JP3514357B2 - Facsimile machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus having a book type scanner capable of reading images of documents, books, etc. placed on contact glass.

[0002]

2. Description of the Related Art FIG. 9 is a perspective view of a facsimile apparatus having a conventional book type scanner, and FIG. 10 is an explanatory view of the operation of a pressure plate in the facsimile apparatus shown in FIG.
Is a device main body, 2 is a pressure plate installed on the upper surface of the device main body 1, 3 is an operation panel on which various switches, buttons, etc. are arranged, 4 is a paper ejection port (not shown) opened on the side surface of the device main body 1. Paper tray for receiving recording paper ejected from
Is a paper feed cassette detachably attached to the apparatus main body 1.

As shown in FIG. 10, the pressure plate 2 is connected to the apparatus body 1 by a hinge 6, and one end of the hinge 6 is centered on a swing shaft 8 on which the apparatus body 1 is arranged. 1 is swingably connected, and the other end is swingably connected to the pressure plate 2 about a swing shaft 7 arranged at the end of the pressure plate 2. A contact glass 9 is fitted in an opening formed on the upper surface of the apparatus body 1, and a document for reading an image is placed on the contact glass 9.

Here, the distance from the contact glass 9 to the pressure plate 2 is variable by swinging the hinge 6 about the swing shaft 7 to change the swing angle of the hinge 6 (hereinafter referred to as the hinge angle). The pressure plate 2 is further swung about the swing shaft 8 to change the swing angle of the pressure plate 2 with respect to the contact glass 9 (hereinafter referred to as the pressure plate angle). Can be moved to a closed position for covering the original on the contact glass 9 or an open position for exposing the original on the contact glass 9 to the outside.

A carriage that moves in the main scanning direction along the contact glass 9 and a reading sensor (not shown) mounted on the carriage are arranged in the apparatus body 1 and move in the main scanning direction. The reading sensor scans the document placed on the contact glass 9 in a constant cycle to read the document image. At this time, in order to prevent distortion of the read image, it is necessary to bring the image area of the original into close contact with the contact glass 9. Further, in order to prevent noise from being superimposed on the image signal due to light from the outside of the device, the contact is prevented. It is necessary to shield the glass 9 from the outside. For this reason, when the original image is read, the original is pressed onto the contact glass 9 by the pressing plate 2 by holding the pressing plate 2 in the closed position, and the gap between the contact glass 9 and the original is shielded by the pressing plate 2. To do.

Further, when the image of the original D _S such as one document is read by the book type scanner, FIG.
As shown in FIG. 7, the contact plate 9 is placed with the pressure plate 2 in the closed position without swinging the hinge 6 with respect to the pressure plate 2.
When reading the image of the original document D _{S or} the image of the original document D _T having a certain thickness or more, such as a booklet, FIG.
As shown in 0 (b), the pressure plate 2 is made to correspond to the thickness of the document D _T.
By swinging the hinge 6 with respect to the pressure plate 2 in the closed position is spaced by the thickness of the document D _T from the contact glass 9 reads an image of the document D _T.

In the facsimile apparatus configured as described above, the reception mode in which the signal from the transmission destination sent through the telephone line can be received and the transmission mode in which the signal can be transmitted by connecting to the other party through the telephone line And the contact glass 9 in the transmission mode.
To specify the timing to detect the presence of the above document,
It is necessary to detect the open / closed state of the pressure plate 2. For this reason,
As shown in FIG. 10, the hinge 6 is provided with a shield plate 10, and the device body 1 is provided with a photo sensor corresponding to the shield plate 10.
11 are arranged. As shown in FIG. 10 (a), the shield plate 10 is detected by the photosensor 11 by moving the pressure plate 2 to the closed position. The photo sensor 11 outputs a detection signal to the control unit (not shown) by detecting the shield plate 10, and the control unit determines from the detection signal from the photo sensor 11 that the pressure plate 2 has moved to the closed position. , For example,
An optical sensor for detecting the document on the contact glass 9 is turned on, and control is performed so that the document image can be read after determining the presence or absence of the document.

