JP2018066552A - Dryer and printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve drying efficiency while reducing cockling.SOLUTION: A drying device 104 is provided with contact heating means 10 for contacting the surface of continuous paper 110 on the side opposite to the surface to which the liquid is applied to heat the continuous paper 110. The contact heating means 10 includes a plurality of heating rollers 11A to 11E which are a plurality of second heating members having a curved contact surface 11a to be in contact with the continuous paper 110, and a heating drum 12 which is a first heating member having a curved contact surface 12a to be in contact with the continuous paper 110 as well. The contact distance of the continuous paper 110 with respect to the heating drum 12 is longer than the contact distance of the continuous paper 110 with respect to the heating roller 11.SELECTED DRAWING: Figure 2

Description

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

  As a printing apparatus that performs printing by applying a liquid to continuous paper or the like, there is an apparatus that promotes drying of the applied liquid and reduces cockling (swelling due to swelling) of the continuous paper.

  For example, a heating roller that conveys a substrate along a conveyance path on the outer circumferential surface by rotating the substrate to which the liquid is applied is wound around the outer circumferential surface and heating the substrate. In some cases, a plurality of guide rollers having a smaller diameter than the heating roller that guides the substrate are arranged (Patent Document 1).

JP 2014-152964 A

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

  The present invention has been made in view of the above-described problems, and aims to reduce cockling and perform efficient drying.

In order to solve the above problems, a drying apparatus according to the present invention includes:
An apparatus for drying a member to which liquid is applied and transported,
Contact heating means for heating the member to be transported in contact with the member to be transported,
The contact heating means includes a plurality of heating members having a curved contact surface in contact with the conveyed member,
Of the heating members that are in contact with the surface opposite to the liquid application surface of the transported member, the heating member with the maximum contact distance is defined as the first heating member, which is upstream of the first heating member in the transport direction. When the heating member is the second heating member,
Any of the heating members that are in contact with the conveyed member one before and two before the first heating member are the second heating members.
The configuration.

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

1 is a schematic explanatory diagram of a printing apparatus according to a first embodiment of the present invention. It is expansion explanatory drawing of the drying apparatus in the said 1st Embodiment. It is explanatory drawing with which it uses for description of the winding angle to a heating roller and a heating drum. It is expansion explanatory drawing of the drying apparatus in 2nd Embodiment of this invention. It is expansion explanatory drawing of the drying apparatus in 3rd Embodiment of this invention. It is expansion explanatory drawing of the drying apparatus in 4th Embodiment of this invention. It is expansion explanatory drawing of the drying apparatus in 5th Embodiment of this invention. It is expansion explanatory drawing of the drying apparatus in 6th Embodiment of this invention. It is expansion explanatory drawing 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 expansion explanatory drawing of the drying apparatus in 8th Embodiment of this invention. It is expansion explanatory drawing of the drying apparatus in 9th Embodiment of this invention. It is expansion explanatory drawing of the drying apparatus in 10th Embodiment of this invention. It is expansion explanatory drawing of the drying apparatus in 11th Embodiment of this invention. It is explanatory drawing with which it uses for description of arrangement | positioning of the temperature sensor in the same embodiment. It is a block diagram of the part which concerns on the temperature control of the 1st infrared heating means and the 2nd heating member in the embodiment. It is a schematic explanatory drawing of the printing apparatus which concerns on 12th Embodiment of this invention.

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

  This printing apparatus is an ink jet recording apparatus, and includes a liquid application unit 101 including a liquid discharge head that is a liquid application unit that discharges and applies ink, which is a liquid of a predetermined color, to the continuous paper 110 that is a conveyed member. have.

  In the liquid application unit 101, for example, full-line heads 111A, 111B, 111C, and 111D for four colors are arranged from the upstream side in the transport direction of the continuous paper 110. Each head 111 applies black K, cyan C, magenta M, and yellow Y liquid to the continuous paper 110, respectively. The type and number 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 disposed facing the liquid application unit 101, and guided by the transport guide member 113. Are transported (moved).

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

  Next, the drying apparatus in 1st Embodiment is demonstrated with reference to FIG.2 and FIG.3. FIG. 2 is an enlarged explanatory view of the drying device, and FIG. 3 is an explanatory view for explaining a winding angle around the heating roller and the heating drum.

