JPH0637997A - Document reader - Google Patents

Abstract

PURPOSE:To reduce the excess burden on an operator and to shorten the time required to perform transmission. CONSTITUTION:Picture reading sensors 8 and 9 are provided on the upper and lower surfaces of an original passing section. A picture memory storing the data read at the lower side or at the upper side being the other surface while outputting the picture data which is read at the upper side or at the lower side being one side of the original passing section is provided. Thus, the picture reading can be performed by one scanning per original written on both sides.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a document reading device, and more particularly to a document reading device in a facsimile machine. For example, it is applied to a digital PPC or a facsimile machine.

[0002]

2. Description of the Related Art In a conventional facsimile apparatus, when transmitting a document with images printed on both sides, first, one side of the document is irradiated with light and the reflected light is photoelectrically converted to encode an image signal. Modulate and modulate and transmit over line. Then, the other side of the original document is similarly transmitted and the transmission of the original document is completed. However, since such a conventional facsimile apparatus can read only one side of a document,
When it is desired to send a two-sided original, it has a drawback that it takes a lot of work because a copy is made once for each side and then sent by facsimile, or the front side of the original is sent and then the back side is sent.

In order to solve this problem, for example, a "facsimile apparatus" disclosed in Japanese Patent Laid-Open No. 2-31077 has a first and second original reading section and a memory section for the front and back sides of a transmission original. The transmission original data stored in the respective memory units are alternately read out, re-stored in the third memory unit in page order and transmitted. As described above, when scanning a document written on both sides, the conventional one first scans one side, and then scans the remaining one side again, or prepares a two-sided document on each side in advance. Documents to be scanned after copying, or reading sensors provided above and below the document reading unit, select both sides or one side of the document and send it.
Alternatively, there is a copy, but according to this, it is necessary to select in advance whether the original is double-sided or single-sided.

[0004]

[Purpose] The present invention has been made in view of the above-mentioned circumstances, and is intended to reduce wasteful labor of an operator, shorten the time required for transmission, and reduce the time required for copying.
It is an object of the present invention to provide a document reading apparatus that reduces both time and labor by copying both sides by one scanning operation.

[0005]

In order to achieve the above object, the present invention provides (1)
In a document reading device having a first image reading sensor provided on the upper surface side of the document passing portion and a second image reading sensor provided on the lower surface side of the document passing portion, an upper surface side which is one surface of the document passing portion. Or encode the image data read on the bottom side
An encoding / decoding unit for decoding, a plotter unit for outputting the image data, and an image memory capable of accumulating the data read by the other surface of the document passing unit are provided, and further, (2) The document being read reaches the reading end position on the upper surface side or the lower surface side of the document passing portion, and the first page (front side)
When the output of the image data of (2) is completed, the software that can automatically output the image data of the other stored second page (back side) to the encoding / decoding unit or the plotter unit is provided. 3) A processing circuit capable of automatically determining whether the original is a double-sided original or a single-sided original based on the image data read on the upper surface side and the lower surface side of the original passing portion, and processing only the side having the image data as the image information when the original is the single-sided original. Alternatively, it is characterized by having software. Hereinafter, description will be given based on examples of the present invention.

1A and 1B are structural views for explaining an embodiment of a document reading apparatus according to the present invention. FIG. 1A is a plan view and FIG. 1B is a side view. . In the figure, 1 is step data, 2 is a front platen roller, 3 is a back platen roller, 4 is a pinion gear, 5 is a front platen gear, 6 is a back platen gear, 7 is an intermediate gear, 8
Is a front side reading unit, 9 is a back side reading unit, 10 is a document sensor, and 11 is a document. The conveyed document 11 is detected by the document sensor 10 and conveyed to the reading start position. The document 11 is conveyed by driving the front platen gear 5 and the back platen gear 6 from the pinion gear 4 by the step motor 1. The front side of the document is read by the front side reading unit 8, and the back side of the document is read by the back side reading unit 9. That is, the first image reading sensor 9 is provided on the upper surface side of the document passage portion, and the second image reading sensor 8 is provided on the lower surface side.

FIG. 2 is a system block diagram of a document reading apparatus according to the present invention. In the figure, 12 is a paper sensor, 13 is a scanner, 14 is a plotter, 15 is an operation display unit, 16 is an image memory, and 17 is communication control. Section, 18 is a modem, 19 is a network control section, 20 is an encoding / decoding section, 21 is a CPU (central processing unit), 22 is a ROM (Read Only Memory), 23
Is a RAM (Random Access Memory).

A CPU (Central Processing Unit) 21 performs control processing of each section of this facsimile apparatus and facsimile transmission control procedure processing. ROM22 is CPU
The RAM 23 stores a control processing program executed by the CPU 21, various data necessary for executing the processing program, and the like, and the RAM 23 constitutes a work area of the CPU 21. The scanner 13 is for reading an original image at a predetermined resolution, the plotter 14 is for recording and outputting an image at a predetermined resolution, and the operation display section 15 is for various operations for operating this facsimile apparatus. It consists of operation keys and various displays.

