JP2021181205A

JP2021181205A - Heater

Info

Publication number: JP2021181205A
Application number: JP2020087941A
Authority: JP
Inventors: 智裕依田; Tomohiro YODA
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-11-25

Abstract

To achieve power saving of a heater which performs drying by heating and drying by air blowing simultaneously.SOLUTION: A heater includes: a heating part 31 which is disposed facing a third support surface 23 and heats a medium M in a non-contact manner; a reflection plate 32 which reflects an infrared ray IR radiated from the heating part 31 to the medium; a passage member 40 having an inlet port 44, an outlet port 45, a gas passage 50 disposed between the inlet port 44 and the outlet port 45, and a recessed part 47 which opens to the third support surface 23 side and in which the heating part 31 and the reflection plate 32 are housed, the passage member 40 disposed at the opposite side of the third support surface 23 relative to the heating part 31; a cover member 49 disposed so as to cover an opening 48; and a blower fan 46 which generates airflow to the gas passage 50 so that a gas is suctioned from the inlet port 44 and the gas is blown out from the outlet port 45 to a space between the third support surface 23 and the cover member 49. The cover member 49 is disposed so as to cover 80% or more of the opening 48.SELECTED DRAWING: Figure 1

Description

本発明は、液体が吐出されることによって画像が形成される媒体の乾燥に好適な加熱装置に関する。 The present invention relates to a heating device suitable for drying a medium in which an image is formed by ejecting a liquid.

従来、記録ヘッドからインク等の液体が吐出された媒体を加熱することによって、その媒体を乾燥させる加熱装置が知られている（例えば、特許文献１）。
特許文献１に記載の加熱装置は、支持面に支持される媒体を非接触で加熱する加熱部と、流入口及び吹出口を有する流路と、流入口から流入する気体を吹出口から吹き出させる送風機と、加熱部と支持面との間に配置される金網とを備える。加熱部の熱（赤外線）は金網越しに媒体に伝達（照射）される。吹出口から吹き出される気体は、金網と支持面との間を流動し、媒体から生じる蒸気を流入口に向けて排出する。
かかる構成を有する加熱装置は、加熱による乾燥と送風による乾燥とを同時に実行し、液体が吐出された媒体を素早く乾燥することができる。 Conventionally, there is known a heating device that dries a medium in which a liquid such as ink is discharged from a recording head to dry the medium (for example, Patent Document 1).
The heating device described in Patent Document 1 has a heating unit that heats a medium supported on a support surface in a non-contact manner, a flow path having an inlet and an outlet, and a gas flowing from the inlet and an outlet to be blown out from the outlet. It is provided with a blower and a wire mesh arranged between the heating unit and the support surface. The heat (infrared rays) of the heating unit is transmitted (irradiated) to the medium through the wire mesh. The gas blown out from the outlet flows between the wire mesh and the support surface, and the steam generated from the medium is discharged toward the inlet.
A heating device having such a configuration can simultaneously perform drying by heating and drying by blowing air, and can quickly dry the medium from which the liquid is discharged.

特開２０１９−６４１２４号公報JP-A-2019-64124

ところが、特許文献１に記載の加熱装置では、吹出口から吹き出される気体の一部が加熱部が配置される領域に流れ込み、加熱部が冷やされ、加熱部から放射される赤外線が弱くなるので、加熱部から放射される赤外線が弱くならないように、加熱部に供給される電力を大きくする必要がある。このため、省電力化が難しいという課題があった。 However, in the heating device described in Patent Document 1, a part of the gas blown out from the outlet flows into the region where the heating portion is arranged, the heating portion is cooled, and the infrared rays radiated from the heating portion are weakened. , It is necessary to increase the power supplied to the heating unit so that the infrared rays radiated from the heating unit are not weakened. Therefore, there is a problem that it is difficult to save power.

本願の加熱装置は、液体が吐出されることによって画像が形成され、支持面によって支持された媒体を加熱する加熱装置であって、前記支持面に対向配置され、非接触で前記媒体を加熱する加熱部と、前記加熱部から放射される赤外線を前記媒体に反射する反射板と、吸い込み口と、吹き出し口と、前記吸い込み口と前記吹き出し口との間に配置される気体の流路と、前記支持面側に開口し前記加熱部及び前記反射板が収納される凹部とを有し、前記加熱部に対して前記支持面と反対側に配置された流路部材と、前記開口を覆うように配置されるカバー部材と、前記吸い込み口から気体が吸い込まれ、前記吹き出し口から前記支持面と前記カバー部材との間に気体が吹き出されるように、前記気体の流路に気流を発生させる送風部と、を含み、前記カバー部材は、前記開口の８０％以上を覆うように配置される。 The heating device of the present application is a heating device that heats a medium supported by a support surface by forming an image by ejecting a liquid, and is arranged facing the support surface to heat the medium in a non-contact manner. A heating unit, a reflector that reflects infrared rays radiated from the heating unit to the medium, a suction port, an outlet, and a gas flow path arranged between the suction port and the outlet. It has a recess that opens on the support surface side and houses the heating portion and the reflector, and covers the flow path member arranged on the opposite side of the support surface with respect to the heating portion and the opening. A gas flow path is generated in the flow path of the gas so that the gas is sucked from the cover member arranged in the above and the suction port and the gas is blown out from the outlet to the support surface and the cover member. The cover member is arranged so as to cover 80% or more of the opening, including a blower portion.

実施形態に係る加熱装置を有する記録装置の概要を示す概略断面図。The schematic sectional drawing which shows the outline of the recording apparatus which has the heating apparatus which concerns on embodiment. 比較例に係る加熱装置を有する記録装置の概要を示す概略断面図。The schematic cross-sectional view which shows the outline of the recording apparatus which has the heating apparatus which concerns on a comparative example. 水に入射する赤外線の波長と赤外線の吸収率との関係を示す図。The figure which shows the relationship between the wavelength of infrared rays incident on water, and the absorption rate of infrared rays. 媒体の主成分であるセルロースの構造式。Structural formula of cellulose, which is the main component of the medium. 媒体の赤外線吸収スペクトル。Infrared absorption spectrum of the medium. ポリカーボネート樹脂の構造式。Structural formula of polycarbonate resin. ポリエチレンテレフタレート樹脂の構造式。Structural formula of polyethylene terephthalate resin. アクリル樹脂の構造式。Structural formula of acrylic resin. ビスフェノールＡ型エポキシ樹脂の構造式。Structural formula of bisphenol A type epoxy resin.

１．実施形態
１．１記録装置の概要
図１は、実施形態に係る加熱装置３０を有する記録装置１の概要を示す概略断面図である。図２は、比較例に係る加熱装置３０Ａを有する記録装置１Ａの概要を示す概略断面図である。
図１及び図２では、加熱部３１から媒体Ｍに向けて放射される赤外線ＩＲが破線の矢印で図示されている。さらに、図１及び図２では、媒体Ｍが搬送される方向が白抜きの矢印で図示され、以降、媒体Ｍが搬送される方向を搬送方向Ｆと称す。さらに、図１及び図２では、加熱装置３０において気体が流動する方向が黒い矢印で図示されている。
以降の説明では、記録装置１，１Ａの高さ方向、すなわち鉛直方向をＺ軸方向とする。Ｚ軸方向のうち重力方向と反対方向に向かう方向を＋Ｚ方向とし、Ｚ軸方向のうち重力方向に向かう方向を−Ｚ方向とする。 1. 1. Embodiment 1.1 Overview of the recording device FIG. 1 is a schematic cross-sectional view showing an outline of the recording device 1 having the heating device 30 according to the embodiment. FIG. 2 is a schematic cross-sectional view showing an outline of a recording device 1A having a heating device 30A according to a comparative example.
In FIGS. 1 and 2, the infrared IR radiated from the heating unit 31 toward the medium M is illustrated by a broken line arrow. Further, in FIGS. 1 and 2, the direction in which the medium M is conveyed is illustrated by a white arrow, and thereafter, the direction in which the medium M is conveyed is referred to as a transfer direction F. Further, in FIGS. 1 and 2, the direction in which the gas flows in the heating device 30 is illustrated by a black arrow.
In the following description, the height direction of the recording devices 1, 1A, that is, the vertical direction is defined as the Z-axis direction. The direction of the Z-axis direction opposite to the direction of gravity is defined as the + Z direction, and the direction of the Z-axis direction toward the direction of gravity is defined as the −Z direction.

記録装置１，１Ａは、加熱装置３０，３０Ａを有するインクジェット式のプリンターであり、液体の一例であるインクを吐出することによって媒体Ｍに文字、写真等の画像を記録（印刷）することができる。加熱装置３０，３０Ａは、インクが吐出されることによって画像が形成され第３支持面２３によって支持された媒体Ｍを加熱し、媒体Ｍを乾燥することができる。
詳細は後述するが、記録装置１と記録装置１Ａとでは、加熱装置の構成要素の一部が異なり、他は同じである。
最初に、図１を参照し、本実施形態に係る加熱装置３０を有する記録装置１の概要について説明する。 The recording devices 1 and 1A are inkjet printers having heating devices 30 and 30A, and can record (print) images such as characters and photographs on the medium M by ejecting ink which is an example of a liquid. .. The heating devices 30 and 30A can heat the medium M whose image is formed by ejecting the ink and supported by the third support surface 23, and can dry the medium M.
Although the details will be described later, some of the components of the heating device are different between the recording device 1 and the recording device 1A, and the others are the same.
First, with reference to FIG. 1, an outline of the recording device 1 having the heating device 30 according to the present embodiment will be described.

図１に示すように、記録装置１は、収容体１２と、媒体Ｍを支持可能な支持部１３と、媒体Ｍを支持部１３に沿って搬送する搬送部１４とを備える。さらに、記録装置１は、収容体１２内に配置された記録部１５と、収容体１２外に配置された加熱装置３０とを備える。加熱装置３０は、インクが吐出されることによって画像が形成された媒体Ｍを加熱する。
媒体Ｍは、円筒状に巻き重ねられたロール紙である。すなわち、媒体Ｍはセルロース繊維の集合体であり、媒体Ｍの主成分はセルロースである。
なお、媒体Ｍとしては、ロール紙の他に、ポリエチレンテレフタレート樹脂（ＰＥＴ樹脂）、ＰＰ（Polypropylene）樹脂、及び塩化ビニル樹脂などからなる樹脂フィルムを使用することができる。 As shown in FIG. 1, the recording device 1 includes an accommodating body 12, a support portion 13 capable of supporting the medium M, and a transport portion 14 for transporting the medium M along the support portion 13. Further, the recording device 1 includes a recording unit 15 arranged inside the housing body 12 and a heating device 30 arranged outside the housing body 12. The heating device 30 heats the medium M on which the image is formed by ejecting the ink.
The medium M is a roll of paper rolled up in a cylindrical shape. That is, the medium M is an aggregate of cellulose fibers, and the main component of the medium M is cellulose.
As the medium M, a resin film made of polyethylene terephthalate resin (PET resin), PP (Polypropylene) resin, vinyl chloride resin, or the like can be used in addition to the roll paper.

