JPH1035954A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To feed a reading conveyor passage surely with a document which is hard to be conveyed by a turnover conveyor passage, and to convey the document normally in this reading conveyor passage as well. SOLUTION: A document D is inserted into a connecting conveyor passage 22 along the top of a loading plane 21b and a tip of this document D is made contact with a nip part of a conveyor roller pair 24, whereby a loading operation of the document D to a manual document loading tray 21 is all over. The conveyor roller pair 24 conveys the document D contacted with the nip part at once along the connecting conveyor passage 22. A control part (unillustrated) rocks a guide plate 27 downward synchronously with the input of a detection signal from a resist sensor 26 and, after the input of the detection signal from the resist sensor 26, a resist roller pair 25 is rotated after the elapse of specified time since the tip of the document D being conveyed by the conveyor roller pair 24 has contacted with the nip part of the resist roller pair.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus which is applied to a facsimile machine, a copying machine, etc. and reads an image formed on a document.

[0002]

2. Description of the Related Art FIG. 4 is a schematic view of a conventional image reading apparatus, in which reference numeral 1 denotes an original bundle loading tray on which a bundle of originals D is loaded, and reference numeral 2 denotes an original loaded on an original bundle loading tray 1. D
Pickup rollers, 3 and 4, which are in contact with the bundle of rollers, are a feed roller and a reverse roller.
The rollers 3 and 4 separate only the uppermost original D from the bundle of originals D loaded on the original stacking tray 1.
And a separation sheet feeding means for feeding the sheet to the reverse conveyance path 6. Reference numeral 5 denotes a pair of transport rollers serving as a reversing unit transport unit that transports the document D fed to the reverse transport path 6 curved in a U-shape along the reverse transport path 6. The transport roller pair is a reading unit transport unit that is disposed and transports the document D sent from the reverse transport path 6 by the transport roller pair 5 to the reading transport path 8.

[0003] Reference numeral 9 denotes a contact type image sensor unit which is disposed on a pair of guide plates 8a and 8b constituting the reading and conveying path 8 and is a reading means in which the contact glass 9a faces the reading and conveying path 8; It has a 1: 1 optical system, a CCD line sensor, etc. (not shown). 10 is the reading conveyance path 8
Reference numeral 11 denotes a pair of conveying rollers serving as a reading unit conveying unit disposed at an exit of the sheet feeding roller pair. The pair of conveying rollers 11 discharges the document D sent from the reading conveying path 8 by the pair of conveying rollers 10 to the outside of the apparatus. In FIG. 4, a pair of transport rollers 10 at the exit of the reading transport path 8 is shown.
A paper discharge roller pair 11 is provided downstream of the paper discharge roller pair 11.
Shows an image reading apparatus for discharging the document D to the outside of the apparatus, but the apparatus can be laid out so that the document D is directly discharged to the outside by the transport roller pair 10.

Next, an operation of reading an image of the original D by the image reading apparatus having the above configuration will be described. The pick-up roller 2 rotates in a state in which the pickup roller 2 is pressed against the bundle of originals D loaded on the original bundle loading tray 1, thereby transferring the uppermost original D or two or more originals D including the uppermost original from the original bundle. Extrude in the transport direction. The document D extruded by the pickup roller 2 is fed to a feed roller 3 and a reverse roller 4.
Into the nip. At this time, when there is only one document D, the document D is sent out into the reversing conveyance path 6 by the feed roller 3 which starts rotating in synchronization with the pickup roller 2 and the reverse roller 4 which is driven to rotate. When there are two or more originals D, the originals D except for the uppermost part are loaded by a reverse roller 4 to which a rotational force in a direction opposite to that of the feed roller 3 is transmitted via a torque limiter (not shown). The document is returned to the tray 1, and only the uppermost document D is sent out into the reverse conveyance path 6. The document D is conveyed along the U-shaped reverse conveyance path 6 by the conveyance roller pair 5, so that the document D is sent out to the reading conveyance path 8 with the upper and lower surfaces of the document bundle loading tray 1 being inverted.

