Printing apparatus

Abstract

The invention provides a printing apparatus which can easily clean a suction port for sucking spray. A printing apparatus (1) includes a printing medium holding portion (4), a carriage (20), a first head (41) having a first nozzle row (41a) for discharging a first liquid, and a suction unit (30) having a suction port (310a) for sucking a mist of the first liquid, the carriage (20) includes a head holding plate (21) that holds the first head (41) and the suction unit (30) in a state facing the printing medium holding portion (4). The head holding plate (21) has a first opening (21a) for exposing the first nozzle row (41a) and a second opening (21b) for exposing the suction port (310a), the suction unit (30) has a suction nozzle (310) provided with the suction port (310a), and the suction nozzle (310) can be attached to and detached from the head holding plate (21).

Description

Technical Field

[0001] The present invention relates to a printing device. Background Art

[0002] In the past, various printing devices equipped with a carriage were used, and a nozzle head for ejecting ink and a nozzle head for ejecting reaction liquid were provided on the carriage. Among them, there are printing devices equipped with a suction port for sucking the spray of reaction liquid in order to prevent the spray of reaction liquid from adhering to the nozzle head for ejecting ink. For example, Patent Document 1 describes that a suction port for sucking the spray is provided between the reaction liquid nozzle head and the color ink nozzle head.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2011-121277

[0004] However, in a conventional printing device in which a carriage is provided with a nozzle for ejecting ink, a nozzle for ejecting reaction liquid, and a suction port, the suction port is fixed to the carriage. Therefore, in the conventional printing device, when cleaning the suction port, an operator has to make a cleaning tool reach a narrow area, so cleaning the suction port requires a large load. Summary of the invention

[0005] The printing device of the present invention for solving the above-mentioned technical problems is characterized in that it comprises: a printing medium holding portion for holding a printing medium; a carriage for reciprocating in a scanning direction in an area opposite to the printing medium holding portion; a first nozzle arranged on the carriage and having a first nozzle row, wherein the first nozzle row has a plurality of nozzles for ejecting a first liquid arranged in an intersecting direction intersecting the scanning direction; and a suction unit arranged on the carriage and having a suction port, wherein the suction port sucks a spray of the first liquid generated when the first liquid is ejected from the first nozzle, the carriage having a nozzle holding plate, the nozzle holding plate holding the first nozzle and the suction unit in a state opposite to the printing medium holding portion, the nozzle holding plate having a first opening portion for exposing the first nozzle row and a second opening portion for exposing the suction port, the suction unit having a suction nozzle provided with the suction port, and the suction nozzle being detachable relative to the nozzle holding plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a side view of a printing device according to an embodiment of the present invention.

[0007] Figure 2 Yes means Figure 1 A three-dimensional view of the periphery of a carriage of a printing device as viewed from the upper surface side.

[0008] Figure 3 Yes means Figure 1 A three-dimensional view of the periphery of a carriage of a printing device as viewed from the bottom side.

[0009] Figure 4 Yes means Figure 1 A side view of the configuration of the suction unit of the printing device on the carriage.

[0010] Figure 5 yes Figure 1 A three-dimensional view of a suction unit of a printing device is a view showing a state where a pressing portion is in a fixed position.

[0011] Figure 6 is different from Figure 5 Observed in the direction of Figure 1 A three-dimensional view of the suction unit of the printing device.

[0012] Figure 7 yes Figure 1 A three-dimensional view of a suction unit of a printing device is shown, which shows a state in which a pressing portion is in a detachable position.

[0013] Figure 8 is different from Figure 7 Observed in the direction of Figure 1 A three-dimensional view of the suction unit of the printing device.

[0014] Fig. 9 Yes means Figure 1 A three-dimensional view of the disassembly and assembly portion of the suction unit of the printing device.

[0015] Fig.10 It means from Fig. 9 A three-dimensional view of the disassembly and assembly section after the filter is removed.

[0016] Fig.11 Yes Fig. 9 A three-dimensional diagram showing an enlarged portion of a disassembly and assembly portion.

[0017] Fig.12 Yes Figure 4 A side view showing an enlarged portion of the diagram.

