JPH10120198A - Automatic document feeder - Google Patents

Abstract

(57) Abstract: The present invention relates to an automatic document feeder that is mounted on an image reading device such as a copying machine, separates documents one by one, and feeds them to a reading position on the apparatus main body side. It is an object of the present invention to achieve both miniaturization and prevention of double feeding by reliably restricting the feeding of a document other than the uppermost document even when the push-up member for pressing the document is reduced in size. A push-up plate (14) for pressing a document (P) on a document mounting table (9) against a call-out roller (10) and sending it out to a separation portion of a sheet feed belt (11) and a sheet feed prevention roller (12) is provided.
and a turning fulcrum 14a at the end of the rear end portion 14b is disposed below the extension surface of the front end portion 14c close to the call roller 10 by bending between the front end portion 14c and the rear end portion 14b. A limiting pad 51 having a coefficient of friction equal to or greater than a predetermined value and having a width corresponding to the call roller 10 is provided between the ends of the rear end 14b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic document feeder mounted on an image reading apparatus, and more particularly, to an automatic document feeder for separating originals one by one from a bundle of originals and automatically conveying the originals to an original reading position on the apparatus body side. About.

[0002]

2. Description of the Related Art Conventionally, in an image reading apparatus such as a copying machine or a facsimile apparatus, when a bundle of originals composed of a plurality of originals is set on an original mounting table and a job start switch is pressed, one original is read. There is an apparatus equipped with an automatic document feeder that separates the originals one by one and transports them to a reading position on the apparatus main body side, and discharges the read originals onto a document discharge table.

[0003] An automatic document feeder of this type is described, for example, in Japanese Patent Laid-Open No. 6-92482. In this automatic document feeder (hereinafter referred to as a first conventional example), the upper surface of the set document bundle is pressed against a call roller (rotating member) by turning the document stack on the leading end side of a document table on which the document bundle is set. A push-up plate (a push-up member) is provided.

Japanese Patent Application Laid-Open No. 6-255806 describes an automatic document feeder (hereinafter referred to as a second conventional example) in which the middle of a push-up plate is bent and a document is pressed against a call roller at the end thereof. I have.

[0005]

However, in such an automatic document feeder, in order to stably feed the document in the direction of the separation section where the document is separated by the call roller,
The push-up plate needs to press the original against the call roller so that the extension surface of the leading end of the original is directed toward the separation portion. For this reason,
In the first conventional example, since the push-up plate is a flat plate, a rotation fulcrum of the push-up plate must be provided near the extension surface from the separation portion. There is a problem that it must be formed in a long length, and it becomes large and heavy.

Further, in the second prior art, since the push-up plate is bent, its pivot can be provided below the extension surface from the separation portion, and the push-up plate is formed short. Although a large number of documents can be processed even if the size is reduced, a problem arises in that it is difficult to prevent double feeding of documents. Specifically, in the case of a flat push-up plate as in the first conventional example, a friction force (smaller than that between the call roller and the document) is generated between the documents on the opposing surface of the call roller. By adhering a pad or the like for restricting the feeding of the original, it is possible to limit the feeding of the original other than the uppermost original which comes into contact with the call roller, but if the push-up plate is bent as in the second conventional example, a large amount of When the original is set, the bent portion of the push-up plate presses the original against the recall roller, so that the feeding of the original cannot be restricted by the pad, and the double feed cannot be prevented. Was.

[0007] Restricting the feeding of documents other than the uppermost document means limiting the sending of the entire document bundle together with at least the uppermost document (the same applies to the following description).

