JP3722122B2 - Document reader - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a book reading type document reading device that reads a stationary document, such as a facsimile machine.
[0002]
[Prior art]
In a conventional document reading apparatus, the position and drive of a light source for irradiating light on a document is controlled by an optical system drive control unit, and the standby position is an ADF type reading position near an ADF (automatic document feeder) or The reading start position is determined as a book reading type. The reading start position of the book reading type is set in the vicinity of the end of the translucent plate for setting a stationary document on the opposite side to the ADF. When performing the book reading type reading, the light source reciprocates between a book reading type reading start position and a reading end position near the ADF type reading position.
In the book reading type, it is displayed that the next original can be read after the light source returns from the reading end position to the reading start position.
[0003]
[Patent Document 1]
JP-A-4-70256 [Patent Document 2]
Japanese Patent Application Laid-Open No. 6-106876
[Problems to be solved by the invention]
As described above, in the conventional document reading apparatus, when reading a document at a reading start position or a reading position of a light source, which is different from the standby position, the light source waits every time one or a series of document reading is completed. There is a problem in that the time for returning to the position and the time for moving to the reading start position or the reading position thereafter are wasted, and the start of the next reading is delayed.
For example, when the standby position of the light source is an ADF type reading position, when reading a stationary document by the book reading type, the light source moves from the reading start position to the reading end position and then returns to the reading position standby position. Thereafter, when the stationary original is set again by the book reading method and the reading start instruction button is operated, the light source moves to the reading start position.
[0005]
In a document reading apparatus that reads a stationary document by a book reading method, the light source is in a standby position or a reading start position when the next document is set after waiting for an indication that the next document can be read. There was a problem that the time until returning to the process was wasted and the start of reading was delayed accordingly.
SUMMARY An advantage of some aspects of the invention is that it provides a document reading apparatus capable of preventing a reading start from being delayed.
[0006]
[Means for Solving the Problems]
The document reading apparatus according to the present invention is capable of a book reading method for reading a stationary document and an automatic document feeding method for reading a moving document from an automatic document feeder, and a document whose irradiation light source stands by at an automatic document feeding type reading position. In the reading device, after reading a stationary document, a means for returning the irradiation light source to the reading start position of the stationary document, and a reading of the next stationary document is possible when the operation of returning the means is started. characterized in that it comprises means for character display.
In this document reading apparatus, when the irradiation light source starts to return to the reading start position of the stationary document after reading the stationary document, the display means indicates that the next stationary document can be read. indicate.
Thus, when the operator reads the next stationary document, the operator can set the next stationary document without waiting for the irradiation light source to move to the start position of the book reading type. It is possible to speed up the start of reading of still documents.
[0007]
Document reading equipment according to the present invention, in the document reading apparatus is capable of automatic document feeding type for reading a moving document from the book Readable and automatic document feeder for reading a stationary document, after reading the stationary document, illumination source Is provided with means for displaying characters that the next stationary document can be read when the operation of returning to the reading start position of the stationary document is started .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings showing the embodiments.
FIG. 1 is a block diagram showing a configuration of a facsimile apparatus which is an embodiment of a document reading apparatus according to the present invention. The facsimile apparatus 1 encodes monochrome pixels read by the reading unit 12, decodes the received code into monochrome pixels, a print unit 11 that prints monochrome pixels decoded by the codec 4, and a character. A character generator 5 that outputs fonts, a display unit 6, a clock unit 7, an operation unit 8 including numeric keys, operation keys, and the like, a ROM 9, and a RAM 10 are provided.
[0009]
The facsimile apparatus 1 also includes a modem unit 3 that modulates a transmission code into a transmission signal and demodulates a reception signal into a code, a line control unit 2 that controls connection between the facsimile apparatus and the public line network, A CPU 17 that processes signals from the respective units and controls the respective units, and a bus 18 that connects the CPU 17 and the respective units are provided.
[0010]
The reading unit 12 includes an ADF document detection unit 13 that detects whether or not a document is set on an ADF (automatic document feeder), a reading detection unit 27 that reads an image into black and white pixels, and opens and closes the book platen cover. An optical system drive control unit for controlling the driving of the optical system for the reading detection unit 27, in which the position operation differs between the book platen cover open / close detection unit 14 to be detected, and the ADF type for reading a moving document and the book reading type for reading a stationary document. 15 and an ADF document conveyance control unit 16 that controls document conveyance of the ADF.