[0018] Fig.13 Yes Figure 4 An enlarged representation of a part of the attraction unit is shown in a side view.

[0019] Fig.14 Viewed from the bottom side Figure 1 A perspective view of a portion of a detachable portion of a suction unit of a printing device.

[0020] Fig.15 yes Figure 1 A three-dimensional sectional view of a suction unit of a printing device.

[0021] Fig.16 Yes means Figure 1A three-dimensional view of a locking portion of a pressing portion of a suction unit of a printing device.

[0022] Fig.17 Yes means Figure 1 A three-dimensional diagram of the positioning structure of the suction unit of the printing device on the carriage.

[0023] Description of Reference Numerals

[0024] 1: Printing device, 2: Setting unit, 3: Printing unit, 4: Platen (printing medium holding unit), 5: Winding unit, 6: Roller (transport unit), 7: Control unit, 10: Drying unit, 10A: First drying unit, 10B: Second drying unit, 20: Slide, 21: Head holding plate, 21a: First opening, 21b: Second opening, 21c: Third opening, 21d: Engaging unit, 21e: Engaging unit, 21f: Plate-like member facing surface, 24: Rail, 30: Suction unit, 31: Removable unit, 32: Pressing unit, 41: First nozzle, 41a: First nozzle array, 41b: Nozzle forming surface, 42: Second nozzle, 42a: Second nozzle array, 310: Suction nozzle, 310a: Suction port, 310b: Second side wall, 310c: second end, 310d: first side wall, 310e: first end, 310f: bottom, 310g: end, 311: plate-shaped member, 311a: filter support portion, 311b: holding portion, 311c: engaged portion, 311d: engaged portion, 311e: first surface, 311f: second surface, 312: filter, 313: recess, 321: main body, 321a: fixing screw forming portion, 321b: filter clamping portion, 321c: interior, 322: fixing portion, 322a: hinge, 323: airflow generating portion, 324: fitting portion, 324a: fixing screw, G1: distance, G2: distance, P: printing medium, P1: printing surface, P2: back surface DETAILED DESCRIPTION

[0025] First, the present invention will be briefly described.

[0026] The printing device of the first aspect of the present invention for solving the above-mentioned technical problems is characterized in that it comprises: a printing medium holding portion for holding the printing medium; a carriage for reciprocating in a scanning direction in an area opposite to the printing medium holding portion; a first nozzle arranged on the carriage and having a first nozzle row, wherein the first nozzle row has a plurality of nozzles for ejecting a first liquid arranged in an intersecting direction intersecting the scanning direction; and a suction unit arranged on the carriage and having a suction port, wherein the suction port sucks a spray of the first liquid generated when the first nozzle ejects the first liquid, the carriage having a nozzle holding plate, the nozzle holding plate holding the first nozzle and the suction unit in a state opposite to the printing medium holding portion, the nozzle holding plate having a first opening portion for exposing the first nozzle row and a second opening portion for exposing the suction port, the suction unit having a suction nozzle provided with the suction port, and the suction nozzle being detachable relative to the nozzle holding plate.

[0027] According to this aspect, the suction unit has a suction nozzle provided with a suction port, and the suction nozzle can be detached from the nozzle holding plate. Therefore, it is possible to avoid the operator having to use a cleaning tool to reach a narrow area when cleaning the suction port, and the suction port can be easily cleaned.

[0028] The printing device of the second aspect of the present invention is subordinate to the first aspect, and is characterized in that the suction unit has: a disassembly portion, the suction nozzle is arranged on the disassembly portion; and a pressing portion, which can be fixed to the nozzle holding plate and can be displaced between a fixed position and a detachable position, the fixed position is a position in which the disassembly portion is fixed to the nozzle holding plate, and the detachable position is a position in which the disassembly portion can be disassembled relative to the nozzle holding plate.

[0029] According to this aspect, the suction unit has a detachable portion provided with a suction nozzle and a pressing portion that can be fixed to the nozzle holding plate and can be displaced between a fixed position and a detachable position. By forming such a structure, the suction nozzle can be simply fixed to the slide and the suction nozzle can be detached relative to the slide.

