JP2016024266A - Image reading apparatus - Google Patents

Image reading apparatus Download PDF

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JP2016024266A
JP2016024266A JP2014146871A JP2014146871A JP2016024266A JP 2016024266 A JP2016024266 A JP 2016024266A JP 2014146871 A JP2014146871 A JP 2014146871A JP 2014146871 A JP2014146871 A JP 2014146871A JP 2016024266 A JP2016024266 A JP 2016024266A
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image reading
state
rotation shaft
document
reading apparatus
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JP6399289B2 (en
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久幸 赤羽
Hisayuki Akaha
久幸 赤羽
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Seiko Epson Corp
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Seiko Epson Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an image reading apparatus configured to properly press a document regardless of an attitude of the apparatus.SOLUTION: An image reading apparatus 10 includes: a housing having a document platen on which a document is placed and reading means of reading a document placed on the document platen; an opening/closing body 14 which is arranged in the housing turnably via a turning shaft 48 and turns to open/close the document platen; and turning shaft regulation means 60 which selects a first state that allows displacement of the turning shaft 48 moving in a direction crossing a document placing surface of the document platen or a second state that regulates the displacement. The turning shaft regulation means 60 selects the first state or the second state, according to an attitude of the housing with respect to an installation surface of the housing.SELECTED DRAWING: Figure 8

Description

本発明は、スキャナーに代表される画像読取装置に関する。   The present invention relates to an image reading apparatus represented by a scanner.

画像読取装置としてのスキャナー、その中でも特に原稿台ガラスの下を読取センサーが移動しながら画像の読取を行う所謂フラットベッド型のスキャナーにおいては、一般的に、原稿台ガラスを開閉するカバーが設けられている。スキャナーによっては、カバーに代えて自動原稿搬送装置（所謂ＡＤＦ）が原稿台ガラスを開閉する構成も見られるが、以下では原稿台ガラスをカバーが開閉する構成を例にして説明する。   In a scanner as an image reading device, and in particular, a so-called flatbed type scanner that reads an image while a reading sensor moves under the platen glass, a cover for opening and closing the platen glass is generally provided. ing. Depending on the scanner, an automatic document feeder (so-called ADF) may open and close the platen glass instead of the cover. Hereinafter, a configuration in which the cover opens and closes the platen glass will be described as an example.

カバーの裏側、即ち原稿台ガラスと対向する側には、特許文献１に示されるようにスポンジなどの弾性材で構成された原稿押さえが設けられ、カバーを閉じた際に、原稿押さえによって原稿を均等に押圧して良好な読み取り結果が得られる様に構成されている。   On the back side of the cover, that is, on the side facing the platen glass, there is provided a document press composed of an elastic material such as sponge as shown in Patent Document 1, and when the cover is closed, the document is pressed by the document press. It is configured so that a good reading result can be obtained by pressing evenly.

しかしながら原稿には種々の厚みのものがあり、特に冊子などの場合には相応の厚みがあり、この様な厚みのある原稿の場合には、カバーの回動軸に近い位置では原稿を押圧できるが、回動軸から遠い位置では原稿を押圧できない場合がある。
そこでスキャナーによっては、特許文献２に示されるように、カバーの回動軸が上下方向（原稿台ガラスと直交する方向）に変位可能に設けられ、カバーの回動中心が原稿の厚みに応じて上下できるように構成されたものがある。 However, there are various thicknesses of originals, and in particular in the case of booklets, etc., there are appropriate thicknesses. In the case of such thick originals, the original can be pressed at a position close to the rotation axis of the cover. However, there are cases where the original cannot be pressed at a position far from the rotation axis.
Therefore, depending on the scanner, as disclosed in Patent Document 2, the rotation axis of the cover is provided so as to be displaceable in the vertical direction (direction orthogonal to the document table glass), and the rotation center of the cover depends on the thickness of the document. Some are configured to move up and down.

特開２００６−１８６７７１号公報JP 2006-186771 A 特開２００１−０４１２２６号公報JP 2001-041226 A

しかしながら、スキャナーが水平姿勢ではなく例えば傾斜姿勢に置かれると、例えば原稿の厚みが薄いにも拘わらず、カバーの回動軸がカバーと原稿台との間隔を拡げる方向に動いてしまい、原稿を適切に押圧できない場合が生じる。   However, if the scanner is placed in an inclined position instead of a horizontal position, for example, although the thickness of the document is thin, the rotation axis of the cover moves in a direction that widens the distance between the cover and the document table, and the document is There are cases where it cannot be pressed properly.

特に、スキャナーにおいては設置面積の節約を目的として、特許文献１に示される様に装置を傾斜した姿勢に保持するスタンドを備え、傾斜姿勢のままで使用可能に構成されたものがある。この様にスキャナーが極端な傾斜姿勢になると、上述した不具合はより一層生じ易くなる。   In particular, some scanners include a stand for holding the apparatus in an inclined posture as shown in Patent Document 1 for the purpose of saving an installation area, and can be used in an inclined posture. When the scanner is in an extremely inclined posture in this way, the above-described problems are more likely to occur.

そこで本発明はこの様な状況に鑑みなされたものであり、その目的は、装置の姿勢に拘わらず適切に原稿を押圧できる構成を備えた画像読取装置を提供することにある。   Accordingly, the present invention has been made in view of such a situation, and an object thereof is to provide an image reading apparatus having a configuration capable of appropriately pressing a document regardless of the posture of the apparatus.

上記課題を解決する為に、本発明の第1の態様に係る画像読取装置は、原稿を載置する原稿台および当該原稿台に載置された原稿を読み取る読み取り手段が設けられた筐体と、回動軸を介して前記筐体に回動可能に設けられ、回動することにより前記原稿台を開閉する開閉体と、前記原稿台の原稿載置面に対して交差する方向への前記回動軸の変位を許容する第1状態と、前記変位を規制する第２状態と、を切り換え可能な回動軸規制手段とを備えたことを特徴とする。   In order to solve the above problems, an image reading apparatus according to a first aspect of the present invention includes a document table on which a document is placed, and a casing provided with a reading unit that reads the document placed on the document table. An opening / closing body that is rotatably provided on the housing via a rotation shaft, and opens and closes the document table by rotating; and the direction in the direction intersecting the document placement surface of the document table. Rotating shaft restricting means capable of switching between a first state in which displacement of the rotating shaft is allowed and a second state in which the displacement is restricted is provided.

本態様によれば、画像読取装置は原稿台を開閉する開閉体の回動軸の変位を許容する第1状態と、前記変位を規制する第２状態と、を切り換え可能な回動軸規制手段を備えているので、前記回動軸規制手段を前記第１状態とすることで、原稿の厚みに応じて前記原稿台に載置された原稿を、前記開閉体によって適切に押さえることができる。また、前記回動軸規制手段を前記第２状態とすることで、装置の姿勢に影響されず、適切に原稿を押さえることができる。   According to this aspect, the image reading apparatus is capable of switching between the first state that allows the displacement of the rotation shaft of the opening / closing body that opens and closes the document table and the second state that restricts the displacement. Therefore, by setting the rotation shaft restricting means to the first state, the document placed on the document table can be appropriately pressed by the opening / closing body according to the thickness of the document. In addition, by setting the rotation shaft restricting means to the second state, it is possible to appropriately hold down the document without being influenced by the posture of the apparatus.

本発明の第２の態様は、第１の態様において、前記回動軸規制手段は、前記筐体の設置面に対する前記筐体の姿勢に応じて前記第1状態と前記第２状態とを切り換えることを特徴とする。   According to a second aspect of the present invention, in the first aspect, the rotation shaft restricting means switches between the first state and the second state in accordance with a posture of the casing with respect to an installation surface of the casing. It is characterized by that.

本態様によれば、前記回動軸規制手段は、前記筐体の設置面に対する前記筐体の姿勢に応じて前記第1状態と前記第２状態とを切り換えるので、装置の姿勢に影響されず、前記原稿台に載置された原稿を、前記開閉体によって適切に押さえることができる。   According to this aspect, the rotation axis restricting means switches between the first state and the second state according to the posture of the housing with respect to the installation surface of the housing, so that it is not affected by the posture of the device. The document placed on the document table can be appropriately pressed by the opening / closing body.

本発明の第３の態様は、第２の態様において、前記回動軸規制手段は、前記設置面に対して前記筐体の裏側が接した場合に前記第１状態をとり、前記設置面に対して前記筐体の裏側が離れた場合に前記第２状態をとることを特徴とする。   According to a third aspect of the present invention, in the second aspect, the rotation shaft restricting means takes the first state when the back side of the housing is in contact with the installation surface, and On the other hand, the second state is taken when the back side of the casing is separated.

