JP2010120733A - Sheet carrying device and picture reading device - Google Patents

Sheet carrying device and picture reading device Download PDF

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JP2010120733A
JP2010120733A JP2008295436A JP2008295436A JP2010120733A JP 2010120733 A JP2010120733 A JP 2010120733A JP 2008295436 A JP2008295436 A JP 2008295436A JP 2008295436 A JP2008295436 A JP 2008295436A JP 2010120733 A JP2010120733 A JP 2010120733A
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unit
sheet conveying
conveying apparatus
upper unit
sheet
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JP5216548B2 (en
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Noriyuki Arai
紀行 新井
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Canon Electronics Inc
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Canon Electronics Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet carrying device that prevents a sheet from slipping down from a placing part, when an upper unit is rotatingly operated in the opening direction and a tilted carrying passage is opened, while the installation area is reduced. <P>SOLUTION: The sheet carrying device includes: a lower unit 13; an upper unit 12, supported by the lower unit 13 rotatably in the open/close direction, and forming a carrying passage 23, with the lower unit 13 in a closed state, for obliquely carrying a sheet from higher position to lower position; a placing part 2, disposed at the upstream end of the carrying passage 23, and on which a plurality of the sheets to be forwarded to the carrying passage 23 are placed; and restraining means for restraining the movement of the sheet placed on the placing part 2 at a border part between the placing part 2 and the carrying passage 23 or a downstream side position of the border part, by projecting a projecting part 18, capable of projecting into the carrying passage 23, into the carrying passage 23 in conjunction with the rotating action of the upper unit 12 in the opening direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、例えば、スキャナ等の画像読取装置、或いはプリンタやファクシミリ、複写機等の画像形成装置等に搭載されるシート搬送装置、及び該シート搬送装置を備える画像読取装置に関する。   The present invention relates to, for example, an image reading apparatus such as a scanner, or a sheet conveying apparatus mounted on an image forming apparatus such as a printer, a facsimile, or a copying machine, and an image reading apparatus including the sheet conveying apparatus.

従来のこの種のシート搬送装置として、低コスト化や小型化の要請から、下側ユニットと上側ユニットとの間に傾斜した搬送路を形成し、水平設置面に対して高い位置から低い位置に向けてシートを斜めに搬送するものがある。   As a conventional sheet conveying device of this type, an inclined conveying path is formed between the lower unit and the upper unit in order to reduce cost and size, so that the horizontal installation surface is changed from a high position to a low position. There are some which convey the sheet at an angle.

搬送路の上流端には、複数枚のシートが載置される載置部が配置され、該載置部に載置されたシートは、ローラ対等の分離給送手段によって一枚ずつ分離されて搬送路に送り出される。また、上側ユニットは、下側ユニットに対して回動可能に支持されており、シート詰まりなどが発生した場合は、上側ユニットを開方向に回動操作して搬送路を開放し、搬送路に詰まったシートを取り除くようにしている。   A placement unit on which a plurality of sheets are placed is disposed at the upstream end of the conveyance path, and the sheets placed on the placement unit are separated one by one by a separation feeding unit such as a roller pair. It is sent out to the conveyance path. The upper unit is supported so as to be rotatable with respect to the lower unit. When a sheet jam occurs, the upper unit is rotated in the opening direction to open the conveyance path, and I try to remove the jammed sheet.

また、更なる装置の小型化を実現するために、搬送路を垂直に近い角度で傾斜させ、装置の設置面積を極力小さくしたシート搬送装置も提案されている（特許文献１）。
特開２００３−８７４９９号公報 In order to realize further downsizing of the apparatus, a sheet conveying apparatus has also been proposed in which the conveying path is inclined at an angle close to vertical and the installation area of the apparatus is minimized (Patent Document 1).
JP 2003-87499 A

上記従来のシート搬送装置では、搬送路が傾斜しているため、シート詰まりなどの発生時に上側ユニットを開方向に回動操作して搬送路を開放した際に、載置部に載置されたシートが滑落する場合がある。この場合、ユーザは、載置部から滑落したシートを整頓して再度載置部にセットし直さなければならなくなる。そして、この課題は、上記特許文献１のように、装置の設置面積を極力小さくするために、搬送路の傾斜角度を垂直に近づけるほど顕著になる。   In the above conventional sheet conveying apparatus, since the conveying path is inclined, when the conveying unit is opened by rotating the upper unit in the opening direction when a sheet jam or the like occurs, the sheet is placed on the placing unit. The seat may slide down. In this case, the user has to arrange the sheets slid down from the placement unit and set them again on the placement unit. And this subject becomes so remarkable that the inclination-angle of a conveyance path is made close to perpendicular | vertical in order to make the installation area of an apparatus small as much as the said patent document 1. As shown in FIG.

そこで、本発明は、上側ユニットを開方向に回動操作して傾斜した搬送路を開放した際に、載置部からシートが滑落するのを防止することができるシート搬送装置及び画像読取装置を提供することを目的とする。   Therefore, the present invention provides a sheet conveying apparatus and an image reading apparatus that can prevent a sheet from sliding off from a placement portion when the inclined conveyance path is opened by rotating the upper unit in the opening direction. The purpose is to provide.

上記目的を達成するために、本発明のシート搬送装置は、下側ユニットと、該下側ユニットに対して開閉する方向に回動可能に支持され、閉状態で前記下側ユニットとの間に、水平設置面に対して高い位置から低い位置に向けてシートを斜めに搬送する搬送路を形成する上側ユニットとを有するシート搬送装置であって、前記搬送路の上流端に配置され、該搬送路に送り出される複数枚のシートが載置される載置部と、該載置部と前記搬送路との境界部又は該境界部の下流側の位置で、該搬送路に対して突出が可能な突出部を、前記上側ユニットの開方向への回動動作に連動して前記搬送路に突出させ、前記載置部に載置されたシートの動きを規制する規制手段と、を備えることを特徴とする。   In order to achieve the above object, a sheet conveying apparatus of the present invention is supported so as to be rotatable in a direction to open and close with respect to a lower unit, and between the lower unit in a closed state. A sheet conveying apparatus having an upper unit that forms a conveyance path for conveying the sheet obliquely from a high position to a low position with respect to a horizontal installation surface, the sheet conveyance apparatus being disposed at an upstream end of the conveyance path, Can be projected to the conveyance path at a placement part on which a plurality of sheets to be sent to the path are placed and a boundary part between the placement part and the conveyance path or a position downstream of the boundary part And a restricting means for restricting the movement of the sheet placed on the placing portion, by projecting the projecting portion into the conveying path in conjunction with the pivoting operation of the upper unit in the opening direction. Features.