Accordingly, the present invention realizes both miniaturization and prevention of double feeding by reliably restricting the feeding of a document other than the uppermost document even when the push-up member for pressing the document against the calling means is reduced in size. The purpose is to do.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 is a document loading table on which a plurality of documents can be set, and a calling means for calling the loaded documents downstream in the transport direction. Separation feeding means for separating the called document one by one from the uppermost sheet and feeding the separated document, and transport means for transporting the fed document to a document reading position on the apparatus main body side; In an automatic document feeder mounted on an image reading device, a rotating member provided in a calling means and rotating while coming into contact with the upper surface of a document on a document placing table and sending the document downstream in the transport direction, and a rotating member provided on the document placing table A push-up member that pushes up the set original by rotating the original with the downstream side in the transport direction of the original as a rotation tip and using the upstream side as a rotation fulcrum to press the upper surface of the original against the rotating member of the calling means; And press Bending between the leading end and the trailing end of the member, and extending from the facing surface of the leading end of the push-up member, which is at least close to and facing the rotating member of the calling means, to the bent portion to limit the feeding of the document The present invention is characterized in that a restricting means is provided.

According to a second aspect of the present invention, there is provided an original placing table on which a plurality of originals can be set, a calling means for calling the set originals downstream in the transport direction, and a calling original from the top. An automatic document feeder mounted on an image reading apparatus includes a separating sheet feeding means for separating and feeding one sheet at a time, and a conveying means for conveying a fed document to a document reading position on the apparatus main body side. A rotating member that is provided in the calling means and rotates while coming into contact with the upper surface of the original on the original placing table to feed the original to the downstream side in the transport direction; A push-up member that pushes up the set original by rotating the upstream side as a rotation fulcrum and presses the upper surface of the original against the rotating member of the calling means, and has a leading end and a rear end of the push-up member. Curved between Causes and is characterized in that a limiting means for limiting the feeding of the document in a position to press the upper surface of the document set in close proximity to the rotating member of the at least call means pressing the upper member.

According to the first aspect of the present invention, the push-up member is bent between the front end and the rear end, and according to the second aspect of the present invention, the front end and the rear end are bent. Since the space between them is convexly curved, the rotation fulcrum can be disposed at a position separated downward from the tangential extension surface on the distal end side in a state close to the rotating member of the calling means. In addition, the front-end | tip part and the rear-end part here mean the front-end | tip side and the rear-end side of the bending part of the push-up member.

According to the first aspect of the present invention, since there is provided a restricting means for restricting the feeding of the original from at least the surface of the push-up member facing the rotating member of the calling means to the bent portion, the set original is reduced in a small amount. In this case, the feeding of the document is restricted by the restricting means located on the opposing surface of the leading end, while when the amount of the set documents is large, the restricting means located at the bent portion between the leading end and the trailing end is used. The feeding of the original is restricted. Further, in the invention described in claim 2, the restricting means is provided at a position where at least the upper surface of the document set close to the rotating member of the pushing means of the push-up member is pressed, that is, the number of sheets of the document (a little (Thickness) is provided so as to cover the position where the upper surface of the original, which changes according to the thickness, is pressed against the rotating member. On the other hand, when a large number of originals are set, the feeding of the originals is restricted by the restricting means located on the rear end side.

Here, the restricting means may be such that a material having a certain coefficient of friction, such as cork material, is attached to the surface of the push-up member, or the surface itself of the push-up member is processed so as to have a certain coefficient of friction. Is also good. Also, it goes without saying that the restricting means may be formed on the entire surface between the front end and the rear end.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1 to 4 are views showing a first embodiment of the automatic document feeder according to the present invention, and show an example in which the automatic document feeder is mounted on an image reading apparatus equipped with an image reading apparatus. This embodiment corresponds to the first aspect of the present invention.

First, a schematic configuration of an automatic document feeder to which this embodiment is applied will be described.

In FIG. 1, reference numeral 1 denotes a copying machine provided with an image reading device, and a slit glass (reading position) 2 and a contact glass 3 are provided on the upper surface of the copying machine 1; An exposure lamp 4 as an image reading means and a first mirror 5 are provided below the glass 3.
Etc. are provided. The image reading means of the copying machine 1
When reading the document P set on the contact glass 3, the exposure lamp 4 and the first mirror 5 move in the left-right direction in the drawing below the contact glass 3 to read the document surface. When reading the original P, the original surface is read in a state where the exposure lamp 4 and the first mirror 5 are stopped below the slit glass 2, and the reading method is publicly known, and therefore will not be described in detail. The first mirror 5 and a lens (not shown) form an image of light reflected by the exposure lamp 4 from the document surface on an image forming element such as a CCD.

