JP2002193494A - Sheet conveyance device and image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet conveyance device and an image reader capable of positively performing a butting operation of a sheet. SOLUTION: A deflection assisting roller 34 is provided assisting deflection forming of a document in association with a retreating action of a pickup roller 7 when butting a tip of the document after separation between a separating mechanism (including a paper feeding belt 9 and a reverse roller 10) positioned downstream in a conveyance direction of the pickup roller 7 and an butting roller 12 for applying skew correction. The deflection assisting roller 34 and the pickup roller 7 are attached on both ends of an arm 33 capable of rotating around a shaft 33a and they are composed so that one of the pickup roller 7 or the deflection assisting roller 34 abuts on the conveyance objective document.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device mounted on an image reading device, an image forming device, and the like.

[0002]

2. Description of the Related Art Conventionally, a sheet-through type sheet conveying apparatus (ADF, etc.) has a table (mounting table) for mounting sheets such as originals, and a pickup roller for calling a sheet bundle stacked on the table. A separation mechanism that separates and transports the sheet called by the pickup roller one by one, and a pair of abutting rollers for abutting a transport-side leading end of the sheet separated by the separation mechanism. The sheet skew is corrected before stopping the registration by abutting the sheet tip against the nip portion of the abutting roller pair to bend the sheet. This is constituted by a feeding member in which the separation mechanism rotates in the sheet conveyance direction, and a separation member rotating in the direction opposite to the sheet conveyance direction, and particularly skew occurs downstream of the separation mechanism in the sheet conveyance path. Because it is easy.

[0003] Related devices of this type include Japanese Patent Application Laid-Open Nos. 6-100207 and 6-100208.
There is an official gazette. In the technique disclosed in Japanese Patent Application Laid-Open No. 6-100207, a skew correction unit that skews a fed sheet against a pair of rollers or the like, and a split loop baffle that presses a loop generated by the skew correction unit includes And a pressing means for applying a pressing force to the divided loop baffle to improve the skew correction capability while shortening the paper path. Also, Japanese Patent Laid-Open No. 6-10
The technology disclosed in Japanese Patent Application Publication No. 0208 includes a selecting unit for selecting one of the divided loop baffles based on a skew direction of a sheet, and a control unit for controlling a pressing force on the selected divided loop baffle. Skew correction can be performed according to the degree of stiffness and the strength of the stiffness of the paper.

[0004]

However, according to the above-mentioned prior art, when the sheet is thicker than a predetermined thickness and has a strong stiffness, it is difficult for the sheet after the separation to be bent.
There is a problem that the roller pair performing the abutting operation slips and it is difficult to perform the skew correction.

In the techniques disclosed in JP-A-6-100207 and JP-A-6-100208, it is necessary to separately provide a means for applying a pressing force to the divided loop baffle, and the configuration becomes complicated. This leads to an increase in cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet conveying apparatus and an image reading apparatus which can solve such a problem and reliably perform a sheet abutting operation.

[0007]

According to the first aspect of the present invention, the sheet can be brought into contact with and separated from a sheet bundle placed on a placing table, and the sheet is taken out while being in contact with the sheet surface and fed to a predetermined position. Feeding means for feeding, and skew correction is performed by abutting the leading end of the sheet fed by the feeding means,
Abutting conveyance means for further conveying the abutted sheet,
When the leading end of the sheet abuts on the abutting and conveying means between the abutting and conveying means and the feeding means, the bending of the sheet is assisted in conjunction with the contact / separation operation of the feeding means. It is characterized by having a bending assisting means.

[0008] By pressing the transport sheet (original or the like) against a dent (deflection space) on the transport path by the deflection assisting means, the deflection is assisted even when a thick paper sheet or the like having a predetermined thickness or more is abutted and corrected. As a result, the collision correction can be performed reliably.

According to a second aspect of the present invention, in the first aspect, the feeding means and the bending assisting means are respectively attached to both ends of an arm rotatable around a support shaft, and the bending assisting means is The present invention is characterized in that the feeding means presses the sheet being abutted in conjunction with separation from the sheet bundle on the mounting table.