[0030] A printing device according to a third aspect of the present invention is dependent on the second aspect, and is characterized in that the pressing portion has a flow path for sucking the airflow of the spray and an airflow generating portion for generating the airflow.

[0031] According to this aspect, the pressing portion includes the flow path of the airflow and the airflow generating portion, so that the spray of the first liquid can be effectively sucked.

[0032] The fourth aspect of the present invention is a printing device subordinate to the third aspect, and is characterized in that the suction unit has a filter for capturing the spray sucked from the suction port, and the disassembly portion has: a plate-like component with the scanning direction as the short side direction and the crossing direction as the long side direction; and a filter support portion, which is arranged on the plate-like component and supports the filter as a flow path for blocking the airflow through the filter, and the pressing portion has a filter clamping portion, and when the pressing portion is located in the fixed position, the filter is clamped by the filter support portion and the filter clamping portion.

[0033] According to this aspect, the filter for collecting the spray of the first liquid is clamped by the filter support portion and the filter clamping portion when the pressing portion is in a fixed position. Therefore, the filter can be easily replaced, and the suction efficiency of the spray of the first liquid can be restored by the simple action of replacing the filter.

[0034] The printing device of the fifth aspect of the present invention is subordinate to the fourth aspect, and is characterized in that, when the disassembly and assembly portion is in a position pressed by the pressing portion located at the fixed position, the first surface of the plate-like component is opposite to the nozzle holding plate, and the second surface of the plate-like component on the side opposite to the first surface is opposite to the filter, the plate-like component extends in the long side direction, and has a recessed portion that is recessed in a first direction from the second surface side toward the first surface side, and the recessed portion functions as a part of the flow path of the airflow and the suction nozzle.

[0035] According to this aspect, the concave portion is provided which is recessed in the first direction, and the concave portion functions as a part of the flow path of the airflow and the suction nozzle. By forming such a configuration, a part of the flow path of the airflow and the suction nozzle can be simply configured.

[0036] The printing device of the sixth aspect of the present invention is subordinate to the fifth aspect, and is characterized in that the printing device includes a second nozzle, the second nozzle is arranged on the slide and has a second nozzle row, the second nozzle row has a plurality of nozzles for ejecting a second liquid arranged in the cross direction, the nozzle holding plate has a third opening portion for exposing the second nozzle row, the suction unit is arranged between the first nozzle and the second nozzle in the scanning direction, the suction nozzle has a first side wall and a second side wall as side walls arranged from the second surface side toward the first surface side, the first side wall is located on the first nozzle side in the scanning direction, and the second side wall is located on the second nozzle side in the scanning direction, the suction port is formed in the suction nozzle, the first end portion of the first side wall in the first direction constitutes a part of the contour of the suction port, the first end portion does not protrude from the second opening portion to the printing medium holding portion side, and the second end portion of the second side wall in the first direction protrudes from the second opening portion to the printing medium holding portion side.

[0037] According to this aspect, the first end portion does not protrude from the second opening portion toward the printing medium holding portion, while the second end portion protrudes from the second opening portion toward the printing medium holding portion. That is, the suction efficiency of the first liquid is increased and the suction efficiency of the second liquid is decreased by the suction port, so that the first liquid and the second liquid are not mixed, thereby making it possible to prevent the suction nozzle from being easily clogged.

[0038] A printing device according to a seventh aspect of the present invention is an aspect dependent upon the sixth aspect, and is characterized in that the second liquid is ink containing a color material, and the first liquid is a reaction liquid that reacts with the color material.

[0039] According to this aspect, the second liquid is an ink containing a color material, and the first liquid is a reaction liquid that reacts with the color material. In the case of such a configuration, although clogging is likely to occur when the first liquid and the second liquid are mixed in the suction nozzle, the suction efficiency of the first liquid is increased and the suction efficiency of the second liquid is decreased by the suction port, so that the first liquid and the second liquid are not mixed, thereby making it possible to prevent the suction nozzle from being easily clogged.

[0040] The printing device of the eighth aspect of the present invention is subordinate to the sixth aspect, and is characterized in that the suction nozzle has a bottom, the bottom is continuous with the second end and extends to the side of the first nozzle, the length of the bottom in the scanning direction is shorter than the length between the first side wall and the second side wall in the scanning direction, and the end of the bottom on the side of the first nozzle in the scanning direction constitutes a part of the contour of the suction port.

