JP2008174373A - Automatic document feeder, document reader, and image scanner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic document feeder with a simple, compact constitution capable of automatically unbending the document set in a Z-folded state to feed to a document reading position. <P>SOLUTION: The automatic document feeder 107 of an image scanner is equipped with a pick-up roller 32 for transferring the document 3, a separation part 28 for separating the document 3 transferred by the pick-up roller 32, and a fold line unbending member 81 which is disposed rather on the tail end side in the feeding direction of the document 3 than the pick-up roller 32. The fold line unbending member 81 is equipped with an insertion claw 82 capable of being inserted in the inside of folded part of the Z-folded document 3 and a guide recessed part 83 which is disposed at the upper side of the insertion claw 82 and formed so as to be recessed in the document feeding direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automatic document feeder provided in a document reading device. Specifically, the present invention relates to a configuration of an automatic document feeder that automatically conveys a document set in a Z-folded state.

  In Patent Document 1, for example, a sheet cut into a rectangular shape is expanded horizontally, and then folded back into two at a half position in the longitudinal direction. A document folded outward at a half position in the longitudinal direction of the sheet portion is referred to as a Z-fold document, and it is pointed out that such a Z-fold document may be mixed in a normal document.

Patent Document 1 proposes the following configuration in order to automatically stretch and transport the above Z-folded document. That is, a turn roller and a switching guide are provided, and the switching guide initially guides the leading side of the Z-folded document so as to be conveyed along the turn roller in a curved shape. On the other hand, the switching guide is switched by a solenoid before the folded portion of the Z-folded document enters, and the folded portion of the document is extended by guiding the folded portion to the folding space.
Japanese Patent Laid-Open No. 5-116795

  However, in the configuration of Patent Document 1, it is necessary to install a document conveyance path that is greatly curved in order to extend the fold of the Z-folded document, and there remains room for improvement in terms of downsizing the device. It was. Further, since the original is folded inside the apparatus, the configuration inside the apparatus becomes complicated, and maintenance when the original is jammed inside is difficult.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to an aspect of the present invention, an automatic document feeder having the following configuration is provided. That is, a pickup roller for feeding a document, a separation unit that separates the document fed by the pickup roller, and a crease-stretching member disposed on the trailing side in the document transport direction from the pickup roller. The crease-stretching member includes an insertion claw that can be inserted into a folded portion of a Z-folded document, and a guide recess that is disposed above the insertion claw and is recessed in the document conveyance direction. Prepare.

  As a result, the insertion claw is inserted into the folded portion of the Z-folded document as the document is conveyed, and the folded portion is reversed by guiding the portion above the insertion claw with the guide recess. And can be deployed. Therefore, the Z-folded document can be automatically stretched and supplied to the downstream side with a simple and compact configuration.

  In the automatic document feeder, the guide recess preferably has a curved guide surface.

  Thus, the document guiding action of the guide recess is smoothly performed, so that the Z-folded document can be reliably developed.

  In the automatic document feeder, it is preferable that the guide surface is formed in a circular arc shape.

  Thereby, since the shape of a guide recessed part becomes simple, manufacturing cost can be reduced.

  In the automatic document feeder, the crease-stretching member is configured to be movable between a crease-stretching position where the insertion claw is brought into contact with a document and a retreat position where the insertion claw is separated from the document. Is preferred.

  As a result, by setting the crease-stretching member to the retracted position, the crease-stretching member does not get in the way during maintenance work such as setting or removing a document on the automatic document feeder or removing a jammed document. Can be improved.

  In the automatic document feeder, it is preferable that the separation unit includes a separation roller, and the crease-stretching member is supported so as to be rotatable about an axis of the separation roller.

  Thereby, the simple structure which enables a crease extension member to move between a crease extension position and a retracted position is realizable.

  The automatic document feeder preferably has the following configuration. That is, the pick-up roller is configured to be movable between a feeding position where it comes into contact with the original and a standby position where it is separated from the original. The crease-stretching member moves between the crease-stretching position and the retracted position in conjunction with the movement of the pickup roller between the retraction position and the standby position.

  Thereby, it is possible to rationally link the feeding of the document on the pickup roller and the development of the Z-folded document by the crease-stretching member, and the configuration can be simplified.