[0010] Since the bending assisting operation of the bending assisting means and the operation of the feeding means such as the pickup roller are interlocked, it is possible to suppress an increase in cost due to an increase in the number of parts.

According to a third aspect of the present invention, a sheet is taken out from the sheet bundle by contacting the sheet bundle placed on the mounting table, and a pickup roller separated from the sheet bundle after the sheet is taken out, and the sheet is taken out by the pickup roller. Separating means for separating sheets one by one, a butting roller for performing skew correction by abutting and bending the leading end of the sheet separated by the separating means, and a butting roller and the separating means; When the front end of the sheet abuts against the abutment roller, a bending assisting means is provided for assisting the formation of the bending of the sheet in conjunction with the separation operation of the pickup roller.

For example, when the leading end of the sheet is detected by a sensor near the abutting roller (on the side of the deflection assisting means), the pickup roller is retracted from the sheet bundle. Even when a strong sheet such as the thick paper sheet is abutted and corrected by pressing a document (such as a document) into a dent (bending space) formed on the transport path, the skew correction is performed by abutting operation by assisting the bending. Can be reliably performed.

According to a fourth aspect of the present invention, in the third aspect, the pickup roller and the bending assisting means are
It is characterized in that it is attached to both ends of an arm rotatable around a support shaft, and one of the pickup roller and the bending assist means abuts on a sheet to be conveyed.

By connecting the bending assisting means and the pickup roller with a simple balance-like member, the structure of the bending assisting means can be simplified and the cost increase due to an increase in the number of parts can be suppressed.

According to a fifth aspect of the present invention, in the fourth aspect, the bending auxiliary means includes a bending auxiliary roller rotatably supported at one end of the arm, and the bending auxiliary roller is driven to rotate. It is characterized by having driving means.

By providing the deflection auxiliary means with the deflection auxiliary roller, sufficient skew correction can be performed without giving unnecessary resistance to the sheet being conveyed. Further, by providing a driving unit for driving the bending auxiliary roller,
A sufficient skew correction can be performed by the rotation of the bending assist roller itself.

According to a sixth aspect of the present invention, there is provided an image reading apparatus including the sheet conveying device according to any one of the first to fifth aspects.

As described above, since the sheet abutment operation can be performed reliably, the skew-corrected original can be conveyed to the image reading position.

[0019]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of an image reading apparatus provided with a sheet conveying device (automatic document feeder (ADF)) according to an embodiment of the present invention, and FIG. The main part of the section is shown. FIG. 3 shows a configuration in the vicinity of a pickup roller in the sheet transport device, and FIG. 4 shows a configuration of a separation feeding section in the sheet transport device. 5 and 6 show a configuration of a control unit of the image reading apparatus.

As shown in FIG. 1, an automatic document feeder (A
The DF) 200 is mounted on a main body 300 of a sheet-through type image reading apparatus. This image reading device 300
At the time of image reading, while the sheet (document) is being conveyed at a predetermined speed by the sheet conveying device 200 to the reading section 40 fixed below the reading position 20 of the contact glass 21, the reading section 40 on the main body side performs the first reading. The image is read on the front side (front side).
The reading unit 25 is configured to read an image on the second surface (back surface).

The sheet conveying device 200 includes a document set section A for setting a document bundle 1 to be read, a separation feeding section B for separating and feeding documents one by one from the set document bundle 1, A registration unit C for firstly abutting and aligning the fed original, and pulling out and feeding the aligned original; a turning unit D for inverting the original to be transported and transporting the original surface toward the reading side (downward); A first reading / conveying section E for reading the front side image of the original from below the contact glass 21, a second reading / conveying section F for reading the back side image of the original after the front side reading, and discharging the original whose front and back sides have been read out of the machine. A paper discharge unit G, a stack unit H for stacking and holding originals after reading, and a driving unit for driving these transport operations (the pickup motor 101, the paper feeding motor 102, and the reading motor shown in FIG. 5). Motor 103, the discharge motor 10
4, a bottom plate raising motor 105), a controller 100 for controlling a series of operations, and the like.

