JP2022166456A - Conveyance device, heating device, device for discharging liquid, and printer - Google Patents

Abstract

To provide a device for performing stable adsorption and conveyance of a sheet material.SOLUTION: A conveyance belt 501 for conveying a sheet material P has a plurality of adsorption surfaces (adsorption areas) 511 (511a to 511c) of different kinds, wherein the adsorption surface 511a is a mesh bel part where linear members 512 are arranged in a mesh-like state and openings 513 for suction are formed, the adsorption surface 511b is a flat belt part where suction holes 515 as a plurality of openings for suction are formed in a flat belt 514, the adsorption surface 511c is a mesh belt part where the linear members 512 are arranged in a mesh-like state and the openings 513 for suction are formed, and the adsorption surface 511a and the adsorption surface 511c have different widths (adsorption surface widths) in a direction orthogonal to a sheet material conveyance direction.SELECTED DRAWING: Figure 5

Description

The present invention relates to a conveying device, a heating device, a device for ejecting liquid, and a printing device.

2. Description of the Related Art As a printing apparatus that applies a liquid to a printing target such as a sheet material to perform printing, there is a type that heats the sheet material to which the liquid is applied by a heating means while conveying the sheet material by being attracted to a conveying belt.

Conventionally, the sheet materials are supported by a mesh belt in which linear members are arranged in a mesh pattern, a flat belt in which a plurality of suction holes (through holes) are formed, and a plurality of supporting wires as a conveyor belt that adsorbs and conveys the sheet material. It is known to use a thing etc. (patent document 1).

Japanese Patent Application Laid-Open No. 2021-035761

By the way, in a conveying device that conveys different types of sheet materials, the size of the sheet materials to be conveyed is too small with respect to the adsorption area, and the required adsorption force cannot be obtained. There is a problem that it is not possible to

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to enable stable adsorption and transportation.

In order to solve the above problems, the conveying device according to the present invention includes:
Equipped with a conveyor belt that adsorbs and conveys the sheet material,
The conveying belt is configured to have suction surfaces of different types.

According to the present invention, stable suction transport can be performed.

1 is a schematic explanatory diagram of a printing device as a device for ejecting liquid according to a first embodiment of the present invention; FIG. It is a plane explanatory view of the discharge unit of the same printing apparatus. It is an explanatory view around a drum of the printing unit of the same printing apparatus. It is an explanatory view of a heating device concerning a 1st embodiment of the present invention. FIG. 2 is a perspective explanatory view of a conveying belt of the conveying device according to the first embodiment of the present invention; It is similarly a plane explanatory view. FIG. 10 is an explanatory diagram similarly used for explaining each attraction surface; FIG. 4 is a cross-sectional explanatory view in a direction orthogonal to the sheet material conveying direction of the present embodiment for explaining the relationship between the size of the sheet material and the suction area; FIG. 11 is a cross-sectional explanatory view of a direction perpendicular to the sheet material conveying direction of Comparative Example 1; FIG. 5 is an explanatory diagram for explaining an example of the relationship between the attracting surface of the conveying belt, the heating method, and the thickness of the sheet material; FIG. 3 is a plan view of a conveying belt for explaining an example of an attracting surface detecting means for detecting the type of attracting surface of the conveying belt; It is cross-sectional explanatory drawing of the direction orthogonal to a conveyance direction similarly. FIG. 4 is an explanatory diagram of sensor output of an attraction surface detection output stage; FIG. 4 is an explanatory diagram for explaining a first example of thickness detection means for detecting the thickness of a sheet material; FIG. 11 is an explanatory diagram similarly used for explaining a second example of the thickness detection means; FIG. 4 is a perspective explanatory view for explaining an example of size detection means for detecting the size of a sheet material; FIG. 4 is a block explanatory diagram of a portion related to heating control and transport control of a drying section; FIG. 2 is an explanatory diagram of an example of an operation panel including input means for explaining an example of input means;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. A printing apparatus as an apparatus for ejecting liquid according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is a schematic explanatory diagram of the same printing apparatus, FIG. 2 is a plan explanatory diagram of an ejection unit of the same printing apparatus, and FIG. 3 is an explanatory diagram around a drum of a printing section of the same printing apparatus.

The printing apparatus 1 includes a loading section 10 that loads the sheet material P, a preprocessing section 20 that is a coating section, a printing section 30, a drying section 40, a reversing mechanism section 60, and an unloading section 70. .

In the printing apparatus 1, the pretreatment unit 20 applies (applies) a pretreatment liquid as a coating liquid to the sheet material P carried in (supplied) from the carry-in unit 10 as necessary, and the printing unit 30 applies (applies) the sheet material. A required liquid is applied to P to perform required printing.

After drying the liquid adhering to the sheet material P in the drying unit 40 , the printing apparatus 1 prints the sheet material P directly or after printing on both sides of the sheet material P via the reversing mechanism unit 60 . P is discharged to the unloading section 70 .

The carry-in unit 10 includes a carry-in tray 11 (a lower carry-in tray 11A and an upper carry-in tray 11B) that accommodates a plurality of sheet materials P, and a feeding device 12 (12A) that separates and feeds out the sheet materials P one by one from the carry-in tray 11. , 12B) to supply the sheet material P to the pre-processing section 20 .

The pretreatment unit 20 includes, for example, a coating unit 21 which is a treatment liquid applying unit for applying a treatment liquid having an effect of aggregating ink and preventing show-through to the printing surface of the sheet material P.

The printing unit 30 includes a drum 31 that is a supporting member (rotating member) that supports the sheet material P on its peripheral surface and rotates, and a liquid ejection unit 32 that ejects liquid toward the sheet material P supported on the drum 31 . I have.

The printing unit 30 includes a transfer drum 34 that receives the sheet material P fed from the preprocessing unit 20 and transfers the sheet material P between it and the drum 31, and a first drying unit that receives the sheet material P conveyed by the drum 31. A delivery cylinder 35 for delivery to the unit 41 is provided.

The sheet material P transported from the preprocessing unit 20 to the printing unit 30 is gripped at its leading end by gripping means (sheet gripper) provided on the transfer cylinder 34 and transported as the transfer cylinder 34 rotates. The sheet material P conveyed by the transfer drum 34 is transferred to the drum 31 at a position facing the drum 31 .

Gripping means (sheet gripper) is also provided on the surface of the drum 31, and the leading end of the sheet material P is gripped by the gripping means (sheet gripper). A plurality of suction holes are dispersedly formed on the surface of the drum 31 , and a suction means generates an inward suction air flow from the required suction holes of the drum 31 .

Then, the sheet material P transferred from the transfer drum 34 to the drum 31 is gripped by the sheet gripper at the leading end, is sucked and carried on the drum 31 by the air current sucked by the suction means, and is conveyed as the drum 31 rotates. be done.

The liquid ejection section 32 includes ejection units 33 (33A to 33E) that are liquid ejection means as liquid applying means. For example, the ejection unit 33A uses cyan (C) liquid, the ejection unit 33B uses magenta (M) liquid, the ejection unit 33C uses yellow (Y) liquid, and the ejection unit 33D uses black (K) liquid. Dispense each. Further, the ejection unit 33E ejects special liquid such as white and gold (silver).

The ejection unit 33 includes, for example, as shown in FIG. 2, a plurality of liquid ejection heads (hereinafter simply referred to as “heads”) 101 having a plurality of nozzle rows in which a plurality of nozzles 111 are arranged are arranged on a base member 103 in a zigzag pattern. It has a head array 100 including full-line heads arranged in a row. It also has a sub-tank (liquid storage container) for storing the liquid to be supplied to each head 101 of the head array 100 .

The ejection operation of each ejection unit 33 of the liquid ejection section 32 is controlled by a drive signal corresponding to print information. When the sheet material P carried by the drum 31 passes through the area facing the liquid ejection section 32, the liquid of each color is ejected from the ejection unit 33, and an image corresponding to the print information is printed.