支持部１３は、第１支持板１６、第２支持板１７、及び第３支持板１８を有する。搬送部１４により搬送される媒体Ｍの搬送方向Ｆにおいてその上流側から順に第１支持板１６と、第２支持板１７と、第３支持板１８とが配置される。 The support portion 13 has a first support plate 16, a second support plate 17, and a third support plate 18. In the transport direction F of the medium M transported by the transport unit 14, the first support plate 16, the second support plate 17, and the third support plate 18 are arranged in order from the upstream side thereof.

第１支持板１６及び第２支持板１７は、収容体１２と対向するように配置される。第１支持板１６において収容体１２と対向する面が、媒体Ｍを支持するための第１支持面２１である。第２支持板１７において収容体１２と対向する面が、媒体Ｍを支持するための第２支持面２２である。支持板１６，１７において、鉛直方向における上方を向く面が支持面２１，２２である。
第３支持板１８は、加熱装置３０と対向するように配置される。第３支持板１８において加熱装置３０と対向する面が、媒体Ｍを支持するための第３支持面２３である。第３支持板１８において、鉛直方向における上方を向く面が第３支持面２３である。
なお、第３支持面２３は、本願における支持面の一例である。 The first support plate 16 and the second support plate 17 are arranged so as to face the accommodating body 12. The surface of the first support plate 16 facing the accommodating body 12 is the first support surface 21 for supporting the medium M. The surface of the second support plate 17 facing the accommodating body 12 is the second support surface 22 for supporting the medium M. In the support plates 16 and 17, the surfaces facing upward in the vertical direction are the support surfaces 21 and 22.
The third support plate 18 is arranged so as to face the heating device 30. The surface of the third support plate 18 facing the heating device 30 is the third support surface 23 for supporting the medium M. In the third support plate 18, the surface facing upward in the vertical direction is the third support surface 23.
The third support surface 23 is an example of the support surface in the present application.

搬送部１４は、例えば、媒体Ｍに接した状態で回転することによって媒体Ｍを搬送する搬送ローラー２４を有する。搬送ローラー２４は、搬送方向Ｆにおいて第１支持板１６と第２支持板１７との間に配置される。媒体Ｍは、第１支持面２１と第２支持面２２と第３支持面２３とによって支持されながら、搬送部１４によって、第１支持面２１から第３支持面２３に向かう方向に搬送される。
搬送部１４により搬送される媒体Ｍの搬送方向Ｆは、支持板１６，１７，１８の支持面２１，２２，２３に沿う方向である。 The transport unit 14 has, for example, a transport roller 24 that transports the medium M by rotating in contact with the medium M. The transport roller 24 is arranged between the first support plate 16 and the second support plate 17 in the transport direction F. The medium M is supported by the first support surface 21, the second support surface 22, and the third support surface 23, and is conveyed in the direction from the first support surface 21 to the third support surface 23 by the transport unit 14. ..
The transport direction F of the medium M transported by the transport unit 14 is a direction along the support surfaces 21, 22, 23 of the support plates 16, 17, and 18.

記録部１５は、インクを吐出するヘッド２５を有する。ヘッド２５は、第２支持板１７と対向するように配置され、第２支持板１７に支持される媒体Ｍにインクを吐出可能である。記録部１５は、媒体Ｍにインクを吐出することによって、媒体Ｍに画像を記録するように構成される。インクは、色材や、色材を分散させる（または溶解させる）溶剤などを含む。本実施形態では、インクの溶剤として水が使用されている。
詳しくは、記録部１５は、ヘッド２５を保持するキャリッジ２６と、キャリッジ２６の移動を案内するガイド軸２７とを有する。ヘッド２５は、媒体Ｍの幅方向に延びるガイド軸２７に沿って、キャリッジ２６とともに往復移動しながらインクを吐出して、媒体Ｍに画像を形成する。また、媒体Ｍの幅方向は、搬送方向Ｆと交差する方向であり、以降、単に幅方向と称す。 The recording unit 15 has a head 25 for ejecting ink. The head 25 is arranged so as to face the second support plate 17, and can eject ink to the medium M supported by the second support plate 17. The recording unit 15 is configured to record an image on the medium M by ejecting ink onto the medium M. The ink contains a coloring material, a solvent that disperses (or dissolves) the coloring material, and the like. In this embodiment, water is used as the solvent for the ink.
Specifically, the recording unit 15 has a carriage 26 for holding the head 25 and a guide shaft 27 for guiding the movement of the carriage 26. The head 25 ejects ink while reciprocating with the carriage 26 along a guide shaft 27 extending in the width direction of the medium M to form an image on the medium M. Further, the width direction of the medium M is a direction that intersects with the transport direction F, and is hereinafter simply referred to as a width direction.

１．２実施形態に係る加熱装置の概要
次に、本実施形態に係る加熱装置３０の概要について説明する。
記録装置１における第３支持板１８は、記録部１５よりも搬送方向Ｆの下流側で媒体Ｍを支持する。第３支持板１８の第３支持面２３は、記録部１５によってインクが付着された媒体Ｍを支持するための面であり、搬送方向Ｆの下流に向かうに従って−Ｚ方向に傾斜している。
加熱装置３０は、第３支持面２３に対向するように配置され、第３支持面２３に対して少し間隔をあけて配置される。加熱装置３０は、第３支持面２３によって支持され搬送方向Ｆに搬送される媒体Ｍに対して気体を吹き付けながら、媒体Ｍを加熱し、媒体Ｍに付着したインクの水分を蒸発させる。
すなわち、加熱装置３０は、搬送方向Ｆに搬送される媒体Ｍに対して、加熱による乾燥と送風による乾燥とを同時に実行する。 1.2 Outline of the heating device according to the embodiment Next, the outline of the heating device 30 according to the present embodiment will be described.
The third support plate 18 in the recording device 1 supports the medium M on the downstream side in the transport direction F from the recording unit 15. The third support surface 23 of the third support plate 18 is a surface for supporting the medium M to which the ink is attached by the recording unit 15, and is inclined in the −Z direction toward the downstream of the transport direction F.
The heating device 30 is arranged so as to face the third support surface 23, and is arranged with a slight distance from the third support surface 23. The heating device 30 heats the medium M while blowing gas onto the medium M supported by the third support surface 23 and conveyed in the transport direction F, and evaporates the water content of the ink adhering to the medium M.
That is, the heating device 30 simultaneously executes drying by heating and drying by blowing air on the medium M transported in the transport direction F.

加熱装置３０は、第３支持面２３に対向配置され非接触で媒体Ｍを加熱する加熱部３１と、加熱部３１から放射される赤外線ＩＲを媒体Ｍに反射する反射板３２と、加熱部３１に対して第３支持面２３と反対側に配置され、且つ搬送方向Ｆの上流に向かうに従って＋Ｚ方向に傾斜する流路部材４０とを有する。 The heating device 30 includes a heating unit 31 that is arranged facing the third support surface 23 and heats the medium M in a non-contact manner, a reflector 32 that reflects infrared IR radiated from the heating unit 31 to the medium M, and a heating unit 31. It has a flow path member 40 which is arranged on the side opposite to the third support surface 23 and which is inclined in the + Z direction toward the upstream of the transport direction F.

図１に示されるように、加熱部３１は、図中に破線の矢印で図示される赤外線ＩＲを第３支持面２３（媒体Ｍ）にむけて放射し、第３支持面２３に支持される媒体Ｍを加熱する。加熱部３１としては、例えば、シーズヒーターやハロゲンヒーターなどを使用できる。
加熱部３１は、幅方向に長い円筒形状を有する。加熱部３１の幅方向の寸法は、媒体Ｍの幅方向の寸法よりも長い。加熱部３１は、第３支持面２３と対向する位置に、搬送方向Ｆに間隔を開けて複数（本実施形態では２つ）配置される。
反射板３２は、加熱部３１に対して第３支持面２３と反対側に配置され、凹曲面状の反射面を有する。反射板３２の幅方向の寸法は、加熱部３１の幅方向の寸法よりも長い。反射板３２は、搬送方向Ｆに間隔を開けて複数配置される加熱部３１のそれぞれに設けられている。反射板３２は、加熱部３１から放射される赤外線ＩＲを第３支持面２３（媒体Ｍ）に向けて反射する。
これにより、加熱部３１から放射される赤外線ＩＲの大部分が第３支持面２３に向かい、第３支持面２３に支持される媒体Ｍが輻射によって加熱される。 As shown in FIG. 1, the heating unit 31 radiates the infrared IR shown by the broken line arrow in the figure toward the third support surface 23 (medium M) and is supported by the third support surface 23. The medium M is heated. As the heating unit 31, for example, a sheathed heater, a halogen heater, or the like can be used.
The heating unit 31 has a cylindrical shape that is long in the width direction. The widthwise dimension of the heating portion 31 is longer than the widthwise dimension of the medium M. A plurality (two in this embodiment) of the heating portions 31 are arranged at positions facing the third support surface 23 with an interval in the transport direction F.
The reflector 32 is arranged on the side opposite to the third support surface 23 with respect to the heating portion 31, and has a concave curved surface. The widthwise dimension of the reflector 32 is longer than the widthwise dimension of the heating unit 31. A plurality of reflectors 32 are provided in each of the heating portions 31 arranged at intervals in the transport direction F. The reflector 32 reflects the infrared IR radiated from the heating unit 31 toward the third support surface 23 (medium M).
As a result, most of the infrared IR emitted from the heating unit 31 faces the third support surface 23, and the medium M supported by the third support surface 23 is heated by radiation.

流路部材４０は、加熱部３１に対して第３支持面２３と反対側に配置される。流路部材４０は、加熱部３１側に配置される第１部材４１と、第１部材４１に対して加熱部３１と反対側に配置される第２部材４２とを有する。第１部材４１と第２部材４２とは、搬送方向Ｆの上流に向かうに従って＋Ｚ方向に傾斜する。
第１部材４１と第２部材４２とが接合されることによって、加熱部３１に対して第３支持面２３と反対側に配置され、且つ搬送方向Ｆの上流に向かうに従って＋Ｚ方向に傾斜する流路部材４０が形成される。 The flow path member 40 is arranged on the side opposite to the third support surface 23 with respect to the heating portion 31. The flow path member 40 has a first member 41 arranged on the heating unit 31 side and a second member 42 arranged on the opposite side of the heating unit 31 with respect to the first member 41. The first member 41 and the second member 42 are inclined in the + Z direction toward the upstream of the transport direction F.
By joining the first member 41 and the second member 42, the flow is arranged on the side opposite to the third support surface 23 with respect to the heating portion 31, and is inclined in the + Z direction toward the upstream of the transport direction F. The road member 40 is formed.