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

  The contact heating means 10 has heating rollers 11 </ b> A to 11 </ b> E that are a plurality of heating members having a curved contact surface 11 a that contacts the continuous paper 110, and a curved contact surface 12 a that also contacts 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 a maximum contact distance among heating members that are in contact with the surface opposite to the liquid application surface of the continuous paper 110 that is a conveyed member. Downstream heating member). The heating rollers 11 </ b> A to 11 </ b> E are heating members that are upstream of the first heating member in the conveyance direction among the heating members that are in contact with the surface opposite to the liquid application surface of the continuous paper 110 that is a conveyed member. As 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 11 </ b> A to 11 </ b> E (hereinafter referred to as “heating roller 11” when not distinguished) and the heating drum 12 are arranged in an arc along the conveyance direction of the continuous paper 110.

  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 conveyance path is configured to be long. The “contact distance” is a distance at which the continuous paper 110 is in contact with the circumferential surface in the direction along the circumferential direction of the heating drum 12 and the heating roller 11 (conveying direction). When the heating member is a curved surface member (curved surface heater 21 described later) having a curved surface as a contact surface, the distance is in contact with the curved surface in the direction along the circumferential direction of the curved surface (conveying direction).

  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 “winding angle θ”) end the contact with the point Ps where the continuous paper 110 starts to contact the contact surfaces 12a and 11a. This means the angle formed by the point Pe to the center O.

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

  In this embodiment, since 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, in any case, the contact surface 12a of the heating drum 12 and the continuous paper 110 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 when the winding angle θ is the same, the contact distance increases as the diameter of the rotating body increases. Therefore, even if the heating drum 12 and the heating roller 11 have the same diameter and the winding angle θ2 is made larger than θ1, the contact distance L2 between the contact surface 12a of the heating drum 12 and the continuous paper 110 becomes the contact of the heating roller 11. The contact distance L1 between the surface 11a and the continuous paper 110 is longer.

  By comprising in this way, 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 application, the back surface side of the continuous paper 110 has a wide range (long contact distance). It is difficult to adhere to the surface (contact surface).

  Therefore, in the initial state where the applied liquid has not been dried, the contact angle is shortened by decreasing the winding angle θ of the continuous paper 110 around the heating roller 11.

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

  As a result, the continuous paper 110 that has been cocked and dried is able to be brought into close contact with the contact surface even if the contact distance with the rotating body is increased.

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

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

  In addition, by increasing the number of heating rollers 11 to be contacted to increase the amount of drying heat, even a continuous body having a large thickness can increase the drying speed and ensure high productivity.

  In the present embodiment, a part of the guide rollers 17C to 17I may be a heating roller (heating member). Further, a blower such as a blower fan that blows air on the continuous paper 110 in the region of the contact heating means 10 can be provided.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an enlarged explanatory view of the drying apparatus in the 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 includes five heating rollers 11 (11 </ b> A to 11 </ b> E) constituting the contact heating means 10 and a heating drum 12. Further, an upstream side guide roller 17A of the contact heating means 10 and downstream side guide rollers 17B to 17F are provided.

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

  If comprised in this way, the contact distance which the continuous paper 110 contacts the contact surface of the heating drum 12 becomes longer than the said 1st Embodiment, and drying efficiency improves more.

  Next, a 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 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 includes seven heating rollers 11 (11 </ b> A to 11 </ b> G) constituting the contact heating means 10 and a heating drum 12. Further, guide rollers 17A to 17I are provided.

  Here, in the contact heating means 10, seven heating rollers 11 (11 </ b> A to 11 </ b> G) are arranged around the heating drum 12 in an arc shape. Here, the distance from the center of the heating drum 12 to the center of each heating roller 11 is the same, but the center of the heating drum 12 coincides with the center of the arc of the heating roller 11 arranged in an arc shape. do not have to.

  Thereby, when it conveys in contact over the some heating roller 11, a load is not applied to the continuous paper 110, and it can convey with appropriate tension | tensile_strength.

  And the continuous paper 110 guided to the contact heating means 10 by the guide roller 17D is in contact with the outer surface (side away from the center side of the arc) of the heating rollers 11A to 11G, and the peripheral surface of the heating drum 12 Thus, after contacting the peripheral surface of the heating drum 12 within a range of a wrapping angle of approximately 90 °, a conveyance path is formed that is guided downstream of the contact heating means 10 by the guide roller 17E.

  Accordingly, the winding angle of the continuous paper 110 with respect to the heating drum 12 is larger than the winding angle of the continuous paper 110 with respect to the heating roller 11, and the contact distance of the continuous paper 110 with respect to the heating drum 12 is longer than the contact distance with respect to the heating roller 11.