Document table 2 including movable document table 3
Is a mounting table on which the original bundle 1 to be read is set, and the user sets the original bundle 1 so that the surface of the original (image surface) faces upward by the user. At this time, the width direction of the document bundle 1 (the direction orthogonal to the transport direction) is positioned by a side guide (not shown). The set state of the document 1 is detected by the set filler 4 and the document set sensor 5 and transmitted to the main body control unit 111 by the interface unit (serial signal line) 107 as shown in FIG. Further, a document length sensor 30 provided on the document table surface,
Based on the detection information of the original 31 (which is constituted by a reflection-type sensor or an actuator-type sensor capable of detecting even one original), the approximate length of the original in the transport direction is determined. For this reason, a sensor arrangement that can determine at least whether the document size is vertical or horizontal is adopted.

The movable original table 3 is configured to be able to move up and down in the directions a and b shown in FIG. 1 by a bottom plate raising motor 105 shown in FIG. 4. When the document is detected by the document set sensor 5, the movable platen 3 is raised by the forward rotation of the bottom plate raising motor 105, and the uppermost surface of the document bundle 1 comes into contact with the pickup roller 7.

As shown in FIG. 3, the pickup roller 7 is operated in the directions c and d shown in FIG. 1 by a cam mechanism (including a lifting cam 41 and a pickup lever 42) by a pickup motor 101. Along with this operation, when the movable document table 3 is raised by the forward rotation of the bottom plate raising motor 105, the pickup roller 7 is pushed up by the upper surface of the document on the movable document table 3 and rises in the direction c.
The upper limit is detected by the table lift sensor 8. Further, the rotation position of the ascending cam 41 is detected by the pickup roller HP sensor 43, and it is possible to detect whether or not the ascending cam 41 is at the home position (retreat position) based on this detection information.

In the movable document table 3, a concave roller clearance is formed at the point of contact with the pickup roller 7, so that the pickup roller 7 does not collide with the movable document table 3. With this configuration, when the number of documents is small during the pressing operation of the pickup roller 7, the drop height of the pickup roller 7 is large, and the cushioning effect of the document 1 between the movable document table 3 and the pickup roller 7 is reduced. This is to improve the loud impact noise of the pickup roller 7.

When the original is set as described above and the pickup roller 7 is in contact with the upper surface of the original and is pushed up to a predetermined position, the start key of the operation unit 108 on the main body is pressed, and Part 1
When a document feed signal is transmitted to the controller 100 through the controller 07, the controller 100 drives the paper feed motor 102 to rotate in the forward direction, and the pickup roller 7 rotates by the forward rotation of the sheet feed motor 102, thereby causing the document table to rotate. In this case, several originals (ideally, one) are picked up.
The rotation direction of the pickup roller 7 is a direction in which the uppermost document is conveyed to the paper feed port.

The operation unit 108 includes a button key group (not shown) such as a ten-key, the start key, and a display such as an LCD. The operation unit 108 operates in various operation modes such as a single-sided / double-sided mode, a mixed mode, and an advance mode. The configuration and the operation start / stop instruction can be performed by a user operation.

The paper feeding belt 9 rotates in the paper feeding direction by the normal rotation of the paper feeding motor 102, and the reverse roller 10 rotates in the direction opposite to the paper feeding direction by the normal rotation of the paper feeding motor 102.
The top document and the document below it are separated, and only the top document is fed. More specifically, the reverse roller 10 is friction-driven via a torque limiter (not shown) having a predetermined torque, and is in contact with the paper feed belt 9 at a predetermined pressure. Here, when the reverse roller 10 is in direct contact with the paper feed belt 9 or in contact with the original via one sheet, the reverse roller 10 rotates in a counterclockwise direction with the rotation of the paper feed belt 9, and the original is 2 or more, paper feed belt 9
And the reverse roller 10, the co-rotating force is set to be lower than the torque of the torque limiter. With such a setting, the feeding belt 9
When two or more documents enter between the reverse roller 10 and the reverse roller 10, the reverse roller 10 rotates clockwise, which is the original driving direction, and acts to push back the excess document, thereby preventing double feeding.

