JP7621172B2 - Capping Device - Google Patents

Description

The present invention relates to a capping device having a cap part that seals the outlet of a discharge part that discharges liquid.

Conventionally, inkjet printing devices have been proposed that print by ejecting ink from an inkjet head onto print media such as paper and film.

For example, Patent Document 1 proposes an inkjet printing device equipped with a cap that seals the ink ejection ports of the inkjet head.

The cap unit of the inkjet printing device seals the ink ejection ports of the inkjet head during standby when no printing process is being performed, thereby preventing the ink from drying out and solidifying. The cap unit also receives and discharges ink ejected by a so-called purge during a cleaning operation of the inkjet head.

JP 2018-149461 A

If solidified ink or dust adheres to the cap, the sealing ability will decrease and it will become difficult to expel the ink that was received during purging, so regular cleaning is necessary.

One method for cleaning the cap part is to apply a cleaning liquid to a cleaning roller made of sponge, and then move and rotate the cleaning roller along the cap part to clean it.

However, in this type of cleaning method using a cleaning roller, if too much cleaning liquid is applied to the cleaning roller, the cleaning liquid applied to the cleaning roller may splash onto the surrounding area, causing soiling.

The present invention aims to provide a capping device that can prevent cleaning liquid from splashing from the cleaning roller.

The capping device of the present invention includes a cap section that seals the outlet of a discharge section that has an outlet for discharging liquid, and a guide rail that supports and guides a cleaning roller that cleans the cap section and is inclined relative to the length direction of the cap section.

According to the capping device of the present invention, the cleaning roller that cleans the cap part is supported and guided by a guide rail that is inclined with respect to the length direction of the cap part, so that by moving and rotating the cleaning roller along the above-mentioned guide rail, a force can be applied from the cap part to the cleaning roller, thereby squeezing the cleaning roller. Therefore, excess cleaning liquid applied to the cleaning roller can be dropped down, preventing the cleaning liquid from scattering from the cleaning roller.

FIG. 1 is a schematic diagram showing the configuration of an inkjet printing apparatus using an embodiment of a capping device of the present invention; FIG. 2 is a view of the inkjet printing apparatus shown in FIG. 1 from the direction of the arrow A. FIG. 1 is a diagram showing a schematic configuration of an example of a head unit; FIG. 2 is a perspective view showing a schematic configuration of a capping unit; FIG. 5 is a top view of the capping unit shown in FIG. FIG. 2 is a diagram showing a schematic configuration of an example of a cap portion; FIG. 1 is a diagram showing an example of a cleaning roller; FIG. 5 is a front view of the capping unit shown in FIG. FIG. 1 is a diagram for explaining a moving path of a cleaning roller; Diagram showing examples of other shapes of guide rails A block diagram showing the configuration of a control system of an inkjet printing apparatus.

The following describes in detail an inkjet printing device using one embodiment of the capping device of the present invention with reference to the drawings. The inkjet printing device of this embodiment is characterized by the configuration of a capping unit that corresponds to the capping device of the present invention, but first, the configuration of the entire inkjet printing device will be described. Figure 1 is a schematic diagram of the inkjet printing device 1 of this embodiment. Also, Figure 2 is a view of the inkjet printing device 1 shown in Figure 1 as seen from the direction of arrow A. In the following description of the embodiment, the up, down, left, right, front, back, and rear indicated by the arrows in Figure 1 are the up, down, left, right, front, and rear directions of the inkjet printing device 1.

As shown in FIG. 1, the inkjet printing device 1 of this embodiment includes a base 2, a foot stand 3, a platen 4, a rail section 5, a head unit 10, and a capping unit 20.

The bases 2 are columnar members extending in the front-rear direction and arranged in parallel with a gap in the left-right direction. Two wheels 2a are provided on the bottom surface of each of the two bases 2.

A stand 3 is erected on each base 2. A platen 4 is supported on the upper surfaces of the two opposing stand 3.

