JP3471512B2 - Image reading device - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus applied to a copying machine, a facsimile machine, or the like, and more specifically, to a binder paper or a filing paper with punched holes, in which small holes are previously formed. The present invention relates to an image reading apparatus having means for discriminating the leading edge, trailing edge, and hole of an existing document.

[0001]

2. Description of the Related Art Conventionally, one-dimensional CCD (charge coupled)
It is known that an image reading device for reading image information of a document while moving the image reading means such as an image sensor and the document relatively is equipped with a so-called automatic document feeder. The automatic document feeder feeds a plurality of documents placed on a document tray one by one, conveys the fed documents to a predetermined reading position, and reads the document from which image information is read. It is to be carried out from the position.

Further, a detection sensor for detecting the presence / absence of a document is provided on the conveyance path of the automatic document conveying device, and by monitoring the on / off operation of the sensor, binder paper, filing paper with punched holes, etc. By discriminating between the leading and trailing edges of a document in which small holes are made in advance and the holes, or by skew feeding of the document and holes in the document, it is possible to make a false determination of the device due to the document holes. Those that prevent are known.

As a conventional device for preventing erroneous determination due to a hole in an original document, for example, Japanese Patent Application Laid-Open No. 57-96.
The feeding control device described in Japanese Patent No. 56 has been reported. This feeding control device is provided with reflection type sensors 64-1 and 64-2 for detecting skew feeding of a document in a direction orthogonal to the document feeding direction of the automatic document feeder (ADF) 40, and one of the sensors is provided. If the other sensor does not detect the original within the allowable time after the document is detected, a jam signal will be output, and after one sensor detects the original, the other sensor will detect the original within the allowable time. If the original is detected and then goes into the non-detected state, the control circuit is configured so that it does not output a jam signal because it is determined that the original has holes, and it is possible to determine the skew feeding of the original. At this time, there is an advantage that it is possible to prevent the document from being determined to be the skew feed by detecting the hole of the document even though the document is not the skew feed.

Further, as a conventional device for preventing erroneous determination due to a hole in an original document, for example, Japanese Utility Model Laid-Open No. 60-11904.
The jam detection device described in Japanese Patent No. 4 has been reported. This jam detecting device includes first detecting means (light source 21, light receiving element 22) and second detecting means (light source 120, light receiving element 121) for detecting the presence or absence of a document at the entrance and exit of the moving path of copying material. Are provided respectively, the signal representing the hole of the document obtained from the detecting means is removed by an integrating circuit, and only the signals representing the leading edge and the trailing edge of the document are used as input signals to monitor the transport state of the document. This has an advantage that it is possible to prevent a malfunction in jam detection due to a hole.

[0005]

However, in the conventional image reading apparatus for preventing erroneous discrimination due to the hole of the document, it is determined whether the document is the front and rear ends or the hole front and rear ends, respectively. Since it takes a lot of time to judge, especially when judging the trailing edge of a document or the trailing edge of a hole, even if the trailing edge of the document actually passes the detection sensor, the feeding of the next document starts immediately. However, there is a problem that a new waiting time occurs. That is, recently, an image reading apparatus is required to process a large number of originals at a high speed. In this image reading apparatus, the determination time is accumulated according to the number of originals, so that a plurality of originals are processed. However, there was a problem that the processing capacity would decrease. Further, in the above-described jam detecting device, the integration circuit for removing the signal indicating the hole of the document needs to be configured as a dedicated circuit, and thus the problem that the configuration becomes complicated remains.

In general, binder paper, filing paper with punched holes, and the like are in a so-called blank state outside the holes of the paper, and many of them do not need to be read by an image reading device. However, in the conventional image reading apparatus, since the entire document is uniformly read as image information from the leading edge to the trailing edge of the document, various image processing is performed even for unnecessary image information. Therefore, there remains a problem that the processing capability is lowered without efficiently reading the image information.

[0007]

Therefore, according to the present invention, the reading range representing the reading start position and the reading end position in the document feeding direction is set in advance based on the leading and trailing ends of the document and the leading and trailing ends of the hole. An object of the present invention is to provide an image reading device that can efficiently read image information by reading the image information in the reading range and improve the processing capability.

[0009]

In order to solve the above-mentioned problems, the present invention is capable of placing a reading unit for reading image information of a document conveyed to a predetermined reading position and a document stack made up of a plurality of documents. a document table, a document placed on the document table fed one by one, transportable enter City, the fed document to the reading position, a document image information read by said reading means conveying means for unloading from the reading position, the transportable
Located upstream of the reading position of the feeding means in the transport direction
It is provided on the transport path and is loaded by the transport means.
A detection unit that detects the presence or absence of a document and a detection unit that detects
Based on the output results, the leading and trailing edges of documents
Every time, determine the leading and trailing edges of the holes in this document
A discriminating means and the hole based on the discrimination result by the discriminating means.
Start position and reading position in the transport direction for documents with
Setting means for setting a reading range indicating the take-out end position;
The reading range is set based on the reading range set by the setting means.
The reading of the original having the hole loaded in the take-in position
Reading operation for controlling the start and end of the reading operation of the capturing means
And a control means .

According to the present invention, the entrance of the carrying means on the carrying path.
The presence of a document is detected by the detection means provided near the mouth
The determination means based on the detection result of the detection means.
Therefore, the leading and trailing edges of the document, and the leading and trailing edges of the holes
The rear end is determined. Therefore, due to the holes in the document
It is possible to prevent malfunction of the device. Also, the above setting
The leading and trailing edges of the document and the leading edge of the hole
And the reading range is preset based on the trailing edge.
Based on the discrimination information of the discrimination means by the detection means
The reading range is detected by the reading operation control means.
The reading operation by the reading means based on the detection result of the outputting means.
Control the start and end of the work. Therefore, the document tip
Based on the edge and trailing edge, and the leading and trailing edge of the hole
You can set the scanning range by eliminating unnecessary parts of the original.
Therefore, the image information can be read efficiently.
You can improve your physical ability.

The present invention is the above-mentioned invention, wherein the discrimination
Means, detection that the document is present by said detecting means
After the detection, it is determined that the document is
If it is detected for a period of time or more, it is judged as the trailing edge of the document and
After the trailing edge of the document is determined by the means, the detecting means
If the presence of a document is detected by
And the leading edge of the document is determined by the determination means.
Then, the detection means detects that there is no document.
Then, it is detected that there is a document again within the predetermined time.
In this case, the feature is that it is determined as a hole in the document.

In the present invention , the discriminating means is the detecting means.
After the document is detected by the step,
If it is detected that there is no document by the step for more than a predetermined time
If the original is the trailing edge of the original,
After the trailing edge of the
If it is detected that the leading edge of the document is detected,
After the leading edge of the document is discriminated by the discriminating means, the above-mentioned detection is performed.
The means detects that there is no document,
If it is detected again that there is a document in the
And the rear end are distinguished from each other. others
Therefore, the operating time of the detecting means is monitored and
Based on the leading and trailing edges of the original, and the leading and trailing edges of the holes.
And the trailing edge can be reliably discriminated.
Another means can be easily constructed by a simple circuit
It

In the present invention, the discrimination means
After the leading edge of the document is identified, the document is detected by the detection means.
If it is detected that there is no paper,
It is characterized by starting the feeding of .

