Patent Application
20240359472
The present disclosure relates to an inkjet recording apparatus.
Inkjet recording apparatuses that record an image by ejecting ink from nozzles provided in recording heads are capable of forming a high-definition image and thus have been widely used as recording apparatuses such as facsimile machines, copiers, and printers.
In such an inkjet recording apparatus, in a case where the maximum number of colors available for use is larger than the number of colors actually used, some recording heads and some waste ink collection containers may be left without being used. In such a case, if an unused recording head or an unused waste ink collection container is left without being used, it is a waste of the component itself and its installation space as well.
Patent Document 1 listed below discloses an image recording apparatus that includes a cartridge holding portion that is disposed in a recording head to hold an ink cartridge used in printing, and a waste ink-cartridge storage portion for storing a waste ink tank. In this image recording apparatus, an empty ink cartridge is used as a waste ink tank to store therein waste ink received from a capping member via a waste ink outlet, and when a next empty ink cartridge is discharged from the cartridge holding portion, the waste ink tank is replaced.
As a maintenance method for an unused component, an inkjet recording apparatus disclosed in Patent Document 2 listed below selectively electrifies an unused cartridge stored in a storage portion and an in-use ink cartridge mounted on a carrier, and, besides electrification for printing, periodically electrifies the unused cartridge stored in the storage portion to thereby perform dummy ejection that does not contribute to printing.
With the methods disclosed in Patent Documents 1 and 2, it is possible to facilitate replacement and reuse of a used ink cartridge and a maintenance operation for an unused ink cartridge, but unfortunately, it is impossible to make an effective use of an unused recording head or an unused waste ink collection container and the installation space thereof.
In view of the above problem, an object of the present invention is to provide an inkjet recording apparatus capable of making effective use of an unused recording head and an unused waste ink collection container.
To achieve the above object, according to a first configuration of the present invention, an inkjet recording apparatus includes a conveyance portion, a plurality of line heads, a plurality of waste ink collection containers, a display portion, and a control portion. The conveyance portion conveys a sheet. The plurality of line heads each include a recording head that performs image recording by ejecting ink onto the sheet that is conveyed by the conveyance portion. The plurality of waste ink collection containers each collect and store the ink of a corresponding one of different colors that has been ejected from the recording head but has not been used in the image recording. The display portion indicates states of the line heads and the waste ink collection containers. The control portion detects the states of the line heads and the waste ink collection containers and controls display performed by the display portion. Here, in a case where an unused line head exists among the line heads or an unused waste ink collection container exists among the waste ink collection containers and where the recording head in one of the line heads in use or one of the waste ink collection containers in use needs to be replaced, the control portion indicates, on the display portion, the recording head in the unused line head or the unused waste ink collection container as a recording head available for replacement or a waste ink collection container available for replacement.
According to the first configuration of the present invention, in a case where a recording head in use or a waste ink collection container in use needs to be replaced, it is notified that it can be replaced with an unused recording head or an unused waste ink collection container. Thus, even in a case where no replacement recording head or no replacement waste ink collection container is available at hand, it is possible to continue using the inkjet recording apparatus, and thus to suppress occurrence of down time of the inkjet recording apparatus. Further, the unused recording head and the unused waste ink collection container are made use of without being left unused, and this contributes to effective use of components.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in a
Inside the printer 100, a first sheet conveyance path 4a is provided. The first sheet conveyance path 4a is located at a position that is to the upper right of the sheet feeding cassette 2a and that is to the left of the manual sheet feeding tray 2b. A sheet P sent out from the sheet feeding cassette 2a passes through the first sheet conveyance path 4a to be conveyed vertically upward along a side face of the printer main body 1. A sheet P sent out from the manual sheet feeding tray 2b passes through the first sheet conveyance path 4a to be conveyed substantially horizontally leftward.
At a downstream end of the first sheet conveyance path 4a with respect to the sheet conveyance direction, a pair of registration rollers 13 are provided. Closely downstream of the pair of registration rollers 13, the first belt conveyance portion (conveyance portion) 5 and the recording portion 9 are disposed. The pair of registration rollers 13, while correcting skewed feeding of a sheet P, send out the sheet P toward the first belt conveyance portion 5 with timing coordinated with timing of ink ejection operation executed by the recording portion 9.