[0008]

[Problems to be Solved by the Invention] However, FIG.
As shown in (b), when the document placed on the contact glass 9 is the document D _T having a certain thickness or more and the hinge angle is large, the shield plate 10 provided on the hinge 6 is used as a photo. A phenomenon may occur in which the photosensor 11 is switched from ON to OFF even though the pressure plate 2 is not moved from the closed position because the detection state of the photosensor 11 becomes unstable due to no detection by the sensor 11. There is.

Of course, even when a thick document D _T is set, a sensor having a wider detection area than the photo sensor 11 shown in the drawing is used in order to reliably detect that the pressure plate 2 is in the closed position. It is also possible to use it, but when such a sensor is used, the sensitivity of the sensor is lowered as a result, so that the user slightly opens the pressure plate 2 from the closed position and then from the contact glass 9. When the original is pulled out or placed on the contact glass 9, the sensor cannot detect the opening of the pressure plate 2, and it may not be possible to accurately determine the transition of the presence / absence of the original. is there. Therefore, for example, when the original is pulled out from the contact glass 9 after the original has been loaded and the destination number has been set, if the removal of the original is not detected, the destination number is not reset. There is a risk that the information will remain and will be transmitted to the wrong destination when the next transmission is performed.

Further, in the above-mentioned facsimile machine, the presence or absence of the original on the contact glass 9 can be detected by the reading sensor. However, for control, the presence or absence of the original is judged before the scanning by the reading sensor. Since it is necessary, a document sensor for detecting the presence or absence of the document on the contact glass 9 is provided. However, in order to reduce the apparatus cost, it is desirable to omit such a document sensor.

In order to solve the above problems, an object of the present invention is to control an opening / closing angle of a pressure plate and a distance from a contact glass by an analog signal from a single sensor.
It is an object of the present invention to provide a facsimile apparatus that is determined with the required accuracy, and that the presence or absence of a document on a contact glass is determined based on the determined opening and closing angle of the pressure plate and the determined separation distance.

[0012]

In order to solve the above-mentioned problems, a facsimile apparatus according to claim 1 of the present invention is arranged in a main body of the apparatus, and a contact glass on which an original for reading an image is placed, A pressure plate, which is held at a position to hold the original together with the contact glass and presses the original against the upper surface of the contact glass when reading the original image;
One end is swingably connected to the apparatus main body and the other end is swingably connected to the pressure plate, the pressure plate is swingably supported with respect to the contact glass, and the pressure plate is In a facsimile apparatus provided with a hinge member that is detachably supported with respect to a contact glass, the degree of inclination of the hinge member with respect to the pressure plate and the open / closed state of the pressure plate with respect to the contact glass are simultaneously detected. > and knowledge, the hinge member of the slope magnitude and the pressure plate
And detecting means you output an analog signal corresponding to the open and closed states, and A / D converting means for converting into a digital signal an analog signal from said detecting means, the magnitude of the slope of the hinge member
And the open / closed state of the pressure plate from the detection means.
Corresponds to the signal level of the digital signal obtained by force
Allows you to register in advance by hierarchizing into multiple levels
Stage and, based on said digital signal from said A / D converting means, from said storage means of said hierarchical levels Day
And a control means for determining the degree of inclination of the hinge member and the open / closed state of the pressure plate.

According to the facsimile apparatus of the first aspect , in addition to the binary judgment for judging only the closing or non-closing of the pressure plate, a plurality of pre-registered means are stored in the storage means.
Pressure plate when the pressure plate is opened in the level range of
The open / closed state can be determined with a required accuracy in the range from small opening to full opening, and the inclination of the hinge member when the pressure plate is closed can also be determined with a required accuracy.

