JP2003134305A - Image reading apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reading apparatus which can accurately read a double-sided original by only the necessary minimum input from an operation panel, while imparting flexibility in a setting state of the original to the image reading apparatus when the original is read. SOLUTION: When a binding position of the double-sided original is a long side and it is determined that the length of the original for subscanning is longer than that of main scanning, the image of the read backside of the original is rotated. When a binding position of the original is a short side and it is determined by the length of the original comparing means that the length of the original for the main scanning is longer than that of the subscanning, a backside image of the manuscript which is read by a reading means is rotated.

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 capable of reading both sides of a document by reversing and feeding the document.

[0002]

2. Description of the Related Art Conventionally, an original having both sides printed is read as a single-sided original and a copy of the single-sided original is obtained from the double-sided original.
Or, when you want to send the scanned document to a facsimile terminal on the telephone line using a communication device, or send the scanned image to a computer for image processing,
An image reading device is used. However, when scanning one side of the document and then the other side of the document, if you want to stop the document transport once and reverse the transport direction and scan it again with the document scanning scanner, use the binding position of the two-sided document. In some cases, the image on one side of the document is upright or inverted with respect to the image on the other side. Therefore, when one side is read, if this is taken into consideration and the processing is not performed, the result will be different from the reading expected by the user, and reading failure will occur.

As described above, when a double-sided original is read by the reading device, it is necessary to read one side of the original in consideration of the binding position. Specifically, when a double-sided original is set on the image reading apparatus and reading is started, the binding position is set to a predetermined position and set. Alternatively, how the double-sided original is set in the image reading apparatus is input from the operation panel. In this case, the binding position of the double-sided document, the setting state of the double-sided document on the image reading device, and the like are input, and from this input result, it is determined how to process one side of the double-sided document and the processing is performed.

[0004]

However, in the case of a device for reading the images on both sides of the document so that the directions of the images on both sides of the document match by setting the binding position of the document at a predetermined position with respect to the image reading device, There is a problem in that the document may be set without knowing it, or may be set by mistake and the directions of the images on both sides of the document do not match. Also, in the case of a device for reading the originals on the operation panel so that the directions of the images on both sides of the original match by setting from the operation panel, the binding position of the double-sided original and the image reading Since it was necessary to set multiple conditions such as inputting the setting status of double-sided originals to the device and judge what kind of processing should be performed based on these multiple conditions, the setting itself is awkward and input errors are made. There is a problem that it is apt to occur and that it cannot be read normally, and at the same time, there is a problem that the processing takes time and burdens the apparatus. In view of the above-described circumstances, the present invention provides a double-sided original with a minimum required input from the operation panel while allowing the image reading apparatus to have a degree of freedom in setting the double-sided original when reading both sides of the original. An object of the present invention is to provide a document reading device that can accurately read a document.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and the invention according to claim 1 is an image reading apparatus for reading a double-sided original, and a reading means for reading the double-sided original as an image. A document feeding unit for feeding the double-sided document, a document length comparing unit for comparing the document lengths of the document in the main scanning direction and the sub-scanning direction, and a storage unit for storing the image read by the reading unit. Rotating means for rotating the image on one side of the document stored by the storage means by 180 ° relative to the image on the other side, and whether the binding position of the document is on the short side or the long side. When the binding position designating means to be designated and the binding position designated by the designating means are long sides, and the document length comparing means determines that the document length in the sub-scan is longer than the document length in the main scan. , Read above The image on one side of the original read by the means is rotated by the previous rotation means, the binding position designated by the designation means is the short side, and the original length comparison means performs main scanning from the original length of the sub-scanning. If it is determined that the original length is long, the instruction means for instructing the rotating means to rotate the image on one side of the original read by the reading means by the rotating means, and the rotating means. It is provided with an output means for outputting the rotated image as needed.

