JP6962423B2

JP6962423B2 - Image reader

Info

Publication number: JP6962423B2
Application number: JP2020131979A
Authority: JP
Inventors: 正杉崎; 真理植松; 泰寛北市; 裕渡部
Original assignee: Fuji Xerox Co Ltd; Fujifilm Business Innovation Corp
Current assignee: Fujifilm Business Innovation Corp
Priority date: 2019-03-20
Filing date: 2020-08-03
Publication date: 2021-11-05
Anticipated expiration: 2034-03-03
Also published as: JP2020188506A

Description

本発明は、画像読取装置に関する。 The present invention relates to an image reader.

コンタクトイメージセンサーユニット（ＣＩＳユニット）を搭載するキャリッジハウジングに設けられたベース部材が、ガイドシャフトに周方向の３点で接触するように構成された原稿読取装置は、従来から知られている（例えば、特許文献１参照）。 A document reading device configured such that a base member provided on a carriage housing on which a contact image sensor unit (CIS unit) is mounted comes into contact with a guide shaft at three points in the circumferential direction has been conventionally known (for example,). , Patent Document 1).

特開２００５−８６４８２号公報Japanese Unexamined Patent Publication No. 2005-86482

本発明は、原稿を読み取る部材を搭載した筐体の移動時のがたつきを抑制できる画像読取装置を得ることを目的とする。 An object of the present invention is to obtain an image reading device capable of suppressing rattling when moving a housing equipped with a member for reading a document.

本開示の第１の態様に係る画像読取装置は、原稿台に載せられた原稿を読み取るときに前記原稿の一端部から他端部へ前記原稿を読み取る部材を搭載して移動させる筐体であって、円柱状の案内部材に下方から支持されて前記原稿の一端部から他端部へ移動する筐体と、前記筐体の底の下面側に締結具によって締結され、摺動性が良い樹脂を含んで構成され、前記案内部材に接触する接触部を有する被案内部材と、を備え、前記被案内部材は、前記原稿を読み取るときの移動方向における上流側で前記案内部材に接触する上流側接触部と前記移動方向における下流側で前記案内部材に接触する下流側接触部とを有し、前記上流側接触部と前記下流側接触部とは、一体に形成されており、前記締結具は、前記移動方向における前記上流側接触部と前記下流側接触部との間に配置されている。 The image reading device according to the first aspect of the present disclosure is a housing for mounting and moving a member for reading the original from one end to the other when reading the original placed on the platen. A resin that is supported from below by a columnar guide member and moves from one end to the other end of the document and is fastened to the lower surface side of the bottom of the housing by fasteners and has good slidability. The guided member is provided with a guided member having a contact portion that comes into contact with the guide member, and the guided member is an upstream side that contacts the guide member on the upstream side in a moving direction when reading the document. The fastener has a contact portion and a downstream contact portion that contacts the guide member on the downstream side in the moving direction, and the upstream contact portion and the downstream contact portion are integrally formed. , It is arranged between the upstream contact portion and the downstream contact portion in the moving direction.

本開示の第２の態様に係る画像読取装置は、前記被案内部材は、前記移動方向における前記下流側接触部よりも下流側において、前記締結具とは異なる締結具によって前記筐体の底の下面側に、締結されている。 In the image reading device according to the second aspect of the present disclosure, the guided member is located on the downstream side of the downstream contact portion in the moving direction by a fastener different from the fastener at the bottom of the housing. It is fastened to the lower surface side.

本開示の第３の態様に係る画像読取装置は、前記締結具は、前記原稿を読み取るときの移動方向における、互いに異なる位置に複数設けられている。 In the image reading device according to the third aspect of the present disclosure, a plurality of the fasteners are provided at different positions in the moving direction when reading the original.

本開示の第４の態様に係る画像読取装置は、前記筐体は、前記筐体を移動させるための移動部材に固定された固定部を備え、前記固定部と前記被案内部材とは別体として形成されている。 In the image reading device according to the fourth aspect of the present disclosure, the housing includes a fixing portion fixed to a moving member for moving the housing, and the fixing portion and the guided member are separate bodies. Is formed as.

本開示の第５の態様に係る画像読取装置は、前記筐体は、前記移動方向における上流側に、前記移動方向に向けた壁面を有する壁部を有し、前記移動方向における前記上流側接触部と前記壁部との間を連結する支持部を有する。 In the image reading device according to the fifth aspect of the present disclosure, the housing has a wall portion having a wall surface facing the moving direction on the upstream side in the moving direction, and the upstream contact in the moving direction. It has a support portion that connects the portion and the wall portion.

本開示の第６の態様に係る画像読取装置は、前記上流側接触部と前記下流側接触部とで前記案内部材に接触する箇所の個数は互いに異なる。 In the image reading device according to the sixth aspect of the present disclosure, the number of portions of the upstream contact portion and the downstream contact portion that come into contact with the guide member is different from each other.

本開示の第７の態様に係る画像読取装置は、前記被案内部材はポリアセタールを含んで構成されている。 In the image reading device according to the seventh aspect of the present disclosure, the guided member includes polyacetal.

本開示の第８の態様に係る画像読取装置は、前記原稿を読み取る部材に取り付けられ、前記原稿台に接することで前記原稿を読み取る部材の高さ方向の位置決めがされる凸部を備えている。 The image reading device according to the eighth aspect of the present disclosure includes a convex portion that is attached to a member that reads the original and is positioned in the height direction of the member that reads the original by coming into contact with the platen. ..

本開示の第１の態様に係る画像読取装置によれば、原稿を読み取る部材を搭載した筐体の移動時のがたつきが抑制される。 According to the image reading device according to the first aspect of the present disclosure, rattling during movement of the housing on which the member for reading the original is mounted is suppressed.

本開示の第２〜第８の態様に係る画像読取装置によれば、原稿を読み取る部材を搭載した筐体の移動時のがたつきが抑制される。 According to the image reading device according to the second to eighth aspects of the present disclosure, rattling during movement of the housing on which the member for reading the original is mounted is suppressed.

画像読取装置を示す斜視図である。It is a perspective view which shows the image reader. 画像読取装置の内部を示す斜視図である。It is a perspective view which shows the inside of an image reader. 画像読取装置の内部を一部省略して拡大して示す断面図である。It is sectional drawing which shows by omitting a part of the inside of an image reader. 読取装置本体を収容した収容部材を示す斜視図である。It is a perspective view which shows the accommodating member accommodating the reading apparatus main body. 読取装置本体を収容した収容部材を一部省略して拡大して示す断面図である。It is sectional drawing which shows in the enlarged view by omitting a part of the accommodating member accommodating the reading apparatus main body. 第１実施形態に係るガイド部材を示す斜視図である。It is a perspective view which shows the guide member which concerns on 1st Embodiment. （Ａ）第１実施形態に係るガイド部材の平面接触部を示す側面図である。（Ｂ）第１実施形態に係るガイド部材の曲面接触部を示す側面図である。(A) It is a side view which shows the plane contact part of the guide member which concerns on 1st Embodiment. (B) It is a side view which shows the curved surface contact part of the guide member which concerns on 1st Embodiment. 第２実施形態に係るガイド部材を示す斜視図である。It is a perspective view which shows the guide member which concerns on 2nd Embodiment. 収容部材に取り付けられた第２実施形態に係るガイド部材を示す底面図である。It is a bottom view which shows the guide member which concerns on 2nd Embodiment attached to the accommodating member. 第２実施形態に係るガイド部材の平面接触部の変形例を示す側面図である。It is a side view which shows the modification of the plane contact part of the guide member which concerns on 2nd Embodiment.