Further, the facsimile apparatus according to claim 2, wherein the pre-dangerous detecting means includes a magnetic sensor for detecting a change in magnetic permeability of the magnetic material in the detection region, the detection of the magnetic sensor is fixed to the pressure plate A pressure plate side magnetic member held in the area and a main body side magnetic member fixed to the apparatus main body and held in the detection area of the magnetic sensor are provided.

[0015] Then, according to the facsimile apparatus according to claim 2, the pressure plate by a signal from a single magnetic sensor
The magnitude of the slope of 及 beauty hinge member, it is possible to determine with the required accuracy.

Further, the facsimile apparatus according to claim 3, before dangerous detecting means comprises a photo-interrupter for detecting a change in light transmittance of the transparent member in the detection region, the photo interrupter is fixed to the pressure plate The pressure plate side light transmitting member held in the detection region and the main body side light transmitting member fixed to the device body and held in the detection region of the photo interrupter.

[0017] Then, according to the facsimile apparatus according to claim 3, the inclination of the magnitude of the pressure Ita及 beauty hinge member by a signal from a single photo-interrupter, it is possible to determine with the required accuracy .

According to a fourth aspect of the present invention, in the facsimile device, the storage means stores the opened / closed state of the pressure plate , the degree of inclination of the hinge member, and the operation time for the pressure plate.
A plurality of combination of bets with the elements, and registered in advance transition information of whether the state of the document on the contact glass which correspond to these combinations, when the control means detects the opening and closing operation to the pressure plate, the pressure Open when the pressure plate is opened
The inclination of the closed state and the hinge member upon closure of the pressure plate
Along with determining the size of said counts the operating time required until the pressure plate is held in the closed position covering the contact glass from the start oscillating, the determined of the pressure plate
One combination that matches the open / closed state, the magnitude of the inclination of the hinge member , and the clocked operation time is selected from the storage means, and the transition information of the document presence / absence state corresponding to this one combination is read out. Manuscript presence / absence transition
It is characterized in that the device is controlled based on the information .

[0019] Then, according to the facsimile apparatus according to claim 4, without using a dedicated document sensor for detecting the presence of a document on the co down tact glass, the pressing plate of the document on the contact glass upon which is opened and closed Presence / absence can be accurately determined.

According to a fifth aspect of the present invention, in the facsimile device, the storage means stores the opened / closed state of the pressure plate , the degree of inclination of the hinge member, and the operation time for the pressure plate.
A plurality of combinations of the presence or absence of a signal input from the operation unit and elements, and registered in advance transition information of whether the state of the document on the contact glass which correspond to these combinations,
Said control means detects the opening and closing operation to the pressure plate, as well as determining the magnitude of slope of the hinge member upon closure of the pressure plate open and closed states and the pressure plate during opening of the pressure plate is swinging The operation time required from the start of movement to the time when the contact glass is held in the closed position is measured, and a signal is input from the operation unit during the opening / closing operation of the pressure plate and within a certain time before and after the opening / closing operation. determining the presence or absence of, one combination matching the presence and timed operation time of the signal input from the gradient magnitude and the operating portion of the determination by said pressure plate opening and closing with said Hin <br/> di member Is read from the storage means, the transition information of the presence / absence state of the document corresponding to this one combination is read, and the apparatus is controlled based on the transition information of the presence / absence state of the document.

