JP2018083333A - Ink jet printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heat quickly a recording medium attached to a printer.SOLUTION: An ink jet printer includes a printing part for printing on a recording medium by discharging ink, a heater for heating the recording medium, a control part for controlling action of the heater according to a preset temperature, a medium sensor for detecting that the recording medium is removed, and a setting part for raising the preset temperature when the recording medium is removed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inkjet printer.

  In order to improve the printing quality of an inkjet printer, the recording medium before and after printing is heated. For example, Patent Document 1 discloses a technique in which a preheater and a print heater are provided in an ink jet printer to accurately heat the surface temperature of a recording medium to a desired temperature.

Japanese Patent No. 4889059

  However, in an ink jet printer that heats the surface temperature of a recording medium to a desired temperature as in Patent Document 1, printing is not started until the recording medium reaches a desired temperature. Is cooler than the desired temperature, and there is a waiting time before printing can be started.

  The present invention has been made in view of such a background, and an object thereof is to provide an ink jet printer capable of quickly heating a recording medium attached to the printer.

A main invention of the present invention for solving the above problems is an ink jet printer, wherein a printing unit that discharges ink to print on a recording medium, a heater that heats the recording medium, and the temperature according to a set temperature A control unit that controls the operation of the heater, a medium sensor that detects that the recording medium has been removed, and a setting unit that raises the set temperature when the recording medium is removed are provided.
Other problems and solutions to be disclosed by the present application will be made clear by the embodiments of the invention and the drawings.

  According to the present invention, a recording medium attached to a printer can be quickly heated.

1 is a perspective view for explaining a schematic configuration of a printer 10 according to the present embodiment. It is explanatory drawing which shows the principal part of the printer 10 which concerns on the AA line cross section of FIG. 4 is a diagram for explaining a main part related to temperature control of a preheater 51 and a print heater 52. FIG. It is a state transition diagram of the temperature regulator 60. 6 is a state transition diagram of a temperature regulator 60 according to a normal control mode 71. FIG. It is a state transition diagram of the temperature regulator 60 according to the boost control mode 72. 3 is a diagram for explaining a temperature change after the recording medium 30 is removed from the printer 10. FIG.

== Summary of Invention ==
From the description of the specification and the drawings, at least the following matters will become clear.

  That is, a printing unit that discharges ink to print on a recording medium, a heater that heats the recording medium, a control unit that controls the operation of the heater according to a set temperature, and the recording medium are removed. An ink jet printer comprising: a medium sensor that detects the above and a setting unit that raises the set temperature when the recording medium is removed is clarified.

  The temperature of the newly installed recording medium is lower than the set temperature, and the recording medium stored in a warehouse colder than the use atmosphere of the printer is further cooled. According to the ink jet printer, when the recording medium is removed, the set temperature of the heater for heating the recording medium can be raised. Therefore, it is possible to quickly heat a newly installed low-temperature recording medium, and it is possible to shorten the time until the recording medium is heated to a desired temperature.

  In addition, the members of the ink jet printer that supports the recording medium are generally easier to cool than the recording medium such as paper, and when the recording medium is removed, the cooling rapidly proceeds. In a state where the heater has already been heated to the set temperature and the heater has been turned off, the general temperature control method does not turn on the heater immediately after the recording medium is removed, but turns it on when the temperature drops to a certain level. It takes time to return to the set temperature. According to the ink jet printer of the present invention, the set temperature can be raised when the recording medium is removed. Therefore, the heater is turned on immediately, and the cooling of the printer can be mitigated. Therefore, it is possible to shorten the time from when a new recording medium is attached to when the recording medium is heated to a desired temperature.

  In addition, the ink jet printer is characterized in that the setting unit changes the degree of raising the set temperature according to the thickness of the recording medium. The thicker the recording medium, the more heat is taken from the printer when it is attached to the printer. According to the ink jet printer of the present invention, when the recording medium to be attached is thick, it can be heated to a higher set temperature before attachment. Therefore, the temperature drop due to the attachment of the recording medium can be mitigated. Therefore, it is possible to shorten the time from when a new recording medium is attached to when the recording medium is heated to a desired temperature.

  In addition, an ink jet printer including an air temperature sensor for measuring an outside air temperature, wherein the setting unit changes a degree of raising the set temperature according to the outside air temperature is clarified. When the atmosphere of the printer is cold, the degree to which the printer is cooled when the recording medium is removed is increased. According to the ink jet printer of the present invention, the set temperature can be raised according to the outside air temperature. Therefore, the cooling of the printer due to the removal of the storage medium can be mitigated. Therefore, it is possible to shorten the time from when a new recording medium is attached to when the recording medium is heated to a desired temperature.

