JP6932331B2 - Drying equipment, printing equipment - Google Patents

Description

The present invention relates to a drying device and a printing device.

As a printing device that applies a liquid to a continuous paper or the like to perform printing, there is a printing device that applies the liquid to the continuous paper or the like and then dries it using a heating means.

Conventionally, there is a device that detects the surface temperature of an infrared heater and shuts off the energization of the infrared heater at the time of abnormal heating (Patent Document 1). A contact temperature sensor that measures the temperature of the platen is placed on the opposite side of the platen recording medium directly below the infrared heater, and the temperature of the recording medium is directly measured assuming that the temperature of this contact temperature sensor is the original temperature of the recording medium. Some change the set value of the temperature sensor to be measured (Patent Document 2). Further, there is one that controls the irradiation energy of the infrared heater by detecting the irradiation energy with the infrared sensor within the heating range of the infrared heater (Patent Document 3).

Japanese Unexamined Patent Publication No. 5-8372 Japanese Unexamined Patent Publication No. 2015-178261 Japanese Patent Application Laid-Open No. 2014-136315

By the way, for example, if the medium to be the conveyed member to be conveyed is stopped but the heating means is kept on, the medium may be excessively heated and the medium may be discolored. Therefore, it is conceivable to perform on / off control in which the heating means is turned on when the medium is being conveyed and the heating means is turned off when the medium is stopped.

However, with this on / off control alone, even though the medium is stopped due to a transfer abnormality or the like, when a transfer error detection that detects that the medium is being conveyed occurs, the on state of the heating means is continued. Therefore, the problem that the medium is overheated remains.

Here, it is conceivable to directly detect the temperature of the medium and turn off the heating means before the medium causes discoloration.

However, since the characteristic value differs depending on the medium, there is a problem that the standard for discriminating the abnormal temperature becomes complicated when the temperature of the medium is directly detected.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent abnormal heating due to erroneous transfer detection by simple control.

In order to solve the above problems, the drying apparatus according to claim 1 of the present invention is
A drying device that dries a member to be transported to which a liquid is applied.
A heating means for heating the conveyed member and
A support member that faces the heating means and supports the conveyed member,
A means for controlling the heating means to be turned on while the transported member is being transported and the heating means to be turned off when the transportation of the transported member is stopped.
A temperature detecting means for detecting the temperature of the support member is provided.
The means for performing the control is the heating means when the temperature detected by the temperature detecting means becomes equal to or higher than a predetermined temperature when the transporting of the transported member is not stopped after the transport of the transported member is started. Was configured to be turned off.

According to the present invention, abnormal heating due to erroneous transfer detection can be prevented by simple control.

It is the schematic explanatory drawing of the printing apparatus which concerns on 1st Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus in the 1st Embodiment. It is explanatory drawing provided for the explanation of the winding angle around a heating roller and a heating drum. It is a side view seen from the roller axial direction around one infrared heater which is used for the explanation of the 1st example of temperature detection. Similarly, it is explanatory drawing in the longitudinal direction of a roller. It is a side view seen from the roller axial direction around one infrared heater which is used for the explanation of the 2nd example of temperature detection. Similarly, it is explanatory drawing in the longitudinal direction of a roller. It is a block explanatory drawing which provides the outline | description of the drying control part. It is a flow figure which provides the explanation of the control of the heating means by a drying control part. It is explanatory drawing of the power supply path part to the heating means in the drying apparatus which concerns on 2nd Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus in 3rd Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus in 4th Embodiment of this invention. It is the schematic explanatory drawing of the printing apparatus which concerns on 5th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, the printing apparatus according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic explanatory view of the device.

This printing device is an inkjet recording device, and is a liquid applying means for ejecting and applying ink, which is a liquid of a required color, to continuous book paper 110, which is a member to be conveyed (hereinafter referred to as “medium”). It has a liquid applying unit 101 including a discharge head.