以下、本発明に係る実施の形態について図面を基に詳細に説明する。なお、各図において、矢印ＵＰを画像読取装置１０の上方向とし、矢印ＦＲを画像読取装置１０の前方向とする。そして、矢印ＲＩを画像読取装置１０の右方向とし、原稿台１４に載せられた原稿を読取装置本体５０が読み取るときの副走査方向（収容部材３０の移動方向）とする。また、原稿台１４に載せられる原稿は、左右方向が長手方向とされる。 Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. In each figure, the arrow UP is the upward direction of the image reading device 10, and the arrow FR is the front direction of the image reading device 10. Then, the arrow RI is set to the right direction of the image reading device 10, and the sub-scanning direction (moving direction of the accommodating member 30) when the reading device main body 50 reads the document placed on the platen 14. Further, the document placed on the platen 14 has a longitudinal direction in the left-right direction.

図１に示されるように、画像読取装置１０は、筐体１２の上部側に、原稿が載せられる原稿台１４を有している。原稿台１４は、左右方向が長手方向となる長方形状（矩形状）に形成された透明なガラス板であり、カバー体１６によって開閉されるようになっている。このカバー体１６は、原稿台１４よりも一回り大きい長方形状（矩形状）に形成されており、筐体１２の後部側に左右一対で設けられたヒンジ部１５によって上下方向に開閉可能に構成されている。 As shown in FIG. 1, the image reading device 10 has a document base 14 on which a document is placed on the upper side of the housing 12. The platen 14 is a transparent glass plate formed in a rectangular shape (rectangular shape) whose left-right direction is the longitudinal direction, and is opened and closed by the cover body 16. The cover body 16 is formed in a rectangular shape (rectangular shape) that is one size larger than the platen 14, and can be opened and closed in the vertical direction by a pair of left and right hinge portions 15 provided on the rear side of the housing 12. Has been done.

図２に示されるように、筐体１２の内部（原稿台１４の下方）には、原稿台１４に載せられた原稿を副走査方向（原稿の長手方向一端部から他端部へ）へ移動しつつ読み取る読取装置本体（ＣＩＳユニット）５０が設けられている。図４に示されるように、読取装置本体５０は、原稿の短手方向（原稿の長手方向と直交する方向）の長さ以上の長さとされており、読取装置本体５０の上部で、かつ幅方向（左右方向、副走査方向）中央部には、読取装置本体５０の長手方向に沿った（長手方向に延在する）読取部５２が設けられている。 As shown in FIG. 2, inside the housing 12 (below the platen 14), the document placed on the platen 14 is moved in the sub-scanning direction (from one end to the other end in the longitudinal direction of the document). A reading device main body (CIS unit) 50 for reading while reading is provided. As shown in FIG. 4, the reading device main body 50 has a length equal to or longer than the length in the lateral direction of the document (the direction orthogonal to the longitudinal direction of the document), and is the upper portion and the width of the reading device main body 50. At the center of the direction (horizontal direction, sub-scanning direction), a reading unit 52 along the longitudinal direction of the reading device main body 50 (extending in the longitudinal direction) is provided.

そして、この読取装置本体５０は、収容部材（キャリッジハウジング）３０内に上方から挿入されて収容されるようになっている。収容部材３０は、前後方向（平面視で副走査方向と直交する方向）が長手方向とされた（原稿の短手方向の長さ以上の長さとされた）筐体であり、その長手方向両端部は、筐体１２に一体に形成された支持台１７（図２参照）に移動可能に支持されている。 The reading device main body 50 is inserted into the accommodating member (carriage housing) 30 from above and accommodated. The accommodating member 30 is a housing in which the front-rear direction (the direction orthogonal to the sub-scanning direction in a plan view) is the longitudinal direction (the length is longer than the length in the lateral direction of the document), and both ends in the longitudinal direction thereof. The portion is movably supported by a support base 17 (see FIG. 2) integrally formed with the housing 12.

そして、図３〜図５に示されるように、収容部材３０の底壁３２の下面側における長手方向略中央部には、後述する金属製のシャフト２２に支持されて案内される被案内部材の一例としてのガイド部材４０が取り付けられている。なお、ガイド部材４０については、後で詳述する。 Then, as shown in FIGS. 3 to 5, a guided member supported and guided by a metal shaft 22 described later is provided at a substantially central portion in the longitudinal direction on the lower surface side of the bottom wall 32 of the accommodating member 30. A guide member 40 as an example is attached. The guide member 40 will be described in detail later.

また、収容部材３０の前壁及び後壁の左右方向略中央下部には、後述するスペーサー６０の係合部７０が高さ方向（上下方向）で係合可能となる被係合部の一例としての開口部３４が形成されている。この開口部３４は、高さ方向が長手方向とされた矩形状に形成されている。 Further, as an example of an engaged portion in which the engaging portion 70 of the spacer 60, which will be described later, can be engaged in the height direction (vertical direction) at the substantially central lower portion of the front wall and the rear wall of the accommodating member 30 in the left-right direction. The opening 34 of the is formed. The opening 34 is formed in a rectangular shape whose height direction is the longitudinal direction.

また、図５に示されるように、開口部３４よりも収容部材３０の長手方向内側における底壁３２の上面（底面）両端部で、かつ左右方向略中央部には、後述するコイルスプリング４８の下端部が嵌められるボス部３３が一体に突設されている。このボス部３３は、平面視十字状に形成されており、読取装置本体５０が収容部材３０に収容されたときに、コイルスプリング４８の環状に形成された下端部内に挿入されるようになっている。 Further, as shown in FIG. 5, a coil spring 48, which will be described later, is provided at both ends of the upper surface (bottom surface) of the bottom wall 32 inside the accommodating member 30 in the longitudinal direction from the opening 34, and at substantially the center in the left-right direction. A boss portion 33 into which the lower end portion is fitted is integrally projected. The boss portion 33 is formed in a cross shape in a plan view, and when the reading device main body 50 is accommodated in the accommodating member 30, it is inserted into the annularly formed lower end portion of the coil spring 48. There is.

収容部材３０に収容される読取装置本体５０の長手方向両端部には、位置決め部材の一例としてのスペーサー６０がそれぞれ装着されている。各スペーサー６０は、一対の脚部６２（図４も参照）を有しており、一対の脚部６２の下端部には、係止部の一例としての爪部６３がそれぞれ形成されている。そして、読取装置本体５０の左側壁及び右側壁における下端部には、爪部６３が係止される被係止部の一例としての切欠部５３がそれぞれ形成されている。 Spacers 60 as an example of the positioning member are mounted on both ends of the reading device main body 50 housed in the housing member 30 in the longitudinal direction. Each spacer 60 has a pair of leg portions 62 (see also FIG. 4), and a claw portion 63 as an example of a locking portion is formed at the lower end portion of the pair of leg portions 62, respectively. A notch 53 as an example of a locked portion to which the claw portion 63 is locked is formed at the lower end portions of the left side wall and the right side wall of the reading device main body 50, respectively.

