JPS61131673A - Facsimile sub-scanning system - Google Patents

Abstract

PURPOSE:To eliminate irregular printing to prevent recording and reading-out under transient state of sub-scanning speed by providing the first and second storing means in which facsimile signals are stored alternately. CONSTITUTION:When starting to transmit an original, a control part 13 starts to sub-scan while controlling a motor driving part 24. The read-out facsimile signals are stored in a storage part A or B alternately. Simultaneously with the storing completed, the control part 13 makes a transmission control part 10 start to transmit, while specifying transmitting address. When completing the transmission, the control part 13 judges that the storage parts A and B are empty and switches a motor 4 to a sub-running speed mode. After the fixed period, it commands a reading-out part 8 to read-out by returning again the motor to the normal running-constant speed mode. In the case of reception, the same process as stated above is proceeded. When the storage part A or B is filled, recording is started, and when empty, the motor is set to the normal running-deceleration, and then to the reverse running-stop mode. After the other storage part is filled, recording is started again by switching the motor from the sub-running speed to the constant speed mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile machine, and more particularly to a paper feed, ie, sub-scanning method, for a transmitted document during transmission and recording paper during reception.

Since facsimile machines usually have faster reading and recording speeds than communication transmission speeds with other devices, it is necessary for the facsimile machines to stand by and synchronize.

As a waiting method, paper feeding, that is, intermittent feeding in sub-scanning, is often used, but it has the following problems.

(1) Due to repeated irregular and instantaneous starting and stopping,
Loud noise.

(2) Instantaneous start-up/stopping has reached the mechanical limit, and reading and recording are performed in a transient state in sub-scanning, resulting in sub-scanning unevenness (printing unevenness).

One way to solve the above problems is to provide a memory for one page and sub-scan the entire page at a constant speed, but the page length and amount of information are not constant, and all the reading and There is a problem in that a large capacity memory is required to prepare the page memory for recording, which increases costs.

Therefore, there is a need for a simple sub-scanning method that solves the problems (1) and (21) above.

[Conventional technology] The conventional technology will be explained below.

FIG. 2 (al is a block diagram showing a conventional facsimile machine, and FIG. 2 (bl is a time chart showing a sub-scanning operation).

First, the outline of the facsimile machine will be explained using FIG. 2(a).

In the figure, 1 is a document, 2 is a paper feed roller, 3 is a document receiver, 4
5 is a transmitting motor, 5 is a fluorescent lamp, 6 is a condensing lens, 7 is an image sensor, and 8 is a reading section, and the above configuration constitutes a document reading mechanism.

When document transmission is started, the transmission motor 4 operates, the document 1 is fed by the roller 2, and the information of the document 1 is collected by the reflected light from the fluorescent lamp 5 on the lens 6 and sent to the image sensor 7. The information is stored and read by the reading section 8.

The read signal is further encoded by the band compression section 9 and stored in the temporary storage section 11, and then sequentially transmitted to the partner device through the communication control section 10.

Further, 16 is a recording paper receiver, 17 is a cutter, 18 is a thermal head, 19 is a recording paper, 20 is a paper feed roller, and 21 is a receiving motor, which constitutes a recording mechanism.

The received facsimile signal is stored in the storage unit 11 through the communication control unit 10, and is restored to the original facsimile signal in the band expansion unit 15. The recording paper 19 is sub-scanned under the control of the recording control unit 14, and the print record is recorded. be done.

In the above operation, synchronization is achieved within the storage capacity range of the storage section 11 by controlling the recording/reading speed to be faster than the transmission speed, scanning, stopping, etc.

To explain the case of transmission with respect to the sub-scanning operation time chart in FIG. When the transmission process of the facsimile signal in 1 is completed, the document is sub-scanned from 31 to 82.

The above-mentioned sub-scanning operation is performed for each line depending on the capacity of the storage unit 11, but starting and stopping of the transmitting motor 4 cannot be done instantaneously.
t2. t3 to t4), the signal lacks linearity.

The same goes for reception; the recording speed is set faster than the reception speed, and the sub-scanning operation is on standby depending on the capacity of the storage unit 11 as shown in FIG. Printing unevenness occurs when stopped.

[Problem that the invention seeks to solve]

As explained above, the conventional sub-scanning method repeatedly starts and stops irregularly and instantaneously, making it very noisy.
Furthermore, since recording and reading are performed while the sub-scanning speed is transient, there is a problem in that uneven printing occurs.