In the present invention, the entrance of the carrying means on the carrying path.
The presence of a document is detected by the detection means provided near the mouth
The determination means based on the detection result of the detection means.
Therefore, the leading and trailing edges of the document, and the leading and trailing edges of the holes
The rear end is determined. Therefore, due to the holes in the document
It is possible to prevent malfunction of the device. Also, the detection
If the means detects that there is no document,
Since the feeding unit starts feeding the next original,
Feed of the next document is started regardless of the hole in the
It Therefore, it is possible to distinguish between the trailing edge of the document and the trailing edge of the hole.
It is possible to eliminate between waiting time by the processing capacity
You can improve your strength.

The present invention is the above-mentioned invention, wherein the reading is performed.
It has an input means for inputting information indicating a range, and
The step based on the information input by the input means.
It is characterized by setting the enclosure. In the present invention, the reading
An input means for inputting information indicating the range is provided, and the setting manual
According to the information input by the input means, the reading
The range is set so that it can be set. Because of this, before
The reading range is set by inputting the information indicating the reading range.
The read range can be set easily.
It

[0016]

[0017]

The present invention is the above-mentioned invention, wherein the input
The means provides information indicating the reading range by the operator.
Operation mode input by operation or via communication line
Mode of at least one of the reception modes
It is characterized in that it is input with the code. In the present invention , the input
Means, the information representing the reading range, by the operator
Operation mode input by operation or via communication line
Mode of at least one of the reception modes
Input. Therefore, the reading
The range can be easily set by the operator on the machine or
At least one that can be easily set by remote control
Either one can be realized .

The present invention is characterized in that, in the above-mentioned invention, the setting means sets a leading end and a trailing end of a document as the reading start position and the reading end position, respectively. In the present invention , the setting means is configured such that the leading edge and the trailing edge of the document are set as the reading start position and the reading end position, respectively. For this reason,
Since the reading range is set from the front end of the document to the rear end of the document, the image information from the front end of the document to the rear end of the document can be reliably read.

In the present invention according to the above-mentioned invention, when the setting means has a hole which can be detected by the detecting means, the leading end of the original is set as a reading start position and the closest to the rear end of the original. It is characterized in that the front end or the rear end of the hole of the document is set as the reading end position. The present invention
Then, the setting means is detected in the original by the detecting means.
If there is a possible hole, the leading edge of the document will
It is set and the hole of the document closest to the
The leading or trailing edge is set as the scanning end position
I am configuring. Therefore, from the leading edge of the document to the hole
The image information is read, and there is
It is excluded as necessary information. Therefore, reading the image information
It is possible to carry out the sampling efficiently and improve the processing capacity.
Wear.

In the present invention according to the above-mentioned invention, when the setting unit has a hole which can be detected by the detection unit, the leading or trailing end of the hole of the document closest to the leading end of the document is set as the reading start position. In addition to the setting, the rear end of the document is set as the reading end position. In the present invention , the setting means sets the reading start position to the leading or trailing edge of the document hole closest to the leading edge of the document when the document has a hole that can be detected by the detection means. The rear end of the document is set as the reading end position. Therefore, the image information from the hole to the trailing edge of the document is read, and the information from the leading edge of the document to the hole is excluded as unnecessary information. Therefore, it is possible to efficiently read the image information and improve the processing capability.

In the present invention according to the above-mentioned invention, when the setting means has a hole in the document which can be detected by the detecting means, the leading or trailing end of the hole of the document closest to the leading end of the document is set as the reading start position. Along with the setting, the leading or trailing edge of the hole of the document closest to the trailing edge of the document is set as the reading end position.

In the present invention , the setting means sets the leading or trailing edge of the hole of the document closest to the leading edge of the document as the reading start position when the document has a hole detectable by the detecting means. The leading edge or the trailing edge of the hole of the document closest to the trailing edge of the document is set as the reading end position. Therefore, the image information between the holes closest to the leading edge and the trailing edge of the document is read, and the rest is excluded as unnecessary information. Therefore, it is possible to efficiently read the image information and improve the processing capability.

According to the present invention , in the above-mentioned invention, the setting means sets the leading end and the trailing end of the document as the reading start position and the reading end position, respectively, and the leading end of the document is the reading start position. And a second mode in which the leading or trailing edge of the document hole closest to the trailing edge of the document is set as the reading end position, and the leading or trailing edge of the document hole closest to the document leading edge is read. A third mode in which the position is set as the position and the trailing edge of the document is set as the reading end position, and the leading or trailing edge of the document hole closest to the leading edge of the document is set as the reading start position and the trailing end of the document is set. And a fourth mode in which the leading or trailing edge of the hole of the document closest to is set as the reading end position, and the document has a hole that can be detected by the detection means, the first to fourth Wherein the one mode can be set by selecting one.

In the present invention , the setting means has the first mode, the second mode, the third mode and the fourth mode, and the document has a hole which can be detected by the detecting means. In this case, any one of the first to fourth modes is selected and set. For this reason,
The optimum mode can be easily selected and set according to the number of holes and the positions of the holes in the document conveying direction. Therefore, it is possible to efficiently read the image information and improve the processing capability.

[0026] The present invention is the invention described above, the setting means, and sets one of the first to fourth modes based on the input information by the input means. In the present invention , the setting means is configured to set any one of the first to fourth modes based on the input information from the input means. Therefore, it is possible to easily set the optimum mode suitable for the document.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing a preferred embodiment of an image reading apparatus according to the present invention. First,
The configuration will be described. 1 and 2 are cross-sectional views of the main parts of the image reading apparatus. As shown in FIG. 1, the image reading apparatus includes a reading unit 1 that optically reads image information of a document and converts the image information into an image signal, and one document placed on a paper feed tray (document placing table) 20. An automatic document feeder 2 that feeds each of the documents, conveys the fed document to a reading position S in the drawing, and carries out the document whose image information has been read by the reading unit 1 from the reading position S is provided. , The automatic document feeder 2 has a contact glass 1
0 and a contact glass 11 provided below the reading position S on the document transport path and extending a short length in the document transport direction, are provided on the reading unit 1.

The reading unit 1 corresponds to a reading means and includes an irradiation lamp 12, mirrors 13 to 15, a condenser lens 16, a CCD image sensor 17 and a traveling body motor 19. The irradiation lamp 12 irradiates a document passing through the reading position S in the figure with light through the contact glass 11. The reflected light of the document irradiated by the irradiation lamp 12 passes through the contact glass 11, is sequentially reflected by the mirror 13, the mirror 14, and the mirror 15, and then is condensed by the condenser lens 16 to be collected by the CCD image sensor 17.
Is incident on. CCD image sensor 17 is SBU
It is mounted on the (Sensor Board Unit) 18, and the reflected light of the document condensed by the on-board condenser lens 16 is made incident, and the incident light is converted into an electric signal according to its intensity, so that the document is made. The image information of is read.

Further, the irradiation lamp 12 and the mirror 13-
Reference numeral 15 is integrally configured as a traveling body, and is driven by a traveling body motor 19 which is a stepping motor and is movable in the direction A in the drawing. When the original is placed directly on the contact glass 10, the traveling motor 18
By this, the traveling body is moved in the sub-scanning direction to read the image information of the document. On the other hand, when the original is fed by the automatic original feeding section 2, the traveling body is moved to the reading position S below the contact glass 11 extending a short length in the original feeding direction, and the automatic original feeding section 2 moves the original. The image of the original that is conveyed and passes through the reading position S is read.