In the liquid application unit 101, for example, full-line heads 111A, 111B, 111C, 111D for four colors are arranged from the upstream side in the transport direction of the continuous paper 110. Each head 111 applies a liquid of black K, cyan C, magenta M, and yellow Y to the continuous paper 110. The types and numbers of colors are not limited to this.

The continuous paper 110 is fed out from the original winding roller 102, sent out by the transport roller 112 of the transport unit 103 onto the transport guide member 113 arranged to face the liquid applying portion 101, and guided by the transport guide member 113. Is transported (moved).

The continuous paper 110 to which the liquid is applied by the liquid application unit 101 is sent by the discharge roller 114 via the drying device 104 as the drying device according to the present invention, and is wound by the take-up roller 105.

Next, the drying apparatus according to the first embodiment will be described with reference to FIG. FIG. 2 is an enlarged explanatory view of the drying device.

The drying device 104 includes a contact heating means 10 that heats the continuous paper 110 by contacting the surface of the continuous paper 110 opposite to the surface to which the liquid is applied.

Further, the guide rollers 17A for guiding the continuous paper 110 sent from the transport unit 103 to the contact heating means 10 and the guide rollers 17B to 17F for guiding the continuous paper 110 that has passed through the contact heating means 10 are provided.

The contact heating means 10 is a curved contact with a plurality of first heating rollers 11A to 11G, which are first contact heating members having a curved contact surface in contact with the continuous paper 110, and also in contact with the continuous paper 110. It includes a heating drum 12 which is a second contact heating member having a surface. The diameters of the first heating rollers 11A to 11G may be different. The first heating rollers 11A to 11G and the heating drum 12 are all roller-shaped members.

The plurality of first heating rollers 11A to 11G (hereinafter, when not distinguished, referred to as "first heating roller 11"; the same applies to other members) are around the heating drum 12 in the transport direction of the continuous paper 110. It is arranged in an arc shape (or arc shape) along the.

Here, the heating drum 12 is a contact heating member having the maximum contact distance among the contact heating members that come into contact with the surface of the continuous paper 110 opposite to the liquid applying surface. Further, the heating rollers 11A to 11G are contact heating members on the upstream side in the transport direction from the heating drum 12 among the contact heating members that come into contact with the surface of the continuous paper 110 opposite to the liquid applying surface.

Then, as shown in FIG. 3, the contact distance L2 between the contact surface 12a of the heating drum 12 and the continuous paper 110 is larger than the contact distance L1 between the contact surfaces 11a of the heating rollers 11A to 11G and the continuous paper 110. The transport path is configured to be long. The "contact distance" is the distance at which the continuous paper 110 is in contact with the peripheral surface in the direction (conveying direction) along the circumferential direction of the heating drum 12 and the heating roller 11. When the contact heating member is a curved surface member having a curved surface as a contact surface, it is the distance in contact with the curved surface in the direction (conveying direction) along the circumferential direction of the curved surface.

Here, the winding angle θ2 of the continuous paper 110 with respect to the contact surface 12a of the heating drum 12 is larger than the winding angle θ1 of the continuous paper 110 with respect to the contact surface 11a of the heating roller 11 (θ2> θ1).

The winding angles θ2 and θ1 (collectively referred to as “wrapping angles θ”) end contact with the point Ps at which the continuous paper 110 starts contacting the contact surfaces 12a and 11a, as shown in FIG. It is the meaning of the angle formed by the point Pe to be formed with respect to the center O.

Therefore, when the winding angle θ becomes large, the contact distance becomes long if the diameter of the rotating body is the same, and the contact distance becomes long as the diameter of the rotating body becomes large even if the winding angle θ is the same.

In the present embodiment, the diameter of the heating drum 12 is larger than that of the heating roller 11, and the winding angle θ2 is larger than θ1, so that in any case, the contact surface 12a of the heating drum 12 and the continuous paper 110 The contact distance L2 is longer than the contact distance L1 between the contact surface 11a of the heating roller 11 and the continuous paper 110.

