JP2021045940A - Image formation apparatus - Google Patents

Image formation apparatus Download PDF

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Publication number
JP2021045940A
JP2021045940A JP2019171472A JP2019171472A JP2021045940A JP 2021045940 A JP2021045940 A JP 2021045940A JP 2019171472 A JP2019171472 A JP 2019171472A JP 2019171472 A JP2019171472 A JP 2019171472A JP 2021045940 A JP2021045940 A JP 2021045940A
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Prior art keywords
support member
image forming
forming apparatus
belt
width direction
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JP7383950B2 (en
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泰希 松本
Yasuki Matsumoto
泰希 松本
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Konica Minolta Inc
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Konica Minolta Inc
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
    • G03G15/1615—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support relating to the driving mechanism for the intermediate support, e.g. gears, couplings, belt tensioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2002/012—Ink jet with intermediate transfer member
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1654—Locks and means for positioning or alignment

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Ink Jet (AREA)
  • Handling Of Sheets (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

To provide an image formation apparatus which can ensure the flatness of a belt member with a simple configuration.SOLUTION: An image formation apparatus comprises: an endless belt member; an image formation part which is arranged so as to face the belt member and forms an image in an image formation region facing the belt member; a support member which extends in the width direction of the belt member and supports the entire width direction of the belt member at a spot corresponding to the image formation region of the belt member; and a pulling part which pulls the end of the support member toward the outer side of the belt member.SELECTED DRAWING: Figure 3

Description

本発明は、画像形成装置に関する。 The present invention relates to an image forming apparatus.

無端状のベルト部材と、ベルト部材と対向する画像形成領域に画像を形成する画像形成部とを有する画像形成装置が知られている。例えば、特許文献１には、ベルト部材における画像形成領域に対応する範囲を２つのローラー部材で支持する構成が開示されている。この構成では、これにより、当該範囲におけるベルト部材と画像形成部とのギャップを調整する際に、ベルト部材のテンションの変動を抑制している。 An image forming apparatus having an endless belt member and an image forming portion for forming an image in an image forming region facing the belt member is known. For example, Patent Document 1 discloses a configuration in which a range corresponding to an image forming region in a belt member is supported by two roller members. In this configuration, this suppresses fluctuations in the tension of the belt member when adjusting the gap between the belt member and the image forming portion in the range.

特開平８−１５６３５３号公報Japanese Unexamined Patent Publication No. 8-156353

ところで、特許文献１に記載の構成では、ローラー部材の軸方向の両端部分が装置の所定部分に固定支持される。ローラー部材の両端部分が固定支持されることで、ローラー部材の軸方向の中央部分が自重により下がるので、ローラー部材が、当該中央部分が撓んだ状態に変形し、ベルト部材もそれに応じて撓むおそれがある。その結果、ベルト部材の平面性が担保できなくなり、ひいてはベルト部材と画像形成部とのギャップを精度良く調整できないおそれがある。また、このベルト部材の撓みを解消するために、調整機構を設けると構成が複雑になるおそれがある。 By the way, in the configuration described in Patent Document 1, both end portions of the roller member in the axial direction are fixedly supported by predetermined portions of the device. Since both end portions of the roller member are fixedly supported, the central portion in the axial direction of the roller member is lowered by its own weight, so that the roller member is deformed to a state in which the central portion is bent, and the belt member is also flexed accordingly. There is a risk of swelling. As a result, the flatness of the belt member cannot be ensured, and the gap between the belt member and the image forming portion may not be adjusted accurately. Further, if an adjusting mechanism is provided in order to eliminate the bending of the belt member, the configuration may become complicated.

本発明の目的は、簡易な構成によりベルト部材の平面性を担保することが可能な画像形成装置を提供することである。 An object of the present invention is to provide an image forming apparatus capable of ensuring the flatness of a belt member by a simple configuration.

本発明に係る画像形成装置は、
無端状のベルト部材と、
前記ベルト部材と対向配置され、前記ベルト部材と対向する画像形成領域に画像を形成する画像形成部と、
前記ベルト部材の幅方向に延び、前記ベルト部材の前記画像形成領域に対応する箇所において前記ベルト部材の前記幅方向全体を支持する支持部材と、
前記支持部材の端部を前記ベルト部材の外側に向けて引っ張る引っ張り部と、
を備える。 The image forming apparatus according to the present invention is
Endless belt member and
An image forming portion that is arranged to face the belt member and forms an image in an image forming region facing the belt member.
A support member extending in the width direction of the belt member and supporting the entire width direction of the belt member at a portion corresponding to the image forming region of the belt member.
A pulling portion that pulls the end portion of the support member toward the outside of the belt member, and a pulling portion.
To be equipped.

本発明によれば、簡易な構成によりベルト部材の平面性を担保することができる。 According to the present invention, the flatness of the belt member can be ensured by a simple structure.

本発明の実施の形態に係る画像形成装置の概略構成を示す図である。It is a figure which shows the schematic structure of the image forming apparatus which concerns on embodiment of this invention. 画像形成装置の主要な機能構成を示すブロック図である。It is a block diagram which shows the main functional composition of an image forming apparatus. 支持部材の端部付近の拡大図である。It is an enlarged view near the end portion of a support member. 従来例における支持部材の撓み変形の様子を説明する図である。It is a figure explaining the state of bending deformation of a support member in a conventional example. 本実施の形態に係る支持部材の撓み変形の様子を説明するための図である。It is a figure for demonstrating the state of bending deformation of the support member which concerns on this embodiment. 支持部材におけるネジ部材の固定箇所を変更した例を示す図である。It is a figure which shows the example which changed the fixing part of the screw member in a support member. 支持部材の形状を変更した例を示す図である。It is a figure which shows the example which changed the shape of the support member. 支持部材の形状を変更した例を示す図である。It is a figure which shows the example which changed the shape of the support member. 支持部材の形状を変更した例を示す図である。It is a figure which shows the example which changed the shape of the support member. 支持部材の第１端部のみを引っ張る構成の一例を示す図である。It is a figure which shows an example of the structure which pulls only the 1st end part of a support member. 引っ張り部をエアーシリンダーとした構成の一例を示す図である。It is a figure which shows an example of the structure which made the pulling part an air cylinder. 引っ張り部が付勢部材を含む構成の一例を示す図である。It is a figure which shows an example of the structure which the pulling part includes an urging member.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。図１は、本発明の実施の形態に係る画像形成装置１の概略構成を示す図である。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of an image forming apparatus 1 according to an embodiment of the present invention.

図１に示すように、画像形成装置１は、インクジェット方式の画像形成装置であり、ベルト搬送装置２、記録ヘッド３および支持部材４等を備えている。 As shown in FIG. 1, the image forming apparatus 1 is an inkjet type image forming apparatus, and includes a belt conveying device 2, a recording head 3, a support member 4, and the like.