流路部材４０の内部には空洞５０が形成される。流路部材４０の内部に形成される空洞５０は、気体の流路であり、以降、気体の流路５０と称す。また、気体の流路５０の搬送方向Ｆの下流側には、気体が吸い込まれる吸い込み口４４が配置される。気体の流路５０の搬送方向Ｆの上流側には、気体が吹き出される吹き出し口４５が配置される。気体の流路５０は、吸い込み口４４と吹き出し口４５との間に配置される。
このように、流路部材４０は、吸い込み口４４と、吹き出し口４５と、吸い込み口４４と吹き出し口４５との間に配置される気体の流路５０とを有し、加熱部３１に対して第３支持面２３と反対側に配置される。 A cavity 50 is formed inside the flow path member 40. The cavity 50 formed inside the flow path member 40 is a gas flow path, and will be hereinafter referred to as a gas flow path 50. Further, a suction port 44 for sucking the gas is arranged on the downstream side of the gas flow path 50 in the transport direction F. An outlet 45 through which the gas is blown out is arranged on the upstream side of the gas flow path 50 in the transport direction F. The gas flow path 50 is arranged between the suction port 44 and the outlet port 45.
As described above, the flow path member 40 has a suction port 44, a blowout port 45, and a gas flow path 50 arranged between the suction port 44 and the blowout port 45, with respect to the heating unit 31. It is arranged on the side opposite to the third support surface 23.

気体の流路５０は、吸い込み口４４を始端として第３支持面２３から遠ざかる第１部分５０ａと、搬送方向Ｆの上流に向かうに従って＋Ｚ方向に傾斜する第２部分５０ｂと、気体の流動方向を反転させる第３部分５０ｃとを有する。また、気体の流動方向を反転させる第３部分５０ｃの末端に、吹き出し口４５が配置される。気体の流路５０の断面視において、第１部分５０ａ及び第２部分５０ｂは一方向に延びる直線形状を有し、第３部分５０ｃはＵ字形状に曲がった曲線形状を有する。 The gas flow path 50 has a first portion 50a that moves away from the third support surface 23 starting from the suction port 44, a second portion 50b that inclines in the + Z direction toward the upstream of the transport direction F, and a gas flow direction. It has a third portion 50c to be inverted. Further, the outlet 45 is arranged at the end of the third portion 50c that reverses the flow direction of the gas. In the cross-sectional view of the gas flow path 50, the first portion 50a and the second portion 50b have a linear shape extending in one direction, and the third portion 50c has a curved shape curved in a U shape.

第１部材４１は、気体の流路５０と同じ形状を有し、吸い込み口４４を始端として第３支持面２３から遠ざかる第１部分４１ａと、搬送方向Ｆの上流に向かうに従って＋Ｚ方向に傾斜する第２部分４１ｂと、気体の流動方向を反転させる第３部分４１ｃとを有する。第１部材４１の断面視において、第１部分４１ａ及び第２部分４１ｂは一方向に延びる直線形状を有し、第３部分４１ｃはＵ字形状に曲がった曲線形状を有する。
第１部材４１には、第１部分４１ａと第２部分４１ｂと第３部分４１ｃとによって、第３支持面２３から遠ざかる方向に窪んだ凹部４７が形成される。凹部４７は第３支持面２３側に開口し、凹部４７の第３支持面２３側の端が開口４８の端である。
このように、第１部材４１は、第３支持面２３側に開口する凹部４７を有する。 The first member 41 has the same shape as the gas flow path 50, and is inclined in the + Z direction toward the upstream of the transport direction F with the first portion 41a away from the third support surface 23 with the suction port 44 as the starting end. It has a second portion 41b and a third portion 41c that reverses the flow direction of the gas. In the cross-sectional view of the first member 41, the first portion 41a and the second portion 41b have a linear shape extending in one direction, and the third portion 41c has a curved shape curved in a U shape.
The first member 41 is formed with a recess 47 recessed in a direction away from the third support surface 23 by the first portion 41a, the second portion 41b, and the third portion 41c. The recess 47 opens to the third support surface 23 side, and the end of the recess 47 on the third support surface 23 side is the end of the opening 48.
As described above, the first member 41 has a recess 47 that opens on the third support surface 23 side.

凹部４７の幅方向の寸法は、凹部４７の搬送方向Ｆの寸法よりも長い。第３支持面２３に直交する方向から見た平面視において、凹部４７は幅方向に長い長方形状を有する。
凹部４７の幅方向寸法は、反射板３２の幅方向の寸法及び加熱部３１の幅方向の寸法よりも長く、反射板３２及び加熱部３１を凹部４７の中に収納することができる。そして、反射板３２及び加熱部３１は、第１部材４１の凹部４７の中に収納されている。
このように、第１部材４１は、第３支持面２３側に開口し加熱部３１及び反射板３２が収納される凹部４７を有する。 The dimension in the width direction of the recess 47 is longer than the dimension in the transport direction F of the recess 47. In a plan view viewed from a direction orthogonal to the third support surface 23, the recess 47 has a rectangular shape long in the width direction.
The widthwise dimension of the recess 47 is longer than the widthwise dimension of the reflector 32 and the widthwise dimension of the heating portion 31, and the reflector plate 32 and the heating portion 31 can be housed in the recessed portion 47. The reflector 32 and the heating unit 31 are housed in the recess 47 of the first member 41.
As described above, the first member 41 has a recess 47 that opens on the third support surface 23 side and houses the heating portion 31 and the reflector 32.

第１部材４１の第３支持面２３側の端には、カバー部材４９が接合されている。カバー部材４９は、開口４８（凹部４７の第３支持面２３側）を覆うように配置されている。第３支持面２３に直交する方向から見た平面視において、開口４８は、カバー部材４９の内側に配置される。
本実施形態では、カバー部材４９は、凹部４７の開口４８の全体（開口４８の１００％）を覆うように配置されている。 A cover member 49 is joined to the end of the first member 41 on the third support surface 23 side. The cover member 49 is arranged so as to cover the opening 48 (the third support surface 23 side of the recess 47). The opening 48 is arranged inside the cover member 49 in a plan view viewed from a direction orthogonal to the third support surface 23.
In the present embodiment, the cover member 49 is arranged so as to cover the entire opening 48 (100% of the opening 48) of the recess 47.

カバー部材４９は、加熱部３１から放射される赤外線ＩＲを透過可能な材料で構成されている。図中に破線の矢印で図示されるように、加熱部３１から放射される赤外線ＩＲは、カバー部材４９を透過し、第３支持面２３に支持される媒体Ｍに照射される。また、図示を省略するが、加熱部３１から放射され反射板３２によって反射される赤外線ＩＲは、カバー部材４９を透過し、第３支持面２３に支持される媒体Ｍに照射される。媒体Ｍは、加熱部３１または反射板３２から照射される赤外線ＩＲを吸収し、加熱される。
なお、カバー部材４９を構成する材料の詳細は後述する。 The cover member 49 is made of a material capable of transmitting infrared IR radiated from the heating unit 31. As shown by the broken line arrow in the figure, the infrared IR emitted from the heating unit 31 passes through the cover member 49 and irradiates the medium M supported by the third support surface 23. Further, although not shown, the infrared IR emitted from the heating unit 31 and reflected by the reflector 32 passes through the cover member 49 and irradiates the medium M supported by the third support surface 23. The medium M absorbs infrared IR emitted from the heating unit 31 or the reflector 32 and is heated.
The details of the materials constituting the cover member 49 will be described later.

気体の流路５０の中には、送風部の一例である送風ファン４６が配置されている。送風ファン４６は、気体の流路５０における第２部分５０ｂの中央に取り付けられている。送風ファン４６が駆動されると、吸い込み口４４から気体が吸い込まれ、吹き出し口４５から第３支持面２３とカバー部材４９との間に気体が吹き出されるように、気体の流路５０に気流が発生する。
このように、加熱装置３０は、吸い込み口４４から気体が吸い込まれ、吹き出し口４５から第３支持面２３とカバー部材４９との間に気体が吹き出されるように、気体の流路５０に気流を発生させる送風ファン４６を有する。 A blower fan 46, which is an example of a blower portion, is arranged in the gas flow path 50. The blower fan 46 is attached to the center of the second portion 50b in the gas flow path 50. When the blower fan 46 is driven, gas is sucked from the suction port 44, and the gas is blown out from the outlet 45 between the third support surface 23 and the cover member 49. Occurs.
In this way, the heating device 30 sucks the gas from the suction port 44, and blows out the gas from the outlet 45 between the third support surface 23 and the cover member 49, so that the air flow flows into the gas flow path 50. Has a blower fan 46 to generate.

図中に太い実線の矢印で示されるように、送風ファン４６が駆動されると、吸い込み口４４から吸い込まれた気体は、気体の流路５０の第１部分５０ａと、気体の流路５０の第２部分５０ｂと、気体の流路５０の第３部分５０ｃとを流動し、吹き出し口４５から搬送方向Ｆに搬送される媒体Ｍに向けて吹き出される。
吹き出し口４５から吹き出される気体は、第３支持面２３とカバー部材４９との間を搬送方向Ｆに流動し、加熱装置３０の外側に排出される。吹き出し口４５から吹き出される気体は、記録部１５が位置する側と反対側に排出される。 As shown by the thick solid arrow in the figure, when the blower fan 46 is driven, the gas sucked from the suction port 44 becomes the first portion 50a of the gas flow path 50 and the gas flow path 50. The second portion 50b and the third portion 50c of the gas flow path 50 flow and are blown out from the outlet 45 toward the medium M transported in the transport direction F.
The gas blown out from the outlet 45 flows between the third support surface 23 and the cover member 49 in the transport direction F, and is discharged to the outside of the heating device 30. The gas blown out from the outlet 45 is discharged to the side opposite to the side where the recording unit 15 is located.

加熱装置３０では、吹き出し口４５から媒体Ｍに対して気体が吹き出された状態で、加熱部３１が搬送方向Ｆに搬送される媒体Ｍを非接触で加熱し、媒体Ｍに付着したインクの水分を蒸発させ、媒体Ｍを乾燥させる。
加熱部３１によって加熱され蒸気を含む気体は、吹き出し口４５から吹き出される気体によって加熱装置３０の外側に排出されるので、媒体Ｍ付近に滞留せず、インクの水分の蒸発が促進され、媒体Ｍが素早く乾燥される。
すなわち、加熱装置３０は、加熱による乾燥と送風による乾燥とを同時に実行するので、加熱による乾燥だけが実行される場合と比べて、媒体Ｍの乾燥速度が速くなる。 In the heating device 30, the heating unit 31 heats the medium M transported in the transport direction F in a non-contact manner while the gas is blown out from the outlet 45 to the medium M, and the moisture content of the ink adhering to the medium M is reached. Is evaporated and the medium M is dried.
Since the gas heated by the heating unit 31 and containing steam is discharged to the outside of the heating device 30 by the gas blown out from the outlet 45, it does not stay in the vicinity of the medium M, the evaporation of the ink moisture is promoted, and the medium. M is dried quickly.
That is, since the heating device 30 simultaneously executes the drying by heating and the drying by blowing air, the drying speed of the medium M is faster than the case where only the drying by heating is executed.