  In addition, an air temperature sensor that measures an outside air temperature is provided, the heater can change an output, and the control unit controls the heater so as to change the output according to the outside air temperature. An inkjet printer becomes apparent. When the atmosphere of the printer is cold, the degree to which the printer is cooled when the recording medium is removed is increased. According to the ink jet printer, the output amount of the heater can be adjusted according to the outside air temperature. Therefore, the cooling of the printer due to the removal of the storage medium can be mitigated. Therefore, it is possible to shorten the time from when a new recording medium is attached to when the recording medium is heated to a desired temperature.

  In addition, the inkjet apparatus includes a time zone storage unit that stores a time zone with low printing frequency, and the setting unit lowers the set temperature when the current time is included in the time zone. The printer becomes clear. In this case, the operation of the heater can be suppressed during a time period when printing is not performed much. Therefore, power consumption applied to the heater can be suppressed.

== Embodiment ==
An ink jet printer (hereinafter abbreviated as “printer”) 10 according to an embodiment of the present invention will be described below. FIG. 1 is a perspective view for explaining a schematic configuration of a printer 10 according to the present embodiment. FIG. 2 is an explanatory diagram illustrating a main part of the printer 10 according to a cross section taken along line AA in FIG.

  The printer 10 includes a base portion 12 supported by leg portions 11. Ends 13 and 14 in the longitudinal direction (main scanning direction) of the base 12 are connected by a wall 15. A guide rail 16 is provided on the wall 15 in the longitudinal direction of the wall 15. A wire 17 is disposed in parallel with the guide rail 16. A carriage 21 is slidably attached to the wire 17. An ink head 22 is attached to the carriage 21. The ink head 22 travels in the main scanning direction, and ejects ink to the recording medium 30 placed on the platen 40. As a result, printing is performed.

  As shown in FIG. 2, a driving roller 41 and a pinch roller 42 are disposed so as to face the upper and lower sides in the vertical direction. The pinch roller 42 is urged so as to contact the drive roller 41. The recording medium 30 is sandwiched between the pinch roller 42 and the driving roller 41. As the driving roller 41 rotates, the recording medium 30 is transported in the transport direction orthogonal to the main scanning direction. The recording medium 30 wound in a roll shape (hereinafter, the recording medium wound in a roll shape before being placed on the platen 40 is particularly referred to as “roll 31”) is transported on the platen 40 by the recording medium 30. It is detachably disposed behind the direction (conveying direction). In this embodiment, it is assumed that the roll 31 has the recording medium 30 wound around a rod-shaped core portion 32. A sensor (hereinafter referred to as “medium sensor”) 55 that detects attachment / detachment of the roll 31 is disposed on a support portion (not shown) on which the core portion 32 is supported. As will be described later, in the printer 10 of the present embodiment, when the removal of the roll 31 is detected by the medium sensor 55, the temperature control operation mode is changed.

  Below the platen 40 in the vertical direction, a pre-heater 51 is provided upstream of the ink head 22 in the transport direction, and a print heater 52 is provided downstream of the ink head 22 in the transport direction. The preheater 51 preheats the recording medium 30 to be conveyed. The print heater 52 heats the recording medium 30 after the ink ejected from the ink head 22 has landed. When the recording medium 30 is heated by the preheater 51 and the print heater 52, the drying of the ink is promoted. This improves the print quality. The printer 10 prevents printing until the surface temperature of the recording medium 30 reaches a set temperature.

  The surface temperature of the recording medium 30 is measured by temperature sensors 53 and 54. The temperature sensor 53 is provided in the vicinity of the preheater 51, and the temperature sensor 54 is provided in the vicinity of the print heater 52. In the present embodiment, the temperature sensors 53 and 54 are provided on the side of the platen 40 on which the recording medium 30 is disposed so as to face the preheater 51 and the print heater 52 with the platen 40 interposed therebetween. The temperature sensors 53 and 54, the preheater 51, and the print heater 52 may be provided on the same side. In this case, the temperature sensors 53 and 54 measure the temperature of the platen 40 and indirectly measure the temperature of the recording medium 30.

