Liquid ejection device

Abstract

The present invention provides a liquid dispensing device with easily replaceable units. The liquid dispensing device (11) includes: a head having a nozzle for dispensing liquid; a supply unit (41) for supplying liquid to the head; a maintenance unit (71) for maintaining the head; a selector unit (141) for selecting the supply unit and the maintenance unit to be open to the atmosphere; and a housing (12) for housing the supply unit, the maintenance unit and the selector unit, the housing having an opening surface (22) with an exposure opening (25) and a cover for blocking the exposure opening, the exposure opening exposing the supply unit, the maintenance unit and the selector unit, and when viewed from a position opposite to the opening surface, the supply unit, the maintenance unit and the selector unit are located in non-overlapping positions.

Description

Technical Field

[0001] This invention relates to a liquid ejection device. Background Technology

[0002] Patent Document 1 describes a liquid dispensing device comprising multiple units, including a head unit, a wiping unit, a cover unit, and a dispensing unit, as well as a housing for storing these units. The liquid dispensing device is configured such that the cover unit and the dispensing unit can be replaced through openings formed in the housing. The cover unit can be accessed by removing the dispensing unit.

[0003] In such liquid ejection devices, replacing one unit requires removing the others. Therefore, replacing units can sometimes be labor-intensive and time-consuming.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2016-175279 Summary of the Invention

[0005] A liquid ejection device for solving the above-mentioned problem includes: a head having a nozzle for ejecting liquid; a supply unit for supplying liquid to the head; a maintenance unit for maintaining the head; a selector unit for selecting one of the supply unit and the maintenance unit to be open to the atmosphere; and a housing for housing the supply unit, the maintenance unit, and the selector unit, the housing having an opening with an exposed opening surface and a cover for blocking the exposed opening, the exposed opening exposing the supply unit, the maintenance unit, and the selector unit, and when viewed from a position opposite to the exposed opening surface, the supply unit, the maintenance unit, and the selector unit are located in non-overlapping positions. Attached Figure Description

[0006] Figure 1 This is a front view showing one embodiment of the liquid ejection device.

[0007] Figure 2 This is a three-dimensional view of the liquid ejection device.

[0008] Figure 3 From Figure 2 The three-dimensional image of the exposed cover was removed.

[0009] Figure 4 A three-dimensional view of the multiple units of a liquid ejection device.

[0010] Figure 5 For from and Figure 4 A stereoscopic image viewed from different angles.

[0011] Figure 6This is a schematic diagram showing the internal structure of a liquid ejection device.

[0012] Figure 7 A three-dimensional view of the supply unit.

[0013] Figure 8 For from and Figure 7 A stereoscopic image viewed from different angles.

[0014] Figure 9 A three-dimensional view of the supply pallet and the device pallet.

[0015] Figure 10 A 3D view of the maintenance unit.

[0016] Figure 11 To maintain the 3D view of the pallet.

[0017] Figure 12 This is a 3D view of the installation unit.

[0018] Figure 13 A perspective view of the cover unit and the wiping unit.

[0019] Figure 14 For from and Figure 13 A stereoscopic image viewed from different angles.

[0020] Figure 15 For from and Figure 13 as well as Figure 14 Images taken from different angles.

[0021] Figure 16 This is a 3D view of the selector unit.

[0022] Figure 17 This is a three-dimensional view of the first to fourth relay channels.

[0023] Figure 18 This is a diagram showing the exposed opening from a position opposite to the opening surface.

[0024] Figure 19 From Figure 18 The diagram shows the supply unit, maintenance unit, and selector unit removed from the image. Detailed Implementation

[0025] The following description describes one embodiment of the liquid ejection device with reference to the accompanying drawings. The liquid ejection device is an inkjet printer that records images such as text and photographs by ejecting ink, an example of a liquid, onto a medium such as paper or cloth.

[0026] like Figure 1 As shown, the liquid ejection device 11 includes a housing 12. The housing 12 will be described later.

[0027] The liquid dispensing device 11 has one or more receiving sections 13. The receiving section 13 is configured to receive the medium M1. The receiving section 13 is, for example, a box that can be pulled out relative to the housing 12.

[0028] The liquid ejection device 11 includes a conveying path 14. The conveying path 14 is the path through which the medium M1 is conveyed. The conveying path 14 extends within the housing 12. In this example, the conveying path 14 extends in such a way that the medium M1 is discharged from the receiving section 13 to the outside of the housing 12. Images are recorded during the conveying of the medium M1 along the conveying path 14.

[0029] The liquid ejection device 11 includes a conveying section 15. The conveying section 15 is configured to convey the medium M1. The conveying section 15 has, for example, one or more rollers. The conveying section 15 conveys the medium M1 stored in the receiving section 13 along the conveying path 14.

[0030] In this example, the conveying unit 15 includes a conveyor belt 16, a first pulley 17, and a second pulley 18. The conveyor belt 16 is wound around the first pulley 17 and the second pulley 18. The conveyor belt 16 attracts the medium M1, for example, through electrostatic adsorption. Thus, the conveyor belt 16 supports the medium M1. The first pulley 17 and the second pulley 18 are located along the conveying path 14. By rotating the first pulley 17 and the second pulley 18, the conveyor belt 16 rotates circumferentially. As a result, the medium M1 supported on the conveyor belt 16 is conveyed.

[0031] The liquid ejection device 11 includes a stacker 19. The recorded medium M1 is loaded in the stacker 19. The stacker 19 is located outside the housing 12, for example. In this example, the medium M1 discharged to the outside of the housing 12 via the transport path 14 is loaded in the stacker 19.

[0032] Next, the basket 12 will be explained.

[0033] like Figure 2 As shown, the basket 12 is, for example, a rectangular parallelepiped as a whole. The basket 12 has multiple faces. The basket 12 has a pull-out face 21. The pull-out face 21 is the face from which the storage part 13 is pulled out of the basket 12. The basket 12 has an opening face 22. The opening face 22 is, for example, the face adjacent to the pull-out face 21.

[0034] The basket 12 has one or more covers. The basket 12 has an open cover 23. The open cover 23 is located on the pull-out surface 21. The open cover 23 is configured, for example, to be openable and closable on the basket 12. When the open cover 23 is opened, the interior of the basket 12 is exposed. The open cover 23 can also be configured to be detachable and removable on the basket 12. The basket 12 has an exposure cover 24. The exposure cover 24 is located on the opening surface 22. The exposure cover 24 is configured, for example, to be detachable and removable on the basket 12. Similarly to the open cover 23, the exposure cover 24 can also be configured to be openable and closable on the basket 12.

[0035] like Figure 3 As shown, the housing 12 has an opening 25. The opening 25 opens into the opening surface 22. The opening 25 is blocked by an exposure cover 24. When the exposure cover 24 is removed, the opening 25 is exposed. The interior of the housing 12 is exposed through the opening 25. More specifically, the multiple units of the liquid dispensing device 11 are exposed through the opening 25.

[0036] like Figure 4 , Figure 5 as well as Figure 6 As shown, the liquid dispensing device 11 includes multiple units. For example, the liquid dispensing device 11 includes a head unit 31, a supply unit 41, a maintenance unit 71, a mounting unit 101, a cover unit 111, a wiping unit 131, and a selector unit 141. Figure 4 as well as Figure 5 In this case, head unit 31 is omitted. The basket 12 stores these units.

[0037] The liquid dispensing device 11 includes multiple fixing components. These fixing components are components that respectively fix multiple units to the housing 12. For example, the multiple fixing components fix the supply unit 41, the maintenance unit 71, and the selector unit 141 to the housing 12. The fixing components are, for example, screws, pins, etc. The multiple units are respectively fixed to the housing 12 by the fixing components. Specifically, the multiple units are fixed to the metal plate included in the housing 12 by the fixing components. The fixing components will be appropriately described together with the description of the individual units.

[0038] like Figure 6 As shown, the liquid ejection device 11 includes a head unit 31. The head unit 31 is a unit for recording images on the medium M1.

[0039] The head unit 31 has a head 32. The head 32 has one or more nozzles 33. The head 32 ejects liquid from the nozzles 33. The head 32 has a nozzle surface 34 that serves as the opening of the nozzles 33. The head 32 records an image on the medium M1 by ejecting liquid from the nozzles 33 onto the medium M1.

[0040] The head 32 records images on the medium M1 being conveyed by the conveyor section 15. The head 32 is, for example, located opposite the conveyor belt 16. In this example, the head 32 records images on the medium M1 supported by the conveyor belt 16.

[0041] The head unit 31 has a first head channel 35 and a second head channel 36. The first head channel 35 and the second head channel 36 are channels for the flow of liquid. The first head channel 35 and the second head channel 36 are connected to the supply unit 41.

[0042] The first head channel 35 and the second head channel 36 each have a head channel portion 37. The head channel portion 37 may include a flexible hose, a rigid conduit, or a channel formed by grooves engraved on a plate.

[0043] The first head channel 35 and the second head channel 36 have a joint. The first head channel 35 and the second head channel 36 share a common head joint 38. The head joint 38 is located at one end of the head channel portion 37. The head joint 38 constitutes one end of the first head channel 35 and one end of the second head channel 36. The first head channel 35 and the second head channel 36 may also each have a joint separately.

[0044] The first head channel 35 and the second head channel 36 extend from the head 32. The first head channel 35 and the second head channel 36 are channels that connect the head 32 to the supply unit 41. The head connector 38 is located at the top of the first head channel 35 and the second head channel 36.

[0045] The liquid ejection device 11 includes a supply unit 41. The supply unit 41 is a unit that supplies liquid to the head 32.

[0046] The supply unit 41 has a retainer 42. The retainer 42 is configured to accommodate more than one liquid reservoir 43. In this example, the retainer 42 is configured to accommodate four liquid reservoirs 43. The four liquid reservoirs 43 may each hold a different liquid. For example, the four liquid reservoirs 43 may each hold blue-green ink, magenta ink, yellow ink, and black ink.

[0047] The liquid reservoir 43 is, for example, a box for storing liquid. When the liquid reservoir 43 is mounted on the retainer 42, liquid can be supplied from the liquid reservoir 43 to the head 32. The liquid reservoir 43 can be replaced, for example, by pulling out the surface 21. The liquid reservoir 43 can be opened through the opening cover 23 for replacement. The liquid reservoir 43 may also have a reservoir valve 44. In this case, the reservoir valve 44 is opened by the liquid reservoir 43 being mounted on the retainer 42.

[0048] The supply unit 41 has a first tank 45. The first tank 45 is connected to a retainer 42. The first tank 45 is configured to store liquid. The first tank 45 stores liquid flowing from the liquid reservoir 43. In the first tank 45, liquid flows from the liquid reservoir 43, for example, using a water level difference.

[0049] The supply unit 41 has a second tank 46. The second tank 46 is connected to the first tank 45. The second tank 46 is configured to store liquid. The second tank 46 stores the liquid flowing from the first tank 45.