According to the first aspect of the invention thus constructed, a binding position designating means for designating whether the binding position of the double-sided original is on the short side or the long side is provided, and the user binds to the binding position designating means. Specify whether the position is the short side or long side of a double-sided original. When the image reading is started, the two-sided document is fed by the document feeding means, and the document length comparison means compares the document lengths in the main scanning direction and the sub-scanning direction. As a result, when it is determined that the binding position is on the long side and the sub-scan is longer than the main scan of the double-sided original, the image on one side of the read original is rotated. Further, when it is determined that the binding position is on the short side and the main scanning is longer than the sub-scanning of the double-sided original, the image on one side of the read original can be rotated. .

According to a second aspect of the invention, in the image reading apparatus according to the first aspect, the output destination for outputting the image from the output means is an image communication means for transmitting the image to an external receiving device via a telephone line. Is an image reading device. The invention according to claim 2 configured as described above has an effect that an image output from the output means can be transmitted to an external receiving device.

According to a third aspect of the invention, in the image reading apparatus according to the first aspect, the output destination for outputting the image from the output means is a recording means for recording the image. The third aspect of the invention thus configured has the effect of being able to record the image output from the output means.

According to a fourth aspect of the invention, in the image reading apparatus according to the first aspect, the output destination for outputting the image from the output means transfers the image read by the reading means to the image processing apparatus. Is an image reading device which is an interface. Claim 4 constituted in this way
The described invention has an effect that the image output from the output means can be transferred to the image processing apparatus.

According to a fifth aspect of the present invention, there is provided an image reading method of feeding a double-sided original and reading both sides of the original,
As a result of comparing the document lengths in the main scanning direction and the sub scanning direction of the document, if the main scanning length is longer than the sub scanning length and the binding position of the document is the long side, one side of the read double-sided document If the image is rotated or the document lengths of the document in the main scanning direction and the sub scanning direction are compared, and the sub scanning length is longer than the main scanning length and the binding position of the document is the short side, This is an image reading method in which an image on one side of a read double-sided original is rotated. Claim 5 constituted in this way
According to the described invention, it is necessary to rotate the image on one side of the read double-sided original depending on whether the main scanning length is compared with the sub-scanning length and the binding position of the original is the long side. It has an effect that it is possible to accurately determine whether or not.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The image reading apparatus of this embodiment is applied to a facsimile machine. FIG. 1 is an explanatory diagram showing the configuration of the facsimile system according to the present embodiment. A document reading unit 50 for reading a document is arranged above the image reading device. This document reading unit 50
Is a document feeding unit 1 that supports documents, or conveyance rollers 2 and 3 that feed the documents one by one from the document feeding unit and convey the documents to the document reading scanner 10. Conveying rollers 8 and 9 that discharge the read documents. The document discharge section 30 is provided. Although not shown, a transport direction switching unit is provided at various points along the transport path and is controlled so as to switch the transport direction as necessary. Further, the document reading unit 50 is provided with a paper width sensor 29 for detecting the current paper width and a paper length sensor 28 for detecting the length of the document, and determines the size of the paper conveyed to the document reading scanner 10. It is possible to automatically read and determine. As the paper width sensor, a light transmission type sensor or a light reflection type sensor is often adopted, and a plurality of the paper width sensors are arranged at positions corresponding to various paper sizes to detect the paper width. Many mechanical sensors are used as the paper length sensor, and it is possible to calculate the paper length from the time from the detection of the leading edge of the paper to the detection of the trailing edge of the paper and the transport speed. It is configured. The sheet length sensor 28 can also function as a sheet jam sensor, and when it is detected that there is a sheet longer than the transport time corresponding to the maximum sheet length of sheets that can be processed by the image reading apparatus. On the other hand, it is possible to judge that a paper jam has occurred and inform the operator of that fact.

The original reading unit 50 includes a rotary shaft 40.
It is formed so as to be rotatable around. By opening the document reading unit 50 around the rotary shaft 40, it is possible to place the document on the document table 41 located below the document reading unit 50 and read the document by the document reading scanner 10. ing. Although not shown, at least two sensors having the same functions as the paper width sensor 29 and the paper length sensor 28 are arranged on the document table 41, and the paper size of the document placed on the document table is automatically determined. It is possible to detect it in a positive manner. When reading a document placed on the document table, the document reading scanner 10 scans the document placed on the document table 41 by scanning from left to right in FIG. 1, for example. It is also possible to speed up the reading process by calculating the scanning amount of the document reading scanner from the document size automatically detected at this time to prevent the document reading scanner from performing a reading operation to an unnecessary reading area. .

