The present application is based on, and claims priority from JP Application Serial Number 2022-164538, filed Oct. 13, 2022, the disclosure of which is hereby incorporated by reference herein in its entirety.
The present disclosure relates to a recording device such as a printer and a service life estimation method.
For example, JP-A-2015-175920 discloses an image forming apparatus that is an example of a recording device that forms an image on a recording material that is an example of a medium. The image forming apparatus includes a paper feeding cassette, a transport roller that is an example of a transport unit, and a sensor that is an example of a transport detection unit.
The paper feeding cassette accommodates a recording material. The transport roller transports a medium supplied from the paper feeding cassette along a transport passage that is an example of a transport path. The sensor detects the recording material transported along the transport passage. The image forming apparatus determines the degree of deterioration of the transport roller according to an arrival time that is an example of a transport time required for the recording material to reach the sensor.
The transport time varies depending on the deterioration of the transport unit, the deterioration of the transport detection unit, the state of the medium in the paper feeding cassette, and the like. Therefore, it is difficult to estimate the degree of deterioration of the transport detection unit and the degree of deterioration of the transport unit with high accuracy.
According to an aspect of the present disclosure, a recording device includes a recording unit that performs recording on a medium, a paper feeding cassette that accommodates the medium and is configured to be opened/closed, a transport unit that transports the medium accommodated in the paper feeding cassette along a transport path, a transport detection unit that detects the medium at a detection position provided at the transport path, a calculation unit that calculates a transport time required for the medium supplied from the paper feeding cassette to reach the detection position based on a result of detection by the transport detection unit, a determination unit that determines presence or absence of whether the paper feeding cassette is opened/closed, and an estimation unit that estimates a service life of the transport detection unit or the transport unit based on time information about the transport time and opening/closing information about determination of whether the paper feeding cassette is opened/closed.
According to another aspect of the present disclosure, a recording device includes a recording unit that performs recording on a medium, a paper feeding cassette that accommodates the medium and is configured to be opened/closed, a transport unit that transports the medium accommodated in the paper feeding cassette along a transport path, a transport detection unit that detects the medium at a detection position provided at the transport path, a calculation unit that calculates a transport time required for the medium supplied from the paper feeding cassette to reach the detection position based on a result of detection by the transport detection unit, a determination unit that determines presence or absence of opening/closing of the paper feeding cassette, a storage unit that stores time information about the transport time and opening/closing information about determination of whether the paper feeding cassette is opened/closed in association with each other, and an output unit that outputs the time information and the opening/closing information stored in the storage unit to an external device including an estimation unit configured to estimate a service life of the transport detection unit or the transport unit.
According to still another aspect of the present disclosure, a service life estimation method performed by a recording device including a recording unit that performs recording on a medium, a paper feeding cassette that accommodates the medium and is configured to be opened/closed, a transport unit that transports the medium accommodated in the paper feeding cassette along a transport path, and a transport detection unit that detects the medium at a detection position provided at the transport path, the method includes calculating a transport time required for the medium supplied from the paper feeding cassette to reach the detection position, determining presence or absence of whether the paper feeding cassette is opened/closed, and estimating a service life of the transport detection unit or the transport unit based on time information about the transport time and opening/closing information about determination of whether the paper feeding cassette is opened/closed.
An embodiment of a recording device and a service life estimation method will be described below with reference to the drawings. The recording device of the present embodiment is an ink jet printer that performs printing by ejecting ink that is an example of a liquid onto a medium such as a paper sheet, a fabric cloth, vinyl, a plastic part, or a metal part. In the drawing, assuming that a recording device 11 is placed on a horizontal plane, the direction of gravity is indicated by the Z axis and the directions along the horizontal plane are indicated by the X axis and the Y axis. The X axis, the Y axis, and the Z axis are orthogonal to each other.
As shown in
The paper feeding cassette 13 can accommodate the medium 21. The paper feeding cassette 13 can be inserted into and pulled out of the main body 12. Inserting the paper feeding cassette 13 into the main body 12 is also referred to as closing the paper feeding cassette 13. Pulling out the paper feeding cassette 13 from the main body 12 is also referred to as opening the paper feeding cassette 13. The paper feeding cassette 13 is configured to be opened/closed.