ベルト搬送装置２には、所定の間隔をおいて平行に配置された駆動ローラー２１および従動ローラー２２に亘って所定幅の無端状の搬送ベルト２３が張架されている。駆動ローラー２１および従動ローラー２２に架け渡された搬送ベルト２３の上面は、記録媒体Ｐを密着させて載置する載置面とされている。搬送ベルト２３は、本発明の「ベルト部材」に対応する。 In the belt transport device 2, an endless transport belt 23 having a predetermined width is stretched over a drive roller 21 and a driven roller 22 arranged in parallel at a predetermined interval. The upper surface of the transport belt 23 spanned by the drive roller 21 and the driven roller 22 is a mounting surface on which the recording medium P is placed in close contact with the transport belt 23. The conveyor belt 23 corresponds to the "belt member" of the present invention.

なお、搬送ベルト２３の表面には、搬送中の記録媒体Ｐを搬送ベルト２３の上面に密着させるために、地張りと呼ばれる粘着剤が塗布されている。また、駆動ローラー２１は、図示しない副走査モーターによって駆動される。 The surface of the transport belt 23 is coated with an adhesive called grounding in order to bring the recording medium P being transported into close contact with the upper surface of the transport belt 23. Further, the drive roller 21 is driven by a sub-scanning motor (not shown).

ベルト搬送装置２では、駆動ローラー２１が副走査モーターの回転駆動によって、図１中の反時計方向（矢印を参照）に所定速度で回転することにより、従動ローラー２２との間に架け渡された搬送ベルト２３を回転移動させる。かかる動作により、搬送ベルト２３の上面に載置されている記録媒体Ｐは、副走査方向である図中の矢印Ａ方向に向けて搬送される。 In the belt transfer device 2, the drive roller 21 is rotated at a predetermined speed in the counterclockwise direction (see the arrow) in FIG. 1 by the rotational drive of the sub-scanning motor, so that the drive roller 21 is bridged with the driven roller 22. The conveyor belt 23 is rotated and moved. By such an operation, the recording medium P mounted on the upper surface of the transport belt 23 is transported in the direction of the arrow A in the drawing, which is the sub-scanning direction.

記録媒体Ｐには、例えば、紙、布帛、プラスチックフィルム、ガラス板等、インクジェット記録に通常使用される記録媒体を使用することができる。記録媒体Ｐは、所定サイズに裁断されたシート状であってもよいし、ロール状に巻回された元巻から連続して繰り出される長尺状であってもよい。 As the recording medium P, for example, a recording medium usually used for inkjet recording such as paper, cloth, a plastic film, and a glass plate can be used. The recording medium P may be in the form of a sheet cut to a predetermined size, or may be in the form of a long piece that is continuously unwound from the original winding wound in a roll shape.

なお、ベルト搬送装置２における記録媒体Ｐの搬送面とは反対側には、図示しないベルトクリーニング装置が設けられている。このベルトクリーニング装置によって、搬送ベルト２３に付着した異物が除去される。 A belt cleaning device (not shown) is provided on the side of the belt transport device 2 opposite to the transport surface of the recording medium P. The belt cleaning device removes foreign matter adhering to the transport belt 23.

記録ヘッド３は、複数のインクジェットヘッドを有しており、搬送ベルト２３上の記録媒体Ｐが載置される面の上方に所定の間隔をおいて対向配置されている。記録ヘッド３は、その下面に設けられた多数のノズルからインク滴を、所定の画像形成領域に吐出する。 The recording head 3 has a plurality of inkjet heads, and is arranged so as to face each other on the transport belt 23 above the surface on which the recording medium P is placed at a predetermined interval. The recording head 3 ejects ink droplets to a predetermined image forming region from a large number of nozzles provided on the lower surface thereof.

所定の画像形成領域は、記録ヘッド３と搬送ベルト２３との対向部分の領域である。搬送ベルト２３の搬送方向における、所定の画像形成領域の長さは、当該搬送方向における、記録ヘッド３の長さに対応する。 The predetermined image forming region is the region of the opposite portion between the recording head 3 and the transport belt 23. The length of the predetermined image forming region in the transport direction of the transport belt 23 corresponds to the length of the recording head 3 in the transport direction.

記録ヘッド３は、搬送ベルト２３の回転移動によって搬送されて上記画像形成領域を通過する記録媒体Ｐ上に所望の画像を記録する。記録ヘッド３は、本発明の「画像形成部」に対応する。 The recording head 3 records a desired image on the recording medium P which is conveyed by the rotational movement of the conveying belt 23 and passes through the image forming region. The recording head 3 corresponds to the "image forming unit" of the present invention.

本実施の形態では、記録ヘッド３は、図示しないキャリッジに搭載されて、間欠的に搬送される記録媒体Ｐの搬送方向と直交する主査方向に往復移動するシャトル型の記録ヘッドが用いられる。この場合、記録時に、搬送ベルト２３は、待機状態と駆動状態を繰り返す間欠動作を行うように、駆動ローラー２１の駆動が制御される。 In the present embodiment, the recording head 3 is a shuttle type recording head mounted on a carriage (not shown) and reciprocating in the chief examiner direction orthogonal to the conveying direction of the recording medium P which is intermittently conveyed. In this case, at the time of recording, the drive of the drive roller 21 is controlled so that the transfer belt 23 performs an intermittent operation of repeating the standby state and the drive state.

なお、記録ヘッド３は、搬送ベルト２３の幅方向に亘って固定状に架け渡され、連続的に搬送される記録媒体Ｐ上にインク滴を吐出することによって画像を記録するライン型の記録ヘッドであってもよい。この場合、記録時に、搬送ベルト２３は、連続的に移動（回転動作）するように、駆動ローラー２１の駆動が制御される。 The recording head 3 is a line-type recording head that is fixedly bridged over the width direction of the transport belt 23 and records an image by ejecting ink droplets on a recording medium P that is continuously transported. It may be. In this case, at the time of recording, the drive of the drive roller 21 is controlled so that the transfer belt 23 continuously moves (rotates).

支持部材４は、搬送ベルト２３の内側から、搬送ベルト２３における画像形成領域に対応する箇所を支持する部材である。支持部材４は、搬送方向において、画像形成領域よりも上流側と、画像形成領域よりも下流側との２箇所に設けられている。支持部材４の詳細については後述する。 The support member 4 is a member that supports a portion of the transport belt 23 corresponding to an image forming region from the inside of the transport belt 23. The support members 4 are provided at two locations in the transport direction, one on the upstream side of the image forming region and the other on the downstream side of the image forming region. Details of the support member 4 will be described later.