  According to another aspect of the present invention, there are provided a document reading device and an image scanner device provided with the automatic document feeder.

  Next, embodiments of the invention will be described. FIG. 1 is a front sectional view showing an image scanner device according to an embodiment of the present invention, FIG. 2 is a perspective view of a main part showing details of a separation unit and a pickup roller of an auto document feeder, and FIG. It is a perspective view explaining.

  As shown in FIG. 1, an image scanner apparatus 101 as an image reading apparatus fixes an original platen 102 on which a platen glass on which a read original is placed is disposed, and presses and fixes the read original on the platen glass. A document table cover 103 and an operation panel (not shown) for instructing the start of document reading and the like are provided.

  The document table cover 103 is provided with an auto document feeder (automatic document feeder) 107. The auto document feeder 107 includes a document tray 11 provided on the upper part of the document table cover 103 and a paper discharge tray 12 provided below the document tray.

  Inside the document table cover 103, a curved document transport path 13 that connects the document tray 11 and the paper discharge tray 12 is formed. Document reading positions P1, P2 are set in the middle of the document transport path 13. With this configuration, the originals 3 set on the original tray 11 are separated one by one and conveyed along the curved original conveying path 13, and after passing through the original reading positions P1 and P2, the paper is discharged. It is discharged to the tray 12.

  A scanner unit (document reading unit) 21 is provided inside the document table 102. The scanner unit 21 includes a light source 22 that emits light to the document reading position P1, reflection mirrors 23, 24, and 25 that reflect reflected light from the document 3, and a condensing lens 26 that converges the reflected light. And a charge coupled device (CCD) 27 for converting the converged light into an electric signal and outputting the electric signal.

  With this configuration, the document 3 transported along the document transport path 13 is scanned at the document reading position P1, and the reflected light from the document 3 is guided to the CCD 27 to form an image. As a result, the CCD 27 can output an electrical signal corresponding to the read content. This signal and a signal of the contact image sensor 67 described later are transmitted via a communication cable to a host device such as a personal computer connected to the image scanner device 101 after appropriate conversion processing.

  Next, a detailed configuration of the document transport path 13 will be described. As shown in FIG. 1, a separation roller 31 and a pickup roller 32 are provided at a location where the document 3 is supplied from the document tray 11 to the document transport path 13. A swing arm 33 is attached so as to be swingable about the axis of the separation roller 31, and a pickup roller 32 is supported on the tip side of the swing arm 33. A configuration for driving the separation roller 31, the pickup roller 32, and the swing arm 33 will be described later.

  A separation pad 34 is installed at a position facing the separation roller 31, and the separation pad 34 is pressed against the peripheral surface of the separation roller 31 by a spring. A separation unit 28 is constituted by the separation roller 31 and the separation pad 34, and the separation roller 31 is driven in a state where the document 3 is nipped between the separation roller 31 and the separation pad 34, whereby one document 3 is obtained. Can be separated one by one.

  A plurality of conveying rollers 61, 62, 63, 64 are provided downstream of the separation roller 31. Thereby, the document 3 conveyed downstream by the driving of the separation roller 31 is further nipped by the conveyance rollers 61, 62, 63 and further conveyed, and passes the document reading position P1. At this time, information on the document 3 is read by the scanner unit 21.

  The document 3 is further transported by driving the transport roller 64 and passes the document reading position P2. The document reading position P2 is provided with a contact image sensor 67, and the content on the back side of the document 3 can be scanned while the document 3 is nipped between the contact image sensor 67 and the platen roller 65. It is like that. The document 3 whose contents on both the front and back sides are read at the two document reading positions P1 and P2 is conveyed by the sheet discharge roller 70 and discharged onto the sheet discharge tray 12.

  Next, a configuration around the separation roller 31 and the pickup roller 32 will be described in detail with reference to a perspective view of a main part in FIG.

  As shown in FIG. 2, a drive shaft 41 is disposed concentrically with the separation roller 31, and a first clutch 51 is interposed between the drive shaft 41 and the separation roller 31. The first clutch 51 is configured as a one-way clutch. When the drive shaft 41 rotates in the direction of the arrow in FIG. 2, it transmits it to the separation roller 31, while when the drive shaft 41 rotates in the opposite direction, When the separation roller 31 rotates at a higher speed than the drive shaft 41 (including when the drive shaft 41 is stopped), the separation roller 31 is automatically cut, and the drive shaft 41 is configured to idle with respect to the separation roller 31. Yes.