The original D sent out into the reading conveyance path 8 is
The sheet is nipped by one or both of the conveying roller pair 7 and the conveying roller pair 10, and is conveyed by the conveying roller pairs 7 and 10 so as to move in the reading conveying path 8 at a predetermined reading speed. At this time, when the apparatus is set in advance to read an image formed on one surface of the original D, one contact image sensor unit 9 scans the original D, and
When the apparatus is set to read images formed on both sides of the document D, the document D passes through the reading conveyance path 8 by the pair of upper and lower contact image sensor units 9 scanning the document D, respectively. An image on one side or both sides formed on the original D is read. The document D sent from the reading conveyance path 8 by the conveyance roller pair 10 is
The paper is ejected outside the apparatus by 11.

On the other hand, if the document D fed to the reverse transport path 6 is detected by a document sensor (not shown) to have reached a predetermined position, the next document D is output from the document bundle loading tray 1. The originals are separated / fed by the pickup roller 2 and the rollers 3 and 4 and thereafter all the originals D in the original bundle
Is read out to the reverse conveyance path 6, the above-described reading operation for the document D is repeated.

[0007]

In the image reading apparatus as shown in FIG. 4, the document bundle loading tray 1 and the reading conveyance path 8 are connected by a U-shaped reverse conveyance path 6, so that
This enables a layout in which the original bundle loading tray 1 and the reading conveyance path 8 are vertically stacked. By adopting such a layout, the document bundle loading tray 1 which requires a projection area slightly larger than the document D with respect to the installation surface of the apparatus is arranged on the upper portion of the apparatus main body, so that
The advantage that the installation area for installing the device can be reduced can be obtained.

However, even if the original bundle loading tray 1 is placed on top of the apparatus main body, unless the curvature radius of the reverse conveying path 6 is made small, the space for accommodating the reverse conveying path 6 in the apparatus main body. Becomes larger,
The advantage that the installation area for installing the device can be reduced cannot be sufficiently exhibited. On the other hand, by reducing the radius of curvature of the reverse transport path 6, the document D transported in the reverse transport path 6 is also restrained to have a small radius of curvature corresponding to the reverse transport path 6. Accordingly, the radius of curvature of the reversing conveyance path 6 becomes smaller, and the original D exerts a large repulsive force on the reversing conveyance path 6 or the pair of conveying rollers 5 and 7 in the bending direction. Or
In the case of paper having a strong stiffness, the repulsive force acting on the reversing conveyance path 6 or the pair of conveyance rollers 5 and 7 increases, so that the pair of conveyance rollers 5 and 7 holding the document D slip and turn. The image formed on the document D is not normally conveyed on the conveyance path 6 or the reading conveyance path 8, or the document D is not curved along the reverse conveyance path 6 and a jam occurs. It becomes difficult to reliably read.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by reliably feeding a document which is difficult to be conveyed by a reversing conveyance path to a reading conveyance path, and by allowing the document to be conveyed in the reading conveyance path. An object of the present invention is to provide an image reading device that is normally conveyed.

[0010]

In order to achieve the above object, an image reading apparatus according to a first aspect of the present invention is configured such that an original bundle comprising one or more originals is loaded. And a separation unit that separates and feeds only one document from the document bundle loaded in the document bundle loading unit; and that the document fed by the separation paper feeding unit is curved in a U-shape. A reversing unit conveying unit that conveys a document along the reversing conveyance path; and a reading unit that conveys a document sent from the reversing conveyance path by the reversing unit conveyance unit along a reading conveyance path on which a reading unit that reads a document image is arranged. An image reading apparatus provided with a manual feeding unit for manually reading an image for reading an image, and transferring the original loaded in the manual feeding unit from the manual feeding unit to the reading and conveying unit. Connected to the road A loading section transporting means for transporting the original along the continuous transport path, and correcting the inclination of the original transported by the manual paper transporting means with respect to the transport direction of the original by contacting the leading end of the original, and then reading the read transport from the connection transport path. Register means for enabling the original to be fed to the road.

Further, the image reading apparatus according to claim 2 is
The loading unit transport unit includes a transport roller that transports a document loaded in the manual document loading unit, and sets the registration unit to a non-rotating state when loading the document into the manual document loading unit. The loading section transport roller in the non-rotating state is configured to correct the inclination with respect to the transport direction of the document by bringing its nip portion into contact with the leading end of the document loaded in the manual document loading section.

