JP2011051118A - Inkjet printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to take out paper accumulated in a conveyance path in a comparatively short time by promptly cooling the conveyance path. <P>SOLUTION: The inkjet printer includes: a first drying furnace 81 which is a furnace arranged to surround a part of the conveyance path and heats the inside of the furnace; a second drying furnace 82 which is arranged to surround a part of the conveyance path; a cooling fan 87 which cools the inside of the first drying furnace 81; temperature sensors 91 to 93 which detect inside temperature of each of the first drying furnace 81 and the second drying furnace 82; a first lock part 95 and a second lock part 97 which set the first drying furnace 81 and the second drying furnace 82 to either a locked state or an unlocked state; a cooling controller 80a which allows the cooling fun 87 to perform cooling when paper jamming is detected; and a lock controller 80b which allows the first lock part or the second lock part corresponding to the first drying furnace or the second drying furnace whose inside temperature becomes equal to or lower than threshold temperature to unlock the lock part when inside temperature detected by the temperature sensors 91 to 93 becomes equal to or lower than predetermined threashold temperature. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an inkjet printing apparatus that performs printing on a print medium by ejecting ink with an inkjet head.

  In recent years, water-based inks are often used in ink jet printing apparatuses that perform printing on printing paper by discharging ink using an ink jet head. The water-based ink referred to here is an ink containing water, and is a concept including an O / W (Oil in Water) type and a W / O (Water in Oil) type emulsion ink.

  By the way, in the ink jet printing apparatus using such water-based ink, when the water content in the water-based ink increases, water enters between hydrogen bonds of cellulose contained in the paper, and the distance between the fibers of the paper increases. Therefore, the surface of the paper is deformed so as to wave.

  When the paper is deformed in this manner, the deformed paper may come into contact with the inkjet head when the paper is transported. When the deformed paper comes into contact with the ink jet head, paper jam may occur, the print paper may be soiled, and the nozzle plate may be damaged.

  Therefore, in order to suppress the deformation of the paper, it is conceivable to heat and dry the paper being transported through the transport path.

  When heating printed paper in this way, paper jams are mostly suppressed to prevent paper deformation, but there is a small amount of paper jams that occur when paper transport stops. In this case, it is necessary to cool the conveyance path so that the paper staying in the conveyance path can be taken out as preparation for resuming printing.

  Patent Document 1 includes a door switch that detects opening and closing of a door of a housing in which a fixing heater is accommodated, and a thermostat. When the door switch is opened or when an internal switch of the thermostat is opened, There has been proposed a power control device that stops power supply of a power supply circuit. When the door switch is opened or when the thermostat internal switch is opened, the power supply of the power supply circuit is stopped to cool the conveyance path and remove the sheet.

JP 2008-70639 A

  However, in the power control device described in Patent Document 1, when the door switch is opened, or when the internal switch of the thermostat is opened, the power supply of the power supply circuit is stopped. A considerable amount of time was required until the temperature decreased, and it was not until after that time that the paper staying in the conveyance path could be taken out, so it took time to take out the paper.

  For this reason, even if the technique described in Patent Document 1 is applied to an ink jet printing apparatus, it takes a considerable amount of time until the temperature of the conveyance path is lowered, and the paper staying in the conveyance path is relatively short for the user. Could not be removed in time.

  The present invention has been made in view of the above problems, and provides an inkjet printing apparatus that quickly cools a conveyance path and allows a user to take out a sheet staying in the conveyance path in a relatively short time. With the goal.