[0050] The supply unit 41 has a check valve. Within the supply unit 41, a tank valve 47 serves as the check valve. The tank valve 47 is located between the first tank 45 and the second tank 46. That is, the first tank 45 and the second tank 46 are connected via the tank valve 47. The tank valve 47 allows liquid to flow from the first tank 45 to the second tank 46. The tank valve 47 restricts the flow of liquid from the second tank 46 to the first tank 45.

[0051] The supply unit 41 has a first supply channel 48, a second supply channel 49, a third supply channel 50, a fourth supply channel 51, and a fifth supply channel 52. The first supply channel 48 and the second supply channel 49 are channels for liquid flow. The third supply channel 50, the fourth supply channel 51, and the fifth supply channel 52 are channels for gas flow. The first supply channel 48 and the second supply channel 49 are connected to the head unit 31. The third supply channel 50, the fourth supply channel 51, and the fifth supply channel 52 are connected to the selector unit 141.

[0052] The first supply channel 48 and the second supply channel 49 each have a liquid flow channel portion 53. In this example, the liquid flow channel portion 53 includes a flexible hose. The liquid flow channel portion 53 may include, for example, a rigid conduit or a flow channel formed by grooves etched on a plate.

[0053] The first supply channel 48 and the second supply channel 49 have a connector. The first supply channel 48 and the second supply channel 49 share a common first supply connector 54. The first supply connector 54 is located at one end of the liquid channel portion 53. The first supply connector 54 constitutes one end of the first supply channel 48 and one end of the second supply channel 49. The first supply channel 48 and the second supply channel 49 may also each have a connector separately.

[0054] The first supply channel 48 extends from the first tank 45. The first supply channel 48 extends from the lower part of the first tank 45. The first supply channel 48 is a channel connecting the first tank 45 to the head unit 31. The first supply connector 54 is located at the top of the first supply channel 48.

[0055] The second supply channel 49 extends from the second tank 46. The second supply channel 49 extends from the lower part of the second tank 46. The second supply channel 49 is a channel that connects the second tank 46 to the head unit 31. The first supply connector 54 is located at the top of the second supply channel 49.

[0056] The first supply connector 54 is connected to the head connector 38. Thus, the first supply channel 48 is connected to the first head channel 35. The second supply channel 49 is connected to the second head channel 36. The supply unit 41 and the head unit 31 are connected together through the first supply channel 48, the second supply channel 49, the first head channel 35, and the second head channel 36. Liquid flows between the first tank 45 and the head 32 through the first supply channel 48 and the first head channel 35. Liquid flows between the second tank 46 and the head 32 through the second supply channel 49 and the second head channel 36.

[0057] The liquid flow channel portion 53 can also be directly connected to the head connector 38. The head flow channel portion 37 can also be directly connected to the first supply connector 54. The connection between the head unit 31 and the supply unit 41 is simplified through the head connector 38 and the first supply connector 54.

[0058] When printing is performed at head 32, liquid is supplied from first tank 45 to head 32 via first supply channel 48 and first head channel 35, and liquid is supplied from second tank 46 to head 32 via second supply channel 49 and second head channel 36. For example, liquid is supplied to head 32 using the water level differences between first tank 45 and head 32, and between second tank 46 and head 32. By utilizing both the channel formed by first supply channel 48 and first head channel 35, and the channel formed by second supply channel 49 and second head channel 36, the amount of liquid supplied is increased compared to using only one channel. Therefore, even when head 32 consumes a large amount of liquid, the liquid supply remains relatively stable.

[0059] When printing is not performed on head 32, for example, the liquid circulates in the first tank 45, the second tank 46, and head 32. In this case, the liquid is fed from the second tank 46 to head 32 through the second supply channel 49 and the second head channel 36, and the liquid is fed from head 32 to first tank 45 through the first supply channel 48 and the first head channel 35. This circulation of the liquid suppresses the sedimentation of components contained in the liquid.

[0060] The third supply channel 50, the fourth supply channel 51, and the fifth supply channel 52 each have a gas flow channel portion 55. In this example, the gas flow channel portion 55 includes a flow channel formed by grooves etched into the plate. The gas flow channel portion 55 may include, for example, a flexible hose or a rigid conduit.

[0061] The third supply channel 50, the fourth supply channel 51, and the fifth supply channel 52 have connectors. The third supply channel 50, the fourth supply channel 51, and the fifth supply channel 52 share a common second supply connector 56. The second supply connector 56 is located at one end of the gas flow channel portion 55. The second supply connector 56 constitutes one end of the third supply channel 50, one end of the fourth supply channel 51, and one end of the fifth supply channel 52. Alternatively, the third supply channel 50, the fourth supply channel 51, and the fifth supply channel 52 may each have an individual connector.

[0062] The third supply channel 50 extends from the first tank 45. The third supply channel 50 extends from the top of the first tank 45. The third supply channel 50 is a channel that connects the first tank 45 to the selector unit 141. The second supply connector 56 is located at the top of the third supply channel 50.

[0063] A fourth supply channel 51 extends from the second tank 46. The fourth supply channel 51 extends from the upper part of the second tank 46. The fourth supply channel 51 is a channel connecting the second tank 46 to the selector unit 141. A second supply connector 56 is located at the top of the fourth supply channel 51.

[0064] The fifth supply channel 52 extends from the pressurizing section 57, which will be described later. The fifth supply channel 52 is a channel that connects the pressurizing section 57 to the selector unit 141. The second supply connector 56 is located at the top end of the fifth supply channel 52.

[0065] The supply unit 41 has a pressurizing section 57. The pressurizing section 57 is configured to pressurize the liquid inside the head 32. The pressurizing section 57 is, for example, a diaphragm pump. The pressurizing section 57 has, for example, a flexible membrane and a spring for pressing the flexible membrane.

[0066] The pressurizing unit 57 is located in the first supply channel 48. By being driven, the pressurizing unit 57 pressurizes the liquid within the head 32 through the first supply channel 48 and the first head channel 35. As a result, the liquid is violently ejected from the nozzle 33. Along with the violent ejection of the liquid from the nozzle 33, air bubbles, foreign matter, etc., within the head 32 are expelled. In this example, the violent ejection of liquid from the nozzle 33 by the pressurizing unit 57 is referred to as cleaning.

[0067] The supply unit 41 has a liquid level sensor 58. The liquid level sensor 58 is located, for example, inside the first tank 45. The liquid level sensor 58 detects, for example, the liquid level of the liquid stored in the first tank 45. Thus, the liquid dispensing device 11 knows the amount of liquid stored in the first tank 45.

[0068] The supply unit 41 has a filter 59. The filter 59 is located, for example, inside the second tank 46. The filter 59 is located in the second tank 46 at a connection point connected to the second supply channel 49. The filter 59 captures foreign matter from the liquid flowing from the second tank 46 into the second supply channel 49.

[0069] The supply unit 41 has one or more on / off valves. In the supply unit 41, for example, a first supply valve 60, a second supply valve 61 and a third supply valve 62 are provided as on / off valves.

[0070] The first supply valve 60 is located in the first supply channel 48. Specifically, the first supply valve 60 is located in the first supply channel 48 between the first tank 45 and the pressurization section 57. When the first supply valve 60 is opened, liquid can flow in the first supply channel 48.

[0071] The second supply valve 61 is located in the second supply channel 49. When the second supply valve 61 is opened, liquid can flow in the second supply channel 49.

[0072] The third supply valve 62 is located in the first tank 45. Specifically, the third supply valve 62 is located in the first tank 45 at the connection position with the retainer 42. When the third supply valve 62 is opened, liquid can flow from the liquid reservoir 43 to the first tank 45.

[0073] The supply unit 41 has one or more moisture-permeable membranes. A moisture-permeable membrane is a membrane through which gas can easily pass but where liquid cannot. In the supply unit 41, a first supply membrane 63 and a second supply membrane 64 serve as moisture-permeable membranes.

[0074] The first supply membrane 63 is located in the third supply channel 50. The first supply membrane 63 reduces the likelihood of liquid flowing in the third supply channel 50. The first supply membrane 63 also reduces the likelihood of liquid flowing from the first tank 45 to the selector unit 141.

[0075] The second supply membrane 64 is located in the fourth supply channel 51. The second supply membrane 64 reduces the likelihood of liquid flowing in the fourth supply channel 51. The second supply membrane 64 also reduces the likelihood of liquid flowing from the second tank 46 to the selector unit 141.

[0076] like Figure 6 , Figure 7 , Figure 8as well as Figure 9 As shown, the supply unit 41 has a tray. The supply unit 41 has a supply tray 65. The supply tray 65 is located at the bottom of the supply unit 41. The supply tray 65 catches liquid that leaks from the supply unit 41. For example, the supply tray 65 catches liquid that leaks from the liquid container 43, liquid that leaks from the first can 45, and liquid that leaks from the second can 46. By catching the liquid with the supply tray 65, the possibility of liquid leaking from the supply unit 41 spreading into the container 12 is reduced.

[0077] The supply unit 41 has a detection unit. The supply unit 41 has a supply detection unit 66. The supply detection unit 66 is located on the supply tray 65. The supply detection unit 66 detects the liquid received by the supply tray 65. The supply detection unit 66 detects the liquid, for example, by touching the liquid. By detecting the liquid with the supply detection unit 66, the liquid dispensing device 11 can detect any leakage of liquid in the supply unit 41. The liquid dispensing device 11, for example, notifies the user of any leakage of liquid in the supply unit 41 based on the detection result of the supply detection unit 66.

[0078] exist Figure 8 The diagram illustrates eight liquid flow channels 53. This is because the supply unit 41 in this example supplies four types of liquid to the head 32. In the supply unit 41, a first supply channel 48 and a second supply channel 49 are prepared for each liquid reservoir 43 mounted on the holder 42.

[0079] The liquid dispensing device 11 includes a tray. The liquid dispensing device 11 includes a device tray 67, which is independent of the supply tray 65. The device tray 67 is located below the supply tray 65. The device tray 67 is configured to receive the liquid received by the supply tray 65.

[0080] The device tray 67 has a connecting portion 68. The device tray 67 is connected to the supply tray 65 via the connecting portion 68. The connecting portion 68 is a portion of the device tray 67 extending toward the supply tray 65. The connecting portion 68 overlaps the supply tray 65 vertically. The connecting portion 68 receives liquid dripping from the supply tray 65. In this manner, the device tray 67 receives the liquid received by the supply tray 65.

[0081] In the event of liquid leakage from the liquid collection body 43, it is possible that the liquid may not be completely contained in the supply tray 65. Therefore, in this example, when the supply tray 65 has contained more than a predetermined amount of liquid, the liquid will flow from the supply tray 65 to the device tray 67. By containing the liquid in the device tray 67, the possibility of liquid leaking from the supply unit 41 extending into the basket 12 is reduced.

[0082] The liquid dispensing device 11 includes a detection unit. The liquid dispensing device 11 also includes a leakage detection unit 69, independent of the supply detection unit 66. The leakage detection unit 69 has, for example, the same structure as the supply detection unit 66. The leakage detection unit 69 is located in the device tray 67. The leakage detection unit 69 detects the liquid received by the device tray 67. By detecting the liquid with the leakage detection unit 69, the liquid dispensing device 11 can detect a large amount of liquid leakage in the supply unit 41. Based on the detection result of the leakage detection unit 69, the liquid dispensing device 11 can notify the user of the large amount of liquid leakage in the supply unit 41.