本態様によれば、前記回動軸規制手段は、前記設置面に対して前記筐体の裏側が接した場合に前記第１状態をとり、前記設置面に対して前記筐体の裏側が離れた場合に前記第２状態をとるので、前記設置面に対して前記筐体の裏側が離れた場合に前記回動軸が不用意に動くことを防止できる。その結果、装置の姿勢に影響されず、前記原稿台に載置された原稿を、前記開閉体によって適切に押さえることができ、或いは、装置を持ち運ぶ際に、前記開閉体が意図せず外れてしまうことを防止できる。   According to this aspect, the rotation axis restricting means takes the first state when the back side of the casing is in contact with the installation surface, and the back side of the casing is separated from the installation surface. In this case, since the second state is taken, it is possible to prevent the rotating shaft from inadvertently moving when the back side of the housing is separated from the installation surface. As a result, the document placed on the document table can be appropriately pressed by the opening / closing body without being affected by the posture of the apparatus, or the opening / closing body is unintentionally detached when carrying the apparatus. Can be prevented.

本発明の第４の態様は、第３の態様において、前記回動軸は前記開閉体に設けられた回動軸部に設けられ、前記回動軸規制手段は、前記回動軸部から離間して前記第１状態を形成する離間位置と、前記回動軸部と係合して前記第２状態を形成する係合位置と、の間を変位可能に設けられた規制部材と、前記規制部材を前記係合位置に向けて付勢する付勢部材と、前記筐体の裏側から突出し、前記規制部材の前記係合位置への変位を許容する突出位置と、当該突出位置よりも前記筐体の内側に押し込まれ、前記規制部材の前記係合位置への変位を規制する押し込み位置と、の間を変位可能に設けられた部材と、を備えることを特徴とする。   According to a fourth aspect of the present invention, in the third aspect, the rotation shaft is provided in a rotation shaft portion provided in the opening / closing body, and the rotation shaft restricting means is separated from the rotation shaft portion. And a regulating member provided to be displaceable between a separation position that forms the first state and an engagement position that engages with the rotating shaft portion to form the second state, and the regulation A biasing member that biases the member toward the engaging position; a protruding position that protrudes from the back side of the housing; and allows the displacement of the restricting member to the engaging position; and And a push-in position that is pushed into the body and restricts the displacement of the restriction member to the engagement position, and a member that is displaceable.

本態様によれば、前記規制部材、前記付勢部材、前記変位可能に設けられた部材、のこれらによって、前記筐体の前記設置面に対する姿勢に応じて前記回動軸規制手段が前記第1状態と前記第２状態とを切り換える。即ち、特段のユーザー操作を必要とせず、前記回動軸規制手段が、前記筐体の姿勢に応じた適切な状態に切り換わり、これによりユーザーの操作性が向上する。   According to this aspect, the rotating shaft restricting means according to the posture of the casing with respect to the installation surface is configured by the restricting member, the biasing member, and the displaceable member. Switch between the state and the second state. That is, no special user operation is required, and the rotation shaft restricting means is switched to an appropriate state according to the posture of the casing, thereby improving user operability.

本発明の第５の態様は、第４の態様において、前記変位可能に設けられた部材はカム機構を有する部材であることを特徴とする。   According to a fifth aspect of the present invention, in the fourth aspect, the displaceable member is a member having a cam mechanism.

本発明の第６の態様は、第３の態様において、前記回動軸は前記開閉体に設けられた回動軸部に設けられ、前記回動軸規制手段は、前記回動軸部から離間して前記第１状態を形成する離間位置と、前記回動軸部と係合して前記第２状態を形成する係合位置と、の間を変位可能に設けられた規制部材と、前記規制部材を変位させる為の操作部と、を備えることを特徴とする。   According to a sixth aspect of the present invention, in the third aspect, the rotation shaft is provided in a rotation shaft portion provided in the opening / closing body, and the rotation shaft restricting means is separated from the rotation shaft portion. And a regulating member provided to be displaceable between a separation position that forms the first state and an engagement position that engages with the rotating shaft portion to form the second state, and the regulation And an operation unit for displacing the member.

本発明の第７の態様は、第１から第６の態様のいずれかにおいて、前記筐体は、前記回動軸を前記原稿載置面に対して交差する方向に案内する直線状の軸受け部を有することを特徴とする。   According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the casing is a linear bearing portion that guides the rotating shaft in a direction intersecting the document placement surface. It is characterized by having.

本発明の第８の態様は、第１から第７の態様のいずれかにおいて、前記筐体の設置面に対して前記筐体を傾斜姿勢に保持可能なスタンドを備え、前記筐体が前記傾斜姿勢に保持された状態において、前記開閉体は、鉛直方向と交差する方向である横方向に開閉することを特徴とする。   According to an eighth aspect of the present invention, there is provided the stand according to any one of the first to seventh aspects, further comprising a stand capable of holding the casing in an inclined posture with respect to an installation surface of the casing. In the state of being held in a posture, the opening / closing body opens and closes in a lateral direction that intersects the vertical direction.

本態様によれば、前記筐体が前記傾斜姿勢に保持された状態において、前記開閉体は、鉛直方向と交差する方向である横方向に開閉するので、前記開閉体の開いた状態を容易に保持することができ、前記原稿台への原稿載置の際の作業性が向上する。   According to this aspect, in the state where the casing is held in the inclined posture, the opening and closing body opens and closes in a lateral direction that intersects the vertical direction, so that the opening and closing body can be easily opened. Therefore, the workability when placing the document on the document table is improved.

本発明に係る画像読取装置において開閉体が閉じた状態を示す外観斜視図。1 is an external perspective view showing a state in which an opening / closing body is closed in an image reading apparatus according to the present invention. 画像読取装置において開閉体が開いた状態を示す外観斜視図。FIG. 3 is an external perspective view showing a state in which an opening / closing body is opened in the image reading apparatus. 画像読取装置における筐体内の構造を載置面側から見た平面図。The top view which looked at the structure in the housing | casing in an image reading apparatus from the mounting surface side. 画像読取装置の筐体における側断面図。FIG. 3 is a side sectional view of a housing of the image reading apparatus. 画像読取装置の傾斜姿勢を示す斜視図。The perspective view which shows the inclination attitude | position of an image reading apparatus. 画像読取装置における軸受け部の側断面図。FIG. 3 is a side sectional view of a bearing portion in the image reading apparatus. 画像読取装置において開閉体が開いた状態における軸受け部の側断面図。The side sectional view of a bearing part in the state where an opening-and-closing body opened in an image reading device. 画像読取装置における回動軸規制手段の第１状態を示す側面図。The side view which shows the 1st state of the rotating shaft control means in an image reading apparatus. 画像読取装置における回動軸規制手段の第２状態を示す側面図。The side view which shows the 2nd state of the rotating shaft control means in an image reading apparatus. 画像読取装置の傾斜姿勢において開閉体を開いた状態を示す斜視図。The perspective view which shows the state which opened the opening-closing body in the inclination attitude | position of an image reading apparatus. （Ａ）は回動軸規制手段の変更例における第１状態を示す概要図であり、（Ｂ）は回動軸規制手段の変更例における第２状態を示す概要図。(A) is a schematic diagram which shows the 1st state in the example of a change of a rotational axis control means, (B) is a schematic diagram which shows the 2nd state in the example of a change of a rotational axis control means.

以下、本発明の実施の形態を図面に基づいて説明する。尚、各実施例において同一の構成については、同一の符号を付し、最初の実施例においてのみ説明し、以後の実施例においてはその構成の説明を省略する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure in each Example, the same code | symbol is attached | subjected and it demonstrates only in the first Example, The description of the structure is abbreviate | omitted in a subsequent Example.

図１は本発明に係る画像読取装置において開閉体が閉じた状態を示す外観斜視図であり、図２は画像読取装置において開閉体が開いた状態を示す外観斜視図であり、図３は画像読取装置における筐体内の構造を載置面側から見た平面図であり、図４は画像読取装置の筐体における側断面図であり、図５は画像読取装置の傾斜姿勢を示す斜視図である。   FIG. 1 is an external perspective view showing a state in which an opening / closing body is closed in the image reading apparatus according to the present invention, FIG. 2 is an external perspective view showing a state in which the opening / closing body is opened in the image reading apparatus, and FIG. FIG. 4 is a plan view of the structure inside the housing of the reading device as viewed from the mounting surface side, FIG. 4 is a side cross-sectional view of the housing of the image reading device, and FIG. 5 is a perspective view showing an inclined posture of the image reading device. is there.

