tank 94 has a water surface sensor. The control unit 8 controls the driving of the pump 92 using the water level sensor, and maintains the position of the ink water level in the sub ink tank 94 within a predetermined range. As a result, the height difference between the opening in the nozzle 301 of the recording head 30 and the water level of the ink in the sub ink tank 94 is maintained within the above range, and the water pressure of the ink in the nozzle 301 becomes a predetermined water pressure (negative pressure). Is set. Here, the sub ink tank 94 is an example of the intermediate storage portion in the present invention.

  The third supply pipe 95 is an ink moving path that moves from the sub ink tank 94 to the pump 96. As shown in FIG. 3, the third supply pipe 95 is provided corresponding to each of the ink containers 41 to 44. For example, the third supply pipe 95 is a resin tube having one end connected to the sub ink tank 94 and the other end connected to the pump 96.

  The pump 96 relays the sub ink tank 94 and the line head 3X. The pump 96 can increase the water pressure of the ink in the nozzle 301 of the recording head 30 connected via the fourth supply pipe 97 to discharge the ink from the nozzle 301. The pump 96 is used for the purge process executed by the control unit 8. For example, the pump 96 has the same configuration as the pump 92. The pump 96 is an example of the relay unit in the present invention. The relay unit in the present invention may have a configuration different from that of the pump. Note that the ink supply unit 9 may not be provided with the pump 96.

  The fourth supply pipe 97 is an ink moving path that moves from the pump 96 to the line head 3X. The fourth supply pipe 97 is provided corresponding to each of the ink containers 41 to 44. For example, as shown in FIG. 5, the fourth supply pipe 97 is a resin tube having one end connected to the pump 96 and the other end connected to the line head 3 </ b> X. As shown in FIG. 5, the plurality of fourth supply pipes 97 are arranged in a state in which a part thereof is collected by a heat transfer section 98B described later.

  The heating unit 98 heats ink with at least a part of the first supply pipe 91, the second supply pipe 93, the third supply pipe 95, and the fourth supply pipe 97 provided between the ink container 4X and the line head 3X. To do.

  Specifically, the heating unit 98 heats at least a part of the third supply pipe 95 and the fourth supply pipe 97 that connect the sub ink tank 94 and the line head 3X. More specifically, the heating unit 98 heats the fourth supply pipe 97 at a position downstream of the pump 96 in the ink supply direction in the ink supply unit 9. Thereby, it is possible to shorten the time required for raising the ink in the recording head 30 to a printable temperature as compared with the configuration in which the heating unit 98 heats the third supply pipe 95. A configuration in which the heating unit 98 heats the third supply pipe 95 is conceivable as another embodiment. The present invention may also be applied to an ink jet recording apparatus that does not include an intermediate reservoir such as the sub ink tank 94 on the ink supply path between the ink container 4X and the line head 3X.

  As shown in FIG. 5, the heating unit 98 includes a heater 98A and a heat transfer unit 98B. For example, the heater 98A is a heating wire heater. The heater 98A may be another heater such as a halogen heater.

  The heat transfer section 98B is provided in contact with each of the heater 98A and the fourth supply pipe 97, and transfers the heat of the heater 98A to each of the fourth supply pipe 97. For example, the heat transfer part 98B is formed of a metal having high thermal conductivity such as aluminum and copper. As shown in FIG. 5, the heat transfer section 98B has a placement surface 98B1 and a plurality of wall portions 98B2. Each of the fourth supply pipes 97 is placed on the placement surface 98B1. The plurality of wall portions 98B2 are provided so as to be in contact with both side portions of each of the fourth supply pipes 97 placed on the placement surface 98B1. For example, the wall portions 98B2 are provided at a distance slightly longer than the diameter of the fourth supply pipe 97 on the placement surface 98B1. The heater 98A is provided in contact with the heat transfer section 98B below the placement surface 98B1 of the heat transfer section 98B. Each of the fourth supply pipes 97 is disposed in contact with the placement surface 98B1 and the wall part 98B2 of the heat transfer section 98B, so that the plurality of fourth supply pipes 97 are concentrated at the position where the heat transfer section 98B is disposed. The Therefore, the heater 98A can heat each of the fourth supply pipes 97 at a position where the fourth supply pipes 97 gather. In other words, it is possible to heat the plurality of fourth supply pipes 97 with one heater 98A. Further, since each of the fourth supply pipes 97 is disposed in contact with the placement surface 98B1 and each of the wall parts 98B2, the contact area between the heat transfer part 98B and each of the fourth supply pipes 97 increases, and the heater It is possible to improve the efficiency of heat transfer from 98A to each of the fourth supply pipes 97.

  In addition, each contact part with the 4th supply piping 97 in mounting surface 98B1 may be formed in the circular arc shape along the outer peripheral surface of the 4th supply piping 97. FIG. In addition, each of the contact portions with each of the wall portions 98B2 and the fourth supply pipe 97 may be formed in an arc shape along the outer peripheral surface of the fourth supply pipe 97. Moreover, the heat transfer part 98B may be in contact with the upper part and the side part of the heater 98A. Further, the heat transfer section 98B may have an internal space that can accommodate the heater 98A.