Further, the image reading apparatus according to claim 3 is
The loading unit transport unit includes a transport roller that transports the original loaded in the manual document loading unit, and the registration unit is disposed on the downstream side in the transport direction of the transport roller to transfer the original transported by the transport roller. A registration roller configured to correct the inclination of the original with respect to the conveyance direction by contacting the nip portion with the leading end portion, and the conveyance roller and the registration roller are connected to a connection conveyance path that connects the manual document loading section and the reading conveyance path. A loop accommodating means is provided for expanding a space in the connection conveyance path along a document curved between the rollers.

Further, the image reading apparatus according to claim 4 is
The loop storage means includes a guide plate that constitutes a part of the connection transport path and is swingably supported, and swings the guide plate outward to expand a space in the connection transport path. Features.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram schematically showing a first embodiment of an image reading apparatus according to the present invention, and FIG. 2 is a plan view and a side view showing main parts of the image reading apparatus according to the first embodiment of the present invention. The members corresponding to the members described based on are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 21 denotes a manual document loading tray connected to the apparatus main body, which is swingably supported around a swing shaft 21a from a storage position indicated by a solid line to a paper feeding position indicated by a two-dot chain line. By swinging the manual document loading tray 21 to a paper feed position protruding laterally from the apparatus main body, the document D can be placed on the loading surface 21b facing upward, and the loading surface 21b Is swung to the storage position close to the apparatus main body, so that an increase in the projected area at the place where the apparatus main body is installed can be reduced.

Reference numeral 22 denotes a connection conveyance path connecting the manual document loading tray 21 and the reading conveyance path 8, reference numeral 23 denotes a document sensor which is disposed in the connection conveyance path 22 and detects a document D, and reference numeral 24 denotes loading on the manual document loading tray 21. A pair of transport rollers 25 serving as a loading unit transport means for nipping and transporting the original D loaded at the position is a pair of registration rollers arranged at the entrance of the reading transport path 8. The driving force is transmitted through a clutch mechanism (not shown). 26 is a pair of registration rollers in the conveying direction of the original D.
A registration sensor for detecting the original D at a position immediately before 25, 27
Is a guide plate which constitutes a part of the connection conveyance path 22, and this guide plate 27 is swingably supported at one end on the upstream side. Reference numeral 28 denotes an electromagnetic solenoid in which a rod 28a is connected to a guide plate 27.In an off state, the rod 28a is extended to hold the guide plate 27 in a horizontal position shown by a solid line, and in an on state, the rod 28a is contracted to guide the plate 28a. 27 is held in the extended position indicated by the two-dot chain line. Here, when the guide plate 27 is held at the horizontal position, the entire connection conveyance path 22 has a substantially constant width in the thickness direction of the document D, and when the guide plate 27 is held at the extended position, the conveyance is completed. The width of the connection conveyance path 22 is expanded between the roller pair 24 and the registration roller pair 25, and the space in the connection conveyance path 22 is expanded in the thickness direction of the document D.

Next, an operation of reading an image of the original D by the image reading apparatus having the above configuration will be described. The operation for reading the image of the document D loaded on the document bundle loading tray 1 is the same as that of the conventional image reading apparatus described with reference to FIG. In this case, a clutch mechanism (not shown) that transmits the driving force to the registration roller pair 25 or shuts off the transmission of the driving force is
It is controlled to be always on. As a result, the registration roller pair 25 rotates continuously from the start of reading of the document D on the document bundle loading tray 1 to the completion of discharge of the document D in synchronization with the other roller pairs 5, 10, and 11. I do.

Next, the operation when the original D is loaded into the manual original loading tray 21 and an image formed on the original D is read will be described. The user usually determines that the document D is thick paper, determines that the document D has a strong paper quality, or determines whether the document D is
If it is determined that the originals are too long to be loaded into the original, the originals D are loaded one by one into the manual original loading tray 21. When loading the document D into the manual document loading tray 21, after opening the manual document loading tray 21 to the paper feeding position, the document D is placed on the loading surface 21b, and the document D is connected along the loading surface 21b. It is inserted into the transport path 22. When the document D is inserted into the connection conveyance path 22, the document sensor 23 detects the leading end of the document D at a position before the conveyance roller pair 24.
The detection signal from the document sensor 23 is output to a control unit (not shown), and the control unit starts rotating the transport roller pair 24 in synchronization with the input of the detection signal from the document sensor 23. At this time, the control unit controls the clutch mechanism to the off state to stop the registration roller pair 25.