  The preheater 51 and the print heater 52 are temperature controlled by a temperature controller 60. FIG. 3 is a diagram for explaining a main part related to temperature control of the preheater 51 and the print heater 52. The temperature controller 60 controls the operations of the preheater 51 and the print heater 52 via the power operation unit 61 according to the measured temperature output from the temperature sensors 53 and 54. In the present embodiment, the power operator 61 is an electromagnetic switch, and the control unit 603 performs ON / OFF control.

  The temperature controller 60 includes a setting unit 601, a storage unit 602, and a control unit 603. The setting unit 601 receives an input of a temperature that is a target for temperature adjustment (hereinafter referred to as “set temperature”). The setting unit 601 may be configured to accept an input of a set temperature from an input device such as a button provided in the printer 10, for example, or connected to an external device so as to be able to communicate with the external device and receive the set temperature from the external device. You may comprise. Storage unit 602 is, for example, a nonvolatile memory, and stores the set temperature received by setting unit 601. The storage unit 602 also stores a time (hereinafter referred to as “timeout time”) for operating in a boost control mode to be described later. It is assumed that the timeout time is stored in the storage unit 602 in advance. The control unit 603 controls the operations of the preheater 51 and the print heater 52. As described above, the control unit 603 turns the pre-heater 51 and the print heater 52 on and off by giving a signal to the power controller 61. In the printer 10 of this embodiment, the temperature controller 60 changes the operation mode according to the attachment / detachment of the recording medium 30.

  FIG. 4 is a state transition diagram of the temperature controller 60. Note that the temperature controller 60 controls each of the preheater 51 and the print heater 52 independently, and here, an operation related to the preheater 51 will be described.

  The temperature controller 60 operates in two operation modes, a normal control mode 71 and a boost control mode 72. The temperature controller 60 operates in the normal control mode 71 as a normal state.

  FIG. 5 is a state transition diagram of the temperature regulator 60 according to the normal control mode 71. The normal control mode 71 is so-called ON / OFF control. In the normal control mode 71, the preheater 51 is off as an initial state (711). When a transition is made from a boost control mode 72 described later, the on / off state of the preheater 51 depends on the state of the preheater 71 in the boost control mode 72. The control unit 603 compares the measured temperature measured by the temperature sensor 53 with the set temperature stored in the storage unit 602, and sets the measured temperature to a predetermined value (1 ° C. in this embodiment) from the set temperature. If it is lower than 712 (712), the preheater 51 is turned on (713). In addition, when the measured temperature measured by the temperature sensor 53 is equal to or higher than the set temperature (714), the control unit 603 turns off the preheater 51 (711).

  When the medium sensor 55 detects the removal of the recording medium 30 when the preheater 51 is on (711) (715) and when the preheater 51 is off (711), the medium sensor 55 detects the removal of the recording medium 30 In the case (716), returning to FIG. 4, the setting unit 601 adds a predetermined value (1 ° C. in the present embodiment) to the set temperature and writes it to the storage unit 602, and the temperature controller 60 shifts to the boost control mode 72. (73).

  FIG. 6 is a state transition diagram of the temperature regulator 60 according to the boost control mode 72. The boost control mode 72 performs ON / OFF control in the same manner as the normal control mode 71, but the control is performed in a state where the set temperature has increased by a predetermined value (1 ° C. in the present embodiment).

  When transitioning to the boost control mode 72, the control unit 603, as in the normal control mode 71, sets the measured temperature measured by the temperature sensor 53 in the state (721) in which the preheater 51 is off to the set temperature (in the normal control mode 71 When the temperature is lower than a predetermined value (1 ° C. in the present embodiment) by more than a preset temperature (a temperature obtained by adding 1 ° C.), the preheater 51 is turned on (722), and the preheater 51 is turned on (723). When the temperature exceeds the set temperature, the preheater 51 is turned off (724).

  When the preheater 51 is off (721), the medium sensor 55 detects the attachment of the recording medium 30 (725), and when the preheater 51 is on (723), the medium sensor 55 attaches the recording medium 30. 4 is returned to FIG. 4, the setting unit 601 subtracts a predetermined value (1 ° C. in the present embodiment) from the set temperature and writes it to the storage unit 602, and the temperature regulator 60 operates in the normal control mode 71. (74). Also, when a predetermined time-out occurs when the preheater 51 is off (721) (727), and when a predetermined time-out occurs when the preheater 51 is on (723) (728). 4, the setting unit 601 subtracts a predetermined value (1 ° C. in the present embodiment) from the set temperature and writes it in the storage unit 602, and the temperature controller 60 shifts to the normal control mode 71 (75).