The automatic document feeder 2 corresponds to a feeding means ,
Pickup roller 21, a pair of registration rollers 22,
The transport drum 23, idle rollers 24 to 26, paper discharge rollers 27 and 28, a paper feed motor 29 (not shown), and a transport motor 30 are provided. A plurality of originals can be placed on the paper feed tray 20 serving as an original placing table, and the original placing surface of the paper feeding tray 20 moves to the pickup roller 21 side to separate the original placing surface and the pickup roller 21. The manuscript is sandwiched between them.

The pickup roller 21 is the paper feed tray 20.
The original is fed from the pickup roller 21, and the original fed by the pickup roller 21 is fed by the pair of registration rollers 22 at a predetermined timing, and then is fed to the conveying drum 23 and an idle roller slidably contacting the conveying drum 23. It is reversed by 24 to 26 and conveyed to the reading position S. The idle rollers 24 to 26 are arranged along the circumferential direction of the conveying drum 23, and sandwich and convey the original with the conveying drum 23. The document from which the image information of the document passing through the reading position S has been read by the reading unit 1 is fed by the discharge roller 2
After being conveyed by 7, 28, the sheet is discharged to the sheet discharge tray 31.

The pickup roller 21 and the pair of registration rollers 22 are driven by a sheet feeding motor 29 (not shown), and the conveying drum 23, the idle rollers 24 to 26, and the sheet discharging rollers 27 and 28 are conveyed. It is adapted to be driven by a motor 30. Further, as shown in FIG. 2, the image reading apparatus includes a paper feed sensor 32, a reading start sensor 33, and a paper discharge sensor 34. Each of these sensors is a known transmissive sensor that detects the presence or absence of a document on the document conveyance path, and outputs an ON state signal when there is a document and an OFF state signal when there is no document. Each sensor is provided in the center in the width direction on the document feeding path, and the paper feed sensor 32 is a pair of registration roller 22 and idle roller 2.
4 is provided between the reading start sensor 33 and the reading position S.
The sheet discharge sensor 34 is provided near the upstream side of the sheet discharge roller 28.

The paper feed sensor 32 corresponds to a detecting means and determines whether or not the document has been reliably fed, and the leading edge of the document and the trailing edge of the document and the holes (the tip of the hole and the leading edge of the document) previously formed in the document. It is provided to distinguish the rear end).
Based on the result of this determination, the reading range that represents the range between the reading start position and the reading end position in the document conveyance direction is specified, and the timing for starting the feeding of the next document is controlled.

The reading start sensor 33 is provided to control the start of the reading operation of the reading means 1, and the irradiation lamp 12 and the CCD image are read out a predetermined time after the leading edge of the document is detected by the reading start sensor 33. The sensor 17 is designed to start operating. This is because the time required for the document fed from the paper feed tray 20 to reach the reading position S varies.
It is provided in order to reduce this variation and ensure that the timing at which the leading edge of the document reaches the reading position S and the timing at which the irradiation lamp 12 and the CCD image sensor 17 start operating are matched.

The paper discharge sensor 34 is provided to determine whether or not the document whose image information has been read by the reading means 1 has been reliably discharged onto the paper discharge tray 31. Paper feed sensor 32, reading start sensor 33, and paper discharge sensor 34
Constitutes the document presence / absence detection unit 4. FIG. 3 is a system configuration diagram of the image reading apparatus shown in FIGS. As shown in FIG. 3, the image reading apparatus includes a system control unit 3, a reading unit 1, an automatic document feeding unit 2, a document presence / absence detection unit 4, an operation display unit 5, an RCU 6, a video adapter 7, and an IE.
It is composed of U8 and DCU9, and each unit is connected by a bus. The reading unit 1, the automatic document feeding unit 2, and the document presence / absence detecting unit 4 have been described with reference to FIGS.

The system control unit 3 uses the CP shown in FIG.
U51, EPROM52, EEPROM53 and RA
It has M54 inside. EPROM (erasable and
A programmable ROM) 52 stores a control program for this device, and an EEPROM (electrically era
The sable and programmable ROM) 54 stores the operation history information of each part of the apparatus such as the number of times the CCD image sensor 17 has been operated, and the operation information by the operation of an operator or the like. Further, the RAM 53 stores the control data of this apparatus. CPU51 is EPRO
Control program and EEPR stored in M52
The entire apparatus is controlled based on the data stored in the OM 53 and the RAM 54.

Further, the system control section 3 has an image memory therein, performs image processing on the image signal read and output by the reading section 1 and outputs the image signal, and controls communication with a host computer (not shown). To do. Further, the system control unit 3 has a plurality of timers therein, and monitors the on / off operation time of the paper feed sensor 32, the reading start sensor 33, and the paper discharge sensor 34 of the document presence / absence detection unit 4 to detect the automatic document. It controls the operations of the paper feed motor 29 and the paper discharge motor 30 of the transport unit 2, and also controls the operations of the irradiation lamp 12 and the CCD image sensor 17 of the reading unit 1.

The operation display section 5 is for inputting operation information operated by an operator and displaying operation information and status information of the apparatus. The operation display unit 5 has a function of an input unit and includes a setting mode selection button and a high-speed paper feed mode setting button (not shown). The reading mode setting button is used to start reading a document when a document with pre-punched holes, such as binder paper or filing paper with punched holes, is fed by the automatic document feeder 2 and the image information of the document is read. A button for setting a reading range indicating a position and a reading end position.

In the reading range, the leading edge and the trailing edge of the original are set to the reading start position and the reading ending position, respectively, in the normal mode (first mode), and the leading edge of the original is set to the reading start position and the trailing edge of the original is set. Rear end hole mode (second mode) in which the rear end of the closest hole is the reading end position, and the rear end of the document is the reading end position and the rear end of the document is the leading end. Hole mode (third mode) and double-end hole mode (fourth mode) in which the rear end of the hole closest to the leading edge of the document is the reading start position and the rear end of the hole closest to the rear end of the document is the reading end position ) Four reading modes.

Normally, the normal mode is set, and every time the reading mode setting button is pressed, the rear end hole mode,
The settings are repeatedly switched in the order of the tip hole mode, the double-end hole mode, and the normal mode. It should be noted that this mode setting is effective before a start button (not shown) is pressed and document feeding is started, and cannot be changed during operation of the apparatus.

The high speed paper feed mode setting button is for changing the paper feed timing of the next original. Normally, it is set to feed the next original after the trailing edge of the original is confirmed based on the detection result of the paper feed sensor 32. When the high-speed paper feed setting button is pressed, the leading edge of the document is confirmed based on the detection result of the paper feed sensor 32, and when the paper feed sensor 32 detects that there is no document, the next document is detected. The high-speed paper feed mode in which the paper feed is started is set. Also, when this button is pressed again, the setting is canceled.
This setting is also effective before the start of the document feeding by pressing the start button (not shown), and cannot be changed during the operation of the apparatus.

When this high speed paper feed mode setting is set,
After the leading edge of the original is confirmed by the paper feed sensor 32 based on the output signal, when the absence of the original is detected by the paper feed sensor 32, the next original is detected regardless of whether it is the hole of the original or the rear edge of the original. Since the paper feeding is started, the processing time of the apparatus can be improved by eliminating the time required to discriminate between the document hole and the trailing edge of the document.