  Moreover, in this embodiment, the hot air apparatuses 19A-19G as non-contact heating means are arrange | positioned facing heating roller 11A-11G.

  By comprising in this way, the drying rate can be raised by increasing the number of the heating rollers 11, suppressing the enlargement of an 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 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 includes ten heating rollers 11 (11A to 11J), a heating drum 12, and a pressing roller 13 (13A to 13J) that presses the continuous paper 110 against the heating roller 11 (11A to 11J) that constitute the contact heating unit. It has.

  Further, guide rollers 17 </ b> A to 17 </ b> D for guiding the continuous paper 110 to the contact heating means 10 and a guide roller 17 </ b> E for winding the continuous paper 110 around the heating drum 12 are provided. Furthermore, heating rollers 14A and 14B that also serve as guide rollers for guiding the continuous paper 110 coming out from the contact heating means 10 are provided.

  In the contact heating means 10, ten heating rollers 11 (11 </ b> A to 11 </ b> J) are arranged around the heating drum 12 in an arc shape. Here, ten heating rollers 11 (11 </ b> A to 11 </ b> J) are arranged so as to surround the heating drum 12.

  In addition, let the heating drum 12 side be an inner side area | region among the surrounding surfaces of the heating roller 11, and let the opposite side to the heating drum 12 be an outer side area | region. In this case, since the heating roller 11 rotates, the peripheral surface portions that become 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 being in contact with the portion of the outer area of the peripheral surface of the heating rollers 11A to 11J. It reaches the peripheral surface of the heating drum 12. Then, after substantially contacting the entire circumference of the heating drum 12 and passing through the heating drum 12, it is guided again to the heating roller 11J by the guide roller 17E.

  The continuous paper 110 guided to the heating roller 11J is pressed by the pressing rollers 13A to 13J to the portion of the inner region of the peripheral surface of the heating rollers 11J to 11A, and is in a second state different from the first direction. It is conveyed in the Y2 direction, which is the direction, and guided downstream of the contact heating means 10.

  That is, the conveyance path in which the continuous paper 110 is conveyed while being in contact with 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 that is transported and a second path that is transported in the second direction (Y2 direction) while re-contacting the plurality of heating rollers 11J to 11A that are in contact with each other in the first path.

  Thereby, while suppressing the enlargement of the apparatus, the number of the heating rollers 11 is increased to increase the drying speed, and the contact surface (circumferential surface) of the heating roller 11 is simultaneously contacted twice at different positions. The drying rate is further improved.

  In this way, the members simultaneously conveyed to two different places on the same heating member (heating roller) are brought into contact with each other and heated.

  Thereby, the member conveyed efficiently with few heating members can be dried.

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

  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 is similarly replaced with the heating drum 12. The curved surface heating member 22 having a curved contact surface is provided.

  Even if comprised in this way, the effect similar to the said 1st Embodiment can be acquired.

  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 heatings that become a portion corresponding to the outer region and a portion corresponding to the inner region of the peripheral surface of the heating roller 11 The member 21 may be disposed.

  Next, a 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 embodiment.

  In the present embodiment, infrared heaters 31 </ b> A to 31 </ b> C that are first infrared heating means are disposed on the upstream side of the heating roller 11 that is a plurality of second heating members, at the inlet portion of the drying device 104.

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

  Thereby, the water | moisture content of a liquid can be evaporated at an early stage.

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

  Thereby, the liquid solvent can be evaporated.

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

  Thus, the effect which maintains the temperature rising effect of continuous paper can be show | played by arrange | positioning an infrared heater between adjacent contact-type heating members.

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

  In the present embodiment, at the inlet portion of the drying device 104, the upstream side of the heating roller 11 that is a plurality of second heating members, a region where the heating rollers 11 that are a plurality of second heating members are disposed (the heating roller 11 and 3rd infrared heating means 33 (33A-33J) is arrange | positioned in each (including between the heating drums 12).

  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 where 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 weak continuous paper, 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 an infrared absorption band of water. Therefore, even the moisture contained in the medium is heated. Therefore, contraction occurs in the portion of the medium to which no liquid is applied (white paper portion), and cockling occurs.

  Therefore, in the present embodiment, a medium with weak stiffness is obtained by evaporating the solvent component of the portion to which the liquid is applied (printing portion) and heating only the printing portion while suppressing the heating of moisture in the medium. 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 that is an infrared irradiation means are passed through an infrared filter 35 that blocks specific wavelengths. This can be done by removing infrared light having 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 can also be constituted by an infrared irradiation means that generates infrared rays having a wavelength in a specific band.