また、搬送ベルト２３の内側における、支持部材４とは反対側には、テンションローラー５が設けられている。テンションローラー５は、搬送ベルト２３に張力を付与するローラーである。なお、搬送ベルト２３の内側に設けられるローラーは、搬送ベルト２３の蛇行を補正するローラーであっても良い。 Further, a tension roller 5 is provided on the inside of the transport belt 23 on the side opposite to the support member 4. The tension roller 5 is a roller that applies tension to the transport belt 23. The roller provided inside the transport belt 23 may be a roller that corrects the meandering of the transport belt 23.

図２は、画像形成装置１の主要な機能構成を示すブロック図である。画像形成装置１は、制御部１００、記録ヘッド駆動部１１０、搬送駆動部１２０および入出力インターフェース１３０を備える。 FIG. 2 is a block diagram showing a main functional configuration of the image forming apparatus 1. The image forming apparatus 1 includes a control unit 100, a recording head drive unit 110, a transport drive unit 120, and an input / output interface 130.

制御部１００は、ＣＰＵ１０１（Central Processing Unit）、ＲＡＭ１０２（Random Access Memory）、ＲＯＭ１０３（Read Only Memory）および記憶部１０４を有する。 The control unit 100 includes a CPU 101 (Central Processing Unit), a RAM 102 (Random Access Memory), a ROM 103 (Read Only Memory), and a storage unit 104.

ＣＰＵ１０１は、ＲＯＭ１０３に記憶された各種制御用のプログラムや設定データを読み出してＲＡＭ１０２に記憶させ、当該プログラムを実行して各種の演算処理を行う。また、ＣＰＵ１０１は、画像形成装置１の全体動作を統括的に制御する。 The CPU 101 reads out various control programs and setting data stored in the ROM 103, stores them in the RAM 102, executes the programs, and performs various arithmetic processes. Further, the CPU 101 comprehensively controls the overall operation of the image forming apparatus 1.

ＲＡＭ１０２は、ＣＰＵ１０１に作業用のメモリー空間を提供し、一時データを記憶する。なお、ＲＡＭ１０２は、不揮発性メモリーを含んでいても良い。 The RAM 102 provides the CPU 101 with a working memory space and stores temporary data. The RAM 102 may include a non-volatile memory.

ＲＯＭ１０３は、ＣＰＵ１０１により実行される各種制御用のプログラムや設定データ等を格納する。なお、ＲＯＭ１０３に代えて、ＥＥＰＲＯＭ（Electrically Erasable Programmable Read Only Memory）やフラッシュメモリー等の書き換え可能な不揮発性メモリーが用いられても良い。 The ROM 103 stores various control programs, setting data, and the like executed by the CPU 101. Instead of the ROM 103, a rewritable non-volatile memory such as an EEPROM (Electrically Erasable Programmable Read Only Memory) or a flash memory may be used.

記憶部１０４には、入出力インターフェース１３０を介して外部装置１４０から入力されたプリントジョブ（画像記録命令）および当該プリントジョブに係る画像データが記憶される。記憶部１０４としては、例えばＨＤＤ（Hard Disk Drive）が用いられ、また、ＤＲＡＭ（Dynamic Random Access Memory）等が併用されても良い。 The storage unit 104 stores a print job (image recording command) input from the external device 140 via the input / output interface 130 and image data related to the print job. As the storage unit 104, for example, an HDD (Hard Disk Drive) may be used, or a DRAM (Dynamic Random Access Memory) or the like may be used in combination.

記録ヘッド駆動部１１０は、制御部１００の制御に基づいて記録ヘッド３に対して適切なタイミングで画像データに応じた駆動信号を供給することにより、記録ヘッド３のノズルから画像データの画素値に応じた量のインクを吐出させる。 The recording head drive unit 110 supplies a drive signal according to the image data to the recording head 3 at an appropriate timing based on the control of the control unit 100, thereby converting the pixel value of the image data from the nozzle of the recording head 3. Discharge the corresponding amount of ink.

搬送駆動部１２０は、制御部１００の制御に基づいて駆動ローラー２１の副走査モーターに駆動信号を供給することにより、搬送ベルト２３を所定の速度およびタイミングで回転移動させる。 The transport drive unit 120 rotates and moves the transport belt 23 at a predetermined speed and timing by supplying a drive signal to the sub-scanning motor of the drive roller 21 based on the control of the control unit 100.

入出力インターフェース１３０は、外部装置１４０と制御部１００との間におけるデータの送受信を媒介する。入出力インターフェース１３０は、例えば各種シリアルインターフェース、各種パラレルインターフェースの何れか、または、これらの組み合わせで構成される。 The input / output interface 130 mediates the transmission / reception of data between the external device 140 and the control unit 100. The input / output interface 130 is composed of, for example, any of various serial interfaces, various parallel interfaces, or a combination thereof.

外部装置１４０は、例えばパーソナルコンピューターであり、入出力インターフェース１３０を介して画像記録命令（プリントジョブ）および画像データ等を制御部１００に供給する。 The external device 140 is, for example, a personal computer, and supplies an image recording command (print job), image data, and the like to the control unit 100 via the input / output interface 130.

次に、支持部材４の詳細について説明する。図３は、支持部材４の端部付近の拡大図である。なお、図３における左右方向は、搬送ベルト２３の幅方向である。 Next, the details of the support member 4 will be described. FIG. 3 is an enlarged view of the vicinity of the end portion of the support member 4. The left-right direction in FIG. 3 is the width direction of the transport belt 23.

図３に示すように、支持部材４は、搬送ベルト２３の幅方向に延びる四角柱形状の金属部材（例えば、アルミ）であり、搬送ベルト２３の内側から搬送ベルト２３の幅方向全体を支持している。なお、支持部材４周辺の構成は、幅方向の両側において対称構成であるので、図３では、支持部材４の一方側の端部（図３の右端部）のみ図示し、支持部材４の他方側の端部の図示および説明を省略している。 As shown in FIG. 3, the support member 4 is a square pillar-shaped metal member (for example, aluminum) extending in the width direction of the transport belt 23, and supports the entire width direction of the transport belt 23 from the inside of the transport belt 23. ing. Since the configuration around the support member 4 is symmetrical on both sides in the width direction, only one end of the support member 4 (right end in FIG. 3) is shown in FIG. 3, and the other end of the support member 4 is shown. The illustration and description of the side end are omitted.

支持部材４の端部４Ａは、画像形成装置１における搬送ベルト２３の幅方向の両側、つまり、支持部材４の端部４Ａの外側に設けられる側壁６に固定されている。支持部材４は、四角柱における四角形の平面となる部分が、搬送ベルト２３と対向するように配置される。側壁６は、本発明の「固定部材」に対応する。 The end portions 4A of the support member 4 are fixed to both sides of the transport belt 23 in the image forming apparatus 1 in the width direction, that is, to the side walls 6 provided outside the end portion 4A of the support member 4. The support member 4 is arranged so that a quadrangular flat portion of the quadrangular prism faces the transport belt 23. The side wall 6 corresponds to the "fixing member" of the present invention.