As described above, even if the winding angle θ is the same, the larger the diameter of the rotating body, the longer the contact distance. Therefore, even if the heating drum 12 and the heating roller 11 have the same diameter and the winding angle θ2 is larger than θ1, the contact distance L2 between the contact surface 12a of the heating drum 12 and the continuous paper 110 is the contact of the heating roller 11. The contact distance between the surface 11a and the continuous paper 110 is longer than the contact distance L1.

With such a configuration, cockling can be reduced and drying efficiency can be improved.

That is, since the strength of the continuous paper 110 is reduced when the time has not passed since the liquid was applied, the circumference of the rotating body is covered over a wide range (long contact distance) on the back surface side of the continuous paper 110. It is difficult to make close contact with the surface (contact surface).

Therefore, in the initial state in which the applied liquid has not been dried, the winding angle θ of the continuous paper 110 around the heating roller 11 is reduced to shorten the contact distance.

Here, by increasing the curvature of the heating roller 11, the tension generated during the transportation of the continuous paper 110 changes from the pressing force at the contact portion with the heating roller 11, so that the contact state with the heating roller 11 becomes uniform. Become. In this state, the continuous paper 110 is free from cockling and wrinkles, and when it passes through the heating roller 11, the liquid on the continuous paper 110 can be uniformly supplied with the heat required for drying.

As a result, the continuous paper 110, in which the cock ring is suppressed and the drying is progressing, can be brought into close contact with the contact surface even if the contact distance with the rotating body is lengthened.

The diameter of the heating roller 11 was changed, the height of the cock ring generated on the continuous paper 110 and the pitch of the cock ring were measured, and the presence or absence of a visually visible cock ring was confirmed. As a result, the diameter of the heating roller 11 was 200 mm. By setting the diameter of the heating roller 11 to 100 mm or less, the cock ring height is almost halved as compared with the case where the diameter of the heating roller 11 is 250 mm, and the cock ring is eliminated.

Therefore, the diameter of the heating roller 11 is preferably 200 mm or less, more preferably 100 mm or less.

In the heating drum 12 arranged on the downstream side of the heating roller 11, heat can be supplied to the continuous paper 110 in a short time by increasing the contact distance of the continuous paper 110, and the drying efficiency is improved. It can be dried in a short time.

By increasing the number of heating rollers 11 to be brought into contact with each other to increase the amount of heat for drying, it is possible to increase the drying rate and ensure high productivity even for a thick continuous body.

In this embodiment, a part of the guide roller may be a heating roller (heating member).

Further, infrared heaters 31A to 31C, which are heating means for heating the continuous paper 110 sent to the drying device 104, are arranged at the inlet portion of the drying device 104. Then, idler rollers (rollers that take the continuous paper 110) 16A to 16C, which are support members that support the continuous paper 110 facing the infrared heaters 31A to 31C, are arranged.

Further, warm air fans 32A to 32G for blowing warm air onto the continuous paper 110 facing the first heating roller 11 are arranged.

Next, a first example of temperature detection will be described with reference to FIGS. 4 and 5. FIG. 4 is a side view seen from the roller axial direction around one infrared heater, and FIG. 5 is an explanatory view of the roller longitudinal direction as well.

The length of the infrared heater 31 in the longitudinal direction is slightly longer than the width of the continuous paper 110 (width of the medium).

The idler roller 16 is arranged so as to face the infrared heater 31. A temperature sensor 33 is arranged as a temperature detecting means for detecting the temperature of the idler roller 16. The temperature sensor 33 may be either a contact type or a non-contact type.

The temperature sensor 33 is arranged directly below the idler roller 16. In this case, in the longitudinal direction of the roller, it is preferable that the temperature sensor 33 is arranged near the center position in the longitudinal direction of the roller.