  In order to achieve the above object, a first feature of an ink jet printing apparatus according to the present invention is an ink jet printing apparatus that performs printing by discharging ink with an ink jet head, and a conveyance path through which a printed printing medium is conveyed A first drying furnace that heats the inside of the furnace, and at least one of a front-rear direction along a conveying direction with respect to the first drying furnace. On the other hand, a furnace disposed so as to surround at least a part of the transport path, wherein a second drying furnace in which a temperature atmosphere from the first drying furnace is conducted, and the first drying furnace Cooling means for cooling the inside of the furnace, temperature detection means for detecting the furnace temperatures of the first drying furnace and the second drying furnace, the first drying furnace and the second drying furnace, Front with each enclosing transport path A first lock portion and a second lock portion, which are configured to be able to be taken in and out in a direction in which the print medium on the conveyance path can be pulled out, and set to either a locked state in which it cannot be taken in or out or an unlocked state in which it can be taken in and out; A paper jam detecting means for detecting a paper jam of the print medium on the road, and a cooling control means for causing the cooling means to cool the inside of the first drying furnace when the paper jam is detected by the paper jam detecting means. And when the furnace temperature detected by the temperature detection unit is equal to or lower than a predetermined threshold temperature after cooling is started by the cooling unit, among the first lock unit and the second lock unit, And a lock control unit for unlocking the lock unit corresponding to the first drying furnace or the second drying furnace whose furnace temperature is equal to or lower than a predetermined threshold temperature.

  In order to achieve the above object, a second feature of the ink jet printing apparatus according to the present invention is further provided with a second cooling means for cooling the inside of the second drying furnace, wherein the cooling control means includes the When a paper jam is detected by the paper jam detection unit, the cooling unit cools the inside of the first drying furnace, and the second cooling unit cools the inside of the second drying furnace. There is.

  In order to achieve the above object, a third feature of the ink jet printing apparatus according to the present invention is that, when a paper jam is detected by the paper jam detection means, the first lock portion and It is further provided with a display control means for displaying information indicating that the lock part corresponding to the two lock parts is unlocked on the display part.

  In order to achieve the above object, a fourth feature of the ink jet printing apparatus according to the present invention is an ink jet printing apparatus that performs printing by discharging ink with an ink jet head, and a conveyance path through which a printed print medium is conveyed A furnace disposed so as to surround at least a part thereof, a drying furnace for heating the inside of the furnace, a cooling means for cooling the inside of the drying furnace, and an in-furnace temperature of the drying furnace are detected The temperature detection means and the drying furnace are configured so that the print medium on the conveyance path can be drawn out together with the enclosed conveyance path, and either the locked state that makes the loading or unloading or the unlocked state that makes the loading or unloading possible. A lock portion to be set, a paper jam detecting means for detecting a paper jam of the print medium on the conveyance path, and a paper jam detected by the paper jam detecting means. A cooling control means for causing the cooling means to cool the inside of the drying furnace, and after the cooling means starts cooling, the temperature inside the furnace detected by the temperature detection unit becomes a predetermined threshold temperature or less. In some cases, a lock control unit for unlocking the lock unit is provided.

  According to the ink jet printing apparatus of the present invention, the transport path can be quickly cooled, and the user can take out the paper staying in the transport path in a relatively short time.

It is a block diagram which shows the structure of the inkjet printing apparatus which is Example 1 of this invention. 1 is a diagram illustrating a configuration around a paper jam detection sensor included in an inkjet printing apparatus that is Embodiment 1 of the present invention. FIG. 1 is a plan view of an ink jet printing apparatus that is Embodiment 1 of the present invention. It is a functional block diagram which shows the function structure of the inkjet printing apparatus which is Example 1 of this invention. It is the flowchart which showed the processing flow of the inkjet printing apparatus which is Example 1 of this invention. It is the figure which showed an example of the stay printing paper removal procedure displayed on the display part with which the inkjet printing apparatus which is Example 1 of this invention is provided. It is the flowchart which showed the processing flow of the inkjet printing apparatus which is Example 2 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Configuration of inkjet printing apparatus>
The configuration of the inkjet printing apparatus that is Embodiment 1 of the present invention will be described in detail.

  FIG. 1 is a configuration diagram illustrating the configuration of an inkjet printing apparatus that is Embodiment 1 of the present invention.

  As shown in FIG. 1, the inkjet printing apparatus 1 includes a side paper feed unit 10, an internal paper feed unit 20, a printing unit 30, a paper discharge unit 40, and a reversing unit 50.

  The side paper feeding unit 10 includes a paper feeding table 11 on which the printing paper W is stacked, and a primary paper feeding unit 12 that conveys only the uppermost printing paper W from the paper feeding table 11 onto the paper feeding conveyance path FR. And a secondary paper feeding unit 14 for carrying the printing paper W conveyed by the primary paper feeding unit 12 onto the circulation conveyance path CR.