[0083] like Figure 7 As shown, the liquid dispensing device 11 includes a supply fixing member 70 as an example of a fixing member. The supply fixing member 70 fixes the supply unit 41 to the housing 12. The supply fixing member 70 is mounted on the supply tray 65, for example. Thus, the supply tray 65 is fixed relative to the housing 12. When the supply fixing member 70 is removed from the supply tray 65, the supply unit 41 can be removed from the housing 12. The supply unit 41 can be removed through the opening 25.

[0084] like Figure 6 As shown, the liquid ejection device 11 includes a maintenance unit 71. The maintenance unit 71 is a unit for maintaining the head 32.

[0085] The maintenance unit 71 has a humidifier reservoir 72. The humidifier reservoir 72 is configured to store liquid. Humidifier is stored as a liquid in the reservoir 72. The humidifier is used to moisturize the nozzle 33. The humidifier is, for example, water.

[0086] The maintenance unit 71 has a buffer tank 73. The buffer tank 73 is configured to store liquid. Waste liquid is stored in the buffer tank 73 as liquid. The waste liquid is liquid discharged from the head 32. The waste liquid is, for example, liquid discharged from the head 32 by rinsing. The waste liquid is, for example, liquid discharged from the head 32 by flushing. Flushing is an action to suppress clogging of the nozzle 33 so that the head 32 can properly spray liquid.

[0087] The maintenance unit 71 has a first maintenance flow channel 74, a second maintenance flow channel 75, a third maintenance flow channel 76, a fourth maintenance flow channel 77, and a fifth maintenance flow channel 78. The first maintenance flow channel 74 is a gas flow channel. The second maintenance flow channel 75, the third maintenance flow channel 76, the fourth maintenance flow channel 77, and the fifth maintenance flow channel 78 are mainly liquid flow channels.

[0088] The first maintenance flow channel 74 is connected to the selector unit 141. The second maintenance flow channel 75, the third maintenance flow channel 76, and the fourth maintenance flow channel 77 are connected to the cover unit 111. The fifth maintenance flow channel 78 is connected to the wiping unit 131.

[0089] The first maintenance channel 74, the second maintenance channel 75, the third maintenance channel 76, the fourth maintenance channel 77, and the fifth maintenance channel 78 each have a maintenance channel portion 79. In this example, the maintenance channel portion 79 includes a flexible hose. The maintenance channel portion 79 may include, for example, a rigid conduit or a channel formed by grooves etched into a plate.

[0090] The first maintenance flow channel 74, the second maintenance flow channel 75, the third maintenance flow channel 76, the fourth maintenance flow channel 77, and the fifth maintenance flow channel 78 have joints. The first maintenance flow channel 74, the second maintenance flow channel 75, the third maintenance flow channel 76, the fourth maintenance flow channel 77, and the fifth maintenance flow channel 78 share a common maintenance joint 80. The maintenance joint 80 is located at one end of the maintenance flow channel portion 79. The maintenance joint 80 constitutes one end of the first maintenance flow channel 74, one end of the second maintenance flow channel 75, one end of the third maintenance flow channel 76, one end of the fourth maintenance flow channel 77, and one end of the fifth maintenance flow channel 78. The first maintenance flow channel 74, the second maintenance flow channel 75, the third maintenance flow channel 76, the fourth maintenance flow channel 77, and the fifth maintenance flow channel 78 may also each have other joints.

[0091] The first maintenance flow channel 74 extends from the humectant reservoir 72. The first maintenance flow channel 74 extends from the upper part of the humectant reservoir 72. The first maintenance flow channel 74 is a flow channel connecting the humectant reservoir 72 to the selector unit 141. A maintenance connector 80 is located at the top of the first maintenance flow channel 74.

[0092] The second maintenance flow channel 75 extends from the moisturizing liquid tank 72. The second maintenance flow channel 75 extends from the upper part of the moisturizing liquid tank 72. The second maintenance flow channel 75 is a flow channel connecting the moisturizing liquid tank 72 to the cover unit 111. The maintenance connector 80 is located at the top of the second maintenance flow channel 75.

[0093] The third maintenance flow channel 76 extends from the moisturizing liquid tank 72. The third maintenance flow channel 76 extends from the upper part of the moisturizing liquid tank 72. The third maintenance flow channel 76 is a flow channel connecting the moisturizing liquid tank 72 to the cover unit 111. The maintenance connector 80 is located at the top of the third maintenance flow channel 76.

[0094] The third maintenance flow channel 76 has a branch portion 81. The branch portion 81 is the part in the third maintenance flow channel 76 that branches off between the humidifier tank 72 and the maintenance connector 80. The branch portion 81 is connected to the mounting body 103 mounted on the mounting unit 101. Therefore, the third maintenance flow channel 76 is a flow channel that connects the humidifier tank 72 to the mounting body 103, and also a flow channel that connects the mounting body 103 to the cover unit 111.

[0095] The fourth maintenance flow channel 77 extends from the buffer tank 73. The fourth maintenance flow channel 77 extends from the upper part of the buffer tank 73. The fourth maintenance flow channel 77 is a flow channel connecting the buffer tank 73 to the cover unit 111. The maintenance connector 80 is located at the top of the fourth maintenance flow channel 77.

[0096] The fifth maintenance flow channel 78 is connected to the mounting body 103 mounted on the mounting unit 101. The fifth maintenance flow channel 78 extends from the mounting body 103. Therefore, the fifth maintenance flow channel 78 is a flow channel connecting the mounting body 103 and the wiping unit 131. That is, the mounting body 103 is connected to the wiping unit 131 via the maintenance unit 71. The maintenance connector 80 is located at the top end of the fifth maintenance flow channel 78.

[0097] The fifth maintenance flow channel 78 has a branch portion 82. The branch portion 82 is the part of the fifth maintenance flow channel 78 that branches off between the mounting body 103 and the maintenance connector 80. The branch portion 82 is connected to the buffer tank 73. Therefore, the fifth maintenance flow channel 78 is a flow channel that connects the buffer tank 73 to the mounting body 103, and also a flow channel that connects the buffer tank 73 to the wiping unit 131.

[0098] The maintenance unit 71 includes a moisturizing liquid level sensor 83. The moisturizing liquid level sensor 83 is located, for example, inside the moisturizing liquid tank 72. The moisturizing liquid level sensor 83 detects, for example, the liquid level of the liquid stored in the moisturizing liquid tank 72. Thus, the liquid dispensing device 11 determines the amount of moisturizing liquid stored in the moisturizing liquid tank 72.

[0099] The maintenance unit 71 has a moisture-permeable membrane. Within the maintenance unit 71, a maintenance membrane 84 serves as the moisture-permeable membrane. The maintenance membrane 84 is located, for example, within the humidifier tank 72. The maintenance membrane 84 is located at a connection point within the humidifier tank 72 that connects to the first maintenance flow channel 74. The maintenance membrane 84 reduces the likelihood of the humidifier flowing within the first maintenance flow channel 74. The maintenance membrane 84 also reduces the likelihood of the humidifier flowing from the humidifier tank 72 to the selector unit 141.

[0100] Maintenance unit 71 has multiple valves. For example, maintenance unit 71 has one or more on / off valves and one or more check valves. In this example, maintenance unit 71 has a first maintenance valve 85 as an on / off valve. Maintenance unit 71 also has a second maintenance valve 86, a third maintenance valve 87, and a fourth maintenance valve 88 as check valves.

[0101] The first maintenance valve 85 is located, for example, in the third maintenance flow channel 76. The first maintenance valve 85 is located at the bifurcation portion 81 in the third maintenance flow channel 76. When the first maintenance valve 85 is open, the humidifying fluid can flow in the bifurcation portion 81.

[0102] The second maintenance valve 86 is located, for example, in the second maintenance flow channel 75. The second maintenance valve 86 allows the humectant to flow from the cap unit 111 toward the humectant tank 72 in the second maintenance flow channel 75. The second maintenance valve 86 also restricts the flow of the humectant from the humectant tank 72 toward the cap unit 111 in the second maintenance flow channel 75.

[0103] The third maintenance valve 87 is located, for example, in the third maintenance flow channel 76. The third maintenance valve 87 is located at a different part of the third maintenance flow channel 76 from the branch portion 81. The third maintenance valve 87 is located in the third maintenance flow channel 76 between the branch position of the branch portion 81 and the humectant reservoir 72. The third maintenance valve 87 allows humectant to flow from the humectant reservoir 72 towards the branch position of the branch portion 81 within the third maintenance flow channel 76. The third maintenance valve 87 restricts the flow of humectant from the branch position of the branch portion 81 towards the humectant reservoir 72 within the third maintenance flow channel 76.

[0104] The fourth maintenance valve 88 is located, for example, in the third maintenance flow channel 76. The fourth maintenance valve 88 is located at the bifurcation portion 81 in the third maintenance flow channel 76. The fourth maintenance valve 88 is located at the bifurcation portion 81 between the mounting body 103 and the first maintenance valve 85. The fourth maintenance valve 88 allows the humectant to flow from the mounting body 103 towards the bifurcation position of the bifurcation portion 81 in the third maintenance flow channel 76. The fourth maintenance valve 88 restricts the flow of the humectant from the bifurcation position of the bifurcation portion 81 towards the mounting body 103 in the third maintenance flow channel 76.

[0105] The maintenance unit 71 has one or more suction pumps. In the maintenance unit 71, there are a first maintenance pump 89, a second maintenance pump 90 and a third maintenance pump 91 as suction pumps.

[0106] The first maintenance pump 89 is located in the third maintenance flow channel 76. The first maintenance pump 89 is located at a different part of the third maintenance flow channel 76 from the branch portion 81. The first maintenance pump 89 is located between the branch position of the branch portion 81 and the maintenance connector 80. The first maintenance pump 89, by being driven, delivers humectant from the humectant tank 72 or the mounting body 103 to the cover unit 111.

[0107] The second maintenance pump 90 is located in the fifth maintenance flow channel 78. The second maintenance pump 90 is located at the branch position of the branch portion 82 in the fifth maintenance flow channel 78. The second maintenance pump 90 is driven to deliver waste liquid from the wiping unit 131 or the buffer tank 73 to the mounting body 103.

[0108] The third maintenance pump 91 is connected to the buffer tank 73. In this example, two third maintenance pumps 91 are connected to the buffer tank 73. The third maintenance pump 91 draws fluid from the buffer tank 73. Thus, waste liquid is sent from the cover unit 111 to the buffer tank 73 through the fourth maintenance flow channel 77.

[0109] like Figure 6 , Figure 10 as well as Figure 11 As shown, the maintenance unit 71 has a tray. The maintenance unit 71 has a maintenance tray 92. The maintenance tray 92 is located at the bottom of the maintenance unit 71.