  Next, an 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 embodiment.

  In the present embodiment, in the first embodiment (may be the second to fifth embodiments), the radiant heating means 36A to 36E configured by an infrared lamp, a halogen lamp, or the like facing the heating roller 11 portion. Is arranged. Note that, as in the sixth embodiment, the heating rollers 11 may be disposed to face each other.

  Here, the two radiant heating means 36 adjacent in the transport direction are connected to the downstream radiant heating means 36 and the continuous form with respect to the distance G between the upstream radiant heating means 36 and the continuous paper 110 (heating roller 11). The gap G with the paper 110 (heating roller 11) is increased.

  Specifically, the gap G is sequentially arranged from the most upstream side radiation heating means 36A toward the downstream side radiation heating means 36E. If the amount of heat is the same, the amount of heat given to the continuous paper 110 decreases as the interval G increases.

  As a result, the amount of heat can be changed according to the degree of penetration of the liquid into the continuous paper 110 while keeping the amount of heat of the plurality of radiation 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 embodiment.

  Also in the present embodiment, in the first embodiment (may be the second to fifth embodiments), the radiant heating means 36A to 36E are arranged to face the heating roller 11 portion. Note that, as in the sixth embodiment, the heating rollers 11 may be disposed to face each other.

  Here, the two radiant heating means 36 adjacent in the transport direction are more sensitive to the continuous paper 110 of the radiant heating means 36 on the downstream side than the inclination θ of the radiant direction of the radiant heating means 36 to the continuous paper 110 of the upstream side. The inclination θ in the radiation direction is increased. The inclination θ is the inclination of the energy emission surface of the radiant heating means 36 with respect to the normal on the surface of the continuous paper 110. Increasing the inclination θ means that the energy method slope does not face the continuous paper 110. is there.

  Specifically, the gradient θ in the radiation direction is sequentially increased from the most upstream radiation heating means 36A toward the downstream radiation heating means 36E. 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 of penetration of the liquid into the continuous paper 110 while keeping the amount of heat of the plurality of radiation heating means 36 the same.

  Next, a 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 embodiment.

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

  Thereby, the amount of heat applied to the continuous paper 110 can be changed by changing the position of each radiation heating means 36, and the arrangement can be made such that the interval G changes as in the eighth embodiment. It is.

  In this case, a plurality of radiant heating means 36 can be arranged so as to be swingable so that the inclination of the radiating direction with respect to the continuous paper 110 can be changed as in the ninth embodiment.

  Next, an 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 embodiment.

  The drying device 104 includes pressing rollers 13 (13A to 13E) that press 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. ).

  Further, a guide roller 17A for guiding the continuous paper 110 to the heating roller 11A, a guide roller 17F for winding the continuous paper 110 around the heating drum 12, and a continuous paper 110 drawn out in contact with the heating roller 11A for the second time. Are provided with guide rollers 17B to 17E.

  Also in this embodiment, as in the fourth embodiment, the continuous paper 110 is conveyed while contacting the plurality of heating rollers 11A to 11F, and the continuous paper 110 passes to the plurality of heating rollers 11A to 11F. The first path conveyed while contacting and the plurality of heating rollers 11J to 11F that are contacted in the first path are guided by the contact guide rollers 13A to 13E and conveyed in the second direction while contacting again. Route.

  In the present embodiment, infrared heaters 31 </ b> A to 31 </ b> E that are first infrared heating means are arranged between the heating rollers 11. In addition, infrared heaters 31F to 31H, which are 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 transported continuous paper 110 with infrared light having a maximum wavelength within the water absorption wavelength band. Here, the infrared heater 31 irradiates infrared rays having a maximum wavelength in a band of 2 to 6 μm.

  Next, 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 for explaining the arrangement of the temperature sensor, and FIG. 16 is a block diagram of a portion relating to temperature control of the first infrared heating means and the second heating means.

  On the downstream side of the infrared heater 31 that is the first infrared heating means, a temperature sensor 41 (41A to 41E) that is a temperature detection means for detecting the temperature of the continuous paper 110 is disposed. In FIG. 16, the infrared heater 31 is described as “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 detected temperature obtained from the detection signal of the temperature sensor 41. In addition, the structure which controls the temperature of either the infrared heater 31 or the heating roller 11 may be sufficient.