  As described above, in the normal control mode 71, the temperature controller 60 performs the ON / OFF control of the preheater 51 so that the measured temperature measured by the temperature sensor 53 approaches the preset first set temperature. In the boost control mode 72 that is performed when the recording medium 30 is removed, the second setting is such that the measured temperature measured by the temperature sensor 53 is higher than the first set temperature by a predetermined temperature (for example, 1 ° C.). The ON / OFF control of the preheater 51 is performed so as to approach the temperature. The print heater 52 is also subjected to the same processing as the preheater 51 using the temperature sensor 54.

  Various members such as the platen 40 that supports the recording medium 30 are easier to cool than the recording medium 30 such as recording paper. Therefore, when the recording medium 30 is removed, the cooling rapidly proceeds. However, when the measured temperature measured by the temperature sensors 53 and 54 is the set temperature, the preheater 51 and the print heater 52 are turned off. Therefore, even if the recording medium 30 is removed in this state, the preheater 51 and The print heater 52 is not turned on. The pre-heater 51 and the print heater 52 are turned on when the measured temperature is lowered from the set temperature by a predetermined temperature (1 ° C. in this embodiment). For this reason, it takes time to return the temperature of the platen 40 to the set temperature. However, according to the printer 10 of the present embodiment, the set temperature is raised when the recording medium 30 is removed. Therefore, as soon as the recording medium 30 is removed, the preheater 51 and the print heater 52 are turned on, and the cooling of the platen 40 can be mitigated. Therefore, even if a new recording medium 30 is attached thereafter, the time until the recording medium 30 is heated to a desired temperature can be shortened.

  FIG. 7 is a diagram for explaining the temperature change after the recording medium 30 is removed from the printer 10. A solid line 81 indicates an operation of the printer 10 according to the present embodiment, that is, a temperature change when the temperature controller 60 operates in the boost control mode 72 after the recording medium 30 is removed. On the other hand, an alternate long and short dash line 82 indicates a change in temperature in a general inkjet printer operation, that is, when the temperature controller 60 operates only in the normal control mode 71 (without the boost control mode 72). Here, when the pre-heater 51 and the print heater 52 are off, the temperature decreases by 0.3 ° C. per unit time, and when the print heater 51 and the print heater 52 are on, 0.1 ° C. per unit time. Assume a falling environment. When the storage medium 30 is removed at the time t1, when the temperature controller 60 operates only in the normal control mode 71 as in a normal ink jet printer, the temperature sensors 53 and 54 are used as indicated by the alternate long and short dash line 82. Since the measurement temperature is 40 ° C., the preheater 51 and the print heater 52 remain off. Therefore, the preheater 51 and the print heater 52 are turned on at a time t2 when the temperature is cooled by 0.3 ° C. per unit time and is lowered by 1 ° C. or more from the set temperature of 40 ° C. On the other hand, in the printer 10 of this embodiment, when the recording medium 30 is removed, the setting unit 601 raises the set temperature by 1 ° C. Therefore, even if the temperature measured by the temperature sensors 53 and 54 is 40 ° C., the control unit 603 determines that the temperature is lowered by 1 ° C. from the set temperature. Therefore, the preheater 51 and the print heater 52 are turned on. Thereby, as the solid line 81 shows, it can cool only 0.1 degreeC per unit time. The degree of cooling of the printer 10 of the present embodiment is moderate at least from the time t1 to the time t2, as compared with a normal ink jet printer. When the recording medium 30 is attached at time t3, the recording medium 30 is heated and the surface temperature similarly rises in both the printer 10 of the present embodiment and the ordinary inkjet printer. In the printer 10 of this embodiment, the surface temperature of the recording medium 30 reaches the set temperature of 40 ° C. at time t4, and printing is possible, whereas in a normal ink jet printer, printing is possible at time t5. As described above, according to the printer 10 of the present embodiment, it is possible to shorten the time from when the new recording medium 30 is attached to the printer 10 until the recording medium 30 is heated to the set temperature. Therefore, printing can be started quickly.

  Further, even when the recording medium 30 is stored in a cold warehouse or the like, according to the printer 10 of the present embodiment, the cooling of the platen 40 is suppressed, so that the low-temperature recording medium 30 can be quickly moved. Can be heated to a set temperature.