Here, the reason why the temperature of the idler roller 16 is detected without directly detecting the temperature of the medium (continuously printed paper 110) is as follows. That is, since the characteristic value differs depending on the member (paper type) to be conveyed, if the temperature of the medium is directly detected, the standard for determining the abnormal temperature becomes complicated. Therefore, by indirectly detecting the temperature of the idler roller 16 which is arranged to face the heater and receives the same thermal force as the medium, it is possible to simplify the standard for determining the abnormal temperature.

Further, the temperature sensor 33 is arranged on the opposite side of the infrared heater 31 via the idler roller 16 for the following reasons.

That is, although the temperature sensor 33 can be arranged on the side surface side of the idler roller 16, it is likely to receive direct heat energy (radiant heat) from the infrared heater 31, and the temperature of the idler roller 16 may not be accurately detected. ..

Therefore, it is preferable to arrange the temperature sensor 33 at a position away from the infrared heater 31, and in this example, the temperature sensor 33 is arranged on the side opposite to the side where the infrared heater 31 is arranged with reference to the idler roller 16.

Further, by arranging the temperature sensor 33 on the opposite side of the idler roller 16 from the infrared heater 31, when the infrared sensor is used as the temperature sensor 33, the infrared rays emitted from the infrared sensor and the infrared heater 31 irradiate the infrared sensor 33. Interference with infrared rays can be suppressed.

Further, in the present embodiment, the idler roller 16 is arranged at a position above the heating drum 12. In this case, if the temperature sensor 33 is arranged in the vicinity of the idler roller 16, the steam emitted from the heating drum 12 may rise and the steam may adhere to the lens surface which is the detection unit of the temperature sensor 22. Therefore, when detecting the temperature of the idler roller 16 above the heating drum 12, it is preferable that the lens surface of the temperature sensor 33 faces the side opposite to the heating drum 12 side.

Next, a second example of temperature detection will be described with reference to FIGS. 6 and 7. FIG. 6 is a side view seen from the roller axial direction around one infrared heater, and FIG. 7 is a cross-sectional explanatory view of the roller longitudinal direction as well.

The length of the infrared heater 31 in the longitudinal direction is slightly longer than the width of the continuous paper 110 (width of the medium).

The idler roller 16 is arranged so as to face the infrared heater 31. Here, the idler roller 16 is a hollow roller (sleeve roller), and a temperature sensor 33 as a temperature detecting means for detecting the temperature of the idler roller 16 is arranged inside.

The temperature sensor 33 is preferably arranged inside the portion of the idler roller 16 that comes into contact with the continuous paper 110.

According to this second example, the temperature of the part that receives the most heat from the infrared heater 31 (the part that gets the hottest) can be quickly detected. That is, the portion that receives the most heat from the infrared heater 31 is the surface of the idler roller 16 on the infrared heater 31 side, but since the continuous paper 110 passes through the infrared heater 31 side, the temperature of the portion is directly detected. Can't. Therefore, by making the idler roller 16 hollow and using the inner surface of the idler roller 16 on the infrared heater 31 side as a detection surface, the temperature of the hottest portion of the idler roller 16 can be detected.

Next, the outline of the drying control unit will be described with reference to FIG. FIG. 8 is a block explanatory view for explaining the drying control unit.

The control unit 50 includes a CPU 51, a ROM 52, a RAM 53, an I / O, and other memories 54 (which may also be used as the ROM 52), and also serves as a means for performing the control according to the present invention, and controls the entire drying device 104. Control. The control unit 50 can also be configured as a part of the control unit of the entire printing apparatus.

The control unit 50 detects the transfer detection signal from the transfer detection means 61 that detects the transfer and stop of the transfer of the continuous book paper 110, the temperature sensor 62 that detects the temperature of the first heating roller 11, and the temperature that detects the temperature of the heating drum 12. Each detection signal of the temperature sensor 64 that detects the temperature of the sensor 63 and the warm air fan 32 is input.

The transport detecting means 61 detects, for example, the presence or absence of tension in the continuous paper 110, and detects the stop of transport when the tension is no longer detected. Further, the presence or absence of the continuous paper 110 may be detected at a predetermined position on the transport path of the continuous paper 110, and the stop of transport may be detected when the continuous paper 110 is not at the position.

Upon receiving the transport detection signal from the transport detection means 61, the control unit 50 turns on the infrared heater 31, which is a heating means, while the continuous paper 110 is being conveyed via the ON / OFF circuit 71. Control is performed to turn off the infrared heater 31 when the transport of the continuous paper 110 is stopped. Therefore, while the continuous paper 110 is being conveyed, the infrared heater 31 continuously heats the continuous paper 110, but since the continuous paper 110 moves and constantly heats a new portion, abnormal heating does not occur.

It should be noted that the detection of the start and stop of transport of the continuous paper 110 can also be discriminated (detected) by an instruction signal from the control unit that controls the entire printing apparatus.

The control unit 50 detects the roller temperature from the detection signal of the temperature sensor 62, controls the power supply to the heating source (heater) of the first heating roller 11 via the heater circuit 72, and heats the heating temperature by the first heating roller 11. Is controlled to reach the required temperature.

The control unit 50 detects the drum temperature from the detection signal of the temperature sensor 63, controls the power supply to the heating source (heater) of the heating drum 12 via the heater circuit 73, and the heating temperature by the heating drum 12 is the required temperature. Control to be.

The control unit 50 detects the temperature of the fan from the detection signal of the temperature sensor 64, and controls the heating temperature and the air volume of the hot air fan 32 via the fan drive unit 74.

Further, the control unit 50 inputs a detection signal of the temperature sensor 33 that detects the temperature of the idler roller 16.

The control unit 50 also serves as a means for performing control, and when the detection temperature T0, which is the temperature of the idler roller 16, becomes equal to or higher than a predetermined temperature Ta from the detection signal of the temperature sensor 33, the control unit 50 passes through the heater circuit 71. The infrared heater 31 is turned off.

In the present embodiment, the control unit 50 refers to the predetermined temperature Ta stored in the memory 54 and determines whether or not the detected temperature T0 is equal to or higher than the predetermined temperature Ta. For example, by conducting an experiment in advance, the continuous paper 110 can be continuously heated to confirm the temperature at which the continuous paper 110 is discolored, and a temperature lower than this temperature can be set as the predetermined temperature Ta.

Next, the control of the heating means (infrared heater) by the drying control unit will be described with reference to the flow chart of FIG.

The control unit 50 determines whether or not the transportation of the continuous paper 110 is started, and turns on the infrared heater 31 when the transportation of the continuous paper 110 is started.

Next, it is determined whether or not the transportation of the continuous paper 110 is stopped, and when the transportation of the continuous paper 110 is stopped, the infrared heater 31 is turned off.

On the other hand, when the transport of the continuous paper 110 is not stopped, the detection signal of the temperature sensor 33 is read to determine whether or not the detection temperature T0 of the idler roller 16 is equal to or higher than the predetermined temperature Ta (T0 ≧ Ta). Determine.

Here, if the detection temperature T0 is not equal to or higher than the predetermined temperature Ta, the process returns to the determination process of whether or not the transfer is stopped while the infrared heater 31 is kept on.

On the other hand, when the detection temperature T0 becomes equal to or higher than the predetermined temperature Ta, the infrared heater 31 is turned off to stop the heating.

That is, when it is erroneously detected that the continuous paper 110 is being conveyed even though the continuous paper 110 is stopped, the infrared heater 31 is continuously turned on, which is the same as that of the stopped continuous paper 110. The area will continue to be heated.

Therefore, the continuous paper 110 is normally conveyed, and the temperature of the idler roller 16 rises as compared with the case where the continuous paper 110 is heated by the infrared heater 31 while absorbing heat.

Therefore, when the temperature detected by the temperature sensor 33 that detects the temperature of the idler roller 16 becomes equal to or higher than a predetermined temperature, the infrared heater 31 is turned off and heating is stopped.

As a result, it is possible to prevent abnormal heating in which the same portion of the continuous paper 110 that has been stopped due to an erroneous transfer detection continues to be heated.

Next, the drying apparatus according to the second embodiment of the present invention will be described with reference to FIG. FIG. 10 is an explanatory view of a power supply path portion to the heating means in the drying device.

In the present embodiment, a cutting means 36 for cutting the power supply when the temperature of the idler roller 16 which is a support member reaches a predetermined temperature Ta or higher is provided in the power supply path 81 of the infrared heater 31.

The cutting means 36 is, for example, a thermostat, and the contactor (electromagnetic switch) of the thermostat opens and closes the electrical contact of the power supply path 81 to stop the energization of the infrared heater 31.

Further, the cutting means 36 detects that the detection temperature of the temperature sensor 33 has reached a predetermined temperature Ta or higher, and the contactor opens and closes the electrical contact of the power supply path 81 to stop the energization of the infrared heater 31. You may.

As a result, as in the first embodiment, when the temperature of the idler roller 16 becomes equal to or higher than the predetermined temperature Ta, the power supply path 81 to the infrared heater 31 is cut off, the infrared heater 31 is turned off, and heating is stopped. do.

Therefore, it is possible to prevent abnormal heating in which the same portion of the continuous paper 110 that has been stopped due to an erroneous transfer detection continues to be heated.

Next, a third embodiment of the present invention will be manually described with reference to FIG. FIG. 11 is an enlarged explanatory view of the drying apparatus according to the same embodiment.

In the present embodiment, the configuration of the printing apparatus other than the drying apparatus 104 is the same as that of the first embodiment.

The drying device 104 is a pressing roller 13 (13A to 13J) that presses the continuous paper 110 against the ten heating rollers 11 (11A to 11J), the heating drum 12, and the heating rollers 11 (11A to 11J) that form the contact heating means. It has.

Further, a guide roller 17A for guiding the continuous book paper 110 to the contact heating means 10 and a guide roller 17B for winding the continuous book paper 110 around the heating drum 12 are provided. Further, the heating rollers 14A and 14B which also serve as guide rollers for guiding the continuous paper 110 coming out of the contact heating means 10 are provided.

On the upstream side of the guide roller 17A, as in the first embodiment, the infrared heater 31, the idler roller 16 facing the infrared heater 31, and the temperature sensor 33 as a temperature detecting means for detecting the temperature of the idler roller 16 Is placed.

In the contact heating means 10, ten heating rollers 11 (11A to 11J), which are a plurality of contact heating members, are arranged in an arc shape around the heating drum 12. Here, ten heating rollers 11 (11A to 11J) are arranged so as to surround the heating drum 12.

Of the peripheral surface of the heating roller 11, the heating drum 12 side is the inner region, and the side opposite to the heating drum 12 is the outer region. In this case, since the heating roller 11 rotates, the peripheral surface portions that are the inner region and the outer region change sequentially.

Here, the continuous paper 110 guided by the contact heating means 10 by the guide roller 17A is conveyed in the Y1 direction, which is the first direction, while contacting the outer region of the peripheral surface of the heating rollers 11A to 11J. It reaches the peripheral surface of the heating drum 12. Then, after contacting the heating drum 12 over almost the entire circumference and passing through the heating drum 12, the guide roller 17B guides the heating drum 12 again to the heating roller 11J.

The continuous paper 110 guided by the heating rollers 11J is pressed by the pressing rollers 13A to 13J against the inner region of the peripheral surface of the heating rollers 11J to 11A, and is in contact with the heating rollers 13A to 13J again. It is conveyed in the Y2 direction, which is the direction, and is guided to the downstream side of the contact heating means 10.

That is, the transport path in which the continuous paper 110 is conveyed while contacting the plurality of heating rollers 11A to 11J is in the first direction (Y1 direction) while the continuous paper 110 is in contact with the plurality of heating rollers 11A to 11J. It includes a first path to be conveyed and a second path to be conveyed in the second direction (Y2 direction) while recontacting the plurality of heating rollers 11J to 11A that have come into contact with each other in the first path.

As a result, while suppressing the increase in size of the apparatus, the number of heating rollers 11 is increased to increase the drying speed, and the contact surface (peripheral surface) of the heating rollers 11 is contacted twice at different positions at the same time. We are trying to further improve the drying speed.

In this way, the members that are simultaneously conveyed are brought into contact with two different locations of the same contact heating member (heating roller) to heat them.

This makes it possible to dry the members that are efficiently transported with a small number of contact heating members.

Next, a fourth embodiment of the present invention will be manually described with reference to FIG. FIG. 12 is an enlarged explanatory view of the drying device according to the same embodiment.

This embodiment is an example in which guide plates 18A to 18C as support members for supporting the continuous book paper 110 are arranged instead of the idler roller 16 in the first embodiment.

In the above embodiment, the configuration is described in which a plurality of first contact heating members are continuously arranged, but a simple roller (rotating body) other than the contact heating members may be arranged in the middle.

Next, the printing apparatus according to the fifth embodiment of the present invention will be described with reference to FIG. FIG. 13 is a schematic explanatory view of the printing apparatus.

In this printing apparatus, between the original winding roller 102 and the take-up roller 105, a first printing unit 1001 that prints and dries on one side of the continuous book paper 110 and a continuous printing unit 1001 printed on one side. An inversion unit 1003 that reverses the front and back sides of the paper 110 and a second printing unit 1002 that prints and dries on the other side of the continuous paper 110 are arranged.

The configurations of the liquid applying unit 101, the transporting unit 103, and the drying device 104 of the first printing unit 1001 and the second printing unit 2 are substantially the same as those of the first embodiment (may be the same), but the second to second to the above. It can be the same as or almost the same as that of the fourth embodiment.

Here, the liquid application unit 101 of the first printing unit 1001 serves as a first liquid application means for applying liquid to the first surface of the continuous paper 110, which is a conveyed member. The liquid application unit 101 of the second printing unit 1002 serves as a second liquid application means for applying liquid to the second surface of the continuous book paper 110, which is a conveyed member, on the side opposite to the first surface.

Further, the drying device 104 of the first printing unit 1001 is a first drying device in which the first surface of the continuous paper 110 comes into contact with the heating roller 11. The drying device 104 of the second printing unit 1002 is a second drying device in which the second surface of the continuous paper 110 comes into contact with the heating roller 11.

In each of the above embodiments, the example in which the member to be conveyed is a continuous paper is described, but the present invention is not limited to this, and the member is not particularly limited as long as it is a member conveyed by the drying apparatus according to the present invention. For example, in addition to continuous paper, roll paper, a continuum such as a web, and a recording medium (printed matter) such as a long sheet material, a printed matter such as a wallpaper, a sheet for an electronic circuit board such as a prepreg may be used.

In addition to recording images such as characters and figures with a liquid such as ink, the members transported by the printing device are ink with meaningless images such as patterns for the purpose of decoration and decoration. It may be given with a liquid such as.

In the present application, the liquid applied to the conveyed member is not particularly limited, but it is preferable that the liquid has a viscosity of 30 mPa · s or less at room temperature, under normal pressure, or by heating or cooling. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, polymerizable compounds, resins, functionalizing materials such as surfactants, biocompatible materials such as DNA, amino acids and proteins, and calcium. , Solvents, suspensions, emulsions, etc. containing edible materials such as natural pigments, etc., for example, inks for inkjets, surface treatment liquids, components of electronic elements and light emitting elements, and formation of electronic circuit resist patterns. It can be used for applications such as a liquid for use and a material liquid for three-dimensional modeling.