図６は画像読取装置における軸受け部の側断面図であり、図７は画像読取装置において開閉体が開いた状態における軸受け部の側断面図であり、図８は画像読取装置における回動軸規制手段の第１状態を示す側面図であり、図９は画像読取装置における回動軸規制手段の第２状態を示す側面図であり、図１０は画像読取装置の傾斜姿勢において開閉体を開いた状態を示す斜視図であり、図１１（Ａ）は回動軸規制手段の変更例における第１状態を示す概要図であり、図１１（Ｂ）は回動軸規制手段の変更例における第２状態を示す概要図である。   6 is a side sectional view of the bearing portion in the image reading device, FIG. 7 is a side sectional view of the bearing portion in a state where the opening / closing body is opened in the image reading device, and FIG. 8 is a rotation axis restriction in the image reading device. 9 is a side view showing a first state of the means, FIG. 9 is a side view showing a second state of the rotation shaft restricting means in the image reading apparatus, and FIG. FIG. 11A is a schematic diagram illustrating a first state in a modified example of the rotating shaft restricting means, and FIG. 11B is a second view in a modified example of the rotating shaft restricting means. It is a schematic diagram which shows a state.

各図において示すＸ−Ｙ−Ｚ座標系はＸ方向が画像読取部の走査方向かつ装置幅方向、Ｙ方向が画像読取部の移動方向かつ装置奥行き方向、Ｚ方向が原稿載置面に直交する方向を示している。尚、本明細書において＋Ｙ軸方向側を装置背面側とし、−Ｙ軸方向側を装置前面側とする。   In the XYZ coordinate system shown in each figure, the X direction is the scanning direction of the image reading unit and the apparatus width direction, the Y direction is the moving direction of the image reading unit and the apparatus depth direction, and the Z direction is orthogonal to the document placement surface. Shows direction. In this specification, the + Y-axis direction side is the apparatus back side, and the −Y-axis direction side is the apparatus front side.

■■■画像読取装置の概要■■■■
図１ないし図５を参照して、画像読取装置１０について説明する。画像読取装置１０は、筐体１２と、「開閉体」としてのカバー１４と、原稿台１６と、操作部１８と、案内部２０と、駆動機構２２と、「読み取り手段」としての画像読取部２４と、スタンド２６とを備えている。 ■■■ Overview of image reader ■■■■
The image reading apparatus 10 will be described with reference to FIGS. 1 to 5. The image reading apparatus 10 includes a housing 12, a cover 14 as an “opening / closing body”, a document table 16, an operation unit 18, a guide unit 20, a driving mechanism 22, and an image reading unit as “reading unit”. 24 and a stand 26 are provided.

図２に示すように筐体１２の上部には原稿台１６が設けられている。原稿台１６は、原稿載置面２８と、当該原稿載置面２８を取り囲むように配置された前面フレーム３０ａと、背面フレーム３０ｂと、側面フレーム３０ｃ、３０ｄとを備えている。これらのフレーム３０ａ、３０ｂ、３０ｃ、３０ｄは、原稿載置面２８の周囲を構成している。   As shown in FIG. 2, a document table 16 is provided on the top of the housing 12. The document table 16 includes a document placement surface 28, a front frame 30a disposed so as to surround the document placement surface 28, a back frame 30b, and side frames 30c and 30d. These frames 30 a, 30 b, 30 c, and 30 d constitute the periphery of the document placement surface 28.

また、本実施例において原稿載置面２８は平坦かつ透明なガラス板により構成されている。そして、原稿載置面２８には画像を読み取る原稿を載置可能である。つまり、原稿載置面２８は画像読取部２４により媒体の読み取りが可能な読取領域として構成されている。   In this embodiment, the document placement surface 28 is made of a flat and transparent glass plate. A document for reading an image can be placed on the document placement surface 28. That is, the document placement surface 28 is configured as a reading area in which the medium can be read by the image reading unit 24.

また、筐体１２において装置前面側（図１及び図２における−Ｙ軸方向側）には操作部１８が設けられている。操作部１８は、画像読取装置１０を操作するための電源スイッチや設定切換ボタン等を備えて構成されている。   An operation unit 18 is provided on the front side of the apparatus in the housing 12 (the −Y axis direction side in FIGS. 1 and 2). The operation unit 18 includes a power switch, a setting switch button, and the like for operating the image reading apparatus 10.

また、筐体１２において装置背面側（図１及び図２における＋Ｙ軸方向側）の端部にはカバー１４が筐体１２に対して回動可能に取り付けられている。カバー１４は、図１に示すように原稿台１６に対して閉じた姿勢と、図２に示すように原稿台１６に対して開いた姿勢とを切換可能に取り得る。また、カバー１４の原稿台１６と対向する側には、原稿押さえ部材３２が設けられている。原稿押さえ部材３２は例えばスポンジのような弾性体により構成されている。   Further, a cover 14 is attached to an end of the housing 12 on the back side of the apparatus (on the + Y-axis direction side in FIGS. 1 and 2) so as to be rotatable with respect to the housing 12. The cover 14 can be switched between a closed position with respect to the document table 16 as shown in FIG. 1 and an open position with respect to the document table 16 as shown in FIG. A document pressing member 32 is provided on the side of the cover 14 facing the document table 16. The document pressing member 32 is made of an elastic body such as a sponge, for example.

原稿押さえ部材３２は、カバー１４が原稿台１６に対して閉じた姿勢（図１参照）となった際、原稿台１６に設けられた原稿載置面２８に載置された原稿を当該原稿の被読取面と反対側から一様に押圧する。これにより、原稿押さえ部材３２により押圧された媒体の被読取面が原稿載置面２８に密着する。つまり、原稿押さえ部材３２は、原稿載置面２８から原稿が浮き上がることを防止できる。尚、原稿押さえ部材３２の大きさは、原稿載置面２８に載置される原稿において原稿載置面２８と反対側の面の全領域を押さえられるように原稿載置面２８の大きさと略同じ大きさに設定されている。   When the cover 14 is in a closed position with respect to the document table 16 (see FIG. 1), the document pressing member 32 is configured to read the document placed on the document placement surface 28 provided on the document table 16 on the document. Press uniformly from the side opposite to the surface to be read. As a result, the surface to be read of the medium pressed by the document pressing member 32 is in close contact with the document placement surface 28. That is, the document pressing member 32 can prevent the document from floating from the document placement surface 28. The size of the document pressing member 32 is substantially the same as the size of the document placement surface 28 so that the entire area of the document placed on the document placement surface 28 can be pressed on the entire area opposite to the document placement surface 28. They are set to the same size.

図３に示すように筐体１２内には、装置奥行き方向（図３におけるＹ軸方向）において装置前面側（図３における−Ｙ軸方向側）から装置背面側（図３における＋Ｙ軸方向側）に延びる案内部２０が設けられている。案内部２０において図３における＋Ｘ軸方向側の側面にはラック３４が形成されている。また、図４に示すように案内部２０の上面（図４における＋Ｚ軸方向側）には装置奥行き方向に延びる凸部３６が形成されている。   As shown in FIG. 3, in the housing 12, in the apparatus depth direction (Y-axis direction in FIG. 3), the apparatus front side (−Y-axis direction side in FIG. 3) to the apparatus back side (+ Y-axis direction side in FIG. 3). ) Is provided. A rack 34 is formed on the side surface on the + X axis direction side in FIG. Further, as shown in FIG. 4, a convex portion 36 extending in the apparatus depth direction is formed on the upper surface (+ Z-axis direction side in FIG. 4) of the guide portion 20.

そして、案内部２０には駆動機構２２及び画像読取部２４が装置奥行き方向（図３におけるＹ軸方向）に往復移動可能に取り付けられている。駆動機構２２は駆動モーター３８と、ピニオンギア４０と、凹部４２とを備えている。駆動モーター３８は、その駆動力を図示しない複数のギアを介してピニオンギア４０に伝達する。ピニオンギア４０は案内部２０のラック３４と噛合している。つまり、ラック３４とピニオンギア４０とはラックアンドピニオン機構を構成している。   A driving mechanism 22 and an image reading unit 24 are attached to the guide unit 20 so as to be capable of reciprocating in the apparatus depth direction (Y-axis direction in FIG. 3). The drive mechanism 22 includes a drive motor 38, a pinion gear 40, and a recess 42. The drive motor 38 transmits the driving force to the pinion gear 40 through a plurality of gears (not shown). The pinion gear 40 meshes with the rack 34 of the guide unit 20. That is, the rack 34 and the pinion gear 40 constitute a rack and pinion mechanism.