[0110] The maintenance tray 92 catches liquids, i.e., waste liquids or humidifiers, that leak from the maintenance unit 71. The maintenance tray 92 catches, for example, waste liquids leaking from the buffer tank 73. The maintenance tray 92 catches, for example, humidifiers leaking from the humidifier tank 72. By using the maintenance tray 92, the possibility of waste liquids leaking from the maintenance unit 71 and the possibility of leaked humidifiers spreading into the housing 12 is reduced.

[0111] The maintenance unit 71 has a detection unit. The maintenance unit 71 has a maintenance detection unit 93. The maintenance detection unit 93 is located in the maintenance tray 92.

[0112] The maintenance detection unit 93 detects the liquid, i.e., waste liquid or moisturizing liquid, held in the maintenance tray 92. The maintenance detection unit 93 has the same structure as, for example, the supply detection unit 66 and the leakage detection unit 69. By detecting the waste liquid or moisturizing liquid through the maintenance detection unit 93, the liquid dispensing device 11 can detect whether waste liquid or moisturizing liquid has leaked into the maintenance unit 71. Based on the detection results of the maintenance detection unit 93, the liquid dispensing device 11 notifies the user, for example, that waste liquid or moisturizing liquid has leaked into the maintenance unit 71.

[0113] In maintenance unit 71, the third maintenance pump 91 can also vent air towards maintenance tray 92. In this case, when the amount of waste liquid stored in buffer tank 73 approaches the maximum capacity of buffer tank 73, the waste liquid will be discharged into maintenance tray 92 by the third maintenance pump 91. The maintenance detection unit 93 detects this waste liquid, so that the liquid dispensing device 11 can determine that the amount of waste liquid stored in buffer tank 73 has approached the maximum capacity of buffer tank 73.

[0114] like Figure 10 As shown, the maintenance unit 71 has a connector 94. The connector 94 is the part that connects to the mounting body 103. The connector 94 forms the third maintenance flow channel 76 and the fifth maintenance flow channel 78.

[0115] The connector 94 has a connecting pin 95 and a supply pin 96. The connecting pin 95 and the supply pin 96 are connected to the mounting body 103. The connecting pin 95 forms a fifth maintenance flow channel 78. The supply pin 96 forms a third maintenance flow channel 76. Specifically, the supply pin 96 forms a bifurcation portion 81.

[0116] In the liquid dispensing device 11, a maintenance fixing member 97 is provided as an example of a fixing component. The maintenance fixing member 97 fixes the maintenance unit 71 relative to the housing 12. The maintenance fixing member 97 is mounted on a maintenance tray 92, for example. Thus, the maintenance tray 92 is fixed relative to the housing 12. When the maintenance fixing member 97 is removed from the maintenance unit 71, the maintenance unit 71 can be removed from the housing 12. The maintenance unit 71 can be removed through the opening 25.

[0117] like Figure 6 As shown, the liquid dispensing device 11 includes a mounting unit 101. The mounting unit 101 is a unit configured to accommodate a mounting body 103, which collects the liquid discharged as waste liquid from the head 32. In this example, the mounting body 103 is not limited to collecting waste liquid; it also collects moisturizing liquid.

[0118] The mounting unit 101 has a mounting portion 102. The mounting portion 102 is configured to allow mounting of a mounting body 103. The mounting body 103 is inserted relative to the mounting portion 102 and is thus mounted on the mounting portion 102.

[0119] The mounting body 103 is connected to the connecting pin 95 and the supply pin 96 by being mounted on the mounting part 102. The mounting body 103 can be replaced, for example, by pulling out the surface 21. The mounting body 103 can be replaced by opening the opening cover 23.

[0120] The mounting body 103 has a waste liquid chamber 104 and a moisturizing liquid chamber 105. The waste liquid chamber 104 is a space for collecting waste liquid. The waste liquid chamber 104 is connected to the connecting pin 95. That is, the waste liquid chamber 104 is connected to the fifth maintenance flow channel 78. The moisturizing liquid chamber 105 is a space for collecting moisturizing liquid. In this example, the moisturizing liquid chamber 105 collects a moisturizing liquid bag 106. The moisturizing liquid bag 106 is a bag for collecting moisturizing liquid. The moisturizing liquid bag 106 is connected to the supply pin 96. That is, the moisturizing liquid bag 106 is connected to the third maintenance flow channel 76.

[0121] like Figure 12 As shown, the liquid dispensing device 11 includes a mounting and fixing member 107 as an example of a fixing component. The mounting and fixing member 107 fixes the mounting unit 101 relative to the housing 12. The mounting and fixing member 107 is, for example, mounted on the mounting portion 102. Thus, the mounting unit 101 is fixed relative to the housing 12. When the mounting and fixing member 107 is removed from the mounting unit 101, the mounting unit 101 can be removed from the housing 12. The mounting unit 101 can be removed through the opening 25.

[0122] like Figure 6 As shown, the liquid ejection device 11 includes a cover unit 111. The cover unit 111 is a unit for maintaining the head 32.

[0123] The cover unit 111 has one or more covers 112. The covers 112 contact the head 32 in a manner that covers the nozzle 33. The covers 112 cover the nozzle 33 by contacting the nozzle surface 34. In this example, the situation in which the covers 112 cover the nozzle 33 is referred to as capping.

[0124] The cover 112 moisturizes the nozzle 33 by pressing it shut. Furthermore, the cover 112 collects waste liquid from the head 32. The cover 112 collects, for example, waste liquid generated from cleaning and waste liquid generated from rinsing. Thus, the cover 112 maintains the head 32.

[0125] The cover 112 can be moved to a position that contacts the head 32 and a position that separates from the head 32. When the head 32 is not being printed, the cover 112 is moved to a position that contacts the head 32. The position that contacts the head 32 is, for example, the position between the head 32 and the conveyor belt 16. When the head 32 is being printed, the cover 112 is moved to a position that separates from the head 32.

[0126] The cover unit 111 has a moisture-permeable membrane. Within the cover unit 111, a cover membrane 113 serves as the moisture-permeable membrane. The cover membrane 113 is located within the cover 112. The cover membrane 113 separates the interior of the cover 112 into a waste liquid space 114 and a moisturizing liquid space 115.

[0127] Waste liquid space 114 is a space for receiving waste liquid from nozzle 32. Moisturizing liquid space 115 is a space for holding moisturizing liquid. By utilizing the moisturizing liquid that has vaporized in moisturizing liquid space 115 to fill waste liquid space 114 through cover membrane 113, nozzle 33 is moisturized.

[0128] The cover unit 111 has a first cover flow channel 116, a second cover flow channel 117, and a third cover flow channel 118. The first cover flow channel 116, the second cover flow channel 117, and the third cover flow channel 118 are mainly flow channels for liquid flow. The first cover flow channel 116, the second cover flow channel 117, and the third cover flow channel 118 are connected to the maintenance unit 71.

[0129] The first cover channel 116, the second cover channel 117, and the third cover channel 118 each have a cover channel portion 119. The cover channel portion 119 includes, for example, a flexible hose. The cover channel portion 119 may include a rigid conduit or a channel formed by a groove engraved on a plate.

[0130] The first cover flow channel 116 extends from the cover 112. Specifically, the first cover flow channel 116 extends from the waste liquid space 114. The first cover flow channel 116 is a flow channel connecting the cover 112 to the maintenance unit 71.

[0131] The second cover flow channel 117 extends from the cover 112. Specifically, the second cover flow channel 117 extends from the moisturizing liquid space 115. The second cover flow channel 117 is a flow channel connecting the cover 112 to the maintenance unit 71.

[0132] The third cover flow channel 118 extends from the cover 112. Specifically, the third cover flow channel 118 extends from the moisturizing liquid space 115. The third cover flow channel 118 is a flow channel connecting the cover 112 to the maintenance unit 71.

[0133] like Figure 13 , Figure 14 as well as Figure 15 As shown, the cover unit 111 has a discharge component 121. The discharge component 121 is a component that discharges liquid, i.e., waste liquid or moisturizing liquid, that leaks out of the cover unit 111 into the maintenance tray 92. The discharge component 121 is, for example, a frame extending from the cover 112 toward the maintenance tray 92. The waste liquid or moisturizing liquid leaking out of the cover unit 111 flows along the discharge component 121, thereby flowing from the cover unit 111 into the maintenance tray 92.

[0134] like Figure 6 As shown, the liquid dispensing device 11 includes a wiping unit 131. The wiping unit 131 is a unit for maintaining the head 32.

[0135] The wiping unit 131 includes a wiping section 132. The wiping section 132 wipes the nozzle surface 34 by contacting it. Thus, the wiping section 132 removes liquid adhering to the nozzle surface 34. The wiping section 132 is, for example, a rubber scraper. The wiping section 132 wipes the nozzle surface 34 by moving while in contact with it. In this example, the wiping of the nozzle surface 34 by the wiping section 132 is referred to as brushing.

[0136] The wiping unit 131 includes a cleaner 133. The cleaner 133 is a component that cleans the wiping section 132. When the wiping section 132 is wiped, liquid adheres to it. The cleaner 133 recovers the liquid adhering to the wiping section 132. Thus, the wiping section 132 can be wiped without any liquid adhering to it. The cleaner 133, for example, stores the liquid as waste by recovering it from the wiping section 132.

[0137] The wiping unit 131 has a wiping channel 134. The wiping channel 134 is a channel for the main flow of liquid. The wiping channel 134 is connected to the maintenance unit 71.

[0138] The wiping channel 134 has a wiping channel portion 135. The wiping channel portion 135 includes, for example, a flexible hose. The wiping channel portion 135 may include either a rigid conduit or a channel formed by grooves etched into a plate.

[0139] The wiping channel 134 extends, for example, from the wiping section 132. The wiping channel 134 is a channel connecting the wiping section 132 to the maintenance unit 71. Waste liquid wiped by the wiping section 132 flows through the wiping channel 134. The wiping channel 134 may also extend from the cleaner 133. In this case, waste liquid recovered by the cleaner 133 flows through the wiping channel 134.

[0140] like Figure 13 , Figure 14 as well as Figure 15 As shown, the wiping unit 131 has a guide member 136. The guide member 136 is a component that guides liquid leaking from the wiping unit 131 into the maintenance tray 92. The liquid leaking from the wiping unit 131 includes, for example, liquid flowing from the wiping section 132, liquid splattered when the wiping section 132 wipes the nozzle surface 34, liquid leaking from the cleaner 133, etc. The guide member 136 is a frame extending from, for example, the cleaner 133 and the wiping section 132 toward the maintenance tray 92. The liquid leaking from the wiping unit 131 flows along the guide member 136, thereby flowing from the wiping unit 131 to the maintenance tray 92.

[0141] like Figure 6 As shown, the liquid dispensing device 11 includes a selector unit 141. The selector unit 141 is configured to select which of the supply unit 41 and the maintenance unit 71 should be opened to the atmosphere. That is, the selector unit 141 can open the supply unit 41 to the atmosphere or open the maintenance unit 71 to the atmosphere.

[0142] Selector unit 141 has selector valve 142. Selector valve 142 is connected to supply unit 41 and maintenance unit 71. By opening and closing selector valve 142, the unit in supply unit 41 and maintenance unit 71 that is open to the atmosphere is selected.

[0143] Selector unit 141 includes a pressure reducing pump 143. The pressure reducing pump 143 reduces pressure on other units connected to selector unit 141. For example, the pressure reducing pump 143 reduces pressure on supply unit 41. For example, the pressure reducing pump 143 reduces pressure on maintenance unit 71.

[0144] Selector unit 141 has a pressure sensor 144. Pressure sensor 144 detects the pressure inside selector valve 142. Selector unit 141 controls selector valve 142 and pressure reducing pump 143 based on the detection result of pressure sensor 144.

[0145] like Figure 16 As shown, the selector unit 141 has a support frame 145 that supports the selector valve 142. In this example, the selector valve 142 and the pressure reducing pump 143 are mounted on the support frame 145.

[0146] In the liquid dispensing device 11, a selector fixing member 146 is provided as an example of a fixing component. The selector fixing member 146 fixes the selector unit 141 relative to the housing 12. The selector fixing member 146 is mounted on the support frame 145, for example. Thus, the selector unit 141 is fixed relative to the housing 12. When the selector fixing member 146 is removed, the selector unit 141 can be removed from the housing 12. The selector unit 141 can be removed through the opening 25.

[0147] like Figure 6 As shown, the liquid dispensing device 11 has one or more connecting channels. A connecting channel is a channel that connects two of the following units: the supply unit 41, the maintenance unit 71, and the selector unit 141. In this example, the connecting channels include a channel connecting the supply unit 41 and the selector unit 141, and a channel connecting the maintenance unit 71 and the selector unit 141.

[0148] The liquid ejection device 11 includes a first connecting channel 151, a second connecting channel 152, a third connecting channel 153, and a fourth connecting channel 154. The first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 are gas flow channels. The first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 are connected to a selector valve 142. The first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 can be freely opened and closed via the selector valve 142.

[0149] The first connecting channel 151 connects the selector unit 141 and the supply unit 41. The second connecting channel 152 connects the selector unit 141 and the supply unit 41. The third connecting channel 153 connects the selector unit 141 and the supply unit 41. The fourth connecting channel 154 connects the selector unit 141 and the maintenance unit 71. The selector unit 141 opens to the atmosphere in both directions through the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154.

[0150] The first connecting channel 151, the second connecting channel 152, and the third connecting channel 153 each have a first channel portion 155. The first channel portion 155 includes, for example, a flexible hose. The first channel portion 155 may include a rigid conduit or a channel formed by a groove engraved on a plate.

[0151] The first connecting channel 151, the second connecting channel 152, and the third connecting channel 153 have joints. The first connecting channel 151, the second connecting channel 152, and the third connecting channel 153 share a common first connecting joint 156. The first connecting joint 156 is located at one end of the first channel portion 155. The first connecting joint 156 constitutes one end of the first connecting channel 151, one end of the second connecting channel 152, and one end of the third connecting channel 153. The first connecting channel 151, the second connecting channel 152, and the third connecting channel 153 may also each have other joints.

[0152] The first connecting connector 156 is connected to the second supply connector 56. Thus, the first connecting channel 151 is connected to the third supply channel 50. The second connecting channel 152 is connected to the fourth supply channel 51. The third connecting channel 153 is connected to the fifth supply channel 52. Therefore, the first connecting channel 151 connects to the selector valve 142 and the first tank 45. The second connecting channel 152 connects to the selector valve 142 and the second tank 46. The third connecting channel 153 connects to the selector valve 142 and the pressurization unit 57.

[0153] The first flow channel portion 155 can also be directly connected to the second supply connector 56. The gas flow channel portion 55 can also be directly connected to the first connection connector 156. The connection of the first connecting flow channel 151, the second connecting flow channel 152, and the third connecting flow channel 153 relative to the supply unit 41 is simplified through the second supply connector 56 and the first connection connector 156. That is, the connection between the supply unit 41 and the selector unit 141 is simplified through the second supply connector 56 and the first connection connector 156.

[0154] When the first connection channel 151 is opened via selector valve 142, the first tank 45 is opened to the atmosphere. When the second connection channel 152 is opened via selector valve 142, the second tank 46 is opened to the atmosphere. When the third connection channel 153 is opened via selector valve 142, the pressurization section 57 is opened to the atmosphere.

[0155] When the pressure reducing pump 143 is activated, the pressure in the first tank 45 is reduced through the first connecting channel 151. As a result, for example, liquid flows from the head 32 to the first tank 45 through the first supply channel 48. When the pressure reducing pump 143 is activated, the pressure in the second tank 46 is reduced through the second connecting channel 152. As a result, for example, liquid flows from the first tank 45 to the second tank 46 through the tank valve 47. When the pressure reducing pump 143 is activated, the pressure in the pressurizing section 57 is reduced through the third connecting channel 153. Thereafter, when the pressurizing section 57 is opened to the atmosphere through the third connecting channel 153, the pressurizing section 57 pressurizes the liquid in the head 32. In this way, the pressure reducing pump 143 activates the pressurizing section 57.

[0156] The fourth connecting channel 154 has a second channel portion 157. The second channel portion 157 includes, for example, a flexible hose. The second channel portion 157 may include either a rigid conduit or a channel formed by a groove engraved on a plate.

[0157] The fourth connecting channel 154 has a connector. The fourth connecting channel 154 has a second connecting connector 158. The second connecting connector 158 is located at one end of the second channel portion 157. The second connecting connector 158 constitutes one end of the fourth connecting channel 154.

[0158] The second connection connector 158 is connected to the maintenance connector 80. Thus, the fourth connection channel 154 is connected to the first maintenance channel 74. Therefore, the fourth connection channel 154 connects the selector valve 142 and the humidifier tank 72.

[0159] The second flow channel portion 157 can also be directly connected to the maintenance connector 80. The maintenance flow channel portion 79 can also be directly connected to the second connection connector 158. The maintenance connector 80 and the second connection connector 158 simplify the connection of the fourth connection flow channel 154 relative to the maintenance unit 71. That is, the maintenance connector 80 and the second connection connector 158 simplify the connection between the maintenance unit 71 and the selector unit 141.

[0160] When the fourth connection channel 154 is opened by the selector valve 142, the humectant reservoir 72 is opened to the atmosphere. When the pressure reducing pump 143 is driven, the pressure in the humectant reservoir 72 is reduced by the fourth connection channel 154. Thus, for example, humectant flows from the cap 112 into the humectant reservoir 72 through the second maintenance channel 75.

[0161] The first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 are not limited to having connectors at one end, but may also have connectors at both ends. In this case, the connection of the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 relative to the selector unit 141 becomes simple. Therefore, the connection of the selector unit 141 to other units becomes simple.

[0162] The liquid ejection device 11 includes a first relay channel 161, a second relay channel 162, a third relay channel 163, and a fourth relay channel 164. The first relay channel 161, the second relay channel 162, the third relay channel 163, and the fourth relay channel 164 are the main flow channels for the liquid.

[0163] The first relay flow channel 161 is a flow channel connecting the maintenance unit 71 and the wiping unit 131. The second relay flow channel 162, the third relay flow channel 163, and the fourth relay flow channel 164 are flow channels connecting the maintenance unit 71 and the cover unit 111.

[0164] The first relay channel 161, the second relay channel 162, the third relay channel 163, and the fourth relay channel 164 each have a relay channel portion 165. The relay channel portion 165 includes, for example, a flexible hose. The relay channel portion 165 may include a rigid conduit or a channel formed by a groove engraved on a plate.

[0165] The first relay channel 161, the second relay channel 162, the third relay channel 163, and the fourth relay channel 164 have joints. The first relay channel 161, the second relay channel 162, the third relay channel 163, and the fourth relay channel 164 have joints at both ends.

[0166] The first relay channel 161, the second relay channel 162, the third relay channel 163, and the fourth relay channel 164 share a common second connecting connector 158. That is, the first relay channel 161, the second relay channel 162, the third relay channel 163, and the fourth relay channel 164 share a fourth connecting channel 154 and a second connecting connector 158. The first relay channel 161, the second relay channel 162, the third relay channel 163, and the fourth relay channel 164 share a common relay connector 166.

[0167] The second connecting connector 158 is located at one end of the first relay channel 161, and the relay connector 166 is located at the other end of the first relay channel 161. The second connecting connector 158 is located at one end of the second relay channel 162, and the relay connector 166 is located at the other end of the second relay channel 162. The second connecting connector 158 is located at one end of the third relay channel 163, and the relay connector 166 is located at the other end of the third relay channel 163. The second connecting connector 158 is located at one end of the fourth relay channel 164, and the relay connector 166 is located at the other end of the fourth relay channel 164.

[0168] The second connecting connector 158 constitutes one end of the first relay channel 161, one end of the second relay channel 162, one end of the third relay channel 163, and one end of the fourth relay channel 164. The relay connector 166 constitutes the other end of the first relay channel 161, the other end of the second relay channel 162, the other end of the third relay channel 163, and the other end of the fourth relay channel 164. The first relay channel 161, the second relay channel 162, the third relay channel 163, and the fourth relay channel 164 may also each have other connectors.

[0169] The second connecting connector 158 is connected to the maintenance connector 80. Thus, the first relay flow channel 161 is connected to the fifth maintenance flow channel 78. The second relay flow channel 162 is connected to the fourth maintenance flow channel 77. The third relay flow channel 163 is connected to the second maintenance flow channel 75. The fourth relay flow channel 164 is connected to the third maintenance flow channel 76.

[0170] The first cover flow channel 116, the second cover flow channel 117, the third cover flow channel 118, and the wiping flow channel 134 are connected to the relay connector 166. Thus, the first relay flow channel 161 is connected to the wiping flow channel 134. The second relay flow channel 162 is connected to the first cover flow channel 116. The third relay flow channel 163 is connected to the second cover flow channel 117. The fourth relay flow channel 164 is connected to the third cover flow channel 118.

[0171] The first relay channel 161 relays the fifth maintenance channel 78 and the wiping channel 134. That is, the first relay channel 161 connects the maintenance unit 71 and the wiping unit 131. The maintenance unit 71 and the wiping unit 131 are connected via the first relay channel 161. The first relay channel 161 connects the wiping part 132 and the mounting body 103.

[0172] The second relay channel 162 relays the fourth maintenance channel 77 and the first cover channel 116. Specifically, the second relay channel 162 connects the maintenance unit 71 and the cover unit 111. The maintenance unit 71 and the cover unit 111 are connected via the second relay channel 162. The second relay channel 162 also connects the cover 112 and the buffer tank 73.

[0173] The third relay channel 163 relays the second maintenance channel 75 and the second cover channel 117. That is, the third relay channel 163 connects the maintenance unit 71 and the cover unit 111. The maintenance unit 71 and the cover unit 111 are connected via the third relay channel 163. The third relay channel 163 connects the cover 112 and the humidifier tank 72.

[0174] The fourth relay channel 164 relays the third maintenance channel 76 and the third cover channel 118. That is, the fourth relay channel 164 connects the maintenance unit 71 and the cover unit 111. The maintenance unit 71 and the cover unit 111 are connected via the fourth relay channel 164. The fourth relay channel 164 connects the cover 112 and the humidifier tank 72. The fourth relay channel 164 connects the cover 112 and the mounting body 103.

[0175] The relay flow channel portion 165 can also be directly connected to the maintenance connector 80. The maintenance flow channel portion 79 can also be directly connected to the second connection connector 158. The maintenance connector 80 and the second connection connector 158 simplify the assembly and disassembly of the maintenance unit 71 and the selector unit 141. Furthermore, the maintenance connector 80 and the second connection connector 158 simplify the assembly and disassembly of the maintenance unit 71 and the cover unit 111. Additionally, the maintenance connector 80 and the second connection connector 158 simplify the assembly and disassembly of the maintenance unit 71 and the wiping unit 131.

[0176] The cover flow channel portion 119 can also be directly connected to the maintenance connector 80. That is, the maintenance unit 71 can also be directly connected to the cover unit 111. Furthermore, the wiping flow channel portion 135 can also be directly connected to the maintenance connector 80. That is, the maintenance unit 71 can also be directly connected to the wiping unit 131. In this case, a relay flow channel is not required.

[0177] like Figure 16 As shown, in this example, two second connection channels 152 extend from the selector valve 142. This is because one second connection channel 152 corresponds to two liquid reservoirs 43. That is, one second connection channel 152 is connected to two second tanks 46. The first connection channel 151 is connected to four first tanks 45.

[0178] like Figure 17 As shown, in this example, the second connector 158 and the relay connector 166 are connected via six relay channel portions 165. Three of the six relay channel portions 165 respectively constitute second relay channels 162. That is, in this example, the selector unit 141 has three second relay channels 162. Therefore, in this example, the cover unit 111 has three first cover channels 116. The three first cover channels 116 can be connected to one cover 112 or to other covers 112 respectively. The remaining three relay channel portions 165 respectively constitute a first relay channel 161, a third relay channel 163, and a fourth relay channel 164.

[0179] Next, the replacement of the unit will be explained.

[0180] Supply unit 41, maintenance unit 71, and selector unit 141 can be replaced through the opening 25. That is, supply unit 41, maintenance unit 71, and selector unit 141 can be replaced through a single opening. By converging the openings through which supply unit 41, maintenance unit 71, and selector unit 141 are removed into the opening 25, the efficiency of the personnel replacing the units is improved. In this example, in addition to supply unit 41, maintenance unit 71, and selector unit 141, installation unit 101 can also be replaced through the opening 25. After removing a unit from the opening 25, the personnel replace the unit by inserting a new unit through the opening 25.

[0181] like Figure 18As shown, the supply unit 41, maintenance unit 71, and selector unit 141 are exposed from the opening 25. When viewed from a position opposite to the opening surface 22, the supply unit 41 and selector unit 141 are arranged side-by-side. The supply unit 41 is also arranged side-by-side with the maintenance unit 71, and is positioned above the maintenance unit 71. The maintenance unit 71 is positioned below the selector unit 141.

[0182] When viewed from the opening 25 opposite to the opening surface 22, the supply unit 41, maintenance unit 71, and selector unit 141 are located in non-overlapping positions. Therefore, when one of the supply unit 41, maintenance unit 71, and selector unit 141 is removed from the opening 25, that unit will not interfere with the other units. For example, when the supply unit 41 is removed from the opening 25, the supply unit 41 will not interfere with the maintenance unit 71 and the selector unit 141. Thus, it is not necessary to remove other units in order to remove one unit. Therefore, the supply unit 41, maintenance unit 71, and selector unit 141 can be removed from the opening 25 independently. Therefore, it is easy to replace the supply unit 41, maintenance unit 71, and selector unit 141.

[0183] The mounting unit 101 protrudes from the opening 25. When viewed from a position opposite to the opening surface 22, the mounting unit 101 and the maintenance unit 71 are arranged side by side. The mounting unit 101 is located below the supply unit 41.

[0184] When viewed from a position opposite to the opening surface 22, the mounting unit 101 is positioned where it does not overlap with the supply unit 41, maintenance unit 71, and selector unit 141. Therefore, when the mounting unit 101 is removed from the opening 25, it does not interfere with the supply unit 41, maintenance unit 71, and selector unit 141. Thus, the supply unit 41, maintenance unit 71, selector unit 141, and mounting unit 101 can be removed from the opening 25 independently. Therefore, the mounting unit 101, except for the supply unit 41, maintenance unit 71, and selector unit 141, can also be easily replaced.

[0185] One end of the connecting channel is exposed from the outlet 25. When viewed from a position opposite to the opening surface 22, one end of the connecting channel is exposed. For example, one end of the first connecting channel 151, one end of the second connecting channel 152, and one end of the third connecting channel 153 are exposed from the outlet 25. Therefore, it is easy to approach one end of the first connecting channel 151, one end of the second connecting channel 152, and one end of the third connecting channel 153 from the outlet 25. Thus, it is easy to remove the first connecting channel 151, the second connecting channel 152, and the third connecting channel 153 from the supply unit 41 or the selector unit 141.

[0186] The first connecting channel 151, the second connecting channel 152, and the third connecting channel 153 each include a first channel portion 155 that is elastic. Therefore, the first channel portion 155 is deformable. Thus, when a unit is removed from the outlet 25, the first channel portion 155 can be deformed so that the first connecting channel 151, the second connecting channel 152, and the third connecting channel 153 do not interfere with that unit. For example, when the supply unit 41 or the selector unit 141 is removed from the outlet 25, the first channel portion 155 can be deformed so that the first connecting channel 151, the second connecting channel 152, and the third connecting channel 153 do not interfere with that unit.

[0187] One end of the fourth connection channel 154 is exposed from the outlet 25. Therefore, it is easy to access one end of the fourth connection channel 154 from the outlet 25. Thus, it is easy to remove the fourth connection channel 154 from the maintenance unit 71 or the selector unit 141.

[0188] The fourth connecting channel 154 includes a resilient second channel portion 157. Therefore, the second channel portion 157 is deformable. Thus, when a unit is removed from the outlet 25, the second channel portion 157 can be deformed to prevent the fourth connecting channel 154 from interfering with that unit. For example, when the maintenance unit 71 or the selector unit 141 is removed from the outlet 25, the second channel portion 157 can be deformed to prevent the fourth connecting channel 154 from interfering with that unit.

[0189] When the fourth connecting channel 154 is removed from the maintenance unit 71, the second connecting connector 158 can be removed from the maintenance connector 80, and the second channel portion 157 can be removed from the second connecting connector 158.

[0190] In this example, not only one end of the connecting channel is exposed from the outlet 25, but both ends of the connecting channel are also exposed from the outlet 25. Specifically, both ends of the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 are exposed from the outlet 25. Therefore, it is easy to access both ends of the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 from the outlet 25. Thus, it is easy to remove the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 from the unit from the outlet 25.

[0191] Even if the two ends of the connecting channel are removed from the two units through the exposure port 25, thus rendering the first channel portion 155 and the second channel portion 157 inelastic, there is no possibility of interference between the connecting channel and the unit when the unit is removed from the exposure port 25.

[0192] Multiple fixing components are exposed from the opening 25. For example, when viewing the opening 25 from a position opposite to the opening surface 22, multiple fixing components are exposed from the opening 25. Specifically, the supply fixing component 70, the maintenance fixing component 97, and the selector fixing component 146 are exposed from the opening 25. In addition, the mounting fixing component 107 is also exposed from the opening 25.

[0193] In this example, the supply tray 65 is exposed from the opening 25. Therefore, the supply fixing component 70, which is mounted on the supply tray 65, is exposed from the opening 25.

[0194] In this example, the maintenance tray 92 is exposed from the opening 25. Therefore, the maintenance fixing parts 97 mounted on the maintenance tray 92 are exposed from the opening 25.

[0195] In this example, the support frame 145 is exposed from the opening 25. Therefore, the selector fixing part 146, which is mounted on the support frame 145, is exposed from the opening 25.

[0196] In this example, the mounting portion 102 is exposed from the opening 25. Therefore, the mounting fixing member 107, which is mounted on the mounting portion 102, is exposed from the opening 25.

[0197] The supply fixing component 70, maintenance fixing component 97, mounting fixing component 107, and selector fixing component 146 are exposed through the exposure port 25. Therefore, the supply fixing component 70, maintenance fixing component 97, mounting fixing component 107, and selector fixing component 146 can be easily accessed through the exposure port 25. This allows for easy removal of the supply fixing component 70, maintenance fixing component 97, mounting fixing component 107, and selector fixing component 146. Consequently, unit replacement is easy.

[0198] After removing the supply unit 41 through the opening 25, the operator removes the supply fixing component 70. The operator then removes the first supply connector 54 and the head connector 38. The operator further removes the second supply connector 56 and the first connecting connector 156. Thus, the operator can remove the supply unit 41 through the opening 25.

[0199] After removing the maintenance unit 71 through the exposed opening 25, the operator removes the maintenance fixing component 97. The operator then removes the maintenance connector 80 and the second connecting connector 158. The operator further removes the mounting body 103 from the mounting section 102. Thus, the operator can remove the maintenance unit 71 through the exposed opening 25.

[0200] After removing the selector unit 141 through the outlet 25, the operator removes the selector fixing component 146. The operator then removes the first connecting connector 156 and the second supply connector 56. The operator further removes the second flow channel portion 157 from the second connecting connector 158. Thus, the operator can remove the selector unit 141 through the outlet 25. The operator can also remove the selector unit 141 through the outlet 25 by removing the first connecting flow channel 151, the second connecting flow channel 152, the third connecting flow channel 153, and the fourth connecting flow channel 154 from the selector valve 142. The operator can also remove the selector unit 141 through the outlet 25 by removing the second connecting connector 158 and the maintenance connector 80. In this case, the operator may, for example, remove the relay flow channel portion 165 from the second connecting connector 158 or the relay connector 166.

[0201] After removing the mounting unit 101 through the exposed opening 25, the operator removes the mounting fastener 107. The operator then removes the mounting body 103 from the mounting section 102. Thus, the operator can remove the mounting unit 101 through the exposed opening 25.

[0202] like Figure 19As shown, when the supply unit 41, maintenance unit 71, and selector unit 141 are removed, the cover unit 111 is exposed from the opening 25. That is, when the opening 25 is viewed from a position opposite to the opening surface 22, the cover unit 111 is located at a position overlapping with at least one of the supply unit 41, maintenance unit 71, and selector unit 141. When the opening 25 is viewed from a position opposite to the opening surface 22, the cover unit 111 is located further inward than the supply unit 41, maintenance unit 71, and selector unit 141. Therefore, compared to the non-overlapping case, the size expansion of the liquid dispensing device 11 can be suppressed. Furthermore, when the structure of removing the cover unit 111 from the opening 25 is adopted, the cover unit 111 can be approached from the opening 25 by removing the unit of the supply unit 41, maintenance unit 71, and selector unit 141 that overlaps with the cover unit 111 from the opening 25.

[0203] When the supply unit 41, maintenance unit 71, and selector unit 141 are removed, the wiping unit 131 is exposed from the opening 25. That is, when the opening 25 is viewed from a position opposite to the opening surface 22, the wiping unit 131 is located at a position overlapping with at least one of the supply unit 41, maintenance unit 71, and selector unit 141. When the opening 25 is viewed from a position opposite to the opening surface 22, the wiping unit 131 is located further inward than the supply unit 41, maintenance unit 71, and selector unit 141. Therefore, compared to the non-overlapping case, the size of the liquid dispensing device 11 can be suppressed from increasing. Furthermore, when the structure is adopted in which the wiping unit 131 is removed from the opening 25, the wiping unit 131 can be approached from the opening 25 by removing the unit of the supply unit 41, maintenance unit 71, and selector unit 141 that overlaps with the wiping unit 131.

[0204] When viewing the exposed opening 25 from a position opposite to the opening surface 22, the cover unit 111 and the wiping unit 131 are arranged side by side. In this manner, when viewing the exposed opening 25 from a position opposite to the opening surface 22, the cover unit 111 and the wiping unit 131 are positioned without overlapping each other. Therefore, when approaching one of the cover unit 111 or the wiping unit 131 from the exposed opening 25, the other unit will not become an obstruction. Thus, it is possible to approach the cover unit 111 and the wiping unit 131 individually from the exposed opening 25.

[0205] Next, the function and effects of the above-described implementation methods will be explained.

[0206] (1) The opening 25 exposes the supply unit 41, the maintenance unit 71 and the selector unit 141. When the opening 25 is viewed from a position opposite to the opening surface 22, the supply unit 41, the maintenance unit 71 and the selector unit 141 are located in non-overlapping positions.

[0207] According to the above structure, when one of the supply unit 41, maintenance unit 71, and selector unit 141 is removed from the outlet 25, that unit will not interfere with the other units. Therefore, when one unit is removed from the outlet 25, it is not necessary to remove the other units. That is, the supply unit 41, maintenance unit 71, and selector unit 141 can be removed separately from the outlet 25. Therefore, it is easy to replace the units.

[0208] (2) The first connecting channel 151, the second connecting channel 152, and the third connecting channel 153 each include a first channel portion 155 that is flexible. The fourth connecting channel 154 includes a second channel portion 157 that is flexible. One end of the first connecting channel 151, one end of the second connecting channel 152, one end of the third connecting channel 153, and one end of the fourth connecting channel 154 are exposed from the outlet 25.

[0209] According to the above structure, one end of the first connecting channel 151, one end of the second connecting channel 152, one end of the third connecting channel 153, and one end of the fourth connecting channel 154 can be easily accessed through the exposed opening 25. Therefore, for example, the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 can be easily removed from a single unit. Furthermore, since the first channel portion 155 and the second channel portion 157 are elastic, they can be deformed. Thus, when a unit is removed from the exposed opening 25, the first channel portion 155 and the second channel portion 157 can be deformed so that the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 do not interfere with the supply unit 41, the maintenance unit 71, and the selector unit 141. Therefore, unit replacement is easy.

[0210] (3) The two ends of the first connecting channel 151, the two ends of the second connecting channel 152, the two ends of the third connecting channel 153 and the two ends of the fourth connecting channel 154 are exposed from the exposure port 25.

[0211] According to the above structure, the two ends of the first connecting channel 151, the two ends of the second connecting channel 152, the two ends of the third connecting channel 153, and the two ends of the fourth connecting channel 154 can be easily accessed through the exposure port 25. Therefore, for example, the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 can be easily removed from the two units. By removing the two ends of the first connecting channel 151, the two ends of the second connecting channel 152, the two ends of the third connecting channel 153, and the two ends of the fourth connecting channel 154 from the unit, the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 can be removed from the exposure port 25. Thus, when one unit is removed from the exposure port 25, the first connecting channel 151, the second connecting channel 152, the third connecting channel 153, and the fourth connecting channel 154 will not interfere with the supply unit 41, the maintenance unit 71, and the selector unit 141. Therefore, the unit is easy to replace.

[0212] (4) When the exposed opening 25 is viewed from a position opposite to the opening surface 22, the cover unit 111 is located at a position that overlaps with at least one of the supply unit 41, the maintenance unit 71, and the selector unit 141.

[0213] According to the above structure, compared to the case where the cover unit 111 does not overlap with at least one of the supply unit 41, maintenance unit 71, and selector unit 141, the size expansion of the liquid dispensing device 11 can be suppressed. Furthermore, in the case of adopting a structure where the cover unit 111 is removed from the exposure opening 25, the cover unit 111 can be accessed from the exposure opening 25 by removing the unit overlapping with the cover unit 111. That is, the cover unit 111 can be accessed not only through the exposure opening 25, but also through the supply unit 41, maintenance unit 71, and selector unit 141. In this way, the openings that allow access to the supply unit 41, maintenance unit 71, and selector unit 141, and the opening that allows access to the cover unit 111, are combined into the exposure opening 25. Therefore, the workability in the case of replacing or repairing the unit is improved.

[0214] (5) When the exposed opening 25 is viewed from a position opposite to the opening surface 22, the wiping unit 131 is located at a position that overlaps with at least one of the supply unit 41, the maintenance unit 71 and the selector unit 141.

[0215] According to the above structure, compared to the case where the wiping unit 131 does not overlap with at least one of the supply unit 41, maintenance unit 71, and selector unit 141, the size expansion of the liquid dispensing device 11 can be suppressed. Furthermore, when the wiping unit 131 is removed from the opening 25, the wiping unit 131 can be accessed from the opening 25 by removing the unit overlapping with it. That is, through the opening 25, the wiping unit 131 can be accessed not only with the supply unit 41, maintenance unit 71, and selector unit 141, but also with the wiping unit 131. In this way, the openings that allow access to the supply unit 41, maintenance unit 71, and selector unit 141, and the opening that allows access to the wiping unit 131, are combined into the opening 25. Therefore, the workability when replacing or repairing the unit is improved.

[0216] (6) When viewing the exposed opening 25 from a position opposite to the opening surface 22, the cover unit 111 and the wiping unit 131 are located in a position where they do not overlap.

[0217] According to the above structure, the cover unit 111 and the wiping unit 131 can be accessed separately from the exposed opening 25. Therefore, the workability is good when replacing or repairing the cover unit 111 and the wiping unit 131.

[0218] (7) The opening 25 exposes the mounting unit 101. When viewed from a position opposite to the opening surface 22, the opening 25 is located in a position that does not overlap with the supply unit 41, the maintenance unit 71 and the selector unit 141.

[0219] According to the above structure, when the mounting unit 101 is removed from the opening 25, the mounting unit 101 will not interfere with the supply unit 41, the maintenance unit 71, and the selector unit 141. That is, the supply unit 41, the maintenance unit 71, the selector unit 141, and the mounting unit 101 can be removed separately from the opening 25. Therefore, it is easy to replace the units.

[0220] (8) The supply fixing component 70, maintenance fixing component 97, and selector fixing component 146 are exposed from the exposure port 25. In this example, the installation fixing component 107 is further exposed from the exposure port 25.

[0221] Based on the above structure, the fixing components can be easily removed through the exposed opening 25. Therefore, the workability is good when replacing the supply unit 41, maintenance unit 71, and selector unit 141 through the exposed opening 25. In this example, the workability is also good when replacing the mounting unit 101.

[0222] (9) The supply unit 41 has a supply tray 65. The supply tray 65 is fixed relative to the basket 12 by a supply fixing member 70. The supply tray 65 protrudes from the opening 25. The supply fixing member 70 protrudes from the opening 25. According to the above structure, the supply fixing member 70 can be easily removed through the opening 25. Therefore, when replacing the supply unit 41 through the opening 25, the workability is better.

[0223] (10) The maintenance unit 71 has a maintenance tray 92. The maintenance tray 92 is secured relative to the housing 12 by a maintenance fixing member 97. The maintenance tray 92 is exposed from the opening 25. The maintenance fixing member 97 is exposed from the opening 25.

[0224] Based on the above structure, the maintenance fixing component 97 can be easily removed through the exposed opening 25. Therefore, the workability is good when replacing the maintenance unit 71 through the exposed opening 25.

[0225] (11) The supply inspection unit 66 is located in the supply tray 65. The maintenance inspection unit 93 is located in the maintenance tray 92.

[0226] According to the above structure, the supply detection unit 66 detects the liquid in the supply tray 65. The maintenance detection unit 93 detects the waste liquid in the maintenance tray 92. The maintenance detection unit 93 also detects the moisturizing liquid in the maintenance tray 92. Thus, liquid leakage from the liquid dispensing device 11 can be detected.

[0227] This embodiment can be modified and implemented in the following ways. This embodiment and the following modifications can be combined and implemented with each other within the scope of technical inconsistency.

[0228] In the liquid dispensing device 11, a connecting channel may be provided to connect the supply unit 41 and the maintenance unit 71. For example, the liquid dispensing device 11 may also include a connecting channel that directly supplies liquid from the supply unit 41 to the maintenance unit 71 as waste liquid. In this case, it is preferable that at least one end of the connecting channel connecting the supply unit 41 and the maintenance unit 71 is exposed from the outlet 25.

[0229] The liquid ejected by head 32 is not limited to ink, but can also be, for example, a liquid containing particles of functional materials dispersed or mixed in the liquid. For example, head 32 can also eject a liquid containing, in a dispersed or dissolved form, materials such as electrode materials or image materials used in the manufacture of liquid crystal displays, electroluminescent displays, and surface-emitting displays.

[0230] The following text describes the technical ideas and effects learned based on the above-described embodiments and modifications.

[0231] (A) A liquid ejection device comprises: a head having a nozzle for ejecting liquid; a supply unit for supplying liquid to the head; a maintenance unit for maintaining the head; a selector unit for selecting one of the supply unit and the maintenance unit to be open to the atmosphere; and a housing for housing the supply unit, the maintenance unit, and the selector unit, the housing having an opening with an exposed opening and a cover for blocking the exposed opening, the exposed opening exposing the supply unit, the maintenance unit, and the selector unit, wherein, when viewed from a position opposite to the opening, the supply unit, the maintenance unit, and the selector unit are located in non-overlapping positions.

[0232] According to the above structure, when one of the supply unit, maintenance unit, and selector unit is removed from the outlet, that unit will not interfere with the other units. Therefore, when one unit is removed from the outlet, there is no need to remove the other units. That is, the supply unit, maintenance unit, and selector unit can be removed individually from the outlet. Therefore, unit replacement is easy.

[0233] (B) In the above-mentioned liquid ejection device, it is also possible to adopt the following method, that is, to have a connecting channel for connecting two of the supply unit, the maintenance unit and the selector unit, the connecting channel including a flexible channel portion, one end of the connecting channel being exposed from the outlet.

[0234] According to the above structure, one end of the connecting channel is easily accessible through the exposed opening. Therefore, the connecting channel can be easily removed from a unit. Since the channel portion is elastic, it can be deformed. Thus, when a unit is removed from the exposed opening, the channel portion can be deformed so that the connecting channel does not interfere with the supply unit, maintenance unit, and selector unit. Therefore, unit replacement is easy.