[0021] Then, according to the facsimile apparatus according to claim 5, without using a dedicated document sensor for detecting the presence of a document on the co down tact glass, the pressing plate of the document on the contact glass upon which is opened and closed The presence / absence of an original can be accurately determined, and the presence / absence of a signal input from the operation unit is included as data for determining the presence / absence of an original on the contact glass, so that the accuracy of the presence / absence of an original can be improved.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing a configuration of a facsimile apparatus according to an embodiment of the present invention. Members corresponding to the members described with reference to FIGS. 9 and 10 are designated by the same reference numerals and the description thereof will be omitted. An ADF (automatic document feeder) unit 20 is arranged on the upper part of the apparatus main body 1 together with a book type scanner, and is provided with a pickup roller, a feed roller, a separation roller, a conveyance roller pair, and a paper discharge roller pair. this
The ADF unit 20 can be used only when the book type scanner is not used, and separates one document from the document stack loaded in the document loading unit 21 provided on the upper surface of the pressure plate 2,
This document is conveyed at a constant speed. 22 is a carriage guided so as to be movable along the lower surface of the contact glass 9, 23 is a reading sensor mounted on the carriage 22,
Reference numeral 24 is a drive motor that transmits a driving force to the carriage 22 to move the carriage 22. Here, when a document is separated and fed by the ADF unit 20, the reading sensor 23 is fixed at the position indicated by the solid line and the document conveyed by the ADF unit 20 at a constant speed is scanned to read an image. Be seen. When a book type scanner is used, the reading sensor 23 moves from the position indicated by the solid line to the position indicated by the chain line at a constant speed, and the document on the contact glass 9 is scanned to read an image.

Further, 30 is a drum-shaped photosensitive member, 31 is a cleaning unit for removing and collecting the toner remaining on the photosensitive member, and 32 is an electrostatic latent image formed by scanning the uniformly charged photosensitive member with a laser beam. A laser unit to be formed, 33 is a toner case containing toner for developing an electrostatic latent image, and 34 is a development for developing the electrostatic latent image on the photoconductor 30 into a toner image by the toner supplied from the toner case 33. Roller 35 is a transfer roller. In addition to the above-mentioned paper feed cassette 5, a paper feed cassette 36 is installed in the apparatus main body 1, and paper feed rollers 37 and 38 are provided at the mounting portions of the paper feed cassettes 5 and 36 in the apparatus main body 1, respectively. Has been. In the facsimile apparatus of the present embodiment, when one sheet feeding cassette 5, 36 is selected in advance and the image forming operation for the photoconductor 30 is started, one of the sheet feeding rollers 37, 38 is used. One sheet of recording paper is fed separately from inside 36. This recording paper is temporarily held at a position where it abuts on the nip portion of the registration roller pair 39, and after the leading end thereof is positioned, the photosensitive member 30
When the upper toner image reaches a predetermined position, the registration roller pair 39 starts the conveyance. Transfer roller 35
Transfers the toner image on the photoconductor 30 to the recording paper conveyed by the registration roller pair 39. The recording paper on which the toner image is transferred is conveyed to the fixing device 40, and after the toner image is fixed by being heated and pressed in the fixing device 40,
The paper is discharged onto the paper discharge tray 4.

FIG. 2 is a block diagram showing the arrangement of the control system in the facsimile apparatus according to this embodiment. 51 is AD
A scanner control unit that controls the F unit 20 and the book type scanner. A magnetic sensor 53 is connected to the scanner control unit 51 via an A / D conversion unit 52. Reference numeral 54 is a printer control unit that controls a printer unit that forms an image on recording paper, 55 is an operation control unit that generates command signals, data, etc. according to an operation on the operation panel 3, and 56 is an encoding / decoding unit 57. An image memory for temporarily storing the digitized image signal, 58 is a parameter memory for storing the set control parameters, and is backed up by the battery 59. Reference numeral 60 is a clock circuit for measuring time for defining control timing and the like, and 61 is a communication control unit for controlling the network control device 63 via the modem 62 and for controlling connection / disconnection with the telephone line by the network control device 63. , 64 is a CPU (Central Process-ing Unit) that controls the entire device according to an incoming signal input through the network control device 63 and the modem 62 and a command signal generated by the operation control unit 55, and 65 is a device control device. ROM (Read Only Mem) that stores programs for
ory), 66 is a buffer memory, 67 is a character generator, and 68 is a data bus connecting the respective members 51 to 67 forming the control unit.