  The internal paper feeder 20 includes a paper feeder 21a on which the printing paper W is stacked, and a primary paper feeder 22a that transports only the uppermost printing paper W from the paper feeder 21a onto the paper feed conveyance path FR. The printing paper W is laminated, the primary paper supply unit 22b that conveys only the uppermost printing paper W from the paper feeding base 21b onto the paper feeding conveyance path FR, and the printing paper W. Sheet feeding table 21c, a primary sheet feeding unit 22c that conveys only the uppermost printing sheet W from the sheet feeding table 21c onto the sheet feeding conveyance path FR, and a sheet feeding table 21d on which the printing sheets W are stacked. And a primary paper feed section 22d for transporting only the uppermost printing paper W from the paper feed tray 21d onto the paper feed transport path FR.

  In this way, the printing paper W is conveyed from the side paper feeding unit 10 and the internal paper feeding unit 20 to the secondary paper feeding unit 14, and further, the printing paper W is also conveyed from the reversing unit 50 described later.

  Therefore, a junction point where the transport path of the fed printing paper W and the path through which the back-side printing paper is circulated is joined is present in front of the secondary paper feed unit 14 in the transport direction. . Based on this merging point, the path on the paper feed mechanism side is referred to as a paper feed conveyance path FR, and the other path is referred to as a circulation conveyance path CR.

  The printing unit 30 includes a head unit 31 in which a plurality of print heads are incorporated, and an annular conveyance belt 32 provided on the opposing surface of the head unit 31, and is fed by the secondary paper feeding unit 14. The printing paper W is adsorbed on the conveyance belt 32 by a suction unit (not shown) installed in the annular conveyance belt 32, and is conveyed in units of lines by ink ejected from the head unit 31 while being conveyed at a speed determined by printing conditions. Is printed on the printing paper W.

  In addition, the printing unit 30 includes a paper jam detection sensor 34.

  FIG. 2 is a diagram illustrating a configuration around the paper jam detection sensor 34.

  As illustrated in FIG. 2, the paper jam detection sensor 34 includes a transport belt 32 between the SS roller 33 and the head unit 31 that presses the central portion of the printing paper W transported on the circulation transport path CR against the transport belt 32. Deformation is detected by contacting with a deformed portion of the printing paper W that is spaced apart from the upper surface by a predetermined distance B and exceeds the separation distance B.

  Specifically, the paper jam detection sensor 34 is pivotally supported so as to be capable of swinging in the transport direction, and the swinging portion 34a on the cross-sectional crank and the swing detecting the swing of the paper jam detection sensor 34. And a sensor unit 34b.

  The lower end of the oscillating portion 34a is separated from the upper surface of the conveyor belt 32 by a predetermined distance B as described above, and is separated from the SS roller 33 by a distance A in the conveyance direction. If the deformed printing paper W floats after passing through the SS roller 33, when the leading edge of the paper comes into contact with the swinging portion 34a and is pushed in the R direction to swing, the other of the swinging portion 34a The end part is detached from the swing sensor part 34b. Thereby, it can be detected that the deformation of the printing paper W exceeds a predetermined amount, and it is determined that a paper jam has occurred.

  Returning to FIG. 1, the printing paper W printed by the printing unit 30 is conveyed on the circulation conveyance path CR in the housing by a conveyance roller or the like disposed on the circulation conveyance path CR. A switching mechanism 43 is provided on the circulation conveyance path CR to switch between guiding the printing paper W conveyed on the circulation conveyance path CR to the paper discharge unit 40 or recirculating it on the circulation conveyance path CR. Yes.

  The switching mechanism 43 switches the printing paper W in order to guide it to one of a paper discharge unit 40 and a reversing unit 50 described later.

  The paper discharge unit 40 includes a tray-shaped paper discharge table 41 protruding from the casing of the inkjet printing apparatus 1 and a pair of paper discharge rollers 42 that guide the print paper W to the paper discharge table 41. Then, the printing paper W guided to the paper discharge unit 40 by the switching mechanism 43 is conveyed to the paper discharge table 41 by the paper discharge roller 42, and is stacked on the paper discharge table 41 with the printing surface facing down.