支持部材４の端部４Ａには、ネジ部材７を挿通可能な孔４Ｂが形成されている。また、側壁６にも、ネジ部材７を挿通可能な孔６Ａが形成されている。ネジ部材７は、側壁６を介して、支持部材４の孔４Ｂに挿通されることで、側壁６に支持部材４の端部４Ａを固定する。つまり、支持部材４の端部４Ａは、側壁６およびネジ部材７に固定支持されている。 A hole 4B through which the screw member 7 can be inserted is formed in the end portion 4A of the support member 4. Further, the side wall 6 is also formed with a hole 6A through which the screw member 7 can be inserted. The screw member 7 is inserted into the hole 4B of the support member 4 via the side wall 6 to fix the end portion 4A of the support member 4 to the side wall 6. That is, the end portion 4A of the support member 4 is fixedly supported by the side wall 6 and the screw member 7.

このように固定されることで、支持部材４の端部４Ａは、搬送ベルト２３の幅方向の外側に向けて引っ張られる（矢印参照）。具体的には、側壁６は、画像形成装置１において移動不能な部分であるので、ネジ部材７を支持部材４の端部４Ａに挿通することで、移動しない側壁６およびネジ部材７に対して支持部材４が相対的に側壁６側に移動する。すなわち、支持部材４には、側壁６およびネジ部材７により、側壁６側に引っ張られる荷重が付与される。側壁６およびネジ部材７は、本発明の「引っ張り部」に対応する。 By being fixed in this way, the end portion 4A of the support member 4 is pulled toward the outside in the width direction of the transport belt 23 (see the arrow). Specifically, since the side wall 6 is a portion that cannot be moved in the image forming apparatus 1, by inserting the screw member 7 into the end portion 4A of the support member 4, the side wall 6 and the screw member 7 that do not move can be removed. The support member 4 moves relatively toward the side wall 6. That is, a load pulled toward the side wall 6 is applied to the support member 4 by the side wall 6 and the screw member 7. The side wall 6 and the screw member 7 correspond to the "pulled portion" of the present invention.

上記したように、支持部材４付近の構成は、幅方向の両側において対称構成であるので、支持部材４の両端部は、側壁６およびネジ部材７により互いに反対側に引っ張られる。言い換えると、幅方向における支持部材４の第１端部（例えば、図３の右端部）、および、幅方向における支持部材４の第２端部（例えば、図３の図示しない左端部）は、それぞれに対応する側壁６およびネジ部材７により、互いに反対側に引っ張られる。 As described above, since the configuration near the support member 4 is symmetrical on both sides in the width direction, both ends of the support member 4 are pulled to the opposite sides by the side wall 6 and the screw member 7. In other words, the first end portion of the support member 4 in the width direction (for example, the right end portion in FIG. 3) and the second end portion of the support member 4 in the width direction (for example, the left end portion (not shown in FIG. 3)) are The side walls 6 and the screw members 7 corresponding to each are pulled to the opposite sides of each other.

例えば、図４に示すように、所定の支持部材１０の両端部を固定支持する構成があったとする。このような構成では、支持部材１０の幅方向の中央部が自重により下がるので、支持部材１０が、中央部が撓んだ状態に変形する。そのため、支持部材１０に支持されるベルト部材１１もその撓みに応じて撓むおそれがあるので、ベルト部材１１の平面性を担保できないおそれがある。そのため、ベルト部材１１と画像形成部とのギャップを調整する際において、当該ギャップを精度良く調整できなくなる。 For example, as shown in FIG. 4, it is assumed that there is a configuration in which both ends of a predetermined support member 10 are fixedly supported. In such a configuration, since the central portion of the support member 10 in the width direction is lowered by its own weight, the support member 10 is deformed into a state in which the central portion is bent. Therefore, the belt member 11 supported by the support member 10 may also bend according to the bending, so that the flatness of the belt member 11 may not be ensured. Therefore, when adjusting the gap between the belt member 11 and the image forming portion, the gap cannot be adjusted accurately.

また、この支持部材１０の撓みを解消するために、例えば、撓みを調整可能な調整機構を設ける構成が考えられるが、このような構成であると、装置の構成が全体として複雑になるおそれがある。 Further, in order to eliminate the bending of the support member 10, for example, a configuration in which an adjusting mechanism capable of adjusting the bending is provided is conceivable, but such a configuration may complicate the configuration of the device as a whole. is there.

それに対し、本実施の形態では、図５に示すように、支持部材４の端部４Ａが搬送ベルト２３の幅方向の外側に向けて引っ張られる。その結果、支持部材４の幅方向の中央部が自重により下がることに起因する、支持部材４の中央部の撓み量が低減される。つまり、側壁６およびネジ部材７が、支持部材４の中央部の撓み変形を矯正するように、支持部材４の端部４Ａを引っ張るので、搬送ベルト２３が支持部材４の撓みに応じて撓むことを低減することができる。 On the other hand, in the present embodiment, as shown in FIG. 5, the end portion 4A of the support member 4 is pulled toward the outside in the width direction of the transport belt 23. As a result, the amount of deflection of the central portion of the support member 4 due to the lowering of the central portion of the support member 4 in the width direction due to its own weight is reduced. That is, since the side wall 6 and the screw member 7 pull the end portion 4A of the support member 4 so as to correct the bending deformation of the central portion of the supporting member 4, the transport belt 23 bends according to the bending of the support member 4. That can be reduced.

すなわち、本実施の形態では、搬送ベルト２３の平面性を担保することができる。その結果、画像形成領域を通過する記録媒体Ｐ上に所望の画像を形成することができるとともに、搬送ベルト２３と記録ヘッド３とのギャップを調整する際において、当該ギャップを精度良く調整することができる。 That is, in the present embodiment, the flatness of the transport belt 23 can be ensured. As a result, a desired image can be formed on the recording medium P passing through the image forming region, and when adjusting the gap between the transport belt 23 and the recording head 3, the gap can be adjusted with high accuracy. it can.

また、支持部材４に引っ張り荷重が付与されることから、調整機構を設ける必要がないので、簡易な構成とすることができる。また、調整機構を設ける必要がないので、装置の省スペース化、コストダウンを図ることができる。 Further, since the support member 4 is subjected to a tensile load, it is not necessary to provide an adjusting mechanism, so that the configuration can be simplified. Moreover, since it is not necessary to provide an adjustment mechanism, it is possible to save space and reduce costs of the device.

また、支持部材４の両端部がネジ部材７により側壁６に固定されるので、支持部材４が回転不能なように固定されることとなる。 Further, since both ends of the support member 4 are fixed to the side wall 6 by the screw member 7, the support member 4 is fixed so as not to rotate.