例えば、加熱部３１によって加熱され蒸気を含む気体が記録部１５側に排出されると、記録部１５が温められ、記録部１５の記録品質に悪影響を及ぼしやすい。本実施形態では、加熱部３１によって加熱され蒸気を含む気体は記録部１５と反対側（搬送方向Ｆの下流側）に排出されるので、記録部１５が温められず、記録部１５の記録品質に悪影響を及ぼしにくい。
例えば、加熱部３１によって媒体Ｍの温度が高くなりすぎると、媒体Ｍの品質が低下し、媒体Ｍの変色や媒体Ｍの変形などの不具合が発生する。吹き出し口４５から吹き出される気体は、媒体Ｍの温度が高くなりすぎないように媒体Ｍを冷やし、媒体Ｍの品質低下を抑制する。 For example, when the gas heated by the heating unit 31 and containing steam is discharged to the recording unit 15, the recording unit 15 is warmed and the recording quality of the recording unit 15 is likely to be adversely affected. In the present embodiment, since the gas heated by the heating unit 31 and containing steam is discharged to the side opposite to the recording unit 15 (downstream side in the transport direction F), the recording unit 15 is not heated and the recording quality of the recording unit 15 is recorded. Is unlikely to have an adverse effect on.
For example, if the temperature of the medium M becomes too high due to the heating unit 31, the quality of the medium M deteriorates, and problems such as discoloration of the medium M and deformation of the medium M occur. The gas blown out from the outlet 45 cools the medium M so that the temperature of the medium M does not become too high, and suppresses deterioration of the quality of the medium M.

１．３比較例に係る加熱装置の概要
次に、図２を参照し、比較例に係る加熱装置３０Ａの概要について説明する。
図２では、実施形態に係る加熱装置３０と同じ構成要素には、同じ符号が付されている。以下の説明では、実施形態に係る加熱装置３０と同じ構成要素に関する説明は省略し、実施形態に係る加熱装置３０と異なる構成要素に関して説明する。 1.3 Outline of the heating device according to the comparative example Next, with reference to FIG. 2, the outline of the heating device 30A according to the comparative example will be described.
In FIG. 2, the same components as those of the heating device 30 according to the embodiment are designated by the same reference numerals. In the following description, the description of the same components as the heating device 30 according to the embodiment will be omitted, and the components different from the heating device 30 according to the embodiment will be described.

本実施形態に係る加熱装置３０では、開口４８が赤外線ＩＲを透過する材料で構成されるカバー部材４９によって覆われている。本比較例に係る加熱装置３０Ａでは、開口４８が金網４９Ａによって覆われている。この点が、本実施形態に係る加熱装置３０と本比較例に係る加熱装置３０Ａとの相違点である。
他の構成は、本実施形態に係る加熱装置３０と本比較例に係る加熱装置３０Ａとで同じである。 In the heating device 30 according to the present embodiment, the opening 48 is covered with a cover member 49 made of a material that transmits infrared IR. In the heating device 30A according to this comparative example, the opening 48 is covered with a wire mesh 49A. This point is a difference between the heating device 30 according to the present embodiment and the heating device 30A according to the present comparative example.
Other configurations are the same for the heating device 30 according to the present embodiment and the heating device 30A according to the present comparative example.

図２に示すように、媒体Ｍと加熱部３１との間に金網４９Ａが配置され、加熱部３１が金網４９Ａによって保護される。図中に破線の矢印で示されるように、加熱部３１から放射される赤外線ＩＲは、金網４９Ａの網目を通過し、媒体Ｍに照射される。図示を省略するが、加熱部３１から放射され反射板３２によって反射される赤外線ＩＲは、金網４９Ａの網目を通過し、媒体Ｍに照射される。媒体Ｍは、加熱部３１または反射板３２から照射される赤外線ＩＲを吸収し、加熱される。 As shown in FIG. 2, a wire mesh 49A is arranged between the medium M and the heating unit 31, and the heating unit 31 is protected by the wire mesh 49A. As shown by the broken line arrow in the figure, the infrared IR emitted from the heating unit 31 passes through the mesh of the wire mesh 49A and irradiates the medium M. Although not shown, the infrared IR emitted from the heating unit 31 and reflected by the reflector 32 passes through the mesh of the wire mesh 49A and irradiates the medium M. The medium M absorbs infrared IR emitted from the heating unit 31 or the reflector 32 and is heated.

例えば、媒体Ｍのジャムによって、媒体Ｍが第３支持面２３から浮き上がる場合がある。金網４９Ａは、第３支持面２３から浮き上がった媒体Ｍが加熱部３１に接触しないように、加熱部３１を保護する。金網４９Ａを設けることによって、媒体Ｍが加熱部３１に接触するというトラブルが生じなくなる。
本実施形態に係る加熱装置３０においても、カバー部材４９は、第３支持面２３から浮き上がった媒体Ｍが加熱部３１に接触しないように、加熱部３１を保護する。カバー部材４９を設けることによって、媒体Ｍが加熱部３１に接触するというトラブルが生じなくなる。 For example, the medium M may be lifted from the third support surface 23 due to the jam of the medium M. The wire mesh 49A protects the heating portion 31 so that the medium M lifted from the third support surface 23 does not come into contact with the heating portion 31. By providing the wire mesh 49A, the trouble that the medium M comes into contact with the heating portion 31 does not occur.
Also in the heating device 30 according to the present embodiment, the cover member 49 protects the heating unit 31 so that the medium M floating from the third support surface 23 does not come into contact with the heating unit 31. By providing the cover member 49, the trouble that the medium M comes into contact with the heating portion 31 does not occur.

金網４９Ａの網目は、加熱部３１から放射される赤外線ＩＲを通過させるに加えて、吹き出し口４５から吹き出される気体の一部を通過させる。その結果、図２に細い実線の矢印で示されるように、吹き出し口４５から吹き出される気体の一部が、金網４９Ａを通過して凹部４７の中に侵入し、凹部４７の中に収容される加熱部３１や反射板３２を冷やす。 The mesh of the wire mesh 49A passes a part of the gas blown out from the outlet 45 in addition to passing the infrared IR radiated from the heating unit 31. As a result, as shown by the thin solid arrow in FIG. 2, a part of the gas blown out from the outlet 45 passes through the wire mesh 49A and enters the recess 47, and is housed in the recess 47. The heating unit 31 and the reflector 32 are cooled.

加熱部３１の温度が高くなると加熱部３１から放射される赤外線ＩＲの強度が強くなり、加熱部３１の温度が低くなると加熱部３１から放射される赤外線ＩＲの強度が弱くなるという関係にある。このため、吹き出し口４５から吹き出される気体によって加熱部３１が冷やされると、加熱部３１から放射される赤外線ＩＲの強度が弱くなる。
このため、比較例に係る加熱装置３０Ａでは、吹き出し口４５から吹き出される気体によって加熱部３１の温度が低下し、加熱部３１から放射される赤外線ＩＲの強度が弱くならないように、加熱部３１に供給される電力を増加させる必要がある。 The higher the temperature of the heating unit 31, the stronger the intensity of the infrared IR emitted from the heating unit 31, and the lower the temperature of the heating unit 31, the weaker the intensity of the infrared IR emitted from the heating unit 31. Therefore, when the heating unit 31 is cooled by the gas blown out from the outlet 45, the intensity of the infrared IR emitted from the heating unit 31 is weakened.
Therefore, in the heating device 30A according to the comparative example, the heating unit 31 is prevented from lowering the temperature of the heating unit 31 due to the gas blown out from the outlet 45 and weakening the intensity of the infrared IR emitted from the heating unit 31. It is necessary to increase the power supplied to.

一方、本実施形態に係る加熱装置３０では、凹部４７の開口４８がカバー部材４９によって覆われ、塞がれているので、吹き出し口４５から吹き出される気体の一部は、凹部４７の中に侵入せず、吹き出し口４５から吹き出される気体によって、加熱部３１が冷やされない。このため、比較例に係る加熱装置３０Ａでは、吹き出し口４５から吹き出される気体によって加熱部３１の温度が低下しないように、加熱部３１に供給される電力を増加させる必要があったが、本実施形態に係る加熱装置３０では、吹き出し口４５から吹き出される気体によって加熱部３１の温度が低下しないので、加熱部３１に供給される電力を増加させる必要がない。
従って、吹き出し口４５から吹き出される気体によって加熱部３１が冷やされない本実施形態に係る加熱装置３０は、吹き出し口４５から吹き出される気体によって加熱部３１が冷やされる比較例に係る加熱装置３０Ａと比べて、加熱部３１に供給される電力が少なくなり、省電力化が実現される。 On the other hand, in the heating device 30 according to the present embodiment, since the opening 48 of the recess 47 is covered and closed by the cover member 49, a part of the gas blown out from the outlet 45 is in the recess 47. The heating unit 31 is not cooled by the gas that does not enter and is blown out from the outlet 45. Therefore, in the heating device 30A according to the comparative example, it is necessary to increase the electric power supplied to the heating unit 31 so that the temperature of the heating unit 31 does not decrease due to the gas blown out from the outlet 45. In the heating device 30 according to the embodiment, since the temperature of the heating unit 31 is not lowered by the gas blown out from the outlet 45, it is not necessary to increase the electric power supplied to the heating unit 31.
Therefore, the heating device 30 according to the present embodiment in which the heating unit 31 is not cooled by the gas blown out from the outlet 45 is the heating device 30A according to the comparative example in which the heating unit 31 is cooled by the gas blown out from the outlet 45. In comparison, the amount of electric power supplied to the heating unit 31 is reduced, and power saving is realized.

さらに、本実施形態に係る加熱装置３０は、吹き出し口４５から吹き出される気体の一部が凹部４７の中に侵入せず、吹き出し口４５から吹き出される気体の全部が媒体Ｍに吹き付けられるので、吹き出し口４５から吹き出される気体の一部が凹部４７の中に侵入する比較例に係る加熱装置３０Ａと比べて、媒体Ｍに吹き付けられる気体の量が多くなり、送風による乾燥が促進され、効率的に媒体Ｍを乾燥させることができる。 Further, in the heating device 30 according to the present embodiment, a part of the gas blown out from the outlet 45 does not enter the recess 47, and all the gas blown out from the outlet 45 is blown to the medium M. Compared with the heating device 30A according to the comparative example in which a part of the gas blown out from the outlet 45 invades into the recess 47, the amount of gas blown to the medium M is increased, and drying by blowing air is promoted. The medium M can be efficiently dried.

なお、吹き出し口４５から吹き出される気体によって加熱部３１が冷やされないようにするためには、カバー部材４９が開口４８の８０％以上を覆っていればよい。すなわち、本実施形態に係る加熱装置３０は、カバー部材４９が開口４８の８０％以上を覆うように配置される構成を有していればよい。
カバー部材４９が開口４８の８０％以上を覆うと、吹き出し口４５から吹き出される気体によって加熱部３１が冷やされなくなるので、加熱部３１に供給される電力が少なくなり、省電力化が実現されるというカバー部材４９が開口４８の全体を覆う場合と同等の効果を得ることができる。 In order to prevent the heating unit 31 from being cooled by the gas blown out from the outlet 45, the cover member 49 may cover 80% or more of the opening 48. That is, the heating device 30 according to the present embodiment may have a configuration in which the cover member 49 is arranged so as to cover 80% or more of the opening 48.
When the cover member 49 covers 80% or more of the opening 48, the heating unit 31 is not cooled by the gas blown out from the outlet 45, so that the power supplied to the heating unit 31 is reduced and power saving is realized. The same effect as when the cover member 49 covering the entire opening 48 can be obtained.