本発明の画像読取装置は、シート搬送装置によって搬送路を搬送される原稿の画像を読み取る画像読取装置であって、前記シート搬送装置として、請求項１〜７のいずれか一項に記載のシート搬送装置を用いることを特徴とする。   An image reading apparatus according to the present invention is an image reading apparatus that reads an image of a document that is conveyed along a conveying path by a sheet conveying apparatus, and the sheet conveying apparatus includes the sheet according to claim 1. A transport device is used.

本発明によれば、設置面積を小さくしつつ、上側ユニットを開方向に回動操作して傾斜した搬送路を開放した際に、載置部からシートが滑落するのを防止することができる。   According to the present invention, it is possible to prevent the sheet from sliding off from the placing portion when the inclined conveying path is opened by rotating the upper unit in the opening direction while reducing the installation area.

以下、本発明の実施形態を図面を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（第１の実施形態）
図１は、本発明の第１の実施形態であるシート搬送装置を備える画像読取装置を説明するための概略断面図である。 (First embodiment)
FIG. 1 is a schematic cross-sectional view for explaining an image reading apparatus including a sheet conveying apparatus according to a first embodiment of the present invention.

図１に示す画像読取装置は、下側ユニット１３と、下側ユニット１３に対して開閉する方向に回動可能に支持され、閉状態で下側ユニット１３との間に原稿（シート）１の搬送路２３を形成する上側ユニット１２と、を備える。   The image reading apparatus shown in FIG. 1 is supported so as to be rotatable in a direction in which the lower unit 13 and the lower unit 13 are opened and closed, and a document (sheet) 1 is placed between the lower unit 13 and the lower unit 13 in the closed state. And an upper unit 12 that forms a conveyance path 23.

搬送路２３は、水平設置面に対して原稿１を高い位置（上流側）から低い位置（下流側）に向けて斜めに搬送するために傾斜して配置されている。なお、本実施形態では、上側ユニット１２は、下側ユニット１３の搬送路２３の下流端の近傍位置でヒンジ１１を介して開閉する方向に回動可能に支持されている。   The conveyance path 23 is inclined to convey the document 1 obliquely from a high position (upstream side) to a low position (downstream side) with respect to the horizontal installation surface. In the present embodiment, the upper unit 12 is supported so as to be rotatable in the direction of opening and closing via the hinge 11 at a position near the downstream end of the transport path 23 of the lower unit 13.

下側ユニット１３及び上側ユニット１２には、それぞれ搬送路２３を搬送される原稿１の下面及び上面の画像を読み取る画像読取部８及び画像読取部７が配置されている。搬送路２３の画像読取部７，８よりも上流の位置には、搬送ローラ対６が配置され、画像読取部７，８よりも下流の位置には、排紙ローラ対９が配置されている。また、搬送路２３の上流端には、複数枚の原稿１を載置する載置部２が設けられている。   The lower unit 13 and the upper unit 12 are provided with an image reading unit 8 and an image reading unit 7 for reading images on the lower surface and the upper surface of the document 1 conveyed through the conveyance path 23, respectively. A transport roller pair 6 is disposed at a position upstream of the image reading units 7 and 8 in the transport path 23, and a paper discharge roller pair 9 is disposed at a position downstream of the image reading units 7 and 8. . A placement unit 2 for placing a plurality of documents 1 is provided at the upstream end of the conveyance path 23.

載置部２に載置された原稿１は、搬送路２３を挟むように互いに対向配置された給送ローラ３及び分離ローラ４によって１枚ずつに分離された状態で給送口５から搬送路２３に給送される。なお、本実施形態では、搬送路２３の下側に給送ローラ３を配置し、搬送路２３の上側に分離ローラ４を配置して、載置部２に積載された原稿束の最下面の原稿１から順次搬送路２３に分離給送する。   The document 1 placed on the placement unit 2 is separated from the feeding port 5 in a state where the document 1 is separated one by one by a feeding roller 3 and a separation roller 4 that are arranged to face each other so as to sandwich the feeding path 23. 23. In the present embodiment, the feeding roller 3 is disposed below the conveyance path 23, and the separation roller 4 is disposed above the conveyance path 23, so that the lowermost surface of the bundle of documents stacked on the placement unit 2 is disposed. The original 1 is sequentially separated and fed to the conveyance path 23.

搬送路２３に分離給送された原稿１は、搬送ローラ対６によって画像読取部７，８に搬送されて両面の画像が読み取られ、その後、排紙ローラ対９によって下流側に搬送されて、排紙トレイ１０に排出される。   The original 1 separated and fed to the conveyance path 23 is conveyed to the image reading units 7 and 8 by the conveyance roller pair 6 to read images on both sides, and thereafter conveyed to the downstream side by the discharge roller pair 9. The paper is discharged to the paper discharge tray 10.

ここで、本実施形態では、給送ローラ３の駆動軸に回動部材３０が設けられている。回動部材３０は、駆動軸に対して回動可能とされており、その外周部には、ギヤ歯３０ａが形成されている。なお、回動部材３０は、分離ローラ４の駆動軸に設けてもよく、また、給送ローラ３又は分離ローラ４の駆動軸の延長軸線上又は軸線の近傍の位置に設けてもよい。   Here, in this embodiment, the rotation member 30 is provided on the drive shaft of the feed roller 3. The rotating member 30 is rotatable with respect to the drive shaft, and gear teeth 30a are formed on the outer peripheral portion thereof. The rotating member 30 may be provided on the drive shaft of the separation roller 4, or may be provided on an extension axis of the drive shaft of the feeding roller 3 or the separation roller 4 or in a position near the axis.