[0041] According to this aspect, the length of the bottom of the suction nozzle in the scanning direction is shorter than the length between the first side wall and the second side wall in the scanning direction, and the end of the bottom on the first nozzle side in the scanning direction constitutes a part of the contour of the suction port. By forming such a structure, the spray of the first liquid can be selectively sucked.

[0042] The printing device of the ninth aspect of the present invention is subordinate to the eighth aspect, and is characterized in that the distance from the printing medium retaining portion to the bottom is longer than the distance from the printing medium retaining portion to the nozzle forming surface of the first nozzle head on which the nozzle is formed.

[0043] According to this aspect, the distance from the print medium holding portion to the bottom is longer than the distance from the print medium holding portion to the nozzle forming surface of the first nozzle head. By forming such a structure, the spray of the first liquid can be particularly effectively attracted and the contact between the bottom and the print medium can be reduced.

[0044] The printing device of the tenth aspect of the present invention is an aspect subordinate to any one of the fourth to ninth aspects, and is characterized in that the nozzle holding plate has a locking portion on the opposite surface of the plate-like part opposite to the plate-like part, and the plate-like part is provided with a locked portion, and when the disassembly and assembly part is in a position pressed by the pressing portion located at the fixed position, the locked portion is locked with the locking portion.

[0045] According to this aspect, the nozzle holding plate has a snap-fitting portion on the surface of the plate-like member opposite to the plate-like member, and the plate-like member is provided with a snap-fitting portion, and when the detachable portion is in a position pressed by the pressing portion located at the fixed position, the snap-fitting portion snaps with the snap-fitting portion. Therefore, the snap-fitting portion of the plate-like member can be snap-fitted with the snap-fitting portion of the nozzle holding plate to properly position the suction unit on the slide.

[0046] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 An overview of an example of the printing device 1 of the present invention will be described. Figure 1 As shown, the printing device 1 of this embodiment includes: a setting unit 2 for setting a roll-shaped printing medium P; a winding unit 5 for winding the printing medium P conveyed from the setting unit 2; and a printing unit 3 for ejecting ink containing a color material to form an image on a printing surface P1 of the printing medium P conveyed in a conveying direction A in a conveying path from the setting unit 2 to the winding unit 5. The details of the printing unit 3 will be described later, but the printing unit 3 of this embodiment is configured to be able to eject a reaction liquid that reacts with the color material of the ink.

[0047] The printing device 1 of the present embodiment further includes a platen 4 as a print medium holding portion, and a plurality of rollers 6 provided in a conveying path of the print medium P, wherein the platen 4 holds the print medium P in an image forming area where an image is formed by the printing portion 3. The printing device 1 of the present embodiment includes a driving roller and a driven roller as the roller 6, wherein the driving roller as a conveying portion applies a conveying force to the print medium P, and the driven roller rotates drivenly as the print medium P is conveyed.

[0048] The printing unit 3 is provided on a side opposite to the printing surface P1 of the printing medium P conveyed in the conveying direction A, and forms an image by ejecting ink to the printing surface P1 in a state where the back surface P2 of the printing medium P on the opposite side to the printing surface P1 is supported by the platen 4. In detail, the printing device 1 of this embodiment performs printing by reciprocating the printing unit 3 in the scanning direction C along the conveying direction A. In more detail, the printing device 1 of this embodiment intermittently drives (intermittently conveys) the printing medium P in the conveying direction A, and reciprocates the printing unit 3 in the scanning direction C, and ejects ink from the printing unit 3 to perform printing.

[0049] The printing unit 3 of this embodiment can complete image formation of the entire image forming area supported by the platen 4 in the printing surface P1 by one scan (one pass), and can also complete image formation by performing multiple scans (multiple passes) on the entire image forming area. Compared with the case of completing image formation in one pass, in the case of completing image formation in multiple passes, of course, the transportation stop time of the printing medium P that is intermittently transported becomes longer.