The reading mode and the high-speed paper feeding mode can be set not only by the operation of the operation display section 5, but also by the remote operation of the host computer or the terminal device through the communication line. It has become. The system control unit 3 has a function of a discriminating unit and discriminates a leading edge and a trailing edge of a document passing through the sheet feeding sensor 32, and a leading edge and a trailing edge of a hole of the document based on a detection signal of the sheet feeding sensor 32. At the same time, the document clogging near the paper feed sensor 32 is determined. After the paper feed sensor 32 is turned on, if the off state is detected for a predetermined time T1 or more, it is determined that the trailing edge of the document, and after the trailing edge of the document is determined,
When the ON state is detected, it is determined as the leading edge of the document. After the leading edge of the document is determined, the OFF state is detected, and when the ON state is detected again within the predetermined time, it is determined as the document hole. . Further, the system control unit 3 determines that the document is clogged when the ON state of the paper feed sensor 32 is detected for a predetermined time T2 or more.

Further, the system control section 3 uses the paper feed sensor 3
As in the case of 2, the leading edge and the trailing edge of the document passing through the reading start sensor 33 based on the detection signal of the reading start sensor 33,
In addition, the leading edge and the trailing edge of the document hole are determined, and the document clogging near the reading start sensor 33 is determined. Further, the system control unit 3 determines a document clogging in the vicinity of the paper ejection sensor 33 based on the detection signal of the paper ejection sensor 33.

Further, the system control section 3 includes setting means,
It has a function as a reading operation control means and sets the reading range of the mode set by the reading range setting button of the operation display unit 5. The time T3 from the leading edge of the document passing through the paper feed sensor 32 to the reading start position and the conveyance time T4 from the reading start position to the reading end position of the document are detected based on the operation of the reading start sensor 33. When the leading edge of the document is determined by the reading unit 1, the reading unit 1 returns after the total time (T3 + T5) of the time T5 until the leading edge of the document reaches the reading position S and the time T3 from the leading edge of the document to the reading start position.
When a signal for instructing the start of the reading operation is output to the irradiation lamp 12 and the SBU 18 of FIG.
A signal instructing the end of the reading operation is output. It should be noted that T3 = 0 when the leading edge of the document coincides with the reading start position. Further, when T3 ≠ 0, the system control unit 3 adds information for line break corresponding to T3 to the page break information in order to correct the positional deviation during image reproduction.

RCU6, video adapter 7, IEU8,
The DCU 9 and the DCU 9 are optional units of the image reading apparatus and perform special image processing. RCU (Re
The verse side control unit) 6 controls reading on the back side of the document, and is provided together with the optical system member similar to the reading unit 1 when reading both sides of the document P at the same time. The video adapter 7 is for inputting another video signal outside the apparatus. IEU (Image Enharce Unit)
Reference numeral 8 is for outputting the input video signal after performing image area separation for separating it into photographic information and character information. DCU
The (Data Compression Unit) 9 converts the input video signal into, for example, JPEG (Joint Photographic Coding Expe).
rts Group) and JBIG (Joint Bi-Level Image Codin)
g Experts Group) and other various information compression methods are used for compression and output.

FIG. 4 is a block diagram showing a detailed structure of the image reading apparatus shown in FIG. 3. In FIG. 4, the image processing of the image signal photoelectrically converted by the CCD image sensor 17 will be mainly described. The system control unit 3 uses MB
It is composed of U40, SCU50, and ADU70. The MBU 40 and the SCU 50 are connected by a connector pair 80, and the MBU 40 and the ADU 70 are connected by a connector pair 81. Further, the MBU 40 and the RCU 6 can be connected by the connector pair 82, and the SCU 50 and the video adapter 7 can be connected by the connector pair 8.
3, the SCU 50 and the IEU 8 connect the connector pair 84.
The SCU 50 and the DCU 9 can be connected by the connector 85.

The MBU 40 is connected to the irradiation lamp 12, the SBU 18, and the traveling body motor 19 of the image reading unit 1, and is also connected to the operation display unit 5. SB
A U (Sensor Board Unit) 18 converts the reflected light of the document P incident on the CCD image sensor 17 into an analog signal having a voltage value corresponding to the intensity of light, and further converts this analog signal into odd bits and even bits. Separate and MBU40
Output to. The MBU (Mother Board Unit) 40 has an AHP 41 and an A / D converter 42 inside. AHP (Analogue data Handling Peripheral) 4
1 receives the analog signal output from the SBU 18, removes the dark potential portion from the input analog signal of the odd bit and the even bit, synthesizes the odd bit and the even bit again, and adjusts the gain to a predetermined amplitude. And outputs it to the A / D converter 42. The A / D converter 42 converts the analog signal output from the AHP into a digital signal and outputs the digital signal to the SCU 50.

The SCU (Scanner Control Unit) 50 is
CPU51, EPROM52, EEPROM5 inside
3, RAM 54, SIPT 55, selector 56, selector 57, selector 58, SBC 59, DRAM 60, S
It has an IMM 61, a selector 62 and a SCSI controller 63. SIPT (Scanner Image Peripher)
al Three) 55 has one input terminal and two output terminals, and the input terminal is connected to the MBU 4 via the connector pair 80.
0 is connected to the A / D converter 42, one output terminal is connected to the selector 56, and the other output terminal is connectable to the IEU 8 via the connector pair 84. The SIPT 55 inputs the digital signal output from the A / D converter 42, performs image processing such as shading correction, gamma correction, and MTF correction on the input signal, and binarizes the digital signal to obtain a page synchronization signal and a line signal. ,
The video signal is output to the selector 56 and the IEU 8 together with the image clock. The IEU 8 inputs the video signal output from the SIPT 55, performs image area separation, and outputs the video signal to the selector 56.

The selector 56 has two input terminals and one output terminal, one input terminal is connected to the SIPT 54, and the other input terminal is I through the connector pair 84.
It is possible to connect with EU8. The output terminal is connected to the selector 57. The selector 56 switches and connects either one of the input terminal and the output terminal,
A video signal is input by selecting whether or not image area separation is performed by the IEU 8, and the input video signal is selected by the selector 57.
Output to.

The selector 57 has two input terminals and one output terminal, one input terminal is connected to the selector 56, and the other input terminal is through the connector pair 80 and the connector pair 82 of the MBU 40. It is possible to connect with RCU6. The output terminal is connected to the selector 58. The selector 57 selects and inputs the reading surface (front surface or back surface) of the original by switching and connecting either one of the input terminal and the output terminal, and outputs the input bio signal to the selector 58. The RCU 6 that controls the reading of the back surface is controlled by the CPU 51 through serial communication.

The selector 58 has two input terminals and one output terminal, one input terminal is connected to the selector 57, and the other input terminal is connectable to the video adapter 7 via the connector pair 83. Has become. The output terminal is connected to the SBC 59. The selector 58 selects and inputs the video signal of the original document and the video signal input via the video adapter 7 by switching and connecting either one of the input terminal and the output terminal, and the input bio-signal. Is output to the SBC 59.

SBC (Sanner Buffer Controller) 59
Is a DRAM 60 and SIMM (Single Inline Memo)
module for controlling the image memory, which stores the video signal output from the selector 58 in the image memory and connects the stored video signal through the selector 62 and the connector pair 85. Output to the DCU 9. The DCU 9 compresses the video signal output by the SBC 59 by a predetermined image compression method and outputs the compressed video signal to the selector 62.

The selector 62 has two input terminals and one output terminal, one input terminal is connected to the SBC 59, and the other input terminal is DC through the connector pair 85.
Can be connected to U9. The output terminal is SCS
It is connected to the I controller 63. Selector 62
Switches between one of the input terminals and the output terminal to connect it, selects whether or not to perform image compression by the DCU 9, inputs a video signal, and outputs the input video signal to the SCSI controller 63. .