The paper feeding cassette 13 may accommodate a plurality of media 21 in a stacked state. The medium 21 can be set by opening the paper feeding cassette 13. The medium 21 can be fed by closing the paper feeding cassette 13.
The cassette detection unit 14 may detect the paper feeding cassette 13 in a closed state. It is possible to detect opening/closing of the paper feeding cassette 13 in a state where the recording device 11 is turned on.
The paper feeding cassette 13 may have a lift mechanism 24. The lift mechanism 24 can move the medium 21 up and down. The lift mechanism 24 is configured to perform a lift-up operation for lifting the medium 21. The lift mechanism 24 may include a lift motor 25, a hopper 26 and a retainer 27.
The hopper 26 is lifted by driving the lift motor 25. The hopper 26 is movable between a set position Ps indicated by a two-dot chain line in
The retainer 27 retains the hopper 26 at the supply position Pf. The retainer 27 releases retention of the hopper 26 as the paper feeding cassette 13 is opened. That is, when the paper feeding cassette 13 is opened, the hopper 26 moves to the set position Ps by its own weight. Therefore, the user can place the medium 21 on the hopper 26 positioned at the set position Ps by opening the paper feeding cassette 13. When the paper feeding cassette 13 is closed, the lift motor 25 lifts the hopper 26 positioned at the set position Ps, and the retainer 27 retains the hopper 26 at the supply position Pf.
The lift detection unit 15 may detect the lift mechanism 24 at the supply position Pf. Specifically, the lift detection unit 15 can detect the hopper 26 at the supply position Pf. The lift detection unit 15 may detect that the retainer 27 retains the hopper 26 at the supply position Pf. The lift detection unit 15 may be, for example, an optical sensor or a contact sensor. The lift detection unit 15 may detect that the hopper 26 has moved from the set position Ps to the supply position Pf by detecting the number of rotations of the lift motor 25 using, for example, a rotary encoder.
The feeding unit 16 feeds the media 21 accommodated in the paper feeding cassette 13 one by one to the transport path 22 from the paper feeding cassette 13. The feeding unit 16 may include a feed roller 29 and a separation unit 30.
The feed roller 29 feeds the medium 21 to the transport path 22 by rotating in a state of pinching the medium 21 between the feed roller 29 and the hopper 26. The feed roller 29 feeds the uppermost medium 21 among the media 21 accommodated in the paper feeding cassette 13. The separation unit 30 separates the media 21 fed in a stacked state one by one. The separation unit 30 holds back the second and subsequent media 21 from the top in the paper feeding cassette 13.
The transport unit 17 transports the medium 21 accommodated in the paper feeding cassette 13 along the transport path 22. The transport unit 17 transports the medium 21 in a transport direction Dc. The transport direction Dc is a direction along the transport path 22. The transport direction Dc is a direction from the paper feeding cassette 13 toward the stacker 20. The transport unit 17 may include one or more transport rollers 32, an endless transport belt 33, and a pair of pulleys 34.
The transport rollers 32 transport the medium 21 along the transport path 22 by rotating in a state of pinching the medium 21. The transport roller 32 discharges the printed medium 21 to the stacker 20. The stacker 20 receives the transported medium 21.
The transport belt 33 is stretched over the pair of pulleys 34. The transport belt 33 faces the recording unit 19 with the transport path 22 interposed therebetween. The transport belt 33 supports a portion of the medium 21 in a flat state. The transport belt 33 transports the medium 21 by rotating in a state where the medium 21 is attracted.
The recording unit 19 may have a plurality of nozzles 37 for ejecting a liquid. The recording unit 19 may have a nozzle face 38 in which the plurality of nozzles 37 is opened. The recording unit 19 may have the nozzle face 38 inclined with respect to the horizontal plane. The recording unit 19 performs printing on the medium 21 by ejecting a liquid onto the medium 21 supported by the transport belt 33. Printing is one means of recording information. The recording unit 19 of the present embodiment records on the medium 21 by printing. The recording unit 19 may be of a line type that performs printing by ejecting a liquid onto the medium 21 transported in a state where the medium 21 is stationary. The recording unit 19 may be of a serial type that performs printing by ejecting a liquid while moving.
The transport detection unit 18 detects the medium 21 at detection positions provided at the transport path 22. The recording device 11 may include a plurality of transport detection units 18. The plurality of transport detection units 18 detects the medium 21 at different detection positions.