支持部材４が回転可能に固定されていると、支持部材４が回転することにより、搬送ベルト２３の平面性が悪化するおそれがある。例えば、四角柱形状の支持部材４の角部に対応する部分が、搬送ベルト２３と対向した場合、当該角部によって、搬送ベルト２３の状態が変動して、ひいては平面性が悪化する。 If the support member 4 is rotatably fixed, the flatness of the transport belt 23 may deteriorate due to the rotation of the support member 4. For example, when the portion corresponding to the corner portion of the square pillar-shaped support member 4 faces the transport belt 23, the state of the transport belt 23 changes depending on the corner portion, and the flatness is deteriorated.

しかし、本実施の形態では、支持部材４が回転不能であるので、支持部材４の平面部分が搬送ベルト２３と対向したままとなる。その結果、支持部材４の回転に起因する搬送ベルト２３の平面性の悪化を抑制し、ひいては搬送ベルト２３の平面性を向上させることができる。 However, in the present embodiment, since the support member 4 cannot rotate, the flat surface portion of the support member 4 remains facing the transport belt 23. As a result, deterioration of the flatness of the transport belt 23 due to the rotation of the support member 4 can be suppressed, and eventually the flatness of the transport belt 23 can be improved.

また、支持部材４の両端部のそれぞれを別個に固定する構成であるので、例えば、各端部において製造誤差が発生した場合、両側のネジ部材７の締め付け度合いをそれぞれ別個に調整することができる。その結果、端部毎に支持部材４の固定状態を調整することで、支持部材４による搬送ベルト２３の平面性を維持しやすくすることができる。 Further, since both ends of the support member 4 are fixed separately, for example, when a manufacturing error occurs at each end, the degree of tightening of the screw members 7 on both sides can be adjusted separately. .. As a result, by adjusting the fixed state of the support member 4 for each end portion, it is possible to easily maintain the flatness of the transport belt 23 by the support member 4.

また、支持部材４が、搬送ベルト２３の画像形成領域に対応する部分の上流側と下流側の２箇所において、画像形成領域を挟むように２つ設けられている。その結果、搬送ベルト２３の画像形成領域に対応する部分の平面性を上流側と下流側の両方で維持することができ、ひいては搬送ベルト２３の画像形成領域に対応する部分の平面性をさらに担保しやすくすることができる。 Further, two support members 4 are provided so as to sandwich the image forming region at two locations on the upstream side and the downstream side of the portion corresponding to the image forming region of the transport belt 23. As a result, the flatness of the portion corresponding to the image forming region of the transport belt 23 can be maintained on both the upstream side and the downstream side, and by extension, the flatness of the portion corresponding to the image forming region of the transport belt 23 is further ensured. Can be made easier.

なお、上記実施の形態では、支持部材４の端部の固定箇所は、支持部材４と搬送ベルト２３との対向方向（上下方向）における中央部分であったが、本発明はこれに限定されない。例えば、図６に示すように、支持部材４の端部の固定箇所が、当該対向方向において、支持部材４の中央部（破線Ｃ参照）よりも搬送ベルト２３側の部位であっても良い。言い換えると、側壁６およびネジ部材７（引っ張り部）は、当該対向方向において、支持部材４の中央部よりも搬送ベルト２３側の部位を引っ張る。 In the above embodiment, the fixing portion of the end portion of the support member 4 is the central portion in the facing direction (vertical direction) between the support member 4 and the transport belt 23, but the present invention is not limited to this. For example, as shown in FIG. 6, the fixing portion of the end portion of the support member 4 may be a portion closer to the transport belt 23 than the central portion (see the broken line C) of the support member 4 in the facing direction. In other words, the side wall 6 and the screw member 7 (pulling portion) pull the portion on the transport belt 23 side of the central portion of the supporting member 4 in the facing direction.

このようにすることで、支持部材４に付与される引っ張り荷重の作用点を搬送ベルト２３に近づけることができる。その結果、支持部材４の、搬送ベルト２３と対面する側を変形させやすくすることができ、ひいては搬送ベルト２３における平面性を担保しやすくすることができる。 By doing so, the point of action of the tensile load applied to the support member 4 can be brought closer to the transport belt 23. As a result, the side of the support member 4 facing the transport belt 23 can be easily deformed, and the flatness of the transport belt 23 can be easily ensured.

また、対向方向において支持部材４の中央部よりも搬送ベルト２３側の部位を引っ張るので、中央部よりも搬送ベルト２３とは反対側の部位を引っ張る構成よりも、引っ張る力を弱くすることができる。その結果、支持部材４にかかる負荷を小さくすることができるので、支持部材４の耐久性を向上させることができる。また、支持部材４を引っ張る力を弱くすることで、搬送ベルト２３の調整を容易に行うことができる。また、これにより、搬送ベルト２３の調整に要する力を弱くすることができるので、搬送ベルト２３の調整性を向上させることができる。 Further, since the portion on the transport belt 23 side of the support member 4 is pulled in the opposite direction, the pulling force can be weakened as compared with the configuration of pulling the portion on the side opposite to the transport belt 23 from the central portion. .. As a result, the load applied to the support member 4 can be reduced, so that the durability of the support member 4 can be improved. Further, by weakening the pulling force of the support member 4, the transport belt 23 can be easily adjusted. Further, as a result, the force required for adjusting the transport belt 23 can be weakened, so that the adjustability of the transport belt 23 can be improved.

また、図６に示す構成では、支持部材４の固定箇所を搬送ベルト２３側に位置させることで、支持部材４の、搬送ベルト２３と対面する側を変形させやすくしていたが、本発明はこれに限定されない。例えば、図７に示すように、支持部材４の第１部位４１の断面係数が、支持部材４の第２部位４２の断面係数よりも低くなるようにしても良い。なお、図７〜９の左右方向は、搬送ベルト２３の搬送方向である。 Further, in the configuration shown in FIG. 6, by locating the fixing portion of the support member 4 on the transfer belt 23 side, the side of the support member 4 facing the transfer belt 23 can be easily deformed. Not limited to this. For example, as shown in FIG. 7, the cross-sectional coefficient of the first portion 41 of the support member 4 may be lower than the cross-sectional coefficient of the second portion 42 of the support member 4. The left-right directions in FIGS. 7 to 9 are the transport directions of the transport belt 23.

第１部位４１は、支持部材４と搬送ベルト２３との対向方向において、支持部材４の中央部（破線Ｃ参照）よりも搬送ベルト２３側の部位である。第２部位４２は、支持部材４における第１部位４１以外の部位であって、第１部位４１を挟んで搬送ベルト２３とは反対側の部位である。 The first portion 41 is a portion on the transport belt 23 side of the central portion (see the broken line C) of the support member 4 in the direction opposite to the support member 4 and the transport belt 23. The second portion 42 is a portion of the support member 4 other than the first portion 41, and is a portion on the opposite side of the transport belt 23 with the first portion 41 interposed therebetween.