An automatic document feeder (hereinafter, simply referred to as an ADF) 6 is mounted on an upper surface of the copying machine 1, and the lower surface of the ADF 6 covers a document P placed on the contact glass 3. A reflection plate 7 which is pressed against the contact glass 3 and serves as a white reference when reading the document P is provided. The ADF 6 is connected to the copying machine 1 via a hinge (not shown), and is freely movable toward and away from the upper surface of the copying machine 1.

The ADF 6 has a document table 9 on the top.
A document bundle made up of a plurality of documents P is set (placed) on the document table 9. The document P set on the document mounting table 9 is sent out between the sheet feeding belt 11 and the sheet feeding preventing roller 12 (separating section) by the contacting rotation of the call roller 10 on the upper surface thereof. When the paper feed belt 11 rotates in the transport direction, and the paper feed preventing rollers 12 rotate in the opposite direction to the transport direction, the uppermost original P is separated and fed one by one. That is, the calling roller 10 constitutes a rotating member of the calling means, and the sheet feeding belt 11 and the sheet feeding preventing roller 12 constitute the separating sheet feeding means. A stopper member 13 is provided downstream of the call roller 10 in the document conveying direction, and the document P placed on the document table 9 is stopped by the stopper member 13 and enters the paper feed belt 11 side. Is banned. The paper feed belt 11 is in pressure contact with the paper feed prevention roller 12 at an arbitrary angle θ.

A push-up plate 14 is provided below the call roller 10, and the push-up plate 14 is turned around a turning fulcrum 14a on the upstream side in the transport direction by a solenoid (not shown), and the front end is called a call roller. It is designed to approach and separate from 10.
That is, the push-up plate 14 constitutes a push-up member, and when a copy start switch on the apparatus main body 1 side is pressed,
The document P is moved from a position shown by a solid line separated from the call roller 10 to a position shown by a virtual line near the call roller 10 to press the document P against the call roller 10, and the document P is sent out by the call roller 10. ing.

The paper feed belt 11 is wound around a driving roller 15 and a driven roller 16 and housed in a case 17. Drive roller
15 is attached to a shaft 15a which is detachably attached to the ADF 6 main body and is driven to rotate.
A one-way clutch 21 is provided between the rollers 15a, and the driving roller 15 rotates clockwise in FIG. On the other hand, the driven roller 16 is supported while being urged in a direction away from the driving roller 15 by a spring 20, and a constant tension is applied to the sheet feeding belt 11 by the spring 20. Also, case 17
Is rotatably supported about a shaft 15a. The case 17 is provided with a revolving roller 10 which is connected to the shaft 15a via a transmission means (not shown) and is rotated. And
The case 17 is positioned by being pressed by an openable and closable paper feed unit cover 18.
Is positioned, the paper feed belt 11 presses and comes into contact with the paper feed prevention roller 12, and the call roller 10 is also positioned.
Conversely, when the case 17 is rotated in the same direction about the shaft 15a as a fulcrum in a state where the paper feeding unit cover 18 is rotated in the opening direction,
The call roller 10 and the paper feed belt 11 can open the upper part of the document P. Note that the paper supply unit cover 18 is attached rotatably about a fulcrum 19.

Here, the drive of the shaft 15a is transmitted to the calling roller 10 via a gap clutch (not shown). The gap clutch is a member having a meshing portion formed so as to transmit the drive of the shaft 15a to the call roller 10 while rotating the shaft 15a by a predetermined angle. When the vehicle rotates, the engagement for transmitting the driving force is released. For this reason, when the trailing end of the uppermost document P comes out of the page roller 10, the rotation of the shaft 15a is not transmitted to the page roller 10 until the rear end rotates by a predetermined angle, and the interval between the following document P is opened during that time. It has become. In order to exhibit such a function, the drive roller 15 and the call roller 10 may be driven via an electromagnetic clutch or a spring clutch instead of the gap clutch.