The transport detection unit 18 may be a reflective optical sensor that includes, for example, a light projecting unit (not shown) and a light receiving unit (not shown) and detects light reflected by the medium 21. The light projecting unit and the light receiving unit may be provided with the transport path 22 interposed therebetween. The transport detection unit 18 may be a transmissive optical sensor that detects the medium 21 when light is blocked. The transport detection unit 18 may be a contact sensor that detects the medium 21 by contacting the transported medium 21.
As shown in
The recording device 11 may include a controller 43, a storage unit 44, an operation unit 45, a calculation unit 46, a determination unit 47, an estimation unit 48 and an output unit 49. The controller 43 comprehensively controls driving of respective mechanisms in the recording device 11 and controls various operations performed in the recording device 11. The controller 43 may control the lift mechanism 24 based on the result of detection by the lift detection unit 15. The controller 43 can be configured as a circuit including a: one or a plurality of processors that performs various processes according to computer programs, one or a plurality of dedicated hardware circuits that performs at least part of the various processes, or y: a combination thereof. The hardware circuit is, for example, an application specific integrated circuit. The processor includes a CPU and a memory such as a RAM and a ROM, and the memory stores a program code or an instruction configured to cause the CPU to execute a process. The memory, that is, a computer-readable medium, includes any readable medium that can be accessed by a general-purpose or dedicated computer.
The storage unit 44 is, for example, a memory such as the RAM and the ROM described above. The storage unit 44 may be provided separately from the controller 43 or may be included in the controller 43. The storage unit 44 stores various programs and various parameters. The controller 43 may function as the calculation unit 46, the determination unit 47 and the estimation unit 48 by executing programs stored in the storage unit 44. The function of at least one of the calculation unit 46, the determination unit 47, and the estimation unit 48 may be implemented by the computer 41 executing a program.
The operation unit 45 may have a button, a panel, a switch, and the like for performing various operations of the recording device 11. The output unit 49 may be capable of outputting information about the recording device 11. The output unit 49 may be a display capable of outputting information in the form of an image, a video, a character, or the like. The output unit 49 and the operation unit 45 may be configured integrally like a touch panel, for example. The output unit 49 may be a speaker capable of outputting information by voice, sound, or the like. The output unit 49 may be a light equipment capable of outputting information with light. The light equipment may output information, for example, by illuminating a corresponding label. The output unit 49 may be a communication device that outputs information to a device other than the recording device 11, or a coupling terminal that couples a communication cable for communication. For example, the output unit 49 may transmit information to the computer 41. The recording unit 19 may output information by perform printing on the medium 21 or the like. In this case, the recording unit 19 functions as the output unit 49.
The estimation routine shown in
As shown in
When the hopper 26 is not at the supply position Pf, NO is selected in step S101, and the controller 43 shifts the process to step S103. In step S103, the controller 43 sets the opening/closing flag to 1. In step S104, the controller 43 performs a lift-up operation. That is, the controller 43 drives the lift motor 25 to lift the hopper 26.
In step S105, the controller 43 determines whether the hopper 26 has moved to the supply position Pf based on the result of detection by the lift detection unit 15. When the hopper 26 is not at the supply position Pf, NO is selected in step S105, and the controller 43 performs the lift-up operation until the hopper 26 moves to the supply position Pf. When the hopper 26 has moved to the supply position Pf, YES is selected in step S105, and the controller 43 shifts the process to step S106.
In step S106, the controller 43 determines whether the supply of the medium 21 set in the paper feeding cassette 13 has started. When the supply of the medium 21 has not started, NO is selected in step S106, and the controller 43 shifts the process to step S101. When the supply of the medium 21 is started, YES is selected in step S106, and the controller 43 shifts the process to step S107.
In step S107, the controller 43 determines whether the paper feeding cassette 13 is opened/closed. The controller 43 may cause the determination unit 47 to determine whether the paper feeding cassette 13 is opened/closed. The determination unit 47 determines presence or absence of opening/closing of the paper feeding cassette 13. When the opening/closing flag is 0, the determination unit 47 determines that the paper feeding cassette 13 is not opened/closed. When the opening/closing flag is 1, the determination unit 47 determines that the paper feeding cassette 13 has been opened/closed.