Front paper guide 4a and rear paper guide 4b are formed in an arc shape and extend from the front and rear of platen 4. In addition, as shown in FIG. 2, a vacuum chamber 4c in which a fan 4d is installed is provided below platen 4. Note that the vacuum chamber 4c is not shown in FIG. 1.

When the fan 4d in the vacuum chamber 4c rotates, negative pressure is created inside the vacuum chamber 4c, and suction force is generated in the suction holes (not shown) formed in the platen 4. The suction force generated in the suction holes of the platen 4 causes the printing paper P to be attracted to the platen 4.

As shown in FIG. 2, a drive roller 6 and a pressure roller 7 are provided behind the platen 4, facing each other. Note that the drive roller 6 and the pressure roller 7 are omitted from FIG. 1.

The drive roller 6 is a long roller extending in the extension direction of the platen 4, and is rotated by the transport drive motor 61 (see FIG. 11), which will be described later.

The pressure roller 7, like the drive roller 6, is an elongated roller that extends in the extension direction of the platen 4 and is supported so that it can be raised and lowered by a lifting mechanism not shown.

The printing paper P on the rear paper guide 4b is then clamped between the drive roller 6 and the pressure roller 7, and as the drive roller 6 rotates while the pressure roller 7 presses the printing paper P, the printing paper P is sent forward.

A take-up side core holder 8 is provided on the front side of the base 2 of the inkjet printing device 1, which detachably holds the core 8a around which the printing paper P is wound. The take-up side core holder 8 is connected to a take-up drive motor 81 (see FIG. 11) via a torque limiter (not shown), and is configured so that the take-up side core holder 8 rotates due to the take-up drive motor 81.

A supply-side core holder 9 is provided on the rear side of the base 2 of the inkjet printing device 1, which detachably holds a core 9a of rolled paper on which printing paper P is wound in a roll shape. The supply-side core holder 9 is connected to a supply drive motor 91 (see FIG. 11) via a torque limiter (not shown), and is configured so that the supply-side core holder 9 is rotated by the supply drive motor 91.

As shown in FIG. 2, the roll paper (print paper P) held by the supply-side core holder 9 is pulled out and passes through the rear paper guide 4b, between the drive roller 6 and pressure roller 7, over the platen 4, and the front paper guide 4a, before being wound onto the core 8a held by the winding-side core holder 8.

A rail section 5 is mounted on the top of the two legs 3 via a support member (not shown). The rail section 5 includes a rail (not shown) extending in the left-right direction and a main scanning drive motor 54 (see FIG. 11) that moves the head unit 10 back and forth in the left-right direction on the rail.

A capping unit 20 is provided at one end of the rail portion 5. The head unit 10 is placed inside the capping unit 20, and capping is performed by the capping unit 20. In this embodiment, the capping unit 20 includes a configuration that corresponds to the capping device of the present invention.

Figure 3 is a diagram showing the schematic configuration of the head unit 10. As shown in Figure 3, the head unit 10 of this embodiment is provided with five heads, namely, the first head 11 to the fifth head 15. The second head 12, the third head 13, and the fourth head 14 are inkjet heads having multiple nozzles that eject ink of different colors, for example, C (cyan), M (magenta), and Y (yellow) inks.

The fifth head 15 has a similar configuration to the second head 12 to the fourth head 14, but ejects a pretreatment liquid instead of ink. The pretreatment liquid is a liquid that is applied for pretreatment before ink is ejected onto the printing paper P to perform the printing process. As the pretreatment liquid, for example, a liquid that improves the color development and uniform application of the ink is used, but a pretreatment liquid that is already known can be used.

The first head 11 is an inkjet head that ejects ink in the same way as the second to fourth heads 12 to 14. For example, when printing a pattern on a black base, the first head 11 ejects white ink onto the black base so that the black color of the base does not show through.

As shown in FIG. 3, the first to fifth heads 11 to 15 are arranged side by side in the direction of movement of the head unit 10 (left and right direction), but the first head 11 and the second to fourth heads 12 to 14 are staggered, and the fifth head 15 and the second to fourth heads 12 to 14 are also staggered.

That is, the second to fourth heads 12 to 14 and the first and fifth heads 11, 15 are arranged at different positions in a direction (front-to-back direction) perpendicular to the movement direction of the head unit 10. The first head 11 and the fifth head 15 are arranged at the same position in a direction (front-to-back direction) perpendicular to the movement direction of the head unit 10. The second to fourth heads 12 to 14 are also arranged at the same position in a direction (front-to-back direction) perpendicular to the movement direction of the head unit 10.

Next, the capping unit 20 of this embodiment will be described. FIG. 4 is a perspective view showing the schematic configuration of the capping unit 20 of this embodiment. FIG. 5 is a top view of the capping unit 20 shown in FIG. 4.

The capping unit 20 seals the ejection surfaces (ejection openings) of the first to fifth heads 11 to 15 to prevent them from drying out while the inkjet printing device 1 is on standby and not performing a printing process. The ejection surfaces of the first to fifth heads 11 to 15 are the surfaces on which the ejection openings of the nozzles that eject ink or pretreatment liquid are arranged.

The capping unit 20 specifically comprises first to fifth cap parts 21 to 25.

The first to fifth cap parts 21 to 25 are cap parts corresponding to the first to fifth heads 11 to 15, and are provided on the housing 20a at positions corresponding to the first to fifth heads 11 to 15.

Figure 6 shows the configuration of the first cap unit 21, but the second to fifth cap units 22 to 25 have the same configuration and function as the first cap unit 21.

As shown in FIG. 6, the first cap portion 21 includes a base 21a and a capping member 21b formed on the base 21a. The capping member 21b includes a bottom portion 21c and a peripheral wall 21d erected on the periphery of the bottom portion 21c. Two discharge holes 21e are formed in the bottom portion 21c.

The length of the capping member 21b in the front-rear direction is equal to the length of the first head 11 in the front-rear direction. The peripheral wall 21d of the capping member 21b is formed from a resin such as rubber, and abuts against and adheres closely to the first head 11, thereby sealing the ejection surface of the first head 11.

When the first head 11 is purged, the liquid ejected from the first head 11 is received by the capping member 21b and discharged from the discharge hole 21e formed in the bottom 21c.

A discharge path and a suction pump are provided within the housing 20a, and the ink or pretreatment liquid discharged into the first to fifth cap parts 21 to 25 is sucked up by the suction pump and discharged via the discharge path to a waste liquid tank (not shown).

As mentioned above, if solidified ink or dust adheres to the first to fifth cap parts 21 to 25, the sealing ability decreases and it becomes difficult to discharge ink and other substances from the discharge hole 21e, so regular cleaning is necessary.

In this embodiment, the user cleans the first to fifth cap units 21 to 25 using a cleaning roller 30 as shown in FIG. 7A and a cleaning roller 31 as shown in FIG. 7B. Specifically, the cleaning roller 30 is used as a tool for cleaning the first to fourth cap units 21 to 24 corresponding to the first to fourth heads 11 to 14 that eject ink, and the cleaning roller 31 is used as a tool for cleaning the fifth cap unit 25 corresponding to the fifth head 15 that ejects pretreatment liquid.

As shown in FIG. 7A, the cleaning roller 30 is made of a cylindrical sponge and includes a sponge portion 30a with a roller shaft As at its center, and a handle portion 30b connected to the roller shaft As of the sponge portion 30a. As shown in FIG. 7B, the cleaning roller 31 is made of a cylindrical sponge and includes a sponge portion 31a with a roller shaft As at its center, and a handle portion 31b connected to the roller shaft As of the sponge portion 31a.

As shown in Figures 7A and 7B, cleaning roller 30 and cleaning roller 31 have different lengths in the roller axial direction, with cleaning roller 30 having a length that allows it to clean the first to fourth cap parts 21 to 24 at once, and cleaning roller 31 having a length that allows it to clean the fifth cap part 25 at once. In this way, by performing cleaning using two types of cleaning rollers 30 and 31, it is possible to prevent the ink and pretreatment liquid from mixing in the first to fifth cap parts 21 to 25 and causing the ink to solidify.

In this embodiment, first to fourth guide rails 26 to 29 are provided on the housing 20a of the capping unit 20 to guide the cleaning rollers 30 and 31 described above.

As shown in Figures 4 and 5, the first guide rail 26 and the second guide rail 27 are provided on both sides of the first to fourth cap parts 21 to 24 and extend in the longitudinal direction (front-rear direction) of the first to fourth cap parts 21 to 24.

The first guide rail 26 and the second guide rail 27 are formed in an S-shape over the length in the front-rear direction of both the first cap part 21 and the second to fourth cap parts 22 to 24, which are arranged at different positions in the front-rear direction. Specifically, the first guide rail 26 and the second guide rail 27 are formed in a curve having a curvature that convex to the left in the range on both left and right sides of the first cap part 21, and are formed in a curve having a curvature that convex to the right in the range on both left and right sides of the second to fourth cap parts 22 to 24. The first guide rail 26 and the second guide rail 27 are formed in an S-shape as described above, so that they are inclined with respect to the length direction (front-rear direction) of the first to fifth cap parts 21 to 25. In this embodiment, the length direction of the first to fifth cap parts 21 to 25 is the arrangement direction of the nozzles in the first to fifth heads 11 to 15 along the transport direction of the printing paper P.

Also, FIG. 8 is a view of the capping unit 20 shown in FIG. 4, seen from the front. As shown in FIG. 8, the first guide rail 26 and the second guide rail 27 are formed from a wall section W that stands vertically against the upper surface of the housing 20a, and a horizontal section H that perpendicularly intersects with the upper end of the wall section W and extends horizontally toward the first to fourth cap sections 21 to 24. In other words, the first guide rail 26 and the second guide rail 27 are formed with an L-shaped cross section.

The wall portion W is formed higher than the height of the first to fourth cap portions 21 to 24, and is formed at a height that allows the ends E1, E2 of the roller shaft As of the cleaning roller 30 to be inserted between the horizontal portion H and the upper surfaces of the first to fourth cap portions 21 to 24. The horizontal portion H is also formed with a width sufficient to restrict the vertical movement of the ends E1, E2 of the roller shaft As of the cleaning roller 30, but is formed with a width that does not prevent the first to fourth cap portions 21 to 24 from coming into close contact with the first to fourth heads 11 to 14.

In this way, the first guide rail 26 and the second guide rail 27 are formed with an L-shaped cross section, which will be described in detail later. This allows the horizontal portion H to regulate the vertical position of the roller axis As of the cleaning roller 30, and also allows the thickness of the wall portion W to be thin, so that the first guide rail 26 and the second guide rail 27 can be provided even in a narrow space.

When cleaning the first to fourth cap parts 21 to 24, both ends of the cleaning roller 30 are placed relative to the first guide rail 26 and the second guide rail 27. At this time, as shown in FIG. 8, it is preferable that one end E1 of the roller shaft As of the cleaning roller 30 is placed on the lower surface side of the horizontal part H of the first guide rail 26, and the other end E2 is placed on the lower surface side of the horizontal part H of the second guide rail 27.

By positioning both ends E1, E2 of the roller shaft As of the cleaning roller 30 in this manner, the position of the roller shaft As of the cleaning roller 30 can be regulated by the first and second guide rails 26, 27. This makes it easier to push the cleaning roller 30 along the first and second guide rails 26, 27.

Furthermore, when cleaning the first to fourth cap parts 21 to 24, as shown in FIG. 9, the extension direction of the roller axis As of the cleaning roller 30 is set to be perpendicular to the length direction of the first to fourth cap parts 21 to 24 (left-right direction), and the cleaning roller 30 is moved and rotated while maintaining the extension direction of the roller axis As in that state.

As a result, the cleaning roller 30 is pushed along the first and second guide rails 26, 27 so that the center of the roller shaft As forms an S-shape, as shown in FIG. 9. The cleaning roller 30 may also be moved back and forth in the forward and backward directions.

By pushing the cleaning roller 30 forward in this manner, the peripheral wall 21d extending in the front-rear direction of the capping member 21b of the first to fourth cap parts 21 to 24 is pressed against the cleaning roller 30, which causes a force in the left-right direction (a direction perpendicular to the length direction of the first to fourth cap parts 21 to 24) to act on the sponge part 30a of the cleaning roller 30. This force squeezes the sponge part 30a of the cleaning roller 30, allowing excess cleaning liquid absorbed by the sponge part 30a of the cleaning roller 30 to fall downward, preventing it from splashing around.

In addition, as the cleaning roller 30 moves and rotates, the contact areas between the first to fourth cap parts 21 to 24 and the sponge part 30a change, so the first to fourth cap parts 21 to 24 can be wiped with clean parts of the sponge part 30a.

In addition, in the above embodiment, the first guide rail 26 and the second guide rail 27 are formed with a curved shape, so that the cleaning roller 30 can move smoothly and the cleaning work can be performed more quickly.

Furthermore, in the above embodiment, the first guide rail 26 and the second guide rail 27 are formed in an S-shape, so that even if the cap parts are arranged at different positions in the front-rear direction, the cleaning roller 30 can be moved smoothly, and cleaning work can be performed more quickly.

In the above explanation, the first guide rail 26 and the second guide rail 27 are described, but the third guide rail 28 and the fourth guide rail 29 are also similar in shape and structure. However, since the third guide rail 28 and the fourth guide rail 29 guide the cleaning roller 31 shown in FIG. 7B, the distance between them is narrower than the distance between the first guide rail 26 and the second guide rail 27.

In this way, by making the distance between the first guide rail 26 and the second guide rail 27 and the distance between the third guide rail 28 and the fourth guide rail 29 different, it is possible to prevent the cleaning roller 30 used when cleaning the first to fourth cap parts 21 to 24 from being mistakenly used when cleaning the fifth cap part 25. Conversely, it is possible to prevent the cleaning roller 31 used when cleaning the fifth cap part 25 from being mistakenly used when cleaning the first to fourth cap parts 21 to 24. This makes it possible to prevent the ink and the pretreatment liquid from mixing and solidifying in the first to fifth cap parts 21 to 25.

The third guide rail 28 and the fourth guide rail 29 are provided on both sides of the fifth cap portion 25 and extend in the longitudinal direction (front-rear direction) of the fifth cap portion 25, as shown in Figures 4 and 5.

The third guide rail 28 and the fourth guide rail 29 are formed in an S-shape with the same length as the first guide rail 26 and the second guide rail 27. The third guide rail 28 and the fourth guide rail 29 are formed in a curve with a curvature that convex to the left side in the range on both sides of the fifth cap part 25. The third guide rail 28 and the fourth guide rail 29 are formed in an S-shape as described above, and are therefore formed to have an inclination with respect to the length direction (front-back direction) of the fifth cap part 25.

Also, as shown in FIG. 8, the third guide rail 28 and the fourth guide rail 29 are formed with an L-shaped cross section.

When cleaning the fifth cap portion 25, both ends E1, E2 of the cleaning roller 31 are placed relative to the third guide rail 28 and the fourth guide rail 29. In this case, it is preferable that one end E1 of the roller shaft As of the cleaning roller 31 is placed on the lower surface side of the horizontal portion H of the third guide rail 28, and the other end E2 is placed on the lower surface side of the horizontal portion H of the fourth guide rail 29.