回転部材３０に設けた突出部１８は、上側ユニット１２の閉状態（図１）では、搬送路２３に対して略平行に退避するように後述する駆動モータ１６により駆動される。   The protrusion 18 provided on the rotating member 30 is driven by a drive motor 16 described later so as to retract substantially parallel to the transport path 23 when the upper unit 12 is closed (FIG. 1).

下側ユニット１３には、駆動モータ１６が配置されており、駆動モータ１６のモータ軸に固定されたギヤ１６ａは、２つのギヤ１７からなるギヤ列を介して回動部材３０のギヤ歯３０ａに連結されている。   The lower unit 13 is provided with a drive motor 16, and a gear 16 a fixed to the motor shaft of the drive motor 16 is connected to a gear tooth 30 a of the rotating member 30 via a gear train composed of two gears 17. It is connected.

また、下側ユニット１３には、上側ユニット１２の開方向及び閉方向の回動動作を検知するための開閉検知スイッチ１５が配置されている。開閉検知スイッチ１５は、上側ユニット１２の閉方向の回動動作時に、上側ユニット１２の回動支点近傍に設けられたレバー１４により押されてＯＮとなり、上側ユニット１２の開方向の回動動作時に、レバー１４が離れてＯＦＦとなる。開閉検知スイッチ１５のＯＮ／ＯＦＦ信号（検知信号）は、不図示の制御部に出力される。なお、開閉検知スイッチに代えて、フォトインタラプタ等による開閉検知センサを用いてもよい。   Further, the lower unit 13 is provided with an open / close detection switch 15 for detecting a rotation operation of the upper unit 12 in the opening direction and the closing direction. The opening / closing detection switch 15 is turned on by being pushed by a lever 14 provided in the vicinity of the rotation fulcrum of the upper unit 12 when the upper unit 12 is rotated in the closing direction, and when the upper unit 12 is rotated in the opening direction. The lever 14 is separated and turned off. An ON / OFF signal (detection signal) of the open / close detection switch 15 is output to a control unit (not shown). In place of the open / close detection switch, an open / close detection sensor such as a photo interrupter may be used.

制御部は、上側ユニット１２の開方向の回動動作時に開閉検知スイッチ１５からＯＦＦ信号が入力されると、駆動モータ１６のモータ軸を図の反時計回り方向に所定量回転させるように制御する。このときのモータ軸の回転駆動力は、ギヤ１６ａから２つのギヤ１７からなるギヤ列を介して回動部材３０のギヤ歯３０ａに伝達される。   The control unit controls the motor shaft of the drive motor 16 to rotate a predetermined amount in the counterclockwise direction in the drawing when an OFF signal is input from the open / close detection switch 15 during the rotation of the upper unit 12 in the opening direction. . The rotational driving force of the motor shaft at this time is transmitted from the gear 16 a to the gear teeth 30 a of the rotating member 30 through the gear train composed of the two gears 17.

これにより、回動部材３０は、上側ユニット１２の開方向の回動動作に連動して図１の状態から時計回り方向に略９０°回動し、突出部１８が載置部２の下流端の位置で搬送路２３に突出して、載置部２に載置された原稿１の動きを規制する。なお、本実施形態では、載置部２と搬送路２３との境界部で突出部１８を突出させているが、該境界部よりも下流側の位置で突出部１８を突出させてもよい。   As a result, the rotating member 30 rotates approximately 90 ° in the clockwise direction from the state of FIG. 1 in conjunction with the rotating operation of the upper unit 12 in the opening direction, and the protruding portion 18 is the downstream end of the mounting portion 2. And the movement of the document 1 placed on the placement unit 2 is restricted. In the present embodiment, the protruding portion 18 is protruded at the boundary portion between the placing portion 2 and the conveyance path 23. However, the protruding portion 18 may be protruded at a position downstream of the boundary portion.

なお、搬送路２３に突出部１８を突出させるタイミングは、上側ユニット１２が開方向へ回動して給送ローラ３と分離ローラ４とが原稿１を挟み込むニップ部が開放される前に、突出部１８が載置部２上の原稿１の動きを規制する位置に配置されるように設定する。   Note that the timing of projecting the projecting portion 18 on the conveyance path 23 is such that the upper unit 12 is pivoted in the opening direction and the projecting portion 18 projects before the nip portion where the feeding roller 3 and the separation roller 4 sandwich the document 1 is opened. The unit 18 is set so as to be disposed at a position that restricts the movement of the document 1 on the placement unit 2.

一方、制御部は、上側ユニット１２の閉方向の回動動作時に開閉検知スイッチ１５からＯＮ信号が出力されると、駆動モータ１６のモータ軸を図の時計回り方向に所定量回転させるように制御する。このときのモータ軸の回転駆動力は、ギヤ１６ａから２つのギヤ１７からなるギヤ列を介して回動部材３０のギヤ歯３０ａに伝達され、回動部材３０が図２の状態から反時計回り方向に略９０°回動して、突出部１８を搬送路２３から退避させる。   On the other hand, the control unit controls the motor shaft of the drive motor 16 to rotate a predetermined amount in the clockwise direction in the drawing when an ON signal is output from the open / close detection switch 15 during the turning operation of the upper unit 12 in the closing direction. To do. The rotational driving force of the motor shaft at this time is transmitted from the gear 16a to the gear teeth 30a of the rotating member 30 through the gear train composed of the two gears 17, and the rotating member 30 rotates counterclockwise from the state of FIG. The protrusion 18 is retracted from the conveyance path 23 by rotating approximately 90 ° in the direction.

かかる退避状態となったときには、給送ローラ３と分離ローラ４との間にニップ部が形成されているため、載置部２に載置された原稿１は前記ニップ部に当接し、通常の読取動作が可能となる。   In such a retracted state, since the nip portion is formed between the feeding roller 3 and the separation roller 4, the document 1 placed on the placement portion 2 comes into contact with the nip portion, Reading operation is possible.