The document separated into one sheet by the action of the paper feed belt 9 and the reverse roller 10 is further conveyed by the paper feed belt 9, and then the abutting sensor 1
The leading end is detected by 1, and further abuts against the stopped pull-out roller 12. The separated document is then fed by a predetermined distance determined from the detection of the abutment sensor 11, and as a result, is pressed against the pull-out roller 12 with a predetermined amount of bending, The feed motor 102 stops, and the driving of the feed belt 9 stops.

When the leading edge of the separated document is detected by the abutment sensor 11, the pickup motor 1
01, the pickup roller 7 is retracted from the upper surface of the original, and the original is conveyed only by the conveying force of the paper feed belt 9, and at the same time, the original is bent by rotating the auxiliary roller 34 about the fulcrum 33a. 35 (a depression formed on the lower transport path).

Here, since the bending auxiliary roller 34 is configured to be rotatable, the contact resistance with the document becomes smaller than that of a plate member or the like, and the bending of the document is formed by pressing the bending auxiliary roller 34. Make it smoother. This bending is prevented by the upper transport guide and is not formed upward, but is formed downward along the depression (bending space 35) of the lower transport path. In particular, when the document 1 is thicker than a predetermined thickness and the so-called stiffness is strong,
This is to assist in forming a bend by the butting operation. The invention is not limited to this embodiment, and a driving unit (a driving motor or the like) for rotating the bending assist roller 34 may be provided. Alternatively, it may be configured to receive drive transmission from a drive shaft of the paper feed belt 9 via a timing belt or the like. While receiving such a bending assist operation at the central portion of the original, the leading end of the original enters the nip portion of the upper and lower rollers constituting the pull-out roller 12, and the leading end of the original is aligned (skew correction).

As shown in FIG. 4, the pickup roller 7 and the bending auxiliary roller 34 are mounted on the same arm 33, and rotate about a fulcrum 33a (the drive shaft of the paper feed belt 9). Therefore, the pickup roller 7 is d
When moving in the direction (downward in FIG. 1) and coming into contact with the original 1, the bending assist roller 34 moves in the direction e (upward in FIG. 1), and does not hinder the advance of the original 1 in the transport direction. Conversely, after the leading end of the document 1 has passed the bending assist roller 34, the bending assist roller 34 moves in the f direction (downward in FIG. 1) to facilitate bending, while the pickup roller 7 moves in the c direction. (Upward in FIG. 1) to prepare for conveyance of the next document.

The pull-out roller 12 has the above-mentioned skew correction function, and conveys the skew-corrected document after separation to the intermediate roller 14. The pull-out roller 12 rotates in the conveyance direction by the reverse rotation of the paper feed motor 102. The pull-out roller 12 and the intermediate roller 14 rotate by the reverse rotation drive of the paper feeding motor 102, but the drive is not transmitted to the pickup roller 7 and the paper feeding belt 9 and does not rotate.

A plurality of document width sensors 13 are arranged side by side in the depth direction of the conveyance path, and detect the size of the document conveyed by the pull-out roller 12 in the width direction (direction orthogonal to the conveyance direction). The length of the document in the transport direction is obtained based on the detection information and the motor drive pulse, which are detected by the abutting sensor 11 at the leading / rear end of the document. For example, it can be easily calculated by multiplying the number of drive pulses of the motor by a preset carry amount per one pulse (a carry distance).

When the original is conveyed from the registration section C to the turn section D by driving the pull-out roller 12 and the intermediate roller 14, the conveyance speed in the registration section C is changed to the conveyance speed in the first reading conveyance section E. By setting faster than
The processing time for sending the document to the reading position 20 is reduced.