At the bottom of the image reading device, a paper feed cassette 3 is provided.
3, 34 are arranged, and are fed by the feed rollers 13 and 14, respectively, and are fed to the central portion of the apparatus by the feed rollers 15, 16, 17, 18, 31 and 32 provided on the feed paths 25 and 26. An image is recorded on the recording paper fed / conveyed from these paper feed cassettes by the image forming unit 12 arranged in the central portion of the apparatus. By arranging the paper feed cassettes 33 and 34 and a plurality of paper feed cassettes as in this embodiment, a plurality of types of recording papers can be stored, and when recording on various sizes of recording papers, the operator can load the papers. It is possible to omit the time and effort for exchanging the recording medium, which in turn shortens the recording time. If you want to record a large number of images on recording paper of the same size, store paper of the same size in both paper feed cassettes so that you can record a large amount of images without the need to replenish the paper. Is also possible. In the embodiment, this paper feed cassette has two stages, but it is clear that the convenience of further use is improved by adding more paper feed cassettes, and the number of paper feed cassettes is limited to two stages. Not a thing.

At the center of the image reading device, a paper feed cassette 3 is provided.
An image recording unit 12 for recording an image on the recording paper conveyed from 3, 34 is arranged. In this embodiment, the image recording unit 12 uses an electrophotographic system. Image recording unit 1 that uses electrophotography
2, a photosensitive drum 50, a developing device (not shown),
It is composed of a charging device, a transfer device, an optical device, etc., and is configured to form an image on a recording sheet.

The procedure for forming an image on a recording sheet is as follows. The photoconductor drum is uniformly charged by the charger. After this, the optics partially exposes the charged drum according to the read image information. The toner supplied by the developing device is transferred to the photosensitive member only on the partially exposed portion to form a toner image. This toner image is transferred onto the recording paper by the transfer device.

The image recording unit 1 in the central portion of the image reading device
A fixing unit 35 and conveying rollers 21, 22, 23, and 24 are further arranged downstream of the sheet conveying direction of 2. The fixing unit 35 is for fixing the toner image transferred onto the recording sheet by the image recording unit 12 as a permanent image on the recording sheet by melting the toner image by heat and soaking into the fibers of the recording sheet. For this purpose, the fixing unit is provided with a fixing roller 19, a press roller 20, a heater tube (not shown), a temperature detector, a peeling claw, and the like. The fixing roller 19 is generally made of a hollow aluminum roller having good heat conductivity, and is heated by a heater tube disposed in the roller so that the fixing roller 19 has a temperature at which the toner can be melted. Controlled by. For this temperature control, the temperature of the fixing roller is detected by a temperature detector arranged close to the heater tube, and the power supplied to the heater tube is turned on / off based on a signal from this detector to keep the temperature at a predetermined temperature. It is like this. At the same time that the toner is melted by the fixing roller, the toner that is melted by the press roller 20 that is in pressure contact with the fixing roller and is rotatable is impregnated into the recording paper to record a toner image as a permanent image. Stick to paper. The peeling claw is arranged so as to come into contact with the fixing roller by an elastic body, and has a function of peeling the recording sheet after fixing from the fixing roller 19 so that the recording sheet is not peeled off from the fixing roller and jammed to prevent jamming. ing.

Conveying rollers 21, 22, 23, and 24 are arranged downstream of the fixing unit 35 in the sheet conveying direction, and eject the fixed recording sheet to a sheet tray 36 outside the apparatus. Further, a paper sensor is arranged downstream of the fixing unit 35 in the paper conveyance direction, and when the presence of paper is detected for a set time or longer, it is determined that a paper jam has occurred and the supply of electricity to the fixing unit 35 is stopped. It is supposed to do.