  The infrared heater 31 decreases the temperature of the heat source by lowering the input voltage (applied voltage), and the maximum wavelength of the irradiated infrared rays 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. On the other hand, if the temperature of the member to which the liquid is applied is raised too much, damage such as blistering and yellowing will occur. Since it may occur, it is necessary to control to 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 to 150 ° C., the control unit 50 detects the continuous detected by the temperature sensor 41 on the downstream side of the infrared heater 31. When the detected temperature of the book 110 is 100 ° C. or lower, control is performed to increase the applied power so that infrared light having a maximum wavelength of 2 μm is irradiated, and the temperature is raised by increasing the applied power to the heating roller 11.

  Further, when the detected temperature is 150 ° C. or higher, control is performed to lower the applied power so as to irradiate infrared light having a maximum wavelength of 3 to 8 μm, for example, so that the maximum wavelength of the infrared heater is increased, and the heating roller 11 is controlled. Control to lower the temperature by lowering the applied power.

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

  Thus, since the temperature of the member to which the liquid is applied can be quickly controlled by controlling the applied power to the first infrared heating means and the second heating member, the conveyance speed of the conveyed member is increased. Productivity can be improved.

  In addition, although the example which controls the heating temperature of a 1st infrared heating means and a 2nd heating member is demonstrated here, the heating temperature of at least any one of the heating temperature of a 1st infrared heating means and a 2nd heating member is set. It can also be configured to control. Similarly, in the configuration in which the second infrared heating means is disposed, the heating temperature of at least one of the second infrared heating means and the second heating member can be controlled.

  Next, a printing apparatus according to a twelfth embodiment of the present invention is described with reference to FIG. FIG. 17 is a schematic explanatory diagram of the printing apparatus.

  This printing apparatus includes a first printing unit 1001 that prints on one side of the continuous paper 110 between the original winding roller 102 and the winding roller 105, and a continuous printing that is printed on one side by the first printing unit 1001. A reversing unit 1003 for reversing the front and back of the booklet 110 and a second printing unit 1002 for printing on the other side of the continuous paper 110 and drying are arranged.

  The configurations of the liquid application 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 (or may be the same as) the first embodiment, but the second to second units. It can be the same as or substantially the same as the eleventh embodiment.

  Here, the liquid application unit 101 of the first printing unit 1001 serves as a first liquid application unit that applies liquid to the first surface of the continuous paper 110 that is a conveyed member. The liquid application unit 101 of the second printing unit 1002 serves as a second liquid application unit that applies liquid to the second surface opposite to the first surface of the continuous paper 110 that is a conveyed member.

  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 is in 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 is in contact with the heating roller 11.

  In each said embodiment, although the member conveyed is demonstrated in the example which is a continuous paper, it is not restricted to this, It will not specifically limit if it is a member conveyed by the drying apparatus which concerns on this invention. For example, in addition to a continuous material such as continuous paper, roll paper, and web, and a recording medium (printed material) such as a long sheet material, a printed material such as a sheet for an electronic circuit board such as wallpaper or prepreg may be used.

  In addition to recording images such as letters and figures with a liquid such as ink, an image having no meaning such as a pattern is printed on a member conveyed by the printing apparatus for the purpose of decoration or decoration. Or a liquid such as

  In the present application, the liquid to be applied is not particularly limited, but is preferably a liquid having a viscosity of 30 mPa · s or less at room temperature, normal pressure, or by heating and cooling. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, functional materials such as polymerizable compounds, resins, and surfactants, and biocompatible materials such as DNA, amino acids, proteins, and calcium. , Edible materials such as natural pigments, solutions, suspensions, emulsions, and the like. These include, for example, inkjet inks, surface treatment liquids, components of electronic devices and light emitting devices, and formation of electronic circuit resist patterns. It can be used in applications such as liquids for use, three-dimensional modeling material liquids, and the like.

