JPS62200869A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To execute the correct recording again by the contents of an equivalent bit map memory at the time of a fault and to decrease the wasteful holding time of a line by resetting the accumulating contents of the bit map memory by a detecting signal based upon the fact that the discharging action of a recording paper is completely finished. CONSTITUTION:A bit map memory 306 for accumulating image information having a bit capacity equivalent to the number of the picture element for one page of a receiving recording is provided, the image signal of a dot unit to receive to this and execute the recording is accumulated, and by the detecting signal of a recording detecting sensor provided at the discharging part of the recording paper completed by the receiving recording, based upon the fact that the discharging action of the recording paper is completely finished, the contents of the above-mentioned bit map memory 306 are reset. Consequently, at the time of the fault such as a recording paper jamming on the way of the receiving recording, receiving data are not lost. Further, without waiting for the confirmation of the recording normal completion, when a document completing command from an opponent comes, the wasteful line holding time is decreased by expecting the recording normal completion and returning a document completing affirming response.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a facsimile device, and more particularly, a facsimile device configured to record on plain paper using an electrophotographic recording method using a laser beam. It is related to.

[Technical background of the invention and its problems]

2. Description of the Related Art Conventionally, facsimile receiving and recording apparatuses have mainly adopted a thermal recording method and an electrostatic recording method as means for receiving and recording image signals transmitted from a remote location. Among these, the thermal recording method produces an image by selectively energizing a thermal head, which is made up of a large number of minute heat-generating resistor elements arranged in a line that generate heat using Ziehl heat, to primary color the thermal recording paper in contact with it. It has the advantage that the process is simple and the device can be constructed relatively easily and compactly.
Used in many facsimile machines. However, since the recording paper is a special paper, it has problems in naturalness, storage stability, and tampering resistance, and this has the drawback that its use is restricted. On the other hand, the electrostatic recording method uses electronic scanning of multi-stylus recording electrodes to form an electrostatic latent image on the electrostatic recording paper that comes into contact with it, then develops it to make it visible, and fixes it to receive and record a permanent image. It obtains the above-mentioned storage stability in thermosensitive recording,
Although the problem of tamper resistance is solved, the recording medium, electrostatic recording paper, has some disadvantages in its naturalness and is somewhat expensive, and the running costs of facsimile machines that use it are relatively high. be.

Recently, facsimile machines using an electrophotographic recording method using a laser beam as a light source have been studied, which allows the use of inexpensive plain paper as a recording medium. In this method, a photoconductor photosensitive drum, such as a selenium drum, is uniformly charged in a dark place, and this is modulated by the signal to be recorded and then scanned and exposed with a laser beam to form an electrostatic latent image. The electrostatic latent image is developed and visualized, then transferred to plain paper and fixed to obtain a permanent image. Therefore, since this type of device uses plain paper, it has the advantage of being sufficiently natural in terms of writing properties, gloss, and texture, and also having relatively low running costs.

However, with this type of apparatus, various requirements suitable for performing facsimile recording have not yet been fully satisfied.

For example, in a general VC facsimile, in order to improve the efficiency of using the transmission @ line and perform high-speed communication, the image signal obtained by scanning the original to be sent is digitized, then encoded and transmitted. Images are decoded and recorded and played back. This reduced recording speed changes depending on the sign of the image signal, and is based on intermittent scanning recording with frequent starts and stops. However, in the above-mentioned electrophotographic recording apparatus that uses a laser beam, a photosensitive drum is used as a recording mask, and its considerable inertial mass makes it impossible to follow frequent starts and stops. Therefore, it is necessary to take some measures to apply it to digital facsimile using encoding and decoding.

In addition, when an electrophotographic recording method using a laser beam is applied to a facsimile machine, in combination with a scanner that scans the transmitted document, two systems of optical systems are required, which occupies a lot of space, which is not desirable in terms of space 7 actors. The disadvantage is that there is no

In addition, in order to avoid frequent starts, stops, and stops, in a method in which received data is stored in a storage device such as a memory and then read out continuously, the time between the end of receiving the last data and the end of recording that data is There is a recording time for one page, so it takes one page of recording time to return a document end acknowledgment response in response to a document end command from the other party's facsimile, and the line holding time is wasted. This also had the disadvantage of increasing communication costs.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its object is to provide a plain paper recording facsimile device with high performance and high image quality.