１．４カバー部材の概要
図３は、水に入射する赤外線ＩＲの波長と赤外線ＩＲの吸収率との関係を示す図である。図４は、媒体Ｍの主成分であるセルロースの構造式である。図５は、媒体Ｍの赤外線吸収スペクトルであり、媒体Ｍに入射する赤外線の波数（波長）と吸光度との関係を示す図である。図６は、ポリカーボネート樹脂の構造式である。図７は、ポリエチレンテレフタレート樹脂の構造式である。図８は、アクリル樹脂の構造式である。図９は、ビスフェノールＡ型エポキシ樹脂の構造式である。 1.4 Outline of the cover member FIG. 3 is a diagram showing the relationship between the wavelength of the infrared IR incident on water and the absorption rate of the infrared IR. FIG. 4 is a structural formula of cellulose, which is the main component of the medium M. FIG. 5 is an infrared absorption spectrum of the medium M, and is a diagram showing the relationship between the wave number (wavelength) of infrared rays incident on the medium M and the absorbance. FIG. 6 is a structural formula of the polycarbonate resin. FIG. 7 is a structural formula of a polyethylene terephthalate resin. FIG. 8 is a structural formula of the acrylic resin. FIG. 9 is a structural formula of a bisphenol A type epoxy resin.

図３の横軸は赤外線ＩＲの波長であり、図３の縦軸は吸収率である。図３の縦軸の吸収率は、水に吸収された赤外線ＩＲの強度を水に入射した赤外線ＩＲの強度で除した数値（割合）であり、赤外線ＩＲがどの程度水に吸収されるのかを示す。すなわち、吸収率の値が大きいほど、赤外線ＩＲの吸収の度合いが大きくなる。
図５の横軸は赤外線ＩＲの波数または波長であり、図５の縦軸は吸光度である。図５の縦軸の吸光度は、媒体Ｍを透過した赤外線ＩＲの強度を媒体Ｍに入射する赤外線ＩＲの強度で除した数値（割合）を透過率とした場合、当該透過率の逆数の常用対数で表される数値である。吸光度の値が大きいほど、赤外線ＩＲの吸収の度合いが大きくなる。図５の横軸における上段には赤外線ＩＲの波長が示され、図５の横軸における下段には赤外線ＩＲの波数が示されている。
さらに、図６〜図９では、炭素原子と酸素原子と炭素原子とが結合された部分が破線で囲まれている。 The horizontal axis of FIG. 3 is the wavelength of infrared IR, and the vertical axis of FIG. 3 is the absorption rate. The absorption rate on the vertical axis of FIG. 3 is a numerical value (ratio) obtained by dividing the intensity of infrared IR absorbed by water by the intensity of infrared IR incident on water, and indicates how much infrared IR is absorbed by water. show. That is, the larger the value of the absorption rate, the greater the degree of absorption of infrared IR.
The horizontal axis of FIG. 5 is the wave number or wavelength of infrared IR, and the vertical axis of FIG. 5 is the absorbance. The absorbance on the vertical axis of FIG. 5 is the common logarithm of the reciprocal of the transmittance when the transmittance is a numerical value (ratio) obtained by dividing the intensity of the infrared IR transmitted through the medium M by the intensity of the infrared IR incident on the medium M. It is a numerical value represented by. The larger the absorbance value, the greater the degree of absorption of infrared IR. The wavelength of the infrared IR is shown in the upper row on the horizontal axis of FIG. 5, and the wave number of the infrared IR is shown in the lower row on the horizontal axis of FIG.
Further, in FIGS. 6 to 9, the portion where the carbon atom, the oxygen atom, and the carbon atom are bonded is surrounded by a broken line.

図３に示すように、水は、波長が概略２．６μｍ〜３．３μｍの赤外線ＩＲと、波長が概略５μｍ〜７．７μｍである赤外線ＩＲとを吸収する。図３において、波長が概略２．６μｍ〜３．３μｍである赤外線ＩＲが吸収される部分は破線で囲まれた領域Ａであり、波長が概略５μｍ〜７．７μｍである赤外線ＩＲが吸収される部分は破線で囲まれた領域Ｂである。
以降の説明では、例えば、波長が概略２．６μｍ〜３．３μｍである赤外線ＩＲを概略２．６μｍ〜３．３μｍの赤外線ＩＲと称し、波長が概略５μｍ〜７．７μｍである赤外線ＩＲを概略５μｍ〜７．７μｍの赤外線ＩＲと称す。例えば、波長が概略２．６μｍ〜３．３μｍである赤外線ＩＲが吸収されることを示す波形を概略２．６μｍ〜３．３μｍのピークと称し、波長が概略５μｍ〜７．７μｍである赤外線ＩＲが吸収されることを示す波形を概略５μｍ〜７．７μｍのピークと称す。 As shown in FIG. 3, water absorbs an infrared IR having a wavelength of approximately 2.6 μm to 3.3 μm and an infrared IR having a wavelength of approximately 5 μm to 7.7 μm. In FIG. 3, the portion where the infrared IR having a wavelength of approximately 2.6 μm to 3.3 μm is absorbed is the region A surrounded by the broken line, and the infrared IR having a wavelength of approximately 5 μm to 7.7 μm is absorbed. The portion is a region B surrounded by a broken line.
In the following description, for example, an infrared IR having a wavelength of approximately 2.6 μm to 3.3 μm is referred to as an infrared IR of approximately 2.6 μm to 3.3 μm, and an infrared IR having a wavelength of approximately 5 μm to 7.7 μm is schematically described. It is called an infrared IR of 5 μm to 7.7 μm. For example, a waveform indicating that an infrared IR having a wavelength of approximately 2.6 μm to 3.3 μm is absorbed is referred to as a peak of approximately 2.6 μm to 3.3 μm, and an infrared IR having a wavelength of approximately 5 μm to 7.7 μm is referred to as a peak. The waveform indicating that is absorbed is referred to as a peak of approximately 5 μm to 7.7 μm.

水は、構造式Ｈ₂Ｏで表される分子である。概略２．６μｍ〜３．３μｍのピークは、ＯＨ伸縮振動に起因するピークである。その結果、概略２．６μｍ〜３．３μｍの赤外線ＩＲは水に吸収され、水を構成するＯＨ基の伸縮運動が強くなり、水が加熱される。概略５μｍ〜７．７μｍのピークは、Ｈ₂Ｏ分子のＯＨ変角振動に起因するピークである。概略５μｍ〜７．７μｍの赤外線ＩＲは水に吸収され、水を構成するＯＨ基の伸縮運動が強くなり、水が加熱される。
このように、水は、１）概略２．６μｍ〜３．３μｍの赤外線ＩＲが吸収される領域Ａと、２）概略５μｍ〜７．７μｍの赤外線ＩＲが吸収される領域Ｂとを有する。そして、概略２．６μｍ〜３．３μｍの赤外線ＩＲ及び概略５μｍ〜７．７μｍの赤外線ＩＲは、水に吸収され、水が加熱される。 Water is a molecule represented by the structural formula H _{2 O.} The peak of approximately 2.6 μm to 3.3 μm is a peak caused by OH expansion and contraction vibration. As a result, the infrared IR of approximately 2.6 μm to 3.3 μm is absorbed by water, the expansion and contraction movement of the OH groups constituting the water becomes strong, and the water is heated. The peak of approximately 5 μm to 7.7 μm is a peak caused by the OH angular vibration of _{the H 2 O molecule.} Infrared IR of approximately 5 μm to 7.7 μm is absorbed by water, the expansion and contraction movement of the OH groups constituting the water becomes strong, and the water is heated.
As described above, water has 1) a region A in which infrared IR of approximately 2.6 μm to 3.3 μm is absorbed, and 2) a region B in which infrared IR of approximately 5 μm to 7.7 μm is absorbed. Then, the infrared IR of approximately 2.6 μm to 3.3 μm and the infrared IR of approximately 5 μm to 7.7 μm are absorbed by water, and the water is heated.

上述したように、媒体Ｍはセルロース繊維の集合体であり、媒体Ｍの主成分はセルロースである。
図４に示すように、媒体Ｍの構成材料であるセルロースは、分子式（Ｃ₆Ｈ₁₀Ｏ₅）ｎで表され、グルコース分子がグリコシド結合によって直鎖状に重合した天然の高分子化合物である。セルロースは、炭素原子と酸素原子と炭素原子とが結合された部分、炭素原子と水素原子とが結合した部分、及び炭素原子と酸素原子と水素原子とが結合した部分を有する。換言すれば、セルロースは、Ｃ−Ｏ−Ｃ結合、ＣＨ結合、及びＣ−ＯＨ結合を有する。さらに、媒体Ｍは、セルロース分子が結合材によって他のセルロース分子に結合されており、Ｃ−Ｏ−Ｃ結合、ＣＨ結合、及びＣ−ＯＨ結合の他に、ＣＨ₂結合を有する。 As described above, the medium M is an aggregate of cellulose fibers, and the main component of the medium M is cellulose.
As shown in FIG. 4, cellulose, which is a constituent material of the medium M, is represented by the molecular formula (C ₆ H ₁₀ O ₅ ) n and is a natural polymer compound in which glucose molecules are linearly polymerized by glycosidic bonds. .. Cellulose has a portion in which a carbon atom, an oxygen atom and a carbon atom are bonded, a portion in which a carbon atom and a hydrogen atom are bonded, and a portion in which a carbon atom, an oxygen atom and a hydrogen atom are bonded. In other words, cellulose has C—O—C bonds, CH bonds, and C—OH bonds. Further, the medium M has a cellulose molecule bonded to another cellulose molecule by a binder and has a CH ₂ bond in addition to a C—O—C bond, a CH bond, and a C—OH bond.

図５に示すように、媒体Ｍは、概略２．８μｍ〜３．２μｍの赤外線ＩＲと、概略６．７μｍ〜８．３μｍの赤外線ＩＲと、概略９．１μｍ〜１０．８μｍの赤外線ＩＲとを吸収する。図５において、概略２．８μｍ〜３．２μｍの赤外線ＩＲが吸収される部分は破線で囲まれた領域Ｃであり、概略６．７μｍ〜８．３μｍの赤外線ＩＲが吸収される部分は破線で囲まれた領域Ｄであり、概略９．１μｍ〜１０．８μｍの赤外線ＩＲが吸収される部分は破線で囲まれた領域Ｅである。 As shown in FIG. 5, the medium M includes an infrared IR of approximately 2.8 μm to 3.2 μm, an infrared IR of approximately 6.7 μm to 8.3 μm, and an infrared IR of approximately 9.1 μm to 10.8 μm. Absorb. In FIG. 5, the portion where the infrared IR of approximately 2.8 μm to 3.2 μm is absorbed is the region C surrounded by the broken line, and the portion where the infrared IR of approximately 6.7 μm to 8.3 μm is absorbed is the dashed line. The enclosed region D, and the portion where the infrared IR of approximately 9.1 μm to 10.8 μm is absorbed is the region E surrounded by the broken line.