[0050] The printing unit 3 of this embodiment is configured to perform printing by reciprocating in the scanning direction C along the conveying direction A. However, the configuration of the printing unit 3 is not particularly limited. Instead of the printing unit 3 that performs printing by reciprocating in the width direction B intersecting the conveying direction A, the printing unit 3 may be provided to perform printing by reciprocating in the width direction B intersecting the conveying direction A, or a so-called line head may be provided in which nozzles are arranged in the width direction B to eject ink in the entire width direction B of the printing medium P and printing is performed when the printing unit 3 is stopped.

[0051] like Figure 1As shown, a drying section 10 for drying ink ejected to the print medium P is provided at a position downstream of the printing section 3 in the conveying direction A in the conveying path of the print medium P. A plurality of rollers 6 are provided in the conveying path of the print medium P from the printing section 3 to the drying section 10 and in the conveying path of the print medium P from the drying section 10 to the winding section 5. The printing device 1 of the present embodiment includes a first drying section 10A and a second drying section 10B as the drying sections 10, wherein the first drying section 10A is the drying section to which the print medium P first reaches from the printing section 3, and the second drying section 10B can further dry the print medium P after the print medium P is dried by the first drying section 10A. Figure 1 As shown in FIG. 1 , in this embodiment, the first drying section 10A and the second drying section 10B are disposed vertically. However, the present invention is not limited to such a configuration.

[0052] Below, refer to Figures 2 to 4 The details of the printing unit 3 of the printing device 1 of this embodiment will be described. Figure 2 and Figure 3 As shown, the printing unit 3 includes a carriage 20 that reciprocates along a rail 24 in a region facing the platen 4 in a scanning direction C. The carriage 20 includes a nozzle holding plate 21. A first nozzle 41, a suction unit 30, and a second nozzle 42 are mounted on the nozzle holding plate 21. The first nozzle 41 includes a first nozzle array 41a, and the first nozzle array 41a has a plurality of nozzles arranged in a width direction B that eject a reaction liquid as a first liquid, and the width direction B is an intersecting direction intersecting the scanning direction C. The suction unit 30 includes a suction port 310a that sucks a spray of the reaction liquid generated when the reaction liquid is ejected from the first nozzle 41. The second nozzle 42 includes a second nozzle array 42a, and the second nozzle array 42a has a plurality of nozzles arranged in the width direction B that eject ink as a second liquid. It should be noted that, in the present embodiment, one first nozzle 41 , one suction unit 30 , and four second nozzles 42 are installed on the nozzle holding plate 21 , but their number is not particularly limited.

[0053] The head holding plate 21 holds the first head 41, the suction unit 30, and the second head 42 in a state facing the platen 4. Figure 3 and Figure 4 As shown, the head holding plate 21 is provided with a first opening 21 a exposing the first nozzle row 41 a , a second opening 21 b exposing the suction port 310 a , and a third opening 21 c exposing the second nozzle row 42 a .

[0054] like Figure 4As shown, the suction unit 30 has a suction nozzle 310 provided with a suction port 310a. The suction nozzle 310 can be detached relative to the nozzle holding plate 21, and the details will be described later. Therefore, in the printing device 1 of this embodiment, when cleaning the flow path of the airflow such as the suction port 310a, the suction nozzle 310 can be removed from the carriage 20, and the flow path of the airflow such as the suction port 310a can be cleaned using a cotton swab or the like. That is, the printing device 1 of this embodiment can avoid the operator having to use cleaning tools to reach a narrow area, and can easily clean the suction port 310a.

[0055] Below, refer to Figures 5 to 17 The suction unit 30, which is a main part of the printing device 1 of this embodiment, will be described in more detail. Figures 5 to 8 As shown, the suction unit 30 has a detachable portion 31 and a pressing portion 32. Fig.12 As shown in FIG. 1 and FIG. 2 , the suction nozzle 310 is provided on the disassembly portion 31. The pressing portion 32 is as shown in FIG. Figure 5 and Figure 6 As shown in FIG. 1 , the nozzle holder 21 can be fixed to the nozzle holder plate 21 and can be displaced between a fixed position and a detachable position, wherein the fixed position is a position where the detachable portion 31 is fixed to the nozzle holder plate 21, and the detachable position is as shown in FIG. Figure 7 and Figure 8 The detachable portion 31 is shown in a position where it can be attached to and detached from the head holding plate 21. The printing device 1 of this embodiment is configured in this way, so that the suction nozzle 310 can be easily fixed to the carriage 20 and can be attached to and detached from the carriage 20.

[0056] like Figures 5 to 8 As shown in FIG. 1 and FIG. 2 , the pressing portion 32 includes a main body 321, a fixing portion 322, and a fitting portion 324. The fixing portion 322 is fixed to the nozzle holding plate 21, and the main body 321 can be rotated at a hinge 322a with a direction along the scanning direction C as a rotation axis. The fitting portion 324 is fixed to the nozzle holding plate 21, and as shown in FIG. Fig.16 As shown in the figures, the locking portion of the pressing portion 32 is fixed to the fitting portion 324 by fitting the fixing screw 324a of the fixing screw forming portion 321a installed on the main body 321, thereby locking the main body 321 of the pressing portion 32 in a fixed position.

[0057] In the printing device 1 of the present embodiment, the pressing portion 32 is configured to rotate in this manner, but the present invention is not limited to this configuration. For example, instead of configuring the pressing portion 32 to rotate, the pressing portion 32 may be configured to slide along the width direction B or to be removable.

[0058] like Fig.15As shown in FIG. 1 , the interior 321c of the main body 321 of the pressing part 32 serves as a flow path for the airflow that attracts the spray of the reaction solution. Figures 5 to 8 , Fig.15 As shown, the main body 321 includes an airflow generating unit 323 which is a fan for generating airflow. The printing device 1 of the present embodiment is configured in this way, so that the spray of the reaction liquid can be efficiently sucked.

[0059] like Figures 7 to 9 as well as Figures 11 to 13 As shown, the suction unit 30 has a filter 312 for collecting the spray of the reaction solution sucked from the suction port 310a. Fig.10 As shown in the figures, the disassembly and assembly part 31 includes a plate-shaped member 311 and a filter support part 311a. The plate-shaped member 311 has a scanning direction C as a short side direction and a width direction B as a long side direction. The filter support part 311a is provided on the plate-shaped member 311 and supports the filter 312 as a flow path for blocking the airflow through the filter 312. The suction nozzle 310 is also provided on the plate-shaped member 311.

[0060] like Figure 8 , Fig.12 as well as Fig.13 As shown, the pressing portion 32 has a filter clamping portion 321b. Fig.12 and Fig.13 As shown, when the pressing portion 32 is located at the fixed position, the filter 312 is clamped by the filter support portion 311a and the filter clamping portion 321b. Due to such a configuration, the printing device 1 of this embodiment can easily replace the filter 312, and can restore the suction efficiency of the spray of the reaction liquid by simply replacing the filter 312.

[0061] In other words, the printing device 1 of this embodiment is configured to be able to easily replace the filter 312 by making the detachable portion 31 having the suction nozzle 310 a separate component from the pressing portion 32. Furthermore, the printing device 1 of this embodiment is configured to be able to easily replace the filter 312 by providing the plate-shaped member 311 with a gripping portion 311b that the operator can grip when removing the suction nozzle 310 from the carriage 20.

[0062] like Fig.12 As shown in FIG. 1 and FIG. 2 , when the detachable part 31 is in a position pressed by the pressing part 32 located at a fixed position, the first surface 311e of the plate-shaped part 311 faces the nozzle holding plate 21, and the second surface 311f of the plate-shaped part 311 opposite to the first surface 311e faces the filter 312. Fig.11 It extends in the long side direction (width direction B) as shown in FIG. Fig.12The concave portion 313 is shown as being concave in the first direction (downward direction) from the second surface 311f side toward the first surface 311e side. The concave portion 313 functions as a part of the flow path of the airflow and the suction nozzle 310. The printing device 1 of this embodiment can simply constitute a part of the flow path of the airflow and the suction nozzle 310 by forming such a structure.