Between the pair of registration rollers 13 and the first belt conveyance portion 5, there is disposed a contact image sensor (CIS) 20 for detecting a position of an end part of a sheet P in a width direction (a direction perpendicular to the sheet conveyance direction) thereof.
The first belt conveyance portion 5 is provided with a first conveyance belt 8 that is an endless belt wound around a first driving roller 6 and a first driven roller 7. A sheet P sent out from the pair of registration rollers 13 passes under the recording portion 9 in a state held by suction on a conveyance surface 8a (an upper surface in
At a position that is inside the first conveyance belt 8 and that is opposite a back side of the conveyance surface 8a of the first conveyance belt 8, a first sheet suction portion 30 is provided. The first sheet suction portion 30 is provided with a large number of holes 30a for air suction formed in an upper face thereof. The first sheet suction portion 30 has a fan 30b disposed inside thereof, and is capable of sucking air downward through the upper face thereof. Further, the first conveyance belt 8 is also provided with a large number of vent holes (not shown) for air suction. This configuration allows the first belt conveyance portion 5 to convey a sheet P while holding it by suction on the conveyance surface 8a of the first conveyance belt 8.
The recording portion 9 performs recording of an image on a sheet P conveyed thereto by being held by suction on the conveyance surface 8a of the first conveyance belt 8. As shown in
The recording heads 17 constituting the line heads 11C to 11K are supplied with ink of four colors (cyan, magenta, yellow, and black) stored in ink containers 50C to 50K (see
Corresponding to information of image data received from an external computer or the like, the line heads 11C to 11K each sequentially eject ink of cyan, magenta, yellow, or black from ink ejection nozzles 18 of their respective recording heads 17 toward a sheet P attached by suction on the first conveyance belt 8. As a result, on the sheet P, a full-color image having ink of the four colors, namely, cyan, magenta, yellow, and black superimposed one on another is formed. Note that the line head 11R is not used.
On a downstream side (a left side in
The second belt conveyance portion 12 includes a second conveyance belt 40 that is an endless belt wound around a second driving roller 41 and a second driven roller 42. The second conveyance belt 40 is caused by the second driving roller 41 to rotate counterclockwise in
At a position that is inside the second conveyance belt 40 and that is opposite a back side of a conveyance surface 40a of the second conveyance belt 40, a second sheet suction portion 43 is provided. The second sheet suction portion 43 is provided with a large number of holes 43a for air suction formed in an upper face thereof. The second sheet suction portion 43 is provided with a fan 43b disposed inside thereof, and is capable of sucking air downward through the upper face thereof. The second conveyance belt 40 also has a large number of vent holes (not shown) for air suction formed therein. This configuration allows the second belt conveyance portion 12 to convey a sheet P while holding the sheet P by suction on the conveyance surface 40a of the second conveyance belt 40.
At a position that is on a downstream side of the second belt conveyance portion 12 with respect to the sheet conveying direction and that is close to a left side face of the printer main body 1, a decurler portion 14 is provided. The sheet P having the ink thereon dried on the second belt conveyance portion 12 is sent to the decurler portion 14, where a curl developed in the sheet P is corrected.
Downstream of (in
Under the second belt conveyance portion 12, a maintenance unit 19 is arranged. When executing maintenance of the recording heads 17, the maintenance unit 19 moves to under the recording portion 9, and wipes off the ink ejected (purged) from the ink ejection nozzles 18 of the recording heads 17.
The waste ink collection containers 21C to 21R are respectively provided corresponding to the line heads 11C to 11R. The waste ink collection containers 21C to 21R respectively collect ink that has been ejected from the recording heads 17 constituting the line heads 11C to 11R but has not been used in image recording (printing), and store the collected ink therein. Examples of ink that has not been used in image recording include ink ejected in idle ejection (flushing) which is performed for the purpose of preventing clogging of the ink ejection nozzles 18 at times other than when image recording is performed, and ink (purge ink) pushed out of the ink ejection nozzles 18 in a recovery operation of the recording heads 17 after a long period of disuse.