また、図４、図５に示されるように、一対の脚部６２の上端部は、矩形平板状の連結部６４によって一体に連結されている。そして、連結部６４の下面には、読取装置本体５０の上部の長手方向両端部に形成されたボス穴５８に挿入される円柱状のボス部６８が、読取装置本体５０の幅方向（左右方向、副走査方向）に予め決められた間隔を隔てて一体に突設されている。 Further, as shown in FIGS. 4 and 5, the upper ends of the pair of legs 62 are integrally connected by a rectangular flat plate-shaped connecting portion 64. Then, on the lower surface of the connecting portion 64, a columnar boss portion 68 inserted into the boss holes 58 formed at both ends in the longitudinal direction of the upper portion of the reading device main body 50 is provided in the width direction (horizontal direction) of the reading device main body 50. , Sub-scanning direction), and they are integrally projected at a predetermined interval.

したがって、図５に示されるように、前後一対として設けられるスペーサー６０は、各ボス穴５８に各ボス部６８が挿入され、一対の脚部６２の下端部に形成された各爪部６３が、読取装置本体５０に形成された各切欠部５３に係止されることにより、読取装置本体５０の長手方向両端部にそれぞれ取り付けられている。 Therefore, as shown in FIG. 5, in the spacers 60 provided as a pair of front and rear, each boss portion 68 is inserted into each boss hole 58, and each claw portion 63 formed at the lower end portion of the pair of leg portions 62 is formed. By being locked to each notch 53 formed in the reading device main body 50, the reading device main body 50 is attached to both ends in the longitudinal direction.

また、図４に示されるように、連結部６４の上面には、読取装置本体５０の長手方向（前後方向）から見て略半円形状となる（略半円板状の）凸部６６が、読取装置本体５０の幅方向（左右方向、副走査方向）に予め決められた間隔を隔てて一体に突設されている（ボス部６８の表裏反対側に凸部６６が形成されている）。 Further, as shown in FIG. 4, on the upper surface of the connecting portion 64, a convex portion 66 having a substantially semicircular shape (substantially semicircular plate shape) when viewed from the longitudinal direction (front-back direction) of the reading device main body 50 is formed. , The reading device main body 50 is integrally projected in the width direction (horizontal direction, sub-scanning direction) at a predetermined interval (convex portions 66 are formed on opposite sides of the front and back sides of the boss portion 68). ..

この一対の凸部６６が、予め決められた圧力（後述するコイルスプリング４８の付勢力）で原稿台１４の裏面に副走査方向及び復帰方向へ摺動可能に接触するようになっている（図３参照）。したがって、スペーサー６０は、原稿台１４との摺動性が良好な樹脂材の一例であるポリアセタール（ＰＯＭ）で成形されている。 The pair of convex portions 66 are slidably contacted with the back surface of the platen 14 in the sub-scanning direction and the return direction with a predetermined pressure (the urging force of the coil spring 48 described later) (FIG. 3). Therefore, the spacer 60 is formed of polyacetal (POM), which is an example of a resin material having good slidability with the platen 14.

また、図４、図５に示されるように、スペーサー６０の連結部６４における一方（読取装置本体５０の長手方向外側）の辺縁部の左右方向中央部には、下方へ向かって延在する係合部７０が一体に形成されている。この係合部７０は、読取装置本体５０の前壁及び後壁にそれぞれ対向配置されており、その高さは、読取装置本体５０の高さよりも高くされている。 Further, as shown in FIGS. 4 and 5, one of the connecting portions 64 of the spacer 60 (outside the longitudinal direction of the reading device main body 50) extends downward in the central portion in the left-right direction. The engaging portion 70 is integrally formed. The engaging portion 70 is arranged to face the front wall and the rear wall of the reading device main body 50, respectively, and the height thereof is higher than the height of the reading device main body 50.

つまり、係合部７０の下端部（後述する爪部７２）は、読取装置本体５０の下面よりも下方側へ向けて突出されている。そして、その読取装置本体５０の下面よりも下方側へ突出されている下端部が前後方向へ弾性変形可能なように、係合部７０の中途部から下側の板厚が上側の板厚よりも薄く形成されている。この係合部７０の下端部が、収容部材３０の開口部３４に高さ方向で係合可能になっている。 That is, the lower end portion of the engaging portion 70 (the claw portion 72 described later) protrudes downward from the lower surface of the reading device main body 50. Then, the plate thickness from the middle to the lower side of the engaging portion 70 is higher than the upper plate thickness so that the lower end portion protruding downward from the lower surface of the reading device main body 50 can be elastically deformed in the front-rear direction. Is also thinly formed. The lower end of the engaging portion 70 can be engaged with the opening 34 of the accommodating member 30 in the height direction.

詳細に説明すると、係合部７０の下端部には、読取装置本体５０の長手方向外側へ向かって突出する爪部７２が形成されており、収容部材３０に読取装置本体５０を収容したときに、その爪部７２が開口部３４の上側辺縁部に係合するようになっている。これにより、例えば画像読取装置１０の製造時に、読取装置本体５０が収容された収容部材３０を落下させても、その読取装置本体５０の収容部材３０からの脱落が抑制又は防止される構成になっている。 To be described in detail, a claw portion 72 that protrudes outward in the longitudinal direction of the reading device main body 50 is formed at the lower end portion of the engaging portion 70, and when the reading device main body 50 is accommodated in the accommodating member 30. , The claw portion 72 is adapted to engage with the upper edge portion of the opening 34. As a result, for example, even if the accommodating member 30 in which the reading device main body 50 is housed is dropped during the manufacture of the image reading device 10, the reading device main body 50 is prevented from falling off from the accommodating member 30. ing.

また、図５に示されるように、読取装置本体５０の下面両端部と収容部材３０の底壁３２の上面（底面）両端部との間には、付勢部材の一例としてのコイルスプリング４８が設けられている。詳細に説明すると、前後一対として設けられるコイルスプリング４８は、上端部が、読取装置本体５０の下面両端部に取り付けられており、読取装置本体５０が収容部材３０に収容されたときに、下端部が、収容部材３０の底壁３２の上面（底面）両端部に突設されたボス部３３に嵌められるようになっている。 Further, as shown in FIG. 5, a coil spring 48 as an example of the urging member is provided between both ends of the lower surface of the reading device main body 50 and both ends of the upper surface (bottom surface) of the bottom wall 32 of the accommodating member 30. It is provided. More specifically, the upper ends of the coil springs 48 provided as a pair of front and rear portions are attached to both ends of the lower surface of the reading device main body 50, and when the reading device main body 50 is accommodated in the accommodating member 30, the lower end portions thereof. Is fitted to the boss portions 33 projecting from both ends of the upper surface (bottom surface) of the bottom wall 32 of the accommodating member 30.