FIG. 3 is a side sectional view showing an example of the angle detecting means in the facsimile apparatus of this embodiment . Detection means 70, a change in hinge angle and pressure plate angle is swing angle of the pressure plate 2 with respect to the contact glass 9 is a swing angle of the hinge 6 with respect to the pressure plate 2, i.e. the pressure plate 2
A magnetic sensor 53 fixed to the hinge 6, a magnetic plate 71 fixed to the pressure plate 2 and a magnetic plate 72 fixed to the apparatus body 1 are for detecting the open / closed state and the degree of inclination of the hinge 6. It is composed by. Magnetic plate 71 and magnetic plate
Each of the 72 is formed of a magnetic material that is curved in an arc shape, and is magnetized in advance so that the magnetic transmittance changes with a constant gradient in the arc direction.

Here, the magnetic plate 71 extends at a position around the swing shaft 7, and the magnetic plate 72 extends at a position around the swing shaft 8. Part of the magnetic plate 72 is configured to overlap each other in the detection area of the magnetic sensor 53. The magnetic sensor 53 moves along the magnetic plate 71 according to the change of the hinge angle, holds the detection area at a portion of the magnetic plate 71 corresponding to the hinge angle, and also changes the magnetic plate 71 according to the change of the pressure plate angle. It moves along 72 and holds the detection region at a portion of the magnetic plate 72 corresponding to the pressure plate angle. Therefore, the magnetic sensor 53 simultaneously detects a portion of the magnetic plate 71 corresponding to the hinge angle and a portion of the magnetic plate 72 corresponding to the pressure plate angle, and outputs an analog signal corresponding to the combination of the magnetic transmissivities thereof. .

FIG. 4 is a block diagram showing an example of a magnetic sensor used in the angle detecting means. The magnetic sensor 53 includes an AC waveform oscillator 73, a detection transformer 74 including a primary winding 74a, a reference winding 74b and the like. It is composed of a phase comparison circuit 75 and a smoothing circuit 76. One or both of the magnetic plate 71 and the magnetic plate 72 moves in the detection area S generated by the detection transformer 74, so that the smoothing circuit 76 outputs a voltage output (analog signal corresponding to a change in magnetic transmittance of the magnetic plates 71 and 72). ) Occurs. The voltage output from the smoothing circuit 76 is converted into a digital signal by the A / D converter 52, and this digital signal is input to the CPU 64 via the scanner controller 51 and the data bus 68.

The CPU 64 hierarchizes the digital signal obtained by the output from the magnetic sensor 53 so as to match any of a plurality of preset signal levels R, and the signal level R causes the contact glass 9 to the pressing plate 2 to be hierarchized. Both the magnitude of the inclination of the hinge 6 corresponding to the separation distance up to and the open / closed state of the pressure plate 2 with respect to the contact glass 9 are compositely determined.

FIG. 5 is a characteristic diagram showing the relationship between the sensor signal and the inclination of the hinge and the opening / closing of the pressure plate. The data corresponding to the signal level R shown in FIG.
It should be registered in M65. Here, the signal level R are layered 10 level R ₀ to R _9, R ₀ to R ₉
The following data corresponding to each level of ROM65
Registered in.

R ₀ : Pressure plate, closed, and hinge, no tilt R ₁ : Pressure plate, closed, hinge, and small tilt R ₂ : Pressure plate, small open, and hinge, no tilt R ₃ : Add pressure plate, the closure and the hinge, in slope (1) R _4: pressure plate, the intermediately open (1), and the hinge, no inclination R _5: a pressure plate, the closure and the hinge, in slope (2) R ₆ : Pressure plate, medium open (2) and hinge, no tilt R ₇ : Pressure plate, closed and hinge, large tilt R ₈ : Pressure plate, wide open and hinge, no tilt R ₉ : Pressure plate, FIG. 6 is an explanatory diagram showing an example of the size of the hinge inclination corresponding to the sensor signal and the open / close state of the pressure plate, with the hinge fully open and no hinge.
_The degree of inclination and the open / closed state of the hinge 6 corresponding to the signal levels R of ₀ , R ₁ , R ₂ , R ₆ , and R ₇ are shown.