[0063] like Figure 4 As shown in FIG. 1 , the suction unit 30 is disposed between the first nozzle 41 and the second nozzle 42 in the scanning direction C. Fig.13 As shown, the nozzle 310 has a first side wall 310d and a second side wall 310b as side walls arranged from the second surface 311f side toward the first surface 311e side, wherein the first side wall 310d is located on the first nozzle 41 side in the scanning direction C, and the second side wall 310b is located on the second nozzle 42 side in the scanning direction C. Fig.13 As shown, the suction port 310 a is formed in the suction nozzle 310 , and the first end portion 310 e of the first side wall 310 d in the first direction (downward direction) constitutes a part of the outline of the suction port 310 a .

[0064] like Fig.12 As shown, the first end portion 310e does not protrude from the second opening portion 21b toward the platen 4 side, and the second end portion 310c of the second side wall 310b in the first direction protrudes from the second opening portion 21b toward the platen 4 side (lower side). Although the suction nozzle 310 is prone to clogging when the reaction liquid and the ink are mixed, the printing device 1 of this embodiment is formed into such a structure that the suction port 310a improves the suction efficiency of the reaction liquid and reduces the suction efficiency of the ink, so that the reaction liquid and the ink are not mixed, and the suction nozzle 310 is not easy to be clogged.

[0065] Explain from another perspective, Figure 12 to Figure 14 As shown, the suction nozzle 310 has a bottom 310f, which is continuous with the second end 310c and extends to the first nozzle part 41. Fig.13 As shown, the length L1 of the bottom 310f in the scanning direction C is shorter than the length L2 between the first side wall 310d and the second side wall 310b in the scanning direction C, and the end 310g of the bottom 310f on the first nozzle 41 side in the scanning direction C constitutes a part of the contour of the suction port 310a. By forming the suction port 310a toward the first nozzle 41 side in this way, the spray of the reaction liquid can be selectively sucked.

[0066] like Fig.12As shown, in the printing device 1 of this embodiment, the distance G2 from the platen 4 to the bottom 310f is longer than the distance G1 from the platen 4 to the nozzle forming surface 41b where the nozzles are formed of the first nozzle head 41. With such a configuration, the spray of the reaction liquid can be particularly effectively attracted, and the contact between the bottom 310f and the printing medium P can be reduced.

[0067] like Fig.17 As shown in FIG. 2 , the nozzle holding plate 21 has engaging portions 21d and 21e on the plate-like member facing surface 21f facing the plate-like member 311. Fig.17 As shown, the plate-shaped member 311 is provided with an engaged portion 311c and an engaged portion 311d. When the detachable member 31 is in a position pressed by the pressing portion 32 located at a fixed position, the engaged portion 311c is engaged with the engaging portion 21d, and the engaged portion 311d is engaged with the engaging portion 21e. Since the printing device 1 of this embodiment is configured in this way, the engaged portions 311c and 311d of the plate-shaped member 311 can be engaged with the engaging portions 21d and 21e of the nozzle holding plate 21 to properly position the suction unit 30 on the carriage 20.

[0068] In the printing device 1 of the present embodiment, the engaging portion 21d is a convex portion that is circular when viewed from above, and the engaging portion 21e is a convex portion that is straw bag-shaped when viewed from above. Therefore, the engaged portion 311c is a circular hole portion that can be engaged with the engaging portion 21d when viewed from above, and the engaged portion 311d is a groove-shaped cutout portion that can be engaged with the engaging portion 21e when viewed from above. However, the configuration is not limited to this, and for example, the engaged portion may be a convex portion and the engaging portion may be a concave portion that can be engaged with the convex portion, etc.

[0069] The present invention is not limited to the above-mentioned embodiments, and can be implemented in various configurations within the scope of the main purpose. For example, the technical features in the embodiments corresponding to the technical features in the various aspects recorded in the summary of the invention can be appropriately replaced or combined to solve part or all of the above-mentioned technical problems or achieve part or all of the above-mentioned effects. In addition, as long as the technical feature is not described as a necessary feature in this specification, the technical feature can be appropriately deleted.