[Means for solving problems]

The above-mentioned conventional problems are as follows: first and second storage means for alternately storing facsimile signals; detecting means for detecting storage limits and emptiness of each; If the second storage means is empty when the means reaches its storage limit, the subsequent facsimile signal is sent to the second storage means.
and when the second storage means is not empty, after stopping the reading of the transmitted original, the sub-scanning speed is decelerated and stopped, and the transmitted original is reversely fed to the reading stop position. a drive means for stopping at a further rear position;
a driving means for driving the transmission document at a predetermined sub-scanning speed at the reading stop position after detecting that the second storage means is empty; means for storing received facsimile signals in the first. means for alternately storing in the second storage means; and detection means for recording from one of the storage means that has reached its storage limit and detecting the end of recording processing of the facsimile signal stored in the storage means;
A driving means that decelerates the sub-scanning speed in response to the detection signal, and after stopping, reversely feeds the recording paper from the recording end position and stops, and a receiving facsimile signal to the other storage means, which starts sub-scanning when the storage limit is reached, and starts sub-scanning as described above. This problem can be solved by the sub-scanning method of the present invention, which has a driving means for driving to a recording stop position at a predetermined sub-scanning speed, and a means for starting recording when the recording stop position is reached.

[Effect]

According to the present invention, the transmitting/receiving motor smoothly decelerates to a stop, then reverses and feeds back beyond the recording/reading stop position, which reduces noise and when recording/reading resumes, runs up to the recording/reading stop position. Since a constant speed is reached at the reading position, there is an effect that printing unevenness does not occur.

The sub-scanning operation of the present invention will be explained with reference to FIG. 1('b).

(2) and (2) are recording/reading periods, (2) is a deceleration period in which the speed is decelerated by a recording/reading stop signal, and (2) is a reversal period in which the recording/reading stop position S1 is fed backward and stopped at 81'. (2) is a standby period in which one of the storage means waits until the transmission/reception process is completed. (2) is a run-up period in which the laser is driven so as to reach a constant sub-scanning speed at Sl.

Time t1 is when one of the storage means reaches the storage limit.
2 is detected when it is empty or full due to transmission/reception processing, and t3 is detected when sub-scanning a distance of 31 from Sl', and the respective functions are activated as control signals. Explain using.

FIG. 1(al) is a block diagram of a facsimile machine showing an embodiment of the present invention, FIG. 1(C) is a block diagram of the motor drive unit 24, and FIG. The chart in FIG. 1(e) is a time chart representing a second embodiment in which smooth acceleration/deceleration is omitted.

In FIG. 1(a), a storage unit A and a storage unit B are storage units that alternately store transmitted and received facsimile signals.

Reference numeral 24 denotes a motor drive section for performing sub-scanning of the present invention, a detailed block diagram of which is shown in FIG. 1(C).

In FIG. 1(C), 24a is a line counter.

24b is an AND circuit, and 24C is a drive pulse generator.

24d and 24h are up/down counters, and 24e.

243 is a decoder, 24f and 24 are drivers.

4 and 21 are transmitting and receiving pulse motors, respectively.

In addition, in the figure, MO, Ml, and M2 are constant speeds ■■.

It is an encoded mode designation signal that specifies each mode of forward rotation deceleration■, reverse rotation stop■, and forward rotation run-up speed■, and is 1.
For example, it is defined as follows.

M2 MI MO 000 - Forward rotation constant speed 0 0 1 - Forward rotation deceleration 110 - Reverse rotation stop 0 1 1 - Forward rotation approach speed drive pulse generator 24c is, for example, shown in FIG. 1(d) - (6
The drive pulse generation pattern shown in 1 is memorized.

The control unit 13 designates mode designation signals MO and Ml to generate the drive pulses.

The line counter 24a counts recording or reading scanning lines, receives a preset value from the control section 13, counts output pulses from the drive pulse generation section 24c, and outputs an output when a predetermined number of lines have been counted.

The preset value is l line for forward rotation and constant speed.

In the case of other modes, the drive pulse conversion is set so that the running i-lines in the mode can be counted. Therefore, the carry output of the line counter 24a is used for each line in the forward rotation constant speed mode, and indicates the end of scanning in the other modes, and is used as a timing signal for the ninth operation.

The up/down counters 24d, 24h count up or down the output signal PMCK of the drive pulse generator 24c by M2 (O or 1 of No. 3).
Decoded by 4j.

The transmitting pulse motor 4 or the receiving pulse motor 21 is driven by the drivers 24f and 24k.

Note that the motor is driven or set to a stop mode by the transmittable signal 5FEB and the receivable signal RPEH.

The operation will be explained below by taking transmission as an example while referring to Figures 1(al to d).In Figure 1(d), (1) is a read (or record) signal, and (2) is a transmission ready signal. 5FE
B (receivable signal RPEB), (31 is MO signal, (4)
is the Ml signal, (5) is the M2 signal, and (6) is the drive pulse P.
Represents MCK.