また、凹部４２（図４参照）は、案内部２０の凸部３６を受け入れている。図４に示すように原稿載置面２８と直交する方向において駆動機構２２の上部（図４における＋Ｚ軸方向側）には画像読取部２４が取り付けられている。画像読取部２４は、原稿載置面２８と直交する方向（図４におけるＺ軸方向）において上方側（＋Ｚ方向側）に位置する原稿載置面２８に載置された原稿に光を照射し、該原稿からの反射光を受光して原稿の情報を読み取る光学ユニットとして構成されている。また、画像読取部２４は、装置幅方向（図３及び図４におけるＸ軸方向）に延設されており、原稿載置面２８の装置幅方向における長さに対応している。   Moreover, the recessed part 42 (refer FIG. 4) has received the convex part 36 of the guide part 20. As shown in FIG. As shown in FIG. 4, an image reading unit 24 is attached to the upper portion (+ Z axis direction side in FIG. 4) of the drive mechanism 22 in the direction orthogonal to the document placement surface 28. The image reading unit 24 irradiates light on the document placed on the document placement surface 28 located on the upper side (+ Z direction side) in the direction orthogonal to the document placement surface 28 (Z-axis direction in FIG. 4). The optical unit is configured to receive reflected light from the original and read information on the original. The image reading unit 24 extends in the apparatus width direction (X-axis direction in FIGS. 3 and 4) and corresponds to the length of the document placement surface 28 in the apparatus width direction.

ここで、駆動機構２２の駆動モーター３８を駆動させると、その駆動力がピニオンギア４０に伝達される。そして、駆動機構２２は案内部２０の凸部３６に沿って画像読取部２４を装置奥行き方向（図３におけるＹ軸方向）に移動させ、原稿載置面２８に載置された原稿の被読取面の画像などの情報を読み取る。   Here, when the drive motor 38 of the drive mechanism 22 is driven, the drive force is transmitted to the pinion gear 40. Then, the drive mechanism 22 moves the image reading unit 24 in the apparatus depth direction (Y-axis direction in FIG. 3) along the convex portion 36 of the guide unit 20 to read the document placed on the document placement surface 28. Read information such as the image of the surface.

また、図４に示すように筐体１２の裏面には収容部４４が設けられている。収容部４４には、スタンド２６が収容されている。スタンド２６は、図４に示すように収容部４４に収容された状態と、図５に示すように収容部４４から引き出されて筐体１２の裏面１２ａに対して傾斜した状態とを切換可能に構成されている。そして、スタンド２６は、筐体１２を傾斜した姿勢で保持可能に構成されている。   Further, as shown in FIG. 4, a housing portion 44 is provided on the back surface of the housing 12. In the accommodating portion 44, the stand 26 is accommodated. The stand 26 can be switched between a state in which it is accommodated in the accommodating portion 44 as shown in FIG. 4 and a state in which it is pulled out from the accommodating portion 44 and inclined with respect to the back surface 12a of the housing 12 as shown in FIG. It is configured. The stand 26 is configured to be able to hold the housing 12 in an inclined posture.

尚、本実施例における画像読取装置１０は、図１及び図２に示すように設置面４６に対して筐体１２の裏面１２ａが接する水平姿勢、あるいは図５に示すように設置面４６に対して筐体１２が傾斜する傾斜姿勢で使用又は保管される。   The image reading apparatus 10 according to the present embodiment is in a horizontal posture where the rear surface 12a of the housing 12 is in contact with the installation surface 46 as shown in FIGS. 1 and 2, or with respect to the installation surface 46 as shown in FIG. The housing 12 is used or stored in an inclined posture.

■■■開閉体の回動機構について■■■■
図６及び図７を参照して、筐体１２に対して回動可能に取り付けられたカバー１４の回動機構について説明する。カバー１４において装置奥行き方向における装置背面側（図６における＋Ｙ軸方向側）の端部には、回動軸部４７、４７が設けられている。回動軸部４７は、装置幅方向（図２におけるＸ軸方向）においてカバー１４の両端部に設けられている。回動軸部４７には、回動軸４８、４８（図８参照）が設けられている。回動軸４８は、図８に示すように回動軸部４７の装置幅方向（図８におけるＸ軸方向）における両端部から装置幅方向へそれぞれ突出して形成されている。 ■■■ Rotating mechanism of the opening / closing body ■■■■
With reference to FIG.6 and FIG.7, the rotation mechanism of the cover 14 attached with respect to the housing | casing 12 so that rotation is possible is demonstrated. At the end of the cover 14 in the apparatus depth direction on the apparatus rear side (+ Y axis direction side in FIG. 6), rotating shaft parts 47 and 47 are provided. The rotation shaft portion 47 is provided at both ends of the cover 14 in the apparatus width direction (X-axis direction in FIG. 2). The rotation shaft portion 47 is provided with rotation shafts 48 and 48 (see FIG. 8). As shown in FIG. 8, the rotation shaft 48 is formed so as to protrude from both ends of the rotation shaft portion 47 in the device width direction (X-axis direction in FIG. 8) in the device width direction.

また、筐体１２において装置奥行き方向における装置背面側（図６における＋Ｙ軸方向側）の端部には、軸受け部５０、５０（図３、図６及び図７参照）が設けられている。軸受け部５０、５０は、筐体１２の装置背面側の端部において装置幅方向に間隔をおいて設けられている。軸受け部５０には、原稿載置面２８に対して交差する方向に延びる直線状の案内溝５２が形成されている。カバー１４の回動軸４８は案内溝５２内に受け入れられている。これにより、回動軸４８は、原稿載置面２８に対して交差する方向に変位可能となっている。尚、本実施例において案内溝５２は原稿載置面２８に対して直交する方向に延びている。   Also, bearings 50 and 50 (see FIGS. 3, 6, and 7) are provided at the end of the housing 12 on the apparatus rear side in the apparatus depth direction (+ Y axis direction side in FIG. 6). The bearing portions 50, 50 are provided at intervals in the apparatus width direction at the end of the housing 12 on the apparatus rear side. The bearing portion 50 is formed with a linear guide groove 52 extending in a direction intersecting with the document placement surface 28. The rotation shaft 48 of the cover 14 is received in the guide groove 52. Thereby, the rotation shaft 48 can be displaced in a direction intersecting with the document placement surface 28. In this embodiment, the guide groove 52 extends in a direction orthogonal to the document placement surface 28.

また、筐体１２には、装置奥行き方向（図６及び図７におけるＹ軸方向）において軸受け部５０よりも装置背面側（図６及び図７における＋Ｙ軸方向）の位置に回動規制部５４が設けられている。回動軸４８を案内溝５２内で図６における反時計回り方向に回動させると、カバー１４も前記反時計周り方向に回動し、原稿台１６を閉じた姿勢（図６におけるカバー１４の姿勢）から原稿台１６を開いた姿勢（図７におけるカバー１４の姿勢）へと切り換わる。   Further, the casing 12 has a rotation restricting portion 54 at a position closer to the device rear side (+ Y axis direction in FIGS. 6 and 7) than the bearing portion 50 in the apparatus depth direction (Y axis direction in FIGS. 6 and 7). Is provided. When the rotation shaft 48 is rotated counterclockwise in FIG. 6 within the guide groove 52, the cover 14 is also rotated counterclockwise and the document table 16 is closed (the cover 14 in FIG. 6 is closed). The posture is switched from the posture) to the posture in which the document table 16 is opened (the posture of the cover 14 in FIG. 7).

カバー１４が原稿台１６に対して開いた姿勢に切り換わると、カバー１４の回動軸部４７側の端部１４ａは、回動規制部５４と当接する。そして、カバー１４が原稿台１６に対して所定の角度以上に開いた状態となることを規制する。つまり、カバー１４の回動軸部４７側の端部１４ａと回動規制部５４とが当接することにより、回動軸４８の図７における反時計回り方向への回動が規制される。   When the cover 14 is switched to the open position with respect to the document table 16, the end 14 a of the cover 14 on the rotation shaft portion 47 side comes into contact with the rotation restricting portion 54. Then, the cover 14 is restricted from being opened at a predetermined angle or more with respect to the document table 16. That is, when the end portion 14a of the cover 14 on the rotation shaft portion 47 side and the rotation restricting portion 54 abut, the rotation of the rotation shaft 48 in the counterclockwise direction in FIG. 7 is restricted.

また、カバー１４を原稿台１６に対して回動させ、カバー１４を原稿台１６に対して開いた姿勢とすることにより、原稿載置面２８に原稿をセットすること、あるいは原稿を交換することができる。   Further, by rotating the cover 14 with respect to the document table 16 and opening the cover 14 with respect to the document table 16, the document is set on the document placement surface 28 or the document is exchanged. Can do.

また、図６に示すように本実施例において回動軸４８は案内溝５２内において原稿載置面２８と直交する方向（図６におけるＺ軸方向）に変位可能である。したがって、回動軸４８を案内溝５２内において実線で描かれた位置から案内溝５２の上端部（図６における一点鎖線で描かれた位置）に向かって変位させると、カバー１４も原稿台１６から装置高さ方向における上方（図６における＋Ｚ軸方向）へ向けて移動し、原稿台１６から離間する。また、回動軸４８は案内溝５２の前記上端部に位置する状態でも回動可能であることから、カバー１４は回動軸４８の原稿載置面２８と交差する方向への変位に伴ってカバー１４が原稿台１６から離間した状態においても筐体１２に対して回動可能である。   As shown in FIG. 6, in this embodiment, the rotation shaft 48 can be displaced in the guide groove 52 in a direction orthogonal to the document placement surface 28 (Z-axis direction in FIG. 6). Therefore, when the rotation shaft 48 is displaced from the position drawn by the solid line in the guide groove 52 toward the upper end portion of the guide groove 52 (position drawn by the alternate long and short dash line in FIG. 6), the cover 14 also has the document table 16. To the upper side in the apparatus height direction (+ Z axis direction in FIG. 6), and moves away from the document table 16. Further, since the rotation shaft 48 can be rotated even in a state where it is located at the upper end portion of the guide groove 52, the cover 14 is moved in accordance with the displacement of the rotation shaft 48 in the direction intersecting the document placement surface 28. Even when the cover 14 is separated from the document table 16, the cover 14 can be rotated with respect to the housing 12.

つまり、本実施例では、カバー１４の回動中心である回動軸４８を案内溝５２に沿って装置高さ方向に上下動することができる。したがって、原稿載置面２８に厚みのある原稿、例えば冊子やパスポート等を載置した場合、その厚み分に応じてカバー１４の回動中心である回動軸４８が案内溝５２内で原稿載置面２８に交差する方向へ変位する。その結果、カバー１４を前記厚みのある原稿が載置された原稿載置面２８に対して閉じるように回動させた際、カバー１４はこれら厚みのある原稿の被読取面と反対側を均一に押圧することができる   That is, in the present embodiment, the rotation shaft 48 that is the rotation center of the cover 14 can be moved up and down in the apparatus height direction along the guide groove 52. Therefore, when a thick original, such as a booklet or a passport, is placed on the original placement surface 28, the rotation shaft 48, which is the rotation center of the cover 14, is placed in the guide groove 52 according to the thickness. It is displaced in the direction intersecting the placement surface 28. As a result, when the cover 14 is rotated so as to be closed with respect to the document placing surface 28 on which the thick original is placed, the cover 14 is uniformly placed on the side opposite to the surface to be read of the thick original. Can be pressed into

■■■回動軸規制手段について■■■■
次いで、図８及び図９を参照して案内溝５２内における回動軸４８の変位を規制する回動軸規制手段６０について説明する。回動軸規制手段６０は、規制部材６２と、付勢部材６４と、「変位可能に設けられた部材すなわちカム機構を有する部材」としてのカム部材６６とを備えている。 ■■■ Rotation axis restricting means ■■■■
Next, the rotation shaft restricting means 60 for restricting the displacement of the rotation shaft 48 in the guide groove 52 will be described with reference to FIGS. The rotation shaft restricting means 60 includes a restricting member 62, an urging member 64, and a cam member 66 as a “member displaceable, that is, a member having a cam mechanism”.

規制部材６２は、回動軸４８と係合可能な係合部６２ａと、傾斜面６２ｂとを備えている。規制部材６２は、筐体１２内において図８及び図９に示すように装置幅方向（図８及び図９におけるＸ軸方向）に沿って変位可能に構成されている。   The restricting member 62 includes an engaging portion 62a that can engage with the rotation shaft 48, and an inclined surface 62b. The regulating member 62 is configured to be displaceable along the apparatus width direction (X-axis direction in FIGS. 8 and 9) in the housing 12 as shown in FIGS.

具体的には規制部材６２は、案内溝５２内における原稿載置面２８に対して交差する方向（図８及び図９におけるＺ軸方向）への回動軸４８の変位を許容する第１状態を形成する離間位置（図８における規制部材６２の位置）と、案内溝５２内における原稿載置面２８に対して交差する方向（図８及び図９におけるＺ軸方向）への回動軸４８の変位を規制する第２状態を形成する係合位置（図９における規制部材６２の位置）との間を変位可能に構成されている。そして、規制部材６２が係合位置に位置すると、係合部６２ａは回動軸４８と係合可能となる。   Specifically, the regulating member 62 allows the displacement of the rotation shaft 48 in the direction intersecting the document placement surface 28 in the guide groove 52 (Z-axis direction in FIGS. 8 and 9). 8 and a rotation shaft 48 in a direction intersecting the document placement surface 28 in the guide groove 52 (Z-axis direction in FIGS. 8 and 9). Between the engagement position (position of the regulating member 62 in FIG. 9) that forms the second state that regulates the displacement. When the restricting member 62 is located at the engaging position, the engaging portion 62a can be engaged with the rotating shaft 48.

また、付勢部材６４は、一端が規制部材６２に取り付けられ、他端が筐体１２に取り付けられている。そして、付勢部材６４は規制部材６２を離間位置（図８における規制部材６２の位置）から係合位置（図９における規制部材６２の位置）に向けて付勢している。尚、本実施例において、付勢部材６４はコイルばねとして構成されている。   The biasing member 64 has one end attached to the regulating member 62 and the other end attached to the housing 12. The urging member 64 urges the restricting member 62 from the separated position (position of the restricting member 62 in FIG. 8) toward the engagement position (position of the restricting member 62 in FIG. 9). In this embodiment, the urging member 64 is configured as a coil spring.

カム部材６６は、筐体１２内において規制部材６２の下方側（図８及び図９におえｋる）に配置されている。カム部材６６は、規制部材６２の傾斜面６２ｂと係合するカム面６６ａと、筐体１２の裏面１２ａから突出可能な突出部６６ｂとを備えている。   The cam member 66 is disposed on the lower side of the restricting member 62 (refer to FIGS. 8 and 9) in the housing 12. The cam member 66 includes a cam surface 66 a that engages with the inclined surface 62 b of the regulating member 62, and a protrusion 66 b that can protrude from the back surface 12 a of the housing 12.

本実施例において、カム部材６６は筐体１２の裏側、つまり裏面１２ａから突出する突出位置（図９におけるカム部材６６の位置）と、当該突出位置よりも筐体１２の内側に押し込まれる押し込み位置（図８におけるカム部材６６の位置）との間を変位可能に構成されている。   In the present embodiment, the cam member 66 is located on the back side of the housing 12, that is, the projecting position that projects from the back surface 12a (the position of the cam member 66 in FIG. 9), and the pushing position that is pushed into the housing 12 from the projecting position. It can be displaced between (the position of the cam member 66 in FIG. 8).

カム部材６６を図９に示す突出位置から図８に示す押し込み位置に押し込むと、カム部材６６のカム面６６ａが装置高さ方向における上方（図８及び図９における＋Ｚ軸方向）に変位する。これにより、規制部材６２の傾斜面６２ｂはカム面６６ａに対してスライド移動させられ、規制部材６２は付勢部材６４の付勢力に抗して係合位置（図９における規制部材６２の位置）つまり規制部材６２と回動軸部４７とが係合する位置から離間位置（図８における規制部材６２の位置）つまり規制部材６２と回動軸部４７とが係合状態を解消して離間する位置へ変位させられる。尚、図８では、筐体１２の裏面１２ａが設置面４６に接している状態を示している。この状態では、設置面４６によりカム部材６６が押し込み位置に押し込まれている。   When the cam member 66 is pushed from the protruding position shown in FIG. 9 to the pushing position shown in FIG. 8, the cam surface 66a of the cam member 66 is displaced upward in the apparatus height direction (+ Z axis direction in FIGS. 8 and 9). Accordingly, the inclined surface 62b of the restricting member 62 is slid relative to the cam surface 66a, and the restricting member 62 is engaged with the biasing force of the biasing member 64 (the position of the restricting member 62 in FIG. 9). That is, the position where the restricting member 62 and the rotating shaft portion 47 are engaged is separated from the position (the position of the restricting member 62 in FIG. 8), that is, the restricting member 62 and the rotating shaft portion 47 are disengaged and separated. Displaced to position. 8 shows a state in which the back surface 12a of the housing 12 is in contact with the installation surface 46. In this state, the cam member 66 is pushed into the pushing position by the installation surface 46.

これにより、回動軸規制手段６０は第１状態となり、案内溝５２内において回動軸４８の原稿載置面２８と交差する方向（図８及び図９におけるＺ軸方向）への変位が許容される。   As a result, the rotation shaft restricting means 60 is in the first state, and the displacement of the rotation shaft 48 in the direction intersecting with the document placement surface 28 in the guide groove 52 (Z-axis direction in FIGS. 8 and 9) is allowed. Is done.

次いで、例えば、筐体１２を設置面４６から持ち上げると、付勢部材６４の付勢力に抗してカム部材６６を押し込み位置（図８におけるカム部材６６の位置）に押し込んでいた力が消失する。これにより、規制部材６２は付勢部材６４の付勢力により、規制部材６２は離間位置（図８における規制部材６２の位置）から係合位置（図９における規制部材６２の位置）へ変位させられる。   Next, for example, when the housing 12 is lifted from the installation surface 46, the force that has pushed the cam member 66 into the pushing position (the position of the cam member 66 in FIG. 8) against the biasing force of the biasing member 64 disappears. . Thereby, the regulating member 62 is displaced from the separated position (position of the regulating member 62 in FIG. 8) to the engaged position (position of the regulating member 62 in FIG. 9) by the urging force of the urging member 64. .

そして、カム部材６６のカム面６６ａは、規制部材６２の離間位置（図８における規制部材６２の位置）から係合位置（図９における規制部材６２の位置）への変位に伴い規制部材６２の傾斜面６２ｂに対してスライド移動させられる。その結果、カム部材６６は、図８に示す押し込み位置（図８におけるカム部材６６の位置）に押しこまれた状態から図９に示す筐体１２の裏面１２ａから突出する突出位置（図９におけるカム部材６６の位置）に変位させられる。   The cam surface 66a of the cam member 66 is moved by the displacement of the restriction member 62 from the separation position of the restriction member 62 (position of the restriction member 62 in FIG. 8) to the engagement position (position of the restriction member 62 in FIG. 9). It is slid with respect to the inclined surface 62b. As a result, the cam member 66 protrudes from the back surface 12a of the housing 12 shown in FIG. 9 from the pushed-in position (the position of the cam member 66 in FIG. 8) shown in FIG. The position of the cam member 66 is displaced.

また、規制部材６２の離間位置（図８における規制部材６２の位置）から係合位置（図９における規制部材６２の位置）への変位に伴い、案内溝５２内に規制部材６２の係合部６２ａが突出することとなるので、回動軸規制手段６０は第２状態となり、回動軸４８の原稿載置面２８と交差する方向（図８及び図９におけるＺ軸方向）への変位が規制される。   Further, the engaging portion of the restricting member 62 is inserted into the guide groove 52 in accordance with the displacement from the separation position of the restricting member 62 (position of the restricting member 62 in FIG. 8) to the engaging position (position of the restricting member 62 in FIG. 9). Since 62a protrudes, the rotation shaft restricting means 60 is in the second state, and the displacement of the rotation shaft 48 in the direction intersecting with the document placement surface 28 (Z-axis direction in FIGS. 8 and 9). Be regulated.

つまり、本実施例では、回動軸規制手段６０は、設置面４６に対して筐体１２の裏面１２ａが接した場合に第１状態をとり、設置面４６に対して筐体１２の裏面１２ａが離れた場合に第２状態をとるので、設置面４６に対して筐体１２の裏面１２ａが離れた場合に回動軸４８が不用意に動くことを防止できる。その結果、画像読取装置１０の姿勢に影響されず、原稿台１６に載置された原稿を、カバー１４によって適切に押さえることができ、或いは、画像読取装置１０を持ち運ぶ際に、カバー１４が意図せず外れてしまうことを防止できる。   That is, in this embodiment, the rotation axis restricting means 60 takes the first state when the rear surface 12 a of the housing 12 is in contact with the installation surface 46, and the rear surface 12 a of the housing 12 with respect to the installation surface 46. Since the second state is taken when the separation is made, the rotation shaft 48 can be prevented from inadvertently moving when the rear surface 12a of the housing 12 is separated from the installation surface 46. As a result, the document placed on the document table 16 can be appropriately pressed by the cover 14 without being affected by the posture of the image reading device 10, or the cover 14 is intended when carrying the image reading device 10. Can be prevented from coming off.

また、図１０に示すように筐体１２をスタンド２６により設置面４６に対して傾斜した姿勢に保持した場合において、筐体１２の裏面１２ａは設置面４６に対して接地されていない。したがって、カム部材６６は設置面４６により筐体１２内に押し込まれていない。その結果、カム部材６６は突出位置（図９におけるカム部材６６の位置）にあるので、規制部材６２は係合位置（図９における規制部材６２の位置）に位置している。つまり、回動軸４８は回動軸規制手段６０により原稿載置面２８と交差する方向への変位を規制されている状態にある。   In addition, as shown in FIG. 10, when the housing 12 is held in a posture inclined with respect to the installation surface 46 by the stand 26, the back surface 12 a of the housing 12 is not grounded with respect to the installation surface 46. Therefore, the cam member 66 is not pushed into the housing 12 by the installation surface 46. As a result, since the cam member 66 is in the protruding position (the position of the cam member 66 in FIG. 9), the restriction member 62 is located in the engagement position (the position of the restriction member 62 in FIG. 9). That is, the rotation shaft 48 is in a state where displacement in the direction intersecting the document placement surface 28 is restricted by the rotation shaft restriction means 60.

その結果、筐体１２が傾斜姿勢にある場合、回動軸４８は回動軸規制手段６０により変位を規制されているので、回動軸４８が原稿載置面２８と交差する方向において＋Ｚ軸方向側に不用意に動き、カバー１４が原稿台１６との間に隙間を形成してしまうことを防止できる。これにより、原稿載置面２８に載置された原稿が原稿載置面２８からずれてしまうことや原稿の一部が原稿載置面２８から浮き上がることにより原稿の画像読み取りの精度が低下することを抑制することができる。   As a result, when the housing 12 is in the inclined posture, the rotation shaft 48 is restricted from being displaced by the rotation shaft restricting means 60, and therefore the + Z axis in the direction in which the rotation shaft 48 intersects the document placement surface 28. It is possible to prevent the cover 14 from inadvertently moving in the direction and forming a gap with the document table 16. As a result, the document placed on the document placement surface 28 is displaced from the document placement surface 28, and a part of the document is lifted from the document placement surface 28, thereby reducing the accuracy of document image reading. Can be suppressed.

すなわち、回動軸規制手段６０は、筐体１２の設置面４６に対する筐体１２の姿勢に応じて第1状態と第２状態とを切り換えるので、画像読取装置１０の姿勢に影響されず、原稿台１６に載置された原稿を、カバー１４によって適切に押さえることができる。   That is, the rotation axis restricting means 60 switches between the first state and the second state according to the posture of the housing 12 with respect to the installation surface 46 of the housing 12, so that the document is not affected by the posture of the image reading device 10. The document placed on the table 16 can be appropriately pressed by the cover 14.

さらに、図１０に示すように筐体１２が傾斜姿勢に保持された状態において、カバー１４は、設置面４６に対する鉛直方向と交差する方向である横方向に開閉するので、カバー１４の開いた状態を容易に保持することができ、原稿台１６への原稿載置の際の作業性が向上する。   Furthermore, as shown in FIG. 10, in a state where the housing 12 is held in an inclined posture, the cover 14 opens and closes in the lateral direction that intersects the vertical direction with respect to the installation surface 46, so that the cover 14 is open. Can be easily held, and the workability when placing the document on the document table 16 is improved.

また、本実施例では規制部材６２、付勢部材６４、カム部材６６のこれらによって、筐体１２の設置面４６に対する姿勢に応じて回動軸規制手段６０が第1状態と第２状態とを切り換える。即ち、特段のユーザー操作を必要とせず、回動軸規制手段６０が、筐体１２の姿勢に応じた適切な状態に切り換わり、これによりユーザーの操作性が向上する。   In this embodiment, the restricting member 62, the urging member 64, and the cam member 66 allow the rotation shaft restricting means 60 to change between the first state and the second state according to the posture of the housing 12 with respect to the installation surface 46. Switch. That is, no special user operation is required, and the rotation axis restricting means 60 is switched to an appropriate state according to the posture of the housing 12, thereby improving user operability.

上記説明をまとめると本実施例において、画像読取装置１０は原稿台１６を開閉するカバー１４の回動軸４８の変位を許容する第1状態と、回動軸４８の変位を規制する第２状態と、を切り換え可能な回動軸規制手段６０を備えているので、回動軸規制手段６０を第１状態とすることで、原稿の厚みに応じて原稿台１６に載置された原稿を、カバー１４によって適切に押さえることができる。また、回動軸規制手段６０を第２状態とすることで、画像読取装置１０の姿勢に影響されず、適切に原稿を押さえることができる。   In summary, in the present embodiment, the image reading apparatus 10 has a first state in which the displacement of the rotation shaft 48 of the cover 14 that opens and closes the document table 16 and a second state in which the displacement of the rotation shaft 48 is restricted. And the pivot axis restricting means 60 that can be switched between. And the pivot axis restricting means 60 in the first state, the document placed on the document table 16 according to the thickness of the document, The cover 14 can be appropriately pressed down. In addition, by setting the rotation axis restricting means 60 to the second state, it is possible to appropriately hold down the document without being influenced by the posture of the image reading apparatus 10.

＜＜＜回動軸規制手段の変更例＞＞＞
図１１（Ａ）及び図１１（Ｂ）を参照して回動軸規制手段の変更例について説明する。回動軸規制手段６８は、規制部材７０と、操作部７２とを備えている。規制部材７０は回動軸４８と係合可能な係合部７０ａを備えている。一例として、操作部７２は規制部材７０に取り付けられるとともに、筐体１２に対して装置幅方向（Ｘ軸方向）にスライド移動可能に設けられている。つまり、操作部７２を装置幅方向（Ｘ軸方向）にスライド移動させると、規制部材７０も装置幅方向（Ｘ軸方向）に変位する。尚、図１１（Ａ）及び図１１（Ｂ）において筐体１２の図示は省略している。 <<< Example of change of rotation axis regulating means >>>
With reference to FIG. 11 (A) and FIG. 11 (B), the example of a change of a rotating shaft control means is demonstrated. The rotating shaft restricting means 68 includes a restricting member 70 and an operation unit 72. The restricting member 70 includes an engaging portion 70 a that can engage with the rotating shaft 48. As an example, the operation unit 72 is attached to the restriction member 70 and is slidable in the apparatus width direction (X-axis direction) with respect to the housing 12. That is, when the operation unit 72 is slid in the apparatus width direction (X axis direction), the regulating member 70 is also displaced in the apparatus width direction (X axis direction). In addition, illustration of the housing | casing 12 is abbreviate | omitted in FIG. 11 (A) and FIG. 11 (B).

図１１（Ａ）において規制部材７０は離間位置にあるので、係合部７０ａと回動軸４８とは係合しない。つまり、回動軸規制手段６８は第１状態にあるので、回動軸４８の原稿載置面２８と交差する方向（図１１（Ａ）及び図１１（Ｂ）におけるＺ軸方向）への変位が許容される。   In FIG. 11A, since the regulating member 70 is in the separated position, the engaging portion 70a and the rotating shaft 48 are not engaged. That is, since the rotation shaft restricting means 68 is in the first state, the displacement of the rotation shaft 48 in the direction intersecting with the document placement surface 28 (the Z-axis direction in FIGS. 11A and 11B). Is acceptable.

そして、ユーザーが操作部７２を操作して、操作部７２を装置幅方向（Ｘ軸方向）にスライド移動させると、規制部材７０も装置幅方向（Ｘ軸方向）において離間位置（図１１（Ａ）参照）から係合位置（図１１（Ｂ）参照）へ移動する。これにより、係合部７０ａと回動軸４８とが係合する。つまり、回動軸規制手段６８は第１状態から第２状態へと切り換わるので、回動軸４８の原稿載置面２８と交差する方向（図１１（Ａ）及び図１１（Ｂ）におけるＺ軸方向）への変位が規制される。   When the user operates the operation unit 72 and slides the operation unit 72 in the apparatus width direction (X-axis direction), the regulating member 70 is also separated from the position in the apparatus width direction (X-axis direction) (FIG. 11A). )) To the engagement position (see FIG. 11B). Thereby, the engaging part 70a and the rotating shaft 48 are engaged. That is, since the rotation axis restricting means 68 is switched from the first state to the second state, the direction intersecting the document placement surface 28 of the rotation axis 48 (Z in FIGS. 11A and 11B). Axial displacement) is restricted.

上記説明をまとめると本実施例における画像読取装置１０は、原稿を載置する原稿台１６および当該原稿台１６に載置された原稿を読み取る画像読取部２４が設けられた筐体１２と、回動軸４８を介して筐体１２に回動可能に設けられ、回動することにより原稿台１６を開閉するカバー１４と、原稿台１６の原稿載置面２８に対して交差する方向への回動軸４８の変位を許容する第1状態と、回動軸４８の変位を規制する第２状態と、を切り換え可能な回動軸規制手段６０、６８とを備えている。   To summarize the above description, the image reading apparatus 10 in this embodiment includes a document table 16 on which a document is placed and a housing 12 provided with an image reading unit 24 that reads the document placed on the document table 16. The cover 12 is rotatably provided on the housing 12 via the moving shaft 48, and rotates in a direction intersecting the document placement surface 28 of the document table 16 and the cover 14 that opens and closes the document table 16 by rotating. Rotating shaft restricting means 60 and 68 capable of switching between a first state allowing displacement of the moving shaft 48 and a second state restricting displacement of the rotating shaft 48 are provided.

回動軸規制手段６０は、筐体１２の設置面４６に対する筐体１２の姿勢に応じて第1状態と第２状態とを切り換える。回動軸規制手段６０は、設置面４６に対して筐体１２の裏面１２ａが接した場合に第１状態をとり、設置面４６に対して筐体１２の裏面１２ａが離れた場合に第２状態をとる。   The rotation axis restricting means 60 switches between the first state and the second state according to the attitude of the housing 12 with respect to the installation surface 46 of the housing 12. The rotation axis restricting means 60 takes the first state when the back surface 12a of the housing 12 is in contact with the installation surface 46, and the second state when the back surface 12a of the housing 12 is separated from the installation surface 46. Take a state.

回動軸４８はカバー１４に設けられた回動軸部４７に設けられ、回動軸規制手段６０は、回動軸部４７から離間して第１状態を形成する離間位置と、回動軸部４７と係合して第２状態を形成する係合位置と、の間を変位可能に設けられた規制部材６２と、当該規制部材６２を係合位置に向けて付勢する付勢部材６４と、筐体１２の裏面１２ａから突出し、規制部材６２の係合位置への変位を許容する突出位置と、当該突出位置よりも筐体１２の内側に押し込まれ、規制部材６２の係合位置への変位を規制する押し込み位置と、の間を変位可能に設けられた部材とを備えている。前記変位可能に設けられた部材はカム機構を有するカム部材６６である。   The rotation shaft 48 is provided in the rotation shaft portion 47 provided in the cover 14, and the rotation shaft restricting means 60 is separated from the rotation shaft portion 47 to form a first state, and the rotation shaft. A restricting member 62 that is displaceable between an engaging position that engages with the portion 47 to form the second state, and a biasing member 64 that biases the restricting member 62 toward the engaging position. And a protruding position that protrudes from the back surface 12a of the housing 12 and allows the displacement of the restricting member 62 to the engaged position, and is pushed into the inside of the housing 12 from the protruded position to the engaged position of the restricting member 62. And a push-in position that regulates the displacement, and a member that is displaceable between them. The displaceable member is a cam member 66 having a cam mechanism.

回動軸４８はカバー１４に設けられた回動軸部４７に設けられ、回動軸規制手段６８は、回動軸部４７から離間して第１状態を形成する離間位置と、回動軸部４７と係合して第２状態を形成する係合位置と、の間を変位可能に設けられた規制部材７０と、当該規制部材７０を変位させる為の操作部７２とを備えている。   The rotation shaft 48 is provided in a rotation shaft portion 47 provided in the cover 14, and the rotation shaft restricting means 68 is separated from the rotation shaft portion 47 to form a first position, and the rotation shaft. There are provided a regulating member 70 that is displaceable between an engagement position that engages with the portion 47 to form the second state, and an operation portion 72 for displacing the regulating member 70.

また、画像読取装置１０において筐体１２は、回動軸４８を原稿載置面２８に対して交差する方向に案内する直線状の案内溝５２を備える軸受け部５０を有している。また、画像読取装置１０は筐体１２の設置面４６に対して筐体１２を傾斜姿勢に保持可能なスタンド２６を備えている。筐体１２がスタンド２６により傾斜姿勢に保持された状態においてカバー１４は、設置面４６に対する鉛直方向と交差する方向である横方向に開閉する。   Further, in the image reading apparatus 10, the housing 12 has a bearing portion 50 including a linear guide groove 52 that guides the rotation shaft 48 in a direction intersecting the document placement surface 28. Further, the image reading apparatus 10 includes a stand 26 that can hold the housing 12 in an inclined posture with respect to the installation surface 46 of the housing 12. In a state where the housing 12 is held in an inclined posture by the stand 26, the cover 14 opens and closes in a lateral direction that is a direction intersecting the vertical direction with respect to the installation surface 46.

尚、本発明は上記実施例に限定されることなく、特許請求の範囲に記載した発明の範囲内で、種々の変形が可能であり、それらも本発明の範囲内に含まれるものであることは言うまでもない。   The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

１０ 画像読取装置、１２ 筐体、１２ａ 裏面、１４ カバー、１４ａ 端部、
１６ 原稿台、１８、７２ 操作部、２０ 案内部、２２ 駆動機構、２４ 画像読取部、
２６ スタンド、２８ 原稿載置面、３０ａ 前面フレーム、３０ｂ 背面フレーム、
３０ｃ 側面フレーム、３０ｄ 側面フレーム、３２ 原稿押さえ部材、３４ ラック、
３６ 凸部、３８ 駆動モーター、４０ ピニオンギア、４２ 凹部、４４ 収容部、
４６ 設置面、４７ 回動軸部、４８ 回動軸、５０ 軸受け部、５２ 案内溝、
５４ 回動規制部、６０、６８ 回動軸規制手段、６２、７０ 規制部材、
６２ａ、７０ａ 係合部、６２ｂ 傾斜面、６４ 付勢部材、６６ カム部材、
６６ａ カム面、６６ｂ 突出部 DESCRIPTION OF SYMBOLS 10 Image reader, 12 Case, 12a Back surface, 14 Cover, 14a End part,
16 Document table, 18, 72 Operation unit, 20 Guide unit, 22 Drive mechanism, 24 Image reading unit,
26 Stand, 28 Document placement surface, 30a Front frame, 30b Rear frame,
30c side frame, 30d side frame, 32 document holding member, 34 rack,
36 convex part, 38 drive motor, 40 pinion gear, 42 concave part, 44 accommodating part,
46 installation surface, 47 rotation shaft, 48 rotation shaft, 50 bearing, 52 guide groove,
54 rotation restricting portions, 60, 68 rotating shaft restricting means, 62, 70 restricting members,
62a, 70a engaging portion, 62b inclined surface, 64 biasing member, 66 cam member,
66a Cam surface, 66b Projection

Claims (8)

原稿を載置する原稿台および当該原稿台に載置された原稿を読み取る読み取り手段が設けられた筐体と、
回動軸を介して前記筐体に回動可能に設けられ、回動することにより前記原稿台を開閉する開閉体と、
前記原稿台の原稿載置面に対して交差する方向への前記回動軸の変位を許容する第1状態と、前記変位を規制する第２状態と、を切り換え可能な回動軸規制手段と、
を備えた画像読取装置。 A document table on which a document is placed, and a housing provided with reading means for reading the document placed on the document table;
An opening / closing body that is rotatably provided to the housing via a rotation shaft, and that opens and closes the document table by rotating;
Rotation axis restricting means capable of switching between a first state in which the displacement of the rotation axis in a direction intersecting the document placement surface of the document table and a second state in which the displacement is restricted are switchable. ,
An image reading apparatus comprising: 請求項１に記載の画像読取装置において、前記回動軸規制手段は、前記筐体の設置面に対する前記筐体の姿勢に応じて前記第1状態と前記第２状態とを切り換える、
ことを特徴とする画像読取装置。 2. The image reading apparatus according to claim 1, wherein the rotation axis restricting unit switches between the first state and the second state in accordance with an attitude of the casing with respect to an installation surface of the casing.
An image reading apparatus. 請求項２に記載の画像読取装置において、前記回動軸規制手段は、前記設置面に対して前記筐体の裏側が接した場合に前記第１状態をとり、前記設置面に対して前記筐体の裏側が離れた場合に前記第２状態をとる、
ことを特徴とする画像読取装置。 3. The image reading apparatus according to claim 2, wherein the rotation axis restricting unit takes the first state when the back side of the housing is in contact with the installation surface, and the housing is in contact with the installation surface. Taking the second state when the back side of the body leaves,
An image reading apparatus. 請求項３に記載の画像読取装置において、前記回動軸は前記開閉体に設けられた回動軸部に設けられ、前記回動軸規制手段は、前記回動軸部から離間して前記第１状態を形成する離間位置と、前記回動軸部と係合して前記第２状態を形成する係合位置と、の間を変位可能に設けられた規制部材と、
前記規制部材を前記係合位置に向けて付勢する付勢部材と、
前記筐体の裏側から突出し、前記規制部材の前記係合位置への変位を許容する突出位置と、当該突出位置よりも前記筐体の内側に押し込まれ、前記規制部材の前記係合位置への変位を規制する押し込み位置と、の間を変位可能に設けられた部材と、を備える、
ことを特徴とする画像読取装置。 4. The image reading apparatus according to claim 3, wherein the rotation shaft is provided in a rotation shaft portion provided in the opening / closing body, and the rotation shaft restricting means is spaced apart from the rotation shaft portion. A regulating member provided so as to be displaceable between a separation position that forms one state and an engagement position that engages with the rotation shaft portion and forms the second state;
A biasing member that biases the restricting member toward the engagement position;
A protruding position that protrudes from the back side of the casing and allows the displacement of the restricting member to the engaging position, and is pushed into the inside of the casing from the protruding position, and the restricting member moves to the engaging position. A push-in position that regulates displacement, and a member that is displaceable between,
An image reading apparatus. 請求項４に記載の画像読取装置において、前記変位可能に設けられた部材はカム機構を有する部材である、
ことを特徴とする画像読取装置。 The image reading apparatus according to claim 4, wherein the displaceable member is a member having a cam mechanism.
An image reading apparatus. 請求項３に記載の画像読取装置において、前記回動軸は前記開閉体に設けられた回動軸部に設けられ、前記回動軸規制手段は、前記回動軸部から離間して前記第１状態を形成する離間位置と、前記回動軸部と係合して前記第２状態を形成する係合位置と、の間を変位可能に設けられた規制部材と、
前記規制部材を変位させる為の操作部と、を備える、
ことを特徴とする画像読取装置。 4. The image reading apparatus according to claim 3, wherein the rotation shaft is provided in a rotation shaft portion provided in the opening / closing body, and the rotation shaft restricting means is spaced apart from the rotation shaft portion. A regulating member provided so as to be displaceable between a separation position that forms one state and an engagement position that engages with the rotation shaft portion and forms the second state;
An operation unit for displacing the regulating member,
An image reading apparatus. 請求項１から請求項６のいずれか一項に記載の画像読取装置において、前記筐体は、前記回動軸を前記原稿載置面に対して交差する方向に案内する直線状の軸受け部を有する、
ことを特徴とする画像読取装置。 7. The image reading apparatus according to claim 1, wherein the housing includes a linear bearing portion that guides the rotation shaft in a direction intersecting the document placement surface. Have
An image reading apparatus. 請求項１から請求項７のいずれか一項に記載の画像読取装置において、前記筐体の設置面に対して前記筐体を傾斜姿勢に保持可能なスタンドを備え、
前記筐体が前記傾斜姿勢に保持された状態において、前記開閉体は、鉛直方向と交差する方向である横方向に開閉する、
ことを特徴とする画像読取装置。 The image reading apparatus according to any one of claims 1 to 7, further comprising a stand that can hold the casing in an inclined posture with respect to an installation surface of the casing.
In the state where the casing is held in the inclined posture, the opening and closing body opens and closes in a lateral direction that intersects the vertical direction.
An image reading apparatus.
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