The SCSI controller 63 is the CPU 51
The video signal output from the selector 62 is input, and the input video signal is output to a host computer (not shown) via a communication line. Also,
A control signal is input to the SCSI controller 63 from a host computer (not shown), and the above-mentioned reading mode and high-speed paper feed mode are set.

An ADU (ADF Driving Unit) 70 has a function as a relay unit for supplying electric power to the automatic document feeder 2 and the document presence / absence detection unit 4, and has a paper feed motor 29 and a feed motor of the automatic document feeder 2. The sheet feeding sensor 32, the reading start sensor 33, and the sheet ejection sensor 34 of the document presence / absence detecting unit 4 are connected. Next, the operation will be described with reference to FIG. 5, which is a timing chart showing the operation of feeding the next original by the paper feed motor 29 of the automatic original feeding section 2. In the figure, a high level signal indicates when the paper feed sensor 32 detects the presence of a document (on state), and a low level signal when the absence of a document is detected (off state). It is represented by. A high level signal indicates when the paper feed motor is driven, and a low level signal indicates when the paper feed motor is not driven. The feeding of the first original is started by pressing the start button of the operation display unit 5.

FIG. 5 (a) shows a paper feed tray 2 for documents without holes.
A timing chart in the case where the next original is started to be fed at the time when the rear end of the original is detected without being distinguished by the paper feed sensor 32 between the hole of the original and the rear end of the original, Is. In this case, when the trailing edge of the first document passes the paper feed sensor 32, the output of the paper feed sensor 32 changes from the on state to the off state, and the paper feed motor 29 is driven in synchronization with this timing. Feeding of the first document starts.
The time period from the passage of the trailing edge of the first document to the detection of the second document by the paper feed sensor 32 is 0.5 seconds, and the paper feed motor 29 operates the pickup roller 21 during this time.
And the registration roller 22 is driven to feed the document.

In FIG. 5B, an original having a hole near the rear end is placed on the paper feed tray 20, and the next original is fed after the original hole and the rear end of the original are discriminated. It is a timing chart when doing. Here, when the output of the paper feed sensor 32 in the OFF state has passed T1 = 0.3 seconds or more, it is determined that the trailing edge of the document has passed, and when the output of the paper feed sensor 32 in the OFF state is within 0.3 seconds. It is designed to be identified as a hole in a document. The time taken for the document hole to pass through the paper feed sensor 32 is 0.1 seconds.

In this case, it takes 0.3 seconds to determine the hole of the original document and the rear end of the original document, so that the second original document passes after the rear end of the first original document passes by the paper feed sensor 32. It takes 0.8 seconds to detect. The waiting time of 0.3 seconds is accumulated in proportion to the number of documents. Therefore, in FIG. 5B, by discriminating the leading and trailing edges of the document from the holes of the document, it is possible to prevent the malfunction of the device due to the holes of the document, but the processing capability is lowered. It's closed.

FIG. 5C is a timing chart showing the paper feed operation when the high-speed paper feed mode is set for the same document as in FIG. 5B. In this case, when the output of the detection sensor 32 is changed from the ON state to the OFF state regardless of whether the hole of the document or the rear end of the document is detected after the leading edge of the document is detected, the feeding of the second document is immediately started. It Therefore, in the case of a document without a hole, the waiting time is eliminated, and the next document is fed at the same timing as in FIG. 5A. The next original is fed at a timing earlier than the time required for the rear end of the original to be conveyed from the front end of the hole indicated by A in the figure. Therefore, the processing capacity of the device is improved. However, the leading edge of the hole of the document needs to be within 0.5 seconds in feeding time from the trailing edge of the document. This is to prevent double feeding of the first original and the second original.

FIG. 6 shows the output of the paper feed sensor 32 in each reading mode of the reading mode setting button when the original having the holes both near the leading edge and near the trailing edge of the original is conveyed by the automatic document feeder 1. It is a figure which shows the reading range detected based on a signal. The high-speed paper feed mode is not set. As shown in FIG. 6, as the detection signal of the paper feed sensor 32, a high level signal is output when the presence of a document is detected (ON state), and the absence of the document is detected (OFF state). ) Sometimes it outputs a low level signal.

As shown in FIG. 6A, in the normal mode, the reading range is detected with the leading end and the trailing end of the original as the reading start position and the reading end position, respectively. As shown in FIG. 6B, when the trailing edge mode is set, the reading range is detected with the leading edge of the document as the reading start position and the trailing end of the hole on the trailing end side of the document as the reading end position. . As shown in FIG. 6C, when the leading edge mode is set, the reading range is detected with the trailing edge of the leading edge side of the document as the reading start position and the trailing edge of the document as the reading end position. As shown in FIG. 6D, when the double-sided hole mode is set, the rear end of the hole on the front end side of the document is the reading start position, and the rear end of the hole on the rear end side of the document is the reading end position. The range is detected. The operation of detecting the reading range in each mode will be described below with reference to the flowcharts of FIGS. Here, it is assumed that the trailing edge of the previous document has already been confirmed.

FIG. 7 is a diagram showing an operation of detecting the reading range of an original based on the output signal of the paper feed sensor 32 when the reading mode is the normal mode. First, when the output signal of the paper feed sensor 32 changes to the ON state (step S1), the system controller 3 determines that the leading edge of the original has passed,
After 0.3 seconds (step S2), the first timer starts counting (step S3).

Next, when the output signal of the paper feed sensor 32 changes to the off state (step S4), it is judged whether or not this off state has passed for 0.3 seconds or more (step S).
5). If the off state changes to the on state within 0.3 seconds, the process returns to step S4. On the other hand, when the off state has passed for 0.3 seconds or more, the system control unit 3 determines that the trailing edge of the document has passed, and ends the counting of the first timer (step S6).

Since the first timer starts counting 0.3 seconds after the trailing edge of the document has been discriminated, which is the time T2 for determining the trailing edge of the document, the first timer counts when the trailing edge of the document is discriminated. By ending, the reading range from the leading edge of the document to the trailing edge of the document is substantially detected. FIG. 8 is a diagram showing an operation of detecting the reading range of the document based on the output signal of the paper feed sensor 32 when the reading mode is the rear end hole mode. First, when the output signal of the paper feed sensor 32 changes to the ON state (step S11), the system control unit 3 determines that the leading edge of the original has passed, and the first and second
The timer starts counting (step S12).

Next, when the output signal of the paper feed sensor 32 changes to the off state (step S13), it is judged whether or not this off state has passed for 0.3 seconds or more (step S1).
4). Here, when the off state changes to the on state within 0.3 seconds, the count of the second timer is reset, the count is started again (step S15), and the process returns to step S13. On the other hand, when the off state has passed for 0.3 seconds or more, the system controller 3 determines that the trailing edge of the document has passed, and ends the counting of the first and second timers (step S16).

Next, the count number t1 of the first timer and the count number t2 of the second timer are compared (step S
17) When the count number t1 of the first timer is equal to the count number t2 of the second timer, it is determined that there is no hole in the document, and the determination time T1 is 0.3 from the count number t1 of the first timer. The time corresponding to the reading range is detected by subtracting the second (step S18). On the other hand, the count number t1 of the first timer and the count number t2 of the second timer
If is different from, the count corresponding to the reading range is detected by subtracting the count t2 of the second timer from the count t1 of the first timer (step S19).