The encoding / decoding section 20 is for encoding and compressing the image signal and for decoding the encoded and compressed image information into the original image signal.
Is for storing a large amount of image information in a decoded and compressed state. The communication control unit 17 processes the image information into a communication protocol control or a mode determined by the protocol.
The modem 18 is for modulating the image data decoded by the encoding / decoding unit 20 and demodulating the image data received from the line. The network control unit 19 is for the line and the modem 18, and the telephone. It is for switching the connection with the line. With such a configuration, the image data read on the upper surface side or the lower surface side, which is one surface of the document passing portion, is output to the encoding / decoding portion 20 or the block 14 while the other surface (the image data The data read on the side opposite to the reading side is stored in the image memory 16.

FIG. 3 is a flow chart for explaining the operation of the document reading apparatus according to the present invention. step 1 : When the document reaches the reading start position, reading of data on the front and back sides of the document is started by the upper and lower reading sensors. The read data is stored in the memory A on the front side and in the memory B on the back side. step2 : When the document passes the reading end position, the reading is finished and the content of the data accumulated in the memory B is checked. As a result of the check, if the data is regarded as blank data, the contents of the memory A are automatically output to the encoding / decoding unit or the plotter unit. step3 : If the contents of memory B are valid, then memory A
Check the contents of. At this time, if the contents of the memory A are regarded as blank data, there is a possibility that the front and back of the one-sided original was read in reverse, so only the contents of the memory B are similarly output. step4 : If the contents of the memory A are valid, the contents of two pages are sequentially read from the front side to the back side in order of memory A → memory B
Is output.

[0011]

As is apparent from the above description, the present invention has the following effects. (1) Effect corresponding to claim 1: In the document reading device having the reading sensors on the upper surface side and the lower surface side of the document passing portion,
Easy to operate because you can use double-sided originals as they are,
Further, since the front side is read and the data on the back side is accumulated during output and the data for two pages on the front side and the back side can be completed by one scanning, the time required for reading can be shortened. That is, when reading the contents of a document written on both sides, both sides can be read by scanning once for each document, which makes it possible to simplify the operation when transmitting a two-sided document. . (2) Effect corresponding to claim 2: After outputting the surface data,
In an apparatus capable of automatically outputting back side data, two pages of originals can be continuously transmitted or copied.
For example, instead of retransmitting the second page (back side) after the first page (front side) has been transmitted,
Multiple pages can be sent, and waste of operation can be eliminated. (3) Effect corresponding to claim 3: In an apparatus that outputs after judging one side from both sides of a document, when the operator performing transmission mistakes the front side and the back side of the one-sided document, the automatic transmission is automatically performed. Since a surface having image data is selected and transmitted, reliable transmission is possible. Also, when sending a multi-page original, even if a double-sided original and a single-sided original are mixed in, the double-sided original will send both sides and the single-sided original will send the side with image data, so the operator can easily and securely The send operation can be performed. That is, in order to determine whether the original is a double-sided original or a single-sided original, when a double-sided original and a single-sided original are mixed, if this is read in multiple, the back side of the single-sided original is also read as image data in the conventional method. However, such waste can be eliminated.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of a document reading apparatus according to the present invention.

FIG. 2 is a system block diagram of a document reading apparatus according to the present invention.

FIG. 3 is a flowchart for explaining the operation of the document reading apparatus according to the present invention.

[Explanation of symbols]

1 ... Step data, 2 ... Surface platen roller, 3 ...
Back side platen roller, 4 ... Pinion gear, 5 ... Front side platen gear, 6 ... Back side platen gear, 7 ... Intermediate gear, 8 ... Front side reading section, 9 ... Back side reading section, 10 ... Original document sensor, 11 ... Original.

Claims (3)

[Claims] 1. A document reading apparatus having a first image reading sensor provided on an upper surface side of a document passing section and a second image reading sensor provided on a lower surface side of the document passing section in one of the document passing sections. Data that has been read on the other side of the document passing section, a coding / decoding section that encodes / decodes the image data that is read on the upper surface side or the lower surface side that is the surface, a plotter section that outputs the image data, An original reading apparatus comprising: an image memory capable of storing a document. 2. When the document being read reaches the reading end position on the upper surface side or the lower surface side of the document passing portion and the output of the image data of the first page (front side) is finished, the other one is automatically stored. The document reading apparatus according to claim 1, further comprising software capable of outputting the image data of the second page (back side) to the encoding / decoding unit or the plotter unit. 3. A double-sided original or a single-sided original is automatically determined based on the image data read on the upper surface side and the lower surface side of the original passing portion, and when the single-sided original is processed, only the surface having the image data is processed as the image information. The document reading apparatus according to claim 1, further comprising a processing circuit or software capable of processing.