Another object of the present invention is to effectively provide a digital facsimile device that applies an electrophotographic recording method using a laser and that also involves encoding and decoding of image signals.

Another objective was to develop a 7-axis device that uses an electrophotographic recording method using a laser beam, which enables stable and accurate re-recording of received data even in the event of a jam or other failure during reception recording. It is provided.

Yet another purpose is to eliminate the time lag between the end of reception and the end of recording, which exists in laser electrophotographic recording systems.
The purpose is to reduce the wasted holding time of lines.

[Summary of the invention]

In the facsimile machine of the present invention in which an electrophotographic recording method using a laser is applied to reception recording, a recording paper detection sensor is provided at the discharge portion of the recording paper after the reception recording of the receiving mechanism section is completed,
In addition, a bitmap memory is provided that can decode the coded data of the facsimile image signal page by page after receiving it, convert it into dot information for at least one page to be recorded, and store it. This is read out continuously at a constant speed for each scanning line to modulate the laser beam, and this is used as a light source to obtain a reception record using an electrophotographic recording method. Since the stored contents of the bitmap memory are reset by a detection signal based on the complete completion of the paper ejection operation, the bitmap memory is reset in the event of a failure such as a jam during reception recording. It becomes possible to perform correct recording again depending on the contents of the map memory. In addition, after receiving the last page of the document in the bitmap memory, when a document end command is received from the other party's facsimile machine, a document end acknowledgment response is sent back without waiting for the end of recording, thereby starting the handshake. The above objectives are achieved by reducing wasted time and reducing unnecessary line holding time.

[Embodiments of the invention]

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 shows a facsimile machine that uses an electrophotographic recording method using a laser beam to record reception. In this device, a transmitting mechanism section 10 is located in the upper part of the body 1, a receiving recording section 60 is located in the middle part, and a facsimile control system 30 including a power source is further disposed in the space below the transmitting mechanism section. Reference numeral 10 indicates a paper feed tray 11, a transmission stacker 12, an automatic paper feed section 20, a sub-scanning mechanism section 30, and a reading optical system 50.
It consists of The paper feed tray 11 is located in front of the automatic paper feed section 20, and is used to stack one or more documents to be transmitted.The paper feed table 11 is provided with a document width guide 13t- which is movable depending on the size of the transmitted document. We are prepared. However, the transmission stacker has a function of stacking and temporarily docking the documents discharged from the sub-scanning mechanism section 30 after transmission scanning is completed. The automatic paper feed section 20 is

It is composed of a crawler 21, a reversing roller 22, a stepping motor 23 for driving them, a self-feeding roller 24, and a document detection sensor 25. The kick roller 21 is provided to increase the conveyance force of the transmitted document and to prevent feeding errors.The reversing roller 22 rotates in the opposite direction to the self-feeding roller 24, which will be described later, to prevent multiple feeding of the transmitted document. This is a rubber friction roller to prevent this. The self-feeding roller 224 has drive rollers 31 and 32 included in the sub-scanning mechanism section 30, which will be described later, and their respective shafts are connected to each other by a timing belt 36 and an electromagnetic clutch (not shown), and the transmitted document is moved by friction force. In order to reliably feed 91 sheets at a time, a rubber roller with a high coefficient of friction with the paper is used. Further, the document detection sensor 25 detects the presence or absence of a transmission document on the paper feed table 11 .

The sub-scanning mechanism section 30 includes drive rollers 31 and 32, pinch rollers 33 and 34 and a back roller 35 that are paired with them, a stepping motor 37 that drives these rollers via a timing belt 36, and a paper feed guide 38. It is composed of a wedge-shaped guide 39, an intermediate sensor 40, and an edge sensor (not shown). Drive roller part 32
are paired with pinch rows 33 and 34, respectively, and are used to pinch the original to be sent and convey it by frictional force. A roller made of white resin is used to prevent parts from being read as black, and a gap slightly wider than the thickness of the transmitted document is formed between the wedge-shaped guides 39 to prevent the transmitted document from floating up and down. It has the function of always performing stable reading scanning. The intermediate sensor 40 is used to detect and monitor the passage of the original, and the edge sensor (not shown) optically detects the leading edge of the transmitted original and performs position control to feed the original to a predetermined reading scanning position. It functions as a purpose.