In step S108, the controller 43 drives the feeding unit 16. In step S109, the controller 43 drives the transport unit 17. In step S110, the controller 43 determines whether the transport detection unit 18 has detected the medium 21. When the transport detection unit 18 detects the medium 21, YES is selected in step S110, and the controller 43 shifts the process to step S111. In step S111, the controller 43 calculates the transport time. The controller 43 may cause the calculation unit 46 to calculate the transport time.
In step S112, the controller 43 stores the time information about the transport time and the opening/closing information about determination of whether the paper feeding cassette 13 is opened/closed in the storage unit 44 in association with each other. The opening/closing information may include the result of determination by the determination unit 47, and may include the opening/closing flag.
In step S113, the controller 43 estimates the service life of the transport detection unit 18 or the transport unit 17. The controller 43 may cause the estimation unit 48 to estimate the service life. The estimation of the service life may be performed each time the transport time is calculated, or may be performed at regular intervals.
In step S110, when the leading edge of the medium 21 has not reached the detection position, the transport detection unit 18 does not detect the medium 21, so that NO is selected in step S110, and the controller 43 shifts the process to step S114.
In step S114, the controller 43 determines whether the threshold value time has passed since the feeding unit 16 started to be driven. When the threshold value time has not elapsed, NO is selected in step S114, and the controller 43 shifts the process to step S110. The controller 43 waits until the transport detection unit 18 detects the medium 21 or until the threshold value time elapses.
When the threshold value time elapses, YES is selected in step S114, and the controller 43 shifts the process to step S115. In step S115, the controller 43 stops driving of the feeding unit 16 and the transport unit 17. In step S116, the controller 43 causes the output unit 49 to output the fact that a transport error such as jamming has occurred, and ends the estimation routine.
The action of the present embodiment will be described. As shown in
When the paper feeding cassette 13 is closed in a state where the recording device 11 is turned on, the lift mechanism 24 lifts the hopper 26. The lift mechanism 24 drives the lift motor 25 to perform a lift-up operation when the hopper 26 is not at the supply position Pf.
The lift mechanism 24 retains the hopper 26 at the supply position Pf during a time when the paper feeding cassette 13 is closed. The retention of the hopper 26 and the release of the retention by the retainer 27 are executed regardless of the power supply of the recording device 11. Therefore, even after the recording device 11 is turned off, the retainer 27 retains the hopper 26 at the supply position Pf. When the paper feeding cassette 13 is opened in a state where the recording device 11 is turned off, the retainer 27 releases the retention of the hopper 26 and lowers the hopper 26.
Power is required for the lift-up operation. When the paper feeding cassette 13 is closed during a time when the recording device 11 is turned off, the lift mechanism 24 performs a lift-up operation at the timing when the recording device 11 is turned on. That is, when the paper feeding cassette 13 is opened/closed during a time when the recording device 11 is turned off, the hopper 26 is positioned at the set position Ps at the time when the recording device 11 is turned on. When the paper feeding cassette 13 is not opened/closed during a time when the recording device 11 is turned off, the hopper 26 is retained at the supply position Pf at the time when the recording device 11 is turned on. Therefore, no lift-up operation is required.
The determination unit 47 may determine presence or absence of opening/closing of the paper feeding cassette 13 during a time when the recording device 11 is turned off based on whether the lift-up operation is performed at the time when the recording device 11 is turned on. When the lift-up operation is not performed at the time when the power is turned on, the determination unit 47 may determine that the paper feeding cassette 13 is not opened/closed during a time when the power is turned off. When the lift-up operation is performed at the time when the power is turned on, the determination unit 47 may determine that the paper feeding cassette 13 is opened/closed during a time when the power is turned off.
When printing starts, the feeding unit 16 feeds the medium 21. The controller 43 may determine that the medium 21 is jammed in the transport path 22 when the transport detection unit 18 does not detect the medium 21 even after a threshold value time has elapsed since the feeding unit 16 was driven. When the recording device 11 includes a plurality of transport detection units 18, the threshold value time may be set for each transport detection unit 18.