The reader/writer module 23 reads and writes information from and onto IC chips 53 (see
The operation panel 27 is an operation portion for accepting inputs of various settings. For example, by operating the operation panel 27, an operator can input the size of a sheet P to be set in the sheet feeding cassette 2, that is, the size of a sheet P to be conveyed by the first conveyance belt 8. Further, by operating the operation panel 27, the operator can also input the number of sheets P to be printed and give an instruction to start a print job. The operation panel 27 further functions as a notification device (a display portion) that gives notifications regarding the operation status of the printer 100 and, as will be described later, notifications regarding the line heads 11C to 11R and the waste ink collection containers 21C to 21R.
The storage 28 is a memory that stores an operation program for a control device 110 and various kinds of information, and is configured by including a read only memory (ROM), a random access memory (RAM), a nonvolatile memory, etc. Information set via the operation panel 27 is stored in the storage 28.
The communication portion 29 is a communication interface for transmitting and receiving information to and from an external device (such as a personal computer (PC)). For example, when the operator operates a PC to transmit a printing command together with image data to the printer 100, the image data and the printing command is fed to the printer 100 via the communication portion 29. In the printer 100, a main control portion 110a controls the recording heads 17 of each of the line heads 11C to 11K based on the image data mentioned above and causes the recording heads 17 to eject ink, whereby an image can be recorded on a sheet P.
The printer 100 of the present embodiment includes the control device 110. The control device 110 is configured by including, for example, a central processing unit (CPU) and a memory. Specifically, the control device 110 includes the main control portion 110a, a flushing control portion 110b, a sheet feeding control portion 110c, and a maintenance control portion 110d.
The main control portion 110a controls operations of various portions of the printer 100. For example, operations such as driving of various rollers provided inside the printer 100, ejection of ink from the recording heads 17 during image recording, and the like are controlled by the main control portion 110a. The flushing control portion 110b drives the ink ejection nozzles 18 of the recording heads 17 to execute flushing. For flushing, openings (not shown) are formed in the first conveyance belt 8, and during flushing, ink is ejected from the ink ejection nozzles 18 with timing coordinated with timing of passing of the openings.
The sheet feeding control portion 110c is a recording medium feeding control portion that controls the pair of registration rollers 13 functioning as a recording medium feeding portion. For example, the sheet feeding control portion 110c controls the pair of registration rollers 13 based on timing when the CIS 20 detects a rear end of a sheet P, and thereby controls timing of conveying a next sheet P.
The maintenance control portion 110d performs control for causing the recording heads 17 to execute the above-described purging of forcibly pushing the ink out of each of the ink ejection nozzles 18. When causing the recording heads 17 to execute the purging, the maintenance control portion 110d also controls driving of the above-described maintenance unit 19 (for example, movement of the maintenance unit 19 downward of the recording portion 9 and evacuation of the maintenance unit 19 from downward of the recording portion 9).
The control device 110 may further include a calculation portion that performs necessary calculations and a timer that counts time. Or instead, the functions of the calculation portion and the timer may be executed by the main control portion 110a.
To the recording heads 17, the IC chips 53 are attached. Onto the IC chips 53 attached to the recording heads 17 in the line heads 11C to 11K, at a time when the printer 100 starts to be used, the reader/writer module 23 (see
Corresponding to the line heads 11C to 11R, the waste ink collection containers 21C to 21R are provided. Ink (waste ink) that has not been used in image recording, such as ink ejected in flushing and ink purged, is collected in the waste ink collection containers 21C to 21R via ink receiving portions and ink collection paths (of which none is illustrated) disposed opposite the recording heads 17. The waste ink collection containers 21C to 21R are all identical in shape and structure, and thus are interchangeable with each other.
Here, the line head 11R is provided as a reserve. In a case of using ink of another color in addition to cyan, magenta, yellow, and black, an ink container of the predetermined color is connected to the line head 11R. In the present embodiment, the line head 11R is unused, and thus no ink container is connected thereto, and the recording heads 17 thereof is in an unused state. Thus, no information regarding either ink color or ink installation has been written on the IC chips 53 attached to the recording heads 17 in the line head 11R. The waste ink collection container 21R is also in an unused (empty) state.
In a case, for example, where one of the recording heads 17 in the line heads 11C to 11K which are in use has failed or where one of the waste ink collection containers 21C to 21K has become full, the failed recording head 17 or the full one of the waste ink collection containers 21C to 21K needs to be replaced, but there may be a case where unfortunately no recording head or no waste ink collection container for replacement is available at hand. In such a case, if it can be indicated that the recording head 17 of the line head 11R or the waste ink collection container 21R is available for replacement, it is possible to continue using the printer 100. The recording head 17 of the line head 11R and the waste ink collection container 21R, which are unused, can be made effective use of, without being left unused in the printer main body 1.