When a document has a hole, the first timer detects the time from when the leading edge of the document is determined until when the trailing edge of the document is determined, and the second timer detects the hole closest to the trailing edge of the document. The time from the determination of the trailing edge of the original to the determination of the trailing edge of the document is detected. FIG. 9 is a diagram showing an operation of detecting the reading range of the document based on the output signal of the paper feed sensor 32 when the reading mode is the front end hole mode. First, when the output signal of the paper feed sensor 32 changes to the ON state (step S2
1) The system controller 3 determines that the leading edge of the document has passed, and starts counting by the first and third timers (step S22).

Next, when the output signal of the paper feed sensor 32 changes to the off state (step S23), it is judged whether or not this off state has passed for 0.3 seconds or more (step S2).
4). Here, when the off state changes to the on state within 0.3 seconds, the counting of the third timer is ended (step S25), and the process returns to step S23. On the other hand, when the off state has passed for 0.3 seconds or more, the system control unit 3 determines that the trailing edge of the document has passed, and ends the counting of the first and third timers (step S26).

Next, the count number t1 of the first timer and the count number t3 of the third timer are compared (step S
27) When the count number t1 of the first timer is equal to the count number t3 of the third timer, it is determined that there is no hole in the document, and the time T3 from the leading edge of the document to the reading start position is set to 0 and , The count number t of the first timer
The time corresponding to the reading range is detected by subtracting 0.3 second which is the discrimination time T1 of the trailing edge of the document from 1 (step S2).
8). On the other hand, when the count number t1 of the first timer and the count number t3 of the third timer are different, the count number t3 of the third timer is set to the time T3 from the leading edge of the document to the trailing edge of the hole closest to the leading edge of the document. And the count t1 of the first timer to the count t of the third timer
3 and the discrimination time T1 of 0.3 seconds are subtracted to detect the time T4 corresponding to the reading range (step S2).
9).

If the document has a hole, the first timer detects the time from when the leading edge of the document is determined until when the trailing edge of the document is determined, and the third timer detects the leading edge of the document and then The time until the trailing edge of the hole closest to the leading edge of the document is determined is detected. FIG. 10 is a diagram showing an operation of detecting the reading range of the document based on the output signal of the paper feed sensor 32 when the reading mode is the double-end hole mode. First, when the output signal of the paper feed sensor 32 changes to the ON state (step S3
1), the system controller 3 determines that the leading edge of the document has passed, and starts counting by the first, second and third timers (step S32).

Next, when the output signal of the paper feed sensor 32 changes to the off state (step S33), it is determined whether this off state has passed for 0.3 seconds or more (step S3).
4). Here, when the off state changes to the on state within 0.3 seconds, the count of the second timer is reset, the count is started again, and the count of the third timer is ended (step S35), and step S33.
Return to. On the other hand, when the off state has passed for 0.3 seconds or more, the system control unit 3 determines that the trailing edge of the document has passed, and ends the counting of the first, second, and third timers (step S26).

Next, the count number t1 of the first timer and the count number t3 of the third timer are compared (step S
27) When the count number t1 of the first timer is equal to the count number t3 of the third timer, it is determined that there is no hole in the document, and the time T3 from the leading edge of the document to the reading start position is set to 0 and , The count number t of the first timer
The time T4 corresponding to the reading range is detected by subtracting 0.3 second, which is the discrimination time T1 of the trailing edge of the document, from 1 (step S38).

On the other hand, when the count number t1 of the first timer and the count number t3 of the third timer are different, the second count
It is determined whether the sum of the count number t2 of the timer and the count number t3 of the third timer is equal to the count number t1 of the first timer. Here, if t1 = t2 + t3, it is determined that the document has only one hole, and step S38 is performed.
Proceed to. On the other hand, when t1 ≠ t2 + t3, the count number t3 of the third timer is set to the time T3 from the leading edge of the document to the trailing edge of the hole closest to the leading edge of the document, and the count number t1 of the first timer is set to the second value. The count number t2 of the timer and the count number t3 of the third timer are subtracted to detect the time T4 corresponding to the reading range (step S3).
9). FIG. 11 shows the relationship between the output signal of the paper feed sensor 32 and the count numbers of the first, second and third timers in the double-end hole mode. FIG. 11A shows the case where the original has only one hole, and FIG. 11B shows the case where the original has two holes.

FIG. 12 is a flow chart showing the operation of the irradiation lamp 12 and the SBU 18 of the reading section 1. Here, it is assumed that the trailing edge of the previous document has already been determined based on the detection result of the reading start sensor 33. First, when the output signal of the reading start sensor 33 changes to the ON state (step S51), the system control unit 3 determines that the leading edge of the original has passed, and the time T3 + T5 until the reading start position of the original reaches the reading position 3 Is counted (step S52), and a signal instructing to start the reading operation is output to the reading unit 1 (step S53). Next, the paper feed sensor 32
When a time T4 corresponding to the reading range detected based on the output signal of 1 has elapsed, a signal for instructing the reading unit 1 to end the reading operation is output.

As described above, in the embodiment of the present invention, the automatic
Paper feed cell provided around the entrance of the conveying path of the document conveying unit 2
The presence or absence of the original is detected by the sensor 32 , and the paper feed sensor 3
System control unit 3 (discriminating means) based on the detection information of 2.
The leading and trailing edges of the document and the leading and trailing edges of the hole are discriminated from each other. Therefore, it is possible to prevent the malfunction of the device due to the hole of the document. In addition, the paper feed cell
If the sensor 32 detects that there is no document, the automatic document feeding means starts feeding the next document, so that the next document can be fed regardless of the hole of the document or the trailing edge of the document. Be started. Therefore, it is possible to eliminate the waiting time due to the determination of the trailing edge of the document or the trailing edge of the hole, so that the processing capability can be improved.

In the embodiment of the present invention, the automatic original
Paper feed sensor provided near the entrance on the transport path of the transport unit 2
32 presence of a document is detected by the tip and the rear end of the document by the system control unit 3 (discriminating means) based on detection information of the paper feed sensor 32, and the front and rear ends of the holes is determined. Therefore, it is possible to prevent the malfunction of the device due to the hole of the document. Further, the system control section 3 (setting means) sets the reading range of the document based on the leading and trailing ends of the document and the leading and trailing ends of the holes.
It is set in advance and the system control unit 3 (reading operation control hand
The reading operation by the reading unit 1 (reading means).
Control start and end. Therefore, the reading range can be set by eliminating unnecessary portions of the document based on the leading and trailing ends of the document and the leading and trailing ends of the holes, so that the image information can be efficiently read and processed. You can improve your ability.

Further, the system control section 3 (determination means) is
After the document by the feed sensor 32 is present is detected, if the absence of original document by the paper feeding sensor 32 is detected for a predetermined time or more, it is determined that the rear end of the document, the system controller 3 (discriminating means) After the trailing edge of the original is determined, when the presence of the original is detected by the paper feed sensor 32 , it is determined as the leading edge of the original, and after the leading edge of the original is determined by the system control unit 3 (determining means), Paper feed sensor
When the presence of the document is detected by the server 32 and the presence of the document is detected again within the predetermined time, the leading end and the trailing end of the hole are discriminated. Thus, the tip and the rear end of the document on the basis of the predetermined time to monitor the operating time of the paper feed sensor 32, as well, it is possible to reliably determine the leading and trailing ends of the holes, cis
The system control unit 3 (discriminating means) can be easily configured by a simple circuit.