The paper feed belt 11 and the paper feed prevention roller
The document P separated by 12 is transported while being reversed along a reversing path 25 by a first transport roller 23 and a driven roller 24 which are driven to rotate by a motor (not shown), and is transported toward the slit glass 2. Has become. That is, the first transport roller 23 and the driven roller 24 constitute transport means. The driven roller 24 is a fulcrum of the paper feeding unit cover 18.
The first transport roller 23 is attached to a lever 26 rotatably supported around a center 19 by pressing a tip of the lever 26 by a spring 27 whose end is positioned on the paper feeding unit cover 18. Is pressurized. In the figure, S
Is a registration sensor, and the registration sensor S detects the leading end of the document P in order to temporarily stop it in order to adjust the timing from the carry-out of the previous document P.

The document P conveyed by the first conveying roller 23 and the driven roller 24 is guided by the reversing guide 28, passes over the slit glass 2, and is guided by the reversing discharge guide 29 so as to be scooped up and discharged. The paper is passed through the paper path 30, and thereafter, the second transport roller
After being conveyed (carryed out) by being sandwiched between the driven roller 32 and the driven roller 33 and between the sheet discharging roller 34 and the driven roller 35, the sheet is discharged from the sheet discharging path 30 to the outside, and after the charge is removed by the charge removing brush 36, the outer cover 37 is removed. The paper is ejected on top. When the document P passes over the slit glass 2, the document image is read by the exposure lamp 4, the first mirror 5, and the like. On the slit glass 2, a reflection guide member 31 is provided. The reflection guide member 31 constitutes a white reference at the time of reading and a reflection portion of light from the exposure lamp 4.

On the other hand, the reflection plate 7 covering the contact glass 3 is provided on the lower surface of the pressing plate 38, and the pressing plate 38 presses the original P placed on the contact glass 3 against the glass 3. It has become. This pressure plate 38 is a fulcrum 39
The main frame 40 is rotatably attached to the main frame 40 via a shaft. The main frame 40 has an end attached to the shaft of the driven roller 35 and is fixed to the ADF 6 main body.

The main frame 40 has an area that covers the contact glass 3, and has an outer cover 37 attached to the upper surface thereof, and together with the outer cover 37, constitutes a document discharge table. Further, the pressing plate 38 is connected to an auxiliary frame 42 via a link 41, and the auxiliary frame 42 is formed in a substantially U-shaped cross section so as to sandwich the outer peripheral portion of the main frame 40, and via a fulcrum 43. And is rotatably connected to the main frame 40. Further, a magnet 44 is provided on the main frame 40, and the magnet 44 sucks the auxiliary frame 42.

The auxiliary frame 42 may be entirely made of metal, or may be entirely made of an elastic member such as plastic so that only the portion attracted by the magnet 44 is made of metal. Further, a guide plate 42a constituting a part of the paper discharge path 30 is formed at a tip end portion (left end portion in the figure) of the auxiliary frame 42, and a driven roller 33 is rotatably provided on the guide plate 42a. ing.

The guide plate 42a is provided with a stamp unit 45. The stamp unit 45 is provided at a predetermined position on the downstream side in the transport direction of the document P passing through the slit glass 2 by allowing the stamp to protrude and retract from the guide plate 42a by a solenoid. Stamped on the stamp. By imprinting this stamp, it is possible to confirm the completion of reading and to confirm a double feed failure of the document P.
A handle 46 is provided in a portion of the auxiliary frame 42 near the guide plate 42a, and the handle 46 can be gripped by a user. A stopper 47 is provided on the main frame 40. The stopper 47 abuts on the base end (the right end in the figure) of the auxiliary frame 42, and the auxiliary frame 42 rotates counterclockwise around the fulcrum 43. The rotation of a predetermined amount or more is prohibited.