図７に示す支持部材４は、断面視において台形状に構成されており、図７における上底の部分である第１部位４１の表面４１Ａが、図７における下底の部分である第２部位４２の表面４２Ａよりも短い構成となっている。 The support member 4 shown in FIG. 7 is formed in a trapezoidal shape in a cross-sectional view, and the surface 41A of the first portion 41, which is the upper bottom portion in FIG. 7, is the second portion, which is the lower bottom portion in FIG. The structure is shorter than the surface 42A of 42.

このようにしても、第１部位４１の方が、第２部位４２よりも変形しやすくなる。つまり、支持部材４の、搬送ベルト２３と対面する側を変形させやすくすることができ、ひいては搬送ベルト２３における平面性を担保しやすくすることができる。 Even in this way, the first portion 41 is more easily deformed than the second portion 42. That is, the side of the support member 4 facing the transport belt 23 can be easily deformed, and the flatness of the transport belt 23 can be easily ensured.

また、図８に示すように、第１部位４１の材質が、第２部位４２の材質よりも柔らかい構成としても良い。 Further, as shown in FIG. 8, the material of the first portion 41 may be softer than the material of the second portion 42.

図８に示す支持部材４では、第１部位４１がＰＯＭ（ポリアセタール）等のプラスチック部材であり、第２部位４２が金属部材である。 In the support member 4 shown in FIG. 8, the first portion 41 is a plastic member such as POM (polyacetal), and the second portion 42 is a metal member.

このようにしても、第１部位４１の方が、第２部位４２よりも変形しやすくなる。つまり、支持部材４の、搬送ベルト２３と対面する側を変形させやすくすることができ、ひいては搬送ベルト２３における平面性を担保しやすくすることができる。 Even in this way, the first portion 41 is more easily deformed than the second portion 42. That is, the side of the support member 4 facing the transport belt 23 can be easily deformed, and the flatness of the transport belt 23 can be easily ensured.

また、図９に示す構成のように、第１部位４１に中空部４１Ｂが形成された構成であっても良い。言い換えると、支持部材４は、支持部材４と搬送ベルト２３との対向方向において、中央部（破線Ｃ参照）よりも搬送ベルト２３側に位置する中空部４１Ｂを有する。中空部４１Ｂは、幅方向に延びており、支持部材４を貫通している。 Further, as in the configuration shown in FIG. 9, the hollow portion 41B may be formed in the first portion 41. In other words, the support member 4 has a hollow portion 41B located closer to the transport belt 23 than the central portion (see the broken line C) in the direction opposite to the support member 4 and the transport belt 23. The hollow portion 41B extends in the width direction and penetrates the support member 4.

このようにしても、第１部位４１の方が、第２部位４２よりも変形しやすくなる。つまり、支持部材４の、搬送ベルト２３と対面する側を変形させやすくすることができ、ひいては搬送ベルト２３における平面性を担保しやすくすることができる。 Even in this way, the first portion 41 is more easily deformed than the second portion 42. That is, the side of the support member 4 facing the transport belt 23 can be easily deformed, and the flatness of the transport belt 23 can be easily ensured.

特に、この構成では、支持部材４が、樹脂部材等のように、金属部材のように剛性の高い部材ではない部材で構成されている場合、中空部が形成されていない第２部位４２により、支持部材４全体の剛性を確保することができる。 In particular, in this configuration, when the support member 4 is composed of a member that is not a member having high rigidity such as a metal member such as a resin member, the second portion 42 in which the hollow portion is not formed causes the support member 4. The rigidity of the entire support member 4 can be ensured.

また、中空部４１Ｂは、支持部材４が金属部材のように剛性の高い部材で構成されている場合、第１部位４１のみではなく、例えば対向方向において支持部材４全体に形成されていても良い。 Further, when the support member 4 is made of a member having high rigidity such as a metal member, the hollow portion 41B may be formed not only on the first portion 41 but also on the entire support member 4 in the facing direction, for example. ..

また、上記実施の形態では、支持部材４の両端部が、側壁６およびネジ部材７により固定されていたが、本発明はこれに限定されず、支持部材４の両端部のうち、片方のみが側壁６およびネジ部材７により固定支持されていても良い。 Further, in the above embodiment, both ends of the support member 4 are fixed by the side wall 6 and the screw member 7, but the present invention is not limited to this, and only one of both ends of the support member 4 is fixed. It may be fixedly supported by the side wall 6 and the screw member 7.

このような支持部材４は、図１０に示すように、装置の幅方向における支持部材４の第１端部４Ａ（図１０における右端部）が、右側の側壁６およびネジ部材７により固定支持されている。第１端部４Ａは、右側の側壁６と間隔をあけて配置されている。また、支持部材４は、幅方向における支持部材４の第２端部４Ｃ（図１０における左端部）が、装置の左側の側壁６に固定支持されている。具体的には、第２端部４Ｃは、側壁６に嵌め込むことにより固定されている。 In such a support member 4, as shown in FIG. 10, the first end portion 4A (right end portion in FIG. 10) of the support member 4 in the width direction of the device is fixedly supported by the right side wall 6 and the screw member 7. ing. The first end portion 4A is arranged at a distance from the side wall 6 on the right side. Further, in the support member 4, the second end portion 4C (left end portion in FIG. 10) of the support member 4 in the width direction is fixedly supported by the side wall 6 on the left side of the device. Specifically, the second end portion 4C is fixed by fitting it into the side wall 6.

すなわち、第２端部４Ｃが、左側の側壁６およびネジ部材７（引っ張り部以外の部材）に固定され、第１端部４Ａが、右側の側壁６およびネジ部材７（引っ張り部）により固定支持されるように支持部材４が構成されている。 That is, the second end portion 4C is fixed to the left side wall 6 and the screw member 7 (members other than the pull portion), and the first end portion 4A is fixedly supported by the right side wall 6 and the screw member 7 (pull portion). The support member 4 is configured so as to be used.

このような構成であっても、支持部材４の撓み変形を低減することができる。また、ネジ部材を用いずに第２端部を固定支持するので、第１端部に対応するネジ部材７を設けるのみで良いので、部品点数を削減することができる。 Even with such a configuration, it is possible to reduce the bending deformation of the support member 4. Further, since the second end portion is fixedly supported without using the screw member, it is only necessary to provide the screw member 7 corresponding to the first end portion, so that the number of parts can be reduced.

また、上記実施の形態では、引っ張り部が側壁６およびネジ部材７で構成されていたが、本発明はこれに限定されず、例えば、エアーシリンダーで構成されていても良い。 Further, in the above embodiment, the pulling portion is composed of the side wall 6 and the screw member 7, but the present invention is not limited to this, and may be composed of, for example, an air cylinder.