The original D is inserted deeper into the connection conveying path 22 and the leading end of the original D is brought into contact with the nip portion of the pair of conveying rollers 24 so that the original D
Is completed. When the loading of the document D is completed, the transport roller pair 24 that is already rotating immediately transports the document D, which has abutted the nip portion, along the connection transport path 22. When the document D is sent out from the nip portion of the transport roller pair 24, the registration sensor 26 detects the leading end of the document D at a position immediately before the registration roller pair 25.

The detection signal from the registration sensor 26 is output to the control unit, and the control unit turns on the electromagnetic solenoid 28 in synchronization with the input of the detection signal from the registration sensor 26 to move the guide plate 27 to the extended position. After the detection signal is input from the registration sensor 26, the clutch mechanism is turned on at a timing when a preset time has elapsed.
The set time for turning on the clutch mechanism is set at a timing when a predetermined time has elapsed after the leading end of the document D being conveyed by the conveyance roller pair 24 abuts the nip portion of the registration roller pair 25. 25 is the time set to rotate. By contacting the leading end of the document D with the nip portion of the registration roller pair 25, the inclination (skew) of the document D with respect to the transport direction is corrected by the registration roller pair 25, and the transport roller pair 24 in the connection transport path 22 is corrected. The document D is curved and forms a loop between the pair of registration rollers 25.

The loop of the document D formed in the connection conveyance path 22 is curved downward as shown by a two-dot chain line in FIG. 2B, and at this time, the guide plate 27 is open to the extended position. In this way, the connection conveyance path along the loop of the document D
The space inside 22 has been expanded. For this reason, an excessive force does not act on the document D, so that it is possible to prevent the document D from being jammed or creased by the loop formed in the connection conveyance path 22. FIG. 2 (a)
When each width of each of the roller portion in contact with the document D in the transport roller pair 24 and the registration roller pair 25 and L ₁ and L ₂ as shown in, the roller of the conveying roller pair 24 having only the function of clamping conveying the original D The width L ₁ is generally 6
Is a sufficient degree 0 mm, the roller width L ₂ of the registration roller pair 25 has a function to correct the skew of the document D by adding the original D on the ability to pinching transport each substantially equally at both ends of the document D tip It is set to about 300mm to apply a strong force. The roller portion of the registration roller pair 25 has a three-part structure in which only the center portion and both end portions of the leading edge of the document D are in contact with each other, if it is possible to apply substantially equal force to both end portions of the leading edge of the document D. It may be something.

When the skew of the document D is corrected by lowering the linear velocity of the pair of registration rollers 25 from the linear velocity of the pair of transport rollers 24 by a set speed, the pair of registration rollers 25 Since it is sufficient to rotate / stop synchronously, a clutch mechanism for transmitting or interrupting the driving force to the registration roller pair 25, or an independent drive motor for rotating / stopping only the registration roller pair 25 Can be omitted. In this case, as the transport time of the document D by the registration roller pair 25 and the transport roller pair 24 increases, the loop of the document D in the connection transport path 22 gradually increases, but the paper length of the document D from which an image is read is increased. Assuming that the length is long enough and the length and the swing angle of the guide plate 27 are set so that a loop generated when the original D having the paper length is read can be stored, even in this case,
It is possible to prevent the document D from being jammed or creased by the loop formed in the inside 22. Also,
It is also possible to perform control such that the swing angle of the guide plate 27 increases as the transport time of the document D by the registration roller pair 25 and the transport roller pair 24 increases.