A control unit 4 is further provided at the center of the image reading device.
2 are arranged to perform various controls of the image reading apparatus and data processing. Among them are a modem for connecting to a telephone line, a communication control section for controlling this modem, an image processing section for processing an image read by an image reading unit, an image storage section for storing the processed image, and an external device. There is provided an external interface unit and the like for making the connection. An operation panel 11 for an operator to operate the image reading apparatus is provided outside the apparatus, and various settings and operations can be performed. The operation panel 11 includes at least one or more operation buttons, a liquid crystal display, LEDs,
If a device such as a paper jam occurs, a speaker etc. can be used to check the status of the device and various settings, and it is possible to notify the occurrence of the error with an LED or speaker. Has become. There is also an instruction to read a double-sided original into a single-sided original using the operation panel. Instructions and instructions from the operation panel are discriminated by the control unit 42, and each step of processing according to the instruction is executed.

FIG. 2 is a block diagram showing the electrical construction of the image reading apparatus. The image reading unit 100 scans a document conveyed by the document reading unit one by one or a document placed on a document table by a document reading scanner to convert the document data into read image data. Image recording unit 11
0 is for recording the image data read by the image reading unit 100 as a visible image on a recording sheet. The image storage unit 120 reads image data read by the image reading unit 100, image data received from an external device via the external interface unit 170, image data transmitted / received to / from a facsimile device in a remote place via a telephone line from the communication control unit. Is to remember. Operation unit 140 and display unit 15
0 displays the state of the device and setting information to the operator, accepts input from the operator, and can change various settings of the device. The communication control unit 160 is the operation unit 1
It controls the facsimile transmission on the telephone line according to the telephone number input from 40, and controls so as to receive the transmitted facsimile signal in response to a call from the telephone line. The external interface unit is connected to an external device such as a personal computer and controls communication for receiving commands and data from the external device and for responding to commands and transmitting data to the external device. Then, the main arithmetic processing unit 200 comprehensively controls these units. In the communication control unit 160, a modem for converting digital data sent from a personal computer into a voice signal and flowing the voice signal to a telephone line, or converting a voice signal heard through the telephone line into digital data. 180 is provided and functions to send and receive data through a telephone line via an NCU (network control unit) 190 that sends a dial signal to call a communication partner in order to connect a computer to a public communication network. It is supposed to do.

FIG. 3 is an explanatory view showing the state of conveyance when the original reading unit reads only one side of the original. As already described with reference to FIG. 1, the conveyance rollers 200 and 201 for feeding and conveying the document from the document feeder and the document conveyed to the document reading scanner 204 can be conveyed while closely contacting each other. The roller 202 and the conveying rollers 203 and 221, which are used when reading both sides of the original and are controlled so that they can be rotated in the forward and reverse directions as needed, the conveying direction switching unit 210, and the conveying paths 220 and 224 constitute an original reading unit. is doing.

Next, the state of conveyance when reading only one side of a document will be described. First, the originals stacked in the original feeding section are conveyed one by one by the conveying rollers 200 and 201. Then, the document being pressed and conveyed by the conveyance roller 202 in the middle of the conveyance path is read as image data by the document reading scanner 204. In the case of reading only one side of a document, the conveyance direction switching unit 21
0 is switched so that the conveying path 221 is made effective from the conveying path 220, and the conveyed document is conveyed by the document discharge section 3
Induce to 0.

FIG. 4 is an explanatory view showing the state of conveyance when reading both sides of the document by the document reading unit. a
From the state of 2 to the state of b and the state of c is read on both sides. The conveying rollers 252 and 251 and the conveying roller 252, which is capable of conveying while adhering the double-sided original conveyed to the original reading scanner 254, and used when reading both sides of the double-sided original, can be rotated in the forward and reverse directions as necessary. The configurations of the controlled transport roller 253, the transport direction switching unit 260, and the transport paths 270 and 274 are the same as those in FIG.