具体的には、図１１に示すように、引っ張り部８は、支持部材４の端部に固定されるピストン部８１と、ピストン部８１を左右方向に移動可能に支持するシリンダー部８２とを有する。 Specifically, as shown in FIG. 11, the pulling portion 8 has a piston portion 81 fixed to an end portion of the support member 4, and a cylinder portion 82 that movably supports the piston portion 81 in the left-right direction. ..

引っ張り部８は、シリンダー部８２においてエアーの圧力を調整することで、ピストン部８１によって、支持部材４を外側に引っ張るようにする。 The pulling portion 8 adjusts the air pressure in the cylinder portion 82 so that the support member 4 is pulled outward by the piston portion 81.

このように構成することでも、搬送ベルト２３の平面性を担保することができ、ひいては搬送ベルト２３と記録ヘッド３とのギャップを精度良く調整することができる。 With this configuration, the flatness of the transport belt 23 can be ensured, and the gap between the transport belt 23 and the recording head 3 can be adjusted with high accuracy.

また、図１２に示すように、引っ張り部は、支持部材４の端部を搬送ベルト２３の外側に向けて付勢する付勢部材８３を含む構成であっても良い。 Further, as shown in FIG. 12, the pulling portion may include an urging member 83 that urges the end portion of the support member 4 toward the outside of the transport belt 23.

図１２に示す支持部材４の端部４Ａには、延出部材４３が設けられている。延出部材４３は、支持部材４の端部４Ａから延出する延出部４３Ａと、延出部４３Ａの先端部に設けられる押圧部４３Ｂとを有する。 An extension member 43 is provided at the end 4A of the support member 4 shown in FIG. The extending member 43 has an extending portion 43A extending from the end portion 4A of the supporting member 4 and a pressing portion 43B provided at the tip end portion of the extending portion 43A.

延出部４３Ａは、円柱状に構成されており、画像形成装置１における、支持部材４の端部４Ａの外側に設けられる側壁６に支持されている。押圧部４３Ｂは、延出部４３Ａよりも径が大きく構成されており、側壁６よりも外側に位置している。 The extending portion 43A is formed in a columnar shape, and is supported by a side wall 6 provided outside the end portion 4A of the supporting member 4 in the image forming apparatus 1. The pressing portion 43B has a diameter larger than that of the extending portion 43A, and is located outside the side wall 6.

付勢部材８３は、側壁６と押圧部４３Ｂとの間に設けられるバネである。付勢部材８３は、側壁６に対して押圧部４３Ｂを外側に付勢している。側壁６、延出部材４３および付勢部材８３は、本発明の「引っ張り部」に対応する。 The urging member 83 is a spring provided between the side wall 6 and the pressing portion 43B. The urging member 83 urges the pressing portion 43B to the outside with respect to the side wall 6. The side wall 6, the extending member 43, and the urging member 83 correspond to the "pulled portion" of the present invention.

これにより、押圧部４３Ｂが外側に付勢されることで、支持部材４は、外側に向けて引っ張られる。その結果、搬送ベルト２３の平面性を担保することができ、ひいては搬送ベルト２３と記録ヘッド３とのギャップを精度良く調整することができる。なお、延出部材４３は、支持部材４とは別体であっても良い。 As a result, the pressing portion 43B is urged outward, so that the support member 4 is pulled outward. As a result, the flatness of the transport belt 23 can be ensured, and the gap between the transport belt 23 and the recording head 3 can be adjusted with high accuracy. The extension member 43 may be a separate body from the support member 4.

また、上記実施の形態では、支持部材４は角柱形状であったが、本発明はこれに限定されず、例えば円柱形状であっても良い。また、支持部材が円柱形状である場合、支持部材を回転可能なように固定されていても良い。 Further, in the above embodiment, the support member 4 has a prismatic shape, but the present invention is not limited to this, and may be, for example, a cylindrical shape. Further, when the support member has a cylindrical shape, the support member may be fixed so as to be rotatable.

また、上記実施の形態では、支持部材４は四角柱形状であったが、本発明はこれに限定されず、三角柱形状でも良いし、その他の多角柱形状であっても良い。ただし、搬送ベルト２３の平面性を安定させる観点から、角柱形状の平面部分が搬送ベルト２３と対向しているようにすることが好ましい。 Further, in the above embodiment, the support member 4 has a quadrangular prism shape, but the present invention is not limited to this, and may be a triangular prism shape or another polygonal prism shape. However, from the viewpoint of stabilizing the flatness of the transport belt 23, it is preferable that the flat portion having a prismatic shape faces the transport belt 23.

また、上記実施の形態では、ベルト部材として、記録媒体Ｐを搬送する搬送ベルト２３を例示したが、本発明はこれに限定されず、例えば、中間転写ベルト等であっても良い。 Further, in the above embodiment, the transport belt 23 that conveys the recording medium P is exemplified as the belt member, but the present invention is not limited to this, and for example, an intermediate transfer belt or the like may be used.

また、上記実施の形態では、画像形成部として、インクジェットヘッドを有する記録ヘッド３、つまり、インクジェット方式に基づく構成を例示したが、本発明はこれに限定されず、インクジェット方式に基づく構成以外の構成を画像形成部としても良い。 Further, in the above embodiment, the recording head 3 having an inkjet head, that is, the configuration based on the inkjet method is exemplified as the image forming unit, but the present invention is not limited to this, and the configuration other than the configuration based on the inkjet method is not limited to this. May be used as an image forming unit.

また、上記実施の形態では、支持部材４が２つ設けられていたが、本発明はこれに限定されず、１つ以上設けられていれば良い。 Further, in the above embodiment, two support members 4 are provided, but the present invention is not limited to this, and one or more support members 4 may be provided.

また、上記実施の形態では、支持部材４が画像形成領域を挟むように設けられていたが、本発明はこれに限定されない。例えば、支持部材４が、画像形成領域の範囲内の箇所や、駆動ローラー２１と画像形成領域の端との間の範囲、従動ローラー２２と画像形成領域の端との間の範囲のような画像形成領域に対応する箇所に設けられていれば、どの箇所に設けられていても良い。 Further, in the above embodiment, the support member 4 is provided so as to sandwich the image forming region, but the present invention is not limited to this. For example, an image such as a position where the support member 4 is within the range of the image forming region, a range between the driving roller 21 and the edge of the image forming region, and a range between the driven roller 22 and the edge of the image forming region. As long as it is provided at a location corresponding to the formation region, it may be provided at any location.

その他、上記実施の形態は、何れも本発明を実施するにあたっての具体化の一例を示したものに過ぎず、これらによって本発明の技術的範囲が限定的に解釈されてはならないものである。すなわち、本発明はその要旨、またはその主要な特徴から逸脱することなく、様々な形で実施することができる。 In addition, the above-described embodiments are merely examples of embodiment of the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from its gist or its main features.