Next, the features of this embodiment will be described.
2 to 4, the push-up plate 14 constitutes a part of the original placing table 9, and the push-up plate 14 is a rotation fulcrum disposed at the end of the rear end 14b on the upstream side in the transport direction. The document P set on the document table 9 is pushed upward by pressing the document P set on the document table 9 upward, and the upper surface thereof is pressed against the call roller 10 by pivoting around the center 14a and the tip portion 14c approaching the call roller 10.
It is manufactured by bending a single metal plate so that the portion between the front end portion 14c and the rear end portion 14b is bent. In addition,
It is needless to say that the push-up plate 14 is not limited to a metal material and may be made of, for example, a resin material.

The push-up plate 14 has a tip 14 c
The rotation fulcrum 14a is set so that the extension surface thereof is in the direction of the pressure contact portion (separation portion) of the paper feed belt 11 and the paper feed prevention roller 12 when the two are brought close to each other. That is, the rear end portion 14b is bent downward with respect to the distal end portion 14c, and the rotation fulcrum 14a is provided at a position closer to the call roller 10 side below the extension surface of the distal end portion 14c close to the call roller 10. Supported. With this configuration, the push-up plate 14 can reduce the length L (shown in FIG. 3) of the document P in the transport direction even if the length is reduced.
It has a compact configuration in which a large number of documents P can be set sufficiently separated from the calling roller 10 in a lowered state.

The push-up plate 14 has a front end portion 14c and a rear end portion.
A limit pad 51 having a width substantially equal to that of the call roller 10 extending between both end sides (ends) with the end portion 14b and covering the bent portion 14d between the front end portion 14c and the rear end portion 14b is a double-sided tape. The restricting pad 51 is formed of, for example, a cork material having a larger friction coefficient than the surface of the metal material forming the push-up plate 14 itself. The restricting pad 51 generates a frictional force between the original P and the original P that is larger than a frictional force generated between the originals and smaller than a frictional force generated between the call roller 10 and the original P. The document P is pushed up in a state in which the originals P are overlapped at the time of sending by the calling roller 10 by extending from the facing surface of the leading end portion 14c approaching and facing the calling roller 10 to the rear end portion 14b beyond the bent portion 14d. The best original P by keeping it from sliding on the plate 14
Restrict sending out of non. The limit pad 51 is preferably about 0.5 mm from the viewpoint of adhesiveness or the like, but is not limited to this.

More specifically, when the number of the set documents P is small, the distance between the axis of the call roller 10 and the end of the tip portion 14c is a short distance x1, as shown in FIG. Tip 14
Since the document P is pressed against the call roller 10 on the opposing surface of the sheet c, it is possible to restrict the feeding of the document P other than the uppermost document P by the restriction pad 51 located on the opposing surface. On the other hand, if the number of the set documents P is large,
As shown in FIG. 2, a long distance x2
As a result, the document P is pressed against the call roller 10 at the bent portion 14d. However, since the restricting pad 51 is also located at the bent portion 14d, it is possible to restrict the feeding of documents other than the uppermost document P. Note that the restriction pad 51 is
Since the sheet P is provided up to both edges of the rear end portion c and the rear end portion 14b, that is, over the entire surface in the document conveying direction, the document P to be set will not be hit.

The width of the restriction pad 51 is not limited to the width of the call roller 10 and may be formed on the entire surface of the push-up plate 14 in the width direction. This embodiment is sufficient because a frictional force is generated. As described above, in the present embodiment, a large amount of documents P can be set on the short push-up plate 14 by bending the front end portion 14c and the rear end portion 14b to bring the rotation fulcrum 14a closer to the call roller 10 side. Even if it is possible to do so, regardless of the number of the set originals P, the sending out of the originals other than the uppermost original P is restricted by the restricting pad 51 provided from the front end portion 14c to the rear end portion 14b so as to exceed the bent portion 14d. can do. Therefore, the size of the apparatus can be reduced while preventing double feeding of the document P.

As another aspect of the present embodiment, although not shown, instead of the limiting pad 51, it may be processed so as to increase the friction coefficient of the surface of the push-up plate 14 itself. Various operational effects can be obtained. (The same applies to a second embodiment described later).