The CPU 64 reads the data corresponding to the digital signal layered as the signal level R from the ROM 65, and judges the inclination of the hinge 6 and the open / closed state of the pressure plate 2 based on this data. When the pressure plate 2 is open, the hinge 6 is determined to have "no inclination".

Further, in the ROM 65, as shown in (Table 1),
The magnitude of the pressure plate angle when the pressure plate 2 is opened (), the presence or absence of the inclination of the hinge 6 when the pressure plate 2 is closed (), the length of the operation time (to) for the pressure plate 2, and the signal from the operation panel 3. A plurality of combinations each having the presence or absence of input as an element and the transition of the presence or absence state of the original on the contact glass 9 corresponding to these combinations are registered in advance.

[0033]

[Table 1]

When the CPU 64 detects the opening / closing operation on the pressure plate 2 by the signal from the magnetic sensor 53, the angle of the pressure plate 2 when the pressure plate 2 is opened and the hinge 6 when the pressure plate 2 is closed are detected.
The presence or absence of inclination of the pressure plate 2 is determined, and the operation time required from the start of swinging of the pressure plate 2 in the closed position until the pressure plate 2 is held in the closed position again is measured by the clock circuit 60, and the operation of the pressure plate 2 is performed. It is determined whether or not a signal is input from the operation panel 3 within a certain time before and after the operation. After this,
The CPU 64 registers one combination in the ROM 65 that matches the determined pressure plate angle, the presence or absence of the hinge 6 and the presence or absence of a signal input from the operation panel 3, and the operation time measured by the clock circuit 60. (Table 1), the transition of the document presence / absence state corresponding to this one combination is read out, and the apparatus is controlled based on this transition of the document presence / absence state. Here, the device control based on the transition of the presence / absence state of the document refers to, for example, control such as resetting the set destination telephone number or switching from the reception mode to the transmission mode.

The data of the document presence / absence state transition shown in (Table 1) is an example of data registered so as to be compatible with the facsimile apparatus of the present embodiment, and is naturally compatible with other facsimile apparatuses. The data whose contents have been changed is set as follows.

FIG. 7 is a circuit diagram showing an example of a photo interrupter used in the angle detecting means. The photo interrupter comprises a light emitting element 81, a light receiving element 82 and an amplifying transistor 83, and replaces the magnetic sensor 53 with the hinge 6. It is located in. Further, when the hinge angle and the pressure plate angle are determined by this photo interrupter, the light transmission plate 84 is arranged on the pressure plate 2 instead of the magnetic plate 71, and the magnetic plate is used.
Instead of 72, a light transmitting plate 85 is arranged in the apparatus main body 1. Here, the light transmitting plate 84 and the light transmitting plate 85 have the same shapes as the magnetic plate 71 and the magnetic plate 72, respectively, and the light transmittance with respect to the light from the light emitting element 81 has a constant gradient in the arc direction. The optical characteristics are adjusted in advance so as to change. When determining the hinge angle and the pressing plate angle, the light emitting element 81 is caused to emit light, and the light emitted from the light emitting element 81 is transmitted through the light transmitting plate 84 and the light transmitting plate 85 to receive the light receiving element.
Upon incidence on 82, the light receiving element 82 produces a sensor output that is approximately proportional to the amount of incident light within a predetermined range. This sensor output is amplified by the transistor 83 and input to the A / D converter 52.
The / D converter 52 converts the analog value into a digital value. FIG. 8 is a characteristic diagram showing the relationship between the light transmittance and the sensor output from the photo interrupter. Since the light transmittances of the light transmitting plate 84 and the light transmitting plate 85 detected by the photo interrupter change according to the hinge angle and the pressure plate angle, respectively, the CPU 64 performs the same processing as the case of the sensor output from the magnetic sensor 53. By executing the above, it is possible to judge the open / closed state of the pressure plate 2 and the magnitude of the inclination of the hinge 6 based on the sensor output from the photo interrupter.