  The reversing unit 50 reverses the printing paper W, and the reversing unit 51 conveys the printing paper W from the circulation conveyance path CR to the reversing table 51 or conveys the printing paper W from the reversing table 51 onto the circulation conveyance path CR. A roller 52 and printing paper detection sensors 54 and 55 are provided.

  The printing paper W guided to the reversing unit 50 by the switching mechanism 43 is transported from the circulation transport path CR to the reversing table 51 by the reversing roller 52, and is transported from the reversing table 51 to the circulation transport path CR after a predetermined time. Thus, the front and back are reversed with respect to the circulation conveyance path CR. The printing paper W whose front and back are reversed is conveyed on the circulation conveyance path CR by a plurality of rollers such as a conveyance roller 53 provided on the circulation conveyance path CR.

  The printing paper detection sensors 54 and 55 are light transmission type or reflection type sensors, and detect the leading edge and the trailing edge of the printing paper W conveyed from the circulation conveyance path CR to the reversing unit 50. Thereby, after the printing paper W is detected by the printing paper detection sensor 54, when the printing paper W is not detected by the printing paper detection sensor 55 even after a predetermined time has passed, it is determined that a paper jam has occurred.

  The first drying furnace 81, the second drying furnace 82, and the third drying furnace 83 are provided so as to surround the circulation conveyance path CR in order to remove moisture from the printing paper W being conveyed through the circulation conveyance path CR. It has been. The first to third drying furnaces 81 to 83 are each divided as one furnace, and each of the first to third drying furnaces 81 to 83 is disposed in front of the paper surface shown in FIG. It has a structure that can be pulled out to the side.

  FIG. 3 is a top view of the ink jet printing apparatus 1 that is Embodiment 1 of the present invention.

  As shown in FIG. 3, when the front doors 61 and 62 of the casing of the inkjet printing apparatus 1 are opened by the user in the D direction and the E direction, respectively, the second drying furnace 82 becomes the second drying furnace 82. Along with the circulation conveyance path CR surrounded by, the structure can be pulled out in the F direction. Similarly, the first drying furnace 81 and the third drying furnace 83 have a structure that can be pulled out in the F direction together with the circulation conveyance path CR surrounded by the first drying furnace 81 and the third drying furnace 83, respectively. .

  Moreover, although not shown in figure, the 1st-3rd drying furnaces 81-83 are set to either the locked state locked so that it cannot be pulled out in the F direction, respectively, or the unlocked state unlocked so that each can be pulled out in the F direction. It has a lock. The lock may be a motor-driven type that is locked or unlocked by a motor drive, or may be a solenoid-driven type that is locked or unlocked when a solenoid (electromagnet) is energized to operate.

  Further, as shown in FIG. 1, a heater 85 is provided in the first drying furnace 81, and when the heater 85 generates heat, the inside of the first drying furnace 81 is heated, and the first drying furnace 81 is heated on the circulation conveyance path CR. 1 The printing paper W conveyed in the drying furnace 81 is dried.

  The first drying furnace 81 has a circulation fan 86 that circulates the atmosphere in the first drying furnace 81 and the outside air of the inkjet printing apparatus 1 introduced into the first drying furnace 81 so that the inside of the first drying furnace 81 is filled. A cooling fan 87 for cooling is mounted.

  The second drying furnace 82 and the third drying furnace 83 are provided adjacent to the first drying furnace 81 before and after the first drying furnace 81 on the circulation conveyance path CR, and are heated. The inside of the furnace is heated by transferring the heat of 81.

  Further, the first to third drying furnaces 81 to 83 are provided with temperature sensors 91, 92, 93, respectively, and the in-furnace temperatures of the first to third drying furnaces 81 to 83 are measured.

<Functional configuration of printing device>
FIG. 4 is a functional configuration diagram illustrating a functional configuration of the inkjet printing apparatus 1 that is Embodiment 1 of the present invention.

  As shown in FIG. 4, the inkjet printing apparatus 1 includes a RAM 71, a ROM 72, a display unit 73, a control unit 80, temperature sensors 91 to 93, a paper jam sensor 34, printing paper detection sensors 54 and 55, Locks 95 to 97, a front door lock 98, and a cooling fan 87 are provided.