It is composed of a reading optical system 50Fi, a fluorescent lamp 51, a reflecting mirror 52, a lens 53, and a CCD image sensor 54. The fluorescent lamps 51 are used as a light source for illuminating the reading scanning line of the transmitted document, and in this embodiment, two fluorescent lamps arranged in parallel are used as a pair. The reflecting mirror 52 is a flat reflecting mirror that exchanges optical axes so as to reflect the reflected image of the transmitted original by the fluorescent lamp 51 at a substantially right angle and guide it to a CCD image sensor 54, which will be described later. The lens 53 captures the reflected image of the transmission original at the scanning position using a COD image sensor (described later). This is for forming an image on 54 photoelectric conversion elements.

The CCD image sensor 54 is composed of a large number of photodiodes (for example, 4096 pixels) and a COD shift register, and performs full photoelectric conversion of the grayscale information of the transmission original imaged by the lens 53 to obtain a serial image signal. It is.

Next, the receiving mechanism section 60 includes an optical signal generating section 70 and an image recording section 80 . Recording paper feed section 100. It is composed of a receiving stacker 61 and a fan 62. The optical signal generating section 70 includes a semiconductor laser that can be directly modulated by an image signal to be recorded, and a laser beam generating section 71 that includes a collimator lens for condensing and collimating the diverging light of the laser. an optical deflector 73 that airtightly houses a rotating polygon mirror that is integrated with a motor in order to temporally/angularly scan a photoreceptor drum 81, which will be described later, with a laser beam 72;
a second f# lens 74 for correcting scanning distortion caused by uniform angular velocity motion after deflection to obtain uniform linear scanning on the photoreceptor; and two reflecting mirrors 75 for increasing the space factor of the apparatus. It consists of 76.

The optical signal generating section 70 described above is sealed and housed in a box 77 in order to protect the optical system from dust and the like and maintain the stability of the apparatus.

The image recording section 80 is formed by scanning and exposing it with the modulated laser beam 72 to form a photoconductive material, such as selenium, on its surface to create an electrostatic latent image corresponding to the transmitted document. Photoreceptor drum 81 and this photoreceptor drum 81
, a charger 82 for uniformly electrostatically charging the surface of the photoreceptor drum 81, and a photoreceptor drum 81 after being scanned and exposed by a laser beam, sequentially along the rotational direction of the arrow.
A developer 83 for developing the electrostatic latent image above with toner and making it visible, a recording paper to be described later is brought into close contact with the photoreceptor drum 81, and the developed toner image as described above is transferred onto the recording paper. a transfer device 84 for removing the transferred recording paper from the photoreceptor drum 81; a peeling device 85 for smoothly peeling off the recording paper after the transfer from the photosensitive drum 81; and a peeling device 85 for cleaning the residual toner image transferred to the recording paper in preparation for the next recording process. A cleaner 86 and a suction belt 87 that transports the peeled recording paper with the toner image side facing up.
, and a fixing device 88 that further includes a heat roll for thermally melting the toner image on the recording paper and fixing it to the recording paper to make a permanent image.
and a discharge roller 89 and a pinch roller 90 that discharge the fixed recording paper to the outside of the apparatus, and a recording paper detection sensor 91.
It is composed of.

Here, the recording paper detection sensor 91 is composed of, for example, a light emitting element and a light receiving element arranged to sandwich the passage of the recording paper. This is to detect passage.

Note that the photosensitive drum 81, the developing device 83, and the suction belt 87
, the fixing device 88 and the discharge row 289 are rotationally driven by at least one motor (not shown), and the charger 82
, the transfer device 84 and the peeling device 85 are electrically connected to a high voltage generator 91 to generate corona ions.