Further, a system control unit 3 and an operation display unit 5 (input means) for inputting the information indicating the reading range are provided, and the system control unit 3 and the operation display unit 5 (input unit) are operated by the system control unit 3 (setting unit). The reading range is set on the basis of the input information by the means). Therefore, since the reading range is set by inputting the information indicating the reading range, it is possible to easily set the reading range.

Further, the operation display section 5 (input means) is constructed so that the information indicating the reading range is inputted by the operation of the operator. Therefore, the operator can easily set the reading range on the apparatus.
Further, the system control unit 3 (input means) is configured so that the information indicating the reading range is input via a communication line. Therefore, the reading range can be easily set by remote control.

Further, the system control section 3 and the operation display section 5 (input means) have an operation mode in which the information indicating the reading range is input by an operator's operation and a reception mode in which the information is input via a communication line. Is configured as follows. Therefore, the reading range can be easily set by the operator on the apparatus and can be easily set by remote control.

Further, the system control section 3 (setting means)
Is configured so that the leading end and the trailing end of the document are set as the reading start position and the reading end position, respectively. Therefore, the range from the leading edge of the document to the trailing edge of the document is set as the reading range, so that the image information from the leading edge of the document to the trailing edge of the document can be reliably read.
In addition, the system control unit 3 (setting means) is used to feed the document .
If there is a hole that can be detected by the sensor 32 , the leading end of the document is set as the reading start position, and the leading or trailing end of the hole of the document closest to the trailing end of the document is set as the reading end position. is doing. Therefore, the image information from the leading edge of the document to the hole is read, and the information from the hole to the trailing edge of the document is excluded as unnecessary information. Therefore, it is possible to efficiently read the image information and improve the processing capability.

Further, the system control section 3 (setting means) is
If the document has a hole that can be detected by the paper feed sensor 32 ,
The leading edge or the trailing edge of the document hole closest to the leading edge of the document is set as the reading start position, and the trailing edge of the document is set as the reading end position. Therefore, the image information from the hole to the trailing edge of the document is read, and the information from the leading edge of the document to the hole is excluded as unnecessary information. Therefore, it is possible to efficiently read the image information and improve the processing capability.

Further, the system control section 3 (setting means) is
If the document has a hole that can be detected by the paper feed sensor 32 ,
The leading or trailing edge of the document hole closest to the leading edge of the document is set as the reading start position, and the leading or trailing edge of the document hole closest to the trailing edge of the document is set as the reading end position. is doing. Therefore, the image information between the holes closest to the leading edge and the trailing edge of the document is read, and the rest is excluded as unnecessary information. Therefore, it is possible to efficiently read the image information and improve the processing capability.

Further, the system control section 3 (setting means)
The normal mode (first mode), the rear end hole mode (second mode)
Mode), a front hole mode (third mode), and a double-end hole mode (fourth mode), and the document has a hole that can be detected by the paper feed sensor 32. The reading mode is selected and set. Therefore, the optimum mode can be easily selected and set according to the number of holes and the positions of the holes in the document transport direction. Therefore, it is possible to efficiently read the image information and improve the processing capability.

In addition, the system control unit 3 (setting means)
One of the four reading modes is set based on the input information from the system control unit 3 and the operation display unit 5 (input means). Therefore, it is possible to easily set the optimum mode suitable for the document. In the embodiment of the present invention, the on / off operation of the paper feed sensor 32 and the reading start sensor 33 is monitored by using a timer to determine the leading edge and trailing edge of the document and the leading edge and trailing edge of the hole. , The feeding of the next document is controlled, and the operation of the reading unit 1 is controlled, but not limited to the timer , for example, the rotation angles of the sheet feeding motor 29 and the feeding motor 30 are set so as to correspond to the feeding distance of the document. You may detect and monitor the on-off operation of each sensor of the document presence detection part 5.

[0087]

According to the present invention, the conveying path of the conveying means
Presence / absence of documents by the detection means provided near the upper entrance
The discriminating hand based on the detection result of the detecting means.
Depending on the step, the leading and trailing edges of the document, and the leading edge and
And the rear end. Therefore, it is possible that the
It is possible to prevent malfunction of the device. In addition, the above
The leading and trailing edges of the document
The reading range is preset based on the edge and the trailing edge.
Based on the discrimination information of the discrimination means by the detection means
The reading range is detected by the reading operation control means.
The reading operation by the reading means based on the detection information of the outputting means.
Control the start and end of the work. Therefore, the document tip
Based on the edge and trailing edge, and the leading and trailing edge of the hole
You can set the scanning range by eliminating unnecessary parts of the original.
Therefore, the image information can be read efficiently.
You can improve your physical ability.

According to the present invention, the discriminating means is configured to detect the
After the document is detected by the output means,
The output means detects that there is no document for a predetermined time or more.
If the original is the trailing edge of the original,
After the trailing edge of the manuscript is identified, the document is detected by the detection means.
If it is detected that it is the leading edge of the document,
After the leading edge of the document is discriminated by the discriminating means, the above-mentioned detection is performed.
The means detects that there is no document,
If it is detected again that there is a document in the
And the rear end. Therefore, the operation of the detection means
Monitor the time and based on the specified time
Make sure to distinguish the end and the front and rear ends of the hole.
In addition to being able to
It can be easily configured.

According to the present invention, on the conveying path of the conveying means.
The presence or absence of the detection means provided Consequently document near the entrance
And the determination means based on the detection result of the detection means.
The leading and trailing edges of the original, and the leading and trailing edges of the holes.
And the rear end. Therefore, due to the holes in the document
It is possible to prevent malfunction of the device. Also, the detection
If the means detects that there is no document,
The feeding unit starts feeding the next document,
The next document starts feeding regardless of whether it is a hole or the trailing edge of the document.
It Therefore, it is possible to distinguish between the trailing edge of the document and the trailing edge of the hole.
Since the waiting time due to
You can improve your strength.

According to the present invention, information representing the reading range
Input means for inputting, and inputting by the setting means
The reading range based on the information input by the means.
It Therefore, enter the information that represents the reading range.
Since the reading range is set with, it is easy to set the reading range.
It can be carried out.

According to the invention, the input means is
Enter the information indicating the range of operation by the operator's operation.
Receiving input via input mode or communication line
Enter in at least one of the modes
It is configured as For this reason, the reading range is
Parameters can be easily set on the device or by remote control.
And / or easy configuration
You can do it .

According to the present invention , the leading and trailing edges of the document are set by the setting means as the reading start position and the reading end position, respectively. Therefore, the range from the leading edge of the document to the trailing edge of the document is set as the reading range, so that the image information from the leading edge of the document to the trailing edge of the document can be reliably read. According to the present invention , when the document has a hole that can be detected by the detection means, the leading end of the document is set as the reading start position by the setting means, and the leading or rear end of the hole of the document closest to the trailing end of the document is set. The edge is set as the reading end position. Therefore, the image information from the leading edge of the document to the hole is read, and the information from the hole to the trailing edge of the document is excluded as unnecessary information. Therefore, it is possible to efficiently read the image information and improve the processing capability.

According to the present invention , when the document has a hole that can be detected by the detecting means, the setting means sets the leading or trailing edge of the hole of the document closest to the leading edge of the document as the reading start position. The trailing edge of the document is set as the reading end position. Therefore, the image information from the hole to the trailing edge of the document is read, and the information from the leading edge of the document to the hole is excluded as unnecessary information. Therefore, it is possible to efficiently read the image information and improve the processing capability.