  When a liquid discharge head is used as the liquid application means, a thermal actuator using an electrothermal transducer such as a piezoelectric actuator (laminated piezoelectric element and thin film piezoelectric element), a heating resistor as an energy generating source for discharging liquid, vibration 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 11J Heating roller (second heating member)
12 Heating drum (first heating member)
13A to 13J Pressing roller 17A to 17I Guide roller 31A to 31C Infrared heater (first infrared heating means)
32A to 32G Infrared heater (second infrared heating means)
33A to 33J Third infrared heating means 34 Infrared heater 35 Infrared filter 36A to 36E Radiation heating means 101 Liquid application section 103 Conveying section 104 Drying device 110 Continuous paper (conveyed member)

Claims (20)

An apparatus for drying a member to which liquid is applied and transported,
Contact heating means for heating the member to be transported in contact with the member to be transported,
The contact heating means includes a plurality of heating members having a curved contact surface in contact with the conveyed member,
Of the heating members that are in contact with the surface opposite to the liquid application surface of the transported member, the heating member with the maximum contact distance is defined as the first heating member, which is upstream of the first heating member in the transport direction. When the heating member is the second heating member,
Any of the heating members that are in contact with the conveyed member one before and two before the first heating member are the second heating members.
A drying apparatus characterized by that. The heating member 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. Drying equipment. The drying apparatus according to claim 1, wherein the second heating member and the first heating member are arranged in an arc shape. The apparatus for drying according to claim 1, wherein the second heating member is disposed so as to surround the first heating member. 3. The drying apparatus according to claim 1, wherein the second heating member is arranged in an arc shape or an arc shape around the first heating member. 4. 6. The drying apparatus according to claim 1, further comprising a non-contact heating unit that heats the conveyed member in a non-contact manner. A transport path in which the transported member is transported while being in contact with the second heating member,
A first path in which the transported member is transported while being in contact with the second heating member, and a second path in which the transported member is transported while being again in contact with at least one second heating member that has been in contact with the first path And a drying apparatus according to any one of claims 1 to 6. The drying apparatus according to claim 1, wherein a first infrared heating means for irradiating infrared light having a maximum wavelength within a water absorption wavelength band is disposed upstream of the second heating member. The second infrared heating means for irradiating infrared light having a maximum wavelength within the absorption wavelength band of the solvent contained in the liquid is disposed in a region where the second heating member is disposed. The drying apparatus according to 1. First infrared heating means for irradiating the conveyed member with infrared light having a maximum wavelength within the absorption wavelength band of water;
Temperature detecting means for detecting the temperature of the surface of the conveyed member;
2. The apparatus according to claim 1, further comprising: means for controlling a heating temperature of at least one of the first infrared heating unit and the second heating member based on a temperature detected by the temperature detection unit. Drying equipment. 11. The drying apparatus according to claim 9, wherein the second infrared heating means irradiates infrared rays having a maximum wavelength in a band of 3 to 8 μm. The drying apparatus according to claim 9 or 10, wherein the second infrared heating means is arranged between the adjacent second heating members. A third infrared heating means for irradiating the conveyed member with infrared rays;
The said 3rd infrared heating means irradiates the infrared rays which have the maximum wavelength within the absorption wavelength band of the solvent contained in the said liquid except the maximum wavelength in which water absorbs infrared rays. Drying equipment. The third infrared heating means includes
Infrared irradiation means for irradiating infrared rays;
14. The drying apparatus according to claim 13, further comprising: a filter that absorbs a component having a maximum wavelength that absorbs infrared rays among infrared rays irradiated from the infrared irradiation unit. At least two radiant heating means for heating the member to be conveyed along the conveying direction are arranged;
The drying apparatus according to claim 1, wherein the two radiant heating units have different intervals from the conveyed member. The drying apparatus according to claim 15, wherein an interval between the radiant heating unit on the downstream side and the conveyed member is wider than an interval between the radiant heating unit on the upstream side and the conveyed member. . At least two radiant heating means for heating the member to be conveyed along the conveying direction are arranged;
The inclination of the radiation direction with respect to the conveyed member of the radiant heating means on the downstream side is larger than the inclination of the radiation direction with respect to the conveyed member of the radiant heating means on the upstream side. The drying apparatus as described. Radiation heating means for heating the member to be conveyed along the conveyance direction,
2. The radiant heating means can change a distance from the conveyed member, or can change an inclination of a radiating direction with respect to the conveyed member. The drying apparatus described in 1. A liquid applying means for applying a liquid to a member to be conveyed;
A printing apparatus comprising: the drying apparatus according to claim 1. First liquid applying means for applying a liquid to the first surface of the conveyed member;
A first drying device configured by the drying device according to any one of claims 1 to 18, which is disposed on the downstream side in the transport direction of the first liquid application unit;
A second liquid applying means disposed on the downstream side in the transport direction of the first drying device, for applying a liquid to a second surface which is a surface opposite to the first surface of the transported member;
A second drying device configured by the drying device according to any one of claims 1 to 18, which is disposed on the downstream side in the transport direction of the second liquid application unit. .

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