[0037]

As described above, according to the first aspect of the present invention.
According to the described facsimile machine, in addition to the binary judgment for judging only the closing or non-closing of the pressure plate, the storage means has
In multiple pre-registered level ranges, the open / closed state of the pressure plate when the pressure plate is opened can be determined with the required accuracy in the range from small open to full open, and the hinge when the pressure plate is closed Since the inclination of the member can be determined with the required accuracy, it is possible to enhance the reliability of automatic control of the device executed according to the open / close state of the pressure plate, for example, automatic reset of the telephone number of the transmission destination. .

Further, according to the facsimile apparatus according to claim 2, wherein the magnitude of the slope of the pressure Ita及 <br/> beauty hinge member by a signal from a single magnetic sensor, to determine a required precision This makes it possible to prevent an increase in device cost due to an increase in the number of sensors.

Further, according to the facsimile apparatus according to claim 3, the inclination of the size of the opening and closing state及 beauty hinge member of the pressure plate by a signal from a single photo-interrupter, be determined by the required accuracy Since this becomes possible, it is possible to prevent an increase in device cost due to an increase in the number of sensors.

Further, according to the facsimile apparatus according to claim 4, without using a dedicated document sensor for detecting the presence of a document on the co down tact glass, the pressing plate of the document on the contact glass upon which is opened and closed Since the presence / absence can be accurately determined, it is possible to improve the reliability of automatic control of the device, which is executed according to the transition of the presence / absence of the document on the contact glass, for example, switching from the reception mode to the transmission mode Moreover, the cost of the apparatus can be reduced by omitting the document sensor.

Further, according to the facsimile apparatus according to claim 5, without using a dedicated document sensor for detecting the presence of a document on the co down tact glass, the pressing plate of the document on the contact glass upon which is opened and closed Since the presence / absence can be accurately determined, and the presence / absence of a signal input from the operation unit is included as the data for determining the presence / absence of the original on the contact glass, the accuracy of the determination of the presence / absence of the original can be improved. Automatic control of the device executed according to the transition of the presence / absence of the document on the contact glass, for example, reliability such as switching from the reception mode to the transmission mode can be improved, and the device cost can be reduced by omitting the document sensor. Will be possible.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a configuration of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a control system in the facsimile apparatus according to the present embodiment.

FIG. 3 is a side sectional view showing an example of an angle detecting means in the facsimile apparatus of the present embodiment.

FIG. 4 is a configuration diagram showing an example of a magnetic sensor used in an angle detection unit in the facsimile apparatus of this embodiment.

FIG. 5 is a characteristic diagram showing a relationship between a sensor signal from a magnetic sensor, an inclination of a hinge, and an open / closed state of a pressure plate.

FIG. 6 is an explanatory diagram showing an example of the size of the inclination of the hinge corresponding to the sensor signal from the magnetic sensor and the open / closed state of the pressure plate.

FIG. 7 is a circuit diagram showing an example of a photo interrupter used in an angle detection unit in the facsimile apparatus of this embodiment.

FIG. 8 is a characteristic diagram showing a relationship between a light transmittance and a sensor output from a photo interrupter.

FIG. 9 is a perspective view of a facsimile apparatus having a conventional book type scanner.

10 is an explanatory diagram of the operation of the pressure plate in the facsimile apparatus shown in FIG.

[Explanation of symbols]

1 ... Device main body, 2 ... Pressure plate, 3 ... Operation panel, 6
... Hinge, 9 ... Contact glass, 51 ... Scanner control unit, 52 ... A / D conversion unit, 53 ... Magnetic sensor, 57 ... Encoding / decoding unit, 64 ... CPU (Central Processing Unit),
65 ... ROM (Read Only Memory), 70 ... Angle detection means,
71, 72 ... Magnetic plate, 81 ... Light emitting element, 82 ... Light receiving element,
84, 85 ... Light transmission plate.