(1) When the transmission of the document starts, the control unit 13 controls the motor drive unit 24 to start sub-scanning, but at first the document reaches a certain speed, and the leading edge of the document is detected and reading starts. do.

(2) Count the output of the line counter 24a.

When the number of lines that can be stored in the storage unit A or the storage unit B is read from the transmission document, the control unit 13 activates the motor drive unit 24.
Forward rotation deceleration signal CM'O-1.

M1, M2-0), and outputs a preset value to the line counter 24a.

(3) In the motor drive section 24, the drive pulse generation section 24C generates a designated drive pulse and drives the transmission pulse motor 4 through the up/down counter 24d.

(4) The control unit 13 monitors the output of the line counter 24a, confirms that the forward rotation has been decelerated by a predetermined number of lines, and sets the reverse rotation stop mode.

(5) After confirming the stop, the control section 13 sets the transmittable signal 5PEB and puts the motor drive section 24 in a standby state.

(6) The control section 13 stores the read facsimile signal in the storage section A or the storage section B, and upon completion of storage in the storage section, it specifies a transmission address to the communication control section 10 and causes the signal to be transmitted.

(7) When the communication control unit 10 notifies that the transmission is complete, the control unit 13 determines that the storage unit is empty, and the motor drive unit 24
Start.

(8) The control unit 13 sets the run-up speed mode, and after confirming the generation of a predetermined pulse, sets the control unit 13 to the forward rotation constant speed mode, and
A reading instruction is output to the reading section 8.

The above operation is repeated until the document is completed.

The case of reception is the same as above, and recording starts when storage unit A or storage unit B is filled with received facsimile signals, and normal rotation deceleration occurs from the time it becomes empty.

Set to reverse rotation stop mode, and when the other storage section becomes full, set to run-up speed mode, and resume recording when set to constant scanning speed.

Note that it is also possible to omit the reverse rotation stop operation until the processing of one of the storage units for both transmission and reception is completed, and to read and record continuously.

FIG. 1(e) is a time chart showing a simple method of stopping the reverse rotation that omits the smooth stop of the reverse rotation.

As shown in the figure, it overruns (a) at a constant speed (constant pulse interval), stops (b), and then reverses at the same speed (c).
L. This is a method of stopping and waiting at a predetermined position (d).

Even with the above method, the effect of reading and recording at a constant speed is the same, and the device can be expected to be simplified.

〔Effect of the invention〕

As explained above, according to the present invention, recording and reading can be performed at a constant sub-scanning speed, uneven printing can be eliminated, and instantaneous startup and reading can be performed by setting deceleration and approach speed modes.
Since there are no stops, it has the effect of reducing noise.

[Brief explanation of the drawing]

FIG. 1 (al is a block diagram of a facsimile machine implementing the present invention. FIG. 1(b) is a time chart showing the sub-scanning operation of the present invention. FIG. 1 (C1 is a block diagram of a motor control section. Figure (d) is an operation time chart of motor control. Figure 1 (e) is a time chart showing a simplified method that omits smooth reversal. Figure 2 (al is a program diagram of a conventional facsimile machine. Figure (b) is a time chart showing the conventional sub-scanning operation. In the figure, 4 is a transmitting motor, 8 is a reading section, 10 is a communication control section, 13 is a control section. 24a is a line counter. 24c is a drive pulse Generation section. 24d and 24h are up/down counters. 24e and 24j are decoders. 24f and 24 are drivers. Fig. 1 (C) Fig. 31 (it) Fig. 1 Ce) Fig. 2 (∊) l Figure 2(b)

Claims (4)

[Claims] (1) A sub-scanning drive method for recording and reading facsimile signals, which reduces the sub-scanning speed after stopping recording or reading, and stops the recording paper or the transmission document from being reversely fed behind the stop position; It is characterized by having means for running up from the reverse feed stop position to reach a predetermined sub-scanning speed at the recording/reading stop position and to start recording/reading, so that recording/reading is performed at a constant sub-scanning speed. Facsimile sub-scanning method. (2) a detection means comprising first and second storage means for alternately storing facsimile signals and detecting storage limits and emptiness of each; and a detection means for storing transmitted facsimile signals in the first storage means; When the limit is reached, if the second storage means is not empty, reading of the transmitted document is stopped, and when the second storage means is detected to be empty, reading is started. Facsimile sub-scanning method described in section 1). (3) Means for alternately storing received facsimile signals in first and second storage means, and starting recording from one storage means that has reached its storage limit, and ending recording of facsimile signals in the storage means; Claim No. (1) characterized in that recording is stopped when the storage means is in storage.
Facsimile sub-scanning method described in Section 1. (4) The facsimile sub-scanning method according to claim (1), characterized in that the facsimile sub-scanning method advances and reverses at the reading/recording sub-scanning speed and then stops.