  The swing arm 33 has a structure in which a pair of arm bodies 35, 35 arranged so as to sandwich the separation roller 31 are connected by a beam portion 36. The base portion of each arm body 35 is supported by the drive shaft 41, and the roller shaft 42 is supported by the tip portion of the swing arm 33. The pickup roller 32 is rotatably supported on the roller shaft 42. The pickup roller 32 is disposed so as to be sandwiched between the two arm bodies 35 and 35.

  A driving pulley 43 is integrally fixed to the driving shaft 41 at a position on one side of the separation roller 31. On the other hand, a driven pulley 44 is rotatably supported on the roller shaft 42 at a position on one side of the pickup roller 32. An endless transmission belt 45 is stretched between the drive pulley 43 and the driven pulley 44.

  A second clutch 52 is interposed between the driven pulley 44 and the pickup roller 32. Similarly to the first clutch 51, the second clutch 52 is also configured as a one-way clutch. When the driven pulley 44 rotates in the direction of the arrow in FIG. Is rotated in the opposite direction, and when the pickup roller 32 rotates at a higher speed than the driven pulley 44 (including when the driven pulley 44 is stopped), the driven pulley 44 is moved to the pickup roller 32. On the other hand, it is configured to idle.

  A torque limiter 53 is disposed between the driven pulley 44 and the arm body 35 on one side. When the driven pulley 44 rotates in the direction of the arrow in FIG. 2, the torque limiter 53 transmits the torque to the arm body 35 to rotate the swing arm 33 downward, while the torque is reduced to a predetermined value. When the value is exceeded, the driven pulley 44 is configured to idle with respect to the arm body 35.

  With the above configuration, when the drive shaft 41 is rotated in the direction of the arrow in FIG. 2 by the electric motor of the drive unit (not shown), the rotation is transmitted to the separation roller 31 by the first clutch 51 and the separation roller 31 rotates. Further, since the drive pulley 43 rotates integrally with the drive shaft 41, this rotation is transmitted to the driven pulley 44 via the transmission belt 45, and the driven pulley 44 rotates in the direction of the arrow in FIG. The rotation of the driven pulley 44 is transmitted to the pickup roller 32 by the second clutch 52, and the pickup roller 32 rotates. Further, since the rotation of the driven pulley 44 is transmitted to the arm body 35 via the torque limiter 53, the swing arm 33 starts to rotate downward from the position (standby position) indicated by the chain line in FIG.

  The pickup roller 32 descends as the swing arm 33 rotates downward, and comes into contact with the uppermost document 3 among the documents 3 set on the document tray 11 (shown by a solid line in FIG. 1). Feeding position). As a result, the document 3 is fed by the pickup roller 32 and sent to the nip portion between the separation roller 31 and the separation pad 34. Since the swing arm 33 receives a reaction force when the pickup roller 32 comes into contact with the document 3, the torque limiter 53 does not transmit the rotation of the driven pulley 44 to the arm body 35, and the swing arm 33 moves downward. Stops turning.

  The documents 3 are separated one by one at the nip portion between the separation roller 31 and the separation pad 34 and then conveyed downstream to the conveyance roller 61 (FIG. 1). Here, since the peripheral speed of the rotating transport roller 61 is set to be larger than the peripheral speed of the separation roller 31, the separation roller 31 rotates around the document 3 transported by the transport roller 61. The rotation speed of the separation roller 31 exceeds the rotation speed of the drive shaft 41. As a result, the first clutch 51 is disconnected, and the separation roller 31 rotates idly with respect to the drive shaft 41.

  Thereafter, when the document 3 sent by the transport roller 61 passes through the nip portion between the separation roller 31 and the separation pad 34, the separation roller 31 is not rotated along with the document 3, so that the first clutch 51 is connected again. As a result, the separation roller 31 is driven again by the drive shaft 41, and the conveyance of the next document 3 fed by the pickup roller 32 is started.