The original D sent from the connection conveyance path 22 into the reading conveyance path 8 is transferred to the registration roller pair 25 or the conveyance roller pair 25.
The sheet is conveyed by a pair of rollers 10 and 25 so as to move in the reading conveyance path 8 at a predetermined reading speed. At this time, if it is set in advance to read an image formed on one side of the original D, one contact type image sensor unit 9 scans the original D, and is formed on both sides of the original D. When the original D is scanned, the pair of upper and lower contact type image sensor units 9 scan the original D, and the original D is formed on the original D while passing through the reading conveyance path 8. The image on one side or both sides is read. The document D sent from the reading conveyance path 8 by the conveyance roller pair 10 is discharged to the outside of the apparatus by the discharge roller pair 11.

On the other hand, after a predetermined time has passed since the registration sensor 26 was turned off and the trailing end of the document D has been sent out from the registration roller pair 25, the control unit turns off the clutch mechanism and turns off the registration roller pair 25. The rotation is stopped, and a drive motor (not shown) for driving the roller pairs 10, 11, and 24 is stopped after the document D is discharged outside the apparatus by the discharge roller pair 11.

As described above, according to the image reading apparatus of the present embodiment, the manual document loading tray 21 in which the documents D for reading the image are manually loaded one by one.
The original loaded in the manual original loading tray 21 is
A pair of transport rollers 24 transported from a manual document loading tray 21 along a connection transport path 22 connected to the reading transport path 8, and the leading edge of the document D transported by the transport roller pair 24 contacts the original D and After the skew is corrected, a pair of registration rollers 25 for feeding the document D from the connection conveyance path 22 to the reading conveyance path 8 is provided.
It is possible to linearly configure the transport path of the original D composed of the original transport path 21b, the connection transport path 22, and the reading transport path 8, and the original D
Is loaded into the manual document loading tray 21, the reverse transport path 6
Thick or stiff originals D that are difficult to be transported along the paper, or long originals D that cannot be loaded in the original bundle loading tray 1 are reliably fed into the reading transport path 8 and The document D can be accurately conveyed at the reading speed, so that the image of the document D can be reliably read by the contact type image sensor unit 9 in the reading and conveying path 8, and the leading end of the document D After the skew of the document D is corrected by contacting the nip portion of the roller pair 25,
Since the document D is sent out from the connection conveyance path 22 to the reading conveyance path 8, it is possible to prevent the image from being read while the document D is skewed. As a result, for example, the reproduction by the image information from the contact image sensor unit 9 is performed. It is possible to prevent an image from being recorded on a recording sheet or the like in an inclined state.

FIG. 3 is a block diagram schematically showing a second embodiment of the image reading apparatus according to the present invention.
The members corresponding to the members described based on are denoted by the same reference numerals, and description thereof will be omitted. Numeral 31 denotes a pair of conveying rollers, which is a loading section conveying means for nipping and conveying the original D loaded at the loading position with respect to the manual original loading tray 21. The pair of conveying rollers 31 is connected via a clutch mechanism (not shown). Thus, the driving force is transmitted.

Next, an operation of reading an image of the original D by the image reading apparatus having the above configuration will be described. The operation of reading an image formed on the original D loaded on the original bundle loading tray 1 is the same as that of the conventional image reading apparatus described with reference to FIG. 4, and a description thereof will be omitted.

Next, the operation when the original D is loaded on the manual original loading tray 21 and the image formed on the original D is read will be described. The user usually determines that the document D is thick paper, determines that the document D has a strong paper quality, or determines whether the document D is
If it is determined that the originals are too long to be loaded into the original, the originals D are loaded one by one into the manual original loading tray 21. When loading the document D into the manual document loading tray 21, after opening the manual document loading tray 21 to the paper feeding position, the document D is placed on the loading surface 21b, and the document D is connected along the loading surface 21b. It is inserted into the transport path 22. When the document D is inserted into the connection conveyance path 22, the document sensor 23 detects the leading end of the document D at a position before the conveyance roller pair 31.
The detection signal from the document sensor 23 is output to a control unit (not shown). The control unit controls the clutch mechanism to be in the ON state and starts the rotation of the transport roller pair 31 after a preset time has elapsed from the input of the detection signal from the document sensor 23.