なお、各コイルスプリング４８は、副走査方向から見て、各凸部６６の直下に配置されている。換言すれば、副走査方向から見て、各凸部６６は、各コイルスプリング４８の直上に配置されている。これにより、各スペーサー６０は、各コイルスプリング４８の付勢力（弾性復元力）により、上方へ向けて効率よく付勢されて原稿台１４の裏面に接触する構成になっている。したがって、読取装置本体５０は、各凸部６６により、原稿台１４に対する高さ方向の位置が精度よく位置決めされる。 Each coil spring 48 is arranged directly below each convex portion 66 when viewed from the sub-scanning direction. In other words, each convex portion 66 is arranged directly above each coil spring 48 when viewed from the sub-scanning direction. As a result, each spacer 60 is efficiently urged upward by the urging force (elastic restoring force) of each coil spring 48 so as to come into contact with the back surface of the platen 14. Therefore, the position of the reading device main body 50 in the height direction with respect to the platen 14 is accurately positioned by each of the convex portions 66.

また、図２に示されるように、筐体１２の内部には、読取装置本体５０（収容部材３０）を副走査方向へ移動させる移動機構２０が設けられている。詳細に説明すると、移動機構２０は、筐体１２内の前後方向略中央部に左右方向（副走査方向）を軸方向として設けられた円柱状の案内部材の一例としてのシャフト２２を有している。このシャフト２２は、左右の両端部が、筐体１２内の左右両端部に一体に形成された支持部１８に固定されており、読取装置本体５０が収容される収容部材３０を副走査方向（右方向）と、それとは逆の復帰方向（左方向）へ移動可能に支持している。 Further, as shown in FIG. 2, a moving mechanism 20 for moving the reading device main body 50 (accommodating member 30) in the sub-scanning direction is provided inside the housing 12. More specifically, the moving mechanism 20 has a shaft 22 as an example of a columnar guide member provided in the housing 12 at a substantially central portion in the front-rear direction with the left-right direction (sub-scanning direction) as the axial direction. There is. The left and right ends of the shaft 22 are fixed to the support portions 18 integrally formed at the left and right end portions in the housing 12, and the accommodating member 30 in which the reading device main body 50 is accommodated is placed in the sub-scanning direction (). It is movably supported in the right direction) and in the opposite return direction (left direction).

また、移動機構２０は、筐体１２内の右端部（シャフト２２の軸方向一端部）側に設けられたタイミングプーリ２４と、筐体１２内の左端部（シャフト２２の軸方向他端部）側に設けられたタイミングプーリ２６と、タイミングプーリ２４とタイミングプーリ２６とに、内周面に形成された噛合歯２８Ａを噛み合わせるようにして巻き掛けられた、移動部材の一例としてのタイミングベルト２８と、一方（例えば右側）のタイミングプーリ２４と同軸的に設けられ、そのタイミングプーリ２４を正逆両方向に回転駆動させる駆動モーター（図示省略）と、を有している。 Further, the moving mechanism 20 includes a timing pulley 24 provided on the right end portion (one end portion in the axial direction of the shaft 22) in the housing 12 and a left end portion (the other end portion in the axial direction of the shaft 22) in the housing 12. A timing belt 28 as an example of a moving member, which is wound around a timing pulley 26 provided on the side, a timing pulley 24, and a timing pulley 26 so as to engage a meshing tooth 28A formed on an inner peripheral surface. And a drive motor (not shown) that is provided coaxially with the timing pulley 24 on one side (for example, on the right side) and drives the timing pulley 24 to rotate in both forward and reverse directions.

したがって、駆動モーターの駆動により、タイミングプーリ２４が正逆両方向へ回転することで、タイミングベルト２８の前後一方側が副走査方向へ移動し、前後他方側が復帰方向へ移動するようになっている。つまり、タイミングベルト２８の前後一方側と前後他方側とは、互いに同期して反対方向に移動するようになっている。そして、収容部材３０は、例えば前側のタイミングベルト２８に取り付けられている。 Therefore, the timing pulley 24 is rotated in both the forward and reverse directions by the drive of the drive motor, so that one front and rear side of the timing belt 28 moves in the sub-scanning direction and the other front and rear sides move in the return direction. That is, one front-rear side and the other front-rear side of the timing belt 28 move in opposite directions in synchronization with each other. The accommodating member 30 is attached to, for example, the timing belt 28 on the front side.

詳細に説明すると、図３、図５に示されるように、ガイド部材４０に隣接する底壁３２の下面側における長手方向略中央部（ガイド部材４０の後側）には、タイミングベルト２８の噛合歯２８Ａと噛合させる固定部の一例としての噛合部３８が一体に形成されている。この噛合部３８は、矩形ブロック状に形成されており、その下端中央部には、タイミングベルト２８の厚さ以上の間隙が形成されている。そして、噛合部３８の間隙内における一方（本実施形態では後側）の内面には、噛合歯３８Ａが形成されている。 More specifically, as shown in FIGS. 3 and 5, the timing belt 28 meshes with the substantially central portion (rear side of the guide member 40) in the longitudinal direction on the lower surface side of the bottom wall 32 adjacent to the guide member 40. The meshing portion 38 as an example of the fixing portion to be meshed with the tooth 28A is integrally formed. The meshing portion 38 is formed in a rectangular block shape, and a gap equal to or larger than the thickness of the timing belt 28 is formed in the central portion of the lower end thereof. Then, the meshing teeth 38A are formed on the inner surface of one side (rear side in the present embodiment) in the gap of the meshing portion 38.

したがって、図３に示されるように、噛合部３８の間隙内にタイミングベルト２８の前側が挿入され、その前側の噛合歯２８Ａが噛合歯３８Ａに噛み合うことにより、収容部材３０が噛合部３８を介してタイミングベルト２８に、その周回方向で固定されるようになっている。これにより、タイミングベルト２８の移動に伴い、収容部材３０がシャフト２２及び支持台１７に支持されつつ副走査方向及び復帰方向へ移動するようになっている。 Therefore, as shown in FIG. 3, the front side of the timing belt 28 is inserted into the gap of the meshing portion 38, and the meshing teeth 28A on the front side mesh with the meshing teeth 38A, so that the accommodating member 30 passes through the meshing portion 38. It is fixed to the timing belt 28 in the circumferential direction. As a result, as the timing belt 28 moves, the accommodating member 30 moves in the sub-scanning direction and the return direction while being supported by the shaft 22 and the support base 17.

なお、図２に示されるように、タイミングベルト２８よりも後側の筐体１２内には、読取装置本体５０で読み取った画像データを送るためのフレキシブルケーブル３６が配設されており、そのフレキシブルケーブル３６の一端部３６Ａは、読取装置本体５０に接続されている。そして、このフレキシブルケーブル３６は、読取装置本体５０を収容した収容部材３０の移動に追従可能になっている。 As shown in FIG. 2, a flexible cable 36 for sending the image data read by the reading device main body 50 is arranged in the housing 12 on the rear side of the timing belt 28, and the flexible cable 36 is arranged. One end 36A of the cable 36 is connected to the reading device main body 50. The flexible cable 36 can follow the movement of the accommodating member 30 accommodating the reading device main body 50.