概略２．８μｍ〜３．２μｍの赤外線ＩＲが吸収される領域Ｃは、Ｃ−ＯＨ結合におけるＯＨ伸縮運動に起因するものと考えられる。概略６．７μｍ〜８．３μｍの赤外線ＩＲが吸収される領域Ｄは、ＣＨ₂変角振動に起因するものと考えられる。概略９．１μｍ〜１０．８μｍの赤外線ＩＲが吸収される領域Ｅは、Ｃ−Ｏ−Ｃの非対称伸縮振動に起因するものと考えられる。
このように、媒体Ｍは、３）概略２．８μｍ〜３．２μｍの赤外線ＩＲが吸収される領域Ｃと、４）概略６．７μｍ〜８．３μｍの赤外線ＩＲが吸収される領域Ｄと、５）概略９．１μｍ〜１０．８μｍの赤外線ＩＲが吸収される領域Ｅとを有する。 The region C in which the infrared IR of approximately 2.8 μm to 3.2 μm is absorbed is considered to be due to the OH stretching motion in the C-OH bond. The region D in which the infrared IR of approximately 6.7 μm to 8.3 μm is absorbed is considered to be caused by the _{CH 2 variable angular vibration.} It is considered that the region E in which the infrared IR of approximately 9.1 μm to 10.8 μm is absorbed is caused by the asymmetric expansion / contraction vibration of COC.
As described above, the medium M includes 3) a region C in which infrared IR of approximately 2.8 μm to 3.2 μm is absorbed, and 4) a region D in which infrared IR of approximately 6.7 μm to 8.3 μm is absorbed. 5) It has a region E in which infrared IR of approximately 9.1 μm to 10.8 μm is absorbed.

図３における領域Ａと図５における領域Ｃとは、多くの波長領域において重複する。このため、領域Ａと領域Ｃとで重複する概略２．８μｍ〜３．２μｍの赤外線ＩＲは、水及び媒体Ｍの両方に吸収され、水及び媒体Ｍの両方を加熱する。
図３における領域Ｂと図５における領域Ｄとは、多くの波長領域において重複する。このため、領域Ｂと領域Ｄとで重複する概略６．７μｍ〜７．７μｍの赤外線ＩＲは、水及び媒体Ｍに吸収され、水及び媒体Ｍの両方を加熱する。
このように、概略２．８μｍ〜３．２μｍの赤外線ＩＲ及び概略６．７μｍ〜７．７μｍの赤外線ＩＲは、水及び媒体Ｍの両方を加熱する赤外線ＩＲである。以降の説明では、概略２．８μｍ〜３．２μｍの赤外線ＩＲ及び概略６．７μｍ〜７．７μｍの赤外線ＩＲを、水及び媒体Ｍを加熱する赤外線ＩＲと称す。 The region A in FIG. 3 and the region C in FIG. 5 overlap in many wavelength regions. Therefore, the infrared IR of approximately 2.8 μm to 3.2 μm overlapping in the region A and the region C is absorbed by both the water and the medium M, and heats both the water and the medium M.
The region B in FIG. 3 and the region D in FIG. 5 overlap in many wavelength regions. Therefore, the infrared IR of approximately 6.7 μm to 7.7 μm overlapping in the region B and the region D is absorbed by the water and the medium M, and heats both the water and the medium M.
As described above, the infrared IR of approximately 2.8 μm to 3.2 μm and the infrared IR of approximately 6.7 μm to 7.7 μm are infrared IRs that heat both water and the medium M. In the following description, the infrared IR of approximately 2.8 μm to 3.2 μm and the infrared IR of approximately 6.7 μm to 7.7 μm are referred to as infrared IRs that heat water and the medium M.

一方、図５における領域Ｅは、媒体Ｍに吸収される赤外線であり、水に吸収されにくい赤外線である。このため、概略９．１μｍ〜１０．８μｍの赤外線ＩＲは、媒体Ｍに吸収され媒体Ｍを加熱し、水に吸収されにくく水を加熱しない。
このように、概略９．１μｍ〜１０．８μｍの赤外線ＩＲは、水の加熱に寄与せず、媒体Ｍだけを加熱する。以降の説明では、概略９．１μｍ〜１０．８μｍの赤外線ＩＲを、水の加熱に寄与しない余分な赤外線ＩＲと称す。 On the other hand, the region E in FIG. 5 is infrared rays that are absorbed by the medium M and are not easily absorbed by water. Therefore, the infrared IR of approximately 9.1 μm to 10.8 μm is absorbed by the medium M and heats the medium M, is not easily absorbed by water, and does not heat water.
As described above, the infrared IR of approximately 9.1 μm to 10.8 μm does not contribute to the heating of water and heats only the medium M. In the following description, the infrared IR of approximately 9.1 μm to 10.8 μm will be referred to as an extra infrared IR that does not contribute to the heating of water.

上述したように、加熱部３１から放射される赤外線ＩＲ、及び加熱部３１から放射され反射板３２によって反射される赤外線ＩＲは、カバー部材４９を通過し、第３支持面２３に支持される媒体Ｍに照射される。
本実施形態では、カバー部材４９は、炭素原子と酸素原子と炭素原子とが結合された部分を有する樹脂で構成されている。換言すれば、媒体Ｍの主成分がセルロースである場合、カバー部材４９は、炭素原子と酸素原子と炭素原子とが結合された部分を有する樹脂で構成されている。詳しくは、カバー部材４９は、カーボネート基を有するポリカーボネート樹脂、ポリエステル結合を有するポリエステル樹脂、アクリル基を有するアクリル樹脂、及びエポキシ樹脂のいずれかで構成される。 As described above, the infrared IR radiated from the heating unit 31 and the infrared IR radiated from the heating unit 31 and reflected by the reflector 32 pass through the cover member 49 and are supported by the third support surface 23. It is irradiated to M.
In the present embodiment, the cover member 49 is made of a resin having a portion in which a carbon atom, an oxygen atom, and a carbon atom are bonded. In other words, when the main component of the medium M is cellulose, the cover member 49 is made of a resin having a portion in which a carbon atom, an oxygen atom, and a carbon atom are bonded. Specifically, the cover member 49 is composed of any one of a polycarbonate resin having a carbonate group, a polyester resin having a polyester bond, an acrylic resin having an acrylic group, and an epoxy resin.

図６に示すように、ポリカーボネート樹脂は、一般式（−ＲＯ−Ｏ−ＣＯ−）ｎで表される直鎖状の樹脂ある。ポリカーボネート樹脂は、図中に破線で囲まれるように、炭素原子と酸素原子と炭素原子とが結合された部分を主鎖に有する。
さらに、カバー部材４９がポリカーボネート樹脂で構成される場合、カバー部材４９は、Ｃ−ＯＨ結合を有さず、ＯＨ伸縮運動に起因する赤外線ＩＲの吸収が生じない。 As shown in FIG. 6, the polycarbonate resin is a linear resin represented by the general formula (-RO-O-CO-) n. The polycarbonate resin has a portion in the main chain in which a carbon atom, an oxygen atom, and a carbon atom are bonded so as to be surrounded by a broken line in the figure.
Further, when the cover member 49 is made of a polycarbonate resin, the cover member 49 does not have a C-OH bond, and absorption of infrared IR due to the OH expansion / contraction motion does not occur.

ポリエステル樹脂は、一般式（−ＣＯ−Ｒ−ＣＯ−Ｏ−Ｒ’−Ｏ−）ｎで表される直鎖状の樹脂であり、炭素原子と酸素原子と炭素原子とが結合された部分を主鎖に有する。ポリエステル樹脂の一例として、例えば、ポリエチレンテレフタレート樹脂（ＰＥＴ樹脂）やポリブチレンテレフタレート樹脂（ＰＢＴ樹脂）などがあげられる。
図７に示すように、ポリエチレンテレフタレート樹脂は、図中に破線で囲まれるように、炭素原子と酸素原子と炭素原子とが結合された部分を主鎖に有する。さらに、カバー部材４９がポリエチレンテレフタレート樹脂で構成される場合、カバー部材４９は、Ｃ−ＯＨ結合を有さず、ＯＨ伸縮運動に起因する赤外線ＩＲの吸収が生じない。 The polyester resin is a linear resin represented by the general formula (-CO-R-CO-OR'-O-) n, and a portion in which a carbon atom, an oxygen atom, and a carbon atom are bonded is formed. It has in the main chain. Examples of the polyester resin include polyethylene terephthalate resin (PET resin) and polybutylene terephthalate resin (PBT resin).
As shown in FIG. 7, the polyethylene terephthalate resin has a portion in the main chain in which a carbon atom, an oxygen atom, and a carbon atom are bonded so as to be surrounded by a broken line in the figure. Further, when the cover member 49 is made of polyethylene terephthalate resin, the cover member 49 does not have a C-OH bond, and absorption of infrared IR due to the OH expansion / contraction movement does not occur.

図８に示すように、アクリル樹脂は、化学式（ＣＨ₂Ｃ（ＣＨ₃）（ＣＯＯＣＨ₃））ｎで表される直鎖状の樹脂である。アクリル樹脂は、図中に破線で囲まれるように、炭素原子と酸素原子と炭素原子とが結合された部分を側鎖に有する。
さらに、カバー部材４９がアクリル樹脂で構成される場合、カバー部材４９は、Ｃ−ＯＨ結合を有さず、ＯＨ伸縮運動に起因する赤外線ＩＲの吸収が生じない。 As shown in FIG. 8, the acrylic resin is a linear resin represented by _{the chemical formula (CH 2} C (CH ₃ ) (COOCH _{3)) n.} The acrylic resin has a portion in the side chain in which a carbon atom, an oxygen atom, and a carbon atom are bonded so as to be surrounded by a broken line in the figure.
Further, when the cover member 49 is made of an acrylic resin, the cover member 49 does not have a C—OH bond, and absorption of infrared IR due to the OH expansion / contraction motion does not occur.

エポキシ樹脂は、エポキシ基を２個以上含む化合物を重合することによって得られる樹脂であり、エポキシ基を複数持つプレポリマーのエポキシ基間で架橋ネットワーク化した樹脂である。
例えば、エポキシ樹脂の一例として、ビスフェノールＡ型エポキシ樹脂がある。図９に示すように、ビスフェノールＡ型エポキシ樹脂は、図中に破線で囲まれるように、炭素原子と酸素原子と炭素原子とが結合された部分を主鎖に有する。
図示を省略するが、エポキシ樹脂の一例として、ビスフェノールＦ型エポキシ樹脂、ビスフェノールＢＡ型エポキシ樹脂、ビスフェノールＡＤ型エポキシ樹脂、及び多官能エポキシ樹脂などがあげられる。これらエポキシ樹脂は、主鎖または側鎖に炭素原子と酸素原子と炭素原子とが結合された部分を有する。
さらに、カバー部材４９がエポキシ樹脂で構成される場合、カバー部材４９は、Ｃ−ＯＨ結合を有さず、ＯＨ伸縮運動に起因する赤外線ＩＲの吸収が生じない。 The epoxy resin is a resin obtained by polymerizing a compound containing two or more epoxy groups, and is a resin in which a crosslinked network is formed between the epoxy groups of a prepolymer having a plurality of epoxy groups.
For example, as an example of an epoxy resin, there is a bisphenol A type epoxy resin. As shown in FIG. 9, the bisphenol A type epoxy resin has a portion in the main chain in which a carbon atom, an oxygen atom, and a carbon atom are bonded so as to be surrounded by a broken line in the figure.
Although not shown, examples of the epoxy resin include bisphenol F type epoxy resin, bisphenol BA type epoxy resin, bisphenol AD type epoxy resin, and polyfunctional epoxy resin. These epoxy resins have a portion in which a carbon atom, an oxygen atom, and a carbon atom are bonded to a main chain or a side chain.
Further, when the cover member 49 is made of an epoxy resin, the cover member 49 does not have a C—OH bond, and absorption of infrared IR due to the OH expansion / contraction motion does not occur.