The user inserts the document D deeper into the connection conveyance path 22 and detects the end of the document D by the conveyance roller between the time when the document sensor 23 detects the document D and the time when the conveyance roller pair 31 starts rotating. The original D is loaded by contacting the nip portion of the pair 31. By bringing the leading end of the document D into contact with the nip portion of the pair of transport rollers 31, the inclination (skew) of the document D with respect to the transport direction is corrected by the pair of transport rollers 31. In this case, the width of the roller portion in contact with the document D is set to about 300 mm so that the transport roller pair 31 applies substantially uniform forces to both ends of the leading end of the document D.

The transport roller pair 31 starts rotating after the original D is loaded at the loading position, and transports the original D along the connection transport path 22. The document D fed from the connection conveyance path 22 to the reading conveyance path is nipped by one or both of the conveyance roller pair 7 and the conveyance roller pair 10, and is read at a predetermined reading speed by the conveyance roller pairs 7 and 10. It is transported to move inside. At this time, if the apparatus is set in advance to read an image formed on one surface of the document D, one contact image sensor unit 9 scans the document D, When the apparatus is set to read the formed image, the pair of upper and lower contact image sensor units 9 scans the original D, and the original D is scanned while passing through the reading conveyance path 8. D
Is read on one side or both sides. The document D sent from the reading conveyance path 8 by the conveyance roller pair 10 is discharged to the outside of the apparatus by the discharge roller pair 11.

On the other hand, if the document sensor 23 is turned off, the control unit turns off the clutch mechanism to stop the rotation of the pair of conveying rollers 31, and the document D is discharged outside the apparatus by the pair of discharge rollers 11. After that, the drive motor (not shown) for driving the roller pairs 7, 10, 11 is stopped.

As described above, according to the image reading apparatus of the present embodiment, the transport roller pair 31 is set to the non-rotating state when the original D is loaded on the manual original loading tray 21, and the transport roller pair 31 is The skew of the original D is corrected by bringing the leading end of the original D loaded on the manual insertion tray 21 into contact with the nip portion, so that the skew of the original D is corrected by the pair of transport rollers 31. Is the connecting transport path
Since the document D is sent out to the reading conveyance path 8, the image can be prevented from being read while the document D is skewed. As a result, for example, the contact type image sensor unit 9
It is possible to prevent a reproduced image based on image information from being recorded on a recording sheet or the like in an inclined state, and to omit the registration roller pair 25 and the registration sensor 26 as compared with the image reading apparatus of the first embodiment. Therefore, the manufacturing cost of the device can be reduced.

[0032]

As described above, according to the image reading apparatus of the first aspect, a manual document loading section in which a document for reading an image is manually loaded, and the manual document loading section is loaded in the manual document loading section. A loading section transport unit that transports the original from a manual original loading unit along a connection transport path that is connected to the reading transport path; and an abutting end of the original that is transported by the manual original transport unit; After the inclination is corrected, registration means is provided for enabling the document to be fed from the connection conveyance path to the reading conveyance path, thereby comprising a loading surface of the manual document loading section, the connection conveyance path, and the reading conveyance path. It is possible to configure the document transport path linearly, and if the document is loaded in the manual document loading unit, it is difficult to transport the document along the U-shaped reverse transport path, and the document is thick or stiff. And The document bundle loading unit can reliably feed a long document that cannot be loaded to the reading transport path and accurately transport the document at a predetermined reading speed. Then, the original can be read normally by the reading means, and after the skew of the original is corrected by contacting the leading end of the original with the registration means, the original is sent out from the connection transport path to the reading transport path. The image can be prevented from being read in a skewed state, and as a result, for example, a reproduced image based on image information from the reading unit can be prevented from being recorded on a recording paper or the like in an inclined state.

Further, according to the image reading apparatus of the second aspect, the loading section transport means includes a transport roller for transporting the original loaded in the manual insertion section, and the transport roller is provided to the manual insertion section. When the document is loaded, the registration unit is configured to be in a non-rotating state, and the transport roller in a non-rotating state causes a nip portion thereof to abut on a leading end portion of the document loaded in the manual document loading section to transport the document. Is corrected, it is not necessary to separately provide a registration roller for correcting the skew of the document, so that the manufacturing cost of the apparatus can be reduced.