Then, in the same manner as when cleaning the first to fourth cap parts 21 to 24, the cleaning roller 31 is installed so that the extension direction of the roller axis As is perpendicular to the length direction of the fifth cap part 25 (left-right direction), and the cleaning roller 31 is moved and rotated while maintaining the extension direction of the roller axis As in that state.

As a result, the cleaning roller 31 is pushed forward and backward along the third and fourth guide rails 28, 29 so that the center of the roller axis As forms an S-shape. The cleaning roller 31 may also be moved back and forth in the forward and backward directions.

By pushing the cleaning roller 31 forward in this manner, the fifth cap portion 25 can apply a force in the left-right direction to the sponge portion 31a of the cleaning roller 31. This allows the sponge portion 31a of the cleaning roller 31 to be squeezed, allowing excess cleaning liquid absorbed by the sponge portion 31a of the cleaning roller 31 to fall downward, preventing it from splashing around.

In addition, as the cleaning roller 31 moves and rotates, the contact area between the fifth cap portion 25 and the sponge portion 31a changes, so the fifth cap portion 25 can be wiped with a clean portion of the sponge portion 31a.

In this embodiment, the first to fourth guide rails 26 to 29 are formed in an S-shape, but this is not limiting. For example, as shown in FIG. 10, the first to fourth guide rails 26 to 29 may be formed in a V-shape so that they are inclined relative to the length direction of the first cap portion 21 to the fifth cap portion 25.

Next, FIG. 11 is a block diagram showing the configuration of the control system of the inkjet printing device 1 of this embodiment. The inkjet printing device 1 operates each of the controlled parts shown in FIG. 11 in response to a control signal from the print control device 16. In this embodiment, the print control device 16 corresponds to the control unit of the present invention.

The print control device 16 and the inkjet printing device 1 are connected by a communication line such as a LAN (Local Area Network) or an Internet line, and are configured to be able to communicate with each other. The communication line may be wired or wireless.

The print control device 16 is composed of a computer equipped with a CPU (Central Processing Unit), semiconductor memory, a hard disk, etc. Based on an input print job, the print control device 16 executes a print control program stored in advance in a storage medium such as a semiconductor memory or a hard disk, and controls each part shown in FIG. 11 by operating an electric circuit.

Next, the printing operation of the inkjet printing device 1 of this embodiment will be described. Note that, here, the first head 11 is not used, and the pretreatment liquid is ejected from the fifth head 15 to apply it to the printing paper P, and then ink is ejected from the second to fourth heads 12 to 14 to print on the printing paper P to which the pretreatment liquid has been applied.

First, as shown in FIG. 2, a roll of paper is placed on the supply-side core holder 9, and the roll of paper (print paper P) is pulled out and passed through the rear paper guide 4b, between the drive roller 6 and pressure roller 7, over the platen 4, and the front paper guide 4a, before being wound around the core 8a held by the take-up-side core holder 8.

The print control device 16 then rotates the supply side core holding unit 9, the take-up side core holding unit 8, and the drive roller 6 to feed the print paper P, and stops feeding the print paper P when it reaches the initial printing position.

The print control device 16 then operates the main scanning drive motor 54 to move the head unit 10 in a first direction (either left or right) on the rail section 5. As the head unit 10 moves, the print control device 16 then operates the fifth head 15 of the head unit 10 to apply pretreatment liquid to the first scan line. Note that when scanning the first scan line, ink is not ejected from the second to fourth heads 12 to 14.

Next, the print control device 16 advances the print paper P by one scan line so that the first scan line to which the pretreatment liquid is applied is positioned directly below the second to fourth heads 12 to 14.

Then, the print control device 16 moves the head unit 10 on the rail section 5 in a second direction opposite to the first direction, and, as the head unit 10 moves, ejects ink from the second to fourth heads 12 to 14 to print the first scan line. The print control device 16 also prints the first scan line and operates the fifth head 15 to apply pretreatment liquid to the second scan line that follows the first scan line.

The print control device 16 then advances the print paper P by one scan line, positions the second scan line directly below the second to fourth heads 12 to 14, and positions the third scan line, which is the next to the second scan line, directly below the fifth head 15.