The state of conveyance when reading both sides of a double-sided original will be described with reference to FIG. As in the case of reading one side of a double-sided original, the double-sided originals stacked in the original feeding section are conveyed one by one by the conveying rollers 250 and 251.
Then, the double-sided original document being conveyed by being pressed against the document reading scanner 254 by the conveyance roller 252 being conveyed is conveyed while being read as image data. The transport direction switching unit 260 moves from the transport path 270 to the transport path 27.
The double-sided original, which has been switched so that 1 is valid and has passed through the original reading scanner, is conveyed through the conveying path 271.
When the rear end of the double-sided original is conveyed as it is and is pinched by the conveyance rollers 253 and 255, the conveyance is temporarily stopped,
The rotations of the transport roller 253 and the transport roller 255 are reversed. During reverse rotation, the transport switching unit 260 is switched so that the transport path 274 is enabled and is transported to the reverse transport roller, and the double-sided document is transported through the transport path 274. The image data of the double-sided original is read again by the original reading scanner. At this time, the surface opposite to the original surface read first is read. At this time, the orientation of the double-sided original in the conveyance direction is 180 when the original is read by the original reading scanner and the back of the original is read.
It is spinning. Therefore, it is necessary to change the processing of the read image data on the back surface of the document based on the result of comparing the lengths of the main scanning and the sub-scanning of the double-sided document in the binding position of the double-sided document and the transport direction.

When the back side of the document is read, the transport direction switching unit 260 brings the transport route 270 to the transport route 271 in an effective state, the double-sided document is transported through the transport route 271, and the double-sided document is ejected to the document ejecting unit. Scanning on both sides is complete. If multiple double-sided documents are placed in the document feeder,
Then, the double-sided original on the next page is read.

FIG. 5 is an explanatory view showing the state of the document data read by the image reading scanner according to the binding position and the conveyance direction of the double-sided document. In FIG. 5, the conveyance direction of double-sided originals is uniformly from right to left. The characters on the paper represent the character direction in each double-sided original. An arc at the end of the document represents the binding position. In each of the states from a to d, the left-side paper represents the read front-side document data, and the right-side paper represents the back-side original data. The length of the side corresponding to the leading edge or the trailing edge of the double-sided document in the document feeding direction is called the main scanning length, and the length of the side forming a right angle with the leading edge or the trailing end of the double-sided document is called the sub-scanning length.

Description will be given starting from the state of FIG. “A” represents a conveyance state when the binding position is on the long side of the double-sided document and the main scanning length is longer than the sub-scanning length. In this case, the read image data on the front side of the document becomes like the left image, and the read image data on the back side of the document becomes like the right image. Therefore, both sides of a double-sided original can be read without the need to rotate the image data on the back side of the original. b
The state (2) represents the conveyance state when there is a binding position on the long side of the double-sided original and the sub-scan length is longer than the main-scan length. In this case, the read image data on the front side of the document becomes like the left image, while the read image data on the back side of the document becomes like the right image. In this case, the image on the back is 180
° Need to rotate. The state c represents the conveyance state when the main scanning length is longer than the sub scanning length while the binding position is on the short side of the double-sided document. In this case, the read image data on the front side of the document becomes like the left image, while the read image data on the back side of the document becomes like the right image.
In this case, the image on the back side needs to be rotated by 180 ° in the same image direction as the image on the left. The state of d represents the conveyance state when the binding position is on the short side of the double-sided document and the sub-scan length is longer than the main-scan length. In this case, the read image data on the front side of the document becomes like the left image, and the read image data on the back side of the document becomes like the right image. Therefore, both sides of a double-sided original can be read without the need to rotate the image data on the back side of the original.

From the above, by specifying the binding position and the conveying direction of the double-sided original, the processing of the image data of one side of the double-sided original read by the original reading unit is relatively rotated by 180 ° or necessary. It is possible to accurately judge whether there is any. Actually, when the binding position of the double-sided document is on the long side as in the state of b in FIG. 5 and it is determined that the document length in the sub-scan is longer than the document length in the main scan, It is necessary to rotate the image on the back side of the document by the reading unit by 180 °. Similarly, in the case where the binding position of the double-sided original is on the short side as in the state of c in FIG. It is necessary to rotate the image on the back side of the document by 180 °. By processing in this manner, the front and back directions of the read double-sided original image can be matched.