以上説明したように、本実施形態では、上側ユニット１２の閉状態（図１）では、突出部１８が搬送路２３から退避して原稿１の搬送を妨げることなく、通常の読取動作が行なわれる。また、上側ユニット１２の開状態（図２）では、突出部１８が搬送経路２３上に突出し、載置部２に載置された原稿１の動きを規制する。これにより、紙つまり等で上側ユニット１２を開方向に回動操作して傾斜した搬送路２３を開放した際に、載置部２から原稿１が滑落するのを防止することができる。   As described above, in the present embodiment, when the upper unit 12 is in the closed state (FIG. 1), the normal reading operation is performed without the protrusion 18 retracting from the conveyance path 23 and preventing the conveyance of the document 1. . Further, in the open state of the upper unit 12 (FIG. 2), the protruding portion 18 protrudes on the conveyance path 23 and restricts the movement of the document 1 placed on the placing portion 2. Thereby, it is possible to prevent the original 1 from slipping off from the placing portion 2 when the inclined conveying path 23 is opened by rotating the upper unit 12 in the opening direction with paper or the like.

また、上側ユニット１２の開状態（図２）では、突出部１８が搬送経路２３上に突出し、載置部２に載置された原稿１の動きを規制することから、搬送路２３の傾斜角度を垂直に近づけることができ、画像読取装置の設置面積を小さくすることができる。なお、回動部材とは別に回動部材と同軸で駆動モータから駆動力が伝達されるギヤを設け、該ギヤと回動部材とを軸部材等で連結してもよい。   In the open state of the upper unit 12 (FIG. 2), the protruding portion 18 protrudes on the conveying path 23 and restricts the movement of the document 1 placed on the placing portion 2. Can be brought close to vertical, and the installation area of the image reading apparatus can be reduced. In addition to the rotating member, a gear that is coaxial with the rotating member and that transmits a driving force from the drive motor may be provided, and the gear and the rotating member may be connected by a shaft member or the like.

（第２の実施形態）
次に、図３及び図４を参照して、本発明の第２の実施形態であるシート搬送装置を備える画像読取装置を説明する。なお、上記第１の実施形態に対して重複又は相当する部分については、各図に同一符号を付してその説明を省略する。 (Second Embodiment)
Next, with reference to FIGS. 3 and 4, an image reading apparatus including a sheet conveying apparatus according to a second embodiment of the present invention will be described. In addition, about the part which overlaps or corresponds to the said 1st Embodiment, the same code | symbol is attached | subjected to each figure and the description is abbreviate | omitted.

本実施形態では、上側ユニット１２に、ヒンジ１１の回動支点と略同心に配置されるギヤ１９が一体に設けられており、ギヤ１９は、４つのギヤ１７からなるギヤ列を介して回動部材３のギヤ歯３０ａに連結されている。なお、ギヤ１９は、上側ユニット１２とは別体とし、上側ユニット１２と一緒に動くように取り付けられていてもよい。   In the present embodiment, the upper unit 12 is integrally provided with a gear 19 that is disposed substantially concentrically with the rotation fulcrum of the hinge 11, and the gear 19 is rotated via a gear train composed of four gears 17. The gear teeth 30a of the member 3 are connected. The gear 19 may be separated from the upper unit 12 and attached so as to move together with the upper unit 12.

そして、図４に示すように、図３の状態から上側ユニット１２を開方向に回動させると、ギヤ１９が図の反時計回り方向に回動して、その回転力が４つのギヤ１７からなるギヤ列を介して回動部材３０のギヤ歯３０ａに伝達される。   Then, as shown in FIG. 4, when the upper unit 12 is turned in the opening direction from the state shown in FIG. 3, the gear 19 is turned counterclockwise in the figure, and the rotational force is generated from the four gears 17. Is transmitted to the gear teeth 30a of the rotating member 30 through the gear train.

これにより、回動部材３０が図３の状態から時計回り方向に略９０°回動して、突出部１８が載置部２の下流端の位置で搬送路２３に突出し、載置部２に載置された原稿１の動きを規制する。なお、本実施形態では、載置部２と搬送路２３との境界部で突出部１８を突出させているが、該境界部よりも下流側の位置で突出部１８を突出させてもよい。   As a result, the rotating member 30 rotates approximately 90 ° in the clockwise direction from the state of FIG. 3, and the protruding portion 18 protrudes into the conveyance path 23 at the position of the downstream end of the mounting portion 2. The movement of the placed document 1 is restricted. In the present embodiment, the protruding portion 18 is protruded at the boundary portion between the placing portion 2 and the conveyance path 23. However, the protruding portion 18 may be protruded at a position downstream of the boundary portion.

また、図４の状態から上側ユニット１２を閉方向に回動させると、ギヤ１９が図の時計回り方向に回動して、その回転力が４つのギヤ１７からなるギヤ列を介して回動部材３０のギヤ歯３０ａに伝達される。   Further, when the upper unit 12 is rotated in the closing direction from the state of FIG. 4, the gear 19 is rotated in the clockwise direction in the figure, and the rotational force is rotated through the gear train composed of the four gears 17. It is transmitted to the gear teeth 30a of the member 30.

これにより、回動部材３０が図４の状態から反時計回り方向に略９０°回動して、突出部１８を搬送路２３から図３の位置に退避させる。かかる退避状態となったときには、給送ローラ３と分離ローラ４との間にニップ部が形成されているため、載置部２に載置された原稿１は前記ニップ部に当接し、通常の読取動作が可能となる。   As a result, the rotating member 30 is rotated approximately 90 ° counterclockwise from the state of FIG. 4, and the protruding portion 18 is retracted from the conveying path 23 to the position of FIG. 3. In such a retracted state, since the nip portion is formed between the feeding roller 3 and the separation roller 4, the document 1 placed on the placement portion 2 comes into contact with the nip portion, Reading operation is possible.

以上説明したように、本実施形態では、上側ユニット１２の回動動作をギヤ列を利用して回転部材３０に伝達するため、センサやモータ等の部品を設ける必要がなくなり、構造が簡素化されて低コスト化を図ることができる。その他の構成及び作用効果は、上記第１の実施形態と同様である。   As described above, in the present embodiment, since the rotation operation of the upper unit 12 is transmitted to the rotating member 30 using the gear train, it is not necessary to provide components such as a sensor and a motor, and the structure is simplified. Cost reduction. Other configurations and operational effects are the same as those of the first embodiment.

（第３の実施形態）
次に、図５及び図６を参照して、本発明の第３の実施形態であるシート搬送装置を備える画像読取装置を説明する。なお、上記第１の実施形態に対して重複又は相当する部分については、各図に同一符号を付してその説明を省略する。 (Third embodiment)
Next, with reference to FIGS. 5 and 6, an image reading apparatus including a sheet conveying apparatus according to a third embodiment of the present invention will be described. In addition, about the part which overlaps or corresponds to the said 1st Embodiment, the same code | symbol is attached | subjected to each figure and the description is abbreviate | omitted.

本実施形態では、下側ユニット１３に、例えば円形の伝達部材２０が回動可能に支持されている。伝達部材２０と上側ユニット１２のヒンジ１１近傍位置との間は、リンク２１で連結され、伝達部材２０と回動部材３０との間は、リンク２２で連結されている。なお、本実施形態では、回動部材３０にギヤ歯３０ａは設けられていない。   In the present embodiment, for example, a circular transmission member 20 is rotatably supported by the lower unit 13. The transmission member 20 and the position near the hinge 11 of the upper unit 12 are connected by a link 21, and the transmission member 20 and the rotation member 30 are connected by a link 22. In the present embodiment, the gear member 30 a is not provided on the rotating member 30.

そして、図６に示すように、図５の状態から上側ユニット１２を開方向に回動させると、リンク２１が伝達部材２０を図の反時計回り方向に回動させ、この伝達部材２０の回動により、リンク２２が回動部材３０を図５の状態から時計回り方向に略９０°回動させる。これにより、突出部１８が載置部２の下流端の位置で搬送路２３に突出し、載置部２に載置された原稿１の動きを規制する。なお、本実施形態では、載置部２と搬送路２３との境界部で突出部１８を突出させているが、該境界部よりも下流側の位置で突出部１８を突出させてもよい。   Then, as shown in FIG. 6, when the upper unit 12 is rotated in the opening direction from the state of FIG. 5, the link 21 rotates the transmission member 20 in the counterclockwise direction of the drawing, and the rotation of the transmission member 20 is performed. By the movement, the link 22 rotates the rotating member 30 by approximately 90 ° in the clockwise direction from the state of FIG. As a result, the protruding portion 18 protrudes into the conveyance path 23 at the position of the downstream end of the placing portion 2 and restricts the movement of the document 1 placed on the placing portion 2. In the present embodiment, the protruding portion 18 is protruded at the boundary portion between the placing portion 2 and the conveyance path 23. However, the protruding portion 18 may be protruded at a position downstream of the boundary portion.

また、図６の状態から上側ユニット１２を閉方向に回動させると、リンク２１が伝達部材２０を図の時計回り方向に回動させ、この伝達部材２０の回動により、リンク２２が回動部材３０を図６の状態から反時計回り方向に略９０°回動させる。   Further, when the upper unit 12 is rotated in the closing direction from the state of FIG. 6, the link 21 rotates the transmission member 20 in the clockwise direction in the figure, and the link 22 is rotated by the rotation of the transmission member 20. The member 30 is rotated approximately 90 ° counterclockwise from the state shown in FIG.

これにより、突出部１８が搬送路２３から図５の位置に退避し、かかる退避状態となったときには、給送ローラ３と分離ローラ４との間にニップ部が形成されているため、載置部２に載置された原稿１は前記ニップ部に当接し、通常の読取動作が可能となる。   As a result, the protruding portion 18 is retracted from the conveying path 23 to the position shown in FIG. 5, and when this retracted state is reached, a nip portion is formed between the feeding roller 3 and the separation roller 4. The document 1 placed on the section 2 comes into contact with the nip portion and can perform a normal reading operation.

以上説明したように、本実施形態では、上側ユニット１２の回動動作をリンク機構を利用して回転部材３０に伝達するため、センサやモータ等の部品を設ける必要がなくなり、構造が簡素化されて低コスト化を図ることができる。その他の構成及び作用効果は、上記第１の実施形態と同様である。   As described above, in the present embodiment, since the rotation operation of the upper unit 12 is transmitted to the rotating member 30 using the link mechanism, it is not necessary to provide components such as a sensor and a motor, and the structure is simplified. Cost reduction. Other configurations and operational effects are the same as those of the first embodiment.

（第４の実施形態）
次に、図７及び図８を参照して、本発明の第４の実施形態であるシート搬送装置を備える画像読取装置を説明する。なお、上記第１の実施形態に対して重複又は相当する部分については、各図に同一符号を付してその説明を省略する。 (Fourth embodiment)
Next, with reference to FIGS. 7 and 8, an image reading apparatus provided with a sheet conveying apparatus according to a fourth embodiment of the present invention will be described. In addition, about the part which overlaps or corresponds to the said 1st Embodiment, the same code | symbol is attached | subjected to each figure and the description is abbreviate | omitted.

本実施形態では、図８に示すように、上側ユニット１２の開状態では、引張りコイルばね２４により、回動部材３０が図の時計回り方向に付勢されて、突出部１８が載置部２の下流端の位置で搬送路２３に突出し、載置部２に載置された原稿１の動きを規制する。なお、なお、本実施形態では、載置部２と搬送路２３との境界部で突出部１８を突出させているが、該境界部よりも下流側の位置で突出部１８を突出させてもよい。また、本実施形態では、回動部材３０にギヤ歯３０ａは設けられていない。   In the present embodiment, as shown in FIG. 8, in the open state of the upper unit 12, the rotating member 30 is urged clockwise by the tension coil spring 24, and the protrusion 18 is placed on the mounting portion 2. The movement of the document 1 that protrudes into the conveyance path 23 at the downstream end position and is placed on the placement unit 2 is restricted. Note that, in the present embodiment, the protruding portion 18 protrudes at the boundary portion between the placing portion 2 and the transport path 23, but the protruding portion 18 may protrude at a position downstream of the boundary portion. Good. In the present embodiment, the gear member 30 a is not provided on the rotating member 30.

また、上側ユニット１２の閉方向の回動動作時には、上側ユニット１２に設けた押圧レバー（押圧部材）２５が、突出部１８を引張りコイルばね２４の付勢力に抗して図の反時計回り方向に押圧して回動部材３０と共に同方向に回動させる。   When the upper unit 12 is rotated in the closing direction, the pressing lever (pressing member) 25 provided in the upper unit 12 counteracts the urging force of the pulling coil spring 24 against the urging force of the coil spring 24 in the counterclockwise direction in the figure. To rotate in the same direction together with the rotating member 30.

これにより、突出部１８が搬送路２３から図７の位置に退避し、かかる退避状態となったときには、給送ローラ３と分離ローラ４との間にニップ部が形成されているため、載置部２に載置された原稿１は前記ニップ部に当接し、通常の読取動作が可能となる。   As a result, the protruding portion 18 is retracted from the conveyance path 23 to the position shown in FIG. 7, and when this retracted state is reached, a nip portion is formed between the feeding roller 3 and the separation roller 4. The document 1 placed on the section 2 comes into contact with the nip portion and can perform a normal reading operation.

以上説明したように、本実施形態では、引張りコイルばね２４を利用して回転部材３０を回動動作させるため、センサやモータ等の部品や、ギヤ機構、リンク機構等を設ける必要がなくなり、構造がより簡素化されて更なる低コスト化を図ることができる。その他の構成及び作用効果は、上記第１の実施形態と同様である。   As described above, in this embodiment, since the rotary member 30 is rotated using the tension coil spring 24, there is no need to provide parts such as a sensor and a motor, a gear mechanism, a link mechanism, and the like. Can be further simplified and further cost reduction can be achieved. Other configurations and operational effects are the same as those of the first embodiment.

（第５の実施形態）
次に、図９及び図１０を参照して、本発明の第５の実施形態であるシート搬送装置を備える画像読取装置を説明する。なお、上記第１の実施形態に対して重複又は相当する部分については、各図に同一符号を付してその説明を省略する。 (Fifth embodiment)
Next, with reference to FIGS. 9 and 10, an image reading apparatus including a sheet conveying apparatus according to a fifth embodiment of the present invention will be described. In addition, about the part which overlaps or corresponds to the said 1st Embodiment, the same code | symbol is attached | subjected to each figure and the description is abbreviate | omitted.

本実施形態では、下側ユニット１３に、ラック歯４０ａが形成されたスライド部材４０が上下方向にスライド可能に支持されており、スライド部材４０の上端には、突出部１８が設けられている。スライド部材４０のラック歯４０ａは、ギヤ１７を介して駆動モータ１６のモータ軸に取り付けられたギヤ１６ａに連結されている。   In the present embodiment, a slide member 40 on which rack teeth 40 a are formed is supported on the lower unit 13 so as to be slidable in the vertical direction, and a protrusion 18 is provided at the upper end of the slide member 40. The rack teeth 40 a of the slide member 40 are connected to the gear 16 a attached to the motor shaft of the drive motor 16 via the gear 17.

また、本実施形態では、上記第１の実施形態と同様に、上側ユニット１２の開閉動作に応じて開閉検知スイッチ１５からＯＮ／ＯＦＦ信号が不図示の制御部に出力される。   In the present embodiment, as in the first embodiment, an ON / OFF signal is output from the open / close detection switch 15 to a control unit (not shown) in accordance with the open / close operation of the upper unit 12.

そして、制御部は、上側ユニット１２の開方向の回動動作時に開閉検知スイッチ１５からＯＦＦ信号が入力されると、駆動モータ１６のモータ軸を図の反時計回り方向に所定量回転させるように制御する。   When the OFF signal is input from the open / close detection switch 15 during the rotation of the upper unit 12 in the opening direction, the control unit rotates the motor shaft of the drive motor 16 by a predetermined amount in the counterclockwise direction in the figure. Control.

このときのモータ軸の回転駆動力は、ギヤ１６ａから２つのギヤ１７を介してスライド部材４０のラック歯４０ａに伝達され、スライド部材４０を上方向にスライド移動させる。これにより、突出部１８が載置部２の下流端の位置で搬送路２３に突出し、載置部２に載置された原稿１の動きを規制する。なお、なお、本実施形態では、載置部２と搬送路２３との境界部で突出部１８を突出させているが、該境界部よりも下流側の位置で突出部１８を突出させてもよい。   The rotational driving force of the motor shaft at this time is transmitted from the gear 16a to the rack teeth 40a of the slide member 40 via the two gears 17, and slides the slide member 40 upward. As a result, the protruding portion 18 protrudes into the conveyance path 23 at the position of the downstream end of the placing portion 2 and restricts the movement of the document 1 placed on the placing portion 2. Note that, in the present embodiment, the protruding portion 18 protrudes at the boundary portion between the placing portion 2 and the transport path 23, but the protruding portion 18 may protrude at a position downstream of the boundary portion. Good.

なお、搬送路２３上に突出部１８を突出させるタイミングは、上側ユニット１２が開方向へ回動して給送ローラ３と分離ローラ４との前記ニップ部が開放される前に、突出部１８が載置部２に載置された原稿１の動きを規制する位置に配置されるように設定する。   It should be noted that the timing of projecting the projecting portion 18 on the transport path 23 is such that the upper unit 12 rotates in the opening direction before the nip portion between the feeding roller 3 and the separation roller 4 is opened. Is set to a position that restricts the movement of the document 1 placed on the placement unit 2.

一方、制御部は、上側ユニット１２の閉方向の回動動作時に開閉検知スイッチ１５からＯＮ信号が出力されると、駆動モータ１６のモータ軸を図の時計回り方向に所定量回転させるように制御する。   On the other hand, the control unit controls the motor shaft of the drive motor 16 to rotate a predetermined amount in the clockwise direction in the drawing when an ON signal is output from the open / close detection switch 15 during the turning operation of the upper unit 12 in the closing direction. To do.

このときのモータ軸の回転駆動力は、ギヤ１６ａからギヤ１７を介してスライド部材４０のラック歯４０ａに伝達され、スライド部材４０を下方向にスライド移動させて、突出部１８を搬送路２３から退避させる。   The rotational driving force of the motor shaft at this time is transmitted from the gear 16 a to the rack teeth 40 a of the slide member 40 via the gear 17, and the slide member 40 is slid downward to move the protrusion 18 from the conveyance path 23. Evacuate.

かかる退避状態では、給送ローラ３と分離ローラ４との間にニップ部が形成されるため、載置部２に載置された原稿１は前記ニップ部に当接し、通常の読取動作が可能となる。   In such a retracted state, since a nip portion is formed between the feeding roller 3 and the separation roller 4, the document 1 placed on the placement portion 2 abuts on the nip portion and can perform a normal reading operation. It becomes.

なお、本実施形態では、上記第１の実施形態に対して、スライド移動する突出部を適用した場合を例示したが、上記第２〜第４の実施形態に対しても、同様に、スライド移動する突出部を適用してもよい。   In the present embodiment, the case where the projecting portion that slides is applied to the first embodiment has been illustrated, but the sliding movement is similarly applied to the second to fourth embodiments. Protruding portions may be applied.

以上説明したように、本実施形態では、スライド部材４０の上下方向のスライド移動により突出部１８を搬送路に対して突出、退避させているので、突出部１８が挿通する貫通穴を搬送ガイド等に形成する際に、該貫通穴を小さくすることができる。これにより、貫通穴から搬送路２３上のゴミ等が装置内に侵入しにくくすることができる。その他の構成及び作用効果は、上記第１の実施形態と同様である。   As described above, in the present embodiment, the protrusion 18 protrudes and retracts from the transport path by the sliding movement of the slide member 40 in the vertical direction. The through-hole can be made smaller when formed into a thin film. Thereby, it is possible to make it difficult for dust or the like on the conveyance path 23 to enter the apparatus from the through hole. Other configurations and operational effects are the same as those of the first embodiment.

なお、本発明の構成は、上記各実施形態に例示したものに限定されるものではなく、材質、形状、寸法、形態、数、配置箇所等は、本発明の要旨を逸脱しない範囲において適宜変更可能である。   The configuration of the present invention is not limited to those exemplified in the above embodiments, and the material, shape, dimensions, form, number, arrangement location, and the like are appropriately changed without departing from the gist of the present invention. Is possible.

例えば、ギヤ等を用いた実施形態をベルト等の動力伝達機構を用いた形態に変更してもよく、ギヤとベルト等を併用してもよい。また、以上説明した各実施形態の任意の構成要素を他の実施形態に追加してもよく、これもまた本発明に含まれる。   For example, the embodiment using a gear or the like may be changed to a form using a power transmission mechanism such as a belt, or a gear and a belt may be used in combination. Moreover, you may add the arbitrary component of each embodiment described above to other embodiment, and this is also contained in this invention.

本発明の第１の実施形態であるシート搬送装置を備える画像読取装置を説明するための概略断面図である。1 is a schematic cross-sectional view for explaining an image reading apparatus including a sheet conveying apparatus according to a first embodiment of the present invention. 図１に示す画像読取装置の上側ユニットを開いた状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which opened the upper unit of the image reading apparatus shown in FIG. 本発明の第２の実施形態であるシート搬送装置を備える画像読取装置を説明するための概略断面図である。It is a schematic sectional drawing for demonstrating the image reading apparatus provided with the sheet conveying apparatus which is the 2nd Embodiment of this invention. 図３に示す画像読取装置の上側ユニットを開いた状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which opened the upper unit of the image reading apparatus shown in FIG. 本発明の第３の実施形態であるシート搬送装置を備える画像読取装置を説明するための概略断面図である。It is a schematic sectional drawing for demonstrating the image reading apparatus provided with the sheet conveying apparatus which is the 3rd Embodiment of this invention. 図５に示す画像読取装置の上側ユニットを開いた状態を示す概略断面図である。FIG. 6 is a schematic cross-sectional view showing a state where an upper unit of the image reading apparatus shown in FIG. 5 is opened. 本発明の第４の実施形態であるシート搬送装置を備える画像読取装置を説明するための概略断面図である。It is a schematic sectional drawing for demonstrating the image reading apparatus provided with the sheet conveying apparatus which is the 4th Embodiment of this invention. 図７に示す画像読取装置の上側ユニットを開いた状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which opened the upper unit of the image reading apparatus shown in FIG. 本発明の第５の実施形態であるシート搬送装置を備える画像読取装置を説明するための概略断面図である。It is a schematic sectional drawing for demonstrating the image reading apparatus provided with the sheet conveying apparatus which is the 5th Embodiment of this invention. 図９に示す画像読取装置の上側ユニットを開いた状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which opened the upper unit of the image reading apparatus shown in FIG.

符号の説明Explanation of symbols

１ 原稿
２ 載置部
３ 給送ローラ
４ 分離ローラ
５ 給紙口
６ 搬送ローラ対
７ 画像読取部
８ 画像読取部
９ 排紙ローラ
１０ 排紙トレイ
１１ ヒンジ
１２ 上側ユニット
１３ 下側ユニット
１４ レバー
１５ 開閉検知スイッチ
１６ 駆動モータ
１６ａ ギヤ
１７ ギヤ
１８ 突出部
１９ ギヤ
２０ 伝達部材
２１ リンク
２２ リンク
２３ 搬送路
２４ 引張りコイルばね
２５ 押圧レバー
３０ 回動部材
３０ａ ギヤ歯
４０ スライド部材
４０ａ ラック歯 DESCRIPTION OF SYMBOLS 1 Document 2 Placement part 3 Feeding roller 4 Separation roller 5 Paper feed port 6 Conveying roller pair 7 Image reading part 8 Image reading part 9 Paper discharge roller 10 Paper discharge tray 11 Hinge 12 Upper unit 13 Lower unit 14 Lever 15 Opening and closing Detection switch 16 Drive motor 16a Gear 17 Gear 18 Projection 19 Gear 20 Transmission member 21 Link 22 Link 23 Transport path 24 Tension coil spring 25 Press lever 30 Rotating member 30a Gear tooth 40 Slide member 40a Rack tooth