分子の分子式（構造式）が異なると、当該分子の固有振動が異なり、Ｃ−Ｏ−Ｃの非対称伸縮振動によって吸収される赤外線ＩＲの波長域が異なる。このため、カバー部材４９における炭素原子と酸素原子と炭素原子とが結合された部分が、媒体Ｍにおける炭素原子と酸素原子と炭素原子とが結合された部分に吸収される赤外線ＩＲを、完全に吸収することは難しい。しかしながら、カバー部材４９における炭素原子と酸素原子と炭素原子とが結合された部分は、媒体Ｍにおける炭素原子と酸素原子と炭素原子とが結合された部分に吸収される赤外線ＩＲの一部を吸収し、媒体Ｍにおける炭素原子と酸素原子と炭素原子とが結合された部分に吸収される赤外線ＩＲの強度を弱くすることができる。
すなわち、カバー部材４９における炭素原子と酸素原子と炭素原子とが結合された部分は、媒体Ｍに照射される水の加熱に寄与しない余分な赤外線ＩＲの強度を弱くすることができる。 When the molecular formula (structural formula) of a molecule is different, the natural vibration of the molecule is different, and the wavelength range of infrared IR absorbed by the asymmetric stretching vibration of COC is different. Therefore, the portion of the cover member 49 in which the carbon atom, the oxygen atom, and the carbon atom are bonded completely absorbs the infrared IR absorbed by the portion of the medium M in which the carbon atom, the oxygen atom, and the carbon atom are bonded. It is difficult to absorb. However, the portion of the cover member 49 in which the carbon atom, the oxygen atom, and the carbon atom are bonded absorbs a part of the infrared IR absorbed by the portion of the medium M in which the carbon atom, the oxygen atom, and the carbon atom are bonded. However, the intensity of the infrared IR absorbed in the portion where the carbon atom, the oxygen atom, and the carbon atom are bonded in the medium M can be weakened.
That is, the portion of the cover member 49 in which the carbon atom, the oxygen atom, and the carbon atom are bonded can weaken the intensity of the extra infrared IR that does not contribute to the heating of the water irradiated to the medium M.

媒体Ｍに照射される水の加熱に寄与しない余分な赤外線ＩＲの強度を弱くすると、水の加熱に悪影響を及ぼすことなく、媒体Ｍの加熱を抑制することができ、媒体Ｍの加熱温度を低くすることができる。仮に、媒体Ｍが過剰に加熱され、媒体Ｍの温度が高くなりすぎると、媒体Ｍの品質が低下し、媒体Ｍの変色や媒体Ｍの変形などの不具合が発生する。
カバー部材４９が炭素原子と酸素原子と炭素原子とが結合された部分を有する樹脂によって構成されると、媒体Ｍに照射される水の加熱に寄与しない余分な赤外線ＩＲの強度を弱くし、水の加熱に悪影響を及ぼすことなく、媒体Ｍの加熱温度を低くすることができるので、媒体Ｍが過剰に加熱され、媒体Ｍの品質が低下するという不具合を抑制することができる。 By weakening the intensity of the excess infrared IR that does not contribute to the heating of the water irradiated to the medium M, the heating of the medium M can be suppressed without adversely affecting the heating of the water, and the heating temperature of the medium M is lowered. can do. If the medium M is excessively heated and the temperature of the medium M becomes too high, the quality of the medium M deteriorates, and problems such as discoloration of the medium M and deformation of the medium M occur.
When the cover member 49 is made of a resin having a portion in which a carbon atom, an oxygen atom, and a carbon atom are bonded, the intensity of the extra infrared IR that does not contribute to the heating of the water irradiated to the medium M is weakened, and the water Since the heating temperature of the medium M can be lowered without adversely affecting the heating of the medium M, it is possible to suppress the problem that the medium M is excessively heated and the quality of the medium M is deteriorated.

さらに、カバー部材４９が、カーボネート基を有するポリカーボネート樹脂、ポリエステル結合を有するポリエステル樹脂、アクリル基を有するアクリル樹脂、及びエポキシ樹脂のいずれかで構成されると、当該カバー部材４９は、Ｃ−ＯＨ結合を有さず、ＯＨ伸縮運動に起因する赤外線ＩＲの吸収が生じない。すると、ＯＨ伸縮運動に起因する赤外線ＩＲが、カバー部材４９を通過し、媒体Ｍに照射されるようになり、ＯＨ伸縮運動に起因する赤外線ＩＲによって水が加熱されるようになるので、媒体Ｍの乾燥が阻害されず、媒体Ｍが適正に乾燥されるようになる。
従って、カバー部材４９が、カーボネート基を有するポリカーボネート樹脂、ポリエステル結合を有するポリエステル樹脂、アクリル基を有するアクリル樹脂、及びエポキシ樹脂のいずれかで構成されると、媒体Ｍを適正に乾燥させつつ、媒体Ｍが過剰に加熱され、媒体Ｍの品質が低下するという不具合を抑制することができる。 Further, when the cover member 49 is composed of any one of a polycarbonate resin having a carbonate group, a polyester resin having a polyester bond, an acrylic resin having an acrylic group, and an epoxy resin, the cover member 49 has a C-OH bond. And the absorption of infrared IR due to the OH expansion and contraction movement does not occur. Then, the infrared IR caused by the OH expansion / contraction movement passes through the cover member 49 and is irradiated to the medium M, and the water is heated by the infrared IR caused by the OH expansion / contraction movement. The drying of the medium M is not hindered, and the medium M is properly dried.
Therefore, when the cover member 49 is composed of any one of a polycarbonate resin having a carbonate group, a polyester resin having a polyester bond, an acrylic resin having an acrylic group, and an epoxy resin, the medium M is appropriately dried while being properly dried. It is possible to suppress the problem that M is excessively heated and the quality of the medium M is deteriorated.

上記実施形態は、以下のように変更して実施することができる。上記実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。 The above embodiment can be modified and implemented as follows. The above embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

ヘッド２５から吐出されるインクの溶剤は、水であることに限定されず、有機溶剤であってもよい。インクの溶剤が有機溶剤である場合、当該有機溶剤の加熱に寄与せず且つ媒体Ｍの加熱に寄与する赤外線ＩＲの強度を弱くすることが可能な材料で、カバー部材４９が構成されると、媒体Ｍを適正に乾燥させつつ、媒体Ｍが過剰に加熱され、媒体Ｍの品質が低下するという不具合を抑制することができる。
従って、インクの溶剤が有機溶剤である場合、カバー部材４９は、当該有機溶剤の加熱に寄与せず且つ媒体Ｍの加熱に寄与する赤外線ＩＲの強度を弱くすることが可能な材料で構成されることが好ましい。 The solvent of the ink ejected from the head 25 is not limited to water, and may be an organic solvent. When the solvent of the ink is an organic solvent, the cover member 49 is made of a material capable of weakening the intensity of the infrared IR that does not contribute to the heating of the organic solvent and contributes to the heating of the medium M. While properly drying the medium M, it is possible to suppress the problem that the medium M is excessively heated and the quality of the medium M is deteriorated.
Therefore, when the solvent of the ink is an organic solvent, the cover member 49 is made of a material capable of weakening the intensity of the infrared IR that does not contribute to the heating of the organic solvent and contributes to the heating of the medium M. Is preferable.

カバー部材４９は、セルロースを含む樹脂で構成されてもよく、セルロースナノファイバーを含む樹脂で構成されてもよく、植物由来の材料（セルロース）で製造されるセルロースフィルムであってよい。例えば、カバー部材４９は、植物の細胞壁の主成分であるセルロースで構成されるセロハン（登録商標）フィルムであってもよい。
カバー部材４９の構成材料がセルロースを含む場合、水の加熱に寄与しない余分な赤外線ＩＲが弱くなることに加えて、水及び媒体Ｍを加熱する赤外線ＩＲの強度も弱くなるので、水及び媒体Ｍを加熱する赤外線ＩＲの強度が過度に弱くならないように、カバー部材４９の膜厚は薄い方が好ましい。すなわち、カバー部材４９は、セルロースまたはセルロースナノファイバーを含む樹脂フィルムであることが好ましい。 The cover member 49 may be made of a resin containing cellulose, may be made of a resin containing cellulose nanofibers, or may be a cellulose film made of a plant-derived material (cellulose). For example, the cover member 49 may be a cellophane (registered trademark) film composed of cellulose, which is the main component of the cell wall of a plant.
When the constituent material of the cover member 49 contains cellulose, the intensity of the infrared IR that heats the water and the medium M is also weakened in addition to the weakening of the extra infrared IR that does not contribute to the heating of the water, so that the water and the medium M are weakened. It is preferable that the thickness of the cover member 49 is thin so that the intensity of the infrared IR for heating the cover member 49 is not excessively weakened. That is, the cover member 49 is preferably a resin film containing cellulose or cellulose nanofibers.

カバー部材４９が樹脂フィルムである場合、カバー部材４９の機械的強度が弱くなり、機械的衝撃によってカバー部材４９が破れるおそれがある。
この場合、加熱装置３０Ａの金網４９Ａ（図２参照）に、樹脂フィルムで構成されるカバー部材４９を貼り付ける構成が好ましい。加熱装置３０Ａの金網４９Ａに、樹脂フィルムで構成されるカバー部材４９を貼り付けると、カバー部材４９の機械的強度が強くなり、機械的衝撃によってカバー部材４９が破れにくくなる。 When the cover member 49 is a resin film, the mechanical strength of the cover member 49 is weakened, and the cover member 49 may be torn by a mechanical impact.
In this case, it is preferable to attach the cover member 49 made of a resin film to the wire mesh 49A (see FIG. 2) of the heating device 30A. When the cover member 49 made of a resin film is attached to the wire mesh 49A of the heating device 30A, the mechanical strength of the cover member 49 becomes stronger, and the cover member 49 is less likely to be torn by a mechanical impact.

媒体Ｍがセルロースで構成されるのでなく、媒体Ｍが樹脂で構成される場合、カバー部材４９は媒体Ｍと同じ樹脂で構成されることが好ましい。
例えば、媒体Ｍがポリエチレンテレフタレート樹脂（ＰＥＴ樹脂）からなるフィルムである場合、カバー部材４９はポリエチレンテレフタレート樹脂（ＰＥＴ樹脂）で構成されることが好ましい。例えば、媒体Ｍが塩化ビニル樹脂からなるフィルムである場合、カバー部材４９は塩化ビニル樹脂で構成されることが好ましい。例えば、媒体ＭがＰＰ（Polypropylene）樹脂からなるフィルムである場合、カバー部材４９はＰＰ（Polypropylene）樹脂で構成されることが好ましい。 When the medium M is not made of cellulose but the medium M is made of resin, it is preferable that the cover member 49 is made of the same resin as the medium M.
For example, when the medium M is a film made of polyethylene terephthalate resin (PET resin), the cover member 49 is preferably made of polyethylene terephthalate resin (PET resin). For example, when the medium M is a film made of a vinyl chloride resin, the cover member 49 is preferably made of a vinyl chloride resin. For example, when the medium M is a film made of PP (Polypropylene) resin, the cover member 49 is preferably made of PP (Polypropylene) resin.