According to the present invention , when the document has a hole which can be detected by the detection means, the setting means sets the leading or trailing edge of the hole of the document closest to the leading edge of the document as the reading start position. The leading or trailing edge of the document hole closest to the trailing edge of the document is set as the reading end position. Therefore, the image information between the holes closest to the leading edge and the trailing edge of the document is read, and the rest is excluded as unnecessary information. Therefore, it is possible to efficiently read the image information and improve the processing capability.

According to the present invention , the setting means is the first
Mode, the second mode, the third mode, and the fourth mode, and when the document has a hole that can be detected by the detection unit, the setting unit selects one of the first to fourth modes. It is configured such that any one of them is selected and set. Therefore, the optimum mode can be easily selected and set according to the number of holes and the positions of the holes in the document transport direction. Therefore, it is possible to efficiently read the image information and improve the processing capability.

According to [0096] the present invention, the setting means sets the one of the first to fourth mode <br/> de on the basis of information input by said input means. Therefore, it is possible to easily set the optimum mode suitable for the document.

[Brief description of drawings]

FIG. 1 is a diagram showing a preferred embodiment of an image reading apparatus according to the present invention, and is a sectional view showing a main part thereof.

FIG. 2 is an enlarged sectional view showing a main part thereof.

FIG. 3 is a system configuration diagram of the image reading apparatus shown in FIGS. 1 and 2.

FIG. 4 is a block diagram showing a configuration of the image reading apparatus shown in FIG.

FIG. 5 is a timing chart showing the operation of feeding the next original by the paper feed motor 29 of the automatic original feeding unit 2.

FIG. 6 is a diagram showing a reading range in each reading mode.

FIG. 7 shows the paper feed sensor 3 when the reading mode is the normal mode.
FIG. 6 is a diagram showing an operation of detecting a reading range of a document based on the output signal of FIG.

FIG. 8 is a diagram showing an operation of detecting a reading range of a document when the reading mode is a rear end hole mode.

FIG. 9 is a diagram showing an operation of detecting a reading range of a document when the reading mode is the front end hole mode.

FIG. 10 is a diagram showing an operation of detecting a reading range of a document when the reading mode is a double-sided hole mode.

FIG. 11 is a diagram showing the relationship between the output signal of the paper feed sensor 32 and the count numbers of the first, second, and third timers in the double-sided hole mode, and FIG. When there is only one, FIG. 11 (b) shows the case where the document has two holes.

FIG. 12 is a flowchart showing an operation of the reading unit 1.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 reading unit (reading unit) 2 automatic document conveying unit ( conveying unit ) 3 system control unit (setting unit, determination unit, reading operation control unit, input unit) 4 document presence / absence detection unit 5 operation display unit (input unit) 6 RCU 7 Video Adapter 8 IEU 9 DCU 10, 11 Contact Glass 12 Irradiation Lamps 13, 14, 15 Mirror 16 Condensing Lens 17 CCD Image Sensor 18 SBU 19 Traveling Motor 20 Paper Feed Tray (Document Placement Table) 21 Pickup Roller 22 Registration Roller Pair 23 Conveying drums 24, 25, 26 Idle rollers 27, 28 Discharging rollers 29 Paper feeding motor 30 Conveying motor 31 Discharging tray 32 Paper feeding sensor (detection means) 33 Reading start sensor 34 Discharging sensor 40 MBU 41 AHP 42 A / D converter 50 SCU 51 CPU 52 EPROM 53 EPROM 54 RAM 55 SIPT 56,57,58,62 selector 59 SBC 60 DRAM 61 SIMM 63 SCSI controller 70 ADU 80,81,82,83,84,85 connector pair

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03G 15/00 107 B65H 7/02 G03B 27/62 G03G 21/00 370-512 H04N 1/00 108

Claims (10)

(57) [Claims] 1. A reading unit for reading image information of a document conveyed to a predetermined reading position, a document placing table on which a document bundle of a plurality of documents can be placed, and a document placed on the document placing table. were fed one by one, transportable enter City, the fed document to the reading position, conveying means for unloading from the reading position of the original image information is read by the reading means, the said conveying means Located upstream of the scanning position in the transport direction
It is installed on the transport path where it is placed and is loaded by the transport means.
Detecting means for detecting the presence or absence of a document to be printed, and a document having a hole based on the detection result by the detecting means.
The leading and trailing edges, and the leading and trailing edges of the holes in this document.
And a rear end, and a document having the hole based on the result of the determination by the determination unit.
The reading start position and the reading end position in the transport direction with respect to
Based on the setting means for setting the reading range to be represented and the reading range set by the setting means ,
Before the document with the hole that has been loaded into the reading position
Reading for controlling start and end of reading operation of the reading means
An operation control means, and after the leading edge of the document is discriminated by the discriminating means,
If the detector detects that there is no document,
The transport means starts feeding the next document.
That the image reading apparatus. 2. After the presence of a document is detected by the detection means, the determination means,
When the detection unit detects that there is no document for a predetermined time or more, it is determined that the document is at the trailing edge, and after the determination unit determines the document at the trailing edge, the detection unit detects that there is the document. In the case where the leading edge of the original is determined and the leading edge of the original is determined by the determination means, the absence of the original is detected by the detection means, and the presence of the original is detected again within the predetermined time. 2. The image reading device according to claim 1, wherein the image reading device determines that the hole is a document hole. 3. An input device for inputting information indicating the reading range.
A step, and the setting means inputs from the discrimination means to the input means
Changing the destination, based on the information input by the input means,
The reading range is set, or the reading range is set.
The image reading apparatus according to claim 2 . 4. The information indicating the reading range by the input means.
Operation mode in which the operator inputs
Or at least the reception mode input via the communication line
The contract is characterized by inputting in either mode.
The image reading device according to claim 3 . 5. The setting means sets a leading edge and a trailing edge of a document.
As the reading start position and the reading end position, respectively.
It is set according to claim 1 to claim 4
The image reading device according to any one of claims . 6. The setting means detects the original by the detecting means.
If there is a hole that can be detected,
As well as the document closest to the trailing edge of the document.
Set the leading or trailing edge of the hole as the scanning end position.
The image reading device according to claim 5. 7. The setting means detects the original by the detecting means.
If there is a hole that can be detected,
If you set the leading or trailing edge of the
In both cases, set the trailing edge of the document as the scanning end position.
The image reading device according to claim 5 . 8. The setting means detects the original by the detecting means.
If there is a hole that can be detected,
If you set the leading or trailing edge of the
Both the front or rear of the document hole closest to the rear edge of the document.
Claim to set the end as the reading end position
Item 5. The image reading device according to item 5 . 9. The setting means sets a leading edge and a trailing edge of a document.
As the reading start position and the reading end position, respectively.
The first mode to be set by setting the
Scan the leading or trailing edge of the document hole closest to the trailing edge of the draft.
The second mode, which is set as the end position, and the leading or trailing edge of the document hole closest to the leading edge of the document.
Set it as the start position, and set the
The third mode, which is set as the end position, and the leading or trailing edge of the document hole that is closest to the leading edge of the document.
Set it as the start position and place it closest to the
Set the leading or trailing edge of the hole of the original to be the scanning end position.
And a fourth mode which is set to the original by the detecting means.
If there is a detectable hole, the first to fourth modes
Claims characterized by selecting and setting any one of
Item 5. The image reading device according to item 5 . 10. The setting means inputs the input by the input means.
Of the first to fourth modes based on force information
The image according to claim 9, wherein any one of them is set.
Reader .