FIGS. 5 and 6 show a second embodiment of the automatic document feeder according to the present invention. This embodiment has substantially the same configuration as that of the first embodiment. This corresponds to the invention described in claim 2. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the characteristic portions will be described. In both figures, reference numeral 64 denotes a push-up plate which constitutes a part of the document table 9, and the push-up plate 64 is configured substantially in the same manner as the push-up plate 14 in the first embodiment, and has a rear end 64b on the upstream side in the transport direction. The document P set on the document table 9 is pushed upward by turning around the rotation fulcrum 64a disposed on the side and the leading end 64c side approaching the page roller 10, and the upper surface thereof is moved to the page roller 10 Press

The push-up plate 64 is curved so that a portion between the front end 64c and the rear end 64b has a convex curvature radius R.
The rotation fulcrum 64a is set so that the extension surface in the tangential direction of the tip end 64c approaches the pressure contact portion between the sheet feeding belt 11 and the sheet feeding preventing roller 12 when the tip end 64c is brought close to the call roller 10. That is, the rear end 64b is curved downward with respect to the tip 64c, and the rotation fulcrum 64a is provided at a position close to the calling roller 10 below the extended surface of the tip 64c near the calling roller 10. Have been. With this configuration, even when the length L of the document P in the transport direction is shortened similarly to the above-described first embodiment, the push-up plate 64 is sufficiently separated from the recall roller 10 in a lowered state and has a large amount. The document P has a compact configuration in which the original P can be set.

Also on the push-up plate 64, a restricting pad 51 is adhered between the leading end 64c and the rear end 64b by a double-sided tape.
The position where the upper surface of the document P is pressed in close proximity to the document P, that is, the position facing the call roller 10 that changes depending on the number of documents P (the thickness of the document bundle) is sufficiently covered.
It is provided from 64 c to the rear end 64 b, and suppresses slipping on the push-up plate 64 in a state where the originals P are overlapped at the time of transmission by the call roller 10, thereby restricting the feeding of the originals other than the uppermost original P.

More specifically, when the number of the set documents P is small, the distance between the axis of the recall roller 10 and the tip 64c becomes a short distance x1, as shown in FIG. The original P is pressed against the call roller 10 on the opposing surface of the document P. Therefore, the feeding of a document other than the uppermost original P can be restricted by the restriction pad 51 located on the opposing surface. On the other hand, when the number of the set documents P is large, the distance between the axis of the call roller 10 and the tip 64c becomes a long distance x2 as shown in FIG.
, The original P is pressed against the page roller 10 on the opposing surface on the side of the rear end 64b as compared with the case where the amount is small, so that the feeding out of the original other than the uppermost original P can be restricted by the restriction pad 51 located on the opposing surface. The push-up plate 64 also has a limited pad.
The reference numeral 51 is provided on the entire surface of the document P in the transport direction between the front end 64c and the rear end 64b, so that the document P to be set is not hit.

As described above, also in this embodiment, the tip 64
The push-up plate 64 can be shortened so that a large amount of documents P can be set by bending the portion between the rear end 64b and the rotation support point 64a closer to the recall roller 10 side.
The tip also covers the position facing the call roller 10
Since the limit pad 51 is provided from 64c to the rear end 64b,
It is possible to limit the sending of documents other than the uppermost document P regardless of the set number of sheets. Therefore, similarly to the first embodiment, the size of the apparatus can be reduced while preventing double feeding of the document P.

[0039]

According to the first aspect of the present invention, the push-up member can be bent between the front end and the rear end so that the pivot point can be disposed below the extension surface of the front end. Therefore, even when a large amount of originals can be pressed against the rotating member of the retrieving means by a short push-up member, if the number of set originals is small, the restricting member is located on the opposite surface of the leading end. The feeding of the original can be restricted by the means, and when a large number of originals are set, the feeding of the original can be restricted by the restricting means located at the bent portion between the leading end and the rear end.