  In addition, if a powerful heater is used for the preheater 51 and the printer heater 52, the recording medium 30 can be rapidly heated, but such a heater is expensive. However, according to the printer 10 of the present embodiment, even with an inexpensive heater, the time required for heating the recording medium 30, that is, the waiting time for printing can be shortened.

== Modification ==
In the printer 10 of this embodiment, the preset temperature is raised by a predetermined temperature (1 ° C.) in the boost control mode 72, but the setting unit 601 changes the temperature at which the set temperature is raised according to the thickness of the recording medium 30. May be. For example, the setting unit 601 receives an input of the thickness of the recording medium 30 (or information indicating the thickness of thick paper, plain paper, etc.) and writes it in the storage unit 602, and the medium sensor 55 removes the recording medium 30. When detected, the temperature corresponding to the thickness can be added to the set temperature. The setting unit 601 can add a larger temperature as the thickness is larger. The thicker the recording medium 30 is, the more heat is taken from the printer 10 when it is attached to the printer. Therefore, by heating the recording medium 30 to a higher set temperature as the thickness of the recording medium 30 increases, the temperature drop due to the attachment of the recording medium 30 can be alleviated and the printing waiting time can be shortened.

  Further, the timeout time may be changed according to the thickness of the recording medium 30. For example, the setting unit 601 can write a longer timeout time in the storage unit 602 as the recording medium 30 is thicker. In this case, a decrease in the temperature of the platen 40 can be suppressed in preparation for disposing the thick recording medium 30 that takes heat away.

  When the outputs of the preheater 51 and the print heater 52 are adjustable, the outputs of the preheater 51 and the print heater 52 may be increased instead of raising the set temperature or in addition to raising the set temperature. For example, the setting unit 601 writes “50%” output to the storage unit 602 during operation in the normal control mode 71, and writes “100%” output to the storage unit 602 during operation in the boost control mode 72. The control unit 603 can control the preheater 51 and the print heater 52 so as to operate with the output stored in the storage unit 602. In this case, since the cooling of the printer 10 can be further eased or prevented, the printing waiting time can be further shortened.

  Further, when adjusting the output of the preheater 51 and the print heater 52 in addition to raising the set temperature, it does not shift to the normal control mode 71 at time-out (FIGS. 6, 727 and 728), and the set temperature remains raised. Only the output may be lowered. For example, the setting unit 601 can keep the set temperature unchanged while writing an output of “50%” in the storage unit 602 at the time of timeout. In this case, the print load waiting time can be shortened by suppressing the temperature drop of the platen 40 while reducing the heater load due to the increase in the output of the heater to prevent the heater from malfunctioning and overheating.

  Further, the printer 10 may be provided with an air temperature sensor that measures the atmosphere (outside air temperature) of the printer 10, and the setting unit 601 may change the temperature at which the set temperature is raised according to the outside air temperature. The setting unit 601 adds a larger temperature as the outside air temperature is lower. When the atmosphere of the printer 10 is cold, the degree to which the printer 10 is cooled when the recording medium 30 is removed increases. Therefore, by raising the set temperature according to the outside air temperature, the cooling of the printer 10 due to the removal of the storage medium can be eased, and the printing waiting time can be shortened.

  The setting unit 601 may determine a timeout time according to the temperature measured by the temperature sensor, and write the determined timeout time in the storage unit 602. For example, the setting unit 601 can set a longer timeout time as the temperature is lower. In this case, it is possible to prevent the preheater 51 and the print heater 52 from being turned off due to a timeout in a situation where the temperature is low and the platen 40 is easily cooled, thereby shortening the printing waiting time.

  When the outputs of the preheater 51 and the print heater 52 are adjustable, instead of raising the set temperature according to the outside temperature, or in addition to raising the set temperature according to the outside temperature, the preheater according to the outside temperature. The output of 51 and the print heater 52 may be increased. In this case, since the cooling of the printer 10 can be further eased or prevented, the printing waiting time can be further shortened.

  In addition, the storage unit 603 (corresponding to the “time zone storage unit” of the present invention) stores a time zone with a low printing frequency, and the setting unit 601 acquires the current time from a clock or the like, and the current time Is included in the time zone, a temperature obtained by lowering a predetermined temperature (for example, 1 ° C.) from the set temperature is written in the storage unit 602. In the boost control mode 72, the operations of the preheater 51 and the print heater 52 are performed. You may make it suppress. In this case, power consumption applied to the heater can be suppressed without impairing user convenience. Here, when the current time is a predetermined time before the end time of the time zone, the setting unit 601 sets the set temperature to a temperature higher than the original value (for example, 2 ° C. is added), and the platen 40 You may make it heat. In this case, it is possible to prevent the printing waiting time from becoming long at the timing when the printing frequency increases.