When the transport detection unit 18 detects the medium 21, the calculation unit 46 calculates the transport time. The calculation unit 46 calculates the transport time required for the medium 21 supplied from the paper feeding cassette 13 to reach the detection position based on the result of detection by the transport detection unit 18. The transport time may be the time from when the feeding unit 16 starts driving until when the transport detection unit 18 detects the leading edge of the medium 21. When the recording device 11 includes a plurality of transport detection units 18, the calculation unit 46 may calculate the transport time for each transport detection unit 18.
The estimation unit 48 estimates the service life of the transport detection unit 18 or the transport unit 17 based on the time information and the opening/closing information. The estimation unit 48 may estimate the service life by comparing the transport time with the estimated time. The estimated time may be stored in the storage unit 44 in advance. The estimation unit 48 may estimate that the transport detection unit 18 or the transport unit 17 is close to the end of its service life when the transport time exceeds the estimated time. The estimation unit 48 may estimate the time when the transport time exceeds the estimated time from the information stored in the storage unit 44.
When the transport detection unit 18 deteriorates, the transport time longer than the actual time is detected due to the delay in response of the transport detection unit 18. When the transport unit 17 deteriorates, the transport time increases due to an increase in the slippage of the transport roller 32 with respect to the medium 21 and a decrease in the amount of feed that the transport roller 32 can feed in one rotation. The transport time also increases when the medium 21 is not properly set in the paper feeding cassette 13 or when the medium 21 is displaced due to the impact of opening/closing the paper feeding cassette 13.
Therefore, the estimation unit 48 may estimate the service life when the paper feeding cassette 13 is not opened/closed during a time when the recording device 11 is turned off. When estimating the service life, the estimation unit 48 may exclude the transport time after the paper feeding cassette 13 is opened/closed.
Effects of the present embodiment will be described.
The present embodiment can be implemented with the following modifications. The present embodiment and the following modifications can be implemented in combination with one another as long as there is no technical contradiction.
As used herein, the expression “at least one” means “one or more” of the desired option. As an example, the expression “at least one” as used herein means “only one option” or “both of the two options” when the number of options is two. As another example, the expression “at least one” used herein means “only one option” or “any combination of two or more options” when the number of options is three or more.
In the following, technical ideas and their functions and effects which are grasped from the above-described embodiments and modifications will be described.
The state of the medium in the paper feeding cassette may change as the paper feeding cassette is opened/closed. According to this configuration, the estimation unit estimates the service life of the transport detection unit or the transport unit based on the opening/closing information related to opening/closing of the paper feeding cassette in addition to the time information related to the transport time. Therefore, it is possible to improve the accuracy of estimating the degree of deterioration of the transport detection unit or the transport unit.
According to this configuration, the determination unit determines presence or absence of whether the paper feeding cassette is opened/closed during a time when the power is turned off based on whether the lift-up operation is performed at the time when the power is turned on. In general, the lift mechanism keeps the medium ready to be supplied by moving up to the supply position. However, when the lift mechanism is positioned at the supply position Pf, the medium may interfere with opening/closing of the paper feeding cassette. Therefore, the lift mechanism lowers the medium by moving to the set position below the supply position as the paper feeding cassette is opened. Since the lift mechanism moves from the supply position to the set position by its own weight, the lift mechanism can move even in a state where the recording device is not turned on. However, the lift mechanism cannot move from the set position to the supply position in a state where the recording device is not turned on. The lift mechanism performs a lift-up operation at the time when the recording device is turned on. Presence or absence of whether the paper feeding cassette is opened/closed is correlated with whether the lift-up operation is performed. That is, when the paper feeding cassette is not opened/closed, the lift mechanism is positioned at the supply position, so that the lift-up operation is not performed. When the paper feeding cassette has been opened/closed, the lift mechanism is positioned at the set position, so that a lift-up operation is performed. Therefore, since whether the lift-up operation is performed is used for determining whether the paper feeding cassette is opened/closed, the recording device of the present embodiment can suppress an increase in the number of parts, compared with a recording device in which a separate mechanism for grasping the state of the paper feeding cassette is provided.
According to this configuration, the controller controls the lift mechanism based on the result of detection by the lift detection unit. Therefore, the present embodiment can save the user's labor, compared with the case where the user operates the lift mechanism.
According to this configuration, the same effects as those of the recording device can be obtained.
According to this method, the effects same as those of the recording device can be obtained.
Number | Date | Country | Kind |
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2022-164538 | Oct 2022 | JP | national |