The main control portion 110a determines whether or not failure has occurred in the recording heads 17 of the line heads 11C to 11K in use (step S1). In a case where no failure has occurred (No in step S1), the monitoring of failure is continued. In a case where a recording head 17 of one of the line heads 11C to 11K has failed, (Yes in step S1), the main control portion 110a indicates, on the operation panel 27, the one (for example, the line head 11K) of the line heads 11C to 11K in which the failure has occurred (step S2).
Next, the main control portion 110a determines presence/absence of a recording head 17 in the line head 11R that is unused (step S3). The presence/absence of a recording head 17 and whether the recording head 17 is unused or not can be determined by the reader/writer module 23 reading color information stored in the IC chip 53 on the recording head 17 of the line head 11R.
In a case where there is a recording head 17 in the line head 11R that is unused (Yes in step S3), the main control portion 110a indicates, on the operation panel 27, the recording head 17 of the line head 11R as a recording head 17 available for replacement (step S4).
Next, the main control portion 110a, by means of the reader/writer module 23, writes color information and ink installation information (here, installation information of the black ink) on the IC chip 53 of the recording head 17 after the replacement (step S6). Thereafter, it is indicated, on the operation panel 27, that there is no recording head 17 present in the line head 11R that is unused (step S7), and the operation of replacing the recording head 17 is finished.
On the other hand, in step S3, in a case where there is no recording head 17 present in the line head 11R (No in step S3), use of the printer 100 is prohibited (step S8), and the process is finished.
According to the example of control shown in
Furthermore, after the recording head 17 of the line head 11R that is unused is used as a replacement recording head 17, it is indicated that there is no recording head 17 present in the line head 11R, and thus the operator can restock the line head 11R with new recording heads 17 in preparation for a next failure in the line head 11C, 11M, 11Y, or 11K, or in preparation for a case where the line head 11R needs to be used.
Note that, even if no recording head 17 is attached in the line head 11R, it will have no effect on operations of the printer 100, and thus it can be freely selected as necessary whether or not to indicate that there is no recording head 17 present in the line head 11R. Further, in a case where a plurality of recording heads 17 available for replacement are attached in the line head 11R, it can be indicated, on the operation panel 27, that the number of recording heads 17 attached in the line head 11R has been reduced as a result of the replacement.
Next, a description will be given of how to make use of the waste ink collection container 21R that is unused.
The main control portion 110a determines whether or not fullness of the waste ink collection containers 21C to 21K in use has been detected (step S1). Examples of a method for detecting the fullness of the waste ink collection containers 21C to 21K include conventionally known methods such as a method where a sensor, for example, is used to directly detect amounts of ink in the waste ink collection containers 21C to 21K, and a method where the amounts of ink are calculated from amounts of ink ejected (numbers of times of ink ejection) from the recording heads 17 of the line heads 11C to 11K except during image recording.
In a case where none of the waste ink collection containers 21C to 21K has been detected to be full (No in step S1), monitoring for the detection of fullness is continued. In a case where fullness of one of the waste ink collection containers 21C to 21K has been detected (Yes in step S1), the main control portion 110a indicates, on the operation panel 27, the one of the waste ink collection containers 21C to 21K (for example, the waste ink collection container 21K) that has been detected to be full (step S2).
Next, the main control portion 110a determines presence/absence of the waste ink collection container 21R that is unused (step S3). The presence/absence of the waste ink collection container 21R can be detected, for example, by using a sensor (unillustrated) provided in the attachment portion 55 (see
In a case where the waste ink collection container 21R that is unused is present (Yes in step S3), the main control portion 110a indicates, on the operation panel 27, the waste ink collection container 21R as a waste ink collection container available for replacement (step S4).