The recording paper supply unit lOO stores recording paper before recording image information received by facsimile and feeds it to the photoreceptor drum 81. two recording paper cassettes (101, 104) that store A4 and A4 (A4 and 84) stacked separately; and push-up mechanisms (103 and 106) consisting of leaf springs that push the stacked recording papers A and B upward. , paper feed rollers 102 and 105 for separating and taking out the pushed up recording sheets one by one from above; f & paper guideways 107, 108 and 10
9. Two pairs of feed rollers and pinch rollers 110, 111 and 112, 113 for feeding the recording paper;
Furthermore, it is comprised of an alignment mechanism 114 for temporarily stopping the leading edge of the next recording paper taken out by the paper feed roller 102 or 105 and adjusting the posture of the recording paper. A recording paper top sensor 115 is provided behind the alignment mechanism 114 in the course of the recording paper guide path 1090.

Like the recording paper detection sensor 91 disposed in the image recording section 80 described above, this sensor is composed of a light emitting element and a light receiving element. This is to detect.

This is for stacking and temporarily storing the recording paper ejected by the ejection roller 89 and pinch roller 90 after the reception recording is completely completed.
On the other hand, the seventh ann 62 is for discharging air warmed by heat emitted from the fixing device 88 described above and further from the facsimile control system 30 described later to the outside of the apparatus, thereby suppressing a rise in temperature within the apparatus.

The facsimile control system 30 located at the bottom of the device includes an electronic circuit and a power supply circuit for operating the facsimile device, and handles the overall control of the device, control and connection procedures of transmission paths, and image signal processing. , an encoding/decoding/control section 31 that performs encoding, decoding, transmission reading control, reception recording control, etc., and electrical/mechanical components such as various sensors, stepping motors, solenoids, clutches, etc. in the aforementioned transmitting mechanism section and receiving mechanism section. A mechanism control unit 32 that controls mechanical elements of conversion, and the above-mentioned encoding/decoding/control unit 31
and the functional operation of the mechanism control unit 32 (consisting of a power source 33 that supplies various necessary voltages and currents).

Here, the detailed configuration of the encoding/decoding/control section 31 is as shown in the block diagram shown in FIG.

Namely, a microprocessor 304 that controls the entire apparatus via an address bus 301, a control path 302, and a data bus 303t, a program memory 305 that stores its control procedure program, and the above-mentioned dangerous laser beam electrophotographic record. An image having a bit capacity equivalent to at least the number of pixels for one page of the reception record, which is provided so that the deflector 73 and the photosensitive drum 8 in FIG. 1 can be continuously performed without frequent start/stop operations. Bitmap memory 306 for storing information, DMA controller 307 for transferring and controlling memory contents at high speed
, a line interface 308 that connects the line according to a predetermined transmission procedure, controls input/output of facsimile signals, and receives facsimile signals sent from the transmission line; and selects either transmission or reception operation. A selector 309 that controls the direction of flow of facsimile signals receives the image signal of the transmission document read by the above-mentioned transmission mechanism section 10 via the data bus 303t, and uses a predetermined encoding method, for example, MR4 and MR. An encoding unit 310 performs encoding according to a method, a decoding unit 311 performs the reverse conversion of the received encoded data to obtain an image signal, and a laser beam electrophotograph converts the obtained image signal. An image processing section 312 and a high-speed line memory 313 that perform processing to adapt to the recording format, such as resolution conversion, and a reading scanning interface for exchanging image signals between the transmitting mechanism section 202 and the receiving mechanism section 203. 314 and reception record interface 31
5. Although not shown in Fig. 1, there is an operation panel interface for connecting switches, lamps, displays, etc. of the operation panel section 204 located at the top of the device and for sending and receiving signals. It is configured.

The function and operation of the facsimile machine described above will be explained below.

First, during the transmission operation, after setting the document width guide 13 according to the width of the document to be transmitted, place the single or stacked document to be transmitted onto the paper feed tray 11 so that its leading edge reaches the self-feeding roller 24. Place it. Then, the document detection sensor 2
The lever No. 5 rotates, the photocoupler operates, and a signal indicating that the document is placed on the paper feed table is issued. Based on this signal,
The encoding/decoding/control unit 31 and mechanism control unit 32 described above are
It functions according to a predetermined procedure. First, the stepping motor 37 for driving is rotated, and each driving section of the automatic paper feeding section 20 and the sub-scanning mechanism section 30 is rotated. In synchronization with the start of rotation of the driving stepping motor 37, an electromagnetic clutch (not shown) operates to rotate the self-supplying roller 24, and the stepping motor 23 for rotationally driving the reverse roller 22 also starts rotating tm and kicks. The roller 21 and the reversing roller 22 start rotating.