On the other hand, when the main scanning length is longer than the sub-scanning length with the binding position on the long side of the double-sided original as in the state of FIG. 5A, or in the state of FIG. 5D, When the binding position is on the short side of the double-sided original and the sub-scan length is longer than the main-scan length, it is not necessary to rotate the image on the back surface of the read original. To summarize these, when the binding position of the specified double-sided original is on the long side, it is determined that the sub-scanning original length is longer than the main-scanning original length, and when the specified double-sided original is specified. When the binding position of is on the short side and it is determined that the length of the main scanning original is longer than the length of the sub scanning original, the image on one surface of the original by the original reading unit is rotated by 180 °. By controlling, it is possible to match the front and back directions of the image of the double-sided document. Conversely, even when the specified double-sided document has the binding position on the long side, the sub-scanning length is longer than the main-scanning length, or the specified double-sided document has the binding position on the short side, When the document length in the sub-scanning is longer than the scanning length and short, the image on one surface of the document by the document reading unit does not need to be rotated.

FIG. 6 is a flowchart showing a document reading processing routine. In the image reading apparatus, first, the start of the double-sided reading mode is instructed from the operation panel. Next, similarly, whether the binding position of the double-sided original is the long side or the short side of the paper is input from the operation panel (step S100). The front side of the double-sided document is read and the read front side image is transferred to the image storage unit (step S102). After the front surface of the double-sided original has been read by the original reading unit, the double-sided original is inverted so that the back surface of the double-sided original is read by the original reading unit (step S104). When the reading of the back side of the double-sided document is completed, it is confirmed whether or not the binding position is on the long side of the sheet (step S106). At this time, if the binding position is the long side, the process proceeds to step S107, and if the binding position is not the long side, the process proceeds to step S109. Step S107
Then, the main scanning length and the sub scanning length of the read double-sided original are compared. If it is determined that the main scanning length of the double-sided document is shorter than the sub-scanning length, the process proceeds to step S108, and the image on the back side of the document read in step S104 is set to 180
° Rotate and transfer to image storage unit. Step S
In step S109, the process proceeds to step S109.
The main scanning length and the sub scanning length of the double-sided original read in 109 are compared. When it is determined that the main scanning length of the double-sided document is shorter than the sub-scanning length, the process proceeds to step S110, and the image on the back side of the document read in step S104 is transferred to the image storage unit without being rotated. As a result of comparing the main scanning length and the sub-scanning length of the double-sided original read in step S109, when it is determined that the main-scanning length of the double-sided original is longer than the sub-scanning length, the process proceeds to. The process proceeds to step S108. In step S108, the read back side image is rotated by 180 ° and transferred to the image storage unit. When it is determined in step S107 that the sub-scan length is shorter than the main-scan length, the process proceeds to step S110. In this way, the processing of the double-sided reading mode is completed.

As described above, according to the image reading apparatus of the present embodiment, when the mode for reading a double-sided original printed on both sides as a single-sided original is selected, only the binding position is designated. Is a single-sided original with a uniform image orientation regardless of the conveyance direction or binding position of the double-sided original by comparing the main scan length and the sub-scan length that are automatically recognized when reading the double-sided original. Is possible.

That is, a single-sided original is obtained from a double-sided original, or a read double-sided original is sent to a facsimile terminal of a telephone line using a communication device, or the read image is sent to a computer for image processing. In such a case, the operator only has to indicate whether the binding position of the double-sided original is the long side or the short side of the double-sided original, and the image direction is set regardless of the orientation of the double-sided original in the reading unit. It is possible to obtain a unified image.

[0032]

According to the image reading apparatus of the first aspect of the present invention, the binding position designating means designates whether the binding position of the document is the short side or the long side, and the document feeding means supplies the document. As a result of comparing the document lengths in the main-scanning direction and the sub-scanning direction, when it is determined that the binding position is the long side and the document length in the sub-scanning is longer than the document length in the document main-scanning, the reading unit When it is determined that the image on one side of the original read by the scanner is rotated, the binding position is on the short side, and the main scanning original length is longer than the sub scanning original length, the reading unit Since the image on one side of the read original is rotated, it is possible to obtain a single-sided original having a uniform image direction from the double-sided original simply by designating the binding position.

According to the image reading device of the second aspect, the output destination for outputting the image from the output device is the image reading device which is the image communication device for transmitting the image to the external receiving device through the telephone line. , Images of double-sided originals can be sent to a facsimile machine at a remote place using a telephone line.

According to the image reading apparatus of the third aspect, since the output destination for outputting the image from the output means is the image reading apparatus which is the recording means for recording the image, the image of the double-sided original can be stored. it can.

According to the image reading apparatus of the fourth aspect, the output destination for outputting the image from the output means is the image reading apparatus which is an interface for transferring the image read by the reading means to the image processing apparatus. Because there is
It is possible to transfer an image of a double-sided original to an external device and process the read image.

According to the image reading method of the fifth aspect, the main scanning length is compared with the sub scanning length, and the binding position of the original is determined by whether the long side is the short side or not. Since it is possible to accurately determine whether or not the image on one side needs to be rotated, it is possible to obtain a single-sided original having a uniform image direction from the double-sided original.

[0037]

[Brief description of drawings]

FIG. 1 is an apparatus showing a facsimile apparatus according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a facsimile apparatus according to the present invention.

FIG. 3 is an explanatory view showing a normal conveyance state of a single-sided original of the facsimile apparatus according to the present invention.

FIG. 4 is an explanatory view showing a conveyance state when a double-sided original is read as a single-sided original of the facsimile apparatus according to the present invention.

FIG. 5 is a diagram for studying the processing after reading the back surface of the original depending on the type of double-sided original and the conveying direction.

FIG. 6 is a flowchart of processing of a double-sided reading mode according to the present invention.

[0038]

[Explanation of symbols]

1 Document feeder 11 Operation panel 12 Image forming unit 202 Conveyor roller 204 Original scanner Step 100 (image storage unit) Step 102 (image processing unit) Step 104 (image reading unit) Step 106 (image processing unit) Step 107 (main calculation processing section) Step 108 (image processing unit) Step 109 (main operation processing unit) Step 110 (image processing unit)

Claims (5)

[Claims] 1. An image reading apparatus for reading a double-sided document, a reading unit for reading the double-sided document as an image, a document feeding unit for feeding the double-sided document, and document lengths in the main scanning direction and the sub-scanning direction of the document. A document length comparing means for comparing
Storage means for storing the image read by the reading means; rotation means for rotating an image on one side of the document stored by the storage means by 180 ° relative to the image on the other side; The binding position designating means for designating whether the binding position of the document is the short side or the long side, the binding position designated by the designating means is the long side, and the document length comparing means determines the document length of the main scanning. When it is determined that the document length in the sub-scanning is long, the image on one surface of the document read by the reading unit is rotated by the previous rotation unit, and the binding position designated by the designating unit is the short side. If the document length comparison means determines that the document length in the main scan is longer than the document length in the sub-scan, the image on one side of the document read by the reading means is rotated by the previous rotation. Image reading apparatus characterized by comprising: a command means for commanding said rotating means to rotate, the output means for outputting as necessary image is rotated by the rotating means by. 2. The image reading device according to claim 1, wherein the output destination for outputting the image from the output device is an image communication device for transmitting the image to an external receiving device via a telephone line. 3. The image reading apparatus according to claim 1, wherein the output destination for outputting the image from the output unit is a recording unit for recording the image. 4. The image reading apparatus according to claim 1, wherein the output destination for outputting the image from the output unit is an interface for transferring the image read by the reading unit to the image processing apparatus. 5. An image reading method for feeding a double-sided original and reading both sides of the original, comparing the original lengths in the main scanning direction and the sub-scanning direction, and as a result, the main scanning length is longer than the sub-scanning length. When the binding position of the original is the long side, the image on one side of the read double-sided original is rotated, or as a result of comparing the original lengths of the original in the main scanning direction and the sub-scanning direction,
An image reading method for rotating an image on one side of a read double-sided original when the sub-scanning length is longer than the main-scanning length and the binding position of the original is the short side.