The operator, after confirming what is indicated on the operation panel 27, opens the exterior cover of the printer main body 1 for access to the waste ink collection containers 21C to 21R attached in the attachment portion 55. At this time, the main control portion 110a causes the LED lamp 57R, which corresponds to the waste ink collection container 21R, to blink as shown in
Next, the main control portion 110a cancels the indication of the detection of the fullness of the waste ink collection container 21K (step S6). Thereafter, the main control portion 110a indicates, on the operation panel 27, that the waste ink collection container 21R that is unused is absent (step S7), and the operation of replacing the waste ink collection containers 21C to 21R is finished.
On the other hand, in a case where, in step S3, the waste ink collection container 21R that is unused is absent (No in step S3), the use of the printer 100 is prohibited (step S8) and the process is finished.
According to the example of control shown in
The procedure of replacing the waste ink collection containers 21C to 21R is indicated by means of the blinking of the LED lamps 57C to 57R, and this makes it possible for the operator to smoothly proceed with the operation of replacing a full one of the waste ink collection containers 21C to 21K, without any risk of following a wrong procedure or erroneously replacing one of the waste ink collection containers 21C to 21K that does not need to be replaced.
Furthermore, after the waste ink collection container 21R that is unused is used as a replacement for the waste ink collection container 21C, 21M, 21Y, or 21K, it is indicated that the waste ink collection container 21R that is unused is absent, and thus the operator can restock a waste ink collection container 21R in preparation for a next case where the waste ink collection container 21, 21M, 21Y, or 21K becomes full or a case where the line head 11R needs to be used.
Note that, even if no waste ink collection container 21R is attached, it will have no effect on operations of the printer 100, and thus it can be freely selected as necessary whether or not to indicate that the waste ink collection container 21R is absent. Further, in a case where a plurality of waste ink collection containers 21R that are unused are attached, the operation panel 27 may indicate that the number of the waste ink collection containers 21R has been reduced as a result of the replacement.
Next, the main control portion 110a determines whether or not the waste ink collection container 21K, which is full. has been removed (step S8). In a case where the waste ink collection container 21K has not been removed (No in step S8), the on state of the indication of the detection of the fullness at the attachment position (the on state of the LED lamp 57R) is continued. In a case where the waste ink collection container 21K has been removed (Yes in step S8), the indication of the detection of the fullness at the attachment position is brought into an off state (the LED lamp 57R is turned off) (step S9). Thereafter, as shown in
According to the example of control shown in
Further, by bringing the indication of the detection of the fullness at the attachment position into the on state (turning the LED lamp 57R on) after attaching the full waste ink collection container 21K, it is possible to eliminate the risk of leaving the waste ink collection container 21K without disposing of it. Furthermore, after the waste ink collection container 21K is removed, it is indicated that the waste ink collection container 21R that is unused is absent, and thus the operator can restock a waste ink collection container 21R in preparation for a next case where one of the waste ink collection containers 21C to 21K becomes full or a case where the line head 11R needs to be used.
Note that, even if no waste ink collection container 21R is attached, it will have no effect on operations of the printer 100, and thus it can be freely selected as necessary whether or not to indicate that the waste ink collection container 21R is absent. Here, in a case where a plurality of waste ink collection containers 21R that are unused are attached, the operation panel 27 may indicate that the number of the waste ink collection containers 21R has been reduced as a result of the replacement.
The embodiment described above is in no way meant to limit the present invention, which thus allows for many modifications and variations within the spirit of the present invention. For example, although the above embodiment has dealt with an example where the five line heads 11C to 11R are provided among which the four line heads 11C to 11K are in use, the present invention is applicable as long as at least one line head that is unused is present, and thus the total number of the line heads and the number of the line heads in use can be freely set as necessary.
There is no particular limitation to the number of recording heads 17 in each of the line heads 11C to 11R, and, for example, one recording head 17, two recording heads 17, or four or more recording heads 17 may be disposed in each of the line heads 11C to 11K.
In the above embodiment, both the operation panel 27 and the LED lamps 57C to 57R are used to indicate the states of the recording heads 17 and the waste ink collection containers 21C to 21R, but it is also possible to indicate the states by using either the operation panel 27 or the LED lamps 57C to 57R.
The present invention is usable in inkjet recording apparatuses that perform recording by ejecting ink from ink ejection nozzles provided in recording heads. With use of the present invention, it is possible to provide an inkjet recording apparatus in which an unused recording head and an unused waste ink collection container can be made effective use of.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-141439 | Aug 2021 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2022/032510 | 8/30/2022 | WO |