＜第１実施形態＞
ここで、第１実施形態に係るガイド部材４０について詳細に説明する。図３〜図５に示されるように、このガイド部材４０は、シャフト２２との摺動性が良好な樹脂材の一例であるポリアセタール（ＰＯＭ）で成形されており、収容部材３０の底壁３２の下面側における長手方向略中央部に、図示しないビス等の締結具によって取り付けられている。したがって、図６に示されるように、ガイド部材４０の予め決められた複数（例えば４つ）の位置には、ビス等の締結具を通す孔部４１が形成されている。 <First Embodiment>
Here, the guide member 40 according to the first embodiment will be described in detail. As shown in FIGS. 3 to 5, the guide member 40 is formed of polyacetal (POM), which is an example of a resin material having good slidability with the shaft 22, and the bottom wall 32 of the accommodating member 30. It is attached to a substantially central portion in the longitudinal direction on the lower surface side of the above surface by fasteners such as screws (not shown). Therefore, as shown in FIG. 6, holes 41 through which fasteners such as screws are passed are formed at a plurality (for example, four) positions of the guide member 40.

また、ガイド部材４０には、シャフト２２の軸方向に延在する凹溝部４２が形成されており、図６、図７（Ｂ）に示されるように、凹溝部４２内の副走査方向における上流側端部には、その副走査方向から見て略逆「Ｕ」字状となる第１受部４４が一体に形成されている。そして、図３、図５〜図７（Ａ）に示されるように、凹溝部４２内の副走査方向における下流側端部には、その副走査方向から見て略逆「Ｖ」字状となる第２受部４６が一体に形成されている。 Further, the guide member 40 is formed with a concave groove portion 42 extending in the axial direction of the shaft 22, and as shown in FIGS. 6 and 7 (B), upstream in the concave groove portion 42 in the sub-scanning direction. A first receiving portion 44 having a substantially inverted "U" shape when viewed from the sub-scanning direction is integrally formed at the side end portion. Then, as shown in FIGS. 3, 5 to 7 (A), the downstream end portion in the concave groove portion 42 in the sub-scanning direction has a substantially inverted "V" shape when viewed from the sub-scanning direction. The second receiving portion 46 is integrally formed.

この凹溝部４２内における第１受部４４及び第２受部４６が、それぞれシャフト２２の外周面に上方から載せられることで、収容部材３０の長手方向略中央部がシャフト２２に支持されている。そして、第１受部４４は、図７（Ｂ）に示されるように、副走査方向から見て、シャフト２２の外周面に周方向の１点で接触する曲面接触部４５を有しており、第２受部４６は、図７（Ａ）に示されるように、副走査方向から見て、シャフト２２の外周面に周方向の２点で接触する一対の平面接触部４７を有している。 The first receiving portion 44 and the second receiving portion 46 in the concave groove portion 42 are respectively placed on the outer peripheral surface of the shaft 22 from above, so that the substantially central portion of the accommodating member 30 in the longitudinal direction is supported by the shaft 22. .. Then, as shown in FIG. 7B, the first receiving portion 44 has a curved contact portion 45 that contacts the outer peripheral surface of the shaft 22 at one point in the circumferential direction when viewed from the sub-scanning direction. As shown in FIG. 7A, the second receiving portion 46 has a pair of plane contact portions 47 that come into contact with the outer peripheral surface of the shaft 22 at two points in the circumferential direction when viewed from the sub-scanning direction. There is.

詳細に説明すると、図６、図７（Ｂ）に示されるように、第１受部４４は、副走査方向から見て、シャフト２２の曲率よりも小さい曲率とされた（シャフト２２の曲率半径よりも大きい曲率半径とされた）円弧面４４Ａを有しており、その円弧面４４Ａにおける最上端部が、シャフト２２の外周面における最上端部に接触する曲面接触部４５とされている。 More specifically, as shown in FIGS. 6 and 7B, the first receiving portion 44 has a curvature smaller than the curvature of the shaft 22 when viewed from the sub-scanning direction (radius of curvature of the shaft 22). It has an arcuate surface 44A (with a larger radius of curvature), and the uppermost end of the arcuate surface 44A is a curved contact portion 45 that contacts the uppermost end of the outer peripheral surface of the shaft 22.

一方、図６、図７（Ａ）に示されるように、第２受部４６は、副走査方向から見て、予め決められた角度で傾斜し、かつシャフト２２の中心を通る鉛直方向の直線に対して線対称となる一対の傾斜面４６Ａを有しており、各傾斜面４６Ａにおける一部が、それぞれシャフト２２の外周面における上部側に接触する平面接触部４７とされている。 On the other hand, as shown in FIGS. 6 and 7A, the second receiving portion 46 is inclined at a predetermined angle when viewed from the sub-scanning direction, and is a straight line in the vertical direction passing through the center of the shaft 22. It has a pair of inclined surfaces 46A that are line-symmetrical with respect to the shaft, and a part of each inclined surface 46A is a plane contact portion 47 that contacts the upper side of the outer peripheral surface of the shaft 22.

また、図６に示されるように、ガイド部材４０には、凹溝部４２の外側に、その凹溝部４２（第１受部４４及び第２受部４６）を補強するための複数枚（例えば８枚）のリブ４３が一体に形成されている。なお、図７に示されるように、各リブ４３は、直角三角形状に形成されているが、この形状に限定されるものではない。 Further, as shown in FIG. 6, the guide member 40 has a plurality of pieces (for example, 8) for reinforcing the concave groove portion 42 (first receiving portion 44 and second receiving portion 46) on the outside of the concave groove portion 42. The ribs 43 of the sheet) are integrally formed. As shown in FIG. 7, each rib 43 is formed in a right-angled triangular shape, but is not limited to this shape.

また、タイミングベルト２８は、可能な限りシャフト２２に近づけた方が、収容部材３０の移動精度向上のためには望ましい。したがって、図３、図５に示されるように、タイミングベルト２８が配設される側（後側）のリブ４３は、噛合部３８に干渉しないように、それとは反対側（前側）のリブ４３よりも小さく形成されている。 Further, it is desirable that the timing belt 28 is as close to the shaft 22 as possible in order to improve the moving accuracy of the accommodating member 30. Therefore, as shown in FIGS. 3 and 5, the rib 43 on the side (rear side) on which the timing belt 28 is arranged is the rib 43 on the opposite side (front side) so as not to interfere with the meshing portion 38. Is formed smaller than.

以上のような構成とされた第１実施形態に係るガイド部材４０を備えた画像読取装置１０において、次にその作用（読取装置本体５０（収容部材３０）の副走査方向への移動）について説明する。 In the image reading device 10 provided with the guide member 40 according to the first embodiment having the above configuration, the operation (movement of the reading device main body 50 (accommodating member 30) in the sub-scanning direction) will be described next. do.

原稿台１４に原稿を載せ、カバー体１６を閉じた後、図示しない操作パネルを操作することにより、原稿の読み取りが開始される。すなわち、読取装置本体５０を収容した収容部材３０が副走査方向へ移動する。ここで、ガイド部材４０の副走査方向下流側端部には、第２受部４６が形成されており、副走査方向から見て、その第２受部４６における一対の平面接触部４７が、シャフト２２の外周面にそれぞれ点接触している（図７（Ａ）参照）。 After placing the original on the platen 14 and closing the cover 16, the reading of the original is started by operating an operation panel (not shown). That is, the accommodating member 30 accommodating the reading device main body 50 moves in the sub-scanning direction. Here, a second receiving portion 46 is formed at the downstream end of the guide member 40 in the sub-scanning direction, and a pair of plane contact portions 47 in the second receiving portion 46 when viewed from the sub-scanning direction. The outer peripheral surfaces of the shaft 22 are in point contact with each other (see FIG. 7A).