[0011]
FIG. 2 is a cross-sectional view showing the main configuration of the reading unit 12 of the facsimile apparatus 1. The reading unit 12 includes translucent plates 22 and 23 having a depth equal to or larger than the width of a document that can be read. The upper surface of the translucent plate 22 constitutes a stationary original reading surface having a size substantially equal to that of a readable original. The translucent plate 23 is provided near one end of the translucent plate 22, and its upper surface constitutes a reading surface of a moving document.
[0012]
Below the light-transmitting plates 22 and 23, a light source 24 for irradiating light to the original, a plurality of reflection mirrors 25 for changing the path of reflected light from the original, and a collection for collecting the reflected light from the reflection mirror 25 An optical lens 26 and an image sensor (reading detection unit) 27 that reads image information on a document by reflected light from the reflection mirror 25 condensed by the condenser lens 26 are provided. The light source 24 and the reflection mirror 25 have a length substantially equal to the depth of the light-transmitting plates 22 and 23, respectively.
The position and drive of the light source 24 are controlled by the optical system drive control unit 15, and the standby position is an ADF-type reading position A near the ADF or an end portion on the opposite side of the translucent plate 22 from the ADF. The book reading type start position B is determined. The light source 24 reciprocates between a start position B and an end position C in the vicinity of the position A when performing book reading type reading.
[0013]
A book platen cover 31 is provided above the translucent plate 22 so as to cover the translucent plates 22 and 23 so that it can be opened and closed. When the book platen cover 31 is closed, the book platen cover 31 is directly below the book platen cover 31. At the position, a book platen cover opening / closing detection unit 14 for detecting opening / closing of the book platen cover 31 is provided.
The book platen cover 31 includes a document supply tray 32 in which a moving document before reading is set on an upper portion thereof, and a document discharge tray 33 in which a moved document after reading is stored below the document supply tray 32. , And a guide mechanism 34 that is connected to one side of each of the trays 32 and 33 and disposed above the translucent plate 23. The document supply tray 32, the guide mechanism 34, and the document discharge tray 33 constitute an ADF (automatic document supply device).
[0014]
In the guide mechanism 34, separation rollers 35 and 36 for separating the documents one by one are provided at the boundary with the document supply tray 32. An ADF document detection unit 13 for detecting whether or not a document is set is provided on the document supply tray 32 side of the separation rollers 35 and 36.
A plurality of transfer rollers 37 are provided between the separation rollers 35 and 36 and the document discharge tray 33, and a transfer force is applied to the moving documents separated by the separation rollers 35 and 36.
The book platen cover 31, the document supply tray 32, the document discharge tray 33, the guide mechanism 34, the separation rollers 35 and 36, and the transfer roller 37 have lengths substantially equal to the depths of the translucent plates 22 and 23, respectively. .
[0015]
The operation of the facsimile apparatus 1 having such a configuration will be described below with reference to flowcharts 3 and 4 showing the operation. The following operation is performed in addition to step S24 in which the optical system is moved to the standby position regardless of whether the standby position of the light source 24 of the optical system is either the ADF reading position A or the book reading start position B. Are common.
[0016]
If the book platen cover open / close detection unit 14 does not detect the opening → closing or closing → opening of the book platen cover (S10) and the ADF document detection unit 13 detects the document (S12), the ADF type reading is performed. In operation, it is checked whether or not the light source 24 of the optical system is at the ADF-type reading position A (FIG. 2) near the ADF (S14).
If the book platen cover open / close detection unit 14 does not detect opening / closing or closing → opening of the book platen cover (S10) and the ADF document detection unit 13 does not detect a document (S12), the standby state is continued. .
[0017]
If the optical system light source 24 is not at the ADF type reading position A (S14), the optical system drive controller 15 moves the light source 24 to the ADF type reading position A (S16). After the light source 24 is moved to the reading position A (S16), and if the light source 24 of the optical system is at the reading position A (S14), timing of a predetermined time is started (S18). If the reading start instruction button is not operated on the operation unit 8 within this predetermined time (S20, 22), the light source 24 is moved to the standby position (S24). That is, if the standby position of the light source 24 of the optical system is the ADF type reading position A, it is stopped at that position, and if it is the book reading type start position B, it is moved to the start position B to enter the standby state. Return.