  Among these configurations, the temperature sensors 91 to 93, the paper jam sensor 34, the print paper detection sensors 54 and 55, and the cooling fan 87 have been described above, and thus description thereof is omitted.

  The RAM 71 is composed of a volatile semiconductor or the like, and stores data and the like necessary for the control unit 80 to execute various processes.

  The ROM 72 is composed of a nonvolatile semiconductor or the like and stores various control programs executed by the control unit 80.

  The display unit 73 includes an image output unit such as an organic EL (electroluminescence) display or a liquid crystal display, and information necessary for executing a printing process according to an instruction from the display control unit 80c of the control unit 80 described later, for example, Then, a staying printing paper removal procedure for removing the printing paper W staying in the paper feeding conveyance path FR and the circulation conveyance path CR is displayed.

  The lock 95 is locked so that the first drying furnace 81 is not pulled out by the user, or unlocked so that the first drying furnace 81 is pulled out by the user. Similarly, the locks 96 and 97 are locked so that the second to third drying furnaces 82 to 83 are not pulled out by the user, or the second to third drying furnaces 82 to 83 are forwarded by the user. Unlock each one as it is pulled out.

  The front door lock 98 is locked so that the front doors 61 and 62 of the casing of the inkjet printing apparatus 1 are not opened while the inkjet printing apparatus 1 is executing the printing process, and when the inkjet printing apparatus 1 stops the printing process. Then, the front doors 61 and 62 of the casing of the inkjet printing apparatus 1 are unlocked so as to open.

  The control unit 80 performs central control of the inkjet printing apparatus 1. Moreover, the control part 80 is provided with the cooling control part 80a, the lock | rock control part 80b, and the display control part 80c on the function.

  When a paper jam is detected, the cooling control unit 80a causes the cooling fan 87 to cool the inside of the first drying furnace 81.

  After the cooling is started by the cooling fan 87, the lock control unit 80b detects the locks 95 to 97 when the respective in-furnace temperatures detected by the temperature sensors 91, 92, 93 are equal to or lower than a predetermined threshold temperature. Among them, the locks corresponding to the first to third drying furnaces 81 to 83 whose furnace temperatures detected by the temperature sensors 91, 92, and 93 are equal to or lower than a predetermined threshold temperature are unlocked.

  When a paper jam is detected, the display control unit 80c causes the display unit 73 to display a stay printing paper removal procedure for removing the paper jam.

<Operation of Inkjet Printing Apparatus 1>
Next, the operation of the inkjet printing apparatus 1 that is Embodiment 1 of the present invention will be described.

  FIG. 5 is a flowchart showing a process flow of the inkjet printing apparatus 1 according to the first embodiment of the present invention.

  As shown in FIG. 5, the control unit 80 determines whether a paper jam has occurred (step S101). Specifically, when the paper jam detection sensor 34 detects deformation of the print paper W, or after the print paper W is detected by the print paper detection sensor 54, the print paper detection sensor 55 performs printing even after a predetermined time has elapsed. When the paper W is not detected, or when a plurality of sensors (not shown) installed in the circulation conveyance path cannot detect the presence of the paper within the time determined by the set print schedule, The control unit 80 determines that a paper jam has occurred.

  If it is determined in step S101 that a paper jam has occurred (in the case of YES), the control unit 80 stops the conveyance of the printing paper W in the paper feed conveyance path FR and the circulation conveyance path CR (step S103).

  Next, the lock control unit 80b of the control unit 80 unlocks the front door lock 98 so that the front doors 61 and 62 of the housing of the inkjet printing apparatus 1 are opened (step S105).

  Then, the control unit 80 causes the display unit 73 to display a stagnant printing paper removal procedure for removing the printing paper W that has stagnated in the paper feed conveyance path FR and the circulation conveyance path CR (step S107).

  FIG. 6 is a diagram showing an example of the stay printing paper removal procedure displayed on the display unit 73.

  As shown in FIG. 6, the stagnant printing paper removal procedure is displayed so as to remove the printing paper in order from the low temperature part.

  Specifically, since the distance from the heater 85 is the longest in the paper feed conveyance path FR and the circulation conveyance path CR, the print paper W that has accumulated first is removed from the belt platen (conveyance unit 32) that is the lowest temperature (procedure 1). Next, the printing paper W staying in the second drying furnace 82 and the third drying furnace 83 cooled by opening the front door is removed (procedure 2), and finally, the heater 85 is provided inside. Then, the staying printing paper removing procedure is displayed so that the printing paper W staying in the first drying furnace 81 having the highest temperature is removed (step 3).

  Next, the cooling control unit 80a of the control unit 80 activates the cooling fan 87 (step S109). As described above, when the cooling fan 87 is activated, the inside of the first drying furnace 81 is cooled, and further, the second drying furnace 82 and the third drying furnace 83 are caused by heat radiation by opening the front doors 61 and 62. To be cooled.

  Then, the control unit 80 determines whether all the printing paper W staying in the transport unit 32 has been removed based on the detection result of each sensor such as the paper jam detection sensor 34 (step S111).

  When it is determined in step S111 that all the printing paper W staying in the transport unit 32 has been removed (in the case of YES), the control unit 80 determines that the in-furnace temperature of the second drying furnace 82 measured by the temperature sensor 92 is It is determined whether or not the temperature is equal to or lower than a predetermined threshold temperature (step S113). Here, the threshold temperature is set as an appropriate value in advance within a range of 35 (° C.) to 45 (° C.), for example.

  In step S113, when it is determined that the in-furnace temperature of the second drying furnace 82 is equal to or lower than the predetermined threshold temperature (in the case of YES), the lock control unit 80b of the control unit 80 is used by the user. So that the second drying furnace 82 can be pulled out (step S117).

  Next, the control unit 80 determines whether or not the temperature in the third drying furnace 83 measured by the temperature sensor 93 is equal to or lower than a predetermined threshold temperature (step S119).

  In step S119, when it is determined that the furnace temperature of the third drying furnace 83 is equal to or lower than the predetermined threshold temperature (in the case of YES), the lock control unit 80b of the control unit 80 is used by the user. Is unlocked (step S123). The lock 97 of the third drying furnace 83 is unlocked.

  Next, the control unit 80 determines whether or not the second drying furnace 82 and the third drying furnace 83 are unlocked (step S125).

  In step S125, when it is determined that the second drying furnace 82 and the third drying furnace 83 are unlocked (in the case of YES), the control unit 80 detects the inside of the first drying furnace 81 measured by the temperature sensor 91. It is determined whether or not the temperature is equal to or lower than a predetermined threshold temperature (step S127).

  In step S127, when it is determined that the furnace temperature of the first drying furnace 81 is equal to or lower than the predetermined threshold temperature (in the case of YES), the lock control unit 80b of the control unit 80 allows the user to use the first drying furnace 81. Is unlocked so that the first drying furnace 81 can be pulled out (step S131).

  As described above, according to the inkjet printing apparatus 1 that is Embodiment 1 of the present invention, when a paper jam occurs, the first to third drying furnaces 81 to 83 are cooled, so that the conveyance path can be moved relatively quickly. Can be cooled. Moreover, since the locks 95 to 97 of the first to third drying furnaces 81 to 83 having different furnace temperatures are unlocked in stages, the user unlocks the first to third drying furnaces 81 to 83. The remaining printing paper W can be removed in order from the drying oven. As a result, the user can remove all of the printing paper W staying in the ink jet printing apparatus 1 in a relatively short time compared to the prior art.

  In addition, although it was set as the structure provided with the 1st-3rd drying furnaces 81-83 in the inkjet printing apparatus 1 which is Example 1 of this invention, it is not restricted to this, The 1st drying furnace 81 and the 2nd drying furnace 82 And it is good also as a structure provided with either one among the 3rd drying furnaces 83. FIG.

  Moreover, in the inkjet printing apparatus 1 which is Example 1 of this invention, the heater 85 was provided in the 1st drying furnace 81, and when the heater 85 generated heat, the inside of the 1st drying furnace 81 was heated and heated. Although the inside of the 2nd drying furnace 82 and the inside of the 3rd drying furnace 83 was heated by transferring the heat of the 1st drying furnace 81, it is not restricted to this. For example, a heater may be provided in each of the second drying furnace 82 and the third drying furnace 83, and each furnace may be heated at a temperature lower than the temperature in the first drying furnace 81. Further, the heating means is not limited to the heater, and the inside of the furnace may be heated by a circulating fan flowing warm air into the furnace.

  Moreover, in the inkjet printing apparatus 1 which is Example 1 of this invention, although it was set as the structure provided with the cooling fan 87 as a cooling means, it should just be an apparatus which cools the inside of a furnace like a heat exchanger, for example. .

  In the first embodiment of the present invention, the inkjet printing apparatus 1 including the cooling fan that cools the inside of the first drying furnace 81 has been described as an example.

  In the second embodiment of the present invention, an example of the inkjet printing apparatus 1 provided with a cooling fan that is provided corresponding to each of the first to third drying furnaces 81 to 83 and cools each of the first to third drying furnaces 81 to 83 is taken as an example. Will be described.

  The configuration of the inkjet printing apparatus 1 that is Embodiment 2 of the present invention is the same as that of the inkjet printing apparatus 1 that is Embodiment 1 of the present invention shown in FIG. A fan 88 and a third cooling fan 89 that cools the third drying furnace 83 are provided.

  FIG. 7 is a flowchart showing a processing flow of the ink jet printing apparatus 1 which is Embodiment 2 of the present invention. Among the processes shown in the flowchart of FIG. 7, the processes with the same step name shown in the flowchart of FIG. Specifically, the processing of steps S207, S209, S215 to S218, S221 to S224, and S229 to S233 will be described below.

  As shown in FIG. 7, when the front door lock 98 is unlocked in step S105, all of the first to third cooling fans 87, 88, 89 are activated (step S209).

  In Step S113, when it is determined that the furnace temperature of the second drying furnace 82 is equal to or lower than a predetermined threshold temperature (in the case of YES), the cooling control unit 80a of the control unit 80 turns the second cooling fan 88 on. Stop (step S215).

  Then, the lock control unit 80b of the control unit 80 unlocks the lock 96 of the second drying furnace 82 so that the user can pull the second drying furnace 82 forward (step S217).

  Next, the display control unit 80c of the control unit 80 causes the display unit 73 to display a staying print sheet removal message (step S218). For example, the display control unit 80c displays a message such as “Pull out the second drying furnace and remove the internal printing paper”.

  In Step S119, when it is determined that the furnace temperature of the third drying furnace 83 is equal to or lower than the predetermined threshold temperature (in the case of YES), the cooling control unit 80a of the control unit 80 turns the third cooling fan 89 on. Stop (step S221).

  Then, the lock control unit 80b of the control unit 80 unlocks the lock 97 of the third drying furnace 83 so that the user can pull out the third drying furnace 83 to the front (step S223).

  Next, the display control unit 80c of the control unit 80 causes the display unit 73 to display a stay printing paper removal message (step S224). For example, the display control unit 80c displays a message such as “Pull out the third drying furnace and remove the internal printing paper”.

  In Step S127, when it is determined that the furnace temperature of the first drying furnace 81 is equal to or lower than the predetermined threshold temperature (in the case of YES), the cooling control unit 80a of the control unit 80 causes the first cooling fan 87 to be turned on. Stop (step S229).

  Then, the lock control unit 80b of the control unit 80 unlocks the lock 95 of the first drying furnace 81 so that the user can pull out the first drying furnace 81 to the front (step S231).

  Next, the display control unit 80c of the control unit 80 causes the display unit 73 to display a staying print sheet removal message (step S233). For example, the display control unit 80c displays a message such as “Pull out the first drying furnace and remove the internal printing paper”.

  As described above, according to the inkjet printing apparatus 1 that is Embodiment 2 of the present invention, the first to third cooling fans 87 to 89 for cooling the first to third drying furnaces 81 to 83 are provided. In addition to the effects of the inkjet printing apparatus 1 according to the first embodiment of the present invention, the first to third drying furnaces 81 and 83 can be cooled earlier, and the user can remove the remaining printing paper W more. It can be removed in a short time.

  Moreover, according to the inkjet printing apparatus 1 which is Example 2 of this invention, since a stagnant printing paper removal message is displayed according to the furnace temperature of the 1st-3rd drying furnace 81-83, a user is It is possible to easily grasp which drying oven should be pulled out in order and the retained printing paper should be removed.

  In the first and second embodiments, the water-based ink has been described. However, although the effect is lower than that of the water-based ink, the present invention can also be applied to oil-based ink.

  Moreover, although Example 1 and 2 of this invention demonstrated the inkjet printing apparatus 1 provided with the 1st-3rd drying furnaces 81-83, not only this but only the 1st drying furnace 81 is provided as a drying furnace. It is good also as a structure.

  Specifically, a furnace disposed so as to surround at least a part of a conveyance path through which the printed printing paper W is conveyed, a drying furnace 81 that heats the inside of the furnace, and a furnace in the drying furnace 81 The cooling fan 87 for cooling the air, the temperature sensor 91 for detecting the temperature in the furnace of the drying furnace 81, and the drying furnace are configured so that the printing paper W on the conveyance path can be drawn out along with the surrounding conveyance path. A lock portion 95 that is set to either a locked state that disables loading / unloading or an unlocked state that allows loading / unloading, a paper jam detection sensor 34 that detects a paper jam of the printing paper W on the conveyance path, and a paper jam detection sensor 34. Is detected by the temperature sensor 91 after the cooling fan 87 starts cooling, and the cooling fan 80 cools the inside of the drying furnace. If the temperature is equal to or less than a predetermined threshold temperature, it may be provided with a lock control unit 80b for unlocking the lock portion 95.

DESCRIPTION OF SYMBOLS 1 ... Inkjet printer 10 ... Side paper feeding part 20 ... Internal paper feeding part 30 ... Printing part 34 ... Paper jam detection sensor 40 ... Paper discharge part 50 ... Reversing part 51 ... Reversing stand 54, 55 ... Printing paper detection sensor 71 ... RAM
72 ... ROM
73 ... Display unit 80 ... Control unit 80a ... Cooling control unit 80b ... Lock control unit 80c ... Display control unit 81 ... First drying furnace 82 ... Second drying furnace (second drying furnace)
83. Third drying furnace (second drying furnace)
85 ... Heater 86 ... Circulating fan 87 ... Cooling fan (first cooling fan)
88 ... 2nd cooling fan 89 ... 3rd cooling fan 91-93 ... temperature sensor 95 ... lock (1st lock part)
96, 97 ... lock (second lock part)
98 ... Front door lock

Claims (3)

An inkjet printing apparatus that performs printing by discharging ink with an inkjet head,
A furnace disposed so as to surround at least a part of a conveyance path through which a printed print medium is conveyed, and a first drying furnace for heating the inside of the furnace;
A furnace disposed in at least one of the front and rear directions along the transport direction with respect to the first drying furnace so as to surround at least a part of the transport path, from the first drying furnace A second drying oven in which a temperature atmosphere is conducted;
Cooling means for cooling the inside of the first drying furnace;
Temperature detecting means for detecting the temperature in each of the first drying furnace and the second drying furnace;
The first drying furnace and the second drying furnace are configured so that the print medium on the transport path can be pulled out and put out together with the surrounding transport path, and can be locked out or put out. A first lock portion and a second lock portion that are set to any of the unlocked states to be
A paper jam detecting means for detecting a paper jam of the print medium on the transport path;
A cooling control means for causing the cooling means to cool the inside of the first drying furnace when a paper jam is detected by the paper jam detecting means;
After the start of cooling by the cooling means, when the furnace temperature detected by the temperature detection unit is equal to or lower than a predetermined threshold temperature, of the first lock part and the second lock part, A lock control unit for unlocking the lock unit corresponding to the first drying furnace or the second drying furnace whose temperature is equal to or lower than a predetermined threshold temperature;
An ink jet printing apparatus comprising: A second cooling means for cooling the inside of the second drying furnace;
The cooling control means includes
When a paper jam is detected by the paper jam detection means, the cooling means cools the inside of the first drying furnace and the second cooling means cools the inside of the second drying furnace. The inkjet printing apparatus according to claim 1, wherein: When a paper jam is detected by the paper jam detection means, information indicating that the lock portions corresponding to the first lock portion and the second lock portion are unlocked according to the order in which the temperature in the furnace is low is displayed. Display control means to be displayed on the screen,
The inkjet printing apparatus according to claim 1, further comprising:

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