In this way, the leading edge of the original is
Is detected, before the leading edge of the original enters the nip portion of the upper and lower rollers constituting the reading entrance roller 16, the deceleration is started to make the original conveying speed the same as the reading conveying speed, and at the same time, the reading motor is started. 103 is rotated forward to rotate the reading entrance roller 16, the reading exit roller 23, and the CIS exit roller 27. Next, when the registration sensor 17 detects the leading edge of the document, the registration sensor 17 decelerates over a predetermined transport distance, temporarily stops just before the reading position 20, and sends a registration stop signal to the main body control unit 111 via the interface unit 107. Send.

Next, when a reading start signal is received from the main body control unit 111, the controller 100 resumes the conveyance of the document whose registration has been stopped, and the predetermined conveyance speed until the leading end of the document reaches the reading position 20. And accelerated to stand up. Next, at the timing when the leading edge of the document detected by the pulse count of the reading motor 103 reaches the reading position 20, the controller 100 notifies the main body control unit 111 of the effective image area of the first surface (front surface) in the sub-scanning direction. The gate signal shown is transmitted. This gate signal is transmitted until the rear end of the document passes the reading position 20 above the first reading unit 40.

Here, in the case of single-sided original reading, the original that has passed through the reading / conveying section E is conveyed to the paper discharge section G via the second reading section 25. At this time, when the leading edge of the document is detected by the paper ejection sensor 24, the paper ejection motor 104 is driven to rotate forward to rotate the paper ejection roller 28 counterclockwise. Further, the detection of the leading edge of the original by the paper discharge sensor 24
Is counted, and the trailing edge of the original is
8, the drive speed of the discharge motor 104 is reduced immediately before the upper and lower rollers are removed from the nip portion.
9 so that the original discharged onto the printer 9 does not jump out of the apparatus.

On the other hand, in the case of double-sided document reading, the leading edge of the document is detected by the paper discharge sensor 24 and then the reading motor 103 is read.
The controller 100 transmits a gate signal indicating the effective image area in the sub-scanning direction to the second reading unit 25 at the timing when the leading edge of the document reaches the second reading unit 25. This gate signal is transmitted until the rear end of the document passes through the second reading unit 25.

As shown in FIG. 6, the contact image sensor constituting the second reading unit 25 reads the image surface of the original by exposing the light source unit 200 for exposure when reading the original, and converts the information into an electric signal (see FIG. 6). A sensor chip (CCD) 201 that photoelectrically converts the analog signal into an analog signal; an amplifier 202 that amplifies the analog signal; an A / D converter (A / D) 203 that converts the amplified analog signal into a digital signal; An image processing unit 204 that generates information;
Frame memory 2 for developing and storing the image information
05, an output control circuit 206 for transmitting the image information stored in the frame memory 205 to the main body control unit 111, and an interface circuit (I / F circuit) 2 with the main body control unit 111
07, etc., are configured to perform exposure processing according to a timing signal from the ADF side, and transmit the acquired image information to the main body side.

Further, the contact image sensor reads the second reading roller 26 serving as a white reference at a predetermined timing (including the start of document reading), and acquires correction data used for shading correction. In the present embodiment, the rotating body (the second reading roller 26) forms the white reference, but is not limited to this, and may be a plate-shaped guide member. As described above, the second reading roller 26
This suppresses the lifting of the document in the reading unit 25 and also serves as a white reference for acquiring shading data in the second reading unit 25.

Next, with reference to FIG. 7, the bending assisting operation in the present embodiment will be described.

First, an original bundle 1 of the same size is set on an original table 2 with its leading end abutting an original stopper (not shown), and the width direction of the original bundle 1 is positioned by the side guide. .

In this state, the set filler 4 is displaced,
Accordingly, the light shielding of the document set sensor 5 is released, and when the setting of the document is detected (s101), a document set signal is transmitted to the main body control unit 111 via the interface unit 107. Further, the movable document table 2 is raised by forward rotation of the bottom plate raising motor 105 (s102), and is detected by the table raising sensor 8 (s103). After the original set signal is transmitted, when a start key or the like is pressed on the operation unit 108, the main unit control unit 111 controls the controller 100 via the interface unit 107.
When a document feed signal is transmitted to the document feeder, a document feed operation is performed.