[0235] (C) In the above-mentioned liquid ejection device, it is also possible to adopt the following method, that is, to have a connecting channel for connecting two of the supply unit, the maintenance unit and the selector unit, with both ends of the connecting channel exposed from the outlet.

[0236] Based on the above structure, the two ends of the connecting channel can be easily accessed through the exposed opening. Therefore, the connecting channel can be easily detached from both units. The connecting channel can be removed from the exposed opening by detaching both ends from the unit. Thus, when removing one unit from the exposed opening, the connecting channel will not interfere with the supply unit, maintenance unit, or selector unit. Therefore, unit replacement is easy.

[0237] (D) In ​​the above-described liquid ejection device, a cover unit may be provided that contacts the head in a manner that covers the nozzle, and when the exposed opening is viewed from a position opposite to the opening, the cover unit is located at a position that overlaps with at least one of the supply unit, the maintenance unit, and the selector unit.

[0238] According to the above structure, compared to the case where the cover unit does not overlap with at least one of the supply unit, maintenance unit, and selector unit, the size expansion of the liquid dispensing device can be suppressed. Furthermore, in the case of a structure where the cover unit is removed from the opening, the cover unit can be accessed from the opening by removing the unit overlapping with it. That is, through the opening, the cover unit can be accessed not only in addition to the supply unit, maintenance unit, and selector unit, but also in addition to the cover unit. In this way, the openings for accessing the supply unit, maintenance unit, and selector unit, and the opening for accessing the cover unit, are combined into an opening. Therefore, the workability when replacing or repairing units is improved.

[0239] (E) In the above-described liquid dispensing device, it may also be provided with a wiping unit that wipes the nozzle surface in which the nozzle is opened in the head, and when the exposed opening is viewed from a position opposite to the opening surface, the wiping unit is located at a position that overlaps with at least one of the supply unit, the maintenance unit and the selector unit.

[0240] According to the above structure, compared to the case where the wiping unit does not overlap with at least one of the supply unit, maintenance unit, and selector unit, the size of the liquid dispensing device can be suppressed from increasing. Furthermore, in the case of a structure where the wiping unit is removed from the opening, the wiping unit can be accessed from the opening by removing the unit overlapping with it. That is, through the opening, the wiping unit can be accessed not only from the supply unit, maintenance unit, and selector unit, but also from the wiping unit. In this way, the openings for accessing the supply unit, maintenance unit, and selector unit, and the opening for accessing the wiping unit, are combined into an opening. Therefore, the workability when replacing or repairing the unit is improved.

[0241] (F) In the above-described liquid ejection device, the cover unit and the wiping unit are located in a position that does not overlap when the exposed opening is viewed from a position opposite to the opening.

[0242] Based on the above structure, the cover unit and the wiping unit can be accessed separately from the exposed opening. Therefore, the workability is improved when replacing or repairing the cover unit and the wiping unit.

[0243] (G) In the above-described liquid ejection device, it may also be provided with an installation unit configured to install a mounting body for collecting liquid discharged from the head as waste liquid, the protrusion exposing the installation unit, and the installation unit being located in a position that does not overlap with the supply unit, the maintenance unit, and the selector unit when viewed from a position facing the protrusion.

[0244] According to the above structure, when the installation unit is removed from the exposed port, the installation unit will not interfere with the supply unit, maintenance unit, and selector unit. That is, the supply unit, maintenance unit, selector unit, and installation unit can be removed separately from the exposed port. Therefore, it is easy to replace the units.

[0245] (H) In the above-described liquid ejection device, it is also possible to use a plurality of fixing components that fix the supply unit, the maintenance unit and the selector unit relative to the housing, and the plurality of fixing components protrude from the outlet.

[0246] Based on the above structure, the fixed components can be easily removed through the exposed opening. Therefore, the workability is good when replacing the supply unit, maintenance unit, and selector unit through the exposed opening.

[0247] (I) In the above-described liquid dispensing device, it is also possible to include a fixing member that secures the supply unit relative to the basket. The supply unit has a tray, which is fixed relative to the basket by the fixing member and protrudes from the opening. The fixing member also protrudes from the opening. With this structure, the fixing member can be easily removed through the opening. Therefore, when replacing the supply unit through the opening, the workability is improved.

[0248] (J) In the above-described liquid dispensing device, it is also possible to include a fixing member that secures the maintenance unit relative to the housing, the maintenance unit having a tray, the tray being secured relative to the housing by the fixing member and protruding from the opening, and the fixing member protruding from the opening. With this structure, the fixing member can be easily removed through the opening. Therefore, when replacing the maintenance unit through the opening, the workability is improved.

[0249] (K) In the above-described liquid dispensing device, a detection unit located in the tray can also be included to detect the liquid. With this structure, the detection unit detects the liquid in the tray. Thus, liquid leakage from the liquid dispensing device can be detected.

[0250] Symbol Explanation

[0251] 11…Liquid ejection device; 12…Basket; 13…Collection section; 14…Conveying path; 15…Conveying section; 16…Conveyor belt; 17…First pulley; 18…Second pulley; 19…Stacker; 21…Pull-out surface; 22…Opening surface; 23…Open cover; 24…Exposed cover; 25…Exposed opening; 31…Head unit; 32…Head; 33…Nozzle; 34…Nozzle surface; 35…First head channel; 36…Second head channel; 37…Head channel section; 38…Head connector; 41…Supply unit; 42…Retainer; 43…Liquid collection body; 44…Collection body valve; 45…First tank; 46…Second tank; 47…Tank valve; 48…First supply channel; 49…Second supply channel; 50…Third supply channel; 51…Fourth supply channel 52…Fifth supply channel; 53…Liquid channel section; 54…First supply connector; 55…Gas channel section; 56…Second supply connector; 57…Pressure section; 58…Liquid volume sensor; 59…Filter; 60…First supply valve; 61…Second supply valve; 62…Third supply valve; 63…First supply membrane; 64…Second supply membrane; 65…Supply tray; 66…Supply detection section; 67…Device tray; 68…Connection section; 69…Leakage detection section; 70…Supply fixing component; 71…Maintenance unit; 72…Moisturizing liquid tank; 73…Buffer tank; 74…First maintenance channel; 75…Second maintenance channel; 76…Third maintenance channel; 77…Fourth maintenance channel; 78…Fifth maintenance channel; 79… 80…Maintenance connector; 81…Bifurcation section; 82…Bifurcation section; 83…Moisturizing liquid volume sensor; 84…Maintenance membrane; 85…First maintenance valve; 86…Second maintenance valve; 87…Third maintenance valve; 88…Fourth maintenance valve; 89…First maintenance pump; 90…Second maintenance pump; 91…Third maintenance pump; 92…Maintenance tray; 93…Maintenance detection unit; 94…Connector; 95…Connecting pin; 96…Supply pin; 97…Maintenance fixing component; 101…Mounting unit; 102…Mounting part; 103…Mounting body; 104…Waste liquid chamber; 105…Moisturizing liquid chamber; 106…Moisturizing liquid bag; 107…Mounting fixing component; 111…Cover unit; 112…Cover; 113…Cover membrane; 114…Waste liquid cavity 115…Moisturizing liquid space; 116…First cap flow channel; 117…Second cap flow channel; 118…Third cap flow channel; 119…Cap flow channel portion; 121…Discharge component; 131…Wiping unit; 132…Wiping section; 133…Cleaner; 134…Wiping flow channel; 135…Wiping flow channel portion; 136…Guiding component; 141…Selector unit; 142…Selector valve; 143…Pressure reducing pump; 144…Pressure sensor; 145…Support frame; 146…Selector fixing component; 151…First connecting flow channel; 152…Second connecting flow channel; 153…Third connecting flow channel; 154…Fourth connecting flow channel; 155…First flow channel portion; 156…First connecting connector; 157…Second flow channel portion;158…Second connecting joint; 161…First relay channel; 162…Second relay channel; 163…Third relay channel; 164…Fourth relay channel; 165…Relay channel section; 166…Relay joint; M1…Medium.

Claims

1. A liquid ejection device, characterized in that, have: The head has a nozzle that sprays out liquid; A supply unit that supplies liquid to the head; A maintenance unit for maintaining the head; The selector unit selects the supply unit and the maintenance unit that open them to the atmosphere; The housing contains the supply unit, the maintenance unit, and the selector unit. The basket has an opening with an exposed opening, and a cover that blocks the exposed opening. The opening exposes the supply unit, the maintenance unit, and the selector unit. When the exposed opening is viewed from a position opposite to the opening, the supply unit, the maintenance unit, and the selector unit are located in non-overlapping positions.

2. The liquid ejection device as described in claim 1, characterized in that, It has a connection channel that connects two of the supply unit, the maintenance unit, and the selector unit. The connecting channel includes a flexible channel portion. One end of the connecting channel is exposed from the exposed port.

3. The liquid ejection device as described in claim 1, characterized in that, It has a connection channel that connects two of the supply unit, the maintenance unit, and the selector unit. Both ends of the connecting channel are exposed from the exposed opening.

4. The liquid ejection device as described in claim 1, characterized in that, It includes a cover unit that contacts the head in a manner that covers the nozzle. When viewed from a position opposite to the opening, the cover unit is located at a position overlapping at least one of the supply unit, the maintenance unit, and the selector unit.

5. The liquid ejection device as described in claim 4, characterized in that, The device includes a wiping unit that wipes the nozzle surface, which has an opening in the head, of the nozzle. When the exposed opening is viewed from a position opposite to the opening, the wiping unit is located at a position overlapping at least one of the supply unit, the maintenance unit, and the selector unit.

6. The liquid ejection device as described in claim 5, characterized in that, When the exposed opening is viewed from a position opposite to the opening, the cover unit and the wiping unit are located in a position where they do not overlap.

7. The liquid ejection device as claimed in claim 1, characterized in that, The device includes an installation unit configured to install a mounting body for collecting liquid discharged from the head as waste liquid. The exposed opening exposes the mounting unit. When viewed from a position opposite to the opening, the installation unit is located in a position that does not overlap with the supply unit, the maintenance unit, and the selector unit.

8. The liquid ejection device as claimed in claim 1, characterized in that, It includes multiple fixing components that fix the supply unit, the maintenance unit, and the selector unit relative to the housing. Multiple of the fixed components are exposed from the exposed opening.

9. The liquid ejection device according to any one of claims 1 to 8, characterized in that, It includes a fixing component for securing the supply unit relative to the basket. The supply unit has a tray. The tray is secured relative to the basket by the fixing member and protrudes from the opening. The fixing component is exposed from the opening.

10. The liquid ejection device according to any one of claims 1 to 8, characterized in that, It includes a fixing component for securing the maintenance unit relative to the housing. The maintenance unit has a tray. The tray is secured relative to the basket by the fixing member and protrudes from the opening. The fixing component is exposed from the opening.

11. The liquid ejection device as claimed in claim 9, characterized in that, It includes a detection unit that detects liquids. The detection unit is located in the tray.

12. The liquid ejection device as claimed in claim 10, characterized in that, It includes a detection unit that detects liquids. The detection unit is located in the tray.

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