カバー部材４９が媒体Ｍと同じ樹脂で構成されると、カバー部材４９が媒体Ｍと同じ波長域の赤外線ＩＲを吸収するので、カバー部材４９が媒体Ｍと同じ樹脂で構成されない場合と比べて、水の加熱に寄与せず媒体Ｍの加熱に寄与する余分な赤外線ＩＲの強度をより弱くし、当該樹脂で構成される媒体Ｍの過剰な加熱をより適正に抑制することができる。
もちろん、媒体Ｍに吐出されるインクの溶剤は有機溶剤であってもよい。媒体Ｍに吐出されるインクの溶剤が有機溶剤であっても、カバー部材４９が媒体Ｍと同じ樹脂で構成されると、カバー部材４９が媒体Ｍと同じ波長域の赤外線ＩＲを吸収するので、カバー部材４９が媒体Ｍと同じ樹脂で構成されない場合と比べて、有機溶剤の加熱に寄与せず媒体Ｍの加熱に寄与する余分な赤外線ＩＲの強度をより弱くし、当該樹脂で構成される媒体Ｍの過剰な加熱をより適正に抑制することができる。 When the cover member 49 is made of the same resin as the medium M, the cover member 49 absorbs infrared IR in the same wavelength range as the medium M, so that the cover member 49 is not made of the same resin as the medium M. The intensity of the extra infrared IR that does not contribute to the heating of water but contributes to the heating of the medium M can be further weakened, and the excessive heating of the medium M composed of the resin can be suppressed more appropriately.
Of course, the solvent of the ink discharged to the medium M may be an organic solvent. Even if the solvent of the ink discharged to the medium M is an organic solvent, if the cover member 49 is made of the same resin as the medium M, the cover member 49 absorbs infrared IR in the same wavelength range as the medium M. Compared with the case where the cover member 49 is not made of the same resin as the medium M, the intensity of the extra infrared IR that does not contribute to the heating of the organic solvent and contributes to the heating of the medium M is further weakened, and the medium made of the resin is used. Excessive heating of M can be suppressed more appropriately.

カバー部材４９はポリエチレンテレフタレート樹脂（ＰＥＴ樹脂）で構成される場合、カバー部材４９は塩化ビニル樹脂で構成される場合、カバー部材４９はＰＰ（Polypropylene）樹脂で構成される場合、カバー部材４９は、Ｃ−ＯＨ結合を有さず、ＯＨ伸縮運動に起因する赤外線ＩＲの吸収が生じない。すると、ＯＨ伸縮運動に起因する赤外線ＩＲが、カバー部材４９を通過し、媒体Ｍに照射されるようになり、ＯＨ伸縮運動に起因する赤外線ＩＲによって水が加熱されるので、媒体Ｍの乾燥が阻害されず、媒体Ｍが適正に乾燥されるようになる。 When the cover member 49 is made of polyethylene terephthalate resin (PET resin), the cover member 49 is made of vinyl chloride resin, the cover member 49 is made of PP (Polypropylene) resin, the cover member 49 is It does not have a C-OH bond and does not absorb infrared IR due to OH expansion and contraction movement. Then, the infrared IR caused by the OH expansion / contraction movement passes through the cover member 49 and is irradiated to the medium M, and the water is heated by the infrared IR caused by the OH expansion / contraction movement, so that the medium M is dried. The medium M will be properly dried without being hindered.

カバー部材４９は、ポリカーボネート樹脂と、ポリエステル樹脂と、アクリル樹脂と、エポキシ樹脂と、ポリエチレンテレフタレート樹脂と、塩化ビニル樹脂と、ＰＰ樹脂とから選択される複数の樹脂で構成されてもよい。例えば、カバー部材４９は、ポリカーボネート樹脂とポリエステル樹脂とで構成されてもよい。例えば、カバー部材４９がポリカーボネート樹脂とポリエステル樹脂とがエポキシ樹脂によって接合された構成であってもよい。
カバー部材４９は、上述した樹脂と、ガラスなどの他の基材とが組み合わされた構成であってもよい。例えば、カバー部材４９は、ポリカーボネート樹脂とガラス基板とが組み合わされた構成であってもよい。例えば、カバー部材４９は、一対のガラス基板がエポキシ樹脂によって接合された構成であってもよい。 The cover member 49 may be composed of a plurality of resins selected from a polycarbonate resin, a polyester resin, an acrylic resin, an epoxy resin, a polyethylene terephthalate resin, a vinyl chloride resin, and a PP resin. For example, the cover member 49 may be made of a polycarbonate resin and a polyester resin. For example, the cover member 49 may have a structure in which a polycarbonate resin and a polyester resin are joined by an epoxy resin.
The cover member 49 may have a configuration in which the above-mentioned resin and another base material such as glass are combined. For example, the cover member 49 may have a configuration in which a polycarbonate resin and a glass substrate are combined. For example, the cover member 49 may have a structure in which a pair of glass substrates are joined by an epoxy resin.

カバー部材４９は、水の加熱に寄与しない余分な赤外線ＩＲを吸収する特定波長吸収色素を含んでもよい。例えば、カバー部材４９は、特定波長吸収色素を含むカーボネート樹脂で構成されてもよく、特定波長吸収色素を含むポリエステル樹脂で構成されてもよく、特定波長吸収色素を含むアクリル樹脂で構成されてもよく、特定波長吸収色素を含むエポキシ樹脂で構成されてもよい。
カバー部材４９が水の加熱に寄与しない余分な赤外線ＩＲを吸収する特定波長吸収色素を含むと、媒体Ｍに照射される水の加熱に寄与しない余分な赤外線ＩＲの強度がさらに弱くなり、媒体Ｍが過剰に加熱され、媒体Ｍの品質が低下するという不具合がさらに生じにくくなる。 The cover member 49 may contain a specific wavelength absorbing dye that absorbs excess infrared IR that does not contribute to the heating of water. For example, the cover member 49 may be made of a carbonate resin containing a specific wavelength absorbing dye, may be made of a polyester resin containing a specific wavelength absorbing dye, or may be made of an acrylic resin containing a specific wavelength absorbing dye. It may be composed of an epoxy resin containing a specific wavelength absorbing dye.
When the cover member 49 contains a specific wavelength absorbing dye that absorbs the extra infrared IR that does not contribute to the heating of water, the intensity of the extra infrared IR that does not contribute to the heating of the water irradiated to the medium M is further weakened, and the medium M becomes weaker. Is excessively heated, and the problem that the quality of the medium M is deteriorated is less likely to occur.

カバー部材４９は、屈折率が異なる誘電体膜が積層された誘電体多層膜で覆われていてもよい。詳しくは、水の加熱に寄与する赤外線ＩＲを透過させ、水の加熱に寄与しない余分な赤外線ＩＲがカバー部材４９を通過させない誘電体多層膜によって、カバー部材４９が覆われる構成であってもよい。
当該誘電体多層膜によってカバー部材４９が覆われると、水の加熱に寄与する赤外線ＩＲがカバー部材４９を通過し、水の加熱に寄与しない余分な赤外線ＩＲがカバー部材４９を通過しなくなるので、媒体Ｍが過剰に加熱され、媒体Ｍの品質が低下するという不具合を抑制しつつ、水を加熱し、媒体Ｍを適正に乾燥することができる。 The cover member 49 may be covered with a dielectric multilayer film in which dielectric films having different refractive indexes are laminated. Specifically, the cover member 49 may be covered with a dielectric multilayer film that allows infrared IR that contributes to heating water to pass through and does not allow extra infrared IR that does not contribute to heating water to pass through the cover member 49. ..
When the cover member 49 is covered with the dielectric multilayer film, the infrared IR that contributes to the heating of water passes through the cover member 49, and the extra infrared IR that does not contribute to the heating of water does not pass through the cover member 49. The water can be heated and the medium M can be properly dried while suppressing the problem that the medium M is excessively heated and the quality of the medium M is deteriorated.

１…記録装置、１２…収容体、１３…支持部、１４…搬送部、１５…記録部、１６…第１支持板、１７…第２支持板、１８…第３支持板、２１…第１支持面、２２…第２支持面、２３…第３支持面、２４…搬送ローラー、２５…ヘッド、２６…キャリッジ、２７…ガイド軸、３０…加熱装置、３１…加熱部、３２…反射板、４０…流路部材、４１…第１部材、４１ａ…第１部分、４１ｂ…第２部分、４１ｃ…第３部分、４２…第２部材、４４…吸い込み口、４５…吹き出し口、４６…送風ファン、４７…凹部、４８…開口、４９…カバー部材、５０…気体の流路、５０ａ…第１部分、５０ｂ…第２部分、５０ｃ…第３部分。 1 ... Recording device, 12 ... Accommodator, 13 ... Support part, 14 ... Transport part, 15 ... Recording part, 16 ... First support plate, 17 ... Second support plate, 18 ... Third support plate, 21 ... First Support surface, 22 ... 2nd support surface, 23 ... 3rd support surface, 24 ... Conveyor roller, 25 ... Head, 26 ... Carriage, 27 ... Guide shaft, 30 ... Heating device, 31 ... Heating unit, 32 ... Reflector, 40 ... Flow path member, 41 ... First member, 41a ... First part, 41b ... Second part, 41c ... Third part, 42 ... Second member, 44 ... Suction port, 45 ... Blowout port, 46 ... Blower fan , 47 ... concave, 48 ... opening, 49 ... cover member, 50 ... gas flow path, 50a ... first part, 50b ... second part, 50c ... third part.

Claims

An image is formed by ejecting a liquid, and a heating device that heats a medium supported by a support surface.
A heating unit that is arranged to face the support surface and heats the medium in a non-contact manner.
A reflector that reflects infrared rays radiated from the heating unit to the medium,
It has a suction port, an outlet, a gas flow path arranged between the suction port and the outlet, and a recess that opens to the support surface side and houses the heating portion and the reflector. Then, the flow path member arranged on the side opposite to the support surface with respect to the heating portion,
A cover member arranged so as to cover the opening,
A blower unit that generates an air flow in the flow path of the gas so that the gas is sucked in from the suction port and the gas is blown out from the outlet to the support surface and the cover member.
Including
The heating device is characterized in that the cover member is arranged so as to cover 80% or more of the opening.

The heating device according to claim 1, wherein when the main component of the medium is cellulose, the cover member is made of a resin having a portion in which a carbon atom, an oxygen atom, and a carbon atom are bonded.

The resin having a portion in which a carbon atom, an oxygen atom, and a carbon atom are bonded is one of a polycarbonate resin having a carbonate group, a polyester resin having a polyester bond, an acrylic resin having an acrylic group, and an epoxy resin. 2. The heating device according to claim 2.

The heating device according to claim 1, wherein when the medium is made of a resin, the cover member is made of the same resin as the resin constituting the medium.