When a document set is detected as described above,
The document stopper is the CW of the pickup motor 101
The document is retracted to a predetermined lower position by (forward rotation) driving, and the leading end of the document is opened. The driving device for retracting the document stopper is not limited to the stepping motor (the pickup motor 101), but may be, for example, a solenoid.

Then, the pickup roller 7 is moved from the predetermined retracted position to the upper surface of the original document indicated by the solid line position by the reverse rotation of the pickup motor 101, and pressed against the original by a predetermined force (s104). Furthermore, when a predetermined time has elapsed,
The sheet feeding operation and the separating operation are performed (s105).

Here, the sheet feeding motor 102 for driving the separation feeding section B and the registration section C rotates in the CCW (forward rotation) direction, and rotates the pickup roller 7 clockwise to move the uppermost position of the original bundle 1. From the feeding section B.

The aforementioned feed belt 9 and reverse roller 10
The documents separated one by one by the action of (1) are further conveyed by the paper feed belt 9. In this process, when the front end is detected by the abutment sensor 11 (s106), the drive transmission from the feed motor 102 to the pull-out roller 12 is interrupted. The original is further conveyed only by the conveying force of the paper feed belt 9, and the pull-out roller 12 is stopped.
And the nips of the upper and lower rollers. Here, the sheet feeding motor 10
The counting of the drive amount (pulse number) of 2 is started (s10).
7).

The pickup roller 101 is retracted from the upper surface of the original by rotating the pickup motor 101 in the CCW direction by detecting the leading end of the abutment sensor 11, and is attached to the same arm 33 as the pickup roller 7. The bending auxiliary roller 34 is connected to the arm 3
The third pivot point 33a is pivoted (s108). Accordingly, the central portion of the document is pressed against the bending space 35 by the bending assist roller 34, and the leading end of the document enters the nip portion of the pull-out roller 12 to perform alignment (abutment skew correction). Become.

As described above, the original is abutting sensor 1
1 and is conveyed by a predetermined distance (a predetermined number of pulses) by the normal rotation of the paper feed motor 102,
By driving the paper feed motor 102 in the reverse direction in a state where the paper feed belt 102 is pressed with a predetermined amount of bending, the driving of the paper feed belt 23 is stopped (s109).

Thereafter, the pull-out roller 12 is rotated by the forward rotation of the paper feed motor 102, and conveys the document in the direction of the turn portion D. The bending assist roller 34 is moved to the d-direction by the drive of the pickup motor 101 to call the next original, and the fulcrum 33 is moved.
It rises in the direction e around the center a (s110).

The document table 2 and the like constitute the mounting table described above, the separation and feeding section B and the like constitute the feeding means, the abutting sensor 11, the pull-out roller 12 and the like.
And the like constitute the abutting and conveying means, the deflection auxiliary rollers 34 and the like constitute the deflection auxiliary means, the paper feeding belt 9, the reverse roller 10 and the like constitute the separation means,
The pull-out roller 12 and the like constitute the abutting roller.

[0053]

According to the first aspect of the present invention, a cardboard sheet or the like having a predetermined thickness or more is pressed by pressing the conveying sheet to a predetermined position (concave bending space) on the conveying path by the bending assisting means. Even when abutting correction is performed, it is possible to reliably perform the abutting correction by assisting the bending.

According to the second aspect of the present invention, since the bending assisting operation of the bending assisting means and the operation of the feeding means such as the pickup roller are interlocked, the cost increases due to an increase in the number of parts. Can be suppressed.

According to the third aspect of the present invention, since the flexure assisting means can form an appropriate flexure even with a rigid original such as thick paper, skew correction can be performed reliably. Further, since the deflection assisting unit operates in conjunction with the pickup roller, it is possible to prevent an increase in the number of components and an increase in cost.

According to the fourth aspect of the present invention, since the bending auxiliary roller and the pickup roller are linked by a simple balance-shaped member, it is possible to prevent an increase in the number of parts and an increase in cost.

According to the fifth aspect of the present invention, since the deflection correcting means is a roller, the frictional resistance with the document is small,
The deflection can be formed more smoothly, and the skew can be corrected. In addition, since the deflection correction roller has the driving means, the deflection can be formed more strongly, and the skew can be surely corrected.