Further, as shown in FIG. 3, a plurality of (here, three) ejection receivers 300 are arranged on the drum 31 at substantially equal angles. When the head 101 of the ejection unit 33 is maintained and recovered, an idle ejection operation for ejecting liquid (idle ejection droplets) that is not applied to the sheet material P is performed on the ejection receiver 300 . The discharge receiver 300 also receives liquid that protrudes from the sheet material P when borderless printing is performed.

Further, a thickness detection means 831 for detecting the thickness of the sheet material P is arranged on the upstream side of the most upstream discharge unit 33A.

The drying section 40 is a heating device according to the present invention, and includes a first drying section 41 and a second drying section 42 .

The first drying section 41 includes a heat irradiating section 402 as heating means such as an IR heater, and irradiates infrared rays to the sheet material P to which the liquid is applied and which is conveyed by the conveying device 500 to heat and dry the sheet material.

The second drying section 42 includes an ultraviolet irradiation section 403 as a heating means, and irradiates the sheet material P to which the liquid is applied, which passes through the first drying section 41 and is conveyed by the conveying device 500, with ultraviolet rays to heat and dry. do.

The reversing mechanism unit 60 is a reversing unit 61 that reverses the sheet material P by a switchback method when double-sided printing is performed on the sheet material P that has passed through the drying unit 40 and has been applied with liquid on one side and dried. and a double-sided conveying section 62 that feeds the reversed sheet material P backward to the upstream side of the transfer cylinder 34 of the printing section 30. - 特許庁

The carry-out section 70 includes a carry-out tray 71 on which a plurality of sheet materials P are stacked. The sheet materials P conveyed from the reversing mechanism section 60 are sequentially stacked and held on the carry-out tray 71 .

In this embodiment, an example in which the sheet material is a cut sheet material is described, but an apparatus using a continuous body (web) such as continuous paper and roll paper, and an apparatus using a sheet material such as wallpaper. The present invention can also be applied to such as.

Next, a heating device according to a first embodiment of the invention will be described with reference to FIG. FIG. 4 is an explanatory side view of the same heating device.

The heating device 400 has a conveying device 500 according to the present invention, a heat irradiation section 402 and an ultraviolet irradiation section 403 . A drying unit 40 is configured by the heating device 400 .

The conveying device 500 has a conveying belt 501 that carries and conveys the sheet material P. As shown in FIG. The conveying belt 501 is entrained between a driving roller 502 and a driven roller 503 to move in a circular motion. Note that, in the present embodiment, the conveying device 500 is a mechanism that conveys the sheet material P across the printing unit 30 and the reversing mechanism unit 60, as shown in FIG.

The transport belt 501 is, for example, a belt member having a plurality of openings (suction openings) that are sucked by a suction chamber 504 arranged inside. The suction chamber 504 performs suction with a suction blower, fan, or the like.

In the heat irradiation section 402, a plurality of heat irradiation means 421 composed of IR heaters are arranged in a housing 420 along the conveying direction. The heat irradiation means 421 irradiates the sheet material P conveyed by the conveying device 500 with infrared rays as thermal energy to heat the sheet material P. As shown in FIG. The heat irradiation unit 402 includes temperature detection means 422 for detecting the temperature of the heat irradiation means 421 .

The ultraviolet irradiation unit 403 has a housing 430 in which a plurality of ultraviolet irradiation means 431 are arranged along the conveying direction. The ultraviolet irradiation means 431 irradiates the sheet material P conveyed by the conveying device 500 with ultraviolet rays to heat it.

In this way, in the conveying direction of the sheet material P, the heat irradiation unit 421 is arranged on the upstream side, and the ultraviolet irradiation unit 431 is arranged on the downstream side.

Further, sheet material presence/absence detection means 832 ((832A 832C) are arranged.

Next, the conveying belt of the conveying device according to the first embodiment of the present invention will be described with reference to FIGS. 5 to 7. FIG. 5 is an explanatory perspective view of the conveyor belt, FIG. 6 is an explanatory plan view of the same, and FIG. 7 is an explanatory view for explaining each attraction surface.

The transport belt 501 has a plurality of adsorption surfaces (suction areas) 511 (511a to 511c) of different types. As shown in FIG. 7(a), the suction surface 511a is a mesh belt portion having suction openings 513 formed by arranging linear members 512 in a mesh pattern. As shown in FIG. 7B, the suction surface 511b is a flat belt portion in which suction holes 515, which are suction openings 513, are formed in a flat belt 514. As shown in FIG. As shown in FIG. 7A, the suction surface 511c is a mesh belt portion having suction openings 513 formed by arranging linear members 512 in a mesh pattern.

Here, the suction surfaces 511a and 511c and the suction surface 511b differ in the number of suction openings 513 and suction holes 515 per unit area. Also, the suction surfaces 511a and 511c and the suction surface 511b have different opening areas of the suction openings 513 and the suction holes 515 that are the suction openings.

The attracting surface 511a and the attracting surface 511c have different widths (attracting surface widths) in the direction orthogonal to the sheet conveying direction, and as shown in FIG. is narrow (W1>W2). The suction surface 511a and the suction surface 511c are selectively used depending on the size of the sheet material P to be conveyed.

Since the transport belt 501 has different types of suction surfaces 511 in this way, the suction surface 511 to be used can be switched according to the type of the sheet material P to be conveyed, and stable suction and conveyance can be performed. be able to.

That is, when the sheet material P is conveyed by the conveying belt, when a flat belt having suction holes is used, the flat belt having the suction holes has a relatively weaker attracting force than the mesh belt, and the sheet material P is rolled up. Sometimes.

Therefore, by switching between the suction surfaces 511a and 511c or the suction surface 511b of the conveyor belt 501 according to the suction force required for the sheet material P to be conveyed, stable suction conveyance can be performed.

Further, when the size of the sheet material P is smaller than the suction area, priority is given to the suction from the opening for suction opened on the side of the sheet material P, and the suction force is not generated, resulting in insufficient suction or non-suction. Sometimes.

Therefore, by selectively using the attracting surface 511a and the attracting surface 511c according to the size of the sheet material P to be conveyed, the required attracting force can be secured and the sheet material P can be stably attracted and conveyed.

The relationship between the size of the sheet material P and the suction area will be described with reference to FIGS. 8 and 9. FIG. 8 is a cross-sectional explanatory view in a direction orthogonal to the sheet material conveying direction of this embodiment, and FIG. 9 is a cross-sectional explanatory diagram in a direction orthogonal to the sheet material conveying direction of Comparative Example 1. FIG.

The size (width) of the suction area (suction surface 511) of the conveyor belt 501 in the direction orthogonal to the sheet material conveying direction is equal to the maximum width of the sheet material P conveyed by the conveyor belt 501 if the size of the suction area is constant. need to match.

Therefore, in Comparative Example 1 in which the width of the suction surface 511 of the conveying belt 501 is constant, as shown in FIG. The size is such that a sheet material PB2 having a width of B2 can be placed.

Therefore, in Comparative Example 1, as shown in FIG. 9B, when conveying the sheet material PA3, which is smaller than the B2 size, for example, the A3 size, the side suction openings of the sheet material PA3 are opened. As a result, when the chamber 504 performs suction, a large amount of air is sucked from the opened suction openings, so that a sufficient negative pressure is not generated in the chamber 504, causing a problem that the sheet material PA3 cannot be sucked. .

On the other hand, in this embodiment, as shown in FIGS. 8A and 8B, there are a B2 size adsorption surface 511a and an A3 size adsorption surface 511c.

Therefore, when the sheet material P to be conveyed is a B2 size sheet material PB2, as shown in FIG. 8A, the adsorption surface 511a is used to adsorb. When the sheet material P to be conveyed is an A3 size sheet material PA3, as shown in FIG.

In this manner, by selectively using the suction surfaces 511a and 511c according to the size of the sheet material P to be conveyed, a required suction force can be secured and stable suction conveyance can be performed.

Next, an example of the relationship between the attracting surface of the conveying belt, the heating method, and the thickness of the sheet material will be described with reference to FIG. FIG. 10 is an explanatory diagram for the same explanation.

The heating device 400 of this embodiment includes a heat irradiation unit 402 (referred to as IR) and an ultraviolet irradiation unit 403 (referred to as UVLED). The use and the adsorption surface 511 of the conveying belt 501 are switched.

For example, the thinnest (basis weight less than 73 gsm) sheet material P that does not require heating (heating) is adsorbed using the adsorption surface 511a or the adsorption surface 511c, and is heated by the ultraviolet irradiation unit 403 that is less likely to wrinkle. do.

Although heating is required, a medium-thin sheet material P (basis weight of 73 gsm or more and less than 128 gsm), which is easily sucked by suction, is sucked using the sucking surface 511b, and is heated by the ultraviolet irradiation unit 403 where wrinkles are less likely to occur. do.

A medium-thickness sheet material P (basis weight of 128 gsm or more and less than 300 gsm) that does not require heating and does not wrinkle due to heat irradiation is adsorbed using the adsorption surface 511 a or the adsorption surface 511 c and heated by the heat irradiation unit 402 . .

An extremely thick sheet material P (basis weight of 300 gsm or more) that requires heating and is not wrinkled by heat irradiation is sucked using the sucking surface 511 b and heated by the heat irradiation unit 402 .

In this way, various types of sheet material P can be stably adsorbed and conveyed while being dried while suppressing the occurrence of wrinkles.

Next, an example of the attraction surface detection means for detecting the type of attraction surface of the conveying belt will be described with reference to FIGS. 11 to 13. FIG. FIG. 11 is an explanatory plan view of the conveying belt for explaining an example of the attracting surface detecting means, FIG. 12 is an explanatory sectional view in the same direction perpendicular to the conveying direction, and FIG. is.

The suction surface detection means 530 includes detection holes 506 provided in the conveyor belt 501 and a suction surface sensor 531 .

That is, the conveyor belt 501 is provided with different numbers (including “0”) of detection holes 506 in the vicinity of the joint 505 of the attraction surface 511 . For example, one detection hole 506 is provided on the tip side of the sheet material conveying direction of the attracting surface 511c, two detecting holes 506 are provided on the tip side of the sheet material conveying direction of the attracting surface 511b, and the sheet material of the attracting surface 511a is provided. The detection hole 506 is not provided on the leading end side in the conveying direction.

An attraction surface sensor 531 including a light-emitting portion 531a and a light-receiving portion 531b is provided so as to face each other with the detection hole 506 of the conveyor belt 501 interposed therebetween.

With this configuration, the suction surface sensor 531 detects the detection hole 506 or does not detect the detection hole 506 as the conveyor belt 501 revolves, so that, for example, as shown in FIG. A sensor output is obtained.

This sensor output changes from "L" to "H" by the number of detection holes 506 to be detected for each period T of the seam 505 .

Therefore, from the output of the attraction surface sensor 531 near the joint 505, it is possible to detect which of the attraction surfaces 511a to 511c the type of the attraction surface 511 is.

Accordingly, the suction surface 511 to be used can be switched according to the type (size, thickness, etc.) of the sheet material P to be conveyed.

In the above example, when the attraction surface 511a is provided with, for example, three detection holes 506, the sensor output of the attraction surface sensor 531 is as shown in FIG. 13(b).

Next, different examples of the thickness detecting means for detecting the thickness of the sheet material P will be described with reference to FIGS. 14 and 15. FIG. 14 and 15 are explanatory diagrams for explaining the thickness detecting means.

The thickness detection means 831 of the first example shown in FIG. The amount of light received by the light receiving element 831B changes when the sheet material P is thin paper Pa as shown in FIG. 14(a) and when the sheet material P is thick paper Pb as shown in FIG. 14(b). . Thereby, the thickness of the sheet material P can be detected.

The thickness detection means 831 of the second example shown in FIG. 15 includes a projection means 831C for irradiating parallel light Lc parallel to the in-plane direction of the sheet material P, and a CCD light receiving element 831D for receiving the parallel light Lc. there is As shown in FIG. 15A, part of the parallel light Lc is blocked depending on the thickness of the sheet material P, and as shown in FIG. quantity varies. Thereby, the thickness of the sheet material P can be detected.

Next, an example of size detection means for detecting the size of the sheet material P will be described with reference to FIG. FIG. 16 is a perspective explanatory view for explaining an example of the same size detection means.

The size detection means 861 includes a light guide 863 that introduces the light emitted from the light source 862, a lens array 864 that receives the light emitted from the light guide 863, and an image sensor 865 that receives the light that has passed through the lens array 864. I have.

As the sheet material P passes between the lens array 864 of the size detection means 861 and the image sensor 865, the light shielding area changes according to the size (width) of the sheet material P, and the output of the image sensor 865 changes to the size. Varies depending on

Thereby, the size of the sheet material P to be conveyed can be detected.

Next, referring to FIG. 17, the portions related to the heating control and transport control of the drying section will be described. FIG. 17 is a block explanatory diagram of a portion related to the same heating control and transfer control.

The heating control means 801 controls the output of each heat irradiation means 421 of the heat irradiation section 402 and the output control of each ultraviolet irradiation means 431 of the ultraviolet irradiation section 403 .

The storage means 802 stores the relationship information between the thickness of the sheet material P and the heat irradiation unit 402 or the ultraviolet irradiation unit 403 to be used, and the thickness of the sheet material P and the adsorption surface to be used, as described with reference to FIG. 511 is stored. Further, the storage unit 802 stores information relating to the size of the sheet material P, the thickness of the sheet material P, and the adsorption surface 511 to be used.

The input means 811 is a user interface for inputting the thickness of the sheet material P and the size of the sheet material P. FIG.

The state display means 812 is means for displaying various states.

Based on the result of detection of the thickness of the sheet material P by the thickness detection means 831 and the thickness of the sheet material P input by the input means 811, the heating control means 801 follows the relational information stored in the storage means 802, Control is performed to use either the heat irradiation means 421 or the ultraviolet irradiation means 431 .

The heating control means 801 controls the output of the heat irradiation means 421 based on the detection result of the temperature detection means 422 .

The heating control means 801 controls to change the output of the heat irradiation means 421 and the ultraviolet irradiation means 431 according to the relational information stored in the storage means 802 based on the detection result of the sheet material presence/absence detection means 832 .

The transport control means 821 rotationally drives the transport motor 508 to rotate the transport belt 501 via the drive roller 502 .

The transport control means 821 receives the size information of the sheet material P from the size detection means 861, the size information of the sheet material P from the input means 811, the detection result of the sheet material thickness detection means 831 sent from the heating control means 801, the input The thickness information of the sheet material P from the means 811 is input.

Then, the transport control means 821 uses one of the suction surfaces 511a to 511c of the transport belt 501 corresponding to the thickness of the sheet material P and the size of the sheet material P according to the relational information stored in the storage means 802. Allow adsorption to occur. At this time, the transport control means 821 drives and controls the transport motor 508 based on the detection result of the adsorption surface detection means 530, and transports the sheet material P with the adsorption surface 511 so that the sheet material P is adsorbed by the adsorption surface 511 used. Alignment with the sheet material P is performed.

Next, an example of input means will be described with reference to FIG. FIG. 18 is an explanatory diagram of an example of an operation panel including input means.

The operation panel 900 includes an input unit 811A for inputting the thickness (basis weight) of the sheet material P, an input unit 811B for selecting the size of the sheet material P, a print start key 901 for instructing the start of printing, and the like. ing.

In the present application, the liquid to be ejected is not particularly limited as long as it has a viscosity and surface tension that can be ejected from the head. It is preferable to be More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, functional-imparting materials such as polymerizable compounds, resins, and surfactants, biocompatible materials such as DNA, amino acids, proteins, and calcium. , edible materials such as natural pigments, solutions, suspensions, emulsions, etc. These are, for example, inkjet inks, surface treatment liquids, components of electronic elements and light emitting elements, and formation of electronic circuit resist patterns It can be used for applications such as liquids for liquids and material liquids for three-dimensional modeling.

Piezoelectric actuators (laminated piezoelectric element and thin film piezoelectric element), thermal actuators that use electrothermal conversion elements such as heating resistors, and electrostatic actuators that consist of a diaphragm and a counter electrode are used as energy sources for liquid ejection. includes those that

In addition, the term "apparatus for ejecting liquid" includes not only devices capable of ejecting liquid onto an object to which liquid can adhere, but also devices ejecting liquid into air or liquid. .

The "liquid ejecting device" can include means for feeding, transporting, and ejecting an object to which liquid can adhere, as well as a pre-processing device, a post-processing device, and the like.

For example, as a "device that ejects liquid", an image forming device that ejects ink to form an image on paper, and powder is formed in layers to form a three-dimensional object (three-dimensional object). There is a three-dimensional modeling apparatus (three-dimensional modeling apparatus) that ejects a modeling liquid onto a formed powder layer.

Further, the "apparatus for ejecting liquid" is not limited to one that visualizes significant images such as characters and figures with the ejected liquid. For example, it includes those that form patterns that have no meaning per se, and those that form three-dimensional images.

The above-mentioned "substance to which a liquid can adhere" means a substance to which a liquid can adhere at least temporarily, such as a substance to which a liquid adheres and adheres, a substance which adheres and permeates, and the like. Specific examples include media such as recording media such as paper, recording paper, recording paper, film, and cloth, electronic components such as electronic substrates and piezoelectric elements, powder layers (powder layers), organ models, and test cells. Yes, and unless otherwise specified, includes anything that has liquid on it.

The material of the above-mentioned "thing to which a liquid can adhere" may be paper, thread, fiber, fabric, leather, metal, plastic, glass, wood, ceramics, etc., as long as the liquid can adhere even temporarily.

Further, the ``device for ejecting liquid'' includes a device in which a liquid ejection head and an object to which liquid can be adhered move relatively, but is not limited to this. Specific examples include a serial type apparatus in which the liquid ejection head is moved and a line type apparatus in which the liquid ejection head is not moved.

In addition, the "apparatus for ejecting liquid" also includes a treatment liquid coating device that ejects a treatment liquid onto the paper for the purpose of modifying the surface of the paper. There is an injection granulator that granulates fine particles of the raw material by injecting a composition liquid in which raw materials are dispersed in a solution through a nozzle.

In the present application, image formation, recording, printing, printing, printing, modeling, etc. are all synonymous.

1 printing device 10 loading unit 20 preprocessing unit 30 printing unit 40 drying unit 41 first drying unit 42 second drying unit 60 reversing mechanism unit 70 unloading unit 400 heating device 402 heat irradiation unit 403 ultraviolet irradiation unit 421 heat irradiation means 431 ultraviolet rays Irradiation means 500 Conveying device 501 Conveying belts 511a to 511c Adsorption surface 801 Heating control means 802 Conveyance control means 831 Thickness detection means 832 Sheet material presence/absence detection means 861 Size detection means

Claims (11)

Equipped with a conveyor belt that adsorbs and conveys the sheet material,
A conveying apparatus, wherein the conveying belt has different types of suction surfaces. 2. The conveying apparatus according to claim 1, wherein the different types of suction surfaces have different numbers of suction openings per unit area. 3. The conveying apparatus according to claim 1, wherein the suction surfaces of different types have different opening areas of the suction openings. 4. The conveying apparatus according to claim 1, further comprising means for controlling switching of the suction surface to be used according to the type of the sheet material. 5. The conveying device according to claim 4, wherein the type of the sheet material is the thickness of the sheet material. 6. The conveying device according to claim 4, wherein the type of the sheet material is the size of the sheet material. 7. A conveying apparatus according to claim 1, further comprising means for detecting the type of said attracting surface of said conveying belt. a conveying device according to any one of claims 1 to 7;
and means for heating the sheet material conveyed by the conveying device. The heating means includes heat irradiation means for irradiating the sheet material with thermal energy and ultraviolet irradiation means for irradiating the sheet material with ultraviolet rays, a liquid application means for applying liquid to the sheet material;
10. A device for ejecting liquid, comprising: the conveying device according to any one of claims 1 to 7; or the heating device according to claim 8 or 9. 10. A printing apparatus comprising the conveying device according to claim 1 or the heating device according to claim 8 or 9.

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