Claims

1. A printing device, characterized in that: have: A printing medium holding unit that holds the printing medium; a carriage that reciprocates in a scanning direction in a region opposing the print medium holding portion; a first nozzle head disposed on the carriage and having a first nozzle array, wherein the first nozzle array has a plurality of nozzles for ejecting a first liquid arranged in a direction intersecting the scanning direction; as well as a suction unit, which is provided on the carriage and has a suction port, wherein the suction port sucks a spray of the first liquid generated when the first liquid is ejected from the first ejection head; The carriage includes a head holding plate, and the head holding plate holds the first head and the suction unit in a state facing the printing medium holding portion. The head holding plate has a first opening portion that exposes the first nozzle array and a second opening portion that exposes the suction port. The suction unit has a suction nozzle provided with the suction port, The suction nozzle is attachable and detachable to the nozzle holding plate.

2. The printing device according to claim 1, characterized in that The attraction unit comprises: a disassembly and assembly portion, wherein the suction nozzle is disposed on the disassembly and assembly portion; and The pressing portion can be fixed to the nozzle holding plate and can be displaced between a fixed position and a detachable position. The fixed position is a position where the detachable portion is fixed to the nozzle holding plate, and the detachable position is a position where the detachable portion can be detached relative to the nozzle holding plate.

3. The printing device according to claim 2, characterized in that The pressing portion includes a flow channel for sucking an airflow of the spray and an airflow generating portion for generating the airflow.

4. The printing device according to claim 3, characterized in that The suction unit includes a filter for collecting the spray sucked from the suction port. The disassembly and assembly part comprises: a plate-shaped member having the scanning direction as a short side direction and the crossing direction as a long side direction; and a filter support portion provided on the plate-shaped member and supporting the filter so as to block the flow path of the airflow through the filter, The pressing portion has a filter clamping portion, When the pressing portion is located at the fixed position, the filter is clamped by the filter supporting portion and the filter clamping portion.

5. The printing device according to claim 4, characterized in that When the detachable portion is in a position pressed by the pressing portion located at the fixed position, the first surface of the plate-shaped member is opposed to the nozzle holding plate, and the second surface of the plate-shaped member on the side opposite to the first surface is opposed to the filter, and the plate-shaped member extends in the long side direction and has a recessed portion that is recessed in a first direction from the second surface side toward the first surface side. The recessed portion functions as a part of the flow path of the airflow and the suction nozzle.

6. The printing device according to claim 5, characterized in that The printing device includes a second nozzle head, the second nozzle head is provided on the carriage and has a second nozzle array, the second nozzle array includes a plurality of nozzles arranged in the intersecting direction for ejecting a second liquid, The nozzle holding plate has a third opening for exposing the second nozzle array. The suction unit is disposed between the first nozzle and the second nozzle in the scanning direction. The nozzle has a first side wall and a second side wall as side walls arranged from the second surface side toward the first surface side, The first side wall is located on one side of the first nozzle in the scanning direction. The second side wall is located on one side of the second nozzle in the scanning direction. The suction port is formed in the suction nozzle, and a first end portion of the first side wall in the first direction constitutes a part of the outline of the suction port. The first end portion does not protrude from the second opening toward the print medium holding portion, and a second end portion of the second side wall in the first direction protrudes from the second opening toward the print medium holding portion.

7. The printing device according to claim 6, characterized in that: The second liquid is ink containing a color material, The first liquid is a reaction liquid that reacts with the color material.

8. The printing device according to claim 6, characterized in that The suction nozzle has a bottom, which is continuous with the second end and extends to one side of the first nozzle. The length of the bottom in the scanning direction is shorter than the length between the first side wall and the second side wall in the scanning direction. An end portion of the bottom portion on the first nozzle head side in the scanning direction constitutes a part of the outline of the suction port.

9. The printing device according to claim 8, characterized in that A distance from the print medium holding portion to the bottom portion is longer than a distance from the print medium holding portion to a nozzle forming surface of the first head on which nozzles are formed.

10. The printing device according to any one of claims 4 to 9, characterized in that: The nozzle holding plate has an engaging portion on a surface of the plate-shaped member facing the plate-shaped member. The plate-shaped member is provided with an engaged portion, and when the detachable portion is in a position pressed by the pressing portion located at the fixed position, the engaged portion is engaged with the engaging portion.

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