According to the second aspect of the present invention, the space between the front end and the rear end of the push-up member is curved in a convex shape. Similarly, the pivoting fulcrum can be disposed below the tangential extension surface of the leading end to shorten the push-up member. Similarly, when the original is fed in a small amount, When the number of set documents is large, it can be limited by the restricting member located on the rear end side.

Therefore, even if the push-up member is small, it is possible to reliably restrict the feeding of documents other than the uppermost document, thereby preventing the double feeding of documents. As a result, even when a large number of documents are placed, despite the compact configuration, the documents can be automatically conveyed while preventing double feeding.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of an automatic document feeder according to the present invention, and is a schematic overall configuration diagram thereof.

FIG. 2 is a side view showing a main part thereof.

FIG. 3 is a side view showing a state of the main part different from FIG. 2;

FIGS. 4A and 4B are diagrams showing the main part, wherein FIG. 4A is a plan view thereof, and FIG. 4B is a side view from a direction different from FIGS.

FIG. 5 is a view showing a second embodiment of the automatic document feeder according to the present invention, and is a side view showing a main part thereof.

FIG. 6 is a side view showing a state different from FIG. 5 of the main part.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 copier (image reading device) 2 slit glass (reading position) 4 exposure lamp 5 first mirror 6 ADF (automatic document feeder) 9 document placing table 10 call roller (caller, rotating member) 11 paper feed belt (separation) Paper feed means) 12 Paper feed prevention rollers (separate paper feed means) 14, 64 Push-up plate (push-up member) 14a, 64a Rotating fulcrum 14b Rear end 14c Tip 14d Bent point 23 First transport roller (transport means) 24 Driven roller (conveying means) 25 Reverse path 28 Reverse guide 29 Reverse discharge guide 30 Discharge path 31 Reflection guide member 32 Second transport roller 33 Followed roller 34 Discharge roller 35 Followed roller 37 Exterior cover 51 Limiting pad (Limiting means) 64b Rear end 64c Front end P Original

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Imoto 1-3-6 Nakamagome, Ota-ku, Tokyo Stock inside Ricoh Company (72) Inventor Takashi Fujii 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Inside Ricoh Company (72) Inventor Seiko Hashizume 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Company Ricoh Company (72) Inventor Hirotaka Shimizu 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Company Ricoh Company ( 72) Inventor Motoya Sano 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Company (72) Inventor Hitoshi Hattori 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Company

Claims (2)

[Claims] An original placing table on which a plurality of originals can be set; a calling means for calling the set originals downstream in a conveying direction; and a feeding means for separating the called originals one by one from an uppermost one. An automatic document feeder mounted on an image reading apparatus, comprising: a separate sheet feeding means for feeding paper; and a conveying means for conveying a fed document to a document reading position on the apparatus main body side. A rotating member that rotates while abutting on the upper surface of the document on the mounting table and feeds the document to the downstream side in the transport direction; A push-up member that pushes up the set original by rotating about the fulcrum and presses the upper surface of the original against the rotating member of the calling means, and bends between the leading end and the rear end of the push-up member. With, at least Automatic document feeder, characterized in that a limiting means for limiting the delivery of the document extends from the opposing surface of the distal end portion of the pressing upper member which faces in proximity to the rotating member of the calling means to the bending portion. An original placing table on which a plurality of originals can be set; a calling means for calling the set originals downstream in the transport direction; and a feeding unit for separating the called originals one by one from an uppermost one. An automatic document feeder mounted on an image reading apparatus, comprising: a separate sheet feeding means for feeding paper; and a conveying means for conveying a fed document to a document reading position on the apparatus main body side. A rotating member that rotates while abutting on the upper surface of the document on the mounting table and feeds the document to the downstream side in the transport direction; A push-up member that pushes up the set original by rotating about the fulcrum and presses the upper surface of the original against the rotating member of the calling unit, and curves between the leading end and the rear end of the push-up member in a convex shape. And push up Automatic document feeder, characterized in that a limiting means for limiting the delivery of the document to at least in close proximity to the rotating member of the call means pressing the upper surface of the set original position of the wood.