[0018]
If the reading start instruction button is operated on the operation unit 8 within the predetermined time (S20), the reading detection unit 27 reads one sheet at a time until there is no moving document on the ADF document supply tray 32 (S26). When this reading is completed, the light source 24 is moved to the standby position (S24).
[0019]
If the book platen cover open / close detection unit 14 detects opening → closing or closing → opening of the book platen cover (S10), the book reading type reading operation is started, and the light source 24 of the optical system starts the book reading type start position. If it is not in B (S28), the optical system drive controller 15 moves the light source 24 to the start position B (S30).
After the light source 24 is moved to the start position B (S30), if the light source 24 is at the book reading type start position B (S28), timing of a predetermined time is started (S29). If the reading start instruction button of the operation unit 8 is operated within this predetermined time and there is a document reading instruction (S31), the stationary document reading operation is started, and the optical system drive control unit 15 sets the light source 24 to the start position. While moving from B to the end position C (S32), one page of a stationary document is read (S34).
[0020]
If there is no document reading instruction within the predetermined time (S31), the light source 24 is moved to the standby position (S24). That is, if the standby position of the light source 24 of the optical system is the ADF type reading position A, it is moved to the reading position A, and if it is the book reading type start position B, it is stopped at that position and enters the standby state. Return.
[0021]
Next, when this reading (S34) is completed and the optical system drive control unit 15 starts to move the light source 24 back to the start position B (S36), "reading is possible" is displayed on the display unit 6. Along with (S40), the timing of a predetermined time is started (S42). Within this predetermined time, the reading start instruction button of the operation unit 8 is operated to instruct the reading of the still page of the next page (S44), and if the light source 24 has returned to the start position B (S48), the next page is stopped. The document reading operation is started (S32).
If there is no instruction for reading the still page of the next page (S44), the light source 24 is put on standby at the start position B. That is, after the original is read by the book reading type, the light source 24 is kept waiting at the book reading type start position B for a predetermined time.
[0022]
If there is no instruction to read the still page of the next page within the predetermined time (S44, 46), the light source 24 is moved from the start position B to the standby position (S24). That is, if the standby position of the light source 24 of the optical system is the book reading type start position B, it is stopped at that position, and if it is the ADF type reading position A, it is moved to the reading position A to enter the standby state. Return.
[0023]
【The invention's effect】
According to the document reading apparatus according to the present invention, when the operator reads the next stationary document, the operator does not wait for the irradiation light source to move to the start position of the book reading type, and does not wait for the next stationary document. Since it can be set, the start of reading the next stationary document can be accelerated.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a facsimile machine as an embodiment of a document reading apparatus according to the present invention.
FIG. 2 is a cross-sectional view showing a main configuration of a reading unit of the facsimile apparatus shown in FIG.
FIG. 3 is a flowchart showing an operation of the facsimile apparatus shown in FIG. 1;
4 is a flowchart showing the operation of the facsimile apparatus shown in FIG.
[Explanation of symbols]
1 Facsimile device (document reading device)
6. Display (display means)
DESCRIPTION OF SYMBOLS 12 Reading part 13 ADF document detection part 14 Book platen cover opening / closing detection part 15 Optical system drive control part 22, 23 Translucent plate 24 Light source (irradiation light source)
32 Document supply tray 33 Document discharge tray 34 Guide mechanism

Claims (2)

A book reading method for reading a stationary document and an automatic document feeding method for reading a moving document from an automatic document feeding device are possible, and a stationary document is read in a document reading device in which an irradiation light source stands by at an automatic document feeding type reading position . And a means for returning the irradiation light source to the reading start position of the stationary document and a means for displaying a letter indicating that the next stationary document can be read when the returning operation is started. Document reading device. In a document reading apparatus capable of a book reading method for reading a stationary document and an automatic document feeding method for reading a moving document from an automatic document feeding device, the irradiation light source returns to the reading start position of the stationary document after reading the stationary document. An original reading apparatus comprising: means for displaying characters that the next still original can be read when the operation is started.

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