According to the sixth aspect of the present invention, since the sheet abutment operation can be reliably performed as described above, the skew-corrected original is transported to the reading position, and the image of the original is read. be able to.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of an image reading device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a main configuration of a separation feeding unit and a resist unit according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration near a pickup roller according to the embodiment of the present invention.

FIG. 4 is a perspective view illustrating a configuration of a separation feeding unit according to the embodiment of the present invention.

FIG. 5 is a block diagram illustrating a configuration of a control unit of the image reading apparatus according to the embodiment of the present invention.

FIG. 6 is a block diagram illustrating a configuration of a second reading unit according to the embodiment of the present invention.

FIG. 7 is a flowchart illustrating a deflection assisting operation of the image reading apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 document (bundle of documents) 2 document table 3 movable document table 4 set filler 5 document set sensor 6 bottom plate home position sensor 7 pickup roller 8 table elevation sensor 9 paper feed belt 10 reverse roller 11 butting sensor 12 pull-out roller 13 document width sensor Reference Signs List 14 Intermediate roller 15 Reading entrance sensor 16 Reading entrance roller 17 Registration sensor 18 Original scale 19 Reading / conveying roller 20 Reading position 21 Contact glass 22 Original scale 23 Reading exit roller 24 Discharge sensor 25 Second reading unit 26 Second reading roller 27 Intermediate Roller 28 paper discharge roller 29 paper discharge tray 30, 31 document length sensor 32 white guide plate 33 arm 33a fulcrum 34 bending auxiliary roller 35 bending space 40 reading unit 41 ascending cam 42 pick Ppureba 43 pick-up roller HP sensor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H076 AA58 BA17 BA24 BA41 BA48 BA63 BA95 3F101 FB17 FE01 LA01 LB02 3F102 AA01 AB01 BA02 BB02 DA08 EA03 FA01 FA08 3F343 FA03 FB01 FC15 GA01 GB01 GC01 GD01 JA01 KA04 KA12 KB KB

Claims (6)

[Claims] A feeding means which is capable of coming into contact with and separating from a sheet bundle placed on a mounting table, taking out the sheet while contacting the sheet surface, and feeding the sheet to a predetermined position; A skew correction is performed by abutting the leading edge of the fed sheet, and the abutting transport means for further transporting the abutted sheet, and the leading edge of the sheet between the abutting transport means and the feeding means. And a bending assisting means for assisting the sheet to bend in conjunction with the contact / separation operation of the feeding means when the sheet is abutted against the abutting and conveying means. 2. The sheet feeding means and the bending assisting means are respectively attached to both ends of an arm rotatable around a support shaft, and the bending assisting means is provided such that the feeding means is a sheet on a mounting table. 2. The sheet conveying apparatus according to claim 1, wherein the sheet being abutted is pressed in conjunction with the separation from the bundle. 3. A pickup roller which comes into contact with a sheet bundle placed on a mounting table to take out a sheet from the sheet bundle, separates the pickup roller separated from the sheet bundle after the sheet is taken out, and separates the sheets taken out by the pickup roller one by one. A separating unit, a butting roller for performing skew correction by abutting and bending the leading end of the sheet separated by the separating unit, and a sheet of the sheet between the abutting roller and the separating unit. A sheet conveying device, comprising: a bending assisting means for assisting the sheet in forming a bend in conjunction with a separation operation of the pickup roller when the leading end abuts on the abutting roller. 4. The pick-up roller and the deflection assisting means are attached to both ends of an arm rotatable around a support shaft, and one of the pickup roller and the deflection assisting means is applied to a sheet to be conveyed. The sheet conveying device according to claim 3, wherein the sheet conveying device is in contact with the sheet conveying device. 5. The bending assisting means includes a bending assisting roller rotatably supported at one end of the arm, and a driving means for rotating and driving the bending assisting roller. Item 5. The sheet conveying device according to item 4. 6. An image reading apparatus comprising the sheet conveying device according to claim 1.