The print control device 16 then moves the head unit 10 on the rail section 5 in the first direction, and in conjunction with this movement, operates the second to fourth heads 12 to 14 and the fifth head 15 to apply pretreatment liquid to the third scan line and print on the second scan line.

Then, the print control device 16, in the same manner as described above, alternates between feeding out one scan line of print paper P and moving the head unit 10 on the rail section 5 in the first direction or the second direction, sequentially applying pretreatment liquid to the (n+1)th scan line and printing on the nth scan line.

In the above explanation, the operation is described when the pretreatment liquid is applied by the fifth head 15 without using the first head 11, but the base may be printed using the first head 11 without using the fifth head 15. In this case, the ink ejection timing from the first head 11 is the same as the ejection timing of the fifth head 15 in the above explanation.

The present invention further discloses the following supplementary notes.
(Additional Note)

In the capping device of the present invention, it is preferable that the guide rail has a curvature.

In the capping device of the present invention, it is preferable that the guide rail has an S-shape.

The capping device of the present invention includes a first cap part that seals the outlet of a first discharge part that discharges a first liquid, and a second cap part that seals the outlet of a second discharge part that discharges a second liquid different from the first liquid, and it is preferable that the distance between the first guide rails provided on both sides of the first cap part is different from the distance between the second guide rails provided on both sides of the second cap part.

1 Inkjet printing device 2 Base 2a Wheel 3 Foot 4 Platen 4a Front paper guide 4b Rear paper guide 4c Vacuum chamber 4d Fan 5 Rail section 6 Drive roller 7 Pressure roller 8 Winding side core body holding section 8a Core body 9 Supply side core body holding section 9a Core body 10 Head unit 11-15 First to fifth heads 16 Print control device 20 Capping unit 20a Housing 21-25 First to fifth cap sections 21a Base 21b Capping member 21c Bottom 21d Peripheral wall 21e Discharge holes 26-29 First to fourth guide rails 30, 31 Cleaning rollers 30a, 31a Sponge section 30b, 31b Handle section 31 Cleaning roller 54 Main scanning drive motor 61 Transport drive motor 81 Winding drive motor 91 Supply drive motor As Roller shaft E1, E2 End H Horizontal part P Printing paper W Wall part

Claims (4)

a cap portion that seals a discharge port of a discharge portion having a discharge port for discharging a liquid;
A base on which the cap portion is provided;
a guide rail provided on a mounting surface of the cap portion of the base for supporting and guiding a cleaning roller that cleans the cap portion;
A capping device in which the length direction of the guide rail on an installation surface of the cap portion is inclined relative to the length direction of the cap portion on the installation surface of the cap portion . The capping device according to claim 1, wherein the guide rail has a curvature. The capping device according to claim 1 or 2, wherein the guide rail has an S-shape. a first cap portion that seals a discharge port of a first discharge portion that discharges a first liquid;
a second cap portion that seals a discharge port of a second discharge portion that discharges a second liquid different from the first liquid;
a base on which the first cap portion and the second cap portion are provided;
a first guide rail provided on a mounting surface of the first cap portion and the second cap portion of the base, the first guide rail supporting and guiding a cleaning roller that cleans the first cap portion;
a second guide rail provided on a mounting surface of the first cap portion and the second cap portion of the base, the second guide rail supporting and guiding a cleaning roller that cleans the second cap portion;
a length direction of the first guide rail on the installation surface of the first cap portion and the second cap portion is inclined with respect to a length direction of the first cap portion on the installation surface of the first cap portion and the second cap portion, and a length direction of the second guide rail on the installation surface of the first cap portion and the second cap portion is inclined with respect to a length direction of the second cap portion on the installation surface of the first cap portion and the second cap portion,
A capping device in which the spacing between the first guide rails provided on both sides of the first cap portion is different from the spacing between the second guide rails provided on both sides of the second cap portion.