つまり、第２受部４６は、一対の平面接触部４７によって、シャフト２２に周方向の２点で接触している。したがって、ガイド部材４０（第２受部４６）は、シャフト２２に位置精度よく（平面視でシャフト２２の軸方向と交差する方向へずれることなく）支持される。よって、シャフト２２に沿って副走査方向へ移動するときの読取装置本体５０（収容部材３０）のがたつき（振動）が抑制又は防止される。 That is, the second receiving portion 46 is in contact with the shaft 22 at two points in the circumferential direction by the pair of plane contact portions 47. Therefore, the guide member 40 (second receiving portion 46) is supported by the shaft 22 with high positional accuracy (without shifting in a direction intersecting the axial direction of the shaft 22 in a plan view). Therefore, rattling (vibration) of the reading device main body 50 (accommodating member 30) when moving along the shaft 22 in the sub-scanning direction is suppressed or prevented.

しかも、ガイド部材４０の副走査方向上流側端部には、第１受部４４が形成されており、副走査方向から見て、その第１受部４４における曲面接触部４５が、シャフト２２の外周面に周方向の１点で点接触している（図７（Ｂ）参照）。したがって、ガイド部材４０の成形上の誤差により、第１受部４４と第２受部４６とにおいて、シャフト２２の軸方向と交差する方向の位置がずれていても、第１受部４４によって、そのずれが許容される。 Moreover, a first receiving portion 44 is formed at the upstream end portion of the guide member 40 in the sub-scanning direction, and the curved surface contact portion 45 in the first receiving portion 44 is formed on the shaft 22 when viewed from the sub-scanning direction. It is in point contact with the outer peripheral surface at one point in the circumferential direction (see FIG. 7B). Therefore, even if the positions of the first receiving portion 44 and the second receiving portion 46 in the direction intersecting the axial direction of the shaft 22 are deviated due to a molding error of the guide member 40, the first receiving portion 44 causes the first receiving portion 44. The deviation is acceptable.

換言すれば、ガイド部材４０の成形上の誤差により、第１受部４４と第２受部４６とにおいて、シャフト２２の軸方向と交差する方向の位置がずれていても、平面視でシャフト２２に対してガイド部材４０（収容部材３０）が傾くことがない。よって、シャフト２２に沿って副走査方向へ移動するときの読取装置本体５０（収容部材３０）のがたつき（振動）が抑制又は防止される。つまり、読取装置本体５０を収容した収容部材３０は、副走査方向へスムーズに移動する。 In other words, even if the positions of the first receiving portion 44 and the second receiving portion 46 in the direction intersecting the axial direction of the shaft 22 are deviated due to a molding error of the guide member 40, the shaft 22 is viewed in a plan view. The guide member 40 (accommodating member 30) does not tilt with respect to the guide member 40. Therefore, rattling (vibration) of the reading device main body 50 (accommodating member 30) when moving along the shaft 22 in the sub-scanning direction is suppressed or prevented. That is, the accommodating member 30 accommodating the reading device main body 50 smoothly moves in the sub-scanning direction.

＜第２実施形態＞
次に、第２実施形態に係るガイド部材４０について詳細に説明する。なお、第１実施形態に係るガイド部材４０と同等の部位には、同じ符号を付して詳細な説明（共通する作用も含む）は適宜省略する。 <Second Embodiment>
Next, the guide member 40 according to the second embodiment will be described in detail. The same parts as those of the guide member 40 according to the first embodiment are designated by the same reference numerals, and detailed description (including common actions) will be omitted as appropriate.

図８、図９に示されるように、このガイド部材４０は、一対の平面接触部４７（図１０参照）を有する第２受部４６が、シャフト２２の軸方向において、副走査方向の下流側端部だけではなく、噛合部３８と重なる（オーバーラップする）位置にも形成されている。つまり、このガイド部材４０には、一対の平面接触部４７が複数組（２組）形成されている。 As shown in FIGS. 8 and 9, in the guide member 40, the second receiving portion 46 having a pair of plane contact portions 47 (see FIG. 10) is on the downstream side in the sub-scanning direction in the axial direction of the shaft 22. It is formed not only at the end portion but also at a position where it overlaps (overlaps) with the meshing portion 38. That is, a plurality of sets (two sets) of a pair of plane contact portions 47 are formed on the guide member 40.

このような構成のガイド部材４０にすれば、シャフト２２に更に位置精度よく（平面視でシャフト２２の軸方向と交差する方向へずれることなく）支持されるので、シャフト２２に沿って副走査方向へ移動するときの読取装置本体５０（収容部材３０）のがたつき（振動）が更に抑制又は防止される。 If the guide member 40 has such a configuration, it is supported by the shaft 22 with higher positional accuracy (without shifting in the direction intersecting the axial direction of the shaft 22 in a plan view), so that the sub-scanning direction is along the shaft 22. The rattling (vibration) of the reading device main body 50 (accommodating member 30) when moving to is further suppressed or prevented.

なお、第２受部４６の副走査方向から見た形状は、略逆「Ｖ」字状に限定されるものではなく、例えば図１０に示されるような形状とされてもよい。すなわち、一対の平面接触部４７の間における第２受部４６の最上端部が、シャフト２２の外周面における最上端部に非接触な平坦面４６Ｂ（図８、図９も参照）とされた形状とされてもよい。 The shape of the second receiving portion 46 when viewed from the sub-scanning direction is not limited to a substantially inverted “V” shape, and may be, for example, a shape as shown in FIG. That is, the uppermost end portion of the second receiving portion 46 between the pair of plane contact portions 47 is a flat surface 46B (see also FIGS. 8 and 9) that is not in contact with the uppermost end portion on the outer peripheral surface of the shaft 22. It may be shaped.

また、第２受部４６、即ち一対の平面接触部４７は、シャフト２２の軸方向において、噛合部３８から（噛合部３８を含む）副走査方向下流側の領域に少なくとも１組形成されていればよく、特に凹溝部４２内（ガイド部材４０）における副走査方向下流側端部に少なくとも形成されることが望ましい。 Further, at least one set of the second receiving portion 46, that is, the pair of plane contact portions 47 is formed in the region downstream from the meshing portion 38 (including the meshing portion 38) in the sub-scanning direction in the axial direction of the shaft 22. In particular, it is desirable that the groove portion 42 is formed at least at the downstream end portion in the sub-scanning direction in the recessed groove portion 42 (guide member 40).

また、第１受部４４、即ち曲面接触部４５は、シャフト２２の軸方向において、噛合部３８よりも（噛合部３８を除く）副走査方向上流側の領域に少なくとも１つ形成されていればよい。つまり、ガイド部材４０には、第２受部４６だけではなく、第１受部４４と第２受部４６の両方が形成されることが望ましい。 Further, if at least one first receiving portion 44, that is, the curved surface contact portion 45 is formed in the region upstream of the meshing portion 38 (excluding the meshing portion 38) in the sub-scanning direction in the axial direction of the shaft 22. good. That is, it is desirable that the guide member 40 is formed not only with the second receiving portion 46 but also with both the first receiving portion 44 and the second receiving portion 46.