[Modification of heating unit 98]
Next, a modification of the heating unit 98 will be described with reference to FIG. Here, FIG. 6 is a view showing a modification of the heating unit 98.

  Unlike the heating unit 98 shown in FIG. 5, the heating unit 98 shown in FIG. 6 does not include the heat transfer unit 98B. The heating unit 98 shown in FIG. 6 includes a heater 98C. The heater 98C heats each of the fourth supply pipes 97 on the same principle as the heater 98A. The heater 98C is formed in a cylindrical shape. In the heating unit 98 according to the modification, each of the fourth supply pipes 97 is wound around the peripheral surface of a heater 98C configured in a columnar shape. Thereby, it is possible to improve the efficiency of heat transfer from the heater 98C to each of the fourth supply pipes 97 without providing the heat transfer section 98B. Further, each of the fourth supply pipes 97 is wound around the peripheral surface of the heater 98C, so that the plurality of fourth supply pipes 97 are concentrated at the arrangement position of the heat transfer section 98B. A configuration in which the heater 98 </ b> C is formed in a polygonal column shape can be considered as another modification of the heating unit 98. Further, a configuration in which each of the fourth supply pipes 97 is in contact with the heater 98C without being wound around the peripheral surface of the heater 98C is considered as another modification of the heating unit 98.

  For example, in the heating unit 98 according to the modification, the peripheral surface of the heater 98 </ b> C is covered with each of the fourth supply pipes 97. Thereby, it is possible to further improve the efficiency of heat transfer from the heater 98C to each of the fourth supply pipes 97 as compared with the configuration in which a part of the peripheral surface of the heater 98C is exposed. A configuration in which a part of the peripheral surface of the heater 98C is exposed is considered as another modification of the heating unit 98.

  Moreover, in the heating part 98 which concerns on a modification, each 4th supply piping 97 is wound around the surrounding surface of the heater 98C by the same winding number. Thereby, it is possible to suppress variation in temperature rise due to the heater 98C in each of the fourth supply pipes 97. A configuration in which the number of turns on the peripheral surface of the heater 98C is different in each of the fourth supply pipes 97 is considered as another modification of the heating unit 98.

  As described above, the inkjet recording apparatus 10 is provided with the heater 98A that heats the ink with the fourth supply pipe 97 provided between the ink container 4X and the line head 3X. Accordingly, it is possible to avoid complication of the configuration of the recording head 30 as compared with the configuration in which the recording head 30 is provided with the heater 98A. Further, as compared with the configuration in which the heaters 98A are provided in each of the ink containers 41 to 44 or the sub ink tank 94, it is possible to shorten the time until the ink in the recording head 30 reaches a printable temperature. . Therefore, it is possible to reduce the waiting time of the user without complicating the configuration of the recording head 30.

  The present invention is not limited to an inkjet recording apparatus that can perform color printing, and may be applied to an inkjet recording apparatus that can perform monochrome printing including one line head 3X.

DESCRIPTION OF SYMBOLS 1 Sheet loading part 2 Paper feed part 3 Recording part 4 Ink container part 5 Conveyance unit 6 Purge device 7 Paper discharge part 8 Control part 9 Ink supply part 10 Inkjet recording apparatus 30 Recording heads 31-34 Line heads 41-44 Ink container 91 1st supply piping 92 Pump 93 2nd supply piping 94 Sub ink tank 95 3rd supply piping 96 Pump 97 4th supply piping 98 Heating part 98A Heater 98B Heat-transfer part 98C Heater

Claims (9)

A recording head for ejecting ink;
A heater that heats the ink in at least a part of an ink supply pipe between an ink storage unit that stores the ink and the recording head;
An inkjet recording apparatus comprising: An intermediate storage unit that is provided between the ink storage unit and the recording head and stores ink supplied to the recording head;
The supply pipe includes a first pipe connecting the ink storage part and the intermediate storage part, and a second pipe connecting the intermediate storage part and the recording head,
The heater heats at least a part of the second pipe;
The ink jet recording apparatus according to claim 1. A relay unit that relays the intermediate storage unit and the recording head;
The heater heats the second pipe at a position downstream of the relay section in the second pipe in the ink supply direction;
The ink jet recording apparatus according to claim 2. A plurality of the recording heads corresponding to a plurality of colors;
A plurality of the supply pipes corresponding to a plurality of the recording heads and arranged in a state where at least a part thereof is gathered, and
The heater heats each of the supply pipes at a position where the supply pipes gather.
The ink jet recording apparatus according to claim 1. Provided in contact with each of the supply pipes at a position where each of the supply pipes is gathered, and includes a heat transfer section that transmits heat of the heater to each of the supply pipes.
The ink jet recording apparatus according to claim 4. The heat transfer section includes a mounting surface on which each of the supply pipes is mounted, and a plurality of wall portions that are in contact with both sides of each of the supply pipes mounted on the mounting surface.
The ink jet recording apparatus according to claim 5. The heater is cylindrical,
Each of the supply pipes is wound around the peripheral surface of the heater and gathered.
The ink jet recording apparatus according to claim 4. The heater has the peripheral surface covered by each of the supply pipes,
The ink jet recording apparatus according to claim 7. Each of the supply pipes is wound around the peripheral surface with the same number of turns.
The ink jet recording apparatus according to claim 7 or 8.

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