At this time, the reversing roller 22 rotates in the opposite direction to the rotation direction of the self-feeding roller 24 shown in the figure, suppresses the movement of the uppermost documents placed on the paper feed table 11, and only feeds the one document at the lowest position. transport. After the next document is conveyed, it is detected by the intermediate sensor 40 to check its passage, and after reaching the drive roller 31 and the pinch row 233, the electromagnetic clutch stops operating, and the power transmission to the self-feeding row 224 is interrupted. It hangs down and stops rotating. At the same time, the stepping motor 23 for driving the reversing roller 22 also stops rotating to prevent unnecessary damage to the transmitted document. After that, the manuscript Fi
It is conveyed by the action of the drive roller 31 and the pinch row 233, and after its leading edge is detected by an edge sensor (not shown), it is fed by a predetermined amount so that the leading edge correctly reaches the reading scanning position, and then stopped. After that, set the transmission mode,
When the number of the communication partner is specified by operating the operation buttons on the operation panel section 204 shown in FIG. 2, the NCU is
・The modem section functions and connects the line.

After confirming through a signal sound or display that a signal indicating that connection with the intended communication partner has been returned, the user presses the communication button on the operation panel section 204. This starts the transmission operation. First, the transmission document whose leading edge is at the reading scanning position is irradiated by the two fluorescent lamps 51, and the reflected image bends the optical path via the plane reflection mirror 52. The lens 53 forms an image on the light receiving surface of the CCD image sensor 54 . In this way, the COD image sensor converts the shading information of the original transmission document into an electrical signal at a predetermined scanning speed, obtains a serial analog image signal, and transmits it to electrical circuits (not shown), such as an A/D conversion circuit, a shading correction circuit, A
A digital image signal is obtained by performing necessary processing using a GC circuit or the like. This signal is transmitted via the data bus to the code/combination/control unit 201 of the fc FIG. , the redundancy is suppressed and converted into code data. The encoded data is sent out to the transmission line via the line interface.

Each time the transmitted document is read and scanned in units of scanning lines, the stepping motor 37 is rotated by a predetermined angle corresponding to the scanning line pitch of the transmitted document, and the rotational force is transmitted to the drive rollers 31 and 32, and the pinch The original to be transmitted is fed by cooperation with the rollers 33 and 34, and the transmission operation is performed as described above.

Next, the reception operation will be explained.

Facsimile signals sent from a remote IJ device over a transmission line are received via line interface 308 under the control of microprocessor 304 in FIG. The received facsimile signal is applied to the decoding section 311 via the selector 309. In the decoding unit 311, the microprocessor 304
An image signal is restored from the encoded data by a conversion reverse to the encoding 310 described above, that is, by a predetermined encoding method, for example, the MH or MR method. The image signal obtained in this way is sent to the image processing section 312, where the resolution is converted as necessary, for example, 8 pixels/M, and the next image signal is transmitted to the receiving mechanism section at a recording pixel density of, for example, 16 pixels/M. After performing processing such as conversion to conform to w- and logical operations for reduction or enlargement, the images are sequentially received and recorded in the bitmap memory 306 via the data bus 303 in correspondence with the images to be recorded. Accumulated. In this way, the entire page is received, decoded, and image processed.