  In addition, the printer 10 includes a print history storage unit that records a history of printing times in the storage unit 602, a time zone specifying unit that specifies a time zone with a low printing frequency from the history and writes the time zone in the storage unit 602. You may make it provide. In this case, since it is possible to automatically learn a time zone with a low printing frequency, it is possible to suppress the power consumption of the heater without impairing the convenience of the user while simplifying the setting.

  Further, instead of lowering the set temperature or in addition to lowering the set temperature, the timeout time may be changed according to the time zone. For example, when changing the timeout time instead of lowering the set temperature, the setting unit 601 can shorten the timeout time when the current time is included in a time zone with a low printing frequency. In this case, since the time for operating in the boost control mode 72 after the platen 40 is sufficiently cooled can be shortened, the power consumption related to the heater can be suppressed. Further, when changing the timeout time in addition to lowering the set temperature, the setting unit 601 can lengthen the timeout time when the current time is included in a time zone with a low printing frequency. In this case, it is possible to prevent the operation in the boost control mode 72, which is expected to have a shorter heater ON time than the normal control mode 71, from being terminated due to a timeout.

  Although the present embodiment has been described above, the above embodiment is intended to facilitate understanding of the present invention and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  For example, in the present embodiment, the printer 10 includes two heaters, the preheater 51 and the print heater 52. However, the present invention is not limited to this, and only the preheater 51 or the print heater 52 is disposed. There may be.

  Three or more heaters may be provided. In this case, all the heaters may be controlled to operate in the boost control mode 72 similarly to the pre-heater 51 described above, or only some heaters may be operated in the boost control mode 72. Good.

  In the present embodiment, the preheater 51 and the print heater 52 are controlled to be turned on or off. However, the present invention is not limited to this. The operation may be controlled by adjusting the amount of power supplied to 51 and the print heater 52. Further, the temperature control method by the temperature controller 60 is not limited to ON / OFF control, and a known method such as phase control or cycle control may be employed.

  In this embodiment, the timeout time is stored in advance in the storage unit 602. However, the setting unit 601 may receive an input of the timeout time and write it in the storage unit 602.

  Moreover, in this embodiment, although it assumed that the roll 31 was wound around the core part 32, you may make it abbreviate | omit not only this but the core part 32. FIG. In this case, the medium sensor 55 may detect whether or not the entire roll 31 is present, not the attachment / detachment of the core portion 32, and whether the recording medium 30 is disposed on at least a part of the platen 40. It may be determined whether or not the roll 31 is attached / detached.

DESCRIPTION OF SYMBOLS 10 Printer 11 Leg part 12 Base part 13 End part 14 End part 15 Wall 16 Guide rail 17 Wire 21 Carriage 22 Ink head 30 Recording medium 31 Roll 32 Core part 40 Platen 41 Drive roller 42 Pinch roller 51 Preheater 52 Print heater 53 Temperature sensor 54 Temperature sensor 55 Medium sensor 60 Temperature controller 61 Electric power controller 601 Setting unit 602 Storage unit 603 Control unit

Claims (5)

A printing unit that ejects ink to print on a recording medium;
A heater for heating the recording medium;
A control unit for controlling the operation of the heater according to a set temperature;
A medium sensor for detecting that the recording medium has been removed;
A setting section for raising the set temperature when the recording medium is removed;
An ink jet printer comprising: The inkjet printer according to claim 1,
The setting unit changes a degree of raising the set temperature according to a thickness of the recording medium;
Inkjet printer characterized by. The inkjet printer according to claim 1,
It has a temperature sensor that measures the outside temperature,
The setting unit changes a degree of raising the set temperature according to the outside air temperature,
Inkjet printer characterized by. The inkjet printer according to claim 1,
It has a temperature sensor that measures the outside temperature,
The heater can change the output,
The controller controls the heater to change the output according to the outside air temperature;
Inkjet printer characterized by. The inkjet printer according to claim 1,
It has a time zone storage unit that stores time zones with low printing frequency,
The setting unit lowers the set temperature when the current time is included in the time zone,
Inkjet printer characterized by.

Images