  Next, when it is detected by a sensor (not shown) that the document 3 has disappeared from the document tray 11, an electric motor of a drive unit (not shown) drives the drive shaft 41 in the direction opposite to the arrow in FIG. Then, the reverse rotation of the drive shaft 41 is transmitted to the driven pulley 44 via the drive pulley 43 and the transmission belt 45, and the reverse rotation of the driven pulley 44 is transmitted to the arm body 35 via the torque limiter 53. As a result, the swing arm 33 rotates upward, and the pickup roller 32 rises to the position of the chain line (standby position) in FIG. Note that when the drive shaft 41 rotates in the reverse direction, the first clutch 51 and the second clutch 52 are disconnected, so that the separation roller 31 and the pickup roller 32 do not rotate in the reverse direction.

  Next, a Z-folded document that can be set on the document tray 11 of the image scanner apparatus 101 of the present embodiment will be described in detail with reference to the perspective view of FIG.

  That is, as shown in FIG. 3, the Z-folded document 3 is folded into two so that the rectangular document is divided into approximately two equal parts in the longitudinal direction, and the folded one side is further divided into approximately two equal parts. It is configured to be folded outward. As a result, the Z-folded document 3 has a bottom portion 4 having a size that is ½ of the original document, and a first folded portion having a size of ¼ that is folded upward from the bottom portion 4 with the first fold 7 as a boundary. Part 5 and a second folded part 6 having a size of 1/4 that is folded upward from the first folded part 5 with the second fold line 8 as a boundary.

  For example, when a Japanese industrial standard A3 size document is Z-folded as shown in FIG. 3, it becomes a half size, that is, an A4 size. For this reason, since it can be stored in the same size as other A4-size originals, it is convenient for filing and can be stored in a compact space. Similarly, when a Japanese industry standard B4 size document is Z-folded, it can be stored in the same size as a B5 size document or the like.

  Next, the configuration of the crease extension member 81 for unfolding and extending the Z-fold original 3 will be described. As shown in FIG. 1 and the like, the crease-stretching member 81 is disposed on the trailing side in the transport direction of the document 3 from the pickup roller 32.

  As shown in FIG. 2, the crease-stretching member 81 is configured in a block shape, and includes an insertion claw 82 formed so as to point toward the end in the document transport direction. Further, the crease-stretching member 81 has a guide recess 83 formed so as to be recessed in the document transport direction above the insertion claw 82. The guide recess 83 includes an arcuate (curved) guide surface 84.

  The crease-stretching member 81 is connected to the tip ends of a pair of rotating arms 85 and 85. The bases of the rotating arms 85 and 85 are rotatably supported on the drive shaft 41, respectively. As a result, the crease-stretching member 81 can move up and down while drawing an arc locus around the axis of the separation roller 31. Further, an urging spring (not shown) is connected to the crease-stretching member 81 to urge the crease-stretching member 81 downward.

  As shown in FIG. 2, the rotating arms 85, 85 are disposed outside the arm bodies 35, 35 that support the pickup roller 32. The one side arm body 35 is provided with a pushing projection 86 in a convex shape, and the pushing projection 86 can push the lower surface of the one side turning arm 85.

  Therefore, when the swing arm 33 is rotated upward to raise the pickup roller 32, the rotation arm 85 is pushed upward by the push projection 86, and the crease extending member 81 is also raised. On the other hand, when the swing arm 33 is rotated downward, the pushing protrusion 86 does not push the turning arm 85, so that the crease extending member 81 is lowered by the biasing force of the biasing spring.

  With this configuration, the operator first sets a plurality of Z-folded originals 3 on the original tray 11 in a stacked manner. At this time, each Z-folded document 3 is placed on the document tray 11 so that the bottom 4 is on the lower side. Then, the operator gives an instruction to start scanning through an operation panel (not shown), whereby the image scanner apparatus 101 starts reading a document.

  FIG. 4A shows the state immediately after the start of the scan. As shown in FIG. 4A, when the scan is started, the pickup roller 32 is moved from the standby position together with the swing arm 33 as described above. The document 3 is lowered to the position, rotated while contacting the leading side of the bottom 4 of the Z-folded document 3, and the document 3 is fed. Further, as the swing arm 33 is rotated downward, the crease-stretching member 81 is also lowered from the retracted position (chain line in FIG. 1) by a biasing spring (not shown), and the leading end of the insertion pawl 82 is moved to the bottom of the document 3. 4 is moved to a position to be brought into contact with the upper surface of 4 (fold extension position).

  Then, the leading portion of the fed document 3 is nipped between the separation roller 31 and the separation pad 34, and the separation roller 31 rotates in this state, whereby the document 3 is separated one by one and directed downstream. Are transported. Thereafter, as shown in FIG. 4B, an insertion claw 82 is inserted into the folded portion of the document 3 (specifically, between the bottom portion 4 and the first folded portion 5), and the first folded portion 5 The second folded portion 6 is scooped up by the insertion claw 82. Then, the second fold line 8 located at the boundary between the first folded part 5 and the second folded part 6 enters the guide recessed part 83 and is received by the guide surface 84.

  When the document 3 is further transported from the state of FIG. 4B by the transport roller 61 (FIG. 1) or the like, as shown in FIG. 4C, the first folded portion in a state of being received by the guide recess 83. It curves so that 5 may become convex upwards, and a clearance gap is formed between the 2nd folding | turning parts 6. FIG. Then, as the document 3 is further conveyed, the degree of bending of the first folding portion 5 increases, and finally the first folding portion 5 is pulled below the insertion claw 82 as shown in FIG. As a result, the first folded portion 5 and the second folded portion 6 (folded portion) are developed. As described above, the Z-folded original 3 can be automatically developed and supplied to the original conveying path 13, and the image can be read with the original 3 stretched.

  As described above, the auto document feeder 107 provided in the image scanner device 101 of the present embodiment includes a pickup roller 32 for feeding the document 3 and a separation unit that separates the document 3 fed by the pickup roller 32. 28, and a crease-stretching member 81 disposed on the end side in the transport direction of the document 3 with respect to the pickup roller 32. The crease-stretching member 81 is disposed inside the folded portion of the Z-folded document 3 as shown in FIG. 4B, and is disposed above the insertion claw 82, and is in the document transport direction. And a guide recess 83 formed to be recessed.

  As a result, the insertion claw 82 is inserted into the folded portion of the Z-folded document 3 in accordance with the conveyance of the document 3, and the portions above the insertion claw 82 (the first folding unit 5 and the second folding unit 6). ) Is received and guided by the guide recess 83, the folded portion can be reversed and expanded as shown in FIG. Therefore, the Z-folded document 3 can be automatically stretched and supplied to the downstream side with a simple and compact configuration. In particular, since the Z-fold original 3 can be extended and developed without particularly driving the crease-stretching member 81, the configuration can be simplified, the manufacturing cost can be reduced, and the maintenance work can be facilitated.

  In the auto document feeder 107 of the present embodiment, the guide recess 83 has an arcuate (curved) guide surface 84.

  As a result, the document guiding action of the guide recess 83 is smoothly performed, so that the Z-folded document 3 can be developed more reliably. Further, since the shape of the guide recess 83 is simplified, the manufacturing cost can be reduced.

  Further, in the auto document feeder 107 of the present embodiment, the crease-stretching member 81 separates the insertion claw 82 from the document 3 and a crease-stretching position (solid line in FIG. 1) where the document 3 is brought into contact with the insertion claw 82. It is configured to move up and down between the retracted position (chain line in FIG. 1).

  As a result, the crease-stretching member 81 is raised to the retracted position, so that the crease-stretching member 81 is in the way during maintenance work such as setting or removing the document 3 on the document tray 11 or removing jammed documents. In addition, workability can be improved.

  In the auto document feeder 107 of the present embodiment, the separation unit 28 includes a separation roller 31, and the crease-stretching member 81 rotates so as to be rotatable around the axis of the separation roller 31. It is supported via arms 85 and 85.

  Thereby, the simple structure which enables the crease extension member 81 to move between a crease extension position and a retracted position is realizable.

  Further, the pickup roller 32 is configured to be movable between a feeding position (solid line in FIG. 1) in contact with the document 3 and a standby position (chain line in FIG. 1) separated from the document 3. Then, the crease extending member 81 is linked to the crease extending position and the retracted position by the pushing protrusion 86 and the biasing spring in conjunction with the movement of the pickup roller 32 between the retracted position and the standby position. Configured to move between.

  Thereby, the retraction of the original 3 by the pickup roller 32 and the development of the Z-fold original 3 by the crease-stretching member 81 can be rationally linked, and the configuration can be simplified.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

  The shape of the guide recess 83 is not limited to the above shape, and can be changed to an appropriate shape such as a V shape. Further, for example, it is conceivable that two convex portions are formed on the crease-stretching member 81 and a relative concave portion formed between the two convex portions is used as a guide concave portion.

  Instead of supporting the crease-stretching member 81 so as to be rotatable about the axis of the separation pad 34, for example, the document table cover 103 is provided with a solenoid, and the movable iron core of the solenoid is connected to the crease-stretching member. Can be changed to a configuration that moves up and down between the crease extending position and the retracted position.

  The configuration in which the crease extending member 81 is interlocked with the vertical movement of the pickup roller 32 is changed to a configuration in which, for example, the crease extending member 81 is directly attached to the swing arm 33 instead of using the pushing protrusion 86. Can do. Further, the crease extending member 81 may be moved up and down by disposing a friction member between the crease extending member 81 and the drive shaft 41.

  The separation unit 28 is not limited to the case where the separation roller 31 and the separation pad 34 are configured. For example, the separation unit 28 can be changed to a configuration in which the separation roller and the retard roller are arranged to face each other. Further, the positions and the number of the transport rollers 61, 62, 63, 64 on the downstream side of the separation unit 28 can be arbitrarily changed according to circumstances.

  The auto document feeder configured as described above can be applied not only to an image reading unit for both an auto document feeder and a flood bed, but also to an image reading unit dedicated to the auto document feeder. The auto document feeder is not limited to an image scanner device, but can be applied to, for example, a copy machine, a facsimile machine, a copy facsimile multifunction machine, and the like.

1 is a front sectional view showing a configuration of an image reading portion of an image scanner device according to an embodiment of the present invention. The main part perspective view which shows the structure of the isolation | separation part of an auto document feeder, and a pick-up roller in detail. The perspective view explaining a Z-fold original. FIG. 4A is an explanatory diagram showing a state immediately after the conveyance of the Z-folded document is started. FIG. 4B is an explanatory view showing a state in which the insertion claw of the crease-stretching member is inserted into the folded portion of the Z-fold document. FIG. 4C is an explanatory diagram showing a state in which the folded portion of the document is bent while being received by the guide recess. FIG. 4D is an explanatory view showing a state in which the folded portion of the original is unfolded and conveyed downstream.

Explanation of symbols

3 Z-fold original 5 First folding part (folding part)
6 Second folding part (folding part)
7 First crease 8 Second crease 28 Separation part 31 Separation roller 32 Pickup roller 81 Folding extension member 82 Insertion claw 83 Guide recess 84 Guide surface 85 Rotating arm 86 Pushing projection 101 Image scanner device 107 Auto document feeder

Claims (8)

A pickup roller for feeding the original,
A separation unit for separating the document fed by the pickup roller;
A crease-stretching member disposed on the trailing side in the document conveying direction from the pickup roller;
With
The crease-stretching member is
An insertion claw that can be inserted into the folded portion of the Z-folded document;
A guide recess disposed above the insertion claw and formed to be concave in the document conveying direction;
An automatic document feeder characterized by comprising: The automatic document feeder according to claim 1,
The automatic document feeder according to claim 1, wherein the guide recess has a curved guide surface. The automatic document feeder according to claim 2,
The automatic document feeder according to claim 1, wherein the guide surface is formed in a circular arc shape. An automatic document feeder according to any one of claims 1 to 3,
The automatic document feeder, wherein the crease-stretching member is configured to be movable between a crease-stretching position where the insertion claw is brought into contact with a document and a retreat position where the insertion claw is separated from the document. The automatic document feeder according to claim 4,
The separation unit includes a separation roller,
The automatic document feeder, wherein the crease-stretching member is rotatably supported around the axis of the separation roller. The automatic document feeder according to claim 4 or 5,
The pickup roller is configured to be movable between a feeding position that contacts the document and a standby position that is separated from the document,
The automatic document feeder, wherein the crease-stretching member moves between the crease-stretching position and a retracted position in conjunction with the movement of the pickup roller between the retraction position and the standby position.   An original reading apparatus comprising the automatic original conveying apparatus according to any one of claims 1 to 6.   An image scanner device as a document reading device according to claim 7.

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