After the storage of the image signal in the IJ 306 is completed, the microprocessor 304 issues a mechanism control signal to the reception mechanism unit 203 via the reception recording interface 315, and also outputs a laser change W4 signal which is an image signal. Send out. Mechanism control signal (receiving mechanism section 6 in Fig. 1)
Each portion of 0 initiates an operation for recording. First, the photosensitive drum 81 begins to rotate, and its surface is charged by the charger 82 to a certain electrostatic potential, for example, several hundred volts. Next, this photosensitive drum 81 is moved to the laser beam generating section 7.
The laser beam 72 modulated by the above-mentioned image signal from 1 is scanned and exposed with a light beam that is temporally/angularly deflected by a rotating polygon built in an optical deflector 73. As mentioned above, this laser beam is modulated so that the area to be recorded is blocked and the area that is not recorded, that is, the white area, is emitted. Therefore, the surface of the photosensitive drum 81, that is, the photoconductor, The electrical resistance of the hit area decreases, and the static charge rapidly attenuates and disappears. On the other hand, the laser beam is interrupted during scanning, and the portions of the photoconductor that are not exposed to light retain their charged potential. On the other hand, the photosensitive drum 81 rotates while receiving the scanning exposure of the laser beam, and sequentially passes through the developing device 83t starting from the portion receiving the scanning exposure. The developing device 83 uses a well-known technique, for example, a magnet, a magnetic brush, etc., to form a two-component developer containing toner and iron powder as a carrier into a magnetic brush.
It consists of a trawl, a conveyor roll, a doctor plate, a hopper, etc. Then, regular development is performed by rubbing the surface of the photosensitive drum 81 with the ears of the magnetic brush thus formed, and the electrostatic latent image is visualized. The photoreceptor drum 81 thus developed continues to rotate and reaches the transfer device 841C, where it is selected according to the size of the original to be sent, and the recording paper stored in either the recording paper cassette 101 or 104 is transferred. One sheet of the top layer of At or B is fed to the paper feed roller 102t.
or 105, and the recording paper guide path 10.
7 or 108, the alignment mechanism 114 located near the feed roller 110 and the pinch row 2111 adjusts the posture, and the feed roller and pinch roller pair 1
10, 111, and the recording paper detection sensor 91
After its passage is detected by the feed roller and pinch row 2 pair 112, 113, the recording paper guide path 1 is
After passing through 09'i, it is conveyed and comes into close contact with the next recording paper. Transfer device 84
generates corona ions by receiving a DC high voltage of the same polarity as the charging polarity of the photoreceptor drum i1 from the high voltage generator 91,
The toner image on the photosensitive drum 81 described above is transferred to the recording paper by the action of the electric field. Thereafter, the recording paper is transferred to a peeler 85 which, like the transfer device 84 described above, is supplied with an AC voltage of several KV from a high voltage generator 91 to generate corona ions.
The photoreceptor drum 81 is peeled off from the photoreceptor drum 81 by the following steps. The peeled recording paper is conveyed by a suction belt 87 with the toner image side facing up, and sent to a fixing device 88 . And the fixing device 88
The toner image is simultaneously melted and fixed while being compressed by a pair of heat rolls to obtain a permanent image. After the fixing is completed, the companion recording paper is sent by the discharge row 289 and the pinch roller 90, and after the discharge operation of the recording paper is detected by the recording paper detection unit 91, it is deposited on the receiving star 61. The image signal for the next page of recording stored in the pit map memory 306 included in the encoding/decoding/control unit 31 in FIG. It is reset by a signal based on the complete completion of the recording paper ejection operation.

The foregoing has been a description of a normal case of reception and recording operation, but a case of abnormal operation, such as a jam of the recording paper midway through its travel, will be described.

As described above, the recording paper is fed from either the recording paper cassette 101 or 104 to the paper feed roller 102 or 105.
The recording paper guide path 107 or #'11
08, the alignment mechanism 114 located near the feed roller 110 and the pinch roller 111 adjusts the posture, and the pairs of the feed roller and the pinch roller tio, ii
1, and its passage is detected by the recording paper detection sensor 115. However, if the recording paper jams for some reason during the recording paper feeding process up to this point, its progress is hindered. In this case, the recording paper does not reach the recording paper detection sensor 115, and therefore the passage of the recording paper cannot be detected. This is treated as an occurrence of an abnormal situation by monitoring by the microprocessor 304 in FIG. 2, and, for example, all operations of the receiving mechanism section are stopped, and an abnormality indicator lamp on an operation panel (not shown) arranged at the top of the device is turned on. . The operator thereby becomes aware of the abnormal condition and removes the jammed recording paper. After that, when the reset button on the operation panel is pressed, the receiving mechanism starts operating again. At this time, since the signal based on the completion of the recording paper ejection operation by the recording paper detection sensor 91 described above is not emitted, the image signal for recording stored in the bitmap memory 306 is reset. Therefore, the normal operation as described above is possible even if the data is stored without being stored.P1 Correct reception records can be obtained.Now, we have explained the measures based on recording paper detection and detection of an abnormal situation by the sensor 115. Similarly, an abnormal situation between the recording paper detection sensor 91 and the discharge row 289 can be detected by the recording paper detection center t91, so that it is possible to obtain a correct reception record in that case as well.