Further, according to the image reading apparatus of the third aspect, the loading section transport means includes a transport roller for transporting the original loaded in the manual original loading section, and the registration means includes:
A manual feeder loading section, which is arranged downstream of the manual feed roller in the conveying direction, and is configured by a registration roller that abuts a nip portion on the leading end of the document conveyed by the manual feed roller to correct the inclination of the document with respect to the conveying direction; By providing a loop storage unit that expands the space in the connection conveyance path along a document curved between the manual conveyance roller and the registration roller in the connection conveyance path that connects the reading conveyance path and the reading conveyance path,
Even if the leading edge of the document abuts the nip portion of the registration roller and the document is curved between the conveyance roller and the registration roller in the connection conveyance path, at this time, the loop accommodating means moves the connection conveyance path along the curve of the document. , The document is not subjected to excessive force, and it is possible to prevent the document from being jammed or creased by the loop formed by bending the document in the connection conveyance path. .

Further, according to the image reading apparatus of the present invention, the loop storage means includes a guide plate which constitutes a part of the connection conveyance path and is swingably supported, and swings the guide plate outward. By extending the space in the connection conveyance path by moving the connection conveyance path, the connection conveyance path can be expanded to a shape that follows the curvature of the document by a simple operation of swinging the guide plate.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing a first embodiment of an image reading apparatus according to the present invention.

FIGS. 2A and 2B are a plan view and a side view illustrating a main part of the image reading apparatus according to the first embodiment of the present invention. FIGS.

FIG. 3 is a configuration diagram schematically showing a second embodiment of the image reading apparatus according to the present invention.

FIG. 4 is a configuration diagram schematically showing a conventional image reading apparatus.

[Explanation of symbols]

1. Document bundle loading tray 2. Pickup roller 3
... feed roller, 4 ... reverse roller, 5,10,
24, 31: transport roller pair, 6: reverse transport path, 8: reading transport path, 8a, 8b, 27: guide plate, 9: contact type image sensor unit, 21: manual document loading tray,
22: Connection conveyance path, 23: Document sensor, 25: Registration roller pair, 28: Electromagnetic solenoid, D: Document.

Claims (4)

[Claims] An original bundle consisting of one or more originals is loaded into a document bundle loading section, and only one original is separated from the original bundle loaded in the original bundle loading section and fed. Separating sheet feeding means, a reversing section conveying means for conveying a document fed by the separating sheet feeding means along a reverse conveying path curved in a U-shape, and A reading section transporting means for transporting the fed document along a reading transport path on which a reading means for reading the document image is disposed, wherein the manual for loading the document for reading the image is manually inserted. A document loading unit, a loading unit transport unit that transports a document loaded in the manual document loading unit along a connection transport path connected to the reading transport path from the manual document loading unit, and the manual document transport unit. Conveyed Registering means for allowing the original to be fed from the connection transport path to the reading transport path after correcting the inclination of the original with respect to the transport direction by contacting the leading end of the original. Image reading device. 2. The apparatus according to claim 1, wherein the loading unit transport unit includes a transport roller that transports the original loaded in the manual document loading unit, and the transport roller is set in a non-rotating state when loading the original into the manual document loading unit. Constituting the resist means as
2. The image according to claim 1, wherein the non-rotating conveying roller corrects a tilt of the original with respect to a conveying direction by bringing a nip portion of the conveying roller into contact with a leading end of the original loaded in the manual original loading portion. Reader. 3. The loading section transporting means includes a transport roller that transports the original loaded in the manual document loading section, and the registration unit is disposed downstream of the transport roller in the transport direction and is transported by the transport roller. The document feeder is configured by a registration roller that abuts a nip portion on a leading end of a document to be conveyed to correct the inclination of the document with respect to the conveyance direction, and a connection conveyance path that connects the manual document loading unit and the reading conveyance path, 2. The image reading apparatus according to claim 1, further comprising: a loop storage unit that extends a space in the connection conveyance path along a document curved between a conveyance roller and the registration roller. 4. The loop storage means includes a guide plate which constitutes a part of the connection conveyance path and is swingably supported, and swings the guide plate outward to form a space in the connection conveyance path. 4. The image reading apparatus according to claim 3, wherein: