JP7065568B2 - 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 one that promotes the drying of the applied liquid and reduces cockling (waviness due to swelling) of the continuous paper or the like.

For example, with respect to a heating roller and a heating roller, in which a base material to which a liquid is applied is wound around an outer peripheral surface and rotates while heating the base material to transport the base material along a transport path on the outer peripheral surface. In some cases, a plurality of guide rollers having a diameter smaller than that of the heating roller for guiding the base material are arranged (Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-152964

However, the configuration disclosed in Patent Document 1 has a problem that cockling generated in a conveyed member such as a continuous paper cannot be sufficiently suppressed.

The present invention has been made in view of the above problems, and an object thereof is to reduce cockling and to perform efficient drying.

In order to solve the above problems, the drying apparatus according to the present invention is
A device that dries a member to which a liquid is applied and is conveyed.
A contact heating means for contacting the conveyed member to heat the conveyed member is provided.
The contact heating means includes a plurality of heating members arranged side by side in the transport direction and having a curved contact surface in contact with the transport member.
Among the heating members that come into contact with the surface of the conveyed member opposite to the liquid applying surface, the heating member having the maximum contact distance is designated as the first heating member, and is located upstream of the first heating member in the transport direction. When the heating member that comes into contact with the surface of the conveyed member opposite to the liquid-applying surface, has a shorter contact distance than the first heating member, and has a larger curvature is used as the second heating member.
The second heating member is arranged one before and two before the first heating member, respectively.
The conveyed member contacts the second heating member arranged one before and two before the first heating member, and then contacts the first heating member.
The heating member is a roller-shaped member and is a roller-shaped member.
The diameter of the first heating member is larger than the diameter of the second heating member.
The winding angle of the conveyed member with respect to the contact surface of the first heating member is larger than the winding angle of the conveyed member with respect to the contact surface of the second heating member.
It was configured.

According to the present invention, cockling can be reduced and efficient drying can be performed.

It is a 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 which provides the explanation of the winding angle around a heating roller and a heating drum. It is an enlarged explanatory view of the drying apparatus in 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 an enlarged explanatory view of the drying apparatus in 5th Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus in 6th Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus in 7th Embodiment of this invention. It is explanatory drawing of an example of the infrared heating means of the drying apparatus. It is an enlarged explanatory view of the drying apparatus in 8th Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus in 9th Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus in 10th Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus in 11th Embodiment of this invention. It is explanatory drawing which provides the explanation of the arrangement of the temperature sensor in the same embodiment. It is a block diagram of the part related to the temperature control of the 1st infrared ray heating means and the 2nd heating member in the same embodiment. It is a schematic explanatory drawing of the printing apparatus which concerns on the twelfth 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 unit 101 including a liquid ejection head which is a liquid applying means for ejecting and applying ink which is a liquid of a required color to a continuous paper 110 which is a conveyed member. have.

In the liquid application section 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 unwound from the original winding roller 102, is fed 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 is 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 up by the take-up roller 105.

Next, the drying apparatus according to the first embodiment will be described with reference to FIGS. 2 and 3. FIG. 2 is an enlarged explanatory view of the drying apparatus, and FIG. 3 is an explanatory diagram provided for explaining the winding angle around the heating roller and the heating drum.

The drying device 104 includes a contact heating means 10 for heating 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 and 17B for guiding the continuous book paper 110 to the contact heating means 10 and the guide rollers 17C to 17I for guiding the continuous book paper 110 that has passed through the contact heating means 10 are provided.

The contact heating means 10 has heating rollers 11A to 11E which are a plurality of heating members having a curved contact surface 11a in contact with the continuous paper 110, and a curved contact surface 12a also in contact with the continuous paper 110. A heating drum 12 is included.

Here, the heating drum 12 is a first heating member as a heating member having the maximum contact distance among the heating members that come into contact with the surface of the continuous book paper 110 that is the member to be conveyed, which is opposite to the liquid-applying surface. Downstream heating member). Further, the heating rollers 11A to 11E are heating members on the upstream side in the transport direction from the first heating member among the heating members that come into contact with the surface of the continuous paper 110 that is the member to be transported and that is opposite to the liquid-applying surface. It is a second heating member (upstream heating member).

The diameters of the heating rollers 11A to 11E may be different. The heating rollers 11A to 11E and the heating drum 12 are all roller-shaped members.

The plurality of heating rollers 11A to 11E (hereinafter, referred to as "heating rollers 11" when not distinguished) and the heating drum 12 are arranged in an arc shape along the transport direction of the continuous paper 110.

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 11E 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 heating member is a curved surface member having a curved surface as a contact surface (curved surface heater 21 described later), 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).

As shown in FIG. 3, the winding angles θ2 and θ1 (which are collectively referred to as “wrapping angle θ”) end contact with the point Ps at which the continuous paper 110 starts contacting the contact surfaces 12a and 11a. The point Pe is the meaning of the angle formed with respect to the center O.

Therefore, when the winding angle θ is large, the contact distance is long if the diameter of the rotating body is the same, and the contact distance is long as the diameter of the rotating body is 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 that of θ1. Therefore, in any case, the contact surface 12a of the heating drum 12 and the continuous paper 110 are used. 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 has decreased in a state where 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 whose cockling is suppressed and whose drying is progressing can be brought into close contact with the contact surface even if the contact distance with the rotating body is lengthened.

In particular, by setting the diameter of the heating roller 11 to 100 mm or less, cockling can be reliably suppressed.

Therefore, 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 lengthening the contact distance of the continuous paper 110, and the drying efficiency is improved. It can be improved and 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 speed and ensure high productivity even for a thick continuous body.

In this embodiment, a part of the guide rollers 17C to 17I may be used as a heating roller (heating member). Further, a blower device such as a blower fan for blowing wind on the continuous paper 110 in the area of the contact heating means 10 can also be provided.

Next, the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an enlarged explanatory view of the drying device in the same embodiment.

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

The drying device 104 includes five heating rollers 11 (11A to 11E) constituting the contact heating means 10 and a heating drum 12. Further, the guide rollers 17A on the upstream side of the contact heating means 10 and the guide rollers 17B to 17F on the downstream side are provided.

The arrangement of the heating roller 11E, the heating drum 12, and the guide roller 17B constitutes a transport path (transport path) in which the continuous paper 110 makes a U-turn on the outer peripheral surface (contact surface 12a) of the heating drum 12.

With this configuration, the contact distance of the continuous paper 110 in contact with the contact surface of the heating drum 12 becomes longer than in the first embodiment, and the drying efficiency is further improved.

Next, the third embodiment of the present invention will be described with reference to FIG. FIG. 5 is an enlarged explanatory view of the drying device in the same embodiment.

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

The drying device 104 includes seven heating rollers 11 (11A to 11G) constituting the contact heating means 10 and a heating drum 12. Further, the guide rollers 17A to 17I are provided.

Here, in the contact heating means 10, seven heating rollers 11 (11A to 11G) are arranged in an arc shape around the heating drum 12. Here, the distances from the center of the heating drum 12 to the center of each heating roller 11 are the same, but the center of the heating drum 12 and the center of the arc of the heating roller 11 arranged in an arc shape coincide with each other. do not have to.

As a result, when the continuous paper 110 is contacted and conveyed over the plurality of heating rollers 11, the continuous paper 110 is not loaded and can be conveyed with an appropriate tension.

Then, the continuous paper 110 guided to the contact heating means 10 by the guide roller 17D is in contact with the outside of the peripheral surface of the heating rollers 11A to 11G (the side away from the center side of the arc), and the peripheral surface of the heating drum 12 is contacted. After contacting the peripheral surface of the heating drum 12 within a winding angle of approximately 90 °, a transport path is configured to be guided to the downstream side of the contact heating means 10 by the guide roller 17E.

As a result, the winding angle of the continuous paper 110 with respect to the heating drum 12 becomes larger than the winding angle with respect to the heating roller 11, and the contact distance of the continuous paper 110 with respect to the heating drum 12 becomes longer than the contact distance with respect to the heating roller 11.

Further, in the present embodiment, warm air devices 19A to 19G as non-contact heating means are arranged facing the heating rollers 11A to 11G.

With such a configuration, it is possible to increase the number of heating rollers 11 and increase the drying speed while suppressing the increase in size of the apparatus.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is an enlarged explanatory view of the drying device in the same embodiment.

In the present embodiment, the configuration of the printing device other than the drying device 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 10 heating rollers 11 (11A to 11J), the heating drum 12, and the heating rollers 11 (11A to 11J) constituting the contact heating means. It is equipped with.

Further, the contact heating means 10 is provided with guide rollers 17A to 17D for guiding the continuous book paper 110, and guide rollers 17E for winding the continuous book paper 110 around the heating drum 12. 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.

In the contact heating means 10, ten heating rollers 11 (11A to 11J) 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 to the contact heating means 10 by the guide roller 17D 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 17E guides the heating drum 12 again to the heating roller 11J.

The continuous paper 110 guided by the heating rollers 11J is pressed against the inner region of the peripheral surface of the heating rollers 11J to 11A by the pressing rollers 13A to 13J, 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 device, 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 to two different locations of the same heating member (heating roller) are brought into contact with each other to heat them.

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

Next, a fifth embodiment of the present invention will be described with reference to FIG. 7. FIG. 7 is an enlarged explanatory view of the drying device in the same embodiment.

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

Further, the drying device 104 includes a curved surface heating member 21 having a curved contact surface instead of the heating roller 11 constituting the contact heating means 10 of the first embodiment, and similarly replaces the heating drum 12. A curved surface heating member 22 having a curved contact surface is provided.

Even with such a configuration, the same effect as that of the first embodiment can be obtained.

The present embodiment can also be applied to the configurations and arrangements of the second and third embodiments. Further, when applied to the configuration and arrangement of the fourth embodiment, instead of one heating roller 11, two curved surface heating portions corresponding to the outer region and the inner region of the peripheral surface of the heating roller 11 are used. The member 21 may be arranged.

Next, the sixth embodiment of the present invention will be described with reference to FIG. FIG. 8 is an enlarged explanatory view of the drying device in the same embodiment.

In the present embodiment, the infrared heaters 31A to 31C, which are the first infrared heating means, are arranged on the upstream side of the heating rollers 11 which are the plurality of second heating members at the inlet portion of the drying device 104.

The infrared heater 31 irradiates the conveyed continuous paper 110 with infrared rays having a maximum wavelength within the absorption wavelength band of water. Here, the infrared heater 31 irradiates infrared rays having a maximum wavelength within a band of 2 to 6 μm.

This makes it possible to evaporate the water content of the liquid at an early stage.

Further, the infrared heater 32A, which is a second infrared heating means, irradiates infrared rays having a maximum wavelength within the absorption wavelength band of the solvent contained in the liquid in the region where the heating rollers 11 which are the plurality of second heating members are arranged. ~ 32G is arranged. Here, the infrared heater 32 irradiates infrared rays having a maximum wavelength within a band of 3 to 8 μm.

This allows the liquid solvent to evaporate.

Here, the infrared heaters 32A to 32F, which are the second infrared heating means, are between the heating rollers 11 which are adjacent second heating members, and the infrared heaters 32A to 32G are between the heating rollers 11G and the heating drum 12. Each is arranged.

By arranging the infrared heater between the adjacent contact-type heating members in this way, it is possible to achieve the effect of maintaining the effect of raising the temperature of the continuous paper.

Next, the seventh embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG. 9 is an enlarged explanatory view of the drying device according to the embodiment, and FIG. 10 is an explanatory view of an example of the infrared heating means of the drying device.

In the present embodiment, the inlet portion of the drying device 104 is located on the upstream side of the heating roller 11 which is a plurality of second heating members, and a region (with the heating roller 11) in which the heating roller 11 which is a plurality of second heating members is arranged. Third infrared heating means 33 (33A to 33J) are arranged in each of the heating drums 12 and the like).

The third infrared heating means 33 irradiates infrared rays having a maximum wavelength within the absorption wavelength band of the solvent contained in the liquid, except for the maximum wavelength at which water absorbs infrared rays. Here, except for 2 μm, 3 μm, and 6 μm in which water absorbs infrared rays, infrared rays having a maximum wavelength within the absorption wavelength band of the solvent are irradiated.

In other words, when using a medium such as continuous paper with weak stiffness, when the medium is irradiated with infrared rays that evaporate the solvent component in order to dry the liquid containing the solvent, the infrared rays also include the infrared absorption band of water. Therefore, even the water contained in the medium is heated. Therefore, shrinkage occurs in the portion of the medium (blank paper portion) to which the liquid is not applied, and cocklin is generated.

Therefore, in the present embodiment, the solvent component of the portion (printed portion) to which the liquid is applied is evaporated while the heating of the moisture in the medium is suppressed, and only the printed portion is heated to heat the medium having a weak stiffness. It is possible to prevent cockling from occurring.

Here, in order to irradiate infrared rays having a specific wavelength, for example, as shown in FIG. 10, infrared rays emitted from an infrared heater 34, which is an infrared irradiation means, are passed through an infrared filter 35 that blocks a specific wavelength. This can be done by removing infrared rays of a specific wavelength.

Specifically, the infrared filter 35 cuts infrared rays of 2 μm, 3 μm, and 6 μm and irradiates the continuous paper 110.

The infrared heating means may also be configured as an infrared irradiation means that generates infrared rays having a wavelength in a specific band.

Next, the eighth embodiment of the present invention will be described with reference to FIG. FIG. 11 is an enlarged explanatory view of the drying device in the same embodiment.

In the present embodiment, in the first embodiment (may be the second to fifth embodiments), the radiant heating means 36A to 36E composed of an infrared lamp, a halogen lamp, or the like facing the heating roller 11 portion. Is placed. It should be noted that, as in the sixth embodiment, the heating rollers 11 may be arranged so as to face each other.

Here, the two radiant heating means 36 adjacent to each other in the transport direction are the radiant heating means 36 and the continuous book on the downstream side of the distance G between the radiant heating means 36 on the upstream side and the continuous paper 110 (heating roller 11). The distance G from the paper 110 (heating roller 11) is widened.

Specifically, the intervals G are arranged so as to be sequentially widened from the radiant heating means 36A on the most upstream side toward the radiant heating means 36E on the downstream side. Assuming that the amount of heat is the same, the amount of heat given to the continuous paper 110 decreases as the interval G becomes wider.

As a result, the amount of heat can be changed according to the degree to which the liquid permeates the continuous paper 110 while keeping the amount of heat of the plurality of radiant heating means 36 the same.

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

In this embodiment as well, in the first embodiment (which may be the second to fifth embodiments), the radiant heating means 36A to 36E are arranged so as to face the portion of the heating roller 11. It should be noted that, as in the sixth embodiment, the heating rollers 11 may be arranged so as to face each other.

Here, the two radiant heating means 36 adjacent to each other in the transport direction are relative to the continuous book paper 110 of the radiant heating means 36 on the downstream side of the inclination θ in the radiant direction with respect to the continuous book paper 110 of the radiant heating means 36 on the upstream side. The slope θ in the radiation direction is increased. The inclination θ is the inclination of the energy emitting surface of the radiant heating means 36 with respect to the vertical line on the surface of the continuous book paper 110, and increasing the inclination θ means that the slope of the energy method does not face the continuous book paper 110. be.

Specifically, the radiant heating means 36A on the most upstream side is arranged so that the inclination θ in the radiant direction gradually increases from the radiant heating means 36A on the downstream side toward the radiant heating means 36E on the downstream side. Assuming that the amount of heat is the same, the amount of heat given to the continuous paper 110 decreases as the inclination θ increases.

As a result, the amount of heat can be changed according to the degree to which the liquid permeates the continuous paper 110 while keeping the amount of heat of the plurality of radiant heating means 36 the same.

Next, the tenth embodiment of the present invention will be described with reference to FIG. FIG. 13 is an enlarged explanatory view of the drying device in the same embodiment.

In the present embodiment, a plurality of radiant heating means 36 are arranged so as to be movable (advance and retreat) in the direction of the arrow with respect to the continuous paper 110 so that the interval G can be changed.

Thereby, by changing the position of each radiant heating means 36, the amount of heat given to the continuous paper 110 can be changed, and the arrangement in which the interval G changes as in the eighth embodiment is also possible. Is.

In this case, it is also possible to arrange the plurality of radiant heating means 36 so as to be swingable so that the inclination of the radiant direction with respect to the continuous paper 110 can be changed as in the ninth embodiment.

Next, the eleventh embodiment of the present invention will be described with reference to FIG. FIG. 14 is an enlarged explanatory view of the drying device in the same embodiment.

The drying device 104 is a pressing roller 13 (13A to 13E) that presses the continuous paper 110 against the six heating rollers 11 (11A to 11F), the heating drum 12, and the heating rollers 11 (11A to 11F) constituting the contact heating means 10. ) Is provided.

Further, the guide roller 17A for guiding the continuous book paper 110 to the heating roller 11A, the guide roller 17F for winding the continuous book paper 110 around the heating drum 12, and the continuous book paper 110 pulled out by contacting the heating roller 11A for the second time. The guide rollers 17B to 17E are provided to guide the guide.

Also in the present embodiment, as in the fourth embodiment, the transport path in which the continuous paper 110 is conveyed while contacting the plurality of heating rollers 11A to 11F is such that the continuous paper 110 is conveyed to the plurality of heating rollers 11A to 11F. A second path that is guided by the contact guide rollers 13A to 13E to the first path that is conveyed while being in contact and the plurality of heating rollers 11J to 11F that are in contact with each other in the first path, and is conveyed in the second direction while being in contact again. Includes routes.

In the present embodiment, the infrared heaters 31A to 31E, which are the first infrared heating means, are arranged between the heating rollers 11 and 11. Further, infrared heaters 31F to 31H, which are the first infrared heating means, are also arranged on the upstream side of the heating roller 31A.

As described above, the infrared heater 31 irradiates the conveyed continuous paper 110 with infrared rays having a maximum wavelength within the absorption wavelength band of water. Here, the infrared heater 31 irradiates infrared rays having a maximum wavelength within a band of 2 to 6 μm.

Next, the temperature control of the first infrared heating means and the second heating member in the present embodiment will be described with reference to FIGS. 15 and 16. FIG. 15 is an explanatory diagram provided for explaining the arrangement of the temperature sensor, and FIG. 16 is a block diagram of a portion related to temperature control of the first infrared heating means and the second heating means.

On the downstream side of the infrared heater 31 which is the first infrared heating means, temperature sensors 41 (41A to 41E) which are temperature detecting means for detecting the temperature of the continuous paper 110 are arranged. In FIG. 16, the infrared heater 31 is referred to as a "first infrared heating means".

Then, the detection signal of each temperature sensor 41 corresponding to the downstream portion of each infrared heater 31 is input to the control unit 50. The control unit 50 controls the wavelength of infrared rays emitted from each infrared heater 31 and the temperature of each heating roller 11 according to the detection temperature obtained from the detection signal of the temperature sensor 41. The temperature of either the infrared heater 31 or the heating roller 11 may be controlled.

In the infrared heater 31, the temperature of the heat source is lowered by lowering the input voltage (applied voltage), and the maximum wavelength of the infrared rays to be irradiated becomes longer.

In order to evaporate the liquid, it is necessary to raise the temperature as much as possible to increase the vapor pressure of the liquid, while if the temperature of the member to which the liquid is applied is raised too much, damage such as blister and yellowing will occur. Since it may occur, it is necessary to control it within an appropriate temperature range.

Therefore, for example, in order to control the temperature of the continuous paper 110, which is a member to which the liquid is applied, between 100 and 150 ° C., the control unit 50 detects the temperature on the downstream side of the infrared heater 31 by the temperature sensor 41. When the detection temperature of the paper sheet 110 is 100 ° C. or lower, the control is performed to increase the applied power so as to irradiate infrared rays having a maximum wavelength of 2 μm, and the applied power to the heating roller 11 is increased to raise the temperature.

Further, when the detection temperature is 150 ° C. or higher, control is performed to reduce the applied power so that the maximum wavelength of the infrared heater becomes long, for example, to irradiate infrared rays having a maximum wavelength of 3 to 8 μm, and the heating roller 11 is subjected to control. Control is performed to lower the temperature by lowering the applied power.

That is, the control unit 50 controls the applied voltage to the infrared heater 32 so that the detected temperature of the continuous paper 110 detected on the downstream side of the infrared heater 31 by the temperature sensor 41 is between 100 ° C and 150 ° C.

In this way, by controlling the applied power to the first infrared heating means and the second heating member, the temperature of the member to which the liquid is applied can be quickly controlled, so that the transfer speed of the transferred member is increased. You will be able to improve your productivity.

Although the example of controlling the heating temperature of the first infrared ray heating means and the second heating member is described here, the heating temperature of at least one of the heating temperature of the first infrared ray heating means and the second heating member is set. It can also be configured to be controlled. Similarly, in the configuration in which the second infrared ray heating means is arranged, the heating temperature of at least one of the second infrared ray heating means and the second heating member may be controlled.

Next, the printing apparatus according to the twelfth embodiment of the present invention will be described with reference to FIG. FIG. 17 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 that prints on one side are printed on one side. A reversing unit 1003 that reverses the front and back of the book paper 110 and a second printing unit 1002 that prints and dries on the other side of the continuous book paper 110 are arranged.

The configurations of the liquid applying unit 101, the transport 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 eleventh embodiment.

Here, the liquid applying unit 101 of the first printing unit 1001 serves as a first liquid applying 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 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 second 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 first 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 continuous body such as a web, and a recording medium (printed matter) such as a long sheet material, a printed matter such as a wallpaper or 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 liquids such as ink, the members transported by the printing device are inked with images that have no meaning such as patterns for the purpose of decoration and decoration. It may be applied with a liquid such as.

In the present application, the liquid to be applied is not particularly limited, but is preferably one having 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, functionalizable materials such as polymerizable compounds, resins and surfactants, biocompatible materials such as DNA, amino acids and proteins, and calcium. , Solutions, suspensions, emulsions, etc. containing edible materials such as natural dyes, 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 in applications such as liquids and material liquids 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 type 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 consisting 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 11J Heating roller (second heating member)
12 Heating drum (first heating member)
13A to 13J Pushing roller 17A to 17I Guide roller 31A to 31C Infrared heater (first infrared heating means)
32A-32G infrared heater (second infrared heating means)
33A-33J 3rd Infrared Heating Means 34 Infrared Heaters 35 Infrared Filters 36A-36E Radiant Heating Means 101 Liquid Applying Unit 103 Transporting Unit 104 Drying Device 110 Continuously Paper (Conveyed Member)

Claims (18)

A device that dries a member to which a liquid is applied and is conveyed.
A contact heating means for contacting the conveyed member to heat the conveyed member is provided.
The contact heating means includes a plurality of heating members arranged side by side in the transport direction and having a curved contact surface in contact with the transport member.
Among the heating members that come into contact with the surface of the conveyed member opposite to the liquid applying surface, the heating member having the maximum contact distance is designated as the first heating member, and is located upstream of the first heating member in the transport direction. When the heating member that comes into contact with the surface of the conveyed member opposite to the liquid-applying surface, has a shorter contact distance than the first heating member, and has a larger curvature is used as the second heating member.
The second heating member is arranged one before and two before the first heating member, respectively.
The conveyed member contacts the second heating member arranged one before and two before the first heating member, and then contacts the first heating member.
The heating member is a roller-shaped member and is a roller-shaped member.
The diameter of the first heating member is larger than the diameter of the second heating member.
The winding angle of the conveyed member with respect to the contact surface of the first heating member is larger than the winding angle of the conveyed member with respect to the contact surface of the second heating member.
A drying device characterized by that. The drying apparatus according to claim 1, wherein the second heating member and the first heating member are arranged in an arc shape. The drying device according to claim 1 , wherein the second heating member is arranged so as to surround the first heating member. The drying device according to claim 1 , wherein the second heating member is arranged in an arc shape or an arc shape around the first heating member. The drying apparatus according to any one of claims 1 to 4 , further comprising a non-contact heating means for heating the conveyed member in a non-contact manner. The transport path in which the transported member is transported while in contact with the second heating member is
A first path in which the conveyed member is conveyed while in contact with the second heating member, and a second path in which the conveyed member is conveyed while being in contact with at least one second heating member in contact with the first path. The drying apparatus according to any one of claims 1 to 5 , wherein the drying apparatus comprises. The drying apparatus according to claim 1, wherein a first infrared heating means for irradiating infrared rays having a maximum wavelength within the absorption wavelength band of water is arranged on the upstream side of the second heating member. The claim is characterized in that, in the region where the second heating member is arranged, a second infrared ray heating means for irradiating infrared rays having a maximum wavelength within the absorption wavelength band of the solvent contained in the liquid is arranged. The drying apparatus according to 1. A first infrared heating means for irradiating the conveyed member with infrared rays having a maximum wavelength within the absorption wavelength band of water.
A temperature detecting means for detecting the temperature of the surface of the conveyed member, and
The first aspect of the present invention is characterized in that the first infrared ray heating means and the means for controlling the heating temperature of at least one of the second heating members are provided based on the temperature detected by the temperature detecting means. Drying device. The drying apparatus according to claim 8 , wherein the second infrared heating means irradiates infrared rays having a maximum wavelength within a band of 3 to 8 μm. The drying apparatus according to claim 8 or 10 , wherein the second infrared heating means is arranged between adjacent second heating members. It has a third infrared heating means that irradiates the conveyed member with infrared rays.
The third infrared heating means according to claim 1, wherein the third infrared heating means irradiates infrared rays having a maximum wavelength within the absorption wavelength band of the solvent contained in the liquid, except for the maximum wavelength at which water absorbs the infrared rays. Drying device. The third infrared heating means is
Infrared irradiation means that irradiates infrared rays and
The drying apparatus according to claim 12 , further comprising a filter that absorbs a component having a maximum wavelength in which water absorbs infrared rays among the infrared rays emitted from the infrared irradiation means. At least two radiant heating means for heating the transported member are arranged along the transport direction.
The two radiant heating means have different distances from the members to be transported.
The drying apparatus according to claim 1, wherein the distance between the radiant heating means on the downstream side and the member to be transported is wider than the distance between the radiant heating means on the upstream side and the member to be transported. .. At least two radiant heating means for heating the transported member are arranged along the transport direction.
The first aspect of claim 1 is characterized in that the inclination of the radiant heating means on the upstream side in the radiant direction with respect to the conveyed member is larger than the inclination of the radiant heating means on the downstream side with respect to the conveyed member. The drying device described. A radiant heating means for heating the member to be transported along the transport direction is provided.
The radiant heating means is characterized in that it is possible to change the distance from the conveyed member or to change the inclination of the radiant direction with respect to the conveyed member. The drying device described in. A liquid applying means for applying a liquid to a member to be conveyed,
A printing apparatus comprising the drying apparatus according to any one of claims 1 to 16 . A first liquid applying means for applying a liquid to the first surface of the conveyed member,
A first drying device composed of the drying device according to any one of claims 1 to 16 , which is arranged on the downstream side in the transport direction of the first liquid applying means.
A second liquid applying means, which is arranged on the downstream side in the transport direction of the first drying device and applies liquid to a second surface which is a surface opposite to the first surface of the transported member.
A printing apparatus comprising the second drying apparatus composed of the drying apparatus according to any one of claims 1 to 16 , which is arranged on the downstream side in the transport direction of the second liquid applying means. ..

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