Claims (8)

下側ユニットと、該下側ユニットに対して開閉する方向に回動可能に支持され、閉状態で前記下側ユニットとの間に、水平設置面に対して高い位置から低い位置に向けてシートを斜めに搬送する搬送路を形成する上側ユニットとを有するシート搬送装置であって、
前記搬送路の上流端に配置され、該搬送路に送り出される複数枚のシートが載置される載置部と、
該載置部と前記搬送路との境界部又は該境界部の下流側の位置で、該搬送路に対して突出が可能な突出部を、前記上側ユニットの開方向への回動動作に連動して前記搬送路に突出させ、前記載置部に載置されたシートの動きを規制する規制手段と、を備える
ことを特徴とするシート搬送装置。 The lower unit and the lower unit are supported so as to be pivotable in a direction to open and close, and in the closed state, the seat is placed from the high position to the low position with respect to the horizontal installation surface between the lower unit. A sheet conveying apparatus having an upper unit that forms a conveying path for conveying the sheet obliquely,
A placement unit that is disposed at an upstream end of the conveyance path and on which a plurality of sheets sent to the conveyance path are placed;
A projecting portion capable of projecting with respect to the transport path at a boundary portion between the placement section and the transport path or a position downstream of the boundary section is interlocked with the rotation operation of the upper unit in the opening direction. And a restricting means for restricting the movement of the sheet placed on the placement section and protruding in the transport path. 前記規制手段は、前記上側ユニットの開方向及び閉方向の回動動作を検知する検知手段と、
前記突出部を前記搬送路に突出する位置と該搬送路から退避する位置とに移動させる移動手段と、
該移動手段に駆動力を伝達する駆動手段と、
前記検知手段からの検知信号に基づいて前記駆動手段を制御する制御手段と、を備える ことを特徴とする請求項１に記載のシート搬送装置。 The restricting means is a detecting means for detecting a rotation operation of the upper unit in an opening direction and a closing direction;
Moving means for moving the protruding portion to a position protruding from the conveying path and a position retracting from the conveying path;
Driving means for transmitting a driving force to the moving means;
The sheet conveying apparatus according to claim 1, further comprising: a control unit that controls the driving unit based on a detection signal from the detection unit. 前記規制手段は、前記上側ユニットの開方向及び閉方向の回動動作時の回転力を前記突出部に伝達するギヤ機構を備える
ことを特徴とする請求項１に記載のシート搬送装置。 The sheet conveying apparatus according to claim 1, wherein the restricting unit includes a gear mechanism that transmits a rotational force when the upper unit is rotated in the opening direction and the closing direction to the protruding portion. 前記規制手段は、前記上側ユニットの開方向及び閉方向の回動動作時の回転力を前記突出部に伝達するリンク機構を備える
ことを特徴とする請求項１に記載のシート搬送装置。 The sheet conveying apparatus according to claim 1, wherein the restricting unit includes a link mechanism that transmits a rotational force when the upper unit is rotated in an opening direction and a closing direction to the protruding portion. 前記規制手段は、前記突出部を前記搬送路に突出させる方向に付勢する付勢手段と、
前記上側ユニットに設けられ、該上側ユニットが閉方向に回動動作する際に、前記突出部を前記付勢手段の付勢力に抗して前記搬送路から退避する位置に移動させる押圧部材と、を備える
ことを特徴とする請求項１に記載のシート搬送装置。 The restricting means is an urging means for urging the projecting portion in a direction to project the projecting path into the transport path;
A pressing member which is provided in the upper unit and moves the protruding portion to a position where the protruding portion is retracted from the conveyance path against the urging force of the urging means when the upper unit rotates in the closing direction; The sheet conveying apparatus according to claim 1, comprising: 前記突出部は、前記下側ユニットに対して回動可能に支持される、
ことを特徴とする請求項１〜５のいずれか一項に記載のシート搬送装置。 The protrusion is rotatably supported with respect to the lower unit.
The sheet conveying apparatus according to claim 1, wherein the sheet conveying apparatus is a sheet conveying apparatus. 前記突出部は、前記下側ユニットに対してスライド可能に支持される、
ことを特徴とする請求項１〜５のいずれか一項に記載のシート搬送装置。 The protruding portion is slidably supported with respect to the lower unit.
The sheet conveying apparatus according to claim 1, wherein the sheet conveying apparatus is a sheet conveying apparatus. シート搬送装置によって搬送路を搬送される原稿の画像を読み取る画像読取装置であって、
前記シート搬送装置として、請求項１〜７のいずれか一項に記載のシート搬送装置を用いる、
ことを特徴とする画像読取装置。 An image reading device for reading an image of a document conveyed on a conveyance path by a sheet conveying device,
As the sheet conveying apparatus, the sheet conveying apparatus according to any one of claims 1 to 7, is used.
An image reading apparatus.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015193445A (en) * 2014-03-31 2015-11-05 ブラザー工業株式会社 Feeder and image recorder

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JP2007168947A (en) * 2005-12-20 2007-07-05 Ricoh Co Ltd Automatic document carrying device and image forming device
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JP2008265887A (en) * 2007-04-16 2008-11-06 Canon Electronics Inc Image reading device

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JPH10194501A (en) * 1997-01-10 1998-07-28 Canon Inc Sheet feeding device, and image processing device
JP2007168947A (en) * 2005-12-20 2007-07-05 Ricoh Co Ltd Automatic document carrying device and image forming device
JP2008224821A (en) * 2007-03-09 2008-09-25 Brother Ind Ltd Image forming apparatus
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JP2015193445A (en) * 2014-03-31 2015-11-05 ブラザー工業株式会社 Feeder and image recorder

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