Claims (5)

(57) [Claims] 1. A contact glass which is disposed in the main body of the apparatus and on which an original for reading an image is placed, and a contact glass which holds the original together with the contact glass when the original image is read. A pressure plate to be pressed into contact with the main body of the apparatus, and one end of which is swingably connected to the main body of the apparatus, and the other end of which is swingably connected to the pressure plate so that the pressure plate is swingably supported with respect to the contact glass. And a hinge member that supports the pressure plate so that the pressure plate can be brought into contact with and separated from the contact glass, and a degree of inclination of the hinge member with respect to the pressure plate and opening / closing of the pressure plate with respect to the contact glass. State
And simultaneously detected, and converts the detection <br/> detecting means you output an analog signal corresponding to the open and closed states of the size and the pressure plate of the inclination of the hinge member, the analog signal from the detecting means into a digital signal A / D conversion means, the degree of inclination of the hinge member and the opening / closing state of the pressure plate.
State is obtained by the output from the detection means.
According to the signal level of the digital signal,
Storage means for previously registering stratified, based on said digital signal from said A / D converting means,
Receives the hierarchical level data from the storage means.
And the size of the inclination of the hinge member and the pressure plate .
A facsimile apparatus comprising: a control unit that determines an open / closed state . Wherein before dangerous detecting means includes a magnetic sensor for detecting a change in magnetic permeability of the magnetic material in the sensing region, the pressure plate side magnetic held is fixed to the pressure plate in the detection region of the magnetic sensor The facsimile apparatus according to claim 1, further comprising: a member; and a main body side magnetic member fixed to the main body of the apparatus and held in a detection area of the magnetic sensor. 3. Before danger detecting means comprises a photo-interrupter for detecting a change in light transmittance of the transparent member in the sensing area, a pressure plate which is held fixed to the pressure plate in the detection area of the photointerrupter 2. The facsimile apparatus according to claim 1, further comprising a side light transmitting member and a body side light transmitting member fixed to the apparatus body and held in a detection area of the photo interrupter. 4. An open / closed state of the pressure plate in the storage means.
And the plurality of combinations of the slope of the hinge member and the size and the operating time for the pressure plate and elements, and registered in advance transition information of whether the state of the document on the contact glass respectively corresponding to these combinations, the control means, upon detecting the opening and closing operation to the pressure plate, wherein while determining the magnitude of the inclination of the hinge member upon closure of the opening and closing state and the pressure plate during opening of the pressure plate, the pressure plate begins oscillating are measures the operating time required until held in the closed position covering the exposure glass from, the determined closed state and the hinge of the pressure plate
One combination that matches the magnitude of the inclination of the member and the operation time that has been timed is selected from the storage means, and the transition information of the presence / absence state of the document corresponding to this one combination is read out to determine the presence / absence state of this document. 4. The facsimile apparatus according to claim 1, wherein the apparatus is controlled based on the transition information . 5. An open / closed state of the pressure plate in the storage means.
And a plurality of combinations of the presence or absence of a signal input from the inclination of the hinge member size and the pressurizing operation time for the pressure plate and the operating unit and the elements, and the presence state of the document on the contact glass which correspond to these combinations the transition information is registered in advance, said control means detects the opening and closing operation to the pressure plate, to determine the magnitude of slope of the hinge member upon closure of the pressure plate open and closed states and the pressure plate when opening the At the same time, the operation time required from the start of swinging of the pressure plate until the pressure plate is held in the closed position for covering the contact glass is measured, and during the opening / closing operation of the pressure plate and within a certain time before and after the opening / closing operation. determining whether the signal input from the operation unit, chromatic signal input from the slope of the size and the operating portion of the determination by said pressure plate opening and closing with said Hin <br/> di member And one combination that matches the timed operation time, select from the memory means, reads out the transition information of whether the state of the document corresponding to the one combination, apparatus based on the transition information of whether the state of the document The facsimile machine according to claim 1, 2 or 3, wherein the facsimile machine controls the machine.