１ 画像形成装置
２ ベルト搬送装置
３ 記録ヘッド
４ 支持部材
４Ａ 端部
４Ｂ 孔
５ テンションローラー
６ 側壁
６Ａ 孔
２１ 駆動ローラー
２２ 従動ローラー
２３ 搬送ベルト
１００ 制御部
１１０ 記録ヘッド駆動部
１２０ 搬送駆動部
１３０ 入出力インターフェース
1 Image forming device 2 Belt transfer device 3 Recording head 4 Support member 4A End 4B hole 5 Tension roller 6 Side wall 6A hole 21 Drive roller 22 Driven roller 23 Transfer belt 100 Control unit 110 Recording head drive unit 120 Transfer drive unit 130 Input / output interface

Claims (15)

無端状のベルト部材と、
前記ベルト部材と対向配置され、前記ベルト部材と対向する画像形成領域に画像を形成する画像形成部と、
前記ベルト部材の幅方向に延び、前記ベルト部材の前記画像形成領域に対応する箇所において前記ベルト部材の前記幅方向全体を支持する支持部材と、
前記支持部材の端部を前記ベルト部材の外側に向けて引っ張る引っ張り部と、
を備える画像形成装置。 Endless belt member and
An image forming portion that is arranged to face the belt member and forms an image in an image forming region facing the belt member.
A support member extending in the width direction of the belt member and supporting the entire width direction of the belt member at a portion corresponding to the image forming region of the belt member.
A pulling portion that pulls the end portion of the support member toward the outside of the belt member, and a pulling portion.
An image forming apparatus comprising. 前記引っ張り部は、前記幅方向における前記支持部材の中央部の撓み変形を矯正するように前記支持部材の端部を引っ張る、
請求項１に記載の画像形成装置。 The pulling portion pulls the end portion of the supporting member so as to correct the bending deformation of the central portion of the supporting member in the width direction.
The image forming apparatus according to claim 1. 前記引っ張り部は、前記支持部材と前記ベルト部材との対向方向において、前記支持部材の中央部よりも前記ベルト部材側の部位を引っ張る、
請求項１または請求項２に記載の画像形成装置。 The pulling portion pulls a portion on the belt member side of the central portion of the supporting member in a direction facing the support member and the belt member.
The image forming apparatus according to claim 1 or 2. 前記支持部材は、前記支持部材と前記ベルト部材との対向方向において、前記支持部材の中央部よりも前記ベルト部材側の第１部位と、前記第１部位以外の部位である第２部位とを有し、
前記第１部位の断面係数は、前記第２部位の断面係数よりも低い、
請求項１〜３の何れか１項に記載の画像形成装置。 The support member includes a first portion on the belt member side of the central portion of the support member and a second portion that is a portion other than the first portion in the direction opposite to the support member and the belt member. Have and
The section modulus of the first part is lower than the section modulus of the second part.
The image forming apparatus according to any one of claims 1 to 3. 前記第１部位の材質は、前記第２部位の材質よりも柔らかい、
請求項４に記載の画像形成装置。 The material of the first part is softer than the material of the second part.
The image forming apparatus according to claim 4. 前記支持部材は、回転不能なように固定されている、
請求項１〜５の何れか１項に記載の画像形成装置。 The support member is fixed so as not to rotate.
The image forming apparatus according to any one of claims 1 to 5. 前記引っ張り部は、前記幅方向における前記支持部材の第１端部側に設けられ、
前記幅方向における前記支持部材の第２端部は、前記引っ張り部以外の部材に固定支持され、
前記幅方向における前記支持部材の前記第１端部は、前記引っ張り部に固定支持されている、
請求項１〜６の何れか１項に記載の画像形成装置。 The pulling portion is provided on the first end side of the support member in the width direction.
The second end portion of the support member in the width direction is fixedly supported by a member other than the pull portion.
The first end portion of the support member in the width direction is fixedly supported by the pulling portion.
The image forming apparatus according to any one of claims 1 to 6. 前記引っ張り部は、前記幅方向における前記支持部材の両端部のそれぞれに対応して設けられ、
前記幅方向における前記支持部材の第１端部、および、前記幅方向における前記支持部材の第２端部は、それぞれに対応する引っ張り部に固定支持されている、
請求項１〜６の何れか１項に記載の画像形成装置。 The pulling portion is provided corresponding to each of both ends of the support member in the width direction.
The first end portion of the support member in the width direction and the second end portion of the support member in the width direction are fixedly supported by the corresponding pulling portions.
The image forming apparatus according to any one of claims 1 to 6. 前記支持部材は、少なくとも２つ設けられ、
少なくとも２つの支持部材は、前記画像形成領域を挟むように配置される、
請求項１〜８の何れか１項に記載の画像形成装置。 At least two of the support members are provided.
At least two support members are arranged so as to sandwich the image forming region.
The image forming apparatus according to any one of claims 1 to 8. 前記引っ張り部は、
前記支持部材の端部よりも外側に位置する固定部材と、
前記固定部材と前記支持部材の端部との両方に挿通されるネジ部材と、
を有する、
請求項１〜９の何れか１項に記載の画像形成装置。 The pulling part is
A fixing member located outside the end of the support member and
A screw member inserted through both the fixing member and the end portion of the supporting member,
Have,
The image forming apparatus according to any one of claims 1 to 9. 前記引っ張り部は、前記支持部材の端部に固定されるピストン部と、前記ピストン部を移動可能に支持するシリンダー部とを有するエアーシリンダーである、
請求項１〜９の何れか１項に記載の画像形成装置。 The pulling portion is an air cylinder having a piston portion fixed to an end portion of the support member and a cylinder portion that movably supports the piston portion.
The image forming apparatus according to any one of claims 1 to 9. 前記引っ張り部は、前記支持部材の端部を前記ベルト部材の外側に向けて付勢する付勢部材を含む、
請求項１〜９の何れか１項に記載の画像形成装置。 The pulling portion includes an urging member that urges the end portion of the supporting member toward the outside of the belt member.
The image forming apparatus according to any one of claims 1 to 9. 前記支持部材は、前記幅方向に延びる中空部を有する、
請求項１〜１２の何れか１項に記載の画像形成装置。 The support member has a hollow portion extending in the width direction.
The image forming apparatus according to any one of claims 1 to 12. 前記中空部は、前記支持部材と前記ベルト部材との対向方向において、前記支持部材の中央部よりも前記ベルト部材側に位置する、
請求項１３に記載の画像形成装置。 The hollow portion is located closer to the belt member than the central portion of the support member in the direction opposite to the support member and the belt member.
The image forming apparatus according to claim 13. 前記支持部材は、角柱形状または円柱形状である、
請求項１〜１４の何れか１項に記載の画像形成装置。
The support member has a prismatic shape or a cylindrical shape.
The image forming apparatus according to any one of claims 1 to 14.
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