以上、本実施形態に係る画像読取装置１０について図面を基に説明したが、本実施形態に係る画像読取装置１０は、図示のものに限定されるものではなく、本発明の要旨を逸脱しない範囲内において適宜設計変更可能なものである。例えば、収容部材３０を移動させる移動部材は、タイミングベルト２８に限定されるものではないし、移動部材に固定される固定部も、タイミングベルト２８に噛合される噛合部３８に限定されるものではない。
なお、本願の原出願における分割直前の[特許請求の範囲]及び[発明の効果]に記載の事項は、以下の通りである。
［請求項１］
原稿台に載せられた原稿を読み取る読取装置本体と、
前記読取装置本体を収容し、前記原稿を読み取るときに、円柱状の案内部材に下方から支持されて前記原稿の一端部から他端部へ移動する収容部材と、
前記収容部材に形成され、該収容部材を移動させるための移動部材に固定された固定部と、
前記収容部材の長手方向略中央部に設けられ、前記収容部材の移動方向から見て、前記案内部材に周方向の２点で接触する一対の平面接触部が、前記案内部材の軸方向において、前記固定部から前記原稿を読み取るときの前記収容部材の移動方向下流側の領域に形成された被案内部材と、
を備え、
前記被案内部材は、前記収容部材の移動方向から見て、前記案内部材に周方向の１点で接触する曲面接触部を有し、該曲面接触部が、前記案内部材の軸方向において、前記固定部よりも前記原稿を読み取るときの前記収容部材の移動方向上流側の領域に形成されている画像読取装置。
［請求項２］
前記一対の平面接触部は、前記被案内部材の少なくとも前記移動方向下流側端部に形成されている請求項１に記載の画像読取装置。
［請求項３］
前記被案内部材は、前記一対の平面接触部を複数組有し、そのうちの１組が、前記案内部材の軸方向において、前記固定部と重なる位置に形成されている請求項１又は請求項２に記載の画像読取装置。
［請求項４］
前記被案内部材は、前記案内部材の軸方向に延在するとともに前記平面接触部及び前記曲面接触部を有する凹溝部を備え、
前記凹溝部の外側に、該凹溝部を補強する複数のリブが形成されるとともに、前記移動部材側のリブが、それとは反対側のリブよりも小さく形成されている請求項１〜請求項３の何れか１項に記載の画像読取装置。
請求項１に記載の発明によれば、案内部材に周方向の２点で接触する一対の平面接触部が、案内部材の軸方向において、固定部から原稿を読み取るときの収容部材の移動方向下流側の領域に形成されていない構成に比べて、読取装置本体を収容した収容部材の移動時のがたつきを抑制することができる。また、案内部材に周方向の１点で接触する曲面接触部が、案内部材の軸方向において、固定部よりも原稿を読み取るときの収容部材の移動方向上流側の領域に形成されていない構成に比べて、平面接触部と曲面接触部とが、成形上の誤差により、案内部材の軸方向と交差する方向にずれた場合でも、読取装置本体を収容した収容部材の移動時のがたつきを抑制することができる。
請求項２に記載の発明によれば、一対の平面接触部が、被案内部材における収容部材の移動方向下流側端部に形成されていない構成に比べて、読取装置本体を収容した収容部材の移動時のがたつきを抑制することができる。
請求項３に記載の発明によれば、複数組形成された一対の平面接触部のうちの１組が、案内部材の軸方向において、固定部と重なる位置に形成されていない構成に比べて、読取装置本体を収容した収容部材の移動時のがたつきを抑制することができる。
請求項４に記載の発明によれば、移動部材側のリブが、それとは反対側のリブよりも小さく形成されていない構成に比べて、固定部に干渉することなく、凹溝部を補強することができる。
本開示の第９の態様に係る画像読取装置は、原稿台に載せられた原稿を読み取る読取装置本体と、前記読取装置本体を収容し、前記原稿を読み取るときに、円柱状の案内部材に下方から支持されて前記原稿の一端部から他端部へ移動する収容部材と、前記収容部材の底の下面側に締結具によって締結され、摺動性が良い樹脂を含んで構成され、前記案内部材に接触する接触部を有する被案内部材と、を備えている。
本開示の第１０の態様に係る画像読取装置は、前記被案内部材は、前記原稿を読み取るときの移動方向における上流側で前記案内部材に接触する上流側接触部と前記移動方向における下流側で前記案内部材に接触する下流側接触部とを有する。
本開示の第１１の態様に係る画像読取装置は、前記上流側接触部と前記下流側接触部とは、一体に形成されている。
本開示の第１２の態様に係る画像読取装置は、前記締結具は、前記上流側接触部よりも前記移動方向における下流側に配置されている。
本開示の第１３の態様に係る画像読取装置は、前記締結具は、前記移動方向における前記上流側接触部と前記下流側接触部との間に配置されている。
本開示の第１４の態様に係る画像読取装置は、前記被案内部材は、前記移動方向における前記下流側接触部よりも下流側において、前記締結具とは異なる締結具によって前記収容部材の底の下面側に、締結されている。
本開示の第１５の態様に係る画像読取装置は、前記締結具は、前記原稿を読み取るときの移動方向における、互いに異なる位置に複数設けられている。
本開示の第１６の態様に係る画像読取装置は、前記収容部材は、前記収容部材を移動させるための移動部材に固定された固定部を備え、前記固定部と前記被案内部材とは別体として形成されている。
本開示の第１７の態様に係る画像読取装置は、前記収容部材は、前記移動方向における上流側に、前記移動方向に向けた壁面を有する壁部を有し、前記移動方向における前記上流側接触部と前記壁部との間を連結する支持部を有する。
本開示の第１８の態様に係る画像読取装置は、前記上流側接触部と前記下流側接触部とで前記案内部材に接触する箇所の個数は互いに異なる。
本開示の第１９の態様に係る画像読取装置は、前記被案内部材はポリアセタールを含んで構成されている。
本開示の第２０の態様に係る画像読取装置は、前記読取装置本体に取り付けられ、前記原稿台に接することで前記読取装置本体の高さ方向の位置決めがされる凸部を備えている。
本開示の第９〜第２０の態様に係る画像読取装置は、読取装置本体を収容した収容部材の移動時のがたつきを抑制できる画像読取装置を得ることを目的とする。 Although the image reading device 10 according to the present embodiment has been described above with reference to the drawings, the image reading device 10 according to the present embodiment is not limited to the one shown in the drawing and does not deviate from the gist of the present invention. The design can be changed as appropriate within. For example, the moving member that moves the accommodating member 30 is not limited to the timing belt 28, and the fixing portion fixed to the moving member is not limited to the meshing portion 38 that is meshed with the timing belt 28. ..
The matters described in [Claims] and [Effects of the Invention] immediately before the division in the original application of the present application are as follows.
[Claim 1]
The main body of the reader that reads the document placed on the platen, and
When the reading device main body is accommodated and the document is read, the accommodating member that is supported from below by the columnar guide member and moves from one end to the other end of the document.
A fixing portion formed on the accommodating member and fixed to the moving member for moving the accommodating member,
A pair of plane contact portions provided at substantially the center of the accommodating member in the longitudinal direction and in contact with the guide member at two points in the circumferential direction when viewed from the moving direction of the accommodating member are formed in the axial direction of the guide member. A guided member formed in a region on the downstream side in the moving direction of the accommodating member when the original document is read from the fixed portion, and a guided member.
With
The guided member has a curved surface contact portion that contacts the guide member at one point in the circumferential direction when viewed from the moving direction of the accommodating member, and the curved surface contact portion is the axial direction of the guide member. An image reading device formed in a region on the upstream side in the moving direction of the accommodating member when reading the original document from the fixed portion.
[Claim 2]
The image reading device according to claim 1, wherein the pair of plane contact portions are formed at least at the downstream end portion in the moving direction of the guided member.
[Claim 3]
The guided member has a plurality of sets of the pair of plane contact portions, and one set thereof is formed at a position overlapping the fixed portion in the axial direction of the guide member according to claim 1 or 2. The image reader according to the above.
[Claim 4]
The guided member includes a concave groove portion extending in the axial direction of the guide member and having the plane contact portion and the curved surface contact portion.
Claims 1 to 3 in which a plurality of ribs for reinforcing the concave groove portion are formed on the outside of the concave groove portion, and the rib on the moving member side is formed smaller than the rib on the opposite side. The image reading device according to any one of the above.
According to the first aspect of the present invention, a pair of plane contact portions that come into contact with the guide member at two points in the circumferential direction are downstream in the moving direction of the accommodating member when the original is read from the fixed portion in the axial direction of the guide member. Compared with the configuration not formed in the side region, it is possible to suppress rattling when the accommodating member accommodating the reading device main body is moved. Further, the curved surface contact portion that contacts the guide member at one point in the circumferential direction is not formed in the region on the upstream side of the moving direction of the accommodating member when reading the original, rather than the fixed portion in the axial direction of the guide member. In comparison, even if the flat contact portion and the curved contact portion deviate in the direction intersecting the axial direction of the guide member due to a molding error, the accommodating member accommodating the reading device main body rattles when moving. It can be suppressed.
According to the second aspect of the present invention, as compared with the configuration in which the pair of plane contact portions are not formed at the downstream end portion of the guided member in the moving direction of the accommodating member, the accommodating member accommodating the reading device main body. It is possible to suppress rattling during movement.
According to the third aspect of the present invention, as compared with the configuration in which one set of the pair of plane contact portions formed in a plurality of sets is not formed at a position overlapping the fixed portion in the axial direction of the guide member. It is possible to suppress rattling when the accommodating member accommodating the reading device main body is moved.
According to the invention of claim 4, the concave groove portion is reinforced without interfering with the fixed portion, as compared with the configuration in which the rib on the moving member side is not formed smaller than the rib on the opposite side. Can be done.
The image reading device according to the ninth aspect of the present disclosure accommodates a reading device main body for reading a document placed on a platen and the reading device main body, and when the original is read, it is lowered to a columnar guide member. A housing member that is supported by the document and moves from one end to the other end of the document, and a resin that is fastened to the lower surface side of the bottom of the housing member by a fastener and has good slidability. It is provided with a guided member having a contact portion that comes into contact with the device.
In the image reading device according to the tenth aspect of the present disclosure, the guided member is on the upstream side in the moving direction when reading the original, and on the upstream contact portion that contacts the guide member and on the downstream side in the moving direction. It has a downstream contact portion that comes into contact with the guide member.
In the image reading device according to the eleventh aspect of the present disclosure, the upstream contact portion and the downstream contact portion are integrally formed.
In the image reading device according to the twelfth aspect of the present disclosure, the fastener is arranged on the downstream side in the moving direction with respect to the upstream side contact portion.
In the image reading device according to the thirteenth aspect of the present disclosure, the fastener is arranged between the upstream contact portion and the downstream contact portion in the moving direction.
In the image reading device according to the fourteenth aspect of the present disclosure, the guided member is located on the downstream side of the downstream contact portion in the moving direction by a fastener different from the fastener at the bottom of the accommodating member. It is fastened to the lower surface side.
In the image reading device according to the fifteenth aspect of the present disclosure, a plurality of the fasteners are provided at positions different from each other in the moving direction when reading the original.
In the image reading device according to the sixteenth aspect of the present disclosure, the accommodating member includes a fixing portion fixed to a moving member for moving the accommodating member, and the fixing portion and the guided member are separate bodies. Is formed as.
In the image reading device according to the seventeenth aspect of the present disclosure, the accommodating member has a wall portion having a wall surface facing the moving direction on the upstream side in the moving direction, and the upstream contact in the moving direction. It has a support portion that connects the portion and the wall portion.
In the image reading device according to the eighteenth aspect of the present disclosure, the number of portions of the upstream contact portion and the downstream contact portion that come into contact with the guide member is different from each other.
In the image reading device according to the nineteenth aspect of the present disclosure, the guided member is configured to include polyacetal.
The image reading device according to the twentieth aspect of the present disclosure includes a convex portion that is attached to the reading device main body and is positioned in the height direction of the reading device main body by coming into contact with the platen.
An object of the image reading device according to the ninth to twentieth aspects of the present disclosure is to obtain an image reading device capable of suppressing rattling when the accommodating member accommodating the reading device main body is moved.

１０画像読取装置
１４原稿台
２２シャフト（案内部材の一例）
２８タイミングベルト（移動部材の一例）
３０収容部材
３８噛合部（固定部の一例）
４０ガイド部材（被案内部材の一例）
４５曲面接触部
４７平面接触部
５０読取装置本体 10 Image reader 14 Document stand 22 Shaft (an example of guide member)
28 Timing belt (an example of moving member)
30 Accommodating member 38 Engagement part (example of fixed part)
40 Guide member (an example of guided member)
45 Curved surface contact part 47 Flat surface contact part 50 Reader body

Claims

A housing in which a member for reading a document is mounted and moved from one end to the other end of the document when the document placed on the platen is read, and is supported by a columnar guide member from below. A housing that moves from one end to the other of the document,
A guided member that is fastened to the lower surface side of the bottom of the housing by a fastener, is configured to contain a resin having good slidability, and has a contact portion that comes into contact with the guide member.
With
The guided member has an upstream contact portion that contacts the guide member on the upstream side in the moving direction when reading the document, and a downstream contact portion that contacts the guide member on the downstream side in the moving direction. ,
The upstream contact portion and the downstream contact portion are integrally formed.
An image reading device in which two fasteners are arranged along the moving direction between the upstream contact portion and the downstream contact portion in the moving direction.

The guided member according to claim 1, wherein the guided member is fastened to the lower surface side of the bottom of the housing by a fastener different from the fastener on the downstream side of the downstream contact portion in the moving direction. Image reader.

The image reading device according to claim 1 or 2, wherein a plurality of fasteners are provided at positions different from each other in a moving direction when reading the original.

The first to third aspects of the present invention, wherein the housing includes a fixing portion fixed to a moving member for moving the housing, and the fixing portion and the guided member are formed as separate bodies. The image reading device according to any one of the following items.

The housing has a wall portion having a wall surface facing the moving direction on the upstream side in the moving direction.
The image reading device according to any one of claims 1 to 4, further comprising a support portion that connects the upstream contact portion and the wall portion in the moving direction.

The image reading device according to any one of claims 1 to 5, wherein the number of portions of the upstream contact portion and the downstream contact portion that come into contact with the guide member is different from each other.

The image reading device according to any one of claims 1 to 6, wherein the guided member includes polyacetal.

7. Image reader.