In this way, recording and receiving operations are performed using bitma.

separated via memory. In normal facsimiles, such as thermal recording, the timing of the end of reception and the end of recording are almost the same, so it is possible to confirm the normal end of recording with a slight delay from the time when the document end command is received from the sending side, and document A termination affirmative response can be returned. This timing is shown in the third position.

On the other hand, with this method, in which all the image signals for -pages are received in the bitmap memory, and then recorded by continuous reading from the memory, it is not possible to confirm that the recording has been completed normally. is the timing at which the recording of the final page in ) in FIG. 3 ends. Therefore, this conventional 8iy
In Aximili, normal recording completion is confirmed after a delay of T (RAG) seconds after the final data is received, and then an acknowledgment completion response is returned, resulting in wasted line holding time.

However, as described above, even if an abnormal condition such as a jam occurs in the 7-axis system of this embodiment, since this received data is stored in the bitmap memory 306, it is possible to complete the process normally by re-recording. can. Therefore, as shown in Figure 3 (q), even if the document end acknowledgment response is returned at the timing of the end of reception, there will be no problem.Therefore, the document end acknowledgment response is sent back after receiving the document end command. There will be no delays and no wasted line holding time.

As described above, in this embodiment, a bitmap memory 306 for storing image information is included in an electronic circuit for performing control necessary for facsimile communication, and has a bit capacity corresponding to at least the number of pixels for one page of reception records. A dot-by-dot image signal to be received and recorded is stored therein, and a recording detection sensor 91 installed at the recording paper ejecting portion after receiving and recording completes the recording paper ejection operation. Since the contents of the bitmap memory 306 are reset by the detection signal based on the complete completion, the received data will not be lost in the event of a failure such as a paper jam during reception recording. It has the advantage that after a predetermined operation, it is possible to obtain a correct reception record again. Furthermore, by returning a response, this advantage also has the advantage of reducing wasted line holding time and lowering communication costs.

〔Effect of the invention〕

As described in detail above, according to the present invention, in a facsimile machine to which an electrophotographic recording method using a laser beam is applied, a transmission system comprising a paper feed table, an automatic paper feed section, a sub-scanning mechanism section, and a reading optical system is provided. A control unit consisting of a mechanism section, a receiving equipment section consisting of a laser oscillator, a deflector, and an image recording section using xerography electrophotographic recording method, and an electronic circuit and a power supply circuit for controlling necessary for facsimile communication. and a transmitting mechanism section from the top of the device,
The receiving mechanism section and the control section are arranged in this order, and the reading optical system in the transmitting mechanism section and the optical axis including the laser oscillator and deflector in the receiving mechanism section are arranged on substantially the same plane. , good space factor,
This has the advantage that a compact device can be manufactured.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the configuration of a facsimile machine to which an electrophotographic recording method using a laser beam is applied according to an embodiment of the present invention, and FIG. FIG. 2 is a professional diagram showing the configuration of a decoding/control unit. FIG. 3 is a diagram for explaining the timing of the end of reception and the end of recording.

Claims (1)

[Claims] A transmitting mechanism section consisting of a paper feed table, an automatic paper feeding section, a sub-scanning mechanism section, and a reading optical system, and a receiving mechanism section consisting of a laser oscillator, a deflector, and an image recording section using xerographic electrophotographic recording method. and a control circuit consisting of an electronic circuit including a bit mat memory for storing image information having a bit capacity equivalent to the number of pixels of at least one page of received records, and a power supply circuit to perform the control necessary for facsimile communication. In a facsimile machine comprising a facsimile machine, a recording paper detection sensor is provided at a discharge portion of the recording paper after reception recording of the receiving mechanism unit is completed, and a recording paper detection sensor is provided at a recording paper ejection portion of the recording paper detection sensor when the recording paper ejection operation is completely completed. The content stored in the bitmap memory is reset in response to a base detection signal, and when a document end command is received from the other party's facsimile machine, a document end acknowledgment response is sent back without waiting for the end of recording. facsimile machine.