When a liquid discharge head is used as a liquid applying means, a piezoelectric actuator (laminated piezoelectric element and thin film piezoelectric element), a thermal actuator using an electric heat conversion element such as a heat generating resistor, and vibration are used as an energy generation source for discharging the liquid. Those using an electrostatic actuator composed of a plate and a counter electrode are included.

Note that printing in the present application has the same meaning as image formation, recording, printing, printing, and the like.

10 Contact heating means 11A to 11G Heating roller (first heating member)
12 Heating drum (second heating member)
16 Idler roller (support member)
17A to 17F Guide roller 31A to 31C Infrared heater (heating means)
33 Temperature sensor (temperature detection means)
50 Control unit (heating control means)
101 Liquid application unit 103 Transport unit 104 Drying device 110 Continuously printed paper (conveyed member)

Claims (10)

A drying device that dries a member to be transported to which a liquid is applied.
A heating means for heating the conveyed member and
A support member that faces the heating means and supports the conveyed member,
A means for controlling the heating means to be turned on while the transported member is being transported and the heating means to be turned off when the transportation of the transported member is stopped.
A temperature detecting means for detecting the temperature of the support member is provided.
The means for performing the control is the heating means when the temperature detected by the temperature detecting means becomes equal to or higher than a predetermined temperature when the transporting of the transported member is not stopped after the transport of the transported member is started. A drying device characterized by turning off the temperature. The drying apparatus according to claim 1, wherein the support member is a roller. The drying apparatus according to claim 2, wherein the roller is a hollow roller, and the temperature detecting means is arranged inside. The drying apparatus according to claim 3, wherein the detection surface by the temperature detecting means is an inner surface of the hollow roller on the heating means side. The heating means is an infrared heater.
The drying device according to claim 1 or 2, wherein the temperature detecting means is arranged on the side opposite to the infrared heater with the support member interposed therebetween. The contact heating member that comes into contact with the transported member and heats the transported member is arranged on the downstream side of the transported member in the transport direction with respect to the heating means.
The support member and the temperature detecting means are arranged above the contact heating member, and the support member and the temperature detecting means are arranged.
The drying apparatus according to claim 1, wherein the detection unit of the temperature detecting means faces the side opposite to the contact heating member. A plurality of contact heating members that come into contact with and heat the member to be transported are arranged on the downstream side in the transport direction of the member to be transported from the heating means.
The transport path of the member to be transported includes a first transport path that is transported while contacting the contact heating member and a second transport that is transported while recontacting the contact heating member that is in contact with the first transport path portion. The drying apparatus according to claim 1, wherein the drying apparatus includes a route. A contact heating means for contacting and heating the transported member is provided downstream of the heating means in the transport direction of the transported member.
The contact heating means has a first contact heating member having a curved contact surface that comes into contact with the conveyed member, and a curved surface that is arranged on the downstream side of the conveyed member in the conveying direction and comes into contact with the conveyed member. Including a second contact heating member having a contact surface,
The first aspect of the present invention is characterized in that the contact distance between the contact surface of the second contact heating member and the conveyed member is longer than the contact distance between the contact surface of the first contact heating member and the conveyed member. The drying device described. A drying device that dries a member to be transported to which a liquid is applied.
A heating means for heating the conveyed member and
A support member that faces the heating means and supports the conveyed member,
A means for controlling the heating means to be turned on while the transported member is being transported and the heating means to be turned off when the transportation of the transported member is stopped.
A cutting means for cutting off the power supply to the heating means when the transport of the transported member is not stopped after the transport of the transported member is started and the temperature of the support member reaches a predetermined temperature is provided. A drying device characterized by that. A liquid applying means for applying a liquid to a member to be transported, and a liquid applying means.
A printing apparatus comprising the drying apparatus according to any one of claims 1 to 9.

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